src/modules/m_spanningtree.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 /* $ModDesc: Povides a spanning tree server link protocol */
  15
  16 #include "configreader.h"
  17 #include "users.h"
  18 #include "channels.h"
  19 #include "modules.h"
  20 #include "commands/cmd_whois.h"
  21 #include "commands/cmd_stats.h"
  22 #include "socket.h"
  23 #include "inspircd.h"
  24 #include "wildcard.h"
  25 #include "xline.h"
  26 #include "transport.h"
  27
  28 /** If you make a change which breaks the protocol, increment this.
  29  * If you  completely change the protocol, completely change the number.
  30  *
  31  * IMPORTANT: If you make changes, document your changes here, without fail:
  32  * http://www.inspircd.org/wiki/List_of_protocol_changes_between_versions
  33  *
  34  * Failure to document your protocol changes will result in a painfully
  35  * painful death by pain. You have been warned.
  36  */
  37 const long ProtocolVersion = 1103;
  38
  39 /*
  40  * The server list in InspIRCd is maintained as two structures
  41  * which hold the data in different ways. Most of the time, we
  42  * want to very quicky obtain three pieces of information:
  43  *
  44  * (1) The information on a server
  45  * (2) The information on the server we must send data through
  46  *     to actually REACH the server we're after
  47  * (3) Potentially, the child/parent objects of this server
  48  *
  49  * The InspIRCd spanning protocol provides easy access to these
  50  * by storing the data firstly in a recursive structure, where
  51  * each item references its parent item, and a dynamic list
  52  * of child items, and another structure which stores the items
  53  * hashed, linearly. This means that if we want to find a server
  54  * by name quickly, we can look it up in the hash, avoiding
  55  * any O(n) lookups. If however, during a split or sync, we want
  56  * to apply an operation to a server, and any of its child objects
  57  * we can resort to recursion to walk the tree structure.
  58  * Any socket can have one of five states at any one time.
  59  * The LISTENER state indicates a socket which is listening
  60  * for connections. It cannot receive data itself, only incoming
  61  * sockets.
  62  * The CONNECTING state indicates an outbound socket which is
  63  * waiting to be writeable.
  64  * The WAIT_AUTH_1 state indicates the socket is outbound and
  65  * has successfully connected, but has not yet sent and received
  66  * SERVER strings.
  67  * The WAIT_AUTH_2 state indicates that the socket is inbound
  68  * (allocated by a LISTENER) but has not yet sent and received
  69  * SERVER strings.
  70  * The CONNECTED state represents a fully authorized, fully
  71  * connected server.
  72  */
  73 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  74
  75 /* Foward declarations */
  76 class TreeServer;
  77 class TreeSocket;
  78 class Link;
  79 class ModuleSpanningTree;
  80 class SpanningTreeUtilities;
  81
  82 /* This hash_map holds the hash equivalent of the server
  83  * tree, used for rapid linear lookups.
  84  */
  85 typedef nspace::hash_map<std::string, TreeServer*, nspace::hash<string>, irc::StrHashComp> server_hash;
  86
  87 typedef std::map<TreeServer*,TreeServer*> TreeServerList;
  88
  89 /** A group of modules that implement InspSocketHook
  90  * that we can use to hook our server to server connections.
  91  */
  92 typedef std::map<irc::string, Module*> hookmodules;
  93
  94 /** The Link class might as well be a struct,
  95  * but this is C++ and we don't believe in structs (!).
  96  * It holds the entire information of one <link>
  97  * tag from the main config file. We maintain a list
  98  * of them, and populate the list on rehash/load.
  99  */
 100 class Link : public classbase
 101 {
 102  public:
 103         irc::string Name;
 104         std::string IPAddr;
 105         int Port;
 106         std::string SendPass;
 107         std::string RecvPass;
 108         unsigned long AutoConnect;
 109         time_t NextConnectTime;
 110         bool HiddenFromStats;
 111         std::string FailOver;
 112         std::string Hook;
 113         int Timeout;
 114 };
 115
 116 class HandshakeTimer : public InspTimer
 117 {
 118  private:
 119         InspIRCd* Instance;
 120         TreeSocket* sock;
 121         Link* lnk;
 122         SpanningTreeUtilities* Utils;
 123         int thefd;
 124  public:
 125         HandshakeTimer(InspIRCd* Inst, TreeSocket* s, Link* l, SpanningTreeUtilities* u);
 126         virtual void Tick(time_t TIME);
 127 };
 128
 129
 130 /** Contains helper functions and variables for this module,
 131  * and keeps them out of the global namespace
 132  */
 133 class SpanningTreeUtilities
 134 {
 135  private:
 136         /** Creator server
 137          */
 138         InspIRCd* ServerInstance;
 139  public:
 140         /** Creator module
 141          */
 142         ModuleSpanningTree* Creator;
 143         /** Flatten links and /MAP for non-opers
 144          */
 145         bool FlatLinks;
 146         /** Hide U-Lined servers in /MAP and /LINKS
 147          */
 148         bool HideULines;
 149         /** Announce TS changes to channels on merge
 150          */
 151         bool AnnounceTSChange;
 152         /** Synchronize timestamps between servers
 153          */
 154         bool EnableTimeSync;
 155         /** Socket bindings for listening sockets
 156          */
 157         std::vector<TreeSocket*> Bindings;
 158         /** This variable represents the root of the server tree
 159          */
 160         TreeServer *TreeRoot;
 161         /** IPs allowed to link to us
 162          */
 163         std::vector<std::string> ValidIPs;
 164         /** Hash of currently connected servers by name
 165          */
 166         server_hash serverlist;
 167         /** Holds the data from the <link> tags in the conf
 168          */
 169         std::vector<Link> LinkBlocks;
 170
 171         hookmodules hooks;
 172         std::vector<std::string> hooknames;
 173
 174         /** Initialise utility class
 175          */
 176         SpanningTreeUtilities(InspIRCd* Instance, ModuleSpanningTree* Creator);
 177         /** Destroy class and free listeners etc
 178          */
 179         ~SpanningTreeUtilities();
 180         /** Send a message from this server to one other local or remote
 181          */
 182         bool DoOneToOne(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string target);
 183         /** Send a message from this server to all but one other, local or remote
 184          */
 185         bool DoOneToAllButSender(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string omit);
 186         /** Send a message from this server to all but one other, local or remote
 187          */
 188         bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit);
 189         /** Send a message from this server to all others
 190          */
 191         bool DoOneToMany(const std::string &prefix, const std::string &command, std::deque<std::string> &params);
 192         /** Send a message from this server to all others
 193          */
 194         bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params);
 195         /** Send a message from this server to all others, without doing any processing on the command (e.g. send it as-is with colons and all)
 196          */
 197         bool DoOneToAllButSenderRaw(const std::string &data, const std::string &omit, const std::string &prefix, const irc::string &command, std::deque<std::string> &params);
 198         /** Read the spanningtree module's tags from the config file
 199          */
 200         void ReadConfiguration(bool rebind);
 201         /** Add a server to the server list for GetListOfServersForChannel
 202          */
 203         void AddThisServer(TreeServer* server, TreeServerList &list);
 204         /** Compile a list of servers which contain members of channel c
 205          */
 206         void GetListOfServersForChannel(chanrec* c, TreeServerList &list, char status, const CUList &exempt_list);
 207         /** Find a server by name
 208          */
 209         TreeServer* FindServer(const std::string &ServerName);
 210         /** Find a route to a server by name
 211          */
 212         TreeServer* BestRouteTo(const std::string &ServerName);
 213         /** Find a server by glob mask
 214          */
 215         TreeServer* FindServerMask(const std::string &ServerName);
 216         /** Returns true if this is a server name we recognise
 217          */
 218         bool IsServer(const std::string &ServerName);
 219         /** Attempt to connect to the failover link of link x
 220          */
 221         void DoFailOver(Link* x);
 222         /** Find a link tag from a server name
 223          */
 224         Link* FindLink(const std::string& name);
 225 };
 226
 227
 228 /** Each server in the tree is represented by one class of
 229  * type TreeServer. A locally connected TreeServer can
 230  * have a class of type TreeSocket associated with it, for
 231  * remote servers, the TreeSocket entry will be NULL.
 232  * Each server also maintains a pointer to its parent
 233  * (NULL if this server is ours, at the top of the tree)
 234  * and a pointer to its "Route" (see the comments in the
 235  * constructors below), and also a dynamic list of pointers
 236  * to its children which can be iterated recursively
 237  * if required. Creating or deleting objects of type
 238  i* TreeServer automatically maintains the hash_map of
 239  * TreeServer items, deleting and inserting them as they
 240  * are created and destroyed.
 241  */
 242 class TreeServer : public classbase
 243 {
 244         InspIRCd* ServerInstance;               /* Creator */
 245         TreeServer* Parent;                     /* Parent entry */
 246         TreeServer* Route;                      /* Route entry */
 247         std::vector<TreeServer*> Children;      /* List of child objects */
 248         irc::string ServerName;                 /* Server's name */
 249         std::string ServerDesc;                 /* Server's description */
 250         std::string VersionString;              /* Version string or empty string */
 251         int UserCount;                          /* Not used in this version */
 252         int OperCount;                          /* Not used in this version */
 253         TreeSocket* Socket;                     /* For directly connected servers this points at the socket object */
 254         time_t NextPing;                        /* After this time, the server should be PINGed*/
 255         bool LastPingWasGood;                   /* True if the server responded to the last PING with a PONG */
 256         SpanningTreeUtilities* Utils;           /* Utility class */
 257
 258  public:
 259
 260         /** We don't use this constructor. Its a dummy, and won't cause any insertion
 261          * of the TreeServer into the hash_map. See below for the two we DO use.
 262          */
 263         TreeServer(SpanningTreeUtilities* Util, InspIRCd* Instance) : ServerInstance(Instance), Utils(Util)
 264         {
 265                 Parent = NULL;
 266                 ServerName = "";
 267                 ServerDesc = "";
 268                 VersionString = "";
 269                 UserCount = OperCount = 0;
 270                 VersionString = ServerInstance->GetVersionString();
 271         }
 272
 273         /** We use this constructor only to create the 'root' item, Utils->TreeRoot, which
 274          * represents our own server. Therefore, it has no route, no parent, and
 275          * no socket associated with it. Its version string is our own local version.
 276          */
 277         TreeServer(SpanningTreeUtilities* Util, InspIRCd* Instance, std::string Name, std::string Desc) : ServerInstance(Instance), ServerName(Name.c_str()), ServerDesc(Desc), Utils(Util)
 278         {
 279                 Parent = NULL;
 280                 VersionString = "";
 281                 UserCount = ServerInstance->UserCount();
 282                 OperCount = ServerInstance->OperCount();
 283                 VersionString = ServerInstance->GetVersionString();
 284                 Route = NULL;
 285                 Socket = NULL; /* Fix by brain */
 286                 AddHashEntry();
 287         }
 288
 289         /** When we create a new server, we call this constructor to initialize it.
 290          * This constructor initializes the server's Route and Parent, and sets up
 291          * its ping counters so that it will be pinged one minute from now.
 292          */
 293         TreeServer(SpanningTreeUtilities* Util, InspIRCd* Instance, std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock)
 294                 : ServerInstance(Instance), Parent(Above), ServerName(Name.c_str()), ServerDesc(Desc), Socket(Sock), Utils(Util)
 295         {
 296                 VersionString = "";
 297                 UserCount = OperCount = 0;
 298                 this->SetNextPingTime(time(NULL) + 60);
 299                 this->SetPingFlag();
 300
 301                 /* find the 'route' for this server (e.g. the one directly connected
 302                  * to the local server, which we can use to reach it)
 303                  *
 304                  * In the following example, consider we have just added a TreeServer
 305                  * class for server G on our network, of which we are server A.
 306                  * To route traffic to G (marked with a *) we must send the data to
 307                  * B (marked with a +) so this algorithm initializes the 'Route'
 308                  * value to point at whichever server traffic must be routed through
 309                  * to get here. If we were to try this algorithm with server B,
 310                  * the Route pointer would point at its own object ('this').
 311                  *
 312                  *              A
 313                  *             / \
 314                  *          + B   C
 315                  *           / \   \
 316                  *          D   E   F
 317                  *         /         \
 318                  *      * G           H
 319                  *
 320                  * We only run this algorithm when a server is created, as
 321                  * the routes remain constant while ever the server exists, and
 322                  * do not need to be re-calculated.
 323                  */
 324
 325                 Route = Above;
 326                 if (Route == Utils->TreeRoot)
 327                 {
 328                         Route = this;
 329                 }
 330                 else
 331                 {
 332                         while (this->Route->GetParent() != Utils->TreeRoot)
 333                         {
 334                                 this->Route = Route->GetParent();
 335                         }
 336                 }
 337
 338                 /* Because recursive code is slow and takes a lot of resources,
 339                  * we store two representations of the server tree. The first
 340                  * is a recursive structure where each server references its
 341                  * children and its parent, which is used for netbursts and
 342                  * netsplits to dump the whole dataset to the other server,
 343                  * and the second is used for very fast lookups when routing
 344                  * messages and is instead a hash_map, where each item can
 345                  * be referenced by its server name. The AddHashEntry()
 346                  * call below automatically inserts each TreeServer class
 347                  * into the hash_map as it is created. There is a similar
 348                  * maintainance call in the destructor to tidy up deleted
 349                  * servers.
 350                  */
 351
 352                 this->AddHashEntry();
 353         }
 354
 355         int QuitUsers(const std::string &reason)
 356         {
 357                 ServerInstance->Log(DEBUG,"Removing all users from server %s",this->ServerName.c_str());
 358                 const char* reason_s = reason.c_str();
 359                 std::vector<userrec*> time_to_die;
 360                 for (user_hash::iterator n = ServerInstance->clientlist->begin(); n != ServerInstance->clientlist->end(); n++)
 361                 {
 362                         if (!strcmp(n->second->server, this->ServerName.c_str()))
 363                         {
 364                                 time_to_die.push_back(n->second);
 365                         }
 366                 }
 367                 for (std::vector<userrec*>::iterator n = time_to_die.begin(); n != time_to_die.end(); n++)
 368                 {
 369                         userrec* a = (userrec*)*n;
 370                         ServerInstance->Log(DEBUG,"Kill %s fd=%d",a->nick,a->GetFd());
 371                         if (!IS_LOCAL(a))
 372                                 userrec::QuitUser(ServerInstance,a,reason_s);
 373                 }
 374                 return time_to_die.size();
 375         }
 376
 377         /** This method is used to add the structure to the
 378          * hash_map for linear searches. It is only called
 379          * by the constructors.
 380          */
 381         void AddHashEntry()
 382         {
 383                 server_hash::iterator iter = Utils->serverlist.find(this->ServerName.c_str());
 384                 if (iter == Utils->serverlist.end())
 385                         Utils->serverlist[this->ServerName.c_str()] = this;
 386         }
 387
 388         /** This method removes the reference to this object
 389          * from the hash_map which is used for linear searches.
 390          * It is only called by the default destructor.
 391          */
 392         void DelHashEntry()
 393         {
 394                 server_hash::iterator iter = Utils->serverlist.find(this->ServerName.c_str());
 395                 if (iter != Utils->serverlist.end())
 396                         Utils->serverlist.erase(iter);
 397         }
 398
 399         /** These accessors etc should be pretty self-
 400          * explanitory.
 401          */
 402         TreeServer* GetRoute()
 403         {
 404                 return Route;
 405         }
 406
 407         std::string GetName()
 408         {
 409                 return ServerName.c_str();
 410         }
 411
 412         std::string GetDesc()
 413         {
 414                 return ServerDesc;
 415         }
 416
 417         std::string GetVersion()
 418         {
 419                 return VersionString;
 420         }
 421
 422         void SetNextPingTime(time_t t)
 423         {
 424                 this->NextPing = t;
 425                 LastPingWasGood = false;
 426         }
 427
 428         time_t NextPingTime()
 429         {
 430                 return NextPing;
 431         }
 432
 433         bool AnsweredLastPing()
 434         {
 435                 return LastPingWasGood;
 436         }
 437
 438         void SetPingFlag()
 439         {
 440                 LastPingWasGood = true;
 441         }
 442
 443         int GetUserCount()
 444         {
 445                 return UserCount;
 446         }
 447
 448         void AddUserCount()
 449         {
 450                 UserCount++;
 451         }
 452
 453         void DelUserCount()
 454         {
 455                 UserCount--;
 456         }
 457
 458         int GetOperCount()
 459         {
 460                 return OperCount;
 461         }
 462
 463         TreeSocket* GetSocket()
 464         {
 465                 return Socket;
 466         }
 467
 468         TreeServer* GetParent()
 469         {
 470                 return Parent;
 471         }
 472
 473         void SetVersion(const std::string &Version)
 474         {
 475                 VersionString = Version;
 476         }
 477
 478         unsigned int ChildCount()
 479         {
 480                 return Children.size();
 481         }
 482
 483         TreeServer* GetChild(unsigned int n)
 484         {
 485                 if (n < Children.size())
 486                 {
 487                         /* Make sure they  cant request
 488                          * an out-of-range object. After
 489                          * all we know what these programmer
 490                          * types are like *grin*.
 491                          */
 492                         return Children[n];
 493                 }
 494                 else
 495                 {
 496                         return NULL;
 497                 }
 498         }
 499
 500         void AddChild(TreeServer* Child)
 501         {
 502                 Children.push_back(Child);
 503         }
 504
 505         bool DelChild(TreeServer* Child)
 506         {
 507                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 508                 {
 509                         if (*a == Child)
 510                         {
 511                                 Children.erase(a);
 512                                 return true;
 513                         }
 514                 }
 515                 return false;
 516         }
 517
 518         /** Removes child nodes of this node, and of that node, etc etc.
 519          * This is used during netsplits to automatically tidy up the
 520          * server tree. It is slow, we don't use it for much else.
 521          */
 522         bool Tidy()
 523         {
 524                 bool stillchildren = true;
 525                 while (stillchildren)
 526                 {
 527                         stillchildren = false;
 528                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 529                         {
 530                                 TreeServer* s = (TreeServer*)*a;
 531                                 s->Tidy();
 532                                 Children.erase(a);
 533                                 DELETE(s);
 534                                 stillchildren = true;
 535                                 break;
 536                         }
 537                 }
 538                 return true;
 539         }
 540
 541         ~TreeServer()
 542         {
 543                 /* We'd better tidy up after ourselves, eh? */
 544                 this->DelHashEntry();
 545         }
 546 };
 547
 548 /** Yay for fast searches!
 549  * This is hundreds of times faster than recursion
 550  * or even scanning a linked list, especially when
 551  * there are more than a few servers to deal with.
 552  * (read as: lots).
 553  */
 554 TreeServer* SpanningTreeUtilities::FindServer(const std::string &ServerName)
 555 {
 556         server_hash::iterator iter;
 557         iter = serverlist.find(ServerName.c_str());
 558         if (iter != serverlist.end())
 559         {
 560                 return iter->second;
 561         }
 562         else
 563         {
 564                 return NULL;
 565         }
 566 }
 567
 568 /** Returns the locally connected server we must route a
 569  * message through to reach server 'ServerName'. This
 570  * only applies to one-to-one and not one-to-many routing.
 571  * See the comments for the constructor of TreeServer
 572  * for more details.
 573  */
 574 TreeServer* SpanningTreeUtilities::BestRouteTo(const std::string &ServerName)
 575 {
 576         if (ServerName.c_str() == TreeRoot->GetName())
 577                 return NULL;
 578         TreeServer* Found = FindServer(ServerName);
 579         if (Found)
 580         {
 581                 return Found->GetRoute();
 582         }
 583         else
 584         {
 585                 return NULL;
 586         }
 587 }
 588
 589 /** Find the first server matching a given glob mask.
 590  * Theres no find-using-glob method of hash_map [awwww :-(]
 591  * so instead, we iterate over the list using an iterator
 592  * and match each one until we get a hit. Yes its slow,
 593  * deal with it.
 594  */
 595 TreeServer* SpanningTreeUtilities::FindServerMask(const std::string &ServerName)
 596 {
 597         for (server_hash::iterator i = serverlist.begin(); i != serverlist.end(); i++)
 598         {
 599                 if (match(i->first.c_str(),ServerName.c_str()))
 600                         return i->second;
 601         }
 602         return NULL;
 603 }
 604
 605 /* A convenient wrapper that returns true if a server exists */
 606 bool SpanningTreeUtilities::IsServer(const std::string &ServerName)
 607 {
 608         return (FindServer(ServerName) != NULL);
 609 }
 610
 611
 612 /** Handle /RCONNECT
 613  */
 614 class cmd_rconnect : public command_t
 615 {
 616         Module* Creator;
 617         SpanningTreeUtilities* Utils;
 618  public:
 619         cmd_rconnect (InspIRCd* Instance, Module* Callback, SpanningTreeUtilities* Util) : command_t(Instance, "RCONNECT", 'o', 2), Creator(Callback), Utils(Util)
 620         {
 621                 this->source = "m_spanningtree.so";
 622                 syntax = "<remote-server-mask> <servermask>";
 623         }
 624
 625         CmdResult Handle (const char** parameters, int pcnt, userrec *user)
 626         {
 627                 user->WriteServ("NOTICE %s :*** RCONNECT: Sending remote connect to \002%s\002 to connect server \002%s\002.",user->nick,parameters[0],parameters[1]);
 628                 /* Is this aimed at our server? */
 629                 if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameters[0]))
 630                 {
 631                         /* Yes, initiate the given connect */
 632                         ServerInstance->SNO->WriteToSnoMask('l',"Remote CONNECT from %s matching \002%s\002, connecting server \002%s\002",user->nick,parameters[0],parameters[1]);
 633                         const char* para[1];
 634                         para[0] = parameters[1];
 635                         std::string original_command = std::string("CONNECT ") + parameters[1];
 636                         Creator->OnPreCommand("CONNECT", para, 1, user, true, original_command);
 637
 638                         return CMD_SUCCESS;
 639                 }
 640
 641                 return CMD_FAILURE;
 642         }
 643 };
 644
 645
 646
 647 /** Every SERVER connection inbound or outbound is represented by
 648  * an object of type TreeSocket.
 649  * TreeSockets, being inherited from InspSocket, can be tied into
 650  * the core socket engine, and we cn therefore receive activity events
 651  * for them, just like activex objects on speed. (yes really, that
 652  * is a technical term!) Each of these which relates to a locally
 653  * connected server is assocated with it, by hooking it onto a
 654  * TreeSocket class using its constructor. In this way, we can
 655  * maintain a list of servers, some of which are directly connected,
 656  * some of which are not.
 657  */
 658 class TreeSocket : public InspSocket
 659 {
 660         SpanningTreeUtilities* Utils;
 661         std::string myhost;
 662         std::string in_buffer;
 663         ServerState LinkState;
 664         std::string InboundServerName;
 665         std::string InboundDescription;
 666         int num_lost_users;
 667         int num_lost_servers;
 668         time_t NextPing;
 669         bool LastPingWasGood;
 670         bool bursting;
 671         unsigned int keylength;
 672         std::string ModuleList;
 673         std::map<std::string,std::string> CapKeys;
 674         Module* Hook;
 675
 676  public:
 677
 678         /** Because most of the I/O gubbins are encapsulated within
 679          * InspSocket, we just call the superclass constructor for
 680          * most of the action, and append a few of our own values
 681          * to it.
 682          */
 683         TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, Module* HookMod = NULL)
 684                 : InspSocket(SI, host, port, listening, maxtime), Utils(Util), Hook(HookMod)
 685         {
 686                 myhost = host;
 687                 this->LinkState = LISTENER;
 688
 689                 Instance->Log(DEBUG, "HOOK = %08x", Hook);
 690
 691                 if (listening && Hook)
 692                         InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
 693         }
 694
 695         TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName, Module* HookMod = NULL)
 696                 : InspSocket(SI, host, port, listening, maxtime), Utils(Util), Hook(HookMod)
 697         {
 698                 myhost = ServerName;
 699                 this->LinkState = CONNECTING;
 700
 701                 if (Hook)
 702                         InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
 703         }
 704
 705         /** When a listening socket gives us a new file descriptor,
 706          * we must associate it with a socket without creating a new
 707          * connection. This constructor is used for this purpose.
 708          */
 709         TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, int newfd, char* ip, Module* HookMod = NULL)
 710                 : InspSocket(SI, newfd, ip), Utils(Util), Hook(HookMod)
 711         {
 712                 this->LinkState = WAIT_AUTH_1;
 713
 714                 /* If we have a transport module hooked to the parent, hook the same module to this
 715                  * socket, and set a timer waiting for handshake before we send CAPAB etc.
 716                  */
 717                 if (Hook)
 718                 {
 719                         InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
 720                         Instance->Timers->AddTimer(new HandshakeTimer(Instance, this, &(Utils->LinkBlocks[0]), this->Utils));
 721                 }
 722                 else
 723                 {
 724                         /* Otherwise, theres no lower layer transport in plain TCP/IP,
 725                          * so just send the capabilities right now.
 726                          */
 727                         this->SendCapabilities();
 728                 }
 729         }
 730
 731         ServerState GetLinkState()
 732         {
 733                 return this->LinkState;
 734         }
 735
 736         Module* GetHook()
 737         {
 738                 return this->Hook;
 739         }
 740
 741         ~TreeSocket()
 742         {
 743                 if (Hook)
 744                         InspSocketUnhookRequest(this, (Module*)Utils->Creator, Hook).Send();
 745         }
 746
 747         /** When an outbound connection finishes connecting, we receive
 748          * this event, and must send our SERVER string to the other
 749          * side. If the other side is happy, as outlined in the server
 750          * to server docs on the inspircd.org site, the other side
 751          * will then send back its own server string.
 752          */
 753         virtual bool OnConnected()
 754         {
 755                 if (this->LinkState == CONNECTING)
 756                 {
 757                         /* we do not need to change state here. */
 758                         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 759                         {
 760                                 if (x->Name == this->myhost)
 761                                 {
 762                                         this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] started.");
 763
 764                                         if (Hook)
 765                                         {
 766                                                 InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
 767                                                 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] using transport \2"+x->Hook+"\2");
 768                                         }
 769                                         else
 770                                                 this->SendCapabilities();
 771
 772                                         /* found who we're supposed to be connecting to, send the neccessary gubbins. */
 773                                         if (Hook)
 774                                                 Instance->Timers->AddTimer(new HandshakeTimer(Instance, this, &(*x), this->Utils));
 775                                         else
 776                                                 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
 777
 778                                         return true;
 779                                 }
 780                         }
 781                 }
 782                 /* There is a (remote) chance that between the /CONNECT and the connection
 783                  * being accepted, some muppet has removed the <link> block and rehashed.
 784                  * If that happens the connection hangs here until it's closed. Unlikely
 785                  * and rather harmless.
 786                  */
 787                 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2 lost link tag(!)");
 788                 return true;
 789         }
 790
 791         virtual void OnError(InspSocketError e)
 792         {
 793                 /* We don't handle this method, because all our
 794                  * dirty work is done in OnClose() (see below)
 795                  * which is still called on error conditions too.
 796                  */
 797                 if (e == I_ERR_CONNECT)
 798                 {
 799                         this->Instance->SNO->WriteToSnoMask('l',"Connection failed: Connection to \002"+myhost+"\002 refused");
 800                         Link* MyLink = Utils->FindLink(myhost);
 801                         if (MyLink)
 802                                 Utils->DoFailOver(MyLink);
 803                 }
 804         }
 805
 806         virtual int OnDisconnect()
 807         {
 808                 /* For the same reason as above, we don't
 809                  * handle OnDisconnect()
 810                  */
 811                 return true;
 812         }
 813
 814         /** Recursively send the server tree with distances as hops.
 815          * This is used during network burst to inform the other server
 816          * (and any of ITS servers too) of what servers we know about.
 817          * If at any point any of these servers already exist on the other
 818          * end, our connection may be terminated. The hopcounts given
 819          * by this function are relative, this doesn't matter so long as
 820          * they are all >1, as all the remote servers re-calculate them
 821          * to be relative too, with themselves as hop 0.
 822          */
 823         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 824         {
 825                 char command[1024];
 826                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 827                 {
 828                         TreeServer* recursive_server = Current->GetChild(q);
 829                         if (recursive_server != s)
 830                         {
 831                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 832                                 this->WriteLine(command);
 833                                 this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
 834                                 /* down to next level */
 835                                 this->SendServers(recursive_server, s, hops+1);
 836                         }
 837                 }
 838         }
 839
 840         std::string MyCapabilities()
 841         {
 842                 std::vector<std::string> modlist;
 843                 std::string capabilities = "";
 844
 845                 for (int i = 0; i <= this->Instance->GetModuleCount(); i++)
 846                 {
 847                         if (this->Instance->modules[i]->GetVersion().Flags & VF_COMMON)
 848                                 modlist.push_back(this->Instance->Config->module_names[i]);
 849                 }
 850                 sort(modlist.begin(),modlist.end());
 851                 for (unsigned int i = 0; i < modlist.size(); i++)
 852                 {
 853                         if (i)
 854                                 capabilities = capabilities + ",";
 855                         capabilities = capabilities + modlist[i];
 856                 }
 857                 return capabilities;
 858         }
 859
 860         void SendCapabilities()
 861         {
 862                 irc::commasepstream modulelist(MyCapabilities());
 863
 864                 this->WriteLine("CAPAB START");
 865
 866                 /* Send module names, split at 509 length */
 867                 std::string item = "*";
 868                 std::string line = "CAPAB MODULES ";
 869                 while ((item = modulelist.GetToken()) != "")
 870                 {
 871                         if (line.length() + item.length() + 1 > 509)
 872                         {
 873                                 this->WriteLine(line);
 874                                 line = "CAPAB MODULES ";
 875                         }
 876
 877                         if (line != "CAPAB MODULES ")
 878                                 line.append(",");
 879
 880                         line.append(item);
 881                 }
 882                 if (line != "CAPAB MODULES ")
 883                         this->WriteLine(line);
 884
 885                 int ip6 = 0;
 886                 int ip6support = 0;
 887 #ifdef IPV6
 888                 ip6 = 1;
 889 #endif
 890 #ifdef SUPPORT_IP6LINKS
 891                 ip6support = 1;
 892 #endif
 893                 this->WriteLine("CAPAB CAPABILITIES :NICKMAX="+ConvToStr(NICKMAX)+" HALFOP="+ConvToStr(this->Instance->Config->AllowHalfop)+" CHANMAX="+ConvToStr(CHANMAX)+" MAXMODES="+ConvToStr(MAXMODES)+" IDENTMAX="+ConvToStr(IDENTMAX)+" MAXQUIT="+ConvToStr(MAXQUIT)+" MAXTOPIC="+ConvToStr(MAXTOPIC)+" MAXKICK="+ConvToStr(MAXKICK)+" MAXGECOS="+ConvToStr(MAXGECOS)+" MAXAWAY="+ConvToStr(MAXAWAY)+" IP6NATIVE="+ConvToStr(ip6)+" IP6SUPPORT="+ConvToStr(ip6support)+" PROTOCOL="+ConvToStr(ProtocolVersion));
 894
 895                 this->WriteLine("CAPAB END");
 896         }
 897
 898         /* Check a comma seperated list for an item */
 899         bool HasItem(const std::string &list, const std::string &item)
 900         {
 901                 irc::commasepstream seplist(list);
 902
 903                 std::string item2 = "*";
 904                 while ((item2 = seplist.GetToken()) != "")
 905                 {
 906                         if (item2 == item)
 907                                 return true;
 908                 }
 909
 910                 return false;
 911         }
 912
 913         /* Isolate and return the elements that are different between two comma seperated lists */
 914         std::string ListDifference(const std::string &one, const std::string &two)
 915         {
 916                 irc::commasepstream list_one(one);
 917                 std::string item = "*";
 918                 std::string result = "";
 919                 while ((item = list_one.GetToken()) != "")
 920                 {
 921                         if (!HasItem(two, item))
 922                         {
 923                                 result.append(" ");
 924                                 result.append(item);
 925                         }
 926                 }
 927                 return result;
 928         }
 929
 930         bool Capab(const std::deque<std::string> &params)
 931         {
 932                 if (params.size() < 1)
 933                 {
 934                         this->WriteLine("ERROR :Invalid number of parameters for CAPAB - Mismatched version");
 935                         return false;
 936                 }
 937
 938                 if (params[0] == "START")
 939                 {
 940                         this->ModuleList = "";
 941                         this->CapKeys.clear();
 942                 }
 943                 else if (params[0] == "END")
 944                 {
 945                         std::string reason = "";
 946                         int ip6support = 0;
 947 #ifdef SUPPORT_IP6LINKS
 948                         ip6support = 1;
 949 #endif
 950                         /* Compare ModuleList and check CapKeys...
 951                          * Maybe this could be tidier? -- Brain
 952                          */
 953                         if ((this->ModuleList != this->MyCapabilities()) && (this->ModuleList.length()))
 954                         {
 955                                 std::string diff = ListDifference(this->ModuleList, this->MyCapabilities());
 956                                 if (!diff.length())
 957                                 {
 958                                         diff = "your server:" + ListDifference(this->MyCapabilities(), this->ModuleList);
 959                                 }
 960                                 else
 961                                 {
 962                                         diff = "this server:" + diff;
 963                                 }
 964                                 if (diff.length() == 12)
 965                                         reason = "Module list in CAPAB is not alphabetically ordered, cannot compare lists.";
 966                                 else
 967                                         reason = "Modules loaded on these servers are not correctly matched, these modules are not loaded on " + diff;
 968                         }
 969
 970                         if (((this->CapKeys.find("IP6SUPPORT") == this->CapKeys.end()) && (ip6support)) || ((this->CapKeys.find("IP6SUPPORT") != this->CapKeys.end()) && (this->CapKeys.find("IP6SUPPORT")->second != ConvToStr(ip6support))))
 971                                 reason = "We don't both support linking to IPV6 servers";
 972
 973                         if (((this->CapKeys.find("IP6NATIVE") != this->CapKeys.end()) && (this->CapKeys.find("IP6NATIVE")->second == "1")) && (!ip6support))
 974                                 reason = "The remote server is IPV6 native, and we don't support linking to IPV6 servers";
 975
 976                         if (((this->CapKeys.find("NICKMAX") == this->CapKeys.end()) || ((this->CapKeys.find("NICKMAX") != this->CapKeys.end()) && (this->CapKeys.find("NICKMAX")->second != ConvToStr(NICKMAX)))))
 977                                 reason = "Maximum nickname lengths differ or remote nickname length not specified";
 978
 979                         if (((this->CapKeys.find("PROTOCOL") == this->CapKeys.end()) || ((this->CapKeys.find("PROTOCOL") != this->CapKeys.end()) && (this->CapKeys.find("PROTOCOL")->second != ConvToStr(ProtocolVersion)))))
 980                         {
 981                                 if (this->CapKeys.find("PROTOCOL") != this->CapKeys.end())
 982                                 {
 983                                         reason = "Mismatched protocol versions "+this->CapKeys.find("PROTOCOL")->second+" and "+ConvToStr(ProtocolVersion);
 984                                 }
 985                                 else
 986                                 {
 987                                         reason = "Protocol version not specified";
 988                                 }
 989                         }
 990
 991                         if (((this->CapKeys.find("HALFOP") == this->CapKeys.end()) && (Instance->Config->AllowHalfop)) || ((this->CapKeys.find("HALFOP") != this->CapKeys.end()) && (this->CapKeys.find("HALFOP")->second != ConvToStr(Instance->Config->AllowHalfop))))
 992                                 reason = "We don't both have halfop support enabled/disabled identically";
 993
 994                         if (((this->CapKeys.find("IDENTMAX") == this->CapKeys.end()) || ((this->CapKeys.find("IDENTMAX") != this->CapKeys.end()) && (this->CapKeys.find("IDENTMAX")->second != ConvToStr(IDENTMAX)))))
 995                                 reason = "Maximum ident lengths differ or remote ident length not specified";
 996
 997                         if (((this->CapKeys.find("CHANMAX") == this->CapKeys.end()) || ((this->CapKeys.find("CHANMAX") != this->CapKeys.end()) && (this->CapKeys.find("CHANMAX")->second != ConvToStr(CHANMAX)))))
 998                                 reason = "Maximum channel lengths differ or remote channel length not specified";
 999
1000                         if (((this->CapKeys.find("MAXMODES") == this->CapKeys.end()) || ((this->CapKeys.find("MAXMODES") != this->CapKeys.end()) && (this->CapKeys.find("MAXMODES")->second != ConvToStr(MAXMODES)))))
1001                                 reason = "Maximum modes per line differ or remote modes per line not specified";
1002
1003                         if (((this->CapKeys.find("MAXQUIT") == this->CapKeys.end()) || ((this->CapKeys.find("MAXQUIT") != this->CapKeys.end()) && (this->CapKeys.find("MAXQUIT")->second != ConvToStr(MAXQUIT)))))
1004                                 reason = "Maximum quit lengths differ or remote quit length not specified";
1005
1006                         if (((this->CapKeys.find("MAXTOPIC") == this->CapKeys.end()) || ((this->CapKeys.find("MAXTOPIC") != this->CapKeys.end()) && (this->CapKeys.find("MAXTOPIC")->second != ConvToStr(MAXTOPIC)))))
1007                                 reason = "Maximum topic lengths differ or remote topic length not specified";
1008
1009                         if (((this->CapKeys.find("MAXKICK") == this->CapKeys.end()) || ((this->CapKeys.find("MAXKICK") != this->CapKeys.end()) && (this->CapKeys.find("MAXKICK")->second != ConvToStr(MAXKICK)))))
1010                                 reason = "Maximum kick lengths differ or remote kick length not specified";
1011
1012                         if (((this->CapKeys.find("MAXGECOS") == this->CapKeys.end()) || ((this->CapKeys.find("MAXGECOS") != this->CapKeys.end()) && (this->CapKeys.find("MAXGECOS")->second != ConvToStr(MAXGECOS)))))
1013                                 reason = "Maximum GECOS (fullname) lengths differ or remote GECOS length not specified";
1014
1015                         if (((this->CapKeys.find("MAXAWAY") == this->CapKeys.end()) || ((this->CapKeys.find("MAXAWAY") != this->CapKeys.end()) && (this->CapKeys.find("MAXAWAY")->second != ConvToStr(MAXAWAY)))))
1016                                 reason = "Maximum awaymessage lengths differ or remote awaymessage length not specified";
1017
1018                         if (reason.length())
1019                         {
1020                                 this->WriteLine("ERROR :CAPAB negotiation failed: "+reason);
1021                                 return false;
1022                         }
1023                 }
1024                 else if ((params[0] == "MODULES") && (params.size() == 2))
1025                 {
1026                         if (!this->ModuleList.length())
1027                         {
1028                                 this->ModuleList.append(params[1]);
1029                         }
1030                         else
1031                         {
1032                                 this->ModuleList.append(",");
1033                                 this->ModuleList.append(params[1]);
1034                         }
1035                 }
1036                 else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
1037                 {
1038                         irc::tokenstream capabs(params[1]);
1039                         std::string item = "*";
1040                         while ((item = capabs.GetToken()) != "")
1041                         {
1042                                 /* Process each key/value pair */
1043                                 std::string::size_type equals = item.rfind('=');
1044                                 if (equals != std::string::npos)
1045                                 {
1046                                         std::string var = item.substr(0, equals);
1047                                         std::string value = item.substr(equals+1, item.length());
1048                                         this->Instance->Log(DEBUG,"Key='%s' Value='%s'",var.c_str(),value.c_str());
1049                                         CapKeys[var] = value;
1050                                 }
1051                         }
1052                 }
1053
1054                 return true;
1055         }
1056
1057         /** This function forces this server to quit, removing this server
1058          * and any users on it (and servers and users below that, etc etc).
1059          * It's very slow and pretty clunky, but luckily unless your network
1060          * is having a REAL bad hair day, this function shouldnt be called
1061          * too many times a month ;-)
1062          */
1063         void SquitServer(std::string &from, TreeServer* Current)
1064         {
1065                 /* recursively squit the servers attached to 'Current'.
1066                  * We're going backwards so we don't remove users
1067                  * while we still need them ;)
1068                  */
1069                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1070                 {
1071                         TreeServer* recursive_server = Current->GetChild(q);
1072                         this->SquitServer(from,recursive_server);
1073                 }
1074                 /* Now we've whacked the kids, whack self */
1075                 num_lost_servers++;
1076                 num_lost_users += Current->QuitUsers(from);
1077         }
1078
1079         /** This is a wrapper function for SquitServer above, which
1080          * does some validation first and passes on the SQUIT to all
1081          * other remaining servers.
1082          */
1083         void Squit(TreeServer* Current, const std::string &reason)
1084         {
1085                 if ((Current) && (Current != Utils->TreeRoot))
1086                 {
1087                         Event rmode((char*)Current->GetName().c_str(), (Module*)Utils->Creator, "lost_server");
1088                         rmode.Send(Instance);
1089
1090                         std::deque<std::string> params;
1091                         params.push_back(Current->GetName());
1092                         params.push_back(":"+reason);
1093                         Utils->DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
1094                         if (Current->GetParent() == Utils->TreeRoot)
1095                         {
1096                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
1097                         }
1098                         else
1099                         {
1100                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
1101                         }
1102                         num_lost_servers = 0;
1103                         num_lost_users = 0;
1104                         std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
1105                         SquitServer(from, Current);
1106                         Current->Tidy();
1107                         Current->GetParent()->DelChild(Current);
1108                         DELETE(Current);
1109                         this->Instance->WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
1110                 }
1111                 else
1112                 {
1113                         Instance->Log(DEFAULT,"Squit from unknown server");
1114                 }
1115         }
1116
1117         /** FMODE command - server mode with timestamp checks */
1118         bool ForceMode(const std::string &source, std::deque<std::string> &params)
1119         {
1120                 /* Chances are this is a 1.0 FMODE without TS */
1121                 if (params.size() < 3)
1122                 {
1123                         /* No modes were in the command, probably a channel with no modes set on it */
1124                         return true;
1125                 }
1126
1127                 bool smode = false;
1128                 std::string sourceserv;
1129
1130                 /* Are we dealing with an FMODE from a user, or from a server? */
1131                 userrec* who = this->Instance->FindNick(source);
1132                 if (who)
1133                 {
1134                         /* FMODE from a user, set sourceserv to the users server name */
1135                         sourceserv = who->server;
1136                 }
1137                 else
1138                 {
1139                         /* FMODE from a server, create a fake user to receive mode feedback */
1140                         who = new userrec(this->Instance);
1141                         who->SetFd(FD_MAGIC_NUMBER);
1142                         smode = true;           /* Setting this flag tells us we should free the userrec later */
1143                         sourceserv = source;    /* Set sourceserv to the actual source string */
1144                 }
1145                 const char* modelist[64];
1146                 time_t TS = 0;
1147                 int n = 0;
1148                 memset(&modelist,0,sizeof(modelist));
1149                 for (unsigned int q = 0; (q < params.size()) && (q < 64); q++)
1150                 {
1151                         if (q == 1)
1152                         {
1153                                 /* The timestamp is in this position.
1154                                  * We don't want to pass that up to the
1155                                  * server->client protocol!
1156                                  */
1157                                 TS = atoi(params[q].c_str());
1158                         }
1159                         else
1160                         {
1161                                 /* Everything else is fine to append to the modelist */
1162                                 modelist[n++] = params[q].c_str();
1163                         }
1164
1165                 }
1166                 /* Extract the TS value of the object, either userrec or chanrec */
1167                 userrec* dst = this->Instance->FindNick(params[0]);
1168                 chanrec* chan = NULL;
1169                 time_t ourTS = 0;
1170                 if (dst)
1171                 {
1172                         ourTS = dst->age;
1173                 }
1174                 else
1175                 {
1176                         chan = this->Instance->FindChan(params[0]);
1177                         if (chan)
1178                         {
1179                                 ourTS = chan->age;
1180                         }
1181                         else
1182                                 /* Oops, channel doesnt exist! */
1183                                 return true;
1184                 }
1185
1186                 /* TS is equal: Merge the mode changes, use voooodoooooo on modes
1187                  * with parameters.
1188                  */
1189                 if (TS == ourTS)
1190                 {
1191                         Instance->Log(DEBUG,"Entering TS equality check");
1192                         ModeHandler* mh = NULL;
1193                         unsigned long paramptr = 3;
1194                         std::string to_bounce = "";
1195                         std::string to_keep = "";
1196                         std::vector<std::string> params_to_keep;
1197                         std::string params_to_bounce = "";
1198                         bool adding = true;
1199                         char cur_change = 1;
1200                         char old_change = 0;
1201                         char old_bounce_change = 0;
1202                         /* Merge modes, basically do special stuff to mode with params */
1203                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1204                         {
1205                                 switch (*x)
1206                                 {
1207                                         case '-':
1208                                                 adding = false;
1209                                         break;
1210                                         case '+':
1211                                                 adding = true;
1212                                         break;
1213                                         default:
1214                                                 if (adding)
1215                                                 {
1216                                                         /* We only care about whats being set,
1217                                                          * not whats being unset
1218                                                          */
1219                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1220
1221                                                         if ((mh) && (mh->GetNumParams(adding) > 0) && (!mh->IsListMode()))
1222                                                         {
1223                                                                 /* We only want to do special things to
1224                                                                  * modes with parameters, we are going to rewrite
1225                                                                  * those parameters
1226                                                                  */
1227                                                                 ModePair ret;
1228                                                                 adding ? cur_change = '+' : cur_change = '-';
1229
1230                                                                 ret = mh->ModeSet(smode ? NULL : who, dst, chan, params[paramptr]);
1231
1232                                                                 /* The mode is set here, check which we should keep */
1233                                                                 if (ret.first)
1234                                                                 {
1235                                                                         bool which_to_keep = mh->CheckTimeStamp(TS, ourTS, params[paramptr], ret.second, chan);
1236
1237                                                                         if (which_to_keep == true)
1238                                                                         {
1239                                                                                 /* Keep ours, bounce theirs:
1240                                                                                  * Send back ours to them and
1241                                                                                  * drop their mode changs
1242                                                                                  */
1243                                                                                 adding ? cur_change = '+' : cur_change = '-';
1244                                                                                 if (cur_change != old_bounce_change)
1245                                                                                         to_bounce += cur_change;
1246                                                                                 to_bounce += *x;
1247                                                                                 old_bounce_change = cur_change;
1248
1249                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1250                                                                                         params_to_bounce.append(" ").append(ret.second);
1251                                                                         }
1252                                                                         else
1253                                                                         {
1254                                                                                 /* Keep theirs: Accept their mode change,
1255                                                                                  * do nothing else
1256                                                                                  */
1257                                                                                 adding ? cur_change = '+' : cur_change = '-';
1258                                                                                 if (cur_change != old_change)
1259                                                                                         to_keep += cur_change;
1260                                                                                 to_keep += *x;
1261                                                                                 old_change = cur_change;
1262
1263                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1264                                                                                         params_to_keep.push_back(params[paramptr]);
1265                                                                         }
1266                                                                 }
1267                                                                 else
1268                                                                 {
1269                                                                         /* Mode isnt set here, we want it */
1270                                                                         adding ? cur_change = '+' : cur_change = '-';
1271                                                                         if (cur_change != old_change)
1272                                                                                 to_keep += cur_change;
1273                                                                         to_keep += *x;
1274                                                                         old_change = cur_change;
1275
1276                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1277                                                                                 params_to_keep.push_back(params[paramptr]);
1278                                                                 }
1279
1280                                                                 paramptr++;
1281                                                         }
1282                                                         else
1283                                                         {
1284                                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1285
1286                                                                 if (mh)
1287                                                                 {
1288                                                                         adding ? cur_change = '+' : cur_change = '-';
1289
1290                                                                         /* Just keep this, safe to merge with no checks
1291                                                                          * it has no parameters
1292                                                                          */
1293
1294                                                                         if (cur_change != old_change)
1295                                                                                 to_keep += cur_change;
1296                                                                         to_keep += *x;
1297                                                                         old_change = cur_change;
1298
1299                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1300                                                                         {
1301                                                                                 Instance->Log(DEBUG,"Mode removal %d %d",adding, mh->GetNumParams(adding));
1302                                                                                 params_to_keep.push_back(params[paramptr++]);
1303                                                                         }
1304                                                                 }
1305                                                         }
1306                                                 }
1307                                                 else
1308                                                 {
1309                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1310
1311                                                         if (mh)
1312                                                         {
1313                                                                 /* Taking a mode away */
1314                                                                 adding ? cur_change = '+' : cur_change = '-';
1315
1316                                                                 if (cur_change != old_change)
1317                                                                         to_keep += cur_change;
1318                                                                 to_keep += *x;
1319                                                                 old_change = cur_change;
1320
1321                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1322                                                                         params_to_keep.push_back(params[paramptr++]);
1323                                                         }
1324                                                 }
1325                                         break;
1326                                 }
1327                         }
1328
1329                         if (to_bounce.length())
1330                         {
1331                                 std::deque<std::string> newparams;
1332                                 newparams.push_back(params[0]);
1333                                 newparams.push_back(ConvToStr(ourTS));
1334                                 newparams.push_back(to_bounce+params_to_bounce);
1335                                 Instance->Log(DEBUG,"BOUNCE BACK: %s",(to_bounce+params_to_bounce).c_str());
1336                                 Utils->DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1337                         }
1338
1339                         if (to_keep.length())
1340                         {
1341                                 unsigned int n = 2;
1342                                 unsigned int q = 0;
1343                                 modelist[0] = params[0].c_str();
1344                                 modelist[1] = to_keep.c_str();
1345
1346                                 if (params_to_keep.size() > 0)
1347                                 {
1348                                         for (q = 0; (q < params_to_keep.size()) && (q < 64); q++)
1349                                         {
1350                                                 Instance->Log(DEBUG,"KEEP Item %d of %d: %s", q, params_to_keep.size(), params_to_keep[q].c_str());
1351                                                 modelist[n++] = params_to_keep[q].c_str();
1352                                         }
1353                                 }
1354
1355                                 if (smode)
1356                                 {
1357                                         Instance->Log(DEBUG,"Send mode");
1358                                         this->Instance->SendMode(modelist, n, who);
1359                                 }
1360                                 else
1361                                 {
1362                                         Instance->Log(DEBUG,"Send mode client");
1363                                         this->Instance->CallCommandHandler("MODE", modelist, n, who);
1364                                 }
1365
1366                                 /* HOT POTATO! PASS IT ON! */
1367                                 Utils->DoOneToAllButSender(source,"FMODE",params,sourceserv);
1368                         }
1369                 }
1370                 else
1371                 /* U-lined servers always win regardless of their TS */
1372                 if ((TS > ourTS) && (!this->Instance->ULine(source.c_str())))
1373                 {
1374                         /* Bounce the mode back to its sender.* We use our lower TS, so the other end
1375                          * SHOULD accept it, if its clock is right.
1376                          *
1377                          * NOTE: We should check that we arent bouncing anything thats already set at this end.
1378                          * If we are, bounce +ourmode to 'reinforce' it. This prevents desyncs.
1379                          * e.g. They send +l 50, we have +l 10 set. rather than bounce -l 50, we bounce +l 10.
1380                          *
1381                          * Thanks to jilles for pointing out this one-hell-of-an-issue before i even finished
1382                          * writing the code. It took me a while to come up with this solution.
1383                          *
1384                          * XXX: BE SURE YOU UNDERSTAND THIS CODE FULLY BEFORE YOU MESS WITH IT.
1385                          */
1386
1387                         std::deque<std::string> newparams;      /* New parameter list we send back */
1388                         newparams.push_back(params[0]);         /* Target, user or channel */
1389                         newparams.push_back(ConvToStr(ourTS));  /* Timestamp value of the target */
1390                         newparams.push_back("");                /* This contains the mode string. For now
1391                                                                  * it's empty, we fill it below.
1392                                                                  */
1393
1394                         /* Intelligent mode bouncing. Don't just invert, reinforce any modes which are already
1395                          * set to avoid a desync here.
1396                          */
1397                         std::string modebounce = "";
1398                         bool adding = true;
1399                         unsigned int t = 3;
1400                         ModeHandler* mh = NULL;
1401                         char cur_change = 1;
1402                         char old_change = 0;
1403                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1404                         {
1405                                 /* Iterate over all mode chars in the sent set */
1406                                 switch (*x)
1407                                 {
1408                                         /* Adding or subtracting modes? */
1409                                         case '-':
1410                                                 adding = false;
1411                                         break;
1412                                         case '+':
1413                                                 adding = true;
1414                                         break;
1415                                         default:
1416                                                 /* Find the mode handler for this mode */
1417                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1418
1419                                                 /* Got a mode handler?
1420                                                  * This also prevents us bouncing modes we have no handler for.
1421                                                  */
1422                                                 if (mh)
1423                                                 {
1424                                                         ModePair ret;
1425                                                         std::string p = "";
1426
1427                                                         /* Does the mode require a parameter right now?
1428                                                          * If it does, fetch it if we can
1429                                                          */
1430                                                         if ((mh->GetNumParams(adding) > 0) && (t < params.size()))
1431                                                                 p = params[t++];
1432
1433                                                         /* Call the ModeSet method to determine if its set with the
1434                                                          * given parameter here or not.
1435                                                          */
1436                                                         ret = mh->ModeSet(smode ? NULL : who, dst, chan, p);
1437
1438                                                         /* XXX: Really. Dont ask.
1439                                                          * Determine from if its set combined with what the current
1440                                                          * 'state' is (adding or not) as to wether we should 'invert'
1441                                                          * or 'reinforce' the mode change
1442                                                          */
1443                                                         (!ret.first ? (adding ? cur_change = '-' : cur_change = '+') : (!adding ? cur_change = '-' : cur_change = '+'));
1444
1445                                                         /* Quickly determine if we have 'flipped' from + to -,
1446                                                          * or - to +, to prevent unneccessary +/- chars in the
1447                                                          * output string that waste bandwidth
1448                                                          */
1449                                                         if (cur_change != old_change)
1450                                                                 modebounce += cur_change;
1451                                                         old_change = cur_change;
1452
1453                                                         /* Add the mode character to the output string */
1454                                                         modebounce += mh->GetModeChar();
1455
1456                                                         /* We got a parameter back from ModeHandler::ModeSet,
1457                                                          * are we supposed to be sending one out right now?
1458                                                          */
1459                                                         if (ret.second.length())
1460                                                         {
1461                                                                 if (mh->GetNumParams(cur_change == '+') > 0)
1462                                                                         /* Yes we're supposed to be sending out
1463                                                                          * the parameter. Make sure it goes
1464                                                                          */
1465                                                                         newparams.push_back(ret.second);
1466                                                         }
1467
1468                                                 }
1469                                         break;
1470                                 }
1471                         }
1472
1473                         /* Update the parameters for FMODE with the new 'bounced' string */
1474                         newparams[2] = modebounce;
1475                         /* Only send it back the way it came, no need to send it anywhere else */
1476                         Utils->DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1477                         Instance->Log(DEBUG,"FMODE bounced intelligently, our TS less than theirs and the other server is NOT a uline.");
1478                 }
1479                 else
1480                 {
1481                         Instance->Log(DEBUG,"Allow modes, TS lower for sender");
1482                         /* The server was ulined, but something iffy is up with the TS.
1483                          * Sound the alarm bells!
1484                          */
1485                         if ((this->Instance->ULine(sourceserv.c_str())) && (TS > ourTS))
1486                         {
1487                                 this->Instance->WriteOpers("\2WARNING!\2 U-Lined server '%s' has bad TS for '%s' (accepted change): \2SYNC YOUR CLOCKS\2 to avoid this notice",sourceserv.c_str(),params[0].c_str());
1488                         }
1489                         /* Allow the mode, route it to either server or user command handling */
1490                         if (smode)
1491                                 this->Instance->SendMode(modelist,n,who);
1492                         else
1493                                 this->Instance->CallCommandHandler("MODE", modelist, n, who);
1494
1495                         /* HOT POTATO! PASS IT ON! */
1496                         Utils->DoOneToAllButSender(source,"FMODE",params,sourceserv);
1497                 }
1498                 /* Are we supposed to free the userrec? */
1499                 if (smode)
1500                         DELETE(who);
1501
1502                 return true;
1503         }
1504
1505         /** FTOPIC command */
1506         bool ForceTopic(const std::string &source, std::deque<std::string> &params)
1507         {
1508                 if (params.size() != 4)
1509                         return true;
1510                 time_t ts = atoi(params[1].c_str());
1511                 std::string nsource = source;
1512
1513                 chanrec* c = this->Instance->FindChan(params[0]);
1514                 if (c)
1515                 {
1516                         if ((ts >= c->topicset) || (!*c->topic))
1517                         {
1518                                 std::string oldtopic = c->topic;
1519                                 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
1520                                 strlcpy(c->setby,params[2].c_str(),NICKMAX-1);
1521                                 c->topicset = ts;
1522                                 /* if the topic text is the same as the current topic,
1523                                  * dont bother to send the TOPIC command out, just silently
1524                                  * update the set time and set nick.
1525                                  */
1526                                 if (oldtopic != params[3])
1527                                 {
1528                                         userrec* user = this->Instance->FindNick(source);
1529                                         if (!user)
1530                                         {
1531                                                 c->WriteChannelWithServ(source.c_str(), "TOPIC %s :%s", c->name, c->topic);
1532                                         }
1533                                         else
1534                                         {
1535                                                 c->WriteChannel(user, "TOPIC %s :%s", c->name, c->topic);
1536                                                 nsource = user->server;
1537                                         }
1538                                         /* all done, send it on its way */
1539                                         params[3] = ":" + params[3];
1540                                         Utils->DoOneToAllButSender(source,"FTOPIC",params,nsource);
1541                                 }
1542                         }
1543
1544                 }
1545
1546                 return true;
1547         }
1548
1549         /** FJOIN, similar to TS6 SJOIN, but not quite. */
1550         bool ForceJoin(const std::string &source, std::deque<std::string> &params)
1551         {
1552                 /* 1.1 FJOIN works as follows:
1553                  *
1554                  * Each FJOIN is sent along with a timestamp, and the side with the lowest
1555                  * timestamp 'wins'. From this point on we will refer to this side as the
1556                  * winner. The side with the higher timestamp loses, from this point on we
1557                  * will call this side the loser or losing side. This should be familiar to
1558                  * anyone who's dealt with dreamforge or TS6 before.
1559                  *
1560                  * When two sides of a split heal and this occurs, the following things
1561                  * will happen:
1562                  *
1563                  * If the timestamps are exactly equal, both sides merge their privilages
1564                  * and users, as in InspIRCd 1.0 and ircd2.8. The channels have not been
1565                  * re-created during a split, this is safe to do.
1566                  *
1567                  *
1568                  * If the timestamps are NOT equal, the losing side removes all privilage
1569                  * modes from all of its users that currently exist in the channel, before
1570                  * introducing new users into the channel which are listed in the FJOIN
1571                  * command's parameters. This means, all modes +ohv, and privilages added
1572                  * by modules, such as +qa. The losing side then LOWERS its timestamp value
1573                  * of the channel to match that of the winning side, and the modes of the
1574                  * users of the winning side are merged in with the losing side. The loser
1575                  * then sends out a set of FMODE commands which 'confirm' that it just
1576                  * removed all privilage modes from its existing users, which allows for
1577                  * services packages to still work correctly without needing to know the
1578                  * timestamping rules which InspIRCd follows. In TS6 servers this is always
1579                  * a problem, and services packages must contain code which explicitly
1580                  * behaves as TS6 does, removing ops from the losing side of a split where
1581                  * neccessary within its internal records, as this state information is
1582                  * not explicitly echoed out in that protocol.
1583                  *
1584                  * The winning side on the other hand will ignore all user modes from the
1585                  * losing side, so only its own modes get applied. Life is simple for those
1586                  * who succeed at internets. :-)
1587                  *
1588                  * NOTE: Unlike TS6 and dreamforge and other protocols which have SJOIN,
1589                  * FJOIN does not contain the simple-modes such as +iklmnsp. Why not,
1590                  * you ask? Well, quite simply because we don't need to. They'll be sent
1591                  * after the FJOIN by FMODE, and FMODE is timestamped, so in the event
1592                  * the losing side sends any modes for the channel which shouldnt win,
1593                  * they wont as their timestamp will be too high :-)
1594                  */
1595
1596                 if (params.size() < 3)
1597                         return true;
1598
1599                 char first[MAXBUF];             /* The first parameter of the mode command */
1600                 char modestring[MAXBUF];        /* The mode sequence (2nd parameter) of the mode command */
1601                 char* mode_users[127];          /* The values used by the mode command */
1602                 memset(&mode_users,0,sizeof(mode_users));       /* Initialize mode parameters */
1603                 mode_users[0] = first;          /* Set this up to be our on-stack value */
1604                 mode_users[1] = modestring;     /* Same here as above */
1605                 strcpy(modestring,"+");         /* Initialize the mode sequence to just '+' */
1606                 unsigned int modectr = 2;       /* Pointer to the third mode parameter (e.g. the one after the +-sequence) */
1607
1608                 userrec* who = NULL;                    /* User we are currently checking */
1609                 std::string channel = params[0];        /* Channel name, as a string */
1610                 time_t TS = atoi(params[1].c_str());    /* Timestamp given to us for remote side */
1611                 bool created = false;
1612
1613                 /* Try and find the channel */
1614                 chanrec* chan = this->Instance->FindChan(channel);
1615
1616                 /* Initialize channel name in the mode parameters */
1617                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
1618
1619                 /* default TS is a high value, which if we dont have this
1620                  * channel will let the other side apply their modes.
1621                  */
1622                 time_t ourTS = Instance->Time(true)+600;
1623
1624                 /* Does this channel exist? if it does, get its REAL timestamp */
1625                 if (chan)
1626                         ourTS = chan->age;
1627                 else
1628                         created = true; /* don't perform deops, and set TS to correct time after processing. */
1629
1630                 /* Check if there are any local users on this channel. If there are not, set created = true.
1631                  * If there are no local users here, theres no need for us to bounce the modes, we leave this
1632                  * to servers which do have local users and save some bandwidth and prevent spurious deops
1633                  */
1634                 if (!created)
1635                 {
1636                         CUList elist;
1637                         TreeServerList list;
1638                         Utils->GetListOfServersForChannel(chan, list, 0, elist);
1639                         if (list.find(Utils->TreeRoot) == list.end())
1640                                 created = true;
1641                 }
1642
1643
1644                 /* In 1.1, if they have the newer channel, we immediately clear
1645                  * all status modes from our users. We then accept their modes.
1646                  * If WE have the newer channel its the other side's job to do this.
1647                  * Note that this causes the losing server to send out confirming
1648                  * FMODE lines.
1649                  */
1650                 if (ourTS > TS)
1651                 {
1652                         std::deque<std::string> param_list;
1653
1654                         /* Lower the TS here */
1655                         if (Utils->AnnounceTSChange && chan)
1656                                 chan->WriteChannelWithServ(Instance->Config->ServerName,
1657                                 "NOTICE %s :TS for %s changed from %lu to %lu", chan->name, chan->name, ourTS, TS);
1658                         ourTS = TS;
1659
1660                         /* Zap all the privilage modes on our side, if the channel exists here */
1661                         if (!created)
1662                         {
1663                                 param_list.push_back(channel);
1664                                 this->RemoveStatus(Instance->Config->ServerName, param_list);
1665                                 chan->age = TS;
1666                         }
1667                 }
1668
1669                 /* Put the final parameter of the FJOIN into a tokenstream ready to split it */
1670                 irc::tokenstream users(params[2]);
1671                 std::string item = "*";
1672
1673                 /* do this first, so our mode reversals are correctly received by other servers
1674                  * if there is a TS collision.
1675                  */
1676                 params[2] = ":" + params[2];
1677                 Utils->DoOneToAllButSender(source,"FJOIN",params,source);
1678
1679                 /* Now, process every 'prefixes,nick' pair */
1680                 while (item != "")
1681                 {
1682                         /* Find next user */
1683                         item = users.GetToken();
1684
1685                         const char* usr = item.c_str();
1686
1687                         /* Safety check just to make sure someones not sent us an FJOIN full of spaces
1688                          * (is this even possible?) */
1689                         if (usr && *usr)
1690                         {
1691                                 const char* permissions = usr;
1692                                 int ntimes = 0;
1693                                 char* nm = new char[MAXBUF];
1694                                 char* tnm = nm;
1695
1696                                 /* Iterate through all the prefix values, convert them from prefixes
1697                                  * to mode letters, and append them to the mode sequence
1698                                  */
1699                                 while ((*permissions) && (*permissions != ',') && (ntimes < MAXBUF))
1700                                 {
1701                                         ModeHandler* mh = Instance->Modes->FindPrefix(*permissions);
1702                                         if (mh)
1703                                         {
1704                                                 /* This is a valid prefix */
1705                                                 ntimes++;
1706                                                 *tnm++ = mh->GetModeChar();
1707                                         }
1708                                         else
1709                                         {
1710                                                 /* Not a valid prefix...
1711                                                  * danger bill bobbertson! (that's will robinsons older brother ;-) ...)
1712                                                  */
1713                                                 this->Instance->WriteOpers("ERROR: We received a user with an unknown prefix '%c'. Closed connection to avoid a desync.",*permissions);
1714                                                 this->WriteLine(std::string("ERROR :Invalid prefix '")+(*permissions)+"' in FJOIN");
1715                                                 return false;
1716                                         }
1717                                         usr++;
1718                                         permissions++;
1719                                 }
1720
1721                                 /* Null terminate modes */
1722                                 *tnm = 0;
1723                                 /* Advance past the comma, to the nick */
1724                                 usr++;
1725
1726                                 /* Check the user actually exists */
1727                                 who = this->Instance->FindNick(usr);
1728                                 if (who)
1729                                 {
1730                                         /* Did they get any modes? How many times? */
1731                                         strlcat(modestring, nm, MAXBUF);
1732                                         for (int k = 0; k < ntimes; k++)
1733                                                 mode_users[modectr++] = strdup(usr);
1734
1735                                         /* Free temporary buffer used for mode sequence */
1736                                         delete[] nm;
1737
1738                                         /* Check that the user's 'direction' is correct
1739                                          * based on the server sending the FJOIN. We must
1740                                          * check each nickname in turn, because the origin of
1741                                          * the FJOIN may be different to the origin of the nicks
1742                                          * in the command itself.
1743                                          */
1744                                         TreeServer* route_back_again = Utils->BestRouteTo(who->server);
1745                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
1746                                         {
1747                                                 /* Oh dear oh dear. */
1748                                                 Instance->Log(DEBUG,"Fake direction in FJOIN, user '%s'",who->nick);
1749                                                 continue;
1750                                         }
1751                                         /* Finally, we can actually place the user into the channel.
1752                                          * We're sure its right. Final answer, phone a friend.
1753                                          */
1754                                         chanrec::JoinUser(this->Instance, who, channel.c_str(), true, "");
1755
1756                                         /* Have we already queued up MAXMODES modes with parameters
1757                                          * (+qaohv) ready to be sent to the server?
1758                                          */
1759                                         if (modectr >= (MAXMODES-1))
1760                                         {
1761                                                 /* Only actually give the users any status if we lost
1762                                                  * the FJOIN or drew (equal timestamps).
1763                                                  * It isn't actually possible for ourTS to be > TS here,
1764                                                  * only possible to actually have ourTS == TS, or
1765                                                  * ourTS < TS, because if we lost, we already lowered
1766                                                  * our TS above before we entered this loop. We only
1767                                                  * check >= as a safety measure, in case someone stuffed
1768                                                  * up. If someone DID stuff up, it was most likely me.
1769                                                  * Note: I do not like baseball bats in the face...
1770                                                  */
1771                                                 if (ourTS >= TS)
1772                                                 {
1773                                                         Instance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1774                                                         this->Instance->SendMode((const char**)mode_users,modectr,who);
1775
1776                                                         /* Something stuffed up, and for some reason, the timestamp is
1777                                                          * NOT lowered right now and should be. Lower it. Usually this
1778                                                          * code won't be executed, doubtless someone will remove it some
1779                                                          * day soon.
1780                                                          */
1781                                                         if (ourTS > TS)
1782                                                         {
1783                                                                 Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
1784                                                                 chan->age = TS;
1785                                                                 ourTS = TS;
1786                                                         }
1787                                                 }
1788
1789                                                 /* Reset all this back to defaults, and
1790                                                  * free any ram we have left allocated.
1791                                                  */
1792                                                 strcpy(mode_users[1],"+");
1793                                                 for (unsigned int f = 2; f < modectr; f++)
1794                                                         free(mode_users[f]);
1795                                                 modectr = 2;
1796                                         }
1797                                 }
1798                                 else
1799                                 {
1800                                         /* Remember to free this */
1801                                         delete[] nm;
1802                                         /* If we got here, there's a nick in FJOIN which doesnt exist on this server.
1803                                          * We don't try to process the nickname here (that WOULD cause a segfault because
1804                                          * we'd be playing with null pointers) however, we DO pass the nickname on, just
1805                                          * in case somehow we're desynched, so that other users which might be able to see
1806                                          * the nickname get their fair chance to process it.
1807                                          */
1808                                         Instance->Log(SPARSE,"Warning! Invalid user in FJOIN to channel %s IGNORED", channel.c_str());
1809                                         continue;
1810                                 }
1811                         }
1812                 }
1813
1814                 /* there werent enough modes built up to flush it during FJOIN,
1815                  * or, there are a number left over. flush them out.
1816                  */
1817                 if ((modectr > 2) && (who) && (chan))
1818                 {
1819                         if (ourTS >= TS)
1820                         {
1821                                 /* Our channel is newer than theirs. Evil deeds must be afoot. */
1822                                 this->Instance->SendMode((const char**)mode_users,modectr,who);
1823                                 /* Yet again, we can't actually get a true value here, if everything else
1824                                  * is working as it should.
1825                                  */
1826                                 if (ourTS > TS)
1827                                 {
1828                                         Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
1829                                         chan->age = TS;
1830                                         ourTS = TS;
1831                                 }
1832                         }
1833
1834                         /* Free anything we have left to free */
1835                         for (unsigned int f = 2; f < modectr; f++)
1836                                 free(mode_users[f]);
1837                 }
1838
1839                 /* if we newly created the channel, set it's TS properly. */
1840                 if (created)
1841                 {
1842                         /* find created channel .. */
1843                         chan = this->Instance->FindChan(channel);
1844                         if (chan)
1845                                 /* w00t said this shouldnt be needed but it is.
1846                                  * This isnt strictly true, as chan can be NULL
1847                                  * if a nick collision has occured and therefore
1848                                  * the channel was never created.
1849                                  */
1850                                 chan->age = TS;
1851                 }
1852
1853                 /* All done. That wasnt so bad was it, you can wipe
1854                  * the sweat from your forehead now. :-)
1855                  */
1856                 return true;
1857         }
1858
1859         /** NICK command */
1860         bool IntroduceClient(const std::string &source, std::deque<std::string> &params)
1861         {
1862                 if (params.size() < 8)
1863                         return true;
1864                 if (params.size() > 8)
1865                 {
1866                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
1867                         return true;
1868                 }
1869                 // NICK age nick host dhost ident +modes ip :gecos
1870                 //       0    1   2     3     4      5   6     7
1871                 time_t age = atoi(params[0].c_str());
1872
1873                 /* This used to have a pretty craq'y loop doing the same thing,
1874                  * now we just let the STL do the hard work (more efficiently)
1875                  */
1876                 std::string::size_type pos_after_plus = params[5].find_first_not_of('+');
1877                 if (pos_after_plus != std::string::npos)
1878                         params[5] = params[5].substr(pos_after_plus);
1879
1880                 const char* tempnick = params[1].c_str();
1881                 Instance->Log(DEBUG,"Introduce client %s!%s@%s",tempnick,params[4].c_str(),params[2].c_str());
1882
1883                 user_hash::iterator iter = this->Instance->clientlist->find(tempnick);
1884
1885                 if (iter != this->Instance->clientlist->end())
1886                 {
1887                         // nick collision
1888                         Instance->Log(DEBUG,"Nick collision on %s!%s@%s: %lu %lu",tempnick,params[4].c_str(),params[2].c_str(),(unsigned long)age,(unsigned long)iter->second->age);
1889                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+tempnick+" :Nickname collision");
1890                         userrec::QuitUser(this->Instance, iter->second, "Nickname collision");
1891                         return true;
1892                 }
1893
1894                 userrec* _new = new userrec(this->Instance);
1895                 (*(this->Instance->clientlist))[tempnick] = _new;
1896                 _new->SetFd(FD_MAGIC_NUMBER);
1897                 strlcpy(_new->nick, tempnick,NICKMAX-1);
1898                 strlcpy(_new->host, params[2].c_str(),63);
1899                 strlcpy(_new->dhost, params[3].c_str(),63);
1900                 _new->server = this->Instance->FindServerNamePtr(source.c_str());
1901                 strlcpy(_new->ident, params[4].c_str(),IDENTMAX);
1902                 strlcpy(_new->fullname, params[7].c_str(),MAXGECOS);
1903                 _new->registered = REG_ALL;
1904                 _new->signon = age;
1905
1906                 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
1907                         _new->modes[(*v)-65] = 1;
1908
1909 #ifdef SUPPORT_IP6LINKS
1910                 if (params[6].find_first_of(":") != std::string::npos)
1911                         _new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
1912                 else
1913 #endif
1914                         _new->SetSockAddr(AF_INET, params[6].c_str(), 0);
1915
1916                 Instance->AddGlobalClone(_new);
1917
1918                 this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString());
1919
1920                 params[7] = ":" + params[7];
1921                 Utils->DoOneToAllButSender(source,"NICK",params,source);
1922
1923                 // Increment the Source Servers User Count..
1924                 TreeServer* SourceServer = Utils->FindServer(source);
1925                 if (SourceServer)
1926                 {
1927                         Instance->Log(DEBUG,"Found source server of %s",_new->nick);
1928                         SourceServer->AddUserCount();
1929                 }
1930
1931                 FOREACH_MOD_I(Instance,I_OnPostConnect,OnPostConnect(_new));
1932
1933                 return true;
1934         }
1935
1936         /** Send one or more FJOINs for a channel of users.
1937          * If the length of a single line is more than 480-NICKMAX
1938          * in length, it is split over multiple lines.
1939          */
1940         void SendFJoins(TreeServer* Current, chanrec* c)
1941         {
1942                 std::string buffer;
1943
1944                 Instance->Log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1945                 char list[MAXBUF];
1946                 std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
1947
1948                 size_t dlen, curlen;
1949                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1950                 int numusers = 0;
1951                 char* ptr = list + dlen;
1952
1953                 CUList *ulist = c->GetUsers();
1954                 std::string modes = "";
1955                 std::string params = "";
1956
1957                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1958                 {
1959                         // The first parameter gets a : before it
1960                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick);
1961
1962                         curlen += ptrlen;
1963                         ptr += ptrlen;
1964
1965                         numusers++;
1966
1967                         if (curlen > (480-NICKMAX))
1968                         {
1969                                 buffer.append(list).append("\r\n");
1970
1971                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1972                                 ptr = list + dlen;
1973                                 ptrlen = 0;
1974                                 numusers = 0;
1975                         }
1976                 }
1977
1978                 if (numusers)
1979                         buffer.append(list).append("\r\n");
1980
1981                 /* Sorry for the hax. Because newly created channels assume +nt,
1982                  * if this channel doesnt have +nt, explicitly send -n and -t for the missing modes.
1983                  */
1984                 bool inverted = false;
1985                 if (!c->IsModeSet('n'))
1986                 {
1987                         modes.append("-n");
1988                         inverted = true;
1989                 }
1990                 if (!c->IsModeSet('t'))
1991                 {
1992                         modes.append("-t");
1993                         inverted = true;
1994                 }
1995                 if (inverted)
1996                 {
1997                         modes.append("+");
1998                 }
1999
2000                 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
2001                 {
2002                         modes.append("b");
2003                         params.append(" ").append(b->data);
2004
2005                         if (params.length() >= MAXMODES)
2006                         {
2007                                 /* Wrap at MAXMODES */
2008                                 buffer.append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params).append("\r\n");
2009                                 modes = "";
2010                                 params = "";
2011                         }
2012                 }
2013
2014                 buffer.append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(c->ChanModes(true));
2015
2016                 /* Only send these if there are any */
2017                 if (!modes.empty())
2018                         buffer.append("\r\n").append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params);
2019
2020                 this->WriteLine(buffer);
2021         }
2022
2023         /** Send G, Q, Z and E lines */
2024         void SendXLines(TreeServer* Current)
2025         {
2026                 char data[MAXBUF];
2027                 std::string buffer;
2028                 std::string n = this->Instance->Config->ServerName;
2029                 const char* sn = n.c_str();
2030
2031                 /* Yes, these arent too nice looking, but they get the job done */
2032                 for (std::vector<ZLine*>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++)
2033                 {
2034                         snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s\r\n",sn,(*i)->ipaddr,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
2035                         buffer.append(data);
2036                 }
2037                 for (std::vector<QLine*>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++)
2038                 {
2039                         snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s\r\n",sn,(*i)->nick,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
2040                         buffer.append(data);
2041                 }
2042                 for (std::vector<GLine*>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++)
2043                 {
2044                         snprintf(data,MAXBUF,":%s ADDLINE G %s@%s %s %lu %lu :%s\r\n",sn,(*i)->identmask,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
2045                         buffer.append(data);
2046                 }
2047                 for (std::vector<ELine*>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++)
2048                 {
2049                         snprintf(data,MAXBUF,":%s ADDLINE E %s@%s %s %lu %lu :%s\r\n",sn,(*i)->identmask,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
2050                         buffer.append(data);
2051                 }
2052                 for (std::vector<ZLine*>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++)
2053                 {
2054                         snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s\r\n",sn,(*i)->ipaddr,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
2055                         buffer.append(data);
2056                 }
2057                 for (std::vector<QLine*>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++)
2058                 {
2059                         snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s\r\n",sn,(*i)->nick,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
2060                         buffer.append(data);
2061                 }
2062                 for (std::vector<GLine*>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++)
2063                 {
2064                         snprintf(data,MAXBUF,":%s ADDLINE G %s@%s %s %lu %lu :%s\r\n",sn,(*i)->identmask,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
2065                         buffer.append(data);
2066                 }
2067                 for (std::vector<ELine*>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++)
2068                 {
2069                         snprintf(data,MAXBUF,":%s ADDLINE E %s@%s %s %lu %lu :%s\r\n",sn,(*i)->identmask,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
2070                         buffer.append(data);
2071                 }
2072
2073                 if (!buffer.empty())
2074                         this->WriteLine(buffer);
2075         }
2076
2077         /** Send channel modes and topics */
2078         void SendChannelModes(TreeServer* Current)
2079         {
2080                 char data[MAXBUF];
2081                 std::deque<std::string> list;
2082                 std::string n = this->Instance->Config->ServerName;
2083                 const char* sn = n.c_str();
2084                 for (chan_hash::iterator c = this->Instance->chanlist->begin(); c != this->Instance->chanlist->end(); c++)
2085                 {
2086                         SendFJoins(Current, c->second);
2087                         if (*c->second->topic)
2088                         {
2089                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
2090                                 this->WriteLine(data);
2091                         }
2092                         FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)Utils->Creator,(void*)this));
2093                         list.clear();
2094                         c->second->GetExtList(list);
2095                         for (unsigned int j = 0; j < list.size(); j++)
2096                         {
2097                                 FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)Utils->Creator,(void*)this,list[j]));
2098                         }
2099                 }
2100         }
2101
2102         /** send all users and their oper state/modes */
2103         void SendUsers(TreeServer* Current)
2104         {
2105                 char data[MAXBUF];
2106                 std::deque<std::string> list;
2107                 std::string dataline;
2108                 for (user_hash::iterator u = this->Instance->clientlist->begin(); u != this->Instance->clientlist->end(); u++)
2109                 {
2110                         if (u->second->registered == REG_ALL)
2111                         {
2112                                 snprintf(data,MAXBUF,":%s NICK %lu %s %s %s %s +%s %s :%s",u->second->server,(unsigned long)u->second->age,u->second->nick,u->second->host,u->second->dhost,u->second->ident,u->second->FormatModes(),u->second->GetIPString(),u->second->fullname);
2113                                 this->WriteLine(data);
2114                                 if (*u->second->oper)
2115                                 {
2116                                         snprintf(data,MAXBUF,":%s OPERTYPE %s", u->second->nick, u->second->oper);
2117                                         this->WriteLine(data);
2118                                 }
2119                                 if (*u->second->awaymsg)
2120                                 {
2121                                         snprintf(data,MAXBUF,":%s AWAY :%s", u->second->nick, u->second->awaymsg);
2122                                         this->WriteLine(data);
2123                                 }
2124                                 FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)Utils->Creator,(void*)this));
2125                                 list.clear();
2126                                 u->second->GetExtList(list);
2127                                 for (unsigned int j = 0; j < list.size(); j++)
2128                                 {
2129                                         FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)Utils->Creator,(void*)this,list[j]));
2130                                 }
2131                         }
2132                 }
2133         }
2134
2135         /** This function is called when we want to send a netburst to a local
2136          * server. There is a set order we must do this, because for example
2137          * users require their servers to exist, and channels require their
2138          * users to exist. You get the idea.
2139          */
2140         void DoBurst(TreeServer* s)
2141         {
2142                 std::string burst = "BURST "+ConvToStr(Instance->Time(true));
2143                 std::string endburst = "ENDBURST";
2144                 // Because by the end of the netburst, it  could be gone!
2145                 std::string name = s->GetName();
2146                 this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2"+name+"\2.");
2147                 this->WriteLine(burst);
2148                 /* send our version string */
2149                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
2150                 /* Send server tree */
2151                 this->SendServers(Utils->TreeRoot,s,1);
2152                 /* Send users and their oper status */
2153                 this->SendUsers(s);
2154                 /* Send everything else (channel modes, xlines etc) */
2155                 this->SendChannelModes(s);
2156                 this->SendXLines(s);
2157                 FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)Utils->Creator,(void*)this));
2158                 this->WriteLine(endburst);
2159                 this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
2160         }
2161
2162         /** This function is called when we receive data from a remote
2163          * server. We buffer the data in a std::string (it doesnt stay
2164          * there for long), reading using InspSocket::Read() which can
2165          * read up to 16 kilobytes in one operation.
2166          *
2167          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
2168          * THE SOCKET OBJECT FOR US.
2169          */
2170         virtual bool OnDataReady()
2171         {
2172                 char* data = this->Read();
2173                 /* Check that the data read is a valid pointer and it has some content */
2174                 if (data && *data)
2175                 {
2176                         this->in_buffer.append(data);
2177                         /* While there is at least one new line in the buffer,
2178                          * do something useful (we hope!) with it.
2179                          */
2180                         while (in_buffer.find("\n") != std::string::npos)
2181                         {
2182                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
2183                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
2184                                 /* Use rfind here not find, as theres more
2185                                  * chance of the \r being near the end of the
2186                                  * string, not the start.
2187                                  */
2188                                 if (ret.find("\r") != std::string::npos)
2189                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
2190                                 /* Process this one, abort if it
2191                                  * didnt return true.
2192                                  */
2193                                 if (!this->ProcessLine(ret))
2194                                 {
2195                                         return false;
2196                                 }
2197                         }
2198                         return true;
2199                 }
2200                 /* EAGAIN returns an empty but non-NULL string, so this
2201                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
2202                  */
2203                 return (data && !*data);
2204         }
2205
2206         int WriteLine(std::string line)
2207         {
2208                 Instance->Log(DEBUG,"OUT: %s",line.c_str());
2209                 line.append("\r\n");
2210                 return this->Write(line);
2211         }
2212
2213         /* Handle ERROR command */
2214         bool Error(std::deque<std::string> &params)
2215         {
2216                 if (params.size() < 1)
2217                         return false;
2218                 this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
2219                 /* we will return false to cause the socket to close. */
2220                 return false;
2221         }
2222
2223         /** remote MOTD. leet, huh? */
2224         bool Motd(const std::string &prefix, std::deque<std::string> &params)
2225         {
2226                 if (params.size() > 0)
2227                 {
2228                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2229                         {
2230                                 /* It's for our server */
2231                                 string_list results;
2232                                 userrec* source = this->Instance->FindNick(prefix);
2233
2234                                 if (source)
2235                                 {
2236                                         std::deque<std::string> par;
2237                                         par.push_back(prefix);
2238                                         par.push_back("");
2239
2240                                         if (!Instance->Config->MOTD.size())
2241                                         {
2242                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
2243                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2244                                                 return true;
2245                                         }
2246
2247                                         par[1] = std::string("::")+Instance->Config->ServerName+" 375 "+source->nick+" :"+Instance->Config->ServerName+" message of the day";
2248                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2249
2250                                         for (unsigned int i = 0; i < Instance->Config->MOTD.size(); i++)
2251                                         {
2252                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 372 "+source->nick+" :- "+Instance->Config->MOTD[i];
2253                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2254                                         }
2255
2256                                         par[1] = std::string("::")+Instance->Config->ServerName+" 376 "+source->nick+" End of message of the day.";
2257                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2258                                 }
2259                         }
2260                         else
2261                         {
2262                                 /* Pass it on */
2263                                 userrec* source = this->Instance->FindNick(prefix);
2264                                 if (source)
2265                                         Utils->DoOneToOne(prefix, "MOTD", params, params[0]);
2266                         }
2267                 }
2268                 return true;
2269         }
2270
2271         /** remote ADMIN. leet, huh? */
2272         bool Admin(const std::string &prefix, std::deque<std::string> &params)
2273         {
2274                 if (params.size() > 0)
2275                 {
2276                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2277                         {
2278                                 /* It's for our server */
2279                                 string_list results;
2280                                 userrec* source = this->Instance->FindNick(prefix);
2281
2282                                 if (source)
2283                                 {
2284                                         std::deque<std::string> par;
2285                                         par.push_back(prefix);
2286                                         par.push_back("");
2287
2288                                         par[1] = std::string("::")+Instance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+Instance->Config->ServerName;
2289                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2290
2291                                         par[1] = std::string("::")+Instance->Config->ServerName+" 257 "+source->nick+" :Name     - "+Instance->Config->AdminName;
2292                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2293
2294                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+Instance->Config->AdminNick;
2295                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2296
2297                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+Instance->Config->AdminEmail;
2298                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2299                                 }
2300                         }
2301                         else
2302                         {
2303                                 /* Pass it on */
2304                                 userrec* source = this->Instance->FindNick(prefix);
2305                                 if (source)
2306                                         Utils->DoOneToOne(prefix, "ADMIN", params, params[0]);
2307                         }
2308                 }
2309                 return true;
2310         }
2311
2312         bool Stats(const std::string &prefix, std::deque<std::string> &params)
2313         {
2314                 /* Get the reply to a STATS query if it matches this servername,
2315                  * and send it back as a load of PUSH queries
2316                  */
2317                 if (params.size() > 1)
2318                 {
2319                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
2320                         {
2321                                 /* It's for our server */
2322                                 string_list results;
2323                                 userrec* source = this->Instance->FindNick(prefix);
2324                                 if (source)
2325                                 {
2326                                         std::deque<std::string> par;
2327                                         par.push_back(prefix);
2328                                         par.push_back("");
2329                                         DoStats(this->Instance, *(params[0].c_str()), source, results);
2330                                         for (size_t i = 0; i < results.size(); i++)
2331                                         {
2332                                                 par[1] = "::" + results[i];
2333                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2334                                         }
2335                                 }
2336                         }
2337                         else
2338                         {
2339                                 /* Pass it on */
2340                                 userrec* source = this->Instance->FindNick(prefix);
2341                                 if (source)
2342                                         Utils->DoOneToOne(prefix, "STATS", params, params[1]);
2343                         }
2344                 }
2345                 return true;
2346         }
2347
2348
2349         /** Because the core won't let users or even SERVERS set +o,
2350          * we use the OPERTYPE command to do this.
2351          */
2352         bool OperType(const std::string &prefix, std::deque<std::string> &params)
2353         {
2354                 if (params.size() != 1)
2355                 {
2356                         Instance->Log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
2357                         return true;
2358                 }
2359                 std::string opertype = params[0];
2360                 userrec* u = this->Instance->FindNick(prefix);
2361                 if (u)
2362                 {
2363                         u->modes[UM_OPERATOR] = 1;
2364                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
2365                         Utils->DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
2366                         this->Instance->SNO->WriteToSnoMask('o',"From %s: User %s (%s@%s) is now an IRC operator of type %s",u->server, u->nick,u->ident,u->host,irc::Spacify(opertype.c_str()));
2367
2368                 }
2369                 return true;
2370         }
2371
2372         /** Because Andy insists that services-compatible servers must
2373          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
2374          */
2375         bool ForceNick(const std::string &prefix, std::deque<std::string> &params)
2376         {
2377                 if (params.size() < 3)
2378                         return true;
2379
2380                 userrec* u = this->Instance->FindNick(params[0]);
2381
2382                 if (u)
2383                 {
2384                         Utils->DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
2385                         if (IS_LOCAL(u))
2386                         {
2387                                 std::deque<std::string> par;
2388                                 par.push_back(params[1]);
2389                                 /* This is not required as one is sent in OnUserPostNick below
2390                                  */
2391                                 //Utils->DoOneToMany(u->nick,"NICK",par);
2392                                 if (!u->ForceNickChange(params[1].c_str()))
2393                                 {
2394                                         userrec::QuitUser(this->Instance, u, "Nickname collision");
2395                                         return true;
2396                                 }
2397                                 u->age = atoi(params[2].c_str());
2398                         }
2399                 }
2400                 return true;
2401         }
2402
2403         /*
2404          * Remote SQUIT (RSQUIT). Routing works similar to SVSNICK: Route it to the server that the target is connected to locally,
2405          * then let that server do the dirty work (squit it!). Example:
2406          * A -> B -> C -> D: oper on A squits D, A routes to B, B routes to C, C notices D connected locally, kills it. -- w00t
2407          */
2408         bool RemoteSquit(const std::string &prefix, std::deque<std::string> &params)
2409         {
2410                 /* ok.. :w00t RSQUIT jupe.barafranca.com :reason here */
2411                 if (params.size() < 2)
2412                         return true;
2413
2414                 TreeServer* s = Utils->FindServerMask(params[0]);
2415
2416                 if (s)
2417                 {
2418                         if (s == Utils->TreeRoot)
2419                         {
2420                                 this->Instance->SNO->WriteToSnoMask('l',"What the fuck, I recieved a remote SQUIT for myself? :< (from %s", prefix.c_str());
2421                                 return true;
2422                         }
2423
2424                         TreeSocket* sock = s->GetSocket();
2425
2426                         if (sock)
2427                         {
2428                                 /* it's locally connected, KILL IT! */
2429                                 Instance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
2430                                 Instance->SNO->WriteToSnoMask('l',"RSQUIT: Server \002%s\002 removed from network by %s: %s", params[0].c_str(), prefix.c_str(), params[1].c_str());
2431                                 sock->Squit(s,"Server quit by " + prefix + ": " + params[1]);
2432                                 Instance->SE->DelFd(sock);
2433                                 sock->Close();
2434                                 delete sock;
2435                         }
2436                         else
2437                         {
2438                                 /* route the rsquit */
2439                                 params[1] = ":" + params[1];
2440                                 Utils->DoOneToOne(prefix, "RSQUIT", params, params[0]);
2441                         }
2442                 }
2443                 else
2444                 {
2445                         /* mother fucker! it doesn't exist */
2446                 }
2447
2448                 return true;
2449         }
2450
2451         bool ServiceJoin(const std::string &prefix, std::deque<std::string> &params)
2452         {
2453                 if (params.size() < 2)
2454                         return true;
2455
2456                 userrec* u = this->Instance->FindNick(params[0]);
2457
2458                 if (u)
2459                 {
2460                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false);
2461                         Utils->DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
2462                 }
2463                 return true;
2464         }
2465
2466         bool RemoteRehash(const std::string &prefix, std::deque<std::string> &params)
2467         {
2468                 if (params.size() < 1)
2469                         return false;
2470
2471                 std::string servermask = params[0];
2472
2473                 if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
2474                 {
2475                         this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated from server \002"+prefix+"\002.");
2476                         this->Instance->RehashServer();
2477                         Utils->ReadConfiguration(false);
2478                         InitializeDisabledCommands(Instance->Config->DisabledCommands, Instance);
2479                 }
2480                 Utils->DoOneToAllButSender(prefix,"REHASH",params,prefix);
2481                 return true;
2482         }
2483
2484         bool RemoteKill(const std::string &prefix, std::deque<std::string> &params)
2485         {
2486                 if (params.size() != 2)
2487                         return true;
2488
2489                 std::string nick = params[0];
2490                 userrec* u = this->Instance->FindNick(prefix);
2491                 userrec* who = this->Instance->FindNick(nick);
2492
2493                 if (who)
2494                 {
2495                         /* Prepend kill source, if we don't have one */
2496                         std::string sourceserv = prefix;
2497                         if (u)
2498                         {
2499                                 sourceserv = u->server;
2500                         }
2501                         if (*(params[1].c_str()) != '[')
2502                         {
2503                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
2504                         }
2505                         std::string reason = params[1];
2506                         params[1] = ":" + params[1];
2507                         Utils->DoOneToAllButSender(prefix,"KILL",params,sourceserv);
2508                         who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
2509                         userrec::QuitUser(this->Instance,who,reason);
2510                 }
2511                 return true;
2512         }
2513
2514         bool LocalPong(const std::string &prefix, std::deque<std::string> &params)
2515         {
2516                 if (params.size() < 1)
2517                         return true;
2518
2519                 if (params.size() == 1)
2520                 {
2521                         TreeServer* ServerSource = Utils->FindServer(prefix);
2522                         if (ServerSource)
2523                         {
2524                                 ServerSource->SetPingFlag();
2525                         }
2526                 }
2527                 else
2528                 {
2529                         std::string forwardto = params[1];
2530                         if (forwardto == this->Instance->Config->ServerName)
2531                         {
2532                                 /*
2533                                  * this is a PONG for us
2534                                  * if the prefix is a user, check theyre local, and if they are,
2535                                  * dump the PONG reply back to their fd. If its a server, do nowt.
2536                                  * Services might want to send these s->s, but we dont need to yet.
2537                                  */
2538                                 userrec* u = this->Instance->FindNick(prefix);
2539
2540                                 if (u)
2541                                 {
2542                                         u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
2543                                 }
2544                         }
2545                         else
2546                         {
2547                                 // not for us, pass it on :)
2548                                 Utils->DoOneToOne(prefix,"PONG",params,forwardto);
2549                         }
2550                 }
2551
2552                 return true;
2553         }
2554
2555         bool MetaData(const std::string &prefix, std::deque<std::string> &params)
2556         {
2557                 if (params.size() < 3)
2558                         return true;
2559
2560                 TreeServer* ServerSource = Utils->FindServer(prefix);
2561
2562                 if (ServerSource)
2563                 {
2564                         if (params[0] == "*")
2565                         {
2566                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
2567                         }
2568                         else if (*(params[0].c_str()) == '#')
2569                         {
2570                                 chanrec* c = this->Instance->FindChan(params[0]);
2571                                 if (c)
2572                                 {
2573                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
2574                                 }
2575                         }
2576                         else if (*(params[0].c_str()) != '#')
2577                         {
2578                                 userrec* u = this->Instance->FindNick(params[0]);
2579                                 if (u)
2580                                 {
2581                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
2582                                 }
2583                         }
2584                 }
2585
2586                 params[2] = ":" + params[2];
2587                 Utils->DoOneToAllButSender(prefix,"METADATA",params,prefix);
2588                 return true;
2589         }
2590
2591         bool ServerVersion(const std::string &prefix, std::deque<std::string> &params)
2592         {
2593                 if (params.size() < 1)
2594                         return true;
2595
2596                 TreeServer* ServerSource = Utils->FindServer(prefix);
2597
2598                 if (ServerSource)
2599                 {
2600                         ServerSource->SetVersion(params[0]);
2601                 }
2602                 params[0] = ":" + params[0];
2603                 Utils->DoOneToAllButSender(prefix,"VERSION",params,prefix);
2604                 return true;
2605         }
2606
2607         bool ChangeHost(const std::string &prefix, std::deque<std::string> &params)
2608         {
2609                 if (params.size() < 1)
2610                         return true;
2611
2612                 userrec* u = this->Instance->FindNick(prefix);
2613
2614                 if (u)
2615                 {
2616                         u->ChangeDisplayedHost(params[0].c_str());
2617                         Utils->DoOneToAllButSender(prefix,"FHOST",params,u->server);
2618                 }
2619                 return true;
2620         }
2621
2622         bool AddLine(const std::string &prefix, std::deque<std::string> &params)
2623         {
2624                 if (params.size() < 6)
2625                         return true;
2626
2627                 bool propogate = false;
2628
2629                 switch (*(params[0].c_str()))
2630                 {
2631                         case 'Z':
2632                                 propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2633                                 Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2634                         break;
2635                         case 'Q':
2636                                 propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2637                                 Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2638                         break;
2639                         case 'E':
2640                                 propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2641                                 Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2642                         break;
2643                         case 'G':
2644                                 propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2645                                 Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2646                         break;
2647                         case 'K':
2648                                 propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2649                         break;
2650                         default:
2651                                 /* Just in case... */
2652                                 this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
2653                                 propogate = false;
2654                         break;
2655                 }
2656
2657                 /* Send it on its way */
2658                 if (propogate)
2659                 {
2660                         if (atoi(params[4].c_str()))
2661                         {
2662                                 this->Instance->SNO->WriteToSnoMask('x',"%s Added %cLINE on %s to expire in %lu seconds (%s).",prefix.c_str(),*(params[0].c_str()),params[1].c_str(),atoi(params[4].c_str()),params[5].c_str());
2663                         }
2664                         else
2665                         {
2666                                 this->Instance->SNO->WriteToSnoMask('x',"%s Added permenant %cLINE on %s (%s).",prefix.c_str(),*(params[0].c_str()),params[1].c_str(),params[5].c_str());
2667                         }
2668                         params[5] = ":" + params[5];
2669                         Utils->DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
2670                 }
2671                 if (!this->bursting)
2672                 {
2673                         Instance->Log(DEBUG,"Applying lines...");
2674                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2675                 }
2676                 return true;
2677         }
2678
2679         bool ChangeName(const std::string &prefix, std::deque<std::string> &params)
2680         {
2681                 if (params.size() < 1)
2682                         return true;
2683
2684                 userrec* u = this->Instance->FindNick(prefix);
2685
2686                 if (u)
2687                 {
2688                         u->ChangeName(params[0].c_str());
2689                         params[0] = ":" + params[0];
2690                         Utils->DoOneToAllButSender(prefix,"FNAME",params,u->server);
2691                 }
2692                 return true;
2693         }
2694
2695         bool Whois(const std::string &prefix, std::deque<std::string> &params)
2696         {
2697                 if (params.size() < 1)
2698                         return true;
2699
2700                 Instance->Log(DEBUG,"In IDLE command");
2701                 userrec* u = this->Instance->FindNick(prefix);
2702
2703                 if (u)
2704                 {
2705                         Instance->Log(DEBUG,"USER EXISTS: %s",u->nick);
2706                         // an incoming request
2707                         if (params.size() == 1)
2708                         {
2709                                 userrec* x = this->Instance->FindNick(params[0]);
2710                                 if ((x) && (IS_LOCAL(x)))
2711                                 {
2712                                         userrec* x = this->Instance->FindNick(params[0]);
2713                                         char signon[MAXBUF];
2714                                         char idle[MAXBUF];
2715
2716                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
2717                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-Instance->Time(true)));
2718                                         std::deque<std::string> par;
2719                                         par.push_back(prefix);
2720                                         par.push_back(signon);
2721                                         par.push_back(idle);
2722                                         // ours, we're done, pass it BACK
2723                                         Utils->DoOneToOne(params[0],"IDLE",par,u->server);
2724                                 }
2725                                 else
2726                                 {
2727                                         // not ours pass it on
2728                                         Utils->DoOneToOne(prefix,"IDLE",params,x->server);
2729                                 }
2730                         }
2731                         else if (params.size() == 3)
2732                         {
2733                                 std::string who_did_the_whois = params[0];
2734                                 userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
2735                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2736                                 {
2737                                         // an incoming reply to a whois we sent out
2738                                         std::string nick_whoised = prefix;
2739                                         unsigned long signon = atoi(params[1].c_str());
2740                                         unsigned long idle = atoi(params[2].c_str());
2741                                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2742                                                 do_whois(this->Instance,who_to_send_to,u,signon,idle,nick_whoised.c_str());
2743                                 }
2744                                 else
2745                                 {
2746                                         // not ours, pass it on
2747                                         Utils->DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
2748                                 }
2749                         }
2750                 }
2751                 return true;
2752         }
2753
2754         bool Push(const std::string &prefix, std::deque<std::string> &params)
2755         {
2756                 if (params.size() < 2)
2757                         return true;
2758
2759                 userrec* u = this->Instance->FindNick(params[0]);
2760
2761                 if (!u)
2762                         return true;
2763
2764                 if (IS_LOCAL(u))
2765                 {
2766                         u->Write(params[1]);
2767                 }
2768                 else
2769                 {
2770                         // continue the raw onwards
2771                         params[1] = ":" + params[1];
2772                         Utils->DoOneToOne(prefix,"PUSH",params,u->server);
2773                 }
2774                 return true;
2775         }
2776
2777         bool HandleSetTime(const std::string &prefix, std::deque<std::string> &params)
2778         {
2779                 if (!params.size() || !Utils->EnableTimeSync)
2780                         return true;
2781
2782                 bool force = false;
2783
2784                 if ((params.size() == 2) && (params[1] == "FORCE"))
2785                         force = true;
2786
2787                 time_t rts = atoi(params[0].c_str());
2788                 time_t us = Instance->Time(true);
2789
2790                 if (rts == us)
2791                 {
2792                         Instance->Log(DEBUG, "Timestamp from %s is equal", prefix.c_str());
2793
2794                         Utils->DoOneToAllButSender(prefix, "TIMESET", params, prefix);
2795                 }
2796                 else if (force || (rts < us))
2797                 {
2798                         int old = Instance->SetTimeDelta(rts - us);
2799                         Instance->Log(DEBUG, "%s TS (diff %d) from %s applied (old delta was %d)", (force) ? "Forced" : "Lower", rts - us, prefix.c_str(), old);
2800
2801                         Utils->DoOneToAllButSender(prefix, "TIMESET", params, prefix);
2802                 }
2803                 else
2804                 {
2805                         Instance->Log(DEBUG, "Higher TS (diff %d) from %s overridden", us - rts, prefix.c_str());
2806
2807                         std::deque<std::string> oparams;
2808                         oparams.push_back(ConvToStr(us));
2809
2810                         Utils->DoOneToMany(prefix, "TIMESET", oparams);
2811                 }
2812
2813                 return true;
2814         }
2815
2816         bool Time(const std::string &prefix, std::deque<std::string> &params)
2817         {
2818                 // :source.server TIME remote.server sendernick
2819                 // :remote.server TIME source.server sendernick TS
2820                 if (params.size() == 2)
2821                 {
2822                         // someone querying our time?
2823                         if (this->Instance->Config->ServerName == params[0])
2824                         {
2825                                 userrec* u = this->Instance->FindNick(params[1]);
2826                                 if (u)
2827                                 {
2828                                         params.push_back(ConvToStr(Instance->Time(false)));
2829                                         params[0] = prefix;
2830                                         Utils->DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
2831                                 }
2832                         }
2833                         else
2834                         {
2835                                 // not us, pass it on
2836                                 userrec* u = this->Instance->FindNick(params[1]);
2837                                 if (u)
2838                                         Utils->DoOneToOne(prefix,"TIME",params,params[0]);
2839                         }
2840                 }
2841                 else if (params.size() == 3)
2842                 {
2843                         // a response to a previous TIME
2844                         userrec* u = this->Instance->FindNick(params[1]);
2845                         if ((u) && (IS_LOCAL(u)))
2846                         {
2847                         time_t rawtime = atol(params[2].c_str());
2848                         struct tm * timeinfo;
2849                         timeinfo = localtime(&rawtime);
2850                                 char tms[26];
2851                                 snprintf(tms,26,"%s",asctime(timeinfo));
2852                                 tms[24] = 0;
2853                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
2854                         }
2855                         else
2856                         {
2857                                 if (u)
2858                                         Utils->DoOneToOne(prefix,"TIME",params,u->server);
2859                         }
2860                 }
2861                 return true;
2862         }
2863
2864         bool LocalPing(const std::string &prefix, std::deque<std::string> &params)
2865         {
2866                 if (params.size() < 1)
2867                         return true;
2868
2869                 if (params.size() == 1)
2870                 {
2871                         std::string stufftobounce = params[0];
2872                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
2873                         return true;
2874                 }
2875                 else
2876                 {
2877                         std::string forwardto = params[1];
2878                         if (forwardto == this->Instance->Config->ServerName)
2879                         {
2880                                 // this is a ping for us, send back PONG to the requesting server
2881                                 params[1] = params[0];
2882                                 params[0] = forwardto;
2883                                 Utils->DoOneToOne(forwardto,"PONG",params,params[1]);
2884                         }
2885                         else
2886                         {
2887                                 // not for us, pass it on :)
2888                                 Utils->DoOneToOne(prefix,"PING",params,forwardto);
2889                         }
2890                         return true;
2891                 }
2892         }
2893
2894         bool RemoveStatus(const std::string &prefix, std::deque<std::string> &params)
2895         {
2896                 if (params.size() < 1)
2897                         return true;
2898
2899                 chanrec* c = Instance->FindChan(params[0]);
2900
2901                 if (c)
2902                 {
2903                         irc::modestacker modestack(false);
2904                         CUList *ulist = c->GetUsers();
2905                         const char* y[127];
2906                         std::deque<std::string> stackresult;
2907                         std::string x;
2908
2909                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
2910                         {
2911                                 std::string modesequence = Instance->Modes->ModeString(i->second, c);
2912                                 if (modesequence.length())
2913                                 {
2914                                         Instance->Log(DEBUG,"Mode sequence = '%s'",modesequence.c_str());
2915                                         irc::spacesepstream sep(modesequence);
2916                                         std::string modeletters = sep.GetToken();
2917                                         Instance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2918
2919                                         while (!modeletters.empty())
2920                                         {
2921                                                 char mletter = *(modeletters.begin());
2922                                                 modestack.Push(mletter,sep.GetToken());
2923                                                 Instance->Log(DEBUG,"Push letter = '%c'",mletter);
2924                                                 modeletters.erase(modeletters.begin());
2925                                                 Instance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2926                                         }
2927                                 }
2928                         }
2929
2930                         while (modestack.GetStackedLine(stackresult))
2931                         {
2932                                 Instance->Log(DEBUG,"Stacked line size %d",stackresult.size());
2933                                 stackresult.push_front(ConvToStr(c->age));
2934                                 stackresult.push_front(c->name);
2935                                 Utils->DoOneToMany(Instance->Config->ServerName, "FMODE", stackresult);
2936                                 stackresult.erase(stackresult.begin() + 1);
2937                                 Instance->Log(DEBUG,"Stacked items:");
2938                                 for (size_t z = 0; z < stackresult.size(); z++)
2939                                 {
2940                                         y[z] = stackresult[z].c_str();
2941                                         Instance->Log(DEBUG,"\tstackresult[%d]='%s'",z,stackresult[z].c_str());
2942                                 }
2943                                 userrec* n = new userrec(Instance);
2944                                 n->SetFd(FD_MAGIC_NUMBER);
2945                                 Instance->SendMode(y, stackresult.size(), n);
2946                                 delete n;
2947                         }
2948                 }
2949                 return true;
2950         }
2951
2952         bool RemoteServer(const std::string &prefix, std::deque<std::string> &params)
2953         {
2954                 if (params.size() < 4)
2955                         return false;
2956
2957                 std::string servername = params[0];
2958                 std::string password = params[1];
2959                 // hopcount is not used for a remote server, we calculate this ourselves
2960                 std::string description = params[3];
2961                 TreeServer* ParentOfThis = Utils->FindServer(prefix);
2962
2963                 if (!ParentOfThis)
2964                 {
2965                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2966                         return false;
2967                 }
2968                 TreeServer* CheckDupe = Utils->FindServer(servername);
2969                 if (CheckDupe)
2970                 {
2971                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2972                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+servername+"\2 denied, already exists");
2973                         return false;
2974                 }
2975                 TreeServer* Node = new TreeServer(this->Utils,this->Instance,servername,description,ParentOfThis,NULL);
2976                 ParentOfThis->AddChild(Node);
2977                 params[3] = ":" + params[3];
2978                 Utils->DoOneToAllButSender(prefix,"SERVER",params,prefix);
2979                 this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2980                 return true;
2981         }
2982
2983         bool Outbound_Reply_Server(std::deque<std::string> &params)
2984         {
2985                 if (params.size() < 4)
2986                         return false;
2987
2988                 irc::string servername = params[0].c_str();
2989                 std::string sname = params[0];
2990                 std::string password = params[1];
2991                 int hops = atoi(params[2].c_str());
2992
2993                 if (hops)
2994                 {
2995                         this->WriteLine("ERROR :Server too far away for authentication");
2996                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2997                         return false;
2998                 }
2999                 std::string description = params[3];
3000                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
3001                 {
3002                         if ((x->Name == servername) && (x->RecvPass == password))
3003                         {
3004                                 TreeServer* CheckDupe = Utils->FindServer(sname);
3005                                 if (CheckDupe)
3006                                 {
3007                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
3008                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
3009                                         return false;
3010                                 }
3011                                 // Begin the sync here. this kickstarts the
3012                                 // other side, waiting in WAIT_AUTH_2 state,
3013                                 // into starting their burst, as it shows
3014                                 // that we're happy.
3015                                 this->LinkState = CONNECTED;
3016                                 // we should add the details of this server now
3017                                 // to the servers tree, as a child of the root
3018                                 // node.
3019                                 TreeServer* Node = new TreeServer(this->Utils,this->Instance,sname,description,Utils->TreeRoot,this);
3020                                 Utils->TreeRoot->AddChild(Node);
3021                                 params[3] = ":" + params[3];
3022                                 Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,sname);
3023                                 this->bursting = true;
3024                                 this->DoBurst(Node);
3025                                 return true;
3026                         }
3027                 }
3028                 this->WriteLine("ERROR :Invalid credentials");
3029                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
3030                 return false;
3031         }
3032
3033         bool Inbound_Server(std::deque<std::string> &params)
3034         {
3035                 if (params.size() < 4)
3036                         return false;
3037
3038                 irc::string servername = params[0].c_str();
3039                 std::string sname = params[0];
3040                 std::string password = params[1];
3041                 int hops = atoi(params[2].c_str());
3042
3043                 if (hops)
3044                 {
3045                         this->WriteLine("ERROR :Server too far away for authentication");
3046                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
3047                         return false;
3048                 }
3049                 std::string description = params[3];
3050                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
3051                 {
3052                         if ((x->Name == servername) && (x->RecvPass == password))
3053                         {
3054                                 TreeServer* CheckDupe = Utils->FindServer(sname);
3055                                 if (CheckDupe)
3056                                 {
3057                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
3058                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
3059                                         return false;
3060                                 }
3061                                 this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
3062
3063                                 if (this->Hook)
3064                                 {
3065                                         std::string name = InspSocketNameRequest((Module*)Utils->Creator, this->Hook).Send();
3066                                         this->Instance->SNO->WriteToSnoMask('l',"Connection from \2"+sname+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] using transport \2"+name+"\2");
3067                                 }
3068
3069                                 this->InboundServerName = sname;
3070                                 this->InboundDescription = description;
3071                                 // this is good. Send our details: Our server name and description and hopcount of 0,
3072                                 // along with the sendpass from this block.
3073                                 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
3074                                 // move to the next state, we are now waiting for THEM.
3075                                 this->LinkState = WAIT_AUTH_2;
3076                                 return true;
3077                         }
3078                 }
3079                 this->WriteLine("ERROR :Invalid credentials");
3080                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
3081                 return false;
3082         }
3083
3084         void Split(const std::string &line, std::deque<std::string> &n)
3085         {
3086                 n.clear();
3087                 irc::tokenstream tokens(line);
3088                 std::string param;
3089                 while ((param = tokens.GetToken()) != "")
3090                         n.push_back(param);
3091                 return;
3092         }
3093
3094         bool ProcessLine(std::string &line)
3095         {
3096                 std::deque<std::string> params;
3097                 irc::string command;
3098                 std::string prefix;
3099
3100                 line = line.substr(0, line.find_first_of("\r\n"));
3101
3102                 if (line.empty())
3103                         return true;
3104
3105                 Instance->Log(DEBUG,"IN: %s", line.c_str());
3106
3107                 this->Split(line.c_str(),params);
3108
3109                 if ((params[0][0] == ':') && (params.size() > 1))
3110                 {
3111                         prefix = params[0].substr(1);
3112                         params.pop_front();
3113                 }
3114
3115                 command = params[0].c_str();
3116                 params.pop_front();
3117
3118                 switch (this->LinkState)
3119                 {
3120                         TreeServer* Node;
3121
3122                         case WAIT_AUTH_1:
3123                                 // Waiting for SERVER command from remote server. Server initiating
3124                                 // the connection sends the first SERVER command, listening server
3125                                 // replies with theirs if its happy, then if the initiator is happy,
3126                                 // it starts to send its net sync, which starts the merge, otherwise
3127                                 // it sends an ERROR.
3128                                 if (command == "PASS")
3129                                 {
3130                                         /* Silently ignored */
3131                                 }
3132                                 else if (command == "SERVER")
3133                                 {
3134                                         return this->Inbound_Server(params);
3135                                 }
3136                                 else if (command == "ERROR")
3137                                 {
3138                                         return this->Error(params);
3139                                 }
3140                                 else if (command == "USER")
3141                                 {
3142                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
3143                                         return false;
3144                                 }
3145                                 else if (command == "CAPAB")
3146                                 {
3147                                         return this->Capab(params);
3148                                 }
3149                                 else if ((command == "U") || (command == "S"))
3150                                 {
3151                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3152                                         return false;
3153                                 }
3154                                 else
3155                                 {
3156                                         std::string error("ERROR :Invalid command in negotiation phase: ");
3157                                         error.append(command.c_str());
3158                                         this->WriteLine(error);
3159                                         return false;
3160                                 }
3161                         break;
3162                         case WAIT_AUTH_2:
3163                                 // Waiting for start of other side's netmerge to say they liked our
3164                                 // password.
3165                                 if (command == "SERVER")
3166                                 {
3167                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
3168                                         // silently ignore.
3169                                         return true;
3170                                 }
3171                                 else if ((command == "U") || (command == "S"))
3172                                 {
3173                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3174                                         return false;
3175                                 }
3176                                 else if (command == "BURST")
3177                                 {
3178                                         if (params.size() && Utils->EnableTimeSync)
3179                                         {
3180                                                 /* If a time stamp is provided, apply synchronization */
3181                                                 bool force = false;
3182                                                 time_t them = atoi(params[0].c_str());
3183                                                 time_t us = Instance->Time(true);
3184                                                 int delta = them - us;
3185
3186                                                 if ((params.size() == 2) && (params[1] == "FORCE"))
3187                                                         force = true;
3188
3189                                                 if ((delta < -600) || (delta > 600))
3190                                                 {
3191                                                         this->Instance->SNO->WriteToSnoMask('l',"\2ERROR\2: Your clocks are out by %d seconds (this is more than ten minutes). Link aborted, \2PLEASE SYNC YOUR CLOCKS!\2",abs(delta));
3192                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
3193                                                         return false;
3194                                                 }
3195
3196                                                 if (us == them)
3197                                                 {
3198                                                         this->Instance->Log(DEBUG, "Timestamps are equal; pat yourself on the back");
3199                                                 }
3200                                                 else if (force || (us > them))
3201                                                 {
3202                                                         this->Instance->Log(DEBUG, "Remote server has lower TS (%d seconds)", them - us);
3203                                                         this->Instance->SetTimeDelta(them - us);
3204                                                         // Send this new timestamp to any other servers
3205                                                         Utils->DoOneToMany(Utils->TreeRoot->GetName(), "TIMESET", params);
3206                                                 }
3207                                                 else
3208                                                 {
3209                                                         // Override the timestamp
3210                                                         this->Instance->Log(DEBUG, "We have a higher timestamp (by %d seconds), not updating delta", us - them);
3211                                                         this->WriteLine(":" + Utils->TreeRoot->GetName() + " TIMESET " + ConvToStr(us));
3212                                                 }
3213                                         }
3214                                         this->LinkState = CONNECTED;
3215                                         Node = new TreeServer(this->Utils,this->Instance,InboundServerName,InboundDescription,Utils->TreeRoot,this);
3216                                         Utils->TreeRoot->AddChild(Node);
3217                                         params.clear();
3218                                         params.push_back(InboundServerName);
3219                                         params.push_back("*");
3220                                         params.push_back("1");
3221                                         params.push_back(":"+InboundDescription);
3222                                         Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,InboundServerName);
3223                                         this->bursting = true;
3224                                         this->DoBurst(Node);
3225                                 }
3226                                 else if (command == "ERROR")
3227                                 {
3228                                         return this->Error(params);
3229                                 }
3230                                 else if (command == "CAPAB")
3231                                 {
3232                                         return this->Capab(params);
3233                                 }
3234
3235                         break;
3236                         case LISTENER:
3237                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
3238                                 return false;
3239                         break;
3240                         case CONNECTING:
3241                                 if (command == "SERVER")
3242                                 {
3243                                         // another server we connected to, which was in WAIT_AUTH_1 state,
3244                                         // has just sent us their credentials. If we get this far, theyre
3245                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
3246                                         // if we're happy with this, we should send our netburst which
3247                                         // kickstarts the merge.
3248                                         return this->Outbound_Reply_Server(params);
3249                                 }
3250                                 else if (command == "ERROR")
3251                                 {
3252                                         return this->Error(params);
3253                                 }
3254                         break;
3255                         case CONNECTED:
3256                                 // This is the 'authenticated' state, when all passwords
3257                                 // have been exchanged and anything past this point is taken
3258                                 // as gospel.
3259
3260                                 if (prefix != "")
3261                                 {
3262                                         std::string direction = prefix;
3263                                         userrec* t = this->Instance->FindNick(prefix);
3264                                         if (t)
3265                                         {
3266                                                 direction = t->server;
3267                                         }
3268                                         TreeServer* route_back_again = Utils->BestRouteTo(direction);
3269                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
3270                                         {
3271                                                 if (route_back_again)
3272                                                         Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
3273                                                 return true;
3274                                         }
3275
3276                                         /* Fix by brain:
3277                                          * When there is activity on the socket, reset the ping counter so
3278                                          * that we're not wasting bandwidth pinging an active server.
3279                                          */
3280                                         route_back_again->SetNextPingTime(time(NULL) + 60);
3281                                         route_back_again->SetPingFlag();
3282                                 }
3283
3284                                 if (command == "SVSMODE")
3285                                 {
3286                                         /* Services expects us to implement
3287                                          * SVSMODE. In inspircd its the same as
3288                                          * MODE anyway.
3289                                          */
3290                                         command = "MODE";
3291                                 }
3292                                 std::string target = "";
3293                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
3294                                  * working with std::string here.
3295                                  */
3296                                 if ((command == "NICK") && (params.size() > 1))
3297                                 {
3298                                         return this->IntroduceClient(prefix,params);
3299                                 }
3300                                 else if (command == "FJOIN")
3301                                 {
3302                                         return this->ForceJoin(prefix,params);
3303                                 }
3304                                 else if (command == "STATS")
3305                                 {
3306                                         return this->Stats(prefix, params);
3307                                 }
3308                                 else if (command == "MOTD")
3309                                 {
3310                                         return this->Motd(prefix, params);
3311                                 }
3312                                 else if (command == "ADMIN")
3313                                 {
3314                                         return this->Admin(prefix, params);
3315                                 }
3316                                 else if (command == "SERVER")
3317                                 {
3318                                         return this->RemoteServer(prefix,params);
3319                                 }
3320                                 else if (command == "ERROR")
3321                                 {
3322                                         return this->Error(params);
3323                                 }
3324                                 else if (command == "OPERTYPE")
3325                                 {
3326                                         return this->OperType(prefix,params);
3327                                 }
3328                                 else if (command == "FMODE")
3329                                 {
3330                                         return this->ForceMode(prefix,params);
3331                                 }
3332                                 else if (command == "KILL")
3333                                 {
3334                                         return this->RemoteKill(prefix,params);
3335                                 }
3336                                 else if (command == "FTOPIC")
3337                                 {
3338                                         return this->ForceTopic(prefix,params);
3339                                 }
3340                                 else if (command == "REHASH")
3341                                 {
3342                                         return this->RemoteRehash(prefix,params);
3343                                 }
3344                                 else if (command == "METADATA")
3345                                 {
3346                                         return this->MetaData(prefix,params);
3347                                 }
3348                                 else if (command == "REMSTATUS")
3349                                 {
3350                                         return this->RemoveStatus(prefix,params);
3351                                 }
3352                                 else if (command == "PING")
3353                                 {
3354                                         /*
3355                                          * We just got a ping from a server that's bursting.
3356                                          * This can't be right, so set them to not bursting, and
3357                                          * apply their lines.
3358                                          */
3359                                         if (this->bursting)
3360                                         {
3361                                                 this->bursting = false;
3362                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3363                                         }
3364                                         if (prefix == "")
3365                                         {
3366                                                 prefix = this->GetName();
3367                                         }
3368                                         return this->LocalPing(prefix,params);
3369                                 }
3370                                 else if (command == "PONG")
3371                                 {
3372                                         /*
3373                                          * We just got a pong from a server that's bursting.
3374                                          * This can't be right, so set them to not bursting, and
3375                                          * apply their lines.
3376                                          */
3377                                         if (this->bursting)
3378                                         {
3379                                                 this->bursting = false;
3380                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3381                                         }
3382                                         if (prefix == "")
3383                                         {
3384                                                 prefix = this->GetName();
3385                                         }
3386                                         return this->LocalPong(prefix,params);
3387                                 }
3388                                 else if (command == "VERSION")
3389                                 {
3390                                         return this->ServerVersion(prefix,params);
3391                                 }
3392                                 else if (command == "FHOST")
3393                                 {
3394                                         return this->ChangeHost(prefix,params);
3395                                 }
3396                                 else if (command == "FNAME")
3397                                 {
3398                                         return this->ChangeName(prefix,params);
3399                                 }
3400                                 else if (command == "ADDLINE")
3401                                 {
3402                                         return this->AddLine(prefix,params);
3403                                 }
3404                                 else if (command == "SVSNICK")
3405                                 {
3406                                         if (prefix == "")
3407                                         {
3408                                                 prefix = this->GetName();
3409                                         }
3410                                         return this->ForceNick(prefix,params);
3411                                 }
3412                                 else if (command == "RSQUIT")
3413                                 {
3414                                         return this->RemoteSquit(prefix, params);
3415                                 }
3416                                 else if (command == "IDLE")
3417                                 {
3418                                         return this->Whois(prefix,params);
3419                                 }
3420                                 else if (command == "PUSH")
3421                                 {
3422                                         return this->Push(prefix,params);
3423                                 }
3424                                 else if (command == "TIMESET")
3425                                 {
3426                                         return this->HandleSetTime(prefix, params);
3427                                 }
3428                                 else if (command == "TIME")
3429                                 {
3430                                         return this->Time(prefix,params);
3431                                 }
3432                                 else if ((command == "KICK") && (Utils->IsServer(prefix)))
3433                                 {
3434                                         std::string sourceserv = this->myhost;
3435                                         if (params.size() == 3)
3436                                         {
3437                                                 userrec* user = this->Instance->FindNick(params[1]);
3438                                                 chanrec* chan = this->Instance->FindChan(params[0]);
3439                                                 if (user && chan)
3440                                                 {
3441                                                         if (!chan->ServerKickUser(user, params[2].c_str(), false))
3442                                                                 /* Yikes, the channels gone! */
3443                                                                 delete chan;
3444                                                 }
3445                                         }
3446                                         if (this->InboundServerName != "")
3447                                         {
3448                                                 sourceserv = this->InboundServerName;
3449                                         }
3450                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3451                                 }
3452                                 else if (command == "SVSJOIN")
3453                                 {
3454                                         if (prefix == "")
3455                                         {
3456                                                 prefix = this->GetName();
3457                                         }
3458                                         return this->ServiceJoin(prefix,params);
3459                                 }
3460                                 else if (command == "SQUIT")
3461                                 {
3462                                         if (params.size() == 2)
3463                                         {
3464                                                 this->Squit(Utils->FindServer(params[0]),params[1]);
3465                                         }
3466                                         return true;
3467                                 }
3468                                 else if (command == "OPERNOTICE")
3469                                 {
3470                                         std::string sourceserv = this->myhost;
3471
3472                                         if (this->InboundServerName != "")
3473                                                 sourceserv = this->InboundServerName;
3474
3475                                         if (params.size() >= 1)
3476                                                 Instance->WriteOpers("*** From " + sourceserv + ": " + params[0]);
3477
3478                                         return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
3479                                 }
3480                                 else if (command == "MODENOTICE")
3481                                 {
3482                                         std::string sourceserv = this->myhost;
3483                                         if (this->InboundServerName != "")
3484                                                 sourceserv = this->InboundServerName;
3485                                         if (params.size() >= 2)
3486                                         {
3487                                                 Instance->WriteMode(params[0].c_str(), WM_AND, "*** From %s: %s", sourceserv.c_str(), params[1].c_str());
3488                                         }
3489
3490                                         return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
3491                                 }
3492                                 else if (command == "SNONOTICE")
3493                                 {
3494                                         std::string sourceserv = this->myhost;
3495                                         if (this->InboundServerName != "")
3496                                                 sourceserv = this->InboundServerName;
3497                                         if (params.size() >= 2)
3498                                         {
3499                                                 Instance->SNO->WriteToSnoMask(*(params[0].c_str()), "From " + sourceserv + ": "+ params[1]);
3500                                         }
3501
3502                                         return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
3503                                 }
3504                                 else if (command == "ENDBURST")
3505                                 {
3506                                         this->bursting = false;
3507                                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3508                                         std::string sourceserv = this->myhost;
3509                                         if (this->InboundServerName != "")
3510                                         {
3511                                                 sourceserv = this->InboundServerName;
3512                                         }
3513                                         this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
3514
3515                                         Event rmode((char*)sourceserv.c_str(), (Module*)Utils->Creator, "new_server");
3516                                         rmode.Send(Instance);
3517
3518                                         return true;
3519                                 }
3520                                 else
3521                                 {
3522                                         // not a special inter-server command.
3523                                         // Emulate the actual user doing the command,
3524                                         // this saves us having a huge ugly parser.
3525                                         userrec* who = this->Instance->FindNick(prefix);
3526                                         std::string sourceserv = this->myhost;
3527                                         if (this->InboundServerName != "")
3528                                         {
3529                                                 sourceserv = this->InboundServerName;
3530                                         }
3531                                         if ((!who) && (command == "MODE"))
3532                                         {
3533                                                 if (Utils->IsServer(prefix))
3534                                                 {
3535                                                         const char* modelist[127];
3536                                                         for (size_t i = 0; i < params.size(); i++)
3537                                                                 modelist[i] = params[i].c_str();
3538
3539                                                         userrec* fake = new userrec(Instance);
3540                                                         fake->SetFd(FD_MAGIC_NUMBER);
3541
3542                                                         this->Instance->SendMode(modelist, params.size(), fake);
3543
3544                                                         delete fake;
3545
3546                                                         /* Hot potato! pass it on! */
3547                                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3548                                                 }
3549                                         }
3550                                         if (who)
3551                                         {
3552                                                 if ((command == "NICK") && (params.size() > 0))
3553                                                 {
3554                                                         /* On nick messages, check that the nick doesnt
3555                                                          * already exist here. If it does, kill their copy,
3556                                                          * and our copy.
3557                                                          */
3558                                                         userrec* x = this->Instance->FindNick(params[0]);
3559                                                         if ((x) && (x != who))
3560                                                         {
3561                                                                 std::deque<std::string> p;
3562                                                                 p.push_back(params[0]);
3563                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
3564                                                                 Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3565                                                                 p.clear();
3566                                                                 p.push_back(prefix);
3567                                                                 p.push_back("Nickname collision");
3568                                                                 Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3569                                                                 userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
3570                                                                 userrec* y = this->Instance->FindNick(prefix);
3571                                                                 if (y)
3572                                                                 {
3573                                                                         userrec::QuitUser(this->Instance,y,"Nickname collision");
3574                                                                 }
3575                                                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3576                                                         }
3577                                                 }
3578                                                 // its a user
3579                                                 target = who->server;
3580                                                 const char* strparams[127];
3581                                                 for (unsigned int q = 0; q < params.size(); q++)
3582                                                 {
3583                                                         strparams[q] = params[q].c_str();
3584                                                 }
3585                                                 switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
3586                                                 {
3587                                                         case CMD_INVALID:
3588                                                                 this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
3589                                                                 return false;
3590                                                         break;
3591                                                         case CMD_FAILURE:
3592                                                                 return true;
3593                                                         break;
3594                                                         default:
3595                                                                 /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
3596                                                         break;
3597                                                 }
3598                                         }
3599                                         else
3600                                         {
3601                                                 // its not a user. Its either a server, or somethings screwed up.
3602                                                 if (Utils->IsServer(prefix))
3603                                                 {
3604                                                         target = this->Instance->Config->ServerName;
3605                                                 }
3606                                                 else
3607                                                 {
3608                                                         Instance->Log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
3609                                                         return true;
3610                                                 }
3611                                         }
3612                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3613
3614                                 }
3615                                 return true;
3616                         break;
3617                 }
3618                 return true;
3619         }
3620
3621         virtual std::string GetName()
3622         {
3623                 std::string sourceserv = this->myhost;
3624                 if (this->InboundServerName != "")
3625                 {
3626                         sourceserv = this->InboundServerName;
3627                 }
3628                 return sourceserv;
3629         }
3630
3631         virtual void OnTimeout()
3632         {
3633                 if (this->LinkState == CONNECTING)
3634                 {
3635                         this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out.");
3636                         Link* MyLink = Utils->FindLink(myhost);
3637                         if (MyLink)
3638                                 Utils->DoFailOver(MyLink);
3639                 }
3640         }
3641
3642         virtual void OnClose()
3643         {
3644                 // Connection closed.
3645                 // If the connection is fully up (state CONNECTED)
3646                 // then propogate a netsplit to all peers.
3647                 std::string quitserver = this->myhost;
3648                 if (this->InboundServerName != "")
3649                 {
3650                         quitserver = this->InboundServerName;
3651                 }
3652                 TreeServer* s = Utils->FindServer(quitserver);
3653                 if (s)
3654                 {
3655                         Squit(s,"Remote host closed the connection");
3656                 }
3657
3658                 if (quitserver != "")
3659                         this->Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' failed.",quitserver.c_str());
3660         }
3661
3662         virtual int OnIncomingConnection(int newsock, char* ip)
3663         {
3664                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
3665                  * or discovering if this port is the server port, we don't allow connections from any
3666                  * IPs for which we don't have a link block.
3667                  */
3668                 bool found = false;
3669
3670                 found = (std::find(Utils->ValidIPs.begin(), Utils->ValidIPs.end(), ip) != Utils->ValidIPs.end());
3671                 if (!found)
3672                 {
3673                         for (vector<std::string>::iterator i = Utils->ValidIPs.begin(); i != Utils->ValidIPs.end(); i++)
3674                                 if (irc::sockets::MatchCIDR(ip, (*i).c_str()))
3675                                         found = true;
3676
3677                         if (!found)
3678                         {
3679                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from %s denied (no link blocks with that IP address)", ip);
3680                                 close(newsock);
3681                                 return false;
3682                         }
3683                 }
3684
3685                 TreeSocket* s = new TreeSocket(this->Utils, this->Instance, newsock, ip, this->Hook);
3686
3687                 s = s; /* Whinge whinge whinge, thats all GCC ever does. */
3688                 return true;
3689         }
3690 };
3691
3692 /** This class is used to resolve server hostnames during /connect and autoconnect.
3693  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
3694  * resolver step first ourselves if we need it. This is totally nonblocking, and will
3695  * callback to OnLookupComplete or OnError when completed. Once it has completed we
3696  * will have an IP address which we can then use to continue our connection.
3697  */
3698 class ServernameResolver : public Resolver
3699 {
3700  private:
3701         /** A copy of the Link tag info for what we're connecting to.
3702          * We take a copy, rather than using a pointer, just in case the
3703          * admin takes the tag away and rehashes while the domain is resolving.
3704          */
3705         Link MyLink;
3706         SpanningTreeUtilities* Utils;
3707  public:
3708         ServernameResolver(Module* me, SpanningTreeUtilities* Util, InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD, me), MyLink(x), Utils(Util)
3709         {
3710                 /* Nothing in here, folks */
3711         }
3712
3713         void OnLookupComplete(const std::string &result)
3714         {
3715                 /* Initiate the connection, now that we have an IP to use.
3716                  * Passing a hostname directly to InspSocket causes it to
3717                  * just bail and set its FD to -1.
3718                  */
3719                 TreeServer* CheckDupe = Utils->FindServer(MyLink.Name.c_str());
3720                 if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
3721                 {
3722
3723                         if ((!MyLink.Hook.empty()) && (Utils->hooks.find(MyLink.Hook.c_str()) ==  Utils->hooks.end()))
3724                                 return;
3725
3726                         TreeSocket* newsocket = new TreeSocket(this->Utils, ServerInstance, result,MyLink.Port,false,MyLink.Timeout ? MyLink.Timeout : 10,MyLink.Name.c_str(),
3727                                         MyLink.Hook.empty() ? NULL : Utils->hooks[MyLink.Hook.c_str()]);
3728                         if (newsocket->GetFd() > -1)
3729                         {
3730                                 /* We're all OK */
3731                         }
3732                         else
3733                         {
3734                                 /* Something barfed, show the opers */
3735                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
3736                                 delete newsocket;
3737                                 Utils->DoFailOver(&MyLink);
3738                         }
3739                 }
3740         }
3741
3742         void OnError(ResolverError e, const std::string &errormessage)
3743         {
3744                 /* Ooops! */
3745                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
3746                 Utils->DoFailOver(&MyLink);
3747         }
3748 };
3749
3750 /** Handle resolving of server IPs for the cache
3751  */
3752 class SecurityIPResolver : public Resolver
3753 {
3754  private:
3755         Link MyLink;
3756         SpanningTreeUtilities* Utils;
3757  public:
3758         SecurityIPResolver(Module* me, SpanningTreeUtilities* U, InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD, me), MyLink(x), Utils(U)
3759         {
3760         }
3761
3762         void OnLookupComplete(const std::string &result)
3763         {
3764                 ServerInstance->Log(DEBUG,"Security IP cache: Adding IP address '%s' for Link '%s'",result.c_str(),MyLink.Name.c_str());
3765                 Utils->ValidIPs.push_back(result);
3766         }
3767
3768         void OnError(ResolverError e, const std::string &errormessage)
3769         {
3770                 ServerInstance->Log(DEBUG,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str());
3771         }
3772 };
3773
3774 SpanningTreeUtilities::SpanningTreeUtilities(InspIRCd* Instance, ModuleSpanningTree* C) : ServerInstance(Instance), Creator(C)
3775 {
3776         Bindings.clear();
3777
3778         this->TreeRoot = new TreeServer(this, ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc);
3779
3780         modulelist* ml = ServerInstance->FindInterface("InspSocketHook");
3781
3782         /* Did we find any modules? */
3783         if (ml)
3784         {
3785                 /* Yes, enumerate them all to find out the hook name */
3786                 for (modulelist::iterator m = ml->begin(); m != ml->end(); m++)
3787                 {
3788                         /* Make a request to it for its name, its implementing
3789                          * InspSocketHook so we know its safe to do this
3790                          */
3791                         std::string name = InspSocketNameRequest((Module*)Creator, *m).Send();
3792                         /* Build a map of them */
3793                         hooks[name.c_str()] = *m;
3794                         hooknames.push_back(name);
3795                         ServerInstance->Log(DEBUG, "Found InspSocketHook interface: '%s' -> '%08x'", name.c_str(), *m);
3796                 }
3797         }
3798
3799         this->ReadConfiguration(true);
3800 }
3801
3802 SpanningTreeUtilities::~SpanningTreeUtilities()
3803 {
3804         for (unsigned int i = 0; i < Bindings.size(); i++)
3805         {
3806                 ServerInstance->Log(DEBUG,"Freeing binding %d of %d",i, Bindings.size());
3807                 ServerInstance->SE->DelFd(Bindings[i]);
3808                 Bindings[i]->Close();
3809                 DELETE(Bindings[i]);
3810         }
3811         ServerInstance->Log(DEBUG,"Freeing connected servers...");
3812         while (TreeRoot->ChildCount())
3813         {
3814                 TreeServer* child_server = TreeRoot->GetChild(0);
3815                 ServerInstance->Log(DEBUG,"Freeing connected server %s", child_server->GetName().c_str());
3816                 if (child_server)
3817                 {
3818                         TreeSocket* sock = child_server->GetSocket();
3819                         ServerInstance->SE->DelFd(sock);
3820                         sock->Close();
3821                         DELETE(sock);
3822                 }
3823         }
3824         delete TreeRoot;
3825 }
3826
3827 void SpanningTreeUtilities::AddThisServer(TreeServer* server, TreeServerList &list)
3828 {
3829         if (list.find(server) == list.end())
3830                 list[server] = server;
3831 }
3832
3833 /** returns a list of DIRECT servernames for a specific channel */
3834 void SpanningTreeUtilities::GetListOfServersForChannel(chanrec* c, TreeServerList &list, char status, const CUList &exempt_list)
3835 {
3836         CUList *ulist;
3837         switch (status)
3838         {
3839                 case '@':
3840                         ulist = c->GetOppedUsers();
3841                 break;
3842                 case '%':
3843                         ulist = c->GetHalfoppedUsers();
3844                 break;
3845                 case '+':
3846                         ulist = c->GetVoicedUsers();
3847                 break;
3848                 default:
3849                         ulist = c->GetUsers();
3850                 break;
3851         }
3852         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
3853         {
3854                 if ((i->second->GetFd() < 0) && (exempt_list.find(i->second) == exempt_list.end()))
3855                 {
3856                         TreeServer* best = this->BestRouteTo(i->second->server);
3857                         if (best)
3858                                 AddThisServer(best,list);
3859                 }
3860         }
3861         return;
3862 }
3863
3864 bool SpanningTreeUtilities::DoOneToAllButSenderRaw(const std::string &data, const std::string &omit, const std::string &prefix, const irc::string &command, std::deque<std::string> &params)
3865 {
3866         char pfx = 0;
3867         TreeServer* omitroute = this->BestRouteTo(omit);
3868         if ((command == "NOTICE") || (command == "PRIVMSG"))
3869         {
3870                 if (params.size() >= 2)
3871                 {
3872                         /* Prefixes */
3873                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
3874                         {
3875                                 pfx = params[0][0];
3876                                 params[0] = params[0].substr(1, params[0].length()-1);
3877                         }
3878                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
3879                         {
3880                                 // special routing for private messages/notices
3881                                 userrec* d = ServerInstance->FindNick(params[0]);
3882                                 if (d)
3883                                 {
3884                                         std::deque<std::string> par;
3885                                         par.push_back(params[0]);
3886                                         par.push_back(":"+params[1]);
3887                                         this->DoOneToOne(prefix,command.c_str(),par,d->server);
3888                                         return true;
3889                                 }
3890                         }
3891                         else if (*(params[0].c_str()) == '$')
3892                         {
3893                                 std::deque<std::string> par;
3894                                 par.push_back(params[0]);
3895                                 par.push_back(":"+params[1]);
3896                                 this->DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
3897                                 return true;
3898                         }
3899                         else
3900                         {
3901                                 chanrec* c = ServerInstance->FindChan(params[0]);
3902                                 userrec* u = ServerInstance->FindNick(prefix);
3903                                 if (c && u)
3904                                 {
3905                                         CUList elist;
3906                                         TreeServerList list;
3907                                         FOREACH_MOD(I_OnBuildExemptList, OnBuildExemptList((command == "PRIVMSG" ? MSG_PRIVMSG : MSG_NOTICE), c, u, pfx, elist));
3908                                         GetListOfServersForChannel(c,list,pfx,elist);
3909
3910                                         for (TreeServerList::iterator i = list.begin(); i != list.end(); i++)
3911                                         {
3912                                                 TreeSocket* Sock = i->second->GetSocket();
3913                                                 if ((Sock) && (i->second->GetName() != omit) && (omitroute != i->second))
3914                                                 {
3915                                                         Sock->WriteLine(data);
3916                                                 }
3917                                         }
3918                                         return true;
3919                                 }
3920                         }
3921                 }
3922         }
3923         unsigned int items =this->TreeRoot->ChildCount();
3924         for (unsigned int x = 0; x < items; x++)
3925         {
3926                 TreeServer* Route = this->TreeRoot->GetChild(x);
3927                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3928                 {
3929                         TreeSocket* Sock = Route->GetSocket();
3930                         if (Sock)
3931                                 Sock->WriteLine(data);
3932                 }
3933         }
3934         return true;
3935 }
3936
3937 bool SpanningTreeUtilities::DoOneToAllButSender(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string omit)
3938 {
3939         TreeServer* omitroute = this->BestRouteTo(omit);
3940         std::string FullLine = ":" + prefix + " " + command;
3941         unsigned int words = params.size();
3942         for (unsigned int x = 0; x < words; x++)
3943         {
3944                 FullLine = FullLine + " " + params[x];
3945         }
3946         unsigned int items = this->TreeRoot->ChildCount();
3947         for (unsigned int x = 0; x < items; x++)
3948         {
3949                 TreeServer* Route = this->TreeRoot->GetChild(x);
3950                 // Send the line IF:
3951                 // The route has a socket (its a direct connection)
3952                 // The route isnt the one to be omitted
3953                 // The route isnt the path to the one to be omitted
3954                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3955                 {
3956                         TreeSocket* Sock = Route->GetSocket();
3957                         if (Sock)
3958                                 Sock->WriteLine(FullLine);
3959                 }
3960         }
3961         return true;
3962 }
3963
3964 bool SpanningTreeUtilities::DoOneToMany(const std::string &prefix, const std::string &command, std::deque<std::string> &params)
3965 {
3966         std::string FullLine = ":" + prefix + " " + command;
3967         unsigned int words = params.size();
3968         for (unsigned int x = 0; x < words; x++)
3969         {
3970                 FullLine = FullLine + " " + params[x];
3971         }
3972         unsigned int items = this->TreeRoot->ChildCount();
3973         for (unsigned int x = 0; x < items; x++)
3974         {
3975                 TreeServer* Route = this->TreeRoot->GetChild(x);
3976                 if (Route && Route->GetSocket())
3977                 {
3978                         TreeSocket* Sock = Route->GetSocket();
3979                         if (Sock)
3980                                 Sock->WriteLine(FullLine);
3981                 }
3982         }
3983         return true;
3984 }
3985
3986 bool SpanningTreeUtilities::DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params)
3987 {
3988         std::string spfx = prefix;
3989         std::string scmd = command;
3990         return this->DoOneToMany(spfx, scmd, params);
3991 }
3992
3993 bool SpanningTreeUtilities::DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit)
3994 {
3995         std::string spfx = prefix;
3996         std::string scmd = command;
3997         return this->DoOneToAllButSender(spfx, scmd, params, omit);
3998 }
3999
4000 bool SpanningTreeUtilities::DoOneToOne(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string target)
4001 {
4002         TreeServer* Route = this->BestRouteTo(target);
4003         if (Route)
4004         {
4005                 std::string FullLine = ":" + prefix + " " + command;
4006                 unsigned int words = params.size();
4007                 for (unsigned int x = 0; x < words; x++)
4008                 {
4009                         FullLine = FullLine + " " + params[x];
4010                 }
4011                 if (Route && Route->GetSocket())
4012                 {
4013                         TreeSocket* Sock = Route->GetSocket();
4014                         if (Sock)
4015                                 Sock->WriteLine(FullLine);
4016                 }
4017                 return true;
4018         }
4019         else
4020         {
4021                 return false;
4022         }
4023 }
4024
4025 void SpanningTreeUtilities::ReadConfiguration(bool rebind)
4026 {
4027         ConfigReader* Conf = new ConfigReader(ServerInstance);
4028         if (rebind)
4029         {
4030                 for (int j =0; j < Conf->Enumerate("bind"); j++)
4031                 {
4032                         std::string Type = Conf->ReadValue("bind","type",j);
4033                         std::string IP = Conf->ReadValue("bind","address",j);
4034                         std::string Port = Conf->ReadValue("bind","port",j);
4035                         std::string transport = Conf->ReadValue("bind","transport",j);
4036                         if (Type == "servers")
4037                         {
4038                                 irc::portparser portrange(Port, false);
4039                                 int portno = -1;
4040                                 while ((portno = portrange.GetToken()))
4041                                 {
4042                                         ServerInstance->Log(DEBUG,"m_spanningtree: Binding server port %s:%d", IP.c_str(), portno);
4043                                         if (IP == "*")
4044                                                 IP = "";
4045
4046                                         if ((!transport.empty()) && (hooks.find(transport.c_str()) ==  hooks.end()))
4047                                         {
4048                                                 ServerInstance->Log(DEFAULT,"m_spanningtree: WARNING: Can't find transport type '%s' for port %s:%s - maybe you forgot to load it BEFORE m_spanningtree in your config file? - Skipping this port binding",
4049                                                                 transport.c_str(), IP.c_str(), Port.c_str());
4050                                                 break;
4051                                         }
4052
4053                                         TreeSocket* listener = new TreeSocket(this, ServerInstance, IP.c_str(), portno, true, 10, transport.empty() ? NULL : hooks[transport.c_str()]);
4054                                         if (listener->GetState() == I_LISTENING)
4055                                         {
4056                                                 ServerInstance->Log(DEFAULT,"m_spanningtree: Binding server port %s:%d successful!", IP.c_str(), portno);
4057                                                 Bindings.push_back(listener);
4058                                         }
4059                                         else
4060                                         {
4061                                                 ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %s:%d",IP.c_str(), portno);
4062                                                 listener->Close();
4063                                                 DELETE(listener);
4064                                         }
4065                                         ServerInstance->Log(DEBUG,"Done with this binding");
4066                                 }
4067                         }
4068                 }
4069         }
4070         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
4071         HideULines = Conf->ReadFlag("options","hideulines",0);
4072         AnnounceTSChange = Conf->ReadFlag("options","announcets",0);
4073         EnableTimeSync = !(Conf->ReadFlag("options","notimesync",0));
4074         LinkBlocks.clear();
4075         ValidIPs.clear();
4076         for (int j =0; j < Conf->Enumerate("link"); j++)
4077         {
4078                 Link L;
4079                 std::string Allow = Conf->ReadValue("link","allowmask",j);
4080                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
4081                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
4082                 L.FailOver = Conf->ReadValue("link","failover",j).c_str();
4083                 L.Port = Conf->ReadInteger("link","port",j,true);
4084                 L.SendPass = Conf->ReadValue("link","sendpass",j);
4085                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
4086                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
4087                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
4088                 L.Timeout = Conf->ReadInteger("link","timeout",j,true);
4089                 L.Hook = Conf->ReadValue("link", "transport", j);
4090
4091                 if ((!L.Hook.empty()) && (hooks.find(L.Hook.c_str()) ==  hooks.end()))
4092                 {
4093                         ServerInstance->Log(DEFAULT,"m_spanningtree: WARNING: Can't find transport type '%s' for link '%s' - maybe you forgot to load it BEFORE m_spanningtree in your config file? Skipping <link> tag completely.",
4094                                         L.Hook.c_str(), L.Name.c_str());
4095                         continue;
4096
4097                 }
4098
4099                 L.NextConnectTime = time(NULL) + L.AutoConnect;
4100                 /* Bugfix by brain, do not allow people to enter bad configurations */
4101                 if (L.Name != ServerInstance->Config->ServerName)
4102                 {
4103                         if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
4104                         {
4105                                 ValidIPs.push_back(L.IPAddr);
4106
4107                                 if (Allow.length())
4108                                         ValidIPs.push_back(Allow);
4109
4110                                 /* Needs resolving */
4111                                 insp_inaddr binip;
4112                                 if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
4113                                 {
4114                                         try
4115                                         {
4116                                                 SecurityIPResolver* sr = new SecurityIPResolver((Module*)this->Creator, this, ServerInstance, L.IPAddr, L);
4117                                                 ServerInstance->AddResolver(sr);
4118                                         }
4119                                         catch (ModuleException& e)
4120                                         {
4121                                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4122                                         }
4123                                 }
4124
4125                                 LinkBlocks.push_back(L);
4126                                 ServerInstance->Log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
4127                         }
4128                         else
4129                         {
4130                                 if (L.IPAddr == "")
4131                                 {
4132                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
4133                                 }
4134                                 else if (L.RecvPass == "")
4135                                 {
4136                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
4137                                 }
4138                                 else if (L.SendPass == "")
4139                                 {
4140                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
4141                                 }
4142                                 else if (L.Name == "")
4143                                 {
4144                                         ServerInstance->Log(DEFAULT,"Invalid configuration, link tag without a name!");
4145                                 }
4146                                 else if (!L.Port)
4147                                 {
4148                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
4149                                 }
4150                         }
4151                 }
4152                 else
4153                 {
4154                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', link tag has the same server name as the local server!",L.Name.c_str());
4155                 }
4156         }
4157         DELETE(Conf);
4158 }
4159
4160 /** To create a timer which recurs every second, we inherit from InspTimer.
4161  * InspTimer is only one-shot however, so at the end of each Tick() we simply
4162  * insert another of ourselves into the pending queue :)
4163  */
4164 class TimeSyncTimer : public InspTimer
4165 {
4166  private:
4167         InspIRCd *Instance;
4168         ModuleSpanningTree *Module;
4169  public:
4170         TimeSyncTimer(InspIRCd *Instance, ModuleSpanningTree *Mod);
4171         virtual void Tick(time_t TIME);
4172 };
4173
4174 HandshakeTimer::HandshakeTimer(InspIRCd* Inst, TreeSocket* s, Link* l, SpanningTreeUtilities* u) : InspTimer(1, time(NULL)), Instance(Inst), sock(s), lnk(l), Utils(u)
4175 {
4176         thefd = sock->GetFd();
4177 }
4178
4179 void HandshakeTimer::Tick(time_t TIME)
4180 {
4181         if (Instance->SE->GetRef(thefd) == sock)
4182         {
4183                 if (sock->GetHook() && InspSocketHSCompleteRequest(sock, (Module*)Utils->Creator, sock->GetHook()).Send())
4184                 {
4185                         Instance->Log(DEBUG,"Handshake timer activated, sending SERVER and/or CAPAB");
4186                         InspSocketAttachCertRequest(sock, (Module*)Utils->Creator, sock->GetHook()).Send();
4187                         sock->SendCapabilities();
4188                         if (sock->GetLinkState() == CONNECTING)
4189                         {
4190                                 sock->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+lnk->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
4191                         }
4192                 }
4193                 else
4194                 {
4195                         Instance->Timers->AddTimer(new HandshakeTimer(Instance, sock, lnk, Utils));
4196                 }
4197         }
4198 }
4199
4200 class ModuleSpanningTree : public Module
4201 {
4202         int line;
4203         int NumServers;
4204         unsigned int max_local;
4205         unsigned int max_global;
4206         cmd_rconnect* command_rconnect;
4207         SpanningTreeUtilities* Utils;
4208
4209  public:
4210         TimeSyncTimer *SyncTimer;
4211
4212         ModuleSpanningTree(InspIRCd* Me)
4213                 : Module::Module(Me), max_local(0), max_global(0)
4214         {
4215                 ServerInstance->UseInterface("InspSocketHook");
4216
4217                 Utils = new SpanningTreeUtilities(Me, this);
4218
4219                 command_rconnect = new cmd_rconnect(ServerInstance, this, Utils);
4220                 ServerInstance->AddCommand(command_rconnect);
4221
4222                 if (Utils->EnableTimeSync)
4223                 {
4224                         SyncTimer = new TimeSyncTimer(ServerInstance, this);
4225                         ServerInstance->Timers->AddTimer(SyncTimer);
4226                 }
4227                 else
4228                         SyncTimer = NULL;
4229         }
4230
4231         void ShowLinks(TreeServer* Current, userrec* user, int hops)
4232         {
4233                 std::string Parent = Utils->TreeRoot->GetName();
4234                 if (Current->GetParent())
4235                 {
4236                         Parent = Current->GetParent()->GetName();
4237                 }
4238                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
4239                 {
4240                         if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
4241                         {
4242                                 if (*user->oper)
4243                                 {
4244                                          ShowLinks(Current->GetChild(q),user,hops+1);
4245                                 }
4246                         }
4247                         else
4248                         {
4249                                 ShowLinks(Current->GetChild(q),user,hops+1);
4250                         }
4251                 }
4252                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
4253                 if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetName().c_str())) && (!*user->oper))
4254                         return;
4255                 user->WriteServ("364 %s %s %s :%d %s",user->nick,Current->GetName().c_str(),(Utils->FlatLinks && (!*user->oper)) ? ServerInstance->Config->ServerName : Parent.c_str(),(Utils->FlatLinks && (!*user->oper)) ? 0 : hops,Current->GetDesc().c_str());
4256         }
4257
4258         int CountLocalServs()
4259         {
4260                 return Utils->TreeRoot->ChildCount();
4261         }
4262
4263         int CountServs()
4264         {
4265                 return Utils->serverlist.size();
4266         }
4267
4268         void HandleLinks(const char** parameters, int pcnt, userrec* user)
4269         {
4270                 ShowLinks(Utils->TreeRoot,user,0);
4271                 user->WriteServ("365 %s * :End of /LINKS list.",user->nick);
4272                 return;
4273         }
4274
4275         void HandleLusers(const char** parameters, int pcnt, userrec* user)
4276         {
4277                 unsigned int n_users = ServerInstance->UserCount();
4278
4279                 /* Only update these when someone wants to see them, more efficient */
4280                 if ((unsigned int)ServerInstance->LocalUserCount() > max_local)
4281                         max_local = ServerInstance->LocalUserCount();
4282                 if (n_users > max_global)
4283                         max_global = n_users;
4284
4285                 unsigned int ulined_count = 0;
4286                 unsigned int ulined_local_count = 0;
4287
4288                 /* If ulined are hidden and we're not an oper, count the number of ulined servers hidden,
4289                  * locally and globally (locally means directly connected to us)
4290                  */
4291                 if ((Utils->HideULines) && (!*user->oper))
4292                 {
4293                         for (server_hash::iterator q = Utils->serverlist.begin(); q != Utils->serverlist.end(); q++)
4294                         {
4295                                 if (ServerInstance->ULine(q->second->GetName().c_str()))
4296                                 {
4297                                         ulined_count++;
4298                                         if (q->second->GetParent() == Utils->TreeRoot)
4299                                                 ulined_local_count++;
4300                                 }
4301                         }
4302                 }
4303
4304                 user->WriteServ("251 %s :There are %d users and %d invisible on %d servers",user->nick,n_users-ServerInstance->InvisibleUserCount(),ServerInstance->InvisibleUserCount(),ulined_count ? this->CountServs() - ulined_count : this->CountServs());
4305                 if (ServerInstance->OperCount())
4306                         user->WriteServ("252 %s %d :operator(s) online",user->nick,ServerInstance->OperCount());
4307                 if (ServerInstance->UnregisteredUserCount())
4308                         user->WriteServ("253 %s %d :unknown connections",user->nick,ServerInstance->UnregisteredUserCount());
4309                 if (ServerInstance->ChannelCount())
4310                         user->WriteServ("254 %s %d :channels formed",user->nick,ServerInstance->ChannelCount());
4311                 user->WriteServ("254 %s :I have %d clients and %d servers",user->nick,ServerInstance->LocalUserCount(),ulined_local_count ? this->CountLocalServs() - ulined_local_count : this->CountLocalServs());
4312                 user->WriteServ("265 %s :Current Local Users: %d  Max: %d",user->nick,ServerInstance->LocalUserCount(),max_local);
4313                 user->WriteServ("266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
4314                 return;
4315         }
4316
4317         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
4318
4319         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
4320         {
4321                 if (line < 128)
4322                 {
4323                         for (int t = 0; t < depth; t++)
4324                         {
4325                                 matrix[line][t] = ' ';
4326                         }
4327
4328                         // For Aligning, we need to work out exactly how deep this thing is, and produce
4329                         // a 'Spacer' String to compensate.
4330                         char spacer[40];
4331
4332                         memset(spacer,' ',40);
4333                         if ((40 - Current->GetName().length() - depth) > 1) {
4334                                 spacer[40 - Current->GetName().length() - depth] = '\0';
4335                         }
4336                         else
4337                         {
4338                                 spacer[5] = '\0';
4339                         }
4340
4341                         float percent;
4342                         char text[80];
4343                         if (ServerInstance->clientlist->size() == 0) {
4344                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
4345                                 percent = 0;
4346                         }
4347                         else
4348                         {
4349                                 percent = ((float)Current->GetUserCount() / (float)ServerInstance->clientlist->size()) * 100;
4350                         }
4351                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
4352                         totusers += Current->GetUserCount();
4353                         totservers++;
4354                         strlcpy(&matrix[line][depth],text,80);
4355                         line++;
4356                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
4357                         {
4358                                 if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
4359                                 {
4360                                         if (*user->oper)
4361                                         {
4362                                                 ShowMap(Current->GetChild(q),user,(Utils->FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
4363                                         }
4364                                 }
4365                                 else
4366                                 {
4367                                         ShowMap(Current->GetChild(q),user,(Utils->FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
4368                                 }
4369                         }
4370                 }
4371         }
4372
4373         int HandleMotd(const char** parameters, int pcnt, userrec* user)
4374         {
4375                 if (pcnt > 0)
4376                 {
4377                         /* Remote MOTD, the server is within the 1st parameter */
4378                         std::deque<std::string> params;
4379                         params.push_back(parameters[0]);
4380
4381                         /* Send it out remotely, generate no reply yet */
4382                         TreeServer* s = Utils->FindServerMask(parameters[0]);
4383                         if (s)
4384                         {
4385                                 Utils->DoOneToOne(user->nick, "MOTD", params, s->GetName());
4386                         }
4387                         else
4388                         {
4389                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4390                         }
4391                         return 1;
4392                 }
4393                 return 0;
4394         }
4395
4396         int HandleAdmin(const char** parameters, int pcnt, userrec* user)
4397         {
4398                 if (pcnt > 0)
4399                 {
4400                         /* Remote ADMIN, the server is within the 1st parameter */
4401                         std::deque<std::string> params;
4402                         params.push_back(parameters[0]);
4403
4404                         /* Send it out remotely, generate no reply yet */
4405                         TreeServer* s = Utils->FindServerMask(parameters[0]);
4406                         if (s)
4407                         {
4408                                 Utils->DoOneToOne(user->nick, "ADMIN", params, s->GetName());
4409                         }
4410                         else
4411                         {
4412                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4413                         }
4414                         return 1;
4415                 }
4416                 return 0;
4417         }
4418
4419         int HandleStats(const char** parameters, int pcnt, userrec* user)
4420         {
4421                 if (pcnt > 1)
4422                 {
4423                         /* Remote STATS, the server is within the 2nd parameter */
4424                         std::deque<std::string> params;
4425                         params.push_back(parameters[0]);
4426                         params.push_back(parameters[1]);
4427                         /* Send it out remotely, generate no reply yet */
4428                         TreeServer* s = Utils->FindServerMask(parameters[1]);
4429                         if (s)
4430                         {
4431                                 params[1] = s->GetName();
4432                                 Utils->DoOneToOne(user->nick, "STATS", params, s->GetName());
4433                         }
4434                         else
4435                         {
4436                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4437                         }
4438                         return 1;
4439                 }
4440                 return 0;
4441         }
4442
4443         // Ok, prepare to be confused.
4444         // After much mulling over how to approach this, it struck me that
4445         // the 'usual' way of doing a /MAP isnt the best way. Instead of
4446         // keeping track of a ton of ascii characters, and line by line
4447         // under recursion working out where to place them using multiplications
4448         // and divisons, we instead render the map onto a backplane of characters
4449         // (a character matrix), then draw the branches as a series of "L" shapes
4450         // from the nodes. This is not only friendlier on CPU it uses less stack.
4451
4452         void HandleMap(const char** parameters, int pcnt, userrec* user)
4453         {
4454                 // This array represents a virtual screen which we will
4455                 // "scratch" draw to, as the console device of an irc
4456                 // client does not provide for a proper terminal.
4457                 float totusers = 0;
4458                 float totservers = 0;
4459                 char matrix[128][80];
4460                 for (unsigned int t = 0; t < 128; t++)
4461                 {
4462                         matrix[t][0] = '\0';
4463                 }
4464                 line = 0;
4465                 // The only recursive bit is called here.
4466                 ShowMap(Utils->TreeRoot,user,0,matrix,totusers,totservers);
4467                 // Process each line one by one. The algorithm has a limit of
4468                 // 128 servers (which is far more than a spanning tree should have
4469                 // anyway, so we're ok). This limit can be raised simply by making
4470                 // the character matrix deeper, 128 rows taking 10k of memory.
4471                 for (int l = 1; l < line; l++)
4472                 {
4473                         // scan across the line looking for the start of the
4474                         // servername (the recursive part of the algorithm has placed
4475                         // the servers at indented positions depending on what they
4476                         // are related to)
4477                         int first_nonspace = 0;
4478                         while (matrix[l][first_nonspace] == ' ')
4479                         {
4480                                 first_nonspace++;
4481                         }
4482                         first_nonspace--;
4483                         // Draw the `- (corner) section: this may be overwritten by
4484                         // another L shape passing along the same vertical pane, becoming
4485                         // a |- (branch) section instead.
4486                         matrix[l][first_nonspace] = '-';
4487                         matrix[l][first_nonspace-1] = '`';
4488                         int l2 = l - 1;
4489                         // Draw upwards until we hit the parent server, causing possibly
4490                         // other corners (`-) to become branches (|-)
4491                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
4492                         {
4493                                 matrix[l2][first_nonspace-1] = '|';
4494                                 l2--;
4495                         }
4496                 }
4497                 // dump the whole lot to the user. This is the easy bit, honest.
4498                 for (int t = 0; t < line; t++)
4499                 {
4500                         user->WriteServ("006 %s :%s",user->nick,&matrix[t][0]);
4501                 }
4502                 float avg_users = totusers / totservers;
4503                 user->WriteServ("270 %s :%.0f server%s and %.0f user%s, average %.2f users per server",user->nick,totservers,(totservers > 1 ? "s" : ""),totusers,(totusers > 1 ? "s" : ""),avg_users);
4504         user->WriteServ("007 %s :End of /MAP",user->nick);
4505                 return;
4506         }
4507
4508         int HandleSquit(const char** parameters, int pcnt, userrec* user)
4509         {
4510                 TreeServer* s = Utils->FindServerMask(parameters[0]);
4511                 if (s)
4512                 {
4513                         if (s == Utils->TreeRoot)
4514                         {
4515                                 user->WriteServ("NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
4516                                 return 1;
4517                         }
4518                         TreeSocket* sock = s->GetSocket();
4519                         if (sock)
4520                         {
4521                                 ServerInstance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
4522                                 ServerInstance->SNO->WriteToSnoMask('l',"SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
4523                                 sock->Squit(s,std::string("Server quit by ") + user->GetFullRealHost());
4524                                 ServerInstance->SE->DelFd(sock);
4525                                 sock->Close();
4526                                 delete sock;
4527                         }
4528                         else
4529                         {
4530                                 /* route it */
4531                                 std::deque<std::string> params;
4532                                 params.push_back(parameters[0]);
4533                                 params.push_back(std::string(":Server quit by ") + user->GetFullRealHost());
4534                                 Utils->DoOneToOne(user->nick, "RSQUIT", params, parameters[0]);
4535                         }
4536                 }
4537                 else
4538                 {
4539                          user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
4540                 }
4541                 return 1;
4542         }
4543
4544         int HandleTime(const char** parameters, int pcnt, userrec* user)
4545         {
4546                 if ((IS_LOCAL(user)) && (pcnt))
4547                 {
4548                         TreeServer* found = Utils->FindServerMask(parameters[0]);
4549                         if (found)
4550                         {
4551                                 // we dont' override for local server
4552                                 if (found == Utils->TreeRoot)
4553                                         return 0;
4554
4555                                 std::deque<std::string> params;
4556                                 params.push_back(found->GetName());
4557                                 params.push_back(user->nick);
4558                                 Utils->DoOneToOne(ServerInstance->Config->ServerName,"TIME",params,found->GetName());
4559                         }
4560                         else
4561                         {
4562                                 user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4563                         }
4564                 }
4565                 return 1;
4566         }
4567
4568         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
4569         {
4570                 if ((IS_LOCAL(user)) && (pcnt > 1))
4571                 {
4572                         userrec* remote = ServerInstance->FindNick(parameters[1]);
4573                         if ((remote) && (remote->GetFd() < 0))
4574                         {
4575                                 std::deque<std::string> params;
4576                                 params.push_back(parameters[1]);
4577                                 Utils->DoOneToOne(user->nick,"IDLE",params,remote->server);
4578                                 return 1;
4579                         }
4580                         else if (!remote)
4581                         {
4582                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[1]);
4583                                 user->WriteServ("318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
4584                                 return 1;
4585                         }
4586                 }
4587                 return 0;
4588         }
4589
4590         void DoPingChecks(time_t curtime)
4591         {
4592                 for (unsigned int j = 0; j < Utils->TreeRoot->ChildCount(); j++)
4593                 {
4594                         TreeServer* serv = Utils->TreeRoot->GetChild(j);
4595                         TreeSocket* sock = serv->GetSocket();
4596                         if (sock)
4597                         {
4598                                 if (curtime >= serv->NextPingTime())
4599                                 {
4600                                         if (serv->AnsweredLastPing())
4601                                         {
4602                                                 sock->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" PING "+serv->GetName());
4603                                                 serv->SetNextPingTime(curtime + 60);
4604                                         }
4605                                         else
4606                                         {
4607                                                 // they didnt answer, boot them
4608                                                 ServerInstance->SNO->WriteToSnoMask('l',"Server \002%s\002 pinged out",serv->GetName().c_str());
4609                                                 sock->Squit(serv,"Ping timeout");
4610                                                 ServerInstance->SE->DelFd(sock);
4611                                                 sock->Close();
4612                                                 delete sock;
4613                                                 return;
4614                                         }
4615                                 }
4616                         }
4617                 }
4618         }
4619
4620         void ConnectServer(Link* x)
4621         {
4622                 insp_inaddr binip;
4623
4624                 /* Do we already have an IP? If so, no need to resolve it. */
4625                 if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
4626                 {
4627                         /* Gave a hook, but it wasnt one we know */
4628                         if ((!x->Hook.empty()) && (Utils->hooks.find(x->Hook.c_str()) == Utils->hooks.end()))
4629                                 return;
4630
4631                         TreeSocket* newsocket = new TreeSocket(Utils, ServerInstance, x->IPAddr,x->Port,false,x->Timeout ? x->Timeout : 10,x->Name.c_str(), x->Hook.empty() ? NULL : Utils->hooks[x->Hook.c_str()]);
4632                         if (newsocket->GetFd() > -1)
4633                         {
4634                                 /* Handled automatically on success */
4635                         }
4636                         else
4637                         {
4638                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
4639                                 delete newsocket;
4640                                 Utils->DoFailOver(x);
4641                         }
4642                 }
4643                 else
4644                 {
4645                         try
4646                         {
4647                                 ServernameResolver* snr = new ServernameResolver((Module*)this, Utils, ServerInstance,x->IPAddr, *x);
4648                                 ServerInstance->AddResolver(snr);
4649                         }
4650                         catch (ModuleException& e)
4651                         {
4652                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4653                                 Utils->DoFailOver(x);
4654                         }
4655                 }
4656         }
4657
4658         void AutoConnectServers(time_t curtime)
4659         {
4660                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
4661                 {
4662                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
4663                         {
4664                                 ServerInstance->Log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
4665                                 x->NextConnectTime = curtime + x->AutoConnect;
4666                                 TreeServer* CheckDupe = Utils->FindServer(x->Name.c_str());
4667                                 if (x->FailOver.length())
4668                                 {
4669                                         TreeServer* CheckFailOver = Utils->FindServer(x->FailOver.c_str());
4670                                         if (CheckFailOver)
4671                                         {
4672                                                 /* The failover for this server is currently a member of the network.
4673                                                  * The failover probably succeeded, where the main link did not.
4674                                                  * Don't try the main link until the failover is gone again.
4675                                                  */
4676                                                 continue;
4677                                         }
4678                                 }
4679                                 if (!CheckDupe)
4680                                 {
4681                                         // an autoconnected server is not connected. Check if its time to connect it
4682                                         ServerInstance->SNO->WriteToSnoMask('l',"AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
4683                                         this->ConnectServer(&(*x));
4684                                 }
4685                         }
4686                 }
4687         }
4688
4689         int HandleVersion(const char** parameters, int pcnt, userrec* user)
4690         {
4691                 // we've already checked if pcnt > 0, so this is safe
4692                 TreeServer* found = Utils->FindServerMask(parameters[0]);
4693                 if (found)
4694                 {
4695                         std::string Version = found->GetVersion();
4696                         user->WriteServ("351 %s :%s",user->nick,Version.c_str());
4697                         if (found == Utils->TreeRoot)
4698                         {
4699                                 ServerInstance->Config->Send005(user);
4700                         }
4701                 }
4702                 else
4703                 {
4704                         user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4705                 }
4706                 return 1;
4707         }
4708
4709         int HandleConnect(const char** parameters, int pcnt, userrec* user)
4710         {
4711                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
4712                 {
4713                         if (ServerInstance->MatchText(x->Name.c_str(),parameters[0]))
4714                         {
4715                                 TreeServer* CheckDupe = Utils->FindServer(x->Name.c_str());
4716                                 if (!CheckDupe)
4717                                 {
4718                                         user->WriteServ("NOTICE %s :*** CONNECT: Connecting to server: \002%s\002 (%s:%d)",user->nick,x->Name.c_str(),(x->HiddenFromStats ? "<hidden>" : x->IPAddr.c_str()),x->Port);
4719                                         ConnectServer(&(*x));
4720                                         return 1;
4721                                 }
4722                                 else
4723                                 {
4724                                         user->WriteServ("NOTICE %s :*** CONNECT: Server \002%s\002 already exists on the network and is connected via \002%s\002",user->nick,x->Name.c_str(),CheckDupe->GetParent()->GetName().c_str());
4725                                         return 1;
4726                                 }
4727                         }
4728                 }
4729                 user->WriteServ("NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
4730                 return 1;
4731         }
4732
4733         void BroadcastTimeSync()
4734         {
4735                 std::deque<std::string> params;
4736                 params.push_back(ConvToStr(ServerInstance->Time(true)));
4737                 Utils->DoOneToMany(Utils->TreeRoot->GetName(), "TIMESET", params);
4738         }
4739
4740         virtual int OnStats(char statschar, userrec* user, string_list &results)
4741         {
4742                 if ((statschar == 'c') || (statschar == 'n'))
4743                 {
4744                         for (unsigned int i = 0; i < Utils->LinkBlocks.size(); i++)
4745                         {
4746                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 213 "+user->nick+" "+statschar+" *@"+(Utils->LinkBlocks[i].HiddenFromStats ? "<hidden>" : Utils->LinkBlocks[i].IPAddr)+" * "+Utils->LinkBlocks[i].Name.c_str()+" "+ConvToStr(Utils->LinkBlocks[i].Port)+" "+(Utils->LinkBlocks[i].Hook.empty() ? "plaintext" : Utils->LinkBlocks[i].Hook)+" "+(Utils->LinkBlocks[i].AutoConnect ? 'a' : '-')+'s');
4747                                 if (statschar == 'c')
4748                                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 244 "+user->nick+" H * * "+Utils->LinkBlocks[i].Name.c_str());
4749                         }
4750                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 219 "+user->nick+" "+statschar+" :End of /STATS report");
4751                         ServerInstance->SNO->WriteToSnoMask('t',"Notice: %s '%c' requested by %s (%s@%s)",(!strcmp(user->server,ServerInstance->Config->ServerName) ? "Stats" : "Remote stats"),statschar,user->nick,user->ident,user->host);
4752                         return 1;
4753                 }
4754                 return 0;
4755         }
4756
4757         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
4758         {
4759                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
4760                 if (!validated)
4761                         return 0;
4762
4763                 if (command == "CONNECT")
4764                 {
4765                         return this->HandleConnect(parameters,pcnt,user);
4766                 }
4767                 else if (command == "STATS")
4768                 {
4769                         return this->HandleStats(parameters,pcnt,user);
4770                 }
4771                 else if (command == "MOTD")
4772                 {
4773                         return this->HandleMotd(parameters,pcnt,user);
4774                 }
4775                 else if (command == "ADMIN")
4776                 {
4777                         return this->HandleAdmin(parameters,pcnt,user);
4778                 }
4779                 else if (command == "SQUIT")
4780                 {
4781                         return this->HandleSquit(parameters,pcnt,user);
4782                 }
4783                 else if (command == "MAP")
4784                 {
4785                         this->HandleMap(parameters,pcnt,user);
4786                         return 1;
4787                 }
4788                 else if ((command == "TIME") && (pcnt > 0))
4789                 {
4790                         return this->HandleTime(parameters,pcnt,user);
4791                 }
4792                 else if (command == "LUSERS")
4793                 {
4794                         this->HandleLusers(parameters,pcnt,user);
4795                         return 1;
4796                 }
4797                 else if (command == "LINKS")
4798                 {
4799                         this->HandleLinks(parameters,pcnt,user);
4800                         return 1;
4801                 }
4802                 else if (command == "WHOIS")
4803                 {
4804                         if (pcnt > 1)
4805                         {
4806                                 // remote whois
4807                                 return this->HandleRemoteWhois(parameters,pcnt,user);
4808                         }
4809                 }
4810                 else if ((command == "VERSION") && (pcnt > 0))
4811                 {
4812                         this->HandleVersion(parameters,pcnt,user);
4813                         return 1;
4814                 }
4815
4816                 return 0;
4817         }
4818
4819         virtual void OnPostCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, CmdResult result, const std::string &original_line)
4820         {
4821                 if ((result == CMD_SUCCESS) && (ServerInstance->IsValidModuleCommand(command, pcnt, user)))
4822                 {
4823                         // this bit of code cleverly routes all module commands
4824                         // to all remote severs *automatically* so that modules
4825                         // can just handle commands locally, without having
4826                         // to have any special provision in place for remote
4827                         // commands and linking protocols.
4828                         std::deque<std::string> params;
4829                         params.clear();
4830                         for (int j = 0; j < pcnt; j++)
4831                         {
4832                                 if (strchr(parameters[j],' '))
4833                                 {
4834                                         params.push_back(":" + std::string(parameters[j]));
4835                                 }
4836                                 else
4837                                 {
4838                                         params.push_back(std::string(parameters[j]));
4839                                 }
4840                         }
4841                         ServerInstance->Log(DEBUG,"Globally route '%s'",command.c_str());
4842                         Utils->DoOneToMany(user->nick,command,params);
4843                 }
4844         }
4845
4846         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
4847         {
4848                 TreeServer* s = Utils->FindServer(servername);
4849                 if (s)
4850                 {
4851                         description = s->GetDesc();
4852                 }
4853         }
4854
4855         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
4856         {
4857                 if (IS_LOCAL(source))
4858                 {
4859                         std::deque<std::string> params;
4860                         params.push_back(dest->nick);
4861                         params.push_back(channel->name);
4862                         Utils->DoOneToMany(source->nick,"INVITE",params);
4863                 }
4864         }
4865
4866         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
4867         {
4868                 std::deque<std::string> params;
4869                 params.push_back(chan->name);
4870                 params.push_back(":"+topic);
4871                 Utils->DoOneToMany(user->nick,"TOPIC",params);
4872         }
4873
4874         virtual void OnWallops(userrec* user, const std::string &text)
4875         {
4876                 if (IS_LOCAL(user))
4877                 {
4878                         std::deque<std::string> params;
4879                         params.push_back(":"+text);
4880                         Utils->DoOneToMany(user->nick,"WALLOPS",params);
4881                 }
4882         }
4883
4884         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status, const CUList &exempt_list)
4885         {
4886                 if (target_type == TYPE_USER)
4887                 {
4888                         userrec* d = (userrec*)dest;
4889                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4890                         {
4891                                 std::deque<std::string> params;
4892                                 params.clear();
4893                                 params.push_back(d->nick);
4894                                 params.push_back(":"+text);
4895                                 Utils->DoOneToOne(user->nick,"NOTICE",params,d->server);
4896                         }
4897                 }
4898                 else if (target_type == TYPE_CHANNEL)
4899                 {
4900                         if (IS_LOCAL(user))
4901                         {
4902                                 chanrec *c = (chanrec*)dest;
4903                                 if (c)
4904                                 {
4905                                         std::string cname = c->name;
4906                                         if (status)
4907                                                 cname = status + cname;
4908                                         TreeServerList list;
4909                                         Utils->GetListOfServersForChannel(c,list,status,exempt_list);
4910
4911                                         for (TreeServerList::iterator i = list.begin(); i != list.end(); i++)
4912                                         {
4913                                                 TreeSocket* Sock = i->second->GetSocket();
4914                                                 if (Sock)
4915                                                         Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
4916                                         }
4917                                 }
4918                         }
4919                 }
4920                 else if (target_type == TYPE_SERVER)
4921                 {
4922                         if (IS_LOCAL(user))
4923                         {
4924                                 char* target = (char*)dest;
4925                                 std::deque<std::string> par;
4926                                 par.push_back(target);
4927                                 par.push_back(":"+text);
4928                                 Utils->DoOneToMany(user->nick,"NOTICE",par);
4929                         }
4930                 }
4931         }
4932
4933         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status, const CUList &exempt_list)
4934         {
4935                 if (target_type == TYPE_USER)
4936                 {
4937                         // route private messages which are targetted at clients only to the server
4938                         // which needs to receive them
4939                         userrec* d = (userrec*)dest;
4940                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4941                         {
4942                                 std::deque<std::string> params;
4943                                 params.clear();
4944                                 params.push_back(d->nick);
4945                                 params.push_back(":"+text);
4946                                 Utils->DoOneToOne(user->nick,"PRIVMSG",params,d->server);
4947                         }
4948                 }
4949                 else if (target_type == TYPE_CHANNEL)
4950                 {
4951                         if (IS_LOCAL(user))
4952                         {
4953                                 chanrec *c = (chanrec*)dest;
4954                                 if (c)
4955                                 {
4956                                         std::string cname = c->name;
4957                                         if (status)
4958                                                 cname = status + cname;
4959                                         TreeServerList list;
4960                                         Utils->GetListOfServersForChannel(c,list,status,exempt_list);
4961
4962                                         for (TreeServerList::iterator i = list.begin(); i != list.end(); i++)
4963                                         {
4964                                                 TreeSocket* Sock = i->second->GetSocket();
4965                                                 if (Sock)
4966                                                         Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
4967                                         }
4968                                 }
4969                         }
4970                 }
4971                 else if (target_type == TYPE_SERVER)
4972                 {
4973                         if (IS_LOCAL(user))
4974                         {
4975                                 char* target = (char*)dest;
4976                                 std::deque<std::string> par;
4977                                 par.push_back(target);
4978                                 par.push_back(":"+text);
4979                                 Utils->DoOneToMany(user->nick,"PRIVMSG",par);
4980                         }
4981                 }
4982         }
4983
4984         virtual void OnBackgroundTimer(time_t curtime)
4985         {
4986                 AutoConnectServers(curtime);
4987                 DoPingChecks(curtime);
4988         }
4989
4990         virtual void OnUserJoin(userrec* user, chanrec* channel)
4991         {
4992                 // Only do this for local users
4993                 if (IS_LOCAL(user))
4994                 {
4995                         if (channel->GetUserCounter() == 1)
4996                         {
4997                                 std::deque<std::string> params;
4998                                 // set up their permissions and the channel TS with FJOIN.
4999                                 // All users are FJOINed now, because a module may specify
5000                                 // new joining permissions for the user.
5001                                 params.push_back(channel->name);
5002                                 params.push_back(ConvToStr(channel->age));
5003                                 params.push_back(std::string(channel->GetAllPrefixChars(user))+","+std::string(user->nick));
5004                                 Utils->DoOneToMany(ServerInstance->Config->ServerName,"FJOIN",params);
5005                                 /* First user in, sync the modes for the channel */
5006                                 params.pop_back();
5007                                 /* This is safe, all inspircd servers default to +nt */
5008                                 params.push_back("+nt");
5009                                 Utils->DoOneToMany(ServerInstance->Config->ServerName,"FMODE",params);
5010                         }
5011                         else
5012                         {
5013                                 std::deque<std::string> params;
5014                                 params.push_back(channel->name);
5015                                 params.push_back(ConvToStr(channel->age));
5016                                 Utils->DoOneToMany(user->nick,"JOIN",params);
5017                         }
5018                 }
5019         }
5020
5021         virtual void OnChangeHost(userrec* user, const std::string &newhost)
5022         {
5023                 // only occurs for local clients
5024                 if (user->registered != REG_ALL)
5025                         return;
5026                 std::deque<std::string> params;
5027                 params.push_back(newhost);
5028                 Utils->DoOneToMany(user->nick,"FHOST",params);
5029         }
5030
5031         virtual void OnChangeName(userrec* user, const std::string &gecos)
5032         {
5033                 // only occurs for local clients
5034                 if (user->registered != REG_ALL)
5035                         return;
5036                 std::deque<std::string> params;
5037                 params.push_back(gecos);
5038                 Utils->DoOneToMany(user->nick,"FNAME",params);
5039         }
5040
5041         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
5042         {
5043                 if (IS_LOCAL(user))
5044                 {
5045                         std::deque<std::string> params;
5046                         params.push_back(channel->name);
5047                         if (partmessage != "")
5048                                 params.push_back(":"+partmessage);
5049                         Utils->DoOneToMany(user->nick,"PART",params);
5050                 }
5051         }
5052
5053         virtual void OnUserConnect(userrec* user)
5054         {
5055                 char agestr[MAXBUF];
5056                 if (IS_LOCAL(user))
5057                 {
5058                         std::deque<std::string> params;
5059                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
5060                         params.push_back(agestr);
5061                         params.push_back(user->nick);
5062                         params.push_back(user->host);
5063                         params.push_back(user->dhost);
5064                         params.push_back(user->ident);
5065                         params.push_back("+"+std::string(user->FormatModes()));
5066                         params.push_back(user->GetIPString());
5067                         params.push_back(":"+std::string(user->fullname));
5068                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"NICK",params);
5069
5070                         // User is Local, change needs to be reflected!
5071                         TreeServer* SourceServer = Utils->FindServer(user->server);
5072                         if (SourceServer)
5073                         {
5074                                 SourceServer->AddUserCount();
5075                         }
5076
5077                 }
5078         }
5079
5080         virtual void OnUserQuit(userrec* user, const std::string &reason)
5081         {
5082                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
5083                 {
5084                         std::deque<std::string> params;
5085                         params.push_back(":"+reason);
5086                         Utils->DoOneToMany(user->nick,"QUIT",params);
5087                 }
5088                 // Regardless, We need to modify the user Counts..
5089                 TreeServer* SourceServer = Utils->FindServer(user->server);
5090                 if (SourceServer)
5091                 {
5092                         SourceServer->DelUserCount();
5093                 }
5094
5095         }
5096
5097         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
5098         {
5099                 if (IS_LOCAL(user))
5100                 {
5101                         std::deque<std::string> params;
5102                         params.push_back(user->nick);
5103                         Utils->DoOneToMany(oldnick,"NICK",params);
5104                 }
5105         }
5106
5107         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
5108         {
5109                 if ((source) && (IS_LOCAL(source)))
5110                 {
5111                         std::deque<std::string> params;
5112                         params.push_back(chan->name);
5113                         params.push_back(user->nick);
5114                         params.push_back(":"+reason);
5115                         Utils->DoOneToMany(source->nick,"KICK",params);
5116                 }
5117                 else if (!source)
5118                 {
5119                         std::deque<std::string> params;
5120                         params.push_back(chan->name);
5121                         params.push_back(user->nick);
5122                         params.push_back(":"+reason);
5123                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"KICK",params);
5124                 }
5125         }
5126
5127         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
5128         {
5129                 std::deque<std::string> params;
5130                 params.push_back(dest->nick);
5131                 params.push_back(":"+reason);
5132                 Utils->DoOneToMany(source->nick,"KILL",params);
5133         }
5134
5135         virtual void OnRehash(const std::string &parameter)
5136         {
5137                 if (parameter != "")
5138                 {
5139                         std::deque<std::string> params;
5140                         params.push_back(parameter);
5141                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"REHASH",params);
5142                         // check for self
5143                         if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameter))
5144                         {
5145                                 ServerInstance->WriteOpers("*** Remote rehash initiated from server \002%s\002",ServerInstance->Config->ServerName);
5146                                 ServerInstance->RehashServer();
5147                         }
5148                 }
5149                 Utils->ReadConfiguration(false);
5150         }
5151
5152         // note: the protocol does not allow direct umode +o except
5153         // via NICK with 8 params. sending OPERTYPE infers +o modechange
5154         // locally.
5155         virtual void OnOper(userrec* user, const std::string &opertype)
5156         {
5157                 if (IS_LOCAL(user))
5158                 {
5159                         std::deque<std::string> params;
5160                         params.push_back(opertype);
5161                         Utils->DoOneToMany(user->nick,"OPERTYPE",params);
5162                 }
5163         }
5164
5165         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
5166         {
5167                 if (!source)
5168                 {
5169                         /* Server-set lines */
5170                         char data[MAXBUF];
5171                         snprintf(data,MAXBUF,"%c %s %s %lu %lu :%s", linetype, host.c_str(), ServerInstance->Config->ServerName, (unsigned long)ServerInstance->Time(false),
5172                                         (unsigned long)duration, reason.c_str());
5173                         std::deque<std::string> params;
5174                         params.push_back(data);
5175                         Utils->DoOneToMany(ServerInstance->Config->ServerName, "ADDLINE", params);
5176                 }
5177                 else
5178                 {
5179                         if (IS_LOCAL(source))
5180                         {
5181                                 char type[8];
5182                                 snprintf(type,8,"%cLINE",linetype);
5183                                 std::string stype = type;
5184                                 if (adding)
5185                                 {
5186                                         char sduration[MAXBUF];
5187                                         snprintf(sduration,MAXBUF,"%ld",duration);
5188                                         std::deque<std::string> params;
5189                                         params.push_back(host);
5190                                         params.push_back(sduration);
5191                                         params.push_back(":"+reason);
5192                                         Utils->DoOneToMany(source->nick,stype,params);
5193                                 }
5194                                 else
5195                                 {
5196                                         std::deque<std::string> params;
5197                                         params.push_back(host);
5198                                         Utils->DoOneToMany(source->nick,stype,params);
5199                                 }
5200                         }
5201                 }
5202         }
5203
5204         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
5205         {
5206                 OnLine(source,hostmask,true,'G',duration,reason);
5207         }
5208
5209         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
5210         {
5211                 OnLine(source,ipmask,true,'Z',duration,reason);
5212         }
5213
5214         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
5215         {
5216                 OnLine(source,nickmask,true,'Q',duration,reason);
5217         }
5218
5219         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
5220         {
5221                 OnLine(source,hostmask,true,'E',duration,reason);
5222         }
5223
5224         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
5225         {
5226                 OnLine(source,hostmask,false,'G',0,"");
5227         }
5228
5229         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
5230         {
5231                 OnLine(source,ipmask,false,'Z',0,"");
5232         }
5233
5234         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
5235         {
5236                 OnLine(source,nickmask,false,'Q',0,"");
5237         }
5238
5239         virtual void OnDelELine(userrec* source, const std::string &hostmask)
5240         {
5241                 OnLine(source,hostmask,false,'E',0,"");
5242         }
5243
5244         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
5245         {
5246                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
5247                 {
5248                         if (target_type == TYPE_USER)
5249                         {
5250                                 userrec* u = (userrec*)dest;
5251                                 std::deque<std::string> params;
5252                                 params.push_back(u->nick);
5253                                 params.push_back(text);
5254                                 Utils->DoOneToMany(user->nick,"MODE",params);
5255                         }
5256                         else
5257                         {
5258                                 chanrec* c = (chanrec*)dest;
5259                                 std::deque<std::string> params;
5260                                 params.push_back(c->name);
5261                                 params.push_back(text);
5262                                 Utils->DoOneToMany(user->nick,"MODE",params);
5263                         }
5264                 }
5265         }
5266
5267         virtual void OnSetAway(userrec* user)
5268         {
5269                 if (IS_LOCAL(user))
5270                 {
5271                         std::deque<std::string> params;
5272                         params.push_back(":"+std::string(user->awaymsg));
5273                         Utils->DoOneToMany(user->nick,"AWAY",params);
5274                 }
5275         }
5276
5277         virtual void OnCancelAway(userrec* user)
5278         {
5279                 if (IS_LOCAL(user))
5280                 {
5281                         std::deque<std::string> params;
5282                         params.clear();
5283                         Utils->DoOneToMany(user->nick,"AWAY",params);
5284                 }
5285         }
5286
5287         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
5288         {
5289                 TreeSocket* s = (TreeSocket*)opaque;
5290                 if (target)
5291                 {
5292                         if (target_type == TYPE_USER)
5293                         {
5294                                 userrec* u = (userrec*)target;
5295                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
5296                         }
5297                         else
5298                         {
5299                                 chanrec* c = (chanrec*)target;
5300                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
5301                         }
5302                 }
5303         }
5304
5305         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
5306         {
5307                 TreeSocket* s = (TreeSocket*)opaque;
5308                 if (target)
5309                 {
5310                         if (target_type == TYPE_USER)
5311                         {
5312                                 userrec* u = (userrec*)target;
5313                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+u->nick+" "+extname+" :"+extdata);
5314                         }
5315                         else if (target_type == TYPE_CHANNEL)
5316                         {
5317                                 chanrec* c = (chanrec*)target;
5318                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+c->name+" "+extname+" :"+extdata);
5319                         }
5320                 }
5321                 if (target_type == TYPE_OTHER)
5322                 {
5323                         s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA * "+extname+" :"+extdata);
5324                 }
5325         }
5326
5327         virtual void OnEvent(Event* event)
5328         {
5329                 std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
5330
5331                 if (event->GetEventID() == "send_metadata")
5332                 {
5333                         if (params->size() < 3)
5334                                 return;
5335                         (*params)[2] = ":" + (*params)[2];
5336                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"METADATA",*params);
5337                 }
5338                 else if (event->GetEventID() == "send_topic")
5339                 {
5340                         if (params->size() < 2)
5341                                 return;
5342                         (*params)[1] = ":" + (*params)[1];
5343                         params->insert(params->begin() + 1,ServerInstance->Config->ServerName);
5344                         params->insert(params->begin() + 1,ConvToStr(ServerInstance->Time(true)));
5345                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FTOPIC",*params);
5346                 }
5347                 else if (event->GetEventID() == "send_mode")
5348                 {
5349                         if (params->size() < 2)
5350                                 return;
5351                         // Insert the TS value of the object, either userrec or chanrec
5352                         time_t ourTS = 0;
5353                         userrec* a = ServerInstance->FindNick((*params)[0]);
5354                         if (a)
5355                         {
5356                                 ourTS = a->age;
5357                         }
5358                         else
5359                         {
5360                                 chanrec* a = ServerInstance->FindChan((*params)[0]);
5361                                 if (a)
5362                                 {
5363                                         ourTS = a->age;
5364                                 }
5365                         }
5366                         params->insert(params->begin() + 1,ConvToStr(ourTS));
5367                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FMODE",*params);
5368                 }
5369                 else if (event->GetEventID() == "send_mode_explicit")
5370                 {
5371                         if (params->size() < 2)
5372                                 return;
5373                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"MODE",*params);
5374                 }
5375                 else if (event->GetEventID() == "send_opers")
5376                 {
5377                         if (params->size() < 1)
5378                                 return;
5379                         (*params)[0] = ":" + (*params)[0];
5380                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"OPERNOTICE",*params);
5381                 }
5382                 else if (event->GetEventID() == "send_modeset")
5383                 {
5384                         if (params->size() < 2)
5385                                 return;
5386                         (*params)[1] = ":" + (*params)[1];
5387                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"MODENOTICE",*params);
5388                 }
5389                 else if (event->GetEventID() == "send_snoset")
5390                 {
5391                         if (params->size() < 2)
5392                                 return;
5393                         (*params)[1] = ":" + (*params)[1];
5394                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"SNONOTICE",*params);
5395                 }
5396                 else if (event->GetEventID() == "send_push")
5397                 {
5398                         if (params->size() < 2)
5399                                 return;
5400
5401                         userrec *a = ServerInstance->FindNick((*params)[0]);
5402
5403                         if (!a)
5404                                 return;
5405
5406                         (*params)[1] = ":" + (*params)[1];
5407                         Utils->DoOneToOne(ServerInstance->Config->ServerName, "PUSH", *params, a->server);
5408                 }
5409         }
5410
5411         virtual ~ModuleSpanningTree()
5412         {
5413                 ServerInstance->Log(DEBUG,"Performing unload of spanningtree!");
5414                 /* This will also free the listeners */
5415                 delete Utils;
5416                 if (SyncTimer)
5417                         ServerInstance->Timers->DelTimer(SyncTimer);
5418
5419                 ServerInstance->DoneWithInterface("InspSocketHook");
5420         }
5421
5422         virtual Version GetVersion()
5423         {
5424                 return Version(1,1,0,2,VF_VENDOR,API_VERSION);
5425         }
5426
5427         void Implements(char* List)
5428         {
5429                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
5430                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
5431                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
5432                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
5433                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
5434                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
5435                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = List[I_OnPostCommand] = 1;
5436         }
5437
5438         /* It is IMPORTANT that m_spanningtree is the last module in the chain
5439          * so that any activity it sees is FINAL, e.g. we arent going to send out
5440          * a NICK message before m_cloaking has finished putting the +x on the user,
5441          * etc etc.
5442          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
5443          * the module call queue.
5444          */
5445         Priority Prioritize()
5446         {
5447                 return PRIORITY_LAST;
5448         }
5449 };
5450
5451 TimeSyncTimer::TimeSyncTimer(InspIRCd *Inst, ModuleSpanningTree *Mod) : InspTimer(43200, Inst->Time()), Instance(Inst), Module(Mod)
5452 {
5453 }
5454
5455 void TimeSyncTimer::Tick(time_t TIME)
5456 {
5457         Module->BroadcastTimeSync();
5458         Module->SyncTimer = new TimeSyncTimer(Instance, Module);
5459         Instance->Timers->AddTimer(Module->SyncTimer);
5460 }
5461
5462 void SpanningTreeUtilities::DoFailOver(Link* x)
5463 {
5464         if (x->FailOver.length())
5465         {
5466                 if (x->FailOver == x->Name)
5467                 {
5468                         ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Some muppet configured the failover for server \002%s\002 to point at itself. Not following it!", x->Name.c_str());
5469                         return;
5470                 }
5471                 Link* TryThisOne = this->FindLink(x->FailOver.c_str());
5472                 if (TryThisOne)
5473                 {
5474                         ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Trying failover link for \002%s\002: \002%s\002...", x->Name.c_str(), TryThisOne->Name.c_str());
5475                         Creator->ConnectServer(TryThisOne);
5476                 }
5477                 else
5478                 {
5479                         ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Invalid failover server specified for server \002%s\002, will not follow!", x->Name.c_str());
5480                 }
5481         }
5482 }
5483
5484 Link* SpanningTreeUtilities::FindLink(const std::string& name)
5485 {
5486         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
5487         {
5488                 if (ServerInstance->MatchText(x->Name.c_str(), name.c_str()))
5489                 {
5490                         return &(*x);
5491                 }
5492         }
5493         return NULL;
5494 }
5495
5496 class ModuleSpanningTreeFactory : public ModuleFactory
5497 {
5498  public:
5499         ModuleSpanningTreeFactory()
5500         {
5501         }
5502
5503         ~ModuleSpanningTreeFactory()
5504         {
5505         }
5506
5507         virtual Module * CreateModule(InspIRCd* Me)
5508         {
5509                 return new ModuleSpanningTree(Me);
5510         }
5511
5512 };
5513
5514
5515 extern "C" void * init_module( void )
5516 {
5517         return new ModuleSpanningTreeFactory;
5518 }