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