src/modules/m_spanningtree.cpp

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