src/modules/m_spanningtree.cpp

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