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                 this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString());
1898
1899                 params[7] = ":" + params[7];
1900                 Utils->DoOneToAllButSender(source,"NICK",params,source);
1901
1902                 // Increment the Source Servers User Count..
1903                 TreeServer* SourceServer = Utils->FindServer(source);
1904                 if (SourceServer)
1905                 {
1906                         Instance->Log(DEBUG,"Found source server of %s",_new->nick);
1907                         SourceServer->AddUserCount();
1908                 }
1909
1910                 FOREACH_MOD_I(Instance,I_OnPostConnect,OnPostConnect(_new));
1911
1912                 return true;
1913         }
1914
1915         /** Send one or more FJOINs for a channel of users.
1916          * If the length of a single line is more than 480-NICKMAX
1917          * in length, it is split over multiple lines.
1918          */
1919         void SendFJoins(TreeServer* Current, chanrec* c)
1920         {
1921                 std::string buffer;
1922
1923                 Instance->Log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1924                 char list[MAXBUF];
1925                 std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
1926
1927                 size_t dlen, curlen;
1928                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1929                 int numusers = 0;
1930                 char* ptr = list + dlen;
1931
1932                 CUList *ulist = c->GetUsers();
1933                 std::string modes = "";
1934                 std::string params = "";
1935
1936                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1937                 {
1938                         // The first parameter gets a : before it
1939                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick);
1940
1941                         curlen += ptrlen;
1942                         ptr += ptrlen;
1943
1944                         numusers++;
1945
1946                         if (curlen > (480-NICKMAX))
1947                         {
1948                                 buffer.append(list).append("\r\n");
1949
1950                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1951                                 ptr = list + dlen;
1952                                 ptrlen = 0;
1953                                 numusers = 0;
1954                         }
1955                 }
1956
1957                 if (numusers)
1958                         buffer.append(list).append("\r\n");
1959
1960                 /* Sorry for the hax. Because newly created channels assume +nt,
1961                  * if this channel doesnt have +nt, explicitly send -n and -t for the missing modes.
1962                  */
1963                 bool inverted = false;
1964                 if (!c->IsModeSet('n'))
1965                 {
1966                         modes.append("-n");
1967                         inverted = true;
1968                 }
1969                 if (!c->IsModeSet('t'))
1970                 {
1971                         modes.append("-t");
1972                         inverted = true;
1973                 }
1974                 if (inverted)
1975                 {
1976                         modes.append("+");
1977                 }
1978
1979                 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1980                 {
1981                         modes.append("b");
1982                         params.append(" ").append(b->data);
1983
1984                         if (params.length() >= MAXMODES)
1985                         {
1986                                 /* Wrap at MAXMODES */
1987                                 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");
1988                                 modes = "";
1989                                 params = "";
1990                         }
1991                 }
1992
1993                 buffer.append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(c->ChanModes(true));
1994
1995                 /* Only send these if there are any */
1996                 if (!modes.empty())
1997                         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);
1998
1999                 this->WriteLine(buffer);
2000         }
2001
2002         /** Send G, Q, Z and E lines */
2003         void SendXLines(TreeServer* Current)
2004         {
2005                 char data[MAXBUF];
2006                 std::string buffer;
2007                 std::string n = this->Instance->Config->ServerName;
2008                 const char* sn = n.c_str();
2009                 int iterations = 0;
2010                 /* Yes, these arent too nice looking, but they get the job done */
2011                 for (std::vector<ZLine*>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++, iterations++)
2012                 {
2013                         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);
2014                         buffer.append(data);
2015                 }
2016                 for (std::vector<QLine*>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++, iterations++)
2017                 {
2018                         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);
2019                         buffer.append(data);
2020                 }
2021                 for (std::vector<GLine*>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++, iterations++)
2022                 {
2023                         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);
2024                         buffer.append(data);
2025                 }
2026                 for (std::vector<ELine*>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++, iterations++)
2027                 {
2028                         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);
2029                         buffer.append(data);
2030                 }
2031                 for (std::vector<ZLine*>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++, iterations++)
2032                 {
2033                         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);
2034                         buffer.append(data);
2035                 }
2036                 for (std::vector<QLine*>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++, iterations++)
2037                 {
2038                         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);
2039                         buffer.append(data);
2040                 }
2041                 for (std::vector<GLine*>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++, iterations++)
2042                 {
2043                         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);
2044                         buffer.append(data);
2045                 }
2046                 for (std::vector<ELine*>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++, iterations++)
2047                 {
2048                         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);
2049                         buffer.append(data);
2050                 }
2051
2052                 if (!buffer.empty())
2053                         this->WriteLine(buffer);
2054         }
2055
2056         /** Send channel modes and topics */
2057         void SendChannelModes(TreeServer* Current)
2058         {
2059                 char data[MAXBUF];
2060                 std::deque<std::string> list;
2061                 int iterations = 0;
2062                 std::string n = this->Instance->Config->ServerName;
2063                 const char* sn = n.c_str();
2064                 for (chan_hash::iterator c = this->Instance->chanlist.begin(); c != this->Instance->chanlist.end(); c++, iterations++)
2065                 {
2066                         SendFJoins(Current, c->second);
2067                         if (*c->second->topic)
2068                         {
2069                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
2070                                 this->WriteLine(data);
2071                         }
2072                         FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)Utils->Creator,(void*)this));
2073                         list.clear();
2074                         c->second->GetExtList(list);
2075                         for (unsigned int j = 0; j < list.size(); j++)
2076                         {
2077                                 FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)Utils->Creator,(void*)this,list[j]));
2078                         }
2079                 }
2080         }
2081
2082         /** send all users and their oper state/modes */
2083         void SendUsers(TreeServer* Current)
2084         {
2085                 char data[MAXBUF];
2086                 std::deque<std::string> list;
2087                 std::string dataline;
2088                 int iterations = 0;
2089                 for (user_hash::iterator u = this->Instance->clientlist.begin(); u != this->Instance->clientlist.end(); u++, iterations++)
2090                 {
2091                         if (u->second->registered == REG_ALL)
2092                         {
2093                                 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);
2094                                 this->WriteLine(data);
2095                                 if (*u->second->oper)
2096                                 {
2097                                         snprintf(data,MAXBUF,":%s OPERTYPE %s", u->second->nick, u->second->oper);
2098                                         this->WriteLine(data);
2099                                 }
2100                                 if (*u->second->awaymsg)
2101                                 {
2102                                         snprintf(data,MAXBUF,":%s AWAY :%s", u->second->nick, u->second->awaymsg);
2103                                         this->WriteLine(data);
2104                                 }
2105                                 FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)Utils->Creator,(void*)this));
2106                                 list.clear();
2107                                 u->second->GetExtList(list);
2108                                 for (unsigned int j = 0; j < list.size(); j++)
2109                                 {
2110                                         FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)Utils->Creator,(void*)this,list[j]));
2111                                 }
2112                         }
2113                 }
2114         }
2115
2116         /** This function is called when we want to send a netburst to a local
2117          * server. There is a set order we must do this, because for example
2118          * users require their servers to exist, and channels require their
2119          * users to exist. You get the idea.
2120          */
2121         void DoBurst(TreeServer* s)
2122         {
2123                 std::string burst = "BURST "+ConvToStr(Instance->Time(true));
2124                 std::string endburst = "ENDBURST";
2125                 // Because by the end of the netburst, it  could be gone!
2126                 std::string name = s->GetName();
2127                 this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2"+name+"\2.");
2128                 this->WriteLine(burst);
2129                 /* send our version string */
2130                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
2131                 /* Send server tree */
2132                 this->SendServers(Utils->TreeRoot,s,1);
2133                 /* Send users and their oper status */
2134                 this->SendUsers(s);
2135                 /* Send everything else (channel modes, xlines etc) */
2136                 this->SendChannelModes(s);
2137                 this->SendXLines(s);
2138                 FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)Utils->Creator,(void*)this));
2139                 this->WriteLine(endburst);
2140                 this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
2141         }
2142
2143         /** This function is called when we receive data from a remote
2144          * server. We buffer the data in a std::string (it doesnt stay
2145          * there for long), reading using InspSocket::Read() which can
2146          * read up to 16 kilobytes in one operation.
2147          *
2148          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
2149          * THE SOCKET OBJECT FOR US.
2150          */
2151         virtual bool OnDataReady()
2152         {
2153                 char* data = this->Read();
2154                 /* Check that the data read is a valid pointer and it has some content */
2155                 if (data && *data)
2156                 {
2157                         this->in_buffer.append(data);
2158                         /* While there is at least one new line in the buffer,
2159                          * do something useful (we hope!) with it.
2160                          */
2161                         while (in_buffer.find("\n") != std::string::npos)
2162                         {
2163                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
2164                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
2165                                 /* Use rfind here not find, as theres more
2166                                  * chance of the \r being near the end of the
2167                                  * string, not the start.
2168                                  */
2169                                 if (ret.find("\r") != std::string::npos)
2170                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
2171                                 /* Process this one, abort if it
2172                                  * didnt return true.
2173                                  */
2174                                 if (!this->ProcessLine(ret))
2175                                 {
2176                                         return false;
2177                                 }
2178                         }
2179                         return true;
2180                 }
2181                 /* EAGAIN returns an empty but non-NULL string, so this
2182                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
2183                  */
2184                 return (data && !*data);
2185         }
2186
2187         int WriteLine(std::string line)
2188         {
2189                 Instance->Log(DEBUG,"OUT: %s",line.c_str());
2190                 line.append("\r\n");
2191                 return this->Write(line);
2192         }
2193
2194         /* Handle ERROR command */
2195         bool Error(std::deque<std::string> &params)
2196         {
2197                 if (params.size() < 1)
2198                         return false;
2199                 this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
2200                 /* we will return false to cause the socket to close. */
2201                 return false;
2202         }
2203
2204         /** remote MOTD. leet, huh? */
2205         bool Motd(const std::string &prefix, std::deque<std::string> &params)
2206         {
2207                 if (params.size() > 0)
2208                 {
2209                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2210                         {
2211                                 /* It's for our server */
2212                                 string_list results;
2213                                 userrec* source = this->Instance->FindNick(prefix);
2214
2215                                 if (source)
2216                                 {
2217                                         std::deque<std::string> par;
2218                                         par.push_back(prefix);
2219                                         par.push_back("");
2220
2221                                         if (!Instance->Config->MOTD.size())
2222                                         {
2223                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
2224                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2225                                                 return true;
2226                                         }
2227
2228                                         par[1] = std::string("::")+Instance->Config->ServerName+" 375 "+source->nick+" :"+Instance->Config->ServerName+" message of the day";
2229                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2230
2231                                         for (unsigned int i = 0; i < Instance->Config->MOTD.size(); i++)
2232                                         {
2233                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 372 "+source->nick+" :- "+Instance->Config->MOTD[i];
2234                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2235                                         }
2236
2237                                         par[1] = std::string("::")+Instance->Config->ServerName+" 376 "+source->nick+" End of message of the day.";
2238                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2239                                 }
2240                         }
2241                         else
2242                         {
2243                                 /* Pass it on */
2244                                 userrec* source = this->Instance->FindNick(prefix);
2245                                 if (source)
2246                                         Utils->DoOneToOne(prefix, "MOTD", params, params[0]);
2247                         }
2248                 }
2249                 return true;
2250         }
2251
2252         /** remote ADMIN. leet, huh? */
2253         bool Admin(const std::string &prefix, std::deque<std::string> &params)
2254         {
2255                 if (params.size() > 0)
2256                 {
2257                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2258                         {
2259                                 /* It's for our server */
2260                                 string_list results;
2261                                 userrec* source = this->Instance->FindNick(prefix);
2262
2263                                 if (source)
2264                                 {
2265                                         std::deque<std::string> par;
2266                                         par.push_back(prefix);
2267                                         par.push_back("");
2268
2269                                         par[1] = std::string("::")+Instance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+Instance->Config->ServerName;
2270                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2271
2272                                         par[1] = std::string("::")+Instance->Config->ServerName+" 257 "+source->nick+" :Name     - "+Instance->Config->AdminName;
2273                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2274
2275                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+Instance->Config->AdminNick;
2276                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2277
2278                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+Instance->Config->AdminEmail;
2279                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2280                                 }
2281                         }
2282                         else
2283                         {
2284                                 /* Pass it on */
2285                                 userrec* source = this->Instance->FindNick(prefix);
2286                                 if (source)
2287                                         Utils->DoOneToOne(prefix, "ADMIN", params, params[0]);
2288                         }
2289                 }
2290                 return true;
2291         }
2292
2293         bool Stats(const std::string &prefix, std::deque<std::string> &params)
2294         {
2295                 /* Get the reply to a STATS query if it matches this servername,
2296                  * and send it back as a load of PUSH queries
2297                  */
2298                 if (params.size() > 1)
2299                 {
2300                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
2301                         {
2302                                 /* It's for our server */
2303                                 string_list results;
2304                                 userrec* source = this->Instance->FindNick(prefix);
2305                                 if (source)
2306                                 {
2307                                         std::deque<std::string> par;
2308                                         par.push_back(prefix);
2309                                         par.push_back("");
2310                                         DoStats(this->Instance, *(params[0].c_str()), source, results);
2311                                         for (size_t i = 0; i < results.size(); i++)
2312                                         {
2313                                                 par[1] = "::" + results[i];
2314                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2315                                         }
2316                                 }
2317                         }
2318                         else
2319                         {
2320                                 /* Pass it on */
2321                                 userrec* source = this->Instance->FindNick(prefix);
2322                                 if (source)
2323                                         Utils->DoOneToOne(prefix, "STATS", params, params[1]);
2324                         }
2325                 }
2326                 return true;
2327         }
2328
2329
2330         /** Because the core won't let users or even SERVERS set +o,
2331          * we use the OPERTYPE command to do this.
2332          */
2333         bool OperType(const std::string &prefix, std::deque<std::string> &params)
2334         {
2335                 if (params.size() != 1)
2336                 {
2337                         Instance->Log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
2338                         return true;
2339                 }
2340                 std::string opertype = params[0];
2341                 userrec* u = this->Instance->FindNick(prefix);
2342                 if (u)
2343                 {
2344                         u->modes[UM_OPERATOR] = 1;
2345                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
2346                         Utils->DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
2347                 }
2348                 return true;
2349         }
2350
2351         /** Because Andy insists that services-compatible servers must
2352          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
2353          */
2354         bool ForceNick(const std::string &prefix, std::deque<std::string> &params)
2355         {
2356                 if (params.size() < 3)
2357                         return true;
2358
2359                 userrec* u = this->Instance->FindNick(params[0]);
2360
2361                 if (u)
2362                 {
2363                         Utils->DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
2364                         if (IS_LOCAL(u))
2365                         {
2366                                 std::deque<std::string> par;
2367                                 par.push_back(params[1]);
2368                                 /* This is not required as one is sent in OnUserPostNick below
2369                                  */
2370                                 //Utils->DoOneToMany(u->nick,"NICK",par);
2371                                 if (!u->ForceNickChange(params[1].c_str()))
2372                                 {
2373                                         userrec::QuitUser(this->Instance, u, "Nickname collision");
2374                                         return true;
2375                                 }
2376                                 u->age = atoi(params[2].c_str());
2377                         }
2378                 }
2379                 return true;
2380         }
2381
2382         /*
2383          * Remote SQUIT (RSQUIT). Routing works similar to SVSNICK: Route it to the server that the target is connected to locally,
2384          * then let that server do the dirty work (squit it!). Example:
2385          * 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
2386          */
2387         bool RemoteSquit(const std::string &prefix, std::deque<std::string> &params)
2388         {
2389                 /* ok.. :w00t RSQUIT jupe.barafranca.com :reason here */
2390                 if (params.size() < 2)
2391                         return true;
2392
2393                 TreeServer* s = Utils->FindServerMask(params[0]);
2394
2395                 if (s)
2396                 {
2397                         if (s == Utils->TreeRoot)
2398                         {
2399                                 this->Instance->SNO->WriteToSnoMask('l',"What the fuck, I recieved a remote SQUIT for myself? :< (from %s", prefix.c_str());
2400                                 return true;
2401                         }
2402
2403                         TreeSocket* sock = s->GetSocket();
2404
2405                         if (sock)
2406                         {
2407                                 /* it's locally connected, KILL IT! */
2408                                 Instance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
2409                                 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());
2410                                 sock->Squit(s,"Server quit by " + prefix + ": " + params[1]);
2411                                 Instance->SE->DelFd(sock);
2412                                 sock->Close();
2413                                 delete sock;
2414                         }
2415                         else
2416                         {
2417                                 /* route the rsquit */
2418                                 params[1] = ":" + params[1];
2419                                 Utils->DoOneToOne(prefix, "RSQUIT", params, params[0]);
2420                         }
2421                 }
2422                 else
2423                 {
2424                         /* mother fucker! it doesn't exist */
2425                 }
2426
2427                 return true;
2428         }
2429
2430         bool ServiceJoin(const std::string &prefix, std::deque<std::string> &params)
2431         {
2432                 if (params.size() < 2)
2433                         return true;
2434
2435                 userrec* u = this->Instance->FindNick(params[0]);
2436
2437                 if (u)
2438                 {
2439                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false);
2440                         Utils->DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
2441                 }
2442                 return true;
2443         }
2444
2445         bool RemoteRehash(const std::string &prefix, std::deque<std::string> &params)
2446         {
2447                 if (params.size() < 1)
2448                         return false;
2449
2450                 std::string servermask = params[0];
2451
2452                 if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
2453                 {
2454                         this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated from server \002"+prefix+"\002.");
2455                         this->Instance->RehashServer();
2456                         Utils->ReadConfiguration(false);
2457                         InitializeDisabledCommands(Instance->Config->DisabledCommands, Instance);
2458                 }
2459                 Utils->DoOneToAllButSender(prefix,"REHASH",params,prefix);
2460                 return true;
2461         }
2462
2463         bool RemoteKill(const std::string &prefix, std::deque<std::string> &params)
2464         {
2465                 if (params.size() != 2)
2466                         return true;
2467
2468                 std::string nick = params[0];
2469                 userrec* u = this->Instance->FindNick(prefix);
2470                 userrec* who = this->Instance->FindNick(nick);
2471
2472                 if (who)
2473                 {
2474                         /* Prepend kill source, if we don't have one */
2475                         std::string sourceserv = prefix;
2476                         if (u)
2477                         {
2478                                 sourceserv = u->server;
2479                         }
2480                         if (*(params[1].c_str()) != '[')
2481                         {
2482                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
2483                         }
2484                         std::string reason = params[1];
2485                         params[1] = ":" + params[1];
2486                         Utils->DoOneToAllButSender(prefix,"KILL",params,sourceserv);
2487                         who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
2488                         userrec::QuitUser(this->Instance,who,reason);
2489                 }
2490                 return true;
2491         }
2492
2493         bool LocalPong(const std::string &prefix, std::deque<std::string> &params)
2494         {
2495                 if (params.size() < 1)
2496                         return true;
2497
2498                 if (params.size() == 1)
2499                 {
2500                         TreeServer* ServerSource = Utils->FindServer(prefix);
2501                         if (ServerSource)
2502                         {
2503                                 ServerSource->SetPingFlag();
2504                         }
2505                 }
2506                 else
2507                 {
2508                         std::string forwardto = params[1];
2509                         if (forwardto == this->Instance->Config->ServerName)
2510                         {
2511                                 /*
2512                                  * this is a PONG for us
2513                                  * if the prefix is a user, check theyre local, and if they are,
2514                                  * dump the PONG reply back to their fd. If its a server, do nowt.
2515                                  * Services might want to send these s->s, but we dont need to yet.
2516                                  */
2517                                 userrec* u = this->Instance->FindNick(prefix);
2518
2519                                 if (u)
2520                                 {
2521                                         u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
2522                                 }
2523                         }
2524                         else
2525                         {
2526                                 // not for us, pass it on :)
2527                                 Utils->DoOneToOne(prefix,"PONG",params,forwardto);
2528                         }
2529                 }
2530
2531                 return true;
2532         }
2533
2534         bool MetaData(const std::string &prefix, std::deque<std::string> &params)
2535         {
2536                 if (params.size() < 3)
2537                         return true;
2538
2539                 TreeServer* ServerSource = Utils->FindServer(prefix);
2540
2541                 if (ServerSource)
2542                 {
2543                         if (params[0] == "*")
2544                         {
2545                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
2546                         }
2547                         else if (*(params[0].c_str()) == '#')
2548                         {
2549                                 chanrec* c = this->Instance->FindChan(params[0]);
2550                                 if (c)
2551                                 {
2552                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
2553                                 }
2554                         }
2555                         else if (*(params[0].c_str()) != '#')
2556                         {
2557                                 userrec* u = this->Instance->FindNick(params[0]);
2558                                 if (u)
2559                                 {
2560                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
2561                                 }
2562                         }
2563                 }
2564
2565                 params[2] = ":" + params[2];
2566                 Utils->DoOneToAllButSender(prefix,"METADATA",params,prefix);
2567                 return true;
2568         }
2569
2570         bool ServerVersion(const std::string &prefix, std::deque<std::string> &params)
2571         {
2572                 if (params.size() < 1)
2573                         return true;
2574
2575                 TreeServer* ServerSource = Utils->FindServer(prefix);
2576
2577                 if (ServerSource)
2578                 {
2579                         ServerSource->SetVersion(params[0]);
2580                 }
2581                 params[0] = ":" + params[0];
2582                 Utils->DoOneToAllButSender(prefix,"VERSION",params,prefix);
2583                 return true;
2584         }
2585
2586         bool ChangeHost(const std::string &prefix, std::deque<std::string> &params)
2587         {
2588                 if (params.size() < 1)
2589                         return true;
2590
2591                 userrec* u = this->Instance->FindNick(prefix);
2592
2593                 if (u)
2594                 {
2595                         u->ChangeDisplayedHost(params[0].c_str());
2596                         Utils->DoOneToAllButSender(prefix,"FHOST",params,u->server);
2597                 }
2598                 return true;
2599         }
2600
2601         bool AddLine(const std::string &prefix, std::deque<std::string> &params)
2602         {
2603                 if (params.size() < 6)
2604                         return true;
2605
2606                 bool propogate = false;
2607
2608                 switch (*(params[0].c_str()))
2609                 {
2610                         case 'Z':
2611                                 propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2612                                 Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2613                         break;
2614                         case 'Q':
2615                                 propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2616                                 Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2617                         break;
2618                         case 'E':
2619                                 propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2620                                 Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2621                         break;
2622                         case 'G':
2623                                 propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2624                                 Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2625                         break;
2626                         case 'K':
2627                                 propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2628                         break;
2629                         default:
2630                                 /* Just in case... */
2631                                 this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
2632                                 propogate = false;
2633                         break;
2634                 }
2635
2636                 /* Send it on its way */
2637                 if (propogate)
2638                 {
2639                         if (atoi(params[4].c_str()))
2640                         {
2641                                 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());
2642                         }
2643                         else
2644                         {
2645                                 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());
2646                         }
2647                         params[5] = ":" + params[5];
2648                         Utils->DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
2649                 }
2650                 if (!this->bursting)
2651                 {
2652                         Instance->Log(DEBUG,"Applying lines...");
2653                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2654                 }
2655                 return true;
2656         }
2657
2658         bool ChangeName(const std::string &prefix, std::deque<std::string> &params)
2659         {
2660                 if (params.size() < 1)
2661                         return true;
2662
2663                 userrec* u = this->Instance->FindNick(prefix);
2664
2665                 if (u)
2666                 {
2667                         u->ChangeName(params[0].c_str());
2668                         params[0] = ":" + params[0];
2669                         Utils->DoOneToAllButSender(prefix,"FNAME",params,u->server);
2670                 }
2671                 return true;
2672         }
2673
2674         bool Whois(const std::string &prefix, std::deque<std::string> &params)
2675         {
2676                 if (params.size() < 1)
2677                         return true;
2678
2679                 Instance->Log(DEBUG,"In IDLE command");
2680                 userrec* u = this->Instance->FindNick(prefix);
2681
2682                 if (u)
2683                 {
2684                         Instance->Log(DEBUG,"USER EXISTS: %s",u->nick);
2685                         // an incoming request
2686                         if (params.size() == 1)
2687                         {
2688                                 userrec* x = this->Instance->FindNick(params[0]);
2689                                 if ((x) && (IS_LOCAL(x)))
2690                                 {
2691                                         userrec* x = this->Instance->FindNick(params[0]);
2692                                         char signon[MAXBUF];
2693                                         char idle[MAXBUF];
2694
2695                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
2696                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-Instance->Time(true)));
2697                                         std::deque<std::string> par;
2698                                         par.push_back(prefix);
2699                                         par.push_back(signon);
2700                                         par.push_back(idle);
2701                                         // ours, we're done, pass it BACK
2702                                         Utils->DoOneToOne(params[0],"IDLE",par,u->server);
2703                                 }
2704                                 else
2705                                 {
2706                                         // not ours pass it on
2707                                         Utils->DoOneToOne(prefix,"IDLE",params,x->server);
2708                                 }
2709                         }
2710                         else if (params.size() == 3)
2711                         {
2712                                 std::string who_did_the_whois = params[0];
2713                                 userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
2714                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2715                                 {
2716                                         // an incoming reply to a whois we sent out
2717                                         std::string nick_whoised = prefix;
2718                                         unsigned long signon = atoi(params[1].c_str());
2719                                         unsigned long idle = atoi(params[2].c_str());
2720                                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2721                                                 do_whois(this->Instance,who_to_send_to,u,signon,idle,nick_whoised.c_str());
2722                                 }
2723                                 else
2724                                 {
2725                                         // not ours, pass it on
2726                                         Utils->DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
2727                                 }
2728                         }
2729                 }
2730                 return true;
2731         }
2732
2733         bool Push(const std::string &prefix, std::deque<std::string> &params)
2734         {
2735                 if (params.size() < 2)
2736                         return true;
2737
2738                 userrec* u = this->Instance->FindNick(params[0]);
2739
2740                 if (!u)
2741                         return true;
2742
2743                 if (IS_LOCAL(u))
2744                 {
2745                         u->Write(params[1]);
2746                 }
2747                 else
2748                 {
2749                         // continue the raw onwards
2750                         params[1] = ":" + params[1];
2751                         Utils->DoOneToOne(prefix,"PUSH",params,u->server);
2752                 }
2753                 return true;
2754         }
2755
2756         bool HandleSetTime(const std::string &prefix, std::deque<std::string> &params)
2757         {
2758                 if (!params.size() || !Utils->EnableTimeSync)
2759                         return true;
2760
2761                 bool force = false;
2762
2763                 if ((params.size() == 2) && (params[1] == "FORCE"))
2764                         force = true;
2765
2766                 time_t rts = atoi(params[0].c_str());
2767                 time_t us = Instance->Time(true);
2768
2769                 if (rts == us)
2770                 {
2771                         Instance->Log(DEBUG, "Timestamp from %s is equal", prefix.c_str());
2772
2773                         Utils->DoOneToAllButSender(prefix, "TIMESET", params, prefix);
2774                 }
2775                 else if (force || (rts < us))
2776                 {
2777                         int old = Instance->SetTimeDelta(rts - us);
2778                         Instance->Log(DEBUG, "%s TS (diff %d) from %s applied (old delta was %d)", (force) ? "Forced" : "Lower", rts - us, prefix.c_str(), old);
2779
2780                         Utils->DoOneToAllButSender(prefix, "TIMESET", params, prefix);
2781                 }
2782                 else
2783                 {
2784                         Instance->Log(DEBUG, "Higher TS (diff %d) from %s overridden", us - rts, prefix.c_str());
2785
2786                         std::deque<std::string> oparams;
2787                         oparams.push_back(ConvToStr(us));
2788
2789                         Utils->DoOneToMany(prefix, "TIMESET", oparams);
2790                 }
2791
2792                 return true;
2793         }
2794
2795         bool Time(const std::string &prefix, std::deque<std::string> &params)
2796         {
2797                 // :source.server TIME remote.server sendernick
2798                 // :remote.server TIME source.server sendernick TS
2799                 if (params.size() == 2)
2800                 {
2801                         // someone querying our time?
2802                         if (this->Instance->Config->ServerName == params[0])
2803                         {
2804                                 userrec* u = this->Instance->FindNick(params[1]);
2805                                 if (u)
2806                                 {
2807                                         params.push_back(ConvToStr(Instance->Time(false)));
2808                                         params[0] = prefix;
2809                                         Utils->DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
2810                                 }
2811                         }
2812                         else
2813                         {
2814                                 // not us, pass it on
2815                                 userrec* u = this->Instance->FindNick(params[1]);
2816                                 if (u)
2817                                         Utils->DoOneToOne(prefix,"TIME",params,params[0]);
2818                         }
2819                 }
2820                 else if (params.size() == 3)
2821                 {
2822                         // a response to a previous TIME
2823                         userrec* u = this->Instance->FindNick(params[1]);
2824                         if ((u) && (IS_LOCAL(u)))
2825                         {
2826                         time_t rawtime = atol(params[2].c_str());
2827                         struct tm * timeinfo;
2828                         timeinfo = localtime(&rawtime);
2829                                 char tms[26];
2830                                 snprintf(tms,26,"%s",asctime(timeinfo));
2831                                 tms[24] = 0;
2832                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
2833                         }
2834                         else
2835                         {
2836                                 if (u)
2837                                         Utils->DoOneToOne(prefix,"TIME",params,u->server);
2838                         }
2839                 }
2840                 return true;
2841         }
2842
2843         bool LocalPing(const std::string &prefix, std::deque<std::string> &params)
2844         {
2845                 if (params.size() < 1)
2846                         return true;
2847
2848                 if (params.size() == 1)
2849                 {
2850                         std::string stufftobounce = params[0];
2851                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
2852                         return true;
2853                 }
2854                 else
2855                 {
2856                         std::string forwardto = params[1];
2857                         if (forwardto == this->Instance->Config->ServerName)
2858                         {
2859                                 // this is a ping for us, send back PONG to the requesting server
2860                                 params[1] = params[0];
2861                                 params[0] = forwardto;
2862                                 Utils->DoOneToOne(forwardto,"PONG",params,params[1]);
2863                         }
2864                         else
2865                         {
2866                                 // not for us, pass it on :)
2867                                 Utils->DoOneToOne(prefix,"PING",params,forwardto);
2868                         }
2869                         return true;
2870                 }
2871         }
2872
2873         bool RemoveStatus(const std::string &prefix, std::deque<std::string> &params)
2874         {
2875                 if (params.size() < 1)
2876                         return true;
2877
2878                 chanrec* c = Instance->FindChan(params[0]);
2879
2880                 if (c)
2881                 {
2882                         irc::modestacker modestack(false);
2883                         CUList *ulist = c->GetUsers();
2884                         const char* y[127];
2885                         std::deque<std::string> stackresult;
2886                         std::string x;
2887
2888                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
2889                         {
2890                                 std::string modesequence = Instance->Modes->ModeString(i->second, c);
2891                                 if (modesequence.length())
2892                                 {
2893                                         Instance->Log(DEBUG,"Mode sequence = '%s'",modesequence.c_str());
2894                                         irc::spacesepstream sep(modesequence);
2895                                         std::string modeletters = sep.GetToken();
2896                                         Instance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2897
2898                                         while (!modeletters.empty())
2899                                         {
2900                                                 char mletter = *(modeletters.begin());
2901                                                 modestack.Push(mletter,sep.GetToken());
2902                                                 Instance->Log(DEBUG,"Push letter = '%c'",mletter);
2903                                                 modeletters.erase(modeletters.begin());
2904                                                 Instance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2905                                         }
2906                                 }
2907                         }
2908
2909                         while (modestack.GetStackedLine(stackresult))
2910                         {
2911                                 Instance->Log(DEBUG,"Stacked line size %d",stackresult.size());
2912                                 stackresult.push_front(ConvToStr(c->age));
2913                                 stackresult.push_front(c->name);
2914                                 Utils->DoOneToMany(Instance->Config->ServerName, "FMODE", stackresult);
2915                                 stackresult.erase(stackresult.begin() + 1);
2916                                 Instance->Log(DEBUG,"Stacked items:");
2917                                 for (size_t z = 0; z < stackresult.size(); z++)
2918                                 {
2919                                         y[z] = stackresult[z].c_str();
2920                                         Instance->Log(DEBUG,"\tstackresult[%d]='%s'",z,stackresult[z].c_str());
2921                                 }
2922                                 userrec* n = new userrec(Instance);
2923                                 n->SetFd(FD_MAGIC_NUMBER);
2924                                 Instance->SendMode(y, stackresult.size(), n);
2925                                 delete n;
2926                         }
2927                 }
2928                 return true;
2929         }
2930
2931         bool RemoteServer(const std::string &prefix, std::deque<std::string> &params)
2932         {
2933                 if (params.size() < 4)
2934                         return false;
2935
2936                 std::string servername = params[0];
2937                 std::string password = params[1];
2938                 // hopcount is not used for a remote server, we calculate this ourselves
2939                 std::string description = params[3];
2940                 TreeServer* ParentOfThis = Utils->FindServer(prefix);
2941
2942                 if (!ParentOfThis)
2943                 {
2944                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2945                         return false;
2946                 }
2947                 TreeServer* CheckDupe = Utils->FindServer(servername);
2948                 if (CheckDupe)
2949                 {
2950                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2951                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+servername+"\2 denied, already exists");
2952                         return false;
2953                 }
2954                 TreeServer* Node = new TreeServer(this->Utils,this->Instance,servername,description,ParentOfThis,NULL);
2955                 ParentOfThis->AddChild(Node);
2956                 params[3] = ":" + params[3];
2957                 Utils->DoOneToAllButSender(prefix,"SERVER",params,prefix);
2958                 this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2959                 return true;
2960         }
2961
2962         bool Outbound_Reply_Server(std::deque<std::string> &params)
2963         {
2964                 if (params.size() < 4)
2965                         return false;
2966
2967                 irc::string servername = params[0].c_str();
2968                 std::string sname = params[0];
2969                 std::string password = params[1];
2970                 int hops = atoi(params[2].c_str());
2971
2972                 if (hops)
2973                 {
2974                         this->WriteLine("ERROR :Server too far away for authentication");
2975                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2976                         return false;
2977                 }
2978                 std::string description = params[3];
2979                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
2980                 {
2981                         if ((x->Name == servername) && (x->RecvPass == password))
2982                         {
2983                                 TreeServer* CheckDupe = Utils->FindServer(sname);
2984                                 if (CheckDupe)
2985                                 {
2986                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2987                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2988                                         return false;
2989                                 }
2990                                 // Begin the sync here. this kickstarts the
2991                                 // other side, waiting in WAIT_AUTH_2 state,
2992                                 // into starting their burst, as it shows
2993                                 // that we're happy.
2994                                 this->LinkState = CONNECTED;
2995                                 // we should add the details of this server now
2996                                 // to the servers tree, as a child of the root
2997                                 // node.
2998                                 TreeServer* Node = new TreeServer(this->Utils,this->Instance,sname,description,Utils->TreeRoot,this);
2999                                 Utils->TreeRoot->AddChild(Node);
3000                                 params[3] = ":" + params[3];
3001                                 Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,sname);
3002                                 this->bursting = true;
3003                                 this->DoBurst(Node);
3004                                 return true;
3005                         }
3006                 }
3007                 this->WriteLine("ERROR :Invalid credentials");
3008                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
3009                 return false;
3010         }
3011
3012         bool Inbound_Server(std::deque<std::string> &params)
3013         {
3014                 if (params.size() < 4)
3015                         return false;
3016
3017                 irc::string servername = params[0].c_str();
3018                 std::string sname = params[0];
3019                 std::string password = params[1];
3020                 int hops = atoi(params[2].c_str());
3021
3022                 if (hops)
3023                 {
3024                         this->WriteLine("ERROR :Server too far away for authentication");
3025                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
3026                         return false;
3027                 }
3028                 std::string description = params[3];
3029                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
3030                 {
3031                         if ((x->Name == servername) && (x->RecvPass == password))
3032                         {
3033                                 TreeServer* CheckDupe = Utils->FindServer(sname);
3034                                 if (CheckDupe)
3035                                 {
3036                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
3037                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
3038                                         return false;
3039                                 }
3040                                 this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
3041
3042                                 if (this->Hook)
3043                                 {
3044                                         std::string name = InspSocketNameRequest((Module*)Utils->Creator, this->Hook).Send();
3045                                         this->Instance->SNO->WriteToSnoMask('l',"Connection from \2"+sname+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] using transport \2"+name+"\2");
3046                                 }
3047
3048                                 this->InboundServerName = sname;
3049                                 this->InboundDescription = description;
3050                                 // this is good. Send our details: Our server name and description and hopcount of 0,
3051                                 // along with the sendpass from this block.
3052                                 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
3053                                 // move to the next state, we are now waiting for THEM.
3054                                 this->LinkState = WAIT_AUTH_2;
3055                                 return true;
3056                         }
3057                 }
3058                 this->WriteLine("ERROR :Invalid credentials");
3059                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
3060                 return false;
3061         }
3062
3063         void Split(const std::string &line, std::deque<std::string> &n)
3064         {
3065                 n.clear();
3066                 irc::tokenstream tokens(line);
3067                 std::string param;
3068                 while ((param = tokens.GetToken()) != "")
3069                         n.push_back(param);
3070                 return;
3071         }
3072
3073         bool ProcessLine(std::string &line)
3074         {
3075                 std::deque<std::string> params;
3076                 irc::string command;
3077                 std::string prefix;
3078
3079                 line = line.substr(0, line.find_first_of("\r\n"));
3080
3081                 if (line.empty())
3082                         return true;
3083
3084                 Instance->Log(DEBUG,"IN: %s", line.c_str());
3085
3086                 this->Split(line.c_str(),params);
3087
3088                 if ((params[0][0] == ':') && (params.size() > 1))
3089                 {
3090                         prefix = params[0].substr(1);
3091                         params.pop_front();
3092                 }
3093
3094                 command = params[0].c_str();
3095                 params.pop_front();
3096
3097                 switch (this->LinkState)
3098                 {
3099                         TreeServer* Node;
3100
3101                         case WAIT_AUTH_1:
3102                                 // Waiting for SERVER command from remote server. Server initiating
3103                                 // the connection sends the first SERVER command, listening server
3104                                 // replies with theirs if its happy, then if the initiator is happy,
3105                                 // it starts to send its net sync, which starts the merge, otherwise
3106                                 // it sends an ERROR.
3107                                 if (command == "PASS")
3108                                 {
3109                                         /* Silently ignored */
3110                                 }
3111                                 else if (command == "SERVER")
3112                                 {
3113                                         return this->Inbound_Server(params);
3114                                 }
3115                                 else if (command == "ERROR")
3116                                 {
3117                                         return this->Error(params);
3118                                 }
3119                                 else if (command == "USER")
3120                                 {
3121                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
3122                                         return false;
3123                                 }
3124                                 else if (command == "CAPAB")
3125                                 {
3126                                         return this->Capab(params);
3127                                 }
3128                                 else if ((command == "U") || (command == "S"))
3129                                 {
3130                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3131                                         return false;
3132                                 }
3133                                 else
3134                                 {
3135                                         std::string error("ERROR :Invalid command in negotiation phase: ");
3136                                         error.append(command.c_str());
3137                                         this->WriteLine(error);
3138                                         return false;
3139                                 }
3140                         break;
3141                         case WAIT_AUTH_2:
3142                                 // Waiting for start of other side's netmerge to say they liked our
3143                                 // password.
3144                                 if (command == "SERVER")
3145                                 {
3146                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
3147                                         // silently ignore.
3148                                         return true;
3149                                 }
3150                                 else if ((command == "U") || (command == "S"))
3151                                 {
3152                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3153                                         return false;
3154                                 }
3155                                 else if (command == "BURST")
3156                                 {
3157                                         if (params.size() && Utils->EnableTimeSync)
3158                                         {
3159                                                 /* If a time stamp is provided, apply synchronization */
3160                                                 bool force = false;
3161                                                 time_t them = atoi(params[0].c_str());
3162                                                 time_t us = Instance->Time(true);
3163                                                 int delta = them - us;
3164
3165                                                 if ((params.size() == 2) && (params[1] == "FORCE"))
3166                                                         force = true;
3167
3168                                                 if ((delta < -600) || (delta > 600))
3169                                                 {
3170                                                         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));
3171                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
3172                                                         return false;
3173                                                 }
3174
3175                                                 if (us == them)
3176                                                 {
3177                                                         this->Instance->Log(DEBUG, "Timestamps are equal; pat yourself on the back");
3178                                                 }
3179                                                 else if (force || (us > them))
3180                                                 {
3181                                                         this->Instance->Log(DEBUG, "Remote server has lower TS (%d seconds)", them - us);
3182                                                         this->Instance->SetTimeDelta(them - us);
3183                                                         // Send this new timestamp to any other servers
3184                                                         Utils->DoOneToMany(Utils->TreeRoot->GetName(), "TIMESET", params);
3185                                                 }
3186                                                 else
3187                                                 {
3188                                                         // Override the timestamp
3189                                                         this->Instance->Log(DEBUG, "We have a higher timestamp (by %d seconds), not updating delta", us - them);
3190                                                         this->WriteLine(":" + Utils->TreeRoot->GetName() + " TIMESET " + ConvToStr(us));
3191                                                 }
3192                                         }
3193                                         this->LinkState = CONNECTED;
3194                                         Node = new TreeServer(this->Utils,this->Instance,InboundServerName,InboundDescription,Utils->TreeRoot,this);
3195                                         Utils->TreeRoot->AddChild(Node);
3196                                         params.clear();
3197                                         params.push_back(InboundServerName);
3198                                         params.push_back("*");
3199                                         params.push_back("1");
3200                                         params.push_back(":"+InboundDescription);
3201                                         Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,InboundServerName);
3202                                         this->bursting = true;
3203                                         this->DoBurst(Node);
3204                                 }
3205                                 else if (command == "ERROR")
3206                                 {
3207                                         return this->Error(params);
3208                                 }
3209                                 else if (command == "CAPAB")
3210                                 {
3211                                         return this->Capab(params);
3212                                 }
3213
3214                         break;
3215                         case LISTENER:
3216                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
3217                                 return false;
3218                         break;
3219                         case CONNECTING:
3220                                 if (command == "SERVER")
3221                                 {
3222                                         // another server we connected to, which was in WAIT_AUTH_1 state,
3223                                         // has just sent us their credentials. If we get this far, theyre
3224                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
3225                                         // if we're happy with this, we should send our netburst which
3226                                         // kickstarts the merge.
3227                                         return this->Outbound_Reply_Server(params);
3228                                 }
3229                                 else if (command == "ERROR")
3230                                 {
3231                                         return this->Error(params);
3232                                 }
3233                         break;
3234                         case CONNECTED:
3235                                 // This is the 'authenticated' state, when all passwords
3236                                 // have been exchanged and anything past this point is taken
3237                                 // as gospel.
3238
3239                                 if (prefix != "")
3240                                 {
3241                                         std::string direction = prefix;
3242                                         userrec* t = this->Instance->FindNick(prefix);
3243                                         if (t)
3244                                         {
3245                                                 direction = t->server;
3246                                         }
3247                                         TreeServer* route_back_again = Utils->BestRouteTo(direction);
3248                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
3249                                         {
3250                                                 if (route_back_again)
3251                                                         Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
3252                                                 return true;
3253                                         }
3254
3255                                         /* Fix by brain:
3256                                          * When there is activity on the socket, reset the ping counter so
3257                                          * that we're not wasting bandwidth pinging an active server.
3258                                          */
3259                                         route_back_again->SetNextPingTime(time(NULL) + 60);
3260                                         route_back_again->SetPingFlag();
3261                                 }
3262
3263                                 if (command == "SVSMODE")
3264                                 {
3265                                         /* Services expects us to implement
3266                                          * SVSMODE. In inspircd its the same as
3267                                          * MODE anyway.
3268                                          */
3269                                         command = "MODE";
3270                                 }
3271                                 std::string target = "";
3272                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
3273                                  * working with std::string here.
3274                                  */
3275                                 if ((command == "NICK") && (params.size() > 1))
3276                                 {
3277                                         return this->IntroduceClient(prefix,params);
3278                                 }
3279                                 else if (command == "FJOIN")
3280                                 {
3281                                         return this->ForceJoin(prefix,params);
3282                                 }
3283                                 else if (command == "STATS")
3284                                 {
3285                                         return this->Stats(prefix, params);
3286                                 }
3287                                 else if (command == "MOTD")
3288                                 {
3289                                         return this->Motd(prefix, params);
3290                                 }
3291                                 else if (command == "ADMIN")
3292                                 {
3293                                         return this->Admin(prefix, params);
3294                                 }
3295                                 else if (command == "SERVER")
3296                                 {
3297                                         return this->RemoteServer(prefix,params);
3298                                 }
3299                                 else if (command == "ERROR")
3300                                 {
3301                                         return this->Error(params);
3302                                 }
3303                                 else if (command == "OPERTYPE")
3304                                 {
3305                                         return this->OperType(prefix,params);
3306                                 }
3307                                 else if (command == "FMODE")
3308                                 {
3309                                         return this->ForceMode(prefix,params);
3310                                 }
3311                                 else if (command == "KILL")
3312                                 {
3313                                         return this->RemoteKill(prefix,params);
3314                                 }
3315                                 else if (command == "FTOPIC")
3316                                 {
3317                                         return this->ForceTopic(prefix,params);
3318                                 }
3319                                 else if (command == "REHASH")
3320                                 {
3321                                         return this->RemoteRehash(prefix,params);
3322                                 }
3323                                 else if (command == "METADATA")
3324                                 {
3325                                         return this->MetaData(prefix,params);
3326                                 }
3327                                 else if (command == "REMSTATUS")
3328                                 {
3329                                         return this->RemoveStatus(prefix,params);
3330                                 }
3331                                 else if (command == "PING")
3332                                 {
3333                                         /*
3334                                          * We just got a ping from a server that's bursting.
3335                                          * This can't be right, so set them to not bursting, and
3336                                          * apply their lines.
3337                                          */
3338                                         if (this->bursting)
3339                                         {
3340                                                 this->bursting = false;
3341                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3342                                         }
3343                                         if (prefix == "")
3344                                         {
3345                                                 prefix = this->GetName();
3346                                         }
3347                                         return this->LocalPing(prefix,params);
3348                                 }
3349                                 else if (command == "PONG")
3350                                 {
3351                                         /*
3352                                          * We just got a pong from a server that's bursting.
3353                                          * This can't be right, so set them to not bursting, and
3354                                          * apply their lines.
3355                                          */
3356                                         if (this->bursting)
3357                                         {
3358                                                 this->bursting = false;
3359                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3360                                         }
3361                                         if (prefix == "")
3362                                         {
3363                                                 prefix = this->GetName();
3364                                         }
3365                                         return this->LocalPong(prefix,params);
3366                                 }
3367                                 else if (command == "VERSION")
3368                                 {
3369                                         return this->ServerVersion(prefix,params);
3370                                 }
3371                                 else if (command == "FHOST")
3372                                 {
3373                                         return this->ChangeHost(prefix,params);
3374                                 }
3375                                 else if (command == "FNAME")
3376                                 {
3377                                         return this->ChangeName(prefix,params);
3378                                 }
3379                                 else if (command == "ADDLINE")
3380                                 {
3381                                         return this->AddLine(prefix,params);
3382                                 }
3383                                 else if (command == "SVSNICK")
3384                                 {
3385                                         if (prefix == "")
3386                                         {
3387                                                 prefix = this->GetName();
3388                                         }
3389                                         return this->ForceNick(prefix,params);
3390                                 }
3391                                 else if (command == "RSQUIT")
3392                                 {
3393                                         return this->RemoteSquit(prefix, params);
3394                                 }
3395                                 else if (command == "IDLE")
3396                                 {
3397                                         return this->Whois(prefix,params);
3398                                 }
3399                                 else if (command == "PUSH")
3400                                 {
3401                                         return this->Push(prefix,params);
3402                                 }
3403                                 else if (command == "TIMESET")
3404                                 {
3405                                         return this->HandleSetTime(prefix, params);
3406                                 }
3407                                 else if (command == "TIME")
3408                                 {
3409                                         return this->Time(prefix,params);
3410                                 }
3411                                 else if ((command == "KICK") && (Utils->IsServer(prefix)))
3412                                 {
3413                                         std::string sourceserv = this->myhost;
3414                                         if (params.size() == 3)
3415                                         {
3416                                                 userrec* user = this->Instance->FindNick(params[1]);
3417                                                 chanrec* chan = this->Instance->FindChan(params[0]);
3418                                                 if (user && chan)
3419                                                 {
3420                                                         if (!chan->ServerKickUser(user, params[2].c_str(), false))
3421                                                                 /* Yikes, the channels gone! */
3422                                                                 delete chan;
3423                                                 }
3424                                         }
3425                                         if (this->InboundServerName != "")
3426                                         {
3427                                                 sourceserv = this->InboundServerName;
3428                                         }
3429                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3430                                 }
3431                                 else if (command == "SVSJOIN")
3432                                 {
3433                                         if (prefix == "")
3434                                         {
3435                                                 prefix = this->GetName();
3436                                         }
3437                                         return this->ServiceJoin(prefix,params);
3438                                 }
3439                                 else if (command == "SQUIT")
3440                                 {
3441                                         if (params.size() == 2)
3442                                         {
3443                                                 this->Squit(Utils->FindServer(params[0]),params[1]);
3444                                         }
3445                                         return true;
3446                                 }
3447                                 else if (command == "OPERNOTICE")
3448                                 {
3449                                         std::string sourceserv = this->myhost;
3450
3451                                         if (this->InboundServerName != "")
3452                                                 sourceserv = this->InboundServerName;
3453
3454                                         if (params.size() >= 1)
3455                                                 Instance->WriteOpers("*** From " + sourceserv + ": " + params[0]);
3456
3457                                         return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
3458                                 }
3459                                 else if (command == "MODENOTICE")
3460                                 {
3461                                         std::string sourceserv = this->myhost;
3462                                         if (this->InboundServerName != "")
3463                                                 sourceserv = this->InboundServerName;
3464                                         if (params.size() >= 2)
3465                                         {
3466                                                 Instance->WriteMode(params[0].c_str(), WM_AND, "*** From %s: %s", sourceserv.c_str(), params[1].c_str());
3467                                         }
3468
3469                                         return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
3470                                 }
3471                                 else if (command == "SNONOTICE")
3472                                 {
3473                                         std::string sourceserv = this->myhost;
3474                                         if (this->InboundServerName != "")
3475                                                 sourceserv = this->InboundServerName;
3476                                         if (params.size() >= 2)
3477                                         {
3478                                                 Instance->SNO->WriteToSnoMask(*(params[0].c_str()), "From " + sourceserv + ": "+ params[1]);
3479                                         }
3480
3481                                         return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
3482                                 }
3483                                 else if (command == "ENDBURST")
3484                                 {
3485                                         this->bursting = false;
3486                                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3487                                         std::string sourceserv = this->myhost;
3488                                         if (this->InboundServerName != "")
3489                                         {
3490                                                 sourceserv = this->InboundServerName;
3491                                         }
3492                                         this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
3493
3494                                         Event rmode((char*)sourceserv.c_str(), (Module*)Utils->Creator, "new_server");
3495                                         rmode.Send(Instance);
3496
3497                                         return true;
3498                                 }
3499                                 else
3500                                 {
3501                                         // not a special inter-server command.
3502                                         // Emulate the actual user doing the command,
3503                                         // this saves us having a huge ugly parser.
3504                                         userrec* who = this->Instance->FindNick(prefix);
3505                                         std::string sourceserv = this->myhost;
3506                                         if (this->InboundServerName != "")
3507                                         {
3508                                                 sourceserv = this->InboundServerName;
3509                                         }
3510                                         if ((!who) && (command == "MODE"))
3511                                         {
3512                                                 if (Utils->IsServer(prefix))
3513                                                 {
3514                                                         const char* modelist[127];
3515                                                         for (size_t i = 0; i < params.size(); i++)
3516                                                                 modelist[i] = params[i].c_str();
3517
3518                                                         userrec* fake = new userrec(Instance);
3519                                                         fake->SetFd(FD_MAGIC_NUMBER);
3520
3521                                                         this->Instance->SendMode(modelist, params.size(), fake);
3522
3523                                                         delete fake;
3524
3525                                                         /* Hot potato! pass it on! */
3526                                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3527                                                 }
3528                                         }
3529                                         if (who)
3530                                         {
3531                                                 if ((command == "NICK") && (params.size() > 0))
3532                                                 {
3533                                                         /* On nick messages, check that the nick doesnt
3534                                                          * already exist here. If it does, kill their copy,
3535                                                          * and our copy.
3536                                                          */
3537                                                         userrec* x = this->Instance->FindNick(params[0]);
3538                                                         if ((x) && (x != who))
3539                                                         {
3540                                                                 std::deque<std::string> p;
3541                                                                 p.push_back(params[0]);
3542                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
3543                                                                 Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3544                                                                 p.clear();
3545                                                                 p.push_back(prefix);
3546                                                                 p.push_back("Nickname collision");
3547                                                                 Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3548                                                                 userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
3549                                                                 userrec* y = this->Instance->FindNick(prefix);
3550                                                                 if (y)
3551                                                                 {
3552                                                                         userrec::QuitUser(this->Instance,y,"Nickname collision");
3553                                                                 }
3554                                                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3555                                                         }
3556                                                 }
3557                                                 // its a user
3558                                                 target = who->server;
3559                                                 const char* strparams[127];
3560                                                 for (unsigned int q = 0; q < params.size(); q++)
3561                                                 {
3562                                                         strparams[q] = params[q].c_str();
3563                                                 }
3564                                                 switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
3565                                                 {
3566                                                         case CMD_INVALID:
3567                                                                 this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
3568                                                                 return false;
3569                                                         break;
3570                                                         case CMD_FAILURE:
3571                                                                 return true;
3572                                                         break;
3573                                                         default:
3574                                                                 /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
3575                                                         break;
3576                                                 }
3577                                         }
3578                                         else
3579                                         {
3580                                                 // its not a user. Its either a server, or somethings screwed up.
3581                                                 if (Utils->IsServer(prefix))
3582                                                 {
3583                                                         target = this->Instance->Config->ServerName;
3584                                                 }
3585                                                 else
3586                                                 {
3587                                                         Instance->Log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
3588                                                         return true;
3589                                                 }
3590                                         }
3591                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3592
3593                                 }
3594                                 return true;
3595                         break;
3596                 }
3597                 return true;
3598         }
3599
3600         virtual std::string GetName()
3601         {
3602                 std::string sourceserv = this->myhost;
3603                 if (this->InboundServerName != "")
3604                 {
3605                         sourceserv = this->InboundServerName;
3606                 }
3607                 return sourceserv;
3608         }
3609
3610         virtual void OnTimeout()
3611         {
3612                 if (this->LinkState == CONNECTING)
3613                 {
3614                         this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out.");
3615                         Link* MyLink = Utils->FindLink(myhost);
3616                         if (MyLink)
3617                                 Utils->DoFailOver(MyLink);
3618                 }
3619         }
3620
3621         virtual void OnClose()
3622         {
3623                 // Connection closed.
3624                 // If the connection is fully up (state CONNECTED)
3625                 // then propogate a netsplit to all peers.
3626                 std::string quitserver = this->myhost;
3627                 if (this->InboundServerName != "")
3628                 {
3629                         quitserver = this->InboundServerName;
3630                 }
3631                 TreeServer* s = Utils->FindServer(quitserver);
3632                 if (s)
3633                 {
3634                         Squit(s,"Remote host closed the connection");
3635                 }
3636
3637                 if (quitserver != "")
3638                         this->Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' failed.",quitserver.c_str());
3639         }
3640
3641         virtual int OnIncomingConnection(int newsock, char* ip)
3642         {
3643                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
3644                  * or discovering if this port is the server port, we don't allow connections from any
3645                  * IPs for which we don't have a link block.
3646                  */
3647                 bool found = false;
3648
3649                 found = (std::find(Utils->ValidIPs.begin(), Utils->ValidIPs.end(), ip) != Utils->ValidIPs.end());
3650                 if (!found)
3651                 {
3652                         for (vector<std::string>::iterator i = Utils->ValidIPs.begin(); i != Utils->ValidIPs.end(); i++)
3653                                 if (irc::sockets::MatchCIDR(ip, (*i).c_str()))
3654                                         found = true;
3655
3656                         if (!found)
3657                         {
3658                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from %s denied (no link blocks with that IP address)", ip);
3659                                 close(newsock);
3660                                 return false;
3661                         }
3662                 }
3663
3664                 TreeSocket* s = new TreeSocket(this->Utils, this->Instance, newsock, ip, this->Hook);
3665
3666                 s = s; /* Whinge whinge whinge, thats all GCC ever does. */
3667                 return true;
3668         }
3669 };
3670
3671 /** This class is used to resolve server hostnames during /connect and autoconnect.
3672  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
3673  * resolver step first ourselves if we need it. This is totally nonblocking, and will
3674  * callback to OnLookupComplete or OnError when completed. Once it has completed we
3675  * will have an IP address which we can then use to continue our connection.
3676  */
3677 class ServernameResolver : public Resolver
3678 {
3679  private:
3680         /** A copy of the Link tag info for what we're connecting to.
3681          * We take a copy, rather than using a pointer, just in case the
3682          * admin takes the tag away and rehashes while the domain is resolving.
3683          */
3684         Link MyLink;
3685         SpanningTreeUtilities* Utils;
3686  public:
3687         ServernameResolver(Module* me, SpanningTreeUtilities* Util, InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD, me), MyLink(x), Utils(Util)
3688         {
3689                 /* Nothing in here, folks */
3690         }
3691
3692         void OnLookupComplete(const std::string &result)
3693         {
3694                 /* Initiate the connection, now that we have an IP to use.
3695                  * Passing a hostname directly to InspSocket causes it to
3696                  * just bail and set its FD to -1.
3697                  */
3698                 TreeServer* CheckDupe = Utils->FindServer(MyLink.Name.c_str());
3699                 if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
3700                 {
3701
3702                         if ((!MyLink.Hook.empty()) && (Utils->hooks.find(MyLink.Hook.c_str()) ==  Utils->hooks.end()))
3703                                 return;
3704
3705                         TreeSocket* newsocket = new TreeSocket(this->Utils, ServerInstance, result,MyLink.Port,false,MyLink.Timeout ? MyLink.Timeout : 10,MyLink.Name.c_str(),
3706                                         MyLink.Hook.empty() ? NULL : Utils->hooks[MyLink.Hook.c_str()]);
3707                         if (newsocket->GetFd() > -1)
3708                         {
3709                                 /* We're all OK */
3710                         }
3711                         else
3712                         {
3713                                 /* Something barfed, show the opers */
3714                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
3715                                 delete newsocket;
3716                                 Utils->DoFailOver(&MyLink);
3717                         }
3718                 }
3719         }
3720
3721         void OnError(ResolverError e, const std::string &errormessage)
3722         {
3723                 /* Ooops! */
3724                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
3725                 Utils->DoFailOver(&MyLink);
3726         }
3727 };
3728
3729 /** Handle resolving of server IPs for the cache
3730  */
3731 class SecurityIPResolver : public Resolver
3732 {
3733  private:
3734         Link MyLink;
3735         SpanningTreeUtilities* Utils;
3736  public:
3737         SecurityIPResolver(Module* me, SpanningTreeUtilities* U, InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD, me), MyLink(x), Utils(U)
3738         {
3739         }
3740
3741         void OnLookupComplete(const std::string &result)
3742         {
3743                 ServerInstance->Log(DEBUG,"Security IP cache: Adding IP address '%s' for Link '%s'",result.c_str(),MyLink.Name.c_str());
3744                 Utils->ValidIPs.push_back(result);
3745         }
3746
3747         void OnError(ResolverError e, const std::string &errormessage)
3748         {
3749                 ServerInstance->Log(DEBUG,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str());
3750         }
3751 };
3752
3753 SpanningTreeUtilities::SpanningTreeUtilities(InspIRCd* Instance, ModuleSpanningTree* C) : ServerInstance(Instance), Creator(C)
3754 {
3755         Bindings.clear();
3756
3757         this->TreeRoot = new TreeServer(this, ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc);
3758
3759         modulelist* ml = ServerInstance->FindInterface("InspSocketHook");
3760
3761         /* Did we find any modules? */
3762         if (ml)
3763         {
3764                 /* Yes, enumerate them all to find out the hook name */
3765                 for (modulelist::iterator m = ml->begin(); m != ml->end(); m++)
3766                 {
3767                         /* Make a request to it for its name, its implementing
3768                          * InspSocketHook so we know its safe to do this
3769                          */
3770                         std::string name = InspSocketNameRequest((Module*)Creator, *m).Send();
3771                         /* Build a map of them */
3772                         hooks[name.c_str()] = *m;
3773                         hooknames.push_back(name);
3774                         ServerInstance->Log(DEBUG, "Found InspSocketHook interface: '%s' -> '%08x'", name.c_str(), *m);
3775                 }
3776         }
3777
3778         this->ReadConfiguration(true);
3779 }
3780
3781 SpanningTreeUtilities::~SpanningTreeUtilities()
3782 {
3783         for (unsigned int i = 0; i < Bindings.size(); i++)
3784         {
3785                 ServerInstance->Log(DEBUG,"Freeing binding %d of %d",i, Bindings.size());
3786                 ServerInstance->SE->DelFd(Bindings[i]);
3787                 Bindings[i]->Close();
3788                 DELETE(Bindings[i]);
3789         }
3790         ServerInstance->Log(DEBUG,"Freeing connected servers...");
3791         while (TreeRoot->ChildCount())
3792         {
3793                 TreeServer* child_server = TreeRoot->GetChild(0);
3794                 ServerInstance->Log(DEBUG,"Freeing connected server %s", child_server->GetName().c_str());
3795                 if (child_server)
3796                 {
3797                         TreeSocket* sock = child_server->GetSocket();
3798                         ServerInstance->SE->DelFd(sock);
3799                         sock->Close();
3800                         DELETE(sock);
3801                 }
3802         }
3803         delete TreeRoot;
3804 }
3805
3806 void SpanningTreeUtilities::AddThisServer(TreeServer* server, TreeServerList &list)
3807 {
3808         if (list.find(server) == list.end())
3809                 list[server] = server;
3810 }
3811
3812 /** returns a list of DIRECT servernames for a specific channel */
3813 void SpanningTreeUtilities::GetListOfServersForChannel(chanrec* c, TreeServerList &list, char status, const CUList &exempt_list)
3814 {
3815         CUList *ulist;
3816         switch (status)
3817         {
3818                 case '@':
3819                         ulist = c->GetOppedUsers();
3820                 break;
3821                 case '%':
3822                         ulist = c->GetHalfoppedUsers();
3823                 break;
3824                 case '+':
3825                         ulist = c->GetVoicedUsers();
3826                 break;
3827                 default:
3828                         ulist = c->GetUsers();
3829                 break;
3830         }
3831         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
3832         {
3833                 if ((i->second->GetFd() < 0) && (exempt_list.find(i->second) == exempt_list.end()))
3834                 {
3835                         TreeServer* best = this->BestRouteTo(i->second->server);
3836                         if (best)
3837                                 AddThisServer(best,list);
3838                 }
3839         }
3840         return;
3841 }
3842
3843 bool SpanningTreeUtilities::DoOneToAllButSenderRaw(const std::string &data, const std::string &omit, const std::string &prefix, const irc::string &command, std::deque<std::string> &params)
3844 {
3845         char pfx = 0;
3846         TreeServer* omitroute = this->BestRouteTo(omit);
3847         if ((command == "NOTICE") || (command == "PRIVMSG"))
3848         {
3849                 if (params.size() >= 2)
3850                 {
3851                         /* Prefixes */
3852                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
3853                         {
3854                                 pfx = params[0][0];
3855                                 params[0] = params[0].substr(1, params[0].length()-1);
3856                         }
3857                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
3858                         {
3859                                 // special routing for private messages/notices
3860                                 userrec* d = ServerInstance->FindNick(params[0]);
3861                                 if (d)
3862                                 {
3863                                         std::deque<std::string> par;
3864                                         par.push_back(params[0]);
3865                                         par.push_back(":"+params[1]);
3866                                         this->DoOneToOne(prefix,command.c_str(),par,d->server);
3867                                         return true;
3868                                 }
3869                         }
3870                         else if (*(params[0].c_str()) == '$')
3871                         {
3872                                 std::deque<std::string> par;
3873                                 par.push_back(params[0]);
3874                                 par.push_back(":"+params[1]);
3875                                 this->DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
3876                                 return true;
3877                         }
3878                         else
3879                         {
3880                                 chanrec* c = ServerInstance->FindChan(params[0]);
3881                                 userrec* u = ServerInstance->FindNick(prefix);
3882                                 if (c && u)
3883                                 {
3884                                         CUList elist;
3885                                         TreeServerList list;
3886                                         FOREACH_MOD(I_OnBuildExemptList, OnBuildExemptList((command == "PRIVMSG" ? MSG_PRIVMSG : MSG_NOTICE), c, u, pfx, elist));
3887                                         GetListOfServersForChannel(c,list,pfx,elist);
3888
3889                                         for (TreeServerList::iterator i = list.begin(); i != list.end(); i++)
3890                                         {
3891                                                 TreeSocket* Sock = i->second->GetSocket();
3892                                                 if ((Sock) && (i->second->GetName() != omit) && (omitroute != i->second))
3893                                                 {
3894                                                         Sock->WriteLine(data);
3895                                                 }
3896                                         }
3897                                         return true;
3898                                 }
3899                         }
3900                 }
3901         }
3902         unsigned int items =this->TreeRoot->ChildCount();
3903         for (unsigned int x = 0; x < items; x++)
3904         {
3905                 TreeServer* Route = this->TreeRoot->GetChild(x);
3906                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3907                 {
3908                         TreeSocket* Sock = Route->GetSocket();
3909                         if (Sock)
3910                                 Sock->WriteLine(data);
3911                 }
3912         }
3913         return true;
3914 }
3915
3916 bool SpanningTreeUtilities::DoOneToAllButSender(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string omit)
3917 {
3918         TreeServer* omitroute = this->BestRouteTo(omit);
3919         std::string FullLine = ":" + prefix + " " + command;
3920         unsigned int words = params.size();
3921         for (unsigned int x = 0; x < words; x++)
3922         {
3923                 FullLine = FullLine + " " + params[x];
3924         }
3925         unsigned int items = this->TreeRoot->ChildCount();
3926         for (unsigned int x = 0; x < items; x++)
3927         {
3928                 TreeServer* Route = this->TreeRoot->GetChild(x);
3929                 // Send the line IF:
3930                 // The route has a socket (its a direct connection)
3931                 // The route isnt the one to be omitted
3932                 // The route isnt the path to the one to be omitted
3933                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3934                 {
3935                         TreeSocket* Sock = Route->GetSocket();
3936                         if (Sock)
3937                                 Sock->WriteLine(FullLine);
3938                 }
3939         }
3940         return true;
3941 }
3942
3943 bool SpanningTreeUtilities::DoOneToMany(const std::string &prefix, const std::string &command, std::deque<std::string> &params)
3944 {
3945         std::string FullLine = ":" + prefix + " " + command;
3946         unsigned int words = params.size();
3947         for (unsigned int x = 0; x < words; x++)
3948         {
3949                 FullLine = FullLine + " " + params[x];
3950         }
3951         unsigned int items = this->TreeRoot->ChildCount();
3952         for (unsigned int x = 0; x < items; x++)
3953         {
3954                 TreeServer* Route = this->TreeRoot->GetChild(x);
3955                 if (Route && Route->GetSocket())
3956                 {
3957                         TreeSocket* Sock = Route->GetSocket();
3958                         if (Sock)
3959                                 Sock->WriteLine(FullLine);
3960                 }
3961         }
3962         return true;
3963 }
3964
3965 bool SpanningTreeUtilities::DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params)
3966 {
3967         std::string spfx = prefix;
3968         std::string scmd = command;
3969         return this->DoOneToMany(spfx, scmd, params);
3970 }
3971
3972 bool SpanningTreeUtilities::DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit)
3973 {
3974         std::string spfx = prefix;
3975         std::string scmd = command;
3976         return this->DoOneToAllButSender(spfx, scmd, params, omit);
3977 }
3978
3979 bool SpanningTreeUtilities::DoOneToOne(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string target)
3980 {
3981         TreeServer* Route = this->BestRouteTo(target);
3982         if (Route)
3983         {
3984                 std::string FullLine = ":" + prefix + " " + command;
3985                 unsigned int words = params.size();
3986                 for (unsigned int x = 0; x < words; x++)
3987                 {
3988                         FullLine = FullLine + " " + params[x];
3989                 }
3990                 if (Route && Route->GetSocket())
3991                 {
3992                         TreeSocket* Sock = Route->GetSocket();
3993                         if (Sock)
3994                                 Sock->WriteLine(FullLine);
3995                 }
3996                 return true;
3997         }
3998         else
3999         {
4000                 return false;
4001         }
4002 }
4003
4004 void SpanningTreeUtilities::ReadConfiguration(bool rebind)
4005 {
4006         ConfigReader* Conf = new ConfigReader(ServerInstance);
4007         if (rebind)
4008         {
4009                 for (int j =0; j < Conf->Enumerate("bind"); j++)
4010                 {
4011                         std::string Type = Conf->ReadValue("bind","type",j);
4012                         std::string IP = Conf->ReadValue("bind","address",j);
4013                         std::string Port = Conf->ReadValue("bind","port",j);
4014                         std::string transport = Conf->ReadValue("bind","transport",j);
4015                         if (Type == "servers")
4016                         {
4017                                 irc::portparser portrange(Port, false);
4018                                 int portno = -1;
4019                                 while ((portno = portrange.GetToken()))
4020                                 {
4021                                         ServerInstance->Log(DEBUG,"m_spanningtree: Binding server port %s:%d", IP.c_str(), portno);
4022                                         if (IP == "*")
4023                                                 IP = "";
4024
4025                                         if ((!transport.empty()) && (hooks.find(transport.c_str()) ==  hooks.end()))
4026                                         {
4027                                                 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",
4028                                                                 transport.c_str(), IP.c_str(), Port.c_str());
4029                                                 break;
4030                                         }
4031
4032                                         TreeSocket* listener = new TreeSocket(this, ServerInstance, IP.c_str(), portno, true, 10, transport.empty() ? NULL : hooks[transport.c_str()]);
4033                                         if (listener->GetState() == I_LISTENING)
4034                                         {
4035                                                 ServerInstance->Log(DEFAULT,"m_spanningtree: Binding server port %s:%d successful!", IP.c_str(), portno);
4036                                                 Bindings.push_back(listener);
4037                                         }
4038                                         else
4039                                         {
4040                                                 ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %s:%d",IP.c_str(), portno);
4041                                                 listener->Close();
4042                                                 DELETE(listener);
4043                                         }
4044                                         ServerInstance->Log(DEBUG,"Done with this binding");
4045                                 }
4046                         }
4047                 }
4048         }
4049         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
4050         HideULines = Conf->ReadFlag("options","hideulines",0);
4051         AnnounceTSChange = Conf->ReadFlag("options","announcets",0);
4052         EnableTimeSync = !(Conf->ReadFlag("options","notimesync",0));
4053         LinkBlocks.clear();
4054         ValidIPs.clear();
4055         for (int j =0; j < Conf->Enumerate("link"); j++)
4056         {
4057                 Link L;
4058                 std::string Allow = Conf->ReadValue("link","allowmask",j);
4059                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
4060                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
4061                 L.FailOver = Conf->ReadValue("link","failover",j).c_str();
4062                 L.Port = Conf->ReadInteger("link","port",j,true);
4063                 L.SendPass = Conf->ReadValue("link","sendpass",j);
4064                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
4065                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
4066                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
4067                 L.Timeout = Conf->ReadInteger("link","timeout",j,true);
4068                 L.Hook = Conf->ReadValue("link", "transport", j);
4069
4070                 if ((!L.Hook.empty()) && (hooks.find(L.Hook.c_str()) ==  hooks.end()))
4071                 {
4072                         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.",
4073                                         L.Hook.c_str(), L.Name.c_str());
4074                         continue;
4075
4076                 }
4077
4078                 L.NextConnectTime = time(NULL) + L.AutoConnect;
4079                 /* Bugfix by brain, do not allow people to enter bad configurations */
4080                 if (L.Name != ServerInstance->Config->ServerName)
4081                 {
4082                         if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
4083                         {
4084                                 ValidIPs.push_back(L.IPAddr);
4085
4086                                 if (Allow.length())
4087                                         ValidIPs.push_back(Allow);
4088
4089                                 /* Needs resolving */
4090                                 insp_inaddr binip;
4091                                 if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
4092                                 {
4093                                         try
4094                                         {
4095                                                 SecurityIPResolver* sr = new SecurityIPResolver((Module*)this->Creator, this, ServerInstance, L.IPAddr, L);
4096                                                 ServerInstance->AddResolver(sr);
4097                                         }
4098                                         catch (ModuleException& e)
4099                                         {
4100                                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4101                                         }
4102                                 }
4103
4104                                 LinkBlocks.push_back(L);
4105                                 ServerInstance->Log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
4106                         }
4107                         else
4108                         {
4109                                 if (L.IPAddr == "")
4110                                 {
4111                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
4112                                 }
4113                                 else if (L.RecvPass == "")
4114                                 {
4115                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
4116                                 }
4117                                 else if (L.SendPass == "")
4118                                 {
4119                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
4120                                 }
4121                                 else if (L.Name == "")
4122                                 {
4123                                         ServerInstance->Log(DEFAULT,"Invalid configuration, link tag without a name!");
4124                                 }
4125                                 else if (!L.Port)
4126                                 {
4127                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
4128                                 }
4129                         }
4130                 }
4131                 else
4132                 {
4133                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', link tag has the same server name as the local server!",L.Name.c_str());
4134                 }
4135         }
4136         DELETE(Conf);
4137 }
4138
4139 /** To create a timer which recurs every second, we inherit from InspTimer.
4140  * InspTimer is only one-shot however, so at the end of each Tick() we simply
4141  * insert another of ourselves into the pending queue :)
4142  */
4143 class TimeSyncTimer : public InspTimer
4144 {
4145  private:
4146         InspIRCd *Instance;
4147         ModuleSpanningTree *Module;
4148  public:
4149         TimeSyncTimer(InspIRCd *Instance, ModuleSpanningTree *Mod);
4150         virtual void Tick(time_t TIME);
4151 };
4152
4153 HandshakeTimer::HandshakeTimer(InspIRCd* Inst, TreeSocket* s, Link* l, SpanningTreeUtilities* u) : InspTimer(1, time(NULL)), Instance(Inst), sock(s), lnk(l), Utils(u)
4154 {
4155         thefd = sock->GetFd();
4156 }
4157
4158 void HandshakeTimer::Tick(time_t TIME)
4159 {
4160         if (Instance->SE->GetRef(thefd) == sock)
4161         {
4162                 if (sock->GetHook() && InspSocketHSCompleteRequest(sock, (Module*)Utils->Creator, sock->GetHook()).Send())
4163                 {
4164                         Instance->Log(DEBUG,"Handshake timer activated, sending SERVER and/or CAPAB");
4165                         InspSocketAttachCertRequest(sock, (Module*)Utils->Creator, sock->GetHook()).Send();
4166                         sock->SendCapabilities();
4167                         if (sock->GetLinkState() == CONNECTING)
4168                         {
4169                                 sock->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+lnk->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
4170                         }
4171                 }
4172                 else
4173                 {
4174                         Instance->Timers->AddTimer(new HandshakeTimer(Instance, sock, lnk, Utils));
4175                 }
4176         }
4177 }
4178
4179 class ModuleSpanningTree : public Module
4180 {
4181         int line;
4182         int NumServers;
4183         unsigned int max_local;
4184         unsigned int max_global;
4185         cmd_rconnect* command_rconnect;
4186         SpanningTreeUtilities* Utils;
4187
4188  public:
4189         TimeSyncTimer *SyncTimer;
4190
4191         ModuleSpanningTree(InspIRCd* Me)
4192                 : Module::Module(Me), max_local(0), max_global(0)
4193         {
4194                 ServerInstance->UseInterface("InspSocketHook");
4195
4196                 Utils = new SpanningTreeUtilities(Me, this);
4197
4198                 command_rconnect = new cmd_rconnect(ServerInstance, this, Utils);
4199                 ServerInstance->AddCommand(command_rconnect);
4200
4201                 if (Utils->EnableTimeSync)
4202                 {
4203                         SyncTimer = new TimeSyncTimer(ServerInstance, this);
4204                         ServerInstance->Timers->AddTimer(SyncTimer);
4205                 }
4206                 else
4207                         SyncTimer = NULL;
4208         }
4209
4210         void ShowLinks(TreeServer* Current, userrec* user, int hops)
4211         {
4212                 std::string Parent = Utils->TreeRoot->GetName();
4213                 if (Current->GetParent())
4214                 {
4215                         Parent = Current->GetParent()->GetName();
4216                 }
4217                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
4218                 {
4219                         if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
4220                         {
4221                                 if (*user->oper)
4222                                 {
4223                                          ShowLinks(Current->GetChild(q),user,hops+1);
4224                                 }
4225                         }
4226                         else
4227                         {
4228                                 ShowLinks(Current->GetChild(q),user,hops+1);
4229                         }
4230                 }
4231                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
4232                 if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetName().c_str())) && (!*user->oper))
4233                         return;
4234                 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());
4235         }
4236
4237         int CountLocalServs()
4238         {
4239                 return Utils->TreeRoot->ChildCount();
4240         }
4241
4242         int CountServs()
4243         {
4244                 return Utils->serverlist.size();
4245         }
4246
4247         void HandleLinks(const char** parameters, int pcnt, userrec* user)
4248         {
4249                 ShowLinks(Utils->TreeRoot,user,0);
4250                 user->WriteServ("365 %s * :End of /LINKS list.",user->nick);
4251                 return;
4252         }
4253
4254         void HandleLusers(const char** parameters, int pcnt, userrec* user)
4255         {
4256                 unsigned int n_users = ServerInstance->UserCount();
4257
4258                 /* Only update these when someone wants to see them, more efficient */
4259                 if ((unsigned int)ServerInstance->LocalUserCount() > max_local)
4260                         max_local = ServerInstance->LocalUserCount();
4261                 if (n_users > max_global)
4262                         max_global = n_users;
4263
4264                 unsigned int ulined_count = 0;
4265                 unsigned int ulined_local_count = 0;
4266
4267                 /* If ulined are hidden and we're not an oper, count the number of ulined servers hidden,
4268                  * locally and globally (locally means directly connected to us)
4269                  */
4270                 if ((Utils->HideULines) && (!*user->oper))
4271                 {
4272                         for (server_hash::iterator q = Utils->serverlist.begin(); q != Utils->serverlist.end(); q++)
4273                         {
4274                                 if (ServerInstance->ULine(q->second->GetName().c_str()))
4275                                 {
4276                                         ulined_count++;
4277                                         if (q->second->GetParent() == Utils->TreeRoot)
4278                                                 ulined_local_count++;
4279                                 }
4280                         }
4281                 }
4282
4283                 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());
4284                 if (ServerInstance->OperCount())
4285                         user->WriteServ("252 %s %d :operator(s) online",user->nick,ServerInstance->OperCount());
4286                 if (ServerInstance->UnregisteredUserCount())
4287                         user->WriteServ("253 %s %d :unknown connections",user->nick,ServerInstance->UnregisteredUserCount());
4288                 if (ServerInstance->ChannelCount())
4289                         user->WriteServ("254 %s %d :channels formed",user->nick,ServerInstance->ChannelCount());
4290                 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());
4291                 user->WriteServ("265 %s :Current Local Users: %d  Max: %d",user->nick,ServerInstance->LocalUserCount(),max_local);
4292                 user->WriteServ("266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
4293                 return;
4294         }
4295
4296         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
4297
4298         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
4299         {
4300                 if (line < 128)
4301                 {
4302                         for (int t = 0; t < depth; t++)
4303                         {
4304                                 matrix[line][t] = ' ';
4305                         }
4306
4307                         // For Aligning, we need to work out exactly how deep this thing is, and produce
4308                         // a 'Spacer' String to compensate.
4309                         char spacer[40];
4310
4311                         memset(spacer,' ',40);
4312                         if ((40 - Current->GetName().length() - depth) > 1) {
4313                                 spacer[40 - Current->GetName().length() - depth] = '\0';
4314                         }
4315                         else
4316                         {
4317                                 spacer[5] = '\0';
4318                         }
4319
4320                         float percent;
4321                         char text[80];
4322                         if (ServerInstance->clientlist.size() == 0) {
4323                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
4324                                 percent = 0;
4325                         }
4326                         else
4327                         {
4328                                 percent = ((float)Current->GetUserCount() / (float)ServerInstance->clientlist.size()) * 100;
4329                         }
4330                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
4331                         totusers += Current->GetUserCount();
4332                         totservers++;
4333                         strlcpy(&matrix[line][depth],text,80);
4334                         line++;
4335                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
4336                         {
4337                                 if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
4338                                 {
4339                                         if (*user->oper)
4340                                         {
4341                                                 ShowMap(Current->GetChild(q),user,(Utils->FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
4342                                         }
4343                                 }
4344                                 else
4345                                 {
4346                                         ShowMap(Current->GetChild(q),user,(Utils->FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
4347                                 }
4348                         }
4349                 }
4350         }
4351
4352         int HandleMotd(const char** parameters, int pcnt, userrec* user)
4353         {
4354                 if (pcnt > 0)
4355                 {
4356                         /* Remote MOTD, the server is within the 1st parameter */
4357                         std::deque<std::string> params;
4358                         params.push_back(parameters[0]);
4359
4360                         /* Send it out remotely, generate no reply yet */
4361                         TreeServer* s = Utils->FindServerMask(parameters[0]);
4362                         if (s)
4363                         {
4364                                 Utils->DoOneToOne(user->nick, "MOTD", params, s->GetName());
4365                         }
4366                         else
4367                         {
4368                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4369                         }
4370                         return 1;
4371                 }
4372                 return 0;
4373         }
4374
4375         int HandleAdmin(const char** parameters, int pcnt, userrec* user)
4376         {
4377                 if (pcnt > 0)
4378                 {
4379                         /* Remote ADMIN, the server is within the 1st parameter */
4380                         std::deque<std::string> params;
4381                         params.push_back(parameters[0]);
4382
4383                         /* Send it out remotely, generate no reply yet */
4384                         TreeServer* s = Utils->FindServerMask(parameters[0]);
4385                         if (s)
4386                         {
4387                                 Utils->DoOneToOne(user->nick, "ADMIN", params, s->GetName());
4388                         }
4389                         else
4390                         {
4391                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4392                         }
4393                         return 1;
4394                 }
4395                 return 0;
4396         }
4397
4398         int HandleStats(const char** parameters, int pcnt, userrec* user)
4399         {
4400                 if (pcnt > 1)
4401                 {
4402                         /* Remote STATS, the server is within the 2nd parameter */
4403                         std::deque<std::string> params;
4404                         params.push_back(parameters[0]);
4405                         params.push_back(parameters[1]);
4406                         /* Send it out remotely, generate no reply yet */
4407                         TreeServer* s = Utils->FindServerMask(parameters[1]);
4408                         if (s)
4409                         {
4410                                 params[1] = s->GetName();
4411                                 Utils->DoOneToOne(user->nick, "STATS", params, s->GetName());
4412                         }
4413                         else
4414                         {
4415                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4416                         }
4417                         return 1;
4418                 }
4419                 return 0;
4420         }
4421
4422         // Ok, prepare to be confused.
4423         // After much mulling over how to approach this, it struck me that
4424         // the 'usual' way of doing a /MAP isnt the best way. Instead of
4425         // keeping track of a ton of ascii characters, and line by line
4426         // under recursion working out where to place them using multiplications
4427         // and divisons, we instead render the map onto a backplane of characters
4428         // (a character matrix), then draw the branches as a series of "L" shapes
4429         // from the nodes. This is not only friendlier on CPU it uses less stack.
4430
4431         void HandleMap(const char** parameters, int pcnt, userrec* user)
4432         {
4433                 // This array represents a virtual screen which we will
4434                 // "scratch" draw to, as the console device of an irc
4435                 // client does not provide for a proper terminal.
4436                 float totusers = 0;
4437                 float totservers = 0;
4438                 char matrix[128][80];
4439                 for (unsigned int t = 0; t < 128; t++)
4440                 {
4441                         matrix[t][0] = '\0';
4442                 }
4443                 line = 0;
4444                 // The only recursive bit is called here.
4445                 ShowMap(Utils->TreeRoot,user,0,matrix,totusers,totservers);
4446                 // Process each line one by one. The algorithm has a limit of
4447                 // 128 servers (which is far more than a spanning tree should have
4448                 // anyway, so we're ok). This limit can be raised simply by making
4449                 // the character matrix deeper, 128 rows taking 10k of memory.
4450                 for (int l = 1; l < line; l++)
4451                 {
4452                         // scan across the line looking for the start of the
4453                         // servername (the recursive part of the algorithm has placed
4454                         // the servers at indented positions depending on what they
4455                         // are related to)
4456                         int first_nonspace = 0;
4457                         while (matrix[l][first_nonspace] == ' ')
4458                         {
4459                                 first_nonspace++;
4460                         }
4461                         first_nonspace--;
4462                         // Draw the `- (corner) section: this may be overwritten by
4463                         // another L shape passing along the same vertical pane, becoming
4464                         // a |- (branch) section instead.
4465                         matrix[l][first_nonspace] = '-';
4466                         matrix[l][first_nonspace-1] = '`';
4467                         int l2 = l - 1;
4468                         // Draw upwards until we hit the parent server, causing possibly
4469                         // other corners (`-) to become branches (|-)
4470                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
4471                         {
4472                                 matrix[l2][first_nonspace-1] = '|';
4473                                 l2--;
4474                         }
4475                 }
4476                 // dump the whole lot to the user. This is the easy bit, honest.
4477                 for (int t = 0; t < line; t++)
4478                 {
4479                         user->WriteServ("006 %s :%s",user->nick,&matrix[t][0]);
4480                 }
4481                 float avg_users = totusers / totservers;
4482                 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);
4483         user->WriteServ("007 %s :End of /MAP",user->nick);
4484                 return;
4485         }
4486
4487         int HandleSquit(const char** parameters, int pcnt, userrec* user)
4488         {
4489                 TreeServer* s = Utils->FindServerMask(parameters[0]);
4490                 if (s)
4491                 {
4492                         if (s == Utils->TreeRoot)
4493                         {
4494                                 user->WriteServ("NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
4495                                 return 1;
4496                         }
4497                         TreeSocket* sock = s->GetSocket();
4498                         if (sock)
4499                         {
4500                                 ServerInstance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
4501                                 ServerInstance->SNO->WriteToSnoMask('l',"SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
4502                                 sock->Squit(s,std::string("Server quit by ") + user->GetFullRealHost());
4503                                 ServerInstance->SE->DelFd(sock);
4504                                 sock->Close();
4505                                 delete sock;
4506                         }
4507                         else
4508                         {
4509                                 /* route it */
4510                                 std::deque<std::string> params;
4511                                 params.push_back(parameters[0]);
4512                                 params.push_back(std::string(":Server quit by ") + user->GetFullRealHost());
4513                                 Utils->DoOneToOne(user->nick, "RSQUIT", params, parameters[0]);
4514                         }
4515                 }
4516                 else
4517                 {
4518                          user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
4519                 }
4520                 return 1;
4521         }
4522
4523         int HandleTime(const char** parameters, int pcnt, userrec* user)
4524         {
4525                 if ((IS_LOCAL(user)) && (pcnt))
4526                 {
4527                         TreeServer* found = Utils->FindServerMask(parameters[0]);
4528                         if (found)
4529                         {
4530                                 // we dont' override for local server
4531                                 if (found == Utils->TreeRoot)
4532                                         return 0;
4533
4534                                 std::deque<std::string> params;
4535                                 params.push_back(found->GetName());
4536                                 params.push_back(user->nick);
4537                                 Utils->DoOneToOne(ServerInstance->Config->ServerName,"TIME",params,found->GetName());
4538                         }
4539                         else
4540                         {
4541                                 user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4542                         }
4543                 }
4544                 return 1;
4545         }
4546
4547         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
4548         {
4549                 if ((IS_LOCAL(user)) && (pcnt > 1))
4550                 {
4551                         userrec* remote = ServerInstance->FindNick(parameters[1]);
4552                         if ((remote) && (remote->GetFd() < 0))
4553                         {
4554                                 std::deque<std::string> params;
4555                                 params.push_back(parameters[1]);
4556                                 Utils->DoOneToOne(user->nick,"IDLE",params,remote->server);
4557                                 return 1;
4558                         }
4559                         else if (!remote)
4560                         {
4561                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[1]);
4562                                 user->WriteServ("318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
4563                                 return 1;
4564                         }
4565                 }
4566                 return 0;
4567         }
4568
4569         void DoPingChecks(time_t curtime)
4570         {
4571                 for (unsigned int j = 0; j < Utils->TreeRoot->ChildCount(); j++)
4572                 {
4573                         TreeServer* serv = Utils->TreeRoot->GetChild(j);
4574                         TreeSocket* sock = serv->GetSocket();
4575                         if (sock)
4576                         {
4577                                 if (curtime >= serv->NextPingTime())
4578                                 {
4579                                         if (serv->AnsweredLastPing())
4580                                         {
4581                                                 sock->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" PING "+serv->GetName());
4582                                                 serv->SetNextPingTime(curtime + 60);
4583                                         }
4584                                         else
4585                                         {
4586                                                 // they didnt answer, boot them
4587                                                 ServerInstance->SNO->WriteToSnoMask('l',"Server \002%s\002 pinged out",serv->GetName().c_str());
4588                                                 sock->Squit(serv,"Ping timeout");
4589                                                 ServerInstance->SE->DelFd(sock);
4590                                                 sock->Close();
4591                                                 delete sock;
4592                                                 return;
4593                                         }
4594                                 }
4595                         }
4596                 }
4597         }
4598
4599         void ConnectServer(Link* x)
4600         {
4601                 insp_inaddr binip;
4602
4603                 /* Do we already have an IP? If so, no need to resolve it. */
4604                 if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
4605                 {
4606                         /* Gave a hook, but it wasnt one we know */
4607                         if ((!x->Hook.empty()) && (Utils->hooks.find(x->Hook.c_str()) == Utils->hooks.end()))
4608                                 return;
4609
4610                         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()]);
4611                         if (newsocket->GetFd() > -1)
4612                         {
4613                                 /* Handled automatically on success */
4614                         }
4615                         else
4616                         {
4617                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
4618                                 delete newsocket;
4619                                 Utils->DoFailOver(x);
4620                         }
4621                 }
4622                 else
4623                 {
4624                         try
4625                         {
4626                                 ServernameResolver* snr = new ServernameResolver((Module*)this, Utils, ServerInstance,x->IPAddr, *x);
4627                                 ServerInstance->AddResolver(snr);
4628                         }
4629                         catch (ModuleException& e)
4630                         {
4631                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4632                                 Utils->DoFailOver(x);
4633                         }
4634                 }
4635         }
4636
4637         void AutoConnectServers(time_t curtime)
4638         {
4639                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
4640                 {
4641                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
4642                         {
4643                                 ServerInstance->Log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
4644                                 x->NextConnectTime = curtime + x->AutoConnect;
4645                                 TreeServer* CheckDupe = Utils->FindServer(x->Name.c_str());
4646                                 if (x->FailOver.length())
4647                                 {
4648                                         TreeServer* CheckFailOver = Utils->FindServer(x->FailOver.c_str());
4649                                         if (CheckFailOver)
4650                                         {
4651                                                 /* The failover for this server is currently a member of the network.
4652                                                  * The failover probably succeeded, where the main link did not.
4653                                                  * Don't try the main link until the failover is gone again.
4654                                                  */
4655                                                 continue;
4656                                         }
4657                                 }
4658                                 if (!CheckDupe)
4659                                 {
4660                                         // an autoconnected server is not connected. Check if its time to connect it
4661                                         ServerInstance->SNO->WriteToSnoMask('l',"AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
4662                                         this->ConnectServer(&(*x));
4663                                 }
4664                         }
4665                 }
4666         }
4667
4668         int HandleVersion(const char** parameters, int pcnt, userrec* user)
4669         {
4670                 // we've already checked if pcnt > 0, so this is safe
4671                 TreeServer* found = Utils->FindServerMask(parameters[0]);
4672                 if (found)
4673                 {
4674                         std::string Version = found->GetVersion();
4675                         user->WriteServ("351 %s :%s",user->nick,Version.c_str());
4676                         if (found == Utils->TreeRoot)
4677                         {
4678                                 std::stringstream out(ServerInstance->Config->data005);
4679                                 std::string token = "";
4680                                 std::string line5 = "";
4681                                 int token_counter = 0;
4682
4683                                 while (!out.eof())
4684                                 {
4685                                         out >> token;
4686                                         line5 = line5 + token + " ";
4687                                         token_counter++;
4688
4689                                         if ((token_counter >= 13) || (out.eof() == true))
4690                                         {
4691                                                 user->WriteServ("005 %s %s:are supported by this server",user->nick,line5.c_str());
4692                                                 line5 = "";
4693                                                 token_counter = 0;
4694                                         }
4695                                 }
4696                         }
4697                 }
4698                 else
4699                 {
4700                         user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4701                 }
4702                 return 1;
4703         }
4704
4705         int HandleConnect(const char** parameters, int pcnt, userrec* user)
4706         {
4707                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
4708                 {
4709                         if (ServerInstance->MatchText(x->Name.c_str(),parameters[0]))
4710                         {
4711                                 TreeServer* CheckDupe = Utils->FindServer(x->Name.c_str());
4712                                 if (!CheckDupe)
4713                                 {
4714                                         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);
4715                                         ConnectServer(&(*x));
4716                                         return 1;
4717                                 }
4718                                 else
4719                                 {
4720                                         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());
4721                                         return 1;
4722                                 }
4723                         }
4724                 }
4725                 user->WriteServ("NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
4726                 return 1;
4727         }
4728
4729         void BroadcastTimeSync()
4730         {
4731                 std::deque<std::string> params;
4732                 params.push_back(ConvToStr(ServerInstance->Time(true)));
4733                 Utils->DoOneToMany(Utils->TreeRoot->GetName(), "TIMESET", params);
4734         }
4735
4736         virtual int OnStats(char statschar, userrec* user, string_list &results)
4737         {
4738                 if ((statschar == 'c') || (statschar == 'n'))
4739                 {
4740                         for (unsigned int i = 0; i < Utils->LinkBlocks.size(); i++)
4741                         {
4742                                 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');
4743                                 if (statschar == 'c')
4744                                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 244 "+user->nick+" H * * "+Utils->LinkBlocks[i].Name.c_str());
4745                         }
4746                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 219 "+user->nick+" "+statschar+" :End of /STATS report");
4747                         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);
4748                         return 1;
4749                 }
4750                 return 0;
4751         }
4752
4753         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
4754         {
4755                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
4756                 if (!validated)
4757                         return 0;
4758
4759                 if (command == "CONNECT")
4760                 {
4761                         return this->HandleConnect(parameters,pcnt,user);
4762                 }
4763                 else if (command == "STATS")
4764                 {
4765                         return this->HandleStats(parameters,pcnt,user);
4766                 }
4767                 else if (command == "MOTD")
4768                 {
4769                         return this->HandleMotd(parameters,pcnt,user);
4770                 }
4771                 else if (command == "ADMIN")
4772                 {
4773                         return this->HandleAdmin(parameters,pcnt,user);
4774                 }
4775                 else if (command == "SQUIT")
4776                 {
4777                         return this->HandleSquit(parameters,pcnt,user);
4778                 }
4779                 else if (command == "MAP")
4780                 {
4781                         this->HandleMap(parameters,pcnt,user);
4782                         return 1;
4783                 }
4784                 else if ((command == "TIME") && (pcnt > 0))
4785                 {
4786                         return this->HandleTime(parameters,pcnt,user);
4787                 }
4788                 else if (command == "LUSERS")
4789                 {
4790                         this->HandleLusers(parameters,pcnt,user);
4791                         return 1;
4792                 }
4793                 else if (command == "LINKS")
4794                 {
4795                         this->HandleLinks(parameters,pcnt,user);
4796                         return 1;
4797                 }
4798                 else if (command == "WHOIS")
4799                 {
4800                         if (pcnt > 1)
4801                         {
4802                                 // remote whois
4803                                 return this->HandleRemoteWhois(parameters,pcnt,user);
4804                         }
4805                 }
4806                 else if ((command == "VERSION") && (pcnt > 0))
4807                 {
4808                         this->HandleVersion(parameters,pcnt,user);
4809                         return 1;
4810                 }
4811
4812                 return 0;
4813         }
4814
4815         virtual void OnPostCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, CmdResult result, const std::string &original_line)
4816         {
4817                 if ((result == CMD_SUCCESS) && (ServerInstance->IsValidModuleCommand(command, pcnt, user)))
4818                 {
4819                         // this bit of code cleverly routes all module commands
4820                         // to all remote severs *automatically* so that modules
4821                         // can just handle commands locally, without having
4822                         // to have any special provision in place for remote
4823                         // commands and linking protocols.
4824                         std::deque<std::string> params;
4825                         params.clear();
4826                         for (int j = 0; j < pcnt; j++)
4827                         {
4828                                 if (strchr(parameters[j],' '))
4829                                 {
4830                                         params.push_back(":" + std::string(parameters[j]));
4831                                 }
4832                                 else
4833                                 {
4834                                         params.push_back(std::string(parameters[j]));
4835                                 }
4836                         }
4837                         ServerInstance->Log(DEBUG,"Globally route '%s'",command.c_str());
4838                         Utils->DoOneToMany(user->nick,command,params);
4839                 }
4840         }
4841
4842         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
4843         {
4844                 TreeServer* s = Utils->FindServer(servername);
4845                 if (s)
4846                 {
4847                         description = s->GetDesc();
4848                 }
4849         }
4850
4851         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
4852         {
4853                 if (IS_LOCAL(source))
4854                 {
4855                         std::deque<std::string> params;
4856                         params.push_back(dest->nick);
4857                         params.push_back(channel->name);
4858                         Utils->DoOneToMany(source->nick,"INVITE",params);
4859                 }
4860         }
4861
4862         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
4863         {
4864                 std::deque<std::string> params;
4865                 params.push_back(chan->name);
4866                 params.push_back(":"+topic);
4867                 Utils->DoOneToMany(user->nick,"TOPIC",params);
4868         }
4869
4870         virtual void OnWallops(userrec* user, const std::string &text)
4871         {
4872                 if (IS_LOCAL(user))
4873                 {
4874                         std::deque<std::string> params;
4875                         params.push_back(":"+text);
4876                         Utils->DoOneToMany(user->nick,"WALLOPS",params);
4877                 }
4878         }
4879
4880         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status, const CUList &exempt_list)
4881         {
4882                 if (target_type == TYPE_USER)
4883                 {
4884                         userrec* d = (userrec*)dest;
4885                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4886                         {
4887                                 std::deque<std::string> params;
4888                                 params.clear();
4889                                 params.push_back(d->nick);
4890                                 params.push_back(":"+text);
4891                                 Utils->DoOneToOne(user->nick,"NOTICE",params,d->server);
4892                         }
4893                 }
4894                 else if (target_type == TYPE_CHANNEL)
4895                 {
4896                         if (IS_LOCAL(user))
4897                         {
4898                                 chanrec *c = (chanrec*)dest;
4899                                 if (c)
4900                                 {
4901                                         std::string cname = c->name;
4902                                         if (status)
4903                                                 cname = status + cname;
4904                                         TreeServerList list;
4905                                         Utils->GetListOfServersForChannel(c,list,status,exempt_list);
4906
4907                                         for (TreeServerList::iterator i = list.begin(); i != list.end(); i++)
4908                                         {
4909                                                 TreeSocket* Sock = i->second->GetSocket();
4910                                                 if (Sock)
4911                                                         Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
4912                                         }
4913                                 }
4914                         }
4915                 }
4916                 else if (target_type == TYPE_SERVER)
4917                 {
4918                         if (IS_LOCAL(user))
4919                         {
4920                                 char* target = (char*)dest;
4921                                 std::deque<std::string> par;
4922                                 par.push_back(target);
4923                                 par.push_back(":"+text);
4924                                 Utils->DoOneToMany(user->nick,"NOTICE",par);
4925                         }
4926                 }
4927         }
4928
4929         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status, const CUList &exempt_list)
4930         {
4931                 if (target_type == TYPE_USER)
4932                 {
4933                         // route private messages which are targetted at clients only to the server
4934                         // which needs to receive them
4935                         userrec* d = (userrec*)dest;
4936                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4937                         {
4938                                 std::deque<std::string> params;
4939                                 params.clear();
4940                                 params.push_back(d->nick);
4941                                 params.push_back(":"+text);
4942                                 Utils->DoOneToOne(user->nick,"PRIVMSG",params,d->server);
4943                         }
4944                 }
4945                 else if (target_type == TYPE_CHANNEL)
4946                 {
4947                         if (IS_LOCAL(user))
4948                         {
4949                                 chanrec *c = (chanrec*)dest;
4950                                 if (c)
4951                                 {
4952                                         std::string cname = c->name;
4953                                         if (status)
4954                                                 cname = status + cname;
4955                                         TreeServerList list;
4956                                         Utils->GetListOfServersForChannel(c,list,status,exempt_list);
4957
4958                                         for (TreeServerList::iterator i = list.begin(); i != list.end(); i++)
4959                                         {
4960                                                 TreeSocket* Sock = i->second->GetSocket();
4961                                                 if (Sock)
4962                                                         Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
4963                                         }
4964                                 }
4965                         }
4966                 }
4967                 else if (target_type == TYPE_SERVER)
4968                 {
4969                         if (IS_LOCAL(user))
4970                         {
4971                                 char* target = (char*)dest;
4972                                 std::deque<std::string> par;
4973                                 par.push_back(target);
4974                                 par.push_back(":"+text);
4975                                 Utils->DoOneToMany(user->nick,"PRIVMSG",par);
4976                         }
4977                 }
4978         }
4979
4980         virtual void OnBackgroundTimer(time_t curtime)
4981         {
4982                 AutoConnectServers(curtime);
4983                 DoPingChecks(curtime);
4984         }
4985
4986         virtual void OnUserJoin(userrec* user, chanrec* channel)
4987         {
4988                 // Only do this for local users
4989                 if (IS_LOCAL(user))
4990                 {
4991                         std::deque<std::string> params;
4992                         params.clear();
4993                         params.push_back(channel->name);
4994                         // set up their permissions and the channel TS with FJOIN.
4995                         // All users are FJOINed now, because a module may specify
4996                         // new joining permissions for the user.
4997                         params.clear();
4998                         params.push_back(channel->name);
4999                         params.push_back(ConvToStr(channel->age));
5000                         params.push_back(std::string(channel->GetAllPrefixChars(user))+","+std::string(user->nick));
5001                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FJOIN",params);
5002                         if (channel->GetUserCounter() == 1)
5003                         {
5004                                 /* First user in, sync the modes for the channel */
5005                                 params.pop_back();
5006                                 /* This is safe, all inspircd servers default to +nt */
5007                                 params.push_back("+nt");
5008                                 Utils->DoOneToMany(ServerInstance->Config->ServerName,"FMODE",params);
5009                         }
5010                 }
5011         }
5012
5013         virtual void OnChangeHost(userrec* user, const std::string &newhost)
5014         {
5015                 // only occurs for local clients
5016                 if (user->registered != REG_ALL)
5017                         return;
5018                 std::deque<std::string> params;
5019                 params.push_back(newhost);
5020                 Utils->DoOneToMany(user->nick,"FHOST",params);
5021         }
5022
5023         virtual void OnChangeName(userrec* user, const std::string &gecos)
5024         {
5025                 // only occurs for local clients
5026                 if (user->registered != REG_ALL)
5027                         return;
5028                 std::deque<std::string> params;
5029                 params.push_back(gecos);
5030                 Utils->DoOneToMany(user->nick,"FNAME",params);
5031         }
5032
5033         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
5034         {
5035                 if (IS_LOCAL(user))
5036                 {
5037                         std::deque<std::string> params;
5038                         params.push_back(channel->name);
5039                         if (partmessage != "")
5040                                 params.push_back(":"+partmessage);
5041                         Utils->DoOneToMany(user->nick,"PART",params);
5042                 }
5043         }
5044
5045         virtual void OnUserConnect(userrec* user)
5046         {
5047                 char agestr[MAXBUF];
5048                 if (IS_LOCAL(user))
5049                 {
5050                         std::deque<std::string> params;
5051                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
5052                         params.push_back(agestr);
5053                         params.push_back(user->nick);
5054                         params.push_back(user->host);
5055                         params.push_back(user->dhost);
5056                         params.push_back(user->ident);
5057                         params.push_back("+"+std::string(user->FormatModes()));
5058                         params.push_back(user->GetIPString());
5059                         params.push_back(":"+std::string(user->fullname));
5060                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"NICK",params);
5061
5062                         // User is Local, change needs to be reflected!
5063                         TreeServer* SourceServer = Utils->FindServer(user->server);
5064                         if (SourceServer)
5065                         {
5066                                 SourceServer->AddUserCount();
5067                         }
5068
5069                 }
5070         }
5071
5072         virtual void OnUserQuit(userrec* user, const std::string &reason)
5073         {
5074                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
5075                 {
5076                         std::deque<std::string> params;
5077                         params.push_back(":"+reason);
5078                         Utils->DoOneToMany(user->nick,"QUIT",params);
5079                 }
5080                 // Regardless, We need to modify the user Counts..
5081                 TreeServer* SourceServer = Utils->FindServer(user->server);
5082                 if (SourceServer)
5083                 {
5084                         SourceServer->DelUserCount();
5085                 }
5086
5087         }
5088
5089         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
5090         {
5091                 if (IS_LOCAL(user))
5092                 {
5093                         std::deque<std::string> params;
5094                         params.push_back(user->nick);
5095                         Utils->DoOneToMany(oldnick,"NICK",params);
5096                 }
5097         }
5098
5099         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
5100         {
5101                 if ((source) && (IS_LOCAL(source)))
5102                 {
5103                         std::deque<std::string> params;
5104                         params.push_back(chan->name);
5105                         params.push_back(user->nick);
5106                         params.push_back(":"+reason);
5107                         Utils->DoOneToMany(source->nick,"KICK",params);
5108                 }
5109                 else if (!source)
5110                 {
5111                         std::deque<std::string> params;
5112                         params.push_back(chan->name);
5113                         params.push_back(user->nick);
5114                         params.push_back(":"+reason);
5115                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"KICK",params);
5116                 }
5117         }
5118
5119         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
5120         {
5121                 std::deque<std::string> params;
5122                 params.push_back(dest->nick);
5123                 params.push_back(":"+reason);
5124                 Utils->DoOneToMany(source->nick,"KILL",params);
5125         }
5126
5127         virtual void OnRehash(const std::string &parameter)
5128         {
5129                 if (parameter != "")
5130                 {
5131                         std::deque<std::string> params;
5132                         params.push_back(parameter);
5133                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"REHASH",params);
5134                         // check for self
5135                         if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameter))
5136                         {
5137                                 ServerInstance->WriteOpers("*** Remote rehash initiated from server \002%s\002",ServerInstance->Config->ServerName);
5138                                 ServerInstance->RehashServer();
5139                         }
5140                 }
5141                 Utils->ReadConfiguration(false);
5142         }
5143
5144         // note: the protocol does not allow direct umode +o except
5145         // via NICK with 8 params. sending OPERTYPE infers +o modechange
5146         // locally.
5147         virtual void OnOper(userrec* user, const std::string &opertype)
5148         {
5149                 if (IS_LOCAL(user))
5150                 {
5151                         std::deque<std::string> params;
5152                         params.push_back(opertype);
5153                         Utils->DoOneToMany(user->nick,"OPERTYPE",params);
5154                 }
5155         }
5156
5157         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
5158         {
5159                 if (!source)
5160                 {
5161                         /* Server-set lines */
5162                         char data[MAXBUF];
5163                         snprintf(data,MAXBUF,"%c %s %s %lu %lu :%s", linetype, host.c_str(), ServerInstance->Config->ServerName, (unsigned long)ServerInstance->Time(false),
5164                                         (unsigned long)duration, reason.c_str());
5165                         std::deque<std::string> params;
5166                         params.push_back(data);
5167                         Utils->DoOneToMany(ServerInstance->Config->ServerName, "ADDLINE", params);
5168                 }
5169                 else
5170                 {
5171                         if (IS_LOCAL(source))
5172                         {
5173                                 char type[8];
5174                                 snprintf(type,8,"%cLINE",linetype);
5175                                 std::string stype = type;
5176                                 if (adding)
5177                                 {
5178                                         char sduration[MAXBUF];
5179                                         snprintf(sduration,MAXBUF,"%ld",duration);
5180                                         std::deque<std::string> params;
5181                                         params.push_back(host);
5182                                         params.push_back(sduration);
5183                                         params.push_back(":"+reason);
5184                                         Utils->DoOneToMany(source->nick,stype,params);
5185                                 }
5186                                 else
5187                                 {
5188                                         std::deque<std::string> params;
5189                                         params.push_back(host);
5190                                         Utils->DoOneToMany(source->nick,stype,params);
5191                                 }
5192                         }
5193                 }
5194         }
5195
5196         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
5197         {
5198                 OnLine(source,hostmask,true,'G',duration,reason);
5199         }
5200
5201         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
5202         {
5203                 OnLine(source,ipmask,true,'Z',duration,reason);
5204         }
5205
5206         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
5207         {
5208                 OnLine(source,nickmask,true,'Q',duration,reason);
5209         }
5210
5211         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
5212         {
5213                 OnLine(source,hostmask,true,'E',duration,reason);
5214         }
5215
5216         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
5217         {
5218                 OnLine(source,hostmask,false,'G',0,"");
5219         }
5220
5221         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
5222         {
5223                 OnLine(source,ipmask,false,'Z',0,"");
5224         }
5225
5226         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
5227         {
5228                 OnLine(source,nickmask,false,'Q',0,"");
5229         }
5230
5231         virtual void OnDelELine(userrec* source, const std::string &hostmask)
5232         {
5233                 OnLine(source,hostmask,false,'E',0,"");
5234         }
5235
5236         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
5237         {
5238                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
5239                 {
5240                         if (target_type == TYPE_USER)
5241                         {
5242                                 userrec* u = (userrec*)dest;
5243                                 std::deque<std::string> params;
5244                                 params.push_back(u->nick);
5245                                 params.push_back(text);
5246                                 Utils->DoOneToMany(user->nick,"MODE",params);
5247                         }
5248                         else
5249                         {
5250                                 chanrec* c = (chanrec*)dest;
5251                                 std::deque<std::string> params;
5252                                 params.push_back(c->name);
5253                                 params.push_back(text);
5254                                 Utils->DoOneToMany(user->nick,"MODE",params);
5255                         }
5256                 }
5257         }
5258
5259         virtual void OnSetAway(userrec* user)
5260         {
5261                 if (IS_LOCAL(user))
5262                 {
5263                         std::deque<std::string> params;
5264                         params.push_back(":"+std::string(user->awaymsg));
5265                         Utils->DoOneToMany(user->nick,"AWAY",params);
5266                 }
5267         }
5268
5269         virtual void OnCancelAway(userrec* user)
5270         {
5271                 if (IS_LOCAL(user))
5272                 {
5273                         std::deque<std::string> params;
5274                         params.clear();
5275                         Utils->DoOneToMany(user->nick,"AWAY",params);
5276                 }
5277         }
5278
5279         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
5280         {
5281                 TreeSocket* s = (TreeSocket*)opaque;
5282                 if (target)
5283                 {
5284                         if (target_type == TYPE_USER)
5285                         {
5286                                 userrec* u = (userrec*)target;
5287                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
5288                         }
5289                         else
5290                         {
5291                                 chanrec* c = (chanrec*)target;
5292                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
5293                         }
5294                 }
5295         }
5296
5297         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
5298         {
5299                 TreeSocket* s = (TreeSocket*)opaque;
5300                 if (target)
5301                 {
5302                         if (target_type == TYPE_USER)
5303                         {
5304                                 userrec* u = (userrec*)target;
5305                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+u->nick+" "+extname+" :"+extdata);
5306                         }
5307                         else if (target_type == TYPE_CHANNEL)
5308                         {
5309                                 chanrec* c = (chanrec*)target;
5310                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+c->name+" "+extname+" :"+extdata);
5311                         }
5312                 }
5313                 if (target_type == TYPE_OTHER)
5314                 {
5315                         s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA * "+extname+" :"+extdata);
5316                 }
5317         }
5318
5319         virtual void OnEvent(Event* event)
5320         {
5321                 std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
5322
5323                 if (event->GetEventID() == "send_metadata")
5324                 {
5325                         if (params->size() < 3)
5326                                 return;
5327                         (*params)[2] = ":" + (*params)[2];
5328                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"METADATA",*params);
5329                 }
5330                 else if (event->GetEventID() == "send_topic")
5331                 {
5332                         if (params->size() < 2)
5333                                 return;
5334                         (*params)[1] = ":" + (*params)[1];
5335                         params->insert(params->begin() + 1,ServerInstance->Config->ServerName);
5336                         params->insert(params->begin() + 1,ConvToStr(ServerInstance->Time(true)));
5337                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FTOPIC",*params);
5338                 }
5339                 else if (event->GetEventID() == "send_mode")
5340                 {
5341                         if (params->size() < 2)
5342                                 return;
5343                         // Insert the TS value of the object, either userrec or chanrec
5344                         time_t ourTS = 0;
5345                         userrec* a = ServerInstance->FindNick((*params)[0]);
5346                         if (a)
5347                         {
5348                                 ourTS = a->age;
5349                         }
5350                         else
5351                         {
5352                                 chanrec* a = ServerInstance->FindChan((*params)[0]);
5353                                 if (a)
5354                                 {
5355                                         ourTS = a->age;
5356                                 }
5357                         }
5358                         params->insert(params->begin() + 1,ConvToStr(ourTS));
5359                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FMODE",*params);
5360                 }
5361                 else if (event->GetEventID() == "send_mode_explicit")
5362                 {
5363                         if (params->size() < 2)
5364                                 return;
5365                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"MODE",*params);
5366                 }
5367                 else if (event->GetEventID() == "send_opers")
5368                 {
5369                         if (params->size() < 1)
5370                                 return;
5371                         (*params)[0] = ":" + (*params)[0];
5372                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"OPERNOTICE",*params);
5373                 }
5374                 else if (event->GetEventID() == "send_modeset")
5375                 {
5376                         if (params->size() < 2)
5377                                 return;
5378                         (*params)[1] = ":" + (*params)[1];
5379                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"MODENOTICE",*params);
5380                 }
5381                 else if (event->GetEventID() == "send_snoset")
5382                 {
5383                         if (params->size() < 2)
5384                                 return;
5385                         (*params)[1] = ":" + (*params)[1];
5386                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"SNONOTICE",*params);
5387                 }
5388                 else if (event->GetEventID() == "send_push")
5389                 {
5390                         if (params->size() < 2)
5391                                 return;
5392
5393                         userrec *a = ServerInstance->FindNick((*params)[0]);
5394
5395                         if (!a)
5396                                 return;
5397
5398                         (*params)[1] = ":" + (*params)[1];
5399                         Utils->DoOneToOne(ServerInstance->Config->ServerName, "PUSH", *params, a->server);
5400                 }
5401         }
5402
5403         virtual ~ModuleSpanningTree()
5404         {
5405                 ServerInstance->Log(DEBUG,"Performing unload of spanningtree!");
5406                 /* This will also free the listeners */
5407                 delete Utils;
5408                 if (SyncTimer)
5409                         ServerInstance->Timers->DelTimer(SyncTimer);
5410
5411                 ServerInstance->DoneWithInterface("InspSocketHook");
5412         }
5413
5414         virtual Version GetVersion()
5415         {
5416                 return Version(1,1,0,2,VF_VENDOR,API_VERSION);
5417         }
5418
5419         void Implements(char* List)
5420         {
5421                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
5422                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
5423                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
5424                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
5425                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
5426                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
5427                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = List[I_OnPostCommand] = 1;
5428         }
5429
5430         /* It is IMPORTANT that m_spanningtree is the last module in the chain
5431          * so that any activity it sees is FINAL, e.g. we arent going to send out
5432          * a NICK message before m_cloaking has finished putting the +x on the user,
5433          * etc etc.
5434          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
5435          * the module call queue.
5436          */
5437         Priority Prioritize()
5438         {
5439                 return PRIORITY_LAST;
5440         }
5441 };
5442
5443 TimeSyncTimer::TimeSyncTimer(InspIRCd *Inst, ModuleSpanningTree *Mod) : InspTimer(43200, Inst->Time()), Instance(Inst), Module(Mod)
5444 {
5445 }
5446
5447 void TimeSyncTimer::Tick(time_t TIME)
5448 {
5449         Module->BroadcastTimeSync();
5450         Module->SyncTimer = new TimeSyncTimer(Instance, Module);
5451         Instance->Timers->AddTimer(Module->SyncTimer);
5452 }
5453
5454 void SpanningTreeUtilities::DoFailOver(Link* x)
5455 {
5456         if (x->FailOver.length())
5457         {
5458                 if (x->FailOver == x->Name)
5459                 {
5460                         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());
5461                         return;
5462                 }
5463                 Link* TryThisOne = this->FindLink(x->FailOver.c_str());
5464                 if (TryThisOne)
5465                 {
5466                         ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Trying failover link for \002%s\002: \002%s\002...", x->Name.c_str(), TryThisOne->Name.c_str());
5467                         Creator->ConnectServer(TryThisOne);
5468                 }
5469                 else
5470                 {
5471                         ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Invalid failover server specified for server \002%s\002, will not follow!", x->Name.c_str());
5472                 }
5473         }
5474 }
5475
5476 Link* SpanningTreeUtilities::FindLink(const std::string& name)
5477 {
5478         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
5479         {
5480                 if (ServerInstance->MatchText(x->Name.c_str(), name.c_str()))
5481                 {
5482                         return &(*x);
5483                 }
5484         }
5485         return NULL;
5486 }
5487
5488 class ModuleSpanningTreeFactory : public ModuleFactory
5489 {
5490  public:
5491         ModuleSpanningTreeFactory()
5492         {
5493         }
5494
5495         ~ModuleSpanningTreeFactory()
5496         {
5497         }
5498
5499         virtual Module * CreateModule(InspIRCd* Me)
5500         {
5501                 return new ModuleSpanningTree(Me);
5502         }
5503
5504 };
5505
5506
5507 extern "C" void * init_module( void )
5508 {
5509         return new ModuleSpanningTreeFactory;
5510 }