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
 705         /** When a listening socket gives us a new file descriptor,
 706          * we must associate it with a socket without creating a new
 707          * connection. This constructor is used for this purpose.
 708          */
 709         TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, int newfd, char* ip, Module* HookMod = NULL)
 710                 : InspSocket(SI, newfd, ip), Utils(Util), Hook(HookMod)
 711         {
 712                 this->LinkState = WAIT_AUTH_1;
 713
 714                 Instance->Log(DEBUG, "HOOK = %08x", Hook);
 715
 716                 if (Hook)
 717                 {
 718                         InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
 719                         Instance->Timers->AddTimer(new HandshakeTimer(Instance, this, &(Utils->LinkBlocks[0]), this->Utils));
 720                 }
 721         }
 722
 723         ServerState GetLinkState()
 724         {
 725                 return this->LinkState;
 726         }
 727
 728         Module* GetHook()
 729         {
 730                 return this->Hook;
 731         }
 732
 733         ~TreeSocket()
 734         {
 735                 if (Hook)
 736                         InspSocketUnhookRequest(this, (Module*)Utils->Creator, Hook).Send();
 737         }
 738
 739         /** When an outbound connection finishes connecting, we receive
 740          * this event, and must send our SERVER string to the other
 741          * side. If the other side is happy, as outlined in the server
 742          * to server docs on the inspircd.org site, the other side
 743          * will then send back its own server string.
 744          */
 745         virtual bool OnConnected()
 746         {
 747                 if (this->LinkState == CONNECTING)
 748                 {
 749                         /* we do not need to change state here. */
 750                         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 751                         {
 752                                 if (x->Name == this->myhost)
 753                                 {
 754                                         this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] started.");
 755
 756                                         if (Hook)
 757                                         {
 758                                                 InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
 759                                                 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] using transport \2"+x->Hook+"\2");
 760                                         }
 761                                         else
 762                                                 this->SendCapabilities();
 763
 764                                         /* found who we're supposed to be connecting to, send the neccessary gubbins. */
 765                                         if (Hook)
 766                                                 Instance->Timers->AddTimer(new HandshakeTimer(Instance, this, &(*x), this->Utils));
 767                                         else
 768                                                 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
 769
 770                                         return true;
 771                                 }
 772                         }
 773                 }
 774                 /* There is a (remote) chance that between the /CONNECT and the connection
 775                  * being accepted, some muppet has removed the <link> block and rehashed.
 776                  * If that happens the connection hangs here until it's closed. Unlikely
 777                  * and rather harmless.
 778                  */
 779                 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2 lost link tag(!)");
 780                 return true;
 781         }
 782
 783         virtual void OnError(InspSocketError e)
 784         {
 785                 /* We don't handle this method, because all our
 786                  * dirty work is done in OnClose() (see below)
 787                  * which is still called on error conditions too.
 788                  */
 789                 if (e == I_ERR_CONNECT)
 790                 {
 791                         this->Instance->SNO->WriteToSnoMask('l',"Connection failed: Connection to \002"+myhost+"\002 refused");
 792                         Link* MyLink = Utils->FindLink(myhost);
 793                         if (MyLink)
 794                                 Utils->DoFailOver(MyLink);
 795                 }
 796         }
 797
 798         virtual int OnDisconnect()
 799         {
 800                 /* For the same reason as above, we don't
 801                  * handle OnDisconnect()
 802                  */
 803                 return true;
 804         }
 805
 806         /** Recursively send the server tree with distances as hops.
 807          * This is used during network burst to inform the other server
 808          * (and any of ITS servers too) of what servers we know about.
 809          * If at any point any of these servers already exist on the other
 810          * end, our connection may be terminated. The hopcounts given
 811          * by this function are relative, this doesn't matter so long as
 812          * they are all >1, as all the remote servers re-calculate them
 813          * to be relative too, with themselves as hop 0.
 814          */
 815         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 816         {
 817                 char command[1024];
 818                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 819                 {
 820                         TreeServer* recursive_server = Current->GetChild(q);
 821                         if (recursive_server != s)
 822                         {
 823                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 824                                 this->WriteLine(command);
 825                                 this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
 826                                 /* down to next level */
 827                                 this->SendServers(recursive_server, s, hops+1);
 828                         }
 829                 }
 830         }
 831
 832         std::string MyCapabilities()
 833         {
 834                 std::vector<std::string> modlist;
 835                 std::string capabilities = "";
 836
 837                 for (int i = 0; i <= this->Instance->GetModuleCount(); i++)
 838                 {
 839                         if (this->Instance->modules[i]->GetVersion().Flags & VF_COMMON)
 840                                 modlist.push_back(this->Instance->Config->module_names[i]);
 841                 }
 842                 sort(modlist.begin(),modlist.end());
 843                 for (unsigned int i = 0; i < modlist.size(); i++)
 844                 {
 845                         if (i)
 846                                 capabilities = capabilities + ",";
 847                         capabilities = capabilities + modlist[i];
 848                 }
 849                 return capabilities;
 850         }
 851
 852         void SendCapabilities()
 853         {
 854                 irc::commasepstream modulelist(MyCapabilities());
 855
 856                 this->WriteLine("CAPAB START");
 857
 858                 /* Send module names, split at 509 length */
 859                 std::string item = "*";
 860                 std::string line = "CAPAB MODULES ";
 861                 while ((item = modulelist.GetToken()) != "")
 862                 {
 863                         if (line.length() + item.length() + 1 > 509)
 864                         {
 865                                 this->WriteLine(line);
 866                                 line = "CAPAB MODULES ";
 867                         }
 868
 869                         if (line != "CAPAB MODULES ")
 870                                 line.append(",");
 871
 872                         line.append(item);
 873                 }
 874                 if (line != "CAPAB MODULES ")
 875                         this->WriteLine(line);
 876
 877                 int ip6 = 0;
 878                 int ip6support = 0;
 879 #ifdef IPV6
 880                 ip6 = 1;
 881 #endif
 882 #ifdef SUPPORT_IP6LINKS
 883                 ip6support = 1;
 884 #endif
 885                 this->WriteLine("CAPAB CAPABILITIES :NICKMAX="+ConvToStr(NICKMAX)+" HALFOP="+ConvToStr(this->Instance->Config->AllowHalfop)+" CHANMAX="+ConvToStr(CHANMAX)+" MAXMODES="+ConvToStr(MAXMODES)+" IDENTMAX="+ConvToStr(IDENTMAX)+" MAXQUIT="+ConvToStr(MAXQUIT)+" MAXTOPIC="+ConvToStr(MAXTOPIC)+" MAXKICK="+ConvToStr(MAXKICK)+" MAXGECOS="+ConvToStr(MAXGECOS)+" MAXAWAY="+ConvToStr(MAXAWAY)+" IP6NATIVE="+ConvToStr(ip6)+" IP6SUPPORT="+ConvToStr(ip6support)+" PROTOCOL="+ConvToStr(ProtocolVersion));
 886
 887                 this->WriteLine("CAPAB END");
 888         }
 889
 890         /* Check a comma seperated list for an item */
 891         bool HasItem(const std::string &list, const std::string &item)
 892         {
 893                 irc::commasepstream seplist(list);
 894
 895                 std::string item2 = "*";
 896                 while ((item2 = seplist.GetToken()) != "")
 897                 {
 898                         if (item2 == item)
 899                                 return true;
 900                 }
 901
 902                 return false;
 903         }
 904
 905         /* Isolate and return the elements that are different between two comma seperated lists */
 906         std::string ListDifference(const std::string &one, const std::string &two)
 907         {
 908                 irc::commasepstream list_one(one);
 909                 std::string item = "*";
 910                 std::string result = "";
 911                 while ((item = list_one.GetToken()) != "")
 912                 {
 913                         if (!HasItem(two, item))
 914                         {
 915                                 result.append(" ");
 916                                 result.append(item);
 917                         }
 918                 }
 919                 return result;
 920         }
 921
 922         bool Capab(const std::deque<std::string> &params)
 923         {
 924                 if (params.size() < 1)
 925                 {
 926                         this->WriteLine("ERROR :Invalid number of parameters for CAPAB - Mismatched version");
 927                         return false;
 928                 }
 929
 930                 if (params[0] == "START")
 931                 {
 932                         this->ModuleList = "";
 933                         this->CapKeys.clear();
 934                 }
 935                 else if (params[0] == "END")
 936                 {
 937                         std::string reason = "";
 938                         int ip6support = 0;
 939 #ifdef SUPPORT_IP6LINKS
 940                         ip6support = 1;
 941 #endif
 942                         /* Compare ModuleList and check CapKeys...
 943                          * Maybe this could be tidier? -- Brain
 944                          */
 945                         if ((this->ModuleList != this->MyCapabilities()) && (this->ModuleList.length()))
 946                         {
 947                                 std::string diff = ListDifference(this->ModuleList, this->MyCapabilities());
 948                                 if (!diff.length())
 949                                 {
 950                                         diff = "your server:" + ListDifference(this->MyCapabilities(), this->ModuleList);
 951                                 }
 952                                 else
 953                                 {
 954                                         diff = "this server:" + diff;
 955                                 }
 956                                 if (diff.length() == 12)
 957                                         reason = "Module list in CAPAB is not alphabetically ordered, cannot compare lists.";
 958                                 else
 959                                         reason = "Modules loaded on these servers are not correctly matched, these modules are not loaded on " + diff;
 960                         }
 961
 962                         if (((this->CapKeys.find("IP6SUPPORT") == this->CapKeys.end()) && (ip6support)) || ((this->CapKeys.find("IP6SUPPORT") != this->CapKeys.end()) && (this->CapKeys.find("IP6SUPPORT")->second != ConvToStr(ip6support))))
 963                                 reason = "We don't both support linking to IPV6 servers";
 964
 965                         if (((this->CapKeys.find("IP6NATIVE") != this->CapKeys.end()) && (this->CapKeys.find("IP6NATIVE")->second == "1")) && (!ip6support))
 966                                 reason = "The remote server is IPV6 native, and we don't support linking to IPV6 servers";
 967
 968                         if (((this->CapKeys.find("NICKMAX") == this->CapKeys.end()) || ((this->CapKeys.find("NICKMAX") != this->CapKeys.end()) && (this->CapKeys.find("NICKMAX")->second != ConvToStr(NICKMAX)))))
 969                                 reason = "Maximum nickname lengths differ or remote nickname length not specified";
 970
 971                         if (((this->CapKeys.find("PROTOCOL") == this->CapKeys.end()) || ((this->CapKeys.find("PROTOCOL") != this->CapKeys.end()) && (this->CapKeys.find("PROTOCOL")->second != ConvToStr(ProtocolVersion)))))
 972                         {
 973                                 if (this->CapKeys.find("PROTOCOL") != this->CapKeys.end())
 974                                 {
 975                                         reason = "Mismatched protocol versions "+this->CapKeys.find("PROTOCOL")->second+" and "+ConvToStr(ProtocolVersion);
 976                                 }
 977                                 else
 978                                 {
 979                                         reason = "Protocol version not specified";
 980                                 }
 981                         }
 982
 983                         if (((this->CapKeys.find("HALFOP") == this->CapKeys.end()) && (Instance->Config->AllowHalfop)) || ((this->CapKeys.find("HALFOP") != this->CapKeys.end()) && (this->CapKeys.find("HALFOP")->second != ConvToStr(Instance->Config->AllowHalfop))))
 984                                 reason = "We don't both have halfop support enabled/disabled identically";
 985
 986                         if (((this->CapKeys.find("IDENTMAX") == this->CapKeys.end()) || ((this->CapKeys.find("IDENTMAX") != this->CapKeys.end()) && (this->CapKeys.find("IDENTMAX")->second != ConvToStr(IDENTMAX)))))
 987                                 reason = "Maximum ident lengths differ or remote ident length not specified";
 988
 989                         if (((this->CapKeys.find("CHANMAX") == this->CapKeys.end()) || ((this->CapKeys.find("CHANMAX") != this->CapKeys.end()) && (this->CapKeys.find("CHANMAX")->second != ConvToStr(CHANMAX)))))
 990                                 reason = "Maximum channel lengths differ or remote channel length not specified";
 991
 992                         if (((this->CapKeys.find("MAXMODES") == this->CapKeys.end()) || ((this->CapKeys.find("MAXMODES") != this->CapKeys.end()) && (this->CapKeys.find("MAXMODES")->second != ConvToStr(MAXMODES)))))
 993                                 reason = "Maximum modes per line differ or remote modes per line not specified";
 994
 995                         if (((this->CapKeys.find("MAXQUIT") == this->CapKeys.end()) || ((this->CapKeys.find("MAXQUIT") != this->CapKeys.end()) && (this->CapKeys.find("MAXQUIT")->second != ConvToStr(MAXQUIT)))))
 996                                 reason = "Maximum quit lengths differ or remote quit length not specified";
 997
 998                         if (((this->CapKeys.find("MAXTOPIC") == this->CapKeys.end()) || ((this->CapKeys.find("MAXTOPIC") != this->CapKeys.end()) && (this->CapKeys.find("MAXTOPIC")->second != ConvToStr(MAXTOPIC)))))
 999                                 reason = "Maximum topic lengths differ or remote topic length not specified";
1000
1001                         if (((this->CapKeys.find("MAXKICK") == this->CapKeys.end()) || ((this->CapKeys.find("MAXKICK") != this->CapKeys.end()) && (this->CapKeys.find("MAXKICK")->second != ConvToStr(MAXKICK)))))
1002                                 reason = "Maximum kick lengths differ or remote kick length not specified";
1003
1004                         if (((this->CapKeys.find("MAXGECOS") == this->CapKeys.end()) || ((this->CapKeys.find("MAXGECOS") != this->CapKeys.end()) && (this->CapKeys.find("MAXGECOS")->second != ConvToStr(MAXGECOS)))))
1005                                 reason = "Maximum GECOS (fullname) lengths differ or remote GECOS length not specified";
1006
1007                         if (((this->CapKeys.find("MAXAWAY") == this->CapKeys.end()) || ((this->CapKeys.find("MAXAWAY") != this->CapKeys.end()) && (this->CapKeys.find("MAXAWAY")->second != ConvToStr(MAXAWAY)))))
1008                                 reason = "Maximum awaymessage lengths differ or remote awaymessage length not specified";
1009
1010                         if (reason.length())
1011                         {
1012                                 this->WriteLine("ERROR :CAPAB negotiation failed: "+reason);
1013                                 return false;
1014                         }
1015                 }
1016                 else if ((params[0] == "MODULES") && (params.size() == 2))
1017                 {
1018                         if (!this->ModuleList.length())
1019                         {
1020                                 this->ModuleList.append(params[1]);
1021                         }
1022                         else
1023                         {
1024                                 this->ModuleList.append(",");
1025                                 this->ModuleList.append(params[1]);
1026                         }
1027                 }
1028                 else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
1029                 {
1030                         irc::tokenstream capabs(params[1]);
1031                         std::string item = "*";
1032                         while ((item = capabs.GetToken()) != "")
1033                         {
1034                                 /* Process each key/value pair */
1035                                 std::string::size_type equals = item.rfind('=');
1036                                 if (equals != std::string::npos)
1037                                 {
1038                                         std::string var = item.substr(0, equals);
1039                                         std::string value = item.substr(equals+1, item.length());
1040                                         this->Instance->Log(DEBUG,"Key='%s' Value='%s'",var.c_str(),value.c_str());
1041                                         CapKeys[var] = value;
1042                                 }
1043                         }
1044                 }
1045
1046                 return true;
1047         }
1048
1049         /** This function forces this server to quit, removing this server
1050          * and any users on it (and servers and users below that, etc etc).
1051          * It's very slow and pretty clunky, but luckily unless your network
1052          * is having a REAL bad hair day, this function shouldnt be called
1053          * too many times a month ;-)
1054          */
1055         void SquitServer(std::string &from, TreeServer* Current)
1056         {
1057                 /* recursively squit the servers attached to 'Current'.
1058                  * We're going backwards so we don't remove users
1059                  * while we still need them ;)
1060                  */
1061                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1062                 {
1063                         TreeServer* recursive_server = Current->GetChild(q);
1064                         this->SquitServer(from,recursive_server);
1065                 }
1066                 /* Now we've whacked the kids, whack self */
1067                 num_lost_servers++;
1068                 num_lost_users += Current->QuitUsers(from);
1069         }
1070
1071         /** This is a wrapper function for SquitServer above, which
1072          * does some validation first and passes on the SQUIT to all
1073          * other remaining servers.
1074          */
1075         void Squit(TreeServer* Current, const std::string &reason)
1076         {
1077                 if ((Current) && (Current != Utils->TreeRoot))
1078                 {
1079                         Event rmode((char*)Current->GetName().c_str(), (Module*)Utils->Creator, "lost_server");
1080                         rmode.Send(Instance);
1081
1082                         std::deque<std::string> params;
1083                         params.push_back(Current->GetName());
1084                         params.push_back(":"+reason);
1085                         Utils->DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
1086                         if (Current->GetParent() == Utils->TreeRoot)
1087                         {
1088                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
1089                         }
1090                         else
1091                         {
1092                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
1093                         }
1094                         num_lost_servers = 0;
1095                         num_lost_users = 0;
1096                         std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
1097                         SquitServer(from, Current);
1098                         Current->Tidy();
1099                         Current->GetParent()->DelChild(Current);
1100                         DELETE(Current);
1101                         this->Instance->WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
1102                 }
1103                 else
1104                 {
1105                         Instance->Log(DEFAULT,"Squit from unknown server");
1106                 }
1107         }
1108
1109         /** FMODE command - server mode with timestamp checks */
1110         bool ForceMode(const std::string &source, std::deque<std::string> &params)
1111         {
1112                 /* Chances are this is a 1.0 FMODE without TS */
1113                 if (params.size() < 3)
1114                 {
1115                         /* No modes were in the command, probably a channel with no modes set on it */
1116                         return true;
1117                 }
1118
1119                 bool smode = false;
1120                 std::string sourceserv;
1121
1122                 /* Are we dealing with an FMODE from a user, or from a server? */
1123                 userrec* who = this->Instance->FindNick(source);
1124                 if (who)
1125                 {
1126                         /* FMODE from a user, set sourceserv to the users server name */
1127                         sourceserv = who->server;
1128                 }
1129                 else
1130                 {
1131                         /* FMODE from a server, create a fake user to receive mode feedback */
1132                         who = new userrec(this->Instance);
1133                         who->SetFd(FD_MAGIC_NUMBER);
1134                         smode = true;           /* Setting this flag tells us we should free the userrec later */
1135                         sourceserv = source;    /* Set sourceserv to the actual source string */
1136                 }
1137                 const char* modelist[64];
1138                 time_t TS = 0;
1139                 int n = 0;
1140                 memset(&modelist,0,sizeof(modelist));
1141                 for (unsigned int q = 0; (q < params.size()) && (q < 64); q++)
1142                 {
1143                         if (q == 1)
1144                         {
1145                                 /* The timestamp is in this position.
1146                                  * We don't want to pass that up to the
1147                                  * server->client protocol!
1148                                  */
1149                                 TS = atoi(params[q].c_str());
1150                         }
1151                         else
1152                         {
1153                                 /* Everything else is fine to append to the modelist */
1154                                 modelist[n++] = params[q].c_str();
1155                         }
1156
1157                 }
1158                 /* Extract the TS value of the object, either userrec or chanrec */
1159                 userrec* dst = this->Instance->FindNick(params[0]);
1160                 chanrec* chan = NULL;
1161                 time_t ourTS = 0;
1162                 if (dst)
1163                 {
1164                         ourTS = dst->age;
1165                 }
1166                 else
1167                 {
1168                         chan = this->Instance->FindChan(params[0]);
1169                         if (chan)
1170                         {
1171                                 ourTS = chan->age;
1172                         }
1173                         else
1174                                 /* Oops, channel doesnt exist! */
1175                                 return true;
1176                 }
1177
1178                 /* TS is equal: Merge the mode changes, use voooodoooooo on modes
1179                  * with parameters.
1180                  */
1181                 if (TS == ourTS)
1182                 {
1183                         Instance->Log(DEBUG,"Entering TS equality check");
1184                         ModeHandler* mh = NULL;
1185                         unsigned long paramptr = 3;
1186                         std::string to_bounce = "";
1187                         std::string to_keep = "";
1188                         std::vector<std::string> params_to_keep;
1189                         std::string params_to_bounce = "";
1190                         bool adding = true;
1191                         char cur_change = 1;
1192                         char old_change = 0;
1193                         char old_bounce_change = 0;
1194                         /* Merge modes, basically do special stuff to mode with params */
1195                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1196                         {
1197                                 switch (*x)
1198                                 {
1199                                         case '-':
1200                                                 adding = false;
1201                                         break;
1202                                         case '+':
1203                                                 adding = true;
1204                                         break;
1205                                         default:
1206                                                 if (adding)
1207                                                 {
1208                                                         /* We only care about whats being set,
1209                                                          * not whats being unset
1210                                                          */
1211                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1212
1213                                                         if ((mh) && (mh->GetNumParams(adding) > 0) && (!mh->IsListMode()))
1214                                                         {
1215                                                                 /* We only want to do special things to
1216                                                                  * modes with parameters, we are going to rewrite
1217                                                                  * those parameters
1218                                                                  */
1219                                                                 ModePair ret;
1220                                                                 adding ? cur_change = '+' : cur_change = '-';
1221
1222                                                                 ret = mh->ModeSet(smode ? NULL : who, dst, chan, params[paramptr]);
1223
1224                                                                 /* The mode is set here, check which we should keep */
1225                                                                 if (ret.first)
1226                                                                 {
1227                                                                         bool which_to_keep = mh->CheckTimeStamp(TS, ourTS, params[paramptr], ret.second, chan);
1228
1229                                                                         if (which_to_keep == true)
1230                                                                         {
1231                                                                                 /* Keep ours, bounce theirs:
1232                                                                                  * Send back ours to them and
1233                                                                                  * drop their mode changs
1234                                                                                  */
1235                                                                                 adding ? cur_change = '+' : cur_change = '-';
1236                                                                                 if (cur_change != old_bounce_change)
1237                                                                                         to_bounce += cur_change;
1238                                                                                 to_bounce += *x;
1239                                                                                 old_bounce_change = cur_change;
1240
1241                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1242                                                                                         params_to_bounce.append(" ").append(ret.second);
1243                                                                         }
1244                                                                         else
1245                                                                         {
1246                                                                                 /* Keep theirs: Accept their mode change,
1247                                                                                  * do nothing else
1248                                                                                  */
1249                                                                                 adding ? cur_change = '+' : cur_change = '-';
1250                                                                                 if (cur_change != old_change)
1251                                                                                         to_keep += cur_change;
1252                                                                                 to_keep += *x;
1253                                                                                 old_change = cur_change;
1254
1255                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1256                                                                                         params_to_keep.push_back(params[paramptr]);
1257                                                                         }
1258                                                                 }
1259                                                                 else
1260                                                                 {
1261                                                                         /* Mode isnt set here, we want it */
1262                                                                         adding ? cur_change = '+' : cur_change = '-';
1263                                                                         if (cur_change != old_change)
1264                                                                                 to_keep += cur_change;
1265                                                                         to_keep += *x;
1266                                                                         old_change = cur_change;
1267
1268                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1269                                                                                 params_to_keep.push_back(params[paramptr]);
1270                                                                 }
1271
1272                                                                 paramptr++;
1273                                                         }
1274                                                         else
1275                                                         {
1276                                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1277
1278                                                                 if (mh)
1279                                                                 {
1280                                                                         adding ? cur_change = '+' : cur_change = '-';
1281
1282                                                                         /* Just keep this, safe to merge with no checks
1283                                                                          * it has no parameters
1284                                                                          */
1285
1286                                                                         if (cur_change != old_change)
1287                                                                                 to_keep += cur_change;
1288                                                                         to_keep += *x;
1289                                                                         old_change = cur_change;
1290
1291                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1292                                                                         {
1293                                                                                 Instance->Log(DEBUG,"Mode removal %d %d",adding, mh->GetNumParams(adding));
1294                                                                                 params_to_keep.push_back(params[paramptr++]);
1295                                                                         }
1296                                                                 }
1297                                                         }
1298                                                 }
1299                                                 else
1300                                                 {
1301                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1302
1303                                                         if (mh)
1304                                                         {
1305                                                                 /* Taking a mode away */
1306                                                                 adding ? cur_change = '+' : cur_change = '-';
1307
1308                                                                 if (cur_change != old_change)
1309                                                                         to_keep += cur_change;
1310                                                                 to_keep += *x;
1311                                                                 old_change = cur_change;
1312
1313                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1314                                                                         params_to_keep.push_back(params[paramptr++]);
1315                                                         }
1316                                                 }
1317                                         break;
1318                                 }
1319                         }
1320
1321                         if (to_bounce.length())
1322                         {
1323                                 std::deque<std::string> newparams;
1324                                 newparams.push_back(params[0]);
1325                                 newparams.push_back(ConvToStr(ourTS));
1326                                 newparams.push_back(to_bounce+params_to_bounce);
1327                                 Instance->Log(DEBUG,"BOUNCE BACK: %s",(to_bounce+params_to_bounce).c_str());
1328                                 Utils->DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1329                         }
1330
1331                         if (to_keep.length())
1332                         {
1333                                 unsigned int n = 2;
1334                                 unsigned int q = 0;
1335                                 modelist[0] = params[0].c_str();
1336                                 modelist[1] = to_keep.c_str();
1337
1338                                 if (params_to_keep.size() > 0)
1339                                 {
1340                                         for (q = 0; (q < params_to_keep.size()) && (q < 64); q++)
1341                                         {
1342                                                 Instance->Log(DEBUG,"KEEP Item %d of %d: %s", q, params_to_keep.size(), params_to_keep[q].c_str());
1343                                                 modelist[n++] = params_to_keep[q].c_str();
1344                                         }
1345                                 }
1346
1347                                 if (smode)
1348                                 {
1349                                         Instance->Log(DEBUG,"Send mode");
1350                                         this->Instance->SendMode(modelist, n, who);
1351                                 }
1352                                 else
1353                                 {
1354                                         Instance->Log(DEBUG,"Send mode client");
1355                                         this->Instance->CallCommandHandler("MODE", modelist, n, who);
1356                                 }
1357
1358                                 /* HOT POTATO! PASS IT ON! */
1359                                 Utils->DoOneToAllButSender(source,"FMODE",params,sourceserv);
1360                         }
1361                 }
1362                 else
1363                 /* U-lined servers always win regardless of their TS */
1364                 if ((TS > ourTS) && (!this->Instance->ULine(source.c_str())))
1365                 {
1366                         /* Bounce the mode back to its sender.* We use our lower TS, so the other end
1367                          * SHOULD accept it, if its clock is right.
1368                          *
1369                          * NOTE: We should check that we arent bouncing anything thats already set at this end.
1370                          * If we are, bounce +ourmode to 'reinforce' it. This prevents desyncs.
1371                          * e.g. They send +l 50, we have +l 10 set. rather than bounce -l 50, we bounce +l 10.
1372                          *
1373                          * Thanks to jilles for pointing out this one-hell-of-an-issue before i even finished
1374                          * writing the code. It took me a while to come up with this solution.
1375                          *
1376                          * XXX: BE SURE YOU UNDERSTAND THIS CODE FULLY BEFORE YOU MESS WITH IT.
1377                          */
1378
1379                         std::deque<std::string> newparams;      /* New parameter list we send back */
1380                         newparams.push_back(params[0]);         /* Target, user or channel */
1381                         newparams.push_back(ConvToStr(ourTS));  /* Timestamp value of the target */
1382                         newparams.push_back("");                /* This contains the mode string. For now
1383                                                                  * it's empty, we fill it below.
1384                                                                  */
1385
1386                         /* Intelligent mode bouncing. Don't just invert, reinforce any modes which are already
1387                          * set to avoid a desync here.
1388                          */
1389                         std::string modebounce = "";
1390                         bool adding = true;
1391                         unsigned int t = 3;
1392                         ModeHandler* mh = NULL;
1393                         char cur_change = 1;
1394                         char old_change = 0;
1395                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1396                         {
1397                                 /* Iterate over all mode chars in the sent set */
1398                                 switch (*x)
1399                                 {
1400                                         /* Adding or subtracting modes? */
1401                                         case '-':
1402                                                 adding = false;
1403                                         break;
1404                                         case '+':
1405                                                 adding = true;
1406                                         break;
1407                                         default:
1408                                                 /* Find the mode handler for this mode */
1409                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1410
1411                                                 /* Got a mode handler?
1412                                                  * This also prevents us bouncing modes we have no handler for.
1413                                                  */
1414                                                 if (mh)
1415                                                 {
1416                                                         ModePair ret;
1417                                                         std::string p = "";
1418
1419                                                         /* Does the mode require a parameter right now?
1420                                                          * If it does, fetch it if we can
1421                                                          */
1422                                                         if ((mh->GetNumParams(adding) > 0) && (t < params.size()))
1423                                                                 p = params[t++];
1424
1425                                                         /* Call the ModeSet method to determine if its set with the
1426                                                          * given parameter here or not.
1427                                                          */
1428                                                         ret = mh->ModeSet(smode ? NULL : who, dst, chan, p);
1429
1430                                                         /* XXX: Really. Dont ask.
1431                                                          * Determine from if its set combined with what the current
1432                                                          * 'state' is (adding or not) as to wether we should 'invert'
1433                                                          * or 'reinforce' the mode change
1434                                                          */
1435                                                         (!ret.first ? (adding ? cur_change = '-' : cur_change = '+') : (!adding ? cur_change = '-' : cur_change = '+'));
1436
1437                                                         /* Quickly determine if we have 'flipped' from + to -,
1438                                                          * or - to +, to prevent unneccessary +/- chars in the
1439                                                          * output string that waste bandwidth
1440                                                          */
1441                                                         if (cur_change != old_change)
1442                                                                 modebounce += cur_change;
1443                                                         old_change = cur_change;
1444
1445                                                         /* Add the mode character to the output string */
1446                                                         modebounce += mh->GetModeChar();
1447
1448                                                         /* We got a parameter back from ModeHandler::ModeSet,
1449                                                          * are we supposed to be sending one out right now?
1450                                                          */
1451                                                         if (ret.second.length())
1452                                                         {
1453                                                                 if (mh->GetNumParams(cur_change == '+') > 0)
1454                                                                         /* Yes we're supposed to be sending out
1455                                                                          * the parameter. Make sure it goes
1456                                                                          */
1457                                                                         newparams.push_back(ret.second);
1458                                                         }
1459
1460                                                 }
1461                                         break;
1462                                 }
1463                         }
1464
1465                         /* Update the parameters for FMODE with the new 'bounced' string */
1466                         newparams[2] = modebounce;
1467                         /* Only send it back the way it came, no need to send it anywhere else */
1468                         Utils->DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1469                         Instance->Log(DEBUG,"FMODE bounced intelligently, our TS less than theirs and the other server is NOT a uline.");
1470                 }
1471                 else
1472                 {
1473                         Instance->Log(DEBUG,"Allow modes, TS lower for sender");
1474                         /* The server was ulined, but something iffy is up with the TS.
1475                          * Sound the alarm bells!
1476                          */
1477                         if ((this->Instance->ULine(sourceserv.c_str())) && (TS > ourTS))
1478                         {
1479                                 this->Instance->WriteOpers("\2WARNING!\2 U-Lined server '%s' has bad TS for '%s' (accepted change): \2SYNC YOUR CLOCKS\2 to avoid this notice",sourceserv.c_str(),params[0].c_str());
1480                         }
1481                         /* Allow the mode, route it to either server or user command handling */
1482                         if (smode)
1483                                 this->Instance->SendMode(modelist,n,who);
1484                         else
1485                                 this->Instance->CallCommandHandler("MODE", modelist, n, who);
1486
1487                         /* HOT POTATO! PASS IT ON! */
1488                         Utils->DoOneToAllButSender(source,"FMODE",params,sourceserv);
1489                 }
1490                 /* Are we supposed to free the userrec? */
1491                 if (smode)
1492                         DELETE(who);
1493
1494                 return true;
1495         }
1496
1497         /** FTOPIC command */
1498         bool ForceTopic(const std::string &source, std::deque<std::string> &params)
1499         {
1500                 if (params.size() != 4)
1501                         return true;
1502                 time_t ts = atoi(params[1].c_str());
1503                 std::string nsource = source;
1504
1505                 chanrec* c = this->Instance->FindChan(params[0]);
1506                 if (c)
1507                 {
1508                         if ((ts >= c->topicset) || (!*c->topic))
1509                         {
1510                                 std::string oldtopic = c->topic;
1511                                 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
1512                                 strlcpy(c->setby,params[2].c_str(),NICKMAX-1);
1513                                 c->topicset = ts;
1514                                 /* if the topic text is the same as the current topic,
1515                                  * dont bother to send the TOPIC command out, just silently
1516                                  * update the set time and set nick.
1517                                  */
1518                                 if (oldtopic != params[3])
1519                                 {
1520                                         userrec* user = this->Instance->FindNick(source);
1521                                         if (!user)
1522                                         {
1523                                                 c->WriteChannelWithServ(source.c_str(), "TOPIC %s :%s", c->name, c->topic);
1524                                         }
1525                                         else
1526                                         {
1527                                                 c->WriteChannel(user, "TOPIC %s :%s", c->name, c->topic);
1528                                                 nsource = user->server;
1529                                         }
1530                                         /* all done, send it on its way */
1531                                         params[3] = ":" + params[3];
1532                                         Utils->DoOneToAllButSender(source,"FTOPIC",params,nsource);
1533                                 }
1534                         }
1535
1536                 }
1537
1538                 return true;
1539         }
1540
1541         /** FJOIN, similar to TS6 SJOIN, but not quite. */
1542         bool ForceJoin(const std::string &source, std::deque<std::string> &params)
1543         {
1544                 /* 1.1 FJOIN works as follows:
1545                  *
1546                  * Each FJOIN is sent along with a timestamp, and the side with the lowest
1547                  * timestamp 'wins'. From this point on we will refer to this side as the
1548                  * winner. The side with the higher timestamp loses, from this point on we
1549                  * will call this side the loser or losing side. This should be familiar to
1550                  * anyone who's dealt with dreamforge or TS6 before.
1551                  *
1552                  * When two sides of a split heal and this occurs, the following things
1553                  * will happen:
1554                  *
1555                  * If the timestamps are exactly equal, both sides merge their privilages
1556                  * and users, as in InspIRCd 1.0 and ircd2.8. The channels have not been
1557                  * re-created during a split, this is safe to do.
1558                  *
1559                  *
1560                  * If the timestamps are NOT equal, the losing side removes all privilage
1561                  * modes from all of its users that currently exist in the channel, before
1562                  * introducing new users into the channel which are listed in the FJOIN
1563                  * command's parameters. This means, all modes +ohv, and privilages added
1564                  * by modules, such as +qa. The losing side then LOWERS its timestamp value
1565                  * of the channel to match that of the winning side, and the modes of the
1566                  * users of the winning side are merged in with the losing side. The loser
1567                  * then sends out a set of FMODE commands which 'confirm' that it just
1568                  * removed all privilage modes from its existing users, which allows for
1569                  * services packages to still work correctly without needing to know the
1570                  * timestamping rules which InspIRCd follows. In TS6 servers this is always
1571                  * a problem, and services packages must contain code which explicitly
1572                  * behaves as TS6 does, removing ops from the losing side of a split where
1573                  * neccessary within its internal records, as this state information is
1574                  * not explicitly echoed out in that protocol.
1575                  *
1576                  * The winning side on the other hand will ignore all user modes from the
1577                  * losing side, so only its own modes get applied. Life is simple for those
1578                  * who succeed at internets. :-)
1579                  *
1580                  * NOTE: Unlike TS6 and dreamforge and other protocols which have SJOIN,
1581                  * FJOIN does not contain the simple-modes such as +iklmnsp. Why not,
1582                  * you ask? Well, quite simply because we don't need to. They'll be sent
1583                  * after the FJOIN by FMODE, and FMODE is timestamped, so in the event
1584                  * the losing side sends any modes for the channel which shouldnt win,
1585                  * they wont as their timestamp will be too high :-)
1586                  */
1587
1588                 if (params.size() < 3)
1589                         return true;
1590
1591                 char first[MAXBUF];             /* The first parameter of the mode command */
1592                 char modestring[MAXBUF];        /* The mode sequence (2nd parameter) of the mode command */
1593                 char* mode_users[127];          /* The values used by the mode command */
1594                 memset(&mode_users,0,sizeof(mode_users));       /* Initialize mode parameters */
1595                 mode_users[0] = first;          /* Set this up to be our on-stack value */
1596                 mode_users[1] = modestring;     /* Same here as above */
1597                 strcpy(modestring,"+");         /* Initialize the mode sequence to just '+' */
1598                 unsigned int modectr = 2;       /* Pointer to the third mode parameter (e.g. the one after the +-sequence) */
1599
1600                 userrec* who = NULL;                    /* User we are currently checking */
1601                 std::string channel = params[0];        /* Channel name, as a string */
1602                 time_t TS = atoi(params[1].c_str());    /* Timestamp given to us for remote side */
1603                 bool created = false;
1604
1605                 /* Try and find the channel */
1606                 chanrec* chan = this->Instance->FindChan(channel);
1607
1608                 /* Initialize channel name in the mode parameters */
1609                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
1610
1611                 /* default TS is a high value, which if we dont have this
1612                  * channel will let the other side apply their modes.
1613                  */
1614                 time_t ourTS = Instance->Time(true)+600;
1615
1616                 /* Does this channel exist? if it does, get its REAL timestamp */
1617                 if (chan)
1618                         ourTS = chan->age;
1619                 else
1620                         created = true; /* don't perform deops, and set TS to correct time after processing. */
1621
1622                 /* In 1.1, if they have the newer channel, we immediately clear
1623                  * all status modes from our users. We then accept their modes.
1624                  * If WE have the newer channel its the other side's job to do this.
1625                  * Note that this causes the losing server to send out confirming
1626                  * FMODE lines.
1627                  */
1628                 if (ourTS > TS)
1629                 {
1630                         std::deque<std::string> param_list;
1631
1632                         /* Lower the TS here */
1633                         if (Utils->AnnounceTSChange && chan)
1634                                 chan->WriteChannelWithServ(Instance->Config->ServerName,
1635                                 "NOTICE %s :TS for %s changed from %lu to %lu", chan->name, chan->name, ourTS, TS);
1636                         ourTS = TS;
1637                         param_list.push_back(channel);
1638
1639                         /* Zap all the privilage modes on our side, if the channel exists here */
1640                         if (!created)
1641                         {
1642                                 this->RemoveStatus(Instance->Config->ServerName, param_list);
1643                                 chan->age = TS;
1644                         }
1645                 }
1646
1647                 /* Put the final parameter of the FJOIN into a tokenstream ready to split it */
1648                 irc::tokenstream users(params[2]);
1649                 std::string item = "*";
1650
1651                 /* do this first, so our mode reversals are correctly received by other servers
1652                  * if there is a TS collision.
1653                  */
1654                 params[2] = ":" + params[2];
1655                 Utils->DoOneToAllButSender(source,"FJOIN",params,source);
1656
1657                 /* Now, process every 'prefixes,nick' pair */
1658                 while (item != "")
1659                 {
1660                         /* Find next user */
1661                         item = users.GetToken();
1662
1663                         const char* usr = item.c_str();
1664
1665                         /* Safety check just to make sure someones not sent us an FJOIN full of spaces
1666                          * (is this even possible?) */
1667                         if (usr && *usr)
1668                         {
1669                                 const char* permissions = usr;
1670                                 int ntimes = 0;
1671                                 char* nm = new char[MAXBUF];
1672                                 char* tnm = nm;
1673
1674                                 /* Iterate through all the prefix values, convert them from prefixes
1675                                  * to mode letters, and append them to the mode sequence
1676                                  */
1677                                 while ((*permissions) && (*permissions != ',') && (ntimes < MAXBUF))
1678                                 {
1679                                         ModeHandler* mh = Instance->Modes->FindPrefix(*permissions);
1680                                         if (mh)
1681                                         {
1682                                                 /* This is a valid prefix */
1683                                                 ntimes++;
1684                                                 *tnm++ = mh->GetModeChar();
1685                                         }
1686                                         else
1687                                         {
1688                                                 /* Not a valid prefix...
1689                                                  * danger bill bobbertson! (that's will robinsons older brother ;-) ...)
1690                                                  */
1691                                                 this->Instance->WriteOpers("ERROR: We received a user with an unknown prefix '%c'. Closed connection to avoid a desync.",*permissions);
1692                                                 this->WriteLine(std::string("ERROR :Invalid prefix '")+(*permissions)+"' in FJOIN");
1693                                                 return false;
1694                                         }
1695                                         usr++;
1696                                         permissions++;
1697                                 }
1698
1699                                 /* Null terminate modes */
1700                                 *tnm = 0;
1701                                 /* Advance past the comma, to the nick */
1702                                 usr++;
1703
1704                                 /* Check the user actually exists */
1705                                 who = this->Instance->FindNick(usr);
1706                                 if (who)
1707                                 {
1708                                         /* Did they get any modes? How many times? */
1709                                         strlcat(modestring, nm, MAXBUF);
1710                                         for (int k = 0; k < ntimes; k++)
1711                                                 mode_users[modectr++] = strdup(usr);
1712
1713                                         /* Free temporary buffer used for mode sequence */
1714                                         delete[] nm;
1715
1716                                         /* Check that the user's 'direction' is correct
1717                                          * based on the server sending the FJOIN. We must
1718                                          * check each nickname in turn, because the origin of
1719                                          * the FJOIN may be different to the origin of the nicks
1720                                          * in the command itself.
1721                                          */
1722                                         TreeServer* route_back_again = Utils->BestRouteTo(who->server);
1723                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
1724                                         {
1725                                                 /* Oh dear oh dear. */
1726                                                 Instance->Log(DEBUG,"Fake direction in FJOIN, user '%s'",who->nick);
1727                                                 continue;
1728                                         }
1729                                         /* Finally, we can actually place the user into the channel.
1730                                          * We're sure its right. Final answer, phone a friend.
1731                                          */
1732                                         chanrec::JoinUser(this->Instance, who, channel.c_str(), true, "");
1733
1734                                         /* Have we already queued up MAXMODES modes with parameters
1735                                          * (+qaohv) ready to be sent to the server?
1736                                          */
1737                                         if (modectr >= (MAXMODES-1))
1738                                         {
1739                                                 /* Only actually give the users any status if we lost
1740                                                  * the FJOIN or drew (equal timestamps).
1741                                                  * It isn't actually possible for ourTS to be > TS here,
1742                                                  * only possible to actually have ourTS == TS, or
1743                                                  * ourTS < TS, because if we lost, we already lowered
1744                                                  * our TS above before we entered this loop. We only
1745                                                  * check >= as a safety measure, in case someone stuffed
1746                                                  * up. If someone DID stuff up, it was most likely me.
1747                                                  * Note: I do not like baseball bats in the face...
1748                                                  */
1749                                                 if (ourTS >= TS)
1750                                                 {
1751                                                         Instance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1752                                                         this->Instance->SendMode((const char**)mode_users,modectr,who);
1753
1754                                                         /* Something stuffed up, and for some reason, the timestamp is
1755                                                          * NOT lowered right now and should be. Lower it. Usually this
1756                                                          * code won't be executed, doubtless someone will remove it some
1757                                                          * day soon.
1758                                                          */
1759                                                         if (ourTS > TS)
1760                                                         {
1761                                                                 Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
1762                                                                 chan->age = TS;
1763                                                                 ourTS = TS;
1764                                                         }
1765                                                 }
1766
1767                                                 /* Reset all this back to defaults, and
1768                                                  * free any ram we have left allocated.
1769                                                  */
1770                                                 strcpy(mode_users[1],"+");
1771                                                 for (unsigned int f = 2; f < modectr; f++)
1772                                                         free(mode_users[f]);
1773                                                 modectr = 2;
1774                                         }
1775                                 }
1776                                 else
1777                                 {
1778                                         /* Remember to free this */
1779                                         delete[] nm;
1780                                         /* If we got here, there's a nick in FJOIN which doesnt exist on this server.
1781                                          * We don't try to process the nickname here (that WOULD cause a segfault because
1782                                          * we'd be playing with null pointers) however, we DO pass the nickname on, just
1783                                          * in case somehow we're desynched, so that other users which might be able to see
1784                                          * the nickname get their fair chance to process it.
1785                                          */
1786                                         Instance->Log(SPARSE,"Warning! Invalid user in FJOIN to channel %s IGNORED", channel.c_str());
1787                                         continue;
1788                                 }
1789                         }
1790                 }
1791
1792                 /* there werent enough modes built up to flush it during FJOIN,
1793                  * or, there are a number left over. flush them out.
1794                  */
1795                 if ((modectr > 2) && (who) && (chan))
1796                 {
1797                         if (ourTS >= TS)
1798                         {
1799                                 /* Our channel is newer than theirs. Evil deeds must be afoot. */
1800                                 this->Instance->SendMode((const char**)mode_users,modectr,who);
1801                                 /* Yet again, we can't actually get a true value here, if everything else
1802                                  * is working as it should.
1803                                  */
1804                                 if (ourTS > TS)
1805                                 {
1806                                         Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
1807                                         chan->age = TS;
1808                                         ourTS = TS;
1809                                 }
1810                         }
1811
1812                         /* Free anything we have left to free */
1813                         for (unsigned int f = 2; f < modectr; f++)
1814                                 free(mode_users[f]);
1815                 }
1816
1817                 /* if we newly created the channel, set it's TS properly. */
1818                 if (created)
1819                 {
1820                         /* find created channel .. */
1821                         chan = this->Instance->FindChan(channel);
1822                         if (chan)
1823                                 /* w00t said this shouldnt be needed but it is.
1824                                  * This isnt strictly true, as chan can be NULL
1825                                  * if a nick collision has occured and therefore
1826                                  * the channel was never created.
1827                                  */
1828                                 chan->age = TS;
1829                 }
1830
1831                 /* All done. That wasnt so bad was it, you can wipe
1832                  * the sweat from your forehead now. :-)
1833                  */
1834                 return true;
1835         }
1836
1837         /** NICK command */
1838         bool IntroduceClient(const std::string &source, std::deque<std::string> &params)
1839         {
1840                 if (params.size() < 8)
1841                         return true;
1842                 if (params.size() > 8)
1843                 {
1844                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
1845                         return true;
1846                 }
1847                 // NICK age nick host dhost ident +modes ip :gecos
1848                 //       0    1   2     3     4      5   6     7
1849                 time_t age = atoi(params[0].c_str());
1850
1851                 /* This used to have a pretty craq'y loop doing the same thing,
1852                  * now we just let the STL do the hard work (more efficiently)
1853                  */
1854                 std::string::size_type pos_after_plus = params[5].find_first_not_of('+');
1855                 if (pos_after_plus != std::string::npos)
1856                         params[5] = params[5].substr(pos_after_plus);
1857
1858                 const char* tempnick = params[1].c_str();
1859                 Instance->Log(DEBUG,"Introduce client %s!%s@%s",tempnick,params[4].c_str(),params[2].c_str());
1860
1861                 user_hash::iterator iter = this->Instance->clientlist.find(tempnick);
1862
1863                 if (iter != this->Instance->clientlist.end())
1864                 {
1865                         // nick collision
1866                         Instance->Log(DEBUG,"Nick collision on %s!%s@%s: %lu %lu",tempnick,params[4].c_str(),params[2].c_str(),(unsigned long)age,(unsigned long)iter->second->age);
1867                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+tempnick+" :Nickname collision");
1868                         userrec::QuitUser(this->Instance, iter->second, "Nickname collision");
1869                         return true;
1870                 }
1871
1872                 userrec* _new = new userrec(this->Instance);
1873                 this->Instance->clientlist[tempnick] = _new;
1874                 _new->SetFd(FD_MAGIC_NUMBER);
1875                 strlcpy(_new->nick, tempnick,NICKMAX-1);
1876                 strlcpy(_new->host, params[2].c_str(),63);
1877                 strlcpy(_new->dhost, params[3].c_str(),63);
1878                 _new->server = this->Instance->FindServerNamePtr(source.c_str());
1879                 strlcpy(_new->ident, params[4].c_str(),IDENTMAX);
1880                 strlcpy(_new->fullname, params[7].c_str(),MAXGECOS);
1881                 _new->registered = REG_ALL;
1882                 _new->signon = age;
1883
1884                 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
1885                         _new->modes[(*v)-65] = 1;
1886
1887 #ifdef SUPPORT_IP6LINKS
1888                 if (params[6].find_first_of(":") != std::string::npos)
1889                         _new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
1890                 else
1891 #endif
1892                         _new->SetSockAddr(AF_INET, params[6].c_str(), 0);
1893
1894                 this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString());
1895
1896                 params[7] = ":" + params[7];
1897                 Utils->DoOneToAllButSender(source,"NICK",params,source);
1898
1899                 // Increment the Source Servers User Count..
1900                 TreeServer* SourceServer = Utils->FindServer(source);
1901                 if (SourceServer)
1902                 {
1903                         Instance->Log(DEBUG,"Found source server of %s",_new->nick);
1904                         SourceServer->AddUserCount();
1905                 }
1906
1907                 FOREACH_MOD_I(Instance,I_OnPostConnect,OnPostConnect(_new));
1908
1909                 return true;
1910         }
1911
1912         /** Send one or more FJOINs for a channel of users.
1913          * If the length of a single line is more than 480-NICKMAX
1914          * in length, it is split over multiple lines.
1915          */
1916         void SendFJoins(TreeServer* Current, chanrec* c)
1917         {
1918                 std::string buffer;
1919
1920                 Instance->Log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1921                 char list[MAXBUF];
1922                 std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
1923
1924                 size_t dlen, curlen;
1925                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1926                 int numusers = 0;
1927                 char* ptr = list + dlen;
1928
1929                 CUList *ulist = c->GetUsers();
1930                 std::string modes = "";
1931                 std::string params = "";
1932
1933                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1934                 {
1935                         // The first parameter gets a : before it
1936                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick);
1937
1938                         curlen += ptrlen;
1939                         ptr += ptrlen;
1940
1941                         numusers++;
1942
1943                         if (curlen > (480-NICKMAX))
1944                         {
1945                                 buffer.append(list).append("\r\n");
1946
1947                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1948                                 ptr = list + dlen;
1949                                 ptrlen = 0;
1950                                 numusers = 0;
1951                         }
1952                 }
1953
1954                 if (numusers)
1955                         buffer.append(list).append("\r\n");
1956
1957                 /* Sorry for the hax. Because newly created channels assume +nt,
1958                  * if this channel doesnt have +nt, explicitly send -n and -t for the missing modes.
1959                  */
1960                 bool inverted = false;
1961                 if (!c->IsModeSet('n'))
1962                 {
1963                         modes.append("-n");
1964                         inverted = true;
1965                 }
1966                 if (!c->IsModeSet('t'))
1967                 {
1968                         modes.append("-t");
1969                         inverted = true;
1970                 }
1971                 if (inverted)
1972                 {
1973                         modes.append("+");
1974                 }
1975
1976                 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1977                 {
1978                         modes.append("b");
1979                         params.append(" ").append(b->data);
1980
1981                         if (params.length() >= MAXMODES)
1982                         {
1983                                 /* Wrap at MAXMODES */
1984                                 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");
1985                                 modes = "";
1986                                 params = "";
1987                         }
1988                 }
1989
1990                 buffer.append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(c->ChanModes(true));
1991
1992                 /* Only send these if there are any */
1993                 if (!modes.empty())
1994                         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);
1995
1996                 this->WriteLine(buffer);
1997         }
1998
1999         /** Send G, Q, Z and E lines */
2000         void SendXLines(TreeServer* Current)
2001         {
2002                 char data[MAXBUF];
2003                 std::string buffer;
2004                 std::string n = this->Instance->Config->ServerName;
2005                 const char* sn = n.c_str();
2006                 int iterations = 0;
2007                 /* Yes, these arent too nice looking, but they get the job done */
2008                 for (std::vector<ZLine*>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++, iterations++)
2009                 {
2010                         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);
2011                         buffer.append(data);
2012                 }
2013                 for (std::vector<QLine*>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++, iterations++)
2014                 {
2015                         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);
2016                         buffer.append(data);
2017                 }
2018                 for (std::vector<GLine*>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++, iterations++)
2019                 {
2020                         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);
2021                         buffer.append(data);
2022                 }
2023                 for (std::vector<ELine*>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++, iterations++)
2024                 {
2025                         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);
2026                         buffer.append(data);
2027                 }
2028                 for (std::vector<ZLine*>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++, iterations++)
2029                 {
2030                         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);
2031                         buffer.append(data);
2032                 }
2033                 for (std::vector<QLine*>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++, iterations++)
2034                 {
2035                         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);
2036                         buffer.append(data);
2037                 }
2038                 for (std::vector<GLine*>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++, iterations++)
2039                 {
2040                         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);
2041                         buffer.append(data);
2042                 }
2043                 for (std::vector<ELine*>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++, iterations++)
2044                 {
2045                         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);
2046                         buffer.append(data);
2047                 }
2048
2049                 if (!buffer.empty())
2050                         this->WriteLine(buffer);
2051         }
2052
2053         /** Send channel modes and topics */
2054         void SendChannelModes(TreeServer* Current)
2055         {
2056                 char data[MAXBUF];
2057                 std::deque<std::string> list;
2058                 int iterations = 0;
2059                 std::string n = this->Instance->Config->ServerName;
2060                 const char* sn = n.c_str();
2061                 for (chan_hash::iterator c = this->Instance->chanlist.begin(); c != this->Instance->chanlist.end(); c++, iterations++)
2062                 {
2063                         SendFJoins(Current, c->second);
2064                         if (*c->second->topic)
2065                         {
2066                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
2067                                 this->WriteLine(data);
2068                         }
2069                         FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)Utils->Creator,(void*)this));
2070                         list.clear();
2071                         c->second->GetExtList(list);
2072                         for (unsigned int j = 0; j < list.size(); j++)
2073                         {
2074                                 FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)Utils->Creator,(void*)this,list[j]));
2075                         }
2076                 }
2077         }
2078
2079         /** send all users and their oper state/modes */
2080         void SendUsers(TreeServer* Current)
2081         {
2082                 char data[MAXBUF];
2083                 std::deque<std::string> list;
2084                 std::string dataline;
2085                 int iterations = 0;
2086                 for (user_hash::iterator u = this->Instance->clientlist.begin(); u != this->Instance->clientlist.end(); u++, iterations++)
2087                 {
2088                         if (u->second->registered == REG_ALL)
2089                         {
2090                                 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);
2091                                 this->WriteLine(data);
2092                                 if (*u->second->oper)
2093                                 {
2094                                         snprintf(data,MAXBUF,":%s OPERTYPE %s", u->second->nick, u->second->oper);
2095                                         this->WriteLine(data);
2096                                 }
2097                                 if (*u->second->awaymsg)
2098                                 {
2099                                         snprintf(data,MAXBUF,":%s AWAY :%s", u->second->nick, u->second->awaymsg);
2100                                         this->WriteLine(data);
2101                                 }
2102                                 FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)Utils->Creator,(void*)this));
2103                                 list.clear();
2104                                 u->second->GetExtList(list);
2105                                 for (unsigned int j = 0; j < list.size(); j++)
2106                                 {
2107                                         FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)Utils->Creator,(void*)this,list[j]));
2108                                 }
2109                         }
2110                 }
2111         }
2112
2113         /** This function is called when we want to send a netburst to a local
2114          * server. There is a set order we must do this, because for example
2115          * users require their servers to exist, and channels require their
2116          * users to exist. You get the idea.
2117          */
2118         void DoBurst(TreeServer* s)
2119         {
2120                 std::string burst = "BURST "+ConvToStr(Instance->Time(true));
2121                 std::string endburst = "ENDBURST";
2122                 // Because by the end of the netburst, it  could be gone!
2123                 std::string name = s->GetName();
2124                 this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2"+name+"\2.");
2125                 this->WriteLine(burst);
2126                 /* send our version string */
2127                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
2128                 /* Send server tree */
2129                 this->SendServers(Utils->TreeRoot,s,1);
2130                 /* Send users and their oper status */
2131                 this->SendUsers(s);
2132                 /* Send everything else (channel modes, xlines etc) */
2133                 this->SendChannelModes(s);
2134                 this->SendXLines(s);
2135                 FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)Utils->Creator,(void*)this));
2136                 this->WriteLine(endburst);
2137                 this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
2138         }
2139
2140         /** This function is called when we receive data from a remote
2141          * server. We buffer the data in a std::string (it doesnt stay
2142          * there for long), reading using InspSocket::Read() which can
2143          * read up to 16 kilobytes in one operation.
2144          *
2145          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
2146          * THE SOCKET OBJECT FOR US.
2147          */
2148         virtual bool OnDataReady()
2149         {
2150                 char* data = this->Read();
2151                 /* Check that the data read is a valid pointer and it has some content */
2152                 if (data && *data)
2153                 {
2154                         this->in_buffer.append(data);
2155                         /* While there is at least one new line in the buffer,
2156                          * do something useful (we hope!) with it.
2157                          */
2158                         while (in_buffer.find("\n") != std::string::npos)
2159                         {
2160                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
2161                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
2162                                 /* Use rfind here not find, as theres more
2163                                  * chance of the \r being near the end of the
2164                                  * string, not the start.
2165                                  */
2166                                 if (ret.find("\r") != std::string::npos)
2167                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
2168                                 /* Process this one, abort if it
2169                                  * didnt return true.
2170                                  */
2171                                 if (!this->ProcessLine(ret))
2172                                 {
2173                                         return false;
2174                                 }
2175                         }
2176                         return true;
2177                 }
2178                 /* EAGAIN returns an empty but non-NULL string, so this
2179                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
2180                  */
2181                 return (data && !*data);
2182         }
2183
2184         int WriteLine(std::string line)
2185         {
2186                 Instance->Log(DEBUG,"OUT: %s",line.c_str());
2187                 line.append("\r\n");
2188                 return this->Write(line);
2189         }
2190
2191         /* Handle ERROR command */
2192         bool Error(std::deque<std::string> &params)
2193         {
2194                 if (params.size() < 1)
2195                         return false;
2196                 this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
2197                 /* we will return false to cause the socket to close. */
2198                 return false;
2199         }
2200
2201         /** remote MOTD. leet, huh? */
2202         bool Motd(const std::string &prefix, std::deque<std::string> &params)
2203         {
2204                 if (params.size() > 0)
2205                 {
2206                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2207                         {
2208                                 /* It's for our server */
2209                                 string_list results;
2210                                 userrec* source = this->Instance->FindNick(prefix);
2211
2212                                 if (source)
2213                                 {
2214                                         std::deque<std::string> par;
2215                                         par.push_back(prefix);
2216                                         par.push_back("");
2217
2218                                         if (!Instance->Config->MOTD.size())
2219                                         {
2220                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
2221                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2222                                                 return true;
2223                                         }
2224
2225                                         par[1] = std::string("::")+Instance->Config->ServerName+" 375 "+source->nick+" :"+Instance->Config->ServerName+" message of the day";
2226                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2227
2228                                         for (unsigned int i = 0; i < Instance->Config->MOTD.size(); i++)
2229                                         {
2230                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 372 "+source->nick+" :- "+Instance->Config->MOTD[i];
2231                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2232                                         }
2233
2234                                         par[1] = std::string("::")+Instance->Config->ServerName+" 376 "+source->nick+" End of message of the day.";
2235                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2236                                 }
2237                         }
2238                         else
2239                         {
2240                                 /* Pass it on */
2241                                 userrec* source = this->Instance->FindNick(prefix);
2242                                 if (source)
2243                                         Utils->DoOneToOne(prefix, "MOTD", params, params[0]);
2244                         }
2245                 }
2246                 return true;
2247         }
2248
2249         /** remote ADMIN. leet, huh? */
2250         bool Admin(const std::string &prefix, std::deque<std::string> &params)
2251         {
2252                 if (params.size() > 0)
2253                 {
2254                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2255                         {
2256                                 /* It's for our server */
2257                                 string_list results;
2258                                 userrec* source = this->Instance->FindNick(prefix);
2259
2260                                 if (source)
2261                                 {
2262                                         std::deque<std::string> par;
2263                                         par.push_back(prefix);
2264                                         par.push_back("");
2265
2266                                         par[1] = std::string("::")+Instance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+Instance->Config->ServerName;
2267                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2268
2269                                         par[1] = std::string("::")+Instance->Config->ServerName+" 257 "+source->nick+" :Name     - "+Instance->Config->AdminName;
2270                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2271
2272                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+Instance->Config->AdminNick;
2273                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2274
2275                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+Instance->Config->AdminEmail;
2276                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2277                                 }
2278                         }
2279                         else
2280                         {
2281                                 /* Pass it on */
2282                                 userrec* source = this->Instance->FindNick(prefix);
2283                                 if (source)
2284                                         Utils->DoOneToOne(prefix, "ADMIN", params, params[0]);
2285                         }
2286                 }
2287                 return true;
2288         }
2289
2290         bool Stats(const std::string &prefix, std::deque<std::string> &params)
2291         {
2292                 /* Get the reply to a STATS query if it matches this servername,
2293                  * and send it back as a load of PUSH queries
2294                  */
2295                 if (params.size() > 1)
2296                 {
2297                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
2298                         {
2299                                 /* It's for our server */
2300                                 string_list results;
2301                                 userrec* source = this->Instance->FindNick(prefix);
2302                                 if (source)
2303                                 {
2304                                         std::deque<std::string> par;
2305                                         par.push_back(prefix);
2306                                         par.push_back("");
2307                                         DoStats(this->Instance, *(params[0].c_str()), source, results);
2308                                         for (size_t i = 0; i < results.size(); i++)
2309                                         {
2310                                                 par[1] = "::" + results[i];
2311                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2312                                         }
2313                                 }
2314                         }
2315                         else
2316                         {
2317                                 /* Pass it on */
2318                                 userrec* source = this->Instance->FindNick(prefix);
2319                                 if (source)
2320                                         Utils->DoOneToOne(prefix, "STATS", params, params[1]);
2321                         }
2322                 }
2323                 return true;
2324         }
2325
2326
2327         /** Because the core won't let users or even SERVERS set +o,
2328          * we use the OPERTYPE command to do this.
2329          */
2330         bool OperType(const std::string &prefix, std::deque<std::string> &params)
2331         {
2332                 if (params.size() != 1)
2333                 {
2334                         Instance->Log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
2335                         return true;
2336                 }
2337                 std::string opertype = params[0];
2338                 userrec* u = this->Instance->FindNick(prefix);
2339                 if (u)
2340                 {
2341                         u->modes[UM_OPERATOR] = 1;
2342                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
2343                         Utils->DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
2344                 }
2345                 return true;
2346         }
2347
2348         /** Because Andy insists that services-compatible servers must
2349          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
2350          */
2351         bool ForceNick(const std::string &prefix, std::deque<std::string> &params)
2352         {
2353                 if (params.size() < 3)
2354                         return true;
2355
2356                 userrec* u = this->Instance->FindNick(params[0]);
2357
2358                 if (u)
2359                 {
2360                         Utils->DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
2361                         if (IS_LOCAL(u))
2362                         {
2363                                 std::deque<std::string> par;
2364                                 par.push_back(params[1]);
2365                                 /* This is not required as one is sent in OnUserPostNick below
2366                                  */
2367                                 //Utils->DoOneToMany(u->nick,"NICK",par);
2368                                 if (!u->ForceNickChange(params[1].c_str()))
2369                                 {
2370                                         userrec::QuitUser(this->Instance, u, "Nickname collision");
2371                                         return true;
2372                                 }
2373                                 u->age = atoi(params[2].c_str());
2374                         }
2375                 }
2376                 return true;
2377         }
2378
2379         /*
2380          * Remote SQUIT (RSQUIT). Routing works similar to SVSNICK: Route it to the server that the target is connected to locally,
2381          * then let that server do the dirty work (squit it!). Example:
2382          * 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
2383          */
2384         bool RemoteSquit(const std::string &prefix, std::deque<std::string> &params)
2385         {
2386                 /* ok.. :w00t RSQUIT jupe.barafranca.com :reason here */
2387                 if (params.size() < 2)
2388                         return true;
2389
2390                 TreeServer* s = Utils->FindServerMask(params[0]);
2391
2392                 if (s)
2393                 {
2394                         if (s == Utils->TreeRoot)
2395                         {
2396                                 this->Instance->SNO->WriteToSnoMask('l',"What the fuck, I recieved a remote SQUIT for myself? :< (from %s", prefix.c_str());
2397                                 return true;
2398                         }
2399
2400                         TreeSocket* sock = s->GetSocket();
2401
2402                         if (sock)
2403                         {
2404                                 /* it's locally connected, KILL IT! */
2405                                 Instance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
2406                                 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());
2407                                 sock->Squit(s,"Server quit by " + prefix + ": " + params[1]);
2408                                 Instance->SE->DelFd(sock);
2409                                 sock->Close();
2410                                 delete sock;
2411                         }
2412                         else
2413                         {
2414                                 /* route the rsquit */
2415                                 params[1] = ":" + params[1];
2416                                 Utils->DoOneToOne(prefix, "RSQUIT", params, params[0]);
2417                         }
2418                 }
2419                 else
2420                 {
2421                         /* mother fucker! it doesn't exist */
2422                 }
2423
2424                 return true;
2425         }
2426
2427         bool ServiceJoin(const std::string &prefix, std::deque<std::string> &params)
2428         {
2429                 if (params.size() < 2)
2430                         return true;
2431
2432                 userrec* u = this->Instance->FindNick(params[0]);
2433
2434                 if (u)
2435                 {
2436                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false);
2437                         Utils->DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
2438                 }
2439                 return true;
2440         }
2441
2442         bool RemoteRehash(const std::string &prefix, std::deque<std::string> &params)
2443         {
2444                 if (params.size() < 1)
2445                         return false;
2446
2447                 std::string servermask = params[0];
2448
2449                 if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
2450                 {
2451                         this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated from server \002"+prefix+"\002.");
2452                         this->Instance->RehashServer();
2453                         Utils->ReadConfiguration(false);
2454                         InitializeDisabledCommands(Instance->Config->DisabledCommands, Instance);
2455                 }
2456                 Utils->DoOneToAllButSender(prefix,"REHASH",params,prefix);
2457                 return true;
2458         }
2459
2460         bool RemoteKill(const std::string &prefix, std::deque<std::string> &params)
2461         {
2462                 if (params.size() != 2)
2463                         return true;
2464
2465                 std::string nick = params[0];
2466                 userrec* u = this->Instance->FindNick(prefix);
2467                 userrec* who = this->Instance->FindNick(nick);
2468
2469                 if (who)
2470                 {
2471                         /* Prepend kill source, if we don't have one */
2472                         std::string sourceserv = prefix;
2473                         if (u)
2474                         {
2475                                 sourceserv = u->server;
2476                         }
2477                         if (*(params[1].c_str()) != '[')
2478                         {
2479                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
2480                         }
2481                         std::string reason = params[1];
2482                         params[1] = ":" + params[1];
2483                         Utils->DoOneToAllButSender(prefix,"KILL",params,sourceserv);
2484                         who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
2485                         userrec::QuitUser(this->Instance,who,reason);
2486                 }
2487                 return true;
2488         }
2489
2490         bool LocalPong(const std::string &prefix, std::deque<std::string> &params)
2491         {
2492                 if (params.size() < 1)
2493                         return true;
2494
2495                 if (params.size() == 1)
2496                 {
2497                         TreeServer* ServerSource = Utils->FindServer(prefix);
2498                         if (ServerSource)
2499                         {
2500                                 ServerSource->SetPingFlag();
2501                         }
2502                 }
2503                 else
2504                 {
2505                         std::string forwardto = params[1];
2506                         if (forwardto == this->Instance->Config->ServerName)
2507                         {
2508                                 /*
2509                                  * this is a PONG for us
2510                                  * if the prefix is a user, check theyre local, and if they are,
2511                                  * dump the PONG reply back to their fd. If its a server, do nowt.
2512                                  * Services might want to send these s->s, but we dont need to yet.
2513                                  */
2514                                 userrec* u = this->Instance->FindNick(prefix);
2515
2516                                 if (u)
2517                                 {
2518                                         u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
2519                                 }
2520                         }
2521                         else
2522                         {
2523                                 // not for us, pass it on :)
2524                                 Utils->DoOneToOne(prefix,"PONG",params,forwardto);
2525                         }
2526                 }
2527
2528                 return true;
2529         }
2530
2531         bool MetaData(const std::string &prefix, std::deque<std::string> &params)
2532         {
2533                 if (params.size() < 3)
2534                         return true;
2535
2536                 TreeServer* ServerSource = Utils->FindServer(prefix);
2537
2538                 if (ServerSource)
2539                 {
2540                         if (params[0] == "*")
2541                         {
2542                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
2543                         }
2544                         else if (*(params[0].c_str()) == '#')
2545                         {
2546                                 chanrec* c = this->Instance->FindChan(params[0]);
2547                                 if (c)
2548                                 {
2549                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
2550                                 }
2551                         }
2552                         else if (*(params[0].c_str()) != '#')
2553                         {
2554                                 userrec* u = this->Instance->FindNick(params[0]);
2555                                 if (u)
2556                                 {
2557                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
2558                                 }
2559                         }
2560                 }
2561
2562                 params[2] = ":" + params[2];
2563                 Utils->DoOneToAllButSender(prefix,"METADATA",params,prefix);
2564                 return true;
2565         }
2566
2567         bool ServerVersion(const std::string &prefix, std::deque<std::string> &params)
2568         {
2569                 if (params.size() < 1)
2570                         return true;
2571
2572                 TreeServer* ServerSource = Utils->FindServer(prefix);
2573
2574                 if (ServerSource)
2575                 {
2576                         ServerSource->SetVersion(params[0]);
2577                 }
2578                 params[0] = ":" + params[0];
2579                 Utils->DoOneToAllButSender(prefix,"VERSION",params,prefix);
2580                 return true;
2581         }
2582
2583         bool ChangeHost(const std::string &prefix, std::deque<std::string> &params)
2584         {
2585                 if (params.size() < 1)
2586                         return true;
2587
2588                 userrec* u = this->Instance->FindNick(prefix);
2589
2590                 if (u)
2591                 {
2592                         u->ChangeDisplayedHost(params[0].c_str());
2593                         Utils->DoOneToAllButSender(prefix,"FHOST",params,u->server);
2594                 }
2595                 return true;
2596         }
2597
2598         bool AddLine(const std::string &prefix, std::deque<std::string> &params)
2599         {
2600                 if (params.size() < 6)
2601                         return true;
2602
2603                 bool propogate = false;
2604
2605                 switch (*(params[0].c_str()))
2606                 {
2607                         case 'Z':
2608                                 propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2609                                 Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2610                         break;
2611                         case 'Q':
2612                                 propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2613                                 Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2614                         break;
2615                         case 'E':
2616                                 propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2617                                 Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2618                         break;
2619                         case 'G':
2620                                 propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2621                                 Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2622                         break;
2623                         case 'K':
2624                                 propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2625                         break;
2626                         default:
2627                                 /* Just in case... */
2628                                 this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
2629                                 propogate = false;
2630                         break;
2631                 }
2632
2633                 /* Send it on its way */
2634                 if (propogate)
2635                 {
2636                         if (atoi(params[4].c_str()))
2637                         {
2638                                 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());
2639                         }
2640                         else
2641                         {
2642                                 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());
2643                         }
2644                         params[5] = ":" + params[5];
2645                         Utils->DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
2646                 }
2647                 if (!this->bursting)
2648                 {
2649                         Instance->Log(DEBUG,"Applying lines...");
2650                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2651                 }
2652                 return true;
2653         }
2654
2655         bool ChangeName(const std::string &prefix, std::deque<std::string> &params)
2656         {
2657                 if (params.size() < 1)
2658                         return true;
2659
2660                 userrec* u = this->Instance->FindNick(prefix);
2661
2662                 if (u)
2663                 {
2664                         u->ChangeName(params[0].c_str());
2665                         params[0] = ":" + params[0];
2666                         Utils->DoOneToAllButSender(prefix,"FNAME",params,u->server);
2667                 }
2668                 return true;
2669         }
2670
2671         bool Whois(const std::string &prefix, std::deque<std::string> &params)
2672         {
2673                 if (params.size() < 1)
2674                         return true;
2675
2676                 Instance->Log(DEBUG,"In IDLE command");
2677                 userrec* u = this->Instance->FindNick(prefix);
2678
2679                 if (u)
2680                 {
2681                         Instance->Log(DEBUG,"USER EXISTS: %s",u->nick);
2682                         // an incoming request
2683                         if (params.size() == 1)
2684                         {
2685                                 userrec* x = this->Instance->FindNick(params[0]);
2686                                 if ((x) && (IS_LOCAL(x)))
2687                                 {
2688                                         userrec* x = this->Instance->FindNick(params[0]);
2689                                         char signon[MAXBUF];
2690                                         char idle[MAXBUF];
2691
2692                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
2693                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-Instance->Time(true)));
2694                                         std::deque<std::string> par;
2695                                         par.push_back(prefix);
2696                                         par.push_back(signon);
2697                                         par.push_back(idle);
2698                                         // ours, we're done, pass it BACK
2699                                         Utils->DoOneToOne(params[0],"IDLE",par,u->server);
2700                                 }
2701                                 else
2702                                 {
2703                                         // not ours pass it on
2704                                         Utils->DoOneToOne(prefix,"IDLE",params,x->server);
2705                                 }
2706                         }
2707                         else if (params.size() == 3)
2708                         {
2709                                 std::string who_did_the_whois = params[0];
2710                                 userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
2711                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2712                                 {
2713                                         // an incoming reply to a whois we sent out
2714                                         std::string nick_whoised = prefix;
2715                                         unsigned long signon = atoi(params[1].c_str());
2716                                         unsigned long idle = atoi(params[2].c_str());
2717                                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2718                                                 do_whois(this->Instance,who_to_send_to,u,signon,idle,nick_whoised.c_str());
2719                                 }
2720                                 else
2721                                 {
2722                                         // not ours, pass it on
2723                                         Utils->DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
2724                                 }
2725                         }
2726                 }
2727                 return true;
2728         }
2729
2730         bool Push(const std::string &prefix, std::deque<std::string> &params)
2731         {
2732                 if (params.size() < 2)
2733                         return true;
2734
2735                 userrec* u = this->Instance->FindNick(params[0]);
2736
2737                 if (!u)
2738                         return true;
2739
2740                 if (IS_LOCAL(u))
2741                 {
2742                         u->Write(params[1]);
2743                 }
2744                 else
2745                 {
2746                         // continue the raw onwards
2747                         params[1] = ":" + params[1];
2748                         Utils->DoOneToOne(prefix,"PUSH",params,u->server);
2749                 }
2750                 return true;
2751         }
2752
2753         bool HandleSetTime(const std::string &prefix, std::deque<std::string> &params)
2754         {
2755                 if (!params.size() || !Utils->EnableTimeSync)
2756                         return true;
2757
2758                 bool force = false;
2759
2760                 if ((params.size() == 2) && (params[1] == "FORCE"))
2761                         force = true;
2762
2763                 time_t rts = atoi(params[0].c_str());
2764                 time_t us = Instance->Time(true);
2765
2766                 if (rts == us)
2767                 {
2768                         Instance->Log(DEBUG, "Timestamp from %s is equal", prefix.c_str());
2769
2770                         Utils->DoOneToAllButSender(prefix, "TIMESET", params, prefix);
2771                 }
2772                 else if (force || (rts < us))
2773                 {
2774                         int old = Instance->SetTimeDelta(rts - us);
2775                         Instance->Log(DEBUG, "%s TS (diff %d) from %s applied (old delta was %d)", (force) ? "Forced" : "Lower", rts - us, prefix.c_str(), old);
2776
2777                         Utils->DoOneToAllButSender(prefix, "TIMESET", params, prefix);
2778                 }
2779                 else
2780                 {
2781                         Instance->Log(DEBUG, "Higher TS (diff %d) from %s overridden", us - rts, prefix.c_str());
2782
2783                         std::deque<std::string> oparams;
2784                         oparams.push_back(ConvToStr(us));
2785
2786                         Utils->DoOneToMany(prefix, "TIMESET", oparams);
2787                 }
2788
2789                 return true;
2790         }
2791
2792         bool Time(const std::string &prefix, std::deque<std::string> &params)
2793         {
2794                 // :source.server TIME remote.server sendernick
2795                 // :remote.server TIME source.server sendernick TS
2796                 if (params.size() == 2)
2797                 {
2798                         // someone querying our time?
2799                         if (this->Instance->Config->ServerName == params[0])
2800                         {
2801                                 userrec* u = this->Instance->FindNick(params[1]);
2802                                 if (u)
2803                                 {
2804                                         params.push_back(ConvToStr(Instance->Time(false)));
2805                                         params[0] = prefix;
2806                                         Utils->DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
2807                                 }
2808                         }
2809                         else
2810                         {
2811                                 // not us, pass it on
2812                                 userrec* u = this->Instance->FindNick(params[1]);
2813                                 if (u)
2814                                         Utils->DoOneToOne(prefix,"TIME",params,params[0]);
2815                         }
2816                 }
2817                 else if (params.size() == 3)
2818                 {
2819                         // a response to a previous TIME
2820                         userrec* u = this->Instance->FindNick(params[1]);
2821                         if ((u) && (IS_LOCAL(u)))
2822                         {
2823                         time_t rawtime = atol(params[2].c_str());
2824                         struct tm * timeinfo;
2825                         timeinfo = localtime(&rawtime);
2826                                 char tms[26];
2827                                 snprintf(tms,26,"%s",asctime(timeinfo));
2828                                 tms[24] = 0;
2829                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
2830                         }
2831                         else
2832                         {
2833                                 if (u)
2834                                         Utils->DoOneToOne(prefix,"TIME",params,u->server);
2835                         }
2836                 }
2837                 return true;
2838         }
2839
2840         bool LocalPing(const std::string &prefix, std::deque<std::string> &params)
2841         {
2842                 if (params.size() < 1)
2843                         return true;
2844
2845                 if (params.size() == 1)
2846                 {
2847                         std::string stufftobounce = params[0];
2848                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
2849                         return true;
2850                 }
2851                 else
2852                 {
2853                         std::string forwardto = params[1];
2854                         if (forwardto == this->Instance->Config->ServerName)
2855                         {
2856                                 // this is a ping for us, send back PONG to the requesting server
2857                                 params[1] = params[0];
2858                                 params[0] = forwardto;
2859                                 Utils->DoOneToOne(forwardto,"PONG",params,params[1]);
2860                         }
2861                         else
2862                         {
2863                                 // not for us, pass it on :)
2864                                 Utils->DoOneToOne(prefix,"PING",params,forwardto);
2865                         }
2866                         return true;
2867                 }
2868         }
2869
2870         bool RemoveStatus(const std::string &prefix, std::deque<std::string> &params)
2871         {
2872                 if (params.size() < 1)
2873                         return true;
2874
2875                 chanrec* c = Instance->FindChan(params[0]);
2876
2877                 if (c)
2878                 {
2879                         irc::modestacker modestack(false);
2880                         CUList *ulist = c->GetUsers();
2881                         const char* y[127];
2882                         std::deque<std::string> stackresult;
2883                         std::string x;
2884
2885                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
2886                         {
2887                                 std::string modesequence = Instance->Modes->ModeString(i->second, c);
2888                                 if (modesequence.length())
2889                                 {
2890                                         Instance->Log(DEBUG,"Mode sequence = '%s'",modesequence.c_str());
2891                                         irc::spacesepstream sep(modesequence);
2892                                         std::string modeletters = sep.GetToken();
2893                                         Instance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2894
2895                                         while (!modeletters.empty())
2896                                         {
2897                                                 char mletter = *(modeletters.begin());
2898                                                 modestack.Push(mletter,sep.GetToken());
2899                                                 Instance->Log(DEBUG,"Push letter = '%c'",mletter);
2900                                                 modeletters.erase(modeletters.begin());
2901                                                 Instance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2902                                         }
2903                                 }
2904                         }
2905
2906                         while (modestack.GetStackedLine(stackresult))
2907                         {
2908                                 Instance->Log(DEBUG,"Stacked line size %d",stackresult.size());
2909                                 stackresult.push_front(ConvToStr(c->age));
2910                                 stackresult.push_front(c->name);
2911                                 Utils->DoOneToMany(Instance->Config->ServerName, "FMODE", stackresult);
2912                                 stackresult.erase(stackresult.begin() + 1);
2913                                 Instance->Log(DEBUG,"Stacked items:");
2914                                 for (size_t z = 0; z < stackresult.size(); z++)
2915                                 {
2916                                         y[z] = stackresult[z].c_str();
2917                                         Instance->Log(DEBUG,"\tstackresult[%d]='%s'",z,stackresult[z].c_str());
2918                                 }
2919                                 userrec* n = new userrec(Instance);
2920                                 n->SetFd(FD_MAGIC_NUMBER);
2921                                 Instance->SendMode(y, stackresult.size(), n);
2922                                 delete n;
2923                         }
2924                 }
2925                 return true;
2926         }
2927
2928         bool RemoteServer(const std::string &prefix, std::deque<std::string> &params)
2929         {
2930                 if (params.size() < 4)
2931                         return false;
2932
2933                 std::string servername = params[0];
2934                 std::string password = params[1];
2935                 // hopcount is not used for a remote server, we calculate this ourselves
2936                 std::string description = params[3];
2937                 TreeServer* ParentOfThis = Utils->FindServer(prefix);
2938
2939                 if (!ParentOfThis)
2940                 {
2941                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2942                         return false;
2943                 }
2944                 TreeServer* CheckDupe = Utils->FindServer(servername);
2945                 if (CheckDupe)
2946                 {
2947                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2948                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+servername+"\2 denied, already exists");
2949                         return false;
2950                 }
2951                 TreeServer* Node = new TreeServer(this->Utils,this->Instance,servername,description,ParentOfThis,NULL);
2952                 ParentOfThis->AddChild(Node);
2953                 params[3] = ":" + params[3];
2954                 Utils->DoOneToAllButSender(prefix,"SERVER",params,prefix);
2955                 this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2956                 return true;
2957         }
2958
2959         bool Outbound_Reply_Server(std::deque<std::string> &params)
2960         {
2961                 if (params.size() < 4)
2962                         return false;
2963
2964                 irc::string servername = params[0].c_str();
2965                 std::string sname = params[0];
2966                 std::string password = params[1];
2967                 int hops = atoi(params[2].c_str());
2968
2969                 if (hops)
2970                 {
2971                         this->WriteLine("ERROR :Server too far away for authentication");
2972                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2973                         return false;
2974                 }
2975                 std::string description = params[3];
2976                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
2977                 {
2978                         if ((x->Name == servername) && (x->RecvPass == password))
2979                         {
2980                                 TreeServer* CheckDupe = Utils->FindServer(sname);
2981                                 if (CheckDupe)
2982                                 {
2983                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2984                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2985                                         return false;
2986                                 }
2987                                 // Begin the sync here. this kickstarts the
2988                                 // other side, waiting in WAIT_AUTH_2 state,
2989                                 // into starting their burst, as it shows
2990                                 // that we're happy.
2991                                 this->LinkState = CONNECTED;
2992                                 // we should add the details of this server now
2993                                 // to the servers tree, as a child of the root
2994                                 // node.
2995                                 TreeServer* Node = new TreeServer(this->Utils,this->Instance,sname,description,Utils->TreeRoot,this);
2996                                 Utils->TreeRoot->AddChild(Node);
2997                                 params[3] = ":" + params[3];
2998                                 Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,sname);
2999                                 this->bursting = true;
3000                                 this->DoBurst(Node);
3001                                 return true;
3002                         }
3003                 }
3004                 this->WriteLine("ERROR :Invalid credentials");
3005                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
3006                 return false;
3007         }
3008
3009         bool Inbound_Server(std::deque<std::string> &params)
3010         {
3011                 if (params.size() < 4)
3012                         return false;
3013
3014                 irc::string servername = params[0].c_str();
3015                 std::string sname = params[0];
3016                 std::string password = params[1];
3017                 int hops = atoi(params[2].c_str());
3018
3019                 if (hops)
3020                 {
3021                         this->WriteLine("ERROR :Server too far away for authentication");
3022                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
3023                         return false;
3024                 }
3025                 std::string description = params[3];
3026                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
3027                 {
3028                         if ((x->Name == servername) && (x->RecvPass == password))
3029                         {
3030                                 TreeServer* CheckDupe = Utils->FindServer(sname);
3031                                 if (CheckDupe)
3032                                 {
3033                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
3034                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
3035                                         return false;
3036                                 }
3037                                 this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
3038
3039                                 if (this->Hook)
3040                                 {
3041                                         std::string name = InspSocketNameRequest((Module*)Utils->Creator, this->Hook).Send();
3042                                         this->Instance->SNO->WriteToSnoMask('l',"Connection from \2"+sname+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] using transport \2"+name+"\2");
3043                                 }
3044
3045                                 this->InboundServerName = sname;
3046                                 this->InboundDescription = description;
3047                                 // this is good. Send our details: Our server name and description and hopcount of 0,
3048                                 // along with the sendpass from this block.
3049                                 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
3050                                 // move to the next state, we are now waiting for THEM.
3051                                 this->LinkState = WAIT_AUTH_2;
3052                                 return true;
3053                         }
3054                 }
3055                 this->WriteLine("ERROR :Invalid credentials");
3056                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
3057                 return false;
3058         }
3059
3060         void Split(const std::string &line, std::deque<std::string> &n)
3061         {
3062                 n.clear();
3063                 irc::tokenstream tokens(line);
3064                 std::string param;
3065                 while ((param = tokens.GetToken()) != "")
3066                         n.push_back(param);
3067                 return;
3068         }
3069
3070         bool ProcessLine(std::string &line)
3071         {
3072                 std::deque<std::string> params;
3073                 irc::string command;
3074                 std::string prefix;
3075
3076                 line = line.substr(0, line.find_first_of("\r\n"));
3077
3078                 if (line.empty())
3079                         return true;
3080
3081                 Instance->Log(DEBUG,"IN: %s", line.c_str());
3082
3083                 this->Split(line.c_str(),params);
3084
3085                 if ((params[0][0] == ':') && (params.size() > 1))
3086                 {
3087                         prefix = params[0].substr(1);
3088                         params.pop_front();
3089                 }
3090
3091                 command = params[0].c_str();
3092                 params.pop_front();
3093
3094                 switch (this->LinkState)
3095                 {
3096                         TreeServer* Node;
3097
3098                         case WAIT_AUTH_1:
3099                                 // Waiting for SERVER command from remote server. Server initiating
3100                                 // the connection sends the first SERVER command, listening server
3101                                 // replies with theirs if its happy, then if the initiator is happy,
3102                                 // it starts to send its net sync, which starts the merge, otherwise
3103                                 // it sends an ERROR.
3104                                 if (command == "PASS")
3105                                 {
3106                                         /* Silently ignored */
3107                                 }
3108                                 else if (command == "SERVER")
3109                                 {
3110                                         return this->Inbound_Server(params);
3111                                 }
3112                                 else if (command == "ERROR")
3113                                 {
3114                                         return this->Error(params);
3115                                 }
3116                                 else if (command == "USER")
3117                                 {
3118                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
3119                                         return false;
3120                                 }
3121                                 else if (command == "CAPAB")
3122                                 {
3123                                         return this->Capab(params);
3124                                 }
3125                                 else if ((command == "U") || (command == "S"))
3126                                 {
3127                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3128                                         return false;
3129                                 }
3130                                 else
3131                                 {
3132                                         std::string error("ERROR :Invalid command in negotiation phase: ");
3133                                         error.append(command.c_str());
3134                                         this->WriteLine(error);
3135                                         return false;
3136                                 }
3137                         break;
3138                         case WAIT_AUTH_2:
3139                                 // Waiting for start of other side's netmerge to say they liked our
3140                                 // password.
3141                                 if (command == "SERVER")
3142                                 {
3143                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
3144                                         // silently ignore.
3145                                         return true;
3146                                 }
3147                                 else if ((command == "U") || (command == "S"))
3148                                 {
3149                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3150                                         return false;
3151                                 }
3152                                 else if (command == "BURST")
3153                                 {
3154                                         if (params.size() && Utils->EnableTimeSync)
3155                                         {
3156                                                 /* If a time stamp is provided, apply synchronization */
3157                                                 bool force = false;
3158                                                 time_t them = atoi(params[0].c_str());
3159                                                 time_t us = Instance->Time(true);
3160                                                 int delta = them - us;
3161
3162                                                 if ((params.size() == 2) && (params[1] == "FORCE"))
3163                                                         force = true;
3164
3165                                                 if ((delta < -600) || (delta > 600))
3166                                                 {
3167                                                         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));
3168                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
3169                                                         return false;
3170                                                 }
3171
3172                                                 if (us == them)
3173                                                 {
3174                                                         this->Instance->Log(DEBUG, "Timestamps are equal; pat yourself on the back");
3175                                                 }
3176                                                 else if (force || (us > them))
3177                                                 {
3178                                                         this->Instance->Log(DEBUG, "Remote server has lower TS (%d seconds)", them - us);
3179                                                         this->Instance->SetTimeDelta(them - us);
3180                                                         // Send this new timestamp to any other servers
3181                                                         Utils->DoOneToMany(Utils->TreeRoot->GetName(), "TIMESET", params);
3182                                                 }
3183                                                 else
3184                                                 {
3185                                                         // Override the timestamp
3186                                                         this->Instance->Log(DEBUG, "We have a higher timestamp (by %d seconds), not updating delta", us - them);
3187                                                         this->WriteLine(":" + Utils->TreeRoot->GetName() + " TIMESET " + ConvToStr(us));
3188                                                 }
3189                                         }
3190                                         this->LinkState = CONNECTED;
3191                                         Node = new TreeServer(this->Utils,this->Instance,InboundServerName,InboundDescription,Utils->TreeRoot,this);
3192                                         Utils->TreeRoot->AddChild(Node);
3193                                         params.clear();
3194                                         params.push_back(InboundServerName);
3195                                         params.push_back("*");
3196                                         params.push_back("1");
3197                                         params.push_back(":"+InboundDescription);
3198                                         Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,InboundServerName);
3199                                         this->bursting = true;
3200                                         this->DoBurst(Node);
3201                                 }
3202                                 else if (command == "ERROR")
3203                                 {
3204                                         return this->Error(params);
3205                                 }
3206                                 else if (command == "CAPAB")
3207                                 {
3208                                         return this->Capab(params);
3209                                 }
3210
3211                         break;
3212                         case LISTENER:
3213                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
3214                                 return false;
3215                         break;
3216                         case CONNECTING:
3217                                 if (command == "SERVER")
3218                                 {
3219                                         // another server we connected to, which was in WAIT_AUTH_1 state,
3220                                         // has just sent us their credentials. If we get this far, theyre
3221                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
3222                                         // if we're happy with this, we should send our netburst which
3223                                         // kickstarts the merge.
3224                                         return this->Outbound_Reply_Server(params);
3225                                 }
3226                                 else if (command == "ERROR")
3227                                 {
3228                                         return this->Error(params);
3229                                 }
3230                         break;
3231                         case CONNECTED:
3232                                 // This is the 'authenticated' state, when all passwords
3233                                 // have been exchanged and anything past this point is taken
3234                                 // as gospel.
3235
3236                                 if (prefix != "")
3237                                 {
3238                                         std::string direction = prefix;
3239                                         userrec* t = this->Instance->FindNick(prefix);
3240                                         if (t)
3241                                         {
3242                                                 direction = t->server;
3243                                         }
3244                                         TreeServer* route_back_again = Utils->BestRouteTo(direction);
3245                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
3246                                         {
3247                                                 if (route_back_again)
3248                                                         Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
3249                                                 return true;
3250                                         }
3251
3252                                         /* Fix by brain:
3253                                          * When there is activity on the socket, reset the ping counter so
3254                                          * that we're not wasting bandwidth pinging an active server.
3255                                          */
3256                                         route_back_again->SetNextPingTime(time(NULL) + 60);
3257                                         route_back_again->SetPingFlag();
3258                                 }
3259
3260                                 if (command == "SVSMODE")
3261                                 {
3262                                         /* Services expects us to implement
3263                                          * SVSMODE. In inspircd its the same as
3264                                          * MODE anyway.
3265                                          */
3266                                         command = "MODE";
3267                                 }
3268                                 std::string target = "";
3269                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
3270                                  * working with std::string here.
3271                                  */
3272                                 if ((command == "NICK") && (params.size() > 1))
3273                                 {
3274                                         return this->IntroduceClient(prefix,params);
3275                                 }
3276                                 else if (command == "FJOIN")
3277                                 {
3278                                         return this->ForceJoin(prefix,params);
3279                                 }
3280                                 else if (command == "STATS")
3281                                 {
3282                                         return this->Stats(prefix, params);
3283                                 }
3284                                 else if (command == "MOTD")
3285                                 {
3286                                         return this->Motd(prefix, params);
3287                                 }
3288                                 else if (command == "ADMIN")
3289                                 {
3290                                         return this->Admin(prefix, params);
3291                                 }
3292                                 else if (command == "SERVER")
3293                                 {
3294                                         return this->RemoteServer(prefix,params);
3295                                 }
3296                                 else if (command == "ERROR")
3297                                 {
3298                                         return this->Error(params);
3299                                 }
3300                                 else if (command == "OPERTYPE")
3301                                 {
3302                                         return this->OperType(prefix,params);
3303                                 }
3304                                 else if (command == "FMODE")
3305                                 {
3306                                         return this->ForceMode(prefix,params);
3307                                 }
3308                                 else if (command == "KILL")
3309                                 {
3310                                         return this->RemoteKill(prefix,params);
3311                                 }
3312                                 else if (command == "FTOPIC")
3313                                 {
3314                                         return this->ForceTopic(prefix,params);
3315                                 }
3316                                 else if (command == "REHASH")
3317                                 {
3318                                         return this->RemoteRehash(prefix,params);
3319                                 }
3320                                 else if (command == "METADATA")
3321                                 {
3322                                         return this->MetaData(prefix,params);
3323                                 }
3324                                 else if (command == "REMSTATUS")
3325                                 {
3326                                         return this->RemoveStatus(prefix,params);
3327                                 }
3328                                 else if (command == "PING")
3329                                 {
3330                                         /*
3331                                          * We just got a ping from a server that's bursting.
3332                                          * This can't be right, so set them to not bursting, and
3333                                          * apply their lines.
3334                                          */
3335                                         if (this->bursting)
3336                                         {
3337                                                 this->bursting = false;
3338                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3339                                         }
3340                                         if (prefix == "")
3341                                         {
3342                                                 prefix = this->GetName();
3343                                         }
3344                                         return this->LocalPing(prefix,params);
3345                                 }
3346                                 else if (command == "PONG")
3347                                 {
3348                                         /*
3349                                          * We just got a pong from a server that's bursting.
3350                                          * This can't be right, so set them to not bursting, and
3351                                          * apply their lines.
3352                                          */
3353                                         if (this->bursting)
3354                                         {
3355                                                 this->bursting = false;
3356                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3357                                         }
3358                                         if (prefix == "")
3359                                         {
3360                                                 prefix = this->GetName();
3361                                         }
3362                                         return this->LocalPong(prefix,params);
3363                                 }
3364                                 else if (command == "VERSION")
3365                                 {
3366                                         return this->ServerVersion(prefix,params);
3367                                 }
3368                                 else if (command == "FHOST")
3369                                 {
3370                                         return this->ChangeHost(prefix,params);
3371                                 }
3372                                 else if (command == "FNAME")
3373                                 {
3374                                         return this->ChangeName(prefix,params);
3375                                 }
3376                                 else if (command == "ADDLINE")
3377                                 {
3378                                         return this->AddLine(prefix,params);
3379                                 }
3380                                 else if (command == "SVSNICK")
3381                                 {
3382                                         if (prefix == "")
3383                                         {
3384                                                 prefix = this->GetName();
3385                                         }
3386                                         return this->ForceNick(prefix,params);
3387                                 }
3388                                 else if (command == "RSQUIT")
3389                                 {
3390                                         return this->RemoteSquit(prefix, params);
3391                                 }
3392                                 else if (command == "IDLE")
3393                                 {
3394                                         return this->Whois(prefix,params);
3395                                 }
3396                                 else if (command == "PUSH")
3397                                 {
3398                                         return this->Push(prefix,params);
3399                                 }
3400                                 else if (command == "TIMESET")
3401                                 {
3402                                         return this->HandleSetTime(prefix, params);
3403                                 }
3404                                 else if (command == "TIME")
3405                                 {
3406                                         return this->Time(prefix,params);
3407                                 }
3408                                 else if ((command == "KICK") && (Utils->IsServer(prefix)))
3409                                 {
3410                                         std::string sourceserv = this->myhost;
3411                                         if (params.size() == 3)
3412                                         {
3413                                                 userrec* user = this->Instance->FindNick(params[1]);
3414                                                 chanrec* chan = this->Instance->FindChan(params[0]);
3415                                                 if (user && chan)
3416                                                 {
3417                                                         if (!chan->ServerKickUser(user, params[2].c_str(), false))
3418                                                                 /* Yikes, the channels gone! */
3419                                                                 delete chan;
3420                                                 }
3421                                         }
3422                                         if (this->InboundServerName != "")
3423                                         {
3424                                                 sourceserv = this->InboundServerName;
3425                                         }
3426                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3427                                 }
3428                                 else if (command == "SVSJOIN")
3429                                 {
3430                                         if (prefix == "")
3431                                         {
3432                                                 prefix = this->GetName();
3433                                         }
3434                                         return this->ServiceJoin(prefix,params);
3435                                 }
3436                                 else if (command == "SQUIT")
3437                                 {
3438                                         if (params.size() == 2)
3439                                         {
3440                                                 this->Squit(Utils->FindServer(params[0]),params[1]);
3441                                         }
3442                                         return true;
3443                                 }
3444                                 else if (command == "OPERNOTICE")
3445                                 {
3446                                         std::string sourceserv = this->myhost;
3447
3448                                         if (this->InboundServerName != "")
3449                                                 sourceserv = this->InboundServerName;
3450
3451                                         if (params.size() >= 1)
3452                                                 Instance->WriteOpers("*** From " + sourceserv + ": " + params[0]);
3453
3454                                         return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
3455                                 }
3456                                 else if (command == "MODENOTICE")
3457                                 {
3458                                         std::string sourceserv = this->myhost;
3459                                         if (this->InboundServerName != "")
3460                                                 sourceserv = this->InboundServerName;
3461                                         if (params.size() >= 2)
3462                                         {
3463                                                 Instance->WriteMode(params[0].c_str(), WM_AND, "*** From %s: %s", sourceserv.c_str(), params[1].c_str());
3464                                         }
3465
3466                                         return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
3467                                 }
3468                                 else if (command == "SNONOTICE")
3469                                 {
3470                                         std::string sourceserv = this->myhost;
3471                                         if (this->InboundServerName != "")
3472                                                 sourceserv = this->InboundServerName;
3473                                         if (params.size() >= 2)
3474                                         {
3475                                                 Instance->SNO->WriteToSnoMask(*(params[0].c_str()), "From " + sourceserv + ": "+ params[1]);
3476                                         }
3477
3478                                         return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
3479                                 }
3480                                 else if (command == "ENDBURST")
3481                                 {
3482                                         this->bursting = false;
3483                                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3484                                         std::string sourceserv = this->myhost;
3485                                         if (this->InboundServerName != "")
3486                                         {
3487                                                 sourceserv = this->InboundServerName;
3488                                         }
3489                                         this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
3490
3491                                         Event rmode((char*)sourceserv.c_str(), (Module*)Utils->Creator, "new_server");
3492                                         rmode.Send(Instance);
3493
3494                                         return true;
3495                                 }
3496                                 else
3497                                 {
3498                                         // not a special inter-server command.
3499                                         // Emulate the actual user doing the command,
3500                                         // this saves us having a huge ugly parser.
3501                                         userrec* who = this->Instance->FindNick(prefix);
3502                                         std::string sourceserv = this->myhost;
3503                                         if (this->InboundServerName != "")
3504                                         {
3505                                                 sourceserv = this->InboundServerName;
3506                                         }
3507                                         if ((!who) && (command == "MODE"))
3508                                         {
3509                                                 if (Utils->IsServer(prefix))
3510                                                 {
3511                                                         const char* modelist[127];
3512                                                         for (size_t i = 0; i < params.size(); i++)
3513                                                                 modelist[i] = params[i].c_str();
3514
3515                                                         userrec* fake = new userrec(Instance);
3516                                                         fake->SetFd(FD_MAGIC_NUMBER);
3517
3518                                                         this->Instance->SendMode(modelist, params.size(), fake);
3519
3520                                                         delete fake;
3521
3522                                                         /* Hot potato! pass it on! */
3523                                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3524                                                 }
3525                                         }
3526                                         if (who)
3527                                         {
3528                                                 if ((command == "NICK") && (params.size() > 0))
3529                                                 {
3530                                                         /* On nick messages, check that the nick doesnt
3531                                                          * already exist here. If it does, kill their copy,
3532                                                          * and our copy.
3533                                                          */
3534                                                         userrec* x = this->Instance->FindNick(params[0]);
3535                                                         if ((x) && (x != who))
3536                                                         {
3537                                                                 std::deque<std::string> p;
3538                                                                 p.push_back(params[0]);
3539                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
3540                                                                 Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3541                                                                 p.clear();
3542                                                                 p.push_back(prefix);
3543                                                                 p.push_back("Nickname collision");
3544                                                                 Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3545                                                                 userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
3546                                                                 userrec* y = this->Instance->FindNick(prefix);
3547                                                                 if (y)
3548                                                                 {
3549                                                                         userrec::QuitUser(this->Instance,y,"Nickname collision");
3550                                                                 }
3551                                                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3552                                                         }
3553                                                 }
3554                                                 // its a user
3555                                                 target = who->server;
3556                                                 const char* strparams[127];
3557                                                 for (unsigned int q = 0; q < params.size(); q++)
3558                                                 {
3559                                                         strparams[q] = params[q].c_str();
3560                                                 }
3561                                                 switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
3562                                                 {
3563                                                         case CMD_INVALID:
3564                                                                 this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
3565                                                                 return false;
3566                                                         break;
3567                                                         case CMD_FAILURE:
3568                                                                 return true;
3569                                                         break;
3570                                                         default:
3571                                                                 /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
3572                                                         break;
3573                                                 }
3574                                         }
3575                                         else
3576                                         {
3577                                                 // its not a user. Its either a server, or somethings screwed up.
3578                                                 if (Utils->IsServer(prefix))
3579                                                 {
3580                                                         target = this->Instance->Config->ServerName;
3581                                                 }
3582                                                 else
3583                                                 {
3584                                                         Instance->Log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
3585                                                         return true;
3586                                                 }
3587                                         }
3588                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3589
3590                                 }
3591                                 return true;
3592                         break;
3593                 }
3594                 return true;
3595         }
3596
3597         virtual std::string GetName()
3598         {
3599                 std::string sourceserv = this->myhost;
3600                 if (this->InboundServerName != "")
3601                 {
3602                         sourceserv = this->InboundServerName;
3603                 }
3604                 return sourceserv;
3605         }
3606
3607         virtual void OnTimeout()
3608         {
3609                 if (this->LinkState == CONNECTING)
3610                 {
3611                         this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out.");
3612                         Link* MyLink = Utils->FindLink(myhost);
3613                         if (MyLink)
3614                                 Utils->DoFailOver(MyLink);
3615                 }
3616         }
3617
3618         virtual void OnClose()
3619         {
3620                 // Connection closed.
3621                 // If the connection is fully up (state CONNECTED)
3622                 // then propogate a netsplit to all peers.
3623                 std::string quitserver = this->myhost;
3624                 if (this->InboundServerName != "")
3625                 {
3626                         quitserver = this->InboundServerName;
3627                 }
3628                 TreeServer* s = Utils->FindServer(quitserver);
3629                 if (s)
3630                 {
3631                         Squit(s,"Remote host closed the connection");
3632                 }
3633
3634                 if (quitserver != "")
3635                         this->Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' failed.",quitserver.c_str());
3636         }
3637
3638         virtual int OnIncomingConnection(int newsock, char* ip)
3639         {
3640                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
3641                  * or discovering if this port is the server port, we don't allow connections from any
3642                  * IPs for which we don't have a link block.
3643                  */
3644                 bool found = false;
3645
3646                 found = (std::find(Utils->ValidIPs.begin(), Utils->ValidIPs.end(), ip) != Utils->ValidIPs.end());
3647                 if (!found)
3648                 {
3649                         for (vector<std::string>::iterator i = Utils->ValidIPs.begin(); i != Utils->ValidIPs.end(); i++)
3650                                 if (irc::sockets::MatchCIDR(ip, (*i).c_str()))
3651                                         found = true;
3652
3653                         if (!found)
3654                         {
3655                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from %s denied (no link blocks with that IP address)", ip);
3656                                 close(newsock);
3657                                 return false;
3658                         }
3659                 }
3660
3661                 TreeSocket* s = new TreeSocket(this->Utils, this->Instance, newsock, ip, this->Hook);
3662
3663                 s = s; /* Whinge whinge whinge, thats all GCC ever does. */
3664                 return true;
3665         }
3666 };
3667
3668 /** This class is used to resolve server hostnames during /connect and autoconnect.
3669  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
3670  * resolver step first ourselves if we need it. This is totally nonblocking, and will
3671  * callback to OnLookupComplete or OnError when completed. Once it has completed we
3672  * will have an IP address which we can then use to continue our connection.
3673  */
3674 class ServernameResolver : public Resolver
3675 {
3676  private:
3677         /** A copy of the Link tag info for what we're connecting to.
3678          * We take a copy, rather than using a pointer, just in case the
3679          * admin takes the tag away and rehashes while the domain is resolving.
3680          */
3681         Link MyLink;
3682         SpanningTreeUtilities* Utils;
3683  public:
3684         ServernameResolver(Module* me, SpanningTreeUtilities* Util, InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD, me), MyLink(x), Utils(Util)
3685         {
3686                 /* Nothing in here, folks */
3687         }
3688
3689         void OnLookupComplete(const std::string &result)
3690         {
3691                 /* Initiate the connection, now that we have an IP to use.
3692                  * Passing a hostname directly to InspSocket causes it to
3693                  * just bail and set its FD to -1.
3694                  */
3695                 TreeServer* CheckDupe = Utils->FindServer(MyLink.Name.c_str());
3696                 if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
3697                 {
3698
3699                         if ((!MyLink.Hook.empty()) && (Utils->hooks.find(MyLink.Hook.c_str()) ==  Utils->hooks.end()))
3700                                 return;
3701
3702                         TreeSocket* newsocket = new TreeSocket(this->Utils, ServerInstance, result,MyLink.Port,false,MyLink.Timeout ? MyLink.Timeout : 10,MyLink.Name.c_str(),
3703                                         MyLink.Hook.empty() ? NULL : Utils->hooks[MyLink.Hook.c_str()]);
3704                         if (newsocket->GetFd() > -1)
3705                         {
3706                                 /* We're all OK */
3707                         }
3708                         else
3709                         {
3710                                 /* Something barfed, show the opers */
3711                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
3712                                 delete newsocket;
3713                                 Utils->DoFailOver(&MyLink);
3714                         }
3715                 }
3716         }
3717
3718         void OnError(ResolverError e, const std::string &errormessage)
3719         {
3720                 /* Ooops! */
3721                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
3722                 Utils->DoFailOver(&MyLink);
3723         }
3724 };
3725
3726 /** Handle resolving of server IPs for the cache
3727  */
3728 class SecurityIPResolver : public Resolver
3729 {
3730  private:
3731         Link MyLink;
3732         SpanningTreeUtilities* Utils;
3733  public:
3734         SecurityIPResolver(Module* me, SpanningTreeUtilities* U, InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD, me), MyLink(x), Utils(U)
3735         {
3736         }
3737
3738         void OnLookupComplete(const std::string &result)
3739         {
3740                 ServerInstance->Log(DEBUG,"Security IP cache: Adding IP address '%s' for Link '%s'",result.c_str(),MyLink.Name.c_str());
3741                 Utils->ValidIPs.push_back(result);
3742         }
3743
3744         void OnError(ResolverError e, const std::string &errormessage)
3745         {
3746                 ServerInstance->Log(DEBUG,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str());
3747         }
3748 };
3749
3750 SpanningTreeUtilities::SpanningTreeUtilities(InspIRCd* Instance, ModuleSpanningTree* C) : ServerInstance(Instance), Creator(C)
3751 {
3752         Bindings.clear();
3753
3754         this->TreeRoot = new TreeServer(this, ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc);
3755
3756         modulelist* ml = ServerInstance->FindInterface("InspSocketHook");
3757
3758         /* Did we find any modules? */
3759         if (ml)
3760         {
3761                 /* Yes, enumerate them all to find out the hook name */
3762                 for (modulelist::iterator m = ml->begin(); m != ml->end(); m++)
3763                 {
3764                         /* Make a request to it for its name, its implementing
3765                          * InspSocketHook so we know its safe to do this
3766                          */
3767                         std::string name = InspSocketNameRequest((Module*)Creator, *m).Send();
3768                         /* Build a map of them */
3769                         hooks[name.c_str()] = *m;
3770                         hooknames.push_back(name);
3771                         ServerInstance->Log(DEBUG, "Found InspSocketHook interface: '%s' -> '%08x'", name.c_str(), *m);
3772                 }
3773         }
3774
3775         this->ReadConfiguration(true);
3776 }
3777
3778 SpanningTreeUtilities::~SpanningTreeUtilities()
3779 {
3780         for (unsigned int i = 0; i < Bindings.size(); i++)
3781         {
3782                 ServerInstance->Log(DEBUG,"Freeing binding %d of %d",i, Bindings.size());
3783                 ServerInstance->SE->DelFd(Bindings[i]);
3784                 Bindings[i]->Close();
3785                 DELETE(Bindings[i]);
3786         }
3787         ServerInstance->Log(DEBUG,"Freeing connected servers...");
3788         while (TreeRoot->ChildCount())
3789         {
3790                 TreeServer* child_server = TreeRoot->GetChild(0);
3791                 ServerInstance->Log(DEBUG,"Freeing connected server %s", child_server->GetName().c_str());
3792                 if (child_server)
3793                 {
3794                         TreeSocket* sock = child_server->GetSocket();
3795                         ServerInstance->SE->DelFd(sock);
3796                         sock->Close();
3797                         DELETE(sock);
3798                 }
3799         }
3800         delete TreeRoot;
3801 }
3802
3803 void SpanningTreeUtilities::AddThisServer(TreeServer* server, TreeServerList &list)
3804 {
3805         if (list.find(server) == list.end())
3806                 list[server] = server;
3807 }
3808
3809 /** returns a list of DIRECT servernames for a specific channel */
3810 void SpanningTreeUtilities::GetListOfServersForChannel(chanrec* c, TreeServerList &list, char status, const CUList &exempt_list)
3811 {
3812         CUList *ulist;
3813         switch (status)
3814         {
3815                 case '@':
3816                         ulist = c->GetOppedUsers();
3817                 break;
3818                 case '%':
3819                         ulist = c->GetHalfoppedUsers();
3820                 break;
3821                 case '+':
3822                         ulist = c->GetVoicedUsers();
3823                 break;
3824                 default:
3825                         ulist = c->GetUsers();
3826                 break;
3827         }
3828         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
3829         {
3830                 if ((i->second->GetFd() < 0) && (exempt_list.find(i->second) == exempt_list.end()))
3831                 {
3832                         TreeServer* best = this->BestRouteTo(i->second->server);
3833                         if (best)
3834                                 AddThisServer(best,list);
3835                 }
3836         }
3837         return;
3838 }
3839
3840 bool SpanningTreeUtilities::DoOneToAllButSenderRaw(const std::string &data, const std::string &omit, const std::string &prefix, const irc::string &command, std::deque<std::string> &params)
3841 {
3842         char pfx = 0;
3843         TreeServer* omitroute = this->BestRouteTo(omit);
3844         if ((command == "NOTICE") || (command == "PRIVMSG"))
3845         {
3846                 if (params.size() >= 2)
3847                 {
3848                         /* Prefixes */
3849                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
3850                         {
3851                                 pfx = params[0][0];
3852                                 params[0] = params[0].substr(1, params[0].length()-1);
3853                         }
3854                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
3855                         {
3856                                 // special routing for private messages/notices
3857                                 userrec* d = ServerInstance->FindNick(params[0]);
3858                                 if (d)
3859                                 {
3860                                         std::deque<std::string> par;
3861                                         par.push_back(params[0]);
3862                                         par.push_back(":"+params[1]);
3863                                         this->DoOneToOne(prefix,command.c_str(),par,d->server);
3864                                         return true;
3865                                 }
3866                         }
3867                         else if (*(params[0].c_str()) == '$')
3868                         {
3869                                 std::deque<std::string> par;
3870                                 par.push_back(params[0]);
3871                                 par.push_back(":"+params[1]);
3872                                 this->DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
3873                                 return true;
3874                         }
3875                         else
3876                         {
3877                                 chanrec* c = ServerInstance->FindChan(params[0]);
3878                                 userrec* u = ServerInstance->FindNick(prefix);
3879                                 if (c && u)
3880                                 {
3881                                         CUList elist;
3882                                         TreeServerList list;
3883                                         FOREACH_MOD(I_OnBuildExemptList, OnBuildExemptList((command == "PRIVMSG" ? MSG_PRIVMSG : MSG_NOTICE), c, u, pfx, elist));
3884                                         GetListOfServersForChannel(c,list,pfx,elist);
3885
3886                                         for (TreeServerList::iterator i = list.begin(); i != list.end(); i++)
3887                                         {
3888                                                 TreeSocket* Sock = i->second->GetSocket();
3889                                                 if ((Sock) && (i->second->GetName() != omit) && (omitroute != i->second))
3890                                                 {
3891                                                         Sock->WriteLine(data);
3892                                                 }
3893                                         }
3894                                         return true;
3895                                 }
3896                         }
3897                 }
3898         }
3899         unsigned int items =this->TreeRoot->ChildCount();
3900         for (unsigned int x = 0; x < items; x++)
3901         {
3902                 TreeServer* Route = this->TreeRoot->GetChild(x);
3903                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3904                 {
3905                         TreeSocket* Sock = Route->GetSocket();
3906                         if (Sock)
3907                                 Sock->WriteLine(data);
3908                 }
3909         }
3910         return true;
3911 }
3912
3913 bool SpanningTreeUtilities::DoOneToAllButSender(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string omit)
3914 {
3915         TreeServer* omitroute = this->BestRouteTo(omit);
3916         std::string FullLine = ":" + prefix + " " + command;
3917         unsigned int words = params.size();
3918         for (unsigned int x = 0; x < words; x++)
3919         {
3920                 FullLine = FullLine + " " + params[x];
3921         }
3922         unsigned int items = this->TreeRoot->ChildCount();
3923         for (unsigned int x = 0; x < items; x++)
3924         {
3925                 TreeServer* Route = this->TreeRoot->GetChild(x);
3926                 // Send the line IF:
3927                 // The route has a socket (its a direct connection)
3928                 // The route isnt the one to be omitted
3929                 // The route isnt the path to the one to be omitted
3930                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3931                 {
3932                         TreeSocket* Sock = Route->GetSocket();
3933                         if (Sock)
3934                                 Sock->WriteLine(FullLine);
3935                 }
3936         }
3937         return true;
3938 }
3939
3940 bool SpanningTreeUtilities::DoOneToMany(const std::string &prefix, const std::string &command, std::deque<std::string> &params)
3941 {
3942         std::string FullLine = ":" + prefix + " " + command;
3943         unsigned int words = params.size();
3944         for (unsigned int x = 0; x < words; x++)
3945         {
3946                 FullLine = FullLine + " " + params[x];
3947         }
3948         unsigned int items = this->TreeRoot->ChildCount();
3949         for (unsigned int x = 0; x < items; x++)
3950         {
3951                 TreeServer* Route = this->TreeRoot->GetChild(x);
3952                 if (Route && Route->GetSocket())
3953                 {
3954                         TreeSocket* Sock = Route->GetSocket();
3955                         if (Sock)
3956                                 Sock->WriteLine(FullLine);
3957                 }
3958         }
3959         return true;
3960 }
3961
3962 bool SpanningTreeUtilities::DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params)
3963 {
3964         std::string spfx = prefix;
3965         std::string scmd = command;
3966         return this->DoOneToMany(spfx, scmd, params);
3967 }
3968
3969 bool SpanningTreeUtilities::DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit)
3970 {
3971         std::string spfx = prefix;
3972         std::string scmd = command;
3973         return this->DoOneToAllButSender(spfx, scmd, params, omit);
3974 }
3975
3976 bool SpanningTreeUtilities::DoOneToOne(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string target)
3977 {
3978         TreeServer* Route = this->BestRouteTo(target);
3979         if (Route)
3980         {
3981                 std::string FullLine = ":" + prefix + " " + command;
3982                 unsigned int words = params.size();
3983                 for (unsigned int x = 0; x < words; x++)
3984                 {
3985                         FullLine = FullLine + " " + params[x];
3986                 }
3987                 if (Route && Route->GetSocket())
3988                 {
3989                         TreeSocket* Sock = Route->GetSocket();
3990                         if (Sock)
3991                                 Sock->WriteLine(FullLine);
3992                 }
3993                 return true;
3994         }
3995         else
3996         {
3997                 return false;
3998         }
3999 }
4000
4001 void SpanningTreeUtilities::ReadConfiguration(bool rebind)
4002 {
4003         ConfigReader* Conf = new ConfigReader(ServerInstance);
4004         if (rebind)
4005         {
4006                 for (int j =0; j < Conf->Enumerate("bind"); j++)
4007                 {
4008                         std::string Type = Conf->ReadValue("bind","type",j);
4009                         std::string IP = Conf->ReadValue("bind","address",j);
4010                         std::string Port = Conf->ReadValue("bind","port",j);
4011                         std::string transport = Conf->ReadValue("bind","transport",j);
4012                         if (Type == "servers")
4013                         {
4014                                 irc::portparser portrange(Port, false);
4015                                 int portno = -1;
4016                                 while ((portno = portrange.GetToken()))
4017                                 {
4018                                         ServerInstance->Log(DEBUG,"m_spanningtree: Binding server port %s:%d", IP.c_str(), portno);
4019                                         if (IP == "*")
4020                                                 IP = "";
4021
4022                                         if ((!transport.empty()) && (hooks.find(transport.c_str()) ==  hooks.end()))
4023                                         {
4024                                                 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",
4025                                                                 transport.c_str(), IP.c_str(), Port.c_str());
4026                                                 break;
4027                                         }
4028
4029                                         TreeSocket* listener = new TreeSocket(this, ServerInstance, IP.c_str(), portno, true, 10, transport.empty() ? NULL : hooks[transport.c_str()]);
4030                                         if (listener->GetState() == I_LISTENING)
4031                                         {
4032                                                 ServerInstance->Log(DEFAULT,"m_spanningtree: Binding server port %s:%d successful!", IP.c_str(), portno);
4033                                                 Bindings.push_back(listener);
4034                                         }
4035                                         else
4036                                         {
4037                                                 ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %s:%d",IP.c_str(), portno);
4038                                                 listener->Close();
4039                                                 DELETE(listener);
4040                                         }
4041                                         ServerInstance->Log(DEBUG,"Done with this binding");
4042                                 }
4043                         }
4044                 }
4045         }
4046         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
4047         HideULines = Conf->ReadFlag("options","hideulines",0);
4048         AnnounceTSChange = Conf->ReadFlag("options","announcets",0);
4049         EnableTimeSync = !(Conf->ReadFlag("options","notimesync",0));
4050         LinkBlocks.clear();
4051         ValidIPs.clear();
4052         for (int j =0; j < Conf->Enumerate("link"); j++)
4053         {
4054                 Link L;
4055                 std::string Allow = Conf->ReadValue("link","allowmask",j);
4056                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
4057                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
4058                 L.FailOver = Conf->ReadValue("link","failover",j).c_str();
4059                 L.Port = Conf->ReadInteger("link","port",j,true);
4060                 L.SendPass = Conf->ReadValue("link","sendpass",j);
4061                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
4062                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
4063                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
4064                 L.Timeout = Conf->ReadInteger("link","timeout",j,true);
4065                 L.Hook = Conf->ReadValue("link", "transport", j);
4066
4067                 if ((!L.Hook.empty()) && (hooks.find(L.Hook.c_str()) ==  hooks.end()))
4068                 {
4069                         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.",
4070                                         L.Hook.c_str(), L.Name.c_str());
4071                         continue;
4072
4073                 }
4074
4075                 L.NextConnectTime = time(NULL) + L.AutoConnect;
4076                 /* Bugfix by brain, do not allow people to enter bad configurations */
4077                 if (L.Name != ServerInstance->Config->ServerName)
4078                 {
4079                         if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
4080                         {
4081                                 ValidIPs.push_back(L.IPAddr);
4082
4083                                 if (Allow.length())
4084                                         ValidIPs.push_back(Allow);
4085
4086                                 /* Needs resolving */
4087                                 insp_inaddr binip;
4088                                 if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
4089                                 {
4090                                         try
4091                                         {
4092                                                 SecurityIPResolver* sr = new SecurityIPResolver((Module*)this->Creator, this, ServerInstance, L.IPAddr, L);
4093                                                 ServerInstance->AddResolver(sr);
4094                                         }
4095                                         catch (ModuleException& e)
4096                                         {
4097                                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4098                                         }
4099                                 }
4100
4101                                 LinkBlocks.push_back(L);
4102                                 ServerInstance->Log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
4103                         }
4104                         else
4105                         {
4106                                 if (L.IPAddr == "")
4107                                 {
4108                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
4109                                 }
4110                                 else if (L.RecvPass == "")
4111                                 {
4112                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
4113                                 }
4114                                 else if (L.SendPass == "")
4115                                 {
4116                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
4117                                 }
4118                                 else if (L.Name == "")
4119                                 {
4120                                         ServerInstance->Log(DEFAULT,"Invalid configuration, link tag without a name!");
4121                                 }
4122                                 else if (!L.Port)
4123                                 {
4124                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
4125                                 }
4126                         }
4127                 }
4128                 else
4129                 {
4130                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', link tag has the same server name as the local server!",L.Name.c_str());
4131                 }
4132         }
4133         DELETE(Conf);
4134 }
4135
4136 /** To create a timer which recurs every second, we inherit from InspTimer.
4137  * InspTimer is only one-shot however, so at the end of each Tick() we simply
4138  * insert another of ourselves into the pending queue :)
4139  */
4140 class TimeSyncTimer : public InspTimer
4141 {
4142  private:
4143         InspIRCd *Instance;
4144         ModuleSpanningTree *Module;
4145  public:
4146         TimeSyncTimer(InspIRCd *Instance, ModuleSpanningTree *Mod);
4147         virtual void Tick(time_t TIME);
4148 };
4149
4150 HandshakeTimer::HandshakeTimer(InspIRCd* Inst, TreeSocket* s, Link* l, SpanningTreeUtilities* u) : InspTimer(1, time(NULL)), Instance(Inst), sock(s), lnk(l), Utils(u)
4151 {
4152         thefd = sock->GetFd();
4153 }
4154
4155 void HandshakeTimer::Tick(time_t TIME)
4156 {
4157         if (Instance->SE->GetRef(thefd) == sock)
4158         {
4159                 if (sock->GetHook() && InspSocketHSCompleteRequest(sock, (Module*)Utils->Creator, sock->GetHook()).Send())
4160                 {
4161                         Instance->Log(DEBUG,"Handshake timer activated, sending SERVER and/or CAPAB");
4162                         InspSocketAttachCertRequest(sock, (Module*)Utils->Creator, sock->GetHook()).Send();
4163                         sock->SendCapabilities();
4164                         if (sock->GetLinkState() == CONNECTING)
4165                         {
4166                                 sock->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+lnk->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
4167                         }
4168                 }
4169                 else
4170                 {
4171                         Instance->Timers->AddTimer(new HandshakeTimer(Instance, sock, lnk, Utils));
4172                 }
4173         }
4174 }
4175
4176 class ModuleSpanningTree : public Module
4177 {
4178         int line;
4179         int NumServers;
4180         unsigned int max_local;
4181         unsigned int max_global;
4182         cmd_rconnect* command_rconnect;
4183         SpanningTreeUtilities* Utils;
4184
4185  public:
4186         TimeSyncTimer *SyncTimer;
4187
4188         ModuleSpanningTree(InspIRCd* Me)
4189                 : Module::Module(Me), max_local(0), max_global(0)
4190         {
4191                 Utils = new SpanningTreeUtilities(Me, this);
4192
4193                 command_rconnect = new cmd_rconnect(ServerInstance, this, Utils);
4194                 ServerInstance->AddCommand(command_rconnect);
4195
4196                 if (Utils->EnableTimeSync)
4197                 {
4198                         SyncTimer = new TimeSyncTimer(ServerInstance, this);
4199                         ServerInstance->Timers->AddTimer(SyncTimer);
4200                 }
4201                 else
4202                         SyncTimer = NULL;
4203         }
4204
4205         void ShowLinks(TreeServer* Current, userrec* user, int hops)
4206         {
4207                 std::string Parent = Utils->TreeRoot->GetName();
4208                 if (Current->GetParent())
4209                 {
4210                         Parent = Current->GetParent()->GetName();
4211                 }
4212                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
4213                 {
4214                         if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
4215                         {
4216                                 if (*user->oper)
4217                                 {
4218                                          ShowLinks(Current->GetChild(q),user,hops+1);
4219                                 }
4220                         }
4221                         else
4222                         {
4223                                 ShowLinks(Current->GetChild(q),user,hops+1);
4224                         }
4225                 }
4226                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
4227                 if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetName().c_str())) && (!*user->oper))
4228                         return;
4229                 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());
4230         }
4231
4232         int CountLocalServs()
4233         {
4234                 return Utils->TreeRoot->ChildCount();
4235         }
4236
4237         int CountServs()
4238         {
4239                 return Utils->serverlist.size();
4240         }
4241
4242         void HandleLinks(const char** parameters, int pcnt, userrec* user)
4243         {
4244                 ShowLinks(Utils->TreeRoot,user,0);
4245                 user->WriteServ("365 %s * :End of /LINKS list.",user->nick);
4246                 return;
4247         }
4248
4249         void HandleLusers(const char** parameters, int pcnt, userrec* user)
4250         {
4251                 unsigned int n_users = ServerInstance->UserCount();
4252
4253                 /* Only update these when someone wants to see them, more efficient */
4254                 if ((unsigned int)ServerInstance->LocalUserCount() > max_local)
4255                         max_local = ServerInstance->LocalUserCount();
4256                 if (n_users > max_global)
4257                         max_global = n_users;
4258
4259                 unsigned int ulined_count = 0;
4260                 unsigned int ulined_local_count = 0;
4261
4262                 /* If ulined are hidden and we're not an oper, count the number of ulined servers hidden,
4263                  * locally and globally (locally means directly connected to us)
4264                  */
4265                 if ((Utils->HideULines) && (!*user->oper))
4266                 {
4267                         for (server_hash::iterator q = Utils->serverlist.begin(); q != Utils->serverlist.end(); q++)
4268                         {
4269                                 if (ServerInstance->ULine(q->second->GetName().c_str()))
4270                                 {
4271                                         ulined_count++;
4272                                         if (q->second->GetParent() == Utils->TreeRoot)
4273                                                 ulined_local_count++;
4274                                 }
4275                         }
4276                 }
4277
4278                 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());
4279                 if (ServerInstance->OperCount())
4280                         user->WriteServ("252 %s %d :operator(s) online",user->nick,ServerInstance->OperCount());
4281                 if (ServerInstance->UnregisteredUserCount())
4282                         user->WriteServ("253 %s %d :unknown connections",user->nick,ServerInstance->UnregisteredUserCount());
4283                 if (ServerInstance->ChannelCount())
4284                         user->WriteServ("254 %s %d :channels formed",user->nick,ServerInstance->ChannelCount());
4285                 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());
4286                 user->WriteServ("265 %s :Current Local Users: %d  Max: %d",user->nick,ServerInstance->LocalUserCount(),max_local);
4287                 user->WriteServ("266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
4288                 return;
4289         }
4290
4291         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
4292
4293         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
4294         {
4295                 if (line < 128)
4296                 {
4297                         for (int t = 0; t < depth; t++)
4298                         {
4299                                 matrix[line][t] = ' ';
4300                         }
4301
4302                         // For Aligning, we need to work out exactly how deep this thing is, and produce
4303                         // a 'Spacer' String to compensate.
4304                         char spacer[40];
4305
4306                         memset(spacer,' ',40);
4307                         if ((40 - Current->GetName().length() - depth) > 1) {
4308                                 spacer[40 - Current->GetName().length() - depth] = '\0';
4309                         }
4310                         else
4311                         {
4312                                 spacer[5] = '\0';
4313                         }
4314
4315                         float percent;
4316                         char text[80];
4317                         if (ServerInstance->clientlist.size() == 0) {
4318                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
4319                                 percent = 0;
4320                         }
4321                         else
4322                         {
4323                                 percent = ((float)Current->GetUserCount() / (float)ServerInstance->clientlist.size()) * 100;
4324                         }
4325                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
4326                         totusers += Current->GetUserCount();
4327                         totservers++;
4328                         strlcpy(&matrix[line][depth],text,80);
4329                         line++;
4330                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
4331                         {
4332                                 if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
4333                                 {
4334                                         if (*user->oper)
4335                                         {
4336                                                 ShowMap(Current->GetChild(q),user,(Utils->FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
4337                                         }
4338                                 }
4339                                 else
4340                                 {
4341                                         ShowMap(Current->GetChild(q),user,(Utils->FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
4342                                 }
4343                         }
4344                 }
4345         }
4346
4347         int HandleMotd(const char** parameters, int pcnt, userrec* user)
4348         {
4349                 if (pcnt > 0)
4350                 {
4351                         /* Remote MOTD, the server is within the 1st parameter */
4352                         std::deque<std::string> params;
4353                         params.push_back(parameters[0]);
4354
4355                         /* Send it out remotely, generate no reply yet */
4356                         TreeServer* s = Utils->FindServerMask(parameters[0]);
4357                         if (s)
4358                         {
4359                                 Utils->DoOneToOne(user->nick, "MOTD", params, s->GetName());
4360                         }
4361                         else
4362                         {
4363                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4364                         }
4365                         return 1;
4366                 }
4367                 return 0;
4368         }
4369
4370         int HandleAdmin(const char** parameters, int pcnt, userrec* user)
4371         {
4372                 if (pcnt > 0)
4373                 {
4374                         /* Remote ADMIN, the server is within the 1st parameter */
4375                         std::deque<std::string> params;
4376                         params.push_back(parameters[0]);
4377
4378                         /* Send it out remotely, generate no reply yet */
4379                         TreeServer* s = Utils->FindServerMask(parameters[0]);
4380                         if (s)
4381                         {
4382                                 Utils->DoOneToOne(user->nick, "ADMIN", params, s->GetName());
4383                         }
4384                         else
4385                         {
4386                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4387                         }
4388                         return 1;
4389                 }
4390                 return 0;
4391         }
4392
4393         int HandleStats(const char** parameters, int pcnt, userrec* user)
4394         {
4395                 if (pcnt > 1)
4396                 {
4397                         /* Remote STATS, the server is within the 2nd parameter */
4398                         std::deque<std::string> params;
4399                         params.push_back(parameters[0]);
4400                         params.push_back(parameters[1]);
4401                         /* Send it out remotely, generate no reply yet */
4402                         TreeServer* s = Utils->FindServerMask(parameters[1]);
4403                         if (s)
4404                         {
4405                                 params[1] = s->GetName();
4406                                 Utils->DoOneToOne(user->nick, "STATS", params, s->GetName());
4407                         }
4408                         else
4409                         {
4410                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4411                         }
4412                         return 1;
4413                 }
4414                 return 0;
4415         }
4416
4417         // Ok, prepare to be confused.
4418         // After much mulling over how to approach this, it struck me that
4419         // the 'usual' way of doing a /MAP isnt the best way. Instead of
4420         // keeping track of a ton of ascii characters, and line by line
4421         // under recursion working out where to place them using multiplications
4422         // and divisons, we instead render the map onto a backplane of characters
4423         // (a character matrix), then draw the branches as a series of "L" shapes
4424         // from the nodes. This is not only friendlier on CPU it uses less stack.
4425
4426         void HandleMap(const char** parameters, int pcnt, userrec* user)
4427         {
4428                 // This array represents a virtual screen which we will
4429                 // "scratch" draw to, as the console device of an irc
4430                 // client does not provide for a proper terminal.
4431                 float totusers = 0;
4432                 float totservers = 0;
4433                 char matrix[128][80];
4434                 for (unsigned int t = 0; t < 128; t++)
4435                 {
4436                         matrix[t][0] = '\0';
4437                 }
4438                 line = 0;
4439                 // The only recursive bit is called here.
4440                 ShowMap(Utils->TreeRoot,user,0,matrix,totusers,totservers);
4441                 // Process each line one by one. The algorithm has a limit of
4442                 // 128 servers (which is far more than a spanning tree should have
4443                 // anyway, so we're ok). This limit can be raised simply by making
4444                 // the character matrix deeper, 128 rows taking 10k of memory.
4445                 for (int l = 1; l < line; l++)
4446                 {
4447                         // scan across the line looking for the start of the
4448                         // servername (the recursive part of the algorithm has placed
4449                         // the servers at indented positions depending on what they
4450                         // are related to)
4451                         int first_nonspace = 0;
4452                         while (matrix[l][first_nonspace] == ' ')
4453                         {
4454                                 first_nonspace++;
4455                         }
4456                         first_nonspace--;
4457                         // Draw the `- (corner) section: this may be overwritten by
4458                         // another L shape passing along the same vertical pane, becoming
4459                         // a |- (branch) section instead.
4460                         matrix[l][first_nonspace] = '-';
4461                         matrix[l][first_nonspace-1] = '`';
4462                         int l2 = l - 1;
4463                         // Draw upwards until we hit the parent server, causing possibly
4464                         // other corners (`-) to become branches (|-)
4465                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
4466                         {
4467                                 matrix[l2][first_nonspace-1] = '|';
4468                                 l2--;
4469                         }
4470                 }
4471                 // dump the whole lot to the user. This is the easy bit, honest.
4472                 for (int t = 0; t < line; t++)
4473                 {
4474                         user->WriteServ("006 %s :%s",user->nick,&matrix[t][0]);
4475                 }
4476                 float avg_users = totusers / totservers;
4477                 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);
4478         user->WriteServ("007 %s :End of /MAP",user->nick);
4479                 return;
4480         }
4481
4482         int HandleSquit(const char** parameters, int pcnt, userrec* user)
4483         {
4484                 TreeServer* s = Utils->FindServerMask(parameters[0]);
4485                 if (s)
4486                 {
4487                         if (s == Utils->TreeRoot)
4488                         {
4489                                 user->WriteServ("NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
4490                                 return 1;
4491                         }
4492                         TreeSocket* sock = s->GetSocket();
4493                         if (sock)
4494                         {
4495                                 ServerInstance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
4496                                 ServerInstance->SNO->WriteToSnoMask('l',"SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
4497                                 sock->Squit(s,std::string("Server quit by ") + user->GetFullRealHost());
4498                                 ServerInstance->SE->DelFd(sock);
4499                                 sock->Close();
4500                                 delete sock;
4501                         }
4502                         else
4503                         {
4504                                 /* route it */
4505                                 std::deque<std::string> params;
4506                                 params.push_back(parameters[0]);
4507                                 params.push_back(std::string(":Server quit by ") + user->GetFullRealHost());
4508                                 Utils->DoOneToOne(user->nick, "RSQUIT", params, parameters[0]);
4509                         }
4510                 }
4511                 else
4512                 {
4513                          user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
4514                 }
4515                 return 1;
4516         }
4517
4518         int HandleTime(const char** parameters, int pcnt, userrec* user)
4519         {
4520                 if ((IS_LOCAL(user)) && (pcnt))
4521                 {
4522                         TreeServer* found = Utils->FindServerMask(parameters[0]);
4523                         if (found)
4524                         {
4525                                 // we dont' override for local server
4526                                 if (found == Utils->TreeRoot)
4527                                         return 0;
4528
4529                                 std::deque<std::string> params;
4530                                 params.push_back(found->GetName());
4531                                 params.push_back(user->nick);
4532                                 Utils->DoOneToOne(ServerInstance->Config->ServerName,"TIME",params,found->GetName());
4533                         }
4534                         else
4535                         {
4536                                 user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4537                         }
4538                 }
4539                 return 1;
4540         }
4541
4542         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
4543         {
4544                 if ((IS_LOCAL(user)) && (pcnt > 1))
4545                 {
4546                         userrec* remote = ServerInstance->FindNick(parameters[1]);
4547                         if ((remote) && (remote->GetFd() < 0))
4548                         {
4549                                 std::deque<std::string> params;
4550                                 params.push_back(parameters[1]);
4551                                 Utils->DoOneToOne(user->nick,"IDLE",params,remote->server);
4552                                 return 1;
4553                         }
4554                         else if (!remote)
4555                         {
4556                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[1]);
4557                                 user->WriteServ("318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
4558                                 return 1;
4559                         }
4560                 }
4561                 return 0;
4562         }
4563
4564         void DoPingChecks(time_t curtime)
4565         {
4566                 for (unsigned int j = 0; j < Utils->TreeRoot->ChildCount(); j++)
4567                 {
4568                         TreeServer* serv = Utils->TreeRoot->GetChild(j);
4569                         TreeSocket* sock = serv->GetSocket();
4570                         if (sock)
4571                         {
4572                                 if (curtime >= serv->NextPingTime())
4573                                 {
4574                                         if (serv->AnsweredLastPing())
4575                                         {
4576                                                 sock->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" PING "+serv->GetName());
4577                                                 serv->SetNextPingTime(curtime + 60);
4578                                         }
4579                                         else
4580                                         {
4581                                                 // they didnt answer, boot them
4582                                                 ServerInstance->SNO->WriteToSnoMask('l',"Server \002%s\002 pinged out",serv->GetName().c_str());
4583                                                 sock->Squit(serv,"Ping timeout");
4584                                                 ServerInstance->SE->DelFd(sock);
4585                                                 sock->Close();
4586                                                 delete sock;
4587                                                 return;
4588                                         }
4589                                 }
4590                         }
4591                 }
4592         }
4593
4594         void ConnectServer(Link* x)
4595         {
4596                 insp_inaddr binip;
4597
4598                 /* Do we already have an IP? If so, no need to resolve it. */
4599                 if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
4600                 {
4601                         /* Gave a hook, but it wasnt one we know */
4602                         if ((!x->Hook.empty()) && (Utils->hooks.find(x->Hook.c_str()) == Utils->hooks.end()))
4603                                 return;
4604
4605                         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()]);
4606                         if (newsocket->GetFd() > -1)
4607                         {
4608                                 /* Handled automatically on success */
4609                         }
4610                         else
4611                         {
4612                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
4613                                 delete newsocket;
4614                                 Utils->DoFailOver(x);
4615                         }
4616                 }
4617                 else
4618                 {
4619                         try
4620                         {
4621                                 ServernameResolver* snr = new ServernameResolver((Module*)this, Utils, ServerInstance,x->IPAddr, *x);
4622                                 ServerInstance->AddResolver(snr);
4623                         }
4624                         catch (ModuleException& e)
4625                         {
4626                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4627                                 Utils->DoFailOver(x);
4628                         }
4629                 }
4630         }
4631
4632         void AutoConnectServers(time_t curtime)
4633         {
4634                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
4635                 {
4636                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
4637                         {
4638                                 ServerInstance->Log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
4639                                 x->NextConnectTime = curtime + x->AutoConnect;
4640                                 TreeServer* CheckDupe = Utils->FindServer(x->Name.c_str());
4641                                 if (x->FailOver.length())
4642                                 {
4643                                         TreeServer* CheckFailOver = Utils->FindServer(x->FailOver.c_str());
4644                                         if (CheckFailOver)
4645                                         {
4646                                                 /* The failover for this server is currently a member of the network.
4647                                                  * The failover probably succeeded, where the main link did not.
4648                                                  * Don't try the main link until the failover is gone again.
4649                                                  */
4650                                                 continue;
4651                                         }
4652                                 }
4653                                 if (!CheckDupe)
4654                                 {
4655                                         // an autoconnected server is not connected. Check if its time to connect it
4656                                         ServerInstance->SNO->WriteToSnoMask('l',"AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
4657                                         this->ConnectServer(&(*x));
4658                                 }
4659                         }
4660                 }
4661         }
4662
4663         int HandleVersion(const char** parameters, int pcnt, userrec* user)
4664         {
4665                 // we've already checked if pcnt > 0, so this is safe
4666                 TreeServer* found = Utils->FindServerMask(parameters[0]);
4667                 if (found)
4668                 {
4669                         std::string Version = found->GetVersion();
4670                         user->WriteServ("351 %s :%s",user->nick,Version.c_str());
4671                         if (found == Utils->TreeRoot)
4672                         {
4673                                 std::stringstream out(ServerInstance->Config->data005);
4674                                 std::string token = "";
4675                                 std::string line5 = "";
4676                                 int token_counter = 0;
4677
4678                                 while (!out.eof())
4679                                 {
4680                                         out >> token;
4681                                         line5 = line5 + token + " ";
4682                                         token_counter++;
4683
4684                                         if ((token_counter >= 13) || (out.eof() == true))
4685                                         {
4686                                                 user->WriteServ("005 %s %s:are supported by this server",user->nick,line5.c_str());
4687                                                 line5 = "";
4688                                                 token_counter = 0;
4689                                         }
4690                                 }
4691                         }
4692                 }
4693                 else
4694                 {
4695                         user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4696                 }
4697                 return 1;
4698         }
4699
4700         int HandleConnect(const char** parameters, int pcnt, userrec* user)
4701         {
4702                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
4703                 {
4704                         if (ServerInstance->MatchText(x->Name.c_str(),parameters[0]))
4705                         {
4706                                 TreeServer* CheckDupe = Utils->FindServer(x->Name.c_str());
4707                                 if (!CheckDupe)
4708                                 {
4709                                         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);
4710                                         ConnectServer(&(*x));
4711                                         return 1;
4712                                 }
4713                                 else
4714                                 {
4715                                         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());
4716                                         return 1;
4717                                 }
4718                         }
4719                 }
4720                 user->WriteServ("NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
4721                 return 1;
4722         }
4723
4724         void BroadcastTimeSync()
4725         {
4726                 std::deque<std::string> params;
4727                 params.push_back(ConvToStr(ServerInstance->Time(true)));
4728                 Utils->DoOneToMany(Utils->TreeRoot->GetName(), "TIMESET", params);
4729         }
4730
4731         virtual int OnStats(char statschar, userrec* user, string_list &results)
4732         {
4733                 if ((statschar == 'c') || (statschar == 'n'))
4734                 {
4735                         for (unsigned int i = 0; i < Utils->LinkBlocks.size(); i++)
4736                         {
4737                                 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');
4738                                 if (statschar == 'c')
4739                                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 244 "+user->nick+" H * * "+Utils->LinkBlocks[i].Name.c_str());
4740                         }
4741                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 219 "+user->nick+" "+statschar+" :End of /STATS report");
4742                         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);
4743                         return 1;
4744                 }
4745                 return 0;
4746         }
4747
4748         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
4749         {
4750                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
4751                 if (!validated)
4752                         return 0;
4753
4754                 if (command == "CONNECT")
4755                 {
4756                         return this->HandleConnect(parameters,pcnt,user);
4757                 }
4758                 else if (command == "STATS")
4759                 {
4760                         return this->HandleStats(parameters,pcnt,user);
4761                 }
4762                 else if (command == "MOTD")
4763                 {
4764                         return this->HandleMotd(parameters,pcnt,user);
4765                 }
4766                 else if (command == "ADMIN")
4767                 {
4768                         return this->HandleAdmin(parameters,pcnt,user);
4769                 }
4770                 else if (command == "SQUIT")
4771                 {
4772                         return this->HandleSquit(parameters,pcnt,user);
4773                 }
4774                 else if (command == "MAP")
4775                 {
4776                         this->HandleMap(parameters,pcnt,user);
4777                         return 1;
4778                 }
4779                 else if ((command == "TIME") && (pcnt > 0))
4780                 {
4781                         return this->HandleTime(parameters,pcnt,user);
4782                 }
4783                 else if (command == "LUSERS")
4784                 {
4785                         this->HandleLusers(parameters,pcnt,user);
4786                         return 1;
4787                 }
4788                 else if (command == "LINKS")
4789                 {
4790                         this->HandleLinks(parameters,pcnt,user);
4791                         return 1;
4792                 }
4793                 else if (command == "WHOIS")
4794                 {
4795                         if (pcnt > 1)
4796                         {
4797                                 // remote whois
4798                                 return this->HandleRemoteWhois(parameters,pcnt,user);
4799                         }
4800                 }
4801                 else if ((command == "VERSION") && (pcnt > 0))
4802                 {
4803                         this->HandleVersion(parameters,pcnt,user);
4804                         return 1;
4805                 }
4806
4807                 return 0;
4808         }
4809
4810         virtual void OnPostCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, CmdResult result, const std::string &original_line)
4811         {
4812                 if ((result == CMD_SUCCESS) && (ServerInstance->IsValidModuleCommand(command, pcnt, user)))
4813                 {
4814                         // this bit of code cleverly routes all module commands
4815                         // to all remote severs *automatically* so that modules
4816                         // can just handle commands locally, without having
4817                         // to have any special provision in place for remote
4818                         // commands and linking protocols.
4819                         std::deque<std::string> params;
4820                         params.clear();
4821                         for (int j = 0; j < pcnt; j++)
4822                         {
4823                                 if (strchr(parameters[j],' '))
4824                                 {
4825                                         params.push_back(":" + std::string(parameters[j]));
4826                                 }
4827                                 else
4828                                 {
4829                                         params.push_back(std::string(parameters[j]));
4830                                 }
4831                         }
4832                         ServerInstance->Log(DEBUG,"Globally route '%s'",command.c_str());
4833                         Utils->DoOneToMany(user->nick,command,params);
4834                 }
4835         }
4836
4837         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
4838         {
4839                 TreeServer* s = Utils->FindServer(servername);
4840                 if (s)
4841                 {
4842                         description = s->GetDesc();
4843                 }
4844         }
4845
4846         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
4847         {
4848                 if (IS_LOCAL(source))
4849                 {
4850                         std::deque<std::string> params;
4851                         params.push_back(dest->nick);
4852                         params.push_back(channel->name);
4853                         Utils->DoOneToMany(source->nick,"INVITE",params);
4854                 }
4855         }
4856
4857         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
4858         {
4859                 std::deque<std::string> params;
4860                 params.push_back(chan->name);
4861                 params.push_back(":"+topic);
4862                 Utils->DoOneToMany(user->nick,"TOPIC",params);
4863         }
4864
4865         virtual void OnWallops(userrec* user, const std::string &text)
4866         {
4867                 if (IS_LOCAL(user))
4868                 {
4869                         std::deque<std::string> params;
4870                         params.push_back(":"+text);
4871                         Utils->DoOneToMany(user->nick,"WALLOPS",params);
4872                 }
4873         }
4874
4875         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status, const CUList &exempt_list)
4876         {
4877                 if (target_type == TYPE_USER)
4878                 {
4879                         userrec* d = (userrec*)dest;
4880                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4881                         {
4882                                 std::deque<std::string> params;
4883                                 params.clear();
4884                                 params.push_back(d->nick);
4885                                 params.push_back(":"+text);
4886                                 Utils->DoOneToOne(user->nick,"NOTICE",params,d->server);
4887                         }
4888                 }
4889                 else if (target_type == TYPE_CHANNEL)
4890                 {
4891                         if (IS_LOCAL(user))
4892                         {
4893                                 chanrec *c = (chanrec*)dest;
4894                                 if (c)
4895                                 {
4896                                         std::string cname = c->name;
4897                                         if (status)
4898                                                 cname = status + cname;
4899                                         TreeServerList list;
4900                                         Utils->GetListOfServersForChannel(c,list,status,exempt_list);
4901
4902                                         for (TreeServerList::iterator i = list.begin(); i != list.end(); i++)
4903                                         {
4904                                                 TreeSocket* Sock = i->second->GetSocket();
4905                                                 if (Sock)
4906                                                         Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
4907                                         }
4908                                 }
4909                         }
4910                 }
4911                 else if (target_type == TYPE_SERVER)
4912                 {
4913                         if (IS_LOCAL(user))
4914                         {
4915                                 char* target = (char*)dest;
4916                                 std::deque<std::string> par;
4917                                 par.push_back(target);
4918                                 par.push_back(":"+text);
4919                                 Utils->DoOneToMany(user->nick,"NOTICE",par);
4920                         }
4921                 }
4922         }
4923
4924         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status, const CUList &exempt_list)
4925         {
4926                 if (target_type == TYPE_USER)
4927                 {
4928                         // route private messages which are targetted at clients only to the server
4929                         // which needs to receive them
4930                         userrec* d = (userrec*)dest;
4931                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4932                         {
4933                                 std::deque<std::string> params;
4934                                 params.clear();
4935                                 params.push_back(d->nick);
4936                                 params.push_back(":"+text);
4937                                 Utils->DoOneToOne(user->nick,"PRIVMSG",params,d->server);
4938                         }
4939                 }
4940                 else if (target_type == TYPE_CHANNEL)
4941                 {
4942                         if (IS_LOCAL(user))
4943                         {
4944                                 chanrec *c = (chanrec*)dest;
4945                                 if (c)
4946                                 {
4947                                         std::string cname = c->name;
4948                                         if (status)
4949                                                 cname = status + cname;
4950                                         TreeServerList list;
4951                                         Utils->GetListOfServersForChannel(c,list,status,exempt_list);
4952
4953                                         for (TreeServerList::iterator i = list.begin(); i != list.end(); i++)
4954                                         {
4955                                                 TreeSocket* Sock = i->second->GetSocket();
4956                                                 if (Sock)
4957                                                         Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
4958                                         }
4959                                 }
4960                         }
4961                 }
4962                 else if (target_type == TYPE_SERVER)
4963                 {
4964                         if (IS_LOCAL(user))
4965                         {
4966                                 char* target = (char*)dest;
4967                                 std::deque<std::string> par;
4968                                 par.push_back(target);
4969                                 par.push_back(":"+text);
4970                                 Utils->DoOneToMany(user->nick,"PRIVMSG",par);
4971                         }
4972                 }
4973         }
4974
4975         virtual void OnBackgroundTimer(time_t curtime)
4976         {
4977                 AutoConnectServers(curtime);
4978                 DoPingChecks(curtime);
4979         }
4980
4981         virtual void OnUserJoin(userrec* user, chanrec* channel)
4982         {
4983                 // Only do this for local users
4984                 if (IS_LOCAL(user))
4985                 {
4986                         std::deque<std::string> params;
4987                         params.clear();
4988                         params.push_back(channel->name);
4989                         // set up their permissions and the channel TS with FJOIN.
4990                         // All users are FJOINed now, because a module may specify
4991                         // new joining permissions for the user.
4992                         params.clear();
4993                         params.push_back(channel->name);
4994                         params.push_back(ConvToStr(channel->age));
4995                         params.push_back(std::string(channel->GetAllPrefixChars(user))+","+std::string(user->nick));
4996                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FJOIN",params);
4997                         if (channel->GetUserCounter() == 1)
4998                         {
4999                                 /* First user in, sync the modes for the channel */
5000                                 params.pop_back();
5001                                 /* This is safe, all inspircd servers default to +nt */
5002                                 params.push_back("+nt");
5003                                 Utils->DoOneToMany(ServerInstance->Config->ServerName,"FMODE",params);
5004                         }
5005                 }
5006         }
5007
5008         virtual void OnChangeHost(userrec* user, const std::string &newhost)
5009         {
5010                 // only occurs for local clients
5011                 if (user->registered != REG_ALL)
5012                         return;
5013                 std::deque<std::string> params;
5014                 params.push_back(newhost);
5015                 Utils->DoOneToMany(user->nick,"FHOST",params);
5016         }
5017
5018         virtual void OnChangeName(userrec* user, const std::string &gecos)
5019         {
5020                 // only occurs for local clients
5021                 if (user->registered != REG_ALL)
5022                         return;
5023                 std::deque<std::string> params;
5024                 params.push_back(gecos);
5025                 Utils->DoOneToMany(user->nick,"FNAME",params);
5026         }
5027
5028         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
5029         {
5030                 if (IS_LOCAL(user))
5031                 {
5032                         std::deque<std::string> params;
5033                         params.push_back(channel->name);
5034                         if (partmessage != "")
5035                                 params.push_back(":"+partmessage);
5036                         Utils->DoOneToMany(user->nick,"PART",params);
5037                 }
5038         }
5039
5040         virtual void OnUserConnect(userrec* user)
5041         {
5042                 char agestr[MAXBUF];
5043                 if (IS_LOCAL(user))
5044                 {
5045                         std::deque<std::string> params;
5046                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
5047                         params.push_back(agestr);
5048                         params.push_back(user->nick);
5049                         params.push_back(user->host);
5050                         params.push_back(user->dhost);
5051                         params.push_back(user->ident);
5052                         params.push_back("+"+std::string(user->FormatModes()));
5053                         params.push_back(user->GetIPString());
5054                         params.push_back(":"+std::string(user->fullname));
5055                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"NICK",params);
5056
5057                         // User is Local, change needs to be reflected!
5058                         TreeServer* SourceServer = Utils->FindServer(user->server);
5059                         if (SourceServer)
5060                         {
5061                                 SourceServer->AddUserCount();
5062                         }
5063
5064                 }
5065         }
5066
5067         virtual void OnUserQuit(userrec* user, const std::string &reason)
5068         {
5069                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
5070                 {
5071                         std::deque<std::string> params;
5072                         params.push_back(":"+reason);
5073                         Utils->DoOneToMany(user->nick,"QUIT",params);
5074                 }
5075                 // Regardless, We need to modify the user Counts..
5076                 TreeServer* SourceServer = Utils->FindServer(user->server);
5077                 if (SourceServer)
5078                 {
5079                         SourceServer->DelUserCount();
5080                 }
5081
5082         }
5083
5084         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
5085         {
5086                 if (IS_LOCAL(user))
5087                 {
5088                         std::deque<std::string> params;
5089                         params.push_back(user->nick);
5090                         Utils->DoOneToMany(oldnick,"NICK",params);
5091                 }
5092         }
5093
5094         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
5095         {
5096                 if ((source) && (IS_LOCAL(source)))
5097                 {
5098                         std::deque<std::string> params;
5099                         params.push_back(chan->name);
5100                         params.push_back(user->nick);
5101                         params.push_back(":"+reason);
5102                         Utils->DoOneToMany(source->nick,"KICK",params);
5103                 }
5104                 else if (!source)
5105                 {
5106                         std::deque<std::string> params;
5107                         params.push_back(chan->name);
5108                         params.push_back(user->nick);
5109                         params.push_back(":"+reason);
5110                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"KICK",params);
5111                 }
5112         }
5113
5114         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
5115         {
5116                 std::deque<std::string> params;
5117                 params.push_back(dest->nick);
5118                 params.push_back(":"+reason);
5119                 Utils->DoOneToMany(source->nick,"KILL",params);
5120         }
5121
5122         virtual void OnRehash(const std::string &parameter)
5123         {
5124                 if (parameter != "")
5125                 {
5126                         std::deque<std::string> params;
5127                         params.push_back(parameter);
5128                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"REHASH",params);
5129                         // check for self
5130                         if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameter))
5131                         {
5132                                 ServerInstance->WriteOpers("*** Remote rehash initiated from server \002%s\002",ServerInstance->Config->ServerName);
5133                                 ServerInstance->RehashServer();
5134                         }
5135                 }
5136                 Utils->ReadConfiguration(false);
5137         }
5138
5139         // note: the protocol does not allow direct umode +o except
5140         // via NICK with 8 params. sending OPERTYPE infers +o modechange
5141         // locally.
5142         virtual void OnOper(userrec* user, const std::string &opertype)
5143         {
5144                 if (IS_LOCAL(user))
5145                 {
5146                         std::deque<std::string> params;
5147                         params.push_back(opertype);
5148                         Utils->DoOneToMany(user->nick,"OPERTYPE",params);
5149                 }
5150         }
5151
5152         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
5153         {
5154                 if (!source)
5155                 {
5156                         /* Server-set lines */
5157                         char data[MAXBUF];
5158                         snprintf(data,MAXBUF,"%c %s %s %lu %lu :%s", linetype, host.c_str(), ServerInstance->Config->ServerName, (unsigned long)ServerInstance->Time(false),
5159                                         (unsigned long)duration, reason.c_str());
5160                         std::deque<std::string> params;
5161                         params.push_back(data);
5162                         Utils->DoOneToMany(ServerInstance->Config->ServerName, "ADDLINE", params);
5163                 }
5164                 else
5165                 {
5166                         if (IS_LOCAL(source))
5167                         {
5168                                 char type[8];
5169                                 snprintf(type,8,"%cLINE",linetype);
5170                                 std::string stype = type;
5171                                 if (adding)
5172                                 {
5173                                         char sduration[MAXBUF];
5174                                         snprintf(sduration,MAXBUF,"%ld",duration);
5175                                         std::deque<std::string> params;
5176                                         params.push_back(host);
5177                                         params.push_back(sduration);
5178                                         params.push_back(":"+reason);
5179                                         Utils->DoOneToMany(source->nick,stype,params);
5180                                 }
5181                                 else
5182                                 {
5183                                         std::deque<std::string> params;
5184                                         params.push_back(host);
5185                                         Utils->DoOneToMany(source->nick,stype,params);
5186                                 }
5187                         }
5188                 }
5189         }
5190
5191         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
5192         {
5193                 OnLine(source,hostmask,true,'G',duration,reason);
5194         }
5195
5196         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
5197         {
5198                 OnLine(source,ipmask,true,'Z',duration,reason);
5199         }
5200
5201         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
5202         {
5203                 OnLine(source,nickmask,true,'Q',duration,reason);
5204         }
5205
5206         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
5207         {
5208                 OnLine(source,hostmask,true,'E',duration,reason);
5209         }
5210
5211         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
5212         {
5213                 OnLine(source,hostmask,false,'G',0,"");
5214         }
5215
5216         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
5217         {
5218                 OnLine(source,ipmask,false,'Z',0,"");
5219         }
5220
5221         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
5222         {
5223                 OnLine(source,nickmask,false,'Q',0,"");
5224         }
5225
5226         virtual void OnDelELine(userrec* source, const std::string &hostmask)
5227         {
5228                 OnLine(source,hostmask,false,'E',0,"");
5229         }
5230
5231         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
5232         {
5233                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
5234                 {
5235                         if (target_type == TYPE_USER)
5236                         {
5237                                 userrec* u = (userrec*)dest;
5238                                 std::deque<std::string> params;
5239                                 params.push_back(u->nick);
5240                                 params.push_back(text);
5241                                 Utils->DoOneToMany(user->nick,"MODE",params);
5242                         }
5243                         else
5244                         {
5245                                 chanrec* c = (chanrec*)dest;
5246                                 std::deque<std::string> params;
5247                                 params.push_back(c->name);
5248                                 params.push_back(text);
5249                                 Utils->DoOneToMany(user->nick,"MODE",params);
5250                         }
5251                 }
5252         }
5253
5254         virtual void OnSetAway(userrec* user)
5255         {
5256                 if (IS_LOCAL(user))
5257                 {
5258                         std::deque<std::string> params;
5259                         params.push_back(":"+std::string(user->awaymsg));
5260                         Utils->DoOneToMany(user->nick,"AWAY",params);
5261                 }
5262         }
5263
5264         virtual void OnCancelAway(userrec* user)
5265         {
5266                 if (IS_LOCAL(user))
5267                 {
5268                         std::deque<std::string> params;
5269                         params.clear();
5270                         Utils->DoOneToMany(user->nick,"AWAY",params);
5271                 }
5272         }
5273
5274         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
5275         {
5276                 TreeSocket* s = (TreeSocket*)opaque;
5277                 if (target)
5278                 {
5279                         if (target_type == TYPE_USER)
5280                         {
5281                                 userrec* u = (userrec*)target;
5282                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
5283                         }
5284                         else
5285                         {
5286                                 chanrec* c = (chanrec*)target;
5287                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
5288                         }
5289                 }
5290         }
5291
5292         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
5293         {
5294                 TreeSocket* s = (TreeSocket*)opaque;
5295                 if (target)
5296                 {
5297                         if (target_type == TYPE_USER)
5298                         {
5299                                 userrec* u = (userrec*)target;
5300                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+u->nick+" "+extname+" :"+extdata);
5301                         }
5302                         else if (target_type == TYPE_CHANNEL)
5303                         {
5304                                 chanrec* c = (chanrec*)target;
5305                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+c->name+" "+extname+" :"+extdata);
5306                         }
5307                 }
5308                 if (target_type == TYPE_OTHER)
5309                 {
5310                         s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA * "+extname+" :"+extdata);
5311                 }
5312         }
5313
5314         virtual void OnEvent(Event* event)
5315         {
5316                 std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
5317
5318                 if (event->GetEventID() == "send_metadata")
5319                 {
5320                         if (params->size() < 3)
5321                                 return;
5322                         (*params)[2] = ":" + (*params)[2];
5323                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"METADATA",*params);
5324                 }
5325                 else if (event->GetEventID() == "send_topic")
5326                 {
5327                         if (params->size() < 2)
5328                                 return;
5329                         (*params)[1] = ":" + (*params)[1];
5330                         params->insert(params->begin() + 1,ServerInstance->Config->ServerName);
5331                         params->insert(params->begin() + 1,ConvToStr(ServerInstance->Time(true)));
5332                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FTOPIC",*params);
5333                 }
5334                 else if (event->GetEventID() == "send_mode")
5335                 {
5336                         if (params->size() < 2)
5337                                 return;
5338                         // Insert the TS value of the object, either userrec or chanrec
5339                         time_t ourTS = 0;
5340                         userrec* a = ServerInstance->FindNick((*params)[0]);
5341                         if (a)
5342                         {
5343                                 ourTS = a->age;
5344                         }
5345                         else
5346                         {
5347                                 chanrec* a = ServerInstance->FindChan((*params)[0]);
5348                                 if (a)
5349                                 {
5350                                         ourTS = a->age;
5351                                 }
5352                         }
5353                         params->insert(params->begin() + 1,ConvToStr(ourTS));
5354                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FMODE",*params);
5355                 }
5356                 else if (event->GetEventID() == "send_mode_explicit")
5357                 {
5358                         if (params->size() < 2)
5359                                 return;
5360                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"MODE",*params);
5361                 }
5362                 else if (event->GetEventID() == "send_opers")
5363                 {
5364                         if (params->size() < 1)
5365                                 return;
5366                         (*params)[0] = ":" + (*params)[0];
5367                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"OPERNOTICE",*params);
5368                 }
5369                 else if (event->GetEventID() == "send_modeset")
5370                 {
5371                         if (params->size() < 2)
5372                                 return;
5373                         (*params)[1] = ":" + (*params)[1];
5374                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"MODENOTICE",*params);
5375                 }
5376                 else if (event->GetEventID() == "send_snoset")
5377                 {
5378                         if (params->size() < 2)
5379                                 return;
5380                         (*params)[1] = ":" + (*params)[1];
5381                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"SNONOTICE",*params);
5382                 }
5383                 else if (event->GetEventID() == "send_push")
5384                 {
5385                         if (params->size() < 2)
5386                                 return;
5387
5388                         userrec *a = ServerInstance->FindNick((*params)[0]);
5389
5390                         if (!a)
5391                                 return;
5392
5393                         (*params)[1] = ":" + (*params)[1];
5394                         Utils->DoOneToOne(ServerInstance->Config->ServerName, "PUSH", *params, a->server);
5395                 }
5396         }
5397
5398         virtual ~ModuleSpanningTree()
5399         {
5400                 ServerInstance->Log(DEBUG,"Performing unload of spanningtree!");
5401                 /* This will also free the listeners */
5402                 delete Utils;
5403                 if (SyncTimer)
5404                         ServerInstance->Timers->DelTimer(SyncTimer);
5405         }
5406
5407         virtual Version GetVersion()
5408         {
5409                 return Version(1,1,0,2,VF_VENDOR,API_VERSION);
5410         }
5411
5412         void Implements(char* List)
5413         {
5414                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
5415                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
5416                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
5417                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
5418                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
5419                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
5420                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = List[I_OnPostCommand] = 1;
5421         }
5422
5423         /* It is IMPORTANT that m_spanningtree is the last module in the chain
5424          * so that any activity it sees is FINAL, e.g. we arent going to send out
5425          * a NICK message before m_cloaking has finished putting the +x on the user,
5426          * etc etc.
5427          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
5428          * the module call queue.
5429          */
5430         Priority Prioritize()
5431         {
5432                 return PRIORITY_LAST;
5433         }
5434 };
5435
5436 TimeSyncTimer::TimeSyncTimer(InspIRCd *Inst, ModuleSpanningTree *Mod) : InspTimer(43200, Inst->Time()), Instance(Inst), Module(Mod)
5437 {
5438 }
5439
5440 void TimeSyncTimer::Tick(time_t TIME)
5441 {
5442         Module->BroadcastTimeSync();
5443         Module->SyncTimer = new TimeSyncTimer(Instance, Module);
5444         Instance->Timers->AddTimer(Module->SyncTimer);
5445 }
5446
5447 void SpanningTreeUtilities::DoFailOver(Link* x)
5448 {
5449         if (x->FailOver.length())
5450         {
5451                 if (x->FailOver == x->Name)
5452                 {
5453                         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());
5454                         return;
5455                 }
5456                 Link* TryThisOne = this->FindLink(x->FailOver.c_str());
5457                 if (TryThisOne)
5458                 {
5459                         ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Trying failover link for \002%s\002: \002%s\002...", x->Name.c_str(), TryThisOne->Name.c_str());
5460                         Creator->ConnectServer(TryThisOne);
5461                 }
5462                 else
5463                 {
5464                         ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Invalid failover server specified for server \002%s\002, will not follow!", x->Name.c_str());
5465                 }
5466         }
5467 }
5468
5469 Link* SpanningTreeUtilities::FindLink(const std::string& name)
5470 {
5471         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
5472         {
5473                 if (ServerInstance->MatchText(x->Name.c_str(), name.c_str()))
5474                 {
5475                         return &(*x);
5476                 }
5477         }
5478         return NULL;
5479 }
5480
5481 class ModuleSpanningTreeFactory : public ModuleFactory
5482 {
5483  public:
5484         ModuleSpanningTreeFactory()
5485         {
5486         }
5487
5488         ~ModuleSpanningTreeFactory()
5489         {
5490         }
5491
5492         virtual Module * CreateModule(InspIRCd* Me)
5493         {
5494                 return new ModuleSpanningTree(Me);
5495         }
5496
5497 };
5498
5499
5500 extern "C" void * init_module( void )
5501 {
5502         return new ModuleSpanningTreeFactory;
5503 }