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