src/modules/m_spanningtree.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 /* $ModDesc: Povides a spanning tree server link protocol */
  15
  16 #include "configreader.h"
  17 #include "users.h"
  18 #include "channels.h"
  19 #include "modules.h"
  20 #include "commands/cmd_whois.h"
  21 #include "commands/cmd_stats.h"
  22 #include "socket.h"
  23 #include "inspircd.h"
  24 #include "wildcard.h"
  25 #include "xline.h"
  26 #include "transport.h"
  27
  28 /** If you make a change which breaks the protocol, increment this.
  29  * If you  completely change the protocol, completely change the number.
  30  *
  31  * IMPORTANT: If you make changes, document your changes here, without fail:
  32  * http://www.inspircd.org/wiki/List_of_protocol_changes_between_versions
  33  *
  34  * Failure to document your protocol changes will result in a painfully
  35  * painful death by pain. You have been warned.
  36  */
  37 const long ProtocolVersion = 1103;
  38
  39 /*
  40  * The server list in InspIRCd is maintained as two structures
  41  * which hold the data in different ways. Most of the time, we
  42  * want to very quicky obtain three pieces of information:
  43  *
  44  * (1) The information on a server
  45  * (2) The information on the server we must send data through
  46  *     to actually REACH the server we're after
  47  * (3) Potentially, the child/parent objects of this server
  48  *
  49  * The InspIRCd spanning protocol provides easy access to these
  50  * by storing the data firstly in a recursive structure, where
  51  * each item references its parent item, and a dynamic list
  52  * of child items, and another structure which stores the items
  53  * hashed, linearly. This means that if we want to find a server
  54  * by name quickly, we can look it up in the hash, avoiding
  55  * any O(n) lookups. If however, during a split or sync, we want
  56  * to apply an operation to a server, and any of its child objects
  57  * we can resort to recursion to walk the tree structure.
  58  * Any socket can have one of five states at any one time.
  59  * The LISTENER state indicates a socket which is listening
  60  * for connections. It cannot receive data itself, only incoming
  61  * sockets.
  62  * The CONNECTING state indicates an outbound socket which is
  63  * waiting to be writeable.
  64  * The WAIT_AUTH_1 state indicates the socket is outbound and
  65  * has successfully connected, but has not yet sent and received
  66  * SERVER strings.
  67  * The WAIT_AUTH_2 state indicates that the socket is inbound
  68  * (allocated by a LISTENER) but has not yet sent and received
  69  * SERVER strings.
  70  * The CONNECTED state represents a fully authorized, fully
  71  * connected server.
  72  */
  73 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  74
  75 /* Foward declarations */
  76 class TreeServer;
  77 class TreeSocket;
  78 class Link;
  79 class ModuleSpanningTree;
  80 class SpanningTreeUtilities;
  81
  82 /* This hash_map holds the hash equivalent of the server
  83  * tree, used for rapid linear lookups.
  84  */
  85 typedef nspace::hash_map<std::string, TreeServer*, nspace::hash<string>, irc::StrHashComp> server_hash;
  86
  87 typedef std::map<TreeServer*,TreeServer*> TreeServerList;
  88
  89 /** A group of modules that implement InspSocketHook
  90  * that we can use to hook our server to server connections.
  91  */
  92 typedef std::map<irc::string, Module*> hookmodules;
  93
  94 /** The Link class might as well be a struct,
  95  * but this is C++ and we don't believe in structs (!).
  96  * It holds the entire information of one <link>
  97  * tag from the main config file. We maintain a list
  98  * of them, and populate the list on rehash/load.
  99  */
 100 class Link : public classbase
 101 {
 102  public:
 103         irc::string Name;
 104         std::string IPAddr;
 105         int Port;
 106         std::string SendPass;
 107         std::string RecvPass;
 108         unsigned long AutoConnect;
 109         time_t NextConnectTime;
 110         bool HiddenFromStats;
 111         std::string FailOver;
 112         std::string Hook;
 113         int Timeout;
 114 };
 115
 116 class HandshakeTimer : public InspTimer
 117 {
 118  private:
 119         InspIRCd* Instance;
 120         TreeSocket* sock;
 121         Link* lnk;
 122         SpanningTreeUtilities* Utils;
 123         int thefd;
 124  public:
 125         HandshakeTimer(InspIRCd* Inst, TreeSocket* s, Link* l, SpanningTreeUtilities* u);
 126         virtual void Tick(time_t TIME);
 127 };
 128
 129
 130 /** Contains helper functions and variables for this module,
 131  * and keeps them out of the global namespace
 132  */
 133 class SpanningTreeUtilities
 134 {
 135  private:
 136         /** Creator server
 137          */
 138         InspIRCd* ServerInstance;
 139  public:
 140         /** Creator module
 141          */
 142         ModuleSpanningTree* Creator;
 143         /** Flatten links and /MAP for non-opers
 144          */
 145         bool FlatLinks;
 146         /** Hide U-Lined servers in /MAP and /LINKS
 147          */
 148         bool HideULines;
 149         /** Announce TS changes to channels on merge
 150          */
 151         bool AnnounceTSChange;
 152         /** Synchronize timestamps between servers
 153          */
 154         bool EnableTimeSync;
 155         /** Socket bindings for listening sockets
 156          */
 157         std::vector<TreeSocket*> Bindings;
 158         /** This variable represents the root of the server tree
 159          */
 160         TreeServer *TreeRoot;
 161         /** IPs allowed to link to us
 162          */
 163         std::vector<std::string> ValidIPs;
 164         /** Hash of currently connected servers by name
 165          */
 166         server_hash serverlist;
 167         /** Holds the data from the <link> tags in the conf
 168          */
 169         std::vector<Link> LinkBlocks;
 170
 171         hookmodules hooks;
 172         std::vector<std::string> hooknames;
 173
 174         /** Initialise utility class
 175          */
 176         SpanningTreeUtilities(InspIRCd* Instance, ModuleSpanningTree* Creator);
 177         /** Destroy class and free listeners etc
 178          */
 179         ~SpanningTreeUtilities();
 180         /** Send a message from this server to one other local or remote
 181          */
 182         bool DoOneToOne(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string target);
 183         /** Send a message from this server to all but one other, local or remote
 184          */
 185         bool DoOneToAllButSender(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string omit);
 186         /** Send a message from this server to all but one other, local or remote
 187          */
 188         bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit);
 189         /** Send a message from this server to all others
 190          */
 191         bool DoOneToMany(const std::string &prefix, const std::string &command, std::deque<std::string> &params);
 192         /** Send a message from this server to all others
 193          */
 194         bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params);
 195         /** Send a message from this server to all others, without doing any processing on the command (e.g. send it as-is with colons and all)
 196          */
 197         bool DoOneToAllButSenderRaw(const std::string &data, const std::string &omit, const std::string &prefix, const irc::string &command, std::deque<std::string> &params);
 198         /** Read the spanningtree module's tags from the config file
 199          */
 200         void ReadConfiguration(bool rebind);
 201         /** Add a server to the server list for GetListOfServersForChannel
 202          */
 203         void AddThisServer(TreeServer* server, TreeServerList &list);
 204         /** Compile a list of servers which contain members of channel c
 205          */
 206         void GetListOfServersForChannel(chanrec* c, TreeServerList &list, char status, const CUList &exempt_list);
 207         /** Find a server by name
 208          */
 209         TreeServer* FindServer(const std::string &ServerName);
 210         /** Find a route to a server by name
 211          */
 212         TreeServer* BestRouteTo(const std::string &ServerName);
 213         /** Find a server by glob mask
 214          */
 215         TreeServer* FindServerMask(const std::string &ServerName);
 216         /** Returns true if this is a server name we recognise
 217          */
 218         bool IsServer(const std::string &ServerName);
 219         /** Attempt to connect to the failover link of link x
 220          */
 221         void DoFailOver(Link* x);
 222         /** Find a link tag from a server name
 223          */
 224         Link* FindLink(const std::string& name);
 225 };
 226
 227
 228 /** Each server in the tree is represented by one class of
 229  * type TreeServer. A locally connected TreeServer can
 230  * have a class of type TreeSocket associated with it, for
 231  * remote servers, the TreeSocket entry will be NULL.
 232  * Each server also maintains a pointer to its parent
 233  * (NULL if this server is ours, at the top of the tree)
 234  * and a pointer to its "Route" (see the comments in the
 235  * constructors below), and also a dynamic list of pointers
 236  * to its children which can be iterated recursively
 237  * if required. Creating or deleting objects of type
 238  i* TreeServer automatically maintains the hash_map of
 239  * TreeServer items, deleting and inserting them as they
 240  * are created and destroyed.
 241  */
 242 class TreeServer : public classbase
 243 {
 244         InspIRCd* ServerInstance;               /* Creator */
 245         TreeServer* Parent;                     /* Parent entry */
 246         TreeServer* Route;                      /* Route entry */
 247         std::vector<TreeServer*> Children;      /* List of child objects */
 248         irc::string ServerName;                 /* Server's name */
 249         std::string ServerDesc;                 /* Server's description */
 250         std::string VersionString;              /* Version string or empty string */
 251         int UserCount;                          /* Not used in this version */
 252         int OperCount;                          /* Not used in this version */
 253         TreeSocket* Socket;                     /* For directly connected servers this points at the socket object */
 254         time_t NextPing;                        /* After this time, the server should be PINGed*/
 255         bool LastPingWasGood;                   /* True if the server responded to the last PING with a PONG */
 256         SpanningTreeUtilities* Utils;           /* Utility class */
 257
 258  public:
 259
 260         /** We don't use this constructor. Its a dummy, and won't cause any insertion
 261          * of the TreeServer into the hash_map. See below for the two we DO use.
 262          */
 263         TreeServer(SpanningTreeUtilities* Util, InspIRCd* Instance) : ServerInstance(Instance), Utils(Util)
 264         {
 265                 Parent = NULL;
 266                 ServerName = "";
 267                 ServerDesc = "";
 268                 VersionString = "";
 269                 UserCount = OperCount = 0;
 270                 VersionString = ServerInstance->GetVersionString();
 271         }
 272
 273         /** We use this constructor only to create the 'root' item, Utils->TreeRoot, which
 274          * represents our own server. Therefore, it has no route, no parent, and
 275          * no socket associated with it. Its version string is our own local version.
 276          */
 277         TreeServer(SpanningTreeUtilities* Util, InspIRCd* Instance, std::string Name, std::string Desc) : ServerInstance(Instance), ServerName(Name.c_str()), ServerDesc(Desc), Utils(Util)
 278         {
 279                 Parent = NULL;
 280                 VersionString = "";
 281                 UserCount = ServerInstance->UserCount();
 282                 OperCount = ServerInstance->OperCount();
 283                 VersionString = ServerInstance->GetVersionString();
 284                 Route = NULL;
 285                 Socket = NULL; /* Fix by brain */
 286                 AddHashEntry();
 287         }
 288
 289         /** When we create a new server, we call this constructor to initialize it.
 290          * This constructor initializes the server's Route and Parent, and sets up
 291          * its ping counters so that it will be pinged one minute from now.
 292          */
 293         TreeServer(SpanningTreeUtilities* Util, InspIRCd* Instance, std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock)
 294                 : ServerInstance(Instance), Parent(Above), ServerName(Name.c_str()), ServerDesc(Desc), Socket(Sock), Utils(Util)
 295         {
 296                 VersionString = "";
 297                 UserCount = OperCount = 0;
 298                 this->SetNextPingTime(time(NULL) + 60);
 299                 this->SetPingFlag();
 300
 301                 /* find the 'route' for this server (e.g. the one directly connected
 302                  * to the local server, which we can use to reach it)
 303                  *
 304                  * In the following example, consider we have just added a TreeServer
 305                  * class for server G on our network, of which we are server A.
 306                  * To route traffic to G (marked with a *) we must send the data to
 307                  * B (marked with a +) so this algorithm initializes the 'Route'
 308                  * value to point at whichever server traffic must be routed through
 309                  * to get here. If we were to try this algorithm with server B,
 310                  * the Route pointer would point at its own object ('this').
 311                  *
 312                  *              A
 313                  *             / \
 314                  *          + B   C
 315                  *           / \   \
 316                  *          D   E   F
 317                  *         /         \
 318                  *      * G           H
 319                  *
 320                  * We only run this algorithm when a server is created, as
 321                  * the routes remain constant while ever the server exists, and
 322                  * do not need to be re-calculated.
 323                  */
 324
 325                 Route = Above;
 326                 if (Route == Utils->TreeRoot)
 327                 {
 328                         Route = this;
 329                 }
 330                 else
 331                 {
 332                         while (this->Route->GetParent() != Utils->TreeRoot)
 333                         {
 334                                 this->Route = Route->GetParent();
 335                         }
 336                 }
 337
 338                 /* Because recursive code is slow and takes a lot of resources,
 339                  * we store two representations of the server tree. The first
 340                  * is a recursive structure where each server references its
 341                  * children and its parent, which is used for netbursts and
 342                  * netsplits to dump the whole dataset to the other server,
 343                  * and the second is used for very fast lookups when routing
 344                  * messages and is instead a hash_map, where each item can
 345                  * be referenced by its server name. The AddHashEntry()
 346                  * call below automatically inserts each TreeServer class
 347                  * into the hash_map as it is created. There is a similar
 348                  * maintainance call in the destructor to tidy up deleted
 349                  * servers.
 350                  */
 351
 352                 this->AddHashEntry();
 353         }
 354
 355         int QuitUsers(const std::string &reason)
 356         {
 357                 ServerInstance->Log(DEBUG,"Removing all users from server %s",this->ServerName.c_str());
 358                 const char* reason_s = reason.c_str();
 359                 std::vector<userrec*> time_to_die;
 360                 for (user_hash::iterator n = ServerInstance->clientlist->begin(); n != ServerInstance->clientlist->end(); n++)
 361                 {
 362                         if (!strcmp(n->second->server, this->ServerName.c_str()))
 363                         {
 364                                 time_to_die.push_back(n->second);
 365                         }
 366                 }
 367                 for (std::vector<userrec*>::iterator n = time_to_die.begin(); n != time_to_die.end(); n++)
 368                 {
 369                         userrec* a = (userrec*)*n;
 370                         ServerInstance->Log(DEBUG,"Kill %s fd=%d",a->nick,a->GetFd());
 371                         if (!IS_LOCAL(a))
 372                                 userrec::QuitUser(ServerInstance,a,reason_s);
 373                 }
 374                 return time_to_die.size();
 375         }
 376
 377         /** This method is used to add the structure to the
 378          * hash_map for linear searches. It is only called
 379          * by the constructors.
 380          */
 381         void AddHashEntry()
 382         {
 383                 server_hash::iterator iter = Utils->serverlist.find(this->ServerName.c_str());
 384                 if (iter == Utils->serverlist.end())
 385                         Utils->serverlist[this->ServerName.c_str()] = this;
 386         }
 387
 388         /** This method removes the reference to this object
 389          * from the hash_map which is used for linear searches.
 390          * It is only called by the default destructor.
 391          */
 392         void DelHashEntry()
 393         {
 394                 server_hash::iterator iter = Utils->serverlist.find(this->ServerName.c_str());
 395                 if (iter != Utils->serverlist.end())
 396                         Utils->serverlist.erase(iter);
 397         }
 398
 399         /** These accessors etc should be pretty self-
 400          * explanitory.
 401          */
 402         TreeServer* GetRoute()
 403         {
 404                 return Route;
 405         }
 406
 407         std::string GetName()
 408         {
 409                 return ServerName.c_str();
 410         }
 411
 412         std::string GetDesc()
 413         {
 414                 return ServerDesc;
 415         }
 416
 417         std::string GetVersion()
 418         {
 419                 return VersionString;
 420         }
 421
 422         void SetNextPingTime(time_t t)
 423         {
 424                 this->NextPing = t;
 425                 LastPingWasGood = false;
 426         }
 427
 428         time_t NextPingTime()
 429         {
 430                 return NextPing;
 431         }
 432
 433         bool AnsweredLastPing()
 434         {
 435                 return LastPingWasGood;
 436         }
 437
 438         void SetPingFlag()
 439         {
 440                 LastPingWasGood = true;
 441         }
 442
 443         int GetUserCount()
 444         {
 445                 return UserCount;
 446         }
 447
 448         void AddUserCount()
 449         {
 450                 UserCount++;
 451         }
 452
 453         void DelUserCount()
 454         {
 455                 UserCount--;
 456         }
 457
 458         int GetOperCount()
 459         {
 460                 return OperCount;
 461         }
 462
 463         TreeSocket* GetSocket()
 464         {
 465                 return Socket;
 466         }
 467
 468         TreeServer* GetParent()
 469         {
 470                 return Parent;
 471         }
 472
 473         void SetVersion(const std::string &Version)
 474         {
 475                 VersionString = Version;
 476         }
 477
 478         unsigned int ChildCount()
 479         {
 480                 return Children.size();
 481         }
 482
 483         TreeServer* GetChild(unsigned int n)
 484         {
 485                 if (n < Children.size())
 486                 {
 487                         /* Make sure they  cant request
 488                          * an out-of-range object. After
 489                          * all we know what these programmer
 490                          * types are like *grin*.
 491                          */
 492                         return Children[n];
 493                 }
 494                 else
 495                 {
 496                         return NULL;
 497                 }
 498         }
 499
 500         void AddChild(TreeServer* Child)
 501         {
 502                 Children.push_back(Child);
 503         }
 504
 505         bool DelChild(TreeServer* Child)
 506         {
 507                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 508                 {
 509                         if (*a == Child)
 510                         {
 511                                 Children.erase(a);
 512                                 return true;
 513                         }
 514                 }
 515                 return false;
 516         }
 517
 518         /** Removes child nodes of this node, and of that node, etc etc.
 519          * This is used during netsplits to automatically tidy up the
 520          * server tree. It is slow, we don't use it for much else.
 521          */
 522         bool Tidy()
 523         {
 524                 bool stillchildren = true;
 525                 while (stillchildren)
 526                 {
 527                         stillchildren = false;
 528                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 529                         {
 530                                 TreeServer* s = (TreeServer*)*a;
 531                                 s->Tidy();
 532                                 Children.erase(a);
 533                                 DELETE(s);
 534                                 stillchildren = true;
 535                                 break;
 536                         }
 537                 }
 538                 return true;
 539         }
 540
 541         ~TreeServer()
 542         {
 543                 /* We'd better tidy up after ourselves, eh? */
 544                 this->DelHashEntry();
 545         }
 546 };
 547
 548 /** Yay for fast searches!
 549  * This is hundreds of times faster than recursion
 550  * or even scanning a linked list, especially when
 551  * there are more than a few servers to deal with.
 552  * (read as: lots).
 553  */
 554 TreeServer* SpanningTreeUtilities::FindServer(const std::string &ServerName)
 555 {
 556         server_hash::iterator iter;
 557         iter = serverlist.find(ServerName.c_str());
 558         if (iter != serverlist.end())
 559         {
 560                 return iter->second;
 561         }
 562         else
 563         {
 564                 return NULL;
 565         }
 566 }
 567
 568 /** Returns the locally connected server we must route a
 569  * message through to reach server 'ServerName'. This
 570  * only applies to one-to-one and not one-to-many routing.
 571  * See the comments for the constructor of TreeServer
 572  * for more details.
 573  */
 574 TreeServer* SpanningTreeUtilities::BestRouteTo(const std::string &ServerName)
 575 {
 576         if (ServerName.c_str() == TreeRoot->GetName())
 577                 return NULL;
 578         TreeServer* Found = FindServer(ServerName);
 579         if (Found)
 580         {
 581                 return Found->GetRoute();
 582         }
 583         else
 584         {
 585                 return NULL;
 586         }
 587 }
 588
 589 /** Find the first server matching a given glob mask.
 590  * Theres no find-using-glob method of hash_map [awwww :-(]
 591  * so instead, we iterate over the list using an iterator
 592  * and match each one until we get a hit. Yes its slow,
 593  * deal with it.
 594  */
 595 TreeServer* SpanningTreeUtilities::FindServerMask(const std::string &ServerName)
 596 {
 597         for (server_hash::iterator i = serverlist.begin(); i != serverlist.end(); i++)
 598         {
 599                 if (match(i->first.c_str(),ServerName.c_str()))
 600                         return i->second;
 601         }
 602         return NULL;
 603 }
 604
 605 /* A convenient wrapper that returns true if a server exists */
 606 bool SpanningTreeUtilities::IsServer(const std::string &ServerName)
 607 {
 608         return (FindServer(ServerName) != NULL);
 609 }
 610
 611
 612 /** Handle /RCONNECT
 613  */
 614 class cmd_rconnect : public command_t
 615 {
 616         Module* Creator;
 617         SpanningTreeUtilities* Utils;
 618  public:
 619         cmd_rconnect (InspIRCd* Instance, Module* Callback, SpanningTreeUtilities* Util) : command_t(Instance, "RCONNECT", 'o', 2), Creator(Callback), Utils(Util)
 620         {
 621                 this->source = "m_spanningtree.so";
 622                 syntax = "<remote-server-mask> <target-server-mask>";
 623         }
 624
 625         CmdResult Handle (const char** parameters, int pcnt, userrec *user)
 626         {
 627                 if (IS_LOCAL(user))
 628                 {
 629                         if (!Utils->FindServer(parameters[0]))
 630                         {
 631                                 user->WriteServ("NOTICE %s :*** RCONNECT: Server \002%s\002 isn't connected to the network!", user->nick, parameters[0]);
 632                                 return CMD_FAILURE;
 633                         }
 634
 635                         user->WriteServ("NOTICE %s :*** RCONNECT: Sending remote connect to \002%s\002 to connect server \002%s\002.",user->nick,parameters[0],parameters[1]);
 636                 }
 637
 638                 /* Is this aimed at our server? */
 639                 if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameters[0]))
 640                 {
 641                         /* Yes, initiate the given connect */
 642                         ServerInstance->SNO->WriteToSnoMask('l',"Remote CONNECT from %s matching \002%s\002, connecting server \002%s\002",user->nick,parameters[0],parameters[1]);
 643                         const char* para[1];
 644                         para[0] = parameters[1];
 645                         std::string original_command = std::string("CONNECT ") + parameters[1];
 646                         Creator->OnPreCommand("CONNECT", para, 1, user, true, original_command);
 647                 }
 648
 649                 return CMD_SUCCESS;
 650         }
 651 };
 652
 653
 654
 655 /** Every SERVER connection inbound or outbound is represented by
 656  * an object of type TreeSocket.
 657  * TreeSockets, being inherited from InspSocket, can be tied into
 658  * the core socket engine, and we cn therefore receive activity events
 659  * for them, just like activex objects on speed. (yes really, that
 660  * is a technical term!) Each of these which relates to a locally
 661  * connected server is assocated with it, by hooking it onto a
 662  * TreeSocket class using its constructor. In this way, we can
 663  * maintain a list of servers, some of which are directly connected,
 664  * some of which are not.
 665  */
 666 class TreeSocket : public InspSocket
 667 {
 668         SpanningTreeUtilities* Utils;
 669         std::string myhost;
 670         std::string in_buffer;
 671         ServerState LinkState;
 672         std::string InboundServerName;
 673         std::string InboundDescription;
 674         int num_lost_users;
 675         int num_lost_servers;
 676         time_t NextPing;
 677         bool LastPingWasGood;
 678         bool bursting;
 679         unsigned int keylength;
 680         std::string ModuleList;
 681         std::map<std::string,std::string> CapKeys;
 682         Module* Hook;
 683
 684  public:
 685
 686         /** Because most of the I/O gubbins are encapsulated within
 687          * InspSocket, we just call the superclass constructor for
 688          * most of the action, and append a few of our own values
 689          * to it.
 690          */
 691         TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, Module* HookMod = NULL)
 692                 : InspSocket(SI, host, port, listening, maxtime), Utils(Util), Hook(HookMod)
 693         {
 694                 myhost = host;
 695                 this->LinkState = LISTENER;
 696
 697                 Instance->Log(DEBUG, "HOOK = %08x", Hook);
 698
 699                 if (listening && Hook)
 700                         InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
 701         }
 702
 703         TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName, Module* HookMod = NULL)
 704                 : InspSocket(SI, host, port, listening, maxtime), Utils(Util), Hook(HookMod)
 705         {
 706                 myhost = ServerName;
 707                 this->LinkState = CONNECTING;
 708
 709                 if (Hook)
 710                         InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
 711         }
 712
 713         /** When a listening socket gives us a new file descriptor,
 714          * we must associate it with a socket without creating a new
 715          * connection. This constructor is used for this purpose.
 716          */
 717         TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, int newfd, char* ip, Module* HookMod = NULL)
 718                 : InspSocket(SI, newfd, ip), Utils(Util), Hook(HookMod)
 719         {
 720                 this->LinkState = WAIT_AUTH_1;
 721
 722                 /* If we have a transport module hooked to the parent, hook the same module to this
 723                  * socket, and set a timer waiting for handshake before we send CAPAB etc.
 724                  */
 725                 if (Hook)
 726                 {
 727                         InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
 728                         Instance->Timers->AddTimer(new HandshakeTimer(Instance, this, &(Utils->LinkBlocks[0]), this->Utils));
 729                 }
 730                 else
 731                 {
 732                         /* Otherwise, theres no lower layer transport in plain TCP/IP,
 733                          * so just send the capabilities right now.
 734                          */
 735                         this->SendCapabilities();
 736                 }
 737         }
 738
 739         ServerState GetLinkState()
 740         {
 741                 return this->LinkState;
 742         }
 743
 744         Module* GetHook()
 745         {
 746                 return this->Hook;
 747         }
 748
 749         ~TreeSocket()
 750         {
 751                 if (Hook)
 752                         InspSocketUnhookRequest(this, (Module*)Utils->Creator, Hook).Send();
 753         }
 754
 755         /** When an outbound connection finishes connecting, we receive
 756          * this event, and must send our SERVER string to the other
 757          * side. If the other side is happy, as outlined in the server
 758          * to server docs on the inspircd.org site, the other side
 759          * will then send back its own server string.
 760          */
 761         virtual bool OnConnected()
 762         {
 763                 if (this->LinkState == CONNECTING)
 764                 {
 765                         /* we do not need to change state here. */
 766                         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 767                         {
 768                                 if (x->Name == this->myhost)
 769                                 {
 770                                         this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] started.");
 771
 772                                         if (Hook)
 773                                         {
 774                                                 InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
 775                                                 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] using transport \2"+x->Hook+"\2");
 776                                         }
 777                                         else
 778                                                 this->SendCapabilities();
 779
 780                                         /* found who we're supposed to be connecting to, send the neccessary gubbins. */
 781                                         if (Hook)
 782                                                 Instance->Timers->AddTimer(new HandshakeTimer(Instance, this, &(*x), this->Utils));
 783                                         else
 784                                                 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
 785
 786                                         return true;
 787                                 }
 788                         }
 789                 }
 790                 /* There is a (remote) chance that between the /CONNECT and the connection
 791                  * being accepted, some muppet has removed the <link> block and rehashed.
 792                  * If that happens the connection hangs here until it's closed. Unlikely
 793                  * and rather harmless.
 794                  */
 795                 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2 lost link tag(!)");
 796                 return true;
 797         }
 798
 799         virtual void OnError(InspSocketError e)
 800         {
 801                 /* We don't handle this method, because all our
 802                  * dirty work is done in OnClose() (see below)
 803                  * which is still called on error conditions too.
 804                  */
 805                 if (e == I_ERR_CONNECT)
 806                 {
 807                         this->Instance->SNO->WriteToSnoMask('l',"Connection failed: Connection to \002"+myhost+"\002 refused");
 808                         Link* MyLink = Utils->FindLink(myhost);
 809                         if (MyLink)
 810                                 Utils->DoFailOver(MyLink);
 811                 }
 812         }
 813
 814         virtual int OnDisconnect()
 815         {
 816                 /* For the same reason as above, we don't
 817                  * handle OnDisconnect()
 818                  */
 819                 return true;
 820         }
 821
 822         /** Recursively send the server tree with distances as hops.
 823          * This is used during network burst to inform the other server
 824          * (and any of ITS servers too) of what servers we know about.
 825          * If at any point any of these servers already exist on the other
 826          * end, our connection may be terminated. The hopcounts given
 827          * by this function are relative, this doesn't matter so long as
 828          * they are all >1, as all the remote servers re-calculate them
 829          * to be relative too, with themselves as hop 0.
 830          */
 831         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 832         {
 833                 char command[1024];
 834                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 835                 {
 836                         TreeServer* recursive_server = Current->GetChild(q);
 837                         if (recursive_server != s)
 838                         {
 839                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 840                                 this->WriteLine(command);
 841                                 this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
 842                                 /* down to next level */
 843                                 this->SendServers(recursive_server, s, hops+1);
 844                         }
 845                 }
 846         }
 847
 848         std::string MyCapabilities()
 849         {
 850                 std::vector<std::string> modlist;
 851                 std::string capabilities = "";
 852
 853                 for (int i = 0; i <= this->Instance->GetModuleCount(); i++)
 854                 {
 855                         if (this->Instance->modules[i]->GetVersion().Flags & VF_COMMON)
 856                                 modlist.push_back(this->Instance->Config->module_names[i]);
 857                 }
 858                 sort(modlist.begin(),modlist.end());
 859                 for (unsigned int i = 0; i < modlist.size(); i++)
 860                 {
 861                         if (i)
 862                                 capabilities = capabilities + ",";
 863                         capabilities = capabilities + modlist[i];
 864                 }
 865                 return capabilities;
 866         }
 867
 868         void SendCapabilities()
 869         {
 870                 irc::commasepstream modulelist(MyCapabilities());
 871
 872                 this->WriteLine("CAPAB START");
 873
 874                 /* Send module names, split at 509 length */
 875                 std::string item = "*";
 876                 std::string line = "CAPAB MODULES ";
 877                 while ((item = modulelist.GetToken()) != "")
 878                 {
 879                         if (line.length() + item.length() + 1 > 509)
 880                         {
 881                                 this->WriteLine(line);
 882                                 line = "CAPAB MODULES ";
 883                         }
 884
 885                         if (line != "CAPAB MODULES ")
 886                                 line.append(",");
 887
 888                         line.append(item);
 889                 }
 890                 if (line != "CAPAB MODULES ")
 891                         this->WriteLine(line);
 892
 893                 int ip6 = 0;
 894                 int ip6support = 0;
 895 #ifdef IPV6
 896                 ip6 = 1;
 897 #endif
 898 #ifdef SUPPORT_IP6LINKS
 899                 ip6support = 1;
 900 #endif
 901                 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));
 902
 903                 this->WriteLine("CAPAB END");
 904         }
 905
 906         /* Check a comma seperated list for an item */
 907         bool HasItem(const std::string &list, const std::string &item)
 908         {
 909                 irc::commasepstream seplist(list);
 910
 911                 std::string item2 = "*";
 912                 while ((item2 = seplist.GetToken()) != "")
 913                 {
 914                         if (item2 == item)
 915                                 return true;
 916                 }
 917
 918                 return false;
 919         }
 920
 921         /* Isolate and return the elements that are different between two comma seperated lists */
 922         std::string ListDifference(const std::string &one, const std::string &two)
 923         {
 924                 irc::commasepstream list_one(one);
 925                 std::string item = "*";
 926                 std::string result = "";
 927                 while ((item = list_one.GetToken()) != "")
 928                 {
 929                         if (!HasItem(two, item))
 930                         {
 931                                 result.append(" ");
 932                                 result.append(item);
 933                         }
 934                 }
 935                 return result;
 936         }
 937
 938         bool Capab(const std::deque<std::string> &params)
 939         {
 940                 if (params.size() < 1)
 941                 {
 942                         this->WriteLine("ERROR :Invalid number of parameters for CAPAB - Mismatched version");
 943                         return false;
 944                 }
 945
 946                 if (params[0] == "START")
 947                 {
 948                         this->ModuleList = "";
 949                         this->CapKeys.clear();
 950                 }
 951                 else if (params[0] == "END")
 952                 {
 953                         std::string reason = "";
 954                         int ip6support = 0;
 955 #ifdef SUPPORT_IP6LINKS
 956                         ip6support = 1;
 957 #endif
 958                         /* Compare ModuleList and check CapKeys...
 959                          * Maybe this could be tidier? -- Brain
 960                          */
 961                         if ((this->ModuleList != this->MyCapabilities()) && (this->ModuleList.length()))
 962                         {
 963                                 std::string diff = ListDifference(this->ModuleList, this->MyCapabilities());
 964                                 if (!diff.length())
 965                                 {
 966                                         diff = "your server:" + ListDifference(this->MyCapabilities(), this->ModuleList);
 967                                 }
 968                                 else
 969                                 {
 970                                         diff = "this server:" + diff;
 971                                 }
 972                                 if (diff.length() == 12)
 973                                         reason = "Module list in CAPAB is not alphabetically ordered, cannot compare lists.";
 974                                 else
 975                                         reason = "Modules loaded on these servers are not correctly matched, these modules are not loaded on " + diff;
 976                         }
 977
 978                         if (((this->CapKeys.find("IP6SUPPORT") == this->CapKeys.end()) && (ip6support)) || ((this->CapKeys.find("IP6SUPPORT") != this->CapKeys.end()) && (this->CapKeys.find("IP6SUPPORT")->second != ConvToStr(ip6support))))
 979                                 reason = "We don't both support linking to IPV6 servers";
 980
 981                         if (((this->CapKeys.find("IP6NATIVE") != this->CapKeys.end()) && (this->CapKeys.find("IP6NATIVE")->second == "1")) && (!ip6support))
 982                                 reason = "The remote server is IPV6 native, and we don't support linking to IPV6 servers";
 983
 984                         if (((this->CapKeys.find("NICKMAX") == this->CapKeys.end()) || ((this->CapKeys.find("NICKMAX") != this->CapKeys.end()) && (this->CapKeys.find("NICKMAX")->second != ConvToStr(NICKMAX)))))
 985                                 reason = "Maximum nickname lengths differ or remote nickname length not specified";
 986
 987                         if (((this->CapKeys.find("PROTOCOL") == this->CapKeys.end()) || ((this->CapKeys.find("PROTOCOL") != this->CapKeys.end()) && (this->CapKeys.find("PROTOCOL")->second != ConvToStr(ProtocolVersion)))))
 988                         {
 989                                 if (this->CapKeys.find("PROTOCOL") != this->CapKeys.end())
 990                                 {
 991                                         reason = "Mismatched protocol versions "+this->CapKeys.find("PROTOCOL")->second+" and "+ConvToStr(ProtocolVersion);
 992                                 }
 993                                 else
 994                                 {
 995                                         reason = "Protocol version not specified";
 996                                 }
 997                         }
 998
 999                         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))))
1000                                 reason = "We don't both have halfop support enabled/disabled identically";
1001
1002                         if (((this->CapKeys.find("IDENTMAX") == this->CapKeys.end()) || ((this->CapKeys.find("IDENTMAX") != this->CapKeys.end()) && (this->CapKeys.find("IDENTMAX")->second != ConvToStr(IDENTMAX)))))
1003                                 reason = "Maximum ident lengths differ or remote ident length not specified";
1004
1005                         if (((this->CapKeys.find("CHANMAX") == this->CapKeys.end()) || ((this->CapKeys.find("CHANMAX") != this->CapKeys.end()) && (this->CapKeys.find("CHANMAX")->second != ConvToStr(CHANMAX)))))
1006                                 reason = "Maximum channel lengths differ or remote channel length not specified";
1007
1008                         if (((this->CapKeys.find("MAXMODES") == this->CapKeys.end()) || ((this->CapKeys.find("MAXMODES") != this->CapKeys.end()) && (this->CapKeys.find("MAXMODES")->second != ConvToStr(MAXMODES)))))
1009                                 reason = "Maximum modes per line differ or remote modes per line not specified";
1010
1011                         if (((this->CapKeys.find("MAXQUIT") == this->CapKeys.end()) || ((this->CapKeys.find("MAXQUIT") != this->CapKeys.end()) && (this->CapKeys.find("MAXQUIT")->second != ConvToStr(MAXQUIT)))))
1012                                 reason = "Maximum quit lengths differ or remote quit length not specified";
1013
1014                         if (((this->CapKeys.find("MAXTOPIC") == this->CapKeys.end()) || ((this->CapKeys.find("MAXTOPIC") != this->CapKeys.end()) && (this->CapKeys.find("MAXTOPIC")->second != ConvToStr(MAXTOPIC)))))
1015                                 reason = "Maximum topic lengths differ or remote topic length not specified";
1016
1017                         if (((this->CapKeys.find("MAXKICK") == this->CapKeys.end()) || ((this->CapKeys.find("MAXKICK") != this->CapKeys.end()) && (this->CapKeys.find("MAXKICK")->second != ConvToStr(MAXKICK)))))
1018                                 reason = "Maximum kick lengths differ or remote kick length not specified";
1019
1020                         if (((this->CapKeys.find("MAXGECOS") == this->CapKeys.end()) || ((this->CapKeys.find("MAXGECOS") != this->CapKeys.end()) && (this->CapKeys.find("MAXGECOS")->second != ConvToStr(MAXGECOS)))))
1021                                 reason = "Maximum GECOS (fullname) lengths differ or remote GECOS length not specified";
1022
1023                         if (((this->CapKeys.find("MAXAWAY") == this->CapKeys.end()) || ((this->CapKeys.find("MAXAWAY") != this->CapKeys.end()) && (this->CapKeys.find("MAXAWAY")->second != ConvToStr(MAXAWAY)))))
1024                                 reason = "Maximum awaymessage lengths differ or remote awaymessage length not specified";
1025
1026                         if (reason.length())
1027                         {
1028                                 this->WriteLine("ERROR :CAPAB negotiation failed: "+reason);
1029                                 return false;
1030                         }
1031                 }
1032                 else if ((params[0] == "MODULES") && (params.size() == 2))
1033                 {
1034                         if (!this->ModuleList.length())
1035                         {
1036                                 this->ModuleList.append(params[1]);
1037                         }
1038                         else
1039                         {
1040                                 this->ModuleList.append(",");
1041                                 this->ModuleList.append(params[1]);
1042                         }
1043                 }
1044                 else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
1045                 {
1046                         irc::tokenstream capabs(params[1]);
1047                         std::string item = "*";
1048                         while ((item = capabs.GetToken()) != "")
1049                         {
1050                                 /* Process each key/value pair */
1051                                 std::string::size_type equals = item.rfind('=');
1052                                 if (equals != std::string::npos)
1053                                 {
1054                                         std::string var = item.substr(0, equals);
1055                                         std::string value = item.substr(equals+1, item.length());
1056                                         this->Instance->Log(DEBUG,"Key='%s' Value='%s'",var.c_str(),value.c_str());
1057                                         CapKeys[var] = value;
1058                                 }
1059                         }
1060                 }
1061
1062                 return true;
1063         }
1064
1065         /** This function forces this server to quit, removing this server
1066          * and any users on it (and servers and users below that, etc etc).
1067          * It's very slow and pretty clunky, but luckily unless your network
1068          * is having a REAL bad hair day, this function shouldnt be called
1069          * too many times a month ;-)
1070          */
1071         void SquitServer(std::string &from, TreeServer* Current)
1072         {
1073                 /* recursively squit the servers attached to 'Current'.
1074                  * We're going backwards so we don't remove users
1075                  * while we still need them ;)
1076                  */
1077                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1078                 {
1079                         TreeServer* recursive_server = Current->GetChild(q);
1080                         this->SquitServer(from,recursive_server);
1081                 }
1082                 /* Now we've whacked the kids, whack self */
1083                 num_lost_servers++;
1084                 num_lost_users += Current->QuitUsers(from);
1085         }
1086
1087         /** This is a wrapper function for SquitServer above, which
1088          * does some validation first and passes on the SQUIT to all
1089          * other remaining servers.
1090          */
1091         void Squit(TreeServer* Current, const std::string &reason)
1092         {
1093                 if ((Current) && (Current != Utils->TreeRoot))
1094                 {
1095                         Event rmode((char*)Current->GetName().c_str(), (Module*)Utils->Creator, "lost_server");
1096                         rmode.Send(Instance);
1097
1098                         std::deque<std::string> params;
1099                         params.push_back(Current->GetName());
1100                         params.push_back(":"+reason);
1101                         Utils->DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
1102                         if (Current->GetParent() == Utils->TreeRoot)
1103                         {
1104                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
1105                         }
1106                         else
1107                         {
1108                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
1109                         }
1110                         num_lost_servers = 0;
1111                         num_lost_users = 0;
1112                         std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
1113                         SquitServer(from, Current);
1114                         Current->Tidy();
1115                         Current->GetParent()->DelChild(Current);
1116                         DELETE(Current);
1117                         this->Instance->WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
1118                 }
1119                 else
1120                 {
1121                         Instance->Log(DEFAULT,"Squit from unknown server");
1122                 }
1123         }
1124
1125         /** FMODE command - server mode with timestamp checks */
1126         bool ForceMode(const std::string &source, std::deque<std::string> &params)
1127         {
1128                 /* Chances are this is a 1.0 FMODE without TS */
1129                 if (params.size() < 3)
1130                 {
1131                         /* No modes were in the command, probably a channel with no modes set on it */
1132                         return true;
1133                 }
1134
1135                 bool smode = false;
1136                 std::string sourceserv;
1137
1138                 /* Are we dealing with an FMODE from a user, or from a server? */
1139                 userrec* who = this->Instance->FindNick(source);
1140                 if (who)
1141                 {
1142                         /* FMODE from a user, set sourceserv to the users server name */
1143                         sourceserv = who->server;
1144                 }
1145                 else
1146                 {
1147                         /* FMODE from a server, create a fake user to receive mode feedback */
1148                         who = new userrec(this->Instance);
1149                         who->SetFd(FD_MAGIC_NUMBER);
1150                         smode = true;           /* Setting this flag tells us we should free the userrec later */
1151                         sourceserv = source;    /* Set sourceserv to the actual source string */
1152                 }
1153                 const char* modelist[64];
1154                 time_t TS = 0;
1155                 int n = 0;
1156                 memset(&modelist,0,sizeof(modelist));
1157                 for (unsigned int q = 0; (q < params.size()) && (q < 64); q++)
1158                 {
1159                         if (q == 1)
1160                         {
1161                                 /* The timestamp is in this position.
1162                                  * We don't want to pass that up to the
1163                                  * server->client protocol!
1164                                  */
1165                                 TS = atoi(params[q].c_str());
1166                         }
1167                         else
1168                         {
1169                                 /* Everything else is fine to append to the modelist */
1170                                 modelist[n++] = params[q].c_str();
1171                         }
1172
1173                 }
1174                 /* Extract the TS value of the object, either userrec or chanrec */
1175                 userrec* dst = this->Instance->FindNick(params[0]);
1176                 chanrec* chan = NULL;
1177                 time_t ourTS = 0;
1178                 if (dst)
1179                 {
1180                         ourTS = dst->age;
1181                 }
1182                 else
1183                 {
1184                         chan = this->Instance->FindChan(params[0]);
1185                         if (chan)
1186                         {
1187                                 ourTS = chan->age;
1188                         }
1189                         else
1190                                 /* Oops, channel doesnt exist! */
1191                                 return true;
1192                 }
1193
1194                 /* TS is equal: Merge the mode changes, use voooodoooooo on modes
1195                  * with parameters.
1196                  */
1197                 if (TS == ourTS)
1198                 {
1199                         Instance->Log(DEBUG,"Entering TS equality check");
1200                         ModeHandler* mh = NULL;
1201                         unsigned long paramptr = 3;
1202                         std::string to_bounce = "";
1203                         std::string to_keep = "";
1204                         std::vector<std::string> params_to_keep;
1205                         std::string params_to_bounce = "";
1206                         bool adding = true;
1207                         char cur_change = 1;
1208                         char old_change = 0;
1209                         char old_bounce_change = 0;
1210                         /* Merge modes, basically do special stuff to mode with params */
1211                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1212                         {
1213                                 switch (*x)
1214                                 {
1215                                         case '-':
1216                                                 adding = false;
1217                                         break;
1218                                         case '+':
1219                                                 adding = true;
1220                                         break;
1221                                         default:
1222                                                 if (adding)
1223                                                 {
1224                                                         /* We only care about whats being set,
1225                                                          * not whats being unset
1226                                                          */
1227                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1228
1229                                                         if ((mh) && (mh->GetNumParams(adding) > 0) && (!mh->IsListMode()))
1230                                                         {
1231                                                                 /* We only want to do special things to
1232                                                                  * modes with parameters, we are going to rewrite
1233                                                                  * those parameters
1234                                                                  */
1235                                                                 ModePair ret;
1236                                                                 adding ? cur_change = '+' : cur_change = '-';
1237
1238                                                                 ret = mh->ModeSet(smode ? NULL : who, dst, chan, params[paramptr]);
1239
1240                                                                 /* The mode is set here, check which we should keep */
1241                                                                 if (ret.first)
1242                                                                 {
1243                                                                         bool which_to_keep = mh->CheckTimeStamp(TS, ourTS, params[paramptr], ret.second, chan);
1244
1245                                                                         if (which_to_keep == true)
1246                                                                         {
1247                                                                                 /* Keep ours, bounce theirs:
1248                                                                                  * Send back ours to them and
1249                                                                                  * drop their mode changs
1250                                                                                  */
1251                                                                                 adding ? cur_change = '+' : cur_change = '-';
1252                                                                                 if (cur_change != old_bounce_change)
1253                                                                                         to_bounce += cur_change;
1254                                                                                 to_bounce += *x;
1255                                                                                 old_bounce_change = cur_change;
1256
1257                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1258                                                                                         params_to_bounce.append(" ").append(ret.second);
1259                                                                         }
1260                                                                         else
1261                                                                         {
1262                                                                                 /* Keep theirs: Accept their mode change,
1263                                                                                  * do nothing else
1264                                                                                  */
1265                                                                                 adding ? cur_change = '+' : cur_change = '-';
1266                                                                                 if (cur_change != old_change)
1267                                                                                         to_keep += cur_change;
1268                                                                                 to_keep += *x;
1269                                                                                 old_change = cur_change;
1270
1271                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1272                                                                                         params_to_keep.push_back(params[paramptr]);
1273                                                                         }
1274                                                                 }
1275                                                                 else
1276                                                                 {
1277                                                                         /* Mode isnt set here, we want it */
1278                                                                         adding ? cur_change = '+' : cur_change = '-';
1279                                                                         if (cur_change != old_change)
1280                                                                                 to_keep += cur_change;
1281                                                                         to_keep += *x;
1282                                                                         old_change = cur_change;
1283
1284                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1285                                                                                 params_to_keep.push_back(params[paramptr]);
1286                                                                 }
1287
1288                                                                 paramptr++;
1289                                                         }
1290                                                         else
1291                                                         {
1292                                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1293
1294                                                                 if (mh)
1295                                                                 {
1296                                                                         adding ? cur_change = '+' : cur_change = '-';
1297
1298                                                                         /* Just keep this, safe to merge with no checks
1299                                                                          * it has no parameters
1300                                                                          */
1301
1302                                                                         if (cur_change != old_change)
1303                                                                                 to_keep += cur_change;
1304                                                                         to_keep += *x;
1305                                                                         old_change = cur_change;
1306
1307                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1308                                                                         {
1309                                                                                 Instance->Log(DEBUG,"Mode removal %d %d",adding, mh->GetNumParams(adding));
1310                                                                                 params_to_keep.push_back(params[paramptr++]);
1311                                                                         }
1312                                                                 }
1313                                                         }
1314                                                 }
1315                                                 else
1316                                                 {
1317                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1318
1319                                                         if (mh)
1320                                                         {
1321                                                                 /* Taking a mode away */
1322                                                                 adding ? cur_change = '+' : cur_change = '-';
1323
1324                                                                 if (cur_change != old_change)
1325                                                                         to_keep += cur_change;
1326                                                                 to_keep += *x;
1327                                                                 old_change = cur_change;
1328
1329                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1330                                                                         params_to_keep.push_back(params[paramptr++]);
1331                                                         }
1332                                                 }
1333                                         break;
1334                                 }
1335                         }
1336
1337                         if (to_bounce.length())
1338                         {
1339                                 std::deque<std::string> newparams;
1340                                 newparams.push_back(params[0]);
1341                                 newparams.push_back(ConvToStr(ourTS));
1342                                 newparams.push_back(to_bounce+params_to_bounce);
1343                                 Instance->Log(DEBUG,"BOUNCE BACK: %s",(to_bounce+params_to_bounce).c_str());
1344                                 Utils->DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1345                         }
1346
1347                         if (to_keep.length())
1348                         {
1349                                 unsigned int n = 2;
1350                                 unsigned int q = 0;
1351                                 modelist[0] = params[0].c_str();
1352                                 modelist[1] = to_keep.c_str();
1353
1354                                 if (params_to_keep.size() > 0)
1355                                 {
1356                                         for (q = 0; (q < params_to_keep.size()) && (q < 64); q++)
1357                                         {
1358                                                 Instance->Log(DEBUG,"KEEP Item %d of %d: %s", q, params_to_keep.size(), params_to_keep[q].c_str());
1359                                                 modelist[n++] = params_to_keep[q].c_str();
1360                                         }
1361                                 }
1362
1363                                 if (smode)
1364                                 {
1365                                         Instance->Log(DEBUG,"Send mode");
1366                                         this->Instance->SendMode(modelist, n, who);
1367                                 }
1368                                 else
1369                                 {
1370                                         Instance->Log(DEBUG,"Send mode client");
1371                                         this->Instance->CallCommandHandler("MODE", modelist, n, who);
1372                                 }
1373
1374                                 /* HOT POTATO! PASS IT ON! */
1375                                 Utils->DoOneToAllButSender(source,"FMODE",params,sourceserv);
1376                         }
1377                 }
1378                 else
1379                 /* U-lined servers always win regardless of their TS */
1380                 if ((TS > ourTS) && (!this->Instance->ULine(source.c_str())))
1381                 {
1382                         /* Bounce the mode back to its sender.* We use our lower TS, so the other end
1383                          * SHOULD accept it, if its clock is right.
1384                          *
1385                          * NOTE: We should check that we arent bouncing anything thats already set at this end.
1386                          * If we are, bounce +ourmode to 'reinforce' it. This prevents desyncs.
1387                          * e.g. They send +l 50, we have +l 10 set. rather than bounce -l 50, we bounce +l 10.
1388                          *
1389                          * Thanks to jilles for pointing out this one-hell-of-an-issue before i even finished
1390                          * writing the code. It took me a while to come up with this solution.
1391                          *
1392                          * XXX: BE SURE YOU UNDERSTAND THIS CODE FULLY BEFORE YOU MESS WITH IT.
1393                          */
1394
1395                         std::deque<std::string> newparams;      /* New parameter list we send back */
1396                         newparams.push_back(params[0]);         /* Target, user or channel */
1397                         newparams.push_back(ConvToStr(ourTS));  /* Timestamp value of the target */
1398                         newparams.push_back("");                /* This contains the mode string. For now
1399                                                                  * it's empty, we fill it below.
1400                                                                  */
1401
1402                         /* Intelligent mode bouncing. Don't just invert, reinforce any modes which are already
1403                          * set to avoid a desync here.
1404                          */
1405                         std::string modebounce = "";
1406                         bool adding = true;
1407                         unsigned int t = 3;
1408                         ModeHandler* mh = NULL;
1409                         char cur_change = 1;
1410                         char old_change = 0;
1411                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1412                         {
1413                                 /* Iterate over all mode chars in the sent set */
1414                                 switch (*x)
1415                                 {
1416                                         /* Adding or subtracting modes? */
1417                                         case '-':
1418                                                 adding = false;
1419                                         break;
1420                                         case '+':
1421                                                 adding = true;
1422                                         break;
1423                                         default:
1424                                                 /* Find the mode handler for this mode */
1425                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1426
1427                                                 /* Got a mode handler?
1428                                                  * This also prevents us bouncing modes we have no handler for.
1429                                                  */
1430                                                 if (mh)
1431                                                 {
1432                                                         ModePair ret;
1433                                                         std::string p = "";
1434
1435                                                         /* Does the mode require a parameter right now?
1436                                                          * If it does, fetch it if we can
1437                                                          */
1438                                                         if ((mh->GetNumParams(adding) > 0) && (t < params.size()))
1439                                                                 p = params[t++];
1440
1441                                                         /* Call the ModeSet method to determine if its set with the
1442                                                          * given parameter here or not.
1443                                                          */
1444                                                         ret = mh->ModeSet(smode ? NULL : who, dst, chan, p);
1445
1446                                                         /* XXX: Really. Dont ask.
1447                                                          * Determine from if its set combined with what the current
1448                                                          * 'state' is (adding or not) as to wether we should 'invert'
1449                                                          * or 'reinforce' the mode change
1450                                                          */
1451                                                         (!ret.first ? (adding ? cur_change = '-' : cur_change = '+') : (!adding ? cur_change = '-' : cur_change = '+'));
1452
1453                                                         /* Quickly determine if we have 'flipped' from + to -,
1454                                                          * or - to +, to prevent unneccessary +/- chars in the
1455                                                          * output string that waste bandwidth
1456                                                          */
1457                                                         if (cur_change != old_change)
1458                                                                 modebounce += cur_change;
1459                                                         old_change = cur_change;
1460
1461                                                         /* Add the mode character to the output string */
1462                                                         modebounce += mh->GetModeChar();
1463
1464                                                         /* We got a parameter back from ModeHandler::ModeSet,
1465                                                          * are we supposed to be sending one out right now?
1466                                                          */
1467                                                         if (ret.second.length())
1468                                                         {
1469                                                                 if (mh->GetNumParams(cur_change == '+') > 0)
1470                                                                         /* Yes we're supposed to be sending out
1471                                                                          * the parameter. Make sure it goes
1472                                                                          */
1473                                                                         newparams.push_back(ret.second);
1474                                                         }
1475
1476                                                 }
1477                                         break;
1478                                 }
1479                         }
1480
1481                         /* Update the parameters for FMODE with the new 'bounced' string */
1482                         newparams[2] = modebounce;
1483                         /* Only send it back the way it came, no need to send it anywhere else */
1484                         Utils->DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1485                         Instance->Log(DEBUG,"FMODE bounced intelligently, our TS less than theirs and the other server is NOT a uline.");
1486                 }
1487                 else
1488                 {
1489                         Instance->Log(DEBUG,"Allow modes, TS lower for sender");
1490                         /* The server was ulined, but something iffy is up with the TS.
1491                          * Sound the alarm bells!
1492                          */
1493                         if ((this->Instance->ULine(sourceserv.c_str())) && (TS > ourTS))
1494                         {
1495                                 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());
1496                         }
1497                         /* Allow the mode, route it to either server or user command handling */
1498                         if (smode)
1499                                 this->Instance->SendMode(modelist,n,who);
1500                         else
1501                                 this->Instance->CallCommandHandler("MODE", modelist, n, who);
1502
1503                         /* HOT POTATO! PASS IT ON! */
1504                         Utils->DoOneToAllButSender(source,"FMODE",params,sourceserv);
1505                 }
1506                 /* Are we supposed to free the userrec? */
1507                 if (smode)
1508                         DELETE(who);
1509
1510                 return true;
1511         }
1512
1513         /** FTOPIC command */
1514         bool ForceTopic(const std::string &source, std::deque<std::string> &params)
1515         {
1516                 if (params.size() != 4)
1517                         return true;
1518                 time_t ts = atoi(params[1].c_str());
1519                 std::string nsource = source;
1520
1521                 chanrec* c = this->Instance->FindChan(params[0]);
1522                 if (c)
1523                 {
1524                         if ((ts >= c->topicset) || (!*c->topic))
1525                         {
1526                                 std::string oldtopic = c->topic;
1527                                 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
1528                                 strlcpy(c->setby,params[2].c_str(),NICKMAX-1);
1529                                 c->topicset = ts;
1530                                 /* if the topic text is the same as the current topic,
1531                                  * dont bother to send the TOPIC command out, just silently
1532                                  * update the set time and set nick.
1533                                  */
1534                                 if (oldtopic != params[3])
1535                                 {
1536                                         userrec* user = this->Instance->FindNick(source);
1537                                         if (!user)
1538                                         {
1539                                                 c->WriteChannelWithServ(source.c_str(), "TOPIC %s :%s", c->name, c->topic);
1540                                         }
1541                                         else
1542                                         {
1543                                                 c->WriteChannel(user, "TOPIC %s :%s", c->name, c->topic);
1544                                                 nsource = user->server;
1545                                         }
1546                                         /* all done, send it on its way */
1547                                         params[3] = ":" + params[3];
1548                                         Utils->DoOneToAllButSender(source,"FTOPIC",params,nsource);
1549                                 }
1550                         }
1551
1552                 }
1553
1554                 return true;
1555         }
1556
1557         /** FJOIN, similar to TS6 SJOIN, but not quite. */
1558         bool ForceJoin(const std::string &source, std::deque<std::string> &params)
1559         {
1560                 /* 1.1 FJOIN works as follows:
1561                  *
1562                  * Each FJOIN is sent along with a timestamp, and the side with the lowest
1563                  * timestamp 'wins'. From this point on we will refer to this side as the
1564                  * winner. The side with the higher timestamp loses, from this point on we
1565                  * will call this side the loser or losing side. This should be familiar to
1566                  * anyone who's dealt with dreamforge or TS6 before.
1567                  *
1568                  * When two sides of a split heal and this occurs, the following things
1569                  * will happen:
1570                  *
1571                  * If the timestamps are exactly equal, both sides merge their privilages
1572                  * and users, as in InspIRCd 1.0 and ircd2.8. The channels have not been
1573                  * re-created during a split, this is safe to do.
1574                  *
1575                  *
1576                  * If the timestamps are NOT equal, the losing side removes all privilage
1577                  * modes from all of its users that currently exist in the channel, before
1578                  * introducing new users into the channel which are listed in the FJOIN
1579                  * command's parameters. This means, all modes +ohv, and privilages added
1580                  * by modules, such as +qa. The losing side then LOWERS its timestamp value
1581                  * of the channel to match that of the winning side, and the modes of the
1582                  * users of the winning side are merged in with the losing side. The loser
1583                  * then sends out a set of FMODE commands which 'confirm' that it just
1584                  * removed all privilage modes from its existing users, which allows for
1585                  * services packages to still work correctly without needing to know the
1586                  * timestamping rules which InspIRCd follows. In TS6 servers this is always
1587                  * a problem, and services packages must contain code which explicitly
1588                  * behaves as TS6 does, removing ops from the losing side of a split where
1589                  * neccessary within its internal records, as this state information is
1590                  * not explicitly echoed out in that protocol.
1591                  *
1592                  * The winning side on the other hand will ignore all user modes from the
1593                  * losing side, so only its own modes get applied. Life is simple for those
1594                  * who succeed at internets. :-)
1595                  *
1596                  * NOTE: Unlike TS6 and dreamforge and other protocols which have SJOIN,
1597                  * FJOIN does not contain the simple-modes such as +iklmnsp. Why not,
1598                  * you ask? Well, quite simply because we don't need to. They'll be sent
1599                  * after the FJOIN by FMODE, and FMODE is timestamped, so in the event
1600                  * the losing side sends any modes for the channel which shouldnt win,
1601                  * they wont as their timestamp will be too high :-)
1602                  */
1603
1604                 if (params.size() < 3)
1605                         return true;
1606
1607                 char first[MAXBUF];             /* The first parameter of the mode command */
1608                 char modestring[MAXBUF];        /* The mode sequence (2nd parameter) of the mode command */
1609                 char* mode_users[127];          /* The values used by the mode command */
1610                 memset(&mode_users,0,sizeof(mode_users));       /* Initialize mode parameters */
1611                 mode_users[0] = first;          /* Set this up to be our on-stack value */
1612                 mode_users[1] = modestring;     /* Same here as above */
1613                 strcpy(modestring,"+");         /* Initialize the mode sequence to just '+' */
1614                 unsigned int modectr = 2;       /* Pointer to the third mode parameter (e.g. the one after the +-sequence) */
1615
1616                 userrec* who = NULL;                    /* User we are currently checking */
1617                 std::string channel = params[0];        /* Channel name, as a string */
1618                 time_t TS = atoi(params[1].c_str());    /* Timestamp given to us for remote side */
1619                 bool created = false;
1620
1621                 /* Try and find the channel */
1622                 chanrec* chan = this->Instance->FindChan(channel);
1623
1624                 /* Initialize channel name in the mode parameters */
1625                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
1626
1627                 /* default TS is a high value, which if we dont have this
1628                  * channel will let the other side apply their modes.
1629                  */
1630                 time_t ourTS = Instance->Time(true)+600;
1631
1632                 /* Does this channel exist? if it does, get its REAL timestamp */
1633                 if (chan)
1634                         ourTS = chan->age;
1635                 else
1636                         created = true; /* don't perform deops, and set TS to correct time after processing. */
1637
1638                 /* In 1.1, if they have the newer channel, we immediately clear
1639                  * all status modes from our users. We then accept their modes.
1640                  * If WE have the newer channel its the other side's job to do this.
1641                  * Note that this causes the losing server to send out confirming
1642                  * FMODE lines.
1643                  */
1644                 if (ourTS > TS)
1645                 {
1646                         Instance->Log(DEBUG,"************ WE LOST TS COMPARE, DEOPPING EVERYONE ********************* ");
1647                         std::deque<std::string> param_list;
1648
1649                         /* Lower the TS here */
1650                         if (Utils->AnnounceTSChange && chan)
1651                                 chan->WriteChannelWithServ(Instance->Config->ServerName,
1652                                 "NOTICE %s :TS for %s changed from %lu to %lu", chan->name, chan->name, ourTS, TS);
1653                         ourTS = TS;
1654
1655                         /* Zap all the privilage modes on our side, if the channel exists here */
1656                         param_list.push_back(channel);
1657                         this->RemoveStatus(Instance->Config->ServerName, param_list);
1658                         chan->age = TS;
1659                 }
1660
1661                 /* Put the final parameter of the FJOIN into a tokenstream ready to split it */
1662                 irc::tokenstream users(params[2]);
1663                 std::string item = "*";
1664
1665                 /* do this first, so our mode reversals are correctly received by other servers
1666                  * if there is a TS collision.
1667                  */
1668                 params[2] = ":" + params[2];
1669                 Utils->DoOneToAllButSender(source,"FJOIN",params,source);
1670
1671                 /* Now, process every 'prefixes,nick' pair */
1672                 while (item != "")
1673                 {
1674                         /* Find next user */
1675                         item = users.GetToken();
1676
1677                         const char* usr = item.c_str();
1678
1679                         /* Safety check just to make sure someones not sent us an FJOIN full of spaces
1680                          * (is this even possible?) */
1681                         if (usr && *usr)
1682                         {
1683                                 const char* permissions = usr;
1684                                 int ntimes = 0;
1685                                 char* nm = new char[MAXBUF];
1686                                 char* tnm = nm;
1687
1688                                 /* Iterate through all the prefix values, convert them from prefixes
1689                                  * to mode letters, and append them to the mode sequence
1690                                  */
1691                                 while ((*permissions) && (*permissions != ',') && (ntimes < MAXBUF))
1692                                 {
1693                                         ModeHandler* mh = Instance->Modes->FindPrefix(*permissions);
1694                                         if (mh)
1695                                         {
1696                                                 /* This is a valid prefix */
1697                                                 ntimes++;
1698                                                 *tnm++ = mh->GetModeChar();
1699                                         }
1700                                         else
1701                                         {
1702                                                 /* Not a valid prefix...
1703                                                  * danger bill bobbertson! (that's will robinsons older brother ;-) ...)
1704                                                  */
1705                                                 this->Instance->WriteOpers("ERROR: We received a user with an unknown prefix '%c'. Closed connection to avoid a desync.",*permissions);
1706                                                 this->WriteLine(std::string("ERROR :Invalid prefix '")+(*permissions)+"' in FJOIN");
1707                                                 return false;
1708                                         }
1709                                         usr++;
1710                                         permissions++;
1711                                 }
1712
1713                                 /* Null terminate modes */
1714                                 *tnm = 0;
1715                                 /* Advance past the comma, to the nick */
1716                                 usr++;
1717
1718                                 /* Check the user actually exists */
1719                                 who = this->Instance->FindNick(usr);
1720                                 if (who)
1721                                 {
1722                                         /* Did they get any modes? How many times? */
1723                                         strlcat(modestring, nm, MAXBUF);
1724                                         for (int k = 0; k < ntimes; k++)
1725                                                 mode_users[modectr++] = strdup(usr);
1726
1727                                         /* Free temporary buffer used for mode sequence */
1728                                         delete[] nm;
1729
1730                                         /* Check that the user's 'direction' is correct
1731                                          * based on the server sending the FJOIN. We must
1732                                          * check each nickname in turn, because the origin of
1733                                          * the FJOIN may be different to the origin of the nicks
1734                                          * in the command itself.
1735                                          */
1736                                         TreeServer* route_back_again = Utils->BestRouteTo(who->server);
1737                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
1738                                         {
1739                                                 /* Oh dear oh dear. */
1740                                                 Instance->Log(DEBUG,"Fake direction in FJOIN, user '%s'",who->nick);
1741                                                 continue;
1742                                         }
1743                                         /* Finally, we can actually place the user into the channel.
1744                                          * We're sure its right. Final answer, phone a friend.
1745                                          */
1746                                         chanrec::JoinUser(this->Instance, who, channel.c_str(), true, "");
1747
1748                                         /* Have we already queued up MAXMODES modes with parameters
1749                                          * (+qaohv) ready to be sent to the server?
1750                                          */
1751                                         if (modectr >= (MAXMODES-1))
1752                                         {
1753                                                 /* Only actually give the users any status if we lost
1754                                                  * the FJOIN or drew (equal timestamps).
1755                                                  * It isn't actually possible for ourTS to be > TS here,
1756                                                  * only possible to actually have ourTS == TS, or
1757                                                  * ourTS < TS, because if we lost, we already lowered
1758                                                  * our TS above before we entered this loop. We only
1759                                                  * check >= as a safety measure, in case someone stuffed
1760                                                  * up. If someone DID stuff up, it was most likely me.
1761                                                  * Note: I do not like baseball bats in the face...
1762                                                  */
1763                                                 if (ourTS >= TS)
1764                                                 {
1765                                                         Instance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1766                                                         this->Instance->SendMode((const char**)mode_users,modectr,who);
1767
1768                                                         /* Something stuffed up, and for some reason, the timestamp is
1769                                                          * NOT lowered right now and should be. Lower it. Usually this
1770                                                          * code won't be executed, doubtless someone will remove it some
1771                                                          * day soon.
1772                                                          */
1773                                                         if (ourTS > TS)
1774                                                         {
1775                                                                 Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
1776                                                                 chan->age = TS;
1777                                                                 ourTS = TS;
1778                                                         }
1779                                                 }
1780
1781                                                 /* Reset all this back to defaults, and
1782                                                  * free any ram we have left allocated.
1783                                                  */
1784                                                 strcpy(mode_users[1],"+");
1785                                                 for (unsigned int f = 2; f < modectr; f++)
1786                                                         free(mode_users[f]);
1787                                                 modectr = 2;
1788                                         }
1789                                 }
1790                                 else
1791                                 {
1792                                         /* Remember to free this */
1793                                         delete[] nm;
1794                                         /* If we got here, there's a nick in FJOIN which doesnt exist on this server.
1795                                          * We don't try to process the nickname here (that WOULD cause a segfault because
1796                                          * we'd be playing with null pointers) however, we DO pass the nickname on, just
1797                                          * in case somehow we're desynched, so that other users which might be able to see
1798                                          * the nickname get their fair chance to process it.
1799                                          */
1800                                         Instance->Log(SPARSE,"Warning! Invalid user in FJOIN to channel %s IGNORED", channel.c_str());
1801                                         continue;
1802                                 }
1803                         }
1804                 }
1805
1806                 /* there werent enough modes built up to flush it during FJOIN,
1807                  * or, there are a number left over. flush them out.
1808                  */
1809                 if ((modectr > 2) && (who) && (chan))
1810                 {
1811                         if (ourTS >= TS)
1812                         {
1813                                 /* Our channel is newer than theirs. Evil deeds must be afoot. */
1814                                 this->Instance->SendMode((const char**)mode_users,modectr,who);
1815                                 /* Yet again, we can't actually get a true value here, if everything else
1816                                  * is working as it should.
1817                                  */
1818                                 if (ourTS > TS)
1819                                 {
1820                                         Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
1821                                         chan->age = TS;
1822                                         ourTS = TS;
1823                                 }
1824                         }
1825
1826                         /* Free anything we have left to free */
1827                         for (unsigned int f = 2; f < modectr; f++)
1828                                 free(mode_users[f]);
1829                 }
1830
1831                 /* if we newly created the channel, set it's TS properly. */
1832                 if (created)
1833                 {
1834                         /* find created channel .. */
1835                         chan = this->Instance->FindChan(channel);
1836                         if (chan)
1837                                 /* w00t said this shouldnt be needed but it is.
1838                                  * This isnt strictly true, as chan can be NULL
1839                                  * if a nick collision has occured and therefore
1840                                  * the channel was never created.
1841                                  */
1842                                 chan->age = TS;
1843                 }
1844
1845                 /* All done. That wasnt so bad was it, you can wipe
1846                  * the sweat from your forehead now. :-)
1847                  */
1848                 return true;
1849         }
1850
1851         /** NICK command */
1852         bool IntroduceClient(const std::string &source, std::deque<std::string> &params)
1853         {
1854                 if (params.size() < 8)
1855                         return true;
1856                 if (params.size() > 8)
1857                 {
1858                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
1859                         return true;
1860                 }
1861                 // NICK age nick host dhost ident +modes ip :gecos
1862                 //       0    1   2     3     4      5   6     7
1863                 time_t age = atoi(params[0].c_str());
1864
1865                 /* This used to have a pretty craq'y loop doing the same thing,
1866                  * now we just let the STL do the hard work (more efficiently)
1867                  */
1868                 std::string::size_type pos_after_plus = params[5].find_first_not_of('+');
1869                 if (pos_after_plus != std::string::npos)
1870                         params[5] = params[5].substr(pos_after_plus);
1871
1872                 const char* tempnick = params[1].c_str();
1873                 Instance->Log(DEBUG,"Introduce client %s!%s@%s",tempnick,params[4].c_str(),params[2].c_str());
1874
1875                 user_hash::iterator iter = this->Instance->clientlist->find(tempnick);
1876
1877                 if (iter != this->Instance->clientlist->end())
1878                 {
1879                         // nick collision
1880                         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);
1881                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+tempnick+" :Nickname collision");
1882                         userrec::QuitUser(this->Instance, iter->second, "Nickname collision");
1883                         return true;
1884                 }
1885
1886                 userrec* _new = new userrec(this->Instance);
1887                 (*(this->Instance->clientlist))[tempnick] = _new;
1888                 _new->SetFd(FD_MAGIC_NUMBER);
1889                 strlcpy(_new->nick, tempnick,NICKMAX-1);
1890                 strlcpy(_new->host, params[2].c_str(),63);
1891                 strlcpy(_new->dhost, params[3].c_str(),63);
1892                 _new->server = this->Instance->FindServerNamePtr(source.c_str());
1893                 strlcpy(_new->ident, params[4].c_str(),IDENTMAX);
1894                 strlcpy(_new->fullname, params[7].c_str(),MAXGECOS);
1895                 _new->registered = REG_ALL;
1896                 _new->signon = age;
1897
1898                 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
1899                         _new->modes[(*v)-65] = 1;
1900
1901 #ifdef SUPPORT_IP6LINKS
1902                 if (params[6].find_first_of(":") != std::string::npos)
1903                         _new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
1904                 else
1905 #endif
1906                         _new->SetSockAddr(AF_INET, params[6].c_str(), 0);
1907
1908                 Instance->AddGlobalClone(_new);
1909
1910                 this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString());
1911
1912                 params[7] = ":" + params[7];
1913                 Utils->DoOneToAllButSender(source,"NICK",params,source);
1914
1915                 // Increment the Source Servers User Count..
1916                 TreeServer* SourceServer = Utils->FindServer(source);
1917                 if (SourceServer)
1918                 {
1919                         Instance->Log(DEBUG,"Found source server of %s",_new->nick);
1920                         SourceServer->AddUserCount();
1921                 }
1922
1923                 FOREACH_MOD_I(Instance,I_OnPostConnect,OnPostConnect(_new));
1924
1925                 return true;
1926         }
1927
1928         /** Send one or more FJOINs for a channel of users.
1929          * If the length of a single line is more than 480-NICKMAX
1930          * in length, it is split over multiple lines.
1931          */
1932         void SendFJoins(TreeServer* Current, chanrec* c)
1933         {
1934                 std::string buffer;
1935
1936                 Instance->Log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1937                 char list[MAXBUF];
1938                 std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
1939
1940                 size_t dlen, curlen;
1941                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1942                 int numusers = 0;
1943                 char* ptr = list + dlen;
1944
1945                 CUList *ulist = c->GetUsers();
1946                 std::string modes = "";
1947                 std::string params = "";
1948
1949                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1950                 {
1951                         // The first parameter gets a : before it
1952                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick);
1953
1954                         curlen += ptrlen;
1955                         ptr += ptrlen;
1956
1957                         numusers++;
1958
1959                         if (curlen > (480-NICKMAX))
1960                         {
1961                                 buffer.append(list).append("\r\n");
1962
1963                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1964                                 ptr = list + dlen;
1965                                 ptrlen = 0;
1966                                 numusers = 0;
1967                         }
1968                 }
1969
1970                 if (numusers)
1971                         buffer.append(list).append("\r\n");
1972
1973                 /* Sorry for the hax. Because newly created channels assume +nt,
1974                  * if this channel doesnt have +nt, explicitly send -n and -t for the missing modes.
1975                  */
1976                 bool inverted = false;
1977                 if (!c->IsModeSet('n'))
1978                 {
1979                         modes.append("-n");
1980                         inverted = true;
1981                 }
1982                 if (!c->IsModeSet('t'))
1983                 {
1984                         modes.append("-t");
1985                         inverted = true;
1986                 }
1987                 if (inverted)
1988                 {
1989                         modes.append("+");
1990                 }
1991
1992                 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1993                 {
1994                         modes.append("b");
1995                         params.append(" ").append(b->data);
1996
1997                         if (params.length() >= MAXMODES)
1998                         {
1999                                 /* Wrap at MAXMODES */
2000                                 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");
2001                                 modes = "";
2002                                 params = "";
2003                         }
2004                 }
2005
2006                 buffer.append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(c->ChanModes(true));
2007
2008                 /* Only send these if there are any */
2009                 if (!modes.empty())
2010                         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);
2011
2012                 this->WriteLine(buffer);
2013         }
2014
2015         /** Send G, Q, Z and E lines */
2016         void SendXLines(TreeServer* Current)
2017         {
2018                 char data[MAXBUF];
2019                 std::string buffer;
2020                 std::string n = this->Instance->Config->ServerName;
2021                 const char* sn = n.c_str();
2022
2023                 /* Yes, these arent too nice looking, but they get the job done */
2024                 for (std::vector<ZLine*>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++)
2025                 {
2026                         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);
2027                         buffer.append(data);
2028                 }
2029                 for (std::vector<QLine*>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++)
2030                 {
2031                         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);
2032                         buffer.append(data);
2033                 }
2034                 for (std::vector<GLine*>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++)
2035                 {
2036                         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);
2037                         buffer.append(data);
2038                 }
2039                 for (std::vector<ELine*>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++)
2040                 {
2041                         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);
2042                         buffer.append(data);
2043                 }
2044                 for (std::vector<ZLine*>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++)
2045                 {
2046                         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);
2047                         buffer.append(data);
2048                 }
2049                 for (std::vector<QLine*>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++)
2050                 {
2051                         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);
2052                         buffer.append(data);
2053                 }
2054                 for (std::vector<GLine*>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++)
2055                 {
2056                         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);
2057                         buffer.append(data);
2058                 }
2059                 for (std::vector<ELine*>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++)
2060                 {
2061                         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);
2062                         buffer.append(data);
2063                 }
2064
2065                 if (!buffer.empty())
2066                         this->WriteLine(buffer);
2067         }
2068
2069         /** Send channel modes and topics */
2070         void SendChannelModes(TreeServer* Current)
2071         {
2072                 char data[MAXBUF];
2073                 std::deque<std::string> list;
2074                 std::string n = this->Instance->Config->ServerName;
2075                 const char* sn = n.c_str();
2076                 for (chan_hash::iterator c = this->Instance->chanlist->begin(); c != this->Instance->chanlist->end(); c++)
2077                 {
2078                         SendFJoins(Current, c->second);
2079                         if (*c->second->topic)
2080                         {
2081                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
2082                                 this->WriteLine(data);
2083                         }
2084                         FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)Utils->Creator,(void*)this));
2085                         list.clear();
2086                         c->second->GetExtList(list);
2087                         for (unsigned int j = 0; j < list.size(); j++)
2088                         {
2089                                 FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)Utils->Creator,(void*)this,list[j]));
2090                         }
2091                 }
2092         }
2093
2094         /** send all users and their oper state/modes */
2095         void SendUsers(TreeServer* Current)
2096         {
2097                 char data[MAXBUF];
2098                 std::deque<std::string> list;
2099                 std::string dataline;
2100                 for (user_hash::iterator u = this->Instance->clientlist->begin(); u != this->Instance->clientlist->end(); u++)
2101                 {
2102                         if (u->second->registered == REG_ALL)
2103                         {
2104                                 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);
2105                                 this->WriteLine(data);
2106                                 if (*u->second->oper)
2107                                 {
2108                                         snprintf(data,MAXBUF,":%s OPERTYPE %s", u->second->nick, u->second->oper);
2109                                         this->WriteLine(data);
2110                                 }
2111                                 if (*u->second->awaymsg)
2112                                 {
2113                                         snprintf(data,MAXBUF,":%s AWAY :%s", u->second->nick, u->second->awaymsg);
2114                                         this->WriteLine(data);
2115                                 }
2116                                 FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)Utils->Creator,(void*)this));
2117                                 list.clear();
2118                                 u->second->GetExtList(list);
2119                                 for (unsigned int j = 0; j < list.size(); j++)
2120                                 {
2121                                         FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)Utils->Creator,(void*)this,list[j]));
2122                                 }
2123                         }
2124                 }
2125         }
2126
2127         /** This function is called when we want to send a netburst to a local
2128          * server. There is a set order we must do this, because for example
2129          * users require their servers to exist, and channels require their
2130          * users to exist. You get the idea.
2131          */
2132         void DoBurst(TreeServer* s)
2133         {
2134                 std::string burst = "BURST "+ConvToStr(Instance->Time(true));
2135                 std::string endburst = "ENDBURST";
2136                 // Because by the end of the netburst, it  could be gone!
2137                 std::string name = s->GetName();
2138                 this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2"+name+"\2.");
2139                 this->WriteLine(burst);
2140                 /* send our version string */
2141                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
2142                 /* Send server tree */
2143                 this->SendServers(Utils->TreeRoot,s,1);
2144                 /* Send users and their oper status */
2145                 this->SendUsers(s);
2146                 /* Send everything else (channel modes, xlines etc) */
2147                 this->SendChannelModes(s);
2148                 this->SendXLines(s);
2149                 FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)Utils->Creator,(void*)this));
2150                 this->WriteLine(endburst);
2151                 this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
2152         }
2153
2154         /** This function is called when we receive data from a remote
2155          * server. We buffer the data in a std::string (it doesnt stay
2156          * there for long), reading using InspSocket::Read() which can
2157          * read up to 16 kilobytes in one operation.
2158          *
2159          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
2160          * THE SOCKET OBJECT FOR US.
2161          */
2162         virtual bool OnDataReady()
2163         {
2164                 char* data = this->Read();
2165                 /* Check that the data read is a valid pointer and it has some content */
2166                 if (data && *data)
2167                 {
2168                         this->in_buffer.append(data);
2169                         /* While there is at least one new line in the buffer,
2170                          * do something useful (we hope!) with it.
2171                          */
2172                         while (in_buffer.find("\n") != std::string::npos)
2173                         {
2174                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
2175                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
2176                                 /* Use rfind here not find, as theres more
2177                                  * chance of the \r being near the end of the
2178                                  * string, not the start.
2179                                  */
2180                                 if (ret.find("\r") != std::string::npos)
2181                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
2182                                 /* Process this one, abort if it
2183                                  * didnt return true.
2184                                  */
2185                                 if (!this->ProcessLine(ret))
2186                                 {
2187                                         return false;
2188                                 }
2189                         }
2190                         return true;
2191                 }
2192                 /* EAGAIN returns an empty but non-NULL string, so this
2193                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
2194                  */
2195                 return (data && !*data);
2196         }
2197
2198         int WriteLine(std::string line)
2199         {
2200                 Instance->Log(DEBUG,"OUT: %s",line.c_str());
2201                 line.append("\r\n");
2202                 return this->Write(line);
2203         }
2204
2205         /* Handle ERROR command */
2206         bool Error(std::deque<std::string> &params)
2207         {
2208                 if (params.size() < 1)
2209                         return false;
2210                 this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
2211                 /* we will return false to cause the socket to close. */
2212                 return false;
2213         }
2214
2215         /** remote MOTD. leet, huh? */
2216         bool Motd(const std::string &prefix, std::deque<std::string> &params)
2217         {
2218                 if (params.size() > 0)
2219                 {
2220                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2221                         {
2222                                 /* It's for our server */
2223                                 string_list results;
2224                                 userrec* source = this->Instance->FindNick(prefix);
2225
2226                                 if (source)
2227                                 {
2228                                         std::deque<std::string> par;
2229                                         par.push_back(prefix);
2230                                         par.push_back("");
2231
2232                                         if (!Instance->Config->MOTD.size())
2233                                         {
2234                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
2235                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2236                                                 return true;
2237                                         }
2238
2239                                         par[1] = std::string("::")+Instance->Config->ServerName+" 375 "+source->nick+" :"+Instance->Config->ServerName+" message of the day";
2240                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2241
2242                                         for (unsigned int i = 0; i < Instance->Config->MOTD.size(); i++)
2243                                         {
2244                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 372 "+source->nick+" :- "+Instance->Config->MOTD[i];
2245                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2246                                         }
2247
2248                                         par[1] = std::string("::")+Instance->Config->ServerName+" 376 "+source->nick+" End of message of the day.";
2249                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2250                                 }
2251                         }
2252                         else
2253                         {
2254                                 /* Pass it on */
2255                                 userrec* source = this->Instance->FindNick(prefix);
2256                                 if (source)
2257                                         Utils->DoOneToOne(prefix, "MOTD", params, params[0]);
2258                         }
2259                 }
2260                 return true;
2261         }
2262
2263         /** remote ADMIN. leet, huh? */
2264         bool Admin(const std::string &prefix, std::deque<std::string> &params)
2265         {
2266                 if (params.size() > 0)
2267                 {
2268                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2269                         {
2270                                 /* It's for our server */
2271                                 string_list results;
2272                                 userrec* source = this->Instance->FindNick(prefix);
2273
2274                                 if (source)
2275                                 {
2276                                         std::deque<std::string> par;
2277                                         par.push_back(prefix);
2278                                         par.push_back("");
2279
2280                                         par[1] = std::string("::")+Instance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+Instance->Config->ServerName;
2281                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2282
2283                                         par[1] = std::string("::")+Instance->Config->ServerName+" 257 "+source->nick+" :Name     - "+Instance->Config->AdminName;
2284                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2285
2286                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+Instance->Config->AdminNick;
2287                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2288
2289                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+Instance->Config->AdminEmail;
2290                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2291                                 }
2292                         }
2293                         else
2294                         {
2295                                 /* Pass it on */
2296                                 userrec* source = this->Instance->FindNick(prefix);
2297                                 if (source)
2298                                         Utils->DoOneToOne(prefix, "ADMIN", params, params[0]);
2299                         }
2300                 }
2301                 return true;
2302         }
2303
2304         bool Stats(const std::string &prefix, std::deque<std::string> &params)
2305         {
2306                 /* Get the reply to a STATS query if it matches this servername,
2307                  * and send it back as a load of PUSH queries
2308                  */
2309                 if (params.size() > 1)
2310                 {
2311                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
2312                         {
2313                                 /* It's for our server */
2314                                 string_list results;
2315                                 userrec* source = this->Instance->FindNick(prefix);
2316                                 if (source)
2317                                 {
2318                                         std::deque<std::string> par;
2319                                         par.push_back(prefix);
2320                                         par.push_back("");
2321                                         DoStats(this->Instance, *(params[0].c_str()), source, results);
2322                                         for (size_t i = 0; i < results.size(); i++)
2323                                         {
2324                                                 par[1] = "::" + results[i];
2325                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2326                                         }
2327                                 }
2328                         }
2329                         else
2330                         {
2331                                 /* Pass it on */
2332                                 userrec* source = this->Instance->FindNick(prefix);
2333                                 if (source)
2334                                         Utils->DoOneToOne(prefix, "STATS", params, params[1]);
2335                         }
2336                 }
2337                 return true;
2338         }
2339
2340
2341         /** Because the core won't let users or even SERVERS set +o,
2342          * we use the OPERTYPE command to do this.
2343          */
2344         bool OperType(const std::string &prefix, std::deque<std::string> &params)
2345         {
2346                 if (params.size() != 1)
2347                 {
2348                         Instance->Log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
2349                         return true;
2350                 }
2351                 std::string opertype = params[0];
2352                 userrec* u = this->Instance->FindNick(prefix);
2353                 if (u)
2354                 {
2355                         u->modes[UM_OPERATOR] = 1;
2356                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
2357                         Utils->DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
2358                         this->Instance->SNO->WriteToSnoMask('o',"From %s: User %s (%s@%s) is now an IRC operator of type %s",u->server, u->nick,u->ident,u->host,irc::Spacify(opertype.c_str()));
2359
2360                 }
2361                 return true;
2362         }
2363
2364         /** Because Andy insists that services-compatible servers must
2365          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
2366          */
2367         bool ForceNick(const std::string &prefix, std::deque<std::string> &params)
2368         {
2369                 if (params.size() < 3)
2370                         return true;
2371
2372                 userrec* u = this->Instance->FindNick(params[0]);
2373
2374                 if (u)
2375                 {
2376                         Utils->DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
2377                         if (IS_LOCAL(u))
2378                         {
2379                                 std::deque<std::string> par;
2380                                 par.push_back(params[1]);
2381                                 /* This is not required as one is sent in OnUserPostNick below
2382                                  */
2383                                 //Utils->DoOneToMany(u->nick,"NICK",par);
2384                                 if (!u->ForceNickChange(params[1].c_str()))
2385                                 {
2386                                         userrec::QuitUser(this->Instance, u, "Nickname collision");
2387                                         return true;
2388                                 }
2389                                 u->age = atoi(params[2].c_str());
2390                         }
2391                 }
2392                 return true;
2393         }
2394
2395         /*
2396          * Remote SQUIT (RSQUIT). Routing works similar to SVSNICK: Route it to the server that the target is connected to locally,
2397          * then let that server do the dirty work (squit it!). Example:
2398          * 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
2399          */
2400         bool RemoteSquit(const std::string &prefix, std::deque<std::string> &params)
2401         {
2402                 /* ok.. :w00t RSQUIT jupe.barafranca.com :reason here */
2403                 if (params.size() < 2)
2404                         return true;
2405
2406                 TreeServer* s = Utils->FindServerMask(params[0]);
2407
2408                 if (s)
2409                 {
2410                         if (s == Utils->TreeRoot)
2411                         {
2412                                 this->Instance->SNO->WriteToSnoMask('l',"What the fuck, I recieved a remote SQUIT for myself? :< (from %s", prefix.c_str());
2413                                 return true;
2414                         }
2415
2416                         TreeSocket* sock = s->GetSocket();
2417
2418                         if (sock)
2419                         {
2420                                 /* it's locally connected, KILL IT! */
2421                                 Instance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
2422                                 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());
2423                                 sock->Squit(s,"Server quit by " + prefix + ": " + params[1]);
2424                                 Instance->SE->DelFd(sock);
2425                                 sock->Close();
2426                                 delete sock;
2427                         }
2428                         else
2429                         {
2430                                 /* route the rsquit */
2431                                 params[1] = ":" + params[1];
2432                                 Utils->DoOneToOne(prefix, "RSQUIT", params, params[0]);
2433                         }
2434                 }
2435                 else
2436                 {
2437                         /* mother fucker! it doesn't exist */
2438                 }
2439
2440                 return true;
2441         }
2442
2443         bool ServiceJoin(const std::string &prefix, std::deque<std::string> &params)
2444         {
2445                 if (params.size() < 2)
2446                         return true;
2447
2448                 userrec* u = this->Instance->FindNick(params[0]);
2449
2450                 if (u)
2451                 {
2452                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false);
2453                         Utils->DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
2454                 }
2455                 return true;
2456         }
2457
2458         bool RemoteRehash(const std::string &prefix, std::deque<std::string> &params)
2459         {
2460                 if (params.size() < 1)
2461                         return false;
2462
2463                 std::string servermask = params[0];
2464
2465                 if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
2466                 {
2467                         this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated from server \002"+prefix+"\002.");
2468                         this->Instance->RehashServer();
2469                         Utils->ReadConfiguration(false);
2470                         InitializeDisabledCommands(Instance->Config->DisabledCommands, Instance);
2471                 }
2472                 Utils->DoOneToAllButSender(prefix,"REHASH",params,prefix);
2473                 return true;
2474         }
2475
2476         bool RemoteKill(const std::string &prefix, std::deque<std::string> &params)
2477         {
2478                 if (params.size() != 2)
2479                         return true;
2480
2481                 std::string nick = params[0];
2482                 userrec* u = this->Instance->FindNick(prefix);
2483                 userrec* who = this->Instance->FindNick(nick);
2484
2485                 if (who)
2486                 {
2487                         /* Prepend kill source, if we don't have one */
2488                         std::string sourceserv = prefix;
2489                         if (u)
2490                         {
2491                                 sourceserv = u->server;
2492                         }
2493                         if (*(params[1].c_str()) != '[')
2494                         {
2495                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
2496                         }
2497                         std::string reason = params[1];
2498                         params[1] = ":" + params[1];
2499                         Utils->DoOneToAllButSender(prefix,"KILL",params,sourceserv);
2500                         who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
2501                         userrec::QuitUser(this->Instance,who,reason);
2502                 }
2503                 return true;
2504         }
2505
2506         bool LocalPong(const std::string &prefix, std::deque<std::string> &params)
2507         {
2508                 if (params.size() < 1)
2509                         return true;
2510
2511                 if (params.size() == 1)
2512                 {
2513                         TreeServer* ServerSource = Utils->FindServer(prefix);
2514                         if (ServerSource)
2515                         {
2516                                 ServerSource->SetPingFlag();
2517                         }
2518                 }
2519                 else
2520                 {
2521                         std::string forwardto = params[1];
2522                         if (forwardto == this->Instance->Config->ServerName)
2523                         {
2524                                 /*
2525                                  * this is a PONG for us
2526                                  * if the prefix is a user, check theyre local, and if they are,
2527                                  * dump the PONG reply back to their fd. If its a server, do nowt.
2528                                  * Services might want to send these s->s, but we dont need to yet.
2529                                  */
2530                                 userrec* u = this->Instance->FindNick(prefix);
2531
2532                                 if (u)
2533                                 {
2534                                         u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
2535                                 }
2536                         }
2537                         else
2538                         {
2539                                 // not for us, pass it on :)
2540                                 Utils->DoOneToOne(prefix,"PONG",params,forwardto);
2541                         }
2542                 }
2543
2544                 return true;
2545         }
2546
2547         bool MetaData(const std::string &prefix, std::deque<std::string> &params)
2548         {
2549                 if (params.size() < 3)
2550                         return true;
2551
2552                 TreeServer* ServerSource = Utils->FindServer(prefix);
2553
2554                 if (ServerSource)
2555                 {
2556                         if (params[0] == "*")
2557                         {
2558                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
2559                         }
2560                         else if (*(params[0].c_str()) == '#')
2561                         {
2562                                 chanrec* c = this->Instance->FindChan(params[0]);
2563                                 if (c)
2564                                 {
2565                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
2566                                 }
2567                         }
2568                         else if (*(params[0].c_str()) != '#')
2569                         {
2570                                 userrec* u = this->Instance->FindNick(params[0]);
2571                                 if (u)
2572                                 {
2573                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
2574                                 }
2575                         }
2576                 }
2577
2578                 params[2] = ":" + params[2];
2579                 Utils->DoOneToAllButSender(prefix,"METADATA",params,prefix);
2580                 return true;
2581         }
2582
2583         bool ServerVersion(const std::string &prefix, std::deque<std::string> &params)
2584         {
2585                 if (params.size() < 1)
2586                         return true;
2587
2588                 TreeServer* ServerSource = Utils->FindServer(prefix);
2589
2590                 if (ServerSource)
2591                 {
2592                         ServerSource->SetVersion(params[0]);
2593                 }
2594                 params[0] = ":" + params[0];
2595                 Utils->DoOneToAllButSender(prefix,"VERSION",params,prefix);
2596                 return true;
2597         }
2598
2599         bool ChangeHost(const std::string &prefix, std::deque<std::string> &params)
2600         {
2601                 if (params.size() < 1)
2602                         return true;
2603
2604                 userrec* u = this->Instance->FindNick(prefix);
2605
2606                 if (u)
2607                 {
2608                         u->ChangeDisplayedHost(params[0].c_str());
2609                         Utils->DoOneToAllButSender(prefix,"FHOST",params,u->server);
2610                 }
2611                 return true;
2612         }
2613
2614         bool AddLine(const std::string &prefix, std::deque<std::string> &params)
2615         {
2616                 if (params.size() < 6)
2617                         return true;
2618
2619                 bool propogate = false;
2620
2621                 switch (*(params[0].c_str()))
2622                 {
2623                         case 'Z':
2624                                 propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2625                                 Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2626                         break;
2627                         case 'Q':
2628                                 propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2629                                 Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2630                         break;
2631                         case 'E':
2632                                 propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2633                                 Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2634                         break;
2635                         case 'G':
2636                                 propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2637                                 Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2638                         break;
2639                         case 'K':
2640                                 propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2641                         break;
2642                         default:
2643                                 /* Just in case... */
2644                                 this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
2645                                 propogate = false;
2646                         break;
2647                 }
2648
2649                 /* Send it on its way */
2650                 if (propogate)
2651                 {
2652                         if (atoi(params[4].c_str()))
2653                         {
2654                                 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());
2655                         }
2656                         else
2657                         {
2658                                 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());
2659                         }
2660                         params[5] = ":" + params[5];
2661                         Utils->DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
2662                 }
2663                 if (!this->bursting)
2664                 {
2665                         Instance->Log(DEBUG,"Applying lines...");
2666                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2667                 }
2668                 return true;
2669         }
2670
2671         bool ChangeName(const std::string &prefix, std::deque<std::string> &params)
2672         {
2673                 if (params.size() < 1)
2674                         return true;
2675
2676                 userrec* u = this->Instance->FindNick(prefix);
2677
2678                 if (u)
2679                 {
2680                         u->ChangeName(params[0].c_str());
2681                         params[0] = ":" + params[0];
2682                         Utils->DoOneToAllButSender(prefix,"FNAME",params,u->server);
2683                 }
2684                 return true;
2685         }
2686
2687         bool Whois(const std::string &prefix, std::deque<std::string> &params)
2688         {
2689                 if (params.size() < 1)
2690                         return true;
2691
2692                 Instance->Log(DEBUG,"In IDLE command");
2693                 userrec* u = this->Instance->FindNick(prefix);
2694
2695                 if (u)
2696                 {
2697                         Instance->Log(DEBUG,"USER EXISTS: %s",u->nick);
2698                         // an incoming request
2699                         if (params.size() == 1)
2700                         {
2701                                 userrec* x = this->Instance->FindNick(params[0]);
2702                                 if ((x) && (IS_LOCAL(x)))
2703                                 {
2704                                         userrec* x = this->Instance->FindNick(params[0]);
2705                                         char signon[MAXBUF];
2706                                         char idle[MAXBUF];
2707
2708                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
2709                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-Instance->Time(true)));
2710                                         std::deque<std::string> par;
2711                                         par.push_back(prefix);
2712                                         par.push_back(signon);
2713                                         par.push_back(idle);
2714                                         // ours, we're done, pass it BACK
2715                                         Utils->DoOneToOne(params[0],"IDLE",par,u->server);
2716                                 }
2717                                 else
2718                                 {
2719                                         // not ours pass it on
2720                                         Utils->DoOneToOne(prefix,"IDLE",params,x->server);
2721                                 }
2722                         }
2723                         else if (params.size() == 3)
2724                         {
2725                                 std::string who_did_the_whois = params[0];
2726                                 userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
2727                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2728                                 {
2729                                         // an incoming reply to a whois we sent out
2730                                         std::string nick_whoised = prefix;
2731                                         unsigned long signon = atoi(params[1].c_str());
2732                                         unsigned long idle = atoi(params[2].c_str());
2733                                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2734                                                 do_whois(this->Instance,who_to_send_to,u,signon,idle,nick_whoised.c_str());
2735                                 }
2736                                 else
2737                                 {
2738                                         // not ours, pass it on
2739                                         Utils->DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
2740                                 }
2741                         }
2742                 }
2743                 return true;
2744         }
2745
2746         bool Push(const std::string &prefix, std::deque<std::string> &params)
2747         {
2748                 if (params.size() < 2)
2749                         return true;
2750
2751                 userrec* u = this->Instance->FindNick(params[0]);
2752
2753                 if (!u)
2754                         return true;
2755
2756                 if (IS_LOCAL(u))
2757                 {
2758                         u->Write(params[1]);
2759                 }
2760                 else
2761                 {
2762                         // continue the raw onwards
2763                         params[1] = ":" + params[1];
2764                         Utils->DoOneToOne(prefix,"PUSH",params,u->server);
2765                 }
2766                 return true;
2767         }
2768
2769         bool HandleSetTime(const std::string &prefix, std::deque<std::string> &params)
2770         {
2771                 if (!params.size() || !Utils->EnableTimeSync)
2772                         return true;
2773
2774                 bool force = false;
2775
2776                 if ((params.size() == 2) && (params[1] == "FORCE"))
2777                         force = true;
2778
2779                 time_t rts = atoi(params[0].c_str());
2780                 time_t us = Instance->Time(true);
2781
2782                 if (rts == us)
2783                 {
2784                         Instance->Log(DEBUG, "Timestamp from %s is equal", prefix.c_str());
2785
2786                         Utils->DoOneToAllButSender(prefix, "TIMESET", params, prefix);
2787                 }
2788                 else if (force || (rts < us))
2789                 {
2790                         int old = Instance->SetTimeDelta(rts - us);
2791                         Instance->Log(DEBUG, "%s TS (diff %d) from %s applied (old delta was %d)", (force) ? "Forced" : "Lower", rts - us, prefix.c_str(), old);
2792
2793                         Utils->DoOneToAllButSender(prefix, "TIMESET", params, prefix);
2794                 }
2795                 else
2796                 {
2797                         Instance->Log(DEBUG, "Higher TS (diff %d) from %s overridden", us - rts, prefix.c_str());
2798
2799                         std::deque<std::string> oparams;
2800                         oparams.push_back(ConvToStr(us));
2801
2802                         Utils->DoOneToMany(prefix, "TIMESET", oparams);
2803                 }
2804
2805                 return true;
2806         }
2807
2808         bool Time(const std::string &prefix, std::deque<std::string> &params)
2809         {
2810                 // :source.server TIME remote.server sendernick
2811                 // :remote.server TIME source.server sendernick TS
2812                 if (params.size() == 2)
2813                 {
2814                         // someone querying our time?
2815                         if (this->Instance->Config->ServerName == params[0])
2816                         {
2817                                 userrec* u = this->Instance->FindNick(params[1]);
2818                                 if (u)
2819                                 {
2820                                         params.push_back(ConvToStr(Instance->Time(false)));
2821                                         params[0] = prefix;
2822                                         Utils->DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
2823                                 }
2824                         }
2825                         else
2826                         {
2827                                 // not us, pass it on
2828                                 userrec* u = this->Instance->FindNick(params[1]);
2829                                 if (u)
2830                                         Utils->DoOneToOne(prefix,"TIME",params,params[0]);
2831                         }
2832                 }
2833                 else if (params.size() == 3)
2834                 {
2835                         // a response to a previous TIME
2836                         userrec* u = this->Instance->FindNick(params[1]);
2837                         if ((u) && (IS_LOCAL(u)))
2838                         {
2839                         time_t rawtime = atol(params[2].c_str());
2840                         struct tm * timeinfo;
2841                         timeinfo = localtime(&rawtime);
2842                                 char tms[26];
2843                                 snprintf(tms,26,"%s",asctime(timeinfo));
2844                                 tms[24] = 0;
2845                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
2846                         }
2847                         else
2848                         {
2849                                 if (u)
2850                                         Utils->DoOneToOne(prefix,"TIME",params,u->server);
2851                         }
2852                 }
2853                 return true;
2854         }
2855
2856         bool LocalPing(const std::string &prefix, std::deque<std::string> &params)
2857         {
2858                 if (params.size() < 1)
2859                         return true;
2860
2861                 if (params.size() == 1)
2862                 {
2863                         std::string stufftobounce = params[0];
2864                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
2865                         return true;
2866                 }
2867                 else
2868                 {
2869                         std::string forwardto = params[1];
2870                         if (forwardto == this->Instance->Config->ServerName)
2871                         {
2872                                 // this is a ping for us, send back PONG to the requesting server
2873                                 params[1] = params[0];
2874                                 params[0] = forwardto;
2875                                 Utils->DoOneToOne(forwardto,"PONG",params,params[1]);
2876                         }
2877                         else
2878                         {
2879                                 // not for us, pass it on :)
2880                                 Utils->DoOneToOne(prefix,"PING",params,forwardto);
2881                         }
2882                         return true;
2883                 }
2884         }
2885
2886         bool RemoveStatus(const std::string &prefix, std::deque<std::string> &params)
2887         {
2888                 if (params.size() < 1)
2889                         return true;
2890
2891                 chanrec* c = Instance->FindChan(params[0]);
2892
2893                 if (c)
2894                 {
2895                         irc::modestacker modestack(false);
2896                         CUList *ulist = c->GetUsers();
2897                         const char* y[127];
2898                         std::deque<std::string> stackresult;
2899                         std::string x;
2900
2901                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
2902                         {
2903                                 std::string modesequence = Instance->Modes->ModeString(i->second, c);
2904                                 if (modesequence.length())
2905                                 {
2906                                         Instance->Log(DEBUG,"Mode sequence = '%s'",modesequence.c_str());
2907                                         irc::spacesepstream sep(modesequence);
2908                                         std::string modeletters = sep.GetToken();
2909                                         Instance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2910
2911                                         while (!modeletters.empty())
2912                                         {
2913                                                 char mletter = *(modeletters.begin());
2914                                                 modestack.Push(mletter,sep.GetToken());
2915                                                 Instance->Log(DEBUG,"Push letter = '%c'",mletter);
2916                                                 modeletters.erase(modeletters.begin());
2917                                                 Instance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2918                                         }
2919                                 }
2920                         }
2921
2922                         while (modestack.GetStackedLine(stackresult))
2923                         {
2924                                 Instance->Log(DEBUG,"Stacked line size %d",stackresult.size());
2925                                 stackresult.push_front(ConvToStr(c->age));
2926                                 stackresult.push_front(c->name);
2927                                 // dont echo this out, at best its just going to be bounced back -- Brain
2928                                 //Utils->DoOneToMany(Instance->Config->ServerName, "FMODE", stackresult);
2929                                 stackresult.erase(stackresult.begin() + 1);
2930                                 Instance->Log(DEBUG,"Stacked items:");
2931                                 for (size_t z = 0; z < stackresult.size(); z++)
2932                                 {
2933                                         y[z] = stackresult[z].c_str();
2934                                         Instance->Log(DEBUG,"\tstackresult[%d]='%s'",z,stackresult[z].c_str());
2935                                 }
2936                                 userrec* n = new userrec(Instance);
2937                                 n->SetFd(FD_MAGIC_NUMBER);
2938                                 Instance->SendMode(y, stackresult.size(), n);
2939                                 delete n;
2940                         }
2941                 }
2942                 return true;
2943         }
2944
2945         bool RemoteServer(const std::string &prefix, std::deque<std::string> &params)
2946         {
2947                 if (params.size() < 4)
2948                         return false;
2949
2950                 std::string servername = params[0];
2951                 std::string password = params[1];
2952                 // hopcount is not used for a remote server, we calculate this ourselves
2953                 std::string description = params[3];
2954                 TreeServer* ParentOfThis = Utils->FindServer(prefix);
2955
2956                 if (!ParentOfThis)
2957                 {
2958                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2959                         return false;
2960                 }
2961                 TreeServer* CheckDupe = Utils->FindServer(servername);
2962                 if (CheckDupe)
2963                 {
2964                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2965                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+servername+"\2 denied, already exists");
2966                         return false;
2967                 }
2968                 TreeServer* Node = new TreeServer(this->Utils,this->Instance,servername,description,ParentOfThis,NULL);
2969                 ParentOfThis->AddChild(Node);
2970                 params[3] = ":" + params[3];
2971                 Utils->DoOneToAllButSender(prefix,"SERVER",params,prefix);
2972                 this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2973                 return true;
2974         }
2975
2976         bool Outbound_Reply_Server(std::deque<std::string> &params)
2977         {
2978                 if (params.size() < 4)
2979                         return false;
2980
2981                 irc::string servername = params[0].c_str();
2982                 std::string sname = params[0];
2983                 std::string password = params[1];
2984                 int hops = atoi(params[2].c_str());
2985
2986                 if (hops)
2987                 {
2988                         this->WriteLine("ERROR :Server too far away for authentication");
2989                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2990                         return false;
2991                 }
2992                 std::string description = params[3];
2993                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
2994                 {
2995                         if ((x->Name == servername) && (x->RecvPass == password))
2996                         {
2997                                 TreeServer* CheckDupe = Utils->FindServer(sname);
2998                                 if (CheckDupe)
2999                                 {
3000                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
3001                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
3002                                         return false;
3003                                 }
3004                                 // Begin the sync here. this kickstarts the
3005                                 // other side, waiting in WAIT_AUTH_2 state,
3006                                 // into starting their burst, as it shows
3007                                 // that we're happy.
3008                                 this->LinkState = CONNECTED;
3009                                 // we should add the details of this server now
3010                                 // to the servers tree, as a child of the root
3011                                 // node.
3012                                 TreeServer* Node = new TreeServer(this->Utils,this->Instance,sname,description,Utils->TreeRoot,this);
3013                                 Utils->TreeRoot->AddChild(Node);
3014                                 params[3] = ":" + params[3];
3015                                 Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,sname);
3016                                 this->bursting = true;
3017                                 this->DoBurst(Node);
3018                                 return true;
3019                         }
3020                 }
3021                 this->WriteLine("ERROR :Invalid credentials");
3022                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
3023                 return false;
3024         }
3025
3026         bool Inbound_Server(std::deque<std::string> &params)
3027         {
3028                 if (params.size() < 4)
3029                         return false;
3030
3031                 irc::string servername = params[0].c_str();
3032                 std::string sname = params[0];
3033                 std::string password = params[1];
3034                 int hops = atoi(params[2].c_str());
3035
3036                 if (hops)
3037                 {
3038                         this->WriteLine("ERROR :Server too far away for authentication");
3039                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
3040                         return false;
3041                 }
3042                 std::string description = params[3];
3043                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
3044                 {
3045                         if ((x->Name == servername) && (x->RecvPass == password))
3046                         {
3047                                 TreeServer* CheckDupe = Utils->FindServer(sname);
3048                                 if (CheckDupe)
3049                                 {
3050                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
3051                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
3052                                         return false;
3053                                 }
3054                                 this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
3055
3056                                 if (this->Hook)
3057                                 {
3058                                         std::string name = InspSocketNameRequest((Module*)Utils->Creator, this->Hook).Send();
3059                                         this->Instance->SNO->WriteToSnoMask('l',"Connection from \2"+sname+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] using transport \2"+name+"\2");
3060                                 }
3061
3062                                 this->InboundServerName = sname;
3063                                 this->InboundDescription = description;
3064                                 // this is good. Send our details: Our server name and description and hopcount of 0,
3065                                 // along with the sendpass from this block.
3066                                 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
3067                                 // move to the next state, we are now waiting for THEM.
3068                                 this->LinkState = WAIT_AUTH_2;
3069                                 return true;
3070                         }
3071                 }
3072                 this->WriteLine("ERROR :Invalid credentials");
3073                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
3074                 return false;
3075         }
3076
3077         void Split(const std::string &line, std::deque<std::string> &n)
3078         {
3079                 n.clear();
3080                 irc::tokenstream tokens(line);
3081                 std::string param;
3082                 while ((param = tokens.GetToken()) != "")
3083                         n.push_back(param);
3084                 return;
3085         }
3086
3087         bool ProcessLine(std::string &line)
3088         {
3089                 std::deque<std::string> params;
3090                 irc::string command;
3091                 std::string prefix;
3092
3093                 line = line.substr(0, line.find_first_of("\r\n"));
3094
3095                 if (line.empty())
3096                         return true;
3097
3098                 Instance->Log(DEBUG,"IN: %s", line.c_str());
3099
3100                 this->Split(line.c_str(),params);
3101
3102                 if ((params[0][0] == ':') && (params.size() > 1))
3103                 {
3104                         prefix = params[0].substr(1);
3105                         params.pop_front();
3106                 }
3107
3108                 command = params[0].c_str();
3109                 params.pop_front();
3110
3111                 switch (this->LinkState)
3112                 {
3113                         TreeServer* Node;
3114
3115                         case WAIT_AUTH_1:
3116                                 // Waiting for SERVER command from remote server. Server initiating
3117                                 // the connection sends the first SERVER command, listening server
3118                                 // replies with theirs if its happy, then if the initiator is happy,
3119                                 // it starts to send its net sync, which starts the merge, otherwise
3120                                 // it sends an ERROR.
3121                                 if (command == "PASS")
3122                                 {
3123                                         /* Silently ignored */
3124                                 }
3125                                 else if (command == "SERVER")
3126                                 {
3127                                         return this->Inbound_Server(params);
3128                                 }
3129                                 else if (command == "ERROR")
3130                                 {
3131                                         return this->Error(params);
3132                                 }
3133                                 else if (command == "USER")
3134                                 {
3135                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
3136                                         return false;
3137                                 }
3138                                 else if (command == "CAPAB")
3139                                 {
3140                                         return this->Capab(params);
3141                                 }
3142                                 else if ((command == "U") || (command == "S"))
3143                                 {
3144                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3145                                         return false;
3146                                 }
3147                                 else
3148                                 {
3149                                         std::string error("ERROR :Invalid command in negotiation phase: ");
3150                                         error.append(command.c_str());
3151                                         this->WriteLine(error);
3152                                         return false;
3153                                 }
3154                         break;
3155                         case WAIT_AUTH_2:
3156                                 // Waiting for start of other side's netmerge to say they liked our
3157                                 // password.
3158                                 if (command == "SERVER")
3159                                 {
3160                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
3161                                         // silently ignore.
3162                                         return true;
3163                                 }
3164                                 else if ((command == "U") || (command == "S"))
3165                                 {
3166                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3167                                         return false;
3168                                 }
3169                                 else if (command == "BURST")
3170                                 {
3171                                         if (params.size() && Utils->EnableTimeSync)
3172                                         {
3173                                                 /* If a time stamp is provided, apply synchronization */
3174                                                 bool force = false;
3175                                                 time_t them = atoi(params[0].c_str());
3176                                                 time_t us = Instance->Time(true);
3177                                                 int delta = them - us;
3178
3179                                                 if ((params.size() == 2) && (params[1] == "FORCE"))
3180                                                         force = true;
3181
3182                                                 if ((delta < -600) || (delta > 600))
3183                                                 {
3184                                                         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));
3185                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
3186                                                         return false;
3187                                                 }
3188
3189                                                 if (us == them)
3190                                                 {
3191                                                         this->Instance->Log(DEBUG, "Timestamps are equal; pat yourself on the back");
3192                                                 }
3193                                                 else if (force || (us > them))
3194                                                 {
3195                                                         this->Instance->Log(DEBUG, "Remote server has lower TS (%d seconds)", them - us);
3196                                                         this->Instance->SetTimeDelta(them - us);
3197                                                         // Send this new timestamp to any other servers
3198                                                         Utils->DoOneToMany(Utils->TreeRoot->GetName(), "TIMESET", params);
3199                                                 }
3200                                                 else
3201                                                 {
3202                                                         // Override the timestamp
3203                                                         this->Instance->Log(DEBUG, "We have a higher timestamp (by %d seconds), not updating delta", us - them);
3204                                                         this->WriteLine(":" + Utils->TreeRoot->GetName() + " TIMESET " + ConvToStr(us));
3205                                                 }
3206                                         }
3207                                         this->LinkState = CONNECTED;
3208                                         Node = new TreeServer(this->Utils,this->Instance,InboundServerName,InboundDescription,Utils->TreeRoot,this);
3209                                         Utils->TreeRoot->AddChild(Node);
3210                                         params.clear();
3211                                         params.push_back(InboundServerName);
3212                                         params.push_back("*");
3213                                         params.push_back("1");
3214                                         params.push_back(":"+InboundDescription);
3215                                         Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,InboundServerName);
3216                                         this->bursting = true;
3217                                         this->DoBurst(Node);
3218                                 }
3219                                 else if (command == "ERROR")
3220                                 {
3221                                         return this->Error(params);
3222                                 }
3223                                 else if (command == "CAPAB")
3224                                 {
3225                                         return this->Capab(params);
3226                                 }
3227
3228                         break;
3229                         case LISTENER:
3230                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
3231                                 return false;
3232                         break;
3233                         case CONNECTING:
3234                                 if (command == "SERVER")
3235                                 {
3236                                         // another server we connected to, which was in WAIT_AUTH_1 state,
3237                                         // has just sent us their credentials. If we get this far, theyre
3238                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
3239                                         // if we're happy with this, we should send our netburst which
3240                                         // kickstarts the merge.
3241                                         return this->Outbound_Reply_Server(params);
3242                                 }
3243                                 else if (command == "ERROR")
3244                                 {
3245                                         return this->Error(params);
3246                                 }
3247                         break;
3248                         case CONNECTED:
3249                                 // This is the 'authenticated' state, when all passwords
3250                                 // have been exchanged and anything past this point is taken
3251                                 // as gospel.
3252
3253                                 if (prefix != "")
3254                                 {
3255                                         std::string direction = prefix;
3256                                         userrec* t = this->Instance->FindNick(prefix);
3257                                         if (t)
3258                                         {
3259                                                 direction = t->server;
3260                                         }
3261                                         TreeServer* route_back_again = Utils->BestRouteTo(direction);
3262                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
3263                                         {
3264                                                 if (route_back_again)
3265                                                         Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
3266                                                 return true;
3267                                         }
3268
3269                                         /* Fix by brain:
3270                                          * When there is activity on the socket, reset the ping counter so
3271                                          * that we're not wasting bandwidth pinging an active server.
3272                                          */
3273                                         route_back_again->SetNextPingTime(time(NULL) + 60);
3274                                         route_back_again->SetPingFlag();
3275                                 }
3276
3277                                 if (command == "SVSMODE")
3278                                 {
3279                                         /* Services expects us to implement
3280                                          * SVSMODE. In inspircd its the same as
3281                                          * MODE anyway.
3282                                          */
3283                                         command = "MODE";
3284                                 }
3285                                 std::string target = "";
3286                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
3287                                  * working with std::string here.
3288                                  */
3289                                 if ((command == "NICK") && (params.size() > 1))
3290                                 {
3291                                         return this->IntroduceClient(prefix,params);
3292                                 }
3293                                 else if (command == "FJOIN")
3294                                 {
3295                                         return this->ForceJoin(prefix,params);
3296                                 }
3297                                 else if (command == "STATS")
3298                                 {
3299                                         return this->Stats(prefix, params);
3300                                 }
3301                                 else if (command == "MOTD")
3302                                 {
3303                                         return this->Motd(prefix, params);
3304                                 }
3305                                 else if (command == "ADMIN")
3306                                 {
3307                                         return this->Admin(prefix, params);
3308                                 }
3309                                 else if (command == "SERVER")
3310                                 {
3311                                         return this->RemoteServer(prefix,params);
3312                                 }
3313                                 else if (command == "ERROR")
3314                                 {
3315                                         return this->Error(params);
3316                                 }
3317                                 else if (command == "OPERTYPE")
3318                                 {
3319                                         return this->OperType(prefix,params);
3320                                 }
3321                                 else if (command == "FMODE")
3322                                 {
3323                                         return this->ForceMode(prefix,params);
3324                                 }
3325                                 else if (command == "KILL")
3326                                 {
3327                                         return this->RemoteKill(prefix,params);
3328                                 }
3329                                 else if (command == "FTOPIC")
3330                                 {
3331                                         return this->ForceTopic(prefix,params);
3332                                 }
3333                                 else if (command == "REHASH")
3334                                 {
3335                                         return this->RemoteRehash(prefix,params);
3336                                 }
3337                                 else if (command == "METADATA")
3338                                 {
3339                                         return this->MetaData(prefix,params);
3340                                 }
3341                                 else if (command == "REMSTATUS")
3342                                 {
3343                                         return this->RemoveStatus(prefix,params);
3344                                 }
3345                                 else if (command == "PING")
3346                                 {
3347                                         /*
3348                                          * We just got a ping from a server that's bursting.
3349                                          * This can't be right, so set them to not bursting, and
3350                                          * apply their lines.
3351                                          */
3352                                         if (this->bursting)
3353                                         {
3354                                                 this->bursting = false;
3355                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3356                                         }
3357                                         if (prefix == "")
3358                                         {
3359                                                 prefix = this->GetName();
3360                                         }
3361                                         return this->LocalPing(prefix,params);
3362                                 }
3363                                 else if (command == "PONG")
3364                                 {
3365                                         /*
3366                                          * We just got a pong from a server that's bursting.
3367                                          * This can't be right, so set them to not bursting, and
3368                                          * apply their lines.
3369                                          */
3370                                         if (this->bursting)
3371                                         {
3372                                                 this->bursting = false;
3373                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3374                                         }
3375                                         if (prefix == "")
3376                                         {
3377                                                 prefix = this->GetName();
3378                                         }
3379                                         return this->LocalPong(prefix,params);
3380                                 }
3381                                 else if (command == "VERSION")
3382                                 {
3383                                         return this->ServerVersion(prefix,params);
3384                                 }
3385                                 else if (command == "FHOST")
3386                                 {
3387                                         return this->ChangeHost(prefix,params);
3388                                 }
3389                                 else if (command == "FNAME")
3390                                 {
3391                                         return this->ChangeName(prefix,params);
3392                                 }
3393                                 else if (command == "ADDLINE")
3394                                 {
3395                                         return this->AddLine(prefix,params);
3396                                 }
3397                                 else if (command == "SVSNICK")
3398                                 {
3399                                         if (prefix == "")
3400                                         {
3401                                                 prefix = this->GetName();
3402                                         }
3403                                         return this->ForceNick(prefix,params);
3404                                 }
3405                                 else if (command == "RSQUIT")
3406                                 {
3407                                         return this->RemoteSquit(prefix, params);
3408                                 }
3409                                 else if (command == "IDLE")
3410                                 {
3411                                         return this->Whois(prefix,params);
3412                                 }
3413                                 else if (command == "PUSH")
3414                                 {
3415                                         return this->Push(prefix,params);
3416                                 }
3417                                 else if (command == "TIMESET")
3418                                 {
3419                                         return this->HandleSetTime(prefix, params);
3420                                 }
3421                                 else if (command == "TIME")
3422                                 {
3423                                         return this->Time(prefix,params);
3424                                 }
3425                                 else if ((command == "KICK") && (Utils->IsServer(prefix)))
3426                                 {
3427                                         std::string sourceserv = this->myhost;
3428                                         if (params.size() == 3)
3429                                         {
3430                                                 userrec* user = this->Instance->FindNick(params[1]);
3431                                                 chanrec* chan = this->Instance->FindChan(params[0]);
3432                                                 if (user && chan)
3433                                                 {
3434                                                         if (!chan->ServerKickUser(user, params[2].c_str(), false))
3435                                                                 /* Yikes, the channels gone! */
3436                                                                 delete chan;
3437                                                 }
3438                                         }
3439                                         if (this->InboundServerName != "")
3440                                         {
3441                                                 sourceserv = this->InboundServerName;
3442                                         }
3443                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3444                                 }
3445                                 else if (command == "SVSJOIN")
3446                                 {
3447                                         if (prefix == "")
3448                                         {
3449                                                 prefix = this->GetName();
3450                                         }
3451                                         return this->ServiceJoin(prefix,params);
3452                                 }
3453                                 else if (command == "SQUIT")
3454                                 {
3455                                         if (params.size() == 2)
3456                                         {
3457                                                 this->Squit(Utils->FindServer(params[0]),params[1]);
3458                                         }
3459                                         return true;
3460                                 }
3461                                 else if (command == "OPERNOTICE")
3462                                 {
3463                                         std::string sourceserv = this->myhost;
3464
3465                                         if (this->InboundServerName != "")
3466                                                 sourceserv = this->InboundServerName;
3467
3468                                         if (params.size() >= 1)
3469                                                 Instance->WriteOpers("*** From " + sourceserv + ": " + params[0]);
3470
3471                                         return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
3472                                 }
3473                                 else if (command == "MODENOTICE")
3474                                 {
3475                                         std::string sourceserv = this->myhost;
3476                                         if (this->InboundServerName != "")
3477                                                 sourceserv = this->InboundServerName;
3478                                         if (params.size() >= 2)
3479                                         {
3480                                                 Instance->WriteMode(params[0].c_str(), WM_AND, "*** From %s: %s", sourceserv.c_str(), params[1].c_str());
3481                                         }
3482
3483                                         return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
3484                                 }
3485                                 else if (command == "SNONOTICE")
3486                                 {
3487                                         std::string sourceserv = this->myhost;
3488                                         if (this->InboundServerName != "")
3489                                                 sourceserv = this->InboundServerName;
3490                                         if (params.size() >= 2)
3491                                         {
3492                                                 Instance->SNO->WriteToSnoMask(*(params[0].c_str()), "From " + sourceserv + ": "+ params[1]);
3493                                         }
3494
3495                                         return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
3496                                 }
3497                                 else if (command == "ENDBURST")
3498                                 {
3499                                         this->bursting = false;
3500                                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3501                                         std::string sourceserv = this->myhost;
3502                                         if (this->InboundServerName != "")
3503                                         {
3504                                                 sourceserv = this->InboundServerName;
3505                                         }
3506                                         this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
3507
3508                                         Event rmode((char*)sourceserv.c_str(), (Module*)Utils->Creator, "new_server");
3509                                         rmode.Send(Instance);
3510
3511                                         return true;
3512                                 }
3513                                 else
3514                                 {
3515                                         // not a special inter-server command.
3516                                         // Emulate the actual user doing the command,
3517                                         // this saves us having a huge ugly parser.
3518                                         userrec* who = this->Instance->FindNick(prefix);
3519                                         std::string sourceserv = this->myhost;
3520                                         if (this->InboundServerName != "")
3521                                         {
3522                                                 sourceserv = this->InboundServerName;
3523                                         }
3524                                         if ((!who) && (command == "MODE"))
3525                                         {
3526                                                 if (Utils->IsServer(prefix))
3527                                                 {
3528                                                         const char* modelist[127];
3529                                                         for (size_t i = 0; i < params.size(); i++)
3530                                                                 modelist[i] = params[i].c_str();
3531
3532                                                         userrec* fake = new userrec(Instance);
3533                                                         fake->SetFd(FD_MAGIC_NUMBER);
3534
3535                                                         this->Instance->SendMode(modelist, params.size(), fake);
3536
3537                                                         delete fake;
3538
3539                                                         /* Hot potato! pass it on! */
3540                                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3541                                                 }
3542                                         }
3543                                         if (who)
3544                                         {
3545                                                 if ((command == "NICK") && (params.size() > 0))
3546                                                 {
3547                                                         /* On nick messages, check that the nick doesnt
3548                                                          * already exist here. If it does, kill their copy,
3549                                                          * and our copy.
3550                                                          */
3551                                                         userrec* x = this->Instance->FindNick(params[0]);
3552                                                         if ((x) && (x != who))
3553                                                         {
3554                                                                 std::deque<std::string> p;
3555                                                                 p.push_back(params[0]);
3556                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
3557                                                                 Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3558                                                                 p.clear();
3559                                                                 p.push_back(prefix);
3560                                                                 p.push_back("Nickname collision");
3561                                                                 Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3562                                                                 userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
3563                                                                 userrec* y = this->Instance->FindNick(prefix);
3564                                                                 if (y)
3565                                                                 {
3566                                                                         userrec::QuitUser(this->Instance,y,"Nickname collision");
3567                                                                 }
3568                                                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3569                                                         }
3570                                                 }
3571                                                 // its a user
3572                                                 target = who->server;
3573                                                 const char* strparams[127];
3574                                                 for (unsigned int q = 0; q < params.size(); q++)
3575                                                 {
3576                                                         strparams[q] = params[q].c_str();
3577                                                 }
3578                                                 switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
3579                                                 {
3580                                                         case CMD_INVALID:
3581                                                                 this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
3582                                                                 return false;
3583                                                         break;
3584                                                         case CMD_FAILURE:
3585                                                                 return true;
3586                                                         break;
3587                                                         default:
3588                                                                 /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
3589                                                         break;
3590                                                 }
3591                                         }
3592                                         else
3593                                         {
3594                                                 // its not a user. Its either a server, or somethings screwed up.
3595                                                 if (Utils->IsServer(prefix))
3596                                                 {
3597                                                         target = this->Instance->Config->ServerName;
3598                                                 }
3599                                                 else
3600                                                 {
3601                                                         Instance->Log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
3602                                                         return true;
3603                                                 }
3604                                         }
3605                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3606
3607                                 }
3608                                 return true;
3609                         break;
3610                 }
3611                 return true;
3612         }
3613
3614         virtual std::string GetName()
3615         {
3616                 std::string sourceserv = this->myhost;
3617                 if (this->InboundServerName != "")
3618                 {
3619                         sourceserv = this->InboundServerName;
3620                 }
3621                 return sourceserv;
3622         }
3623
3624         virtual void OnTimeout()
3625         {
3626                 if (this->LinkState == CONNECTING)
3627                 {
3628                         this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out.");
3629                         Link* MyLink = Utils->FindLink(myhost);
3630                         if (MyLink)
3631                                 Utils->DoFailOver(MyLink);
3632                 }
3633         }
3634
3635         virtual void OnClose()
3636         {
3637                 // Connection closed.
3638                 // If the connection is fully up (state CONNECTED)
3639                 // then propogate a netsplit to all peers.
3640                 std::string quitserver = this->myhost;
3641                 if (this->InboundServerName != "")
3642                 {
3643                         quitserver = this->InboundServerName;
3644                 }
3645                 TreeServer* s = Utils->FindServer(quitserver);
3646                 if (s)
3647                 {
3648                         Squit(s,"Remote host closed the connection");
3649                 }
3650
3651                 if (quitserver != "")
3652                         this->Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' failed.",quitserver.c_str());
3653         }
3654
3655         virtual int OnIncomingConnection(int newsock, char* ip)
3656         {
3657                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
3658                  * or discovering if this port is the server port, we don't allow connections from any
3659                  * IPs for which we don't have a link block.
3660                  */
3661                 bool found = false;
3662
3663                 found = (std::find(Utils->ValidIPs.begin(), Utils->ValidIPs.end(), ip) != Utils->ValidIPs.end());
3664                 if (!found)
3665                 {
3666                         for (vector<std::string>::iterator i = Utils->ValidIPs.begin(); i != Utils->ValidIPs.end(); i++)
3667                                 if (irc::sockets::MatchCIDR(ip, (*i).c_str()))
3668                                         found = true;
3669
3670                         if (!found)
3671                         {
3672                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from %s denied (no link blocks with that IP address)", ip);
3673                                 close(newsock);
3674                                 return false;
3675                         }
3676                 }
3677
3678                 TreeSocket* s = new TreeSocket(this->Utils, this->Instance, newsock, ip, this->Hook);
3679
3680                 s = s; /* Whinge whinge whinge, thats all GCC ever does. */
3681                 return true;
3682         }
3683 };
3684
3685 /** This class is used to resolve server hostnames during /connect and autoconnect.
3686  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
3687  * resolver step first ourselves if we need it. This is totally nonblocking, and will
3688  * callback to OnLookupComplete or OnError when completed. Once it has completed we
3689  * will have an IP address which we can then use to continue our connection.
3690  */
3691 class ServernameResolver : public Resolver
3692 {
3693  private:
3694         /** A copy of the Link tag info for what we're connecting to.
3695          * We take a copy, rather than using a pointer, just in case the
3696          * admin takes the tag away and rehashes while the domain is resolving.
3697          */
3698         Link MyLink;
3699         SpanningTreeUtilities* Utils;
3700  public:
3701         ServernameResolver(Module* me, SpanningTreeUtilities* Util, InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD, me), MyLink(x), Utils(Util)
3702         {
3703                 /* Nothing in here, folks */
3704         }
3705
3706         void OnLookupComplete(const std::string &result)
3707         {
3708                 /* Initiate the connection, now that we have an IP to use.
3709                  * Passing a hostname directly to InspSocket causes it to
3710                  * just bail and set its FD to -1.
3711                  */
3712                 TreeServer* CheckDupe = Utils->FindServer(MyLink.Name.c_str());
3713                 if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
3714                 {
3715
3716                         if ((!MyLink.Hook.empty()) && (Utils->hooks.find(MyLink.Hook.c_str()) ==  Utils->hooks.end()))
3717                                 return;
3718
3719                         TreeSocket* newsocket = new TreeSocket(this->Utils, ServerInstance, result,MyLink.Port,false,MyLink.Timeout ? MyLink.Timeout : 10,MyLink.Name.c_str(),
3720                                         MyLink.Hook.empty() ? NULL : Utils->hooks[MyLink.Hook.c_str()]);
3721                         if (newsocket->GetFd() > -1)
3722                         {
3723                                 /* We're all OK */
3724                         }
3725                         else
3726                         {
3727                                 /* Something barfed, show the opers */
3728                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
3729                                 delete newsocket;
3730                                 Utils->DoFailOver(&MyLink);
3731                         }
3732                 }
3733         }
3734
3735         void OnError(ResolverError e, const std::string &errormessage)
3736         {
3737                 /* Ooops! */
3738                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
3739                 Utils->DoFailOver(&MyLink);
3740         }
3741 };
3742
3743 /** Handle resolving of server IPs for the cache
3744  */
3745 class SecurityIPResolver : public Resolver
3746 {
3747  private:
3748         Link MyLink;
3749         SpanningTreeUtilities* Utils;
3750  public:
3751         SecurityIPResolver(Module* me, SpanningTreeUtilities* U, InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD, me), MyLink(x), Utils(U)
3752         {
3753         }
3754
3755         void OnLookupComplete(const std::string &result)
3756         {
3757                 ServerInstance->Log(DEBUG,"Security IP cache: Adding IP address '%s' for Link '%s'",result.c_str(),MyLink.Name.c_str());
3758                 Utils->ValidIPs.push_back(result);
3759         }
3760
3761         void OnError(ResolverError e, const std::string &errormessage)
3762         {
3763                 ServerInstance->Log(DEBUG,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str());
3764         }
3765 };
3766
3767 SpanningTreeUtilities::SpanningTreeUtilities(InspIRCd* Instance, ModuleSpanningTree* C) : ServerInstance(Instance), Creator(C)
3768 {
3769         Bindings.clear();
3770
3771         this->TreeRoot = new TreeServer(this, ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc);
3772
3773         modulelist* ml = ServerInstance->FindInterface("InspSocketHook");
3774
3775         /* Did we find any modules? */
3776         if (ml)
3777         {
3778                 /* Yes, enumerate them all to find out the hook name */
3779                 for (modulelist::iterator m = ml->begin(); m != ml->end(); m++)
3780                 {
3781                         /* Make a request to it for its name, its implementing
3782                          * InspSocketHook so we know its safe to do this
3783                          */
3784                         std::string name = InspSocketNameRequest((Module*)Creator, *m).Send();
3785                         /* Build a map of them */
3786                         hooks[name.c_str()] = *m;
3787                         hooknames.push_back(name);
3788                         ServerInstance->Log(DEBUG, "Found InspSocketHook interface: '%s' -> '%08x'", name.c_str(), *m);
3789                 }
3790         }
3791
3792         this->ReadConfiguration(true);
3793 }
3794
3795 SpanningTreeUtilities::~SpanningTreeUtilities()
3796 {
3797         for (unsigned int i = 0; i < Bindings.size(); i++)
3798         {
3799                 ServerInstance->Log(DEBUG,"Freeing binding %d of %d",i, Bindings.size());
3800                 ServerInstance->SE->DelFd(Bindings[i]);
3801                 Bindings[i]->Close();
3802                 DELETE(Bindings[i]);
3803         }
3804         ServerInstance->Log(DEBUG,"Freeing connected servers...");
3805         while (TreeRoot->ChildCount())
3806         {
3807                 TreeServer* child_server = TreeRoot->GetChild(0);
3808                 ServerInstance->Log(DEBUG,"Freeing connected server %s", child_server->GetName().c_str());
3809                 if (child_server)
3810                 {
3811                         TreeSocket* sock = child_server->GetSocket();
3812                         ServerInstance->SE->DelFd(sock);
3813                         sock->Close();
3814                         DELETE(sock);
3815                 }
3816         }
3817         delete TreeRoot;
3818 }
3819
3820 void SpanningTreeUtilities::AddThisServer(TreeServer* server, TreeServerList &list)
3821 {
3822         if (list.find(server) == list.end())
3823                 list[server] = server;
3824 }
3825
3826 /** returns a list of DIRECT servernames for a specific channel */
3827 void SpanningTreeUtilities::GetListOfServersForChannel(chanrec* c, TreeServerList &list, char status, const CUList &exempt_list)
3828 {
3829         CUList *ulist;
3830         switch (status)
3831         {
3832                 case '@':
3833                         ulist = c->GetOppedUsers();
3834                 break;
3835                 case '%':
3836                         ulist = c->GetHalfoppedUsers();
3837                 break;
3838                 case '+':
3839                         ulist = c->GetVoicedUsers();
3840                 break;
3841                 default:
3842                         ulist = c->GetUsers();
3843                 break;
3844         }
3845         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
3846         {
3847                 if ((i->second->GetFd() < 0) && (exempt_list.find(i->second) == exempt_list.end()))
3848                 {
3849                         TreeServer* best = this->BestRouteTo(i->second->server);
3850                         if (best)
3851                                 AddThisServer(best,list);
3852                 }
3853         }
3854         return;
3855 }
3856
3857 bool SpanningTreeUtilities::DoOneToAllButSenderRaw(const std::string &data, const std::string &omit, const std::string &prefix, const irc::string &command, std::deque<std::string> &params)
3858 {
3859         char pfx = 0;
3860         TreeServer* omitroute = this->BestRouteTo(omit);
3861         if ((command == "NOTICE") || (command == "PRIVMSG"))
3862         {
3863                 if (params.size() >= 2)
3864                 {
3865                         /* Prefixes */
3866                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
3867                         {
3868                                 pfx = params[0][0];
3869                                 params[0] = params[0].substr(1, params[0].length()-1);
3870                         }
3871                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
3872                         {
3873                                 // special routing for private messages/notices
3874                                 userrec* d = ServerInstance->FindNick(params[0]);
3875                                 if (d)
3876                                 {
3877                                         std::deque<std::string> par;
3878                                         par.push_back(params[0]);
3879                                         par.push_back(":"+params[1]);
3880                                         this->DoOneToOne(prefix,command.c_str(),par,d->server);
3881                                         return true;
3882                                 }
3883                         }
3884                         else if (*(params[0].c_str()) == '$')
3885                         {
3886                                 std::deque<std::string> par;
3887                                 par.push_back(params[0]);
3888                                 par.push_back(":"+params[1]);
3889                                 this->DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
3890                                 return true;
3891                         }
3892                         else
3893                         {
3894                                 chanrec* c = ServerInstance->FindChan(params[0]);
3895                                 userrec* u = ServerInstance->FindNick(prefix);
3896                                 if (c && u)
3897                                 {
3898                                         CUList elist;
3899                                         TreeServerList list;
3900                                         FOREACH_MOD(I_OnBuildExemptList, OnBuildExemptList((command == "PRIVMSG" ? MSG_PRIVMSG : MSG_NOTICE), c, u, pfx, elist));
3901                                         GetListOfServersForChannel(c,list,pfx,elist);
3902
3903                                         for (TreeServerList::iterator i = list.begin(); i != list.end(); i++)
3904                                         {
3905                                                 TreeSocket* Sock = i->second->GetSocket();
3906                                                 if ((Sock) && (i->second->GetName() != omit) && (omitroute != i->second))
3907                                                 {
3908                                                         Sock->WriteLine(data);
3909                                                 }
3910                                         }
3911                                         return true;
3912                                 }
3913                         }
3914                 }
3915         }
3916         unsigned int items =this->TreeRoot->ChildCount();
3917         for (unsigned int x = 0; x < items; x++)
3918         {
3919                 TreeServer* Route = this->TreeRoot->GetChild(x);
3920                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3921                 {
3922                         TreeSocket* Sock = Route->GetSocket();
3923                         if (Sock)
3924                                 Sock->WriteLine(data);
3925                 }
3926         }
3927         return true;
3928 }
3929
3930 bool SpanningTreeUtilities::DoOneToAllButSender(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string omit)
3931 {
3932         TreeServer* omitroute = this->BestRouteTo(omit);
3933         std::string FullLine = ":" + prefix + " " + command;
3934         unsigned int words = params.size();
3935         for (unsigned int x = 0; x < words; x++)
3936         {
3937                 FullLine = FullLine + " " + params[x];
3938         }
3939         unsigned int items = this->TreeRoot->ChildCount();
3940         for (unsigned int x = 0; x < items; x++)
3941         {
3942                 TreeServer* Route = this->TreeRoot->GetChild(x);
3943                 // Send the line IF:
3944                 // The route has a socket (its a direct connection)
3945                 // The route isnt the one to be omitted
3946                 // The route isnt the path to the one to be omitted
3947                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3948                 {
3949                         TreeSocket* Sock = Route->GetSocket();
3950                         if (Sock)
3951                                 Sock->WriteLine(FullLine);
3952                 }
3953         }
3954         return true;
3955 }
3956
3957 bool SpanningTreeUtilities::DoOneToMany(const std::string &prefix, const std::string &command, std::deque<std::string> &params)
3958 {
3959         std::string FullLine = ":" + prefix + " " + command;
3960         unsigned int words = params.size();
3961         for (unsigned int x = 0; x < words; x++)
3962         {
3963                 FullLine = FullLine + " " + params[x];
3964         }
3965         unsigned int items = this->TreeRoot->ChildCount();
3966         for (unsigned int x = 0; x < items; x++)
3967         {
3968                 TreeServer* Route = this->TreeRoot->GetChild(x);
3969                 if (Route && Route->GetSocket())
3970                 {
3971                         TreeSocket* Sock = Route->GetSocket();
3972                         if (Sock)
3973                                 Sock->WriteLine(FullLine);
3974                 }
3975         }
3976         return true;
3977 }
3978
3979 bool SpanningTreeUtilities::DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params)
3980 {
3981         std::string spfx = prefix;
3982         std::string scmd = command;
3983         return this->DoOneToMany(spfx, scmd, params);
3984 }
3985
3986 bool SpanningTreeUtilities::DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit)
3987 {
3988         std::string spfx = prefix;
3989         std::string scmd = command;
3990         return this->DoOneToAllButSender(spfx, scmd, params, omit);
3991 }
3992
3993 bool SpanningTreeUtilities::DoOneToOne(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string target)
3994 {
3995         TreeServer* Route = this->BestRouteTo(target);
3996         if (Route)
3997         {
3998                 std::string FullLine = ":" + prefix + " " + command;
3999                 unsigned int words = params.size();
4000                 for (unsigned int x = 0; x < words; x++)
4001                 {
4002                         FullLine = FullLine + " " + params[x];
4003                 }
4004                 if (Route && Route->GetSocket())
4005                 {
4006                         TreeSocket* Sock = Route->GetSocket();
4007                         if (Sock)
4008                                 Sock->WriteLine(FullLine);
4009                 }
4010                 return true;
4011         }
4012         else
4013         {
4014                 return false;
4015         }
4016 }
4017
4018 void SpanningTreeUtilities::ReadConfiguration(bool rebind)
4019 {
4020         ConfigReader* Conf = new ConfigReader(ServerInstance);
4021         if (rebind)
4022         {
4023                 for (int j =0; j < Conf->Enumerate("bind"); j++)
4024                 {
4025                         std::string Type = Conf->ReadValue("bind","type",j);
4026                         std::string IP = Conf->ReadValue("bind","address",j);
4027                         std::string Port = Conf->ReadValue("bind","port",j);
4028                         std::string transport = Conf->ReadValue("bind","transport",j);
4029                         if (Type == "servers")
4030                         {
4031                                 irc::portparser portrange(Port, false);
4032                                 int portno = -1;
4033                                 while ((portno = portrange.GetToken()))
4034                                 {
4035                                         ServerInstance->Log(DEBUG,"m_spanningtree: Binding server port %s:%d", IP.c_str(), portno);
4036                                         if (IP == "*")
4037                                                 IP = "";
4038
4039                                         if ((!transport.empty()) && (hooks.find(transport.c_str()) ==  hooks.end()))
4040                                         {
4041                                                 ServerInstance->Log(DEFAULT,"m_spanningtree: WARNING: Can't find transport type '%s' for port %s:%s - maybe you forgot to load it BEFORE m_spanningtree in your config file? - Skipping this port binding",
4042                                                                 transport.c_str(), IP.c_str(), Port.c_str());
4043                                                 break;
4044                                         }
4045
4046                                         TreeSocket* listener = new TreeSocket(this, ServerInstance, IP.c_str(), portno, true, 10, transport.empty() ? NULL : hooks[transport.c_str()]);
4047                                         if (listener->GetState() == I_LISTENING)
4048                                         {
4049                                                 ServerInstance->Log(DEFAULT,"m_spanningtree: Binding server port %s:%d successful!", IP.c_str(), portno);
4050                                                 Bindings.push_back(listener);
4051                                         }
4052                                         else
4053                                         {
4054                                                 ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %s:%d",IP.c_str(), portno);
4055                                                 listener->Close();
4056                                                 DELETE(listener);
4057                                         }
4058                                         ServerInstance->Log(DEBUG,"Done with this binding");
4059                                 }
4060                         }
4061                 }
4062         }
4063         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
4064         HideULines = Conf->ReadFlag("options","hideulines",0);
4065         AnnounceTSChange = Conf->ReadFlag("options","announcets",0);
4066         EnableTimeSync = !(Conf->ReadFlag("options","notimesync",0));
4067         LinkBlocks.clear();
4068         ValidIPs.clear();
4069         for (int j =0; j < Conf->Enumerate("link"); j++)
4070         {
4071                 Link L;
4072                 std::string Allow = Conf->ReadValue("link","allowmask",j);
4073                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
4074                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
4075                 L.FailOver = Conf->ReadValue("link","failover",j).c_str();
4076                 L.Port = Conf->ReadInteger("link","port",j,true);
4077                 L.SendPass = Conf->ReadValue("link","sendpass",j);
4078                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
4079                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
4080                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
4081                 L.Timeout = Conf->ReadInteger("link","timeout",j,true);
4082                 L.Hook = Conf->ReadValue("link", "transport", j);
4083
4084                 if ((!L.Hook.empty()) && (hooks.find(L.Hook.c_str()) ==  hooks.end()))
4085                 {
4086                         ServerInstance->Log(DEFAULT,"m_spanningtree: WARNING: Can't find transport type '%s' for link '%s' - maybe you forgot to load it BEFORE m_spanningtree in your config file? Skipping <link> tag completely.",
4087                                         L.Hook.c_str(), L.Name.c_str());
4088                         continue;
4089
4090                 }
4091
4092                 L.NextConnectTime = time(NULL) + L.AutoConnect;
4093                 /* Bugfix by brain, do not allow people to enter bad configurations */
4094                 if (L.Name != ServerInstance->Config->ServerName)
4095                 {
4096                         if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
4097                         {
4098                                 ValidIPs.push_back(L.IPAddr);
4099
4100                                 if (Allow.length())
4101                                         ValidIPs.push_back(Allow);
4102
4103                                 /* Needs resolving */
4104                                 insp_inaddr binip;
4105                                 if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
4106                                 {
4107                                         try
4108                                         {
4109                                                 SecurityIPResolver* sr = new SecurityIPResolver((Module*)this->Creator, this, ServerInstance, L.IPAddr, L);
4110                                                 ServerInstance->AddResolver(sr);
4111                                         }
4112                                         catch (ModuleException& e)
4113                                         {
4114                                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4115                                         }
4116                                 }
4117
4118                                 LinkBlocks.push_back(L);
4119                                 ServerInstance->Log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
4120                         }
4121                         else
4122                         {
4123                                 if (L.IPAddr == "")
4124                                 {
4125                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
4126                                 }
4127                                 else if (L.RecvPass == "")
4128                                 {
4129                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
4130                                 }
4131                                 else if (L.SendPass == "")
4132                                 {
4133                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
4134                                 }
4135                                 else if (L.Name == "")
4136                                 {
4137                                         ServerInstance->Log(DEFAULT,"Invalid configuration, link tag without a name!");
4138                                 }
4139                                 else if (!L.Port)
4140                                 {
4141                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
4142                                 }
4143                         }
4144                 }
4145                 else
4146                 {
4147                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', link tag has the same server name as the local server!",L.Name.c_str());
4148                 }
4149         }
4150         DELETE(Conf);
4151 }
4152
4153 /** To create a timer which recurs every second, we inherit from InspTimer.
4154  * InspTimer is only one-shot however, so at the end of each Tick() we simply
4155  * insert another of ourselves into the pending queue :)
4156  */
4157 class TimeSyncTimer : public InspTimer
4158 {
4159  private:
4160         InspIRCd *Instance;
4161         ModuleSpanningTree *Module;
4162  public:
4163         TimeSyncTimer(InspIRCd *Instance, ModuleSpanningTree *Mod);
4164         virtual void Tick(time_t TIME);
4165 };
4166
4167 HandshakeTimer::HandshakeTimer(InspIRCd* Inst, TreeSocket* s, Link* l, SpanningTreeUtilities* u) : InspTimer(1, time(NULL)), Instance(Inst), sock(s), lnk(l), Utils(u)
4168 {
4169         thefd = sock->GetFd();
4170 }
4171
4172 void HandshakeTimer::Tick(time_t TIME)
4173 {
4174         if (Instance->SE->GetRef(thefd) == sock)
4175         {
4176                 if (sock->GetHook() && InspSocketHSCompleteRequest(sock, (Module*)Utils->Creator, sock->GetHook()).Send())
4177                 {
4178                         Instance->Log(DEBUG,"Handshake timer activated, sending SERVER and/or CAPAB");
4179                         InspSocketAttachCertRequest(sock, (Module*)Utils->Creator, sock->GetHook()).Send();
4180                         sock->SendCapabilities();
4181                         if (sock->GetLinkState() == CONNECTING)
4182                         {
4183                                 sock->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+lnk->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
4184                         }
4185                 }
4186                 else
4187                 {
4188                         Instance->Timers->AddTimer(new HandshakeTimer(Instance, sock, lnk, Utils));
4189                 }
4190         }
4191 }
4192
4193 class ModuleSpanningTree : public Module
4194 {
4195         int line;
4196         int NumServers;
4197         unsigned int max_local;
4198         unsigned int max_global;
4199         cmd_rconnect* command_rconnect;
4200         SpanningTreeUtilities* Utils;
4201
4202  public:
4203         TimeSyncTimer *SyncTimer;
4204
4205         ModuleSpanningTree(InspIRCd* Me)
4206                 : Module::Module(Me), max_local(0), max_global(0)
4207         {
4208                 ServerInstance->UseInterface("InspSocketHook");
4209
4210                 Utils = new SpanningTreeUtilities(Me, this);
4211
4212                 command_rconnect = new cmd_rconnect(ServerInstance, this, Utils);
4213                 ServerInstance->AddCommand(command_rconnect);
4214
4215                 if (Utils->EnableTimeSync)
4216                 {
4217                         SyncTimer = new TimeSyncTimer(ServerInstance, this);
4218                         ServerInstance->Timers->AddTimer(SyncTimer);
4219                 }
4220                 else
4221                         SyncTimer = NULL;
4222         }
4223
4224         void ShowLinks(TreeServer* Current, userrec* user, int hops)
4225         {
4226                 std::string Parent = Utils->TreeRoot->GetName();
4227                 if (Current->GetParent())
4228                 {
4229                         Parent = Current->GetParent()->GetName();
4230                 }
4231                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
4232                 {
4233                         if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
4234                         {
4235                                 if (*user->oper)
4236                                 {
4237                                          ShowLinks(Current->GetChild(q),user,hops+1);
4238                                 }
4239                         }
4240                         else
4241                         {
4242                                 ShowLinks(Current->GetChild(q),user,hops+1);
4243                         }
4244                 }
4245                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
4246                 if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetName().c_str())) && (!*user->oper))
4247                         return;
4248                 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());
4249         }
4250
4251         int CountLocalServs()
4252         {
4253                 return Utils->TreeRoot->ChildCount();
4254         }
4255
4256         int CountServs()
4257         {
4258                 return Utils->serverlist.size();
4259         }
4260
4261         void HandleLinks(const char** parameters, int pcnt, userrec* user)
4262         {
4263                 ShowLinks(Utils->TreeRoot,user,0);
4264                 user->WriteServ("365 %s * :End of /LINKS list.",user->nick);
4265                 return;
4266         }
4267
4268         void HandleLusers(const char** parameters, int pcnt, userrec* user)
4269         {
4270                 unsigned int n_users = ServerInstance->UserCount();
4271
4272                 /* Only update these when someone wants to see them, more efficient */
4273                 if ((unsigned int)ServerInstance->LocalUserCount() > max_local)
4274                         max_local = ServerInstance->LocalUserCount();
4275                 if (n_users > max_global)
4276                         max_global = n_users;
4277
4278                 unsigned int ulined_count = 0;
4279                 unsigned int ulined_local_count = 0;
4280
4281                 /* If ulined are hidden and we're not an oper, count the number of ulined servers hidden,
4282                  * locally and globally (locally means directly connected to us)
4283                  */
4284                 if ((Utils->HideULines) && (!*user->oper))
4285                 {
4286                         for (server_hash::iterator q = Utils->serverlist.begin(); q != Utils->serverlist.end(); q++)
4287                         {
4288                                 if (ServerInstance->ULine(q->second->GetName().c_str()))
4289                                 {
4290                                         ulined_count++;
4291                                         if (q->second->GetParent() == Utils->TreeRoot)
4292                                                 ulined_local_count++;
4293                                 }
4294                         }
4295                 }
4296
4297                 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());
4298                 if (ServerInstance->OperCount())
4299                         user->WriteServ("252 %s %d :operator(s) online",user->nick,ServerInstance->OperCount());
4300                 if (ServerInstance->UnregisteredUserCount())
4301                         user->WriteServ("253 %s %d :unknown connections",user->nick,ServerInstance->UnregisteredUserCount());
4302                 if (ServerInstance->ChannelCount())
4303                         user->WriteServ("254 %s %d :channels formed",user->nick,ServerInstance->ChannelCount());
4304                 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());
4305                 user->WriteServ("265 %s :Current Local Users: %d  Max: %d",user->nick,ServerInstance->LocalUserCount(),max_local);
4306                 user->WriteServ("266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
4307                 return;
4308         }
4309
4310         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
4311
4312         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
4313         {
4314                 if (line < 128)
4315                 {
4316                         for (int t = 0; t < depth; t++)
4317                         {
4318                                 matrix[line][t] = ' ';
4319                         }
4320
4321                         // For Aligning, we need to work out exactly how deep this thing is, and produce
4322                         // a 'Spacer' String to compensate.
4323                         char spacer[40];
4324
4325                         memset(spacer,' ',40);
4326                         if ((40 - Current->GetName().length() - depth) > 1) {
4327                                 spacer[40 - Current->GetName().length() - depth] = '\0';
4328                         }
4329                         else
4330                         {
4331                                 spacer[5] = '\0';
4332                         }
4333
4334                         float percent;
4335                         char text[80];
4336                         if (ServerInstance->clientlist->size() == 0) {
4337                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
4338                                 percent = 0;
4339                         }
4340                         else
4341                         {
4342                                 percent = ((float)Current->GetUserCount() / (float)ServerInstance->clientlist->size()) * 100;
4343                         }
4344                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
4345                         totusers += Current->GetUserCount();
4346                         totservers++;
4347                         strlcpy(&matrix[line][depth],text,80);
4348                         line++;
4349                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
4350                         {
4351                                 if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
4352                                 {
4353                                         if (*user->oper)
4354                                         {
4355                                                 ShowMap(Current->GetChild(q),user,(Utils->FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
4356                                         }
4357                                 }
4358                                 else
4359                                 {
4360                                         ShowMap(Current->GetChild(q),user,(Utils->FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
4361                                 }
4362                         }
4363                 }
4364         }
4365
4366         int HandleMotd(const char** parameters, int pcnt, userrec* user)
4367         {
4368                 if (pcnt > 0)
4369                 {
4370                         /* Remote MOTD, the server is within the 1st parameter */
4371                         std::deque<std::string> params;
4372                         params.push_back(parameters[0]);
4373
4374                         /* Send it out remotely, generate no reply yet */
4375                         TreeServer* s = Utils->FindServerMask(parameters[0]);
4376                         if (s)
4377                         {
4378                                 Utils->DoOneToOne(user->nick, "MOTD", params, s->GetName());
4379                         }
4380                         else
4381                         {
4382                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4383                         }
4384                         return 1;
4385                 }
4386                 return 0;
4387         }
4388
4389         int HandleAdmin(const char** parameters, int pcnt, userrec* user)
4390         {
4391                 if (pcnt > 0)
4392                 {
4393                         /* Remote ADMIN, the server is within the 1st parameter */
4394                         std::deque<std::string> params;
4395                         params.push_back(parameters[0]);
4396
4397                         /* Send it out remotely, generate no reply yet */
4398                         TreeServer* s = Utils->FindServerMask(parameters[0]);
4399                         if (s)
4400                         {
4401                                 Utils->DoOneToOne(user->nick, "ADMIN", params, s->GetName());
4402                         }
4403                         else
4404                         {
4405                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4406                         }
4407                         return 1;
4408                 }
4409                 return 0;
4410         }
4411
4412         int HandleStats(const char** parameters, int pcnt, userrec* user)
4413         {
4414                 if (pcnt > 1)
4415                 {
4416                         /* Remote STATS, the server is within the 2nd parameter */
4417                         std::deque<std::string> params;
4418                         params.push_back(parameters[0]);
4419                         params.push_back(parameters[1]);
4420                         /* Send it out remotely, generate no reply yet */
4421                         TreeServer* s = Utils->FindServerMask(parameters[1]);
4422                         if (s)
4423                         {
4424                                 params[1] = s->GetName();
4425                                 Utils->DoOneToOne(user->nick, "STATS", params, s->GetName());
4426                         }
4427                         else
4428                         {
4429                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4430                         }
4431                         return 1;
4432                 }
4433                 return 0;
4434         }
4435
4436         // Ok, prepare to be confused.
4437         // After much mulling over how to approach this, it struck me that
4438         // the 'usual' way of doing a /MAP isnt the best way. Instead of
4439         // keeping track of a ton of ascii characters, and line by line
4440         // under recursion working out where to place them using multiplications
4441         // and divisons, we instead render the map onto a backplane of characters
4442         // (a character matrix), then draw the branches as a series of "L" shapes
4443         // from the nodes. This is not only friendlier on CPU it uses less stack.
4444
4445         void HandleMap(const char** parameters, int pcnt, userrec* user)
4446         {
4447                 // This array represents a virtual screen which we will
4448                 // "scratch" draw to, as the console device of an irc
4449                 // client does not provide for a proper terminal.
4450                 float totusers = 0;
4451                 float totservers = 0;
4452                 char matrix[128][80];
4453                 for (unsigned int t = 0; t < 128; t++)
4454                 {
4455                         matrix[t][0] = '\0';
4456                 }
4457                 line = 0;
4458                 // The only recursive bit is called here.
4459                 ShowMap(Utils->TreeRoot,user,0,matrix,totusers,totservers);
4460                 // Process each line one by one. The algorithm has a limit of
4461                 // 128 servers (which is far more than a spanning tree should have
4462                 // anyway, so we're ok). This limit can be raised simply by making
4463                 // the character matrix deeper, 128 rows taking 10k of memory.
4464                 for (int l = 1; l < line; l++)
4465                 {
4466                         // scan across the line looking for the start of the
4467                         // servername (the recursive part of the algorithm has placed
4468                         // the servers at indented positions depending on what they
4469                         // are related to)
4470                         int first_nonspace = 0;
4471                         while (matrix[l][first_nonspace] == ' ')
4472                         {
4473                                 first_nonspace++;
4474                         }
4475                         first_nonspace--;
4476                         // Draw the `- (corner) section: this may be overwritten by
4477                         // another L shape passing along the same vertical pane, becoming
4478                         // a |- (branch) section instead.
4479                         matrix[l][first_nonspace] = '-';
4480                         matrix[l][first_nonspace-1] = '`';
4481                         int l2 = l - 1;
4482                         // Draw upwards until we hit the parent server, causing possibly
4483                         // other corners (`-) to become branches (|-)
4484                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
4485                         {
4486                                 matrix[l2][first_nonspace-1] = '|';
4487                                 l2--;
4488                         }
4489                 }
4490                 // dump the whole lot to the user. This is the easy bit, honest.
4491                 for (int t = 0; t < line; t++)
4492                 {
4493                         user->WriteServ("006 %s :%s",user->nick,&matrix[t][0]);
4494                 }
4495                 float avg_users = totusers / totservers;
4496                 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);
4497         user->WriteServ("007 %s :End of /MAP",user->nick);
4498                 return;
4499         }
4500
4501         int HandleSquit(const char** parameters, int pcnt, userrec* user)
4502         {
4503                 TreeServer* s = Utils->FindServerMask(parameters[0]);
4504                 if (s)
4505                 {
4506                         if (s == Utils->TreeRoot)
4507                         {
4508                                 user->WriteServ("NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
4509                                 return 1;
4510                         }
4511                         TreeSocket* sock = s->GetSocket();
4512                         if (sock)
4513                         {
4514                                 ServerInstance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
4515                                 ServerInstance->SNO->WriteToSnoMask('l',"SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
4516                                 sock->Squit(s,std::string("Server quit by ") + user->GetFullRealHost());
4517                                 ServerInstance->SE->DelFd(sock);
4518                                 sock->Close();
4519                                 delete sock;
4520                         }
4521                         else
4522                         {
4523                                 /* route it */
4524                                 std::deque<std::string> params;
4525                                 params.push_back(parameters[0]);
4526                                 params.push_back(std::string(":Server quit by ") + user->GetFullRealHost());
4527                                 Utils->DoOneToOne(user->nick, "RSQUIT", params, parameters[0]);
4528                         }
4529                 }
4530                 else
4531                 {
4532                          user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
4533                 }
4534                 return 1;
4535         }
4536
4537         int HandleTime(const char** parameters, int pcnt, userrec* user)
4538         {
4539                 if ((IS_LOCAL(user)) && (pcnt))
4540                 {
4541                         TreeServer* found = Utils->FindServerMask(parameters[0]);
4542                         if (found)
4543                         {
4544                                 // we dont' override for local server
4545                                 if (found == Utils->TreeRoot)
4546                                         return 0;
4547
4548                                 std::deque<std::string> params;
4549                                 params.push_back(found->GetName());
4550                                 params.push_back(user->nick);
4551                                 Utils->DoOneToOne(ServerInstance->Config->ServerName,"TIME",params,found->GetName());
4552                         }
4553                         else
4554                         {
4555                                 user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4556                         }
4557                 }
4558                 return 1;
4559         }
4560
4561         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
4562         {
4563                 if ((IS_LOCAL(user)) && (pcnt > 1))
4564                 {
4565                         userrec* remote = ServerInstance->FindNick(parameters[1]);
4566                         if ((remote) && (remote->GetFd() < 0))
4567                         {
4568                                 std::deque<std::string> params;
4569                                 params.push_back(parameters[1]);
4570                                 Utils->DoOneToOne(user->nick,"IDLE",params,remote->server);
4571                                 return 1;
4572                         }
4573                         else if (!remote)
4574                         {
4575                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[1]);
4576                                 user->WriteServ("318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
4577                                 return 1;
4578                         }
4579                 }
4580                 return 0;
4581         }
4582
4583         void DoPingChecks(time_t curtime)
4584         {
4585                 for (unsigned int j = 0; j < Utils->TreeRoot->ChildCount(); j++)
4586                 {
4587                         TreeServer* serv = Utils->TreeRoot->GetChild(j);
4588                         TreeSocket* sock = serv->GetSocket();
4589                         if (sock)
4590                         {
4591                                 if (curtime >= serv->NextPingTime())
4592                                 {
4593                                         if (serv->AnsweredLastPing())
4594                                         {
4595                                                 sock->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" PING "+serv->GetName());
4596                                                 serv->SetNextPingTime(curtime + 60);
4597                                         }
4598                                         else
4599                                         {
4600                                                 // they didnt answer, boot them
4601                                                 ServerInstance->SNO->WriteToSnoMask('l',"Server \002%s\002 pinged out",serv->GetName().c_str());
4602                                                 sock->Squit(serv,"Ping timeout");
4603                                                 ServerInstance->SE->DelFd(sock);
4604                                                 sock->Close();
4605                                                 delete sock;
4606                                                 return;
4607                                         }
4608                                 }
4609                         }
4610                 }
4611         }
4612
4613         void ConnectServer(Link* x)
4614         {
4615                 insp_inaddr binip;
4616
4617                 /* Do we already have an IP? If so, no need to resolve it. */
4618                 if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
4619                 {
4620                         /* Gave a hook, but it wasnt one we know */
4621                         if ((!x->Hook.empty()) && (Utils->hooks.find(x->Hook.c_str()) == Utils->hooks.end()))
4622                                 return;
4623
4624                         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()]);
4625                         if (newsocket->GetFd() > -1)
4626                         {
4627                                 /* Handled automatically on success */
4628                         }
4629                         else
4630                         {
4631                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
4632                                 delete newsocket;
4633                                 Utils->DoFailOver(x);
4634                         }
4635                 }
4636                 else
4637                 {
4638                         try
4639                         {
4640                                 ServernameResolver* snr = new ServernameResolver((Module*)this, Utils, ServerInstance,x->IPAddr, *x);
4641                                 ServerInstance->AddResolver(snr);
4642                         }
4643                         catch (ModuleException& e)
4644                         {
4645                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4646                                 Utils->DoFailOver(x);
4647                         }
4648                 }
4649         }
4650
4651         void AutoConnectServers(time_t curtime)
4652         {
4653                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
4654                 {
4655                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
4656                         {
4657                                 ServerInstance->Log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
4658                                 x->NextConnectTime = curtime + x->AutoConnect;
4659                                 TreeServer* CheckDupe = Utils->FindServer(x->Name.c_str());
4660                                 if (x->FailOver.length())
4661                                 {
4662                                         TreeServer* CheckFailOver = Utils->FindServer(x->FailOver.c_str());
4663                                         if (CheckFailOver)
4664                                         {
4665                                                 /* The failover for this server is currently a member of the network.
4666                                                  * The failover probably succeeded, where the main link did not.
4667                                                  * Don't try the main link until the failover is gone again.
4668                                                  */
4669                                                 continue;
4670                                         }
4671                                 }
4672                                 if (!CheckDupe)
4673                                 {
4674                                         // an autoconnected server is not connected. Check if its time to connect it
4675                                         ServerInstance->SNO->WriteToSnoMask('l',"AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
4676                                         this->ConnectServer(&(*x));
4677                                 }
4678                         }
4679                 }
4680         }
4681
4682         int HandleVersion(const char** parameters, int pcnt, userrec* user)
4683         {
4684                 // we've already checked if pcnt > 0, so this is safe
4685                 TreeServer* found = Utils->FindServerMask(parameters[0]);
4686                 if (found)
4687                 {
4688                         std::string Version = found->GetVersion();
4689                         user->WriteServ("351 %s :%s",user->nick,Version.c_str());
4690                         if (found == Utils->TreeRoot)
4691                         {
4692                                 ServerInstance->Config->Send005(user);
4693                         }
4694                 }
4695                 else
4696                 {
4697                         user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4698                 }
4699                 return 1;
4700         }
4701
4702         int HandleConnect(const char** parameters, int pcnt, userrec* user)
4703         {
4704                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
4705                 {
4706                         if (ServerInstance->MatchText(x->Name.c_str(),parameters[0]))
4707                         {
4708                                 TreeServer* CheckDupe = Utils->FindServer(x->Name.c_str());
4709                                 if (!CheckDupe)
4710                                 {
4711                                         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);
4712                                         ConnectServer(&(*x));
4713                                         return 1;
4714                                 }
4715                                 else
4716                                 {
4717                                         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());
4718                                         return 1;
4719                                 }
4720                         }
4721                 }
4722                 user->WriteServ("NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
4723                 return 1;
4724         }
4725
4726         void BroadcastTimeSync()
4727         {
4728                 std::deque<std::string> params;
4729                 params.push_back(ConvToStr(ServerInstance->Time(true)));
4730                 Utils->DoOneToMany(Utils->TreeRoot->GetName(), "TIMESET", params);
4731         }
4732
4733         virtual int OnStats(char statschar, userrec* user, string_list &results)
4734         {
4735                 if ((statschar == 'c') || (statschar == 'n'))
4736                 {
4737                         for (unsigned int i = 0; i < Utils->LinkBlocks.size(); i++)
4738                         {
4739                                 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');
4740                                 if (statschar == 'c')
4741                                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 244 "+user->nick+" H * * "+Utils->LinkBlocks[i].Name.c_str());
4742                         }
4743                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 219 "+user->nick+" "+statschar+" :End of /STATS report");
4744                         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);
4745                         return 1;
4746                 }
4747                 return 0;
4748         }
4749
4750         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
4751         {
4752                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
4753                 if (!validated)
4754                         return 0;
4755
4756                 if (command == "CONNECT")
4757                 {
4758                         return this->HandleConnect(parameters,pcnt,user);
4759                 }
4760                 else if (command == "STATS")
4761                 {
4762                         return this->HandleStats(parameters,pcnt,user);
4763                 }
4764                 else if (command == "MOTD")
4765                 {
4766                         return this->HandleMotd(parameters,pcnt,user);
4767                 }
4768                 else if (command == "ADMIN")
4769                 {
4770                         return this->HandleAdmin(parameters,pcnt,user);
4771                 }
4772                 else if (command == "SQUIT")
4773                 {
4774                         return this->HandleSquit(parameters,pcnt,user);
4775                 }
4776                 else if (command == "MAP")
4777                 {
4778                         this->HandleMap(parameters,pcnt,user);
4779                         return 1;
4780                 }
4781                 else if ((command == "TIME") && (pcnt > 0))
4782                 {
4783                         return this->HandleTime(parameters,pcnt,user);
4784                 }
4785                 else if (command == "LUSERS")
4786                 {
4787                         this->HandleLusers(parameters,pcnt,user);
4788                         return 1;
4789                 }
4790                 else if (command == "LINKS")
4791                 {
4792                         this->HandleLinks(parameters,pcnt,user);
4793                         return 1;
4794                 }
4795                 else if (command == "WHOIS")
4796                 {
4797                         if (pcnt > 1)
4798                         {
4799                                 // remote whois
4800                                 return this->HandleRemoteWhois(parameters,pcnt,user);
4801                         }
4802                 }
4803                 else if ((command == "VERSION") && (pcnt > 0))
4804                 {
4805                         this->HandleVersion(parameters,pcnt,user);
4806                         return 1;
4807                 }
4808
4809                 return 0;
4810         }
4811
4812         virtual void OnPostCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, CmdResult result, const std::string &original_line)
4813         {
4814                 if ((result == CMD_SUCCESS) && (ServerInstance->IsValidModuleCommand(command, pcnt, user)))
4815                 {
4816                         // this bit of code cleverly routes all module commands
4817                         // to all remote severs *automatically* so that modules
4818                         // can just handle commands locally, without having
4819                         // to have any special provision in place for remote
4820                         // commands and linking protocols.
4821                         std::deque<std::string> params;
4822                         params.clear();
4823                         for (int j = 0; j < pcnt; j++)
4824                         {
4825                                 if (strchr(parameters[j],' '))
4826                                 {
4827                                         params.push_back(":" + std::string(parameters[j]));
4828                                 }
4829                                 else
4830                                 {
4831                                         params.push_back(std::string(parameters[j]));
4832                                 }
4833                         }
4834                         ServerInstance->Log(DEBUG,"Globally route '%s'",command.c_str());
4835                         Utils->DoOneToMany(user->nick,command,params);
4836                 }
4837         }
4838
4839         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
4840         {
4841                 TreeServer* s = Utils->FindServer(servername);
4842                 if (s)
4843                 {
4844                         description = s->GetDesc();
4845                 }
4846         }
4847
4848         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
4849         {
4850                 if (IS_LOCAL(source))
4851                 {
4852                         std::deque<std::string> params;
4853                         params.push_back(dest->nick);
4854                         params.push_back(channel->name);
4855                         Utils->DoOneToMany(source->nick,"INVITE",params);
4856                 }
4857         }
4858
4859         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
4860         {
4861                 std::deque<std::string> params;
4862                 params.push_back(chan->name);
4863                 params.push_back(":"+topic);
4864                 Utils->DoOneToMany(user->nick,"TOPIC",params);
4865         }
4866
4867         virtual void OnWallops(userrec* user, const std::string &text)
4868         {
4869                 if (IS_LOCAL(user))
4870                 {
4871                         std::deque<std::string> params;
4872                         params.push_back(":"+text);
4873                         Utils->DoOneToMany(user->nick,"WALLOPS",params);
4874                 }
4875         }
4876
4877         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status, const CUList &exempt_list)
4878         {
4879                 if (target_type == TYPE_USER)
4880                 {
4881                         userrec* d = (userrec*)dest;
4882                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4883                         {
4884                                 std::deque<std::string> params;
4885                                 params.clear();
4886                                 params.push_back(d->nick);
4887                                 params.push_back(":"+text);
4888                                 Utils->DoOneToOne(user->nick,"NOTICE",params,d->server);
4889                         }
4890                 }
4891                 else if (target_type == TYPE_CHANNEL)
4892                 {
4893                         if (IS_LOCAL(user))
4894                         {
4895                                 chanrec *c = (chanrec*)dest;
4896                                 if (c)
4897                                 {
4898                                         std::string cname = c->name;
4899                                         if (status)
4900                                                 cname = status + cname;
4901                                         TreeServerList list;
4902                                         Utils->GetListOfServersForChannel(c,list,status,exempt_list);
4903
4904                                         for (TreeServerList::iterator i = list.begin(); i != list.end(); i++)
4905                                         {
4906                                                 TreeSocket* Sock = i->second->GetSocket();
4907                                                 if (Sock)
4908                                                         Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
4909                                         }
4910                                 }
4911                         }
4912                 }
4913                 else if (target_type == TYPE_SERVER)
4914                 {
4915                         if (IS_LOCAL(user))
4916                         {
4917                                 char* target = (char*)dest;
4918                                 std::deque<std::string> par;
4919                                 par.push_back(target);
4920                                 par.push_back(":"+text);
4921                                 Utils->DoOneToMany(user->nick,"NOTICE",par);
4922                         }
4923                 }
4924         }
4925
4926         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status, const CUList &exempt_list)
4927         {
4928                 if (target_type == TYPE_USER)
4929                 {
4930                         // route private messages which are targetted at clients only to the server
4931                         // which needs to receive them
4932                         userrec* d = (userrec*)dest;
4933                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4934                         {
4935                                 std::deque<std::string> params;
4936                                 params.clear();
4937                                 params.push_back(d->nick);
4938                                 params.push_back(":"+text);
4939                                 Utils->DoOneToOne(user->nick,"PRIVMSG",params,d->server);
4940                         }
4941                 }
4942                 else if (target_type == TYPE_CHANNEL)
4943                 {
4944                         if (IS_LOCAL(user))
4945                         {
4946                                 chanrec *c = (chanrec*)dest;
4947                                 if (c)
4948                                 {
4949                                         std::string cname = c->name;
4950                                         if (status)
4951                                                 cname = status + cname;
4952                                         TreeServerList list;
4953                                         Utils->GetListOfServersForChannel(c,list,status,exempt_list);
4954
4955                                         for (TreeServerList::iterator i = list.begin(); i != list.end(); i++)
4956                                         {
4957                                                 TreeSocket* Sock = i->second->GetSocket();
4958                                                 if (Sock)
4959                                                         Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
4960                                         }
4961                                 }
4962                         }
4963                 }
4964                 else if (target_type == TYPE_SERVER)
4965                 {
4966                         if (IS_LOCAL(user))
4967                         {
4968                                 char* target = (char*)dest;
4969                                 std::deque<std::string> par;
4970                                 par.push_back(target);
4971                                 par.push_back(":"+text);
4972                                 Utils->DoOneToMany(user->nick,"PRIVMSG",par);
4973                         }
4974                 }
4975         }
4976
4977         virtual void OnBackgroundTimer(time_t curtime)
4978         {
4979                 AutoConnectServers(curtime);
4980                 DoPingChecks(curtime);
4981         }
4982
4983         virtual void OnUserJoin(userrec* user, chanrec* channel)
4984         {
4985                 // Only do this for local users
4986                 if (IS_LOCAL(user))
4987                 {
4988                         if (channel->GetUserCounter() == 1)
4989                         {
4990                                 std::deque<std::string> params;
4991                                 // set up their permissions and the channel TS with FJOIN.
4992                                 // All users are FJOINed now, because a module may specify
4993                                 // new joining permissions for the user.
4994                                 params.push_back(channel->name);
4995                                 params.push_back(ConvToStr(channel->age));
4996                                 params.push_back(std::string(channel->GetAllPrefixChars(user))+","+std::string(user->nick));
4997                                 Utils->DoOneToMany(ServerInstance->Config->ServerName,"FJOIN",params);
4998                                 /* First user in, sync the modes for the channel */
4999                                 params.pop_back();
5000                                 /* This is safe, all inspircd servers default to +nt */
5001                                 params.push_back("+nt");
5002                                 Utils->DoOneToMany(ServerInstance->Config->ServerName,"FMODE",params);
5003                         }
5004                         else
5005                         {
5006                                 std::deque<std::string> params;
5007                                 params.push_back(channel->name);
5008                                 params.push_back(ConvToStr(channel->age));
5009                                 Utils->DoOneToMany(user->nick,"JOIN",params);
5010                         }
5011                 }
5012         }
5013
5014         virtual void OnChangeHost(userrec* user, const std::string &newhost)
5015         {
5016                 // only occurs for local clients
5017                 if (user->registered != REG_ALL)
5018                         return;
5019                 std::deque<std::string> params;
5020                 params.push_back(newhost);
5021                 Utils->DoOneToMany(user->nick,"FHOST",params);
5022         }
5023
5024         virtual void OnChangeName(userrec* user, const std::string &gecos)
5025         {
5026                 // only occurs for local clients
5027                 if (user->registered != REG_ALL)
5028                         return;
5029                 std::deque<std::string> params;
5030                 params.push_back(gecos);
5031                 Utils->DoOneToMany(user->nick,"FNAME",params);
5032         }
5033
5034         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
5035         {
5036                 if (IS_LOCAL(user))
5037                 {
5038                         std::deque<std::string> params;
5039                         params.push_back(channel->name);
5040                         if (partmessage != "")
5041                                 params.push_back(":"+partmessage);
5042                         Utils->DoOneToMany(user->nick,"PART",params);
5043                 }
5044         }
5045
5046         virtual void OnUserConnect(userrec* user)
5047         {
5048                 char agestr[MAXBUF];
5049                 if (IS_LOCAL(user))
5050                 {
5051                         std::deque<std::string> params;
5052                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
5053                         params.push_back(agestr);
5054                         params.push_back(user->nick);
5055                         params.push_back(user->host);
5056                         params.push_back(user->dhost);
5057                         params.push_back(user->ident);
5058                         params.push_back("+"+std::string(user->FormatModes()));
5059                         params.push_back(user->GetIPString());
5060                         params.push_back(":"+std::string(user->fullname));
5061                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"NICK",params);
5062
5063                         // User is Local, change needs to be reflected!
5064                         TreeServer* SourceServer = Utils->FindServer(user->server);
5065                         if (SourceServer)
5066                         {
5067                                 SourceServer->AddUserCount();
5068                         }
5069
5070                 }
5071         }
5072
5073         virtual void OnUserQuit(userrec* user, const std::string &reason)
5074         {
5075                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
5076                 {
5077                         std::deque<std::string> params;
5078                         params.push_back(":"+reason);
5079                         Utils->DoOneToMany(user->nick,"QUIT",params);
5080                 }
5081                 // Regardless, We need to modify the user Counts..
5082                 TreeServer* SourceServer = Utils->FindServer(user->server);
5083                 if (SourceServer)
5084                 {
5085                         SourceServer->DelUserCount();
5086                 }
5087
5088         }
5089
5090         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
5091         {
5092                 if (IS_LOCAL(user))
5093                 {
5094                         std::deque<std::string> params;
5095                         params.push_back(user->nick);
5096                         Utils->DoOneToMany(oldnick,"NICK",params);
5097                 }
5098         }
5099
5100         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
5101         {
5102                 if ((source) && (IS_LOCAL(source)))
5103                 {
5104                         std::deque<std::string> params;
5105                         params.push_back(chan->name);
5106                         params.push_back(user->nick);
5107                         params.push_back(":"+reason);
5108                         Utils->DoOneToMany(source->nick,"KICK",params);
5109                 }
5110                 else if (!source)
5111                 {
5112                         std::deque<std::string> params;
5113                         params.push_back(chan->name);
5114                         params.push_back(user->nick);
5115                         params.push_back(":"+reason);
5116                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"KICK",params);
5117                 }
5118         }
5119
5120         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
5121         {
5122                 std::deque<std::string> params;
5123                 params.push_back(dest->nick);
5124                 params.push_back(":"+reason);
5125                 Utils->DoOneToMany(source->nick,"KILL",params);
5126         }
5127
5128         virtual void OnRehash(const std::string &parameter)
5129         {
5130                 if (parameter != "")
5131                 {
5132                         std::deque<std::string> params;
5133                         params.push_back(parameter);
5134                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"REHASH",params);
5135                         // check for self
5136                         if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameter))
5137                         {
5138                                 ServerInstance->WriteOpers("*** Remote rehash initiated from server \002%s\002",ServerInstance->Config->ServerName);
5139                                 ServerInstance->RehashServer();
5140                         }
5141                 }
5142                 Utils->ReadConfiguration(false);
5143         }
5144
5145         // note: the protocol does not allow direct umode +o except
5146         // via NICK with 8 params. sending OPERTYPE infers +o modechange
5147         // locally.
5148         virtual void OnOper(userrec* user, const std::string &opertype)
5149         {
5150                 if (IS_LOCAL(user))
5151                 {
5152                         std::deque<std::string> params;
5153                         params.push_back(opertype);
5154                         Utils->DoOneToMany(user->nick,"OPERTYPE",params);
5155                 }
5156         }
5157
5158         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
5159         {
5160                 if (!source)
5161                 {
5162                         /* Server-set lines */
5163                         char data[MAXBUF];
5164                         snprintf(data,MAXBUF,"%c %s %s %lu %lu :%s", linetype, host.c_str(), ServerInstance->Config->ServerName, (unsigned long)ServerInstance->Time(false),
5165                                         (unsigned long)duration, reason.c_str());
5166                         std::deque<std::string> params;
5167                         params.push_back(data);
5168                         Utils->DoOneToMany(ServerInstance->Config->ServerName, "ADDLINE", params);
5169                 }
5170                 else
5171                 {
5172                         if (IS_LOCAL(source))
5173                         {
5174                                 char type[8];
5175                                 snprintf(type,8,"%cLINE",linetype);
5176                                 std::string stype = type;
5177                                 if (adding)
5178                                 {
5179                                         char sduration[MAXBUF];
5180                                         snprintf(sduration,MAXBUF,"%ld",duration);
5181                                         std::deque<std::string> params;
5182                                         params.push_back(host);
5183                                         params.push_back(sduration);
5184                                         params.push_back(":"+reason);
5185                                         Utils->DoOneToMany(source->nick,stype,params);
5186                                 }
5187                                 else
5188                                 {
5189                                         std::deque<std::string> params;
5190                                         params.push_back(host);
5191                                         Utils->DoOneToMany(source->nick,stype,params);
5192                                 }
5193                         }
5194                 }
5195         }
5196
5197         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
5198         {
5199                 OnLine(source,hostmask,true,'G',duration,reason);
5200         }
5201
5202         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
5203         {
5204                 OnLine(source,ipmask,true,'Z',duration,reason);
5205         }
5206
5207         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
5208         {
5209                 OnLine(source,nickmask,true,'Q',duration,reason);
5210         }
5211
5212         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
5213         {
5214                 OnLine(source,hostmask,true,'E',duration,reason);
5215         }
5216
5217         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
5218         {
5219                 OnLine(source,hostmask,false,'G',0,"");
5220         }
5221
5222         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
5223         {
5224                 OnLine(source,ipmask,false,'Z',0,"");
5225         }
5226
5227         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
5228         {
5229                 OnLine(source,nickmask,false,'Q',0,"");
5230         }
5231
5232         virtual void OnDelELine(userrec* source, const std::string &hostmask)
5233         {
5234                 OnLine(source,hostmask,false,'E',0,"");
5235         }
5236
5237         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
5238         {
5239                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
5240                 {
5241                         if (target_type == TYPE_USER)
5242                         {
5243                                 userrec* u = (userrec*)dest;
5244                                 std::deque<std::string> params;
5245                                 params.push_back(u->nick);
5246                                 params.push_back(text);
5247                                 Utils->DoOneToMany(user->nick,"MODE",params);
5248                         }
5249                         else
5250                         {
5251                                 chanrec* c = (chanrec*)dest;
5252                                 std::deque<std::string> params;
5253                                 params.push_back(c->name);
5254                                 params.push_back(text);
5255                                 Utils->DoOneToMany(user->nick,"MODE",params);
5256                         }
5257                 }
5258         }
5259
5260         virtual void OnSetAway(userrec* user)
5261         {
5262                 if (IS_LOCAL(user))
5263                 {
5264                         std::deque<std::string> params;
5265                         params.push_back(":"+std::string(user->awaymsg));
5266                         Utils->DoOneToMany(user->nick,"AWAY",params);
5267                 }
5268         }
5269
5270         virtual void OnCancelAway(userrec* user)
5271         {
5272                 if (IS_LOCAL(user))
5273                 {
5274                         std::deque<std::string> params;
5275                         params.clear();
5276                         Utils->DoOneToMany(user->nick,"AWAY",params);
5277                 }
5278         }
5279
5280         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
5281         {
5282                 TreeSocket* s = (TreeSocket*)opaque;
5283                 if (target)
5284                 {
5285                         if (target_type == TYPE_USER)
5286                         {
5287                                 userrec* u = (userrec*)target;
5288                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
5289                         }
5290                         else
5291                         {
5292                                 chanrec* c = (chanrec*)target;
5293                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
5294                         }
5295                 }
5296         }
5297
5298         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
5299         {
5300                 TreeSocket* s = (TreeSocket*)opaque;
5301                 if (target)
5302                 {
5303                         if (target_type == TYPE_USER)
5304                         {
5305                                 userrec* u = (userrec*)target;
5306                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+u->nick+" "+extname+" :"+extdata);
5307                         }
5308                         else if (target_type == TYPE_CHANNEL)
5309                         {
5310                                 chanrec* c = (chanrec*)target;
5311                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+c->name+" "+extname+" :"+extdata);
5312                         }
5313                 }
5314                 if (target_type == TYPE_OTHER)
5315                 {
5316                         s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA * "+extname+" :"+extdata);
5317                 }
5318         }
5319
5320         virtual void OnEvent(Event* event)
5321         {
5322                 std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
5323
5324                 if (event->GetEventID() == "send_metadata")
5325                 {
5326                         if (params->size() < 3)
5327                                 return;
5328                         (*params)[2] = ":" + (*params)[2];
5329                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"METADATA",*params);
5330                 }
5331                 else if (event->GetEventID() == "send_topic")
5332                 {
5333                         if (params->size() < 2)
5334                                 return;
5335                         (*params)[1] = ":" + (*params)[1];
5336                         params->insert(params->begin() + 1,ServerInstance->Config->ServerName);
5337                         params->insert(params->begin() + 1,ConvToStr(ServerInstance->Time(true)));
5338                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FTOPIC",*params);
5339                 }
5340                 else if (event->GetEventID() == "send_mode")
5341                 {
5342                         if (params->size() < 2)
5343                                 return;
5344                         // Insert the TS value of the object, either userrec or chanrec
5345                         time_t ourTS = 0;
5346                         userrec* a = ServerInstance->FindNick((*params)[0]);
5347                         if (a)
5348                         {
5349                                 ourTS = a->age;
5350                         }
5351                         else
5352                         {
5353                                 chanrec* a = ServerInstance->FindChan((*params)[0]);
5354                                 if (a)
5355                                 {
5356                                         ourTS = a->age;
5357                                 }
5358                         }
5359                         params->insert(params->begin() + 1,ConvToStr(ourTS));
5360                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FMODE",*params);
5361                 }
5362                 else if (event->GetEventID() == "send_mode_explicit")
5363                 {
5364                         if (params->size() < 2)
5365                                 return;
5366                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"MODE",*params);
5367                 }
5368                 else if (event->GetEventID() == "send_opers")
5369                 {
5370                         if (params->size() < 1)
5371                                 return;
5372                         (*params)[0] = ":" + (*params)[0];
5373                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"OPERNOTICE",*params);
5374                 }
5375                 else if (event->GetEventID() == "send_modeset")
5376                 {
5377                         if (params->size() < 2)
5378                                 return;
5379                         (*params)[1] = ":" + (*params)[1];
5380                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"MODENOTICE",*params);
5381                 }
5382                 else if (event->GetEventID() == "send_snoset")
5383                 {
5384                         if (params->size() < 2)
5385                                 return;
5386                         (*params)[1] = ":" + (*params)[1];
5387                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"SNONOTICE",*params);
5388                 }
5389                 else if (event->GetEventID() == "send_push")
5390                 {
5391                         if (params->size() < 2)
5392                                 return;
5393
5394                         userrec *a = ServerInstance->FindNick((*params)[0]);
5395
5396                         if (!a)
5397                                 return;
5398
5399                         (*params)[1] = ":" + (*params)[1];
5400                         Utils->DoOneToOne(ServerInstance->Config->ServerName, "PUSH", *params, a->server);
5401                 }
5402         }
5403
5404         virtual ~ModuleSpanningTree()
5405         {
5406                 ServerInstance->Log(DEBUG,"Performing unload of spanningtree!");
5407                 /* This will also free the listeners */
5408                 delete Utils;
5409                 if (SyncTimer)
5410                         ServerInstance->Timers->DelTimer(SyncTimer);
5411
5412                 ServerInstance->DoneWithInterface("InspSocketHook");
5413         }
5414
5415         virtual Version GetVersion()
5416         {
5417                 return Version(1,1,0,2,VF_VENDOR,API_VERSION);
5418         }
5419
5420         void Implements(char* List)
5421         {
5422                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
5423                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
5424                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
5425                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
5426                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
5427                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
5428                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = List[I_OnPostCommand] = 1;
5429         }
5430
5431         /* It is IMPORTANT that m_spanningtree is the last module in the chain
5432          * so that any activity it sees is FINAL, e.g. we arent going to send out
5433          * a NICK message before m_cloaking has finished putting the +x on the user,
5434          * etc etc.
5435          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
5436          * the module call queue.
5437          */
5438         Priority Prioritize()
5439         {
5440                 return PRIORITY_LAST;
5441         }
5442 };
5443
5444 TimeSyncTimer::TimeSyncTimer(InspIRCd *Inst, ModuleSpanningTree *Mod) : InspTimer(43200, Inst->Time()), Instance(Inst), Module(Mod)
5445 {
5446 }
5447
5448 void TimeSyncTimer::Tick(time_t TIME)
5449 {
5450         Module->BroadcastTimeSync();
5451         Module->SyncTimer = new TimeSyncTimer(Instance, Module);
5452         Instance->Timers->AddTimer(Module->SyncTimer);
5453 }
5454
5455 void SpanningTreeUtilities::DoFailOver(Link* x)
5456 {
5457         if (x->FailOver.length())
5458         {
5459                 if (x->FailOver == x->Name)
5460                 {
5461                         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());
5462                         return;
5463                 }
5464                 Link* TryThisOne = this->FindLink(x->FailOver.c_str());
5465                 if (TryThisOne)
5466                 {
5467                         ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Trying failover link for \002%s\002: \002%s\002...", x->Name.c_str(), TryThisOne->Name.c_str());
5468                         Creator->ConnectServer(TryThisOne);
5469                 }
5470                 else
5471                 {
5472                         ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Invalid failover server specified for server \002%s\002, will not follow!", x->Name.c_str());
5473                 }
5474         }
5475 }
5476
5477 Link* SpanningTreeUtilities::FindLink(const std::string& name)
5478 {
5479         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
5480         {
5481                 if (ServerInstance->MatchText(x->Name.c_str(), name.c_str()))
5482                 {
5483                         return &(*x);
5484                 }
5485         }
5486         return NULL;
5487 }
5488
5489 class ModuleSpanningTreeFactory : public ModuleFactory
5490 {
5491  public:
5492         ModuleSpanningTreeFactory()
5493         {
5494         }
5495
5496         ~ModuleSpanningTreeFactory()
5497         {
5498         }
5499
5500         virtual Module * CreateModule(InspIRCd* Me)
5501         {
5502                 return new ModuleSpanningTree(Me);
5503         }
5504
5505 };
5506
5507
5508 extern "C" void * init_module( void )
5509 {
5510         return new ModuleSpanningTreeFactory;
5511 }