src/modules/m_spanningtree.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  Inspire is copyright (C) 2002-2005 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 /* $ModDesc: Povides a spanning tree server link protocol */
  18
  19 using namespace std;
  20
  21 #include <stdio.h>
  22 #include <vector>
  23 #include <deque>
  24 #include "globals.h"
  25 #include "inspircd_config.h"
  26 #ifdef GCC3
  27 #include <ext/hash_map>
  28 #else
  29 #include <hash_map>
  30 #endif
  31 #include "users.h"
  32 #include "channels.h"
  33 #include "modules.h"
  34 #include "socket.h"
  35 #include "helperfuncs.h"
  36 #include "inspircd.h"
  37 #include "inspstring.h"
  38 #include "hashcomp.h"
  39 #include "message.h"
  40 #include "xline.h"
  41
  42 #ifdef GCC3
  43 #define nspace __gnu_cxx
  44 #else
  45 #define nspace std
  46 #endif
  47
  48 class ModuleSpanningTree;
  49 static ModuleSpanningTree* TreeProtocolModule;
  50
  51 extern std::vector<Module*> modules;
  52 extern std::vector<ircd_module*> factory;
  53 extern int MODCOUNT;
  54
  55 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  56
  57 typedef nspace::hash_map<std::string, userrec*, nspace::hash<string>, irc::StrHashComp> user_hash;
  58 typedef nspace::hash_map<std::string, chanrec*, nspace::hash<string>, irc::StrHashComp> chan_hash;
  59
  60 extern user_hash clientlist;
  61 extern chan_hash chanlist;
  62
  63 class TreeServer;
  64 class TreeSocket;
  65
  66 TreeServer *TreeRoot;
  67
  68 typedef nspace::hash_map<std::string, TreeServer*> server_hash;
  69 server_hash serverlist;
  70
  71 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> params, std::string target);
  72 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> params, std::string omit);
  73 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> params);
  74 bool DoOneToAllButSenderRaw(std::string data,std::string omit, std::string prefix,std::string command,std::deque<std::string> params);
  75 void ReadConfiguration(bool rebind);
  76
  77 extern std::vector<KLine> klines;
  78 extern std::vector<GLine> glines;
  79 extern std::vector<ZLine> zlines;
  80 extern std::vector<QLine> qlines;
  81 extern std::vector<ELine> elines;
  82
  83 class TreeServer
  84 {
  85         TreeServer* Parent;
  86         TreeServer* Route;
  87         std::vector<TreeServer*> Children;
  88         std::string ServerName;
  89         std::string ServerDesc;
  90         std::string VersionString;
  91         int UserCount;
  92         int OperCount;
  93         TreeSocket* Socket;     // for directly connected servers this points at the socket object
  94         time_t NextPing;
  95         bool LastPingWasGood;
  96
  97  public:
  98
  99         TreeServer()
 100         {
 101                 Parent = NULL;
 102                 ServerName = "";
 103                 ServerDesc = "";
 104                 VersionString = "";
 105                 UserCount = OperCount = 0;
 106                 VersionString = GetVersionString();
 107         }
 108
 109         TreeServer(std::string Name, std::string Desc) : ServerName(Name), ServerDesc(Desc)
 110         {
 111                 Parent = NULL;
 112                 VersionString = "";
 113                 UserCount = OperCount = 0;
 114                 VersionString = GetVersionString();
 115                 Route = NULL;
 116                 AddHashEntry();
 117         }
 118
 119         TreeServer(std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock) : Parent(Above), ServerName(Name), ServerDesc(Desc), Socket(Sock)
 120         {
 121                 VersionString = "";
 122                 UserCount = OperCount = 0;
 123                 this->SetNextPingTime(time(NULL) + 60);
 124                 this->SetPingFlag();
 125
 126                 /* find the 'route' for this server (e.g. the one directly connected
 127                  * to the local server, which we can use to reach it)
 128                  *
 129                  * In the following example, consider we have just added a TreeServer
 130                  * class for server G on our network, of which we are server A.
 131                  * To route traffic to G (marked with a *) we must send the data to
 132                  * B (marked with a +) so this algorithm initializes the 'Route'
 133                  * value to point at whichever server traffic must be routed through
 134                  * to get here. If we were to try this algorithm with server B,
 135                  * the Route pointer would point at its own object ('this').
 136                  *
 137                  *              A
 138                  *             / \
 139                  *          + B   C
 140                  *           / \   \
 141                  *          D   E   F
 142                  *         /         \
 143                  *      * G           H
 144                  *
 145                  * We only run this algorithm when a server is created, as
 146                  * the routes remain constant while ever the server exists, and
 147                  * do not need to be re-calculated.
 148                  */
 149
 150                 Route = Above;
 151                 if (Route == TreeRoot)
 152                 {
 153                         Route = this;
 154                 }
 155                 else
 156                 {
 157                         while (this->Route->GetParent() != TreeRoot)
 158                         {
 159                                 this->Route = Route->GetParent();
 160                         }
 161                 }
 162
 163                 /* Because recursive code is slow and takes a lot of resources,
 164                  * we store two representations of the server tree. The first
 165                  * is a recursive structure where each server references its
 166                  * children and its parent, which is used for netbursts and
 167                  * netsplits to dump the whole dataset to the other server,
 168                  * and the second is used for very fast lookups when routing
 169                  * messages and is instead a hash_map, where each item can
 170                  * be referenced by its server name. The AddHashEntry()
 171                  * call below automatically inserts each TreeServer class
 172                  * into the hash_map as it is created. There is a similar
 173                  * maintainance call in the destructor to tidy up deleted
 174                  * servers.
 175                  */
 176
 177                 this->AddHashEntry();
 178         }
 179
 180         void AddHashEntry()
 181         {
 182                 server_hash::iterator iter;
 183                 iter = serverlist.find(this->ServerName);
 184                 if (iter == serverlist.end())
 185                         serverlist[this->ServerName] = this;
 186         }
 187
 188         void DelHashEntry()
 189         {
 190                 server_hash::iterator iter;
 191                 iter = serverlist.find(this->ServerName);
 192                 if (iter != serverlist.end())
 193                         serverlist.erase(iter);
 194         }
 195
 196         TreeServer* GetRoute()
 197         {
 198                 return Route;
 199         }
 200
 201         std::string GetName()
 202         {
 203                 return this->ServerName;
 204         }
 205
 206         std::string GetDesc()
 207         {
 208                 return this->ServerDesc;
 209         }
 210
 211         std::string GetVersion()
 212         {
 213                 return this->VersionString;
 214         }
 215
 216         void SetNextPingTime(time_t t)
 217         {
 218                 this->NextPing = t;
 219                 LastPingWasGood = false;
 220         }
 221
 222         time_t NextPingTime()
 223         {
 224                 return this->NextPing;
 225         }
 226
 227         bool AnsweredLastPing()
 228         {
 229                 return LastPingWasGood;
 230         }
 231
 232         void SetPingFlag()
 233         {
 234                 LastPingWasGood = true;
 235         }
 236
 237         int GetUserCount()
 238         {
 239                 return this->UserCount;
 240         }
 241
 242         int GetOperCount()
 243         {
 244                 return this->OperCount;
 245         }
 246
 247         TreeSocket* GetSocket()
 248         {
 249                 return this->Socket;
 250         }
 251
 252         TreeServer* GetParent()
 253         {
 254                 return this->Parent;
 255         }
 256
 257         void SetVersion(std::string Version)
 258         {
 259                 VersionString = Version;
 260         }
 261
 262         unsigned int ChildCount()
 263         {
 264                 return Children.size();
 265         }
 266
 267         TreeServer* GetChild(unsigned int n)
 268         {
 269                 if (n < Children.size())
 270                 {
 271                         return Children[n];
 272                 }
 273                 else
 274                 {
 275                         return NULL;
 276                 }
 277         }
 278
 279         void AddChild(TreeServer* Child)
 280         {
 281                 Children.push_back(Child);
 282         }
 283
 284         bool DelChild(TreeServer* Child)
 285         {
 286                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 287                 {
 288                         if (*a == Child)
 289                         {
 290                                 Children.erase(a);
 291                                 return true;
 292                         }
 293                 }
 294                 return false;
 295         }
 296
 297         /* Removes child nodes of this node, and of that node, etc etc.
 298          * This is used during netsplits to automatically tidy up the
 299          * server tree. It is slow, we don't use it for much else.
 300          */
 301         bool Tidy()
 302         {
 303                 bool stillchildren = true;
 304                 while (stillchildren)
 305                 {
 306                         stillchildren = false;
 307                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 308                         {
 309                                 TreeServer* s = (TreeServer*)*a;
 310                                 s->Tidy();
 311                                 Children.erase(a);
 312                                 delete s;
 313                                 stillchildren = true;
 314                                 break;
 315                         }
 316                 }
 317                 return true;
 318         }
 319
 320         ~TreeServer()
 321         {
 322                 this->DelHashEntry();
 323         }
 324 };
 325
 326 class Link
 327 {
 328  public:
 329          std::string Name;
 330          std::string IPAddr;
 331          int Port;
 332          std::string SendPass;
 333          std::string RecvPass;
 334          unsigned long AutoConnect;
 335          time_t NextConnectTime;
 336 };
 337
 338 Server *Srv;
 339 ConfigReader *Conf;
 340 std::vector<Link> LinkBlocks;
 341
 342 TreeServer* FindServer(std::string ServerName)
 343 {
 344         server_hash::iterator iter;
 345         iter = serverlist.find(ServerName);
 346         if (iter != serverlist.end())
 347         {
 348                 return iter->second;
 349         }
 350         else
 351         {
 352                 return NULL;
 353         }
 354 }
 355
 356 /* Returns the locally connected server we must route a
 357  * message through to reach server 'ServerName'. This
 358  * only applies to one-to-one and not one-to-many routing.
 359  * See the comments for the constructor of TreeServer
 360  * for more details.
 361  */
 362 TreeServer* BestRouteTo(std::string ServerName)
 363 {
 364         if (ServerName.c_str() == TreeRoot->GetName())
 365                 return NULL;
 366         TreeServer* Found = FindServer(ServerName);
 367         if (Found)
 368         {
 369                 return Found->GetRoute();
 370         }
 371         else
 372         {
 373                 return NULL;
 374         }
 375 }
 376
 377 TreeServer* Found;
 378
 379 /* TODO: These need optimizing to use an iterator of serverlist
 380  */
 381 void RFindServerMask(TreeServer* Current, std::string ServerName)
 382 {
 383         if (Srv->MatchText(Current->GetName(),ServerName) && (!Found))
 384         {
 385                 Found = Current;
 386                 return;
 387         }
 388         if (!Found)
 389         {
 390                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 391                 {
 392                         if (!Found)
 393                                 RFindServerMask(Current->GetChild(q),ServerName);
 394                 }
 395         }
 396 }
 397
 398 TreeServer* FindServerMask(std::string ServerName)
 399 {
 400         Found = NULL;
 401         RFindServerMask(TreeRoot,ServerName);
 402         return Found;
 403 }
 404
 405 bool IsServer(std::string ServerName)
 406 {
 407         return (FindServer(ServerName) != NULL);
 408 }
 409
 410 class TreeSocket : public InspSocket
 411 {
 412         std::string myhost;
 413         std::string in_buffer;
 414         ServerState LinkState;
 415         std::string InboundServerName;
 416         std::string InboundDescription;
 417         int num_lost_users;
 418         int num_lost_servers;
 419         time_t NextPing;
 420         bool LastPingWasGood;
 421
 422  public:
 423
 424         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime)
 425                 : InspSocket(host, port, listening, maxtime)
 426         {
 427                 myhost = host;
 428                 this->LinkState = LISTENER;
 429         }
 430
 431         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 432                 : InspSocket(host, port, listening, maxtime)
 433         {
 434                 myhost = ServerName;
 435                 this->LinkState = CONNECTING;
 436         }
 437
 438         TreeSocket(int newfd, char* ip)
 439                 : InspSocket(newfd, ip)
 440         {
 441                 this->LinkState = WAIT_AUTH_1;
 442         }
 443
 444         virtual bool OnConnected()
 445         {
 446                 if (this->LinkState == CONNECTING)
 447                 {
 448                         Srv->SendOpers("*** Connection to "+myhost+"["+this->GetIP()+"] established.");
 449                         // we should send our details here.
 450                         // if the other side is satisfied, they send theirs.
 451                         // we do not need to change state here.
 452                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 453                         {
 454                                 if (x->Name == this->myhost)
 455                                 {
 456                                         // found who we're supposed to be connecting to, send the neccessary gubbins.
 457                                         this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 458                                         return true;
 459                                 }
 460                         }
 461                 }
 462                 return true;
 463         }
 464
 465         virtual void OnError(InspSocketError e)
 466         {
 467         }
 468
 469         virtual int OnDisconnect()
 470         {
 471                 return true;
 472         }
 473
 474         // recursively send the server tree with distances as hops
 475         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 476         {
 477                 char command[1024];
 478                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 479                 {
 480                         TreeServer* recursive_server = Current->GetChild(q);
 481                         if (recursive_server != s)
 482                         {
 483                                 // :source.server SERVER server.name hops :Description
 484                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 485                                 this->WriteLine(command);
 486                                 this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
 487                                 // down to next level
 488                                 this->SendServers(recursive_server, s, hops+1);
 489                         }
 490                 }
 491         }
 492
 493         void SquitServer(TreeServer* Current)
 494         {
 495                 // recursively squit the servers attached to 'Current'
 496                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 497                 {
 498                         TreeServer* recursive_server = Current->GetChild(q);
 499                         this->SquitServer(recursive_server);
 500                 }
 501                 // Now we've whacked the kids, whack self
 502                 num_lost_servers++;
 503                 bool quittingpeople = true;
 504                 while (quittingpeople)
 505                 {
 506                         quittingpeople = false;
 507                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 508                         {
 509                                 if (!strcasecmp(u->second->server,Current->GetName().c_str()))
 510                                 {
 511                                         Srv->QuitUser(u->second,Current->GetName()+" "+std::string(Srv->GetServerName()));
 512                                         num_lost_users++;
 513                                         quittingpeople = true;
 514                                         break;
 515                                 }
 516                         }
 517                 }
 518         }
 519
 520         void Squit(TreeServer* Current,std::string reason)
 521         {
 522                 if (Current)
 523                 {
 524                         std::deque<std::string> params;
 525                         params.push_back(Current->GetName());
 526                         params.push_back(":"+reason);
 527                         DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
 528                         if (Current->GetParent() == TreeRoot)
 529                         {
 530                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
 531                         }
 532                         else
 533                         {
 534                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
 535                         }
 536                         num_lost_servers = 0;
 537                         num_lost_users = 0;
 538                         SquitServer(Current);
 539                         Current->Tidy();
 540                         Current->GetParent()->DelChild(Current);
 541                         delete Current;
 542                         WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
 543                 }
 544                 else
 545                 {
 546                         log(DEFAULT,"Squit from unknown server");
 547                 }
 548         }
 549
 550         bool ForceMode(std::string source, std::deque<std::string> params)
 551         {
 552                 userrec* who = new userrec;
 553                 who->fd = FD_MAGIC_NUMBER;
 554                 if (params.size() < 2)
 555                         return true;
 556                 char* modelist[255];
 557                 for (unsigned int q = 0; q < params.size(); q++)
 558                 {
 559                         modelist[q] = (char*)params[q].c_str();
 560                 }
 561                 Srv->SendMode(modelist,params.size(),who);
 562                 DoOneToAllButSender(source,"FMODE",params,source);
 563                 delete who;
 564                 return true;
 565         }
 566
 567         bool ForceTopic(std::string source, std::deque<std::string> params)
 568         {
 569                 // FTOPIC %s %lu %s :%s
 570                 if (params.size() != 4)
 571                         return true;
 572                 std::string channel = params[0];
 573                 time_t ts = atoi(params[1].c_str());
 574                 std::string setby = params[2];
 575                 std::string topic = params[3];
 576
 577                 chanrec* c = Srv->FindChannel(channel);
 578                 if (c)
 579                 {
 580                         if ((ts >= c->topicset) || (!*c->topic))
 581                         {
 582                                 std::string oldtopic = c->topic;
 583                                 strlcpy(c->topic,topic.c_str(),MAXTOPIC);
 584                                 strlcpy(c->setby,setby.c_str(),NICKMAX);
 585                                 c->topicset = ts;
 586                                 // if the topic text is the same as the current topic,
 587                                 // dont bother to send the TOPIC command out, just silently
 588                                 // update the set time and set nick.
 589                                 if (oldtopic != topic)
 590                                         WriteChannelWithServ((char*)source.c_str(), c, "TOPIC %s :%s", c->name, c->topic);
 591                         }
 592
 593                 }
 594
 595                 // all done, send it on its way
 596                 params[3] = ":" + params[3];
 597                 DoOneToAllButSender(source,"FTOPIC",params,source);
 598
 599                 return true;
 600         }
 601
 602         bool ForceJoin(std::string source, std::deque<std::string> params)
 603         {
 604                 if (params.size() < 3)
 605                         return true;
 606
 607                 char first[MAXBUF];
 608                 char modestring[MAXBUF];
 609                 char* mode_users[127];
 610                 mode_users[0] = first;
 611                 mode_users[1] = modestring;
 612                 strcpy(mode_users[1],"+");
 613                 unsigned int modectr = 2;
 614
 615                 userrec* who = NULL;
 616                 std::string channel = params[0];
 617                 time_t TS = atoi(params[1].c_str());
 618                 char* key = "";
 619
 620                 chanrec* chan = Srv->FindChannel(channel);
 621                 if (chan)
 622                 {
 623                         key = chan->key;
 624                 }
 625                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
 626
 627                 // default is a high value, which if we dont have this
 628                 // channel will let the other side apply their modes.
 629                 time_t ourTS = time(NULL)+600;
 630                 chanrec* us = Srv->FindChannel(channel);
 631                 if (us)
 632                 {
 633                         ourTS = us->age;
 634                 }
 635
 636                 log(DEBUG,"FJOIN detected, our TS=%lu, their TS=%lu",ourTS,TS);
 637
 638                 // do this first, so our mode reversals are correctly received by other servers
 639                 // if there is a TS collision.
 640                 DoOneToAllButSender(source,"FJOIN",params,source);
 641
 642                 for (unsigned int usernum = 2; usernum < params.size(); usernum++)
 643                 {
 644                         // process one channel at a time, applying modes.
 645                         char* usr = (char*)params[usernum].c_str();
 646                         char permissions = *usr;
 647                         switch (permissions)
 648                         {
 649                                 case '@':
 650                                         usr++;
 651                                         mode_users[modectr++] = usr;
 652                                         strlcat(modestring,"o",MAXBUF);
 653                                 break;
 654                                 case '%':
 655                                         usr++;
 656                                         mode_users[modectr++] = usr;
 657                                         strlcat(modestring,"h",MAXBUF);
 658                                 break;
 659                                 case '+':
 660                                         usr++;
 661                                         mode_users[modectr++] = usr;
 662                                         strlcat(modestring,"v",MAXBUF);
 663                                 break;
 664                         }
 665                         who = Srv->FindNick(usr);
 666                         if (who)
 667                         {
 668                                 Srv->JoinUserToChannel(who,channel,key);
 669                                 if (modectr >= (MAXMODES-1))
 670                                 {
 671                                         // theres a mode for this user. push them onto the mode queue, and flush it
 672                                         // if there are more than MAXMODES to go.
 673                                         if (ourTS >= TS)
 674                                         {
 675                                                 log(DEBUG,"Our our channel newer than theirs, accepting their modes");
 676                                                 Srv->SendMode(mode_users,modectr,who);
 677                                         }
 678                                         else
 679                                         {
 680                                                 log(DEBUG,"Their channel newer than ours, bouncing their modes");
 681                                                 // bouncy bouncy!
 682                                                 std::deque<std::string> params;
 683                                                 // modes are now being UNSET...
 684                                                 *mode_users[1] = '-';
 685                                                 for (unsigned int x = 0; x < modectr; x++)
 686                                                 {
 687                                                         params.push_back(mode_users[x]);
 688                                                 }
 689                                                 // tell everyone to bounce the modes. bad modes, bad!
 690                                                 DoOneToMany(Srv->GetServerName(),"FMODE",params);
 691                                         }
 692                                         strcpy(mode_users[1],"+");
 693                                         modectr = 2;
 694                                 }
 695                         }
 696                 }
 697                 // there werent enough modes built up to flush it during FJOIN,
 698                 // or, there are a number left over. flush them out.
 699                 if ((modectr > 2) && (who))
 700                 {
 701                         if (ourTS >= TS)
 702                         {
 703                                 log(DEBUG,"Our our channel newer than theirs, accepting their modes");
 704                                 Srv->SendMode(mode_users,modectr,who);
 705                         }
 706                         else
 707                         {
 708                                 log(DEBUG,"Their channel newer than ours, bouncing their modes");
 709                                 std::deque<std::string> params;
 710                                 *mode_users[1] = '-';
 711                                 for (unsigned int x = 0; x < modectr; x++)
 712                                 {
 713                                         params.push_back(mode_users[x]);
 714                                 }
 715                                 DoOneToMany(Srv->GetServerName(),"FMODE",params);
 716                         }
 717                 }
 718                 return true;
 719         }
 720
 721         bool IntroduceClient(std::string source, std::deque<std::string> params)
 722         {
 723                 if (params.size() < 8)
 724                         return true;
 725                 // NICK age nick host dhost ident +modes ip :gecos
 726                 //       0   1    2    3      4     5    6   7
 727                 std::string nick = params[1];
 728                 std::string host = params[2];
 729                 std::string dhost = params[3];
 730                 std::string ident = params[4];
 731                 time_t age = atoi(params[0].c_str());
 732                 std::string modes = params[5];
 733                 while (*(modes.c_str()) == '+')
 734                 {
 735                         char* m = (char*)modes.c_str();
 736                         m++;
 737                         modes = m;
 738                 }
 739                 std::string ip = params[6];
 740                 std::string gecos = params[7];
 741                 char* tempnick = (char*)nick.c_str();
 742                 log(DEBUG,"Introduce client %s!%s@%s",tempnick,ident.c_str(),host.c_str());
 743
 744                 user_hash::iterator iter;
 745                 iter = clientlist.find(tempnick);
 746                 if (iter != clientlist.end())
 747                 {
 748                         // nick collision
 749                         log(DEBUG,"Nick collision on %s!%s@%s: %lu %lu",tempnick,ident.c_str(),host.c_str(),(unsigned long)age,(unsigned long)iter->second->age);
 750                         this->WriteLine(":"+Srv->GetServerName()+" KILL "+tempnick+" :Nickname collision");
 751                         return true;
 752                 }
 753
 754                 clientlist[tempnick] = new userrec();
 755                 clientlist[tempnick]->fd = FD_MAGIC_NUMBER;
 756                 strlcpy(clientlist[tempnick]->nick, tempnick,NICKMAX);
 757                 strlcpy(clientlist[tempnick]->host, host.c_str(),160);
 758                 strlcpy(clientlist[tempnick]->dhost, dhost.c_str(),160);
 759                 clientlist[tempnick]->server = (char*)FindServerNamePtr(source.c_str());
 760                 strlcpy(clientlist[tempnick]->ident, ident.c_str(),IDENTMAX);
 761                 strlcpy(clientlist[tempnick]->fullname, gecos.c_str(),MAXGECOS);
 762                 clientlist[tempnick]->registered = 7;
 763                 clientlist[tempnick]->signon = age;
 764                 strlcpy(clientlist[tempnick]->modes, modes.c_str(),53);
 765                 strlcpy(clientlist[tempnick]->ip,ip.c_str(),16);
 766                 for (int i = 0; i < MAXCHANS; i++)
 767                 {
 768                         clientlist[tempnick]->chans[i].channel = NULL;
 769                         clientlist[tempnick]->chans[i].uc_modes = 0;
 770                 }
 771                 params[7] = ":" + params[7];
 772                 DoOneToAllButSender(source,"NICK",params,source);
 773                 return true;
 774         }
 775
 776         void SendFJoins(TreeServer* Current, chanrec* c)
 777         {
 778                 char list[MAXBUF];
 779                 snprintf(list,MAXBUF,":%s FJOIN %s %lu",Srv->GetServerName().c_str(),c->name,(unsigned long)c->age);
 780                 std::vector<char*> *ulist = c->GetUsers();
 781                 for (unsigned int i = 0; i < ulist->size(); i++)
 782                 {
 783                         char* o = (*ulist)[i];
 784                         userrec* otheruser = (userrec*)o;
 785                         strlcat(list," ",MAXBUF);
 786                         strlcat(list,cmode(otheruser,c),MAXBUF);
 787                         strlcat(list,otheruser->nick,MAXBUF);
 788                         if (strlen(list)>(480-NICKMAX))
 789                         {
 790                                 this->WriteLine(list);
 791                                 snprintf(list,MAXBUF,":%s FJOIN %s %lu",Srv->GetServerName().c_str(),c->name,(unsigned long)c->age);
 792                         }
 793                 }
 794                 if (list[strlen(list)-1] != ':')
 795                 {
 796                         this->WriteLine(list);
 797                 }
 798         }
 799
 800         void SendXLines(TreeServer* Current)
 801         {
 802                 char data[MAXBUF];
 803                 // for zlines and qlines, we should first check if theyre global...
 804                 for (std::vector<ZLine>::iterator i = zlines.begin(); i != zlines.end(); i++)
 805                 {
 806                         snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s",Srv->GetServerName().c_str(),i->ipaddr,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
 807                         this->WriteLine(data);
 808                 }
 809                 for (std::vector<QLine>::iterator i = qlines.begin(); i != qlines.end(); i++)
 810                 {
 811                         snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s",Srv->GetServerName().c_str(),i->nick,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
 812                         this->WriteLine(data);
 813                 }
 814                 for (std::vector<GLine>::iterator i = glines.begin(); i != glines.end(); i++)
 815                 {
 816                         snprintf(data,MAXBUF,":%s ADDLINE G %s %s %lu %lu :%s",Srv->GetServerName().c_str(),i->hostmask,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
 817                         this->WriteLine(data);
 818                 }
 819                 for (std::vector<ELine>::iterator i = elines.begin(); i != elines.end(); i++)
 820                 {
 821                         snprintf(data,MAXBUF,":%s ADDLINE E %s %s %lu %lu :%s",Srv->GetServerName().c_str(),i->hostmask,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
 822                         this->WriteLine(data);
 823                 }
 824         }
 825
 826         void SendChannelModes(TreeServer* Current)
 827         {
 828                 char data[MAXBUF];
 829                 for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 830                 {
 831                         SendFJoins(Current, c->second);
 832                         snprintf(data,MAXBUF,":%s FMODE %s +%s",Srv->GetServerName().c_str(),c->second->name,chanmodes(c->second));
 833                         this->WriteLine(data);
 834                         if (*c->second->topic)
 835                         {
 836                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",Srv->GetServerName().c_str(),c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
 837                                 this->WriteLine(data);
 838                         }
 839                         for (BanList::iterator b = c->second->bans.begin(); b != c->second->bans.end(); b++)
 840                         {
 841                                 snprintf(data,MAXBUF,":%s FMODE %s +b %s",Srv->GetServerName().c_str(),c->second->name,b->data);
 842                                 this->WriteLine(data);
 843                         }
 844                         FOREACH_MOD OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this);
 845                 }
 846         }
 847
 848         // send all users and their channels
 849         void SendUsers(TreeServer* Current)
 850         {
 851                 char data[MAXBUF];
 852                 for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 853                 {
 854                         if (u->second->registered == 7)
 855                         {
 856                                 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->modes,u->second->ip,u->second->fullname);
 857                                 this->WriteLine(data);
 858                                 if (strchr(u->second->modes,'o'))
 859                                 {
 860                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
 861                                 }
 862                                 //char* chl = chlist(u->second,u->second);
 863                                 //if (*chl)
 864                                 //{
 865                                 //      this->WriteLine(":"+std::string(u->second->nick)+" FJOIN "+std::string(chl));
 866                                 //}
 867                                 FOREACH_MOD OnSyncUser(u->second,(Module*)TreeProtocolModule,(void*)this);
 868                         }
 869                 }
 870         }
 871
 872         void DoBurst(TreeServer* s)
 873         {
 874                 Srv->SendOpers("*** Bursting to "+s->GetName()+".");
 875                 this->WriteLine("BURST");
 876                 // send our version string
 877                 this->WriteLine(":"+Srv->GetServerName()+" VERSION :"+GetVersionString());
 878                 // Send server tree
 879                 this->SendServers(TreeRoot,s,1);
 880                 // Send users and their channels
 881                 this->SendUsers(s);
 882                 // Send everything else (channel modes etc)
 883                 this->SendChannelModes(s);
 884                 this->SendXLines(s);
 885                 this->WriteLine("ENDBURST");
 886         }
 887
 888         virtual bool OnDataReady()
 889         {
 890                 char* data = this->Read();
 891                 if (data)
 892                 {
 893                         this->in_buffer += data;
 894                         while (in_buffer.find("\n") != std::string::npos)
 895                         {
 896                                 char* line = (char*)in_buffer.c_str();
 897                                 std::string ret = "";
 898                                 while ((*line != '\n') && (strlen(line)))
 899                                 {
 900                                         ret = ret + *line;
 901                                         line++;
 902                                 }
 903                                 if ((*line == '\n') || (*line == '\r'))
 904                                         line++;
 905                                 in_buffer = line;
 906                                 if (!this->ProcessLine(ret))
 907                                 {
 908                                         return false;
 909                                 }
 910                         }
 911                 }
 912                 return (data != NULL);
 913         }
 914
 915         int WriteLine(std::string line)
 916         {
 917                 return this->Write(line + "\r\n");
 918         }
 919
 920         bool Error(std::deque<std::string> params)
 921         {
 922                 if (params.size() < 1)
 923                         return false;
 924                 std::string Errmsg = params[0];
 925                 std::string SName = myhost;
 926                 if (InboundServerName != "")
 927                 {
 928                         SName = InboundServerName;
 929                 }
 930                 Srv->SendOpers("*** ERROR from "+SName+": "+Errmsg);
 931                 // we will return false to cause the socket to close.
 932                 return false;
 933         }
 934
 935         bool OperType(std::string prefix, std::deque<std::string> params)
 936         {
 937                 if (params.size() != 1)
 938                         return true;
 939                 std::string opertype = params[0];
 940                 userrec* u = Srv->FindNick(prefix);
 941                 if (u)
 942                 {
 943                         strlcpy(u->oper,opertype.c_str(),NICKMAX);
 944                         if (!strchr(u->modes,'o'))
 945                         {
 946                                 strcat(u->modes,"o");
 947                         }
 948                         DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
 949                 }
 950                 return true;
 951         }
 952
 953         bool ForceNick(std::string prefix, std::deque<std::string> params)
 954         {
 955                 if (params.size() < 3)
 956                         return true;
 957                 userrec* u = Srv->FindNick(params[0]);
 958                 if (u)
 959                 {
 960                         Srv->ChangeUserNick(u,params[1]);
 961                         u->age = atoi(params[2]);
 962                         DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
 963                 }
 964                 return true;
 965         }
 966
 967         bool ServiceJoin(std::string prefix, std::deque<std::string> params)
 968         {
 969                 if (params.size() < 2)
 970                         return true;
 971                 userrec* u = Srv->FindNick(params[0]);
 972                 if (u)
 973                 {
 974                         Srv->JoinUserToChannel(u,params[1],"");
 975                         DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
 976                 }
 977                 return true;
 978         }
 979
 980         bool RemoteRehash(std::string prefix, std::deque<std::string> params)
 981         {
 982                 if (params.size() < 1)
 983                         return true;
 984                 std::string servermask = params[0];
 985                 if (Srv->MatchText(Srv->GetServerName(),servermask))
 986                 {
 987                         Srv->SendOpers("*** Remote rehash initiated from server \002"+prefix+"\002.");
 988                         Srv->RehashServer();
 989                         ReadConfiguration(false);
 990                 }
 991                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
 992                 return true;
 993         }
 994
 995         bool RemoteKill(std::string prefix, std::deque<std::string> params)
 996         {
 997                 if (params.size() != 2)
 998                         return true;
 999                 std::string nick = params[0];
1000                 std::string reason = params[1];
1001                 userrec* u = Srv->FindNick(prefix);
1002                 userrec* who = Srv->FindNick(nick);
1003                 if (who)
1004                 {
1005                         std::string sourceserv = prefix;
1006                         if (u)
1007                         {
1008                                 sourceserv = u->server;
1009                         }
1010                         params[1] = ":" + params[1];
1011                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
1012                         Srv->QuitUser(who,reason);
1013                 }
1014                 return true;
1015         }
1016
1017         bool LocalPong(std::string prefix, std::deque<std::string> params)
1018         {
1019                 if (params.size() < 1)
1020                         return true;
1021                 TreeServer* ServerSource = FindServer(prefix);
1022                 if (ServerSource)
1023                 {
1024                         ServerSource->SetPingFlag();
1025                 }
1026                 return true;
1027         }
1028
1029         bool ServerVersion(std::string prefix, std::deque<std::string> params)
1030         {
1031                 if (params.size() < 1)
1032                         return true;
1033                 TreeServer* ServerSource = FindServer(prefix);
1034                 if (ServerSource)
1035                 {
1036                         ServerSource->SetVersion(params[0]);
1037                 }
1038                 params[0] = ":" + params[0];
1039                 DoOneToAllButSender(prefix,"VERSION",params,prefix);
1040                 return true;
1041         }
1042
1043         bool ChangeHost(std::string prefix, std::deque<std::string> params)
1044         {
1045                 if (params.size() < 1)
1046                         return true;
1047                 userrec* u = Srv->FindNick(prefix);
1048                 if (u)
1049                 {
1050                         Srv->ChangeHost(u,params[0]);
1051                         DoOneToAllButSender(prefix,"FHOST",params,u->server);
1052                 }
1053                 return true;
1054         }
1055
1056         bool AddLine(std::string prefix, std::deque<std::string> params)
1057         {
1058                 if (params.size() < 6)
1059                         return true;
1060                 std::string linetype = params[0]; /* Z, Q, E, G, K */
1061                 std::string mask = params[1]; /* Line type dependent */
1062                 std::string source = params[2]; /* may not be online or may be a server */
1063                 std::string settime = params[3]; /* EPOCH time set */
1064                 std::string duration = params[4]; /* Duration secs */
1065                 std::string reason = params[5];
1066
1067                 switch (*(linetype.c_str()))
1068                 {
1069                         case 'Z':
1070                                 add_zline(atoi(duration.c_str()), source.c_str(), reason.c_str(), mask.c_str());
1071                         break;
1072                         case 'Q':
1073                                 add_qline(atoi(duration.c_str()), source.c_str(), reason.c_str(), mask.c_str());
1074                         break;
1075                         case 'E':
1076                                 add_eline(atoi(duration.c_str()), source.c_str(), reason.c_str(), mask.c_str());
1077                         break;
1078                         case 'G':
1079                                 add_gline(atoi(duration.c_str()), source.c_str(), reason.c_str(), mask.c_str());
1080                         break;
1081                         case 'K':
1082                                 add_kline(atoi(duration.c_str()), source.c_str(), reason.c_str(), mask.c_str());
1083                         break;
1084                         default:
1085                                 /* Just in case... */
1086                                 Srv->SendOpers("*** \2WARNING\2: Invalid xline type '"+linetype+"' sent by server "+prefix+", ignored!");
1087                         break;
1088                 }
1089                 /* Send it on its way */
1090                 params[5] = ":" + params[5];
1091                 DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
1092                 return true;
1093         }
1094
1095         bool ChangeName(std::string prefix, std::deque<std::string> params)
1096         {
1097                 if (params.size() < 1)
1098                         return true;
1099                 userrec* u = Srv->FindNick(prefix);
1100                 if (u)
1101                 {
1102                         Srv->ChangeGECOS(u,params[0]);
1103                         params[0] = ":" + params[0];
1104                         DoOneToAllButSender(prefix,"FNAME",params,u->server);
1105                 }
1106                 return true;
1107         }
1108
1109         bool LocalPing(std::string prefix, std::deque<std::string> params)
1110         {
1111                 if (params.size() < 1)
1112                         return true;
1113                 std::string stufftobounce = params[0];
1114                 this->WriteLine(":"+Srv->GetServerName()+" PONG "+stufftobounce);
1115                 return true;
1116         }
1117
1118         bool RemoteServer(std::string prefix, std::deque<std::string> params)
1119         {
1120                 if (params.size() < 4)
1121                         return false;
1122                 std::string servername = params[0];
1123                 std::string password = params[1];
1124                 // hopcount is not used for a remote server, we calculate this ourselves
1125                 std::string description = params[3];
1126                 TreeServer* ParentOfThis = FindServer(prefix);
1127                 if (!ParentOfThis)
1128                 {
1129                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
1130                         return false;
1131                 }
1132                 TreeServer* CheckDupe = FindServer(servername);
1133                 if (CheckDupe)
1134                 {
1135                         this->WriteLine("ERROR :Server "+servername+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
1136                         return false;
1137                 }
1138                 TreeServer* Node = new TreeServer(servername,description,ParentOfThis,NULL);
1139                 ParentOfThis->AddChild(Node);
1140                 params[3] = ":" + params[3];
1141                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
1142                 Srv->SendOpers("*** Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
1143                 return true;
1144         }
1145
1146         bool Outbound_Reply_Server(std::deque<std::string> params)
1147         {
1148                 if (params.size() < 4)
1149                         return false;
1150                 std::string servername = params[0];
1151                 std::string password = params[1];
1152                 int hops = atoi(params[2].c_str());
1153                 if (hops)
1154                 {
1155                         this->WriteLine("ERROR :Server too far away for authentication");
1156                         return false;
1157                 }
1158                 std::string description = params[3];
1159                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
1160                 {
1161                         if ((x->Name == servername) && (x->RecvPass == password))
1162                         {
1163                                 TreeServer* CheckDupe = FindServer(servername);
1164                                 if (CheckDupe)
1165                                 {
1166                                         this->WriteLine("ERROR :Server "+servername+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
1167                                         return false;
1168                                 }
1169                                 // Begin the sync here. this kickstarts the
1170                                 // other side, waiting in WAIT_AUTH_2 state,
1171                                 // into starting their burst, as it shows
1172                                 // that we're happy.
1173                                 this->LinkState = CONNECTED;
1174                                 // we should add the details of this server now
1175                                 // to the servers tree, as a child of the root
1176                                 // node.
1177                                 TreeServer* Node = new TreeServer(servername,description,TreeRoot,this);
1178                                 TreeRoot->AddChild(Node);
1179                                 params[3] = ":" + params[3];
1180                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,servername);
1181                                 this->DoBurst(Node);
1182                                 return true;
1183                         }
1184                 }
1185                 this->WriteLine("ERROR :Invalid credentials");
1186                 return false;
1187         }
1188
1189         bool Inbound_Server(std::deque<std::string> params)
1190         {
1191                 if (params.size() < 4)
1192                         return false;
1193                 std::string servername = params[0];
1194                 std::string password = params[1];
1195                 int hops = atoi(params[2].c_str());
1196                 if (hops)
1197                 {
1198                         this->WriteLine("ERROR :Server too far away for authentication");
1199                         return false;
1200                 }
1201                 std::string description = params[3];
1202                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
1203                 {
1204                         if ((x->Name == servername) && (x->RecvPass == password))
1205                         {
1206                                 TreeServer* CheckDupe = FindServer(servername);
1207                                 if (CheckDupe)
1208                                 {
1209                                         this->WriteLine("ERROR :Server "+servername+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
1210                                         return false;
1211                                 }
1212                                 Srv->SendOpers("*** Verified incoming server connection from \002"+servername+"\002["+this->GetIP()+"] ("+description+")");
1213                                 this->InboundServerName = servername;
1214                                 this->InboundDescription = description;
1215                                 // this is good. Send our details: Our server name and description and hopcount of 0,
1216                                 // along with the sendpass from this block.
1217                                 this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
1218                                 // move to the next state, we are now waiting for THEM.
1219                                 this->LinkState = WAIT_AUTH_2;
1220                                 return true;
1221                         }
1222                 }
1223                 this->WriteLine("ERROR :Invalid credentials");
1224                 return false;
1225         }
1226
1227         std::deque<std::string> Split(std::string line, bool stripcolon)
1228         {
1229                 std::deque<std::string> n;
1230                 if (!strchr(line.c_str(),' '))
1231                 {
1232                         n.push_back(line);
1233                         return n;
1234                 }
1235                 std::stringstream s(line);
1236                 std::string param = "";
1237                 n.clear();
1238                 int item = 0;
1239                 while (!s.eof())
1240                 {
1241                         char c;
1242                         s.get(c);
1243                         if (c == ' ')
1244                         {
1245                                 n.push_back(param);
1246                                 param = "";
1247                                 item++;
1248                         }
1249                         else
1250                         {
1251                                 if (!s.eof())
1252                                 {
1253                                         param = param + c;
1254                                 }
1255                                 if ((param == ":") && (item > 0))
1256                                 {
1257                                         param = "";
1258                                         while (!s.eof())
1259                                         {
1260                                                 s.get(c);
1261                                                 if (!s.eof())
1262                                                 {
1263                                                         param = param + c;
1264                                                 }
1265                                         }
1266                                         n.push_back(param);
1267                                         param = "";
1268                                 }
1269                         }
1270                 }
1271                 if (param != "")
1272                 {
1273                         n.push_back(param);
1274                 }
1275                 return n;
1276         }
1277
1278         bool ProcessLine(std::string line)
1279         {
1280                 char* l = (char*)line.c_str();
1281                 while ((strlen(l)) && (l[strlen(l)-1] == '\r') || (l[strlen(l)-1] == '\n'))
1282                         l[strlen(l)-1] = '\0';
1283                 line = l;
1284                 if (line == "")
1285                         return true;
1286                 Srv->Log(DEBUG,"IN: '"+line+"'");
1287                 std::deque<std::string> params = this->Split(line,true);
1288                 std::string command = "";
1289                 std::string prefix = "";
1290                 if (((params[0].c_str())[0] == ':') && (params.size() > 1))
1291                 {
1292                         prefix = params[0];
1293                         command = params[1];
1294                         char* pref = (char*)prefix.c_str();
1295                         prefix = ++pref;
1296                         params.pop_front();
1297                         params.pop_front();
1298                 }
1299                 else
1300                 {
1301                         prefix = "";
1302                         command = params[0];
1303                         params.pop_front();
1304                 }
1305
1306                 switch (this->LinkState)
1307                 {
1308                         TreeServer* Node;
1309
1310                         case WAIT_AUTH_1:
1311                                 // Waiting for SERVER command from remote server. Server initiating
1312                                 // the connection sends the first SERVER command, listening server
1313                                 // replies with theirs if its happy, then if the initiator is happy,
1314                                 // it starts to send its net sync, which starts the merge, otherwise
1315                                 // it sends an ERROR.
1316                                 if (command == "SERVER")
1317                                 {
1318                                         return this->Inbound_Server(params);
1319                                 }
1320                                 else if (command == "ERROR")
1321                                 {
1322                                         return this->Error(params);
1323                                 }
1324                         break;
1325                         case WAIT_AUTH_2:
1326                                 // Waiting for start of other side's netmerge to say they liked our
1327                                 // password.
1328                                 if (command == "SERVER")
1329                                 {
1330                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
1331                                         // silently ignore.
1332                                         return true;
1333                                 }
1334                                 else if (command == "BURST")
1335                                 {
1336                                         this->LinkState = CONNECTED;
1337                                         Node = new TreeServer(InboundServerName,InboundDescription,TreeRoot,this);
1338                                         TreeRoot->AddChild(Node);
1339                                         params.clear();
1340                                         params.push_back(InboundServerName);
1341                                         params.push_back("*");
1342                                         params.push_back("1");
1343                                         params.push_back(":"+InboundDescription);
1344                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
1345                                         this->DoBurst(Node);
1346                                 }
1347                                 else if (command == "ERROR")
1348                                 {
1349                                         return this->Error(params);
1350                                 }
1351
1352                         break;
1353                         case LISTENER:
1354                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
1355                                 return false;
1356                         break;
1357                         case CONNECTING:
1358                                 if (command == "SERVER")
1359                                 {
1360                                         // another server we connected to, which was in WAIT_AUTH_1 state,
1361                                         // has just sent us their credentials. If we get this far, theyre
1362                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
1363                                         // if we're happy with this, we should send our netburst which
1364                                         // kickstarts the merge.
1365                                         return this->Outbound_Reply_Server(params);
1366                                 }
1367                                 else if (command == "ERROR")
1368                                 {
1369                                         return this->Error(params);
1370                                 }
1371                         break;
1372                         case CONNECTED:
1373                                 // This is the 'authenticated' state, when all passwords
1374                                 // have been exchanged and anything past this point is taken
1375                                 // as gospel.
1376                                 std::string target = "";
1377                                 if ((command == "NICK") && (params.size() > 1))
1378                                 {
1379                                         return this->IntroduceClient(prefix,params);
1380                                 }
1381                                 else if (command == "FJOIN")
1382                                 {
1383                                         return this->ForceJoin(prefix,params);
1384                                 }
1385                                 else if (command == "SERVER")
1386                                 {
1387                                         return this->RemoteServer(prefix,params);
1388                                 }
1389                                 else if (command == "ERROR")
1390                                 {
1391                                         return this->Error(params);
1392                                 }
1393                                 else if (command == "OPERTYPE")
1394                                 {
1395                                         return this->OperType(prefix,params);
1396                                 }
1397                                 else if (command == "FMODE")
1398                                 {
1399                                         return this->ForceMode(prefix,params);
1400                                 }
1401                                 else if (command == "KILL")
1402                                 {
1403                                         return this->RemoteKill(prefix,params);
1404                                 }
1405                                 else if (command == "FTOPIC")
1406                                 {
1407                                         return this->ForceTopic(prefix,params);
1408                                 }
1409                                 else if (command == "REHASH")
1410                                 {
1411                                         return this->RemoteRehash(prefix,params);
1412                                 }
1413                                 else if (command == "PING")
1414                                 {
1415                                         return this->LocalPing(prefix,params);
1416                                 }
1417                                 else if (command == "PONG")
1418                                 {
1419                                         return this->LocalPong(prefix,params);
1420                                 }
1421                                 else if (command == "VERSION")
1422                                 {
1423                                         return this->ServerVersion(prefix,params);
1424                                 }
1425                                 else if (command == "FHOST")
1426                                 {
1427                                         return this->ChangeHost(prefix,params);
1428                                 }
1429                                 else if (command == "FNAME")
1430                                 {
1431                                         return this->ChangeName(prefix,params);
1432                                 }
1433                                 else if (command == "ADDLINE")
1434                                 {
1435                                         return this->AddLine(prefix,params);
1436                                 }
1437                                 else if (command == "SVSNICK")
1438                                 {
1439                                         if (prefix == "")
1440                                         {
1441                                                 prefix = this->GetName();
1442                                         }
1443                                         return this->ForceNick(prefix,params);
1444                                 }
1445                                 else if (command == "SVSJOIN")
1446                                 {
1447                                         if (prefix == "")
1448                                         {
1449                                                 prefix = this->GetName();
1450                                         }
1451                                         return this->ServiceJoin(prefix,params);
1452                                 }
1453                                 else if (command == "SQUIT")
1454                                 {
1455                                         if (params.size() == 2)
1456                                         {
1457                                                 this->Squit(FindServer(params[0]),params[1]);
1458                                         }
1459                                         return true;
1460                                 }
1461                                 else
1462                                 {
1463                                         // not a special inter-server command.
1464                                         // Emulate the actual user doing the command,
1465                                         // this saves us having a huge ugly parser.
1466                                         userrec* who = Srv->FindNick(prefix);
1467                                         std::string sourceserv = this->myhost;
1468                                         if (this->InboundServerName != "")
1469                                         {
1470                                                 sourceserv = this->InboundServerName;
1471                                         }
1472                                         if (who)
1473                                         {
1474                                                 // its a user
1475                                                 target = who->server;
1476                                                 char* strparams[127];
1477                                                 for (unsigned int q = 0; q < params.size(); q++)
1478                                                 {
1479                                                         strparams[q] = (char*)params[q].c_str();
1480                                                 }
1481                                                 Srv->CallCommandHandler(command, strparams, params.size(), who);
1482                                         }
1483                                         else
1484                                         {
1485                                                 // its not a user. Its either a server, or somethings screwed up.
1486                                                 if (IsServer(prefix))
1487                                                 {
1488                                                         target = Srv->GetServerName();
1489                                                 }
1490                                                 else
1491                                                 {
1492                                                         log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
1493                                                         return true;
1494                                                 }
1495                                         }
1496                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1497
1498                                 }
1499                                 return true;
1500                         break;
1501                 }
1502                 return true;
1503         }
1504
1505         virtual std::string GetName()
1506         {
1507                 std::string sourceserv = this->myhost;
1508                 if (this->InboundServerName != "")
1509                 {
1510                         sourceserv = this->InboundServerName;
1511                 }
1512                 return sourceserv;
1513         }
1514
1515         virtual void OnTimeout()
1516         {
1517                 if (this->LinkState == CONNECTING)
1518                 {
1519                         Srv->SendOpers("*** CONNECT: Connection to \002"+myhost+"\002 timed out.");
1520                 }
1521         }
1522
1523         virtual void OnClose()
1524         {
1525                 // Connection closed.
1526                 // If the connection is fully up (state CONNECTED)
1527                 // then propogate a netsplit to all peers.
1528                 std::string quitserver = this->myhost;
1529                 if (this->InboundServerName != "")
1530                 {
1531                         quitserver = this->InboundServerName;
1532                 }
1533                 TreeServer* s = FindServer(quitserver);
1534                 if (s)
1535                 {
1536                         Squit(s,"Remote host closed the connection");
1537                 }
1538         }
1539
1540         virtual int OnIncomingConnection(int newsock, char* ip)
1541         {
1542                 TreeSocket* s = new TreeSocket(newsock, ip);
1543                 Srv->AddSocket(s);
1544                 return true;
1545         }
1546 };
1547
1548 void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
1549 {
1550         for (unsigned int c = 0; c < list.size(); c++)
1551         {
1552                 if (list[c] == server)
1553                 {
1554                         return;
1555                 }
1556         }
1557         list.push_back(server);
1558 }
1559
1560 // returns a list of DIRECT servernames for a specific channel
1561 void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
1562 {
1563         std::vector<char*> *ulist = c->GetUsers();
1564         unsigned int ucount = ulist->size();
1565         for (unsigned int i = 0; i < ucount; i++)
1566         {
1567                 char* o = (*ulist)[i];
1568                 userrec* otheruser = (userrec*)o;
1569                 if (std::string(otheruser->server) != Srv->GetServerName())
1570                 {
1571                         TreeServer* best = BestRouteTo(otheruser->server);
1572                         if (best)
1573                                 AddThisServer(best,list);
1574                 }
1575         }
1576         return;
1577 }
1578
1579 bool DoOneToAllButSenderRaw(std::string data,std::string omit,std::string prefix,std::string command,std::deque<std::string> params)
1580 {
1581         TreeServer* omitroute = BestRouteTo(omit);
1582         if ((command == "NOTICE") || (command == "PRIVMSG"))
1583         {
1584                 if ((params.size() >= 2) && (*(params[0].c_str()) != '$'))
1585                 {
1586                         if (*(params[0].c_str()) != '#')
1587                         {
1588                                 // special routing for private messages/notices
1589                                 userrec* d = Srv->FindNick(params[0]);
1590                                 if (d)
1591                                 {
1592                                         std::deque<std::string> par;
1593                                         par.push_back(params[0]);
1594                                         par.push_back(":"+params[1]);
1595                                         DoOneToOne(prefix,command,par,d->server);
1596                                         return true;
1597                                 }
1598                         }
1599                         else
1600                         {
1601                                 log(DEBUG,"Channel privmsg going to chan %s",params[0].c_str());
1602                                 chanrec* c = Srv->FindChannel(params[0]);
1603                                 if (c)
1604                                 {
1605                                         std::deque<TreeServer*> list;
1606                                         GetListOfServersForChannel(c,list);
1607                                         log(DEBUG,"Got a list of %d servers",list.size());
1608                                         unsigned int lsize = list.size();
1609                                         for (unsigned int i = 0; i < lsize; i++)
1610                                         {
1611                                                 TreeSocket* Sock = list[i]->GetSocket();
1612                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
1613                                                 {
1614                                                         log(DEBUG,"Writing privmsg to server %s",list[i]->GetName().c_str());
1615                                                         Sock->WriteLine(data);
1616                                                 }
1617                                         }
1618                                         return true;
1619                                 }
1620                         }
1621                 }
1622         }
1623         unsigned int items = TreeRoot->ChildCount();
1624         for (unsigned int x = 0; x < items; x++)
1625         {
1626                 TreeServer* Route = TreeRoot->GetChild(x);
1627                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
1628                 {
1629                         TreeSocket* Sock = Route->GetSocket();
1630                         Sock->WriteLine(data);
1631                 }
1632         }
1633         return true;
1634 }
1635
1636 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> params, std::string omit)
1637 {
1638         TreeServer* omitroute = BestRouteTo(omit);
1639         std::string FullLine = ":" + prefix + " " + command;
1640         unsigned int words = params.size();
1641         for (unsigned int x = 0; x < words; x++)
1642         {
1643                 FullLine = FullLine + " " + params[x];
1644         }
1645         unsigned int items = TreeRoot->ChildCount();
1646         for (unsigned int x = 0; x < items; x++)
1647         {
1648                 TreeServer* Route = TreeRoot->GetChild(x);
1649                 // Send the line IF:
1650                 // The route has a socket (its a direct connection)
1651                 // The route isnt the one to be omitted
1652                 // The route isnt the path to the one to be omitted
1653                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
1654                 {
1655                         TreeSocket* Sock = Route->GetSocket();
1656                         Sock->WriteLine(FullLine);
1657                 }
1658         }
1659         return true;
1660 }
1661
1662 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> params)
1663 {
1664         std::string FullLine = ":" + prefix + " " + command;
1665         unsigned int words = params.size();
1666         for (unsigned int x = 0; x < words; x++)
1667         {
1668                 FullLine = FullLine + " " + params[x];
1669         }
1670         unsigned int items = TreeRoot->ChildCount();
1671         for (unsigned int x = 0; x < items; x++)
1672         {
1673                 TreeServer* Route = TreeRoot->GetChild(x);
1674                 if (Route->GetSocket())
1675                 {
1676                         TreeSocket* Sock = Route->GetSocket();
1677                         Sock->WriteLine(FullLine);
1678                 }
1679         }
1680         return true;
1681 }
1682
1683 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> params, std::string target)
1684 {
1685         TreeServer* Route = BestRouteTo(target);
1686         if (Route)
1687         {
1688                 std::string FullLine = ":" + prefix + " " + command;
1689                 unsigned int words = params.size();
1690                 for (unsigned int x = 0; x < words; x++)
1691                 {
1692                         FullLine = FullLine + " " + params[x];
1693                 }
1694                 if (Route->GetSocket())
1695                 {
1696                         TreeSocket* Sock = Route->GetSocket();
1697                         Sock->WriteLine(FullLine);
1698                 }
1699                 return true;
1700         }
1701         else
1702         {
1703                 return true;
1704         }
1705 }
1706
1707 std::vector<TreeSocket*> Bindings;
1708
1709 void ReadConfiguration(bool rebind)
1710 {
1711         if (rebind)
1712         {
1713                 for (int j =0; j < Conf->Enumerate("bind"); j++)
1714                 {
1715                         std::string Type = Conf->ReadValue("bind","type",j);
1716                         std::string IP = Conf->ReadValue("bind","address",j);
1717                         long Port = Conf->ReadInteger("bind","port",j,true);
1718                         if (Type == "servers")
1719                         {
1720                                 if (IP == "*")
1721                                 {
1722                                         IP = "";
1723                                 }
1724                                 TreeSocket* listener = new TreeSocket(IP.c_str(),Port,true,10);
1725                                 if (listener->GetState() == I_LISTENING)
1726                                 {
1727                                         Srv->AddSocket(listener);
1728                                         Bindings.push_back(listener);
1729                                 }
1730                                 else
1731                                 {
1732                                         log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
1733                                         listener->Close();
1734                                         delete listener;
1735                                 }
1736                         }
1737                 }
1738         }
1739         LinkBlocks.clear();
1740         for (int j =0; j < Conf->Enumerate("link"); j++)
1741         {
1742                 Link L;
1743                 L.Name = Conf->ReadValue("link","name",j);
1744                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
1745                 L.Port = Conf->ReadInteger("link","port",j,true);
1746                 L.SendPass = Conf->ReadValue("link","sendpass",j);
1747                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
1748                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
1749                 L.NextConnectTime = time(NULL) + L.AutoConnect;
1750                 LinkBlocks.push_back(L);
1751                 log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
1752         }
1753 }
1754
1755
1756 class ModuleSpanningTree : public Module
1757 {
1758         std::vector<TreeSocket*> Bindings;
1759         int line;
1760         int NumServers;
1761
1762  public:
1763
1764         ModuleSpanningTree()
1765         {
1766                 Srv = new Server;
1767                 Conf = new ConfigReader;
1768                 Bindings.clear();
1769
1770                 // Create the root of the tree
1771                 TreeRoot = new TreeServer(Srv->GetServerName(),Srv->GetServerDescription());
1772
1773                 ReadConfiguration(true);
1774         }
1775
1776         void ShowLinks(TreeServer* Current, userrec* user, int hops)
1777         {
1778                 std::string Parent = TreeRoot->GetName();
1779                 if (Current->GetParent())
1780                 {
1781                         Parent = Current->GetParent()->GetName();
1782                 }
1783                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1784                 {
1785                         ShowLinks(Current->GetChild(q),user,hops+1);
1786                 }
1787                 WriteServ(user->fd,"364 %s %s %s :%d %s",user->nick,Current->GetName().c_str(),Parent.c_str(),hops,Current->GetDesc().c_str());
1788         }
1789
1790         int CountLocalServs()
1791         {
1792                 return TreeRoot->ChildCount();
1793         }
1794
1795         void CountServsRecursive(TreeServer* Current)
1796         {
1797                 NumServers++;
1798                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1799                 {
1800                         CountServsRecursive(Current->GetChild(q));
1801                 }
1802         }
1803
1804         int CountServs()
1805         {
1806                 NumServers = 0;
1807                 CountServsRecursive(TreeRoot);
1808                 return NumServers;
1809         }
1810
1811         void HandleLinks(char** parameters, int pcnt, userrec* user)
1812         {
1813                 ShowLinks(TreeRoot,user,0);
1814                 WriteServ(user->fd,"365 %s * :End of /LINKS list.",user->nick);
1815                 return;
1816         }
1817
1818         void HandleLusers(char** parameters, int pcnt, userrec* user)
1819         {
1820                 WriteServ(user->fd,"251 %s :There are %d users and %d invisible on %d servers",user->nick,usercnt()-usercount_invisible(),usercount_invisible(),this->CountServs());
1821                 WriteServ(user->fd,"252 %s %d :operator(s) online",user->nick,usercount_opers());
1822                 WriteServ(user->fd,"253 %s %d :unknown connections",user->nick,usercount_unknown());
1823                 WriteServ(user->fd,"254 %s %d :channels formed",user->nick,chancount());
1824                 WriteServ(user->fd,"254 %s :I have %d clients and %d servers",user->nick,local_count(),this->CountLocalServs());
1825                 return;
1826         }
1827
1828         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
1829
1830         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80])
1831         {
1832                 if (line < 128)
1833                 {
1834                         for (int t = 0; t < depth; t++)
1835                         {
1836                                 matrix[line][t] = ' ';
1837                         }
1838                         strlcpy(&matrix[line][depth],Current->GetName().c_str(),80);
1839                         line++;
1840                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
1841                         {
1842                                 ShowMap(Current->GetChild(q),user,depth+2,matrix);
1843                         }
1844                 }
1845         }
1846
1847         // Ok, prepare to be confused.
1848         // After much mulling over how to approach this, it struck me that
1849         // the 'usual' way of doing a /MAP isnt the best way. Instead of
1850         // keeping track of a ton of ascii characters, and line by line
1851         // under recursion working out where to place them using multiplications
1852         // and divisons, we instead render the map onto a backplane of characters
1853         // (a character matrix), then draw the branches as a series of "L" shapes
1854         // from the nodes. This is not only friendlier on CPU it uses less stack.
1855
1856         void HandleMap(char** parameters, int pcnt, userrec* user)
1857         {
1858                 // This array represents a virtual screen which we will
1859                 // "scratch" draw to, as the console device of an irc
1860                 // client does not provide for a proper terminal.
1861                 char matrix[128][80];
1862                 for (unsigned int t = 0; t < 128; t++)
1863                 {
1864                         matrix[t][0] = '\0';
1865                 }
1866                 line = 0;
1867                 // The only recursive bit is called here.
1868                 ShowMap(TreeRoot,user,0,matrix);
1869                 // Process each line one by one. The algorithm has a limit of
1870                 // 128 servers (which is far more than a spanning tree should have
1871                 // anyway, so we're ok). This limit can be raised simply by making
1872                 // the character matrix deeper, 128 rows taking 10k of memory.
1873                 for (int l = 1; l < line; l++)
1874                 {
1875                         // scan across the line looking for the start of the
1876                         // servername (the recursive part of the algorithm has placed
1877                         // the servers at indented positions depending on what they
1878                         // are related to)
1879                         int first_nonspace = 0;
1880                         while (matrix[l][first_nonspace] == ' ')
1881                         {
1882                                 first_nonspace++;
1883                         }
1884                         first_nonspace--;
1885                         // Draw the `- (corner) section: this may be overwritten by
1886                         // another L shape passing along the same vertical pane, becoming
1887                         // a |- (branch) section instead.
1888                         matrix[l][first_nonspace] = '-';
1889                         matrix[l][first_nonspace-1] = '`';
1890                         int l2 = l - 1;
1891                         // Draw upwards until we hit the parent server, causing possibly
1892                         // other corners (`-) to become branches (|-)
1893                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
1894                         {
1895                                 matrix[l2][first_nonspace-1] = '|';
1896                                 l2--;
1897                         }
1898                 }
1899                 // dump the whole lot to the user. This is the easy bit, honest.
1900                 for (int t = 0; t < line; t++)
1901                 {
1902                         WriteServ(user->fd,"006 %s :%s",user->nick,&matrix[t][0]);
1903                 }
1904                 WriteServ(user->fd,"007 %s :End of /MAP",user->nick);
1905                 return;
1906         }
1907
1908         int HandleSquit(char** parameters, int pcnt, userrec* user)
1909         {
1910                 TreeServer* s = FindServerMask(parameters[0]);
1911                 if (s)
1912                 {
1913                         TreeSocket* sock = s->GetSocket();
1914                         if (sock)
1915                         {
1916                                 WriteOpers("*** SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
1917                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
1918                                 sock->Close();
1919                         }
1920                         else
1921                         {
1922                                 WriteServ(user->fd,"NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
1923                         }
1924                 }
1925                 else
1926                 {
1927                          WriteServ(user->fd,"NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
1928                 }
1929                 return 1;
1930         }
1931
1932         void DoPingChecks(time_t curtime)
1933         {
1934                 for (unsigned int j = 0; j < TreeRoot->ChildCount(); j++)
1935                 {
1936                         TreeServer* serv = TreeRoot->GetChild(j);
1937                         TreeSocket* sock = serv->GetSocket();
1938                         if (sock)
1939                         {
1940                                 if (curtime >= serv->NextPingTime())
1941                                 {
1942                                         if (serv->AnsweredLastPing())
1943                                         {
1944                                                 sock->WriteLine(":"+Srv->GetServerName()+" PING "+serv->GetName());
1945                                                 serv->SetNextPingTime(curtime + 60);
1946                                         }
1947                                         else
1948                                         {
1949                                                 // they didnt answer, boot them
1950                                                 WriteOpers("*** Server \002%s\002 pinged out",serv->GetName().c_str());
1951                                                 sock->Squit(serv,"Ping timeout");
1952                                                 sock->Close();
1953                                                 return;
1954                                         }
1955                                 }
1956                         }
1957                 }
1958         }
1959
1960         void AutoConnectServers(time_t curtime)
1961         {
1962                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
1963                 {
1964                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
1965                         {
1966                                 log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
1967                                 x->NextConnectTime = curtime + x->AutoConnect;
1968                                 TreeServer* CheckDupe = FindServer(x->Name);
1969                                 if (!CheckDupe)
1970                                 {
1971                                         // an autoconnected server is not connected. Check if its time to connect it
1972                                         WriteOpers("*** AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
1973                                         TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name);
1974                                         Srv->AddSocket(newsocket);
1975                                 }
1976                         }
1977                 }
1978         }
1979
1980         int HandleVersion(char** parameters, int pcnt, userrec* user)
1981         {
1982                 // we've already checked if pcnt > 0, so this is safe
1983                 TreeServer* found = FindServerMask(parameters[0]);
1984                 if (found)
1985                 {
1986                         std::string Version = found->GetVersion();
1987                         WriteServ(user->fd,"351 %s :%s",user->nick,Version.c_str());
1988                 }
1989                 else
1990                 {
1991                         WriteServ(user->fd,"402 %s %s :No such server",user->nick,parameters[0]);
1992                 }
1993                 return 1;
1994         }
1995
1996         int HandleConnect(char** parameters, int pcnt, userrec* user)
1997         {
1998                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
1999                 {
2000                         if (Srv->MatchText(x->Name.c_str(),parameters[0]))
2001                         {
2002                                 TreeServer* CheckDupe = FindServer(x->Name);
2003                                 if (!CheckDupe)
2004                                 {
2005                                         WriteServ(user->fd,"NOTICE %s :*** CONNECT: Connecting to server: \002%s\002 (%s:%d)",user->nick,x->Name.c_str(),x->IPAddr.c_str(),x->Port);
2006                                         TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name);
2007                                         Srv->AddSocket(newsocket);
2008                                         return 1;
2009                                 }
2010                                 else
2011                                 {
2012                                         WriteServ(user->fd,"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());
2013                                         return 1;
2014                                 }
2015                         }
2016                 }
2017                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
2018                 return 1;
2019         }
2020
2021         virtual int OnPreCommand(std::string command, char **parameters, int pcnt, userrec *user)
2022         {
2023                 if (command == "CONNECT")
2024                 {
2025                         return this->HandleConnect(parameters,pcnt,user);
2026                 }
2027                 else if (command == "SQUIT")
2028                 {
2029                         return this->HandleSquit(parameters,pcnt,user);
2030                 }
2031                 else if (command == "MAP")
2032                 {
2033                         this->HandleMap(parameters,pcnt,user);
2034                         return 1;
2035                 }
2036                 else if (command == "LUSERS")
2037                 {
2038                         this->HandleLusers(parameters,pcnt,user);
2039                         return 1;
2040                 }
2041                 else if (command == "LINKS")
2042                 {
2043                         this->HandleLinks(parameters,pcnt,user);
2044                         return 1;
2045                 }
2046                 else if ((command == "VERSION") && (pcnt > 0))
2047                 {
2048                         this->HandleVersion(parameters,pcnt,user);
2049                         return 1;
2050                 }
2051                 else if (Srv->IsValidModuleCommand(command, pcnt, user))
2052                 {
2053                         // this bit of code cleverly routes all module commands
2054                         // to all remote severs *automatically* so that modules
2055                         // can just handle commands locally, without having
2056                         // to have any special provision in place for remote
2057                         // commands and linking protocols.
2058                         std::deque<std::string> params;
2059                         params.clear();
2060                         for (int j = 0; j < pcnt; j++)
2061                         {
2062                                 if (strchr(parameters[j],' '))
2063                                 {
2064                                         params.push_back(":" + std::string(parameters[j]));
2065                                 }
2066                                 else
2067                                 {
2068                                         params.push_back(std::string(parameters[j]));
2069                                 }
2070                         }
2071                         DoOneToMany(user->nick,command,params);
2072                 }
2073                 return 0;
2074         }
2075
2076         virtual void OnGetServerDescription(std::string servername,std::string &description)
2077         {
2078                 TreeServer* s = FindServer(servername);
2079                 if (s)
2080                 {
2081                         description = s->GetDesc();
2082                 }
2083         }
2084
2085         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
2086         {
2087                 if (std::string(source->server) == Srv->GetServerName())
2088                 {
2089                         std::deque<std::string> params;
2090                         params.push_back(dest->nick);
2091                         params.push_back(channel->name);
2092                         DoOneToMany(source->nick,"INVITE",params);
2093                 }
2094         }
2095
2096         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, std::string topic)
2097         {
2098                 std::deque<std::string> params;
2099                 params.push_back(chan->name);
2100                 params.push_back(":"+topic);
2101                 DoOneToMany(user->nick,"TOPIC",params);
2102         }
2103
2104         virtual void OnWallops(userrec* user, std::string text)
2105         {
2106                 if (std::string(user->server) == Srv->GetServerName())
2107                 {
2108                         std::deque<std::string> params;
2109                         params.push_back(":"+text);
2110                         DoOneToMany(user->nick,"WALLOPS",params);
2111                 }
2112         }
2113
2114         virtual void OnUserNotice(userrec* user, void* dest, int target_type, std::string text)
2115         {
2116                 if (target_type == TYPE_USER)
2117                 {
2118                         userrec* d = (userrec*)dest;
2119                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
2120                         {
2121                                 std::deque<std::string> params;
2122                                 params.clear();
2123                                 params.push_back(d->nick);
2124                                 params.push_back(":"+text);
2125                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
2126                         }
2127                 }
2128                 else
2129                 {
2130                         if (std::string(user->server) == Srv->GetServerName())
2131                         {
2132                                 chanrec *c = (chanrec*)dest;
2133                                 std::deque<TreeServer*> list;
2134                                 GetListOfServersForChannel(c,list);
2135                                 unsigned int ucount = list.size();
2136                                 for (unsigned int i = 0; i < ucount; i++)
2137                                 {
2138                                         TreeSocket* Sock = list[i]->GetSocket();
2139                                         if (Sock)
2140                                                 Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+std::string(c->name)+" :"+text);
2141                                 }
2142                         }
2143                 }
2144         }
2145
2146         virtual void OnUserMessage(userrec* user, void* dest, int target_type, std::string text)
2147         {
2148                 if (target_type == TYPE_USER)
2149                 {
2150                         // route private messages which are targetted at clients only to the server
2151                         // which needs to receive them
2152                         userrec* d = (userrec*)dest;
2153                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
2154                         {
2155                                 std::deque<std::string> params;
2156                                 params.clear();
2157                                 params.push_back(d->nick);
2158                                 params.push_back(":"+text);
2159                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
2160                         }
2161                 }
2162                 else
2163                 {
2164                         if (std::string(user->server) == Srv->GetServerName())
2165                         {
2166                                 chanrec *c = (chanrec*)dest;
2167                                 std::deque<TreeServer*> list;
2168                                 GetListOfServersForChannel(c,list);
2169                                 unsigned int ucount = list.size();
2170                                 for (unsigned int i = 0; i < ucount; i++)
2171                                 {
2172                                         TreeSocket* Sock = list[i]->GetSocket();
2173                                         if (Sock)
2174                                                 Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+std::string(c->name)+" :"+text);
2175                                 }
2176                         }
2177                 }
2178         }
2179
2180         virtual void OnBackgroundTimer(time_t curtime)
2181         {
2182                 AutoConnectServers(curtime);
2183                 DoPingChecks(curtime);
2184         }
2185
2186         virtual void OnUserJoin(userrec* user, chanrec* channel)
2187         {
2188                 // Only do this for local users
2189                 if (std::string(user->server) == Srv->GetServerName())
2190                 {
2191                         std::deque<std::string> params;
2192                         params.clear();
2193                         params.push_back(channel->name);
2194                         if (*channel->key)
2195                         {
2196                                 // if the channel has a key, force the join by emulating the key.
2197                                 params.push_back(channel->key);
2198                         }
2199                         if (channel->GetUserCounter() > 1)
2200                         {
2201                                 // not the first in the channel
2202                                 DoOneToMany(user->nick,"JOIN",params);
2203                         }
2204                         else
2205                         {
2206                                 // first in the channel, set up their permissions
2207                                 // and the channel TS with FJOIN.
2208                                 char ts[24];
2209                                 snprintf(ts,24,"%lu",(unsigned long)channel->age);
2210                                 params.clear();
2211                                 params.push_back(channel->name);
2212                                 params.push_back(ts);
2213                                 params.push_back("@"+std::string(user->nick));
2214                                 DoOneToMany(Srv->GetServerName(),"FJOIN",params);
2215                         }
2216                 }
2217         }
2218
2219         virtual void OnChangeHost(userrec* user, std::string newhost)
2220         {
2221                 // only occurs for local clients
2222                 std::deque<std::string> params;
2223                 params.push_back(newhost);
2224                 DoOneToMany(user->nick,"FHOST",params);
2225         }
2226
2227         virtual void OnChangeName(userrec* user, std::string gecos)
2228         {
2229                 // only occurs for local clients
2230                 std::deque<std::string> params;
2231                 params.push_back(gecos);
2232                 DoOneToMany(user->nick,"FNAME",params);
2233         }
2234
2235         virtual void OnUserPart(userrec* user, chanrec* channel)
2236         {
2237                 if (std::string(user->server) == Srv->GetServerName())
2238                 {
2239                         std::deque<std::string> params;
2240                         params.push_back(channel->name);
2241                         DoOneToMany(user->nick,"PART",params);
2242                 }
2243         }
2244
2245         virtual void OnUserConnect(userrec* user)
2246         {
2247                 char agestr[MAXBUF];
2248                 if (std::string(user->server) == Srv->GetServerName())
2249                 {
2250                         std::deque<std::string> params;
2251                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
2252                         params.push_back(agestr);
2253                         params.push_back(user->nick);
2254                         params.push_back(user->host);
2255                         params.push_back(user->dhost);
2256                         params.push_back(user->ident);
2257                         params.push_back("+"+std::string(user->modes));
2258                         params.push_back(user->ip);
2259                         params.push_back(":"+std::string(user->fullname));
2260                         DoOneToMany(Srv->GetServerName(),"NICK",params);
2261                 }
2262         }
2263
2264         virtual void OnUserQuit(userrec* user, std::string reason)
2265         {
2266                 if (std::string(user->server) == Srv->GetServerName())
2267                 {
2268                         std::deque<std::string> params;
2269                         params.push_back(":"+reason);
2270                         DoOneToMany(user->nick,"QUIT",params);
2271                 }
2272         }
2273
2274         virtual void OnUserPostNick(userrec* user, std::string oldnick)
2275         {
2276                 if (std::string(user->server) == Srv->GetServerName())
2277                 {
2278                         std::deque<std::string> params;
2279                         params.push_back(user->nick);
2280                         DoOneToMany(oldnick,"NICK",params);
2281                 }
2282         }
2283
2284         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, std::string reason)
2285         {
2286                 if (std::string(source->server) == Srv->GetServerName())
2287                 {
2288                         std::deque<std::string> params;
2289                         params.push_back(chan->name);
2290                         params.push_back(user->nick);
2291                         params.push_back(":"+reason);
2292                         DoOneToMany(source->nick,"KICK",params);
2293                 }
2294         }
2295
2296         virtual void OnRemoteKill(userrec* source, userrec* dest, std::string reason)
2297         {
2298                 std::deque<std::string> params;
2299                 params.push_back(dest->nick);
2300                 params.push_back(":"+reason);
2301                 DoOneToMany(source->nick,"KILL",params);
2302         }
2303
2304         virtual void OnRehash(std::string parameter)
2305         {
2306                 if (parameter != "")
2307                 {
2308                         std::deque<std::string> params;
2309                         params.push_back(parameter);
2310                         DoOneToMany(Srv->GetServerName(),"REHASH",params);
2311                         // check for self
2312                         if (Srv->MatchText(Srv->GetServerName(),parameter))
2313                         {
2314                                 Srv->SendOpers("*** Remote rehash initiated from server \002"+Srv->GetServerName()+"\002.");
2315                                 Srv->RehashServer();
2316                         }
2317                 }
2318                 ReadConfiguration(false);
2319         }
2320
2321         // note: the protocol does not allow direct umode +o except
2322         // via NICK with 8 params. sending OPERTYPE infers +o modechange
2323         // locally.
2324         virtual void OnOper(userrec* user, std::string opertype)
2325         {
2326                 if (std::string(user->server) == Srv->GetServerName())
2327                 {
2328                         std::deque<std::string> params;
2329                         params.push_back(opertype);
2330                         DoOneToMany(user->nick,"OPERTYPE",params);
2331                 }
2332         }
2333
2334         void OnLine(userrec* source, std::string host, bool adding, char linetype, long duration, std::string reason)
2335         {
2336                 if (std::string(source->server) == Srv->GetServerName())
2337                 {
2338                         char type[8];
2339                         snprintf(type,8,"%cLINE",linetype);
2340                         std::string stype = type;
2341                         if (adding)
2342                         {
2343                                 char sduration[MAXBUF];
2344                                 snprintf(sduration,MAXBUF,"%ld",duration);
2345                                 std::deque<std::string> params;
2346                                 params.push_back(host);
2347                                 params.push_back(sduration);
2348                                 params.push_back(":"+reason);
2349                                 DoOneToMany(source->nick,stype,params);
2350                         }
2351                         else
2352                         {
2353                                 std::deque<std::string> params;
2354                                 params.push_back(host);
2355                                 DoOneToMany(source->nick,stype,params);
2356                         }
2357                 }
2358         }
2359
2360         virtual void OnAddGLine(long duration, userrec* source, std::string reason, std::string hostmask)
2361         {
2362                 OnLine(source,hostmask,true,'G',duration,reason);
2363         }
2364
2365         virtual void OnAddZLine(long duration, userrec* source, std::string reason, std::string ipmask)
2366         {
2367                 OnLine(source,ipmask,true,'Z',duration,reason);
2368         }
2369
2370         virtual void OnAddQLine(long duration, userrec* source, std::string reason, std::string nickmask)
2371         {
2372                 OnLine(source,nickmask,true,'Q',duration,reason);
2373         }
2374
2375         virtual void OnAddELine(long duration, userrec* source, std::string reason, std::string hostmask)
2376         {
2377                 OnLine(source,hostmask,true,'E',duration,reason);
2378         }
2379
2380         virtual void OnDelGLine(userrec* source, std::string hostmask)
2381         {
2382                 OnLine(source,hostmask,false,'G',0,"");
2383         }
2384
2385         virtual void OnDelZLine(userrec* source, std::string ipmask)
2386         {
2387                 OnLine(source,ipmask,false,'Z',0,"");
2388         }
2389
2390         virtual void OnDelQLine(userrec* source, std::string nickmask)
2391         {
2392                 OnLine(source,nickmask,false,'Q',0,"");
2393         }
2394
2395         virtual void OnDelELine(userrec* source, std::string hostmask)
2396         {
2397                 OnLine(source,hostmask,false,'E',0,"");
2398         }
2399
2400         virtual void OnMode(userrec* user, void* dest, int target_type, std::string text)
2401         {
2402                 if (std::string(user->server) == Srv->GetServerName())
2403                 {
2404                         if (target_type == TYPE_USER)
2405                         {
2406                                 userrec* u = (userrec*)dest;
2407                                 std::deque<std::string> params;
2408                                 params.push_back(u->nick);
2409                                 params.push_back(text);
2410                                 DoOneToMany(user->nick,"MODE",params);
2411                         }
2412                         else
2413                         {
2414                                 chanrec* c = (chanrec*)dest;
2415                                 std::deque<std::string> params;
2416                                 params.push_back(c->name);
2417                                 params.push_back(text);
2418                                 DoOneToMany(user->nick,"MODE",params);
2419                         }
2420                 }
2421         }
2422
2423         virtual void ProtoSendMode(void* opaque, int target_type, void* target, std::string modeline)
2424         {
2425                 TreeSocket* s = (TreeSocket*)opaque;
2426                 if (target)
2427                 {
2428                         if (target_type == TYPE_USER)
2429                         {
2430                                 userrec* u = (userrec*)target;
2431                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+u->nick+" "+modeline);
2432                         }
2433                         else
2434                         {
2435                                 chanrec* c = (chanrec*)target;
2436                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+modeline);
2437                         }
2438                 }
2439         }
2440
2441         virtual ~ModuleSpanningTree()
2442         {
2443                 delete Srv;
2444         }
2445
2446         virtual Version GetVersion()
2447         {
2448                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
2449         }
2450 };
2451
2452
2453 class ModuleSpanningTreeFactory : public ModuleFactory
2454 {
2455  public:
2456         ModuleSpanningTreeFactory()
2457         {
2458         }
2459
2460         ~ModuleSpanningTreeFactory()
2461         {
2462         }
2463
2464         virtual Module * CreateModule()
2465         {
2466                 TreeProtocolModule = new ModuleSpanningTree;
2467                 return TreeProtocolModule;
2468         }
2469
2470 };
2471
2472
2473 extern "C" void * init_module( void )
2474 {
2475         return new ModuleSpanningTreeFactory;
2476 }