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                         DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
 962                 }
 963                 return true;
 964         }
 965
 966         bool ServiceJoin(std::string prefix, std::deque<std::string> params)
 967         {
 968                 if (params.size() < 2)
 969                         return true;
 970                 userrec* u = Srv->FindNick(params[0]);
 971                 if (u)
 972                 {
 973                         Srv->JoinUserToChannel(u,params[1],"");
 974                         DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
 975                 }
 976                 return true;
 977         }
 978
 979         bool RemoteRehash(std::string prefix, std::deque<std::string> params)
 980         {
 981                 if (params.size() < 1)
 982                         return true;
 983                 std::string servermask = params[0];
 984                 if (Srv->MatchText(Srv->GetServerName(),servermask))
 985                 {
 986                         Srv->SendOpers("*** Remote rehash initiated from server \002"+prefix+"\002.");
 987                         Srv->RehashServer();
 988                         ReadConfiguration(false);
 989                 }
 990                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
 991                 return true;
 992         }
 993
 994         bool RemoteKill(std::string prefix, std::deque<std::string> params)
 995         {
 996                 if (params.size() != 2)
 997                         return true;
 998                 std::string nick = params[0];
 999                 std::string reason = params[1];
1000                 userrec* u = Srv->FindNick(prefix);
1001                 userrec* who = Srv->FindNick(nick);
1002                 if (who)
1003                 {
1004                         std::string sourceserv = prefix;
1005                         if (u)
1006                         {
1007                                 sourceserv = u->server;
1008                         }
1009                         params[1] = ":" + params[1];
1010                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
1011                         Srv->QuitUser(who,reason);
1012                 }
1013                 return true;
1014         }
1015
1016         bool LocalPong(std::string prefix, std::deque<std::string> params)
1017         {
1018                 if (params.size() < 1)
1019                         return true;
1020                 TreeServer* ServerSource = FindServer(prefix);
1021                 if (ServerSource)
1022                 {
1023                         ServerSource->SetPingFlag();
1024                 }
1025                 return true;
1026         }
1027
1028         bool ServerVersion(std::string prefix, std::deque<std::string> params)
1029         {
1030                 if (params.size() < 1)
1031                         return true;
1032                 TreeServer* ServerSource = FindServer(prefix);
1033                 if (ServerSource)
1034                 {
1035                         ServerSource->SetVersion(params[0]);
1036                 }
1037                 params[0] = ":" + params[0];
1038                 DoOneToAllButSender(prefix,"VERSION",params,prefix);
1039                 return true;
1040         }
1041
1042         bool ChangeHost(std::string prefix, std::deque<std::string> params)
1043         {
1044                 if (params.size() < 1)
1045                         return true;
1046                 userrec* u = Srv->FindNick(prefix);
1047                 if (u)
1048                 {
1049                         Srv->ChangeHost(u,params[0]);
1050                         DoOneToAllButSender(prefix,"FHOST",params,u->server);
1051                 }
1052                 return true;
1053         }
1054
1055         bool AddLine(std::string prefix, std::deque<std::string> params)
1056         {
1057                 if (params.size() < 6)
1058                         return true;
1059                 std::string linetype = params[0]; /* Z, Q, E, G, K */
1060                 std::string mask = params[1]; /* Line type dependent */
1061                 std::string source = params[2]; /* may not be online or may be a server */
1062                 std::string settime = params[3]; /* EPOCH time set */
1063                 std::string duration = params[4]; /* Duration secs */
1064                 std::string reason = params[5];
1065
1066                 switch (*(linetype.c_str()))
1067                 {
1068                         case 'Z':
1069                                 add_zline(atoi(duration.c_str()), source.c_str(), reason.c_str(), mask.c_str());
1070                         break;
1071                         case 'Q':
1072                                 add_qline(atoi(duration.c_str()), source.c_str(), reason.c_str(), mask.c_str());
1073                         break;
1074                         case 'E':
1075                                 add_eline(atoi(duration.c_str()), source.c_str(), reason.c_str(), mask.c_str());
1076                         break;
1077                         case 'G':
1078                                 add_gline(atoi(duration.c_str()), source.c_str(), reason.c_str(), mask.c_str());
1079                         break;
1080                         case 'K':
1081                                 add_kline(atoi(duration.c_str()), source.c_str(), reason.c_str(), mask.c_str());
1082                         break;
1083                         default:
1084                                 /* Just in case... */
1085                                 Srv->SendOpers("*** \2WARNING\2: Invalid xline type '"+linetype+"' sent by server "+prefix+", ignored!");
1086                         break;
1087                 }
1088                 /* Send it on its way */
1089                 params[5] = ":" + params[5];
1090                 DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
1091                 return true;
1092         }
1093
1094         bool ChangeName(std::string prefix, std::deque<std::string> params)
1095         {
1096                 if (params.size() < 1)
1097                         return true;
1098                 userrec* u = Srv->FindNick(prefix);
1099                 if (u)
1100                 {
1101                         Srv->ChangeGECOS(u,params[0]);
1102                         params[0] = ":" + params[0];
1103                         DoOneToAllButSender(prefix,"FNAME",params,u->server);
1104                 }
1105                 return true;
1106         }
1107
1108         bool LocalPing(std::string prefix, std::deque<std::string> params)
1109         {
1110                 if (params.size() < 1)
1111                         return true;
1112                 std::string stufftobounce = params[0];
1113                 this->WriteLine(":"+Srv->GetServerName()+" PONG "+stufftobounce);
1114                 return true;
1115         }
1116
1117         bool RemoteServer(std::string prefix, std::deque<std::string> params)
1118         {
1119                 if (params.size() < 4)
1120                         return false;
1121                 std::string servername = params[0];
1122                 std::string password = params[1];
1123                 // hopcount is not used for a remote server, we calculate this ourselves
1124                 std::string description = params[3];
1125                 TreeServer* ParentOfThis = FindServer(prefix);
1126                 if (!ParentOfThis)
1127                 {
1128                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
1129                         return false;
1130                 }
1131                 TreeServer* CheckDupe = FindServer(servername);
1132                 if (CheckDupe)
1133                 {
1134                         this->WriteLine("ERROR :Server "+servername+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
1135                         return false;
1136                 }
1137                 TreeServer* Node = new TreeServer(servername,description,ParentOfThis,NULL);
1138                 ParentOfThis->AddChild(Node);
1139                 params[3] = ":" + params[3];
1140                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
1141                 Srv->SendOpers("*** Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
1142                 return true;
1143         }
1144
1145         bool Outbound_Reply_Server(std::deque<std::string> params)
1146         {
1147                 if (params.size() < 4)
1148                         return false;
1149                 std::string servername = params[0];
1150                 std::string password = params[1];
1151                 int hops = atoi(params[2].c_str());
1152                 if (hops)
1153                 {
1154                         this->WriteLine("ERROR :Server too far away for authentication");
1155                         return false;
1156                 }
1157                 std::string description = params[3];
1158                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
1159                 {
1160                         if ((x->Name == servername) && (x->RecvPass == password))
1161                         {
1162                                 TreeServer* CheckDupe = FindServer(servername);
1163                                 if (CheckDupe)
1164                                 {
1165                                         this->WriteLine("ERROR :Server "+servername+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
1166                                         return false;
1167                                 }
1168                                 // Begin the sync here. this kickstarts the
1169                                 // other side, waiting in WAIT_AUTH_2 state,
1170                                 // into starting their burst, as it shows
1171                                 // that we're happy.
1172                                 this->LinkState = CONNECTED;
1173                                 // we should add the details of this server now
1174                                 // to the servers tree, as a child of the root
1175                                 // node.
1176                                 TreeServer* Node = new TreeServer(servername,description,TreeRoot,this);
1177                                 TreeRoot->AddChild(Node);
1178                                 params[3] = ":" + params[3];
1179                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,servername);
1180                                 this->DoBurst(Node);
1181                                 return true;
1182                         }
1183                 }
1184                 this->WriteLine("ERROR :Invalid credentials");
1185                 return false;
1186         }
1187
1188         bool Inbound_Server(std::deque<std::string> params)
1189         {
1190                 if (params.size() < 4)
1191                         return false;
1192                 std::string servername = params[0];
1193                 std::string password = params[1];
1194                 int hops = atoi(params[2].c_str());
1195                 if (hops)
1196                 {
1197                         this->WriteLine("ERROR :Server too far away for authentication");
1198                         return false;
1199                 }
1200                 std::string description = params[3];
1201                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
1202                 {
1203                         if ((x->Name == servername) && (x->RecvPass == password))
1204                         {
1205                                 TreeServer* CheckDupe = FindServer(servername);
1206                                 if (CheckDupe)
1207                                 {
1208                                         this->WriteLine("ERROR :Server "+servername+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
1209                                         return false;
1210                                 }
1211                                 Srv->SendOpers("*** Verified incoming server connection from \002"+servername+"\002["+this->GetIP()+"] ("+description+")");
1212                                 this->InboundServerName = servername;
1213                                 this->InboundDescription = description;
1214                                 // this is good. Send our details: Our server name and description and hopcount of 0,
1215                                 // along with the sendpass from this block.
1216                                 this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
1217                                 // move to the next state, we are now waiting for THEM.
1218                                 this->LinkState = WAIT_AUTH_2;
1219                                 return true;
1220                         }
1221                 }
1222                 this->WriteLine("ERROR :Invalid credentials");
1223                 return false;
1224         }
1225
1226         std::deque<std::string> Split(std::string line, bool stripcolon)
1227         {
1228                 std::deque<std::string> n;
1229                 if (!strchr(line.c_str(),' '))
1230                 {
1231                         n.push_back(line);
1232                         return n;
1233                 }
1234                 std::stringstream s(line);
1235                 std::string param = "";
1236                 n.clear();
1237                 int item = 0;
1238                 while (!s.eof())
1239                 {
1240                         char c;
1241                         s.get(c);
1242                         if (c == ' ')
1243                         {
1244                                 n.push_back(param);
1245                                 param = "";
1246                                 item++;
1247                         }
1248                         else
1249                         {
1250                                 if (!s.eof())
1251                                 {
1252                                         param = param + c;
1253                                 }
1254                                 if ((param == ":") && (item > 0))
1255                                 {
1256                                         param = "";
1257                                         while (!s.eof())
1258                                         {
1259                                                 s.get(c);
1260                                                 if (!s.eof())
1261                                                 {
1262                                                         param = param + c;
1263                                                 }
1264                                         }
1265                                         n.push_back(param);
1266                                         param = "";
1267                                 }
1268                         }
1269                 }
1270                 if (param != "")
1271                 {
1272                         n.push_back(param);
1273                 }
1274                 return n;
1275         }
1276
1277         bool ProcessLine(std::string line)
1278         {
1279                 char* l = (char*)line.c_str();
1280                 while ((strlen(l)) && (l[strlen(l)-1] == '\r') || (l[strlen(l)-1] == '\n'))
1281                         l[strlen(l)-1] = '\0';
1282                 line = l;
1283                 if (line == "")
1284                         return true;
1285                 Srv->Log(DEBUG,"IN: '"+line+"'");
1286                 std::deque<std::string> params = this->Split(line,true);
1287                 std::string command = "";
1288                 std::string prefix = "";
1289                 if (((params[0].c_str())[0] == ':') && (params.size() > 1))
1290                 {
1291                         prefix = params[0];
1292                         command = params[1];
1293                         char* pref = (char*)prefix.c_str();
1294                         prefix = ++pref;
1295                         params.pop_front();
1296                         params.pop_front();
1297                 }
1298                 else
1299                 {
1300                         prefix = "";
1301                         command = params[0];
1302                         params.pop_front();
1303                 }
1304
1305                 switch (this->LinkState)
1306                 {
1307                         TreeServer* Node;
1308
1309                         case WAIT_AUTH_1:
1310                                 // Waiting for SERVER command from remote server. Server initiating
1311                                 // the connection sends the first SERVER command, listening server
1312                                 // replies with theirs if its happy, then if the initiator is happy,
1313                                 // it starts to send its net sync, which starts the merge, otherwise
1314                                 // it sends an ERROR.
1315                                 if (command == "SERVER")
1316                                 {
1317                                         return this->Inbound_Server(params);
1318                                 }
1319                                 else if (command == "ERROR")
1320                                 {
1321                                         return this->Error(params);
1322                                 }
1323                         break;
1324                         case WAIT_AUTH_2:
1325                                 // Waiting for start of other side's netmerge to say they liked our
1326                                 // password.
1327                                 if (command == "SERVER")
1328                                 {
1329                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
1330                                         // silently ignore.
1331                                         return true;
1332                                 }
1333                                 else if (command == "BURST")
1334                                 {
1335                                         this->LinkState = CONNECTED;
1336                                         Node = new TreeServer(InboundServerName,InboundDescription,TreeRoot,this);
1337                                         TreeRoot->AddChild(Node);
1338                                         params.clear();
1339                                         params.push_back(InboundServerName);
1340                                         params.push_back("*");
1341                                         params.push_back("1");
1342                                         params.push_back(":"+InboundDescription);
1343                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
1344                                         this->DoBurst(Node);
1345                                 }
1346                                 else if (command == "ERROR")
1347                                 {
1348                                         return this->Error(params);
1349                                 }
1350
1351                         break;
1352                         case LISTENER:
1353                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
1354                                 return false;
1355                         break;
1356                         case CONNECTING:
1357                                 if (command == "SERVER")
1358                                 {
1359                                         // another server we connected to, which was in WAIT_AUTH_1 state,
1360                                         // has just sent us their credentials. If we get this far, theyre
1361                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
1362                                         // if we're happy with this, we should send our netburst which
1363                                         // kickstarts the merge.
1364                                         return this->Outbound_Reply_Server(params);
1365                                 }
1366                                 else if (command == "ERROR")
1367                                 {
1368                                         return this->Error(params);
1369                                 }
1370                         break;
1371                         case CONNECTED:
1372                                 // This is the 'authenticated' state, when all passwords
1373                                 // have been exchanged and anything past this point is taken
1374                                 // as gospel.
1375                                 std::string target = "";
1376                                 if ((command == "NICK") && (params.size() > 1))
1377                                 {
1378                                         return this->IntroduceClient(prefix,params);
1379                                 }
1380                                 else if (command == "FJOIN")
1381                                 {
1382                                         return this->ForceJoin(prefix,params);
1383                                 }
1384                                 else if (command == "SERVER")
1385                                 {
1386                                         return this->RemoteServer(prefix,params);
1387                                 }
1388                                 else if (command == "ERROR")
1389                                 {
1390                                         return this->Error(params);
1391                                 }
1392                                 else if (command == "OPERTYPE")
1393                                 {
1394                                         return this->OperType(prefix,params);
1395                                 }
1396                                 else if (command == "FMODE")
1397                                 {
1398                                         return this->ForceMode(prefix,params);
1399                                 }
1400                                 else if (command == "KILL")
1401                                 {
1402                                         return this->RemoteKill(prefix,params);
1403                                 }
1404                                 else if (command == "FTOPIC")
1405                                 {
1406                                         return this->ForceTopic(prefix,params);
1407                                 }
1408                                 else if (command == "REHASH")
1409                                 {
1410                                         return this->RemoteRehash(prefix,params);
1411                                 }
1412                                 else if (command == "PING")
1413                                 {
1414                                         return this->LocalPing(prefix,params);
1415                                 }
1416                                 else if (command == "PONG")
1417                                 {
1418                                         return this->LocalPong(prefix,params);
1419                                 }
1420                                 else if (command == "VERSION")
1421                                 {
1422                                         return this->ServerVersion(prefix,params);
1423                                 }
1424                                 else if (command == "FHOST")
1425                                 {
1426                                         return this->ChangeHost(prefix,params);
1427                                 }
1428                                 else if (command == "FNAME")
1429                                 {
1430                                         return this->ChangeName(prefix,params);
1431                                 }
1432                                 else if (command == "ADDLINE")
1433                                 {
1434                                         return this->AddLine(prefix,params);
1435                                 }
1436                                 else if (command == "SVSNICK")
1437                                 {
1438                                         return this->ForceNick(prefix,params);
1439                                 }
1440                                 else if (command == "SVSJOIN")
1441                                 {
1442                                         return this->ServiceJoin(prefix,params);
1443                                 }
1444                                 else if (command == "SQUIT")
1445                                 {
1446                                         if (params.size() == 2)
1447                                         {
1448                                                 this->Squit(FindServer(params[0]),params[1]);
1449                                         }
1450                                         return true;
1451                                 }
1452                                 else
1453                                 {
1454                                         // not a special inter-server command.
1455                                         // Emulate the actual user doing the command,
1456                                         // this saves us having a huge ugly parser.
1457                                         userrec* who = Srv->FindNick(prefix);
1458                                         std::string sourceserv = this->myhost;
1459                                         if (this->InboundServerName != "")
1460                                         {
1461                                                 sourceserv = this->InboundServerName;
1462                                         }
1463                                         if (who)
1464                                         {
1465                                                 // its a user
1466                                                 target = who->server;
1467                                                 char* strparams[127];
1468                                                 for (unsigned int q = 0; q < params.size(); q++)
1469                                                 {
1470                                                         strparams[q] = (char*)params[q].c_str();
1471                                                 }
1472                                                 Srv->CallCommandHandler(command, strparams, params.size(), who);
1473                                         }
1474                                         else
1475                                         {
1476                                                 // its not a user. Its either a server, or somethings screwed up.
1477                                                 if (IsServer(prefix))
1478                                                 {
1479                                                         target = Srv->GetServerName();
1480                                                 }
1481                                                 else
1482                                                 {
1483                                                         log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
1484                                                         return true;
1485                                                 }
1486                                         }
1487                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1488
1489                                 }
1490                                 return true;
1491                         break;
1492                 }
1493                 return true;
1494         }
1495
1496         virtual std::string GetName()
1497         {
1498                 std::string sourceserv = this->myhost;
1499                 if (this->InboundServerName != "")
1500                 {
1501                         sourceserv = this->InboundServerName;
1502                 }
1503                 return sourceserv;
1504         }
1505
1506         virtual void OnTimeout()
1507         {
1508                 if (this->LinkState == CONNECTING)
1509                 {
1510                         Srv->SendOpers("*** CONNECT: Connection to \002"+myhost+"\002 timed out.");
1511                 }
1512         }
1513
1514         virtual void OnClose()
1515         {
1516                 // Connection closed.
1517                 // If the connection is fully up (state CONNECTED)
1518                 // then propogate a netsplit to all peers.
1519                 std::string quitserver = this->myhost;
1520                 if (this->InboundServerName != "")
1521                 {
1522                         quitserver = this->InboundServerName;
1523                 }
1524                 TreeServer* s = FindServer(quitserver);
1525                 if (s)
1526                 {
1527                         Squit(s,"Remote host closed the connection");
1528                 }
1529         }
1530
1531         virtual int OnIncomingConnection(int newsock, char* ip)
1532         {
1533                 TreeSocket* s = new TreeSocket(newsock, ip);
1534                 Srv->AddSocket(s);
1535                 return true;
1536         }
1537 };
1538
1539 void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
1540 {
1541         for (unsigned int c = 0; c < list.size(); c++)
1542         {
1543                 if (list[c] == server)
1544                 {
1545                         return;
1546                 }
1547         }
1548         list.push_back(server);
1549 }
1550
1551 // returns a list of DIRECT servernames for a specific channel
1552 void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
1553 {
1554         std::vector<char*> *ulist = c->GetUsers();
1555         unsigned int ucount = ulist->size();
1556         for (unsigned int i = 0; i < ucount; i++)
1557         {
1558                 char* o = (*ulist)[i];
1559                 userrec* otheruser = (userrec*)o;
1560                 if (std::string(otheruser->server) != Srv->GetServerName())
1561                 {
1562                         TreeServer* best = BestRouteTo(otheruser->server);
1563                         if (best)
1564                                 AddThisServer(best,list);
1565                 }
1566         }
1567         return;
1568 }
1569
1570 bool DoOneToAllButSenderRaw(std::string data,std::string omit,std::string prefix,std::string command,std::deque<std::string> params)
1571 {
1572         TreeServer* omitroute = BestRouteTo(omit);
1573         if ((command == "NOTICE") || (command == "PRIVMSG"))
1574         {
1575                 if ((params.size() >= 2) && (*(params[0].c_str()) != '$'))
1576                 {
1577                         if (*(params[0].c_str()) != '#')
1578                         {
1579                                 // special routing for private messages/notices
1580                                 userrec* d = Srv->FindNick(params[0]);
1581                                 if (d)
1582                                 {
1583                                         std::deque<std::string> par;
1584                                         par.push_back(params[0]);
1585                                         par.push_back(":"+params[1]);
1586                                         DoOneToOne(prefix,command,par,d->server);
1587                                         return true;
1588                                 }
1589                         }
1590                         else
1591                         {
1592                                 log(DEBUG,"Channel privmsg going to chan %s",params[0].c_str());
1593                                 chanrec* c = Srv->FindChannel(params[0]);
1594                                 if (c)
1595                                 {
1596                                         std::deque<TreeServer*> list;
1597                                         GetListOfServersForChannel(c,list);
1598                                         log(DEBUG,"Got a list of %d servers",list.size());
1599                                         unsigned int lsize = list.size();
1600                                         for (unsigned int i = 0; i < lsize; i++)
1601                                         {
1602                                                 TreeSocket* Sock = list[i]->GetSocket();
1603                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
1604                                                 {
1605                                                         log(DEBUG,"Writing privmsg to server %s",list[i]->GetName().c_str());
1606                                                         Sock->WriteLine(data);
1607                                                 }
1608                                         }
1609                                         return true;
1610                                 }
1611                         }
1612                 }
1613         }
1614         unsigned int items = TreeRoot->ChildCount();
1615         for (unsigned int x = 0; x < items; x++)
1616         {
1617                 TreeServer* Route = TreeRoot->GetChild(x);
1618                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
1619                 {
1620                         TreeSocket* Sock = Route->GetSocket();
1621                         Sock->WriteLine(data);
1622                 }
1623         }
1624         return true;
1625 }
1626
1627 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> params, std::string omit)
1628 {
1629         TreeServer* omitroute = BestRouteTo(omit);
1630         std::string FullLine = ":" + prefix + " " + command;
1631         unsigned int words = params.size();
1632         for (unsigned int x = 0; x < words; x++)
1633         {
1634                 FullLine = FullLine + " " + params[x];
1635         }
1636         unsigned int items = TreeRoot->ChildCount();
1637         for (unsigned int x = 0; x < items; x++)
1638         {
1639                 TreeServer* Route = TreeRoot->GetChild(x);
1640                 // Send the line IF:
1641                 // The route has a socket (its a direct connection)
1642                 // The route isnt the one to be omitted
1643                 // The route isnt the path to the one to be omitted
1644                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
1645                 {
1646                         TreeSocket* Sock = Route->GetSocket();
1647                         Sock->WriteLine(FullLine);
1648                 }
1649         }
1650         return true;
1651 }
1652
1653 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> params)
1654 {
1655         std::string FullLine = ":" + prefix + " " + command;
1656         unsigned int words = params.size();
1657         for (unsigned int x = 0; x < words; x++)
1658         {
1659                 FullLine = FullLine + " " + params[x];
1660         }
1661         unsigned int items = TreeRoot->ChildCount();
1662         for (unsigned int x = 0; x < items; x++)
1663         {
1664                 TreeServer* Route = TreeRoot->GetChild(x);
1665                 if (Route->GetSocket())
1666                 {
1667                         TreeSocket* Sock = Route->GetSocket();
1668                         Sock->WriteLine(FullLine);
1669                 }
1670         }
1671         return true;
1672 }
1673
1674 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> params, std::string target)
1675 {
1676         TreeServer* Route = BestRouteTo(target);
1677         if (Route)
1678         {
1679                 std::string FullLine = ":" + prefix + " " + command;
1680                 unsigned int words = params.size();
1681                 for (unsigned int x = 0; x < words; x++)
1682                 {
1683                         FullLine = FullLine + " " + params[x];
1684                 }
1685                 if (Route->GetSocket())
1686                 {
1687                         TreeSocket* Sock = Route->GetSocket();
1688                         Sock->WriteLine(FullLine);
1689                 }
1690                 return true;
1691         }
1692         else
1693         {
1694                 return true;
1695         }
1696 }
1697
1698 std::vector<TreeSocket*> Bindings;
1699
1700 void ReadConfiguration(bool rebind)
1701 {
1702         if (rebind)
1703         {
1704                 for (int j =0; j < Conf->Enumerate("bind"); j++)
1705                 {
1706                         std::string Type = Conf->ReadValue("bind","type",j);
1707                         std::string IP = Conf->ReadValue("bind","address",j);
1708                         long Port = Conf->ReadInteger("bind","port",j,true);
1709                         if (Type == "servers")
1710                         {
1711                                 if (IP == "*")
1712                                 {
1713                                         IP = "";
1714                                 }
1715                                 TreeSocket* listener = new TreeSocket(IP.c_str(),Port,true,10);
1716                                 if (listener->GetState() == I_LISTENING)
1717                                 {
1718                                         Srv->AddSocket(listener);
1719                                         Bindings.push_back(listener);
1720                                 }
1721                                 else
1722                                 {
1723                                         log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
1724                                         listener->Close();
1725                                         delete listener;
1726                                 }
1727                         }
1728                 }
1729         }
1730         LinkBlocks.clear();
1731         for (int j =0; j < Conf->Enumerate("link"); j++)
1732         {
1733                 Link L;
1734                 L.Name = Conf->ReadValue("link","name",j);
1735                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
1736                 L.Port = Conf->ReadInteger("link","port",j,true);
1737                 L.SendPass = Conf->ReadValue("link","sendpass",j);
1738                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
1739                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
1740                 L.NextConnectTime = time(NULL) + L.AutoConnect;
1741                 LinkBlocks.push_back(L);
1742                 log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
1743         }
1744 }
1745
1746
1747 class ModuleSpanningTree : public Module
1748 {
1749         std::vector<TreeSocket*> Bindings;
1750         int line;
1751         int NumServers;
1752
1753  public:
1754
1755         ModuleSpanningTree()
1756         {
1757                 Srv = new Server;
1758                 Conf = new ConfigReader;
1759                 Bindings.clear();
1760
1761                 // Create the root of the tree
1762                 TreeRoot = new TreeServer(Srv->GetServerName(),Srv->GetServerDescription());
1763
1764                 ReadConfiguration(true);
1765         }
1766
1767         void ShowLinks(TreeServer* Current, userrec* user, int hops)
1768         {
1769                 std::string Parent = TreeRoot->GetName();
1770                 if (Current->GetParent())
1771                 {
1772                         Parent = Current->GetParent()->GetName();
1773                 }
1774                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1775                 {
1776                         ShowLinks(Current->GetChild(q),user,hops+1);
1777                 }
1778                 WriteServ(user->fd,"364 %s %s %s :%d %s",user->nick,Current->GetName().c_str(),Parent.c_str(),hops,Current->GetDesc().c_str());
1779         }
1780
1781         int CountLocalServs()
1782         {
1783                 return TreeRoot->ChildCount();
1784         }
1785
1786         void CountServsRecursive(TreeServer* Current)
1787         {
1788                 NumServers++;
1789                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1790                 {
1791                         CountServsRecursive(Current->GetChild(q));
1792                 }
1793         }
1794
1795         int CountServs()
1796         {
1797                 NumServers = 0;
1798                 CountServsRecursive(TreeRoot);
1799                 return NumServers;
1800         }
1801
1802         void HandleLinks(char** parameters, int pcnt, userrec* user)
1803         {
1804                 ShowLinks(TreeRoot,user,0);
1805                 WriteServ(user->fd,"365 %s * :End of /LINKS list.",user->nick);
1806                 return;
1807         }
1808
1809         void HandleLusers(char** parameters, int pcnt, userrec* user)
1810         {
1811                 WriteServ(user->fd,"251 %s :There are %d users and %d invisible on %d servers",user->nick,usercnt()-usercount_invisible(),usercount_invisible(),this->CountServs());
1812                 WriteServ(user->fd,"252 %s %d :operator(s) online",user->nick,usercount_opers());
1813                 WriteServ(user->fd,"253 %s %d :unknown connections",user->nick,usercount_unknown());
1814                 WriteServ(user->fd,"254 %s %d :channels formed",user->nick,chancount());
1815                 WriteServ(user->fd,"254 %s :I have %d clients and %d servers",user->nick,local_count(),this->CountLocalServs());
1816                 return;
1817         }
1818
1819         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
1820
1821         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80])
1822         {
1823                 if (line < 128)
1824                 {
1825                         for (int t = 0; t < depth; t++)
1826                         {
1827                                 matrix[line][t] = ' ';
1828                         }
1829                         strlcpy(&matrix[line][depth],Current->GetName().c_str(),80);
1830                         line++;
1831                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
1832                         {
1833                                 ShowMap(Current->GetChild(q),user,depth+2,matrix);
1834                         }
1835                 }
1836         }
1837
1838         // Ok, prepare to be confused.
1839         // After much mulling over how to approach this, it struck me that
1840         // the 'usual' way of doing a /MAP isnt the best way. Instead of
1841         // keeping track of a ton of ascii characters, and line by line
1842         // under recursion working out where to place them using multiplications
1843         // and divisons, we instead render the map onto a backplane of characters
1844         // (a character matrix), then draw the branches as a series of "L" shapes
1845         // from the nodes. This is not only friendlier on CPU it uses less stack.
1846
1847         void HandleMap(char** parameters, int pcnt, userrec* user)
1848         {
1849                 // This array represents a virtual screen which we will
1850                 // "scratch" draw to, as the console device of an irc
1851                 // client does not provide for a proper terminal.
1852                 char matrix[128][80];
1853                 for (unsigned int t = 0; t < 128; t++)
1854                 {
1855                         matrix[t][0] = '\0';
1856                 }
1857                 line = 0;
1858                 // The only recursive bit is called here.
1859                 ShowMap(TreeRoot,user,0,matrix);
1860                 // Process each line one by one. The algorithm has a limit of
1861                 // 128 servers (which is far more than a spanning tree should have
1862                 // anyway, so we're ok). This limit can be raised simply by making
1863                 // the character matrix deeper, 128 rows taking 10k of memory.
1864                 for (int l = 1; l < line; l++)
1865                 {
1866                         // scan across the line looking for the start of the
1867                         // servername (the recursive part of the algorithm has placed
1868                         // the servers at indented positions depending on what they
1869                         // are related to)
1870                         int first_nonspace = 0;
1871                         while (matrix[l][first_nonspace] == ' ')
1872                         {
1873                                 first_nonspace++;
1874                         }
1875                         first_nonspace--;
1876                         // Draw the `- (corner) section: this may be overwritten by
1877                         // another L shape passing along the same vertical pane, becoming
1878                         // a |- (branch) section instead.
1879                         matrix[l][first_nonspace] = '-';
1880                         matrix[l][first_nonspace-1] = '`';
1881                         int l2 = l - 1;
1882                         // Draw upwards until we hit the parent server, causing possibly
1883                         // other corners (`-) to become branches (|-)
1884                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
1885                         {
1886                                 matrix[l2][first_nonspace-1] = '|';
1887                                 l2--;
1888                         }
1889                 }
1890                 // dump the whole lot to the user. This is the easy bit, honest.
1891                 for (int t = 0; t < line; t++)
1892                 {
1893                         WriteServ(user->fd,"006 %s :%s",user->nick,&matrix[t][0]);
1894                 }
1895                 WriteServ(user->fd,"007 %s :End of /MAP",user->nick);
1896                 return;
1897         }
1898
1899         int HandleSquit(char** parameters, int pcnt, userrec* user)
1900         {
1901                 TreeServer* s = FindServerMask(parameters[0]);
1902                 if (s)
1903                 {
1904                         TreeSocket* sock = s->GetSocket();
1905                         if (sock)
1906                         {
1907                                 WriteOpers("*** SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
1908                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
1909                                 sock->Close();
1910                         }
1911                         else
1912                         {
1913                                 WriteServ(user->fd,"NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
1914                         }
1915                 }
1916                 else
1917                 {
1918                          WriteServ(user->fd,"NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
1919                 }
1920                 return 1;
1921         }
1922
1923         void DoPingChecks(time_t curtime)
1924         {
1925                 for (unsigned int j = 0; j < TreeRoot->ChildCount(); j++)
1926                 {
1927                         TreeServer* serv = TreeRoot->GetChild(j);
1928                         TreeSocket* sock = serv->GetSocket();
1929                         if (sock)
1930                         {
1931                                 if (curtime >= serv->NextPingTime())
1932                                 {
1933                                         if (serv->AnsweredLastPing())
1934                                         {
1935                                                 sock->WriteLine(":"+Srv->GetServerName()+" PING "+serv->GetName());
1936                                                 serv->SetNextPingTime(curtime + 60);
1937                                         }
1938                                         else
1939                                         {
1940                                                 // they didnt answer, boot them
1941                                                 WriteOpers("*** Server \002%s\002 pinged out",serv->GetName().c_str());
1942                                                 sock->Squit(serv,"Ping timeout");
1943                                                 sock->Close();
1944                                                 return;
1945                                         }
1946                                 }
1947                         }
1948                 }
1949         }
1950
1951         void AutoConnectServers(time_t curtime)
1952         {
1953                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
1954                 {
1955                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
1956                         {
1957                                 log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
1958                                 x->NextConnectTime = curtime + x->AutoConnect;
1959                                 TreeServer* CheckDupe = FindServer(x->Name);
1960                                 if (!CheckDupe)
1961                                 {
1962                                         // an autoconnected server is not connected. Check if its time to connect it
1963                                         WriteOpers("*** AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
1964                                         TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name);
1965                                         Srv->AddSocket(newsocket);
1966                                 }
1967                         }
1968                 }
1969         }
1970
1971         int HandleVersion(char** parameters, int pcnt, userrec* user)
1972         {
1973                 // we've already checked if pcnt > 0, so this is safe
1974                 TreeServer* found = FindServerMask(parameters[0]);
1975                 if (found)
1976                 {
1977                         std::string Version = found->GetVersion();
1978                         WriteServ(user->fd,"351 %s :%s",user->nick,Version.c_str());
1979                 }
1980                 else
1981                 {
1982                         WriteServ(user->fd,"402 %s %s :No such server",user->nick,parameters[0]);
1983                 }
1984                 return 1;
1985         }
1986
1987         int HandleConnect(char** parameters, int pcnt, userrec* user)
1988         {
1989                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
1990                 {
1991                         if (Srv->MatchText(x->Name.c_str(),parameters[0]))
1992                         {
1993                                 TreeServer* CheckDupe = FindServer(x->Name);
1994                                 if (!CheckDupe)
1995                                 {
1996                                         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);
1997                                         TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name);
1998                                         Srv->AddSocket(newsocket);
1999                                         return 1;
2000                                 }
2001                                 else
2002                                 {
2003                                         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());
2004                                         return 1;
2005                                 }
2006                         }
2007                 }
2008                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
2009                 return 1;
2010         }
2011
2012         virtual int OnPreCommand(std::string command, char **parameters, int pcnt, userrec *user)
2013         {
2014                 if (command == "CONNECT")
2015                 {
2016                         return this->HandleConnect(parameters,pcnt,user);
2017                 }
2018                 else if (command == "SQUIT")
2019                 {
2020                         return this->HandleSquit(parameters,pcnt,user);
2021                 }
2022                 else if (command == "MAP")
2023                 {
2024                         this->HandleMap(parameters,pcnt,user);
2025                         return 1;
2026                 }
2027                 else if (command == "LUSERS")
2028                 {
2029                         this->HandleLusers(parameters,pcnt,user);
2030                         return 1;
2031                 }
2032                 else if (command == "LINKS")
2033                 {
2034                         this->HandleLinks(parameters,pcnt,user);
2035                         return 1;
2036                 }
2037                 else if ((command == "VERSION") && (pcnt > 0))
2038                 {
2039                         this->HandleVersion(parameters,pcnt,user);
2040                         return 1;
2041                 }
2042                 else if (Srv->IsValidModuleCommand(command, pcnt, user))
2043                 {
2044                         // this bit of code cleverly routes all module commands
2045                         // to all remote severs *automatically* so that modules
2046                         // can just handle commands locally, without having
2047                         // to have any special provision in place for remote
2048                         // commands and linking protocols.
2049                         std::deque<std::string> params;
2050                         params.clear();
2051                         for (int j = 0; j < pcnt; j++)
2052                         {
2053                                 if (strchr(parameters[j],' '))
2054                                 {
2055                                         params.push_back(":" + std::string(parameters[j]));
2056                                 }
2057                                 else
2058                                 {
2059                                         params.push_back(std::string(parameters[j]));
2060                                 }
2061                         }
2062                         DoOneToMany(user->nick,command,params);
2063                 }
2064                 return 0;
2065         }
2066
2067         virtual void OnGetServerDescription(std::string servername,std::string &description)
2068         {
2069                 TreeServer* s = FindServer(servername);
2070                 if (s)
2071                 {
2072                         description = s->GetDesc();
2073                 }
2074         }
2075
2076         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
2077         {
2078                 if (std::string(source->server) == Srv->GetServerName())
2079                 {
2080                         std::deque<std::string> params;
2081                         params.push_back(dest->nick);
2082                         params.push_back(channel->name);
2083                         DoOneToMany(source->nick,"INVITE",params);
2084                 }
2085         }
2086
2087         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, std::string topic)
2088         {
2089                 std::deque<std::string> params;
2090                 params.push_back(chan->name);
2091                 params.push_back(":"+topic);
2092                 DoOneToMany(user->nick,"TOPIC",params);
2093         }
2094
2095         virtual void OnWallops(userrec* user, std::string text)
2096         {
2097                 if (std::string(user->server) == Srv->GetServerName())
2098                 {
2099                         std::deque<std::string> params;
2100                         params.push_back(":"+text);
2101                         DoOneToMany(user->nick,"WALLOPS",params);
2102                 }
2103         }
2104
2105         virtual void OnUserNotice(userrec* user, void* dest, int target_type, std::string text)
2106         {
2107                 if (target_type == TYPE_USER)
2108                 {
2109                         userrec* d = (userrec*)dest;
2110                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
2111                         {
2112                                 std::deque<std::string> params;
2113                                 params.clear();
2114                                 params.push_back(d->nick);
2115                                 params.push_back(":"+text);
2116                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
2117                         }
2118                 }
2119                 else
2120                 {
2121                         if (std::string(user->server) == Srv->GetServerName())
2122                         {
2123                                 chanrec *c = (chanrec*)dest;
2124                                 std::deque<TreeServer*> list;
2125                                 GetListOfServersForChannel(c,list);
2126                                 unsigned int ucount = list.size();
2127                                 for (unsigned int i = 0; i < ucount; i++)
2128                                 {
2129                                         TreeSocket* Sock = list[i]->GetSocket();
2130                                         if (Sock)
2131                                                 Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+std::string(c->name)+" :"+text);
2132                                 }
2133                         }
2134                 }
2135         }
2136
2137         virtual void OnUserMessage(userrec* user, void* dest, int target_type, std::string text)
2138         {
2139                 if (target_type == TYPE_USER)
2140                 {
2141                         // route private messages which are targetted at clients only to the server
2142                         // which needs to receive them
2143                         userrec* d = (userrec*)dest;
2144                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
2145                         {
2146                                 std::deque<std::string> params;
2147                                 params.clear();
2148                                 params.push_back(d->nick);
2149                                 params.push_back(":"+text);
2150                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
2151                         }
2152                 }
2153                 else
2154                 {
2155                         if (std::string(user->server) == Srv->GetServerName())
2156                         {
2157                                 chanrec *c = (chanrec*)dest;
2158                                 std::deque<TreeServer*> list;
2159                                 GetListOfServersForChannel(c,list);
2160                                 unsigned int ucount = list.size();
2161                                 for (unsigned int i = 0; i < ucount; i++)
2162                                 {
2163                                         TreeSocket* Sock = list[i]->GetSocket();
2164                                         if (Sock)
2165                                                 Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+std::string(c->name)+" :"+text);
2166                                 }
2167                         }
2168                 }
2169         }
2170
2171         virtual void OnBackgroundTimer(time_t curtime)
2172         {
2173                 AutoConnectServers(curtime);
2174                 DoPingChecks(curtime);
2175         }
2176
2177         virtual void OnUserJoin(userrec* user, chanrec* channel)
2178         {
2179                 // Only do this for local users
2180                 if (std::string(user->server) == Srv->GetServerName())
2181                 {
2182                         std::deque<std::string> params;
2183                         params.clear();
2184                         params.push_back(channel->name);
2185                         if (*channel->key)
2186                         {
2187                                 // if the channel has a key, force the join by emulating the key.
2188                                 params.push_back(channel->key);
2189                         }
2190                         if (channel->GetUserCounter() > 1)
2191                         {
2192                                 // not the first in the channel
2193                                 DoOneToMany(user->nick,"JOIN",params);
2194                         }
2195                         else
2196                         {
2197                                 // first in the channel, set up their permissions
2198                                 // and the channel TS with FJOIN.
2199                                 char ts[24];
2200                                 snprintf(ts,24,"%lu",(unsigned long)channel->age);
2201                                 params.clear();
2202                                 params.push_back(channel->name);
2203                                 params.push_back(ts);
2204                                 params.push_back("@"+std::string(user->nick));
2205                                 DoOneToMany(Srv->GetServerName(),"FJOIN",params);
2206                         }
2207                 }
2208         }
2209
2210         virtual void OnChangeHost(userrec* user, std::string newhost)
2211         {
2212                 // only occurs for local clients
2213                 std::deque<std::string> params;
2214                 params.push_back(newhost);
2215                 DoOneToMany(user->nick,"FHOST",params);
2216         }
2217
2218         virtual void OnChangeName(userrec* user, std::string gecos)
2219         {
2220                 // only occurs for local clients
2221                 std::deque<std::string> params;
2222                 params.push_back(gecos);
2223                 DoOneToMany(user->nick,"FNAME",params);
2224         }
2225
2226         virtual void OnUserPart(userrec* user, chanrec* channel)
2227         {
2228                 if (std::string(user->server) == Srv->GetServerName())
2229                 {
2230                         std::deque<std::string> params;
2231                         params.push_back(channel->name);
2232                         DoOneToMany(user->nick,"PART",params);
2233                 }
2234         }
2235
2236         virtual void OnUserConnect(userrec* user)
2237         {
2238                 char agestr[MAXBUF];
2239                 if (std::string(user->server) == Srv->GetServerName())
2240                 {
2241                         std::deque<std::string> params;
2242                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
2243                         params.push_back(agestr);
2244                         params.push_back(user->nick);
2245                         params.push_back(user->host);
2246                         params.push_back(user->dhost);
2247                         params.push_back(user->ident);
2248                         params.push_back("+"+std::string(user->modes));
2249                         params.push_back(user->ip);
2250                         params.push_back(":"+std::string(user->fullname));
2251                         DoOneToMany(Srv->GetServerName(),"NICK",params);
2252                 }
2253         }
2254
2255         virtual void OnUserQuit(userrec* user, std::string reason)
2256         {
2257                 if (std::string(user->server) == Srv->GetServerName())
2258                 {
2259                         std::deque<std::string> params;
2260                         params.push_back(":"+reason);
2261                         DoOneToMany(user->nick,"QUIT",params);
2262                 }
2263         }
2264
2265         virtual void OnUserPostNick(userrec* user, std::string oldnick)
2266         {
2267                 if (std::string(user->server) == Srv->GetServerName())
2268                 {
2269                         std::deque<std::string> params;
2270                         params.push_back(user->nick);
2271                         DoOneToMany(oldnick,"NICK",params);
2272                 }
2273         }
2274
2275         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, std::string reason)
2276         {
2277                 if (std::string(source->server) == Srv->GetServerName())
2278                 {
2279                         std::deque<std::string> params;
2280                         params.push_back(chan->name);
2281                         params.push_back(user->nick);
2282                         params.push_back(":"+reason);
2283                         DoOneToMany(source->nick,"KICK",params);
2284                 }
2285         }
2286
2287         virtual void OnRemoteKill(userrec* source, userrec* dest, std::string reason)
2288         {
2289                 std::deque<std::string> params;
2290                 params.push_back(dest->nick);
2291                 params.push_back(":"+reason);
2292                 DoOneToMany(source->nick,"KILL",params);
2293         }
2294
2295         virtual void OnRehash(std::string parameter)
2296         {
2297                 if (parameter != "")
2298                 {
2299                         std::deque<std::string> params;
2300                         params.push_back(parameter);
2301                         DoOneToMany(Srv->GetServerName(),"REHASH",params);
2302                         // check for self
2303                         if (Srv->MatchText(Srv->GetServerName(),parameter))
2304                         {
2305                                 Srv->SendOpers("*** Remote rehash initiated from server \002"+Srv->GetServerName()+"\002.");
2306                                 Srv->RehashServer();
2307                         }
2308                 }
2309                 ReadConfiguration(false);
2310         }
2311
2312         // note: the protocol does not allow direct umode +o except
2313         // via NICK with 8 params. sending OPERTYPE infers +o modechange
2314         // locally.
2315         virtual void OnOper(userrec* user, std::string opertype)
2316         {
2317                 if (std::string(user->server) == Srv->GetServerName())
2318                 {
2319                         std::deque<std::string> params;
2320                         params.push_back(opertype);
2321                         DoOneToMany(user->nick,"OPERTYPE",params);
2322                 }
2323         }
2324
2325         void OnLine(userrec* source, std::string host, bool adding, char linetype, long duration, std::string reason)
2326         {
2327                 if (std::string(source->server) == Srv->GetServerName())
2328                 {
2329                         char type[8];
2330                         snprintf(type,8,"%cLINE",linetype);
2331                         std::string stype = type;
2332                         if (adding)
2333                         {
2334                                 char sduration[MAXBUF];
2335                                 snprintf(sduration,MAXBUF,"%ld",duration);
2336                                 std::deque<std::string> params;
2337                                 params.push_back(host);
2338                                 params.push_back(sduration);
2339                                 params.push_back(":"+reason);
2340                                 DoOneToMany(source->nick,stype,params);
2341                         }
2342                         else
2343                         {
2344                                 std::deque<std::string> params;
2345                                 params.push_back(host);
2346                                 DoOneToMany(source->nick,stype,params);
2347                         }
2348                 }
2349         }
2350
2351         virtual void OnAddGLine(long duration, userrec* source, std::string reason, std::string hostmask)
2352         {
2353                 OnLine(source,hostmask,true,'G',duration,reason);
2354         }
2355
2356         virtual void OnAddZLine(long duration, userrec* source, std::string reason, std::string ipmask)
2357         {
2358                 OnLine(source,ipmask,true,'Z',duration,reason);
2359         }
2360
2361         virtual void OnAddQLine(long duration, userrec* source, std::string reason, std::string nickmask)
2362         {
2363                 OnLine(source,nickmask,true,'Q',duration,reason);
2364         }
2365
2366         virtual void OnAddELine(long duration, userrec* source, std::string reason, std::string hostmask)
2367         {
2368                 OnLine(source,hostmask,true,'E',duration,reason);
2369         }
2370
2371         virtual void OnDelGLine(userrec* source, std::string hostmask)
2372         {
2373                 OnLine(source,hostmask,false,'G',0,"");
2374         }
2375
2376         virtual void OnDelZLine(userrec* source, std::string ipmask)
2377         {
2378                 OnLine(source,ipmask,false,'Z',0,"");
2379         }
2380
2381         virtual void OnDelQLine(userrec* source, std::string nickmask)
2382         {
2383                 OnLine(source,nickmask,false,'Q',0,"");
2384         }
2385
2386         virtual void OnDelELine(userrec* source, std::string hostmask)
2387         {
2388                 OnLine(source,hostmask,false,'E',0,"");
2389         }
2390
2391         virtual void OnMode(userrec* user, void* dest, int target_type, std::string text)
2392         {
2393                 if (std::string(user->server) == Srv->GetServerName())
2394                 {
2395                         if (target_type == TYPE_USER)
2396                         {
2397                                 userrec* u = (userrec*)dest;
2398                                 std::deque<std::string> params;
2399                                 params.push_back(u->nick);
2400                                 params.push_back(text);
2401                                 DoOneToMany(user->nick,"MODE",params);
2402                         }
2403                         else
2404                         {
2405                                 chanrec* c = (chanrec*)dest;
2406                                 std::deque<std::string> params;
2407                                 params.push_back(c->name);
2408                                 params.push_back(text);
2409                                 DoOneToMany(user->nick,"MODE",params);
2410                         }
2411                 }
2412         }
2413
2414         virtual void ProtoSendMode(void* opaque, int target_type, void* target, std::string modeline)
2415         {
2416                 TreeSocket* s = (TreeSocket*)opaque;
2417                 if (target)
2418                 {
2419                         if (target_type == TYPE_USER)
2420                         {
2421                                 userrec* u = (userrec*)target;
2422                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+u->nick+" "+modeline);
2423                         }
2424                         else
2425                         {
2426                                 chanrec* c = (chanrec*)target;
2427                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+modeline);
2428                         }
2429                 }
2430         }
2431
2432         virtual ~ModuleSpanningTree()
2433         {
2434                 delete Srv;
2435         }
2436
2437         virtual Version GetVersion()
2438         {
2439                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
2440         }
2441 };
2442
2443
2444 class ModuleSpanningTreeFactory : public ModuleFactory
2445 {
2446  public:
2447         ModuleSpanningTreeFactory()
2448         {
2449         }
2450
2451         ~ModuleSpanningTreeFactory()
2452         {
2453         }
2454
2455         virtual Module * CreateModule()
2456         {
2457                 TreeProtocolModule = new ModuleSpanningTree;
2458                 return TreeProtocolModule;
2459         }
2460
2461 };
2462
2463
2464 extern "C" void * init_module( void )
2465 {
2466         return new ModuleSpanningTreeFactory;
2467 }