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 using namespace std;
  18
  19 #include <stdio.h>
  20 #include <vector>
  21 #include <deque>
  22 #include "globals.h"
  23 #include "inspircd_config.h"
  24 #ifdef GCC3
  25 #include <ext/hash_map>
  26 #else
  27 #include <hash_map>
  28 #endif
  29 #include "users.h"
  30 #include "channels.h"
  31 #include "modules.h"
  32 #include "socket.h"
  33 #include "helperfuncs.h"
  34 #include "inspircd.h"
  35 #include "inspstring.h"
  36 #include "hashcomp.h"
  37 #include "message.h"
  38
  39 #ifdef GCC3
  40 #define nspace __gnu_cxx
  41 #else
  42 #define nspace std
  43 #endif
  44
  45 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  46
  47 typedef nspace::hash_map<std::string, userrec*, nspace::hash<string>, irc::StrHashComp> user_hash;
  48 typedef nspace::hash_map<std::string, chanrec*, nspace::hash<string>, irc::StrHashComp> chan_hash;
  49
  50 extern user_hash clientlist;
  51 extern chan_hash chanlist;
  52
  53 class TreeServer;
  54 class TreeSocket;
  55
  56 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> params, std::string target);
  57 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> params, std::string omit);
  58 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> params);
  59 bool DoOneToAllButSenderRaw(std::string data,std::string omit);
  60
  61 class TreeServer
  62 {
  63         TreeServer* Parent;
  64         std::vector<TreeServer*> Children;
  65         std::string ServerName;
  66         std::string ServerDesc;
  67         std::string VersionString;
  68         int UserCount;
  69         int OperCount;
  70         TreeSocket* Socket;     // for directly connected servers this points at the socket object
  71
  72  public:
  73
  74         TreeServer()
  75         {
  76                 Parent = NULL;
  77                 ServerName = "";
  78                 ServerDesc = "";
  79                 VersionString = "";
  80                 UserCount = OperCount = 0;
  81         }
  82
  83         TreeServer(std::string Name, std::string Desc) : ServerName(Name), ServerDesc(Desc)
  84         {
  85                 Parent = NULL;
  86                 VersionString = "";
  87                 UserCount = OperCount = 0;
  88         }
  89
  90         TreeServer(std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock) : Parent(Above), ServerName(Name), ServerDesc(Desc), Socket(Sock)
  91         {
  92                 VersionString = "";
  93                 UserCount = OperCount = 0;
  94         }
  95
  96         std::string GetName()
  97         {
  98                 return this->ServerName;
  99         }
 100
 101         std::string GetDesc()
 102         {
 103                 return this->ServerDesc;
 104         }
 105
 106         std::string GetVersion()
 107         {
 108                 return this->VersionString;
 109         }
 110
 111         int GetUserCount()
 112         {
 113                 return this->UserCount;
 114         }
 115
 116         int GetOperCount()
 117         {
 118                 return this->OperCount;
 119         }
 120
 121         TreeSocket* GetSocket()
 122         {
 123                 return this->Socket;
 124         }
 125
 126         TreeServer* GetParent()
 127         {
 128                 return this->Parent;
 129         }
 130
 131         unsigned int ChildCount()
 132         {
 133                 return Children.size();
 134         }
 135
 136         TreeServer* GetChild(unsigned int n)
 137         {
 138                 if (n < Children.size())
 139                 {
 140                         return Children[n];
 141                 }
 142                 else
 143                 {
 144                         return NULL;
 145                 }
 146         }
 147
 148         void AddChild(TreeServer* Child)
 149         {
 150                 Children.push_back(Child);
 151         }
 152
 153         bool DelChild(TreeServer* Child)
 154         {
 155                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 156                 {
 157                         if (*a == Child)
 158                         {
 159                                 Children.erase(a);
 160                                 return true;
 161                         }
 162                 }
 163                 return false;
 164         }
 165
 166         // removes child nodes of this node, and of that node, etc etc
 167         bool Tidy()
 168         {
 169                 bool stillchildren = true;
 170                 while (stillchildren)
 171                 {
 172                         stillchildren = false;
 173                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 174                         {
 175                                 TreeServer* s = (TreeServer*)*a;
 176                                 s->Tidy();
 177                                 Children.erase(a);
 178                                 delete s;
 179                                 stillchildren = true;
 180                                 break;
 181                         }
 182                 }
 183                 return true;
 184         }
 185 };
 186
 187 class Link
 188 {
 189  public:
 190          std::string Name;
 191          std::string IPAddr;
 192          int Port;
 193          std::string SendPass;
 194          std::string RecvPass;
 195 };
 196
 197 /* $ModDesc: Povides a spanning tree server link protocol */
 198
 199 Server *Srv;
 200 ConfigReader *Conf;
 201 TreeServer *TreeRoot;
 202 std::vector<Link> LinkBlocks;
 203
 204 TreeServer* RouteEnumerate(TreeServer* Current, std::string ServerName)
 205 {
 206         if (Current->GetName() == ServerName)
 207                 return Current;
 208         for (unsigned int q = 0; q < Current->ChildCount(); q++)
 209         {
 210                 TreeServer* found = RouteEnumerate(Current->GetChild(q),ServerName);
 211                 if (found)
 212                 {
 213                         return found;
 214                 }
 215         }
 216         return NULL;
 217 }
 218
 219 // Returns the locally connected server we must route a
 220 // message through to reach server 'ServerName'. This
 221 // only applies to one-to-one and not one-to-many routing.
 222 TreeServer* BestRouteTo(std::string ServerName)
 223 {
 224         log(DEBUG,"Finding best route to %s",ServerName.c_str());
 225         // first, find the server by recursively walking the tree
 226         TreeServer* Found = RouteEnumerate(TreeRoot,ServerName);
 227         // did we find it? If not, they did something wrong, abort.
 228         if (!Found)
 229         {
 230                 log(DEBUG,"Failed to find %s by walking tree!",ServerName.c_str());
 231                 return NULL;
 232         }
 233         else
 234         {
 235                 // The server exists, follow its parent nodes until
 236                 // the parent of the current is 'TreeRoot', we know
 237                 // then that this is a directly-connected server.
 238                 while ((Found) && (Found->GetParent() != TreeRoot))
 239                 {
 240                         Found = Found->GetParent();
 241                 }
 242                 log(DEBUG,"Route to %s is via %s",ServerName.c_str(),Found->GetName().c_str());
 243                 return Found;
 244         }
 245 }
 246
 247 bool LookForServer(TreeServer* Current, std::string ServerName)
 248 {
 249         if (ServerName == Current->GetName())
 250                 return true;
 251         for (unsigned int q = 0; q < Current->ChildCount(); q++)
 252         {
 253                 if (LookForServer(Current->GetChild(q),ServerName))
 254                         return true;
 255         }
 256         return false;
 257 }
 258
 259 TreeServer* Found;
 260
 261 void RFindServer(TreeServer* Current, std::string ServerName)
 262 {
 263         if ((ServerName == Current->GetName()) && (!Found))
 264         {
 265                 Found = Current;
 266                 log(DEBUG,"Found server %s desc %s",Current->GetName().c_str(),Current->GetDesc().c_str());
 267                 return;
 268         }
 269         if (!Found)
 270         {
 271                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 272                 {
 273                         if (!Found)
 274                                 RFindServer(Current->GetChild(q),ServerName);
 275                 }
 276         }
 277         return;
 278 }
 279
 280 TreeServer* FindServer(std::string ServerName)
 281 {
 282         Found = NULL;
 283         RFindServer(TreeRoot,ServerName);
 284         return Found;
 285 }
 286
 287 bool IsServer(std::string ServerName)
 288 {
 289         return LookForServer(TreeRoot,ServerName);
 290 }
 291
 292 class TreeSocket : public InspSocket
 293 {
 294         std::string myhost;
 295         std::string in_buffer;
 296         ServerState LinkState;
 297         std::string InboundServerName;
 298         std::string InboundDescription;
 299         int num_lost_users;
 300         int num_lost_servers;
 301
 302  public:
 303
 304         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime)
 305                 : InspSocket(host, port, listening, maxtime)
 306         {
 307                 Srv->Log(DEBUG,"Create new listening");
 308                 myhost = host;
 309                 this->LinkState = LISTENER;
 310         }
 311
 312         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 313                 : InspSocket(host, port, listening, maxtime)
 314         {
 315                 Srv->Log(DEBUG,"Create new outbound");
 316                 myhost = ServerName;
 317                 this->LinkState = CONNECTING;
 318         }
 319
 320         TreeSocket(int newfd, char* ip)
 321                 : InspSocket(newfd, ip)
 322         {
 323                 Srv->Log(DEBUG,"Associate new inbound");
 324                 this->LinkState = WAIT_AUTH_1;
 325         }
 326
 327         virtual bool OnConnected()
 328         {
 329                 if (this->LinkState == CONNECTING)
 330                 {
 331                         Srv->SendOpers("*** Connection to "+myhost+"["+this->GetIP()+"] established.");
 332                         // we should send our details here.
 333                         // if the other side is satisfied, they send theirs.
 334                         // we do not need to change state here.
 335                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 336                         {
 337                                 if (x->Name == this->myhost)
 338                                 {
 339                                         // found who we're supposed to be connecting to, send the neccessary gubbins.
 340                                         this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 341                                         return true;
 342                                 }
 343                         }
 344                 }
 345                 log(DEBUG,"Outbound connection ERROR: Could not find the right link block!");
 346                 return true;
 347         }
 348
 349         virtual void OnError(InspSocketError e)
 350         {
 351         }
 352
 353         virtual int OnDisconnect()
 354         {
 355                 return true;
 356         }
 357
 358         // recursively send the server tree with distances as hops
 359         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 360         {
 361                 char command[1024];
 362                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 363                 {
 364                         TreeServer* recursive_server = Current->GetChild(q);
 365                         if (recursive_server != s)
 366                         {
 367                                 // :source.server SERVER server.name hops :Description
 368                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 369                                 this->WriteLine(command);
 370                                 // down to next level
 371                                 this->SendServers(recursive_server, s, hops+1);
 372                         }
 373                 }
 374         }
 375
 376         void SquitServer(TreeServer* Current)
 377         {
 378                 // recursively squit the servers attached to 'Current'
 379                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 380                 {
 381                         TreeServer* recursive_server = Current->GetChild(q);
 382                         this->SquitServer(recursive_server);
 383                 }
 384                 // Now we've whacked the kids, whack self
 385                 log(DEBUG,"Deleted %s",Current->GetName().c_str());
 386                 num_lost_servers++;
 387                 bool quittingpeople = true;
 388                 while (quittingpeople)
 389                 {
 390                         quittingpeople = false;
 391                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 392                         {
 393                                 if (!strcasecmp(u->second->server,Current->GetName().c_str()))
 394                                 {
 395                                         log(DEBUG,"Quitting user %s of server %s",u->second->nick,u->second->server);
 396                                         Srv->QuitUser(u->second,Current->GetName()+" "+std::string(Srv->GetServerName()));
 397                                         num_lost_users++;
 398                                         quittingpeople = true;
 399                                         break;
 400                                 }
 401                         }
 402                 }
 403         }
 404
 405         void Squit(TreeServer* Current,std::string reason)
 406         {
 407                 if (Current)
 408                 {
 409                         std::deque<std::string> params;
 410                         params.push_back(Current->GetName());
 411                         params.push_back(":"+reason);
 412                         DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
 413                         if (Current->GetParent() == TreeRoot)
 414                         {
 415                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
 416                         }
 417                         else
 418                         {
 419                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
 420                         }
 421                         num_lost_servers = 0;
 422                         num_lost_users = 0;
 423                         SquitServer(Current);
 424                         Current->Tidy();
 425                         Current->GetParent()->DelChild(Current);
 426                         delete Current;
 427                         WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
 428                 }
 429                 else
 430                 {
 431                         log(DEBUG,"Squit from unknown server");
 432                 }
 433         }
 434
 435         bool ForceMode(std::string source, std::deque<std::string> params)
 436         {
 437                 userrec* who = new userrec;
 438                 who->fd = FD_MAGIC_NUMBER;
 439                 if (params.size() < 2)
 440                         return true;
 441                 char* modelist[255];
 442                 for (unsigned int q = 0; q < params.size(); q++)
 443                 {
 444                         modelist[q] = (char*)params[q].c_str();
 445                 }
 446                 Srv->SendMode(modelist,params.size(),who);
 447                 DoOneToAllButSender(source,"FMODE",params,source);
 448                 delete who;
 449                 return true;
 450         }
 451
 452         bool ForceJoin(std::string source, std::deque<std::string> params)
 453         {
 454                 if (params.size() < 1)
 455                         return true;
 456                 for (unsigned int channelnum = 0; channelnum < params.size(); channelnum++)
 457                 {
 458                         // process one channel at a time, applying modes.
 459                         char* channel = (char*)params[channelnum].c_str();
 460                         char permissions = *channel;
 461                         char* mode = NULL;
 462                         switch (permissions)
 463                         {
 464                                 case '@':
 465                                         channel++;
 466                                         mode = "+o";
 467                                 break;
 468                                 case '%':
 469                                         channel++;
 470                                         mode = "+h";
 471                                 break;
 472                                 case '+':
 473                                         channel++;
 474                                         mode = "+v";
 475                                 break;
 476                         }
 477                         userrec* who = Srv->FindNick(source);
 478                         if (who)
 479                         {
 480                                 char* key = "";
 481                                 chanrec* chan = Srv->FindChannel(channel);
 482                                 if ((chan) && (*chan->key))
 483                                 {
 484                                         key = chan->key;
 485                                 }
 486                                 Srv->JoinUserToChannel(who,channel,key);
 487                                 if (mode)
 488                                 {
 489                                         char* modelist[3];
 490                                         modelist[0] = channel;
 491                                         modelist[1] = mode;
 492                                         modelist[2] = who->nick;
 493                                         Srv->SendMode(modelist,3,who);
 494                                 }
 495                                 DoOneToAllButSender(source,"FJOIN",params,who->server);
 496                         }
 497                 }
 498                 return true;
 499         }
 500
 501         bool IntroduceClient(std::string source, std::deque<std::string> params)
 502         {
 503                 if (params.size() < 8)
 504                         return true;
 505                 // NICK age nick host dhost ident +modes ip :gecos
 506                 //       0   1    2    3      4     5    6   7
 507                 std::string nick = params[1];
 508                 std::string host = params[2];
 509                 std::string dhost = params[3];
 510                 std::string ident = params[4];
 511                 time_t age = atoi(params[0].c_str());
 512                 std::string modes = params[5];
 513                 if (*(modes.c_str()) == '+')
 514                 {
 515                         char* m = (char*)modes.c_str();
 516                         m++;
 517                         modes = m;
 518                 }
 519                 std::string ip = params[6];
 520                 std::string gecos = params[7];
 521                 char* tempnick = (char*)nick.c_str();
 522                 log(DEBUG,"Introduce client %s!%s@%s",tempnick,ident.c_str(),host.c_str());
 523
 524                 user_hash::iterator iter;
 525                 iter = clientlist.find(tempnick);
 526                 if (iter != clientlist.end())
 527                 {
 528                         // nick collision
 529                         log(DEBUG,"Nick collision on %s!%s@%s",tempnick,ident.c_str(),host.c_str());
 530                         return true;
 531                 }
 532
 533                 clientlist[tempnick] = new userrec();
 534                 clientlist[tempnick]->fd = FD_MAGIC_NUMBER;
 535                 strlcpy(clientlist[tempnick]->nick, tempnick,NICKMAX);
 536                 strlcpy(clientlist[tempnick]->host, host.c_str(),160);
 537                 strlcpy(clientlist[tempnick]->dhost, dhost.c_str(),160);
 538                 clientlist[tempnick]->server = (char*)FindServerNamePtr(source.c_str());
 539                 strlcpy(clientlist[tempnick]->ident, ident.c_str(),IDENTMAX);
 540                 strlcpy(clientlist[tempnick]->fullname, gecos.c_str(),MAXGECOS);
 541                 clientlist[tempnick]->registered = 7;
 542                 clientlist[tempnick]->signon = age;
 543                 strlcpy(clientlist[tempnick]->ip,ip.c_str(),16);
 544                 for (int i = 0; i < MAXCHANS; i++)
 545                 {
 546                         clientlist[tempnick]->chans[i].channel = NULL;
 547                         clientlist[tempnick]->chans[i].uc_modes = 0;
 548                 }
 549                 params[7] = ":" + params[7];
 550                 DoOneToAllButSender(source,"NICK",params,source);
 551                 return true;
 552         }
 553
 554         void SendChannelModes(TreeServer* Current)
 555         {
 556                 char data[MAXBUF];
 557                 for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 558                 {
 559                         snprintf(data,MAXBUF,":%s FMODE %s +%s",Srv->GetServerName().c_str(),c->second->name,chanmodes(c->second));
 560                         this->WriteLine(data);
 561                         if (*c->second->topic)
 562                         {
 563                                 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);
 564                                 this->WriteLine(data);
 565                         }
 566                         for (BanList::iterator b = c->second->bans.begin(); b != c->second->bans.end(); b++)
 567                         {
 568                                 snprintf(data,MAXBUF,":%s FMODE %s +b %s",Srv->GetServerName().c_str(),c->second->name,b->data);
 569                                 this->WriteLine(data);
 570                         }
 571                 }
 572         }
 573
 574         // send all users and their channels
 575         void SendUsers(TreeServer* Current)
 576         {
 577                 char data[MAXBUF];
 578                 for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 579                 {
 580                         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);
 581                         this->WriteLine(data);
 582                         if (strchr(u->second->modes,'o'))
 583                         {
 584                                 this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
 585                         }
 586                         char* chl = chlist(u->second,u->second);
 587                         if (*chl)
 588                         {
 589                                 this->WriteLine(":"+std::string(u->second->nick)+" FJOIN "+std::string(chl));
 590                         }
 591                 }
 592         }
 593
 594         void DoBurst(TreeServer* s)
 595         {
 596                 log(DEBUG,"Beginning network burst");
 597                 Srv->SendOpers("*** Bursting to "+s->GetName()+".");
 598                 this->WriteLine("BURST");
 599                 // Send server tree
 600                 this->SendServers(TreeRoot,s,1);
 601                 // Send users and their channels
 602                 this->SendUsers(s);
 603                 // TODO: Send everything else (channel modes etc)
 604                 this->SendChannelModes(s);
 605                 this->WriteLine("ENDBURST");
 606         }
 607
 608         virtual bool OnDataReady()
 609         {
 610                 char* data = this->Read();
 611                 if (data)
 612                 {
 613                         this->in_buffer += data;
 614                         while (in_buffer.find("\n") != std::string::npos)
 615                         {
 616                                 char* line = (char*)in_buffer.c_str();
 617                                 std::string ret = "";
 618                                 while ((*line != '\n') && (strlen(line)))
 619                                 {
 620                                         ret = ret + *line;
 621                                         line++;
 622                                 }
 623                                 if ((*line == '\n') || (*line == '\r'))
 624                                         line++;
 625                                 in_buffer = line;
 626                                 if (!this->ProcessLine(ret))
 627                                 {
 628                                         return false;
 629                                 }
 630                         }
 631                 }
 632                 return (data != NULL);
 633         }
 634
 635         int WriteLine(std::string line)
 636         {
 637                 return this->Write(line + "\r\n");
 638         }
 639
 640         bool Error(std::deque<std::string> params)
 641         {
 642                 if (params.size() < 1)
 643                         return false;
 644                 std::string Errmsg = params[0];
 645                 std::string SName = myhost;
 646                 if (InboundServerName != "")
 647                 {
 648                         SName = InboundServerName;
 649                 }
 650                 Srv->SendOpers("*** ERROR from "+SName+": "+Errmsg);
 651                 // we will return false to cause the socket to close.
 652                 return false;
 653         }
 654
 655         bool OperType(std::string prefix, std::deque<std::string> params)
 656         {
 657                 if (params.size() != 1)
 658                         return true;
 659                 std::string opertype = params[0];
 660                 userrec* u = Srv->FindNick(prefix);
 661                 if (u)
 662                 {
 663                         strlcpy(u->oper,opertype.c_str(),NICKMAX);
 664                         if (!strchr(u->modes,'o'))
 665                         {
 666                                 strcat(u->modes,"o");
 667                         }
 668                         DoOneToAllButSender(u->server,"OPERTYPE",params,u->server);
 669                 }
 670                 return true;
 671         }
 672
 673         bool RemoteKill(std::string prefix, std::deque<std::string> params)
 674         {
 675                 if (params.size() != 2)
 676                         return true;
 677                 std::string nick = params[0];
 678                 std::string reason = params[1];
 679                 userrec* u = Srv->FindNick(prefix);
 680                 userrec* who = Srv->FindNick(nick);
 681                 if (who)
 682                 {
 683                         std::string sourceserv = prefix;
 684                         if (u)
 685                         {
 686                                 sourceserv = u->server;
 687                         }
 688                         params[1] = ":" + params[1];
 689                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
 690                         Srv->QuitUser(who,reason);
 691                 }
 692                 return true;
 693         }
 694
 695         bool RemoteServer(std::string prefix, std::deque<std::string> params)
 696         {
 697                 if (params.size() < 4)
 698                         return false;
 699                 std::string servername = params[0];
 700                 std::string password = params[1];
 701                 int hops = atoi(params[2].c_str());
 702                 std::string description = params[3];
 703                 if (!hops)
 704                 {
 705                         this->WriteLine("ERROR :Protocol error - Introduced remote server with incorrect hopcount!");
 706                         return false;
 707                 }
 708                 TreeServer* ParentOfThis = FindServer(prefix);
 709                 if (!ParentOfThis)
 710                 {
 711                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
 712                         return false;
 713                 }
 714                 TreeServer* Node = new TreeServer(servername,description,ParentOfThis,NULL);
 715                 ParentOfThis->AddChild(Node);
 716                 params[3] = ":" + params[3];
 717                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
 718                 Srv->SendOpers("*** Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
 719                 return true;
 720         }
 721
 722         bool Outbound_Reply_Server(std::deque<std::string> params)
 723         {
 724                 if (params.size() < 4)
 725                         return false;
 726                 std::string servername = params[0];
 727                 std::string password = params[1];
 728                 int hops = atoi(params[2].c_str());
 729                 if (hops)
 730                 {
 731                         this->WriteLine("ERROR :Server too far away for authentication");
 732                         return false;
 733                 }
 734                 std::string description = params[3];
 735                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 736                 {
 737                         if ((x->Name == servername) && (x->RecvPass == password))
 738                         {
 739                                 // Begin the sync here. this kickstarts the
 740                                 // other side, waiting in WAIT_AUTH_2 state,
 741                                 // into starting their burst, as it shows
 742                                 // that we're happy.
 743                                 this->LinkState = CONNECTED;
 744                                 // we should add the details of this server now
 745                                 // to the servers tree, as a child of the root
 746                                 // node.
 747                                 TreeServer* Node = new TreeServer(servername,description,TreeRoot,this);
 748                                 TreeRoot->AddChild(Node);
 749                                 params[3] = ":" + params[3];
 750                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,servername);
 751                                 this->DoBurst(Node);
 752                                 return true;
 753                         }
 754                 }
 755                 this->WriteLine("ERROR :Invalid credentials");
 756                 return false;
 757         }
 758
 759         bool Inbound_Server(std::deque<std::string> params)
 760         {
 761                 if (params.size() < 4)
 762                         return false;
 763                 std::string servername = params[0];
 764                 std::string password = params[1];
 765                 int hops = atoi(params[2].c_str());
 766                 if (hops)
 767                 {
 768                         this->WriteLine("ERROR :Server too far away for authentication");
 769                         return false;
 770                 }
 771                 std::string description = params[3];
 772                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 773                 {
 774                         if ((x->Name == servername) && (x->RecvPass == password))
 775                         {
 776                                 Srv->SendOpers("*** Verified incoming server connection from \002"+servername+"\002["+this->GetIP()+"] ("+description+")");
 777                                 this->InboundServerName = servername;
 778                                 this->InboundDescription = description;
 779                                 // this is good. Send our details: Our server name and description and hopcount of 0,
 780                                 // along with the sendpass from this block.
 781                                 this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 782                                 // move to the next state, we are now waiting for THEM.
 783                                 this->LinkState = WAIT_AUTH_2;
 784                                 return true;
 785                         }
 786                 }
 787                 this->WriteLine("ERROR :Invalid credentials");
 788                 return false;
 789         }
 790
 791         std::deque<std::string> Split(std::string line, bool stripcolon)
 792         {
 793                 std::deque<std::string> n;
 794                 std::stringstream s(line);
 795                 std::string param = "";
 796                 n.clear();
 797                 int item = 0;
 798                 while (!s.eof())
 799                 {
 800                         s >> param;
 801                         if ((param != "") && (param != "\n"))
 802                         {
 803                                 if ((param.c_str()[0] == ':') && (item))
 804                                 {
 805                                         char* str = (char*)param.c_str();
 806                                         str++;
 807                                         param = str;
 808                                         std::string append;
 809                                         while (!s.eof())
 810                                         {
 811                                                 append = "";
 812                                                 s >> append;
 813                                                 if (append != "")
 814                                                 {
 815                                                         param = param + " " + append;
 816                                                 }
 817                                         }
 818                                 }
 819                                 item++;
 820                                 n.push_back(param);
 821                         }
 822                 }
 823                 return n;
 824         }
 825
 826         bool ProcessLine(std::string line)
 827         {
 828                 char* l = (char*)line.c_str();
 829                 while ((strlen(l)) && (l[strlen(l)-1] == '\r') || (l[strlen(l)-1] == '\n'))
 830                         l[strlen(l)-1] = '\0';
 831                 line = l;
 832                 if (line == "")
 833                         return true;
 834                 Srv->Log(DEBUG,"inbound-line: '"+line+"'");
 835                 std::deque<std::string> params = this->Split(line,true);
 836                 std::string command = "";
 837                 std::string prefix = "";
 838                 if (((params[0].c_str())[0] == ':') && (params.size() > 1))
 839                 {
 840                         prefix = params[0];
 841                         command = params[1];
 842                         char* pref = (char*)prefix.c_str();
 843                         prefix = ++pref;
 844                         params.pop_front();
 845                         params.pop_front();
 846                 }
 847                 else
 848                 {
 849                         prefix = "";
 850                         command = params[0];
 851                         params.pop_front();
 852                 }
 853
 854                 switch (this->LinkState)
 855                 {
 856                         TreeServer* Node;
 857
 858                         case WAIT_AUTH_1:
 859                                 // Waiting for SERVER command from remote server. Server initiating
 860                                 // the connection sends the first SERVER command, listening server
 861                                 // replies with theirs if its happy, then if the initiator is happy,
 862                                 // it starts to send its net sync, which starts the merge, otherwise
 863                                 // it sends an ERROR.
 864                                 if (command == "SERVER")
 865                                 {
 866                                         return this->Inbound_Server(params);
 867                                 }
 868                                 else if (command == "ERROR")
 869                                 {
 870                                         return this->Error(params);
 871                                 }
 872                         break;
 873                         case WAIT_AUTH_2:
 874                                 // Waiting for start of other side's netmerge to say they liked our
 875                                 // password.
 876                                 if (command == "SERVER")
 877                                 {
 878                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
 879                                         // silently ignore.
 880                                         return true;
 881                                 }
 882                                 else if (command == "BURST")
 883                                 {
 884                                         this->LinkState = CONNECTED;
 885                                         Node = new TreeServer(InboundServerName,InboundDescription,TreeRoot,this);
 886                                         TreeRoot->AddChild(Node);
 887                                         params.clear();
 888                                         params.push_back(InboundServerName);
 889                                         params.push_back("*");
 890                                         params.push_back("1");
 891                                         params.push_back(":"+InboundDescription);
 892                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
 893                                         this->DoBurst(Node);
 894                                 }
 895                                 else if (command == "ERROR")
 896                                 {
 897                                         return this->Error(params);
 898                                 }
 899
 900                         break;
 901                         case LISTENER:
 902                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
 903                                 return false;
 904                         break;
 905                         case CONNECTING:
 906                                 if (command == "SERVER")
 907                                 {
 908                                         // another server we connected to, which was in WAIT_AUTH_1 state,
 909                                         // has just sent us their credentials. If we get this far, theyre
 910                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
 911                                         // if we're happy with this, we should send our netburst which
 912                                         // kickstarts the merge.
 913                                         return this->Outbound_Reply_Server(params);
 914                                 }
 915                         break;
 916                         case CONNECTED:
 917                                 // This is the 'authenticated' state, when all passwords
 918                                 // have been exchanged and anything past this point is taken
 919                                 // as gospel.
 920                                 std::string target = "";
 921                                 if ((command == "NICK") && (params.size() > 1))
 922                                 {
 923                                         return this->IntroduceClient(prefix,params);
 924                                 }
 925                                 else if (command == "FJOIN")
 926                                 {
 927                                         return this->ForceJoin(prefix,params);
 928                                 }
 929                                 else if (command == "SERVER")
 930                                 {
 931                                         return this->RemoteServer(prefix,params);
 932                                 }
 933                                 else if (command == "OPERTYPE")
 934                                 {
 935                                         return this->OperType(prefix,params);
 936                                 }
 937                                 else if (command == "FMODE")
 938                                 {
 939                                         return this->ForceMode(prefix,params);
 940                                 }
 941                                 else if (command == "KILL")
 942                                 {
 943                                         return this->RemoteKill(prefix,params);
 944                                 }
 945                                 else if (command == "SQUIT")
 946                                 {
 947                                         if (params.size() == 2)
 948                                         {
 949                                                 this->Squit(FindServer(params[0]),params[1]);
 950                                         }
 951                                         return true;
 952                                 }
 953                                 else
 954                                 {
 955                                         // not a special inter-server command.
 956                                         // Emulate the actual user doing the command,
 957                                         // this saves us having a huge ugly parser.
 958                                         userrec* who = Srv->FindNick(prefix);
 959                                         std::string sourceserv = this->myhost;
 960                                         if (this->InboundServerName != "")
 961                                         {
 962                                                 sourceserv = this->InboundServerName;
 963                                         }
 964                                         if (who)
 965                                         {
 966                                                 // its a user
 967                                                 target = who->server;
 968                                                 char* strparams[127];
 969                                                 for (unsigned int q = 0; q < params.size(); q++)
 970                                                 {
 971                                                         strparams[q] = (char*)params[q].c_str();
 972                                                 }
 973                                                 log(DEBUG,"*** CALL COMMAND HANDLER FOR %s, SOURCE: '%s'",command.c_str(),who->nick);
 974                                                 Srv->CallCommandHandler(command, strparams, params.size(), who);
 975                                         }
 976                                         else
 977                                         {
 978                                                 // its not a user. Its either a server, or somethings screwed up.
 979                                                 if (IsServer(prefix))
 980                                                 {
 981                                                         target = Srv->GetServerName();
 982                                                 }
 983                                                 else
 984                                                 {
 985                                                         log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
 986                                                         return true;
 987                                                 }
 988                                         }
 989                                         return DoOneToAllButSenderRaw(line,sourceserv);
 990
 991                                 }
 992                                 return true;
 993                         break;
 994                 }
 995                 return true;
 996         }
 997
 998         virtual void OnTimeout()
 999         {
1000                 if (this->LinkState == CONNECTING)
1001                 {
1002                         Srv->SendOpers("*** CONNECT: Connection to \002"+myhost+"\002 timed out.");
1003                 }
1004         }
1005
1006         virtual void OnClose()
1007         {
1008                 // Connection closed.
1009                 // If the connection is fully up (state CONNECTED)
1010                 // then propogate a netsplit to all peers.
1011                 std::string quitserver = this->myhost;
1012                 if (this->InboundServerName != "")
1013                 {
1014                         quitserver = this->InboundServerName;
1015                 }
1016                 TreeServer* s = FindServer(quitserver);
1017                 if (s)
1018                 {
1019                         Squit(s,"Remote host closed the connection");
1020                 }
1021         }
1022
1023         virtual int OnIncomingConnection(int newsock, char* ip)
1024         {
1025                 TreeSocket* s = new TreeSocket(newsock, ip);
1026                 Srv->AddSocket(s);
1027                 return true;
1028         }
1029 };
1030
1031 bool DoOneToAllButSenderRaw(std::string data,std::string omit)
1032 {
1033         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1034         {
1035                 TreeServer* Route = TreeRoot->GetChild(x);
1036                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (BestRouteTo(omit) != Route))
1037                 {
1038                         TreeSocket* Sock = Route->GetSocket();
1039                         log(DEBUG,"Sending RAW to %s",Route->GetName().c_str());
1040                         Sock->WriteLine(data);
1041                 }
1042         }
1043         return true;
1044 }
1045
1046 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> params, std::string omit)
1047 {
1048         log(DEBUG,"ALLBUTONE: Comes from %s SHOULD NOT go back to %s",prefix.c_str(),omit.c_str());
1049         // TODO: Special stuff with privmsg and notice
1050         std::string FullLine = ":" + prefix + " " + command;
1051         for (unsigned int x = 0; x < params.size(); x++)
1052         {
1053                 FullLine = FullLine + " " + params[x];
1054         }
1055         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1056         {
1057                 TreeServer* Route = TreeRoot->GetChild(x);
1058                 // Send the line IF:
1059                 // The route has a socket (its a direct connection)
1060                 // The route isnt the one to be omitted
1061                 // The route isnt the path to the one to be omitted
1062                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (BestRouteTo(omit) != Route))
1063                 {
1064                         TreeSocket* Sock = Route->GetSocket();
1065                         log(DEBUG,"Sending to %s",Route->GetName().c_str());
1066                         Sock->WriteLine(FullLine);
1067                 }
1068         }
1069         return true;
1070 }
1071
1072 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> params)
1073 {
1074         std::string FullLine = ":" + prefix + " " + command;
1075         for (unsigned int x = 0; x < params.size(); x++)
1076         {
1077                 FullLine = FullLine + " " + params[x];
1078         }
1079         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1080         {
1081                 TreeServer* Route = TreeRoot->GetChild(x);
1082                 if (Route->GetSocket())
1083                 {
1084                         TreeSocket* Sock = Route->GetSocket();
1085                         Sock->WriteLine(FullLine);
1086                 }
1087         }
1088         return true;
1089 }
1090
1091 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> params, std::string target)
1092 {
1093         TreeServer* Route = BestRouteTo(target);
1094         if (Route)
1095         {
1096                 std::string FullLine = ":" + prefix + " " + command;
1097                 for (unsigned int x = 0; x < params.size(); x++)
1098                 {
1099                         FullLine = FullLine + " " + params[x];
1100                 }
1101                 if (Route->GetSocket())
1102                 {
1103                         TreeSocket* Sock = Route->GetSocket();
1104                         Sock->WriteLine(FullLine);
1105                 }
1106                 return true;
1107         }
1108         else
1109         {
1110                 log(DEBUG,"Could not route message with target %s: %s",target.c_str(),command.c_str());
1111                 return true;
1112         }
1113 }
1114
1115
1116 class ModuleSpanningTree : public Module
1117 {
1118         std::vector<TreeSocket*> Bindings;
1119         int line;
1120
1121  public:
1122
1123         void ReadConfiguration(bool rebind)
1124         {
1125                 if (rebind)
1126                 {
1127                         for (int j =0; j < Conf->Enumerate("bind"); j++)
1128                         {
1129                                 std::string Type = Conf->ReadValue("bind","type",j);
1130                                 std::string IP = Conf->ReadValue("bind","address",j);
1131                                 long Port = Conf->ReadInteger("bind","port",j,true);
1132                                 if (Type == "servers")
1133                                 {
1134                                         if (IP == "*")
1135                                         {
1136                                                 IP = "";
1137                                         }
1138                                         TreeSocket* listener = new TreeSocket(IP.c_str(),Port,true,10);
1139                                         if (listener->GetState() == I_LISTENING)
1140                                         {
1141                                                 Srv->AddSocket(listener);
1142                                                 Bindings.push_back(listener);
1143                                         }
1144                                         else
1145                                         {
1146                                                 log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
1147                                                 listener->Close();
1148                                                 delete listener;
1149                                         }
1150                                 }
1151                         }
1152                 }
1153                 LinkBlocks.clear();
1154                 for (int j =0; j < Conf->Enumerate("link"); j++)
1155                 {
1156                         Link L;
1157                         L.Name = Conf->ReadValue("link","name",j);
1158                         L.IPAddr = Conf->ReadValue("link","ipaddr",j);
1159                         L.Port = Conf->ReadInteger("link","port",j,true);
1160                         L.SendPass = Conf->ReadValue("link","sendpass",j);
1161                         L.RecvPass = Conf->ReadValue("link","recvpass",j);
1162                         LinkBlocks.push_back(L);
1163                         log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
1164                 }
1165         }
1166
1167         ModuleSpanningTree()
1168         {
1169                 Srv = new Server;
1170                 Conf = new ConfigReader;
1171                 Bindings.clear();
1172
1173                 // Create the root of the tree
1174                 TreeRoot = new TreeServer(Srv->GetServerName(),Srv->GetServerDescription());
1175
1176                 ReadConfiguration(true);
1177         }
1178
1179         void ShowLinks(TreeServer* Current, userrec* user, int hops)
1180         {
1181                 std::string Parent = TreeRoot->GetName();
1182                 if (Current->GetParent())
1183                 {
1184                         Parent = Current->GetParent()->GetName();
1185                 }
1186                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1187                 {
1188                         ShowLinks(Current->GetChild(q),user,hops+1);
1189                 }
1190                 WriteServ(user->fd,"364 %s %s %s :%d %s",user->nick,Current->GetName().c_str(),Parent.c_str(),hops,Current->GetDesc().c_str());
1191         }
1192
1193         void HandleLinks(char** parameters, int pcnt, userrec* user)
1194         {
1195                 ShowLinks(TreeRoot,user,0);
1196                 WriteServ(user->fd,"365 %s * :End of /LINKS list.",user->nick);
1197                 return;
1198         }
1199
1200         void HandleLusers(char** parameters, int pcnt, userrec* user)
1201         {
1202                 return;
1203         }
1204
1205         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
1206
1207         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80])
1208         {
1209                 if (line < 128)
1210                 {
1211                         for (int t = 0; t < depth; t++)
1212                         {
1213                                 matrix[line][t] = ' ';
1214                         }
1215                         strlcpy(&matrix[line][depth],Current->GetName().c_str(),80);
1216                         line++;
1217                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
1218                         {
1219                                 ShowMap(Current->GetChild(q),user,depth+2,matrix);
1220                         }
1221                 }
1222         }
1223
1224         // Ok, prepare to be confused.
1225         // After much mulling over how to approach this, it struck me that
1226         // the 'usual' way of doing a /MAP isnt the best way. Instead of
1227         // keeping track of a ton of ascii characters, and line by line
1228         // under recursion working out where to place them using multiplications
1229         // and divisons, we instead render the map onto a backplane of characters
1230         // (a character matrix), then draw the branches as a series of "L" shapes
1231         // from the nodes. This is not only friendlier on CPU it uses less stack.
1232
1233         void HandleMap(char** parameters, int pcnt, userrec* user)
1234         {
1235                 // This array represents a virtual screen which we will
1236                 // "scratch" draw to, as the console device of an irc
1237                 // client does not provide for a proper terminal.
1238                 char matrix[128][80];
1239                 for (unsigned int t = 0; t < 128; t++)
1240                 {
1241                         matrix[t][0] = '\0';
1242                 }
1243                 line = 0;
1244                 // The only recursive bit is called here.
1245                 ShowMap(TreeRoot,user,0,matrix);
1246                 // Process each line one by one. The algorithm has a limit of
1247                 // 128 servers (which is far more than a spanning tree should have
1248                 // anyway, so we're ok). This limit can be raised simply by making
1249                 // the character matrix deeper, 128 rows taking 10k of memory.
1250                 for (int l = 1; l < line; l++)
1251                 {
1252                         // scan across the line looking for the start of the
1253                         // servername (the recursive part of the algorithm has placed
1254                         // the servers at indented positions depending on what they
1255                         // are related to)
1256                         int first_nonspace = 0;
1257                         while (matrix[l][first_nonspace] == ' ')
1258                         {
1259                                 first_nonspace++;
1260                         }
1261                         first_nonspace--;
1262                         // Draw the `- (corner) section: this may be overwritten by
1263                         // another L shape passing along the same vertical pane, becoming
1264                         // a |- (branch) section instead.
1265                         matrix[l][first_nonspace] = '-';
1266                         matrix[l][first_nonspace-1] = '`';
1267                         int l2 = l - 1;
1268                         // Draw upwards until we hit the parent server, causing possibly
1269                         // other corners (`-) to become branches (|-)
1270                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
1271                         {
1272                                 matrix[l2][first_nonspace-1] = '|';
1273                                 l2--;
1274                         }
1275                 }
1276                 // dump the whole lot to the user. This is the easy bit, honest.
1277                 for (int t = 0; t < line; t++)
1278                 {
1279                         WriteServ(user->fd,"006 %s :%s",user->nick,&matrix[t][0]);
1280                 }
1281                 WriteServ(user->fd,"007 %s :End of /MAP",user->nick);
1282                 return;
1283         }
1284
1285         int HandleSquit(char** parameters, int pcnt, userrec* user)
1286         {
1287                 return 1;
1288         }
1289
1290         int HandleConnect(char** parameters, int pcnt, userrec* user)
1291         {
1292                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
1293                 {
1294                         if (Srv->MatchText(x->Name.c_str(),parameters[0]))
1295                         {
1296                                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: Connecting to server: %s (%s:%d)",user->nick,x->Name.c_str(),x->IPAddr.c_str(),x->Port);
1297                                 TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name);
1298                                 Srv->AddSocket(newsocket);
1299                                 return 1;
1300                         }
1301                 }
1302                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: No matching server could be found in the config file.",user->nick);
1303                 return 1;
1304         }
1305
1306         virtual int OnPreCommand(std::string command, char **parameters, int pcnt, userrec *user)
1307         {
1308                 if (command == "CONNECT")
1309                 {
1310                         return this->HandleConnect(parameters,pcnt,user);
1311                 }
1312                 else if (command == "SQUIT")
1313                 {
1314                         return this->HandleSquit(parameters,pcnt,user);
1315                 }
1316                 else if (command == "MAP")
1317                 {
1318                         this->HandleMap(parameters,pcnt,user);
1319                         return 1;
1320                 }
1321                 else if (command == "LUSERS")
1322                 {
1323                         this->HandleLusers(parameters,pcnt,user);
1324                         return 1;
1325                 }
1326                 else if (command == "LINKS")
1327                 {
1328                         this->HandleLinks(parameters,pcnt,user);
1329                         return 1;
1330                 }
1331                 return 0;
1332         }
1333
1334         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
1335         {
1336                 if (std::string(source->server) == Srv->GetServerName())
1337                 {
1338                         std::deque<std::string> params;
1339                         params.push_back(dest->nick);
1340                         params.push_back(channel->name);
1341                         DoOneToMany(source->nick,"INVITE",params);
1342                 }
1343         }
1344
1345         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, std::string topic)
1346         {
1347         }
1348
1349         virtual void OnUserNotice(userrec* user, void* dest, int target_type, std::string text)
1350         {
1351                 if (target_type == TYPE_USER)
1352                 {
1353                         userrec* d = (userrec*)dest;
1354                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
1355                         {
1356                                 std::deque<std::string> params;
1357                                 params.clear();
1358                                 params.push_back(d->nick);
1359                                 params.push_back(":"+text);
1360                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
1361                         }
1362                 }
1363                 else
1364                 {
1365                         if (std::string(user->server) == Srv->GetServerName())
1366                         {
1367                                 chanrec *c = (chanrec*)dest;
1368                                 std::deque<std::string> params;
1369                                 params.push_back(c->name);
1370                                 params.push_back(":"+text);
1371                                 DoOneToMany(user->nick,"NOTICE",params);
1372                         }
1373                 }
1374         }
1375
1376         virtual void OnUserMessage(userrec* user, void* dest, int target_type, std::string text)
1377         {
1378                 if (target_type == TYPE_USER)
1379                 {
1380                         // route private messages which are targetted at clients only to the server
1381                         // which needs to receive them
1382                         userrec* d = (userrec*)dest;
1383                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
1384                         {
1385                                 std::deque<std::string> params;
1386                                 params.clear();
1387                                 params.push_back(d->nick);
1388                                 params.push_back(":"+text);
1389                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
1390                         }
1391                 }
1392                 else
1393                 {
1394                         if (std::string(user->server) == Srv->GetServerName())
1395                         {
1396                                 chanrec *c = (chanrec*)dest;
1397                                 std::deque<std::string> params;
1398                                 params.push_back(c->name);
1399                                 params.push_back(":"+text);
1400                                 DoOneToMany(user->nick,"PRIVMSG",params);
1401                         }
1402                 }
1403         }
1404
1405         virtual void OnUserJoin(userrec* user, chanrec* channel)
1406         {
1407                 // Only do this for local users
1408                 if (std::string(user->server) == Srv->GetServerName())
1409                 {
1410                         log(DEBUG,"**** User on %s JOINS %s",user->server,channel->name);
1411                         std::deque<std::string> params;
1412                         params.clear();
1413                         params.push_back(channel->name);
1414                         if (*channel->key)
1415                         {
1416                                 log(DEBUG,"**** With key %s",channel->key);
1417                                 // if the channel has a key, force the join by emulating the key.
1418                                 params.push_back(channel->key);
1419                         }
1420                         DoOneToMany(user->nick,"JOIN",params);
1421                 }
1422         }
1423
1424         virtual void OnUserPart(userrec* user, chanrec* channel)
1425         {
1426                 if (std::string(user->server) == Srv->GetServerName())
1427                 {
1428                         log(DEBUG,"**** User on %s PARTS %s",user->server,channel->name);
1429                         std::deque<std::string> params;
1430                         params.clear();
1431                         params.push_back(channel->name);
1432                         DoOneToMany(user->nick,"PART",params);
1433                 }
1434         }
1435
1436         virtual void OnUserConnect(userrec* user)
1437         {
1438                 char agestr[MAXBUF];
1439                 if (std::string(user->server) == Srv->GetServerName())
1440                 {
1441                         log(DEBUG,"**** User on %s CONNECTS: %s",user->server,user->nick);
1442                         std::deque<std::string> params;
1443                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
1444                         params.clear();
1445                         params.push_back(agestr);
1446                         params.push_back(user->nick);
1447                         params.push_back(user->host);
1448                         params.push_back(user->dhost);
1449                         params.push_back(user->ident);
1450                         params.push_back("+"+std::string(user->modes));
1451                         params.push_back(user->ip);
1452                         params.push_back(":"+std::string(user->fullname));
1453                         DoOneToMany(Srv->GetServerName(),"NICK",params);
1454                 }
1455         }
1456
1457         virtual void OnUserQuit(userrec* user, std::string reason)
1458         {
1459                 if (std::string(user->server) == Srv->GetServerName())
1460                 {
1461                         log(DEBUG,"**** User on %s QUITS: %s",user->server,user->nick);
1462                         std::deque<std::string> params;
1463                         params.push_back(":"+reason);
1464                         DoOneToMany(user->nick,"QUIT",params);
1465                 }
1466         }
1467
1468         virtual void OnUserPostNick(userrec* user, std::string oldnick)
1469         {
1470                 if (std::string(user->server) == Srv->GetServerName())
1471                 {
1472                         log(DEBUG,"**** User on %s changes NICK: %s",user->server,user->nick);
1473                         std::deque<std::string> params;
1474                         params.push_back(user->nick);
1475                         DoOneToMany(oldnick,"NICK",params);
1476                 }
1477         }
1478
1479         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, std::string reason)
1480         {
1481                 if (std::string(source->server) == Srv->GetServerName())
1482                 {
1483                         log(DEBUG,"**** User on %s KICKs: %s %s",source->server,source->nick,user->nick);
1484                         std::deque<std::string> params;
1485                         params.push_back(chan->name);
1486                         params.push_back(user->nick);
1487                         params.push_back(":"+reason);
1488                         DoOneToMany(source->nick,"KICK",params);
1489                 }
1490         }
1491
1492         virtual void OnRemoteKill(userrec* source, userrec* dest, std::string reason)
1493         {
1494                 std::deque<std::string> params;
1495                 params.push_back(dest->nick);
1496                 params.push_back(":"+reason);
1497                 DoOneToMany(source->nick,"KILL",params);
1498         }
1499
1500         // note: the protocol does not allow direct umode +o except
1501         // via NICK with 8 params. sending OPERTYPE infers +o modechange
1502         // locally.
1503         virtual void OnOper(userrec* user, std::string opertype)
1504         {
1505                 if (std::string(user->server) == Srv->GetServerName())
1506                 {
1507                         std::deque<std::string> params;
1508                         params.push_back(opertype);
1509                         DoOneToMany(user->nick,"OPERTYPE",params);
1510                 }
1511         }
1512
1513         virtual void OnMode(userrec* user, void* dest, int target_type, std::string text)
1514         {
1515                 log(DEBUG,"*** ONMODE TRIGGER");
1516                 if (std::string(user->server) == Srv->GetServerName())
1517                 {
1518                         log(DEBUG,"*** LOCAL");
1519                         if (target_type == TYPE_USER)
1520                         {
1521                                 userrec* u = (userrec*)dest;
1522                                 std::deque<std::string> params;
1523                                 params.push_back(u->nick);
1524                                 params.push_back(text);
1525                                 DoOneToMany(user->nick,"MODE",params);
1526                         }
1527                         else
1528                         {
1529                                 chanrec* c = (chanrec*)dest;
1530                                 std::deque<std::string> params;
1531                                 params.push_back(c->name);
1532                                 params.push_back(text);
1533                                 DoOneToMany(user->nick,"MODE",params);
1534                         }
1535                 }
1536         }
1537
1538         virtual ~ModuleSpanningTree()
1539         {
1540                 delete Srv;
1541         }
1542
1543         virtual Version GetVersion()
1544         {
1545                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
1546         }
1547 };
1548
1549
1550 class ModuleSpanningTreeFactory : public ModuleFactory
1551 {
1552  public:
1553         ModuleSpanningTreeFactory()
1554         {
1555         }
1556
1557         ~ModuleSpanningTreeFactory()
1558         {
1559         }
1560
1561         virtual Module * CreateModule()
1562         {
1563                 return new ModuleSpanningTree;
1564         }
1565
1566 };
1567
1568
1569 extern "C" void * init_module( void )
1570 {
1571         return new ModuleSpanningTreeFactory;
1572 }
1573