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 ForceTopic(std::string source, std::deque<std::string> params)
 453         {
 454                 // FTOPIC %s %lu %s :%s
 455                 if (params.size() != 4)
 456                         return true;
 457                 std::string channel = params[0];
 458                 time_t ts = atoi(params[1].c_str());
 459                 std::string setby = params[2];
 460                 std::string topic = params[3];
 461
 462                 chanrec* c = Srv->FindChannel(channel);
 463                 if (c)
 464                 {
 465                         if ((ts >= c->topicset) || (!*c->topic))
 466                         {
 467                                 strlcpy(c->topic,topic.c_str(),MAXTOPIC);
 468                                 strlcpy(c->setby,setby.c_str(),NICKMAX);
 469                                 c->topicset = ts;
 470                                 WriteChannelWithServ((char*)source.c_str(), c, "TOPIC %s :%s", c->name, c->topic);
 471                         }
 472
 473                 }
 474
 475                 // all done, send it on its way
 476                 params[3] = ":" + params[3];
 477                 DoOneToAllButSender(source,"FTOPIC",params,source);
 478
 479                 return true;
 480         }
 481
 482         bool ForceJoin(std::string source, std::deque<std::string> params)
 483         {
 484                 if (params.size() < 1)
 485                         return true;
 486                 for (unsigned int channelnum = 0; channelnum < params.size(); channelnum++)
 487                 {
 488                         // process one channel at a time, applying modes.
 489                         char* channel = (char*)params[channelnum].c_str();
 490                         char permissions = *channel;
 491                         char* mode = NULL;
 492                         switch (permissions)
 493                         {
 494                                 case '@':
 495                                         channel++;
 496                                         mode = "+o";
 497                                 break;
 498                                 case '%':
 499                                         channel++;
 500                                         mode = "+h";
 501                                 break;
 502                                 case '+':
 503                                         channel++;
 504                                         mode = "+v";
 505                                 break;
 506                         }
 507                         userrec* who = Srv->FindNick(source);
 508                         if (who)
 509                         {
 510                                 char* key = "";
 511                                 chanrec* chan = Srv->FindChannel(channel);
 512                                 if ((chan) && (*chan->key))
 513                                 {
 514                                         key = chan->key;
 515                                 }
 516                                 Srv->JoinUserToChannel(who,channel,key);
 517                                 if (mode)
 518                                 {
 519                                         char* modelist[3];
 520                                         modelist[0] = channel;
 521                                         modelist[1] = mode;
 522                                         modelist[2] = who->nick;
 523                                         Srv->SendMode(modelist,3,who);
 524                                 }
 525                                 DoOneToAllButSender(source,"FJOIN",params,who->server);
 526                         }
 527                 }
 528                 return true;
 529         }
 530
 531         bool IntroduceClient(std::string source, std::deque<std::string> params)
 532         {
 533                 if (params.size() < 8)
 534                         return true;
 535                 // NICK age nick host dhost ident +modes ip :gecos
 536                 //       0   1    2    3      4     5    6   7
 537                 std::string nick = params[1];
 538                 std::string host = params[2];
 539                 std::string dhost = params[3];
 540                 std::string ident = params[4];
 541                 time_t age = atoi(params[0].c_str());
 542                 std::string modes = params[5];
 543                 if (*(modes.c_str()) == '+')
 544                 {
 545                         char* m = (char*)modes.c_str();
 546                         m++;
 547                         modes = m;
 548                 }
 549                 std::string ip = params[6];
 550                 std::string gecos = params[7];
 551                 char* tempnick = (char*)nick.c_str();
 552                 log(DEBUG,"Introduce client %s!%s@%s",tempnick,ident.c_str(),host.c_str());
 553
 554                 user_hash::iterator iter;
 555                 iter = clientlist.find(tempnick);
 556                 if (iter != clientlist.end())
 557                 {
 558                         // nick collision
 559                         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);
 560                         if (age <= iter->second->age)
 561                         {
 562                                 log (DEBUG,"*** COLLISION: Remote client is older");
 563                                 // remote client is older
 564                                 // if hosts are identical, kill the remote,
 565                                 // else kill the local. We must send KILL for
 566                                 // removal of remote users.
 567                                 if (!strcmp(iter->second->host,host.c_str()))
 568                                 {
 569                                         // kill the remote by sending KILL,
 570                                         // and ABORT to stop it being introduced here.
 571                                         log(DEBUG,"**** LOCATION ONE");
 572                                         this->WriteLine(":"+Srv->GetServerName()+" KILL "+tempnick+" :Killed (Nickname collision from "+Srv->GetServerName()+")");
 573                                         return true;
 574                                 }
 575                                 else
 576                                 {
 577                                         log(DEBUG,"*** LOCATION TWO");
 578                                         // kill our local and continue to let the remote be introduced
 579                                         Srv->QuitUser(iter->second,"Killed (Nickname collision from "+source+")");
 580                                 }
 581                         }
 582                         else
 583                         {
 584                                 log(DEBUG,"*** COLLISION: Remote client is newer");
 585                                 // remote is newer, kill it and bail to stop it being introduced
 586                                 this->WriteLine(":"+Srv->GetServerName()+" KILL "+tempnick+" :Killed (Nickname collision from "+Srv->GetServerName()+")");
 587                                 return true;
 588                         }
 589                 }
 590
 591                 clientlist[tempnick] = new userrec();
 592                 clientlist[tempnick]->fd = FD_MAGIC_NUMBER;
 593                 strlcpy(clientlist[tempnick]->nick, tempnick,NICKMAX);
 594                 strlcpy(clientlist[tempnick]->host, host.c_str(),160);
 595                 strlcpy(clientlist[tempnick]->dhost, dhost.c_str(),160);
 596                 clientlist[tempnick]->server = (char*)FindServerNamePtr(source.c_str());
 597                 strlcpy(clientlist[tempnick]->ident, ident.c_str(),IDENTMAX);
 598                 strlcpy(clientlist[tempnick]->fullname, gecos.c_str(),MAXGECOS);
 599                 clientlist[tempnick]->registered = 7;
 600                 clientlist[tempnick]->signon = age;
 601                 strlcpy(clientlist[tempnick]->ip,ip.c_str(),16);
 602                 for (int i = 0; i < MAXCHANS; i++)
 603                 {
 604                         clientlist[tempnick]->chans[i].channel = NULL;
 605                         clientlist[tempnick]->chans[i].uc_modes = 0;
 606                 }
 607                 params[7] = ":" + params[7];
 608                 DoOneToAllButSender(source,"NICK",params,source);
 609                 return true;
 610         }
 611
 612         void SendChannelModes(TreeServer* Current)
 613         {
 614                 char data[MAXBUF];
 615                 for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 616                 {
 617                         snprintf(data,MAXBUF,":%s FMODE %s +%s",Srv->GetServerName().c_str(),c->second->name,chanmodes(c->second));
 618                         this->WriteLine(data);
 619                         if (*c->second->topic)
 620                         {
 621                                 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);
 622                                 this->WriteLine(data);
 623                         }
 624                         for (BanList::iterator b = c->second->bans.begin(); b != c->second->bans.end(); b++)
 625                         {
 626                                 snprintf(data,MAXBUF,":%s FMODE %s +b %s",Srv->GetServerName().c_str(),c->second->name,b->data);
 627                                 this->WriteLine(data);
 628                         }
 629                 }
 630         }
 631
 632         // send all users and their channels
 633         void SendUsers(TreeServer* Current)
 634         {
 635                 char data[MAXBUF];
 636                 for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 637                 {
 638                         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);
 639                         this->WriteLine(data);
 640                         if (strchr(u->second->modes,'o'))
 641                         {
 642                                 this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
 643                         }
 644                         char* chl = chlist(u->second,u->second);
 645                         if (*chl)
 646                         {
 647                                 this->WriteLine(":"+std::string(u->second->nick)+" FJOIN "+std::string(chl));
 648                         }
 649                 }
 650         }
 651
 652         void DoBurst(TreeServer* s)
 653         {
 654                 log(DEBUG,"Beginning network burst");
 655                 Srv->SendOpers("*** Bursting to "+s->GetName()+".");
 656                 this->WriteLine("BURST");
 657                 // Send server tree
 658                 this->SendServers(TreeRoot,s,1);
 659                 // Send users and their channels
 660                 this->SendUsers(s);
 661                 // TODO: Send everything else (channel modes etc)
 662                 this->SendChannelModes(s);
 663                 this->WriteLine("ENDBURST");
 664         }
 665
 666         virtual bool OnDataReady()
 667         {
 668                 char* data = this->Read();
 669                 if (data)
 670                 {
 671                         this->in_buffer += data;
 672                         while (in_buffer.find("\n") != std::string::npos)
 673                         {
 674                                 char* line = (char*)in_buffer.c_str();
 675                                 std::string ret = "";
 676                                 while ((*line != '\n') && (strlen(line)))
 677                                 {
 678                                         ret = ret + *line;
 679                                         line++;
 680                                 }
 681                                 if ((*line == '\n') || (*line == '\r'))
 682                                         line++;
 683                                 in_buffer = line;
 684                                 if (!this->ProcessLine(ret))
 685                                 {
 686                                         return false;
 687                                 }
 688                         }
 689                 }
 690                 return (data != NULL);
 691         }
 692
 693         int WriteLine(std::string line)
 694         {
 695                 return this->Write(line + "\r\n");
 696         }
 697
 698         bool Error(std::deque<std::string> params)
 699         {
 700                 if (params.size() < 1)
 701                         return false;
 702                 std::string Errmsg = params[0];
 703                 std::string SName = myhost;
 704                 if (InboundServerName != "")
 705                 {
 706                         SName = InboundServerName;
 707                 }
 708                 Srv->SendOpers("*** ERROR from "+SName+": "+Errmsg);
 709                 // we will return false to cause the socket to close.
 710                 return false;
 711         }
 712
 713         bool OperType(std::string prefix, std::deque<std::string> params)
 714         {
 715                 if (params.size() != 1)
 716                         return true;
 717                 std::string opertype = params[0];
 718                 userrec* u = Srv->FindNick(prefix);
 719                 if (u)
 720                 {
 721                         strlcpy(u->oper,opertype.c_str(),NICKMAX);
 722                         if (!strchr(u->modes,'o'))
 723                         {
 724                                 strcat(u->modes,"o");
 725                         }
 726                         DoOneToAllButSender(u->server,"OPERTYPE",params,u->server);
 727                 }
 728                 return true;
 729         }
 730
 731         bool RemoteKill(std::string prefix, std::deque<std::string> params)
 732         {
 733                 if (params.size() != 2)
 734                         return true;
 735                 std::string nick = params[0];
 736                 std::string reason = params[1];
 737                 userrec* u = Srv->FindNick(prefix);
 738                 userrec* who = Srv->FindNick(nick);
 739                 if (who)
 740                 {
 741                         std::string sourceserv = prefix;
 742                         if (u)
 743                         {
 744                                 sourceserv = u->server;
 745                         }
 746                         params[1] = ":" + params[1];
 747                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
 748                         Srv->QuitUser(who,reason);
 749                 }
 750                 return true;
 751         }
 752
 753         bool RemoteServer(std::string prefix, std::deque<std::string> params)
 754         {
 755                 if (params.size() < 4)
 756                         return false;
 757                 std::string servername = params[0];
 758                 std::string password = params[1];
 759                 int hops = atoi(params[2].c_str());
 760                 std::string description = params[3];
 761                 if (!hops)
 762                 {
 763                         this->WriteLine("ERROR :Protocol error - Introduced remote server with incorrect hopcount!");
 764                         return false;
 765                 }
 766                 TreeServer* ParentOfThis = FindServer(prefix);
 767                 if (!ParentOfThis)
 768                 {
 769                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
 770                         return false;
 771                 }
 772                 TreeServer* Node = new TreeServer(servername,description,ParentOfThis,NULL);
 773                 ParentOfThis->AddChild(Node);
 774                 params[3] = ":" + params[3];
 775                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
 776                 Srv->SendOpers("*** Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
 777                 return true;
 778         }
 779
 780         bool Outbound_Reply_Server(std::deque<std::string> params)
 781         {
 782                 if (params.size() < 4)
 783                         return false;
 784                 std::string servername = params[0];
 785                 std::string password = params[1];
 786                 int hops = atoi(params[2].c_str());
 787                 if (hops)
 788                 {
 789                         this->WriteLine("ERROR :Server too far away for authentication");
 790                         return false;
 791                 }
 792                 std::string description = params[3];
 793                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 794                 {
 795                         if ((x->Name == servername) && (x->RecvPass == password))
 796                         {
 797                                 // Begin the sync here. this kickstarts the
 798                                 // other side, waiting in WAIT_AUTH_2 state,
 799                                 // into starting their burst, as it shows
 800                                 // that we're happy.
 801                                 this->LinkState = CONNECTED;
 802                                 // we should add the details of this server now
 803                                 // to the servers tree, as a child of the root
 804                                 // node.
 805                                 TreeServer* Node = new TreeServer(servername,description,TreeRoot,this);
 806                                 TreeRoot->AddChild(Node);
 807                                 params[3] = ":" + params[3];
 808                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,servername);
 809                                 this->DoBurst(Node);
 810                                 return true;
 811                         }
 812                 }
 813                 this->WriteLine("ERROR :Invalid credentials");
 814                 return false;
 815         }
 816
 817         bool Inbound_Server(std::deque<std::string> params)
 818         {
 819                 if (params.size() < 4)
 820                         return false;
 821                 std::string servername = params[0];
 822                 std::string password = params[1];
 823                 int hops = atoi(params[2].c_str());
 824                 if (hops)
 825                 {
 826                         this->WriteLine("ERROR :Server too far away for authentication");
 827                         return false;
 828                 }
 829                 std::string description = params[3];
 830                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 831                 {
 832                         if ((x->Name == servername) && (x->RecvPass == password))
 833                         {
 834                                 Srv->SendOpers("*** Verified incoming server connection from \002"+servername+"\002["+this->GetIP()+"] ("+description+")");
 835                                 this->InboundServerName = servername;
 836                                 this->InboundDescription = description;
 837                                 // this is good. Send our details: Our server name and description and hopcount of 0,
 838                                 // along with the sendpass from this block.
 839                                 this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 840                                 // move to the next state, we are now waiting for THEM.
 841                                 this->LinkState = WAIT_AUTH_2;
 842                                 return true;
 843                         }
 844                 }
 845                 this->WriteLine("ERROR :Invalid credentials");
 846                 return false;
 847         }
 848
 849         std::deque<std::string> Split(std::string line, bool stripcolon)
 850         {
 851                 std::deque<std::string> n;
 852                 std::stringstream s(line);
 853                 std::string param = "";
 854                 n.clear();
 855                 int item = 0;
 856                 while (!s.eof())
 857                 {
 858                         s >> param;
 859                         if ((param != "") && (param != "\n"))
 860                         {
 861                                 if ((param.c_str()[0] == ':') && (item))
 862                                 {
 863                                         char* str = (char*)param.c_str();
 864                                         str++;
 865                                         param = str;
 866                                         std::string append;
 867                                         while (!s.eof())
 868                                         {
 869                                                 append = "";
 870                                                 s >> append;
 871                                                 if (append != "")
 872                                                 {
 873                                                         param = param + " " + append;
 874                                                 }
 875                                         }
 876                                 }
 877                                 item++;
 878                                 n.push_back(param);
 879                         }
 880                 }
 881                 return n;
 882         }
 883
 884         bool ProcessLine(std::string line)
 885         {
 886                 char* l = (char*)line.c_str();
 887                 while ((strlen(l)) && (l[strlen(l)-1] == '\r') || (l[strlen(l)-1] == '\n'))
 888                         l[strlen(l)-1] = '\0';
 889                 line = l;
 890                 if (line == "")
 891                         return true;
 892                 Srv->Log(DEBUG,"inbound-line: '"+line+"'");
 893                 std::deque<std::string> params = this->Split(line,true);
 894                 std::string command = "";
 895                 std::string prefix = "";
 896                 if (((params[0].c_str())[0] == ':') && (params.size() > 1))
 897                 {
 898                         prefix = params[0];
 899                         command = params[1];
 900                         char* pref = (char*)prefix.c_str();
 901                         prefix = ++pref;
 902                         params.pop_front();
 903                         params.pop_front();
 904                 }
 905                 else
 906                 {
 907                         prefix = "";
 908                         command = params[0];
 909                         params.pop_front();
 910                 }
 911
 912                 switch (this->LinkState)
 913                 {
 914                         TreeServer* Node;
 915
 916                         case WAIT_AUTH_1:
 917                                 // Waiting for SERVER command from remote server. Server initiating
 918                                 // the connection sends the first SERVER command, listening server
 919                                 // replies with theirs if its happy, then if the initiator is happy,
 920                                 // it starts to send its net sync, which starts the merge, otherwise
 921                                 // it sends an ERROR.
 922                                 if (command == "SERVER")
 923                                 {
 924                                         return this->Inbound_Server(params);
 925                                 }
 926                                 else if (command == "ERROR")
 927                                 {
 928                                         return this->Error(params);
 929                                 }
 930                         break;
 931                         case WAIT_AUTH_2:
 932                                 // Waiting for start of other side's netmerge to say they liked our
 933                                 // password.
 934                                 if (command == "SERVER")
 935                                 {
 936                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
 937                                         // silently ignore.
 938                                         return true;
 939                                 }
 940                                 else if (command == "BURST")
 941                                 {
 942                                         this->LinkState = CONNECTED;
 943                                         Node = new TreeServer(InboundServerName,InboundDescription,TreeRoot,this);
 944                                         TreeRoot->AddChild(Node);
 945                                         params.clear();
 946                                         params.push_back(InboundServerName);
 947                                         params.push_back("*");
 948                                         params.push_back("1");
 949                                         params.push_back(":"+InboundDescription);
 950                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
 951                                         this->DoBurst(Node);
 952                                 }
 953                                 else if (command == "ERROR")
 954                                 {
 955                                         return this->Error(params);
 956                                 }
 957
 958                         break;
 959                         case LISTENER:
 960                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
 961                                 return false;
 962                         break;
 963                         case CONNECTING:
 964                                 if (command == "SERVER")
 965                                 {
 966                                         // another server we connected to, which was in WAIT_AUTH_1 state,
 967                                         // has just sent us their credentials. If we get this far, theyre
 968                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
 969                                         // if we're happy with this, we should send our netburst which
 970                                         // kickstarts the merge.
 971                                         return this->Outbound_Reply_Server(params);
 972                                 }
 973                         break;
 974                         case CONNECTED:
 975                                 // This is the 'authenticated' state, when all passwords
 976                                 // have been exchanged and anything past this point is taken
 977                                 // as gospel.
 978                                 std::string target = "";
 979                                 if ((command == "NICK") && (params.size() > 1))
 980                                 {
 981                                         return this->IntroduceClient(prefix,params);
 982                                 }
 983                                 else if (command == "FJOIN")
 984                                 {
 985                                         return this->ForceJoin(prefix,params);
 986                                 }
 987                                 else if (command == "SERVER")
 988                                 {
 989                                         return this->RemoteServer(prefix,params);
 990                                 }
 991                                 else if (command == "OPERTYPE")
 992                                 {
 993                                         return this->OperType(prefix,params);
 994                                 }
 995                                 else if (command == "FMODE")
 996                                 {
 997                                         return this->ForceMode(prefix,params);
 998                                 }
 999                                 else if (command == "KILL")
1000                                 {
1001                                         return this->RemoteKill(prefix,params);
1002                                 }
1003                                 else if (command == "FTOPIC")
1004                                 {
1005                                         return this->ForceTopic(prefix,params);
1006                                 }
1007                                 else if (command == "SQUIT")
1008                                 {
1009                                         if (params.size() == 2)
1010                                         {
1011                                                 this->Squit(FindServer(params[0]),params[1]);
1012                                         }
1013                                         return true;
1014                                 }
1015                                 else
1016                                 {
1017                                         // not a special inter-server command.
1018                                         // Emulate the actual user doing the command,
1019                                         // this saves us having a huge ugly parser.
1020                                         userrec* who = Srv->FindNick(prefix);
1021                                         std::string sourceserv = this->myhost;
1022                                         if (this->InboundServerName != "")
1023                                         {
1024                                                 sourceserv = this->InboundServerName;
1025                                         }
1026                                         if (who)
1027                                         {
1028                                                 // its a user
1029                                                 target = who->server;
1030                                                 char* strparams[127];
1031                                                 for (unsigned int q = 0; q < params.size(); q++)
1032                                                 {
1033                                                         strparams[q] = (char*)params[q].c_str();
1034                                                 }
1035                                                 log(DEBUG,"*** CALL COMMAND HANDLER FOR %s, SOURCE: '%s'",command.c_str(),who->nick);
1036                                                 Srv->CallCommandHandler(command, strparams, params.size(), who);
1037                                         }
1038                                         else
1039                                         {
1040                                                 // its not a user. Its either a server, or somethings screwed up.
1041                                                 if (IsServer(prefix))
1042                                                 {
1043                                                         target = Srv->GetServerName();
1044                                                 }
1045                                                 else
1046                                                 {
1047                                                         log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
1048                                                         return true;
1049                                                 }
1050                                         }
1051                                         return DoOneToAllButSenderRaw(line,sourceserv);
1052
1053                                 }
1054                                 return true;
1055                         break;
1056                 }
1057                 return true;
1058         }
1059
1060         virtual void OnTimeout()
1061         {
1062                 if (this->LinkState == CONNECTING)
1063                 {
1064                         Srv->SendOpers("*** CONNECT: Connection to \002"+myhost+"\002 timed out.");
1065                 }
1066         }
1067
1068         virtual void OnClose()
1069         {
1070                 // Connection closed.
1071                 // If the connection is fully up (state CONNECTED)
1072                 // then propogate a netsplit to all peers.
1073                 std::string quitserver = this->myhost;
1074                 if (this->InboundServerName != "")
1075                 {
1076                         quitserver = this->InboundServerName;
1077                 }
1078                 TreeServer* s = FindServer(quitserver);
1079                 if (s)
1080                 {
1081                         Squit(s,"Remote host closed the connection");
1082                 }
1083         }
1084
1085         virtual int OnIncomingConnection(int newsock, char* ip)
1086         {
1087                 TreeSocket* s = new TreeSocket(newsock, ip);
1088                 Srv->AddSocket(s);
1089                 return true;
1090         }
1091 };
1092
1093 bool DoOneToAllButSenderRaw(std::string data,std::string omit)
1094 {
1095         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1096         {
1097                 TreeServer* Route = TreeRoot->GetChild(x);
1098                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (BestRouteTo(omit) != Route))
1099                 {
1100                         TreeSocket* Sock = Route->GetSocket();
1101                         log(DEBUG,"Sending RAW to %s",Route->GetName().c_str());
1102                         Sock->WriteLine(data);
1103                 }
1104         }
1105         return true;
1106 }
1107
1108 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> params, std::string omit)
1109 {
1110         log(DEBUG,"ALLBUTONE: Comes from %s SHOULD NOT go back to %s",prefix.c_str(),omit.c_str());
1111         // TODO: Special stuff with privmsg and notice
1112         std::string FullLine = ":" + prefix + " " + command;
1113         for (unsigned int x = 0; x < params.size(); x++)
1114         {
1115                 FullLine = FullLine + " " + params[x];
1116         }
1117         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1118         {
1119                 TreeServer* Route = TreeRoot->GetChild(x);
1120                 // Send the line IF:
1121                 // The route has a socket (its a direct connection)
1122                 // The route isnt the one to be omitted
1123                 // The route isnt the path to the one to be omitted
1124                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (BestRouteTo(omit) != Route))
1125                 {
1126                         TreeSocket* Sock = Route->GetSocket();
1127                         log(DEBUG,"Sending to %s",Route->GetName().c_str());
1128                         Sock->WriteLine(FullLine);
1129                 }
1130         }
1131         return true;
1132 }
1133
1134 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> params)
1135 {
1136         std::string FullLine = ":" + prefix + " " + command;
1137         for (unsigned int x = 0; x < params.size(); x++)
1138         {
1139                 FullLine = FullLine + " " + params[x];
1140         }
1141         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1142         {
1143                 TreeServer* Route = TreeRoot->GetChild(x);
1144                 if (Route->GetSocket())
1145                 {
1146                         TreeSocket* Sock = Route->GetSocket();
1147                         Sock->WriteLine(FullLine);
1148                 }
1149         }
1150         return true;
1151 }
1152
1153 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> params, std::string target)
1154 {
1155         TreeServer* Route = BestRouteTo(target);
1156         if (Route)
1157         {
1158                 std::string FullLine = ":" + prefix + " " + command;
1159                 for (unsigned int x = 0; x < params.size(); x++)
1160                 {
1161                         FullLine = FullLine + " " + params[x];
1162                 }
1163                 if (Route->GetSocket())
1164                 {
1165                         TreeSocket* Sock = Route->GetSocket();
1166                         Sock->WriteLine(FullLine);
1167                 }
1168                 return true;
1169         }
1170         else
1171         {
1172                 log(DEBUG,"Could not route message with target %s: %s",target.c_str(),command.c_str());
1173                 return true;
1174         }
1175 }
1176
1177
1178 class ModuleSpanningTree : public Module
1179 {
1180         std::vector<TreeSocket*> Bindings;
1181         int line;
1182
1183  public:
1184
1185         void ReadConfiguration(bool rebind)
1186         {
1187                 if (rebind)
1188                 {
1189                         for (int j =0; j < Conf->Enumerate("bind"); j++)
1190                         {
1191                                 std::string Type = Conf->ReadValue("bind","type",j);
1192                                 std::string IP = Conf->ReadValue("bind","address",j);
1193                                 long Port = Conf->ReadInteger("bind","port",j,true);
1194                                 if (Type == "servers")
1195                                 {
1196                                         if (IP == "*")
1197                                         {
1198                                                 IP = "";
1199                                         }
1200                                         TreeSocket* listener = new TreeSocket(IP.c_str(),Port,true,10);
1201                                         if (listener->GetState() == I_LISTENING)
1202                                         {
1203                                                 Srv->AddSocket(listener);
1204                                                 Bindings.push_back(listener);
1205                                         }
1206                                         else
1207                                         {
1208                                                 log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
1209                                                 listener->Close();
1210                                                 delete listener;
1211                                         }
1212                                 }
1213                         }
1214                 }
1215                 LinkBlocks.clear();
1216                 for (int j =0; j < Conf->Enumerate("link"); j++)
1217                 {
1218                         Link L;
1219                         L.Name = Conf->ReadValue("link","name",j);
1220                         L.IPAddr = Conf->ReadValue("link","ipaddr",j);
1221                         L.Port = Conf->ReadInteger("link","port",j,true);
1222                         L.SendPass = Conf->ReadValue("link","sendpass",j);
1223                         L.RecvPass = Conf->ReadValue("link","recvpass",j);
1224                         LinkBlocks.push_back(L);
1225                         log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
1226                 }
1227         }
1228
1229         ModuleSpanningTree()
1230         {
1231                 Srv = new Server;
1232                 Conf = new ConfigReader;
1233                 Bindings.clear();
1234
1235                 // Create the root of the tree
1236                 TreeRoot = new TreeServer(Srv->GetServerName(),Srv->GetServerDescription());
1237
1238                 ReadConfiguration(true);
1239         }
1240
1241         void ShowLinks(TreeServer* Current, userrec* user, int hops)
1242         {
1243                 std::string Parent = TreeRoot->GetName();
1244                 if (Current->GetParent())
1245                 {
1246                         Parent = Current->GetParent()->GetName();
1247                 }
1248                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1249                 {
1250                         ShowLinks(Current->GetChild(q),user,hops+1);
1251                 }
1252                 WriteServ(user->fd,"364 %s %s %s :%d %s",user->nick,Current->GetName().c_str(),Parent.c_str(),hops,Current->GetDesc().c_str());
1253         }
1254
1255         void HandleLinks(char** parameters, int pcnt, userrec* user)
1256         {
1257                 ShowLinks(TreeRoot,user,0);
1258                 WriteServ(user->fd,"365 %s * :End of /LINKS list.",user->nick);
1259                 return;
1260         }
1261
1262         void HandleLusers(char** parameters, int pcnt, userrec* user)
1263         {
1264                 return;
1265         }
1266
1267         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
1268
1269         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80])
1270         {
1271                 if (line < 128)
1272                 {
1273                         for (int t = 0; t < depth; t++)
1274                         {
1275                                 matrix[line][t] = ' ';
1276                         }
1277                         strlcpy(&matrix[line][depth],Current->GetName().c_str(),80);
1278                         line++;
1279                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
1280                         {
1281                                 ShowMap(Current->GetChild(q),user,depth+2,matrix);
1282                         }
1283                 }
1284         }
1285
1286         // Ok, prepare to be confused.
1287         // After much mulling over how to approach this, it struck me that
1288         // the 'usual' way of doing a /MAP isnt the best way. Instead of
1289         // keeping track of a ton of ascii characters, and line by line
1290         // under recursion working out where to place them using multiplications
1291         // and divisons, we instead render the map onto a backplane of characters
1292         // (a character matrix), then draw the branches as a series of "L" shapes
1293         // from the nodes. This is not only friendlier on CPU it uses less stack.
1294
1295         void HandleMap(char** parameters, int pcnt, userrec* user)
1296         {
1297                 // This array represents a virtual screen which we will
1298                 // "scratch" draw to, as the console device of an irc
1299                 // client does not provide for a proper terminal.
1300                 char matrix[128][80];
1301                 for (unsigned int t = 0; t < 128; t++)
1302                 {
1303                         matrix[t][0] = '\0';
1304                 }
1305                 line = 0;
1306                 // The only recursive bit is called here.
1307                 ShowMap(TreeRoot,user,0,matrix);
1308                 // Process each line one by one. The algorithm has a limit of
1309                 // 128 servers (which is far more than a spanning tree should have
1310                 // anyway, so we're ok). This limit can be raised simply by making
1311                 // the character matrix deeper, 128 rows taking 10k of memory.
1312                 for (int l = 1; l < line; l++)
1313                 {
1314                         // scan across the line looking for the start of the
1315                         // servername (the recursive part of the algorithm has placed
1316                         // the servers at indented positions depending on what they
1317                         // are related to)
1318                         int first_nonspace = 0;
1319                         while (matrix[l][first_nonspace] == ' ')
1320                         {
1321                                 first_nonspace++;
1322                         }
1323                         first_nonspace--;
1324                         // Draw the `- (corner) section: this may be overwritten by
1325                         // another L shape passing along the same vertical pane, becoming
1326                         // a |- (branch) section instead.
1327                         matrix[l][first_nonspace] = '-';
1328                         matrix[l][first_nonspace-1] = '`';
1329                         int l2 = l - 1;
1330                         // Draw upwards until we hit the parent server, causing possibly
1331                         // other corners (`-) to become branches (|-)
1332                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
1333                         {
1334                                 matrix[l2][first_nonspace-1] = '|';
1335                                 l2--;
1336                         }
1337                 }
1338                 // dump the whole lot to the user. This is the easy bit, honest.
1339                 for (int t = 0; t < line; t++)
1340                 {
1341                         WriteServ(user->fd,"006 %s :%s",user->nick,&matrix[t][0]);
1342                 }
1343                 WriteServ(user->fd,"007 %s :End of /MAP",user->nick);
1344                 return;
1345         }
1346
1347         int HandleSquit(char** parameters, int pcnt, userrec* user)
1348         {
1349                 return 1;
1350         }
1351
1352         int HandleConnect(char** parameters, int pcnt, userrec* user)
1353         {
1354                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
1355                 {
1356                         if (Srv->MatchText(x->Name.c_str(),parameters[0]))
1357                         {
1358                                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: Connecting to server: %s (%s:%d)",user->nick,x->Name.c_str(),x->IPAddr.c_str(),x->Port);
1359                                 TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name);
1360                                 Srv->AddSocket(newsocket);
1361                                 return 1;
1362                         }
1363                 }
1364                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: No matching server could be found in the config file.",user->nick);
1365                 return 1;
1366         }
1367
1368         virtual int OnPreCommand(std::string command, char **parameters, int pcnt, userrec *user)
1369         {
1370                 if (command == "CONNECT")
1371                 {
1372                         return this->HandleConnect(parameters,pcnt,user);
1373                 }
1374                 else if (command == "SQUIT")
1375                 {
1376                         return this->HandleSquit(parameters,pcnt,user);
1377                 }
1378                 else if (command == "MAP")
1379                 {
1380                         this->HandleMap(parameters,pcnt,user);
1381                         return 1;
1382                 }
1383                 else if (command == "LUSERS")
1384                 {
1385                         this->HandleLusers(parameters,pcnt,user);
1386                         return 1;
1387                 }
1388                 else if (command == "LINKS")
1389                 {
1390                         this->HandleLinks(parameters,pcnt,user);
1391                         return 1;
1392                 }
1393                 return 0;
1394         }
1395
1396         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
1397         {
1398                 if (std::string(source->server) == Srv->GetServerName())
1399                 {
1400                         std::deque<std::string> params;
1401                         params.push_back(dest->nick);
1402                         params.push_back(channel->name);
1403                         DoOneToMany(source->nick,"INVITE",params);
1404                 }
1405         }
1406
1407         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, std::string topic)
1408         {
1409                 std::deque<std::string> params;
1410                 params.push_back(chan->name);
1411                 params.push_back(":"+topic);
1412                 DoOneToMany(user->nick,"TOPIC",params);
1413         }
1414
1415         virtual void OnUserNotice(userrec* user, void* dest, int target_type, std::string text)
1416         {
1417                 if (target_type == TYPE_USER)
1418                 {
1419                         userrec* d = (userrec*)dest;
1420                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
1421                         {
1422                                 std::deque<std::string> params;
1423                                 params.clear();
1424                                 params.push_back(d->nick);
1425                                 params.push_back(":"+text);
1426                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
1427                         }
1428                 }
1429                 else
1430                 {
1431                         if (std::string(user->server) == Srv->GetServerName())
1432                         {
1433                                 chanrec *c = (chanrec*)dest;
1434                                 std::deque<std::string> params;
1435                                 params.push_back(c->name);
1436                                 params.push_back(":"+text);
1437                                 DoOneToMany(user->nick,"NOTICE",params);
1438                         }
1439                 }
1440         }
1441
1442         virtual void OnUserMessage(userrec* user, void* dest, int target_type, std::string text)
1443         {
1444                 if (target_type == TYPE_USER)
1445                 {
1446                         // route private messages which are targetted at clients only to the server
1447                         // which needs to receive them
1448                         userrec* d = (userrec*)dest;
1449                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
1450                         {
1451                                 std::deque<std::string> params;
1452                                 params.clear();
1453                                 params.push_back(d->nick);
1454                                 params.push_back(":"+text);
1455                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
1456                         }
1457                 }
1458                 else
1459                 {
1460                         if (std::string(user->server) == Srv->GetServerName())
1461                         {
1462                                 chanrec *c = (chanrec*)dest;
1463                                 std::deque<std::string> params;
1464                                 params.push_back(c->name);
1465                                 params.push_back(":"+text);
1466                                 DoOneToMany(user->nick,"PRIVMSG",params);
1467                         }
1468                 }
1469         }
1470
1471         virtual void OnUserJoin(userrec* user, chanrec* channel)
1472         {
1473                 // Only do this for local users
1474                 if (std::string(user->server) == Srv->GetServerName())
1475                 {
1476                         log(DEBUG,"**** User on %s JOINS %s",user->server,channel->name);
1477                         std::deque<std::string> params;
1478                         params.clear();
1479                         params.push_back(channel->name);
1480                         if (*channel->key)
1481                         {
1482                                 log(DEBUG,"**** With key %s",channel->key);
1483                                 // if the channel has a key, force the join by emulating the key.
1484                                 params.push_back(channel->key);
1485                         }
1486                         DoOneToMany(user->nick,"JOIN",params);
1487                 }
1488         }
1489
1490         virtual void OnUserPart(userrec* user, chanrec* channel)
1491         {
1492                 if (std::string(user->server) == Srv->GetServerName())
1493                 {
1494                         log(DEBUG,"**** User on %s PARTS %s",user->server,channel->name);
1495                         std::deque<std::string> params;
1496                         params.clear();
1497                         params.push_back(channel->name);
1498                         DoOneToMany(user->nick,"PART",params);
1499                 }
1500         }
1501
1502         virtual void OnUserConnect(userrec* user)
1503         {
1504                 char agestr[MAXBUF];
1505                 if (std::string(user->server) == Srv->GetServerName())
1506                 {
1507                         log(DEBUG,"**** User on %s CONNECTS: %s",user->server,user->nick);
1508                         std::deque<std::string> params;
1509                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
1510                         params.clear();
1511                         params.push_back(agestr);
1512                         params.push_back(user->nick);
1513                         params.push_back(user->host);
1514                         params.push_back(user->dhost);
1515                         params.push_back(user->ident);
1516                         params.push_back("+"+std::string(user->modes));
1517                         params.push_back(user->ip);
1518                         params.push_back(":"+std::string(user->fullname));
1519                         DoOneToMany(Srv->GetServerName(),"NICK",params);
1520                 }
1521         }
1522
1523         virtual void OnUserQuit(userrec* user, std::string reason)
1524         {
1525                 if (std::string(user->server) == Srv->GetServerName())
1526                 {
1527                         log(DEBUG,"**** User on %s QUITS: %s",user->server,user->nick);
1528                         std::deque<std::string> params;
1529                         params.push_back(":"+reason);
1530                         DoOneToMany(user->nick,"QUIT",params);
1531                 }
1532         }
1533
1534         virtual void OnUserPostNick(userrec* user, std::string oldnick)
1535         {
1536                 if (std::string(user->server) == Srv->GetServerName())
1537                 {
1538                         log(DEBUG,"**** User on %s changes NICK: %s",user->server,user->nick);
1539                         std::deque<std::string> params;
1540                         params.push_back(user->nick);
1541                         DoOneToMany(oldnick,"NICK",params);
1542                 }
1543         }
1544
1545         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, std::string reason)
1546         {
1547                 if (std::string(source->server) == Srv->GetServerName())
1548                 {
1549                         log(DEBUG,"**** User on %s KICKs: %s %s",source->server,source->nick,user->nick);
1550                         std::deque<std::string> params;
1551                         params.push_back(chan->name);
1552                         params.push_back(user->nick);
1553                         params.push_back(":"+reason);
1554                         DoOneToMany(source->nick,"KICK",params);
1555                 }
1556         }
1557
1558         virtual void OnRemoteKill(userrec* source, userrec* dest, std::string reason)
1559         {
1560                 std::deque<std::string> params;
1561                 params.push_back(dest->nick);
1562                 params.push_back(":"+reason);
1563                 DoOneToMany(source->nick,"KILL",params);
1564         }
1565
1566         // note: the protocol does not allow direct umode +o except
1567         // via NICK with 8 params. sending OPERTYPE infers +o modechange
1568         // locally.
1569         virtual void OnOper(userrec* user, std::string opertype)
1570         {
1571                 if (std::string(user->server) == Srv->GetServerName())
1572                 {
1573                         std::deque<std::string> params;
1574                         params.push_back(opertype);
1575                         DoOneToMany(user->nick,"OPERTYPE",params);
1576                 }
1577         }
1578
1579         virtual void OnMode(userrec* user, void* dest, int target_type, std::string text)
1580         {
1581                 log(DEBUG,"*** ONMODE TRIGGER");
1582                 if (std::string(user->server) == Srv->GetServerName())
1583                 {
1584                         log(DEBUG,"*** LOCAL");
1585                         if (target_type == TYPE_USER)
1586                         {
1587                                 userrec* u = (userrec*)dest;
1588                                 std::deque<std::string> params;
1589                                 params.push_back(u->nick);
1590                                 params.push_back(text);
1591                                 DoOneToMany(user->nick,"MODE",params);
1592                         }
1593                         else
1594                         {
1595                                 chanrec* c = (chanrec*)dest;
1596                                 std::deque<std::string> params;
1597                                 params.push_back(c->name);
1598                                 params.push_back(text);
1599                                 DoOneToMany(user->nick,"MODE",params);
1600                         }
1601                 }
1602         }
1603
1604         virtual ~ModuleSpanningTree()
1605         {
1606                 delete Srv;
1607         }
1608
1609         virtual Version GetVersion()
1610         {
1611                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
1612         }
1613 };
1614
1615
1616 class ModuleSpanningTreeFactory : public ModuleFactory
1617 {
1618  public:
1619         ModuleSpanningTreeFactory()
1620         {
1621         }
1622
1623         ~ModuleSpanningTreeFactory()
1624         {
1625         }
1626
1627         virtual Module * CreateModule()
1628         {
1629                 return new ModuleSpanningTree;
1630         }
1631
1632 };
1633
1634
1635 extern "C" void * init_module( void )
1636 {
1637         return new ModuleSpanningTreeFactory;
1638 }
1639