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