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         if (ServerName.c_str() == TreeRoot->GetName())
 226         {
 227                 log(DEBUG,"Cant route to myself!!!");
 228                 return NULL;
 229         }
 230         // first, find the server by recursively walking the tree
 231         TreeServer* Found = RouteEnumerate(TreeRoot,ServerName);
 232         // did we find it? If not, they did something wrong, abort.
 233         if (!Found)
 234         {
 235                 log(DEBUG,"Failed to find %s by walking tree!",ServerName.c_str());
 236                 return NULL;
 237         }
 238         else
 239         {
 240                 // The server exists, follow its parent nodes until
 241                 // the parent of the current is 'TreeRoot', we know
 242                 // then that this is a directly-connected server.
 243                 while ((Found) && (Found->GetParent() != TreeRoot))
 244                 {
 245                         Found = Found->GetParent();
 246                 }
 247                 log(DEBUG,"Route to %s is via %s",ServerName.c_str(),Found->GetName().c_str());
 248                 return Found;
 249         }
 250 }
 251
 252 bool LookForServer(TreeServer* Current, std::string ServerName)
 253 {
 254         if (ServerName == Current->GetName())
 255                 return true;
 256         for (unsigned int q = 0; q < Current->ChildCount(); q++)
 257         {
 258                 if (LookForServer(Current->GetChild(q),ServerName))
 259                         return true;
 260         }
 261         return false;
 262 }
 263
 264 TreeServer* Found;
 265
 266 void RFindServer(TreeServer* Current, std::string ServerName)
 267 {
 268         if ((ServerName == Current->GetName()) && (!Found))
 269         {
 270                 Found = Current;
 271                 log(DEBUG,"Found server %s desc %s",Current->GetName().c_str(),Current->GetDesc().c_str());
 272                 return;
 273         }
 274         if (!Found)
 275         {
 276                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 277                 {
 278                         if (!Found)
 279                                 RFindServer(Current->GetChild(q),ServerName);
 280                 }
 281         }
 282         return;
 283 }
 284
 285 TreeServer* FindServer(std::string ServerName)
 286 {
 287         Found = NULL;
 288         RFindServer(TreeRoot,ServerName);
 289         return Found;
 290 }
 291
 292 bool IsServer(std::string ServerName)
 293 {
 294         return LookForServer(TreeRoot,ServerName);
 295 }
 296
 297 class TreeSocket : public InspSocket
 298 {
 299         std::string myhost;
 300         std::string in_buffer;
 301         ServerState LinkState;
 302         std::string InboundServerName;
 303         std::string InboundDescription;
 304         int num_lost_users;
 305         int num_lost_servers;
 306
 307  public:
 308
 309         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime)
 310                 : InspSocket(host, port, listening, maxtime)
 311         {
 312                 Srv->Log(DEBUG,"Create new listening");
 313                 myhost = host;
 314                 this->LinkState = LISTENER;
 315         }
 316
 317         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 318                 : InspSocket(host, port, listening, maxtime)
 319         {
 320                 Srv->Log(DEBUG,"Create new outbound");
 321                 myhost = ServerName;
 322                 this->LinkState = CONNECTING;
 323         }
 324
 325         TreeSocket(int newfd, char* ip)
 326                 : InspSocket(newfd, ip)
 327         {
 328                 Srv->Log(DEBUG,"Associate new inbound");
 329                 this->LinkState = WAIT_AUTH_1;
 330         }
 331
 332         virtual bool OnConnected()
 333         {
 334                 if (this->LinkState == CONNECTING)
 335                 {
 336                         Srv->SendOpers("*** Connection to "+myhost+"["+this->GetIP()+"] established.");
 337                         // we should send our details here.
 338                         // if the other side is satisfied, they send theirs.
 339                         // we do not need to change state here.
 340                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 341                         {
 342                                 if (x->Name == this->myhost)
 343                                 {
 344                                         // found who we're supposed to be connecting to, send the neccessary gubbins.
 345                                         this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 346                                         return true;
 347                                 }
 348                         }
 349                 }
 350                 log(DEBUG,"Outbound connection ERROR: Could not find the right link block!");
 351                 return true;
 352         }
 353
 354         virtual void OnError(InspSocketError e)
 355         {
 356         }
 357
 358         virtual int OnDisconnect()
 359         {
 360                 return true;
 361         }
 362
 363         // recursively send the server tree with distances as hops
 364         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 365         {
 366                 char command[1024];
 367                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 368                 {
 369                         TreeServer* recursive_server = Current->GetChild(q);
 370                         if (recursive_server != s)
 371                         {
 372                                 // :source.server SERVER server.name hops :Description
 373                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 374                                 this->WriteLine(command);
 375                                 // down to next level
 376                                 this->SendServers(recursive_server, s, hops+1);
 377                         }
 378                 }
 379         }
 380
 381         void SquitServer(TreeServer* Current)
 382         {
 383                 // recursively squit the servers attached to 'Current'
 384                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 385                 {
 386                         TreeServer* recursive_server = Current->GetChild(q);
 387                         this->SquitServer(recursive_server);
 388                 }
 389                 // Now we've whacked the kids, whack self
 390                 log(DEBUG,"Deleted %s",Current->GetName().c_str());
 391                 num_lost_servers++;
 392                 bool quittingpeople = true;
 393                 while (quittingpeople)
 394                 {
 395                         quittingpeople = false;
 396                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 397                         {
 398                                 if (!strcasecmp(u->second->server,Current->GetName().c_str()))
 399                                 {
 400                                         log(DEBUG,"Quitting user %s of server %s",u->second->nick,u->second->server);
 401                                         Srv->QuitUser(u->second,Current->GetName()+" "+std::string(Srv->GetServerName()));
 402                                         num_lost_users++;
 403                                         quittingpeople = true;
 404                                         break;
 405                                 }
 406                         }
 407                 }
 408         }
 409
 410         void Squit(TreeServer* Current,std::string reason)
 411         {
 412                 if (Current)
 413                 {
 414                         std::deque<std::string> params;
 415                         params.push_back(Current->GetName());
 416                         params.push_back(":"+reason);
 417                         DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
 418                         if (Current->GetParent() == TreeRoot)
 419                         {
 420                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
 421                         }
 422                         else
 423                         {
 424                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
 425                         }
 426                         num_lost_servers = 0;
 427                         num_lost_users = 0;
 428                         SquitServer(Current);
 429                         Current->Tidy();
 430                         Current->GetParent()->DelChild(Current);
 431                         delete Current;
 432                         WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
 433                 }
 434                 else
 435                 {
 436                         log(DEBUG,"Squit from unknown server");
 437                 }
 438         }
 439
 440         bool ForceMode(std::string source, std::deque<std::string> params)
 441         {
 442                 userrec* who = new userrec;
 443                 who->fd = FD_MAGIC_NUMBER;
 444                 if (params.size() < 2)
 445                         return true;
 446                 char* modelist[255];
 447                 for (unsigned int q = 0; q < params.size(); q++)
 448                 {
 449                         modelist[q] = (char*)params[q].c_str();
 450                 }
 451                 Srv->SendMode(modelist,params.size(),who);
 452                 DoOneToAllButSender(source,"FMODE",params,source);
 453                 delete who;
 454                 return true;
 455         }
 456
 457         bool ForceTopic(std::string source, std::deque<std::string> params)
 458         {
 459                 // FTOPIC %s %lu %s :%s
 460                 if (params.size() != 4)
 461                         return true;
 462                 std::string channel = params[0];
 463                 time_t ts = atoi(params[1].c_str());
 464                 std::string setby = params[2];
 465                 std::string topic = params[3];
 466
 467                 chanrec* c = Srv->FindChannel(channel);
 468                 if (c)
 469                 {
 470                         if ((ts >= c->topicset) || (!*c->topic))
 471                         {
 472                                 strlcpy(c->topic,topic.c_str(),MAXTOPIC);
 473                                 strlcpy(c->setby,setby.c_str(),NICKMAX);
 474                                 c->topicset = ts;
 475                                 WriteChannelWithServ((char*)source.c_str(), c, "TOPIC %s :%s", c->name, c->topic);
 476                         }
 477
 478                 }
 479
 480                 // all done, send it on its way
 481                 params[3] = ":" + params[3];
 482                 DoOneToAllButSender(source,"FTOPIC",params,source);
 483
 484                 return true;
 485         }
 486
 487         bool ForceJoin(std::string source, std::deque<std::string> params)
 488         {
 489                 if (params.size() < 1)
 490                         return true;
 491                 for (unsigned int channelnum = 0; channelnum < params.size(); channelnum++)
 492                 {
 493                         // process one channel at a time, applying modes.
 494                         char* channel = (char*)params[channelnum].c_str();
 495                         char permissions = *channel;
 496                         char* mode = NULL;
 497                         switch (permissions)
 498                         {
 499                                 case '@':
 500                                         channel++;
 501                                         mode = "+o";
 502                                 break;
 503                                 case '%':
 504                                         channel++;
 505                                         mode = "+h";
 506                                 break;
 507                                 case '+':
 508                                         channel++;
 509                                         mode = "+v";
 510                                 break;
 511                         }
 512                         userrec* who = Srv->FindNick(source);
 513                         if (who)
 514                         {
 515                                 char* key = "";
 516                                 chanrec* chan = Srv->FindChannel(channel);
 517                                 if ((chan) && (*chan->key))
 518                                 {
 519                                         key = chan->key;
 520                                 }
 521                                 Srv->JoinUserToChannel(who,channel,key);
 522                                 if (mode)
 523                                 {
 524                                         char* modelist[3];
 525                                         modelist[0] = channel;
 526                                         modelist[1] = mode;
 527                                         modelist[2] = who->nick;
 528                                         Srv->SendMode(modelist,3,who);
 529                                 }
 530                                 DoOneToAllButSender(source,"FJOIN",params,who->server);
 531                         }
 532                 }
 533                 return true;
 534         }
 535
 536         bool IntroduceClient(std::string source, std::deque<std::string> params)
 537         {
 538                 if (params.size() < 8)
 539                         return true;
 540                 // NICK age nick host dhost ident +modes ip :gecos
 541                 //       0   1    2    3      4     5    6   7
 542                 std::string nick = params[1];
 543                 std::string host = params[2];
 544                 std::string dhost = params[3];
 545                 std::string ident = params[4];
 546                 time_t age = atoi(params[0].c_str());
 547                 std::string modes = params[5];
 548                 if (*(modes.c_str()) == '+')
 549                 {
 550                         char* m = (char*)modes.c_str();
 551                         m++;
 552                         modes = m;
 553                 }
 554                 std::string ip = params[6];
 555                 std::string gecos = params[7];
 556                 char* tempnick = (char*)nick.c_str();
 557                 log(DEBUG,"Introduce client %s!%s@%s",tempnick,ident.c_str(),host.c_str());
 558
 559                 user_hash::iterator iter;
 560                 iter = clientlist.find(tempnick);
 561                 if (iter != clientlist.end())
 562                 {
 563                         // nick collision
 564                         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);
 565                         if (age <= iter->second->age)
 566                         {
 567                                 log (DEBUG,"*** COLLISION: Remote client is older");
 568                                 // remote client is older
 569                                 // if hosts are identical, kill the remote,
 570                                 // else kill the local. We must send KILL for
 571                                 // removal of remote users.
 572                                 if (!strcmp(iter->second->host,host.c_str()))
 573                                 {
 574                                         // kill the remote by sending KILL,
 575                                         // and ABORT to stop it being introduced here.
 576                                         log(DEBUG,"**** LOCATION ONE");
 577                                         this->WriteLine(":"+Srv->GetServerName()+" KILL "+tempnick+" :Killed (Nickname collision from "+Srv->GetServerName()+")");
 578                                         return true;
 579                                 }
 580                                 else
 581                                 {
 582                                         log(DEBUG,"*** LOCATION TWO");
 583                                         // kill our local and continue to let the remote be introduced
 584                                         Srv->QuitUser(iter->second,"Killed (Nickname collision from "+source+")");
 585                                 }
 586                         }
 587                         else
 588                         {
 589                                 log(DEBUG,"*** COLLISION: Remote client is newer");
 590                                 // remote is newer, kill it and bail to stop it being introduced
 591                                 this->WriteLine(":"+Srv->GetServerName()+" KILL "+tempnick+" :Killed (Nickname collision from "+Srv->GetServerName()+")");
 592                                 log(DEBUG,"*** COLLIDE COMPLETED");
 593                                 return true;
 594                         }
 595                 }
 596
 597                 clientlist[tempnick] = new userrec();
 598                 clientlist[tempnick]->fd = FD_MAGIC_NUMBER;
 599                 strlcpy(clientlist[tempnick]->nick, tempnick,NICKMAX);
 600                 strlcpy(clientlist[tempnick]->host, host.c_str(),160);
 601                 strlcpy(clientlist[tempnick]->dhost, dhost.c_str(),160);
 602                 clientlist[tempnick]->server = (char*)FindServerNamePtr(source.c_str());
 603                 strlcpy(clientlist[tempnick]->ident, ident.c_str(),IDENTMAX);
 604                 strlcpy(clientlist[tempnick]->fullname, gecos.c_str(),MAXGECOS);
 605                 clientlist[tempnick]->registered = 7;
 606                 clientlist[tempnick]->signon = age;
 607                 strlcpy(clientlist[tempnick]->ip,ip.c_str(),16);
 608                 for (int i = 0; i < MAXCHANS; i++)
 609                 {
 610                         clientlist[tempnick]->chans[i].channel = NULL;
 611                         clientlist[tempnick]->chans[i].uc_modes = 0;
 612                 }
 613                 params[7] = ":" + params[7];
 614                 DoOneToAllButSender(source,"NICK",params,source);
 615                 return true;
 616         }
 617
 618         void SendChannelModes(TreeServer* Current)
 619         {
 620                 char data[MAXBUF];
 621                 for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 622                 {
 623                         snprintf(data,MAXBUF,":%s FMODE %s +%s",Srv->GetServerName().c_str(),c->second->name,chanmodes(c->second));
 624                         this->WriteLine(data);
 625                         if (*c->second->topic)
 626                         {
 627                                 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);
 628                                 this->WriteLine(data);
 629                         }
 630                         for (BanList::iterator b = c->second->bans.begin(); b != c->second->bans.end(); b++)
 631                         {
 632                                 snprintf(data,MAXBUF,":%s FMODE %s +b %s",Srv->GetServerName().c_str(),c->second->name,b->data);
 633                                 this->WriteLine(data);
 634                         }
 635                 }
 636         }
 637
 638         // send all users and their channels
 639         void SendUsers(TreeServer* Current)
 640         {
 641                 char data[MAXBUF];
 642                 for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 643                 {
 644                         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);
 645                         this->WriteLine(data);
 646                         if (strchr(u->second->modes,'o'))
 647                         {
 648                                 this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
 649                         }
 650                         char* chl = chlist(u->second,u->second);
 651                         if (*chl)
 652                         {
 653                                 this->WriteLine(":"+std::string(u->second->nick)+" FJOIN "+std::string(chl));
 654                         }
 655                 }
 656         }
 657
 658         void DoBurst(TreeServer* s)
 659         {
 660                 log(DEBUG,"Beginning network burst");
 661                 Srv->SendOpers("*** Bursting to "+s->GetName()+".");
 662                 this->WriteLine("BURST");
 663                 // Send server tree
 664                 this->SendServers(TreeRoot,s,1);
 665                 // Send users and their channels
 666                 this->SendUsers(s);
 667                 // TODO: Send everything else (channel modes etc)
 668                 this->SendChannelModes(s);
 669                 this->WriteLine("ENDBURST");
 670         }
 671
 672         virtual bool OnDataReady()
 673         {
 674                 char* data = this->Read();
 675                 if (data)
 676                 {
 677                         this->in_buffer += data;
 678                         while (in_buffer.find("\n") != std::string::npos)
 679                         {
 680                                 char* line = (char*)in_buffer.c_str();
 681                                 std::string ret = "";
 682                                 while ((*line != '\n') && (strlen(line)))
 683                                 {
 684                                         ret = ret + *line;
 685                                         line++;
 686                                 }
 687                                 if ((*line == '\n') || (*line == '\r'))
 688                                         line++;
 689                                 in_buffer = line;
 690                                 if (!this->ProcessLine(ret))
 691                                 {
 692                                         return false;
 693                                 }
 694                         }
 695                 }
 696                 return (data != NULL);
 697         }
 698
 699         int WriteLine(std::string line)
 700         {
 701                 return this->Write(line + "\r\n");
 702         }
 703
 704         bool Error(std::deque<std::string> params)
 705         {
 706                 if (params.size() < 1)
 707                         return false;
 708                 std::string Errmsg = params[0];
 709                 std::string SName = myhost;
 710                 if (InboundServerName != "")
 711                 {
 712                         SName = InboundServerName;
 713                 }
 714                 Srv->SendOpers("*** ERROR from "+SName+": "+Errmsg);
 715                 // we will return false to cause the socket to close.
 716                 return false;
 717         }
 718
 719         bool OperType(std::string prefix, std::deque<std::string> params)
 720         {
 721                 if (params.size() != 1)
 722                         return true;
 723                 std::string opertype = params[0];
 724                 userrec* u = Srv->FindNick(prefix);
 725                 if (u)
 726                 {
 727                         strlcpy(u->oper,opertype.c_str(),NICKMAX);
 728                         if (!strchr(u->modes,'o'))
 729                         {
 730                                 strcat(u->modes,"o");
 731                         }
 732                         DoOneToAllButSender(u->server,"OPERTYPE",params,u->server);
 733                 }
 734                 return true;
 735         }
 736
 737         bool RemoteKill(std::string prefix, std::deque<std::string> params)
 738         {
 739                 if (params.size() != 2)
 740                         return true;
 741                 std::string nick = params[0];
 742                 std::string reason = params[1];
 743                 userrec* u = Srv->FindNick(prefix);
 744                 userrec* who = Srv->FindNick(nick);
 745                 if (who)
 746                 {
 747                         std::string sourceserv = prefix;
 748                         if (u)
 749                         {
 750                                 sourceserv = u->server;
 751                         }
 752                         params[1] = ":" + params[1];
 753                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
 754                         Srv->QuitUser(who,reason);
 755                 }
 756                 return true;
 757         }
 758
 759         bool RemoteServer(std::string prefix, std::deque<std::string> params)
 760         {
 761                 if (params.size() < 4)
 762                         return false;
 763                 std::string servername = params[0];
 764                 std::string password = params[1];
 765                 int hops = atoi(params[2].c_str());
 766                 std::string description = params[3];
 767                 if (!hops)
 768                 {
 769                         this->WriteLine("ERROR :Protocol error - Introduced remote server with incorrect hopcount!");
 770                         return false;
 771                 }
 772                 TreeServer* ParentOfThis = FindServer(prefix);
 773                 if (!ParentOfThis)
 774                 {
 775                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
 776                         return false;
 777                 }
 778                 TreeServer* Node = new TreeServer(servername,description,ParentOfThis,NULL);
 779                 ParentOfThis->AddChild(Node);
 780                 params[3] = ":" + params[3];
 781                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
 782                 Srv->SendOpers("*** Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
 783                 return true;
 784         }
 785
 786         bool Outbound_Reply_Server(std::deque<std::string> params)
 787         {
 788                 if (params.size() < 4)
 789                         return false;
 790                 std::string servername = params[0];
 791                 std::string password = params[1];
 792                 int hops = atoi(params[2].c_str());
 793                 if (hops)
 794                 {
 795                         this->WriteLine("ERROR :Server too far away for authentication");
 796                         return false;
 797                 }
 798                 std::string description = params[3];
 799                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 800                 {
 801                         if ((x->Name == servername) && (x->RecvPass == password))
 802                         {
 803                                 // Begin the sync here. this kickstarts the
 804                                 // other side, waiting in WAIT_AUTH_2 state,
 805                                 // into starting their burst, as it shows
 806                                 // that we're happy.
 807                                 this->LinkState = CONNECTED;
 808                                 // we should add the details of this server now
 809                                 // to the servers tree, as a child of the root
 810                                 // node.
 811                                 TreeServer* Node = new TreeServer(servername,description,TreeRoot,this);
 812                                 TreeRoot->AddChild(Node);
 813                                 params[3] = ":" + params[3];
 814                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,servername);
 815                                 this->DoBurst(Node);
 816                                 return true;
 817                         }
 818                 }
 819                 this->WriteLine("ERROR :Invalid credentials");
 820                 return false;
 821         }
 822
 823         bool Inbound_Server(std::deque<std::string> params)
 824         {
 825                 if (params.size() < 4)
 826                         return false;
 827                 std::string servername = params[0];
 828                 std::string password = params[1];
 829                 int hops = atoi(params[2].c_str());
 830                 if (hops)
 831                 {
 832                         this->WriteLine("ERROR :Server too far away for authentication");
 833                         return false;
 834                 }
 835                 std::string description = params[3];
 836                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 837                 {
 838                         if ((x->Name == servername) && (x->RecvPass == password))
 839                         {
 840                                 Srv->SendOpers("*** Verified incoming server connection from \002"+servername+"\002["+this->GetIP()+"] ("+description+")");
 841                                 this->InboundServerName = servername;
 842                                 this->InboundDescription = description;
 843                                 // this is good. Send our details: Our server name and description and hopcount of 0,
 844                                 // along with the sendpass from this block.
 845                                 this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 846                                 // move to the next state, we are now waiting for THEM.
 847                                 this->LinkState = WAIT_AUTH_2;
 848                                 return true;
 849                         }
 850                 }
 851                 this->WriteLine("ERROR :Invalid credentials");
 852                 return false;
 853         }
 854
 855         std::deque<std::string> Split(std::string line, bool stripcolon)
 856         {
 857                 std::deque<std::string> n;
 858                 std::stringstream s(line);
 859                 std::string param = "";
 860                 n.clear();
 861                 int item = 0;
 862                 while (!s.eof())
 863                 {
 864                         s >> param;
 865                         if ((param != "") && (param != "\n"))
 866                         {
 867                                 if ((param.c_str()[0] == ':') && (item))
 868                                 {
 869                                         char* str = (char*)param.c_str();
 870                                         str++;
 871                                         param = str;
 872                                         std::string append;
 873                                         while (!s.eof())
 874                                         {
 875                                                 append = "";
 876                                                 s >> append;
 877                                                 if (append != "")
 878                                                 {
 879                                                         param = param + " " + append;
 880                                                 }
 881                                         }
 882                                 }
 883                                 item++;
 884                                 n.push_back(param);
 885                         }
 886                 }
 887                 return n;
 888         }
 889
 890         bool ProcessLine(std::string line)
 891         {
 892                 char* l = (char*)line.c_str();
 893                 while ((strlen(l)) && (l[strlen(l)-1] == '\r') || (l[strlen(l)-1] == '\n'))
 894                         l[strlen(l)-1] = '\0';
 895                 line = l;
 896                 if (line == "")
 897                         return true;
 898                 Srv->Log(DEBUG,"inbound-line: '"+line+"'");
 899                 std::deque<std::string> params = this->Split(line,true);
 900                 std::string command = "";
 901                 std::string prefix = "";
 902                 if (((params[0].c_str())[0] == ':') && (params.size() > 1))
 903                 {
 904                         prefix = params[0];
 905                         command = params[1];
 906                         char* pref = (char*)prefix.c_str();
 907                         prefix = ++pref;
 908                         params.pop_front();
 909                         params.pop_front();
 910                 }
 911                 else
 912                 {
 913                         prefix = "";
 914                         command = params[0];
 915                         params.pop_front();
 916                 }
 917
 918                 switch (this->LinkState)
 919                 {
 920                         TreeServer* Node;
 921
 922                         case WAIT_AUTH_1:
 923                                 // Waiting for SERVER command from remote server. Server initiating
 924                                 // the connection sends the first SERVER command, listening server
 925                                 // replies with theirs if its happy, then if the initiator is happy,
 926                                 // it starts to send its net sync, which starts the merge, otherwise
 927                                 // it sends an ERROR.
 928                                 if (command == "SERVER")
 929                                 {
 930                                         return this->Inbound_Server(params);
 931                                 }
 932                                 else if (command == "ERROR")
 933                                 {
 934                                         return this->Error(params);
 935                                 }
 936                         break;
 937                         case WAIT_AUTH_2:
 938                                 // Waiting for start of other side's netmerge to say they liked our
 939                                 // password.
 940                                 if (command == "SERVER")
 941                                 {
 942                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
 943                                         // silently ignore.
 944                                         return true;
 945                                 }
 946                                 else if (command == "BURST")
 947                                 {
 948                                         this->LinkState = CONNECTED;
 949                                         Node = new TreeServer(InboundServerName,InboundDescription,TreeRoot,this);
 950                                         TreeRoot->AddChild(Node);
 951                                         params.clear();
 952                                         params.push_back(InboundServerName);
 953                                         params.push_back("*");
 954                                         params.push_back("1");
 955                                         params.push_back(":"+InboundDescription);
 956                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
 957                                         this->DoBurst(Node);
 958                                 }
 959                                 else if (command == "ERROR")
 960                                 {
 961                                         return this->Error(params);
 962                                 }
 963
 964                         break;
 965                         case LISTENER:
 966                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
 967                                 return false;
 968                         break;
 969                         case CONNECTING:
 970                                 if (command == "SERVER")
 971                                 {
 972                                         // another server we connected to, which was in WAIT_AUTH_1 state,
 973                                         // has just sent us their credentials. If we get this far, theyre
 974                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
 975                                         // if we're happy with this, we should send our netburst which
 976                                         // kickstarts the merge.
 977                                         return this->Outbound_Reply_Server(params);
 978                                 }
 979                         break;
 980                         case CONNECTED:
 981                                 // This is the 'authenticated' state, when all passwords
 982                                 // have been exchanged and anything past this point is taken
 983                                 // as gospel.
 984                                 std::string target = "";
 985                                 if ((command == "NICK") && (params.size() > 1))
 986                                 {
 987                                         return this->IntroduceClient(prefix,params);
 988                                 }
 989                                 else if (command == "FJOIN")
 990                                 {
 991                                         return this->ForceJoin(prefix,params);
 992                                 }
 993                                 else if (command == "SERVER")
 994                                 {
 995                                         return this->RemoteServer(prefix,params);
 996                                 }
 997                                 else if (command == "OPERTYPE")
 998                                 {
 999                                         return this->OperType(prefix,params);
1000                                 }
1001                                 else if (command == "FMODE")
1002                                 {
1003                                         return this->ForceMode(prefix,params);
1004                                 }
1005                                 else if (command == "KILL")
1006                                 {
1007                                         return this->RemoteKill(prefix,params);
1008                                 }
1009                                 else if (command == "FTOPIC")
1010                                 {
1011                                         return this->ForceTopic(prefix,params);
1012                                 }
1013                                 else if (command == "SQUIT")
1014                                 {
1015                                         if (params.size() == 2)
1016                                         {
1017                                                 this->Squit(FindServer(params[0]),params[1]);
1018                                         }
1019                                         return true;
1020                                 }
1021                                 else
1022                                 {
1023                                         // not a special inter-server command.
1024                                         // Emulate the actual user doing the command,
1025                                         // this saves us having a huge ugly parser.
1026                                         userrec* who = Srv->FindNick(prefix);
1027                                         std::string sourceserv = this->myhost;
1028                                         if (this->InboundServerName != "")
1029                                         {
1030                                                 sourceserv = this->InboundServerName;
1031                                         }
1032                                         if (who)
1033                                         {
1034                                                 // its a user
1035                                                 target = who->server;
1036                                                 char* strparams[127];
1037                                                 for (unsigned int q = 0; q < params.size(); q++)
1038                                                 {
1039                                                         strparams[q] = (char*)params[q].c_str();
1040                                                 }
1041                                                 log(DEBUG,"*** CALL COMMAND HANDLER FOR %s, SOURCE: '%s'",command.c_str(),who->nick);
1042                                                 Srv->CallCommandHandler(command, strparams, params.size(), who);
1043                                         }
1044                                         else
1045                                         {
1046                                                 // its not a user. Its either a server, or somethings screwed up.
1047                                                 if (IsServer(prefix))
1048                                                 {
1049                                                         target = Srv->GetServerName();
1050                                                 }
1051                                                 else
1052                                                 {
1053                                                         log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
1054                                                         return true;
1055                                                 }
1056                                         }
1057                                         return DoOneToAllButSenderRaw(line,sourceserv);
1058
1059                                 }
1060                                 return true;
1061                         break;
1062                 }
1063                 return true;
1064         }
1065
1066         virtual void OnTimeout()
1067         {
1068                 if (this->LinkState == CONNECTING)
1069                 {
1070                         Srv->SendOpers("*** CONNECT: Connection to \002"+myhost+"\002 timed out.");
1071                 }
1072         }
1073
1074         virtual void OnClose()
1075         {
1076                 // Connection closed.
1077                 // If the connection is fully up (state CONNECTED)
1078                 // then propogate a netsplit to all peers.
1079                 std::string quitserver = this->myhost;
1080                 if (this->InboundServerName != "")
1081                 {
1082                         quitserver = this->InboundServerName;
1083                 }
1084                 TreeServer* s = FindServer(quitserver);
1085                 if (s)
1086                 {
1087                         Squit(s,"Remote host closed the connection");
1088                 }
1089         }
1090
1091         virtual int OnIncomingConnection(int newsock, char* ip)
1092         {
1093                 TreeSocket* s = new TreeSocket(newsock, ip);
1094                 Srv->AddSocket(s);
1095                 return true;
1096         }
1097 };
1098
1099 bool DoOneToAllButSenderRaw(std::string data,std::string omit)
1100 {
1101         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1102         {
1103                 TreeServer* Route = TreeRoot->GetChild(x);
1104                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (BestRouteTo(omit) != Route))
1105                 {
1106                         TreeSocket* Sock = Route->GetSocket();
1107                         log(DEBUG,"Sending RAW to %s",Route->GetName().c_str());
1108                         Sock->WriteLine(data);
1109                 }
1110         }
1111         return true;
1112 }
1113
1114 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> params, std::string omit)
1115 {
1116         log(DEBUG,"ALLBUTONE: Comes from %s SHOULD NOT go back to %s",prefix.c_str(),omit.c_str());
1117         // TODO: Special stuff with privmsg and notice
1118         std::string FullLine = ":" + prefix + " " + command;
1119         for (unsigned int x = 0; x < params.size(); x++)
1120         {
1121                 FullLine = FullLine + " " + params[x];
1122         }
1123         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1124         {
1125                 TreeServer* Route = TreeRoot->GetChild(x);
1126                 // Send the line IF:
1127                 // The route has a socket (its a direct connection)
1128                 // The route isnt the one to be omitted
1129                 // The route isnt the path to the one to be omitted
1130                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (BestRouteTo(omit) != Route))
1131                 {
1132                         TreeSocket* Sock = Route->GetSocket();
1133                         log(DEBUG,"Sending to %s",Route->GetName().c_str());
1134                         Sock->WriteLine(FullLine);
1135                 }
1136         }
1137         return true;
1138 }
1139
1140 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> params)
1141 {
1142         std::string FullLine = ":" + prefix + " " + command;
1143         for (unsigned int x = 0; x < params.size(); x++)
1144         {
1145                 FullLine = FullLine + " " + params[x];
1146         }
1147         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1148         {
1149                 TreeServer* Route = TreeRoot->GetChild(x);
1150                 if (Route->GetSocket())
1151                 {
1152                         TreeSocket* Sock = Route->GetSocket();
1153                         Sock->WriteLine(FullLine);
1154                 }
1155         }
1156         return true;
1157 }
1158
1159 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> params, std::string target)
1160 {
1161         TreeServer* Route = BestRouteTo(target);
1162         if (Route)
1163         {
1164                 std::string FullLine = ":" + prefix + " " + command;
1165                 for (unsigned int x = 0; x < params.size(); x++)
1166                 {
1167                         FullLine = FullLine + " " + params[x];
1168                 }
1169                 if (Route->GetSocket())
1170                 {
1171                         TreeSocket* Sock = Route->GetSocket();
1172                         Sock->WriteLine(FullLine);
1173                 }
1174                 return true;
1175         }
1176         else
1177         {
1178                 log(DEBUG,"Could not route message with target %s: %s",target.c_str(),command.c_str());
1179                 return true;
1180         }
1181 }
1182
1183
1184 class ModuleSpanningTree : public Module
1185 {
1186         std::vector<TreeSocket*> Bindings;
1187         int line;
1188
1189  public:
1190
1191         void ReadConfiguration(bool rebind)
1192         {
1193                 if (rebind)
1194                 {
1195                         for (int j =0; j < Conf->Enumerate("bind"); j++)
1196                         {
1197                                 std::string Type = Conf->ReadValue("bind","type",j);
1198                                 std::string IP = Conf->ReadValue("bind","address",j);
1199                                 long Port = Conf->ReadInteger("bind","port",j,true);
1200                                 if (Type == "servers")
1201                                 {
1202                                         if (IP == "*")
1203                                         {
1204                                                 IP = "";
1205                                         }
1206                                         TreeSocket* listener = new TreeSocket(IP.c_str(),Port,true,10);
1207                                         if (listener->GetState() == I_LISTENING)
1208                                         {
1209                                                 Srv->AddSocket(listener);
1210                                                 Bindings.push_back(listener);
1211                                         }
1212                                         else
1213                                         {
1214                                                 log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
1215                                                 listener->Close();
1216                                                 delete listener;
1217                                         }
1218                                 }
1219                         }
1220                 }
1221                 LinkBlocks.clear();
1222                 for (int j =0; j < Conf->Enumerate("link"); j++)
1223                 {
1224                         Link L;
1225                         L.Name = Conf->ReadValue("link","name",j);
1226                         L.IPAddr = Conf->ReadValue("link","ipaddr",j);
1227                         L.Port = Conf->ReadInteger("link","port",j,true);
1228                         L.SendPass = Conf->ReadValue("link","sendpass",j);
1229                         L.RecvPass = Conf->ReadValue("link","recvpass",j);
1230                         LinkBlocks.push_back(L);
1231                         log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
1232                 }
1233         }
1234
1235         ModuleSpanningTree()
1236         {
1237                 Srv = new Server;
1238                 Conf = new ConfigReader;
1239                 Bindings.clear();
1240
1241                 // Create the root of the tree
1242                 TreeRoot = new TreeServer(Srv->GetServerName(),Srv->GetServerDescription());
1243
1244                 ReadConfiguration(true);
1245         }
1246
1247         void ShowLinks(TreeServer* Current, userrec* user, int hops)
1248         {
1249                 std::string Parent = TreeRoot->GetName();
1250                 if (Current->GetParent())
1251                 {
1252                         Parent = Current->GetParent()->GetName();
1253                 }
1254                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1255                 {
1256                         ShowLinks(Current->GetChild(q),user,hops+1);
1257                 }
1258                 WriteServ(user->fd,"364 %s %s %s :%d %s",user->nick,Current->GetName().c_str(),Parent.c_str(),hops,Current->GetDesc().c_str());
1259         }
1260
1261         void HandleLinks(char** parameters, int pcnt, userrec* user)
1262         {
1263                 ShowLinks(TreeRoot,user,0);
1264                 WriteServ(user->fd,"365 %s * :End of /LINKS list.",user->nick);
1265                 return;
1266         }
1267
1268         void HandleLusers(char** parameters, int pcnt, userrec* user)
1269         {
1270                 return;
1271         }
1272
1273         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
1274
1275         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80])
1276         {
1277                 if (line < 128)
1278                 {
1279                         for (int t = 0; t < depth; t++)
1280                         {
1281                                 matrix[line][t] = ' ';
1282                         }
1283                         strlcpy(&matrix[line][depth],Current->GetName().c_str(),80);
1284                         line++;
1285                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
1286                         {
1287                                 ShowMap(Current->GetChild(q),user,depth+2,matrix);
1288                         }
1289                 }
1290         }
1291
1292         // Ok, prepare to be confused.
1293         // After much mulling over how to approach this, it struck me that
1294         // the 'usual' way of doing a /MAP isnt the best way. Instead of
1295         // keeping track of a ton of ascii characters, and line by line
1296         // under recursion working out where to place them using multiplications
1297         // and divisons, we instead render the map onto a backplane of characters
1298         // (a character matrix), then draw the branches as a series of "L" shapes
1299         // from the nodes. This is not only friendlier on CPU it uses less stack.
1300
1301         void HandleMap(char** parameters, int pcnt, userrec* user)
1302         {
1303                 // This array represents a virtual screen which we will
1304                 // "scratch" draw to, as the console device of an irc
1305                 // client does not provide for a proper terminal.
1306                 char matrix[128][80];
1307                 for (unsigned int t = 0; t < 128; t++)
1308                 {
1309                         matrix[t][0] = '\0';
1310                 }
1311                 line = 0;
1312                 // The only recursive bit is called here.
1313                 ShowMap(TreeRoot,user,0,matrix);
1314                 // Process each line one by one. The algorithm has a limit of
1315                 // 128 servers (which is far more than a spanning tree should have
1316                 // anyway, so we're ok). This limit can be raised simply by making
1317                 // the character matrix deeper, 128 rows taking 10k of memory.
1318                 for (int l = 1; l < line; l++)
1319                 {
1320                         // scan across the line looking for the start of the
1321                         // servername (the recursive part of the algorithm has placed
1322                         // the servers at indented positions depending on what they
1323                         // are related to)
1324                         int first_nonspace = 0;
1325                         while (matrix[l][first_nonspace] == ' ')
1326                         {
1327                                 first_nonspace++;
1328                         }
1329                         first_nonspace--;
1330                         // Draw the `- (corner) section: this may be overwritten by
1331                         // another L shape passing along the same vertical pane, becoming
1332                         // a |- (branch) section instead.
1333                         matrix[l][first_nonspace] = '-';
1334                         matrix[l][first_nonspace-1] = '`';
1335                         int l2 = l - 1;
1336                         // Draw upwards until we hit the parent server, causing possibly
1337                         // other corners (`-) to become branches (|-)
1338                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
1339                         {
1340                                 matrix[l2][first_nonspace-1] = '|';
1341                                 l2--;
1342                         }
1343                 }
1344                 // dump the whole lot to the user. This is the easy bit, honest.
1345                 for (int t = 0; t < line; t++)
1346                 {
1347                         WriteServ(user->fd,"006 %s :%s",user->nick,&matrix[t][0]);
1348                 }
1349                 WriteServ(user->fd,"007 %s :End of /MAP",user->nick);
1350                 return;
1351         }
1352
1353         int HandleSquit(char** parameters, int pcnt, userrec* user)
1354         {
1355                 return 1;
1356         }
1357
1358         int HandleConnect(char** parameters, int pcnt, userrec* user)
1359         {
1360                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
1361                 {
1362                         if (Srv->MatchText(x->Name.c_str(),parameters[0]))
1363                         {
1364                                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: Connecting to server: %s (%s:%d)",user->nick,x->Name.c_str(),x->IPAddr.c_str(),x->Port);
1365                                 TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name);
1366                                 Srv->AddSocket(newsocket);
1367                                 return 1;
1368                         }
1369                 }
1370                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: No matching server could be found in the config file.",user->nick);
1371                 return 1;
1372         }
1373
1374         virtual int OnPreCommand(std::string command, char **parameters, int pcnt, userrec *user)
1375         {
1376                 if (command == "CONNECT")
1377                 {
1378                         return this->HandleConnect(parameters,pcnt,user);
1379                 }
1380                 else if (command == "SQUIT")
1381                 {
1382                         return this->HandleSquit(parameters,pcnt,user);
1383                 }
1384                 else if (command == "MAP")
1385                 {
1386                         this->HandleMap(parameters,pcnt,user);
1387                         return 1;
1388                 }
1389                 else if (command == "LUSERS")
1390                 {
1391                         this->HandleLusers(parameters,pcnt,user);
1392                         return 1;
1393                 }
1394                 else if (command == "LINKS")
1395                 {
1396                         this->HandleLinks(parameters,pcnt,user);
1397                         return 1;
1398                 }
1399                 return 0;
1400         }
1401
1402         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
1403         {
1404                 if (std::string(source->server) == Srv->GetServerName())
1405                 {
1406                         std::deque<std::string> params;
1407                         params.push_back(dest->nick);
1408                         params.push_back(channel->name);
1409                         DoOneToMany(source->nick,"INVITE",params);
1410                 }
1411         }
1412
1413         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, std::string topic)
1414         {
1415                 std::deque<std::string> params;
1416                 params.push_back(chan->name);
1417                 params.push_back(":"+topic);
1418                 DoOneToMany(user->nick,"TOPIC",params);
1419         }
1420
1421         virtual void OnUserNotice(userrec* user, void* dest, int target_type, std::string text)
1422         {
1423                 if (target_type == TYPE_USER)
1424                 {
1425                         userrec* d = (userrec*)dest;
1426                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
1427                         {
1428                                 std::deque<std::string> params;
1429                                 params.clear();
1430                                 params.push_back(d->nick);
1431                                 params.push_back(":"+text);
1432                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
1433                         }
1434                 }
1435                 else
1436                 {
1437                         if (std::string(user->server) == Srv->GetServerName())
1438                         {
1439                                 chanrec *c = (chanrec*)dest;
1440                                 std::deque<std::string> params;
1441                                 params.push_back(c->name);
1442                                 params.push_back(":"+text);
1443                                 DoOneToMany(user->nick,"NOTICE",params);
1444                         }
1445                 }
1446         }
1447
1448         virtual void OnUserMessage(userrec* user, void* dest, int target_type, std::string text)
1449         {
1450                 if (target_type == TYPE_USER)
1451                 {
1452                         // route private messages which are targetted at clients only to the server
1453                         // which needs to receive them
1454                         userrec* d = (userrec*)dest;
1455                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
1456                         {
1457                                 std::deque<std::string> params;
1458                                 params.clear();
1459                                 params.push_back(d->nick);
1460                                 params.push_back(":"+text);
1461                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
1462                         }
1463                 }
1464                 else
1465                 {
1466                         if (std::string(user->server) == Srv->GetServerName())
1467                         {
1468                                 chanrec *c = (chanrec*)dest;
1469                                 std::deque<std::string> params;
1470                                 params.push_back(c->name);
1471                                 params.push_back(":"+text);
1472                                 DoOneToMany(user->nick,"PRIVMSG",params);
1473                         }
1474                 }
1475         }
1476
1477         virtual void OnUserJoin(userrec* user, chanrec* channel)
1478         {
1479                 // Only do this for local users
1480                 if (std::string(user->server) == Srv->GetServerName())
1481                 {
1482                         log(DEBUG,"**** User on %s JOINS %s",user->server,channel->name);
1483                         std::deque<std::string> params;
1484                         params.clear();
1485                         params.push_back(channel->name);
1486                         if (*channel->key)
1487                         {
1488                                 log(DEBUG,"**** With key %s",channel->key);
1489                                 // if the channel has a key, force the join by emulating the key.
1490                                 params.push_back(channel->key);
1491                         }
1492                         DoOneToMany(user->nick,"JOIN",params);
1493                 }
1494         }
1495
1496         virtual void OnUserPart(userrec* user, chanrec* channel)
1497         {
1498                 if (std::string(user->server) == Srv->GetServerName())
1499                 {
1500                         log(DEBUG,"**** User on %s PARTS %s",user->server,channel->name);
1501                         std::deque<std::string> params;
1502                         params.clear();
1503                         params.push_back(channel->name);
1504                         DoOneToMany(user->nick,"PART",params);
1505                 }
1506         }
1507
1508         virtual void OnUserConnect(userrec* user)
1509         {
1510                 char agestr[MAXBUF];
1511                 if (std::string(user->server) == Srv->GetServerName())
1512                 {
1513                         log(DEBUG,"**** User on %s CONNECTS: %s",user->server,user->nick);
1514                         std::deque<std::string> params;
1515                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
1516                         params.clear();
1517                         params.push_back(agestr);
1518                         params.push_back(user->nick);
1519                         params.push_back(user->host);
1520                         params.push_back(user->dhost);
1521                         params.push_back(user->ident);
1522                         params.push_back("+"+std::string(user->modes));
1523                         params.push_back(user->ip);
1524                         params.push_back(":"+std::string(user->fullname));
1525                         DoOneToMany(Srv->GetServerName(),"NICK",params);
1526                 }
1527         }
1528
1529         virtual void OnUserQuit(userrec* user, std::string reason)
1530         {
1531                 if (std::string(user->server) == Srv->GetServerName())
1532                 {
1533                         log(DEBUG,"**** User on %s QUITS: %s",user->server,user->nick);
1534                         std::deque<std::string> params;
1535                         params.push_back(":"+reason);
1536                         DoOneToMany(user->nick,"QUIT",params);
1537                 }
1538         }
1539
1540         virtual void OnUserPostNick(userrec* user, std::string oldnick)
1541         {
1542                 if (std::string(user->server) == Srv->GetServerName())
1543                 {
1544                         log(DEBUG,"**** User on %s changes NICK: %s",user->server,user->nick);
1545                         std::deque<std::string> params;
1546                         params.push_back(user->nick);
1547                         DoOneToMany(oldnick,"NICK",params);
1548                 }
1549         }
1550
1551         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, std::string reason)
1552         {
1553                 if (std::string(source->server) == Srv->GetServerName())
1554                 {
1555                         log(DEBUG,"**** User on %s KICKs: %s %s",source->server,source->nick,user->nick);
1556                         std::deque<std::string> params;
1557                         params.push_back(chan->name);
1558                         params.push_back(user->nick);
1559                         params.push_back(":"+reason);
1560                         DoOneToMany(source->nick,"KICK",params);
1561                 }
1562         }
1563
1564         virtual void OnRemoteKill(userrec* source, userrec* dest, std::string reason)
1565         {
1566                 std::deque<std::string> params;
1567                 params.push_back(dest->nick);
1568                 params.push_back(":"+reason);
1569                 DoOneToMany(source->nick,"KILL",params);
1570         }
1571
1572         // note: the protocol does not allow direct umode +o except
1573         // via NICK with 8 params. sending OPERTYPE infers +o modechange
1574         // locally.
1575         virtual void OnOper(userrec* user, std::string opertype)
1576         {
1577                 if (std::string(user->server) == Srv->GetServerName())
1578                 {
1579                         std::deque<std::string> params;
1580                         params.push_back(opertype);
1581                         DoOneToMany(user->nick,"OPERTYPE",params);
1582                 }
1583         }
1584
1585         virtual void OnMode(userrec* user, void* dest, int target_type, std::string text)
1586         {
1587                 log(DEBUG,"*** ONMODE TRIGGER");
1588                 if (std::string(user->server) == Srv->GetServerName())
1589                 {
1590                         log(DEBUG,"*** LOCAL");
1591                         if (target_type == TYPE_USER)
1592                         {
1593                                 userrec* u = (userrec*)dest;
1594                                 std::deque<std::string> params;
1595                                 params.push_back(u->nick);
1596                                 params.push_back(text);
1597                                 DoOneToMany(user->nick,"MODE",params);
1598                         }
1599                         else
1600                         {
1601                                 chanrec* c = (chanrec*)dest;
1602                                 std::deque<std::string> params;
1603                                 params.push_back(c->name);
1604                                 params.push_back(text);
1605                                 DoOneToMany(user->nick,"MODE",params);
1606                         }
1607                 }
1608         }
1609
1610         virtual ~ModuleSpanningTree()
1611         {
1612                 delete Srv;
1613         }
1614
1615         virtual Version GetVersion()
1616         {
1617                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
1618         }
1619 };
1620
1621
1622 class ModuleSpanningTreeFactory : public ModuleFactory
1623 {
1624  public:
1625         ModuleSpanningTreeFactory()
1626         {
1627         }
1628
1629         ~ModuleSpanningTreeFactory()
1630         {
1631         }
1632
1633         virtual Module * CreateModule()
1634         {
1635                 return new ModuleSpanningTree;
1636         }
1637
1638 };
1639
1640
1641 extern "C" void * init_module( void )
1642 {
1643         return new ModuleSpanningTreeFactory;
1644 }
1645