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