src/modules/m_spanningtree.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  Inspire is copyright (C) 2002-2005 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 using namespace std;
  18
  19 #include <stdio.h>
  20 #include <vector>
  21 #include <deque>
  22 #include "globals.h"
  23 #include "inspircd_config.h"
  24 #ifdef GCC3
  25 #include <ext/hash_map>
  26 #else
  27 #include <hash_map>
  28 #endif
  29 #include "users.h"
  30 #include "channels.h"
  31 #include "modules.h"
  32 #include "socket.h"
  33 #include "helperfuncs.h"
  34 #include "inspircd.h"
  35 #include "inspstring.h"
  36 #include "hashcomp.h"
  37 #include "message.h"
  38
  39 #ifdef GCC3
  40 #define nspace __gnu_cxx
  41 #else
  42 #define nspace std
  43 #endif
  44
  45 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  46
  47 typedef nspace::hash_map<std::string, userrec*, nspace::hash<string>, irc::StrHashComp> user_hash;
  48 typedef nspace::hash_map<std::string, chanrec*, nspace::hash<string>, irc::StrHashComp> chan_hash;
  49
  50 extern user_hash clientlist;
  51 extern chan_hash chanlist;
  52
  53 class TreeServer;
  54 class TreeSocket;
  55
  56 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> params, std::string target);
  57 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> params, std::string omit);
  58 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> params);
  59 bool DoOneToAllButSenderRaw(std::string data,std::string omit);
  60
  61 class TreeServer
  62 {
  63         TreeServer* Parent;
  64         std::vector<TreeServer*> Children;
  65         std::string ServerName;
  66         std::string ServerDesc;
  67         std::string VersionString;
  68         int UserCount;
  69         int OperCount;
  70         TreeSocket* Socket;     // for directly connected servers this points at the socket object
  71
  72  public:
  73
  74         TreeServer()
  75         {
  76                 Parent = NULL;
  77                 ServerName = "";
  78                 ServerDesc = "";
  79                 VersionString = "";
  80                 UserCount = OperCount = 0;
  81         }
  82
  83         TreeServer(std::string Name, std::string Desc) : ServerName(Name), ServerDesc(Desc)
  84         {
  85                 Parent = NULL;
  86                 VersionString = "";
  87                 UserCount = OperCount = 0;
  88         }
  89
  90         TreeServer(std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock) : Parent(Above), ServerName(Name), ServerDesc(Desc), Socket(Sock)
  91         {
  92                 VersionString = "";
  93                 UserCount = OperCount = 0;
  94         }
  95
  96         std::string GetName()
  97         {
  98                 return this->ServerName;
  99         }
 100
 101         std::string GetDesc()
 102         {
 103                 return this->ServerDesc;
 104         }
 105
 106         std::string GetVersion()
 107         {
 108                 return this->VersionString;
 109         }
 110
 111         int GetUserCount()
 112         {
 113                 return this->UserCount;
 114         }
 115
 116         int GetOperCount()
 117         {
 118                 return this->OperCount;
 119         }
 120
 121         TreeSocket* GetSocket()
 122         {
 123                 return this->Socket;
 124         }
 125
 126         TreeServer* GetParent()
 127         {
 128                 return this->Parent;
 129         }
 130
 131         unsigned int ChildCount()
 132         {
 133                 return Children.size();
 134         }
 135
 136         TreeServer* GetChild(unsigned int n)
 137         {
 138                 if (n < Children.size())
 139                 {
 140                         return Children[n];
 141                 }
 142                 else
 143                 {
 144                         return NULL;
 145                 }
 146         }
 147
 148         void AddChild(TreeServer* Child)
 149         {
 150                 Children.push_back(Child);
 151         }
 152
 153         bool DelChild(TreeServer* Child)
 154         {
 155                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 156                 {
 157                         if (*a == Child)
 158                         {
 159                                 Children.erase(a);
 160                                 return true;
 161                         }
 162                 }
 163                 return false;
 164         }
 165
 166         // removes child nodes of this node, and of that node, etc etc
 167         bool Tidy()
 168         {
 169                 bool stillchildren = true;
 170                 while (stillchildren)
 171                 {
 172                         stillchildren = false;
 173                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 174                         {
 175                                 TreeServer* s = (TreeServer*)*a;
 176                                 s->Tidy();
 177                                 Children.erase(a);
 178                                 delete s;
 179                                 stillchildren = true;
 180                                 break;
 181                         }
 182                 }
 183                 return true;
 184         }
 185 };
 186
 187 class Link
 188 {
 189  public:
 190          std::string Name;
 191          std::string IPAddr;
 192          int Port;
 193          std::string SendPass;
 194          std::string RecvPass;
 195 };
 196
 197 /* $ModDesc: Povides a spanning tree server link protocol */
 198
 199 Server *Srv;
 200 ConfigReader *Conf;
 201 TreeServer *TreeRoot;
 202 std::vector<Link> LinkBlocks;
 203
 204 TreeServer* RouteEnumerate(TreeServer* Current, std::string ServerName)
 205 {
 206         if (Current->GetName() == ServerName)
 207                 return Current;
 208         for (unsigned int q = 0; q < Current->ChildCount(); q++)
 209         {
 210                 TreeServer* found = RouteEnumerate(Current->GetChild(q),ServerName);
 211                 if (found)
 212                 {
 213                         return found;
 214                 }
 215         }
 216         return NULL;
 217 }
 218
 219 // Returns the locally connected server we must route a
 220 // message through to reach server 'ServerName'. This
 221 // only applies to one-to-one and not one-to-many routing.
 222 TreeServer* BestRouteTo(std::string ServerName)
 223 {
 224         log(DEBUG,"Finding best route to %s",ServerName.c_str());
 225         // first, find the server by recursively walking the tree
 226         TreeServer* Found = RouteEnumerate(TreeRoot,ServerName);
 227         // did we find it? If not, they did something wrong, abort.
 228         if (!Found)
 229         {
 230                 log(DEBUG,"Failed to find %s by walking tree!",ServerName.c_str());
 231                 return NULL;
 232         }
 233         else
 234         {
 235                 // The server exists, follow its parent nodes until
 236                 // the parent of the current is 'TreeRoot', we know
 237                 // then that this is a directly-connected server.
 238                 while ((Found) && (Found->GetParent() != TreeRoot))
 239                 {
 240                         Found = Found->GetParent();
 241                 }
 242                 log(DEBUG,"Route to %s is via %s",ServerName.c_str(),Found->GetName().c_str());
 243                 return Found;
 244         }
 245 }
 246
 247 bool LookForServer(TreeServer* Current, std::string ServerName)
 248 {
 249         if (ServerName == Current->GetName())
 250                 return true;
 251         for (unsigned int q = 0; q < Current->ChildCount(); q++)
 252         {
 253                 if (LookForServer(Current->GetChild(q),ServerName))
 254                         return true;
 255         }
 256         return false;
 257 }
 258
 259 TreeServer* Found;
 260
 261 void RFindServer(TreeServer* Current, std::string ServerName)
 262 {
 263         if ((ServerName == Current->GetName()) && (!Found))
 264         {
 265                 Found = Current;
 266                 log(DEBUG,"Found server %s desc %s",Current->GetName().c_str(),Current->GetDesc().c_str());
 267                 return;
 268         }
 269         if (!Found)
 270         {
 271                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 272                 {
 273                         if (!Found)
 274                                 RFindServer(Current->GetChild(q),ServerName);
 275                 }
 276         }
 277         return;
 278 }
 279
 280 TreeServer* FindServer(std::string ServerName)
 281 {
 282         Found = NULL;
 283         RFindServer(TreeRoot,ServerName);
 284         return Found;
 285 }
 286
 287 bool IsServer(std::string ServerName)
 288 {
 289         return LookForServer(TreeRoot,ServerName);
 290 }
 291
 292 class TreeSocket : public InspSocket
 293 {
 294         std::string myhost;
 295         std::string in_buffer;
 296         ServerState LinkState;
 297         std::string InboundServerName;
 298         std::string InboundDescription;
 299         int num_lost_users;
 300         int num_lost_servers;
 301
 302  public:
 303
 304         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime)
 305                 : InspSocket(host, port, listening, maxtime)
 306         {
 307                 Srv->Log(DEBUG,"Create new listening");
 308                 myhost = host;
 309                 this->LinkState = LISTENER;
 310         }
 311
 312         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 313                 : InspSocket(host, port, listening, maxtime)
 314         {
 315                 Srv->Log(DEBUG,"Create new outbound");
 316                 myhost = ServerName;
 317                 this->LinkState = CONNECTING;
 318         }
 319
 320         TreeSocket(int newfd, char* ip)
 321                 : InspSocket(newfd, ip)
 322         {
 323                 Srv->Log(DEBUG,"Associate new inbound");
 324                 this->LinkState = WAIT_AUTH_1;
 325         }
 326
 327         virtual bool OnConnected()
 328         {
 329                 if (this->LinkState == CONNECTING)
 330                 {
 331                         Srv->SendOpers("*** Connection to "+myhost+"["+this->GetIP()+"] established.");
 332                         // we should send our details here.
 333                         // if the other side is satisfied, they send theirs.
 334                         // we do not need to change state here.
 335                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 336                         {
 337                                 if (x->Name == this->myhost)
 338                                 {
 339                                         // found who we're supposed to be connecting to, send the neccessary gubbins.
 340                                         this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 341                                         return true;
 342                                 }
 343                         }
 344                 }
 345                 log(DEBUG,"Outbound connection ERROR: Could not find the right link block!");
 346                 return true;
 347         }
 348
 349         virtual void OnError(InspSocketError e)
 350         {
 351         }
 352
 353         virtual int OnDisconnect()
 354         {
 355                 return true;
 356         }
 357
 358         // recursively send the server tree with distances as hops
 359         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 360         {
 361                 char command[1024];
 362                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 363                 {
 364                         TreeServer* recursive_server = Current->GetChild(q);
 365                         if (recursive_server != s)
 366                         {
 367                                 // :source.server SERVER server.name hops :Description
 368                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 369                                 this->WriteLine(command);
 370                                 // down to next level
 371                                 this->SendServers(recursive_server, s, hops+1);
 372                         }
 373                 }
 374         }
 375
 376         void SquitServer(TreeServer* Current)
 377         {
 378                 // recursively squit the servers attached to 'Current'
 379                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 380                 {
 381                         TreeServer* recursive_server = Current->GetChild(q);
 382                         this->SquitServer(recursive_server);
 383                 }
 384                 // Now we've whacked the kids, whack self
 385                 log(DEBUG,"Deleted %s",Current->GetName().c_str());
 386                 num_lost_servers++;
 387                 bool quittingpeople = true;
 388                 while (quittingpeople)
 389                 {
 390                         quittingpeople = false;
 391                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 392                         {
 393                                 if (!strcasecmp(u->second->server,Current->GetName().c_str()))
 394                                 {
 395                                         log(DEBUG,"Quitting user %s of server %s",u->second->nick,u->second->server);
 396                                         Srv->QuitUser(u->second,Current->GetName()+" "+std::string(Srv->GetServerName()));
 397                                         num_lost_users++;
 398                                         quittingpeople = true;
 399                                         break;
 400                                 }
 401                         }
 402                 }
 403         }
 404
 405         void Squit(TreeServer* Current,std::string reason)
 406         {
 407                 if (Current)
 408                 {
 409                         std::deque<std::string> params;
 410                         params.push_back(Current->GetName());
 411                         params.push_back(":"+reason);
 412                         DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
 413                         if (Current->GetParent() == TreeRoot)
 414                         {
 415                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
 416                         }
 417                         else
 418                         {
 419                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
 420                         }
 421                         num_lost_servers = 0;
 422                         num_lost_users = 0;
 423                         SquitServer(Current);
 424                         Current->Tidy();
 425                         Current->GetParent()->DelChild(Current);
 426                         delete Current;
 427                         WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
 428                 }
 429                 else
 430                 {
 431                         log(DEBUG,"Squit from unknown server");
 432                 }
 433         }
 434
 435         bool ForceMode(std::string source, std::deque<std::string> params)
 436         {
 437                 userrec* who = new userrec;
 438                 who->fd = FD_MAGIC_NUMBER;
 439                 if (params.size() < 2)
 440                         return true;
 441                 char* modelist[255];
 442                 for (unsigned int q = 0; q < params.size(); q++)
 443                 {
 444                         modelist[q] = (char*)params[q].c_str();
 445                 }
 446                 Srv->SendMode(modelist,params.size(),who);
 447                 DoOneToAllButSender(source,"FMODE",params,source);
 448                 delete who;
 449                 return true;
 450         }
 451
 452         bool ForceJoin(std::string source, std::deque<std::string> params)
 453         {
 454                 if (params.size() < 1)
 455                         return true;
 456                 for (unsigned int channelnum = 0; channelnum < params.size(); channelnum++)
 457                 {
 458                         // process one channel at a time, applying modes.
 459                         char* channel = (char*)params[channelnum].c_str();
 460                         char permissions = *channel;
 461                         char* mode = NULL;
 462                         switch (permissions)
 463                         {
 464                                 case '@':
 465                                         channel++;
 466                                         mode = "+o";
 467                                 break;
 468                                 case '%':
 469                                         channel++;
 470                                         mode = "+h";
 471                                 break;
 472                                 case '+':
 473                                         channel++;
 474                                         mode = "+v";
 475                                 break;
 476                         }
 477                         userrec* who = Srv->FindNick(source);
 478                         if (who)
 479                         {
 480                                 char* key = "";
 481                                 chanrec* chan = Srv->FindChannel(channel);
 482                                 if ((chan) && (*chan->key))
 483                                 {
 484                                         key = chan->key;
 485                                 }
 486                                 Srv->JoinUserToChannel(who,channel,key);
 487                                 if (mode)
 488                                 {
 489                                         char* modelist[3];
 490                                         modelist[0] = channel;
 491                                         modelist[1] = mode;
 492                                         modelist[2] = who->nick;
 493                                         Srv->SendMode(modelist,3,who);
 494                                 }
 495                                 DoOneToAllButSender(source,"FJOIN",params,who->server);
 496                         }
 497                 }
 498                 return true;
 499         }
 500
 501         bool IntroduceClient(std::string source, std::deque<std::string> params)
 502         {
 503                 if (params.size() < 8)
 504                         return true;
 505                 // NICK age nick host dhost ident +modes ip :gecos
 506                 //       0   1    2    3      4     5    6   7
 507                 std::string nick = params[1];
 508                 std::string host = params[2];
 509                 std::string dhost = params[3];
 510                 std::string ident = params[4];
 511                 time_t age = atoi(params[0].c_str());
 512                 std::string modes = params[5];
 513                 if (*(modes.c_str()) == '+')
 514                 {
 515                         char* m = (char*)modes.c_str();
 516                         m++;
 517                         modes = m;
 518                 }
 519                 std::string ip = params[6];
 520                 std::string gecos = params[7];
 521                 char* tempnick = (char*)nick.c_str();
 522                 log(DEBUG,"Introduce client %s!%s@%s",tempnick,ident.c_str(),host.c_str());
 523
 524                 user_hash::iterator iter;
 525                 iter = clientlist.find(tempnick);
 526                 if (iter != clientlist.end())
 527                 {
 528                         // nick collision
 529                         log(DEBUG,"Nick collision on %s!%s@%s",tempnick,ident.c_str(),host.c_str());
 530                         return true;
 531                 }
 532
 533                 clientlist[tempnick] = new userrec();
 534                 clientlist[tempnick]->fd = FD_MAGIC_NUMBER;
 535                 strlcpy(clientlist[tempnick]->nick, tempnick,NICKMAX);
 536                 strlcpy(clientlist[tempnick]->host, host.c_str(),160);
 537                 strlcpy(clientlist[tempnick]->dhost, dhost.c_str(),160);
 538                 clientlist[tempnick]->server = (char*)FindServerNamePtr(source.c_str());
 539                 strlcpy(clientlist[tempnick]->ident, ident.c_str(),IDENTMAX);
 540                 strlcpy(clientlist[tempnick]->fullname, gecos.c_str(),MAXGECOS);
 541                 clientlist[tempnick]->registered = 7;
 542                 clientlist[tempnick]->signon = age;
 543                 strlcpy(clientlist[tempnick]->ip,ip.c_str(),16);
 544                 for (int i = 0; i < MAXCHANS; i++)
 545                 {
 546                         clientlist[tempnick]->chans[i].channel = NULL;
 547                         clientlist[tempnick]->chans[i].uc_modes = 0;
 548                 }
 549                 DoOneToAllButSender(source,"NICK",params,source);
 550                 return true;
 551         }
 552
 553         void SendChannelModes(TreeServer* Current)
 554         {
 555                 char data[MAXBUF];
 556                 for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 557                 {
 558                         snprintf(data,MAXBUF,":%s FMODE %s +%s",Srv->GetServerName().c_str(),c->second->name,chanmodes(c->second));
 559                         this->WriteLine(data);
 560                         if (*c->second->topic)
 561                         {
 562                                 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);
 563                                 this->WriteLine(data);
 564                         }
 565                         for (BanList::iterator b = c->second->bans.begin(); b != c->second->bans.end(); b++)
 566                         {
 567                                 snprintf(data,MAXBUF,":%s FMODE %s +b %s",Srv->GetServerName().c_str(),c->second->name,b->data);
 568                                 this->WriteLine(data);
 569                         }
 570                 }
 571         }
 572
 573         // send all users and their channels
 574         void SendUsers(TreeServer* Current)
 575         {
 576                 char data[MAXBUF];
 577                 for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 578                 {
 579                         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);
 580                         this->WriteLine(data);
 581                         if (strchr(u->second->modes,'o'))
 582                         {
 583                                 this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
 584                         }
 585                         char* chl = chlist(u->second,u->second);
 586                         if (*chl)
 587                         {
 588                                 this->WriteLine(":"+std::string(u->second->nick)+" FJOIN "+std::string(chl));
 589                         }
 590                 }
 591         }
 592
 593         void DoBurst(TreeServer* s)
 594         {
 595                 log(DEBUG,"Beginning network burst");
 596                 Srv->SendOpers("*** Bursting to "+s->GetName()+".");
 597                 this->WriteLine("BURST");
 598                 // Send server tree
 599                 this->SendServers(TreeRoot,s,1);
 600                 // Send users and their channels
 601                 this->SendUsers(s);
 602                 // TODO: Send everything else (channel modes etc)
 603                 this->SendChannelModes(s);
 604                 this->WriteLine("ENDBURST");
 605         }
 606
 607         virtual bool OnDataReady()
 608         {
 609                 char* data = this->Read();
 610                 if (data)
 611                 {
 612                         this->in_buffer += data;
 613                         while (in_buffer.find("\n") != std::string::npos)
 614                         {
 615                                 char* line = (char*)in_buffer.c_str();
 616                                 std::string ret = "";
 617                                 while ((*line != '\n') && (strlen(line)))
 618                                 {
 619                                         ret = ret + *line;
 620                                         line++;
 621                                 }
 622                                 if ((*line == '\n') || (*line == '\r'))
 623                                         line++;
 624                                 in_buffer = line;
 625                                 if (!this->ProcessLine(ret))
 626                                 {
 627                                         return false;
 628                                 }
 629                         }
 630                 }
 631                 return (data != NULL);
 632         }
 633
 634         int WriteLine(std::string line)
 635         {
 636                 return this->Write(line + "\r\n");
 637         }
 638
 639         bool Error(std::deque<std::string> params)
 640         {
 641                 if (params.size() < 1)
 642                         return false;
 643                 std::string Errmsg = params[0];
 644                 std::string SName = myhost;
 645                 if (InboundServerName != "")
 646                 {
 647                         SName = InboundServerName;
 648                 }
 649                 Srv->SendOpers("*** ERROR from "+SName+": "+Errmsg);
 650                 // we will return false to cause the socket to close.
 651                 return false;
 652         }
 653
 654         bool OperType(std::string prefix, std::deque<std::string> params)
 655         {
 656                 if (params.size() != 1)
 657                         return true;
 658                 std::string opertype = params[0];
 659                 userrec* u = Srv->FindNick(prefix);
 660                 if (u)
 661                 {
 662                         strlcpy(u->oper,opertype.c_str(),NICKMAX);
 663                         if (!strchr(u->modes,'o'))
 664                         {
 665                                 strcat(u->modes,"o");
 666                         }
 667                         DoOneToAllButSender(u->server,"OPERTYPE",params,u->server);
 668                 }
 669                 return true;
 670         }
 671
 672         bool RemoteServer(std::string prefix, std::deque<std::string> params)
 673         {
 674                 if (params.size() < 4)
 675                         return false;
 676                 std::string servername = params[0];
 677                 std::string password = params[1];
 678                 int hops = atoi(params[2].c_str());
 679                 std::string description = params[3];
 680                 if (!hops)
 681                 {
 682                         this->WriteLine("ERROR :Protocol error - Introduced remote server with incorrect hopcount!");
 683                         return false;
 684                 }
 685                 TreeServer* ParentOfThis = FindServer(prefix);
 686                 if (!ParentOfThis)
 687                 {
 688                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
 689                         return false;
 690                 }
 691                 TreeServer* Node = new TreeServer(servername,description,ParentOfThis,NULL);
 692                 ParentOfThis->AddChild(Node);
 693                 params[3] = ":" + params[3];
 694                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
 695                 Srv->SendOpers("*** Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
 696                 return true;
 697         }
 698
 699         bool Outbound_Reply_Server(std::deque<std::string> params)
 700         {
 701                 if (params.size() < 4)
 702                         return false;
 703                 std::string servername = params[0];
 704                 std::string password = params[1];
 705                 int hops = atoi(params[2].c_str());
 706                 if (hops)
 707                 {
 708                         this->WriteLine("ERROR :Server too far away for authentication");
 709                         return false;
 710                 }
 711                 std::string description = params[3];
 712                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 713                 {
 714                         if ((x->Name == servername) && (x->RecvPass == password))
 715                         {
 716                                 // Begin the sync here. this kickstarts the
 717                                 // other side, waiting in WAIT_AUTH_2 state,
 718                                 // into starting their burst, as it shows
 719                                 // that we're happy.
 720                                 this->LinkState = CONNECTED;
 721                                 // we should add the details of this server now
 722                                 // to the servers tree, as a child of the root
 723                                 // node.
 724                                 TreeServer* Node = new TreeServer(servername,description,TreeRoot,this);
 725                                 TreeRoot->AddChild(Node);
 726                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,servername);
 727                                 this->DoBurst(Node);
 728                                 return true;
 729                         }
 730                 }
 731                 this->WriteLine("ERROR :Invalid credentials");
 732                 return false;
 733         }
 734
 735         bool Inbound_Server(std::deque<std::string> params)
 736         {
 737                 if (params.size() < 4)
 738                         return false;
 739                 std::string servername = params[0];
 740                 std::string password = params[1];
 741                 int hops = atoi(params[2].c_str());
 742                 if (hops)
 743                 {
 744                         this->WriteLine("ERROR :Server too far away for authentication");
 745                         return false;
 746                 }
 747                 std::string description = params[3];
 748                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 749                 {
 750                         if ((x->Name == servername) && (x->RecvPass == password))
 751                         {
 752                                 Srv->SendOpers("*** Verified incoming server connection from \002"+servername+"\002["+this->GetIP()+"] ("+description+")");
 753                                 this->InboundServerName = servername;
 754                                 this->InboundDescription = description;
 755                                 // this is good. Send our details: Our server name and description and hopcount of 0,
 756                                 // along with the sendpass from this block.
 757                                 this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 758                                 // move to the next state, we are now waiting for THEM.
 759                                 this->LinkState = WAIT_AUTH_2;
 760                                 return true;
 761                         }
 762                 }
 763                 this->WriteLine("ERROR :Invalid credentials");
 764                 return false;
 765         }
 766
 767         std::deque<std::string> Split(std::string line, bool stripcolon)
 768         {
 769                 std::deque<std::string> n;
 770                 std::stringstream s(line);
 771                 std::string param = "";
 772                 n.clear();
 773                 int item = 0;
 774                 while (!s.eof())
 775                 {
 776                         s >> param;
 777                         if ((param != "") && (param != "\n"))
 778                         {
 779                                 if ((param.c_str()[0] == ':') && (item))
 780                                 {
 781                                         char* str = (char*)param.c_str();
 782                                         str++;
 783                                         param = str;
 784                                         std::string append;
 785                                         while (!s.eof())
 786                                         {
 787                                                 append = "";
 788                                                 s >> append;
 789                                                 if (append != "")
 790                                                 {
 791                                                         param = param + " " + append;
 792                                                 }
 793                                         }
 794                                 }
 795                                 item++;
 796                                 n.push_back(param);
 797                         }
 798                 }
 799                 return n;
 800         }
 801
 802         bool ProcessLine(std::string line)
 803         {
 804                 char* l = (char*)line.c_str();
 805                 while ((strlen(l)) && (l[strlen(l)-1] == '\r') || (l[strlen(l)-1] == '\n'))
 806                         l[strlen(l)-1] = '\0';
 807                 line = l;
 808                 if (line == "")
 809                         return true;
 810                 Srv->Log(DEBUG,"inbound-line: '"+line+"'");
 811                 std::deque<std::string> params = this->Split(line,true);
 812                 std::string command = "";
 813                 std::string prefix = "";
 814                 if (((params[0].c_str())[0] == ':') && (params.size() > 1))
 815                 {
 816                         prefix = params[0];
 817                         command = params[1];
 818                         char* pref = (char*)prefix.c_str();
 819                         prefix = ++pref;
 820                         params.pop_front();
 821                         params.pop_front();
 822                 }
 823                 else
 824                 {
 825                         prefix = "";
 826                         command = params[0];
 827                         params.pop_front();
 828                 }
 829
 830                 switch (this->LinkState)
 831                 {
 832                         TreeServer* Node;
 833
 834                         case WAIT_AUTH_1:
 835                                 // Waiting for SERVER command from remote server. Server initiating
 836                                 // the connection sends the first SERVER command, listening server
 837                                 // replies with theirs if its happy, then if the initiator is happy,
 838                                 // it starts to send its net sync, which starts the merge, otherwise
 839                                 // it sends an ERROR.
 840                                 if (command == "SERVER")
 841                                 {
 842                                         return this->Inbound_Server(params);
 843                                 }
 844                                 else if (command == "ERROR")
 845                                 {
 846                                         return this->Error(params);
 847                                 }
 848                         break;
 849                         case WAIT_AUTH_2:
 850                                 // Waiting for start of other side's netmerge to say they liked our
 851                                 // password.
 852                                 if (command == "SERVER")
 853                                 {
 854                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
 855                                         // silently ignore.
 856                                         return true;
 857                                 }
 858                                 else if (command == "BURST")
 859                                 {
 860                                         this->LinkState = CONNECTED;
 861                                         Node = new TreeServer(InboundServerName,InboundDescription,TreeRoot,this);
 862                                         TreeRoot->AddChild(Node);
 863                                         params.clear();
 864                                         params.push_back(InboundServerName);
 865                                         params.push_back("*");
 866                                         params.push_back("1");
 867                                         params.push_back(":"+InboundDescription);
 868                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
 869                                         this->DoBurst(Node);
 870                                 }
 871                                 else if (command == "ERROR")
 872                                 {
 873                                         return this->Error(params);
 874                                 }
 875
 876                         break;
 877                         case LISTENER:
 878                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
 879                                 return false;
 880                         break;
 881                         case CONNECTING:
 882                                 if (command == "SERVER")
 883                                 {
 884                                         // another server we connected to, which was in WAIT_AUTH_1 state,
 885                                         // has just sent us their credentials. If we get this far, theyre
 886                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
 887                                         // if we're happy with this, we should send our netburst which
 888                                         // kickstarts the merge.
 889                                         return this->Outbound_Reply_Server(params);
 890                                 }
 891                         break;
 892                         case CONNECTED:
 893                                 // This is the 'authenticated' state, when all passwords
 894                                 // have been exchanged and anything past this point is taken
 895                                 // as gospel.
 896                                 std::string target = "";
 897                                 if ((command == "NICK") && (params.size() > 1))
 898                                 {
 899                                         return this->IntroduceClient(prefix,params);
 900                                 }
 901                                 else if (command == "FJOIN")
 902                                 {
 903                                         return this->ForceJoin(prefix,params);
 904                                 }
 905                                 else if (command == "SERVER")
 906                                 {
 907                                         return this->RemoteServer(prefix,params);
 908                                 }
 909                                 else if (command == "OPERTYPE")
 910                                 {
 911                                         return this->OperType(prefix,params);
 912                                 }
 913                                 else if (command == "FMODE")
 914                                 {
 915                                         return this->ForceMode(prefix,params);
 916                                 }
 917                                 else if (command == "SQUIT")
 918                                 {
 919                                         if (params.size() == 2)
 920                                         {
 921                                                 this->Squit(FindServer(params[0]),params[1]);
 922                                         }
 923                                         return true;
 924                                 }
 925                                 else
 926                                 {
 927                                         // not a special inter-server command.
 928                                         // Emulate the actual user doing the command,
 929                                         // this saves us having a huge ugly parser.
 930                                         userrec* who = Srv->FindNick(prefix);
 931                                         std::string sourceserv = this->myhost;
 932                                         if (this->InboundServerName != "")
 933                                         {
 934                                                 sourceserv = this->InboundServerName;
 935                                         }
 936                                         if (who)
 937                                         {
 938                                                 // its a user
 939                                                 target = who->server;
 940                                                 char* strparams[127];
 941                                                 for (unsigned int q = 0; q < params.size(); q++)
 942                                                 {
 943                                                         strparams[q] = (char*)params[q].c_str();
 944                                                 }
 945                                                 log(DEBUG,"*** CALL COMMAND HANDLER FOR %s, SOURCE: '%s'",command.c_str(),who->nick);
 946                                                 Srv->CallCommandHandler(command, strparams, params.size(), who);
 947                                         }
 948                                         else
 949                                         {
 950                                                 // its not a user. Its either a server, or somethings screwed up.
 951                                                 if (IsServer(prefix))
 952                                                 {
 953                                                         target = Srv->GetServerName();
 954                                                 }
 955                                                 else
 956                                                 {
 957                                                         log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
 958                                                         return true;
 959                                                 }
 960                                         }
 961                                         return DoOneToAllButSenderRaw(line,sourceserv);
 962
 963                                 }
 964                                 return true;
 965                         break;
 966                 }
 967                 return true;
 968         }
 969
 970         virtual void OnTimeout()
 971         {
 972                 if (this->LinkState == CONNECTING)
 973                 {
 974                         Srv->SendOpers("*** CONNECT: Connection to \002"+myhost+"\002 timed out.");
 975                 }
 976         }
 977
 978         virtual void OnClose()
 979         {
 980                 // Connection closed.
 981                 // If the connection is fully up (state CONNECTED)
 982                 // then propogate a netsplit to all peers.
 983                 std::string quitserver = this->myhost;
 984                 if (this->InboundServerName != "")
 985                 {
 986                         quitserver = this->InboundServerName;
 987                 }
 988                 TreeServer* s = FindServer(quitserver);
 989                 if (s)
 990                 {
 991                         Squit(s,"Remote host closed the connection");
 992                 }
 993         }
 994
 995         virtual int OnIncomingConnection(int newsock, char* ip)
 996         {
 997                 TreeSocket* s = new TreeSocket(newsock, ip);
 998                 Srv->AddSocket(s);
 999                 return true;
1000         }
1001 };
1002
1003 bool DoOneToAllButSenderRaw(std::string data,std::string omit)
1004 {
1005         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1006         {
1007                 TreeServer* Route = TreeRoot->GetChild(x);
1008                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (BestRouteTo(omit) != Route))
1009                 {
1010                         TreeSocket* Sock = Route->GetSocket();
1011                         log(DEBUG,"Sending RAW to %s",Route->GetName().c_str());
1012                         Sock->WriteLine(data);
1013                 }
1014         }
1015         return true;
1016 }
1017
1018 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> params, std::string omit)
1019 {
1020         log(DEBUG,"ALLBUTONE: Comes from %s SHOULD NOT go back to %s",prefix.c_str(),omit.c_str());
1021         // TODO: Special stuff with privmsg and notice
1022         std::string FullLine = ":" + prefix + " " + command;
1023         for (unsigned int x = 0; x < params.size(); x++)
1024         {
1025                 FullLine = FullLine + " " + params[x];
1026         }
1027         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1028         {
1029                 TreeServer* Route = TreeRoot->GetChild(x);
1030                 // Send the line IF:
1031                 // The route has a socket (its a direct connection)
1032                 // The route isnt the one to be omitted
1033                 // The route isnt the path to the one to be omitted
1034                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (BestRouteTo(omit) != Route))
1035                 {
1036                         TreeSocket* Sock = Route->GetSocket();
1037                         log(DEBUG,"Sending to %s",Route->GetName().c_str());
1038                         Sock->WriteLine(FullLine);
1039                 }
1040         }
1041         return true;
1042 }
1043
1044 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> params)
1045 {
1046         std::string FullLine = ":" + prefix + " " + command;
1047         for (unsigned int x = 0; x < params.size(); x++)
1048         {
1049                 FullLine = FullLine + " " + params[x];
1050         }
1051         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1052         {
1053                 TreeServer* Route = TreeRoot->GetChild(x);
1054                 if (Route->GetSocket())
1055                 {
1056                         TreeSocket* Sock = Route->GetSocket();
1057                         Sock->WriteLine(FullLine);
1058                 }
1059         }
1060         return true;
1061 }
1062
1063 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> params, std::string target)
1064 {
1065         TreeServer* Route = BestRouteTo(target);
1066         if (Route)
1067         {
1068                 std::string FullLine = ":" + prefix + " " + command;
1069                 for (unsigned int x = 0; x < params.size(); x++)
1070                 {
1071                         FullLine = FullLine + " " + params[x];
1072                 }
1073                 if (Route->GetSocket())
1074                 {
1075                         TreeSocket* Sock = Route->GetSocket();
1076                         Sock->WriteLine(FullLine);
1077                 }
1078                 return true;
1079         }
1080         else
1081         {
1082                 log(DEBUG,"Could not route message with target %s: %s",target.c_str(),command.c_str());
1083                 return true;
1084         }
1085 }
1086
1087
1088 class ModuleSpanningTree : public Module
1089 {
1090         std::vector<TreeSocket*> Bindings;
1091         int line;
1092
1093  public:
1094
1095         void ReadConfiguration(bool rebind)
1096         {
1097                 if (rebind)
1098                 {
1099                         for (int j =0; j < Conf->Enumerate("bind"); j++)
1100                         {
1101                                 std::string Type = Conf->ReadValue("bind","type",j);
1102                                 std::string IP = Conf->ReadValue("bind","address",j);
1103                                 long Port = Conf->ReadInteger("bind","port",j,true);
1104                                 if (Type == "servers")
1105                                 {
1106                                         if (IP == "*")
1107                                         {
1108                                                 IP = "";
1109                                         }
1110                                         TreeSocket* listener = new TreeSocket(IP.c_str(),Port,true,10);
1111                                         if (listener->GetState() == I_LISTENING)
1112                                         {
1113                                                 Srv->AddSocket(listener);
1114                                                 Bindings.push_back(listener);
1115                                         }
1116                                         else
1117                                         {
1118                                                 log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
1119                                                 listener->Close();
1120                                                 delete listener;
1121                                         }
1122                                 }
1123                         }
1124                 }
1125                 LinkBlocks.clear();
1126                 for (int j =0; j < Conf->Enumerate("link"); j++)
1127                 {
1128                         Link L;
1129                         L.Name = Conf->ReadValue("link","name",j);
1130                         L.IPAddr = Conf->ReadValue("link","ipaddr",j);
1131                         L.Port = Conf->ReadInteger("link","port",j,true);
1132                         L.SendPass = Conf->ReadValue("link","sendpass",j);
1133                         L.RecvPass = Conf->ReadValue("link","recvpass",j);
1134                         LinkBlocks.push_back(L);
1135                         log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
1136                 }
1137         }
1138
1139         ModuleSpanningTree()
1140         {
1141                 Srv = new Server;
1142                 Conf = new ConfigReader;
1143                 Bindings.clear();
1144
1145                 // Create the root of the tree
1146                 TreeRoot = new TreeServer(Srv->GetServerName(),Srv->GetServerDescription());
1147
1148                 ReadConfiguration(true);
1149         }
1150
1151         void ShowLinks(TreeServer* Current, userrec* user, int hops)
1152         {
1153                 std::string Parent = TreeRoot->GetName();
1154                 if (Current->GetParent())
1155                 {
1156                         Parent = Current->GetParent()->GetName();
1157                 }
1158                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1159                 {
1160                         ShowLinks(Current->GetChild(q),user,hops+1);
1161                 }
1162                 WriteServ(user->fd,"364 %s %s %s :%d %s",user->nick,Current->GetName().c_str(),Parent.c_str(),hops,Current->GetDesc().c_str());
1163         }
1164
1165         void HandleLinks(char** parameters, int pcnt, userrec* user)
1166         {
1167                 ShowLinks(TreeRoot,user,0);
1168                 WriteServ(user->fd,"365 %s * :End of /LINKS list.",user->nick);
1169                 return;
1170         }
1171
1172         void HandleLusers(char** parameters, int pcnt, userrec* user)
1173         {
1174                 return;
1175         }
1176
1177         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
1178
1179         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80])
1180         {
1181                 if (line < 128)
1182                 {
1183                         for (int t = 0; t < depth; t++)
1184                         {
1185                                 matrix[line][t] = ' ';
1186                         }
1187                         strlcpy(&matrix[line][depth],Current->GetName().c_str(),80);
1188                         line++;
1189                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
1190                         {
1191                                 ShowMap(Current->GetChild(q),user,depth+2,matrix);
1192                         }
1193                 }
1194         }
1195
1196         // Ok, prepare to be confused.
1197         // After much mulling over how to approach this, it struck me that
1198         // the 'usual' way of doing a /MAP isnt the best way. Instead of
1199         // keeping track of a ton of ascii characters, and line by line
1200         // under recursion working out where to place them using multiplications
1201         // and divisons, we instead render the map onto a backplane of characters
1202         // (a character matrix), then draw the branches as a series of "L" shapes
1203         // from the nodes. This is not only friendlier on CPU it uses less stack.
1204
1205         void HandleMap(char** parameters, int pcnt, userrec* user)
1206         {
1207                 // This array represents a virtual screen which we will
1208                 // "scratch" draw to, as the console device of an irc
1209                 // client does not provide for a proper terminal.
1210                 char matrix[128][80];
1211                 for (unsigned int t = 0; t < 128; t++)
1212                 {
1213                         matrix[t][0] = '\0';
1214                 }
1215                 line = 0;
1216                 // The only recursive bit is called here.
1217                 ShowMap(TreeRoot,user,0,matrix);
1218                 // Process each line one by one. The algorithm has a limit of
1219                 // 128 servers (which is far more than a spanning tree should have
1220                 // anyway, so we're ok). This limit can be raised simply by making
1221                 // the character matrix deeper, 128 rows taking 10k of memory.
1222                 for (int l = 1; l < line; l++)
1223                 {
1224                         // scan across the line looking for the start of the
1225                         // servername (the recursive part of the algorithm has placed
1226                         // the servers at indented positions depending on what they
1227                         // are related to)
1228                         int first_nonspace = 0;
1229                         while (matrix[l][first_nonspace] == ' ')
1230                         {
1231                                 first_nonspace++;
1232                         }
1233                         first_nonspace--;
1234                         // Draw the `- (corner) section: this may be overwritten by
1235                         // another L shape passing along the same vertical pane, becoming
1236                         // a |- (branch) section instead.
1237                         matrix[l][first_nonspace] = '-';
1238                         matrix[l][first_nonspace-1] = '`';
1239                         int l2 = l - 1;
1240                         // Draw upwards until we hit the parent server, causing possibly
1241                         // other corners (`-) to become branches (|-)
1242                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
1243                         {
1244                                 matrix[l2][first_nonspace-1] = '|';
1245                                 l2--;
1246                         }
1247                 }
1248                 // dump the whole lot to the user. This is the easy bit, honest.
1249                 for (int t = 0; t < line; t++)
1250                 {
1251                         WriteServ(user->fd,"006 %s :%s",user->nick,&matrix[t][0]);
1252                 }
1253                 WriteServ(user->fd,"007 %s :End of /MAP",user->nick);
1254                 return;
1255         }
1256
1257         int HandleSquit(char** parameters, int pcnt, userrec* user)
1258         {
1259                 return 1;
1260         }
1261
1262         int HandleConnect(char** parameters, int pcnt, userrec* user)
1263         {
1264                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
1265                 {
1266                         if (Srv->MatchText(x->Name.c_str(),parameters[0]))
1267                         {
1268                                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: Connecting to server: %s (%s:%d)",user->nick,x->Name.c_str(),x->IPAddr.c_str(),x->Port);
1269                                 TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name);
1270                                 Srv->AddSocket(newsocket);
1271                                 return 1;
1272                         }
1273                 }
1274                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: No matching server could be found in the config file.",user->nick);
1275                 return 1;
1276         }
1277
1278         virtual int OnPreCommand(std::string command, char **parameters, int pcnt, userrec *user)
1279         {
1280                 if (command == "CONNECT")
1281                 {
1282                         return this->HandleConnect(parameters,pcnt,user);
1283                 }
1284                 else if (command == "SQUIT")
1285                 {
1286                         return this->HandleSquit(parameters,pcnt,user);
1287                 }
1288                 else if (command == "MAP")
1289                 {
1290                         this->HandleMap(parameters,pcnt,user);
1291                         return 1;
1292                 }
1293                 else if (command == "LUSERS")
1294                 {
1295                         this->HandleLusers(parameters,pcnt,user);
1296                         return 1;
1297                 }
1298                 else if (command == "LINKS")
1299                 {
1300                         this->HandleLinks(parameters,pcnt,user);
1301                         return 1;
1302                 }
1303                 return 0;
1304         }
1305
1306         virtual void OnUserNotice(userrec* user, void* dest, int target_type, std::string text)
1307         {
1308                 if (target_type == TYPE_USER)
1309                 {
1310                         userrec* d = (userrec*)dest;
1311                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
1312                         {
1313                                 std::deque<std::string> params;
1314                                 params.clear();
1315                                 params.push_back(d->nick);
1316                                 params.push_back(":"+text);
1317                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
1318                         }
1319                 }
1320                 else
1321                 {
1322                         if (std::string(user->server) == Srv->GetServerName())
1323                         {
1324                                 chanrec *c = (chanrec*)dest;
1325                                 std::deque<std::string> params;
1326                                 params.push_back(c->name);
1327                                 params.push_back(":"+text);
1328                                 DoOneToMany(user->nick,"NOTICE",params);
1329                         }
1330                 }
1331         }
1332
1333         virtual void OnUserMessage(userrec* user, void* dest, int target_type, std::string text)
1334         {
1335                 if (target_type == TYPE_USER)
1336                 {
1337                         // route private messages which are targetted at clients only to the server
1338                         // which needs to receive them
1339                         userrec* d = (userrec*)dest;
1340                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
1341                         {
1342                                 std::deque<std::string> params;
1343                                 params.clear();
1344                                 params.push_back(d->nick);
1345                                 params.push_back(":"+text);
1346                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
1347                         }
1348                 }
1349                 else
1350                 {
1351                         if (std::string(user->server) == Srv->GetServerName())
1352                         {
1353                                 chanrec *c = (chanrec*)dest;
1354                                 std::deque<std::string> params;
1355                                 params.push_back(c->name);
1356                                 params.push_back(":"+text);
1357                                 DoOneToMany(user->nick,"PRIVMSG",params);
1358                         }
1359                 }
1360         }
1361
1362         virtual void OnUserJoin(userrec* user, chanrec* channel)
1363         {
1364                 // Only do this for local users
1365                 if (std::string(user->server) == Srv->GetServerName())
1366                 {
1367                         log(DEBUG,"**** User on %s JOINS %s",user->server,channel->name);
1368                         std::deque<std::string> params;
1369                         params.clear();
1370                         params.push_back(channel->name);
1371                         if (*channel->key)
1372                         {
1373                                 log(DEBUG,"**** With key %s",channel->key);
1374                                 // if the channel has a key, force the join by emulating the key.
1375                                 params.push_back(channel->key);
1376                         }
1377                         DoOneToMany(user->nick,"JOIN",params);
1378                 }
1379         }
1380
1381         virtual void OnUserPart(userrec* user, chanrec* channel)
1382         {
1383                 if (std::string(user->server) == Srv->GetServerName())
1384                 {
1385                         log(DEBUG,"**** User on %s PARTS %s",user->server,channel->name);
1386                         std::deque<std::string> params;
1387                         params.clear();
1388                         params.push_back(channel->name);
1389                         DoOneToMany(user->nick,"PART",params);
1390                 }
1391         }
1392
1393         virtual void OnUserConnect(userrec* user)
1394         {
1395                 char agestr[MAXBUF];
1396                 if (std::string(user->server) == Srv->GetServerName())
1397                 {
1398                         log(DEBUG,"**** User on %s CONNECTS: %s",user->server,user->nick);
1399                         std::deque<std::string> params;
1400                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
1401                         params.clear();
1402                         params.push_back(agestr);
1403                         params.push_back(user->nick);
1404                         params.push_back(user->host);
1405                         params.push_back(user->dhost);
1406                         params.push_back(user->ident);
1407                         params.push_back("+"+std::string(user->modes));
1408                         params.push_back(user->ip);
1409                         params.push_back(":"+std::string(user->fullname));
1410                         DoOneToMany(Srv->GetServerName(),"NICK",params);
1411                 }
1412         }
1413
1414         virtual void OnUserQuit(userrec* user, std::string reason)
1415         {
1416                 if (std::string(user->server) == Srv->GetServerName())
1417                 {
1418                         log(DEBUG,"**** User on %s QUITS: %s",user->server,user->nick);
1419                         std::deque<std::string> params;
1420                         params.push_back(":"+reason);
1421                         DoOneToMany(user->nick,"QUIT",params);
1422                 }
1423         }
1424
1425         virtual void OnUserPostNick(userrec* user, std::string oldnick)
1426         {
1427                 if (std::string(user->server) == Srv->GetServerName())
1428                 {
1429                         log(DEBUG,"**** User on %s changes NICK: %s",user->server,user->nick);
1430                         std::deque<std::string> params;
1431                         params.push_back(user->nick);
1432                         DoOneToMany(oldnick,"NICK",params);
1433                 }
1434         }
1435
1436         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, std::string reason)
1437         {
1438                 if (std::string(source->server) == Srv->GetServerName())
1439                 {
1440                         log(DEBUG,"**** User on %s KICKs: %s %s",source->server,source->nick,user->nick);
1441                         std::deque<std::string> params;
1442                         params.push_back(chan->name);
1443                         params.push_back(user->nick);
1444                         params.push_back(":"+reason);
1445                         DoOneToMany(source->nick,"KICK",params);
1446                 }
1447         }
1448
1449         // note: the protocol does not allow direct umode +o except
1450         // via NICK with 8 params. sending OPERTYPE infers +o modechange
1451         // locally.
1452         virtual void OnOper(userrec* user, std::string opertype)
1453         {
1454                 if (std::string(user->server) == Srv->GetServerName())
1455                 {
1456                         std::deque<std::string> params;
1457                         params.push_back(opertype);
1458                         DoOneToMany(user->nick,"OPERTYPE",params);
1459                 }
1460         }
1461
1462         virtual void OnMode(userrec* user, void* dest, int target_type, std::string text)
1463         {
1464                 log(DEBUG,"*** ONMODE TRIGGER");
1465                 if (std::string(user->server) == Srv->GetServerName())
1466                 {
1467                         log(DEBUG,"*** LOCAL");
1468                         if (target_type == TYPE_USER)
1469                         {
1470                                 userrec* u = (userrec*)dest;
1471                                 std::deque<std::string> params;
1472                                 params.push_back(u->nick);
1473                                 params.push_back(text);
1474                                 DoOneToMany(user->nick,"MODE",params);
1475                         }
1476                         else
1477                         {
1478                                 chanrec* c = (chanrec*)dest;
1479                                 std::deque<std::string> params;
1480                                 params.push_back(c->name);
1481                                 params.push_back(text);
1482                                 DoOneToMany(user->nick,"MODE",params);
1483                         }
1484                 }
1485         }
1486
1487         virtual ~ModuleSpanningTree()
1488         {
1489                 delete Srv;
1490         }
1491
1492         virtual Version GetVersion()
1493         {
1494                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
1495         }
1496 };
1497
1498
1499 class ModuleSpanningTreeFactory : public ModuleFactory
1500 {
1501  public:
1502         ModuleSpanningTreeFactory()
1503         {
1504         }
1505
1506         ~ModuleSpanningTreeFactory()
1507         {
1508         }
1509
1510         virtual Module * CreateModule()
1511         {
1512                 return new ModuleSpanningTree;
1513         }
1514
1515 };
1516
1517
1518 extern "C" void * init_module( void )
1519 {
1520         return new ModuleSpanningTreeFactory;
1521 }
1522