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 static Module* TreeProtocolModule;
  46
  47 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  48
  49 typedef nspace::hash_map<std::string, userrec*, nspace::hash<string>, irc::StrHashComp> user_hash;
  50 typedef nspace::hash_map<std::string, chanrec*, nspace::hash<string>, irc::StrHashComp> chan_hash;
  51
  52 extern user_hash clientlist;
  53 extern chan_hash chanlist;
  54
  55 class TreeServer;
  56 class TreeSocket;
  57
  58 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> params, std::string target);
  59 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> params, std::string omit);
  60 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> params);
  61 bool DoOneToAllButSenderRaw(std::string data,std::string omit);
  62
  63 class TreeServer
  64 {
  65         TreeServer* Parent;
  66         std::vector<TreeServer*> Children;
  67         std::string ServerName;
  68         std::string ServerDesc;
  69         std::string VersionString;
  70         int UserCount;
  71         int OperCount;
  72         TreeSocket* Socket;     // for directly connected servers this points at the socket object
  73
  74  public:
  75
  76         TreeServer()
  77         {
  78                 Parent = NULL;
  79                 ServerName = "";
  80                 ServerDesc = "";
  81                 VersionString = "";
  82                 UserCount = OperCount = 0;
  83         }
  84
  85         TreeServer(std::string Name, std::string Desc) : ServerName(Name), ServerDesc(Desc)
  86         {
  87                 Parent = NULL;
  88                 VersionString = "";
  89                 UserCount = OperCount = 0;
  90         }
  91
  92         TreeServer(std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock) : Parent(Above), ServerName(Name), ServerDesc(Desc), Socket(Sock)
  93         {
  94                 VersionString = "";
  95                 UserCount = OperCount = 0;
  96         }
  97
  98         std::string GetName()
  99         {
 100                 return this->ServerName;
 101         }
 102
 103         std::string GetDesc()
 104         {
 105                 return this->ServerDesc;
 106         }
 107
 108         std::string GetVersion()
 109         {
 110                 return this->VersionString;
 111         }
 112
 113         int GetUserCount()
 114         {
 115                 return this->UserCount;
 116         }
 117
 118         int GetOperCount()
 119         {
 120                 return this->OperCount;
 121         }
 122
 123         TreeSocket* GetSocket()
 124         {
 125                 return this->Socket;
 126         }
 127
 128         TreeServer* GetParent()
 129         {
 130                 return this->Parent;
 131         }
 132
 133         unsigned int ChildCount()
 134         {
 135                 return Children.size();
 136         }
 137
 138         TreeServer* GetChild(unsigned int n)
 139         {
 140                 if (n < Children.size())
 141                 {
 142                         return Children[n];
 143                 }
 144                 else
 145                 {
 146                         return NULL;
 147                 }
 148         }
 149
 150         void AddChild(TreeServer* Child)
 151         {
 152                 Children.push_back(Child);
 153         }
 154
 155         bool DelChild(TreeServer* Child)
 156         {
 157                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 158                 {
 159                         if (*a == Child)
 160                         {
 161                                 Children.erase(a);
 162                                 return true;
 163                         }
 164                 }
 165                 return false;
 166         }
 167
 168         // removes child nodes of this node, and of that node, etc etc
 169         bool Tidy()
 170         {
 171                 bool stillchildren = true;
 172                 while (stillchildren)
 173                 {
 174                         stillchildren = false;
 175                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 176                         {
 177                                 TreeServer* s = (TreeServer*)*a;
 178                                 s->Tidy();
 179                                 Children.erase(a);
 180                                 delete s;
 181                                 stillchildren = true;
 182                                 break;
 183                         }
 184                 }
 185                 return true;
 186         }
 187 };
 188
 189 class Link
 190 {
 191  public:
 192          std::string Name;
 193          std::string IPAddr;
 194          int Port;
 195          std::string SendPass;
 196          std::string RecvPass;
 197 };
 198
 199 /* $ModDesc: Povides a spanning tree server link protocol */
 200
 201 Server *Srv;
 202 ConfigReader *Conf;
 203 TreeServer *TreeRoot;
 204 std::vector<Link> LinkBlocks;
 205
 206 TreeServer* RouteEnumerate(TreeServer* Current, std::string ServerName)
 207 {
 208         if (Current->GetName() == ServerName)
 209                 return Current;
 210         for (unsigned int q = 0; q < Current->ChildCount(); q++)
 211         {
 212                 TreeServer* found = RouteEnumerate(Current->GetChild(q),ServerName);
 213                 if (found)
 214                 {
 215                         return found;
 216                 }
 217         }
 218         return NULL;
 219 }
 220
 221 // Returns the locally connected server we must route a
 222 // message through to reach server 'ServerName'. This
 223 // only applies to one-to-one and not one-to-many routing.
 224 TreeServer* BestRouteTo(std::string ServerName)
 225 {
 226         log(DEBUG,"Finding best route to %s",ServerName.c_str());
 227         if (ServerName.c_str() == TreeRoot->GetName())
 228         {
 229                 log(DEBUG,"Cant route to myself!!!");
 230                 return NULL;
 231         }
 232         // first, find the server by recursively walking the tree
 233         TreeServer* Found = RouteEnumerate(TreeRoot,ServerName);
 234         // did we find it? If not, they did something wrong, abort.
 235         if (!Found)
 236         {
 237                 log(DEBUG,"Failed to find %s by walking tree!",ServerName.c_str());
 238                 return NULL;
 239         }
 240         else
 241         {
 242                 // The server exists, follow its parent nodes until
 243                 // the parent of the current is 'TreeRoot', we know
 244                 // then that this is a directly-connected server.
 245                 while ((Found) && (Found->GetParent() != TreeRoot))
 246                 {
 247                         Found = Found->GetParent();
 248                 }
 249                 log(DEBUG,"Route to %s is via %s",ServerName.c_str(),Found->GetName().c_str());
 250                 return Found;
 251         }
 252 }
 253
 254 bool LookForServer(TreeServer* Current, std::string ServerName)
 255 {
 256         if (ServerName == Current->GetName())
 257                 return true;
 258         for (unsigned int q = 0; q < Current->ChildCount(); q++)
 259         {
 260                 if (LookForServer(Current->GetChild(q),ServerName))
 261                         return true;
 262         }
 263         return false;
 264 }
 265
 266 TreeServer* Found;
 267
 268 void RFindServer(TreeServer* Current, std::string ServerName)
 269 {
 270         if ((ServerName == Current->GetName()) && (!Found))
 271         {
 272                 Found = Current;
 273                 log(DEBUG,"Found server %s desc %s",Current->GetName().c_str(),Current->GetDesc().c_str());
 274                 return;
 275         }
 276         if (!Found)
 277         {
 278                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 279                 {
 280                         if (!Found)
 281                                 RFindServer(Current->GetChild(q),ServerName);
 282                 }
 283         }
 284         return;
 285 }
 286
 287 TreeServer* FindServer(std::string ServerName)
 288 {
 289         Found = NULL;
 290         RFindServer(TreeRoot,ServerName);
 291         return Found;
 292 }
 293
 294 bool IsServer(std::string ServerName)
 295 {
 296         return LookForServer(TreeRoot,ServerName);
 297 }
 298
 299 class TreeSocket : public InspSocket
 300 {
 301         std::string myhost;
 302         std::string in_buffer;
 303         ServerState LinkState;
 304         std::string InboundServerName;
 305         std::string InboundDescription;
 306         int num_lost_users;
 307         int num_lost_servers;
 308
 309  public:
 310
 311         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime)
 312                 : InspSocket(host, port, listening, maxtime)
 313         {
 314                 Srv->Log(DEBUG,"Create new listening");
 315                 myhost = host;
 316                 this->LinkState = LISTENER;
 317         }
 318
 319         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 320                 : InspSocket(host, port, listening, maxtime)
 321         {
 322                 Srv->Log(DEBUG,"Create new outbound");
 323                 myhost = ServerName;
 324                 this->LinkState = CONNECTING;
 325         }
 326
 327         TreeSocket(int newfd, char* ip)
 328                 : InspSocket(newfd, ip)
 329         {
 330                 Srv->Log(DEBUG,"Associate new inbound");
 331                 this->LinkState = WAIT_AUTH_1;
 332         }
 333
 334         virtual bool OnConnected()
 335         {
 336                 if (this->LinkState == CONNECTING)
 337                 {
 338                         Srv->SendOpers("*** Connection to "+myhost+"["+this->GetIP()+"] established.");
 339                         // we should send our details here.
 340                         // if the other side is satisfied, they send theirs.
 341                         // we do not need to change state here.
 342                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 343                         {
 344                                 if (x->Name == this->myhost)
 345                                 {
 346                                         // found who we're supposed to be connecting to, send the neccessary gubbins.
 347                                         this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 348                                         return true;
 349                                 }
 350                         }
 351                 }
 352                 log(DEBUG,"Outbound connection ERROR: Could not find the right link block!");
 353                 return true;
 354         }
 355
 356         virtual void OnError(InspSocketError e)
 357         {
 358         }
 359
 360         virtual int OnDisconnect()
 361         {
 362                 return true;
 363         }
 364
 365         // recursively send the server tree with distances as hops
 366         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 367         {
 368                 char command[1024];
 369                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 370                 {
 371                         TreeServer* recursive_server = Current->GetChild(q);
 372                         if (recursive_server != s)
 373                         {
 374                                 // :source.server SERVER server.name hops :Description
 375                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 376                                 this->WriteLine(command);
 377                                 // down to next level
 378                                 this->SendServers(recursive_server, s, hops+1);
 379                         }
 380                 }
 381         }
 382
 383         void SquitServer(TreeServer* Current)
 384         {
 385                 // recursively squit the servers attached to 'Current'
 386                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 387                 {
 388                         TreeServer* recursive_server = Current->GetChild(q);
 389                         this->SquitServer(recursive_server);
 390                 }
 391                 // Now we've whacked the kids, whack self
 392                 log(DEBUG,"Deleted %s",Current->GetName().c_str());
 393                 num_lost_servers++;
 394                 bool quittingpeople = true;
 395                 while (quittingpeople)
 396                 {
 397                         quittingpeople = false;
 398                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 399                         {
 400                                 if (!strcasecmp(u->second->server,Current->GetName().c_str()))
 401                                 {
 402                                         log(DEBUG,"Quitting user %s of server %s",u->second->nick,u->second->server);
 403                                         Srv->QuitUser(u->second,Current->GetName()+" "+std::string(Srv->GetServerName()));
 404                                         num_lost_users++;
 405                                         quittingpeople = true;
 406                                         break;
 407                                 }
 408                         }
 409                 }
 410         }
 411
 412         void Squit(TreeServer* Current,std::string reason)
 413         {
 414                 if (Current)
 415                 {
 416                         std::deque<std::string> params;
 417                         params.push_back(Current->GetName());
 418                         params.push_back(":"+reason);
 419                         DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
 420                         if (Current->GetParent() == TreeRoot)
 421                         {
 422                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
 423                         }
 424                         else
 425                         {
 426                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
 427                         }
 428                         num_lost_servers = 0;
 429                         num_lost_users = 0;
 430                         SquitServer(Current);
 431                         Current->Tidy();
 432                         Current->GetParent()->DelChild(Current);
 433                         delete Current;
 434                         WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
 435                 }
 436                 else
 437                 {
 438                         log(DEBUG,"Squit from unknown server");
 439                 }
 440         }
 441
 442         bool ForceMode(std::string source, std::deque<std::string> params)
 443         {
 444                 userrec* who = new userrec;
 445                 who->fd = FD_MAGIC_NUMBER;
 446                 if (params.size() < 2)
 447                         return true;
 448                 char* modelist[255];
 449                 for (unsigned int q = 0; q < params.size(); q++)
 450                 {
 451                         modelist[q] = (char*)params[q].c_str();
 452                 }
 453                 Srv->SendMode(modelist,params.size(),who);
 454                 DoOneToAllButSender(source,"FMODE",params,source);
 455                 delete who;
 456                 return true;
 457         }
 458
 459         bool ForceTopic(std::string source, std::deque<std::string> params)
 460         {
 461                 // FTOPIC %s %lu %s :%s
 462                 if (params.size() != 4)
 463                         return true;
 464                 std::string channel = params[0];
 465                 time_t ts = atoi(params[1].c_str());
 466                 std::string setby = params[2];
 467                 std::string topic = params[3];
 468
 469                 chanrec* c = Srv->FindChannel(channel);
 470                 if (c)
 471                 {
 472                         if ((ts >= c->topicset) || (!*c->topic))
 473                         {
 474                                 strlcpy(c->topic,topic.c_str(),MAXTOPIC);
 475                                 strlcpy(c->setby,setby.c_str(),NICKMAX);
 476                                 c->topicset = ts;
 477                                 WriteChannelWithServ((char*)source.c_str(), c, "TOPIC %s :%s", c->name, c->topic);
 478                         }
 479
 480                 }
 481
 482                 // all done, send it on its way
 483                 params[3] = ":" + params[3];
 484                 DoOneToAllButSender(source,"FTOPIC",params,source);
 485
 486                 return true;
 487         }
 488
 489         bool ForceJoin(std::string source, std::deque<std::string> params)
 490         {
 491                 if (params.size() < 1)
 492                         return true;
 493                 for (unsigned int channelnum = 0; channelnum < params.size(); channelnum++)
 494                 {
 495                         // process one channel at a time, applying modes.
 496                         char* channel = (char*)params[channelnum].c_str();
 497                         char permissions = *channel;
 498                         char* mode = NULL;
 499                         switch (permissions)
 500                         {
 501                                 case '@':
 502                                         channel++;
 503                                         mode = "+o";
 504                                 break;
 505                                 case '%':
 506                                         channel++;
 507                                         mode = "+h";
 508                                 break;
 509                                 case '+':
 510                                         channel++;
 511                                         mode = "+v";
 512                                 break;
 513                         }
 514                         userrec* who = Srv->FindNick(source);
 515                         if (who)
 516                         {
 517                                 char* key = "";
 518                                 chanrec* chan = Srv->FindChannel(channel);
 519                                 if ((chan) && (*chan->key))
 520                                 {
 521                                         key = chan->key;
 522                                 }
 523                                 Srv->JoinUserToChannel(who,channel,key);
 524                                 if (mode)
 525                                 {
 526                                         char* modelist[3];
 527                                         modelist[0] = channel;
 528                                         modelist[1] = mode;
 529                                         modelist[2] = who->nick;
 530                                         Srv->SendMode(modelist,3,who);
 531                                 }
 532                                 DoOneToAllButSender(source,"FJOIN",params,who->server);
 533                         }
 534                 }
 535                 return true;
 536         }
 537
 538         bool IntroduceClient(std::string source, std::deque<std::string> params)
 539         {
 540                 if (params.size() < 8)
 541                         return true;
 542                 // NICK age nick host dhost ident +modes ip :gecos
 543                 //       0   1    2    3      4     5    6   7
 544                 std::string nick = params[1];
 545                 std::string host = params[2];
 546                 std::string dhost = params[3];
 547                 std::string ident = params[4];
 548                 time_t age = atoi(params[0].c_str());
 549                 std::string modes = params[5];
 550                 if (*(modes.c_str()) == '+')
 551                 {
 552                         char* m = (char*)modes.c_str();
 553                         m++;
 554                         modes = m;
 555                 }
 556                 std::string ip = params[6];
 557                 std::string gecos = params[7];
 558                 char* tempnick = (char*)nick.c_str();
 559                 log(DEBUG,"Introduce client %s!%s@%s",tempnick,ident.c_str(),host.c_str());
 560
 561                 user_hash::iterator iter;
 562                 iter = clientlist.find(tempnick);
 563                 if (iter != clientlist.end())
 564                 {
 565                         // nick collision
 566                         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);
 567                         this->WriteLine(":"+Srv->GetServerName()+" KILL "+tempnick+" :Nickname collision");
 568                         return true;
 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                         FOREACH_MOD OnSyncChannel(c->second,TreeProtocolModule,this);
 610                 }
 611         }
 612
 613         // send all users and their channels
 614         void SendUsers(TreeServer* Current)
 615         {
 616                 char data[MAXBUF];
 617                 for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 618                 {
 619                         if (u->second->registered == 7)
 620                         {
 621                                 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);
 622                                 this->WriteLine(data);
 623                                 if (strchr(u->second->modes,'o'))
 624                                 {
 625                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
 626                                 }
 627                                 char* chl = chlist(u->second,u->second);
 628                                 if (*chl)
 629                                 {
 630                                         this->WriteLine(":"+std::string(u->second->nick)+" FJOIN "+std::string(chl));
 631                                 }
 632                                 FOREACH_MOD OnSyncUser(u->second,TreeProtocolModule,this);
 633                         }
 634                 }
 635         }
 636
 637         void DoBurst(TreeServer* s)
 638         {
 639                 log(DEBUG,"Beginning network burst");
 640                 Srv->SendOpers("*** Bursting to "+s->GetName()+".");
 641                 this->WriteLine("BURST");
 642                 // Send server tree
 643                 this->SendServers(TreeRoot,s,1);
 644                 // Send users and their channels
 645                 this->SendUsers(s);
 646                 // TODO: Send everything else (channel modes etc)
 647                 this->SendChannelModes(s);
 648                 this->WriteLine("ENDBURST");
 649         }
 650
 651         virtual bool OnDataReady()
 652         {
 653                 char* data = this->Read();
 654                 if (data)
 655                 {
 656                         this->in_buffer += data;
 657                         while (in_buffer.find("\n") != std::string::npos)
 658                         {
 659                                 char* line = (char*)in_buffer.c_str();
 660                                 std::string ret = "";
 661                                 while ((*line != '\n') && (strlen(line)))
 662                                 {
 663                                         ret = ret + *line;
 664                                         line++;
 665                                 }
 666                                 if ((*line == '\n') || (*line == '\r'))
 667                                         line++;
 668                                 in_buffer = line;
 669                                 if (!this->ProcessLine(ret))
 670                                 {
 671                                         return false;
 672                                 }
 673                         }
 674                 }
 675                 return (data != NULL);
 676         }
 677
 678         int WriteLine(std::string line)
 679         {
 680                 return this->Write(line + "\r\n");
 681         }
 682
 683         bool Error(std::deque<std::string> params)
 684         {
 685                 if (params.size() < 1)
 686                         return false;
 687                 std::string Errmsg = params[0];
 688                 std::string SName = myhost;
 689                 if (InboundServerName != "")
 690                 {
 691                         SName = InboundServerName;
 692                 }
 693                 Srv->SendOpers("*** ERROR from "+SName+": "+Errmsg);
 694                 // we will return false to cause the socket to close.
 695                 return false;
 696         }
 697
 698         bool OperType(std::string prefix, std::deque<std::string> params)
 699         {
 700                 if (params.size() != 1)
 701                         return true;
 702                 std::string opertype = params[0];
 703                 userrec* u = Srv->FindNick(prefix);
 704                 if (u)
 705                 {
 706                         strlcpy(u->oper,opertype.c_str(),NICKMAX);
 707                         if (!strchr(u->modes,'o'))
 708                         {
 709                                 strcat(u->modes,"o");
 710                         }
 711                         DoOneToAllButSender(u->server,"OPERTYPE",params,u->server);
 712                 }
 713                 return true;
 714         }
 715
 716         bool RemoteRehash(std::string prefix, std::deque<std::string> params)
 717         {
 718                 if (params.size() < 1)
 719                         return true;
 720                 std::string servermask = params[0];
 721                 if (Srv->MatchText(Srv->GetServerName(),servermask))
 722                 {
 723                         Srv->SendOpers("*** Remote rehash initiated from server \002"+prefix+"\002.");
 724                         Srv->RehashServer();
 725                 }
 726                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
 727                 return true;
 728         }
 729
 730         bool RemoteKill(std::string prefix, std::deque<std::string> params)
 731         {
 732                 if (params.size() != 2)
 733                         return true;
 734                 std::string nick = params[0];
 735                 std::string reason = params[1];
 736                 userrec* u = Srv->FindNick(prefix);
 737                 userrec* who = Srv->FindNick(nick);
 738                 if (who)
 739                 {
 740                         std::string sourceserv = prefix;
 741                         if (u)
 742                         {
 743                                 sourceserv = u->server;
 744                         }
 745                         params[1] = ":" + params[1];
 746                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
 747                         Srv->QuitUser(who,reason);
 748                 }
 749                 return true;
 750         }
 751
 752         bool RemoteServer(std::string prefix, std::deque<std::string> params)
 753         {
 754                 if (params.size() < 4)
 755                         return false;
 756                 std::string servername = params[0];
 757                 std::string password = params[1];
 758                 // hopcount is not used for a remote server, we calculate this ourselves
 759                 std::string description = params[3];
 760                 TreeServer* ParentOfThis = FindServer(prefix);
 761                 if (!ParentOfThis)
 762                 {
 763                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
 764                         return false;
 765                 }
 766                 TreeServer* Node = new TreeServer(servername,description,ParentOfThis,NULL);
 767                 ParentOfThis->AddChild(Node);
 768                 params[3] = ":" + params[3];
 769                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
 770                 Srv->SendOpers("*** Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
 771                 return true;
 772         }
 773
 774         bool Outbound_Reply_Server(std::deque<std::string> params)
 775         {
 776                 if (params.size() < 4)
 777                         return false;
 778                 std::string servername = params[0];
 779                 std::string password = params[1];
 780                 int hops = atoi(params[2].c_str());
 781                 if (hops)
 782                 {
 783                         this->WriteLine("ERROR :Server too far away for authentication");
 784                         return false;
 785                 }
 786                 std::string description = params[3];
 787                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 788                 {
 789                         if ((x->Name == servername) && (x->RecvPass == password))
 790                         {
 791                                 // Begin the sync here. this kickstarts the
 792                                 // other side, waiting in WAIT_AUTH_2 state,
 793                                 // into starting their burst, as it shows
 794                                 // that we're happy.
 795                                 this->LinkState = CONNECTED;
 796                                 // we should add the details of this server now
 797                                 // to the servers tree, as a child of the root
 798                                 // node.
 799                                 TreeServer* Node = new TreeServer(servername,description,TreeRoot,this);
 800                                 TreeRoot->AddChild(Node);
 801                                 params[3] = ":" + params[3];
 802                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,servername);
 803                                 this->DoBurst(Node);
 804                                 return true;
 805                         }
 806                 }
 807                 this->WriteLine("ERROR :Invalid credentials");
 808                 return false;
 809         }
 810
 811         bool Inbound_Server(std::deque<std::string> params)
 812         {
 813                 if (params.size() < 4)
 814                         return false;
 815                 std::string servername = params[0];
 816                 std::string password = params[1];
 817                 int hops = atoi(params[2].c_str());
 818                 if (hops)
 819                 {
 820                         this->WriteLine("ERROR :Server too far away for authentication");
 821                         return false;
 822                 }
 823                 std::string description = params[3];
 824                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 825                 {
 826                         if ((x->Name == servername) && (x->RecvPass == password))
 827                         {
 828                                 Srv->SendOpers("*** Verified incoming server connection from \002"+servername+"\002["+this->GetIP()+"] ("+description+")");
 829                                 this->InboundServerName = servername;
 830                                 this->InboundDescription = description;
 831                                 // this is good. Send our details: Our server name and description and hopcount of 0,
 832                                 // along with the sendpass from this block.
 833                                 this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 834                                 // move to the next state, we are now waiting for THEM.
 835                                 this->LinkState = WAIT_AUTH_2;
 836                                 return true;
 837                         }
 838                 }
 839                 this->WriteLine("ERROR :Invalid credentials");
 840                 return false;
 841         }
 842
 843         std::deque<std::string> Split(std::string line, bool stripcolon)
 844         {
 845                 std::deque<std::string> n;
 846                 std::stringstream s(line);
 847                 std::string param = "";
 848                 n.clear();
 849                 int item = 0;
 850                 while (!s.eof())
 851                 {
 852                         s >> param;
 853                         if ((param != "") && (param != "\n"))
 854                         {
 855                                 if ((param.c_str()[0] == ':') && (item))
 856                                 {
 857                                         char* str = (char*)param.c_str();
 858                                         str++;
 859                                         param = str;
 860                                         std::string append;
 861                                         while (!s.eof())
 862                                         {
 863                                                 append = "";
 864                                                 s >> append;
 865                                                 if (append != "")
 866                                                 {
 867                                                         param = param + " " + append;
 868                                                 }
 869                                         }
 870                                 }
 871                                 item++;
 872                                 n.push_back(param);
 873                         }
 874                 }
 875                 return n;
 876         }
 877
 878         bool ProcessLine(std::string line)
 879         {
 880                 char* l = (char*)line.c_str();
 881                 while ((strlen(l)) && (l[strlen(l)-1] == '\r') || (l[strlen(l)-1] == '\n'))
 882                         l[strlen(l)-1] = '\0';
 883                 line = l;
 884                 if (line == "")
 885                         return true;
 886                 Srv->Log(DEBUG,"inbound-line: '"+line+"'");
 887                 std::deque<std::string> params = this->Split(line,true);
 888                 std::string command = "";
 889                 std::string prefix = "";
 890                 if (((params[0].c_str())[0] == ':') && (params.size() > 1))
 891                 {
 892                         prefix = params[0];
 893                         command = params[1];
 894                         char* pref = (char*)prefix.c_str();
 895                         prefix = ++pref;
 896                         params.pop_front();
 897                         params.pop_front();
 898                 }
 899                 else
 900                 {
 901                         prefix = "";
 902                         command = params[0];
 903                         params.pop_front();
 904                 }
 905
 906                 switch (this->LinkState)
 907                 {
 908                         TreeServer* Node;
 909
 910                         case WAIT_AUTH_1:
 911                                 // Waiting for SERVER command from remote server. Server initiating
 912                                 // the connection sends the first SERVER command, listening server
 913                                 // replies with theirs if its happy, then if the initiator is happy,
 914                                 // it starts to send its net sync, which starts the merge, otherwise
 915                                 // it sends an ERROR.
 916                                 if (command == "SERVER")
 917                                 {
 918                                         return this->Inbound_Server(params);
 919                                 }
 920                                 else if (command == "ERROR")
 921                                 {
 922                                         return this->Error(params);
 923                                 }
 924                         break;
 925                         case WAIT_AUTH_2:
 926                                 // Waiting for start of other side's netmerge to say they liked our
 927                                 // password.
 928                                 if (command == "SERVER")
 929                                 {
 930                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
 931                                         // silently ignore.
 932                                         return true;
 933                                 }
 934                                 else if (command == "BURST")
 935                                 {
 936                                         this->LinkState = CONNECTED;
 937                                         Node = new TreeServer(InboundServerName,InboundDescription,TreeRoot,this);
 938                                         TreeRoot->AddChild(Node);
 939                                         params.clear();
 940                                         params.push_back(InboundServerName);
 941                                         params.push_back("*");
 942                                         params.push_back("1");
 943                                         params.push_back(":"+InboundDescription);
 944                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
 945                                         this->DoBurst(Node);
 946                                 }
 947                                 else if (command == "ERROR")
 948                                 {
 949                                         return this->Error(params);
 950                                 }
 951
 952                         break;
 953                         case LISTENER:
 954                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
 955                                 return false;
 956                         break;
 957                         case CONNECTING:
 958                                 if (command == "SERVER")
 959                                 {
 960                                         // another server we connected to, which was in WAIT_AUTH_1 state,
 961                                         // has just sent us their credentials. If we get this far, theyre
 962                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
 963                                         // if we're happy with this, we should send our netburst which
 964                                         // kickstarts the merge.
 965                                         return this->Outbound_Reply_Server(params);
 966                                 }
 967                         break;
 968                         case CONNECTED:
 969                                 // This is the 'authenticated' state, when all passwords
 970                                 // have been exchanged and anything past this point is taken
 971                                 // as gospel.
 972                                 std::string target = "";
 973                                 if ((command == "NICK") && (params.size() > 1))
 974                                 {
 975                                         return this->IntroduceClient(prefix,params);
 976                                 }
 977                                 else if (command == "FJOIN")
 978                                 {
 979                                         return this->ForceJoin(prefix,params);
 980                                 }
 981                                 else if (command == "SERVER")
 982                                 {
 983                                         return this->RemoteServer(prefix,params);
 984                                 }
 985                                 else if (command == "OPERTYPE")
 986                                 {
 987                                         return this->OperType(prefix,params);
 988                                 }
 989                                 else if (command == "FMODE")
 990                                 {
 991                                         return this->ForceMode(prefix,params);
 992                                 }
 993                                 else if (command == "KILL")
 994                                 {
 995                                         return this->RemoteKill(prefix,params);
 996                                 }
 997                                 else if (command == "FTOPIC")
 998                                 {
 999                                         return this->ForceTopic(prefix,params);
1000                                 }
1001                                 else if (command == "REHASH")
1002                                 {
1003                                         return this->RemoteRehash(prefix,params);
1004                                 }
1005                                 else if (command == "SQUIT")
1006                                 {
1007                                         if (params.size() == 2)
1008                                         {
1009                                                 this->Squit(FindServer(params[0]),params[1]);
1010                                         }
1011                                         return true;
1012                                 }
1013                                 else
1014                                 {
1015                                         // not a special inter-server command.
1016                                         // Emulate the actual user doing the command,
1017                                         // this saves us having a huge ugly parser.
1018                                         userrec* who = Srv->FindNick(prefix);
1019                                         std::string sourceserv = this->myhost;
1020                                         if (this->InboundServerName != "")
1021                                         {
1022                                                 sourceserv = this->InboundServerName;
1023                                         }
1024                                         if (who)
1025                                         {
1026                                                 // its a user
1027                                                 target = who->server;
1028                                                 char* strparams[127];
1029                                                 for (unsigned int q = 0; q < params.size(); q++)
1030                                                 {
1031                                                         strparams[q] = (char*)params[q].c_str();
1032                                                 }
1033                                                 log(DEBUG,"*** CALL COMMAND HANDLER FOR %s, SOURCE: '%s'",command.c_str(),who->nick);
1034                                                 Srv->CallCommandHandler(command, strparams, params.size(), who);
1035                                         }
1036                                         else
1037                                         {
1038                                                 // its not a user. Its either a server, or somethings screwed up.
1039                                                 if (IsServer(prefix))
1040                                                 {
1041                                                         target = Srv->GetServerName();
1042                                                 }
1043                                                 else
1044                                                 {
1045                                                         log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
1046                                                         return true;
1047                                                 }
1048                                         }
1049                                         return DoOneToAllButSenderRaw(line,sourceserv);
1050
1051                                 }
1052                                 return true;
1053                         break;
1054                 }
1055                 return true;
1056         }
1057
1058         virtual std::string GetName()
1059         {
1060                 std::string sourceserv = this->myhost;
1061                 if (this->InboundServerName != "")
1062                 {
1063                         sourceserv = this->InboundServerName;
1064                 }
1065                 return sourceserv;
1066         }
1067
1068         virtual void OnTimeout()
1069         {
1070                 if (this->LinkState == CONNECTING)
1071                 {
1072                         Srv->SendOpers("*** CONNECT: Connection to \002"+myhost+"\002 timed out.");
1073                 }
1074         }
1075
1076         virtual void OnClose()
1077         {
1078                 // Connection closed.
1079                 // If the connection is fully up (state CONNECTED)
1080                 // then propogate a netsplit to all peers.
1081                 std::string quitserver = this->myhost;
1082                 if (this->InboundServerName != "")
1083                 {
1084                         quitserver = this->InboundServerName;
1085                 }
1086                 TreeServer* s = FindServer(quitserver);
1087                 if (s)
1088                 {
1089                         Squit(s,"Remote host closed the connection");
1090                 }
1091         }
1092
1093         virtual int OnIncomingConnection(int newsock, char* ip)
1094         {
1095                 TreeSocket* s = new TreeSocket(newsock, ip);
1096                 Srv->AddSocket(s);
1097                 return true;
1098         }
1099 };
1100
1101 bool DoOneToAllButSenderRaw(std::string data,std::string omit)
1102 {
1103         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1104         {
1105                 TreeServer* Route = TreeRoot->GetChild(x);
1106                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (BestRouteTo(omit) != Route))
1107                 {
1108                         TreeSocket* Sock = Route->GetSocket();
1109                         log(DEBUG,"Sending RAW to %s",Route->GetName().c_str());
1110                         Sock->WriteLine(data);
1111                 }
1112         }
1113         return true;
1114 }
1115
1116 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> params, std::string omit)
1117 {
1118         log(DEBUG,"ALLBUTONE: Comes from %s SHOULD NOT go back to %s",prefix.c_str(),omit.c_str());
1119         // TODO: Special stuff with privmsg and notice
1120         std::string FullLine = ":" + prefix + " " + command;
1121         for (unsigned int x = 0; x < params.size(); x++)
1122         {
1123                 FullLine = FullLine + " " + params[x];
1124         }
1125         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1126         {
1127                 TreeServer* Route = TreeRoot->GetChild(x);
1128                 // Send the line IF:
1129                 // The route has a socket (its a direct connection)
1130                 // The route isnt the one to be omitted
1131                 // The route isnt the path to the one to be omitted
1132                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (BestRouteTo(omit) != Route))
1133                 {
1134                         TreeSocket* Sock = Route->GetSocket();
1135                         log(DEBUG,"Sending to %s",Route->GetName().c_str());
1136                         Sock->WriteLine(FullLine);
1137                 }
1138         }
1139         return true;
1140 }
1141
1142 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> params)
1143 {
1144         Srv->Log(DEBUG,"ONETOMANY: "+command);
1145         std::string FullLine = ":" + prefix + " " + command;
1146         for (unsigned int x = 0; x < params.size(); x++)
1147         {
1148                 FullLine = FullLine + " " + params[x];
1149         }
1150         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1151         {
1152                 TreeServer* Route = TreeRoot->GetChild(x);
1153                 if (Route->GetSocket())
1154                 {
1155                         TreeSocket* Sock = Route->GetSocket();
1156                         Sock->WriteLine(FullLine);
1157                 }
1158         }
1159         return true;
1160 }
1161
1162 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> params, std::string target)
1163 {
1164         TreeServer* Route = BestRouteTo(target);
1165         if (Route)
1166         {
1167                 std::string FullLine = ":" + prefix + " " + command;
1168                 for (unsigned int x = 0; x < params.size(); x++)
1169                 {
1170                         FullLine = FullLine + " " + params[x];
1171                 }
1172                 if (Route->GetSocket())
1173                 {
1174                         TreeSocket* Sock = Route->GetSocket();
1175                         Sock->WriteLine(FullLine);
1176                 }
1177                 return true;
1178         }
1179         else
1180         {
1181                 log(DEBUG,"Could not route message with target %s: %s",target.c_str(),command.c_str());
1182                 return true;
1183         }
1184 }
1185
1186
1187 class ModuleSpanningTree : public Module
1188 {
1189         std::vector<TreeSocket*> Bindings;
1190         int line;
1191
1192  public:
1193
1194         void ReadConfiguration(bool rebind)
1195         {
1196                 if (rebind)
1197                 {
1198                         for (int j =0; j < Conf->Enumerate("bind"); j++)
1199                         {
1200                                 std::string Type = Conf->ReadValue("bind","type",j);
1201                                 std::string IP = Conf->ReadValue("bind","address",j);
1202                                 long Port = Conf->ReadInteger("bind","port",j,true);
1203                                 if (Type == "servers")
1204                                 {
1205                                         if (IP == "*")
1206                                         {
1207                                                 IP = "";
1208                                         }
1209                                         TreeSocket* listener = new TreeSocket(IP.c_str(),Port,true,10);
1210                                         if (listener->GetState() == I_LISTENING)
1211                                         {
1212                                                 Srv->AddSocket(listener);
1213                                                 Bindings.push_back(listener);
1214                                         }
1215                                         else
1216                                         {
1217                                                 log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
1218                                                 listener->Close();
1219                                                 delete listener;
1220                                         }
1221                                 }
1222                         }
1223                 }
1224                 LinkBlocks.clear();
1225                 for (int j =0; j < Conf->Enumerate("link"); j++)
1226                 {
1227                         Link L;
1228                         L.Name = Conf->ReadValue("link","name",j);
1229                         L.IPAddr = Conf->ReadValue("link","ipaddr",j);
1230                         L.Port = Conf->ReadInteger("link","port",j,true);
1231                         L.SendPass = Conf->ReadValue("link","sendpass",j);
1232                         L.RecvPass = Conf->ReadValue("link","recvpass",j);
1233                         LinkBlocks.push_back(L);
1234                         log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
1235                 }
1236         }
1237
1238         ModuleSpanningTree()
1239         {
1240                 Srv = new Server;
1241                 Conf = new ConfigReader;
1242                 Bindings.clear();
1243
1244                 // Create the root of the tree
1245                 TreeRoot = new TreeServer(Srv->GetServerName(),Srv->GetServerDescription());
1246
1247                 ReadConfiguration(true);
1248         }
1249
1250         void ShowLinks(TreeServer* Current, userrec* user, int hops)
1251         {
1252                 std::string Parent = TreeRoot->GetName();
1253                 if (Current->GetParent())
1254                 {
1255                         Parent = Current->GetParent()->GetName();
1256                 }
1257                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1258                 {
1259                         ShowLinks(Current->GetChild(q),user,hops+1);
1260                 }
1261                 WriteServ(user->fd,"364 %s %s %s :%d %s",user->nick,Current->GetName().c_str(),Parent.c_str(),hops,Current->GetDesc().c_str());
1262         }
1263
1264         void HandleLinks(char** parameters, int pcnt, userrec* user)
1265         {
1266                 ShowLinks(TreeRoot,user,0);
1267                 WriteServ(user->fd,"365 %s * :End of /LINKS list.",user->nick);
1268                 return;
1269         }
1270
1271         void HandleLusers(char** parameters, int pcnt, userrec* user)
1272         {
1273                 return;
1274         }
1275
1276         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
1277
1278         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80])
1279         {
1280                 if (line < 128)
1281                 {
1282                         for (int t = 0; t < depth; t++)
1283                         {
1284                                 matrix[line][t] = ' ';
1285                         }
1286                         strlcpy(&matrix[line][depth],Current->GetName().c_str(),80);
1287                         line++;
1288                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
1289                         {
1290                                 ShowMap(Current->GetChild(q),user,depth+2,matrix);
1291                         }
1292                 }
1293         }
1294
1295         // Ok, prepare to be confused.
1296         // After much mulling over how to approach this, it struck me that
1297         // the 'usual' way of doing a /MAP isnt the best way. Instead of
1298         // keeping track of a ton of ascii characters, and line by line
1299         // under recursion working out where to place them using multiplications
1300         // and divisons, we instead render the map onto a backplane of characters
1301         // (a character matrix), then draw the branches as a series of "L" shapes
1302         // from the nodes. This is not only friendlier on CPU it uses less stack.
1303
1304         void HandleMap(char** parameters, int pcnt, userrec* user)
1305         {
1306                 // This array represents a virtual screen which we will
1307                 // "scratch" draw to, as the console device of an irc
1308                 // client does not provide for a proper terminal.
1309                 char matrix[128][80];
1310                 for (unsigned int t = 0; t < 128; t++)
1311                 {
1312                         matrix[t][0] = '\0';
1313                 }
1314                 line = 0;
1315                 // The only recursive bit is called here.
1316                 ShowMap(TreeRoot,user,0,matrix);
1317                 // Process each line one by one. The algorithm has a limit of
1318                 // 128 servers (which is far more than a spanning tree should have
1319                 // anyway, so we're ok). This limit can be raised simply by making
1320                 // the character matrix deeper, 128 rows taking 10k of memory.
1321                 for (int l = 1; l < line; l++)
1322                 {
1323                         // scan across the line looking for the start of the
1324                         // servername (the recursive part of the algorithm has placed
1325                         // the servers at indented positions depending on what they
1326                         // are related to)
1327                         int first_nonspace = 0;
1328                         while (matrix[l][first_nonspace] == ' ')
1329                         {
1330                                 first_nonspace++;
1331                         }
1332                         first_nonspace--;
1333                         // Draw the `- (corner) section: this may be overwritten by
1334                         // another L shape passing along the same vertical pane, becoming
1335                         // a |- (branch) section instead.
1336                         matrix[l][first_nonspace] = '-';
1337                         matrix[l][first_nonspace-1] = '`';
1338                         int l2 = l - 1;
1339                         // Draw upwards until we hit the parent server, causing possibly
1340                         // other corners (`-) to become branches (|-)
1341                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
1342                         {
1343                                 matrix[l2][first_nonspace-1] = '|';
1344                                 l2--;
1345                         }
1346                 }
1347                 // dump the whole lot to the user. This is the easy bit, honest.
1348                 for (int t = 0; t < line; t++)
1349                 {
1350                         WriteServ(user->fd,"006 %s :%s",user->nick,&matrix[t][0]);
1351                 }
1352                 WriteServ(user->fd,"007 %s :End of /MAP",user->nick);
1353                 return;
1354         }
1355
1356         int HandleSquit(char** parameters, int pcnt, userrec* user)
1357         {
1358                 return 1;
1359         }
1360
1361         int HandleConnect(char** parameters, int pcnt, userrec* user)
1362         {
1363                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
1364                 {
1365                         if (Srv->MatchText(x->Name.c_str(),parameters[0]))
1366                         {
1367                                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: Connecting to server: %s (%s:%d)",user->nick,x->Name.c_str(),x->IPAddr.c_str(),x->Port);
1368                                 TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name);
1369                                 Srv->AddSocket(newsocket);
1370                                 return 1;
1371                         }
1372                 }
1373                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: No matching server could be found in the config file.",user->nick);
1374                 return 1;
1375         }
1376
1377         virtual int OnPreCommand(std::string command, char **parameters, int pcnt, userrec *user)
1378         {
1379                 if (command == "CONNECT")
1380                 {
1381                         return this->HandleConnect(parameters,pcnt,user);
1382                 }
1383                 else if (command == "SQUIT")
1384                 {
1385                         return this->HandleSquit(parameters,pcnt,user);
1386                 }
1387                 else if (command == "MAP")
1388                 {
1389                         this->HandleMap(parameters,pcnt,user);
1390                         return 1;
1391                 }
1392                 else if (command == "LUSERS")
1393                 {
1394                         this->HandleLusers(parameters,pcnt,user);
1395                         return 1;
1396                 }
1397                 else if (command == "LINKS")
1398                 {
1399                         this->HandleLinks(parameters,pcnt,user);
1400                         return 1;
1401                 }
1402                 return 0;
1403         }
1404
1405         virtual void OnGetServerDescription(std::string servername,std::string &description)
1406         {
1407                 TreeServer* s = FindServer(servername);
1408                 if (s)
1409                 {
1410                         description = s->GetDesc();
1411                 }
1412         }
1413
1414         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
1415         {
1416                 if (std::string(source->server) == Srv->GetServerName())
1417                 {
1418                         std::deque<std::string> params;
1419                         params.push_back(dest->nick);
1420                         params.push_back(channel->name);
1421                         DoOneToMany(source->nick,"INVITE",params);
1422                 }
1423         }
1424
1425         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, std::string topic)
1426         {
1427                 std::deque<std::string> params;
1428                 params.push_back(chan->name);
1429                 params.push_back(":"+topic);
1430                 DoOneToMany(user->nick,"TOPIC",params);
1431         }
1432
1433         virtual void OnUserNotice(userrec* user, void* dest, int target_type, std::string text)
1434         {
1435                 if (target_type == TYPE_USER)
1436                 {
1437                         userrec* d = (userrec*)dest;
1438                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
1439                         {
1440                                 std::deque<std::string> params;
1441                                 params.clear();
1442                                 params.push_back(d->nick);
1443                                 params.push_back(":"+text);
1444                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
1445                         }
1446                 }
1447                 else
1448                 {
1449                         if (std::string(user->server) == Srv->GetServerName())
1450                         {
1451                                 chanrec *c = (chanrec*)dest;
1452                                 std::deque<std::string> params;
1453                                 params.push_back(c->name);
1454                                 params.push_back(":"+text);
1455                                 DoOneToMany(user->nick,"NOTICE",params);
1456                         }
1457                 }
1458         }
1459
1460         virtual void OnUserMessage(userrec* user, void* dest, int target_type, std::string text)
1461         {
1462                 if (target_type == TYPE_USER)
1463                 {
1464                         // route private messages which are targetted at clients only to the server
1465                         // which needs to receive them
1466                         userrec* d = (userrec*)dest;
1467                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
1468                         {
1469                                 std::deque<std::string> params;
1470                                 params.clear();
1471                                 params.push_back(d->nick);
1472                                 params.push_back(":"+text);
1473                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
1474                         }
1475                 }
1476                 else
1477                 {
1478                         if (std::string(user->server) == Srv->GetServerName())
1479                         {
1480                                 chanrec *c = (chanrec*)dest;
1481                                 std::deque<std::string> params;
1482                                 params.push_back(c->name);
1483                                 params.push_back(":"+text);
1484                                 DoOneToMany(user->nick,"PRIVMSG",params);
1485                         }
1486                 }
1487         }
1488
1489         virtual void OnUserJoin(userrec* user, chanrec* channel)
1490         {
1491                 // Only do this for local users
1492                 if (std::string(user->server) == Srv->GetServerName())
1493                 {
1494                         log(DEBUG,"**** User on %s JOINS %s",user->server,channel->name);
1495                         std::deque<std::string> params;
1496                         params.clear();
1497                         params.push_back(channel->name);
1498                         if (*channel->key)
1499                         {
1500                                 log(DEBUG,"**** With key %s",channel->key);
1501                                 // if the channel has a key, force the join by emulating the key.
1502                                 params.push_back(channel->key);
1503                         }
1504                         DoOneToMany(user->nick,"JOIN",params);
1505                 }
1506         }
1507
1508         virtual void OnUserPart(userrec* user, chanrec* channel)
1509         {
1510                 if (std::string(user->server) == Srv->GetServerName())
1511                 {
1512                         log(DEBUG,"**** User on %s PARTS %s",user->server,channel->name);
1513                         std::deque<std::string> params;
1514                         params.clear();
1515                         params.push_back(channel->name);
1516                         DoOneToMany(user->nick,"PART",params);
1517                 }
1518         }
1519
1520         virtual void OnUserConnect(userrec* user)
1521         {
1522                 char agestr[MAXBUF];
1523                 if (std::string(user->server) == Srv->GetServerName())
1524                 {
1525                         log(DEBUG,"**** User on %s CONNECTS: %s",user->server,user->nick);
1526                         std::deque<std::string> params;
1527                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
1528                         params.clear();
1529                         params.push_back(agestr);
1530                         params.push_back(user->nick);
1531                         params.push_back(user->host);
1532                         params.push_back(user->dhost);
1533                         params.push_back(user->ident);
1534                         params.push_back("+"+std::string(user->modes));
1535                         params.push_back(user->ip);
1536                         params.push_back(":"+std::string(user->fullname));
1537                         DoOneToMany(Srv->GetServerName(),"NICK",params);
1538                 }
1539         }
1540
1541         virtual void OnUserQuit(userrec* user, std::string reason)
1542         {
1543                 if (std::string(user->server) == Srv->GetServerName())
1544                 {
1545                         log(DEBUG,"**** User on %s QUITS: %s",user->server,user->nick);
1546                         std::deque<std::string> params;
1547                         params.push_back(":"+reason);
1548                         DoOneToMany(user->nick,"QUIT",params);
1549                 }
1550         }
1551
1552         virtual void OnUserPostNick(userrec* user, std::string oldnick)
1553         {
1554                 if (std::string(user->server) == Srv->GetServerName())
1555                 {
1556                         log(DEBUG,"**** User on %s changes NICK: %s",user->server,user->nick);
1557                         std::deque<std::string> params;
1558                         params.push_back(user->nick);
1559                         DoOneToMany(oldnick,"NICK",params);
1560                 }
1561         }
1562
1563         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, std::string reason)
1564         {
1565                 if (std::string(source->server) == Srv->GetServerName())
1566                 {
1567                         log(DEBUG,"**** User on %s KICKs: %s %s",source->server,source->nick,user->nick);
1568                         std::deque<std::string> params;
1569                         params.push_back(chan->name);
1570                         params.push_back(user->nick);
1571                         params.push_back(":"+reason);
1572                         DoOneToMany(source->nick,"KICK",params);
1573                 }
1574         }
1575
1576         virtual void OnRemoteKill(userrec* source, userrec* dest, std::string reason)
1577         {
1578                 std::deque<std::string> params;
1579                 params.push_back(dest->nick);
1580                 params.push_back(":"+reason);
1581                 DoOneToMany(source->nick,"KILL",params);
1582         }
1583
1584         virtual void OnRehash(std::string parameter)
1585         {
1586                 if (parameter != "")
1587                 {
1588                         std::deque<std::string> params;
1589                         params.push_back(parameter);
1590                         DoOneToMany(Srv->GetServerName(),"REHASH",params);
1591                         // check for self
1592                         if (Srv->MatchText(Srv->GetServerName(),parameter))
1593                         {
1594                                 Srv->SendOpers("*** Remote rehash initiated from server \002"+Srv->GetServerName()+"\002.");
1595                                 Srv->RehashServer();
1596                         }
1597                 }
1598         }
1599
1600         // note: the protocol does not allow direct umode +o except
1601         // via NICK with 8 params. sending OPERTYPE infers +o modechange
1602         // locally.
1603         virtual void OnOper(userrec* user, std::string opertype)
1604         {
1605                 if (std::string(user->server) == Srv->GetServerName())
1606                 {
1607                         std::deque<std::string> params;
1608                         params.push_back(opertype);
1609                         DoOneToMany(user->nick,"OPERTYPE",params);
1610                 }
1611         }
1612
1613         virtual void OnMode(userrec* user, void* dest, int target_type, std::string text)
1614         {
1615                 log(DEBUG,"*** ONMODE TRIGGER");
1616                 if (std::string(user->server) == Srv->GetServerName())
1617                 {
1618                         log(DEBUG,"*** LOCAL");
1619                         if (target_type == TYPE_USER)
1620                         {
1621                                 userrec* u = (userrec*)dest;
1622                                 std::deque<std::string> params;
1623                                 params.push_back(u->nick);
1624                                 params.push_back(text);
1625                                 DoOneToMany(user->nick,"MODE",params);
1626                         }
1627                         else
1628                         {
1629                                 chanrec* c = (chanrec*)dest;
1630                                 std::deque<std::string> params;
1631                                 params.push_back(c->name);
1632                                 params.push_back(text);
1633                                 DoOneToMany(user->nick,"MODE",params);
1634                         }
1635                 }
1636         }
1637
1638         virtual void ProtoSendMode(void* opaque, int target_type, void* target, std::string modeline);
1639         {
1640                 TreeSocket* s = (TreeSocket*)opaque;
1641                 if (target)
1642                 {
1643                         if (target_type == TYPE_USER)
1644                         {
1645                                 userrec* u = (userrec*)target;
1646                                 opaque->WriteLine(":"+opaque->GetName()+" FMODE "+u->nick+" "+modeline);
1647                         }
1648                         else (target_type == TYPE_CHANNEL)
1649                         {
1650                                 chanrec* c = (chanrec*)target;
1651                                 opaque->WriteLine(":"+opaque->GetName()+" FMODE "+c->name+" "+modeline);
1652                         }
1653                 }
1654         }
1655
1656         virtual ~ModuleSpanningTree()
1657         {
1658                 delete Srv;
1659         }
1660
1661         virtual Version GetVersion()
1662         {
1663                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
1664         }
1665 };
1666
1667
1668 class ModuleSpanningTreeFactory : public ModuleFactory
1669 {
1670  public:
1671         ModuleSpanningTreeFactory()
1672         {
1673         }
1674
1675         ~ModuleSpanningTreeFactory()
1676         {
1677         }
1678
1679         virtual Module * CreateModule()
1680         {
1681                 return new ModuleSpanningTree;
1682         }
1683
1684 };
1685
1686
1687 extern "C" void * init_module( void )
1688 {
1689         TreeProtocolModule = new ModuleSpanningTreeFactory;
1690         return TreeProtocolModule;
1691 }
1692