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 extern std::vector<Module*> modules;
  48 extern std::vector<ircd_module*> factory;
  49 extern int MODCOUNT;
  50
  51 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  52
  53 typedef nspace::hash_map<std::string, userrec*, nspace::hash<string>, irc::StrHashComp> user_hash;
  54 typedef nspace::hash_map<std::string, chanrec*, nspace::hash<string>, irc::StrHashComp> chan_hash;
  55
  56 extern user_hash clientlist;
  57 extern chan_hash chanlist;
  58
  59 class TreeServer;
  60 class TreeSocket;
  61
  62 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> params, std::string target);
  63 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> params, std::string omit);
  64 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> params);
  65 bool DoOneToAllButSenderRaw(std::string data,std::string omit);
  66
  67 class TreeServer
  68 {
  69         TreeServer* Parent;
  70         std::vector<TreeServer*> Children;
  71         std::string ServerName;
  72         std::string ServerDesc;
  73         std::string VersionString;
  74         int UserCount;
  75         int OperCount;
  76         TreeSocket* Socket;     // for directly connected servers this points at the socket object
  77
  78  public:
  79
  80         TreeServer()
  81         {
  82                 Parent = NULL;
  83                 ServerName = "";
  84                 ServerDesc = "";
  85                 VersionString = "";
  86                 UserCount = OperCount = 0;
  87         }
  88
  89         TreeServer(std::string Name, std::string Desc) : ServerName(Name), ServerDesc(Desc)
  90         {
  91                 Parent = NULL;
  92                 VersionString = "";
  93                 UserCount = OperCount = 0;
  94         }
  95
  96         TreeServer(std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock) : Parent(Above), ServerName(Name), ServerDesc(Desc), Socket(Sock)
  97         {
  98                 VersionString = "";
  99                 UserCount = OperCount = 0;
 100         }
 101
 102         std::string GetName()
 103         {
 104                 return this->ServerName;
 105         }
 106
 107         std::string GetDesc()
 108         {
 109                 return this->ServerDesc;
 110         }
 111
 112         std::string GetVersion()
 113         {
 114                 return this->VersionString;
 115         }
 116
 117         int GetUserCount()
 118         {
 119                 return this->UserCount;
 120         }
 121
 122         int GetOperCount()
 123         {
 124                 return this->OperCount;
 125         }
 126
 127         TreeSocket* GetSocket()
 128         {
 129                 return this->Socket;
 130         }
 131
 132         TreeServer* GetParent()
 133         {
 134                 return this->Parent;
 135         }
 136
 137         unsigned int ChildCount()
 138         {
 139                 return Children.size();
 140         }
 141
 142         TreeServer* GetChild(unsigned int n)
 143         {
 144                 if (n < Children.size())
 145                 {
 146                         return Children[n];
 147                 }
 148                 else
 149                 {
 150                         return NULL;
 151                 }
 152         }
 153
 154         void AddChild(TreeServer* Child)
 155         {
 156                 Children.push_back(Child);
 157         }
 158
 159         bool DelChild(TreeServer* Child)
 160         {
 161                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 162                 {
 163                         if (*a == Child)
 164                         {
 165                                 Children.erase(a);
 166                                 return true;
 167                         }
 168                 }
 169                 return false;
 170         }
 171
 172         // removes child nodes of this node, and of that node, etc etc
 173         bool Tidy()
 174         {
 175                 bool stillchildren = true;
 176                 while (stillchildren)
 177                 {
 178                         stillchildren = false;
 179                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 180                         {
 181                                 TreeServer* s = (TreeServer*)*a;
 182                                 s->Tidy();
 183                                 Children.erase(a);
 184                                 delete s;
 185                                 stillchildren = true;
 186                                 break;
 187                         }
 188                 }
 189                 return true;
 190         }
 191 };
 192
 193 class Link
 194 {
 195  public:
 196          std::string Name;
 197          std::string IPAddr;
 198          int Port;
 199          std::string SendPass;
 200          std::string RecvPass;
 201 };
 202
 203 /* $ModDesc: Povides a spanning tree server link protocol */
 204
 205 Server *Srv;
 206 ConfigReader *Conf;
 207 TreeServer *TreeRoot;
 208 std::vector<Link> LinkBlocks;
 209
 210 TreeServer* RouteEnumerate(TreeServer* Current, std::string ServerName)
 211 {
 212         if (Current->GetName() == ServerName)
 213                 return Current;
 214         for (unsigned int q = 0; q < Current->ChildCount(); q++)
 215         {
 216                 TreeServer* found = RouteEnumerate(Current->GetChild(q),ServerName);
 217                 if (found)
 218                 {
 219                         return found;
 220                 }
 221         }
 222         return NULL;
 223 }
 224
 225 // Returns the locally connected server we must route a
 226 // message through to reach server 'ServerName'. This
 227 // only applies to one-to-one and not one-to-many routing.
 228 TreeServer* BestRouteTo(std::string ServerName)
 229 {
 230         log(DEBUG,"Finding best route to %s",ServerName.c_str());
 231         if (ServerName.c_str() == TreeRoot->GetName())
 232         {
 233                 log(DEBUG,"Cant route to myself!!!");
 234                 return NULL;
 235         }
 236         // first, find the server by recursively walking the tree
 237         TreeServer* Found = RouteEnumerate(TreeRoot,ServerName);
 238         // did we find it? If not, they did something wrong, abort.
 239         if (!Found)
 240         {
 241                 log(DEBUG,"Failed to find %s by walking tree!",ServerName.c_str());
 242                 return NULL;
 243         }
 244         else
 245         {
 246                 // The server exists, follow its parent nodes until
 247                 // the parent of the current is 'TreeRoot', we know
 248                 // then that this is a directly-connected server.
 249                 while ((Found) && (Found->GetParent() != TreeRoot))
 250                 {
 251                         Found = Found->GetParent();
 252                 }
 253                 log(DEBUG,"Route to %s is via %s",ServerName.c_str(),Found->GetName().c_str());
 254                 return Found;
 255         }
 256 }
 257
 258 bool LookForServer(TreeServer* Current, std::string ServerName)
 259 {
 260         if (ServerName == Current->GetName())
 261                 return true;
 262         for (unsigned int q = 0; q < Current->ChildCount(); q++)
 263         {
 264                 if (LookForServer(Current->GetChild(q),ServerName))
 265                         return true;
 266         }
 267         return false;
 268 }
 269
 270 TreeServer* Found;
 271
 272 void RFindServer(TreeServer* Current, std::string ServerName)
 273 {
 274         if ((ServerName == Current->GetName()) && (!Found))
 275         {
 276                 Found = Current;
 277                 log(DEBUG,"Found server %s desc %s",Current->GetName().c_str(),Current->GetDesc().c_str());
 278                 return;
 279         }
 280         if (!Found)
 281         {
 282                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 283                 {
 284                         if (!Found)
 285                                 RFindServer(Current->GetChild(q),ServerName);
 286                 }
 287         }
 288         return;
 289 }
 290
 291 TreeServer* FindServer(std::string ServerName)
 292 {
 293         Found = NULL;
 294         RFindServer(TreeRoot,ServerName);
 295         return Found;
 296 }
 297
 298 bool IsServer(std::string ServerName)
 299 {
 300         return LookForServer(TreeRoot,ServerName);
 301 }
 302
 303 class TreeSocket : public InspSocket
 304 {
 305         std::string myhost;
 306         std::string in_buffer;
 307         ServerState LinkState;
 308         std::string InboundServerName;
 309         std::string InboundDescription;
 310         int num_lost_users;
 311         int num_lost_servers;
 312
 313  public:
 314
 315         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime)
 316                 : InspSocket(host, port, listening, maxtime)
 317         {
 318                 Srv->Log(DEBUG,"Create new listening");
 319                 myhost = host;
 320                 this->LinkState = LISTENER;
 321         }
 322
 323         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 324                 : InspSocket(host, port, listening, maxtime)
 325         {
 326                 Srv->Log(DEBUG,"Create new outbound");
 327                 myhost = ServerName;
 328                 this->LinkState = CONNECTING;
 329         }
 330
 331         TreeSocket(int newfd, char* ip)
 332                 : InspSocket(newfd, ip)
 333         {
 334                 Srv->Log(DEBUG,"Associate new inbound");
 335                 this->LinkState = WAIT_AUTH_1;
 336         }
 337
 338         virtual bool OnConnected()
 339         {
 340                 if (this->LinkState == CONNECTING)
 341                 {
 342                         Srv->SendOpers("*** Connection to "+myhost+"["+this->GetIP()+"] established.");
 343                         // we should send our details here.
 344                         // if the other side is satisfied, they send theirs.
 345                         // we do not need to change state here.
 346                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 347                         {
 348                                 if (x->Name == this->myhost)
 349                                 {
 350                                         // found who we're supposed to be connecting to, send the neccessary gubbins.
 351                                         this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 352                                         return true;
 353                                 }
 354                         }
 355                 }
 356                 log(DEBUG,"Outbound connection ERROR: Could not find the right link block!");
 357                 return true;
 358         }
 359
 360         virtual void OnError(InspSocketError e)
 361         {
 362         }
 363
 364         virtual int OnDisconnect()
 365         {
 366                 return true;
 367         }
 368
 369         // recursively send the server tree with distances as hops
 370         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 371         {
 372                 char command[1024];
 373                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 374                 {
 375                         TreeServer* recursive_server = Current->GetChild(q);
 376                         if (recursive_server != s)
 377                         {
 378                                 // :source.server SERVER server.name hops :Description
 379                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 380                                 this->WriteLine(command);
 381                                 // down to next level
 382                                 this->SendServers(recursive_server, s, hops+1);
 383                         }
 384                 }
 385         }
 386
 387         void SquitServer(TreeServer* Current)
 388         {
 389                 // recursively squit the servers attached to 'Current'
 390                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 391                 {
 392                         TreeServer* recursive_server = Current->GetChild(q);
 393                         this->SquitServer(recursive_server);
 394                 }
 395                 // Now we've whacked the kids, whack self
 396                 log(DEBUG,"Deleted %s",Current->GetName().c_str());
 397                 num_lost_servers++;
 398                 bool quittingpeople = true;
 399                 while (quittingpeople)
 400                 {
 401                         quittingpeople = false;
 402                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 403                         {
 404                                 if (!strcasecmp(u->second->server,Current->GetName().c_str()))
 405                                 {
 406                                         log(DEBUG,"Quitting user %s of server %s",u->second->nick,u->second->server);
 407                                         Srv->QuitUser(u->second,Current->GetName()+" "+std::string(Srv->GetServerName()));
 408                                         num_lost_users++;
 409                                         quittingpeople = true;
 410                                         break;
 411                                 }
 412                         }
 413                 }
 414         }
 415
 416         void Squit(TreeServer* Current,std::string reason)
 417         {
 418                 if (Current)
 419                 {
 420                         std::deque<std::string> params;
 421                         params.push_back(Current->GetName());
 422                         params.push_back(":"+reason);
 423                         DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
 424                         if (Current->GetParent() == TreeRoot)
 425                         {
 426                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
 427                         }
 428                         else
 429                         {
 430                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
 431                         }
 432                         num_lost_servers = 0;
 433                         num_lost_users = 0;
 434                         SquitServer(Current);
 435                         Current->Tidy();
 436                         Current->GetParent()->DelChild(Current);
 437                         delete Current;
 438                         WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
 439                 }
 440                 else
 441                 {
 442                         log(DEBUG,"Squit from unknown server");
 443                 }
 444         }
 445
 446         bool ForceMode(std::string source, std::deque<std::string> params)
 447         {
 448                 userrec* who = new userrec;
 449                 who->fd = FD_MAGIC_NUMBER;
 450                 if (params.size() < 2)
 451                         return true;
 452                 char* modelist[255];
 453                 for (unsigned int q = 0; q < params.size(); q++)
 454                 {
 455                         modelist[q] = (char*)params[q].c_str();
 456                 }
 457                 Srv->SendMode(modelist,params.size(),who);
 458                 DoOneToAllButSender(source,"FMODE",params,source);
 459                 delete who;
 460                 return true;
 461         }
 462
 463         bool ForceTopic(std::string source, std::deque<std::string> params)
 464         {
 465                 // FTOPIC %s %lu %s :%s
 466                 if (params.size() != 4)
 467                         return true;
 468                 std::string channel = params[0];
 469                 time_t ts = atoi(params[1].c_str());
 470                 std::string setby = params[2];
 471                 std::string topic = params[3];
 472
 473                 chanrec* c = Srv->FindChannel(channel);
 474                 if (c)
 475                 {
 476                         if ((ts >= c->topicset) || (!*c->topic))
 477                         {
 478                                 strlcpy(c->topic,topic.c_str(),MAXTOPIC);
 479                                 strlcpy(c->setby,setby.c_str(),NICKMAX);
 480                                 c->topicset = ts;
 481                                 WriteChannelWithServ((char*)source.c_str(), c, "TOPIC %s :%s", c->name, c->topic);
 482                         }
 483
 484                 }
 485
 486                 // all done, send it on its way
 487                 params[3] = ":" + params[3];
 488                 DoOneToAllButSender(source,"FTOPIC",params,source);
 489
 490                 return true;
 491         }
 492
 493         bool ForceJoin(std::string source, std::deque<std::string> params)
 494         {
 495                 if (params.size() < 1)
 496                         return true;
 497                 for (unsigned int channelnum = 0; channelnum < params.size(); channelnum++)
 498                 {
 499                         // process one channel at a time, applying modes.
 500                         char* channel = (char*)params[channelnum].c_str();
 501                         char permissions = *channel;
 502                         char* mode = NULL;
 503                         switch (permissions)
 504                         {
 505                                 case '@':
 506                                         channel++;
 507                                         mode = "+o";
 508                                 break;
 509                                 case '%':
 510                                         channel++;
 511                                         mode = "+h";
 512                                 break;
 513                                 case '+':
 514                                         channel++;
 515                                         mode = "+v";
 516                                 break;
 517                         }
 518                         userrec* who = Srv->FindNick(source);
 519                         if (who)
 520                         {
 521                                 char* key = "";
 522                                 chanrec* chan = Srv->FindChannel(channel);
 523                                 if ((chan) && (*chan->key))
 524                                 {
 525                                         key = chan->key;
 526                                 }
 527                                 Srv->JoinUserToChannel(who,channel,key);
 528                                 if (mode)
 529                                 {
 530                                         char* modelist[3];
 531                                         modelist[0] = channel;
 532                                         modelist[1] = mode;
 533                                         modelist[2] = who->nick;
 534                                         Srv->SendMode(modelist,3,who);
 535                                 }
 536                                 DoOneToAllButSender(source,"FJOIN",params,who->server);
 537                         }
 538                 }
 539                 return true;
 540         }
 541
 542         bool IntroduceClient(std::string source, std::deque<std::string> params)
 543         {
 544                 if (params.size() < 8)
 545                         return true;
 546                 // NICK age nick host dhost ident +modes ip :gecos
 547                 //       0   1    2    3      4     5    6   7
 548                 std::string nick = params[1];
 549                 std::string host = params[2];
 550                 std::string dhost = params[3];
 551                 std::string ident = params[4];
 552                 time_t age = atoi(params[0].c_str());
 553                 std::string modes = params[5];
 554                 if (*(modes.c_str()) == '+')
 555                 {
 556                         char* m = (char*)modes.c_str();
 557                         m++;
 558                         modes = m;
 559                 }
 560                 std::string ip = params[6];
 561                 std::string gecos = params[7];
 562                 char* tempnick = (char*)nick.c_str();
 563                 log(DEBUG,"Introduce client %s!%s@%s",tempnick,ident.c_str(),host.c_str());
 564
 565                 user_hash::iterator iter;
 566                 iter = clientlist.find(tempnick);
 567                 if (iter != clientlist.end())
 568                 {
 569                         // nick collision
 570                         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);
 571                         this->WriteLine(":"+Srv->GetServerName()+" KILL "+tempnick+" :Nickname collision");
 572                         return true;
 573                 }
 574
 575                 clientlist[tempnick] = new userrec();
 576                 clientlist[tempnick]->fd = FD_MAGIC_NUMBER;
 577                 strlcpy(clientlist[tempnick]->nick, tempnick,NICKMAX);
 578                 strlcpy(clientlist[tempnick]->host, host.c_str(),160);
 579                 strlcpy(clientlist[tempnick]->dhost, dhost.c_str(),160);
 580                 clientlist[tempnick]->server = (char*)FindServerNamePtr(source.c_str());
 581                 strlcpy(clientlist[tempnick]->ident, ident.c_str(),IDENTMAX);
 582                 strlcpy(clientlist[tempnick]->fullname, gecos.c_str(),MAXGECOS);
 583                 clientlist[tempnick]->registered = 7;
 584                 clientlist[tempnick]->signon = age;
 585                 strlcpy(clientlist[tempnick]->ip,ip.c_str(),16);
 586                 for (int i = 0; i < MAXCHANS; i++)
 587                 {
 588                         clientlist[tempnick]->chans[i].channel = NULL;
 589                         clientlist[tempnick]->chans[i].uc_modes = 0;
 590                 }
 591                 params[7] = ":" + params[7];
 592                 DoOneToAllButSender(source,"NICK",params,source);
 593                 return true;
 594         }
 595
 596         void SendChannelModes(TreeServer* Current)
 597         {
 598                 char data[MAXBUF];
 599                 for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 600                 {
 601                         snprintf(data,MAXBUF,":%s FMODE %s +%s",Srv->GetServerName().c_str(),c->second->name,chanmodes(c->second));
 602                         this->WriteLine(data);
 603                         if (*c->second->topic)
 604                         {
 605                                 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);
 606                                 this->WriteLine(data);
 607                         }
 608                         for (BanList::iterator b = c->second->bans.begin(); b != c->second->bans.end(); b++)
 609                         {
 610                                 snprintf(data,MAXBUF,":%s FMODE %s +b %s",Srv->GetServerName().c_str(),c->second->name,b->data);
 611                                 this->WriteLine(data);
 612                         }
 613                         FOREACH_MOD OnSyncChannel(c->second,TreeProtocolModule,this);
 614                 }
 615         }
 616
 617         // send all users and their channels
 618         void SendUsers(TreeServer* Current)
 619         {
 620                 char data[MAXBUF];
 621                 for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 622                 {
 623                         if (u->second->registered == 7)
 624                         {
 625                                 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);
 626                                 this->WriteLine(data);
 627                                 if (strchr(u->second->modes,'o'))
 628                                 {
 629                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
 630                                 }
 631                                 char* chl = chlist(u->second,u->second);
 632                                 if (*chl)
 633                                 {
 634                                         this->WriteLine(":"+std::string(u->second->nick)+" FJOIN "+std::string(chl));
 635                                 }
 636                                 FOREACH_MOD OnSyncUser(u->second,TreeProtocolModule,this);
 637                         }
 638                 }
 639         }
 640
 641         void DoBurst(TreeServer* s)
 642         {
 643                 log(DEBUG,"Beginning network burst");
 644                 Srv->SendOpers("*** Bursting to "+s->GetName()+".");
 645                 this->WriteLine("BURST");
 646                 // Send server tree
 647                 this->SendServers(TreeRoot,s,1);
 648                 // Send users and their channels
 649                 this->SendUsers(s);
 650                 // TODO: Send everything else (channel modes etc)
 651                 this->SendChannelModes(s);
 652                 this->WriteLine("ENDBURST");
 653         }
 654
 655         virtual bool OnDataReady()
 656         {
 657                 char* data = this->Read();
 658                 if (data)
 659                 {
 660                         this->in_buffer += data;
 661                         while (in_buffer.find("\n") != std::string::npos)
 662                         {
 663                                 char* line = (char*)in_buffer.c_str();
 664                                 std::string ret = "";
 665                                 while ((*line != '\n') && (strlen(line)))
 666                                 {
 667                                         ret = ret + *line;
 668                                         line++;
 669                                 }
 670                                 if ((*line == '\n') || (*line == '\r'))
 671                                         line++;
 672                                 in_buffer = line;
 673                                 if (!this->ProcessLine(ret))
 674                                 {
 675                                         return false;
 676                                 }
 677                         }
 678                 }
 679                 return (data != NULL);
 680         }
 681
 682         int WriteLine(std::string line)
 683         {
 684                 return this->Write(line + "\r\n");
 685         }
 686
 687         bool Error(std::deque<std::string> params)
 688         {
 689                 if (params.size() < 1)
 690                         return false;
 691                 std::string Errmsg = params[0];
 692                 std::string SName = myhost;
 693                 if (InboundServerName != "")
 694                 {
 695                         SName = InboundServerName;
 696                 }
 697                 Srv->SendOpers("*** ERROR from "+SName+": "+Errmsg);
 698                 // we will return false to cause the socket to close.
 699                 return false;
 700         }
 701
 702         bool OperType(std::string prefix, std::deque<std::string> params)
 703         {
 704                 if (params.size() != 1)
 705                         return true;
 706                 std::string opertype = params[0];
 707                 userrec* u = Srv->FindNick(prefix);
 708                 if (u)
 709                 {
 710                         strlcpy(u->oper,opertype.c_str(),NICKMAX);
 711                         if (!strchr(u->modes,'o'))
 712                         {
 713                                 strcat(u->modes,"o");
 714                         }
 715                         DoOneToAllButSender(u->server,"OPERTYPE",params,u->server);
 716                 }
 717                 return true;
 718         }
 719
 720         bool RemoteRehash(std::string prefix, std::deque<std::string> params)
 721         {
 722                 if (params.size() < 1)
 723                         return true;
 724                 std::string servermask = params[0];
 725                 if (Srv->MatchText(Srv->GetServerName(),servermask))
 726                 {
 727                         Srv->SendOpers("*** Remote rehash initiated from server \002"+prefix+"\002.");
 728                         Srv->RehashServer();
 729                 }
 730                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
 731                 return true;
 732         }
 733
 734         bool RemoteKill(std::string prefix, std::deque<std::string> params)
 735         {
 736                 if (params.size() != 2)
 737                         return true;
 738                 std::string nick = params[0];
 739                 std::string reason = params[1];
 740                 userrec* u = Srv->FindNick(prefix);
 741                 userrec* who = Srv->FindNick(nick);
 742                 if (who)
 743                 {
 744                         std::string sourceserv = prefix;
 745                         if (u)
 746                         {
 747                                 sourceserv = u->server;
 748                         }
 749                         params[1] = ":" + params[1];
 750                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
 751                         Srv->QuitUser(who,reason);
 752                 }
 753                 return true;
 754         }
 755
 756         bool RemoteServer(std::string prefix, std::deque<std::string> params)
 757         {
 758                 if (params.size() < 4)
 759                         return false;
 760                 std::string servername = params[0];
 761                 std::string password = params[1];
 762                 // hopcount is not used for a remote server, we calculate this ourselves
 763                 std::string description = params[3];
 764                 TreeServer* ParentOfThis = FindServer(prefix);
 765                 if (!ParentOfThis)
 766                 {
 767                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
 768                         return false;
 769                 }
 770                 TreeServer* Node = new TreeServer(servername,description,ParentOfThis,NULL);
 771                 ParentOfThis->AddChild(Node);
 772                 params[3] = ":" + params[3];
 773                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
 774                 Srv->SendOpers("*** Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
 775                 return true;
 776         }
 777
 778         bool Outbound_Reply_Server(std::deque<std::string> params)
 779         {
 780                 if (params.size() < 4)
 781                         return false;
 782                 std::string servername = params[0];
 783                 std::string password = params[1];
 784                 int hops = atoi(params[2].c_str());
 785                 if (hops)
 786                 {
 787                         this->WriteLine("ERROR :Server too far away for authentication");
 788                         return false;
 789                 }
 790                 std::string description = params[3];
 791                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 792                 {
 793                         if ((x->Name == servername) && (x->RecvPass == password))
 794                         {
 795                                 // Begin the sync here. this kickstarts the
 796                                 // other side, waiting in WAIT_AUTH_2 state,
 797                                 // into starting their burst, as it shows
 798                                 // that we're happy.
 799                                 this->LinkState = CONNECTED;
 800                                 // we should add the details of this server now
 801                                 // to the servers tree, as a child of the root
 802                                 // node.
 803                                 TreeServer* Node = new TreeServer(servername,description,TreeRoot,this);
 804                                 TreeRoot->AddChild(Node);
 805                                 params[3] = ":" + params[3];
 806                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,servername);
 807                                 this->DoBurst(Node);
 808                                 return true;
 809                         }
 810                 }
 811                 this->WriteLine("ERROR :Invalid credentials");
 812                 return false;
 813         }
 814
 815         bool Inbound_Server(std::deque<std::string> params)
 816         {
 817                 if (params.size() < 4)
 818                         return false;
 819                 std::string servername = params[0];
 820                 std::string password = params[1];
 821                 int hops = atoi(params[2].c_str());
 822                 if (hops)
 823                 {
 824                         this->WriteLine("ERROR :Server too far away for authentication");
 825                         return false;
 826                 }
 827                 std::string description = params[3];
 828                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 829                 {
 830                         if ((x->Name == servername) && (x->RecvPass == password))
 831                         {
 832                                 Srv->SendOpers("*** Verified incoming server connection from \002"+servername+"\002["+this->GetIP()+"] ("+description+")");
 833                                 this->InboundServerName = servername;
 834                                 this->InboundDescription = description;
 835                                 // this is good. Send our details: Our server name and description and hopcount of 0,
 836                                 // along with the sendpass from this block.
 837                                 this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 838                                 // move to the next state, we are now waiting for THEM.
 839                                 this->LinkState = WAIT_AUTH_2;
 840                                 return true;
 841                         }
 842                 }
 843                 this->WriteLine("ERROR :Invalid credentials");
 844                 return false;
 845         }
 846
 847         std::deque<std::string> Split(std::string line, bool stripcolon)
 848         {
 849                 std::deque<std::string> n;
 850                 std::stringstream s(line);
 851                 std::string param = "";
 852                 n.clear();
 853                 int item = 0;
 854                 while (!s.eof())
 855                 {
 856                         s >> param;
 857                         if ((param != "") && (param != "\n"))
 858                         {
 859                                 if ((param.c_str()[0] == ':') && (item))
 860                                 {
 861                                         char* str = (char*)param.c_str();
 862                                         str++;
 863                                         param = str;
 864                                         std::string append;
 865                                         while (!s.eof())
 866                                         {
 867                                                 append = "";
 868                                                 s >> append;
 869                                                 if (append != "")
 870                                                 {
 871                                                         param = param + " " + append;
 872                                                 }
 873                                         }
 874                                 }
 875                                 item++;
 876                                 n.push_back(param);
 877                         }
 878                 }
 879                 return n;
 880         }
 881
 882         bool ProcessLine(std::string line)
 883         {
 884                 char* l = (char*)line.c_str();
 885                 while ((strlen(l)) && (l[strlen(l)-1] == '\r') || (l[strlen(l)-1] == '\n'))
 886                         l[strlen(l)-1] = '\0';
 887                 line = l;
 888                 if (line == "")
 889                         return true;
 890                 Srv->Log(DEBUG,"inbound-line: '"+line+"'");
 891                 std::deque<std::string> params = this->Split(line,true);
 892                 std::string command = "";
 893                 std::string prefix = "";
 894                 if (((params[0].c_str())[0] == ':') && (params.size() > 1))
 895                 {
 896                         prefix = params[0];
 897                         command = params[1];
 898                         char* pref = (char*)prefix.c_str();
 899                         prefix = ++pref;
 900                         params.pop_front();
 901                         params.pop_front();
 902                 }
 903                 else
 904                 {
 905                         prefix = "";
 906                         command = params[0];
 907                         params.pop_front();
 908                 }
 909
 910                 switch (this->LinkState)
 911                 {
 912                         TreeServer* Node;
 913
 914                         case WAIT_AUTH_1:
 915                                 // Waiting for SERVER command from remote server. Server initiating
 916                                 // the connection sends the first SERVER command, listening server
 917                                 // replies with theirs if its happy, then if the initiator is happy,
 918                                 // it starts to send its net sync, which starts the merge, otherwise
 919                                 // it sends an ERROR.
 920                                 if (command == "SERVER")
 921                                 {
 922                                         return this->Inbound_Server(params);
 923                                 }
 924                                 else if (command == "ERROR")
 925                                 {
 926                                         return this->Error(params);
 927                                 }
 928                         break;
 929                         case WAIT_AUTH_2:
 930                                 // Waiting for start of other side's netmerge to say they liked our
 931                                 // password.
 932                                 if (command == "SERVER")
 933                                 {
 934                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
 935                                         // silently ignore.
 936                                         return true;
 937                                 }
 938                                 else if (command == "BURST")
 939                                 {
 940                                         this->LinkState = CONNECTED;
 941                                         Node = new TreeServer(InboundServerName,InboundDescription,TreeRoot,this);
 942                                         TreeRoot->AddChild(Node);
 943                                         params.clear();
 944                                         params.push_back(InboundServerName);
 945                                         params.push_back("*");
 946                                         params.push_back("1");
 947                                         params.push_back(":"+InboundDescription);
 948                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
 949                                         this->DoBurst(Node);
 950                                 }
 951                                 else if (command == "ERROR")
 952                                 {
 953                                         return this->Error(params);
 954                                 }
 955
 956                         break;
 957                         case LISTENER:
 958                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
 959                                 return false;
 960                         break;
 961                         case CONNECTING:
 962                                 if (command == "SERVER")
 963                                 {
 964                                         // another server we connected to, which was in WAIT_AUTH_1 state,
 965                                         // has just sent us their credentials. If we get this far, theyre
 966                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
 967                                         // if we're happy with this, we should send our netburst which
 968                                         // kickstarts the merge.
 969                                         return this->Outbound_Reply_Server(params);
 970                                 }
 971                         break;
 972                         case CONNECTED:
 973                                 // This is the 'authenticated' state, when all passwords
 974                                 // have been exchanged and anything past this point is taken
 975                                 // as gospel.
 976                                 std::string target = "";
 977                                 if ((command == "NICK") && (params.size() > 1))
 978                                 {
 979                                         return this->IntroduceClient(prefix,params);
 980                                 }
 981                                 else if (command == "FJOIN")
 982                                 {
 983                                         return this->ForceJoin(prefix,params);
 984                                 }
 985                                 else if (command == "SERVER")
 986                                 {
 987                                         return this->RemoteServer(prefix,params);
 988                                 }
 989                                 else if (command == "OPERTYPE")
 990                                 {
 991                                         return this->OperType(prefix,params);
 992                                 }
 993                                 else if (command == "FMODE")
 994                                 {
 995                                         return this->ForceMode(prefix,params);
 996                                 }
 997                                 else if (command == "KILL")
 998                                 {
 999                                         return this->RemoteKill(prefix,params);
1000                                 }
1001                                 else if (command == "FTOPIC")
1002                                 {
1003                                         return this->ForceTopic(prefix,params);
1004                                 }
1005                                 else if (command == "REHASH")
1006                                 {
1007                                         return this->RemoteRehash(prefix,params);
1008                                 }
1009                                 else if (command == "SQUIT")
1010                                 {
1011                                         if (params.size() == 2)
1012                                         {
1013                                                 this->Squit(FindServer(params[0]),params[1]);
1014                                         }
1015                                         return true;
1016                                 }
1017                                 else
1018                                 {
1019                                         // not a special inter-server command.
1020                                         // Emulate the actual user doing the command,
1021                                         // this saves us having a huge ugly parser.
1022                                         userrec* who = Srv->FindNick(prefix);
1023                                         std::string sourceserv = this->myhost;
1024                                         if (this->InboundServerName != "")
1025                                         {
1026                                                 sourceserv = this->InboundServerName;
1027                                         }
1028                                         if (who)
1029                                         {
1030                                                 // its a user
1031                                                 target = who->server;
1032                                                 char* strparams[127];
1033                                                 for (unsigned int q = 0; q < params.size(); q++)
1034                                                 {
1035                                                         strparams[q] = (char*)params[q].c_str();
1036                                                 }
1037                                                 log(DEBUG,"*** CALL COMMAND HANDLER FOR %s, SOURCE: '%s'",command.c_str(),who->nick);
1038                                                 Srv->CallCommandHandler(command, strparams, params.size(), who);
1039                                         }
1040                                         else
1041                                         {
1042                                                 // its not a user. Its either a server, or somethings screwed up.
1043                                                 if (IsServer(prefix))
1044                                                 {
1045                                                         target = Srv->GetServerName();
1046                                                 }
1047                                                 else
1048                                                 {
1049                                                         log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
1050                                                         return true;
1051                                                 }
1052                                         }
1053                                         return DoOneToAllButSenderRaw(line,sourceserv);
1054
1055                                 }
1056                                 return true;
1057                         break;
1058                 }
1059                 return true;
1060         }
1061
1062         virtual std::string GetName()
1063         {
1064                 std::string sourceserv = this->myhost;
1065                 if (this->InboundServerName != "")
1066                 {
1067                         sourceserv = this->InboundServerName;
1068                 }
1069                 return sourceserv;
1070         }
1071
1072         virtual void OnTimeout()
1073         {
1074                 if (this->LinkState == CONNECTING)
1075                 {
1076                         Srv->SendOpers("*** CONNECT: Connection to \002"+myhost+"\002 timed out.");
1077                 }
1078         }
1079
1080         virtual void OnClose()
1081         {
1082                 // Connection closed.
1083                 // If the connection is fully up (state CONNECTED)
1084                 // then propogate a netsplit to all peers.
1085                 std::string quitserver = this->myhost;
1086                 if (this->InboundServerName != "")
1087                 {
1088                         quitserver = this->InboundServerName;
1089                 }
1090                 TreeServer* s = FindServer(quitserver);
1091                 if (s)
1092                 {
1093                         Squit(s,"Remote host closed the connection");
1094                 }
1095         }
1096
1097         virtual int OnIncomingConnection(int newsock, char* ip)
1098         {
1099                 TreeSocket* s = new TreeSocket(newsock, ip);
1100                 Srv->AddSocket(s);
1101                 return true;
1102         }
1103 };
1104
1105 bool DoOneToAllButSenderRaw(std::string data,std::string omit)
1106 {
1107         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1108         {
1109                 TreeServer* Route = TreeRoot->GetChild(x);
1110                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (BestRouteTo(omit) != Route))
1111                 {
1112                         TreeSocket* Sock = Route->GetSocket();
1113                         log(DEBUG,"Sending RAW to %s",Route->GetName().c_str());
1114                         Sock->WriteLine(data);
1115                 }
1116         }
1117         return true;
1118 }
1119
1120 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> params, std::string omit)
1121 {
1122         log(DEBUG,"ALLBUTONE: Comes from %s SHOULD NOT go back to %s",prefix.c_str(),omit.c_str());
1123         // TODO: Special stuff with privmsg and notice
1124         std::string FullLine = ":" + prefix + " " + command;
1125         for (unsigned int x = 0; x < params.size(); x++)
1126         {
1127                 FullLine = FullLine + " " + params[x];
1128         }
1129         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1130         {
1131                 TreeServer* Route = TreeRoot->GetChild(x);
1132                 // Send the line IF:
1133                 // The route has a socket (its a direct connection)
1134                 // The route isnt the one to be omitted
1135                 // The route isnt the path to the one to be omitted
1136                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (BestRouteTo(omit) != Route))
1137                 {
1138                         TreeSocket* Sock = Route->GetSocket();
1139                         log(DEBUG,"Sending to %s",Route->GetName().c_str());
1140                         Sock->WriteLine(FullLine);
1141                 }
1142         }
1143         return true;
1144 }
1145
1146 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> params)
1147 {
1148         Srv->Log(DEBUG,"ONETOMANY: "+command);
1149         std::string FullLine = ":" + prefix + " " + command;
1150         for (unsigned int x = 0; x < params.size(); x++)
1151         {
1152                 FullLine = FullLine + " " + params[x];
1153         }
1154         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1155         {
1156                 TreeServer* Route = TreeRoot->GetChild(x);
1157                 if (Route->GetSocket())
1158                 {
1159                         TreeSocket* Sock = Route->GetSocket();
1160                         Sock->WriteLine(FullLine);
1161                 }
1162         }
1163         return true;
1164 }
1165
1166 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> params, std::string target)
1167 {
1168         TreeServer* Route = BestRouteTo(target);
1169         if (Route)
1170         {
1171                 std::string FullLine = ":" + prefix + " " + command;
1172                 for (unsigned int x = 0; x < params.size(); x++)
1173                 {
1174                         FullLine = FullLine + " " + params[x];
1175                 }
1176                 if (Route->GetSocket())
1177                 {
1178                         TreeSocket* Sock = Route->GetSocket();
1179                         Sock->WriteLine(FullLine);
1180                 }
1181                 return true;
1182         }
1183         else
1184         {
1185                 log(DEBUG,"Could not route message with target %s: %s",target.c_str(),command.c_str());
1186                 return true;
1187         }
1188 }
1189
1190
1191 class ModuleSpanningTree : public Module
1192 {
1193         std::vector<TreeSocket*> Bindings;
1194         int line;
1195
1196  public:
1197
1198         void ReadConfiguration(bool rebind)
1199         {
1200                 if (rebind)
1201                 {
1202                         for (int j =0; j < Conf->Enumerate("bind"); j++)
1203                         {
1204                                 std::string Type = Conf->ReadValue("bind","type",j);
1205                                 std::string IP = Conf->ReadValue("bind","address",j);
1206                                 long Port = Conf->ReadInteger("bind","port",j,true);
1207                                 if (Type == "servers")
1208                                 {
1209                                         if (IP == "*")
1210                                         {
1211                                                 IP = "";
1212                                         }
1213                                         TreeSocket* listener = new TreeSocket(IP.c_str(),Port,true,10);
1214                                         if (listener->GetState() == I_LISTENING)
1215                                         {
1216                                                 Srv->AddSocket(listener);
1217                                                 Bindings.push_back(listener);
1218                                         }
1219                                         else
1220                                         {
1221                                                 log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
1222                                                 listener->Close();
1223                                                 delete listener;
1224                                         }
1225                                 }
1226                         }
1227                 }
1228                 LinkBlocks.clear();
1229                 for (int j =0; j < Conf->Enumerate("link"); j++)
1230                 {
1231                         Link L;
1232                         L.Name = Conf->ReadValue("link","name",j);
1233                         L.IPAddr = Conf->ReadValue("link","ipaddr",j);
1234                         L.Port = Conf->ReadInteger("link","port",j,true);
1235                         L.SendPass = Conf->ReadValue("link","sendpass",j);
1236                         L.RecvPass = Conf->ReadValue("link","recvpass",j);
1237                         LinkBlocks.push_back(L);
1238                         log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
1239                 }
1240         }
1241
1242         ModuleSpanningTree()
1243         {
1244                 Srv = new Server;
1245                 Conf = new ConfigReader;
1246                 Bindings.clear();
1247
1248                 // Create the root of the tree
1249                 TreeRoot = new TreeServer(Srv->GetServerName(),Srv->GetServerDescription());
1250
1251                 ReadConfiguration(true);
1252         }
1253
1254         void ShowLinks(TreeServer* Current, userrec* user, int hops)
1255         {
1256                 std::string Parent = TreeRoot->GetName();
1257                 if (Current->GetParent())
1258                 {
1259                         Parent = Current->GetParent()->GetName();
1260                 }
1261                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1262                 {
1263                         ShowLinks(Current->GetChild(q),user,hops+1);
1264                 }
1265                 WriteServ(user->fd,"364 %s %s %s :%d %s",user->nick,Current->GetName().c_str(),Parent.c_str(),hops,Current->GetDesc().c_str());
1266         }
1267
1268         void HandleLinks(char** parameters, int pcnt, userrec* user)
1269         {
1270                 ShowLinks(TreeRoot,user,0);
1271                 WriteServ(user->fd,"365 %s * :End of /LINKS list.",user->nick);
1272                 return;
1273         }
1274
1275         void HandleLusers(char** parameters, int pcnt, userrec* user)
1276         {
1277                 return;
1278         }
1279
1280         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
1281
1282         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80])
1283         {
1284                 if (line < 128)
1285                 {
1286                         for (int t = 0; t < depth; t++)
1287                         {
1288                                 matrix[line][t] = ' ';
1289                         }
1290                         strlcpy(&matrix[line][depth],Current->GetName().c_str(),80);
1291                         line++;
1292                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
1293                         {
1294                                 ShowMap(Current->GetChild(q),user,depth+2,matrix);
1295                         }
1296                 }
1297         }
1298
1299         // Ok, prepare to be confused.
1300         // After much mulling over how to approach this, it struck me that
1301         // the 'usual' way of doing a /MAP isnt the best way. Instead of
1302         // keeping track of a ton of ascii characters, and line by line
1303         // under recursion working out where to place them using multiplications
1304         // and divisons, we instead render the map onto a backplane of characters
1305         // (a character matrix), then draw the branches as a series of "L" shapes
1306         // from the nodes. This is not only friendlier on CPU it uses less stack.
1307
1308         void HandleMap(char** parameters, int pcnt, userrec* user)
1309         {
1310                 // This array represents a virtual screen which we will
1311                 // "scratch" draw to, as the console device of an irc
1312                 // client does not provide for a proper terminal.
1313                 char matrix[128][80];
1314                 for (unsigned int t = 0; t < 128; t++)
1315                 {
1316                         matrix[t][0] = '\0';
1317                 }
1318                 line = 0;
1319                 // The only recursive bit is called here.
1320                 ShowMap(TreeRoot,user,0,matrix);
1321                 // Process each line one by one. The algorithm has a limit of
1322                 // 128 servers (which is far more than a spanning tree should have
1323                 // anyway, so we're ok). This limit can be raised simply by making
1324                 // the character matrix deeper, 128 rows taking 10k of memory.
1325                 for (int l = 1; l < line; l++)
1326                 {
1327                         // scan across the line looking for the start of the
1328                         // servername (the recursive part of the algorithm has placed
1329                         // the servers at indented positions depending on what they
1330                         // are related to)
1331                         int first_nonspace = 0;
1332                         while (matrix[l][first_nonspace] == ' ')
1333                         {
1334                                 first_nonspace++;
1335                         }
1336                         first_nonspace--;
1337                         // Draw the `- (corner) section: this may be overwritten by
1338                         // another L shape passing along the same vertical pane, becoming
1339                         // a |- (branch) section instead.
1340                         matrix[l][first_nonspace] = '-';
1341                         matrix[l][first_nonspace-1] = '`';
1342                         int l2 = l - 1;
1343                         // Draw upwards until we hit the parent server, causing possibly
1344                         // other corners (`-) to become branches (|-)
1345                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
1346                         {
1347                                 matrix[l2][first_nonspace-1] = '|';
1348                                 l2--;
1349                         }
1350                 }
1351                 // dump the whole lot to the user. This is the easy bit, honest.
1352                 for (int t = 0; t < line; t++)
1353                 {
1354                         WriteServ(user->fd,"006 %s :%s",user->nick,&matrix[t][0]);
1355                 }
1356                 WriteServ(user->fd,"007 %s :End of /MAP",user->nick);
1357                 return;
1358         }
1359
1360         int HandleSquit(char** parameters, int pcnt, userrec* user)
1361         {
1362                 return 1;
1363         }
1364
1365         int HandleConnect(char** parameters, int pcnt, userrec* user)
1366         {
1367                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
1368                 {
1369                         if (Srv->MatchText(x->Name.c_str(),parameters[0]))
1370                         {
1371                                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: Connecting to server: %s (%s:%d)",user->nick,x->Name.c_str(),x->IPAddr.c_str(),x->Port);
1372                                 TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name);
1373                                 Srv->AddSocket(newsocket);
1374                                 return 1;
1375                         }
1376                 }
1377                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: No matching server could be found in the config file.",user->nick);
1378                 return 1;
1379         }
1380
1381         virtual int OnPreCommand(std::string command, char **parameters, int pcnt, userrec *user)
1382         {
1383                 if (command == "CONNECT")
1384                 {
1385                         return this->HandleConnect(parameters,pcnt,user);
1386                 }
1387                 else if (command == "SQUIT")
1388                 {
1389                         return this->HandleSquit(parameters,pcnt,user);
1390                 }
1391                 else if (command == "MAP")
1392                 {
1393                         this->HandleMap(parameters,pcnt,user);
1394                         return 1;
1395                 }
1396                 else if (command == "LUSERS")
1397                 {
1398                         this->HandleLusers(parameters,pcnt,user);
1399                         return 1;
1400                 }
1401                 else if (command == "LINKS")
1402                 {
1403                         this->HandleLinks(parameters,pcnt,user);
1404                         return 1;
1405                 }
1406                 return 0;
1407         }
1408
1409         virtual void OnGetServerDescription(std::string servername,std::string &description)
1410         {
1411                 TreeServer* s = FindServer(servername);
1412                 if (s)
1413                 {
1414                         description = s->GetDesc();
1415                 }
1416         }
1417
1418         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
1419         {
1420                 if (std::string(source->server) == Srv->GetServerName())
1421                 {
1422                         std::deque<std::string> params;
1423                         params.push_back(dest->nick);
1424                         params.push_back(channel->name);
1425                         DoOneToMany(source->nick,"INVITE",params);
1426                 }
1427         }
1428
1429         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, std::string topic)
1430         {
1431                 std::deque<std::string> params;
1432                 params.push_back(chan->name);
1433                 params.push_back(":"+topic);
1434                 DoOneToMany(user->nick,"TOPIC",params);
1435         }
1436
1437         virtual void OnUserNotice(userrec* user, void* dest, int target_type, std::string text)
1438         {
1439                 if (target_type == TYPE_USER)
1440                 {
1441                         userrec* d = (userrec*)dest;
1442                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
1443                         {
1444                                 std::deque<std::string> params;
1445                                 params.clear();
1446                                 params.push_back(d->nick);
1447                                 params.push_back(":"+text);
1448                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
1449                         }
1450                 }
1451                 else
1452                 {
1453                         if (std::string(user->server) == Srv->GetServerName())
1454                         {
1455                                 chanrec *c = (chanrec*)dest;
1456                                 std::deque<std::string> params;
1457                                 params.push_back(c->name);
1458                                 params.push_back(":"+text);
1459                                 DoOneToMany(user->nick,"NOTICE",params);
1460                         }
1461                 }
1462         }
1463
1464         virtual void OnUserMessage(userrec* user, void* dest, int target_type, std::string text)
1465         {
1466                 if (target_type == TYPE_USER)
1467                 {
1468                         // route private messages which are targetted at clients only to the server
1469                         // which needs to receive them
1470                         userrec* d = (userrec*)dest;
1471                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
1472                         {
1473                                 std::deque<std::string> params;
1474                                 params.clear();
1475                                 params.push_back(d->nick);
1476                                 params.push_back(":"+text);
1477                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
1478                         }
1479                 }
1480                 else
1481                 {
1482                         if (std::string(user->server) == Srv->GetServerName())
1483                         {
1484                                 chanrec *c = (chanrec*)dest;
1485                                 std::deque<std::string> params;
1486                                 params.push_back(c->name);
1487                                 params.push_back(":"+text);
1488                                 DoOneToMany(user->nick,"PRIVMSG",params);
1489                         }
1490                 }
1491         }
1492
1493         virtual void OnUserJoin(userrec* user, chanrec* channel)
1494         {
1495                 // Only do this for local users
1496                 if (std::string(user->server) == Srv->GetServerName())
1497                 {
1498                         log(DEBUG,"**** User on %s JOINS %s",user->server,channel->name);
1499                         std::deque<std::string> params;
1500                         params.clear();
1501                         params.push_back(channel->name);
1502                         if (*channel->key)
1503                         {
1504                                 log(DEBUG,"**** With key %s",channel->key);
1505                                 // if the channel has a key, force the join by emulating the key.
1506                                 params.push_back(channel->key);
1507                         }
1508                         DoOneToMany(user->nick,"JOIN",params);
1509                 }
1510         }
1511
1512         virtual void OnUserPart(userrec* user, chanrec* channel)
1513         {
1514                 if (std::string(user->server) == Srv->GetServerName())
1515                 {
1516                         log(DEBUG,"**** User on %s PARTS %s",user->server,channel->name);
1517                         std::deque<std::string> params;
1518                         params.clear();
1519                         params.push_back(channel->name);
1520                         DoOneToMany(user->nick,"PART",params);
1521                 }
1522         }
1523
1524         virtual void OnUserConnect(userrec* user)
1525         {
1526                 char agestr[MAXBUF];
1527                 if (std::string(user->server) == Srv->GetServerName())
1528                 {
1529                         log(DEBUG,"**** User on %s CONNECTS: %s",user->server,user->nick);
1530                         std::deque<std::string> params;
1531                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
1532                         params.clear();
1533                         params.push_back(agestr);
1534                         params.push_back(user->nick);
1535                         params.push_back(user->host);
1536                         params.push_back(user->dhost);
1537                         params.push_back(user->ident);
1538                         params.push_back("+"+std::string(user->modes));
1539                         params.push_back(user->ip);
1540                         params.push_back(":"+std::string(user->fullname));
1541                         DoOneToMany(Srv->GetServerName(),"NICK",params);
1542                 }
1543         }
1544
1545         virtual void OnUserQuit(userrec* user, std::string reason)
1546         {
1547                 if (std::string(user->server) == Srv->GetServerName())
1548                 {
1549                         log(DEBUG,"**** User on %s QUITS: %s",user->server,user->nick);
1550                         std::deque<std::string> params;
1551                         params.push_back(":"+reason);
1552                         DoOneToMany(user->nick,"QUIT",params);
1553                 }
1554         }
1555
1556         virtual void OnUserPostNick(userrec* user, std::string oldnick)
1557         {
1558                 if (std::string(user->server) == Srv->GetServerName())
1559                 {
1560                         log(DEBUG,"**** User on %s changes NICK: %s",user->server,user->nick);
1561                         std::deque<std::string> params;
1562                         params.push_back(user->nick);
1563                         DoOneToMany(oldnick,"NICK",params);
1564                 }
1565         }
1566
1567         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, std::string reason)
1568         {
1569                 if (std::string(source->server) == Srv->GetServerName())
1570                 {
1571                         log(DEBUG,"**** User on %s KICKs: %s %s",source->server,source->nick,user->nick);
1572                         std::deque<std::string> params;
1573                         params.push_back(chan->name);
1574                         params.push_back(user->nick);
1575                         params.push_back(":"+reason);
1576                         DoOneToMany(source->nick,"KICK",params);
1577                 }
1578         }
1579
1580         virtual void OnRemoteKill(userrec* source, userrec* dest, std::string reason)
1581         {
1582                 std::deque<std::string> params;
1583                 params.push_back(dest->nick);
1584                 params.push_back(":"+reason);
1585                 DoOneToMany(source->nick,"KILL",params);
1586         }
1587
1588         virtual void OnRehash(std::string parameter)
1589         {
1590                 if (parameter != "")
1591                 {
1592                         std::deque<std::string> params;
1593                         params.push_back(parameter);
1594                         DoOneToMany(Srv->GetServerName(),"REHASH",params);
1595                         // check for self
1596                         if (Srv->MatchText(Srv->GetServerName(),parameter))
1597                         {
1598                                 Srv->SendOpers("*** Remote rehash initiated from server \002"+Srv->GetServerName()+"\002.");
1599                                 Srv->RehashServer();
1600                         }
1601                 }
1602         }
1603
1604         // note: the protocol does not allow direct umode +o except
1605         // via NICK with 8 params. sending OPERTYPE infers +o modechange
1606         // locally.
1607         virtual void OnOper(userrec* user, std::string opertype)
1608         {
1609                 if (std::string(user->server) == Srv->GetServerName())
1610                 {
1611                         std::deque<std::string> params;
1612                         params.push_back(opertype);
1613                         DoOneToMany(user->nick,"OPERTYPE",params);
1614                 }
1615         }
1616
1617         virtual void OnMode(userrec* user, void* dest, int target_type, std::string text)
1618         {
1619                 log(DEBUG,"*** ONMODE TRIGGER");
1620                 if (std::string(user->server) == Srv->GetServerName())
1621                 {
1622                         log(DEBUG,"*** LOCAL");
1623                         if (target_type == TYPE_USER)
1624                         {
1625                                 userrec* u = (userrec*)dest;
1626                                 std::deque<std::string> params;
1627                                 params.push_back(u->nick);
1628                                 params.push_back(text);
1629                                 DoOneToMany(user->nick,"MODE",params);
1630                         }
1631                         else
1632                         {
1633                                 chanrec* c = (chanrec*)dest;
1634                                 std::deque<std::string> params;
1635                                 params.push_back(c->name);
1636                                 params.push_back(text);
1637                                 DoOneToMany(user->nick,"MODE",params);
1638                         }
1639                 }
1640         }
1641
1642         virtual void ProtoSendMode(void* opaque, int target_type, void* target, std::string modeline)
1643         {
1644                 TreeSocket* s = (TreeSocket*)opaque;
1645                 if (target)
1646                 {
1647                         if (target_type == TYPE_USER)
1648                         {
1649                                 userrec* u = (userrec*)target;
1650                                 opaque->WriteLine(":"+s->GetName()+" FMODE "+u->nick+" "+modeline);
1651                         }
1652                         else
1653                         {
1654                                 chanrec* c = (chanrec*)target;
1655                                 opaque->WriteLine(":"+s->GetName()+" FMODE "+c->name+" "+modeline);
1656                         }
1657                 }
1658         }
1659
1660         virtual ~ModuleSpanningTree()
1661         {
1662                 delete Srv;
1663         }
1664
1665         virtual Version GetVersion()
1666         {
1667                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
1668         }
1669 };
1670
1671
1672 class ModuleSpanningTreeFactory : public ModuleFactory
1673 {
1674  public:
1675         ModuleSpanningTreeFactory()
1676         {
1677         }
1678
1679         ~ModuleSpanningTreeFactory()
1680         {
1681         }
1682
1683         virtual Module * CreateModule()
1684         {
1685                 return new ModuleSpanningTree;
1686         }
1687
1688 };
1689
1690
1691 extern "C" void * init_module( void )
1692 {
1693         TreeProtocolModule = new ModuleSpanningTreeFactory;
1694         return TreeProtocolModule;
1695 }
1696