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 class ModuleSpanningTree;
  46 static ModuleSpanningTree* TreeProtocolModule;
  47
  48 extern std::vector<Module*> modules;
  49 extern std::vector<ircd_module*> factory;
  50 extern int MODCOUNT;
  51
  52 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  53
  54 typedef nspace::hash_map<std::string, userrec*, nspace::hash<string>, irc::StrHashComp> user_hash;
  55 typedef nspace::hash_map<std::string, chanrec*, nspace::hash<string>, irc::StrHashComp> chan_hash;
  56
  57 extern user_hash clientlist;
  58 extern chan_hash chanlist;
  59
  60 class TreeServer;
  61 class TreeSocket;
  62
  63 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> params, std::string target);
  64 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> params, std::string omit);
  65 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> params);
  66 bool DoOneToAllButSenderRaw(std::string data,std::string omit);
  67
  68 class TreeServer
  69 {
  70         TreeServer* Parent;
  71         std::vector<TreeServer*> Children;
  72         std::string ServerName;
  73         std::string ServerDesc;
  74         std::string VersionString;
  75         int UserCount;
  76         int OperCount;
  77         TreeSocket* Socket;     // for directly connected servers this points at the socket object
  78
  79  public:
  80
  81         TreeServer()
  82         {
  83                 Parent = NULL;
  84                 ServerName = "";
  85                 ServerDesc = "";
  86                 VersionString = "";
  87                 UserCount = OperCount = 0;
  88         }
  89
  90         TreeServer(std::string Name, std::string Desc) : ServerName(Name), ServerDesc(Desc)
  91         {
  92                 Parent = NULL;
  93                 VersionString = "";
  94                 UserCount = OperCount = 0;
  95         }
  96
  97         TreeServer(std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock) : Parent(Above), ServerName(Name), ServerDesc(Desc), Socket(Sock)
  98         {
  99                 VersionString = "";
 100                 UserCount = OperCount = 0;
 101         }
 102
 103         std::string GetName()
 104         {
 105                 return this->ServerName;
 106         }
 107
 108         std::string GetDesc()
 109         {
 110                 return this->ServerDesc;
 111         }
 112
 113         std::string GetVersion()
 114         {
 115                 return this->VersionString;
 116         }
 117
 118         int GetUserCount()
 119         {
 120                 return this->UserCount;
 121         }
 122
 123         int GetOperCount()
 124         {
 125                 return this->OperCount;
 126         }
 127
 128         TreeSocket* GetSocket()
 129         {
 130                 return this->Socket;
 131         }
 132
 133         TreeServer* GetParent()
 134         {
 135                 return this->Parent;
 136         }
 137
 138         unsigned int ChildCount()
 139         {
 140                 return Children.size();
 141         }
 142
 143         TreeServer* GetChild(unsigned int n)
 144         {
 145                 if (n < Children.size())
 146                 {
 147                         return Children[n];
 148                 }
 149                 else
 150                 {
 151                         return NULL;
 152                 }
 153         }
 154
 155         void AddChild(TreeServer* Child)
 156         {
 157                 Children.push_back(Child);
 158         }
 159
 160         bool DelChild(TreeServer* Child)
 161         {
 162                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 163                 {
 164                         if (*a == Child)
 165                         {
 166                                 Children.erase(a);
 167                                 return true;
 168                         }
 169                 }
 170                 return false;
 171         }
 172
 173         // removes child nodes of this node, and of that node, etc etc
 174         bool Tidy()
 175         {
 176                 bool stillchildren = true;
 177                 while (stillchildren)
 178                 {
 179                         stillchildren = false;
 180                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 181                         {
 182                                 TreeServer* s = (TreeServer*)*a;
 183                                 s->Tidy();
 184                                 Children.erase(a);
 185                                 delete s;
 186                                 stillchildren = true;
 187                                 break;
 188                         }
 189                 }
 190                 return true;
 191         }
 192 };
 193
 194 class Link
 195 {
 196  public:
 197          std::string Name;
 198          std::string IPAddr;
 199          int Port;
 200          std::string SendPass;
 201          std::string RecvPass;
 202 };
 203
 204 /* $ModDesc: Povides a spanning tree server link protocol */
 205
 206 Server *Srv;
 207 ConfigReader *Conf;
 208 TreeServer *TreeRoot;
 209 std::vector<Link> LinkBlocks;
 210
 211 TreeServer* RouteEnumerate(TreeServer* Current, std::string ServerName)
 212 {
 213         if (Current->GetName() == ServerName)
 214                 return Current;
 215         for (unsigned int q = 0; q < Current->ChildCount(); q++)
 216         {
 217                 TreeServer* found = RouteEnumerate(Current->GetChild(q),ServerName);
 218                 if (found)
 219                 {
 220                         return found;
 221                 }
 222         }
 223         return NULL;
 224 }
 225
 226 // Returns the locally connected server we must route a
 227 // message through to reach server 'ServerName'. This
 228 // only applies to one-to-one and not one-to-many routing.
 229 TreeServer* BestRouteTo(std::string ServerName)
 230 {
 231         log(DEBUG,"Finding best route to %s",ServerName.c_str());
 232         if (ServerName.c_str() == TreeRoot->GetName())
 233         {
 234                 log(DEBUG,"Cant route to myself!!!");
 235                 return NULL;
 236         }
 237         // first, find the server by recursively walking the tree
 238         TreeServer* Found = RouteEnumerate(TreeRoot,ServerName);
 239         // did we find it? If not, they did something wrong, abort.
 240         if (!Found)
 241         {
 242                 log(DEBUG,"Failed to find %s by walking tree!",ServerName.c_str());
 243                 return NULL;
 244         }
 245         else
 246         {
 247                 // The server exists, follow its parent nodes until
 248                 // the parent of the current is 'TreeRoot', we know
 249                 // then that this is a directly-connected server.
 250                 while ((Found) && (Found->GetParent() != TreeRoot))
 251                 {
 252                         Found = Found->GetParent();
 253                 }
 254                 log(DEBUG,"Route to %s is via %s",ServerName.c_str(),Found->GetName().c_str());
 255                 return Found;
 256         }
 257 }
 258
 259 bool LookForServer(TreeServer* Current, std::string ServerName)
 260 {
 261         if (ServerName == Current->GetName())
 262                 return true;
 263         for (unsigned int q = 0; q < Current->ChildCount(); q++)
 264         {
 265                 if (LookForServer(Current->GetChild(q),ServerName))
 266                         return true;
 267         }
 268         return false;
 269 }
 270
 271 TreeServer* Found;
 272
 273 void RFindServer(TreeServer* Current, std::string ServerName)
 274 {
 275         if ((ServerName == Current->GetName()) && (!Found))
 276         {
 277                 Found = Current;
 278                 log(DEBUG,"Found server %s desc %s",Current->GetName().c_str(),Current->GetDesc().c_str());
 279                 return;
 280         }
 281         if (!Found)
 282         {
 283                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 284                 {
 285                         if (!Found)
 286                                 RFindServer(Current->GetChild(q),ServerName);
 287                 }
 288         }
 289         return;
 290 }
 291
 292 TreeServer* FindServer(std::string ServerName)
 293 {
 294         Found = NULL;
 295         RFindServer(TreeRoot,ServerName);
 296         return Found;
 297 }
 298
 299 bool IsServer(std::string ServerName)
 300 {
 301         return LookForServer(TreeRoot,ServerName);
 302 }
 303
 304 class TreeSocket : public InspSocket
 305 {
 306         std::string myhost;
 307         std::string in_buffer;
 308         ServerState LinkState;
 309         std::string InboundServerName;
 310         std::string InboundDescription;
 311         int num_lost_users;
 312         int num_lost_servers;
 313
 314  public:
 315
 316         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime)
 317                 : InspSocket(host, port, listening, maxtime)
 318         {
 319                 Srv->Log(DEBUG,"Create new listening");
 320                 myhost = host;
 321                 this->LinkState = LISTENER;
 322         }
 323
 324         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 325                 : InspSocket(host, port, listening, maxtime)
 326         {
 327                 Srv->Log(DEBUG,"Create new outbound");
 328                 myhost = ServerName;
 329                 this->LinkState = CONNECTING;
 330         }
 331
 332         TreeSocket(int newfd, char* ip)
 333                 : InspSocket(newfd, ip)
 334         {
 335                 Srv->Log(DEBUG,"Associate new inbound");
 336                 this->LinkState = WAIT_AUTH_1;
 337         }
 338
 339         virtual bool OnConnected()
 340         {
 341                 if (this->LinkState == CONNECTING)
 342                 {
 343                         Srv->SendOpers("*** Connection to "+myhost+"["+this->GetIP()+"] established.");
 344                         // we should send our details here.
 345                         // if the other side is satisfied, they send theirs.
 346                         // we do not need to change state here.
 347                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 348                         {
 349                                 if (x->Name == this->myhost)
 350                                 {
 351                                         // found who we're supposed to be connecting to, send the neccessary gubbins.
 352                                         this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 353                                         return true;
 354                                 }
 355                         }
 356                 }
 357                 log(DEBUG,"Outbound connection ERROR: Could not find the right link block!");
 358                 return true;
 359         }
 360
 361         virtual void OnError(InspSocketError e)
 362         {
 363         }
 364
 365         virtual int OnDisconnect()
 366         {
 367                 return true;
 368         }
 369
 370         // recursively send the server tree with distances as hops
 371         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 372         {
 373                 char command[1024];
 374                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 375                 {
 376                         TreeServer* recursive_server = Current->GetChild(q);
 377                         if (recursive_server != s)
 378                         {
 379                                 // :source.server SERVER server.name hops :Description
 380                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 381                                 this->WriteLine(command);
 382                                 // down to next level
 383                                 this->SendServers(recursive_server, s, hops+1);
 384                         }
 385                 }
 386         }
 387
 388         void SquitServer(TreeServer* Current)
 389         {
 390                 // recursively squit the servers attached to 'Current'
 391                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 392                 {
 393                         TreeServer* recursive_server = Current->GetChild(q);
 394                         this->SquitServer(recursive_server);
 395                 }
 396                 // Now we've whacked the kids, whack self
 397                 log(DEBUG,"Deleted %s",Current->GetName().c_str());
 398                 num_lost_servers++;
 399                 bool quittingpeople = true;
 400                 while (quittingpeople)
 401                 {
 402                         quittingpeople = false;
 403                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 404                         {
 405                                 if (!strcasecmp(u->second->server,Current->GetName().c_str()))
 406                                 {
 407                                         log(DEBUG,"Quitting user %s of server %s",u->second->nick,u->second->server);
 408                                         Srv->QuitUser(u->second,Current->GetName()+" "+std::string(Srv->GetServerName()));
 409                                         num_lost_users++;
 410                                         quittingpeople = true;
 411                                         break;
 412                                 }
 413                         }
 414                 }
 415         }
 416
 417         void Squit(TreeServer* Current,std::string reason)
 418         {
 419                 if (Current)
 420                 {
 421                         std::deque<std::string> params;
 422                         params.push_back(Current->GetName());
 423                         params.push_back(":"+reason);
 424                         DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
 425                         if (Current->GetParent() == TreeRoot)
 426                         {
 427                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
 428                         }
 429                         else
 430                         {
 431                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
 432                         }
 433                         num_lost_servers = 0;
 434                         num_lost_users = 0;
 435                         SquitServer(Current);
 436                         Current->Tidy();
 437                         Current->GetParent()->DelChild(Current);
 438                         delete Current;
 439                         WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
 440                 }
 441                 else
 442                 {
 443                         log(DEBUG,"Squit from unknown server");
 444                 }
 445         }
 446
 447         bool ForceMode(std::string source, std::deque<std::string> params)
 448         {
 449                 userrec* who = new userrec;
 450                 who->fd = FD_MAGIC_NUMBER;
 451                 if (params.size() < 2)
 452                         return true;
 453                 char* modelist[255];
 454                 for (unsigned int q = 0; q < params.size(); q++)
 455                 {
 456                         modelist[q] = (char*)params[q].c_str();
 457                 }
 458                 Srv->SendMode(modelist,params.size(),who);
 459                 DoOneToAllButSender(source,"FMODE",params,source);
 460                 delete who;
 461                 return true;
 462         }
 463
 464         bool ForceTopic(std::string source, std::deque<std::string> params)
 465         {
 466                 // FTOPIC %s %lu %s :%s
 467                 if (params.size() != 4)
 468                         return true;
 469                 std::string channel = params[0];
 470                 time_t ts = atoi(params[1].c_str());
 471                 std::string setby = params[2];
 472                 std::string topic = params[3];
 473
 474                 chanrec* c = Srv->FindChannel(channel);
 475                 if (c)
 476                 {
 477                         if ((ts >= c->topicset) || (!*c->topic))
 478                         {
 479                                 strlcpy(c->topic,topic.c_str(),MAXTOPIC);
 480                                 strlcpy(c->setby,setby.c_str(),NICKMAX);
 481                                 c->topicset = ts;
 482                                 WriteChannelWithServ((char*)source.c_str(), c, "TOPIC %s :%s", c->name, c->topic);
 483                         }
 484
 485                 }
 486
 487                 // all done, send it on its way
 488                 params[3] = ":" + params[3];
 489                 DoOneToAllButSender(source,"FTOPIC",params,source);
 490
 491                 return true;
 492         }
 493
 494         bool ForceJoin(std::string source, std::deque<std::string> params)
 495         {
 496                 if (params.size() < 1)
 497                         return true;
 498                 for (unsigned int channelnum = 0; channelnum < params.size(); channelnum++)
 499                 {
 500                         // process one channel at a time, applying modes.
 501                         char* channel = (char*)params[channelnum].c_str();
 502                         char permissions = *channel;
 503                         char* mode = NULL;
 504                         switch (permissions)
 505                         {
 506                                 case '@':
 507                                         channel++;
 508                                         mode = "+o";
 509                                 break;
 510                                 case '%':
 511                                         channel++;
 512                                         mode = "+h";
 513                                 break;
 514                                 case '+':
 515                                         channel++;
 516                                         mode = "+v";
 517                                 break;
 518                         }
 519                         userrec* who = Srv->FindNick(source);
 520                         if (who)
 521                         {
 522                                 char* key = "";
 523                                 chanrec* chan = Srv->FindChannel(channel);
 524                                 if ((chan) && (*chan->key))
 525                                 {
 526                                         key = chan->key;
 527                                 }
 528                                 Srv->JoinUserToChannel(who,channel,key);
 529                                 if (mode)
 530                                 {
 531                                         char* modelist[3];
 532                                         modelist[0] = channel;
 533                                         modelist[1] = mode;
 534                                         modelist[2] = who->nick;
 535                                         Srv->SendMode(modelist,3,who);
 536                                 }
 537                                 DoOneToAllButSender(source,"FJOIN",params,who->server);
 538                         }
 539                 }
 540                 return true;
 541         }
 542
 543         bool IntroduceClient(std::string source, std::deque<std::string> params)
 544         {
 545                 if (params.size() < 8)
 546                         return true;
 547                 // NICK age nick host dhost ident +modes ip :gecos
 548                 //       0   1    2    3      4     5    6   7
 549                 std::string nick = params[1];
 550                 std::string host = params[2];
 551                 std::string dhost = params[3];
 552                 std::string ident = params[4];
 553                 time_t age = atoi(params[0].c_str());
 554                 std::string modes = params[5];
 555                 if (*(modes.c_str()) == '+')
 556                 {
 557                         char* m = (char*)modes.c_str();
 558                         m++;
 559                         modes = m;
 560                 }
 561                 std::string ip = params[6];
 562                 std::string gecos = params[7];
 563                 char* tempnick = (char*)nick.c_str();
 564                 log(DEBUG,"Introduce client %s!%s@%s",tempnick,ident.c_str(),host.c_str());
 565
 566                 user_hash::iterator iter;
 567                 iter = clientlist.find(tempnick);
 568                 if (iter != clientlist.end())
 569                 {
 570                         // nick collision
 571                         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);
 572                         this->WriteLine(":"+Srv->GetServerName()+" KILL "+tempnick+" :Nickname collision");
 573                         return true;
 574                 }
 575
 576                 clientlist[tempnick] = new userrec();
 577                 clientlist[tempnick]->fd = FD_MAGIC_NUMBER;
 578                 strlcpy(clientlist[tempnick]->nick, tempnick,NICKMAX);
 579                 strlcpy(clientlist[tempnick]->host, host.c_str(),160);
 580                 strlcpy(clientlist[tempnick]->dhost, dhost.c_str(),160);
 581                 clientlist[tempnick]->server = (char*)FindServerNamePtr(source.c_str());
 582                 strlcpy(clientlist[tempnick]->ident, ident.c_str(),IDENTMAX);
 583                 strlcpy(clientlist[tempnick]->fullname, gecos.c_str(),MAXGECOS);
 584                 clientlist[tempnick]->registered = 7;
 585                 clientlist[tempnick]->signon = age;
 586                 strlcpy(clientlist[tempnick]->ip,ip.c_str(),16);
 587                 for (int i = 0; i < MAXCHANS; i++)
 588                 {
 589                         clientlist[tempnick]->chans[i].channel = NULL;
 590                         clientlist[tempnick]->chans[i].uc_modes = 0;
 591                 }
 592                 params[7] = ":" + params[7];
 593                 DoOneToAllButSender(source,"NICK",params,source);
 594                 return true;
 595         }
 596
 597         void SendChannelModes(TreeServer* Current)
 598         {
 599                 char data[MAXBUF];
 600                 for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 601                 {
 602                         snprintf(data,MAXBUF,":%s FMODE %s +%s",Srv->GetServerName().c_str(),c->second->name,chanmodes(c->second));
 603                         this->WriteLine(data);
 604                         if (*c->second->topic)
 605                         {
 606                                 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);
 607                                 this->WriteLine(data);
 608                         }
 609                         for (BanList::iterator b = c->second->bans.begin(); b != c->second->bans.end(); b++)
 610                         {
 611                                 snprintf(data,MAXBUF,":%s FMODE %s +b %s",Srv->GetServerName().c_str(),c->second->name,b->data);
 612                                 this->WriteLine(data);
 613                         }
 614                         FOREACH_MOD OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this);
 615                 }
 616         }
 617
 618         // send all users and their channels
 619         void SendUsers(TreeServer* Current)
 620         {
 621                 char data[MAXBUF];
 622                 for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 623                 {
 624                         if (u->second->registered == 7)
 625                         {
 626                                 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);
 627                                 this->WriteLine(data);
 628                                 if (strchr(u->second->modes,'o'))
 629                                 {
 630                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
 631                                 }
 632                                 char* chl = chlist(u->second,u->second);
 633                                 if (*chl)
 634                                 {
 635                                         this->WriteLine(":"+std::string(u->second->nick)+" FJOIN "+std::string(chl));
 636                                 }
 637                                 FOREACH_MOD OnSyncUser(u->second,(Module*)TreeProtocolModule,(void*)this);
 638                         }
 639                 }
 640         }
 641
 642         void DoBurst(TreeServer* s)
 643         {
 644                 log(DEBUG,"Beginning network burst");
 645                 Srv->SendOpers("*** Bursting to "+s->GetName()+".");
 646                 this->WriteLine("BURST");
 647                 // Send server tree
 648                 this->SendServers(TreeRoot,s,1);
 649                 // Send users and their channels
 650                 this->SendUsers(s);
 651                 // TODO: Send everything else (channel modes etc)
 652                 this->SendChannelModes(s);
 653                 this->WriteLine("ENDBURST");
 654         }
 655
 656         virtual bool OnDataReady()
 657         {
 658                 char* data = this->Read();
 659                 if (data)
 660                 {
 661                         this->in_buffer += data;
 662                         while (in_buffer.find("\n") != std::string::npos)
 663                         {
 664                                 char* line = (char*)in_buffer.c_str();
 665                                 std::string ret = "";
 666                                 while ((*line != '\n') && (strlen(line)))
 667                                 {
 668                                         ret = ret + *line;
 669                                         line++;
 670                                 }
 671                                 if ((*line == '\n') || (*line == '\r'))
 672                                         line++;
 673                                 in_buffer = line;
 674                                 if (!this->ProcessLine(ret))
 675                                 {
 676                                         return false;
 677                                 }
 678                         }
 679                 }
 680                 return (data != NULL);
 681         }
 682
 683         int WriteLine(std::string line)
 684         {
 685                 return this->Write(line + "\r\n");
 686         }
 687
 688         bool Error(std::deque<std::string> params)
 689         {
 690                 if (params.size() < 1)
 691                         return false;
 692                 std::string Errmsg = params[0];
 693                 std::string SName = myhost;
 694                 if (InboundServerName != "")
 695                 {
 696                         SName = InboundServerName;
 697                 }
 698                 Srv->SendOpers("*** ERROR from "+SName+": "+Errmsg);
 699                 // we will return false to cause the socket to close.
 700                 return false;
 701         }
 702
 703         bool OperType(std::string prefix, std::deque<std::string> params)
 704         {
 705                 if (params.size() != 1)
 706                         return true;
 707                 std::string opertype = params[0];
 708                 userrec* u = Srv->FindNick(prefix);
 709                 if (u)
 710                 {
 711                         strlcpy(u->oper,opertype.c_str(),NICKMAX);
 712                         if (!strchr(u->modes,'o'))
 713                         {
 714                                 strcat(u->modes,"o");
 715                         }
 716                         DoOneToAllButSender(u->server,"OPERTYPE",params,u->server);
 717                 }
 718                 return true;
 719         }
 720
 721         bool RemoteRehash(std::string prefix, std::deque<std::string> params)
 722         {
 723                 if (params.size() < 1)
 724                         return true;
 725                 std::string servermask = params[0];
 726                 if (Srv->MatchText(Srv->GetServerName(),servermask))
 727                 {
 728                         Srv->SendOpers("*** Remote rehash initiated from server \002"+prefix+"\002.");
 729                         Srv->RehashServer();
 730                         TreeProtocolModule->ReadConfiguration(false);
 731                 }
 732                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
 733                 return true;
 734         }
 735
 736         bool RemoteKill(std::string prefix, std::deque<std::string> params)
 737         {
 738                 if (params.size() != 2)
 739                         return true;
 740                 std::string nick = params[0];
 741                 std::string reason = params[1];
 742                 userrec* u = Srv->FindNick(prefix);
 743                 userrec* who = Srv->FindNick(nick);
 744                 if (who)
 745                 {
 746                         std::string sourceserv = prefix;
 747                         if (u)
 748                         {
 749                                 sourceserv = u->server;
 750                         }
 751                         params[1] = ":" + params[1];
 752                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
 753                         Srv->QuitUser(who,reason);
 754                 }
 755                 return true;
 756         }
 757
 758         bool RemoteServer(std::string prefix, std::deque<std::string> params)
 759         {
 760                 if (params.size() < 4)
 761                         return false;
 762                 std::string servername = params[0];
 763                 std::string password = params[1];
 764                 // hopcount is not used for a remote server, we calculate this ourselves
 765                 std::string description = params[3];
 766                 TreeServer* ParentOfThis = FindServer(prefix);
 767                 if (!ParentOfThis)
 768                 {
 769                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
 770                         return false;
 771                 }
 772                 TreeServer* Node = new TreeServer(servername,description,ParentOfThis,NULL);
 773                 ParentOfThis->AddChild(Node);
 774                 params[3] = ":" + params[3];
 775                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
 776                 Srv->SendOpers("*** Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
 777                 return true;
 778         }
 779
 780         bool Outbound_Reply_Server(std::deque<std::string> params)
 781         {
 782                 if (params.size() < 4)
 783                         return false;
 784                 std::string servername = params[0];
 785                 std::string password = params[1];
 786                 int hops = atoi(params[2].c_str());
 787                 if (hops)
 788                 {
 789                         this->WriteLine("ERROR :Server too far away for authentication");
 790                         return false;
 791                 }
 792                 std::string description = params[3];
 793                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 794                 {
 795                         if ((x->Name == servername) && (x->RecvPass == password))
 796                         {
 797                                 // Begin the sync here. this kickstarts the
 798                                 // other side, waiting in WAIT_AUTH_2 state,
 799                                 // into starting their burst, as it shows
 800                                 // that we're happy.
 801                                 this->LinkState = CONNECTED;
 802                                 // we should add the details of this server now
 803                                 // to the servers tree, as a child of the root
 804                                 // node.
 805                                 TreeServer* Node = new TreeServer(servername,description,TreeRoot,this);
 806                                 TreeRoot->AddChild(Node);
 807                                 params[3] = ":" + params[3];
 808                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,servername);
 809                                 this->DoBurst(Node);
 810                                 return true;
 811                         }
 812                 }
 813                 this->WriteLine("ERROR :Invalid credentials");
 814                 return false;
 815         }
 816
 817         bool Inbound_Server(std::deque<std::string> params)
 818         {
 819                 if (params.size() < 4)
 820                         return false;
 821                 std::string servername = params[0];
 822                 std::string password = params[1];
 823                 int hops = atoi(params[2].c_str());
 824                 if (hops)
 825                 {
 826                         this->WriteLine("ERROR :Server too far away for authentication");
 827                         return false;
 828                 }
 829                 std::string description = params[3];
 830                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 831                 {
 832                         if ((x->Name == servername) && (x->RecvPass == password))
 833                         {
 834                                 Srv->SendOpers("*** Verified incoming server connection from \002"+servername+"\002["+this->GetIP()+"] ("+description+")");
 835                                 this->InboundServerName = servername;
 836                                 this->InboundDescription = description;
 837                                 // this is good. Send our details: Our server name and description and hopcount of 0,
 838                                 // along with the sendpass from this block.
 839                                 this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 840                                 // move to the next state, we are now waiting for THEM.
 841                                 this->LinkState = WAIT_AUTH_2;
 842                                 return true;
 843                         }
 844                 }
 845                 this->WriteLine("ERROR :Invalid credentials");
 846                 return false;
 847         }
 848
 849         std::deque<std::string> Split(std::string line, bool stripcolon)
 850         {
 851                 std::deque<std::string> n;
 852                 std::stringstream s(line);
 853                 std::string param = "";
 854                 n.clear();
 855                 int item = 0;
 856                 while (!s.eof())
 857                 {
 858                         s >> param;
 859                         //if ((param != "") && (param != "\n"))
 860                         //{
 861                                 if ((param.c_str()[0] == ':') && (item))
 862                                 {
 863                                         char* str = (char*)param.c_str();
 864                                         str++;
 865                                         param = str;
 866                                         std::string append;
 867                                         while (!s.eof())
 868                                         {
 869                                                 append = "";
 870                                                 s >> append;
 871                                                 if (append != "")
 872                                                 {
 873                                                         param = param + " " + append;
 874                                                 }
 875                                         }
 876                                 }
 877                                 item++;
 878                                 n.push_back(param);
 879                         //}
 880                 }
 881                 return n;
 882         }
 883
 884         bool ProcessLine(std::string line)
 885         {
 886                 char* l = (char*)line.c_str();
 887                 while ((strlen(l)) && (l[strlen(l)-1] == '\r') || (l[strlen(l)-1] == '\n'))
 888                         l[strlen(l)-1] = '\0';
 889                 line = l;
 890                 if (line == "")
 891                         return true;
 892                 Srv->Log(DEBUG,"inbound-line: '"+line+"'");
 893                 std::deque<std::string> params = this->Split(line,true);
 894                 std::string command = "";
 895                 std::string prefix = "";
 896                 if (((params[0].c_str())[0] == ':') && (params.size() > 1))
 897                 {
 898                         prefix = params[0];
 899                         command = params[1];
 900                         char* pref = (char*)prefix.c_str();
 901                         prefix = ++pref;
 902                         params.pop_front();
 903                         params.pop_front();
 904                 }
 905                 else
 906                 {
 907                         prefix = "";
 908                         command = params[0];
 909                         params.pop_front();
 910                 }
 911
 912                 switch (this->LinkState)
 913                 {
 914                         TreeServer* Node;
 915
 916                         case WAIT_AUTH_1:
 917                                 // Waiting for SERVER command from remote server. Server initiating
 918                                 // the connection sends the first SERVER command, listening server
 919                                 // replies with theirs if its happy, then if the initiator is happy,
 920                                 // it starts to send its net sync, which starts the merge, otherwise
 921                                 // it sends an ERROR.
 922                                 if (command == "SERVER")
 923                                 {
 924                                         return this->Inbound_Server(params);
 925                                 }
 926                                 else if (command == "ERROR")
 927                                 {
 928                                         return this->Error(params);
 929                                 }
 930                         break;
 931                         case WAIT_AUTH_2:
 932                                 // Waiting for start of other side's netmerge to say they liked our
 933                                 // password.
 934                                 if (command == "SERVER")
 935                                 {
 936                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
 937                                         // silently ignore.
 938                                         return true;
 939                                 }
 940                                 else if (command == "BURST")
 941                                 {
 942                                         this->LinkState = CONNECTED;
 943                                         Node = new TreeServer(InboundServerName,InboundDescription,TreeRoot,this);
 944                                         TreeRoot->AddChild(Node);
 945                                         params.clear();
 946                                         params.push_back(InboundServerName);
 947                                         params.push_back("*");
 948                                         params.push_back("1");
 949                                         params.push_back(":"+InboundDescription);
 950                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
 951                                         this->DoBurst(Node);
 952                                 }
 953                                 else if (command == "ERROR")
 954                                 {
 955                                         return this->Error(params);
 956                                 }
 957
 958                         break;
 959                         case LISTENER:
 960                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
 961                                 return false;
 962                         break;
 963                         case CONNECTING:
 964                                 if (command == "SERVER")
 965                                 {
 966                                         // another server we connected to, which was in WAIT_AUTH_1 state,
 967                                         // has just sent us their credentials. If we get this far, theyre
 968                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
 969                                         // if we're happy with this, we should send our netburst which
 970                                         // kickstarts the merge.
 971                                         return this->Outbound_Reply_Server(params);
 972                                 }
 973                                 else if (command == "ERROR")
 974                                 {
 975                                         return this->Error(params);
 976                                 }
 977                         break;
 978                         case CONNECTED:
 979                                 // This is the 'authenticated' state, when all passwords
 980                                 // have been exchanged and anything past this point is taken
 981                                 // as gospel.
 982                                 std::string target = "";
 983                                 if ((command == "NICK") && (params.size() > 1))
 984                                 {
 985                                         return this->IntroduceClient(prefix,params);
 986                                 }
 987                                 else if (command == "FJOIN")
 988                                 {
 989                                         return this->ForceJoin(prefix,params);
 990                                 }
 991                                 else if (command == "SERVER")
 992                                 {
 993                                         return this->RemoteServer(prefix,params);
 994                                 }
 995                                 else if (command == "ERROR")
 996                                 {
 997                                         return this->Error(params);
 998                                 }
 999                                 else if (command == "OPERTYPE")
1000                                 {
1001                                         return this->OperType(prefix,params);
1002                                 }
1003                                 else if (command == "FMODE")
1004                                 {
1005                                         return this->ForceMode(prefix,params);
1006                                 }
1007                                 else if (command == "KILL")
1008                                 {
1009                                         return this->RemoteKill(prefix,params);
1010                                 }
1011                                 else if (command == "FTOPIC")
1012                                 {
1013                                         return this->ForceTopic(prefix,params);
1014                                 }
1015                                 else if (command == "REHASH")
1016                                 {
1017                                         return this->RemoteRehash(prefix,params);
1018                                 }
1019                                 else if (command == "SQUIT")
1020                                 {
1021                                         if (params.size() == 2)
1022                                         {
1023                                                 this->Squit(FindServer(params[0]),params[1]);
1024                                         }
1025                                         return true;
1026                                 }
1027                                 else
1028                                 {
1029                                         // not a special inter-server command.
1030                                         // Emulate the actual user doing the command,
1031                                         // this saves us having a huge ugly parser.
1032                                         userrec* who = Srv->FindNick(prefix);
1033                                         std::string sourceserv = this->myhost;
1034                                         if (this->InboundServerName != "")
1035                                         {
1036                                                 sourceserv = this->InboundServerName;
1037                                         }
1038                                         if (who)
1039                                         {
1040                                                 // its a user
1041                                                 target = who->server;
1042                                                 char* strparams[127];
1043                                                 for (unsigned int q = 0; q < params.size(); q++)
1044                                                 {
1045                                                         strparams[q] = (char*)params[q].c_str();
1046                                                 }
1047                                                 log(DEBUG,"*** CALL COMMAND HANDLER FOR %s, SOURCE: '%s'",command.c_str(),who->nick);
1048                                                 Srv->CallCommandHandler(command, strparams, params.size(), who);
1049                                         }
1050                                         else
1051                                         {
1052                                                 // its not a user. Its either a server, or somethings screwed up.
1053                                                 if (IsServer(prefix))
1054                                                 {
1055                                                         target = Srv->GetServerName();
1056                                                 }
1057                                                 else
1058                                                 {
1059                                                         log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
1060                                                         return true;
1061                                                 }
1062                                         }
1063                                         return DoOneToAllButSenderRaw(line,sourceserv);
1064
1065                                 }
1066                                 return true;
1067                         break;
1068                 }
1069                 return true;
1070         }
1071
1072         virtual std::string GetName()
1073         {
1074                 std::string sourceserv = this->myhost;
1075                 if (this->InboundServerName != "")
1076                 {
1077                         sourceserv = this->InboundServerName;
1078                 }
1079                 return sourceserv;
1080         }
1081
1082         virtual void OnTimeout()
1083         {
1084                 if (this->LinkState == CONNECTING)
1085                 {
1086                         Srv->SendOpers("*** CONNECT: Connection to \002"+myhost+"\002 timed out.");
1087                 }
1088         }
1089
1090         virtual void OnClose()
1091         {
1092                 // Connection closed.
1093                 // If the connection is fully up (state CONNECTED)
1094                 // then propogate a netsplit to all peers.
1095                 std::string quitserver = this->myhost;
1096                 if (this->InboundServerName != "")
1097                 {
1098                         quitserver = this->InboundServerName;
1099                 }
1100                 TreeServer* s = FindServer(quitserver);
1101                 if (s)
1102                 {
1103                         Squit(s,"Remote host closed the connection");
1104                 }
1105         }
1106
1107         virtual int OnIncomingConnection(int newsock, char* ip)
1108         {
1109                 TreeSocket* s = new TreeSocket(newsock, ip);
1110                 Srv->AddSocket(s);
1111                 return true;
1112         }
1113 };
1114
1115 bool DoOneToAllButSenderRaw(std::string data,std::string omit)
1116 {
1117         TreeServer* omitroute = BestRouteTo(omit);
1118         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1119         {
1120                 TreeServer* Route = TreeRoot->GetChild(x);
1121                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
1122                 {
1123                         TreeSocket* Sock = Route->GetSocket();
1124                         log(DEBUG,"Sending RAW to %s",Route->GetName().c_str());
1125                         Sock->WriteLine(data);
1126                 }
1127         }
1128         return true;
1129 }
1130
1131 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> params, std::string omit)
1132 {
1133         log(DEBUG,"ALLBUTONE: Comes from %s SHOULD NOT go back to %s",prefix.c_str(),omit.c_str());
1134         TreeServer* omitroute = BestRouteTo(omit);
1135         // TODO: Special stuff with privmsg and notice
1136         std::string FullLine = ":" + prefix + " " + command;
1137         for (unsigned int x = 0; x < params.size(); x++)
1138         {
1139                 FullLine = FullLine + " " + params[x];
1140         }
1141         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1142         {
1143                 TreeServer* Route = TreeRoot->GetChild(x);
1144                 // Send the line IF:
1145                 // The route has a socket (its a direct connection)
1146                 // The route isnt the one to be omitted
1147                 // The route isnt the path to the one to be omitted
1148                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
1149                 {
1150                         TreeSocket* Sock = Route->GetSocket();
1151                         log(DEBUG,"Sending to %s",Route->GetName().c_str());
1152                         Sock->WriteLine(FullLine);
1153                 }
1154         }
1155         return true;
1156 }
1157
1158 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> params)
1159 {
1160         Srv->Log(DEBUG,"ONETOMANY: "+command);
1161         std::string FullLine = ":" + prefix + " " + command;
1162         for (unsigned int x = 0; x < params.size(); x++)
1163         {
1164                 FullLine = FullLine + " " + params[x];
1165         }
1166         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1167         {
1168                 TreeServer* Route = TreeRoot->GetChild(x);
1169                 if (Route->GetSocket())
1170                 {
1171                         TreeSocket* Sock = Route->GetSocket();
1172                         Sock->WriteLine(FullLine);
1173                 }
1174         }
1175         return true;
1176 }
1177
1178 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> params, std::string target)
1179 {
1180         TreeServer* Route = BestRouteTo(target);
1181         if (Route)
1182         {
1183                 std::string FullLine = ":" + prefix + " " + command;
1184                 for (unsigned int x = 0; x < params.size(); x++)
1185                 {
1186                         FullLine = FullLine + " " + params[x];
1187                 }
1188                 if (Route->GetSocket())
1189                 {
1190                         TreeSocket* Sock = Route->GetSocket();
1191                         Sock->WriteLine(FullLine);
1192                 }
1193                 return true;
1194         }
1195         else
1196         {
1197                 log(DEBUG,"Could not route message with target %s: %s",target.c_str(),command.c_str());
1198                 return true;
1199         }
1200 }
1201
1202
1203 class ModuleSpanningTree : public Module
1204 {
1205         std::vector<TreeSocket*> Bindings;
1206         int line;
1207
1208  public:
1209
1210         void ReadConfiguration(bool rebind)
1211         {
1212                 if (rebind)
1213                 {
1214                         for (int j =0; j < Conf->Enumerate("bind"); j++)
1215                         {
1216                                 std::string Type = Conf->ReadValue("bind","type",j);
1217                                 std::string IP = Conf->ReadValue("bind","address",j);
1218                                 long Port = Conf->ReadInteger("bind","port",j,true);
1219                                 if (Type == "servers")
1220                                 {
1221                                         if (IP == "*")
1222                                         {
1223                                                 IP = "";
1224                                         }
1225                                         TreeSocket* listener = new TreeSocket(IP.c_str(),Port,true,10);
1226                                         if (listener->GetState() == I_LISTENING)
1227                                         {
1228                                                 Srv->AddSocket(listener);
1229                                                 Bindings.push_back(listener);
1230                                         }
1231                                         else
1232                                         {
1233                                                 log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
1234                                                 listener->Close();
1235                                                 delete listener;
1236                                         }
1237                                 }
1238                         }
1239                 }
1240                 LinkBlocks.clear();
1241                 for (int j =0; j < Conf->Enumerate("link"); j++)
1242                 {
1243                         Link L;
1244                         L.Name = Conf->ReadValue("link","name",j);
1245                         L.IPAddr = Conf->ReadValue("link","ipaddr",j);
1246                         L.Port = Conf->ReadInteger("link","port",j,true);
1247                         L.SendPass = Conf->ReadValue("link","sendpass",j);
1248                         L.RecvPass = Conf->ReadValue("link","recvpass",j);
1249                         LinkBlocks.push_back(L);
1250                         log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
1251                 }
1252         }
1253
1254         ModuleSpanningTree()
1255         {
1256                 Srv = new Server;
1257                 Conf = new ConfigReader;
1258                 Bindings.clear();
1259
1260                 // Create the root of the tree
1261                 TreeRoot = new TreeServer(Srv->GetServerName(),Srv->GetServerDescription());
1262
1263                 ReadConfiguration(true);
1264         }
1265
1266         void ShowLinks(TreeServer* Current, userrec* user, int hops)
1267         {
1268                 std::string Parent = TreeRoot->GetName();
1269                 if (Current->GetParent())
1270                 {
1271                         Parent = Current->GetParent()->GetName();
1272                 }
1273                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1274                 {
1275                         ShowLinks(Current->GetChild(q),user,hops+1);
1276                 }
1277                 WriteServ(user->fd,"364 %s %s %s :%d %s",user->nick,Current->GetName().c_str(),Parent.c_str(),hops,Current->GetDesc().c_str());
1278         }
1279
1280         void HandleLinks(char** parameters, int pcnt, userrec* user)
1281         {
1282                 ShowLinks(TreeRoot,user,0);
1283                 WriteServ(user->fd,"365 %s * :End of /LINKS list.",user->nick);
1284                 return;
1285         }
1286
1287         void HandleLusers(char** parameters, int pcnt, userrec* user)
1288         {
1289                 return;
1290         }
1291
1292         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
1293
1294         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80])
1295         {
1296                 if (line < 128)
1297                 {
1298                         for (int t = 0; t < depth; t++)
1299                         {
1300                                 matrix[line][t] = ' ';
1301                         }
1302                         strlcpy(&matrix[line][depth],Current->GetName().c_str(),80);
1303                         line++;
1304                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
1305                         {
1306                                 ShowMap(Current->GetChild(q),user,depth+2,matrix);
1307                         }
1308                 }
1309         }
1310
1311         // Ok, prepare to be confused.
1312         // After much mulling over how to approach this, it struck me that
1313         // the 'usual' way of doing a /MAP isnt the best way. Instead of
1314         // keeping track of a ton of ascii characters, and line by line
1315         // under recursion working out where to place them using multiplications
1316         // and divisons, we instead render the map onto a backplane of characters
1317         // (a character matrix), then draw the branches as a series of "L" shapes
1318         // from the nodes. This is not only friendlier on CPU it uses less stack.
1319
1320         void HandleMap(char** parameters, int pcnt, userrec* user)
1321         {
1322                 // This array represents a virtual screen which we will
1323                 // "scratch" draw to, as the console device of an irc
1324                 // client does not provide for a proper terminal.
1325                 char matrix[128][80];
1326                 for (unsigned int t = 0; t < 128; t++)
1327                 {
1328                         matrix[t][0] = '\0';
1329                 }
1330                 line = 0;
1331                 // The only recursive bit is called here.
1332                 ShowMap(TreeRoot,user,0,matrix);
1333                 // Process each line one by one. The algorithm has a limit of
1334                 // 128 servers (which is far more than a spanning tree should have
1335                 // anyway, so we're ok). This limit can be raised simply by making
1336                 // the character matrix deeper, 128 rows taking 10k of memory.
1337                 for (int l = 1; l < line; l++)
1338                 {
1339                         // scan across the line looking for the start of the
1340                         // servername (the recursive part of the algorithm has placed
1341                         // the servers at indented positions depending on what they
1342                         // are related to)
1343                         int first_nonspace = 0;
1344                         while (matrix[l][first_nonspace] == ' ')
1345                         {
1346                                 first_nonspace++;
1347                         }
1348                         first_nonspace--;
1349                         // Draw the `- (corner) section: this may be overwritten by
1350                         // another L shape passing along the same vertical pane, becoming
1351                         // a |- (branch) section instead.
1352                         matrix[l][first_nonspace] = '-';
1353                         matrix[l][first_nonspace-1] = '`';
1354                         int l2 = l - 1;
1355                         // Draw upwards until we hit the parent server, causing possibly
1356                         // other corners (`-) to become branches (|-)
1357                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
1358                         {
1359                                 matrix[l2][first_nonspace-1] = '|';
1360                                 l2--;
1361                         }
1362                 }
1363                 // dump the whole lot to the user. This is the easy bit, honest.
1364                 for (int t = 0; t < line; t++)
1365                 {
1366                         WriteServ(user->fd,"006 %s :%s",user->nick,&matrix[t][0]);
1367                 }
1368                 WriteServ(user->fd,"007 %s :End of /MAP",user->nick);
1369                 return;
1370         }
1371
1372         int HandleSquit(char** parameters, int pcnt, userrec* user)
1373         {
1374                 return 1;
1375         }
1376
1377         int HandleConnect(char** parameters, int pcnt, userrec* user)
1378         {
1379                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
1380                 {
1381                         if (Srv->MatchText(x->Name.c_str(),parameters[0]))
1382                         {
1383                                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: Connecting to server: %s (%s:%d)",user->nick,x->Name.c_str(),x->IPAddr.c_str(),x->Port);
1384                                 TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name);
1385                                 Srv->AddSocket(newsocket);
1386                                 return 1;
1387                         }
1388                 }
1389                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: No matching server could be found in the config file.",user->nick);
1390                 return 1;
1391         }
1392
1393         virtual int OnPreCommand(std::string command, char **parameters, int pcnt, userrec *user)
1394         {
1395                 if (command == "CONNECT")
1396                 {
1397                         return this->HandleConnect(parameters,pcnt,user);
1398                 }
1399                 else if (command == "SQUIT")
1400                 {
1401                         return this->HandleSquit(parameters,pcnt,user);
1402                 }
1403                 else if (command == "MAP")
1404                 {
1405                         this->HandleMap(parameters,pcnt,user);
1406                         return 1;
1407                 }
1408                 else if (command == "LUSERS")
1409                 {
1410                         this->HandleLusers(parameters,pcnt,user);
1411                         return 1;
1412                 }
1413                 else if (command == "LINKS")
1414                 {
1415                         this->HandleLinks(parameters,pcnt,user);
1416                         return 1;
1417                 }
1418                 return 0;
1419         }
1420
1421         virtual void OnGetServerDescription(std::string servername,std::string &description)
1422         {
1423                 TreeServer* s = FindServer(servername);
1424                 if (s)
1425                 {
1426                         description = s->GetDesc();
1427                 }
1428         }
1429
1430         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
1431         {
1432                 if (std::string(source->server) == Srv->GetServerName())
1433                 {
1434                         std::deque<std::string> params;
1435                         params.push_back(dest->nick);
1436                         params.push_back(channel->name);
1437                         DoOneToMany(source->nick,"INVITE",params);
1438                 }
1439         }
1440
1441         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, std::string topic)
1442         {
1443                 std::deque<std::string> params;
1444                 params.push_back(chan->name);
1445                 params.push_back(":"+topic);
1446                 DoOneToMany(user->nick,"TOPIC",params);
1447         }
1448
1449         virtual void OnUserNotice(userrec* user, void* dest, int target_type, std::string text)
1450         {
1451                 if (target_type == TYPE_USER)
1452                 {
1453                         userrec* d = (userrec*)dest;
1454                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
1455                         {
1456                                 std::deque<std::string> params;
1457                                 params.clear();
1458                                 params.push_back(d->nick);
1459                                 params.push_back(":"+text);
1460                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
1461                         }
1462                 }
1463                 else
1464                 {
1465                         if (std::string(user->server) == Srv->GetServerName())
1466                         {
1467                                 chanrec *c = (chanrec*)dest;
1468                                 std::deque<std::string> params;
1469                                 params.push_back(c->name);
1470                                 params.push_back(":"+text);
1471                                 DoOneToMany(user->nick,"NOTICE",params);
1472                         }
1473                 }
1474         }
1475
1476         virtual void OnUserMessage(userrec* user, void* dest, int target_type, std::string text)
1477         {
1478                 if (target_type == TYPE_USER)
1479                 {
1480                         // route private messages which are targetted at clients only to the server
1481                         // which needs to receive them
1482                         userrec* d = (userrec*)dest;
1483                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
1484                         {
1485                                 std::deque<std::string> params;
1486                                 params.clear();
1487                                 params.push_back(d->nick);
1488                                 params.push_back(":"+text);
1489                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
1490                         }
1491                 }
1492                 else
1493                 {
1494                         if (std::string(user->server) == Srv->GetServerName())
1495                         {
1496                                 chanrec *c = (chanrec*)dest;
1497                                 std::deque<std::string> params;
1498                                 params.push_back(c->name);
1499                                 params.push_back(":"+text);
1500                                 DoOneToMany(user->nick,"PRIVMSG",params);
1501                         }
1502                 }
1503         }
1504
1505         virtual void OnUserJoin(userrec* user, chanrec* channel)
1506         {
1507                 // Only do this for local users
1508                 if (std::string(user->server) == Srv->GetServerName())
1509                 {
1510                         log(DEBUG,"**** User on %s JOINS %s",user->server,channel->name);
1511                         std::deque<std::string> params;
1512                         params.clear();
1513                         params.push_back(channel->name);
1514                         if (*channel->key)
1515                         {
1516                                 log(DEBUG,"**** With key %s",channel->key);
1517                                 // if the channel has a key, force the join by emulating the key.
1518                                 params.push_back(channel->key);
1519                         }
1520                         DoOneToMany(user->nick,"JOIN",params);
1521                 }
1522         }
1523
1524         virtual void OnUserPart(userrec* user, chanrec* channel)
1525         {
1526                 if (std::string(user->server) == Srv->GetServerName())
1527                 {
1528                         log(DEBUG,"**** User on %s PARTS %s",user->server,channel->name);
1529                         std::deque<std::string> params;
1530                         params.clear();
1531                         params.push_back(channel->name);
1532                         DoOneToMany(user->nick,"PART",params);
1533                 }
1534         }
1535
1536         virtual void OnUserConnect(userrec* user)
1537         {
1538                 char agestr[MAXBUF];
1539                 if (std::string(user->server) == Srv->GetServerName())
1540                 {
1541                         log(DEBUG,"**** User on %s CONNECTS: %s",user->server,user->nick);
1542                         std::deque<std::string> params;
1543                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
1544                         params.clear();
1545                         params.push_back(agestr);
1546                         params.push_back(user->nick);
1547                         params.push_back(user->host);
1548                         params.push_back(user->dhost);
1549                         params.push_back(user->ident);
1550                         params.push_back("+"+std::string(user->modes));
1551                         params.push_back(user->ip);
1552                         params.push_back(":"+std::string(user->fullname));
1553                         DoOneToMany(Srv->GetServerName(),"NICK",params);
1554                 }
1555         }
1556
1557         virtual void OnUserQuit(userrec* user, std::string reason)
1558         {
1559                 if (std::string(user->server) == Srv->GetServerName())
1560                 {
1561                         log(DEBUG,"**** User on %s QUITS: %s",user->server,user->nick);
1562                         std::deque<std::string> params;
1563                         params.push_back(":"+reason);
1564                         DoOneToMany(user->nick,"QUIT",params);
1565                 }
1566         }
1567
1568         virtual void OnUserPostNick(userrec* user, std::string oldnick)
1569         {
1570                 if (std::string(user->server) == Srv->GetServerName())
1571                 {
1572                         log(DEBUG,"**** User on %s changes NICK: %s",user->server,user->nick);
1573                         std::deque<std::string> params;
1574                         params.push_back(user->nick);
1575                         DoOneToMany(oldnick,"NICK",params);
1576                 }
1577         }
1578
1579         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, std::string reason)
1580         {
1581                 if (std::string(source->server) == Srv->GetServerName())
1582                 {
1583                         log(DEBUG,"**** User on %s KICKs: %s %s",source->server,source->nick,user->nick);
1584                         std::deque<std::string> params;
1585                         params.push_back(chan->name);
1586                         params.push_back(user->nick);
1587                         params.push_back(":"+reason);
1588                         DoOneToMany(source->nick,"KICK",params);
1589                 }
1590         }
1591
1592         virtual void OnRemoteKill(userrec* source, userrec* dest, std::string reason)
1593         {
1594                 std::deque<std::string> params;
1595                 params.push_back(dest->nick);
1596                 params.push_back(":"+reason);
1597                 DoOneToMany(source->nick,"KILL",params);
1598         }
1599
1600         virtual void OnRehash(std::string parameter)
1601         {
1602                 if (parameter != "")
1603                 {
1604                         std::deque<std::string> params;
1605                         params.push_back(parameter);
1606                         DoOneToMany(Srv->GetServerName(),"REHASH",params);
1607                         // check for self
1608                         if (Srv->MatchText(Srv->GetServerName(),parameter))
1609                         {
1610                                 Srv->SendOpers("*** Remote rehash initiated from server \002"+Srv->GetServerName()+"\002.");
1611                                 Srv->RehashServer();
1612                         }
1613                 }
1614                 this->ReadConfiguration(false);
1615         }
1616
1617         // note: the protocol does not allow direct umode +o except
1618         // via NICK with 8 params. sending OPERTYPE infers +o modechange
1619         // locally.
1620         virtual void OnOper(userrec* user, std::string opertype)
1621         {
1622                 if (std::string(user->server) == Srv->GetServerName())
1623                 {
1624                         std::deque<std::string> params;
1625                         params.push_back(opertype);
1626                         DoOneToMany(user->nick,"OPERTYPE",params);
1627                 }
1628         }
1629
1630         virtual void OnMode(userrec* user, void* dest, int target_type, std::string text)
1631         {
1632                 log(DEBUG,"*** ONMODE TRIGGER");
1633                 if (std::string(user->server) == Srv->GetServerName())
1634                 {
1635                         log(DEBUG,"*** LOCAL");
1636                         if (target_type == TYPE_USER)
1637                         {
1638                                 userrec* u = (userrec*)dest;
1639                                 std::deque<std::string> params;
1640                                 params.push_back(u->nick);
1641                                 params.push_back(text);
1642                                 DoOneToMany(user->nick,"MODE",params);
1643                         }
1644                         else
1645                         {
1646                                 chanrec* c = (chanrec*)dest;
1647                                 std::deque<std::string> params;
1648                                 params.push_back(c->name);
1649                                 params.push_back(text);
1650                                 DoOneToMany(user->nick,"MODE",params);
1651                         }
1652                 }
1653         }
1654
1655         virtual void ProtoSendMode(void* opaque, int target_type, void* target, std::string modeline)
1656         {
1657                 TreeSocket* s = (TreeSocket*)opaque;
1658                 if (target)
1659                 {
1660                         if (target_type == TYPE_USER)
1661                         {
1662                                 userrec* u = (userrec*)target;
1663                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+u->nick+" "+modeline);
1664                         }
1665                         else
1666                         {
1667                                 chanrec* c = (chanrec*)target;
1668                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+modeline);
1669                         }
1670                 }
1671         }
1672
1673         virtual ~ModuleSpanningTree()
1674         {
1675                 delete Srv;
1676         }
1677
1678         virtual Version GetVersion()
1679         {
1680                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
1681         }
1682 };
1683
1684
1685 class ModuleSpanningTreeFactory : public ModuleFactory
1686 {
1687  public:
1688         ModuleSpanningTreeFactory()
1689         {
1690         }
1691
1692         ~ModuleSpanningTreeFactory()
1693         {
1694         }
1695
1696         virtual Module * CreateModule()
1697         {
1698                 TreeProtocolModule = new ModuleSpanningTree;
1699                 return TreeProtocolModule;
1700         }
1701
1702 };
1703
1704
1705 extern "C" void * init_module( void )
1706 {
1707         return new ModuleSpanningTreeFactory;
1708 }
1709