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 void ReadConfiguration(bool rebind);
  68
  69 class TreeServer
  70 {
  71         TreeServer* Parent;
  72         std::vector<TreeServer*> Children;
  73         std::string ServerName;
  74         std::string ServerDesc;
  75         std::string VersionString;
  76         int UserCount;
  77         int OperCount;
  78         TreeSocket* Socket;     // for directly connected servers this points at the socket object
  79
  80  public:
  81
  82         TreeServer()
  83         {
  84                 Parent = NULL;
  85                 ServerName = "";
  86                 ServerDesc = "";
  87                 VersionString = "";
  88                 UserCount = OperCount = 0;
  89         }
  90
  91         TreeServer(std::string Name, std::string Desc) : ServerName(Name), ServerDesc(Desc)
  92         {
  93                 Parent = NULL;
  94                 VersionString = "";
  95                 UserCount = OperCount = 0;
  96         }
  97
  98         TreeServer(std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock) : Parent(Above), ServerName(Name), ServerDesc(Desc), Socket(Sock)
  99         {
 100                 VersionString = "";
 101                 UserCount = OperCount = 0;
 102         }
 103
 104         std::string GetName()
 105         {
 106                 return this->ServerName;
 107         }
 108
 109         std::string GetDesc()
 110         {
 111                 return this->ServerDesc;
 112         }
 113
 114         std::string GetVersion()
 115         {
 116                 return this->VersionString;
 117         }
 118
 119         int GetUserCount()
 120         {
 121                 return this->UserCount;
 122         }
 123
 124         int GetOperCount()
 125         {
 126                 return this->OperCount;
 127         }
 128
 129         TreeSocket* GetSocket()
 130         {
 131                 return this->Socket;
 132         }
 133
 134         TreeServer* GetParent()
 135         {
 136                 return this->Parent;
 137         }
 138
 139         unsigned int ChildCount()
 140         {
 141                 return Children.size();
 142         }
 143
 144         TreeServer* GetChild(unsigned int n)
 145         {
 146                 if (n < Children.size())
 147                 {
 148                         return Children[n];
 149                 }
 150                 else
 151                 {
 152                         return NULL;
 153                 }
 154         }
 155
 156         void AddChild(TreeServer* Child)
 157         {
 158                 Children.push_back(Child);
 159         }
 160
 161         bool DelChild(TreeServer* Child)
 162         {
 163                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 164                 {
 165                         if (*a == Child)
 166                         {
 167                                 Children.erase(a);
 168                                 return true;
 169                         }
 170                 }
 171                 return false;
 172         }
 173
 174         // removes child nodes of this node, and of that node, etc etc
 175         bool Tidy()
 176         {
 177                 bool stillchildren = true;
 178                 while (stillchildren)
 179                 {
 180                         stillchildren = false;
 181                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 182                         {
 183                                 TreeServer* s = (TreeServer*)*a;
 184                                 s->Tidy();
 185                                 Children.erase(a);
 186                                 delete s;
 187                                 stillchildren = true;
 188                                 break;
 189                         }
 190                 }
 191                 return true;
 192         }
 193 };
 194
 195 class Link
 196 {
 197  public:
 198          std::string Name;
 199          std::string IPAddr;
 200          int Port;
 201          std::string SendPass;
 202          std::string RecvPass;
 203 };
 204
 205 /* $ModDesc: Povides a spanning tree server link protocol */
 206
 207 Server *Srv;
 208 ConfigReader *Conf;
 209 TreeServer *TreeRoot;
 210 std::vector<Link> LinkBlocks;
 211
 212 TreeServer* RouteEnumerate(TreeServer* Current, std::string ServerName)
 213 {
 214         if (Current->GetName() == ServerName)
 215                 return Current;
 216         for (unsigned int q = 0; q < Current->ChildCount(); q++)
 217         {
 218                 TreeServer* found = RouteEnumerate(Current->GetChild(q),ServerName);
 219                 if (found)
 220                 {
 221                         return found;
 222                 }
 223         }
 224         return NULL;
 225 }
 226
 227 // Returns the locally connected server we must route a
 228 // message through to reach server 'ServerName'. This
 229 // only applies to one-to-one and not one-to-many routing.
 230 TreeServer* BestRouteTo(std::string ServerName)
 231 {
 232         log(DEBUG,"Finding best route to %s",ServerName.c_str());
 233         if (ServerName.c_str() == TreeRoot->GetName())
 234         {
 235                 log(DEBUG,"Cant route to myself!!!");
 236                 return NULL;
 237         }
 238         // first, find the server by recursively walking the tree
 239         TreeServer* Found = RouteEnumerate(TreeRoot,ServerName);
 240         // did we find it? If not, they did something wrong, abort.
 241         if (!Found)
 242         {
 243                 log(DEBUG,"Failed to find %s by walking tree!",ServerName.c_str());
 244                 return NULL;
 245         }
 246         else
 247         {
 248                 // The server exists, follow its parent nodes until
 249                 // the parent of the current is 'TreeRoot', we know
 250                 // then that this is a directly-connected server.
 251                 while ((Found) && (Found->GetParent() != TreeRoot))
 252                 {
 253                         Found = Found->GetParent();
 254                 }
 255                 log(DEBUG,"Route to %s is via %s",ServerName.c_str(),Found->GetName().c_str());
 256                 return Found;
 257         }
 258 }
 259
 260 bool LookForServer(TreeServer* Current, std::string ServerName)
 261 {
 262         if (ServerName == Current->GetName())
 263                 return true;
 264         for (unsigned int q = 0; q < Current->ChildCount(); q++)
 265         {
 266                 if (LookForServer(Current->GetChild(q),ServerName))
 267                         return true;
 268         }
 269         return false;
 270 }
 271
 272 TreeServer* Found;
 273
 274 void RFindServer(TreeServer* Current, std::string ServerName)
 275 {
 276         if ((ServerName == Current->GetName()) && (!Found))
 277         {
 278                 Found = Current;
 279                 log(DEBUG,"Found server %s desc %s",Current->GetName().c_str(),Current->GetDesc().c_str());
 280                 return;
 281         }
 282         if (!Found)
 283         {
 284                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 285                 {
 286                         if (!Found)
 287                                 RFindServer(Current->GetChild(q),ServerName);
 288                 }
 289         }
 290         return;
 291 }
 292
 293 TreeServer* FindServer(std::string ServerName)
 294 {
 295         Found = NULL;
 296         RFindServer(TreeRoot,ServerName);
 297         return Found;
 298 }
 299
 300 bool IsServer(std::string ServerName)
 301 {
 302         return LookForServer(TreeRoot,ServerName);
 303 }
 304
 305 class TreeSocket : public InspSocket
 306 {
 307         std::string myhost;
 308         std::string in_buffer;
 309         ServerState LinkState;
 310         std::string InboundServerName;
 311         std::string InboundDescription;
 312         int num_lost_users;
 313         int num_lost_servers;
 314
 315  public:
 316
 317         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime)
 318                 : InspSocket(host, port, listening, maxtime)
 319         {
 320                 Srv->Log(DEBUG,"Create new listening");
 321                 myhost = host;
 322                 this->LinkState = LISTENER;
 323         }
 324
 325         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 326                 : InspSocket(host, port, listening, maxtime)
 327         {
 328                 Srv->Log(DEBUG,"Create new outbound");
 329                 myhost = ServerName;
 330                 this->LinkState = CONNECTING;
 331         }
 332
 333         TreeSocket(int newfd, char* ip)
 334                 : InspSocket(newfd, ip)
 335         {
 336                 Srv->Log(DEBUG,"Associate new inbound");
 337                 this->LinkState = WAIT_AUTH_1;
 338         }
 339
 340         virtual bool OnConnected()
 341         {
 342                 if (this->LinkState == CONNECTING)
 343                 {
 344                         Srv->SendOpers("*** Connection to "+myhost+"["+this->GetIP()+"] established.");
 345                         // we should send our details here.
 346                         // if the other side is satisfied, they send theirs.
 347                         // we do not need to change state here.
 348                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 349                         {
 350                                 if (x->Name == this->myhost)
 351                                 {
 352                                         // found who we're supposed to be connecting to, send the neccessary gubbins.
 353                                         this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 354                                         return true;
 355                                 }
 356                         }
 357                 }
 358                 log(DEBUG,"Outbound connection ERROR: Could not find the right link block!");
 359                 return true;
 360         }
 361
 362         virtual void OnError(InspSocketError e)
 363         {
 364         }
 365
 366         virtual int OnDisconnect()
 367         {
 368                 return true;
 369         }
 370
 371         // recursively send the server tree with distances as hops
 372         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 373         {
 374                 char command[1024];
 375                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 376                 {
 377                         TreeServer* recursive_server = Current->GetChild(q);
 378                         if (recursive_server != s)
 379                         {
 380                                 // :source.server SERVER server.name hops :Description
 381                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 382                                 this->WriteLine(command);
 383                                 // down to next level
 384                                 this->SendServers(recursive_server, s, hops+1);
 385                         }
 386                 }
 387         }
 388
 389         void SquitServer(TreeServer* Current)
 390         {
 391                 // recursively squit the servers attached to 'Current'
 392                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 393                 {
 394                         TreeServer* recursive_server = Current->GetChild(q);
 395                         this->SquitServer(recursive_server);
 396                 }
 397                 // Now we've whacked the kids, whack self
 398                 log(DEBUG,"Deleted %s",Current->GetName().c_str());
 399                 num_lost_servers++;
 400                 bool quittingpeople = true;
 401                 while (quittingpeople)
 402                 {
 403                         quittingpeople = false;
 404                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 405                         {
 406                                 if (!strcasecmp(u->second->server,Current->GetName().c_str()))
 407                                 {
 408                                         log(DEBUG,"Quitting user %s of server %s",u->second->nick,u->second->server);
 409                                         Srv->QuitUser(u->second,Current->GetName()+" "+std::string(Srv->GetServerName()));
 410                                         num_lost_users++;
 411                                         quittingpeople = true;
 412                                         break;
 413                                 }
 414                         }
 415                 }
 416         }
 417
 418         void Squit(TreeServer* Current,std::string reason)
 419         {
 420                 if (Current)
 421                 {
 422                         std::deque<std::string> params;
 423                         params.push_back(Current->GetName());
 424                         params.push_back(":"+reason);
 425                         DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
 426                         if (Current->GetParent() == TreeRoot)
 427                         {
 428                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
 429                         }
 430                         else
 431                         {
 432                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
 433                         }
 434                         num_lost_servers = 0;
 435                         num_lost_users = 0;
 436                         SquitServer(Current);
 437                         Current->Tidy();
 438                         Current->GetParent()->DelChild(Current);
 439                         delete Current;
 440                         WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
 441                 }
 442                 else
 443                 {
 444                         log(DEBUG,"Squit from unknown server");
 445                 }
 446         }
 447
 448         bool ForceMode(std::string source, std::deque<std::string> params)
 449         {
 450                 userrec* who = new userrec;
 451                 who->fd = FD_MAGIC_NUMBER;
 452                 if (params.size() < 2)
 453                         return true;
 454                 char* modelist[255];
 455                 for (unsigned int q = 0; q < params.size(); q++)
 456                 {
 457                         modelist[q] = (char*)params[q].c_str();
 458                 }
 459                 Srv->SendMode(modelist,params.size(),who);
 460                 DoOneToAllButSender(source,"FMODE",params,source);
 461                 delete who;
 462                 return true;
 463         }
 464
 465         bool ForceTopic(std::string source, std::deque<std::string> params)
 466         {
 467                 // FTOPIC %s %lu %s :%s
 468                 if (params.size() != 4)
 469                         return true;
 470                 std::string channel = params[0];
 471                 time_t ts = atoi(params[1].c_str());
 472                 std::string setby = params[2];
 473                 std::string topic = params[3];
 474
 475                 chanrec* c = Srv->FindChannel(channel);
 476                 if (c)
 477                 {
 478                         if ((ts >= c->topicset) || (!*c->topic))
 479                         {
 480                                 strlcpy(c->topic,topic.c_str(),MAXTOPIC);
 481                                 strlcpy(c->setby,setby.c_str(),NICKMAX);
 482                                 c->topicset = ts;
 483                                 WriteChannelWithServ((char*)source.c_str(), c, "TOPIC %s :%s", c->name, c->topic);
 484                         }
 485
 486                 }
 487
 488                 // all done, send it on its way
 489                 params[3] = ":" + params[3];
 490                 DoOneToAllButSender(source,"FTOPIC",params,source);
 491
 492                 return true;
 493         }
 494
 495         bool ForceJoin(std::string source, std::deque<std::string> params)
 496         {
 497                 if (params.size() < 1)
 498                         return true;
 499                 for (unsigned int channelnum = 0; channelnum < params.size(); channelnum++)
 500                 {
 501                         // process one channel at a time, applying modes.
 502                         char* channel = (char*)params[channelnum].c_str();
 503                         char permissions = *channel;
 504                         char* mode = NULL;
 505                         switch (permissions)
 506                         {
 507                                 case '@':
 508                                         channel++;
 509                                         mode = "+o";
 510                                 break;
 511                                 case '%':
 512                                         channel++;
 513                                         mode = "+h";
 514                                 break;
 515                                 case '+':
 516                                         channel++;
 517                                         mode = "+v";
 518                                 break;
 519                         }
 520                         userrec* who = Srv->FindNick(source);
 521                         if (who)
 522                         {
 523                                 char* key = "";
 524                                 chanrec* chan = Srv->FindChannel(channel);
 525                                 if ((chan) && (*chan->key))
 526                                 {
 527                                         key = chan->key;
 528                                 }
 529                                 Srv->JoinUserToChannel(who,channel,key);
 530                                 if (mode)
 531                                 {
 532                                         char* modelist[3];
 533                                         modelist[0] = channel;
 534                                         modelist[1] = mode;
 535                                         modelist[2] = who->nick;
 536                                         Srv->SendMode(modelist,3,who);
 537                                 }
 538                                 DoOneToAllButSender(source,"FJOIN",params,who->server);
 539                         }
 540                 }
 541                 return true;
 542         }
 543
 544         bool IntroduceClient(std::string source, std::deque<std::string> params)
 545         {
 546                 if (params.size() < 8)
 547                         return true;
 548                 // NICK age nick host dhost ident +modes ip :gecos
 549                 //       0   1    2    3      4     5    6   7
 550                 std::string nick = params[1];
 551                 std::string host = params[2];
 552                 std::string dhost = params[3];
 553                 std::string ident = params[4];
 554                 time_t age = atoi(params[0].c_str());
 555                 std::string modes = params[5];
 556                 if (*(modes.c_str()) == '+')
 557                 {
 558                         char* m = (char*)modes.c_str();
 559                         m++;
 560                         modes = m;
 561                 }
 562                 std::string ip = params[6];
 563                 std::string gecos = params[7];
 564                 char* tempnick = (char*)nick.c_str();
 565                 log(DEBUG,"Introduce client %s!%s@%s",tempnick,ident.c_str(),host.c_str());
 566
 567                 user_hash::iterator iter;
 568                 iter = clientlist.find(tempnick);
 569                 if (iter != clientlist.end())
 570                 {
 571                         // nick collision
 572                         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);
 573                         this->WriteLine(":"+Srv->GetServerName()+" KILL "+tempnick+" :Nickname collision");
 574                         return true;
 575                 }
 576
 577                 clientlist[tempnick] = new userrec();
 578                 clientlist[tempnick]->fd = FD_MAGIC_NUMBER;
 579                 strlcpy(clientlist[tempnick]->nick, tempnick,NICKMAX);
 580                 strlcpy(clientlist[tempnick]->host, host.c_str(),160);
 581                 strlcpy(clientlist[tempnick]->dhost, dhost.c_str(),160);
 582                 clientlist[tempnick]->server = (char*)FindServerNamePtr(source.c_str());
 583                 strlcpy(clientlist[tempnick]->ident, ident.c_str(),IDENTMAX);
 584                 strlcpy(clientlist[tempnick]->fullname, gecos.c_str(),MAXGECOS);
 585                 clientlist[tempnick]->registered = 7;
 586                 clientlist[tempnick]->signon = age;
 587                 strlcpy(clientlist[tempnick]->ip,ip.c_str(),16);
 588                 for (int i = 0; i < MAXCHANS; i++)
 589                 {
 590                         clientlist[tempnick]->chans[i].channel = NULL;
 591                         clientlist[tempnick]->chans[i].uc_modes = 0;
 592                 }
 593                 params[7] = ":" + params[7];
 594                 DoOneToAllButSender(source,"NICK",params,source);
 595                 return true;
 596         }
 597
 598         void SendChannelModes(TreeServer* Current)
 599         {
 600                 char data[MAXBUF];
 601                 for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 602                 {
 603                         snprintf(data,MAXBUF,":%s FMODE %s +%s",Srv->GetServerName().c_str(),c->second->name,chanmodes(c->second));
 604                         this->WriteLine(data);
 605                         if (*c->second->topic)
 606                         {
 607                                 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);
 608                                 this->WriteLine(data);
 609                         }
 610                         for (BanList::iterator b = c->second->bans.begin(); b != c->second->bans.end(); b++)
 611                         {
 612                                 snprintf(data,MAXBUF,":%s FMODE %s +b %s",Srv->GetServerName().c_str(),c->second->name,b->data);
 613                                 this->WriteLine(data);
 614                         }
 615                         FOREACH_MOD OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this);
 616                 }
 617         }
 618
 619         // send all users and their channels
 620         void SendUsers(TreeServer* Current)
 621         {
 622                 char data[MAXBUF];
 623                 for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 624                 {
 625                         if (u->second->registered == 7)
 626                         {
 627                                 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);
 628                                 this->WriteLine(data);
 629                                 if (strchr(u->second->modes,'o'))
 630                                 {
 631                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
 632                                 }
 633                                 char* chl = chlist(u->second,u->second);
 634                                 if (*chl)
 635                                 {
 636                                         this->WriteLine(":"+std::string(u->second->nick)+" FJOIN "+std::string(chl));
 637                                 }
 638                                 FOREACH_MOD OnSyncUser(u->second,(Module*)TreeProtocolModule,(void*)this);
 639                         }
 640                 }
 641         }
 642
 643         void DoBurst(TreeServer* s)
 644         {
 645                 log(DEBUG,"Beginning network burst");
 646                 Srv->SendOpers("*** Bursting to "+s->GetName()+".");
 647                 this->WriteLine("BURST");
 648                 // Send server tree
 649                 this->SendServers(TreeRoot,s,1);
 650                 // Send users and their channels
 651                 this->SendUsers(s);
 652                 // TODO: Send everything else (channel modes etc)
 653                 this->SendChannelModes(s);
 654                 this->WriteLine("ENDBURST");
 655         }
 656
 657         virtual bool OnDataReady()
 658         {
 659                 char* data = this->Read();
 660                 if (data)
 661                 {
 662                         this->in_buffer += data;
 663                         while (in_buffer.find("\n") != std::string::npos)
 664                         {
 665                                 char* line = (char*)in_buffer.c_str();
 666                                 std::string ret = "";
 667                                 while ((*line != '\n') && (strlen(line)))
 668                                 {
 669                                         ret = ret + *line;
 670                                         line++;
 671                                 }
 672                                 if ((*line == '\n') || (*line == '\r'))
 673                                         line++;
 674                                 in_buffer = line;
 675                                 if (!this->ProcessLine(ret))
 676                                 {
 677                                         return false;
 678                                 }
 679                         }
 680                 }
 681                 return (data != NULL);
 682         }
 683
 684         int WriteLine(std::string line)
 685         {
 686                 return this->Write(line + "\r\n");
 687         }
 688
 689         bool Error(std::deque<std::string> params)
 690         {
 691                 if (params.size() < 1)
 692                         return false;
 693                 std::string Errmsg = params[0];
 694                 std::string SName = myhost;
 695                 if (InboundServerName != "")
 696                 {
 697                         SName = InboundServerName;
 698                 }
 699                 Srv->SendOpers("*** ERROR from "+SName+": "+Errmsg);
 700                 // we will return false to cause the socket to close.
 701                 return false;
 702         }
 703
 704         bool OperType(std::string prefix, std::deque<std::string> params)
 705         {
 706                 if (params.size() != 1)
 707                         return true;
 708                 std::string opertype = params[0];
 709                 userrec* u = Srv->FindNick(prefix);
 710                 if (u)
 711                 {
 712                         strlcpy(u->oper,opertype.c_str(),NICKMAX);
 713                         if (!strchr(u->modes,'o'))
 714                         {
 715                                 strcat(u->modes,"o");
 716                         }
 717                         DoOneToAllButSender(u->server,"OPERTYPE",params,u->server);
 718                 }
 719                 return true;
 720         }
 721
 722         bool RemoteRehash(std::string prefix, std::deque<std::string> params)
 723         {
 724                 if (params.size() < 1)
 725                         return true;
 726                 std::string servermask = params[0];
 727                 if (Srv->MatchText(Srv->GetServerName(),servermask))
 728                 {
 729                         Srv->SendOpers("*** Remote rehash initiated from server \002"+prefix+"\002.");
 730                         Srv->RehashServer();
 731                         ReadConfiguration(false);
 732                 }
 733                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
 734                 return true;
 735         }
 736
 737         bool RemoteKill(std::string prefix, std::deque<std::string> params)
 738         {
 739                 if (params.size() != 2)
 740                         return true;
 741                 std::string nick = params[0];
 742                 std::string reason = params[1];
 743                 userrec* u = Srv->FindNick(prefix);
 744                 userrec* who = Srv->FindNick(nick);
 745                 if (who)
 746                 {
 747                         std::string sourceserv = prefix;
 748                         if (u)
 749                         {
 750                                 sourceserv = u->server;
 751                         }
 752                         params[1] = ":" + params[1];
 753                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
 754                         Srv->QuitUser(who,reason);
 755                 }
 756                 return true;
 757         }
 758
 759         bool RemoteServer(std::string prefix, std::deque<std::string> params)
 760         {
 761                 if (params.size() < 4)
 762                         return false;
 763                 std::string servername = params[0];
 764                 std::string password = params[1];
 765                 // hopcount is not used for a remote server, we calculate this ourselves
 766                 std::string description = params[3];
 767                 TreeServer* ParentOfThis = FindServer(prefix);
 768                 if (!ParentOfThis)
 769                 {
 770                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
 771                         return false;
 772                 }
 773                 TreeServer* Node = new TreeServer(servername,description,ParentOfThis,NULL);
 774                 ParentOfThis->AddChild(Node);
 775                 params[3] = ":" + params[3];
 776                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
 777                 Srv->SendOpers("*** Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
 778                 return true;
 779         }
 780
 781         bool Outbound_Reply_Server(std::deque<std::string> params)
 782         {
 783                 if (params.size() < 4)
 784                         return false;
 785                 std::string servername = params[0];
 786                 std::string password = params[1];
 787                 int hops = atoi(params[2].c_str());
 788                 if (hops)
 789                 {
 790                         this->WriteLine("ERROR :Server too far away for authentication");
 791                         return false;
 792                 }
 793                 std::string description = params[3];
 794                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 795                 {
 796                         if ((x->Name == servername) && (x->RecvPass == password))
 797                         {
 798                                 // Begin the sync here. this kickstarts the
 799                                 // other side, waiting in WAIT_AUTH_2 state,
 800                                 // into starting their burst, as it shows
 801                                 // that we're happy.
 802                                 this->LinkState = CONNECTED;
 803                                 // we should add the details of this server now
 804                                 // to the servers tree, as a child of the root
 805                                 // node.
 806                                 TreeServer* Node = new TreeServer(servername,description,TreeRoot,this);
 807                                 TreeRoot->AddChild(Node);
 808                                 params[3] = ":" + params[3];
 809                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,servername);
 810                                 this->DoBurst(Node);
 811                                 return true;
 812                         }
 813                 }
 814                 this->WriteLine("ERROR :Invalid credentials");
 815                 return false;
 816         }
 817
 818         bool Inbound_Server(std::deque<std::string> params)
 819         {
 820                 if (params.size() < 4)
 821                         return false;
 822                 std::string servername = params[0];
 823                 std::string password = params[1];
 824                 int hops = atoi(params[2].c_str());
 825                 if (hops)
 826                 {
 827                         this->WriteLine("ERROR :Server too far away for authentication");
 828                         return false;
 829                 }
 830                 std::string description = params[3];
 831                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 832                 {
 833                         if ((x->Name == servername) && (x->RecvPass == password))
 834                         {
 835                                 Srv->SendOpers("*** Verified incoming server connection from \002"+servername+"\002["+this->GetIP()+"] ("+description+")");
 836                                 this->InboundServerName = servername;
 837                                 this->InboundDescription = description;
 838                                 // this is good. Send our details: Our server name and description and hopcount of 0,
 839                                 // along with the sendpass from this block.
 840                                 this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 841                                 // move to the next state, we are now waiting for THEM.
 842                                 this->LinkState = WAIT_AUTH_2;
 843                                 return true;
 844                         }
 845                 }
 846                 this->WriteLine("ERROR :Invalid credentials");
 847                 return false;
 848         }
 849
 850         std::deque<std::string> Split(std::string line, bool stripcolon)
 851         {
 852                 std::deque<std::string> n;
 853                 std::stringstream s(line);
 854                 std::string param = "";
 855                 n.clear();
 856                 int item = 0;
 857                 while (!s.eof())
 858                 {
 859                         s >> param;
 860                         //if ((param != "") && (param != "\n"))
 861                         //{
 862                                 if ((param.c_str()[0] == ':') && (item))
 863                                 {
 864                                         char* str = (char*)param.c_str();
 865                                         str++;
 866                                         param = str;
 867                                         std::string append;
 868                                         while (!s.eof())
 869                                         {
 870                                                 append = "";
 871                                                 s >> append;
 872                                                 if (append != "")
 873                                                 {
 874                                                         param = param + " " + append;
 875                                                 }
 876                                         }
 877                                 }
 878                                 item++;
 879                                 n.push_back(param);
 880                         //}
 881                 }
 882                 return n;
 883         }
 884
 885         bool ProcessLine(std::string line)
 886         {
 887                 char* l = (char*)line.c_str();
 888                 while ((strlen(l)) && (l[strlen(l)-1] == '\r') || (l[strlen(l)-1] == '\n'))
 889                         l[strlen(l)-1] = '\0';
 890                 line = l;
 891                 if (line == "")
 892                         return true;
 893                 Srv->Log(DEBUG,"inbound-line: '"+line+"'");
 894                 std::deque<std::string> params = this->Split(line,true);
 895                 std::string command = "";
 896                 std::string prefix = "";
 897                 if (((params[0].c_str())[0] == ':') && (params.size() > 1))
 898                 {
 899                         prefix = params[0];
 900                         command = params[1];
 901                         char* pref = (char*)prefix.c_str();
 902                         prefix = ++pref;
 903                         params.pop_front();
 904                         params.pop_front();
 905                 }
 906                 else
 907                 {
 908                         prefix = "";
 909                         command = params[0];
 910                         params.pop_front();
 911                 }
 912
 913                 switch (this->LinkState)
 914                 {
 915                         TreeServer* Node;
 916
 917                         case WAIT_AUTH_1:
 918                                 // Waiting for SERVER command from remote server. Server initiating
 919                                 // the connection sends the first SERVER command, listening server
 920                                 // replies with theirs if its happy, then if the initiator is happy,
 921                                 // it starts to send its net sync, which starts the merge, otherwise
 922                                 // it sends an ERROR.
 923                                 if (command == "SERVER")
 924                                 {
 925                                         return this->Inbound_Server(params);
 926                                 }
 927                                 else if (command == "ERROR")
 928                                 {
 929                                         return this->Error(params);
 930                                 }
 931                         break;
 932                         case WAIT_AUTH_2:
 933                                 // Waiting for start of other side's netmerge to say they liked our
 934                                 // password.
 935                                 if (command == "SERVER")
 936                                 {
 937                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
 938                                         // silently ignore.
 939                                         return true;
 940                                 }
 941                                 else if (command == "BURST")
 942                                 {
 943                                         this->LinkState = CONNECTED;
 944                                         Node = new TreeServer(InboundServerName,InboundDescription,TreeRoot,this);
 945                                         TreeRoot->AddChild(Node);
 946                                         params.clear();
 947                                         params.push_back(InboundServerName);
 948                                         params.push_back("*");
 949                                         params.push_back("1");
 950                                         params.push_back(":"+InboundDescription);
 951                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
 952                                         this->DoBurst(Node);
 953                                 }
 954                                 else if (command == "ERROR")
 955                                 {
 956                                         return this->Error(params);
 957                                 }
 958
 959                         break;
 960                         case LISTENER:
 961                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
 962                                 return false;
 963                         break;
 964                         case CONNECTING:
 965                                 if (command == "SERVER")
 966                                 {
 967                                         // another server we connected to, which was in WAIT_AUTH_1 state,
 968                                         // has just sent us their credentials. If we get this far, theyre
 969                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
 970                                         // if we're happy with this, we should send our netburst which
 971                                         // kickstarts the merge.
 972                                         return this->Outbound_Reply_Server(params);
 973                                 }
 974                                 else if (command == "ERROR")
 975                                 {
 976                                         return this->Error(params);
 977                                 }
 978                         break;
 979                         case CONNECTED:
 980                                 // This is the 'authenticated' state, when all passwords
 981                                 // have been exchanged and anything past this point is taken
 982                                 // as gospel.
 983                                 std::string target = "";
 984                                 if ((command == "NICK") && (params.size() > 1))
 985                                 {
 986                                         return this->IntroduceClient(prefix,params);
 987                                 }
 988                                 else if (command == "FJOIN")
 989                                 {
 990                                         return this->ForceJoin(prefix,params);
 991                                 }
 992                                 else if (command == "SERVER")
 993                                 {
 994                                         return this->RemoteServer(prefix,params);
 995                                 }
 996                                 else if (command == "ERROR")
 997                                 {
 998                                         return this->Error(params);
 999                                 }
1000                                 else if (command == "OPERTYPE")
1001                                 {
1002                                         return this->OperType(prefix,params);
1003                                 }
1004                                 else if (command == "FMODE")
1005                                 {
1006                                         return this->ForceMode(prefix,params);
1007                                 }
1008                                 else if (command == "KILL")
1009                                 {
1010                                         return this->RemoteKill(prefix,params);
1011                                 }
1012                                 else if (command == "FTOPIC")
1013                                 {
1014                                         return this->ForceTopic(prefix,params);
1015                                 }
1016                                 else if (command == "REHASH")
1017                                 {
1018                                         return this->RemoteRehash(prefix,params);
1019                                 }
1020                                 else if (command == "SQUIT")
1021                                 {
1022                                         if (params.size() == 2)
1023                                         {
1024                                                 this->Squit(FindServer(params[0]),params[1]);
1025                                         }
1026                                         return true;
1027                                 }
1028                                 else
1029                                 {
1030                                         // not a special inter-server command.
1031                                         // Emulate the actual user doing the command,
1032                                         // this saves us having a huge ugly parser.
1033                                         userrec* who = Srv->FindNick(prefix);
1034                                         std::string sourceserv = this->myhost;
1035                                         if (this->InboundServerName != "")
1036                                         {
1037                                                 sourceserv = this->InboundServerName;
1038                                         }
1039                                         if (who)
1040                                         {
1041                                                 // its a user
1042                                                 target = who->server;
1043                                                 char* strparams[127];
1044                                                 for (unsigned int q = 0; q < params.size(); q++)
1045                                                 {
1046                                                         strparams[q] = (char*)params[q].c_str();
1047                                                 }
1048                                                 log(DEBUG,"*** CALL COMMAND HANDLER FOR %s, SOURCE: '%s'",command.c_str(),who->nick);
1049                                                 Srv->CallCommandHandler(command, strparams, params.size(), who);
1050                                         }
1051                                         else
1052                                         {
1053                                                 // its not a user. Its either a server, or somethings screwed up.
1054                                                 if (IsServer(prefix))
1055                                                 {
1056                                                         target = Srv->GetServerName();
1057                                                 }
1058                                                 else
1059                                                 {
1060                                                         log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
1061                                                         return true;
1062                                                 }
1063                                         }
1064                                         return DoOneToAllButSenderRaw(line,sourceserv);
1065
1066                                 }
1067                                 return true;
1068                         break;
1069                 }
1070                 return true;
1071         }
1072
1073         virtual std::string GetName()
1074         {
1075                 std::string sourceserv = this->myhost;
1076                 if (this->InboundServerName != "")
1077                 {
1078                         sourceserv = this->InboundServerName;
1079                 }
1080                 return sourceserv;
1081         }
1082
1083         virtual void OnTimeout()
1084         {
1085                 if (this->LinkState == CONNECTING)
1086                 {
1087                         Srv->SendOpers("*** CONNECT: Connection to \002"+myhost+"\002 timed out.");
1088                 }
1089         }
1090
1091         virtual void OnClose()
1092         {
1093                 // Connection closed.
1094                 // If the connection is fully up (state CONNECTED)
1095                 // then propogate a netsplit to all peers.
1096                 std::string quitserver = this->myhost;
1097                 if (this->InboundServerName != "")
1098                 {
1099                         quitserver = this->InboundServerName;
1100                 }
1101                 TreeServer* s = FindServer(quitserver);
1102                 if (s)
1103                 {
1104                         Squit(s,"Remote host closed the connection");
1105                 }
1106         }
1107
1108         virtual int OnIncomingConnection(int newsock, char* ip)
1109         {
1110                 TreeSocket* s = new TreeSocket(newsock, ip);
1111                 Srv->AddSocket(s);
1112                 return true;
1113         }
1114 };
1115
1116 bool DoOneToAllButSenderRaw(std::string data,std::string omit)
1117 {
1118         TreeServer* omitroute = BestRouteTo(omit);
1119         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1120         {
1121                 TreeServer* Route = TreeRoot->GetChild(x);
1122                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
1123                 {
1124                         TreeSocket* Sock = Route->GetSocket();
1125                         log(DEBUG,"Sending RAW to %s",Route->GetName().c_str());
1126                         Sock->WriteLine(data);
1127                 }
1128         }
1129         return true;
1130 }
1131
1132 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> params, std::string omit)
1133 {
1134         log(DEBUG,"ALLBUTONE: Comes from %s SHOULD NOT go back to %s",prefix.c_str(),omit.c_str());
1135         TreeServer* omitroute = BestRouteTo(omit);
1136         // TODO: Special stuff with privmsg and notice
1137         std::string FullLine = ":" + prefix + " " + command;
1138         for (unsigned int x = 0; x < params.size(); x++)
1139         {
1140                 FullLine = FullLine + " " + params[x];
1141         }
1142         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1143         {
1144                 TreeServer* Route = TreeRoot->GetChild(x);
1145                 // Send the line IF:
1146                 // The route has a socket (its a direct connection)
1147                 // The route isnt the one to be omitted
1148                 // The route isnt the path to the one to be omitted
1149                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
1150                 {
1151                         TreeSocket* Sock = Route->GetSocket();
1152                         log(DEBUG,"Sending to %s",Route->GetName().c_str());
1153                         Sock->WriteLine(FullLine);
1154                 }
1155         }
1156         return true;
1157 }
1158
1159 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> params)
1160 {
1161         Srv->Log(DEBUG,"ONETOMANY: "+command);
1162         std::string FullLine = ":" + prefix + " " + command;
1163         for (unsigned int x = 0; x < params.size(); x++)
1164         {
1165                 FullLine = FullLine + " " + params[x];
1166         }
1167         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1168         {
1169                 TreeServer* Route = TreeRoot->GetChild(x);
1170                 if (Route->GetSocket())
1171                 {
1172                         TreeSocket* Sock = Route->GetSocket();
1173                         Sock->WriteLine(FullLine);
1174                 }
1175         }
1176         return true;
1177 }
1178
1179 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> params, std::string target)
1180 {
1181         TreeServer* Route = BestRouteTo(target);
1182         if (Route)
1183         {
1184                 std::string FullLine = ":" + prefix + " " + command;
1185                 for (unsigned int x = 0; x < params.size(); x++)
1186                 {
1187                         FullLine = FullLine + " " + params[x];
1188                 }
1189                 if (Route->GetSocket())
1190                 {
1191                         TreeSocket* Sock = Route->GetSocket();
1192                         Sock->WriteLine(FullLine);
1193                 }
1194                 return true;
1195         }
1196         else
1197         {
1198                 log(DEBUG,"Could not route message with target %s: %s",target.c_str(),command.c_str());
1199                 return true;
1200         }
1201 }
1202
1203 std::vector<TreeSocket*> Bindings;
1204
1205 void ReadConfiguration(bool rebind)
1206 {
1207         if (rebind)
1208         {
1209                 for (int j =0; j < Conf->Enumerate("bind"); j++)
1210                 {
1211                         std::string Type = Conf->ReadValue("bind","type",j);
1212                         std::string IP = Conf->ReadValue("bind","address",j);
1213                         long Port = Conf->ReadInteger("bind","port",j,true);
1214                         if (Type == "servers")
1215                         {
1216                                 if (IP == "*")
1217                                 {
1218                                         IP = "";
1219                                 }
1220                                 TreeSocket* listener = new TreeSocket(IP.c_str(),Port,true,10);
1221                                 if (listener->GetState() == I_LISTENING)
1222                                 {
1223                                         Srv->AddSocket(listener);
1224                                         Bindings.push_back(listener);
1225                                 }
1226                                 else
1227                                 {
1228                                         log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
1229                                         listener->Close();
1230                                         delete listener;
1231                                 }
1232                         }
1233                 }
1234         }
1235         LinkBlocks.clear();
1236         for (int j =0; j < Conf->Enumerate("link"); j++)
1237         {
1238                 Link L;
1239                 L.Name = Conf->ReadValue("link","name",j);
1240                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
1241                 L.Port = Conf->ReadInteger("link","port",j,true);
1242                 L.SendPass = Conf->ReadValue("link","sendpass",j);
1243                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
1244                 LinkBlocks.push_back(L);
1245                 log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
1246         }
1247 }
1248
1249
1250 class ModuleSpanningTree : public Module
1251 {
1252         std::vector<TreeSocket*> Bindings;
1253         int line;
1254
1255  public:
1256
1257         ModuleSpanningTree()
1258         {
1259                 Srv = new Server;
1260                 Conf = new ConfigReader;
1261                 Bindings.clear();
1262
1263                 // Create the root of the tree
1264                 TreeRoot = new TreeServer(Srv->GetServerName(),Srv->GetServerDescription());
1265
1266                 ReadConfiguration(true);
1267         }
1268
1269         void ShowLinks(TreeServer* Current, userrec* user, int hops)
1270         {
1271                 std::string Parent = TreeRoot->GetName();
1272                 if (Current->GetParent())
1273                 {
1274                         Parent = Current->GetParent()->GetName();
1275                 }
1276                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1277                 {
1278                         ShowLinks(Current->GetChild(q),user,hops+1);
1279                 }
1280                 WriteServ(user->fd,"364 %s %s %s :%d %s",user->nick,Current->GetName().c_str(),Parent.c_str(),hops,Current->GetDesc().c_str());
1281         }
1282
1283         void HandleLinks(char** parameters, int pcnt, userrec* user)
1284         {
1285                 ShowLinks(TreeRoot,user,0);
1286                 WriteServ(user->fd,"365 %s * :End of /LINKS list.",user->nick);
1287                 return;
1288         }
1289
1290         void HandleLusers(char** parameters, int pcnt, userrec* user)
1291         {
1292                 return;
1293         }
1294
1295         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
1296
1297         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80])
1298         {
1299                 if (line < 128)
1300                 {
1301                         for (int t = 0; t < depth; t++)
1302                         {
1303                                 matrix[line][t] = ' ';
1304                         }
1305                         strlcpy(&matrix[line][depth],Current->GetName().c_str(),80);
1306                         line++;
1307                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
1308                         {
1309                                 ShowMap(Current->GetChild(q),user,depth+2,matrix);
1310                         }
1311                 }
1312         }
1313
1314         // Ok, prepare to be confused.
1315         // After much mulling over how to approach this, it struck me that
1316         // the 'usual' way of doing a /MAP isnt the best way. Instead of
1317         // keeping track of a ton of ascii characters, and line by line
1318         // under recursion working out where to place them using multiplications
1319         // and divisons, we instead render the map onto a backplane of characters
1320         // (a character matrix), then draw the branches as a series of "L" shapes
1321         // from the nodes. This is not only friendlier on CPU it uses less stack.
1322
1323         void HandleMap(char** parameters, int pcnt, userrec* user)
1324         {
1325                 // This array represents a virtual screen which we will
1326                 // "scratch" draw to, as the console device of an irc
1327                 // client does not provide for a proper terminal.
1328                 char matrix[128][80];
1329                 for (unsigned int t = 0; t < 128; t++)
1330                 {
1331                         matrix[t][0] = '\0';
1332                 }
1333                 line = 0;
1334                 // The only recursive bit is called here.
1335                 ShowMap(TreeRoot,user,0,matrix);
1336                 // Process each line one by one. The algorithm has a limit of
1337                 // 128 servers (which is far more than a spanning tree should have
1338                 // anyway, so we're ok). This limit can be raised simply by making
1339                 // the character matrix deeper, 128 rows taking 10k of memory.
1340                 for (int l = 1; l < line; l++)
1341                 {
1342                         // scan across the line looking for the start of the
1343                         // servername (the recursive part of the algorithm has placed
1344                         // the servers at indented positions depending on what they
1345                         // are related to)
1346                         int first_nonspace = 0;
1347                         while (matrix[l][first_nonspace] == ' ')
1348                         {
1349                                 first_nonspace++;
1350                         }
1351                         first_nonspace--;
1352                         // Draw the `- (corner) section: this may be overwritten by
1353                         // another L shape passing along the same vertical pane, becoming
1354                         // a |- (branch) section instead.
1355                         matrix[l][first_nonspace] = '-';
1356                         matrix[l][first_nonspace-1] = '`';
1357                         int l2 = l - 1;
1358                         // Draw upwards until we hit the parent server, causing possibly
1359                         // other corners (`-) to become branches (|-)
1360                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
1361                         {
1362                                 matrix[l2][first_nonspace-1] = '|';
1363                                 l2--;
1364                         }
1365                 }
1366                 // dump the whole lot to the user. This is the easy bit, honest.
1367                 for (int t = 0; t < line; t++)
1368                 {
1369                         WriteServ(user->fd,"006 %s :%s",user->nick,&matrix[t][0]);
1370                 }
1371                 WriteServ(user->fd,"007 %s :End of /MAP",user->nick);
1372                 return;
1373         }
1374
1375         int HandleSquit(char** parameters, int pcnt, userrec* user)
1376         {
1377                 return 1;
1378         }
1379
1380         int HandleConnect(char** parameters, int pcnt, userrec* user)
1381         {
1382                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
1383                 {
1384                         if (Srv->MatchText(x->Name.c_str(),parameters[0]))
1385                         {
1386                                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: Connecting to server: %s (%s:%d)",user->nick,x->Name.c_str(),x->IPAddr.c_str(),x->Port);
1387                                 TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name);
1388                                 Srv->AddSocket(newsocket);
1389                                 return 1;
1390                         }
1391                 }
1392                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: No matching server could be found in the config file.",user->nick);
1393                 return 1;
1394         }
1395
1396         virtual int OnPreCommand(std::string command, char **parameters, int pcnt, userrec *user)
1397         {
1398                 if (command == "CONNECT")
1399                 {
1400                         return this->HandleConnect(parameters,pcnt,user);
1401                 }
1402                 else if (command == "SQUIT")
1403                 {
1404                         return this->HandleSquit(parameters,pcnt,user);
1405                 }
1406                 else if (command == "MAP")
1407                 {
1408                         this->HandleMap(parameters,pcnt,user);
1409                         return 1;
1410                 }
1411                 else if (command == "LUSERS")
1412                 {
1413                         this->HandleLusers(parameters,pcnt,user);
1414                         return 1;
1415                 }
1416                 else if (command == "LINKS")
1417                 {
1418                         this->HandleLinks(parameters,pcnt,user);
1419                         return 1;
1420                 }
1421                 else if (Srv->IsValidModuleCommand(command, pcnt, user))
1422                 {
1423                         // this bit of code cleverly routes all module commands
1424                         // to all remote severs *automatically* so that modules
1425                         // can just handle commands locally, without having
1426                         // to have any special provision in place for remote
1427                         // commands and linking protocols.
1428                         std::deque<std::string> params;
1429                         params.clear();
1430                         for (int j = 0; j < pcnt; j++)
1431                         {
1432                                 if (strchr(parameters[j],' '))
1433                                 {
1434                                         params.push_back(":" + std::string(parameters[j]));
1435                                 }
1436                                 else
1437                                 {
1438                                         params.push_back(std::string(parameters[j]));
1439                                 }
1440                         }
1441                         DoOneToMany(user->nick,command,params);
1442                 }
1443                 return 0;
1444         }
1445
1446         virtual void OnGetServerDescription(std::string servername,std::string &description)
1447         {
1448                 TreeServer* s = FindServer(servername);
1449                 if (s)
1450                 {
1451                         description = s->GetDesc();
1452                 }
1453         }
1454
1455         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
1456         {
1457                 if (std::string(source->server) == Srv->GetServerName())
1458                 {
1459                         std::deque<std::string> params;
1460                         params.push_back(dest->nick);
1461                         params.push_back(channel->name);
1462                         DoOneToMany(source->nick,"INVITE",params);
1463                 }
1464         }
1465
1466         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, std::string topic)
1467         {
1468                 std::deque<std::string> params;
1469                 params.push_back(chan->name);
1470                 params.push_back(":"+topic);
1471                 DoOneToMany(user->nick,"TOPIC",params);
1472         }
1473
1474         virtual void OnUserNotice(userrec* user, void* dest, int target_type, std::string text)
1475         {
1476                 if (target_type == TYPE_USER)
1477                 {
1478                         userrec* d = (userrec*)dest;
1479                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
1480                         {
1481                                 std::deque<std::string> params;
1482                                 params.clear();
1483                                 params.push_back(d->nick);
1484                                 params.push_back(":"+text);
1485                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
1486                         }
1487                 }
1488                 else
1489                 {
1490                         if (std::string(user->server) == Srv->GetServerName())
1491                         {
1492                                 chanrec *c = (chanrec*)dest;
1493                                 std::deque<std::string> params;
1494                                 params.push_back(c->name);
1495                                 params.push_back(":"+text);
1496                                 DoOneToMany(user->nick,"NOTICE",params);
1497                         }
1498                 }
1499         }
1500
1501         virtual void OnUserMessage(userrec* user, void* dest, int target_type, std::string text)
1502         {
1503                 if (target_type == TYPE_USER)
1504                 {
1505                         // route private messages which are targetted at clients only to the server
1506                         // which needs to receive them
1507                         userrec* d = (userrec*)dest;
1508                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
1509                         {
1510                                 std::deque<std::string> params;
1511                                 params.clear();
1512                                 params.push_back(d->nick);
1513                                 params.push_back(":"+text);
1514                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
1515                         }
1516                 }
1517                 else
1518                 {
1519                         if (std::string(user->server) == Srv->GetServerName())
1520                         {
1521                                 chanrec *c = (chanrec*)dest;
1522                                 std::deque<std::string> params;
1523                                 params.push_back(c->name);
1524                                 params.push_back(":"+text);
1525                                 DoOneToMany(user->nick,"PRIVMSG",params);
1526                         }
1527                 }
1528         }
1529
1530         virtual void OnUserJoin(userrec* user, chanrec* channel)
1531         {
1532                 // Only do this for local users
1533                 if (std::string(user->server) == Srv->GetServerName())
1534                 {
1535                         log(DEBUG,"**** User on %s JOINS %s",user->server,channel->name);
1536                         std::deque<std::string> params;
1537                         params.clear();
1538                         params.push_back(channel->name);
1539                         if (*channel->key)
1540                         {
1541                                 log(DEBUG,"**** With key %s",channel->key);
1542                                 // if the channel has a key, force the join by emulating the key.
1543                                 params.push_back(channel->key);
1544                         }
1545                         DoOneToMany(user->nick,"JOIN",params);
1546                 }
1547         }
1548
1549         virtual void OnUserPart(userrec* user, chanrec* channel)
1550         {
1551                 if (std::string(user->server) == Srv->GetServerName())
1552                 {
1553                         log(DEBUG,"**** User on %s PARTS %s",user->server,channel->name);
1554                         std::deque<std::string> params;
1555                         params.clear();
1556                         params.push_back(channel->name);
1557                         DoOneToMany(user->nick,"PART",params);
1558                 }
1559         }
1560
1561         virtual void OnUserConnect(userrec* user)
1562         {
1563                 char agestr[MAXBUF];
1564                 if (std::string(user->server) == Srv->GetServerName())
1565                 {
1566                         log(DEBUG,"**** User on %s CONNECTS: %s",user->server,user->nick);
1567                         std::deque<std::string> params;
1568                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
1569                         params.clear();
1570                         params.push_back(agestr);
1571                         params.push_back(user->nick);
1572                         params.push_back(user->host);
1573                         params.push_back(user->dhost);
1574                         params.push_back(user->ident);
1575                         params.push_back("+"+std::string(user->modes));
1576                         params.push_back(user->ip);
1577                         params.push_back(":"+std::string(user->fullname));
1578                         DoOneToMany(Srv->GetServerName(),"NICK",params);
1579                 }
1580         }
1581
1582         virtual void OnUserQuit(userrec* user, std::string reason)
1583         {
1584                 if (std::string(user->server) == Srv->GetServerName())
1585                 {
1586                         log(DEBUG,"**** User on %s QUITS: %s",user->server,user->nick);
1587                         std::deque<std::string> params;
1588                         params.push_back(":"+reason);
1589                         DoOneToMany(user->nick,"QUIT",params);
1590                 }
1591         }
1592
1593         virtual void OnUserPostNick(userrec* user, std::string oldnick)
1594         {
1595                 if (std::string(user->server) == Srv->GetServerName())
1596                 {
1597                         log(DEBUG,"**** User on %s changes NICK: %s",user->server,user->nick);
1598                         std::deque<std::string> params;
1599                         params.push_back(user->nick);
1600                         DoOneToMany(oldnick,"NICK",params);
1601                 }
1602         }
1603
1604         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, std::string reason)
1605         {
1606                 if (std::string(source->server) == Srv->GetServerName())
1607                 {
1608                         log(DEBUG,"**** User on %s KICKs: %s %s",source->server,source->nick,user->nick);
1609                         std::deque<std::string> params;
1610                         params.push_back(chan->name);
1611                         params.push_back(user->nick);
1612                         params.push_back(":"+reason);
1613                         DoOneToMany(source->nick,"KICK",params);
1614                 }
1615         }
1616
1617         virtual void OnRemoteKill(userrec* source, userrec* dest, std::string reason)
1618         {
1619                 std::deque<std::string> params;
1620                 params.push_back(dest->nick);
1621                 params.push_back(":"+reason);
1622                 DoOneToMany(source->nick,"KILL",params);
1623         }
1624
1625         virtual void OnRehash(std::string parameter)
1626         {
1627                 if (parameter != "")
1628                 {
1629                         std::deque<std::string> params;
1630                         params.push_back(parameter);
1631                         DoOneToMany(Srv->GetServerName(),"REHASH",params);
1632                         // check for self
1633                         if (Srv->MatchText(Srv->GetServerName(),parameter))
1634                         {
1635                                 Srv->SendOpers("*** Remote rehash initiated from server \002"+Srv->GetServerName()+"\002.");
1636                                 Srv->RehashServer();
1637                         }
1638                 }
1639                 ReadConfiguration(false);
1640         }
1641
1642         // note: the protocol does not allow direct umode +o except
1643         // via NICK with 8 params. sending OPERTYPE infers +o modechange
1644         // locally.
1645         virtual void OnOper(userrec* user, std::string opertype)
1646         {
1647                 if (std::string(user->server) == Srv->GetServerName())
1648                 {
1649                         std::deque<std::string> params;
1650                         params.push_back(opertype);
1651                         DoOneToMany(user->nick,"OPERTYPE",params);
1652                 }
1653         }
1654
1655         virtual void OnMode(userrec* user, void* dest, int target_type, std::string text)
1656         {
1657                 log(DEBUG,"*** ONMODE TRIGGER");
1658                 if (std::string(user->server) == Srv->GetServerName())
1659                 {
1660                         log(DEBUG,"*** LOCAL");
1661                         if (target_type == TYPE_USER)
1662                         {
1663                                 userrec* u = (userrec*)dest;
1664                                 std::deque<std::string> params;
1665                                 params.push_back(u->nick);
1666                                 params.push_back(text);
1667                                 DoOneToMany(user->nick,"MODE",params);
1668                         }
1669                         else
1670                         {
1671                                 chanrec* c = (chanrec*)dest;
1672                                 std::deque<std::string> params;
1673                                 params.push_back(c->name);
1674                                 params.push_back(text);
1675                                 DoOneToMany(user->nick,"MODE",params);
1676                         }
1677                 }
1678         }
1679
1680         virtual void ProtoSendMode(void* opaque, int target_type, void* target, std::string modeline)
1681         {
1682                 TreeSocket* s = (TreeSocket*)opaque;
1683                 if (target)
1684                 {
1685                         if (target_type == TYPE_USER)
1686                         {
1687                                 userrec* u = (userrec*)target;
1688                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+u->nick+" "+modeline);
1689                         }
1690                         else
1691                         {
1692                                 chanrec* c = (chanrec*)target;
1693                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+modeline);
1694                         }
1695                 }
1696         }
1697
1698         virtual ~ModuleSpanningTree()
1699         {
1700                 delete Srv;
1701         }
1702
1703         virtual Version GetVersion()
1704         {
1705                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
1706         }
1707 };
1708
1709
1710 class ModuleSpanningTreeFactory : public ModuleFactory
1711 {
1712  public:
1713         ModuleSpanningTreeFactory()
1714         {
1715         }
1716
1717         ~ModuleSpanningTreeFactory()
1718         {
1719         }
1720
1721         virtual Module * CreateModule()
1722         {
1723                 TreeProtocolModule = new ModuleSpanningTree;
1724                 return TreeProtocolModule;
1725         }
1726
1727 };
1728
1729
1730 extern "C" void * init_module( void )
1731 {
1732         return new ModuleSpanningTreeFactory;
1733 }
1734