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, std::string prefix,std::string command,std::deque<std::string> params);
  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         if (ServerName.c_str() == TreeRoot->GetName())
 233         {
 234                 return NULL;
 235         }
 236         // first, find the server by recursively walking the tree
 237         TreeServer* Found = RouteEnumerate(TreeRoot,ServerName);
 238         // did we find it? If not, they did something wrong, abort.
 239         if (!Found)
 240         {
 241                 return NULL;
 242         }
 243         else
 244         {
 245                 // The server exists, follow its parent nodes until
 246                 // the parent of the current is 'TreeRoot', we know
 247                 // then that this is a directly-connected server.
 248                 while ((Found) && (Found->GetParent() != TreeRoot))
 249                 {
 250                         Found = Found->GetParent();
 251                 }
 252                 return Found;
 253         }
 254 }
 255
 256 bool LookForServer(TreeServer* Current, std::string ServerName)
 257 {
 258         if (ServerName == Current->GetName())
 259                 return true;
 260         for (unsigned int q = 0; q < Current->ChildCount(); q++)
 261         {
 262                 if (LookForServer(Current->GetChild(q),ServerName))
 263                         return true;
 264         }
 265         return false;
 266 }
 267
 268 TreeServer* Found;
 269
 270 void RFindServer(TreeServer* Current, std::string ServerName)
 271 {
 272         if ((ServerName == Current->GetName()) && (!Found))
 273         {
 274                 Found = Current;
 275                 return;
 276         }
 277         if (!Found)
 278         {
 279                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 280                 {
 281                         if (!Found)
 282                                 RFindServer(Current->GetChild(q),ServerName);
 283                 }
 284         }
 285         return;
 286 }
 287
 288 TreeServer* FindServer(std::string ServerName)
 289 {
 290         Found = NULL;
 291         RFindServer(TreeRoot,ServerName);
 292         return Found;
 293 }
 294
 295 bool IsServer(std::string ServerName)
 296 {
 297         return LookForServer(TreeRoot,ServerName);
 298 }
 299
 300 class TreeSocket : public InspSocket
 301 {
 302         std::string myhost;
 303         std::string in_buffer;
 304         ServerState LinkState;
 305         std::string InboundServerName;
 306         std::string InboundDescription;
 307         int num_lost_users;
 308         int num_lost_servers;
 309
 310  public:
 311
 312         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime)
 313                 : InspSocket(host, port, listening, maxtime)
 314         {
 315                 myhost = host;
 316                 this->LinkState = LISTENER;
 317         }
 318
 319         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 320                 : InspSocket(host, port, listening, maxtime)
 321         {
 322                 myhost = ServerName;
 323                 this->LinkState = CONNECTING;
 324         }
 325
 326         TreeSocket(int newfd, char* ip)
 327                 : InspSocket(newfd, ip)
 328         {
 329                 this->LinkState = WAIT_AUTH_1;
 330         }
 331
 332         virtual bool OnConnected()
 333         {
 334                 if (this->LinkState == CONNECTING)
 335                 {
 336                         Srv->SendOpers("*** Connection to "+myhost+"["+this->GetIP()+"] established.");
 337                         // we should send our details here.
 338                         // if the other side is satisfied, they send theirs.
 339                         // we do not need to change state here.
 340                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 341                         {
 342                                 if (x->Name == this->myhost)
 343                                 {
 344                                         // found who we're supposed to be connecting to, send the neccessary gubbins.
 345                                         this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 346                                         return true;
 347                                 }
 348                         }
 349                 }
 350                 return true;
 351         }
 352
 353         virtual void OnError(InspSocketError e)
 354         {
 355         }
 356
 357         virtual int OnDisconnect()
 358         {
 359                 return true;
 360         }
 361
 362         // recursively send the server tree with distances as hops
 363         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 364         {
 365                 char command[1024];
 366                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 367                 {
 368                         TreeServer* recursive_server = Current->GetChild(q);
 369                         if (recursive_server != s)
 370                         {
 371                                 // :source.server SERVER server.name hops :Description
 372                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 373                                 this->WriteLine(command);
 374                                 // down to next level
 375                                 this->SendServers(recursive_server, s, hops+1);
 376                         }
 377                 }
 378         }
 379
 380         void SquitServer(TreeServer* Current)
 381         {
 382                 // recursively squit the servers attached to 'Current'
 383                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 384                 {
 385                         TreeServer* recursive_server = Current->GetChild(q);
 386                         this->SquitServer(recursive_server);
 387                 }
 388                 // Now we've whacked the kids, whack self
 389                 num_lost_servers++;
 390                 bool quittingpeople = true;
 391                 while (quittingpeople)
 392                 {
 393                         quittingpeople = false;
 394                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 395                         {
 396                                 if (!strcasecmp(u->second->server,Current->GetName().c_str()))
 397                                 {
 398                                         Srv->QuitUser(u->second,Current->GetName()+" "+std::string(Srv->GetServerName()));
 399                                         num_lost_users++;
 400                                         quittingpeople = true;
 401                                         break;
 402                                 }
 403                         }
 404                 }
 405         }
 406
 407         void Squit(TreeServer* Current,std::string reason)
 408         {
 409                 if (Current)
 410                 {
 411                         std::deque<std::string> params;
 412                         params.push_back(Current->GetName());
 413                         params.push_back(":"+reason);
 414                         DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
 415                         if (Current->GetParent() == TreeRoot)
 416                         {
 417                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
 418                         }
 419                         else
 420                         {
 421                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
 422                         }
 423                         num_lost_servers = 0;
 424                         num_lost_users = 0;
 425                         SquitServer(Current);
 426                         Current->Tidy();
 427                         Current->GetParent()->DelChild(Current);
 428                         delete Current;
 429                         WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
 430                 }
 431                 else
 432                 {
 433                         log(DEFAULT,"Squit from unknown server");
 434                 }
 435         }
 436
 437         bool ForceMode(std::string source, std::deque<std::string> params)
 438         {
 439                 userrec* who = new userrec;
 440                 who->fd = FD_MAGIC_NUMBER;
 441                 if (params.size() < 2)
 442                         return true;
 443                 char* modelist[255];
 444                 for (unsigned int q = 0; q < params.size(); q++)
 445                 {
 446                         modelist[q] = (char*)params[q].c_str();
 447                 }
 448                 Srv->SendMode(modelist,params.size(),who);
 449                 DoOneToAllButSender(source,"FMODE",params,source);
 450                 delete who;
 451                 return true;
 452         }
 453
 454         bool ForceTopic(std::string source, std::deque<std::string> params)
 455         {
 456                 // FTOPIC %s %lu %s :%s
 457                 if (params.size() != 4)
 458                         return true;
 459                 std::string channel = params[0];
 460                 time_t ts = atoi(params[1].c_str());
 461                 std::string setby = params[2];
 462                 std::string topic = params[3];
 463
 464                 chanrec* c = Srv->FindChannel(channel);
 465                 if (c)
 466                 {
 467                         if ((ts >= c->topicset) || (!*c->topic))
 468                         {
 469                                 strlcpy(c->topic,topic.c_str(),MAXTOPIC);
 470                                 strlcpy(c->setby,setby.c_str(),NICKMAX);
 471                                 c->topicset = ts;
 472                                 WriteChannelWithServ((char*)source.c_str(), c, "TOPIC %s :%s", c->name, c->topic);
 473                         }
 474
 475                 }
 476
 477                 // all done, send it on its way
 478                 params[3] = ":" + params[3];
 479                 DoOneToAllButSender(source,"FTOPIC",params,source);
 480
 481                 return true;
 482         }
 483
 484         bool ForceJoin(std::string source, std::deque<std::string> params)
 485         {
 486                 if (params.size() < 2)
 487                         return true;
 488
 489                 char first[MAXBUF];
 490                 char modestring[MAXBUF];
 491                 char* mode_users[127];
 492                 mode_users[0] = first;
 493                 mode_users[1] = modestring;
 494                 strcpy(mode_users[1],"+");
 495                 unsigned int modectr = 2;
 496
 497                 userrec* who = NULL;
 498                 std::string channel = params[0];
 499                 char* key = "";
 500                 chanrec* chan = Srv->FindChannel(channel);
 501                 if (chan)
 502                 {
 503                         key = chan->key;
 504                 }
 505                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
 506                 for (unsigned int usernum = 1; usernum < params.size(); usernum++)
 507                 {
 508                         // process one channel at a time, applying modes.
 509                         char* usr = (char*)params[usernum].c_str();
 510                         char permissions = *usr;
 511                         switch (permissions)
 512                         {
 513                                 case '@':
 514                                         usr++;
 515                                         mode_users[modectr++] = usr;
 516                                         strlcat(modestring,"o",MAXBUF);
 517                                 break;
 518                                 case '%':
 519                                         usr++;
 520                                         mode_users[modectr++] = usr;
 521                                         strlcat(modestring,"h",MAXBUF);
 522                                 break;
 523                                 case '+':
 524                                         usr++;
 525                                         mode_users[modectr++] = usr;
 526                                         strlcat(modestring,"v",MAXBUF);
 527                                 break;
 528                         }
 529                         who = Srv->FindNick(usr);
 530                         if (who)
 531                         {
 532                                 Srv->JoinUserToChannel(who,channel,key);
 533                                 if (modectr >= (MAXMODES-1))
 534                                 {
 535                                         // theres a mode for this user. push them onto the mode queue, and flush it
 536                                         // if there are more than MAXMODES to go.
 537                                         Srv->SendMode(mode_users,modectr,who);
 538                                         strcpy(mode_users[1],"+");
 539                                         modectr = 2;
 540                                 }
 541                         }
 542                 }
 543                 // there werent enough modes built up to flush it during FJOIN,
 544                 // or, there are a number left over. flush them out.
 545                 if ((modectr > 2) && (who))
 546                 {
 547                         Srv->SendMode(mode_users,modectr,who);
 548                 }
 549                 DoOneToAllButSender(source,"FJOIN",params,source);
 550                 return true;
 551         }
 552
 553         bool IntroduceClient(std::string source, std::deque<std::string> params)
 554         {
 555                 if (params.size() < 8)
 556                         return true;
 557                 // NICK age nick host dhost ident +modes ip :gecos
 558                 //       0   1    2    3      4     5    6   7
 559                 std::string nick = params[1];
 560                 std::string host = params[2];
 561                 std::string dhost = params[3];
 562                 std::string ident = params[4];
 563                 time_t age = atoi(params[0].c_str());
 564                 std::string modes = params[5];
 565                 if (*(modes.c_str()) == '+')
 566                 {
 567                         char* m = (char*)modes.c_str();
 568                         m++;
 569                         modes = m;
 570                 }
 571                 std::string ip = params[6];
 572                 std::string gecos = params[7];
 573                 char* tempnick = (char*)nick.c_str();
 574                 log(DEBUG,"Introduce client %s!%s@%s",tempnick,ident.c_str(),host.c_str());
 575
 576                 user_hash::iterator iter;
 577                 iter = clientlist.find(tempnick);
 578                 if (iter != clientlist.end())
 579                 {
 580                         // nick collision
 581                         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);
 582                         this->WriteLine(":"+Srv->GetServerName()+" KILL "+tempnick+" :Nickname collision");
 583                         return true;
 584                 }
 585
 586                 clientlist[tempnick] = new userrec();
 587                 clientlist[tempnick]->fd = FD_MAGIC_NUMBER;
 588                 strlcpy(clientlist[tempnick]->nick, tempnick,NICKMAX);
 589                 strlcpy(clientlist[tempnick]->host, host.c_str(),160);
 590                 strlcpy(clientlist[tempnick]->dhost, dhost.c_str(),160);
 591                 clientlist[tempnick]->server = (char*)FindServerNamePtr(source.c_str());
 592                 strlcpy(clientlist[tempnick]->ident, ident.c_str(),IDENTMAX);
 593                 strlcpy(clientlist[tempnick]->fullname, gecos.c_str(),MAXGECOS);
 594                 clientlist[tempnick]->registered = 7;
 595                 clientlist[tempnick]->signon = age;
 596                 strlcpy(clientlist[tempnick]->ip,ip.c_str(),16);
 597                 for (int i = 0; i < MAXCHANS; i++)
 598                 {
 599                         clientlist[tempnick]->chans[i].channel = NULL;
 600                         clientlist[tempnick]->chans[i].uc_modes = 0;
 601                 }
 602                 params[7] = ":" + params[7];
 603                 DoOneToAllButSender(source,"NICK",params,source);
 604                 return true;
 605         }
 606
 607         void SendFJoins(TreeServer* Current, chanrec* c)
 608         {
 609                 char list[MAXBUF];
 610                 snprintf(list,MAXBUF,":%s FJOIN %s",Srv->GetServerName().c_str(),c->name);
 611                 std::vector<char*> *ulist = c->GetUsers();
 612                 for (unsigned int i = 0; i < ulist->size(); i++)
 613                 {
 614                         char* o = (*ulist)[i];
 615                         userrec* otheruser = (userrec*)o;
 616                         strlcat(list," ",MAXBUF);
 617                         strlcat(list,cmode(otheruser,c),MAXBUF);
 618                         strlcat(list,otheruser->nick,MAXBUF);
 619                         if (strlen(list)>(480-NICKMAX))
 620                         {
 621                                 this->WriteLine(list);
 622                                 snprintf(list,MAXBUF,":%s FJOIN %s",Srv->GetServerName().c_str(),c->name);
 623                         }
 624                 }
 625                 if (list[strlen(list)-1] != ':')
 626                 {
 627                         this->WriteLine(list);
 628                 }
 629         }
 630
 631         void SendChannelModes(TreeServer* Current)
 632         {
 633                 char data[MAXBUF];
 634                 for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 635                 {
 636                         SendFJoins(Current, c->second);
 637                         snprintf(data,MAXBUF,":%s FMODE %s +%s",Srv->GetServerName().c_str(),c->second->name,chanmodes(c->second));
 638                         this->WriteLine(data);
 639                         if (*c->second->topic)
 640                         {
 641                                 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);
 642                                 this->WriteLine(data);
 643                         }
 644                         for (BanList::iterator b = c->second->bans.begin(); b != c->second->bans.end(); b++)
 645                         {
 646                                 snprintf(data,MAXBUF,":%s FMODE %s +b %s",Srv->GetServerName().c_str(),c->second->name,b->data);
 647                                 this->WriteLine(data);
 648                         }
 649                         FOREACH_MOD OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this);
 650                 }
 651         }
 652
 653         // send all users and their channels
 654         void SendUsers(TreeServer* Current)
 655         {
 656                 char data[MAXBUF];
 657                 for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 658                 {
 659                         if (u->second->registered == 7)
 660                         {
 661                                 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);
 662                                 this->WriteLine(data);
 663                                 if (strchr(u->second->modes,'o'))
 664                                 {
 665                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
 666                                 }
 667                                 //char* chl = chlist(u->second,u->second);
 668                                 //if (*chl)
 669                                 //{
 670                                 //      this->WriteLine(":"+std::string(u->second->nick)+" FJOIN "+std::string(chl));
 671                                 //}
 672                                 FOREACH_MOD OnSyncUser(u->second,(Module*)TreeProtocolModule,(void*)this);
 673                         }
 674                 }
 675         }
 676
 677         void DoBurst(TreeServer* s)
 678         {
 679                 Srv->SendOpers("*** Bursting to "+s->GetName()+".");
 680                 this->WriteLine("BURST");
 681                 // Send server tree
 682                 this->SendServers(TreeRoot,s,1);
 683                 // Send users and their channels
 684                 this->SendUsers(s);
 685                 // TODO: Send everything else (channel modes etc)
 686                 this->SendChannelModes(s);
 687                 this->WriteLine("ENDBURST");
 688         }
 689
 690         virtual bool OnDataReady()
 691         {
 692                 char* data = this->Read();
 693                 if (data)
 694                 {
 695                         this->in_buffer += data;
 696                         while (in_buffer.find("\n") != std::string::npos)
 697                         {
 698                                 char* line = (char*)in_buffer.c_str();
 699                                 std::string ret = "";
 700                                 while ((*line != '\n') && (strlen(line)))
 701                                 {
 702                                         ret = ret + *line;
 703                                         line++;
 704                                 }
 705                                 if ((*line == '\n') || (*line == '\r'))
 706                                         line++;
 707                                 in_buffer = line;
 708                                 if (!this->ProcessLine(ret))
 709                                 {
 710                                         return false;
 711                                 }
 712                         }
 713                 }
 714                 return (data != NULL);
 715         }
 716
 717         int WriteLine(std::string line)
 718         {
 719                 return this->Write(line + "\r\n");
 720         }
 721
 722         bool Error(std::deque<std::string> params)
 723         {
 724                 if (params.size() < 1)
 725                         return false;
 726                 std::string Errmsg = params[0];
 727                 std::string SName = myhost;
 728                 if (InboundServerName != "")
 729                 {
 730                         SName = InboundServerName;
 731                 }
 732                 Srv->SendOpers("*** ERROR from "+SName+": "+Errmsg);
 733                 // we will return false to cause the socket to close.
 734                 return false;
 735         }
 736
 737         bool OperType(std::string prefix, std::deque<std::string> params)
 738         {
 739                 if (params.size() != 1)
 740                         return true;
 741                 std::string opertype = params[0];
 742                 userrec* u = Srv->FindNick(prefix);
 743                 if (u)
 744                 {
 745                         strlcpy(u->oper,opertype.c_str(),NICKMAX);
 746                         if (!strchr(u->modes,'o'))
 747                         {
 748                                 strcat(u->modes,"o");
 749                         }
 750                         DoOneToAllButSender(u->server,"OPERTYPE",params,u->server);
 751                 }
 752                 return true;
 753         }
 754
 755         bool RemoteRehash(std::string prefix, std::deque<std::string> params)
 756         {
 757                 if (params.size() < 1)
 758                         return true;
 759                 std::string servermask = params[0];
 760                 if (Srv->MatchText(Srv->GetServerName(),servermask))
 761                 {
 762                         Srv->SendOpers("*** Remote rehash initiated from server \002"+prefix+"\002.");
 763                         Srv->RehashServer();
 764                         ReadConfiguration(false);
 765                 }
 766                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
 767                 return true;
 768         }
 769
 770         bool RemoteKill(std::string prefix, std::deque<std::string> params)
 771         {
 772                 if (params.size() != 2)
 773                         return true;
 774                 std::string nick = params[0];
 775                 std::string reason = params[1];
 776                 userrec* u = Srv->FindNick(prefix);
 777                 userrec* who = Srv->FindNick(nick);
 778                 if (who)
 779                 {
 780                         std::string sourceserv = prefix;
 781                         if (u)
 782                         {
 783                                 sourceserv = u->server;
 784                         }
 785                         params[1] = ":" + params[1];
 786                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
 787                         Srv->QuitUser(who,reason);
 788                 }
 789                 return true;
 790         }
 791
 792         bool RemoteServer(std::string prefix, std::deque<std::string> params)
 793         {
 794                 if (params.size() < 4)
 795                         return false;
 796                 std::string servername = params[0];
 797                 std::string password = params[1];
 798                 // hopcount is not used for a remote server, we calculate this ourselves
 799                 std::string description = params[3];
 800                 TreeServer* ParentOfThis = FindServer(prefix);
 801                 if (!ParentOfThis)
 802                 {
 803                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
 804                         return false;
 805                 }
 806                 TreeServer* Node = new TreeServer(servername,description,ParentOfThis,NULL);
 807                 ParentOfThis->AddChild(Node);
 808                 params[3] = ":" + params[3];
 809                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
 810                 Srv->SendOpers("*** Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
 811                 return true;
 812         }
 813
 814         bool Outbound_Reply_Server(std::deque<std::string> params)
 815         {
 816                 if (params.size() < 4)
 817                         return false;
 818                 std::string servername = params[0];
 819                 std::string password = params[1];
 820                 int hops = atoi(params[2].c_str());
 821                 if (hops)
 822                 {
 823                         this->WriteLine("ERROR :Server too far away for authentication");
 824                         return false;
 825                 }
 826                 std::string description = params[3];
 827                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 828                 {
 829                         if ((x->Name == servername) && (x->RecvPass == password))
 830                         {
 831                                 // Begin the sync here. this kickstarts the
 832                                 // other side, waiting in WAIT_AUTH_2 state,
 833                                 // into starting their burst, as it shows
 834                                 // that we're happy.
 835                                 this->LinkState = CONNECTED;
 836                                 // we should add the details of this server now
 837                                 // to the servers tree, as a child of the root
 838                                 // node.
 839                                 TreeServer* Node = new TreeServer(servername,description,TreeRoot,this);
 840                                 TreeRoot->AddChild(Node);
 841                                 params[3] = ":" + params[3];
 842                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,servername);
 843                                 this->DoBurst(Node);
 844                                 return true;
 845                         }
 846                 }
 847                 this->WriteLine("ERROR :Invalid credentials");
 848                 return false;
 849         }
 850
 851         bool Inbound_Server(std::deque<std::string> params)
 852         {
 853                 if (params.size() < 4)
 854                         return false;
 855                 std::string servername = params[0];
 856                 std::string password = params[1];
 857                 int hops = atoi(params[2].c_str());
 858                 if (hops)
 859                 {
 860                         this->WriteLine("ERROR :Server too far away for authentication");
 861                         return false;
 862                 }
 863                 std::string description = params[3];
 864                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 865                 {
 866                         if ((x->Name == servername) && (x->RecvPass == password))
 867                         {
 868                                 Srv->SendOpers("*** Verified incoming server connection from \002"+servername+"\002["+this->GetIP()+"] ("+description+")");
 869                                 this->InboundServerName = servername;
 870                                 this->InboundDescription = description;
 871                                 // this is good. Send our details: Our server name and description and hopcount of 0,
 872                                 // along with the sendpass from this block.
 873                                 this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 874                                 // move to the next state, we are now waiting for THEM.
 875                                 this->LinkState = WAIT_AUTH_2;
 876                                 return true;
 877                         }
 878                 }
 879                 this->WriteLine("ERROR :Invalid credentials");
 880                 return false;
 881         }
 882
 883         std::deque<std::string> Split(std::string line, bool stripcolon)
 884         {
 885                 std::deque<std::string> n;
 886                 if (!strchr(line.c_str(),' '))
 887                 {
 888                         n.push_back(line);
 889                         return n;
 890                 }
 891                 std::stringstream s(line);
 892                 std::string param = "";
 893                 n.clear();
 894                 int item = 0;
 895                 while (!s.eof())
 896                 {
 897                         char c;
 898                         s.get(c);
 899                         if (c == ' ')
 900                         {
 901                                 n.push_back(param);
 902                                 param = "";
 903                                 item++;
 904                         }
 905                         else
 906                         {
 907                                 if (!s.eof())
 908                                 {
 909                                         param = param + c;
 910                                 }
 911                                 if ((param == ":") && (item > 0))
 912                                 {
 913                                         param = "";
 914                                         while (!s.eof())
 915                                         {
 916                                                 s.get(c);
 917                                                 if (!s.eof())
 918                                                 {
 919                                                         param = param + c;
 920                                                 }
 921                                         }
 922                                         n.push_back(param);
 923                                         param = "";
 924                                 }
 925                         }
 926                 }
 927                 if (param != "")
 928                 {
 929                         n.push_back(param);
 930                 }
 931                 return n;
 932         }
 933
 934         bool ProcessLine(std::string line)
 935         {
 936                 char* l = (char*)line.c_str();
 937                 while ((strlen(l)) && (l[strlen(l)-1] == '\r') || (l[strlen(l)-1] == '\n'))
 938                         l[strlen(l)-1] = '\0';
 939                 line = l;
 940                 if (line == "")
 941                         return true;
 942                 Srv->Log(DEBUG,"IN: '"+line+"'");
 943                 std::deque<std::string> params = this->Split(line,true);
 944                 std::string command = "";
 945                 std::string prefix = "";
 946                 if (((params[0].c_str())[0] == ':') && (params.size() > 1))
 947                 {
 948                         prefix = params[0];
 949                         command = params[1];
 950                         char* pref = (char*)prefix.c_str();
 951                         prefix = ++pref;
 952                         params.pop_front();
 953                         params.pop_front();
 954                 }
 955                 else
 956                 {
 957                         prefix = "";
 958                         command = params[0];
 959                         params.pop_front();
 960                 }
 961
 962                 switch (this->LinkState)
 963                 {
 964                         TreeServer* Node;
 965
 966                         case WAIT_AUTH_1:
 967                                 // Waiting for SERVER command from remote server. Server initiating
 968                                 // the connection sends the first SERVER command, listening server
 969                                 // replies with theirs if its happy, then if the initiator is happy,
 970                                 // it starts to send its net sync, which starts the merge, otherwise
 971                                 // it sends an ERROR.
 972                                 if (command == "SERVER")
 973                                 {
 974                                         return this->Inbound_Server(params);
 975                                 }
 976                                 else if (command == "ERROR")
 977                                 {
 978                                         return this->Error(params);
 979                                 }
 980                         break;
 981                         case WAIT_AUTH_2:
 982                                 // Waiting for start of other side's netmerge to say they liked our
 983                                 // password.
 984                                 if (command == "SERVER")
 985                                 {
 986                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
 987                                         // silently ignore.
 988                                         return true;
 989                                 }
 990                                 else if (command == "BURST")
 991                                 {
 992                                         this->LinkState = CONNECTED;
 993                                         Node = new TreeServer(InboundServerName,InboundDescription,TreeRoot,this);
 994                                         TreeRoot->AddChild(Node);
 995                                         params.clear();
 996                                         params.push_back(InboundServerName);
 997                                         params.push_back("*");
 998                                         params.push_back("1");
 999                                         params.push_back(":"+InboundDescription);
1000                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
1001                                         this->DoBurst(Node);
1002                                 }
1003                                 else if (command == "ERROR")
1004                                 {
1005                                         return this->Error(params);
1006                                 }
1007
1008                         break;
1009                         case LISTENER:
1010                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
1011                                 return false;
1012                         break;
1013                         case CONNECTING:
1014                                 if (command == "SERVER")
1015                                 {
1016                                         // another server we connected to, which was in WAIT_AUTH_1 state,
1017                                         // has just sent us their credentials. If we get this far, theyre
1018                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
1019                                         // if we're happy with this, we should send our netburst which
1020                                         // kickstarts the merge.
1021                                         return this->Outbound_Reply_Server(params);
1022                                 }
1023                                 else if (command == "ERROR")
1024                                 {
1025                                         return this->Error(params);
1026                                 }
1027                         break;
1028                         case CONNECTED:
1029                                 // This is the 'authenticated' state, when all passwords
1030                                 // have been exchanged and anything past this point is taken
1031                                 // as gospel.
1032                                 std::string target = "";
1033                                 if ((command == "NICK") && (params.size() > 1))
1034                                 {
1035                                         return this->IntroduceClient(prefix,params);
1036                                 }
1037                                 else if (command == "FJOIN")
1038                                 {
1039                                         return this->ForceJoin(prefix,params);
1040                                 }
1041                                 else if (command == "SERVER")
1042                                 {
1043                                         return this->RemoteServer(prefix,params);
1044                                 }
1045                                 else if (command == "ERROR")
1046                                 {
1047                                         return this->Error(params);
1048                                 }
1049                                 else if (command == "OPERTYPE")
1050                                 {
1051                                         return this->OperType(prefix,params);
1052                                 }
1053                                 else if (command == "FMODE")
1054                                 {
1055                                         return this->ForceMode(prefix,params);
1056                                 }
1057                                 else if (command == "KILL")
1058                                 {
1059                                         return this->RemoteKill(prefix,params);
1060                                 }
1061                                 else if (command == "FTOPIC")
1062                                 {
1063                                         return this->ForceTopic(prefix,params);
1064                                 }
1065                                 else if (command == "REHASH")
1066                                 {
1067                                         return this->RemoteRehash(prefix,params);
1068                                 }
1069                                 else if (command == "SQUIT")
1070                                 {
1071                                         if (params.size() == 2)
1072                                         {
1073                                                 this->Squit(FindServer(params[0]),params[1]);
1074                                         }
1075                                         return true;
1076                                 }
1077                                 else
1078                                 {
1079                                         // not a special inter-server command.
1080                                         // Emulate the actual user doing the command,
1081                                         // this saves us having a huge ugly parser.
1082                                         userrec* who = Srv->FindNick(prefix);
1083                                         std::string sourceserv = this->myhost;
1084                                         if (this->InboundServerName != "")
1085                                         {
1086                                                 sourceserv = this->InboundServerName;
1087                                         }
1088                                         if (who)
1089                                         {
1090                                                 // its a user
1091                                                 target = who->server;
1092                                                 char* strparams[127];
1093                                                 for (unsigned int q = 0; q < params.size(); q++)
1094                                                 {
1095                                                         strparams[q] = (char*)params[q].c_str();
1096                                                 }
1097                                                 Srv->CallCommandHandler(command, strparams, params.size(), who);
1098                                         }
1099                                         else
1100                                         {
1101                                                 // its not a user. Its either a server, or somethings screwed up.
1102                                                 if (IsServer(prefix))
1103                                                 {
1104                                                         target = Srv->GetServerName();
1105                                                 }
1106                                                 else
1107                                                 {
1108                                                         log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
1109                                                         return true;
1110                                                 }
1111                                         }
1112                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1113
1114                                 }
1115                                 return true;
1116                         break;
1117                 }
1118                 return true;
1119         }
1120
1121         virtual std::string GetName()
1122         {
1123                 std::string sourceserv = this->myhost;
1124                 if (this->InboundServerName != "")
1125                 {
1126                         sourceserv = this->InboundServerName;
1127                 }
1128                 return sourceserv;
1129         }
1130
1131         virtual void OnTimeout()
1132         {
1133                 if (this->LinkState == CONNECTING)
1134                 {
1135                         Srv->SendOpers("*** CONNECT: Connection to \002"+myhost+"\002 timed out.");
1136                 }
1137         }
1138
1139         virtual void OnClose()
1140         {
1141                 // Connection closed.
1142                 // If the connection is fully up (state CONNECTED)
1143                 // then propogate a netsplit to all peers.
1144                 std::string quitserver = this->myhost;
1145                 if (this->InboundServerName != "")
1146                 {
1147                         quitserver = this->InboundServerName;
1148                 }
1149                 TreeServer* s = FindServer(quitserver);
1150                 if (s)
1151                 {
1152                         Squit(s,"Remote host closed the connection");
1153                 }
1154         }
1155
1156         virtual int OnIncomingConnection(int newsock, char* ip)
1157         {
1158                 TreeSocket* s = new TreeSocket(newsock, ip);
1159                 Srv->AddSocket(s);
1160                 return true;
1161         }
1162 };
1163
1164 void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
1165 {
1166         for (unsigned int c = 0; c < list.size(); c++)
1167         {
1168                 if (list[c] == server)
1169                 {
1170                         return;
1171                 }
1172         }
1173         list.push_back(server);
1174 }
1175
1176 // returns a list of DIRECT servernames for a specific channel
1177 std::deque<TreeServer*> GetListOfServersForChannel(chanrec* c)
1178 {
1179         std::deque<TreeServer*> list;
1180         std::vector<char*> *ulist = c->GetUsers();
1181         for (unsigned int i = 0; i < ulist->size(); i++)
1182         {
1183                 char* o = (*ulist)[i];
1184                 userrec* otheruser = (userrec*)o;
1185                 if (std::string(otheruser->server) != Srv->GetServerName())
1186                 {
1187                         TreeServer* best = BestRouteTo(otheruser->server);
1188                         if (best)
1189                                 AddThisServer(best,list);
1190                 }
1191         }
1192         return list;
1193 }
1194
1195 bool DoOneToAllButSenderRaw(std::string data,std::string omit,std::string prefix,std::string command,std::deque<std::string> params)
1196 {
1197         TreeServer* omitroute = BestRouteTo(omit);
1198         if ((command == "NOTICE") || (command == "PRIVMSG"))
1199         {
1200                 if (params.size() >= 2)
1201                 {
1202                         if (*(params[0].c_str()) != '#')
1203                         {
1204                                 // special routing for private messages/notices
1205                                 userrec* d = Srv->FindNick(params[0]);
1206                                 if (d)
1207                                 {
1208                                         std::deque<std::string> par;
1209                                         par.clear();
1210                                         par.push_back(params[0]);
1211                                         par.push_back(":"+params[1]);
1212                                         DoOneToOne(prefix,command,par,d->server);
1213                                         return true;
1214                                 }
1215                         }
1216                         else
1217                         {
1218                                 log(DEBUG,"Channel privmsg going to chan %s",params[0].c_str());
1219                                 chanrec* c = Srv->FindChannel(params[0]);
1220                                 if (c)
1221                                 {
1222                                         std::deque<TreeServer*> list = GetListOfServersForChannel(c);
1223                                         log(DEBUG,"Got a list of %d servers",list.size());
1224                                         for (unsigned int i = 0; i < list.size(); i++)
1225                                         {
1226                                                 TreeSocket* Sock = list[i]->GetSocket();
1227                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
1228                                                 {
1229                                                         log(DEBUG,"Writing privmsg to server %s",list[i]->GetName().c_str());
1230                                                         Sock->WriteLine(data);
1231                                                 }
1232                                         }
1233                                         return true;
1234                                 }
1235                         }
1236                 }
1237         }
1238         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1239         {
1240                 TreeServer* Route = TreeRoot->GetChild(x);
1241                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
1242                 {
1243                         TreeSocket* Sock = Route->GetSocket();
1244                         Sock->WriteLine(data);
1245                 }
1246         }
1247         return true;
1248 }
1249
1250 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> params, std::string omit)
1251 {
1252         TreeServer* omitroute = BestRouteTo(omit);
1253         std::string FullLine = ":" + prefix + " " + command;
1254         for (unsigned int x = 0; x < params.size(); x++)
1255         {
1256                 FullLine = FullLine + " " + params[x];
1257         }
1258         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1259         {
1260                 TreeServer* Route = TreeRoot->GetChild(x);
1261                 // Send the line IF:
1262                 // The route has a socket (its a direct connection)
1263                 // The route isnt the one to be omitted
1264                 // The route isnt the path to the one to be omitted
1265                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
1266                 {
1267                         TreeSocket* Sock = Route->GetSocket();
1268                         Sock->WriteLine(FullLine);
1269                 }
1270         }
1271         return true;
1272 }
1273
1274 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> params)
1275 {
1276         std::string FullLine = ":" + prefix + " " + command;
1277         for (unsigned int x = 0; x < params.size(); x++)
1278         {
1279                 FullLine = FullLine + " " + params[x];
1280         }
1281         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1282         {
1283                 TreeServer* Route = TreeRoot->GetChild(x);
1284                 if (Route->GetSocket())
1285                 {
1286                         TreeSocket* Sock = Route->GetSocket();
1287                         Sock->WriteLine(FullLine);
1288                 }
1289         }
1290         return true;
1291 }
1292
1293 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> params, std::string target)
1294 {
1295         TreeServer* Route = BestRouteTo(target);
1296         if (Route)
1297         {
1298                 std::string FullLine = ":" + prefix + " " + command;
1299                 for (unsigned int x = 0; x < params.size(); x++)
1300                 {
1301                         FullLine = FullLine + " " + params[x];
1302                 }
1303                 if (Route->GetSocket())
1304                 {
1305                         TreeSocket* Sock = Route->GetSocket();
1306                         Sock->WriteLine(FullLine);
1307                 }
1308                 return true;
1309         }
1310         else
1311         {
1312                 return true;
1313         }
1314 }
1315
1316 std::vector<TreeSocket*> Bindings;
1317
1318 void ReadConfiguration(bool rebind)
1319 {
1320         if (rebind)
1321         {
1322                 for (int j =0; j < Conf->Enumerate("bind"); j++)
1323                 {
1324                         std::string Type = Conf->ReadValue("bind","type",j);
1325                         std::string IP = Conf->ReadValue("bind","address",j);
1326                         long Port = Conf->ReadInteger("bind","port",j,true);
1327                         if (Type == "servers")
1328                         {
1329                                 if (IP == "*")
1330                                 {
1331                                         IP = "";
1332                                 }
1333                                 TreeSocket* listener = new TreeSocket(IP.c_str(),Port,true,10);
1334                                 if (listener->GetState() == I_LISTENING)
1335                                 {
1336                                         Srv->AddSocket(listener);
1337                                         Bindings.push_back(listener);
1338                                 }
1339                                 else
1340                                 {
1341                                         log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
1342                                         listener->Close();
1343                                         delete listener;
1344                                 }
1345                         }
1346                 }
1347         }
1348         LinkBlocks.clear();
1349         for (int j =0; j < Conf->Enumerate("link"); j++)
1350         {
1351                 Link L;
1352                 L.Name = Conf->ReadValue("link","name",j);
1353                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
1354                 L.Port = Conf->ReadInteger("link","port",j,true);
1355                 L.SendPass = Conf->ReadValue("link","sendpass",j);
1356                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
1357                 LinkBlocks.push_back(L);
1358                 log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
1359         }
1360 }
1361
1362
1363 class ModuleSpanningTree : public Module
1364 {
1365         std::vector<TreeSocket*> Bindings;
1366         int line;
1367
1368  public:
1369
1370         ModuleSpanningTree()
1371         {
1372                 Srv = new Server;
1373                 Conf = new ConfigReader;
1374                 Bindings.clear();
1375
1376                 // Create the root of the tree
1377                 TreeRoot = new TreeServer(Srv->GetServerName(),Srv->GetServerDescription());
1378
1379                 ReadConfiguration(true);
1380         }
1381
1382         void ShowLinks(TreeServer* Current, userrec* user, int hops)
1383         {
1384                 std::string Parent = TreeRoot->GetName();
1385                 if (Current->GetParent())
1386                 {
1387                         Parent = Current->GetParent()->GetName();
1388                 }
1389                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1390                 {
1391                         ShowLinks(Current->GetChild(q),user,hops+1);
1392                 }
1393                 WriteServ(user->fd,"364 %s %s %s :%d %s",user->nick,Current->GetName().c_str(),Parent.c_str(),hops,Current->GetDesc().c_str());
1394         }
1395
1396         void HandleLinks(char** parameters, int pcnt, userrec* user)
1397         {
1398                 ShowLinks(TreeRoot,user,0);
1399                 WriteServ(user->fd,"365 %s * :End of /LINKS list.",user->nick);
1400                 return;
1401         }
1402
1403         void HandleLusers(char** parameters, int pcnt, userrec* user)
1404         {
1405                 return;
1406         }
1407
1408         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
1409
1410         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80])
1411         {
1412                 if (line < 128)
1413                 {
1414                         for (int t = 0; t < depth; t++)
1415                         {
1416                                 matrix[line][t] = ' ';
1417                         }
1418                         strlcpy(&matrix[line][depth],Current->GetName().c_str(),80);
1419                         line++;
1420                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
1421                         {
1422                                 ShowMap(Current->GetChild(q),user,depth+2,matrix);
1423                         }
1424                 }
1425         }
1426
1427         // Ok, prepare to be confused.
1428         // After much mulling over how to approach this, it struck me that
1429         // the 'usual' way of doing a /MAP isnt the best way. Instead of
1430         // keeping track of a ton of ascii characters, and line by line
1431         // under recursion working out where to place them using multiplications
1432         // and divisons, we instead render the map onto a backplane of characters
1433         // (a character matrix), then draw the branches as a series of "L" shapes
1434         // from the nodes. This is not only friendlier on CPU it uses less stack.
1435
1436         void HandleMap(char** parameters, int pcnt, userrec* user)
1437         {
1438                 // This array represents a virtual screen which we will
1439                 // "scratch" draw to, as the console device of an irc
1440                 // client does not provide for a proper terminal.
1441                 char matrix[128][80];
1442                 for (unsigned int t = 0; t < 128; t++)
1443                 {
1444                         matrix[t][0] = '\0';
1445                 }
1446                 line = 0;
1447                 // The only recursive bit is called here.
1448                 ShowMap(TreeRoot,user,0,matrix);
1449                 // Process each line one by one. The algorithm has a limit of
1450                 // 128 servers (which is far more than a spanning tree should have
1451                 // anyway, so we're ok). This limit can be raised simply by making
1452                 // the character matrix deeper, 128 rows taking 10k of memory.
1453                 for (int l = 1; l < line; l++)
1454                 {
1455                         // scan across the line looking for the start of the
1456                         // servername (the recursive part of the algorithm has placed
1457                         // the servers at indented positions depending on what they
1458                         // are related to)
1459                         int first_nonspace = 0;
1460                         while (matrix[l][first_nonspace] == ' ')
1461                         {
1462                                 first_nonspace++;
1463                         }
1464                         first_nonspace--;
1465                         // Draw the `- (corner) section: this may be overwritten by
1466                         // another L shape passing along the same vertical pane, becoming
1467                         // a |- (branch) section instead.
1468                         matrix[l][first_nonspace] = '-';
1469                         matrix[l][first_nonspace-1] = '`';
1470                         int l2 = l - 1;
1471                         // Draw upwards until we hit the parent server, causing possibly
1472                         // other corners (`-) to become branches (|-)
1473                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
1474                         {
1475                                 matrix[l2][first_nonspace-1] = '|';
1476                                 l2--;
1477                         }
1478                 }
1479                 // dump the whole lot to the user. This is the easy bit, honest.
1480                 for (int t = 0; t < line; t++)
1481                 {
1482                         WriteServ(user->fd,"006 %s :%s",user->nick,&matrix[t][0]);
1483                 }
1484                 WriteServ(user->fd,"007 %s :End of /MAP",user->nick);
1485                 return;
1486         }
1487
1488         int HandleSquit(char** parameters, int pcnt, userrec* user)
1489         {
1490                 return 1;
1491         }
1492
1493         int HandleConnect(char** parameters, int pcnt, userrec* user)
1494         {
1495                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
1496                 {
1497                         if (Srv->MatchText(x->Name.c_str(),parameters[0]))
1498                         {
1499                                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: Connecting to server: %s (%s:%d)",user->nick,x->Name.c_str(),x->IPAddr.c_str(),x->Port);
1500                                 TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name);
1501                                 Srv->AddSocket(newsocket);
1502                                 return 1;
1503                         }
1504                 }
1505                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: No matching server could be found in the config file.",user->nick);
1506                 return 1;
1507         }
1508
1509         virtual int OnPreCommand(std::string command, char **parameters, int pcnt, userrec *user)
1510         {
1511                 if (command == "CONNECT")
1512                 {
1513                         return this->HandleConnect(parameters,pcnt,user);
1514                 }
1515                 else if (command == "SQUIT")
1516                 {
1517                         return this->HandleSquit(parameters,pcnt,user);
1518                 }
1519                 else if (command == "MAP")
1520                 {
1521                         this->HandleMap(parameters,pcnt,user);
1522                         return 1;
1523                 }
1524                 else if (command == "LUSERS")
1525                 {
1526                         this->HandleLusers(parameters,pcnt,user);
1527                         return 1;
1528                 }
1529                 else if (command == "LINKS")
1530                 {
1531                         this->HandleLinks(parameters,pcnt,user);
1532                         return 1;
1533                 }
1534                 else if (Srv->IsValidModuleCommand(command, pcnt, user))
1535                 {
1536                         // this bit of code cleverly routes all module commands
1537                         // to all remote severs *automatically* so that modules
1538                         // can just handle commands locally, without having
1539                         // to have any special provision in place for remote
1540                         // commands and linking protocols.
1541                         std::deque<std::string> params;
1542                         params.clear();
1543                         for (int j = 0; j < pcnt; j++)
1544                         {
1545                                 if (strchr(parameters[j],' '))
1546                                 {
1547                                         params.push_back(":" + std::string(parameters[j]));
1548                                 }
1549                                 else
1550                                 {
1551                                         params.push_back(std::string(parameters[j]));
1552                                 }
1553                         }
1554                         DoOneToMany(user->nick,command,params);
1555                 }
1556                 return 0;
1557         }
1558
1559         virtual void OnGetServerDescription(std::string servername,std::string &description)
1560         {
1561                 TreeServer* s = FindServer(servername);
1562                 if (s)
1563                 {
1564                         description = s->GetDesc();
1565                 }
1566         }
1567
1568         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
1569         {
1570                 if (std::string(source->server) == Srv->GetServerName())
1571                 {
1572                         std::deque<std::string> params;
1573                         params.push_back(dest->nick);
1574                         params.push_back(channel->name);
1575                         DoOneToMany(source->nick,"INVITE",params);
1576                 }
1577         }
1578
1579         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, std::string topic)
1580         {
1581                 std::deque<std::string> params;
1582                 params.push_back(chan->name);
1583                 params.push_back(":"+topic);
1584                 DoOneToMany(user->nick,"TOPIC",params);
1585         }
1586
1587         virtual void OnUserNotice(userrec* user, void* dest, int target_type, std::string text)
1588         {
1589                 if (target_type == TYPE_USER)
1590                 {
1591                         userrec* d = (userrec*)dest;
1592                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
1593                         {
1594                                 std::deque<std::string> params;
1595                                 params.clear();
1596                                 params.push_back(d->nick);
1597                                 params.push_back(":"+text);
1598                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
1599                         }
1600                 }
1601                 else
1602                 {
1603                         if (std::string(user->server) == Srv->GetServerName())
1604                         {
1605                                 chanrec *c = (chanrec*)dest;
1606                                 std::deque<TreeServer*> list = GetListOfServersForChannel(c);
1607                                 for (unsigned int i = 0; i < list.size(); i++)
1608                                 {
1609                                         TreeSocket* Sock = list[i]->GetSocket();
1610                                         if (Sock)
1611                                                 Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+std::string(c->name)+" :"+text);
1612                                 }
1613                         }
1614                 }
1615         }
1616
1617         virtual void OnUserMessage(userrec* user, void* dest, int target_type, std::string text)
1618         {
1619                 if (target_type == TYPE_USER)
1620                 {
1621                         // route private messages which are targetted at clients only to the server
1622                         // which needs to receive them
1623                         userrec* d = (userrec*)dest;
1624                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
1625                         {
1626                                 std::deque<std::string> params;
1627                                 params.clear();
1628                                 params.push_back(d->nick);
1629                                 params.push_back(":"+text);
1630                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
1631                         }
1632                 }
1633                 else
1634                 {
1635                         if (std::string(user->server) == Srv->GetServerName())
1636                         {
1637                                 chanrec *c = (chanrec*)dest;
1638                                 std::deque<TreeServer*> list = GetListOfServersForChannel(c);
1639                                 for (unsigned int i = 0; i < list.size(); i++)
1640                                 {
1641                                         TreeSocket* Sock = list[i]->GetSocket();
1642                                         if (Sock)
1643                                                 Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+std::string(c->name)+" :"+text);
1644                                 }
1645                         }
1646                 }
1647         }
1648
1649         virtual void OnUserJoin(userrec* user, chanrec* channel)
1650         {
1651                 // Only do this for local users
1652                 if (std::string(user->server) == Srv->GetServerName())
1653                 {
1654                         std::deque<std::string> params;
1655                         params.clear();
1656                         params.push_back(channel->name);
1657                         if (*channel->key)
1658                         {
1659                                 // if the channel has a key, force the join by emulating the key.
1660                                 params.push_back(channel->key);
1661                         }
1662                         DoOneToMany(user->nick,"JOIN",params);
1663                 }
1664         }
1665
1666         virtual void OnUserPart(userrec* user, chanrec* channel)
1667         {
1668                 if (std::string(user->server) == Srv->GetServerName())
1669                 {
1670                         std::deque<std::string> params;
1671                         params.clear();
1672                         params.push_back(channel->name);
1673                         DoOneToMany(user->nick,"PART",params);
1674                 }
1675         }
1676
1677         virtual void OnUserConnect(userrec* user)
1678         {
1679                 char agestr[MAXBUF];
1680                 if (std::string(user->server) == Srv->GetServerName())
1681                 {
1682                         std::deque<std::string> params;
1683                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
1684                         params.clear();
1685                         params.push_back(agestr);
1686                         params.push_back(user->nick);
1687                         params.push_back(user->host);
1688                         params.push_back(user->dhost);
1689                         params.push_back(user->ident);
1690                         params.push_back("+"+std::string(user->modes));
1691                         params.push_back(user->ip);
1692                         params.push_back(":"+std::string(user->fullname));
1693                         DoOneToMany(Srv->GetServerName(),"NICK",params);
1694                 }
1695         }
1696
1697         virtual void OnUserQuit(userrec* user, std::string reason)
1698         {
1699                 if (std::string(user->server) == Srv->GetServerName())
1700                 {
1701                         std::deque<std::string> params;
1702                         params.push_back(":"+reason);
1703                         DoOneToMany(user->nick,"QUIT",params);
1704                 }
1705         }
1706
1707         virtual void OnUserPostNick(userrec* user, std::string oldnick)
1708         {
1709                 if (std::string(user->server) == Srv->GetServerName())
1710                 {
1711                         std::deque<std::string> params;
1712                         params.push_back(user->nick);
1713                         DoOneToMany(oldnick,"NICK",params);
1714                 }
1715         }
1716
1717         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, std::string reason)
1718         {
1719                 if (std::string(source->server) == Srv->GetServerName())
1720                 {
1721                         std::deque<std::string> params;
1722                         params.push_back(chan->name);
1723                         params.push_back(user->nick);
1724                         params.push_back(":"+reason);
1725                         DoOneToMany(source->nick,"KICK",params);
1726                 }
1727         }
1728
1729         virtual void OnRemoteKill(userrec* source, userrec* dest, std::string reason)
1730         {
1731                 std::deque<std::string> params;
1732                 params.push_back(dest->nick);
1733                 params.push_back(":"+reason);
1734                 DoOneToMany(source->nick,"KILL",params);
1735         }
1736
1737         virtual void OnRehash(std::string parameter)
1738         {
1739                 if (parameter != "")
1740                 {
1741                         std::deque<std::string> params;
1742                         params.push_back(parameter);
1743                         DoOneToMany(Srv->GetServerName(),"REHASH",params);
1744                         // check for self
1745                         if (Srv->MatchText(Srv->GetServerName(),parameter))
1746                         {
1747                                 Srv->SendOpers("*** Remote rehash initiated from server \002"+Srv->GetServerName()+"\002.");
1748                                 Srv->RehashServer();
1749                         }
1750                 }
1751                 ReadConfiguration(false);
1752         }
1753
1754         // note: the protocol does not allow direct umode +o except
1755         // via NICK with 8 params. sending OPERTYPE infers +o modechange
1756         // locally.
1757         virtual void OnOper(userrec* user, std::string opertype)
1758         {
1759                 if (std::string(user->server) == Srv->GetServerName())
1760                 {
1761                         std::deque<std::string> params;
1762                         params.push_back(opertype);
1763                         DoOneToMany(user->nick,"OPERTYPE",params);
1764                 }
1765         }
1766
1767         virtual void OnMode(userrec* user, void* dest, int target_type, std::string text)
1768         {
1769                 if (std::string(user->server) == Srv->GetServerName())
1770                 {
1771                         if (target_type == TYPE_USER)
1772                         {
1773                                 userrec* u = (userrec*)dest;
1774                                 std::deque<std::string> params;
1775                                 params.push_back(u->nick);
1776                                 params.push_back(text);
1777                                 DoOneToMany(user->nick,"MODE",params);
1778                         }
1779                         else
1780                         {
1781                                 chanrec* c = (chanrec*)dest;
1782                                 std::deque<std::string> params;
1783                                 params.push_back(c->name);
1784                                 params.push_back(text);
1785                                 DoOneToMany(user->nick,"MODE",params);
1786                         }
1787                 }
1788         }
1789
1790         virtual void ProtoSendMode(void* opaque, int target_type, void* target, std::string modeline)
1791         {
1792                 TreeSocket* s = (TreeSocket*)opaque;
1793                 if (target)
1794                 {
1795                         if (target_type == TYPE_USER)
1796                         {
1797                                 userrec* u = (userrec*)target;
1798                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+u->nick+" "+modeline);
1799                         }
1800                         else
1801                         {
1802                                 chanrec* c = (chanrec*)target;
1803                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+modeline);
1804                         }
1805                 }
1806         }
1807
1808         virtual ~ModuleSpanningTree()
1809         {
1810                 delete Srv;
1811         }
1812
1813         virtual Version GetVersion()
1814         {
1815                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
1816         }
1817 };
1818
1819
1820 class ModuleSpanningTreeFactory : public ModuleFactory
1821 {
1822  public:
1823         ModuleSpanningTreeFactory()
1824         {
1825         }
1826
1827         ~ModuleSpanningTreeFactory()
1828         {
1829         }
1830
1831         virtual Module * CreateModule()
1832         {
1833                 TreeProtocolModule = new ModuleSpanningTree;
1834                 return TreeProtocolModule;
1835         }
1836
1837 };
1838
1839
1840 extern "C" void * init_module( void )
1841 {
1842         return new ModuleSpanningTreeFactory;
1843 }
1844