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         nspace::hash_map<std::string,std::string> replacements;
 310
 311  public:
 312
 313         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime)
 314                 : InspSocket(host, port, listening, maxtime)
 315         {
 316                 myhost = host;
 317                 this->LinkState = LISTENER;
 318         }
 319
 320         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 321                 : InspSocket(host, port, listening, maxtime)
 322         {
 323                 myhost = ServerName;
 324                 this->LinkState = CONNECTING;
 325         }
 326
 327         TreeSocket(int newfd, char* ip)
 328                 : InspSocket(newfd, ip)
 329         {
 330                 this->LinkState = WAIT_AUTH_1;
 331         }
 332
 333         virtual bool OnConnected()
 334         {
 335                 if (this->LinkState == CONNECTING)
 336                 {
 337                         Srv->SendOpers("*** Connection to "+myhost+"["+this->GetIP()+"] established.");
 338                         // we should send our details here.
 339                         // if the other side is satisfied, they send theirs.
 340                         // we do not need to change state here.
 341                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 342                         {
 343                                 if (x->Name == this->myhost)
 344                                 {
 345                                         // found who we're supposed to be connecting to, send the neccessary gubbins.
 346                                         this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 347                                         return true;
 348                                 }
 349                         }
 350                 }
 351                 return true;
 352         }
 353
 354         virtual void OnError(InspSocketError e)
 355         {
 356         }
 357
 358         virtual int OnDisconnect()
 359         {
 360                 return true;
 361         }
 362
 363         // recursively send the server tree with distances as hops
 364         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 365         {
 366                 char command[1024];
 367                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 368                 {
 369                         TreeServer* recursive_server = Current->GetChild(q);
 370                         if (recursive_server != s)
 371                         {
 372                                 // :source.server SERVER server.name hops :Description
 373                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 374                                 this->WriteLine(command);
 375                                 // down to next level
 376                                 this->SendServers(recursive_server, s, hops+1);
 377                         }
 378                 }
 379         }
 380
 381         void SquitServer(TreeServer* Current)
 382         {
 383                 // recursively squit the servers attached to 'Current'
 384                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 385                 {
 386                         TreeServer* recursive_server = Current->GetChild(q);
 387                         this->SquitServer(recursive_server);
 388                 }
 389                 // Now we've whacked the kids, whack self
 390                 num_lost_servers++;
 391                 bool quittingpeople = true;
 392                 while (quittingpeople)
 393                 {
 394                         quittingpeople = false;
 395                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 396                         {
 397                                 if (!strcasecmp(u->second->server,Current->GetName().c_str()))
 398                                 {
 399                                         Srv->QuitUser(u->second,Current->GetName()+" "+std::string(Srv->GetServerName()));
 400                                         num_lost_users++;
 401                                         quittingpeople = true;
 402                                         break;
 403                                 }
 404                         }
 405                 }
 406         }
 407
 408         void Squit(TreeServer* Current,std::string reason)
 409         {
 410                 if (Current)
 411                 {
 412                         std::deque<std::string> params;
 413                         params.push_back(Current->GetName());
 414                         params.push_back(":"+reason);
 415                         DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
 416                         if (Current->GetParent() == TreeRoot)
 417                         {
 418                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
 419                         }
 420                         else
 421                         {
 422                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
 423                         }
 424                         num_lost_servers = 0;
 425                         num_lost_users = 0;
 426                         SquitServer(Current);
 427                         Current->Tidy();
 428                         Current->GetParent()->DelChild(Current);
 429                         delete Current;
 430                         WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
 431                 }
 432                 else
 433                 {
 434                         log(DEFAULT,"Squit from unknown server");
 435                 }
 436         }
 437
 438         bool ForceMode(std::string source, std::deque<std::string> params)
 439         {
 440                 userrec* who = new userrec;
 441                 who->fd = FD_MAGIC_NUMBER;
 442                 if (params.size() < 2)
 443                         return true;
 444                 char* modelist[255];
 445                 for (unsigned int q = 0; q < params.size(); q++)
 446                 {
 447                         modelist[q] = (char*)params[q].c_str();
 448                 }
 449                 Srv->SendMode(modelist,params.size(),who);
 450                 DoOneToAllButSender(source,"FMODE",params,source);
 451                 delete who;
 452                 return true;
 453         }
 454
 455         bool ForceTopic(std::string source, std::deque<std::string> params)
 456         {
 457                 // FTOPIC %s %lu %s :%s
 458                 if (params.size() != 4)
 459                         return true;
 460                 std::string channel = params[0];
 461                 time_t ts = atoi(params[1].c_str());
 462                 std::string setby = params[2];
 463                 std::string topic = params[3];
 464
 465                 chanrec* c = Srv->FindChannel(channel);
 466                 if (c)
 467                 {
 468                         if ((ts >= c->topicset) || (!*c->topic))
 469                         {
 470                                 strlcpy(c->topic,topic.c_str(),MAXTOPIC);
 471                                 strlcpy(c->setby,setby.c_str(),NICKMAX);
 472                                 c->topicset = ts;
 473                                 WriteChannelWithServ((char*)source.c_str(), c, "TOPIC %s :%s", c->name, c->topic);
 474                         }
 475
 476                 }
 477
 478                 // all done, send it on its way
 479                 params[3] = ":" + params[3];
 480                 DoOneToAllButSender(source,"FTOPIC",params,source);
 481
 482                 return true;
 483         }
 484
 485         bool ForceJoin(std::string source, std::deque<std::string> params)
 486         {
 487                 if (params.size() < 3)
 488                         return true;
 489
 490                 char first[MAXBUF];
 491                 char modestring[MAXBUF];
 492                 char* mode_users[127];
 493                 mode_users[0] = first;
 494                 mode_users[1] = modestring;
 495                 strcpy(mode_users[1],"+");
 496                 unsigned int modectr = 2;
 497
 498                 userrec* who = NULL;
 499                 std::string channel = params[0];
 500                 time_t TS = atoi(params[1].c_str());
 501                 char* key = "";
 502
 503                 chanrec* chan = Srv->FindChannel(channel);
 504                 if (chan)
 505                 {
 506                         key = chan->key;
 507                 }
 508                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
 509
 510                 // default is a high value, which if we dont have this
 511                 // channel will let the other side apply their modes.
 512                 time_t ourTS = time(NULL)+20;
 513                 chanrec* us = Srv->FindChannel(channel);
 514                 if (us)
 515                 {
 516                         ourTS = us->age;
 517                 }
 518
 519                 log(DEBUG,"FJOIN detected, our TS=%lu, their TS=%lu",ourTS,TS);
 520
 521                 // corect all nicknames that have been force changed due to collision
 522                 for (unsigned int usernum = 2; usernum < params.size(); usernum++)
 523                 {
 524                         log(DEBUG,"Collision translation: In=%s",params[usernum].c_str());
 525                         char* usr = (char*)params[usernum].c_str();
 526                         char permissions = *usr;
 527                         switch (permissions)
 528                         {
 529                                 case '@':
 530                                 case '%':
 531                                 case '+':
 532                                         usr++;
 533                                 break;
 534                         }
 535                         std::string nickname = this->GetFJoinReplacement(usr);
 536                         if ((permissions == '@') || (permissions == '%') || (permissions == '+'))
 537                         {
 538                                 nickname = permissions + nickname;
 539                         }
 540                         params[usernum] = nickname;
 541                         log(DEBUG,"Collision translation: Out=%s",params[usernum].c_str());
 542                 }
 543
 544                 // do this first, so our mode reversals are correctly received by other servers
 545                 // if there is a TS collision.
 546                 DoOneToAllButSender(source,"FJOIN",params,source);
 547
 548                 for (unsigned int usernum = 2; usernum < params.size(); usernum++)
 549                 {
 550                         // process one channel at a time, applying modes.
 551                         char* usr = (char*)params[usernum].c_str();
 552                         std::string nickname;
 553                         char permissions = *usr;
 554                         switch (permissions)
 555                         {
 556                                 case '@':
 557                                         usr++;
 558                                         mode_users[modectr++] = usr;
 559                                         strlcat(modestring,"o",MAXBUF);
 560                                 break;
 561                                 case '%':
 562                                         usr++;
 563                                         mode_users[modectr++] = usr;
 564                                         strlcat(modestring,"h",MAXBUF);
 565                                 break;
 566                                 case '+':
 567                                         usr++;
 568                                         mode_users[modectr++] = usr;
 569                                         strlcat(modestring,"v",MAXBUF);
 570                                 break;
 571                         }
 572                         who = Srv->FindNick(usr);
 573                         if (who)
 574                         {
 575                                 Srv->JoinUserToChannel(who,channel,key);
 576                                 if (modectr >= (MAXMODES-1))
 577                                 {
 578                                         // theres a mode for this user. push them onto the mode queue, and flush it
 579                                         // if there are more than MAXMODES to go.
 580                                         if (ourTS >= TS)
 581                                         {
 582                                                 log(DEBUG,"Our our channel newer than theirs, accepting their modes");
 583                                                 Srv->SendMode(mode_users,modectr,who);
 584                                         }
 585                                         else
 586                                         {
 587                                                 log(DEBUG,"Their channel newer than ours, bouncing their modes");
 588                                                 // bouncy bouncy!
 589                                                 std::deque<std::string> params;
 590                                                 // modes are now being UNSET...
 591                                                 *mode_users[1] = '-';
 592                                                 for (unsigned int x = 0; x < modectr; x++)
 593                                                 {
 594                                                         params.push_back(mode_users[x]);
 595                                                 }
 596                                                 // tell everyone to bounce the modes. bad modes, bad!
 597                                                 DoOneToMany(Srv->GetServerName(),"FMODE",params);
 598                                         }
 599                                         strcpy(mode_users[1],"+");
 600                                         modectr = 2;
 601                                 }
 602                         }
 603                 }
 604                 // there werent enough modes built up to flush it during FJOIN,
 605                 // or, there are a number left over. flush them out.
 606                 if ((modectr > 2) && (who))
 607                 {
 608                         if (ourTS >= TS)
 609                         {
 610                                 log(DEBUG,"Our our channel newer than theirs, accepting their modes");
 611                                 Srv->SendMode(mode_users,modectr,who);
 612                         }
 613                         else
 614                         {
 615                                 log(DEBUG,"Their channel newer than ours, bouncing their modes");
 616                                 std::deque<std::string> params;
 617                                 *mode_users[1] = '-';
 618                                 for (unsigned int x = 0; x < modectr; x++)
 619                                 {
 620                                         params.push_back(mode_users[x]);
 621                                 }
 622                                 DoOneToMany(Srv->GetServerName(),"FMODE",params);
 623                         }
 624                 }
 625                 return true;
 626         }
 627
 628         bool ClearFJoinReplacement()
 629         {
 630                 replacements.clear();
 631                 return true;
 632         }
 633
 634         void AddFJoinReplacement(std::string oldnick, std::string newnick)
 635         {
 636                 nspace::hash_map<std::string,std::string>::iterator iter = replacements.find(oldnick);
 637                 if (iter != replacements.end())
 638                         return;
 639                 replacements[oldnick] = newnick;
 640         }
 641
 642         std::string GetFJoinReplacement(std::string nickname)
 643         {
 644                 nspace::hash_map<std::string,std::string>::iterator iter = replacements.find(nickname);
 645                 if (iter != replacements.end())
 646                 {
 647                         return iter->second;
 648                 }
 649                 else
 650                 {
 651                         return nickname;
 652                 }
 653         }
 654
 655         bool IntroduceClient(std::string source, std::deque<std::string> params)
 656         {
 657                 if (params.size() < 8)
 658                         return true;
 659                 // NICK age nick host dhost ident +modes ip :gecos
 660                 //       0   1    2    3      4     5    6   7
 661                 std::string nick = params[1];
 662                 std::string host = params[2];
 663                 std::string dhost = params[3];
 664                 std::string ident = params[4];
 665                 time_t age = atoi(params[0].c_str());
 666                 std::string modes = params[5];
 667                 if (*(modes.c_str()) == '+')
 668                 {
 669                         char* m = (char*)modes.c_str();
 670                         m++;
 671                         modes = m;
 672                 }
 673                 std::string ip = params[6];
 674                 std::string gecos = params[7];
 675                 char* tempnick = (char*)nick.c_str();
 676                 log(DEBUG,"Introduce client %s!%s@%s",tempnick,ident.c_str(),host.c_str());
 677
 678                 user_hash::iterator iter;
 679                 iter = clientlist.find(tempnick);
 680                 if (iter != clientlist.end())
 681                 {
 682                         // nick collision
 683                         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);
 684                         if (iter->second->age >= age)
 685                         {
 686                                 // ours is older than theirs, ours stays. Set a new nick here, send SVSNICK
 687                                 params[1] = nick = "Guest0";
 688                                 this->WriteLine(":"+Srv->GetServerName()+" FNICK "+tempnick+" "+nick);
 689                                 // temporarily (until end of burst) we auto-replace occurances of the old nick with the new nick
 690                                 AddFJoinReplacement(tempnick,nick);
 691                         }
 692                         else
 693                         {
 694                                 // the other end will be changing our nick to the guest nick.
 695                                 // Pause and wait for their FNICK.
 696                                 SyncPaused = true;
 697                         }
 698                 }
 699
 700                 clientlist[tempnick] = new userrec();
 701                 clientlist[tempnick]->fd = FD_MAGIC_NUMBER;
 702                 strlcpy(clientlist[tempnick]->nick, tempnick,NICKMAX);
 703                 strlcpy(clientlist[tempnick]->host, host.c_str(),160);
 704                 strlcpy(clientlist[tempnick]->dhost, dhost.c_str(),160);
 705                 clientlist[tempnick]->server = (char*)FindServerNamePtr(source.c_str());
 706                 strlcpy(clientlist[tempnick]->ident, ident.c_str(),IDENTMAX);
 707                 strlcpy(clientlist[tempnick]->fullname, gecos.c_str(),MAXGECOS);
 708                 clientlist[tempnick]->registered = 7;
 709                 clientlist[tempnick]->signon = age;
 710                 strlcpy(clientlist[tempnick]->ip,ip.c_str(),16);
 711                 for (int i = 0; i < MAXCHANS; i++)
 712                 {
 713                         clientlist[tempnick]->chans[i].channel = NULL;
 714                         clientlist[tempnick]->chans[i].uc_modes = 0;
 715                 }
 716                 params[7] = ":" + params[7];
 717                 DoOneToAllButSender(source,"NICK",params,source);
 718                 return true;
 719         }
 720
 721         void SendFJoins(TreeServer* Current, chanrec* c)
 722         {
 723                 char list[MAXBUF];
 724                 snprintf(list,MAXBUF,":%s FJOIN %s %lu",Srv->GetServerName().c_str(),c->name,(unsigned long)c->age);
 725                 std::vector<char*> *ulist = c->GetUsers();
 726                 for (unsigned int i = 0; i < ulist->size(); i++)
 727                 {
 728                         char* o = (*ulist)[i];
 729                         userrec* otheruser = (userrec*)o;
 730                         strlcat(list," ",MAXBUF);
 731                         strlcat(list,cmode(otheruser,c),MAXBUF);
 732                         strlcat(list,otheruser->nick,MAXBUF);
 733                         if (strlen(list)>(480-NICKMAX))
 734                         {
 735                                 this->WriteLine(list);
 736                                 snprintf(list,MAXBUF,":%s FJOIN %s %lu",Srv->GetServerName().c_str(),c->name,(unsigned long)c->age);
 737                         }
 738                 }
 739                 if (list[strlen(list)-1] != ':')
 740                 {
 741                         this->WriteLine(list);
 742                 }
 743         }
 744
 745         void SendChannelModes(TreeServer* Current)
 746         {
 747                 char data[MAXBUF];
 748                 for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 749                 {
 750                         SendFJoins(Current, c->second);
 751                         snprintf(data,MAXBUF,":%s FMODE %s +%s",Srv->GetServerName().c_str(),c->second->name,chanmodes(c->second));
 752                         this->WriteLine(data);
 753                         if (*c->second->topic)
 754                         {
 755                                 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);
 756                                 this->WriteLine(data);
 757                         }
 758                         for (BanList::iterator b = c->second->bans.begin(); b != c->second->bans.end(); b++)
 759                         {
 760                                 snprintf(data,MAXBUF,":%s FMODE %s +b %s",Srv->GetServerName().c_str(),c->second->name,b->data);
 761                                 this->WriteLine(data);
 762                         }
 763                         FOREACH_MOD OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this);
 764                 }
 765         }
 766
 767         // send all users and their channels
 768         void SendUsers(TreeServer* Current)
 769         {
 770                 char data[MAXBUF];
 771                 for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 772                 {
 773                         if (u->second->registered == 7)
 774                         {
 775                                 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);
 776                                 this->WriteLine(data);
 777                                 if (strchr(u->second->modes,'o'))
 778                                 {
 779                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
 780                                 }
 781                                 //char* chl = chlist(u->second,u->second);
 782                                 //if (*chl)
 783                                 //{
 784                                 //      this->WriteLine(":"+std::string(u->second->nick)+" FJOIN "+std::string(chl));
 785                                 //}
 786                                 FOREACH_MOD OnSyncUser(u->second,(Module*)TreeProtocolModule,(void*)this);
 787                         }
 788                 }
 789         }
 790
 791         void DoBurst(TreeServer* s)
 792         {
 793                 Srv->SendOpers("*** Bursting to "+s->GetName()+".");
 794                 this->WriteLine("BURST");
 795                 // Send server tree
 796                 this->SendServers(TreeRoot,s,1);
 797                 // Send users and their channels
 798                 this->SendUsers(s);
 799                 this->WriteLine("ENDUSERS");
 800                 this->SendChannelModes(s);
 801                 this->WriteLine("ENDBURST");
 802         }
 803
 804         virtual bool OnDataReady()
 805         {
 806                 char* data = this->Read();
 807                 if (data)
 808                 {
 809                         this->in_buffer += data;
 810                         while (in_buffer.find("\n") != std::string::npos)
 811                         {
 812                                 char* line = (char*)in_buffer.c_str();
 813                                 std::string ret = "";
 814                                 while ((*line != '\n') && (strlen(line)))
 815                                 {
 816                                         ret = ret + *line;
 817                                         line++;
 818                                 }
 819                                 if ((*line == '\n') || (*line == '\r'))
 820                                         line++;
 821                                 in_buffer = line;
 822                                 if (!this->ProcessLine(ret))
 823                                 {
 824                                         return false;
 825                                 }
 826                         }
 827                 }
 828                 return (data != NULL);
 829         }
 830
 831         int WriteLine(std::string line)
 832         {
 833                 return this->Write(line + "\r\n");
 834         }
 835
 836         bool Error(std::deque<std::string> params)
 837         {
 838                 if (params.size() < 1)
 839                         return false;
 840                 std::string Errmsg = params[0];
 841                 std::string SName = myhost;
 842                 if (InboundServerName != "")
 843                 {
 844                         SName = InboundServerName;
 845                 }
 846                 Srv->SendOpers("*** ERROR from "+SName+": "+Errmsg);
 847                 // we will return false to cause the socket to close.
 848                 return false;
 849         }
 850
 851         bool OperType(std::string prefix, std::deque<std::string> params)
 852         {
 853                 if (params.size() != 1)
 854                         return true;
 855                 std::string opertype = params[0];
 856                 userrec* u = Srv->FindNick(prefix);
 857                 if (u)
 858                 {
 859                         strlcpy(u->oper,opertype.c_str(),NICKMAX);
 860                         if (!strchr(u->modes,'o'))
 861                         {
 862                                 strcat(u->modes,"o");
 863                         }
 864                         DoOneToAllButSender(u->server,"OPERTYPE",params,u->server);
 865                 }
 866                 return true;
 867         }
 868
 869         bool ForceNick(std::string prefix, std::deque<std::string> params)
 870         {
 871                 if (params.size() != 2)
 872                         return true;
 873                 std::string oldnick = params[0];
 874                 std::string newnick = params[1];
 875                 userrec* u = Srv->FindNick(oldnick);
 876                 if (u)
 877                 {
 878                         Srv->ChangeUserNick(u,newnick);
 879                         DoOneToAllButSender(prefix,"FNICK",params,prefix);
 880                 }
 881                 SyncPaused = false;
 882                 return true;
 883         }
 884
 885         bool RemoteRehash(std::string prefix, std::deque<std::string> params)
 886         {
 887                 if (params.size() < 1)
 888                         return true;
 889                 std::string servermask = params[0];
 890                 if (Srv->MatchText(Srv->GetServerName(),servermask))
 891                 {
 892                         Srv->SendOpers("*** Remote rehash initiated from server \002"+prefix+"\002.");
 893                         Srv->RehashServer();
 894                         ReadConfiguration(false);
 895                 }
 896                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
 897                 return true;
 898         }
 899
 900         bool RemoteKill(std::string prefix, std::deque<std::string> params)
 901         {
 902                 if (params.size() != 2)
 903                         return true;
 904                 std::string nick = params[0];
 905                 std::string reason = params[1];
 906                 userrec* u = Srv->FindNick(prefix);
 907                 userrec* who = Srv->FindNick(nick);
 908                 if (who)
 909                 {
 910                         std::string sourceserv = prefix;
 911                         if (u)
 912                         {
 913                                 sourceserv = u->server;
 914                         }
 915                         params[1] = ":" + params[1];
 916                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
 917                         Srv->QuitUser(who,reason);
 918                 }
 919                 return true;
 920         }
 921
 922         bool RemoteServer(std::string prefix, std::deque<std::string> params)
 923         {
 924                 if (params.size() < 4)
 925                         return false;
 926                 std::string servername = params[0];
 927                 std::string password = params[1];
 928                 // hopcount is not used for a remote server, we calculate this ourselves
 929                 std::string description = params[3];
 930                 TreeServer* ParentOfThis = FindServer(prefix);
 931                 if (!ParentOfThis)
 932                 {
 933                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
 934                         return false;
 935                 }
 936                 TreeServer* Node = new TreeServer(servername,description,ParentOfThis,NULL);
 937                 ParentOfThis->AddChild(Node);
 938                 params[3] = ":" + params[3];
 939                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
 940                 Srv->SendOpers("*** Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
 941                 return true;
 942         }
 943
 944         bool Outbound_Reply_Server(std::deque<std::string> params)
 945         {
 946                 if (params.size() < 4)
 947                         return false;
 948                 std::string servername = params[0];
 949                 std::string password = params[1];
 950                 int hops = atoi(params[2].c_str());
 951                 if (hops)
 952                 {
 953                         this->WriteLine("ERROR :Server too far away for authentication");
 954                         return false;
 955                 }
 956                 std::string description = params[3];
 957                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 958                 {
 959                         if ((x->Name == servername) && (x->RecvPass == password))
 960                         {
 961                                 // Begin the sync here. this kickstarts the
 962                                 // other side, waiting in WAIT_AUTH_2 state,
 963                                 // into starting their burst, as it shows
 964                                 // that we're happy.
 965                                 this->LinkState = CONNECTED;
 966                                 // we should add the details of this server now
 967                                 // to the servers tree, as a child of the root
 968                                 // node.
 969                                 TreeServer* Node = new TreeServer(servername,description,TreeRoot,this);
 970                                 TreeRoot->AddChild(Node);
 971                                 params[3] = ":" + params[3];
 972                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,servername);
 973                                 this->DoBurst(Node);
 974                                 this->SendChannelModes(s);
 975                                 this->WriteLine("ENDBURST");
 976                                 return true;
 977                         }
 978                 }
 979                 this->WriteLine("ERROR :Invalid credentials");
 980                 return false;
 981         }
 982
 983         bool Inbound_Server(std::deque<std::string> params)
 984         {
 985                 if (params.size() < 4)
 986                         return false;
 987                 std::string servername = params[0];
 988                 std::string password = params[1];
 989                 int hops = atoi(params[2].c_str());
 990                 if (hops)
 991                 {
 992                         this->WriteLine("ERROR :Server too far away for authentication");
 993                         return false;
 994                 }
 995                 std::string description = params[3];
 996                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 997                 {
 998                         if ((x->Name == servername) && (x->RecvPass == password))
 999                         {
1000                                 Srv->SendOpers("*** Verified incoming server connection from \002"+servername+"\002["+this->GetIP()+"] ("+description+")");
1001                                 this->InboundServerName = servername;
1002                                 this->InboundDescription = description;
1003                                 // this is good. Send our details: Our server name and description and hopcount of 0,
1004                                 // along with the sendpass from this block.
1005                                 this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
1006                                 // move to the next state, we are now waiting for THEM.
1007                                 this->LinkState = WAIT_AUTH_2;
1008                                 return true;
1009                         }
1010                 }
1011                 this->WriteLine("ERROR :Invalid credentials");
1012                 return false;
1013         }
1014
1015         std::deque<std::string> Split(std::string line, bool stripcolon)
1016         {
1017                 std::deque<std::string> n;
1018                 if (!strchr(line.c_str(),' '))
1019                 {
1020                         n.push_back(line);
1021                         return n;
1022                 }
1023                 std::stringstream s(line);
1024                 std::string param = "";
1025                 n.clear();
1026                 int item = 0;
1027                 while (!s.eof())
1028                 {
1029                         char c;
1030                         s.get(c);
1031                         if (c == ' ')
1032                         {
1033                                 n.push_back(param);
1034                                 param = "";
1035                                 item++;
1036                         }
1037                         else
1038                         {
1039                                 if (!s.eof())
1040                                 {
1041                                         param = param + c;
1042                                 }
1043                                 if ((param == ":") && (item > 0))
1044                                 {
1045                                         param = "";
1046                                         while (!s.eof())
1047                                         {
1048                                                 s.get(c);
1049                                                 if (!s.eof())
1050                                                 {
1051                                                         param = param + c;
1052                                                 }
1053                                         }
1054                                         n.push_back(param);
1055                                         param = "";
1056                                 }
1057                         }
1058                 }
1059                 if (param != "")
1060                 {
1061                         n.push_back(param);
1062                 }
1063                 return n;
1064         }
1065
1066         bool ProcessLine(std::string line)
1067         {
1068                 char* l = (char*)line.c_str();
1069                 while ((strlen(l)) && (l[strlen(l)-1] == '\r') || (l[strlen(l)-1] == '\n'))
1070                         l[strlen(l)-1] = '\0';
1071                 line = l;
1072                 if (line == "")
1073                         return true;
1074                 Srv->Log(DEBUG,"IN: '"+line+"'");
1075                 std::deque<std::string> params = this->Split(line,true);
1076                 std::string command = "";
1077                 std::string prefix = "";
1078                 if (((params[0].c_str())[0] == ':') && (params.size() > 1))
1079                 {
1080                         prefix = params[0];
1081                         command = params[1];
1082                         char* pref = (char*)prefix.c_str();
1083                         prefix = ++pref;
1084                         params.pop_front();
1085                         params.pop_front();
1086                 }
1087                 else
1088                 {
1089                         prefix = "";
1090                         command = params[0];
1091                         params.pop_front();
1092                 }
1093
1094                 switch (this->LinkState)
1095                 {
1096                         TreeServer* Node;
1097
1098                         case WAIT_AUTH_1:
1099                                 // Waiting for SERVER command from remote server. Server initiating
1100                                 // the connection sends the first SERVER command, listening server
1101                                 // replies with theirs if its happy, then if the initiator is happy,
1102                                 // it starts to send its net sync, which starts the merge, otherwise
1103                                 // it sends an ERROR.
1104                                 if (command == "SERVER")
1105                                 {
1106                                         return this->Inbound_Server(params);
1107                                 }
1108                                 else if (command == "ERROR")
1109                                 {
1110                                         return this->Error(params);
1111                                 }
1112                         break;
1113                         case WAIT_AUTH_2:
1114                                 // Waiting for start of other side's netmerge to say they liked our
1115                                 // password.
1116                                 if (command == "SERVER")
1117                                 {
1118                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
1119                                         // silently ignore.
1120                                         return true;
1121                                 }
1122                                 else if (command == "BURST")
1123                                 {
1124                                         this->LinkState = CONNECTED;
1125                                         Node = new TreeServer(InboundServerName,InboundDescription,TreeRoot,this);
1126                                         TreeRoot->AddChild(Node);
1127                                         params.clear();
1128                                         params.push_back(InboundServerName);
1129                                         params.push_back("*");
1130                                         params.push_back("1");
1131                                         params.push_back(":"+InboundDescription);
1132                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
1133                                 }
1134                                 else if (command == "ENDUSERS")
1135                                 {
1136                                         // one server must wait till the other servers list of synched users
1137                                         // before starting, so we have time to resolve collisions
1138                                         this->DoBurst(Node);
1139                                         this->SendChannelModes(s);
1140                                         this->WriteLine("ENDBURST");
1141                                 }
1142                                 else if (command == "ERROR")
1143                                 {
1144                                         return this->Error(params);
1145                                 }
1146
1147                         break;
1148                         case LISTENER:
1149                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
1150                                 return false;
1151                         break;
1152                         case CONNECTING:
1153                                 if (command == "SERVER")
1154                                 {
1155                                         // another server we connected to, which was in WAIT_AUTH_1 state,
1156                                         // has just sent us their credentials. If we get this far, theyre
1157                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
1158                                         // if we're happy with this, we should send our netburst which
1159                                         // kickstarts the merge.
1160                                         return this->Outbound_Reply_Server(params);
1161                                 }
1162                                 else if (command == "ERROR")
1163                                 {
1164                                         return this->Error(params);
1165                                 }
1166                         break;
1167                         case CONNECTED:
1168                                 // This is the 'authenticated' state, when all passwords
1169                                 // have been exchanged and anything past this point is taken
1170                                 // as gospel.
1171                                 std::string target = "";
1172                                 if ((command == "NICK") && (params.size() > 1))
1173                                 {
1174                                         return this->IntroduceClient(prefix,params);
1175                                 }
1176                                 else if (command == "FJOIN")
1177                                 {
1178                                         return this->ForceJoin(prefix,params);
1179                                 }
1180                                 else if (command == "SERVER")
1181                                 {
1182                                         return this->RemoteServer(prefix,params);
1183                                 }
1184                                 else if (command == "ERROR")
1185                                 {
1186                                         return this->Error(params);
1187                                 }
1188                                 else if (command == "OPERTYPE")
1189                                 {
1190                                         return this->OperType(prefix,params);
1191                                 }
1192                                 else if (command == "FMODE")
1193                                 {
1194                                         return this->ForceMode(prefix,params);
1195                                 }
1196                                 else if (command == "KILL")
1197                                 {
1198                                         return this->RemoteKill(prefix,params);
1199                                 }
1200                                 else if (command == "FTOPIC")
1201                                 {
1202                                         return this->ForceTopic(prefix,params);
1203                                 }
1204                                 else if (command == "REHASH")
1205                                 {
1206                                         return this->RemoteRehash(prefix,params);
1207                                 }
1208                                 else if (command == "FNICK")
1209                                 {
1210                                         return this->ForceNick(prefix,params);
1211                                 }
1212                                 else if (command == "ENDBURST")
1213                                 {
1214                                         return this->ClearFJoinReplacement();
1215                                 }
1216                                 else if (command == "SQUIT")
1217                                 {
1218                                         if (params.size() == 2)
1219                                         {
1220                                                 this->Squit(FindServer(params[0]),params[1]);
1221                                         }
1222                                         return true;
1223                                 }
1224                                 else
1225                                 {
1226                                         // not a special inter-server command.
1227                                         // Emulate the actual user doing the command,
1228                                         // this saves us having a huge ugly parser.
1229                                         userrec* who = Srv->FindNick(prefix);
1230                                         std::string sourceserv = this->myhost;
1231                                         if (this->InboundServerName != "")
1232                                         {
1233                                                 sourceserv = this->InboundServerName;
1234                                         }
1235                                         if (who)
1236                                         {
1237                                                 // its a user
1238                                                 target = who->server;
1239                                                 char* strparams[127];
1240                                                 for (unsigned int q = 0; q < params.size(); q++)
1241                                                 {
1242                                                         strparams[q] = (char*)params[q].c_str();
1243                                                 }
1244                                                 Srv->CallCommandHandler(command, strparams, params.size(), who);
1245                                         }
1246                                         else
1247                                         {
1248                                                 // its not a user. Its either a server, or somethings screwed up.
1249                                                 if (IsServer(prefix))
1250                                                 {
1251                                                         target = Srv->GetServerName();
1252                                                 }
1253                                                 else
1254                                                 {
1255                                                         log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
1256                                                         return true;
1257                                                 }
1258                                         }
1259                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1260
1261                                 }
1262                                 return true;
1263                         break;
1264                 }
1265                 return true;
1266         }
1267
1268         virtual std::string GetName()
1269         {
1270                 std::string sourceserv = this->myhost;
1271                 if (this->InboundServerName != "")
1272                 {
1273                         sourceserv = this->InboundServerName;
1274                 }
1275                 return sourceserv;
1276         }
1277
1278         virtual void OnTimeout()
1279         {
1280                 if (this->LinkState == CONNECTING)
1281                 {
1282                         Srv->SendOpers("*** CONNECT: Connection to \002"+myhost+"\002 timed out.");
1283                 }
1284         }
1285
1286         virtual void OnClose()
1287         {
1288                 // Connection closed.
1289                 // If the connection is fully up (state CONNECTED)
1290                 // then propogate a netsplit to all peers.
1291                 std::string quitserver = this->myhost;
1292                 if (this->InboundServerName != "")
1293                 {
1294                         quitserver = this->InboundServerName;
1295                 }
1296                 TreeServer* s = FindServer(quitserver);
1297                 if (s)
1298                 {
1299                         Squit(s,"Remote host closed the connection");
1300                 }
1301         }
1302
1303         virtual int OnIncomingConnection(int newsock, char* ip)
1304         {
1305                 TreeSocket* s = new TreeSocket(newsock, ip);
1306                 Srv->AddSocket(s);
1307                 return true;
1308         }
1309 };
1310
1311 void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
1312 {
1313         for (unsigned int c = 0; c < list.size(); c++)
1314         {
1315                 if (list[c] == server)
1316                 {
1317                         return;
1318                 }
1319         }
1320         list.push_back(server);
1321 }
1322
1323 // returns a list of DIRECT servernames for a specific channel
1324 std::deque<TreeServer*> GetListOfServersForChannel(chanrec* c)
1325 {
1326         std::deque<TreeServer*> list;
1327         std::vector<char*> *ulist = c->GetUsers();
1328         for (unsigned int i = 0; i < ulist->size(); i++)
1329         {
1330                 char* o = (*ulist)[i];
1331                 userrec* otheruser = (userrec*)o;
1332                 if (std::string(otheruser->server) != Srv->GetServerName())
1333                 {
1334                         TreeServer* best = BestRouteTo(otheruser->server);
1335                         if (best)
1336                                 AddThisServer(best,list);
1337                 }
1338         }
1339         return list;
1340 }
1341
1342 bool DoOneToAllButSenderRaw(std::string data,std::string omit,std::string prefix,std::string command,std::deque<std::string> params)
1343 {
1344         TreeServer* omitroute = BestRouteTo(omit);
1345         if ((command == "NOTICE") || (command == "PRIVMSG"))
1346         {
1347                 if (params.size() >= 2)
1348                 {
1349                         if (*(params[0].c_str()) != '#')
1350                         {
1351                                 // special routing for private messages/notices
1352                                 userrec* d = Srv->FindNick(params[0]);
1353                                 if (d)
1354                                 {
1355                                         std::deque<std::string> par;
1356                                         par.clear();
1357                                         par.push_back(params[0]);
1358                                         par.push_back(":"+params[1]);
1359                                         DoOneToOne(prefix,command,par,d->server);
1360                                         return true;
1361                                 }
1362                         }
1363                         else
1364                         {
1365                                 log(DEBUG,"Channel privmsg going to chan %s",params[0].c_str());
1366                                 chanrec* c = Srv->FindChannel(params[0]);
1367                                 if (c)
1368                                 {
1369                                         std::deque<TreeServer*> list = GetListOfServersForChannel(c);
1370                                         log(DEBUG,"Got a list of %d servers",list.size());
1371                                         for (unsigned int i = 0; i < list.size(); i++)
1372                                         {
1373                                                 TreeSocket* Sock = list[i]->GetSocket();
1374                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
1375                                                 {
1376                                                         log(DEBUG,"Writing privmsg to server %s",list[i]->GetName().c_str());
1377                                                         Sock->WriteLine(data);
1378                                                 }
1379                                         }
1380                                         return true;
1381                                 }
1382                         }
1383                 }
1384         }
1385         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1386         {
1387                 TreeServer* Route = TreeRoot->GetChild(x);
1388                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
1389                 {
1390                         TreeSocket* Sock = Route->GetSocket();
1391                         Sock->WriteLine(data);
1392                 }
1393         }
1394         return true;
1395 }
1396
1397 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> params, std::string omit)
1398 {
1399         TreeServer* omitroute = BestRouteTo(omit);
1400         std::string FullLine = ":" + prefix + " " + command;
1401         for (unsigned int x = 0; x < params.size(); x++)
1402         {
1403                 FullLine = FullLine + " " + params[x];
1404         }
1405         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1406         {
1407                 TreeServer* Route = TreeRoot->GetChild(x);
1408                 // Send the line IF:
1409                 // The route has a socket (its a direct connection)
1410                 // The route isnt the one to be omitted
1411                 // The route isnt the path to the one to be omitted
1412                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
1413                 {
1414                         TreeSocket* Sock = Route->GetSocket();
1415                         Sock->WriteLine(FullLine);
1416                 }
1417         }
1418         return true;
1419 }
1420
1421 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> params)
1422 {
1423         std::string FullLine = ":" + prefix + " " + command;
1424         for (unsigned int x = 0; x < params.size(); x++)
1425         {
1426                 FullLine = FullLine + " " + params[x];
1427         }
1428         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1429         {
1430                 TreeServer* Route = TreeRoot->GetChild(x);
1431                 if (Route->GetSocket())
1432                 {
1433                         TreeSocket* Sock = Route->GetSocket();
1434                         Sock->WriteLine(FullLine);
1435                 }
1436         }
1437         return true;
1438 }
1439
1440 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> params, std::string target)
1441 {
1442         TreeServer* Route = BestRouteTo(target);
1443         if (Route)
1444         {
1445                 std::string FullLine = ":" + prefix + " " + command;
1446                 for (unsigned int x = 0; x < params.size(); x++)
1447                 {
1448                         FullLine = FullLine + " " + params[x];
1449                 }
1450                 if (Route->GetSocket())
1451                 {
1452                         TreeSocket* Sock = Route->GetSocket();
1453                         Sock->WriteLine(FullLine);
1454                 }
1455                 return true;
1456         }
1457         else
1458         {
1459                 return true;
1460         }
1461 }
1462
1463 std::vector<TreeSocket*> Bindings;
1464
1465 void ReadConfiguration(bool rebind)
1466 {
1467         if (rebind)
1468         {
1469                 for (int j =0; j < Conf->Enumerate("bind"); j++)
1470                 {
1471                         std::string Type = Conf->ReadValue("bind","type",j);
1472                         std::string IP = Conf->ReadValue("bind","address",j);
1473                         long Port = Conf->ReadInteger("bind","port",j,true);
1474                         if (Type == "servers")
1475                         {
1476                                 if (IP == "*")
1477                                 {
1478                                         IP = "";
1479                                 }
1480                                 TreeSocket* listener = new TreeSocket(IP.c_str(),Port,true,10);
1481                                 if (listener->GetState() == I_LISTENING)
1482                                 {
1483                                         Srv->AddSocket(listener);
1484                                         Bindings.push_back(listener);
1485                                 }
1486                                 else
1487                                 {
1488                                         log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
1489                                         listener->Close();
1490                                         delete listener;
1491                                 }
1492                         }
1493                 }
1494         }
1495         LinkBlocks.clear();
1496         for (int j =0; j < Conf->Enumerate("link"); j++)
1497         {
1498                 Link L;
1499                 L.Name = Conf->ReadValue("link","name",j);
1500                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
1501                 L.Port = Conf->ReadInteger("link","port",j,true);
1502                 L.SendPass = Conf->ReadValue("link","sendpass",j);
1503                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
1504                 LinkBlocks.push_back(L);
1505                 log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
1506         }
1507 }
1508
1509
1510 class ModuleSpanningTree : public Module
1511 {
1512         std::vector<TreeSocket*> Bindings;
1513         int line;
1514
1515  public:
1516
1517         ModuleSpanningTree()
1518         {
1519                 Srv = new Server;
1520                 Conf = new ConfigReader;
1521                 Bindings.clear();
1522
1523                 // Create the root of the tree
1524                 TreeRoot = new TreeServer(Srv->GetServerName(),Srv->GetServerDescription());
1525
1526                 ReadConfiguration(true);
1527         }
1528
1529         void ShowLinks(TreeServer* Current, userrec* user, int hops)
1530         {
1531                 std::string Parent = TreeRoot->GetName();
1532                 if (Current->GetParent())
1533                 {
1534                         Parent = Current->GetParent()->GetName();
1535                 }
1536                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1537                 {
1538                         ShowLinks(Current->GetChild(q),user,hops+1);
1539                 }
1540                 WriteServ(user->fd,"364 %s %s %s :%d %s",user->nick,Current->GetName().c_str(),Parent.c_str(),hops,Current->GetDesc().c_str());
1541         }
1542
1543         void HandleLinks(char** parameters, int pcnt, userrec* user)
1544         {
1545                 ShowLinks(TreeRoot,user,0);
1546                 WriteServ(user->fd,"365 %s * :End of /LINKS list.",user->nick);
1547                 return;
1548         }
1549
1550         void HandleLusers(char** parameters, int pcnt, userrec* user)
1551         {
1552                 return;
1553         }
1554
1555         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
1556
1557         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80])
1558         {
1559                 if (line < 128)
1560                 {
1561                         for (int t = 0; t < depth; t++)
1562                         {
1563                                 matrix[line][t] = ' ';
1564                         }
1565                         strlcpy(&matrix[line][depth],Current->GetName().c_str(),80);
1566                         line++;
1567                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
1568                         {
1569                                 ShowMap(Current->GetChild(q),user,depth+2,matrix);
1570                         }
1571                 }
1572         }
1573
1574         // Ok, prepare to be confused.
1575         // After much mulling over how to approach this, it struck me that
1576         // the 'usual' way of doing a /MAP isnt the best way. Instead of
1577         // keeping track of a ton of ascii characters, and line by line
1578         // under recursion working out where to place them using multiplications
1579         // and divisons, we instead render the map onto a backplane of characters
1580         // (a character matrix), then draw the branches as a series of "L" shapes
1581         // from the nodes. This is not only friendlier on CPU it uses less stack.
1582
1583         void HandleMap(char** parameters, int pcnt, userrec* user)
1584         {
1585                 // This array represents a virtual screen which we will
1586                 // "scratch" draw to, as the console device of an irc
1587                 // client does not provide for a proper terminal.
1588                 char matrix[128][80];
1589                 for (unsigned int t = 0; t < 128; t++)
1590                 {
1591                         matrix[t][0] = '\0';
1592                 }
1593                 line = 0;
1594                 // The only recursive bit is called here.
1595                 ShowMap(TreeRoot,user,0,matrix);
1596                 // Process each line one by one. The algorithm has a limit of
1597                 // 128 servers (which is far more than a spanning tree should have
1598                 // anyway, so we're ok). This limit can be raised simply by making
1599                 // the character matrix deeper, 128 rows taking 10k of memory.
1600                 for (int l = 1; l < line; l++)
1601                 {
1602                         // scan across the line looking for the start of the
1603                         // servername (the recursive part of the algorithm has placed
1604                         // the servers at indented positions depending on what they
1605                         // are related to)
1606                         int first_nonspace = 0;
1607                         while (matrix[l][first_nonspace] == ' ')
1608                         {
1609                                 first_nonspace++;
1610                         }
1611                         first_nonspace--;
1612                         // Draw the `- (corner) section: this may be overwritten by
1613                         // another L shape passing along the same vertical pane, becoming
1614                         // a |- (branch) section instead.
1615                         matrix[l][first_nonspace] = '-';
1616                         matrix[l][first_nonspace-1] = '`';
1617                         int l2 = l - 1;
1618                         // Draw upwards until we hit the parent server, causing possibly
1619                         // other corners (`-) to become branches (|-)
1620                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
1621                         {
1622                                 matrix[l2][first_nonspace-1] = '|';
1623                                 l2--;
1624                         }
1625                 }
1626                 // dump the whole lot to the user. This is the easy bit, honest.
1627                 for (int t = 0; t < line; t++)
1628                 {
1629                         WriteServ(user->fd,"006 %s :%s",user->nick,&matrix[t][0]);
1630                 }
1631                 WriteServ(user->fd,"007 %s :End of /MAP",user->nick);
1632                 return;
1633         }
1634
1635         int HandleSquit(char** parameters, int pcnt, userrec* user)
1636         {
1637                 return 1;
1638         }
1639
1640         int HandleConnect(char** parameters, int pcnt, userrec* user)
1641         {
1642                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
1643                 {
1644                         if (Srv->MatchText(x->Name.c_str(),parameters[0]))
1645                         {
1646                                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: Connecting to server: %s (%s:%d)",user->nick,x->Name.c_str(),x->IPAddr.c_str(),x->Port);
1647                                 TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name);
1648                                 Srv->AddSocket(newsocket);
1649                                 return 1;
1650                         }
1651                 }
1652                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: No matching server could be found in the config file.",user->nick);
1653                 return 1;
1654         }
1655
1656         virtual int OnPreCommand(std::string command, char **parameters, int pcnt, userrec *user)
1657         {
1658                 if (command == "CONNECT")
1659                 {
1660                         return this->HandleConnect(parameters,pcnt,user);
1661                 }
1662                 else if (command == "SQUIT")
1663                 {
1664                         return this->HandleSquit(parameters,pcnt,user);
1665                 }
1666                 else if (command == "MAP")
1667                 {
1668                         this->HandleMap(parameters,pcnt,user);
1669                         return 1;
1670                 }
1671                 else if (command == "LUSERS")
1672                 {
1673                         this->HandleLusers(parameters,pcnt,user);
1674                         return 1;
1675                 }
1676                 else if (command == "LINKS")
1677                 {
1678                         this->HandleLinks(parameters,pcnt,user);
1679                         return 1;
1680                 }
1681                 else if (Srv->IsValidModuleCommand(command, pcnt, user))
1682                 {
1683                         // this bit of code cleverly routes all module commands
1684                         // to all remote severs *automatically* so that modules
1685                         // can just handle commands locally, without having
1686                         // to have any special provision in place for remote
1687                         // commands and linking protocols.
1688                         std::deque<std::string> params;
1689                         params.clear();
1690                         for (int j = 0; j < pcnt; j++)
1691                         {
1692                                 if (strchr(parameters[j],' '))
1693                                 {
1694                                         params.push_back(":" + std::string(parameters[j]));
1695                                 }
1696                                 else
1697                                 {
1698                                         params.push_back(std::string(parameters[j]));
1699                                 }
1700                         }
1701                         DoOneToMany(user->nick,command,params);
1702                 }
1703                 return 0;
1704         }
1705
1706         virtual void OnGetServerDescription(std::string servername,std::string &description)
1707         {
1708                 TreeServer* s = FindServer(servername);
1709                 if (s)
1710                 {
1711                         description = s->GetDesc();
1712                 }
1713         }
1714
1715         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
1716         {
1717                 if (std::string(source->server) == Srv->GetServerName())
1718                 {
1719                         std::deque<std::string> params;
1720                         params.push_back(dest->nick);
1721                         params.push_back(channel->name);
1722                         DoOneToMany(source->nick,"INVITE",params);
1723                 }
1724         }
1725
1726         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, std::string topic)
1727         {
1728                 std::deque<std::string> params;
1729                 params.push_back(chan->name);
1730                 params.push_back(":"+topic);
1731                 DoOneToMany(user->nick,"TOPIC",params);
1732         }
1733
1734         virtual void OnUserNotice(userrec* user, void* dest, int target_type, std::string text)
1735         {
1736                 if (target_type == TYPE_USER)
1737                 {
1738                         userrec* d = (userrec*)dest;
1739                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
1740                         {
1741                                 std::deque<std::string> params;
1742                                 params.clear();
1743                                 params.push_back(d->nick);
1744                                 params.push_back(":"+text);
1745                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
1746                         }
1747                 }
1748                 else
1749                 {
1750                         if (std::string(user->server) == Srv->GetServerName())
1751                         {
1752                                 chanrec *c = (chanrec*)dest;
1753                                 std::deque<TreeServer*> list = GetListOfServersForChannel(c);
1754                                 for (unsigned int i = 0; i < list.size(); i++)
1755                                 {
1756                                         TreeSocket* Sock = list[i]->GetSocket();
1757                                         if (Sock)
1758                                                 Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+std::string(c->name)+" :"+text);
1759                                 }
1760                         }
1761                 }
1762         }
1763
1764         virtual void OnUserMessage(userrec* user, void* dest, int target_type, std::string text)
1765         {
1766                 if (target_type == TYPE_USER)
1767                 {
1768                         // route private messages which are targetted at clients only to the server
1769                         // which needs to receive them
1770                         userrec* d = (userrec*)dest;
1771                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
1772                         {
1773                                 std::deque<std::string> params;
1774                                 params.clear();
1775                                 params.push_back(d->nick);
1776                                 params.push_back(":"+text);
1777                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
1778                         }
1779                 }
1780                 else
1781                 {
1782                         if (std::string(user->server) == Srv->GetServerName())
1783                         {
1784                                 chanrec *c = (chanrec*)dest;
1785                                 std::deque<TreeServer*> list = GetListOfServersForChannel(c);
1786                                 for (unsigned int i = 0; i < list.size(); i++)
1787                                 {
1788                                         TreeSocket* Sock = list[i]->GetSocket();
1789                                         if (Sock)
1790                                                 Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+std::string(c->name)+" :"+text);
1791                                 }
1792                         }
1793                 }
1794         }
1795
1796         virtual void OnUserJoin(userrec* user, chanrec* channel)
1797         {
1798                 // Only do this for local users
1799                 if (std::string(user->server) == Srv->GetServerName())
1800                 {
1801                         std::deque<std::string> params;
1802                         params.clear();
1803                         params.push_back(channel->name);
1804                         if (*channel->key)
1805                         {
1806                                 // if the channel has a key, force the join by emulating the key.
1807                                 params.push_back(channel->key);
1808                         }
1809                         DoOneToMany(user->nick,"JOIN",params);
1810                 }
1811         }
1812
1813         virtual void OnUserPart(userrec* user, chanrec* channel)
1814         {
1815                 if (std::string(user->server) == Srv->GetServerName())
1816                 {
1817                         std::deque<std::string> params;
1818                         params.clear();
1819                         params.push_back(channel->name);
1820                         DoOneToMany(user->nick,"PART",params);
1821                 }
1822         }
1823
1824         virtual void OnUserConnect(userrec* user)
1825         {
1826                 char agestr[MAXBUF];
1827                 if (std::string(user->server) == Srv->GetServerName())
1828                 {
1829                         std::deque<std::string> params;
1830                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
1831                         params.clear();
1832                         params.push_back(agestr);
1833                         params.push_back(user->nick);
1834                         params.push_back(user->host);
1835                         params.push_back(user->dhost);
1836                         params.push_back(user->ident);
1837                         params.push_back("+"+std::string(user->modes));
1838                         params.push_back(user->ip);
1839                         params.push_back(":"+std::string(user->fullname));
1840                         DoOneToMany(Srv->GetServerName(),"NICK",params);
1841                 }
1842         }
1843
1844         virtual void OnUserQuit(userrec* user, std::string reason)
1845         {
1846                 if (std::string(user->server) == Srv->GetServerName())
1847                 {
1848                         std::deque<std::string> params;
1849                         params.push_back(":"+reason);
1850                         DoOneToMany(user->nick,"QUIT",params);
1851                 }
1852         }
1853
1854         virtual void OnUserPostNick(userrec* user, std::string oldnick)
1855         {
1856                 if (std::string(user->server) == Srv->GetServerName())
1857                 {
1858                         std::deque<std::string> params;
1859                         params.push_back(user->nick);
1860                         DoOneToMany(oldnick,"NICK",params);
1861                 }
1862         }
1863
1864         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, std::string reason)
1865         {
1866                 if (std::string(source->server) == Srv->GetServerName())
1867                 {
1868                         std::deque<std::string> params;
1869                         params.push_back(chan->name);
1870                         params.push_back(user->nick);
1871                         params.push_back(":"+reason);
1872                         DoOneToMany(source->nick,"KICK",params);
1873                 }
1874         }
1875
1876         virtual void OnRemoteKill(userrec* source, userrec* dest, std::string reason)
1877         {
1878                 std::deque<std::string> params;
1879                 params.push_back(dest->nick);
1880                 params.push_back(":"+reason);
1881                 DoOneToMany(source->nick,"KILL",params);
1882         }
1883
1884         virtual void OnRehash(std::string parameter)
1885         {
1886                 if (parameter != "")
1887                 {
1888                         std::deque<std::string> params;
1889                         params.push_back(parameter);
1890                         DoOneToMany(Srv->GetServerName(),"REHASH",params);
1891                         // check for self
1892                         if (Srv->MatchText(Srv->GetServerName(),parameter))
1893                         {
1894                                 Srv->SendOpers("*** Remote rehash initiated from server \002"+Srv->GetServerName()+"\002.");
1895                                 Srv->RehashServer();
1896                         }
1897                 }
1898                 ReadConfiguration(false);
1899         }
1900
1901         // note: the protocol does not allow direct umode +o except
1902         // via NICK with 8 params. sending OPERTYPE infers +o modechange
1903         // locally.
1904         virtual void OnOper(userrec* user, std::string opertype)
1905         {
1906                 if (std::string(user->server) == Srv->GetServerName())
1907                 {
1908                         std::deque<std::string> params;
1909                         params.push_back(opertype);
1910                         DoOneToMany(user->nick,"OPERTYPE",params);
1911                 }
1912         }
1913
1914         virtual void OnMode(userrec* user, void* dest, int target_type, std::string text)
1915         {
1916                 if (std::string(user->server) == Srv->GetServerName())
1917                 {
1918                         if (target_type == TYPE_USER)
1919                         {
1920                                 userrec* u = (userrec*)dest;
1921                                 std::deque<std::string> params;
1922                                 params.push_back(u->nick);
1923                                 params.push_back(text);
1924                                 DoOneToMany(user->nick,"MODE",params);
1925                         }
1926                         else
1927                         {
1928                                 chanrec* c = (chanrec*)dest;
1929                                 std::deque<std::string> params;
1930                                 params.push_back(c->name);
1931                                 params.push_back(text);
1932                                 DoOneToMany(user->nick,"MODE",params);
1933                         }
1934                 }
1935         }
1936
1937         virtual void ProtoSendMode(void* opaque, int target_type, void* target, std::string modeline)
1938         {
1939                 TreeSocket* s = (TreeSocket*)opaque;
1940                 if (target)
1941                 {
1942                         if (target_type == TYPE_USER)
1943                         {
1944                                 userrec* u = (userrec*)target;
1945                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+u->nick+" "+modeline);
1946                         }
1947                         else
1948                         {
1949                                 chanrec* c = (chanrec*)target;
1950                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+modeline);
1951                         }
1952                 }
1953         }
1954
1955         virtual ~ModuleSpanningTree()
1956         {
1957                 delete Srv;
1958         }
1959
1960         virtual Version GetVersion()
1961         {
1962                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
1963         }
1964 };
1965
1966
1967 class ModuleSpanningTreeFactory : public ModuleFactory
1968 {
1969  public:
1970         ModuleSpanningTreeFactory()
1971         {
1972         }
1973
1974         ~ModuleSpanningTreeFactory()
1975         {
1976         }
1977
1978         virtual Module * CreateModule()
1979         {
1980                 TreeProtocolModule = new ModuleSpanningTree;
1981                 return TreeProtocolModule;
1982         }
1983
1984 };
1985
1986
1987 extern "C" void * init_module( void )
1988 {
1989         return new ModuleSpanningTreeFactory;
1990 }
1991