src/modules/m_spanningtree.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  Inspire is copyright (C) 2002-2005 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 using namespace std;
  18
  19 #include <stdio.h>
  20 #include <vector>
  21 #include <deque>
  22 #include "globals.h"
  23 #include "inspircd_config.h"
  24 #ifdef GCC3
  25 #include <ext/hash_map>
  26 #else
  27 #include <hash_map>
  28 #endif
  29 #include "users.h"
  30 #include "channels.h"
  31 #include "modules.h"
  32 #include "socket.h"
  33 #include "helperfuncs.h"
  34 #include "inspircd.h"
  35 #include "inspstring.h"
  36 #include "hashcomp.h"
  37 #include "message.h"
  38
  39 #ifdef GCC3
  40 #define nspace __gnu_cxx
  41 #else
  42 #define nspace std
  43 #endif
  44
  45 class ModuleSpanningTree;
  46 static ModuleSpanningTree* TreeProtocolModule;
  47
  48 extern std::vector<Module*> modules;
  49 extern std::vector<ircd_module*> factory;
  50 extern int MODCOUNT;
  51
  52 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  53
  54 typedef nspace::hash_map<std::string, userrec*, nspace::hash<string>, irc::StrHashComp> user_hash;
  55 typedef nspace::hash_map<std::string, chanrec*, nspace::hash<string>, irc::StrHashComp> chan_hash;
  56
  57 extern user_hash clientlist;
  58 extern chan_hash chanlist;
  59
  60 class TreeServer;
  61 class TreeSocket;
  62
  63 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> params, std::string target);
  64 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> params, std::string omit);
  65 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> params);
  66 bool DoOneToAllButSenderRaw(std::string data,std::string omit, std::string prefix,std::string command,std::deque<std::string> params);
  67 void ReadConfiguration(bool rebind);
  68
  69 class TreeServer
  70 {
  71         TreeServer* Parent;
  72         std::vector<TreeServer*> Children;
  73         std::string ServerName;
  74         std::string ServerDesc;
  75         std::string VersionString;
  76         int UserCount;
  77         int OperCount;
  78         TreeSocket* Socket;     // for directly connected servers this points at the socket object
  79
  80  public:
  81
  82         TreeServer()
  83         {
  84                 Parent = NULL;
  85                 ServerName = "";
  86                 ServerDesc = "";
  87                 VersionString = "";
  88                 UserCount = OperCount = 0;
  89         }
  90
  91         TreeServer(std::string Name, std::string Desc) : ServerName(Name), ServerDesc(Desc)
  92         {
  93                 Parent = NULL;
  94                 VersionString = "";
  95                 UserCount = OperCount = 0;
  96         }
  97
  98         TreeServer(std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock) : Parent(Above), ServerName(Name), ServerDesc(Desc), Socket(Sock)
  99         {
 100                 VersionString = "";
 101                 UserCount = OperCount = 0;
 102         }
 103
 104         std::string GetName()
 105         {
 106                 return this->ServerName;
 107         }
 108
 109         std::string GetDesc()
 110         {
 111                 return this->ServerDesc;
 112         }
 113
 114         std::string GetVersion()
 115         {
 116                 return this->VersionString;
 117         }
 118
 119         int GetUserCount()
 120         {
 121                 return this->UserCount;
 122         }
 123
 124         int GetOperCount()
 125         {
 126                 return this->OperCount;
 127         }
 128
 129         TreeSocket* GetSocket()
 130         {
 131                 return this->Socket;
 132         }
 133
 134         TreeServer* GetParent()
 135         {
 136                 return this->Parent;
 137         }
 138
 139         unsigned int ChildCount()
 140         {
 141                 return Children.size();
 142         }
 143
 144         TreeServer* GetChild(unsigned int n)
 145         {
 146                 if (n < Children.size())
 147                 {
 148                         return Children[n];
 149                 }
 150                 else
 151                 {
 152                         return NULL;
 153                 }
 154         }
 155
 156         void AddChild(TreeServer* Child)
 157         {
 158                 Children.push_back(Child);
 159         }
 160
 161         bool DelChild(TreeServer* Child)
 162         {
 163                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 164                 {
 165                         if (*a == Child)
 166                         {
 167                                 Children.erase(a);
 168                                 return true;
 169                         }
 170                 }
 171                 return false;
 172         }
 173
 174         // removes child nodes of this node, and of that node, etc etc
 175         bool Tidy()
 176         {
 177                 bool stillchildren = true;
 178                 while (stillchildren)
 179                 {
 180                         stillchildren = false;
 181                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 182                         {
 183                                 TreeServer* s = (TreeServer*)*a;
 184                                 s->Tidy();
 185                                 Children.erase(a);
 186                                 delete s;
 187                                 stillchildren = true;
 188                                 break;
 189                         }
 190                 }
 191                 return true;
 192         }
 193 };
 194
 195 class Link
 196 {
 197  public:
 198          std::string Name;
 199          std::string IPAddr;
 200          int Port;
 201          std::string SendPass;
 202          std::string RecvPass;
 203 };
 204
 205 /* $ModDesc: Povides a spanning tree server link protocol */
 206
 207 Server *Srv;
 208 ConfigReader *Conf;
 209 TreeServer *TreeRoot;
 210 std::vector<Link> LinkBlocks;
 211
 212 TreeServer* RouteEnumerate(TreeServer* Current, std::string ServerName)
 213 {
 214         if (Current->GetName() == ServerName)
 215                 return Current;
 216         for (unsigned int q = 0; q < Current->ChildCount(); q++)
 217         {
 218                 TreeServer* found = RouteEnumerate(Current->GetChild(q),ServerName);
 219                 if (found)
 220                 {
 221                         return found;
 222                 }
 223         }
 224         return NULL;
 225 }
 226
 227 // Returns the locally connected server we must route a
 228 // message through to reach server 'ServerName'. This
 229 // only applies to one-to-one and not one-to-many routing.
 230 TreeServer* BestRouteTo(std::string ServerName)
 231 {
 232         if (ServerName.c_str() == TreeRoot->GetName())
 233         {
 234                 return NULL;
 235         }
 236         // first, find the server by recursively walking the tree
 237         TreeServer* Found = RouteEnumerate(TreeRoot,ServerName);
 238         // did we find it? If not, they did something wrong, abort.
 239         if (!Found)
 240         {
 241                 return NULL;
 242         }
 243         else
 244         {
 245                 // The server exists, follow its parent nodes until
 246                 // the parent of the current is 'TreeRoot', we know
 247                 // then that this is a directly-connected server.
 248                 while ((Found) && (Found->GetParent() != TreeRoot))
 249                 {
 250                         Found = Found->GetParent();
 251                 }
 252                 return Found;
 253         }
 254 }
 255
 256 bool LookForServer(TreeServer* Current, std::string ServerName)
 257 {
 258         if (ServerName == Current->GetName())
 259                 return true;
 260         for (unsigned int q = 0; q < Current->ChildCount(); q++)
 261         {
 262                 if (LookForServer(Current->GetChild(q),ServerName))
 263                         return true;
 264         }
 265         return false;
 266 }
 267
 268 TreeServer* Found;
 269
 270 void RFindServer(TreeServer* Current, std::string ServerName)
 271 {
 272         if ((ServerName == Current->GetName()) && (!Found))
 273         {
 274                 Found = Current;
 275                 return;
 276         }
 277         if (!Found)
 278         {
 279                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 280                 {
 281                         if (!Found)
 282                                 RFindServer(Current->GetChild(q),ServerName);
 283                 }
 284         }
 285         return;
 286 }
 287
 288 TreeServer* FindServer(std::string ServerName)
 289 {
 290         Found = NULL;
 291         RFindServer(TreeRoot,ServerName);
 292         return Found;
 293 }
 294
 295 bool IsServer(std::string ServerName)
 296 {
 297         return LookForServer(TreeRoot,ServerName);
 298 }
 299
 300 class TreeSocket : public InspSocket
 301 {
 302         std::string myhost;
 303         std::string in_buffer;
 304         ServerState LinkState;
 305         std::string InboundServerName;
 306         std::string InboundDescription;
 307         int num_lost_users;
 308         int num_lost_servers;
 309
 310  public:
 311
 312         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime)
 313                 : InspSocket(host, port, listening, maxtime)
 314         {
 315                 myhost = host;
 316                 this->LinkState = LISTENER;
 317         }
 318
 319         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 320                 : InspSocket(host, port, listening, maxtime)
 321         {
 322                 myhost = ServerName;
 323                 this->LinkState = CONNECTING;
 324         }
 325
 326         TreeSocket(int newfd, char* ip)
 327                 : InspSocket(newfd, ip)
 328         {
 329                 this->LinkState = WAIT_AUTH_1;
 330         }
 331
 332         virtual bool OnConnected()
 333         {
 334                 if (this->LinkState == CONNECTING)
 335                 {
 336                         Srv->SendOpers("*** Connection to "+myhost+"["+this->GetIP()+"] established.");
 337                         // we should send our details here.
 338                         // if the other side is satisfied, they send theirs.
 339                         // we do not need to change state here.
 340                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 341                         {
 342                                 if (x->Name == this->myhost)
 343                                 {
 344                                         // found who we're supposed to be connecting to, send the neccessary gubbins.
 345                                         this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 346                                         return true;
 347                                 }
 348                         }
 349                 }
 350                 return true;
 351         }
 352
 353         virtual void OnError(InspSocketError e)
 354         {
 355         }
 356
 357         virtual int OnDisconnect()
 358         {
 359                 return true;
 360         }
 361
 362         // recursively send the server tree with distances as hops
 363         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 364         {
 365                 char command[1024];
 366                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 367                 {
 368                         TreeServer* recursive_server = Current->GetChild(q);
 369                         if (recursive_server != s)
 370                         {
 371                                 // :source.server SERVER server.name hops :Description
 372                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 373                                 this->WriteLine(command);
 374                                 // down to next level
 375                                 this->SendServers(recursive_server, s, hops+1);
 376                         }
 377                 }
 378         }
 379
 380         void SquitServer(TreeServer* Current)
 381         {
 382                 // recursively squit the servers attached to 'Current'
 383                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 384                 {
 385                         TreeServer* recursive_server = Current->GetChild(q);
 386                         this->SquitServer(recursive_server);
 387                 }
 388                 // Now we've whacked the kids, whack self
 389                 num_lost_servers++;
 390                 bool quittingpeople = true;
 391                 while (quittingpeople)
 392                 {
 393                         quittingpeople = false;
 394                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 395                         {
 396                                 if (!strcasecmp(u->second->server,Current->GetName().c_str()))
 397                                 {
 398                                         Srv->QuitUser(u->second,Current->GetName()+" "+std::string(Srv->GetServerName()));
 399                                         num_lost_users++;
 400                                         quittingpeople = true;
 401                                         break;
 402                                 }
 403                         }
 404                 }
 405         }
 406
 407         void Squit(TreeServer* Current,std::string reason)
 408         {
 409                 if (Current)
 410                 {
 411                         std::deque<std::string> params;
 412                         params.push_back(Current->GetName());
 413                         params.push_back(":"+reason);
 414                         DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
 415                         if (Current->GetParent() == TreeRoot)
 416                         {
 417                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
 418                         }
 419                         else
 420                         {
 421                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
 422                         }
 423                         num_lost_servers = 0;
 424                         num_lost_users = 0;
 425                         SquitServer(Current);
 426                         Current->Tidy();
 427                         Current->GetParent()->DelChild(Current);
 428                         delete Current;
 429                         WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
 430                 }
 431                 else
 432                 {
 433                         log(DEFAULT,"Squit from unknown server");
 434                 }
 435         }
 436
 437         bool ForceMode(std::string source, std::deque<std::string> params)
 438         {
 439                 userrec* who = new userrec;
 440                 who->fd = FD_MAGIC_NUMBER;
 441                 if (params.size() < 2)
 442                         return true;
 443                 char* modelist[255];
 444                 for (unsigned int q = 0; q < params.size(); q++)
 445                 {
 446                         modelist[q] = (char*)params[q].c_str();
 447                 }
 448                 Srv->SendMode(modelist,params.size(),who);
 449                 DoOneToAllButSender(source,"FMODE",params,source);
 450                 delete who;
 451                 return true;
 452         }
 453
 454         bool ForceTopic(std::string source, std::deque<std::string> params)
 455         {
 456                 // FTOPIC %s %lu %s :%s
 457                 if (params.size() != 4)
 458                         return true;
 459                 std::string channel = params[0];
 460                 time_t ts = atoi(params[1].c_str());
 461                 std::string setby = params[2];
 462                 std::string topic = params[3];
 463
 464                 chanrec* c = Srv->FindChannel(channel);
 465                 if (c)
 466                 {
 467                         if ((ts >= c->topicset) || (!*c->topic))
 468                         {
 469                                 strlcpy(c->topic,topic.c_str(),MAXTOPIC);
 470                                 strlcpy(c->setby,setby.c_str(),NICKMAX);
 471                                 c->topicset = ts;
 472                                 WriteChannelWithServ((char*)source.c_str(), c, "TOPIC %s :%s", c->name, c->topic);
 473                         }
 474
 475                 }
 476
 477                 // all done, send it on its way
 478                 params[3] = ":" + params[3];
 479                 DoOneToAllButSender(source,"FTOPIC",params,source);
 480
 481                 return true;
 482         }
 483
 484         bool ForceJoin(std::string source, std::deque<std::string> params)
 485         {
 486                 if (params.size() < 3)
 487                         return true;
 488
 489                 char first[MAXBUF];
 490                 char modestring[MAXBUF];
 491                 char* mode_users[127];
 492                 mode_users[0] = first;
 493                 mode_users[1] = modestring;
 494                 strcpy(mode_users[1],"+");
 495                 unsigned int modectr = 2;
 496
 497                 userrec* who = NULL;
 498                 std::string channel = params[0];
 499                 time_t TS = atoi(params[1].c_str());
 500                 char* key = "";
 501
 502                 chanrec* chan = Srv->FindChannel(channel);
 503                 if (chan)
 504                 {
 505                         key = chan->key;
 506                 }
 507                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
 508
 509                 // default is a high value, which if we dont have this
 510                 // channel will let the other side apply their modes.
 511                 time_t ourTS = time(NULL)+20;
 512                 chanrec* us = Srv->FindChannel(channel);
 513                 if (us)
 514                 {
 515                         ourTS = us->age;
 516                 }
 517
 518                 log(DEBUG,"FJOIN detected, our TS=%lu, their TS=%lu",ourTS,TS);
 519
 520                 // do this first, so our mode reversals are correctly received by other servers
 521                 // if there is a TS collision.
 522                 DoOneToAllButSender(source,"FJOIN",params,source);
 523
 524                 for (unsigned int usernum = 2; usernum < params.size(); usernum++)
 525                 {
 526                         // process one channel at a time, applying modes.
 527                         char* usr = (char*)params[usernum].c_str();
 528                         char permissions = *usr;
 529                         switch (permissions)
 530                         {
 531                                 case '@':
 532                                         usr++;
 533                                         mode_users[modectr++] = usr;
 534                                         strlcat(modestring,"o",MAXBUF);
 535                                 break;
 536                                 case '%':
 537                                         usr++;
 538                                         mode_users[modectr++] = usr;
 539                                         strlcat(modestring,"h",MAXBUF);
 540                                 break;
 541                                 case '+':
 542                                         usr++;
 543                                         mode_users[modectr++] = usr;
 544                                         strlcat(modestring,"v",MAXBUF);
 545                                 break;
 546                         }
 547                         who = Srv->FindNick(usr);
 548                         if (who)
 549                         {
 550                                 Srv->JoinUserToChannel(who,channel,key);
 551                                 if (modectr >= (MAXMODES-1))
 552                                 {
 553                                         // theres a mode for this user. push them onto the mode queue, and flush it
 554                                         // if there are more than MAXMODES to go.
 555                                         if (ourTS >= TS)
 556                                         {
 557                                                 log(DEBUG,"Our our channel newer than theirs, accepting their modes");
 558                                                 Srv->SendMode(mode_users,modectr,who);
 559                                         }
 560                                         else
 561                                         {
 562                                                 log(DEBUG,"Their channel newer than ours, bouncing their modes");
 563                                                 // bouncy bouncy!
 564                                                 std::deque<std::string> params;
 565                                                 // modes are now being UNSET...
 566                                                 *mode_users[1] = '-';
 567                                                 for (unsigned int x = 0; x < modectr; x++)
 568                                                 {
 569                                                         params.push_back(mode_users[x]);
 570                                                 }
 571                                                 // tell everyone to bounce the modes. bad modes, bad!
 572                                                 DoOneToMany(Srv->GetServerName(),"FMODE",params);
 573                                         }
 574                                         strcpy(mode_users[1],"+");
 575                                         modectr = 2;
 576                                 }
 577                         }
 578                 }
 579                 // there werent enough modes built up to flush it during FJOIN,
 580                 // or, there are a number left over. flush them out.
 581                 if ((modectr > 2) && (who))
 582                 {
 583                         if (ourTS >= TS)
 584                         {
 585                                 log(DEBUG,"Our our channel newer than theirs, accepting their modes");
 586                                 Srv->SendMode(mode_users,modectr,who);
 587                         }
 588                         else
 589                         {
 590                                 log(DEBUG,"Their channel newer than ours, bouncing their modes");
 591                                 std::deque<std::string> params;
 592                                 *mode_users[1] = '-';
 593                                 for (unsigned int x = 0; x < modectr; x++)
 594                                 {
 595                                         params.push_back(mode_users[x]);
 596                                 }
 597                                 DoOneToMany(Srv->GetServerName(),"FMODE",params);
 598                         }
 599                 }
 600                 return true;
 601         }
 602
 603         bool IntroduceClient(std::string source, std::deque<std::string> params)
 604         {
 605                 if (params.size() < 8)
 606                         return true;
 607                 // NICK age nick host dhost ident +modes ip :gecos
 608                 //       0   1    2    3      4     5    6   7
 609                 std::string nick = params[1];
 610                 std::string host = params[2];
 611                 std::string dhost = params[3];
 612                 std::string ident = params[4];
 613                 time_t age = atoi(params[0].c_str());
 614                 std::string modes = params[5];
 615                 if (*(modes.c_str()) == '+')
 616                 {
 617                         char* m = (char*)modes.c_str();
 618                         m++;
 619                         modes = m;
 620                 }
 621                 std::string ip = params[6];
 622                 std::string gecos = params[7];
 623                 char* tempnick = (char*)nick.c_str();
 624                 log(DEBUG,"Introduce client %s!%s@%s",tempnick,ident.c_str(),host.c_str());
 625
 626                 user_hash::iterator iter;
 627                 iter = clientlist.find(tempnick);
 628                 if (iter != clientlist.end())
 629                 {
 630                         // nick collision
 631                         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);
 632                         this->WriteLine(":"+Srv->GetServerName()+" KILL "+tempnick+" :Nickname collision");
 633                         return true;
 634                 }
 635
 636                 clientlist[tempnick] = new userrec();
 637                 clientlist[tempnick]->fd = FD_MAGIC_NUMBER;
 638                 strlcpy(clientlist[tempnick]->nick, tempnick,NICKMAX);
 639                 strlcpy(clientlist[tempnick]->host, host.c_str(),160);
 640                 strlcpy(clientlist[tempnick]->dhost, dhost.c_str(),160);
 641                 clientlist[tempnick]->server = (char*)FindServerNamePtr(source.c_str());
 642                 strlcpy(clientlist[tempnick]->ident, ident.c_str(),IDENTMAX);
 643                 strlcpy(clientlist[tempnick]->fullname, gecos.c_str(),MAXGECOS);
 644                 clientlist[tempnick]->registered = 7;
 645                 clientlist[tempnick]->signon = age;
 646                 strlcpy(clientlist[tempnick]->ip,ip.c_str(),16);
 647                 for (int i = 0; i < MAXCHANS; i++)
 648                 {
 649                         clientlist[tempnick]->chans[i].channel = NULL;
 650                         clientlist[tempnick]->chans[i].uc_modes = 0;
 651                 }
 652                 params[7] = ":" + params[7];
 653                 DoOneToAllButSender(source,"NICK",params,source);
 654                 return true;
 655         }
 656
 657         void SendFJoins(TreeServer* Current, chanrec* c)
 658         {
 659                 char list[MAXBUF];
 660                 snprintf(list,MAXBUF,":%s FJOIN %s %lu",Srv->GetServerName().c_str(),c->name,(unsigned long)c->age);
 661                 std::vector<char*> *ulist = c->GetUsers();
 662                 for (unsigned int i = 0; i < ulist->size(); i++)
 663                 {
 664                         char* o = (*ulist)[i];
 665                         userrec* otheruser = (userrec*)o;
 666                         strlcat(list," ",MAXBUF);
 667                         strlcat(list,cmode(otheruser,c),MAXBUF);
 668                         strlcat(list,otheruser->nick,MAXBUF);
 669                         if (strlen(list)>(480-NICKMAX))
 670                         {
 671                                 this->WriteLine(list);
 672                                 snprintf(list,MAXBUF,":%s FJOIN %s %lu",Srv->GetServerName().c_str(),c->name,(unsigned long)c->age);
 673                         }
 674                 }
 675                 if (list[strlen(list)-1] != ':')
 676                 {
 677                         this->WriteLine(list);
 678                 }
 679         }
 680
 681         void SendChannelModes(TreeServer* Current)
 682         {
 683                 char data[MAXBUF];
 684                 for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 685                 {
 686                         SendFJoins(Current, c->second);
 687                         snprintf(data,MAXBUF,":%s FMODE %s +%s",Srv->GetServerName().c_str(),c->second->name,chanmodes(c->second));
 688                         this->WriteLine(data);
 689                         if (*c->second->topic)
 690                         {
 691                                 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);
 692                                 this->WriteLine(data);
 693                         }
 694                         for (BanList::iterator b = c->second->bans.begin(); b != c->second->bans.end(); b++)
 695                         {
 696                                 snprintf(data,MAXBUF,":%s FMODE %s +b %s",Srv->GetServerName().c_str(),c->second->name,b->data);
 697                                 this->WriteLine(data);
 698                         }
 699                         FOREACH_MOD OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this);
 700                 }
 701         }
 702
 703         // send all users and their channels
 704         void SendUsers(TreeServer* Current)
 705         {
 706                 char data[MAXBUF];
 707                 for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 708                 {
 709                         if (u->second->registered == 7)
 710                         {
 711                                 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);
 712                                 this->WriteLine(data);
 713                                 if (strchr(u->second->modes,'o'))
 714                                 {
 715                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
 716                                 }
 717                                 //char* chl = chlist(u->second,u->second);
 718                                 //if (*chl)
 719                                 //{
 720                                 //      this->WriteLine(":"+std::string(u->second->nick)+" FJOIN "+std::string(chl));
 721                                 //}
 722                                 FOREACH_MOD OnSyncUser(u->second,(Module*)TreeProtocolModule,(void*)this);
 723                         }
 724                 }
 725         }
 726
 727         void DoBurst(TreeServer* s)
 728         {
 729                 Srv->SendOpers("*** Bursting to "+s->GetName()+".");
 730                 this->WriteLine("BURST");
 731                 // Send server tree
 732                 this->SendServers(TreeRoot,s,1);
 733                 // Send users and their channels
 734                 this->SendUsers(s);
 735                 // TODO: Send everything else (channel modes etc)
 736                 this->SendChannelModes(s);
 737                 this->WriteLine("ENDBURST");
 738         }
 739
 740         virtual bool OnDataReady()
 741         {
 742                 char* data = this->Read();
 743                 if (data)
 744                 {
 745                         this->in_buffer += data;
 746                         while (in_buffer.find("\n") != std::string::npos)
 747                         {
 748                                 char* line = (char*)in_buffer.c_str();
 749                                 std::string ret = "";
 750                                 while ((*line != '\n') && (strlen(line)))
 751                                 {
 752                                         ret = ret + *line;
 753                                         line++;
 754                                 }
 755                                 if ((*line == '\n') || (*line == '\r'))
 756                                         line++;
 757                                 in_buffer = line;
 758                                 if (!this->ProcessLine(ret))
 759                                 {
 760                                         return false;
 761                                 }
 762                         }
 763                 }
 764                 return (data != NULL);
 765         }
 766
 767         int WriteLine(std::string line)
 768         {
 769                 return this->Write(line + "\r\n");
 770         }
 771
 772         bool Error(std::deque<std::string> params)
 773         {
 774                 if (params.size() < 1)
 775                         return false;
 776                 std::string Errmsg = params[0];
 777                 std::string SName = myhost;
 778                 if (InboundServerName != "")
 779                 {
 780                         SName = InboundServerName;
 781                 }
 782                 Srv->SendOpers("*** ERROR from "+SName+": "+Errmsg);
 783                 // we will return false to cause the socket to close.
 784                 return false;
 785         }
 786
 787         bool OperType(std::string prefix, std::deque<std::string> params)
 788         {
 789                 if (params.size() != 1)
 790                         return true;
 791                 std::string opertype = params[0];
 792                 userrec* u = Srv->FindNick(prefix);
 793                 if (u)
 794                 {
 795                         strlcpy(u->oper,opertype.c_str(),NICKMAX);
 796                         if (!strchr(u->modes,'o'))
 797                         {
 798                                 strcat(u->modes,"o");
 799                         }
 800                         DoOneToAllButSender(u->server,"OPERTYPE",params,u->server);
 801                 }
 802                 return true;
 803         }
 804
 805         bool RemoteRehash(std::string prefix, std::deque<std::string> params)
 806         {
 807                 if (params.size() < 1)
 808                         return true;
 809                 std::string servermask = params[0];
 810                 if (Srv->MatchText(Srv->GetServerName(),servermask))
 811                 {
 812                         Srv->SendOpers("*** Remote rehash initiated from server \002"+prefix+"\002.");
 813                         Srv->RehashServer();
 814                         ReadConfiguration(false);
 815                 }
 816                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
 817                 return true;
 818         }
 819
 820         bool RemoteKill(std::string prefix, std::deque<std::string> params)
 821         {
 822                 if (params.size() != 2)
 823                         return true;
 824                 std::string nick = params[0];
 825                 std::string reason = params[1];
 826                 userrec* u = Srv->FindNick(prefix);
 827                 userrec* who = Srv->FindNick(nick);
 828                 if (who)
 829                 {
 830                         std::string sourceserv = prefix;
 831                         if (u)
 832                         {
 833                                 sourceserv = u->server;
 834                         }
 835                         params[1] = ":" + params[1];
 836                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
 837                         Srv->QuitUser(who,reason);
 838                 }
 839                 return true;
 840         }
 841
 842         bool RemoteServer(std::string prefix, std::deque<std::string> params)
 843         {
 844                 if (params.size() < 4)
 845                         return false;
 846                 std::string servername = params[0];
 847                 std::string password = params[1];
 848                 // hopcount is not used for a remote server, we calculate this ourselves
 849                 std::string description = params[3];
 850                 TreeServer* ParentOfThis = FindServer(prefix);
 851                 if (!ParentOfThis)
 852                 {
 853                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
 854                         return false;
 855                 }
 856                 TreeServer* Node = new TreeServer(servername,description,ParentOfThis,NULL);
 857                 ParentOfThis->AddChild(Node);
 858                 params[3] = ":" + params[3];
 859                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
 860                 Srv->SendOpers("*** Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
 861                 return true;
 862         }
 863
 864         bool Outbound_Reply_Server(std::deque<std::string> params)
 865         {
 866                 if (params.size() < 4)
 867                         return false;
 868                 std::string servername = params[0];
 869                 std::string password = params[1];
 870                 int hops = atoi(params[2].c_str());
 871                 if (hops)
 872                 {
 873                         this->WriteLine("ERROR :Server too far away for authentication");
 874                         return false;
 875                 }
 876                 std::string description = params[3];
 877                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 878                 {
 879                         if ((x->Name == servername) && (x->RecvPass == password))
 880                         {
 881                                 // Begin the sync here. this kickstarts the
 882                                 // other side, waiting in WAIT_AUTH_2 state,
 883                                 // into starting their burst, as it shows
 884                                 // that we're happy.
 885                                 this->LinkState = CONNECTED;
 886                                 // we should add the details of this server now
 887                                 // to the servers tree, as a child of the root
 888                                 // node.
 889                                 TreeServer* Node = new TreeServer(servername,description,TreeRoot,this);
 890                                 TreeRoot->AddChild(Node);
 891                                 params[3] = ":" + params[3];
 892                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,servername);
 893                                 this->DoBurst(Node);
 894                                 return true;
 895                         }
 896                 }
 897                 this->WriteLine("ERROR :Invalid credentials");
 898                 return false;
 899         }
 900
 901         bool Inbound_Server(std::deque<std::string> params)
 902         {
 903                 if (params.size() < 4)
 904                         return false;
 905                 std::string servername = params[0];
 906                 std::string password = params[1];
 907                 int hops = atoi(params[2].c_str());
 908                 if (hops)
 909                 {
 910                         this->WriteLine("ERROR :Server too far away for authentication");
 911                         return false;
 912                 }
 913                 std::string description = params[3];
 914                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 915                 {
 916                         if ((x->Name == servername) && (x->RecvPass == password))
 917                         {
 918                                 Srv->SendOpers("*** Verified incoming server connection from \002"+servername+"\002["+this->GetIP()+"] ("+description+")");
 919                                 this->InboundServerName = servername;
 920                                 this->InboundDescription = description;
 921                                 // this is good. Send our details: Our server name and description and hopcount of 0,
 922                                 // along with the sendpass from this block.
 923                                 this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 924                                 // move to the next state, we are now waiting for THEM.
 925                                 this->LinkState = WAIT_AUTH_2;
 926                                 return true;
 927                         }
 928                 }
 929                 this->WriteLine("ERROR :Invalid credentials");
 930                 return false;
 931         }
 932
 933         std::deque<std::string> Split(std::string line, bool stripcolon)
 934         {
 935                 std::deque<std::string> n;
 936                 if (!strchr(line.c_str(),' '))
 937                 {
 938                         n.push_back(line);
 939                         return n;
 940                 }
 941                 std::stringstream s(line);
 942                 std::string param = "";
 943                 n.clear();
 944                 int item = 0;
 945                 while (!s.eof())
 946                 {
 947                         char c;
 948                         s.get(c);
 949                         if (c == ' ')
 950                         {
 951                                 n.push_back(param);
 952                                 param = "";
 953                                 item++;
 954                         }
 955                         else
 956                         {
 957                                 if (!s.eof())
 958                                 {
 959                                         param = param + c;
 960                                 }
 961                                 if ((param == ":") && (item > 0))
 962                                 {
 963                                         param = "";
 964                                         while (!s.eof())
 965                                         {
 966                                                 s.get(c);
 967                                                 if (!s.eof())
 968                                                 {
 969                                                         param = param + c;
 970                                                 }
 971                                         }
 972                                         n.push_back(param);
 973                                         param = "";
 974                                 }
 975                         }
 976                 }
 977                 if (param != "")
 978                 {
 979                         n.push_back(param);
 980                 }
 981                 return n;
 982         }
 983
 984         bool ProcessLine(std::string line)
 985         {
 986                 char* l = (char*)line.c_str();
 987                 while ((strlen(l)) && (l[strlen(l)-1] == '\r') || (l[strlen(l)-1] == '\n'))
 988                         l[strlen(l)-1] = '\0';
 989                 line = l;
 990                 if (line == "")
 991                         return true;
 992                 Srv->Log(DEBUG,"IN: '"+line+"'");
 993                 std::deque<std::string> params = this->Split(line,true);
 994                 std::string command = "";
 995                 std::string prefix = "";
 996                 if (((params[0].c_str())[0] == ':') && (params.size() > 1))
 997                 {
 998                         prefix = params[0];
 999                         command = params[1];
1000                         char* pref = (char*)prefix.c_str();
1001                         prefix = ++pref;
1002                         params.pop_front();
1003                         params.pop_front();
1004                 }
1005                 else
1006                 {
1007                         prefix = "";
1008                         command = params[0];
1009                         params.pop_front();
1010                 }
1011
1012                 switch (this->LinkState)
1013                 {
1014                         TreeServer* Node;
1015
1016                         case WAIT_AUTH_1:
1017                                 // Waiting for SERVER command from remote server. Server initiating
1018                                 // the connection sends the first SERVER command, listening server
1019                                 // replies with theirs if its happy, then if the initiator is happy,
1020                                 // it starts to send its net sync, which starts the merge, otherwise
1021                                 // it sends an ERROR.
1022                                 if (command == "SERVER")
1023                                 {
1024                                         return this->Inbound_Server(params);
1025                                 }
1026                                 else if (command == "ERROR")
1027                                 {
1028                                         return this->Error(params);
1029                                 }
1030                         break;
1031                         case WAIT_AUTH_2:
1032                                 // Waiting for start of other side's netmerge to say they liked our
1033                                 // password.
1034                                 if (command == "SERVER")
1035                                 {
1036                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
1037                                         // silently ignore.
1038                                         return true;
1039                                 }
1040                                 else if (command == "BURST")
1041                                 {
1042                                         this->LinkState = CONNECTED;
1043                                         Node = new TreeServer(InboundServerName,InboundDescription,TreeRoot,this);
1044                                         TreeRoot->AddChild(Node);
1045                                         params.clear();
1046                                         params.push_back(InboundServerName);
1047                                         params.push_back("*");
1048                                         params.push_back("1");
1049                                         params.push_back(":"+InboundDescription);
1050                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
1051                                         this->DoBurst(Node);
1052                                 }
1053                                 else if (command == "ERROR")
1054                                 {
1055                                         return this->Error(params);
1056                                 }
1057
1058                         break;
1059                         case LISTENER:
1060                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
1061                                 return false;
1062                         break;
1063                         case CONNECTING:
1064                                 if (command == "SERVER")
1065                                 {
1066                                         // another server we connected to, which was in WAIT_AUTH_1 state,
1067                                         // has just sent us their credentials. If we get this far, theyre
1068                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
1069                                         // if we're happy with this, we should send our netburst which
1070                                         // kickstarts the merge.
1071                                         return this->Outbound_Reply_Server(params);
1072                                 }
1073                                 else if (command == "ERROR")
1074                                 {
1075                                         return this->Error(params);
1076                                 }
1077                         break;
1078                         case CONNECTED:
1079                                 // This is the 'authenticated' state, when all passwords
1080                                 // have been exchanged and anything past this point is taken
1081                                 // as gospel.
1082                                 std::string target = "";
1083                                 if ((command == "NICK") && (params.size() > 1))
1084                                 {
1085                                         return this->IntroduceClient(prefix,params);
1086                                 }
1087                                 else if (command == "FJOIN")
1088                                 {
1089                                         return this->ForceJoin(prefix,params);
1090                                 }
1091                                 else if (command == "SERVER")
1092                                 {
1093                                         return this->RemoteServer(prefix,params);
1094                                 }
1095                                 else if (command == "ERROR")
1096                                 {
1097                                         return this->Error(params);
1098                                 }
1099                                 else if (command == "OPERTYPE")
1100                                 {
1101                                         return this->OperType(prefix,params);
1102                                 }
1103                                 else if (command == "FMODE")
1104                                 {
1105                                         return this->ForceMode(prefix,params);
1106                                 }
1107                                 else if (command == "KILL")
1108                                 {
1109                                         return this->RemoteKill(prefix,params);
1110                                 }
1111                                 else if (command == "FTOPIC")
1112                                 {
1113                                         return this->ForceTopic(prefix,params);
1114                                 }
1115                                 else if (command == "REHASH")
1116                                 {
1117                                         return this->RemoteRehash(prefix,params);
1118                                 }
1119                                 else if (command == "SQUIT")
1120                                 {
1121                                         if (params.size() == 2)
1122                                         {
1123                                                 this->Squit(FindServer(params[0]),params[1]);
1124                                         }
1125                                         return true;
1126                                 }
1127                                 else
1128                                 {
1129                                         // not a special inter-server command.
1130                                         // Emulate the actual user doing the command,
1131                                         // this saves us having a huge ugly parser.
1132                                         userrec* who = Srv->FindNick(prefix);
1133                                         std::string sourceserv = this->myhost;
1134                                         if (this->InboundServerName != "")
1135                                         {
1136                                                 sourceserv = this->InboundServerName;
1137                                         }
1138                                         if (who)
1139                                         {
1140                                                 // its a user
1141                                                 target = who->server;
1142                                                 char* strparams[127];
1143                                                 for (unsigned int q = 0; q < params.size(); q++)
1144                                                 {
1145                                                         strparams[q] = (char*)params[q].c_str();
1146                                                 }
1147                                                 Srv->CallCommandHandler(command, strparams, params.size(), who);
1148                                         }
1149                                         else
1150                                         {
1151                                                 // its not a user. Its either a server, or somethings screwed up.
1152                                                 if (IsServer(prefix))
1153                                                 {
1154                                                         target = Srv->GetServerName();
1155                                                 }
1156                                                 else
1157                                                 {
1158                                                         log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
1159                                                         return true;
1160                                                 }
1161                                         }
1162                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1163
1164                                 }
1165                                 return true;
1166                         break;
1167                 }
1168                 return true;
1169         }
1170
1171         virtual std::string GetName()
1172         {
1173                 std::string sourceserv = this->myhost;
1174                 if (this->InboundServerName != "")
1175                 {
1176                         sourceserv = this->InboundServerName;
1177                 }
1178                 return sourceserv;
1179         }
1180
1181         virtual void OnTimeout()
1182         {
1183                 if (this->LinkState == CONNECTING)
1184                 {
1185                         Srv->SendOpers("*** CONNECT: Connection to \002"+myhost+"\002 timed out.");
1186                 }
1187         }
1188
1189         virtual void OnClose()
1190         {
1191                 // Connection closed.
1192                 // If the connection is fully up (state CONNECTED)
1193                 // then propogate a netsplit to all peers.
1194                 std::string quitserver = this->myhost;
1195                 if (this->InboundServerName != "")
1196                 {
1197                         quitserver = this->InboundServerName;
1198                 }
1199                 TreeServer* s = FindServer(quitserver);
1200                 if (s)
1201                 {
1202                         Squit(s,"Remote host closed the connection");
1203                 }
1204         }
1205
1206         virtual int OnIncomingConnection(int newsock, char* ip)
1207         {
1208                 TreeSocket* s = new TreeSocket(newsock, ip);
1209                 Srv->AddSocket(s);
1210                 return true;
1211         }
1212 };
1213
1214 void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
1215 {
1216         for (unsigned int c = 0; c < list.size(); c++)
1217         {
1218                 if (list[c] == server)
1219                 {
1220                         return;
1221                 }
1222         }
1223         list.push_back(server);
1224 }
1225
1226 // returns a list of DIRECT servernames for a specific channel
1227 std::deque<TreeServer*> GetListOfServersForChannel(chanrec* c)
1228 {
1229         std::deque<TreeServer*> list;
1230         std::vector<char*> *ulist = c->GetUsers();
1231         for (unsigned int i = 0; i < ulist->size(); i++)
1232         {
1233                 char* o = (*ulist)[i];
1234                 userrec* otheruser = (userrec*)o;
1235                 if (std::string(otheruser->server) != Srv->GetServerName())
1236                 {
1237                         TreeServer* best = BestRouteTo(otheruser->server);
1238                         if (best)
1239                                 AddThisServer(best,list);
1240                 }
1241         }
1242         return list;
1243 }
1244
1245 bool DoOneToAllButSenderRaw(std::string data,std::string omit,std::string prefix,std::string command,std::deque<std::string> params)
1246 {
1247         TreeServer* omitroute = BestRouteTo(omit);
1248         if ((command == "NOTICE") || (command == "PRIVMSG"))
1249         {
1250                 if (params.size() >= 2)
1251                 {
1252                         if (*(params[0].c_str()) != '#')
1253                         {
1254                                 // special routing for private messages/notices
1255                                 userrec* d = Srv->FindNick(params[0]);
1256                                 if (d)
1257                                 {
1258                                         std::deque<std::string> par;
1259                                         par.clear();
1260                                         par.push_back(params[0]);
1261                                         par.push_back(":"+params[1]);
1262                                         DoOneToOne(prefix,command,par,d->server);
1263                                         return true;
1264                                 }
1265                         }
1266                         else
1267                         {
1268                                 log(DEBUG,"Channel privmsg going to chan %s",params[0].c_str());
1269                                 chanrec* c = Srv->FindChannel(params[0]);
1270                                 if (c)
1271                                 {
1272                                         std::deque<TreeServer*> list = GetListOfServersForChannel(c);
1273                                         log(DEBUG,"Got a list of %d servers",list.size());
1274                                         for (unsigned int i = 0; i < list.size(); i++)
1275                                         {
1276                                                 TreeSocket* Sock = list[i]->GetSocket();
1277                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
1278                                                 {
1279                                                         log(DEBUG,"Writing privmsg to server %s",list[i]->GetName().c_str());
1280                                                         Sock->WriteLine(data);
1281                                                 }
1282                                         }
1283                                         return true;
1284                                 }
1285                         }
1286                 }
1287         }
1288         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1289         {
1290                 TreeServer* Route = TreeRoot->GetChild(x);
1291                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
1292                 {
1293                         TreeSocket* Sock = Route->GetSocket();
1294                         Sock->WriteLine(data);
1295                 }
1296         }
1297         return true;
1298 }
1299
1300 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> params, std::string omit)
1301 {
1302         TreeServer* omitroute = BestRouteTo(omit);
1303         std::string FullLine = ":" + prefix + " " + command;
1304         for (unsigned int x = 0; x < params.size(); x++)
1305         {
1306                 FullLine = FullLine + " " + params[x];
1307         }
1308         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1309         {
1310                 TreeServer* Route = TreeRoot->GetChild(x);
1311                 // Send the line IF:
1312                 // The route has a socket (its a direct connection)
1313                 // The route isnt the one to be omitted
1314                 // The route isnt the path to the one to be omitted
1315                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
1316                 {
1317                         TreeSocket* Sock = Route->GetSocket();
1318                         Sock->WriteLine(FullLine);
1319                 }
1320         }
1321         return true;
1322 }
1323
1324 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> params)
1325 {
1326         std::string FullLine = ":" + prefix + " " + command;
1327         for (unsigned int x = 0; x < params.size(); x++)
1328         {
1329                 FullLine = FullLine + " " + params[x];
1330         }
1331         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
1332         {
1333                 TreeServer* Route = TreeRoot->GetChild(x);
1334                 if (Route->GetSocket())
1335                 {
1336                         TreeSocket* Sock = Route->GetSocket();
1337                         Sock->WriteLine(FullLine);
1338                 }
1339         }
1340         return true;
1341 }
1342
1343 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> params, std::string target)
1344 {
1345         TreeServer* Route = BestRouteTo(target);
1346         if (Route)
1347         {
1348                 std::string FullLine = ":" + prefix + " " + command;
1349                 for (unsigned int x = 0; x < params.size(); x++)
1350                 {
1351                         FullLine = FullLine + " " + params[x];
1352                 }
1353                 if (Route->GetSocket())
1354                 {
1355                         TreeSocket* Sock = Route->GetSocket();
1356                         Sock->WriteLine(FullLine);
1357                 }
1358                 return true;
1359         }
1360         else
1361         {
1362                 return true;
1363         }
1364 }
1365
1366 std::vector<TreeSocket*> Bindings;
1367
1368 void ReadConfiguration(bool rebind)
1369 {
1370         if (rebind)
1371         {
1372                 for (int j =0; j < Conf->Enumerate("bind"); j++)
1373                 {
1374                         std::string Type = Conf->ReadValue("bind","type",j);
1375                         std::string IP = Conf->ReadValue("bind","address",j);
1376                         long Port = Conf->ReadInteger("bind","port",j,true);
1377                         if (Type == "servers")
1378                         {
1379                                 if (IP == "*")
1380                                 {
1381                                         IP = "";
1382                                 }
1383                                 TreeSocket* listener = new TreeSocket(IP.c_str(),Port,true,10);
1384                                 if (listener->GetState() == I_LISTENING)
1385                                 {
1386                                         Srv->AddSocket(listener);
1387                                         Bindings.push_back(listener);
1388                                 }
1389                                 else
1390                                 {
1391                                         log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
1392                                         listener->Close();
1393                                         delete listener;
1394                                 }
1395                         }
1396                 }
1397         }
1398         LinkBlocks.clear();
1399         for (int j =0; j < Conf->Enumerate("link"); j++)
1400         {
1401                 Link L;
1402                 L.Name = Conf->ReadValue("link","name",j);
1403                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
1404                 L.Port = Conf->ReadInteger("link","port",j,true);
1405                 L.SendPass = Conf->ReadValue("link","sendpass",j);
1406                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
1407                 LinkBlocks.push_back(L);
1408                 log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
1409         }
1410 }
1411
1412
1413 class ModuleSpanningTree : public Module
1414 {
1415         std::vector<TreeSocket*> Bindings;
1416         int line;
1417         int NumServers;
1418
1419  public:
1420
1421         ModuleSpanningTree()
1422         {
1423                 Srv = new Server;
1424                 Conf = new ConfigReader;
1425                 Bindings.clear();
1426
1427                 // Create the root of the tree
1428                 TreeRoot = new TreeServer(Srv->GetServerName(),Srv->GetServerDescription());
1429
1430                 ReadConfiguration(true);
1431         }
1432
1433         void ShowLinks(TreeServer* Current, userrec* user, int hops)
1434         {
1435                 std::string Parent = TreeRoot->GetName();
1436                 if (Current->GetParent())
1437                 {
1438                         Parent = Current->GetParent()->GetName();
1439                 }
1440                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1441                 {
1442                         ShowLinks(Current->GetChild(q),user,hops+1);
1443                 }
1444                 WriteServ(user->fd,"364 %s %s %s :%d %s",user->nick,Current->GetName().c_str(),Parent.c_str(),hops,Current->GetDesc().c_str());
1445         }
1446
1447         int CountLocalServs()
1448         {
1449                 return TreeRoot->ChildCount();
1450         }
1451
1452         void CountServsRecursive(TreeServer* Current)
1453         {
1454                 NumServers++;
1455                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1456                 {
1457                         CountServsRecursive(Current->GetChild(q));
1458                 }
1459         }
1460
1461         int CountServs()
1462         {
1463                 NumServers = 0;
1464                 CountServsRecursive(TreeRoot);
1465                 return NumServers;
1466         }
1467
1468         void HandleLinks(char** parameters, int pcnt, userrec* user)
1469         {
1470                 ShowLinks(TreeRoot,user,0);
1471                 WriteServ(user->fd,"365 %s * :End of /LINKS list.",user->nick);
1472                 return;
1473         }
1474
1475         void HandleLusers(char** parameters, int pcnt, userrec* user)
1476         {
1477                 WriteServ(user->fd,"251 %s :There are %d users and %d invisible on %d servers",user->nick,usercnt()-usercount_invisible(),usercount_invisible(),this->CountServs());
1478                 WriteServ(user->fd,"252 %s %d :operator(s) online",user->nick,usercount_opers());
1479                 WriteServ(user->fd,"253 %s %d :unknown connections",user->nick,usercount_unknown());
1480                 WriteServ(user->fd,"254 %s %d :channels formed",user->nick,chancount());
1481                 WriteServ(user->fd,"254 %s :I have %d clients and %d servers",user->nick,local_count(),this->CountLocalServs());
1482                 return;
1483         }
1484
1485         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
1486
1487         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80])
1488         {
1489                 if (line < 128)
1490                 {
1491                         for (int t = 0; t < depth; t++)
1492                         {
1493                                 matrix[line][t] = ' ';
1494                         }
1495                         strlcpy(&matrix[line][depth],Current->GetName().c_str(),80);
1496                         line++;
1497                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
1498                         {
1499                                 ShowMap(Current->GetChild(q),user,depth+2,matrix);
1500                         }
1501                 }
1502         }
1503
1504         // Ok, prepare to be confused.
1505         // After much mulling over how to approach this, it struck me that
1506         // the 'usual' way of doing a /MAP isnt the best way. Instead of
1507         // keeping track of a ton of ascii characters, and line by line
1508         // under recursion working out where to place them using multiplications
1509         // and divisons, we instead render the map onto a backplane of characters
1510         // (a character matrix), then draw the branches as a series of "L" shapes
1511         // from the nodes. This is not only friendlier on CPU it uses less stack.
1512
1513         void HandleMap(char** parameters, int pcnt, userrec* user)
1514         {
1515                 // This array represents a virtual screen which we will
1516                 // "scratch" draw to, as the console device of an irc
1517                 // client does not provide for a proper terminal.
1518                 char matrix[128][80];
1519                 for (unsigned int t = 0; t < 128; t++)
1520                 {
1521                         matrix[t][0] = '\0';
1522                 }
1523                 line = 0;
1524                 // The only recursive bit is called here.
1525                 ShowMap(TreeRoot,user,0,matrix);
1526                 // Process each line one by one. The algorithm has a limit of
1527                 // 128 servers (which is far more than a spanning tree should have
1528                 // anyway, so we're ok). This limit can be raised simply by making
1529                 // the character matrix deeper, 128 rows taking 10k of memory.
1530                 for (int l = 1; l < line; l++)
1531                 {
1532                         // scan across the line looking for the start of the
1533                         // servername (the recursive part of the algorithm has placed
1534                         // the servers at indented positions depending on what they
1535                         // are related to)
1536                         int first_nonspace = 0;
1537                         while (matrix[l][first_nonspace] == ' ')
1538                         {
1539                                 first_nonspace++;
1540                         }
1541                         first_nonspace--;
1542                         // Draw the `- (corner) section: this may be overwritten by
1543                         // another L shape passing along the same vertical pane, becoming
1544                         // a |- (branch) section instead.
1545                         matrix[l][first_nonspace] = '-';
1546                         matrix[l][first_nonspace-1] = '`';
1547                         int l2 = l - 1;
1548                         // Draw upwards until we hit the parent server, causing possibly
1549                         // other corners (`-) to become branches (|-)
1550                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
1551                         {
1552                                 matrix[l2][first_nonspace-1] = '|';
1553                                 l2--;
1554                         }
1555                 }
1556                 // dump the whole lot to the user. This is the easy bit, honest.
1557                 for (int t = 0; t < line; t++)
1558                 {
1559                         WriteServ(user->fd,"006 %s :%s",user->nick,&matrix[t][0]);
1560                 }
1561                 WriteServ(user->fd,"007 %s :End of /MAP",user->nick);
1562                 return;
1563         }
1564
1565         int HandleSquit(char** parameters, int pcnt, userrec* user)
1566         {
1567                 return 1;
1568         }
1569
1570         int HandleConnect(char** parameters, int pcnt, userrec* user)
1571         {
1572                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
1573                 {
1574                         if (Srv->MatchText(x->Name.c_str(),parameters[0]))
1575                         {
1576                                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: Connecting to server: %s (%s:%d)",user->nick,x->Name.c_str(),x->IPAddr.c_str(),x->Port);
1577                                 TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name);
1578                                 Srv->AddSocket(newsocket);
1579                                 return 1;
1580                         }
1581                 }
1582                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: No matching server could be found in the config file.",user->nick);
1583                 return 1;
1584         }
1585
1586         virtual int OnPreCommand(std::string command, char **parameters, int pcnt, userrec *user)
1587         {
1588                 if (command == "CONNECT")
1589                 {
1590                         return this->HandleConnect(parameters,pcnt,user);
1591                 }
1592                 else if (command == "SQUIT")
1593                 {
1594                         return this->HandleSquit(parameters,pcnt,user);
1595                 }
1596                 else if (command == "MAP")
1597                 {
1598                         this->HandleMap(parameters,pcnt,user);
1599                         return 1;
1600                 }
1601                 else if (command == "LUSERS")
1602                 {
1603                         this->HandleLusers(parameters,pcnt,user);
1604                         return 1;
1605                 }
1606                 else if (command == "LINKS")
1607                 {
1608                         this->HandleLinks(parameters,pcnt,user);
1609                         return 1;
1610                 }
1611                 else if (Srv->IsValidModuleCommand(command, pcnt, user))
1612                 {
1613                         // this bit of code cleverly routes all module commands
1614                         // to all remote severs *automatically* so that modules
1615                         // can just handle commands locally, without having
1616                         // to have any special provision in place for remote
1617                         // commands and linking protocols.
1618                         std::deque<std::string> params;
1619                         params.clear();
1620                         for (int j = 0; j < pcnt; j++)
1621                         {
1622                                 if (strchr(parameters[j],' '))
1623                                 {
1624                                         params.push_back(":" + std::string(parameters[j]));
1625                                 }
1626                                 else
1627                                 {
1628                                         params.push_back(std::string(parameters[j]));
1629                                 }
1630                         }
1631                         DoOneToMany(user->nick,command,params);
1632                 }
1633                 return 0;
1634         }
1635
1636         virtual void OnGetServerDescription(std::string servername,std::string &description)
1637         {
1638                 TreeServer* s = FindServer(servername);
1639                 if (s)
1640                 {
1641                         description = s->GetDesc();
1642                 }
1643         }
1644
1645         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
1646         {
1647                 if (std::string(source->server) == Srv->GetServerName())
1648                 {
1649                         std::deque<std::string> params;
1650                         params.push_back(dest->nick);
1651                         params.push_back(channel->name);
1652                         DoOneToMany(source->nick,"INVITE",params);
1653                 }
1654         }
1655
1656         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, std::string topic)
1657         {
1658                 std::deque<std::string> params;
1659                 params.push_back(chan->name);
1660                 params.push_back(":"+topic);
1661                 DoOneToMany(user->nick,"TOPIC",params);
1662         }
1663
1664         virtual void OnUserNotice(userrec* user, void* dest, int target_type, std::string text)
1665         {
1666                 if (target_type == TYPE_USER)
1667                 {
1668                         userrec* d = (userrec*)dest;
1669                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
1670                         {
1671                                 std::deque<std::string> params;
1672                                 params.clear();
1673                                 params.push_back(d->nick);
1674                                 params.push_back(":"+text);
1675                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
1676                         }
1677                 }
1678                 else
1679                 {
1680                         if (std::string(user->server) == Srv->GetServerName())
1681                         {
1682                                 chanrec *c = (chanrec*)dest;
1683                                 std::deque<TreeServer*> list = GetListOfServersForChannel(c);
1684                                 for (unsigned int i = 0; i < list.size(); i++)
1685                                 {
1686                                         TreeSocket* Sock = list[i]->GetSocket();
1687                                         if (Sock)
1688                                                 Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+std::string(c->name)+" :"+text);
1689                                 }
1690                         }
1691                 }
1692         }
1693
1694         virtual void OnUserMessage(userrec* user, void* dest, int target_type, std::string text)
1695         {
1696                 if (target_type == TYPE_USER)
1697                 {
1698                         // route private messages which are targetted at clients only to the server
1699                         // which needs to receive them
1700                         userrec* d = (userrec*)dest;
1701                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
1702                         {
1703                                 std::deque<std::string> params;
1704                                 params.clear();
1705                                 params.push_back(d->nick);
1706                                 params.push_back(":"+text);
1707                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
1708                         }
1709                 }
1710                 else
1711                 {
1712                         if (std::string(user->server) == Srv->GetServerName())
1713                         {
1714                                 chanrec *c = (chanrec*)dest;
1715                                 std::deque<TreeServer*> list = GetListOfServersForChannel(c);
1716                                 for (unsigned int i = 0; i < list.size(); i++)
1717                                 {
1718                                         TreeSocket* Sock = list[i]->GetSocket();
1719                                         if (Sock)
1720                                                 Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+std::string(c->name)+" :"+text);
1721                                 }
1722                         }
1723                 }
1724         }
1725
1726         virtual void OnUserJoin(userrec* user, chanrec* channel)
1727         {
1728                 // Only do this for local users
1729                 if (std::string(user->server) == Srv->GetServerName())
1730                 {
1731                         std::deque<std::string> params;
1732                         params.clear();
1733                         params.push_back(channel->name);
1734                         if (*channel->key)
1735                         {
1736                                 // if the channel has a key, force the join by emulating the key.
1737                                 params.push_back(channel->key);
1738                         }
1739                         if (channel->GetUserCounter() > 1)
1740                         {
1741                                 // not the first in the channel
1742                                 DoOneToMany(user->nick,"JOIN",params);
1743                         }
1744                         else
1745                         {
1746                                 // first in the channel, set up their permissions
1747                                 // and the channel TS with FJOIN.
1748                                 char ts[24];
1749                                 snprintf(ts,24,"%lu",(unsigned long)channel->age);
1750                                 params.clear();
1751                                 params.push_back(channel->name);
1752                                 params.push_back(ts);
1753                                 params.push_back("@"+std::string(user->nick));
1754                                 DoOneToMany(Srv->GetServerName(),"FJOIN",params);
1755                         }
1756                 }
1757         }
1758
1759         virtual void OnUserPart(userrec* user, chanrec* channel)
1760         {
1761                 if (std::string(user->server) == Srv->GetServerName())
1762                 {
1763                         std::deque<std::string> params;
1764                         params.clear();
1765                         params.push_back(channel->name);
1766                         DoOneToMany(user->nick,"PART",params);
1767                 }
1768         }
1769
1770         virtual void OnUserConnect(userrec* user)
1771         {
1772                 char agestr[MAXBUF];
1773                 if (std::string(user->server) == Srv->GetServerName())
1774                 {
1775                         std::deque<std::string> params;
1776                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
1777                         params.clear();
1778                         params.push_back(agestr);
1779                         params.push_back(user->nick);
1780                         params.push_back(user->host);
1781                         params.push_back(user->dhost);
1782                         params.push_back(user->ident);
1783                         params.push_back("+"+std::string(user->modes));
1784                         params.push_back(user->ip);
1785                         params.push_back(":"+std::string(user->fullname));
1786                         DoOneToMany(Srv->GetServerName(),"NICK",params);
1787                 }
1788         }
1789
1790         virtual void OnUserQuit(userrec* user, std::string reason)
1791         {
1792                 if (std::string(user->server) == Srv->GetServerName())
1793                 {
1794                         std::deque<std::string> params;
1795                         params.push_back(":"+reason);
1796                         DoOneToMany(user->nick,"QUIT",params);
1797                 }
1798         }
1799
1800         virtual void OnUserPostNick(userrec* user, std::string oldnick)
1801         {
1802                 if (std::string(user->server) == Srv->GetServerName())
1803                 {
1804                         std::deque<std::string> params;
1805                         params.push_back(user->nick);
1806                         DoOneToMany(oldnick,"NICK",params);
1807                 }
1808         }
1809
1810         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, std::string reason)
1811         {
1812                 if (std::string(source->server) == Srv->GetServerName())
1813                 {
1814                         std::deque<std::string> params;
1815                         params.push_back(chan->name);
1816                         params.push_back(user->nick);
1817                         params.push_back(":"+reason);
1818                         DoOneToMany(source->nick,"KICK",params);
1819                 }
1820         }
1821
1822         virtual void OnRemoteKill(userrec* source, userrec* dest, std::string reason)
1823         {
1824                 std::deque<std::string> params;
1825                 params.push_back(dest->nick);
1826                 params.push_back(":"+reason);
1827                 DoOneToMany(source->nick,"KILL",params);
1828         }
1829
1830         virtual void OnRehash(std::string parameter)
1831         {
1832                 if (parameter != "")
1833                 {
1834                         std::deque<std::string> params;
1835                         params.push_back(parameter);
1836                         DoOneToMany(Srv->GetServerName(),"REHASH",params);
1837                         // check for self
1838                         if (Srv->MatchText(Srv->GetServerName(),parameter))
1839                         {
1840                                 Srv->SendOpers("*** Remote rehash initiated from server \002"+Srv->GetServerName()+"\002.");
1841                                 Srv->RehashServer();
1842                         }
1843                 }
1844                 ReadConfiguration(false);
1845         }
1846
1847         // note: the protocol does not allow direct umode +o except
1848         // via NICK with 8 params. sending OPERTYPE infers +o modechange
1849         // locally.
1850         virtual void OnOper(userrec* user, std::string opertype)
1851         {
1852                 if (std::string(user->server) == Srv->GetServerName())
1853                 {
1854                         std::deque<std::string> params;
1855                         params.push_back(opertype);
1856                         DoOneToMany(user->nick,"OPERTYPE",params);
1857                 }
1858         }
1859
1860         virtual void OnMode(userrec* user, void* dest, int target_type, std::string text)
1861         {
1862                 if (std::string(user->server) == Srv->GetServerName())
1863                 {
1864                         if (target_type == TYPE_USER)
1865                         {
1866                                 userrec* u = (userrec*)dest;
1867                                 std::deque<std::string> params;
1868                                 params.push_back(u->nick);
1869                                 params.push_back(text);
1870                                 DoOneToMany(user->nick,"MODE",params);
1871                         }
1872                         else
1873                         {
1874                                 chanrec* c = (chanrec*)dest;
1875                                 std::deque<std::string> params;
1876                                 params.push_back(c->name);
1877                                 params.push_back(text);
1878                                 DoOneToMany(user->nick,"MODE",params);
1879                         }
1880                 }
1881         }
1882
1883         virtual void ProtoSendMode(void* opaque, int target_type, void* target, std::string modeline)
1884         {
1885                 TreeSocket* s = (TreeSocket*)opaque;
1886                 if (target)
1887                 {
1888                         if (target_type == TYPE_USER)
1889                         {
1890                                 userrec* u = (userrec*)target;
1891                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+u->nick+" "+modeline);
1892                         }
1893                         else
1894                         {
1895                                 chanrec* c = (chanrec*)target;
1896                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+modeline);
1897                         }
1898                 }
1899         }
1900
1901         virtual ~ModuleSpanningTree()
1902         {
1903                 delete Srv;
1904         }
1905
1906         virtual Version GetVersion()
1907         {
1908                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
1909         }
1910 };
1911
1912
1913 class ModuleSpanningTreeFactory : public ModuleFactory
1914 {
1915  public:
1916         ModuleSpanningTreeFactory()
1917         {
1918         }
1919
1920         ~ModuleSpanningTreeFactory()
1921         {
1922         }
1923
1924         virtual Module * CreateModule()
1925         {
1926                 TreeProtocolModule = new ModuleSpanningTree;
1927                 return TreeProtocolModule;
1928         }
1929
1930 };
1931
1932
1933 extern "C" void * init_module( void )
1934 {
1935         return new ModuleSpanningTreeFactory;
1936 }