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 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  46
  47 typedef nspace::hash_map<std::string, userrec*, nspace::hash<string>, irc::StrHashComp> user_hash;
  48 extern user_hash clientlist;
  49
  50 const char* OneToEither[] = { "PRIVMSG", "NOTICE", NULL };
  51 const char* OneToMany[] = { "NICK", "QUIT", "JOIN", "PART", "MODE", "INVITE", "KICK", "KILL", NULL };
  52 const char* OneToOne[] = { "REHASH", "DIE", "TRACE", "WHOIS", NULL };
  53
  54 class TreeServer;
  55 class TreeSocket;
  56
  57 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> params, std::string target);
  58 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> params, std::string omit);
  59 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> params);
  60
  61 class TreeServer
  62 {
  63         TreeServer* Parent;
  64         std::vector<TreeServer*> Children;
  65         std::string ServerName;
  66         std::string ServerDesc;
  67         std::string VersionString;
  68         int UserCount;
  69         int OperCount;
  70         TreeSocket* Socket;     // for directly connected servers this points at the socket object
  71
  72  public:
  73
  74         TreeServer()
  75         {
  76                 Parent = NULL;
  77                 ServerName = "";
  78                 ServerDesc = "";
  79                 VersionString = "";
  80                 UserCount = OperCount = 0;
  81         }
  82
  83         TreeServer(std::string Name, std::string Desc) : ServerName(Name), ServerDesc(Desc)
  84         {
  85                 Parent = NULL;
  86                 VersionString = "";
  87                 UserCount = OperCount = 0;
  88         }
  89
  90         TreeServer(std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock) : Parent(Above), ServerName(Name), ServerDesc(Desc), Socket(Sock)
  91         {
  92                 VersionString = "";
  93                 UserCount = OperCount = 0;
  94         }
  95
  96         std::string GetName()
  97         {
  98                 return this->ServerName;
  99         }
 100
 101         std::string GetDesc()
 102         {
 103                 return this->ServerDesc;
 104         }
 105
 106         std::string GetVersion()
 107         {
 108                 return this->VersionString;
 109         }
 110
 111         int GetUserCount()
 112         {
 113                 return this->UserCount;
 114         }
 115
 116         int GetOperCount()
 117         {
 118                 return this->OperCount;
 119         }
 120
 121         TreeSocket* GetSocket()
 122         {
 123                 return this->Socket;
 124         }
 125
 126         TreeServer* GetParent()
 127         {
 128                 return this->Parent;
 129         }
 130
 131         unsigned int ChildCount()
 132         {
 133                 return Children.size();
 134         }
 135
 136         TreeServer* GetChild(unsigned int n)
 137         {
 138                 if (n < Children.size())
 139                 {
 140                         return Children[n];
 141                 }
 142                 else
 143                 {
 144                         return NULL;
 145                 }
 146         }
 147
 148         void AddChild(TreeServer* Child)
 149         {
 150                 Children.push_back(Child);
 151         }
 152
 153         bool DelChild(TreeServer* Child)
 154         {
 155                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 156                 {
 157                         if (*a == Child)
 158                         {
 159                                 Children.erase(a);
 160                                 return true;
 161                         }
 162                 }
 163                 return false;
 164         }
 165 };
 166
 167 class Link
 168 {
 169  public:
 170          std::string Name;
 171          std::string IPAddr;
 172          int Port;
 173          std::string SendPass;
 174          std::string RecvPass;
 175 };
 176
 177 /* $ModDesc: Povides a spanning tree server link protocol */
 178
 179 Server *Srv;
 180 ConfigReader *Conf;
 181 TreeServer *TreeRoot;
 182 std::vector<Link> LinkBlocks;
 183
 184 TreeServer* RouteEnumerate(TreeServer* Current, std::string ServerName)
 185 {
 186         if (Current->GetName() == ServerName)
 187                 return Current;
 188         for (unsigned int q = 0; q < Current->ChildCount(); q++)
 189         {
 190                 TreeServer* found = RouteEnumerate(Current->GetChild(q),ServerName);
 191                 if (found)
 192                 {
 193                         return found;
 194                 }
 195         }
 196         return NULL;
 197 }
 198
 199 // Returns the locally connected server we must route a
 200 // message through to reach server 'ServerName'. This
 201 // only applies to one-to-one and not one-to-many routing.
 202 TreeServer* BestRouteTo(std::string ServerName)
 203 {
 204         log(DEBUG,"Finding best route to %s",ServerName.c_str());
 205         // first, find the server by recursively walking the tree
 206         TreeServer* Found = RouteEnumerate(TreeRoot,ServerName);
 207         // did we find it? If not, they did something wrong, abort.
 208         if (!Found)
 209         {
 210                 log(DEBUG,"Failed to find %s by walking tree!",ServerName.c_str());
 211                 return NULL;
 212         }
 213         else
 214         {
 215                 // The server exists, follow its parent nodes until
 216                 // the parent of the current is 'TreeRoot', we know
 217                 // then that this is a directly-connected server.
 218                 while ((Found) && (Found->GetParent() != TreeRoot))
 219                 {
 220                         Found = Found->GetParent();
 221                 }
 222                 log(DEBUG,"Route to %s is via %s",ServerName.c_str(),Found->GetName().c_str());
 223                 return Found;
 224         }
 225 }
 226
 227 bool LookForServer(TreeServer* Current, std::string ServerName)
 228 {
 229         if (ServerName == Current->GetName())
 230                 return true;
 231         for (unsigned int q = 0; q < Current->ChildCount(); q++)
 232         {
 233                 if (LookForServer(Current->GetChild(q),ServerName))
 234                         return true;
 235         }
 236         return false;
 237 }
 238
 239 bool IsServer(std::string ServerName)
 240 {
 241         return LookForServer(TreeRoot,ServerName);
 242 }
 243
 244 class TreeSocket : public InspSocket
 245 {
 246         std::string myhost;
 247         std::string in_buffer;
 248         ServerState LinkState;
 249         std::string InboundServerName;
 250         std::string InboundDescription;
 251
 252  public:
 253
 254         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime)
 255                 : InspSocket(host, port, listening, maxtime)
 256         {
 257                 Srv->Log(DEBUG,"Create new listening");
 258                 myhost = host;
 259                 this->LinkState = LISTENER;
 260         }
 261
 262         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 263                 : InspSocket(host, port, listening, maxtime)
 264         {
 265                 Srv->Log(DEBUG,"Create new outbound");
 266                 myhost = ServerName;
 267                 this->LinkState = CONNECTING;
 268         }
 269
 270         TreeSocket(int newfd, char* ip)
 271                 : InspSocket(newfd, ip)
 272         {
 273                 Srv->Log(DEBUG,"Associate new inbound");
 274                 this->LinkState = WAIT_AUTH_1;
 275         }
 276
 277         virtual bool OnConnected()
 278         {
 279                 if (this->LinkState == CONNECTING)
 280                 {
 281                         Srv->SendOpers("*** Connection to "+myhost+"["+this->GetIP()+"] established.");
 282                         // we should send our details here.
 283                         // if the other side is satisfied, they send theirs.
 284                         // we do not need to change state here.
 285                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 286                         {
 287                                 if (x->Name == this->myhost)
 288                                 {
 289                                         // found who we're supposed to be connecting to, send the neccessary gubbins.
 290                                         this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 291                                         return true;
 292                                 }
 293                         }
 294                 }
 295                 log(DEBUG,"Outbound connection ERROR: Could not find the right link block!");
 296                 return true;
 297         }
 298
 299         virtual void OnError(InspSocketError e)
 300         {
 301         }
 302
 303         virtual int OnDisconnect()
 304         {
 305                 return true;
 306         }
 307
 308         // recursively send the server tree with distances as hops
 309         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 310         {
 311                 char command[1024];
 312                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 313                 {
 314                         TreeServer* recursive_server = Current->GetChild(q);
 315                         if (recursive_server != s)
 316                         {
 317                                 // :source.server SERVER server.name hops :Description
 318                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 319                                 this->WriteLine(command);
 320                                 // down to next level
 321                                 this->SendServers(recursive_server, s, hops+1);
 322                         }
 323                 }
 324         }
 325
 326         bool IntroduceClient(std::string source, std::deque<std::string> params)
 327         {
 328                 // NICK age nick host dhost ident +modes ip :gecos
 329                 //       0   1    2    3      4     5    6   7
 330                 std::string nick = params[1];
 331                 std::string host = params[2];
 332                 std::string dhost = params[3];
 333                 std::string ident = params[4];
 334                 time_t age = atoi(params[0].c_str());
 335                 std::string modes = params[5];
 336                 std::string ip = params[6];
 337                 std::string gecos = params[7];
 338                 char* tempnick = (char*)nick.c_str();
 339                 log(DEBUG,"Introduce client %s!%s@%s",tempnick,ident.c_str(),host.c_str());
 340
 341                 user_hash::iterator iter;
 342                 iter = clientlist.find(tempnick);
 343                 if (iter != clientlist.end())
 344                 {
 345                         // nick collision
 346                         log(DEBUG,"Nick collision on %s!%s@%s",tempnick,ident.c_str(),host.c_str());
 347                         return true;
 348                 }
 349
 350                 clientlist[tempnick] = new userrec();
 351                 clientlist[tempnick]->fd = FD_MAGIC_NUMBER;
 352                 strlcpy(clientlist[tempnick]->nick, tempnick,NICKMAX);
 353                 strlcpy(clientlist[tempnick]->host, host.c_str(),160);
 354                 strlcpy(clientlist[tempnick]->dhost, dhost.c_str(),160);
 355                 clientlist[tempnick]->server = (char*)FindServerNamePtr(source.c_str());
 356                 strlcpy(clientlist[tempnick]->ident, ident.c_str(),IDENTMAX);
 357                 strlcpy(clientlist[tempnick]->fullname, gecos.c_str(),MAXGECOS);
 358                 clientlist[tempnick]->registered = 7;
 359                 clientlist[tempnick]->signon = age;
 360                 strlcpy(clientlist[tempnick]->ip,ip.c_str(),16);
 361                 for (int i = 0; i < MAXCHANS; i++)
 362                 {
 363                         clientlist[tempnick]->chans[i].channel = NULL;
 364                         clientlist[tempnick]->chans[i].uc_modes = 0;
 365                 }
 366                 DoOneToAllButSender(source,"NICK",params,source);
 367                 return true;
 368         }
 369
 370         // send all users and their channels
 371         void SendUsers(TreeServer* Current)
 372         {
 373                 char data[MAXBUF];
 374                 for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 375                 {
 376                         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);
 377                         this->WriteLine(data);
 378                         if (strchr(u->second->modes,'o'))
 379                         {
 380                                 this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
 381                         }
 382                         char* chl = chlist(u->second,u->second);
 383                         if (*chl)
 384                         {
 385                                 this->WriteLine(":"+std::string(u->second->nick)+" FJOIN "+std::string(chl));
 386                         }
 387                 }
 388         }
 389
 390         void DoBurst(TreeServer* s)
 391         {
 392                 log(DEBUG,"Beginning network burst");
 393                 Srv->SendOpers("*** Bursting to "+s->GetName()+".");
 394                 this->WriteLine("BURST");
 395                 // Send server tree
 396                 this->SendServers(TreeRoot,s,1);
 397                 // Send users and their channels
 398                 this->SendUsers(s);
 399                 // TODO: Send everything else (channel modes etc)
 400                 this->WriteLine("ENDBURST");
 401         }
 402
 403         virtual bool OnDataReady()
 404         {
 405                 char* data = this->Read();
 406                 if (data)
 407                 {
 408                         this->in_buffer += data;
 409                         while (in_buffer.find("\n") != std::string::npos)
 410                         {
 411                                 char* line = (char*)in_buffer.c_str();
 412                                 std::string ret = "";
 413                                 while ((*line != '\n') && (strlen(line)))
 414                                 {
 415                                         ret = ret + *line;
 416                                         line++;
 417                                 }
 418                                 if ((*line == '\n') || (*line == '\r'))
 419                                         line++;
 420                                 in_buffer = line;
 421                                 if (!this->ProcessLine(ret))
 422                                 {
 423                                         return false;
 424                                 }
 425                         }
 426                 }
 427                 return (data != NULL);
 428         }
 429
 430         int WriteLine(std::string line)
 431         {
 432                 return this->Write(line + "\r\n");
 433         }
 434
 435         bool Error(std::deque<std::string> params)
 436         {
 437                 if (params.size() < 1)
 438                         return false;
 439                 std::string Errmsg = params[0];
 440                 std::string SName = myhost;
 441                 if (InboundServerName != "")
 442                 {
 443                         SName = InboundServerName;
 444                 }
 445                 Srv->SendOpers("*** ERROR from "+SName+": "+Errmsg);
 446                 // we will return false to cause the socket to close.
 447                 return false;
 448         }
 449
 450         bool Outbound_Reply_Server(std::deque<std::string> params)
 451         {
 452                 if (params.size() < 4)
 453                         return false;
 454                 std::string servername = params[0];
 455                 std::string password = params[1];
 456                 int hops = atoi(params[2].c_str());
 457                 if (hops)
 458                 {
 459                         this->WriteLine("ERROR :Server too far away for authentication");
 460                         return false;
 461                 }
 462                 std::string description = params[3];
 463                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 464                 {
 465                         if ((x->Name == servername) && (x->RecvPass == password))
 466                         {
 467                                 // Begin the sync here. this kickstarts the
 468                                 // other side, waiting in WAIT_AUTH_2 state,
 469                                 // into starting their burst, as it shows
 470                                 // that we're happy.
 471                                 this->LinkState = CONNECTED;
 472                                 // we should add the details of this server now
 473                                 // to the servers tree, as a child of the root
 474                                 // node.
 475                                 TreeServer* Node = new TreeServer(servername,description,TreeRoot,this);
 476                                 TreeRoot->AddChild(Node);
 477                                 this->DoBurst(Node);
 478                                 return true;
 479                         }
 480                 }
 481                 this->WriteLine("ERROR :Invalid credentials");
 482                 return false;
 483         }
 484
 485         bool Inbound_Server(std::deque<std::string> params)
 486         {
 487                 if (params.size() < 4)
 488                         return false;
 489                 std::string servername = params[0];
 490                 std::string password = params[1];
 491                 int hops = atoi(params[2].c_str());
 492                 if (hops)
 493                 {
 494                         this->WriteLine("ERROR :Server too far away for authentication");
 495                         return false;
 496                 }
 497                 std::string description = params[3];
 498                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 499                 {
 500                         if ((x->Name == servername) && (x->RecvPass == password))
 501                         {
 502                                 Srv->SendOpers("*** Verified incoming server connection from "+servername+"["+this->GetIP()+"] ("+description+")");
 503                                 this->InboundServerName = servername;
 504                                 this->InboundDescription = description;
 505                                 // this is good. Send our details: Our server name and description and hopcount of 0,
 506                                 // along with the sendpass from this block.
 507                                 this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 508                                 // move to the next state, we are now waiting for THEM.
 509                                 this->LinkState = WAIT_AUTH_2;
 510                                 return true;
 511                         }
 512                 }
 513                 this->WriteLine("ERROR :Invalid credentials");
 514                 return false;
 515         }
 516
 517         std::deque<std::string> Split(std::string line)
 518         {
 519                 std::deque<std::string> n;
 520                 std::stringstream s(line);
 521                 std::string param = "";
 522                 n.clear();
 523                 int item = 0;
 524                 while (!s.eof())
 525                 {
 526                         s >> param;
 527                         if ((param.c_str()[0] == ':') && (item))
 528                         {
 529                                 char* str = (char*)param.c_str();
 530                                 str++;
 531                                 param = str;
 532                                 std::string append;
 533                                 while (!s.eof())
 534                                 {
 535                                         append = "";
 536                                         s >> append;
 537                                         if (append != "")
 538                                         {
 539                                                 param = param + " " + append;
 540                                         }
 541                                 }
 542                         }
 543                         item++;
 544                         n.push_back(param);
 545                 }
 546                 return n;
 547         }
 548
 549         bool ProcessLine(std::string line)
 550         {
 551                 Srv->SendToModeMask("o",WM_AND,"inbound-line: '"+line+"'");
 552
 553                 std::deque<std::string> params = this->Split(line);
 554                 std::string command = "";
 555                 std::string prefix = "";
 556                 if (((params[0].c_str())[0] == ':') && (params.size() > 1))
 557                 {
 558                         prefix = params[0];
 559                         command = params[1];
 560                         char* pref = (char*)prefix.c_str();
 561                         prefix = ++pref;
 562                         params.pop_front();
 563                         params.pop_front();
 564                 }
 565                 else
 566                 {
 567                         prefix = "";
 568                         command = params[0];
 569                         params.pop_front();
 570                 }
 571
 572                 switch (this->LinkState)
 573                 {
 574                         TreeServer* Node;
 575
 576                         case WAIT_AUTH_1:
 577                                 // Waiting for SERVER command from remote server. Server initiating
 578                                 // the connection sends the first SERVER command, listening server
 579                                 // replies with theirs if its happy, then if the initiator is happy,
 580                                 // it starts to send its net sync, which starts the merge, otherwise
 581                                 // it sends an ERROR.
 582                                 if (command == "SERVER")
 583                                 {
 584                                         return this->Inbound_Server(params);
 585                                 }
 586                                 else if (command == "ERROR")
 587                                 {
 588                                         return this->Error(params);
 589                                 }
 590                         break;
 591                         case WAIT_AUTH_2:
 592                                 // Waiting for start of other side's netmerge to say they liked our
 593                                 // password.
 594                                 if (command == "SERVER")
 595                                 {
 596                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
 597                                         // silently ignore.
 598                                         return true;
 599                                 }
 600                                 else if (command == "BURST")
 601                                 {
 602                                         this->LinkState = CONNECTED;
 603                                         Node = new TreeServer(InboundServerName,InboundDescription,TreeRoot,this);
 604                                         TreeRoot->AddChild(Node);
 605                                         this->DoBurst(Node);
 606                                 }
 607                                 else if (command == "ERROR")
 608                                 {
 609                                         return this->Error(params);
 610                                 }
 611
 612                         break;
 613                         case LISTENER:
 614                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
 615                                 return false;
 616                         break;
 617                         case CONNECTING:
 618                                 if (command == "SERVER")
 619                                 {
 620                                         // another server we connected to, which was in WAIT_AUTH_1 state,
 621                                         // has just sent us their credentials. If we get this far, theyre
 622                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
 623                                         // if we're happy with this, we should send our netburst which
 624                                         // kickstarts the merge.
 625                                         return this->Outbound_Reply_Server(params);
 626                                 }
 627                         break;
 628                         case CONNECTED:
 629                                 // This is the 'authenticated' state, when all passwords
 630                                 // have been exchanged and anything past this point is taken
 631                                 // as gospel.
 632                                 std::string target = "";
 633                                 if ((command == "NICK") && (params.size() > 1))
 634                                 {
 635                                         return this->IntroduceClient(prefix,params);
 636                                 }
 637                                 else
 638                                 {
 639                                         // not a special inter-server command.
 640                                         // Emulate the actual user doing the command,
 641                                         // this saves us having a huge ugly parser.
 642                                         userrec* who = Srv->FindNick(prefix);
 643                                         std::string sourceserv = this->myhost;
 644                                         if (this->InboundServerName != "")
 645                                         {
 646                                                 sourceserv = this->InboundServerName;
 647                                         }
 648                                         if (who)
 649                                         {
 650                                                 // its a user
 651                                                 target = who->server;
 652                                                 char* strparams[127];
 653                                                 for (unsigned int q = 0; q < params.size(); q++)
 654                                                 {
 655                                                         strparams[q] = (char*)params[q].c_str();
 656                                                 }
 657                                                 log(DEBUG,"*** CALL COMMAND HANDLER FOR %s, SOURCE: '%s'",command.c_str(),who->nick);
 658                                                 Srv->CallCommandHandler(command, strparams, params.size(), who);
 659                                         }
 660                                         else
 661                                         {
 662                                                 // its not a user. Its either a server, or somethings screwed up.
 663                                                 if (IsServer(prefix))
 664                                                 {
 665                                                         target = Srv->GetServerName();
 666                                                 }
 667                                                 else
 668                                                 {
 669                                                         log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
 670                                                         return true;
 671                                                 }
 672                                         }
 673                                         return DoOneToAllButSender(prefix,command,params,sourceserv);
 674
 675                                 }
 676                                 return true;
 677                         break;
 678                 }
 679                 return true;
 680         }
 681
 682         virtual void OnTimeout()
 683         {
 684                 if (this->LinkState = CONNECTING)
 685                 {
 686                         Srv->SendOpers("*** CONNECT: Connection to "+myhost+" timed out.");
 687                 }
 688         }
 689
 690         virtual void OnClose()
 691         {
 692         }
 693
 694         virtual int OnIncomingConnection(int newsock, char* ip)
 695         {
 696                 TreeSocket* s = new TreeSocket(newsock, ip);
 697                 Srv->AddSocket(s);
 698                 return true;
 699         }
 700 };
 701
 702 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> params, std::string omit)
 703 {
 704         // TODO: Special stuff with privmsg and notice
 705         std::string FullLine = ":" + prefix + " " + command;
 706         for (unsigned int x = 0; x < params.size(); x++)
 707         {
 708                 FullLine = FullLine + " " + params[x];
 709         }
 710         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
 711         {
 712                 TreeServer* Route = TreeRoot->GetChild(x);
 713                 if ((Route->GetSocket()) && (Route->GetName() != omit))
 714                 {
 715                         TreeSocket* Sock = Route->GetSocket();
 716                         Sock->WriteLine(FullLine);
 717                 }
 718         }
 719         return true;
 720 }
 721
 722 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> params)
 723 {
 724         std::string FullLine = ":" + prefix + " " + command;
 725         for (unsigned int x = 0; x < params.size(); x++)
 726         {
 727                 FullLine = FullLine + " " + params[x];
 728         }
 729         for (unsigned int x = 0; x < TreeRoot->ChildCount(); x++)
 730         {
 731                 TreeServer* Route = TreeRoot->GetChild(x);
 732                 if (Route->GetSocket())
 733                 {
 734                         TreeSocket* Sock = Route->GetSocket();
 735                         Sock->WriteLine(FullLine);
 736                 }
 737         }
 738         return true;
 739 }
 740
 741 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> params, std::string target)
 742 {
 743         TreeServer* Route = BestRouteTo(target);
 744         if (Route)
 745         {
 746                 std::string FullLine = ":" + prefix + " " + command;
 747                 for (unsigned int x = 0; x < params.size(); x++)
 748                 {
 749                         FullLine = FullLine + " " + params[x];
 750                 }
 751                 if (Route->GetSocket())
 752                 {
 753                         TreeSocket* Sock = Route->GetSocket();
 754                         Sock->WriteLine(FullLine);
 755                 }
 756                 return true;
 757         }
 758         else
 759         {
 760                 log(DEBUG,"Could not route message with target %s: %s",target.c_str(),command.c_str());
 761                 return true;
 762         }
 763 }
 764
 765
 766 class ModuleSpanningTree : public Module
 767 {
 768         std::vector<TreeSocket*> Bindings;
 769
 770  public:
 771
 772         void ReadConfiguration(bool rebind)
 773         {
 774                 if (rebind)
 775                 {
 776                         for (int j =0; j < Conf->Enumerate("bind"); j++)
 777                         {
 778                                 std::string Type = Conf->ReadValue("bind","type",j);
 779                                 std::string IP = Conf->ReadValue("bind","address",j);
 780                                 long Port = Conf->ReadInteger("bind","port",j,true);
 781                                 if (Type == "servers")
 782                                 {
 783                                         if (IP == "*")
 784                                         {
 785                                                 IP = "";
 786                                         }
 787                                         TreeSocket* listener = new TreeSocket(IP.c_str(),Port,true,10);
 788                                         if (listener->GetState() == I_LISTENING)
 789                                         {
 790                                                 Srv->AddSocket(listener);
 791                                                 Bindings.push_back(listener);
 792                                         }
 793                                         else
 794                                         {
 795                                                 log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
 796                                                 listener->Close();
 797                                                 delete listener;
 798                                         }
 799                                 }
 800                         }
 801                 }
 802                 LinkBlocks.clear();
 803                 for (int j =0; j < Conf->Enumerate("link"); j++)
 804                 {
 805                         Link L;
 806                         L.Name = Conf->ReadValue("link","name",j);
 807                         L.IPAddr = Conf->ReadValue("link","ipaddr",j);
 808                         L.Port = Conf->ReadInteger("link","port",j,true);
 809                         L.SendPass = Conf->ReadValue("link","sendpass",j);
 810                         L.RecvPass = Conf->ReadValue("link","recvpass",j);
 811                         LinkBlocks.push_back(L);
 812                         log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
 813                 }
 814         }
 815
 816         ModuleSpanningTree()
 817         {
 818                 Srv = new Server;
 819                 Conf = new ConfigReader;
 820                 Bindings.clear();
 821
 822                 // Create the root of the tree
 823                 TreeRoot = new TreeServer(Srv->GetServerName(),Srv->GetServerDescription());
 824
 825                 ReadConfiguration(true);
 826         }
 827
 828         void HandleLinks(char** parameters, int pcnt, userrec* user)
 829         {
 830                 return;
 831         }
 832
 833         void HandleLusers(char** parameters, int pcnt, userrec* user)
 834         {
 835                 return;
 836         }
 837
 838         void HandleMap(char** parameters, int pcnt, userrec* user)
 839         {
 840                 return;
 841         }
 842
 843         int HandleSquit(char** parameters, int pcnt, userrec* user)
 844         {
 845                 return 1;
 846         }
 847
 848         int HandleConnect(char** parameters, int pcnt, userrec* user)
 849         {
 850                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 851                 {
 852                         if (Srv->MatchText(x->Name.c_str(),parameters[0]))
 853                         {
 854                                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: Connecting to server: %s (%s:%d)",user->nick,x->Name.c_str(),x->IPAddr.c_str(),x->Port);
 855                                 TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name);
 856                                 Srv->AddSocket(newsocket);
 857                                 return 1;
 858                         }
 859                 }
 860                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: No matching server could be found in the config file.",user->nick);
 861                 return 1;
 862         }
 863
 864         virtual int OnPreCommand(std::string command, char **parameters, int pcnt, userrec *user)
 865         {
 866                 if (command == "CONNECT")
 867                 {
 868                         return this->HandleConnect(parameters,pcnt,user);
 869                 }
 870                 else if (command == "SQUIT")
 871                 {
 872                         return this->HandleSquit(parameters,pcnt,user);
 873                 }
 874                 else if (command == "MAP")
 875                 {
 876                         this->HandleMap(parameters,pcnt,user);
 877                         return 1;
 878                 }
 879                 else if (command == "LUSERS")
 880                 {
 881                         this->HandleLusers(parameters,pcnt,user);
 882                         return 1;
 883                 }
 884                 else if (command == "LINKS")
 885                 {
 886                         this->HandleLinks(parameters,pcnt,user);
 887                         return 1;
 888                 }
 889                 return 0;
 890         }
 891
 892         virtual void OnUserMessage(userrec* user, void* dest, int target_type, std::string text)
 893         {
 894                 if (target_type == TYPE_USER)
 895                 {
 896                         // route private messages which are targetted at clients only to the server
 897                         // which needs to receive them
 898                         userrec* d = (userrec*)dest;
 899                         if ((std::string(d->server) != Srv->GetServerName()) && (std::string(user->server) == Srv->GetServerName()))
 900                         {
 901                                 std::deque<std::string> params;
 902                                 params.clear();
 903                                 params.push_back(d->nick);
 904                                 params.push_back(":"+text);
 905                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
 906                         }
 907                 }
 908         }
 909
 910         virtual void OnUserJoin(userrec* user, chanrec* channel)
 911         {
 912                 // Only do this for local users
 913                 if (std::string(user->server) == Srv->GetServerName())
 914                 {
 915                         log(DEBUG,"**** User on %s JOINS %s",user->server,channel->name);
 916                         std::deque<std::string> params;
 917                         params.clear();
 918                         params.push_back(channel->name);
 919                         if (*channel->key)
 920                         {
 921                                 log(DEBUG,"**** With key %s",channel->key);
 922                                 // if the channel has a key, force the join by emulating the key.
 923                                 params.push_back(channel->key);
 924                         }
 925                         DoOneToMany(user->nick,"JOIN",params);
 926                 }
 927         }
 928
 929         virtual ~ModuleSpanningTree()
 930         {
 931                 delete Srv;
 932         }
 933
 934         virtual Version GetVersion()
 935         {
 936                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
 937         }
 938 };
 939
 940
 941 class ModuleSpanningTreeFactory : public ModuleFactory
 942 {
 943  public:
 944         ModuleSpanningTreeFactory()
 945         {
 946         }
 947
 948         ~ModuleSpanningTreeFactory()
 949         {
 950         }
 951
 952         virtual Module * CreateModule()
 953         {
 954                 return new ModuleSpanningTree;
 955         }
 956
 957 };
 958
 959
 960 extern "C" void * init_module( void )
 961 {
 962         return new ModuleSpanningTreeFactory;
 963 }
 964