src/modules/m_spanningtree.cpp

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