src/modules/m_spanningtree/treesocket2.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "configreader.h"
  15 #include "users.h"
  16 #include "channels.h"
  17 #include "modules.h"
  18 #include "commands/cmd_whois.h"
  19 #include "commands/cmd_stats.h"
  20 #include "socket.h"
  21 #include "inspircd.h"
  22 #include "wildcard.h"
  23 #include "xline.h"
  24 #include "transport.h"
  25 #include "socketengine.h"
  26
  27 #include "m_spanningtree/main.h"
  28 #include "m_spanningtree/utils.h"
  29 #include "m_spanningtree/treeserver.h"
  30 #include "m_spanningtree/link.h"
  31 #include "m_spanningtree/treesocket.h"
  32 #include "m_spanningtree/resolvers.h"
  33 #include "m_spanningtree/handshaketimer.h"
  34
  35 /* $ModDep: m_spanningtree/timesynctimer.h m_spanningtree/resolvers.h m_spanningtree/main.h m_spanningtree/utils.h m_spanningtree/treeserver.h m_spanningtree/link.h m_spanningtree/treesocket.h */
  36
  37 int TreeSocket::WriteLine(std::string line)
  38 {
  39         Instance->Log(DEBUG, "-> %s", line.c_str());
  40         line.append("\r\n");
  41         return this->Write(line);
  42 }
  43
  44 /* Handle ERROR command */
  45 bool TreeSocket::Error(std::deque<std::string> &params)
  46 {
  47         if (params.size() < 1)
  48                 return false;
  49         this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
  50         /* we will return false to cause the socket to close. */
  51         return false;
  52 }
  53
  54 bool TreeSocket::Modules(const std::string &prefix, std::deque<std::string> &params)
  55 {
  56         if (params.empty())
  57                 return true;
  58
  59         if (!this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
  60         {
  61                 /* Pass it on, not for us */
  62                 Utils->DoOneToOne(prefix, "MODULES", params, params[0]);
  63                 return true;
  64         }
  65
  66         char strbuf[MAXBUF];
  67         std::deque<std::string> par;
  68         par.push_back(prefix);
  69         par.push_back("");
  70
  71         userrec* source = this->Instance->FindNick(prefix);
  72         if (!source)
  73                 return true;
  74
  75         for (unsigned int i = 0; i < Instance->Config->module_names.size(); i++)
  76         {
  77                 Version V = Instance->modules[i]->GetVersion();
  78                 char modulename[MAXBUF];
  79                 char flagstate[MAXBUF];
  80                 *flagstate = 0;
  81                 if (V.Flags & VF_STATIC)
  82                         strlcat(flagstate,", static",MAXBUF);
  83                 if (V.Flags & VF_VENDOR)
  84                         strlcat(flagstate,", vendor",MAXBUF);
  85                 if (V.Flags & VF_COMMON)
  86                         strlcat(flagstate,", common",MAXBUF);
  87                 if (V.Flags & VF_SERVICEPROVIDER)
  88                         strlcat(flagstate,", service provider",MAXBUF);
  89                 if (!flagstate[0])
  90                         strcpy(flagstate,"  <no flags>");
  91                 strlcpy(modulename,Instance->Config->module_names[i].c_str(),256);
  92                 if (*source->oper)
  93                 {
  94                         snprintf(strbuf, MAXBUF, "::%s 900 %s :0x%08lx %d.%d.%d.%d %s (%s)",Instance->Config->ServerName,source->nick,(long unsigned int)Instance->modules[i],V.Major,V.Minor,V.Revision,V.Build,ServerConfig::CleanFilename(modulename),flagstate+2);
  95                 }
  96                 else
  97                 {
  98                         snprintf(strbuf, MAXBUF, "::%s 900 %s :%s",Instance->Config->ServerName,source->nick,ServerConfig::CleanFilename(modulename));
  99                 }
 100                 par[1] = strbuf;
 101                 Utils->DoOneToOne(Instance->Config->ServerName, "PUSH", par, source->server);
 102         }
 103         snprintf(strbuf, MAXBUF, "::%s 901 %s :End of MODULES list", Instance->Config->ServerName, source->nick);
 104         par[1] = strbuf;
 105         Utils->DoOneToOne(Instance->Config->ServerName, "PUSH", par, source->server);
 106         return true;
 107 }
 108
 109 /** remote MOTD. leet, huh? */
 110 bool TreeSocket::Motd(const std::string &prefix, std::deque<std::string> &params)
 111 {
 112         if (params.size() > 0)
 113         {
 114                 if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
 115                 {
 116                         /* It's for our server */
 117                         string_list results;
 118                         userrec* source = this->Instance->FindNick(prefix);
 119
 120                         if (source)
 121                         {
 122                                 std::deque<std::string> par;
 123                                 par.push_back(prefix);
 124                                 par.push_back("");
 125
 126                                 if (!Instance->Config->MOTD.size())
 127                                 {
 128                                         par[1] = std::string("::")+Instance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
 129                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 130                                         return true;
 131                                 }
 132
 133                                 par[1] = std::string("::")+Instance->Config->ServerName+" 375 "+source->nick+" :"+Instance->Config->ServerName+" message of the day";
 134                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 135
 136                                 for (unsigned int i = 0; i < Instance->Config->MOTD.size(); i++)
 137                                 {
 138                                         par[1] = std::string("::")+Instance->Config->ServerName+" 372 "+source->nick+" :- "+Instance->Config->MOTD[i];
 139                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 140                                 }
 141
 142                                 par[1] = std::string("::")+Instance->Config->ServerName+" 376 "+source->nick+" End of message of the day.";
 143                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 144                         }
 145                 }
 146                 else
 147                 {
 148                         /* Pass it on */
 149                         userrec* source = this->Instance->FindNick(prefix);
 150                         if (source)
 151                                 Utils->DoOneToOne(prefix, "MOTD", params, params[0]);
 152                 }
 153         }
 154         return true;
 155 }
 156
 157 /** remote ADMIN. leet, huh? */
 158 bool TreeSocket::Admin(const std::string &prefix, std::deque<std::string> &params)
 159 {
 160         if (params.size() > 0)
 161         {
 162                 if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
 163                 {
 164                         /* It's for our server */
 165                         string_list results;
 166                         userrec* source = this->Instance->FindNick(prefix);
 167                         if (source)
 168                         {
 169                                 std::deque<std::string> par;
 170                                 par.push_back(prefix);
 171                                 par.push_back("");
 172                                 par[1] = std::string("::")+Instance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+Instance->Config->ServerName;
 173                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 174                                 par[1] = std::string("::")+Instance->Config->ServerName+" 257 "+source->nick+" :Name     - "+Instance->Config->AdminName;
 175                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 176                                 par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+Instance->Config->AdminNick;
 177                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 178                                 par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+Instance->Config->AdminEmail;
 179                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 180                         }
 181                 }
 182                 else
 183                 {
 184                         /* Pass it on */
 185                         userrec* source = this->Instance->FindNick(prefix);
 186                         if (source)
 187                                 Utils->DoOneToOne(prefix, "ADMIN", params, params[0]);
 188                 }
 189         }
 190         return true;
 191 }
 192
 193 bool TreeSocket::Stats(const std::string &prefix, std::deque<std::string> &params)
 194 {
 195         /* Get the reply to a STATS query if it matches this servername,
 196          * and send it back as a load of PUSH queries
 197          */
 198         if (params.size() > 1)
 199         {
 200                 if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
 201                 {
 202                         /* It's for our server */
 203                         string_list results;
 204                         userrec* source = this->Instance->FindNick(prefix);
 205                         if (source)
 206                         {
 207                                 std::deque<std::string> par;
 208                                 par.push_back(prefix);
 209                                 par.push_back("");
 210                                 DoStats(this->Instance, *(params[0].c_str()), source, results);
 211                                 for (size_t i = 0; i < results.size(); i++)
 212                                 {
 213                                         par[1] = "::" + results[i];
 214                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 215                                 }
 216                         }
 217                 }
 218                 else
 219                 {
 220                         /* Pass it on */
 221                         userrec* source = this->Instance->FindNick(prefix);
 222                         if (source)
 223                                 Utils->DoOneToOne(prefix, "STATS", params, params[1]);
 224                 }
 225         }
 226         return true;
 227 }
 228
 229
 230 /** Because the core won't let users or even SERVERS set +o,
 231  * we use the OPERTYPE command to do this.
 232  */
 233 bool TreeSocket::OperType(const std::string &prefix, std::deque<std::string> &params)
 234 {
 235         if (params.size() != 1)
 236                 return true;
 237         std::string opertype = params[0];
 238         userrec* u = this->Instance->FindNick(prefix);
 239         if (u)
 240         {
 241                 u->modes[UM_OPERATOR] = 1;
 242                 this->Instance->all_opers.push_back(u);
 243                 strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
 244                 Utils->DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
 245                 this->Instance->SNO->WriteToSnoMask('o',"From %s: User %s (%s@%s) is now an IRC operator of type %s",u->server, u->nick,u->ident,u->host,irc::Spacify(opertype.c_str()));
 246         }
 247         return true;
 248 }
 249
 250 /** Because Andy insists that services-compatible servers must
 251  * implement SVSNICK and SVSJOIN, that's exactly what we do :p
 252  */
 253 bool TreeSocket::ForceNick(const std::string &prefix, std::deque<std::string> &params)
 254 {
 255         if (params.size() < 3)
 256                 return true;
 257
 258         userrec* u = this->Instance->FindNick(params[0]);
 259
 260         if (u)
 261         {
 262                 Utils->DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
 263                 if (IS_LOCAL(u))
 264                 {
 265                         std::deque<std::string> par;
 266                         par.push_back(params[1]);
 267                         if (!u->ForceNickChange(params[1].c_str()))
 268                         {
 269                                 userrec::QuitUser(this->Instance, u, "Nickname collision");
 270                                 return true;
 271                         }
 272                         u->age = atoi(params[2].c_str());
 273                 }
 274         }
 275         return true;
 276 }
 277
 278 bool TreeSocket::OperQuit(const std::string &prefix, std::deque<std::string> &params)
 279 {
 280         if (params.size() < 1)
 281                 return true;
 282
 283         userrec* u = this->Instance->FindNick(prefix);
 284
 285         if (u)
 286         {
 287                 Utils->DoOneToAllButSender(prefix,"OPERQUIT",params,prefix);
 288                 u->SetOperQuit(params[0]);
 289         }
 290         return true;
 291 }
 292
 293 /*
 294  * Remote SQUIT (RSQUIT). Routing works similar to SVSNICK: Route it to the server that the target is connected to locally,
 295  * then let that server do the dirty work (squit it!). Example:
 296  * A -> B -> C -> D: oper on A squits D, A routes to B, B routes to C, C notices D connected locally, kills it. -- w00t
 297  */
 298 bool TreeSocket::RemoteSquit(const std::string &prefix, std::deque<std::string> &params)
 299 {
 300         /* ok.. :w00t RSQUIT jupe.barafranca.com :reason here */
 301         if (params.size() < 2)
 302                 return true;
 303
 304         TreeServer* s = Utils->FindServerMask(params[0]);
 305
 306         if (s)
 307         {
 308                 if (s == Utils->TreeRoot)
 309                 {
 310                         this->Instance->SNO->WriteToSnoMask('l',"What the fuck, I recieved a remote SQUIT for myself? :< (from %s", prefix.c_str());
 311                         return true;
 312                 }
 313
 314                 TreeSocket* sock = s->GetSocket();
 315
 316                 if (sock)
 317                 {
 318                         /* it's locally connected, KILL IT! */
 319                         Instance->SNO->WriteToSnoMask('l',"RSQUIT: Server \002%s\002 removed from network by %s: %s", params[0].c_str(), prefix.c_str(), params[1].c_str());
 320                         sock->Squit(s,"Server quit by " + prefix + ": " + params[1]);
 321                         Instance->SE->DelFd(sock);
 322                         sock->Close();
 323                         delete sock;
 324                 }
 325                 else
 326                 {
 327                         /* route the rsquit */
 328                         params[1] = ":" + params[1];
 329                         Utils->DoOneToOne(prefix, "RSQUIT", params, params[0]);
 330                 }
 331         }
 332         else
 333         {
 334                 /* mother fucker! it doesn't exist */
 335         }
 336
 337         return true;
 338 }
 339
 340 bool TreeSocket::ServiceJoin(const std::string &prefix, std::deque<std::string> &params)
 341 {
 342         if (params.size() < 2)
 343                 return true;
 344
 345         userrec* u = this->Instance->FindNick(params[0]);
 346
 347         if (u)
 348         {
 349                 /* only join if it's local, otherwise just pass it on! */
 350                 if (IS_LOCAL(u))
 351                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false, "", Instance->Time());
 352                 Utils->DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
 353         }
 354         return true;
 355 }
 356
 357 bool TreeSocket::RemoteRehash(const std::string &prefix, std::deque<std::string> &params)
 358 {
 359         if (params.size() < 1)
 360                 return false;
 361
 362         std::string servermask = params[0];
 363
 364         if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
 365         {
 366                 this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated by \002"+prefix+"\002.");
 367                 this->Instance->RehashServer();
 368                 Utils->ReadConfiguration(false);
 369                 InitializeDisabledCommands(Instance->Config->DisabledCommands, Instance);
 370         }
 371         Utils->DoOneToAllButSender(prefix,"REHASH",params,prefix);
 372         return true;
 373 }
 374
 375 bool TreeSocket::RemoteKill(const std::string &prefix, std::deque<std::string> &params)
 376 {
 377         if (params.size() != 2)
 378                 return true;
 379
 380         std::string nick = params[0];
 381         userrec* u = this->Instance->FindNick(prefix);
 382         userrec* who = this->Instance->FindNick(nick);
 383
 384         if (who)
 385         {
 386                 /* Prepend kill source, if we don't have one */
 387                 std::string sourceserv = prefix;
 388                 if (u)
 389                 {
 390                         sourceserv = u->server;
 391                 }
 392                 if (*(params[1].c_str()) != '[')
 393                 {
 394                         params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
 395                 }
 396                 std::string reason = params[1];
 397                 params[1] = ":" + params[1];
 398                 Utils->DoOneToAllButSender(prefix,"KILL",params,sourceserv);
 399                 who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
 400                 userrec::QuitUser(this->Instance,who,reason);
 401         }
 402         return true;
 403 }
 404
 405 bool TreeSocket::LocalPong(const std::string &prefix, std::deque<std::string> &params)
 406 {
 407         if (params.size() < 1)
 408                 return true;
 409
 410         if (params.size() == 1)
 411         {
 412                 TreeServer* ServerSource = Utils->FindServer(prefix);
 413                 if (ServerSource)
 414                 {
 415                         ServerSource->SetPingFlag();
 416                         ServerSource->rtt = Instance->Time() - ServerSource->LastPing;
 417                 }
 418         }
 419         else
 420         {
 421                 std::string forwardto = params[1];
 422                 if (forwardto == this->Instance->Config->ServerName)
 423                 {
 424                         /*
 425                          * this is a PONG for us
 426                          * if the prefix is a user, check theyre local, and if they are,
 427                          * dump the PONG reply back to their fd. If its a server, do nowt.
 428                          * Services might want to send these s->s, but we dont need to yet.
 429                          */
 430                         userrec* u = this->Instance->FindNick(prefix);
 431                         if (u)
 432                         {
 433                                 u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
 434                         }
 435                 }
 436                 else
 437                 {
 438                         // not for us, pass it on :)
 439                         Utils->DoOneToOne(prefix,"PONG",params,forwardto);
 440                 }
 441         }
 442
 443         return true;
 444 }
 445
 446 bool TreeSocket::MetaData(const std::string &prefix, std::deque<std::string> &params)
 447 {
 448         if (params.size() < 2)
 449                 return true;
 450         else
 451                 params.push_back("");
 452         TreeServer* ServerSource = Utils->FindServer(prefix);
 453         if (ServerSource)
 454         {
 455                 if (params[0] == "*")
 456                 {
 457                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
 458                 }
 459                 else if (*(params[0].c_str()) == '#')
 460                 {
 461                         chanrec* c = this->Instance->FindChan(params[0]);
 462                         if (c)
 463                         {
 464                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
 465                         }
 466                 }
 467                 else if (*(params[0].c_str()) != '#')
 468                 {
 469                         userrec* u = this->Instance->FindNick(params[0]);
 470                         if (u)
 471                         {
 472                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
 473                         }
 474                 }
 475         }
 476
 477         params[2] = ":" + params[2];
 478         Utils->DoOneToAllButSender(prefix,"METADATA",params,prefix);
 479         return true;
 480 }
 481
 482 bool TreeSocket::ServerVersion(const std::string &prefix, std::deque<std::string> &params)
 483 {
 484         if (params.size() < 1)
 485                 return true;
 486
 487         TreeServer* ServerSource = Utils->FindServer(prefix);
 488
 489         if (ServerSource)
 490         {
 491                 ServerSource->SetVersion(params[0]);
 492         }
 493         params[0] = ":" + params[0];
 494         Utils->DoOneToAllButSender(prefix,"VERSION",params,prefix);
 495         return true;
 496 }
 497
 498 bool TreeSocket::ChangeHost(const std::string &prefix, std::deque<std::string> &params)
 499 {
 500         if (params.size() < 1)
 501                 return true;
 502         userrec* u = this->Instance->FindNick(prefix);
 503
 504         if (u)
 505         {
 506                 u->ChangeDisplayedHost(params[0].c_str());
 507                 Utils->DoOneToAllButSender(prefix,"FHOST",params,u->server);
 508         }
 509         return true;
 510 }
 511
 512 bool TreeSocket::AddLine(const std::string &prefix, std::deque<std::string> &params)
 513 {
 514         if (params.size() < 6)
 515                 return true;
 516         bool propogate = false;
 517         if (!this->bursting)
 518                 Utils->lines_to_apply = 0;
 519         switch (*(params[0].c_str()))
 520         {
 521                 case 'Z':
 522                         propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 523                         Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 524                         if (propogate)
 525                                 Utils->lines_to_apply |= APPLY_ZLINES;
 526                 break;
 527                 case 'Q':
 528                         propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 529                         Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 530                         if (propogate)
 531                                 Utils->lines_to_apply |= APPLY_QLINES;
 532                 break;
 533                 case 'E':
 534                         propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 535                         Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 536                 break;
 537                 case 'G':
 538                         propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 539                         Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 540                         if (propogate)
 541                                 Utils->lines_to_apply |= APPLY_GLINES;
 542                 break;
 543                 case 'K':
 544                         propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 545                         if (propogate)
 546                                 Utils->lines_to_apply |= APPLY_KLINES;
 547                 break;
 548                 default:
 549                         /* Just in case... */
 550                         this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
 551                         propogate = false;
 552                 break;
 553         }
 554         /* Send it on its way */
 555         if (propogate)
 556         {
 557                 if (atoi(params[4].c_str()))
 558                 {
 559                         time_t c_requires_crap = ConvToInt(params[4]) + Instance->Time();
 560                         this->Instance->SNO->WriteToSnoMask('x',"%s Added %cLINE on %s to expire on %s (%s).",prefix.c_str(),*(params[0].c_str()),params[1].c_str(),Instance->TimeString(c_requires_crap).c_str(),params[5].c_str());
 561                 }
 562                 else
 563                 {
 564                         this->Instance->SNO->WriteToSnoMask('x',"%s Added permenant %cLINE on %s (%s).",prefix.c_str(),*(params[0].c_str()),params[1].c_str(),params[5].c_str());
 565                 }
 566                 params[5] = ":" + params[5];
 567                 Utils->DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
 568         }
 569         if (!this->bursting)
 570         {
 571                 Instance->XLines->apply_lines(Utils->lines_to_apply);
 572                 Utils->lines_to_apply = 0;
 573         }
 574         return true;
 575 }
 576
 577 bool TreeSocket::ChangeName(const std::string &prefix, std::deque<std::string> &params)
 578 {
 579         if (params.size() < 1)
 580                 return true;
 581         userrec* u = this->Instance->FindNick(prefix);
 582         if (u)
 583         {
 584                 u->ChangeName(params[0].c_str());
 585                 params[0] = ":" + params[0];
 586                 Utils->DoOneToAllButSender(prefix,"FNAME",params,u->server);
 587         }
 588         return true;
 589 }
 590
 591 bool TreeSocket::Whois(const std::string &prefix, std::deque<std::string> &params)
 592 {
 593         if (params.size() < 1)
 594                 return true;
 595         userrec* u = this->Instance->FindNick(prefix);
 596         if (u)
 597         {
 598                 // an incoming request
 599                 if (params.size() == 1)
 600                 {
 601                         userrec* x = this->Instance->FindNick(params[0]);
 602                         if ((x) && (IS_LOCAL(x)))
 603                         {
 604                                 userrec* x = this->Instance->FindNick(params[0]);
 605                                 char signon[MAXBUF];
 606                                 char idle[MAXBUF];
 607                                 snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
 608                                 snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-Instance->Time(true)));
 609                                 std::deque<std::string> par;
 610                                 par.push_back(prefix);
 611                                 par.push_back(signon);
 612                                 par.push_back(idle);
 613                                 // ours, we're done, pass it BACK
 614                                 Utils->DoOneToOne(params[0],"IDLE",par,u->server);
 615                         }
 616                         else
 617                         {
 618                                 // not ours pass it on
 619                                 Utils->DoOneToOne(prefix,"IDLE",params,x->server);
 620                         }
 621                 }
 622                 else if (params.size() == 3)
 623                 {
 624                         std::string who_did_the_whois = params[0];
 625                         userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
 626                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
 627                         {
 628                                 // an incoming reply to a whois we sent out
 629                                 std::string nick_whoised = prefix;
 630                                 unsigned long signon = atoi(params[1].c_str());
 631                                 unsigned long idle = atoi(params[2].c_str());
 632                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
 633                                         do_whois(this->Instance,who_to_send_to,u,signon,idle,nick_whoised.c_str());
 634                         }
 635                         else
 636                         {
 637                                 // not ours, pass it on
 638                                 Utils->DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
 639                         }
 640                 }
 641         }
 642         return true;
 643 }
 644
 645 bool TreeSocket::Push(const std::string &prefix, std::deque<std::string> &params)
 646 {
 647         if (params.size() < 2)
 648                 return true;
 649         userrec* u = this->Instance->FindNick(params[0]);
 650         if (!u)
 651                 return true;
 652         if (IS_LOCAL(u))
 653         {
 654                 u->Write(params[1]);
 655         }
 656         else
 657         {
 658                 // continue the raw onwards
 659                 params[1] = ":" + params[1];
 660                 Utils->DoOneToOne(prefix,"PUSH",params,u->server);
 661         }
 662         return true;
 663 }
 664
 665 bool TreeSocket::HandleSetTime(const std::string &prefix, std::deque<std::string> &params)
 666 {
 667         if (!params.size() || !Utils->EnableTimeSync)
 668                 return true;
 669
 670         bool force = false;
 671
 672         if ((params.size() == 2) && (params[1] == "FORCE"))
 673                 force = true;
 674
 675         time_t them = atoi(params[0].c_str());
 676         time_t us = Instance->Time(false);
 677
 678         time_t diff = them - us;
 679
 680         Utils->DoOneToAllButSender(prefix, "TIMESET", params, prefix);
 681
 682         if (force || (them != us))
 683         {
 684                 time_t old = Instance->SetTimeDelta(diff);
 685                 Instance->Log(DEBUG, "TS (diff %d) from %s applied (old delta was %d)", diff, prefix.c_str(), old);
 686         }
 687
 688         return true;
 689 }
 690
 691 bool TreeSocket::Time(const std::string &prefix, std::deque<std::string> &params)
 692 {
 693         // :source.server TIME remote.server sendernick
 694         // :remote.server TIME source.server sendernick TS
 695         if (params.size() == 2)
 696         {
 697                 // someone querying our time?
 698                 if (this->Instance->Config->ServerName == params[0])
 699                 {
 700                         userrec* u = this->Instance->FindNick(params[1]);
 701                         if (u)
 702                         {
 703                                 params.push_back(ConvToStr(Instance->Time(false)));
 704                                 params[0] = prefix;
 705                                 Utils->DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
 706                         }
 707                 }
 708                 else
 709                 {
 710                         // not us, pass it on
 711                         userrec* u = this->Instance->FindNick(params[1]);
 712                         if (u)
 713                                 Utils->DoOneToOne(prefix,"TIME",params,params[0]);
 714                 }
 715         }
 716         else if (params.size() == 3)
 717         {
 718                 // a response to a previous TIME
 719                 userrec* u = this->Instance->FindNick(params[1]);
 720                 if ((u) && (IS_LOCAL(u)))
 721                 {
 722                         time_t rawtime = atol(params[2].c_str());
 723                         struct tm * timeinfo;
 724                         timeinfo = localtime(&rawtime);
 725                         char tms[26];
 726                         snprintf(tms,26,"%s",asctime(timeinfo));
 727                         tms[24] = 0;
 728                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
 729                 }
 730                 else
 731                 {
 732                         if (u)
 733                                 Utils->DoOneToOne(prefix,"TIME",params,u->server);
 734                 }
 735         }
 736         return true;
 737 }
 738
 739 bool TreeSocket::LocalPing(const std::string &prefix, std::deque<std::string> &params)
 740 {
 741         if (params.size() < 1)
 742                 return true;
 743         if (params.size() == 1)
 744         {
 745                 std::string stufftobounce = params[0];
 746                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
 747                 return true;
 748         }
 749         else
 750         {
 751                 std::string forwardto = params[1];
 752                 if (forwardto == this->Instance->Config->ServerName)
 753                 {
 754                         // this is a ping for us, send back PONG to the requesting server
 755                         params[1] = params[0];
 756                         params[0] = forwardto;
 757                         Utils->DoOneToOne(forwardto,"PONG",params,params[1]);
 758                 }
 759                 else
 760                 {
 761                         // not for us, pass it on :)
 762                         Utils->DoOneToOne(prefix,"PING",params,forwardto);
 763                 }
 764                 return true;
 765         }
 766 }
 767
 768 /** TODO: This creates a total mess of output and needs to really use irc::modestacker.
 769  */
 770 bool TreeSocket::RemoveStatus(const std::string &prefix, std::deque<std::string> &params)
 771 {
 772         if (params.size() < 1)
 773                 return true;
 774         chanrec* c = Instance->FindChan(params[0]);
 775         if (c)
 776         {
 777                 for (char modeletter = 'A'; modeletter <= 'z'; modeletter++)
 778                 {
 779                         ModeHandler* mh = Instance->Modes->FindMode(modeletter, MODETYPE_CHANNEL);
 780                         if (mh)
 781                                 mh->RemoveMode(c);
 782                 }
 783         }
 784         return true;
 785 }
 786
 787 bool TreeSocket::RemoteServer(const std::string &prefix, std::deque<std::string> &params)
 788 {
 789         if (params.size() < 4)
 790                 return false;
 791         std::string servername = params[0];
 792         std::string password = params[1];
 793         // hopcount is not used for a remote server, we calculate this ourselves
 794         std::string description = params[3];
 795         TreeServer* ParentOfThis = Utils->FindServer(prefix);
 796         if (!ParentOfThis)
 797         {
 798                 this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
 799                 return false;
 800         }
 801         TreeServer* CheckDupe = Utils->FindServer(servername);
 802         if (CheckDupe)
 803         {
 804                 this->WriteLine("ERROR :Server "+servername+" already exists!");
 805                 this->Instance->SNO->WriteToSnoMask('l',"Server \2"+servername+"\2 being introduced from \2" + prefix + "\2 denied, already exists. Closing link with " + prefix);
 806                 return false;
 807         }
 808         Link* lnk = Utils->FindLink(servername);
 809         TreeServer* Node = new TreeServer(this->Utils,this->Instance,servername,description,ParentOfThis,NULL, lnk ? lnk->Hidden : false);
 810         ParentOfThis->AddChild(Node);
 811         params[3] = ":" + params[3];
 812         Utils->DoOneToAllButSender(prefix,"SERVER",params,prefix);
 813         this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
 814         return true;
 815 }
 816
 817 bool TreeSocket::ComparePass(const std::string &ours, const std::string &theirs)
 818 {
 819         if ((!strncmp(ours.c_str(), "HMAC-SHA256:", 12)) || (!strncmp(theirs.c_str(), "HMAC-SHA256:", 12)))
 820         {
 821                 /* One or both of us specified hmac sha256, but we don't have sha256 module loaded!
 822                  * We can't allow this password as valid.
 823                  */
 824                 if (!Instance->FindModule("m_sha256.so") || !Utils->ChallengeResponse)
 825                                 return false;
 826                 else
 827                         /* Straight string compare of hashes */
 828                         return ours == theirs;
 829         }
 830         else
 831                 /* Straight string compare of plaintext */
 832                 return ours == theirs;
 833 }
 834
 835 bool TreeSocket::Outbound_Reply_Server(std::deque<std::string> &params)
 836 {
 837         if (params.size() < 4)
 838                 return false;
 839
 840         irc::string servername = params[0].c_str();
 841         std::string sname = params[0];
 842         std::string password = params[1];
 843         int hops = atoi(params[2].c_str());
 844
 845         if (hops)
 846         {
 847                 this->WriteLine("ERROR :Server too far away for authentication");
 848                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
 849                 return false;
 850         }
 851         std::string description = params[3];
 852         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 853         {
 854                 if ((x->Name == servername) && (ComparePass(this->MakePass(x->RecvPass,this->GetOurChallenge()),password)))
 855                 {
 856                         TreeServer* CheckDupe = Utils->FindServer(sname);
 857                         if (CheckDupe)
 858                         {
 859                                 this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
 860                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
 861                                 return false;
 862                         }
 863                         // Begin the sync here. this kickstarts the
 864                         // other side, waiting in WAIT_AUTH_2 state,
 865                         // into starting their burst, as it shows
 866                         // that we're happy.
 867                         this->LinkState = CONNECTED;
 868                         // we should add the details of this server now
 869                         // to the servers tree, as a child of the root
 870                         // node.
 871                         TreeServer* Node = new TreeServer(this->Utils,this->Instance,sname,description,Utils->TreeRoot,this,x->Hidden);
 872                         Utils->TreeRoot->AddChild(Node);
 873                         params[3] = ":" + params[3];
 874                         Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,sname);
 875                         this->bursting = true;
 876                         this->DoBurst(Node);
 877                         return true;
 878                 }
 879         }
 880         this->WriteLine("ERROR :Invalid credentials");
 881         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
 882         return false;
 883 }
 884
 885 bool TreeSocket::Inbound_Server(std::deque<std::string> &params)
 886 {
 887         if (params.size() < 4)
 888                 return false;
 889         irc::string servername = params[0].c_str();
 890         std::string sname = params[0];
 891         std::string password = params[1];
 892         int hops = atoi(params[2].c_str());
 893
 894         if (hops)
 895         {
 896                 this->WriteLine("ERROR :Server too far away for authentication");
 897                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
 898                 return false;
 899         }
 900         std::string description = params[3];
 901         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 902         {
 903                 if ((x->Name == servername) && (ComparePass(this->MakePass(x->RecvPass,this->GetOurChallenge()),password)))
 904                 {
 905                         TreeServer* CheckDupe = Utils->FindServer(sname);
 906                         if (CheckDupe)
 907                         {
 908                                 this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
 909                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
 910                                 return false;
 911                         }
 912                         this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
 913                         if (this->Hook)
 914                         {
 915                                 std::string name = InspSocketNameRequest((Module*)Utils->Creator, this->Hook).Send();
 916                                 this->Instance->SNO->WriteToSnoMask('l',"Connection from \2"+sname+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] using transport \2"+name+"\2");
 917                         }
 918
 919                         this->InboundServerName = sname;
 920                         this->InboundDescription = description;
 921                         // this is good. Send our details: Our server name and description and hopcount of 0,
 922                         // along with the sendpass from this block.
 923                         this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+this->MakePass(x->SendPass, this->GetTheirChallenge())+" 0 :"+this->Instance->Config->ServerDesc);
 924                         // move to the next state, we are now waiting for THEM.
 925                         this->LinkState = WAIT_AUTH_2;
 926                         return true;
 927                 }
 928         }
 929         this->WriteLine("ERROR :Invalid credentials");
 930         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
 931         return false;
 932 }
 933
 934 void TreeSocket::Split(const std::string &line, std::deque<std::string> &n)
 935 {
 936         n.clear();
 937         irc::tokenstream tokens(line);
 938         std::string param;
 939         while (tokens.GetToken(param))
 940                 n.push_back(param);
 941         return;
 942 }
 943
 944 bool TreeSocket::ProcessLine(std::string &line)
 945 {
 946         std::deque<std::string> params;
 947         irc::string command;
 948         std::string prefix;
 949
 950         line = line.substr(0, line.find_first_of("\r\n"));
 951
 952         if (line.empty())
 953                 return true;
 954
 955         Instance->Log(DEBUG, "<- %s", line.c_str());
 956
 957         this->Split(line.c_str(),params);
 958
 959         if ((params[0][0] == ':') && (params.size() > 1))
 960         {
 961                 prefix = params[0].substr(1);
 962                 params.pop_front();
 963         }
 964         command = params[0].c_str();
 965         params.pop_front();
 966         switch (this->LinkState)
 967         {
 968                 TreeServer* Node;
 969
 970                 case WAIT_AUTH_1:
 971                         // Waiting for SERVER command from remote server. Server initiating
 972                         // the connection sends the first SERVER command, listening server
 973                         // replies with theirs if its happy, then if the initiator is happy,
 974                         // it starts to send its net sync, which starts the merge, otherwise
 975                         // it sends an ERROR.
 976                         if (command == "PASS")
 977                         {
 978                                 /* Silently ignored */
 979                         }
 980                         else if (command == "SERVER")
 981                         {
 982                                 return this->Inbound_Server(params);
 983                         }
 984                         else if (command == "ERROR")
 985                         {
 986                                 return this->Error(params);
 987                         }
 988                         else if (command == "USER")
 989                         {
 990                                 this->WriteLine("ERROR :Client connections to this port are prohibited.");
 991                                 return false;
 992                         }
 993                         else if (command == "CAPAB")
 994                         {
 995                                 return this->Capab(params);
 996                         }
 997                         else if ((command == "U") || (command == "S"))
 998                         {
 999                                 this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
1000                                 return false;
1001                         }
1002                         else
1003                         {
1004                                 std::string error("ERROR :Invalid command in negotiation phase: ");
1005                                 error.append(command.c_str());
1006                                 this->WriteLine(error);
1007                                 return false;
1008                         }
1009                 break;
1010                 case WAIT_AUTH_2:
1011                         // Waiting for start of other side's netmerge to say they liked our
1012                         // password.
1013                         if (command == "SERVER")
1014                         {
1015                                 // cant do this, they sent it to us in the WAIT_AUTH_1 state!
1016                                 // silently ignore.
1017                                 return true;
1018                         }
1019                         else if ((command == "U") || (command == "S"))
1020                         {
1021                                 this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
1022                                 return false;
1023                         }
1024                         else if (command == "BURST")
1025                         {
1026                                 if (params.size() && Utils->EnableTimeSync)
1027                                 {
1028                                         bool we_have_delta = (Instance->Time(false) != Instance->Time(true));
1029                                         time_t them = atoi(params[0].c_str());
1030                                         time_t delta = them - Instance->Time(false);
1031                                         if ((delta < -300) || (delta > 300))
1032                                         {
1033                                                 Instance->SNO->WriteToSnoMask('l',"\2ERROR\2: Your clocks are out by %d seconds (this is more than five minutes). Link aborted, \2PLEASE SYNC YOUR CLOCKS!\2",abs(delta));
1034                                                 WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
1035                                                 return false;
1036                                         }
1037                                         else if ((delta < -30) || (delta > 30))
1038                                         {
1039                                                 Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds. Please consider synching your clocks.", abs(delta));
1040                                         }
1041
1042                                         if (!Utils->MasterTime && !we_have_delta)
1043                                         {
1044                                                 this->Instance->SetTimeDelta(delta);
1045                                                 // Send this new timestamp to any other servers
1046                                                 Utils->DoOneToMany(Utils->TreeRoot->GetName(), "TIMESET", params);
1047                                         }
1048                                 }
1049                                 this->LinkState = CONNECTED;
1050                                 Link* lnk = Utils->FindLink(InboundServerName);
1051                                 Node = new TreeServer(this->Utils,this->Instance, InboundServerName, InboundDescription, Utils->TreeRoot, this, lnk ? lnk->Hidden : false);
1052                                 Utils->TreeRoot->AddChild(Node);
1053                                 params.clear();
1054                                 params.push_back(InboundServerName);
1055                                 params.push_back("*");
1056                                 params.push_back("1");
1057                                 params.push_back(":"+InboundDescription);
1058                                 Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,InboundServerName);
1059                                 this->bursting = true;
1060                                 this->DoBurst(Node);
1061                         }
1062                         else if (command == "ERROR")
1063                         {
1064                                 return this->Error(params);
1065                         }
1066                         else if (command == "CAPAB")
1067                         {
1068                                 return this->Capab(params);
1069                         }
1070
1071                 break;
1072                 case LISTENER:
1073                         this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
1074                         return false;
1075                 break;
1076                 case CONNECTING:
1077                         if (command == "SERVER")
1078                         {
1079                                 // another server we connected to, which was in WAIT_AUTH_1 state,
1080                                 // has just sent us their credentials. If we get this far, theyre
1081                                 // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
1082                                 // if we're happy with this, we should send our netburst which
1083                                 // kickstarts the merge.
1084                                 return this->Outbound_Reply_Server(params);
1085                         }
1086                         else if (command == "ERROR")
1087                         {
1088                                 return this->Error(params);
1089                         }
1090                         else if (command == "CAPAB")
1091                         {
1092                                 return this->Capab(params);
1093                         }
1094                 break;
1095                 case CONNECTED:
1096                         // This is the 'authenticated' state, when all passwords
1097                         // have been exchanged and anything past this point is taken
1098                         // as gospel.
1099
1100                         if (prefix != "")
1101                         {
1102                                 std::string direction = prefix;
1103                                 userrec* t = this->Instance->FindNick(prefix);
1104                                 if (t)
1105                                 {
1106                                         direction = t->server;
1107                                 }
1108                                 TreeServer* route_back_again = Utils->BestRouteTo(direction);
1109                                 if ((!route_back_again) || (route_back_again->GetSocket() != this))
1110                                 {
1111                                         if (route_back_again)
1112                                                 Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
1113                                         return true;
1114                                 }
1115                                 /* Fix by brain:
1116                                  * When there is activity on the socket, reset the ping counter so
1117                                  * that we're not wasting bandwidth pinging an active server.
1118                                  */
1119                                 route_back_again->SetNextPingTime(time(NULL) + 60);
1120                                 route_back_again->SetPingFlag();
1121                         }
1122
1123                         if (command == "SVSMODE")
1124                         {
1125                                 /* Services expects us to implement
1126                                  * SVSMODE. In inspircd its the same as
1127                                  * MODE anyway.
1128                                  */
1129                                 command = "MODE";
1130                         }
1131                         std::string target = "";
1132                         /* Yes, know, this is a mess. Its reasonably fast though as we're
1133                          * working with std::string here.
1134                          */
1135                         if ((command == "NICK") && (params.size() >= 8))
1136                         {
1137                                 return this->IntroduceClient(prefix,params);
1138                         }
1139                         else if (command == "FJOIN")
1140                         {
1141                                 return this->ForceJoin(prefix,params);
1142                         }
1143                         else if (command == "STATS")
1144                         {
1145                                 return this->Stats(prefix, params);
1146                         }
1147                         else if (command == "MOTD")
1148                         {
1149                                 return this->Motd(prefix, params);
1150                         }
1151                         else if (command == "MODULES")
1152                         {
1153                                 return this->Modules(prefix, params);
1154                         }
1155                         else if (command == "ADMIN")
1156                         {
1157                                 return this->Admin(prefix, params);
1158                         }
1159                         else if (command == "SERVER")
1160                         {
1161                                 return this->RemoteServer(prefix,params);
1162                         }
1163                         else if (command == "ERROR")
1164                         {
1165                                 return this->Error(params);
1166                         }
1167                         else if (command == "OPERTYPE")
1168                         {
1169                                 return this->OperType(prefix,params);
1170                         }
1171                         else if (command == "FMODE")
1172                         {
1173                                 return this->ForceMode(prefix,params);
1174                         }
1175                         else if (command == "KILL")
1176                         {
1177                                 return this->RemoteKill(prefix,params);
1178                         }
1179                         else if (command == "FTOPIC")
1180                         {
1181                                 return this->ForceTopic(prefix,params);
1182                         }
1183                         else if (command == "REHASH")
1184                         {
1185                                 return this->RemoteRehash(prefix,params);
1186                         }
1187                         else if (command == "METADATA")
1188                         {
1189                                 return this->MetaData(prefix,params);
1190                         }
1191                         else if (command == "REMSTATUS")
1192                         {
1193                                 return this->RemoveStatus(prefix,params);
1194                         }
1195                         else if (command == "PING")
1196                         {
1197                                 /*
1198                                  * We just got a ping from a server that's bursting.
1199                                  * This can't be right, so set them to not bursting, and
1200                                  * apply their lines.
1201                                  */
1202                                 if (this->bursting)
1203                                 {
1204                                         this->bursting = false;
1205                                         Instance->XLines->apply_lines(Utils->lines_to_apply);
1206                                         Utils->lines_to_apply = 0;
1207                                 }
1208                                 if (prefix == "")
1209                                 {
1210                                         prefix = this->GetName();
1211                                 }
1212                                 return this->LocalPing(prefix,params);
1213                         }
1214                         else if (command == "PONG")
1215                         {
1216                                 /*
1217                                  * We just got a pong from a server that's bursting.
1218                                  * This can't be right, so set them to not bursting, and
1219                                  * apply their lines.
1220                                  */
1221                                 if (this->bursting)
1222                                 {
1223                                         this->bursting = false;
1224                                         Instance->XLines->apply_lines(Utils->lines_to_apply);
1225                                         Utils->lines_to_apply = 0;
1226                                 }
1227                                 if (prefix == "")
1228                                 {
1229                                         prefix = this->GetName();
1230                                 }
1231                                 return this->LocalPong(prefix,params);
1232                         }
1233                         else if (command == "VERSION")
1234                         {
1235                                 return this->ServerVersion(prefix,params);
1236                         }
1237                         else if (command == "FHOST")
1238                         {
1239                                 return this->ChangeHost(prefix,params);
1240                         }
1241                         else if (command == "FNAME")
1242                         {
1243                                 return this->ChangeName(prefix,params);
1244                         }
1245                         else if (command == "ADDLINE")
1246                         {
1247                                 return this->AddLine(prefix,params);
1248                         }
1249                         else if (command == "SVSNICK")
1250                         {
1251                                 if (prefix == "")
1252                                 {
1253                                         prefix = this->GetName();
1254                                 }
1255                                 return this->ForceNick(prefix,params);
1256                         }
1257                         else if (command == "OPERQUIT")
1258                         {
1259                                 return this->OperQuit(prefix,params);
1260                         }
1261                         else if (command == "RSQUIT")
1262                         {
1263                                 return this->RemoteSquit(prefix, params);
1264                         }
1265                         else if (command == "IDLE")
1266                         {
1267                                 return this->Whois(prefix,params);
1268                         }
1269                         else if (command == "PUSH")
1270                         {
1271                                 return this->Push(prefix,params);
1272                         }
1273                         else if (command == "TIMESET")
1274                         {
1275                                 return this->HandleSetTime(prefix, params);
1276                         }
1277                         else if (command == "TIME")
1278                         {
1279                                 return this->Time(prefix,params);
1280                         }
1281                         else if ((command == "KICK") && (Utils->IsServer(prefix)))
1282                         {
1283                                 std::string sourceserv = this->myhost;
1284                                 if (params.size() == 3)
1285                                 {
1286                                         userrec* user = this->Instance->FindNick(params[1]);
1287                                         chanrec* chan = this->Instance->FindChan(params[0]);
1288                                         if (user && chan)
1289                                         {
1290                                                 if (!chan->ServerKickUser(user, params[2].c_str(), false))
1291                                                         /* Yikes, the channels gone! */
1292                                                         delete chan;
1293                                         }
1294                                 }
1295                                 if (this->InboundServerName != "")
1296                                 {
1297                                         sourceserv = this->InboundServerName;
1298                                 }
1299                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1300                         }
1301                         else if (command == "SVSJOIN")
1302                         {
1303                                 if (prefix == "")
1304                                 {
1305                                         prefix = this->GetName();
1306                                 }
1307                                 return this->ServiceJoin(prefix,params);
1308                         }
1309                         else if (command == "SQUIT")
1310                         {
1311                                 if (params.size() == 2)
1312                                 {
1313                                         this->Squit(Utils->FindServer(params[0]),params[1]);
1314                                 }
1315                                 return true;
1316                         }
1317                         else if (command == "OPERNOTICE")
1318                         {
1319                                 std::string sourceserv = this->myhost;
1320                                 if (this->InboundServerName != "")
1321                                         sourceserv = this->InboundServerName;
1322                                 if (params.size() >= 1)
1323                                         Instance->WriteOpers("*** From " + sourceserv + ": " + params[0]);
1324                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1325                         }
1326                         else if (command == "MODENOTICE")
1327                         {
1328                                 std::string sourceserv = this->myhost;
1329                                 if (this->InboundServerName != "")
1330                                         sourceserv = this->InboundServerName;
1331                                 if (params.size() >= 2)
1332                                 {
1333                                         Instance->WriteMode(params[0].c_str(), WM_AND, "*** From %s: %s", sourceserv.c_str(), params[1].c_str());
1334                                 }
1335                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1336                         }
1337                         else if (command == "SNONOTICE")
1338                         {
1339                                 std::string sourceserv = this->myhost;
1340                                 if (this->InboundServerName != "")
1341                                         sourceserv = this->InboundServerName;
1342                                 if (params.size() >= 2)
1343                                 {
1344                                         Instance->SNO->WriteToSnoMask(*(params[0].c_str()), "From " + sourceserv + ": "+ params[1]);
1345                                 }
1346                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1347                         }
1348                         else if (command == "ENDBURST")
1349                         {
1350                                 this->bursting = false;
1351                                 Instance->XLines->apply_lines(Utils->lines_to_apply);
1352                                 Utils->lines_to_apply = 0;
1353                                 std::string sourceserv = this->myhost;
1354                                 if (this->InboundServerName != "")
1355                                 {
1356                                         sourceserv = this->InboundServerName;
1357                                 }
1358                                 this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
1359
1360                                 Event rmode((char*)sourceserv.c_str(), (Module*)Utils->Creator, "new_server");
1361                                 rmode.Send(Instance);
1362
1363                                 return true;
1364                         }
1365                         else
1366                         {
1367                                 // not a special inter-server command.
1368                                 // Emulate the actual user doing the command,
1369                                 // this saves us having a huge ugly parser.
1370                                 userrec* who = this->Instance->FindNick(prefix);
1371                                 std::string sourceserv = this->myhost;
1372                                 if (this->InboundServerName != "")
1373                                 {
1374                                         sourceserv = this->InboundServerName;
1375                                 }
1376                                 if ((!who) && (command == "MODE"))
1377                                 {
1378                                         if (Utils->IsServer(prefix))
1379                                         {
1380                                                 const char* modelist[127];
1381                                                 for (size_t i = 0; i < params.size(); i++)
1382                                                         modelist[i] = params[i].c_str();
1383                                                 userrec* fake = new userrec(Instance);
1384                                                 fake->SetFd(FD_MAGIC_NUMBER);
1385                                                 this->Instance->SendMode(modelist, params.size(), fake);
1386
1387                                                 delete fake;
1388                                                 /* Hot potato! pass it on! */
1389                                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1390                                         }
1391                                 }
1392                                 if (who)
1393                                 {
1394                                         if ((command == "NICK") && (params.size() > 0))
1395                                         {
1396                                                 /* On nick messages, check that the nick doesnt
1397                                                  * already exist here. If it does, kill their copy,
1398                                                  * and our copy.
1399                                                  */
1400                                                 userrec* x = this->Instance->FindNick(params[0]);
1401                                                 if ((x) && (x != who))
1402                                                 {
1403                                                         std::deque<std::string> p;
1404                                                         p.push_back(params[0]);
1405                                                         p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
1406                                                         Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
1407                                                         p.clear();
1408                                                         p.push_back(prefix);
1409                                                         p.push_back("Nickname collision");
1410                                                         Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
1411                                                         userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
1412                                                         userrec* y = this->Instance->FindNick(prefix);
1413                                                         if (y)
1414                                                         {
1415                                                                 userrec::QuitUser(this->Instance,y,"Nickname collision");
1416                                                         }
1417                                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1418                                                 }
1419                                         }
1420                                         // its a user
1421                                         target = who->server;
1422                                         const char* strparams[127];
1423                                         for (unsigned int q = 0; q < params.size(); q++)
1424                                         {
1425                                                 strparams[q] = params[q].c_str();
1426                                         }
1427                                         switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
1428                                         {
1429                                                 case CMD_INVALID:
1430                                                         this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
1431                                                         return false;
1432                                                 break;
1433                                                 case CMD_FAILURE:
1434                                                         return true;
1435                                                 break;
1436                                                 default:
1437                                                         /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
1438                                                 break;
1439                                         }
1440                                 }
1441                                 else
1442                                 {
1443                                         // its not a user. Its either a server, or somethings screwed up.
1444                                         if (Utils->IsServer(prefix))
1445                                                 target = this->Instance->Config->ServerName;
1446                                         else
1447                                                 return true;
1448                                 }
1449                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1450
1451                         }
1452                         return true;
1453                 break;
1454         }
1455         return true;
1456 }
1457
1458 std::string TreeSocket::GetName()
1459 {
1460         std::string sourceserv = this->myhost;
1461         if (this->InboundServerName != "")
1462         {
1463                 sourceserv = this->InboundServerName;
1464         }
1465         return sourceserv;
1466 }
1467
1468 void TreeSocket::OnTimeout()
1469 {
1470         if (this->LinkState == CONNECTING)
1471         {
1472                 this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out.");
1473                 Link* MyLink = Utils->FindLink(myhost);
1474                 if (MyLink)
1475                         Utils->DoFailOver(MyLink);
1476         }
1477 }
1478
1479 void TreeSocket::OnClose()
1480 {
1481         // Connection closed.
1482         // If the connection is fully up (state CONNECTED)
1483         // then propogate a netsplit to all peers.
1484         std::string quitserver = this->myhost;
1485         if (this->InboundServerName != "")
1486         {
1487                 quitserver = this->InboundServerName;
1488         }
1489         TreeServer* s = Utils->FindServer(quitserver);
1490         if (s)
1491         {
1492                 Squit(s,"Remote host closed the connection");
1493         }
1494
1495         if (quitserver != "")
1496                 this->Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' failed.",quitserver.c_str());
1497 }
1498
1499 int TreeSocket::OnIncomingConnection(int newsock, char* ip)
1500 {
1501         /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
1502          * or discovering if this port is the server port, we don't allow connections from any
1503          * IPs for which we don't have a link block.
1504          */
1505         bool found = false;
1506
1507         found = (std::find(Utils->ValidIPs.begin(), Utils->ValidIPs.end(), ip) != Utils->ValidIPs.end());
1508         if (!found)
1509         {
1510                 for (vector<std::string>::iterator i = Utils->ValidIPs.begin(); i != Utils->ValidIPs.end(); i++)
1511                         if (irc::sockets::MatchCIDR(ip, (*i).c_str()))
1512                                 found = true;
1513
1514                 if (!found)
1515                 {
1516                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from %s denied (no link blocks with that IP address)", ip);
1517                         close(newsock);
1518                         return false;
1519                 }
1520         }
1521
1522         TreeSocket* s = new TreeSocket(this->Utils, this->Instance, newsock, ip, this->Hook);
1523         s = s; /* Whinge whinge whinge, thats all GCC ever does. */
1524         return true;
1525 }