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
  45 /* Handle ERROR command */
  46 bool TreeSocket::Error(std::deque<std::string> &params)
  47 {
  48         if (params.size() < 1)
  49                 return false;
  50         this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
  51         /* we will return false to cause the socket to close. */
  52         return false;
  53 }
  54
  55 bool TreeSocket::Modules(const std::string &prefix, std::deque<std::string> &params)
  56 {
  57         if (params.empty())
  58                 return true;
  59
  60         if (!this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
  61         {
  62                 /* Pass it on, not for us */
  63                 Utils->DoOneToOne(prefix, "MODULES", params, params[0]);
  64                 return true;
  65         }
  66
  67         char strbuf[MAXBUF];
  68         std::deque<std::string> par;
  69         par.push_back(prefix);
  70         par.push_back("");
  71
  72         userrec* source = this->Instance->FindNick(prefix);
  73         if (!source)
  74                 return true;
  75
  76         for (unsigned int i = 0; i < Instance->Config->module_names.size(); i++)
  77         {
  78                 Version V = Instance->modules[i]->GetVersion();
  79                 char modulename[MAXBUF];
  80                 char flagstate[MAXBUF];
  81                 *flagstate = 0;
  82                 if (V.Flags & VF_STATIC)
  83                         strlcat(flagstate,", static",MAXBUF);
  84                 if (V.Flags & VF_VENDOR)
  85                         strlcat(flagstate,", vendor",MAXBUF);
  86                 if (V.Flags & VF_COMMON)
  87                         strlcat(flagstate,", common",MAXBUF);
  88                 if (V.Flags & VF_SERVICEPROVIDER)
  89                         strlcat(flagstate,", service provider",MAXBUF);
  90                 if (!flagstate[0])
  91                         strcpy(flagstate,"  <no flags>");
  92                 strlcpy(modulename,Instance->Config->module_names[i].c_str(),256);
  93                 if (*source->oper)
  94                 {
  95                         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);
  96                 }
  97                 else
  98                 {
  99                         snprintf(strbuf, MAXBUF, "::%s 900 %s :%s",Instance->Config->ServerName,source->nick,ServerConfig::CleanFilename(modulename));
 100                 }
 101                 par[1] = strbuf;
 102                 Utils->DoOneToOne(Instance->Config->ServerName, "PUSH", par, source->server);
 103         }
 104         snprintf(strbuf, MAXBUF, "::%s 901 %s :End of MODULES list", Instance->Config->ServerName, source->nick);
 105         par[1] = strbuf;
 106         Utils->DoOneToOne(Instance->Config->ServerName, "PUSH", par, source->server);
 107         return true;
 108 }
 109
 110 /** remote MOTD. leet, huh? */
 111 bool TreeSocket::Motd(const std::string &prefix, std::deque<std::string> &params)
 112 {
 113         if (params.size() > 0)
 114         {
 115                 if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
 116                 {
 117                         /* It's for our server */
 118                         string_list results;
 119                         userrec* source = this->Instance->FindNick(prefix);
 120
 121                         if (source)
 122                         {
 123                                 std::deque<std::string> par;
 124                                 par.push_back(prefix);
 125                                 par.push_back("");
 126
 127                                 if (!Instance->Config->MOTD.size())
 128                                 {
 129                                         par[1] = std::string("::")+Instance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
 130                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 131                                         return true;
 132                                 }
 133
 134                                 par[1] = std::string("::")+Instance->Config->ServerName+" 375 "+source->nick+" :"+Instance->Config->ServerName+" message of the day";
 135                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 136
 137                                 for (unsigned int i = 0; i < Instance->Config->MOTD.size(); i++)
 138                                 {
 139                                         par[1] = std::string("::")+Instance->Config->ServerName+" 372 "+source->nick+" :- "+Instance->Config->MOTD[i];
 140                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 141                                 }
 142
 143                                 par[1] = std::string("::")+Instance->Config->ServerName+" 376 "+source->nick+" End of message of the day.";
 144                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 145                         }
 146                 }
 147                 else
 148                 {
 149                         /* Pass it on */
 150                         userrec* source = this->Instance->FindNick(prefix);
 151                         if (source)
 152                                 Utils->DoOneToOne(prefix, "MOTD", params, params[0]);
 153                 }
 154         }
 155         return true;
 156 }
 157
 158 /** remote ADMIN. leet, huh? */
 159 bool TreeSocket::Admin(const std::string &prefix, std::deque<std::string> &params)
 160 {
 161         if (params.size() > 0)
 162         {
 163                 if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
 164                 {
 165                         /* It's for our server */
 166                         string_list results;
 167                         userrec* source = this->Instance->FindNick(prefix);
 168                         if (source)
 169                         {
 170                                 std::deque<std::string> par;
 171                                 par.push_back(prefix);
 172                                 par.push_back("");
 173                                 par[1] = std::string("::")+Instance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+Instance->Config->ServerName;
 174                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 175                                 par[1] = std::string("::")+Instance->Config->ServerName+" 257 "+source->nick+" :Name     - "+Instance->Config->AdminName;
 176                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 177                                 par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+Instance->Config->AdminNick;
 178                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 179                                 par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+Instance->Config->AdminEmail;
 180                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 181                         }
 182                 }
 183                 else
 184                 {
 185                         /* Pass it on */
 186                         userrec* source = this->Instance->FindNick(prefix);
 187                         if (source)
 188                                 Utils->DoOneToOne(prefix, "ADMIN", params, params[0]);
 189                 }
 190         }
 191         return true;
 192 }
 193
 194 bool TreeSocket::Stats(const std::string &prefix, std::deque<std::string> &params)
 195 {
 196         /* Get the reply to a STATS query if it matches this servername,
 197          * and send it back as a load of PUSH queries
 198          */
 199         if (params.size() > 1)
 200         {
 201                 if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
 202                 {
 203                         /* It's for our server */
 204                         string_list results;
 205                         userrec* source = this->Instance->FindNick(prefix);
 206                         if (source)
 207                         {
 208                                 std::deque<std::string> par;
 209                                 par.push_back(prefix);
 210                                 par.push_back("");
 211                                 DoStats(this->Instance, *(params[0].c_str()), source, results);
 212                                 for (size_t i = 0; i < results.size(); i++)
 213                                 {
 214                                         par[1] = "::" + results[i];
 215                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 216                                 }
 217                         }
 218                 }
 219                 else
 220                 {
 221                         /* Pass it on */
 222                         userrec* source = this->Instance->FindNick(prefix);
 223                         if (source)
 224                                 Utils->DoOneToOne(prefix, "STATS", params, params[1]);
 225                 }
 226         }
 227         return true;
 228 }
 229
 230
 231 /** Because the core won't let users or even SERVERS set +o,
 232  * we use the OPERTYPE command to do this.
 233  */
 234 bool TreeSocket::OperType(const std::string &prefix, std::deque<std::string> &params)
 235 {
 236         if (params.size() != 1)
 237                 return true;
 238         std::string opertype = params[0];
 239         userrec* u = this->Instance->FindNick(prefix);
 240         if (u)
 241         {
 242                 u->modes[UM_OPERATOR] = 1;
 243                 this->Instance->all_opers.push_back(u);
 244                 strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
 245                 Utils->DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
 246                 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()));
 247         }
 248         return true;
 249 }
 250
 251 /** Because Andy insists that services-compatible servers must
 252  * implement SVSNICK and SVSJOIN, that's exactly what we do :p
 253  */
 254 bool TreeSocket::ForceNick(const std::string &prefix, std::deque<std::string> &params)
 255 {
 256         if (params.size() < 3)
 257                 return true;
 258
 259         userrec* u = this->Instance->FindNick(params[0]);
 260
 261         if (u)
 262         {
 263                 Utils->DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
 264                 if (IS_LOCAL(u))
 265                 {
 266                         std::deque<std::string> par;
 267                         par.push_back(params[1]);
 268                         if (!u->ForceNickChange(params[1].c_str()))
 269                         {
 270                                 userrec::QuitUser(this->Instance, u, "Nickname collision");
 271                                 return true;
 272                         }
 273                         u->age = atoi(params[2].c_str());
 274                 }
 275         }
 276         return true;
 277 }
 278
 279 bool TreeSocket::OperQuit(const std::string &prefix, std::deque<std::string> &params)
 280 {
 281         if (params.size() < 1)
 282                 return true;
 283
 284         userrec* u = this->Instance->FindNick(prefix);
 285
 286         if (u)
 287         {
 288                 Utils->DoOneToAllButSender(prefix,"OPERQUIT",params,prefix);
 289                 u->SetOperQuit(params[0]);
 290         }
 291         return true;
 292 }
 293
 294 /*
 295  * Remote SQUIT (RSQUIT). Routing works similar to SVSNICK: Route it to the server that the target is connected to locally,
 296  * then let that server do the dirty work (squit it!). Example:
 297  * 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
 298  */
 299 bool TreeSocket::RemoteSquit(const std::string &prefix, std::deque<std::string> &params)
 300 {
 301         /* ok.. :w00t RSQUIT jupe.barafranca.com :reason here */
 302         if (params.size() < 2)
 303                 return true;
 304
 305         TreeServer* s = Utils->FindServerMask(params[0]);
 306
 307         if (s)
 308         {
 309                 if (s == Utils->TreeRoot)
 310                 {
 311                         this->Instance->SNO->WriteToSnoMask('l',"What the fuck, I recieved a remote SQUIT for myself? :< (from %s", prefix.c_str());
 312                         return true;
 313                 }
 314
 315                 TreeSocket* sock = s->GetSocket();
 316
 317                 if (sock)
 318                 {
 319                         /* it's locally connected, KILL IT! */
 320                         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());
 321                         sock->Squit(s,"Server quit by " + prefix + ": " + params[1]);
 322                         Instance->SE->DelFd(sock);
 323                         sock->Close();
 324                         delete sock;
 325                 }
 326                 else
 327                 {
 328                         /* route the rsquit */
 329                         params[1] = ":" + params[1];
 330                         Utils->DoOneToOne(prefix, "RSQUIT", params, params[0]);
 331                 }
 332         }
 333         else
 334         {
 335                 /* mother fucker! it doesn't exist */
 336         }
 337
 338         return true;
 339 }
 340
 341 bool TreeSocket::ServiceJoin(const std::string &prefix, std::deque<std::string> &params)
 342 {
 343         if (params.size() < 2)
 344                 return true;
 345
 346         userrec* u = this->Instance->FindNick(params[0]);
 347
 348         if (u)
 349         {
 350                 /* only join if it's local, otherwise just pass it on! */
 351                 if (IS_LOCAL(u))
 352                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false, "", Instance->Time());
 353                 Utils->DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
 354         }
 355         return true;
 356 }
 357
 358 bool TreeSocket::RemoteRehash(const std::string &prefix, std::deque<std::string> &params)
 359 {
 360         if (params.size() < 1)
 361                 return false;
 362
 363         std::string servermask = params[0];
 364
 365         if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
 366         {
 367                 this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated by \002"+prefix+"\002.");
 368                 this->Instance->RehashServer();
 369                 Utils->ReadConfiguration(false);
 370                 InitializeDisabledCommands(Instance->Config->DisabledCommands, Instance);
 371         }
 372         Utils->DoOneToAllButSender(prefix,"REHASH",params,prefix);
 373         return true;
 374 }
 375
 376 bool TreeSocket::RemoteKill(const std::string &prefix, std::deque<std::string> &params)
 377 {
 378         if (params.size() != 2)
 379                 return true;
 380
 381         std::string nick = params[0];
 382         userrec* u = this->Instance->FindNick(prefix);
 383         userrec* who = this->Instance->FindNick(nick);
 384
 385         if (who)
 386         {
 387                 /* Prepend kill source, if we don't have one */
 388                 std::string sourceserv = prefix;
 389                 if (u)
 390                 {
 391                         sourceserv = u->server;
 392                 }
 393                 if (*(params[1].c_str()) != '[')
 394                 {
 395                         params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
 396                 }
 397                 std::string reason = params[1];
 398                 params[1] = ":" + params[1];
 399                 Utils->DoOneToAllButSender(prefix,"KILL",params,sourceserv);
 400                 who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
 401                 userrec::QuitUser(this->Instance,who,reason);
 402         }
 403         return true;
 404 }
 405
 406 bool TreeSocket::LocalPong(const std::string &prefix, std::deque<std::string> &params)
 407 {
 408         if (params.size() < 1)
 409                 return true;
 410
 411         if (params.size() == 1)
 412         {
 413                 TreeServer* ServerSource = Utils->FindServer(prefix);
 414                 if (ServerSource)
 415                 {
 416                         ServerSource->SetPingFlag();
 417                         ServerSource->rtt = Instance->Time() - ServerSource->LastPing;
 418                 }
 419         }
 420         else
 421         {
 422                 std::string forwardto = params[1];
 423                 if (forwardto == this->Instance->Config->ServerName)
 424                 {
 425                         /*
 426                          * this is a PONG for us
 427                          * if the prefix is a user, check theyre local, and if they are,
 428                          * dump the PONG reply back to their fd. If its a server, do nowt.
 429                          * Services might want to send these s->s, but we dont need to yet.
 430                          */
 431                         userrec* u = this->Instance->FindNick(prefix);
 432                         if (u)
 433                         {
 434                                 u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
 435                         }
 436                 }
 437                 else
 438                 {
 439                         // not for us, pass it on :)
 440                         Utils->DoOneToOne(prefix,"PONG",params,forwardto);
 441                 }
 442         }
 443
 444         return true;
 445 }
 446
 447 bool TreeSocket::MetaData(const std::string &prefix, std::deque<std::string> &params)
 448 {
 449         if (params.size() < 2)
 450                 return true;
 451         else if (params.size() < 3)
 452                 params.push_back("");
 453         TreeServer* ServerSource = Utils->FindServer(prefix);
 454         if (ServerSource)
 455         {
 456                 if (params[0] == "*")
 457                 {
 458                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
 459                 }
 460                 else if (*(params[0].c_str()) == '#')
 461                 {
 462                         chanrec* c = this->Instance->FindChan(params[0]);
 463                         if (c)
 464                         {
 465                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
 466                         }
 467                 }
 468                 else if (*(params[0].c_str()) != '#')
 469                 {
 470                         userrec* u = this->Instance->FindNick(params[0]);
 471                         if (u)
 472                         {
 473                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
 474                         }
 475                 }
 476         }
 477
 478         params[2] = ":" + params[2];
 479         Utils->DoOneToAllButSender(prefix,"METADATA",params,prefix);
 480         return true;
 481 }
 482
 483 bool TreeSocket::ServerVersion(const std::string &prefix, std::deque<std::string> &params)
 484 {
 485         if (params.size() < 1)
 486                 return true;
 487
 488         TreeServer* ServerSource = Utils->FindServer(prefix);
 489
 490         if (ServerSource)
 491         {
 492                 ServerSource->SetVersion(params[0]);
 493         }
 494         params[0] = ":" + params[0];
 495         Utils->DoOneToAllButSender(prefix,"VERSION",params,prefix);
 496         return true;
 497 }
 498
 499 bool TreeSocket::ChangeHost(const std::string &prefix, std::deque<std::string> &params)
 500 {
 501         if (params.size() < 1)
 502                 return true;
 503         userrec* u = this->Instance->FindNick(prefix);
 504
 505         if (u)
 506         {
 507                 u->ChangeDisplayedHost(params[0].c_str());
 508                 Utils->DoOneToAllButSender(prefix,"FHOST",params,u->server);
 509         }
 510         return true;
 511 }
 512
 513 bool TreeSocket::AddLine(const std::string &prefix, std::deque<std::string> &params)
 514 {
 515         if (params.size() < 6)
 516                 return true;
 517         bool propogate = false;
 518         if (!this->bursting)
 519                 Utils->lines_to_apply = 0;
 520         switch (*(params[0].c_str()))
 521         {
 522                 case 'Z':
 523                         propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 524                         Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 525                         if (propogate)
 526                                 Utils->lines_to_apply |= APPLY_ZLINES;
 527                 break;
 528                 case 'Q':
 529                         propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 530                         Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 531                         if (propogate)
 532                                 Utils->lines_to_apply |= APPLY_QLINES;
 533                 break;
 534                 case 'E':
 535                         propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 536                         Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 537                 break;
 538                 case 'G':
 539                         propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 540                         Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 541                         if (propogate)
 542                                 Utils->lines_to_apply |= APPLY_GLINES;
 543                 break;
 544                 case 'K':
 545                         propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 546                         if (propogate)
 547                                 Utils->lines_to_apply |= APPLY_KLINES;
 548                 break;
 549                 default:
 550                         /* Just in case... */
 551                         this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
 552                         propogate = false;
 553                 break;
 554         }
 555         /* Send it on its way */
 556         if (propogate)
 557         {
 558                 if (atoi(params[4].c_str()))
 559                 {
 560                         time_t c_requires_crap = ConvToInt(params[4]) + Instance->Time();
 561                         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());
 562                 }
 563                 else
 564                 {
 565                         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());
 566                 }
 567                 params[5] = ":" + params[5];
 568                 Utils->DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
 569         }
 570         if (!this->bursting)
 571         {
 572                 Instance->XLines->apply_lines(Utils->lines_to_apply);
 573                 Utils->lines_to_apply = 0;
 574         }
 575         return true;
 576 }
 577
 578 bool TreeSocket::ChangeName(const std::string &prefix, std::deque<std::string> &params)
 579 {
 580         if (params.size() < 1)
 581                 return true;
 582         userrec* u = this->Instance->FindNick(prefix);
 583         if (u)
 584         {
 585                 u->ChangeName(params[0].c_str());
 586                 params[0] = ":" + params[0];
 587                 Utils->DoOneToAllButSender(prefix,"FNAME",params,u->server);
 588         }
 589         return true;
 590 }
 591
 592 bool TreeSocket::Whois(const std::string &prefix, std::deque<std::string> &params)
 593 {
 594         if (params.size() < 1)
 595                 return true;
 596         userrec* u = this->Instance->FindNick(prefix);
 597         if (u)
 598         {
 599                 // an incoming request
 600                 if (params.size() == 1)
 601                 {
 602                         userrec* x = this->Instance->FindNick(params[0]);
 603                         if ((x) && (IS_LOCAL(x)))
 604                         {
 605                                 userrec* x = this->Instance->FindNick(params[0]);
 606                                 char signon[MAXBUF];
 607                                 char idle[MAXBUF];
 608                                 snprintf(signon, MAXBUF, "%lu", (unsigned long)x->signon);
 609                                 snprintf(idle, MAXBUF, "%lu", (unsigned long)abs((x->idle_lastmsg) - Instance->Time(true)));
 610                                 std::deque<std::string> par;
 611                                 par.push_back(prefix);
 612                                 par.push_back(signon);
 613                                 par.push_back(idle);
 614                                 // ours, we're done, pass it BACK
 615                                 Utils->DoOneToOne(params[0], "IDLE", par, u->server);
 616                         }
 617                         else
 618                         {
 619                                 // not ours pass it on
 620                                 if (x)
 621                                         Utils->DoOneToOne(prefix, "IDLE", params, x->server);
 622                         }
 623                 }
 624                 else if (params.size() == 3)
 625                 {
 626                         std::string who_did_the_whois = params[0];
 627                         userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
 628                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
 629                         {
 630                                 // an incoming reply to a whois we sent out
 631                                 std::string nick_whoised = prefix;
 632                                 unsigned long signon = atoi(params[1].c_str());
 633                                 unsigned long idle = atoi(params[2].c_str());
 634                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
 635                                         do_whois(this->Instance, who_to_send_to, u, signon, idle, nick_whoised.c_str());
 636                         }
 637                         else
 638                         {
 639                                 // not ours, pass it on
 640                                 if (who_to_send_to)
 641                                         Utils->DoOneToOne(prefix, "IDLE", params, who_to_send_to->server);
 642                         }
 643                 }
 644         }
 645         return true;
 646 }
 647
 648 bool TreeSocket::Push(const std::string &prefix, std::deque<std::string> &params)
 649 {
 650         if (params.size() < 2)
 651                 return true;
 652         userrec* u = this->Instance->FindNick(params[0]);
 653         if (!u)
 654                 return true;
 655         if (IS_LOCAL(u))
 656         {
 657                 u->Write(params[1]);
 658         }
 659         else
 660         {
 661                 // continue the raw onwards
 662                 params[1] = ":" + params[1];
 663                 Utils->DoOneToOne(prefix,"PUSH",params,u->server);
 664         }
 665         return true;
 666 }
 667
 668 bool TreeSocket::HandleSetTime(const std::string &prefix, std::deque<std::string> &params)
 669 {
 670         if (!params.size() || !Utils->EnableTimeSync)
 671                 return true;
 672
 673         bool force = false;
 674
 675         if ((params.size() == 2) && (params[1] == "FORCE"))
 676                 force = true;
 677
 678         time_t them = atoi(params[0].c_str());
 679         time_t us = Instance->Time(false);
 680
 681         time_t diff = them - us;
 682
 683         Utils->DoOneToAllButSender(prefix, "TIMESET", params, prefix);
 684
 685         if (force || (them != us))
 686         {
 687                 time_t old = Instance->SetTimeDelta(diff);
 688                 Instance->Log(DEBUG, "TS (diff %d) from %s applied (old delta was %d)", diff, prefix.c_str(), old);
 689         }
 690
 691         return true;
 692 }
 693
 694 bool TreeSocket::Time(const std::string &prefix, std::deque<std::string> &params)
 695 {
 696         // :source.server TIME remote.server sendernick
 697         // :remote.server TIME source.server sendernick TS
 698         if (params.size() == 2)
 699         {
 700                 // someone querying our time?
 701                 if (this->Instance->Config->ServerName == params[0])
 702                 {
 703                         userrec* u = this->Instance->FindNick(params[1]);
 704                         if (u)
 705                         {
 706                                 params.push_back(ConvToStr(Instance->Time(false)));
 707                                 params[0] = prefix;
 708                                 Utils->DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
 709                         }
 710                 }
 711                 else
 712                 {
 713                         // not us, pass it on
 714                         userrec* u = this->Instance->FindNick(params[1]);
 715                         if (u)
 716                                 Utils->DoOneToOne(prefix,"TIME",params,params[0]);
 717                 }
 718         }
 719         else if (params.size() == 3)
 720         {
 721                 // a response to a previous TIME
 722                 userrec* u = this->Instance->FindNick(params[1]);
 723                 if ((u) && (IS_LOCAL(u)))
 724                 {
 725                         time_t rawtime = atol(params[2].c_str());
 726                         struct tm * timeinfo;
 727                         timeinfo = localtime(&rawtime);
 728                         char tms[26];
 729                         snprintf(tms,26,"%s",asctime(timeinfo));
 730                         tms[24] = 0;
 731                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
 732                 }
 733                 else
 734                 {
 735                         if (u)
 736                                 Utils->DoOneToOne(prefix,"TIME",params,u->server);
 737                 }
 738         }
 739         return true;
 740 }
 741
 742 bool TreeSocket::LocalPing(const std::string &prefix, std::deque<std::string> &params)
 743 {
 744         if (params.size() < 1)
 745                 return true;
 746         if (params.size() == 1)
 747         {
 748                 std::string stufftobounce = params[0];
 749                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
 750                 return true;
 751         }
 752         else
 753         {
 754                 std::string forwardto = params[1];
 755                 if (forwardto == this->Instance->Config->ServerName)
 756                 {
 757                         // this is a ping for us, send back PONG to the requesting server
 758                         params[1] = params[0];
 759                         params[0] = forwardto;
 760                         Utils->DoOneToOne(forwardto,"PONG",params,params[1]);
 761                 }
 762                 else
 763                 {
 764                         // not for us, pass it on :)
 765                         Utils->DoOneToOne(prefix,"PING",params,forwardto);
 766                 }
 767                 return true;
 768         }
 769 }
 770
 771 /** TODO: This creates a total mess of output and needs to really use irc::modestacker.
 772  */
 773 bool TreeSocket::RemoveStatus(const std::string &prefix, std::deque<std::string> &params)
 774 {
 775         if (params.size() < 1)
 776                 return true;
 777         chanrec* c = Instance->FindChan(params[0]);
 778         if (c)
 779         {
 780                 for (char modeletter = 'A'; modeletter <= 'z'; modeletter++)
 781                 {
 782                         ModeHandler* mh = Instance->Modes->FindMode(modeletter, MODETYPE_CHANNEL);
 783                         if (mh)
 784                                 mh->RemoveMode(c);
 785                 }
 786         }
 787         return true;
 788 }
 789
 790 bool TreeSocket::RemoteServer(const std::string &prefix, std::deque<std::string> &params)
 791 {
 792         if (params.size() < 4)
 793                 return false;
 794         std::string servername = params[0];
 795         std::string password = params[1];
 796         // hopcount is not used for a remote server, we calculate this ourselves
 797         std::string description = params[3];
 798         TreeServer* ParentOfThis = Utils->FindServer(prefix);
 799         if (!ParentOfThis)
 800         {
 801                 this->SendError("Protocol error - Introduced remote server from unknown server "+prefix);
 802                 return false;
 803         }
 804         TreeServer* CheckDupe = Utils->FindServer(servername);
 805         if (CheckDupe)
 806         {
 807                 this->SendError("Server "+servername+" already exists!");
 808                 this->Instance->SNO->WriteToSnoMask('l',"Server \2"+servername+"\2 being introduced from \2" + prefix + "\2 denied, already exists. Closing link with " + prefix);
 809                 return false;
 810         }
 811         Link* lnk = Utils->FindLink(servername);
 812         TreeServer* Node = new TreeServer(this->Utils,this->Instance,servername,description,ParentOfThis,NULL, lnk ? lnk->Hidden : false);
 813         ParentOfThis->AddChild(Node);
 814         params[3] = ":" + params[3];
 815         Utils->DoOneToAllButSender(prefix,"SERVER",params,prefix);
 816         this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
 817         return true;
 818 }
 819
 820 bool TreeSocket::ComparePass(const std::string &ours, const std::string &theirs)
 821 {
 822         if ((!strncmp(ours.c_str(), "HMAC-SHA256:", 12)) || (!strncmp(theirs.c_str(), "HMAC-SHA256:", 12)))
 823         {
 824                 /* One or both of us specified hmac sha256, but we don't have sha256 module loaded!
 825                  * We can't allow this password as valid.
 826                  */
 827                 if (!Instance->FindModule("m_sha256.so") || !Utils->ChallengeResponse)
 828                                 return false;
 829                 else
 830                         /* Straight string compare of hashes */
 831                         return ours == theirs;
 832         }
 833         else
 834                 /* Straight string compare of plaintext */
 835                 return ours == theirs;
 836 }
 837
 838 bool TreeSocket::Outbound_Reply_Server(std::deque<std::string> &params)
 839 {
 840         if (params.size() < 4)
 841                 return false;
 842
 843         irc::string servername = params[0].c_str();
 844         std::string sname = params[0];
 845         std::string password = params[1];
 846         std::string description = params[3];
 847         int hops = atoi(params[2].c_str());
 848
 849         this->InboundServerName = sname;
 850         this->InboundDescription = description;
 851
 852         if (hops)
 853         {
 854                 this->SendError("Server too far away for authentication");
 855                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
 856                 return false;
 857         }
 858
 859         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 860         {
 861                 if ((x->Name == servername) && ((ComparePass(this->MakePass(x->RecvPass,this->GetOurChallenge()),password)) || (x->RecvPass == password && (this->GetTheirChallenge().empty()))))
 862                 {
 863                         TreeServer* CheckDupe = Utils->FindServer(sname);
 864                         if (CheckDupe)
 865                         {
 866                                 this->SendError("Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
 867                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
 868                                 return false;
 869                         }
 870                         // Begin the sync here. this kickstarts the
 871                         // other side, waiting in WAIT_AUTH_2 state,
 872                         // into starting their burst, as it shows
 873                         // that we're happy.
 874                         this->LinkState = CONNECTED;
 875                         // we should add the details of this server now
 876                         // to the servers tree, as a child of the root
 877                         // node.
 878                         TreeServer* Node = new TreeServer(this->Utils,this->Instance,sname,description,Utils->TreeRoot,this,x->Hidden);
 879                         Utils->TreeRoot->AddChild(Node);
 880                         params[3] = ":" + params[3];
 881                         Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,sname);
 882                         this->bursting = true;
 883                         this->DoBurst(Node);
 884                         return true;
 885                 }
 886         }
 887         this->SendError("Invalid credentials");
 888         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
 889         return false;
 890 }
 891
 892 bool TreeSocket::Inbound_Server(std::deque<std::string> &params)
 893 {
 894         if (params.size() < 4)
 895                 return false;
 896         irc::string servername = params[0].c_str();
 897         std::string sname = params[0];
 898         std::string password = params[1];
 899         std::string description = params[3];
 900         int hops = atoi(params[2].c_str());
 901
 902         this->InboundServerName = sname;
 903         this->InboundDescription = description;
 904
 905         if (hops)
 906         {
 907                 this->SendError("Server too far away for authentication");
 908                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
 909                 return false;
 910         }
 911
 912         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 913         {
 914                 if ((x->Name == servername) && ((ComparePass(this->MakePass(x->RecvPass,this->GetOurChallenge()),password) || x->RecvPass == password && (this->GetTheirChallenge().empty()))))
 915                 {
 916                         /* First check for instances of the server that are waiting between the inbound and outbound SERVER command */
 917                         TreeSocket* CheckDupeSocket = Utils->FindBurstingServer(sname);
 918                         if (CheckDupeSocket)
 919                         {
 920                                 /* If we find one, we abort the link to prevent a race condition */
 921                                 this->SendError("Negotiation collision");
 922                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists in a negotiating state.");
 923                                 CheckDupeSocket->SendError("Negotiation collision");
 924                                 Instance->SE->DelFd(CheckDupeSocket);
 925                                 CheckDupeSocket->Close();
 926                                 delete CheckDupeSocket;
 927                                 return false;
 928                         }
 929                         /* Now check for fully initialized instances of the server */
 930                         TreeServer* CheckDupe = Utils->FindServer(sname);
 931                         if (CheckDupe)
 932                         {
 933                                 this->SendError("Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
 934                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
 935                                 return false;
 936                         }
 937                         this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
 938                         if (this->Hook)
 939                         {
 940                                 std::string name = InspSocketNameRequest((Module*)Utils->Creator, this->Hook).Send();
 941                                 this->Instance->SNO->WriteToSnoMask('l',"Connection from \2"+sname+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] using transport \2"+name+"\2");
 942                         }
 943
 944                         Utils->AddBurstingServer(sname,this);
 945
 946                         // this is good. Send our details: Our server name and description and hopcount of 0,
 947                         // along with the sendpass from this block.
 948                         this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+this->MakePass(x->SendPass, this->GetTheirChallenge())+" 0 :"+this->Instance->Config->ServerDesc);
 949                         // move to the next state, we are now waiting for THEM.
 950                         this->LinkState = WAIT_AUTH_2;
 951                         return true;
 952                 }
 953         }
 954         this->SendError("Invalid credentials");
 955         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
 956         return false;
 957 }
 958
 959 void TreeSocket::Split(const std::string &line, std::deque<std::string> &n)
 960 {
 961         n.clear();
 962         irc::tokenstream tokens(line);
 963         std::string param;
 964         while (tokens.GetToken(param))
 965                 n.push_back(param);
 966         return;
 967 }
 968
 969 bool TreeSocket::ProcessLine(std::string &line)
 970 {
 971         std::deque<std::string> params;
 972         irc::string command;
 973         std::string prefix;
 974
 975         line = line.substr(0, line.find_first_of("\r\n"));
 976
 977         if (line.empty())
 978                 return true;
 979
 980         Instance->Log(DEBUG, "<- %s", line.c_str());
 981
 982         this->Split(line.c_str(),params);
 983
 984         if ((params[0][0] == ':') && (params.size() > 1))
 985         {
 986                 prefix = params[0].substr(1);
 987                 params.pop_front();
 988         }
 989         command = params[0].c_str();
 990         params.pop_front();
 991         switch (this->LinkState)
 992         {
 993                 TreeServer* Node;
 994
 995                 case WAIT_AUTH_1:
 996                         // Waiting for SERVER command from remote server. Server initiating
 997                         // the connection sends the first SERVER command, listening server
 998                         // replies with theirs if its happy, then if the initiator is happy,
 999                         // it starts to send its net sync, which starts the merge, otherwise
1000                         // it sends an ERROR.
1001                         if (command == "PASS")
1002                         {
1003                                 /* Silently ignored */
1004                         }
1005                         else if (command == "SERVER")
1006                         {
1007                                 return this->Inbound_Server(params);
1008                         }
1009                         else if (command == "ERROR")
1010                         {
1011                                 return this->Error(params);
1012                         }
1013                         else if (command == "USER")
1014                         {
1015                                 this->SendError("Client connections to this port are prohibited.");
1016                                 return false;
1017                         }
1018                         else if (command == "CAPAB")
1019                         {
1020                                 return this->Capab(params);
1021                         }
1022                         else if ((command == "U") || (command == "S"))
1023                         {
1024                                 this->SendError("Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
1025                                 return false;
1026                         }
1027                         else
1028                         {
1029                                 irc::string error = "Invalid command in negotiation phase: " + command;
1030                                 this->SendError(assign(error));
1031                                 return false;
1032                         }
1033                 break;
1034                 case WAIT_AUTH_2:
1035                         // Waiting for start of other side's netmerge to say they liked our
1036                         // password.
1037                         if (command == "SERVER")
1038                         {
1039                                 // cant do this, they sent it to us in the WAIT_AUTH_1 state!
1040                                 // silently ignore.
1041                                 return true;
1042                         }
1043                         else if ((command == "U") || (command == "S"))
1044                         {
1045                                 this->SendError("Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
1046                                 return false;
1047                         }
1048                         else if (command == "BURST")
1049                         {
1050                                 if (params.size() && Utils->EnableTimeSync)
1051                                 {
1052                                         bool we_have_delta = (Instance->Time(false) != Instance->Time(true));
1053                                         time_t them = atoi(params[0].c_str());
1054                                         time_t delta = them - Instance->Time(false);
1055                                         if ((delta < -300) || (delta > 300))
1056                                         {
1057                                                 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));
1058                                                 SendError("Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
1059                                                 return false;
1060                                         }
1061                                         else if ((delta < -30) || (delta > 30))
1062                                         {
1063                                                 Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds. Please consider synching your clocks.", abs(delta));
1064                                         }
1065
1066                                         if (!Utils->MasterTime && !we_have_delta)
1067                                         {
1068                                                 this->Instance->SetTimeDelta(delta);
1069                                                 // Send this new timestamp to any other servers
1070                                                 Utils->DoOneToMany(Utils->TreeRoot->GetName(), "TIMESET", params);
1071                                         }
1072                                 }
1073                                 this->LinkState = CONNECTED;
1074                                 Link* lnk = Utils->FindLink(InboundServerName);
1075                                 Node = new TreeServer(this->Utils,this->Instance, InboundServerName, InboundDescription, Utils->TreeRoot, this, lnk ? lnk->Hidden : false);
1076                                 Utils->DelBurstingServer(this);
1077                                 Utils->TreeRoot->AddChild(Node);
1078                                 params.clear();
1079                                 params.push_back(InboundServerName);
1080                                 params.push_back("*");
1081                                 params.push_back("1");
1082                                 params.push_back(":"+InboundDescription);
1083                                 Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,InboundServerName);
1084                                 this->bursting = true;
1085                                 this->DoBurst(Node);
1086                         }
1087                         else if (command == "ERROR")
1088                         {
1089                                 return this->Error(params);
1090                         }
1091                         else if (command == "CAPAB")
1092                         {
1093                                 return this->Capab(params);
1094                         }
1095
1096                 break;
1097                 case LISTENER:
1098                         this->SendError("Internal error -- listening socket accepted its own descriptor!!!");
1099                         return false;
1100                 break;
1101                 case CONNECTING:
1102                         if (command == "SERVER")
1103                         {
1104                                 // another server we connected to, which was in WAIT_AUTH_1 state,
1105                                 // has just sent us their credentials. If we get this far, theyre
1106                                 // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
1107                                 // if we're happy with this, we should send our netburst which
1108                                 // kickstarts the merge.
1109                                 return this->Outbound_Reply_Server(params);
1110                         }
1111                         else if (command == "ERROR")
1112                         {
1113                                 return this->Error(params);
1114                         }
1115                         else if (command == "CAPAB")
1116                         {
1117                                 return this->Capab(params);
1118                         }
1119                 break;
1120                 case CONNECTED:
1121                         // This is the 'authenticated' state, when all passwords
1122                         // have been exchanged and anything past this point is taken
1123                         // as gospel.
1124
1125                         if (prefix != "")
1126                         {
1127                                 std::string direction = prefix;
1128                                 userrec* t = this->Instance->FindNick(prefix);
1129                                 if (t)
1130                                 {
1131                                         direction = t->server;
1132                                 }
1133                                 TreeServer* route_back_again = Utils->BestRouteTo(direction);
1134                                 if ((!route_back_again) || (route_back_again->GetSocket() != this))
1135                                 {
1136                                         if (route_back_again)
1137                                                 Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
1138                                         return true;
1139                                 }
1140                                 /* Fix by brain:
1141                                  * When there is activity on the socket, reset the ping counter so
1142                                  * that we're not wasting bandwidth pinging an active server.
1143                                  */
1144                                 route_back_again->SetNextPingTime(time(NULL) + 60);
1145                                 route_back_again->SetPingFlag();
1146                         }
1147
1148                         if (command == "SVSMODE")
1149                         {
1150                                 /* Services expects us to implement
1151                                  * SVSMODE. In inspircd its the same as
1152                                  * MODE anyway.
1153                                  */
1154                                 command = "MODE";
1155                         }
1156                         std::string target = "";
1157                         /* Yes, know, this is a mess. Its reasonably fast though as we're
1158                          * working with std::string here.
1159                          */
1160                         if ((command == "NICK") && (params.size() >= 8))
1161                         {
1162                                 return this->IntroduceClient(prefix,params);
1163                         }
1164                         else if (command == "FJOIN")
1165                         {
1166                                 return this->ForceJoin(prefix,params);
1167                         }
1168                         else if (command == "STATS")
1169                         {
1170                                 return this->Stats(prefix, params);
1171                         }
1172                         else if (command == "MOTD")
1173                         {
1174                                 return this->Motd(prefix, params);
1175                         }
1176                         else if (command == "MODULES")
1177                         {
1178                                 return this->Modules(prefix, params);
1179                         }
1180                         else if (command == "ADMIN")
1181                         {
1182                                 return this->Admin(prefix, params);
1183                         }
1184                         else if (command == "SERVER")
1185                         {
1186                                 return this->RemoteServer(prefix,params);
1187                         }
1188                         else if (command == "ERROR")
1189                         {
1190                                 return this->Error(params);
1191                         }
1192                         else if (command == "OPERTYPE")
1193                         {
1194                                 return this->OperType(prefix,params);
1195                         }
1196                         else if (command == "FMODE")
1197                         {
1198                                 return this->ForceMode(prefix,params);
1199                         }
1200                         else if (command == "KILL")
1201                         {
1202                                 return this->RemoteKill(prefix,params);
1203                         }
1204                         else if (command == "FTOPIC")
1205                         {
1206                                 return this->ForceTopic(prefix,params);
1207                         }
1208                         else if (command == "REHASH")
1209                         {
1210                                 return this->RemoteRehash(prefix,params);
1211                         }
1212                         else if (command == "METADATA")
1213                         {
1214                                 return this->MetaData(prefix,params);
1215                         }
1216                         else if (command == "REMSTATUS")
1217                         {
1218                                 return this->RemoveStatus(prefix,params);
1219                         }
1220                         else if (command == "PING")
1221                         {
1222                                 /*
1223                                  * We just got a ping from a server that's bursting.
1224                                  * This can't be right, so set them to not bursting, and
1225                                  * apply their lines.
1226                                  */
1227                                 if (this->bursting)
1228                                 {
1229                                         this->bursting = false;
1230                                         Instance->XLines->apply_lines(Utils->lines_to_apply);
1231                                         Utils->lines_to_apply = 0;
1232                                 }
1233                                 if (prefix == "")
1234                                 {
1235                                         prefix = this->GetName();
1236                                 }
1237                                 return this->LocalPing(prefix,params);
1238                         }
1239                         else if (command == "PONG")
1240                         {
1241                                 /*
1242                                  * We just got a pong from a server that's bursting.
1243                                  * This can't be right, so set them to not bursting, and
1244                                  * apply their lines.
1245                                  */
1246                                 if (this->bursting)
1247                                 {
1248                                         this->bursting = false;
1249                                         Instance->XLines->apply_lines(Utils->lines_to_apply);
1250                                         Utils->lines_to_apply = 0;
1251                                 }
1252                                 if (prefix == "")
1253                                 {
1254                                         prefix = this->GetName();
1255                                 }
1256                                 return this->LocalPong(prefix,params);
1257                         }
1258                         else if (command == "VERSION")
1259                         {
1260                                 return this->ServerVersion(prefix,params);
1261                         }
1262                         else if (command == "FHOST")
1263                         {
1264                                 return this->ChangeHost(prefix,params);
1265                         }
1266                         else if (command == "FNAME")
1267                         {
1268                                 return this->ChangeName(prefix,params);
1269                         }
1270                         else if (command == "ADDLINE")
1271                         {
1272                                 return this->AddLine(prefix,params);
1273                         }
1274                         else if (command == "SVSNICK")
1275                         {
1276                                 if (prefix == "")
1277                                 {
1278                                         prefix = this->GetName();
1279                                 }
1280                                 return this->ForceNick(prefix,params);
1281                         }
1282                         else if (command == "OPERQUIT")
1283                         {
1284                                 return this->OperQuit(prefix,params);
1285                         }
1286                         else if (command == "RSQUIT")
1287                         {
1288                                 return this->RemoteSquit(prefix, params);
1289                         }
1290                         else if (command == "IDLE")
1291                         {
1292                                 return this->Whois(prefix,params);
1293                         }
1294                         else if (command == "PUSH")
1295                         {
1296                                 return this->Push(prefix,params);
1297                         }
1298                         else if (command == "TIMESET")
1299                         {
1300                                 return this->HandleSetTime(prefix, params);
1301                         }
1302                         else if (command == "TIME")
1303                         {
1304                                 return this->Time(prefix,params);
1305                         }
1306                         else if ((command == "KICK") && (Utils->IsServer(prefix)))
1307                         {
1308                                 std::string sourceserv = this->myhost;
1309                                 if (params.size() == 3)
1310                                 {
1311                                         userrec* user = this->Instance->FindNick(params[1]);
1312                                         chanrec* chan = this->Instance->FindChan(params[0]);
1313                                         if (user && chan)
1314                                         {
1315                                                 if (!chan->ServerKickUser(user, params[2].c_str(), false))
1316                                                         /* Yikes, the channels gone! */
1317                                                         delete chan;
1318                                         }
1319                                 }
1320                                 if (this->InboundServerName != "")
1321                                 {
1322                                         sourceserv = this->InboundServerName;
1323                                 }
1324                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1325                         }
1326                         else if (command == "SVSJOIN")
1327                         {
1328                                 if (prefix == "")
1329                                 {
1330                                         prefix = this->GetName();
1331                                 }
1332                                 return this->ServiceJoin(prefix,params);
1333                         }
1334                         else if (command == "SQUIT")
1335                         {
1336                                 if (params.size() == 2)
1337                                 {
1338                                         this->Squit(Utils->FindServer(params[0]),params[1]);
1339                                 }
1340                                 return true;
1341                         }
1342                         else if (command == "OPERNOTICE")
1343                         {
1344                                 std::string sourceserv = this->myhost;
1345                                 if (this->InboundServerName != "")
1346                                         sourceserv = this->InboundServerName;
1347                                 if (params.size() >= 1)
1348                                         Instance->WriteOpers("*** From " + sourceserv + ": " + params[0]);
1349                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1350                         }
1351                         else if (command == "MODENOTICE")
1352                         {
1353                                 std::string sourceserv = this->myhost;
1354                                 if (this->InboundServerName != "")
1355                                         sourceserv = this->InboundServerName;
1356                                 if (params.size() >= 2)
1357                                 {
1358                                         Instance->WriteMode(params[0].c_str(), WM_AND, "*** From %s: %s", sourceserv.c_str(), params[1].c_str());
1359                                 }
1360                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1361                         }
1362                         else if (command == "SNONOTICE")
1363                         {
1364                                 std::string sourceserv = this->myhost;
1365                                 if (this->InboundServerName != "")
1366                                         sourceserv = this->InboundServerName;
1367                                 if (params.size() >= 2)
1368                                 {
1369                                         Instance->SNO->WriteToSnoMask(*(params[0].c_str()), "From " + sourceserv + ": "+ params[1]);
1370                                 }
1371                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1372                         }
1373                         else if (command == "ENDBURST")
1374                         {
1375                                 this->bursting = false;
1376                                 Instance->XLines->apply_lines(Utils->lines_to_apply);
1377                                 Utils->lines_to_apply = 0;
1378                                 std::string sourceserv = this->myhost;
1379                                 if (this->InboundServerName != "")
1380                                 {
1381                                         sourceserv = this->InboundServerName;
1382                                 }
1383                                 this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
1384
1385                                 Event rmode((char*)sourceserv.c_str(), (Module*)Utils->Creator, "new_server");
1386                                 rmode.Send(Instance);
1387
1388                                 return true;
1389                         }
1390                         else
1391                         {
1392                                 // not a special inter-server command.
1393                                 // Emulate the actual user doing the command,
1394                                 // this saves us having a huge ugly parser.
1395                                 userrec* who = this->Instance->FindNick(prefix);
1396                                 std::string sourceserv = this->myhost;
1397                                 if (this->InboundServerName != "")
1398                                 {
1399                                         sourceserv = this->InboundServerName;
1400                                 }
1401                                 if ((!who) && (command == "MODE"))
1402                                 {
1403                                         if (Utils->IsServer(prefix))
1404                                         {
1405                                                 const char* modelist[127];
1406                                                 for (size_t i = 0; i < params.size(); i++)
1407                                                         modelist[i] = params[i].c_str();
1408                                                 userrec* fake = new userrec(Instance);
1409                                                 fake->SetFd(FD_MAGIC_NUMBER);
1410                                                 this->Instance->SendMode(modelist, params.size(), fake);
1411
1412                                                 delete fake;
1413                                                 /* Hot potato! pass it on! */
1414                                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1415                                         }
1416                                 }
1417                                 if (who)
1418                                 {
1419                                         if ((command == "NICK") && (params.size() > 0))
1420                                         {
1421                                                 /* On nick messages, check that the nick doesnt
1422                                                  * already exist here. If it does, kill their copy,
1423                                                  * and our copy.
1424                                                  */
1425                                                 userrec* x = this->Instance->FindNick(params[0]);
1426                                                 if ((x) && (x != who))
1427                                                 {
1428                                                         std::deque<std::string> p;
1429                                                         p.push_back(params[0]);
1430                                                         p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
1431                                                         Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
1432                                                         p.clear();
1433                                                         p.push_back(prefix);
1434                                                         p.push_back("Nickname collision");
1435                                                         Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
1436                                                         userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
1437                                                         userrec* y = this->Instance->FindNick(prefix);
1438                                                         if (y)
1439                                                         {
1440                                                                 userrec::QuitUser(this->Instance,y,"Nickname collision");
1441                                                         }
1442                                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1443                                                 }
1444                                         }
1445                                         // its a user
1446                                         target = who->server;
1447                                         const char* strparams[127];
1448                                         for (unsigned int q = 0; q < params.size(); q++)
1449                                         {
1450                                                 strparams[q] = params[q].c_str();
1451                                         }
1452                                         switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
1453                                         {
1454                                                 case CMD_INVALID:
1455                                                         this->SendError("Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
1456                                                         return false;
1457                                                 break;
1458                                                 case CMD_FAILURE:
1459                                                         return true;
1460                                                 break;
1461                                                 default:
1462                                                         /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
1463                                                 break;
1464                                         }
1465                                 }
1466                                 else
1467                                 {
1468                                         // its not a user. Its either a server, or somethings screwed up.
1469                                         if (Utils->IsServer(prefix))
1470                                                 target = this->Instance->Config->ServerName;
1471                                         else
1472                                                 return true;
1473                                 }
1474                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1475
1476                         }
1477                         return true;
1478                 break;
1479         }
1480         return true;
1481 }
1482
1483 std::string TreeSocket::GetName()
1484 {
1485         std::string sourceserv = this->myhost;
1486         if (this->InboundServerName != "")
1487         {
1488                 sourceserv = this->InboundServerName;
1489         }
1490         return sourceserv;
1491 }
1492
1493 void TreeSocket::OnTimeout()
1494 {
1495         if (this->LinkState == CONNECTING)
1496         {
1497                 this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out.");
1498                 Link* MyLink = Utils->FindLink(myhost);
1499                 if (MyLink)
1500                         Utils->DoFailOver(MyLink);
1501         }
1502 }
1503
1504 void TreeSocket::OnClose()
1505 {
1506         // Connection closed.
1507         // If the connection is fully up (state CONNECTED)
1508         // then propogate a netsplit to all peers.
1509         std::string quitserver = this->myhost;
1510         if (this->InboundServerName != "")
1511         {
1512                 quitserver = this->InboundServerName;
1513         }
1514         TreeServer* s = Utils->FindServer(quitserver);
1515         if (s)
1516         {
1517                 Squit(s,"Remote host closed the connection");
1518         }
1519
1520         if (quitserver != "")
1521                 this->Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' failed.",quitserver.c_str());
1522 }
1523
1524 int TreeSocket::OnIncomingConnection(int newsock, char* ip)
1525 {
1526         /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
1527          * or discovering if this port is the server port, we don't allow connections from any
1528          * IPs for which we don't have a link block.
1529          */
1530         bool found = false;
1531
1532         found = (std::find(Utils->ValidIPs.begin(), Utils->ValidIPs.end(), ip) != Utils->ValidIPs.end());
1533         if (!found)
1534         {
1535                 for (vector<std::string>::iterator i = Utils->ValidIPs.begin(); i != Utils->ValidIPs.end(); i++)
1536                         if (irc::sockets::MatchCIDR(ip, (*i).c_str()))
1537                                 found = true;
1538
1539                 if (!found)
1540                 {
1541                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from %s denied (no link blocks with that IP address)", ip);
1542                         close(newsock);
1543                         return false;
1544                 }
1545         }
1546
1547         TreeSocket* s = new TreeSocket(this->Utils, this->Instance, newsock, ip, this->Hook);
1548         s = s; /* Whinge whinge whinge, thats all GCC ever does. */
1549         return true;
1550 }