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->WriteLine("ERROR :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->WriteLine("ERROR :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         int hops = atoi(params[2].c_str());
 847
 848         if (hops)
 849         {
 850                 this->WriteLine("ERROR :Server too far away for authentication");
 851                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
 852                 return false;
 853         }
 854         std::string description = params[3];
 855         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 856         {
 857                 if ((x->Name == servername) && ((ComparePass(this->MakePass(x->RecvPass,this->GetOurChallenge()),password)) || (x->RecvPass == password && (this->GetTheirChallenge().empty()))))
 858                 {
 859                         TreeServer* CheckDupe = Utils->FindServer(sname);
 860                         if (CheckDupe)
 861                         {
 862                                 this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
 863                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
 864                                 return false;
 865                         }
 866                         // Begin the sync here. this kickstarts the
 867                         // other side, waiting in WAIT_AUTH_2 state,
 868                         // into starting their burst, as it shows
 869                         // that we're happy.
 870                         this->LinkState = CONNECTED;
 871                         // we should add the details of this server now
 872                         // to the servers tree, as a child of the root
 873                         // node.
 874                         TreeServer* Node = new TreeServer(this->Utils,this->Instance,sname,description,Utils->TreeRoot,this,x->Hidden);
 875                         Utils->TreeRoot->AddChild(Node);
 876                         params[3] = ":" + params[3];
 877                         Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,sname);
 878                         this->bursting = true;
 879                         this->DoBurst(Node);
 880                         return true;
 881                 }
 882         }
 883         this->WriteLine("ERROR :Invalid credentials");
 884         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
 885         return false;
 886 }
 887
 888 bool TreeSocket::Inbound_Server(std::deque<std::string> &params)
 889 {
 890         if (params.size() < 4)
 891                 return false;
 892         irc::string servername = params[0].c_str();
 893         std::string sname = params[0];
 894         std::string password = params[1];
 895         int hops = atoi(params[2].c_str());
 896
 897         if (hops)
 898         {
 899                 this->WriteLine("ERROR :Server too far away for authentication");
 900                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
 901                 return false;
 902         }
 903         std::string description = params[3];
 904         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 905         {
 906                 if ((x->Name == servername) && ((ComparePass(this->MakePass(x->RecvPass,this->GetOurChallenge()),password) || x->RecvPass == password && (this->GetTheirChallenge().empty()))))
 907                 {
 908                         /* First check for instances of the server that are waiting between the inbound and outbound SERVER command */
 909                         TreeSocket* CheckDupeSocket = Utils->FindBurstingServer(sname);
 910                         if (CheckDupeSocket)
 911                         {
 912                                 /* If we find one, we abort the link to prevent a race condition */
 913                                 this->WriteLine("ERROR :Negotiation collision");
 914                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists in a negotiating state.");
 915                                 CheckDupeSocket->WriteLine("ERROR :Negotiation collision");
 916                                 Instance->SE->DelFd(CheckDupeSocket);
 917                                 CheckDupeSocket->Close();
 918                                 delete CheckDupeSocket;
 919                                 return false;
 920                         }
 921                         /* Now check for fully initialized instances of the server */
 922                         TreeServer* CheckDupe = Utils->FindServer(sname);
 923                         if (CheckDupe)
 924                         {
 925                                 this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
 926                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
 927                                 return false;
 928                         }
 929                         this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
 930                         if (this->Hook)
 931                         {
 932                                 std::string name = InspSocketNameRequest((Module*)Utils->Creator, this->Hook).Send();
 933                                 this->Instance->SNO->WriteToSnoMask('l',"Connection from \2"+sname+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] using transport \2"+name+"\2");
 934                         }
 935
 936                         Utils->AddBurstingServer(sname,this);
 937
 938                         this->InboundServerName = sname;
 939                         this->InboundDescription = description;
 940                         // this is good. Send our details: Our server name and description and hopcount of 0,
 941                         // along with the sendpass from this block.
 942                         this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+this->MakePass(x->SendPass, this->GetTheirChallenge())+" 0 :"+this->Instance->Config->ServerDesc);
 943                         // move to the next state, we are now waiting for THEM.
 944                         this->LinkState = WAIT_AUTH_2;
 945                         return true;
 946                 }
 947         }
 948         this->WriteLine("ERROR :Invalid credentials");
 949         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
 950         return false;
 951 }
 952
 953 void TreeSocket::Split(const std::string &line, std::deque<std::string> &n)
 954 {
 955         n.clear();
 956         irc::tokenstream tokens(line);
 957         std::string param;
 958         while (tokens.GetToken(param))
 959                 n.push_back(param);
 960         return;
 961 }
 962
 963 bool TreeSocket::ProcessLine(std::string &line)
 964 {
 965         std::deque<std::string> params;
 966         irc::string command;
 967         std::string prefix;
 968
 969         line = line.substr(0, line.find_first_of("\r\n"));
 970
 971         if (line.empty())
 972                 return true;
 973
 974         Instance->Log(DEBUG, "<- %s", line.c_str());
 975
 976         this->Split(line.c_str(),params);
 977
 978         if ((params[0][0] == ':') && (params.size() > 1))
 979         {
 980                 prefix = params[0].substr(1);
 981                 params.pop_front();
 982         }
 983         command = params[0].c_str();
 984         params.pop_front();
 985         switch (this->LinkState)
 986         {
 987                 TreeServer* Node;
 988
 989                 case WAIT_AUTH_1:
 990                         // Waiting for SERVER command from remote server. Server initiating
 991                         // the connection sends the first SERVER command, listening server
 992                         // replies with theirs if its happy, then if the initiator is happy,
 993                         // it starts to send its net sync, which starts the merge, otherwise
 994                         // it sends an ERROR.
 995                         if (command == "PASS")
 996                         {
 997                                 /* Silently ignored */
 998                         }
 999                         else if (command == "SERVER")
1000                         {
1001                                 return this->Inbound_Server(params);
1002                         }
1003                         else if (command == "ERROR")
1004                         {
1005                                 return this->Error(params);
1006                         }
1007                         else if (command == "USER")
1008                         {
1009                                 this->WriteLine("ERROR :Client connections to this port are prohibited.");
1010                                 return false;
1011                         }
1012                         else if (command == "CAPAB")
1013                         {
1014                                 return this->Capab(params);
1015                         }
1016                         else if ((command == "U") || (command == "S"))
1017                         {
1018                                 this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
1019                                 return false;
1020                         }
1021                         else
1022                         {
1023                                 std::string error("ERROR :Invalid command in negotiation phase: ");
1024                                 error.append(command.c_str());
1025                                 this->WriteLine(error);
1026                                 return false;
1027                         }
1028                 break;
1029                 case WAIT_AUTH_2:
1030                         // Waiting for start of other side's netmerge to say they liked our
1031                         // password.
1032                         if (command == "SERVER")
1033                         {
1034                                 // cant do this, they sent it to us in the WAIT_AUTH_1 state!
1035                                 // silently ignore.
1036                                 return true;
1037                         }
1038                         else if ((command == "U") || (command == "S"))
1039                         {
1040                                 this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
1041                                 return false;
1042                         }
1043                         else if (command == "BURST")
1044                         {
1045                                 if (params.size() && Utils->EnableTimeSync)
1046                                 {
1047                                         bool we_have_delta = (Instance->Time(false) != Instance->Time(true));
1048                                         time_t them = atoi(params[0].c_str());
1049                                         time_t delta = them - Instance->Time(false);
1050                                         if ((delta < -300) || (delta > 300))
1051                                         {
1052                                                 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));
1053                                                 WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
1054                                                 return false;
1055                                         }
1056                                         else if ((delta < -30) || (delta > 30))
1057                                         {
1058                                                 Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds. Please consider synching your clocks.", abs(delta));
1059                                         }
1060
1061                                         if (!Utils->MasterTime && !we_have_delta)
1062                                         {
1063                                                 this->Instance->SetTimeDelta(delta);
1064                                                 // Send this new timestamp to any other servers
1065                                                 Utils->DoOneToMany(Utils->TreeRoot->GetName(), "TIMESET", params);
1066                                         }
1067                                 }
1068                                 this->LinkState = CONNECTED;
1069                                 Link* lnk = Utils->FindLink(InboundServerName);
1070                                 Node = new TreeServer(this->Utils,this->Instance, InboundServerName, InboundDescription, Utils->TreeRoot, this, lnk ? lnk->Hidden : false);
1071                                 Utils->DelBurstingServer(this);
1072                                 Utils->TreeRoot->AddChild(Node);
1073                                 params.clear();
1074                                 params.push_back(InboundServerName);
1075                                 params.push_back("*");
1076                                 params.push_back("1");
1077                                 params.push_back(":"+InboundDescription);
1078                                 Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,InboundServerName);
1079                                 this->bursting = true;
1080                                 this->DoBurst(Node);
1081                         }
1082                         else if (command == "ERROR")
1083                         {
1084                                 return this->Error(params);
1085                         }
1086                         else if (command == "CAPAB")
1087                         {
1088                                 return this->Capab(params);
1089                         }
1090
1091                 break;
1092                 case LISTENER:
1093                         this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
1094                         return false;
1095                 break;
1096                 case CONNECTING:
1097                         if (command == "SERVER")
1098                         {
1099                                 // another server we connected to, which was in WAIT_AUTH_1 state,
1100                                 // has just sent us their credentials. If we get this far, theyre
1101                                 // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
1102                                 // if we're happy with this, we should send our netburst which
1103                                 // kickstarts the merge.
1104                                 return this->Outbound_Reply_Server(params);
1105                         }
1106                         else if (command == "ERROR")
1107                         {
1108                                 return this->Error(params);
1109                         }
1110                         else if (command == "CAPAB")
1111                         {
1112                                 return this->Capab(params);
1113                         }
1114                 break;
1115                 case CONNECTED:
1116                         // This is the 'authenticated' state, when all passwords
1117                         // have been exchanged and anything past this point is taken
1118                         // as gospel.
1119
1120                         if (prefix != "")
1121                         {
1122                                 std::string direction = prefix;
1123                                 userrec* t = this->Instance->FindNick(prefix);
1124                                 if (t)
1125                                 {
1126                                         direction = t->server;
1127                                 }
1128                                 TreeServer* route_back_again = Utils->BestRouteTo(direction);
1129                                 if ((!route_back_again) || (route_back_again->GetSocket() != this))
1130                                 {
1131                                         if (route_back_again)
1132                                                 Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
1133                                         return true;
1134                                 }
1135                                 /* Fix by brain:
1136                                  * When there is activity on the socket, reset the ping counter so
1137                                  * that we're not wasting bandwidth pinging an active server.
1138                                  */
1139                                 route_back_again->SetNextPingTime(time(NULL) + 60);
1140                                 route_back_again->SetPingFlag();
1141                         }
1142
1143                         if (command == "SVSMODE")
1144                         {
1145                                 /* Services expects us to implement
1146                                  * SVSMODE. In inspircd its the same as
1147                                  * MODE anyway.
1148                                  */
1149                                 command = "MODE";
1150                         }
1151                         std::string target = "";
1152                         /* Yes, know, this is a mess. Its reasonably fast though as we're
1153                          * working with std::string here.
1154                          */
1155                         if ((command == "NICK") && (params.size() >= 8))
1156                         {
1157                                 return this->IntroduceClient(prefix,params);
1158                         }
1159                         else if (command == "FJOIN")
1160                         {
1161                                 return this->ForceJoin(prefix,params);
1162                         }
1163                         else if (command == "STATS")
1164                         {
1165                                 return this->Stats(prefix, params);
1166                         }
1167                         else if (command == "MOTD")
1168                         {
1169                                 return this->Motd(prefix, params);
1170                         }
1171                         else if (command == "MODULES")
1172                         {
1173                                 return this->Modules(prefix, params);
1174                         }
1175                         else if (command == "ADMIN")
1176                         {
1177                                 return this->Admin(prefix, params);
1178                         }
1179                         else if (command == "SERVER")
1180                         {
1181                                 return this->RemoteServer(prefix,params);
1182                         }
1183                         else if (command == "ERROR")
1184                         {
1185                                 return this->Error(params);
1186                         }
1187                         else if (command == "OPERTYPE")
1188                         {
1189                                 return this->OperType(prefix,params);
1190                         }
1191                         else if (command == "FMODE")
1192                         {
1193                                 return this->ForceMode(prefix,params);
1194                         }
1195                         else if (command == "KILL")
1196                         {
1197                                 return this->RemoteKill(prefix,params);
1198                         }
1199                         else if (command == "FTOPIC")
1200                         {
1201                                 return this->ForceTopic(prefix,params);
1202                         }
1203                         else if (command == "REHASH")
1204                         {
1205                                 return this->RemoteRehash(prefix,params);
1206                         }
1207                         else if (command == "METADATA")
1208                         {
1209                                 return this->MetaData(prefix,params);
1210                         }
1211                         else if (command == "REMSTATUS")
1212                         {
1213                                 return this->RemoveStatus(prefix,params);
1214                         }
1215                         else if (command == "PING")
1216                         {
1217                                 /*
1218                                  * We just got a ping from a server that's bursting.
1219                                  * This can't be right, so set them to not bursting, and
1220                                  * apply their lines.
1221                                  */
1222                                 if (this->bursting)
1223                                 {
1224                                         this->bursting = false;
1225                                         Instance->XLines->apply_lines(Utils->lines_to_apply);
1226                                         Utils->lines_to_apply = 0;
1227                                 }
1228                                 if (prefix == "")
1229                                 {
1230                                         prefix = this->GetName();
1231                                 }
1232                                 return this->LocalPing(prefix,params);
1233                         }
1234                         else if (command == "PONG")
1235                         {
1236                                 /*
1237                                  * We just got a pong from a server that's bursting.
1238                                  * This can't be right, so set them to not bursting, and
1239                                  * apply their lines.
1240                                  */
1241                                 if (this->bursting)
1242                                 {
1243                                         this->bursting = false;
1244                                         Instance->XLines->apply_lines(Utils->lines_to_apply);
1245                                         Utils->lines_to_apply = 0;
1246                                 }
1247                                 if (prefix == "")
1248                                 {
1249                                         prefix = this->GetName();
1250                                 }
1251                                 return this->LocalPong(prefix,params);
1252                         }
1253                         else if (command == "VERSION")
1254                         {
1255                                 return this->ServerVersion(prefix,params);
1256                         }
1257                         else if (command == "FHOST")
1258                         {
1259                                 return this->ChangeHost(prefix,params);
1260                         }
1261                         else if (command == "FNAME")
1262                         {
1263                                 return this->ChangeName(prefix,params);
1264                         }
1265                         else if (command == "ADDLINE")
1266                         {
1267                                 return this->AddLine(prefix,params);
1268                         }
1269                         else if (command == "SVSNICK")
1270                         {
1271                                 if (prefix == "")
1272                                 {
1273                                         prefix = this->GetName();
1274                                 }
1275                                 return this->ForceNick(prefix,params);
1276                         }
1277                         else if (command == "OPERQUIT")
1278                         {
1279                                 return this->OperQuit(prefix,params);
1280                         }
1281                         else if (command == "RSQUIT")
1282                         {
1283                                 return this->RemoteSquit(prefix, params);
1284                         }
1285                         else if (command == "IDLE")
1286                         {
1287                                 return this->Whois(prefix,params);
1288                         }
1289                         else if (command == "PUSH")
1290                         {
1291                                 return this->Push(prefix,params);
1292                         }
1293                         else if (command == "TIMESET")
1294                         {
1295                                 return this->HandleSetTime(prefix, params);
1296                         }
1297                         else if (command == "TIME")
1298                         {
1299                                 return this->Time(prefix,params);
1300                         }
1301                         else if ((command == "KICK") && (Utils->IsServer(prefix)))
1302                         {
1303                                 std::string sourceserv = this->myhost;
1304                                 if (params.size() == 3)
1305                                 {
1306                                         userrec* user = this->Instance->FindNick(params[1]);
1307                                         chanrec* chan = this->Instance->FindChan(params[0]);
1308                                         if (user && chan)
1309                                         {
1310                                                 if (!chan->ServerKickUser(user, params[2].c_str(), false))
1311                                                         /* Yikes, the channels gone! */
1312                                                         delete chan;
1313                                         }
1314                                 }
1315                                 if (this->InboundServerName != "")
1316                                 {
1317                                         sourceserv = this->InboundServerName;
1318                                 }
1319                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1320                         }
1321                         else if (command == "SVSJOIN")
1322                         {
1323                                 if (prefix == "")
1324                                 {
1325                                         prefix = this->GetName();
1326                                 }
1327                                 return this->ServiceJoin(prefix,params);
1328                         }
1329                         else if (command == "SQUIT")
1330                         {
1331                                 if (params.size() == 2)
1332                                 {
1333                                         this->Squit(Utils->FindServer(params[0]),params[1]);
1334                                 }
1335                                 return true;
1336                         }
1337                         else if (command == "OPERNOTICE")
1338                         {
1339                                 std::string sourceserv = this->myhost;
1340                                 if (this->InboundServerName != "")
1341                                         sourceserv = this->InboundServerName;
1342                                 if (params.size() >= 1)
1343                                         Instance->WriteOpers("*** From " + sourceserv + ": " + params[0]);
1344                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1345                         }
1346                         else if (command == "MODENOTICE")
1347                         {
1348                                 std::string sourceserv = this->myhost;
1349                                 if (this->InboundServerName != "")
1350                                         sourceserv = this->InboundServerName;
1351                                 if (params.size() >= 2)
1352                                 {
1353                                         Instance->WriteMode(params[0].c_str(), WM_AND, "*** From %s: %s", sourceserv.c_str(), params[1].c_str());
1354                                 }
1355                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1356                         }
1357                         else if (command == "SNONOTICE")
1358                         {
1359                                 std::string sourceserv = this->myhost;
1360                                 if (this->InboundServerName != "")
1361                                         sourceserv = this->InboundServerName;
1362                                 if (params.size() >= 2)
1363                                 {
1364                                         Instance->SNO->WriteToSnoMask(*(params[0].c_str()), "From " + sourceserv + ": "+ params[1]);
1365                                 }
1366                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1367                         }
1368                         else if (command == "ENDBURST")
1369                         {
1370                                 this->bursting = false;
1371                                 Instance->XLines->apply_lines(Utils->lines_to_apply);
1372                                 Utils->lines_to_apply = 0;
1373                                 std::string sourceserv = this->myhost;
1374                                 if (this->InboundServerName != "")
1375                                 {
1376                                         sourceserv = this->InboundServerName;
1377                                 }
1378                                 this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
1379
1380                                 Event rmode((char*)sourceserv.c_str(), (Module*)Utils->Creator, "new_server");
1381                                 rmode.Send(Instance);
1382
1383                                 return true;
1384                         }
1385                         else
1386                         {
1387                                 // not a special inter-server command.
1388                                 // Emulate the actual user doing the command,
1389                                 // this saves us having a huge ugly parser.
1390                                 userrec* who = this->Instance->FindNick(prefix);
1391                                 std::string sourceserv = this->myhost;
1392                                 if (this->InboundServerName != "")
1393                                 {
1394                                         sourceserv = this->InboundServerName;
1395                                 }
1396                                 if ((!who) && (command == "MODE"))
1397                                 {
1398                                         if (Utils->IsServer(prefix))
1399                                         {
1400                                                 const char* modelist[127];
1401                                                 for (size_t i = 0; i < params.size(); i++)
1402                                                         modelist[i] = params[i].c_str();
1403                                                 userrec* fake = new userrec(Instance);
1404                                                 fake->SetFd(FD_MAGIC_NUMBER);
1405                                                 this->Instance->SendMode(modelist, params.size(), fake);
1406
1407                                                 delete fake;
1408                                                 /* Hot potato! pass it on! */
1409                                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1410                                         }
1411                                 }
1412                                 if (who)
1413                                 {
1414                                         if ((command == "NICK") && (params.size() > 0))
1415                                         {
1416                                                 /* On nick messages, check that the nick doesnt
1417                                                  * already exist here. If it does, kill their copy,
1418                                                  * and our copy.
1419                                                  */
1420                                                 userrec* x = this->Instance->FindNick(params[0]);
1421                                                 if ((x) && (x != who))
1422                                                 {
1423                                                         std::deque<std::string> p;
1424                                                         p.push_back(params[0]);
1425                                                         p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
1426                                                         Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
1427                                                         p.clear();
1428                                                         p.push_back(prefix);
1429                                                         p.push_back("Nickname collision");
1430                                                         Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
1431                                                         userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
1432                                                         userrec* y = this->Instance->FindNick(prefix);
1433                                                         if (y)
1434                                                         {
1435                                                                 userrec::QuitUser(this->Instance,y,"Nickname collision");
1436                                                         }
1437                                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1438                                                 }
1439                                         }
1440                                         // its a user
1441                                         target = who->server;
1442                                         const char* strparams[127];
1443                                         for (unsigned int q = 0; q < params.size(); q++)
1444                                         {
1445                                                 strparams[q] = params[q].c_str();
1446                                         }
1447                                         switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
1448                                         {
1449                                                 case CMD_INVALID:
1450                                                         this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
1451                                                         return false;
1452                                                 break;
1453                                                 case CMD_FAILURE:
1454                                                         return true;
1455                                                 break;
1456                                                 default:
1457                                                         /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
1458                                                 break;
1459                                         }
1460                                 }
1461                                 else
1462                                 {
1463                                         // its not a user. Its either a server, or somethings screwed up.
1464                                         if (Utils->IsServer(prefix))
1465                                                 target = this->Instance->Config->ServerName;
1466                                         else
1467                                                 return true;
1468                                 }
1469                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1470
1471                         }
1472                         return true;
1473                 break;
1474         }
1475         return true;
1476 }
1477
1478 std::string TreeSocket::GetName()
1479 {
1480         std::string sourceserv = this->myhost;
1481         if (this->InboundServerName != "")
1482         {
1483                 sourceserv = this->InboundServerName;
1484         }
1485         return sourceserv;
1486 }
1487
1488 void TreeSocket::OnTimeout()
1489 {
1490         if (this->LinkState == CONNECTING)
1491         {
1492                 this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out.");
1493                 Link* MyLink = Utils->FindLink(myhost);
1494                 if (MyLink)
1495                         Utils->DoFailOver(MyLink);
1496         }
1497 }
1498
1499 void TreeSocket::OnClose()
1500 {
1501         // Connection closed.
1502         // If the connection is fully up (state CONNECTED)
1503         // then propogate a netsplit to all peers.
1504         std::string quitserver = this->myhost;
1505         if (this->InboundServerName != "")
1506         {
1507                 quitserver = this->InboundServerName;
1508         }
1509         TreeServer* s = Utils->FindServer(quitserver);
1510         if (s)
1511         {
1512                 Squit(s,"Remote host closed the connection");
1513         }
1514
1515         if (quitserver != "")
1516                 this->Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' failed.",quitserver.c_str());
1517 }
1518
1519 int TreeSocket::OnIncomingConnection(int newsock, char* ip)
1520 {
1521         /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
1522          * or discovering if this port is the server port, we don't allow connections from any
1523          * IPs for which we don't have a link block.
1524          */
1525         bool found = false;
1526
1527         found = (std::find(Utils->ValidIPs.begin(), Utils->ValidIPs.end(), ip) != Utils->ValidIPs.end());
1528         if (!found)
1529         {
1530                 for (vector<std::string>::iterator i = Utils->ValidIPs.begin(); i != Utils->ValidIPs.end(); i++)
1531                         if (irc::sockets::MatchCIDR(ip, (*i).c_str()))
1532                                 found = true;
1533
1534                 if (!found)
1535                 {
1536                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from %s denied (no link blocks with that IP address)", ip);
1537                         close(newsock);
1538                         return false;
1539                 }
1540         }
1541
1542         TreeSocket* s = new TreeSocket(this->Utils, this->Instance, newsock, ip, this->Hook);
1543         s = s; /* Whinge whinge whinge, thats all GCC ever does. */
1544         return true;
1545 }