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 "inspircd.h"
  15 #include "commands/cmd_whois.h"
  16 #include "commands/cmd_stats.h"
  17 #include "socket.h"
  18 #include "wildcard.h"
  19 #include "xline.h"
  20 #include "transport.h"
  21 #include "socketengine.h"
  22
  23 #include "m_spanningtree/main.h"
  24 #include "m_spanningtree/utils.h"
  25 #include "m_spanningtree/treeserver.h"
  26 #include "m_spanningtree/link.h"
  27 #include "m_spanningtree/treesocket.h"
  28 #include "m_spanningtree/resolvers.h"
  29 #include "m_spanningtree/handshaketimer.h"
  30
  31 /* $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 */
  32
  33 static std::map<std::string, std::string> warned;       /* Server names that have had protocol violation warnings displayed for them */
  34
  35 int TreeSocket::WriteLine(std::string line)
  36 {
  37         Instance->Log(DEBUG, "S[%d] O %s", this->GetFd(), line.c_str());
  38         line.append("\r\n");
  39         return this->Write(line);
  40 }
  41
  42
  43 /* Handle ERROR command */
  44 bool TreeSocket::Error(std::deque<std::string> &params)
  45 {
  46         if (params.size() < 1)
  47                 return false;
  48         this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(!InboundServerName.empty() ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
  49         /* we will return false to cause the socket to close. */
  50         return false;
  51 }
  52
  53 bool TreeSocket::Modules(const std::string &prefix, std::deque<std::string> &params)
  54 {
  55         if (params.empty())
  56                 return true;
  57
  58         if (!this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
  59         {
  60                 /* Pass it on, not for us */
  61                 Utils->DoOneToOne(prefix, "MODULES", params, params[0]);
  62                 return true;
  63         }
  64
  65         char strbuf[MAXBUF];
  66         std::deque<std::string> par;
  67         par.push_back(prefix);
  68         par.push_back("");
  69
  70         User* source = this->Instance->FindNick(prefix);
  71         if (!source)
  72                 return true;
  73
  74         for (unsigned int i = 0; i < Instance->Config->module_names.size(); i++)
  75         {
  76                 Version V = Instance->Modules->modules[i]->GetVersion();
  77                 char modulename[MAXBUF];
  78                 char flagstate[MAXBUF];
  79                 *flagstate = 0;
  80                 if (V.Flags & VF_STATIC)
  81                         strlcat(flagstate,", static",MAXBUF);
  82                 if (V.Flags & VF_VENDOR)
  83                         strlcat(flagstate,", vendor",MAXBUF);
  84                 if (V.Flags & VF_COMMON)
  85                         strlcat(flagstate,", common",MAXBUF);
  86                 if (V.Flags & VF_SERVICEPROVIDER)
  87                         strlcat(flagstate,", service provider",MAXBUF);
  88                 if (!flagstate[0])
  89                         strcpy(flagstate,"  <no flags>");
  90                 strlcpy(modulename,Instance->Config->module_names[i].c_str(),256);
  91                 if (*source->oper)
  92                 {
  93                         snprintf(strbuf, MAXBUF, "::%s 900 %s :0x%08lx %d.%d.%d.%d %s (%s)",Instance->Config->ServerName,source->nick,(long unsigned int)Instance->Modules->modules[i],V.Major,V.Minor,V.Revision,V.Build,ServerConfig::CleanFilename(modulename),flagstate+2);
  94                 }
  95                 else
  96                 {
  97                         snprintf(strbuf, MAXBUF, "::%s 900 %s :%s",Instance->Config->ServerName,source->nick,ServerConfig::CleanFilename(modulename));
  98                 }
  99                 par[1] = strbuf;
 100                 Utils->DoOneToOne(Instance->Config->GetSID(), "PUSH", par, source->server);
 101         }
 102         snprintf(strbuf, MAXBUF, "::%s 901 %s :End of MODULES list", Instance->Config->ServerName, source->nick);
 103         par[1] = strbuf;
 104         Utils->DoOneToOne(Instance->Config->GetSID(), "PUSH", par, source->server);
 105         return true;
 106 }
 107
 108 /** remote MOTD. leet, huh? */
 109 bool TreeSocket::Motd(const std::string &prefix, std::deque<std::string> &params)
 110 {
 111         if (params.size() > 0)
 112         {
 113                 if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
 114                 {
 115                         /* It's for our server */
 116                         string_list results;
 117                         User* source = this->Instance->FindNick(prefix);
 118
 119                         if (source)
 120                         {
 121                                 std::deque<std::string> par;
 122                                 par.push_back(prefix);
 123                                 par.push_back("");
 124
 125                                 if (!Instance->Config->MOTD.size())
 126                                 {
 127                                         par[1] = std::string("::")+Instance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
 128                                         Utils->DoOneToOne(this->Instance->Config->GetSID(), "PUSH",par, source->server);
 129                                         return true;
 130                                 }
 131
 132                                 par[1] = std::string("::")+Instance->Config->ServerName+" 375 "+source->nick+" :"+Instance->Config->ServerName+" message of the day";
 133                                 Utils->DoOneToOne(this->Instance->Config->GetSID(), "PUSH",par, source->server);
 134
 135                                 for (unsigned int i = 0; i < Instance->Config->MOTD.size(); i++)
 136                                 {
 137                                         par[1] = std::string("::")+Instance->Config->ServerName+" 372 "+source->nick+" :- "+Instance->Config->MOTD[i];
 138                                         Utils->DoOneToOne(this->Instance->Config->GetSID(), "PUSH",par, source->server);
 139                                 }
 140
 141                                 par[1] = std::string("::")+Instance->Config->ServerName+" 376 "+source->nick+" :End of message of the day.";
 142                                 Utils->DoOneToOne(this->Instance->Config->GetSID(), "PUSH",par, source->server);
 143                         }
 144                 }
 145                 else
 146                 {
 147                         /* Pass it on */
 148                         User* source = this->Instance->FindNick(prefix);
 149                         if (source)
 150                                 Utils->DoOneToOne(prefix, "MOTD", params, params[0]);
 151                 }
 152         }
 153         return true;
 154 }
 155
 156 /** remote ADMIN. leet, huh? */
 157 bool TreeSocket::Admin(const std::string &prefix, std::deque<std::string> &params)
 158 {
 159         if (params.size() > 0)
 160         {
 161                 if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
 162                 {
 163                         /* It's for our server */
 164                         string_list results;
 165                         User* source = this->Instance->FindNick(prefix);
 166                         if (source)
 167                         {
 168                                 std::deque<std::string> par;
 169                                 par.push_back(prefix);
 170                                 par.push_back("");
 171                                 par[1] = std::string("::")+Instance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+Instance->Config->ServerName;
 172                                 Utils->DoOneToOne(this->Instance->Config->GetSID(), "PUSH",par, source->server);
 173                                 par[1] = std::string("::")+Instance->Config->ServerName+" 257 "+source->nick+" :Name     - "+Instance->Config->AdminName;
 174                                 Utils->DoOneToOne(this->Instance->Config->GetSID(), "PUSH",par, source->server);
 175                                 par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+Instance->Config->AdminNick;
 176                                 Utils->DoOneToOne(this->Instance->Config->GetSID(), "PUSH",par, source->server);
 177                                 par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+Instance->Config->AdminEmail;
 178                                 Utils->DoOneToOne(this->Instance->Config->GetSID(), "PUSH",par, source->server);
 179                         }
 180                 }
 181                 else
 182                 {
 183                         /* Pass it on */
 184                         User* source = this->Instance->FindNick(prefix);
 185                         if (source)
 186                                 Utils->DoOneToOne(prefix, "ADMIN", params, params[0]);
 187                 }
 188         }
 189         return true;
 190 }
 191
 192 bool TreeSocket::Stats(const std::string &prefix, std::deque<std::string> &params)
 193 {
 194         /* Get the reply to a STATS query if it matches this servername,
 195          * and send it back as a load of PUSH queries
 196          */
 197         if (params.size() > 1)
 198         {
 199                 if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
 200                 {
 201                         /* It's for our server */
 202                         string_list results;
 203                         User* source = this->Instance->FindNick(prefix);
 204                         if (source)
 205                         {
 206                                 std::deque<std::string> par;
 207                                 par.push_back(prefix);
 208                                 par.push_back("");
 209                                 DoStats(this->Instance, *(params[0].c_str()), source, results);
 210                                 for (size_t i = 0; i < results.size(); i++)
 211                                 {
 212                                         par[1] = "::" + results[i];
 213                                         Utils->DoOneToOne(this->Instance->Config->GetSID(), "PUSH",par, source->server);
 214                                 }
 215                         }
 216                 }
 217                 else
 218                 {
 219                         /* Pass it on */
 220                         User* source = this->Instance->FindNick(prefix);
 221                         if (source)
 222                                 Utils->DoOneToOne(source->uuid, "STATS", params, params[1]);
 223                 }
 224         }
 225         return true;
 226 }
 227
 228
 229 /** Because the core won't let users or even SERVERS set +o,
 230  * we use the OPERTYPE command to do this.
 231  */
 232 bool TreeSocket::OperType(const std::string &prefix, std::deque<std::string> &params)
 233 {
 234         if (params.size() != 1)
 235                 return true;
 236         std::string opertype = params[0];
 237         User* u = this->Instance->FindNick(prefix);
 238         if (u)
 239         {
 240                 if (!u->IsModeSet('o'))
 241                         this->Instance->all_opers.push_back(u);
 242                 u->modes[UM_OPERATOR] = 1;
 243                 strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
 244                 Utils->DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
 245
 246                 TreeServer* remoteserver = Utils->FindServer(u->server);
 247                 bool dosend = true;
 248
 249                 if (this->Utils->quiet_bursts)
 250                 {
 251                         /*
 252                          * If quiet bursts are enabled, and server is bursting or silent uline (i.e. services),
 253                          * then do nothing. -- w00t
 254                          */
 255                         if (
 256                                 this->bursting ||
 257                                 Utils->FindRemoteBurstServer(remoteserver) ||
 258                                 this->Instance->SilentULine(this->Instance->FindServerNamePtr(u->server))
 259                            )
 260                         {
 261                                 dosend = false;
 262                         }
 263                 }
 264
 265                 if (dosend)
 266                         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()));
 267         }
 268         return true;
 269 }
 270
 271 /** Because Andy insists that services-compatible servers must
 272  * implement SVSNICK and SVSJOIN, that's exactly what we do :p
 273  */
 274 bool TreeSocket::ForceNick(const std::string &prefix, std::deque<std::string> &params)
 275 {
 276         if (params.size() < 3)
 277                 return true;
 278
 279         User* u = this->Instance->FindNick(params[0]);
 280
 281         if (u)
 282         {
 283                 Utils->DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
 284
 285                 if (IS_LOCAL(u))
 286                 {
 287                         std::deque<std::string> par;
 288                         par.push_back(params[1]);
 289
 290                         if (!u->ForceNickChange(params[1].c_str()))
 291                         {
 292                                 /* buh. UID them */
 293                                 if (!u->ForceNickChange(u->uuid))
 294                                 {
 295                                         User::QuitUser(this->Instance, u, "Nickname collision");
 296                                         return true;
 297                                 }
 298                         }
 299
 300                         u->age = atoi(params[2].c_str());
 301                 }
 302         }
 303
 304         return true;
 305 }
 306
 307 bool TreeSocket::OperQuit(const std::string &prefix, std::deque<std::string> &params)
 308 {
 309         if (params.size() < 1)
 310                 return true;
 311
 312         User* u = this->Instance->FindNick(prefix);
 313
 314         if (u)
 315         {
 316                 u->SetOperQuit(params[0]);
 317                 params[0] = ":" + params[0];
 318                 Utils->DoOneToAllButSender(prefix,"OPERQUIT",params,prefix);
 319         }
 320         return true;
 321 }
 322
 323 bool TreeSocket::ServiceJoin(const std::string &prefix, std::deque<std::string> &params)
 324 {
 325         if (params.size() < 2)
 326                 return true;
 327
 328         if (!this->Instance->IsChannel(params[1].c_str()))
 329                 return true;
 330
 331         User* u = this->Instance->FindNick(params[0]);
 332
 333         if (u)
 334         {
 335                 /* only join if it's local, otherwise just pass it on! */
 336                 if (IS_LOCAL(u))
 337                         Channel::JoinUser(this->Instance, u, params[1].c_str(), false, "", Instance->Time());
 338                 Utils->DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
 339         }
 340         return true;
 341 }
 342
 343 bool TreeSocket::ServicePart(const std::string &prefix, std::deque<std::string> &params)
 344 {
 345         if (params.size() < 2)
 346                 return true;
 347
 348         if (!this->Instance->IsChannel(params[1].c_str()))
 349                 return true;
 350
 351         User* u = this->Instance->FindNick(params[0]);
 352         Channel* c = this->Instance->FindChan(params[1]);
 353
 354         if (u)
 355         {
 356                 /* only part if it's local, otherwise just pass it on! */
 357                 if (IS_LOCAL(u))
 358                         if (!c->PartUser(u, "Services forced part"))
 359                                 delete c;
 360                 Utils->DoOneToAllButSender(prefix,"SVSPART",params,prefix);
 361         }
 362
 363         return true;
 364 }
 365
 366 bool TreeSocket::RemoteRehash(const std::string &prefix, std::deque<std::string> &params)
 367 {
 368         if (params.size() < 1)
 369                 return false;
 370
 371         std::string servermask = params[0];
 372
 373         if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
 374         {
 375                 this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated by \002"+prefix+"\002.");
 376                 this->Instance->RehashServer();
 377                 Utils->ReadConfiguration(false);
 378                 InitializeDisabledCommands(Instance->Config->DisabledCommands, Instance);
 379         }
 380         Utils->DoOneToAllButSender(prefix,"REHASH",params,prefix);
 381         return true;
 382 }
 383
 384 bool TreeSocket::RemoteKill(const std::string &prefix, std::deque<std::string> &params)
 385 {
 386         if (params.size() != 2)
 387                 return true;
 388
 389         User* who = this->Instance->FindNick(params[0]);
 390
 391         if (who)
 392         {
 393                 /* Prepend kill source, if we don't have one */
 394                 if (*(params[1].c_str()) != '[')
 395                 {
 396                         params[1] = "[" + prefix + "] Killed (" + params[1] +")";
 397                 }
 398                 std::string reason = params[1];
 399                 params[1] = ":" + params[1];
 400                 Utils->DoOneToAllButSender(prefix,"KILL",params,prefix);
 401                 // NOTE: This is safe with kill hiding on, as RemoteKill is only reached if we have a server prefix.
 402                 // in short this is not executed for USERS.
 403                 who->Write(":%s KILL %s :%s (%s)", prefix.c_str(), who->nick, prefix.c_str(), reason.c_str());
 404                 User::QuitUser(this->Instance,who,reason);
 405         }
 406         return true;
 407 }
 408
 409 bool TreeSocket::LocalPong(const std::string &prefix, std::deque<std::string> &params)
 410 {
 411         if (params.size() < 1)
 412                 return true;
 413
 414         if (params.size() == 1)
 415         {
 416                 TreeServer* ServerSource = Utils->FindServer(prefix);
 417                 if (ServerSource)
 418                 {
 419                         ServerSource->SetPingFlag();
 420                         timeval t;
 421                         gettimeofday(&t, NULL);
 422                         long ts = (t.tv_sec * 1000) + (t.tv_usec / 1000);
 423                         ServerSource->rtt = ts - ServerSource->LastPingMsec;
 424                 }
 425         }
 426         else
 427         {
 428                 std::string forwardto = params[1];
 429                 if (forwardto == Instance->Config->GetSID() || forwardto == Instance->Config->ServerName)
 430                 {
 431                         /*
 432                          * this is a PONG for us
 433                          * if the prefix is a user, check theyre local, and if they are,
 434                          * dump the PONG reply back to their fd. If its a server, do nowt.
 435                          * Services might want to send these s->s, but we dont need to yet.
 436                          */
 437                         User* u = this->Instance->FindNick(prefix);
 438                         if (u)
 439                         {
 440                                 u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
 441                         }
 442                 }
 443                 else
 444                 {
 445                         // not for us, pass it on :)
 446                         Utils->DoOneToOne(prefix,"PONG",params,forwardto);
 447                 }
 448         }
 449
 450         return true;
 451 }
 452
 453 bool TreeSocket::MetaData(const std::string &prefix, std::deque<std::string> &params)
 454 {
 455         if (params.size() < 2)
 456                 return true;
 457         else if (params.size() < 3)
 458                 params.push_back("");
 459         TreeServer* ServerSource = Utils->FindServer(prefix);
 460         if (ServerSource)
 461         {
 462                 Utils->SetRemoteBursting(ServerSource, false);
 463
 464                 if (params[0] == "*")
 465                 {
 466                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
 467                 }
 468                 else if (*(params[0].c_str()) == '#')
 469                 {
 470                         Channel* c = this->Instance->FindChan(params[0]);
 471                         if (c)
 472                         {
 473                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
 474                         }
 475                 }
 476                 else if (*(params[0].c_str()) != '#')
 477                 {
 478                         User* u = this->Instance->FindNick(params[0]);
 479                         if (u)
 480                         {
 481                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
 482                         }
 483                 }
 484         }
 485
 486         params[2] = ":" + params[2];
 487         Utils->DoOneToAllButSender(prefix,"METADATA",params,prefix);
 488         return true;
 489 }
 490
 491 bool TreeSocket::ServerVersion(const std::string &prefix, std::deque<std::string> &params)
 492 {
 493         if (params.size() < 1)
 494                 return true;
 495
 496         TreeServer* ServerSource = Utils->FindServer(prefix);
 497
 498         if (ServerSource)
 499         {
 500                 ServerSource->SetVersion(params[0]);
 501         }
 502         params[0] = ":" + params[0];
 503         Utils->DoOneToAllButSender(prefix,"VERSION",params,prefix);
 504         return true;
 505 }
 506
 507 bool TreeSocket::ChangeHost(const std::string &prefix, std::deque<std::string> &params)
 508 {
 509         if (params.size() < 1)
 510                 return true;
 511         User* u = this->Instance->FindNick(prefix);
 512
 513         if (u)
 514         {
 515                 u->ChangeDisplayedHost(params[0].c_str());
 516                 Utils->DoOneToAllButSender(prefix,"FHOST",params,u->server);
 517         }
 518         return true;
 519 }
 520
 521 bool TreeSocket::AddLine(const std::string &prefix, std::deque<std::string> &params)
 522 {
 523         if (params.size() < 6)
 524                 return true;
 525         bool propogate = false;
 526         if (!this->bursting)
 527                 Utils->lines_to_apply = 0;
 528         switch (*(params[0].c_str()))
 529         {
 530                 case 'Z':
 531                         propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 532                         Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 533                         if (propogate)
 534                                 Utils->lines_to_apply |= APPLY_ZLINES;
 535                 break;
 536                 case 'Q':
 537                         propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 538                         Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 539                         if (propogate)
 540                                 Utils->lines_to_apply |= APPLY_QLINES;
 541                 break;
 542                 case 'E':
 543                         propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 544                         Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 545                 break;
 546                 case 'G':
 547                         propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 548                         Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 549                         if (propogate)
 550                                 Utils->lines_to_apply |= APPLY_GLINES;
 551                 break;
 552                 case 'K':
 553                         propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 554                         if (propogate)
 555                                 Utils->lines_to_apply |= APPLY_KLINES;
 556                 break;
 557                 default:
 558                         /* Just in case... */
 559                         this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
 560                         propogate = false;
 561                 break;
 562         }
 563         /* Send it on its way */
 564         if (propogate)
 565         {
 566                 if (atoi(params[4].c_str()))
 567                 {
 568                         time_t c_requires_crap = ConvToInt(params[4]) + Instance->Time();
 569                         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());
 570                 }
 571                 else
 572                 {
 573                         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());
 574                 }
 575                 params[5] = ":" + params[5];
 576                 Utils->DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
 577         }
 578         if (!this->bursting)
 579         {
 580                 Instance->XLines->apply_lines(Utils->lines_to_apply);
 581                 Utils->lines_to_apply = 0;
 582         }
 583         return true;
 584 }
 585
 586 bool TreeSocket::ChangeName(const std::string &prefix, std::deque<std::string> &params)
 587 {
 588         if (params.size() < 1)
 589                 return true;
 590         User* u = this->Instance->FindNick(prefix);
 591         if (u)
 592         {
 593                 u->ChangeName(params[0].c_str());
 594                 params[0] = ":" + params[0];
 595                 Utils->DoOneToAllButSender(prefix,"FNAME",params,u->server);
 596         }
 597         return true;
 598 }
 599
 600 bool TreeSocket::Whois(const std::string &prefix, std::deque<std::string> &params)
 601 {
 602         if (params.size() < 1)
 603                 return true;
 604         User* u = this->Instance->FindNick(prefix);
 605         if (u)
 606         {
 607                 // an incoming request
 608                 if (params.size() == 1)
 609                 {
 610                         User* x = this->Instance->FindNick(params[0]);
 611                         if ((x) && (IS_LOCAL(x)))
 612                         {
 613                                 User* x = this->Instance->FindNick(params[0]);
 614                                 char signon[MAXBUF];
 615                                 char idle[MAXBUF];
 616                                 snprintf(signon, MAXBUF, "%lu", (unsigned long)x->signon);
 617                                 snprintf(idle, MAXBUF, "%lu", (unsigned long)abs((x->idle_lastmsg) - Instance->Time(true)));
 618                                 std::deque<std::string> par;
 619                                 par.push_back(prefix);
 620                                 par.push_back(signon);
 621                                 par.push_back(idle);
 622                                 // ours, we're done, pass it BACK
 623                                 Utils->DoOneToOne(params[0], "IDLE", par, u->server);
 624                         }
 625                         else
 626                         {
 627                                 // not ours pass it on
 628                                 if (x)
 629                                         Utils->DoOneToOne(prefix, "IDLE", params, x->server);
 630                         }
 631                 }
 632                 else if (params.size() == 3)
 633                 {
 634                         std::string who_did_the_whois = params[0];
 635                         User* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
 636                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
 637                         {
 638                                 // an incoming reply to a whois we sent out
 639                                 std::string nick_whoised = prefix;
 640                                 unsigned long signon = atoi(params[1].c_str());
 641                                 unsigned long idle = atoi(params[2].c_str());
 642                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
 643                                 {
 644                                         do_whois(this->Instance, who_to_send_to, u, signon, idle, nick_whoised.c_str());
 645                                 }
 646                         }
 647                         else
 648                         {
 649                                 // not ours, pass it on
 650                                 if (who_to_send_to)
 651                                         Utils->DoOneToOne(prefix, "IDLE", params, who_to_send_to->server);
 652                         }
 653                 }
 654         }
 655         return true;
 656 }
 657
 658 bool TreeSocket::Push(const std::string &prefix, std::deque<std::string> &params)
 659 {
 660         if (params.size() < 2)
 661                 return true;
 662         User* u = this->Instance->FindNick(params[0]);
 663         if (!u)
 664                 return true;
 665         if (IS_LOCAL(u))
 666         {
 667                 u->Write(params[1]);
 668         }
 669         else
 670         {
 671                 // continue the raw onwards
 672                 params[1] = ":" + params[1];
 673                 Utils->DoOneToOne(prefix,"PUSH",params,u->server);
 674         }
 675         return true;
 676 }
 677
 678 bool TreeSocket::HandleSetTime(const std::string &prefix, std::deque<std::string> &params)
 679 {
 680         if (!params.size() || !Utils->EnableTimeSync)
 681                 return true;
 682
 683         bool force = false;
 684
 685         if ((params.size() == 2) && (params[1] == "FORCE"))
 686                 force = true;
 687
 688         time_t them = atoi(params[0].c_str());
 689         time_t us = Instance->Time(false);
 690
 691         time_t diff = them - us;
 692
 693         Utils->DoOneToAllButSender(prefix, "TIMESET", params, prefix);
 694
 695         if (force || (them != us))
 696         {
 697                 time_t old = Instance->SetTimeDelta(diff);
 698                 Instance->Log(DEBUG, "TS (diff %d) from %s applied (old delta was %d)", diff, prefix.c_str(), old);
 699         }
 700
 701         return true;
 702 }
 703
 704 bool TreeSocket::Time(const std::string &prefix, std::deque<std::string> &params)
 705 {
 706         // :source.server TIME remote.server sendernick
 707         // :remote.server TIME source.server sendernick TS
 708         if (params.size() == 2)
 709         {
 710                 // someone querying our time?
 711                 if (this->Instance->Config->ServerName == params[0] || this->Instance->Config->GetSID() == params[0])
 712                 {
 713                         User* u = this->Instance->FindNick(params[1]);
 714                         if (u)
 715                         {
 716                                 params.push_back(ConvToStr(Instance->Time(false)));
 717                                 params[0] = prefix;
 718                                 Utils->DoOneToOne(this->Instance->Config->GetSID(),"TIME",params,params[0]);
 719                         }
 720                 }
 721                 else
 722                 {
 723                         // not us, pass it on
 724                         User* u = this->Instance->FindNick(params[1]);
 725                         if (u)
 726                                 Utils->DoOneToOne(prefix,"TIME",params,params[0]);
 727                 }
 728         }
 729         else if (params.size() == 3)
 730         {
 731                 // a response to a previous TIME
 732                 User* u = this->Instance->FindNick(params[1]);
 733                 if ((u) && (IS_LOCAL(u)))
 734                 {
 735                         time_t rawtime = atol(params[2].c_str());
 736                         struct tm * timeinfo;
 737                         timeinfo = localtime(&rawtime);
 738                         char tms[26];
 739                         snprintf(tms,26,"%s",asctime(timeinfo));
 740                         tms[24] = 0;
 741                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
 742                 }
 743                 else
 744                 {
 745                         if (u)
 746                                 Utils->DoOneToOne(prefix,"TIME",params,u->server);
 747                 }
 748         }
 749         return true;
 750 }
 751
 752 bool TreeSocket::LocalPing(const std::string &prefix, std::deque<std::string> &params)
 753 {
 754         if (params.size() < 1)
 755                 return true;
 756         if (params.size() == 1)
 757         {
 758                 std::string stufftobounce = params[0];
 759                 this->WriteLine(std::string(":")+this->Instance->Config->GetSID()+" PONG "+stufftobounce);
 760                 return true;
 761         }
 762         else
 763         {
 764                 std::string forwardto = params[1];
 765                 if (forwardto == this->Instance->Config->ServerName || forwardto == this->Instance->Config->GetSID())
 766                 {
 767                         // this is a ping for us, send back PONG to the requesting server
 768                         params[1] = params[0];
 769                         params[0] = forwardto;
 770                         Utils->DoOneToOne(forwardto,"PONG",params,params[1]);
 771                 }
 772                 else
 773                 {
 774                         // not for us, pass it on :)
 775                         Utils->DoOneToOne(prefix,"PING",params,forwardto);
 776                 }
 777                 return true;
 778         }
 779 }
 780
 781 /** TODO: This creates a total mess of output and needs to really use irc::modestacker.
 782  */
 783 bool TreeSocket::RemoveStatus(const std::string &prefix, std::deque<std::string> &params)
 784 {
 785         if (params.size() < 1)
 786                 return true;
 787         Channel* c = Instance->FindChan(params[0]);
 788         if (c)
 789         {
 790                 for (char modeletter = 'A'; modeletter <= 'z'; modeletter++)
 791                 {
 792                         ModeHandler* mh = Instance->Modes->FindMode(modeletter, MODETYPE_CHANNEL);
 793                         if (mh)
 794                                 mh->RemoveMode(c);
 795                 }
 796         }
 797         return true;
 798 }
 799
 800 bool TreeSocket::RemoteServer(const std::string &prefix, std::deque<std::string> &params)
 801 {
 802         if (params.size() < 5)
 803         {
 804                 SendError("Protocol error - Missing SID");
 805                 return false;
 806         }
 807
 808         std::string servername = params[0];
 809         std::string password = params[1];
 810         // hopcount is not used for a remote server, we calculate this ourselves
 811         std::string sid = params[3];
 812         std::string description = params[4];
 813         TreeServer* ParentOfThis = Utils->FindServer(prefix);
 814         if (!ParentOfThis)
 815         {
 816                 this->SendError("Protocol error - Introduced remote server from unknown server "+prefix);
 817                 return false;
 818         }
 819         if (!Utils->IsSID(sid))
 820         {
 821                 this->SendError("Invalid format server ID: "+sid+"!");
 822                 return false;
 823         }
 824         TreeServer* CheckDupe = Utils->FindServer(servername);
 825         if (CheckDupe)
 826         {
 827                 this->SendError("Server "+servername+" already exists!");
 828                 this->Instance->SNO->WriteToSnoMask('l',"Server \2"+servername+"\2 being introduced from \2" + prefix + "\2 denied, already exists. Closing link with " + prefix);
 829                 return false;
 830         }
 831
 832         Link* lnk = Utils->FindLink(servername);
 833
 834         TreeServer *Node = new TreeServer(this->Utils, this->Instance, servername, description, sid, ParentOfThis,NULL, lnk ? lnk->Hidden : false);
 835
 836         if (Node->DuplicateID())
 837         {
 838                 this->SendError("Server ID "+sid+" already exists on the network!");
 839                 this->Instance->SNO->WriteToSnoMask('l',"Server \2"+servername+"\2 being introduced from \2" + prefix + "\2 denied, server ID already exists on the network. Closing link with " + prefix);
 840                 return false;
 841         }
 842
 843         ParentOfThis->AddChild(Node);
 844         params[4] = ":" + params[4];
 845         Utils->SetRemoteBursting(Node, true);
 846         Utils->DoOneToAllButSender(prefix,"SERVER",params,prefix);
 847         this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
 848         return true;
 849 }
 850
 851 bool TreeSocket::ComparePass(const std::string &ours, const std::string &theirs)
 852 {
 853         if ((!strncmp(ours.c_str(), "HMAC-SHA256:", 12)) || (!strncmp(theirs.c_str(), "HMAC-SHA256:", 12)))
 854         {
 855                 /* One or both of us specified hmac sha256, but we don't have sha256 module loaded!
 856                  * We can't allow this password as valid.
 857                  */
 858                 if (!Instance->Modules->Find("m_sha256.so") || !Utils->ChallengeResponse)
 859                                 return false;
 860                 else
 861                         /* Straight string compare of hashes */
 862                         return ours == theirs;
 863         }
 864         else
 865                 /* Straight string compare of plaintext */
 866                 return ours == theirs;
 867 }
 868
 869 bool TreeSocket::Outbound_Reply_Server(std::deque<std::string> &params)
 870 {
 871         if (params.size() < 5)
 872         {
 873                 SendError("Protocol error - Missing SID");
 874                 return false;
 875         }
 876
 877         irc::string servername = params[0].c_str();
 878         std::string sname = params[0];
 879         std::string password = params[1];
 880         std::string sid = params[3];
 881         std::string description = params[4];
 882         int hops = atoi(params[2].c_str());
 883
 884         this->InboundServerName = sname;
 885         this->InboundDescription = description;
 886         this->InboundSID = sid;
 887
 888         if (!sentcapab)
 889                 this->SendCapabilities();
 890
 891         if (hops)
 892         {
 893                 this->SendError("Server too far away for authentication");
 894                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
 895                 return false;
 896         }
 897
 898         if (!Utils->IsSID(sid))
 899         {
 900                 this->SendError("Invalid format server ID: "+sid+"!");
 901                 return false;
 902         }
 903
 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                         TreeServer* CheckDupe = Utils->FindServer(sname);
 909                         if (CheckDupe)
 910                         {
 911                                 this->SendError("Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
 912                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
 913                                 return false;
 914                         }
 915                         // Begin the sync here. this kickstarts the
 916                         // other side, waiting in WAIT_AUTH_2 state,
 917                         // into starting their burst, as it shows
 918                         // that we're happy.
 919                         this->LinkState = CONNECTED;
 920                         // we should add the details of this server now
 921                         // to the servers tree, as a child of the root
 922                         // node.
 923
 924                         TreeServer *Node = new TreeServer(this->Utils, this->Instance, sname, description, sid, Utils->TreeRoot, this, x->Hidden);
 925
 926                         if (Node->DuplicateID())
 927                         {
 928                                 this->SendError("Server ID "+sid+" already exists on the network!");
 929                                 this->Instance->SNO->WriteToSnoMask('l',"Server \2"+assign(servername)+"\2 being introduced denied, server ID already exists on the network. Closing link.");
 930                                 return false;
 931                         }
 932
 933                         Utils->TreeRoot->AddChild(Node);
 934                         params[4] = ":" + params[4];
 935                         Utils->DoOneToAllButSender(Instance->Config->GetSID(),"SERVER",params,sname);
 936                         this->bursting = true;
 937                         this->DoBurst(Node);
 938                         return true;
 939                 }
 940         }
 941         this->SendError("Invalid credentials");
 942         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
 943         return false;
 944 }
 945
 946 bool TreeSocket::Inbound_Server(std::deque<std::string> &params)
 947 {
 948         if (params.size() < 5)
 949         {
 950                 SendError("Protocol error - Missing SID");
 951                 return false;
 952         }
 953
 954         irc::string servername = params[0].c_str();
 955         std::string sname = params[0];
 956         std::string password = params[1];
 957         std::string sid = params[3];
 958         std::string description = params[4];
 959         int hops = atoi(params[2].c_str());
 960
 961         this->InboundServerName = sname;
 962         this->InboundDescription = description;
 963         this->InboundSID = sid;
 964
 965         if (!sentcapab)
 966                 this->SendCapabilities();
 967
 968         if (hops)
 969         {
 970                 this->SendError("Server too far away for authentication");
 971                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
 972                 return false;
 973         }
 974
 975         if (!Utils->IsSID(sid))
 976         {
 977                 this->SendError("Invalid format server ID: "+sid+"!");
 978                 return false;
 979         }
 980
 981         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 982         {
 983                 if ((x->Name == servername) && ((ComparePass(this->MakePass(x->RecvPass,this->GetOurChallenge()),password) || x->RecvPass == password && (this->GetTheirChallenge().empty()))))
 984                 {
 985                         /* First check for instances of the server that are waiting between the inbound and outbound SERVER command */
 986                         TreeSocket* CheckDupeSocket = Utils->FindBurstingServer(sname);
 987                         if (CheckDupeSocket)
 988                         {
 989                                 /* If we find one, we abort the link to prevent a race condition */
 990                                 this->SendError("Negotiation collision");
 991                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists in a negotiating state.");
 992                                 CheckDupeSocket->SendError("Negotiation collision");
 993                                 Instance->SE->DelFd(CheckDupeSocket);
 994                                 CheckDupeSocket->Close();
 995                                 return false;
 996                         }
 997                         /* Check for fully initialized instances of the server by id */
 998                         Instance->Log(DEBUG,"Looking for dupe SID %s", sid.c_str());
 999                         TreeServer* CheckDupeSID = Utils->FindServerID(sid);
1000                         if (CheckDupeSID)
1001                         {
1002                                 this->SendError("Server ID "+CheckDupeSID->GetID()+" already exists on server "+CheckDupeSID->GetName()+"!");
1003                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server ID '"+CheckDupeSID->GetID()+
1004                                                 "' already exists on server "+CheckDupeSID->GetName());
1005                                 return false;
1006                         }
1007                         /* Now check for fully initialized instances of the server by name */
1008                         TreeServer* CheckDupe = Utils->FindServer(sname);
1009                         if (CheckDupe)
1010                         {
1011                                 this->SendError("Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
1012                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
1013                                 return false;
1014                         }
1015                         this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
1016                         if (this->Hook)
1017                         {
1018                                 std::string name = BufferedSocketNameRequest((Module*)Utils->Creator, this->Hook).Send();
1019                                 this->Instance->SNO->WriteToSnoMask('l',"Connection from \2"+sname+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] using transport \2"+name+"\2");
1020                         }
1021
1022                         Utils->AddBurstingServer(sname,this);
1023
1024                         // this is good. Send our details: Our server name and description and hopcount of 0,
1025                         // along with the sendpass from this block.
1026                         this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+this->MakePass(x->SendPass, this->GetTheirChallenge())+" 0 "+Instance->Config->GetSID()+" :"+this->Instance->Config->ServerDesc);
1027                         // move to the next state, we are now waiting for THEM.
1028                         this->LinkState = WAIT_AUTH_2;
1029                         return true;
1030                 }
1031         }
1032         this->SendError("Invalid credentials");
1033         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
1034         return false;
1035 }
1036
1037 void TreeSocket::Split(const std::string &line, std::deque<std::string> &n)
1038 {
1039         n.clear();
1040         irc::tokenstream tokens(line);
1041         std::string param;
1042         while (tokens.GetToken(param))
1043         {
1044                 n.push_back(param);
1045         }
1046         return;
1047 }
1048
1049 bool TreeSocket::ProcessLine(std::string &line)
1050 {
1051         std::deque<std::string> params;
1052         irc::string command;
1053         std::string prefix;
1054
1055         line = line.substr(0, line.find_first_of("\r\n"));
1056
1057         if (line.empty())
1058                 return true;
1059
1060         Instance->Log(DEBUG, "S[%d] I %s", this->GetFd(), line.c_str());
1061
1062         this->Split(line.c_str(),params);
1063
1064         if (params.empty())
1065                 return true;
1066
1067         if ((params[0][0] == ':') && (params.size() > 1))
1068         {
1069                 prefix = params[0].substr(1);
1070                 params.pop_front();
1071         }
1072         command = params[0].c_str();
1073         params.pop_front();
1074         switch (this->LinkState)
1075         {
1076                 TreeServer* Node;
1077
1078                 case WAIT_AUTH_1:
1079                         // Waiting for SERVER command from remote server. Server initiating
1080                         // the connection sends the first SERVER command, listening server
1081                         // replies with theirs if its happy, then if the initiator is happy,
1082                         // it starts to send its net sync, which starts the merge, otherwise
1083                         // it sends an ERROR.
1084                         if (command == "PASS")
1085                         {
1086                                 /* Silently ignored */
1087                         }
1088                         else if (command == "SERVER")
1089                         {
1090                                 return this->Inbound_Server(params);
1091                         }
1092                         else if (command == "ERROR")
1093                         {
1094                                 return this->Error(params);
1095                         }
1096                         else if (command == "USER")
1097                         {
1098                                 this->SendError("Client connections to this port are prohibited.");
1099                                 return false;
1100                         }
1101                         else if (command == "CAPAB")
1102                         {
1103                                 return this->Capab(params);
1104                         }
1105                         else
1106                         {
1107                                 irc::string error = "Invalid command in negotiation phase: " + command;
1108                                 this->SendError(assign(error));
1109                                 return false;
1110                         }
1111                 break;
1112                 case WAIT_AUTH_2:
1113                         // Waiting for start of other side's netmerge to say they liked our
1114                         // password.
1115                         if (command == "SERVER")
1116                         {
1117                                 // cant do this, they sent it to us in the WAIT_AUTH_1 state!
1118                                 // silently ignore.
1119                                 return true;
1120                         }
1121                         else if (command == "BURST")
1122                         {
1123                                 if (params.size() && Utils->EnableTimeSync)
1124                                 {
1125                                         bool we_have_delta = (Instance->Time(false) != Instance->Time(true));
1126                                         time_t them = atoi(params[0].c_str());
1127                                         time_t delta = them - Instance->Time(false);
1128                                         if ((delta < -600) || (delta > 600))
1129                                         {
1130                                                 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));
1131                                                 SendError("Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than five minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
1132                                                 return false;
1133                                         }
1134                                         else if ((delta < -30) || (delta > 30))
1135                                         {
1136                                                 Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds. Please consider synching your clocks.", abs(delta));
1137                                         }
1138
1139                                         if (!Utils->MasterTime && !we_have_delta)
1140                                         {
1141                                                 this->Instance->SetTimeDelta(delta);
1142                                                 // Send this new timestamp to any other servers
1143                                                 Utils->DoOneToMany(Instance->Config->GetSID(), "TIMESET", params);
1144                                         }
1145                                 }
1146                                 this->LinkState = CONNECTED;
1147                                 Link* lnk = Utils->FindLink(InboundServerName);
1148
1149                                 Node = new TreeServer(this->Utils, this->Instance, InboundServerName, InboundDescription, InboundSID, Utils->TreeRoot, this, lnk ? lnk->Hidden : false);
1150
1151                                 if (Node->DuplicateID())
1152                                 {
1153                                         this->SendError("Server ID "+InboundSID+" already exists on the network!");
1154                                         this->Instance->SNO->WriteToSnoMask('l',"Server \2"+InboundServerName+"\2 being introduced from \2" + prefix + "\2 denied, server ID already exists on the network. Closing link.");
1155                                         return false;
1156                                 }
1157                                 Utils->DelBurstingServer(this);
1158                                 Utils->TreeRoot->AddChild(Node);
1159                                 params.clear();
1160                                 params.push_back(InboundServerName);
1161                                 params.push_back("*");
1162                                 params.push_back("1");
1163                                 params.push_back(InboundSID);
1164                                 params.push_back(":"+InboundDescription);
1165                                 Utils->DoOneToAllButSender(Instance->Config->GetSID(),"SERVER",params,InboundServerName);
1166                                 this->bursting = true;
1167                                 this->DoBurst(Node);
1168                         }
1169                         else if (command == "ERROR")
1170                         {
1171                                 return this->Error(params);
1172                         }
1173                         else if (command == "CAPAB")
1174                         {
1175                                 return this->Capab(params);
1176                         }
1177
1178                 break;
1179                 case LISTENER:
1180                         this->SendError("Internal error -- listening socket accepted its own descriptor!!!");
1181                         return false;
1182                 break;
1183                 case CONNECTING:
1184                         if (command == "SERVER")
1185                         {
1186                                 // another server we connected to, which was in WAIT_AUTH_1 state,
1187                                 // has just sent us their credentials. If we get this far, theyre
1188                                 // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
1189                                 // if we're happy with this, we should send our netburst which
1190                                 // kickstarts the merge.
1191                                 return this->Outbound_Reply_Server(params);
1192                         }
1193                         else if (command == "ERROR")
1194                         {
1195                                 return this->Error(params);
1196                         }
1197                         else if (command == "CAPAB")
1198                         {
1199                                 return this->Capab(params);
1200                         }
1201                 break;
1202                 case CONNECTED:
1203                         // This is the 'authenticated' state, when all passwords
1204                         // have been exchanged and anything past this point is taken
1205                         // as gospel.
1206
1207                         if (!prefix.empty())
1208                         {
1209                                 std::string direction = prefix;
1210
1211                                 User *t = this->Instance->FindUUID(prefix);
1212                                 if (t)
1213                                 {
1214                                         direction = t->server;
1215                                 }
1216
1217                                 TreeServer* route_back_again = Utils->BestRouteTo(direction);
1218                                 if ((!route_back_again) || (route_back_again->GetSocket() != this))
1219                                 {
1220                                         if (route_back_again)
1221                                                 Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
1222                                         return true;
1223                                 }
1224                                 /* Fix by brain:
1225                                  * When there is activity on the socket, reset the ping counter so
1226                                  * that we're not wasting bandwidth pinging an active server.
1227                                  */
1228                                 route_back_again->SetNextPingTime(time(NULL) + Utils->PingFreq);
1229                                 route_back_again->SetPingFlag();
1230                         }
1231                         else
1232                         {
1233                                 TreeServer* n = Utils->FindServer(GetName());
1234                                 if (n)
1235                                         prefix = n->GetID();
1236                                 else
1237                                         prefix = GetName();
1238                         }
1239
1240                         if ((command == "MODE") && (params.size() >= 2))
1241                         {
1242                                 Channel* channel = Instance->FindChan(params[0]);
1243                                 if (channel)
1244                                 {
1245                                         User* x = Instance->FindNick(prefix);
1246                                         if (x)
1247                                         {
1248                                                 if (warned.find(x->server) == warned.end())
1249                                                 {
1250                                                         Instance->Log(DEFAULT,"WARNING: I revceived modes '%s' from another server '%s'. This is not compliant with InspIRCd. Please check that server for bugs.", params[1].c_str(), x->server);
1251                                                         Instance->SNO->WriteToSnoMask('d', "WARNING: The server %s is sending nonstandard modes: '%s MODE %s' where FMODE should be used, and may cause desyncs.", x->server, x->nick, params[1].c_str());
1252                                                         warned[x->server] = x->nick;
1253                                                 }
1254                                         }
1255                                 }
1256                         }
1257
1258                         if (command == "SVSMODE")
1259                         {
1260                                 /* Services expects us to implement
1261                                  * SVSMODE. In inspircd its the same as
1262                                  * MODE anyway.
1263                                  */
1264                                 command = "MODE";
1265                         }
1266                         std::string target;
1267                         /* Yes, know, this is a mess. Its reasonably fast though as we're
1268                          * working with std::string here.
1269                          */
1270                         if (command == "UID")
1271                         {
1272                                 return this->ParseUID(prefix, params);
1273                         }
1274                         else if (command == "FJOIN")
1275                         {
1276                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1277                                 if (ServerSource)
1278                                         Utils->SetRemoteBursting(ServerSource, false);
1279                                 return this->ForceJoin(prefix,params);
1280                         }
1281                         else if (command == "STATS")
1282                         {
1283                                 return this->Stats(prefix, params);
1284                         }
1285                         else if (command == "MOTD")
1286                         {
1287                                 return this->Motd(prefix, params);
1288                         }
1289                         else if (command == "KILL" && Utils->IsServer(prefix))
1290                         {
1291                                 return this->RemoteKill(prefix,params);
1292                         }
1293                         else if (command == "MODULES")
1294                         {
1295                                 return this->Modules(prefix, params);
1296                         }
1297                         else if (command == "ADMIN")
1298                         {
1299                                 return this->Admin(prefix, params);
1300                         }
1301                         else if (command == "SERVER")
1302                         {
1303                                 return this->RemoteServer(prefix,params);
1304                         }
1305                         else if (command == "ERROR")
1306                         {
1307                                 return this->Error(params);
1308                         }
1309                         else if (command == "OPERTYPE")
1310                         {
1311                                 return this->OperType(prefix,params);
1312                         }
1313                         else if (command == "FMODE")
1314                         {
1315                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1316                                 if (ServerSource)
1317                                         Utils->SetRemoteBursting(ServerSource, false);
1318                                 return this->ForceMode(prefix,params);
1319                         }
1320                         else if (command == "FTOPIC")
1321                         {
1322                                 return this->ForceTopic(prefix,params);
1323                         }
1324                         else if (command == "REHASH")
1325                         {
1326                                 return this->RemoteRehash(prefix,params);
1327                         }
1328                         else if (command == "METADATA")
1329                         {
1330                                 return this->MetaData(prefix,params);
1331                         }
1332                         else if (command == "REMSTATUS")
1333                         {
1334                                 return this->RemoveStatus(prefix,params);
1335                         }
1336                         else if (command == "PING")
1337                         {
1338                                 /*
1339                                  * We just got a ping from a server that's bursting.
1340                                  * This can't be right, so set them to not bursting, and
1341                                  * apply their lines.
1342                                  */
1343                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1344                                 if (ServerSource)
1345                                         Utils->SetRemoteBursting(ServerSource, false);
1346
1347                                 if (this->bursting)
1348                                 {
1349                                         this->bursting = false;
1350                                         Instance->XLines->apply_lines(Utils->lines_to_apply);
1351                                         Utils->lines_to_apply = 0;
1352                                 }
1353
1354                                 return this->LocalPing(prefix,params);
1355                         }
1356                         else if (command == "PONG")
1357                         {
1358                                 /*
1359                                  * We just got a pong from a server that's bursting.
1360                                  * This can't be right, so set them to not bursting, and
1361                                  * apply their lines.
1362                                  */
1363                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1364                                 if (ServerSource)
1365                                         Utils->SetRemoteBursting(ServerSource, false);
1366
1367                                 if (this->bursting)
1368                                 {
1369                                         this->bursting = false;
1370                                         Instance->XLines->apply_lines(Utils->lines_to_apply);
1371                                         Utils->lines_to_apply = 0;
1372                                 }
1373
1374                                 return this->LocalPong(prefix,params);
1375                         }
1376                         else if (command == "VERSION")
1377                         {
1378                                 return this->ServerVersion(prefix,params);
1379                         }
1380                         else if (command == "FHOST")
1381                         {
1382                                 return this->ChangeHost(prefix,params);
1383                         }
1384                         else if (command == "FNAME")
1385                         {
1386                                 return this->ChangeName(prefix,params);
1387                         }
1388                         else if (command == "ADDLINE")
1389                         {
1390                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1391                                 if (ServerSource)
1392                                         Utils->SetRemoteBursting(ServerSource, false);
1393                                 return this->AddLine(prefix,params);
1394                         }
1395                         else if (command == "SVSNICK")
1396                         {
1397                                 return this->ForceNick(prefix,params);
1398                         }
1399                         else if (command == "OPERQUIT")
1400                         {
1401                                 return this->OperQuit(prefix,params);
1402                         }
1403                         else if (command == "IDLE")
1404                         {
1405                                 return this->Whois(prefix,params);
1406                         }
1407                         else if (command == "PUSH")
1408                         {
1409                                 return this->Push(prefix,params);
1410                         }
1411                         else if (command == "TIMESET")
1412                         {
1413                                 return this->HandleSetTime(prefix, params);
1414                         }
1415                         else if (command == "TIME")
1416                         {
1417                                 return this->Time(prefix,params);
1418                         }
1419                         else if ((command == "KICK") && (Utils->IsServer(prefix)))
1420                         {
1421                                 std::string sourceserv = this->myhost;
1422                                 if (params.size() == 3)
1423                                 {
1424                                         User* user = this->Instance->FindNick(params[1]);
1425                                         Channel* chan = this->Instance->FindChan(params[0]);
1426                                         if (user && chan)
1427                                         {
1428                                                 if (!chan->ServerKickUser(user, params[2].c_str(), false))
1429                                                         /* Yikes, the channels gone! */
1430                                                         delete chan;
1431                                         }
1432                                 }
1433                                 if (!this->InboundServerName.empty())
1434                                 {
1435                                         sourceserv = this->InboundServerName;
1436                                 }
1437                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1438                         }
1439                         else if (command == "SVSJOIN")
1440                         {
1441                                 return this->ServiceJoin(prefix,params);
1442                         }
1443                         else if (command == "SVSPART")
1444                         {
1445                                 return this->ServicePart(prefix,params);
1446                         }
1447                         else if (command == "SQUIT")
1448                         {
1449                                 if (params.size() == 2)
1450                                 {
1451                                         this->Squit(Utils->FindServer(params[0]),params[1]);
1452                                 }
1453                                 return true;
1454                         }
1455                         else if (command == "OPERNOTICE")
1456                         {
1457                                 std::string sourceserv = this->myhost;
1458                                 if (!this->InboundServerName.empty())
1459                                         sourceserv = this->InboundServerName;
1460                                 if (params.size() >= 1)
1461                                         Instance->WriteOpers("*** From " + prefix + ": " + params[0]);
1462                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1463                         }
1464                         else if (command == "MODENOTICE")
1465                         {
1466                                 std::string sourceserv = this->myhost;
1467                                 if (!this->InboundServerName.empty())
1468                                         sourceserv = this->InboundServerName;
1469                                 if (params.size() >= 2)
1470                                 {
1471                                         Instance->WriteMode(params[0].c_str(), WM_AND, "*** From %s: %s", prefix.c_str(), params[1].c_str());
1472                                 }
1473                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1474                         }
1475                         else if (command == "SNONOTICE")
1476                         {
1477                                 std::string sourceserv = this->myhost;
1478                                 if (!this->InboundServerName.empty())
1479                                         sourceserv = this->InboundServerName;
1480                                 if (params.size() >= 2)
1481                                 {
1482                                         Instance->SNO->WriteToSnoMask(*(params[0].c_str()), "From " + prefix + ": "+ params[1]);
1483                                 }
1484                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1485                         }
1486                         else if (command == "ENDBURST")
1487                         {
1488                                 this->bursting = false;
1489                                 Instance->XLines->apply_lines(Utils->lines_to_apply);
1490                                 Utils->lines_to_apply = 0;
1491                                 std::string sourceserv = this->myhost;
1492                                 if (!this->InboundServerName.empty())
1493                                         sourceserv = this->InboundServerName;
1494                                 this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
1495
1496                                 Event rmode((char*)sourceserv.c_str(), (Module*)Utils->Creator, "new_server");
1497                                 rmode.Send(Instance);
1498
1499                                 return true;
1500                         }
1501                         else
1502                         {
1503                                 /*
1504                                  * Not a special s2s command. Emulate the user doing it.
1505                                  * This saves us having a huge ugly command parser again.
1506                                  */
1507                                 User *who = this->Instance->FindUUID(prefix);
1508
1509                                 std::string sourceserv = this->myhost;
1510                                 if (!this->InboundServerName.empty())
1511                                 {
1512                                         sourceserv = this->InboundServerName;
1513                                 }
1514                                 if ((!who) && (command == "MODE"))
1515                                 {
1516                                         if (Utils->IsServer(prefix))
1517                                         {
1518                                                 const char* modelist[MAXPARAMETERS];
1519                                                 for (size_t i = 0; i < params.size(); i++)
1520                                                         modelist[i] = params[i].c_str();
1521                                                 this->Instance->SendMode(modelist, params.size(), this->Instance->FakeClient);
1522                                                 /* Hot potato! pass it on! */
1523                                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1524                                         }
1525                                 }
1526                                 if (who)
1527                                 {
1528                                         if (command == "NICK")
1529                                         {
1530                                                 if (params.size() != 2)
1531                                                 {
1532                                                         SendError("Protocol violation: NICK message without TS - :"+std::string(who->uuid)+" NICK "+params[0]);
1533                                                         return false;
1534                                                 }
1535                                                 /* Update timestamp on user when they change nicks */
1536                                                 who->age = atoi(params[1].c_str());
1537
1538                                                 /* On nick messages, check that the nick doesnt
1539                                                  * already exist here. If it does, kill their copy,
1540                                                  * and our copy.
1541                                                  */
1542                                                 User* x = this->Instance->FindNickOnly(params[0]);
1543                                                 if ((x) && (x != who))
1544                                                 {
1545                                                         int collideret = 0;
1546                                                         /* x is local, who is remote */
1547                                                         collideret = this->DoCollision(x, who->age, who->ident, who->GetIPString(), who->uuid);
1548                                                         if (collideret != 1)
1549                                                         {
1550                                                                 /*
1551                                                                  * Remote client lost, or both lost,
1552                                                                  * parsing this nickchange would be
1553                                                                  * pointless, as the incoming client's
1554                                                                  * server will soon recieve SVSNICK to
1555                                                                  * change its nick to its UID. :)
1556                                                                  *   -- w00t
1557                                                                  */
1558                                                                 return true;
1559                                                         }
1560 /*
1561 Old nickname collision logic..
1562                                                         std::deque<std::string> p;
1563                                                         p.push_back(params[0]);
1564                                                         p.push_back(":Nickname collision ("+prefix+" -> "+params[0]+")");
1565                                                         Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
1566                                                         p.clear();
1567                                                         p.push_back(prefix);
1568                                                         p.push_back(":Nickname collision");
1569                                                         Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
1570                                                         User::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
1571                                                         User* y = this->Instance->FindNick(prefix);
1572                                                         if (y)
1573                                                         {
1574                                                                 User::QuitUser(this->Instance,y,"Nickname collision");
1575                                                         }
1576                                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1577 */
1578                                                 }
1579                                         }
1580                                         // its a user
1581                                         target = who->server;
1582                                         const char* strparams[127];
1583                                         for (unsigned int q = 0; q < params.size(); q++)
1584                                         {
1585                                                 strparams[q] = params[q].c_str();
1586                                         }
1587                                         switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
1588                                         {
1589                                                 case CMD_INVALID:
1590                                                         this->SendError("Unrecognised or malformed command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
1591                                                         return false;
1592                                                 break;
1593                                                 case CMD_FAILURE:
1594                                                         return true;
1595                                                 break;
1596                                                 default:
1597                                                         /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
1598                                                 break;
1599                                         }
1600                                 }
1601                                 else
1602                                 {
1603                                         // its not a user. Its either a server, or somethings screwed up.
1604                                         if (Utils->IsServer(prefix))
1605                                                 target = this->Instance->Config->GetSID();
1606                                         else
1607                                                 return true;
1608                                 }
1609                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1610
1611                         }
1612                         return true;
1613                 break;
1614         }
1615         return true;
1616 }
1617
1618 std::string TreeSocket::GetName()
1619 {
1620         std::string sourceserv = this->myhost;
1621         if (!this->InboundServerName.empty())
1622         {
1623                 sourceserv = this->InboundServerName;
1624         }
1625         return sourceserv;
1626 }
1627
1628 void TreeSocket::OnTimeout()
1629 {
1630         if (this->LinkState == CONNECTING)
1631         {
1632                 Utils->Creator->RemoteMessage(NULL, "CONNECT: Connection to \002%s\002 timed out.", myhost.c_str());
1633                 Link* MyLink = Utils->FindLink(myhost);
1634                 if (MyLink)
1635                         Utils->DoFailOver(MyLink);
1636         }
1637 }
1638
1639 void TreeSocket::OnClose()
1640 {
1641         if (this->LinkState == LISTENER)
1642                 return;
1643
1644         // Connection closed.
1645         // If the connection is fully up (state CONNECTED)
1646         // then propogate a netsplit to all peers.
1647         std::string quitserver = this->myhost;
1648         if (!this->InboundServerName.empty())
1649         {
1650                 quitserver = this->InboundServerName;
1651         }
1652         TreeServer* s = Utils->FindServer(quitserver);
1653         if (s)
1654         {
1655                 Squit(s,"Remote host closed the connection");
1656         }
1657
1658         if (!quitserver.empty())
1659         {
1660                 Utils->Creator->RemoteMessage(NULL,"Connection to '\2%s\2' failed.",quitserver.c_str());
1661                 time_t server_uptime = Instance->Time() - this->age;
1662                 if (server_uptime)
1663                         Utils->Creator->RemoteMessage(NULL,"Connection to '\2%s\2' was established for %s", quitserver.c_str(), Utils->Creator->TimeToStr(server_uptime).c_str());
1664         }
1665 }
1666
1667 int TreeSocket::OnIncomingConnection(int newsock, char* ip)
1668 {
1669         /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
1670          * or discovering if this port is the server port, we don't allow connections from any
1671          * IPs for which we don't have a link block.
1672          */
1673         bool found = false;
1674
1675         found = (std::find(Utils->ValidIPs.begin(), Utils->ValidIPs.end(), ip) != Utils->ValidIPs.end());
1676         if (!found)
1677         {
1678                 for (vector<std::string>::iterator i = Utils->ValidIPs.begin(); i != Utils->ValidIPs.end(); i++)
1679                         if (irc::sockets::MatchCIDR(ip, (*i).c_str()))
1680                                 found = true;
1681
1682                 if (!found)
1683                 {
1684                         Utils->Creator->RemoteMessage(NULL,"Server connection from %s denied (no link blocks with that IP address)", ip);
1685                         Instance->SE->Close(newsock);
1686                         return false;
1687                 }
1688         }
1689
1690         TreeSocket* s = new TreeSocket(this->Utils, this->Instance, newsock, ip, this->Hook);
1691         s = s; /* Whinge whinge whinge, thats all GCC ever does. */
1692         return true;
1693 }