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 "configreader.h"
  16 #include "users.h"
  17 #include "channels.h"
  18 #include "modules.h"
  19 #include "commands/cmd_whois.h"
  20 #include "commands/cmd_stats.h"
  21 #include "socket.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 static std::map<std::string, std::string> warned;       /* Server names that have had protocol violation warnings displayed for them */
  38
  39 int TreeSocket::WriteLine(std::string line)
  40 {
  41         Instance->Log(DEBUG, "S[%d] -> %s", this->GetFd(), line.c_str());
  42         line.append("\r\n");
  43         return this->Write(line);
  44 }
  45
  46
  47 /* Handle ERROR command */
  48 bool TreeSocket::Error(std::deque<std::string> &params)
  49 {
  50         if (params.size() < 1)
  51                 return false;
  52         this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(!InboundServerName.empty() ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
  53         /* we will return false to cause the socket to close. */
  54         return false;
  55 }
  56
  57 bool TreeSocket::Modules(const std::string &prefix, std::deque<std::string> &params)
  58 {
  59         if (params.empty())
  60                 return true;
  61
  62         if (!this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
  63         {
  64                 /* Pass it on, not for us */
  65                 Utils->DoOneToOne(prefix, "MODULES", params, params[0]);
  66                 return true;
  67         }
  68
  69         char strbuf[MAXBUF];
  70         std::deque<std::string> par;
  71         par.push_back(prefix);
  72         par.push_back("");
  73
  74         userrec* source = this->Instance->FindNick(prefix);
  75         if (!source)
  76                 return true;
  77
  78         for (unsigned int i = 0; i < Instance->Config->module_names.size(); i++)
  79         {
  80                 Version V = Instance->modules[i]->GetVersion();
  81                 char modulename[MAXBUF];
  82                 char flagstate[MAXBUF];
  83                 *flagstate = 0;
  84                 if (V.Flags & VF_STATIC)
  85                         strlcat(flagstate,", static",MAXBUF);
  86                 if (V.Flags & VF_VENDOR)
  87                         strlcat(flagstate,", vendor",MAXBUF);
  88                 if (V.Flags & VF_COMMON)
  89                         strlcat(flagstate,", common",MAXBUF);
  90                 if (V.Flags & VF_SERVICEPROVIDER)
  91                         strlcat(flagstate,", service provider",MAXBUF);
  92                 if (!flagstate[0])
  93                         strcpy(flagstate,"  <no flags>");
  94                 strlcpy(modulename,Instance->Config->module_names[i].c_str(),256);
  95                 if (*source->oper)
  96                 {
  97                         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);
  98                 }
  99                 else
 100                 {
 101                         snprintf(strbuf, MAXBUF, "::%s 900 %s :%s",Instance->Config->ServerName,source->nick,ServerConfig::CleanFilename(modulename));
 102                 }
 103                 par[1] = strbuf;
 104                 Utils->DoOneToOne(Instance->Config->ServerName, "PUSH", par, source->server);
 105         }
 106         snprintf(strbuf, MAXBUF, "::%s 901 %s :End of MODULES list", Instance->Config->ServerName, source->nick);
 107         par[1] = strbuf;
 108         Utils->DoOneToOne(Instance->Config->ServerName, "PUSH", par, source->server);
 109         return true;
 110 }
 111
 112 /** remote MOTD. leet, huh? */
 113 bool TreeSocket::Motd(const std::string &prefix, std::deque<std::string> &params)
 114 {
 115         if (params.size() > 0)
 116         {
 117                 if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
 118                 {
 119                         /* It's for our server */
 120                         string_list results;
 121                         userrec* source = this->Instance->FindNick(prefix);
 122
 123                         if (source)
 124                         {
 125                                 std::deque<std::string> par;
 126                                 par.push_back(prefix);
 127                                 par.push_back("");
 128
 129                                 if (!Instance->Config->MOTD.size())
 130                                 {
 131                                         par[1] = std::string("::")+Instance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
 132                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 133                                         return true;
 134                                 }
 135
 136                                 par[1] = std::string("::")+Instance->Config->ServerName+" 375 "+source->nick+" :"+Instance->Config->ServerName+" message of the day";
 137                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 138
 139                                 for (unsigned int i = 0; i < Instance->Config->MOTD.size(); i++)
 140                                 {
 141                                         par[1] = std::string("::")+Instance->Config->ServerName+" 372 "+source->nick+" :- "+Instance->Config->MOTD[i];
 142                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 143                                 }
 144
 145                                 par[1] = std::string("::")+Instance->Config->ServerName+" 376 "+source->nick+" :End of message of the day.";
 146                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 147                         }
 148                 }
 149                 else
 150                 {
 151                         /* Pass it on */
 152                         userrec* source = this->Instance->FindNick(prefix);
 153                         if (source)
 154                                 Utils->DoOneToOne(prefix, "MOTD", params, params[0]);
 155                 }
 156         }
 157         return true;
 158 }
 159
 160 /** remote ADMIN. leet, huh? */
 161 bool TreeSocket::Admin(const std::string &prefix, std::deque<std::string> &params)
 162 {
 163         if (params.size() > 0)
 164         {
 165                 if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
 166                 {
 167                         /* It's for our server */
 168                         string_list results;
 169                         userrec* source = this->Instance->FindNick(prefix);
 170                         if (source)
 171                         {
 172                                 std::deque<std::string> par;
 173                                 par.push_back(prefix);
 174                                 par.push_back("");
 175                                 par[1] = std::string("::")+Instance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+Instance->Config->ServerName;
 176                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 177                                 par[1] = std::string("::")+Instance->Config->ServerName+" 257 "+source->nick+" :Name     - "+Instance->Config->AdminName;
 178                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 179                                 par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+Instance->Config->AdminNick;
 180                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 181                                 par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+Instance->Config->AdminEmail;
 182                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 183                         }
 184                 }
 185                 else
 186                 {
 187                         /* Pass it on */
 188                         userrec* source = this->Instance->FindNick(prefix);
 189                         if (source)
 190                                 Utils->DoOneToOne(prefix, "ADMIN", params, params[0]);
 191                 }
 192         }
 193         return true;
 194 }
 195
 196 bool TreeSocket::Stats(const std::string &prefix, std::deque<std::string> &params)
 197 {
 198         /* Get the reply to a STATS query if it matches this servername,
 199          * and send it back as a load of PUSH queries
 200          */
 201         if (params.size() > 1)
 202         {
 203                 if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
 204                 {
 205                         /* It's for our server */
 206                         string_list results;
 207                         userrec* source = this->Instance->FindNick(prefix);
 208                         if (source)
 209                         {
 210                                 std::deque<std::string> par;
 211                                 par.push_back(prefix);
 212                                 par.push_back("");
 213                                 DoStats(this->Instance, *(params[0].c_str()), source, results);
 214                                 for (size_t i = 0; i < results.size(); i++)
 215                                 {
 216                                         par[1] = "::" + results[i];
 217                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
 218                                 }
 219                         }
 220                 }
 221                 else
 222                 {
 223                         /* Pass it on */
 224                         userrec* source = this->Instance->FindNick(prefix);
 225                         if (source)
 226                                 Utils->DoOneToOne(prefix, "STATS", params, params[1]);
 227                 }
 228         }
 229         return true;
 230 }
 231
 232
 233 /** Because the core won't let users or even SERVERS set +o,
 234  * we use the OPERTYPE command to do this.
 235  */
 236 bool TreeSocket::OperType(const std::string &prefix, std::deque<std::string> &params)
 237 {
 238         if (params.size() != 1)
 239                 return true;
 240         std::string opertype = params[0];
 241         userrec* u = this->Instance->FindNick(prefix);
 242         if (u)
 243         {
 244                 u->modes[UM_OPERATOR] = 1;
 245                 this->Instance->all_opers.push_back(u);
 246                 strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
 247                 Utils->DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
 248
 249                 TreeServer* remoteserver=Utils->FindServer(u->server);
 250                 bool dosend = true;
 251
 252                 if (this->Utils->quiet_bursts)
 253                 {
 254                         /*
 255                          * If quiet bursts are enabled, and server is bursting or silent uline (i.e. services),
 256                          * then do nothing. -- w00t
 257                          */
 258                         if (
 259                                 this->bursting ||
 260                                 Utils->FindRemoteBurstServer(remoteserver) ||
 261                                 this->Instance->SilentULine(this->Instance->FindServerNamePtr(u->server))
 262                            )
 263                         {
 264                                 dosend = false;
 265                         }
 266                 }
 267
 268                 if (dosend)
 269                         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()));
 270         }
 271         return true;
 272 }
 273
 274 /** Because Andy insists that services-compatible servers must
 275  * implement SVSNICK and SVSJOIN, that's exactly what we do :p
 276  */
 277 bool TreeSocket::ForceNick(const std::string &prefix, std::deque<std::string> &params)
 278 {
 279         if (params.size() < 3)
 280                 return true;
 281
 282         userrec* u = this->Instance->FindNick(params[0]);
 283
 284         if (u)
 285         {
 286                 Utils->DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
 287                 if (IS_LOCAL(u))
 288                 {
 289                         std::deque<std::string> par;
 290                         par.push_back(params[1]);
 291                         if (!u->ForceNickChange(params[1].c_str()))
 292                         {
 293                                 userrec::QuitUser(this->Instance, u, "Nickname collision");
 294                                 return true;
 295                         }
 296                         u->age = atoi(params[2].c_str());
 297                 }
 298         }
 299         return true;
 300 }
 301
 302 bool TreeSocket::OperQuit(const std::string &prefix, std::deque<std::string> &params)
 303 {
 304         if (params.size() < 1)
 305                 return true;
 306
 307         userrec* u = this->Instance->FindNick(prefix);
 308
 309         if (u)
 310         {
 311                 u->SetOperQuit(params[0]);
 312                 params[0] = ":" + params[0];
 313                 Utils->DoOneToAllButSender(prefix,"OPERQUIT",params,prefix);
 314         }
 315         return true;
 316 }
 317
 318 bool TreeSocket::ServiceJoin(const std::string &prefix, std::deque<std::string> &params)
 319 {
 320         if (params.size() < 2)
 321                 return true;
 322
 323         userrec* u = this->Instance->FindNick(params[0]);
 324
 325         if (u)
 326         {
 327                 /* only join if it's local, otherwise just pass it on! */
 328                 if (IS_LOCAL(u))
 329                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false, "", Instance->Time());
 330                 Utils->DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
 331         }
 332         return true;
 333 }
 334
 335 bool TreeSocket::RemoteRehash(const std::string &prefix, std::deque<std::string> &params)
 336 {
 337         if (params.size() < 1)
 338                 return false;
 339
 340         std::string servermask = params[0];
 341
 342         if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
 343         {
 344                 this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated by \002"+prefix+"\002.");
 345                 this->Instance->RehashServer();
 346                 Utils->ReadConfiguration(false);
 347                 InitializeDisabledCommands(Instance->Config->DisabledCommands, Instance);
 348         }
 349         Utils->DoOneToAllButSender(prefix,"REHASH",params,prefix);
 350         return true;
 351 }
 352
 353 bool TreeSocket::RemoteKill(const std::string &prefix, std::deque<std::string> &params)
 354 {
 355         if (params.size() != 2)
 356                 return true;
 357
 358         userrec* who = this->Instance->FindNick(params[0]);
 359
 360         if (who)
 361         {
 362                 /* Prepend kill source, if we don't have one */
 363                 if (*(params[1].c_str()) != '[')
 364                 {
 365                         params[1] = "[" + prefix + "] Killed (" + params[1] +")";
 366                 }
 367                 std::string reason = params[1];
 368                 params[1] = ":" + params[1];
 369                 Utils->DoOneToAllButSender(prefix,"KILL",params,prefix);
 370                 // NOTE: This is safe with kill hiding on, as RemoteKill is only reached if we have a server prefix.
 371                 // in short this is not executed for USERS.
 372                 who->Write(":%s KILL %s :%s (%s)", prefix.c_str(), who->nick, prefix.c_str(), reason.c_str());
 373                 userrec::QuitUser(this->Instance,who,reason);
 374         }
 375         return true;
 376 }
 377
 378 bool TreeSocket::LocalPong(const std::string &prefix, std::deque<std::string> &params)
 379 {
 380         if (params.size() < 1)
 381                 return true;
 382
 383         if (params.size() == 1)
 384         {
 385                 TreeServer* ServerSource = Utils->FindServer(prefix);
 386                 if (ServerSource)
 387                 {
 388                         ServerSource->SetPingFlag();
 389                         timeval t;
 390                         gettimeofday(&t, NULL);
 391                         long ts = (t.tv_sec * 1000) + (t.tv_usec / 1000);
 392                         ServerSource->rtt = ts - ServerSource->LastPingMsec;
 393                 }
 394         }
 395         else
 396         {
 397                 std::string forwardto = params[1];
 398                 if (forwardto == this->Instance->Config->ServerName)
 399                 {
 400                         /*
 401                          * this is a PONG for us
 402                          * if the prefix is a user, check theyre local, and if they are,
 403                          * dump the PONG reply back to their fd. If its a server, do nowt.
 404                          * Services might want to send these s->s, but we dont need to yet.
 405                          */
 406                         userrec* u = this->Instance->FindNick(prefix);
 407                         if (u)
 408                         {
 409                                 u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
 410                         }
 411                 }
 412                 else
 413                 {
 414                         // not for us, pass it on :)
 415                         Utils->DoOneToOne(prefix,"PONG",params,forwardto);
 416                 }
 417         }
 418
 419         return true;
 420 }
 421
 422 bool TreeSocket::MetaData(const std::string &prefix, std::deque<std::string> &params)
 423 {
 424         if (params.size() < 2)
 425                 return true;
 426         else if (params.size() < 3)
 427                 params.push_back("");
 428         TreeServer* ServerSource = Utils->FindServer(prefix);
 429         if (ServerSource)
 430         {
 431                 Utils->SetRemoteBursting(ServerSource, false);
 432
 433                 if (params[0] == "*")
 434                 {
 435                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
 436                 }
 437                 else if (*(params[0].c_str()) == '#')
 438                 {
 439                         chanrec* c = this->Instance->FindChan(params[0]);
 440                         if (c)
 441                         {
 442                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
 443                         }
 444                 }
 445                 else if (*(params[0].c_str()) != '#')
 446                 {
 447                         userrec* u = this->Instance->FindNick(params[0]);
 448                         if (u)
 449                         {
 450                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
 451                         }
 452                 }
 453         }
 454
 455         params[2] = ":" + params[2];
 456         Utils->DoOneToAllButSender(prefix,"METADATA",params,prefix);
 457         return true;
 458 }
 459
 460 bool TreeSocket::ServerVersion(const std::string &prefix, std::deque<std::string> &params)
 461 {
 462         if (params.size() < 1)
 463                 return true;
 464
 465         TreeServer* ServerSource = Utils->FindServer(prefix);
 466
 467         if (ServerSource)
 468         {
 469                 ServerSource->SetVersion(params[0]);
 470         }
 471         params[0] = ":" + params[0];
 472         Utils->DoOneToAllButSender(prefix,"VERSION",params,prefix);
 473         return true;
 474 }
 475
 476 bool TreeSocket::ChangeHost(const std::string &prefix, std::deque<std::string> &params)
 477 {
 478         if (params.size() < 1)
 479                 return true;
 480         userrec* u = this->Instance->FindNick(prefix);
 481
 482         if (u)
 483         {
 484                 u->ChangeDisplayedHost(params[0].c_str());
 485                 Utils->DoOneToAllButSender(prefix,"FHOST",params,u->server);
 486         }
 487         return true;
 488 }
 489
 490 bool TreeSocket::AddLine(const std::string &prefix, std::deque<std::string> &params)
 491 {
 492         if (params.size() < 6)
 493                 return true;
 494         bool propogate = false;
 495         if (!this->bursting)
 496                 Utils->lines_to_apply = 0;
 497         switch (*(params[0].c_str()))
 498         {
 499                 case 'Z':
 500                         propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 501                         Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 502                         if (propogate)
 503                                 Utils->lines_to_apply |= APPLY_ZLINES;
 504                 break;
 505                 case 'Q':
 506                         propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 507                         Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 508                         if (propogate)
 509                                 Utils->lines_to_apply |= APPLY_QLINES;
 510                 break;
 511                 case 'E':
 512                         propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 513                         Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 514                 break;
 515                 case 'G':
 516                         propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 517                         Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 518                         if (propogate)
 519                                 Utils->lines_to_apply |= APPLY_GLINES;
 520                 break;
 521                 case 'K':
 522                         propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 523                         if (propogate)
 524                                 Utils->lines_to_apply |= APPLY_KLINES;
 525                 break;
 526                 default:
 527                         /* Just in case... */
 528                         this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
 529                         propogate = false;
 530                 break;
 531         }
 532         /* Send it on its way */
 533         if (propogate)
 534         {
 535                 if (atoi(params[4].c_str()))
 536                 {
 537                         time_t c_requires_crap = ConvToInt(params[4]) + Instance->Time();
 538                         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());
 539                 }
 540                 else
 541                 {
 542                         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());
 543                 }
 544                 params[5] = ":" + params[5];
 545                 Utils->DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
 546         }
 547         if (!this->bursting)
 548         {
 549                 Instance->XLines->apply_lines(Utils->lines_to_apply);
 550                 Utils->lines_to_apply = 0;
 551         }
 552         return true;
 553 }
 554
 555 bool TreeSocket::ChangeName(const std::string &prefix, std::deque<std::string> &params)
 556 {
 557         if (params.size() < 1)
 558                 return true;
 559         userrec* u = this->Instance->FindNick(prefix);
 560         if (u)
 561         {
 562                 u->ChangeName(params[0].c_str());
 563                 params[0] = ":" + params[0];
 564                 Utils->DoOneToAllButSender(prefix,"FNAME",params,u->server);
 565         }
 566         return true;
 567 }
 568
 569 bool TreeSocket::Whois(const std::string &prefix, std::deque<std::string> &params)
 570 {
 571         if (params.size() < 1)
 572                 return true;
 573         userrec* u = this->Instance->FindNick(prefix);
 574         if (u)
 575         {
 576                 // an incoming request
 577                 if (params.size() == 1)
 578                 {
 579                         userrec* x = this->Instance->FindNick(params[0]);
 580                         if ((x) && (IS_LOCAL(x)))
 581                         {
 582                                 userrec* x = this->Instance->FindNick(params[0]);
 583                                 char signon[MAXBUF];
 584                                 char idle[MAXBUF];
 585                                 snprintf(signon, MAXBUF, "%lu", (unsigned long)x->signon);
 586                                 snprintf(idle, MAXBUF, "%lu", (unsigned long)abs((x->idle_lastmsg) - Instance->Time(true)));
 587                                 std::deque<std::string> par;
 588                                 par.push_back(prefix);
 589                                 par.push_back(signon);
 590                                 par.push_back(idle);
 591                                 // ours, we're done, pass it BACK
 592                                 Utils->DoOneToOne(params[0], "IDLE", par, u->server);
 593                         }
 594                         else
 595                         {
 596                                 // not ours pass it on
 597                                 if (x)
 598                                         Utils->DoOneToOne(prefix, "IDLE", params, x->server);
 599                         }
 600                 }
 601                 else if (params.size() == 3)
 602                 {
 603                         std::string who_did_the_whois = params[0];
 604                         userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
 605                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
 606                         {
 607                                 // an incoming reply to a whois we sent out
 608                                 std::string nick_whoised = prefix;
 609                                 unsigned long signon = atoi(params[1].c_str());
 610                                 unsigned long idle = atoi(params[2].c_str());
 611                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
 612                                 {
 613                                         do_whois(this->Instance, who_to_send_to, u, signon, idle, nick_whoised.c_str());
 614                                 }
 615                         }
 616                         else
 617                         {
 618                                 // not ours, pass it on
 619                                 if (who_to_send_to)
 620                                         Utils->DoOneToOne(prefix, "IDLE", params, who_to_send_to->server);
 621                         }
 622                 }
 623         }
 624         return true;
 625 }
 626
 627 bool TreeSocket::Push(const std::string &prefix, std::deque<std::string> &params)
 628 {
 629         if (params.size() < 2)
 630                 return true;
 631         userrec* u = this->Instance->FindNick(params[0]);
 632         if (!u)
 633                 return true;
 634         if (IS_LOCAL(u))
 635         {
 636                 u->Write(params[1]);
 637         }
 638         else
 639         {
 640                 // continue the raw onwards
 641                 params[1] = ":" + params[1];
 642                 Utils->DoOneToOne(prefix,"PUSH",params,u->server);
 643         }
 644         return true;
 645 }
 646
 647 bool TreeSocket::HandleSetTime(const std::string &prefix, std::deque<std::string> &params)
 648 {
 649         if (!params.size() || !Utils->EnableTimeSync)
 650                 return true;
 651
 652         bool force = false;
 653
 654         if ((params.size() == 2) && (params[1] == "FORCE"))
 655                 force = true;
 656
 657         time_t them = atoi(params[0].c_str());
 658         time_t us = Instance->Time(false);
 659
 660         time_t diff = them - us;
 661
 662         Utils->DoOneToAllButSender(prefix, "TIMESET", params, prefix);
 663
 664         if (force || (them != us))
 665         {
 666                 time_t old = Instance->SetTimeDelta(diff);
 667                 Instance->Log(DEBUG, "TS (diff %d) from %s applied (old delta was %d)", diff, prefix.c_str(), old);
 668         }
 669
 670         return true;
 671 }
 672
 673 bool TreeSocket::Time(const std::string &prefix, std::deque<std::string> &params)
 674 {
 675         // :source.server TIME remote.server sendernick
 676         // :remote.server TIME source.server sendernick TS
 677         if (params.size() == 2)
 678         {
 679                 // someone querying our time?
 680                 if (this->Instance->Config->ServerName == params[0])
 681                 {
 682                         userrec* u = this->Instance->FindNick(params[1]);
 683                         if (u)
 684                         {
 685                                 params.push_back(ConvToStr(Instance->Time(false)));
 686                                 params[0] = prefix;
 687                                 Utils->DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
 688                         }
 689                 }
 690                 else
 691                 {
 692                         // not us, pass it on
 693                         userrec* u = this->Instance->FindNick(params[1]);
 694                         if (u)
 695                                 Utils->DoOneToOne(prefix,"TIME",params,params[0]);
 696                 }
 697         }
 698         else if (params.size() == 3)
 699         {
 700                 // a response to a previous TIME
 701                 userrec* u = this->Instance->FindNick(params[1]);
 702                 if ((u) && (IS_LOCAL(u)))
 703                 {
 704                         time_t rawtime = atol(params[2].c_str());
 705                         struct tm * timeinfo;
 706                         timeinfo = localtime(&rawtime);
 707                         char tms[26];
 708                         snprintf(tms,26,"%s",asctime(timeinfo));
 709                         tms[24] = 0;
 710                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
 711                 }
 712                 else
 713                 {
 714                         if (u)
 715                                 Utils->DoOneToOne(prefix,"TIME",params,u->server);
 716                 }
 717         }
 718         return true;
 719 }
 720
 721 bool TreeSocket::LocalPing(const std::string &prefix, std::deque<std::string> &params)
 722 {
 723         if (params.size() < 1)
 724                 return true;
 725         if (params.size() == 1)
 726         {
 727                 std::string stufftobounce = params[0];
 728                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
 729                 return true;
 730         }
 731         else
 732         {
 733                 std::string forwardto = params[1];
 734                 if (forwardto == this->Instance->Config->ServerName)
 735                 {
 736                         // this is a ping for us, send back PONG to the requesting server
 737                         params[1] = params[0];
 738                         params[0] = forwardto;
 739                         Utils->DoOneToOne(forwardto,"PONG",params,params[1]);
 740                 }
 741                 else
 742                 {
 743                         // not for us, pass it on :)
 744                         Utils->DoOneToOne(prefix,"PING",params,forwardto);
 745                 }
 746                 return true;
 747         }
 748 }
 749
 750 /** TODO: This creates a total mess of output and needs to really use irc::modestacker.
 751  */
 752 bool TreeSocket::RemoveStatus(const std::string &prefix, std::deque<std::string> &params)
 753 {
 754         if (params.size() < 1)
 755                 return true;
 756         chanrec* c = Instance->FindChan(params[0]);
 757         if (c)
 758         {
 759                 for (char modeletter = 'A'; modeletter <= 'z'; modeletter++)
 760                 {
 761                         ModeHandler* mh = Instance->Modes->FindMode(modeletter, MODETYPE_CHANNEL);
 762                         if (mh)
 763                                 mh->RemoveMode(c);
 764                 }
 765         }
 766         return true;
 767 }
 768
 769 bool TreeSocket::RemoteServer(const std::string &prefix, std::deque<std::string> &params)
 770 {
 771         if (params.size() < 4)
 772                 return false;
 773         std::string servername = params[0];
 774         std::string password = params[1];
 775         // hopcount is not used for a remote server, we calculate this ourselves
 776         std::string description = params[3];
 777         TreeServer* ParentOfThis = Utils->FindServer(prefix);
 778         if (!ParentOfThis)
 779         {
 780                 this->SendError("Protocol error - Introduced remote server from unknown server "+prefix);
 781                 return false;
 782         }
 783         TreeServer* CheckDupe = Utils->FindServer(servername);
 784         if (CheckDupe)
 785         {
 786                 this->SendError("Server "+servername+" already exists!");
 787                 this->Instance->SNO->WriteToSnoMask('l',"Server \2"+servername+"\2 being introduced from \2" + prefix + "\2 denied, already exists. Closing link with " + prefix);
 788                 return false;
 789         }
 790         Link* lnk = Utils->FindLink(servername);
 791         TreeServer* Node = new TreeServer(this->Utils,this->Instance,servername,description,ParentOfThis,NULL, lnk ? lnk->Hidden : false);
 792         ParentOfThis->AddChild(Node);
 793         params[3] = ":" + params[3];
 794         Utils->SetRemoteBursting(Node, true);
 795         Utils->DoOneToAllButSender(prefix,"SERVER",params,prefix);
 796         this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
 797         return true;
 798 }
 799
 800 bool TreeSocket::ComparePass(const std::string &ours, const std::string &theirs)
 801 {
 802         if ((!strncmp(ours.c_str(), "HMAC-SHA256:", 12)) || (!strncmp(theirs.c_str(), "HMAC-SHA256:", 12)))
 803         {
 804                 /* One or both of us specified hmac sha256, but we don't have sha256 module loaded!
 805                  * We can't allow this password as valid.
 806                  */
 807                 if (!Instance->FindModule("m_sha256.so") || !Utils->ChallengeResponse)
 808                                 return false;
 809                 else
 810                         /* Straight string compare of hashes */
 811                         return ours == theirs;
 812         }
 813         else
 814                 /* Straight string compare of plaintext */
 815                 return ours == theirs;
 816 }
 817
 818 bool TreeSocket::Outbound_Reply_Server(std::deque<std::string> &params)
 819 {
 820         if (params.size() < 4)
 821                 return false;
 822
 823         irc::string servername = params[0].c_str();
 824         std::string sname = params[0];
 825         std::string password = params[1];
 826         std::string description = params[3];
 827         int hops = atoi(params[2].c_str());
 828
 829         this->InboundServerName = sname;
 830         this->InboundDescription = description;
 831
 832         if (!sentcapab)
 833                 this->SendCapabilities();
 834
 835         if (hops)
 836         {
 837                 this->SendError("Server too far away for authentication");
 838                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
 839                 return false;
 840         }
 841
 842         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 843         {
 844                 if ((x->Name == servername) && ((ComparePass(this->MakePass(x->RecvPass,this->GetOurChallenge()),password)) || (x->RecvPass == password && (this->GetTheirChallenge().empty()))))
 845                 {
 846                         TreeServer* CheckDupe = Utils->FindServer(sname);
 847                         if (CheckDupe)
 848                         {
 849                                 this->SendError("Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
 850                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
 851                                 return false;
 852                         }
 853                         // Begin the sync here. this kickstarts the
 854                         // other side, waiting in WAIT_AUTH_2 state,
 855                         // into starting their burst, as it shows
 856                         // that we're happy.
 857                         this->LinkState = CONNECTED;
 858                         // we should add the details of this server now
 859                         // to the servers tree, as a child of the root
 860                         // node.
 861                         TreeServer* Node = new TreeServer(this->Utils,this->Instance,sname,description,Utils->TreeRoot,this,x->Hidden);
 862                         Utils->TreeRoot->AddChild(Node);
 863                         params[3] = ":" + params[3];
 864                         Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,sname);
 865                         this->bursting = true;
 866                         this->DoBurst(Node);
 867                         return true;
 868                 }
 869         }
 870         this->SendError("Invalid credentials");
 871         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
 872         return false;
 873 }
 874
 875 bool TreeSocket::Inbound_Server(std::deque<std::string> &params)
 876 {
 877         if (params.size() < 4)
 878                 return false;
 879         irc::string servername = params[0].c_str();
 880         std::string sname = params[0];
 881         std::string password = params[1];
 882         std::string description = params[3];
 883         int hops = atoi(params[2].c_str());
 884
 885         this->InboundServerName = sname;
 886         this->InboundDescription = description;
 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         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 899         {
 900                 if ((x->Name == servername) && ((ComparePass(this->MakePass(x->RecvPass,this->GetOurChallenge()),password) || x->RecvPass == password && (this->GetTheirChallenge().empty()))))
 901                 {
 902                         /* First check for instances of the server that are waiting between the inbound and outbound SERVER command */
 903                         TreeSocket* CheckDupeSocket = Utils->FindBurstingServer(sname);
 904                         if (CheckDupeSocket)
 905                         {
 906                                 /* If we find one, we abort the link to prevent a race condition */
 907                                 this->SendError("Negotiation collision");
 908                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists in a negotiating state.");
 909                                 CheckDupeSocket->SendError("Negotiation collision");
 910                                 Instance->SE->DelFd(CheckDupeSocket);
 911                                 CheckDupeSocket->Close();
 912                                 return false;
 913                         }
 914                         /* Now check for fully initialized instances of the server */
 915                         TreeServer* CheckDupe = Utils->FindServer(sname);
 916                         if (CheckDupe)
 917                         {
 918                                 this->SendError("Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
 919                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
 920                                 return false;
 921                         }
 922                         this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
 923                         if (this->Hook)
 924                         {
 925                                 std::string name = InspSocketNameRequest((Module*)Utils->Creator, this->Hook).Send();
 926                                 this->Instance->SNO->WriteToSnoMask('l',"Connection from \2"+sname+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] using transport \2"+name+"\2");
 927                         }
 928
 929                         Utils->AddBurstingServer(sname,this);
 930
 931                         // this is good. Send our details: Our server name and description and hopcount of 0,
 932                         // along with the sendpass from this block.
 933                         this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+this->MakePass(x->SendPass, this->GetTheirChallenge())+" 0 :"+this->Instance->Config->ServerDesc);
 934                         // move to the next state, we are now waiting for THEM.
 935                         this->LinkState = WAIT_AUTH_2;
 936                         return true;
 937                 }
 938         }
 939         this->SendError("Invalid credentials");
 940         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
 941         return false;
 942 }
 943
 944 void TreeSocket::Split(const std::string &line, std::deque<std::string> &n)
 945 {
 946         n.clear();
 947         irc::tokenstream tokens(line);
 948         std::string param;
 949         while (tokens.GetToken(param))
 950         {
 951                 if (!param.empty())
 952                         n.push_back(param);
 953         }
 954         return;
 955 }
 956
 957 bool TreeSocket::ProcessLine(std::string &line)
 958 {
 959         std::deque<std::string> params;
 960         irc::string command;
 961         std::string prefix;
 962
 963         line = line.substr(0, line.find_first_of("\r\n"));
 964
 965         if (line.empty())
 966                 return true;
 967
 968         Instance->Log(DEBUG, "S[%d] <- %s", this->GetFd(), line.c_str());
 969
 970         this->Split(line.c_str(),params);
 971
 972         if (params.empty())
 973                 return true;
 974
 975         if ((params[0][0] == ':') && (params.size() > 1))
 976         {
 977                 prefix = params[0].substr(1);
 978                 params.pop_front();
 979         }
 980         command = params[0].c_str();
 981         params.pop_front();
 982         switch (this->LinkState)
 983         {
 984                 TreeServer* Node;
 985
 986                 case WAIT_AUTH_1:
 987                         // Waiting for SERVER command from remote server. Server initiating
 988                         // the connection sends the first SERVER command, listening server
 989                         // replies with theirs if its happy, then if the initiator is happy,
 990                         // it starts to send its net sync, which starts the merge, otherwise
 991                         // it sends an ERROR.
 992                         if (command == "PASS")
 993                         {
 994                                 /* Silently ignored */
 995                         }
 996                         else if (command == "SERVER")
 997                         {
 998                                 return this->Inbound_Server(params);
 999                         }
1000                         else if (command == "ERROR")
1001                         {
1002                                 return this->Error(params);
1003                         }
1004                         else if (command == "USER")
1005                         {
1006                                 this->SendError("Client connections to this port are prohibited.");
1007                                 return false;
1008                         }
1009                         else if (command == "CAPAB")
1010                         {
1011                                 return this->Capab(params);
1012                         }
1013                         else if ((command == "U") || (command == "S"))
1014                         {
1015                                 this->SendError("Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
1016                                 return false;
1017                         }
1018                         else
1019                         {
1020                                 irc::string error = "Invalid command in negotiation phase: " + command;
1021                                 this->SendError(assign(error));
1022                                 return false;
1023                         }
1024                 break;
1025                 case WAIT_AUTH_2:
1026                         // Waiting for start of other side's netmerge to say they liked our
1027                         // password.
1028                         if (command == "SERVER")
1029                         {
1030                                 // cant do this, they sent it to us in the WAIT_AUTH_1 state!
1031                                 // silently ignore.
1032                                 return true;
1033                         }
1034                         else if ((command == "U") || (command == "S"))
1035                         {
1036                                 this->SendError("Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
1037                                 return false;
1038                         }
1039                         else if (command == "BURST")
1040                         {
1041                                 if (params.size() && Utils->EnableTimeSync)
1042                                 {
1043                                         bool we_have_delta = (Instance->Time(false) != Instance->Time(true));
1044                                         time_t them = atoi(params[0].c_str());
1045                                         time_t delta = them - Instance->Time(false);
1046                                         if ((delta < -600) || (delta > 600))
1047                                         {
1048                                                 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));
1049                                                 SendError("Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than five minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
1050                                                 return false;
1051                                         }
1052                                         else if ((delta < -30) || (delta > 30))
1053                                         {
1054                                                 Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds. Please consider synching your clocks.", abs(delta));
1055                                         }
1056
1057                                         if (!Utils->MasterTime && !we_have_delta)
1058                                         {
1059                                                 this->Instance->SetTimeDelta(delta);
1060                                                 // Send this new timestamp to any other servers
1061                                                 Utils->DoOneToMany(Utils->TreeRoot->GetName(), "TIMESET", params);
1062                                         }
1063                                 }
1064                                 this->LinkState = CONNECTED;
1065                                 Link* lnk = Utils->FindLink(InboundServerName);
1066                                 Node = new TreeServer(this->Utils,this->Instance, InboundServerName, InboundDescription, Utils->TreeRoot, this, lnk ? lnk->Hidden : false);
1067                                 Utils->DelBurstingServer(this);
1068                                 Utils->TreeRoot->AddChild(Node);
1069                                 params.clear();
1070                                 params.push_back(InboundServerName);
1071                                 params.push_back("*");
1072                                 params.push_back("1");
1073                                 params.push_back(":"+InboundDescription);
1074                                 Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,InboundServerName);
1075                                 this->bursting = true;
1076                                 this->DoBurst(Node);
1077                         }
1078                         else if (command == "ERROR")
1079                         {
1080                                 return this->Error(params);
1081                         }
1082                         else if (command == "CAPAB")
1083                         {
1084                                 return this->Capab(params);
1085                         }
1086
1087                 break;
1088                 case LISTENER:
1089                         this->SendError("Internal error -- listening socket accepted its own descriptor!!!");
1090                         return false;
1091                 break;
1092                 case CONNECTING:
1093                         if (command == "SERVER")
1094                         {
1095                                 // another server we connected to, which was in WAIT_AUTH_1 state,
1096                                 // has just sent us their credentials. If we get this far, theyre
1097                                 // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
1098                                 // if we're happy with this, we should send our netburst which
1099                                 // kickstarts the merge.
1100                                 return this->Outbound_Reply_Server(params);
1101                         }
1102                         else if (command == "ERROR")
1103                         {
1104                                 return this->Error(params);
1105                         }
1106                         else if (command == "CAPAB")
1107                         {
1108                                 return this->Capab(params);
1109                         }
1110                 break;
1111                 case CONNECTED:
1112                         // This is the 'authenticated' state, when all passwords
1113                         // have been exchanged and anything past this point is taken
1114                         // as gospel.
1115
1116                         if (!prefix.empty())
1117                         {
1118                                 std::string direction = prefix;
1119                                 userrec* t = this->Instance->FindNick(prefix);
1120                                 if (t)
1121                                 {
1122                                         direction = t->server;
1123                                 }
1124                                 TreeServer* route_back_again = Utils->BestRouteTo(direction);
1125                                 if ((!route_back_again) || (route_back_again->GetSocket() != this))
1126                                 {
1127                                         if (route_back_again)
1128                                                 Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
1129                                         return true;
1130                                 }
1131                                 /* Fix by brain:
1132                                  * When there is activity on the socket, reset the ping counter so
1133                                  * that we're not wasting bandwidth pinging an active server.
1134                                  */
1135                                 route_back_again->SetNextPingTime(time(NULL) + Utils->PingFreq);
1136                                 route_back_again->SetPingFlag();
1137                         }
1138                         else
1139                         {
1140                                 prefix = this->GetName();
1141                         }
1142
1143                         if ((command == "MODE") && (params.size() >= 2))
1144                         {
1145                                 chanrec* channel = Instance->FindChan(params[0]);
1146                                 if (channel)
1147                                 {
1148                                         userrec* x = Instance->FindNick(prefix);
1149                                         if (x)
1150                                         {
1151                                                 if (warned.find(x->server) == warned.end())
1152                                                 {
1153                                                         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);
1154                                                         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());
1155                                                         warned[x->server] = x->nick;
1156                                                 }
1157                                         }
1158                                 }
1159                         }
1160
1161                         if (command == "SVSMODE")
1162                         {
1163                                 /* Services expects us to implement
1164                                  * SVSMODE. In inspircd its the same as
1165                                  * MODE anyway.
1166                                  */
1167                                 command = "MODE";
1168                         }
1169                         std::string target;
1170                         /* Yes, know, this is a mess. Its reasonably fast though as we're
1171                          * working with std::string here.
1172                          */
1173                         if ((command == "NICK") && (params.size() >= 8))
1174                         {
1175                                 return this->IntroduceClient(prefix,params);
1176                         }
1177                         else if (command == "FJOIN")
1178                         {
1179                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1180                                 if (ServerSource)
1181                                         Utils->SetRemoteBursting(ServerSource, false);
1182                                 return this->ForceJoin(prefix,params);
1183                         }
1184                         else if (command == "STATS")
1185                         {
1186                                 return this->Stats(prefix, params);
1187                         }
1188                         else if (command == "MOTD")
1189                         {
1190                                 return this->Motd(prefix, params);
1191                         }
1192                         else if (command == "KILL" && Utils->IsServer(prefix))
1193                         {
1194                                 return this->RemoteKill(prefix,params);
1195                         }
1196                         else if (command == "MODULES")
1197                         {
1198                                 return this->Modules(prefix, params);
1199                         }
1200                         else if (command == "ADMIN")
1201                         {
1202                                 return this->Admin(prefix, params);
1203                         }
1204                         else if (command == "SERVER")
1205                         {
1206                                 return this->RemoteServer(prefix,params);
1207                         }
1208                         else if (command == "ERROR")
1209                         {
1210                                 return this->Error(params);
1211                         }
1212                         else if (command == "OPERTYPE")
1213                         {
1214                                 return this->OperType(prefix,params);
1215                         }
1216                         else if (command == "FMODE")
1217                         {
1218                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1219                                 if (ServerSource)
1220                                         Utils->SetRemoteBursting(ServerSource, false);
1221                                 return this->ForceMode(prefix,params);
1222                         }
1223                         else if (command == "FTOPIC")
1224                         {
1225                                 return this->ForceTopic(prefix,params);
1226                         }
1227                         else if (command == "REHASH")
1228                         {
1229                                 return this->RemoteRehash(prefix,params);
1230                         }
1231                         else if (command == "METADATA")
1232                         {
1233                                 return this->MetaData(prefix,params);
1234                         }
1235                         else if (command == "REMSTATUS")
1236                         {
1237                                 return this->RemoveStatus(prefix,params);
1238                         }
1239                         else if (command == "PING")
1240                         {
1241                                 if (prefix.empty())
1242                                         prefix = this->GetName();
1243                                 /*
1244                                  * We just got a ping from a server that's bursting.
1245                                  * This can't be right, so set them to not bursting, and
1246                                  * apply their lines.
1247                                  */
1248                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1249                                 if (ServerSource)
1250                                         Utils->SetRemoteBursting(ServerSource, false);
1251
1252                                 if (this->bursting)
1253                                 {
1254                                         this->bursting = false;
1255                                         Instance->XLines->apply_lines(Utils->lines_to_apply);
1256                                         Utils->lines_to_apply = 0;
1257                                 }
1258
1259                                 return this->LocalPing(prefix,params);
1260                         }
1261                         else if (command == "PONG")
1262                         {
1263                                 if (prefix.empty())
1264                                         prefix = this->GetName();
1265                                 /*
1266                                  * We just got a pong from a server that's bursting.
1267                                  * This can't be right, so set them to not bursting, and
1268                                  * apply their lines.
1269                                  */
1270                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1271                                 if (ServerSource)
1272                                         Utils->SetRemoteBursting(ServerSource, false);
1273
1274                                 if (this->bursting)
1275                                 {
1276                                         this->bursting = false;
1277                                         Instance->XLines->apply_lines(Utils->lines_to_apply);
1278                                         Utils->lines_to_apply = 0;
1279                                 }
1280
1281                                 return this->LocalPong(prefix,params);
1282                         }
1283                         else if (command == "VERSION")
1284                         {
1285                                 return this->ServerVersion(prefix,params);
1286                         }
1287                         else if (command == "FHOST")
1288                         {
1289                                 return this->ChangeHost(prefix,params);
1290                         }
1291                         else if (command == "FNAME")
1292                         {
1293                                 return this->ChangeName(prefix,params);
1294                         }
1295                         else if (command == "ADDLINE")
1296                         {
1297                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1298                                 if (ServerSource)
1299                                         Utils->SetRemoteBursting(ServerSource, false);
1300                                 return this->AddLine(prefix,params);
1301                         }
1302                         else if (command == "SVSNICK")
1303                         {
1304                                 if (prefix.empty())
1305                                 {
1306                                         prefix = this->GetName();
1307                                 }
1308                                 return this->ForceNick(prefix,params);
1309                         }
1310                         else if (command == "OPERQUIT")
1311                         {
1312                                 return this->OperQuit(prefix,params);
1313                         }
1314                         else if (command == "IDLE")
1315                         {
1316                                 return this->Whois(prefix,params);
1317                         }
1318                         else if (command == "PUSH")
1319                         {
1320                                 return this->Push(prefix,params);
1321                         }
1322                         else if (command == "TIMESET")
1323                         {
1324                                 return this->HandleSetTime(prefix, params);
1325                         }
1326                         else if (command == "TIME")
1327                         {
1328                                 return this->Time(prefix,params);
1329                         }
1330                         else if ((command == "KICK") && (Utils->IsServer(prefix)))
1331                         {
1332                                 std::string sourceserv = this->myhost;
1333                                 if (params.size() == 3)
1334                                 {
1335                                         userrec* user = this->Instance->FindNick(params[1]);
1336                                         chanrec* chan = this->Instance->FindChan(params[0]);
1337                                         if (user && chan)
1338                                         {
1339                                                 if (!chan->ServerKickUser(user, params[2].c_str(), false))
1340                                                         /* Yikes, the channels gone! */
1341                                                         delete chan;
1342                                         }
1343                                 }
1344                                 if (!this->InboundServerName.empty())
1345                                 {
1346                                         sourceserv = this->InboundServerName;
1347                                 }
1348                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1349                         }
1350                         else if (command == "SVSJOIN")
1351                         {
1352                                 if (prefix.empty())
1353                                 {
1354                                         prefix = this->GetName();
1355                                 }
1356                                 return this->ServiceJoin(prefix,params);
1357                         }
1358                         else if (command == "SQUIT")
1359                         {
1360                                 if (params.size() == 2)
1361                                 {
1362                                         this->Squit(Utils->FindServer(params[0]),params[1]);
1363                                 }
1364                                 return true;
1365                         }
1366                         else if (command == "OPERNOTICE")
1367                         {
1368                                 std::string sourceserv = this->myhost;
1369                                 if (!this->InboundServerName.empty())
1370                                         sourceserv = this->InboundServerName;
1371                                 if (params.size() >= 1)
1372                                         Instance->WriteOpers("*** From " + sourceserv + ": " + params[0]);
1373                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1374                         }
1375                         else if (command == "MODENOTICE")
1376                         {
1377                                 std::string sourceserv = this->myhost;
1378                                 if (!this->InboundServerName.empty())
1379                                         sourceserv = this->InboundServerName;
1380                                 if (params.size() >= 2)
1381                                 {
1382                                         Instance->WriteMode(params[0].c_str(), WM_AND, "*** From %s: %s", sourceserv.c_str(), params[1].c_str());
1383                                 }
1384                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1385                         }
1386                         else if (command == "SNONOTICE")
1387                         {
1388                                 std::string sourceserv = this->myhost;
1389                                 if (!this->InboundServerName.empty())
1390                                         sourceserv = this->InboundServerName;
1391                                 if (params.size() >= 2)
1392                                 {
1393                                         Instance->SNO->WriteToSnoMask(*(params[0].c_str()), "From " + sourceserv + ": "+ params[1]);
1394                                 }
1395                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1396                         }
1397                         else if (command == "ENDBURST")
1398                         {
1399                                 this->bursting = false;
1400                                 Instance->XLines->apply_lines(Utils->lines_to_apply);
1401                                 Utils->lines_to_apply = 0;
1402                                 std::string sourceserv = this->myhost;
1403                                 if (!this->InboundServerName.empty())
1404                                         sourceserv = this->InboundServerName;
1405                                 this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
1406
1407                                 Event rmode((char*)sourceserv.c_str(), (Module*)Utils->Creator, "new_server");
1408                                 rmode.Send(Instance);
1409
1410                                 return true;
1411                         }
1412                         else
1413                         {
1414                                 // not a special inter-server command.
1415                                 // Emulate the actual user doing the command,
1416                                 // this saves us having a huge ugly parser.
1417                                 userrec* who = this->Instance->FindNick(prefix);
1418                                 std::string sourceserv = this->myhost;
1419                                 if (!this->InboundServerName.empty())
1420                                 {
1421                                         sourceserv = this->InboundServerName;
1422                                 }
1423                                 if ((!who) && (command == "MODE"))
1424                                 {
1425                                         if (Utils->IsServer(prefix))
1426                                         {
1427                                                 const char* modelist[MAXPARAMETERS];
1428                                                 for (size_t i = 0; i < params.size(); i++)
1429                                                         modelist[i] = params[i].c_str();
1430                                                 userrec* fake = new userrec(Instance);
1431                                                 fake->SetFd(FD_MAGIC_NUMBER);
1432                                                 this->Instance->SendMode(modelist, params.size(), fake);
1433
1434                                                 delete fake;
1435                                                 /* Hot potato! pass it on! */
1436                                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1437                                         }
1438                                 }
1439                                 if (who)
1440                                 {
1441                                         if ((command == "NICK") && (params.size() > 0))
1442                                         {
1443                                                 /* On nick messages, check that the nick doesnt
1444                                                  * already exist here. If it does, kill their copy,
1445                                                  * and our copy.
1446                                                  */
1447                                                 userrec* x = this->Instance->FindNick(params[0]);
1448                                                 if ((x) && (x != who))
1449                                                 {
1450                                                         std::deque<std::string> p;
1451                                                         p.push_back(params[0]);
1452                                                         p.push_back(":Nickname collision ("+prefix+" -> "+params[0]+")");
1453                                                         Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
1454                                                         p.clear();
1455                                                         p.push_back(prefix);
1456                                                         p.push_back(":Nickname collision");
1457                                                         Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
1458                                                         userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
1459                                                         userrec* y = this->Instance->FindNick(prefix);
1460                                                         if (y)
1461                                                         {
1462                                                                 userrec::QuitUser(this->Instance,y,"Nickname collision");
1463                                                         }
1464                                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1465                                                 }
1466                                         }
1467                                         // its a user
1468                                         target = who->server;
1469                                         const char* strparams[127];
1470                                         for (unsigned int q = 0; q < params.size(); q++)
1471                                         {
1472                                                 strparams[q] = params[q].c_str();
1473                                         }
1474                                         switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
1475                                         {
1476                                                 case CMD_INVALID:
1477                                                         this->SendError("Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
1478                                                         return false;
1479                                                 break;
1480                                                 case CMD_FAILURE:
1481                                                         return true;
1482                                                 break;
1483                                                 default:
1484                                                         /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
1485                                                 break;
1486                                         }
1487                                 }
1488                                 else
1489                                 {
1490                                         // its not a user. Its either a server, or somethings screwed up.
1491                                         if (Utils->IsServer(prefix))
1492                                                 target = this->Instance->Config->ServerName;
1493                                         else
1494                                                 return true;
1495                                 }
1496                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1497
1498                         }
1499                         return true;
1500                 break;
1501         }
1502         return true;
1503 }
1504
1505 std::string TreeSocket::GetName()
1506 {
1507         std::string sourceserv = this->myhost;
1508         if (!this->InboundServerName.empty())
1509         {
1510                 sourceserv = this->InboundServerName;
1511         }
1512         return sourceserv;
1513 }
1514
1515 void TreeSocket::OnTimeout()
1516 {
1517         if (this->LinkState == CONNECTING)
1518         {
1519                 Utils->Creator->RemoteMessage(NULL, "CONNECT: Connection to \002%s\002 timed out.", myhost.c_str());
1520                 Link* MyLink = Utils->FindLink(myhost);
1521                 if (MyLink)
1522                         Utils->DoFailOver(MyLink);
1523         }
1524 }
1525
1526 void TreeSocket::OnClose()
1527 {
1528         if (this->LinkState == LISTENER)
1529                 return;
1530
1531         // Connection closed.
1532         // If the connection is fully up (state CONNECTED)
1533         // then propogate a netsplit to all peers.
1534         std::string quitserver = this->myhost;
1535         if (!this->InboundServerName.empty())
1536         {
1537                 quitserver = this->InboundServerName;
1538         }
1539         TreeServer* s = Utils->FindServer(quitserver);
1540         if (s)
1541         {
1542                 Squit(s,"Remote host closed the connection");
1543         }
1544
1545         if (!quitserver.empty())
1546         {
1547                 Utils->Creator->RemoteMessage(NULL,"Connection to '\2%s\2' failed.",quitserver.c_str());
1548                 time_t server_uptime = Instance->Time() - this->age;
1549                 if (server_uptime)
1550                         Utils->Creator->RemoteMessage(NULL,"Connection to '\2%s\2' was established for %s", quitserver.c_str(), Utils->Creator->TimeToStr(server_uptime).c_str());
1551         }
1552 }
1553
1554 int TreeSocket::OnIncomingConnection(int newsock, char* ip)
1555 {
1556         /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
1557          * or discovering if this port is the server port, we don't allow connections from any
1558          * IPs for which we don't have a link block.
1559          */
1560         bool found = false;
1561
1562         found = (std::find(Utils->ValidIPs.begin(), Utils->ValidIPs.end(), ip) != Utils->ValidIPs.end());
1563         if (!found)
1564         {
1565                 for (vector<std::string>::iterator i = Utils->ValidIPs.begin(); i != Utils->ValidIPs.end(); i++)
1566                         if (irc::sockets::MatchCIDR(ip, (*i).c_str()))
1567                                 found = true;
1568
1569                 if (!found)
1570                 {
1571                         Utils->Creator->RemoteMessage(NULL,"Server connection from %s denied (no link blocks with that IP address)", ip);
1572                         close(newsock);
1573                         return false;
1574                 }
1575         }
1576
1577         TreeSocket* s = new TreeSocket(this->Utils, this->Instance, newsock, ip, this->Hook);
1578         s = s; /* Whinge whinge whinge, thats all GCC ever does. */
1579         return true;
1580 }