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         if (!this->Instance->IsChannel(params[1].c_str()))
 324                 return true;
 325
 326         userrec* u = this->Instance->FindNick(params[0]);
 327
 328         if (u)
 329         {
 330                 /* only join if it's local, otherwise just pass it on! */
 331                 if (IS_LOCAL(u))
 332                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false, "", Instance->Time());
 333                 Utils->DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
 334         }
 335         return true;
 336 }
 337
 338 bool TreeSocket::RemoteRehash(const std::string &prefix, std::deque<std::string> &params)
 339 {
 340         if (params.size() < 1)
 341                 return false;
 342
 343         std::string servermask = params[0];
 344
 345         if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
 346         {
 347                 this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated by \002"+prefix+"\002.");
 348                 this->Instance->RehashServer();
 349                 Utils->ReadConfiguration(false);
 350                 InitializeDisabledCommands(Instance->Config->DisabledCommands, Instance);
 351         }
 352         Utils->DoOneToAllButSender(prefix,"REHASH",params,prefix);
 353         return true;
 354 }
 355
 356 bool TreeSocket::RemoteKill(const std::string &prefix, std::deque<std::string> &params)
 357 {
 358         if (params.size() != 2)
 359                 return true;
 360
 361         userrec* who = this->Instance->FindNick(params[0]);
 362
 363         if (who)
 364         {
 365                 /* Prepend kill source, if we don't have one */
 366                 if (*(params[1].c_str()) != '[')
 367                 {
 368                         params[1] = "[" + prefix + "] Killed (" + params[1] +")";
 369                 }
 370                 std::string reason = params[1];
 371                 params[1] = ":" + params[1];
 372                 Utils->DoOneToAllButSender(prefix,"KILL",params,prefix);
 373                 // NOTE: This is safe with kill hiding on, as RemoteKill is only reached if we have a server prefix.
 374                 // in short this is not executed for USERS.
 375                 who->Write(":%s KILL %s :%s (%s)", prefix.c_str(), who->nick, prefix.c_str(), reason.c_str());
 376                 userrec::QuitUser(this->Instance,who,reason);
 377         }
 378         return true;
 379 }
 380
 381 bool TreeSocket::LocalPong(const std::string &prefix, std::deque<std::string> &params)
 382 {
 383         if (params.size() < 1)
 384                 return true;
 385
 386         if (params.size() == 1)
 387         {
 388                 TreeServer* ServerSource = Utils->FindServer(prefix);
 389                 if (ServerSource)
 390                 {
 391                         ServerSource->SetPingFlag();
 392                         timeval t;
 393                         gettimeofday(&t, NULL);
 394                         long ts = (t.tv_sec * 1000) + (t.tv_usec / 1000);
 395                         ServerSource->rtt = ts - ServerSource->LastPingMsec;
 396                 }
 397         }
 398         else
 399         {
 400                 std::string forwardto = params[1];
 401                 if (forwardto == this->Instance->Config->ServerName)
 402                 {
 403                         /*
 404                          * this is a PONG for us
 405                          * if the prefix is a user, check theyre local, and if they are,
 406                          * dump the PONG reply back to their fd. If its a server, do nowt.
 407                          * Services might want to send these s->s, but we dont need to yet.
 408                          */
 409                         userrec* u = this->Instance->FindNick(prefix);
 410                         if (u)
 411                         {
 412                                 u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
 413                         }
 414                 }
 415                 else
 416                 {
 417                         // not for us, pass it on :)
 418                         Utils->DoOneToOne(prefix,"PONG",params,forwardto);
 419                 }
 420         }
 421
 422         return true;
 423 }
 424
 425 bool TreeSocket::MetaData(const std::string &prefix, std::deque<std::string> &params)
 426 {
 427         if (params.size() < 2)
 428                 return true;
 429         else if (params.size() < 3)
 430                 params.push_back("");
 431         TreeServer* ServerSource = Utils->FindServer(prefix);
 432         if (ServerSource)
 433         {
 434                 Utils->SetRemoteBursting(ServerSource, false);
 435
 436                 if (params[0] == "*")
 437                 {
 438                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
 439                 }
 440                 else if (*(params[0].c_str()) == '#')
 441                 {
 442                         chanrec* c = this->Instance->FindChan(params[0]);
 443                         if (c)
 444                         {
 445                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
 446                         }
 447                 }
 448                 else if (*(params[0].c_str()) != '#')
 449                 {
 450                         userrec* u = this->Instance->FindNick(params[0]);
 451                         if (u)
 452                         {
 453                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
 454                         }
 455                 }
 456         }
 457
 458         params[2] = ":" + params[2];
 459         Utils->DoOneToAllButSender(prefix,"METADATA",params,prefix);
 460         return true;
 461 }
 462
 463 bool TreeSocket::ServerVersion(const std::string &prefix, std::deque<std::string> &params)
 464 {
 465         if (params.size() < 1)
 466                 return true;
 467
 468         TreeServer* ServerSource = Utils->FindServer(prefix);
 469
 470         if (ServerSource)
 471         {
 472                 ServerSource->SetVersion(params[0]);
 473         }
 474         params[0] = ":" + params[0];
 475         Utils->DoOneToAllButSender(prefix,"VERSION",params,prefix);
 476         return true;
 477 }
 478
 479 bool TreeSocket::ChangeHost(const std::string &prefix, std::deque<std::string> &params)
 480 {
 481         if (params.size() < 1)
 482                 return true;
 483         userrec* u = this->Instance->FindNick(prefix);
 484
 485         if (u)
 486         {
 487                 u->ChangeDisplayedHost(params[0].c_str());
 488                 Utils->DoOneToAllButSender(prefix,"FHOST",params,u->server);
 489         }
 490         return true;
 491 }
 492
 493 bool TreeSocket::AddLine(const std::string &prefix, std::deque<std::string> &params)
 494 {
 495         if (params.size() < 6)
 496                 return true;
 497         bool propogate = false;
 498         if (!this->bursting)
 499                 Utils->lines_to_apply = 0;
 500         switch (*(params[0].c_str()))
 501         {
 502                 case 'Z':
 503                         propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 504                         Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 505                         if (propogate)
 506                                 Utils->lines_to_apply |= APPLY_ZLINES;
 507                 break;
 508                 case 'Q':
 509                         propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 510                         Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 511                         if (propogate)
 512                                 Utils->lines_to_apply |= APPLY_QLINES;
 513                 break;
 514                 case 'E':
 515                         propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 516                         Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 517                 break;
 518                 case 'G':
 519                         propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 520                         Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 521                         if (propogate)
 522                                 Utils->lines_to_apply |= APPLY_GLINES;
 523                 break;
 524                 case 'K':
 525                         propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 526                         if (propogate)
 527                                 Utils->lines_to_apply |= APPLY_KLINES;
 528                 break;
 529                 default:
 530                         /* Just in case... */
 531                         this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
 532                         propogate = false;
 533                 break;
 534         }
 535         /* Send it on its way */
 536         if (propogate)
 537         {
 538                 if (atoi(params[4].c_str()))
 539                 {
 540                         time_t c_requires_crap = ConvToInt(params[4]) + Instance->Time();
 541                         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());
 542                 }
 543                 else
 544                 {
 545                         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());
 546                 }
 547                 params[5] = ":" + params[5];
 548                 Utils->DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
 549         }
 550         if (!this->bursting)
 551         {
 552                 Instance->XLines->apply_lines(Utils->lines_to_apply);
 553                 Utils->lines_to_apply = 0;
 554         }
 555         return true;
 556 }
 557
 558 bool TreeSocket::ChangeName(const std::string &prefix, std::deque<std::string> &params)
 559 {
 560         if (params.size() < 1)
 561                 return true;
 562         userrec* u = this->Instance->FindNick(prefix);
 563         if (u)
 564         {
 565                 u->ChangeName(params[0].c_str());
 566                 params[0] = ":" + params[0];
 567                 Utils->DoOneToAllButSender(prefix,"FNAME",params,u->server);
 568         }
 569         return true;
 570 }
 571
 572 bool TreeSocket::Whois(const std::string &prefix, std::deque<std::string> &params)
 573 {
 574         if (params.size() < 1)
 575                 return true;
 576         userrec* u = this->Instance->FindNick(prefix);
 577         if (u)
 578         {
 579                 // an incoming request
 580                 if (params.size() == 1)
 581                 {
 582                         userrec* x = this->Instance->FindNick(params[0]);
 583                         if ((x) && (IS_LOCAL(x)))
 584                         {
 585                                 userrec* x = this->Instance->FindNick(params[0]);
 586                                 char signon[MAXBUF];
 587                                 char idle[MAXBUF];
 588                                 snprintf(signon, MAXBUF, "%lu", (unsigned long)x->signon);
 589                                 snprintf(idle, MAXBUF, "%lu", (unsigned long)abs((x->idle_lastmsg) - Instance->Time(true)));
 590                                 std::deque<std::string> par;
 591                                 par.push_back(prefix);
 592                                 par.push_back(signon);
 593                                 par.push_back(idle);
 594                                 // ours, we're done, pass it BACK
 595                                 Utils->DoOneToOne(params[0], "IDLE", par, u->server);
 596                         }
 597                         else
 598                         {
 599                                 // not ours pass it on
 600                                 if (x)
 601                                         Utils->DoOneToOne(prefix, "IDLE", params, x->server);
 602                         }
 603                 }
 604                 else if (params.size() == 3)
 605                 {
 606                         std::string who_did_the_whois = params[0];
 607                         userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
 608                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
 609                         {
 610                                 // an incoming reply to a whois we sent out
 611                                 std::string nick_whoised = prefix;
 612                                 unsigned long signon = atoi(params[1].c_str());
 613                                 unsigned long idle = atoi(params[2].c_str());
 614                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
 615                                 {
 616                                         do_whois(this->Instance, who_to_send_to, u, signon, idle, nick_whoised.c_str());
 617                                 }
 618                         }
 619                         else
 620                         {
 621                                 // not ours, pass it on
 622                                 if (who_to_send_to)
 623                                         Utils->DoOneToOne(prefix, "IDLE", params, who_to_send_to->server);
 624                         }
 625                 }
 626         }
 627         return true;
 628 }
 629
 630 bool TreeSocket::Push(const std::string &prefix, std::deque<std::string> &params)
 631 {
 632         if (params.size() < 2)
 633                 return true;
 634         userrec* u = this->Instance->FindNick(params[0]);
 635         if (!u)
 636                 return true;
 637         if (IS_LOCAL(u))
 638         {
 639                 u->Write(params[1]);
 640         }
 641         else
 642         {
 643                 // continue the raw onwards
 644                 params[1] = ":" + params[1];
 645                 Utils->DoOneToOne(prefix,"PUSH",params,u->server);
 646         }
 647         return true;
 648 }
 649
 650 bool TreeSocket::HandleSetTime(const std::string &prefix, std::deque<std::string> &params)
 651 {
 652         if (!params.size() || !Utils->EnableTimeSync)
 653                 return true;
 654
 655         bool force = false;
 656
 657         if ((params.size() == 2) && (params[1] == "FORCE"))
 658                 force = true;
 659
 660         time_t them = atoi(params[0].c_str());
 661         time_t us = Instance->Time(false);
 662
 663         time_t diff = them - us;
 664
 665         Utils->DoOneToAllButSender(prefix, "TIMESET", params, prefix);
 666
 667         if (force || (them != us))
 668         {
 669                 time_t old = Instance->SetTimeDelta(diff);
 670                 Instance->Log(DEBUG, "TS (diff %d) from %s applied (old delta was %d)", diff, prefix.c_str(), old);
 671         }
 672
 673         return true;
 674 }
 675
 676 bool TreeSocket::Time(const std::string &prefix, std::deque<std::string> &params)
 677 {
 678         // :source.server TIME remote.server sendernick
 679         // :remote.server TIME source.server sendernick TS
 680         if (params.size() == 2)
 681         {
 682                 // someone querying our time?
 683                 if (this->Instance->Config->ServerName == params[0])
 684                 {
 685                         userrec* u = this->Instance->FindNick(params[1]);
 686                         if (u)
 687                         {
 688                                 params.push_back(ConvToStr(Instance->Time(false)));
 689                                 params[0] = prefix;
 690                                 Utils->DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
 691                         }
 692                 }
 693                 else
 694                 {
 695                         // not us, pass it on
 696                         userrec* u = this->Instance->FindNick(params[1]);
 697                         if (u)
 698                                 Utils->DoOneToOne(prefix,"TIME",params,params[0]);
 699                 }
 700         }
 701         else if (params.size() == 3)
 702         {
 703                 // a response to a previous TIME
 704                 userrec* u = this->Instance->FindNick(params[1]);
 705                 if ((u) && (IS_LOCAL(u)))
 706                 {
 707                         time_t rawtime = atol(params[2].c_str());
 708                         struct tm * timeinfo;
 709                         timeinfo = localtime(&rawtime);
 710                         char tms[26];
 711                         snprintf(tms,26,"%s",asctime(timeinfo));
 712                         tms[24] = 0;
 713                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
 714                 }
 715                 else
 716                 {
 717                         if (u)
 718                                 Utils->DoOneToOne(prefix,"TIME",params,u->server);
 719                 }
 720         }
 721         return true;
 722 }
 723
 724 bool TreeSocket::LocalPing(const std::string &prefix, std::deque<std::string> &params)
 725 {
 726         if (params.size() < 1)
 727                 return true;
 728         if (params.size() == 1)
 729         {
 730                 std::string stufftobounce = params[0];
 731                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
 732                 return true;
 733         }
 734         else
 735         {
 736                 std::string forwardto = params[1];
 737                 if (forwardto == this->Instance->Config->ServerName)
 738                 {
 739                         // this is a ping for us, send back PONG to the requesting server
 740                         params[1] = params[0];
 741                         params[0] = forwardto;
 742                         Utils->DoOneToOne(forwardto,"PONG",params,params[1]);
 743                 }
 744                 else
 745                 {
 746                         // not for us, pass it on :)
 747                         Utils->DoOneToOne(prefix,"PING",params,forwardto);
 748                 }
 749                 return true;
 750         }
 751 }
 752
 753 /** TODO: This creates a total mess of output and needs to really use irc::modestacker.
 754  */
 755 bool TreeSocket::RemoveStatus(const std::string &prefix, std::deque<std::string> &params)
 756 {
 757         if (params.size() < 1)
 758                 return true;
 759         chanrec* c = Instance->FindChan(params[0]);
 760         if (c)
 761         {
 762                 for (char modeletter = 'A'; modeletter <= 'z'; modeletter++)
 763                 {
 764                         ModeHandler* mh = Instance->Modes->FindMode(modeletter, MODETYPE_CHANNEL);
 765                         if (mh)
 766                                 mh->RemoveMode(c);
 767                 }
 768         }
 769         return true;
 770 }
 771
 772 bool TreeSocket::RemoteServer(const std::string &prefix, std::deque<std::string> &params)
 773 {
 774         if (params.size() < 4)
 775                 return false;
 776         std::string servername = params[0];
 777         std::string password = params[1];
 778         // hopcount is not used for a remote server, we calculate this ourselves
 779         std::string description = params[3];
 780         TreeServer* ParentOfThis = Utils->FindServer(prefix);
 781         if (!ParentOfThis)
 782         {
 783                 this->SendError("Protocol error - Introduced remote server from unknown server "+prefix);
 784                 return false;
 785         }
 786         TreeServer* CheckDupe = Utils->FindServer(servername);
 787         if (CheckDupe)
 788         {
 789                 this->SendError("Server "+servername+" already exists!");
 790                 this->Instance->SNO->WriteToSnoMask('l',"Server \2"+servername+"\2 being introduced from \2" + prefix + "\2 denied, already exists. Closing link with " + prefix);
 791                 return false;
 792         }
 793         Link* lnk = Utils->FindLink(servername);
 794         TreeServer* Node = new TreeServer(this->Utils,this->Instance,servername,description,ParentOfThis,NULL, lnk ? lnk->Hidden : false);
 795         ParentOfThis->AddChild(Node);
 796         params[3] = ":" + params[3];
 797         Utils->SetRemoteBursting(Node, true);
 798         Utils->DoOneToAllButSender(prefix,"SERVER",params,prefix);
 799         this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
 800         return true;
 801 }
 802
 803 bool TreeSocket::ComparePass(const std::string &ours, const std::string &theirs)
 804 {
 805         if ((!strncmp(ours.c_str(), "HMAC-SHA256:", 12)) || (!strncmp(theirs.c_str(), "HMAC-SHA256:", 12)))
 806         {
 807                 /* One or both of us specified hmac sha256, but we don't have sha256 module loaded!
 808                  * We can't allow this password as valid.
 809                  */
 810                 if (!Instance->FindModule("m_sha256.so") || !Utils->ChallengeResponse)
 811                                 return false;
 812                 else
 813                         /* Straight string compare of hashes */
 814                         return ours == theirs;
 815         }
 816         else
 817                 /* Straight string compare of plaintext */
 818                 return ours == theirs;
 819 }
 820
 821 bool TreeSocket::Outbound_Reply_Server(std::deque<std::string> &params)
 822 {
 823         if (params.size() < 4)
 824                 return false;
 825
 826         irc::string servername = params[0].c_str();
 827         std::string sname = params[0];
 828         std::string password = params[1];
 829         std::string description = params[3];
 830         int hops = atoi(params[2].c_str());
 831
 832         this->InboundServerName = sname;
 833         this->InboundDescription = description;
 834
 835         if (!sentcapab)
 836                 this->SendCapabilities();
 837
 838         if (hops)
 839         {
 840                 this->SendError("Server too far away for authentication");
 841                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
 842                 return false;
 843         }
 844
 845         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 846         {
 847                 if ((x->Name == servername) && ((ComparePass(this->MakePass(x->RecvPass,this->GetOurChallenge()),password)) || (x->RecvPass == password && (this->GetTheirChallenge().empty()))))
 848                 {
 849                         TreeServer* CheckDupe = Utils->FindServer(sname);
 850                         if (CheckDupe)
 851                         {
 852                                 this->SendError("Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
 853                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
 854                                 return false;
 855                         }
 856                         // Begin the sync here. this kickstarts the
 857                         // other side, waiting in WAIT_AUTH_2 state,
 858                         // into starting their burst, as it shows
 859                         // that we're happy.
 860                         this->LinkState = CONNECTED;
 861                         // we should add the details of this server now
 862                         // to the servers tree, as a child of the root
 863                         // node.
 864                         TreeServer* Node = new TreeServer(this->Utils,this->Instance,sname,description,Utils->TreeRoot,this,x->Hidden);
 865                         Utils->TreeRoot->AddChild(Node);
 866                         params[3] = ":" + params[3];
 867                         Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,sname);
 868                         this->bursting = true;
 869                         this->DoBurst(Node);
 870                         return true;
 871                 }
 872         }
 873         this->SendError("Invalid credentials");
 874         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
 875         return false;
 876 }
 877
 878 bool TreeSocket::Inbound_Server(std::deque<std::string> &params)
 879 {
 880         if (params.size() < 4)
 881                 return false;
 882         irc::string servername = params[0].c_str();
 883         std::string sname = params[0];
 884         std::string password = params[1];
 885         std::string description = params[3];
 886         int hops = atoi(params[2].c_str());
 887
 888         this->InboundServerName = sname;
 889         this->InboundDescription = description;
 890
 891         if (!sentcapab)
 892                 this->SendCapabilities();
 893
 894         if (hops)
 895         {
 896                 this->SendError("Server too far away for authentication");
 897                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
 898                 return false;
 899         }
 900
 901         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 902         {
 903                 if ((x->Name == servername) && ((ComparePass(this->MakePass(x->RecvPass,this->GetOurChallenge()),password) || x->RecvPass == password && (this->GetTheirChallenge().empty()))))
 904                 {
 905                         /* First check for instances of the server that are waiting between the inbound and outbound SERVER command */
 906                         TreeSocket* CheckDupeSocket = Utils->FindBurstingServer(sname);
 907                         if (CheckDupeSocket)
 908                         {
 909                                 /* If we find one, we abort the link to prevent a race condition */
 910                                 this->SendError("Negotiation collision");
 911                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists in a negotiating state.");
 912                                 CheckDupeSocket->SendError("Negotiation collision");
 913                                 Instance->SE->DelFd(CheckDupeSocket);
 914                                 CheckDupeSocket->Close();
 915                                 return false;
 916                         }
 917                         /* Now check for fully initialized instances of the server */
 918                         TreeServer* CheckDupe = Utils->FindServer(sname);
 919                         if (CheckDupe)
 920                         {
 921                                 this->SendError("Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
 922                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
 923                                 return false;
 924                         }
 925                         this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
 926                         if (this->Hook)
 927                         {
 928                                 std::string name = InspSocketNameRequest((Module*)Utils->Creator, this->Hook).Send();
 929                                 this->Instance->SNO->WriteToSnoMask('l',"Connection from \2"+sname+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] using transport \2"+name+"\2");
 930                         }
 931
 932                         Utils->AddBurstingServer(sname,this);
 933
 934                         // this is good. Send our details: Our server name and description and hopcount of 0,
 935                         // along with the sendpass from this block.
 936                         this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+this->MakePass(x->SendPass, this->GetTheirChallenge())+" 0 :"+this->Instance->Config->ServerDesc);
 937                         // move to the next state, we are now waiting for THEM.
 938                         this->LinkState = WAIT_AUTH_2;
 939                         return true;
 940                 }
 941         }
 942         this->SendError("Invalid credentials");
 943         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
 944         return false;
 945 }
 946
 947 void TreeSocket::Split(const std::string &line, std::deque<std::string> &n)
 948 {
 949         n.clear();
 950         irc::tokenstream tokens(line);
 951         std::string param;
 952         while (tokens.GetToken(param))
 953         {
 954                 if (!param.empty())
 955                         n.push_back(param);
 956         }
 957         return;
 958 }
 959
 960 bool TreeSocket::ProcessLine(std::string &line)
 961 {
 962         std::deque<std::string> params;
 963         irc::string command;
 964         std::string prefix;
 965
 966         line = line.substr(0, line.find_first_of("\r\n"));
 967
 968         if (line.empty())
 969                 return true;
 970
 971         Instance->Log(DEBUG, "S[%d] <- %s", this->GetFd(), line.c_str());
 972
 973         this->Split(line.c_str(),params);
 974
 975         if (params.empty())
 976                 return true;
 977
 978         if ((params[0][0] == ':') && (params.size() > 1))
 979         {
 980                 prefix = params[0].substr(1);
 981                 params.pop_front();
 982         }
 983         command = params[0].c_str();
 984         params.pop_front();
 985         switch (this->LinkState)
 986         {
 987                 TreeServer* Node;
 988
 989                 case WAIT_AUTH_1:
 990                         // Waiting for SERVER command from remote server. Server initiating
 991                         // the connection sends the first SERVER command, listening server
 992                         // replies with theirs if its happy, then if the initiator is happy,
 993                         // it starts to send its net sync, which starts the merge, otherwise
 994                         // it sends an ERROR.
 995                         if (command == "PASS")
 996                         {
 997                                 /* Silently ignored */
 998                         }
 999                         else if (command == "SERVER")
1000                         {
1001                                 return this->Inbound_Server(params);
1002                         }
1003                         else if (command == "ERROR")
1004                         {
1005                                 return this->Error(params);
1006                         }
1007                         else if (command == "USER")
1008                         {
1009                                 this->SendError("Client connections to this port are prohibited.");
1010                                 return false;
1011                         }
1012                         else if (command == "CAPAB")
1013                         {
1014                                 return this->Capab(params);
1015                         }
1016                         else if ((command == "U") || (command == "S"))
1017                         {
1018                                 this->SendError("Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
1019                                 return false;
1020                         }
1021                         else
1022                         {
1023                                 irc::string error = "Invalid command in negotiation phase: " + command;
1024                                 this->SendError(assign(error));
1025                                 return false;
1026                         }
1027                 break;
1028                 case WAIT_AUTH_2:
1029                         // Waiting for start of other side's netmerge to say they liked our
1030                         // password.
1031                         if (command == "SERVER")
1032                         {
1033                                 // cant do this, they sent it to us in the WAIT_AUTH_1 state!
1034                                 // silently ignore.
1035                                 return true;
1036                         }
1037                         else if ((command == "U") || (command == "S"))
1038                         {
1039                                 this->SendError("Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
1040                                 return false;
1041                         }
1042                         else if (command == "BURST")
1043                         {
1044                                 if (params.size() && Utils->EnableTimeSync)
1045                                 {
1046                                         bool we_have_delta = (Instance->Time(false) != Instance->Time(true));
1047                                         time_t them = atoi(params[0].c_str());
1048                                         time_t delta = them - Instance->Time(false);
1049                                         if ((delta < -600) || (delta > 600))
1050                                         {
1051                                                 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));
1052                                                 SendError("Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than five minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
1053                                                 return false;
1054                                         }
1055                                         else if ((delta < -30) || (delta > 30))
1056                                         {
1057                                                 Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds. Please consider synching your clocks.", abs(delta));
1058                                         }
1059
1060                                         if (!Utils->MasterTime && !we_have_delta)
1061                                         {
1062                                                 this->Instance->SetTimeDelta(delta);
1063                                                 // Send this new timestamp to any other servers
1064                                                 Utils->DoOneToMany(Utils->TreeRoot->GetName(), "TIMESET", params);
1065                                         }
1066                                 }
1067                                 this->LinkState = CONNECTED;
1068                                 Link* lnk = Utils->FindLink(InboundServerName);
1069                                 Node = new TreeServer(this->Utils,this->Instance, InboundServerName, InboundDescription, Utils->TreeRoot, this, lnk ? lnk->Hidden : false);
1070                                 Utils->DelBurstingServer(this);
1071                                 Utils->TreeRoot->AddChild(Node);
1072                                 params.clear();
1073                                 params.push_back(InboundServerName);
1074                                 params.push_back("*");
1075                                 params.push_back("1");
1076                                 params.push_back(":"+InboundDescription);
1077                                 Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,InboundServerName);
1078                                 this->bursting = true;
1079                                 this->DoBurst(Node);
1080                         }
1081                         else if (command == "ERROR")
1082                         {
1083                                 return this->Error(params);
1084                         }
1085                         else if (command == "CAPAB")
1086                         {
1087                                 return this->Capab(params);
1088                         }
1089
1090                 break;
1091                 case LISTENER:
1092                         this->SendError("Internal error -- listening socket accepted its own descriptor!!!");
1093                         return false;
1094                 break;
1095                 case CONNECTING:
1096                         if (command == "SERVER")
1097                         {
1098                                 // another server we connected to, which was in WAIT_AUTH_1 state,
1099                                 // has just sent us their credentials. If we get this far, theyre
1100                                 // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
1101                                 // if we're happy with this, we should send our netburst which
1102                                 // kickstarts the merge.
1103                                 return this->Outbound_Reply_Server(params);
1104                         }
1105                         else if (command == "ERROR")
1106                         {
1107                                 return this->Error(params);
1108                         }
1109                         else if (command == "CAPAB")
1110                         {
1111                                 return this->Capab(params);
1112                         }
1113                 break;
1114                 case CONNECTED:
1115                         // This is the 'authenticated' state, when all passwords
1116                         // have been exchanged and anything past this point is taken
1117                         // as gospel.
1118
1119                         if (!prefix.empty())
1120                         {
1121                                 std::string direction = prefix;
1122                                 userrec* t = this->Instance->FindNick(prefix);
1123                                 if (t)
1124                                 {
1125                                         direction = t->server;
1126                                 }
1127                                 TreeServer* route_back_again = Utils->BestRouteTo(direction);
1128                                 if ((!route_back_again) || (route_back_again->GetSocket() != this))
1129                                 {
1130                                         if (route_back_again)
1131                                                 Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
1132                                         return true;
1133                                 }
1134                                 /* Fix by brain:
1135                                  * When there is activity on the socket, reset the ping counter so
1136                                  * that we're not wasting bandwidth pinging an active server.
1137                                  */
1138                                 route_back_again->SetNextPingTime(time(NULL) + Utils->PingFreq);
1139                                 route_back_again->SetPingFlag();
1140                         }
1141                         else
1142                         {
1143                                 prefix = this->GetName();
1144                         }
1145
1146                         if ((command == "MODE") && (params.size() >= 2))
1147                         {
1148                                 chanrec* channel = Instance->FindChan(params[0]);
1149                                 if (channel)
1150                                 {
1151                                         userrec* x = Instance->FindNick(prefix);
1152                                         if (x)
1153                                         {
1154                                                 if (warned.find(x->server) == warned.end())
1155                                                 {
1156                                                         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);
1157                                                         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());
1158                                                         warned[x->server] = x->nick;
1159                                                 }
1160                                         }
1161                                 }
1162                         }
1163
1164                         if (command == "SVSMODE")
1165                         {
1166                                 /* Services expects us to implement
1167                                  * SVSMODE. In inspircd its the same as
1168                                  * MODE anyway.
1169                                  */
1170                                 command = "MODE";
1171                         }
1172                         std::string target;
1173                         /* Yes, know, this is a mess. Its reasonably fast though as we're
1174                          * working with std::string here.
1175                          */
1176                         if (command == "UID")
1177                         {
1178                                 return this->ParseUID(prefix, params);
1179                         }
1180                         else if (command == "FJOIN")
1181                         {
1182                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1183                                 if (ServerSource)
1184                                         Utils->SetRemoteBursting(ServerSource, false);
1185                                 return this->ForceJoin(prefix,params);
1186                         }
1187                         else if (command == "STATS")
1188                         {
1189                                 return this->Stats(prefix, params);
1190                         }
1191                         else if (command == "MOTD")
1192                         {
1193                                 return this->Motd(prefix, params);
1194                         }
1195                         else if (command == "KILL" && Utils->IsServer(prefix))
1196                         {
1197                                 return this->RemoteKill(prefix,params);
1198                         }
1199                         else if (command == "MODULES")
1200                         {
1201                                 return this->Modules(prefix, params);
1202                         }
1203                         else if (command == "ADMIN")
1204                         {
1205                                 return this->Admin(prefix, params);
1206                         }
1207                         else if (command == "SERVER")
1208                         {
1209                                 return this->RemoteServer(prefix,params);
1210                         }
1211                         else if (command == "ERROR")
1212                         {
1213                                 return this->Error(params);
1214                         }
1215                         else if (command == "OPERTYPE")
1216                         {
1217                                 return this->OperType(prefix,params);
1218                         }
1219                         else if (command == "FMODE")
1220                         {
1221                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1222                                 if (ServerSource)
1223                                         Utils->SetRemoteBursting(ServerSource, false);
1224                                 return this->ForceMode(prefix,params);
1225                         }
1226                         else if (command == "FTOPIC")
1227                         {
1228                                 return this->ForceTopic(prefix,params);
1229                         }
1230                         else if (command == "REHASH")
1231                         {
1232                                 return this->RemoteRehash(prefix,params);
1233                         }
1234                         else if (command == "METADATA")
1235                         {
1236                                 return this->MetaData(prefix,params);
1237                         }
1238                         else if (command == "REMSTATUS")
1239                         {
1240                                 return this->RemoveStatus(prefix,params);
1241                         }
1242                         else if (command == "PING")
1243                         {
1244                                 if (prefix.empty())
1245                                         prefix = this->GetName();
1246                                 /*
1247                                  * We just got a ping from a server that's bursting.
1248                                  * This can't be right, so set them to not bursting, and
1249                                  * apply their lines.
1250                                  */
1251                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1252                                 if (ServerSource)
1253                                         Utils->SetRemoteBursting(ServerSource, false);
1254
1255                                 if (this->bursting)
1256                                 {
1257                                         this->bursting = false;
1258                                         Instance->XLines->apply_lines(Utils->lines_to_apply);
1259                                         Utils->lines_to_apply = 0;
1260                                 }
1261
1262                                 return this->LocalPing(prefix,params);
1263                         }
1264                         else if (command == "PONG")
1265                         {
1266                                 if (prefix.empty())
1267                                         prefix = this->GetName();
1268                                 /*
1269                                  * We just got a pong from a server that's bursting.
1270                                  * This can't be right, so set them to not bursting, and
1271                                  * apply their lines.
1272                                  */
1273                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1274                                 if (ServerSource)
1275                                         Utils->SetRemoteBursting(ServerSource, false);
1276
1277                                 if (this->bursting)
1278                                 {
1279                                         this->bursting = false;
1280                                         Instance->XLines->apply_lines(Utils->lines_to_apply);
1281                                         Utils->lines_to_apply = 0;
1282                                 }
1283
1284                                 return this->LocalPong(prefix,params);
1285                         }
1286                         else if (command == "VERSION")
1287                         {
1288                                 return this->ServerVersion(prefix,params);
1289                         }
1290                         else if (command == "FHOST")
1291                         {
1292                                 return this->ChangeHost(prefix,params);
1293                         }
1294                         else if (command == "FNAME")
1295                         {
1296                                 return this->ChangeName(prefix,params);
1297                         }
1298                         else if (command == "ADDLINE")
1299                         {
1300                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1301                                 if (ServerSource)
1302                                         Utils->SetRemoteBursting(ServerSource, false);
1303                                 return this->AddLine(prefix,params);
1304                         }
1305                         else if (command == "SVSNICK")
1306                         {
1307                                 if (prefix.empty())
1308                                 {
1309                                         prefix = this->GetName();
1310                                 }
1311                                 return this->ForceNick(prefix,params);
1312                         }
1313                         else if (command == "OPERQUIT")
1314                         {
1315                                 return this->OperQuit(prefix,params);
1316                         }
1317                         else if (command == "IDLE")
1318                         {
1319                                 return this->Whois(prefix,params);
1320                         }
1321                         else if (command == "PUSH")
1322                         {
1323                                 return this->Push(prefix,params);
1324                         }
1325                         else if (command == "TIMESET")
1326                         {
1327                                 return this->HandleSetTime(prefix, params);
1328                         }
1329                         else if (command == "TIME")
1330                         {
1331                                 return this->Time(prefix,params);
1332                         }
1333                         else if ((command == "KICK") && (Utils->IsServer(prefix)))
1334                         {
1335                                 std::string sourceserv = this->myhost;
1336                                 if (params.size() == 3)
1337                                 {
1338                                         userrec* user = this->Instance->FindNick(params[1]);
1339                                         chanrec* chan = this->Instance->FindChan(params[0]);
1340                                         if (user && chan)
1341                                         {
1342                                                 if (!chan->ServerKickUser(user, params[2].c_str(), false))
1343                                                         /* Yikes, the channels gone! */
1344                                                         delete chan;
1345                                         }
1346                                 }
1347                                 if (!this->InboundServerName.empty())
1348                                 {
1349                                         sourceserv = this->InboundServerName;
1350                                 }
1351                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1352                         }
1353                         else if (command == "SVSJOIN")
1354                         {
1355                                 if (prefix.empty())
1356                                 {
1357                                         prefix = this->GetName();
1358                                 }
1359                                 return this->ServiceJoin(prefix,params);
1360                         }
1361                         else if (command == "SQUIT")
1362                         {
1363                                 if (params.size() == 2)
1364                                 {
1365                                         this->Squit(Utils->FindServer(params[0]),params[1]);
1366                                 }
1367                                 return true;
1368                         }
1369                         else if (command == "OPERNOTICE")
1370                         {
1371                                 std::string sourceserv = this->myhost;
1372                                 if (!this->InboundServerName.empty())
1373                                         sourceserv = this->InboundServerName;
1374                                 if (params.size() >= 1)
1375                                         Instance->WriteOpers("*** From " + sourceserv + ": " + params[0]);
1376                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1377                         }
1378                         else if (command == "MODENOTICE")
1379                         {
1380                                 std::string sourceserv = this->myhost;
1381                                 if (!this->InboundServerName.empty())
1382                                         sourceserv = this->InboundServerName;
1383                                 if (params.size() >= 2)
1384                                 {
1385                                         Instance->WriteMode(params[0].c_str(), WM_AND, "*** From %s: %s", sourceserv.c_str(), params[1].c_str());
1386                                 }
1387                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1388                         }
1389                         else if (command == "SNONOTICE")
1390                         {
1391                                 std::string sourceserv = this->myhost;
1392                                 if (!this->InboundServerName.empty())
1393                                         sourceserv = this->InboundServerName;
1394                                 if (params.size() >= 2)
1395                                 {
1396                                         Instance->SNO->WriteToSnoMask(*(params[0].c_str()), "From " + sourceserv + ": "+ params[1]);
1397                                 }
1398                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1399                         }
1400                         else if (command == "ENDBURST")
1401                         {
1402                                 this->bursting = false;
1403                                 Instance->XLines->apply_lines(Utils->lines_to_apply);
1404                                 Utils->lines_to_apply = 0;
1405                                 std::string sourceserv = this->myhost;
1406                                 if (!this->InboundServerName.empty())
1407                                         sourceserv = this->InboundServerName;
1408                                 this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
1409
1410                                 Event rmode((char*)sourceserv.c_str(), (Module*)Utils->Creator, "new_server");
1411                                 rmode.Send(Instance);
1412
1413                                 return true;
1414                         }
1415                         else
1416                         {
1417                                 /*
1418                                  * Not a special s2s command. Emulate the user doing it.
1419                                  * This saves us having a huge ugly command parser again.
1420                                  */
1421
1422
1423                                 /*
1424                                  *
1425                                  * First, let's find them by UID. If we don't find, try again
1426                                  * by nick (to catch legacy commands temporarily).
1427                                  * If we still don't .. carry on and pray. -- w00t
1428                                  */
1429                                 userrec *who = this->Instance->FindUUID(prefix);
1430
1431                                 if (!who)
1432                                 {
1433                                         userrec* who = this->Instance->FindNick(prefix);
1434
1435                                         if (who)
1436                                         {
1437                                                 Instance->Log(DEBUG, "Glark! I got a legacy command!");
1438                                         }
1439                                 }
1440
1441                                 std::string sourceserv = this->myhost;
1442                                 if (!this->InboundServerName.empty())
1443                                 {
1444                                         sourceserv = this->InboundServerName;
1445                                 }
1446                                 if ((!who) && (command == "MODE"))
1447                                 {
1448                                         if (Utils->IsServer(prefix))
1449                                         {
1450                                                 const char* modelist[MAXPARAMETERS];
1451                                                 for (size_t i = 0; i < params.size(); i++)
1452                                                         modelist[i] = params[i].c_str();
1453                                                 userrec* fake = new userrec(Instance);
1454                                                 fake->SetFd(FD_MAGIC_NUMBER);
1455                                                 this->Instance->SendMode(modelist, params.size(), fake);
1456
1457                                                 delete fake;
1458                                                 /* Hot potato! pass it on! */
1459                                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1460                                         }
1461                                 }
1462                                 if (who)
1463                                 {
1464                                         if ((command == "NICK") && (params.size() > 0))
1465                                         {
1466                                                 /* On nick messages, check that the nick doesnt
1467                                                  * already exist here. If it does, kill their copy,
1468                                                  * and our copy.
1469                                                  */
1470                                                 userrec* x = this->Instance->FindNick(params[0]);
1471                                                 if ((x) && (x != who))
1472                                                 {
1473                                                         std::deque<std::string> p;
1474                                                         p.push_back(params[0]);
1475                                                         p.push_back(":Nickname collision ("+prefix+" -> "+params[0]+")");
1476                                                         Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
1477                                                         p.clear();
1478                                                         p.push_back(prefix);
1479                                                         p.push_back(":Nickname collision");
1480                                                         Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
1481                                                         userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
1482                                                         userrec* y = this->Instance->FindNick(prefix);
1483                                                         if (y)
1484                                                         {
1485                                                                 userrec::QuitUser(this->Instance,y,"Nickname collision");
1486                                                         }
1487                                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1488                                                 }
1489                                         }
1490                                         // its a user
1491                                         target = who->server;
1492                                         const char* strparams[127];
1493                                         for (unsigned int q = 0; q < params.size(); q++)
1494                                         {
1495                                                 strparams[q] = params[q].c_str();
1496                                         }
1497                                         switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
1498                                         {
1499                                                 case CMD_INVALID:
1500                                                         this->SendError("Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
1501                                                         return false;
1502                                                 break;
1503                                                 case CMD_FAILURE:
1504                                                         return true;
1505                                                 break;
1506                                                 default:
1507                                                         /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
1508                                                 break;
1509                                         }
1510                                 }
1511                                 else
1512                                 {
1513                                         // its not a user. Its either a server, or somethings screwed up.
1514                                         if (Utils->IsServer(prefix))
1515                                                 target = this->Instance->Config->ServerName;
1516                                         else
1517                                                 return true;
1518                                 }
1519                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1520
1521                         }
1522                         return true;
1523                 break;
1524         }
1525         return true;
1526 }
1527
1528 std::string TreeSocket::GetName()
1529 {
1530         std::string sourceserv = this->myhost;
1531         if (!this->InboundServerName.empty())
1532         {
1533                 sourceserv = this->InboundServerName;
1534         }
1535         return sourceserv;
1536 }
1537
1538 void TreeSocket::OnTimeout()
1539 {
1540         if (this->LinkState == CONNECTING)
1541         {
1542                 Utils->Creator->RemoteMessage(NULL, "CONNECT: Connection to \002%s\002 timed out.", myhost.c_str());
1543                 Link* MyLink = Utils->FindLink(myhost);
1544                 if (MyLink)
1545                         Utils->DoFailOver(MyLink);
1546         }
1547 }
1548
1549 void TreeSocket::OnClose()
1550 {
1551         if (this->LinkState == LISTENER)
1552                 return;
1553
1554         // Connection closed.
1555         // If the connection is fully up (state CONNECTED)
1556         // then propogate a netsplit to all peers.
1557         std::string quitserver = this->myhost;
1558         if (!this->InboundServerName.empty())
1559         {
1560                 quitserver = this->InboundServerName;
1561         }
1562         TreeServer* s = Utils->FindServer(quitserver);
1563         if (s)
1564         {
1565                 Squit(s,"Remote host closed the connection");
1566         }
1567
1568         if (!quitserver.empty())
1569         {
1570                 Utils->Creator->RemoteMessage(NULL,"Connection to '\2%s\2' failed.",quitserver.c_str());
1571                 time_t server_uptime = Instance->Time() - this->age;
1572                 if (server_uptime)
1573                         Utils->Creator->RemoteMessage(NULL,"Connection to '\2%s\2' was established for %s", quitserver.c_str(), Utils->Creator->TimeToStr(server_uptime).c_str());
1574         }
1575 }
1576
1577 int TreeSocket::OnIncomingConnection(int newsock, char* ip)
1578 {
1579         /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
1580          * or discovering if this port is the server port, we don't allow connections from any
1581          * IPs for which we don't have a link block.
1582          */
1583         bool found = false;
1584
1585         found = (std::find(Utils->ValidIPs.begin(), Utils->ValidIPs.end(), ip) != Utils->ValidIPs.end());
1586         if (!found)
1587         {
1588                 for (vector<std::string>::iterator i = Utils->ValidIPs.begin(); i != Utils->ValidIPs.end(); i++)
1589                         if (irc::sockets::MatchCIDR(ip, (*i).c_str()))
1590                                 found = true;
1591
1592                 if (!found)
1593                 {
1594                         Utils->Creator->RemoteMessage(NULL,"Server connection from %s denied (no link blocks with that IP address)", ip);
1595                         close(newsock);
1596                         return false;
1597                 }
1598         }
1599
1600         TreeSocket* s = new TreeSocket(this->Utils, this->Instance, newsock, ip, this->Hook);
1601         s = s; /* Whinge whinge whinge, thats all GCC ever does. */
1602         return true;
1603 }