src/modules/m_spanningtree/treesocket2.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15 #include "commands/cmd_whois.h"
  16 #include "commands/cmd_stats.h"
  17 #include "socket.h"
  18 #include "wildcard.h"
  19 #include "xline.h"
  20 #include "transport.h"
  21 #include "socketengine.h"
  22
  23 #include "m_spanningtree/main.h"
  24 #include "m_spanningtree/utils.h"
  25 #include "m_spanningtree/treeserver.h"
  26 #include "m_spanningtree/link.h"
  27 #include "m_spanningtree/treesocket.h"
  28 #include "m_spanningtree/resolvers.h"
  29 #include "m_spanningtree/handshaketimer.h"
  30
  31 /* $ModDep: m_spanningtree/timesynctimer.h m_spanningtree/resolvers.h m_spanningtree/main.h m_spanningtree/utils.h m_spanningtree/treeserver.h m_spanningtree/link.h m_spanningtree/treesocket.h */
  32
  33 static std::map<std::string, std::string> warned;       /* Server names that have had protocol violation warnings displayed for them */
  34
  35 int TreeSocket::WriteLine(std::string line)
  36 {
  37         Instance->Log(DEBUG, "S[%d] O %s", this->GetFd(), line.c_str());
  38         line.append("\r\n");
  39         return this->Write(line);
  40 }
  41
  42
  43 /* Handle ERROR command */
  44 bool TreeSocket::Error(std::deque<std::string> &params)
  45 {
  46         if (params.size() < 1)
  47                 return false;
  48         this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(!InboundServerName.empty() ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
  49         /* we will return false to cause the socket to close. */
  50         return false;
  51 }
  52
  53 bool TreeSocket::Modules(const std::string &prefix, std::deque<std::string> &params)
  54 {
  55         if (params.empty())
  56                 return true;
  57
  58         if (!this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
  59         {
  60                 /* Pass it on, not for us */
  61                 Utils->DoOneToOne(prefix, "MODULES", params, params[0]);
  62                 return true;
  63         }
  64
  65         char strbuf[MAXBUF];
  66         std::deque<std::string> par;
  67         par.push_back(prefix);
  68         par.push_back("");
  69
  70         User* source = this->Instance->FindNick(prefix);
  71         if (!source)
  72                 return true;
  73
  74         for (unsigned int i = 0; i < Instance->Config->module_names.size(); i++)
  75         {
  76                 Version V = Instance->Modules->modules[i]->GetVersion();
  77                 char modulename[MAXBUF];
  78                 char flagstate[MAXBUF];
  79                 *flagstate = 0;
  80                 if (V.Flags & VF_STATIC)
  81                         strlcat(flagstate,", static",MAXBUF);
  82                 if (V.Flags & VF_VENDOR)
  83                         strlcat(flagstate,", vendor",MAXBUF);
  84                 if (V.Flags & VF_COMMON)
  85                         strlcat(flagstate,", common",MAXBUF);
  86                 if (V.Flags & VF_SERVICEPROVIDER)
  87                         strlcat(flagstate,", service provider",MAXBUF);
  88                 if (!flagstate[0])
  89                         strcpy(flagstate,"  <no flags>");
  90                 strlcpy(modulename,Instance->Config->module_names[i].c_str(),256);
  91                 if (*source->oper)
  92                 {
  93                         snprintf(strbuf, MAXBUF, "::%s 900 %s :0x%08lx %d.%d.%d.%d %s (%s)",Instance->Config->ServerName,source->nick,(long unsigned int)Instance->Modules->modules[i],V.Major,V.Minor,V.Revision,V.Build,ServerConfig::CleanFilename(modulename),flagstate+2);
  94                 }
  95                 else
  96                 {
  97                         snprintf(strbuf, MAXBUF, "::%s 900 %s :%s",Instance->Config->ServerName,source->nick,ServerConfig::CleanFilename(modulename));
  98                 }
  99                 par[1] = strbuf;
 100                 Utils->DoOneToOne(Instance->Config->GetSID(), "PUSH", par, source->server);
 101         }
 102         snprintf(strbuf, MAXBUF, "::%s 901 %s :End of MODULES list", Instance->Config->ServerName, source->nick);
 103         par[1] = strbuf;
 104         Utils->DoOneToOne(Instance->Config->GetSID(), "PUSH", par, source->server);
 105         return true;
 106 }
 107
 108 /** remote MOTD. leet, huh? */
 109 bool TreeSocket::Motd(const std::string &prefix, std::deque<std::string> &params)
 110 {
 111         if (params.size() > 0)
 112         {
 113                 if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
 114                 {
 115                         /* It's for our server */
 116                         string_list results;
 117                         User* source = this->Instance->FindNick(prefix);
 118
 119                         if (source)
 120                         {
 121                                 std::deque<std::string> par;
 122                                 par.push_back(prefix);
 123                                 par.push_back("");
 124
 125                                 if (!Instance->Config->MOTD.size())
 126                                 {
 127                                         par[1] = std::string("::")+Instance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
 128                                         Utils->DoOneToOne(this->Instance->Config->GetSID(), "PUSH",par, source->server);
 129                                         return true;
 130                                 }
 131
 132                                 par[1] = std::string("::")+Instance->Config->ServerName+" 375 "+source->nick+" :"+Instance->Config->ServerName+" message of the day";
 133                                 Utils->DoOneToOne(this->Instance->Config->GetSID(), "PUSH",par, source->server);
 134
 135                                 for (unsigned int i = 0; i < Instance->Config->MOTD.size(); i++)
 136                                 {
 137                                         par[1] = std::string("::")+Instance->Config->ServerName+" 372 "+source->nick+" :- "+Instance->Config->MOTD[i];
 138                                         Utils->DoOneToOne(this->Instance->Config->GetSID(), "PUSH",par, source->server);
 139                                 }
 140
 141                                 par[1] = std::string("::")+Instance->Config->ServerName+" 376 "+source->nick+" :End of message of the day.";
 142                                 Utils->DoOneToOne(this->Instance->Config->GetSID(), "PUSH",par, source->server);
 143                         }
 144                 }
 145                 else
 146                 {
 147                         /* Pass it on */
 148                         User* source = this->Instance->FindNick(prefix);
 149                         if (source)
 150                                 Utils->DoOneToOne(prefix, "MOTD", params, params[0]);
 151                 }
 152         }
 153         return true;
 154 }
 155
 156 /** remote ADMIN. leet, huh? */
 157 bool TreeSocket::Admin(const std::string &prefix, std::deque<std::string> &params)
 158 {
 159         if (params.size() > 0)
 160         {
 161                 if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
 162                 {
 163                         /* It's for our server */
 164                         string_list results;
 165                         User* source = this->Instance->FindNick(prefix);
 166                         if (source)
 167                         {
 168                                 std::deque<std::string> par;
 169                                 par.push_back(prefix);
 170                                 par.push_back("");
 171                                 par[1] = std::string("::")+Instance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+Instance->Config->ServerName;
 172                                 Utils->DoOneToOne(this->Instance->Config->GetSID(), "PUSH",par, source->server);
 173                                 par[1] = std::string("::")+Instance->Config->ServerName+" 257 "+source->nick+" :Name     - "+Instance->Config->AdminName;
 174                                 Utils->DoOneToOne(this->Instance->Config->GetSID(), "PUSH",par, source->server);
 175                                 par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+Instance->Config->AdminNick;
 176                                 Utils->DoOneToOne(this->Instance->Config->GetSID(), "PUSH",par, source->server);
 177                                 par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+Instance->Config->AdminEmail;
 178                                 Utils->DoOneToOne(this->Instance->Config->GetSID(), "PUSH",par, source->server);
 179                         }
 180                 }
 181                 else
 182                 {
 183                         /* Pass it on */
 184                         User* source = this->Instance->FindNick(prefix);
 185                         if (source)
 186                                 Utils->DoOneToOne(prefix, "ADMIN", params, params[0]);
 187                 }
 188         }
 189         return true;
 190 }
 191
 192 bool TreeSocket::Stats(const std::string &prefix, std::deque<std::string> &params)
 193 {
 194         /* Get the reply to a STATS query if it matches this servername,
 195          * and send it back as a load of PUSH queries
 196          */
 197         if (params.size() > 1)
 198         {
 199                 if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
 200                 {
 201                         /* It's for our server */
 202                         string_list results;
 203                         User* source = this->Instance->FindNick(prefix);
 204                         if (source)
 205                         {
 206                                 std::deque<std::string> par;
 207                                 par.push_back(prefix);
 208                                 par.push_back("");
 209                                 DoStats(this->Instance, *(params[0].c_str()), source, results);
 210                                 for (size_t i = 0; i < results.size(); i++)
 211                                 {
 212                                         par[1] = "::" + results[i];
 213                                         Utils->DoOneToOne(this->Instance->Config->GetSID(), "PUSH",par, source->server);
 214                                 }
 215                         }
 216                 }
 217                 else
 218                 {
 219                         /* Pass it on */
 220                         User* source = this->Instance->FindNick(prefix);
 221                         if (source)
 222                                 Utils->DoOneToOne(source->uuid, "STATS", params, params[1]);
 223                 }
 224         }
 225         return true;
 226 }
 227
 228
 229 /** Because the core won't let users or even SERVERS set +o,
 230  * we use the OPERTYPE command to do this.
 231  */
 232 bool TreeSocket::OperType(const std::string &prefix, std::deque<std::string> &params)
 233 {
 234         if (params.size() != 1)
 235                 return true;
 236         std::string opertype = params[0];
 237         User* u = this->Instance->FindNick(prefix);
 238         if (u)
 239         {
 240                 if (!u->IsModeSet('o'))
 241                         this->Instance->all_opers.push_back(u);
 242                 u->modes[UM_OPERATOR] = 1;
 243                 strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
 244                 Utils->DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
 245
 246                 TreeServer* remoteserver = Utils->FindServer(u->server);
 247                 bool dosend = true;
 248
 249                 if (this->Utils->quiet_bursts)
 250                 {
 251                         /*
 252                          * If quiet bursts are enabled, and server is bursting or silent uline (i.e. services),
 253                          * then do nothing. -- w00t
 254                          */
 255                         if (
 256                                 this->bursting ||
 257                                 Utils->FindRemoteBurstServer(remoteserver) ||
 258                                 this->Instance->SilentULine(this->Instance->FindServerNamePtr(u->server))
 259                            )
 260                         {
 261                                 dosend = false;
 262                         }
 263                 }
 264
 265                 if (dosend)
 266                         this->Instance->SNO->WriteToSnoMask('o',"From %s: User %s (%s@%s) is now an IRC operator of type %s",u->server, u->nick,u->ident,u->host,irc::Spacify(opertype.c_str()));
 267         }
 268         return true;
 269 }
 270
 271 /** Because Andy insists that services-compatible servers must
 272  * implement SVSNICK and SVSJOIN, that's exactly what we do :p
 273  */
 274 bool TreeSocket::ForceNick(const std::string &prefix, std::deque<std::string> &params)
 275 {
 276         if (params.size() < 3)
 277                 return true;
 278
 279         User* u = this->Instance->FindNick(params[0]);
 280
 281         if (u)
 282         {
 283                 Utils->DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
 284
 285                 if (IS_LOCAL(u))
 286                 {
 287                         std::deque<std::string> par;
 288                         par.push_back(params[1]);
 289
 290                         if (!u->ForceNickChange(params[1].c_str()))
 291                         {
 292                                 /* buh. UID them */
 293                                 if (!u->ForceNickChange(u->uuid))
 294                                 {
 295                                         User::QuitUser(this->Instance, u, "Nickname collision");
 296                                         return true;
 297                                 }
 298                         }
 299
 300                         u->age = atoi(params[2].c_str());
 301                 }
 302         }
 303
 304         return true;
 305 }
 306
 307 bool TreeSocket::OperQuit(const std::string &prefix, std::deque<std::string> &params)
 308 {
 309         if (params.size() < 1)
 310                 return true;
 311
 312         User* u = this->Instance->FindNick(prefix);
 313
 314         if (u)
 315         {
 316                 u->SetOperQuit(params[0]);
 317                 params[0] = ":" + params[0];
 318                 Utils->DoOneToAllButSender(prefix,"OPERQUIT",params,prefix);
 319         }
 320         return true;
 321 }
 322
 323 bool TreeSocket::ServiceJoin(const std::string &prefix, std::deque<std::string> &params)
 324 {
 325         if (params.size() < 2)
 326                 return true;
 327
 328         if (!this->Instance->IsChannel(params[1].c_str()))
 329                 return true;
 330
 331         User* u = this->Instance->FindNick(params[0]);
 332
 333         if (u)
 334         {
 335                 /* only join if it's local, otherwise just pass it on! */
 336                 if (IS_LOCAL(u))
 337                         Channel::JoinUser(this->Instance, u, params[1].c_str(), false, "", Instance->Time());
 338                 Utils->DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
 339         }
 340         return true;
 341 }
 342
 343 bool TreeSocket::ServicePart(const std::string &prefix, std::deque<std::string> &params)
 344 {
 345         if (params.size() < 2)
 346                 return true;
 347
 348         if (!this->Instance->IsChannel(params[1].c_str()))
 349                 return true;
 350
 351         User* u = this->Instance->FindNick(params[0]);
 352         Channel* c = this->Instance->FindChan(params[1]);
 353
 354         if (u)
 355         {
 356                 /* only part if it's local, otherwise just pass it on! */
 357                 if (IS_LOCAL(u))
 358                         if (!c->PartUser(u, "Services forced part"))
 359                                 delete c;
 360                 Utils->DoOneToAllButSender(prefix,"SVSPART",params,prefix);
 361         }
 362
 363         return true;
 364 }
 365
 366 bool TreeSocket::RemoteRehash(const std::string &prefix, std::deque<std::string> &params)
 367 {
 368         if (params.size() < 1)
 369                 return false;
 370
 371         std::string servermask = params[0];
 372
 373         if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
 374         {
 375                 this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated by \002"+prefix+"\002.");
 376                 this->Instance->RehashServer();
 377                 Utils->ReadConfiguration(false);
 378                 InitializeDisabledCommands(Instance->Config->DisabledCommands, Instance);
 379         }
 380         Utils->DoOneToAllButSender(prefix,"REHASH",params,prefix);
 381         return true;
 382 }
 383
 384 bool TreeSocket::RemoteKill(const std::string &prefix, std::deque<std::string> &params)
 385 {
 386         if (params.size() != 2)
 387                 return true;
 388
 389         User* who = this->Instance->FindNick(params[0]);
 390
 391         if (who)
 392         {
 393                 /* Prepend kill source, if we don't have one */
 394                 if (*(params[1].c_str()) != '[')
 395                 {
 396                         params[1] = "[" + prefix + "] Killed (" + params[1] +")";
 397                 }
 398                 std::string reason = params[1];
 399                 params[1] = ":" + params[1];
 400                 Utils->DoOneToAllButSender(prefix,"KILL",params,prefix);
 401                 // NOTE: This is safe with kill hiding on, as RemoteKill is only reached if we have a server prefix.
 402                 // in short this is not executed for USERS.
 403                 who->Write(":%s KILL %s :%s (%s)", prefix.c_str(), who->nick, prefix.c_str(), reason.c_str());
 404                 User::QuitUser(this->Instance,who,reason);
 405         }
 406         return true;
 407 }
 408
 409 bool TreeSocket::LocalPong(const std::string &prefix, std::deque<std::string> &params)
 410 {
 411         if (params.size() < 1)
 412                 return true;
 413
 414         if (params.size() == 1)
 415         {
 416                 TreeServer* ServerSource = Utils->FindServer(prefix);
 417                 if (ServerSource)
 418                 {
 419                         ServerSource->SetPingFlag();
 420                         timeval t;
 421                         gettimeofday(&t, NULL);
 422                         long ts = (t.tv_sec * 1000) + (t.tv_usec / 1000);
 423                         ServerSource->rtt = ts - ServerSource->LastPingMsec;
 424                 }
 425         }
 426         else
 427         {
 428                 std::string forwardto = params[1];
 429                 if (forwardto == Instance->Config->GetSID() || forwardto == Instance->Config->ServerName)
 430                 {
 431                         /*
 432                          * this is a PONG for us
 433                          * if the prefix is a user, check theyre local, and if they are,
 434                          * dump the PONG reply back to their fd. If its a server, do nowt.
 435                          * Services might want to send these s->s, but we dont need to yet.
 436                          */
 437                         User* u = this->Instance->FindNick(prefix);
 438                         if (u)
 439                         {
 440                                 u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
 441                         }
 442                 }
 443                 else
 444                 {
 445                         // not for us, pass it on :)
 446                         Utils->DoOneToOne(prefix,"PONG",params,forwardto);
 447                 }
 448         }
 449
 450         return true;
 451 }
 452
 453 bool TreeSocket::MetaData(const std::string &prefix, std::deque<std::string> &params)
 454 {
 455         if (params.size() < 2)
 456                 return true;
 457         else if (params.size() < 3)
 458                 params.push_back("");
 459         TreeServer* ServerSource = Utils->FindServer(prefix);
 460         if (ServerSource)
 461         {
 462                 Utils->SetRemoteBursting(ServerSource, false);
 463
 464                 if (params[0] == "*")
 465                 {
 466                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
 467                 }
 468                 else if (*(params[0].c_str()) == '#')
 469                 {
 470                         Channel* c = this->Instance->FindChan(params[0]);
 471                         if (c)
 472                         {
 473                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
 474                         }
 475                 }
 476                 else if (*(params[0].c_str()) != '#')
 477                 {
 478                         User* u = this->Instance->FindNick(params[0]);
 479                         if (u)
 480                         {
 481                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
 482                         }
 483                 }
 484         }
 485
 486         params[2] = ":" + params[2];
 487         Utils->DoOneToAllButSender(prefix,"METADATA",params,prefix);
 488         return true;
 489 }
 490
 491 bool TreeSocket::ServerVersion(const std::string &prefix, std::deque<std::string> &params)
 492 {
 493         if (params.size() < 1)
 494                 return true;
 495
 496         TreeServer* ServerSource = Utils->FindServer(prefix);
 497
 498         if (ServerSource)
 499         {
 500                 ServerSource->SetVersion(params[0]);
 501         }
 502         params[0] = ":" + params[0];
 503         Utils->DoOneToAllButSender(prefix,"VERSION",params,prefix);
 504         return true;
 505 }
 506
 507 bool TreeSocket::ChangeHost(const std::string &prefix, std::deque<std::string> &params)
 508 {
 509         if (params.size() < 1)
 510                 return true;
 511         User* u = this->Instance->FindNick(prefix);
 512
 513         if (u)
 514         {
 515                 u->ChangeDisplayedHost(params[0].c_str());
 516                 Utils->DoOneToAllButSender(prefix,"FHOST",params,u->server);
 517         }
 518         return true;
 519 }
 520
 521 bool TreeSocket::AddLine(const std::string &prefix, std::deque<std::string> &params)
 522 {
 523         if (params.size() < 6)
 524                 return true;
 525
 526         XLineFactory* xlf = Instance->XLines->GetFactory(params[0][0]);
 527
 528         if (!xlf)
 529                 return false;
 530
 531         XLine* xl = xlf->Generate(Instance->Time(), atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 532         xl->SetCreateTime(atoi(params[3].c_str()));
 533         if (Instance->XLines->AddLine(xl,NULL))
 534         {
 535                 if (xl->expiry)
 536                 {
 537                         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(xl->expiry).c_str(),params[5].c_str());
 538                 }
 539                 else
 540                 {
 541                         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());
 542                 }
 543                 params[5] = ":" + params[5];
 544                 Utils->DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
 545         }
 546         else
 547                 delete xl;
 548
 549         if (!this->bursting)
 550         {
 551                 Instance->XLines->ApplyLines();
 552         }
 553
 554         return true;
 555 }
 556
 557 bool TreeSocket::ChangeName(const std::string &prefix, std::deque<std::string> &params)
 558 {
 559         if (params.size() < 1)
 560                 return true;
 561         User* u = this->Instance->FindNick(prefix);
 562         if (u)
 563         {
 564                 u->ChangeName(params[0].c_str());
 565                 params[0] = ":" + params[0];
 566                 Utils->DoOneToAllButSender(prefix,"FNAME",params,u->server);
 567         }
 568         return true;
 569 }
 570
 571 bool TreeSocket::Whois(const std::string &prefix, std::deque<std::string> &params)
 572 {
 573         if (params.size() < 1)
 574                 return true;
 575         User* u = this->Instance->FindNick(prefix);
 576         if (u)
 577         {
 578                 // an incoming request
 579                 if (params.size() == 1)
 580                 {
 581                         User* x = this->Instance->FindNick(params[0]);
 582                         if ((x) && (IS_LOCAL(x)))
 583                         {
 584                                 User* x = this->Instance->FindNick(params[0]);
 585                                 char signon[MAXBUF];
 586                                 char idle[MAXBUF];
 587                                 snprintf(signon, MAXBUF, "%lu", (unsigned long)x->signon);
 588                                 snprintf(idle, MAXBUF, "%lu", (unsigned long)abs((x->idle_lastmsg) - Instance->Time(true)));
 589                                 std::deque<std::string> par;
 590                                 par.push_back(prefix);
 591                                 par.push_back(signon);
 592                                 par.push_back(idle);
 593                                 // ours, we're done, pass it BACK
 594                                 Utils->DoOneToOne(params[0], "IDLE", par, u->server);
 595                         }
 596                         else
 597                         {
 598                                 // not ours pass it on
 599                                 if (x)
 600                                         Utils->DoOneToOne(prefix, "IDLE", params, x->server);
 601                         }
 602                 }
 603                 else if (params.size() == 3)
 604                 {
 605                         std::string who_did_the_whois = params[0];
 606                         User* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
 607                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
 608                         {
 609                                 // an incoming reply to a whois we sent out
 610                                 std::string nick_whoised = prefix;
 611                                 unsigned long signon = atoi(params[1].c_str());
 612                                 unsigned long idle = atoi(params[2].c_str());
 613                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
 614                                 {
 615                                         do_whois(this->Instance, who_to_send_to, u, signon, idle, nick_whoised.c_str());
 616                                 }
 617                         }
 618                         else
 619                         {
 620                                 // not ours, pass it on
 621                                 if (who_to_send_to)
 622                                         Utils->DoOneToOne(prefix, "IDLE", params, who_to_send_to->server);
 623                         }
 624                 }
 625         }
 626         return true;
 627 }
 628
 629 bool TreeSocket::Push(const std::string &prefix, std::deque<std::string> &params)
 630 {
 631         if (params.size() < 2)
 632                 return true;
 633         User* u = this->Instance->FindNick(params[0]);
 634         if (!u)
 635                 return true;
 636         if (IS_LOCAL(u))
 637         {
 638                 u->Write(params[1]);
 639         }
 640         else
 641         {
 642                 // continue the raw onwards
 643                 params[1] = ":" + params[1];
 644                 Utils->DoOneToOne(prefix,"PUSH",params,u->server);
 645         }
 646         return true;
 647 }
 648
 649 bool TreeSocket::HandleSetTime(const std::string &prefix, std::deque<std::string> &params)
 650 {
 651         if (!params.size() || !Utils->EnableTimeSync)
 652                 return true;
 653
 654         bool force = false;
 655
 656         if ((params.size() == 2) && (params[1] == "FORCE"))
 657                 force = true;
 658
 659         time_t them = atoi(params[0].c_str());
 660         time_t us = Instance->Time(false);
 661
 662         time_t diff = them - us;
 663
 664         Utils->DoOneToAllButSender(prefix, "TIMESET", params, prefix);
 665
 666         if (force || (them != us))
 667         {
 668                 time_t old = Instance->SetTimeDelta(diff);
 669                 Instance->Log(DEBUG, "TS (diff %d) from %s applied (old delta was %d)", diff, prefix.c_str(), old);
 670         }
 671
 672         return true;
 673 }
 674
 675 bool TreeSocket::Time(const std::string &prefix, std::deque<std::string> &params)
 676 {
 677         // :source.server TIME remote.server sendernick
 678         // :remote.server TIME source.server sendernick TS
 679         if (params.size() == 2)
 680         {
 681                 // someone querying our time?
 682                 if (this->Instance->Config->ServerName == params[0] || this->Instance->Config->GetSID() == params[0])
 683                 {
 684                         User* u = this->Instance->FindNick(params[1]);
 685                         if (u)
 686                         {
 687                                 params.push_back(ConvToStr(Instance->Time(false)));
 688                                 params[0] = prefix;
 689                                 Utils->DoOneToOne(this->Instance->Config->GetSID(),"TIME",params,params[0]);
 690                         }
 691                 }
 692                 else
 693                 {
 694                         // not us, pass it on
 695                         User* u = this->Instance->FindNick(params[1]);
 696                         if (u)
 697                                 Utils->DoOneToOne(prefix,"TIME",params,params[0]);
 698                 }
 699         }
 700         else if (params.size() == 3)
 701         {
 702                 // a response to a previous TIME
 703                 User* u = this->Instance->FindNick(params[1]);
 704                 if ((u) && (IS_LOCAL(u)))
 705                 {
 706                         time_t rawtime = atol(params[2].c_str());
 707                         struct tm * timeinfo;
 708                         timeinfo = localtime(&rawtime);
 709                         char tms[26];
 710                         snprintf(tms,26,"%s",asctime(timeinfo));
 711                         tms[24] = 0;
 712                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
 713                 }
 714                 else
 715                 {
 716                         if (u)
 717                                 Utils->DoOneToOne(prefix,"TIME",params,u->server);
 718                 }
 719         }
 720         return true;
 721 }
 722
 723 bool TreeSocket::LocalPing(const std::string &prefix, std::deque<std::string> &params)
 724 {
 725         if (params.size() < 1)
 726                 return true;
 727         if (params.size() == 1)
 728         {
 729                 std::string stufftobounce = params[0];
 730                 this->WriteLine(std::string(":")+this->Instance->Config->GetSID()+" PONG "+stufftobounce);
 731                 return true;
 732         }
 733         else
 734         {
 735                 std::string forwardto = params[1];
 736                 if (forwardto == this->Instance->Config->ServerName || forwardto == this->Instance->Config->GetSID())
 737                 {
 738                         // this is a ping for us, send back PONG to the requesting server
 739                         params[1] = params[0];
 740                         params[0] = forwardto;
 741                         Utils->DoOneToOne(forwardto,"PONG",params,params[1]);
 742                 }
 743                 else
 744                 {
 745                         // not for us, pass it on :)
 746                         Utils->DoOneToOne(prefix,"PING",params,forwardto);
 747                 }
 748                 return true;
 749         }
 750 }
 751
 752 /** TODO: This creates a total mess of output and needs to really use irc::modestacker.
 753  */
 754 bool TreeSocket::RemoveStatus(const std::string &prefix, std::deque<std::string> &params)
 755 {
 756         if (params.size() < 1)
 757                 return true;
 758         Channel* c = Instance->FindChan(params[0]);
 759         if (c)
 760         {
 761                 for (char modeletter = 'A'; modeletter <= 'z'; modeletter++)
 762                 {
 763                         ModeHandler* mh = Instance->Modes->FindMode(modeletter, MODETYPE_CHANNEL);
 764                         if (mh)
 765                                 mh->RemoveMode(c);
 766                 }
 767         }
 768         return true;
 769 }
 770
 771 bool TreeSocket::RemoteServer(const std::string &prefix, std::deque<std::string> &params)
 772 {
 773         if (params.size() < 5)
 774         {
 775                 SendError("Protocol error - Missing SID");
 776                 return false;
 777         }
 778
 779         std::string servername = params[0];
 780         std::string password = params[1];
 781         // hopcount is not used for a remote server, we calculate this ourselves
 782         std::string sid = params[3];
 783         std::string description = params[4];
 784         TreeServer* ParentOfThis = Utils->FindServer(prefix);
 785         if (!ParentOfThis)
 786         {
 787                 this->SendError("Protocol error - Introduced remote server from unknown server "+prefix);
 788                 return false;
 789         }
 790         if (!Utils->IsSID(sid))
 791         {
 792                 this->SendError("Invalid format server ID: "+sid+"!");
 793                 return false;
 794         }
 795         TreeServer* CheckDupe = Utils->FindServer(servername);
 796         if (CheckDupe)
 797         {
 798                 this->SendError("Server "+servername+" already exists!");
 799                 this->Instance->SNO->WriteToSnoMask('l',"Server \2"+servername+"\2 being introduced from \2" + prefix + "\2 denied, already exists. Closing link with " + prefix);
 800                 return false;
 801         }
 802
 803         Link* lnk = Utils->FindLink(servername);
 804
 805         TreeServer *Node = new TreeServer(this->Utils, this->Instance, servername, description, sid, ParentOfThis,NULL, lnk ? lnk->Hidden : false);
 806
 807         if (Node->DuplicateID())
 808         {
 809                 this->SendError("Server ID "+sid+" already exists on the network!");
 810                 this->Instance->SNO->WriteToSnoMask('l',"Server \2"+servername+"\2 being introduced from \2" + prefix + "\2 denied, server ID already exists on the network. Closing link with " + prefix);
 811                 return false;
 812         }
 813
 814         ParentOfThis->AddChild(Node);
 815         params[4] = ":" + params[4];
 816         Utils->SetRemoteBursting(Node, true);
 817         Utils->DoOneToAllButSender(prefix,"SERVER",params,prefix);
 818         this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
 819         return true;
 820 }
 821
 822 bool TreeSocket::ComparePass(const std::string &ours, const std::string &theirs)
 823 {
 824         if ((!strncmp(ours.c_str(), "HMAC-SHA256:", 12)) || (!strncmp(theirs.c_str(), "HMAC-SHA256:", 12)))
 825         {
 826                 /* One or both of us specified hmac sha256, but we don't have sha256 module loaded!
 827                  * We can't allow this password as valid.
 828                  */
 829                 if (!Instance->Modules->Find("m_sha256.so") || !Utils->ChallengeResponse)
 830                                 return false;
 831                 else
 832                         /* Straight string compare of hashes */
 833                         return ours == theirs;
 834         }
 835         else
 836                 /* Straight string compare of plaintext */
 837                 return ours == theirs;
 838 }
 839
 840 bool TreeSocket::Outbound_Reply_Server(std::deque<std::string> &params)
 841 {
 842         if (params.size() < 5)
 843         {
 844                 SendError("Protocol error - Missing SID");
 845                 return false;
 846         }
 847
 848         irc::string servername = params[0].c_str();
 849         std::string sname = params[0];
 850         std::string password = params[1];
 851         std::string sid = params[3];
 852         std::string description = params[4];
 853         int hops = atoi(params[2].c_str());
 854
 855         this->InboundServerName = sname;
 856         this->InboundDescription = description;
 857         this->InboundSID = sid;
 858
 859         if (!sentcapab)
 860                 this->SendCapabilities();
 861
 862         if (hops)
 863         {
 864                 this->SendError("Server too far away for authentication");
 865                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
 866                 return false;
 867         }
 868
 869         if (!Utils->IsSID(sid))
 870         {
 871                 this->SendError("Invalid format server ID: "+sid+"!");
 872                 return false;
 873         }
 874
 875         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 876         {
 877                 if ((x->Name == servername) && ((ComparePass(this->MakePass(x->RecvPass,this->GetOurChallenge()),password)) || (x->RecvPass == password && (this->GetTheirChallenge().empty()))))
 878                 {
 879                         TreeServer* CheckDupe = Utils->FindServer(sname);
 880                         if (CheckDupe)
 881                         {
 882                                 this->SendError("Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
 883                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
 884                                 return false;
 885                         }
 886                         // Begin the sync here. this kickstarts the
 887                         // other side, waiting in WAIT_AUTH_2 state,
 888                         // into starting their burst, as it shows
 889                         // that we're happy.
 890                         this->LinkState = CONNECTED;
 891                         // we should add the details of this server now
 892                         // to the servers tree, as a child of the root
 893                         // node.
 894
 895                         TreeServer *Node = new TreeServer(this->Utils, this->Instance, sname, description, sid, Utils->TreeRoot, this, x->Hidden);
 896
 897                         if (Node->DuplicateID())
 898                         {
 899                                 this->SendError("Server ID "+sid+" already exists on the network!");
 900                                 this->Instance->SNO->WriteToSnoMask('l',"Server \2"+assign(servername)+"\2 being introduced denied, server ID already exists on the network. Closing link.");
 901                                 return false;
 902                         }
 903
 904                         Utils->TreeRoot->AddChild(Node);
 905                         params[4] = ":" + params[4];
 906                         Utils->DoOneToAllButSender(Instance->Config->GetSID(),"SERVER",params,sname);
 907                         this->bursting = true;
 908                         this->DoBurst(Node);
 909                         return true;
 910                 }
 911         }
 912         this->SendError("Invalid credentials");
 913         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
 914         return false;
 915 }
 916
 917 bool TreeSocket::Inbound_Server(std::deque<std::string> &params)
 918 {
 919         if (params.size() < 5)
 920         {
 921                 SendError("Protocol error - Missing SID");
 922                 return false;
 923         }
 924
 925         irc::string servername = params[0].c_str();
 926         std::string sname = params[0];
 927         std::string password = params[1];
 928         std::string sid = params[3];
 929         std::string description = params[4];
 930         int hops = atoi(params[2].c_str());
 931
 932         this->InboundServerName = sname;
 933         this->InboundDescription = description;
 934         this->InboundSID = sid;
 935
 936         if (!sentcapab)
 937                 this->SendCapabilities();
 938
 939         if (hops)
 940         {
 941                 this->SendError("Server too far away for authentication");
 942                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
 943                 return false;
 944         }
 945
 946         if (!Utils->IsSID(sid))
 947         {
 948                 this->SendError("Invalid format server ID: "+sid+"!");
 949                 return false;
 950         }
 951
 952         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 953         {
 954                 if ((x->Name == servername) && ((ComparePass(this->MakePass(x->RecvPass,this->GetOurChallenge()),password) || x->RecvPass == password && (this->GetTheirChallenge().empty()))))
 955                 {
 956                         /* First check for instances of the server that are waiting between the inbound and outbound SERVER command */
 957                         TreeSocket* CheckDupeSocket = Utils->FindBurstingServer(sname);
 958                         if (CheckDupeSocket)
 959                         {
 960                                 /* If we find one, we abort the link to prevent a race condition */
 961                                 this->SendError("Negotiation collision");
 962                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists in a negotiating state.");
 963                                 CheckDupeSocket->SendError("Negotiation collision");
 964                                 Instance->SE->DelFd(CheckDupeSocket);
 965                                 CheckDupeSocket->Close();
 966                                 return false;
 967                         }
 968                         /* Check for fully initialized instances of the server by id */
 969                         Instance->Log(DEBUG,"Looking for dupe SID %s", sid.c_str());
 970                         TreeServer* CheckDupeSID = Utils->FindServerID(sid);
 971                         if (CheckDupeSID)
 972                         {
 973                                 this->SendError("Server ID "+CheckDupeSID->GetID()+" already exists on server "+CheckDupeSID->GetName()+"!");
 974                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server ID '"+CheckDupeSID->GetID()+
 975                                                 "' already exists on server "+CheckDupeSID->GetName());
 976                                 return false;
 977                         }
 978                         /* Now check for fully initialized instances of the server by name */
 979                         TreeServer* CheckDupe = Utils->FindServer(sname);
 980                         if (CheckDupe)
 981                         {
 982                                 this->SendError("Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
 983                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
 984                                 return false;
 985                         }
 986                         this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
 987                         if (this->Hook)
 988                         {
 989                                 std::string name = BufferedSocketNameRequest((Module*)Utils->Creator, this->Hook).Send();
 990                                 this->Instance->SNO->WriteToSnoMask('l',"Connection from \2"+sname+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] using transport \2"+name+"\2");
 991                         }
 992
 993                         Utils->AddBurstingServer(sname,this);
 994
 995                         // this is good. Send our details: Our server name and description and hopcount of 0,
 996                         // along with the sendpass from this block.
 997                         this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+this->MakePass(x->SendPass, this->GetTheirChallenge())+" 0 "+Instance->Config->GetSID()+" :"+this->Instance->Config->ServerDesc);
 998                         // move to the next state, we are now waiting for THEM.
 999                         this->LinkState = WAIT_AUTH_2;
1000                         return true;
1001                 }
1002         }
1003         this->SendError("Invalid credentials");
1004         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
1005         return false;
1006 }
1007
1008 void TreeSocket::Split(const std::string &line, std::deque<std::string> &n)
1009 {
1010         n.clear();
1011         irc::tokenstream tokens(line);
1012         std::string param;
1013         while (tokens.GetToken(param))
1014         {
1015                 n.push_back(param);
1016         }
1017         return;
1018 }
1019
1020 bool TreeSocket::ProcessLine(std::string &line)
1021 {
1022         std::deque<std::string> params;
1023         irc::string command;
1024         std::string prefix;
1025
1026         line = line.substr(0, line.find_first_of("\r\n"));
1027
1028         if (line.empty())
1029                 return true;
1030
1031         Instance->Log(DEBUG, "S[%d] I %s", this->GetFd(), line.c_str());
1032
1033         this->Split(line.c_str(),params);
1034
1035         if (params.empty())
1036                 return true;
1037
1038         if ((params[0][0] == ':') && (params.size() > 1))
1039         {
1040                 prefix = params[0].substr(1);
1041                 params.pop_front();
1042         }
1043         command = params[0].c_str();
1044         params.pop_front();
1045         switch (this->LinkState)
1046         {
1047                 TreeServer* Node;
1048
1049                 case WAIT_AUTH_1:
1050                         // Waiting for SERVER command from remote server. Server initiating
1051                         // the connection sends the first SERVER command, listening server
1052                         // replies with theirs if its happy, then if the initiator is happy,
1053                         // it starts to send its net sync, which starts the merge, otherwise
1054                         // it sends an ERROR.
1055                         if (command == "PASS")
1056                         {
1057                                 /* Silently ignored */
1058                         }
1059                         else if (command == "SERVER")
1060                         {
1061                                 return this->Inbound_Server(params);
1062                         }
1063                         else if (command == "ERROR")
1064                         {
1065                                 return this->Error(params);
1066                         }
1067                         else if (command == "USER")
1068                         {
1069                                 this->SendError("Client connections to this port are prohibited.");
1070                                 return false;
1071                         }
1072                         else if (command == "CAPAB")
1073                         {
1074                                 return this->Capab(params);
1075                         }
1076                         else
1077                         {
1078                                 irc::string error = "Invalid command in negotiation phase: " + command;
1079                                 this->SendError(assign(error));
1080                                 return false;
1081                         }
1082                 break;
1083                 case WAIT_AUTH_2:
1084                         // Waiting for start of other side's netmerge to say they liked our
1085                         // password.
1086                         if (command == "SERVER")
1087                         {
1088                                 // cant do this, they sent it to us in the WAIT_AUTH_1 state!
1089                                 // silently ignore.
1090                                 return true;
1091                         }
1092                         else if (command == "BURST")
1093                         {
1094                                 if (params.size() && Utils->EnableTimeSync)
1095                                 {
1096                                         bool we_have_delta = (Instance->Time(false) != Instance->Time(true));
1097                                         time_t them = atoi(params[0].c_str());
1098                                         time_t delta = them - Instance->Time(false);
1099                                         if ((delta < -600) || (delta > 600))
1100                                         {
1101                                                 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));
1102                                                 SendError("Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than five minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
1103                                                 return false;
1104                                         }
1105                                         else if ((delta < -30) || (delta > 30))
1106                                         {
1107                                                 Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds. Please consider synching your clocks.", abs(delta));
1108                                         }
1109
1110                                         if (!Utils->MasterTime && !we_have_delta)
1111                                         {
1112                                                 this->Instance->SetTimeDelta(delta);
1113                                                 // Send this new timestamp to any other servers
1114                                                 Utils->DoOneToMany(Instance->Config->GetSID(), "TIMESET", params);
1115                                         }
1116                                 }
1117                                 this->LinkState = CONNECTED;
1118                                 Link* lnk = Utils->FindLink(InboundServerName);
1119
1120                                 Node = new TreeServer(this->Utils, this->Instance, InboundServerName, InboundDescription, InboundSID, Utils->TreeRoot, this, lnk ? lnk->Hidden : false);
1121
1122                                 if (Node->DuplicateID())
1123                                 {
1124                                         this->SendError("Server ID "+InboundSID+" already exists on the network!");
1125                                         this->Instance->SNO->WriteToSnoMask('l',"Server \2"+InboundServerName+"\2 being introduced from \2" + prefix + "\2 denied, server ID already exists on the network. Closing link.");
1126                                         return false;
1127                                 }
1128                                 Utils->DelBurstingServer(this);
1129                                 Utils->TreeRoot->AddChild(Node);
1130                                 params.clear();
1131                                 params.push_back(InboundServerName);
1132                                 params.push_back("*");
1133                                 params.push_back("1");
1134                                 params.push_back(InboundSID);
1135                                 params.push_back(":"+InboundDescription);
1136                                 Utils->DoOneToAllButSender(Instance->Config->GetSID(),"SERVER",params,InboundServerName);
1137                                 this->bursting = true;
1138                                 this->DoBurst(Node);
1139                         }
1140                         else if (command == "ERROR")
1141                         {
1142                                 return this->Error(params);
1143                         }
1144                         else if (command == "CAPAB")
1145                         {
1146                                 return this->Capab(params);
1147                         }
1148
1149                 break;
1150                 case LISTENER:
1151                         this->SendError("Internal error -- listening socket accepted its own descriptor!!!");
1152                         return false;
1153                 break;
1154                 case CONNECTING:
1155                         if (command == "SERVER")
1156                         {
1157                                 // another server we connected to, which was in WAIT_AUTH_1 state,
1158                                 // has just sent us their credentials. If we get this far, theyre
1159                                 // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
1160                                 // if we're happy with this, we should send our netburst which
1161                                 // kickstarts the merge.
1162                                 return this->Outbound_Reply_Server(params);
1163                         }
1164                         else if (command == "ERROR")
1165                         {
1166                                 return this->Error(params);
1167                         }
1168                         else if (command == "CAPAB")
1169                         {
1170                                 return this->Capab(params);
1171                         }
1172                 break;
1173                 case CONNECTED:
1174                         // This is the 'authenticated' state, when all passwords
1175                         // have been exchanged and anything past this point is taken
1176                         // as gospel.
1177
1178                         if (!prefix.empty())
1179                         {
1180                                 std::string direction = prefix;
1181
1182                                 User *t = this->Instance->FindUUID(prefix);
1183                                 if (t)
1184                                 {
1185                                         direction = t->server;
1186                                 }
1187
1188                                 TreeServer* route_back_again = Utils->BestRouteTo(direction);
1189                                 if ((!route_back_again) || (route_back_again->GetSocket() != this))
1190                                 {
1191                                         if (route_back_again)
1192                                                 Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
1193                                         return true;
1194                                 }
1195                                 /* Fix by brain:
1196                                  * When there is activity on the socket, reset the ping counter so
1197                                  * that we're not wasting bandwidth pinging an active server.
1198                                  */
1199                                 route_back_again->SetNextPingTime(time(NULL) + Utils->PingFreq);
1200                                 route_back_again->SetPingFlag();
1201                         }
1202                         else
1203                         {
1204                                 TreeServer* n = Utils->FindServer(GetName());
1205                                 if (n)
1206                                         prefix = n->GetID();
1207                                 else
1208                                         prefix = GetName();
1209                         }
1210
1211                         if ((command == "MODE") && (params.size() >= 2))
1212                         {
1213                                 Channel* channel = Instance->FindChan(params[0]);
1214                                 if (channel)
1215                                 {
1216                                         User* x = Instance->FindNick(prefix);
1217                                         if (x)
1218                                         {
1219                                                 if (warned.find(x->server) == warned.end())
1220                                                 {
1221                                                         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);
1222                                                         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());
1223                                                         warned[x->server] = x->nick;
1224                                                 }
1225                                         }
1226                                 }
1227                         }
1228
1229                         if (command == "SVSMODE")
1230                         {
1231                                 /* Services expects us to implement
1232                                  * SVSMODE. In inspircd its the same as
1233                                  * MODE anyway.
1234                                  */
1235                                 command = "MODE";
1236                         }
1237                         std::string target;
1238                         /* Yes, know, this is a mess. Its reasonably fast though as we're
1239                          * working with std::string here.
1240                          */
1241                         if (command == "UID")
1242                         {
1243                                 return this->ParseUID(prefix, params);
1244                         }
1245                         else if (command == "FJOIN")
1246                         {
1247                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1248                                 if (ServerSource)
1249                                         Utils->SetRemoteBursting(ServerSource, false);
1250                                 return this->ForceJoin(prefix,params);
1251                         }
1252                         else if (command == "STATS")
1253                         {
1254                                 return this->Stats(prefix, params);
1255                         }
1256                         else if (command == "MOTD")
1257                         {
1258                                 return this->Motd(prefix, params);
1259                         }
1260                         else if (command == "KILL" && Utils->IsServer(prefix))
1261                         {
1262                                 return this->RemoteKill(prefix,params);
1263                         }
1264                         else if (command == "MODULES")
1265                         {
1266                                 return this->Modules(prefix, params);
1267                         }
1268                         else if (command == "ADMIN")
1269                         {
1270                                 return this->Admin(prefix, params);
1271                         }
1272                         else if (command == "SERVER")
1273                         {
1274                                 return this->RemoteServer(prefix,params);
1275                         }
1276                         else if (command == "ERROR")
1277                         {
1278                                 return this->Error(params);
1279                         }
1280                         else if (command == "OPERTYPE")
1281                         {
1282                                 return this->OperType(prefix,params);
1283                         }
1284                         else if (command == "FMODE")
1285                         {
1286                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1287                                 if (ServerSource)
1288                                         Utils->SetRemoteBursting(ServerSource, false);
1289                                 return this->ForceMode(prefix,params);
1290                         }
1291                         else if (command == "FTOPIC")
1292                         {
1293                                 return this->ForceTopic(prefix,params);
1294                         }
1295                         else if (command == "REHASH")
1296                         {
1297                                 return this->RemoteRehash(prefix,params);
1298                         }
1299                         else if (command == "METADATA")
1300                         {
1301                                 return this->MetaData(prefix,params);
1302                         }
1303                         else if (command == "REMSTATUS")
1304                         {
1305                                 return this->RemoveStatus(prefix,params);
1306                         }
1307                         else if (command == "PING")
1308                         {
1309                                 /*
1310                                  * We just got a ping from a server that's bursting.
1311                                  * This can't be right, so set them to not bursting, and
1312                                  * apply their lines.
1313                                  */
1314                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1315                                 if (ServerSource)
1316                                         Utils->SetRemoteBursting(ServerSource, false);
1317
1318                                 if (this->bursting)
1319                                 {
1320                                         this->bursting = false;
1321                                         Instance->XLines->ApplyLines();
1322                                 }
1323
1324                                 return this->LocalPing(prefix,params);
1325                         }
1326                         else if (command == "PONG")
1327                         {
1328                                 /*
1329                                  * We just got a pong from a server that's bursting.
1330                                  * This can't be right, so set them to not bursting, and
1331                                  * apply their lines.
1332                                  */
1333                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1334                                 if (ServerSource)
1335                                         Utils->SetRemoteBursting(ServerSource, false);
1336
1337                                 if (this->bursting)
1338                                 {
1339                                         this->bursting = false;
1340                                         Instance->XLines->ApplyLines();
1341                                 }
1342
1343                                 return this->LocalPong(prefix,params);
1344                         }
1345                         else if (command == "VERSION")
1346                         {
1347                                 return this->ServerVersion(prefix,params);
1348                         }
1349                         else if (command == "FHOST")
1350                         {
1351                                 return this->ChangeHost(prefix,params);
1352                         }
1353                         else if (command == "FNAME")
1354                         {
1355                                 return this->ChangeName(prefix,params);
1356                         }
1357                         else if (command == "ADDLINE")
1358                         {
1359                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1360                                 if (ServerSource)
1361                                         Utils->SetRemoteBursting(ServerSource, false);
1362                                 return this->AddLine(prefix,params);
1363                         }
1364                         else if (command == "SVSNICK")
1365                         {
1366                                 return this->ForceNick(prefix,params);
1367                         }
1368                         else if (command == "OPERQUIT")
1369                         {
1370                                 return this->OperQuit(prefix,params);
1371                         }
1372                         else if (command == "IDLE")
1373                         {
1374                                 return this->Whois(prefix,params);
1375                         }
1376                         else if (command == "PUSH")
1377                         {
1378                                 return this->Push(prefix,params);
1379                         }
1380                         else if (command == "TIMESET")
1381                         {
1382                                 return this->HandleSetTime(prefix, params);
1383                         }
1384                         else if (command == "TIME")
1385                         {
1386                                 return this->Time(prefix,params);
1387                         }
1388                         else if ((command == "KICK") && (Utils->IsServer(prefix)))
1389                         {
1390                                 std::string sourceserv = this->myhost;
1391                                 if (params.size() == 3)
1392                                 {
1393                                         User* user = this->Instance->FindNick(params[1]);
1394                                         Channel* chan = this->Instance->FindChan(params[0]);
1395                                         if (user && chan)
1396                                         {
1397                                                 if (!chan->ServerKickUser(user, params[2].c_str(), false))
1398                                                         /* Yikes, the channels gone! */
1399                                                         delete chan;
1400                                         }
1401                                 }
1402                                 if (!this->InboundServerName.empty())
1403                                 {
1404                                         sourceserv = this->InboundServerName;
1405                                 }
1406                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1407                         }
1408                         else if (command == "SVSJOIN")
1409                         {
1410                                 return this->ServiceJoin(prefix,params);
1411                         }
1412                         else if (command == "SVSPART")
1413                         {
1414                                 return this->ServicePart(prefix,params);
1415                         }
1416                         else if (command == "SQUIT")
1417                         {
1418                                 if (params.size() == 2)
1419                                 {
1420                                         this->Squit(Utils->FindServer(params[0]),params[1]);
1421                                 }
1422                                 return true;
1423                         }
1424                         else if (command == "OPERNOTICE")
1425                         {
1426                                 std::string sourceserv = this->myhost;
1427                                 if (!this->InboundServerName.empty())
1428                                         sourceserv = this->InboundServerName;
1429                                 if (params.size() >= 1)
1430                                         Instance->WriteOpers("*** From " + prefix + ": " + params[0]);
1431                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1432                         }
1433                         else if (command == "MODENOTICE")
1434                         {
1435                                 std::string sourceserv = this->myhost;
1436                                 if (!this->InboundServerName.empty())
1437                                         sourceserv = this->InboundServerName;
1438                                 if (params.size() >= 2)
1439                                 {
1440                                         Instance->WriteMode(params[0].c_str(), WM_AND, "*** From %s: %s", prefix.c_str(), params[1].c_str());
1441                                 }
1442                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1443                         }
1444                         else if (command == "SNONOTICE")
1445                         {
1446                                 std::string sourceserv = this->myhost;
1447                                 if (!this->InboundServerName.empty())
1448                                         sourceserv = this->InboundServerName;
1449                                 if (params.size() >= 2)
1450                                 {
1451                                         Instance->SNO->WriteToSnoMask(*(params[0].c_str()), "From " + prefix + ": "+ params[1]);
1452                                 }
1453                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1454                         }
1455                         else if (command == "ENDBURST")
1456                         {
1457                                 this->bursting = false;
1458                                 Instance->XLines->ApplyLines();
1459                                 std::string sourceserv = this->myhost;
1460                                 if (!this->InboundServerName.empty())
1461                                         sourceserv = this->InboundServerName;
1462                                 this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
1463
1464                                 Event rmode((char*)sourceserv.c_str(), (Module*)Utils->Creator, "new_server");
1465                                 rmode.Send(Instance);
1466
1467                                 return true;
1468                         }
1469                         else
1470                         {
1471                                 /*
1472                                  * Not a special s2s command. Emulate the user doing it.
1473                                  * This saves us having a huge ugly command parser again.
1474                                  */
1475                                 User *who = this->Instance->FindUUID(prefix);
1476
1477                                 std::string sourceserv = this->myhost;
1478                                 if (!this->InboundServerName.empty())
1479                                 {
1480                                         sourceserv = this->InboundServerName;
1481                                 }
1482                                 if ((!who) && (command == "MODE"))
1483                                 {
1484                                         if (Utils->IsServer(prefix))
1485                                         {
1486                                                 const char* modelist[MAXPARAMETERS];
1487                                                 for (size_t i = 0; i < params.size(); i++)
1488                                                         modelist[i] = params[i].c_str();
1489                                                 this->Instance->SendMode(modelist, params.size(), this->Instance->FakeClient);
1490                                                 /* Hot potato! pass it on! */
1491                                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1492                                         }
1493                                 }
1494                                 if (who)
1495                                 {
1496                                         if (command == "NICK")
1497                                         {
1498                                                 if (params.size() != 2)
1499                                                 {
1500                                                         SendError("Protocol violation: NICK message without TS - :"+std::string(who->uuid)+" NICK "+params[0]);
1501                                                         return false;
1502                                                 }
1503                                                 /* Update timestamp on user when they change nicks */
1504                                                 who->age = atoi(params[1].c_str());
1505
1506                                                 /* On nick messages, check that the nick doesnt
1507                                                  * already exist here. If it does, kill their copy,
1508                                                  * and our copy.
1509                                                  */
1510                                                 User* x = this->Instance->FindNickOnly(params[0]);
1511                                                 if ((x) && (x != who))
1512                                                 {
1513                                                         int collideret = 0;
1514                                                         /* x is local, who is remote */
1515                                                         collideret = this->DoCollision(x, who->age, who->ident, who->GetIPString(), who->uuid);
1516                                                         if (collideret != 1)
1517                                                         {
1518                                                                 /*
1519                                                                  * Remote client lost, or both lost,
1520                                                                  * parsing this nickchange would be
1521                                                                  * pointless, as the incoming client's
1522                                                                  * server will soon recieve SVSNICK to
1523                                                                  * change its nick to its UID. :)
1524                                                                  *   -- w00t
1525                                                                  */
1526                                                                 return true;
1527                                                         }
1528 /*
1529 Old nickname collision logic..
1530                                                         std::deque<std::string> p;
1531                                                         p.push_back(params[0]);
1532                                                         p.push_back(":Nickname collision ("+prefix+" -> "+params[0]+")");
1533                                                         Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
1534                                                         p.clear();
1535                                                         p.push_back(prefix);
1536                                                         p.push_back(":Nickname collision");
1537                                                         Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
1538                                                         User::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
1539                                                         User* y = this->Instance->FindNick(prefix);
1540                                                         if (y)
1541                                                         {
1542                                                                 User::QuitUser(this->Instance,y,"Nickname collision");
1543                                                         }
1544                                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1545 */
1546                                                 }
1547                                         }
1548                                         // its a user
1549                                         target = who->server;
1550                                         const char* strparams[127];
1551                                         for (unsigned int q = 0; q < params.size(); q++)
1552                                         {
1553                                                 strparams[q] = params[q].c_str();
1554                                         }
1555                                         switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
1556                                         {
1557                                                 case CMD_INVALID:
1558                                                         this->SendError("Unrecognised or malformed command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
1559                                                         return false;
1560                                                 break;
1561                                                 case CMD_FAILURE:
1562                                                         return true;
1563                                                 break;
1564                                                 default:
1565                                                         /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
1566                                                 break;
1567                                         }
1568                                 }
1569                                 else
1570                                 {
1571                                         // its not a user. Its either a server, or somethings screwed up.
1572                                         if (Utils->IsServer(prefix))
1573                                                 target = this->Instance->Config->GetSID();
1574                                         else
1575                                                 return true;
1576                                 }
1577                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1578
1579                         }
1580                         return true;
1581                 break;
1582         }
1583         return true;
1584 }
1585
1586 std::string TreeSocket::GetName()
1587 {
1588         std::string sourceserv = this->myhost;
1589         if (!this->InboundServerName.empty())
1590         {
1591                 sourceserv = this->InboundServerName;
1592         }
1593         return sourceserv;
1594 }
1595
1596 void TreeSocket::OnTimeout()
1597 {
1598         if (this->LinkState == CONNECTING)
1599         {
1600                 Utils->Creator->RemoteMessage(NULL, "CONNECT: Connection to \002%s\002 timed out.", myhost.c_str());
1601                 Link* MyLink = Utils->FindLink(myhost);
1602                 if (MyLink)
1603                         Utils->DoFailOver(MyLink);
1604         }
1605 }
1606
1607 void TreeSocket::OnClose()
1608 {
1609         if (this->LinkState == LISTENER)
1610                 return;
1611
1612         // Connection closed.
1613         // If the connection is fully up (state CONNECTED)
1614         // then propogate a netsplit to all peers.
1615         std::string quitserver = this->myhost;
1616         if (!this->InboundServerName.empty())
1617         {
1618                 quitserver = this->InboundServerName;
1619         }
1620         TreeServer* s = Utils->FindServer(quitserver);
1621         if (s)
1622         {
1623                 Squit(s,"Remote host closed the connection");
1624         }
1625
1626         if (!quitserver.empty())
1627         {
1628                 Utils->Creator->RemoteMessage(NULL,"Connection to '\2%s\2' failed.",quitserver.c_str());
1629                 time_t server_uptime = Instance->Time() - this->age;
1630                 if (server_uptime)
1631                         Utils->Creator->RemoteMessage(NULL,"Connection to '\2%s\2' was established for %s", quitserver.c_str(), Utils->Creator->TimeToStr(server_uptime).c_str());
1632         }
1633 }
1634
1635 int TreeSocket::OnIncomingConnection(int newsock, char* ip)
1636 {
1637         /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
1638          * or discovering if this port is the server port, we don't allow connections from any
1639          * IPs for which we don't have a link block.
1640          */
1641         bool found = false;
1642
1643         found = (std::find(Utils->ValidIPs.begin(), Utils->ValidIPs.end(), ip) != Utils->ValidIPs.end());
1644         if (!found)
1645         {
1646                 for (vector<std::string>::iterator i = Utils->ValidIPs.begin(); i != Utils->ValidIPs.end(); i++)
1647                         if (irc::sockets::MatchCIDR(ip, (*i).c_str()))
1648                                 found = true;
1649
1650                 if (!found)
1651                 {
1652                         Utils->Creator->RemoteMessage(NULL,"Server connection from %s denied (no link blocks with that IP address)", ip);
1653                         Instance->SE->Close(newsock);
1654                         return false;
1655                 }
1656         }
1657
1658         TreeSocket* s = new TreeSocket(this->Utils, this->Instance, newsock, ip, this->Hook);
1659         s = s; /* Whinge whinge whinge, thats all GCC ever does. */
1660         return true;
1661 }