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                 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()));
 249         }
 250         return true;
 251 }
 252
 253 /** Because Andy insists that services-compatible servers must
 254  * implement SVSNICK and SVSJOIN, that's exactly what we do :p
 255  */
 256 bool TreeSocket::ForceNick(const std::string &prefix, std::deque<std::string> &params)
 257 {
 258         if (params.size() < 3)
 259                 return true;
 260
 261         userrec* u = this->Instance->FindNick(params[0]);
 262
 263         if (u)
 264         {
 265                 Utils->DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
 266                 if (IS_LOCAL(u))
 267                 {
 268                         std::deque<std::string> par;
 269                         par.push_back(params[1]);
 270                         if (!u->ForceNickChange(params[1].c_str()))
 271                         {
 272                                 userrec::QuitUser(this->Instance, u, "Nickname collision");
 273                                 return true;
 274                         }
 275                         u->age = atoi(params[2].c_str());
 276                 }
 277         }
 278         return true;
 279 }
 280
 281 bool TreeSocket::OperQuit(const std::string &prefix, std::deque<std::string> &params)
 282 {
 283         if (params.size() < 1)
 284                 return true;
 285
 286         userrec* u = this->Instance->FindNick(prefix);
 287
 288         if (u)
 289         {
 290                 u->SetOperQuit(params[0]);
 291                 params[0] = ":" + params[0];
 292                 Utils->DoOneToAllButSender(prefix,"OPERQUIT",params,prefix);
 293         }
 294         return true;
 295 }
 296
 297 bool TreeSocket::ServiceJoin(const std::string &prefix, std::deque<std::string> &params)
 298 {
 299         if (params.size() < 2)
 300                 return true;
 301
 302         userrec* u = this->Instance->FindNick(params[0]);
 303
 304         if (u)
 305         {
 306                 /* only join if it's local, otherwise just pass it on! */
 307                 if (IS_LOCAL(u))
 308                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false, "", Instance->Time());
 309                 Utils->DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
 310         }
 311         return true;
 312 }
 313
 314 bool TreeSocket::RemoteRehash(const std::string &prefix, std::deque<std::string> &params)
 315 {
 316         if (params.size() < 1)
 317                 return false;
 318
 319         std::string servermask = params[0];
 320
 321         if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
 322         {
 323                 this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated by \002"+prefix+"\002.");
 324                 this->Instance->RehashServer();
 325                 Utils->ReadConfiguration(false);
 326                 InitializeDisabledCommands(Instance->Config->DisabledCommands, Instance);
 327         }
 328         Utils->DoOneToAllButSender(prefix,"REHASH",params,prefix);
 329         return true;
 330 }
 331
 332 bool TreeSocket::RemoteKill(const std::string &prefix, std::deque<std::string> &params)
 333 {
 334         if (params.size() != 2)
 335                 return true;
 336
 337         userrec* who = this->Instance->FindNick(params[0]);
 338
 339         if (who)
 340         {
 341                 /* Prepend kill source, if we don't have one */
 342                 if (*(params[1].c_str()) != '[')
 343                 {
 344                         params[1] = "[" + prefix + "] Killed (" + params[1] +")";
 345                 }
 346                 std::string reason = params[1];
 347                 params[1] = ":" + params[1];
 348                 Utils->DoOneToAllButSender(prefix,"KILL",params,prefix);
 349                 who->Write(":%s KILL %s :%s (%s)", prefix.c_str(), who->nick, prefix.c_str(), reason.c_str());
 350                 userrec::QuitUser(this->Instance,who,reason);
 351         }
 352         return true;
 353 }
 354
 355 bool TreeSocket::LocalPong(const std::string &prefix, std::deque<std::string> &params)
 356 {
 357         if (params.size() < 1)
 358                 return true;
 359
 360         if (params.size() == 1)
 361         {
 362                 TreeServer* ServerSource = Utils->FindServer(prefix);
 363                 if (ServerSource)
 364                 {
 365                         ServerSource->SetPingFlag();
 366                         ServerSource->rtt = Instance->Time() - ServerSource->LastPing;
 367                 }
 368         }
 369         else
 370         {
 371                 std::string forwardto = params[1];
 372                 if (forwardto == this->Instance->Config->ServerName)
 373                 {
 374                         /*
 375                          * this is a PONG for us
 376                          * if the prefix is a user, check theyre local, and if they are,
 377                          * dump the PONG reply back to their fd. If its a server, do nowt.
 378                          * Services might want to send these s->s, but we dont need to yet.
 379                          */
 380                         userrec* u = this->Instance->FindNick(prefix);
 381                         if (u)
 382                         {
 383                                 u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
 384                         }
 385                 }
 386                 else
 387                 {
 388                         // not for us, pass it on :)
 389                         Utils->DoOneToOne(prefix,"PONG",params,forwardto);
 390                 }
 391         }
 392
 393         return true;
 394 }
 395
 396 bool TreeSocket::MetaData(const std::string &prefix, std::deque<std::string> &params)
 397 {
 398         if (params.size() < 2)
 399                 return true;
 400         else if (params.size() < 3)
 401                 params.push_back("");
 402         TreeServer* ServerSource = Utils->FindServer(prefix);
 403         if (ServerSource)
 404         {
 405                 Utils->SetRemoteBursting(ServerSource, false);
 406
 407                 if (params[0] == "*")
 408                 {
 409                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
 410                 }
 411                 else if (*(params[0].c_str()) == '#')
 412                 {
 413                         chanrec* c = this->Instance->FindChan(params[0]);
 414                         if (c)
 415                         {
 416                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
 417                         }
 418                 }
 419                 else if (*(params[0].c_str()) != '#')
 420                 {
 421                         userrec* u = this->Instance->FindNick(params[0]);
 422                         if (u)
 423                         {
 424                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
 425                         }
 426                 }
 427         }
 428
 429         params[2] = ":" + params[2];
 430         Utils->DoOneToAllButSender(prefix,"METADATA",params,prefix);
 431         return true;
 432 }
 433
 434 bool TreeSocket::ServerVersion(const std::string &prefix, std::deque<std::string> &params)
 435 {
 436         if (params.size() < 1)
 437                 return true;
 438
 439         TreeServer* ServerSource = Utils->FindServer(prefix);
 440
 441         if (ServerSource)
 442         {
 443                 ServerSource->SetVersion(params[0]);
 444         }
 445         params[0] = ":" + params[0];
 446         Utils->DoOneToAllButSender(prefix,"VERSION",params,prefix);
 447         return true;
 448 }
 449
 450 bool TreeSocket::ChangeHost(const std::string &prefix, std::deque<std::string> &params)
 451 {
 452         if (params.size() < 1)
 453                 return true;
 454         userrec* u = this->Instance->FindNick(prefix);
 455
 456         if (u)
 457         {
 458                 u->ChangeDisplayedHost(params[0].c_str());
 459                 Utils->DoOneToAllButSender(prefix,"FHOST",params,u->server);
 460         }
 461         return true;
 462 }
 463
 464 bool TreeSocket::AddLine(const std::string &prefix, std::deque<std::string> &params)
 465 {
 466         if (params.size() < 6)
 467                 return true;
 468         bool propogate = false;
 469         if (!this->bursting)
 470                 Utils->lines_to_apply = 0;
 471         switch (*(params[0].c_str()))
 472         {
 473                 case 'Z':
 474                         propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 475                         Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 476                         if (propogate)
 477                                 Utils->lines_to_apply |= APPLY_ZLINES;
 478                 break;
 479                 case 'Q':
 480                         propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 481                         Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 482                         if (propogate)
 483                                 Utils->lines_to_apply |= APPLY_QLINES;
 484                 break;
 485                 case 'E':
 486                         propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 487                         Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 488                 break;
 489                 case 'G':
 490                         propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 491                         Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 492                         if (propogate)
 493                                 Utils->lines_to_apply |= APPLY_GLINES;
 494                 break;
 495                 case 'K':
 496                         propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 497                         if (propogate)
 498                                 Utils->lines_to_apply |= APPLY_KLINES;
 499                 break;
 500                 default:
 501                         /* Just in case... */
 502                         this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
 503                         propogate = false;
 504                 break;
 505         }
 506         /* Send it on its way */
 507         if (propogate)
 508         {
 509                 if (atoi(params[4].c_str()))
 510                 {
 511                         time_t c_requires_crap = ConvToInt(params[4]) + Instance->Time();
 512                         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());
 513                 }
 514                 else
 515                 {
 516                         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());
 517                 }
 518                 params[5] = ":" + params[5];
 519                 Utils->DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
 520         }
 521         if (!this->bursting)
 522         {
 523                 Instance->XLines->apply_lines(Utils->lines_to_apply);
 524                 Utils->lines_to_apply = 0;
 525         }
 526         return true;
 527 }
 528
 529 bool TreeSocket::ChangeName(const std::string &prefix, std::deque<std::string> &params)
 530 {
 531         if (params.size() < 1)
 532                 return true;
 533         userrec* u = this->Instance->FindNick(prefix);
 534         if (u)
 535         {
 536                 u->ChangeName(params[0].c_str());
 537                 params[0] = ":" + params[0];
 538                 Utils->DoOneToAllButSender(prefix,"FNAME",params,u->server);
 539         }
 540         return true;
 541 }
 542
 543 bool TreeSocket::Whois(const std::string &prefix, std::deque<std::string> &params)
 544 {
 545         if (params.size() < 1)
 546                 return true;
 547         userrec* u = this->Instance->FindNick(prefix);
 548         if (u)
 549         {
 550                 // an incoming request
 551                 if (params.size() == 1)
 552                 {
 553                         userrec* x = this->Instance->FindNick(params[0]);
 554                         if ((x) && (IS_LOCAL(x)))
 555                         {
 556                                 userrec* x = this->Instance->FindNick(params[0]);
 557                                 char signon[MAXBUF];
 558                                 char idle[MAXBUF];
 559                                 snprintf(signon, MAXBUF, "%lu", (unsigned long)x->signon);
 560                                 snprintf(idle, MAXBUF, "%lu", (unsigned long)abs((x->idle_lastmsg) - Instance->Time(true)));
 561                                 std::deque<std::string> par;
 562                                 par.push_back(prefix);
 563                                 par.push_back(signon);
 564                                 par.push_back(idle);
 565                                 // ours, we're done, pass it BACK
 566                                 Utils->DoOneToOne(params[0], "IDLE", par, u->server);
 567                         }
 568                         else
 569                         {
 570                                 // not ours pass it on
 571                                 if (x)
 572                                         Utils->DoOneToOne(prefix, "IDLE", params, x->server);
 573                         }
 574                 }
 575                 else if (params.size() == 3)
 576                 {
 577                         std::string who_did_the_whois = params[0];
 578                         userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
 579                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
 580                         {
 581                                 // an incoming reply to a whois we sent out
 582                                 std::string nick_whoised = prefix;
 583                                 unsigned long signon = atoi(params[1].c_str());
 584                                 unsigned long idle = atoi(params[2].c_str());
 585                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
 586                                 {
 587                                         do_whois(this->Instance, who_to_send_to, u, signon, idle, nick_whoised.c_str());
 588                                 }
 589                         }
 590                         else
 591                         {
 592                                 // not ours, pass it on
 593                                 if (who_to_send_to)
 594                                         Utils->DoOneToOne(prefix, "IDLE", params, who_to_send_to->server);
 595                         }
 596                 }
 597         }
 598         return true;
 599 }
 600
 601 bool TreeSocket::Push(const std::string &prefix, std::deque<std::string> &params)
 602 {
 603         if (params.size() < 2)
 604                 return true;
 605         userrec* u = this->Instance->FindNick(params[0]);
 606         if (!u)
 607                 return true;
 608         if (IS_LOCAL(u))
 609         {
 610                 u->Write(params[1]);
 611         }
 612         else
 613         {
 614                 // continue the raw onwards
 615                 params[1] = ":" + params[1];
 616                 Utils->DoOneToOne(prefix,"PUSH",params,u->server);
 617         }
 618         return true;
 619 }
 620
 621 bool TreeSocket::HandleSetTime(const std::string &prefix, std::deque<std::string> &params)
 622 {
 623         if (!params.size() || !Utils->EnableTimeSync)
 624                 return true;
 625
 626         bool force = false;
 627
 628         if ((params.size() == 2) && (params[1] == "FORCE"))
 629                 force = true;
 630
 631         time_t them = atoi(params[0].c_str());
 632         time_t us = Instance->Time(false);
 633
 634         time_t diff = them - us;
 635
 636         Utils->DoOneToAllButSender(prefix, "TIMESET", params, prefix);
 637
 638         if (force || (them != us))
 639         {
 640                 time_t old = Instance->SetTimeDelta(diff);
 641                 Instance->Log(DEBUG, "TS (diff %d) from %s applied (old delta was %d)", diff, prefix.c_str(), old);
 642         }
 643
 644         return true;
 645 }
 646
 647 bool TreeSocket::Time(const std::string &prefix, std::deque<std::string> &params)
 648 {
 649         // :source.server TIME remote.server sendernick
 650         // :remote.server TIME source.server sendernick TS
 651         if (params.size() == 2)
 652         {
 653                 // someone querying our time?
 654                 if (this->Instance->Config->ServerName == params[0])
 655                 {
 656                         userrec* u = this->Instance->FindNick(params[1]);
 657                         if (u)
 658                         {
 659                                 params.push_back(ConvToStr(Instance->Time(false)));
 660                                 params[0] = prefix;
 661                                 Utils->DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
 662                         }
 663                 }
 664                 else
 665                 {
 666                         // not us, pass it on
 667                         userrec* u = this->Instance->FindNick(params[1]);
 668                         if (u)
 669                                 Utils->DoOneToOne(prefix,"TIME",params,params[0]);
 670                 }
 671         }
 672         else if (params.size() == 3)
 673         {
 674                 // a response to a previous TIME
 675                 userrec* u = this->Instance->FindNick(params[1]);
 676                 if ((u) && (IS_LOCAL(u)))
 677                 {
 678                         time_t rawtime = atol(params[2].c_str());
 679                         struct tm * timeinfo;
 680                         timeinfo = localtime(&rawtime);
 681                         char tms[26];
 682                         snprintf(tms,26,"%s",asctime(timeinfo));
 683                         tms[24] = 0;
 684                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
 685                 }
 686                 else
 687                 {
 688                         if (u)
 689                                 Utils->DoOneToOne(prefix,"TIME",params,u->server);
 690                 }
 691         }
 692         return true;
 693 }
 694
 695 bool TreeSocket::LocalPing(const std::string &prefix, std::deque<std::string> &params)
 696 {
 697         if (params.size() < 1)
 698                 return true;
 699         if (params.size() == 1)
 700         {
 701                 std::string stufftobounce = params[0];
 702                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
 703                 return true;
 704         }
 705         else
 706         {
 707                 std::string forwardto = params[1];
 708                 if (forwardto == this->Instance->Config->ServerName)
 709                 {
 710                         // this is a ping for us, send back PONG to the requesting server
 711                         params[1] = params[0];
 712                         params[0] = forwardto;
 713                         Utils->DoOneToOne(forwardto,"PONG",params,params[1]);
 714                 }
 715                 else
 716                 {
 717                         // not for us, pass it on :)
 718                         Utils->DoOneToOne(prefix,"PING",params,forwardto);
 719                 }
 720                 return true;
 721         }
 722 }
 723
 724 /** TODO: This creates a total mess of output and needs to really use irc::modestacker.
 725  */
 726 bool TreeSocket::RemoveStatus(const std::string &prefix, std::deque<std::string> &params)
 727 {
 728         if (params.size() < 1)
 729                 return true;
 730         chanrec* c = Instance->FindChan(params[0]);
 731         if (c)
 732         {
 733                 for (char modeletter = 'A'; modeletter <= 'z'; modeletter++)
 734                 {
 735                         ModeHandler* mh = Instance->Modes->FindMode(modeletter, MODETYPE_CHANNEL);
 736                         if (mh)
 737                                 mh->RemoveMode(c);
 738                 }
 739         }
 740         return true;
 741 }
 742
 743 bool TreeSocket::RemoteServer(const std::string &prefix, std::deque<std::string> &params)
 744 {
 745         if (params.size() < 4)
 746                 return false;
 747         std::string servername = params[0];
 748         std::string password = params[1];
 749         // hopcount is not used for a remote server, we calculate this ourselves
 750         std::string description = params[3];
 751         TreeServer* ParentOfThis = Utils->FindServer(prefix);
 752         if (!ParentOfThis)
 753         {
 754                 this->SendError("Protocol error - Introduced remote server from unknown server "+prefix);
 755                 return false;
 756         }
 757         TreeServer* CheckDupe = Utils->FindServer(servername);
 758         if (CheckDupe)
 759         {
 760                 this->SendError("Server "+servername+" already exists!");
 761                 this->Instance->SNO->WriteToSnoMask('l',"Server \2"+servername+"\2 being introduced from \2" + prefix + "\2 denied, already exists. Closing link with " + prefix);
 762                 return false;
 763         }
 764         Link* lnk = Utils->FindLink(servername);
 765         TreeServer* Node = new TreeServer(this->Utils,this->Instance,servername,description,ParentOfThis,NULL, lnk ? lnk->Hidden : false);
 766         ParentOfThis->AddChild(Node);
 767         params[3] = ":" + params[3];
 768         Utils->SetRemoteBursting(Node, true);
 769         Utils->DoOneToAllButSender(prefix,"SERVER",params,prefix);
 770         this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
 771         return true;
 772 }
 773
 774 bool TreeSocket::ComparePass(const std::string &ours, const std::string &theirs)
 775 {
 776         if ((!strncmp(ours.c_str(), "HMAC-SHA256:", 12)) || (!strncmp(theirs.c_str(), "HMAC-SHA256:", 12)))
 777         {
 778                 /* One or both of us specified hmac sha256, but we don't have sha256 module loaded!
 779                  * We can't allow this password as valid.
 780                  */
 781                 if (!Instance->FindModule("m_sha256.so") || !Utils->ChallengeResponse)
 782                                 return false;
 783                 else
 784                         /* Straight string compare of hashes */
 785                         return ours == theirs;
 786         }
 787         else
 788                 /* Straight string compare of plaintext */
 789                 return ours == theirs;
 790 }
 791
 792 bool TreeSocket::Outbound_Reply_Server(std::deque<std::string> &params)
 793 {
 794         if (params.size() < 4)
 795                 return false;
 796
 797         irc::string servername = params[0].c_str();
 798         std::string sname = params[0];
 799         std::string password = params[1];
 800         std::string description = params[3];
 801         int hops = atoi(params[2].c_str());
 802
 803         this->InboundServerName = sname;
 804         this->InboundDescription = description;
 805
 806         if (hops)
 807         {
 808                 this->SendError("Server too far away for authentication");
 809                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
 810                 return false;
 811         }
 812
 813         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 814         {
 815                 if ((x->Name == servername) && ((ComparePass(this->MakePass(x->RecvPass,this->GetOurChallenge()),password)) || (x->RecvPass == password && (this->GetTheirChallenge().empty()))))
 816                 {
 817                         TreeServer* CheckDupe = Utils->FindServer(sname);
 818                         if (CheckDupe)
 819                         {
 820                                 this->SendError("Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
 821                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
 822                                 return false;
 823                         }
 824                         // Begin the sync here. this kickstarts the
 825                         // other side, waiting in WAIT_AUTH_2 state,
 826                         // into starting their burst, as it shows
 827                         // that we're happy.
 828                         this->LinkState = CONNECTED;
 829                         // we should add the details of this server now
 830                         // to the servers tree, as a child of the root
 831                         // node.
 832                         TreeServer* Node = new TreeServer(this->Utils,this->Instance,sname,description,Utils->TreeRoot,this,x->Hidden);
 833                         Utils->TreeRoot->AddChild(Node);
 834                         params[3] = ":" + params[3];
 835                         Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,sname);
 836                         this->bursting = true;
 837                         this->DoBurst(Node);
 838                         return true;
 839                 }
 840         }
 841         this->SendError("Invalid credentials");
 842         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
 843         return false;
 844 }
 845
 846 bool TreeSocket::Inbound_Server(std::deque<std::string> &params)
 847 {
 848         if (params.size() < 4)
 849                 return false;
 850         irc::string servername = params[0].c_str();
 851         std::string sname = params[0];
 852         std::string password = params[1];
 853         std::string description = params[3];
 854         int hops = atoi(params[2].c_str());
 855
 856         this->InboundServerName = sname;
 857         this->InboundDescription = description;
 858
 859         if (hops)
 860         {
 861                 this->SendError("Server too far away for authentication");
 862                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
 863                 return false;
 864         }
 865
 866         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 867         {
 868                 if ((x->Name == servername) && ((ComparePass(this->MakePass(x->RecvPass,this->GetOurChallenge()),password) || x->RecvPass == password && (this->GetTheirChallenge().empty()))))
 869                 {
 870                         /* First check for instances of the server that are waiting between the inbound and outbound SERVER command */
 871                         TreeSocket* CheckDupeSocket = Utils->FindBurstingServer(sname);
 872                         if (CheckDupeSocket)
 873                         {
 874                                 /* If we find one, we abort the link to prevent a race condition */
 875                                 this->SendError("Negotiation collision");
 876                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists in a negotiating state.");
 877                                 CheckDupeSocket->SendError("Negotiation collision");
 878                                 Instance->SE->DelFd(CheckDupeSocket);
 879                                 CheckDupeSocket->Close();
 880                                 delete CheckDupeSocket;
 881                                 return false;
 882                         }
 883                         /* Now check for fully initialized instances of the server */
 884                         TreeServer* CheckDupe = Utils->FindServer(sname);
 885                         if (CheckDupe)
 886                         {
 887                                 this->SendError("Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
 888                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
 889                                 return false;
 890                         }
 891                         this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
 892                         if (this->Hook)
 893                         {
 894                                 std::string name = InspSocketNameRequest((Module*)Utils->Creator, this->Hook).Send();
 895                                 this->Instance->SNO->WriteToSnoMask('l',"Connection from \2"+sname+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] using transport \2"+name+"\2");
 896                         }
 897
 898                         Utils->AddBurstingServer(sname,this);
 899
 900                         // this is good. Send our details: Our server name and description and hopcount of 0,
 901                         // along with the sendpass from this block.
 902                         this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+this->MakePass(x->SendPass, this->GetTheirChallenge())+" 0 :"+this->Instance->Config->ServerDesc);
 903                         // move to the next state, we are now waiting for THEM.
 904                         this->LinkState = WAIT_AUTH_2;
 905                         return true;
 906                 }
 907         }
 908         this->SendError("Invalid credentials");
 909         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
 910         return false;
 911 }
 912
 913 void TreeSocket::Split(const std::string &line, std::deque<std::string> &n)
 914 {
 915         n.clear();
 916         irc::tokenstream tokens(line);
 917         std::string param;
 918         while (tokens.GetToken(param))
 919         {
 920                 if (!param.empty())
 921                         n.push_back(param);
 922         }
 923         return;
 924 }
 925
 926 bool TreeSocket::ProcessLine(std::string &line)
 927 {
 928         std::deque<std::string> params;
 929         irc::string command;
 930         std::string prefix;
 931
 932         line = line.substr(0, line.find_first_of("\r\n"));
 933
 934         if (line.empty())
 935                 return true;
 936
 937         Instance->Log(DEBUG, "S[%d] <- %s", this->GetFd(), line.c_str());
 938
 939         this->Split(line.c_str(),params);
 940
 941         if (params.empty())
 942                 return true;
 943
 944         if ((params[0][0] == ':') && (params.size() > 1))
 945         {
 946                 prefix = params[0].substr(1);
 947                 params.pop_front();
 948         }
 949         command = params[0].c_str();
 950         params.pop_front();
 951         switch (this->LinkState)
 952         {
 953                 TreeServer* Node;
 954
 955                 case WAIT_AUTH_1:
 956                         // Waiting for SERVER command from remote server. Server initiating
 957                         // the connection sends the first SERVER command, listening server
 958                         // replies with theirs if its happy, then if the initiator is happy,
 959                         // it starts to send its net sync, which starts the merge, otherwise
 960                         // it sends an ERROR.
 961                         if (command == "PASS")
 962                         {
 963                                 /* Silently ignored */
 964                         }
 965                         else if (command == "SERVER")
 966                         {
 967                                 return this->Inbound_Server(params);
 968                         }
 969                         else if (command == "ERROR")
 970                         {
 971                                 return this->Error(params);
 972                         }
 973                         else if (command == "USER")
 974                         {
 975                                 this->SendError("Client connections to this port are prohibited.");
 976                                 return false;
 977                         }
 978                         else if (command == "CAPAB")
 979                         {
 980                                 return this->Capab(params);
 981                         }
 982                         else if ((command == "U") || (command == "S"))
 983                         {
 984                                 this->SendError("Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
 985                                 return false;
 986                         }
 987                         else
 988                         {
 989                                 irc::string error = "Invalid command in negotiation phase: " + command;
 990                                 this->SendError(assign(error));
 991                                 return false;
 992                         }
 993                 break;
 994                 case WAIT_AUTH_2:
 995                         // Waiting for start of other side's netmerge to say they liked our
 996                         // password.
 997                         if (command == "SERVER")
 998                         {
 999                                 // cant do this, they sent it to us in the WAIT_AUTH_1 state!
1000                                 // silently ignore.
1001                                 return true;
1002                         }
1003                         else if ((command == "U") || (command == "S"))
1004                         {
1005                                 this->SendError("Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
1006                                 return false;
1007                         }
1008                         else if (command == "BURST")
1009                         {
1010                                 if (params.size() && Utils->EnableTimeSync)
1011                                 {
1012                                         bool we_have_delta = (Instance->Time(false) != Instance->Time(true));
1013                                         time_t them = atoi(params[0].c_str());
1014                                         time_t delta = them - Instance->Time(false);
1015                                         if ((delta < -300) || (delta > 300))
1016                                         {
1017                                                 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));
1018                                                 SendError("Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than five minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
1019                                                 return false;
1020                                         }
1021                                         else if ((delta < -30) || (delta > 30))
1022                                         {
1023                                                 Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds. Please consider synching your clocks.", abs(delta));
1024                                         }
1025
1026                                         if (!Utils->MasterTime && !we_have_delta)
1027                                         {
1028                                                 this->Instance->SetTimeDelta(delta);
1029                                                 // Send this new timestamp to any other servers
1030                                                 Utils->DoOneToMany(Utils->TreeRoot->GetName(), "TIMESET", params);
1031                                         }
1032                                 }
1033                                 this->LinkState = CONNECTED;
1034                                 Link* lnk = Utils->FindLink(InboundServerName);
1035                                 Node = new TreeServer(this->Utils,this->Instance, InboundServerName, InboundDescription, Utils->TreeRoot, this, lnk ? lnk->Hidden : false);
1036                                 Utils->DelBurstingServer(this);
1037                                 Utils->TreeRoot->AddChild(Node);
1038                                 params.clear();
1039                                 params.push_back(InboundServerName);
1040                                 params.push_back("*");
1041                                 params.push_back("1");
1042                                 params.push_back(":"+InboundDescription);
1043                                 Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,InboundServerName);
1044                                 this->bursting = true;
1045                                 this->DoBurst(Node);
1046                         }
1047                         else if (command == "ERROR")
1048                         {
1049                                 return this->Error(params);
1050                         }
1051                         else if (command == "CAPAB")
1052                         {
1053                                 return this->Capab(params);
1054                         }
1055
1056                 break;
1057                 case LISTENER:
1058                         this->SendError("Internal error -- listening socket accepted its own descriptor!!!");
1059                         return false;
1060                 break;
1061                 case CONNECTING:
1062                         if (command == "SERVER")
1063                         {
1064                                 // another server we connected to, which was in WAIT_AUTH_1 state,
1065                                 // has just sent us their credentials. If we get this far, theyre
1066                                 // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
1067                                 // if we're happy with this, we should send our netburst which
1068                                 // kickstarts the merge.
1069                                 return this->Outbound_Reply_Server(params);
1070                         }
1071                         else if (command == "ERROR")
1072                         {
1073                                 return this->Error(params);
1074                         }
1075                         else if (command == "CAPAB")
1076                         {
1077                                 return this->Capab(params);
1078                         }
1079                 break;
1080                 case CONNECTED:
1081                         // This is the 'authenticated' state, when all passwords
1082                         // have been exchanged and anything past this point is taken
1083                         // as gospel.
1084
1085                         if (!prefix.empty())
1086                         {
1087                                 std::string direction = prefix;
1088                                 userrec* t = this->Instance->FindNick(prefix);
1089                                 if (t)
1090                                 {
1091                                         direction = t->server;
1092                                 }
1093                                 TreeServer* route_back_again = Utils->BestRouteTo(direction);
1094                                 if ((!route_back_again) || (route_back_again->GetSocket() != this))
1095                                 {
1096                                         if (route_back_again)
1097                                                 Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
1098                                         return true;
1099                                 }
1100                                 /* Fix by brain:
1101                                  * When there is activity on the socket, reset the ping counter so
1102                                  * that we're not wasting bandwidth pinging an active server.
1103                                  */
1104                                 route_back_again->SetNextPingTime(time(NULL) + 60);
1105                                 route_back_again->SetPingFlag();
1106                         }
1107                         else
1108                         {
1109                                 prefix = this->GetName();
1110                         }
1111
1112                         if ((command == "MODE") && (params.size() >= 2))
1113                         {
1114                                 chanrec* channel = Instance->FindChan(params[0]);
1115                                 if (channel)
1116                                 {
1117                                         userrec* x = Instance->FindNick(prefix);
1118                                         if (x)
1119                                         {
1120                                                 if (warned.find(x->server) == warned.end())
1121                                                 {
1122                                                         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);
1123                                                         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());
1124                                                         warned[x->server] = x->nick;
1125                                                 }
1126                                         }
1127                                 }
1128                         }
1129
1130                         if (command == "SVSMODE")
1131                         {
1132                                 /* Services expects us to implement
1133                                  * SVSMODE. In inspircd its the same as
1134                                  * MODE anyway.
1135                                  */
1136                                 command = "MODE";
1137                         }
1138                         std::string target;
1139                         /* Yes, know, this is a mess. Its reasonably fast though as we're
1140                          * working with std::string here.
1141                          */
1142                         if ((command == "NICK") && (params.size() >= 8))
1143                         {
1144                                 return this->IntroduceClient(prefix,params);
1145                         }
1146                         else if (command == "FJOIN")
1147                         {
1148                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1149                                 if (ServerSource)
1150                                         Utils->SetRemoteBursting(ServerSource, false);
1151                                 return this->ForceJoin(prefix,params);
1152                         }
1153                         else if (command == "STATS")
1154                         {
1155                                 return this->Stats(prefix, params);
1156                         }
1157                         else if (command == "MOTD")
1158                         {
1159                                 return this->Motd(prefix, params);
1160                         }
1161                         else if (command == "KILL" && Utils->IsServer(prefix))
1162                         {
1163                                 return this->RemoteKill(prefix,params);
1164                         }
1165                         else if (command == "MODULES")
1166                         {
1167                                 return this->Modules(prefix, params);
1168                         }
1169                         else if (command == "ADMIN")
1170                         {
1171                                 return this->Admin(prefix, params);
1172                         }
1173                         else if (command == "SERVER")
1174                         {
1175                                 return this->RemoteServer(prefix,params);
1176                         }
1177                         else if (command == "ERROR")
1178                         {
1179                                 return this->Error(params);
1180                         }
1181                         else if (command == "OPERTYPE")
1182                         {
1183                                 return this->OperType(prefix,params);
1184                         }
1185                         else if (command == "FMODE")
1186                         {
1187                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1188                                 if (ServerSource)
1189                                         Utils->SetRemoteBursting(ServerSource, false);
1190                                 return this->ForceMode(prefix,params);
1191                         }
1192                         else if (command == "FTOPIC")
1193                         {
1194                                 return this->ForceTopic(prefix,params);
1195                         }
1196                         else if (command == "REHASH")
1197                         {
1198                                 return this->RemoteRehash(prefix,params);
1199                         }
1200                         else if (command == "METADATA")
1201                         {
1202                                 return this->MetaData(prefix,params);
1203                         }
1204                         else if (command == "REMSTATUS")
1205                         {
1206                                 return this->RemoveStatus(prefix,params);
1207                         }
1208                         else if (command == "PING")
1209                         {
1210                                 if (prefix.empty())
1211                                         prefix = this->GetName();
1212                                 /*
1213                                  * We just got a ping from a server that's bursting.
1214                                  * This can't be right, so set them to not bursting, and
1215                                  * apply their lines.
1216                                  */
1217                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1218                                 if (ServerSource)
1219                                         Utils->SetRemoteBursting(ServerSource, false);
1220
1221                                 if (this->bursting)
1222                                 {
1223                                         this->bursting = false;
1224                                         Instance->XLines->apply_lines(Utils->lines_to_apply);
1225                                         Utils->lines_to_apply = 0;
1226                                 }
1227
1228                                 return this->LocalPing(prefix,params);
1229                         }
1230                         else if (command == "PONG")
1231                         {
1232                                 if (prefix.empty())
1233                                         prefix = this->GetName();
1234                                 /*
1235                                  * We just got a pong from a server that's bursting.
1236                                  * This can't be right, so set them to not bursting, and
1237                                  * apply their lines.
1238                                  */
1239                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1240                                 if (ServerSource)
1241                                         Utils->SetRemoteBursting(ServerSource, false);
1242
1243                                 if (this->bursting)
1244                                 {
1245                                         this->bursting = false;
1246                                         Instance->XLines->apply_lines(Utils->lines_to_apply);
1247                                         Utils->lines_to_apply = 0;
1248                                 }
1249
1250                                 return this->LocalPong(prefix,params);
1251                         }
1252                         else if (command == "VERSION")
1253                         {
1254                                 return this->ServerVersion(prefix,params);
1255                         }
1256                         else if (command == "FHOST")
1257                         {
1258                                 return this->ChangeHost(prefix,params);
1259                         }
1260                         else if (command == "FNAME")
1261                         {
1262                                 return this->ChangeName(prefix,params);
1263                         }
1264                         else if (command == "ADDLINE")
1265                         {
1266                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1267                                 if (ServerSource)
1268                                         Utils->SetRemoteBursting(ServerSource, false);
1269                                 return this->AddLine(prefix,params);
1270                         }
1271                         else if (command == "SVSNICK")
1272                         {
1273                                 if (prefix.empty())
1274                                 {
1275                                         prefix = this->GetName();
1276                                 }
1277                                 return this->ForceNick(prefix,params);
1278                         }
1279                         else if (command == "OPERQUIT")
1280                         {
1281                                 return this->OperQuit(prefix,params);
1282                         }
1283                         else if (command == "IDLE")
1284                         {
1285                                 return this->Whois(prefix,params);
1286                         }
1287                         else if (command == "PUSH")
1288                         {
1289                                 return this->Push(prefix,params);
1290                         }
1291                         else if (command == "TIMESET")
1292                         {
1293                                 return this->HandleSetTime(prefix, params);
1294                         }
1295                         else if (command == "TIME")
1296                         {
1297                                 return this->Time(prefix,params);
1298                         }
1299                         else if ((command == "KICK") && (Utils->IsServer(prefix)))
1300                         {
1301                                 std::string sourceserv = this->myhost;
1302                                 if (params.size() == 3)
1303                                 {
1304                                         userrec* user = this->Instance->FindNick(params[1]);
1305                                         chanrec* chan = this->Instance->FindChan(params[0]);
1306                                         if (user && chan)
1307                                         {
1308                                                 if (!chan->ServerKickUser(user, params[2].c_str(), false))
1309                                                         /* Yikes, the channels gone! */
1310                                                         delete chan;
1311                                         }
1312                                 }
1313                                 if (!this->InboundServerName.empty())
1314                                 {
1315                                         sourceserv = this->InboundServerName;
1316                                 }
1317                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1318                         }
1319                         else if (command == "SVSJOIN")
1320                         {
1321                                 if (prefix.empty())
1322                                 {
1323                                         prefix = this->GetName();
1324                                 }
1325                                 return this->ServiceJoin(prefix,params);
1326                         }
1327                         else if (command == "SQUIT")
1328                         {
1329                                 if (params.size() == 2)
1330                                 {
1331                                         this->Squit(Utils->FindServer(params[0]),params[1]);
1332                                 }
1333                                 return true;
1334                         }
1335                         else if (command == "OPERNOTICE")
1336                         {
1337                                 std::string sourceserv = this->myhost;
1338                                 if (!this->InboundServerName.empty())
1339                                         sourceserv = this->InboundServerName;
1340                                 if (params.size() >= 1)
1341                                         Instance->WriteOpers("*** From " + sourceserv + ": " + params[0]);
1342                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1343                         }
1344                         else if (command == "MODENOTICE")
1345                         {
1346                                 std::string sourceserv = this->myhost;
1347                                 if (!this->InboundServerName.empty())
1348                                         sourceserv = this->InboundServerName;
1349                                 if (params.size() >= 2)
1350                                 {
1351                                         Instance->WriteMode(params[0].c_str(), WM_AND, "*** From %s: %s", sourceserv.c_str(), params[1].c_str());
1352                                 }
1353                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1354                         }
1355                         else if (command == "SNONOTICE")
1356                         {
1357                                 std::string sourceserv = this->myhost;
1358                                 if (!this->InboundServerName.empty())
1359                                         sourceserv = this->InboundServerName;
1360                                 if (params.size() >= 2)
1361                                 {
1362                                         Instance->SNO->WriteToSnoMask(*(params[0].c_str()), "From " + sourceserv + ": "+ params[1]);
1363                                 }
1364                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1365                         }
1366                         else if (command == "ENDBURST")
1367                         {
1368                                 this->bursting = false;
1369                                 Instance->XLines->apply_lines(Utils->lines_to_apply);
1370                                 Utils->lines_to_apply = 0;
1371                                 std::string sourceserv = this->myhost;
1372                                 if (!this->InboundServerName.empty())
1373                                         sourceserv = this->InboundServerName;
1374                                 this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
1375
1376                                 Event rmode((char*)sourceserv.c_str(), (Module*)Utils->Creator, "new_server");
1377                                 rmode.Send(Instance);
1378
1379                                 return true;
1380                         }
1381                         else
1382                         {
1383                                 // not a special inter-server command.
1384                                 // Emulate the actual user doing the command,
1385                                 // this saves us having a huge ugly parser.
1386                                 userrec* who = this->Instance->FindNick(prefix);
1387                                 std::string sourceserv = this->myhost;
1388                                 if (!this->InboundServerName.empty())
1389                                 {
1390                                         sourceserv = this->InboundServerName;
1391                                 }
1392                                 if ((!who) && (command == "MODE"))
1393                                 {
1394                                         if (Utils->IsServer(prefix))
1395                                         {
1396                                                 const char* modelist[127];
1397                                                 for (size_t i = 0; i < params.size(); i++)
1398                                                         modelist[i] = params[i].c_str();
1399                                                 userrec* fake = new userrec(Instance);
1400                                                 fake->SetFd(FD_MAGIC_NUMBER);
1401                                                 this->Instance->SendMode(modelist, params.size(), fake);
1402
1403                                                 delete fake;
1404                                                 /* Hot potato! pass it on! */
1405                                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1406                                         }
1407                                 }
1408                                 if (who)
1409                                 {
1410                                         if ((command == "NICK") && (params.size() > 0))
1411                                         {
1412                                                 /* On nick messages, check that the nick doesnt
1413                                                  * already exist here. If it does, kill their copy,
1414                                                  * and our copy.
1415                                                  */
1416                                                 userrec* x = this->Instance->FindNick(params[0]);
1417                                                 if ((x) && (x != who))
1418                                                 {
1419                                                         std::deque<std::string> p;
1420                                                         p.push_back(params[0]);
1421                                                         p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
1422                                                         Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
1423                                                         p.clear();
1424                                                         p.push_back(prefix);
1425                                                         p.push_back("Nickname collision");
1426                                                         Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
1427                                                         userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
1428                                                         userrec* y = this->Instance->FindNick(prefix);
1429                                                         if (y)
1430                                                         {
1431                                                                 userrec::QuitUser(this->Instance,y,"Nickname collision");
1432                                                         }
1433                                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1434                                                 }
1435                                         }
1436                                         // its a user
1437                                         target = who->server;
1438                                         const char* strparams[127];
1439                                         for (unsigned int q = 0; q < params.size(); q++)
1440                                         {
1441                                                 strparams[q] = params[q].c_str();
1442                                         }
1443                                         switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
1444                                         {
1445                                                 case CMD_INVALID:
1446                                                         this->SendError("Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
1447                                                         return false;
1448                                                 break;
1449                                                 case CMD_FAILURE:
1450                                                         return true;
1451                                                 break;
1452                                                 default:
1453                                                         /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
1454                                                 break;
1455                                         }
1456                                 }
1457                                 else
1458                                 {
1459                                         // its not a user. Its either a server, or somethings screwed up.
1460                                         if (Utils->IsServer(prefix))
1461                                                 target = this->Instance->Config->ServerName;
1462                                         else
1463                                                 return true;
1464                                 }
1465                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1466
1467                         }
1468                         return true;
1469                 break;
1470         }
1471         return true;
1472 }
1473
1474 std::string TreeSocket::GetName()
1475 {
1476         std::string sourceserv = this->myhost;
1477         if (!this->InboundServerName.empty())
1478         {
1479                 sourceserv = this->InboundServerName;
1480         }
1481         return sourceserv;
1482 }
1483
1484 void TreeSocket::OnTimeout()
1485 {
1486         if (this->LinkState == CONNECTING)
1487         {
1488                 this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out.");
1489                 Link* MyLink = Utils->FindLink(myhost);
1490                 if (MyLink)
1491                         Utils->DoFailOver(MyLink);
1492         }
1493 }
1494
1495 void TreeSocket::OnClose()
1496 {
1497         // Connection closed.
1498         // If the connection is fully up (state CONNECTED)
1499         // then propogate a netsplit to all peers.
1500         std::string quitserver = this->myhost;
1501         if (!this->InboundServerName.empty())
1502         {
1503                 quitserver = this->InboundServerName;
1504         }
1505         TreeServer* s = Utils->FindServer(quitserver);
1506         if (s)
1507         {
1508                 Squit(s,"Remote host closed the connection");
1509         }
1510
1511         if (!quitserver.empty())
1512         {
1513                 this->Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' failed.",quitserver.c_str());
1514                 time_t server_uptime = Instance->Time() - this->age;
1515                 if (server_uptime)
1516                         Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' was established for %s", quitserver.c_str(), Utils->Creator->TimeToStr(server_uptime).c_str());
1517         }
1518 }
1519
1520 int TreeSocket::OnIncomingConnection(int newsock, char* ip)
1521 {
1522         /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
1523          * or discovering if this port is the server port, we don't allow connections from any
1524          * IPs for which we don't have a link block.
1525          */
1526         bool found = false;
1527
1528         found = (std::find(Utils->ValidIPs.begin(), Utils->ValidIPs.end(), ip) != Utils->ValidIPs.end());
1529         if (!found)
1530         {
1531                 for (vector<std::string>::iterator i = Utils->ValidIPs.begin(); i != Utils->ValidIPs.end(); i++)
1532                         if (irc::sockets::MatchCIDR(ip, (*i).c_str()))
1533                                 found = true;
1534
1535                 if (!found)
1536                 {
1537                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from %s denied (no link blocks with that IP address)", ip);
1538                         close(newsock);
1539                         return false;
1540                 }
1541         }
1542
1543         TreeSocket* s = new TreeSocket(this->Utils, this->Instance, newsock, ip, this->Hook);
1544         s = s; /* Whinge whinge whinge, thats all GCC ever does. */
1545         return true;
1546 }