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                 // NOTE: This is safe with kill hiding on, as RemoteKill is only reached if we have a server prefix.
 350                 // in short this is not executed for USERS.
 351                 who->Write(":%s KILL %s :%s (%s)", prefix.c_str(), who->nick, prefix.c_str(), reason.c_str());
 352                 userrec::QuitUser(this->Instance,who,reason);
 353         }
 354         return true;
 355 }
 356
 357 bool TreeSocket::LocalPong(const std::string &prefix, std::deque<std::string> &params)
 358 {
 359         if (params.size() < 1)
 360                 return true;
 361
 362         if (params.size() == 1)
 363         {
 364                 TreeServer* ServerSource = Utils->FindServer(prefix);
 365                 if (ServerSource)
 366                 {
 367                         ServerSource->SetPingFlag();
 368                         ServerSource->rtt = Instance->Time() - ServerSource->LastPing;
 369                 }
 370         }
 371         else
 372         {
 373                 std::string forwardto = params[1];
 374                 if (forwardto == this->Instance->Config->ServerName)
 375                 {
 376                         /*
 377                          * this is a PONG for us
 378                          * if the prefix is a user, check theyre local, and if they are,
 379                          * dump the PONG reply back to their fd. If its a server, do nowt.
 380                          * Services might want to send these s->s, but we dont need to yet.
 381                          */
 382                         userrec* u = this->Instance->FindNick(prefix);
 383                         if (u)
 384                         {
 385                                 u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
 386                         }
 387                 }
 388                 else
 389                 {
 390                         // not for us, pass it on :)
 391                         Utils->DoOneToOne(prefix,"PONG",params,forwardto);
 392                 }
 393         }
 394
 395         return true;
 396 }
 397
 398 bool TreeSocket::MetaData(const std::string &prefix, std::deque<std::string> &params)
 399 {
 400         if (params.size() < 2)
 401                 return true;
 402         else if (params.size() < 3)
 403                 params.push_back("");
 404         TreeServer* ServerSource = Utils->FindServer(prefix);
 405         if (ServerSource)
 406         {
 407                 Utils->SetRemoteBursting(ServerSource, false);
 408
 409                 if (params[0] == "*")
 410                 {
 411                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
 412                 }
 413                 else if (*(params[0].c_str()) == '#')
 414                 {
 415                         chanrec* c = this->Instance->FindChan(params[0]);
 416                         if (c)
 417                         {
 418                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
 419                         }
 420                 }
 421                 else if (*(params[0].c_str()) != '#')
 422                 {
 423                         userrec* u = this->Instance->FindNick(params[0]);
 424                         if (u)
 425                         {
 426                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
 427                         }
 428                 }
 429         }
 430
 431         params[2] = ":" + params[2];
 432         Utils->DoOneToAllButSender(prefix,"METADATA",params,prefix);
 433         return true;
 434 }
 435
 436 bool TreeSocket::ServerVersion(const std::string &prefix, std::deque<std::string> &params)
 437 {
 438         if (params.size() < 1)
 439                 return true;
 440
 441         TreeServer* ServerSource = Utils->FindServer(prefix);
 442
 443         if (ServerSource)
 444         {
 445                 ServerSource->SetVersion(params[0]);
 446         }
 447         params[0] = ":" + params[0];
 448         Utils->DoOneToAllButSender(prefix,"VERSION",params,prefix);
 449         return true;
 450 }
 451
 452 bool TreeSocket::ChangeHost(const std::string &prefix, std::deque<std::string> &params)
 453 {
 454         if (params.size() < 1)
 455                 return true;
 456         userrec* u = this->Instance->FindNick(prefix);
 457
 458         if (u)
 459         {
 460                 u->ChangeDisplayedHost(params[0].c_str());
 461                 Utils->DoOneToAllButSender(prefix,"FHOST",params,u->server);
 462         }
 463         return true;
 464 }
 465
 466 bool TreeSocket::AddLine(const std::string &prefix, std::deque<std::string> &params)
 467 {
 468         if (params.size() < 6)
 469                 return true;
 470         bool propogate = false;
 471         if (!this->bursting)
 472                 Utils->lines_to_apply = 0;
 473         switch (*(params[0].c_str()))
 474         {
 475                 case 'Z':
 476                         propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 477                         Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 478                         if (propogate)
 479                                 Utils->lines_to_apply |= APPLY_ZLINES;
 480                 break;
 481                 case 'Q':
 482                         propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 483                         Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 484                         if (propogate)
 485                                 Utils->lines_to_apply |= APPLY_QLINES;
 486                 break;
 487                 case 'E':
 488                         propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 489                         Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 490                 break;
 491                 case 'G':
 492                         propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 493                         Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
 494                         if (propogate)
 495                                 Utils->lines_to_apply |= APPLY_GLINES;
 496                 break;
 497                 case 'K':
 498                         propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
 499                         if (propogate)
 500                                 Utils->lines_to_apply |= APPLY_KLINES;
 501                 break;
 502                 default:
 503                         /* Just in case... */
 504                         this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
 505                         propogate = false;
 506                 break;
 507         }
 508         /* Send it on its way */
 509         if (propogate)
 510         {
 511                 if (atoi(params[4].c_str()))
 512                 {
 513                         time_t c_requires_crap = ConvToInt(params[4]) + Instance->Time();
 514                         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());
 515                 }
 516                 else
 517                 {
 518                         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());
 519                 }
 520                 params[5] = ":" + params[5];
 521                 Utils->DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
 522         }
 523         if (!this->bursting)
 524         {
 525                 Instance->XLines->apply_lines(Utils->lines_to_apply);
 526                 Utils->lines_to_apply = 0;
 527         }
 528         return true;
 529 }
 530
 531 bool TreeSocket::ChangeName(const std::string &prefix, std::deque<std::string> &params)
 532 {
 533         if (params.size() < 1)
 534                 return true;
 535         userrec* u = this->Instance->FindNick(prefix);
 536         if (u)
 537         {
 538                 u->ChangeName(params[0].c_str());
 539                 params[0] = ":" + params[0];
 540                 Utils->DoOneToAllButSender(prefix,"FNAME",params,u->server);
 541         }
 542         return true;
 543 }
 544
 545 bool TreeSocket::Whois(const std::string &prefix, std::deque<std::string> &params)
 546 {
 547         if (params.size() < 1)
 548                 return true;
 549         userrec* u = this->Instance->FindNick(prefix);
 550         if (u)
 551         {
 552                 // an incoming request
 553                 if (params.size() == 1)
 554                 {
 555                         userrec* x = this->Instance->FindNick(params[0]);
 556                         if ((x) && (IS_LOCAL(x)))
 557                         {
 558                                 userrec* x = this->Instance->FindNick(params[0]);
 559                                 char signon[MAXBUF];
 560                                 char idle[MAXBUF];
 561                                 snprintf(signon, MAXBUF, "%lu", (unsigned long)x->signon);
 562                                 snprintf(idle, MAXBUF, "%lu", (unsigned long)abs((x->idle_lastmsg) - Instance->Time(true)));
 563                                 std::deque<std::string> par;
 564                                 par.push_back(prefix);
 565                                 par.push_back(signon);
 566                                 par.push_back(idle);
 567                                 // ours, we're done, pass it BACK
 568                                 Utils->DoOneToOne(params[0], "IDLE", par, u->server);
 569                         }
 570                         else
 571                         {
 572                                 // not ours pass it on
 573                                 if (x)
 574                                         Utils->DoOneToOne(prefix, "IDLE", params, x->server);
 575                         }
 576                 }
 577                 else if (params.size() == 3)
 578                 {
 579                         std::string who_did_the_whois = params[0];
 580                         userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
 581                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
 582                         {
 583                                 // an incoming reply to a whois we sent out
 584                                 std::string nick_whoised = prefix;
 585                                 unsigned long signon = atoi(params[1].c_str());
 586                                 unsigned long idle = atoi(params[2].c_str());
 587                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
 588                                 {
 589                                         do_whois(this->Instance, who_to_send_to, u, signon, idle, nick_whoised.c_str());
 590                                 }
 591                         }
 592                         else
 593                         {
 594                                 // not ours, pass it on
 595                                 if (who_to_send_to)
 596                                         Utils->DoOneToOne(prefix, "IDLE", params, who_to_send_to->server);
 597                         }
 598                 }
 599         }
 600         return true;
 601 }
 602
 603 bool TreeSocket::Push(const std::string &prefix, std::deque<std::string> &params)
 604 {
 605         if (params.size() < 2)
 606                 return true;
 607         userrec* u = this->Instance->FindNick(params[0]);
 608         if (!u)
 609                 return true;
 610         if (IS_LOCAL(u))
 611         {
 612                 u->Write(params[1]);
 613         }
 614         else
 615         {
 616                 // continue the raw onwards
 617                 params[1] = ":" + params[1];
 618                 Utils->DoOneToOne(prefix,"PUSH",params,u->server);
 619         }
 620         return true;
 621 }
 622
 623 bool TreeSocket::HandleSetTime(const std::string &prefix, std::deque<std::string> &params)
 624 {
 625         if (!params.size() || !Utils->EnableTimeSync)
 626                 return true;
 627
 628         bool force = false;
 629
 630         if ((params.size() == 2) && (params[1] == "FORCE"))
 631                 force = true;
 632
 633         time_t them = atoi(params[0].c_str());
 634         time_t us = Instance->Time(false);
 635
 636         time_t diff = them - us;
 637
 638         Utils->DoOneToAllButSender(prefix, "TIMESET", params, prefix);
 639
 640         if (force || (them != us))
 641         {
 642                 time_t old = Instance->SetTimeDelta(diff);
 643                 Instance->Log(DEBUG, "TS (diff %d) from %s applied (old delta was %d)", diff, prefix.c_str(), old);
 644         }
 645
 646         return true;
 647 }
 648
 649 bool TreeSocket::Time(const std::string &prefix, std::deque<std::string> &params)
 650 {
 651         // :source.server TIME remote.server sendernick
 652         // :remote.server TIME source.server sendernick TS
 653         if (params.size() == 2)
 654         {
 655                 // someone querying our time?
 656                 if (this->Instance->Config->ServerName == params[0])
 657                 {
 658                         userrec* u = this->Instance->FindNick(params[1]);
 659                         if (u)
 660                         {
 661                                 params.push_back(ConvToStr(Instance->Time(false)));
 662                                 params[0] = prefix;
 663                                 Utils->DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
 664                         }
 665                 }
 666                 else
 667                 {
 668                         // not us, pass it on
 669                         userrec* u = this->Instance->FindNick(params[1]);
 670                         if (u)
 671                                 Utils->DoOneToOne(prefix,"TIME",params,params[0]);
 672                 }
 673         }
 674         else if (params.size() == 3)
 675         {
 676                 // a response to a previous TIME
 677                 userrec* u = this->Instance->FindNick(params[1]);
 678                 if ((u) && (IS_LOCAL(u)))
 679                 {
 680                         time_t rawtime = atol(params[2].c_str());
 681                         struct tm * timeinfo;
 682                         timeinfo = localtime(&rawtime);
 683                         char tms[26];
 684                         snprintf(tms,26,"%s",asctime(timeinfo));
 685                         tms[24] = 0;
 686                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
 687                 }
 688                 else
 689                 {
 690                         if (u)
 691                                 Utils->DoOneToOne(prefix,"TIME",params,u->server);
 692                 }
 693         }
 694         return true;
 695 }
 696
 697 bool TreeSocket::LocalPing(const std::string &prefix, std::deque<std::string> &params)
 698 {
 699         if (params.size() < 1)
 700                 return true;
 701         if (params.size() == 1)
 702         {
 703                 std::string stufftobounce = params[0];
 704                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
 705                 return true;
 706         }
 707         else
 708         {
 709                 std::string forwardto = params[1];
 710                 if (forwardto == this->Instance->Config->ServerName)
 711                 {
 712                         // this is a ping for us, send back PONG to the requesting server
 713                         params[1] = params[0];
 714                         params[0] = forwardto;
 715                         Utils->DoOneToOne(forwardto,"PONG",params,params[1]);
 716                 }
 717                 else
 718                 {
 719                         // not for us, pass it on :)
 720                         Utils->DoOneToOne(prefix,"PING",params,forwardto);
 721                 }
 722                 return true;
 723         }
 724 }
 725
 726 /** TODO: This creates a total mess of output and needs to really use irc::modestacker.
 727  */
 728 bool TreeSocket::RemoveStatus(const std::string &prefix, std::deque<std::string> &params)
 729 {
 730         if (params.size() < 1)
 731                 return true;
 732         chanrec* c = Instance->FindChan(params[0]);
 733         if (c)
 734         {
 735                 for (char modeletter = 'A'; modeletter <= 'z'; modeletter++)
 736                 {
 737                         ModeHandler* mh = Instance->Modes->FindMode(modeletter, MODETYPE_CHANNEL);
 738                         if (mh)
 739                                 mh->RemoveMode(c);
 740                 }
 741         }
 742         return true;
 743 }
 744
 745 bool TreeSocket::RemoteServer(const std::string &prefix, std::deque<std::string> &params)
 746 {
 747         if (params.size() < 4)
 748                 return false;
 749         std::string servername = params[0];
 750         std::string password = params[1];
 751         // hopcount is not used for a remote server, we calculate this ourselves
 752         std::string description = params[3];
 753         TreeServer* ParentOfThis = Utils->FindServer(prefix);
 754         if (!ParentOfThis)
 755         {
 756                 this->SendError("Protocol error - Introduced remote server from unknown server "+prefix);
 757                 return false;
 758         }
 759         TreeServer* CheckDupe = Utils->FindServer(servername);
 760         if (CheckDupe)
 761         {
 762                 this->SendError("Server "+servername+" already exists!");
 763                 this->Instance->SNO->WriteToSnoMask('l',"Server \2"+servername+"\2 being introduced from \2" + prefix + "\2 denied, already exists. Closing link with " + prefix);
 764                 return false;
 765         }
 766         Link* lnk = Utils->FindLink(servername);
 767         TreeServer* Node = new TreeServer(this->Utils,this->Instance,servername,description,ParentOfThis,NULL, lnk ? lnk->Hidden : false);
 768         ParentOfThis->AddChild(Node);
 769         params[3] = ":" + params[3];
 770         Utils->SetRemoteBursting(Node, true);
 771         Utils->DoOneToAllButSender(prefix,"SERVER",params,prefix);
 772         this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
 773         return true;
 774 }
 775
 776 bool TreeSocket::ComparePass(const std::string &ours, const std::string &theirs)
 777 {
 778         if ((!strncmp(ours.c_str(), "HMAC-SHA256:", 12)) || (!strncmp(theirs.c_str(), "HMAC-SHA256:", 12)))
 779         {
 780                 /* One or both of us specified hmac sha256, but we don't have sha256 module loaded!
 781                  * We can't allow this password as valid.
 782                  */
 783                 if (!Instance->FindModule("m_sha256.so") || !Utils->ChallengeResponse)
 784                                 return false;
 785                 else
 786                         /* Straight string compare of hashes */
 787                         return ours == theirs;
 788         }
 789         else
 790                 /* Straight string compare of plaintext */
 791                 return ours == theirs;
 792 }
 793
 794 bool TreeSocket::Outbound_Reply_Server(std::deque<std::string> &params)
 795 {
 796         if (params.size() < 4)
 797                 return false;
 798
 799         irc::string servername = params[0].c_str();
 800         std::string sname = params[0];
 801         std::string password = params[1];
 802         std::string description = params[3];
 803         int hops = atoi(params[2].c_str());
 804
 805         this->InboundServerName = sname;
 806         this->InboundDescription = description;
 807
 808         if (!sentcapab)
 809                 this->SendCapabilities();
 810
 811         if (hops)
 812         {
 813                 this->SendError("Server too far away for authentication");
 814                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
 815                 return false;
 816         }
 817
 818         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 819         {
 820                 if ((x->Name == servername) && ((ComparePass(this->MakePass(x->RecvPass,this->GetOurChallenge()),password)) || (x->RecvPass == password && (this->GetTheirChallenge().empty()))))
 821                 {
 822                         TreeServer* CheckDupe = Utils->FindServer(sname);
 823                         if (CheckDupe)
 824                         {
 825                                 this->SendError("Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
 826                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
 827                                 return false;
 828                         }
 829                         // Begin the sync here. this kickstarts the
 830                         // other side, waiting in WAIT_AUTH_2 state,
 831                         // into starting their burst, as it shows
 832                         // that we're happy.
 833                         this->LinkState = CONNECTED;
 834                         // we should add the details of this server now
 835                         // to the servers tree, as a child of the root
 836                         // node.
 837                         TreeServer* Node = new TreeServer(this->Utils,this->Instance,sname,description,Utils->TreeRoot,this,x->Hidden);
 838                         Utils->TreeRoot->AddChild(Node);
 839                         params[3] = ":" + params[3];
 840                         Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,sname);
 841                         this->bursting = true;
 842                         this->DoBurst(Node);
 843                         return true;
 844                 }
 845         }
 846         this->SendError("Invalid credentials");
 847         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
 848         return false;
 849 }
 850
 851 bool TreeSocket::Inbound_Server(std::deque<std::string> &params)
 852 {
 853         if (params.size() < 4)
 854                 return false;
 855         irc::string servername = params[0].c_str();
 856         std::string sname = params[0];
 857         std::string password = params[1];
 858         std::string description = params[3];
 859         int hops = atoi(params[2].c_str());
 860
 861         this->InboundServerName = sname;
 862         this->InboundDescription = description;
 863
 864         if (!sentcapab)
 865                 this->SendCapabilities();
 866
 867         if (hops)
 868         {
 869                 this->SendError("Server too far away for authentication");
 870                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
 871                 return false;
 872         }
 873
 874         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 875         {
 876                 if ((x->Name == servername) && ((ComparePass(this->MakePass(x->RecvPass,this->GetOurChallenge()),password) || x->RecvPass == password && (this->GetTheirChallenge().empty()))))
 877                 {
 878                         /* First check for instances of the server that are waiting between the inbound and outbound SERVER command */
 879                         TreeSocket* CheckDupeSocket = Utils->FindBurstingServer(sname);
 880                         if (CheckDupeSocket)
 881                         {
 882                                 /* If we find one, we abort the link to prevent a race condition */
 883                                 this->SendError("Negotiation collision");
 884                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists in a negotiating state.");
 885                                 CheckDupeSocket->SendError("Negotiation collision");
 886                                 Instance->SE->DelFd(CheckDupeSocket);
 887                                 CheckDupeSocket->Close();
 888                                 return false;
 889                         }
 890                         /* Now check for fully initialized instances of the server */
 891                         TreeServer* CheckDupe = Utils->FindServer(sname);
 892                         if (CheckDupe)
 893                         {
 894                                 this->SendError("Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
 895                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
 896                                 return false;
 897                         }
 898                         this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
 899                         if (this->Hook)
 900                         {
 901                                 std::string name = InspSocketNameRequest((Module*)Utils->Creator, this->Hook).Send();
 902                                 this->Instance->SNO->WriteToSnoMask('l',"Connection from \2"+sname+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] using transport \2"+name+"\2");
 903                         }
 904
 905                         Utils->AddBurstingServer(sname,this);
 906
 907                         // this is good. Send our details: Our server name and description and hopcount of 0,
 908                         // along with the sendpass from this block.
 909                         this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+this->MakePass(x->SendPass, this->GetTheirChallenge())+" 0 :"+this->Instance->Config->ServerDesc);
 910                         // move to the next state, we are now waiting for THEM.
 911                         this->LinkState = WAIT_AUTH_2;
 912                         return true;
 913                 }
 914         }
 915         this->SendError("Invalid credentials");
 916         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
 917         return false;
 918 }
 919
 920 void TreeSocket::Split(const std::string &line, std::deque<std::string> &n)
 921 {
 922         n.clear();
 923         irc::tokenstream tokens(line);
 924         std::string param;
 925         while (tokens.GetToken(param))
 926         {
 927                 if (!param.empty())
 928                         n.push_back(param);
 929         }
 930         return;
 931 }
 932
 933 bool TreeSocket::ProcessLine(std::string &line)
 934 {
 935         std::deque<std::string> params;
 936         irc::string command;
 937         std::string prefix;
 938
 939         line = line.substr(0, line.find_first_of("\r\n"));
 940
 941         if (line.empty())
 942                 return true;
 943
 944         Instance->Log(DEBUG, "S[%d] <- %s", this->GetFd(), line.c_str());
 945
 946         this->Split(line.c_str(),params);
 947
 948         if (params.empty())
 949                 return true;
 950
 951         if ((params[0][0] == ':') && (params.size() > 1))
 952         {
 953                 prefix = params[0].substr(1);
 954                 params.pop_front();
 955         }
 956         command = params[0].c_str();
 957         params.pop_front();
 958         switch (this->LinkState)
 959         {
 960                 TreeServer* Node;
 961
 962                 case WAIT_AUTH_1:
 963                         // Waiting for SERVER command from remote server. Server initiating
 964                         // the connection sends the first SERVER command, listening server
 965                         // replies with theirs if its happy, then if the initiator is happy,
 966                         // it starts to send its net sync, which starts the merge, otherwise
 967                         // it sends an ERROR.
 968                         if (command == "PASS")
 969                         {
 970                                 /* Silently ignored */
 971                         }
 972                         else if (command == "SERVER")
 973                         {
 974                                 return this->Inbound_Server(params);
 975                         }
 976                         else if (command == "ERROR")
 977                         {
 978                                 return this->Error(params);
 979                         }
 980                         else if (command == "USER")
 981                         {
 982                                 this->SendError("Client connections to this port are prohibited.");
 983                                 return false;
 984                         }
 985                         else if (command == "CAPAB")
 986                         {
 987                                 return this->Capab(params);
 988                         }
 989                         else if ((command == "U") || (command == "S"))
 990                         {
 991                                 this->SendError("Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
 992                                 return false;
 993                         }
 994                         else
 995                         {
 996                                 irc::string error = "Invalid command in negotiation phase: " + command;
 997                                 this->SendError(assign(error));
 998                                 return false;
 999                         }
1000                 break;
1001                 case WAIT_AUTH_2:
1002                         // Waiting for start of other side's netmerge to say they liked our
1003                         // password.
1004                         if (command == "SERVER")
1005                         {
1006                                 // cant do this, they sent it to us in the WAIT_AUTH_1 state!
1007                                 // silently ignore.
1008                                 return true;
1009                         }
1010                         else if ((command == "U") || (command == "S"))
1011                         {
1012                                 this->SendError("Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
1013                                 return false;
1014                         }
1015                         else if (command == "BURST")
1016                         {
1017                                 if (params.size() && Utils->EnableTimeSync)
1018                                 {
1019                                         bool we_have_delta = (Instance->Time(false) != Instance->Time(true));
1020                                         time_t them = atoi(params[0].c_str());
1021                                         time_t delta = them - Instance->Time(false);
1022                                         if ((delta < -300) || (delta > 300))
1023                                         {
1024                                                 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));
1025                                                 SendError("Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than five minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
1026                                                 return false;
1027                                         }
1028                                         else if ((delta < -30) || (delta > 30))
1029                                         {
1030                                                 Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds. Please consider synching your clocks.", abs(delta));
1031                                         }
1032
1033                                         if (!Utils->MasterTime && !we_have_delta)
1034                                         {
1035                                                 this->Instance->SetTimeDelta(delta);
1036                                                 // Send this new timestamp to any other servers
1037                                                 Utils->DoOneToMany(Utils->TreeRoot->GetName(), "TIMESET", params);
1038                                         }
1039                                 }
1040                                 this->LinkState = CONNECTED;
1041                                 Link* lnk = Utils->FindLink(InboundServerName);
1042                                 Node = new TreeServer(this->Utils,this->Instance, InboundServerName, InboundDescription, Utils->TreeRoot, this, lnk ? lnk->Hidden : false);
1043                                 Utils->DelBurstingServer(this);
1044                                 Utils->TreeRoot->AddChild(Node);
1045                                 params.clear();
1046                                 params.push_back(InboundServerName);
1047                                 params.push_back("*");
1048                                 params.push_back("1");
1049                                 params.push_back(":"+InboundDescription);
1050                                 Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,InboundServerName);
1051                                 this->bursting = true;
1052                                 this->DoBurst(Node);
1053                         }
1054                         else if (command == "ERROR")
1055                         {
1056                                 return this->Error(params);
1057                         }
1058                         else if (command == "CAPAB")
1059                         {
1060                                 return this->Capab(params);
1061                         }
1062
1063                 break;
1064                 case LISTENER:
1065                         this->SendError("Internal error -- listening socket accepted its own descriptor!!!");
1066                         return false;
1067                 break;
1068                 case CONNECTING:
1069                         if (command == "SERVER")
1070                         {
1071                                 // another server we connected to, which was in WAIT_AUTH_1 state,
1072                                 // has just sent us their credentials. If we get this far, theyre
1073                                 // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
1074                                 // if we're happy with this, we should send our netburst which
1075                                 // kickstarts the merge.
1076                                 return this->Outbound_Reply_Server(params);
1077                         }
1078                         else if (command == "ERROR")
1079                         {
1080                                 return this->Error(params);
1081                         }
1082                         else if (command == "CAPAB")
1083                         {
1084                                 return this->Capab(params);
1085                         }
1086                 break;
1087                 case CONNECTED:
1088                         // This is the 'authenticated' state, when all passwords
1089                         // have been exchanged and anything past this point is taken
1090                         // as gospel.
1091
1092                         if (!prefix.empty())
1093                         {
1094                                 std::string direction = prefix;
1095                                 userrec* t = this->Instance->FindNick(prefix);
1096                                 if (t)
1097                                 {
1098                                         direction = t->server;
1099                                 }
1100                                 TreeServer* route_back_again = Utils->BestRouteTo(direction);
1101                                 if ((!route_back_again) || (route_back_again->GetSocket() != this))
1102                                 {
1103                                         if (route_back_again)
1104                                                 Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
1105                                         return true;
1106                                 }
1107                                 /* Fix by brain:
1108                                  * When there is activity on the socket, reset the ping counter so
1109                                  * that we're not wasting bandwidth pinging an active server.
1110                                  */
1111                                 route_back_again->SetNextPingTime(time(NULL) + 60);
1112                                 route_back_again->SetPingFlag();
1113                         }
1114                         else
1115                         {
1116                                 prefix = this->GetName();
1117                         }
1118
1119                         if ((command == "MODE") && (params.size() >= 2))
1120                         {
1121                                 chanrec* channel = Instance->FindChan(params[0]);
1122                                 if (channel)
1123                                 {
1124                                         userrec* x = Instance->FindNick(prefix);
1125                                         if (x)
1126                                         {
1127                                                 if (warned.find(x->server) == warned.end())
1128                                                 {
1129                                                         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);
1130                                                         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());
1131                                                         warned[x->server] = x->nick;
1132                                                 }
1133                                         }
1134                                 }
1135                         }
1136
1137                         if (command == "SVSMODE")
1138                         {
1139                                 /* Services expects us to implement
1140                                  * SVSMODE. In inspircd its the same as
1141                                  * MODE anyway.
1142                                  */
1143                                 command = "MODE";
1144                         }
1145                         std::string target;
1146                         /* Yes, know, this is a mess. Its reasonably fast though as we're
1147                          * working with std::string here.
1148                          */
1149                         if ((command == "NICK") && (params.size() >= 8))
1150                         {
1151                                 return this->IntroduceClient(prefix,params);
1152                         }
1153                         else if (command == "FJOIN")
1154                         {
1155                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1156                                 if (ServerSource)
1157                                         Utils->SetRemoteBursting(ServerSource, false);
1158                                 return this->ForceJoin(prefix,params);
1159                         }
1160                         else if (command == "STATS")
1161                         {
1162                                 return this->Stats(prefix, params);
1163                         }
1164                         else if (command == "MOTD")
1165                         {
1166                                 return this->Motd(prefix, params);
1167                         }
1168                         else if (command == "KILL" && Utils->IsServer(prefix))
1169                         {
1170                                 return this->RemoteKill(prefix,params);
1171                         }
1172                         else if (command == "MODULES")
1173                         {
1174                                 return this->Modules(prefix, params);
1175                         }
1176                         else if (command == "ADMIN")
1177                         {
1178                                 return this->Admin(prefix, params);
1179                         }
1180                         else if (command == "SERVER")
1181                         {
1182                                 return this->RemoteServer(prefix,params);
1183                         }
1184                         else if (command == "ERROR")
1185                         {
1186                                 return this->Error(params);
1187                         }
1188                         else if (command == "OPERTYPE")
1189                         {
1190                                 return this->OperType(prefix,params);
1191                         }
1192                         else if (command == "FMODE")
1193                         {
1194                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1195                                 if (ServerSource)
1196                                         Utils->SetRemoteBursting(ServerSource, false);
1197                                 return this->ForceMode(prefix,params);
1198                         }
1199                         else if (command == "FTOPIC")
1200                         {
1201                                 return this->ForceTopic(prefix,params);
1202                         }
1203                         else if (command == "REHASH")
1204                         {
1205                                 return this->RemoteRehash(prefix,params);
1206                         }
1207                         else if (command == "METADATA")
1208                         {
1209                                 return this->MetaData(prefix,params);
1210                         }
1211                         else if (command == "REMSTATUS")
1212                         {
1213                                 return this->RemoveStatus(prefix,params);
1214                         }
1215                         else if (command == "PING")
1216                         {
1217                                 if (prefix.empty())
1218                                         prefix = this->GetName();
1219                                 /*
1220                                  * We just got a ping from a server that's bursting.
1221                                  * This can't be right, so set them to not bursting, and
1222                                  * apply their lines.
1223                                  */
1224                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1225                                 if (ServerSource)
1226                                         Utils->SetRemoteBursting(ServerSource, false);
1227
1228                                 if (this->bursting)
1229                                 {
1230                                         this->bursting = false;
1231                                         Instance->XLines->apply_lines(Utils->lines_to_apply);
1232                                         Utils->lines_to_apply = 0;
1233                                 }
1234
1235                                 return this->LocalPing(prefix,params);
1236                         }
1237                         else if (command == "PONG")
1238                         {
1239                                 if (prefix.empty())
1240                                         prefix = this->GetName();
1241                                 /*
1242                                  * We just got a pong from a server that's bursting.
1243                                  * This can't be right, so set them to not bursting, and
1244                                  * apply their lines.
1245                                  */
1246                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1247                                 if (ServerSource)
1248                                         Utils->SetRemoteBursting(ServerSource, false);
1249
1250                                 if (this->bursting)
1251                                 {
1252                                         this->bursting = false;
1253                                         Instance->XLines->apply_lines(Utils->lines_to_apply);
1254                                         Utils->lines_to_apply = 0;
1255                                 }
1256
1257                                 return this->LocalPong(prefix,params);
1258                         }
1259                         else if (command == "VERSION")
1260                         {
1261                                 return this->ServerVersion(prefix,params);
1262                         }
1263                         else if (command == "FHOST")
1264                         {
1265                                 return this->ChangeHost(prefix,params);
1266                         }
1267                         else if (command == "FNAME")
1268                         {
1269                                 return this->ChangeName(prefix,params);
1270                         }
1271                         else if (command == "ADDLINE")
1272                         {
1273                                 TreeServer* ServerSource = Utils->FindServer(prefix);
1274                                 if (ServerSource)
1275                                         Utils->SetRemoteBursting(ServerSource, false);
1276                                 return this->AddLine(prefix,params);
1277                         }
1278                         else if (command == "SVSNICK")
1279                         {
1280                                 if (prefix.empty())
1281                                 {
1282                                         prefix = this->GetName();
1283                                 }
1284                                 return this->ForceNick(prefix,params);
1285                         }
1286                         else if (command == "OPERQUIT")
1287                         {
1288                                 return this->OperQuit(prefix,params);
1289                         }
1290                         else if (command == "IDLE")
1291                         {
1292                                 return this->Whois(prefix,params);
1293                         }
1294                         else if (command == "PUSH")
1295                         {
1296                                 return this->Push(prefix,params);
1297                         }
1298                         else if (command == "TIMESET")
1299                         {
1300                                 return this->HandleSetTime(prefix, params);
1301                         }
1302                         else if (command == "TIME")
1303                         {
1304                                 return this->Time(prefix,params);
1305                         }
1306                         else if ((command == "KICK") && (Utils->IsServer(prefix)))
1307                         {
1308                                 std::string sourceserv = this->myhost;
1309                                 if (params.size() == 3)
1310                                 {
1311                                         userrec* user = this->Instance->FindNick(params[1]);
1312                                         chanrec* chan = this->Instance->FindChan(params[0]);
1313                                         if (user && chan)
1314                                         {
1315                                                 if (!chan->ServerKickUser(user, params[2].c_str(), false))
1316                                                         /* Yikes, the channels gone! */
1317                                                         delete chan;
1318                                         }
1319                                 }
1320                                 if (!this->InboundServerName.empty())
1321                                 {
1322                                         sourceserv = this->InboundServerName;
1323                                 }
1324                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1325                         }
1326                         else if (command == "SVSJOIN")
1327                         {
1328                                 if (prefix.empty())
1329                                 {
1330                                         prefix = this->GetName();
1331                                 }
1332                                 return this->ServiceJoin(prefix,params);
1333                         }
1334                         else if (command == "SQUIT")
1335                         {
1336                                 if (params.size() == 2)
1337                                 {
1338                                         this->Squit(Utils->FindServer(params[0]),params[1]);
1339                                 }
1340                                 return true;
1341                         }
1342                         else if (command == "OPERNOTICE")
1343                         {
1344                                 std::string sourceserv = this->myhost;
1345                                 if (!this->InboundServerName.empty())
1346                                         sourceserv = this->InboundServerName;
1347                                 if (params.size() >= 1)
1348                                         Instance->WriteOpers("*** From " + sourceserv + ": " + params[0]);
1349                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1350                         }
1351                         else if (command == "MODENOTICE")
1352                         {
1353                                 std::string sourceserv = this->myhost;
1354                                 if (!this->InboundServerName.empty())
1355                                         sourceserv = this->InboundServerName;
1356                                 if (params.size() >= 2)
1357                                 {
1358                                         Instance->WriteMode(params[0].c_str(), WM_AND, "*** From %s: %s", sourceserv.c_str(), params[1].c_str());
1359                                 }
1360                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1361                         }
1362                         else if (command == "SNONOTICE")
1363                         {
1364                                 std::string sourceserv = this->myhost;
1365                                 if (!this->InboundServerName.empty())
1366                                         sourceserv = this->InboundServerName;
1367                                 if (params.size() >= 2)
1368                                 {
1369                                         Instance->SNO->WriteToSnoMask(*(params[0].c_str()), "From " + sourceserv + ": "+ params[1]);
1370                                 }
1371                                 return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
1372                         }
1373                         else if (command == "ENDBURST")
1374                         {
1375                                 this->bursting = false;
1376                                 Instance->XLines->apply_lines(Utils->lines_to_apply);
1377                                 Utils->lines_to_apply = 0;
1378                                 std::string sourceserv = this->myhost;
1379                                 if (!this->InboundServerName.empty())
1380                                         sourceserv = this->InboundServerName;
1381                                 this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
1382
1383                                 Event rmode((char*)sourceserv.c_str(), (Module*)Utils->Creator, "new_server");
1384                                 rmode.Send(Instance);
1385
1386                                 return true;
1387                         }
1388                         else
1389                         {
1390                                 // not a special inter-server command.
1391                                 // Emulate the actual user doing the command,
1392                                 // this saves us having a huge ugly parser.
1393                                 userrec* who = this->Instance->FindNick(prefix);
1394                                 std::string sourceserv = this->myhost;
1395                                 if (!this->InboundServerName.empty())
1396                                 {
1397                                         sourceserv = this->InboundServerName;
1398                                 }
1399                                 if ((!who) && (command == "MODE"))
1400                                 {
1401                                         if (Utils->IsServer(prefix))
1402                                         {
1403                                                 const char* modelist[127];
1404                                                 for (size_t i = 0; i < params.size(); i++)
1405                                                         modelist[i] = params[i].c_str();
1406                                                 userrec* fake = new userrec(Instance);
1407                                                 fake->SetFd(FD_MAGIC_NUMBER);
1408                                                 this->Instance->SendMode(modelist, params.size(), fake);
1409
1410                                                 delete fake;
1411                                                 /* Hot potato! pass it on! */
1412                                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1413                                         }
1414                                 }
1415                                 if (who)
1416                                 {
1417                                         if ((command == "NICK") && (params.size() > 0))
1418                                         {
1419                                                 /* On nick messages, check that the nick doesnt
1420                                                  * already exist here. If it does, kill their copy,
1421                                                  * and our copy.
1422                                                  */
1423                                                 userrec* x = this->Instance->FindNick(params[0]);
1424                                                 if ((x) && (x != who))
1425                                                 {
1426                                                         std::deque<std::string> p;
1427                                                         p.push_back(params[0]);
1428                                                         p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
1429                                                         Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
1430                                                         p.clear();
1431                                                         p.push_back(prefix);
1432                                                         p.push_back("Nickname collision");
1433                                                         Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
1434                                                         userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
1435                                                         userrec* y = this->Instance->FindNick(prefix);
1436                                                         if (y)
1437                                                         {
1438                                                                 userrec::QuitUser(this->Instance,y,"Nickname collision");
1439                                                         }
1440                                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1441                                                 }
1442                                         }
1443                                         // its a user
1444                                         target = who->server;
1445                                         const char* strparams[127];
1446                                         for (unsigned int q = 0; q < params.size(); q++)
1447                                         {
1448                                                 strparams[q] = params[q].c_str();
1449                                         }
1450                                         switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
1451                                         {
1452                                                 case CMD_INVALID:
1453                                                         this->SendError("Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
1454                                                         return false;
1455                                                 break;
1456                                                 case CMD_FAILURE:
1457                                                         return true;
1458                                                 break;
1459                                                 default:
1460                                                         /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
1461                                                 break;
1462                                         }
1463                                 }
1464                                 else
1465                                 {
1466                                         // its not a user. Its either a server, or somethings screwed up.
1467                                         if (Utils->IsServer(prefix))
1468                                                 target = this->Instance->Config->ServerName;
1469                                         else
1470                                                 return true;
1471                                 }
1472                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
1473
1474                         }
1475                         return true;
1476                 break;
1477         }
1478         return true;
1479 }
1480
1481 std::string TreeSocket::GetName()
1482 {
1483         std::string sourceserv = this->myhost;
1484         if (!this->InboundServerName.empty())
1485         {
1486                 sourceserv = this->InboundServerName;
1487         }
1488         return sourceserv;
1489 }
1490
1491 void TreeSocket::OnTimeout()
1492 {
1493         if (this->LinkState == CONNECTING)
1494         {
1495                 this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out.");
1496                 Link* MyLink = Utils->FindLink(myhost);
1497                 if (MyLink)
1498                         Utils->DoFailOver(MyLink);
1499         }
1500 }
1501
1502 void TreeSocket::OnClose()
1503 {
1504         // Connection closed.
1505         // If the connection is fully up (state CONNECTED)
1506         // then propogate a netsplit to all peers.
1507         std::string quitserver = this->myhost;
1508         if (!this->InboundServerName.empty())
1509         {
1510                 quitserver = this->InboundServerName;
1511         }
1512         TreeServer* s = Utils->FindServer(quitserver);
1513         if (s)
1514         {
1515                 Squit(s,"Remote host closed the connection");
1516         }
1517
1518         if (!quitserver.empty())
1519         {
1520                 this->Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' failed.",quitserver.c_str());
1521                 time_t server_uptime = Instance->Time() - this->age;
1522                 if (server_uptime)
1523                         Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' was established for %s", quitserver.c_str(), Utils->Creator->TimeToStr(server_uptime).c_str());
1524         }
1525 }
1526
1527 int TreeSocket::OnIncomingConnection(int newsock, char* ip)
1528 {
1529         /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
1530          * or discovering if this port is the server port, we don't allow connections from any
1531          * IPs for which we don't have a link block.
1532          */
1533         bool found = false;
1534
1535         found = (std::find(Utils->ValidIPs.begin(), Utils->ValidIPs.end(), ip) != Utils->ValidIPs.end());
1536         if (!found)
1537         {
1538                 for (vector<std::string>::iterator i = Utils->ValidIPs.begin(); i != Utils->ValidIPs.end(); i++)
1539                         if (irc::sockets::MatchCIDR(ip, (*i).c_str()))
1540                                 found = true;
1541
1542                 if (!found)
1543                 {
1544                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from %s denied (no link blocks with that IP address)", ip);
1545                         close(newsock);
1546                         return false;
1547                 }
1548         }
1549
1550         TreeSocket* s = new TreeSocket(this->Utils, this->Instance, newsock, ip, this->Hook);
1551         s = s; /* Whinge whinge whinge, thats all GCC ever does. */
1552         return true;
1553 }