src/modules/m_spanningtree/utils.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15 #include "commands/cmd_whois.h"
  16 #include "commands/cmd_stats.h"
  17 #include "socket.h"
  18 #include "wildcard.h"
  19 #include "xline.h"
  20 #include "transport.h"
  21 #include "socketengine.h"
  22
  23 #include "m_spanningtree/main.h"
  24 #include "m_spanningtree/utils.h"
  25 #include "m_spanningtree/treeserver.h"
  26 #include "m_spanningtree/link.h"
  27 #include "m_spanningtree/treesocket.h"
  28 #include "m_spanningtree/resolvers.h"
  29
  30 /* $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 */
  31
  32 /** Yay for fast searches!
  33  * This is hundreds of times faster than recursion
  34  * or even scanning a linked list, especially when
  35  * there are more than a few servers to deal with.
  36  * (read as: lots).
  37  */
  38 TreeServer* SpanningTreeUtilities::FindServer(const std::string &ServerName)
  39 {
  40         server_hash::iterator iter = serverlist.find(ServerName.c_str());
  41         if (iter != serverlist.end())
  42         {
  43                 return iter->second;
  44         }
  45         else
  46         {
  47                 return NULL;
  48         }
  49 }
  50
  51 TreeServer* SpanningTreeUtilities::FindRemoteBurstServer(TreeServer* Server)
  52 {
  53         server_hash::iterator iter = RemoteServersBursting.find(Server->GetName().c_str());
  54         if (iter != RemoteServersBursting.end())
  55                 return iter->second;
  56         else
  57                 return NULL;
  58 }
  59
  60 TreeSocket* SpanningTreeUtilities::FindBurstingServer(const std::string &ServerName)
  61 {
  62         std::map<irc::string,TreeSocket*>::iterator iter;
  63         iter = burstingserverlist.find(ServerName.c_str());
  64         if (iter != burstingserverlist.end())
  65         {
  66                 return iter->second;
  67         }
  68         else
  69         {
  70                 return NULL;
  71         }
  72 }
  73
  74 void SpanningTreeUtilities::SetRemoteBursting(TreeServer* Server, bool bursting)
  75 {
  76         server_hash::iterator iter = RemoteServersBursting.find(Server->GetName().c_str());
  77         if (bursting)
  78         {
  79                 if (iter == RemoteServersBursting.end())
  80                         RemoteServersBursting.insert(make_pair(Server->GetName(), Server));
  81                 else return;
  82         }
  83         else
  84         {
  85                 if (iter != RemoteServersBursting.end())
  86                         RemoteServersBursting.erase(iter);
  87                 else return;
  88         }
  89         ServerInstance->Log(DEBUG,"Server %s is %sbursting nicknames", Server->GetName().c_str(), bursting ? "" : "no longer ");
  90 }
  91
  92 void SpanningTreeUtilities::AddBurstingServer(const std::string &ServerName, TreeSocket* s)
  93 {
  94         std::map<irc::string,TreeSocket*>::iterator iter = burstingserverlist.find(ServerName.c_str());
  95         if (iter == burstingserverlist.end())
  96                 burstingserverlist[ServerName.c_str()] = s;
  97 }
  98
  99 void SpanningTreeUtilities::DelBurstingServer(TreeSocket* s)
 100 {
 101          for (std::map<irc::string,TreeSocket*>::iterator iter = burstingserverlist.begin(); iter != burstingserverlist.end(); iter++)
 102          {
 103                  if (iter->second == s)
 104                  {
 105                          burstingserverlist.erase(iter);
 106                          return;
 107                  }
 108          }
 109 }
 110
 111 /** Returns the locally connected server we must route a
 112  * message through to reach server 'ServerName'. This
 113  * only applies to one-to-one and not one-to-many routing.
 114  * See the comments for the constructor of TreeServer
 115  * for more details.
 116  */
 117 TreeServer* SpanningTreeUtilities::BestRouteTo(const std::string &ServerName)
 118 {
 119         if (ServerName.c_str() == TreeRoot->GetName())
 120                 return NULL;
 121         TreeServer* Found = FindServer(ServerName);
 122         if (Found)
 123         {
 124                 return Found->GetRoute();
 125         }
 126         else
 127         {
 128                 return NULL;
 129         }
 130 }
 131
 132 /** Find the first server matching a given glob mask.
 133  * Theres no find-using-glob method of hash_map [awwww :-(]
 134  * so instead, we iterate over the list using an iterator
 135  * and match each one until we get a hit. Yes its slow,
 136  * deal with it.
 137  */
 138 TreeServer* SpanningTreeUtilities::FindServerMask(const std::string &ServerName)
 139 {
 140         for (server_hash::iterator i = serverlist.begin(); i != serverlist.end(); i++)
 141         {
 142                 if (match(i->first.c_str(),ServerName.c_str()))
 143                         return i->second;
 144         }
 145         return NULL;
 146 }
 147
 148 TreeServer* SpanningTreeUtilities::FindServerID(const std::string &id)
 149 {
 150         ServerInstance->Log(DEBUG,"Looking for id: %s", id.c_str());
 151         server_hash::iterator iter = sidlist.find(id);
 152         if (iter != sidlist.end())
 153                 return iter->second;
 154         else
 155                 return NULL;
 156 }
 157
 158 /* A convenient wrapper that returns true if a server exists */
 159 bool SpanningTreeUtilities::IsServer(const std::string &ServerName)
 160 {
 161         return (FindServer(ServerName) != NULL);
 162 }
 163
 164 SpanningTreeUtilities::SpanningTreeUtilities(InspIRCd* Instance, ModuleSpanningTree* C) : ServerInstance(Instance), Creator(C)
 165 {
 166         Bindings.clear();
 167
 168         std::string OurSID;
 169
 170         OurSID += (char)((Instance->Config->sid / 100) + 48);
 171         OurSID += (char)((Instance->Config->sid / 10) % 10 + 48);
 172         OurSID += (char)(Instance->Config->sid % 10 + 48);
 173
 174         lines_to_apply = 0;
 175
 176         ServerInstance->Log(DEBUG, "SpanningTreeUtilities: SID: %s", OurSID.c_str());
 177
 178         this->TreeRoot = new TreeServer(this, ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc, OurSID);
 179
 180         modulelist* ml = ServerInstance->FindInterface("InspSocketHook");
 181
 182         /* Did we find any modules? */
 183         if (ml)
 184         {
 185                 /* Yes, enumerate them all to find out the hook name */
 186                 for (modulelist::iterator m = ml->begin(); m != ml->end(); m++)
 187                 {
 188                         /* Make a request to it for its name, its implementing
 189                          * InspSocketHook so we know its safe to do this
 190                          */
 191                         std::string name = InspSocketNameRequest((Module*)Creator, *m).Send();
 192                         /* Build a map of them */
 193                         hooks[name.c_str()] = *m;
 194                         hooknames.push_back(name);
 195                 }
 196         }
 197
 198         this->ReadConfiguration(true);
 199 }
 200
 201 SpanningTreeUtilities::~SpanningTreeUtilities()
 202 {
 203         for (unsigned int i = 0; i < Bindings.size(); i++)
 204         {
 205                 ServerInstance->SE->DelFd(Bindings[i]);
 206                 Bindings[i]->Close();
 207         }
 208         while (TreeRoot->ChildCount())
 209         {
 210                 TreeServer* child_server = TreeRoot->GetChild(0);
 211                 if (child_server)
 212                 {
 213                         TreeSocket* sock = child_server->GetSocket();
 214                         ServerInstance->SE->DelFd(sock);
 215                         sock->Close();
 216                 }
 217         }
 218         delete TreeRoot;
 219         ServerInstance->InspSocketCull();
 220 }
 221
 222 void SpanningTreeUtilities::AddThisServer(TreeServer* server, TreeServerList &list)
 223 {
 224         if (list.find(server) == list.end())
 225                 list[server] = server;
 226 }
 227
 228 /* returns a list of DIRECT servernames for a specific channel */
 229 void SpanningTreeUtilities::GetListOfServersForChannel(chanrec* c, TreeServerList &list, char status, const CUList &exempt_list)
 230 {
 231         CUList *ulist;
 232         switch (status)
 233         {
 234                 case '@':
 235                         ulist = c->GetOppedUsers();
 236                 break;
 237                 case '%':
 238                         ulist = c->GetHalfoppedUsers();
 239                 break;
 240                 case '+':
 241                         ulist = c->GetVoicedUsers();
 242                 break;
 243                 default:
 244                         ulist = c->GetUsers();
 245                 break;
 246         }
 247         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 248         {
 249                 if ((i->first->GetFd() < 0) && (exempt_list.find(i->first) == exempt_list.end()))
 250                 {
 251                         TreeServer* best = this->BestRouteTo(i->first->server);
 252                         if (best)
 253                                 AddThisServer(best,list);
 254                 }
 255         }
 256         return;
 257 }
 258
 259 bool SpanningTreeUtilities::DoOneToAllButSenderRaw(const std::string &data, const std::string &omit, const std::string &prefix, const irc::string &command, std::deque<std::string> &params)
 260 {
 261         char pfx = 0;
 262         TreeServer* omitroute = this->BestRouteTo(omit);
 263         if ((command == "NOTICE") || (command == "PRIVMSG"))
 264         {
 265                 if (params.size() >= 2)
 266                 {
 267                         /* Prefixes */
 268                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
 269                         {
 270                                 pfx = params[0][0];
 271                                 params[0] = params[0].substr(1, params[0].length()-1);
 272                         }
 273                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
 274                         {
 275                                 // special routing for private messages/notices
 276                                 userrec* d = ServerInstance->FindNick(params[0]);
 277                                 if (d)
 278                                 {
 279                                         std::deque<std::string> par;
 280                                         par.push_back(params[0]);
 281                                         par.push_back(":"+params[1]);
 282                                         this->DoOneToOne(prefix,command.c_str(),par,d->server);
 283                                         return true;
 284                                 }
 285                         }
 286                         else if (*(params[0].c_str()) == '$')
 287                         {
 288                                 std::deque<std::string> par;
 289                                 par.push_back(params[0]);
 290                                 par.push_back(":"+params[1]);
 291                                 this->DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
 292                                 return true;
 293                         }
 294                         else
 295                         {
 296                                 chanrec* c = ServerInstance->FindChan(params[0]);
 297                                 userrec* u = ServerInstance->FindNick(prefix);
 298                                 if (c && u)
 299                                 {
 300                                         CUList elist;
 301                                         TreeServerList list;
 302                                         FOREACH_MOD(I_OnBuildExemptList, OnBuildExemptList((command == "PRIVMSG" ? MSG_PRIVMSG : MSG_NOTICE), c, u, pfx, elist));
 303                                         GetListOfServersForChannel(c,list,pfx,elist);
 304
 305                                         for (TreeServerList::iterator i = list.begin(); i != list.end(); i++)
 306                                         {
 307                                                 TreeSocket* Sock = i->second->GetSocket();
 308                                                 if ((Sock) && (i->second->GetName() != omit) && (omitroute != i->second))
 309                                                 {
 310                                                         Sock->WriteLine(data);
 311                                                 }
 312                                         }
 313                                         return true;
 314                                 }
 315                         }
 316                 }
 317         }
 318         unsigned int items =this->TreeRoot->ChildCount();
 319         for (unsigned int x = 0; x < items; x++)
 320         {
 321                 TreeServer* Route = this->TreeRoot->GetChild(x);
 322                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
 323                 {
 324                         TreeSocket* Sock = Route->GetSocket();
 325                         if (Sock)
 326                                 Sock->WriteLine(data);
 327                 }
 328         }
 329         return true;
 330 }
 331
 332 bool SpanningTreeUtilities::DoOneToAllButSender(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string omit)
 333 {
 334         TreeServer* omitroute = this->BestRouteTo(omit);
 335         std::string FullLine = ":" + prefix + " " + command;
 336         unsigned int words = params.size();
 337         for (unsigned int x = 0; x < words; x++)
 338         {
 339                 FullLine = FullLine + " " + params[x];
 340         }
 341         unsigned int items = this->TreeRoot->ChildCount();
 342         for (unsigned int x = 0; x < items; x++)
 343         {
 344                 TreeServer* Route = this->TreeRoot->GetChild(x);
 345                 // Send the line IF:
 346                 // The route has a socket (its a direct connection)
 347                 // The route isnt the one to be omitted
 348                 // The route isnt the path to the one to be omitted
 349                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
 350                 {
 351                         TreeSocket* Sock = Route->GetSocket();
 352                         if (Sock)
 353                                 Sock->WriteLine(FullLine);
 354                 }
 355         }
 356         return true;
 357 }
 358
 359 bool SpanningTreeUtilities::DoOneToMany(const std::string &prefix, const std::string &command, std::deque<std::string> &params)
 360 {
 361         std::string FullLine = ":" + prefix + " " + command;
 362         unsigned int words = params.size();
 363         for (unsigned int x = 0; x < words; x++)
 364         {
 365                 FullLine = FullLine + " " + params[x];
 366         }
 367         unsigned int items = this->TreeRoot->ChildCount();
 368         for (unsigned int x = 0; x < items; x++)
 369         {
 370                 TreeServer* Route = this->TreeRoot->GetChild(x);
 371                 if (Route && Route->GetSocket())
 372                 {
 373                         TreeSocket* Sock = Route->GetSocket();
 374                         if (Sock)
 375                                 Sock->WriteLine(FullLine);
 376                 }
 377         }
 378         return true;
 379 }
 380
 381 bool SpanningTreeUtilities::DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params)
 382 {
 383         std::string spfx = prefix;
 384         std::string scmd = command;
 385         return this->DoOneToMany(spfx, scmd, params);
 386 }
 387
 388 bool SpanningTreeUtilities::DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit)
 389 {
 390         std::string spfx = prefix;
 391         std::string scmd = command;
 392         return this->DoOneToAllButSender(spfx, scmd, params, omit);
 393 }
 394
 395 bool SpanningTreeUtilities::DoOneToOne(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string target)
 396 {
 397         TreeServer* Route = this->BestRouteTo(target);
 398         if (Route)
 399         {
 400                 std::string FullLine = ":" + prefix + " " + command;
 401                 unsigned int words = params.size();
 402                 for (unsigned int x = 0; x < words; x++)
 403                 {
 404                         FullLine = FullLine + " " + params[x];
 405                 }
 406                 if (Route && Route->GetSocket())
 407                 {
 408                         TreeSocket* Sock = Route->GetSocket();
 409                         if (Sock)
 410                                 Sock->WriteLine(FullLine);
 411                 }
 412                 return true;
 413         }
 414         else
 415         {
 416                 return false;
 417         }
 418 }
 419
 420 void SpanningTreeUtilities::RefreshIPCache()
 421 {
 422         ValidIPs.clear();
 423         for (std::vector<Link>::iterator L = LinkBlocks.begin(); L != LinkBlocks.end(); L++)
 424         {
 425                 if ((!L->IPAddr.empty()) && (!L->RecvPass.empty()) && (!L->SendPass.empty()) && (!L->Name.empty()) && (L->Port))
 426                 {
 427                         ValidIPs.push_back(L->IPAddr);
 428
 429                         if (L->AllowMask.length())
 430                                 ValidIPs.push_back(L->AllowMask);
 431
 432                         /* Needs resolving */
 433                         bool ipvalid = true;
 434                         QueryType start_type = DNS_QUERY_A;
 435 #ifdef IPV6
 436                         start_type = DNS_QUERY_AAAA;
 437                         if (strchr(L->IPAddr.c_str(),':'))
 438                         {
 439                                 in6_addr n;
 440                                 if (inet_pton(AF_INET6, L->IPAddr.c_str(), &n) < 1)
 441                                         ipvalid = false;
 442                         }
 443                         else
 444 #endif
 445                         {
 446                                 in_addr n;
 447                                 if (inet_aton(L->IPAddr.c_str(),&n) < 1)
 448                                         ipvalid = false;
 449                         }
 450                         if (!ipvalid)
 451                         {
 452                                 try
 453                                 {
 454                                         bool cached;
 455                                         SecurityIPResolver* sr = new SecurityIPResolver((Module*)this->Creator, this, ServerInstance, L->IPAddr, *L, cached, start_type);
 456                                         ServerInstance->AddResolver(sr, cached);
 457                                 }
 458                                 catch (...)
 459                                 {
 460                                 }
 461                         }
 462                 }
 463         }
 464 }
 465
 466 void SpanningTreeUtilities::ReadConfiguration(bool rebind)
 467 {
 468         ConfigReader* Conf = new ConfigReader(ServerInstance);
 469         if (rebind)
 470         {
 471                 for (int j = 0; j < Conf->Enumerate("bind"); j++)
 472                 {
 473                         std::string Type = Conf->ReadValue("bind","type",j);
 474                         std::string IP = Conf->ReadValue("bind","address",j);
 475                         std::string Port = Conf->ReadValue("bind","port",j);
 476                         std::string transport = Conf->ReadValue("bind","transport",j);
 477                         if (Type == "servers")
 478                         {
 479                                 irc::portparser portrange(Port, false);
 480                                 int portno = -1;
 481                                 while ((portno = portrange.GetToken()))
 482                                 {
 483                                         if (IP == "*")
 484                                                 IP.clear();
 485
 486                                         if ((!transport.empty()) && (hooks.find(transport.c_str()) ==  hooks.end()))
 487                                         {
 488                                                 ServerInstance->Log(DEFAULT,"m_spanningtree: WARNING: Can't find transport type '%s' for port %s:%s - maybe you forgot to load it BEFORE m_spanningtree in your config file? - Skipping this port binding", transport.c_str(), IP.c_str(), Port.c_str());
 489                                                 break;
 490                                         }
 491
 492                                         TreeSocket* listener = new TreeSocket(this, ServerInstance, IP.c_str(), portno, true, 10, transport.empty() ? NULL : hooks[transport.c_str()]);
 493                                         if (listener->GetState() == I_LISTENING)
 494                                         {
 495                                                 ServerInstance->Log(DEFAULT,"m_spanningtree: Binding server port %s:%d successful!", IP.c_str(), portno);
 496                                                 Bindings.push_back(listener);
 497                                         }
 498                                         else
 499                                         {
 500                                                 ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port: %s:%d: %s",IP.c_str(), portno, strerror(errno));
 501                                                 listener->Close();
 502                                         }
 503                                 }
 504                         }
 505                 }
 506         }
 507         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
 508         HideULines = Conf->ReadFlag("options","hideulines",0);
 509         AnnounceTSChange = Conf->ReadFlag("options","announcets",0);
 510         EnableTimeSync = Conf->ReadFlag("timesync","enable",0);
 511         MasterTime = Conf->ReadFlag("timesync", "master", 0);
 512         ChallengeResponse = !Conf->ReadFlag("options", "disablehmac", 0);
 513         quiet_bursts = Conf->ReadFlag("options", "quietbursts", 0);
 514         PingWarnTime = Conf->ReadInteger("options", "pingwarning", 0, true);
 515         PingFreq = Conf->ReadInteger("options", "serverpingfreq", 0, true);
 516
 517         if (PingFreq == 0)
 518                 PingFreq = 60;
 519
 520         if (PingWarnTime < 0 || PingWarnTime > PingFreq - 1)
 521                 PingWarnTime = 0;
 522
 523         LinkBlocks.clear();
 524         ValidIPs.clear();
 525         for (int j = 0; j < Conf->Enumerate("link"); j++)
 526         {
 527                 Link L;
 528                 std::string Allow = Conf->ReadValue("link", "allowmask", j);
 529                 L.Name = (Conf->ReadValue("link", "name", j)).c_str();
 530                 L.AllowMask = Allow;
 531                 L.IPAddr = Conf->ReadValue("link", "ipaddr", j);
 532                 L.FailOver = Conf->ReadValue("link", "failover", j).c_str();
 533                 L.Port = Conf->ReadInteger("link", "port", j, true);
 534                 L.SendPass = Conf->ReadValue("link", "sendpass", j);
 535                 L.RecvPass = Conf->ReadValue("link", "recvpass", j);
 536                 L.AutoConnect = Conf->ReadInteger("link", "autoconnect", j, true);
 537                 L.HiddenFromStats = Conf->ReadFlag("link", "statshidden", j);
 538                 L.Timeout = Conf->ReadInteger("link", "timeout", j, true);
 539                 L.Hook = Conf->ReadValue("link", "transport", j);
 540                 L.Bind = Conf->ReadValue("link", "bind", j);
 541                 L.Hidden = Conf->ReadFlag("link", "hidden", j);
 542
 543                 if ((!L.Hook.empty()) && (hooks.find(L.Hook.c_str()) ==  hooks.end()))
 544                 {
 545                         ServerInstance->Log(DEFAULT,"m_spanningtree: WARNING: Can't find transport type '%s' for link '%s' - maybe you forgot to load it BEFORE m_spanningtree in your config file? Skipping <link> tag completely.",
 546                         L.Hook.c_str(), L.Name.c_str());
 547                         continue;
 548
 549                 }
 550
 551                 L.NextConnectTime = time(NULL) + L.AutoConnect;
 552                 /* Bugfix by brain, do not allow people to enter bad configurations */
 553                 if (L.Name != ServerInstance->Config->ServerName)
 554                 {
 555                         if ((!L.IPAddr.empty()) && (!L.RecvPass.empty()) && (!L.SendPass.empty()) && (!L.Name.empty()) && (L.Port))
 556                         {
 557                                 ValidIPs.push_back(L.IPAddr);
 558
 559                                 if (Allow.length())
 560                                         ValidIPs.push_back(Allow);
 561
 562                                 /* Needs resolving */
 563                                 bool ipvalid = true;
 564                                 QueryType start_type = DNS_QUERY_A;
 565 #ifdef IPV6
 566                                 start_type = DNS_QUERY_AAAA;
 567                                 if (strchr(L.IPAddr.c_str(),':'))
 568                                 {
 569                                         in6_addr n;
 570                                         if (inet_pton(AF_INET6, L.IPAddr.c_str(), &n) < 1)
 571                                                 ipvalid = false;
 572                                 }
 573                                 else
 574                                 {
 575                                         in_addr n;
 576                                         if (inet_aton(L.IPAddr.c_str(),&n) < 1)
 577                                                 ipvalid = false;
 578                                 }
 579 #else
 580                                 in_addr n;
 581                                 if (inet_aton(L.IPAddr.c_str(),&n) < 1)
 582                                         ipvalid = false;
 583 #endif
 584
 585                                 if (!ipvalid)
 586                                 {
 587                                         try
 588                                         {
 589                                                 bool cached;
 590                                                 SecurityIPResolver* sr = new SecurityIPResolver((Module*)this->Creator, this, ServerInstance, L.IPAddr, L, cached, start_type);
 591                                                 ServerInstance->AddResolver(sr, cached);
 592                                         }
 593                                         catch (...)
 594                                         {
 595                                         }
 596                                 }
 597
 598                                 LinkBlocks.push_back(L);
 599                         }
 600                         else
 601                         {
 602                                 if (L.IPAddr.empty())
 603                                 {
 604                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
 605                                 }
 606                                 else if (L.RecvPass.empty())
 607                                 {
 608                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
 609                                 }
 610                                 else if (L.SendPass.empty())
 611                                 {
 612                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
 613                                 }
 614                                 else if (L.Name.empty())
 615                                 {
 616                                         ServerInstance->Log(DEFAULT,"Invalid configuration, link tag without a name!");
 617                                 }
 618                                 else if (!L.Port)
 619                                 {
 620                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
 621                                 }
 622                         }
 623                 }
 624                 else
 625                 {
 626                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', link tag has the same server name as the local server!",L.Name.c_str());
 627                 }
 628         }
 629         DELETE(Conf);
 630 }
 631
 632 void SpanningTreeUtilities::DoFailOver(Link* x)
 633 {
 634         if (x->FailOver.length())
 635         {
 636                 if (x->FailOver == x->Name)
 637                 {
 638                         Creator->RemoteMessage(NULL,"FAILOVER: Some muppet configured the failover for server \002%s\002 to point at itself. Not following it!", x->Name.c_str());
 639                         return;
 640                 }
 641                 Link* TryThisOne = this->FindLink(x->FailOver.c_str());
 642                 if (TryThisOne)
 643                 {
 644                         Creator->RemoteMessage(NULL,"FAILOVER: Trying failover link for \002%s\002: \002%s\002...", x->Name.c_str(), TryThisOne->Name.c_str());
 645                         Creator->ConnectServer(TryThisOne);
 646                 }
 647                 else
 648                 {
 649                         Creator->RemoteMessage(NULL,"FAILOVER: Invalid failover server specified for server \002%s\002, will not follow!", x->Name.c_str());
 650                 }
 651         }
 652 }
 653
 654 Link* SpanningTreeUtilities::FindLink(const std::string& name)
 655 {
 656         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 657         {
 658                 if (ServerInstance->MatchText(x->Name.c_str(), name.c_str()))
 659                 {
 660                         return &(*x);
 661                 }
 662         }
 663         return NULL;
 664 }
 665