src/modules/m_spanningtree/utils.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2008 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         if (this->ServerInstance->IsSID(ServerName))
  41                 return this->FindServerID(ServerName);
  42
  43         server_hash::iterator iter = serverlist.find(ServerName.c_str());
  44         if (iter != serverlist.end())
  45         {
  46                 return iter->second;
  47         }
  48         else
  49         {
  50                 return NULL;
  51         }
  52 }
  53
  54 /** Returns the locally connected server we must route a
  55  * message through to reach server 'ServerName'. This
  56  * only applies to one-to-one and not one-to-many routing.
  57  * See the comments for the constructor of TreeServer
  58  * for more details.
  59  */
  60 TreeServer* SpanningTreeUtilities::BestRouteTo(const std::string &ServerName)
  61 {
  62         if (ServerName.c_str() == TreeRoot->GetName() || ServerName == ServerInstance->Config->GetSID())
  63                 return NULL;
  64         TreeServer* Found = FindServer(ServerName);
  65         if (Found)
  66         {
  67                 return Found->GetRoute();
  68         }
  69         else
  70         {
  71                 return NULL;
  72         }
  73 }
  74
  75 /** Find the first server matching a given glob mask.
  76  * Theres no find-using-glob method of hash_map [awwww :-(]
  77  * so instead, we iterate over the list using an iterator
  78  * and match each one until we get a hit. Yes its slow,
  79  * deal with it.
  80  */
  81 TreeServer* SpanningTreeUtilities::FindServerMask(const std::string &ServerName)
  82 {
  83         for (server_hash::iterator i = serverlist.begin(); i != serverlist.end(); i++)
  84         {
  85                 if (match(i->first.c_str(),ServerName.c_str()))
  86                         return i->second;
  87         }
  88         return NULL;
  89 }
  90
  91 TreeServer* SpanningTreeUtilities::FindServerID(const std::string &id)
  92 {
  93         server_hash::iterator iter = sidlist.find(id);
  94         if (iter != sidlist.end())
  95                 return iter->second;
  96         else
  97                 return NULL;
  98 }
  99
 100 /* A convenient wrapper that returns true if a server exists */
 101 bool SpanningTreeUtilities::IsServer(const std::string &ServerName)
 102 {
 103         return (FindServer(ServerName) != NULL);
 104 }
 105
 106 SpanningTreeUtilities::SpanningTreeUtilities(InspIRCd* Instance, ModuleSpanningTree* C) : ServerInstance(Instance), Creator(C)
 107 {
 108         Bindings.clear();
 109
 110         this->TreeRoot = new TreeServer(this, ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc, ServerInstance->Config->GetSID());
 111
 112         modulelist* ml = ServerInstance->Modules->FindInterface("BufferedSocketHook");
 113
 114         /* Did we find any modules? */
 115         if (ml)
 116         {
 117                 /* Yes, enumerate them all to find out the hook name */
 118                 for (modulelist::iterator m = ml->begin(); m != ml->end(); m++)
 119                 {
 120                         /* Make a request to it for its name, its implementing
 121                          * BufferedSocketHook so we know its safe to do this
 122                          */
 123                         std::string name = BufferedSocketNameRequest((Module*)Creator, *m).Send();
 124                         /* Build a map of them */
 125                         hooks[name.c_str()] = *m;
 126                         hooknames.push_back(name);
 127                 }
 128         }
 129
 130         this->ReadConfiguration(true);
 131 }
 132
 133 SpanningTreeUtilities::~SpanningTreeUtilities()
 134 {
 135         for (unsigned int i = 0; i < Bindings.size(); i++)
 136         {
 137                 ServerInstance->SE->DelFd(Bindings[i]);
 138                 Bindings[i]->Close();
 139         }
 140         while (TreeRoot->ChildCount())
 141         {
 142                 TreeServer* child_server = TreeRoot->GetChild(0);
 143                 if (child_server)
 144                 {
 145                         TreeSocket* sock = child_server->GetSocket();
 146                         ServerInstance->SE->DelFd(sock);
 147                         sock->Close();
 148                 }
 149         }
 150         delete TreeRoot;
 151         ServerInstance->BufferedSocketCull();
 152 }
 153
 154 void SpanningTreeUtilities::AddThisServer(TreeServer* server, TreeServerList &list)
 155 {
 156         if (list.find(server) == list.end())
 157                 list[server] = server;
 158 }
 159
 160 /* returns a list of DIRECT servernames for a specific channel */
 161 void SpanningTreeUtilities::GetListOfServersForChannel(Channel* c, TreeServerList &list, char status, const CUList &exempt_list)
 162 {
 163         CUList *ulist;
 164         switch (status)
 165         {
 166                 case '@':
 167                         ulist = c->GetOppedUsers();
 168                 break;
 169                 case '%':
 170                         ulist = c->GetHalfoppedUsers();
 171                 break;
 172                 case '+':
 173                         ulist = c->GetVoicedUsers();
 174                 break;
 175                 default:
 176                         ulist = c->GetUsers();
 177                 break;
 178         }
 179         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 180         {
 181                 if ((i->first->GetFd() < 0) && (exempt_list.find(i->first) == exempt_list.end()))
 182                 {
 183                         TreeServer* best = this->BestRouteTo(i->first->server);
 184                         if (best)
 185                                 AddThisServer(best,list);
 186                 }
 187         }
 188         return;
 189 }
 190
 191 bool SpanningTreeUtilities::DoOneToAllButSenderRaw(const std::string &data, const std::string &omit, const std::string &prefix, const irc::string &command, std::deque<std::string> &params)
 192 {
 193         char pfx = 0;
 194         TreeServer* omitroute = this->BestRouteTo(omit);
 195         if ((command == "NOTICE") || (command == "PRIVMSG"))
 196         {
 197                 if (params.size() >= 2)
 198                 {
 199                         /* Prefixes */
 200                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
 201                         {
 202                                 pfx = params[0][0];
 203                                 params[0] = params[0].substr(1, params[0].length()-1);
 204                         }
 205                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
 206                         {
 207                                 // special routing for private messages/notices
 208                                 User* d = ServerInstance->FindNick(params[0]);
 209                                 if (d)
 210                                 {
 211                                         std::deque<std::string> par;
 212                                         par.push_back(params[0]);
 213                                         par.push_back(":"+params[1]);
 214                                         this->DoOneToOne(prefix,command.c_str(),par,d->server);
 215                                         return true;
 216                                 }
 217                         }
 218                         else if (*(params[0].c_str()) == '$')
 219                         {
 220                                 std::deque<std::string> par;
 221                                 par.push_back(params[0]);
 222                                 par.push_back(":"+params[1]);
 223                                 this->DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
 224                                 return true;
 225                         }
 226                         else
 227                         {
 228                                 Channel* c = ServerInstance->FindChan(params[0]);
 229                                 User* u = ServerInstance->FindNick(prefix);
 230                                 if (c && u)
 231                                 {
 232                                         CUList elist;
 233                                         TreeServerList list;
 234                                         FOREACH_MOD(I_OnBuildExemptList, OnBuildExemptList((command == "PRIVMSG" ? MSG_PRIVMSG : MSG_NOTICE), c, u, pfx, elist, params[1]));
 235                                         GetListOfServersForChannel(c,list,pfx,elist);
 236
 237                                         for (TreeServerList::iterator i = list.begin(); i != list.end(); i++)
 238                                         {
 239                                                 TreeSocket* Sock = i->second->GetSocket();
 240                                                 if ((Sock) && (i->second->GetName() != omit) && (omitroute != i->second))
 241                                                 {
 242                                                         Sock->WriteLine(data);
 243                                                 }
 244                                         }
 245                                         return true;
 246                                 }
 247                         }
 248                 }
 249         }
 250         unsigned int items =this->TreeRoot->ChildCount();
 251         for (unsigned int x = 0; x < items; x++)
 252         {
 253                 TreeServer* Route = this->TreeRoot->GetChild(x);
 254                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
 255                 {
 256                         TreeSocket* Sock = Route->GetSocket();
 257                         if (Sock)
 258                                 Sock->WriteLine(data);
 259                 }
 260         }
 261         return true;
 262 }
 263
 264 bool SpanningTreeUtilities::DoOneToAllButSender(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string omit)
 265 {
 266         TreeServer* omitroute = this->BestRouteTo(omit);
 267         std::string FullLine = ":" + prefix + " " + command;
 268         unsigned int words = params.size();
 269         for (unsigned int x = 0; x < words; x++)
 270         {
 271                 FullLine = FullLine + " " + params[x];
 272         }
 273         unsigned int items = this->TreeRoot->ChildCount();
 274         for (unsigned int x = 0; x < items; x++)
 275         {
 276                 TreeServer* Route = this->TreeRoot->GetChild(x);
 277                 // Send the line IF:
 278                 // The route has a socket (its a direct connection)
 279                 // The route isnt the one to be omitted
 280                 // The route isnt the path to the one to be omitted
 281                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
 282                 {
 283                         TreeSocket* Sock = Route->GetSocket();
 284                         if (Sock)
 285                                 Sock->WriteLine(FullLine);
 286                 }
 287         }
 288         return true;
 289 }
 290
 291 bool SpanningTreeUtilities::DoOneToMany(const std::string &prefix, const std::string &command, std::deque<std::string> &params)
 292 {
 293         std::string FullLine = ":" + prefix + " " + command;
 294         unsigned int words = params.size();
 295         for (unsigned int x = 0; x < words; x++)
 296         {
 297                 FullLine = FullLine + " " + params[x];
 298         }
 299         unsigned int items = this->TreeRoot->ChildCount();
 300         for (unsigned int x = 0; x < items; x++)
 301         {
 302                 TreeServer* Route = this->TreeRoot->GetChild(x);
 303                 if (Route && Route->GetSocket())
 304                 {
 305                         TreeSocket* Sock = Route->GetSocket();
 306                         if (Sock)
 307                                 Sock->WriteLine(FullLine);
 308                 }
 309         }
 310         return true;
 311 }
 312
 313 bool SpanningTreeUtilities::DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params)
 314 {
 315         std::string spfx = prefix;
 316         std::string scmd = command;
 317         return this->DoOneToMany(spfx, scmd, params);
 318 }
 319
 320 bool SpanningTreeUtilities::DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit)
 321 {
 322         std::string spfx = prefix;
 323         std::string scmd = command;
 324         return this->DoOneToAllButSender(spfx, scmd, params, omit);
 325 }
 326
 327 bool SpanningTreeUtilities::DoOneToOne(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string target)
 328 {
 329         TreeServer* Route = this->BestRouteTo(target);
 330         if (Route)
 331         {
 332                 std::string FullLine = ":" + prefix + " " + command;
 333                 unsigned int words = params.size();
 334                 for (unsigned int x = 0; x < words; x++)
 335                 {
 336                         FullLine = FullLine + " " + params[x];
 337                 }
 338                 if (Route && Route->GetSocket())
 339                 {
 340                         TreeSocket* Sock = Route->GetSocket();
 341                         if (Sock)
 342                                 Sock->WriteLine(FullLine);
 343                 }
 344                 return true;
 345         }
 346         else
 347         {
 348                 return false;
 349         }
 350 }
 351
 352 void SpanningTreeUtilities::RefreshIPCache()
 353 {
 354         ValidIPs.clear();
 355         for (std::vector<Link>::iterator L = LinkBlocks.begin(); L != LinkBlocks.end(); L++)
 356         {
 357                 if ((!L->IPAddr.empty()) && (!L->RecvPass.empty()) && (!L->SendPass.empty()) && (!L->Name.empty()) && (L->Port))
 358                 {
 359                         ValidIPs.push_back(L->IPAddr);
 360
 361                         if (L->AllowMask.length())
 362                                 ValidIPs.push_back(L->AllowMask);
 363
 364                         /* Needs resolving */
 365                         bool ipvalid = true;
 366                         QueryType start_type = DNS_QUERY_A;
 367 #ifdef IPV6
 368                         start_type = DNS_QUERY_AAAA;
 369                         if (strchr(L->IPAddr.c_str(),':'))
 370                         {
 371                                 in6_addr n;
 372                                 if (inet_pton(AF_INET6, L->IPAddr.c_str(), &n) < 1)
 373                                         ipvalid = false;
 374                         }
 375                         else
 376 #endif
 377                         {
 378                                 in_addr n;
 379                                 if (inet_aton(L->IPAddr.c_str(),&n) < 1)
 380                                         ipvalid = false;
 381                         }
 382                         if (!ipvalid)
 383                         {
 384                                 try
 385                                 {
 386                                         bool cached;
 387                                         SecurityIPResolver* sr = new SecurityIPResolver((Module*)this->Creator, this, ServerInstance, L->IPAddr, *L, cached, start_type);
 388                                         ServerInstance->AddResolver(sr, cached);
 389                                 }
 390                                 catch (...)
 391                                 {
 392                                 }
 393                         }
 394                 }
 395         }
 396 }
 397
 398 void SpanningTreeUtilities::ReadConfiguration(bool rebind)
 399 {
 400         ConfigReader* Conf = new ConfigReader(ServerInstance);
 401         if (rebind)
 402         {
 403                 for (unsigned int i = 0; i < Bindings.size(); i++)
 404                 {
 405                         ServerInstance->SE->DelFd(Bindings[i]);
 406                         Bindings[i]->Close();
 407                 }
 408                 ServerInstance->BufferedSocketCull();
 409                 Bindings.clear();
 410
 411                 for (int j = 0; j < Conf->Enumerate("bind"); j++)
 412                 {
 413                         std::string Type = Conf->ReadValue("bind","type",j);
 414                         std::string IP = Conf->ReadValue("bind","address",j);
 415                         std::string Port = Conf->ReadValue("bind","port",j);
 416                         std::string transport = Conf->ReadValue("bind","transport",j);
 417                         if (Type == "servers")
 418                         {
 419                                 irc::portparser portrange(Port, false);
 420                                 int portno = -1;
 421                                 while ((portno = portrange.GetToken()))
 422                                 {
 423                                         if (IP == "*")
 424                                                 IP.clear();
 425
 426                                         if ((!transport.empty()) && (hooks.find(transport.c_str()) ==  hooks.end()))
 427                                         {
 428                                                 throw CoreException("Can't find transport type '"+transport+"' for port "+IP+":"+Port+" - maybe you forgot to load it BEFORE m_spanningtree in your config file?");
 429                                                 break;
 430                                         }
 431
 432                                         TreeSocket* listener = new TreeSocket(this, ServerInstance, IP.c_str(), portno, true, 10, transport.empty() ? NULL : hooks[transport.c_str()]);
 433                                         if (listener->GetState() == I_LISTENING)
 434                                         {
 435                                                 ServerInstance->Log(DEFAULT,"m_spanningtree: Binding server port %s:%d successful!", IP.c_str(), portno);
 436                                                 Bindings.push_back(listener);
 437                                         }
 438                                         else
 439                                         {
 440                                                 ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port: %s:%d: %s",IP.c_str(), portno, strerror(errno));
 441                                                 listener->Close();
 442                                         }
 443                                 }
 444                         }
 445                 }
 446         }
 447         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
 448         HideULines = Conf->ReadFlag("options","hideulines",0);
 449         AnnounceTSChange = Conf->ReadFlag("options","announcets",0);
 450         EnableTimeSync = Conf->ReadFlag("timesync","enable",0);
 451         MasterTime = Conf->ReadFlag("timesync", "master", 0);
 452         ChallengeResponse = !Conf->ReadFlag("options", "disablehmac", 0);
 453         quiet_bursts = Conf->ReadFlag("options", "quietbursts", 0);
 454         PingWarnTime = Conf->ReadInteger("options", "pingwarning", 0, true);
 455         PingFreq = Conf->ReadInteger("options", "serverpingfreq", 0, true);
 456
 457         if (PingFreq == 0)
 458                 PingFreq = 60;
 459
 460         if (PingWarnTime < 0 || PingWarnTime > PingFreq - 1)
 461                 PingWarnTime = 0;
 462
 463         LinkBlocks.clear();
 464         ValidIPs.clear();
 465         for (int j = 0; j < Conf->Enumerate("link"); j++)
 466         {
 467                 Link L;
 468                 std::string Allow = Conf->ReadValue("link", "allowmask", j);
 469                 L.Name = (Conf->ReadValue("link", "name", j)).c_str();
 470                 L.AllowMask = Allow;
 471                 L.IPAddr = Conf->ReadValue("link", "ipaddr", j);
 472                 L.FailOver = Conf->ReadValue("link", "failover", j).c_str();
 473                 L.Port = Conf->ReadInteger("link", "port", j, true);
 474                 L.SendPass = Conf->ReadValue("link", "sendpass", j);
 475                 L.RecvPass = Conf->ReadValue("link", "recvpass", j);
 476                 L.AutoConnect = Conf->ReadInteger("link", "autoconnect", j, true);
 477                 L.HiddenFromStats = Conf->ReadFlag("link", "statshidden", j);
 478                 L.Timeout = Conf->ReadInteger("link", "timeout", j, true);
 479                 L.Hook = Conf->ReadValue("link", "transport", j);
 480                 L.Bind = Conf->ReadValue("link", "bind", j);
 481                 L.Hidden = Conf->ReadFlag("link", "hidden", j);
 482
 483                 if ((!L.Hook.empty()) && (hooks.find(L.Hook.c_str()) ==  hooks.end()))
 484                 {
 485                         throw CoreException("Can't find transport type '"+L.Hook+"' for link '"+assign(L.Name)+"' - maybe you forgot to load it BEFORE m_spanningtree in your config file? Skipping <link> tag completely.");
 486                         continue;
 487
 488                 }
 489
 490                 L.NextConnectTime = time(NULL) + L.AutoConnect;
 491                 /* Bugfix by brain, do not allow people to enter bad configurations */
 492                 if (L.Name != ServerInstance->Config->ServerName)
 493                 {
 494                         if ((!L.IPAddr.empty()) && (!L.RecvPass.empty()) && (!L.SendPass.empty()) && (!L.Name.empty()) && (L.Port))
 495                         {
 496                                 if (L.Name.find('.') == std::string::npos)
 497                                         throw CoreException("The link name '"+assign(L.Name)+"' is invalid and must contain at least one '.' character");
 498
 499                                 if (L.Name.length() > 64)
 500                                         throw CoreException("The link name '"+assign(L.Name)+"' is longer than 64 characters!");
 501
 502                                 ValidIPs.push_back(L.IPAddr);
 503
 504                                 if (Allow.length())
 505                                         ValidIPs.push_back(Allow);
 506
 507                                 /* Needs resolving */
 508                                 bool ipvalid = true;
 509                                 QueryType start_type = DNS_QUERY_A;
 510 #ifdef IPV6
 511                                 start_type = DNS_QUERY_AAAA;
 512                                 if (strchr(L.IPAddr.c_str(),':'))
 513                                 {
 514                                         in6_addr n;
 515                                         if (inet_pton(AF_INET6, L.IPAddr.c_str(), &n) < 1)
 516                                                 ipvalid = false;
 517                                 }
 518                                 else
 519                                 {
 520                                         in_addr n;
 521                                         if (inet_aton(L.IPAddr.c_str(),&n) < 1)
 522                                                 ipvalid = false;
 523                                 }
 524 #else
 525                                 in_addr n;
 526                                 if (inet_aton(L.IPAddr.c_str(),&n) < 1)
 527                                         ipvalid = false;
 528 #endif
 529
 530                                 if (!ipvalid)
 531                                 {
 532                                         try
 533                                         {
 534                                                 bool cached;
 535                                                 SecurityIPResolver* sr = new SecurityIPResolver((Module*)this->Creator, this, ServerInstance, L.IPAddr, L, cached, start_type);
 536                                                 ServerInstance->AddResolver(sr, cached);
 537                                         }
 538                                         catch (...)
 539                                         {
 540                                         }
 541                                 }
 542
 543                                 LinkBlocks.push_back(L);
 544                         }
 545                         else
 546                         {
 547                                 if (L.IPAddr.empty())
 548                                 {
 549                                         throw CoreException("Invalid configuration for server '"+assign(L.Name)+"', IP address not defined!");
 550                                 }
 551                                 else if (L.RecvPass.empty())
 552                                 {
 553                                         throw CoreException("Invalid configuration for server '"+assign(L.Name)+"', recvpass not defined!");
 554                                 }
 555                                 else if (L.SendPass.empty())
 556                                 {
 557                                         throw CoreException("Invalid configuration for server '"+assign(L.Name)+"', sendpass not defined!");
 558                                 }
 559                                 else if (L.Name.empty())
 560                                 {
 561                                         throw CoreException("Invalid configuration, link tag without a name! IP address: "+L.IPAddr);
 562                                 }
 563                                 else if (!L.Port)
 564                                 {
 565                                         throw CoreException("Invalid configuration for server '"+assign(L.Name)+"', no port specified!");
 566                                 }
 567                         }
 568                 }
 569                 else
 570                 {
 571                         throw CoreException("Invalid configuration for server '"+assign(L.Name)+"', link tag has the same server name as the local server!");
 572                 }
 573         }
 574         delete Conf;
 575 }
 576
 577 void SpanningTreeUtilities::DoFailOver(Link* x)
 578 {
 579         if (x->FailOver.length())
 580         {
 581                 if (x->FailOver == x->Name)
 582                 {
 583                         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());
 584                         return;
 585                 }
 586                 Link* TryThisOne = this->FindLink(x->FailOver.c_str());
 587                 if (TryThisOne)
 588                 {
 589                         TreeServer* CheckDupe = this->FindServer(x->FailOver.c_str());
 590                         if (CheckDupe)
 591                         {
 592                                 ServerInstance->Log(DEBUG,"Skipping existing failover: %s", x->FailOver.c_str());
 593                         }
 594                         else
 595                         {
 596                                 Creator->RemoteMessage(NULL,"FAILOVER: Trying failover link for \002%s\002: \002%s\002...", x->Name.c_str(), TryThisOne->Name.c_str());
 597                                 Creator->ConnectServer(TryThisOne);
 598                         }
 599                 }
 600                 else
 601                 {
 602                         Creator->RemoteMessage(NULL,"FAILOVER: Invalid failover server specified for server \002%s\002, will not follow!", x->Name.c_str());
 603                 }
 604         }
 605 }
 606
 607 Link* SpanningTreeUtilities::FindLink(const std::string& name)
 608 {
 609         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 610         {
 611                 if (ServerInstance->MatchText(x->Name.c_str(), name.c_str()))
 612                 {
 613                         return &(*x);
 614                 }
 615         }
 616         return NULL;
 617 }