src/modules/m_spanningtree/main.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
   5  *   Copyright (C) 2007-2009 Craig Edwards <craigedwards@brainbox.cc>
   6  *   Copyright (C) 2007-2008 Robin Burchell <robin+git@viroteck.net>
   7  *   Copyright (C) 2008 Thomas Stagner <aquanight@inspircd.org>
   8  *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
   9  *
  10  * This file is part of InspIRCd.  InspIRCd is free software: you can
  11  * redistribute it and/or modify it under the terms of the GNU General Public
  12  * License as published by the Free Software Foundation, version 2.
  13  *
  14  * This program is distributed in the hope that it will be useful, but WITHOUT
  15  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  16  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  17  * details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21  */
  22
  23
  24 #include "inspircd.h"
  25 #include "socket.h"
  26 #include "xline.h"
  27 #include "iohook.h"
  28
  29 #include "resolvers.h"
  30 #include "main.h"
  31 #include "utils.h"
  32 #include "treeserver.h"
  33 #include "link.h"
  34 #include "treesocket.h"
  35 #include "commands.h"
  36 #include "protocolinterface.h"
  37
  38 ModuleSpanningTree::ModuleSpanningTree()
  39         : rconnect(this), rsquit(this), map(this)
  40         , commands(NULL), DNS(this, "DNS")
  41 {
  42 }
  43
  44 SpanningTreeCommands::SpanningTreeCommands(ModuleSpanningTree* module)
  45         : svsjoin(module), svspart(module), svsnick(module), metadata(module),
  46         uid(module), opertype(module), fjoin(module), ijoin(module), resync(module),
  47         fmode(module), ftopic(module), fhost(module), fident(module), fname(module),
  48         away(module), addline(module), delline(module), encap(module), idle(module),
  49         nick(module), ping(module), pong(module), push(module), save(module),
  50         server(module), squit(module), snonotice(module), version(module),
  51         burst(module), endburst(module)
  52 {
  53 }
  54
  55 void ModuleSpanningTree::init()
  56 {
  57         ServerInstance->SNO->EnableSnomask('l', "LINK");
  58
  59         Utils = new SpanningTreeUtilities(this);
  60         Utils->TreeRoot = new TreeServer;
  61         commands = new SpanningTreeCommands(this);
  62
  63         delete ServerInstance->PI;
  64         ServerInstance->PI = new SpanningTreeProtocolInterface;
  65         loopCall = false;
  66
  67         // update our local user count
  68         Utils->TreeRoot->UserCount = ServerInstance->Users->local_users.size();
  69 }
  70
  71 void ModuleSpanningTree::ShowLinks(TreeServer* Current, User* user, int hops)
  72 {
  73         std::string Parent = Utils->TreeRoot->GetName();
  74         if (Current->GetParent())
  75         {
  76                 Parent = Current->GetParent()->GetName();
  77         }
  78
  79         const TreeServer::ChildServers& children = Current->GetChildren();
  80         for (TreeServer::ChildServers::const_iterator i = children.begin(); i != children.end(); ++i)
  81         {
  82                 TreeServer* server = *i;
  83                 if ((server->Hidden) || ((Utils->HideULines) && (ServerInstance->ULine(server->GetName()))))
  84                 {
  85                         if (user->IsOper())
  86                         {
  87                                  ShowLinks(server, user, hops+1);
  88                         }
  89                 }
  90                 else
  91                 {
  92                         ShowLinks(server, user, hops+1);
  93                 }
  94         }
  95         /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
  96         if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetName())) && (!user->IsOper()))
  97                 return;
  98         /* Or if the server is hidden and they're not an oper */
  99         else if ((Current->Hidden) && (!user->IsOper()))
 100                 return;
 101
 102         user->WriteNumeric(364, "%s %s %s :%d %s",      user->nick.c_str(), Current->GetName().c_str(),
 103                         (Utils->FlatLinks && (!user->IsOper())) ? ServerInstance->Config->ServerName.c_str() : Parent.c_str(),
 104                         (Utils->FlatLinks && (!user->IsOper())) ? 0 : hops,
 105                         Current->GetDesc().c_str());
 106 }
 107
 108 void ModuleSpanningTree::HandleLinks(const std::vector<std::string>& parameters, User* user)
 109 {
 110         ShowLinks(Utils->TreeRoot,user,0);
 111         user->WriteNumeric(365, "%s * :End of /LINKS list.",user->nick.c_str());
 112 }
 113
 114 std::string ModuleSpanningTree::TimeToStr(time_t secs)
 115 {
 116         time_t mins_up = secs / 60;
 117         time_t hours_up = mins_up / 60;
 118         time_t days_up = hours_up / 24;
 119         secs = secs % 60;
 120         mins_up = mins_up % 60;
 121         hours_up = hours_up % 24;
 122         return ((days_up ? (ConvToStr(days_up) + "d") : "")
 123                         + (hours_up ? (ConvToStr(hours_up) + "h") : "")
 124                         + (mins_up ? (ConvToStr(mins_up) + "m") : "")
 125                         + ConvToStr(secs) + "s");
 126 }
 127
 128 void ModuleSpanningTree::DoPingChecks(time_t curtime)
 129 {
 130         /*
 131          * Cancel remote burst mode on any servers which still have it enabled due to latency/lack of data.
 132          * This prevents lost REMOTECONNECT notices
 133          */
 134         long ts = ServerInstance->Time() * 1000 + (ServerInstance->Time_ns() / 1000000);
 135
 136 restart:
 137         for (server_hash::iterator i = Utils->serverlist.begin(); i != Utils->serverlist.end(); i++)
 138         {
 139                 TreeServer *s = i->second;
 140
 141                 // Skip myself
 142                 if (s->IsRoot())
 143                         continue;
 144
 145                 if (s->GetSocket()->GetLinkState() == DYING)
 146                 {
 147                         s->GetSocket()->Close();
 148                         goto restart;
 149                 }
 150
 151                 // Do not ping servers that are not fully connected yet!
 152                 // Servers which are connected to us have IsLocal() == true and if they're fully connected
 153                 // then Socket->LinkState == CONNECTED. Servers that are linked to another server are always fully connected.
 154                 if (s->IsLocal() && s->GetSocket()->GetLinkState() != CONNECTED)
 155                         continue;
 156
 157                 // Now do PING checks on all servers
 158                 // Only ping if this server needs one
 159                 if (curtime >= s->NextPingTime())
 160                 {
 161                         // And if they answered the last
 162                         if (s->AnsweredLastPing())
 163                         {
 164                                 // They did, send a ping to them
 165                                 s->SetNextPingTime(curtime + Utils->PingFreq);
 166                                 s->GetSocket()->WriteLine(":" + ServerInstance->Config->GetSID() + " PING " + s->GetID());
 167                                 s->LastPingMsec = ts;
 168                         }
 169                         else
 170                         {
 171                                 // They didn't answer the last ping, if they are locally connected, get rid of them.
 172                                 if (s->IsLocal())
 173                                 {
 174                                         TreeSocket* sock = s->GetSocket();
 175                                         sock->SendError("Ping timeout");
 176                                         sock->Close();
 177                                         goto restart;
 178                                 }
 179                         }
 180                 }
 181
 182                 // If warn on ping enabled and not warned and the difference is sufficient and they didn't answer the last ping...
 183                 if ((Utils->PingWarnTime) && (!s->Warned) && (curtime >= s->NextPingTime() - (Utils->PingFreq - Utils->PingWarnTime)) && (!s->AnsweredLastPing()))
 184                 {
 185                         /* The server hasnt responded, send a warning to opers */
 186                         ServerInstance->SNO->WriteToSnoMask('l',"Server \002%s\002 has not responded to PING for %d seconds, high latency.", s->GetName().c_str(), Utils->PingWarnTime);
 187                         s->Warned = true;
 188                 }
 189         }
 190 }
 191
 192 void ModuleSpanningTree::ConnectServer(Autoconnect* a, bool on_timer)
 193 {
 194         if (!a)
 195                 return;
 196         for(unsigned int j=0; j < a->servers.size(); j++)
 197         {
 198                 if (Utils->FindServer(a->servers[j]))
 199                 {
 200                         // found something in this block. Should the server fail,
 201                         // we want to start at the start of the list, not in the
 202                         // middle where we left off
 203                         a->position = -1;
 204                         return;
 205                 }
 206         }
 207         if (on_timer && a->position >= 0)
 208                 return;
 209         if (!on_timer && a->position < 0)
 210                 return;
 211
 212         a->position++;
 213         while (a->position < (int)a->servers.size())
 214         {
 215                 Link* x = Utils->FindLink(a->servers[a->position]);
 216                 if (x)
 217                 {
 218                         ServerInstance->SNO->WriteToSnoMask('l', "AUTOCONNECT: Auto-connecting server \002%s\002", x->Name.c_str());
 219                         ConnectServer(x, a);
 220                         return;
 221                 }
 222                 a->position++;
 223         }
 224         // Autoconnect chain has been fully iterated; start at the beginning on the
 225         // next AutoConnectServers run
 226         a->position = -1;
 227 }
 228
 229 void ModuleSpanningTree::ConnectServer(Link* x, Autoconnect* y)
 230 {
 231         bool ipvalid = true;
 232
 233         if (InspIRCd::Match(ServerInstance->Config->ServerName, assign(x->Name)))
 234         {
 235                 ServerInstance->SNO->WriteToSnoMask('l', "CONNECT: Not connecting to myself.");
 236                 return;
 237         }
 238
 239         DNS::QueryType start_type = DNS::QUERY_AAAA;
 240         if (strchr(x->IPAddr.c_str(),':'))
 241         {
 242                 in6_addr n;
 243                 if (inet_pton(AF_INET6, x->IPAddr.c_str(), &n) < 1)
 244                         ipvalid = false;
 245         }
 246         else
 247         {
 248                 in_addr n;
 249                 if (inet_aton(x->IPAddr.c_str(),&n) < 1)
 250                         ipvalid = false;
 251         }
 252
 253         /* Do we already have an IP? If so, no need to resolve it. */
 254         if (ipvalid)
 255         {
 256                 /* Gave a hook, but it wasnt one we know */
 257                 TreeSocket* newsocket = new TreeSocket(x, y, x->IPAddr);
 258                 if (newsocket->GetFd() > -1)
 259                 {
 260                         /* Handled automatically on success */
 261                 }
 262                 else
 263                 {
 264                         ServerInstance->SNO->WriteToSnoMask('l', "CONNECT: Error connecting \002%s\002: %s.",
 265                                 x->Name.c_str(), newsocket->getError().c_str());
 266                         ServerInstance->GlobalCulls.AddItem(newsocket);
 267                 }
 268         }
 269         else if (!DNS)
 270         {
 271                 ServerInstance->SNO->WriteToSnoMask('l', "CONNECT: Error connecting \002%s\002: Hostname given and m_dns.so is not loaded, unable to resolve.", x->Name.c_str());
 272         }
 273         else
 274         {
 275                 ServernameResolver* snr = new ServernameResolver(*DNS, x->IPAddr, x, start_type, y);
 276                 try
 277                 {
 278                         DNS->Process(snr);
 279                 }
 280                 catch (DNS::Exception& e)
 281                 {
 282                         delete snr;
 283                         ServerInstance->SNO->WriteToSnoMask('l', "CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(), e.GetReason());
 284                         ConnectServer(y, false);
 285                 }
 286         }
 287 }
 288
 289 void ModuleSpanningTree::AutoConnectServers(time_t curtime)
 290 {
 291         for (std::vector<reference<Autoconnect> >::iterator i = Utils->AutoconnectBlocks.begin(); i < Utils->AutoconnectBlocks.end(); ++i)
 292         {
 293                 Autoconnect* x = *i;
 294                 if (curtime >= x->NextConnectTime)
 295                 {
 296                         x->NextConnectTime = curtime + x->Period;
 297                         ConnectServer(x, true);
 298                 }
 299         }
 300 }
 301
 302 void ModuleSpanningTree::DoConnectTimeout(time_t curtime)
 303 {
 304         std::map<TreeSocket*, std::pair<std::string, int> >::iterator i = Utils->timeoutlist.begin();
 305         while (i != Utils->timeoutlist.end())
 306         {
 307                 TreeSocket* s = i->first;
 308                 std::pair<std::string, int> p = i->second;
 309                 std::map<TreeSocket*, std::pair<std::string, int> >::iterator me = i;
 310                 i++;
 311                 if (s->GetLinkState() == DYING)
 312                 {
 313                         Utils->timeoutlist.erase(me);
 314                         s->Close();
 315                 }
 316                 else if (curtime > s->age + p.second)
 317                 {
 318                         ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002 (timeout of %d seconds)",p.first.c_str(),p.second);
 319                         Utils->timeoutlist.erase(me);
 320                         s->Close();
 321                 }
 322         }
 323 }
 324
 325 ModResult ModuleSpanningTree::HandleVersion(const std::vector<std::string>& parameters, User* user)
 326 {
 327         // we've already checked if pcnt > 0, so this is safe
 328         TreeServer* found = Utils->FindServerMask(parameters[0]);
 329         if (found)
 330         {
 331                 if (found == Utils->TreeRoot)
 332                 {
 333                         // Pass to default VERSION handler.
 334                         return MOD_RES_PASSTHRU;
 335                 }
 336                 std::string Version = found->GetVersion();
 337                 user->WriteNumeric(351, "%s :%s",user->nick.c_str(),Version.c_str());
 338         }
 339         else
 340         {
 341                 user->WriteNumeric(402, "%s %s :No such server",user->nick.c_str(),parameters[0].c_str());
 342         }
 343         return MOD_RES_DENY;
 344 }
 345
 346 /* This method will attempt to get a message to a remote user.
 347  */
 348 void ModuleSpanningTree::RemoteMessage(User* user, const char* format, ...)
 349 {
 350         std::string text;
 351         VAFORMAT(text, format, format);
 352
 353         if (IS_LOCAL(user))
 354                 user->WriteNotice(text);
 355         else
 356                 ServerInstance->PI->SendUserNotice(user, text);
 357 }
 358
 359 ModResult ModuleSpanningTree::HandleConnect(const std::vector<std::string>& parameters, User* user)
 360 {
 361         for (std::vector<reference<Link> >::iterator i = Utils->LinkBlocks.begin(); i < Utils->LinkBlocks.end(); i++)
 362         {
 363                 Link* x = *i;
 364                 if (InspIRCd::Match(x->Name.c_str(),parameters[0]))
 365                 {
 366                         if (InspIRCd::Match(ServerInstance->Config->ServerName, assign(x->Name)))
 367                         {
 368                                 RemoteMessage(user, "*** CONNECT: Server \002%s\002 is ME, not connecting.",x->Name.c_str());
 369                                 return MOD_RES_DENY;
 370                         }
 371
 372                         TreeServer* CheckDupe = Utils->FindServer(x->Name.c_str());
 373                         if (!CheckDupe)
 374                         {
 375                                 RemoteMessage(user, "*** CONNECT: Connecting to server: \002%s\002 (%s:%d)",x->Name.c_str(),(x->HiddenFromStats ? "<hidden>" : x->IPAddr.c_str()),x->Port);
 376                                 ConnectServer(x);
 377                                 return MOD_RES_DENY;
 378                         }
 379                         else
 380                         {
 381                                 RemoteMessage(user, "*** CONNECT: Server \002%s\002 already exists on the network and is connected via \002%s\002", x->Name.c_str(), CheckDupe->GetParent()->GetName().c_str());
 382                                 return MOD_RES_DENY;
 383                         }
 384                 }
 385         }
 386         RemoteMessage(user, "*** CONNECT: No server matching \002%s\002 could be found in the config file.",parameters[0].c_str());
 387         return MOD_RES_DENY;
 388 }
 389
 390 void ModuleSpanningTree::On005Numeric(std::map<std::string, std::string>& tokens)
 391 {
 392         tokens["MAP"];
 393 }
 394
 395 void ModuleSpanningTree::OnGetServerDescription(const std::string &servername,std::string &description)
 396 {
 397         TreeServer* s = Utils->FindServer(servername);
 398         if (s)
 399         {
 400                 description = s->GetDesc();
 401         }
 402 }
 403
 404 void ModuleSpanningTree::OnUserInvite(User* source,User* dest,Channel* channel, time_t expiry)
 405 {
 406         if (IS_LOCAL(source))
 407         {
 408                 CmdBuilder params(source, "INVITE");
 409                 params.push_back(dest->uuid);
 410                 params.push_back(channel->name);
 411                 params.push_back(ConvToStr(expiry));
 412                 params.Broadcast();
 413         }
 414 }
 415
 416 void ModuleSpanningTree::OnPostTopicChange(User* user, Channel* chan, const std::string &topic)
 417 {
 418         // Drop remote events on the floor.
 419         if (!IS_LOCAL(user))
 420                 return;
 421
 422         CommandFTopic::Builder(user, chan).Broadcast();
 423 }
 424
 425 void ModuleSpanningTree::OnUserMessage(User* user, void* dest, int target_type, const std::string& text, char status, const CUList& exempt_list, MessageType msgtype)
 426 {
 427         if (!IS_LOCAL(user))
 428                 return;
 429
 430         const char* message_type = (msgtype == MSG_PRIVMSG ? "PRIVMSG" : "NOTICE");
 431         if (target_type == TYPE_USER)
 432         {
 433                 User* d = (User*) dest;
 434                 if (!IS_LOCAL(d))
 435                 {
 436                         CmdBuilder params(user, message_type);
 437                         params.push_back(d->uuid);
 438                         params.push_last(text);
 439                         params.Unicast(d);
 440                 }
 441         }
 442         else if (target_type == TYPE_CHANNEL)
 443         {
 444                 Utils->SendChannelMessage(user->uuid, (Channel*)dest, text, status, exempt_list, message_type);
 445         }
 446         else if (target_type == TYPE_SERVER)
 447         {
 448                 char* target = (char*) dest;
 449                 CmdBuilder par(user, message_type);
 450                 par.push_back(target);
 451                 par.push_last(text);
 452                 par.Broadcast();
 453         }
 454 }
 455
 456 void ModuleSpanningTree::OnBackgroundTimer(time_t curtime)
 457 {
 458         AutoConnectServers(curtime);
 459         DoPingChecks(curtime);
 460         DoConnectTimeout(curtime);
 461 }
 462
 463 void ModuleSpanningTree::OnUserConnect(LocalUser* user)
 464 {
 465         if (user->quitting)
 466                 return;
 467
 468         CommandUID::Builder(user).Broadcast();
 469
 470         if (user->IsOper())
 471                 CommandOpertype::Builder(user).Broadcast();
 472
 473         for(Extensible::ExtensibleStore::const_iterator i = user->GetExtList().begin(); i != user->GetExtList().end(); i++)
 474         {
 475                 ExtensionItem* item = i->first;
 476                 std::string value = item->serialize(FORMAT_NETWORK, user, i->second);
 477                 if (!value.empty())
 478                         ServerInstance->PI->SendMetaData(user, item->name, value);
 479         }
 480
 481         Utils->TreeRoot->UserCount++;
 482 }
 483
 484 void ModuleSpanningTree::OnUserJoin(Membership* memb, bool sync, bool created_by_local, CUList& excepts)
 485 {
 486         // Only do this for local users
 487         if (!IS_LOCAL(memb->user))
 488                 return;
 489
 490         if (created_by_local)
 491         {
 492                 CmdBuilder params("FJOIN");
 493                 params.push_back(memb->chan->name);
 494                 params.push_back(ConvToStr(memb->chan->age));
 495                 params.push_raw(" +").push_raw(memb->chan->ChanModes(true));
 496                 params.push(memb->modes).push_raw(',').push_raw(memb->user->uuid);
 497                 params.Broadcast();
 498         }
 499         else
 500         {
 501                 CmdBuilder params(memb->user, "IJOIN");
 502                 params.push_back(memb->chan->name);
 503                 if (!memb->modes.empty())
 504                 {
 505                         params.push_back(ConvToStr(memb->chan->age));
 506                         params.push_back(memb->modes);
 507                 }
 508                 params.Broadcast();
 509         }
 510 }
 511
 512 void ModuleSpanningTree::OnChangeHost(User* user, const std::string &newhost)
 513 {
 514         if (user->registered != REG_ALL || !IS_LOCAL(user))
 515                 return;
 516
 517         CmdBuilder(user, "FHOST").push(newhost).Broadcast();
 518 }
 519
 520 void ModuleSpanningTree::OnChangeName(User* user, const std::string &gecos)
 521 {
 522         if (user->registered != REG_ALL || !IS_LOCAL(user))
 523                 return;
 524
 525         CmdBuilder(user, "FNAME").push(gecos).Broadcast();
 526 }
 527
 528 void ModuleSpanningTree::OnChangeIdent(User* user, const std::string &ident)
 529 {
 530         if ((user->registered != REG_ALL) || (!IS_LOCAL(user)))
 531                 return;
 532
 533         CmdBuilder(user, "FIDENT").push(ident).Broadcast();
 534 }
 535
 536 void ModuleSpanningTree::OnUserPart(Membership* memb, std::string &partmessage, CUList& excepts)
 537 {
 538         if (IS_LOCAL(memb->user))
 539         {
 540                 CmdBuilder params(memb->user, "PART");
 541                 params.push_back(memb->chan->name);
 542                 if (!partmessage.empty())
 543                         params.push_last(partmessage);
 544                 params.Broadcast();
 545         }
 546 }
 547
 548 void ModuleSpanningTree::OnUserQuit(User* user, const std::string &reason, const std::string &oper_message)
 549 {
 550         if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
 551         {
 552                 if (oper_message != reason)
 553                         ServerInstance->PI->SendMetaData(user, "operquit", oper_message);
 554
 555                 CmdBuilder(user, "QUIT").push_last(reason).Broadcast();
 556         }
 557
 558         // Regardless, We need to modify the user Counts..
 559         TreeServer* SourceServer = Utils->FindServer(user->server);
 560         if (SourceServer)
 561         {
 562                 SourceServer->UserCount--;
 563         }
 564 }
 565
 566 void ModuleSpanningTree::OnUserPostNick(User* user, const std::string &oldnick)
 567 {
 568         if (IS_LOCAL(user))
 569         {
 570                 CmdBuilder params(user, "NICK");
 571                 params.push_back(user->nick);
 572
 573                 /** IMPORTANT: We don't update the TS if the oldnick is just a case change of the newnick!
 574                  */
 575                 if (irc::string(user->nick.c_str()) != assign(oldnick))
 576                         user->age = ServerInstance->Time();
 577
 578                 params.push_back(ConvToStr(user->age));
 579                 params.Broadcast();
 580         }
 581         else if (!loopCall && user->nick == user->uuid)
 582         {
 583                 CmdBuilder params("SAVE");
 584                 params.push_back(user->uuid);
 585                 params.push_back(ConvToStr(user->age));
 586                 params.Broadcast();
 587         }
 588 }
 589
 590 void ModuleSpanningTree::OnUserKick(User* source, Membership* memb, const std::string &reason, CUList& excepts)
 591 {
 592         if ((!IS_LOCAL(source) || source != ServerInstance->FakeClient))
 593                 return;
 594
 595         CmdBuilder params(source, "KICK");
 596         params.push_back(memb->chan->name);
 597         params.push_back(memb->user->uuid);
 598         params.push_last(reason);
 599         params.Broadcast();
 600 }
 601
 602 void ModuleSpanningTree::OnPreRehash(User* user, const std::string &parameter)
 603 {
 604         if (loopCall)
 605                 return; // Don't generate a REHASH here if we're in the middle of processing a message that generated this one
 606
 607         ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "OnPreRehash called with param %s", parameter.c_str());
 608
 609         // Send out to other servers
 610         if (!parameter.empty() && parameter[0] != '-')
 611         {
 612                 CmdBuilder params((user ? user->uuid : ServerInstance->Config->GetSID()), "REHASH");
 613                 params.push_back(parameter);
 614                 params.Forward(user ? Utils->BestRouteTo(user->server) : NULL);
 615         }
 616 }
 617
 618 void ModuleSpanningTree::ReadConfig(ConfigStatus& status)
 619 {
 620         // Re-read config stuff
 621         try
 622         {
 623                 Utils->ReadConfiguration();
 624         }
 625         catch (ModuleException& e)
 626         {
 627                 // Refresh the IP cache anyway, so servers read before the error will be allowed to connect
 628                 Utils->RefreshIPCache();
 629                 // Always warn local opers with snomask +l, also warn globally (snomask +L) if the rehash was issued by a remote user
 630                 std::string msg = "Error in configuration: ";
 631                 msg.append(e.GetReason());
 632                 ServerInstance->SNO->WriteToSnoMask('l', msg);
 633                 if (status.srcuser && !IS_LOCAL(status.srcuser))
 634                         ServerInstance->PI->SendSNONotice("L", msg);
 635         }
 636 }
 637
 638 void ModuleSpanningTree::OnLoadModule(Module* mod)
 639 {
 640         std::string data;
 641         data.push_back('+');
 642         data.append(mod->ModuleSourceFile);
 643         Version v = mod->GetVersion();
 644         if (!v.link_data.empty())
 645         {
 646                 data.push_back('=');
 647                 data.append(v.link_data);
 648         }
 649         ServerInstance->PI->SendMetaData("modules", data);
 650 }
 651
 652 void ModuleSpanningTree::OnUnloadModule(Module* mod)
 653 {
 654         if (!Utils)
 655                 return;
 656         ServerInstance->PI->SendMetaData("modules", "-" + mod->ModuleSourceFile);
 657
 658         // Close all connections which use an IO hook provided by this module
 659         const TreeServer::ChildServers& list = Utils->TreeRoot->GetChildren();
 660         for (TreeServer::ChildServers::const_iterator i = list.begin(); i != list.end(); ++i)
 661         {
 662                 TreeSocket* sock = (*i)->GetSocket();
 663                 if (sock && sock->GetIOHook() && sock->GetIOHook()->creator == mod)
 664                 {
 665                         sock->SendError("SSL module unloaded");
 666                         sock->Close();
 667                 }
 668         }
 669
 670         for (SpanningTreeUtilities::TimeoutList::const_iterator i = Utils->timeoutlist.begin(); i != Utils->timeoutlist.end(); ++i)
 671         {
 672                 TreeSocket* sock = i->first;
 673                 if (sock->GetIOHook() && sock->GetIOHook()->creator == mod)
 674                         sock->Close();
 675         }
 676 }
 677
 678 // note: the protocol does not allow direct umode +o except
 679 // via NICK with 8 params. sending OPERTYPE infers +o modechange
 680 // locally.
 681 void ModuleSpanningTree::OnOper(User* user, const std::string &opertype)
 682 {
 683         if (user->registered != REG_ALL || !IS_LOCAL(user))
 684                 return;
 685         CommandOpertype::Builder(user).Broadcast();
 686 }
 687
 688 void ModuleSpanningTree::OnAddLine(User* user, XLine *x)
 689 {
 690         if (!x->IsBurstable() || loopCall || (user && !IS_LOCAL(user)))
 691                 return;
 692
 693         if (!user)
 694                 user = ServerInstance->FakeClient;
 695
 696         CommandAddLine::Builder(x, user).Broadcast();
 697 }
 698
 699 void ModuleSpanningTree::OnDelLine(User* user, XLine *x)
 700 {
 701         if (!x->IsBurstable() || loopCall || (user && !IS_LOCAL(user)))
 702                 return;
 703
 704         if (!user)
 705                 user = ServerInstance->FakeClient;
 706
 707         CmdBuilder params(user, "DELLINE");
 708         params.push_back(x->type);
 709         params.push_back(x->Displayable());
 710         params.Broadcast();
 711 }
 712
 713 ModResult ModuleSpanningTree::OnSetAway(User* user, const std::string &awaymsg)
 714 {
 715         if (IS_LOCAL(user))
 716                 CommandAway::Builder(user, awaymsg).Broadcast();
 717
 718         return MOD_RES_PASSTHRU;
 719 }
 720
 721 CullResult ModuleSpanningTree::cull()
 722 {
 723         if (Utils)
 724                 Utils->cull();
 725         return this->Module::cull();
 726 }
 727
 728 ModuleSpanningTree::~ModuleSpanningTree()
 729 {
 730         delete ServerInstance->PI;
 731         ServerInstance->PI = new ProtocolInterface;
 732
 733         /* This will also free the listeners */
 734         delete Utils;
 735
 736         delete commands;
 737 }
 738
 739 Version ModuleSpanningTree::GetVersion()
 740 {
 741         return Version("Allows servers to be linked", VF_VENDOR);
 742 }
 743
 744 /* It is IMPORTANT that m_spanningtree is the last module in the chain
 745  * so that any activity it sees is FINAL, e.g. we arent going to send out
 746  * a NICK message before m_cloaking has finished putting the +x on the user,
 747  * etc etc.
 748  * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
 749  * the module call queue.
 750  */
 751 void ModuleSpanningTree::Prioritize()
 752 {
 753         ServerInstance->Modules->SetPriority(this, PRIORITY_LAST);
 754 }
 755
 756 MODULE_INIT(ModuleSpanningTree)