2 * InspIRCd -- Internet Relay Chat Daemon
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>
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.
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
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/>.
28 #include "modules/spanningtree.h"
30 #include "resolvers.h"
33 #include "treeserver.h"
35 #include "treesocket.h"
37 #include "translate.h"
39 ModuleSpanningTree::ModuleSpanningTree()
40 : rconnect(this), rsquit(this), map(this)
43 , eventprov(this, "event/spanningtree")
49 SpanningTreeCommands::SpanningTreeCommands(ModuleSpanningTree* module)
50 : svsjoin(module), svspart(module), svsnick(module), metadata(module),
51 uid(module), opertype(module), fjoin(module), ijoin(module), resync(module),
52 fmode(module), ftopic(module), fhost(module), fident(module), fname(module),
53 away(module), addline(module), delline(module), encap(module), idle(module),
54 nick(module), ping(module), pong(module), save(module),
55 server(module), squit(module), snonotice(module),
56 endburst(module), sinfo(module), num(module)
62 void SetLocalUsersServer(Server* newserver)
64 // Does not change the server of quitting users because those are not in the list
66 ServerInstance->FakeClient->server = newserver;
67 const UserManager::LocalList& list = ServerInstance->Users.GetLocalUsers();
68 for (UserManager::LocalList::const_iterator i = list.begin(); i != list.end(); ++i)
69 (*i)->server = newserver;
72 void ResetMembershipIds()
74 // Set all membership ids to 0
75 const UserManager::LocalList& list = ServerInstance->Users.GetLocalUsers();
76 for (UserManager::LocalList::iterator i = list.begin(); i != list.end(); ++i)
79 for (User::ChanList::iterator j = user->chans.begin(); j != user->chans.end(); ++j)
85 void ModuleSpanningTree::init()
87 ServerInstance->SNO->EnableSnomask('l', "LINK");
91 Utils = new SpanningTreeUtilities(this);
92 Utils->TreeRoot = new TreeServer;
94 ServerInstance->PI = &protocolinterface;
96 delete ServerInstance->FakeClient->server;
97 SetLocalUsersServer(Utils->TreeRoot);
100 void ModuleSpanningTree::ShowLinks(TreeServer* Current, User* user, int hops)
102 std::string Parent = Utils->TreeRoot->GetName();
103 if (Current->GetParent())
105 Parent = Current->GetParent()->GetName();
108 const TreeServer::ChildServers& children = Current->GetChildren();
109 for (TreeServer::ChildServers::const_iterator i = children.begin(); i != children.end(); ++i)
111 TreeServer* server = *i;
112 if ((server->Hidden) || ((Utils->HideULines) && (server->IsULine())))
116 ShowLinks(server, user, hops+1);
121 ShowLinks(server, user, hops+1);
124 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
125 if ((Utils->HideULines) && (Current->IsULine()) && (!user->IsOper()))
127 /* Or if the server is hidden and they're not an oper */
128 else if ((Current->Hidden) && (!user->IsOper()))
131 user->WriteNumeric(RPL_LINKS, Current->GetName(),
132 (((Utils->FlatLinks) && (!user->IsOper())) ? ServerInstance->Config->ServerName : Parent),
133 InspIRCd::Format("%d %s", (((Utils->FlatLinks) && (!user->IsOper())) ? 0 : hops), Current->GetDesc().c_str()));
136 void ModuleSpanningTree::HandleLinks(const std::vector<std::string>& parameters, User* user)
138 ShowLinks(Utils->TreeRoot,user,0);
139 user->WriteNumeric(RPL_ENDOFLINKS, '*', "End of /LINKS list.");
142 std::string ModuleSpanningTree::TimeToStr(time_t secs)
144 time_t mins_up = secs / 60;
145 time_t hours_up = mins_up / 60;
146 time_t days_up = hours_up / 24;
148 mins_up = mins_up % 60;
149 hours_up = hours_up % 24;
150 return ((days_up ? (ConvToStr(days_up) + "d") : "")
151 + (hours_up ? (ConvToStr(hours_up) + "h") : "")
152 + (mins_up ? (ConvToStr(mins_up) + "m") : "")
153 + ConvToStr(secs) + "s");
156 void ModuleSpanningTree::ConnectServer(Autoconnect* a, bool on_timer)
160 for(unsigned int j=0; j < a->servers.size(); j++)
162 if (Utils->FindServer(a->servers[j]))
164 // found something in this block. Should the server fail,
165 // we want to start at the start of the list, not in the
166 // middle where we left off
171 if (on_timer && a->position >= 0)
173 if (!on_timer && a->position < 0)
177 while (a->position < (int)a->servers.size())
179 Link* x = Utils->FindLink(a->servers[a->position]);
182 ServerInstance->SNO->WriteToSnoMask('l', "AUTOCONNECT: Auto-connecting server \002%s\002", x->Name.c_str());
188 // Autoconnect chain has been fully iterated; start at the beginning on the
189 // next AutoConnectServers run
193 void ModuleSpanningTree::ConnectServer(Link* x, Autoconnect* y)
197 if (InspIRCd::Match(ServerInstance->Config->ServerName, x->Name, ascii_case_insensitive_map))
199 ServerInstance->SNO->WriteToSnoMask('l', "CONNECT: Not connecting to myself.");
203 if (strchr(x->IPAddr.c_str(),':'))
206 if (inet_pton(AF_INET6, x->IPAddr.c_str(), &n) < 1)
212 if (inet_aton(x->IPAddr.c_str(),&n) < 1)
216 /* Do we already have an IP? If so, no need to resolve it. */
219 // Create a TreeServer object that will start connecting immediately in the background
220 TreeSocket* newsocket = new TreeSocket(x, y, x->IPAddr);
221 if (newsocket->GetFd() > -1)
223 /* Handled automatically on success */
227 ServerInstance->SNO->WriteToSnoMask('l', "CONNECT: Error connecting \002%s\002: %s.",
228 x->Name.c_str(), newsocket->getError().c_str());
229 ServerInstance->GlobalCulls.AddItem(newsocket);
234 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());
238 // Guess start_type from bindip aftype
239 DNS::QueryType start_type = DNS::QUERY_AAAA;
240 irc::sockets::sockaddrs bind;
241 if ((!x->Bind.empty()) && (irc::sockets::aptosa(x->Bind, 0, bind)))
243 if (bind.sa.sa_family == AF_INET)
244 start_type = DNS::QUERY_A;
247 ServernameResolver* snr = new ServernameResolver(*DNS, x->IPAddr, x, start_type, y);
252 catch (DNS::Exception& e)
255 ServerInstance->SNO->WriteToSnoMask('l', "CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(), e.GetReason().c_str());
256 ConnectServer(y, false);
261 void ModuleSpanningTree::AutoConnectServers(time_t curtime)
263 for (std::vector<reference<Autoconnect> >::iterator i = Utils->AutoconnectBlocks.begin(); i < Utils->AutoconnectBlocks.end(); ++i)
266 if (curtime >= x->NextConnectTime)
268 x->NextConnectTime = curtime + x->Period;
269 ConnectServer(x, true);
274 void ModuleSpanningTree::DoConnectTimeout(time_t curtime)
276 std::map<TreeSocket*, std::pair<std::string, int> >::iterator i = Utils->timeoutlist.begin();
277 while (i != Utils->timeoutlist.end())
279 TreeSocket* s = i->first;
280 std::pair<std::string, int> p = i->second;
281 std::map<TreeSocket*, std::pair<std::string, int> >::iterator me = i;
283 if (s->GetLinkState() == DYING)
285 Utils->timeoutlist.erase(me);
288 else if (curtime > s->age + p.second)
290 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002 (timeout of %d seconds)",p.first.c_str(),p.second);
291 Utils->timeoutlist.erase(me);
297 ModResult ModuleSpanningTree::HandleVersion(const std::vector<std::string>& parameters, User* user)
299 // We've already confirmed that !parameters.empty(), so this is safe
300 TreeServer* found = Utils->FindServerMask(parameters[0]);
303 if (found == Utils->TreeRoot)
305 // Pass to default VERSION handler.
306 return MOD_RES_PASSTHRU;
309 // If an oper wants to see the version then show the full version string instead of the normal,
310 // but only if it is non-empty.
311 // If it's empty it might be that the server is still syncing (full version hasn't arrived yet)
312 // or the server is a 2.0 server and does not send a full version.
313 bool showfull = ((user->IsOper()) && (!found->GetFullVersion().empty()));
314 const std::string& Version = (showfull ? found->GetFullVersion() : found->GetVersion());
315 user->WriteNumeric(RPL_VERSION, Version);
319 user->WriteNumeric(ERR_NOSUCHSERVER, parameters[0], "No such server");
324 ModResult ModuleSpanningTree::HandleConnect(const std::vector<std::string>& parameters, User* user)
326 for (std::vector<reference<Link> >::iterator i = Utils->LinkBlocks.begin(); i < Utils->LinkBlocks.end(); i++)
329 if (InspIRCd::Match(x->Name, parameters[0], ascii_case_insensitive_map))
331 if (InspIRCd::Match(ServerInstance->Config->ServerName, x->Name, ascii_case_insensitive_map))
333 user->WriteRemoteNotice(InspIRCd::Format("*** CONNECT: Server \002%s\002 is ME, not connecting.", x->Name.c_str()));
337 TreeServer* CheckDupe = Utils->FindServer(x->Name);
340 user->WriteRemoteNotice(InspIRCd::Format("*** CONNECT: Connecting to server: \002%s\002 (%s:%d)", x->Name.c_str(), (x->HiddenFromStats ? "<hidden>" : x->IPAddr.c_str()), x->Port));
346 user->WriteRemoteNotice(InspIRCd::Format("*** 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()));
351 user->WriteRemoteNotice(InspIRCd::Format("*** CONNECT: No server matching \002%s\002 could be found in the config file.", parameters[0].c_str()));
355 void ModuleSpanningTree::OnUserInvite(User* source, User* dest, Channel* channel, time_t expiry, unsigned int notifyrank, CUList& notifyexcepts)
357 if (IS_LOCAL(source))
359 CmdBuilder params(source, "INVITE");
360 params.push_back(dest->uuid);
361 params.push_back(channel->name);
362 params.push_int(channel->age);
363 params.push_back(ConvToStr(expiry));
368 ModResult ModuleSpanningTree::OnPreTopicChange(User* user, Channel* chan, const std::string& topic)
370 // XXX: Deny topic changes if the current topic set time is the current time or is in the future because
371 // other servers will drop our FTOPIC. This restriction will be removed when the protocol is updated.
372 if ((chan->topicset >= ServerInstance->Time()) && (Utils->serverlist.size() > 1))
374 user->WriteNumeric(ERR_CHANOPRIVSNEEDED, chan->name, "Retry topic change later");
377 return MOD_RES_PASSTHRU;
380 void ModuleSpanningTree::OnPostTopicChange(User* user, Channel* chan, const std::string &topic)
382 // Drop remote events on the floor.
386 CommandFTopic::Builder(user, chan).Broadcast();
389 void ModuleSpanningTree::OnUserMessage(User* user, void* dest, int target_type, const std::string& text, char status, const CUList& exempt_list, MessageType msgtype)
394 const char* message_type = (msgtype == MSG_PRIVMSG ? "PRIVMSG" : "NOTICE");
395 if (target_type == TYPE_USER)
397 User* d = (User*) dest;
400 CmdBuilder params(user, message_type);
401 params.push_back(d->uuid);
402 params.push_last(text);
406 else if (target_type == TYPE_CHANNEL)
408 Utils->SendChannelMessage(user->uuid, (Channel*)dest, text, status, exempt_list, message_type);
410 else if (target_type == TYPE_SERVER)
412 char* target = (char*) dest;
413 CmdBuilder par(user, message_type);
414 par.push_back(target);
420 void ModuleSpanningTree::OnBackgroundTimer(time_t curtime)
422 AutoConnectServers(curtime);
423 DoConnectTimeout(curtime);
426 void ModuleSpanningTree::OnUserConnect(LocalUser* user)
431 CommandUID::Builder(user).Broadcast();
434 CommandOpertype::Builder(user).Broadcast();
436 for(Extensible::ExtensibleStore::const_iterator i = user->GetExtList().begin(); i != user->GetExtList().end(); i++)
438 ExtensionItem* item = i->first;
439 std::string value = item->serialize(FORMAT_NETWORK, user, i->second);
441 ServerInstance->PI->SendMetaData(user, item->name, value);
444 Utils->TreeRoot->UserCount++;
447 void ModuleSpanningTree::OnUserJoin(Membership* memb, bool sync, bool created_by_local, CUList& excepts)
449 // Only do this for local users
450 if (!IS_LOCAL(memb->user))
453 // Assign the current membership id to the new Membership and increase it
454 memb->id = currmembid++;
456 if (created_by_local)
458 CommandFJoin::Builder params(memb->chan);
465 CmdBuilder params(memb->user, "IJOIN");
466 params.push_back(memb->chan->name);
467 params.push_int(memb->id);
468 if (!memb->modes.empty())
470 params.push_back(ConvToStr(memb->chan->age));
471 params.push_back(memb->modes);
477 void ModuleSpanningTree::OnChangeHost(User* user, const std::string &newhost)
479 if (user->registered != REG_ALL || !IS_LOCAL(user))
482 CmdBuilder(user, "FHOST").push(newhost).Broadcast();
485 void ModuleSpanningTree::OnChangeName(User* user, const std::string &gecos)
487 if (user->registered != REG_ALL || !IS_LOCAL(user))
490 CmdBuilder(user, "FNAME").push_last(gecos).Broadcast();
493 void ModuleSpanningTree::OnChangeIdent(User* user, const std::string &ident)
495 if ((user->registered != REG_ALL) || (!IS_LOCAL(user)))
498 CmdBuilder(user, "FIDENT").push(ident).Broadcast();
501 void ModuleSpanningTree::OnUserPart(Membership* memb, std::string &partmessage, CUList& excepts)
503 if (IS_LOCAL(memb->user))
505 CmdBuilder params(memb->user, "PART");
506 params.push_back(memb->chan->name);
507 if (!partmessage.empty())
508 params.push_last(partmessage);
513 void ModuleSpanningTree::OnUserQuit(User* user, const std::string &reason, const std::string &oper_message)
517 if (oper_message != reason)
518 ServerInstance->PI->SendMetaData(user, "operquit", oper_message);
520 CmdBuilder(user, "QUIT").push_last(reason).Broadcast();
524 // Hide the message if one of the following is true:
525 // - User is being quit due to a netsplit and quietbursts is on
526 // - Server is a silent uline
527 TreeServer* server = TreeServer::Get(user);
528 bool hide = (((server->IsDead()) && (Utils->quiet_bursts)) || (server->IsSilentULine()));
531 ServerInstance->SNO->WriteToSnoMask('Q', "Client exiting on server %s: %s (%s) [%s]",
532 user->server->GetName().c_str(), user->GetFullRealHost().c_str(), user->GetIPString().c_str(), oper_message.c_str());
536 // Regardless, update the UserCount
537 TreeServer::Get(user)->UserCount--;
540 void ModuleSpanningTree::OnUserPostNick(User* user, const std::string &oldnick)
544 // The nick TS is updated by the core, we don't do it
545 CmdBuilder params(user, "NICK");
546 params.push_back(user->nick);
547 params.push_back(ConvToStr(user->age));
552 ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "WARNING: Changed nick of remote user %s from %s to %s TS %lu by ourselves!", user->uuid.c_str(), oldnick.c_str(), user->nick.c_str(), (unsigned long) user->age);
556 void ModuleSpanningTree::OnUserKick(User* source, Membership* memb, const std::string &reason, CUList& excepts)
558 if ((!IS_LOCAL(source)) && (source != ServerInstance->FakeClient))
561 CmdBuilder params(source, "KICK");
562 params.push_back(memb->chan->name);
563 params.push_back(memb->user->uuid);
564 // If a remote user is being kicked by us then send the membership id in the kick too
565 if (!IS_LOCAL(memb->user))
566 params.push_int(memb->id);
567 params.push_last(reason);
571 void ModuleSpanningTree::OnPreRehash(User* user, const std::string ¶meter)
574 return; // Don't generate a REHASH here if we're in the middle of processing a message that generated this one
576 ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "OnPreRehash called with param %s", parameter.c_str());
578 // Send out to other servers
579 if (!parameter.empty() && parameter[0] != '-')
581 CmdBuilder params((user ? user->uuid : ServerInstance->Config->GetSID()), "REHASH");
582 params.push_back(parameter);
583 params.Forward(user ? TreeServer::Get(user)->GetRoute() : NULL);
587 void ModuleSpanningTree::ReadConfig(ConfigStatus& status)
589 // Did this rehash change the description of this server?
590 const std::string& newdesc = ServerInstance->Config->ServerDesc;
591 if (newdesc != Utils->TreeRoot->GetDesc())
593 // Broadcast a SINFO desc message to let the network know about the new description. This is the description
594 // string that is sent in the SERVER message initially and shown for example in WHOIS.
595 // We don't need to update the field itself in the Server object - the core does that.
596 CommandSInfo::Builder(Utils->TreeRoot, "desc", newdesc).Broadcast();
599 // Re-read config stuff
602 Utils->ReadConfiguration();
604 catch (ModuleException& e)
606 // Refresh the IP cache anyway, so servers read before the error will be allowed to connect
607 Utils->RefreshIPCache();
608 // Always warn local opers with snomask +l, also warn globally (snomask +L) if the rehash was issued by a remote user
609 std::string msg = "Error in configuration: ";
610 msg.append(e.GetReason());
611 ServerInstance->SNO->WriteToSnoMask('l', msg);
612 if (status.srcuser && !IS_LOCAL(status.srcuser))
613 ServerInstance->PI->SendSNONotice('L', msg);
617 void ModuleSpanningTree::OnLoadModule(Module* mod)
621 data.append(mod->ModuleSourceFile);
622 Version v = mod->GetVersion();
623 if (!v.link_data.empty())
626 data.append(v.link_data);
628 ServerInstance->PI->SendMetaData("modules", data);
631 void ModuleSpanningTree::OnUnloadModule(Module* mod)
635 ServerInstance->PI->SendMetaData("modules", "-" + mod->ModuleSourceFile);
639 // We are being unloaded, inform modules about all servers splitting which cannot be done later when the servers are actually disconnected
640 const server_hash& servers = Utils->serverlist;
641 for (server_hash::const_iterator i = servers.begin(); i != servers.end(); ++i)
643 TreeServer* server = i->second;
644 if (!server->IsRoot())
645 FOREACH_MOD_CUSTOM(GetEventProvider(), SpanningTreeEventListener, OnServerSplit, (server));
650 // Some other module is being unloaded. If it provides an IOHook we use, we must close that server connection now.
653 // Close all connections which use an IO hook provided by this module
654 const TreeServer::ChildServers& list = Utils->TreeRoot->GetChildren();
655 for (TreeServer::ChildServers::const_iterator i = list.begin(); i != list.end(); ++i)
657 TreeSocket* sock = (*i)->GetSocket();
658 if (sock->GetModHook(mod))
660 sock->SendError("SSL module unloaded");
662 // XXX: The list we're iterating is modified by TreeServer::SQuit() which is called by Close()
667 for (SpanningTreeUtilities::TimeoutList::const_iterator i = Utils->timeoutlist.begin(); i != Utils->timeoutlist.end(); ++i)
669 TreeSocket* sock = i->first;
670 if (sock->GetModHook(mod))
675 void ModuleSpanningTree::OnOper(User* user, const std::string &opertype)
677 if (user->registered != REG_ALL || !IS_LOCAL(user))
680 // Note: The protocol does not allow direct umode +o;
681 // sending OPERTYPE infers +o modechange locally.
682 CommandOpertype::Builder(user).Broadcast();
685 void ModuleSpanningTree::OnAddLine(User* user, XLine *x)
687 if (!x->IsBurstable() || loopCall || (user && !IS_LOCAL(user)))
691 user = ServerInstance->FakeClient;
693 CommandAddLine::Builder(x, user).Broadcast();
696 void ModuleSpanningTree::OnDelLine(User* user, XLine *x)
698 if (!x->IsBurstable() || loopCall || (user && !IS_LOCAL(user)))
702 user = ServerInstance->FakeClient;
704 CmdBuilder params(user, "DELLINE");
705 params.push_back(x->type);
706 params.push_back(x->Displayable());
710 ModResult ModuleSpanningTree::OnSetAway(User* user, const std::string &awaymsg)
713 CommandAway::Builder(user, awaymsg).Broadcast();
715 return MOD_RES_PASSTHRU;
718 void ModuleSpanningTree::OnMode(User* source, User* u, Channel* c, const Modes::ChangeList& modes, ModeParser::ModeProcessFlag processflags, const std::string& output_mode)
720 if (processflags & ModeParser::MODE_LOCALONLY)
725 if (u->registered != REG_ALL)
728 CmdBuilder params(source, "MODE");
729 params.push(u->uuid);
730 params.push(output_mode);
731 params.push_raw(Translate::ModeChangeListToParams(modes.getlist()));
736 CmdBuilder params(source, "FMODE");
737 params.push(c->name);
738 params.push_int(c->age);
739 params.push(output_mode);
740 params.push_raw(Translate::ModeChangeListToParams(modes.getlist()));
745 CullResult ModuleSpanningTree::cull()
749 return this->Module::cull();
752 ModuleSpanningTree::~ModuleSpanningTree()
754 ServerInstance->PI = &ServerInstance->DefaultProtocolInterface;
756 Server* newsrv = new Server(ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc);
757 SetLocalUsersServer(newsrv);
762 Version ModuleSpanningTree::GetVersion()
764 return Version("Allows servers to be linked", VF_VENDOR);
767 /* It is IMPORTANT that m_spanningtree is the last module in the chain
768 * so that any activity it sees is FINAL, e.g. we arent going to send out
769 * a NICK message before m_cloaking has finished putting the +x on the user,
771 * Therefore, we set our priority to PRIORITY_LAST to make sure we end up at the END of
772 * the module call queue.
774 void ModuleSpanningTree::Prioritize()
776 ServerInstance->Modules->SetPriority(this, PRIORITY_LAST);
777 ServerInstance->Modules.SetPriority(this, I_OnPreTopicChange, PRIORITY_FIRST);
780 MODULE_INIT(ModuleSpanningTree)