X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fmodules%2Fm_permchannels.cpp;h=ff1a35ba913e62bbe3ed1cf1cb4daac0daa703ed;hb=bbeb5ea38686dfeb9537860770bbdb3bd2f9cd3f;hp=ff269934e6fd111b434ca8d7caaa9fc14d006531;hpb=0da6b3a13def40e8fd002b9fc60f955467f6372d;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/modules/m_permchannels.cpp b/src/modules/m_permchannels.cpp index ff269934e..ff1a35ba9 100644 --- a/src/modules/m_permchannels.cpp +++ b/src/modules/m_permchannels.cpp @@ -1,36 +1,103 @@ -/* +------------------------------------+ - * | Inspire Internet Relay Chat Daemon | - * +------------------------------------+ +/* + * InspIRCd -- Internet Relay Chat Daemon * - * InspIRCd: (C) 2002-2009 InspIRCd Development Team - * See: http://wiki.inspircd.org/Credits + * Copyright (C) 2009-2010 Daniel De Graaf + * Copyright (C) 2008-2009 Robin Burchell * - * This program is free but copyrighted software; see - * the file COPYING for details. + * This file is part of InspIRCd. InspIRCd is free software: you can + * redistribute it and/or modify it under the terms of the GNU General Public + * License as published by the Free Software Foundation, version 2. * - * --------------------------------------------------- + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS + * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more + * details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . */ + #include "inspircd.h" +#include /* $ModDesc: Provides support for channel mode +P to provide permanent channels */ +// Not in a class due to circular dependancy hell. +static std::string permchannelsconf; +static bool WriteDatabase() +{ + /* + * We need to perform an atomic write so as not to fuck things up. + * So, let's write to a temporary file, flush it, then rename the file.. + * -- w00t + */ + + // If the user has not specified a configuration file then we don't write one. + if (permchannelsconf.empty()) + return true; + + std::string permchannelsnewconf = permchannelsconf + ".tmp"; + std::ofstream stream(permchannelsnewconf.c_str()); + if (!stream.is_open()) + { + ServerInstance->Logs->Log("m_permchannels", LOG_DEFAULT, "permchannels: Cannot create database! %s (%d)", strerror(errno), errno); + ServerInstance->SNO->WriteToSnoMask('a', "database: cannot create new db: %s (%d)", strerror(errno), errno); + return false; + } + + stream << "# This file is automatically generated by m_permchannels. Any changes will be overwritten." << std::endl + << "" << std::endl; + + for (chan_hash::const_iterator i = ServerInstance->chanlist->begin(); i != ServerInstance->chanlist->end(); i++) + { + Channel* chan = i->second; + if (!chan->IsModeSet('P')) + continue; + + stream << "name) + << "\" topic=\"" << ServerConfig::Escape(chan->topic) + << "\" modes=\"" << ServerConfig::Escape(chan->ChanModes(true)) + << "\">" << std::endl; + } + + if (stream.fail()) + { + ServerInstance->Logs->Log("m_permchannels", LOG_DEFAULT, "permchannels: Cannot write to new database! %s (%d)", strerror(errno), errno); + ServerInstance->SNO->WriteToSnoMask('a', "database: cannot write to new db: %s (%d)", strerror(errno), errno); + return false; + } + stream.close(); + +#ifdef _WIN32 + if (remove(permchannelsconf.c_str())) + { + ServerInstance->Logs->Log("m_permchannels", LOG_DEFAULT, "permchannels: Cannot remove old database! %s (%d)", strerror(errno), errno); + ServerInstance->SNO->WriteToSnoMask('a', "database: cannot remove old database: %s (%d)", strerror(errno), errno); + return false; + } +#endif + // Use rename to move temporary to new db - this is guarenteed not to fuck up, even in case of a crash. + if (rename(permchannelsnewconf.c_str(), permchannelsconf.c_str()) < 0) + { + ServerInstance->Logs->Log("m_permchannels", LOG_DEFAULT, "permchannels: Cannot move new to old database! %s (%d)", strerror(errno), errno); + ServerInstance->SNO->WriteToSnoMask('a', "database: cannot replace old with new db: %s (%d)", strerror(errno), errno); + return false; + } + + return true; +} + /** Handles the +P channel mode */ class PermChannel : public ModeHandler { public: - PermChannel(InspIRCd* Instance) : ModeHandler(Instance, 'P', 0, 0, false, MODETYPE_CHANNEL, false) { } + PermChannel(Module* Creator) : ModeHandler(Creator, "permanent", 'P', PARAM_NONE, MODETYPE_CHANNEL) { oper = true; } - ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding, bool sm) + ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding) { - if (!source->HasPrivPermission("channels/set-permanent")) - { - source->WriteNumeric(ERR_NOPRIVILEGES, "%s :Permission Denied - You do not have the required operator privileges", source->nick.c_str()); - return MODEACTION_DENY; - } - if (adding) { if (!channel->IsModeSet('P')) @@ -43,30 +110,8 @@ class PermChannel : public ModeHandler { if (channel->IsModeSet('P')) { - if (channel->GetUserCounter() == 0 && !sm) - { - /* - * ugh, ugh, UGH! - * - * We can't delete this channel the way things work at the moment, - * because of the following scenario: - * s1:#c <-> s2:#c - * - * s1 has a user in #c, s2 does not. s2 has +P set. s2 has a losing TS. - * - * On netmerge, s2 loses, so s2 removes all modes (including +P) which - * would subsequently delete the channel here causing big fucking problems. - * - * I don't think there's really a way around this, so just deny -P on a 0 user chan. - * -- w00t - * - * delete channel; - */ - return MODEACTION_DENY; - } - - /* for servers, remove +P (to avoid desyncs) but don't bother trying to delete. */ - channel->SetMode('P',false); + channel->SetMode(this,false); + channel->CheckDestroy(); return MODEACTION_ALLOW; } } @@ -77,45 +122,71 @@ class PermChannel : public ModeHandler class ModulePermanentChannels : public Module { - PermChannel *p; + PermChannel p; + bool dirty; public: - ModulePermanentChannels(InspIRCd* Me) : Module(Me) + ModulePermanentChannels() : p(this), dirty(false) { - p = new PermChannel(ServerInstance); - if (!ServerInstance->Modes->AddMode(p)) - { - delete p; - throw ModuleException("Could not add new modes!"); - } - Implementation eventlist[] = { I_OnChannelPreDelete }; - ServerInstance->Modules->Attach(eventlist, this, 1); + } + + void init() CXX11_OVERRIDE + { + ServerInstance->Modules->AddService(p); + Implementation eventlist[] = { I_OnChannelPreDelete, I_OnPostTopicChange, I_OnRawMode, I_OnRehash, I_OnBackgroundTimer }; + ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation)); OnRehash(NULL); } - virtual ~ModulePermanentChannels() + CullResult cull() + { + /* + * DelMode can't remove the +P mode on empty channels, or it will break + * merging modes with remote servers. Remove the empty channels now as + * we know this is not the case. + */ + chan_hash::iterator iter = ServerInstance->chanlist->begin(); + while (iter != ServerInstance->chanlist->end()) + { + Channel* c = iter->second; + if (c->GetUserCounter() == 0) + { + chan_hash::iterator at = iter; + iter++; + FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(c)); + ServerInstance->chanlist->erase(at); + ServerInstance->GlobalCulls.AddItem(c); + } + else + iter++; + } + ServerInstance->Modes->DelMode(&p); + return Module::cull(); + } + + void OnRehash(User *user) CXX11_OVERRIDE { - ServerInstance->Modes->DelMode(p); - delete p; + permchannelsconf = ServerInstance->Config->ConfValue("permchanneldb")->getString("filename"); } - virtual void OnRehash(User *user) + void LoadDatabase() { /* * Process config-defined list of permanent channels. * -- w00t */ - ConfigReader MyConf(ServerInstance); - for (int i = 0; i < MyConf.Enumerate("permchannels"); i++) + ConfigTagList permchannels = ServerInstance->Config->ConfTags("permchannels"); + for (ConfigIter i = permchannels.first; i != permchannels.second; ++i) { - std::string channel = MyConf.ReadValue("permchannels", "channel", i); - std::string topic = MyConf.ReadValue("permchannels", "topic", i); - std::string modes = MyConf.ReadValue("permchannels", "modes", i); + ConfigTag* tag = i->second; + std::string channel = tag->getString("channel"); + std::string topic = tag->getString("topic"); + std::string modes = tag->getString("modes"); if (channel.empty()) { - ServerInstance->Logs->Log("blah", DEBUG, "Malformed permchannels tag with empty channel name."); + ServerInstance->Logs->Log("m_permchannels", LOG_DEBUG, "Malformed permchannels tag with empty channel name."); continue; } @@ -123,10 +194,10 @@ public: if (!c) { - c = new Channel(ServerInstance, channel, ServerInstance->Time()); + c = new Channel(channel, ServerInstance->Time()); if (!topic.empty()) { - c->SetTopic(NULL, topic, true); + c->SetTopic(ServerInstance->FakeClient, topic, true); /* * Due to the way protocol works in 1.2, we need to hack the topic TS in such a way that this @@ -136,7 +207,7 @@ public: */ c->topicset = 42; } - ServerInstance->Logs->Log("blah", DEBUG, "Added %s with topic %s", channel.c_str(), topic.c_str()); + ServerInstance->Logs->Log("m_permchannels", LOG_DEBUG, "Added %s with topic %s", channel.c_str(), topic.c_str()); if (modes.empty()) continue; @@ -165,17 +236,70 @@ public: } } - virtual Version GetVersion() + ModResult OnRawMode(User* user, Channel* chan, const char mode, const std::string ¶m, bool adding, int pcnt) CXX11_OVERRIDE + { + if (chan && (chan->IsModeSet('P') || mode == 'P')) + dirty = true; + + return MOD_RES_PASSTHRU; + } + + void OnPostTopicChange(User*, Channel *c, const std::string&) CXX11_OVERRIDE + { + if (c->IsModeSet('P')) + dirty = true; + } + + void OnBackgroundTimer(time_t) CXX11_OVERRIDE + { + if (dirty) + WriteDatabase(); + dirty = false; + } + + void Prioritize() + { + // XXX: Load the DB here because the order in which modules are init()ed at boot is + // alphabetical, this means we must wait until all modules have done their init() + // to be able to set the modes they provide (e.g.: m_stripcolor is inited after us) + // Prioritize() is called after all module initialization is complete, consequently + // all modes are available now + + static bool loaded = false; + if (loaded) + return; + + loaded = true; + + // Load only when there are no linked servers - we set the TS of the channels we + // create to the current time, this can lead to desync because spanningtree has + // no way of knowing what we do + ProtoServerList serverlist; + ServerInstance->PI->GetServerList(serverlist); + if (serverlist.size() < 2) + { + try + { + LoadDatabase(); + } + catch (CoreException& e) + { + ServerInstance->Logs->Log("m_permchannels", LOG_DEFAULT, "Error loading permchannels database: " + std::string(e.GetReason())); + } + } + } + + Version GetVersion() CXX11_OVERRIDE { - return Version("$Id$",VF_COMMON|VF_VENDOR,API_VERSION); + return Version("Provides support for channel mode +P to provide permanent channels",VF_VENDOR); } - virtual int OnChannelPreDelete(Channel *c) + ModResult OnChannelPreDelete(Channel *c) CXX11_OVERRIDE { if (c->IsModeSet('P')) - return 1; + return MOD_RES_DENY; - return 0; + return MOD_RES_PASSTHRU; } };