X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fmodules%2Fm_permchannels.cpp;h=a19a184e08bb91d4cdfd05c15581ce99e7815e91;hb=1031f333332cf1b09db4fd632f141143ee637c34;hp=08a48443e0160817fea14af89b0b2a1f9bb77a68;hpb=2630a87bb13b089e6d0fdcff4bcd0f3a9612e52f;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/modules/m_permchannels.cpp b/src/modules/m_permchannels.cpp index 08a48443e..a19a184e0 100644 --- a/src/modules/m_permchannels.cpp +++ b/src/modules/m_permchannels.cpp @@ -1,116 +1,227 @@ -/* +------------------------------------+ - * | 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 "listmode.h" +#include -/* $ModDesc: Provides support for channel mode +P to provide permanent channels */ +struct ListModeData +{ + std::string modes; + std::string params; +}; /** 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& parameter, 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()); + if (adding == channel->IsModeSet(this)) return MODEACTION_DENY; - } - if (adding) - { - if (!channel->IsModeSet('P')) - { - channel->SetMode('P',true); - return MODEACTION_ALLOW; - } - } - else + channel->SetMode(this, adding); + if (!adding) + channel->CheckDestroy(); + + return MODEACTION_ALLOW; + } +}; + +// Not in a class due to circular dependancy hell. +static std::string permchannelsconf; +static bool WriteDatabase(PermChannel& permchanmode, Module* mod, bool save_listmodes) +{ + ChanModeReference ban(mod, "ban"); + /* + * 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(MODNAME, LOG_DEFAULT, "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(permchanmode)) + continue; + + std::string chanmodes = chan->ChanModes(true); + if (save_listmodes) { - if (channel->IsModeSet('P')) + ListModeData lm; + + // Bans are managed by the core, so we have to process them separately + static_cast(*ban)->DoSyncChannel(chan, mod, &lm); + + // All other listmodes are managed by modules, so we need to ask them (call their + // OnSyncChannel() handler) to give our ProtoSendMode() a list of modes that are + // set on the channel. The ListModeData struct is passed as an opaque pointer + // that will be passed back to us by the module handling the mode. + FOREACH_MOD(OnSyncChannel, (chan, mod, &lm)); + + if (!lm.modes.empty()) { - 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; - } + // Remove the last space + lm.params.erase(lm.params.end()-1); + + // If there is at least a space in chanmodes (that is, a non-listmode has a parameter) + // insert the listmode mode letters before the space. Otherwise just append them. + std::string::size_type p = chanmodes.find(' '); + if (p == std::string::npos) + chanmodes += lm.modes; + else + chanmodes.insert(p, lm.modes); - /* for servers, remove +P (to avoid desyncs) but don't bother trying to delete. */ - channel->SetMode('P',false); - return MODEACTION_ALLOW; + // Append the listmode parameters (the masks themselves) + chanmodes += ' '; + chanmodes += lm.params; } } - return MODEACTION_DENY; + stream << "name) + << "\" ts=\"" << chan->age + << "\" topic=\"" << ServerConfig::Escape(chan->topic) + << "\" topicts=\"" << chan->topicset + << "\" topicsetby=\"" << ServerConfig::Escape(chan->setby) + << "\" modes=\"" << ServerConfig::Escape(chanmodes) + << "\">" << std::endl; } -}; + + if (stream.fail()) + { + ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "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(MODNAME, LOG_DEFAULT, "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(MODNAME, LOG_DEFAULT, "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; +} class ModulePermanentChannels : public Module { PermChannel p; + bool dirty; + bool save_listmodes; public: - ModulePermanentChannels(InspIRCd* Me) : Module(Me), p(Me) + ModulePermanentChannels() : p(this), dirty(false) + { + } + + void init() CXX11_OVERRIDE { - if (!ServerInstance->Modes->AddMode(&p)) - throw ModuleException("Could not add new modes!"); - Implementation eventlist[] = { I_OnChannelPreDelete }; - ServerInstance->Modules->Attach(eventlist, this, 1); + ServerInstance->Modules->AddService(p); 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(OnChannelDelete, (c)); + ServerInstance->chanlist->erase(at); + ServerInstance->GlobalCulls.AddItem(c); + } + else + iter++; + } ServerInstance->Modes->DelMode(&p); + return Module::cull(); } - virtual void OnRehash(User *user) + void OnRehash(User *user) CXX11_OVERRIDE + { + ConfigTag* tag = ServerInstance->Config->ConfValue("permchanneldb"); + permchannelsconf = tag->getString("filename"); + save_listmodes = tag->getBool("listmodes"); + } + + 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 modes = tag->getString("modes"); - if (channel.empty()) + if ((channel.empty()) || (channel.length() > ServerInstance->Config->Limits.ChanMax)) { - ServerInstance->Logs->Log("blah", DEBUG, "Malformed permchannels tag with empty channel name."); + ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Ignoring permchannels tag with empty or too long channel name (\"" + channel + "\")"); continue; } @@ -118,20 +229,23 @@ public: if (!c) { - c = new Channel(ServerInstance, channel, ServerInstance->Time()); - if (!topic.empty()) + time_t TS = tag->getInt("ts", ServerInstance->Time(), 1); + c = new Channel(channel, TS); + + unsigned int topicset = tag->getInt("topicts"); + c->topic = tag->getString("topic"); + + if ((topicset != 0) || (!c->topic.empty())) { - c->SetTopic(NULL, topic, true); - - /* - * Due to the way protocol works in 1.2, we need to hack the topic TS in such a way that this - * topic will always win over others. - * - * This is scheduled for (proper) fixing in a later release, and can be removed at a later date. - */ - c->topicset = 42; + if (topicset == 0) + topicset = ServerInstance->Time(); + c->topicset = topicset; + c->setby = tag->getString("topicsetby"); + if (c->setby.empty()) + c->setby = ServerInstance->Config->ServerName; } - ServerInstance->Logs->Log("blah", DEBUG, "Added %s with topic %s", channel.c_str(), topic.c_str()); + + ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "Added %s with topic %s", channel.c_str(), c->topic.c_str()); if (modes.empty()) continue; @@ -160,17 +274,89 @@ 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.GetModeChar())) + 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(p, this, save_listmodes); + 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 + ProtocolInterface::ServerList serverlist; + ServerInstance->PI->GetServerList(serverlist); + if (serverlist.size() < 2) + { + try + { + LoadDatabase(); + } + catch (CoreException& e) + { + ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Error loading permchannels database: " + std::string(e.GetReason())); + } + } + } + + void ProtoSendMode(void* opaque, TargetTypeFlags type, void* target, const std::vector& modes, const std::vector& translate) + { + // We never pass an empty modelist but better be sure + if (modes.empty()) + return; + + ListModeData* lm = static_cast(opaque); + + // Append the mode letters without the trailing '+' (for example "IIII", "gg") + lm->modes.append(modes[0].begin()+1, modes[0].end()); + + // Append the parameters + for (std::vector::const_iterator i = modes.begin()+1; i != modes.end(); ++i) + { + lm->params += *i; + lm->params += ' '; + } + } + + 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; + if (c->IsModeSet(p)) + return MOD_RES_DENY; - return 0; + return MOD_RES_PASSTHRU; } };