* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
- * InspIRCd: (C) 2002-2008 InspIRCd Development Team
- * See: http://www.inspircd.org/wiki/index.php/Credits
+ * InspIRCd: (C) 2002-2009 InspIRCd Development Team
+ * See: http://wiki.inspircd.org/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
/* $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()
+{
+ FILE *f;
+
+ if (permchannelsconf.empty())
+ {
+ // Fake success.
+ return true;
+ }
+
+ std::string tempname = permchannelsconf + ".tmp";
+
+ /*
+ * We need to perform an atomic write so as not to fuck things up.
+ * So, let's write to a temporary file, flush and sync the FD, then rename the file..
+ * -- w00t
+ */
+ f = fopen(tempname.c_str(), "w");
+ if (!f)
+ {
+ ServerInstance->Logs->Log("m_permchannels",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;
+ }
+
+ // Now, let's write.
+ for (chan_hash::const_iterator i = ServerInstance->chanlist->begin(); i != ServerInstance->chanlist->end(); i++)
+ {
+ Channel* chan = i->second;
+ if (!chan->IsModeSet('P'))
+ continue;
+
+ char line[1024];
+ const char* items[] =
+ {
+ "<permchannels channel=",
+ chan->name.c_str(),
+ " topic=",
+ chan->topic.c_str(),
+ " modes=",
+ chan->ChanModes(true),
+ ">\n"
+ };
+
+ int lpos = 0, item = 0, ipos = 0;
+ while (lpos < 1022 && item < 7)
+ {
+ char c = items[item][ipos++];
+ if (c == 0)
+ {
+ // end of this string; hop to next string, insert a quote
+ item++;
+ ipos = 0;
+ c = '"';
+ }
+ else if (c == '\\' || c == '"')
+ {
+ line[lpos++] = '\\';
+ }
+ line[lpos++] = c;
+ }
+ line[--lpos] = 0;
+ fputs(line, f);
+ }
+
+ int write_error = 0;
+ write_error = ferror(f);
+ write_error |= fclose(f);
+ if (write_error)
+ {
+ ServerInstance->Logs->Log("m_permchannels",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;
+ }
+
+ // Use rename to move temporary to new db - this is guarenteed not to fuck up, even in case of a crash.
+ if (rename(tempname.c_str(), permchannelsconf.c_str()) < 0)
+ {
+ ServerInstance->Logs->Log("m_permchannels",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, 'P', PARAM_NONE, MODETYPE_CHANNEL) { }
- ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding, bool)
+ 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'))
{
channel->SetMode('P',true);
+
+ // Save permchannels db if needed.
+ WriteDatabase();
return MODEACTION_ALLOW;
}
}
{
if (channel->IsModeSet('P'))
{
+ if (channel->GetUserCounter() == 0 && !IS_FAKE(source))
+ {
+ /*
+ * 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);
+
+ // Save permchannels db if needed.
+ WriteDatabase();
return MODEACTION_ALLOW;
}
}
class ModulePermanentChannels : public Module
{
- PermChannel *p;
+ PermChannel p;
public:
- ModulePermanentChannels(InspIRCd* Me) : Module(Me)
+ ModulePermanentChannels() : p(this)
{
- p = new PermChannel(ServerInstance);
- if (!ServerInstance->Modes->AddMode(p))
- {
- delete p;
+ if (!ServerInstance->Modes->AddMode(&p))
throw ModuleException("Could not add new modes!");
- }
- Implementation eventlist[] = { I_OnChannelPreDelete };
- ServerInstance->Modules->Attach(eventlist, this, 1);
+ Implementation eventlist[] = { I_OnChannelPreDelete, I_OnPostTopicChange, I_OnRawMode };
+ ServerInstance->Modules->Attach(eventlist, this, 3);
+
+ OnRehash(NULL);
}
virtual ~ModulePermanentChannels()
{
- ServerInstance->Modes->DelMode(p);
- delete p;
+ ServerInstance->Modes->DelMode(&p);
+ /*
+ * 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++;
+ ServerInstance->chanlist->erase(at);
+ delete c;
+ }
+ else
+ iter++;
+ }
+ }
+
+ virtual void OnRehash(User *user)
+ {
+ /*
+ * Process config-defined list of permanent channels.
+ * -- w00t
+ */
+ ConfigReader MyConf;
+
+ permchannelsconf = MyConf.ReadValue("permchanneldb", "filename", "", 0, false);
+
+ for (int i = 0; i < MyConf.Enumerate("permchannels"); 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);
+
+ if (channel.empty())
+ {
+ ServerInstance->Logs->Log("blah", DEBUG, "Malformed permchannels tag with empty channel name.");
+ continue;
+ }
+
+ Channel *c = ServerInstance->FindChan(channel);
+
+ if (!c)
+ {
+ c = new Channel(channel, ServerInstance->Time());
+ if (!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;
+ }
+ ServerInstance->Logs->Log("blah", DEBUG, "Added %s with topic %s", channel.c_str(), topic.c_str());
+
+ if (modes.empty())
+ continue;
+
+ irc::spacesepstream list(modes);
+ std::string modeseq;
+ std::string par;
+
+ list.GetToken(modeseq);
+
+ // XXX bleh, should we pass this to the mode parser instead? ugly. --w00t
+ for (std::string::iterator n = modeseq.begin(); n != modeseq.end(); ++n)
+ {
+ ModeHandler* mode = ServerInstance->Modes->FindMode(*n, MODETYPE_CHANNEL);
+ if (mode)
+ {
+ if (mode->GetNumParams(true))
+ list.GetToken(par);
+ else
+ par.clear();
+
+ mode->OnModeChange(ServerInstance->FakeClient, ServerInstance->FakeClient, c, par, true);
+ }
+ }
+ }
+ }
+ }
+
+ virtual ModResult OnRawMode(User* user, Channel* chan, const char mode, const std::string ¶m, bool adding, int pcnt)
+ {
+ if (chan && chan->IsModeSet('P'))
+ WriteDatabase();
+
+ return MOD_RES_PASSTHRU;
+ }
+
+ virtual void OnPostTopicChange(User*, Channel *c, const std::string&)
+ {
+ if (c->IsModeSet('P'))
+ WriteDatabase();
}
virtual Version GetVersion()
{
- return Version(1,2,0,0,VF_COMMON|VF_VENDOR,API_VERSION);
+ return Version("Provides support for channel mode +P to provide permanent channels",VF_COMMON|VF_VENDOR,API_VERSION);
}
- virtual int OnChannelPreDelete(Channel *c)
+ virtual ModResult OnChannelPreDelete(Channel *c)
{
if (c->IsModeSet('P'))
- return 1;
+ return MOD_RES_DENY;
- return 0;
+ return MOD_RES_PASSTHRU;
}
};
projects / user / henk / code / inspircd.git / blobdiff