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-rw-r--r--src/modules/m_permchannels.cpp28
1 files changed, 24 insertions, 4 deletions
diff --git a/src/modules/m_permchannels.cpp b/src/modules/m_permchannels.cpp
index a333ea0b0..6a5373009 100644
--- a/src/modules/m_permchannels.cpp
+++ b/src/modules/m_permchannels.cpp
@@ -23,7 +23,7 @@ class PermChannel : public ModeHandler
public:
PermChannel(InspIRCd* Instance) : ModeHandler(Instance, 'P', 0, 0, false, MODETYPE_CHANNEL, false) { }
- ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string &parameter, bool adding, bool)
+ ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string &parameter, bool adding, bool sm)
{
if (adding)
{
@@ -37,10 +37,30 @@ class PermChannel : public ModeHandler
{
if (channel->IsModeSet('P'))
{
- channel->SetMode('P',false);
+ 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;
+ }
- if (channel->GetUserCounter() == 0)
- delete channel;
+ /* for servers, remove +P (to avoid desyncs) but don't bother trying to delete. */
+ channel->SetMode('P',false);
return MODEACTION_ALLOW;
}
}