ModResult AccessCheck(User* source, Channel* channel, std::string ¶meter, bool adding)
{
std::string::size_type pos = parameter.find(':');
if (pos == 0 || pos == std::string::npos)
return adding ? MOD_RES_DENY : MOD_RES_PASSTHRU;
unsigned int mylevel = channel->GetPrefixValue(source);
std::string mid = parameter.substr(0, pos);
ModeHandler* mh = FindMode(mid);
if (adding && (!mh || !mh->GetPrefixRank()))
{
source->WriteNumeric(415, "%s %s :Cannot find prefix mode '%s' for autoop",
source->nick.c_str(), mid.c_str(), mid.c_str());
return MOD_RES_DENY;
}
else if (!mh)
return MOD_RES_PASSTHRU;
std::string dummy;
if (mh->AccessCheck(source, channel, dummy, true) == MOD_RES_DENY)
return MOD_RES_DENY;
if (mh->GetLevelRequired() > mylevel)
{
source->WriteNumeric(482, "%s %s :You must be able to set mode '%s' to include it in an autoop",
source->nick.c_str(), channel->name.c_str(), mid.c_str());
return MOD_RES_DENY;
}
return MOD_RES_PASSTHRU;
}
ModeAction ModeParser::TryMode(User* user, User* targetuser, Channel* chan, bool adding, const unsigned char modechar,
std::string ¶meter, bool SkipACL)
{
ModeType type = chan ? MODETYPE_CHANNEL : MODETYPE_USER;
ModeHandler *mh = FindMode(modechar, type);
int pcnt = mh->GetNumParams(adding);
// crop mode parameter size to 250 characters
if (parameter.length() > 250 && adding)
parameter = parameter.substr(0, 250);
ModResult MOD_RESULT;
FIRST_MOD_RESULT(OnRawMode, MOD_RESULT, (user, chan, modechar, parameter, adding, pcnt));
if (IS_LOCAL(user) && (MOD_RESULT == MOD_RES_DENY))
return MODEACTION_DENY;
if (chan && !SkipACL && (MOD_RESULT != MOD_RES_ALLOW))
{
MOD_RESULT = mh->AccessCheck(user, chan, parameter, adding);
if (MOD_RESULT == MOD_RES_DENY)
return MODEACTION_DENY;
if (MOD_RESULT == MOD_RES_PASSTHRU)
{
unsigned int neededrank = mh->GetLevelRequired();
/* Compare our rank on the channel against the rank of the required prefix,
* allow if >= ours. Because mIRC and xchat throw a tizz if the modes shown
* in NAMES(X) are not in rank order, we know the most powerful mode is listed
* first, so we don't need to iterate, we just look up the first instead.
*/
unsigned int ourrank = chan->GetPrefixValue(user);
if (ourrank < neededrank)
{
PrefixMode* neededmh = NULL;
for(char c='A'; c <= 'z'; c++)
{
PrefixMode* privmh = FindPrefixMode(c);
if (privmh && privmh->GetPrefixRank() >= neededrank)
{
// this mode is sufficient to allow this action
if (!neededmh || privmh->GetPrefixRank() < neededmh->GetPrefixRank())
neededmh = privmh;
}
}
if (neededmh)
user->WriteNumeric(ERR_CHANOPRIVSNEEDED, "%s %s :You must have channel %s access or above to %sset channel mode %c",
user->nick.c_str(), chan->name.c_str(), neededmh->name.c_str(), adding ? "" : "un", modechar);
else
user->WriteNumeric(ERR_CHANOPRIVSNEEDED, "%s %s :You cannot %sset channel mode %c",
user->nick.c_str(), chan->name.c_str(), adding ? "" : "un", modechar);
return MODEACTION_DENY;
}
}
}
// Ask mode watchers whether this mode change is OK
std::pair<ModeWatchIter, ModeWatchIter> itpair = modewatchermap.equal_range(mh->name);
for (ModeWatchIter i = itpair.first; i != itpair.second; ++i)
{
ModeWatcher* mw = i->second;
if (mw->GetModeType() == type)
{
if (!mw->BeforeMode(user, targetuser, chan, parameter, adding))
return MODEACTION_DENY;
// A module whacked the parameter completely, and there was one. Abort.
if (pcnt && parameter.empty())
return MODEACTION_DENY;
}
}
if (IS_LOCAL(user) && !user->IsOper())
{
char* disabled = (type == MODETYPE_CHANNEL) ? ServerInstance->Config->DisabledCModes : ServerInstance->Config->DisabledUModes;
if (disabled[modechar - 'A'])
{
user->WriteNumeric(ERR_NOPRIVILEGES, "%s :Permission Denied - %s mode %c has been locked by the administrator",
user->nick.c_str(), type == MODETYPE_CHANNEL ? "channel" : "user", modechar);
return MODEACTION_DENY;
}
}
if (adding && IS_LOCAL(user) && mh->NeedsOper() && !user->HasModePermission(modechar, type))
{
/* It's an oper only mode, and they don't have access to it. */
if (user->IsOper())
{
user->WriteNumeric(ERR_NOPRIVILEGES, "%s :Permission Denied - Oper type %s does not have access to set %s mode %c",
user->nick.c_str(), user->oper->name.c_str(), type == MODETYPE_CHANNEL ? "channel" : "user", modechar);
}
else
{
user->WriteNumeric(ERR_NOPRIVILEGES, "%s :Permission Denied - Only operators may set %s mode %c",
user->nick.c_str(), type == MODETYPE_CHANNEL ? "channel" : "user", modechar);
}
return MODEACTION_DENY;
}
/* Call the handler for the mode */
ModeAction ma = mh->OnModeChange(user, targetuser, chan, parameter, adding);
if (pcnt && parameter.empty())
return MODEACTION_DENY;
if (ma != MODEACTION_ALLOW)
return ma;
if ((!mh->IsListMode()) && (mh->GetNumParams(true)) && (chan))
chan->SetModeParam(mh, (adding ? parameter : ""));
itpair = modewatchermap.equal_range(mh->name);
for (ModeWatchIter i = itpair.first; i != itpair.second; ++i)
{
ModeWatcher* mw = i->second;
if (mw->GetModeType() == type)
mw->AfterMode(user, targetuser, chan, parameter, adding);
}
return MODEACTION_ALLOW;
}