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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
* Copyright (C) 2008 Pippijn van Steenhoven <pip88nl@gmail.com>
* Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
* Copyright (C) 2007 Robin Burchell <robin+git@viroteck.net>
* Copyright (C) 2006-2007 Oliver Lupton <oliverlupton@gmail.com>
*
* 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 <http://www.gnu.org/licenses/>.
*/
#include "inspircd.h"
/* $ModDesc: Attempt to block /amsg, at least some of the irritating mIRC scripts. */
enum BlockAction { IBLOCK_KILL, IBLOCK_KILLOPERS, IBLOCK_NOTICE, IBLOCK_NOTICEOPERS, IBLOCK_SILENT };
/* IBLOCK_NOTICE - Send a notice to the user informing them of what happened.
* IBLOCK_NOTICEOPERS - Send a notice to the user informing them and send an oper notice.
* IBLOCK_SILENT - Generate no output, silently drop messages.
* IBLOCK_KILL - Kill the user with the reason "Global message (/amsg or /ame) detected".
* IBLOCK_KILLOPERS - As above, but send an oper notice as well. This is the default.
*/
/** Holds a blocked message's details
*/
class BlockedMessage
{
public:
std::string message;
irc::string target;
time_t sent;
BlockedMessage(const std::string &msg, const irc::string &tgt, time_t when)
: message(msg), target(tgt), sent(when)
{
}
};
class ModuleBlockAmsg : public Module
{
int ForgetDelay;
BlockAction action;
SimpleExtItem<BlockedMessage> blockamsg;
public:
ModuleBlockAmsg() : blockamsg("blockamsg", this)
{
this->OnRehash(NULL);
ServerInstance->Extensions.Register(&blockamsg);
Implementation eventlist[] = { I_OnRehash, I_OnPreCommand };
ServerInstance->Modules->Attach(eventlist, this, 2);
}
virtual ~ModuleBlockAmsg()
{
}
virtual Version GetVersion()
{
return Version("Attempt to block /amsg, at least some of the irritating mIRC scripts.",VF_VENDOR);
}
virtual void OnRehash(User* user)
{
ConfigTag* tag = ServerInstance->Config->ConfValue("blockamsg");
ForgetDelay = tag->getInt("delay", -1);
std::string act = tag->getString("action");
if(act == "notice")
action = IBLOCK_NOTICE;
else if(act == "noticeopers")
action = IBLOCK_NOTICEOPERS;
else if(act == "silent")
action = IBLOCK_SILENT;
else if(act == "kill")
action = IBLOCK_KILL;
else
action = IBLOCK_KILLOPERS;
}
virtual ModResult OnPreCommand(std::string &command, std::vector<std::string> ¶meters, LocalUser *user, bool validated, const std::string &original_line)
{
// Don't do anything with unregistered users
if (user->registered != REG_ALL)
return MOD_RES_PASSTHRU;
if ((validated) && (parameters.size() >= 2) && ((command == "PRIVMSG") || (command == "NOTICE")))
{
// parameters[0] should have the target(s) in it.
// I think it will be faster to first check if there are any commas, and if there are then try and parse it out.
// Most messages have a single target so...
int targets = 1;
int userchans = 0;
if(*parameters[0].c_str() != '#')
{
// Decrement if the first target wasn't a channel.
targets--;
}
for(const char* c = parameters[0].c_str(); *c; c++)
if((*c == ',') && *(c+1) && (*(c+1) == '#'))
targets++;
/* targets should now contain the number of channel targets the msg/notice was pointed at.
* If the msg/notice was a PM there should be no channel targets and 'targets' should = 0.
* We don't want to block PMs so...
*/
if(targets == 0)
{
return MOD_RES_PASSTHRU;
}
userchans = user->chans.size();
// Check that this message wasn't already sent within a few seconds.
BlockedMessage* m = blockamsg.get(user);
// If the message is identical and within the time.
// We check the target is *not* identical, that'd straying into the realms of flood control. Which isn't what we're doing...
// OR
// The number of target channels is equal to the number of channels the sender is on..a little suspicious.
// Check it's more than 1 too, or else users on one channel would have fun.
if((m && (m->message == parameters[1]) && (m->target != parameters[0]) && (ForgetDelay != -1) && (m->sent >= ServerInstance->Time()-ForgetDelay)) || ((targets > 1) && (targets == userchans)))
{
// Block it...
if(action == IBLOCK_KILLOPERS || action == IBLOCK_NOTICEOPERS)
ServerInstance->SNO->WriteToSnoMask('a', "%s had an /amsg or /ame denied", user->nick.c_str());
if(action == IBLOCK_KILL || action == IBLOCK_KILLOPERS)
ServerInstance->Users->QuitUser(user, "Attempted to global message (/amsg or /ame)");
else if(action == IBLOCK_NOTICE || action == IBLOCK_NOTICEOPERS)
user->WriteServ( "NOTICE %s :Global message (/amsg or /ame) denied", user->nick.c_str());
return MOD_RES_DENY;
}
if(m)
{
// If there's already a BlockedMessage allocated, use it.
m->message = parameters[1];
m->target = parameters[0].c_str();
m->sent = ServerInstance->Time();
}
else
{
m = new BlockedMessage(parameters[1], parameters[0].c_str(), ServerInstance->Time());
blockamsg.set(user, m);
}
}
return MOD_RES_PASSTHRU;
}
};
MODULE_INIT(ModuleBlockAmsg)
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