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/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2007 InspIRCd Development Team
* See: http://www.inspircd.org/wiki/index.php/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#include "inspircd.h"
#include "users.h"
#include "channels.h"
#include "modules.h"
#include "hashcomp.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 classbase
{
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;
public:
ModuleBlockAmsg(InspIRCd* Me)
: Module(Me)
{
this->OnRehash(NULL,"");
}
void Implements(char* List)
{
List[I_OnRehash] = List[I_OnPreCommand] = List[I_OnCleanup] = 1;
}
virtual ~ModuleBlockAmsg()
{
}
virtual Version GetVersion()
{
return Version(1,1,0,0,VF_VENDOR,API_VERSION);
}
virtual void OnRehash(userrec* user, const std::string ¶meter)
{
ConfigReader Conf(ServerInstance);
ForgetDelay = Conf.ReadInteger("blockamsg", "delay", 0, false);
if(Conf.GetError() == CONF_VALUE_NOT_FOUND)
ForgetDelay = -1;
std::string act = Conf.ReadValue("blockamsg", "action", 0);
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 int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
{
// Don't do anything with unregistered users, or remote ones.
if(!user || (user->registered != REG_ALL) || !IS_LOCAL(user))
return 0;
// We want case insensitive command comparison.
// Add std::string contructor for irc::string :x
irc::string cmd = command.c_str();
if(validated && (cmd == "PRIVMSG" || cmd == "NOTICE") && (pcnt >= 2))
{
// 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] != '#')
{
// Decrement if the first target wasn't a channel.
targets--;
}
for(const char* c = parameters[0]; *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 0;
}
userchans = user->chans.size();
// Check that this message wasn't already sent within a few seconds.
BlockedMessage* m;
user->GetExt("amsgblock", m);
// 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->WriteOpers("*** %s had an /amsg or /ame denied", user->nick);
if(action == IBLOCK_KILL || action == IBLOCK_KILLOPERS)
userrec::QuitUser(ServerInstance, user, "Global message (/amsg or /ame) detected");
else if(action == IBLOCK_NOTICE || action == IBLOCK_NOTICEOPERS)
user->WriteServ( "NOTICE %s :Global message (/amsg or /ame) detected", user->nick);
return 1;
}
if(m)
{
// If there's already a BlockedMessage allocated, use it.
m->message = parameters[1];
m->target = parameters[0];
m->sent = ServerInstance->Time();
}
else
{
m = new BlockedMessage(parameters[1], parameters[0], ServerInstance->Time());
user->Extend("amsgblock", (char*)m);
}
}
return 0;
}
void OnCleanup(int target_type, void* item)
{
if(target_type == TYPE_USER)
{
userrec* user = (userrec*)item;
BlockedMessage* m;
user->GetExt("amsgblock", m);
if(m)
{
DELETE(m);
user->Shrink("amsgblock");
}
}
}
};
MODULE_INIT(ModuleBlockAmsg)
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