/* +------------------------------------+ * | Inspire Internet Relay Chat Daemon | * +------------------------------------+ * * 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. * * --------------------------------------------------- */ #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 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) { ConfigReader Conf; 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 ModResult OnPreCommand(std::string &command, std::vector ¶meters, User *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 MOD_RES_PASSTHRU; // 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") && (parameters.size() >= 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].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)