src/modules/m_blockamsg.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *                                              <omster@gmail.com>
  10  *
  11  * Written by Craig Edwards, Craig McLure, and others.
  12  * This program is free but copyrighted software; see
  13  *            the file COPYING for details.
  14  *
  15  * ---------------------------------------------------
  16  */
  17
  18 /* <3's to Lauren for original info on mIRC's weird behaviour */
  19
  20 #include <string>
  21 #include <time.h>
  22 #include "inspircd_config.h"
  23 #include "users.h"
  24 #include "channels.h"
  25 #include "modules.h"
  26 #include "helperfuncs.h"
  27 #include "hashcomp.h"
  28 #include "inspircd.h"
  29
  30 /* $ModDesc: Attempt to block /amsg, at least some of the irritating mIRC scripts. */
  31
  32 extern time_t TIME;
  33 extern InspIRCd* ServerInstance;
  34
  35 enum BlockAction { IBLOCK_KILL, IBLOCK_KILLOPERS, IBLOCK_NOTICE, IBLOCK_NOTICEOPERS, IBLOCK_SILENT };
  36
  37 class BlockedMessage : public classbase
  38 {
  39 public:
  40         std::string message;
  41         irc::string target;
  42         time_t sent;
  43
  44         BlockedMessage(std::string msg, irc::string tgt, time_t when) : message(msg), target(tgt), sent(when)
  45         {
  46         }
  47 };
  48
  49 class ModuleBlockAmsg : public Module
  50 {
  51
  52         int ForgetDelay;
  53         BlockAction action;
  54 public:
  55         ModuleBlockAmsg(InspIRCd* Me) : Module::Module(Me)
  56         {
  57
  58                 this->OnRehash("");
  59         }
  60
  61         void Implements(char* List)
  62         {
  63                 List[I_OnRehash] = List[I_OnPreCommand] = List[I_OnCleanup] = 1;
  64         }
  65
  66         virtual ~ModuleBlockAmsg()
  67         {
  68         }
  69
  70         virtual Version GetVersion()
  71         {
  72                 return Version(1,0,0,0,VF_VENDOR);
  73         }
  74
  75         virtual void OnRehash(const std::string &parameter)
  76         {
  77                 ConfigReader* Conf = new ConfigReader;
  78
  79                 ForgetDelay = Conf->ReadInteger("blockamsg", "delay", 0, false);
  80                 if(Conf->GetError() == CONF_VALUE_NOT_FOUND)
  81                         ForgetDelay = -1;
  82
  83                 std::string act = Conf->ReadValue("blockamsg", "action", 0);
  84
  85                 if(act == "notice")
  86                         action = IBLOCK_NOTICE;
  87                 else if(act == "noticeopers")
  88                         action = IBLOCK_NOTICEOPERS;
  89                 else if(act == "silent")
  90                         action = IBLOCK_SILENT;
  91                 else if(act == "kill")
  92                         action = IBLOCK_KILL;
  93                 else
  94                         action = IBLOCK_KILLOPERS;
  95
  96                 DELETE(Conf);
  97         }
  98
  99         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated)
 100         {
 101                 // Don't do anything with unregistered users, or remote ones.
 102                 if(!user || (user->registered != REG_ALL) || !IS_LOCAL(user))
 103                         return 0;
 104
 105                 // We want case insensitive command comparison.
 106                 // Add std::string contructor for irc::string :x
 107                 irc::string cmd = command.c_str();
 108
 109                 if(validated && (cmd == "PRIVMSG" || cmd == "NOTICE") && (pcnt >= 2))
 110                 {
 111                         // parameters[0] should have the target(s) in it.
 112                         // I think it will be faster to first check if there are any commas, and if there are then try and parse it out.
 113                         // Most messages have a single target so...
 114
 115                         int targets = 1;
 116                         int userchans = 0;
 117
 118                         // Decrement if the first target wasn't a channel.
 119                         if(*parameters[0] != '#')
 120                                 targets--;
 121
 122                         for(const char* c = parameters[0]; *c; c++)
 123                                 if((*c == ',') && *(c+1) && (*(c+1) == '#'))
 124                                         targets++;
 125
 126                         for(std::vector<ucrec*>::iterator f = user->chans.begin(); f != user->chans.end(); f++)
 127                                 if(((ucrec*)(*f))->channel)
 128                                         userchans++;
 129
 130                         // Check that this message wasn't already sent within a few seconds.
 131                         BlockedMessage* m;
 132                         user->GetExt("amsgblock", m);
 133
 134                         // If the message is identical and within the time.
 135                         // We check the target is *not* identical, that'd straying into the realms of flood control. Which isn't what we're doing...
 136                         // OR
 137                         // The number of target channels is equal to the number of channels the sender is on..a little suspicious.
 138                         // Check it's more than 1 too, or else users on one channel would have fun.
 139                         if((m && (m->message == parameters[1]) && (m->target != parameters[0]) && (ForgetDelay != -1) && (m->sent >= TIME-ForgetDelay)) || ((targets > 1) && (targets == userchans)))
 140                         {
 141                                 // Block it...
 142                                 if(action == IBLOCK_KILLOPERS || action == IBLOCK_NOTICEOPERS)
 143                                         ServerInstance->WriteOpers("*** %s had an /amsg or /ame denied", user->nick);
 144
 145                                 if(action == IBLOCK_KILL || action == IBLOCK_KILLOPERS)
 146                                         userrec::QuitUser(ServerInstance, user, "Global message (/amsg or /ame) detected");
 147                                 else if(action == IBLOCK_NOTICE || action == IBLOCK_NOTICEOPERS)
 148                                         user->WriteServ( "NOTICE %s :Global message (/amsg or /ame) detected", user->nick);
 149
 150                                 return 1;
 151                         }
 152
 153                         if(m)
 154                         {
 155                                 // If there's already a BlockedMessage allocated, use it.
 156                                 m->message = parameters[1];
 157                                 m->target = parameters[0];
 158                                 m->sent = TIME;
 159                         }
 160                         else
 161                         {
 162                                 m = new BlockedMessage(parameters[1], parameters[0], TIME);
 163                                 user->Extend("amsgblock", (char*)m);
 164                         }
 165                 }
 166                 return 0;
 167         }
 168
 169         void OnCleanup(int target_type, void* item)
 170         {
 171                 if(target_type == TYPE_USER)
 172                 {
 173                         userrec* user = (userrec*)item;
 174                         BlockedMessage* m;
 175                         user->GetExt("amsgblock", m);
 176                         if(m)
 177                         {
 178                                 DELETE(m);
 179                                 user->Shrink("amsgblock");
 180                         }
 181                 }
 182         }
 183 };
 184
 185
 186 class ModuleBlockAmsgFactory : public ModuleFactory
 187 {
 188         public:
 189                 ModuleBlockAmsgFactory()
 190                 {
 191                 }
 192
 193                 ~ModuleBlockAmsgFactory()
 194                 {
 195                 }
 196
 197                 virtual Module * CreateModule(InspIRCd* Me)
 198                 {
 199                         return new ModuleBlockAmsg(Me);
 200                 }
 201 };
 202
 203
 204 extern "C" void * init_module( void )
 205 {
 206         return new ModuleBlockAmsgFactory;
 207 }