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