src/modules/m_blockamsg.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include <string>
  15 #include <time.h>
  16 #include "inspircd_config.h"
  17 #include "users.h"
  18 #include "channels.h"
  19 #include "modules.h"
  20
  21 #include "hashcomp.h"
  22 #include "inspircd.h"
  23
  24 /* $ModDesc: Attempt to block /amsg, at least some of the irritating mIRC scripts. */
  25
  26 enum BlockAction { IBLOCK_KILL, IBLOCK_KILLOPERS, IBLOCK_NOTICE, IBLOCK_NOTICEOPERS, IBLOCK_SILENT };
  27
  28 /** Holds a blocked message's details
  29  */
  30 class BlockedMessage : public classbase
  31 {
  32 public:
  33         std::string message;
  34         irc::string target;
  35         time_t sent;
  36
  37         BlockedMessage(const std::string &msg, const irc::string &tgt, time_t when) : message(msg), target(tgt), sent(when)
  38         {
  39         }
  40 };
  41
  42 class ModuleBlockAmsg : public Module
  43 {
  44
  45         int ForgetDelay;
  46         BlockAction action;
  47 public:
  48         ModuleBlockAmsg(InspIRCd* Me) : Module::Module(Me)
  49         {
  50
  51                 this->OnRehash(NULL,"");
  52         }
  53
  54         void Implements(char* List)
  55         {
  56                 List[I_OnRehash] = List[I_OnPreCommand] = List[I_OnCleanup] = 1;
  57         }
  58
  59         virtual ~ModuleBlockAmsg()
  60         {
  61         }
  62
  63         virtual Version GetVersion()
  64         {
  65                 return Version(1,1,0,0,VF_VENDOR,API_VERSION);
  66         }
  67
  68         virtual void OnRehash(userrec* user, const std::string &parameter)
  69         {
  70                 ConfigReader* Conf = new ConfigReader(ServerInstance);
  71
  72                 ForgetDelay = Conf->ReadInteger("blockamsg", "delay", 0, false);
  73                 if(Conf->GetError() == CONF_VALUE_NOT_FOUND)
  74                         ForgetDelay = -1;
  75
  76                 std::string act = Conf->ReadValue("blockamsg", "action", 0);
  77
  78                 if(act == "notice")
  79                         action = IBLOCK_NOTICE;
  80                 else if(act == "noticeopers")
  81                         action = IBLOCK_NOTICEOPERS;
  82                 else if(act == "silent")
  83                         action = IBLOCK_SILENT;
  84                 else if(act == "kill")
  85                         action = IBLOCK_KILL;
  86                 else
  87                         action = IBLOCK_KILLOPERS;
  88
  89                 DELETE(Conf);
  90         }
  91
  92         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
  93         {
  94                 // Don't do anything with unregistered users, or remote ones.
  95                 if(!user || (user->registered != REG_ALL) || !IS_LOCAL(user))
  96                         return 0;
  97
  98                 // We want case insensitive command comparison.
  99                 // Add std::string contructor for irc::string :x
 100                 irc::string cmd = command.c_str();
 101
 102                 if(validated && (cmd == "PRIVMSG" || cmd == "NOTICE") && (pcnt >= 2))
 103                 {
 104                         // parameters[0] should have the target(s) in it.
 105                         // I think it will be faster to first check if there are any commas, and if there are then try and parse it out.
 106                         // Most messages have a single target so...
 107
 108                         int targets = 1;
 109                         int userchans = 0;
 110
 111                         // Decrement if the first target wasn't a channel.
 112                         if(*parameters[0] != '#')
 113                                 targets--;
 114
 115                         for(const char* c = parameters[0]; *c; c++)
 116                                 if((*c == ',') && *(c+1) && (*(c+1) == '#'))
 117                                         targets++;
 118
 119                         userchans = user->chans.size();
 120
 121                         // Check that this message wasn't already sent within a few seconds.
 122                         BlockedMessage* m;
 123                         user->GetExt("amsgblock", m);
 124
 125                         // If the message is identical and within the time.
 126                         // We check the target is *not* identical, that'd straying into the realms of flood control. Which isn't what we're doing...
 127                         // OR
 128                         // The number of target channels is equal to the number of channels the sender is on..a little suspicious.
 129                         // Check it's more than 1 too, or else users on one channel would have fun.
 130                         if((m && (m->message == parameters[1]) && (m->target != parameters[0]) && (ForgetDelay != -1) && (m->sent >= ServerInstance->Time()-ForgetDelay)) || ((targets > 1) && (targets == userchans)))
 131                         {
 132                                 // Block it...
 133                                 if(action == IBLOCK_KILLOPERS || action == IBLOCK_NOTICEOPERS)
 134                                         ServerInstance->WriteOpers("*** %s had an /amsg or /ame denied", user->nick);
 135
 136                                 if(action == IBLOCK_KILL || action == IBLOCK_KILLOPERS)
 137                                         userrec::QuitUser(ServerInstance, user, "Global message (/amsg or /ame) detected");
 138                                 else if(action == IBLOCK_NOTICE || action == IBLOCK_NOTICEOPERS)
 139                                         user->WriteServ( "NOTICE %s :Global message (/amsg or /ame) detected", user->nick);
 140
 141                                 return 1;
 142                         }
 143
 144                         if(m)
 145                         {
 146                                 // If there's already a BlockedMessage allocated, use it.
 147                                 m->message = parameters[1];
 148                                 m->target = parameters[0];
 149                                 m->sent = ServerInstance->Time();
 150                         }
 151                         else
 152                         {
 153                                 m = new BlockedMessage(parameters[1], parameters[0], ServerInstance->Time());
 154                                 user->Extend("amsgblock", (char*)m);
 155                         }
 156                 }
 157                 return 0;
 158         }
 159
 160         void OnCleanup(int target_type, void* item)
 161         {
 162                 if(target_type == TYPE_USER)
 163                 {
 164                         userrec* user = (userrec*)item;
 165                         BlockedMessage* m;
 166                         user->GetExt("amsgblock", m);
 167                         if(m)
 168                         {
 169                                 DELETE(m);
 170                                 user->Shrink("amsgblock");
 171                         }
 172                 }
 173         }
 174 };
 175
 176
 177 class ModuleBlockAmsgFactory : public ModuleFactory
 178 {
 179         public:
 180                 ModuleBlockAmsgFactory()
 181                 {
 182                 }
 183
 184                 ~ModuleBlockAmsgFactory()
 185                 {
 186                 }
 187
 188                 virtual Module * CreateModule(InspIRCd* Me)
 189                 {
 190                         return new ModuleBlockAmsg(Me);
 191                 }
 192 };
 193
 194
 195 extern "C" void * init_module( void )
 196 {
 197         return new ModuleBlockAmsgFactory;
 198 }