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