src/modules/m_chanfilter.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  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 using namespace std;
  18
  19 #include <stdio.h>
  20 #include <string>
  21 #include <vector>
  22 #include "users.h"
  23 #include "channels.h"
  24 #include "modules.h"
  25 #include "helperfuncs.h"
  26 #include "hashcomp.h"
  27
  28 /* $ModDesc: Provides channel-specific censor lists (like mode +G but varies from channel to channel) */
  29
  30 typedef std::vector<irc::string> SpamList;
  31
  32 class ModuleChanFilter : public Module
  33 {
  34         Server *Srv;
  35         ConfigReader *Conf;
  36         long MaxEntries;
  37
  38  public:
  39
  40         ModuleChanFilter(Server* Me)
  41                 : Module::Module(Me)
  42         {
  43                 Srv = Me;
  44                 Conf = new ConfigReader;
  45                 Srv->AddExtendedListMode('g');
  46                 MaxEntries = Conf->ReadInteger("chanfilter","maxsize",0,true);
  47                 if (MaxEntries == 0)
  48                         MaxEntries = 32;
  49         }
  50
  51         void Implements(char* List)
  52         {
  53                 List[I_On005Numeric] = List[I_OnUserPart] = List[I_OnRehash] = List[I_OnUserPreMessage] = List[I_OnUserPreNotice] = List[I_OnExtendedMode] = List[I_OnSendList] = List[I_OnSyncChannel] = 1;
  54         }
  55
  56         virtual void On005Numeric(std::string &output)
  57         {
  58                 InsertMode(output,"g",1);
  59         }
  60
  61         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partreason)
  62         {
  63                 // when the last user parts, delete the list
  64                 if (Srv->CountUsers(channel) == 1)
  65                 {
  66                         SpamList* spamlist = (SpamList*)channel->GetExt("spam_list");
  67                         if (spamlist)
  68                         {
  69                                 channel->Shrink("spam_list");
  70                                 DELETE(spamlist);
  71                         }
  72                 }
  73         }
  74
  75         virtual void OnRehash(const std::string &parameter)
  76         {
  77                 DELETE(Conf);
  78                 Conf = new ConfigReader;
  79                 // re-read our config options on a rehash
  80                 MaxEntries = Conf->ReadInteger("chanfilter","maxsize",0,true);
  81         }
  82
  83         virtual int ProcessMessages(userrec* user,chanrec* chan,std::string &text)
  84         {
  85
  86                 // Create a copy of the string in irc::string
  87                 irc::string line = text.c_str();
  88
  89                 SpamList* spamlist = (SpamList*)chan->GetExt("spam_list");
  90                 if (spamlist)
  91                 {
  92                         for (SpamList::iterator i = spamlist->begin(); i != spamlist->end(); i++)
  93                         {
  94                                 if (line.find(*i) != std::string::npos)
  95                                 {
  96                                         WriteServ(user->fd,"936 %s %s %s :Your message contained a censored word, and was blocked",user->nick, chan->name, i->c_str());
  97                                         return 1;
  98                                 }
  99                         }
 100                 }
 101                 return 0;
 102         }
 103
 104         virtual int OnUserPreMessage(userrec* user,void* dest,int target_type, std::string &text, char status)
 105         {
 106                 if (target_type == TYPE_CHANNEL)
 107                 {
 108                         return ProcessMessages(user,(chanrec*)dest,text);
 109                 }
 110                 else return 0;
 111         }
 112
 113         virtual int OnUserPreNotice(userrec* user,void* dest,int target_type, std::string &text, char status)
 114         {
 115                 return OnUserPreMessage(user,dest,target_type,text,status);
 116         }
 117
 118         virtual int OnExtendedMode(userrec* user, void* target, char modechar, int type, bool mode_on, string_list &params)
 119         {
 120                 if ((modechar == 'g') && (type == MT_CHANNEL))
 121                 {
 122                         chanrec* chan = (chanrec*)target;
 123
 124                         irc::string word = params[0].c_str();
 125
 126                         if (word == "")
 127                                 return -1;
 128
 129                         if (mode_on)
 130                         {
 131                                 SpamList* spamlist = (SpamList*)chan->GetExt("spam_list");
 132                                 if (!spamlist)
 133                                 {
 134                                         spamlist = new SpamList;
 135                                         chan->Extend("spam_list",(char*)spamlist);
 136                                 }
 137                                 if (spamlist->size() < (unsigned)MaxEntries)
 138                                 {
 139                                         if (word.length() > 35)
 140                                         {
 141                                                 WriteServ(user->fd,"935 %s %s %s :word is too long for censor list",user->nick, chan->name,word.c_str());
 142                                                 return -1;
 143                                         }
 144                                         for (SpamList::iterator i = spamlist->begin(); i != spamlist->end(); i++)
 145                                         {
 146                                                 if (*i == word)
 147                                                 {
 148                                                         WriteServ(user->fd,"937 %s %s :The word %s is already on the spamfilter list",user->nick, chan->name,word.c_str());
 149                                                         return -1;
 150                                                 }
 151                                         }
 152                                         spamlist->push_back(word);
 153                                         return 1;
 154                                 }
 155                                 WriteServ(user->fd,"939 %s %s :Channel spamfilter list is full",user->nick, chan->name);
 156                                 return -1;
 157                         }
 158                         else
 159                         {
 160                                 SpamList* spamlist = (SpamList*)chan->GetExt("spam_list");
 161                                 if (spamlist)
 162                                 {
 163                                         for (SpamList::iterator i = spamlist->begin(); i != spamlist->end(); i++)
 164                                         {
 165                                                 if (*i == word)
 166                                                 {
 167                                                         spamlist->erase(i);
 168                                                         return 1;
 169                                                 }
 170                                         }
 171                                 }
 172                                 WriteServ(user->fd,"938 %s %s :No such spamfilter word is set",user->nick, chan->name);
 173                                 return -1;
 174                         }
 175                         return -1;
 176                 }
 177                 return 0;
 178         }
 179
 180         virtual void OnSendList(userrec* user, chanrec* channel, char mode)
 181         {
 182                 if (mode == 'g')
 183                 {
 184                         SpamList* spamlist = (SpamList*)channel->GetExt("spam_list");
 185                         if (spamlist)
 186                         {
 187                                 for (SpamList::iterator i = spamlist->begin(); i != spamlist->end(); i++)
 188                                 {
 189                                         WriteServ(user->fd,"941 %s %s %s",user->nick, channel->name,i->c_str());
 190                                 }
 191                         }
 192                         WriteServ(user->fd,"940 %s %s :End of channel spamfilter list",user->nick, channel->name);
 193                 }
 194         }
 195
 196         virtual ~ModuleChanFilter()
 197         {
 198                 DELETE(Conf);
 199         }
 200
 201         virtual Version GetVersion()
 202         {
 203                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
 204         }
 205
 206         virtual void OnSyncChannel(chanrec* chan, Module* proto, void* opaque)
 207         {
 208                 SpamList* spamlist = (SpamList*)chan->GetExt("spam_list");
 209                 string_list commands;
 210                 if (spamlist)
 211                 {
 212                         for (SpamList::iterator i = spamlist->begin(); i != spamlist->end(); i++)
 213                         {
 214                                 proto->ProtoSendMode(opaque,TYPE_CHANNEL,chan,"+g "+std::string(i->c_str()));
 215                         }
 216                 }
 217         }
 218
 219 };
 220
 221
 222 class ModuleChanFilterFactory : public ModuleFactory
 223 {
 224  public:
 225         ModuleChanFilterFactory()
 226         {
 227         }
 228
 229         ~ModuleChanFilterFactory()
 230         {
 231         }
 232
 233         virtual Module * CreateModule(Server* Me)
 234         {
 235                 return new ModuleChanFilter(Me);
 236         }
 237
 238 };
 239
 240
 241 extern "C" void * init_module( void )
 242 {
 243         return new ModuleChanFilterFactory;
 244 }
 245