src/modules/m_chanfilter.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  Inspire is copyright (C) 2002-2004 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
  27 /* $ModDesc: Provides channel-specific censor lists (like mode +G but varies from channel to channel) */
  28
  29 typedef std::vector<std::string> SpamList;
  30
  31 class ModuleChanFilter : public Module
  32 {
  33         Server *Srv;
  34         ConfigReader *Conf;
  35         long MaxEntries;
  36
  37  public:
  38
  39         ModuleChanFilter(Server* Me)
  40                 : Module::Module(Me)
  41         {
  42                 Srv = Me;
  43                 Conf = new ConfigReader;
  44                 Srv->AddExtendedListMode('g');
  45                 MaxEntries = Conf->ReadInteger("chanfilter","maxsize",0,true);
  46                 if (MaxEntries == 0)
  47                         MaxEntries = 32;
  48         }
  49
  50         virtual void On005Numeric(std::string &output)
  51         {
  52                 std::stringstream line(output);
  53                 std::string temp1, temp2;
  54                 while (!line.eof())
  55                 {
  56                         line >> temp1;
  57                         if (temp1.substr(0,10) == "CHANMODES=")
  58                         {
  59                                 // append the chanmode to the end
  60                                 temp1 = temp1.substr(10,temp1.length());
  61                                 temp1 = "CHANMODES=g" + temp1;
  62                         }
  63                         temp2 = temp2 + temp1 + " ";
  64                 }
  65                 if (temp2.length())
  66                         output = temp2.substr(0,temp2.length()-1);
  67         }
  68
  69         virtual void OnUserPart(userrec* user, chanrec* channel)
  70         {
  71                 // when the last user parts, delete the list
  72                 if (Srv->CountUsers(channel) == 1)
  73                 {
  74                         SpamList* spamlist = (SpamList*)channel->GetExt("spam_list");
  75                         if (spamlist)
  76                         {
  77                                 channel->Shrink("spam_list");
  78                                 delete spamlist;
  79                         }
  80                 }
  81         }
  82
  83         virtual void OnRehash(std::string parameter)
  84         {
  85                 delete Conf;
  86                 Conf = new ConfigReader;
  87                 // re-read our config options on a rehash
  88                 MaxEntries = Conf->ReadInteger("chanfilter","maxsize",0,true);
  89         }
  90
  91         virtual int ProcessMessages(userrec* user,chanrec* chan,std::string &text)
  92         {
  93                 char buffer[MAXBUF];
  94                 strlcpy(buffer,text.c_str(),MAXBUF);
  95                 for (unsigned int j = 0; j < strlen(buffer); j++)
  96                         buffer[j] = tolower(buffer[j]);
  97                 SpamList* spamlist = (SpamList*)chan->GetExt("spam_list");
  98                 if (spamlist)
  99                 {
 100                         for (SpamList::iterator i = spamlist->begin(); i != spamlist->end(); i++)
 101                         {
 102                                 if (strstr(buffer,i->c_str()))
 103                                 {
 104                                         WriteServ(user->fd,"936 %s %s :Your message contained a censored word, and was blocked",user->nick, chan->name);
 105                                         return 1;
 106                                 }
 107                         }
 108                 }
 109                 return 0;
 110         }
 111
 112         virtual int OnUserPreMessage(userrec* user,void* dest,int target_type, std::string &text)
 113         {
 114                 if (target_type == TYPE_CHANNEL)
 115                 {
 116                         return ProcessMessages(user,(chanrec*)dest,text);
 117                 }
 118                 else return 0;
 119         }
 120
 121         virtual int OnUserPreNotice(userrec* user,void* dest,int target_type, std::string &text)
 122         {
 123                 if (target_type == TYPE_CHANNEL)
 124                 {
 125                         return ProcessMessages(user,(chanrec*)dest,text);
 126                 }
 127                 else return 0;
 128         }
 129
 130         virtual int OnExtendedMode(userrec* user, void* target, char modechar, int type, bool mode_on, string_list &params)
 131         {
 132                 if ((modechar == 'g') && (type == MT_CHANNEL))
 133                 {
 134                         chanrec* chan = (chanrec*)target;
 135
 136                         for (unsigned int j = 0; j < params[0].length(); j++)
 137                                 params[0][j] = tolower(params[0][j]);
 138
 139                         std::string param = params[0];
 140
 141                         if (mode_on)
 142                         {
 143                                 SpamList* spamlist = (SpamList*)chan->GetExt("spam_list");
 144                                 if (!spamlist)
 145                                 {
 146                                         spamlist = new SpamList;
 147                                         chan->Extend("spam_list",(char*)spamlist);
 148                                 }
 149                                 if (spamlist->size() < (unsigned)MaxEntries)
 150                                 {
 151                                         for (SpamList::iterator i = spamlist->begin(); i != spamlist->end(); i++)
 152                                         {
 153                                                 if (*i == params[0])
 154                                                 {
 155                                                         WriteServ(user->fd,"937 %s %s :The word %s is already on the spamfilter list",user->nick, chan->name,params[0].c_str());
 156                                                         return -1;
 157                                                 }
 158                                         }
 159                                         spamlist->push_back(params[0]);
 160                                         return 1;
 161                                 }
 162                                 WriteServ(user->fd,"939 %s %s :Channel spamfilter list is full",user->nick, chan->name);
 163                                 return -1;
 164                         }
 165                         else
 166                         {
 167                                 SpamList* spamlist = (SpamList*)chan->GetExt("spam_list");
 168                                 if (spamlist)
 169                                 {
 170                                         for (SpamList::iterator i = spamlist->begin(); i != spamlist->end(); i++)
 171                                         {
 172                                                 if (*i == params[0])
 173                                                 {
 174                                                         spamlist->erase(i);
 175                                                         return 1;
 176                                                 }
 177                                         }
 178                                 }
 179                                 WriteServ(user->fd,"938 %s %s :No such spamfilter word is set",user->nick, chan->name);
 180                                 return -1;
 181                         }
 182                         return -1;
 183                 }
 184                 return 0;
 185         }
 186
 187         virtual void OnSendList(userrec* user, chanrec* channel, char mode)
 188         {
 189                 if (mode == 'g')
 190                 {
 191                         SpamList* spamlist = (SpamList*)channel->GetExt("spam_list");
 192                         if (spamlist)
 193                         {
 194                                 for (SpamList::iterator i = spamlist->begin(); i != spamlist->end(); i++)
 195                                 {
 196                                         WriteServ(user->fd,"941 %s %s %s",user->nick, channel->name,i->c_str());
 197                                 }
 198                         }
 199                         WriteServ(user->fd,"940 %s %s :End of channel spamfilter list",user->nick, channel->name);
 200                 }
 201         }
 202
 203         virtual ~ModuleChanFilter()
 204         {
 205                 delete Conf;
 206         }
 207
 208         virtual Version GetVersion()
 209         {
 210                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
 211         }
 212
 213         virtual void OnSyncChannel(chanrec* chan, Module* proto, void* opaque)
 214         {
 215                 SpamList* spamlist = (SpamList*)chan->GetExt("spam_list");
 216                 string_list commands;
 217                 if (spamlist)
 218                 {
 219                         for (SpamList::iterator i = spamlist->begin(); i != spamlist->end(); i++)
 220                         {
 221                                 proto->ProtoSendMode(opaque,TYPE_CHANNEL,chan,"+g "+*i);
 222                         }
 223                 }
 224         }
 225
 226 };
 227
 228
 229 class ModuleChanFilterFactory : public ModuleFactory
 230 {
 231  public:
 232         ModuleChanFilterFactory()
 233         {
 234         }
 235
 236         ~ModuleChanFilterFactory()
 237         {
 238         }
 239
 240         virtual Module * CreateModule(Server* Me)
 241         {
 242                 return new ModuleChanFilter(Me);
 243         }
 244
 245 };
 246
 247
 248 extern "C" void * init_module( void )
 249 {
 250         return new ModuleChanFilterFactory;
 251 }
 252