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         void Implements(char* List)
  51         {
  52                 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;
  53         }
  54
  55         virtual void On005Numeric(std::string &output)
  56         {
  57                 std::stringstream line(output);
  58                 std::string temp1, temp2;
  59                 while (!line.eof())
  60                 {
  61                         line >> temp1;
  62                         if (temp1.substr(0,10) == "CHANMODES=")
  63                         {
  64                                 // append the chanmode to the end
  65                                 temp1 = temp1.substr(10,temp1.length());
  66                                 temp1 = "CHANMODES=g" + temp1;
  67                         }
  68                         temp2 = temp2 + temp1 + " ";
  69                 }
  70                 if (temp2.length())
  71                         output = temp2.substr(0,temp2.length()-1);
  72         }
  73
  74         virtual void OnUserPart(userrec* user, chanrec* channel)
  75         {
  76                 // when the last user parts, delete the list
  77                 if (Srv->CountUsers(channel) == 1)
  78                 {
  79                         SpamList* spamlist = (SpamList*)channel->GetExt("spam_list");
  80                         if (spamlist)
  81                         {
  82                                 channel->Shrink("spam_list");
  83                                 delete spamlist;
  84                         }
  85                 }
  86         }
  87
  88         virtual void OnRehash(std::string parameter)
  89         {
  90                 delete Conf;
  91                 Conf = new ConfigReader;
  92                 // re-read our config options on a rehash
  93                 MaxEntries = Conf->ReadInteger("chanfilter","maxsize",0,true);
  94         }
  95
  96         virtual int ProcessMessages(userrec* user,chanrec* chan,std::string &text)
  97         {
  98                 char buffer[MAXBUF];
  99                 strlcpy(buffer,text.c_str(),MAXBUF);
 100                 for (unsigned int j = 0; j < strlen(buffer); j++)
 101                         buffer[j] = tolower(buffer[j]);
 102                 SpamList* spamlist = (SpamList*)chan->GetExt("spam_list");
 103                 if (spamlist)
 104                 {
 105                         for (SpamList::iterator i = spamlist->begin(); i != spamlist->end(); i++)
 106                         {
 107                                 if (strstr(buffer,i->c_str()))
 108                                 {
 109                                         WriteServ(user->fd,"936 %s %s :Your message contained a censored word, and was blocked",user->nick, chan->name);
 110                                         return 1;
 111                                 }
 112                         }
 113                 }
 114                 return 0;
 115         }
 116
 117         virtual int OnUserPreMessage(userrec* user,void* dest,int target_type, std::string &text)
 118         {
 119                 if (target_type == TYPE_CHANNEL)
 120                 {
 121                         return ProcessMessages(user,(chanrec*)dest,text);
 122                 }
 123                 else return 0;
 124         }
 125
 126         virtual int OnUserPreNotice(userrec* user,void* dest,int target_type, std::string &text)
 127         {
 128                 if (target_type == TYPE_CHANNEL)
 129                 {
 130                         return ProcessMessages(user,(chanrec*)dest,text);
 131                 }
 132                 else return 0;
 133         }
 134
 135         virtual int OnExtendedMode(userrec* user, void* target, char modechar, int type, bool mode_on, string_list &params)
 136         {
 137                 if ((modechar == 'g') && (type == MT_CHANNEL))
 138                 {
 139                         chanrec* chan = (chanrec*)target;
 140
 141                         for (unsigned int j = 0; j < params[0].length(); j++)
 142                                 params[0][j] = tolower(params[0][j]);
 143
 144                         std::string param = params[0];
 145
 146                         if (mode_on)
 147                         {
 148                                 SpamList* spamlist = (SpamList*)chan->GetExt("spam_list");
 149                                 if (!spamlist)
 150                                 {
 151                                         spamlist = new SpamList;
 152                                         chan->Extend("spam_list",(char*)spamlist);
 153                                 }
 154                                 if (spamlist->size() < (unsigned)MaxEntries)
 155                                 {
 156                                         for (SpamList::iterator i = spamlist->begin(); i != spamlist->end(); i++)
 157                                         {
 158                                                 if (*i == params[0])
 159                                                 {
 160                                                         WriteServ(user->fd,"937 %s %s :The word %s is already on the spamfilter list",user->nick, chan->name,params[0].c_str());
 161                                                         return -1;
 162                                                 }
 163                                         }
 164                                         spamlist->push_back(params[0]);
 165                                         return 1;
 166                                 }
 167                                 WriteServ(user->fd,"939 %s %s :Channel spamfilter list is full",user->nick, chan->name);
 168                                 return -1;
 169                         }
 170                         else
 171                         {
 172                                 SpamList* spamlist = (SpamList*)chan->GetExt("spam_list");
 173                                 if (spamlist)
 174                                 {
 175                                         for (SpamList::iterator i = spamlist->begin(); i != spamlist->end(); i++)
 176                                         {
 177                                                 if (*i == params[0])
 178                                                 {
 179                                                         spamlist->erase(i);
 180                                                         return 1;
 181                                                 }
 182                                         }
 183                                 }
 184                                 WriteServ(user->fd,"938 %s %s :No such spamfilter word is set",user->nick, chan->name);
 185                                 return -1;
 186                         }
 187                         return -1;
 188                 }
 189                 return 0;
 190         }
 191
 192         virtual void OnSendList(userrec* user, chanrec* channel, char mode)
 193         {
 194                 if (mode == 'g')
 195                 {
 196                         SpamList* spamlist = (SpamList*)channel->GetExt("spam_list");
 197                         if (spamlist)
 198                         {
 199                                 for (SpamList::iterator i = spamlist->begin(); i != spamlist->end(); i++)
 200                                 {
 201                                         WriteServ(user->fd,"941 %s %s %s",user->nick, channel->name,i->c_str());
 202                                 }
 203                         }
 204                         WriteServ(user->fd,"940 %s %s :End of channel spamfilter list",user->nick, channel->name);
 205                 }
 206         }
 207
 208         virtual ~ModuleChanFilter()
 209         {
 210                 delete Conf;
 211         }
 212
 213         virtual Version GetVersion()
 214         {
 215                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
 216         }
 217
 218         virtual void OnSyncChannel(chanrec* chan, Module* proto, void* opaque)
 219         {
 220                 SpamList* spamlist = (SpamList*)chan->GetExt("spam_list");
 221                 string_list commands;
 222                 if (spamlist)
 223                 {
 224                         for (SpamList::iterator i = spamlist->begin(); i != spamlist->end(); i++)
 225                         {
 226                                 proto->ProtoSendMode(opaque,TYPE_CHANNEL,chan,"+g "+*i);
 227                         }
 228                 }
 229         }
 230
 231 };
 232
 233
 234 class ModuleChanFilterFactory : public ModuleFactory
 235 {
 236  public:
 237         ModuleChanFilterFactory()
 238         {
 239         }
 240
 241         ~ModuleChanFilterFactory()
 242         {
 243         }
 244
 245         virtual Module * CreateModule(Server* Me)
 246         {
 247                 return new ModuleChanFilter(Me);
 248         }
 249
 250 };
 251
 252
 253 extern "C" void * init_module( void )
 254 {
 255         return new ModuleChanFilterFactory;
 256 }
 257