src/modules/m_cban.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  *                <omster@gmail.com>
  10  *
  11  * Written by Craig Edwards, Craig McLure, and others.
  12  * This program is free but copyrighted software; see
  13  * the file COPYING for details.
  14  *
  15  * ---------------------------------------------------
  16  */
  17
  18 #include <algorithm>
  19 #include "users.h"
  20 #include "channels.h"
  21 #include "modules.h"
  22 #include "configreader.h"
  23 #include "inspircd.h"
  24
  25 /* $ModDesc: Gives /cban, aka C:lines. Think Q:lines, for channels. */
  26
  27 class CBan : public classbase
  28 {
  29 public:
  30         irc::string chname;
  31         std::string set_by;
  32         time_t set_on;
  33         long length;
  34         std::string reason;
  35
  36         CBan()
  37         {
  38         }
  39
  40         CBan(irc::string cn, std::string sb, time_t so, long ln, std::string rs) : chname(cn), set_by(sb), set_on(so), length(ln), reason(rs)
  41         {
  42         }
  43 };
  44
  45 bool CBanComp(const CBan &ban1, const CBan &ban2);
  46
  47 typedef std::vector<CBan> cbanlist;
  48
  49 /* cbans is declared here, as our type is right above. Don't try move it. */
  50 cbanlist cbans;
  51
  52 class cmd_cban : public command_t
  53 {
  54  public:
  55         cmd_cban(InspIRCd* Me) : command_t(Me, "CBAN", 'o', 1)
  56         {
  57                 this->source = "m_cban.so";
  58                 this->
  59                 syntax = "<channel> [<duration> :<reason>]";
  60         }
  61
  62         void Handle(const char** parameters, int pcnt, userrec *user)
  63         {
  64                 /* syntax: CBAN #channel time :reason goes here */
  65                 /* 'time' is a human-readable timestring, like 2d3h2s. */
  66
  67                 if(pcnt == 1)
  68                 {
  69                         /* form: CBAN #channel removes a CBAN */
  70                         for (cbanlist::iterator iter = cbans.begin(); iter != cbans.end(); iter++)
  71                         {
  72                                 if (parameters[0] == iter->chname)
  73                                 {
  74                                         unsigned long remaining = (iter->set_on + iter->length) - ServerInstance->Time();
  75                                         user->WriteServ( "386 %s %s :Removed CBAN with %lu seconds left before expiry (%s)", user->nick, iter->chname.c_str(), remaining, iter->reason.c_str());
  76                                         cbans.erase(iter);
  77                                         break;
  78                                 }
  79                         }
  80                 }
  81                 else if (pcnt >= 2)
  82                 {
  83                         /* full form to add a CBAN */
  84                         if (ServerInstance->IsChannel(parameters[0]))
  85                         {
  86                                 // parameters[0] = #channel
  87                                 // parameters[1] = 1h3m2s
  88                                 // parameters[2] = Tortoise abuser
  89                                 long length = ServerInstance->Duration(parameters[1]);
  90                                 std::string reason = (pcnt > 2) ? parameters[2] : "No reason supplied";
  91
  92                                 cbans.push_back(CBan(parameters[0], user->nick, ServerInstance->Time(), length, reason));
  93
  94                                 std::sort(cbans.begin(), cbans.end(), CBanComp);
  95
  96                                 if(length > 0)
  97                                 {
  98                                         user->WriteServ( "385 %s %s :Added %lu second channel ban (%s)", user->nick, parameters[0], length, reason.c_str());
  99                                         ServerInstance->WriteOpers("*** %s added %lu second channel ban on %s (%s)", user->nick, length, parameters[0], reason.c_str());
 100                                 }
 101                                 else
 102                                 {
 103                                         user->WriteServ( "385 %s %s :Added permenant channel ban (%s)", user->nick, parameters[0], reason.c_str());
 104                                         ServerInstance->WriteOpers("*** %s added permenant channel ban on %s (%s)", user->nick, parameters[0], reason.c_str());
 105                                 }
 106                         }
 107                         else
 108                         {
 109                                 user->WriteServ( "403 %s %s :Invalid channel name", user->nick, parameters[0]);
 110                         }
 111                 }
 112         }
 113 };
 114
 115 bool CBanComp(const CBan &ban1, const CBan &ban2)
 116 {
 117         return ((ban1.set_on + ban1.length) < (ban2.set_on + ban2.length));
 118 }
 119
 120 class ModuleCBan : public Module
 121 {
 122         cmd_cban* mycommand;
 123
 124
 125  public:
 126         ModuleCBan(InspIRCd* Me) : Module::Module(Me)
 127         {
 128
 129                 mycommand = new cmd_cban(Me);
 130                 ServerInstance->AddCommand(mycommand);
 131         }
 132
 133         void Implements(char* List)
 134         {
 135                 List[I_OnUserPreJoin] = List[I_OnSyncOtherMetaData] = List[I_OnDecodeMetaData] = List[I_OnStats] = 1;
 136         }
 137
 138         virtual int OnStats(char symbol, userrec* user, string_list &results)
 139         {
 140                 ExpireBans();
 141
 142                 if(symbol == 'C')
 143                 {
 144                         for(cbanlist::iterator iter = cbans.begin(); iter != cbans.end(); iter++)
 145                         {
 146                                 unsigned long remaining = (iter->set_on + iter->length) - ServerInstance->Time();
 147                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 210 "+user->nick+" "+iter->chname.c_str()+" "+iter->set_by+" "+ConvToStr(iter->set_on)+" "+ConvToStr(iter->length)+" "+ConvToStr(remaining)+" :"+iter->reason);
 148                         }
 149                 }
 150
 151                 return 0;
 152         }
 153
 154         virtual int OnUserPreJoin(userrec *user, chanrec *chan, const char *cname)
 155         {
 156                 ExpireBans();
 157
 158                 /* check cbans in here, and apply as necessary. */
 159                 for(cbanlist::iterator iter = cbans.begin(); iter != cbans.end(); iter++)
 160                 {
 161                         if(iter->chname == cname && !user->modes[UM_OPERATOR])
 162                         {
 163                                 // Channel is banned.
 164                                 user->WriteServ( "384 %s %s :Cannot join channel, CBANed (%s)", user->nick, cname, iter->reason.c_str());
 165                                 ServerInstance->WriteOpers("*** %s tried to join %s which is CBANed (%s)", user->nick, cname, iter->reason.c_str());
 166                                 return 1;
 167                         }
 168                 }
 169                 return 0;
 170         }
 171
 172         virtual void OnSyncOtherMetaData(Module* proto, void* opaque)
 173         {
 174                 for(cbanlist::iterator iter = cbans.begin(); iter != cbans.end(); iter++)
 175                 {
 176                         proto->ProtoSendMetaData(opaque, TYPE_OTHER, NULL, "cban", EncodeCBan(*iter));
 177                 }
 178         }
 179
 180         virtual void OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata)
 181         {
 182                 if((target_type == TYPE_OTHER) && (extname == "cban"))
 183                 {
 184                         cbans.push_back(DecodeCBan(extdata));
 185                         std::sort(cbans.begin(), cbans.end(), CBanComp);
 186                 }
 187         }
 188
 189         virtual ~ModuleCBan()
 190         {
 191         }
 192
 193         virtual Version GetVersion()
 194         {
 195                 return Version(1,0,0,1,VF_VENDOR);
 196         }
 197
 198         std::string EncodeCBan(const CBan &ban)
 199         {
 200                 std::ostringstream stream;
 201                 stream << ban.chname << " " << ban.set_by << " " << ban.set_on << " " << ban.length << " " << ban.reason;
 202                 return stream.str();
 203         }
 204
 205         CBan DecodeCBan(const std::string &data)
 206         {
 207                 CBan res;
 208                 std::istringstream stream(data);
 209                 stream >> res.chname;
 210                 stream >> res.set_by;
 211                 stream >> res.set_on;
 212                 stream >> res.length;
 213                 res.reason = stream.str();
 214
 215                 return res;
 216         }
 217
 218         void ExpireBans()
 219         {
 220                 bool go_again = true;
 221
 222                 while (go_again)
 223                 {
 224                         go_again = false;
 225
 226                         for (cbanlist::iterator iter = cbans.begin(); iter != cbans.end(); iter++)
 227                         {
 228                                 /* 0 == permanent, don't mess with them! -- w00t */
 229                                 if (iter->length != 0)
 230                                 {
 231                                         if (iter->set_on + iter->length <= ServerInstance->Time())
 232                                         {
 233                                                 ServerInstance->Log(DEBUG, "m_cban.so: Ban on %s expired, removing...", iter->chname.c_str());
 234                                                 ServerInstance->WriteOpers("*** %li second CBAN on %s (%s) set %u seconds ago expired", iter->length, iter->chname.c_str(), iter->reason.c_str(), ServerInstance->Time() - iter->set_on);
 235                                                 cbans.erase(iter);
 236                                                 go_again = true;
 237                                         }
 238                                 }
 239
 240                                 if (go_again == true)
 241                                         break;
 242                         }
 243                 }
 244         }
 245 };
 246
 247 class ModuleCBanFactory : public ModuleFactory
 248 {
 249  public:
 250         ModuleCBanFactory()
 251         {
 252         }
 253
 254         ~ModuleCBanFactory()
 255         {
 256         }
 257
 258         virtual Module * CreateModule(InspIRCd* Me)
 259         {
 260                 return new ModuleCBan(Me);
 261         }
 262
 263 };
 264
 265
 266 extern "C" void * init_module( void )
 267 {
 268         return new ModuleCBanFactory;
 269 }