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 /** Holds a CBAN item
  28  */
  29 class CBan : public classbase
  30 {
  31 public:
  32         irc::string chname;
  33         std::string set_by;
  34         time_t set_on;
  35         long length;
  36         std::string reason;
  37
  38         CBan()
  39         {
  40         }
  41
  42         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)
  43         {
  44         }
  45 };
  46
  47 bool CBanComp(const CBan &ban1, const CBan &ban2);
  48
  49 typedef std::vector<CBan> cbanlist;
  50
  51 /* cbans is declared here, as our type is right above. Don't try move it. */
  52 cbanlist cbans;
  53
  54 /** Handle /CBAN
  55  */
  56 class cmd_cban : public command_t
  57 {
  58  public:
  59         cmd_cban(InspIRCd* Me) : command_t(Me, "CBAN", 'o', 1)
  60         {
  61                 this->source = "m_cban.so";
  62                 this->
  63                 syntax = "<channel> [<duration> :<reason>]";
  64         }
  65
  66         CmdResult Handle(const char** parameters, int pcnt, userrec *user)
  67         {
  68                 /* syntax: CBAN #channel time :reason goes here */
  69                 /* 'time' is a human-readable timestring, like 2d3h2s. */
  70
  71                 if(pcnt == 1)
  72                 {
  73                         /* form: CBAN #channel removes a CBAN */
  74                         for (cbanlist::iterator iter = cbans.begin(); iter != cbans.end(); iter++)
  75                         {
  76                                 if (parameters[0] == iter->chname)
  77                                 {
  78                                         unsigned long remaining = (iter->set_on + iter->length) - ServerInstance->Time();
  79                                         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());
  80                                         cbans.erase(iter);
  81                                         break;
  82                                 }
  83                         }
  84                 }
  85                 else if (pcnt >= 2)
  86                 {
  87                         /* full form to add a CBAN */
  88                         if (ServerInstance->IsChannel(parameters[0]))
  89                         {
  90                                 // parameters[0] = #channel
  91                                 // parameters[1] = 1h3m2s
  92                                 // parameters[2] = Tortoise abuser
  93                                 long length = ServerInstance->Duration(parameters[1]);
  94                                 std::string reason = (pcnt > 2) ? parameters[2] : "No reason supplied";
  95
  96                                 cbans.push_back(CBan(parameters[0], user->nick, ServerInstance->Time(), length, reason));
  97
  98                                 std::sort(cbans.begin(), cbans.end(), CBanComp);
  99
 100                                 if(length > 0)
 101                                 {
 102                                         user->WriteServ( "385 %s %s :Added %lu second channel ban (%s)", user->nick, parameters[0], length, reason.c_str());
 103                                         ServerInstance->WriteOpers("*** %s added %lu second channel ban on %s (%s)", user->nick, length, parameters[0], reason.c_str());
 104                                 }
 105                                 else
 106                                 {
 107                                         user->WriteServ( "385 %s %s :Added permenant channel ban (%s)", user->nick, parameters[0], reason.c_str());
 108                                         ServerInstance->WriteOpers("*** %s added permenant channel ban on %s (%s)", user->nick, parameters[0], reason.c_str());
 109                                 }
 110                         }
 111                         else
 112                         {
 113                                 user->WriteServ( "403 %s %s :Invalid channel name", user->nick, parameters[0]);
 114                                 return CMD_FAILURE;
 115                         }
 116                 }
 117
 118                 return CMD_SUCCESS;
 119         }
 120 };
 121
 122 bool CBanComp(const CBan &ban1, const CBan &ban2)
 123 {
 124         return ((ban1.set_on + ban1.length) < (ban2.set_on + ban2.length));
 125 }
 126
 127 class ModuleCBan : public Module
 128 {
 129         cmd_cban* mycommand;
 130
 131
 132  public:
 133         ModuleCBan(InspIRCd* Me) : Module::Module(Me)
 134         {
 135
 136                 mycommand = new cmd_cban(Me);
 137                 ServerInstance->AddCommand(mycommand);
 138         }
 139
 140         void Implements(char* List)
 141         {
 142                 List[I_OnUserPreJoin] = List[I_OnSyncOtherMetaData] = List[I_OnDecodeMetaData] = List[I_OnStats] = 1;
 143         }
 144
 145         virtual int OnStats(char symbol, userrec* user, string_list &results)
 146         {
 147                 ExpireBans();
 148
 149                 if(symbol == 'C')
 150                 {
 151                         for(cbanlist::iterator iter = cbans.begin(); iter != cbans.end(); iter++)
 152                         {
 153                                 unsigned long remaining = (iter->set_on + iter->length) - ServerInstance->Time();
 154                                 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);
 155                         }
 156                 }
 157
 158                 return 0;
 159         }
 160
 161         virtual int OnUserPreJoin(userrec *user, chanrec *chan, const char *cname, std::string &privs)
 162         {
 163                 ExpireBans();
 164
 165                 /* check cbans in here, and apply as necessary. */
 166                 for(cbanlist::iterator iter = cbans.begin(); iter != cbans.end(); iter++)
 167                 {
 168                         if(iter->chname == cname && !user->modes[UM_OPERATOR])
 169                         {
 170                                 // Channel is banned.
 171                                 user->WriteServ( "384 %s %s :Cannot join channel, CBANed (%s)", user->nick, cname, iter->reason.c_str());
 172                                 ServerInstance->WriteOpers("*** %s tried to join %s which is CBANed (%s)", user->nick, cname, iter->reason.c_str());
 173                                 return 1;
 174                         }
 175                 }
 176                 return 0;
 177         }
 178
 179         virtual void OnSyncOtherMetaData(Module* proto, void* opaque)
 180         {
 181                 for(cbanlist::iterator iter = cbans.begin(); iter != cbans.end(); iter++)
 182                 {
 183                         proto->ProtoSendMetaData(opaque, TYPE_OTHER, NULL, "cban", EncodeCBan(*iter));
 184                 }
 185         }
 186
 187         virtual void OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata)
 188         {
 189                 if((target_type == TYPE_OTHER) && (extname == "cban"))
 190                 {
 191                         cbans.push_back(DecodeCBan(extdata));
 192                         std::sort(cbans.begin(), cbans.end(), CBanComp);
 193                 }
 194         }
 195
 196         virtual ~ModuleCBan()
 197         {
 198         }
 199
 200         virtual Version GetVersion()
 201         {
 202                 return Version(1,1,0,1,VF_VENDOR,API_VERSION);
 203         }
 204
 205         std::string EncodeCBan(const CBan &ban)
 206         {
 207                 std::ostringstream stream;
 208                 stream << ban.chname << " " << ban.set_by << " " << ban.set_on << " " << ban.length << " " << ban.reason;
 209                 return stream.str();
 210         }
 211
 212         CBan DecodeCBan(const std::string &data)
 213         {
 214                 CBan res;
 215                 std::istringstream stream(data);
 216                 stream >> res.chname;
 217                 stream >> res.set_by;
 218                 stream >> res.set_on;
 219                 stream >> res.length;
 220                 res.reason = stream.str();
 221
 222                 return res;
 223         }
 224
 225         void ExpireBans()
 226         {
 227                 bool go_again = true;
 228
 229                 while (go_again)
 230                 {
 231                         go_again = false;
 232
 233                         for (cbanlist::iterator iter = cbans.begin(); iter != cbans.end(); iter++)
 234                         {
 235                                 /* 0 == permanent, don't mess with them! -- w00t */
 236                                 if (iter->length != 0)
 237                                 {
 238                                         if (iter->set_on + iter->length <= ServerInstance->Time())
 239                                         {
 240                                                 ServerInstance->Log(DEBUG, "m_cban.so: Ban on %s expired, removing...", iter->chname.c_str());
 241                                                 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);
 242                                                 cbans.erase(iter);
 243                                                 go_again = true;
 244                                         }
 245                                 }
 246
 247                                 if (go_again == true)
 248                                         break;
 249                         }
 250                 }
 251         }
 252 };
 253
 254 class ModuleCBanFactory : public ModuleFactory
 255 {
 256  public:
 257         ModuleCBanFactory()
 258         {
 259         }
 260
 261         ~ModuleCBanFactory()
 262         {
 263         }
 264
 265         virtual Module * CreateModule(InspIRCd* Me)
 266         {
 267                 return new ModuleCBan(Me);
 268         }
 269
 270 };
 271
 272
 273 extern "C" void * init_module( void )
 274 {
 275         return new ModuleCBanFactory;
 276 }