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