src/modules/m_kicknorejoin.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include <time.h>
  15 #include <map>
  16 #include <vector>
  17 #include <sstream>
  18 #include "users.h"
  19 #include "channels.h"
  20 #include "modules.h"
  21 #include "inspircd.h"
  22
  23 /* $ModDesc: Provides channel mode +J (delay rejoin after kick) */
  24
  25
  26
  27 inline int strtoint(const std::string &str)
  28 {
  29         std::istringstream ss(str);
  30         int result;
  31         ss >> result;
  32         return result;
  33 }
  34
  35 typedef std::map<userrec*, time_t> delaylist;
  36
  37 /** Handles channel mode +J
  38  */
  39 class KickRejoin : public ModeHandler
  40 {
  41  public:
  42         KickRejoin(InspIRCd* Instance) : ModeHandler(Instance, 'J', 1, 0, false, MODETYPE_CHANNEL, false) { }
  43
  44         ModePair ModeSet(userrec* source, userrec* dest, chanrec* channel, const std::string &parameter)
  45         {
  46                 if (channel->IsModeSet('J'))
  47                         return std::make_pair(true, channel->GetModeParameter('J'));
  48                 else
  49                         return std::make_pair(false, parameter);
  50         }
  51
  52         bool CheckTimeStamp(time_t theirs, time_t ours, const std::string &their_param, const std::string &our_param, chanrec* channel)
  53         {
  54                 /* When TS is equal, the alphabetically later one wins */
  55                 return (their_param < our_param);
  56         }
  57
  58         ModeAction OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding)
  59         {
  60                 if (!adding)
  61                 {
  62                         // Taking the mode off, we need to clean up.
  63                         delaylist* dl;
  64
  65                         if (channel->GetExt("norejoinusers", dl))
  66                         {
  67                                 DELETE(dl);
  68                                 channel->Shrink("norejoinusers");
  69                         }
  70
  71                         if (!channel->IsModeSet('J'))
  72                         {
  73                                 return MODEACTION_DENY;
  74                         }
  75                         else
  76                         {
  77                                 channel->SetMode('J', false);
  78                                 return MODEACTION_ALLOW;
  79                         }
  80                 }
  81                 else if (atoi(parameter.c_str()) > 0)
  82                 {
  83                         ServerInstance->Log(DEBUG,"Got parameter: '%s'",parameter.c_str());
  84
  85                         if (!channel->IsModeSet('J'))
  86                         {
  87                                 parameter = ConvToStr(atoi(parameter.c_str()));
  88                                 channel->SetModeParam('J', parameter.c_str(), adding);
  89                                 channel->SetMode('J', adding);
  90                                 return MODEACTION_ALLOW;
  91                         }
  92                         else
  93                         {
  94                                 std::string cur_param = channel->GetModeParameter('J');
  95                                 if (cur_param == parameter)
  96                                 {
  97                                         // mode params match, don't change mode
  98                                         return MODEACTION_DENY;
  99                                 }
 100                                 else
 101                                 {
 102                                         // new mode param, replace old with new
 103                                         parameter = ConvToStr(atoi(parameter.c_str()));
 104                                         cur_param = ConvToStr(atoi(cur_param.c_str()));
 105                                         if (parameter != "0")
 106                                         {
 107                                                 channel->SetModeParam('J', cur_param.c_str(), false);
 108                                                 channel->SetModeParam('J', parameter.c_str(), adding);
 109                                                 return MODEACTION_ALLOW;
 110                                         }
 111                                         else
 112                                         {
 113                                                 /* Fix to jamie's fix, dont allow +J 0 on the new value! */
 114                                                 return MODEACTION_DENY;
 115                                         }
 116                                 }
 117                         }
 118                 }
 119                 else
 120                 {
 121                         return MODEACTION_DENY;
 122                 }
 123         }
 124 };
 125
 126 class ModuleKickNoRejoin : public Module
 127 {
 128
 129         KickRejoin* kr;
 130
 131 public:
 132
 133         ModuleKickNoRejoin(InspIRCd* Me)
 134                 : Module::Module(Me)
 135         {
 136
 137                 kr = new KickRejoin(ServerInstance);
 138                 if (!ServerInstance->AddMode(kr, 'J'))
 139                         throw ModuleException("Could not add new modes!");
 140         }
 141
 142         virtual int OnUserPreJoin(userrec* user, chanrec* chan, const char* cname, std::string &privs)
 143         {
 144                 if (chan)
 145                 {
 146                         delaylist* dl;
 147                         if (chan->GetExt("norejoinusers", dl))
 148                         {
 149                                 ServerInstance->Log(DEBUG, "m_kicknorejoin.so: got delay list, iterating over it");
 150                                 std::vector<userrec*> itemstoremove;
 151
 152                                 for (delaylist::iterator iter = dl->begin(); iter != dl->end(); iter++)
 153                                 {
 154                                         ServerInstance->Log(DEBUG, "m_kicknorejoin.so:\t[%s] => %d", iter->first->nick, iter->second);
 155                                         if (iter->second > time(NULL))
 156                                         {
 157                                                 ServerInstance->Log(DEBUG, "m_kicknorejoin.so: still inside time slot");
 158                                                 if (iter->first == user)
 159                                                 {
 160                                                         ServerInstance->Log(DEBUG, "m_kicknorejoin.so: and we have the right user");
 161                                                         user->WriteServ( "495 %s %s :You cannot rejoin this channel yet after being kicked (+J)", user->nick, chan->name);
 162                                                         return 1;
 163                                                 }
 164                                         }
 165                                         else
 166                                         {
 167                                                 // Expired record, remove.
 168                                                 ServerInstance->Log(DEBUG, "m_kicknorejoin.so: record expired");
 169                                                 itemstoremove.push_back(iter->first);
 170                                         }
 171                                 }
 172
 173                                 for (unsigned int i = 0; i < itemstoremove.size(); i++)
 174                                         dl->erase(itemstoremove[i]);
 175
 176                                 if (!dl->size())
 177                                 {
 178                                         // Now it's empty..
 179                                         DELETE(dl);
 180                                         chan->Shrink("norejoinusers");
 181                                 }
 182                         }
 183                 }
 184                 return 0;
 185         }
 186
 187         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
 188         {
 189                 if (chan->IsModeSet('J') && (source != user))
 190                 {
 191                         delaylist* dl;
 192                         if (!chan->GetExt("norejoinusers", dl))
 193                         {
 194                                 dl = new delaylist;
 195                                 chan->Extend("norejoinusers", dl);
 196                         }
 197
 198                         ServerInstance->Log(DEBUG, "m_kicknorejoin.so: setting record for %s, %d second delay", user->nick, strtoint(chan->GetModeParameter('J')));
 199                         (*dl)[user] = time(NULL) + strtoint(chan->GetModeParameter('J'));
 200                 }
 201         }
 202
 203         virtual void OnChannelDelete(chanrec* chan)
 204         {
 205                 delaylist* dl;
 206
 207                 if (chan->GetExt("norejoinusers", dl))
 208                 {
 209                         DELETE(dl);
 210                         chan->Shrink("norejoinusers");
 211                 }
 212         }
 213
 214         virtual void OnCleanup(int target_type, void* item)
 215         {
 216                 if(target_type == TYPE_CHANNEL)
 217                         OnChannelDelete((chanrec*)item);
 218         }
 219
 220         virtual void Implements(char* List)
 221         {
 222                 List[I_OnCleanup] = List[I_OnChannelDelete] = List[I_OnUserPreJoin] = List[I_OnUserKick] = 1;
 223         }
 224
 225         virtual ~ModuleKickNoRejoin()
 226         {
 227                 ServerInstance->Modes->DelMode(kr);
 228                 DELETE(kr);
 229         }
 230
 231         virtual Version GetVersion()
 232         {
 233                 return Version(1, 1, 0, 0, VF_COMMON | VF_VENDOR, API_VERSION);
 234         }
 235 };
 236
 237
 238 class ModuleKickNoRejoinFactory : public ModuleFactory
 239 {
 240  public:
 241         ModuleKickNoRejoinFactory()
 242         {
 243         }
 244
 245         ~ModuleKickNoRejoinFactory()
 246         {
 247         }
 248
 249         virtual Module * CreateModule(InspIRCd* Me)
 250         {
 251                 return new ModuleKickNoRejoin(Me);
 252         }
 253
 254 };
 255
 256
 257 extern "C" void * init_module( void )
 258 {
 259         return new ModuleKickNoRejoinFactory;
 260 }
 261