src/modules/m_redirect.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  *
  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 "users.h"
  20 #include "channels.h"
  21 #include "modules.h"
  22 #include "inspircd.h"
  23
  24 /* $ModDesc: Provides channel mode +L (limit redirection) */
  25
  26 /** Handle channel mode +L
  27  */
  28 class Redirect : public ModeHandler
  29 {
  30  public:
  31         Redirect(InspIRCd* Instance) : ModeHandler(Instance, 'L', 1, 0, false, MODETYPE_CHANNEL, false) { }
  32
  33         ModePair ModeSet(userrec* source, userrec* dest, chanrec* channel, const std::string &parameter)
  34         {
  35                 if (channel->IsModeSet('L'))
  36                         return std::make_pair(true, channel->GetModeParameter('L'));
  37                 else
  38                         return std::make_pair(false, parameter);
  39         }
  40
  41         bool CheckTimeStamp(time_t theirs, time_t ours, const std::string &their_param, const std::string &our_param, chanrec* channel)
  42         {
  43                 /* When TS is equal, the alphabetically later one wins */
  44                 return (their_param < our_param);
  45         }
  46
  47         ModeAction OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding)
  48         {
  49                 if (adding)
  50                 {
  51                         chanrec* c = NULL;
  52
  53                         if (!ServerInstance->IsChannel(parameter.c_str()))
  54                         {
  55                                 source->WriteServ("403 %s %s :Invalid channel name",source->nick, parameter.c_str());
  56                                 parameter = "";
  57                                 return MODEACTION_DENY;
  58                         }
  59
  60                         c = ServerInstance->FindChan(parameter);
  61                         if (c)
  62                         {
  63                                 /* Fix by brain: Dont let a channel be linked to *itself* either */
  64                                 if (IS_LOCAL(source))
  65                                 {
  66                                         if ((c == channel) || (c->IsModeSet('L')))
  67                                         {
  68                                                 source->WriteServ("690 %s :Circular or chained +L to %s not allowed (Channel already has +L). Pack of wild dogs has been unleashed.",source->nick,parameter.c_str());
  69                                                 parameter = "";
  70                                                 return MODEACTION_DENY;
  71                                         }
  72                                         else
  73                                         {
  74                                                 for (chan_hash::const_iterator i = ServerInstance->chanlist.begin(); i != ServerInstance->chanlist.end(); i++)
  75                                                 {
  76                                                         if ((i->second != channel) && (i->second->IsModeSet('L')) && (irc::string(i->second->GetModeParameter('L').c_str()) == irc::string(channel->name)))
  77                                                         {
  78                                                                 source->WriteServ("690 %s :Circular or chained +L to %s not allowed (Already forwarded here from %s). Angry monkeys dispatched.",source->nick,parameter.c_str(),i->second->name);
  79                                                                 return MODEACTION_DENY;
  80                                                         }
  81                                                 }
  82                                         }
  83                                 }
  84                         }
  85
  86                         channel->SetMode('L', true);
  87                         channel->SetModeParam('L', parameter.c_str(), true);
  88                         return MODEACTION_ALLOW;
  89                 }
  90                 else
  91                 {
  92                         if (channel->IsModeSet('L'))
  93                         {
  94                                 channel->SetMode('L', false);
  95                                 return MODEACTION_ALLOW;
  96                         }
  97                 }
  98
  99                 return MODEACTION_DENY;
 100
 101         }
 102 };
 103
 104 class ModuleRedirect : public Module
 105 {
 106
 107         Redirect* re;
 108
 109  public:
 110
 111         ModuleRedirect(InspIRCd* Me)
 112                 : Module::Module(Me)
 113         {
 114
 115                 re = new Redirect(ServerInstance);
 116                 ServerInstance->AddMode(re, 'L');
 117         }
 118
 119         void Implements(char* List)
 120         {
 121                 List[I_OnUserPreJoin] = 1;
 122         }
 123
 124         virtual int OnUserPreJoin(userrec* user, chanrec* chan, const char* cname, std::string &privs)
 125         {
 126                 if (chan)
 127                 {
 128                         if (chan->IsModeSet('L') && chan->limit)
 129                         {
 130                                 if (chan->GetUserCounter() >= chan->limit)
 131                                 {
 132                                         std::string channel = chan->GetModeParameter('L');
 133                                         user->WriteServ("470 %s :%s has become full, so you are automatically being transferred to the linked channel %s",user->nick,cname,channel.c_str());
 134                                         chanrec::JoinUser(ServerInstance, user, channel.c_str(), false);
 135                                         return 1;
 136                                 }
 137                         }
 138                 }
 139                 return 0;
 140         }
 141
 142         virtual ~ModuleRedirect()
 143         {
 144                 ServerInstance->Modes->DelMode(re);
 145                 DELETE(re);
 146         }
 147
 148         virtual Version GetVersion()
 149         {
 150                 return Version(1, 1, 0, 0, VF_COMMON | VF_VENDOR, API_VERSION);
 151         }
 152 };
 153
 154
 155 class ModuleRedirectFactory : public ModuleFactory
 156 {
 157  public:
 158         ModuleRedirectFactory()
 159         {
 160         }
 161
 162         ~ModuleRedirectFactory()
 163         {
 164         }
 165
 166         virtual Module * CreateModule(InspIRCd* Me)
 167         {
 168                 return new ModuleRedirect(Me);
 169         }
 170
 171 };
 172
 173
 174 extern "C" void * init_module( void )
 175 {
 176         return new ModuleRedirectFactory;
 177 }
 178