src/modules/m_safelist.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 "configreader.h"
  23 #include "inspircd.h"
  24 #include "wildcard.h"
  25
  26 /** Holds a users m_safelist state
  27  */
  28 class ListData : public classbase
  29 {
  30  public:
  31         long list_start;
  32         long list_position;
  33         bool list_ended;
  34         const std::string glob;
  35
  36         ListData() : list_start(0), list_position(0), list_ended(false) {};
  37         ListData(long pos, time_t t, const std::string &pattern) : list_start(t), list_position(pos), list_ended(false), glob(pattern) {};
  38 };
  39
  40 /* $ModDesc: A module overriding /list, and making it safe - stop those sendq problems. */
  41
  42 typedef std::vector<userrec *> UserList;
  43 UserList listusers;    /* vector of people doing a /list */
  44 class ListTimer *timer;
  45
  46 /** To create a timer which recurs every second, we inherit from InspTimer.
  47  * InspTimer is only one-shot however, so at the end of each Tick() we simply
  48  * insert another of ourselves into the pending queue :)
  49  */
  50 class ListTimer : public InspTimer
  51 {
  52  private:
  53
  54         char buffer[MAXBUF];
  55         chanrec *chan;
  56         InspIRCd* ServerInstance;
  57         const std::string glob;
  58         size_t ServerNameSize;
  59
  60  public:
  61
  62         ListTimer(InspIRCd* Instance, long interval) : InspTimer(interval,Instance->Time()), ServerInstance(Instance)
  63         {
  64                 ServerNameSize = 4 + strlen(ServerInstance->Config->ServerName);
  65         }
  66
  67         virtual void Tick(time_t TIME)
  68         {
  69                 bool go_again = true;
  70
  71                 while (go_again)
  72                 {
  73                         go_again = false;
  74                         for (UserList::iterator iter = listusers.begin(); iter != listusers.end(); iter++)
  75                         {
  76                                 /*
  77                                  * What we do here:
  78                                  *  - Get where they are up to
  79                                  *  - If it's more than total number of channels, erase
  80                                  *    them from the iterator, set go_again to true
  81                                  *  - If not, spool more channels
  82                                  */
  83                                 userrec* u = (userrec*)(*iter);
  84                                 ListData* ld;
  85                                 u->GetExt("safelist_cache", ld);
  86                                 if ((size_t)ld->list_position > ServerInstance->chanlist.size())
  87                                 {
  88                                         u->Shrink("safelist_cache");
  89                                         DELETE(ld);
  90                                         listusers.erase(iter);
  91                                         go_again = true;
  92                                         break;
  93                                 }
  94
  95                                 ServerInstance->Log(DEBUG, "m_safelist.so: resuming spool of list to client %s at channel %ld", u->nick, ld->list_position);
  96                                 chan = NULL;
  97                                 /* Attempt to fill up to 25% the user's sendq with /LIST output */
  98                                 long amount_sent = 0;
  99                                 do
 100                                 {
 101                                         ServerInstance->Log(DEBUG,"Channel %ld",ld->list_position);
 102                                         if (!ld->list_position)
 103                                                 u->WriteServ("321 %s Channel :Users Name",u->nick);
 104                                         chan = ServerInstance->GetChannelIndex(ld->list_position);
 105                                         /* spool details */
 106                                         bool has_user = (chan && chan->HasUser(u));
 107                                         if ((chan) && (((!(chan->modes[CM_PRIVATE])) && (!(chan->modes[CM_SECRET]))) || (has_user)))
 108                                         {
 109                                                 bool display = match(chan->name, ld->glob.c_str());
 110                                                 long users = chan->GetUserCounter();
 111
 112                                                 if ((users) && (display))
 113                                                 {
 114                                                         int counter = snprintf(buffer, MAXBUF, "322 %s %s %ld :[+%s] %s",u->nick, chan->name, users, chan->ChanModes(has_user), chan->topic);
 115                                                         /* Increment total plus linefeed */
 116                                                         amount_sent += counter + ServerNameSize;
 117                                                         ServerInstance->Log(DEBUG, "m_safelist.so: Sent %ld of safe %ld / 4", amount_sent, u->sendqmax);
 118                                                         u->WriteServ(std::string(buffer));
 119                                                 }
 120                                         }
 121                                         else
 122                                         {
 123                                                 if (!chan)
 124                                                 {
 125                                                         if (!ld->list_ended)
 126                                                         {
 127                                                                 ld->list_ended = true;
 128                                                                 u->WriteServ("323 %s :End of channel list.",u->nick);
 129                                                         }
 130                                                 }
 131                                         }
 132
 133                                         ld->list_position++;
 134                                 }
 135                                 while ((chan != NULL) && (amount_sent < (u->sendqmax / 4)));
 136                         }
 137                 }
 138
 139                 if (listusers.size())
 140                 {
 141                         timer = new ListTimer(ServerInstance,1);
 142                         ServerInstance->Timers->AddTimer(timer);
 143                 }
 144                 else
 145                 {
 146                         timer = NULL;
 147                 }
 148         }
 149 };
 150
 151 class ModuleSafeList : public Module
 152 {
 153  public:
 154         ModuleSafeList(InspIRCd* Me) : Module::Module(Me)
 155         {
 156                 timer = NULL;
 157         }
 158
 159         virtual ~ModuleSafeList()
 160         {
 161                 if (timer)
 162                         ServerInstance->Timers->DelTimer(timer);
 163         }
 164
 165         virtual Version GetVersion()
 166         {
 167                 return Version(1,1,0,0,VF_VENDOR,API_VERSION);
 168         }
 169
 170         void Implements(char* List)
 171         {
 172                 List[I_OnPreCommand] = List[I_OnCleanup] = List[I_OnUserQuit] = List[I_On005Numeric] = 1;
 173         }
 174
 175         /*
 176          * OnPreCommand()
 177          *   Intercept the LIST command.
 178          */
 179         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
 180         {
 181                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
 182                 if (!validated)
 183                         return 0;
 184
 185                 if (command == "LIST")
 186                 {
 187                         return this->HandleList(parameters, pcnt, user);
 188                 }
 189                 return 0;
 190         }
 191
 192         /*
 193          * HandleList()
 194          *   Handle (override) the LIST command.
 195          */
 196         int HandleList(const char** parameters, int pcnt, userrec* user)
 197         {
 198                 /* First, let's check if the user is currently /list'ing */
 199                 ListData *ld;
 200                 user->GetExt("safelist_cache", ld);
 201
 202                 if (ld)
 203                 {
 204                         /* user is already /list'ing, we don't want to do shit. */
 205                         return 1;
 206                 }
 207
 208                 /* Work around mIRC suckyness. YOU SUCK, KHALED! */
 209                 if ((pcnt == 1) && (*parameters[0] == '<'))
 210                         pcnt = 0;
 211
 212                 time_t* last_list_time;
 213                 user->GetExt("safelist_last", last_list_time);
 214                 if (last_list_time)
 215                 {
 216                         if (ServerInstance->Time() < (*last_list_time)+60)
 217                         {
 218                                 user->WriteServ("NOTICE %s :*** Woah there, slow down a little, you can't /LIST so often!",user->nick);
 219                                 return 1;
 220                         }
 221
 222                         DELETE(last_list_time);
 223                         user->Shrink("safelist_last");
 224                 }
 225
 226                 /*
 227                  * start at channel 0! ;)
 228                  */
 229                 ld = new ListData(0,ServerInstance->Time(), pcnt ? parameters[0] : "*");
 230                 user->Extend("safelist_cache", ld);
 231                 listusers.push_back(user);
 232
 233                 time_t* llt = new time_t;
 234                 *llt = ServerInstance->Time();
 235                 user->Extend("safelist_last", llt);
 236
 237                 if (!timer)
 238                 {
 239                         timer = new ListTimer(ServerInstance,1);
 240                         ServerInstance->Timers->AddTimer(timer);
 241                 }
 242
 243                 return 1;
 244         }
 245
 246         virtual void OnCleanup(int target_type, void* item)
 247         {
 248                 if(target_type == TYPE_USER)
 249                 {
 250                         userrec* u = (userrec*)item;
 251                         ListData* ld;
 252                         u->GetExt("safelist_cache", ld);
 253                         if (ld)
 254                         {
 255                                 u->Shrink("safelist_cache");
 256                                 DELETE(ld);
 257                         }
 258                         for (UserList::iterator iter = listusers.begin(); iter != listusers.end(); iter++)
 259                         {
 260                                 userrec* u2 = (userrec*)(*iter);
 261                                 if (u2 == u)
 262                                 {
 263                                         listusers.erase(iter);
 264                                         break;
 265                                 }
 266                         }
 267                         time_t* last_list_time;
 268                         u->GetExt("safelist_last", last_list_time);
 269                         if (last_list_time)
 270                         {
 271                                 DELETE(last_list_time);
 272                                 u->Shrink("safelist_last");
 273                         }
 274                 }
 275         }
 276
 277         virtual void On005Numeric(std::string &output)
 278         {
 279                 output.append(" SAFELIST");
 280         }
 281
 282         virtual void OnUserQuit(userrec* user, const std::string &message)
 283         {
 284                 this->OnCleanup(TYPE_USER,user);
 285         }
 286
 287 };
 288
 289
 290 class ModuleSafeListFactory : public ModuleFactory
 291 {
 292  public:
 293         ModuleSafeListFactory()
 294         {
 295         }
 296
 297         ~ModuleSafeListFactory()
 298         {
 299         }
 300
 301         virtual Module * CreateModule(InspIRCd* Me)
 302         {
 303                 return new ModuleSafeList(Me);
 304         }
 305
 306 };
 307
 308 extern "C" void * init_module( void )
 309 {
 310         return new ModuleSafeListFactory;
 311 }