src/commands/cmd_who.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2008 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 "inspircd.h"
  15 #include "wildcard.h"
  16 #include "commands/cmd_who.h"
  17
  18 static const char *get_first_visible_channel(User *u)
  19 {
  20         UCListIter i = u->chans.begin();
  21         if (i != u->chans.end())
  22         {
  23                 if (!i->first->IsModeSet('s'))
  24                         return i->first->name;
  25         }
  26
  27         return "*";
  28 }
  29
  30 bool CommandWho::whomatch(User* user, const char* matchtext)
  31 {
  32         bool realhost = false;
  33         bool realname = false;
  34         bool positive = true;
  35         bool metadata = false;
  36         bool ident = false;
  37         bool away = false;
  38         bool port = false;
  39         char* dummy = NULL;
  40
  41         if (user->registered != REG_ALL)
  42                 return false;
  43
  44         if (opt_local && !IS_LOCAL(user))
  45                 return false;
  46         else if (opt_far && IS_LOCAL(user))
  47                 return false;
  48
  49         if (opt_mode)
  50         {
  51                 for (const char* n = matchtext; *n; n++)
  52                 {
  53                         if (*n == '+')
  54                         {
  55                                 positive = true;
  56                                 continue;
  57                         }
  58                         else if (*n == '-')
  59                         {
  60                                 positive = false;
  61                                 continue;
  62                         }
  63                         if (user->IsModeSet(*n) != positive)
  64                                 return false;
  65                 }
  66                 return true;
  67         }
  68         else
  69         {
  70
  71                 if (opt_metadata)
  72                         metadata = user->GetExt(matchtext, dummy);
  73                 else
  74                 {
  75                         if (opt_realname)
  76                                 realname = match(user->fullname, matchtext);
  77                         else
  78                         {
  79                                 if (opt_showrealhost)
  80                                         realhost = match(user->host, matchtext);
  81                                 else
  82                                 {
  83                                         if (opt_ident)
  84                                                 ident = match(user->ident, matchtext);
  85                                         else
  86                                         {
  87                                                 if (opt_port)
  88                                                 {
  89                                                         irc::portparser portrange(matchtext, false);
  90                                                         long portno = -1;
  91                                                         while ((portno = portrange.GetToken()))
  92                                                                 if (portno == user->GetPort())
  93                                                                         port = true;
  94                                                 }
  95                                                 else
  96                                                 {
  97                                                         if (opt_away)
  98                                                                 away = match(user->awaymsg, matchtext);
  99                                                 }
 100                                         }
 101                                 }
 102                         }
 103                 }
 104                 return ((port) || (away) || (ident) || (metadata) || (realname) || (realhost) || (match(user->dhost, matchtext)) || (match(user->nick, matchtext)) || (match(user->server, matchtext)));
 105         }
 106 }
 107
 108
 109
 110 extern "C" DllExport Command* init_command(InspIRCd* Instance)
 111 {
 112         return new CommandWho(Instance);
 113 }
 114
 115 bool CommandWho::CanView(Channel* chan, User* user)
 116 {
 117         if (!user || !chan)
 118                 return false;
 119
 120         /* Bug #383 - moved higher up the list, because if we are in the channel
 121          * we can see all its users
 122          */
 123         if (chan->HasUser(user))
 124                 return true;
 125         /* Opers see all */
 126         if (IS_OPER(user))
 127                 return true;
 128         /* Cant see inside a +s or a +p channel unless we are a member (see above) */
 129         else if (!chan->IsModeSet('s') && !chan->IsModeSet('p'))
 130                 return true;
 131
 132         return false;
 133 }
 134
 135 void CommandWho::SendWhoLine(User* user, const std::string &initial, Channel* ch, User* u, std::vector<std::string> &whoresults)
 136 {
 137         /* Not visible to this user */
 138         if (u->Visibility && !u->Visibility->VisibleTo(user))
 139                 return;
 140
 141         std::string lcn = get_first_visible_channel(u);
 142         Channel* chlast = ServerInstance->FindChan(lcn);
 143
 144         std::string wholine =   initial + (ch ? ch->name : lcn) + " " + u->ident + " " + (opt_showrealhost ? u->host : u->dhost) + " " +
 145                                 ((*ServerInstance->Config->HideWhoisServer && !IS_OPER(user)) ? ServerInstance->Config->HideWhoisServer : u->server) +
 146                                 " " + u->nick + " ";
 147
 148         /* away? */
 149         if (IS_AWAY(u))
 150         {
 151                 wholine.append("G");
 152         }
 153         else
 154         {
 155                 wholine.append("H");
 156         }
 157
 158         /* oper? */
 159         if (IS_OPER(u))
 160         {
 161                 wholine.append("*");
 162         }
 163
 164         wholine = wholine + (ch ? ch->GetPrefixChar(u) : (chlast ? chlast->GetPrefixChar(u) : "")) + " :0 " + u->fullname;
 165         whoresults.push_back(wholine);
 166 }
 167
 168 CmdResult CommandWho::Handle (const char** parameters, int pcnt, User *user)
 169 {
 170         /*
 171          * XXX - RFC says:
 172          *   The <name> passed to WHO is matched against users' host, server, real
 173          *   name and nickname
 174          * Currently, we support WHO #chan, WHO nick, WHO 0, WHO *, and the addition of a 'o' flag, as per RFC.
 175          */
 176
 177         /* WHO options */
 178         opt_viewopersonly = false;
 179         opt_showrealhost = false;
 180         opt_unlimit = false;
 181         opt_realname = false;
 182         opt_mode = false;
 183         opt_ident = false;
 184         opt_metadata = false;
 185         opt_port = false;
 186         opt_away = false;
 187         opt_local = false;
 188         opt_far = false;
 189
 190         Channel *ch = NULL;
 191         std::vector<std::string> whoresults;
 192         std::string initial = "352 " + std::string(user->nick) + " ";
 193
 194         const char* matchtext = NULL;
 195         bool usingwildcards = false;
 196
 197         /* Change '0' into '*' so the wildcard matcher can grok it */
 198         matchtext = parameters[0];
 199         if (!strcmp(matchtext,"0"))
 200                 matchtext = "*";
 201
 202         for (const char* check = matchtext; *check; check++)
 203         {
 204                 if (*check == '*' || *check == '?')
 205                 {
 206                         usingwildcards = true;
 207                         break;
 208                 }
 209         }
 210
 211         if (pcnt > 1)
 212         {
 213                 /* parse flags */
 214                 const char *iter = parameters[1];
 215
 216                 /* Fix for bug #444, WHO flags count as a wildcard */
 217                 usingwildcards = true;
 218
 219                 while (*iter)
 220                 {
 221                         switch (*iter)
 222                         {
 223                                 case 'o':
 224                                         opt_viewopersonly = true;
 225                                 break;
 226                                 case 'h':
 227                                         if (IS_OPER(user))
 228                                                 opt_showrealhost = true;
 229                                 break;
 230                                 case 'u':
 231                                         if (IS_OPER(user))
 232                                                 opt_unlimit = true;
 233                                 break;
 234                                 case 'r':
 235                                         opt_realname = true;
 236                                 break;
 237                                 case 'm':
 238                                         opt_mode = true;
 239                                 break;
 240                                 case 'M':
 241                                         opt_metadata = true;
 242                                 break;
 243                                 case 'i':
 244                                         opt_ident = true;
 245                                 break;
 246                                 case 'p':
 247                                         opt_port = true;
 248                                 break;
 249                                 case 'a':
 250                                         opt_away = true;
 251                                 break;
 252                                 case 'l':
 253                                         opt_local = true;
 254                                 break;
 255                                 case 'f':
 256                                         opt_far = true;
 257                                 break;
 258                         }
 259
 260                         *iter++;
 261                 }
 262         }
 263
 264
 265         /* who on a channel? */
 266         ch = ServerInstance->FindChan(matchtext);
 267
 268         if (ch)
 269         {
 270                 if (CanView(ch,user))
 271                 {
 272                         bool inside = ch->HasUser(user);
 273
 274                         /* who on a channel. */
 275                         CUList *cu = ch->GetUsers();
 276
 277                         for (CUList::iterator i = cu->begin(); i != cu->end(); i++)
 278                         {
 279                                 /* None of this applies if we WHO ourselves */
 280                                 if (user != i->first)
 281                                 {
 282                                         /* opers only, please */
 283                                         if (opt_viewopersonly && !IS_OPER(i->first))
 284                                                 continue;
 285
 286                                         /* If we're not inside the channel, hide +i users */
 287                                         if (i->first->IsModeSet('i') && !inside && !IS_OPER(user))
 288                                                 continue;
 289                                 }
 290
 291                                 SendWhoLine(user, initial, ch, i->first, whoresults);
 292                         }
 293                 }
 294         }
 295         else
 296         {
 297                 /* Match against wildcard of nick, server or host */
 298                 if (opt_viewopersonly)
 299                 {
 300                         /* Showing only opers */
 301                         for (std::list<User*>::iterator i = ServerInstance->Users->all_opers.begin(); i != ServerInstance->Users->all_opers.end(); i++)
 302                         {
 303                                 User* oper = *i;
 304
 305                                 if (whomatch(oper, matchtext))
 306                                 {
 307                                         if (!user->SharesChannelWith(oper))
 308                                         {
 309                                                 if (usingwildcards && (!oper->IsModeSet('i')) && (!IS_OPER(user)))
 310                                                         continue;
 311                                         }
 312
 313                                         SendWhoLine(user, initial, NULL, oper, whoresults);
 314                                 }
 315                         }
 316                 }
 317                 else
 318                 {
 319                         for (user_hash::iterator i = ServerInstance->Users->clientlist->begin(); i != ServerInstance->Users->clientlist->end(); i++)
 320                         {
 321                                 if (whomatch(i->second, matchtext))
 322                                 {
 323                                         if (!user->SharesChannelWith(i->second))
 324                                         {
 325                                                 if (usingwildcards && (i->second->IsModeSet('i')) && (!IS_OPER(user)))
 326                                                         continue;
 327                                         }
 328
 329                                         SendWhoLine(user, initial, NULL, i->second, whoresults);
 330                                 }
 331                         }
 332                 }
 333         }
 334         /* Send the results out */
 335         if ((ServerInstance->Config->MaxWhoResults && (whoresults.size() <= (size_t)ServerInstance->Config->MaxWhoResults)) || opt_unlimit)
 336         {
 337                 for (std::vector<std::string>::const_iterator n = whoresults.begin(); n != whoresults.end(); n++)
 338                         user->WriteServ(*n);
 339                 user->WriteServ("315 %s %s :End of /WHO list.",user->nick, *parameters[0] ? parameters[0] : "*");
 340                 return CMD_SUCCESS;
 341         }
 342         else
 343         {
 344                 /* BZZT! Too many results. */
 345                 user->WriteServ("315 %s %s :Too many results",user->nick, parameters[0]);
 346                 return CMD_FAILURE;
 347         }
 348 }
 349