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 std::vector<std::string>& parameters, 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         char matchtext[MAXBUF];
 195         bool usingwildcards = false;
 196
 197         /* Change '0' into '*' so the wildcard matcher can grok it */
 198         if (parameters[0] == "0")
 199                 strlcpy(matchtext, "*", MAXBUF);
 200         else
 201                 strlcpy(matchtext, parameters[0].c_str(), MAXBUF);
 202
 203         for (const char* check = matchtext; *check; check++)
 204         {
 205                 if (*check == '*' || *check == '?')
 206                 {
 207                         usingwildcards = true;
 208                         break;
 209                 }
 210         }
 211
 212         if (ServerInstance->FindServerName(matchtext))
 213                 usingwildcards = true;
 214
 215         if (parameters.size() > 1)
 216         {
 217                 /* Fix for bug #444, WHO flags count as a wildcard */
 218                 usingwildcards = true;
 219
 220                 for (std::string::const_iterator iter = parameters[1].begin(); iter != parameters[1].end(); ++iter)
 221                 {
 222                         switch (*iter)
 223                         {
 224                                 case 'o':
 225                                         opt_viewopersonly = true;
 226                                 break;
 227                                 case 'h':
 228                                         if (IS_OPER(user))
 229                                                 opt_showrealhost = true;
 230                                 break;
 231                                 case 'u':
 232                                         if (IS_OPER(user))
 233                                                 opt_unlimit = true;
 234                                 break;
 235                                 case 'r':
 236                                         opt_realname = true;
 237                                 break;
 238                                 case 'm':
 239                                         opt_mode = true;
 240                                 break;
 241                                 case 'M':
 242                                         opt_metadata = true;
 243                                 break;
 244                                 case 'i':
 245                                         opt_ident = true;
 246                                 break;
 247                                 case 'p':
 248                                         opt_port = true;
 249                                 break;
 250                                 case 'a':
 251                                         opt_away = true;
 252                                 break;
 253                                 case 'l':
 254                                         opt_local = true;
 255                                 break;
 256                                 case 'f':
 257                                         opt_far = true;
 258                                 break;
 259                         }
 260                 }
 261         }
 262
 263
 264         /* who on a channel? */
 265         ch = ServerInstance->FindChan(matchtext);
 266
 267         if (ch)
 268         {
 269                 if (CanView(ch,user))
 270                 {
 271                         bool inside = ch->HasUser(user);
 272
 273                         /* who on a channel. */
 274                         CUList *cu = ch->GetUsers();
 275
 276                         for (CUList::iterator i = cu->begin(); i != cu->end(); i++)
 277                         {
 278                                 /* None of this applies if we WHO ourselves */
 279                                 if (user != i->first)
 280                                 {
 281                                         /* opers only, please */
 282                                         if (opt_viewopersonly && !IS_OPER(i->first))
 283                                                 continue;
 284
 285                                         /* If we're not inside the channel, hide +i users */
 286                                         if (i->first->IsModeSet('i') && !inside && !IS_OPER(user))
 287                                                 continue;
 288                                 }
 289
 290                                 SendWhoLine(user, initial, ch, i->first, whoresults);
 291                         }
 292                 }
 293         }
 294         else
 295         {
 296                 /* Match against wildcard of nick, server or host */
 297                 if (opt_viewopersonly)
 298                 {
 299                         /* Showing only opers */
 300                         for (std::list<User*>::iterator i = ServerInstance->Users->all_opers.begin(); i != ServerInstance->Users->all_opers.end(); i++)
 301                         {
 302                                 User* oper = *i;
 303
 304                                 if (whomatch(oper, matchtext))
 305                                 {
 306                                         if (!user->SharesChannelWith(oper))
 307                                         {
 308                                                 if (usingwildcards && (!oper->IsModeSet('i')) && (!IS_OPER(user)))
 309                                                         continue;
 310                                         }
 311
 312                                         SendWhoLine(user, initial, NULL, oper, whoresults);
 313                                 }
 314                         }
 315                 }
 316                 else
 317                 {
 318                         for (user_hash::iterator i = ServerInstance->Users->clientlist->begin(); i != ServerInstance->Users->clientlist->end(); i++)
 319                         {
 320                                 if (whomatch(i->second, matchtext))
 321                                 {
 322                                         if (!user->SharesChannelWith(i->second))
 323                                         {
 324                                                 if (usingwildcards && (i->second->IsModeSet('i')) && (!IS_OPER(user)))
 325                                                         continue;
 326                                         }
 327
 328                                         SendWhoLine(user, initial, NULL, i->second, whoresults);
 329                                 }
 330                         }
 331                 }
 332         }
 333         /* Send the results out */
 334         if ((ServerInstance->Config->MaxWhoResults && (whoresults.size() <= (size_t)ServerInstance->Config->MaxWhoResults)) || opt_unlimit)
 335         {
 336                 for (std::vector<std::string>::const_iterator n = whoresults.begin(); n != whoresults.end(); n++)
 337                         user->WriteServ(*n);
 338                 user->WriteNumeric(315, "%s %s :End of /WHO list.",user->nick, *parameters[0].c_str() ? parameters[0].c_str() : "*");
 339                 return CMD_SUCCESS;
 340         }
 341         else
 342         {
 343                 /* BZZT! Too many results. */
 344                 user->WriteNumeric(315, "%s %s :Too many results",user->nick, parameters[0].c_str());
 345                 return CMD_FAILURE;
 346         }
 347 }
 348