src/commands/cmd_who.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2009 InspIRCd Development Team
   6  * See: http://wiki.inspircd.org/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
  16 /** Handle /WHO. These command handlers can be reloaded by the core,
  17  * and handle basic RFC1459 commands. Commands within modules work
  18  * the same way, however, they can be fully unloaded, where these
  19  * may not.
  20  */
  21 class CommandWho : public Command
  22 {
  23         bool CanView(Channel* chan, User* user);
  24         bool opt_viewopersonly;
  25         bool opt_showrealhost;
  26         bool opt_unlimit;
  27         bool opt_realname;
  28         bool opt_mode;
  29         bool opt_ident;
  30         bool opt_metadata;
  31         bool opt_port;
  32         bool opt_away;
  33         bool opt_local;
  34         bool opt_far;
  35         bool opt_time;
  36
  37  public:
  38         /** Constructor for who.
  39          */
  40         CommandWho ( Module* parent) : Command(parent,"WHO", 1) { Penalty = 2; syntax = "<server>|<nickname>|<channel>|<realname>|<host>|0 [ohurmMiaplf]"; }
  41         void SendWhoLine(User* user, const std::string &initial, Channel* ch, User* u, std::vector<std::string> &whoresults);
  42         /** Handle command.
  43          * @param parameters The parameters to the comamnd
  44          * @param pcnt The number of parameters passed to teh command
  45          * @param user The user issuing the command
  46          * @return A value from CmdResult to indicate command success or failure.
  47          */
  48         CmdResult Handle(const std::vector<std::string>& parameters, User *user);
  49         bool whomatch(User* cuser, User* user, const char* matchtext);
  50 };
  51
  52
  53 static const std::string star = "*";
  54
  55 static const std::string& get_first_visible_channel(User *u)
  56 {
  57         UCListIter i = u->chans.begin();
  58         while (i != u->chans.end())
  59         {
  60                 Channel* c = *i++;
  61                 if (!c->IsModeSet('s'))
  62                         return c->name;
  63         }
  64
  65         return star;
  66 }
  67
  68 bool CommandWho::whomatch(User* cuser, User* user, const char* matchtext)
  69 {
  70         bool match = false;
  71         bool positive = false;
  72
  73         if (user->registered != REG_ALL)
  74                 return false;
  75
  76         if (opt_local && !IS_LOCAL(user))
  77                 return false;
  78         else if (opt_far && IS_LOCAL(user))
  79                 return false;
  80
  81         if (opt_mode)
  82         {
  83                 for (const char* n = matchtext; *n; n++)
  84                 {
  85                         if (*n == '+')
  86                         {
  87                                 positive = true;
  88                                 continue;
  89                         }
  90                         else if (*n == '-')
  91                         {
  92                                 positive = false;
  93                                 continue;
  94                         }
  95                         if (user->IsModeSet(*n) != positive)
  96                                 return false;
  97                 }
  98                 return true;
  99         }
 100         else
 101         {
 102                 /*
 103                  * This was previously one awesome pile of ugly nested if, when really, it didn't need
 104                  * to be, since only one condition was ever checked, a chained if works just fine.
 105                  * -- w00t
 106                  */
 107                 if (opt_metadata)
 108                         match = user->GetExtList().find(matchtext) != user->GetExtList().end();
 109                 else if (opt_realname)
 110                         match = InspIRCd::Match(user->fullname, matchtext);
 111                 else if (opt_showrealhost)
 112                         match = InspIRCd::Match(user->host, matchtext, ascii_case_insensitive_map);
 113                 else if (opt_ident)
 114                         match = InspIRCd::Match(user->ident, matchtext, ascii_case_insensitive_map);
 115                 else if (opt_port)
 116                 {
 117                         irc::portparser portrange(matchtext, false);
 118                         long portno = -1;
 119                         while ((portno = portrange.GetToken()))
 120                                 if (portno == user->GetServerPort())
 121                                 {
 122                                         match = true;
 123                                         break;
 124                                 }
 125                 }
 126                 else if (opt_away)
 127                         match = InspIRCd::Match(user->awaymsg, matchtext);
 128                 else if (opt_time)
 129                 {
 130                         long seconds = ServerInstance->Duration(matchtext);
 131
 132                         // Okay, so time matching, we want all users connected `seconds' ago
 133                         if (user->age >= ServerInstance->Time() - seconds)
 134                                 match = true;
 135                 }
 136
 137                 /*
 138                  * Once the conditionals have been checked, only check dhost/nick/server
 139                  * if they didn't match this user -- and only match if we don't find a match.
 140                  *
 141                  * This should make things minutely faster, and again, less ugly.
 142                  * -- w00t
 143                  */
 144                 if (!match)
 145                         match = InspIRCd::Match(user->dhost, matchtext, ascii_case_insensitive_map);
 146
 147                 if (!match)
 148                         match = InspIRCd::Match(user->nick, matchtext);
 149
 150                 /* Don't allow server name matches if HideWhoisServer is enabled, unless the command user has the priv */
 151                 if (!match && (!*ServerInstance->Config->HideWhoisServer || cuser->HasPrivPermission("users/auspex")))
 152                         match = InspIRCd::Match(user->server, matchtext);
 153
 154                 return match;
 155         }
 156 }
 157
 158
 159
 160 bool CommandWho::CanView(Channel* chan, User* user)
 161 {
 162         if (!user || !chan)
 163                 return false;
 164
 165         /* Bug #383 - moved higher up the list, because if we are in the channel
 166          * we can see all its users
 167          */
 168         if (chan->HasUser(user))
 169                 return true;
 170         /* Opers see all */
 171         if (user->HasPrivPermission("users/auspex"))
 172                 return true;
 173         /* Cant see inside a +s or a +p channel unless we are a member (see above) */
 174         else if (!chan->IsModeSet('s') && !chan->IsModeSet('p'))
 175                 return true;
 176
 177         return false;
 178 }
 179
 180 void CommandWho::SendWhoLine(User* user, const std::string &initial, Channel* ch, User* u, std::vector<std::string> &whoresults)
 181 {
 182         const std::string& lcn = get_first_visible_channel(u);
 183         Channel* chlast = ServerInstance->FindChan(lcn);
 184
 185         std::string wholine =   initial + (ch ? ch->name : lcn) + " " + u->ident + " " + (opt_showrealhost ? u->host : u->dhost) + " " +
 186                                 ((*ServerInstance->Config->HideWhoisServer && !user->HasPrivPermission("servers/auspex")) ? ServerInstance->Config->HideWhoisServer : u->server) +
 187                                 " " + u->nick + " ";
 188
 189         /* away? */
 190         if (IS_AWAY(u))
 191         {
 192                 wholine.append("G");
 193         }
 194         else
 195         {
 196                 wholine.append("H");
 197         }
 198
 199         /* oper? */
 200         if (IS_OPER(u))
 201         {
 202                 wholine.append("*");
 203         }
 204
 205         wholine = wholine + (ch ? ch->GetPrefixChar(u) : (chlast ? chlast->GetPrefixChar(u) : "")) + " :0 " + u->fullname;
 206
 207         FOREACH_MOD(I_OnSendWhoLine, OnSendWhoLine(user, u, ch, wholine));
 208
 209         if (!wholine.empty())
 210                 whoresults.push_back(wholine);
 211 }
 212
 213 CmdResult CommandWho::Handle (const std::vector<std::string>& parameters, User *user)
 214 {
 215         /*
 216          * XXX - RFC says:
 217          *   The <name> passed to WHO is matched against users' host, server, real
 218          *   name and nickname
 219          * Currently, we support WHO #chan, WHO nick, WHO 0, WHO *, and the addition of a 'o' flag, as per RFC.
 220          */
 221
 222         /* WHO options */
 223         opt_viewopersonly = false;
 224         opt_showrealhost = false;
 225         opt_unlimit = false;
 226         opt_realname = false;
 227         opt_mode = false;
 228         opt_ident = false;
 229         opt_metadata = false;
 230         opt_port = false;
 231         opt_away = false;
 232         opt_local = false;
 233         opt_far = false;
 234         opt_time = false;
 235
 236         Channel *ch = NULL;
 237         std::vector<std::string> whoresults;
 238         std::string initial = "352 " + std::string(user->nick) + " ";
 239
 240         char matchtext[MAXBUF];
 241         bool usingwildcards = false;
 242
 243         /* Change '0' into '*' so the wildcard matcher can grok it */
 244         if (parameters[0] == "0")
 245                 strlcpy(matchtext, "*", MAXBUF);
 246         else
 247                 strlcpy(matchtext, parameters[0].c_str(), MAXBUF);
 248
 249         for (const char* check = matchtext; *check; check++)
 250         {
 251                 if (*check == '*' || *check == '?')
 252                 {
 253                         usingwildcards = true;
 254                         break;
 255                 }
 256         }
 257
 258         if (ServerInstance->FindServerName(matchtext))
 259                 usingwildcards = true;
 260
 261         if (parameters.size() > 1)
 262         {
 263                 /* Fix for bug #444, WHO flags count as a wildcard */
 264                 usingwildcards = true;
 265
 266                 for (std::string::const_iterator iter = parameters[1].begin(); iter != parameters[1].end(); ++iter)
 267                 {
 268                         switch (*iter)
 269                         {
 270                                 case 'o':
 271                                         opt_viewopersonly = true;
 272                                         break;
 273                                 case 'h':
 274                                         if (user->HasPrivPermission("users/auspex"))
 275                                                 opt_showrealhost = true;
 276                                         break;
 277                                 case 'u':
 278                                         if (user->HasPrivPermission("users/auspex"))
 279                                                 opt_unlimit = true;
 280                                         break;
 281                                 case 'r':
 282                                         opt_realname = true;
 283                                         break;
 284                                 case 'm':
 285                                         if (user->HasPrivPermission("users/auspex"))
 286                                                 opt_mode = true;
 287                                         break;
 288                                 case 'M':
 289                                         if (user->HasPrivPermission("users/auspex"))
 290                                                 opt_metadata = true;
 291                                         break;
 292                                 case 'i':
 293                                         opt_ident = true;
 294                                         break;
 295                                 case 'p':
 296                                         if (user->HasPrivPermission("users/auspex"))
 297                                                 opt_port = true;
 298                                         break;
 299                                 case 'a':
 300                                         opt_away = true;
 301                                         break;
 302                                 case 'l':
 303                                         if (user->HasPrivPermission("users/auspex") || !*ServerInstance->Config->HideWhoisServer)
 304                                                 opt_local = true;
 305                                         break;
 306                                 case 'f':
 307                                         if (user->HasPrivPermission("users/auspex") || !*ServerInstance->Config->HideWhoisServer)
 308                                                 opt_far = true;
 309                                         break;
 310                                 case 't':
 311                                         opt_time = true;
 312                                         break;
 313                         }
 314                 }
 315         }
 316
 317
 318         /* who on a channel? */
 319         ch = ServerInstance->FindChan(matchtext);
 320
 321         if (ch)
 322         {
 323                 if (CanView(ch,user))
 324                 {
 325                         bool inside = ch->HasUser(user);
 326
 327                         /* who on a channel. */
 328                         const UserMembList *cu = ch->GetUsers();
 329
 330                         for (UserMembCIter i = cu->begin(); i != cu->end(); i++)
 331                         {
 332                                 /* None of this applies if we WHO ourselves */
 333                                 if (user != i->first)
 334                                 {
 335                                         /* opers only, please */
 336                                         if (opt_viewopersonly && !IS_OPER(i->first))
 337                                                 continue;
 338
 339                                         /* If we're not inside the channel, hide +i users */
 340                                         if (i->first->IsModeSet('i') && !inside && !user->HasPrivPermission("users/auspex"))
 341                                                 continue;
 342                                 }
 343
 344                                 SendWhoLine(user, initial, ch, i->first, whoresults);
 345                         }
 346                 }
 347         }
 348         else
 349         {
 350                 /* Match against wildcard of nick, server or host */
 351                 if (opt_viewopersonly)
 352                 {
 353                         /* Showing only opers */
 354                         for (std::list<User*>::iterator i = ServerInstance->Users->all_opers.begin(); i != ServerInstance->Users->all_opers.end(); i++)
 355                         {
 356                                 User* oper = *i;
 357
 358                                 if (whomatch(user, oper, matchtext))
 359                                 {
 360                                         if (!user->SharesChannelWith(oper))
 361                                         {
 362                                                 if (usingwildcards && (!oper->IsModeSet('i')) && (!user->HasPrivPermission("users/auspex")))
 363                                                         continue;
 364                                         }
 365
 366                                         SendWhoLine(user, initial, NULL, oper, whoresults);
 367                                 }
 368                         }
 369                 }
 370                 else
 371                 {
 372                         for (user_hash::iterator i = ServerInstance->Users->clientlist->begin(); i != ServerInstance->Users->clientlist->end(); i++)
 373                         {
 374                                 if (whomatch(user, i->second, matchtext))
 375                                 {
 376                                         if (!user->SharesChannelWith(i->second))
 377                                         {
 378                                                 if (usingwildcards && (i->second->IsModeSet('i')) && (!user->HasPrivPermission("users/auspex")))
 379                                                         continue;
 380                                         }
 381
 382                                         SendWhoLine(user, initial, NULL, i->second, whoresults);
 383                                 }
 384                         }
 385                 }
 386         }
 387         /* Send the results out */
 388         if ((ServerInstance->Config->MaxWhoResults && (whoresults.size() <= (size_t)ServerInstance->Config->MaxWhoResults)) || opt_unlimit)
 389         {
 390                 for (std::vector<std::string>::const_iterator n = whoresults.begin(); n != whoresults.end(); n++)
 391                         user->WriteServ(*n);
 392                 user->WriteNumeric(315, "%s %s :End of /WHO list.",user->nick.c_str(), *parameters[0].c_str() ? parameters[0].c_str() : "*");
 393                 return CMD_SUCCESS;
 394         }
 395         else
 396         {
 397                 /* BZZT! Too many results. */
 398                 user->WriteNumeric(315, "%s %s :Too many results",user->nick.c_str(), parameters[0].c_str());
 399                 return CMD_FAILURE;
 400         }
 401 }
 402
 403 COMMAND_INIT(CommandWho)