modules/m_userhost.c

   1 /*
   2  *  ircd-ratbox: A slightly useful ircd.
   3  *  m_userhost.c: Shows a user's host.
   4  *
   5  *  Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
   6  *  Copyright (C) 1996-2002 Hybrid Development Team
   7  *  Copyright (C) 2002-2005 ircd-ratbox development team
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  22  *  USA
  23  *
  24  *  $Id: m_userhost.c 20702 2005-08-31 20:59:02Z leeh $
  25  */
  26
  27 #include "stdinc.h"
  28 #include "client.h"
  29 #include "ircd.h"
  30 #include "numeric.h"
  31 #include "s_serv.h"
  32 #include "send.h"
  33 #include "irc_string.h"
  34 #include "sprintf_irc.h"
  35 #include "msg.h"
  36 #include "parse.h"
  37 #include "modules.h"
  38 #include "s_conf.h"
  39
  40 static char buf[BUFSIZE];
  41
  42 static int m_userhost(struct Client *, struct Client *, int, const char **);
  43
  44 struct Message userhost_msgtab = {
  45         "USERHOST", 0, 0, 0, MFLG_SLOW,
  46         {mg_unreg, {m_userhost, 2}, mg_ignore, mg_ignore, mg_ignore, {m_userhost, 2}}
  47 };
  48
  49 mapi_clist_av1 userhost_clist[] = { &userhost_msgtab, NULL };
  50 DECLARE_MODULE_AV1(userhost, NULL, NULL, userhost_clist, NULL, NULL, "$Revision: 20702 $");
  51
  52 /*
  53  * m_userhost added by Darren Reed 13/8/91 to aid clients and reduce
  54  * the need for complicated requests like WHOIS. It returns user/host
  55  * information only (no spurious AWAY labels or channels).
  56  */
  57 static int
  58 m_userhost(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  59 {
  60         struct Client *target_p;
  61         char response[NICKLEN * 2 + USERLEN + HOSTLEN + 30];
  62         char *t;
  63         int i;                  /* loop counter */
  64         int cur_len;
  65         int rl;
  66
  67         cur_len = ircsprintf(buf, form_str(RPL_USERHOST), me.name, parv[0], "");
  68         t = buf + cur_len;
  69
  70         for (i = 1; i <= 5; i++)
  71         {
  72                 if(parc < i + 1)
  73                         break;
  74
  75                 if((target_p = find_person(parv[i])) != NULL)
  76                 {
  77                         /*
  78                          * Show real IP for USERHOST on yourself.
  79                          * This is needed for things like mIRC, which do a server-based
  80                          * lookup (USERHOST) to figure out what the clients' local IP
  81                          * is.  Useful for things like NAT, and dynamic dial-up users.
  82                          */
  83                         if(MyClient(target_p) && (target_p == source_p))
  84                         {
  85                                 rl = ircsprintf(response, "%s%s=%c%s@%s ",
  86                                                 target_p->name,
  87                                                 IsOper(target_p) ? "*" : "",
  88                                                 (target_p->user->away) ? '-' : '+',
  89                                                 target_p->username,
  90                                                 target_p->sockhost);
  91                         }
  92                         else
  93                         {
  94                                 rl = ircsprintf(response, "%s%s=%c%s@%s ",
  95                                                 target_p->name,
  96                                                 IsOper(target_p) ? "*" : "",
  97                                                 (target_p->user->away) ? '-' : '+',
  98                                                 target_p->username, target_p->host);
  99                         }
 100
 101                         if((rl + cur_len) < (BUFSIZE - 10))
 102                         {
 103                                 ircsprintf(t, "%s", response);
 104                                 t += rl;
 105                                 cur_len += rl;
 106                         }
 107                         else
 108                                 break;
 109                 }
 110         }
 111
 112         sendto_one(source_p, "%s", buf);
 113
 114         return 0;
 115 }