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
  25 #include "stdinc.h"
  26 #include "client.h"
  27 #include "ircd.h"
  28 #include "numeric.h"
  29 #include "s_serv.h"
  30 #include "send.h"
  31 #include "match.h"
  32 #include "msg.h"
  33 #include "parse.h"
  34 #include "modules.h"
  35 #include "s_conf.h"
  36
  37 static const char userhost_desc[] =
  38         "Provides the USERHOST command to show a user's host";
  39
  40 static char buf[BUFSIZE];
  41
  42 static void m_userhost(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  43
  44 struct Message userhost_msgtab = {
  45         "USERHOST", 0, 0, 0, 0,
  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
  51 DECLARE_MODULE_AV2(userhost, NULL, NULL, userhost_clist, NULL, NULL, NULL, NULL, userhost_desc);
  52
  53 /*
  54  * m_userhost added by Darren Reed 13/8/91 to aid clients and reduce
  55  * the need for complicated requests like WHOIS. It returns user/host
  56  * information only (no spurious AWAY labels or channels).
  57  */
  58 static void
  59 m_userhost(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  60 {
  61         struct Client *target_p;
  62         char response[NICKLEN * 2 + USERLEN + HOSTLEN + 30];
  63         char *t;
  64         int i;                  /* loop counter */
  65         int cur_len;
  66         int rl;
  67
  68         cur_len = sprintf(buf, form_str(RPL_USERHOST), me.name, source_p->name, "");
  69         t = buf + cur_len;
  70
  71         for (i = 1; i <= 5; i++)
  72         {
  73                 if(parc < i + 1)
  74                         break;
  75
  76                 if((target_p = find_person(parv[i])) != NULL)
  77                 {
  78                         /*
  79                          * Show real IP for USERHOST on yourself.
  80                          * This is needed for things like mIRC, which do a server-based
  81                          * lookup (USERHOST) to figure out what the clients' local IP
  82                          * is.  Useful for things like NAT, and dynamic dial-up users.
  83                          */
  84                         if(MyClient(target_p) && (target_p == source_p))
  85                         {
  86                                 rl = sprintf(response, "%s%s=%c%s@%s ",
  87                                                 target_p->name,
  88                                                 IsOper(target_p) ? "*" : "",
  89                                                 (target_p->user->away) ? '-' : '+',
  90                                                 target_p->username,
  91                                                 target_p->sockhost);
  92                         }
  93                         else
  94                         {
  95                                 rl = sprintf(response, "%s%s=%c%s@%s ",
  96                                                 target_p->name,
  97                                                 IsOper(target_p) ? "*" : "",
  98                                                 (target_p->user->away) ? '-' : '+',
  99                                                 target_p->username, target_p->host);
 100                         }
 101
 102                         if((rl + cur_len) < (BUFSIZE - 10))
 103                         {
 104                                 sprintf(t, "%s", response);
 105                                 t += rl;
 106                                 cur_len += rl;
 107                         }
 108                         else
 109                                 break;
 110                 }
 111         }
 112
 113         sendto_one(source_p, "%s", buf);
 114 }