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 #include "s_newconf.h"
  37
  38 static const char userhost_desc[] =
  39         "Provides the USERHOST command to show a user's host";
  40
  41 static char buf[BUFSIZE];
  42
  43 static void m_userhost(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  44
  45 struct Message userhost_msgtab = {
  46         "USERHOST", 0, 0, 0, 0,
  47         {mg_unreg, {m_userhost, 2}, mg_ignore, mg_ignore, mg_ignore, {m_userhost, 2}}
  48 };
  49
  50 mapi_clist_av1 userhost_clist[] = { &userhost_msgtab, NULL };
  51
  52 DECLARE_MODULE_AV2(userhost, NULL, NULL, userhost_clist, NULL, NULL, NULL, NULL, userhost_desc);
  53
  54 /*
  55  * m_userhost added by Darren Reed 13/8/91 to aid clients and reduce
  56  * the need for complicated requests like WHOIS. It returns user/host
  57  * information only (no spurious AWAY labels or channels).
  58  */
  59 static void
  60 m_userhost(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  61 {
  62         struct Client *target_p;
  63         char response[NICKLEN * 2 + USERLEN + HOSTLEN + 30];
  64         char *t;
  65         int i;                  /* loop counter */
  66         int cur_len;
  67         int rl;
  68
  69         cur_len = sprintf(buf, form_str(RPL_USERHOST), me.name, source_p->name, "");
  70         t = buf + cur_len;
  71
  72         for (i = 1; i <= 5; i++)
  73         {
  74                 if(parc < i + 1)
  75                         break;
  76
  77                 if((target_p = find_person(parv[i])) != NULL)
  78                 {
  79                         /*
  80                          * Show real IP for USERHOST on yourself.
  81                          * This is needed for things like mIRC, which do a server-based
  82                          * lookup (USERHOST) to figure out what the clients' local IP
  83                          * is.  Useful for things like NAT, and dynamic dial-up users.
  84                          */
  85                         if(MyClient(target_p) && (target_p == source_p))
  86                         {
  87                                 rl = sprintf(response, "%s%s=%c%s@%s ",
  88                                                 target_p->name,
  89                                                 SeesOper(target_p, source_p) ? "*" : "",
  90                                                 (target_p->user->away) ? '-' : '+',
  91                                                 target_p->username,
  92                                                 target_p->sockhost);
  93                         }
  94                         else
  95                         {
  96                                 rl = sprintf(response, "%s%s=%c%s@%s ",
  97                                                 target_p->name,
  98                                                 SeesOper(target_p, source_p) ? "*" : "",
  99                                                 (target_p->user->away) ? '-' : '+',
 100                                                 target_p->username, target_p->host);
 101                         }
 102
 103                         if((rl + cur_len) < (BUFSIZE - 10))
 104                         {
 105                                 sprintf(t, "%s", response);
 106                                 t += rl;
 107                                 cur_len += rl;
 108                         }
 109                         else
 110                                 break;
 111                 }
 112         }
 113
 114         sendto_one(source_p, "%s", buf);
 115 }