remote_cmds/talk.tproj/get_addrs.c

   1 /*
   2  * Copyright (c) 1983, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include <sys/cdefs.h>
  35
  36 #ifndef __APPLE__
  37 __FBSDID("$FreeBSD: src/usr.bin/talk/get_addrs.c,v 1.5 2001/12/11 23:51:14 markm Exp $");
  38
  39 #ifndef lint
  40 static const char sccsid[] = "@(#)get_addrs.c   8.1 (Berkeley) 6/6/93";
  41 #endif
  42 #endif /* __APPLE__ */
  43
  44 #include <err.h>
  45 #include <netdb.h>
  46 #include <string.h>
  47
  48 #include "talk.h"
  49 #include "talk_ctl.h"
  50
  51 void
  52 get_addrs(my_machine_name, his_machine_name)
  53         char *my_machine_name __unused, *his_machine_name;
  54 {
  55         struct hostent *hp;
  56         struct servent *sp;
  57
  58         msg.pid = htonl(getpid());
  59
  60         hp = gethostbyname(his_machine_name);
  61         if (hp == NULL)
  62                 errx(1, "%s: %s", his_machine_name, hstrerror(h_errno));
  63         bcopy(hp->h_addr, (char *) &his_machine_addr, hp->h_length);
  64         if (get_iface(&his_machine_addr, &my_machine_addr) == -1)
  65                 err(1, "failed to find my interface address");
  66         /* find the server's port */
  67         sp = getservbyname("ntalk", "udp");
  68         if (sp == 0)
  69                 errx(1, "ntalk/udp: service is not registered");
  70         daemon_port = sp->s_port;
  71 }