usr/src/cmd/cmd-inet/usr.bin/talk/get_addrs.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T     */
  28 /*        All Rights Reserved   */
  29
  30 /*
  31  * University Copyright- Copyright (c) 1982, 1986, 1988
  32  * The Regents of the University of California
  33  * All Rights Reserved
  34  *
  35  * University Acknowledgment- Portions of this document are derived from
  36  * software developed by the University of California, Berkeley, and its
  37  * contributors.
  38  */
  39
  40 #pragma ident   "%Z%%M% %I%     %E% SMI"
  41
  42 #include "talk_ctl.h"
  43 #include <locale.h>
  44
  45 #ifdef SYSV
  46 #define bcmp(a, b, c)   memcmp((a), (b), (c))
  47 #define bcopy(a, b, c)  memcpy((b), (a), (c))
  48 #endif /* SYSV */
  49
  50 struct hostent *gethostbyname();
  51 struct servent *getservbyname();
  52
  53 void
  54 get_addrs(my_machine_name, rem_machine_name)
  55 char *my_machine_name;
  56 char *rem_machine_name;
  57 {
  58         struct hostent *hp;
  59         struct servent *sp;
  60
  61         msg.pid = getpid();
  62
  63         /* look up the address of the local host */
  64
  65         hp = gethostbyname(my_machine_name);
  66
  67         if (hp == (struct hostent *) 0) {
  68                 fprintf(stderr,
  69                 gettext("This machine doesn't exist. Boy, am I confused!\n"));
  70                 exit(1);
  71         }
  72
  73         if (hp->h_addrtype != AF_INET) {
  74                 fprintf(stderr,
  75                 gettext("Protocol mix up with local machine address\n"));
  76                 exit(1);
  77         }
  78
  79         bcopy(hp->h_addr, (char *)&my_machine_addr, hp->h_length);
  80
  81         /* if on the same machine, then simply copy */
  82
  83         if (bcmp((char *)&rem_machine_name, (char *)&my_machine_name,
  84                 sizeof (rem_machine_name)) == 0) {
  85         bcopy((char *)&my_machine_addr, (char *)&rem_machine_addr,
  86                 sizeof (rem_machine_name));
  87         } else {
  88
  89                 if ((rem_machine_addr.s_addr =
  90                         (unsigned long)inet_addr(rem_machine_name)) == -1) {
  91
  92                 /* look up the address of the recipient's machine */
  93
  94                 hp = gethostbyname(rem_machine_name);
  95
  96                 if (hp == (struct hostent *) 0) {
  97                         fprintf(stderr,
  98                         gettext("%s is an unknown host\n"), rem_machine_name);
  99                         exit(1);
 100                 }
 101
 102                 if (hp->h_addrtype != AF_INET) {
 103                         fprintf(stderr,
 104                 gettext("Protocol mix up with remote machine address\n"));
 105                         exit(1);
 106                 }
 107
 108                 bcopy(hp->h_addr, (char *) &rem_machine_addr, hp->h_length);
 109         }
 110         }
 111
 112
 113         /* find the daemon portal */
 114
 115 #ifdef NTALK
 116         sp = getservbyname("ntalk", "udp");
 117 #else
 118         sp = getservbyname("talk", "udp");
 119 #endif
 120
 121         if (strcmp(sp->s_proto, "udp") != 0) {
 122         fprintf(stderr, gettext("Protocol mix up with talk daemon\n"));
 123         exit(1);
 124         }
 125
 126         if (sp == 0) {
 127                 p_error(
 128                 gettext("This machine doesn't support a tcp talk daemon"));
 129                 exit(1);
 130         }
 131
 132         daemon_port = sp->s_port;
 133 }