Annotation of src/usr.bin/talk/get_addrs.c, Revision 1.7
1.7 ! tedu 1: /* $OpenBSD: get_addrs.c,v 1.6 2004/03/02 21:04:42 tedu Exp $ */
1.1 deraadt 2: /* $NetBSD: get_addrs.c,v 1.3 1994/12/09 02:14:14 jtc Exp $ */
3:
4: /*
5: * Copyright (c) 1983, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
1.5 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: #ifndef lint
34: #if 0
35: static char sccsid[] = "@(#)get_addrs.c 8.1 (Berkeley) 6/6/93";
36: #endif
1.7 ! tedu 37: static const char rcsid[] = "$OpenBSD: get_addrs.c,v 1.6 2004/03/02 21:04:42 tedu Exp $";
1.1 deraadt 38: #endif /* not lint */
39:
1.3 pjanzen 40: #include "talk.h"
1.1 deraadt 41: #include <netdb.h>
42: #include <stdio.h>
1.3 pjanzen 43: #include <unistd.h>
1.1 deraadt 44: #include "talk_ctl.h"
45:
1.3 pjanzen 46: void
1.1 deraadt 47: get_addrs(my_machine_name, his_machine_name)
48: char *my_machine_name, *his_machine_name;
49: {
50: struct hostent *hp;
51: struct servent *sp;
52:
53: msg.pid = htonl(getpid());
54: /* look up the address of the local host */
55: hp = gethostbyname(my_machine_name);
1.4 millert 56: if (hp == NULL)
57: errx(1, "%s: %s", my_machine_name, hstrerror(h_errno));
1.1 deraadt 58: bcopy(hp->h_addr, (char *)&my_machine_addr, hp->h_length);
59: /*
60: * If the callee is on-machine, just copy the
61: * network address, otherwise do a lookup...
62: */
63: if (strcmp(his_machine_name, my_machine_name)) {
64: hp = gethostbyname(his_machine_name);
1.4 millert 65: if (hp == NULL)
66: errx(1, "%s: %s", his_machine_name, hstrerror(h_errno));
1.1 deraadt 67: bcopy(hp->h_addr, (char *) &his_machine_addr, hp->h_length);
68: } else
69: his_machine_addr = my_machine_addr;
70: /* find the server's port */
71: sp = getservbyname("ntalk", "udp");
1.4 millert 72: if (sp == NULL)
73: errx(1, "ntalk/udp: service is not registered.");
1.1 deraadt 74: daemon_port = sp->s_port;
75: }