Annotation of src/usr.bin/talk/get_addrs.c, Revision 1.9
1.9 ! tedu 1: /* $OpenBSD: get_addrs.c,v 1.8 2009/10/27 23:59:44 deraadt 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:
1.3 pjanzen 33: #include "talk.h"
1.1 deraadt 34: #include <netdb.h>
35: #include <stdio.h>
1.3 pjanzen 36: #include <unistd.h>
1.1 deraadt 37: #include "talk_ctl.h"
38:
1.3 pjanzen 39: void
1.9 ! tedu 40: get_addrs(char *my_machine_name, char *his_machine_name)
1.1 deraadt 41: {
42: struct hostent *hp;
43: struct servent *sp;
44:
45: msg.pid = htonl(getpid());
46: /* look up the address of the local host */
47: hp = gethostbyname(my_machine_name);
1.4 millert 48: if (hp == NULL)
49: errx(1, "%s: %s", my_machine_name, hstrerror(h_errno));
1.9 ! tedu 50: bcopy(hp->h_addr, &my_machine_addr, hp->h_length);
1.1 deraadt 51: /*
52: * If the callee is on-machine, just copy the
53: * network address, otherwise do a lookup...
54: */
55: if (strcmp(his_machine_name, my_machine_name)) {
56: hp = gethostbyname(his_machine_name);
1.4 millert 57: if (hp == NULL)
58: errx(1, "%s: %s", his_machine_name, hstrerror(h_errno));
1.9 ! tedu 59: bcopy(hp->h_addr, &his_machine_addr, hp->h_length);
1.1 deraadt 60: } else
61: his_machine_addr = my_machine_addr;
62: /* find the server's port */
63: sp = getservbyname("ntalk", "udp");
1.4 millert 64: if (sp == NULL)
65: errx(1, "ntalk/udp: service is not registered.");
1.1 deraadt 66: daemon_port = sp->s_port;
67: }