1/*
2 * Copyright (c) 2014 Oracle and/or its affiliates. All Rights Reserved.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of
7 * the License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
17 */
18
19#include <sys/types.h>
20#include <sys/socket.h>
21#include <netinet/ip.h>
22#include <string.h>
23#include <unistd.h>
24#include <errno.h>
25
26int bound_socket(int domain, int type)
27{
28	int sock;
29	struct sockaddr_storage addr;
30	struct sockaddr_in *addr4 = (struct sockaddr_in *)&addr;
31	struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&addr;
32	socklen_t slen;
33
34	switch (domain) {
35	case AF_INET:
36		addr4->sin_family = AF_INET;
37		addr4->sin_port = 0;
38		addr4->sin_addr.s_addr = INADDR_ANY;
39		slen = sizeof(*addr4);
40		break;
41
42	case AF_INET6:
43		addr6->sin6_family = AF_INET6;
44		addr6->sin6_port = 0;
45		addr6->sin6_addr = in6addr_any;
46		slen = sizeof(*addr6);
47		break;
48
49	default:
50		errno = EAFNOSUPPORT;
51		return -1;
52	}
53
54	if ((type != SOCK_STREAM) && (type != SOCK_DGRAM)) {
55		errno = EINVAL;
56		return -1;
57	}
58
59	sock = socket(domain, type, 0);
60	if (sock < 0)
61		return -1;
62
63	if (bind(sock, (struct sockaddr *)&addr, slen) < 0) {
64		close(sock);
65		return -1;
66	}
67
68	return sock;
69}
70