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. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29#include <sys/param.h>
30#include <sys/ioctl.h>
31
32#include <net/if.h>
33#include <netinet/in.h>
34
35#include <errno.h>
36#include <ifaddrs.h>
37#include <string.h>
38#include <strings.h>
39
40#include "libifconfig.h"
41#include "libifconfig_internal.h"
42
43static const struct sockaddr_in NULL_SIN;
44
45static int
46inet_prefixlen(const struct in_addr *addr)
47{
48	int x;
49
50	x = ffs(ntohl(addr->s_addr));
51	return (x == 0 ? 0 : 33 - x);
52}
53
54int
55ifconfig_inet_get_addrinfo(ifconfig_handle_t *h __unused,
56    const char *name __unused, struct ifaddrs *ifa,
57    struct ifconfig_inet_addr *addr)
58{
59	bzero(addr, sizeof(*addr));
60
61	/* Set the address */
62	if (ifa->ifa_addr == NULL) {
63		return (-1);
64	} else {
65		addr->sin = (struct sockaddr_in *)ifa->ifa_addr;
66	}
67
68	/* Set the destination address */
69	if (ifa->ifa_flags & IFF_POINTOPOINT) {
70		if (ifa->ifa_dstaddr) {
71			addr->dst = (struct sockaddr_in *)ifa->ifa_dstaddr;
72		} else {
73			addr->dst = &NULL_SIN;
74		}
75	}
76
77	/* Set the netmask and prefixlen */
78	if (ifa->ifa_netmask) {
79		addr->netmask = (struct sockaddr_in *)ifa->ifa_netmask;
80	} else {
81		addr->netmask = &NULL_SIN;
82	}
83	addr->prefixlen = inet_prefixlen(&addr->netmask->sin_addr);
84
85	/* Set the broadcast */
86	if (ifa->ifa_flags & IFF_BROADCAST) {
87		addr->broadcast = (struct sockaddr_in *)ifa->ifa_broadaddr;
88	}
89
90	/* Set the vhid */
91	if (ifa->ifa_data) {
92		addr->vhid = ((struct if_data *)ifa->ifa_data)->ifi_vhid;
93	}
94
95	return (0);
96}
97