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 * $FreeBSD$
30 */
31#include <sys/param.h>
32#include <sys/ioctl.h>
33
34#include <net/if.h>
35#include <netinet/in.h>
36
37#include <errno.h>
38#include <ifaddrs.h>
39#include <string.h>
40#include <strings.h>
41
42#include "libifconfig.h"
43#include "libifconfig_internal.h"
44
45static const struct sockaddr_in NULL_SIN;
46
47static int
48inet_prefixlen(const struct in_addr *addr)
49{
50	int x;
51
52	x = ffs(ntohl(addr->s_addr));
53	return (x == 0 ? 0 : 33 - x);
54}
55
56int
57ifconfig_inet_get_addrinfo(ifconfig_handle_t *h __unused,
58    const char *name __unused, struct ifaddrs *ifa,
59    struct ifconfig_inet_addr *addr)
60{
61	bzero(addr, sizeof(*addr));
62
63	/* Set the address */
64	if (ifa->ifa_addr == NULL) {
65		return (-1);
66	} else {
67		addr->sin = (struct sockaddr_in *)ifa->ifa_addr;
68	}
69
70	/* Set the destination address */
71	if (ifa->ifa_flags & IFF_POINTOPOINT) {
72		if (ifa->ifa_dstaddr) {
73			addr->dst = (struct sockaddr_in *)ifa->ifa_dstaddr;
74		} else {
75			addr->dst = &NULL_SIN;
76		}
77	}
78
79	/* Set the netmask and prefixlen */
80	if (ifa->ifa_netmask) {
81		addr->netmask = (struct sockaddr_in *)ifa->ifa_netmask;
82	} else {
83		addr->netmask = &NULL_SIN;
84	}
85	addr->prefixlen = inet_prefixlen(&addr->netmask->sin_addr);
86
87	/* Set the broadcast */
88	if (ifa->ifa_flags & IFF_BROADCAST) {
89		addr->broadcast = (struct sockaddr_in *)ifa->ifa_broadaddr;
90	}
91
92	/* Set the vhid */
93	if (ifa->ifa_data) {
94		addr->vhid = ((struct if_data *)ifa->ifa_data)->ifi_vhid;
95	}
96
97	return (0);
98}
99