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
43 static const struct sockaddr_in NULL_SIN;
44
45 static int
inet_prefixlen(const struct in_addr * addr)46 inet_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
54 int
ifconfig_inet_get_addrinfo(ifconfig_handle_t * h __unused,const char * name __unused,struct ifaddrs * ifa,struct ifconfig_inet_addr * addr)55 ifconfig_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