1/*
2 * Copyright (c) 2016-2017, Marie Helene Kvello-Aune
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * thislist of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation and/or
13 * other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
17 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 */
28
29#include <sys/ioctl.h>
30
31#include <net/if.h>
32
33#include <errno.h>
34#include <ifaddrs.h>
35#include <stdio.h>
36#include <stdlib.h>
37#include <unistd.h>
38
39#include "libifconfig.h" // Needed for ifconfig_errstate
40#include "libifconfig_internal.h"
41
42int
43ifconfig_getifaddrs(ifconfig_handle_t *h)
44{
45	int ret;
46
47	if (h->ifap == NULL) {
48		ret = getifaddrs(&h->ifap);
49		return (ret);
50	} else {
51		return (0);
52	}
53}
54
55int
56ifconfig_ioctlwrap(ifconfig_handle_t *h, const int addressfamily,
57    unsigned long request, void *data)
58{
59	int s;
60
61	if (ifconfig_socket(h, addressfamily, &s) != 0) {
62		return (-1);
63	}
64
65	if (ioctl(s, request, data) != 0) {
66		h->error.errtype = IOCTL;
67		h->error.ioctl_request = request;
68		h->error.errcode = errno;
69		return (-1);
70	}
71
72	return (0);
73}
74
75/*
76 * Function to get socket for the specified address family.
77 * If the socket doesn't already exist, attempt to create it.
78 */
79int
80ifconfig_socket(ifconfig_handle_t *h, const int addressfamily, int *s)
81{
82
83	if (addressfamily > AF_MAX) {
84		h->error.errtype = SOCKET;
85		h->error.errcode = EINVAL;
86		return (-1);
87	}
88
89	if (h->sockets[addressfamily] != -1) {
90		*s = h->sockets[addressfamily];
91		return (0);
92	}
93
94	/* We don't have a socket of that type available. Create one. */
95	h->sockets[addressfamily] = socket(addressfamily, SOCK_DGRAM, 0);
96	if (h->sockets[addressfamily] == -1) {
97		h->error.errtype = SOCKET;
98		h->error.errcode = errno;
99		return (-1);
100	}
101
102	*s = h->sockets[addressfamily];
103	return (0);
104}
105