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
27#include <sys/ioctl.h>
28
29#include <net/if.h>
30
31#include <errno.h>
32#include <ifaddrs.h>
33#include <stdio.h>
34#include <stdlib.h>
35#include <unistd.h>
36
37#include "libifconfig.h" // Needed for ifconfig_errstate
38#include "libifconfig_internal.h"
39
40int
41ifconfig_getifaddrs(ifconfig_handle_t *h)
42{
43	int ret;
44
45	if (h->ifap == NULL) {
46		ret = getifaddrs(&h->ifap);
47		return (ret);
48	} else {
49		return (0);
50	}
51}
52
53int
54ifconfig_ioctlwrap(ifconfig_handle_t *h, const int addressfamily,
55    unsigned long request, void *data)
56{
57	int s;
58
59	if (ifconfig_socket(h, addressfamily, &s) != 0) {
60		return (-1);
61	}
62
63	if (ioctl(s, request, data) != 0) {
64		h->error.errtype = IOCTL;
65		h->error.ioctl_request = request;
66		h->error.errcode = errno;
67		return (-1);
68	}
69
70	return (0);
71}
72
73/*
74 * Function to get socket for the specified address family.
75 * If the socket doesn't already exist, attempt to create it.
76 */
77int
78ifconfig_socket(ifconfig_handle_t *h, const int addressfamily, int *s)
79{
80
81	if (addressfamily > AF_MAX) {
82		h->error.errtype = SOCKET;
83		h->error.errcode = EINVAL;
84		return (-1);
85	}
86
87	if (h->sockets[addressfamily] != -1) {
88		*s = h->sockets[addressfamily];
89		return (0);
90	}
91
92	/* We don't have a socket of that type available. Create one. */
93	h->sockets[addressfamily] = socket(addressfamily, SOCK_DGRAM, 0);
94	if (h->sockets[addressfamily] == -1) {
95		h->error.errtype = SOCKET;
96		h->error.errcode = errno;
97		return (-1);
98	}
99
100	*s = h->sockets[addressfamily];
101	return (0);
102}
103
104void
105ifconfig_error_clear(ifconfig_handle_t *h)
106{
107	h->error.errtype = OK;
108	h->error.errcode = 0;
109}
110
111void
112ifconfig_error(ifconfig_handle_t *h, ifconfig_errtype type, int error)
113{
114	h->error.errtype = type;
115	h->error.errcode = error;
116}
117