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: stable/12/lib/libifconfig/libifconfig_internal.c 329853 2018-02-23 03:11:43Z asomers $
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
42 int
ifconfig_getifaddrs(ifconfig_handle_t * h)43 ifconfig_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
55 int
ifconfig_ioctlwrap(ifconfig_handle_t * h,const int addressfamily,unsigned long request,void * data)56 ifconfig_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 */
79 int
ifconfig_socket(ifconfig_handle_t * h,const int addressfamily,int * s)80 ifconfig_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