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 <err.h>
30 #include <errno.h>
31 #include <net/if.h>
32 #include <sys/ioctl.h>
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include <string.h>
36 #include <libifconfig.h>
37
38
39 int
main(int argc,char * argv[])40 main(int argc, char *argv[])
41 {
42 char *ifname, *ifactualname;
43 ifconfig_handle_t *lifh;
44
45 if (argc != 2) {
46 errx(EINVAL, "Invalid number of arguments."
47 " Only one argument is accepted, and it should be the name"
48 " of the interface to be created.");
49 }
50
51 /* We have a static number of arguments. Therefore we can do it simple. */
52 ifname = strdup(argv[1]);
53
54 printf("Requested interface name: %s\n", ifname);
55
56 lifh = ifconfig_open();
57 if (lifh == NULL) {
58 errx(ENOMEM, "Failed to open libifconfig handle.");
59 return (-1);
60 }
61
62 if (ifconfig_create_interface(lifh, ifname, &ifactualname) == 0) {
63 printf("Successfully created interface '%s'\n", ifactualname);
64 ifconfig_close(lifh);
65 lifh = NULL;
66 free(ifname);
67 free(ifactualname);
68 return (0);
69 }
70
71 switch (ifconfig_err_errtype(lifh)) {
72 case SOCKET:
73 warnx("couldn't create socket. This shouldn't happen.\n");
74 break;
75 case IOCTL:
76 if (ifconfig_err_ioctlreq(lifh) == SIOCIFCREATE2) {
77 warnx(
78 "Failed to create interface (SIOCIFCREATE2)\n");
79 }
80 break;
81 default:
82 warnx(
83 "This is a thorough example accommodating for temporary"
84 " 'not implemented yet' errors. That's likely what happened"
85 " now. If not, your guess is as good as mine. ;)"
86 " Error code: %d\n", ifconfig_err_errno(
87 lifh));
88 break;
89 }
90
91 ifconfig_close(lifh);
92 lifh = NULL;
93 free(ifname);
94 free(ifactualname);
95 return (-1);
96 }
97