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