2 * Copyright (c) 2017, Marie Helene Kvello-Aune
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9 * thislist of conditions and the following disclaimer.
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32 #include <sys/ioctl.h>
37 #include <libifconfig.h>
39 #include <net/if_vlan_var.h>
42 main(int argc, char *argv[])
44 char *ifname, *parentif;
45 unsigned short vlantag;
47 ifconfig_handle_t *lifh;
50 errx(EINVAL, "Invalid number of arguments."
51 " Should provide exactly three arguments: "
52 "INTERFACE, PARENT_INTERFACE and VLAN_TAG.");
55 /* We have a static number of arguments. Therefore we can do it simple. */
56 ifname = strdup(argv[1]);
57 parentif = strdup(argv[2]);
58 vlantag = strtonum(argv[3], 0, USHRT_MAX, &errstr);
61 errx(1, "VLAN_TAG must be between 0 and %i.\n", USHRT_MAX);
64 printf("Interface: %s\nNew VLAN tag: %i\n", ifname, vlantag);
66 lifh = ifconfig_open();
68 errx(ENOMEM, "Failed to open libifconfig handle.");
72 if (ifconfig_set_vlantag(lifh, ifname, parentif, vlantag) == 0) {
73 printf("Successfully changed vlan tag.\n");
81 switch (ifconfig_err_errtype(lifh)) {
83 warnx("couldn't create socket. This shouldn't happen.\n");
86 if (ifconfig_err_ioctlreq(lifh) == SIOCGETVLAN) {
87 warnx("Target interface isn't a VLAN interface.\n");
89 if (ifconfig_err_ioctlreq(lifh) == SIOCSETVLAN) {
91 "Couldn't change VLAN properties of interface.\n");
96 "This is a thorough example accommodating for temporary"
97 " 'not implemented yet' errors. That's likely what happened"
98 " now. If not, your guess is as good as mine. ;)"
99 " Error code: %d\n", ifconfig_err_errno(
104 ifconfig_close(lifh);