freebsd-dev/share/examples/libifconfig/ifchangevlan.c
Alan Somers b1d757bc1d libifconfig: multiple feature additions
Added the ability to:

* Create virtual interfaces
* Create vlan interfaces
* Get interface fib
* Get interface groups
* Get interface status
* Get nd6 info
* Get media status
* Get additional ifaddr info in a convenient struct
* Get vhids
* Get carp info
* Get lagg and laggport status
* Iterate over all interfaces and ifaddrs

And add more examples, too.

Note that this is a backwards-incompatible change. But that's ok, because it's
a private library.

MFC after:	3 weeks
Sponsored by:	Spectra Logic Corp
Differential Revision:	https://reviews.freebsd.org/D14463
2018-02-23 03:11:43 +00:00

110 lines
3.2 KiB
C

/*
* Copyright (c) 2017, Marie Helene Kvello-Aune
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* thislist of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <err.h>
#include <errno.h>
#include <net/if.h>
#include <sys/ioctl.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libifconfig.h>
#include <net/if_vlan_var.h>
int
main(int argc, char *argv[])
{
char *ifname, *parentif;
unsigned short vlantag;
const char *errstr;
ifconfig_handle_t *lifh;
if (argc != 4) {
errx(EINVAL, "Invalid number of arguments."
" Should provide exactly three arguments: "
"INTERFACE, PARENT_INTERFACE and VLAN_TAG.");
}
/* We have a static number of arguments. Therefore we can do it simple. */
ifname = strdup(argv[1]);
parentif = strdup(argv[2]);
vlantag = strtonum(argv[3], 0, USHRT_MAX, &errstr);
if (errstr != NULL) {
errx(1, "VLAN_TAG must be between 0 and %i.\n", USHRT_MAX);
}
printf("Interface: %s\nNew VLAN tag: %i\n", ifname, vlantag);
lifh = ifconfig_open();
if (lifh == NULL) {
errx(ENOMEM, "Failed to open libifconfig handle.");
return (-1);
}
if (ifconfig_set_vlantag(lifh, ifname, parentif, vlantag) == 0) {
printf("Successfully changed vlan tag.\n");
ifconfig_close(lifh);
lifh = NULL;
free(ifname);
free(parentif);
return (0);
}
switch (ifconfig_err_errtype(lifh)) {
case SOCKET:
warnx("couldn't create socket. This shouldn't happen.\n");
break;
case IOCTL:
if (ifconfig_err_ioctlreq(lifh) == SIOCGETVLAN) {
warnx("Target interface isn't a VLAN interface.\n");
}
if (ifconfig_err_ioctlreq(lifh) == SIOCSETVLAN) {
warnx(
"Couldn't change VLAN properties of interface.\n");
}
break;
default:
warnx(
"This is a thorough example accommodating for temporary"
" 'not implemented yet' errors. That's likely what happened"
" now. If not, your guess is as good as mine. ;)"
" Error code: %d\n", ifconfig_err_errno(
lifh));
break;
}
ifconfig_close(lifh);
lifh = NULL;
free(ifname);
free(parentif);
return (-1);
}