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share/examples/libifc/setmtu.c
| Property | Old Value | New Value |
|---|---|---|
| svn:eol-style | null | native \ No newline at end of property |
| svn:keywords | null | FreeBSD=%H \ No newline at end of property |
| svn:mime-type | null | text/plain \ No newline at end of property |
| /* | |||||
| * Copyright (c) 2016, 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. | |||||
| * | |||||
| * 3. Neither the name of the copyright holder nor the names of its contributors | |||||
| * may be used to endorse or promote products derived from this software without | |||||
| * specific prior written permission. | |||||
| * | |||||
| * 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. | |||||
| */ | |||||
| #include <err.h> | |||||
| #include <errno.h> | |||||
| #include <net/if.h> | |||||
| #include <sys/ioctl.h> | |||||
| #include <stdio.h> | |||||
| #include <stdlib.h> | |||||
| #include <string.h> | |||||
| #include <libifc.h> | |||||
| int main(int argc, char *argv[]) | |||||
| { | |||||
| if (argc != 3) { | |||||
| errx(EINVAL, "Invalid number of arguments." | |||||
| " First argument should be interface name, second argument" | |||||
| " should be the MTU to set."); | |||||
| } | |||||
| char *ifname, *ptr; | |||||
| int mtu; | |||||
| /* We have a static number of arguments. Therefore we can do it simple. */ | |||||
| ifname = strdup(argv[1]); | |||||
| mtu = (int)strtol(argv[2], &ptr, 10); | |||||
| printf("Interface name: %s\n", ifname); | |||||
| printf("New MTU: %d", mtu); | |||||
| libifc_handle_t *lifh = libifc_open(); | |||||
| if (libifc_set_mtu(lifh, ifname, mtu) == 0) { | |||||
| printf("Successfully changed MTU of %s to %d\n", ifname, mtu); | |||||
| libifc_close(lifh); | |||||
| lifh = NULL; | |||||
| free(ifname); | |||||
| return (0); | |||||
| } else { | |||||
| switch (libifc_err_errtype(lifh)) { | |||||
| case SOCKET: | |||||
| warnx("couldn't create socket. This shouldn't happen.\n"); | |||||
| break; | |||||
| case IOCTL: | |||||
| if (libifc_err_ioctlreq(lifh) == SIOCSIFMTU) { | |||||
| warnx("Failed to set MTU (SIOCSIFMTU)\n"); | |||||
| } else { | |||||
| warnx( | |||||
| "Failed to set MTU due to error in unexpected ioctl() call %lu. Error code: %i.\n", | |||||
| libifc_err_ioctlreq(lifh), | |||||
| libifc_err_errno(lifh)); | |||||
| } | |||||
| break; | |||||
| default: | |||||
| warnx( | |||||
| "Should basically never end up here in this example.\n"); | |||||
| break; | |||||
| } | |||||
| libifc_close(lifh); | |||||
| lifh = NULL; | |||||
| free(ifname); | |||||
| return (-1); | |||||
| } | |||||
| } | |||||