7fa282e616
It is hard to reason about the contents of 'ifr' at any given time as nearly every function sets random fields or pointers in this structure. Use local on-stack clean 'struct ifreq' for each function instead. Reviewed by: kp Differential Revision: https://reviews.freebsd.org/D40534 MFC after: 2 weeks
114 lines
2.8 KiB
C
114 lines
2.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2009 Hiroki Sato. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD$";
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#endif
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <net/if_gif.h>
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#include <net/route.h>
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#include <ctype.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <err.h>
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#include <errno.h>
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#include "ifconfig.h"
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#define GIFBITS "\020\2IGNORE_SOURCE"
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static void
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gif_status(if_ctx *ctx)
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{
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int opts;
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struct ifreq ifr = { .ifr_data = (caddr_t)&opts };
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if (ioctl_ctx_ifr(ctx, GIFGOPTS, &ifr) == -1)
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return;
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if (opts == 0)
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return;
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printb("\toptions", opts, GIFBITS);
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putchar('\n');
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}
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static void
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setgifopts(if_ctx *ctx, const char *val __unused, int d)
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{
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int opts;
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struct ifreq ifr = { .ifr_data = (caddr_t)&opts };
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if (ioctl_ctx_ifr(ctx, GIFGOPTS, &ifr) == -1) {
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warn("ioctl(GIFGOPTS)");
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return;
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}
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if (d < 0)
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opts &= ~(-d);
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else
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opts |= d;
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if (ioctl_ctx(ctx, GIFSOPTS, &ifr) == -1) {
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warn("ioctl(GIFSOPTS)");
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return;
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}
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}
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static struct cmd gif_cmds[] = {
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DEF_CMD("ignore_source", GIF_IGNORE_SOURCE, setgifopts),
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DEF_CMD("-ignore_source", -GIF_IGNORE_SOURCE, setgifopts),
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};
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static struct afswtch af_gif = {
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.af_name = "af_gif",
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.af_af = AF_UNSPEC,
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.af_other_status = gif_status,
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};
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static __constructor void
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gif_ctor(void)
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{
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size_t i;
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for (i = 0; i < nitems(gif_cmds); i++)
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cmd_register(&gif_cmds[i]);
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af_register(&af_gif);
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}
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