117 lines
3.2 KiB
C
117 lines
3.2 KiB
C
/* $NetBSD: npfext_log.c,v 1.5 2018/09/29 14:41:37 rmind Exp $ */
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/*-
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* Copyright (c) 2012 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Mindaugas Rasiukevicius.
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: npfext_log.c,v 1.5 2018/09/29 14:41:37 rmind Exp $");
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <net/if.h>
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#include <stdio.h>
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#include <stdbool.h>
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#include <string.h>
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#include <assert.h>
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#include <errno.h>
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#include <err.h>
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#include <unistd.h>
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#include <npf.h>
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int npfext_log_init(void);
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nl_ext_t * npfext_log_construct(const char *);
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int npfext_log_param(nl_ext_t *, const char *, const char *);
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int
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npfext_log_init(void)
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{
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/* Nothing to initialise. */
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return 0;
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}
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nl_ext_t *
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npfext_log_construct(const char *name)
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{
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assert(strcmp(name, "log") == 0);
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return npf_ext_construct(name);
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}
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int
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npfext_log_param(nl_ext_t *ext, const char *param, const char *val __unused)
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{
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unsigned int if_idx;
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assert(param != NULL);
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if_idx = if_nametoindex(param);
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if (if_idx == 0) {
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int s;
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struct ifreq ifr;
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struct ifconf ifc;
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if ((s = socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
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warn("Can't create datagram socket for `%s'", param);
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return errno;
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}
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memset(&ifr, 0, sizeof(ifr));
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strlcpy(ifr.ifr_name, param, sizeof(ifr.ifr_name));
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if (ioctl(s, SIOCIFCREATE, &ifr) == -1) {
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warn("Can't SIOCIFCREATE `%s'", param);
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close(s);
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return errno;
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}
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memset(&ifc, 0, sizeof(ifc));
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strlcpy(ifr.ifr_name, param, sizeof(ifr.ifr_name));
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if (ioctl(s, SIOCGIFFLAGS, &ifr) == -1) {
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warn("Can't SIOCGIFFLAGS `%s'", param);
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close(s);
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return errno;
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}
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ifr.ifr_flags |= IFF_UP;
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if (ioctl(s, SIOCSIFFLAGS, &ifr) == -1) {
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warn("Can't SIOCSIFFLAGS `%s'", param);
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close(s);
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return errno;
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}
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close(s);
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if_idx = if_nametoindex(param);
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if (if_idx == 0)
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return EINVAL;
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}
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npf_ext_param_u32(ext, "log-interface", if_idx);
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return 0;
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}
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