/* $NetBSD: npfext_log.c,v 1.5 2018/09/29 14:41:37 rmind Exp $ */
/*-
* Copyright (c) 2012 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Mindaugas Rasiukevicius.
*
* 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, this list 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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 <sys/cdefs.h>
__RCSID("$NetBSD: npfext_log.c,v 1.5 2018/09/29 14:41:37 rmind Exp $");
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <stdio.h>
#include <stdbool.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <err.h>
#include <unistd.h>
#include <npf.h>
int npfext_log_init(void);
nl_ext_t * npfext_log_construct(const char *);
int npfext_log_param(nl_ext_t *, const char *, const char *);
int
npfext_log_init(void)
{
/* Nothing to initialise. */
return 0;
}
nl_ext_t *
npfext_log_construct(const char *name)
{
assert(strcmp(name, "log") == 0);
return npf_ext_construct(name);
}
int
npfext_log_param(nl_ext_t *ext, const char *param, const char *val __unused)
{
unsigned int if_idx;
assert(param != NULL);
if_idx = if_nametoindex(param);
if (if_idx == 0) {
int s;
struct ifreq ifr;
struct ifconf ifc;
if ((s = socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
warn("Can't create datagram socket for `%s'", param);
return errno;
}
memset(&ifr, 0, sizeof(ifr));
strlcpy(ifr.ifr_name, param, sizeof(ifr.ifr_name));
if (ioctl(s, SIOCIFCREATE, &ifr) == -1) {
warn("Can't SIOCIFCREATE `%s'", param);
close(s);
return errno;
}
memset(&ifc, 0, sizeof(ifc));
strlcpy(ifr.ifr_name, param, sizeof(ifr.ifr_name));
if (ioctl(s, SIOCGIFFLAGS, &ifr) == -1) {
warn("Can't SIOCGIFFLAGS `%s'", param);
close(s);
return errno;
}
ifr.ifr_flags |= IFF_UP;
if (ioctl(s, SIOCSIFFLAGS, &ifr) == -1) {
warn("Can't SIOCSIFFLAGS `%s'", param);
close(s);
return errno;
}
close(s);
if_idx = if_nametoindex(param);
if (if_idx == 0)
return EINVAL;
}
npf_ext_param_u32(ext, "log-interface", if_idx);
return 0;
}