101 lines
2.8 KiB
C
101 lines
2.8 KiB
C
/* $NetBSD: npfext_normalize.c,v 1.1 2013/03/10 21:49:26 christos Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2012 The NetBSD Foundation, Inc.
|
|
* 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, 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_normalize.c,v 1.1 2013/03/10 21:49:26 christos Exp $");
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
|
|
#include <npf.h>
|
|
|
|
int npfext_normalize_init(void);
|
|
nl_ext_t * npfext_normalize_construct(const char *);
|
|
int npfext_normalize_param(nl_ext_t *, const char *, const char *);
|
|
|
|
int
|
|
npfext_normalize_init(void)
|
|
{
|
|
/* Nothing to initialize. */
|
|
return 0;
|
|
}
|
|
|
|
nl_ext_t *
|
|
npfext_normalize_construct(const char *name)
|
|
{
|
|
assert(strcmp(name, "normalize") == 0);
|
|
return npf_ext_construct(name);
|
|
}
|
|
|
|
int
|
|
npfext_normalize_param(nl_ext_t *ext, const char *param, const char *val)
|
|
{
|
|
enum ptype {
|
|
PARAM_BOOL,
|
|
PARAM_U32
|
|
};
|
|
static const struct param {
|
|
const char * name;
|
|
enum ptype type;
|
|
bool reqval;
|
|
} params[] = {
|
|
{ "random-id", PARAM_BOOL, false },
|
|
{ "no-df", PARAM_BOOL, false },
|
|
{ "min-ttl", PARAM_U32, true },
|
|
{ "max-mss", PARAM_U32, true },
|
|
};
|
|
|
|
for (unsigned i = 0; i < __arraycount(params); i++) {
|
|
const char *name = params[i].name;
|
|
|
|
if (strcmp(name, param) != 0) {
|
|
continue;
|
|
}
|
|
if (val == NULL && params[i].reqval) {
|
|
return EINVAL;
|
|
}
|
|
|
|
switch (params[i].type) {
|
|
case PARAM_BOOL:
|
|
npf_ext_param_bool(ext, name, true);
|
|
break;
|
|
case PARAM_U32:
|
|
npf_ext_param_u32(ext, name, atol(val));
|
|
break;
|
|
default:
|
|
assert(false);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Invalid parameter, if not found. */
|
|
return EINVAL;
|
|
}
|