You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
151 lines
3.7 KiB
151 lines
3.7 KiB
/* Shared library add-on to iptables for DSCP
|
|
*
|
|
* (C) 2000- 2002 by Matthew G. Marsh <mgm@paktronix.com>,
|
|
* Harald Welte <laforge@gnumonks.org>
|
|
*
|
|
* This program is distributed under the terms of GNU GPL v2, 1991
|
|
*
|
|
* libipt_DSCP.c borrowed heavily from libipt_TOS.c
|
|
*
|
|
* --set-class added by Iain Barnes
|
|
*/
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <xtables.h>
|
|
#include <linux/netfilter/xt_DSCP.h>
|
|
|
|
/* This is evil, but it's my code - HW*/
|
|
#include "dscp_helper.c"
|
|
|
|
enum {
|
|
O_SET_DSCP = 0,
|
|
O_SET_DSCP_CLASS,
|
|
F_SET_DSCP = 1 << O_SET_DSCP,
|
|
F_SET_DSCP_CLASS = 1 << O_SET_DSCP_CLASS,
|
|
};
|
|
|
|
static void DSCP_help(void)
|
|
{
|
|
printf(
|
|
"DSCP target options\n"
|
|
" --set-dscp value Set DSCP field in packet header to value\n"
|
|
" This value can be in decimal (ex: 32)\n"
|
|
" or in hex (ex: 0x20)\n"
|
|
" --set-dscp-class class Set the DSCP field in packet header to the\n"
|
|
" value represented by the DiffServ class value.\n"
|
|
" This class may be EF,BE or any of the CSxx\n"
|
|
" or AFxx classes.\n"
|
|
"\n"
|
|
" These two options are mutually exclusive !\n"
|
|
);
|
|
}
|
|
|
|
static const struct xt_option_entry DSCP_opts[] = {
|
|
{.name = "set-dscp", .id = O_SET_DSCP, .excl = F_SET_DSCP_CLASS,
|
|
.type = XTTYPE_UINT8, .min = 0, .max = XT_DSCP_MAX,
|
|
.flags = XTOPT_PUT,
|
|
XTOPT_POINTER(struct xt_DSCP_info, dscp)},
|
|
{.name = "set-dscp-class", .id = O_SET_DSCP_CLASS, .excl = F_SET_DSCP,
|
|
.type = XTTYPE_STRING},
|
|
XTOPT_TABLEEND,
|
|
};
|
|
|
|
static void DSCP_parse(struct xt_option_call *cb)
|
|
{
|
|
struct xt_DSCP_info *dinfo = cb->data;
|
|
|
|
xtables_option_parse(cb);
|
|
switch (cb->entry->id) {
|
|
case O_SET_DSCP_CLASS:
|
|
dinfo->dscp = class_to_dscp(cb->arg);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void DSCP_check(struct xt_fcheck_call *cb)
|
|
{
|
|
if (cb->xflags == 0)
|
|
xtables_error(PARAMETER_PROBLEM,
|
|
"DSCP target: Parameter --set-dscp is required");
|
|
}
|
|
|
|
static void
|
|
print_dscp(uint8_t dscp, int numeric)
|
|
{
|
|
printf(" 0x%02x", dscp);
|
|
}
|
|
|
|
static void DSCP_print(const void *ip, const struct xt_entry_target *target,
|
|
int numeric)
|
|
{
|
|
const struct xt_DSCP_info *dinfo =
|
|
(const struct xt_DSCP_info *)target->data;
|
|
printf(" DSCP set");
|
|
print_dscp(dinfo->dscp, numeric);
|
|
}
|
|
|
|
static void DSCP_save(const void *ip, const struct xt_entry_target *target)
|
|
{
|
|
const struct xt_DSCP_info *dinfo =
|
|
(const struct xt_DSCP_info *)target->data;
|
|
|
|
printf(" --set-dscp 0x%02x", dinfo->dscp);
|
|
}
|
|
|
|
|
|
static int DSCP_xlate(struct xt_xlate *xl,
|
|
const struct xt_xlate_tg_params *params)
|
|
{
|
|
const struct xt_DSCP_info *dinfo =
|
|
(struct xt_DSCP_info *)params->target->data;
|
|
|
|
xt_xlate_add(xl, "ip dscp set 0x%02x", dinfo->dscp);
|
|
return 1;
|
|
}
|
|
|
|
static int DSCP_xlate6(struct xt_xlate *xl,
|
|
const struct xt_xlate_tg_params *params)
|
|
{
|
|
const struct xt_DSCP_info *dinfo =
|
|
(struct xt_DSCP_info *)params->target->data;
|
|
|
|
xt_xlate_add(xl, "ip6 dscp set 0x%02x", dinfo->dscp);
|
|
return 1;
|
|
}
|
|
|
|
static struct xtables_target dscp_target[] = {
|
|
{
|
|
.family = NFPROTO_IPV4,
|
|
.name = "DSCP",
|
|
.version = XTABLES_VERSION,
|
|
.size = XT_ALIGN(sizeof(struct xt_DSCP_info)),
|
|
.userspacesize = XT_ALIGN(sizeof(struct xt_DSCP_info)),
|
|
.help = DSCP_help,
|
|
.print = DSCP_print,
|
|
.save = DSCP_save,
|
|
.x6_parse = DSCP_parse,
|
|
.x6_fcheck = DSCP_check,
|
|
.x6_options = DSCP_opts,
|
|
.xlate = DSCP_xlate,
|
|
},
|
|
{
|
|
.family = NFPROTO_IPV6,
|
|
.name = "DSCP",
|
|
.version = XTABLES_VERSION,
|
|
.size = XT_ALIGN(sizeof(struct xt_DSCP_info)),
|
|
.userspacesize = XT_ALIGN(sizeof(struct xt_DSCP_info)),
|
|
.help = DSCP_help,
|
|
.print = DSCP_print,
|
|
.save = DSCP_save,
|
|
.x6_parse = DSCP_parse,
|
|
.x6_fcheck = DSCP_check,
|
|
.x6_options = DSCP_opts,
|
|
.xlate = DSCP_xlate6,
|
|
},
|
|
};
|
|
|
|
void _init(void)
|
|
{
|
|
xtables_register_targets(dscp_target, ARRAY_SIZE(dscp_target));
|
|
}
|