Contributors: 9
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Yasuyuki Kozakai |
226 |
44.84% |
1 |
4.00% |
| Jan Engelhardt |
147 |
29.17% |
13 |
52.00% |
| Harald Welte |
55 |
10.91% |
2 |
8.00% |
| Patrick McHardy |
48 |
9.52% |
3 |
12.00% |
| Arnaldo Carvalho de Melo |
12 |
2.38% |
2 |
8.00% |
| Art Haas |
8 |
1.59% |
1 |
4.00% |
| Linus Torvalds (pre-git) |
3 |
0.60% |
1 |
4.00% |
| Pablo Neira Ayuso |
3 |
0.60% |
1 |
4.00% |
| Thomas Gleixner |
2 |
0.40% |
1 |
4.00% |
| Total |
504 |
|
25 |
|
// SPDX-License-Identifier: GPL-2.0-only
/* IP tables module for matching the value of the IPv4/IPv6 DSCP field
*
* (C) 2002 by Harald Welte <laforge@netfilter.org>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <net/dsfield.h>
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter/xt_dscp.h>
MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
MODULE_DESCRIPTION("Xtables: DSCP/TOS field match");
MODULE_LICENSE("GPL");
MODULE_ALIAS("ipt_dscp");
MODULE_ALIAS("ip6t_dscp");
MODULE_ALIAS("ipt_tos");
MODULE_ALIAS("ip6t_tos");
static bool
dscp_mt(const struct sk_buff *skb, struct xt_action_param *par)
{
const struct xt_dscp_info *info = par->matchinfo;
u_int8_t dscp = ipv4_get_dsfield(ip_hdr(skb)) >> XT_DSCP_SHIFT;
return (dscp == info->dscp) ^ !!info->invert;
}
static bool
dscp_mt6(const struct sk_buff *skb, struct xt_action_param *par)
{
const struct xt_dscp_info *info = par->matchinfo;
u_int8_t dscp = ipv6_get_dsfield(ipv6_hdr(skb)) >> XT_DSCP_SHIFT;
return (dscp == info->dscp) ^ !!info->invert;
}
static int dscp_mt_check(const struct xt_mtchk_param *par)
{
const struct xt_dscp_info *info = par->matchinfo;
if (info->dscp > XT_DSCP_MAX)
return -EDOM;
return 0;
}
static bool tos_mt(const struct sk_buff *skb, struct xt_action_param *par)
{
const struct xt_tos_match_info *info = par->matchinfo;
if (xt_family(par) == NFPROTO_IPV4)
return ((ip_hdr(skb)->tos & info->tos_mask) ==
info->tos_value) ^ !!info->invert;
else
return ((ipv6_get_dsfield(ipv6_hdr(skb)) & info->tos_mask) ==
info->tos_value) ^ !!info->invert;
}
static struct xt_match dscp_mt_reg[] __read_mostly = {
{
.name = "dscp",
.family = NFPROTO_IPV4,
.checkentry = dscp_mt_check,
.match = dscp_mt,
.matchsize = sizeof(struct xt_dscp_info),
.me = THIS_MODULE,
},
{
.name = "dscp",
.family = NFPROTO_IPV6,
.checkentry = dscp_mt_check,
.match = dscp_mt6,
.matchsize = sizeof(struct xt_dscp_info),
.me = THIS_MODULE,
},
{
.name = "tos",
.revision = 1,
.family = NFPROTO_IPV4,
.match = tos_mt,
.matchsize = sizeof(struct xt_tos_match_info),
.me = THIS_MODULE,
},
{
.name = "tos",
.revision = 1,
.family = NFPROTO_IPV6,
.match = tos_mt,
.matchsize = sizeof(struct xt_tos_match_info),
.me = THIS_MODULE,
},
};
static int __init dscp_mt_init(void)
{
return xt_register_matches(dscp_mt_reg, ARRAY_SIZE(dscp_mt_reg));
}
static void __exit dscp_mt_exit(void)
{
xt_unregister_matches(dscp_mt_reg, ARRAY_SIZE(dscp_mt_reg));
}
module_init(dscp_mt_init);
module_exit(dscp_mt_exit);