1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 /* iptables module for matching the ECN header in IPv4 and TCP header
3 *
4 * (C) 2002 Harald Welte <laforge@gnumonks.org>
5 *
6 * This software is distributed under GNU GPL v2, 1991
7 *
8 * ipt_ecn.h,v 1.4 2002/08/05 19:39:00 laforge Exp
9 */
10 #ifndef _XT_ECN_H
11 #define _XT_ECN_H
12
13 #include <linux/types.h>
14 #include <linux/netfilter/xt_dscp.h>
15
16 #define XT_ECN_IP_MASK (~XT_DSCP_MASK)
17
18 #define XT_ECN_OP_MATCH_IP 0x01
19 #define XT_ECN_OP_MATCH_ECE 0x10
20 #define XT_ECN_OP_MATCH_CWR 0x20
21
22 #define XT_ECN_OP_MATCH_MASK 0xce
23
24 /* match info */
25 struct xt_ecn_info {
26 __u8 operation;
27 __u8 invert;
28 __u8 ip_ect;
29 union {
30 struct {
31 __u8 ect;
32 } tcp;
33 } proto;
34 };
35
36 #endif /* _XT_ECN_H */