ipt_ECN.h

 1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 2/* Header file for iptables ipt_ECN target
 3 *
 4 * (C) 2002 by Harald Welte <laforge@gnumonks.org>
 5 *
 6 * This software is distributed under GNU GPL v2, 1991
 7 * 
 8 * ipt_ECN.h,v 1.3 2002/05/29 12:17:40 laforge Exp
 9*/
10#ifndef _IPT_ECN_TARGET_H
11#define _IPT_ECN_TARGET_H
12
13#include <linux/types.h>
14#include <linux/netfilter/xt_DSCP.h>
15
16#define IPT_ECN_IP_MASK	(~XT_DSCP_MASK)
17
18#define IPT_ECN_OP_SET_IP	0x01	/* set ECN bits of IPv4 header */
19#define IPT_ECN_OP_SET_ECE	0x10	/* set ECE bit of TCP header */
20#define IPT_ECN_OP_SET_CWR	0x20	/* set CWR bit of TCP header */
21
22#define IPT_ECN_OP_MASK		0xce
23
24struct ipt_ECN_info {
25	__u8 operation;	/* bitset of operations */
26	__u8 ip_ect;	/* ECT codepoint of IPv4 header, pre-shifted */
27	union {
28		struct {
29			__u8 ece:1, cwr:1; /* TCP ECT bits */
30		} tcp;
31	} proto;
32};
33
34#endif /* _IPT_ECN_TARGET_H */