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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/* Header file for iptables ipt_ECN target
*
* (C) 2002 by Harald Welte <[email protected]>
*
* This software is distributed under GNU GPL v2, 1991
*
* ipt_ECN.h,v 1.3 2002/05/29 12:17:40 laforge Exp
*/
#ifndef _IPT_ECN_TARGET_H
#define _IPT_ECN_TARGET_H
#include <linux/types.h>
#include <linux/netfilter/xt_DSCP.h>
#define IPT_ECN_IP_MASK (~XT_DSCP_MASK)
#define IPT_ECN_OP_SET_IP 0x01 /* set ECN bits of IPv4 header */
#define IPT_ECN_OP_SET_ECE 0x10 /* set ECE bit of TCP header */
#define IPT_ECN_OP_SET_CWR 0x20 /* set CWR bit of TCP header */
#define IPT_ECN_OP_MASK 0xce
struct ipt_ECN_info {
__u8 operation; /* bitset of operations */
__u8 ip_ect; /* ECT codepoint of IPv4 header, pre-shifted */
union {
struct {
__u8 ece:1, cwr:1; /* TCP ECT bits */
} tcp;
} proto;
};
#endif /* _IPT_ECN_TARGET_H */