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 */ 37