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