| 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
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| 2 | /* Header file for iptables ipt_ECN target |
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| 3 | * |
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| 4 | * (C) 2002 by Harald Welte <laforge@gnumonks.org> |
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| 5 | * |
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| 6 | * This software is distributed under GNU GPL v2, 1991 |
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| 7 | * |
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| 8 | * ipt_ECN.h,v 1.3 2002/05/29 12:17:40 laforge Exp |
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| 9 | */ |
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| 10 | #ifndef _IPT_ECN_TARGET_H |
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| 11 | #define _IPT_ECN_TARGET_H |
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| 12 | |
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| 13 | #include <linux/types.h> |
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| 14 | #include <linux/netfilter/xt_DSCP.h> |
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| 15 | |
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| 16 | #define IPT_ECN_IP_MASK (~XT_DSCP_MASK) |
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| 17 | |
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| 18 | #define IPT_ECN_OP_SET_IP 0x01 /* set ECN bits of IPv4 header */ |
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| 19 | #define IPT_ECN_OP_SET_ECE 0x10 /* set ECE bit of TCP header */ |
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| 20 | #define IPT_ECN_OP_SET_CWR 0x20 /* set CWR bit of TCP header */ |
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| 21 | |
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| 22 | #define IPT_ECN_OP_MASK 0xce |
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| 23 | |
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| 24 | struct ipt_ECN_info { |
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| 25 | __u8 operation; /* bitset of operations */ |
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| 26 | __u8 ip_ect; /* ECT codepoint of IPv4 header, pre-shifted */ |
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| 27 | union { |
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| 28 | struct { |
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| 29 | __u8 ece:1, cwr:1; /* TCP ECT bits */ |
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| 30 | } tcp; |
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| 31 | } proto; |
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| 32 | }; |
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| 33 | |
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| 34 | #endif /* _IPT_ECN_TARGET_H */ |
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| 35 | |
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