LXR linux/include/linux/netfilter_ipv4/ipt

   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
  23struct 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