include/linux/netfilter_ipv4/ipt_ECN.h

   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 #include <linux/netfilter_ipv4/ipt_DSCP.h>
  12
  13 #define IPT_ECN_IP_MASK (~IPT_DSCP_MASK)
  14
  15 #define IPT_ECN_OP_SET_IP       0x01    /* set ECN bits of IPv4 header */
  16 #define IPT_ECN_OP_SET_ECE      0x10    /* set ECE bit of TCP header */
  17 #define IPT_ECN_OP_SET_CWR      0x20    /* set CWR bit of TCP header */
  18
  19 #define IPT_ECN_OP_MASK         0xce
  20
  21 struct ipt_ECN_info {
  22         u_int8_t operation;     /* bitset of operations */
  23         u_int8_t ip_ect;        /* ECT codepoint of IPv4 header, pre-shifted */
  24         union {
  25                 struct {
  26                         u_int8_t ece:1, cwr:1; /* TCP ECT bits */
  27                 } tcp;
  28         } proto;
  29 };
  30
  31 #endif /* _IPT_ECN_TARGET_H */