root/include/linux/netfilter_ipv4/ipt_ECN.h

INCLUDED FROM

/* Header file for iptables ipt_ECN target
 *
 * (C) 2002 by Harald Welte <laforge@gnumonks.org>
 *
 * This software is distributed under GNU GPL v2, 1991
 * 
 * ipt_ECN.h,v 1.3 2002/05/29 12:17:40 laforge Exp
*/
#ifndef _IPT_ECN_TARGET_H
#define _IPT_ECN_TARGET_H
#include <linux/netfilter_ipv4/ipt_DSCP.h>

#define IPT_ECN_IP_MASK (~IPT_DSCP_MASK)

#define IPT_ECN_OP_SET_IP       0x01    /* set ECN bits of IPv4 header */
#define IPT_ECN_OP_SET_ECE      0x10    /* set ECE bit of TCP header */
#define IPT_ECN_OP_SET_CWR      0x20    /* set CWR bit of TCP header */

#define IPT_ECN_OP_MASK         0xce

struct ipt_ECN_info {
        u_int8_t operation;     /* bitset of operations */
        u_int8_t ip_ect;        /* ECT codepoint of IPv4 header, pre-shifted */
        union {
                struct {
                        u_int8_t ece:1, cwr:1; /* TCP ECT bits */
                } tcp;
        } proto;
};

#endif /* _IPT_ECN_TARGET_H */