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Dir : ~/usr/include/linux/netfilter_bridge/

Edit File: ebt_802_3.h

#ifndef __LINUX_BRIDGE_EBT_802_3_H
#define __LINUX_BRIDGE_EBT_802_3_H

#include <linux/types.h>

#define EBT_802_3_SAP 0x01
#define EBT_802_3_TYPE 0x02

#define EBT_802_3_MATCH "802_3"

/*
 * If frame has DSAP/SSAP value 0xaa you must check the SNAP type
 * to discover what kind of packet we're carrying. 
 */
#define CHECK_TYPE 0xaa

/*
 * Control field may be one or two bytes.  If the first byte has
 * the value 0x03 then the entire length is one byte, otherwise it is two.
 * One byte controls are used in Unnumbered Information frames.
 * Two byte controls are used in Numbered Information frames.
 */
#define IS_UI 0x03

#define EBT_802_3_MASK (EBT_802_3_SAP | EBT_802_3_TYPE | EBT_802_3)

/* ui has one byte ctrl, ni has two */
struct hdr_ui {
	__u8 dsap;
	__u8 ssap;
	__u8 ctrl;
	__u8 orig[3];
	__be16 type;
};

struct hdr_ni {
	__u8 dsap;
	__u8 ssap;
	__be16 ctrl;
	__u8  orig[3];
	__be16 type;
};

struct ebt_802_3_hdr {
	__u8  daddr[6];
	__u8  saddr[6];
	__be16 len;
	union {
		struct hdr_ui ui;
		struct hdr_ni ni;
	} llc;
};

struct ebt_802_3_info {
	__u8  sap;
	__be16 type;
	__u8  bitmask;
	__u8  invflags;
};

#endif /* __LINUX_BRIDGE_EBT_802_3_H */