[mirror_ubuntu-zesty-kernel.git] / include / linux / netfilter_bridge / 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;
};

#ifdef __KERNEL__
#include <linux/skbuff.h>

static inline struct ebt_802_3_hdr *ebt_802_3_hdr(const struct sk_buff *skb)
{
	return (struct ebt_802_3_hdr *)skb_mac_header(skb);
}
#endif

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

#endif
Commit	Line	Data
1da177e4 LT	1	#ifndef __LINUX_BRIDGE_EBT_802_3_H
	2	#define __LINUX_BRIDGE_EBT_802_3_H
	3
06988b06 JE	4	#include <linux/types.h>
06988b06 JE	5
1da177e4 LT	6	#define EBT_802_3_SAP 0x01
	7	#define EBT_802_3_TYPE 0x02
	8
	9	#define EBT_802_3_MATCH "802_3"
	10
	11	/*
	12	* If frame has DSAP/SSAP value 0xaa you must check the SNAP type
	13	* to discover what kind of packet we're carrying.
	14	*/
	15	#define CHECK_TYPE 0xaa
	16
	17	/*
	18	* Control field may be one or two bytes. If the first byte has
	19	* the value 0x03 then the entire length is one byte, otherwise it is two.
	20	* One byte controls are used in Unnumbered Information frames.
	21	* Two byte controls are used in Numbered Information frames.
	22	*/
	23	#define IS_UI 0x03
	24
	25	#define EBT_802_3_MASK (EBT_802_3_SAP \| EBT_802_3_TYPE \| EBT_802_3)
	26
	27	/* ui has one byte ctrl, ni has two */
	28	struct hdr_ui {
0260c1dc JE	29	__u8 dsap;
	30	__u8 ssap;
	31	__u8 ctrl;
	32	__u8 orig[3];
47c183fa	33	__be16 type;
1da177e4 LT	34	};
	35
	36	struct hdr_ni {
0260c1dc JE	37	__u8 dsap;
0260c1dc JE	38	__u8 ssap;
47c183fa	39	__be16 ctrl;
0260c1dc	40	__u8 orig[3];
47c183fa	41	__be16 type;
1da177e4 LT	42	};
	43
	44	struct ebt_802_3_hdr {
0260c1dc JE	45	__u8 daddr[6];
0260c1dc JE	46	__u8 saddr[6];
47c183fa	47	__be16 len;
1da177e4 LT	48	union {
	49	struct hdr_ui ui;
	50	struct hdr_ni ni;
	51	} llc;
	52	};
	53
	54	#ifdef __KERNEL__
	55	#include <linux/skbuff.h>
	56
	57	static inline struct ebt_802_3_hdr ebt_802_3_hdr(const struct sk_buff skb)
	58	{
98e399f8	59	return (struct ebt_802_3_hdr *)skb_mac_header(skb);
1da177e4 LT	60	}
	61	#endif
	62
d94d9fee	63	struct ebt_802_3_info {
0260c1dc	64	__u8 sap;
47c183fa	65	__be16 type;
0260c1dc JE	66	__u8 bitmask;
0260c1dc JE	67	__u8 invflags;
1da177e4 LT	68	};
	69
	70	#endif