1#ifndef __LINUX_BRIDGE_EBT_802_3_H
2#define __LINUX_BRIDGE_EBT_802_3_H
3
4#include <linux/types.h>
5
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 */
28struct hdr_ui {
29	__u8 dsap;
30	__u8 ssap;
31	__u8 ctrl;
32	__u8 orig[3];
33	__be16 type;
34};
35
36struct hdr_ni {
37	__u8 dsap;
38	__u8 ssap;
39	__be16 ctrl;
40	__u8  orig[3];
41	__be16 type;
42};
43
44struct ebt_802_3_hdr {
45	__u8  daddr[6];
46	__u8  saddr[6];
47	__be16 len;
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
57static inline struct ebt_802_3_hdr *ebt_802_3_hdr(const struct sk_buff *skb)
58{
59	return (struct ebt_802_3_hdr *)skb_mac_header(skb);
60}
61#endif
62
63struct ebt_802_3_info {
64	__u8  sap;
65	__be16 type;
66	__u8  bitmask;
67	__u8  invflags;
68};
69
70#endif
71