1 #ifndef __LINUX_BRIDGE_EBT_802_3_H
2 #define __LINUX_BRIDGE_EBT_802_3_H
3
4 #define EBT_802_3_SAP 0x01
5 #define EBT_802_3_TYPE 0x02
6
7 #define EBT_802_3_MATCH "802_3"
8
9 /*
10 * If frame has DSAP/SSAP value 0xaa you must check the SNAP type
11 * to discover what kind of packet we're carrying.
12 */
13 #define CHECK_TYPE 0xaa
14
15 /*
16 * Control field may be one or two bytes. If the first byte has
17 * the value 0x03 then the entire length is one byte, otherwise it is two.
18 * One byte controls are used in Unnumbered Information frames.
19 * Two byte controls are used in Numbered Information frames.
20 */
21 #define IS_UI 0x03
22
23 #define EBT_802_3_MASK (EBT_802_3_SAP | EBT_802_3_TYPE | EBT_802_3)
24
25 /* ui has one byte ctrl, ni has two */
26 struct hdr_ui {
27 uint8_t dsap;
28 uint8_t ssap;
29 uint8_t ctrl;
30 uint8_t orig[3];
31 __be16 type;
32 };
33
34 struct hdr_ni {
35 uint8_t dsap;
36 uint8_t ssap;
37 __be16 ctrl;
38 uint8_t orig[3];
39 __be16 type;
40 };
41
42 struct ebt_802_3_hdr {
43 uint8_t daddr[6];
44 uint8_t saddr[6];
45 __be16 len;
46 union {
47 struct hdr_ui ui;
48 struct hdr_ni ni;
49 } llc;
50 };
51
52 #ifdef __KERNEL__
53 #include <linux/skbuff.h>
54
55 static inline struct ebt_802_3_hdr *ebt_802_3_hdr(const struct sk_buff *skb)
56 {
57 return (struct ebt_802_3_hdr *)skb_mac_header(skb);
58 }
59 #endif
60
61 struct ebt_802_3_info
62 {
63 uint8_t sap;
64 __be16 type;
65 uint8_t bitmask;
66 uint8_t invflags;
67 };
68
69 #endif
70
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