LXR linux/include/linux/netfilter_bridge/ebt_802

   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 */
  26struct hdr_ui {
  27        uint8_t dsap;
  28        uint8_t ssap;
  29        uint8_t ctrl;
  30        uint8_t orig[3];
  31        __be16 type;
  32};
  33
  34struct hdr_ni {
  35        uint8_t dsap;
  36        uint8_t ssap;
  37        __be16 ctrl;
  38        uint8_t  orig[3];
  39        __be16 type;
  40};
  41
  42struct 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
  55static 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
  61struct 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