LXR linux/include/uapi/linux/netfilter_bridge/ebt_802

   1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2#ifndef _UAPI__LINUX_BRIDGE_EBT_802_3_H
   3#define _UAPI__LINUX_BRIDGE_EBT_802_3_H
   4
   5#include <linux/types.h>
   6#include <linux/if_ether.h>
   7
   8#define EBT_802_3_SAP 0x01
   9#define EBT_802_3_TYPE 0x02
  10
  11#define EBT_802_3_MATCH "802_3"
  12
  13/*
  14 * If frame has DSAP/SSAP value 0xaa you must check the SNAP type
  15 * to discover what kind of packet we're carrying. 
  16 */
  17#define CHECK_TYPE 0xaa
  18
  19/*
  20 * Control field may be one or two bytes.  If the first byte has
  21 * the value 0x03 then the entire length is one byte, otherwise it is two.
  22 * One byte controls are used in Unnumbered Information frames.
  23 * Two byte controls are used in Numbered Information frames.
  24 */
  25#define IS_UI 0x03
  26
  27#define EBT_802_3_MASK (EBT_802_3_SAP | EBT_802_3_TYPE | EBT_802_3)
  28
  29/* ui has one byte ctrl, ni has two */
  30struct hdr_ui {
  31        __u8 dsap;
  32        __u8 ssap;
  33        __u8 ctrl;
  34        __u8 orig[3];
  35        __be16 type;
  36};
  37
  38struct hdr_ni {
  39        __u8 dsap;
  40        __u8 ssap;
  41        __be16 ctrl;
  42        __u8  orig[3];
  43        __be16 type;
  44};
  45
  46struct ebt_802_3_hdr {
  47        __u8  daddr[ETH_ALEN];
  48        __u8  saddr[ETH_ALEN];
  49        __be16 len;
  50        union {
  51                struct hdr_ui ui;
  52                struct hdr_ni ni;
  53        } llc;
  54};
  55
  56
  57struct ebt_802_3_info {
  58        __u8  sap;
  59        __be16 type;
  60        __u8  bitmask;
  61        __u8  invflags;
  62};
  63
  64#endif /* _UAPI__LINUX_BRIDGE_EBT_802_3_H */
  65