root/include/uapi/linux/netfilter_bridge/ebt_802_3.h

INCLUDED FROM

   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 */
  30 struct hdr_ui {
  31         __u8 dsap;
  32         __u8 ssap;
  33         __u8 ctrl;
  34         __u8 orig[3];
  35         __be16 type;
  36 };
  37 
  38 struct hdr_ni {
  39         __u8 dsap;
  40         __u8 ssap;
  41         __be16 ctrl;
  42         __u8  orig[3];
  43         __be16 type;
  44 };
  45 
  46 struct 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 
  57 struct 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 */