include/uapi/linux/netfilter_bridge/ebt_802_3.h

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