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The C and C++ Include Header Files

/usr/include/linux/netfilter_bridge/ebt_802_3.h


$ cat -n /usr/include/linux/netfilter_bridge/ebt_802_3.h

     1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
     2	#ifndef __LINUX_BRIDGE_EBT_802_3_H
     3	#define __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 /* __LINUX_BRIDGE_EBT_802_3_H */