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The C and C++ Include Header Files

cat -n /usr/include/linux/atmbr2684.h

     1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
     2	#ifndef _LINUX_ATMBR2684_H
     3	#define _LINUX_ATMBR2684_H
     4	
     5	#include <linux/types.h>
     6	#include <linux/atm.h>
     7	#include <linux/if.h>		/* For IFNAMSIZ */
     8	
     9	/*
    10	 * Type of media we're bridging (ethernet, token ring, etc)  Currently only
    11	 * ethernet is supported
    12	 */
    13	#define BR2684_MEDIA_ETHERNET	(0)	/* 802.3 */
    14	#define BR2684_MEDIA_802_4	(1)	/* 802.4 */
    15	#define BR2684_MEDIA_TR		(2)	/* 802.5 - token ring */
    16	#define BR2684_MEDIA_FDDI	(3)
    17	#define BR2684_MEDIA_802_6	(4)	/* 802.6 */
    18	
    19						/* used only at device creation:  */
    20	#define BR2684_FLAG_ROUTED	(1<<16)	/* payload is routed, not bridged */
    21	
    22	/*
    23	 * Is there FCS inbound on this VC?  This currently isn't supported.
    24	 */
    25	#define BR2684_FCSIN_NO		(0)
    26	#define BR2684_FCSIN_IGNORE	(1)
    27	#define BR2684_FCSIN_VERIFY	(2)
    28	
    29	/*
    30	 * Is there FCS outbound on this VC?  This currently isn't supported.
    31	 */
    32	#define BR2684_FCSOUT_NO	(0)
    33	#define BR2684_FCSOUT_SENDZERO	(1)
    34	#define BR2684_FCSOUT_GENERATE	(2)
    35	
    36	/*
    37	 * Does this VC include LLC encapsulation?
    38	 */
    39	#define BR2684_ENCAPS_VC	(0)	/* VC-mux */
    40	#define BR2684_ENCAPS_LLC	(1)
    41	#define BR2684_ENCAPS_AUTODETECT (2)	/* Unsupported */
    42	
    43	/*
    44	 * Is this VC bridged or routed?
    45	 */
    46	
    47	#define BR2684_PAYLOAD_ROUTED   (0)
    48	#define BR2684_PAYLOAD_BRIDGED  (1)
    49	
    50	/*
    51	 * This is for the ATM_NEWBACKENDIF call - these are like socket families:
    52	 * the first element of the structure is the backend number and the rest
    53	 * is per-backend specific
    54	 */
    55	struct atm_newif_br2684 {
    56		atm_backend_t backend_num;	/* ATM_BACKEND_BR2684 */
    57		int media;		/* BR2684_MEDIA_*, flags in upper bits */
    58		char ifname[IFNAMSIZ];
    59		int mtu;
    60	};
    61	
    62	/*
    63	 * This structure is used to specify a br2684 interface - either by a
    64	 * positive integer (returned by ATM_NEWBACKENDIF) or the interfaces name
    65	 */
    66	#define BR2684_FIND_BYNOTHING	(0)
    67	#define BR2684_FIND_BYNUM	(1)
    68	#define BR2684_FIND_BYIFNAME	(2)
    69	struct br2684_if_spec {
    70		int method;		/* BR2684_FIND_* */
    71		union {
    72			char ifname[IFNAMSIZ];
    73			int devnum;
    74		} spec;
    75	};
    76	
    77	/*
    78	 * This is for the ATM_SETBACKEND call - these are like socket families:
    79	 * the first element of the structure is the backend number and the rest
    80	 * is per-backend specific
    81	 */
    82	struct atm_backend_br2684 {
    83		atm_backend_t backend_num;	/* ATM_BACKEND_BR2684 */
    84		struct br2684_if_spec ifspec;
    85		int fcs_in;		/* BR2684_FCSIN_* */
    86		int fcs_out;		/* BR2684_FCSOUT_* */
    87		int fcs_auto;		/* 1: fcs_{in,out} disabled if no FCS rx'ed */
    88		int encaps;		/* BR2684_ENCAPS_* */
    89		int has_vpiid;		/* 1: use vpn_id - Unsupported */
    90		__u8 vpn_id[7];
    91		int send_padding;	/* unsupported */
    92		int min_size;		/* we will pad smaller packets than this */
    93	};
    94	
    95	/*
    96	 * The BR2684_SETFILT ioctl is an experimental mechanism for folks
    97	 * terminating a large number of IP-only vcc's.  When netfilter allows
    98	 * efficient per-if in/out filters, this support will be removed
    99	 */
   100	struct br2684_filter {
   101		__be32 prefix;		/* network byte order */
   102		__be32 netmask;		/* 0 = disable filter */
   103	};
   104	
   105	struct br2684_filter_set {
   106		struct br2684_if_spec ifspec;
   107		struct br2684_filter filter;
   108	};
   109	
   110	enum br2684_payload {
   111		p_routed = BR2684_PAYLOAD_ROUTED,
   112		p_bridged = BR2684_PAYLOAD_BRIDGED,
   113	};
   114	
   115	#define BR2684_SETFILT	_IOW( 'a', ATMIOC_BACKEND + 0, \
   116					struct br2684_filter_set)
   117	
   118	#endif /* _LINUX_ATMBR2684_H */