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 */
 55struct 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)
 69struct 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 */
 82struct 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 */
100struct br2684_filter {
101	__be32 prefix;		/* network byte order */
102	__be32 netmask;		/* 0 = disable filter */
103};
104
105struct br2684_filter_set {
106	struct br2684_if_spec ifspec;
107	struct br2684_filter filter;
108};
109
110enum 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 */