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 */
119