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 */