1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2/* atmsap.h - ATM Service Access Point addressing definitions */
3
4/* Written 1995-1999 by Werner Almesberger, EPFL LRC/ICA */
5
6
7#ifndef _LINUX_ATMSAP_H
8#define _LINUX_ATMSAP_H
9
10#include <linux/atmapi.h>
11
12/*
13 * BEGIN_xx and END_xx markers are used for automatic generation of
14 * documentation. Do not change them.
15 */
16
17
18/*
19 * Layer 2 protocol identifiers
20 */
21
22/* BEGIN_L2 */
23#define ATM_L2_NONE 0 /* L2 not specified */
24#define ATM_L2_ISO1745 0x01 /* Basic mode ISO 1745 */
25#define ATM_L2_Q291 0x02 /* ITU-T Q.291 (Rec. I.441) */
26#define ATM_L2_X25_LL 0x06 /* ITU-T X.25, link layer */
27#define ATM_L2_X25_ML 0x07 /* ITU-T X.25, multilink */
28#define ATM_L2_LAPB 0x08 /* Extended LAPB, half-duplex (Rec. T.71) */
29#define ATM_L2_HDLC_ARM 0x09 /* HDLC ARM (ISO/IEC 4335) */
30#define ATM_L2_HDLC_NRM 0x0a /* HDLC NRM (ISO/IEC 4335) */
31#define ATM_L2_HDLC_ABM 0x0b /* HDLC ABM (ISO/IEC 4335) */
32#define ATM_L2_ISO8802 0x0c /* LAN LLC (ISO/IEC 8802/2) */
33#define ATM_L2_X75 0x0d /* ITU-T X.75, SLP */
34#define ATM_L2_Q922 0x0e /* ITU-T Q.922 */
35#define ATM_L2_USER 0x10 /* user-specified */
36#define ATM_L2_ISO7776 0x11 /* ISO 7776 DTE-DTE */
37/* END_L2 */
38
39
40/*
41 * Layer 3 protocol identifiers
42 */
43
44/* BEGIN_L3 */
45#define ATM_L3_NONE 0 /* L3 not specified */
46#define ATM_L3_X25 0x06 /* ITU-T X.25, packet layer */
47#define ATM_L3_ISO8208 0x07 /* ISO/IEC 8208 */
48#define ATM_L3_X223 0x08 /* ITU-T X.223 | ISO/IEC 8878 */
49#define ATM_L3_ISO8473 0x09 /* ITU-T X.233 | ISO/IEC 8473 */
50#define ATM_L3_T70 0x0a /* ITU-T T.70 minimum network layer */
51#define ATM_L3_TR9577 0x0b /* ISO/IEC TR 9577 */
52#define ATM_L3_H310 0x0c /* ITU-T Recommendation H.310 */
53#define ATM_L3_H321 0x0d /* ITU-T Recommendation H.321 */
54#define ATM_L3_USER 0x10 /* user-specified */
55/* END_L3 */
56
57
58/*
59 * High layer identifiers
60 */
61
62/* BEGIN_HL */
63#define ATM_HL_NONE 0 /* HL not specified */
64#define ATM_HL_ISO 0x01 /* ISO */
65#define ATM_HL_USER 0x02 /* user-specific */
66#define ATM_HL_HLP 0x03 /* high layer profile - UNI 3.0 only */
67#define ATM_HL_VENDOR 0x04 /* vendor-specific application identifier */
68/* END_HL */
69
70
71/*
72 * ITU-T coded mode of operation
73 */
74
75/* BEGIN_IMD */
76#define ATM_IMD_NONE 0 /* mode not specified */
77#define ATM_IMD_NORMAL 1 /* normal mode of operation */
78#define ATM_IMD_EXTENDED 2 /* extended mode of operation */
79/* END_IMD */
80
81/*
82 * H.310 code points
83 */
84
85#define ATM_TT_NONE 0 /* terminal type not specified */
86#define ATM_TT_RX 1 /* receive only */
87#define ATM_TT_TX 2 /* send only */
88#define ATM_TT_RXTX 3 /* receive and send */
89
90#define ATM_MC_NONE 0 /* no multiplexing */
91#define ATM_MC_TS 1 /* transport stream (TS) */
92#define ATM_MC_TS_FEC 2 /* transport stream with forward error corr. */
93#define ATM_MC_PS 3 /* program stream (PS) */
94#define ATM_MC_PS_FEC 4 /* program stream with forward error corr. */
95#define ATM_MC_H221 5 /* ITU-T Rec. H.221 */
96
97/*
98 * SAP structures
99 */
100
101#define ATM_MAX_HLI 8 /* maximum high-layer information length */
102
103
104struct atm_blli {
105 unsigned char l2_proto; /* layer 2 protocol */
106 union {
107 struct {
108 unsigned char mode; /* mode of operation (ATM_IMD_xxx), 0 if */
109 /* absent */
110 unsigned char window; /* window size (k), 1-127 (0 to omit) */
111 } itu; /* ITU-T encoding */
112 unsigned char user; /* user-specified l2 information */
113 } l2;
114 unsigned char l3_proto; /* layer 3 protocol */
115 union {
116 struct {
117 unsigned char mode; /* mode of operation (ATM_IMD_xxx), 0 if */
118 /* absent */
119 unsigned char def_size; /* default packet size (log2), 4-12 (0 to */
120 /* omit) */
121 unsigned char window;/* packet window size, 1-127 (0 to omit) */
122 } itu; /* ITU-T encoding */
123 unsigned char user; /* user specified l3 information */
124 struct { /* if l3_proto = ATM_L3_H310 */
125 unsigned char term_type; /* terminal type */
126 unsigned char fw_mpx_cap; /* forward multiplexing capability */
127 /* only if term_type != ATM_TT_NONE */
128 unsigned char bw_mpx_cap; /* backward multiplexing capability */
129 /* only if term_type != ATM_TT_NONE */
130 } h310;
131 struct { /* if l3_proto = ATM_L3_TR9577 */
132 unsigned char ipi; /* initial protocol id */
133 unsigned char snap[5];/* IEEE 802.1 SNAP identifier */
134 /* (only if ipi == NLPID_IEEE802_1_SNAP) */
135 } tr9577;
136 } l3;
137} __ATM_API_ALIGN;
138
139
140struct atm_bhli {
141 unsigned char hl_type; /* high layer information type */
142 unsigned char hl_length; /* length (only if hl_type == ATM_HL_USER || */
143 /* hl_type == ATM_HL_ISO) */
144 unsigned char hl_info[ATM_MAX_HLI];/* high layer information */
145};
146
147
148#define ATM_MAX_BLLI 3 /* maximum number of BLLI elements */
149
150
151struct atm_sap {
152 struct atm_bhli bhli; /* local SAP, high-layer information */
153 struct atm_blli blli[ATM_MAX_BLLI] __ATM_API_ALIGN;
154 /* local SAP, low-layer info */
155};
156
157
158static __inline__ int blli_in_use(struct atm_blli blli)
159{
160 return blli.l2_proto || blli.l3_proto;
161}
162
163#endif