1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2/* atm.h - general ATM declarations */
3
4/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
5
6
7/*
8 * WARNING: User-space programs should not #include <linux/atm.h> directly.
9 * Instead, #include <atm.h>
10 */
11
12#ifndef _LINUX_ATM_H
13#define _LINUX_ATM_H
14
15/*
16 * BEGIN_xx and END_xx markers are used for automatic generation of
17 * documentation. Do not change them.
18 */
19
20
21#include <linux/atmapi.h>
22#include <linux/atmsap.h>
23#include <linux/atmioc.h>
24#include <linux/types.h>
25
26
27/* general ATM constants */
28#define ATM_CELL_SIZE 53 /* ATM cell size incl. header */
29#define ATM_CELL_PAYLOAD 48 /* ATM payload size */
30#define ATM_AAL0_SDU 52 /* AAL0 SDU size */
31#define ATM_MAX_AAL34_PDU 65535 /* maximum AAL3/4 PDU payload */
32#define ATM_AAL5_TRAILER 8 /* AAL5 trailer size */
33#define ATM_MAX_AAL5_PDU 65535 /* maximum AAL5 PDU payload */
34#define ATM_MAX_CDV 9999 /* maximum (default) CDV */
35#define ATM_NOT_RSV_VCI 32 /* first non-reserved VCI value */
36
37#define ATM_MAX_VPI 255 /* maximum VPI at the UNI */
38#define ATM_MAX_VPI_NNI 4096 /* maximum VPI at the NNI */
39#define ATM_MAX_VCI 65535 /* maximum VCI */
40
41
42/* "protcol" values for the socket system call */
43#define ATM_NO_AAL 0 /* AAL not specified */
44#define ATM_AAL0 13 /* "raw" ATM cells */
45#define ATM_AAL1 1 /* AAL1 (CBR) */
46#define ATM_AAL2 2 /* AAL2 (VBR) */
47#define ATM_AAL34 3 /* AAL3/4 (data) */
48#define ATM_AAL5 5 /* AAL5 (data) */
49
50/*
51 * socket option name coding functions
52 *
53 * Note that __SO_ENCODE and __SO_LEVEL are somewhat a hack since the
54 * << 22 only reserves 9 bits for the level. On some architectures
55 * SOL_SOCKET is 0xFFFF, so that's a bit of a problem
56 */
57
58#define __SO_ENCODE(l,n,t) ((((l) & 0x1FF) << 22) | ((n) << 16) | \
59 sizeof(t))
60#define __SO_LEVEL_MATCH(c,m) (((c) >> 22) == ((m) & 0x1FF))
61#define __SO_NUMBER(c) (((c) >> 16) & 0x3f)
62#define __SO_SIZE(c) ((c) & 0x3fff)
63
64/*
65 * ATM layer
66 */
67
68#define SO_SETCLP __SO_ENCODE(SOL_ATM,0,int)
69 /* set CLP bit value - TODO */
70#define SO_CIRANGE __SO_ENCODE(SOL_ATM,1,struct atm_cirange)
71 /* connection identifier range; socket must be
72 bound or connected */
73#define SO_ATMQOS __SO_ENCODE(SOL_ATM,2,struct atm_qos)
74 /* Quality of Service setting */
75#define SO_ATMSAP __SO_ENCODE(SOL_ATM,3,struct atm_sap)
76 /* Service Access Point */
77#define SO_ATMPVC __SO_ENCODE(SOL_ATM,4,struct sockaddr_atmpvc)
78 /* "PVC" address (also for SVCs); get only */
79#define SO_MULTIPOINT __SO_ENCODE(SOL_ATM, 5, int)
80 /* make this vc a p2mp */
81
82
83/*
84 * Note @@@: since the socket layers don't really distinguish the control and
85 * the data plane but generally seems to be data plane-centric, any layer is
86 * about equally wrong for the SAP. If you have a better idea about this,
87 * please speak up ...
88 */
89
90
91/* ATM cell header (for AAL0) */
92
93/* BEGIN_CH */
94#define ATM_HDR_GFC_MASK 0xf0000000
95#define ATM_HDR_GFC_SHIFT 28
96#define ATM_HDR_VPI_MASK 0x0ff00000
97#define ATM_HDR_VPI_SHIFT 20
98#define ATM_HDR_VCI_MASK 0x000ffff0
99#define ATM_HDR_VCI_SHIFT 4
100#define ATM_HDR_PTI_MASK 0x0000000e
101#define ATM_HDR_PTI_SHIFT 1
102#define ATM_HDR_CLP 0x00000001
103/* END_CH */
104
105
106/* PTI codings */
107
108/* BEGIN_PTI */
109#define ATM_PTI_US0 0 /* user data cell, congestion not exp, SDU-type 0 */
110#define ATM_PTI_US1 1 /* user data cell, congestion not exp, SDU-type 1 */
111#define ATM_PTI_UCES0 2 /* user data cell, cong. experienced, SDU-type 0 */
112#define ATM_PTI_UCES1 3 /* user data cell, cong. experienced, SDU-type 1 */
113#define ATM_PTI_SEGF5 4 /* segment OAM F5 flow related cell */
114#define ATM_PTI_E2EF5 5 /* end-to-end OAM F5 flow related cell */
115#define ATM_PTI_RSV_RM 6 /* reserved for traffic control/resource mgmt */
116#define ATM_PTI_RSV 7 /* reserved */
117/* END_PTI */
118
119
120/*
121 * The following items should stay in linux/atm.h, which should be linked to
122 * netatm/atm.h
123 */
124
125/* Traffic description */
126
127#define ATM_NONE 0 /* no traffic */
128#define ATM_UBR 1
129#define ATM_CBR 2
130#define ATM_VBR 3
131#define ATM_ABR 4
132#define ATM_ANYCLASS 5 /* compatible with everything */
133
134#define ATM_MAX_PCR -1 /* maximum available PCR */
135
136struct atm_trafprm {
137 unsigned char traffic_class; /* traffic class (ATM_UBR, ...) */
138 int max_pcr; /* maximum PCR in cells per second */
139 int pcr; /* desired PCR in cells per second */
140 int min_pcr; /* minimum PCR in cells per second */
141 int max_cdv; /* maximum CDV in microseconds */
142 int max_sdu; /* maximum SDU in bytes */
143 /* extra params for ABR */
144 unsigned int icr; /* Initial Cell Rate (24-bit) */
145 unsigned int tbe; /* Transient Buffer Exposure (24-bit) */
146 unsigned int frtt : 24; /* Fixed Round Trip Time (24-bit) */
147 unsigned int rif : 4; /* Rate Increment Factor (4-bit) */
148 unsigned int rdf : 4; /* Rate Decrease Factor (4-bit) */
149 unsigned int nrm_pres :1; /* nrm present bit */
150 unsigned int trm_pres :1; /* rm present bit */
151 unsigned int adtf_pres :1; /* adtf present bit */
152 unsigned int cdf_pres :1; /* cdf present bit*/
153 unsigned int nrm :3; /* Max # of Cells for each forward RM cell (3-bit) */
154 unsigned int trm :3; /* Time between forward RM cells (3-bit) */
155 unsigned int adtf :10; /* ACR Decrease Time Factor (10-bit) */
156 unsigned int cdf :3; /* Cutoff Decrease Factor (3-bit) */
157 unsigned int spare :9; /* spare bits */
158};
159
160struct atm_qos {
161 struct atm_trafprm txtp; /* parameters in TX direction */
162 struct atm_trafprm rxtp __ATM_API_ALIGN;
163 /* parameters in RX direction */
164 unsigned char aal __ATM_API_ALIGN;
165};
166
167/* PVC addressing */
168
169#define ATM_ITF_ANY -1 /* "magic" PVC address values */
170#define ATM_VPI_ANY -1
171#define ATM_VCI_ANY -1
172#define ATM_VPI_UNSPEC -2
173#define ATM_VCI_UNSPEC -2
174
175
176struct sockaddr_atmpvc {
177 unsigned short sap_family; /* address family, AF_ATMPVC */
178 struct { /* PVC address */
179 short itf; /* ATM interface */
180 short vpi; /* VPI (only 8 bits at UNI) */
181 int vci; /* VCI (only 16 bits at UNI) */
182 } sap_addr __ATM_API_ALIGN; /* PVC address */
183};
184
185/* SVC addressing */
186
187#define ATM_ESA_LEN 20 /* ATM End System Address length */
188#define ATM_E164_LEN 12 /* maximum E.164 number length */
189
190#define ATM_AFI_DCC 0x39 /* DCC ATM Format */
191#define ATM_AFI_ICD 0x47 /* ICD ATM Format */
192#define ATM_AFI_E164 0x45 /* E.164 ATM Format */
193#define ATM_AFI_LOCAL 0x49 /* Local ATM Format */
194
195#define ATM_AFI_DCC_GROUP 0xBD /* DCC ATM Group Format */
196#define ATM_AFI_ICD_GROUP 0xC5 /* ICD ATM Group Format */
197#define ATM_AFI_E164_GROUP 0xC3 /* E.164 ATM Group Format */
198#define ATM_AFI_LOCAL_GROUP 0xC7 /* Local ATM Group Format */
199
200#define ATM_LIJ_NONE 0 /* no leaf-initiated join */
201#define ATM_LIJ 1 /* request joining */
202#define ATM_LIJ_RPJ 2 /* set to root-prompted join */
203#define ATM_LIJ_NJ 3 /* set to network join */
204
205
206struct sockaddr_atmsvc {
207 unsigned short sas_family; /* address family, AF_ATMSVC */
208 struct { /* SVC address */
209 unsigned char prv[ATM_ESA_LEN];/* private ATM address */
210 char pub[ATM_E164_LEN+1]; /* public address (E.164) */
211 /* unused addresses must be bzero'ed */
212 char lij_type; /* role in LIJ call; one of ATM_LIJ* */
213 __u32 lij_id; /* LIJ call identifier */
214 } sas_addr __ATM_API_ALIGN; /* SVC address */
215};
216
217
218static __inline__ int atmsvc_addr_in_use(struct sockaddr_atmsvc addr)
219{
220 return *addr.sas_addr.prv || *addr.sas_addr.pub;
221}
222
223
224static __inline__ int atmpvc_addr_in_use(struct sockaddr_atmpvc addr)
225{
226 return addr.sap_addr.itf || addr.sap_addr.vpi || addr.sap_addr.vci;
227}
228
229
230/*
231 * Some stuff for linux/sockios.h
232 */
233
234struct atmif_sioc {
235 int number;
236 int length;
237 void *arg;
238};
239
240
241typedef unsigned short atm_backend_t;
242#endif /* _LINUX_ATM_H */