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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 
136 struct 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 
160 struct 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 
176 struct 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 
206 struct 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 
atmsvc_addr_in_use(struct sockaddr_atmsvc addr)218 static __inline__ int atmsvc_addr_in_use(struct sockaddr_atmsvc addr)
219 {
220 	return *addr.sas_addr.prv || *addr.sas_addr.pub;
221 }
222 
223 
atmpvc_addr_in_use(struct sockaddr_atmpvc addr)224 static __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 
234 struct atmif_sioc {
235 	int number;
236 	int length;
237 	void *arg;
238 };
239 
240 
241 typedef unsigned short atm_backend_t;
242 #endif /* _LINUX_ATM_H */
243