linux/include/linux/atm.h
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   1/* atm.h - general ATM declarations */
   2 
   3/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
   4 
   5
   6/*
   7 * WARNING: User-space programs should not #include <linux/atm.h> directly.
   8 *          Instead, #include <atm.h>
   9 */
  10
  11#ifndef _LINUX_ATM_H
  12#define _LINUX_ATM_H
  13
  14/*
  15 * BEGIN_xx and END_xx markers are used for automatic generation of
  16 * documentation. Do not change them.
  17 */
  18
  19#include <linux/compiler.h>
  20#include <linux/atmapi.h>
  21#include <linux/atmsap.h>
  22#include <linux/atmioc.h>
  23#include <linux/types.h>
  24
  25
  26/* general ATM constants */
  27#define ATM_CELL_SIZE               53  /* ATM cell size incl. header */
  28#define ATM_CELL_PAYLOAD            48  /* ATM payload size */
  29#define ATM_AAL0_SDU                52  /* AAL0 SDU size */
  30#define ATM_MAX_AAL34_PDU        65535  /* maximum AAL3/4 PDU payload */
  31#define ATM_AAL5_TRAILER             8  /* AAL5 trailer size */
  32#define ATM_MAX_AAL5_PDU         65535  /* maximum AAL5 PDU payload */
  33#define ATM_MAX_CDV               9999  /* maximum (default) CDV */
  34#define ATM_NOT_RSV_VCI             32  /* first non-reserved VCI value */
  35
  36#define ATM_MAX_VPI                255  /* maximum VPI at the UNI */
  37#define ATM_MAX_VPI_NNI           4096  /* maximum VPI at the NNI */
  38#define ATM_MAX_VCI              65535  /* maximum VCI */
  39
  40
  41/* "protcol" values for the socket system call */
  42#define ATM_NO_AAL      0               /* AAL not specified */
  43#define ATM_AAL0        13              /* "raw" ATM cells */
  44#define ATM_AAL1        1               /* AAL1 (CBR) */
  45#define ATM_AAL2        2               /* AAL2 (VBR) */
  46#define ATM_AAL34       3               /* AAL3/4 (data) */
  47#define ATM_AAL5        5               /* AAL5 (data) */
  48
  49/*
  50 * socket option name coding functions
  51 *
  52 * Note that __SO_ENCODE and __SO_LEVEL are somewhat a hack since the
  53 * << 22 only reserves 9 bits for the level.  On some architectures
  54 * SOL_SOCKET is 0xFFFF, so that's a bit of a problem
  55 */
  56
  57#define __SO_ENCODE(l,n,t)      ((((l) & 0x1FF) << 22) | ((n) << 16) | \
  58                                sizeof(t))
  59#define __SO_LEVEL_MATCH(c,m)   (((c) >> 22) == ((m) & 0x1FF))
  60#define __SO_NUMBER(c)          (((c) >> 16) & 0x3f)
  61#define __SO_SIZE(c)            ((c) & 0x3fff)
  62
  63/*
  64 * ATM layer
  65 */
  66
  67#define SO_SETCLP       __SO_ENCODE(SOL_ATM,0,int)
  68                            /* set CLP bit value - TODO */
  69#define SO_CIRANGE      __SO_ENCODE(SOL_ATM,1,struct atm_cirange)
  70                            /* connection identifier range; socket must be
  71                               bound or connected */
  72#define SO_ATMQOS       __SO_ENCODE(SOL_ATM,2,struct atm_qos)
  73                            /* Quality of Service setting */
  74#define SO_ATMSAP       __SO_ENCODE(SOL_ATM,3,struct atm_sap)
  75                            /* Service Access Point */
  76#define SO_ATMPVC       __SO_ENCODE(SOL_ATM,4,struct sockaddr_atmpvc)
  77                            /* "PVC" address (also for SVCs); get only */
  78#define SO_MULTIPOINT   __SO_ENCODE(SOL_ATM, 5, int)
  79                            /* make this vc a p2mp */
  80
  81
  82/*
  83 * Note @@@: since the socket layers don't really distinguish the control and
  84 * the data plane but generally seems to be data plane-centric, any layer is
  85 * about equally wrong for the SAP. If you have a better idea about this,
  86 * please speak up ...
  87 */
  88
  89
  90/* ATM cell header (for AAL0) */
  91
  92/* BEGIN_CH */
  93#define ATM_HDR_GFC_MASK        0xf0000000
  94#define ATM_HDR_GFC_SHIFT       28
  95#define ATM_HDR_VPI_MASK        0x0ff00000
  96#define ATM_HDR_VPI_SHIFT       20
  97#define ATM_HDR_VCI_MASK        0x000ffff0
  98#define ATM_HDR_VCI_SHIFT       4
  99#define ATM_HDR_PTI_MASK        0x0000000e
 100#define ATM_HDR_PTI_SHIFT       1
 101#define ATM_HDR_CLP             0x00000001
 102/* END_CH */
 103
 104
 105/* PTI codings */
 106
 107/* BEGIN_PTI */
 108#define ATM_PTI_US0     0  /* user data cell, congestion not exp, SDU-type 0 */
 109#define ATM_PTI_US1     1  /* user data cell, congestion not exp, SDU-type 1 */
 110#define ATM_PTI_UCES0   2  /* user data cell, cong. experienced, SDU-type 0 */
 111#define ATM_PTI_UCES1   3  /* user data cell, cong. experienced, SDU-type 1 */
 112#define ATM_PTI_SEGF5   4  /* segment OAM F5 flow related cell */
 113#define ATM_PTI_E2EF5   5  /* end-to-end OAM F5 flow related cell */
 114#define ATM_PTI_RSV_RM  6  /* reserved for traffic control/resource mgmt */
 115#define ATM_PTI_RSV     7  /* reserved */
 116/* END_PTI */
 117
 118
 119/*
 120 * The following items should stay in linux/atm.h, which should be linked to
 121 * netatm/atm.h
 122 */
 123
 124/* Traffic description */
 125
 126#define ATM_NONE        0               /* no traffic */
 127#define ATM_UBR         1
 128#define ATM_CBR         2
 129#define ATM_VBR         3
 130#define ATM_ABR         4
 131#define ATM_ANYCLASS    5               /* compatible with everything */
 132
 133#define ATM_MAX_PCR     -1              /* maximum available PCR */
 134
 135struct atm_trafprm {
 136        unsigned char   traffic_class;  /* traffic class (ATM_UBR, ...) */
 137        int             max_pcr;        /* maximum PCR in cells per second */
 138        int             pcr;            /* desired PCR in cells per second */
 139        int             min_pcr;        /* minimum PCR in cells per second */
 140        int             max_cdv;        /* maximum CDV in microseconds */
 141        int             max_sdu;        /* maximum SDU in bytes */
 142        /* extra params for ABR */
 143        unsigned int    icr;            /* Initial Cell Rate (24-bit) */
 144        unsigned int    tbe;            /* Transient Buffer Exposure (24-bit) */ 
 145        unsigned int    frtt : 24;      /* Fixed Round Trip Time (24-bit) */
 146        unsigned int    rif  : 4;       /* Rate Increment Factor (4-bit) */
 147        unsigned int    rdf  : 4;       /* Rate Decrease Factor (4-bit) */
 148        unsigned int nrm_pres  :1;      /* nrm present bit */
 149        unsigned int trm_pres  :1;      /* rm present bit */
 150        unsigned int adtf_pres :1;      /* adtf present bit */
 151        unsigned int cdf_pres  :1;      /* cdf present bit*/
 152        unsigned int nrm       :3;      /* Max # of Cells for each forward RM cell (3-bit) */
 153        unsigned int trm       :3;      /* Time between forward RM cells (3-bit) */    
 154        unsigned int adtf      :10;     /* ACR Decrease Time Factor (10-bit) */
 155        unsigned int cdf       :3;      /* Cutoff Decrease Factor (3-bit) */
 156        unsigned int spare     :9;      /* spare bits */ 
 157};
 158
 159struct atm_qos {
 160        struct atm_trafprm txtp;        /* parameters in TX direction */
 161        struct atm_trafprm rxtp __ATM_API_ALIGN;
 162                                        /* parameters in RX direction */
 163        unsigned char aal __ATM_API_ALIGN;
 164};
 165
 166/* PVC addressing */
 167
 168#define ATM_ITF_ANY     -1              /* "magic" PVC address values */
 169#define ATM_VPI_ANY     -1
 170#define ATM_VCI_ANY     -1
 171#define ATM_VPI_UNSPEC  -2
 172#define ATM_VCI_UNSPEC  -2
 173
 174
 175struct sockaddr_atmpvc {
 176        unsigned short  sap_family;     /* address family, AF_ATMPVC  */
 177        struct {                        /* PVC address */
 178                short   itf;            /* ATM interface */
 179                short   vpi;            /* VPI (only 8 bits at UNI) */
 180                int     vci;            /* VCI (only 16 bits at UNI) */
 181        } sap_addr __ATM_API_ALIGN;     /* PVC address */
 182};
 183
 184/* SVC addressing */
 185
 186#define ATM_ESA_LEN     20              /* ATM End System Address length */
 187#define ATM_E164_LEN    12              /* maximum E.164 number length */
 188
 189#define ATM_AFI_DCC     0x39            /* DCC ATM Format */
 190#define ATM_AFI_ICD     0x47            /* ICD ATM Format */
 191#define ATM_AFI_E164    0x45            /* E.164 ATM Format */
 192#define ATM_AFI_LOCAL   0x49            /* Local ATM Format */ 
 193
 194#define ATM_AFI_DCC_GROUP       0xBD    /* DCC ATM Group Format */
 195#define ATM_AFI_ICD_GROUP       0xC5    /* ICD ATM Group Format */
 196#define ATM_AFI_E164_GROUP      0xC3    /* E.164 ATM Group Format */
 197#define ATM_AFI_LOCAL_GROUP     0xC7    /* Local ATM Group Format */
 198
 199#define ATM_LIJ_NONE    0               /* no leaf-initiated join */
 200#define ATM_LIJ         1               /* request joining */
 201#define ATM_LIJ_RPJ     2               /* set to root-prompted join */
 202#define ATM_LIJ_NJ      3               /* set to network join */
 203
 204
 205struct sockaddr_atmsvc {
 206    unsigned short      sas_family;     /* address family, AF_ATMSVC */
 207    struct {                            /* SVC address */
 208        unsigned char   prv[ATM_ESA_LEN];/* private ATM address */
 209        char            pub[ATM_E164_LEN+1]; /* public address (E.164) */
 210                                        /* unused addresses must be bzero'ed */
 211        char            lij_type;       /* role in LIJ call; one of ATM_LIJ* */
 212        __u32   lij_id;         /* LIJ call identifier */
 213    } sas_addr __ATM_API_ALIGN;         /* SVC address */
 214};
 215
 216
 217static __inline__ int atmsvc_addr_in_use(struct sockaddr_atmsvc addr)
 218{
 219        return *addr.sas_addr.prv || *addr.sas_addr.pub;
 220}
 221
 222
 223static __inline__ int atmpvc_addr_in_use(struct sockaddr_atmpvc addr)
 224{
 225        return addr.sap_addr.itf || addr.sap_addr.vpi || addr.sap_addr.vci;
 226}
 227
 228
 229/*
 230 * Some stuff for linux/sockios.h
 231 */
 232
 233struct atmif_sioc {
 234        int number;
 235        int length;
 236        void __user *arg;
 237};
 238
 239#ifdef __KERNEL__
 240#ifdef CONFIG_COMPAT
 241#include <linux/compat.h>
 242struct compat_atmif_sioc {
 243        int number;
 244        int length;
 245        compat_uptr_t arg;
 246};
 247#endif
 248#endif
 249
 250typedef unsigned short atm_backend_t;
 251#endif
 252
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