include/linux/atm.h

   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 #ifdef __KERNEL__
  20 #include <linux/socket.h>
  21 #include <linux/types.h>
  22 #endif
  23 #include <linux/compiler.h>
  24 #include <linux/atmapi.h>
  25 #include <linux/atmsap.h>
  26 #include <linux/atmioc.h>
  27
  28
  29 /* general ATM constants */
  30 #define ATM_CELL_SIZE               53  /* ATM cell size incl. header */
  31 #define ATM_CELL_PAYLOAD            48  /* ATM payload size */
  32 #define ATM_AAL0_SDU                52  /* AAL0 SDU size */
  33 #define ATM_MAX_AAL34_PDU        65535  /* maximum AAL3/4 PDU payload */
  34 #define ATM_AAL5_TRAILER             8  /* AAL5 trailer size */
  35 #define ATM_MAX_AAL5_PDU         65535  /* maximum AAL5 PDU payload */
  36 #define ATM_MAX_CDV               9999  /* maximum (default) CDV */
  37 #define ATM_NOT_RSV_VCI             32  /* first non-reserved VCI value */
  38
  39 #define ATM_MAX_VPI                255  /* maximum VPI at the UNI */
  40 #define ATM_MAX_VPI_NNI           4096  /* maximum VPI at the NNI */
  41 #define ATM_MAX_VCI              65535  /* maximum VCI */
  42
  43
  44 /* "protcol" values for the socket system call */
  45 #define ATM_NO_AAL      0               /* AAL not specified */
  46 #define ATM_AAL0        13              /* "raw" ATM cells */
  47 #define ATM_AAL1        1               /* AAL1 (CBR) */
  48 #define ATM_AAL2        2               /* AAL2 (VBR) */
  49 #define ATM_AAL34       3               /* AAL3/4 (data) */
  50 #define ATM_AAL5        5               /* AAL5 (data) */
  51
  52 /*
  53  * socket option name coding functions
  54  *
  55  * Note that __SO_ENCODE and __SO_LEVEL are somewhat a hack since the
  56  * << 22 only reserves 9 bits for the level.  On some architectures
  57  * SOL_SOCKET is 0xFFFF, so that's a bit of a problem
  58  */
  59
  60 #define __SO_ENCODE(l,n,t)      ((((l) & 0x1FF) << 22) | ((n) << 16) | \
  61                                 sizeof(t))
  62 #define __SO_LEVEL_MATCH(c,m)   (((c) >> 22) == ((m) & 0x1FF))
  63 #define __SO_NUMBER(c)          (((c) >> 16) & 0x3f)
  64 #define __SO_SIZE(c)            ((c) & 0x3fff)
  65
  66 /*
  67  * ATM layer
  68  */
  69
  70 #define SO_SETCLP       __SO_ENCODE(SOL_ATM,0,int)
  71                             /* set CLP bit value - TODO */
  72 #define SO_CIRANGE      __SO_ENCODE(SOL_ATM,1,struct atm_cirange)
  73                             /* connection identifier range; socket must be
  74                                bound or connected */
  75 #define SO_ATMQOS       __SO_ENCODE(SOL_ATM,2,struct atm_qos)
  76                             /* Quality of Service setting */
  77 #define SO_ATMSAP       __SO_ENCODE(SOL_ATM,3,struct atm_sap)
  78                             /* Service Access Point */
  79 #define SO_ATMPVC       __SO_ENCODE(SOL_ATM,4,struct sockaddr_atmpvc)
  80                             /* "PVC" address (also for SVCs); get only */
  81 #define SO_MULTIPOINT   __SO_ENCODE(SOL_ATM, 5, int)
  82                             /* make this vc a p2mp */
  83
  84
  85 /*
  86  * Note @@@: since the socket layers don't really distinguish the control and
  87  * the data plane but generally seems to be data plane-centric, any layer is
  88  * about equally wrong for the SAP. If you have a better idea about this,
  89  * please speak up ...
  90  */
  91
  92
  93 /* ATM cell header (for AAL0) */
  94
  95 /* BEGIN_CH */
  96 #define ATM_HDR_GFC_MASK        0xf0000000
  97 #define ATM_HDR_GFC_SHIFT       28
  98 #define ATM_HDR_VPI_MASK        0x0ff00000
  99 #define ATM_HDR_VPI_SHIFT       20
 100 #define ATM_HDR_VCI_MASK        0x000ffff0
 101 #define ATM_HDR_VCI_SHIFT       4
 102 #define ATM_HDR_PTI_MASK        0x0000000e
 103 #define ATM_HDR_PTI_SHIFT       1
 104 #define ATM_HDR_CLP             0x00000001
 105 /* END_CH */
 106
 107
 108 /* PTI codings */
 109
 110 /* BEGIN_PTI */
 111 #define ATM_PTI_US0     0  /* user data cell, congestion not exp, SDU-type 0 */
 112 #define ATM_PTI_US1     1  /* user data cell, congestion not exp, SDU-type 1 */
 113 #define ATM_PTI_UCES0   2  /* user data cell, cong. experienced, SDU-type 0 */
 114 #define ATM_PTI_UCES1   3  /* user data cell, cong. experienced, SDU-type 1 */
 115 #define ATM_PTI_SEGF5   4  /* segment OAM F5 flow related cell */
 116 #define ATM_PTI_E2EF5   5  /* end-to-end OAM F5 flow related cell */
 117 #define ATM_PTI_RSV_RM  6  /* reserved for traffic control/resource mgmt */
 118 #define ATM_PTI_RSV     7  /* reserved */
 119 /* END_PTI */
 120
 121
 122 /*
 123  * The following items should stay in linux/atm.h, which should be linked to
 124  * netatm/atm.h
 125  */
 126
 127 /* Traffic description */
 128
 129 #define ATM_NONE        0               /* no traffic */
 130 #define ATM_UBR         1
 131 #define ATM_CBR         2
 132 #define ATM_VBR         3
 133 #define ATM_ABR         4
 134 #define ATM_ANYCLASS    5               /* compatible with everything */
 135
 136 #define ATM_MAX_PCR     -1              /* maximum available PCR */
 137
 138 struct atm_trafprm {
 139         unsigned char   traffic_class;  /* traffic class (ATM_UBR, ...) */
 140         int             max_pcr;        /* maximum PCR in cells per second */
 141         int             pcr;            /* desired PCR in cells per second */
 142         int             min_pcr;        /* minimum PCR in cells per second */
 143         int             max_cdv;        /* maximum CDV in microseconds */
 144         int             max_sdu;        /* maximum SDU in bytes */
 145         /* extra params for ABR */
 146         unsigned int    icr;            /* Initial Cell Rate (24-bit) */
 147         unsigned int    tbe;            /* Transient Buffer Exposure (24-bit) */
 148         unsigned int    frtt : 24;      /* Fixed Round Trip Time (24-bit) */
 149         unsigned int    rif  : 4;       /* Rate Increment Factor (4-bit) */
 150         unsigned int    rdf  : 4;       /* Rate Decrease Factor (4-bit) */
 151         unsigned int nrm_pres  :1;      /* nrm present bit */
 152         unsigned int trm_pres  :1;      /* rm present bit */
 153         unsigned int adtf_pres :1;      /* adtf present bit */
 154         unsigned int cdf_pres  :1;      /* cdf present bit*/
 155         unsigned int nrm       :3;      /* Max # of Cells for each forward RM cell (3-bit) */
 156         unsigned int trm       :3;      /* Time between forward RM cells (3-bit) */
 157         unsigned int adtf      :10;     /* ACR Decrease Time Factor (10-bit) */
 158         unsigned int cdf       :3;      /* Cutoff Decrease Factor (3-bit) */
 159         unsigned int spare     :9;      /* spare bits */
 160 };
 161
 162 struct atm_qos {
 163         struct atm_trafprm txtp;        /* parameters in TX direction */
 164         struct atm_trafprm rxtp __ATM_API_ALIGN;
 165                                         /* parameters in RX direction */
 166         unsigned char aal __ATM_API_ALIGN;
 167 };
 168
 169 /* PVC addressing */
 170
 171 #define ATM_ITF_ANY     -1              /* "magic" PVC address values */
 172 #define ATM_VPI_ANY     -1
 173 #define ATM_VCI_ANY     -1
 174 #define ATM_VPI_UNSPEC  -2
 175 #define ATM_VCI_UNSPEC  -2
 176
 177
 178 struct sockaddr_atmpvc {
 179         unsigned short  sap_family;     /* address family, AF_ATMPVC  */
 180         struct {                        /* PVC address */
 181                 short   itf;            /* ATM interface */
 182                 short   vpi;            /* VPI (only 8 bits at UNI) */
 183                 int     vci;            /* VCI (only 16 bits at UNI) */
 184         } sap_addr __ATM_API_ALIGN;     /* PVC address */
 185 };
 186
 187 /* SVC addressing */
 188
 189 #define ATM_ESA_LEN     20              /* ATM End System Address length */
 190 #define ATM_E164_LEN    12              /* maximum E.164 number length */
 191
 192 #define ATM_AFI_DCC     0x39            /* DCC ATM Format */
 193 #define ATM_AFI_ICD     0x47            /* ICD ATM Format */
 194 #define ATM_AFI_E164    0x45            /* E.164 ATM Format */
 195 #define ATM_AFI_LOCAL   0x49            /* Local ATM Format */
 196
 197 #define ATM_AFI_DCC_GROUP       0xBD    /* DCC ATM Group Format */
 198 #define ATM_AFI_ICD_GROUP       0xC5    /* ICD ATM Group Format */
 199 #define ATM_AFI_E164_GROUP      0xC3    /* E.164 ATM Group Format */
 200 #define ATM_AFI_LOCAL_GROUP     0xC7    /* Local ATM Group Format */
 201
 202 #define ATM_LIJ_NONE    0               /* no leaf-initiated join */
 203 #define ATM_LIJ         1               /* request joining */
 204 #define ATM_LIJ_RPJ     2               /* set to root-prompted join */
 205 #define ATM_LIJ_NJ      3               /* set to network join */
 206
 207
 208 struct sockaddr_atmsvc {
 209     unsigned short      sas_family;     /* address family, AF_ATMSVC */
 210     struct {                            /* SVC address */
 211         unsigned char   prv[ATM_ESA_LEN];/* private ATM address */
 212         char            pub[ATM_E164_LEN+1]; /* public address (E.164) */
 213                                         /* unused addresses must be bzero'ed */
 214         char            lij_type;       /* role in LIJ call; one of ATM_LIJ* */
 215         uint32_t        lij_id;         /* LIJ call identifier */
 216     } sas_addr __ATM_API_ALIGN;         /* SVC address */
 217 };
 218
 219
 220 static __inline__ int atmsvc_addr_in_use(struct sockaddr_atmsvc addr)
 221 {
 222         return *addr.sas_addr.prv || *addr.sas_addr.pub;
 223 }
 224
 225
 226 static __inline__ int atmpvc_addr_in_use(struct sockaddr_atmpvc addr)
 227 {
 228         return addr.sap_addr.itf || addr.sap_addr.vpi || addr.sap_addr.vci;
 229 }
 230
 231
 232 /*
 233  * Some stuff for linux/sockios.h
 234  */
 235
 236 struct atmif_sioc {
 237     int number;
 238     int length;
 239     void __user *arg;
 240 };
 241
 242 typedef unsigned short atm_backend_t;
 243 #endif