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/* atm.h - general ATM declarations */
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/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
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/*
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 * WARNING: User-space programs should not #include <linux/atm.h> directly.
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 *          Instead, #include <atm.h>
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 */
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#ifndef _LINUX_ATM_H
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#define _LINUX_ATM_H
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/*
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 * BEGIN_xx and END_xx markers are used for automatic generation of
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 * documentation. Do not change them.
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 */
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#ifdef __KERNEL__
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#include <linux/socket.h>
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#include <linux/types.h>
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#endif
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#include <linux/atmapi.h>
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#include <linux/atmsap.h>
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#include <linux/atmioc.h>
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/* general ATM constants */
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#define ATM_CELL_SIZE               53  /* ATM cell size incl. header */
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#define ATM_CELL_PAYLOAD            48  /* ATM payload size */
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#define ATM_AAL0_SDU                52  /* AAL0 SDU size */
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#define ATM_MAX_AAL34_PDU        65535  /* maximum AAL3/4 PDU payload */
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#define ATM_AAL5_TRAILER             8  /* AAL5 trailer size */
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#define ATM_MAX_AAL5_PDU         65535  /* maximum AAL5 PDU payload */
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#define ATM_MAX_CDV               9999  /* maximum (default) CDV */
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#define ATM_NOT_RSV_VCI             32  /* first non-reserved VCI value */
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#define ATM_MAX_VPI                255  /* maximum VPI at the UNI */
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#define ATM_MAX_VPI_NNI           4096  /* maximum VPI at the NNI */
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#define ATM_MAX_VCI              65535  /* maximum VCI */
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/* "protcol" values for the socket system call */
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#define ATM_NO_AAL      0               /* AAL not specified */
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#define ATM_AAL0        13              /* "raw" ATM cells */
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#define ATM_AAL1        1               /* AAL1 (CBR) */
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#define ATM_AAL2        2               /* AAL2 (VBR) */
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#define ATM_AAL34       3               /* AAL3/4 (data) */
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#define ATM_AAL5        5               /* AAL5 (data) */
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/*
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 * socket option name coding functions
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 *
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 * Note that __SO_ENCODE and __SO_LEVEL are somewhat a hack since the
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 * << 22 only reserves 9 bits for the level.  On some architectures
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 * SOL_SOCKET is 0xFFFF, so that's a bit of a problem
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 */
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#define __SO_ENCODE(l,n,t)      ((((l) & 0x1FF) << 22) | ((n) << 16) | \
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                                sizeof(t))
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#define __SO_LEVEL_MATCH(c,m)   (((c) >> 22) == ((m) & 0x1FF))
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#define __SO_NUMBER(c)          (((c) >> 16) & 0x3f)
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#define __SO_SIZE(c)            ((c) & 0x3fff)
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/*
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 * ATM layer
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 */
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#define SO_SETCLP       __SO_ENCODE(SOL_ATM,0,int)
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                            /* set CLP bit value - TODO */
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#define SO_CIRANGE      __SO_ENCODE(SOL_ATM,1,struct atm_cirange)
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                            /* connection identifier range; socket must be
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                               bound or connected */
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#define SO_ATMQOS       __SO_ENCODE(SOL_ATM,2,struct atm_qos)
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                            /* Quality of Service setting */
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#define SO_ATMSAP       __SO_ENCODE(SOL_ATM,3,struct atm_sap)
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                            /* Service Access Point */
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#define SO_ATMPVC       __SO_ENCODE(SOL_ATM,4,struct sockaddr_atmpvc)
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                            /* "PVC" address (also for SVCs); get only */
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/*
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 * Note @@@: since the socket layers don't really distinguish the control and
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 * the data plane but generally seems to be data plane-centric, any layer is
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 * about equally wrong for the SAP. If you have a better idea about this,
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 * please speak up ...
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 */
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/* ATM cell header (for AAL0) */
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/* BEGIN_CH */
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#define ATM_HDR_GFC_MASK        0xf0000000
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#define ATM_HDR_GFC_SHIFT       28
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#define ATM_HDR_VPI_MASK        0x0ff00000
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#define ATM_HDR_VPI_SHIFT       20
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#define ATM_HDR_VCI_MASK        0x000ffff0
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#define ATM_HDR_VCI_SHIFT       4
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#define ATM_HDR_PTI_MASK        0x0000000e
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#define ATM_HDR_PTI_SHIFT       1
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#define ATM_HDR_CLP             0x00000001
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/* END_CH */
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/* PTI codings */
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/* BEGIN_PTI */
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#define ATM_PTI_US0     0  /* user data cell, congestion not exp, SDU-type 0 */
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#define ATM_PTI_US1     1  /* user data cell, congestion not exp, SDU-type 1 */
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#define ATM_PTI_UCES0   2  /* user data cell, cong. experienced, SDU-type 0 */
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#define ATM_PTI_UCES1   3  /* user data cell, cong. experienced, SDU-type 1 */
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#define ATM_PTI_SEGF5   4  /* segment OAM F5 flow related cell */
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#define ATM_PTI_E2EF5   5  /* end-to-end OAM F5 flow related cell */
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#define ATM_PTI_RSV_RM  6  /* reserved for traffic control/resource mgmt */
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#define ATM_PTI_RSV     7  /* reserved */
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/* END_PTI */
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/*
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 * The following items should stay in linux/atm.h, which should be linked to
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 * netatm/atm.h
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 */
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/* Traffic description */
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#define ATM_NONE        0               /* no traffic */
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#define ATM_UBR         1
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#define ATM_CBR         2
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#define ATM_VBR         3
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#define ATM_ABR         4
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#define ATM_ANYCLASS    5               /* compatible with everything */
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#define ATM_MAX_PCR     -1              /* maximum available PCR */
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struct atm_trafprm {
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        unsigned char   traffic_class;  /* traffic class (ATM_UBR, ...) */
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        int             max_pcr;        /* maximum PCR in cells per second */
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        int             pcr;            /* desired PCR in cells per second */
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        int             min_pcr;        /* minimum PCR in cells per second */
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        int             max_cdv;        /* maximum CDV in microseconds */
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        int             max_sdu;        /* maximum SDU in bytes */
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        /* extra params for ABR */
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        unsigned int    icr;            /* Initial Cell Rate (24-bit) */
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        unsigned int    tbe;            /* Transient Buffer Exposure (24-bit) */
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        unsigned int    frtt : 24;      /* Fixed Round Trip Time (24-bit) */
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        unsigned int    rif  : 4;       /* Rate Increment Factor (4-bit) */
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        unsigned int    rdf  : 4;       /* Rate Decrease Factor (4-bit) */
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        unsigned int nrm_pres  :1;      /* nrm present bit */
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        unsigned int trm_pres  :1;      /* rm present bit */
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        unsigned int adtf_pres :1;      /* adtf present bit */
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        unsigned int cdf_pres  :1;      /* cdf present bit*/
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        unsigned int nrm       :3;      /* Max # of Cells for each forward RM cell (3-bit) */
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        unsigned int trm       :3;      /* Time between forward RM cells (3-bit) */    
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        unsigned int adtf      :10;     /* ACR Decrease Time Factor (10-bit) */
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        unsigned int cdf       :3;      /* Cutoff Decrease Factor (3-bit) */
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        unsigned int spare     :9;      /* spare bits */
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};
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struct atm_qos {
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        struct atm_trafprm txtp;        /* parameters in TX direction */
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        struct atm_trafprm rxtp __ATM_API_ALIGN;
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                                        /* parameters in RX direction */
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        unsigned char aal __ATM_API_ALIGN;
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};
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/* PVC addressing */
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#define ATM_ITF_ANY     -1              /* "magic" PVC address values */
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#define ATM_VPI_ANY     -1
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#define ATM_VCI_ANY     -1
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#define ATM_VPI_UNSPEC  -2
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#define ATM_VCI_UNSPEC  -2
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struct sockaddr_atmpvc {
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        unsigned short  sap_family;     /* address family, AF_ATMPVC  */
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        struct {                        /* PVC address */
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                short   itf;            /* ATM interface */
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                short   vpi;            /* VPI (only 8 bits at UNI) */
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                int     vci;            /* VCI (only 16 bits at UNI) */
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        } sap_addr __ATM_API_ALIGN;     /* PVC address */
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};
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/* SVC addressing */
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#define ATM_ESA_LEN     20              /* ATM End System Address length */
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#define ATM_E164_LEN    12              /* maximum E.164 number length */
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#define ATM_AFI_DCC     0x39            /* DCC ATM Format */
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#define ATM_AFI_ICD     0x47            /* ICD ATM Format */
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#define ATM_AFI_E164    0x45            /* E.164 ATM Format */
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#define ATM_AFI_LOCAL   0x49            /* Local ATM Format */ 
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#define ATM_AFI_DCC_GROUP       0xBD    /* DCC ATM Group Format */
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#define ATM_AFI_ICD_GROUP       0xC5    /* ICD ATM Group Format */
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#define ATM_AFI_E164_GROUP      0xC3    /* E.164 ATM Group Format */
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#define ATM_AFI_LOCAL_GROUP     0xC7    /* Local ATM Group Format */
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#define ATM_LIJ_NONE    0               /* no leaf-initiated join */
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#define ATM_LIJ         1               /* request joining */
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#define ATM_LIJ_RPJ     2               /* set to root-prompted join */
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#define ATM_LIJ_NJ      3               /* set to network join */
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struct sockaddr_atmsvc {
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    unsigned short      sas_family;     /* address family, AF_ATMSVC */
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    struct {                            /* SVC address */
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        unsigned char   prv[ATM_ESA_LEN];/* private ATM address */
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        char            pub[ATM_E164_LEN+1]; /* public address (E.164) */
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                                        /* unused addresses must be bzero'ed */
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        char            lij_type;       /* role in LIJ call; one of ATM_LIJ* */
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        uint32_t        lij_id;         /* LIJ call identifier */
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    } sas_addr __ATM_API_ALIGN;         /* SVC address */
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};
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static __inline__ int atmsvc_addr_in_use(struct sockaddr_atmsvc addr)
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{
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        return *addr.sas_addr.prv || *addr.sas_addr.pub;
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}
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static __inline__ int atmpvc_addr_in_use(struct sockaddr_atmpvc addr)
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{
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        return addr.sap_addr.itf || addr.sap_addr.vpi || addr.sap_addr.vci;
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}
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/*
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 * Some stuff for linux/sockios.h
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 */
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struct atmif_sioc {
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    int number;
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    int length;
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    void *arg;
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};
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typedef unsigned short atm_backend_t;
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#endif