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/* atmsap.h - ATM Service Access Point addressing definitions */

/* Written 1995-1999 by Werner Almesberger, EPFL LRC/ICA */


#ifndef _LINUX_ATMSAP_H
#define _LINUX_ATMSAP_H

#include <linux/atmapi.h>

/*
 * BEGIN_xx and END_xx markers are used for automatic generation of
 * documentation. Do not change them.
 */


/*
 * Layer 2 protocol identifiers
 */

/* BEGIN_L2 */
#define ATM_L2_NONE     0       /* L2 not specified */
#define ATM_L2_ISO1745  0x01    /* Basic mode ISO 1745 */
#define ATM_L2_Q291     0x02    /* ITU-T Q.291 (Rec. I.441) */
#define ATM_L2_X25_LL   0x06    /* ITU-T X.25, link layer */
#define ATM_L2_X25_ML   0x07    /* ITU-T X.25, multilink */
#define ATM_L2_LAPB     0x08    /* Extended LAPB, half-duplex (Rec. T.71) */
#define ATM_L2_HDLC_ARM 0x09    /* HDLC ARM (ISO/IEC 4335) */
#define ATM_L2_HDLC_NRM 0x0a    /* HDLC NRM (ISO/IEC 4335) */
#define ATM_L2_HDLC_ABM 0x0b    /* HDLC ABM (ISO/IEC 4335) */
#define ATM_L2_ISO8802  0x0c    /* LAN LLC (ISO/IEC 8802/2) */
#define ATM_L2_X75      0x0d    /* ITU-T X.75, SLP */
#define ATM_L2_Q922     0x0e    /* ITU-T Q.922 */
#define ATM_L2_USER     0x10    /* user-specified */
#define ATM_L2_ISO7776  0x11    /* ISO 7776 DTE-DTE */
/* END_L2 */


/*
 * Layer 3 protocol identifiers
 */

/* BEGIN_L3 */
#define ATM_L3_NONE     0       /* L3 not specified */
#define ATM_L3_X25      0x06    /* ITU-T X.25, packet layer */
#define ATM_L3_ISO8208  0x07    /* ISO/IEC 8208 */
#define ATM_L3_X223     0x08    /* ITU-T X.223 | ISO/IEC 8878 */
#define ATM_L3_ISO8473  0x09    /* ITU-T X.233 | ISO/IEC 8473 */
#define ATM_L3_T70      0x0a    /* ITU-T T.70 minimum network layer */
#define ATM_L3_TR9577   0x0b    /* ISO/IEC TR 9577 */
#define ATM_L3_H310     0x0c    /* ITU-T Recommendation H.310 */
#define ATM_L3_H321     0x0d    /* ITU-T Recommendation H.321 */
#define ATM_L3_USER     0x10    /* user-specified */
/* END_L3 */


/*
 * High layer identifiers
 */

/* BEGIN_HL */
#define ATM_HL_NONE     0       /* HL not specified */
#define ATM_HL_ISO      0x01    /* ISO */
#define ATM_HL_USER     0x02    /* user-specific */
#define ATM_HL_HLP      0x03    /* high layer profile - UNI 3.0 only */
#define ATM_HL_VENDOR   0x04    /* vendor-specific application identifier */
/* END_HL */


/*
 * ITU-T coded mode of operation
 */

/* BEGIN_IMD */
#define ATM_IMD_NONE     0      /* mode not specified */
#define ATM_IMD_NORMAL   1      /* normal mode of operation */
#define ATM_IMD_EXTENDED 2      /* extended mode of operation */
/* END_IMD */

/*
 * H.310 code points
 */

#define ATM_TT_NONE     0       /* terminal type not specified */
#define ATM_TT_RX       1       /* receive only */
#define ATM_TT_TX       2       /* send only */
#define ATM_TT_RXTX     3       /* receive and send */

#define ATM_MC_NONE     0       /* no multiplexing */
#define ATM_MC_TS       1       /* transport stream (TS) */
#define ATM_MC_TS_FEC   2       /* transport stream with forward error corr. */
#define ATM_MC_PS       3       /* program stream (PS) */
#define ATM_MC_PS_FEC   4       /* program stream with forward error corr. */
#define ATM_MC_H221     5       /* ITU-T Rec. H.221 */

/*
 * SAP structures
 */

#define ATM_MAX_HLI     8       /* maximum high-layer information length */


struct atm_blli {
    unsigned char l2_proto;     /* layer 2 protocol */
    union {
        struct {
            unsigned char mode; /* mode of operation (ATM_IMD_xxx), 0 if */
                                /* absent */
            unsigned char window; /* window size (k), 1-127 (0 to omit) */
        } itu;                  /* ITU-T encoding */
        unsigned char user;     /* user-specified l2 information */
    } l2;
    unsigned char l3_proto;     /* layer 3 protocol */
    union {
        struct {
            unsigned char mode; /* mode of operation (ATM_IMD_xxx), 0 if */
                                /* absent */
            unsigned char def_size; /* default packet size (log2), 4-12 (0 to */
                                    /* omit) */
            unsigned char window;/* packet window size, 1-127 (0 to omit) */
        } itu;                  /* ITU-T encoding */
        unsigned char user;     /* user specified l3 information */
        struct {                      /* if l3_proto = ATM_L3_H310 */
            unsigned char term_type;  /* terminal type */
            unsigned char fw_mpx_cap; /* forward multiplexing capability */
                                      /* only if term_type != ATM_TT_NONE */
            unsigned char bw_mpx_cap; /* backward multiplexing capability */
                                      /* only if term_type != ATM_TT_NONE */
        } h310;
        struct {                  /* if l3_proto = ATM_L3_TR9577 */
            unsigned char ipi;    /* initial protocol id */
            unsigned char snap[5];/* IEEE 802.1 SNAP identifier */
                                  /* (only if ipi == NLPID_IEEE802_1_SNAP) */
        } tr9577;
    } l3;
} __ATM_API_ALIGN;


struct atm_bhli {
    unsigned char hl_type;      /* high layer information type */
    unsigned char hl_length;    /* length (only if hl_type == ATM_HL_USER || */
                                /* hl_type == ATM_HL_ISO) */
    unsigned char hl_info[ATM_MAX_HLI];/* high layer information */
};


#define ATM_MAX_BLLI    3               /* maximum number of BLLI elements */


struct atm_sap {
        struct atm_bhli bhli;           /* local SAP, high-layer information */
        struct atm_blli blli[ATM_MAX_BLLI] __ATM_API_ALIGN;
                                        /* local SAP, low-layer info */
};


static __inline__ int blli_in_use(struct atm_blli blli)
{
        return blli.l2_proto || blli.l3_proto;
}

#endif