atmsap.h

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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