11.1.14 DL_INFO_ACK--Convey Info Summary

The LLC2 and LAPB drivers respond to the DL_INFO_REQ with a DL_INFO_ACK message.

Associated Structure

This message consists of one M_PCPROTO message block, with the following structure:

typedef struct {
        t_uscalar_t     dl_primitive;           /* set to DL_INFO_ACK */
        t_uscalar_t     dl_max_sdu;             /* Max bytes in a DLSDU */
        t_uscalar_t     dl_min_sdu;             /* Min bytes in a DLSDU */
        t_uscalar_t     dl_addr_length;         /* length of DLSAP address */
        t_uscalar_t     dl_mac_type;            /* type of medium supported */
        t_uscalar_t     dl_reserved;            /* value set to zero */
        t_uscalar_t     dl_current_state;       /* state of DLPI interface */
        t_scalar_t      dl_sap_length;          /* length of dlsap SAP part */
        t_uscalar_t     dl_service_mode;        /* CO, CL or ACL */
        t_uscalar_t     dl_qos_length;          /* length of qos values */
        t_uscalar_t     dl_qos_offset;          /* offset from start of block */
        t_uscalar_t     dl_qos_range_length;    /* available range of qos */
        t_uscalar_t     dl_qos_range_offset;    /* offset from start of block */
        t_uscalar_t     dl_provider_style;      /* style1 or style2 */
        t_uscalar_t     dl_addr_offset;         /* offset of the dlsap addr */
        t_uscalar_t     dl_version;             /* version number */
        t_uscalar_t     dl_brdcst_addr_length;  /* length of broadcast addr */
        t_uscalar_t     dl_brdcst_addr_offset;  /* offset from start of block */
        t_uscalar_t     dl_growth;              /* set to zero */
} dl_info_ack_t;

The members of the dl_info_ack_t structure are:

The QOS fields are always set to 0 when used over Ethernet/802.3. (dl_qos_length, dl_qos_offset, dl_qos_range_length, dl_qos_range_offset). Their settings above other media (FDDI, Token Ring, etc.) is to be defined. For descriptions of the other parameters, refer to the DLPI specifications.