FreeBSD/Linux Kernel Cross Reference
sys/netatm/atm_sap.h

     /*-
      *
      * ===================================
      * HARP  |  Host ATM Research Platform
      * ===================================
      *
      *
      * This Host ATM Research Platform ("HARP") file (the "Software") is
      * made available by Network Computing Services, Inc. ("NetworkCS")
     * "AS IS".  NetworkCS does not provide maintenance, improvements or
     * support of any kind.
     *
     * NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
     * INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
     * AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
     * SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
     * In no event shall NetworkCS be responsible for any damages, including
     * but not limited to consequential damages, arising from or relating to
     * any use of the Software or related support.
     *
     * Copyright 1994-1998 Network Computing Services, Inc.
     *
     * Copies of this Software may be made, however, the above copyright
     * notice must be reproduced on all copies.
     *
     *      @(#) $FreeBSD$
     *
     */
    
    /*
     * Core ATM Services
     * -----------------
     *
     * ATM Services definitions
     *
     */
    
    #ifndef _NETATM_ATM_SAP_H
    #define _NETATM_ATM_SAP_H
    
    /*
     * Service Access Point (SAP)
     *
     * A SAP specifies the definition of an interface used between two adjacent
     * layers.  The SAP is named for the services the lower layer provides to 
     * the upper layer.
     *
     * The types of SAPs used are:
     *      Stack - defines the interfaces between stack service entities.
     *              These are further divided into:
     *
     *              Stack class SAP - which identifies the type of interface
     *                      used.  All SAPs of a particular class will provide
     *                      the same interface services to the higher layer.
     *                      All stack command codes are constructed using class
     *                      SAP values.
     *
     *              Stack instance SAP - which identifies the specific identity
     *                      of the layer providing the class interface.
     */
    typedef u_short Sap_t;
    
    #define SAP_TYPE_MASK   0xc000
    #define SAP_TYPE_STACK  0x8000
    #define SAP_CLASS_MASK  0xff80
    
    #define SAP_STACK(c, i)         (SAP_TYPE_STACK | ((c) << 7) | (i))
    
    /* Stack SAPs */
    #define SAP_ATM                 SAP_STACK(1, 0)         /* ATM cell */
    #define SAP_SAR                 SAP_STACK(2, 0)         /* AAL SAR */
    #define SAP_SAR_AAL3_4          SAP_STACK(2, 3)         /* AAL3/4 SAR */
    #define SAP_SAR_AAL5            SAP_STACK(2, 5)         /* AAL5 SAR */
    #define SAP_CPCS                SAP_STACK(3, 0)         /* AAL CPCS */
    #define SAP_CPCS_AAL3_4         SAP_STACK(3, 3)         /* AAL3/4 CPCS */
    #define SAP_CPCS_AAL5           SAP_STACK(3, 5)         /* AAL5 CPCS */
    #define SAP_SSCOP               SAP_STACK(4, 0)         /* ITU Q.2110 */
    #define SAP_SSCF_UNI            SAP_STACK(5, 0)         /* ITU Q.2130 */
    #define SAP_SSCF_NNI            SAP_STACK(6, 0)         /* ITU Q.2140 */
    
    #endif  /* _NETATM_ATM_SAP_H */

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