SSCF UNI Design =============== SAP_SSCF_UNI Interface ---------------------- This is the stack SAP interface between the UNI signalling layer (eg. Q.2931) and the SSCF module. The stack commands defined for this interface are modeled after the SSCF protocol specification primitives AAL-xxx. See the protocol specification documents referenced below for full descriptions of the SSCF UNI interface presented to the signalling user. o The following stack commands are sent from the signalling module to SSCF: Stack Command: SSCF_UNI_INIT Description: Initialize a SAP instance. This should be the first stack command issued across the SAP instance after the service stack has been successfully instantiated. Argument 1: Specifies the UNI version to be used for this stack instance. (enum uni_vers) Argument 2: Not used. Stack Command: SSCF_UNI_TERM Description: Terminate a SAP instance. This must be the last stack command issued across the SAP instance. The stack instance will be deleted upon completion of this command. Argument 1: Not used. Argument 2: Not used. Stack Command: SSCF_UNI_ESTABLISH_REQ Description: Request the establishment of an assured SAAL connection to the SAAL peer entity. Argument 1: Not used. Argument 2: Not used. Stack Command: SSCF_UNI_RELEASE_REQ Description: Request the termination of an assured SAAL connection to the SAAL peer entity. Argument 1: Specifies whether future session establishment indications from the SAAL peer should be processed. Valid values are SSCF_UNI_ESTIND_YES or SSCF_UNI_ESTIND_NO. (int) Note that this is a local implementation parameter only. Argument 2: Not used. Stack Command: SSCF_UNI_DATA_REQ Description: Request that an assured SDU be sent to the SAAL peer. Argument 1: Pointer to an mbuf chain containing the user SDU. (struct mbuf *) Argument 2: Not used. Stack Command: SSCF_UNI_UNITDATA_REQ Description: Request that an unacknowledged SDU be sent to the SAAL peer. Argument 1: Pointer to an mbuf chain containing the user SDU. (struct mbuf *) Argument 2: Not used. o The following stack commands are sent from SSCF to the signalling module: Stack Command: SSCF_UNI_ESTABLISH_IND Description: Indication that an assured SAAL connection has been established by the SAAL peer entity. Argument 1: Not used. Argument 2: Not used. Stack Command: SSCF_UNI_ESTABLISH_CNF Description: Confirmation of an assured SAAL connection establishment, previously requested via an SSCF_UNI_ESTABLISH_REQ command. Argument 1: Not used. Argument 2: Not used. Stack Command: SSCF_UNI_RELEASE_IND Description: Indication that an assured SAAL connection has been terminated by the SAAL peer entity. Argument 1: Not used. Argument 2: Not used. Stack Command: SSCF_UNI_RELEASE_CNF Description: Confirmation of an assured SAAL connection termination, previously requested via an SSCF_UNI_RELEASE_REQ command. Argument 1: Not used. Argument 2: Not used. Stack Command: SSCF_UNI_DATA_IND Description: Indication that an assured SDU has been received from the SAAL peer. Argument 1: Pointer to an mbuf chain containing the peer's SDU. (struct mbuf *) Argument 2: Not used. Stack Command: SSCF_UNI_UNITDATA_IND Description: Indication that an unacknowledged SDU has been received from the SAAL peer. Argument 1: Pointer to an mbuf chain containing the peer's SDU. (struct mbuf *) Argument 2: Not used. Protocol Specifications ----------------------- For UNI_VERS_3_0, see Q.SAAL2. For UNI_VERS_3_1, see Q.2130. Implementation Limitations -------------------------- o The Parameter Data parameter is not supported for the following primitives: AAL-ESTABLISH request AAL-ESTABLISH indication AAL-ESTABLISH confirm AAL-RELEASE request AAL-RELEASE indication @(#) $Id: sscf.design,v 1.1.1.1 1996/12/04 20:48:17 mks Exp $