mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-22 11:17:19 +00:00
130 lines
3.7 KiB
Plaintext
130 lines
3.7 KiB
Plaintext
|
|
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
|
|
|
|
|
|
@(#) $FreeBSD$
|
|
|