221 lines
6.7 KiB
Plaintext
221 lines
6.7 KiB
Plaintext
|
|
SSCOP Design
|
|
============
|
|
|
|
SAP_SSCOP Interface
|
|
-------------------
|
|
This is the stack SAP interface between the SSCOP module and an SSCOP user
|
|
module (eg. SSCF). The stack commands defined for this interface are modeled
|
|
after the SSCOP protocol specification primitives AA-xxx. See the protocol
|
|
specification documents referenced below for full descriptions of the SSCOP
|
|
interface presented to an SSCF.
|
|
|
|
|
|
o The following stack commands are sent from an SSCF to SSCOP:
|
|
|
|
Stack Command: SSCOP_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 SSCOP version to be used for this stack instance.
|
|
(enum sscop_vers)
|
|
Argument 2: Pointer to a structure containing the SSCOP protocol parameter
|
|
values to be used for this instance. (struct sscop_parms *)
|
|
|
|
|
|
Stack Command: SSCOP_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: SSCOP_ESTABLISH_REQ
|
|
Description: Request the establishment of an SSCOP connection for assured
|
|
information transfer to the remote peer entity.
|
|
Argument 1: Pointer to an mbuf chain containing any SSCOP User-to-User
|
|
Information (SSCOP-UU / UUI) data to be sent to the peer.
|
|
Must be coded as SSCOP_UU_NULL. (struct mbuf *)
|
|
Argument 2: Buffer Release (BR) parameter. Must be coded as SSCOP_BR_YES.
|
|
(int)
|
|
|
|
|
|
Stack Command: SSCOP_ESTABLISH_RSP
|
|
Description: Response indicating that an SSCOP connection establishment
|
|
request from the remote peer is acceptable.
|
|
Argument 1: Pointer to an mbuf chain containing any SSCOP User-to-User
|
|
Information (SSCOP-UU / UUI) data to be sent to the peer.
|
|
Must be coded as SSCOP_UU_NULL. (struct mbuf *)
|
|
Argument 2: Buffer Release (BR) parameter. Must be coded as SSCOP_BR_YES.
|
|
(int)
|
|
|
|
|
|
Stack Command: SSCOP_RELEASE_REQ
|
|
Description: Request the termination of an SSCOP connection with the
|
|
remote peer entity.
|
|
Argument 1: Pointer to an mbuf chain containing any SSCOP User-to-User
|
|
Information (SSCOP-UU / UUI) data to be sent to the peer.
|
|
Must be coded as SSCOP_UU_NULL. (struct mbuf *)
|
|
Argument 2: Not used.
|
|
|
|
|
|
Stack Command: SSCOP_DATA_REQ
|
|
Description: Request that an assured SDU be sent to the remote peer.
|
|
Argument 1: Pointer to an mbuf chain containing the user SDU.
|
|
(struct mbuf *)
|
|
Argument 2: Not used.
|
|
|
|
|
|
Stack Command: SSCOP_RESYNC_REQ
|
|
Description: Request the resynchronization of an SSCOP connection.
|
|
Argument 1: Pointer to an mbuf chain containing any SSCOP User-to-User
|
|
Information (SSCOP-UU / UUI) data to be sent to the peer.
|
|
Must be coded as SSCOP_UU_NULL. (struct mbuf *)
|
|
Argument 2: Not used.
|
|
|
|
|
|
Stack Command: SSCOP_RESYNC_RSP
|
|
Description: Acknowledge the remote peer's resynchronization of an SSCOP
|
|
connection.
|
|
Argument 1: Not used.
|
|
Argument 2: Not used.
|
|
|
|
|
|
Stack Command: SSCOP_RECOVER_RSP (Q.2110 only)
|
|
Description: Acknowledge the indication that the SSCOP connection has
|
|
recovered from SSCOP protocol errors.
|
|
Argument 1: Not used.
|
|
Argument 2: Not used.
|
|
|
|
|
|
Stack Command: SSCOP_UNITDATA_REQ
|
|
Description: Request that an unacknowledged SDU be sent to the remote peer.
|
|
Argument 1: Pointer to an mbuf chain containing the user SDU.
|
|
(struct mbuf *)
|
|
Argument 2: Not used.
|
|
|
|
|
|
Stack Command: SSCOP_RETRIEVE_REQ
|
|
Description: Not supported.
|
|
Argument 1: N/A
|
|
Argument 2: N/A
|
|
|
|
|
|
o The following stack commands are sent from SSCOP to an SSCF:
|
|
|
|
Stack Command: SSCOP_ESTABLISH_IND
|
|
Description: Indication that a request to establish an SSCOP connection has
|
|
been received from the remote peer entity.
|
|
Argument 1: Pointer to an mbuf chain containing any SSCOP User-to-User
|
|
Information (SSCOP-UU / UUI) data received from the peer.
|
|
(struct mbuf *)
|
|
Argument 2: Source of establish request (Q.SAAL1 only). Valid values are
|
|
SSCOP_SOURCE_SSCOP or SSCOP_SOURCE_USER. (int)
|
|
|
|
|
|
Stack Command: SSCOP_ESTABLISH_CNF
|
|
Description: Confirmation from the remote peer of an SSCOP connection
|
|
establishment, previously requested via an SSCOP_ESTABLISH_REQ
|
|
command.
|
|
Argument 1: Pointer to an mbuf chain containing any SSCOP User-to-User
|
|
Information (SSCOP-UU / UUI) data received from the peer.
|
|
(struct mbuf *)
|
|
Argument 2: Not used.
|
|
|
|
|
|
Stack Command: SSCOP_RELEASE_IND
|
|
Description: Indication that an SSCOP connection has been terminated by
|
|
the remote peer entity.
|
|
Argument 1: Pointer to an mbuf chain containing any SSCOP User-to-User
|
|
Information (SSCOP-UU / UUI) data received from the peer.
|
|
(struct mbuf *)
|
|
Argument 2: Source of release request. Valid values are SSCOP_SOURCE_SSCOP
|
|
or SSCOP_SOURCE_USER. (int)
|
|
|
|
|
|
Stack Command: SSCOP_RELEASE_CNF
|
|
Description: Confirmation from the remote peer of an SSCOP connection
|
|
termination, previously requested via an SSCOP_RELEASE_REQ
|
|
command.
|
|
Argument 1: Not used.
|
|
Argument 2: Not used.
|
|
|
|
|
|
Stack Command: SSCOP_DATA_IND
|
|
Description: Indication that an assured SDU has been received from the
|
|
remote peer.
|
|
Argument 1: Pointer to an mbuf chain containing the peer's SDU.
|
|
(struct mbuf *)
|
|
Argument 2: Sequence number of the received SDU. (sscop_seq)
|
|
|
|
|
|
Stack Command: SSCOP_RESYNC_IND
|
|
Description: Indication that the remote peer has requested the
|
|
resynchronization of the SSCOP connection.
|
|
Argument 1: Pointer to an mbuf chain containing any SSCOP User-to-User
|
|
Information (SSCOP-UU / UUI) data received from the peer.
|
|
(struct mbuf *)
|
|
Argument 2: Not used.
|
|
|
|
|
|
Stack Command: SSCOP_RESYNC_CNF
|
|
Description: Confirmation from the remote peer that an SSCOP connection
|
|
has been resynchronized.
|
|
Argument 1: Not used.
|
|
Argument 2: Not used.
|
|
|
|
|
|
Stack Command: SSCOP_RECOVER_IND (Q.2110 only)
|
|
Description: Indication that an SSCOP connection has recovered from SSCOP
|
|
protocol errors.
|
|
Argument 1: Not used.
|
|
Argument 2: Not used.
|
|
|
|
|
|
Stack Command: SSCOP_UNITDATA_IND
|
|
Description: Indication that an unacknowledged SDU has been received from
|
|
the remote peer.
|
|
Argument 1: Pointer to an mbuf chain containing the peer's SDU.
|
|
(struct mbuf *)
|
|
Argument 2: Not used.
|
|
|
|
|
|
Stack Command: SSCOP_RETRIEVE_IND
|
|
Description: Not supported.
|
|
Argument 1: N/A
|
|
Argument 2: N/A
|
|
|
|
|
|
Stack Command: SSCOP_RETRIEVECMP_IND
|
|
Description: Not supported.
|
|
Argument 1: N/A
|
|
Argument 2: N/A
|
|
|
|
|
|
|
|
Protocol Specifications
|
|
-----------------------
|
|
For SSCOP_VERS_QSAAL, see Q.SAAL1.
|
|
For SSCOP_VERS_Q2110, see Q.2110.
|
|
|
|
|
|
|
|
Implementation Limitations
|
|
--------------------------
|
|
o The following signals are not supported:
|
|
AA-RETRIEVE
|
|
AA-RETRIEVE COMPLETE
|
|
AA-RELEASEBUF (Q.SAAL1 only)
|
|
MAA-UNITDATA
|
|
|
|
o Does not support sending the SSCOP-UU/UUI parameter, must be set to NULL
|
|
|
|
o For the AA-ESTABLISH request and response signals, only BR=YES is supported
|
|
|
|
o For the AA-DATA request signal, only PR=NO is supported (Q.SAAL1 only)
|
|
|
|
|
|
@(#) $FreeBSD$
|
|
|