1998-09-15 08:23:17 +00:00
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CPCS Design
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===========
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SAP_CPCS Interface
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------------------
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This is the stack SAP interface between an AAL CPCS provider and an AAL CPCS
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user. The stack commands defined for this interface are modeled after the
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AAL3/4 and AAL5 protocol specification primitives CPCS-xxx. See the protocol
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specification documents referenced below for full descriptions of the CPCS
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interface.
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o The following stack commands are sent from a CPCS user to the CPCS provider:
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Stack Command: CPCS_INIT
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Description: Initialize a SAP instance. This should be the first stack
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command issued across the SAP instance after the service stack
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has been successfully instantiated.
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Argument 1: Not used.
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Argument 2: Not used.
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Stack Command: CPCS_TERM
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Description: Terminate a SAP instance. This must be the last stack command
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issued across the SAP instance. The stack instance will be
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deleted upon completion of this command.
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Argument 1: Not used.
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Argument 2: Not used.
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Stack Command: CPCS_UNITDATA_INV
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Description: Request that an SDU be sent to the remote AAL user.
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Argument 1: Pointer to an mbuf chain containing the user SDU.
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(struct mbuf *)
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Argument 2: Not used.
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Stack Command: CPCS_UABORT_INV
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Description: Not supported.
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Argument 1: N/A
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Argument 2: N/A
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o The following stack commands are sent from the CPCS provider to a CPCS user:
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Stack Command: CPCS_UNITDATA_SIG
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Description: Indication that an SDU has been received from the remote AAL
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user.
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Argument 1: Pointer to an mbuf chain containing the peer's SDU.
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(struct mbuf *)
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Argument 2: Not used.
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Stack Command: CPCS_UABORT_SIG
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Description: Not supported.
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Argument 1: N/A
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Argument 2: N/A
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Stack Command: CPCS_PABORT_SIG
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Description: Not supported.
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Argument 1: N/A
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Argument 2: N/A
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Protocol Specifications
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-----------------------
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See I.363.
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Implementation Limitations
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--------------------------
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o The CPCS-LP, CPCS-CI and CPCS-UU parameters are not supported.
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o The Streaming Mode service is not supported.
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o The Abort service is not supported.
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1999-08-28 00:22:10 +00:00
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@(#) $FreeBSD$
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1998-09-15 08:23:17 +00:00
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