User guide

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DSI Development Package for Linux - Release Notes Release 6.4.0
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3.11 SCTP/SCTPD - Detection of path recovery
This release improves detection of SCTP path failure and restoration in a
multi-homed environment. It corrects an issue which in specific
circumstances resulted in failure to detect path recovery. Previously if path
failure was detected by lack of acknowledgement to a DATA element and no
subsequent DATA elements were transmitted then path recovery was not
detected. Transmission of a subsequent DATA element cleared the issue.
3.12 SCTP/SCTPD - Receipt of INIT on an active
association (IPY00099225)
This release corrects operation upon re-initialisation of an SCTP association
that has not been closed (ie. receipt of an INIT whilst association is active)
which previously caused the module to fail.
3.13 SCTP/SCTPD - Tracing received messages
This release includes the ability to trace data messages sent from SCTPD to
SCTP. The functionality can be enabled by setting the DATA_REQ (bit 5) in
the ip_evt_msg parameter within the SCTP_MSG_TRACE_MASK message
(0x5285)
3.14 SCTP/SCTPD – TSN Event Indications
This release adds support for additional diagnostic event indications using the
new SCTP_MSG_EVENT_IND (0x029e) message. The message status value
will include the Event Type value as shown below.
Event type
Value
Description
SCTP_EVT_UNEXP_EVENT
1
The retransmission list is invalid for the
association
SCTP_EVT_HIGH _TSN
2
Invalid SACK received with a TSN higher than
the expected range
SCTP_EVT_LOW_TSN
3
Invalid SACK received with a TSN lower than
the expected range
3.15 M2PA – Link Configuration Defaults
The M2PA Link Configuration message (M2P_MSG_LINK_CONFIG) now allows
timer values and congestion thresholds to be set to their default value by
setting the corresponding field in the message to zero. Default values are
defined in the M2PA Programmer’s Manual Issue 4.
3.16 M2PA – Timer Operation
This release corrects an issue with M3UA timers that could cause incorrect
timer duration. In addition T3 operation has been corrected so that on expiry
(during the proving period), the alignment cycle is aborted and the links goes
into the Out Of Service state.