The IEEE 1588 v2.1 standard introduces a new optional feature known as
slave event monitoring. This feature defines three new TLVs.
1. SLAVE_RX_SYNC_TIMING_DATA
This TLV provides the time stamps T1 and T2 from the message
exchange between master and slave.
2. SLAVE_TX_EVENT_TIMESTAMPS
This provides the T3 time stamp only.
3. SLAVE_RX_SYNC_COMPUTED_DATA
This TLV provides the estimated offset and path delay.
The standard leaves the mechanism for enabling and configuring this
feature as implementation-defined. This series implements slave
monitoring by offering a configuration option that specifies a UDS
address, allowing a local client such as the 'pmc' program to monitor
the time stamps.
While this series implements the first TLV verbatim, the second TLV
makes little sense as specified in the standard, because it omits the
T4 time stamp. For this reason a custom TLV is used that provides
both T3 and T4. The third TLV is not implemented here because it is
redundant, merely providing data already available in other management
messages.
Patches 1-5 implement the SLAVE_RX_SYNC_TIMING_DATA TLV in ptp4l, and
patch 6 adds that TLV into pmc.
Patches 7-9 then add the custom SLAVE_DELAY_TIMING_DATA_NP TLV into
ptp4l, and patch 10 adds it to pmc.
Richard Cochran (10):
tlv: Update macro definitions.
tlv: Encode and decode SLAVE_RX_SYNC_TIMING_DATA TLVs.
Introduce a module for slave event monitoring.
clock: Create a slave event monitor.
port: Support slave event monitoring of Sync timing data.
pmc: Show slave receive timing data TLVs attached to signaling
messages.
tlv: Encode and decode SLAVE_DELAY_TIMING_DATA_NP TLVs.
monitor: Add support for slave delay timing data TLV.
port: Support slave event monitoring of delay timing data.
pmc: Show slave delay timing data TLVs attached to signaling messages.
clock.c | 13 +++
clock.h | 8 ++
config.c | 1 +
makefile | 6 +-
monitor.c | 231 +++++++++++++++++++++++++++++++++++++++++++++++++
monitor.h | 25 ++++++
pmc.c | 86 ++++++++++++++++++
port.c | 25 +++++-
port_private.h | 3 +
ptp4l.8 | 6 ++
tlv.c | 163 +++++++++++++++++++++++++++++++++-
tlv.h | 67 ++++++++++++--
12 files changed, 620 insertions(+), 14 deletions(-)
create mode 100644 monitor.c
create mode 100644 monitor.h
--
2.20.1
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