Hi Ari, Can you open an issue on gitlab wireshark ? with a pcap and link to spec ?
Cheers On Wed, Jan 20, 2021 at 5:46 PM Ari Timonen <ari.timo...@synopsys.com> wrote: > Hello, > > The time synchronization protocol IEEE P802.1AS dissector does not parse > TLV flags correctly. > > The specification IEEE P802.1AS-Rev/D8.0 page 155 has the correct TLV > flags. > > 1. The computeNeighbourRateRatio is first bit not second. > > 2. The computeMeanLink delay is the second bit > 3. The oneStepReceiveCapable is the third bit. > 4. The computeNeighborPropDelay flag does not exist. > > It could be because the packet is dissected as PTP2 packet. > > Precision Time Protocol (IEEE1588) > > 0001 .... = transportSpecific: 0x1 > > ...1 .... = 802.1as conform: True > > .... 1100 = messageId: Signalling Message (0xc) > > 0001 .... = Reserved: 1 > > .... 0010 = versionPTP: 2 > > messageLength: 60 > > subdomainNumber: 0 > > Reserved: 0 > > flags: 0x0008 > > 0... .... .... .... = PTP_SECURITY: False > > .0.. .... .... .... = PTP profile Specific 2: False > > ..0. .... .... .... = PTP profile Specific 1: False > > .... .0.. .... .... = PTP_UNICAST: False > > .... ..0. .... .... = PTP_TWO_STEP: False > > .... ...0 .... .... = PTP_ALTERNATE_MASTER: False > > .... .... ..0. .... = FREQUENCY_TRACEABLE: False > > .... .... ...0 .... = TIME_TRACEABLE: False > > .... .... .... 1... = PTP_TIMESCALE: True > > .... .... .... .0.. = PTP_UTC_REASONABLE: False > > .... .... .... ..0. = PTP_LI_59: False > > .... .... .... ...0 = PTP_LI_61: False > > correction: 0.000000 nanoseconds > > correction: Ns: 0 nanoseconds > > correctionSubNs: 0 nanoseconds > > Reserved: 0 > > ClockIdentity: 0xacde48234567abcd > > SourcePortID: 1 > > sequenceId: 1 > > control: Sync Message (0) > > logMessagePeriod: 127 > > targetPortIdentity: 0xffffffffffffffff > > targetPortId: 65535 > > Message Interval Request TLV > > tlvType: Organization extension (3) > > lengthField: 12 > > organizationId: IEEE 802 (0x0080c2) > > OrganizationSubType: 2 > > linkDelayInterval: 13 > > timeSyncInterval: 14 > > announceInterval: 15 > > flags: 0x07 > > .... ..1. = computeNeighborRateRatio: True > > .... .1.. = computeNeighborPropDelay: True > > Yours, > Ari Timonen > ___________________________________________________________________________ > Sent via: Wireshark-dev mailing list <wireshark-dev@wireshark.org> > Archives: https://www.wireshark.org/lists/wireshark-dev > Unsubscribe: https://www.wireshark.org/mailman/options/wireshark-dev > mailto:wireshark-dev-requ...@wireshark.org > ?subject=unsubscribe
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