Wireshark-bugs: [Wireshark-bugs] [Bug 1418] New: RTCP Parsing NTP

Date: Mon, 5 Mar 2007 16:37:29 +0000 (GMT)
http://bugs.wireshark.org/bugzilla/show_bug.cgi?id=1418

           Summary: RTCP Parsing NTP
           Product: Wireshark
           Version: unspecified
          Platform: PC
        OS/Version: Windows XP
            Status: NEW
          Severity: Normal
          Priority: Medium
         Component: Wireshark
        AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
        ReportedBy: brettcclark@xxxxxxxxxxx


Build Information:
wireshark 0.99.3 (SVN Rev 19011)

Copyright 1998-2006 Gerald Combs <gerald@xxxxxxxxxxxxx> and contributors.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Compiled with GTK+ 2.6.9, with GLib 2.6.6, with WinPcap (version unknown),
with libz 1.2.3, with libpcre 6.4, with Net-SNMP 5.3.1, with ADNS, with Lua
5.1.


Running with WinPcap version 3.1 (packet.dll version 3, 1, 0, 27), based on
libp
cap version 0.9[.x] on Windows XP Service Pack 2, build 2600.
--
When parsing the RTCP packets, the NTP timestamp (when available) has
extraneous values on occasion.  For instance, here is the byte data of the
packet:

0000  00 12 3f 1d b7 64 00 10  4b 9b fb 67 08 00 45 00   ..?..d.. K..g..E.
0010  00 68 79 d5 00 00 80 11  37 e3 c0 a8 03 91 c0 a8   .hy..... 7.......
0020  03 eb c0 07 80 77 00 54  68 21 81 c8 00 0c 00 00   .....w.T h!......
0030  7e 2f ea 5e 48 00 c7 b7  40 3c 00 00 95 06 00 00   ~/.^H... @<......
0040  00 b3 00 00 78 44 c6 45  28 88 00 00 00 00 00 00   ....xD.E (.......
0050  de e9 00 00 00 31 40 3c  9e 5d 00 00 4c 00 81 ca   .....1@< .]..L...
0060  00 05 00 00 7e 2f 01 00  06 09 49 4e 54 45 4c 20   ....~/.. ..INTEL 
0070  4c 44 50 00 00 00                                  LDP...           


It parses the NTP timestamp to be:

...
Timestamp, MSW: 3932047360 (0xea5e4800)
Timestamp, LSW: 3350675516 (0xc7b7403c)
MSW and LSW as NTP timestamp: Aug  7, 2024 19:22:40.7801 UTC
...


Is this correct?


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