Wireshark-bugs: [Wireshark-bugs] [Bug 10280] New: FR decodes header correctly, but processes oct

Date: Sun, 13 Jul 2014 18:34:48 +0000
Bug ID 10280
Summary FR decodes header correctly, but processes octets after EA bit is set to '1'
Classification Unclassified
Product Wireshark
Version 1.10.7
Hardware x86
OS Windows 7
Status UNCONFIRMED
Severity Major
Priority Low
Component Dissection engine (libwireshark)
Assignee [email protected]
Reporter [email protected]

Created attachment 12894 [details]
capture of FR frame decoded beyond EA bit == 1

Build Information:
Paste the COMPLETE build information from "Help->About Wireshark", "wireshark
-v", or "tshark -v".
--
FR Header:
Address Field. Each address field may occupy either octet 2 to 3, octet 2 to 4,
or octet 2 to 5, depending on the range of the address in use. A two-octet
address field comprises the EA=ADDRESS FIELD EXTENSION BITS and the
C/R=COMMAND/RESPONSE BIT.  

Wireshark assumes a 4 octet header, and does not interpret the EA Bit
correctly:

Note the second octet has the EA bit set, therefore the following octets are
payload. Wireshark still pulls the next 2 octets as part of the FR header:


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