https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=3318
Rob Casey <robc@xxxxxxxxxxxxxxxxx> changed:
What |Removed |Added
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Attachment #3573| |review_for_checkin?
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AssignedTo|wireshark-bugs@xxxxxxxxxxxxx|robc@xxxxxxxxxxxxxxxxx
Status|NEW |ASSIGNED
--- Comment #2 from Rob Casey <robc@xxxxxxxxxxxxxxxxx> 2009-08-26 04:52:06 PDT ---
Created an attachment (id=3573)
--> (https://bugs.wireshark.org/bugzilla/attachment.cgi?id=3573)
Patch to correct parsing of DNP3 application control octet
Confirmed that current parsing of DNP3 application control octet ignores
unsolicited bit as described in DNP3Spec-V2-Part1-ApplicationLayer-20071215 and
initial bug report.
>From this DNP3 specification document:
The application control octet provides information needed to construct and
reassemble multiple fragment messages and to indicate whether the receiver’s
Application Layer must return an Application Layer confirmation message. It
also provides information to assist in duplicate message detection.
The bits in an application control octet form five fields.
Bit #
7 - FIR
6 - FIN
5 - CON
4 - UNS
3 >
2 >
1 >
0 > SEQ
Attached patch corrects parsing of application control octet and adds
dnp3.al.uns as permissible filter for matching of unsolicited DNP3 messages
only.
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