Wireshark · Wireshark-bugs: [Wireshark-bugs] [Bug 8631] New: RFC 6887 Port Control Protocol Response 96 bit reserved not 64 bit

[bugzilla-daemon@xxxxxxxxxxxxx]

Bug ID	8631
Summary	RFC 6887 Port Control Protocol Response 96 bit reserved not 64 bit
Classification	Unclassified
Product	Wireshark
Version	SVN
Hardware	x86
OS	Mac OS X 10.8
Status	UNCONFIRMED
Severity	Normal
Priority	Low
Component	Dissection engine (libwireshark)
Assignee	bugzilla-admin@wireshark.org
Reporter	christian@koenning.org

Build Information:

--
PROBLEM
=======
as per RFC 6887 the response header has 96bit reserved bit, not 64. 
Without the attached patch, the PCP Responses are parsed incorrectly

to fix this, the reserved bit range needs to be extended from 8 to 12 bytes, as
per patch attached

7.2.  Response Header

   All responses have the following format:

      0                   1                   2                   3
      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |  Version = 2  |R|   Opcode    |   Reserved    |  Result Code  |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |                      Lifetime (32 bits)                       |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |                     Epoch Time (32 bits)                      |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |                                                               |
     |                      Reserved (96 bits)                       |
     |                                                               |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     :                                                               :
     :             (optional) Opcode-specific response data          :
     :                                                               :
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     :             (optional) Options                                :
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

                  Figure 3: Common Response Packet Format

Further information on PCP dissector
====================================
Will supply further patch/bug to honour the Response Bit/Opcode implementation,
as e.g. a map response opcode is not 129 as per 1000 0001 but should be 
Response bit =1 / Opcode =1.

---

      You are receiving this mail because:

• You are watching all bug changes.