Wireshark-bugs: [Wireshark-bugs] [Bug 9125] New: Wrong PROFINET frame id description for frame i
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Tue, 10 Sep 2013 08:12:11 +0000
Bug ID 9125
Summary Wrong PROFINET frame id description for frame ids 0x8000 - 0xBBFF (RT class 2 unicast)
Classification Unclassified
Product Wireshark
Version 1.10.1
Hardware All
OS All
Status UNCONFIRMED
Severity Normal
Priority Low
Component Dissection engine (libwireshark)
Assignee bugzilla-admin@wireshark.org
Reporter svkers@gmail.com 

Build Information:

--
The PROFINET IO dissector shows a wrong frame id description for captured
PROFINET frames with a frame id of 0x8000 - 0xBBFF. The frame id-range is used
for RT class 2, unicast frames and is not used for RT class 1, unicast frames
like shown by the dissector, see
http://www.softing.com/home/de/profinet/io-specification/real-time-data-exchange/frame-id.php
for a list of PROFINET frame ids.


The code producing the invalid description can be found in the file
packet-pn-rt.c in the function static void
dissect_pn_rt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree), line 591:

    else if (u16FrameID <= 0x7FFF) {
        pszProtShort    = "PN-RT";
        pszProtAddInfo  = "reserved, ";
        pszProtSummary  = "Real-Time";
        pszProtComment  = "0x1000-0x7FFF: Reserved ID";
        bCyclic         = FALSE;
    } else if (u16FrameID <= 0xBBFF) {
        pszProtShort    = "PN-RTC1";
        pszProtAddInfo  = "RTC1, ";
        pszProtSummary  = "cyclic Real-Time";
        pszProtComment  = "0x8000-0xBBFF: Real-Time(class=1 unicast): non
redundant, normal";
        bCyclic         = TRUE;
    }

The case (u16FrameID <= 0xBBFF) contains the wrong frame id description.

Best regards,
Sven

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