Wireshark · Wireshark-bugs: [Wireshark-bugs] [Bug 9125] New: Wrong PROFINET frame id description for frame ids 0x8000 - 0xBBFF (

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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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