Hi Dinesh,
I don't think details about how the PDUs were framed were posted in the
previous discussion, so this is more of a dev question at the moment.
Here are the extra pieces of information that MAC dissector currently
uses to help with the decode (this is taken from
epan/dissectors/packet-mac-lte.h) :
/* radioType */
#define FDD_RADIO 1
#define TDD_RADIO 2
/* direction */
#define DIRECTION_UPLINK 0
#define DIRECTION_DOWNLINK 1
/* rntiType */
#define NO_RNTI 0
#define P_RNTI 1
#define RA_RNTI 2
#define C_RNTI 3
#define SI_RNTI 4
/* Context info attached to each LTE MAC frame */
typedef struct mac_lte_info
{
/* Needed for decode */
guint8 radioType;
guint8 direction;
guint8 rntiType;
/* Extra info to display */
guint16 rnti;
guint16 ueid;
guint16 subframeNumber;
guint8 isPredefinedData;
guint16 length;
guint8 reTxCount;
} mac_lte_info;
So you'd need to define a header format that encoded some or all of these fields before each frame. A simple dissector would:
- read the header
- allocate a mac_lte_info struct and attach it to the frame
- call the mac-lte dissector for the payload
For help with this see the function attach_mac_lte_info() in epan/dissectors/packet-catapult-dct2000.c
If you could provide details of how you're framing these PDUs and could
provide a sample capture, I should be able to help develop a simple
dissector that calls mac-lte.
Best regards,
Martin
On Tue, Mar 17, 2009 at 11:19 PM, Dinesh Arora
<dineshk_arora@xxxxxxxxx> wrote:
|
Hi,
I am new to WireShark tool and joined this mailing list recently.
I have seen some discussion in the list related to LTE-MAC/RLC/PDCP packet layers monitoring using TCP port 9999. Can you please let me know some sample packet formats that I can inject inside TCP packet containing some LTE MAC PDUs and then see the live capture in WireShark?
I want to make a tool that sends LTE MAC PDUs over TCP and this format will help me in understanding that how it will be decoded by WireShark? Unfortunately, Wiki does not have info related to the same.
Thanks in Advance.
Regards,
Dinesh |
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