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Wireshark-users: Re: [Wireshark-users] Gr Interface

Date: Thu, 22 Feb 2007 17:13:35 +0100


You have to modify your test file to add an "ascii dump" at each end of
line, and to remove the lines containing a description
(see the attached text file).
Then you will have to convert the file with:
text2pcap -l 140 hex2.txt hex2.cap

The link layer for Gr interface is MTP2.

(See attached file: hex2.txt)(See attached file: hex2.cap)


                      "Cortes, Joseph"                                                                                            
                      <joseph.cortes@xxxxxxxxxxx         To:      <wireshark-users@xxxxxxxxxxxxx>, <wireshark-dev@xxxxxxxxxxxxx>  
                      >                                  cc:                                                                      
                      Sent by:                           Subject: [Wireshark-users] Gr Interface                                  
                      22/02/2007 12:33                                                                                            
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Totally new to the wireshark product:

I've captured the following on the Gr interface i.e. between the SGSN and
the HLR on a Nettest MPA 7300 and save the capture as hex only. (file

I've tried the text2pcap ? l 147 hex.txt hex.cap ( Not sure if this is what
I should be doing) this creates the hex.cap file.

C:\Programs\Wireshark>text2pcap -l 147 hex.txt hex.cap
Input from: hex.txt
Output to: hex.cap
Wrote packet of 15 bytes at 0
Wrote packet of 15 bytes at 15
Wrote packet of 15 bytes at 30
Wrote packet of 15 bytes at 45
Wrote packet of 15 bytes at 60
Wrote packet of 15 bytes at 75
Read 6 potential packets, wrote 6 packets

I open this file with wireshark, then under DLT user A I select the DLT=147
and the payload as gsm_map but I get

"DLT User A: No such proto: gsm_map"

How do I go about to decode this file??



If you have any questions or comments please let me know.

Kind Regards

Joseph Cortes

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Joseph Cortes
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 (See attached file: HEX.TXT)
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Attachment: hex2.txt
Description: Binary data

Attachment: hex2.cap
Description: Binary data

Attachment: HEX.TXT
Description: Binary data