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NGAP is not decoded how can i see details of message?

asked 2018-11-29 14:19:31 +0000

erhan gravatar image

updated 2018-11-29 15:03:34 +0000

grahamb gravatar image

Frame 215: 182 bytes on wire (1456 bits), 182 bytes captured (1456 bits) on interface 0

  Ethernet II, Src: 00:00:00:00:00:00 (00:00:00:00:00:00), Dst: 00:00:00:00:00:00 (00:00:00:00:00:00)

  Internet Protocol Version 4, Src: 127.0.0.1, Dst: 127.0.1.1

  Stream Control Transmission Protocol, Src Port: 56035 (56035), Dst Port: 38412 (38412)
    Source port: 56035
    Destination port: 38412
    Verification tag: 0x67eef5b4
    [Association index: 0]
    Checksum: 0x00000000 [unverified]
    [Checksum Status: Unverified]
    DATA chunk(ordered, complete segment, TSN: 2348454238, SID: 0, SSN: 0, PPID: 0, payload length: 117 bytes)
        Chunk type: DATA (0)
            0... .... = Bit: Stop processing of the packet
            .0.. .... = Bit: Do not report
        Chunk flags: 0x03
            .... ...1 = E-Bit: Last segment
            .... ..1. = B-Bit: First segment
            .... .0.. = U-Bit: Ordered delivery
            .... 0... = I-Bit: Possibly delay SACK
        Chunk length: 133
        Transmission sequence number: 2348454238
            [This chunk is acked in frame: 216]
                [The RTT to SACK was: 0.000008574 seconds]
        Stream identifier: 0x0000
        Stream sequence number: 0
        Payload protocol identifier: not specified (0)
        Chunk padding: 000000

  NG Application Protocol
    1... .... Extension Bit: True
    .0.. .... Small Number Bit: False
    Choice Extension Index: 32
    Open Type Length: 115
    Choice no. 32 in extension
        [Expert Info (Note/Undecoded): Choice no. 32 in extension]
            [Choice no. 32 in extension]
            [Severity level: Note]
            [Group: Undecoded]
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What version of Wireshark are you using and what version of the 3GPP Specification is your system using?

Anders gravatar imageAnders ( 2018-11-29 14:48:47 +0000 )edit

Hi Anders, I am using last development version of wireshark for ubuntu and last 3GPP spec version. When I set GUAMI I get malformed message error I think it is because spec version. But above message not includes Guami. Thanks.

erhan gravatar imageerhan ( 2018-11-29 15:03:53 +0000 )edit

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answered 2018-11-29 15:38:09 +0000

Anders gravatar image

updated 2018-11-29 15:38:30 +0000

The begining of the message looks broken or has private extensions? A message I have looks like:

NG Application Protocol 0... .... Extension Bit: False Min: 0 Range: 3 Bitfield length: 2 Bits: .00. .... decimal value: 0 Choice Index: 0 NGAP-PDU: initiatingMessage (0) initiatingMessage

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Thanks for your help. Problem is we used ber encode. We are going to use per encode and retry.

erhan gravatar imageerhan ( 2018-11-30 08:03:14 +0000 )edit

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Asked: 2018-11-29 14:19:31 +0000

Seen: 36 times

Last updated: Nov 29