How to remove previous layers from M3UA pcap?












0















I have a MTP3 pcap file that when I open in Wireshark shows



Frame1
Ethernet
IPV4
MTP2
MTP3
SCCP
TCAP
GSM MAP



I was able to modify the byte 20-23 that is the link-layer header type where in the original file was 01 00 00 00 that is 1=Ethernet. So, I modified from 01 00 00 00 to 8D 00 00 00, where 8D = 141 = MTP3 (http://www.tcpdump.org/linktypes.html)



D4 C3 B2 A1 02 00 04 00 00 00 00 00 00 00 00 00 00 00 04 00 8D 00 00 00 


After doing this and removing ethernet, IPV4 and MTP2 bytes the file was successfully understood by Wireshark showing only the following layers.



Frame1
MTP3
SCCP
TCAP
GSM MAP



Now I have another file that has the following layers:



Frame1
Ethernet
IPV4
SCTP
M3UA
SCCP
TCAP
GSM MAP



and I like to remove the ethernet, IPV4 and SCTP layers or at least ethernet and IPV4. I did similar changing the byte 20 from 01=Ethernet to F8 = 248 = SCTP and removing bytes for Ethernet, IPV4 but when I open the file in Wireshark this time says Malformed packet or gives error and cannot be opened.



I would like to get a file that shows only these layers.



Frame1
SCTP
M3UA
SCCP
TCAP
GSM MAP



or



Frame1
M3UA
SCCP
TCAP
GSM MAP



It is possible to do this?










share|improve this question



























    0















    I have a MTP3 pcap file that when I open in Wireshark shows



    Frame1
    Ethernet
    IPV4
    MTP2
    MTP3
    SCCP
    TCAP
    GSM MAP



    I was able to modify the byte 20-23 that is the link-layer header type where in the original file was 01 00 00 00 that is 1=Ethernet. So, I modified from 01 00 00 00 to 8D 00 00 00, where 8D = 141 = MTP3 (http://www.tcpdump.org/linktypes.html)



    D4 C3 B2 A1 02 00 04 00 00 00 00 00 00 00 00 00 00 00 04 00 8D 00 00 00 


    After doing this and removing ethernet, IPV4 and MTP2 bytes the file was successfully understood by Wireshark showing only the following layers.



    Frame1
    MTP3
    SCCP
    TCAP
    GSM MAP



    Now I have another file that has the following layers:



    Frame1
    Ethernet
    IPV4
    SCTP
    M3UA
    SCCP
    TCAP
    GSM MAP



    and I like to remove the ethernet, IPV4 and SCTP layers or at least ethernet and IPV4. I did similar changing the byte 20 from 01=Ethernet to F8 = 248 = SCTP and removing bytes for Ethernet, IPV4 but when I open the file in Wireshark this time says Malformed packet or gives error and cannot be opened.



    I would like to get a file that shows only these layers.



    Frame1
    SCTP
    M3UA
    SCCP
    TCAP
    GSM MAP



    or



    Frame1
    M3UA
    SCCP
    TCAP
    GSM MAP



    It is possible to do this?










    share|improve this question

























      0












      0








      0








      I have a MTP3 pcap file that when I open in Wireshark shows



      Frame1
      Ethernet
      IPV4
      MTP2
      MTP3
      SCCP
      TCAP
      GSM MAP



      I was able to modify the byte 20-23 that is the link-layer header type where in the original file was 01 00 00 00 that is 1=Ethernet. So, I modified from 01 00 00 00 to 8D 00 00 00, where 8D = 141 = MTP3 (http://www.tcpdump.org/linktypes.html)



      D4 C3 B2 A1 02 00 04 00 00 00 00 00 00 00 00 00 00 00 04 00 8D 00 00 00 


      After doing this and removing ethernet, IPV4 and MTP2 bytes the file was successfully understood by Wireshark showing only the following layers.



      Frame1
      MTP3
      SCCP
      TCAP
      GSM MAP



      Now I have another file that has the following layers:



      Frame1
      Ethernet
      IPV4
      SCTP
      M3UA
      SCCP
      TCAP
      GSM MAP



      and I like to remove the ethernet, IPV4 and SCTP layers or at least ethernet and IPV4. I did similar changing the byte 20 from 01=Ethernet to F8 = 248 = SCTP and removing bytes for Ethernet, IPV4 but when I open the file in Wireshark this time says Malformed packet or gives error and cannot be opened.



      I would like to get a file that shows only these layers.



      Frame1
      SCTP
      M3UA
      SCCP
      TCAP
      GSM MAP



      or



      Frame1
      M3UA
      SCCP
      TCAP
      GSM MAP



      It is possible to do this?










      share|improve this question














      I have a MTP3 pcap file that when I open in Wireshark shows



      Frame1
      Ethernet
      IPV4
      MTP2
      MTP3
      SCCP
      TCAP
      GSM MAP



      I was able to modify the byte 20-23 that is the link-layer header type where in the original file was 01 00 00 00 that is 1=Ethernet. So, I modified from 01 00 00 00 to 8D 00 00 00, where 8D = 141 = MTP3 (http://www.tcpdump.org/linktypes.html)



      D4 C3 B2 A1 02 00 04 00 00 00 00 00 00 00 00 00 00 00 04 00 8D 00 00 00 


      After doing this and removing ethernet, IPV4 and MTP2 bytes the file was successfully understood by Wireshark showing only the following layers.



      Frame1
      MTP3
      SCCP
      TCAP
      GSM MAP



      Now I have another file that has the following layers:



      Frame1
      Ethernet
      IPV4
      SCTP
      M3UA
      SCCP
      TCAP
      GSM MAP



      and I like to remove the ethernet, IPV4 and SCTP layers or at least ethernet and IPV4. I did similar changing the byte 20 from 01=Ethernet to F8 = 248 = SCTP and removing bytes for Ethernet, IPV4 but when I open the file in Wireshark this time says Malformed packet or gives error and cannot be opened.



      I would like to get a file that shows only these layers.



      Frame1
      SCTP
      M3UA
      SCCP
      TCAP
      GSM MAP



      or



      Frame1
      M3UA
      SCCP
      TCAP
      GSM MAP



      It is possible to do this?







      wireshark layers pcap






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Jan 22 at 21:44









      Ger CasGer Cas

      1062




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