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Re: Request for new LINKTYPE_* code LINKTYPE_AUERSWALD_LOG


From: developer--- via tcpdump-workers <tcpdump-workers () lists tcpdump org>
Date: Thu, 4 Feb 2021 11:41:48 +0000

--- Begin Message --- From: "developer () auerswald de" <developer () auerswald de>
Date: Thu, 4 Feb 2021 11:41:48 +0000
Hi,
We currently use this code in our lua dissector to display (decoded) SIP messages.

-- offsets will change with the new LINKTYPE
    if (buf(148,2):uint() == MSG_TYPE_SIP) then
        sadd("src_ip",0,16)
        sadd("src_port",16,2,"uint")
        sadd("dst_ip", 18,16)
        sadd("dst_port",34,2,"uint")
        Dissector.get("sip"):call(buf(msg_start, msg_len):tvb(), pinfo, subtree)
        return
    end

We could theoretically use a different LINKTYPE_ that would just contain the same SIP information, however it would 
cause major changes for us, due to the way logging is realized in our systems.
We had to adapt a legacy logging interface that does not allow us to put those packages into a different LINKLAYER_ 
without some major redesign, for which I do not see any time in the near future.
The pcapng interface we provide only combines network traffic with that one logging stream.

Best regards
Frank Gorgas-Waller

________________________________
Von: Anders Broman <anders.broman () ericsson com>
Gesendet: Donnerstag, 4. Februar 2021 10:32:51
An: Michael Richardson; developer () auerswald de
Cc: tcpdump-workers () lists tcpdump org
Betreff: Re: [tcpdump-workers] Request for new LINKTYPE_* code LINKTYPE_AUERSWALD_LOG

Hi,
You should perhaps take a look at the exported plus link type and wireshark sources. It may be doing similar things. 
New tags could be added.
Regards
Anders

Hämta Outlook för Android<https://aka.ms/ghei36>

________________________________
From: tcpdump-workers <tcpdump-workers-bounces () lists tcpdump org> on behalf of developer--- via tcpdump-workers 
<tcpdump-workers () lists tcpdump org>
Sent: Thursday, February 4, 2021 10:25:07 AM
To: Michael Richardson <mcr () sandelman ca>
Cc: tcpdump-workers () lists tcpdump org <tcpdump-workers () lists tcpdump org>
Subject: Re: [tcpdump-workers] Request for new LINKTYPE_* code LINKTYPE_AUERSWALD_LOG

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