Change in libosmo-abis[master]: Configure E1 pcap file per line

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laforge gerrit-no-reply at lists.osmocom.org
Fri Nov 13 11:47:58 UTC 2020


laforge has posted comments on this change. ( https://gerrit.osmocom.org/c/libosmo-abis/+/21118 )

Change subject: Configure E1 pcap file per line
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Patch Set 5:

I thought I had commented on this already, bt it seems I missed it somehow?

Having one pcap file per line is a work-around to the problem.  We could merge that patch now, but I think the proper solution really would be to write a pcap-ng file which allows us to identify to which interface each packet belonged.

Now the question is: Do we want to merge this patch, knowing it will introduce configuration syntax
which likely would be obsoleted once wed'd write a pcap-ng file?  I'm a bit undecided.  It of course depends how long it will take for somebody (likely me?) to impleemnt that pcap-ng writing.

In terms of usability I think most people would want to have a single pcap file that shows all the traffic in one time-line, rather than generating multiple separate pcap files that one has to look at individually.   For the "one line" case we'd probably have to introdcue some kind of filter?

In the end, i'ts actually a real pity that we went for "dahdi file desccriptor" approach, rather than a hdlcX netdev based approach (as we are doing now for frame relay support in NS2).  If every signaling slot was a hdlcX netdevice (DAHDI can do that!), users could just do pcap/tshark/wireshark on those devices, rather than us having to invent mechanisms to write pcap[ng] by hand.  But well, we've done it this way since 2008 and it's too late to fundamentally change libosmo-abis now.


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Gerrit-Project: libosmo-abis
Gerrit-Branch: master
Gerrit-Change-Id: I316c3d6a839e84c2f52a148c6b8dd6f5933cf4bf
Gerrit-Change-Number: 21118
Gerrit-PatchSet: 5
Gerrit-Owner: keith <keith at rhizomatica.org>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: keith <keith at rhizomatica.org>
Gerrit-Reviewer: pespin <pespin at sysmocom.de>
Gerrit-CC: fixeria <vyanitskiy at sysmocom.de>
Gerrit-CC: laforge <laforge at osmocom.org>
Gerrit-Comment-Date: Fri, 13 Nov 2020 11:47:58 +0000
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