[netflow-tools] CISCO HDLC Pcap format

Guanqun Lu guanqun.lu at gmail.com
Thu Mar 29 21:23:31 EST 2007

On 3/29/07, Damien Miller <djm at mindrot.org> wrote:
> On Wed, 21 Feb 2007, Víctor López Álvarez wrote:
> > I have tried to change from Pcap format to Netflow using softflowd but
> > it say me that the format I use is not support. However, I can extract
> > information using tcpdump, so I wonder why  softflowd say me that is an
> > unsupported datalink type.
> >
> > Anyone knows which is the reason?
> Because support for it has not been implemented.
> > Besides, how could I add the support for this header?
> Near the start of softflowd.c there is a definition of "struct DATALINK"
> and a table of supported datalink types "lt[]". struct DATALINK defines
> where in the layer-2 frame softflowd should look for the frame type, how
> to extract it and how to interpet it to determine whether a frame represents
> a IPv4 or IPv6 packet.
> Adding a new frame type to softflowd is as simple as adding an entry to
> this array.

I'm wondering whether it's easy to collect other packet information such as MPLS
and VPN.

> -d
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