On Tue, 2006-Sep-19 14:30:59 -0400, Jung-uk Kim wrote: >On Tuesday 19 September 2006 01:52 pm, John Baldwin wrote: >> Which I'm about to kill hopefully. Please let's fix this the right >> way and not hack it any further. > >Sure, no problem. But I don't think we can DTRT on -STABLE without >breaking API. Can we?
I've had a quick look into this problem because I extensively use VLANs on a bge and discovered that I no longer have VLAN tag details (which makes packet tracing a nuisance). As far as I can see, there is nothing preventing bpf_tap() and bpf_mtap2() being doctored to undo the VLAN detagging so that bpf_filter() is passed a mbuf chain that looks like an 802.1Q ethernet frame: Dummy up an mbuf (as bpf_mtap2() does) that contains the MAC addresses from the incoming data followed by the 802.1Q packet type and tag information, with m_next pointing to the byte after the MAC addresses in the original data. -- Peter Jeremy
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