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    SubjectRe: SOCK_RAW does not receive broadcast (with VLAN unless PROMISC)
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    Patrick,
    On the specific NIC (eth1) no vlan is defined, and in the new Linux
    the application receive NOTHING at all. In order to debug, I start
    "wireshark as root" and "wireshark" set PROMISC on, and the
    application start receive the raw packets as expected. Later I started
    setting PROMISC by my application, and it can receive the packets even
    when "wireshark" is not running.
    The problem that I have with PROMISC mode, is that I need to do the
    irelevant unicast filtering in software rather than get it from the
    hardware (as it works in old kernel 2.6.20).
    Thanks a lot, Gil

    On Tue, Jun 9, 2009 at 2:40 PM, Patrick McHardy<kaber@trash.net> wrote:
    > Gil Beniamini wrote:
    >>
    >> 9Jun09, The problem was seen with eth1 using driver e1000e, but also
    >> was reproduced on 3c59x, to me it seems that the problem is not
    >> related to a specific nic driver.
    >> VLAN is running for other NICs, but on the application specific nic
    >> (eth1) I use PF_PACKET (SOCK_RAW) , in order to get  the raw-packet
    >> from the underlying device, and this start working again (like in
    >> older kernel) as soon as the application set the socket to PROMISC
    >> mode.
    >
    > OK, that might explain it. e1000e performs VLAN filtering in hardware
    > and unless there are VLANs configured locally, all VLANs are filtered
    > out. Are you seeing seeing only unicast VLAN traffic or no VLAN traffic
    > at all? Please post a dump of the packets with and without promiscous
    > mode.
    >
    >
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