[lkml]   [2008]   [Jul]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: TUN/TAP hacking
    Ignacy Gawedzki wrote:
    > I need some advice from network stack experts, so I hope this is the right
    > place to ask.

    The Linux kernel networking folks hang out at netdev
    ( I've CC'd them...

    > I thought I'd be able to use the TAP interfaces to create some sort of a
    > network emulator. For a start I just "bridged" two tap interfaces, much in
    > the same way as the example of br_select.c from , assigned
    > both interfaces different IPv4 addresses (both with a /32 prefix), set them up
    > and tried to transmit a UDP packet from one address to the other through the
    > bridge. Both logs from my bridge program and tcpdump tell me that the packets
    > are flowing as expected, but somehow the destination process doesn't get the
    > packets (despite all correct bind, etc).
    > Is it simply that the stack inconditionally drops any packet with the same
    > source (IP and/or MAC) address as some local interface?
    > As ARP resolution seems not to work either (I had to put permanent entries in
    > the neighbor table), I suppose this is the case indeed.
    > Could anyone confirm that? (please CC me, I've not subscribed)
    > Thanks,
    > Ignacy

    /--------------- - - - - - -
    | Dan Noé
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2008-07-24 04:39    [W:0.022 / U:110.632 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site