Skip to content
  • Masahide NAKAMURA's avatar
    [IPV4] IPSEC: Omit redirect for tunnelled packet. · 3b26a9a6
    Masahide NAKAMURA authored
    IPv4 IPsec tunnel gateway incorrectly sends redirect to
    sender if it is onlink host when network device the IPsec tunnelled
    packet is arrived is the same as the one the decapsulated packet
    is sent.
    With this patch, it omits to send the redirect when the forwarding
    skbuff carries secpath, since such skbuff should be assumed as
    a decapsulated packet from IPsec tunnel by own.
    Request for comments:
    Alternatively we'd have another way to change net/ipv4/route.c
    (__mkroute_input) to use RTCF_DOREDIRECT flag unless skbuff
    has no secpath. It is better than this patch at performance
    point of view because IPv4 redirect judgement is done at
    routing slow-path. However, it should be taken care of resource
    changes between SAD(XFRM states) and routing table. In other words,
    When IPv4 SAD is changed does the related routing entry go to its
    slow-path? If not, it is reasonable to apply this patch.
    Signed-off-by: default avatarMasahide NAKAMURA <>
    Signed-off-by: default avatarDavid S. Miller <>