• Herbert Xu's avatar
    [IPSEC]: Separate inner/outer mode processing on input · 227620e2
    Herbert Xu authored
    With inter-family transforms the inner mode differs from the outer
    mode.  Attempting to handle both sides from the same function means
    that it needs to handle both IPv4 and IPv6 which creates duplication
    and confusion.
    
    This patch separates the two parts on the input path so that each
    function deals with one family only.
    
    In particular, the functions xfrm4_extract_inut/xfrm6_extract_inut
    moves the pertinent fields from the IPv4/IPv6 IP headers into a
    neutral format stored in skb->cb.  This is then used by the inner mode
    input functions to modify the inner IP header.  In this way the input
    function no longer has to know about the outer address family.
    Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    227620e2
xfrm4_input.c 5.94 KB