1. 25 May, 2007 2 commits
    • David S. Miller's avatar
      [XFRM]: Allow packet drops during larval state resolution. · 14e50e57
      David S. Miller authored
      The current IPSEC rule resolution behavior we have does not work for a
      lot of people, even though technically it's an improvement from the
      -EAGAIN buisness we had before.
      
      Right now we'll block until the key manager resolves the route.  That
      works for simple cases, but many folks would rather packets get
      silently dropped until the key manager resolves the IPSEC rules.
      
      We can't tell these folks to "set the socket non-blocking" because
      they don't have control over the non-block setting of things like the
      sockets used to resolve DNS deep inside of the resolver libraries in
      libc.
      
      With that in mind I coded up the patch below with some help from
      Herbert Xu which provides packet-drop behavior during larval state
      resolution, controllable via sysctl and off by default.
      
      This lays the framework to either:
      
      1) Make this default at some point or...
      
      2) Move this logic into xfrm{4,6}_policy.c and implement the
         ARP-like resolution queue we've all been dreaming of.
         The idea would be to queue packets to the policy, then
         once the larval state is resolved by the key manager we
         re-resolve the route and push the packets out.  The
         packets would timeout if the rule didn't get resolved
         in a certain amount of time.
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      14e50e57
    • David S. Miller's avatar
      04efb878
  2. 24 May, 2007 38 commits