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author | David S. Miller <davem@davemloft.net> | 2012-06-28 03:59:11 -0700 |
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committer | David S. Miller <davem@davemloft.net> | 2012-06-28 03:59:11 -0700 |
commit | 35ebf65e851c6d9731abc6362b189858eb59f4d3 (patch) | |
tree | 2e78c2c81bc72aeeb172484996cdff268f0111a2 /virt/kvm/Kconfig | |
parent | 70e7341673a47fb1525cfc7d6651cc98b5348928 (diff) |
ipv4: Create and use fib_compute_spec_dst() helper.
The specific destination is the host we direct unicast replies to.
Usually this is the original packet source address, but if we are
responding to a multicast or broadcast packet we have to use something
different.
Specifically we must use the source address we would use if we were to
send a packet to the unicast source of the original packet.
The routing cache precomputes this value, but we want to remove that
precomputation because it creates a hard dependency on the expensive
rpfilter source address validation which we'd like to make cheaper.
There are only three places where this matters:
1) ICMP replies.
2) pktinfo CMSG
3) IP options
Now there will be no real users of rt->rt_spec_dst and we can simply
remove it altogether.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'virt/kvm/Kconfig')
0 files changed, 0 insertions, 0 deletions