[ovs-dev] [PATCH 2/2] tunneling: Always use skb->len for PMTUD.

Ben Pfaff blp at nicira.com
Fri Feb 4 22:48:12 UTC 2011

On Fri, Feb 04, 2011 at 01:35:47PM -0800, Jesse Gross wrote:
> Currently IPv4 uses the length of the packet in the IP header
> and IPv6 uses actual length of the packet for path MTU discovery.
> This changes both to use the length of the packet to be consistent
> with each other and the the Linux IP stack and also to match what
> actually causes fragmentation.
> Signed-off-by: Jesse Gross <jesse at nicira.com>

Acked-by: Ben Pfaff <blp at nicira.com>

The formatting remains ugly, though.  Prettier version:

        packet_length = skb->len - ETH_HLEN;
        if (eth_hdr(skb)->h_proto == htons(ETH_P_8021Q))
                packet_length -= VLAN_HLEN;

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