net: Implmement RFC 6936 (zero RX csums for UDP/IPv6)

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RFC 6936 relaxes the requirement of RFC 2460 that UDP/IPv6 packets which
are received with a zero UDP checksum value must be dropped. RFC 6936
allows zero checksums to support tunnels over UDP.

When sk_no_check is set we allow on a socket we allow a zero IPv6
UDP checksum. This is for both sending zero checksum and accepting
a zero checksum on receive.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Tom Herbert 2014-05-02 16:29:58 -07:00 • committed by David S. Miller

parent e4f45b7f40

commit 4068579e1e

2 changed files with 38 additions and 13 deletions

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18

net/ipv6/ip6_checksum.c

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33

net/ipv6/udp.c

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