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xen-netback: fix fragment detection in checksum setup

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The code to detect fragments in checksum_setup() was missing for IPv4 and
too eager for IPv6. (It transpires that Windows seems to send IPv6 packets
with a fragment header even if they are not a fragment - i.e. offset is zero,
and M bit is not set).

This patch also incorporates a fix to callers of maybe_pull_tail() where
skb->network_header was being erroneously added to the length argument.

Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Signed-off-by: Zoltan Kiss <zoltan.kiss@citrix.com>
Cc: Wei Liu <wei.liu2@citrix.com>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: David Vrabel <david.vrabel@citrix.com>
cc: David Miller <davem@davemloft.net>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paul Durrant
2013-12-03 17:39:29 +00:00
committed by David S. Miller
parent df48ada4f8
commit 1431fb31ec
3 changed files with 136 additions and 96 deletions
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3
include/net/ipv6.h
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@@ -110,7 +110,8 @@ struct frag_hdr {
__be32 identification;
};
#define IP6_MF 0x0001
#define IP6_MF 0x0001
#define IP6_OFFSET 0xFFF8
#include <net/sock.h>