[ovs-git] Open vSwitch: packet: Match userspace and kernel definition of ICMP header. (branch-1.4)

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commit 71225d423b845d957f1feab55623ecf7afb39a0c
Diffs: http://openvswitch.org/cgi-bin/gitweb.cgi?p=openvswitch;a=commitdiff;h=71225d423b845d957f1feab55623ecf7afb39a0c
Author: Jesse Gross <jesse at nicira.com>
		
packet: Match userspace and kernel definition of ICMP header.
		
Current userspace considers an ICMP header to be 4 bytes consisting
of the type, code, and checksum.  The kernel considers it to be 8
bytes because it also counts the two data fields that contain
type-specific information (and are always present).  Since flow
extract will zero out headers that are not completely present this
means that an ICMP packet that has a header of 5-7 bytes will be
interpreted differently by userspace and kernel.  This fixes the
problem by adopting the kernel's version of the ICMP header in
userspace.

Signed-off-by: Jesse Gross <jesse at nicira.com>


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Summary of changes:
 lib/packets.h |   14 +++++++++++++-
 1 files changed, 13 insertions(+), 1 deletions(-)


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