flow_dissector: extract more ICMP information

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The ICMP flow dissector currently parses only the Type and Code fields.
Some ICMP packets (echo, timestamp) have a 16 bit Identifier field which
is used to correlate packets.
Add such field in flow_dissector_key_icmp and replace skb_flow_get_be16()
with a more complex function which populate this field.

Signed-off-by: Matteo Croce <mcroce@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Matteo Croce 2019-10-29 14:50:52 +01:00 • committed by David S. Miller

parent 3b336d6f4e

commit 5dec597e5c

2 changed files with 61 additions and 32 deletions

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19

include/net/flow_dissector.h

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74

net/core/flow_dissector.c

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