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flow dissector: ICMP support

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Allow dissection of ICMP(V6) type and code. This should only occur
if a packet is ICMP(V6) and the dissector has FLOW_DISSECTOR_KEY_ICMP set.

There are currently no users of FLOW_DISSECTOR_KEY_ICMP.
A follow-up patch will allow FLOW_DISSECTOR_KEY_ICMP to be used by
the flower classifier.

Signed-off-by: Simon Horman <simon.horman@netronome.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Simon Horman
2016-12-07 13:48:27 +01:00
committed by David S. Miller
parent 7cc99fd29b
commit 972d3876fa
2 changed files with 48 additions and 0 deletions
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17
include/net/flow_dissector.h
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@@ -104,6 +104,22 @@ struct flow_dissector_key_ports {
};
};
/**
* flow_dissector_key_icmp:
* @ports: type and code of ICMP header
* icmp: ICMP type (high) and code (low)
* type: ICMP type
* code: ICMP code
*/
struct flow_dissector_key_icmp {
union {
__be16 icmp;
struct {
u8 type;
u8 code;
};
};
};
/**
* struct flow_dissector_key_eth_addrs:
@@ -122,6 +138,7 @@ enum flow_dissector_key_id {
FLOW_DISSECTOR_KEY_IPV4_ADDRS, /* struct flow_dissector_key_ipv4_addrs */
FLOW_DISSECTOR_KEY_IPV6_ADDRS, /* struct flow_dissector_key_ipv6_addrs */
FLOW_DISSECTOR_KEY_PORTS, /* struct flow_dissector_key_ports */
FLOW_DISSECTOR_KEY_ICMP, /* struct flow_dissector_key_icmp */
FLOW_DISSECTOR_KEY_ETH_ADDRS, /* struct flow_dissector_key_eth_addrs */
FLOW_DISSECTOR_KEY_TIPC_ADDRS, /* struct flow_dissector_key_tipc_addrs */
FLOW_DISSECTOR_KEY_VLAN, /* struct flow_dissector_key_flow_vlan */