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af_packet: pass checksum validation status to the user

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Introduce TP_STATUS_CSUM_VALID tp_status flag to tell the
af_packet user that at least the transport header checksum
has been already validated.

For now, the flag may be set for incoming packets only.

Signed-off-by: Alexander Drozdov <al.drozdov@gmail.com>
Cc: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Drozdov 2015-03-23 09:11:13 +03:00 • committed by David S. Miller
parent 68c2e5de36
commit 682f048bd4
3 changed files with 20 additions and 3 deletions
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1
include/uapi/linux/if_packet.h
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@ -99,6 +99,7 @@ struct tpacket_auxdata {
#define TP_STATUS_VLAN_VALID (1 << 4) /* auxdata has valid tp_vlan_tci */
#define TP_STATUS_BLK_TMO (1 << 5)
#define TP_STATUS_VLAN_TPID_VALID (1 << 6) /* auxdata has valid tp_vlan_tpid */
#define TP_STATUS_CSUM_VALID (1 << 7)
/* Tx ring - header status */
#define TP_STATUS_AVAILABLE 0