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ptp: Classify ptp over ip over vlan packets

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This extends the ptp bpf to also match ptp over ip over vlan packets. The ptp
classes are changed to orthogonal bitfields representing version, transport
and vlan values to simplify matching.

Signed-off-by: Stefan Sørensen <stefan.sorensen@spectralink.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stefan Sørensen
2014-06-27 11:59:10 +02:00
committed by David S. Miller
parent b9c701edc7
commit ae5c6c6d7b
4 changed files with 92 additions and 47 deletions
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24
drivers/net/ethernet/ti/cpts.c
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@@ -256,23 +256,21 @@ static int cpts_match(struct sk_buff *skb, unsigned int ptp_class,
u16 ts_seqid, u8 ts_msgtype)
{
u16 *seqid;
unsigned int offset;
unsigned int offset = 0;
u8 *msgtype, *data = skb->data;
switch (ptp_class) {
case PTP_CLASS_V1_IPV4:
case PTP_CLASS_V2_IPV4:
offset = ETH_HLEN + IPV4_HLEN(data) + UDP_HLEN;
if (ptp_class & PTP_CLASS_VLAN)
offset += VLAN_HLEN;
switch (ptp_class & PTP_CLASS_PMASK) {
case PTP_CLASS_IPV4:
offset += ETH_HLEN + IPV4_HLEN(data) + UDP_HLEN;
break;
case PTP_CLASS_V1_IPV6:
case PTP_CLASS_V2_IPV6:
offset = OFF_PTP6;
case PTP_CLASS_IPV6:
offset += ETH_HLEN + IP6_HLEN + UDP_HLEN;
break;
case PTP_CLASS_V2_L2:
offset = ETH_HLEN;
break;
case PTP_CLASS_V2_VLAN:
offset = ETH_HLEN + VLAN_HLEN;
case PTP_CLASS_L2:
offset += ETH_HLEN;
break;
default:
return 0;