From f72de02ebece2e962462bc0c1e9efd29eaa029b2 Mon Sep 17 00:00:00 2001 From: Kurt Kanzenbach Date: Sat, 5 Mar 2022 12:21:25 +0100 Subject: ptp: Add generic PTP is_sync() function PHY drivers such as micrel or dp83640 need to analyze whether a given skb is a PTP sync message for one step functionality. In order to avoid code duplication introduce a generic function and move it to ptp classify. Signed-off-by: Kurt Kanzenbach Signed-off-by: David S. Miller --- net/core/ptp_classifier.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'net/core/ptp_classifier.c') diff --git a/net/core/ptp_classifier.c b/net/core/ptp_classifier.c index dd4cf01d1e0a..598041b0499e 100644 --- a/net/core/ptp_classifier.c +++ b/net/core/ptp_classifier.c @@ -137,6 +137,18 @@ struct ptp_header *ptp_parse_header(struct sk_buff *skb, unsigned int type) } EXPORT_SYMBOL_GPL(ptp_parse_header); +bool ptp_msg_is_sync(struct sk_buff *skb, unsigned int type) +{ + struct ptp_header *hdr; + + hdr = ptp_parse_header(skb, type); + if (!hdr) + return false; + + return ptp_get_msgtype(hdr, type) == PTP_MSGTYPE_SYNC; +} +EXPORT_SYMBOL_GPL(ptp_msg_is_sync); + void __init ptp_classifier_init(void) { static struct sock_filter ptp_filter[] __initdata = { -- cgit v1.2.3-59-g8ed1b