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authorKurt Kanzenbach <kurt@linutronix.de>2022-03-05 12:21:25 +0100
committerDavid S. Miller <davem@davemloft.net>2022-03-07 11:31:34 +0000
commitf72de02ebece2e962462bc0c1e9efd29eaa029b2 (patch)
tree5a7102eaf367b9301bf49c8d9d6ca328a016fad5 /net/core/ptp_classifier.c
parent669b258a793db9f1c3bff29ce2bbd61b810503ad (diff)
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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 <kurt@linutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/ptp_classifier.c')
-rw-r--r--net/core/ptp_classifier.c12
1 files changed, 12 insertions, 0 deletions
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 = {