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>
return msgtype;
}
+/**
+ * ptp_msg_is_sync - Evaluates whether the given skb is a PTP Sync message
+ * @skb: packet buffer
+ * @type: type of the packet (see ptp_classify_raw())
+ *
+ * This function evaluates whether the given skb is a PTP Sync message.
+ *
+ * Return: true if sync message, false otherwise
+ */
+bool ptp_msg_is_sync(struct sk_buff *skb, unsigned int type);
+
void __init ptp_classifier_init(void);
#else
static inline void ptp_classifier_init(void)
*/
return PTP_MSGTYPE_SYNC;
}
+static inline bool ptp_msg_is_sync(struct sk_buff *skb, unsigned int type)
+{
+ return false;
+}
#endif
#endif /* _PTP_CLASSIFY_H_ */
}
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 = {