- skb_get_timestamp(skb, &stamp);
- if (sock_flag(sk, SOCK_RCVTSTAMP)) {
- /* Race occurred between timestamp enabling and packet
- receiving. Fill in the current time for now. */
- if (stamp.tv_sec == 0)
- do_gettimeofday(&stamp);
- skb_set_timestamp(skb, &stamp);
- put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMP, sizeof(struct timeval),
- &stamp);
- } else
- sk->sk_stamp = stamp;
+ /*
+ * generate control messages if
+ * - receive time stamping in software requested (SOCK_RCVTSTAMP
+ * or SOCK_TIMESTAMPING_RX_SOFTWARE)
+ * - software time stamp available and wanted
+ * (SOCK_TIMESTAMPING_SOFTWARE)
+ * - hardware time stamps available and wanted
+ * (SOCK_TIMESTAMPING_SYS_HARDWARE or
+ * SOCK_TIMESTAMPING_RAW_HARDWARE)
+ */
+ if (sock_flag(sk, SOCK_RCVTSTAMP) ||
+ sock_flag(sk, SOCK_TIMESTAMPING_RX_SOFTWARE) ||
+ (kt.tv64 && sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE)) ||
+ (hwtstamps->hwtstamp.tv64 &&
+ sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE)) ||
+ (hwtstamps->syststamp.tv64 &&
+ sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE)))
+ __sock_recv_timestamp(msg, sk, skb);
+ else
+ sk->sk_stamp = kt;