Function EnableSWTimestamps

timestamp/timestamp_linux.go:161–172

EnableSWTimestamps enables SW timestamps (TX and RX) on the socket

(connFd int)

	flags := unix.SOF_TIMESTAMPING_TX_SOFTWARE |
		unix.SOF_TIMESTAMPING_RX_SOFTWARE |
		unix.SOF_TIMESTAMPING_SOFTWARE |
		unix.SOF_TIMESTAMPING_OPT_TSONLY // Makes the kernel return the timestamp as a cmsg alongside an empty packet, as opposed to alongside the original packet.
	// Allow reading of SW timestamps via socket
	if err := unix.SetsockoptInt(connFd, unix.SOL_SOCKET, timestamping, flags); err != nil {
		return err
	}

	return unix.SetsockoptInt(connFd, unix.SOL_SOCKET, unix.SO_SELECT_ERR_QUEUE, 1)
}

// EnableHWTimestamps enables HW timestamps (TX and RX) on the socket
func EnableHWTimestamps(connFd int, iface *net.Interface) error {
	rxFilter, err := ioctlHWTimestampCaps(connFd, iface.Name)
	if err != nil {
		return err