/**
	 * @brief  Gets TLV value in a byte string format
	 * @param  byte_str [out] Output byte string
	 * @return void
	 */
	void toByteString(uint8_t * byte_str) {
		IdentityList::iterator iter;
		*((uint16_t *)byte_str) = tlvType;  // tlvType already in network byte order
		byte_str += sizeof(tlvType);
		*((uint16_t *)byte_str) = PLAT_htons
			((uint16_t)identityList.size()*PTP_CLOCK_IDENTITY_LENGTH);
		byte_str += sizeof(uint16_t);
		for
			(iter = identityList.begin();
			 iter != identityList.end(); ++iter) {
			iter->getIdentityString(byte_str);
			byte_str += PTP_CLOCK_IDENTITY_LENGTH;
		}
	}
	/**
	 * @brief  Gets the total length of TLV.
	 * Total length of TLV is length of type field (UINT16) + length of 'length'
	 * field (UINT16) + length of
	 * identities (each PTP_CLOCK_IDENTITY_LENGTH) in the path
	 * @return Total length
	 */
	int length() {
		return (int)(2*sizeof(uint16_t) + PTP_CLOCK_IDENTITY_LENGTH*identityList.size());
	}