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Kernel/include/net/ntp.hpp
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Kernel/include/net/ntp.hpp
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/*
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This file is part of Fennix Kernel.
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Fennix Kernel is free software: you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation, either version 3 of
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the License, or (at your option) any later version.
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Fennix Kernel is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef __FENNIX_KERNEL_NTP_H__
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#define __FENNIX_KERNEL_NTP_H__
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#include <net/udp.hpp>
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#include <types.h>
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namespace NetworkNTP
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{
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struct NTPHeader
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{
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/** @brief Leap indicator
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* 00 - no warning
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* 01 - last minute has 61 seconds
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* 10 - last minute has 59 seconds
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* 11 - alarm condition (clock not synchronized)
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*/
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uint8_t LeapIndicator : 2;
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/** @brief Version number of the protocol
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* 3 - IPv4 only
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* 4 - IPv4, IPv6 and OSI
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* 5 - IPv4, IPv6 and OSI
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* 6 - IPv4, IPv6 and OSI
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* 7 - IPv4, IPv6 and OSI
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*/
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uint8_t VersionNumber : 3;
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/** @brief Mode
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* 0 - reserved
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* 1 - symmetric active
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* 2 - symmetric passive
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* 3 - client
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* 4 - server
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* 5 - broadcast
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* 6 - reserved for NTP control message
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* 7 - reserved for private use
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*/
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uint8_t Mode : 3;
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/** @brief Stratum
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* 0 - unspecified or unavailable
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* 1 - primary reference (e.g. radio clock)
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* 2-15 - secondary reference (via NTP or SNTP)
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* 16 - unsynchronized
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* 17-255 - reserved
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*/
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uint8_t Stratum;
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/** @brief Polling interval
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* 4 - 16 seconds
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* 5 - 32 seconds
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* 6 - 64 seconds
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* 7 - 128 seconds
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* 8 - 256 seconds
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* 9 - 512 seconds
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* 10 - 1024 seconds
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* 11 - 2048 seconds
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* 12 - 4096 seconds
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* 13 - 8192 seconds
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* 14 - 16384 seconds
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* 15 - 32768 seconds
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*/
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uint8_t Poll;
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/** @brief Precision
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* -6 - 0.015625 seconds
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* -5 - 0.03125 seconds
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* -4 - 0.0625 seconds
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* -3 - 0.125 seconds
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* -2 - 0.25 seconds
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* -1 - 0.5 seconds
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* 0 - 1 second
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* 1 - 2 seconds
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* 2 - 4 seconds
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* 3 - 8 seconds
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* 4 - 16 seconds
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* 5 - 32 seconds
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* 6 - 64 seconds
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* 7 - 128 seconds
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*/
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uint8_t Precision;
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/** @brief Root delay
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* Total round trip delay to the primary reference source
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*/
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uint32_t RootDelay;
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/** @brief Root dispersion
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* Nominal error relative to the primary reference source
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*/
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uint32_t RootDispersion;
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/** @brief Reference identifier
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* 0x00000000 - unspecified
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* 0x00000001 - radio clock
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* 0x00000002 - atomic clock
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* 0x00000003 - GPS receiver
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* 0x00000004 - local oscillator
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* 0x00000005 - LORAN-C receiver
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* 0x00000006 - microprocessor
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* 0x00000007 - internet
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* 0x00000008 - FLL
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* 0x00000009 - other
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* 0x0000000A - WWV
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* 0x0000000B - WWVB
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* 0x0000000C - WWVH
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* 0x0000000D - NIST dialup
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* 0x0000000E - telephone
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* 0x0000000F - reserved
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*/
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uint32_t ReferenceIdentifier;
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/** @brief Reference timestamp
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* The time at which the clock was last set or corrected
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*/
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uint32_t ReferenceTimestamp[2];
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/** @brief Originate timestamp
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* The time at which the request departed the client for the server
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*/
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uint32_t OriginateTimestamp[2];
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/** @brief Receive timestamp
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* The time at which the request arrived at the server
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*/
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uint32_t ReceiveTimestamp[2];
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/** @brief Transmit timestamp
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* The time at which the reply departed the server for the client
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*/
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uint32_t TransmitTimestamp[2];
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/** @brief Message authentication code
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* Key identifier
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* @note Only when the NTP authentication scheme is used
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*/
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// uint32_t MessageAuthenticationCode;
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} __packed;
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class NTP : public NetworkUDP::UDPEvents
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{
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private:
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NetworkUDP::Socket *UDPSocket;
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bool TimeReceived = false;
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NTPHeader NTPPacket;
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virtual void OnUDPPacketReceived(NetworkUDP::Socket *Socket, uint8_t *Data, size_t Length);
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public:
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NTP(NetworkUDP::Socket *Socket);
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~NTP();
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/**
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* @brief Get the time from the NTP server
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*
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* @return Unix Timestamp
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*/
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int ReadTime();
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};
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}
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#endif // !__FENNIX_KERNEL_NTP_H__
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