e2168abe9a
Fixed bug where negative offsets were not properly handled because clock_timespec_subtract clamps values to zero. Implement support for SO_TIMESTAMP to get accurate packet reception timestamp. Implemented delay requests for measuring packet transfer delay. Implemented clock drift estimation to bring the clocks closer to sync and to filter out measurement jitter.
136 lines
3.5 KiB
C
136 lines
3.5 KiB
C
/****************************************************************************
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* apps/netutils/ptpd/ptpv2.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __APPS_NETUTILS_PTPD_PTPV2_H
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#define __APPS_NETUTILS_PTPD_PTPV2_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <stdint.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Time-critical messages (id < 8) are sent to port 319,
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* other messages to port 320.
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*/
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#define PTP_UDP_PORT_EVENT 319
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#define PTP_UDP_PORT_INFO 320
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/* Multicast address to send to: 224.0.1.129 */
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#define PTP_MULTICAST_ADDR ((in_addr_t)0xE0000181)
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/* Message types */
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#define PTP_MSGTYPE_MASK 0x0F
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#define PTP_MSGTYPE_SYNC 0
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#define PTP_MSGTYPE_DELAY_REQ 1
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#define PTP_MSGTYPE_FOLLOW_UP 8
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#define PTP_MSGTYPE_DELAY_RESP 9
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#define PTP_MSGTYPE_ANNOUNCE 11
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/* Message flags */
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#define PTP_FLAGS0_TWOSTEP (1 << 1)
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/* Defined in IEEE 1588-2008 Precision Time Protocol
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* All multi-byte fields are big-endian.
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*/
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/* Common header for all message types */
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struct ptp_header_s
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{
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uint8_t messagetype;
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uint8_t version;
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uint8_t messagelength[2];
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uint8_t domain;
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uint8_t reserved1;
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uint8_t flags[2];
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uint8_t correction[8];
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uint8_t reserved2[4];
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uint8_t sourceidentity[8];
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uint8_t sourceportindex[2];
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uint8_t sequenceid[2];
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uint8_t controlfield;
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uint8_t logmessageinterval;
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};
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/* Announce a master clock */
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struct ptp_announce_s
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{
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struct ptp_header_s header;
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uint8_t origintimestamp[10];
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uint8_t utcoffset[2];
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uint8_t reserved;
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uint8_t gm_priority1;
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uint8_t gm_quality[4];
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uint8_t gm_priority2;
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uint8_t gm_identity[8];
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uint8_t stepsremoved[2];
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uint8_t timesource;
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};
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/* Sync: transmit timestamp from master clock */
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struct ptp_sync_s
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{
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struct ptp_header_s header;
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uint8_t origintimestamp[10];
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};
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/* FollowUp: actual timestamp of when sync message was sent */
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struct ptp_follow_up_s
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{
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struct ptp_header_s header;
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uint8_t origintimestamp[10];
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};
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/* DelayReq: request delay measurement */
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struct ptp_delay_req_s
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{
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struct ptp_header_s header;
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uint8_t origintimestamp[10];
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};
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/* DelayResp: response to DelayReq */
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struct ptp_delay_resp_s
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{
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struct ptp_header_s header;
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uint8_t receivetimestamp[10];
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uint8_t reqidentity[8];
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uint8_t reqportindex[2];
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};
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#endif /* __APPS_NETUTILS_PTPD_PTPV2_H */
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