46 lines
1.9 KiB
C
46 lines
1.9 KiB
C
/*
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* This file is part of the nqptp distribution (https://github.com/mikebrady/nqptp).
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* Copyright (c) 2021 Mike Brady.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* Commercial licensing is also available.
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*/
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#ifndef NQPTP_SHM_STRUCTURES_H
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#define NQPTP_SHM_STRUCTURES_H
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#define NQPTP_SHM_STRUCTURES_VERSION 7
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#define NQPTP_CONTROL_PORT 9000
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// The control port will accept a UDP packet with the first letter being:
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// "T", followed by the name of the shared memory interface, followed by
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// a space and then a space-delimited list of ip numbers, either IPv4 or IPv6
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// the whole not to exceed 4096 characters in total
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// The IPs will become the new list of timing peers, replacing any previous
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#include <inttypes.h>
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#include <pthread.h>
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struct shm_structure {
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pthread_mutex_t shm_mutex; // for safely accessing the structure
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uint16_t version; // check this is equal to NQPTP_SHM_STRUCTURES_VERSION
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uint64_t master_clock_id; // the current master clock
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char master_clock_ip[64]; // where it's coming from
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uint64_t local_time; // the time when the offset was calculated
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uint64_t local_to_master_time_offset; // add this to the local time to get master clock time
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uint64_t master_clock_start_time; // this is when the master clock became master
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};
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#endif
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