80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
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/* dtls -- a very basic DTLS implementation
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*
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* Copyright (C) 2011--2013 Olaf Bergmann <bergmann@tzi.org>
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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/**
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* @file dtls_time.c
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* @brief Clock Handling
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*/
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#include "tinydtls.h"
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#include "dtls_config.h"
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#include "dtls_time.h"
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#ifdef WITH_CONTIKI
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clock_time_t dtls_clock_offset;
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void
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dtls_clock_init(void) {
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dtls_clock_offset = clock_time();
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}
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void
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dtls_ticks(dtls_tick_t *t) {
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*t = clock_time();
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}
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#else /* WITH_CONTIKI */
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time_t dtls_clock_offset;
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void
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dtls_clock_init(void) {
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#ifdef HAVE_TIME_H
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dtls_clock_offset = time(NULL);
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#else
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# ifdef __GNUC__
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/* Issue a warning when using gcc. Other prepropressors do
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* not seem to have a similar feature. */
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# warning "cannot initialize clock"
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# endif
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dtls_clock_offset = 0;
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#endif
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}
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void dtls_ticks(dtls_tick_t *t) {
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#ifdef HAVE_SYS_TIME_H
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struct timeval tv;
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gettimeofday(&tv, NULL);
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*t = (tv.tv_sec - dtls_clock_offset) * DTLS_TICKS_PER_SECOND
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+ (tv.tv_usec * DTLS_TICKS_PER_SECOND / 1000000);
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#else
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#error "clock not implemented"
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#endif
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}
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#endif /* WITH_CONTIKI */
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