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