mirror of
https://github.com/irungentoo/toxcore.git
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136 lines
3.3 KiB
C
136 lines
3.3 KiB
C
/*
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* util.c -- Utilities.
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*
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* This file is donated to the Tox Project.
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* Copyright 2013 plutooo
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*
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* Copyright (C) 2013 Tox project All Rights Reserved.
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*
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* This file is part of Tox.
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*
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* Tox 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, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Tox 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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*
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* You should have received a copy of the GNU General Public License
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* along with Tox. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <time.h>
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/* for CLIENT_ID_SIZE */
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#include "DHT.h"
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#include "util.h"
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/* don't call into system billions of times for no reason */
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static uint64_t unix_time_value;
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static uint64_t unix_base_time_value;
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void unix_time_update()
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{
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if (unix_base_time_value == 0)
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unix_base_time_value = ((uint64_t)time(NULL) - (current_time_monotonic() / 1000ULL));
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unix_time_value = (current_time_monotonic() / 1000ULL) + unix_base_time_value;
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}
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uint64_t unix_time()
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{
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return unix_time_value;
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}
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int is_timeout(uint64_t timestamp, uint64_t timeout)
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{
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return timestamp + timeout <= unix_time();
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}
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/* id functions */
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bool id_equal(const uint8_t *dest, const uint8_t *src)
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{
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return memcmp(dest, src, CLIENT_ID_SIZE) == 0;
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}
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uint32_t id_copy(uint8_t *dest, const uint8_t *src)
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{
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memcpy(dest, src, CLIENT_ID_SIZE);
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return CLIENT_ID_SIZE;
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}
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void host_to_net(uint8_t *num, uint16_t numbytes)
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{
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#ifndef WORDS_BIGENDIAN
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uint32_t i;
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uint8_t buff[numbytes];
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for (i = 0; i < numbytes; ++i) {
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buff[i] = num[numbytes - i - 1];
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}
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memcpy(num, buff, numbytes);
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#endif
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return;
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}
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/* state load/save */
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int load_state(load_state_callback_func load_state_callback, void *outer,
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const uint8_t *data, uint32_t length, uint16_t cookie_inner)
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{
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if (!load_state_callback || !data) {
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#ifdef DEBUG
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fprintf(stderr, "load_state() called with invalid args.\n");
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#endif
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return -1;
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}
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uint16_t type;
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uint32_t length_sub, cookie_type;
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uint32_t size_head = sizeof(uint32_t) * 2;
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while (length >= size_head) {
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memcpy(&length_sub, data, sizeof(length_sub));
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memcpy(&cookie_type, data + sizeof(length_sub), sizeof(cookie_type));
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data += size_head;
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length -= size_head;
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if (length < length_sub) {
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/* file truncated */
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#ifdef DEBUG
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fprintf(stderr, "state file too short: %u < %u\n", length, length_sub);
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#endif
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return -1;
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}
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if ((cookie_type >> 16) != cookie_inner) {
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/* something is not matching up in a bad way, give up */
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#ifdef DEBUG
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fprintf(stderr, "state file garbeled: %04hx != %04hx\n", (cookie_type >> 16), cookie_inner);
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#endif
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return -1;
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}
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type = cookie_type & 0xFFFF;
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if (-1 == load_state_callback(outer, data, length_sub, type))
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return -1;
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data += length_sub;
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length -= length_sub;
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}
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return length == 0 ? 0 : -1;
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};
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