time.c revision 0c27b3fe77ac1d5094ba3521e8142d9e7973133f
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor/*
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor * Copyright (C) 1998-2005, 2007, 2009-2012, 2014, 2016 Internet Systems Consortium, Inc. ("ISC")
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor *
ea08352ef148842f2db8c00add52444487c0f638lgentis * This Source Code Form is subject to the terms of the Mozilla Public
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor * License, v. 2.0. If a copy of the MPL was not distributed with this
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor * file, You can obtain one at http://mozilla.org/MPL/2.0/.
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor */
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor/* $Id$ */
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor/*! \file */
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor#include <config.h>
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor#include <stdio.h>
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor#include <isc/string.h> /* Required for HP/UX (and others?) */
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor#include <time.h>
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor#include <ctype.h>
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor#include <isc/print.h>
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor#include <isc/region.h>
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor#include <isc/serial.h>
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor#include <isc/stdtime.h>
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor#include <isc/util.h>
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor#include <dns/result.h>
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor#include <dns/time.h>
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzorstatic const int days[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzorisc_result_t
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzordns_time64_totext(isc_int64_t t, isc_buffer_t *target) {
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor struct tm tm;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor char buf[sizeof("YYYYMMDDHHMMSS")];
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor int secs;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor unsigned int l;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor isc_region_t region;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor/*
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor * Warning. Do NOT use arguments with side effects with these macros.
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor */
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor#define is_leap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0)
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor#define year_secs(y) ((is_leap(y) ? 366 : 365 ) * 86400)
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor#define month_secs(m,y) ((days[m] + ((m == 1 && is_leap(y)) ? 1 : 0 )) * 86400)
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor tm.tm_year = 70;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor while (t < 0) {
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor if (tm.tm_year == 0)
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor return (ISC_R_RANGE);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor tm.tm_year--;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor secs = year_secs(tm.tm_year + 1900);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor t += secs;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor }
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor while ((secs = year_secs(tm.tm_year + 1900)) <= t) {
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor t -= secs;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor tm.tm_year++;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor if (tm.tm_year + 1900 > 9999)
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor return (ISC_R_RANGE);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor }
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor tm.tm_mon = 0;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor while ((secs = month_secs(tm.tm_mon, tm.tm_year + 1900)) <= t) {
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor t -= secs;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor tm.tm_mon++;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor }
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor tm.tm_mday = 1;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor while (86400 <= t) {
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor t -= 86400;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor tm.tm_mday++;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor }
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor tm.tm_hour = 0;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor while (3600 <= t) {
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor t -= 3600;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor tm.tm_hour++;
67972b58b9a56ebc101bea2e9758569b973dd5cand }
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor tm.tm_min = 0;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor while (60 <= t) {
ea08352ef148842f2db8c00add52444487c0f638lgentis t -= 60;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor tm.tm_min++;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor }
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor tm.tm_sec = (int)t;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor /* yyyy mm dd HH MM SS */
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor snprintf(buf, sizeof(buf), "%04d%02d%02d%02d%02d%02d",
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor tm.tm_hour, tm.tm_min, tm.tm_sec);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor isc_buffer_availableregion(target, &region);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor l = strlen(buf);
67972b58b9a56ebc101bea2e9758569b973dd5cand
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor if (l > region.length)
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor return (ISC_R_NOSPACE);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor memmove(region.base, buf, l);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor isc_buffer_add(target, l);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor return (ISC_R_SUCCESS);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor}
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzorisc_int64_t
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzordns_time64_from32(isc_uint32_t value) {
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor isc_stdtime_t now;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor isc_int64_t start;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor isc_int64_t t;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor /*
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor * Adjust the time to the closest epoch. This should be changed
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor * to use a 64-bit counterpart to isc_stdtime_get() if one ever
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor * is defined, but even the current code is good until the year
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor * 2106.
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor */
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor isc_stdtime_get(&now);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor start = (isc_int64_t) now;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor if (isc_serial_gt(value, now))
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor t = start + (value - now);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor else
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor t = start - (now - value);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor return (t);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor}
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzorisc_result_t
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzordns_time32_totext(isc_uint32_t value, isc_buffer_t *target) {
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor return (dns_time64_totext(dns_time64_from32(value), target));
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor}
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzorisc_result_t
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzordns_time64_fromtext(const char *source, isc_int64_t *target) {
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor int year, month, day, hour, minute, second;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor isc_int64_t value;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor int secs;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor int i;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor#define RANGE(min, max, value) \
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor do { \
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor if (value < (min) || value > (max)) \
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor return (ISC_R_RANGE); \
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor } while (0)
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor if (strlen(source) != 14U)
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor return (DNS_R_SYNTAX);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor /*
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor * Confirm the source only consists digits. sscanf() allows some
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor * minor exceptions.
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor */
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor for (i = 0; i < 14; i++) {
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor if (!isdigit((unsigned char)source[i]))
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor return (DNS_R_SYNTAX);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor }
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor if (sscanf(source, "%4d%2d%2d%2d%2d%2d",
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor &year, &month, &day, &hour, &minute, &second) != 6)
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor return (DNS_R_SYNTAX);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor RANGE(0, 9999, year);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor RANGE(1, 12, month);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor RANGE(1, days[month - 1] +
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor ((month == 2 && is_leap(year)) ? 1 : 0), day);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor#ifdef __COVERITY__
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor /*
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor * Use a simplified range to silence Coverity warning (in
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor * arithmetic with day below).
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor */
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor RANGE(1, 31, day);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor#endif /* __COVERITY__ */
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor RANGE(0, 23, hour);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor RANGE(0, 59, minute);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor RANGE(0, 60, second); /* 60 == leap second. */
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor /*
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor * Calculate seconds from epoch.
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor * Note: this uses a idealized calendar.
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor */
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor value = second + (60 * minute) + (3600 * hour) + ((day - 1) * 86400);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor for (i = 0; i < (month - 1); i++)
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor value += days[i] * 86400;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor if (is_leap(year) && month > 2)
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor value += 86400;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor if (year < 1970) {
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor for (i = 1969; i >= year; i--) {
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor secs = (is_leap(i) ? 366 : 365) * 86400;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor value -= secs;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor }
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor } else {
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor for (i = 1970; i < year; i++) {
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor secs = (is_leap(i) ? 366 : 365) * 86400;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor value += secs;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor }
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor }
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor *target = value;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor return (ISC_R_SUCCESS);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor}
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzorisc_result_t
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzordns_time32_fromtext(const char *source, isc_uint32_t *target) {
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor isc_int64_t value64;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor isc_result_t result;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor result = dns_time64_fromtext(source, &value64);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor if (result != ISC_R_SUCCESS)
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor return (result);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor *target = (isc_uint32_t)value64;
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor return (ISC_R_SUCCESS);
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor}
ceb80b53389aae381f54a02e75cca69077c4fb2fgryzor