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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* SPDX-License-Identifier: MPL-2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/*! \file */
#include <ctype.h>
#include <errno.h>
#include <inttypes.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <isc/buffer.h>
#include <isc/parseint.h>
#include <isc/print.h>
#include <isc/region.h>
#include <isc/result.h>
#include <isc/string.h>
#include <isc/util.h>
#include <dns/ttl.h>
#include <isccfg/duration.h>
/*
* isccfg_duration_fromtext initially taken from OpenDNSSEC code base.
* Modified to fit the BIND 9 code.
*/
isc_result_t
isccfg_duration_fromtext(isc_textregion_t *source,
isccfg_duration_t *duration) {
char buf[CFG_DURATION_MAXLEN] = { 0 };
char *P, *X, *T, *W, *str;
bool not_weeks = false;
int i;
long long int lli;
/*
* Copy the buffer as it may not be NULL terminated.
*/
if (source->length > sizeof(buf) - 1) {
return (ISC_R_BADNUMBER);
}
/* Copy source->length bytes and NULL terminate. */
snprintf(buf, sizeof(buf), "%.*s", (int)source->length, source->base);
str = buf;
/* Clear out duration. */
for (i = 0; i < 7; i++) {
duration->parts[i] = 0;
}
duration->iso8601 = false;
duration->unlimited = false;
/* Every duration starts with 'P' */
if (toupper((unsigned char)str[0]) != 'P') {
return (ISC_R_BADNUMBER);
}
P = str;
/* Record the time indicator. */
T = strpbrk(str, "Tt");
/* Record years. */
X = strpbrk(str, "Yy");
if (X != NULL) {
errno = 0;
lli = strtoll(str + 1, NULL, 10);
if (errno != 0 || lli < 0 || lli > UINT32_MAX) {
return (ISC_R_BADNUMBER);
}
duration->parts[0] = (uint32_t)lli;
str = X;
not_weeks = true;
}
/* Record months. */
X = strpbrk(str, "Mm");
/*
* M could be months or minutes. This is months if there is no time
* part, or this M indicator is before the time indicator.
*/
if (X != NULL && (T == NULL || (size_t)(X - P) < (size_t)(T - P))) {
errno = 0;
lli = strtoll(str + 1, NULL, 10);
if (errno != 0 || lli < 0 || lli > UINT32_MAX) {
return (ISC_R_BADNUMBER);
}
duration->parts[1] = (uint32_t)lli;
str = X;
not_weeks = true;
}
/* Record days. */
X = strpbrk(str, "Dd");
if (X != NULL) {
errno = 0;
lli = strtoll(str + 1, NULL, 10);
if (errno != 0 || lli < 0 || lli > UINT32_MAX) {
return (ISC_R_BADNUMBER);
}
duration->parts[3] = (uint32_t)lli;
str = X;
not_weeks = true;
}
/* Time part? */
if (T != NULL) {
str = T;
not_weeks = true;
}
/* Record hours. */
X = strpbrk(str, "Hh");
if (X != NULL && T != NULL) {
errno = 0;
lli = strtoll(str + 1, NULL, 10);
if (errno != 0 || lli < 0 || lli > UINT32_MAX) {
return (ISC_R_BADNUMBER);
}
duration->parts[4] = (uint32_t)lli;
str = X;
not_weeks = true;
}
/* Record minutes. */
X = strpbrk(str, "Mm");
/*
* M could be months or minutes. This is minutes if there is a time
* part and the M indicator is behind the time indicator.
*/
if (X != NULL && T != NULL && (size_t)(X - P) > (size_t)(T - P)) {
errno = 0;
lli = strtoll(str + 1, NULL, 10);
if (errno != 0 || lli < 0 || lli > UINT32_MAX) {
return (ISC_R_BADNUMBER);
}
duration->parts[5] = (uint32_t)lli;
str = X;
not_weeks = true;
}
/* Record seconds. */
X = strpbrk(str, "Ss");
if (X != NULL && T != NULL) {
errno = 0;
lli = strtoll(str + 1, NULL, 10);
if (errno != 0 || lli < 0 || lli > UINT32_MAX) {
return (ISC_R_BADNUMBER);
}
duration->parts[6] = (uint32_t)lli;
str = X;
not_weeks = true;
}
/* Or is the duration configured in weeks? */
W = strpbrk(buf, "Ww");
if (W != NULL) {
if (not_weeks) {
/* Mix of weeks and other indicators is not allowed */
return (ISC_R_BADNUMBER);
} else {
errno = 0;
lli = strtoll(str + 1, NULL, 10);
if (errno != 0 || lli < 0 || lli > UINT32_MAX) {
return (ISC_R_BADNUMBER);
}
duration->parts[2] = (uint32_t)lli;
str = W;
}
}
/* Deal with trailing garbage. */
if (str[1] != '\0') {
return (ISC_R_BADNUMBER);
}
duration->iso8601 = true;
return (ISC_R_SUCCESS);
}
isc_result_t
isccfg_parse_duration(isc_textregion_t *source, isccfg_duration_t *duration) {
isc_result_t result;
REQUIRE(duration != NULL);
duration->unlimited = false;
result = isccfg_duration_fromtext(source, duration);
if (result == ISC_R_BADNUMBER) {
/* Fallback to dns_ttl_fromtext. */
uint32_t ttl;
result = dns_ttl_fromtext(source, &ttl);
if (result == ISC_R_SUCCESS) {
/*
* With dns_ttl_fromtext() the information on optional
* units is lost, and is treated as seconds from now on.
*/
duration->iso8601 = false;
duration->parts[6] = ttl;
}
}
return (result);
}
uint32_t
isccfg_duration_toseconds(const isccfg_duration_t *duration) {
uint64_t seconds = 0;
REQUIRE(duration != NULL);
seconds += (uint64_t)duration->parts[6]; /* Seconds */
seconds += (uint64_t)duration->parts[5] * 60; /* Minutes */
seconds += (uint64_t)duration->parts[4] * 3600; /* Hours */
seconds += (uint64_t)duration->parts[3] * 86400; /* Days */
seconds += (uint64_t)duration->parts[2] * 86400 * 7; /* Weeks */
/*
* The below additions are not entirely correct
* because days may vary per month and per year.
*/
seconds += (uint64_t)duration->parts[1] * 86400 * 31; /* Months */
seconds += (uint64_t)duration->parts[0] * 86400 * 365; /* Years */
return (seconds > UINT32_MAX ? UINT32_MAX : (uint32_t)seconds);
}
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