diff options
Diffstat (limited to 'lib/isccfg/duration.c')
| -rw-r--r-- | lib/isccfg/duration.c | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/lib/isccfg/duration.c b/lib/isccfg/duration.c new file mode 100644 index 0000000..9ed9d6f --- /dev/null +++ b/lib/isccfg/duration.c @@ -0,0 +1,239 @@ +/* + * 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); +} |