/* $NetBSD: duration.c,v 1.2.4.2 2024/02/29 12:35:26 martin Exp $ */ /* * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * 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); }