[04ca20e] | 1 | /* |
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[a7cce8d] | 2 | * Copyright (C) 2020-2021 Soleta Networks <info@soleta.eu> |
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[04ca20e] | 3 | * |
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| 4 | * This program is free software: you can redistribute it and/or modify it under |
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| 5 | * the terms of the GNU Affero General Public License as published by the |
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[a7cce8d] | 6 | * Free Software Foundation; either version 3 of the License, or |
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| 7 | * (at your option) any later version. |
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[04ca20e] | 8 | */ |
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| 9 | |
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[83b242c] | 10 | #include "schedule.h" |
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| 11 | #include "list.h" |
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| 12 | #include <sys/types.h> |
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| 13 | #include <stdbool.h> |
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| 14 | #include <stdint.h> |
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| 15 | #include <stdlib.h> |
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| 16 | #include <syslog.h> |
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| 17 | #include <time.h> |
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| 18 | #include <ev.h> |
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| 19 | |
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| 20 | struct og_schedule *current_schedule = NULL; |
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| 21 | static LIST_HEAD(schedule_list); |
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| 22 | |
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| 23 | static void og_schedule_add(struct og_schedule *new) |
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| 24 | { |
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| 25 | struct og_schedule *schedule, *next; |
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| 26 | |
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| 27 | list_for_each_entry_safe(schedule, next, &schedule_list, list) { |
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| 28 | if (new->seconds < schedule->seconds) { |
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| 29 | list_add_tail(&new->list, &schedule->list); |
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| 30 | return; |
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| 31 | } |
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| 32 | } |
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| 33 | list_add_tail(&new->list, &schedule_list); |
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| 34 | } |
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| 35 | |
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| 36 | /* Returns the days in a month from the weekday. */ |
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| 37 | static void get_days_from_weekday(struct tm *tm, int wday, int *days, int *j) |
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| 38 | { |
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| 39 | int i, mday = 0; |
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| 40 | |
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| 41 | tm->tm_mday = 1; |
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| 42 | |
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| 43 | //Shift week to start on Sunday instead of Monday |
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| 44 | if (wday == 6) |
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| 45 | wday = 0; |
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| 46 | else |
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| 47 | wday++; |
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| 48 | |
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| 49 | /* A bit bruteforce, but simple. */ |
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| 50 | for (i = 0; i <= 30; i++) { |
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| 51 | mktime(tm); |
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| 52 | /* Not this weekday, skip. */ |
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| 53 | if (tm->tm_wday != wday) { |
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| 54 | tm->tm_mday++; |
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| 55 | continue; |
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| 56 | } |
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| 57 | /* Not interested in next month. */ |
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| 58 | if (tm->tm_mday < mday) |
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| 59 | break; |
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| 60 | |
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| 61 | /* Found a matching. */ |
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| 62 | mday = tm->tm_mday; |
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| 63 | days[(*j)++] = tm->tm_mday; |
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| 64 | tm->tm_mday++; |
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| 65 | } |
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| 66 | } |
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| 67 | |
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| 68 | /* Returns the days in the given week. */ |
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| 69 | static void get_days_from_week(struct tm *tm, int week, int *days, int *k) |
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| 70 | { |
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| 71 | int i, j, week_counter = 0; |
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| 72 | bool week_over = false; |
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| 73 | |
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| 74 | tm->tm_mday = 1; |
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| 75 | |
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| 76 | /* Remaining days of this month. */ |
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| 77 | for (i = 0; i <= 30; i++) { |
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| 78 | mktime(tm); |
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| 79 | |
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| 80 | /* Last day of this week? */ |
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| 81 | if (tm->tm_wday == 6) |
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| 82 | week_over = true; |
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| 83 | |
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| 84 | /* Not the week we are searching for. */ |
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| 85 | if (week != week_counter) { |
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| 86 | tm->tm_mday++; |
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| 87 | if (week_over) { |
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| 88 | week_counter++; |
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| 89 | week_over = false; |
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| 90 | } |
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| 91 | continue; |
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| 92 | } |
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| 93 | |
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| 94 | /* Found matching. */ |
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| 95 | for (j = tm->tm_wday; j <= 6; j++) { |
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| 96 | days[(*k)++] = tm->tm_mday++; |
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| 97 | mktime(tm); |
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| 98 | } |
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| 99 | break; |
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| 100 | } |
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| 101 | } |
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| 102 | |
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| 103 | static int monthdays[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; |
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| 104 | |
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| 105 | static int last_month_day(struct tm *tm) |
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| 106 | { |
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| 107 | /* Leap year? Adjust it. */ |
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| 108 | if (tm->tm_mon == 1) { |
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| 109 | tm->tm_mday = 29; |
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| 110 | mktime(tm); |
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| 111 | if (tm->tm_mday == 29) |
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| 112 | return 29; |
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| 113 | |
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| 114 | tm->tm_mon = 1; |
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| 115 | } |
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| 116 | |
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| 117 | return monthdays[tm->tm_mon]; |
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| 118 | } |
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| 119 | |
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| 120 | /* Returns the days in the given week. */ |
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| 121 | static void get_last_week(struct tm *tm, int *days, int *j) |
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| 122 | { |
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| 123 | int i, last_day; |
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| 124 | |
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| 125 | last_day = last_month_day(tm); |
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| 126 | tm->tm_mday = last_day; |
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| 127 | |
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| 128 | for (i = last_day; i >= last_day - 6; i--) { |
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| 129 | mktime(tm); |
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| 130 | |
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| 131 | days[(*j)++] = tm->tm_mday; |
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| 132 | |
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| 133 | |
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| 134 | /* Last day of this week? */ |
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[130b6ff] | 135 | if (tm->tm_wday == 1) |
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[83b242c] | 136 | break; |
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| 137 | |
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| 138 | tm->tm_mday--; |
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| 139 | } |
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| 140 | } |
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| 141 | |
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| 142 | static void og_parse_years(uint16_t years_mask, int years[]) |
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| 143 | { |
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| 144 | int i, j = 0; |
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| 145 | |
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| 146 | for (i = 0; i < 16; i++) { |
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| 147 | if ((1 << i) & years_mask) |
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| 148 | years[j++] = 2010 + i - 1900; |
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| 149 | } |
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| 150 | } |
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| 151 | |
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| 152 | static void og_parse_months(uint16_t months_mask, int months[]) |
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| 153 | { |
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| 154 | int i, j = 0; |
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| 155 | |
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| 156 | for (i = 0; i < 12; i++) { |
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| 157 | if ((1 << i) & months_mask) |
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| 158 | months[j++] = i + 1; |
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| 159 | } |
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| 160 | } |
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| 161 | |
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| 162 | static void og_parse_days(uint32_t days_mask, int *days) |
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| 163 | { |
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| 164 | int i, j = 0; |
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| 165 | |
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| 166 | for (i = 0; i < 31; i++) { |
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| 167 | if ((1 << i) & days_mask) |
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| 168 | days[j++] = i + 1; |
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| 169 | } |
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| 170 | } |
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| 171 | |
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| 172 | static void og_parse_hours(uint16_t hours_mask, uint8_t am_pm, int hours[]) |
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| 173 | { |
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| 174 | int pm = 12 * am_pm; |
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| 175 | int i, j = 0; |
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| 176 | |
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| 177 | for (i = 0; i < 12; i++) { |
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| 178 | if ((1 << i) & hours_mask) |
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| 179 | hours[j++] = i + pm + 1; |
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| 180 | } |
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| 181 | } |
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| 182 | |
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| 183 | static void og_schedule_remove_duplicates() |
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| 184 | { |
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| 185 | struct og_schedule *schedule, *next, *prev = NULL; |
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| 186 | |
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| 187 | list_for_each_entry_safe(schedule, next, &schedule_list, list) { |
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| 188 | if (!prev) { |
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| 189 | prev = schedule; |
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| 190 | continue; |
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| 191 | } |
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| 192 | if (prev->seconds == schedule->seconds && |
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| 193 | prev->task_id == schedule->task_id) { |
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| 194 | list_del(&prev->list); |
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| 195 | free(prev); |
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| 196 | } |
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| 197 | prev = schedule; |
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| 198 | } |
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| 199 | } |
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| 200 | |
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[6c7d827] | 201 | static bool og_schedule_stale(time_t seconds) |
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| 202 | { |
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| 203 | time_t now; |
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| 204 | |
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| 205 | now = time(NULL); |
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| 206 | if (seconds < now) |
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| 207 | return true; |
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| 208 | |
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| 209 | return false; |
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| 210 | } |
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| 211 | |
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[130b6ff] | 212 | static void og_schedule_create_weekdays(int month, int year, |
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| 213 | int *hours, int minutes, int week_days, |
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[63c4ea5] | 214 | uint32_t task_id, uint32_t schedule_id, |
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[6c7d827] | 215 | enum og_schedule_type type, |
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[e68fefe] | 216 | bool check_stale) |
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[130b6ff] | 217 | { |
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| 218 | struct og_schedule *schedule; |
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| 219 | int month_days[5]; |
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| 220 | int n_month_days; |
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[6c7d827] | 221 | time_t seconds; |
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[130b6ff] | 222 | uint32_t wday; |
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| 223 | struct tm tm; |
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| 224 | int k, l; |
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| 225 | |
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| 226 | for (wday = 0; wday < 7; wday++) { |
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| 227 | if (!((1 << wday) & week_days)) |
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| 228 | continue; |
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| 229 | |
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| 230 | memset(&tm, 0, sizeof(tm)); |
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| 231 | tm.tm_mon = month; |
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| 232 | tm.tm_year = year; |
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| 233 | |
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| 234 | n_month_days = 0; |
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| 235 | memset(month_days, 0, sizeof(month_days)); |
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| 236 | get_days_from_weekday(&tm, wday, month_days, &n_month_days); |
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| 237 | |
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| 238 | for (k = 0; month_days[k] != 0 && k < n_month_days; k++) { |
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| 239 | for (l = 0; hours[l] != 0 && l < 31; l++) { |
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| 240 | memset(&tm, 0, sizeof(tm)); |
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| 241 | tm.tm_year = year; |
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| 242 | tm.tm_mon = month; |
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| 243 | tm.tm_mday = month_days[k]; |
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| 244 | tm.tm_hour = hours[l] - 1; |
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| 245 | tm.tm_min = minutes; |
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[42c2253] | 246 | tm.tm_isdst = -1; |
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[6c7d827] | 247 | seconds = mktime(&tm); |
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| 248 | |
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[e68fefe] | 249 | if (check_stale && og_schedule_stale(seconds)) |
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[6c7d827] | 250 | continue; |
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| 251 | |
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| 252 | schedule = (struct og_schedule *) |
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| 253 | calloc(1, sizeof(struct og_schedule)); |
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| 254 | if (!schedule) |
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| 255 | return; |
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[130b6ff] | 256 | |
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[6c7d827] | 257 | schedule->seconds = seconds; |
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[130b6ff] | 258 | schedule->task_id = task_id; |
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| 259 | schedule->schedule_id = schedule_id; |
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[63c4ea5] | 260 | schedule->type = type; |
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[130b6ff] | 261 | og_schedule_add(schedule); |
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| 262 | } |
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| 263 | } |
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| 264 | } |
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| 265 | } |
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| 266 | |
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| 267 | static void og_schedule_create_weeks(int month, int year, |
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| 268 | int *hours, int minutes, int weeks, |
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[63c4ea5] | 269 | uint32_t task_id, uint32_t schedule_id, |
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[e68fefe] | 270 | enum og_schedule_type type, bool check_stale) |
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[130b6ff] | 271 | { |
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| 272 | struct og_schedule *schedule; |
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| 273 | int month_days[7]; |
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| 274 | int n_month_days; |
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[6c7d827] | 275 | time_t seconds; |
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[130b6ff] | 276 | struct tm tm; |
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| 277 | int week; |
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| 278 | int k, l; |
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| 279 | |
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| 280 | for (week = 0; week < 5; week++) { |
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| 281 | if (!((1 << week) & weeks)) |
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| 282 | continue; |
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| 283 | |
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| 284 | memset(&tm, 0, sizeof(tm)); |
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| 285 | tm.tm_mon = month; |
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| 286 | tm.tm_year = year; |
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| 287 | |
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| 288 | n_month_days = 0; |
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| 289 | memset(month_days, 0, sizeof(month_days)); |
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| 290 | if (week == 5) |
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| 291 | get_last_week(&tm, month_days, &n_month_days); |
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| 292 | else |
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| 293 | get_days_from_week(&tm, week, month_days, &n_month_days); |
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| 294 | |
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| 295 | for (k = 0; month_days[k] != 0 && k < n_month_days; k++) { |
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| 296 | for (l = 0; hours[l] != 0 && l < 31; l++) { |
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| 297 | memset(&tm, 0, sizeof(tm)); |
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| 298 | tm.tm_year = year; |
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| 299 | tm.tm_mon = month; |
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| 300 | tm.tm_mday = month_days[k]; |
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| 301 | tm.tm_hour = hours[l] - 1; |
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| 302 | tm.tm_min = minutes; |
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[42c2253] | 303 | tm.tm_isdst = -1; |
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[6c7d827] | 304 | seconds = mktime(&tm); |
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| 305 | |
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[e68fefe] | 306 | if (check_stale && og_schedule_stale(seconds)) |
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[6c7d827] | 307 | continue; |
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| 308 | |
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| 309 | schedule = (struct og_schedule *) |
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| 310 | calloc(1, sizeof(struct og_schedule)); |
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| 311 | if (!schedule) |
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| 312 | return; |
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[130b6ff] | 313 | |
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[6c7d827] | 314 | schedule->seconds = seconds; |
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[130b6ff] | 315 | schedule->task_id = task_id; |
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| 316 | schedule->schedule_id = schedule_id; |
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[63c4ea5] | 317 | schedule->type = type; |
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[130b6ff] | 318 | og_schedule_add(schedule); |
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| 319 | } |
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| 320 | } |
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| 321 | } |
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| 322 | } |
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| 323 | |
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| 324 | static void og_schedule_create_days(int month, int year, |
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| 325 | int *hours, int minutes, int *days, |
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[63c4ea5] | 326 | uint32_t task_id, uint32_t schedule_id, |
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[e68fefe] | 327 | enum og_schedule_type type, bool check_stale) |
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[130b6ff] | 328 | { |
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| 329 | struct og_schedule *schedule; |
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[6c7d827] | 330 | time_t seconds; |
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[130b6ff] | 331 | struct tm tm; |
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| 332 | int k, l; |
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| 333 | |
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| 334 | for (k = 0; days[k] != 0 && k < 31; k++) { |
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| 335 | for (l = 0; hours[l] != 0 && l < 31; l++) { |
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| 336 | |
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| 337 | memset(&tm, 0, sizeof(tm)); |
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| 338 | tm.tm_year = year; |
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| 339 | tm.tm_mon = month; |
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| 340 | tm.tm_mday = days[k]; |
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| 341 | tm.tm_hour = hours[l] - 1; |
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| 342 | tm.tm_min = minutes; |
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[42c2253] | 343 | tm.tm_isdst = -1; |
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[6c7d827] | 344 | seconds = mktime(&tm); |
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| 345 | |
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[e68fefe] | 346 | if (check_stale && og_schedule_stale(seconds)) |
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[6c7d827] | 347 | continue; |
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| 348 | |
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| 349 | schedule = (struct og_schedule *) |
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| 350 | calloc(1, sizeof(struct og_schedule)); |
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| 351 | if (!schedule) |
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| 352 | return; |
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[130b6ff] | 353 | |
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[6c7d827] | 354 | schedule->seconds = seconds; |
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[130b6ff] | 355 | schedule->task_id = task_id; |
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| 356 | schedule->schedule_id = schedule_id; |
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[63c4ea5] | 357 | schedule->type = type; |
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[130b6ff] | 358 | og_schedule_add(schedule); |
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| 359 | } |
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| 360 | } |
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| 361 | } |
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| 362 | |
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[83b242c] | 363 | void og_schedule_create(unsigned int schedule_id, unsigned int task_id, |
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[63c4ea5] | 364 | enum og_schedule_type type, |
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[83b242c] | 365 | struct og_schedule_time *time) |
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| 366 | { |
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[130b6ff] | 367 | int year, month, minutes; |
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[83b242c] | 368 | int months[12] = {}; |
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| 369 | int years[12] = {}; |
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| 370 | int hours[12] = {}; |
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| 371 | int days[31] = {}; |
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[130b6ff] | 372 | int i, j; |
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[83b242c] | 373 | |
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| 374 | og_parse_years(time->years, years); |
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| 375 | og_parse_months(time->months, months); |
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| 376 | og_parse_days(time->days, days); |
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| 377 | og_parse_hours(time->hours, time->am_pm, hours); |
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| 378 | minutes = time->minutes; |
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| 379 | |
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| 380 | for (i = 0; years[i] != 0 && i < 12; i++) { |
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| 381 | for (j = 0; months[j] != 0 && j < 12; j++) { |
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[130b6ff] | 382 | month = months[j] - 1; |
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| 383 | year = years[i]; |
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| 384 | |
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| 385 | if (time->week_days) |
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| 386 | og_schedule_create_weekdays(month, year, |
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| 387 | hours, minutes, |
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| 388 | time->week_days, |
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| 389 | task_id, |
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[63c4ea5] | 390 | schedule_id, |
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[6c7d827] | 391 | type, |
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[e68fefe] | 392 | time->check_stale); |
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[130b6ff] | 393 | |
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| 394 | if (time->weeks) |
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| 395 | og_schedule_create_weeks(month, year, |
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| 396 | hours, minutes, |
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| 397 | time->weeks, |
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| 398 | task_id, |
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[63c4ea5] | 399 | schedule_id, |
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[e68fefe] | 400 | type, time->check_stale); |
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[130b6ff] | 401 | |
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| 402 | if (time->days) |
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| 403 | og_schedule_create_days(month, year, |
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| 404 | hours, minutes, |
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| 405 | days, |
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| 406 | task_id, |
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[63c4ea5] | 407 | schedule_id, |
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[e68fefe] | 408 | type, time->check_stale); |
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[83b242c] | 409 | } |
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| 410 | } |
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| 411 | |
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| 412 | og_schedule_remove_duplicates(); |
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| 413 | } |
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| 414 | |
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| 415 | void og_schedule_delete(struct ev_loop *loop, uint32_t schedule_id) |
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| 416 | { |
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| 417 | struct og_schedule *schedule, *next; |
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| 418 | |
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| 419 | list_for_each_entry_safe(schedule, next, &schedule_list, list) { |
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| 420 | if (schedule->schedule_id != schedule_id) |
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| 421 | continue; |
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| 422 | |
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| 423 | list_del(&schedule->list); |
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| 424 | if (current_schedule == schedule) { |
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| 425 | ev_timer_stop(loop, &schedule->timer); |
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| 426 | current_schedule = NULL; |
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| 427 | og_schedule_refresh(loop); |
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| 428 | } |
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| 429 | free(schedule); |
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| 430 | } |
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| 431 | } |
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| 432 | |
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| 433 | void og_schedule_update(struct ev_loop *loop, unsigned int schedule_id, |
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| 434 | unsigned int task_id, struct og_schedule_time *time) |
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| 435 | { |
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| 436 | og_schedule_delete(loop, schedule_id); |
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[63c4ea5] | 437 | og_schedule_create(schedule_id, task_id, OG_SCHEDULE_TASK, time); |
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[83b242c] | 438 | } |
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| 439 | |
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| 440 | static void og_agent_timer_cb(struct ev_loop *loop, ev_timer *timer, int events) |
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| 441 | { |
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| 442 | struct og_schedule *current; |
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| 443 | |
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| 444 | current = container_of(timer, struct og_schedule, timer); |
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[894d833] | 445 | og_schedule_run(current->task_id, current->schedule_id, current->type); |
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[83b242c] | 446 | |
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| 447 | ev_timer_stop(loop, timer); |
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| 448 | list_del(¤t->list); |
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| 449 | free(current); |
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| 450 | |
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| 451 | og_schedule_next(loop); |
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| 452 | } |
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| 453 | |
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| 454 | void og_schedule_next(struct ev_loop *loop) |
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| 455 | { |
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| 456 | struct og_schedule *schedule; |
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| 457 | time_t now, seconds; |
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| 458 | |
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| 459 | if (list_empty(&schedule_list)) { |
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| 460 | current_schedule = NULL; |
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| 461 | return; |
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| 462 | } |
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| 463 | |
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| 464 | schedule = list_first_entry(&schedule_list, struct og_schedule, list); |
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| 465 | now = time(NULL); |
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| 466 | if (schedule->seconds <= now) |
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| 467 | seconds = 0; |
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| 468 | else |
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| 469 | seconds = schedule->seconds - now; |
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| 470 | |
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| 471 | ev_timer_init(&schedule->timer, og_agent_timer_cb, seconds, 0.); |
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| 472 | ev_timer_start(loop, &schedule->timer); |
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| 473 | current_schedule = schedule; |
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| 474 | } |
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| 475 | |
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| 476 | void og_schedule_refresh(struct ev_loop *loop) |
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| 477 | { |
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| 478 | if (current_schedule) |
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| 479 | ev_timer_stop(loop, ¤t_schedule->timer); |
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| 480 | |
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| 481 | og_schedule_next(loop); |
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| 482 | } |
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