granicus.if.org Git - icinga2/blob - lib/icinga/legacytimeperiod.cpp

   1 /******************************************************************************
   2  * Icinga 2                                                                   *
   3  * Copyright (C) 2012-2018 Icinga Development Team (https://www.icinga.com/)  *
   4  *                                                                            *
   5  * This program is free software; you can redistribute it and/or              *
   6  * modify it under the terms of the GNU General Public License                *
   7  * as published by the Free Software Foundation; either version 2             *
   8  * of the License, or (at your option) any later version.                     *
   9  *                                                                            *
  10  * This program is distributed in the hope that it will be useful,            *
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of             *
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              *
  13  * GNU General Public License for more details.                               *
  14  *                                                                            *
  15  * You should have received a copy of the GNU General Public License          *
  16  * along with this program; if not, write to the Free Software Foundation     *
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.             *
  18  ******************************************************************************/
  19
  20 #include "icinga/legacytimeperiod.hpp"
  21 #include "base/function.hpp"
  22 #include "base/convert.hpp"
  23 #include "base/exception.hpp"
  24 #include "base/objectlock.hpp"
  25 #include "base/logger.hpp"
  26 #include "base/debug.hpp"
  27 #include "base/utility.hpp"
  28
  29 using namespace icinga;
  30
  31 REGISTER_FUNCTION_NONCONST(Internal, LegacyTimePeriod, &LegacyTimePeriod::ScriptFunc, "tp:begin:end");
  32
  33 bool LegacyTimePeriod::IsInTimeRange(tm *begin, tm *end, int stride, tm *reference)
  34 {
  35         time_t tsbegin, tsend, tsref;
  36         tsbegin = mktime(begin);
  37         tsend = mktime(end);
  38         tsref = mktime(reference);
  39
  40         if (tsref < tsbegin || tsref > tsend)
  41                 return false;
  42
  43         int daynumber = (tsref - tsbegin) / (24 * 60 * 60);
  44
  45         if (stride > 1 && daynumber % stride == 0)
  46                 return false;
  47
  48         return true;
  49 }
  50
  51 void LegacyTimePeriod::FindNthWeekday(int wday, int n, tm *reference)
  52 {
  53         int dir, seen = 0;
  54
  55         if (n > 0) {
  56                 dir = 1;
  57         } else {
  58                 n *= -1;
  59                 dir = -1;
  60
  61                 /* Negative days are relative to the next month. */
  62                 reference->tm_mon++;
  63         }
  64
  65         ASSERT(n > 0);
  66
  67         reference->tm_mday = 1;
  68
  69         for (;;) {
  70                 mktime(reference);
  71
  72                 if (reference->tm_wday == wday) {
  73                         seen++;
  74
  75                         if (seen == n)
  76                                 return;
  77                 }
  78
  79                 reference->tm_mday += dir;
  80         }
  81 }
  82
  83 int LegacyTimePeriod::WeekdayFromString(const String& daydef)
  84 {
  85         if (daydef == "sunday")
  86                 return 0;
  87         else if (daydef == "monday")
  88                 return 1;
  89         else if (daydef == "tuesday")
  90                 return 2;
  91         else if (daydef == "wednesday")
  92                 return 3;
  93         else if (daydef == "thursday")
  94                 return 4;
  95         else if (daydef == "friday")
  96                 return 5;
  97         else if (daydef == "saturday")
  98                 return 6;
  99         else
 100                 return -1;
 101 }
 102
 103 int LegacyTimePeriod::MonthFromString(const String& monthdef)
 104 {
 105         if (monthdef == "january")
 106                 return 0;
 107         else if (monthdef == "february")
 108                 return 1;
 109         else if (monthdef == "march")
 110                 return 2;
 111         else if (monthdef == "april")
 112                 return 3;
 113         else if (monthdef == "may")
 114                 return 4;
 115         else if (monthdef == "june")
 116                 return 5;
 117         else if (monthdef == "july")
 118                 return 6;
 119         else if (monthdef == "august")
 120                 return 7;
 121         else if (monthdef == "september")
 122                 return 8;
 123         else if (monthdef == "october")
 124                 return 9;
 125         else if (monthdef == "november")
 126                 return 10;
 127         else if (monthdef == "december")
 128                 return 11;
 129         else
 130                 return -1;
 131 }
 132
 133 void LegacyTimePeriod::ParseTimeSpec(const String& timespec, tm *begin, tm *end, tm *reference)
 134 {
 135         /* Let mktime() figure out whether we're in DST or not. */
 136         reference->tm_isdst = -1;
 137
 138         /* YYYY-MM-DD */
 139         if (timespec.GetLength() == 10 && timespec[4] == '-' && timespec[7] == '-') {
 140                 int year = Convert::ToLong(timespec.SubStr(0, 4));
 141                 int month = Convert::ToLong(timespec.SubStr(5, 2));
 142                 int day = Convert::ToLong(timespec.SubStr(8, 2));
 143
 144                 if (month < 1 || month > 12)
 145                         BOOST_THROW_EXCEPTION(std::invalid_argument("Invalid month in time specification: " + timespec));
 146                 if (day < 1 || day > 31)
 147                         BOOST_THROW_EXCEPTION(std::invalid_argument("Invalid day in time specification: " + timespec));
 148
 149                 if (begin) {
 150                         *begin = *reference;
 151                         begin->tm_year = year - 1900;
 152                         begin->tm_mon = month - 1;
 153                         begin->tm_mday = day;
 154                         begin->tm_hour = 0;
 155                         begin->tm_min = 0;
 156                         begin->tm_sec = 0;
 157                 }
 158
 159                 if (end) {
 160                         *end = *reference;
 161                         end->tm_year = year - 1900;
 162                         end->tm_mon = month - 1;
 163                         end->tm_mday = day;
 164                         end->tm_hour = 24;
 165                         end->tm_min = 0;
 166                         end->tm_sec = 0;
 167                 }
 168
 169                 return;
 170         }
 171
 172         std::vector<String> tokens = timespec.Split(" ");
 173
 174         int mon = -1;
 175
 176         if (tokens.size() > 1 && (tokens[0] == "day" || (mon = MonthFromString(tokens[0])) != -1)) {
 177                 if (mon == -1)
 178                         mon = reference->tm_mon;
 179
 180                 int mday = Convert::ToLong(tokens[1]);
 181
 182                 if (begin) {
 183                         *begin = *reference;
 184                         begin->tm_mon = mon;
 185                         begin->tm_mday = mday;
 186                         begin->tm_hour = 0;
 187                         begin->tm_min = 0;
 188                         begin->tm_sec = 0;
 189
 190                         /* Negative days are relative to the next month. */
 191                         if (mday < 0) {
 192                                 begin->tm_mday = mday * -1 - 1;
 193                                 begin->tm_mon++;
 194                         }
 195                 }
 196
 197                 if (end) {
 198                         *end = *reference;
 199                         end->tm_mon = mon;
 200                         end->tm_mday = mday;
 201                         end->tm_hour = 24;
 202                         end->tm_min = 0;
 203                         end->tm_sec = 0;
 204
 205                         /* Negative days are relative to the next month. */
 206                         if (mday < 0) {
 207                                 end->tm_mday = mday * -1 - 1;
 208                                 end->tm_mon++;
 209                         }
 210                 }
 211
 212                 return;
 213         }
 214
 215         int wday;
 216
 217         if (tokens.size() >= 1 && (wday = WeekdayFromString(tokens[0])) != -1) {
 218                 tm myref = *reference;
 219
 220                 if (tokens.size() > 2) {
 221                         mon = MonthFromString(tokens[2]);
 222
 223                         if (mon == -1)
 224                                 BOOST_THROW_EXCEPTION(std::invalid_argument("Invalid month in time specification: " + timespec));
 225
 226                         myref.tm_mon = mon;
 227                 }
 228
 229                 int n = 0;
 230
 231                 if (tokens.size() > 1)
 232                         n = Convert::ToLong(tokens[1]);
 233
 234                 if (begin) {
 235                         *begin = myref;
 236
 237                         if (tokens.size() > 1)
 238                                 FindNthWeekday(wday, n, begin);
 239                         else
 240                                 begin->tm_mday += (7 - begin->tm_wday + wday) % 7;
 241
 242                         begin->tm_hour = 0;
 243                         begin->tm_min = 0;
 244                         begin->tm_sec = 0;
 245                 }
 246
 247                 if (end) {
 248                         *end = myref;
 249
 250                         if (tokens.size() > 1)
 251                                 FindNthWeekday(wday, n, end);
 252                         else
 253                                 end->tm_mday += (7 - end->tm_wday + wday) % 7;
 254
 255                         end->tm_hour = 0;
 256                         end->tm_min = 0;
 257                         end->tm_sec = 0;
 258                         end->tm_mday++;
 259                 }
 260
 261                 return;
 262         }
 263
 264         BOOST_THROW_EXCEPTION(std::invalid_argument("Invalid time specification: " + timespec));
 265 }
 266
 267 void LegacyTimePeriod::ParseTimeRange(const String& timerange, tm *begin, tm *end, int *stride, tm *reference)
 268 {
 269         String def = timerange;
 270
 271         /* Figure out the stride. */
 272         size_t pos = def.FindFirstOf('/');
 273
 274         if (pos != String::NPos) {
 275                 String strStride = def.SubStr(pos + 1).Trim();
 276                 *stride = Convert::ToLong(strStride);
 277
 278                 /* Remove the stride parameter from the definition. */
 279                 def = def.SubStr(0, pos);
 280         } else {
 281                 *stride = 1; /* User didn't specify anything, assume default. */
 282         }
 283
 284         /* Figure out whether the user has specified two dates. */
 285         pos = def.Find("- ");
 286
 287         if (pos != String::NPos) {
 288                 String first = def.SubStr(0, pos).Trim();
 289
 290                 String second = def.SubStr(pos + 1).Trim();
 291
 292                 ParseTimeSpec(first, begin, nullptr, reference);
 293
 294                 /* If the second definition starts with a number we need
 295                  * to add the first word from the first definition, e.g.:
 296                  * day 1 - 15 --> "day 15" */
 297                 bool is_number = true;
 298                 size_t xpos = second.FindFirstOf(' ');
 299                 String fword = second.SubStr(0, xpos);
 300
 301                 try {
 302                         Convert::ToLong(fword);
 303                 } catch (...) {
 304                         is_number = false;
 305                 }
 306
 307                 if (is_number) {
 308                         xpos = first.FindFirstOf(' ');
 309                         ASSERT(xpos != String::NPos);
 310                         second = first.SubStr(0, xpos + 1) + second;
 311                 }
 312
 313                 ParseTimeSpec(second, nullptr, end, reference);
 314         } else {
 315                 ParseTimeSpec(def, begin, end, reference);
 316         }
 317 }
 318
 319 bool LegacyTimePeriod::IsInDayDefinition(const String& daydef, tm *reference)
 320 {
 321         tm begin, end;
 322         int stride;
 323
 324         ParseTimeRange(daydef, &begin, &end, &stride, reference);
 325
 326         Log(LogDebug, "LegacyTimePeriod")
 327                 << "ParseTimeRange: '" << daydef << "' => " << mktime(&begin)
 328                 << " -> " << mktime(&end) << ", stride: " << stride;
 329
 330         return IsInTimeRange(&begin, &end, stride, reference);
 331 }
 332
 333 void LegacyTimePeriod::ProcessTimeRangeRaw(const String& timerange, tm *reference, tm *begin, tm *end)
 334 {
 335         std::vector<String> times = timerange.Split("-");
 336
 337         if (times.size() != 2)
 338                 BOOST_THROW_EXCEPTION(std::invalid_argument("Invalid timerange: " + timerange));
 339
 340         std::vector<String> hd1 = times[0].Split(":");
 341
 342         if (hd1.size() != 2)
 343                 BOOST_THROW_EXCEPTION(std::invalid_argument("Invalid time specification: " + times[0]));
 344
 345         std::vector<String> hd2 = times[1].Split(":");
 346
 347         if (hd2.size() != 2)
 348                 BOOST_THROW_EXCEPTION(std::invalid_argument("Invalid time specification: " + times[1]));
 349
 350         *begin = *reference;
 351         begin->tm_sec = 0;
 352         begin->tm_min = Convert::ToLong(hd1[1]);
 353         begin->tm_hour = Convert::ToLong(hd1[0]);
 354
 355         *end = *reference;
 356         end->tm_sec = 0;
 357         end->tm_min = Convert::ToLong(hd2[1]);
 358         end->tm_hour = Convert::ToLong(hd2[0]);
 359
 360         if (begin->tm_hour * 3600 + begin->tm_min * 60 + begin->tm_sec >=
 361                 end->tm_hour * 3600 + end->tm_min * 60 + end->tm_sec)
 362                 BOOST_THROW_EXCEPTION(std::invalid_argument("Time period segment ends before it begins"));
 363 }
 364
 365 Dictionary::Ptr LegacyTimePeriod::ProcessTimeRange(const String& timestamp, tm *reference)
 366 {
 367         tm begin, end;
 368
 369         ProcessTimeRangeRaw(timestamp, reference, &begin, &end);
 370
 371         return new Dictionary({
 372                 { "begin", (long)mktime(&begin) },
 373                 { "end", (long)mktime(&end) }
 374         });
 375 }
 376
 377 void LegacyTimePeriod::ProcessTimeRanges(const String& timeranges, tm *reference, const Array::Ptr& result)
 378 {
 379         std::vector<String> ranges = timeranges.Split(",");
 380
 381         for (const String& range : ranges) {
 382                 Dictionary::Ptr segment = ProcessTimeRange(range, reference);
 383
 384                 if (segment->Get("begin") >= segment->Get("end"))
 385                         continue;
 386
 387                 result->Add(segment);
 388         }
 389 }
 390
 391 Dictionary::Ptr LegacyTimePeriod::FindNextSegment(const String& daydef, const String& timeranges, tm *reference)
 392 {
 393         tm begin, end, iter, ref;
 394         time_t tsend, tsiter, tsref;
 395         int stride;
 396
 397         for (int pass = 1; pass <= 2; pass++) {
 398                 if (pass == 1) {
 399                         ref = *reference;
 400                 } else {
 401                         ref = end;
 402                         ref.tm_mday++;
 403                 }
 404
 405                 tsref = mktime(&ref);
 406
 407                 ParseTimeRange(daydef, &begin, &end, &stride, &ref);
 408
 409                 iter = begin;
 410
 411                 tsend = mktime(&end);
 412
 413                 do {
 414                         if (IsInTimeRange(&begin, &end, stride, &iter)) {
 415                                 Array::Ptr segments = new Array();
 416                                 ProcessTimeRanges(timeranges, &iter, segments);
 417
 418                                 Dictionary::Ptr bestSegment;
 419                                 double bestBegin;
 420
 421                                 ObjectLock olock(segments);
 422                                 for (const Dictionary::Ptr& segment : segments) {
 423                                         double begin = segment->Get("begin");
 424
 425                                         if (begin < tsref)
 426                                                 continue;
 427
 428                                         if (!bestSegment || begin < bestBegin) {
 429                                                 bestSegment = segment;
 430                                                 bestBegin = begin;
 431                                         }
 432                                 }
 433
 434                                 if (bestSegment)
 435                                         return bestSegment;
 436                         }
 437
 438                         iter.tm_mday++;
 439                         iter.tm_hour = 0;
 440                         iter.tm_min = 0;
 441                         iter.tm_sec = 0;
 442                         tsiter = mktime(&iter);
 443                 } while (tsiter < tsend);
 444         }
 445
 446         return nullptr;
 447 }
 448
 449 Array::Ptr LegacyTimePeriod::ScriptFunc(const TimePeriod::Ptr& tp, double begin, double end)
 450 {
 451         Array::Ptr segments = new Array();
 452
 453         Dictionary::Ptr ranges = tp->GetRanges();
 454
 455         if (ranges) {
 456                 for (int i = 0; i <= (end - begin) / (24 * 60 * 60); i++) {
 457                         time_t refts = begin + i * 24 * 60 * 60;
 458                         tm reference = Utility::LocalTime(refts);
 459
 460 #ifdef I2_DEBUG
 461                         Log(LogDebug, "LegacyTimePeriod")
 462                                 << "Checking reference time " << refts;
 463 #endif /* I2_DEBUG */
 464
 465                         ObjectLock olock(ranges);
 466                         for (const Dictionary::Pair& kv : ranges) {
 467                                 if (!IsInDayDefinition(kv.first, &reference)) {
 468 #ifdef I2_DEBUG
 469                                         Log(LogDebug, "LegacyTimePeriod")
 470                                                 << "Not in day definition '" << kv.first << "'.";
 471 #endif /* I2_DEBUG */
 472                                         continue;
 473                                 }
 474
 475 #ifdef I2_DEBUG
 476                                 Log(LogDebug, "LegacyTimePeriod")
 477                                         << "In day definition '" << kv.first << "'.";
 478 #endif /* I2_DEBUG */
 479
 480                                 ProcessTimeRanges(kv.second, &reference, segments);
 481                         }
 482                 }
 483         }
 484
 485         Log(LogDebug, "LegacyTimePeriod")
 486                 << "Legacy timeperiod update returned " << segments->GetLength() << " segments.";
 487
 488         return segments;
 489 }