src/shared/conf-parser.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <errno.h>
   4 #include <limits.h>
   5 #include <stdint.h>
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8 #include <sys/types.h>
   9
  10 #include "alloc-util.h"
  11 #include "conf-files.h"
  12 #include "conf-parser.h"
  13 #include "def.h"
  14 #include "dns-domain.h"
  15 #include "escape.h"
  16 #include "ether-addr-util.h"
  17 #include "extract-word.h"
  18 #include "fd-util.h"
  19 #include "fileio.h"
  20 #include "fs-util.h"
  21 #include "hostname-util.h"
  22 #include "in-addr-util.h"
  23 #include "log.h"
  24 #include "macro.h"
  25 #include "missing_network.h"
  26 #include "nulstr-util.h"
  27 #include "parse-util.h"
  28 #include "path-util.h"
  29 #include "percent-util.h"
  30 #include "process-util.h"
  31 #include "rlimit-util.h"
  32 #include "sd-id128.h"
  33 #include "set.h"
  34 #include "signal-util.h"
  35 #include "socket-util.h"
  36 #include "string-util.h"
  37 #include "strv.h"
  38 #include "syslog-util.h"
  39 #include "time-util.h"
  40 #include "utf8.h"
  41
  42 int config_item_table_lookup(
  43                 const void *table,
  44                 const char *section,
  45                 const char *lvalue,
  46                 ConfigParserCallback *ret_func,
  47                 int *ret_ltype,
  48                 void **ret_data,
  49                 void *userdata) {
  50
  51         const ConfigTableItem *t;
  52
  53         assert(table);
  54         assert(lvalue);
  55         assert(ret_func);
  56         assert(ret_ltype);
  57         assert(ret_data);
  58
  59         for (t = table; t->lvalue; t++) {
  60
  61                 if (!streq(lvalue, t->lvalue))
  62                         continue;
  63
  64                 if (!streq_ptr(section, t->section))
  65                         continue;
  66
  67                 *ret_func = t->parse;
  68                 *ret_ltype = t->ltype;
  69                 *ret_data = t->data;
  70                 return 1;
  71         }
  72
  73         *ret_func = NULL;
  74         *ret_ltype = 0;
  75         *ret_data = NULL;
  76         return 0;
  77 }
  78
  79 int config_item_perf_lookup(
  80                 const void *table,
  81                 const char *section,
  82                 const char *lvalue,
  83                 ConfigParserCallback *ret_func,
  84                 int *ret_ltype,
  85                 void **ret_data,
  86                 void *userdata) {
  87
  88         ConfigPerfItemLookup lookup = (ConfigPerfItemLookup) table;
  89         const ConfigPerfItem *p;
  90
  91         assert(table);
  92         assert(lvalue);
  93         assert(ret_func);
  94         assert(ret_ltype);
  95         assert(ret_data);
  96
  97         if (section) {
  98                 const char *key;
  99
 100                 key = strjoina(section, ".", lvalue);
 101                 p = lookup(key, strlen(key));
 102         } else
 103                 p = lookup(lvalue, strlen(lvalue));
 104         if (!p) {
 105                 *ret_func = NULL;
 106                 *ret_ltype = 0;
 107                 *ret_data = NULL;
 108                 return 0;
 109         }
 110
 111         *ret_func = p->parse;
 112         *ret_ltype = p->ltype;
 113         *ret_data = (uint8_t*) userdata + p->offset;
 114         return 1;
 115 }
 116
 117 /* Run the user supplied parser for an assignment */
 118 static int next_assignment(
 119                 const char *unit,
 120                 const char *filename,
 121                 unsigned line,
 122                 ConfigItemLookup lookup,
 123                 const void *table,
 124                 const char *section,
 125                 unsigned section_line,
 126                 const char *lvalue,
 127                 const char *rvalue,
 128                 ConfigParseFlags flags,
 129                 void *userdata) {
 130
 131         ConfigParserCallback func = NULL;
 132         int ltype = 0;
 133         void *data = NULL;
 134         int r;
 135
 136         assert(filename);
 137         assert(line > 0);
 138         assert(lookup);
 139         assert(lvalue);
 140         assert(rvalue);
 141
 142         r = lookup(table, section, lvalue, &func, &ltype, &data, userdata);
 143         if (r < 0)
 144                 return r;
 145         if (r > 0) {
 146                 if (!func)
 147                         return 0;
 148
 149                 return func(unit, filename, line, section, section_line,
 150                             lvalue, ltype, rvalue, data, userdata);
 151         }
 152
 153         /* Warn about unknown non-extension fields. */
 154         if (!(flags & CONFIG_PARSE_RELAXED) && !startswith(lvalue, "X-"))
 155                 log_syntax(unit, LOG_WARNING, filename, line, 0,
 156                            "Unknown key name '%s' in section '%s', ignoring.", lvalue, section);
 157
 158         return 0;
 159 }
 160
 161 /* Parse a single logical line */
 162 static int parse_line(
 163                 const char* unit,
 164                 const char *filename,
 165                 unsigned line,
 166                 const char *sections,
 167                 ConfigItemLookup lookup,
 168                 const void *table,
 169                 ConfigParseFlags flags,
 170                 char **section,
 171                 unsigned *section_line,
 172                 bool *section_ignored,
 173                 char *l, /* is modified */
 174                 void *userdata) {
 175
 176         char *e;
 177
 178         assert(filename);
 179         assert(line > 0);
 180         assert(lookup);
 181         assert(l);
 182
 183         l = strstrip(l);
 184         if (isempty(l))
 185                 return 0;
 186
 187         if (l[0] == '\n')
 188                 return 0;
 189
 190         if (!utf8_is_valid(l))
 191                 return log_syntax_invalid_utf8(unit, LOG_WARNING, filename, line, l);
 192
 193         if (l[0] == '[') {
 194                 _cleanup_free_ char *n = NULL;
 195                 size_t k;
 196
 197                 k = strlen(l);
 198                 assert(k > 0);
 199
 200                 if (l[k-1] != ']')
 201                         return log_syntax(unit, LOG_ERR, filename, line, SYNTHETIC_ERRNO(EBADMSG), "Invalid section header '%s'", l);
 202
 203                 n = strndup(l+1, k-2);
 204                 if (!n)
 205                         return log_oom();
 206
 207                 if (!string_is_safe(n))
 208                         return log_syntax(unit, LOG_ERR, filename, line, SYNTHETIC_ERRNO(EBADMSG), "Bad characters in section header '%s'", l);
 209
 210                 if (sections && !nulstr_contains(sections, n)) {
 211                         bool ignore;
 212                         const char *t;
 213
 214                         ignore = (flags & CONFIG_PARSE_RELAXED) || startswith(n, "X-");
 215
 216                         if (!ignore)
 217                                 NULSTR_FOREACH(t, sections)
 218                                         if (streq_ptr(n, startswith(t, "-"))) { /* Ignore sections prefixed with "-" in valid section list */
 219                                                 ignore = true;
 220                                                 break;
 221                                         }
 222
 223                         if (!ignore)
 224                                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Unknown section '%s'. Ignoring.", n);
 225
 226                         *section = mfree(*section);
 227                         *section_line = 0;
 228                         *section_ignored = true;
 229                 } else {
 230                         free_and_replace(*section, n);
 231                         *section_line = line;
 232                         *section_ignored = false;
 233                 }
 234
 235                 return 0;
 236         }
 237
 238         if (sections && !*section) {
 239                 if (!(flags & CONFIG_PARSE_RELAXED) && !*section_ignored)
 240                         log_syntax(unit, LOG_WARNING, filename, line, 0, "Assignment outside of section. Ignoring.");
 241
 242                 return 0;
 243         }
 244
 245         e = strchr(l, '=');
 246         if (!e)
 247                 return log_syntax(unit, LOG_WARNING, filename, line, 0,
 248                                   "Missing '=', ignoring line.");
 249         if (e == l)
 250                 return log_syntax(unit, LOG_WARNING, filename, line, 0,
 251                                   "Missing key name before '=', ignoring line.");
 252
 253         *e = 0;
 254         e++;
 255
 256         return next_assignment(unit,
 257                                filename,
 258                                line,
 259                                lookup,
 260                                table,
 261                                *section,
 262                                *section_line,
 263                                strstrip(l),
 264                                strstrip(e),
 265                                flags,
 266                                userdata);
 267 }
 268
 269 /* Go through the file and parse each line */
 270 int config_parse(
 271                 const char *unit,
 272                 const char *filename,
 273                 FILE *f,
 274                 const char *sections,
 275                 ConfigItemLookup lookup,
 276                 const void *table,
 277                 ConfigParseFlags flags,
 278                 void *userdata,
 279                 struct stat *ret_stat) {
 280
 281         _cleanup_free_ char *section = NULL, *continuation = NULL;
 282         _cleanup_fclose_ FILE *ours = NULL;
 283         unsigned line = 0, section_line = 0;
 284         bool section_ignored = false, bom_seen = false;
 285         struct stat st;
 286         int r, fd;
 287
 288         assert(filename);
 289         assert(lookup);
 290
 291         if (!f) {
 292                 f = ours = fopen(filename, "re");
 293                 if (!f) {
 294                         /* Only log on request, except for ENOENT,
 295                          * since we return 0 to the caller. */
 296                         if ((flags & CONFIG_PARSE_WARN) || errno == ENOENT)
 297                                 log_full_errno(errno == ENOENT ? LOG_DEBUG : LOG_ERR, errno,
 298                                                "Failed to open configuration file '%s': %m", filename);
 299
 300                         if (errno == ENOENT) {
 301                                 if (ret_stat)
 302                                         *ret_stat = (struct stat) {};
 303
 304                                 return 0;
 305                         }
 306
 307                         return -errno;
 308                 }
 309         }
 310
 311         fd = fileno(f);
 312         if (fd >= 0) { /* stream might not have an fd, let's be careful hence */
 313
 314                 if (fstat(fd, &st) < 0)
 315                         return log_full_errno(FLAGS_SET(flags, CONFIG_PARSE_WARN) ? LOG_ERR : LOG_DEBUG, errno,
 316                                               "Failed to fstat(%s): %m", filename);
 317
 318                 (void) stat_warn_permissions(filename, &st);
 319         } else
 320                 st = (struct stat) {};
 321
 322         for (;;) {
 323                 _cleanup_free_ char *buf = NULL;
 324                 bool escaped = false;
 325                 char *l, *p, *e;
 326
 327                 r = read_line(f, LONG_LINE_MAX, &buf);
 328                 if (r == 0)
 329                         break;
 330                 if (r == -ENOBUFS) {
 331                         if (flags & CONFIG_PARSE_WARN)
 332                                 log_error_errno(r, "%s:%u: Line too long", filename, line);
 333
 334                         return r;
 335                 }
 336                 if (r < 0) {
 337                         if (FLAGS_SET(flags, CONFIG_PARSE_WARN))
 338                                 log_error_errno(r, "%s:%u: Error while reading configuration file: %m", filename, line);
 339
 340                         return r;
 341                 }
 342
 343                 line++;
 344
 345                 l = skip_leading_chars(buf, WHITESPACE);
 346                 if (*l != '\0' && strchr(COMMENTS, *l))
 347                         continue;
 348
 349                 l = buf;
 350                 if (!bom_seen) {
 351                         char *q;
 352
 353                         q = startswith(buf, UTF8_BYTE_ORDER_MARK);
 354                         if (q) {
 355                                 l = q;
 356                                 bom_seen = true;
 357                         }
 358                 }
 359
 360                 if (continuation) {
 361                         if (strlen(continuation) + strlen(l) > LONG_LINE_MAX) {
 362                                 if (flags & CONFIG_PARSE_WARN)
 363                                         log_error("%s:%u: Continuation line too long", filename, line);
 364                                 return -ENOBUFS;
 365                         }
 366
 367                         if (!strextend(&continuation, l)) {
 368                                 if (flags & CONFIG_PARSE_WARN)
 369                                         log_oom();
 370                                 return -ENOMEM;
 371                         }
 372
 373                         p = continuation;
 374                 } else
 375                         p = l;
 376
 377                 for (e = p; *e; e++) {
 378                         if (escaped)
 379                                 escaped = false;
 380                         else if (*e == '\\')
 381                                 escaped = true;
 382                 }
 383
 384                 if (escaped) {
 385                         *(e-1) = ' ';
 386
 387                         if (!continuation) {
 388                                 continuation = strdup(l);
 389                                 if (!continuation) {
 390                                         if (flags & CONFIG_PARSE_WARN)
 391                                                 log_oom();
 392                                         return -ENOMEM;
 393                                 }
 394                         }
 395
 396                         continue;
 397                 }
 398
 399                 r = parse_line(unit,
 400                                filename,
 401                                line,
 402                                sections,
 403                                lookup,
 404                                table,
 405                                flags,
 406                                &section,
 407                                &section_line,
 408                                &section_ignored,
 409                                p,
 410                                userdata);
 411                 if (r < 0) {
 412                         if (flags & CONFIG_PARSE_WARN)
 413                                 log_warning_errno(r, "%s:%u: Failed to parse file: %m", filename, line);
 414                         return r;
 415                 }
 416
 417                 continuation = mfree(continuation);
 418         }
 419
 420         if (continuation) {
 421                 r = parse_line(unit,
 422                                filename,
 423                                ++line,
 424                                sections,
 425                                lookup,
 426                                table,
 427                                flags,
 428                                &section,
 429                                &section_line,
 430                                &section_ignored,
 431                                continuation,
 432                                userdata);
 433                 if (r < 0) {
 434                         if (flags & CONFIG_PARSE_WARN)
 435                                 log_warning_errno(r, "%s:%u: Failed to parse file: %m", filename, line);
 436                         return r;
 437                 }
 438         }
 439
 440         if (ret_stat)
 441                 *ret_stat = st;
 442
 443         return 1;
 444 }
 445
 446 static int hashmap_put_stats_by_path(Hashmap **stats_by_path, const char *path, const struct stat *st) {
 447         _cleanup_free_ struct stat *st_copy = NULL;
 448         _cleanup_free_ char *path_copy = NULL;
 449         int r;
 450
 451         assert(stats_by_path);
 452         assert(path);
 453         assert(st);
 454
 455         r = hashmap_ensure_allocated(stats_by_path, &path_hash_ops_free_free);
 456         if (r < 0)
 457                 return r;
 458
 459         st_copy = newdup(struct stat, st, 1);
 460         if (!st_copy)
 461                 return -ENOMEM;
 462
 463         path_copy = strdup(path);
 464         if (!path)
 465                 return -ENOMEM;
 466
 467         r = hashmap_put(*stats_by_path, path_copy, st_copy);
 468         if (r < 0)
 469                 return r;
 470
 471         assert(r > 0);
 472         TAKE_PTR(path_copy);
 473         TAKE_PTR(st_copy);
 474         return 0;
 475 }
 476
 477 static int config_parse_many_files(
 478                 const char* const* conf_files,
 479                 char **files,
 480                 const char *sections,
 481                 ConfigItemLookup lookup,
 482                 const void *table,
 483                 ConfigParseFlags flags,
 484                 void *userdata,
 485                 Hashmap **ret_stats_by_path) {
 486
 487         _cleanup_hashmap_free_ Hashmap *stats_by_path = NULL;
 488         struct stat st;
 489         char **fn;
 490         int r;
 491
 492         if (ret_stats_by_path) {
 493                 stats_by_path = hashmap_new(&path_hash_ops_free_free);
 494                 if (!stats_by_path)
 495                         return -ENOMEM;
 496         }
 497
 498         /* First read the first found main config file. */
 499         STRV_FOREACH(fn, (char**) conf_files) {
 500                 r = config_parse(NULL, *fn, NULL, sections, lookup, table, flags, userdata, &st);
 501                 if (r < 0)
 502                         return r;
 503                 if (r == 0)
 504                         continue;
 505
 506                 if (ret_stats_by_path) {
 507                         r = hashmap_put_stats_by_path(&stats_by_path, *fn, &st);
 508                         if (r < 0)
 509                                 return r;
 510                 }
 511
 512                 break;
 513         }
 514
 515         /* Then read all the drop-ins. */
 516         STRV_FOREACH(fn, files) {
 517                 r = config_parse(NULL, *fn, NULL, sections, lookup, table, flags, userdata, &st);
 518                 if (r < 0)
 519                         return r;
 520                 if (r == 0)
 521                         continue;
 522
 523                 if (ret_stats_by_path) {
 524                         r = hashmap_put_stats_by_path(&stats_by_path, *fn, &st);
 525                         if (r < 0)
 526                                 return r;
 527                 }
 528         }
 529
 530         if (ret_stats_by_path)
 531                 *ret_stats_by_path = TAKE_PTR(stats_by_path);
 532
 533         return 0;
 534 }
 535
 536 /* Parse each config file in the directories specified as nulstr. */
 537 int config_parse_many_nulstr(
 538                 const char *conf_file,
 539                 const char *conf_file_dirs,
 540                 const char *sections,
 541                 ConfigItemLookup lookup,
 542                 const void *table,
 543                 ConfigParseFlags flags,
 544                 void *userdata,
 545                 Hashmap **ret_stats_by_path) {
 546
 547         _cleanup_strv_free_ char **files = NULL;
 548         int r;
 549
 550         r = conf_files_list_nulstr(&files, ".conf", NULL, 0, conf_file_dirs);
 551         if (r < 0)
 552                 return r;
 553
 554         return config_parse_many_files(STRV_MAKE_CONST(conf_file),
 555                                        files, sections, lookup, table, flags, userdata,
 556                                        ret_stats_by_path);
 557 }
 558
 559 /* Parse each config file in the directories specified as strv. */
 560 int config_parse_many(
 561                 const char* const* conf_files,
 562                 const char* const* conf_file_dirs,
 563                 const char *dropin_dirname,
 564                 const char *sections,
 565                 ConfigItemLookup lookup,
 566                 const void *table,
 567                 ConfigParseFlags flags,
 568                 void *userdata,
 569                 Hashmap **ret_stats_by_path) {
 570
 571         _cleanup_strv_free_ char **dropin_dirs = NULL;
 572         _cleanup_strv_free_ char **files = NULL;
 573         const char *suffix;
 574         int r;
 575
 576         suffix = strjoina("/", dropin_dirname);
 577         r = strv_extend_strv_concat(&dropin_dirs, (char**) conf_file_dirs, suffix);
 578         if (r < 0)
 579                 return r;
 580
 581         r = conf_files_list_strv(&files, ".conf", NULL, 0, (const char* const*) dropin_dirs);
 582         if (r < 0)
 583                 return r;
 584
 585         return config_parse_many_files(conf_files, files, sections, lookup, table, flags, userdata, ret_stats_by_path);
 586 }
 587
 588 static void config_section_hash_func(const ConfigSection *c, struct siphash *state) {
 589         siphash24_compress_string(c->filename, state);
 590         siphash24_compress(&c->line, sizeof(c->line), state);
 591 }
 592
 593 static int config_section_compare_func(const ConfigSection *x, const ConfigSection *y) {
 594         int r;
 595
 596         r = strcmp(x->filename, y->filename);
 597         if (r != 0)
 598                 return r;
 599
 600         return CMP(x->line, y->line);
 601 }
 602
 603 DEFINE_HASH_OPS(config_section_hash_ops, ConfigSection, config_section_hash_func, config_section_compare_func);
 604
 605 int config_section_new(const char *filename, unsigned line, ConfigSection **s) {
 606         ConfigSection *cs;
 607
 608         cs = malloc0(offsetof(ConfigSection, filename) + strlen(filename) + 1);
 609         if (!cs)
 610                 return -ENOMEM;
 611
 612         strcpy(cs->filename, filename);
 613         cs->line = line;
 614
 615         *s = TAKE_PTR(cs);
 616
 617         return 0;
 618 }
 619
 620 unsigned hashmap_find_free_section_line(Hashmap *hashmap) {
 621         ConfigSection *cs;
 622         unsigned n = 0;
 623         void *entry;
 624
 625         HASHMAP_FOREACH_KEY(entry, cs, hashmap)
 626                 if (n < cs->line)
 627                         n = cs->line;
 628
 629         return n + 1;
 630 }
 631
 632 #define DEFINE_PARSER(type, vartype, conv_func)                         \
 633         DEFINE_CONFIG_PARSE_PTR(config_parse_##type, conv_func, vartype, "Failed to parse " #type " value")
 634
 635 DEFINE_PARSER(int, int, safe_atoi);
 636 DEFINE_PARSER(long, long, safe_atoli);
 637 DEFINE_PARSER(uint8, uint8_t, safe_atou8);
 638 DEFINE_PARSER(uint16, uint16_t, safe_atou16);
 639 DEFINE_PARSER(uint32, uint32_t, safe_atou32);
 640 DEFINE_PARSER(int32, int32_t, safe_atoi32);
 641 DEFINE_PARSER(uint64, uint64_t, safe_atou64);
 642 DEFINE_PARSER(unsigned, unsigned, safe_atou);
 643 DEFINE_PARSER(double, double, safe_atod);
 644 DEFINE_PARSER(nsec, nsec_t, parse_nsec);
 645 DEFINE_PARSER(sec, usec_t, parse_sec);
 646 DEFINE_PARSER(sec_def_infinity, usec_t, parse_sec_def_infinity);
 647 DEFINE_PARSER(mode, mode_t, parse_mode);
 648 DEFINE_PARSER(pid, pid_t, parse_pid);
 649
 650 int config_parse_iec_size(
 651                 const char* unit,
 652                 const char *filename,
 653                 unsigned line,
 654                 const char *section,
 655                 unsigned section_line,
 656                 const char *lvalue,
 657                 int ltype,
 658                 const char *rvalue,
 659                 void *data,
 660                 void *userdata) {
 661
 662         size_t *sz = data;
 663         uint64_t v;
 664         int r;
 665
 666         assert(filename);
 667         assert(lvalue);
 668         assert(rvalue);
 669         assert(data);
 670
 671         r = parse_size(rvalue, 1024, &v);
 672         if (r >= 0 && (uint64_t) (size_t) v != v)
 673                 r = -ERANGE;
 674         if (r < 0) {
 675                 log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse size value '%s', ignoring: %m", rvalue);
 676                 return 0;
 677         }
 678
 679         *sz = (size_t) v;
 680         return 0;
 681 }
 682
 683 int config_parse_si_uint64(
 684                 const char* unit,
 685                 const char *filename,
 686                 unsigned line,
 687                 const char *section,
 688                 unsigned section_line,
 689                 const char *lvalue,
 690                 int ltype,
 691                 const char *rvalue,
 692                 void *data,
 693                 void *userdata) {
 694
 695         uint64_t *sz = data;
 696         int r;
 697
 698         assert(filename);
 699         assert(lvalue);
 700         assert(rvalue);
 701         assert(data);
 702
 703         r = parse_size(rvalue, 1000, sz);
 704         if (r < 0)
 705                 log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse size value '%s', ignoring: %m", rvalue);
 706
 707         return 0;
 708 }
 709
 710 int config_parse_iec_uint64(
 711                 const char* unit,
 712                 const char *filename,
 713                 unsigned line,
 714                 const char *section,
 715                 unsigned section_line,
 716                 const char *lvalue,
 717                 int ltype,
 718                 const char *rvalue,
 719                 void *data,
 720                 void *userdata) {
 721
 722         uint64_t *bytes = data;
 723         int r;
 724
 725         assert(filename);
 726         assert(lvalue);
 727         assert(rvalue);
 728         assert(data);
 729
 730         r = parse_size(rvalue, 1024, bytes);
 731         if (r < 0)
 732                 log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 733
 734         return 0;
 735 }
 736
 737 int config_parse_iec_uint64_infinity(
 738                 const char* unit,
 739                 const char *filename,
 740                 unsigned line,
 741                 const char *section,
 742                 unsigned section_line,
 743                 const char *lvalue,
 744                 int ltype,
 745                 const char *rvalue,
 746                 void *data,
 747                 void *userdata) {
 748
 749         uint64_t *bytes = data;
 750
 751         assert(rvalue);
 752         assert(data);
 753
 754         if (streq(rvalue, "infinity")) {
 755                 *bytes = UINT64_MAX;
 756                 return 0;
 757         }
 758
 759         return config_parse_iec_uint64(unit, filename, line, section, section_line, lvalue, ltype, rvalue, data, userdata);
 760 }
 761
 762 int config_parse_bool(
 763                 const char* unit,
 764                 const char *filename,
 765                 unsigned line,
 766                 const char *section,
 767                 unsigned section_line,
 768                 const char *lvalue,
 769                 int ltype,
 770                 const char *rvalue,
 771                 void *data,
 772                 void *userdata) {
 773
 774         int k;
 775         bool *b = data;
 776         bool fatal = ltype;
 777
 778         assert(filename);
 779         assert(lvalue);
 780         assert(rvalue);
 781         assert(data);
 782
 783         k = parse_boolean(rvalue);
 784         if (k < 0) {
 785                 log_syntax(unit, fatal ? LOG_ERR : LOG_WARNING, filename, line, k,
 786                            "Failed to parse boolean value%s: %s",
 787                            fatal ? "" : ", ignoring", rvalue);
 788                 return fatal ? -ENOEXEC : 0;
 789         }
 790
 791         *b = k;
 792         return 0;
 793 }
 794
 795 int config_parse_id128(
 796                 const char *unit,
 797                 const char *filename,
 798                 unsigned line,
 799                 const char *section,
 800                 unsigned section_line,
 801                 const char *lvalue,
 802                 int ltype,
 803                 const char *rvalue,
 804                 void *data,
 805                 void *userdata) {
 806
 807         sd_id128_t t, *result = data;
 808         int r;
 809
 810         assert(filename);
 811         assert(lvalue);
 812         assert(rvalue);
 813
 814         r = sd_id128_from_string(rvalue, &t);
 815         if (r < 0) {
 816                 log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse 128bit ID/UUID, ignoring: %s", rvalue);
 817                 return 0;
 818         }
 819
 820         if (sd_id128_is_null(t)) {
 821                 log_syntax(unit, LOG_WARNING, filename, line, 0, "128bit ID/UUID is all 0, ignoring: %s", rvalue);
 822                 return 0;
 823         }
 824
 825         *result = t;
 826         return 0;
 827 }
 828
 829 int config_parse_tristate(
 830                 const char* unit,
 831                 const char *filename,
 832                 unsigned line,
 833                 const char *section,
 834                 unsigned section_line,
 835                 const char *lvalue,
 836                 int ltype,
 837                 const char *rvalue,
 838                 void *data,
 839                 void *userdata) {
 840
 841         int k, *t = data;
 842
 843         assert(filename);
 844         assert(lvalue);
 845         assert(rvalue);
 846         assert(data);
 847
 848         /* A tristate is pretty much a boolean, except that it can also take an empty string,
 849          * indicating "uninitialized", much like NULL is for a pointer type. */
 850
 851         if (isempty(rvalue)) {
 852                 *t = -1;
 853                 return 0;
 854         }
 855
 856         k = parse_boolean(rvalue);
 857         if (k < 0) {
 858                 log_syntax(unit, LOG_WARNING, filename, line, k,
 859                            "Failed to parse boolean value for %s=, ignoring: %s", lvalue, rvalue);
 860                 return 0;
 861         }
 862
 863         *t = k;
 864         return 0;
 865 }
 866
 867 int config_parse_string(
 868                 const char *unit,
 869                 const char *filename,
 870                 unsigned line,
 871                 const char *section,
 872                 unsigned section_line,
 873                 const char *lvalue,
 874                 int ltype,
 875                 const char *rvalue,
 876                 void *data,
 877                 void *userdata) {
 878
 879         char **s = ASSERT_PTR(data);
 880
 881         assert(filename);
 882         assert(lvalue);
 883         assert(rvalue);
 884
 885         if (isempty(rvalue)) {
 886                 *s = mfree(*s);
 887                 return 0;
 888         }
 889
 890         if (FLAGS_SET(ltype, CONFIG_PARSE_STRING_SAFE) && !string_is_safe(rvalue)) {
 891                 _cleanup_free_ char *escaped = NULL;
 892
 893                 escaped = cescape(rvalue);
 894                 log_syntax(unit, LOG_WARNING, filename, line, 0,
 895                            "Specified string contains unsafe characters, ignoring: %s", strna(escaped));
 896                 return 0;
 897         }
 898
 899         if (FLAGS_SET(ltype, CONFIG_PARSE_STRING_ASCII) && !ascii_is_valid(rvalue)) {
 900                 _cleanup_free_ char *escaped = NULL;
 901
 902                 escaped = cescape(rvalue);
 903                 log_syntax(unit, LOG_WARNING, filename, line, 0,
 904                            "Specified string contains invalid ASCII characters, ignoring: %s", strna(escaped));
 905                 return 0;
 906         }
 907
 908         return free_and_strdup_warn(s, empty_to_null(rvalue));
 909 }
 910
 911 int config_parse_dns_name(
 912                 const char *unit,
 913                 const char *filename,
 914                 unsigned line,
 915                 const char *section,
 916                 unsigned section_line,
 917                 const char *lvalue,
 918                 int ltype,
 919                 const char *rvalue,
 920                 void *data,
 921                 void *userdata) {
 922
 923         char **hostname = ASSERT_PTR(data);
 924         int r;
 925
 926         assert(filename);
 927         assert(lvalue);
 928         assert(rvalue);
 929
 930         if (isempty(rvalue)) {
 931                 *hostname = mfree(*hostname);
 932                 return 0;
 933         }
 934
 935         r = dns_name_is_valid(rvalue);
 936         if (r < 0) {
 937                 log_syntax(unit, LOG_WARNING, filename, line, r,
 938                            "Failed to check validity of DNS domain name '%s', ignoring assignment: %m", rvalue);
 939                 return 0;
 940         }
 941         if (r == 0) {
 942                 log_syntax(unit, LOG_WARNING, filename, line, 0,
 943                            "Specified invalid DNS domain name, ignoring assignment: %s", rvalue);
 944                 return 0;
 945         }
 946
 947         return free_and_strdup_warn(hostname, rvalue);
 948 }
 949
 950 int config_parse_hostname(
 951                 const char *unit,
 952                 const char *filename,
 953                 unsigned line,
 954                 const char *section,
 955                 unsigned section_line,
 956                 const char *lvalue,
 957                 int ltype,
 958                 const char *rvalue,
 959                 void *data,
 960                 void *userdata) {
 961
 962         char **hostname = ASSERT_PTR(data);
 963
 964         assert(filename);
 965         assert(lvalue);
 966         assert(rvalue);
 967
 968         if (isempty(rvalue)) {
 969                 *hostname = mfree(*hostname);
 970                 return 0;
 971         }
 972
 973         if (!hostname_is_valid(rvalue, 0)) {
 974                 log_syntax(unit, LOG_WARNING, filename, line, 0,
 975                            "Specified invalid hostname, ignoring assignment: %s", rvalue);
 976                 return 0;
 977         }
 978
 979         return config_parse_dns_name(unit, filename, line, section, section_line,
 980                                      lvalue, ltype, rvalue, data, userdata);
 981 }
 982
 983 int config_parse_path(
 984                 const char *unit,
 985                 const char *filename,
 986                 unsigned line,
 987                 const char *section,
 988                 unsigned section_line,
 989                 const char *lvalue,
 990                 int ltype,
 991                 const char *rvalue,
 992                 void *data,
 993                 void *userdata) {
 994
 995         _cleanup_free_ char *n = NULL;
 996         bool fatal = ltype;
 997         char **s = data;
 998         int r;
 999
1000         assert(filename);
1001         assert(lvalue);
1002         assert(rvalue);
1003         assert(data);
1004
1005         if (isempty(rvalue))
1006                 goto finalize;
1007
1008         n = strdup(rvalue);
1009         if (!n)
1010                 return log_oom();
1011
1012         r = path_simplify_and_warn(n, PATH_CHECK_ABSOLUTE | (fatal ? PATH_CHECK_FATAL : 0), unit, filename, line, lvalue);
1013         if (r < 0)
1014                 return fatal ? -ENOEXEC : 0;
1015
1016 finalize:
1017         return free_and_replace(*s, n);
1018 }
1019
1020 int config_parse_strv(
1021                 const char *unit,
1022                 const char *filename,
1023                 unsigned line,
1024                 const char *section,
1025                 unsigned section_line,
1026                 const char *lvalue,
1027                 int ltype,
1028                 const char *rvalue,
1029                 void *data,
1030                 void *userdata) {
1031
1032         char ***sv = data;
1033         int r;
1034
1035         assert(filename);
1036         assert(lvalue);
1037         assert(rvalue);
1038         assert(data);
1039
1040         if (isempty(rvalue)) {
1041                 *sv = strv_free(*sv);
1042                 return 0;
1043         }
1044
1045         for (const char *p = rvalue;;) {
1046                 char *word = NULL;
1047
1048                 r = extract_first_word(&p, &word, NULL, EXTRACT_UNQUOTE|EXTRACT_RETAIN_ESCAPE);
1049                 if (r == 0)
1050                         return 0;
1051                 if (r == -ENOMEM)
1052                         return log_oom();
1053                 if (r < 0) {
1054                         log_syntax(unit, LOG_WARNING, filename, line, r, "Invalid syntax, ignoring: %s", rvalue);
1055                         return 0;
1056                 }
1057
1058                 r = strv_consume(sv, word);
1059                 if (r < 0)
1060                         return log_oom();
1061         }
1062 }
1063
1064 int config_parse_warn_compat(
1065                 const char *unit,
1066                 const char *filename,
1067                 unsigned line,
1068                 const char *section,
1069                 unsigned section_line,
1070                 const char *lvalue,
1071                 int ltype,
1072                 const char *rvalue,
1073                 void *data,
1074                 void *userdata) {
1075
1076         Disabled reason = ltype;
1077
1078         switch(reason) {
1079
1080         case DISABLED_CONFIGURATION:
1081                 log_syntax(unit, LOG_DEBUG, filename, line, 0,
1082                            "Support for option %s= has been disabled at compile time and it is ignored", lvalue);
1083                 break;
1084
1085         case DISABLED_LEGACY:
1086                 log_syntax(unit, LOG_INFO, filename, line, 0,
1087                            "Support for option %s= has been removed and it is ignored", lvalue);
1088                 break;
1089
1090         case DISABLED_EXPERIMENTAL:
1091                 log_syntax(unit, LOG_INFO, filename, line, 0,
1092                            "Support for option %s= has not yet been enabled and it is ignored", lvalue);
1093                 break;
1094         }
1095
1096         return 0;
1097 }
1098
1099 int config_parse_log_facility(
1100                 const char *unit,
1101                 const char *filename,
1102                 unsigned line,
1103                 const char *section,
1104                 unsigned section_line,
1105                 const char *lvalue,
1106                 int ltype,
1107                 const char *rvalue,
1108                 void *data,
1109                 void *userdata) {
1110
1111         int *o = data, x;
1112
1113         assert(filename);
1114         assert(lvalue);
1115         assert(rvalue);
1116         assert(data);
1117
1118         x = log_facility_unshifted_from_string(rvalue);
1119         if (x < 0) {
1120                 log_syntax(unit, LOG_WARNING, filename, line, x, "Failed to parse log facility, ignoring: %s", rvalue);
1121                 return 0;
1122         }
1123
1124         *o = (x << 3) | LOG_PRI(*o);
1125
1126         return 0;
1127 }
1128
1129 int config_parse_log_level(
1130                 const char *unit,
1131                 const char *filename,
1132                 unsigned line,
1133                 const char *section,
1134                 unsigned section_line,
1135                 const char *lvalue,
1136                 int ltype,
1137                 const char *rvalue,
1138                 void *data,
1139                 void *userdata) {
1140
1141         int *o = data, x;
1142
1143         assert(filename);
1144         assert(lvalue);
1145         assert(rvalue);
1146         assert(data);
1147
1148         x = log_level_from_string(rvalue);
1149         if (x < 0) {
1150                 log_syntax(unit, LOG_WARNING, filename, line, x, "Failed to parse log level, ignoring: %s", rvalue);
1151                 return 0;
1152         }
1153
1154         if (*o < 0) /* if it wasn't initialized so far, assume zero facility */
1155                 *o = x;
1156         else
1157                 *o = (*o & LOG_FACMASK) | x;
1158
1159         return 0;
1160 }
1161
1162 int config_parse_signal(
1163                 const char *unit,
1164                 const char *filename,
1165                 unsigned line,
1166                 const char *section,
1167                 unsigned section_line,
1168                 const char *lvalue,
1169                 int ltype,
1170                 const char *rvalue,
1171                 void *data,
1172                 void *userdata) {
1173
1174         int *sig = data, r;
1175
1176         assert(filename);
1177         assert(lvalue);
1178         assert(rvalue);
1179         assert(sig);
1180
1181         r = signal_from_string(rvalue);
1182         if (r <= 0) {
1183                 log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse signal name, ignoring: %s", rvalue);
1184                 return 0;
1185         }
1186
1187         *sig = r;
1188         return 0;
1189 }
1190
1191 int config_parse_personality(
1192                 const char *unit,
1193                 const char *filename,
1194                 unsigned line,
1195                 const char *section,
1196                 unsigned section_line,
1197                 const char *lvalue,
1198                 int ltype,
1199                 const char *rvalue,
1200                 void *data,
1201                 void *userdata) {
1202
1203         unsigned long *personality = data, p;
1204
1205         assert(filename);
1206         assert(lvalue);
1207         assert(rvalue);
1208         assert(personality);
1209
1210         if (isempty(rvalue))
1211                 p = PERSONALITY_INVALID;
1212         else {
1213                 p = personality_from_string(rvalue);
1214                 if (p == PERSONALITY_INVALID) {
1215                         log_syntax(unit, LOG_WARNING, filename, line, 0, "Failed to parse personality, ignoring: %s", rvalue);
1216                         return 0;
1217                 }
1218         }
1219
1220         *personality = p;
1221         return 0;
1222 }
1223
1224 int config_parse_ifname(
1225                 const char *unit,
1226                 const char *filename,
1227                 unsigned line,
1228                 const char *section,
1229                 unsigned section_line,
1230                 const char *lvalue,
1231                 int ltype,
1232                 const char *rvalue,
1233                 void *data,
1234                 void *userdata) {
1235
1236         char **s = data;
1237         int r;
1238
1239         assert(filename);
1240         assert(lvalue);
1241         assert(rvalue);
1242         assert(data);
1243
1244         if (isempty(rvalue)) {
1245                 *s = mfree(*s);
1246                 return 0;
1247         }
1248
1249         if (!ifname_valid(rvalue)) {
1250                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Interface name is not valid or too long, ignoring assignment: %s", rvalue);
1251                 return 0;
1252         }
1253
1254         r = free_and_strdup(s, rvalue);
1255         if (r < 0)
1256                 return log_oom();
1257
1258         return 0;
1259 }
1260
1261 int config_parse_ifnames(
1262                 const char *unit,
1263                 const char *filename,
1264                 unsigned line,
1265                 const char *section,
1266                 unsigned section_line,
1267                 const char *lvalue,
1268                 int ltype,
1269                 const char *rvalue,
1270                 void *data,
1271                 void *userdata) {
1272
1273         _cleanup_strv_free_ char **names = NULL;
1274         char ***s = data;
1275         int r;
1276
1277         assert(filename);
1278         assert(lvalue);
1279         assert(rvalue);
1280         assert(data);
1281
1282         if (isempty(rvalue)) {
1283                 *s = strv_free(*s);
1284                 return 0;
1285         }
1286
1287         for (const char *p = rvalue;;) {
1288                 _cleanup_free_ char *word = NULL;
1289
1290                 r = extract_first_word(&p, &word, NULL, 0);
1291                 if (r == -ENOMEM)
1292                         return log_oom();
1293                 if (r < 0) {
1294                         log_syntax(unit, LOG_WARNING, filename, line, r,
1295                                    "Failed to extract interface name, ignoring assignment: %s",
1296                                    rvalue);
1297                         return 0;
1298                 }
1299                 if (r == 0)
1300                         break;
1301
1302                 if (!ifname_valid_full(word, ltype)) {
1303                         log_syntax(unit, LOG_WARNING, filename, line, 0,
1304                                    "Interface name is not valid or too long, ignoring assignment: %s",
1305                                    word);
1306                         continue;
1307                 }
1308
1309                 r = strv_consume(&names, TAKE_PTR(word));
1310                 if (r < 0)
1311                         return log_oom();
1312         }
1313
1314         r = strv_extend_strv(s, names, true);
1315         if (r < 0)
1316                 return log_oom();
1317
1318         return 0;
1319 }
1320
1321 int config_parse_ip_port(
1322                 const char *unit,
1323                 const char *filename,
1324                 unsigned line,
1325                 const char *section,
1326                 unsigned section_line,
1327                 const char *lvalue,
1328                 int ltype,
1329                 const char *rvalue,
1330                 void *data,
1331                 void *userdata) {
1332
1333         uint16_t *s = data;
1334         uint16_t port;
1335         int r;
1336
1337         assert(filename);
1338         assert(lvalue);
1339         assert(rvalue);
1340         assert(data);
1341
1342         if (isempty(rvalue)) {
1343                 *s = 0;
1344                 return 0;
1345         }
1346
1347         r = parse_ip_port(rvalue, &port);
1348         if (r < 0) {
1349                 log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse port '%s'.", rvalue);
1350                 return 0;
1351         }
1352
1353         *s = port;
1354
1355         return 0;
1356 }
1357
1358 int config_parse_mtu(
1359                 const char *unit,
1360                 const char *filename,
1361                 unsigned line,
1362                 const char *section,
1363                 unsigned section_line,
1364                 const char *lvalue,
1365                 int ltype,
1366                 const char *rvalue,
1367                 void *data,
1368                 void *userdata) {
1369
1370         uint32_t *mtu = data;
1371         int r;
1372
1373         assert(rvalue);
1374         assert(mtu);
1375
1376         r = parse_mtu(ltype, rvalue, mtu);
1377         if (r == -ERANGE) {
1378                 log_syntax(unit, LOG_WARNING, filename, line, r,
1379                            "Maximum transfer unit (MTU) value out of range. Permitted range is %" PRIu32 "…%" PRIu32 ", ignoring: %s",
1380                            (uint32_t) (ltype == AF_INET6 ? IPV6_MIN_MTU : IPV4_MIN_MTU), (uint32_t) UINT32_MAX,
1381                            rvalue);
1382                 return 0;
1383         }
1384         if (r < 0) {
1385                 log_syntax(unit, LOG_WARNING, filename, line, r,
1386                            "Failed to parse MTU value '%s', ignoring: %m", rvalue);
1387                 return 0;
1388         }
1389
1390         return 0;
1391 }
1392
1393 int config_parse_rlimit(
1394                 const char *unit,
1395                 const char *filename,
1396                 unsigned line,
1397                 const char *section,
1398                 unsigned section_line,
1399                 const char *lvalue,
1400                 int ltype,
1401                 const char *rvalue,
1402                 void *data,
1403                 void *userdata) {
1404
1405         struct rlimit **rl = data, d = {};
1406         int r;
1407
1408         assert(rvalue);
1409         assert(rl);
1410
1411         r = rlimit_parse(ltype, rvalue, &d);
1412         if (r == -EILSEQ) {
1413                 log_syntax(unit, LOG_WARNING, filename, line, r, "Soft resource limit chosen higher than hard limit, ignoring: %s", rvalue);
1414                 return 0;
1415         }
1416         if (r < 0) {
1417                 log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse resource value, ignoring: %s", rvalue);
1418                 return 0;
1419         }
1420
1421         if (rl[ltype])
1422                 *rl[ltype] = d;
1423         else {
1424                 rl[ltype] = newdup(struct rlimit, &d, 1);
1425                 if (!rl[ltype])
1426                         return log_oom();
1427         }
1428
1429         return 0;
1430 }
1431
1432 int config_parse_permille(
1433                 const char* unit,
1434                 const char *filename,
1435                 unsigned line,
1436                 const char *section,
1437                 unsigned section_line,
1438                 const char *lvalue,
1439                 int ltype,
1440                 const char *rvalue,
1441                 void *data,
1442                 void *userdata) {
1443
1444         unsigned *permille = data;
1445         int r;
1446
1447         assert(filename);
1448         assert(lvalue);
1449         assert(rvalue);
1450         assert(permille);
1451
1452         r = parse_permille(rvalue);
1453         if (r < 0) {
1454                 log_syntax(unit, LOG_WARNING, filename, line, r,
1455                            "Failed to parse permille value, ignoring: %s", rvalue);
1456                 return 0;
1457         }
1458
1459         *permille = (unsigned) r;
1460
1461         return 0;
1462 }
1463
1464 int config_parse_vlanprotocol(
1465                 const char* unit,
1466                 const char *filename,
1467                 unsigned line,
1468                 const char *section,
1469                 unsigned section_line,
1470                 const char *lvalue,
1471                 int ltype,
1472                 const char *rvalue,
1473                 void *data,
1474                 void *userdata) {
1475
1476         int *vlan_protocol = data;
1477
1478         assert(filename);
1479         assert(lvalue);
1480
1481         if (isempty(rvalue)) {
1482                 *vlan_protocol = -1;
1483                 return 0;
1484         }
1485
1486         if (STR_IN_SET(rvalue, "802.1ad", "802.1AD"))
1487                 *vlan_protocol = ETH_P_8021AD;
1488         else if (STR_IN_SET(rvalue, "802.1q", "802.1Q"))
1489                 *vlan_protocol = ETH_P_8021Q;
1490         else {
1491                 log_syntax(unit, LOG_WARNING, filename, line, 0,
1492                            "Failed to parse VLAN protocol value, ignoring: %s", rvalue);
1493                 return 0;
1494         }
1495
1496         return 0;
1497 }
1498
1499 int config_parse_hw_addr(
1500                 const char *unit,
1501                 const char *filename,
1502                 unsigned line,
1503                 const char *section,
1504                 unsigned section_line,
1505                 const char *lvalue,
1506                 int ltype,
1507                 const char *rvalue,
1508                 void *data,
1509                 void *userdata) {
1510
1511         struct hw_addr_data a, *hwaddr = data;
1512         int r;
1513
1514         assert(filename);
1515         assert(lvalue);
1516         assert(rvalue);
1517         assert(data);
1518
1519         if (isempty(rvalue)) {
1520                 *hwaddr = HW_ADDR_NULL;
1521                 return 0;
1522         }
1523
1524         r = parse_hw_addr_full(rvalue, ltype, &a);
1525         if (r < 0) {
1526                 log_syntax(unit, LOG_WARNING, filename, line, r,
1527                            "Not a valid hardware address, ignoring assignment: %s", rvalue);
1528                 return 0;
1529         }
1530
1531         *hwaddr = a;
1532         return 0;
1533 }
1534
1535 int config_parse_hw_addrs(
1536                 const char *unit,
1537                 const char *filename,
1538                 unsigned line,
1539                 const char *section,
1540                 unsigned section_line,
1541                 const char *lvalue,
1542                 int ltype,
1543                 const char *rvalue,
1544                 void *data,
1545                 void *userdata) {
1546
1547         Set **hwaddrs = data;
1548         int r;
1549
1550         assert(filename);
1551         assert(lvalue);
1552         assert(rvalue);
1553         assert(data);
1554
1555         if (isempty(rvalue)) {
1556                 /* Empty assignment resets the list */
1557                 *hwaddrs = set_free(*hwaddrs);
1558                 return 0;
1559         }
1560
1561         for (const char *p = rvalue;;) {
1562                 _cleanup_free_ char *word = NULL;
1563                 _cleanup_free_ struct hw_addr_data *n = NULL;
1564
1565                 r = extract_first_word(&p, &word, NULL, 0);
1566                 if (r == 0)
1567                         return 0;
1568                 if (r == -ENOMEM)
1569                         return log_oom();
1570                 if (r < 0) {
1571                         log_syntax(unit, LOG_WARNING, filename, line, r,
1572                                    "Invalid syntax, ignoring: %s", rvalue);
1573                         return 0;
1574                 }
1575
1576                 n = new(struct hw_addr_data, 1);
1577                 if (!n)
1578                         return log_oom();
1579
1580                 r = parse_hw_addr_full(word, ltype, n);
1581                 if (r < 0) {
1582                         log_syntax(unit, LOG_WARNING, filename, line, r,
1583                                    "Not a valid hardware address, ignoring: %s", word);
1584                         continue;
1585                 }
1586
1587                 r = set_ensure_consume(hwaddrs, &hw_addr_hash_ops_free, TAKE_PTR(n));
1588                 if (r < 0)
1589                         return log_oom();
1590         }
1591 }
1592
1593 int config_parse_ether_addr(
1594                 const char *unit,
1595                 const char *filename,
1596                 unsigned line,
1597                 const char *section,
1598                 unsigned section_line,
1599                 const char *lvalue,
1600                 int ltype,
1601                 const char *rvalue,
1602                 void *data,
1603                 void *userdata) {
1604
1605         _cleanup_free_ struct ether_addr *n = NULL;
1606         struct ether_addr **hwaddr = data;
1607         int r;
1608
1609         assert(filename);
1610         assert(lvalue);
1611         assert(rvalue);
1612         assert(data);
1613
1614         if (isempty(rvalue)) {
1615                 *hwaddr = mfree(*hwaddr);
1616                 return 0;
1617         }
1618
1619         n = new0(struct ether_addr, 1);
1620         if (!n)
1621                 return log_oom();
1622
1623         r = parse_ether_addr(rvalue, n);
1624         if (r < 0) {
1625                 log_syntax(unit, LOG_WARNING, filename, line, r,
1626                            "Not a valid MAC address, ignoring assignment: %s", rvalue);
1627                 return 0;
1628         }
1629
1630         free_and_replace(*hwaddr, n);
1631
1632         return 0;
1633 }
1634
1635 int config_parse_ether_addrs(
1636                 const char *unit,
1637                 const char *filename,
1638                 unsigned line,
1639                 const char *section,
1640                 unsigned section_line,
1641                 const char *lvalue,
1642                 int ltype,
1643                 const char *rvalue,
1644                 void *data,
1645                 void *userdata) {
1646
1647         Set **hwaddrs = data;
1648         int r;
1649
1650         assert(filename);
1651         assert(lvalue);
1652         assert(rvalue);
1653         assert(data);
1654
1655         if (isempty(rvalue)) {
1656                 /* Empty assignment resets the list */
1657                 *hwaddrs = set_free(*hwaddrs);
1658                 return 0;
1659         }
1660
1661         for (const char *p = rvalue;;) {
1662                 _cleanup_free_ char *word = NULL;
1663                 _cleanup_free_ struct ether_addr *n = NULL;
1664
1665                 r = extract_first_word(&p, &word, NULL, 0);
1666                 if (r == 0)
1667                         return 0;
1668                 if (r == -ENOMEM)
1669                         return log_oom();
1670                 if (r < 0) {
1671                         log_syntax(unit, LOG_WARNING, filename, line, r,
1672                                    "Invalid syntax, ignoring: %s", rvalue);
1673                         return 0;
1674                 }
1675
1676                 n = new(struct ether_addr, 1);
1677                 if (!n)
1678                         return log_oom();
1679
1680                 r = parse_ether_addr(word, n);
1681                 if (r < 0) {
1682                         log_syntax(unit, LOG_WARNING, filename, line, r,
1683                                    "Not a valid MAC address, ignoring: %s", word);
1684                         continue;
1685                 }
1686
1687                 r = set_ensure_consume(hwaddrs, &ether_addr_hash_ops_free, TAKE_PTR(n));
1688                 if (r < 0)
1689                         return log_oom();
1690         }
1691 }
1692
1693 int config_parse_in_addr_non_null(
1694                 const char *unit,
1695                 const char *filename,
1696                 unsigned line,
1697                 const char *section,
1698                 unsigned section_line,
1699                 const char *lvalue,
1700                 int ltype,
1701                 const char *rvalue,
1702                 void *data,
1703                 void *userdata) {
1704
1705         /* data must be a pointer to struct in_addr or in6_addr, and the type is determined by ltype. */
1706         struct in_addr *ipv4 = data;
1707         struct in6_addr *ipv6 = data;
1708         union in_addr_union a;
1709         int r;
1710
1711         assert(filename);
1712         assert(lvalue);
1713         assert(rvalue);
1714         assert(data);
1715         assert(IN_SET(ltype, AF_INET, AF_INET6));
1716
1717         if (isempty(rvalue)) {
1718                 if (ltype == AF_INET)
1719                         *ipv4 = (struct in_addr) {};
1720                 else
1721                         *ipv6 = (struct in6_addr) {};
1722                 return 0;
1723         }
1724
1725         r = in_addr_from_string(ltype, rvalue, &a);
1726         if (r < 0) {
1727                 log_syntax(unit, LOG_WARNING, filename, line, r,
1728                            "Failed to parse %s=, ignoring assignment: %s", lvalue, rvalue);
1729                 return 0;
1730         }
1731
1732         if (!in_addr_is_set(ltype, &a)) {
1733                 log_syntax(unit, LOG_WARNING, filename, line, 0,
1734                            "%s= cannot be the ANY address, ignoring: %s", lvalue, rvalue);
1735                 return 0;
1736         }
1737
1738         if (ltype == AF_INET)
1739                 *ipv4 = a.in;
1740         else
1741                 *ipv6 = a.in6;
1742         return 0;
1743 }
1744
1745 DEFINE_CONFIG_PARSE(config_parse_percent, parse_percent, "Failed to parse percent value");
1746 DEFINE_CONFIG_PARSE(config_parse_permyriad, parse_permyriad, "Failed to parse permyriad value");