src/network/networkd-routing-policy-rule.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <net/if.h>
   4 #include <linux/fib_rules.h>
   5
   6 #include "alloc-util.h"
   7 #include "conf-parser.h"
   8 #include "fileio.h"
   9 #include "networkd-routing-policy-rule.h"
  10 #include "netlink-util.h"
  11 #include "networkd-manager.h"
  12 #include "parse-util.h"
  13 #include "socket-util.h"
  14 #include "string-util.h"
  15 #include "strv.h"
  16
  17 int routing_policy_rule_new(RoutingPolicyRule **ret) {
  18         RoutingPolicyRule *rule;
  19
  20         rule = new(RoutingPolicyRule, 1);
  21         if (!rule)
  22                 return -ENOMEM;
  23
  24         *rule = (RoutingPolicyRule) {
  25                 .family = AF_INET,
  26                 .table = RT_TABLE_MAIN,
  27         };
  28
  29         *ret = rule;
  30         return 0;
  31 }
  32
  33 void routing_policy_rule_free(RoutingPolicyRule *rule) {
  34
  35         if (!rule)
  36                 return;
  37
  38         if (rule->network) {
  39                 LIST_REMOVE(rules, rule->network->rules, rule);
  40                 assert(rule->network->n_rules > 0);
  41                 rule->network->n_rules--;
  42
  43                 if (rule->section) {
  44                         hashmap_remove(rule->network->rules_by_section, rule->section);
  45                         network_config_section_free(rule->section);
  46                 }
  47
  48         }
  49
  50         if (rule->manager) {
  51                 set_remove(rule->manager->rules, rule);
  52                 set_remove(rule->manager->rules_foreign, rule);
  53         }
  54
  55         free(rule->iif);
  56         free(rule->oif);
  57         free(rule);
  58 }
  59
  60 static void routing_policy_rule_hash_func(const void *b, struct siphash *state) {
  61         const RoutingPolicyRule *rule = b;
  62
  63         assert(rule);
  64
  65         siphash24_compress(&rule->family, sizeof(rule->family), state);
  66
  67         switch (rule->family) {
  68         case AF_INET:
  69         case AF_INET6:
  70
  71                 siphash24_compress(&rule->from, FAMILY_ADDRESS_SIZE(rule->family), state);
  72                 siphash24_compress(&rule->from_prefixlen, sizeof(rule->from_prefixlen), state);
  73
  74                 siphash24_compress(&rule->to, FAMILY_ADDRESS_SIZE(rule->family), state);
  75                 siphash24_compress(&rule->to_prefixlen, sizeof(rule->to_prefixlen), state);
  76
  77                 siphash24_compress(&rule->tos, sizeof(rule->tos), state);
  78                 siphash24_compress(&rule->fwmark, sizeof(rule->fwmark), state);
  79                 siphash24_compress(&rule->table, sizeof(rule->table), state);
  80
  81                 if (rule->iif)
  82                         siphash24_compress(&rule->iif, strlen(rule->iif), state);
  83
  84                 if (rule->oif)
  85                         siphash24_compress(&rule->oif, strlen(rule->oif), state);
  86
  87                 break;
  88         default:
  89                 /* treat any other address family as AF_UNSPEC */
  90                 break;
  91         }
  92 }
  93
  94 static int routing_policy_rule_compare_func(const void *_a, const void *_b) {
  95         const RoutingPolicyRule *a = _a, *b = _b;
  96         int r;
  97
  98         r = CMP(a->family, b->family);
  99         if (r != 0)
 100                 return r;
 101
 102         switch (a->family) {
 103         case AF_INET:
 104         case AF_INET6:
 105                 r = CMP(a->from_prefixlen, b->from_prefixlen);
 106                 if (r != 0)
 107                         return r;
 108
 109                 r = CMP(a->to_prefixlen, b->to_prefixlen);
 110                 if (r != 0)
 111                         return r;
 112
 113                 r = CMP(a->tos, b->tos);
 114                 if (r != 0)
 115                         return r;
 116
 117                 r = CMP(a->fwmask, b->fwmask);
 118                 if (r != 0)
 119                         return r;
 120
 121                 r = CMP(a->table, b->table);
 122                 if (r != 0)
 123                         return r;
 124
 125                 r = strcmp_ptr(a->iif, b->iif);
 126                 if (!r)
 127                         return r;
 128
 129                 r = strcmp_ptr(a->oif, b->oif);
 130                 if (!r)
 131                         return r;
 132
 133                 r = memcmp(&a->from, &b->from, FAMILY_ADDRESS_SIZE(a->family));
 134                 if (r != 0)
 135                         return r;
 136
 137                 return memcmp(&a->to, &b->to, FAMILY_ADDRESS_SIZE(a->family));
 138
 139         default:
 140                 /* treat any other address family as AF_UNSPEC */
 141                 return 0;
 142         }
 143 }
 144
 145 const struct hash_ops routing_policy_rule_hash_ops = {
 146         .hash = routing_policy_rule_hash_func,
 147         .compare = routing_policy_rule_compare_func
 148 };
 149
 150 int routing_policy_rule_get(Manager *m,
 151                             int family,
 152                             const union in_addr_union *from,
 153                             uint8_t from_prefixlen,
 154                             const union in_addr_union *to,
 155                             uint8_t to_prefixlen,
 156                             uint8_t tos,
 157                             uint32_t fwmark,
 158                             uint32_t table,
 159                             const char *iif,
 160                             const char *oif,
 161                             RoutingPolicyRule **ret) {
 162
 163         RoutingPolicyRule rule, *existing;
 164
 165         assert_return(m, -1);
 166
 167         rule = (RoutingPolicyRule) {
 168                 .family = family,
 169                 .from = *from,
 170                 .from_prefixlen = from_prefixlen,
 171                 .to = *to,
 172                 .to_prefixlen = to_prefixlen,
 173                 .tos = tos,
 174                 .fwmark = fwmark,
 175                 .table = table,
 176                 .iif = (char*) iif,
 177                 .oif = (char*) oif
 178         };
 179
 180         existing = set_get(m->rules, &rule);
 181         if (existing) {
 182                 if (ret)
 183                         *ret = existing;
 184                 return 1;
 185         }
 186
 187         existing = set_get(m->rules_foreign, &rule);
 188         if (existing) {
 189                 if (ret)
 190                         *ret = existing;
 191                 return 1;
 192         }
 193
 194         return -ENOENT;
 195 }
 196
 197 int routing_policy_rule_make_local(Manager *m, RoutingPolicyRule *rule) {
 198         int r;
 199
 200         assert(m);
 201
 202         if (set_contains(m->rules_foreign, rule)) {
 203                 set_remove(m->rules_foreign, rule);
 204
 205                 r = set_ensure_allocated(&m->rules, &routing_policy_rule_hash_ops);
 206                 if (r < 0)
 207                         return r;
 208
 209                 return set_put(m->rules, rule);
 210         }
 211
 212         return -ENOENT;
 213 }
 214
 215 static int routing_policy_rule_add_internal(Manager *m,
 216                                             Set **rules,
 217                                             int family,
 218                                             const union in_addr_union *from,
 219                                             uint8_t from_prefixlen,
 220                                             const union in_addr_union *to,
 221                                             uint8_t to_prefixlen,
 222                                             uint8_t tos,
 223                                             uint32_t fwmark,
 224                                             uint32_t table,
 225                                             const char *_iif,
 226                                             const char *_oif,
 227                                             RoutingPolicyRule **ret) {
 228
 229         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *rule = NULL;
 230         _cleanup_free_ char *iif = NULL, *oif = NULL;
 231         int r;
 232
 233         assert_return(rules, -EINVAL);
 234
 235         if (_iif) {
 236                 iif = strdup(_iif);
 237                 if (!iif)
 238                         return -ENOMEM;
 239         }
 240
 241         if (_oif) {
 242                 oif = strdup(_oif);
 243                 if (!oif)
 244                         return -ENOMEM;
 245         }
 246
 247         r = routing_policy_rule_new(&rule);
 248         if (r < 0)
 249                 return r;
 250
 251         rule->manager = m;
 252         rule->family = family;
 253         rule->from = *from;
 254         rule->from_prefixlen = from_prefixlen;
 255         rule->to = *to;
 256         rule->to_prefixlen = to_prefixlen;
 257         rule->tos = tos;
 258         rule->fwmark = fwmark;
 259         rule->table = table;
 260         rule->iif = TAKE_PTR(iif);
 261         rule->oif = TAKE_PTR(oif);
 262
 263         r = set_ensure_allocated(rules, &routing_policy_rule_hash_ops);
 264         if (r < 0)
 265                 return r;
 266
 267         r = set_put(*rules, rule);
 268         if (r < 0)
 269                 return r;
 270
 271         if (ret)
 272                 *ret = rule;
 273
 274         rule = NULL;
 275
 276         return 0;
 277 }
 278
 279 int routing_policy_rule_add(Manager *m,
 280                             int family,
 281                             const union in_addr_union *from,
 282                             uint8_t from_prefixlen,
 283                             const union in_addr_union *to,
 284                             uint8_t to_prefixlen,
 285                             uint8_t tos,
 286                             uint32_t fwmark,
 287                             uint32_t table,
 288                             const char *iif,
 289                             const char *oif,
 290                             RoutingPolicyRule **ret) {
 291
 292         return routing_policy_rule_add_internal(m, &m->rules, family, from, from_prefixlen, to, to_prefixlen, tos, fwmark, table, iif, oif, ret);
 293 }
 294
 295 int routing_policy_rule_add_foreign(Manager *m,
 296                                     int family,
 297                                     const union in_addr_union *from,
 298                                     uint8_t from_prefixlen,
 299                                     const union in_addr_union *to,
 300                                     uint8_t to_prefixlen,
 301                                     uint8_t tos,
 302                                     uint32_t fwmark,
 303                                     uint32_t table,
 304                                     const char *iif,
 305                                     const char *oif,
 306                                     RoutingPolicyRule **ret) {
 307         return routing_policy_rule_add_internal(m, &m->rules_foreign, family, from, from_prefixlen, to, to_prefixlen, tos, fwmark, table, iif, oif, ret);
 308 }
 309
 310 static int routing_policy_rule_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
 311         _cleanup_(link_unrefp) Link *link = userdata;
 312         int r;
 313
 314         assert(m);
 315         assert(link);
 316         assert(link->ifname);
 317
 318         link->routing_policy_rule_remove_messages--;
 319
 320         if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
 321                 return 1;
 322
 323         r = sd_netlink_message_get_errno(m);
 324         if (r < 0)
 325                 log_link_warning_errno(link, r, "Could not drop routing policy rule: %m");
 326
 327         return 1;
 328 }
 329
 330 int routing_policy_rule_remove(RoutingPolicyRule *routing_policy_rule, Link *link, sd_netlink_message_handler_t callback) {
 331         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
 332         int r;
 333
 334         assert(routing_policy_rule);
 335         assert(link);
 336         assert(link->manager);
 337         assert(link->manager->rtnl);
 338         assert(link->ifindex > 0);
 339         assert(IN_SET(routing_policy_rule->family, AF_INET, AF_INET6));
 340
 341         r = sd_rtnl_message_new_routing_policy_rule(link->manager->rtnl, &m, RTM_DELRULE, routing_policy_rule->family);
 342         if (r < 0)
 343                 return log_error_errno(r, "Could not allocate RTM_DELRULE message: %m");
 344
 345         if (!in_addr_is_null(routing_policy_rule->family, &routing_policy_rule->from)) {
 346                 if (routing_policy_rule->family == AF_INET)
 347                         r = sd_netlink_message_append_in_addr(m, FRA_SRC, &routing_policy_rule->from.in);
 348                 else
 349                         r = sd_netlink_message_append_in6_addr(m, FRA_SRC, &routing_policy_rule->from.in6);
 350
 351                 if (r < 0)
 352                         return log_error_errno(r, "Could not append FRA_SRC attribute: %m");
 353
 354                 r = sd_rtnl_message_routing_policy_rule_set_rtm_src_prefixlen(m, routing_policy_rule->from_prefixlen);
 355                 if (r < 0)
 356                         return log_error_errno(r, "Could not set source prefix length: %m");
 357         }
 358
 359         if (!in_addr_is_null(routing_policy_rule->family, &routing_policy_rule->to)) {
 360                 if (routing_policy_rule->family == AF_INET)
 361                         r = sd_netlink_message_append_in_addr(m, FRA_DST, &routing_policy_rule->to.in);
 362                 else
 363                         r = sd_netlink_message_append_in6_addr(m, FRA_DST, &routing_policy_rule->to.in6);
 364
 365                 if (r < 0)
 366                         return log_error_errno(r, "Could not append FRA_DST attribute: %m");
 367
 368                 r = sd_rtnl_message_routing_policy_rule_set_rtm_dst_prefixlen(m, routing_policy_rule->to_prefixlen);
 369                 if (r < 0)
 370                         return log_error_errno(r, "Could not set destination prefix length: %m");
 371         }
 372
 373         r = sd_netlink_call_async(link->manager->rtnl, m, callback, link, 0, NULL);
 374         if (r < 0)
 375                 return log_error_errno(r, "Could not send rtnetlink message: %m");
 376
 377         link_ref(link);
 378
 379         return 0;
 380 }
 381
 382 static int routing_policy_rule_new_static(Network *network, const char *filename, unsigned section_line, RoutingPolicyRule **ret) {
 383         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *rule = NULL;
 384         _cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL;
 385         int r;
 386
 387         assert(network);
 388         assert(ret);
 389         assert(!!filename == (section_line > 0));
 390
 391         r = network_config_section_new(filename, section_line, &n);
 392         if (r < 0)
 393                 return r;
 394
 395         rule = hashmap_get(network->rules_by_section, n);
 396         if (rule) {
 397                 *ret = TAKE_PTR(rule);
 398
 399                 return 0;
 400         }
 401
 402         r = routing_policy_rule_new(&rule);
 403         if (r < 0)
 404                 return r;
 405
 406         rule->section = TAKE_PTR(n);
 407         rule->network = network;
 408
 409         r = hashmap_put(network->rules_by_section, rule->section, rule);
 410         if (r < 0)
 411                 return r;
 412
 413         LIST_APPEND(rules, network->rules, rule);
 414         network->n_rules++;
 415
 416         *ret = TAKE_PTR(rule);
 417
 418         return 0;
 419 }
 420
 421 int link_routing_policy_rule_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
 422         _cleanup_(link_unrefp) Link *link = userdata;
 423         int r;
 424
 425         assert(rtnl);
 426         assert(m);
 427         assert(link);
 428         assert(link->ifname);
 429         assert(link->routing_policy_rule_messages > 0);
 430
 431         link->routing_policy_rule_messages--;
 432
 433         if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
 434                 return 1;
 435
 436         r = sd_netlink_message_get_errno(m);
 437         if (r < 0 && r != -EEXIST)
 438                 log_link_warning_errno(link, r, "Could not add routing policy rule: %m");
 439
 440         if (link->routing_policy_rule_messages == 0) {
 441                 log_link_debug(link, "Routing policy rule configured");
 442                 link->routing_policy_rules_configured = true;
 443                 link_check_ready(link);
 444         }
 445
 446         return 1;
 447 }
 448
 449 int routing_policy_rule_configure(RoutingPolicyRule *rule, Link *link, sd_netlink_message_handler_t callback, bool update) {
 450         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
 451         int r;
 452
 453         assert(rule);
 454         assert(link);
 455         assert(link->ifindex > 0);
 456         assert(link->manager);
 457         assert(link->manager->rtnl);
 458
 459         r = sd_rtnl_message_new_routing_policy_rule(link->manager->rtnl, &m, RTM_NEWRULE, rule->family);
 460         if (r < 0)
 461                 return log_error_errno(r, "Could not allocate RTM_NEWRULE message: %m");
 462
 463         if (!in_addr_is_null(rule->family, &rule->from)) {
 464                 if (rule->family == AF_INET)
 465                         r = sd_netlink_message_append_in_addr(m, FRA_SRC, &rule->from.in);
 466                 else
 467                         r = sd_netlink_message_append_in6_addr(m, FRA_SRC, &rule->from.in6);
 468
 469                 if (r < 0)
 470                         return log_error_errno(r, "Could not append FRA_SRC attribute: %m");
 471
 472                 r = sd_rtnl_message_routing_policy_rule_set_rtm_src_prefixlen(m, rule->from_prefixlen);
 473                 if (r < 0)
 474                         return log_error_errno(r, "Could not set source prefix length: %m");
 475         }
 476
 477         if (!in_addr_is_null(rule->family, &rule->to)) {
 478                 if (rule->family == AF_INET)
 479                         r = sd_netlink_message_append_in_addr(m, FRA_DST, &rule->to.in);
 480                 else
 481                         r = sd_netlink_message_append_in6_addr(m, FRA_DST, &rule->to.in6);
 482
 483                 if (r < 0)
 484                         return log_error_errno(r, "Could not append FRA_DST attribute: %m");
 485
 486                 r = sd_rtnl_message_routing_policy_rule_set_rtm_dst_prefixlen(m, rule->to_prefixlen);
 487                 if (r < 0)
 488                         return log_error_errno(r, "Could not set destination prefix length: %m");
 489         }
 490
 491         r = sd_netlink_message_append_u32(m, FRA_PRIORITY, rule->priority);
 492         if (r < 0)
 493                 return log_error_errno(r, "Could not append FRA_PRIORITY attribute: %m");
 494
 495         if (rule->tos > 0) {
 496                 r = sd_rtnl_message_routing_policy_rule_set_tos(m, rule->tos);
 497                 if (r < 0)
 498                         return log_error_errno(r, "Could not set ip rule tos: %m");
 499         }
 500
 501         if (rule->table < 256) {
 502                 r = sd_rtnl_message_routing_policy_rule_set_table(m, rule->table);
 503                 if (r < 0)
 504                         return log_error_errno(r, "Could not set ip rule table: %m");
 505         } else {
 506                 r = sd_rtnl_message_routing_policy_rule_set_table(m, RT_TABLE_UNSPEC);
 507                 if (r < 0)
 508                         return log_error_errno(r, "Could not set ip rule table: %m");
 509
 510                 r = sd_netlink_message_append_u32(m, FRA_TABLE, rule->table);
 511                 if (r < 0)
 512                         return log_error_errno(r, "Could not append FRA_TABLE attribute: %m");
 513         }
 514
 515         if (rule->fwmark > 0) {
 516                 r = sd_netlink_message_append_u32(m, FRA_FWMARK, rule->fwmark);
 517                 if (r < 0)
 518                         return log_error_errno(r, "Could not append FRA_FWMARK attribute: %m");
 519         }
 520
 521         if (rule->fwmask > 0) {
 522                 r = sd_netlink_message_append_u32(m, FRA_FWMASK, rule->fwmask);
 523                 if (r < 0)
 524                         return log_error_errno(r, "Could not append FRA_FWMASK attribute: %m");
 525         }
 526
 527         if (rule->iif) {
 528                 r = sd_netlink_message_append_string(m, FRA_IFNAME, rule->iif);
 529                 if (r < 0)
 530                         return log_error_errno(r, "Could not append FRA_IFNAME attribute: %m");
 531         }
 532
 533         if (rule->oif) {
 534                 r = sd_netlink_message_append_string(m, FRA_OIFNAME, rule->oif);
 535                 if (r < 0)
 536                         return log_error_errno(r, "Could not append FRA_OIFNAME attribute: %m");
 537         }
 538
 539         rule->link = link;
 540
 541         r = sd_netlink_call_async(link->manager->rtnl, m, callback, link, 0, NULL);
 542         if (r < 0)
 543                 return log_error_errno(r, "Could not send rtnetlink message: %m");
 544
 545         link_ref(link);
 546
 547         r = routing_policy_rule_add(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
 548                                     rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif, NULL);
 549         if (r < 0)
 550                 return log_error_errno(r, "Could not add rule : %m");
 551
 552         return 0;
 553 }
 554
 555 static int parse_fwmark_fwmask(const char *s, uint32_t *fwmark, uint32_t *fwmask) {
 556         _cleanup_free_ char *f = NULL;
 557         char *p;
 558         int r;
 559
 560         assert(s);
 561
 562         f = strdup(s);
 563         if (!f)
 564                 return -ENOMEM;
 565
 566         p = strchr(f, '/');
 567         if (p)
 568                 *p++ = '\0';
 569
 570         r = safe_atou32(f, fwmark);
 571         if (r < 0)
 572                 return log_error_errno(r, "Failed to parse RPDB rule firewall mark, ignoring: %s", f);
 573
 574         if (p) {
 575                 r = safe_atou32(p, fwmask);
 576                 if (r < 0)
 577                         return log_error_errno(r, "Failed to parse RPDB rule mask, ignoring: %s", f);
 578         }
 579
 580         return 0;
 581 }
 582
 583 int config_parse_routing_policy_rule_tos(
 584                 const char *unit,
 585                 const char *filename,
 586                 unsigned line,
 587                 const char *section,
 588                 unsigned section_line,
 589                 const char *lvalue,
 590                 int ltype,
 591                 const char *rvalue,
 592                 void *data,
 593                 void *userdata) {
 594
 595         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *n = NULL;
 596         Network *network = userdata;
 597         int r;
 598
 599         assert(filename);
 600         assert(section);
 601         assert(lvalue);
 602         assert(rvalue);
 603         assert(data);
 604
 605         r = routing_policy_rule_new_static(network, filename, section_line, &n);
 606         if (r < 0)
 607                 return r;
 608
 609         r = safe_atou8(rvalue, &n->tos);
 610         if (r < 0) {
 611                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse RPDB rule tos, ignoring: %s", rvalue);
 612                 return 0;
 613         }
 614
 615         n = NULL;
 616
 617         return 0;
 618 }
 619
 620 int config_parse_routing_policy_rule_priority(
 621                 const char *unit,
 622                 const char *filename,
 623                 unsigned line,
 624                 const char *section,
 625                 unsigned section_line,
 626                 const char *lvalue,
 627                 int ltype,
 628                 const char *rvalue,
 629                 void *data,
 630                 void *userdata) {
 631
 632         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *n = NULL;
 633         Network *network = userdata;
 634         int r;
 635
 636         assert(filename);
 637         assert(section);
 638         assert(lvalue);
 639         assert(rvalue);
 640         assert(data);
 641
 642         r = routing_policy_rule_new_static(network, filename, section_line, &n);
 643         if (r < 0)
 644                 return r;
 645
 646         r = safe_atou32(rvalue, &n->priority);
 647         if (r < 0) {
 648                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse RPDB rule priority, ignoring: %s", rvalue);
 649                 return 0;
 650         }
 651
 652         n = NULL;
 653
 654         return 0;
 655 }
 656
 657 int config_parse_routing_policy_rule_table(
 658                 const char *unit,
 659                 const char *filename,
 660                 unsigned line,
 661                 const char *section,
 662                 unsigned section_line,
 663                 const char *lvalue,
 664                 int ltype,
 665                 const char *rvalue,
 666                 void *data,
 667                 void *userdata) {
 668
 669         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *n = NULL;
 670         Network *network = userdata;
 671         int r;
 672
 673         assert(filename);
 674         assert(section);
 675         assert(lvalue);
 676         assert(rvalue);
 677         assert(data);
 678
 679         r = routing_policy_rule_new_static(network, filename, section_line, &n);
 680         if (r < 0)
 681                 return r;
 682
 683         r = safe_atou32(rvalue, &n->table);
 684         if (r < 0) {
 685                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse RPDB rule table, ignoring: %s", rvalue);
 686                 return 0;
 687         }
 688
 689         n = NULL;
 690
 691         return 0;
 692 }
 693
 694 int config_parse_routing_policy_rule_fwmark_mask(
 695                 const char *unit,
 696                 const char *filename,
 697                 unsigned line,
 698                 const char *section,
 699                 unsigned section_line,
 700                 const char *lvalue,
 701                 int ltype,
 702                 const char *rvalue,
 703                 void *data,
 704                 void *userdata) {
 705
 706         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *n = NULL;
 707         Network *network = userdata;
 708         int r;
 709
 710         assert(filename);
 711         assert(section);
 712         assert(lvalue);
 713         assert(rvalue);
 714         assert(data);
 715
 716         r = routing_policy_rule_new_static(network, filename, section_line, &n);
 717         if (r < 0)
 718                 return r;
 719
 720         r = parse_fwmark_fwmask(rvalue, &n->fwmark, &n->fwmask);
 721         if (r < 0) {
 722                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse RPDB rule firewall mark or mask, ignoring: %s", rvalue);
 723                 return 0;
 724         }
 725
 726         n = NULL;
 727
 728         return 0;
 729 }
 730
 731 int config_parse_routing_policy_rule_prefix(
 732                 const char *unit,
 733                 const char *filename,
 734                 unsigned line,
 735                 const char *section,
 736                 unsigned section_line,
 737                 const char *lvalue,
 738                 int ltype,
 739                 const char *rvalue,
 740                 void *data,
 741                 void *userdata) {
 742
 743         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *n = NULL;
 744         Network *network = userdata;
 745         union in_addr_union buffer;
 746         uint8_t prefixlen;
 747         int r;
 748
 749         assert(filename);
 750         assert(section);
 751         assert(lvalue);
 752         assert(rvalue);
 753         assert(data);
 754
 755         r = routing_policy_rule_new_static(network, filename, section_line, &n);
 756         if (r < 0)
 757                 return r;
 758
 759         r = in_addr_prefix_from_string(rvalue, AF_INET, &buffer, &prefixlen);
 760         if (r < 0) {
 761                 r = in_addr_prefix_from_string(rvalue, AF_INET6, &buffer, &prefixlen);
 762                 if (r < 0) {
 763                         log_syntax(unit, LOG_ERR, filename, line, r, "RPDB rule prefix is invalid, ignoring assignment: %s", rvalue);
 764                         return 0;
 765                 }
 766
 767                 n->family = AF_INET6;
 768         } else
 769                 n->family = AF_INET;
 770
 771         if (streq(lvalue, "To")) {
 772                 n->to = buffer;
 773                 n->to_prefixlen = prefixlen;
 774         } else {
 775                 n->from = buffer;
 776                 n->from_prefixlen = prefixlen;
 777         }
 778
 779         n = NULL;
 780
 781         return 0;
 782 }
 783
 784 int config_parse_routing_policy_rule_device(
 785                 const char *unit,
 786                 const char *filename,
 787                 unsigned line,
 788                 const char *section,
 789                 unsigned section_line,
 790                 const char *lvalue,
 791                 int ltype,
 792                 const char *rvalue,
 793                 void *data,
 794                 void *userdata) {
 795
 796         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *n = NULL;
 797         Network *network = userdata;
 798         int r;
 799
 800         assert(filename);
 801         assert(section);
 802         assert(lvalue);
 803         assert(rvalue);
 804         assert(data);
 805
 806         r = routing_policy_rule_new_static(network, filename, section_line, &n);
 807         if (r < 0)
 808                 return r;
 809
 810         if (!ifname_valid(rvalue)) {
 811                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse '%s' interface name, ignoring: %s", lvalue, rvalue);
 812                 return 0;
 813         }
 814
 815         if (streq(lvalue, "IncomingInterface")) {
 816                 r = free_and_strdup(&n->iif, rvalue);
 817                 if (r < 0)
 818                         return log_oom();
 819         } else {
 820                 r = free_and_strdup(&n->oif, rvalue);
 821                 if (r < 0)
 822                         return log_oom();
 823         }
 824
 825         n = NULL;
 826
 827         return 0;
 828 }
 829
 830 static int routing_policy_rule_read_full_file(const char *state_file, char **ret) {
 831         _cleanup_free_ char *s = NULL;
 832         size_t size;
 833         int r;
 834
 835         assert(state_file);
 836
 837         r = read_full_file(state_file, &s, &size);
 838         if (r == -ENOENT)
 839                 return -ENODATA;
 840         if (r < 0)
 841                 return r;
 842         if (size <= 0)
 843                 return -ENODATA;
 844
 845         *ret = TAKE_PTR(s);
 846
 847         return size;
 848 }
 849
 850 int routing_policy_serialize_rules(Set *rules, FILE *f) {
 851         RoutingPolicyRule *rule = NULL;
 852         Iterator i;
 853         int r;
 854
 855         assert(f);
 856
 857         SET_FOREACH(rule, rules, i) {
 858                 _cleanup_free_ char *from_str = NULL, *to_str = NULL;
 859                 bool space = false;
 860
 861                 fputs("RULE=", f);
 862
 863                 if (!in_addr_is_null(rule->family, &rule->from)) {
 864                         r = in_addr_to_string(rule->family, &rule->from, &from_str);
 865                         if (r < 0)
 866                                 return r;
 867
 868                         fprintf(f, "from=%s/%hhu",
 869                                 from_str, rule->from_prefixlen);
 870                         space = true;
 871                 }
 872
 873                 if (!in_addr_is_null(rule->family, &rule->to)) {
 874                         r = in_addr_to_string(rule->family, &rule->to, &to_str);
 875                         if (r < 0)
 876                                 return r;
 877
 878                         fprintf(f, "%sto=%s/%hhu",
 879                                 space ? " " : "",
 880                                 to_str, rule->to_prefixlen);
 881                         space = true;
 882                 }
 883
 884                 if (rule->tos != 0) {
 885                         fprintf(f, "%stos=%hhu",
 886                                 space ? " " : "",
 887                                 rule->tos);
 888                         space = true;
 889                 }
 890
 891                 if (rule->fwmark != 0) {
 892                         fprintf(f, "%sfwmark=%"PRIu32"/%"PRIu32,
 893                                 space ? " " : "",
 894                                 rule->fwmark, rule->fwmask);
 895                         space = true;
 896                 }
 897
 898                 if (rule->iif) {
 899                         fprintf(f, "%siif=%s",
 900                                 space ? " " : "",
 901                                 rule->iif);
 902                         space = true;
 903                 }
 904
 905                 if (rule->oif) {
 906                         fprintf(f, "%soif=%s",
 907                                 space ? " " : "",
 908                                 rule->oif);
 909                         space = true;
 910                 }
 911
 912                 fprintf(f, "%stable=%"PRIu32 "\n",
 913                         space ? " " : "",
 914                         rule->table);
 915         }
 916
 917         return 0;
 918 }
 919
 920 int routing_policy_load_rules(const char *state_file, Set **rules) {
 921         _cleanup_strv_free_ char **l = NULL;
 922         _cleanup_free_ char *data = NULL;
 923         const char *p;
 924         char **i;
 925         int r;
 926
 927         assert(state_file);
 928         assert(rules);
 929
 930         r = routing_policy_rule_read_full_file(state_file, &data);
 931         if (r <= 0)
 932                 return r;
 933
 934         l = strv_split_newlines(data);
 935         if (!l)
 936                 return -ENOMEM;
 937
 938         r = set_ensure_allocated(rules, &routing_policy_rule_hash_ops);
 939         if (r < 0)
 940                 return r;
 941
 942         STRV_FOREACH(i, l) {
 943                 _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *rule = NULL;
 944
 945                 p = startswith(*i, "RULE=");
 946                 if (!p)
 947                         continue;
 948
 949                 r = routing_policy_rule_new(&rule);
 950                 if (r < 0)
 951                         return r;
 952
 953                 for (;;) {
 954                         _cleanup_free_ char *word = NULL, *a = NULL, *b = NULL;
 955                         union in_addr_union buffer;
 956                         uint8_t prefixlen;
 957
 958                         r = extract_first_word(&p, &word, NULL, 0);
 959                         if (r < 0)
 960                                 return r;
 961                         if (r == 0)
 962                                 break;
 963
 964                         r = split_pair(word, "=", &a, &b);
 965                         if (r < 0)
 966                                 continue;
 967
 968                         if (STR_IN_SET(a, "from", "to")) {
 969
 970                                 r = in_addr_prefix_from_string(b, AF_INET, &buffer, &prefixlen);
 971                                 if (r < 0) {
 972                                         r = in_addr_prefix_from_string(b, AF_INET6, &buffer, &prefixlen);
 973                                         if (r < 0) {
 974                                                 log_error_errno(r, "RPDB rule prefix is invalid, ignoring assignment: %s", b);
 975                                                 continue;
 976                                         }
 977
 978                                         rule->family = AF_INET6;
 979                                 } else
 980                                         rule->family = AF_INET;
 981
 982                                 if (streq(a, "to")) {
 983                                         rule->to = buffer;
 984                                         rule->to_prefixlen = prefixlen;
 985                                 } else {
 986                                         rule->from = buffer;
 987                                         rule->from_prefixlen = prefixlen;
 988                                 }
 989                         } else if (streq(a, "tos")) {
 990                                 r = safe_atou8(b, &rule->tos);
 991                                 if (r < 0) {
 992                                         log_error_errno(r, "Failed to parse RPDB rule tos, ignoring: %s", b);
 993                                         continue;
 994                                 }
 995                         } else if (streq(a, "table")) {
 996                                 r = safe_atou32(b, &rule->table);
 997                                 if (r < 0) {
 998                                         log_error_errno(r, "Failed to parse RPDB rule table, ignoring: %s", b);
 999                                         continue;
1000                                 }
1001                         } else if (streq(a, "fwmark")) {
1002
1003                                 r = parse_fwmark_fwmask(b, &rule->fwmark, &rule->fwmask);
1004                                 if (r < 0) {
1005                                         log_error_errno(r, "Failed to parse RPDB rule firewall mark or mask, ignoring: %s", a);
1006                                         continue;
1007                                 }
1008                         } else if (streq(a, "iif")) {
1009
1010                                 if (free_and_strdup(&rule->iif, b) < 0)
1011                                         return log_oom();
1012
1013                         } else if (streq(a, "oif")) {
1014
1015                                 if (free_and_strdup(&rule->oif, b) < 0)
1016                                         return log_oom();
1017                         }
1018                 }
1019
1020                 r = set_put(*rules, rule);
1021                 if (r < 0) {
1022                         log_warning_errno(r, "Failed to add RPDB rule to saved DB, ignoring: %s", p);
1023                         continue;
1024                 }
1025
1026                 rule = NULL;
1027         }
1028
1029         return 0;
1030 }
1031
1032 void routing_policy_rule_purge(Manager *m, Link *link) {
1033         RoutingPolicyRule *rule, *existing;
1034         Iterator i;
1035         int r;
1036
1037         assert(m);
1038         assert(link);
1039
1040         SET_FOREACH(rule, m->rules_saved, i) {
1041                 existing = set_get(m->rules_foreign, rule);
1042                 if (existing) {
1043
1044                         r = routing_policy_rule_remove(rule, link, routing_policy_rule_remove_handler);
1045                         if (r < 0) {
1046                                 log_warning_errno(r, "Could not remove routing policy rules: %m");
1047                                 continue;
1048                         }
1049
1050                         link->routing_policy_rule_remove_messages++;
1051                 }
1052         }
1053 }