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 "ip-protocol-list.h"
  10 #include "networkd-routing-policy-rule.h"
  11 #include "netlink-util.h"
  12 #include "networkd-manager.h"
  13 #include "parse-util.h"
  14 #include "socket-util.h"
  15 #include "string-util.h"
  16 #include "strv.h"
  17
  18 int routing_policy_rule_new(RoutingPolicyRule **ret) {
  19         RoutingPolicyRule *rule;
  20
  21         rule = new(RoutingPolicyRule, 1);
  22         if (!rule)
  23                 return -ENOMEM;
  24
  25         *rule = (RoutingPolicyRule) {
  26                 .family = AF_INET,
  27                 .table = RT_TABLE_MAIN,
  28         };
  29
  30         *ret = rule;
  31         return 0;
  32 }
  33
  34 void routing_policy_rule_free(RoutingPolicyRule *rule) {
  35
  36         if (!rule)
  37                 return;
  38
  39         if (rule->network) {
  40                 LIST_REMOVE(rules, rule->network->rules, rule);
  41                 assert(rule->network->n_rules > 0);
  42                 rule->network->n_rules--;
  43
  44                 if (rule->section)
  45                         hashmap_remove(rule->network->rules_by_section, rule->section);
  46         }
  47
  48         if (rule->manager) {
  49                 set_remove(rule->manager->rules, rule);
  50                 set_remove(rule->manager->rules_foreign, rule);
  51         }
  52
  53         network_config_section_free(rule->section);
  54         free(rule->iif);
  55         free(rule->oif);
  56         free(rule);
  57 }
  58
  59 static void routing_policy_rule_hash_func(const RoutingPolicyRule *rule, struct siphash *state) {
  60         assert(rule);
  61
  62         siphash24_compress(&rule->family, sizeof(rule->family), state);
  63
  64         switch (rule->family) {
  65         case AF_INET:
  66         case AF_INET6:
  67
  68                 siphash24_compress(&rule->from, FAMILY_ADDRESS_SIZE(rule->family), state);
  69                 siphash24_compress(&rule->from_prefixlen, sizeof(rule->from_prefixlen), state);
  70
  71                 siphash24_compress(&rule->to, FAMILY_ADDRESS_SIZE(rule->family), state);
  72                 siphash24_compress(&rule->to_prefixlen, sizeof(rule->to_prefixlen), state);
  73
  74                 siphash24_compress(&rule->tos, sizeof(rule->tos), state);
  75                 siphash24_compress(&rule->fwmark, sizeof(rule->fwmark), state);
  76                 siphash24_compress(&rule->table, sizeof(rule->table), state);
  77
  78                 siphash24_compress(&rule->protocol, sizeof(rule->protocol), state);
  79                 siphash24_compress(&rule->sport, sizeof(rule->sport), state);
  80                 siphash24_compress(&rule->dport, sizeof(rule->dport), state);
  81
  82                 if (rule->iif)
  83                         siphash24_compress(rule->iif, strlen(rule->iif), state);
  84
  85                 if (rule->oif)
  86                         siphash24_compress(rule->oif, strlen(rule->oif), state);
  87
  88                 break;
  89         default:
  90                 /* treat any other address family as AF_UNSPEC */
  91                 break;
  92         }
  93 }
  94
  95 static int routing_policy_rule_compare_func(const RoutingPolicyRule *a, const RoutingPolicyRule *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 = CMP(a->protocol, b->protocol);
 134                 if (r != 0)
 135                         return r;
 136
 137                 r = memcmp(&a->sport, &b->sport, sizeof(a->sport));
 138                 if (r != 0)
 139                         return r;
 140
 141                 r = memcmp(&a->dport, &b->dport, sizeof(a->dport));
 142                 if (r != 0)
 143                         return r;
 144
 145                 r = memcmp(&a->from, &b->from, FAMILY_ADDRESS_SIZE(a->family));
 146                 if (r != 0)
 147                         return r;
 148
 149                 return memcmp(&a->to, &b->to, FAMILY_ADDRESS_SIZE(a->family));
 150
 151         default:
 152                 /* treat any other address family as AF_UNSPEC */
 153                 return 0;
 154         }
 155 }
 156
 157 DEFINE_PRIVATE_HASH_OPS(routing_policy_rule_hash_ops, RoutingPolicyRule, routing_policy_rule_hash_func, routing_policy_rule_compare_func);
 158
 159 int routing_policy_rule_get(Manager *m,
 160                             int family,
 161                             const union in_addr_union *from,
 162                             uint8_t from_prefixlen,
 163                             const union in_addr_union *to,
 164                             uint8_t to_prefixlen,
 165                             uint8_t tos,
 166                             uint32_t fwmark,
 167                             uint32_t table,
 168                             const char *iif,
 169                             const char *oif,
 170                             uint8_t protocol,
 171                             struct fib_rule_port_range *sport,
 172                             struct fib_rule_port_range *dport,
 173                             RoutingPolicyRule **ret) {
 174
 175         RoutingPolicyRule rule, *existing;
 176
 177         assert_return(m, -1);
 178
 179         rule = (RoutingPolicyRule) {
 180                 .family = family,
 181                 .from = *from,
 182                 .from_prefixlen = from_prefixlen,
 183                 .to = *to,
 184                 .to_prefixlen = to_prefixlen,
 185                 .tos = tos,
 186                 .fwmark = fwmark,
 187                 .table = table,
 188                 .iif = (char*) iif,
 189                 .oif = (char*) oif,
 190                 .protocol = protocol,
 191                 .sport = *sport,
 192                 .dport = *dport,
 193         };
 194
 195         existing = set_get(m->rules, &rule);
 196         if (existing) {
 197                 if (ret)
 198                         *ret = existing;
 199                 return 1;
 200         }
 201
 202         existing = set_get(m->rules_foreign, &rule);
 203         if (existing) {
 204                 if (ret)
 205                         *ret = existing;
 206                 return 0;
 207         }
 208
 209         return -ENOENT;
 210 }
 211
 212 int routing_policy_rule_make_local(Manager *m, RoutingPolicyRule *rule) {
 213         int r;
 214
 215         assert(m);
 216
 217         if (set_contains(m->rules_foreign, rule)) {
 218                 set_remove(m->rules_foreign, rule);
 219
 220                 r = set_ensure_allocated(&m->rules, &routing_policy_rule_hash_ops);
 221                 if (r < 0)
 222                         return r;
 223
 224                 return set_put(m->rules, rule);
 225         }
 226
 227         return -ENOENT;
 228 }
 229
 230 static int routing_policy_rule_add_internal(Manager *m,
 231                                             Set **rules,
 232                                             int family,
 233                                             const union in_addr_union *from,
 234                                             uint8_t from_prefixlen,
 235                                             const union in_addr_union *to,
 236                                             uint8_t to_prefixlen,
 237                                             uint8_t tos,
 238                                             uint32_t fwmark,
 239                                             uint32_t table,
 240                                             const char *_iif,
 241                                             const char *_oif,
 242                                             uint8_t protocol,
 243                                             const struct fib_rule_port_range *sport,
 244                                             const struct fib_rule_port_range *dport,
 245                                             RoutingPolicyRule **ret) {
 246
 247         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *rule = NULL;
 248         _cleanup_free_ char *iif = NULL, *oif = NULL;
 249         int r;
 250
 251         assert_return(rules, -EINVAL);
 252
 253         if (_iif) {
 254                 iif = strdup(_iif);
 255                 if (!iif)
 256                         return -ENOMEM;
 257         }
 258
 259         if (_oif) {
 260                 oif = strdup(_oif);
 261                 if (!oif)
 262                         return -ENOMEM;
 263         }
 264
 265         r = routing_policy_rule_new(&rule);
 266         if (r < 0)
 267                 return r;
 268
 269         rule->manager = m;
 270         rule->family = family;
 271         rule->from = *from;
 272         rule->from_prefixlen = from_prefixlen;
 273         rule->to = *to;
 274         rule->to_prefixlen = to_prefixlen;
 275         rule->tos = tos;
 276         rule->fwmark = fwmark;
 277         rule->table = table;
 278         rule->iif = iif;
 279         rule->oif = oif;
 280         rule->protocol = protocol;
 281         rule->sport = *sport;
 282         rule->dport = *dport;
 283
 284         r = set_ensure_allocated(rules, &routing_policy_rule_hash_ops);
 285         if (r < 0)
 286                 return r;
 287
 288         r = set_put(*rules, rule);
 289         if (r < 0)
 290                 return r;
 291
 292         if (ret)
 293                 *ret = rule;
 294
 295         rule = NULL;
 296         iif = oif = NULL;
 297
 298         return 0;
 299 }
 300
 301 int routing_policy_rule_add(Manager *m,
 302                             int family,
 303                             const union in_addr_union *from,
 304                             uint8_t from_prefixlen,
 305                             const union in_addr_union *to,
 306                             uint8_t to_prefixlen,
 307                             uint8_t tos,
 308                             uint32_t fwmark,
 309                             uint32_t table,
 310                             const char *iif,
 311                             const char *oif,
 312                             uint8_t protocol,
 313                             const struct fib_rule_port_range *sport,
 314                             const struct fib_rule_port_range *dport,
 315                             RoutingPolicyRule **ret) {
 316
 317         return routing_policy_rule_add_internal(m, &m->rules, family, from, from_prefixlen, to, to_prefixlen, tos, fwmark, table, iif, oif, protocol, sport, dport, ret);
 318 }
 319
 320 int routing_policy_rule_add_foreign(Manager *m,
 321                                     int family,
 322                                     const union in_addr_union *from,
 323                                     uint8_t from_prefixlen,
 324                                     const union in_addr_union *to,
 325                                     uint8_t to_prefixlen,
 326                                     uint8_t tos,
 327                                     uint32_t fwmark,
 328                                     uint32_t table,
 329                                     const char *iif,
 330                                     const char *oif,
 331                                     uint8_t protocol,
 332                                     const struct fib_rule_port_range *sport,
 333                                     const struct fib_rule_port_range *dport,
 334                                     RoutingPolicyRule **ret) {
 335         return routing_policy_rule_add_internal(m, &m->rules_foreign, family, from, from_prefixlen, to, to_prefixlen, tos, fwmark, table, iif, oif, protocol, sport, dport, ret);
 336 }
 337
 338 static int routing_policy_rule_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
 339         int r;
 340
 341         assert(m);
 342         assert(link);
 343         assert(link->ifname);
 344
 345         link->routing_policy_rule_remove_messages--;
 346
 347         if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
 348                 return 1;
 349
 350         r = sd_netlink_message_get_errno(m);
 351         if (r < 0)
 352                 log_link_warning_errno(link, r, "Could not drop routing policy rule: %m");
 353
 354         return 1;
 355 }
 356
 357 int routing_policy_rule_remove(RoutingPolicyRule *routing_policy_rule, Link *link, link_netlink_message_handler_t callback) {
 358         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
 359         int r;
 360
 361         assert(routing_policy_rule);
 362         assert(link);
 363         assert(link->manager);
 364         assert(link->manager->rtnl);
 365         assert(link->ifindex > 0);
 366         assert(IN_SET(routing_policy_rule->family, AF_INET, AF_INET6));
 367
 368         r = sd_rtnl_message_new_routing_policy_rule(link->manager->rtnl, &m, RTM_DELRULE, routing_policy_rule->family);
 369         if (r < 0)
 370                 return log_error_errno(r, "Could not allocate RTM_DELRULE message: %m");
 371
 372         if (!in_addr_is_null(routing_policy_rule->family, &routing_policy_rule->from)) {
 373                 if (routing_policy_rule->family == AF_INET)
 374                         r = sd_netlink_message_append_in_addr(m, FRA_SRC, &routing_policy_rule->from.in);
 375                 else
 376                         r = sd_netlink_message_append_in6_addr(m, FRA_SRC, &routing_policy_rule->from.in6);
 377
 378                 if (r < 0)
 379                         return log_error_errno(r, "Could not append FRA_SRC attribute: %m");
 380
 381                 r = sd_rtnl_message_routing_policy_rule_set_rtm_src_prefixlen(m, routing_policy_rule->from_prefixlen);
 382                 if (r < 0)
 383                         return log_error_errno(r, "Could not set source prefix length: %m");
 384         }
 385
 386         if (!in_addr_is_null(routing_policy_rule->family, &routing_policy_rule->to)) {
 387                 if (routing_policy_rule->family == AF_INET)
 388                         r = sd_netlink_message_append_in_addr(m, FRA_DST, &routing_policy_rule->to.in);
 389                 else
 390                         r = sd_netlink_message_append_in6_addr(m, FRA_DST, &routing_policy_rule->to.in6);
 391
 392                 if (r < 0)
 393                         return log_error_errno(r, "Could not append FRA_DST attribute: %m");
 394
 395                 r = sd_rtnl_message_routing_policy_rule_set_rtm_dst_prefixlen(m, routing_policy_rule->to_prefixlen);
 396                 if (r < 0)
 397                         return log_error_errno(r, "Could not set destination prefix length: %m");
 398         }
 399
 400         r = netlink_call_async(link->manager->rtnl, NULL, m,
 401                                callback ?: routing_policy_rule_remove_handler,
 402                                link_netlink_destroy_callback, link);
 403         if (r < 0)
 404                 return log_error_errno(r, "Could not send rtnetlink message: %m");
 405
 406         link_ref(link);
 407
 408         return 0;
 409 }
 410
 411 static int routing_policy_rule_new_static(Network *network, const char *filename, unsigned section_line, RoutingPolicyRule **ret) {
 412         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *rule = NULL;
 413         _cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL;
 414         int r;
 415
 416         assert(network);
 417         assert(ret);
 418         assert(!!filename == (section_line > 0));
 419
 420         if (filename) {
 421                 r = network_config_section_new(filename, section_line, &n);
 422                 if (r < 0)
 423                         return r;
 424
 425                 rule = hashmap_get(network->rules_by_section, n);
 426                 if (rule) {
 427                         *ret = TAKE_PTR(rule);
 428
 429                         return 0;
 430                 }
 431         }
 432
 433         r = routing_policy_rule_new(&rule);
 434         if (r < 0)
 435                 return r;
 436
 437         rule->network = network;
 438         LIST_APPEND(rules, network->rules, rule);
 439         network->n_rules++;
 440
 441         if (filename) {
 442                 rule->section = TAKE_PTR(n);
 443
 444                 r = hashmap_ensure_allocated(&network->rules_by_section, &network_config_hash_ops);
 445                 if (r < 0)
 446                         return r;
 447
 448                 r = hashmap_put(network->rules_by_section, rule->section, rule);
 449                 if (r < 0)
 450                         return r;
 451         }
 452
 453         *ret = TAKE_PTR(rule);
 454
 455         return 0;
 456 }
 457
 458 static int routing_policy_rule_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
 459         int r;
 460
 461         assert(rtnl);
 462         assert(m);
 463         assert(link);
 464         assert(link->ifname);
 465         assert(link->routing_policy_rule_messages > 0);
 466
 467         link->routing_policy_rule_messages--;
 468
 469         if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
 470                 return 1;
 471
 472         r = sd_netlink_message_get_errno(m);
 473         if (r < 0 && r != -EEXIST)
 474                 log_link_warning_errno(link, r, "Could not add routing policy rule: %m");
 475
 476         if (link->routing_policy_rule_messages == 0) {
 477                 log_link_debug(link, "Routing policy rule configured");
 478                 link->routing_policy_rules_configured = true;
 479                 link_check_ready(link);
 480         }
 481
 482         return 1;
 483 }
 484
 485 int routing_policy_rule_configure(RoutingPolicyRule *rule, Link *link, link_netlink_message_handler_t callback, bool update) {
 486         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
 487         int r;
 488
 489         assert(rule);
 490         assert(link);
 491         assert(link->ifindex > 0);
 492         assert(link->manager);
 493         assert(link->manager->rtnl);
 494
 495         r = sd_rtnl_message_new_routing_policy_rule(link->manager->rtnl, &m, RTM_NEWRULE, rule->family);
 496         if (r < 0)
 497                 return log_error_errno(r, "Could not allocate RTM_NEWRULE message: %m");
 498
 499         if (!in_addr_is_null(rule->family, &rule->from)) {
 500                 if (rule->family == AF_INET)
 501                         r = sd_netlink_message_append_in_addr(m, FRA_SRC, &rule->from.in);
 502                 else
 503                         r = sd_netlink_message_append_in6_addr(m, FRA_SRC, &rule->from.in6);
 504
 505                 if (r < 0)
 506                         return log_error_errno(r, "Could not append FRA_SRC attribute: %m");
 507
 508                 r = sd_rtnl_message_routing_policy_rule_set_rtm_src_prefixlen(m, rule->from_prefixlen);
 509                 if (r < 0)
 510                         return log_error_errno(r, "Could not set source prefix length: %m");
 511         }
 512
 513         if (!in_addr_is_null(rule->family, &rule->to)) {
 514                 if (rule->family == AF_INET)
 515                         r = sd_netlink_message_append_in_addr(m, FRA_DST, &rule->to.in);
 516                 else
 517                         r = sd_netlink_message_append_in6_addr(m, FRA_DST, &rule->to.in6);
 518
 519                 if (r < 0)
 520                         return log_error_errno(r, "Could not append FRA_DST attribute: %m");
 521
 522                 r = sd_rtnl_message_routing_policy_rule_set_rtm_dst_prefixlen(m, rule->to_prefixlen);
 523                 if (r < 0)
 524                         return log_error_errno(r, "Could not set destination prefix length: %m");
 525         }
 526
 527         r = sd_netlink_message_append_u32(m, FRA_PRIORITY, rule->priority);
 528         if (r < 0)
 529                 return log_error_errno(r, "Could not append FRA_PRIORITY attribute: %m");
 530
 531         if (rule->tos > 0) {
 532                 r = sd_rtnl_message_routing_policy_rule_set_tos(m, rule->tos);
 533                 if (r < 0)
 534                         return log_error_errno(r, "Could not set ip rule tos: %m");
 535         }
 536
 537         if (rule->table < 256) {
 538                 r = sd_rtnl_message_routing_policy_rule_set_table(m, rule->table);
 539                 if (r < 0)
 540                         return log_error_errno(r, "Could not set ip rule table: %m");
 541         } else {
 542                 r = sd_rtnl_message_routing_policy_rule_set_table(m, RT_TABLE_UNSPEC);
 543                 if (r < 0)
 544                         return log_error_errno(r, "Could not set ip rule table: %m");
 545
 546                 r = sd_netlink_message_append_u32(m, FRA_TABLE, rule->table);
 547                 if (r < 0)
 548                         return log_error_errno(r, "Could not append FRA_TABLE attribute: %m");
 549         }
 550
 551         if (rule->fwmark > 0) {
 552                 r = sd_netlink_message_append_u32(m, FRA_FWMARK, rule->fwmark);
 553                 if (r < 0)
 554                         return log_error_errno(r, "Could not append FRA_FWMARK attribute: %m");
 555         }
 556
 557         if (rule->fwmask > 0) {
 558                 r = sd_netlink_message_append_u32(m, FRA_FWMASK, rule->fwmask);
 559                 if (r < 0)
 560                         return log_error_errno(r, "Could not append FRA_FWMASK attribute: %m");
 561         }
 562
 563         if (rule->iif) {
 564                 r = sd_netlink_message_append_string(m, FRA_IFNAME, rule->iif);
 565                 if (r < 0)
 566                         return log_error_errno(r, "Could not append FRA_IFNAME attribute: %m");
 567         }
 568
 569         if (rule->oif) {
 570                 r = sd_netlink_message_append_string(m, FRA_OIFNAME, rule->oif);
 571                 if (r < 0)
 572                         return log_error_errno(r, "Could not append FRA_OIFNAME attribute: %m");
 573         }
 574
 575         r = sd_netlink_message_append_u8(m, FRA_IP_PROTO, rule->protocol);
 576         if (r < 0)
 577                 return log_error_errno(r, "Could not append FRA_IP_PROTO attribute: %m");
 578
 579         if (rule->sport.start != 0 || rule->sport.end != 0) {
 580                 r = sd_netlink_message_append_data(m, FRA_SPORT_RANGE, &rule->sport, sizeof(rule->sport));
 581                 if (r < 0)
 582                         return log_error_errno(r, "Could not append FRA_SPORT_RANGE attribute: %m");
 583         }
 584
 585         if (rule->dport.start != 0 || rule->dport.end != 0) {
 586                 r = sd_netlink_message_append_data(m, FRA_DPORT_RANGE, &rule->dport, sizeof(rule->dport));
 587                 if (r < 0)
 588                         return log_error_errno(r, "Could not append FRA_DPORT_RANGE attribute: %m");
 589         }
 590
 591         if (rule->invert_rule) {
 592                 r = sd_rtnl_message_routing_policy_rule_set_flags(m, FIB_RULE_INVERT);
 593                 if (r < 0)
 594                         return log_error_errno(r, "Could not append FIB_RULE_INVERT attribute: %m");
 595         }
 596
 597         rule->link = link;
 598
 599         r = netlink_call_async(link->manager->rtnl, NULL, m,
 600                                callback ?: routing_policy_rule_handler,
 601                                link_netlink_destroy_callback, link);
 602         if (r < 0)
 603                 return log_error_errno(r, "Could not send rtnetlink message: %m");
 604
 605         link_ref(link);
 606
 607         r = routing_policy_rule_add(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
 608                                     rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif, rule->protocol, &rule->sport, &rule->dport, NULL);
 609         if (r < 0)
 610                 return log_error_errno(r, "Could not add rule: %m");
 611
 612         return 0;
 613 }
 614
 615 static int parse_fwmark_fwmask(const char *s, uint32_t *fwmark, uint32_t *fwmask) {
 616         _cleanup_free_ char *f = NULL;
 617         char *p;
 618         int r;
 619
 620         assert(s);
 621
 622         f = strdup(s);
 623         if (!f)
 624                 return -ENOMEM;
 625
 626         p = strchr(f, '/');
 627         if (p)
 628                 *p++ = '\0';
 629
 630         r = safe_atou32(f, fwmark);
 631         if (r < 0)
 632                 return log_error_errno(r, "Failed to parse RPDB rule firewall mark, ignoring: %s", f);
 633
 634         if (p) {
 635                 r = safe_atou32(p, fwmask);
 636                 if (r < 0)
 637                         return log_error_errno(r, "Failed to parse RPDB rule mask, ignoring: %s", f);
 638         }
 639
 640         return 0;
 641 }
 642
 643 int config_parse_routing_policy_rule_tos(
 644                 const char *unit,
 645                 const char *filename,
 646                 unsigned line,
 647                 const char *section,
 648                 unsigned section_line,
 649                 const char *lvalue,
 650                 int ltype,
 651                 const char *rvalue,
 652                 void *data,
 653                 void *userdata) {
 654
 655         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *n = NULL;
 656         Network *network = userdata;
 657         int r;
 658
 659         assert(filename);
 660         assert(section);
 661         assert(lvalue);
 662         assert(rvalue);
 663         assert(data);
 664
 665         r = routing_policy_rule_new_static(network, filename, section_line, &n);
 666         if (r < 0)
 667                 return r;
 668
 669         r = safe_atou8(rvalue, &n->tos);
 670         if (r < 0) {
 671                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse RPDB rule tos, ignoring: %s", rvalue);
 672                 return 0;
 673         }
 674
 675         n = NULL;
 676
 677         return 0;
 678 }
 679
 680 int config_parse_routing_policy_rule_priority(
 681                 const char *unit,
 682                 const char *filename,
 683                 unsigned line,
 684                 const char *section,
 685                 unsigned section_line,
 686                 const char *lvalue,
 687                 int ltype,
 688                 const char *rvalue,
 689                 void *data,
 690                 void *userdata) {
 691
 692         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *n = NULL;
 693         Network *network = userdata;
 694         int r;
 695
 696         assert(filename);
 697         assert(section);
 698         assert(lvalue);
 699         assert(rvalue);
 700         assert(data);
 701
 702         r = routing_policy_rule_new_static(network, filename, section_line, &n);
 703         if (r < 0)
 704                 return r;
 705
 706         r = safe_atou32(rvalue, &n->priority);
 707         if (r < 0) {
 708                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse RPDB rule priority, ignoring: %s", rvalue);
 709                 return 0;
 710         }
 711
 712         n = NULL;
 713
 714         return 0;
 715 }
 716
 717 int config_parse_routing_policy_rule_table(
 718                 const char *unit,
 719                 const char *filename,
 720                 unsigned line,
 721                 const char *section,
 722                 unsigned section_line,
 723                 const char *lvalue,
 724                 int ltype,
 725                 const char *rvalue,
 726                 void *data,
 727                 void *userdata) {
 728
 729         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *n = NULL;
 730         Network *network = userdata;
 731         int r;
 732
 733         assert(filename);
 734         assert(section);
 735         assert(lvalue);
 736         assert(rvalue);
 737         assert(data);
 738
 739         r = routing_policy_rule_new_static(network, filename, section_line, &n);
 740         if (r < 0)
 741                 return r;
 742
 743         r = safe_atou32(rvalue, &n->table);
 744         if (r < 0) {
 745                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse RPDB rule table, ignoring: %s", rvalue);
 746                 return 0;
 747         }
 748
 749         n = NULL;
 750
 751         return 0;
 752 }
 753
 754 int config_parse_routing_policy_rule_fwmark_mask(
 755                 const char *unit,
 756                 const char *filename,
 757                 unsigned line,
 758                 const char *section,
 759                 unsigned section_line,
 760                 const char *lvalue,
 761                 int ltype,
 762                 const char *rvalue,
 763                 void *data,
 764                 void *userdata) {
 765
 766         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *n = NULL;
 767         Network *network = userdata;
 768         int r;
 769
 770         assert(filename);
 771         assert(section);
 772         assert(lvalue);
 773         assert(rvalue);
 774         assert(data);
 775
 776         r = routing_policy_rule_new_static(network, filename, section_line, &n);
 777         if (r < 0)
 778                 return r;
 779
 780         r = parse_fwmark_fwmask(rvalue, &n->fwmark, &n->fwmask);
 781         if (r < 0) {
 782                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse RPDB rule firewall mark or mask, ignoring: %s", rvalue);
 783                 return 0;
 784         }
 785
 786         n = NULL;
 787
 788         return 0;
 789 }
 790
 791 int config_parse_routing_policy_rule_prefix(
 792                 const char *unit,
 793                 const char *filename,
 794                 unsigned line,
 795                 const char *section,
 796                 unsigned section_line,
 797                 const char *lvalue,
 798                 int ltype,
 799                 const char *rvalue,
 800                 void *data,
 801                 void *userdata) {
 802
 803         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *n = NULL;
 804         Network *network = userdata;
 805         union in_addr_union *buffer;
 806         uint8_t *prefixlen;
 807         int r;
 808
 809         assert(filename);
 810         assert(section);
 811         assert(lvalue);
 812         assert(rvalue);
 813         assert(data);
 814
 815         r = routing_policy_rule_new_static(network, filename, section_line, &n);
 816         if (r < 0)
 817                 return r;
 818
 819         if (streq(lvalue, "To")) {
 820                 buffer = &n->to;
 821                 prefixlen = &n->to_prefixlen;
 822         } else {
 823                 buffer = &n->from;
 824                 prefixlen = &n->from_prefixlen;
 825         }
 826
 827         r = in_addr_prefix_from_string_auto(rvalue, &n->family, buffer, prefixlen);
 828         if (r < 0) {
 829                 log_syntax(unit, LOG_ERR, filename, line, r, "RPDB rule prefix is invalid, ignoring assignment: %s", rvalue);
 830                 return 0;
 831         }
 832
 833         n = NULL;
 834
 835         return 0;
 836 }
 837
 838 int config_parse_routing_policy_rule_device(
 839                 const char *unit,
 840                 const char *filename,
 841                 unsigned line,
 842                 const char *section,
 843                 unsigned section_line,
 844                 const char *lvalue,
 845                 int ltype,
 846                 const char *rvalue,
 847                 void *data,
 848                 void *userdata) {
 849
 850         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *n = NULL;
 851         Network *network = userdata;
 852         int r;
 853
 854         assert(filename);
 855         assert(section);
 856         assert(lvalue);
 857         assert(rvalue);
 858         assert(data);
 859
 860         r = routing_policy_rule_new_static(network, filename, section_line, &n);
 861         if (r < 0)
 862                 return r;
 863
 864         if (!ifname_valid(rvalue)) {
 865                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse '%s' interface name, ignoring: %s", lvalue, rvalue);
 866                 return 0;
 867         }
 868
 869         if (streq(lvalue, "IncomingInterface")) {
 870                 r = free_and_strdup(&n->iif, rvalue);
 871                 if (r < 0)
 872                         return log_oom();
 873         } else {
 874                 r = free_and_strdup(&n->oif, rvalue);
 875                 if (r < 0)
 876                         return log_oom();
 877         }
 878
 879         n = NULL;
 880
 881         return 0;
 882 }
 883
 884 int config_parse_routing_policy_rule_port_range(
 885                 const char *unit,
 886                 const char *filename,
 887                 unsigned line,
 888                 const char *section,
 889                 unsigned section_line,
 890                 const char *lvalue,
 891                 int ltype,
 892                 const char *rvalue,
 893                 void *data,
 894                 void *userdata) {
 895         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *n = NULL;
 896         Network *network = userdata;
 897         uint16_t low, high;
 898         int r;
 899
 900         assert(filename);
 901         assert(section);
 902         assert(lvalue);
 903         assert(rvalue);
 904         assert(data);
 905
 906         r = routing_policy_rule_new_static(network, filename, section_line, &n);
 907         if (r < 0)
 908                 return r;
 909
 910         r = parse_ip_port_range(rvalue, &low, &high);
 911         if (r < 0) {
 912                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse routing policy rule port range '%s'", rvalue);
 913                 return 0;
 914         }
 915
 916         if (streq(lvalue, "SourcePort")) {
 917                 n->sport.start = low;
 918                 n->sport.end = high;
 919         } else {
 920                 n->dport.start = low;
 921                 n->dport.end = high;
 922         }
 923
 924         n = NULL;
 925
 926         return 0;
 927 }
 928
 929 int config_parse_routing_policy_rule_ip_protocol(
 930                 const char *unit,
 931                 const char *filename,
 932                 unsigned line,
 933                 const char *section,
 934                 unsigned section_line,
 935                 const char *lvalue,
 936                 int ltype,
 937                 const char *rvalue,
 938                 void *data,
 939                 void *userdata) {
 940
 941         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *n = NULL;
 942         Network *network = userdata;
 943         int r;
 944
 945         assert(filename);
 946         assert(section);
 947         assert(lvalue);
 948         assert(rvalue);
 949         assert(data);
 950
 951         r = routing_policy_rule_new_static(network, filename, section_line, &n);
 952         if (r < 0)
 953                 return r;
 954
 955         r = parse_ip_protocol(rvalue);
 956         if (r < 0) {
 957                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse IP protocol '%s' for routing policy rule, ignoring: %m", rvalue);
 958                 return 0;
 959         }
 960
 961         n->protocol = r;
 962
 963         n = NULL;
 964
 965         return 0;
 966 }
 967
 968 int config_parse_routing_policy_rule_invert(
 969                 const char *unit,
 970                 const char *filename,
 971                 unsigned line,
 972                 const char *section,
 973                 unsigned section_line,
 974                 const char *lvalue,
 975                 int ltype,
 976                 const char *rvalue,
 977                 void *data,
 978                 void *userdata) {
 979
 980         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *n = NULL;
 981         Network *network = userdata;
 982         int r;
 983
 984         assert(filename);
 985         assert(section);
 986         assert(lvalue);
 987         assert(rvalue);
 988         assert(data);
 989
 990         r = routing_policy_rule_new_static(network, filename, section_line, &n);
 991         if (r < 0)
 992                 return r;
 993
 994         r = parse_boolean(rvalue);
 995         if (r < 0) {
 996                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse RPDB rule invert, ignoring: %s", rvalue);
 997                 return 0;
 998         }
 999
1000         n->invert_rule = r;
1001
1002         n = NULL;
1003
1004         return 0;
1005 }
1006
1007 static int routing_policy_rule_read_full_file(const char *state_file, char **ret) {
1008         _cleanup_free_ char *s = NULL;
1009         size_t size;
1010         int r;
1011
1012         assert(state_file);
1013
1014         r = read_full_file(state_file, &s, &size);
1015         if (r == -ENOENT)
1016                 return -ENODATA;
1017         if (r < 0)
1018                 return r;
1019         if (size <= 0)
1020                 return -ENODATA;
1021
1022         *ret = TAKE_PTR(s);
1023
1024         return size;
1025 }
1026
1027 int routing_policy_serialize_rules(Set *rules, FILE *f) {
1028         RoutingPolicyRule *rule = NULL;
1029         Iterator i;
1030         int r;
1031
1032         assert(f);
1033
1034         SET_FOREACH(rule, rules, i) {
1035                 _cleanup_free_ char *from_str = NULL, *to_str = NULL;
1036                 bool space = false;
1037
1038                 fputs("RULE=", f);
1039
1040                 if (!in_addr_is_null(rule->family, &rule->from)) {
1041                         r = in_addr_to_string(rule->family, &rule->from, &from_str);
1042                         if (r < 0)
1043                                 return r;
1044
1045                         fprintf(f, "from=%s/%hhu",
1046                                 from_str, rule->from_prefixlen);
1047                         space = true;
1048                 }
1049
1050                 if (!in_addr_is_null(rule->family, &rule->to)) {
1051                         r = in_addr_to_string(rule->family, &rule->to, &to_str);
1052                         if (r < 0)
1053                                 return r;
1054
1055                         fprintf(f, "%sto=%s/%hhu",
1056                                 space ? " " : "",
1057                                 to_str, rule->to_prefixlen);
1058                         space = true;
1059                 }
1060
1061                 if (rule->tos != 0) {
1062                         fprintf(f, "%stos=%hhu",
1063                                 space ? " " : "",
1064                                 rule->tos);
1065                         space = true;
1066                 }
1067
1068                 if (rule->fwmark != 0) {
1069                         fprintf(f, "%sfwmark=%"PRIu32"/%"PRIu32,
1070                                 space ? " " : "",
1071                                 rule->fwmark, rule->fwmask);
1072                         space = true;
1073                 }
1074
1075                 if (rule->iif) {
1076                         fprintf(f, "%siif=%s",
1077                                 space ? " " : "",
1078                                 rule->iif);
1079                         space = true;
1080                 }
1081
1082                 if (rule->oif) {
1083                         fprintf(f, "%soif=%s",
1084                                 space ? " " : "",
1085                                 rule->oif);
1086                         space = true;
1087                 }
1088
1089                 if (rule->protocol != 0) {
1090                         fprintf(f, "%sprotocol=%hhu",
1091                                 space ? " " : "",
1092                                 rule->protocol);
1093                         space = true;
1094                 }
1095
1096                 if (rule->sport.start != 0 || rule->sport.end != 0) {
1097                         fprintf(f, "%ssourcesport=%"PRIu16"-%"PRIu16,
1098                                 space ? " " : "",
1099                                 rule->sport.start, rule->sport.end);
1100                         space = true;
1101                 }
1102
1103                 if (rule->dport.start != 0 || rule->dport.end != 0) {
1104                         fprintf(f, "%sdestinationport=%"PRIu16"-%"PRIu16,
1105                                 space ? " " : "",
1106                                 rule->dport.start, rule->dport.end);
1107                         space = true;
1108                 }
1109
1110                 fprintf(f, "%stable=%"PRIu32 "\n",
1111                         space ? " " : "",
1112                         rule->table);
1113         }
1114
1115         return 0;
1116 }
1117
1118 int routing_policy_load_rules(const char *state_file, Set **rules) {
1119         _cleanup_strv_free_ char **l = NULL;
1120         _cleanup_free_ char *data = NULL;
1121         uint16_t low = 0, high = 0;
1122         const char *p;
1123         char **i;
1124         int r;
1125
1126         assert(state_file);
1127         assert(rules);
1128
1129         r = routing_policy_rule_read_full_file(state_file, &data);
1130         if (r <= 0)
1131                 return r;
1132
1133         l = strv_split_newlines(data);
1134         if (!l)
1135                 return -ENOMEM;
1136
1137         r = set_ensure_allocated(rules, &routing_policy_rule_hash_ops);
1138         if (r < 0)
1139                 return r;
1140
1141         STRV_FOREACH(i, l) {
1142                 _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *rule = NULL;
1143
1144                 p = startswith(*i, "RULE=");
1145                 if (!p)
1146                         continue;
1147
1148                 r = routing_policy_rule_new(&rule);
1149                 if (r < 0)
1150                         return r;
1151
1152                 for (;;) {
1153                         _cleanup_free_ char *word = NULL, *a = NULL, *b = NULL;
1154
1155                         r = extract_first_word(&p, &word, NULL, 0);
1156                         if (r < 0)
1157                                 return r;
1158                         if (r == 0)
1159                                 break;
1160
1161                         r = split_pair(word, "=", &a, &b);
1162                         if (r < 0)
1163                                 continue;
1164
1165                         if (STR_IN_SET(a, "from", "to")) {
1166                                 union in_addr_union *buffer;
1167                                 uint8_t *prefixlen;
1168
1169                                 if (streq(a, "to")) {
1170                                         buffer = &rule->to;
1171                                         prefixlen = &rule->to_prefixlen;
1172                                 } else {
1173                                         buffer = &rule->from;
1174                                         prefixlen = &rule->from_prefixlen;
1175                                 }
1176
1177                                 r = in_addr_prefix_from_string_auto(b, &rule->family, buffer, prefixlen);
1178                                 if (r < 0) {
1179                                         log_error_errno(r, "RPDB rule prefix is invalid, ignoring assignment: %s", b);
1180                                         continue;
1181                                 }
1182
1183                         } else if (streq(a, "tos")) {
1184                                 r = safe_atou8(b, &rule->tos);
1185                                 if (r < 0) {
1186                                         log_error_errno(r, "Failed to parse RPDB rule tos, ignoring: %s", b);
1187                                         continue;
1188                                 }
1189                         } else if (streq(a, "table")) {
1190                                 r = safe_atou32(b, &rule->table);
1191                                 if (r < 0) {
1192                                         log_error_errno(r, "Failed to parse RPDB rule table, ignoring: %s", b);
1193                                         continue;
1194                                 }
1195                         } else if (streq(a, "fwmark")) {
1196
1197                                 r = parse_fwmark_fwmask(b, &rule->fwmark, &rule->fwmask);
1198                                 if (r < 0) {
1199                                         log_error_errno(r, "Failed to parse RPDB rule firewall mark or mask, ignoring: %s", a);
1200                                         continue;
1201                                 }
1202                         } else if (streq(a, "iif")) {
1203
1204                                 if (free_and_strdup(&rule->iif, b) < 0)
1205                                         return log_oom();
1206
1207                         } else if (streq(a, "oif")) {
1208
1209                                 if (free_and_strdup(&rule->oif, b) < 0)
1210                                         return log_oom();
1211                         } else if (streq(a, "protocol")) {
1212                                 r = safe_atou8(b, &rule->protocol);
1213                                 if (r < 0) {
1214                                         log_error_errno(r, "Failed to parse RPDB rule protocol, ignoring: %s", b);
1215                                         continue;
1216                                 }
1217                         } else if (streq(a, "sourceport")) {
1218
1219                                 r = parse_ip_port_range(b, &low, &high);
1220                                 if (r < 0) {
1221                                         log_error_errno(r, "Invalid routing policy rule source port range, ignoring assignment:'%s'", b);
1222                                         continue;
1223                                 }
1224
1225                                 rule->sport.start = low;
1226                                 rule->sport.end = high;
1227
1228                         } else if (streq(a, "destinationport")) {
1229
1230                                 r = parse_ip_port_range(b, &low, &high);
1231                                 if (r < 0) {
1232                                         log_error_errno(r, "Invalid routing policy rule destination port range, ignoring assignment:'%s'", b);
1233                                         continue;
1234                                 }
1235
1236                                 rule->dport.start = low;
1237                                 rule->dport.end = high;
1238                         }
1239                 }
1240
1241                 r = set_put(*rules, rule);
1242                 if (r < 0) {
1243                         log_warning_errno(r, "Failed to add RPDB rule to saved DB, ignoring: %s", p);
1244                         continue;
1245                 }
1246
1247                 rule = NULL;
1248         }
1249
1250         return 0;
1251 }
1252
1253 void routing_policy_rule_purge(Manager *m, Link *link) {
1254         RoutingPolicyRule *rule, *existing;
1255         Iterator i;
1256         int r;
1257
1258         assert(m);
1259         assert(link);
1260
1261         SET_FOREACH(rule, m->rules_saved, i) {
1262                 existing = set_get(m->rules_foreign, rule);
1263                 if (existing) {
1264
1265                         r = routing_policy_rule_remove(rule, link, NULL);
1266                         if (r < 0) {
1267                                 log_warning_errno(r, "Could not remove routing policy rules: %m");
1268                                 continue;
1269                         }
1270
1271                         link->routing_policy_rule_remove_messages++;
1272                 }
1273         }
1274 }