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-protocol-list.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, void *userdata) {
 339         Link *link = userdata;
 340         int r;
 341
 342         assert(m);
 343         assert(link);
 344         assert(link->ifname);
 345
 346         link->routing_policy_rule_remove_messages--;
 347
 348         if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
 349                 return 1;
 350
 351         r = sd_netlink_message_get_errno(m);
 352         if (r < 0)
 353                 log_link_warning_errno(link, r, "Could not drop routing policy rule: %m");
 354
 355         return 1;
 356 }
 357
 358 int routing_policy_rule_remove(RoutingPolicyRule *routing_policy_rule, Link *link, sd_netlink_message_handler_t callback) {
 359         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
 360         int r;
 361
 362         assert(routing_policy_rule);
 363         assert(link);
 364         assert(link->manager);
 365         assert(link->manager->rtnl);
 366         assert(link->ifindex > 0);
 367         assert(IN_SET(routing_policy_rule->family, AF_INET, AF_INET6));
 368
 369         r = sd_rtnl_message_new_routing_policy_rule(link->manager->rtnl, &m, RTM_DELRULE, routing_policy_rule->family);
 370         if (r < 0)
 371                 return log_error_errno(r, "Could not allocate RTM_DELRULE message: %m");
 372
 373         if (!in_addr_is_null(routing_policy_rule->family, &routing_policy_rule->from)) {
 374                 if (routing_policy_rule->family == AF_INET)
 375                         r = sd_netlink_message_append_in_addr(m, FRA_SRC, &routing_policy_rule->from.in);
 376                 else
 377                         r = sd_netlink_message_append_in6_addr(m, FRA_SRC, &routing_policy_rule->from.in6);
 378
 379                 if (r < 0)
 380                         return log_error_errno(r, "Could not append FRA_SRC attribute: %m");
 381
 382                 r = sd_rtnl_message_routing_policy_rule_set_rtm_src_prefixlen(m, routing_policy_rule->from_prefixlen);
 383                 if (r < 0)
 384                         return log_error_errno(r, "Could not set source prefix length: %m");
 385         }
 386
 387         if (!in_addr_is_null(routing_policy_rule->family, &routing_policy_rule->to)) {
 388                 if (routing_policy_rule->family == AF_INET)
 389                         r = sd_netlink_message_append_in_addr(m, FRA_DST, &routing_policy_rule->to.in);
 390                 else
 391                         r = sd_netlink_message_append_in6_addr(m, FRA_DST, &routing_policy_rule->to.in6);
 392
 393                 if (r < 0)
 394                         return log_error_errno(r, "Could not append FRA_DST attribute: %m");
 395
 396                 r = sd_rtnl_message_routing_policy_rule_set_rtm_dst_prefixlen(m, routing_policy_rule->to_prefixlen);
 397                 if (r < 0)
 398                         return log_error_errno(r, "Could not set destination prefix length: %m");
 399         }
 400
 401         r = sd_netlink_call_async(link->manager->rtnl, NULL, m, callback,
 402                                   link_netlink_destroy_callback, link, 0, __func__);
 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 int link_routing_policy_rule_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
 459         Link *link = userdata;
 460         int r;
 461
 462         assert(rtnl);
 463         assert(m);
 464         assert(link);
 465         assert(link->ifname);
 466         assert(link->routing_policy_rule_messages > 0);
 467
 468         link->routing_policy_rule_messages--;
 469
 470         if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
 471                 return 1;
 472
 473         r = sd_netlink_message_get_errno(m);
 474         if (r < 0 && r != -EEXIST)
 475                 log_link_warning_errno(link, r, "Could not add routing policy rule: %m");
 476
 477         if (link->routing_policy_rule_messages == 0) {
 478                 log_link_debug(link, "Routing policy rule configured");
 479                 link->routing_policy_rules_configured = true;
 480                 link_check_ready(link);
 481         }
 482
 483         return 1;
 484 }
 485
 486 int routing_policy_rule_configure(RoutingPolicyRule *rule, Link *link, sd_netlink_message_handler_t callback, bool update) {
 487         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
 488         int r;
 489
 490         assert(rule);
 491         assert(link);
 492         assert(link->ifindex > 0);
 493         assert(link->manager);
 494         assert(link->manager->rtnl);
 495
 496         r = sd_rtnl_message_new_routing_policy_rule(link->manager->rtnl, &m, RTM_NEWRULE, rule->family);
 497         if (r < 0)
 498                 return log_error_errno(r, "Could not allocate RTM_NEWRULE message: %m");
 499
 500         if (!in_addr_is_null(rule->family, &rule->from)) {
 501                 if (rule->family == AF_INET)
 502                         r = sd_netlink_message_append_in_addr(m, FRA_SRC, &rule->from.in);
 503                 else
 504                         r = sd_netlink_message_append_in6_addr(m, FRA_SRC, &rule->from.in6);
 505
 506                 if (r < 0)
 507                         return log_error_errno(r, "Could not append FRA_SRC attribute: %m");
 508
 509                 r = sd_rtnl_message_routing_policy_rule_set_rtm_src_prefixlen(m, rule->from_prefixlen);
 510                 if (r < 0)
 511                         return log_error_errno(r, "Could not set source prefix length: %m");
 512         }
 513
 514         if (!in_addr_is_null(rule->family, &rule->to)) {
 515                 if (rule->family == AF_INET)
 516                         r = sd_netlink_message_append_in_addr(m, FRA_DST, &rule->to.in);
 517                 else
 518                         r = sd_netlink_message_append_in6_addr(m, FRA_DST, &rule->to.in6);
 519
 520                 if (r < 0)
 521                         return log_error_errno(r, "Could not append FRA_DST attribute: %m");
 522
 523                 r = sd_rtnl_message_routing_policy_rule_set_rtm_dst_prefixlen(m, rule->to_prefixlen);
 524                 if (r < 0)
 525                         return log_error_errno(r, "Could not set destination prefix length: %m");
 526         }
 527
 528         r = sd_netlink_message_append_u32(m, FRA_PRIORITY, rule->priority);
 529         if (r < 0)
 530                 return log_error_errno(r, "Could not append FRA_PRIORITY attribute: %m");
 531
 532         if (rule->tos > 0) {
 533                 r = sd_rtnl_message_routing_policy_rule_set_tos(m, rule->tos);
 534                 if (r < 0)
 535                         return log_error_errno(r, "Could not set ip rule tos: %m");
 536         }
 537
 538         if (rule->table < 256) {
 539                 r = sd_rtnl_message_routing_policy_rule_set_table(m, rule->table);
 540                 if (r < 0)
 541                         return log_error_errno(r, "Could not set ip rule table: %m");
 542         } else {
 543                 r = sd_rtnl_message_routing_policy_rule_set_table(m, RT_TABLE_UNSPEC);
 544                 if (r < 0)
 545                         return log_error_errno(r, "Could not set ip rule table: %m");
 546
 547                 r = sd_netlink_message_append_u32(m, FRA_TABLE, rule->table);
 548                 if (r < 0)
 549                         return log_error_errno(r, "Could not append FRA_TABLE attribute: %m");
 550         }
 551
 552         if (rule->fwmark > 0) {
 553                 r = sd_netlink_message_append_u32(m, FRA_FWMARK, rule->fwmark);
 554                 if (r < 0)
 555                         return log_error_errno(r, "Could not append FRA_FWMARK attribute: %m");
 556         }
 557
 558         if (rule->fwmask > 0) {
 559                 r = sd_netlink_message_append_u32(m, FRA_FWMASK, rule->fwmask);
 560                 if (r < 0)
 561                         return log_error_errno(r, "Could not append FRA_FWMASK attribute: %m");
 562         }
 563
 564         if (rule->iif) {
 565                 r = sd_netlink_message_append_string(m, FRA_IFNAME, rule->iif);
 566                 if (r < 0)
 567                         return log_error_errno(r, "Could not append FRA_IFNAME attribute: %m");
 568         }
 569
 570         if (rule->oif) {
 571                 r = sd_netlink_message_append_string(m, FRA_OIFNAME, rule->oif);
 572                 if (r < 0)
 573                         return log_error_errno(r, "Could not append FRA_OIFNAME attribute: %m");
 574         }
 575
 576         r = sd_netlink_message_append_u8(m, FRA_IP_PROTO, rule->protocol);
 577         if (r < 0)
 578                 return log_error_errno(r, "Could not append FRA_IP_PROTO attribute: %m");
 579
 580         if (rule->sport.start != 0 || rule->sport.end != 0) {
 581                 r = sd_netlink_message_append_data(m, FRA_SPORT_RANGE, &rule->sport, sizeof(rule->sport));
 582                 if (r < 0)
 583                         return log_error_errno(r, "Could not append FRA_SPORT_RANGE attribute: %m");
 584         }
 585
 586         if (rule->dport.start != 0 || rule->dport.end != 0) {
 587                 r = sd_netlink_message_append_data(m, FRA_DPORT_RANGE, &rule->dport, sizeof(rule->dport));
 588                 if (r < 0)
 589                         return log_error_errno(r, "Could not append FRA_DPORT_RANGE attribute: %m");
 590         }
 591
 592         rule->link = link;
 593
 594         r = sd_netlink_call_async(link->manager->rtnl, NULL, m, callback,
 595                                   link_netlink_destroy_callback, link, 0, __func__);
 596         if (r < 0)
 597                 return log_error_errno(r, "Could not send rtnetlink message: %m");
 598
 599         link_ref(link);
 600
 601         r = routing_policy_rule_add(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
 602                                     rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif, rule->protocol, &rule->sport, &rule->dport, NULL);
 603         if (r < 0)
 604                 return log_error_errno(r, "Could not add rule: %m");
 605
 606         return 0;
 607 }
 608
 609 static int parse_fwmark_fwmask(const char *s, uint32_t *fwmark, uint32_t *fwmask) {
 610         _cleanup_free_ char *f = NULL;
 611         char *p;
 612         int r;
 613
 614         assert(s);
 615
 616         f = strdup(s);
 617         if (!f)
 618                 return -ENOMEM;
 619
 620         p = strchr(f, '/');
 621         if (p)
 622                 *p++ = '\0';
 623
 624         r = safe_atou32(f, fwmark);
 625         if (r < 0)
 626                 return log_error_errno(r, "Failed to parse RPDB rule firewall mark, ignoring: %s", f);
 627
 628         if (p) {
 629                 r = safe_atou32(p, fwmask);
 630                 if (r < 0)
 631                         return log_error_errno(r, "Failed to parse RPDB rule mask, ignoring: %s", f);
 632         }
 633
 634         return 0;
 635 }
 636
 637 int config_parse_routing_policy_rule_tos(
 638                 const char *unit,
 639                 const char *filename,
 640                 unsigned line,
 641                 const char *section,
 642                 unsigned section_line,
 643                 const char *lvalue,
 644                 int ltype,
 645                 const char *rvalue,
 646                 void *data,
 647                 void *userdata) {
 648
 649         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *n = NULL;
 650         Network *network = userdata;
 651         int r;
 652
 653         assert(filename);
 654         assert(section);
 655         assert(lvalue);
 656         assert(rvalue);
 657         assert(data);
 658
 659         r = routing_policy_rule_new_static(network, filename, section_line, &n);
 660         if (r < 0)
 661                 return r;
 662
 663         r = safe_atou8(rvalue, &n->tos);
 664         if (r < 0) {
 665                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse RPDB rule tos, ignoring: %s", rvalue);
 666                 return 0;
 667         }
 668
 669         n = NULL;
 670
 671         return 0;
 672 }
 673
 674 int config_parse_routing_policy_rule_priority(
 675                 const char *unit,
 676                 const char *filename,
 677                 unsigned line,
 678                 const char *section,
 679                 unsigned section_line,
 680                 const char *lvalue,
 681                 int ltype,
 682                 const char *rvalue,
 683                 void *data,
 684                 void *userdata) {
 685
 686         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *n = NULL;
 687         Network *network = userdata;
 688         int r;
 689
 690         assert(filename);
 691         assert(section);
 692         assert(lvalue);
 693         assert(rvalue);
 694         assert(data);
 695
 696         r = routing_policy_rule_new_static(network, filename, section_line, &n);
 697         if (r < 0)
 698                 return r;
 699
 700         r = safe_atou32(rvalue, &n->priority);
 701         if (r < 0) {
 702                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse RPDB rule priority, ignoring: %s", rvalue);
 703                 return 0;
 704         }
 705
 706         n = NULL;
 707
 708         return 0;
 709 }
 710
 711 int config_parse_routing_policy_rule_table(
 712                 const char *unit,
 713                 const char *filename,
 714                 unsigned line,
 715                 const char *section,
 716                 unsigned section_line,
 717                 const char *lvalue,
 718                 int ltype,
 719                 const char *rvalue,
 720                 void *data,
 721                 void *userdata) {
 722
 723         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *n = NULL;
 724         Network *network = userdata;
 725         int r;
 726
 727         assert(filename);
 728         assert(section);
 729         assert(lvalue);
 730         assert(rvalue);
 731         assert(data);
 732
 733         r = routing_policy_rule_new_static(network, filename, section_line, &n);
 734         if (r < 0)
 735                 return r;
 736
 737         r = safe_atou32(rvalue, &n->table);
 738         if (r < 0) {
 739                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse RPDB rule table, ignoring: %s", rvalue);
 740                 return 0;
 741         }
 742
 743         n = NULL;
 744
 745         return 0;
 746 }
 747
 748 int config_parse_routing_policy_rule_fwmark_mask(
 749                 const char *unit,
 750                 const char *filename,
 751                 unsigned line,
 752                 const char *section,
 753                 unsigned section_line,
 754                 const char *lvalue,
 755                 int ltype,
 756                 const char *rvalue,
 757                 void *data,
 758                 void *userdata) {
 759
 760         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *n = NULL;
 761         Network *network = userdata;
 762         int r;
 763
 764         assert(filename);
 765         assert(section);
 766         assert(lvalue);
 767         assert(rvalue);
 768         assert(data);
 769
 770         r = routing_policy_rule_new_static(network, filename, section_line, &n);
 771         if (r < 0)
 772                 return r;
 773
 774         r = parse_fwmark_fwmask(rvalue, &n->fwmark, &n->fwmask);
 775         if (r < 0) {
 776                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse RPDB rule firewall mark or mask, ignoring: %s", rvalue);
 777                 return 0;
 778         }
 779
 780         n = NULL;
 781
 782         return 0;
 783 }
 784
 785 int config_parse_routing_policy_rule_prefix(
 786                 const char *unit,
 787                 const char *filename,
 788                 unsigned line,
 789                 const char *section,
 790                 unsigned section_line,
 791                 const char *lvalue,
 792                 int ltype,
 793                 const char *rvalue,
 794                 void *data,
 795                 void *userdata) {
 796
 797         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *n = NULL;
 798         Network *network = userdata;
 799         union in_addr_union buffer;
 800         uint8_t prefixlen;
 801         int r;
 802
 803         assert(filename);
 804         assert(section);
 805         assert(lvalue);
 806         assert(rvalue);
 807         assert(data);
 808
 809         r = routing_policy_rule_new_static(network, filename, section_line, &n);
 810         if (r < 0)
 811                 return r;
 812
 813         r = in_addr_prefix_from_string(rvalue, AF_INET, &buffer, &prefixlen);
 814         if (r < 0) {
 815                 r = in_addr_prefix_from_string(rvalue, AF_INET6, &buffer, &prefixlen);
 816                 if (r < 0) {
 817                         log_syntax(unit, LOG_ERR, filename, line, r, "RPDB rule prefix is invalid, ignoring assignment: %s", rvalue);
 818                         return 0;
 819                 }
 820
 821                 n->family = AF_INET6;
 822         } else
 823                 n->family = AF_INET;
 824
 825         if (streq(lvalue, "To")) {
 826                 n->to = buffer;
 827                 n->to_prefixlen = prefixlen;
 828         } else {
 829                 n->from = buffer;
 830                 n->from_prefixlen = prefixlen;
 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_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 = socket_protocol_from_name(rvalue);
 956         if (r < 0) {
 957                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse routing policy rule protocol, ignoring: %s", rvalue);
 958                 return 0;
 959         }
 960
 961         if (!IN_SET(r, IPPROTO_TCP, IPPROTO_UDP, IPPROTO_SCTP)) {
 962                 log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid protocol '%s'. Protocol should be tcp/udp/sctp, ignoring", rvalue);
 963                 return 0;
 964         }
 965
 966         n->protocol = r;
 967
 968         n = NULL;
 969
 970         return 0;
 971 }
 972
 973 static int routing_policy_rule_read_full_file(const char *state_file, char **ret) {
 974         _cleanup_free_ char *s = NULL;
 975         size_t size;
 976         int r;
 977
 978         assert(state_file);
 979
 980         r = read_full_file(state_file, &s, &size);
 981         if (r == -ENOENT)
 982                 return -ENODATA;
 983         if (r < 0)
 984                 return r;
 985         if (size <= 0)
 986                 return -ENODATA;
 987
 988         *ret = TAKE_PTR(s);
 989
 990         return size;
 991 }
 992
 993 int routing_policy_serialize_rules(Set *rules, FILE *f) {
 994         RoutingPolicyRule *rule = NULL;
 995         Iterator i;
 996         int r;
 997
 998         assert(f);
 999
1000         SET_FOREACH(rule, rules, i) {
1001                 _cleanup_free_ char *from_str = NULL, *to_str = NULL;
1002                 bool space = false;
1003
1004                 fputs("RULE=", f);
1005
1006                 if (!in_addr_is_null(rule->family, &rule->from)) {
1007                         r = in_addr_to_string(rule->family, &rule->from, &from_str);
1008                         if (r < 0)
1009                                 return r;
1010
1011                         fprintf(f, "from=%s/%hhu",
1012                                 from_str, rule->from_prefixlen);
1013                         space = true;
1014                 }
1015
1016                 if (!in_addr_is_null(rule->family, &rule->to)) {
1017                         r = in_addr_to_string(rule->family, &rule->to, &to_str);
1018                         if (r < 0)
1019                                 return r;
1020
1021                         fprintf(f, "%sto=%s/%hhu",
1022                                 space ? " " : "",
1023                                 to_str, rule->to_prefixlen);
1024                         space = true;
1025                 }
1026
1027                 if (rule->tos != 0) {
1028                         fprintf(f, "%stos=%hhu",
1029                                 space ? " " : "",
1030                                 rule->tos);
1031                         space = true;
1032                 }
1033
1034                 if (rule->fwmark != 0) {
1035                         fprintf(f, "%sfwmark=%"PRIu32"/%"PRIu32,
1036                                 space ? " " : "",
1037                                 rule->fwmark, rule->fwmask);
1038                         space = true;
1039                 }
1040
1041                 if (rule->iif) {
1042                         fprintf(f, "%siif=%s",
1043                                 space ? " " : "",
1044                                 rule->iif);
1045                         space = true;
1046                 }
1047
1048                 if (rule->oif) {
1049                         fprintf(f, "%soif=%s",
1050                                 space ? " " : "",
1051                                 rule->oif);
1052                         space = true;
1053                 }
1054
1055                 if (rule->protocol != 0) {
1056                         fprintf(f, "%sprotocol=%hhu",
1057                                 space ? " " : "",
1058                                 rule->protocol);
1059                         space = true;
1060                 }
1061
1062                 if (rule->sport.start != 0 || rule->sport.end != 0) {
1063                         fprintf(f, "%ssourcesport=%"PRIu16"-%"PRIu16,
1064                                 space ? " " : "",
1065                                 rule->sport.start, rule->sport.end);
1066                         space = true;
1067                 }
1068
1069                 if (rule->dport.start != 0 || rule->dport.end != 0) {
1070                         fprintf(f, "%sdestinationport=%"PRIu16"-%"PRIu16,
1071                                 space ? " " : "",
1072                                 rule->dport.start, rule->dport.end);
1073                         space = true;
1074                 }
1075
1076                 fprintf(f, "%stable=%"PRIu32 "\n",
1077                         space ? " " : "",
1078                         rule->table);
1079         }
1080
1081         return 0;
1082 }
1083
1084 int routing_policy_load_rules(const char *state_file, Set **rules) {
1085         _cleanup_strv_free_ char **l = NULL;
1086         _cleanup_free_ char *data = NULL;
1087         uint16_t low = 0, high = 0;
1088         const char *p;
1089         char **i;
1090         int r;
1091
1092         assert(state_file);
1093         assert(rules);
1094
1095         r = routing_policy_rule_read_full_file(state_file, &data);
1096         if (r <= 0)
1097                 return r;
1098
1099         l = strv_split_newlines(data);
1100         if (!l)
1101                 return -ENOMEM;
1102
1103         r = set_ensure_allocated(rules, &routing_policy_rule_hash_ops);
1104         if (r < 0)
1105                 return r;
1106
1107         STRV_FOREACH(i, l) {
1108                 _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *rule = NULL;
1109
1110                 p = startswith(*i, "RULE=");
1111                 if (!p)
1112                         continue;
1113
1114                 r = routing_policy_rule_new(&rule);
1115                 if (r < 0)
1116                         return r;
1117
1118                 for (;;) {
1119                         _cleanup_free_ char *word = NULL, *a = NULL, *b = NULL;
1120                         union in_addr_union buffer;
1121                         uint8_t prefixlen;
1122
1123                         r = extract_first_word(&p, &word, NULL, 0);
1124                         if (r < 0)
1125                                 return r;
1126                         if (r == 0)
1127                                 break;
1128
1129                         r = split_pair(word, "=", &a, &b);
1130                         if (r < 0)
1131                                 continue;
1132
1133                         if (STR_IN_SET(a, "from", "to")) {
1134
1135                                 r = in_addr_prefix_from_string(b, AF_INET, &buffer, &prefixlen);
1136                                 if (r < 0) {
1137                                         r = in_addr_prefix_from_string(b, AF_INET6, &buffer, &prefixlen);
1138                                         if (r < 0) {
1139                                                 log_error_errno(r, "RPDB rule prefix is invalid, ignoring assignment: %s", b);
1140                                                 continue;
1141                                         }
1142
1143                                         rule->family = AF_INET6;
1144                                 } else
1145                                         rule->family = AF_INET;
1146
1147                                 if (streq(a, "to")) {
1148                                         rule->to = buffer;
1149                                         rule->to_prefixlen = prefixlen;
1150                                 } else {
1151                                         rule->from = buffer;
1152                                         rule->from_prefixlen = prefixlen;
1153                                 }
1154                         } else if (streq(a, "tos")) {
1155                                 r = safe_atou8(b, &rule->tos);
1156                                 if (r < 0) {
1157                                         log_error_errno(r, "Failed to parse RPDB rule tos, ignoring: %s", b);
1158                                         continue;
1159                                 }
1160                         } else if (streq(a, "table")) {
1161                                 r = safe_atou32(b, &rule->table);
1162                                 if (r < 0) {
1163                                         log_error_errno(r, "Failed to parse RPDB rule table, ignoring: %s", b);
1164                                         continue;
1165                                 }
1166                         } else if (streq(a, "fwmark")) {
1167
1168                                 r = parse_fwmark_fwmask(b, &rule->fwmark, &rule->fwmask);
1169                                 if (r < 0) {
1170                                         log_error_errno(r, "Failed to parse RPDB rule firewall mark or mask, ignoring: %s", a);
1171                                         continue;
1172                                 }
1173                         } else if (streq(a, "iif")) {
1174
1175                                 if (free_and_strdup(&rule->iif, b) < 0)
1176                                         return log_oom();
1177
1178                         } else if (streq(a, "oif")) {
1179
1180                                 if (free_and_strdup(&rule->oif, b) < 0)
1181                                         return log_oom();
1182                         } else if (streq(a, "protocol")) {
1183                                 r = safe_atou8(b, &rule->protocol);
1184                                 if (r < 0) {
1185                                         log_error_errno(r, "Failed to parse RPDB rule protocol, ignoring: %s", b);
1186                                         continue;
1187                                 }
1188                         } else if (streq(a, "sourceport")) {
1189
1190                                 r = parse_ip_port_range(b, &low, &high);
1191                                 if (r < 0) {
1192                                         log_error_errno(r, "Invalid routing policy rule source port range, ignoring assignment:'%s'", b);
1193                                         continue;
1194                                 }
1195
1196                                 rule->sport.start = low;
1197                                 rule->sport.end = high;
1198
1199                         } else if (streq(a, "destinationport")) {
1200
1201                                 r = parse_ip_port_range(b, &low, &high);
1202                                 if (r < 0) {
1203                                         log_error_errno(r, "Invalid routing policy rule destination port range, ignoring assignment:'%s'", b);
1204                                         continue;
1205                                 }
1206
1207                                 rule->dport.start = low;
1208                                 rule->dport.end = high;
1209                         }
1210                 }
1211
1212                 r = set_put(*rules, rule);
1213                 if (r < 0) {
1214                         log_warning_errno(r, "Failed to add RPDB rule to saved DB, ignoring: %s", p);
1215                         continue;
1216                 }
1217
1218                 rule = NULL;
1219         }
1220
1221         return 0;
1222 }
1223
1224 void routing_policy_rule_purge(Manager *m, Link *link) {
1225         RoutingPolicyRule *rule, *existing;
1226         Iterator i;
1227         int r;
1228
1229         assert(m);
1230         assert(link);
1231
1232         SET_FOREACH(rule, m->rules_saved, i) {
1233                 existing = set_get(m->rules_foreign, rule);
1234                 if (existing) {
1235
1236                         r = routing_policy_rule_remove(rule, link, routing_policy_rule_remove_handler);
1237                         if (r < 0) {
1238                                 log_warning_errno(r, "Could not remove routing policy rules: %m");
1239                                 continue;
1240                         }
1241
1242                         link->routing_policy_rule_remove_messages++;
1243                 }
1244         }
1245 }