src/network/networkd-route.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd.
   4
   5   Copyright 2013 Tom Gundersen <teg@jklm.no>
   6 ***/
   7
   8 #include <linux/icmpv6.h>
   9
  10 #include "alloc-util.h"
  11 #include "conf-parser.h"
  12 #include "in-addr-util.h"
  13 #include "netlink-util.h"
  14 #include "networkd-manager.h"
  15 #include "networkd-route.h"
  16 #include "parse-util.h"
  17 #include "set.h"
  18 #include "string-util.h"
  19 #include "sysctl-util.h"
  20 #include "util.h"
  21
  22 #define ROUTES_DEFAULT_MAX_PER_FAMILY 4096U
  23
  24 static unsigned routes_max(void) {
  25         static thread_local unsigned cached = 0;
  26
  27         _cleanup_free_ char *s4 = NULL, *s6 = NULL;
  28         unsigned val4 = ROUTES_DEFAULT_MAX_PER_FAMILY, val6 = ROUTES_DEFAULT_MAX_PER_FAMILY;
  29
  30         if (cached > 0)
  31                 return cached;
  32
  33         if (sysctl_read("net/ipv4/route/max_size", &s4) >= 0) {
  34                 truncate_nl(s4);
  35                 if (safe_atou(s4, &val4) >= 0 &&
  36                     val4 == 2147483647U)
  37                         /* This is the default "no limit" value in the kernel */
  38                         val4 = ROUTES_DEFAULT_MAX_PER_FAMILY;
  39         }
  40
  41         if (sysctl_read("net/ipv6/route/max_size", &s6) >= 0) {
  42                 truncate_nl(s6);
  43                 (void) safe_atou(s6, &val6);
  44         }
  45
  46         cached = MAX(ROUTES_DEFAULT_MAX_PER_FAMILY, val4) +
  47                  MAX(ROUTES_DEFAULT_MAX_PER_FAMILY, val6);
  48         return cached;
  49 }
  50
  51 int route_new(Route **ret) {
  52         _cleanup_route_free_ Route *route = NULL;
  53
  54         route = new0(Route, 1);
  55         if (!route)
  56                 return -ENOMEM;
  57
  58         route->family = AF_UNSPEC;
  59         route->scope = RT_SCOPE_UNIVERSE;
  60         route->protocol = RTPROT_UNSPEC;
  61         route->type = RTN_UNICAST;
  62         route->table = RT_TABLE_MAIN;
  63         route->lifetime = USEC_INFINITY;
  64         route->quickack = -1;
  65
  66         *ret = TAKE_PTR(route);
  67
  68         return 0;
  69 }
  70
  71 int route_new_static(Network *network, const char *filename, unsigned section_line, Route **ret) {
  72         _cleanup_network_config_section_free_ NetworkConfigSection *n = NULL;
  73         _cleanup_route_free_ Route *route = NULL;
  74         int r;
  75
  76         assert(network);
  77         assert(ret);
  78         assert(!!filename == (section_line > 0));
  79
  80         if (filename) {
  81                 r = network_config_section_new(filename, section_line, &n);
  82                 if (r < 0)
  83                         return r;
  84
  85                 route = hashmap_get(network->routes_by_section, n);
  86                 if (route) {
  87                         *ret = TAKE_PTR(route);
  88
  89                         return 0;
  90                 }
  91         }
  92
  93         if (network->n_static_routes >= routes_max())
  94                 return -E2BIG;
  95
  96         r = route_new(&route);
  97         if (r < 0)
  98                 return r;
  99
 100         route->protocol = RTPROT_STATIC;
 101
 102         if (filename) {
 103                 route->section = TAKE_PTR(n);
 104
 105                 r = hashmap_put(network->routes_by_section, route->section, route);
 106                 if (r < 0)
 107                         return r;
 108         }
 109
 110         route->network = network;
 111         LIST_PREPEND(routes, network->static_routes, route);
 112         network->n_static_routes++;
 113
 114         *ret = TAKE_PTR(route);
 115
 116         return 0;
 117 }
 118
 119 void route_free(Route *route) {
 120         if (!route)
 121                 return;
 122
 123         if (route->network) {
 124                 LIST_REMOVE(routes, route->network->static_routes, route);
 125
 126                 assert(route->network->n_static_routes > 0);
 127                 route->network->n_static_routes--;
 128
 129                 if (route->section)
 130                         hashmap_remove(route->network->routes_by_section, route->section);
 131         }
 132
 133         network_config_section_free(route->section);
 134
 135         if (route->link) {
 136                 set_remove(route->link->routes, route);
 137                 set_remove(route->link->routes_foreign, route);
 138         }
 139
 140         sd_event_source_unref(route->expire);
 141
 142         free(route);
 143 }
 144
 145 static void route_hash_func(const void *b, struct siphash *state) {
 146         const Route *route = b;
 147
 148         assert(route);
 149
 150         siphash24_compress(&route->family, sizeof(route->family), state);
 151
 152         switch (route->family) {
 153         case AF_INET:
 154         case AF_INET6:
 155                 /* Equality of routes are given by the 4-touple
 156                    (dst_prefix,dst_prefixlen,tos,priority,table) */
 157                 siphash24_compress(&route->dst, FAMILY_ADDRESS_SIZE(route->family), state);
 158                 siphash24_compress(&route->dst_prefixlen, sizeof(route->dst_prefixlen), state);
 159                 siphash24_compress(&route->tos, sizeof(route->tos), state);
 160                 siphash24_compress(&route->priority, sizeof(route->priority), state);
 161                 siphash24_compress(&route->table, sizeof(route->table), state);
 162
 163                 break;
 164         default:
 165                 /* treat any other address family as AF_UNSPEC */
 166                 break;
 167         }
 168 }
 169
 170 static int route_compare_func(const void *_a, const void *_b) {
 171         const Route *a = _a, *b = _b;
 172
 173         if (a->family < b->family)
 174                 return -1;
 175         if (a->family > b->family)
 176                 return 1;
 177
 178         switch (a->family) {
 179         case AF_INET:
 180         case AF_INET6:
 181                 if (a->dst_prefixlen < b->dst_prefixlen)
 182                         return -1;
 183                 if (a->dst_prefixlen > b->dst_prefixlen)
 184                         return 1;
 185
 186                 if (a->tos < b->tos)
 187                         return -1;
 188                 if (a->tos > b->tos)
 189                         return 1;
 190
 191                 if (a->priority < b->priority)
 192                         return -1;
 193                 if (a->priority > b->priority)
 194                         return 1;
 195
 196                 if (a->table < b->table)
 197                         return -1;
 198                 if (a->table > b->table)
 199                         return 1;
 200
 201                 return memcmp(&a->dst, &b->dst, FAMILY_ADDRESS_SIZE(a->family));
 202         default:
 203                 /* treat any other address family as AF_UNSPEC */
 204                 return 0;
 205         }
 206 }
 207
 208 static const struct hash_ops route_hash_ops = {
 209         .hash = route_hash_func,
 210         .compare = route_compare_func
 211 };
 212
 213 int route_get(Link *link,
 214               int family,
 215               const union in_addr_union *dst,
 216               unsigned char dst_prefixlen,
 217               unsigned char tos,
 218               uint32_t priority,
 219               uint32_t table,
 220               Route **ret) {
 221
 222         Route route, *existing;
 223
 224         assert(link);
 225         assert(dst);
 226
 227         route = (Route) {
 228                 .family = family,
 229                 .dst = *dst,
 230                 .dst_prefixlen = dst_prefixlen,
 231                 .tos = tos,
 232                 .priority = priority,
 233                 .table = table,
 234         };
 235
 236         existing = set_get(link->routes, &route);
 237         if (existing) {
 238                 if (ret)
 239                         *ret = existing;
 240                 return 1;
 241         }
 242
 243         existing = set_get(link->routes_foreign, &route);
 244         if (existing) {
 245                 if (ret)
 246                         *ret = existing;
 247                 return 0;
 248         }
 249
 250         return -ENOENT;
 251 }
 252
 253 static int route_add_internal(
 254                 Link *link,
 255                 Set **routes,
 256                 int family,
 257                 const union in_addr_union *dst,
 258                 unsigned char dst_prefixlen,
 259                 unsigned char tos,
 260                 uint32_t priority,
 261                 uint32_t table,
 262                 Route **ret) {
 263
 264         _cleanup_route_free_ Route *route = NULL;
 265         int r;
 266
 267         assert(link);
 268         assert(routes);
 269         assert(dst);
 270
 271         r = route_new(&route);
 272         if (r < 0)
 273                 return r;
 274
 275         route->family = family;
 276         route->dst = *dst;
 277         route->dst_prefixlen = dst_prefixlen;
 278         route->tos = tos;
 279         route->priority = priority;
 280         route->table = table;
 281
 282         r = set_ensure_allocated(routes, &route_hash_ops);
 283         if (r < 0)
 284                 return r;
 285
 286         r = set_put(*routes, route);
 287         if (r < 0)
 288                 return r;
 289
 290         route->link = link;
 291
 292         if (ret)
 293                 *ret = route;
 294
 295         route = NULL;
 296
 297         return 0;
 298 }
 299
 300 int route_add_foreign(
 301                 Link *link,
 302                 int family,
 303                 const union in_addr_union *dst,
 304                 unsigned char dst_prefixlen,
 305                 unsigned char tos,
 306                 uint32_t priority,
 307                 uint32_t table,
 308                 Route **ret) {
 309
 310         return route_add_internal(link, &link->routes_foreign, family, dst, dst_prefixlen, tos, priority, table, ret);
 311 }
 312
 313 int route_add(
 314               Link *link,
 315               int family,
 316               const union in_addr_union *dst,
 317               unsigned char dst_prefixlen,
 318               unsigned char tos,
 319               uint32_t priority,
 320               uint32_t table,
 321               Route **ret) {
 322
 323         Route *route;
 324         int r;
 325
 326         r = route_get(link, family, dst, dst_prefixlen, tos, priority, table, &route);
 327         if (r == -ENOENT) {
 328                 /* Route does not exist, create a new one */
 329                 r = route_add_internal(link, &link->routes, family, dst, dst_prefixlen, tos, priority, table, &route);
 330                 if (r < 0)
 331                         return r;
 332         } else if (r == 0) {
 333                 /* Take over a foreign route */
 334                 r = set_ensure_allocated(&link->routes, &route_hash_ops);
 335                 if (r < 0)
 336                         return r;
 337
 338                 r = set_put(link->routes, route);
 339                 if (r < 0)
 340                         return r;
 341
 342                 set_remove(link->routes_foreign, route);
 343         } else if (r == 1) {
 344                 /* Route exists, do nothing */
 345                 ;
 346         } else
 347                 return r;
 348
 349         if (ret)
 350                 *ret = route;
 351
 352         return 0;
 353 }
 354
 355 void route_update(Route *route,
 356                  const union in_addr_union *src,
 357                  unsigned char src_prefixlen,
 358                  const union in_addr_union *gw,
 359                  const union in_addr_union *prefsrc,
 360                  unsigned char scope,
 361                  unsigned char protocol,
 362                  unsigned char type) {
 363
 364         assert(route);
 365         assert(src);
 366         assert(gw);
 367         assert(prefsrc);
 368
 369         route->src = *src;
 370         route->src_prefixlen = src_prefixlen;
 371         route->gw = *gw;
 372         route->prefsrc = *prefsrc;
 373         route->scope = scope;
 374         route->protocol = protocol;
 375         route->type = type;
 376 }
 377
 378 int route_remove(Route *route, Link *link,
 379                sd_netlink_message_handler_t callback) {
 380         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
 381         int r;
 382
 383         assert(link);
 384         assert(link->manager);
 385         assert(link->manager->rtnl);
 386         assert(link->ifindex > 0);
 387         assert(IN_SET(route->family, AF_INET, AF_INET6));
 388
 389         r = sd_rtnl_message_new_route(link->manager->rtnl, &req,
 390                                       RTM_DELROUTE, route->family,
 391                                       route->protocol);
 392         if (r < 0)
 393                 return log_error_errno(r, "Could not create RTM_DELROUTE message: %m");
 394
 395         if (!in_addr_is_null(route->family, &route->gw)) {
 396                 if (route->family == AF_INET)
 397                         r = sd_netlink_message_append_in_addr(req, RTA_GATEWAY, &route->gw.in);
 398                 else if (route->family == AF_INET6)
 399                         r = sd_netlink_message_append_in6_addr(req, RTA_GATEWAY, &route->gw.in6);
 400                 if (r < 0)
 401                         return log_error_errno(r, "Could not append RTA_GATEWAY attribute: %m");
 402         }
 403
 404         if (route->dst_prefixlen) {
 405                 if (route->family == AF_INET)
 406                         r = sd_netlink_message_append_in_addr(req, RTA_DST, &route->dst.in);
 407                 else if (route->family == AF_INET6)
 408                         r = sd_netlink_message_append_in6_addr(req, RTA_DST, &route->dst.in6);
 409                 if (r < 0)
 410                         return log_error_errno(r, "Could not append RTA_DST attribute: %m");
 411
 412                 r = sd_rtnl_message_route_set_dst_prefixlen(req, route->dst_prefixlen);
 413                 if (r < 0)
 414                         return log_error_errno(r, "Could not set destination prefix length: %m");
 415         }
 416
 417         if (route->src_prefixlen) {
 418                 if (route->family == AF_INET)
 419                         r = sd_netlink_message_append_in_addr(req, RTA_SRC, &route->src.in);
 420                 else if (route->family == AF_INET6)
 421                         r = sd_netlink_message_append_in6_addr(req, RTA_SRC, &route->src.in6);
 422                 if (r < 0)
 423                         return log_error_errno(r, "Could not append RTA_SRC attribute: %m");
 424
 425                 r = sd_rtnl_message_route_set_src_prefixlen(req, route->src_prefixlen);
 426                 if (r < 0)
 427                         return log_error_errno(r, "Could not set source prefix length: %m");
 428         }
 429
 430         if (!in_addr_is_null(route->family, &route->prefsrc)) {
 431                 if (route->family == AF_INET)
 432                         r = sd_netlink_message_append_in_addr(req, RTA_PREFSRC, &route->prefsrc.in);
 433                 else if (route->family == AF_INET6)
 434                         r = sd_netlink_message_append_in6_addr(req, RTA_PREFSRC, &route->prefsrc.in6);
 435                 if (r < 0)
 436                         return log_error_errno(r, "Could not append RTA_PREFSRC attribute: %m");
 437         }
 438
 439         r = sd_rtnl_message_route_set_scope(req, route->scope);
 440         if (r < 0)
 441                 return log_error_errno(r, "Could not set scope: %m");
 442
 443         r = sd_netlink_message_append_u32(req, RTA_PRIORITY, route->priority);
 444         if (r < 0)
 445                 return log_error_errno(r, "Could not append RTA_PRIORITY attribute: %m");
 446
 447         if (!IN_SET(route->type, RTN_UNREACHABLE, RTN_PROHIBIT, RTN_BLACKHOLE)) {
 448                 r = sd_netlink_message_append_u32(req, RTA_OIF, link->ifindex);
 449                 if (r < 0)
 450                         return log_error_errno(r, "Could not append RTA_OIF attribute: %m");
 451         }
 452
 453         r = sd_netlink_call_async(link->manager->rtnl, req, callback, link, 0, NULL);
 454         if (r < 0)
 455                 return log_error_errno(r, "Could not send rtnetlink message: %m");
 456
 457         link_ref(link);
 458
 459         return 0;
 460 }
 461
 462 static int route_expire_callback(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
 463         Link *link = userdata;
 464         int r;
 465
 466         assert(rtnl);
 467         assert(m);
 468         assert(link);
 469         assert(link->ifname);
 470
 471         if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
 472                 return 1;
 473
 474         r = sd_netlink_message_get_errno(m);
 475         if (r < 0 && r != -EEXIST)
 476                 log_link_warning_errno(link, r, "could not remove route: %m");
 477
 478         return 1;
 479 }
 480
 481 int route_expire_handler(sd_event_source *s, uint64_t usec, void *userdata) {
 482         Route *route = userdata;
 483         int r;
 484
 485         assert(route);
 486
 487         r = route_remove(route, route->link, route_expire_callback);
 488         if (r < 0)
 489                 log_warning_errno(r, "Could not remove route: %m");
 490         else
 491                 route_free(route);
 492
 493         return 1;
 494 }
 495
 496 int route_configure(
 497                 Route *route,
 498                 Link *link,
 499                 sd_netlink_message_handler_t callback) {
 500
 501         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
 502         _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
 503         usec_t lifetime;
 504         int r;
 505
 506         assert(link);
 507         assert(link->manager);
 508         assert(link->manager->rtnl);
 509         assert(link->ifindex > 0);
 510         assert(IN_SET(route->family, AF_INET, AF_INET6));
 511
 512         if (route_get(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL) <= 0 &&
 513             set_size(link->routes) >= routes_max())
 514                 return -E2BIG;
 515
 516         r = sd_rtnl_message_new_route(link->manager->rtnl, &req,
 517                                       RTM_NEWROUTE, route->family,
 518                                       route->protocol);
 519         if (r < 0)
 520                 return log_error_errno(r, "Could not create RTM_NEWROUTE message: %m");
 521
 522         if (!in_addr_is_null(route->family, &route->gw)) {
 523                 if (route->family == AF_INET)
 524                         r = sd_netlink_message_append_in_addr(req, RTA_GATEWAY, &route->gw.in);
 525                 else if (route->family == AF_INET6)
 526                         r = sd_netlink_message_append_in6_addr(req, RTA_GATEWAY, &route->gw.in6);
 527                 if (r < 0)
 528                         return log_error_errno(r, "Could not append RTA_GATEWAY attribute: %m");
 529
 530                 r = sd_rtnl_message_route_set_family(req, route->family);
 531                 if (r < 0)
 532                         return log_error_errno(r, "Could not set route family: %m");
 533         }
 534
 535         if (route->dst_prefixlen) {
 536                 if (route->family == AF_INET)
 537                         r = sd_netlink_message_append_in_addr(req, RTA_DST, &route->dst.in);
 538                 else if (route->family == AF_INET6)
 539                         r = sd_netlink_message_append_in6_addr(req, RTA_DST, &route->dst.in6);
 540                 if (r < 0)
 541                         return log_error_errno(r, "Could not append RTA_DST attribute: %m");
 542
 543                 r = sd_rtnl_message_route_set_dst_prefixlen(req, route->dst_prefixlen);
 544                 if (r < 0)
 545                         return log_error_errno(r, "Could not set destination prefix length: %m");
 546         }
 547
 548         if (route->src_prefixlen) {
 549                 if (route->family == AF_INET)
 550                         r = sd_netlink_message_append_in_addr(req, RTA_SRC, &route->src.in);
 551                 else if (route->family == AF_INET6)
 552                         r = sd_netlink_message_append_in6_addr(req, RTA_SRC, &route->src.in6);
 553                 if (r < 0)
 554                         return log_error_errno(r, "Could not append RTA_SRC attribute: %m");
 555
 556                 r = sd_rtnl_message_route_set_src_prefixlen(req, route->src_prefixlen);
 557                 if (r < 0)
 558                         return log_error_errno(r, "Could not set source prefix length: %m");
 559         }
 560
 561         if (!in_addr_is_null(route->family, &route->prefsrc)) {
 562                 if (route->family == AF_INET)
 563                         r = sd_netlink_message_append_in_addr(req, RTA_PREFSRC, &route->prefsrc.in);
 564                 else if (route->family == AF_INET6)
 565                         r = sd_netlink_message_append_in6_addr(req, RTA_PREFSRC, &route->prefsrc.in6);
 566                 if (r < 0)
 567                         return log_error_errno(r, "Could not append RTA_PREFSRC attribute: %m");
 568         }
 569
 570         r = sd_rtnl_message_route_set_scope(req, route->scope);
 571         if (r < 0)
 572                 return log_error_errno(r, "Could not set scope: %m");
 573
 574         r = sd_rtnl_message_route_set_flags(req, route->flags);
 575         if (r < 0)
 576                 return log_error_errno(r, "Could not set flags: %m");
 577
 578         if (route->table != RT_TABLE_MAIN) {
 579                 if (route->table < 256) {
 580                         r = sd_rtnl_message_route_set_table(req, route->table);
 581                         if (r < 0)
 582                                 return log_error_errno(r, "Could not set route table: %m");
 583                 } else {
 584                         r = sd_rtnl_message_route_set_table(req, RT_TABLE_UNSPEC);
 585                         if (r < 0)
 586                                 return log_error_errno(r, "Could not set route table: %m");
 587
 588                         /* Table attribute to allow more than 256. */
 589                         r = sd_netlink_message_append_data(req, RTA_TABLE, &route->table, sizeof(route->table));
 590                         if (r < 0)
 591                                 return log_error_errno(r, "Could not append RTA_TABLE attribute: %m");
 592                 }
 593         }
 594
 595         r = sd_netlink_message_append_u32(req, RTA_PRIORITY, route->priority);
 596         if (r < 0)
 597                 return log_error_errno(r, "Could not append RTA_PRIORITY attribute: %m");
 598
 599         r = sd_netlink_message_append_u8(req, RTA_PREF, route->pref);
 600         if (r < 0)
 601                 return log_error_errno(r, "Could not append RTA_PREF attribute: %m");
 602
 603         if (route->lifetime != USEC_INFINITY && kernel_route_expiration_supported()) {
 604                 r = sd_netlink_message_append_u32(req, RTA_EXPIRES,
 605                         DIV_ROUND_UP(usec_sub_unsigned(route->lifetime, now(clock_boottime_or_monotonic())), USEC_PER_SEC));
 606                 if (r < 0)
 607                         return log_error_errno(r, "Could not append RTA_EXPIRES attribute: %m");
 608         }
 609
 610         r = sd_rtnl_message_route_set_type(req, route->type);
 611         if (r < 0)
 612                 return log_error_errno(r, "Could not set route type: %m");
 613
 614         if (!IN_SET(route->type, RTN_UNREACHABLE, RTN_PROHIBIT, RTN_BLACKHOLE)) {
 615                 r = sd_netlink_message_append_u32(req, RTA_OIF, link->ifindex);
 616                 if (r < 0)
 617                         return log_error_errno(r, "Could not append RTA_OIF attribute: %m");
 618         }
 619
 620         r = sd_netlink_message_open_container(req, RTA_METRICS);
 621         if (r < 0)
 622                 return log_error_errno(r, "Could not append RTA_METRICS attribute: %m");
 623
 624         if (route->mtu > 0) {
 625                 r = sd_netlink_message_append_u32(req, RTAX_MTU, route->mtu);
 626                 if (r < 0)
 627                         return log_error_errno(r, "Could not append RTAX_MTU attribute: %m");
 628         }
 629
 630         if (route->initcwnd > 0) {
 631                 r = sd_netlink_message_append_u32(req, RTAX_INITCWND, route->initcwnd);
 632                 if (r < 0)
 633                         return log_error_errno(r, "Could not append RTAX_INITCWND attribute: %m");
 634         }
 635
 636         if (route->initrwnd > 0) {
 637                 r = sd_netlink_message_append_u32(req, RTAX_INITRWND, route->initrwnd);
 638                 if (r < 0)
 639                         return log_error_errno(r, "Could not append RTAX_INITRWND attribute: %m");
 640         }
 641
 642         if (route->quickack != -1) {
 643                 r = sd_netlink_message_append_u32(req, RTAX_QUICKACK, route->quickack);
 644                 if (r < 0)
 645                         return log_error_errno(r, "Could not append RTAX_QUICKACK attribute: %m");
 646         }
 647
 648         r = sd_netlink_message_close_container(req);
 649         if (r < 0)
 650                 return log_error_errno(r, "Could not append RTA_METRICS attribute: %m");
 651
 652         r = sd_netlink_call_async(link->manager->rtnl, req, callback, link, 0, NULL);
 653         if (r < 0)
 654                 return log_error_errno(r, "Could not send rtnetlink message: %m");
 655
 656         link_ref(link);
 657
 658         lifetime = route->lifetime;
 659
 660         r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, &route);
 661         if (r < 0)
 662                 return log_error_errno(r, "Could not add route: %m");
 663
 664         /* TODO: drop expiration handling once it can be pushed into the kernel */
 665         route->lifetime = lifetime;
 666
 667         if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
 668                 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(),
 669                                       route->lifetime, 0, route_expire_handler, route);
 670                 if (r < 0)
 671                         return log_error_errno(r, "Could not arm expiration timer: %m");
 672         }
 673
 674         sd_event_source_unref(route->expire);
 675         route->expire = TAKE_PTR(expire);
 676
 677         return 0;
 678 }
 679
 680 int config_parse_gateway(const char *unit,
 681                 const char *filename,
 682                 unsigned line,
 683                 const char *section,
 684                 unsigned section_line,
 685                 const char *lvalue,
 686                 int ltype,
 687                 const char *rvalue,
 688                 void *data,
 689                 void *userdata) {
 690
 691         Network *network = userdata;
 692         _cleanup_route_free_ Route *n = NULL;
 693         union in_addr_union buffer;
 694         int r, f;
 695
 696         assert(filename);
 697         assert(section);
 698         assert(lvalue);
 699         assert(rvalue);
 700         assert(data);
 701
 702         if (streq(section, "Network")) {
 703                 /* we are not in an Route section, so treat
 704                  * this as the special '0' section */
 705                 r = route_new_static(network, NULL, 0, &n);
 706         } else
 707                 r = route_new_static(network, filename, section_line, &n);
 708
 709         if (r < 0)
 710                 return r;
 711
 712         r = in_addr_from_string_auto(rvalue, &f, &buffer);
 713         if (r < 0) {
 714                 log_syntax(unit, LOG_ERR, filename, line, r, "Route is invalid, ignoring assignment: %s", rvalue);
 715                 return 0;
 716         }
 717
 718         n->family = f;
 719         n->gw = buffer;
 720         n = NULL;
 721
 722         return 0;
 723 }
 724
 725 int config_parse_preferred_src(const char *unit,
 726                 const char *filename,
 727                 unsigned line,
 728                 const char *section,
 729                 unsigned section_line,
 730                 const char *lvalue,
 731                 int ltype,
 732                 const char *rvalue,
 733                 void *data,
 734                 void *userdata) {
 735
 736         Network *network = userdata;
 737         _cleanup_route_free_ Route *n = NULL;
 738         union in_addr_union buffer;
 739         int r, f;
 740
 741         assert(filename);
 742         assert(section);
 743         assert(lvalue);
 744         assert(rvalue);
 745         assert(data);
 746
 747         r = route_new_static(network, filename, section_line, &n);
 748         if (r < 0)
 749                 return r;
 750
 751         r = in_addr_from_string_auto(rvalue, &f, &buffer);
 752         if (r < 0) {
 753                 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
 754                            "Preferred source is invalid, ignoring assignment: %s", rvalue);
 755                 return 0;
 756         }
 757
 758         n->family = f;
 759         n->prefsrc = buffer;
 760         n = NULL;
 761
 762         return 0;
 763 }
 764
 765 int config_parse_destination(const char *unit,
 766                 const char *filename,
 767                 unsigned line,
 768                 const char *section,
 769                 unsigned section_line,
 770                 const char *lvalue,
 771                 int ltype,
 772                 const char *rvalue,
 773                 void *data,
 774                 void *userdata) {
 775
 776         Network *network = userdata;
 777         _cleanup_route_free_ Route *n = NULL;
 778         union in_addr_union buffer;
 779         unsigned char prefixlen;
 780         int r;
 781
 782         assert(filename);
 783         assert(section);
 784         assert(lvalue);
 785         assert(rvalue);
 786         assert(data);
 787
 788         r = route_new_static(network, filename, section_line, &n);
 789         if (r < 0)
 790                 return r;
 791
 792         r = in_addr_prefix_from_string(rvalue, AF_INET, &buffer, &prefixlen);
 793         if (r < 0) {
 794                 r = in_addr_prefix_from_string(rvalue, AF_INET6, &buffer, &prefixlen);
 795                 if (r < 0) {
 796                         log_syntax(unit, LOG_ERR, filename, line, r,
 797                                    "Route %s= prefix is invalid, ignoring assignment: %s",
 798                                    lvalue, rvalue);
 799                         return 0;
 800                 }
 801
 802                 n->family = AF_INET6;
 803         } else
 804                 n->family = AF_INET;
 805
 806         if (streq(lvalue, "Destination")) {
 807                 n->dst = buffer;
 808                 n->dst_prefixlen = prefixlen;
 809         } else if (streq(lvalue, "Source")) {
 810                 n->src = buffer;
 811                 n->src_prefixlen = prefixlen;
 812         } else
 813                 assert_not_reached(lvalue);
 814
 815         n = NULL;
 816
 817         return 0;
 818 }
 819
 820 int config_parse_route_priority(const char *unit,
 821                                 const char *filename,
 822                                 unsigned line,
 823                                 const char *section,
 824                                 unsigned section_line,
 825                                 const char *lvalue,
 826                                 int ltype,
 827                                 const char *rvalue,
 828                                 void *data,
 829                                 void *userdata) {
 830         Network *network = userdata;
 831         _cleanup_route_free_ Route *n = NULL;
 832         uint32_t k;
 833         int r;
 834
 835         assert(filename);
 836         assert(section);
 837         assert(lvalue);
 838         assert(rvalue);
 839         assert(data);
 840
 841         r = route_new_static(network, filename, section_line, &n);
 842         if (r < 0)
 843                 return r;
 844
 845         r = safe_atou32(rvalue, &k);
 846         if (r < 0) {
 847                 log_syntax(unit, LOG_ERR, filename, line, r,
 848                            "Could not parse route priority \"%s\", ignoring assignment: %m", rvalue);
 849                 return 0;
 850         }
 851
 852         n->priority = k;
 853         n = NULL;
 854
 855         return 0;
 856 }
 857
 858 int config_parse_route_scope(const char *unit,
 859                              const char *filename,
 860                              unsigned line,
 861                              const char *section,
 862                              unsigned section_line,
 863                              const char *lvalue,
 864                              int ltype,
 865                              const char *rvalue,
 866                              void *data,
 867                              void *userdata) {
 868         Network *network = userdata;
 869         _cleanup_route_free_ Route *n = NULL;
 870         int r;
 871
 872         assert(filename);
 873         assert(section);
 874         assert(lvalue);
 875         assert(rvalue);
 876         assert(data);
 877
 878         r = route_new_static(network, filename, section_line, &n);
 879         if (r < 0)
 880                 return r;
 881
 882         if (streq(rvalue, "host"))
 883                 n->scope = RT_SCOPE_HOST;
 884         else if (streq(rvalue, "link"))
 885                 n->scope = RT_SCOPE_LINK;
 886         else if (streq(rvalue, "global"))
 887                 n->scope = RT_SCOPE_UNIVERSE;
 888         else {
 889                 log_syntax(unit, LOG_ERR, filename, line, 0, "Unknown route scope: %s", rvalue);
 890                 return 0;
 891         }
 892
 893         n = NULL;
 894
 895         return 0;
 896 }
 897
 898 int config_parse_route_table(const char *unit,
 899                              const char *filename,
 900                              unsigned line,
 901                              const char *section,
 902                              unsigned section_line,
 903                              const char *lvalue,
 904                              int ltype,
 905                              const char *rvalue,
 906                              void *data,
 907                              void *userdata) {
 908         _cleanup_route_free_ Route *n = NULL;
 909         Network *network = userdata;
 910         uint32_t k;
 911         int r;
 912
 913         assert(filename);
 914         assert(section);
 915         assert(lvalue);
 916         assert(rvalue);
 917         assert(data);
 918
 919         r = route_new_static(network, filename, section_line, &n);
 920         if (r < 0)
 921                 return r;
 922
 923         r = safe_atou32(rvalue, &k);
 924         if (r < 0) {
 925                 log_syntax(unit, LOG_ERR, filename, line, r,
 926                            "Could not parse route table number \"%s\", ignoring assignment: %m", rvalue);
 927                 return 0;
 928         }
 929
 930         n->table = k;
 931
 932         n = NULL;
 933
 934         return 0;
 935 }
 936
 937 int config_parse_gateway_onlink(const char *unit,
 938                                 const char *filename,
 939                                 unsigned line,
 940                                 const char *section,
 941                                 unsigned section_line,
 942                                 const char *lvalue,
 943                                 int ltype,
 944                                 const char *rvalue,
 945                                 void *data,
 946                                 void *userdata) {
 947         Network *network = userdata;
 948         _cleanup_route_free_ Route *n = NULL;
 949         int r;
 950
 951         assert(filename);
 952         assert(section);
 953         assert(lvalue);
 954         assert(rvalue);
 955         assert(data);
 956
 957         r = route_new_static(network, filename, section_line, &n);
 958         if (r < 0)
 959                 return r;
 960
 961         r = parse_boolean(rvalue);
 962         if (r < 0) {
 963                 log_syntax(unit, LOG_ERR, filename, line, r,
 964                            "Could not parse gateway onlink \"%s\", ignoring assignment: %m", rvalue);
 965                 return 0;
 966         }
 967
 968         SET_FLAG(n->flags, RTNH_F_ONLINK, r);
 969         n = NULL;
 970
 971         return 0;
 972 }
 973
 974 int config_parse_ipv6_route_preference(const char *unit,
 975                                        const char *filename,
 976                                        unsigned line,
 977                                        const char *section,
 978                                        unsigned section_line,
 979                                        const char *lvalue,
 980                                        int ltype,
 981                                        const char *rvalue,
 982                                        void *data,
 983                                        void *userdata) {
 984         Network *network = userdata;
 985         _cleanup_route_free_ Route *n = NULL;
 986         int r;
 987
 988         r = route_new_static(network, filename, section_line, &n);
 989         if (r < 0)
 990                 return r;
 991
 992         if (streq(rvalue, "low"))
 993                 n->pref = ICMPV6_ROUTER_PREF_LOW;
 994         else if (streq(rvalue, "medium"))
 995                 n->pref = ICMPV6_ROUTER_PREF_MEDIUM;
 996         else if (streq(rvalue, "high"))
 997                 n->pref = ICMPV6_ROUTER_PREF_HIGH;
 998         else {
 999                 log_syntax(unit, LOG_ERR, filename, line, 0, "Unknown route preference: %s", rvalue);
1000                 return 0;
1001         }
1002
1003         n = NULL;
1004
1005         return 0;
1006 }
1007
1008 int config_parse_route_protocol(const char *unit,
1009                                 const char *filename,
1010                                 unsigned line,
1011                                 const char *section,
1012                                 unsigned section_line,
1013                                 const char *lvalue,
1014                                 int ltype,
1015                                 const char *rvalue,
1016                                 void *data,
1017                                 void *userdata) {
1018         Network *network = userdata;
1019         _cleanup_route_free_ Route *n = NULL;
1020         int r;
1021
1022         r = route_new_static(network, filename, section_line, &n);
1023         if (r < 0)
1024                 return r;
1025
1026         if (streq(rvalue, "kernel"))
1027                 n->protocol = RTPROT_KERNEL;
1028         else if (streq(rvalue, "boot"))
1029                 n->protocol = RTPROT_BOOT;
1030         else if (streq(rvalue, "static"))
1031                 n->protocol = RTPROT_STATIC;
1032         else {
1033                 r = safe_atou8(rvalue , &n->protocol);
1034                 if (r < 0) {
1035                         log_syntax(unit, LOG_ERR, filename, line, r, "Could not parse route protocol \"%s\", ignoring assignment: %m", rvalue);
1036                         return 0;
1037                 }
1038         }
1039
1040         n = NULL;
1041
1042         return 0;
1043 }
1044
1045 int config_parse_route_type(const char *unit,
1046                             const char *filename,
1047                             unsigned line,
1048                             const char *section,
1049                             unsigned section_line,
1050                             const char *lvalue,
1051                             int ltype,
1052                             const char *rvalue,
1053                             void *data,
1054                             void *userdata) {
1055         Network *network = userdata;
1056         _cleanup_route_free_ Route *n = NULL;
1057         int r;
1058
1059         r = route_new_static(network, filename, section_line, &n);
1060         if (r < 0)
1061                 return r;
1062
1063         if (streq(rvalue, "unicast"))
1064                 n->type = RTN_UNICAST;
1065         else if (streq(rvalue, "blackhole"))
1066                 n->type = RTN_BLACKHOLE;
1067         else if (streq(rvalue, "unreachable"))
1068                 n->type = RTN_UNREACHABLE;
1069         else if (streq(rvalue, "prohibit"))
1070                 n->type = RTN_PROHIBIT;
1071         else {
1072                 log_syntax(unit, LOG_ERR, filename, line, r, "Could not parse route type \"%s\", ignoring assignment: %m", rvalue);
1073                 return 0;
1074         }
1075
1076         n = NULL;
1077
1078         return 0;
1079 }
1080
1081 int config_parse_tcp_window(const char *unit,
1082                              const char *filename,
1083                              unsigned line,
1084                              const char *section,
1085                              unsigned section_line,
1086                              const char *lvalue,
1087                              int ltype,
1088                              const char *rvalue,
1089                              void *data,
1090                              void *userdata) {
1091         _cleanup_route_free_ Route *n = NULL;
1092         Network *network = userdata;
1093         uint64_t k;
1094         int r;
1095
1096         assert(filename);
1097         assert(section);
1098         assert(lvalue);
1099         assert(rvalue);
1100         assert(data);
1101
1102         r = route_new_static(network, filename, section_line, &n);
1103         if (r < 0)
1104                 return r;
1105
1106         r = parse_size(rvalue, 1024, &k);
1107         if (r < 0 || k > UINT32_MAX)  {
1108                 log_syntax(unit, LOG_ERR, filename, line, r,
1109                            "Could not parse TCP %s \"%s\" bytes, ignoring assignment: %m", rvalue, lvalue);
1110                 return 0;
1111         }
1112
1113         if (streq(lvalue, "InitialCongestionWindow"))
1114                 n->initcwnd = k;
1115         else if (streq(lvalue, "InitialAdvertisedReceiveWindow"))
1116                 n->initrwnd = k;
1117         else {
1118                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse TCP %s: %s", lvalue, rvalue);
1119                 return 0;
1120         }
1121
1122         n = NULL;
1123
1124         return 0;
1125 }
1126
1127 int config_parse_quickack(const char *unit,
1128                           const char *filename,
1129                           unsigned line,
1130                           const char *section,
1131                           unsigned section_line,
1132                           const char *lvalue,
1133                           int ltype,
1134                           const char *rvalue,
1135                           void *data,
1136                           void *userdata) {
1137         _cleanup_route_free_ Route *n = NULL;
1138         Network *network = userdata;
1139         int k, r;
1140
1141         assert(filename);
1142         assert(section);
1143         assert(lvalue);
1144         assert(rvalue);
1145         assert(data);
1146
1147         r = route_new_static(network, filename, section_line, &n);
1148         if (r < 0)
1149                 return r;
1150
1151         k = parse_boolean(rvalue);
1152         if (k < 0) {
1153                 log_syntax(unit, LOG_ERR, filename, line, k, "Failed to parse TCP quickack, ignoring: %s", rvalue);
1154                 return 0;
1155         }
1156
1157         n->quickack = !!k;
1158         n = NULL;
1159
1160         return 0;
1161 }