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_freep) 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_freep) NetworkConfigSection *n = NULL;
  73         _cleanup_(route_freep) 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_freep) 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(Link *link,
 314               int family,
 315               const union in_addr_union *dst,
 316               unsigned char dst_prefixlen,
 317               unsigned char tos,
 318               uint32_t priority,
 319               uint32_t table,
 320               Route **ret) {
 321
 322         Route *route;
 323         int r;
 324
 325         r = route_get(link, family, dst, dst_prefixlen, tos, priority, table, &route);
 326         if (r == -ENOENT) {
 327                 /* Route does not exist, create a new one */
 328                 r = route_add_internal(link, &link->routes, family, dst, dst_prefixlen, tos, priority, table, &route);
 329                 if (r < 0)
 330                         return r;
 331         } else if (r == 0) {
 332                 /* Take over a foreign route */
 333                 r = set_ensure_allocated(&link->routes, &route_hash_ops);
 334                 if (r < 0)
 335                         return r;
 336
 337                 r = set_put(link->routes, route);
 338                 if (r < 0)
 339                         return r;
 340
 341                 set_remove(link->routes_foreign, route);
 342         } else if (r == 1) {
 343                 /* Route exists, do nothing */
 344                 ;
 345         } else
 346                 return r;
 347
 348         if (ret)
 349                 *ret = route;
 350
 351         return 0;
 352 }
 353
 354 void route_update(Route *route,
 355                   const union in_addr_union *src,
 356                   unsigned char src_prefixlen,
 357                   const union in_addr_union *gw,
 358                   const union in_addr_union *prefsrc,
 359                   unsigned char scope,
 360                   unsigned char protocol,
 361                   unsigned char type) {
 362
 363         assert(route);
 364         assert(src || src_prefixlen == 0);
 365
 366         route->src = src ? *src : (union in_addr_union) {};
 367         route->src_prefixlen = src_prefixlen;
 368         route->gw = gw ? *gw : (union in_addr_union) {};
 369         route->prefsrc = prefsrc ? *prefsrc : (union in_addr_union) {};
 370         route->scope = scope;
 371         route->protocol = protocol;
 372         route->type = type;
 373 }
 374
 375 int route_remove(Route *route, Link *link,
 376                  sd_netlink_message_handler_t callback) {
 377
 378         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
 379         int r;
 380
 381         assert(link);
 382         assert(link->manager);
 383         assert(link->manager->rtnl);
 384         assert(link->ifindex > 0);
 385         assert(IN_SET(route->family, AF_INET, AF_INET6));
 386
 387         r = sd_rtnl_message_new_route(link->manager->rtnl, &req,
 388                                       RTM_DELROUTE, route->family,
 389                                       route->protocol);
 390         if (r < 0)
 391                 return log_error_errno(r, "Could not create RTM_DELROUTE message: %m");
 392
 393         if (!in_addr_is_null(route->family, &route->gw)) {
 394                 if (route->family == AF_INET)
 395                         r = sd_netlink_message_append_in_addr(req, RTA_GATEWAY, &route->gw.in);
 396                 else if (route->family == AF_INET6)
 397                         r = sd_netlink_message_append_in6_addr(req, RTA_GATEWAY, &route->gw.in6);
 398                 if (r < 0)
 399                         return log_error_errno(r, "Could not append RTA_GATEWAY attribute: %m");
 400         }
 401
 402         if (route->dst_prefixlen) {
 403                 if (route->family == AF_INET)
 404                         r = sd_netlink_message_append_in_addr(req, RTA_DST, &route->dst.in);
 405                 else if (route->family == AF_INET6)
 406                         r = sd_netlink_message_append_in6_addr(req, RTA_DST, &route->dst.in6);
 407                 if (r < 0)
 408                         return log_error_errno(r, "Could not append RTA_DST attribute: %m");
 409
 410                 r = sd_rtnl_message_route_set_dst_prefixlen(req, route->dst_prefixlen);
 411                 if (r < 0)
 412                         return log_error_errno(r, "Could not set destination prefix length: %m");
 413         }
 414
 415         if (route->src_prefixlen) {
 416                 if (route->family == AF_INET)
 417                         r = sd_netlink_message_append_in_addr(req, RTA_SRC, &route->src.in);
 418                 else if (route->family == AF_INET6)
 419                         r = sd_netlink_message_append_in6_addr(req, RTA_SRC, &route->src.in6);
 420                 if (r < 0)
 421                         return log_error_errno(r, "Could not append RTA_SRC attribute: %m");
 422
 423                 r = sd_rtnl_message_route_set_src_prefixlen(req, route->src_prefixlen);
 424                 if (r < 0)
 425                         return log_error_errno(r, "Could not set source prefix length: %m");
 426         }
 427
 428         if (!in_addr_is_null(route->family, &route->prefsrc)) {
 429                 if (route->family == AF_INET)
 430                         r = sd_netlink_message_append_in_addr(req, RTA_PREFSRC, &route->prefsrc.in);
 431                 else if (route->family == AF_INET6)
 432                         r = sd_netlink_message_append_in6_addr(req, RTA_PREFSRC, &route->prefsrc.in6);
 433                 if (r < 0)
 434                         return log_error_errno(r, "Could not append RTA_PREFSRC attribute: %m");
 435         }
 436
 437         r = sd_rtnl_message_route_set_scope(req, route->scope);
 438         if (r < 0)
 439                 return log_error_errno(r, "Could not set scope: %m");
 440
 441         r = sd_netlink_message_append_u32(req, RTA_PRIORITY, route->priority);
 442         if (r < 0)
 443                 return log_error_errno(r, "Could not append RTA_PRIORITY attribute: %m");
 444
 445         if (!IN_SET(route->type, RTN_UNREACHABLE, RTN_PROHIBIT, RTN_BLACKHOLE)) {
 446                 r = sd_netlink_message_append_u32(req, RTA_OIF, link->ifindex);
 447                 if (r < 0)
 448                         return log_error_errno(r, "Could not append RTA_OIF attribute: %m");
 449         }
 450
 451         r = sd_netlink_call_async(link->manager->rtnl, req, callback, link, 0, NULL);
 452         if (r < 0)
 453                 return log_error_errno(r, "Could not send rtnetlink message: %m");
 454
 455         link_ref(link);
 456
 457         return 0;
 458 }
 459
 460 static int route_expire_callback(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
 461         Link *link = userdata;
 462         int r;
 463
 464         assert(rtnl);
 465         assert(m);
 466         assert(link);
 467         assert(link->ifname);
 468
 469         if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
 470                 return 1;
 471
 472         r = sd_netlink_message_get_errno(m);
 473         if (r < 0 && r != -EEXIST)
 474                 log_link_warning_errno(link, r, "could not remove route: %m");
 475
 476         return 1;
 477 }
 478
 479 int route_expire_handler(sd_event_source *s, uint64_t usec, void *userdata) {
 480         Route *route = userdata;
 481         int r;
 482
 483         assert(route);
 484
 485         r = route_remove(route, route->link, route_expire_callback);
 486         if (r < 0)
 487                 log_warning_errno(r, "Could not remove route: %m");
 488         else
 489                 route_free(route);
 490
 491         return 1;
 492 }
 493
 494 int route_configure(
 495                 Route *route,
 496                 Link *link,
 497                 sd_netlink_message_handler_t callback) {
 498
 499         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
 500         _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
 501         usec_t lifetime;
 502         int r;
 503
 504         assert(link);
 505         assert(link->manager);
 506         assert(link->manager->rtnl);
 507         assert(link->ifindex > 0);
 508         assert(IN_SET(route->family, AF_INET, AF_INET6));
 509
 510         if (route_get(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL) <= 0 &&
 511             set_size(link->routes) >= routes_max())
 512                 return -E2BIG;
 513
 514         r = sd_rtnl_message_new_route(link->manager->rtnl, &req,
 515                                       RTM_NEWROUTE, route->family,
 516                                       route->protocol);
 517         if (r < 0)
 518                 return log_error_errno(r, "Could not create RTM_NEWROUTE message: %m");
 519
 520         if (!in_addr_is_null(route->family, &route->gw)) {
 521                 if (route->family == AF_INET)
 522                         r = sd_netlink_message_append_in_addr(req, RTA_GATEWAY, &route->gw.in);
 523                 else if (route->family == AF_INET6)
 524                         r = sd_netlink_message_append_in6_addr(req, RTA_GATEWAY, &route->gw.in6);
 525                 if (r < 0)
 526                         return log_error_errno(r, "Could not append RTA_GATEWAY attribute: %m");
 527
 528                 r = sd_rtnl_message_route_set_family(req, route->family);
 529                 if (r < 0)
 530                         return log_error_errno(r, "Could not set route family: %m");
 531         }
 532
 533         if (route->dst_prefixlen) {
 534                 if (route->family == AF_INET)
 535                         r = sd_netlink_message_append_in_addr(req, RTA_DST, &route->dst.in);
 536                 else if (route->family == AF_INET6)
 537                         r = sd_netlink_message_append_in6_addr(req, RTA_DST, &route->dst.in6);
 538                 if (r < 0)
 539                         return log_error_errno(r, "Could not append RTA_DST attribute: %m");
 540
 541                 r = sd_rtnl_message_route_set_dst_prefixlen(req, route->dst_prefixlen);
 542                 if (r < 0)
 543                         return log_error_errno(r, "Could not set destination prefix length: %m");
 544         }
 545
 546         if (route->src_prefixlen) {
 547                 if (route->family == AF_INET)
 548                         r = sd_netlink_message_append_in_addr(req, RTA_SRC, &route->src.in);
 549                 else if (route->family == AF_INET6)
 550                         r = sd_netlink_message_append_in6_addr(req, RTA_SRC, &route->src.in6);
 551                 if (r < 0)
 552                         return log_error_errno(r, "Could not append RTA_SRC attribute: %m");
 553
 554                 r = sd_rtnl_message_route_set_src_prefixlen(req, route->src_prefixlen);
 555                 if (r < 0)
 556                         return log_error_errno(r, "Could not set source prefix length: %m");
 557         }
 558
 559         if (!in_addr_is_null(route->family, &route->prefsrc)) {
 560                 if (route->family == AF_INET)
 561                         r = sd_netlink_message_append_in_addr(req, RTA_PREFSRC, &route->prefsrc.in);
 562                 else if (route->family == AF_INET6)
 563                         r = sd_netlink_message_append_in6_addr(req, RTA_PREFSRC, &route->prefsrc.in6);
 564                 if (r < 0)
 565                         return log_error_errno(r, "Could not append RTA_PREFSRC attribute: %m");
 566         }
 567
 568         r = sd_rtnl_message_route_set_scope(req, route->scope);
 569         if (r < 0)
 570                 return log_error_errno(r, "Could not set scope: %m");
 571
 572         r = sd_rtnl_message_route_set_flags(req, route->flags);
 573         if (r < 0)
 574                 return log_error_errno(r, "Could not set flags: %m");
 575
 576         if (route->table != RT_TABLE_MAIN) {
 577                 if (route->table < 256) {
 578                         r = sd_rtnl_message_route_set_table(req, route->table);
 579                         if (r < 0)
 580                                 return log_error_errno(r, "Could not set route table: %m");
 581                 } else {
 582                         r = sd_rtnl_message_route_set_table(req, RT_TABLE_UNSPEC);
 583                         if (r < 0)
 584                                 return log_error_errno(r, "Could not set route table: %m");
 585
 586                         /* Table attribute to allow more than 256. */
 587                         r = sd_netlink_message_append_data(req, RTA_TABLE, &route->table, sizeof(route->table));
 588                         if (r < 0)
 589                                 return log_error_errno(r, "Could not append RTA_TABLE attribute: %m");
 590                 }
 591         }
 592
 593         r = sd_netlink_message_append_u32(req, RTA_PRIORITY, route->priority);
 594         if (r < 0)
 595                 return log_error_errno(r, "Could not append RTA_PRIORITY attribute: %m");
 596
 597         r = sd_netlink_message_append_u8(req, RTA_PREF, route->pref);
 598         if (r < 0)
 599                 return log_error_errno(r, "Could not append RTA_PREF attribute: %m");
 600
 601         if (route->lifetime != USEC_INFINITY && kernel_route_expiration_supported()) {
 602                 r = sd_netlink_message_append_u32(req, RTA_EXPIRES,
 603                         DIV_ROUND_UP(usec_sub_unsigned(route->lifetime, now(clock_boottime_or_monotonic())), USEC_PER_SEC));
 604                 if (r < 0)
 605                         return log_error_errno(r, "Could not append RTA_EXPIRES attribute: %m");
 606         }
 607
 608         r = sd_rtnl_message_route_set_type(req, route->type);
 609         if (r < 0)
 610                 return log_error_errno(r, "Could not set route type: %m");
 611
 612         if (!IN_SET(route->type, RTN_UNREACHABLE, RTN_PROHIBIT, RTN_BLACKHOLE)) {
 613                 r = sd_netlink_message_append_u32(req, RTA_OIF, link->ifindex);
 614                 if (r < 0)
 615                         return log_error_errno(r, "Could not append RTA_OIF attribute: %m");
 616         }
 617
 618         r = sd_netlink_message_open_container(req, RTA_METRICS);
 619         if (r < 0)
 620                 return log_error_errno(r, "Could not append RTA_METRICS attribute: %m");
 621
 622         if (route->mtu > 0) {
 623                 r = sd_netlink_message_append_u32(req, RTAX_MTU, route->mtu);
 624                 if (r < 0)
 625                         return log_error_errno(r, "Could not append RTAX_MTU attribute: %m");
 626         }
 627
 628         if (route->initcwnd > 0) {
 629                 r = sd_netlink_message_append_u32(req, RTAX_INITCWND, route->initcwnd);
 630                 if (r < 0)
 631                         return log_error_errno(r, "Could not append RTAX_INITCWND attribute: %m");
 632         }
 633
 634         if (route->initrwnd > 0) {
 635                 r = sd_netlink_message_append_u32(req, RTAX_INITRWND, route->initrwnd);
 636                 if (r < 0)
 637                         return log_error_errno(r, "Could not append RTAX_INITRWND attribute: %m");
 638         }
 639
 640         if (route->quickack != -1) {
 641                 r = sd_netlink_message_append_u32(req, RTAX_QUICKACK, route->quickack);
 642                 if (r < 0)
 643                         return log_error_errno(r, "Could not append RTAX_QUICKACK attribute: %m");
 644         }
 645
 646         r = sd_netlink_message_close_container(req);
 647         if (r < 0)
 648                 return log_error_errno(r, "Could not append RTA_METRICS attribute: %m");
 649
 650         r = sd_netlink_call_async(link->manager->rtnl, req, callback, link, 0, NULL);
 651         if (r < 0)
 652                 return log_error_errno(r, "Could not send rtnetlink message: %m");
 653
 654         link_ref(link);
 655
 656         lifetime = route->lifetime;
 657
 658         r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, &route);
 659         if (r < 0)
 660                 return log_error_errno(r, "Could not add route: %m");
 661
 662         /* TODO: drop expiration handling once it can be pushed into the kernel */
 663         route->lifetime = lifetime;
 664
 665         if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
 666                 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(),
 667                                       route->lifetime, 0, route_expire_handler, route);
 668                 if (r < 0)
 669                         return log_error_errno(r, "Could not arm expiration timer: %m");
 670         }
 671
 672         sd_event_source_unref(route->expire);
 673         route->expire = TAKE_PTR(expire);
 674
 675         return 0;
 676 }
 677
 678 int config_parse_gateway(
 679                 const char *unit,
 680                 const char *filename,
 681                 unsigned line,
 682                 const char *section,
 683                 unsigned section_line,
 684                 const char *lvalue,
 685                 int ltype,
 686                 const char *rvalue,
 687                 void *data,
 688                 void *userdata) {
 689
 690         Network *network = userdata;
 691         _cleanup_(route_freep) Route *n = NULL;
 692         union in_addr_union buffer;
 693         int r, f;
 694
 695         assert(filename);
 696         assert(section);
 697         assert(lvalue);
 698         assert(rvalue);
 699         assert(data);
 700
 701         if (streq(section, "Network")) {
 702                 /* we are not in an Route section, so treat
 703                  * this as the special '0' section */
 704                 r = route_new_static(network, NULL, 0, &n);
 705         } else
 706                 r = route_new_static(network, filename, section_line, &n);
 707
 708         if (r < 0)
 709                 return r;
 710
 711         r = in_addr_from_string_auto(rvalue, &f, &buffer);
 712         if (r < 0) {
 713                 log_syntax(unit, LOG_ERR, filename, line, r, "Route is invalid, ignoring assignment: %s", rvalue);
 714                 return 0;
 715         }
 716
 717         n->family = f;
 718         n->gw = buffer;
 719         TAKE_PTR(n);
 720
 721         return 0;
 722 }
 723
 724 int config_parse_preferred_src(
 725                 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_freep) 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         TAKE_PTR(n);
 761
 762         return 0;
 763 }
 764
 765 int config_parse_destination(
 766                 const char *unit,
 767                 const char *filename,
 768                 unsigned line,
 769                 const char *section,
 770                 unsigned section_line,
 771                 const char *lvalue,
 772                 int ltype,
 773                 const char *rvalue,
 774                 void *data,
 775                 void *userdata) {
 776
 777         Network *network = userdata;
 778         _cleanup_(route_freep) Route *n = NULL;
 779         union in_addr_union buffer;
 780         unsigned char prefixlen;
 781         int r;
 782
 783         assert(filename);
 784         assert(section);
 785         assert(lvalue);
 786         assert(rvalue);
 787         assert(data);
 788
 789         r = route_new_static(network, filename, section_line, &n);
 790         if (r < 0)
 791                 return r;
 792
 793         r = in_addr_prefix_from_string(rvalue, AF_INET, &buffer, &prefixlen);
 794         if (r < 0) {
 795                 r = in_addr_prefix_from_string(rvalue, AF_INET6, &buffer, &prefixlen);
 796                 if (r < 0) {
 797                         log_syntax(unit, LOG_ERR, filename, line, r,
 798                                    "Route %s= prefix is invalid, ignoring assignment: %s",
 799                                    lvalue, rvalue);
 800                         return 0;
 801                 }
 802
 803                 n->family = AF_INET6;
 804         } else
 805                 n->family = AF_INET;
 806
 807         if (streq(lvalue, "Destination")) {
 808                 n->dst = buffer;
 809                 n->dst_prefixlen = prefixlen;
 810         } else if (streq(lvalue, "Source")) {
 811                 n->src = buffer;
 812                 n->src_prefixlen = prefixlen;
 813         } else
 814                 assert_not_reached(lvalue);
 815
 816         TAKE_PTR(n);
 817         return 0;
 818 }
 819
 820 int config_parse_route_priority(
 821                 const char *unit,
 822                 const char *filename,
 823                 unsigned line,
 824                 const char *section,
 825                 unsigned section_line,
 826                 const char *lvalue,
 827                 int ltype,
 828                 const char *rvalue,
 829                 void *data,
 830                 void *userdata) {
 831
 832         Network *network = userdata;
 833         _cleanup_(route_freep) Route *n = NULL;
 834         int r;
 835
 836         assert(filename);
 837         assert(section);
 838         assert(lvalue);
 839         assert(rvalue);
 840         assert(data);
 841
 842         r = route_new_static(network, filename, section_line, &n);
 843         if (r < 0)
 844                 return r;
 845
 846         r = safe_atou32(rvalue, &n->priority);
 847         if (r < 0) {
 848                 log_syntax(unit, LOG_ERR, filename, line, r,
 849                            "Could not parse route priority \"%s\", ignoring assignment: %m", rvalue);
 850                 return 0;
 851         }
 852
 853         TAKE_PTR(n);
 854         return 0;
 855 }
 856
 857 int config_parse_route_scope(
 858                 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
 869         Network *network = userdata;
 870         _cleanup_(route_freep) Route *n = NULL;
 871         int r;
 872
 873         assert(filename);
 874         assert(section);
 875         assert(lvalue);
 876         assert(rvalue);
 877         assert(data);
 878
 879         r = route_new_static(network, filename, section_line, &n);
 880         if (r < 0)
 881                 return r;
 882
 883         if (streq(rvalue, "host"))
 884                 n->scope = RT_SCOPE_HOST;
 885         else if (streq(rvalue, "link"))
 886                 n->scope = RT_SCOPE_LINK;
 887         else if (streq(rvalue, "global"))
 888                 n->scope = RT_SCOPE_UNIVERSE;
 889         else {
 890                 log_syntax(unit, LOG_ERR, filename, line, 0, "Unknown route scope: %s", rvalue);
 891                 return 0;
 892         }
 893
 894         TAKE_PTR(n);
 895         return 0;
 896 }
 897
 898 int config_parse_route_table(
 899                 const char *unit,
 900                 const char *filename,
 901                 unsigned line,
 902                 const char *section,
 903                 unsigned section_line,
 904                 const char *lvalue,
 905                 int ltype,
 906                 const char *rvalue,
 907                 void *data,
 908                 void *userdata) {
 909
 910         _cleanup_(route_freep) Route *n = NULL;
 911         Network *network = userdata;
 912         int r;
 913
 914         assert(filename);
 915         assert(section);
 916         assert(lvalue);
 917         assert(rvalue);
 918         assert(data);
 919
 920         r = route_new_static(network, filename, section_line, &n);
 921         if (r < 0)
 922                 return r;
 923
 924         r = safe_atou32(rvalue, &n->table);
 925         if (r < 0) {
 926                 log_syntax(unit, LOG_ERR, filename, line, r,
 927                            "Could not parse route table number \"%s\", ignoring assignment: %m", rvalue);
 928                 return 0;
 929         }
 930
 931         TAKE_PTR(n);
 932         return 0;
 933 }
 934
 935 int config_parse_gateway_onlink(
 936                 const char *unit,
 937                 const char *filename,
 938                 unsigned line,
 939                 const char *section,
 940                 unsigned section_line,
 941                 const char *lvalue,
 942                 int ltype,
 943                 const char *rvalue,
 944                 void *data,
 945                 void *userdata) {
 946
 947         Network *network = userdata;
 948         _cleanup_(route_freep) 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         TAKE_PTR(n);
 970         return 0;
 971 }
 972
 973 int config_parse_ipv6_route_preference(
 974                 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
 985         Network *network = userdata;
 986         _cleanup_(route_freep) Route *n = NULL;
 987         int r;
 988
 989         r = route_new_static(network, filename, section_line, &n);
 990         if (r < 0)
 991                 return r;
 992
 993         if (streq(rvalue, "low"))
 994                 n->pref = ICMPV6_ROUTER_PREF_LOW;
 995         else if (streq(rvalue, "medium"))
 996                 n->pref = ICMPV6_ROUTER_PREF_MEDIUM;
 997         else if (streq(rvalue, "high"))
 998                 n->pref = ICMPV6_ROUTER_PREF_HIGH;
 999         else {
1000                 log_syntax(unit, LOG_ERR, filename, line, 0, "Unknown route preference: %s", rvalue);
1001                 return 0;
1002         }
1003
1004         TAKE_PTR(n);
1005         return 0;
1006 }
1007
1008 int config_parse_route_protocol(
1009                 const char *unit,
1010                 const char *filename,
1011                 unsigned line,
1012                 const char *section,
1013                 unsigned section_line,
1014                 const char *lvalue,
1015                 int ltype,
1016                 const char *rvalue,
1017                 void *data,
1018                 void *userdata) {
1019
1020         Network *network = userdata;
1021         _cleanup_(route_freep) Route *n = NULL;
1022         int r;
1023
1024         r = route_new_static(network, filename, section_line, &n);
1025         if (r < 0)
1026                 return r;
1027
1028         if (streq(rvalue, "kernel"))
1029                 n->protocol = RTPROT_KERNEL;
1030         else if (streq(rvalue, "boot"))
1031                 n->protocol = RTPROT_BOOT;
1032         else if (streq(rvalue, "static"))
1033                 n->protocol = RTPROT_STATIC;
1034         else {
1035                 r = safe_atou8(rvalue , &n->protocol);
1036                 if (r < 0) {
1037                         log_syntax(unit, LOG_ERR, filename, line, r, "Could not parse route protocol \"%s\", ignoring assignment: %m", rvalue);
1038                         return 0;
1039                 }
1040         }
1041
1042         TAKE_PTR(n);
1043         return 0;
1044 }
1045
1046 int config_parse_route_type(
1047                 const char *unit,
1048                 const char *filename,
1049                 unsigned line,
1050                 const char *section,
1051                 unsigned section_line,
1052                 const char *lvalue,
1053                 int ltype,
1054                 const char *rvalue,
1055                 void *data,
1056                 void *userdata) {
1057
1058         Network *network = userdata;
1059         _cleanup_(route_freep) Route *n = NULL;
1060         int r;
1061
1062         r = route_new_static(network, filename, section_line, &n);
1063         if (r < 0)
1064                 return r;
1065
1066         if (streq(rvalue, "unicast"))
1067                 n->type = RTN_UNICAST;
1068         else if (streq(rvalue, "blackhole"))
1069                 n->type = RTN_BLACKHOLE;
1070         else if (streq(rvalue, "unreachable"))
1071                 n->type = RTN_UNREACHABLE;
1072         else if (streq(rvalue, "prohibit"))
1073                 n->type = RTN_PROHIBIT;
1074         else {
1075                 log_syntax(unit, LOG_ERR, filename, line, r, "Could not parse route type \"%s\", ignoring assignment: %m", rvalue);
1076                 return 0;
1077         }
1078
1079         TAKE_PTR(n);
1080         return 0;
1081 }
1082
1083 int config_parse_tcp_window(
1084                 const char *unit,
1085                 const char *filename,
1086                 unsigned line,
1087                 const char *section,
1088                 unsigned section_line,
1089                 const char *lvalue,
1090                 int ltype,
1091                 const char *rvalue,
1092                 void *data,
1093                 void *userdata) {
1094
1095         _cleanup_(route_freep) Route *n = NULL;
1096         Network *network = userdata;
1097         uint64_t k;
1098         int r;
1099
1100         assert(filename);
1101         assert(section);
1102         assert(lvalue);
1103         assert(rvalue);
1104         assert(data);
1105
1106         r = route_new_static(network, filename, section_line, &n);
1107         if (r < 0)
1108                 return r;
1109
1110         r = parse_size(rvalue, 1024, &k);
1111         if (r < 0 || k > UINT32_MAX)  {
1112                 log_syntax(unit, LOG_ERR, filename, line, r,
1113                            "Could not parse TCP %s \"%s\" bytes, ignoring assignment: %m", rvalue, lvalue);
1114                 return 0;
1115         }
1116
1117         if (streq(lvalue, "InitialCongestionWindow"))
1118                 n->initcwnd = k;
1119         else if (streq(lvalue, "InitialAdvertisedReceiveWindow"))
1120                 n->initrwnd = k;
1121         else {
1122                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse TCP %s: %s", lvalue, rvalue);
1123                 return 0;
1124         }
1125
1126         TAKE_PTR(n);
1127         return 0;
1128 }
1129
1130 int config_parse_quickack(
1131                 const char *unit,
1132                 const char *filename,
1133                 unsigned line,
1134                 const char *section,
1135                 unsigned section_line,
1136                 const char *lvalue,
1137                 int ltype,
1138                 const char *rvalue,
1139                 void *data,
1140                 void *userdata) {
1141
1142         _cleanup_(route_freep) Route *n = NULL;
1143         Network *network = userdata;
1144         int k, r;
1145
1146         assert(filename);
1147         assert(section);
1148         assert(lvalue);
1149         assert(rvalue);
1150         assert(data);
1151
1152         r = route_new_static(network, filename, section_line, &n);
1153         if (r < 0)
1154                 return r;
1155
1156         k = parse_boolean(rvalue);
1157         if (k < 0) {
1158                 log_syntax(unit, LOG_ERR, filename, line, k, "Failed to parse TCP quickack, ignoring: %s", rvalue);
1159                 return 0;
1160         }
1161
1162         n->quickack = !!k;
1163         TAKE_PTR(n);
1164         return 0;
1165 }
1166
1167 int config_parse_route_mtu(
1168                 const char *unit,
1169                 const char *filename,
1170                 unsigned line,
1171                 const char *section,
1172                 unsigned section_line,
1173                 const char *lvalue,
1174                 int ltype,
1175                 const char *rvalue,
1176                 void *data,
1177                 void *userdata) {
1178
1179         Network *network = userdata;
1180         _cleanup_(route_freep) Route *n = NULL;
1181         int r;
1182
1183         assert(filename);
1184         assert(section);
1185         assert(lvalue);
1186         assert(rvalue);
1187         assert(data);
1188
1189         r = route_new_static(network, filename, section_line, &n);
1190         if (r < 0)
1191                 return r;
1192
1193         r = config_parse_mtu(unit, filename, line, section, section_line, lvalue, ltype, rvalue, &n->mtu, userdata);
1194         if (r < 0)
1195                 return r;
1196
1197         TAKE_PTR(n);
1198         return 0;
1199 }