src/network/networkd-route.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2013 Tom Gundersen <teg@jklm.no>
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include "alloc-util.h"
  21 #include "conf-parser.h"
  22 #include "in-addr-util.h"
  23 #include "netlink-util.h"
  24 #include "networkd-route.h"
  25 #include "networkd.h"
  26 #include "parse-util.h"
  27 #include "set.h"
  28 #include "string-util.h"
  29 #include "util.h"
  30
  31 #define ROUTES_PER_LINK_MAX 2048U
  32 #define STATIC_ROUTES_PER_NETWORK_MAX 1024U
  33
  34 int route_new(Route **ret) {
  35         _cleanup_route_free_ Route *route = NULL;
  36
  37         route = new0(Route, 1);
  38         if (!route)
  39                 return -ENOMEM;
  40
  41         route->family = AF_UNSPEC;
  42         route->scope = RT_SCOPE_UNIVERSE;
  43         route->protocol = RTPROT_UNSPEC;
  44         route->table = RT_TABLE_DEFAULT;
  45         route->lifetime = USEC_INFINITY;
  46
  47         *ret = route;
  48         route = NULL;
  49
  50         return 0;
  51 }
  52
  53 int route_new_static(Network *network, unsigned section, Route **ret) {
  54         _cleanup_route_free_ Route *route = NULL;
  55         int r;
  56
  57         assert(network);
  58         assert(ret);
  59
  60         if (section) {
  61                 route = hashmap_get(network->routes_by_section, UINT_TO_PTR(section));
  62                 if (route) {
  63                         *ret = route;
  64                         route = NULL;
  65
  66                         return 0;
  67                 }
  68         }
  69
  70         if (network->n_static_routes >= STATIC_ROUTES_PER_NETWORK_MAX)
  71                 return -E2BIG;
  72
  73         r = route_new(&route);
  74         if (r < 0)
  75                 return r;
  76
  77         route->protocol = RTPROT_STATIC;
  78
  79         if (section) {
  80                 route->section = section;
  81
  82                 r = hashmap_put(network->routes_by_section, UINT_TO_PTR(route->section), route);
  83                 if (r < 0)
  84                         return r;
  85         }
  86
  87         route->network = network;
  88         LIST_PREPEND(routes, network->static_routes, route);
  89         network->n_static_routes++;
  90
  91         *ret = route;
  92         route = NULL;
  93
  94         return 0;
  95 }
  96
  97 void route_free(Route *route) {
  98         if (!route)
  99                 return;
 100
 101         if (route->network) {
 102                 LIST_REMOVE(routes, route->network->static_routes, route);
 103
 104                 assert(route->network->n_static_routes > 0);
 105                 route->network->n_static_routes--;
 106
 107                 if (route->section)
 108                         hashmap_remove(route->network->routes_by_section, UINT_TO_PTR(route->section));
 109         }
 110
 111         if (route->link) {
 112                 set_remove(route->link->routes, route);
 113                 set_remove(route->link->routes_foreign, route);
 114         }
 115
 116         sd_event_source_unref(route->expire);
 117
 118         free(route);
 119 }
 120
 121 static void route_hash_func(const void *b, struct siphash *state) {
 122         const Route *route = b;
 123
 124         assert(route);
 125
 126         siphash24_compress(&route->family, sizeof(route->family), state);
 127
 128         switch (route->family) {
 129         case AF_INET:
 130         case AF_INET6:
 131                 /* Equality of routes are given by the 4-touple
 132                    (dst_prefix,dst_prefixlen,tos,priority,table) */
 133                 siphash24_compress(&route->dst, FAMILY_ADDRESS_SIZE(route->family), state);
 134                 siphash24_compress(&route->dst_prefixlen, sizeof(route->dst_prefixlen), state);
 135                 siphash24_compress(&route->tos, sizeof(route->tos), state);
 136                 siphash24_compress(&route->priority, sizeof(route->priority), state);
 137                 siphash24_compress(&route->table, sizeof(route->table), state);
 138
 139                 break;
 140         default:
 141                 /* treat any other address family as AF_UNSPEC */
 142                 break;
 143         }
 144 }
 145
 146 static int route_compare_func(const void *_a, const void *_b) {
 147         const Route *a = _a, *b = _b;
 148
 149         if (a->family < b->family)
 150                 return -1;
 151         if (a->family > b->family)
 152                 return 1;
 153
 154         switch (a->family) {
 155         case AF_INET:
 156         case AF_INET6:
 157                 if (a->dst_prefixlen < b->dst_prefixlen)
 158                         return -1;
 159                 if (a->dst_prefixlen > b->dst_prefixlen)
 160                         return 1;
 161
 162                 if (a->tos < b->tos)
 163                         return -1;
 164                 if (a->tos > b->tos)
 165                         return 1;
 166
 167                 if (a->priority < b->priority)
 168                         return -1;
 169                 if (a->priority > b->priority)
 170                         return 1;
 171
 172                 if (a->table < b->table)
 173                         return -1;
 174                 if (a->table > b->table)
 175                         return 1;
 176
 177                 return memcmp(&a->dst, &b->dst, FAMILY_ADDRESS_SIZE(a->family));
 178         default:
 179                 /* treat any other address family as AF_UNSPEC */
 180                 return 0;
 181         }
 182 }
 183
 184 static const struct hash_ops route_hash_ops = {
 185         .hash = route_hash_func,
 186         .compare = route_compare_func
 187 };
 188
 189 int route_get(Link *link,
 190               int family,
 191               const union in_addr_union *dst,
 192               unsigned char dst_prefixlen,
 193               unsigned char tos,
 194               uint32_t priority,
 195               unsigned char table,
 196               Route **ret) {
 197
 198         Route route, *existing;
 199
 200         assert(link);
 201         assert(dst);
 202
 203         route = (Route) {
 204                 .family = family,
 205                 .dst = *dst,
 206                 .dst_prefixlen = dst_prefixlen,
 207                 .tos = tos,
 208                 .priority = priority,
 209                 .table = table,
 210         };
 211
 212         existing = set_get(link->routes, &route);
 213         if (existing) {
 214                 if (ret)
 215                         *ret = existing;
 216                 return 1;
 217         }
 218
 219         existing = set_get(link->routes_foreign, &route);
 220         if (existing) {
 221                 if (ret)
 222                         *ret = existing;
 223                 return 0;
 224         }
 225
 226         return -ENOENT;
 227 }
 228
 229 static int route_add_internal(Link *link, Set **routes,
 230                               int family,
 231                               union in_addr_union *dst,
 232                               unsigned char dst_prefixlen,
 233                               unsigned char tos,
 234                               uint32_t priority,
 235                               unsigned char table, Route **ret) {
 236         _cleanup_route_free_ Route *route = NULL;
 237         int r;
 238
 239         assert(link);
 240         assert(routes);
 241         assert(dst);
 242
 243         r = route_new(&route);
 244         if (r < 0)
 245                 return r;
 246
 247         route->family = family;
 248         route->dst = *dst;
 249         route->dst_prefixlen = dst_prefixlen;
 250         route->tos = tos;
 251         route->priority = priority;
 252         route->table = table;
 253
 254         r = set_ensure_allocated(routes, &route_hash_ops);
 255         if (r < 0)
 256                 return r;
 257
 258         r = set_put(*routes, route);
 259         if (r < 0)
 260                 return r;
 261
 262         route->link = link;
 263
 264         if (ret)
 265                 *ret = route;
 266
 267         route = NULL;
 268
 269         return 0;
 270 }
 271
 272 int route_add_foreign(Link *link,
 273                       int family,
 274                       union in_addr_union *dst,
 275                       unsigned char dst_prefixlen,
 276                       unsigned char tos,
 277                       uint32_t priority,
 278                       unsigned char table, Route **ret) {
 279         return route_add_internal(link, &link->routes_foreign, family, dst, dst_prefixlen, tos, priority, table, ret);
 280 }
 281
 282 int route_add(Link *link,
 283               int family,
 284               union in_addr_union *dst,
 285               unsigned char dst_prefixlen,
 286               unsigned char tos,
 287               uint32_t priority,
 288               unsigned char table, Route **ret) {
 289         Route *route;
 290         int r;
 291
 292         r = route_get(link, family, dst, dst_prefixlen, tos, priority, table, &route);
 293         if (r == -ENOENT) {
 294                 /* Route does not exist, create a new one */
 295                 r = route_add_internal(link, &link->routes, family, dst, dst_prefixlen, tos, priority, table, &route);
 296                 if (r < 0)
 297                         return r;
 298         } else if (r == 0) {
 299                 /* Take over a foreign route */
 300                 r = set_ensure_allocated(&link->routes, &route_hash_ops);
 301                 if (r < 0)
 302                         return r;
 303
 304                 r = set_put(link->routes, route);
 305                 if (r < 0)
 306                         return r;
 307
 308                 set_remove(link->routes_foreign, route);
 309         } else if (r == 1) {
 310                 /* Route exists, do nothing */
 311                 ;
 312         } else
 313                 return r;
 314
 315         *ret = route;
 316
 317         return 0;
 318 }
 319
 320 int route_update(Route *route,
 321                  union in_addr_union *src,
 322                  unsigned char src_prefixlen,
 323                  union in_addr_union *gw,
 324                  union in_addr_union *prefsrc,
 325                  unsigned char scope,
 326                  unsigned char protocol) {
 327         assert(route);
 328         assert(src);
 329         assert(gw);
 330         assert(prefsrc);
 331
 332         route->src = *src;
 333         route->src_prefixlen = src_prefixlen;
 334         route->gw = *gw;
 335         route->prefsrc = *prefsrc;
 336         route->scope = scope;
 337         route->protocol = protocol;
 338
 339         return 0;
 340 }
 341
 342 int route_remove(Route *route, Link *link,
 343                sd_netlink_message_handler_t callback) {
 344         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
 345         int r;
 346
 347         assert(link);
 348         assert(link->manager);
 349         assert(link->manager->rtnl);
 350         assert(link->ifindex > 0);
 351         assert(route->family == AF_INET || route->family == AF_INET6);
 352
 353         r = sd_rtnl_message_new_route(link->manager->rtnl, &req,
 354                                       RTM_DELROUTE, route->family,
 355                                       route->protocol);
 356         if (r < 0)
 357                 return log_error_errno(r, "Could not create RTM_DELROUTE message: %m");
 358
 359         if (!in_addr_is_null(route->family, &route->gw)) {
 360                 if (route->family == AF_INET)
 361                         r = sd_netlink_message_append_in_addr(req, RTA_GATEWAY, &route->gw.in);
 362                 else if (route->family == AF_INET6)
 363                         r = sd_netlink_message_append_in6_addr(req, RTA_GATEWAY, &route->gw.in6);
 364                 if (r < 0)
 365                         return log_error_errno(r, "Could not append RTA_GATEWAY attribute: %m");
 366         }
 367
 368         if (route->dst_prefixlen) {
 369                 if (route->family == AF_INET)
 370                         r = sd_netlink_message_append_in_addr(req, RTA_DST, &route->dst.in);
 371                 else if (route->family == AF_INET6)
 372                         r = sd_netlink_message_append_in6_addr(req, RTA_DST, &route->dst.in6);
 373                 if (r < 0)
 374                         return log_error_errno(r, "Could not append RTA_DST attribute: %m");
 375
 376                 r = sd_rtnl_message_route_set_dst_prefixlen(req, route->dst_prefixlen);
 377                 if (r < 0)
 378                         return log_error_errno(r, "Could not set destination prefix length: %m");
 379         }
 380
 381         if (route->src_prefixlen) {
 382                 if (route->family == AF_INET)
 383                         r = sd_netlink_message_append_in_addr(req, RTA_SRC, &route->src.in);
 384                 else if (route->family == AF_INET6)
 385                         r = sd_netlink_message_append_in6_addr(req, RTA_SRC, &route->src.in6);
 386                 if (r < 0)
 387                         return log_error_errno(r, "Could not append RTA_SRC attribute: %m");
 388
 389                 r = sd_rtnl_message_route_set_src_prefixlen(req, route->src_prefixlen);
 390                 if (r < 0)
 391                         return log_error_errno(r, "Could not set source prefix length: %m");
 392         }
 393
 394         if (!in_addr_is_null(route->family, &route->prefsrc)) {
 395                 if (route->family == AF_INET)
 396                         r = sd_netlink_message_append_in_addr(req, RTA_PREFSRC, &route->prefsrc.in);
 397                 else if (route->family == AF_INET6)
 398                         r = sd_netlink_message_append_in6_addr(req, RTA_PREFSRC, &route->prefsrc.in6);
 399                 if (r < 0)
 400                         return log_error_errno(r, "Could not append RTA_PREFSRC attribute: %m");
 401         }
 402
 403         r = sd_rtnl_message_route_set_scope(req, route->scope);
 404         if (r < 0)
 405                 return log_error_errno(r, "Could not set scope: %m");
 406
 407         r = sd_netlink_message_append_u32(req, RTA_PRIORITY, route->priority);
 408         if (r < 0)
 409                 return log_error_errno(r, "Could not append RTA_PRIORITY attribute: %m");
 410
 411         r = sd_netlink_message_append_u32(req, RTA_OIF, link->ifindex);
 412         if (r < 0)
 413                 return log_error_errno(r, "Could not append RTA_OIF attribute: %m");
 414
 415         r = sd_netlink_call_async(link->manager->rtnl, req, callback, link, 0, NULL);
 416         if (r < 0)
 417                 return log_error_errno(r, "Could not send rtnetlink message: %m");
 418
 419         link_ref(link);
 420
 421         return 0;
 422 }
 423
 424 static int route_expire_callback(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
 425         Link *link = userdata;
 426         int r;
 427
 428         assert(rtnl);
 429         assert(m);
 430         assert(link);
 431         assert(link->ifname);
 432         assert(link->link_messages > 0);
 433
 434         if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
 435                 return 1;
 436
 437         link->link_messages--;
 438
 439         r = sd_netlink_message_get_errno(m);
 440         if (r < 0 && r != -EEXIST)
 441                 log_link_warning_errno(link, r, "could not remove route: %m");
 442
 443         if (link->link_messages == 0)
 444                 log_link_debug(link, "route removed");
 445
 446         return 1;
 447 }
 448
 449 int route_expire_handler(sd_event_source *s, uint64_t usec, void *userdata) {
 450         Route *route = userdata;
 451         int r;
 452
 453         assert(route);
 454
 455         r = route_remove(route, route->link, route_expire_callback);
 456         if (r < 0)
 457                 log_warning_errno(r, "Could not remove route: %m");
 458         else {
 459                 /* route may not be exist in kernel. If we fail still remove it */
 460                 route->link->link_messages++;
 461                 route_free(route);
 462         }
 463
 464         return 1;
 465 }
 466
 467 int route_configure(
 468                 Route *route,
 469                 Link *link,
 470                 sd_netlink_message_handler_t callback) {
 471
 472         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
 473         _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
 474         usec_t lifetime;
 475         int r;
 476
 477         assert(link);
 478         assert(link->manager);
 479         assert(link->manager->rtnl);
 480         assert(link->ifindex > 0);
 481         assert(route->family == AF_INET || route->family == AF_INET6);
 482
 483         if (route_get(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL) <= 0 &&
 484             set_size(route->link->routes) >= ROUTES_PER_LINK_MAX)
 485                 return -E2BIG;
 486
 487         r = sd_rtnl_message_new_route(link->manager->rtnl, &req,
 488                                       RTM_NEWROUTE, route->family,
 489                                       route->protocol);
 490         if (r < 0)
 491                 return log_error_errno(r, "Could not create RTM_NEWROUTE message: %m");
 492
 493         if (!in_addr_is_null(route->family, &route->gw)) {
 494                 if (route->family == AF_INET)
 495                         r = sd_netlink_message_append_in_addr(req, RTA_GATEWAY, &route->gw.in);
 496                 else if (route->family == AF_INET6)
 497                         r = sd_netlink_message_append_in6_addr(req, RTA_GATEWAY, &route->gw.in6);
 498                 if (r < 0)
 499                         return log_error_errno(r, "Could not append RTA_GATEWAY attribute: %m");
 500
 501                 r = sd_rtnl_message_route_set_family(req, route->family);
 502                 if (r < 0)
 503                         return log_error_errno(r, "Could not set route family: %m");
 504         }
 505
 506         if (route->dst_prefixlen) {
 507                 if (route->family == AF_INET)
 508                         r = sd_netlink_message_append_in_addr(req, RTA_DST, &route->dst.in);
 509                 else if (route->family == AF_INET6)
 510                         r = sd_netlink_message_append_in6_addr(req, RTA_DST, &route->dst.in6);
 511                 if (r < 0)
 512                         return log_error_errno(r, "Could not append RTA_DST attribute: %m");
 513
 514                 r = sd_rtnl_message_route_set_dst_prefixlen(req, route->dst_prefixlen);
 515                 if (r < 0)
 516                         return log_error_errno(r, "Could not set destination prefix length: %m");
 517         }
 518
 519         if (route->src_prefixlen) {
 520                 if (route->family == AF_INET)
 521                         r = sd_netlink_message_append_in_addr(req, RTA_SRC, &route->src.in);
 522                 else if (route->family == AF_INET6)
 523                         r = sd_netlink_message_append_in6_addr(req, RTA_SRC, &route->src.in6);
 524                 if (r < 0)
 525                         return log_error_errno(r, "Could not append RTA_SRC attribute: %m");
 526
 527                 r = sd_rtnl_message_route_set_src_prefixlen(req, route->src_prefixlen);
 528                 if (r < 0)
 529                         return log_error_errno(r, "Could not set source prefix length: %m");
 530         }
 531
 532         if (!in_addr_is_null(route->family, &route->prefsrc)) {
 533                 if (route->family == AF_INET)
 534                         r = sd_netlink_message_append_in_addr(req, RTA_PREFSRC, &route->prefsrc.in);
 535                 else if (route->family == AF_INET6)
 536                         r = sd_netlink_message_append_in6_addr(req, RTA_PREFSRC, &route->prefsrc.in6);
 537                 if (r < 0)
 538                         return log_error_errno(r, "Could not append RTA_PREFSRC attribute: %m");
 539         }
 540
 541         r = sd_rtnl_message_route_set_scope(req, route->scope);
 542         if (r < 0)
 543                 return log_error_errno(r, "Could not set scope: %m");
 544
 545         r = sd_rtnl_message_route_set_flags(req, route->flags);
 546         if (r < 0)
 547                 return log_error_errno(r, "Could not set flags: %m");
 548
 549         if (route->table != RT_TABLE_DEFAULT) {
 550
 551                 if (route->table < 256) {
 552                         r = sd_rtnl_message_route_set_table(req, route->table);
 553                         if (r < 0)
 554                                 return log_error_errno(r, "Could not set route table: %m");
 555                 } else {
 556
 557                         r = sd_rtnl_message_route_set_table(req, RT_TABLE_UNSPEC);
 558                         if (r < 0)
 559                                 return log_error_errno(r, "Could not set route table: %m");
 560
 561                         /* Table attribute to allow more than 256. */
 562                         r = sd_netlink_message_append_data(req, RTA_TABLE, &route->table, sizeof(route->table));
 563                         if (r < 0)
 564                                 return log_error_errno(r, "Could not append RTA_TABLE attribute: %m");
 565                 }
 566         }
 567
 568         r = sd_netlink_message_append_u32(req, RTA_PRIORITY, route->priority);
 569         if (r < 0)
 570                 return log_error_errno(r, "Could not append RTA_PRIORITY attribute: %m");
 571
 572         r = sd_netlink_message_append_u8(req, RTA_PREF, route->pref);
 573         if (r < 0)
 574                 return log_error_errno(r, "Could not append RTA_PREF attribute: %m");
 575
 576         r = sd_netlink_message_append_u32(req, RTA_OIF, link->ifindex);
 577         if (r < 0)
 578                 return log_error_errno(r, "Could not append RTA_OIF attribute: %m");
 579
 580         r = sd_netlink_call_async(link->manager->rtnl, req, callback, link, 0, NULL);
 581         if (r < 0)
 582                 return log_error_errno(r, "Could not send rtnetlink message: %m");
 583
 584         link_ref(link);
 585
 586         lifetime = route->lifetime;
 587
 588         r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, &route);
 589         if (r < 0)
 590                 return log_error_errno(r, "Could not add route: %m");
 591
 592         /* TODO: drop expiration handling once it can be pushed into the kernel */
 593         route->lifetime = lifetime;
 594
 595         if (route->lifetime != USEC_INFINITY) {
 596                 r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(),
 597                                       route->lifetime, 0, route_expire_handler, route);
 598                 if (r < 0)
 599                         return log_error_errno(r, "Could not arm expiration timer: %m");
 600         }
 601
 602         sd_event_source_unref(route->expire);
 603         route->expire = expire;
 604         expire = NULL;
 605
 606         return 0;
 607 }
 608
 609 int config_parse_gateway(const char *unit,
 610                 const char *filename,
 611                 unsigned line,
 612                 const char *section,
 613                 unsigned section_line,
 614                 const char *lvalue,
 615                 int ltype,
 616                 const char *rvalue,
 617                 void *data,
 618                 void *userdata) {
 619
 620         Network *network = userdata;
 621         _cleanup_route_free_ Route *n = NULL;
 622         union in_addr_union buffer;
 623         int r, f;
 624
 625         assert(filename);
 626         assert(section);
 627         assert(lvalue);
 628         assert(rvalue);
 629         assert(data);
 630
 631         if (streq(section, "Network")) {
 632                 /* we are not in an Route section, so treat
 633                  * this as the special '0' section */
 634                 section_line = 0;
 635         }
 636
 637         r = route_new_static(network, section_line, &n);
 638         if (r < 0)
 639                 return r;
 640
 641         r = in_addr_from_string_auto(rvalue, &f, &buffer);
 642         if (r < 0) {
 643                 log_syntax(unit, LOG_ERR, filename, line, r, "Route is invalid, ignoring assignment: %s", rvalue);
 644                 return 0;
 645         }
 646
 647         n->family = f;
 648         n->gw = buffer;
 649         n = NULL;
 650
 651         return 0;
 652 }
 653
 654 int config_parse_preferred_src(const char *unit,
 655                 const char *filename,
 656                 unsigned line,
 657                 const char *section,
 658                 unsigned section_line,
 659                 const char *lvalue,
 660                 int ltype,
 661                 const char *rvalue,
 662                 void *data,
 663                 void *userdata) {
 664
 665         Network *network = userdata;
 666         _cleanup_route_free_ Route *n = NULL;
 667         union in_addr_union buffer;
 668         int r, f;
 669
 670         assert(filename);
 671         assert(section);
 672         assert(lvalue);
 673         assert(rvalue);
 674         assert(data);
 675
 676         r = route_new_static(network, section_line, &n);
 677         if (r < 0)
 678                 return r;
 679
 680         r = in_addr_from_string_auto(rvalue, &f, &buffer);
 681         if (r < 0) {
 682                 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
 683                            "Preferred source is invalid, ignoring assignment: %s", rvalue);
 684                 return 0;
 685         }
 686
 687         n->family = f;
 688         n->prefsrc = buffer;
 689         n = NULL;
 690
 691         return 0;
 692 }
 693
 694 int config_parse_destination(const char *unit,
 695                 const char *filename,
 696                 unsigned line,
 697                 const char *section,
 698                 unsigned section_line,
 699                 const char *lvalue,
 700                 int ltype,
 701                 const char *rvalue,
 702                 void *data,
 703                 void *userdata) {
 704
 705         Network *network = userdata;
 706         _cleanup_route_free_ Route *n = NULL;
 707         const char *address, *e;
 708         union in_addr_union buffer;
 709         unsigned char prefixlen;
 710         int r, f;
 711
 712         assert(filename);
 713         assert(section);
 714         assert(lvalue);
 715         assert(rvalue);
 716         assert(data);
 717
 718         r = route_new_static(network, section_line, &n);
 719         if (r < 0)
 720                 return r;
 721
 722         /* Destination|Source=address/prefixlen */
 723
 724         /* address */
 725         e = strchr(rvalue, '/');
 726         if (e)
 727                 address = strndupa(rvalue, e - rvalue);
 728         else
 729                 address = rvalue;
 730
 731         r = in_addr_from_string_auto(address, &f, &buffer);
 732         if (r < 0) {
 733                 log_syntax(unit, LOG_ERR, filename, line, r, "Destination is invalid, ignoring assignment: %s", address);
 734                 return 0;
 735         }
 736
 737         if (f != AF_INET && f != AF_INET6) {
 738                 log_syntax(unit, LOG_ERR, filename, line, 0, "Unknown address family, ignoring assignment: %s", address);
 739                 return 0;
 740         }
 741
 742         /* prefixlen */
 743         if (e) {
 744                 r = safe_atou8(e + 1, &prefixlen);
 745                 if (r < 0) {
 746                         log_syntax(unit, LOG_ERR, filename, line, r, "Route destination prefix length is invalid, ignoring assignment: %s", e + 1);
 747                         return 0;
 748                 }
 749         } else {
 750                 switch (f) {
 751                         case AF_INET:
 752                                 prefixlen = 32;
 753                                 break;
 754                         case AF_INET6:
 755                                 prefixlen = 128;
 756                                 break;
 757                 }
 758         }
 759
 760         n->family = f;
 761         if (streq(lvalue, "Destination")) {
 762                 n->dst = buffer;
 763                 n->dst_prefixlen = prefixlen;
 764         } else if (streq(lvalue, "Source")) {
 765                 n->src = buffer;
 766                 n->src_prefixlen = prefixlen;
 767         } else
 768                 assert_not_reached(lvalue);
 769
 770         n = NULL;
 771
 772         return 0;
 773 }
 774
 775 int config_parse_route_priority(const char *unit,
 776                                 const char *filename,
 777                                 unsigned line,
 778                                 const char *section,
 779                                 unsigned section_line,
 780                                 const char *lvalue,
 781                                 int ltype,
 782                                 const char *rvalue,
 783                                 void *data,
 784                                 void *userdata) {
 785         Network *network = userdata;
 786         _cleanup_route_free_ Route *n = NULL;
 787         int r;
 788
 789         assert(filename);
 790         assert(section);
 791         assert(lvalue);
 792         assert(rvalue);
 793         assert(data);
 794
 795         r = route_new_static(network, section_line, &n);
 796         if (r < 0)
 797                 return r;
 798
 799         r = config_parse_uint32(unit, filename, line, section,
 800                                 section_line, lvalue, ltype,
 801                                 rvalue, &n->priority, userdata);
 802         if (r < 0)
 803                 return r;
 804
 805         n = NULL;
 806
 807         return 0;
 808 }
 809
 810 int config_parse_route_scope(const char *unit,
 811                              const char *filename,
 812                              unsigned line,
 813                              const char *section,
 814                              unsigned section_line,
 815                              const char *lvalue,
 816                              int ltype,
 817                              const char *rvalue,
 818                              void *data,
 819                              void *userdata) {
 820         Network *network = userdata;
 821         _cleanup_route_free_ Route *n = NULL;
 822         int r;
 823
 824         assert(filename);
 825         assert(section);
 826         assert(lvalue);
 827         assert(rvalue);
 828         assert(data);
 829
 830         r = route_new_static(network, section_line, &n);
 831         if (r < 0)
 832                 return r;
 833
 834         if (streq(rvalue, "host"))
 835                 n->scope = RT_SCOPE_HOST;
 836         else if (streq(rvalue, "link"))
 837                 n->scope = RT_SCOPE_LINK;
 838         else if (streq(rvalue, "global"))
 839                 n->scope = RT_SCOPE_UNIVERSE;
 840         else {
 841                 log_syntax(unit, LOG_ERR, filename, line, 0, "Unknown route scope: %s", rvalue);
 842                 return 0;
 843         }
 844
 845         n = NULL;
 846
 847         return 0;
 848 }
 849
 850 int config_parse_route_table(const char *unit,
 851                              const char *filename,
 852                              unsigned line,
 853                              const char *section,
 854                              unsigned section_line,
 855                              const char *lvalue,
 856                              int ltype,
 857                              const char *rvalue,
 858                              void *data,
 859                              void *userdata) {
 860         _cleanup_route_free_ Route *n = NULL;
 861         Network *network = userdata;
 862         uint32_t k;
 863         int r;
 864
 865         assert(filename);
 866         assert(section);
 867         assert(lvalue);
 868         assert(rvalue);
 869         assert(data);
 870
 871         r = route_new_static(network, section_line, &n);
 872         if (r < 0)
 873                 return r;
 874
 875         r = safe_atou32(rvalue, &k);
 876         if (r < 0) {
 877                 log_syntax(unit, LOG_ERR, filename, line, r,
 878                            "Could not parse route table number \"%s\", ignoring assignment: %m", rvalue);
 879                 return 0;
 880         }
 881
 882         n->table = k;
 883
 884         n = NULL;
 885
 886         return 0;
 887 }