src/network/networkd-manager.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <netinet/in.h>
   4 #include <sys/socket.h>
   5 #include <unistd.h>
   6 #include <linux/if.h>
   7 #include <linux/fib_rules.h>
   8 #include <linux/nexthop.h>
   9
  10 #include "sd-daemon.h"
  11 #include "sd-netlink.h"
  12
  13 #include "alloc-util.h"
  14 #include "bus-util.h"
  15 #include "conf-parser.h"
  16 #include "def.h"
  17 #include "device-private.h"
  18 #include "device-util.h"
  19 #include "dns-domain.h"
  20 #include "fd-util.h"
  21 #include "fileio.h"
  22 #include "local-addresses.h"
  23 #include "netlink-util.h"
  24 #include "network-internal.h"
  25 #include "networkd-dhcp6.h"
  26 #include "networkd-link-bus.h"
  27 #include "networkd-manager-bus.h"
  28 #include "networkd-manager.h"
  29 #include "networkd-network-bus.h"
  30 #include "networkd-speed-meter.h"
  31 #include "ordered-set.h"
  32 #include "path-util.h"
  33 #include "set.h"
  34 #include "signal-util.h"
  35 #include "strv.h"
  36 #include "sysctl-util.h"
  37 #include "tmpfile-util.h"
  38 #include "udev-util.h"
  39 #include "virt.h"
  40
  41 /* use 8 MB for receive socket kernel queue. */
  42 #define RCVBUF_SIZE    (8*1024*1024)
  43
  44 static int setup_default_address_pool(Manager *m) {
  45         AddressPool *p;
  46         int r;
  47
  48         assert(m);
  49
  50         /* Add in the well-known private address ranges. */
  51
  52         r = address_pool_new_from_string(m, &p, AF_INET6, "fd00::", 8);
  53         if (r < 0)
  54                 return r;
  55
  56         r = address_pool_new_from_string(m, &p, AF_INET, "10.0.0.0", 8);
  57         if (r < 0)
  58                 return r;
  59
  60         r = address_pool_new_from_string(m, &p, AF_INET, "172.16.0.0", 12);
  61         if (r < 0)
  62                 return r;
  63
  64         r = address_pool_new_from_string(m, &p, AF_INET, "192.168.0.0", 16);
  65         if (r < 0)
  66                 return r;
  67
  68         return 0;
  69 }
  70
  71 static int manager_reset_all(Manager *m) {
  72         Link *link;
  73         Iterator i;
  74         int r;
  75
  76         assert(m);
  77
  78         HASHMAP_FOREACH(link, m->links, i) {
  79                 r = link_carrier_reset(link);
  80                 if (r < 0)
  81                         log_link_warning_errno(link, r, "Could not reset carrier: %m");
  82         }
  83
  84         return 0;
  85 }
  86
  87 static int match_prepare_for_sleep(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
  88         Manager *m = userdata;
  89         int b, r;
  90
  91         assert(message);
  92         assert(m);
  93
  94         r = sd_bus_message_read(message, "b", &b);
  95         if (r < 0) {
  96                 log_debug_errno(r, "Failed to parse PrepareForSleep signal: %m");
  97                 return 0;
  98         }
  99
 100         if (b)
 101                 return 0;
 102
 103         log_debug("Coming back from suspend, resetting all connections...");
 104
 105         (void) manager_reset_all(m);
 106
 107         return 0;
 108 }
 109
 110 static int on_connected(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
 111         Manager *m = userdata;
 112
 113         assert(message);
 114         assert(m);
 115
 116         /* Did we get a timezone or transient hostname from DHCP while D-Bus wasn't up yet? */
 117         if (m->dynamic_hostname)
 118                 (void) manager_set_hostname(m, m->dynamic_hostname);
 119         if (m->dynamic_timezone)
 120                 (void) manager_set_timezone(m, m->dynamic_timezone);
 121         if (m->links_requesting_uuid)
 122                 (void) manager_request_product_uuid(m, NULL);
 123
 124         return 0;
 125 }
 126
 127 int manager_connect_bus(Manager *m) {
 128         int r;
 129
 130         assert(m);
 131
 132         if (m->bus)
 133                 return 0;
 134
 135         r = bus_open_system_watch_bind_with_description(&m->bus, "bus-api-network");
 136         if (r < 0)
 137                 return log_error_errno(r, "Failed to connect to bus: %m");
 138
 139         r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/network1", "org.freedesktop.network1.Manager", manager_vtable, m);
 140         if (r < 0)
 141                 return log_error_errno(r, "Failed to add manager object vtable: %m");
 142
 143         r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/link", "org.freedesktop.network1.Link", link_vtable, link_object_find, m);
 144         if (r < 0)
 145                return log_error_errno(r, "Failed to add link object vtable: %m");
 146
 147         r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/link", link_node_enumerator, m);
 148         if (r < 0)
 149                 return log_error_errno(r, "Failed to add link enumerator: %m");
 150
 151         r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/network", "org.freedesktop.network1.Network", network_vtable, network_object_find, m);
 152         if (r < 0)
 153                return log_error_errno(r, "Failed to add network object vtable: %m");
 154
 155         r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/network", network_node_enumerator, m);
 156         if (r < 0)
 157                 return log_error_errno(r, "Failed to add network enumerator: %m");
 158
 159         r = sd_bus_request_name_async(m->bus, NULL, "org.freedesktop.network1", 0, NULL, NULL);
 160         if (r < 0)
 161                 return log_error_errno(r, "Failed to request name: %m");
 162
 163         r = sd_bus_attach_event(m->bus, m->event, 0);
 164         if (r < 0)
 165                 return log_error_errno(r, "Failed to attach bus to event loop: %m");
 166
 167         r = sd_bus_match_signal_async(
 168                         m->bus,
 169                         NULL,
 170                         "org.freedesktop.DBus.Local",
 171                         NULL,
 172                         "org.freedesktop.DBus.Local",
 173                         "Connected",
 174                         on_connected, NULL, m);
 175         if (r < 0)
 176                 return log_error_errno(r, "Failed to request match on Connected signal: %m");
 177
 178         r = sd_bus_match_signal_async(
 179                         m->bus,
 180                         NULL,
 181                         "org.freedesktop.login1",
 182                         "/org/freedesktop/login1",
 183                         "org.freedesktop.login1.Manager",
 184                         "PrepareForSleep",
 185                         match_prepare_for_sleep, NULL, m);
 186         if (r < 0)
 187                 log_warning_errno(r, "Failed to request match for PrepareForSleep, ignoring: %m");
 188
 189         return 0;
 190 }
 191
 192 static int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) {
 193         Manager *m = userdata;
 194         DeviceAction action;
 195         Link *link = NULL;
 196         int r, ifindex;
 197
 198         assert(m);
 199         assert(device);
 200
 201         r = device_get_action(device, &action);
 202         if (r < 0) {
 203                 log_device_debug_errno(device, r, "Failed to get udev action, ignoring device: %m");
 204                 return 0;
 205         }
 206
 207         if (!IN_SET(action, DEVICE_ACTION_ADD, DEVICE_ACTION_CHANGE, DEVICE_ACTION_MOVE)) {
 208                 log_device_debug(device, "Ignoring udev %s event for device.", device_action_to_string(action));
 209                 return 0;
 210         }
 211
 212         r = sd_device_get_ifindex(device, &ifindex);
 213         if (r < 0) {
 214                 log_device_debug_errno(device, r, "Ignoring udev ADD event for device without ifindex or with invalid ifindex: %m");
 215                 return 0;
 216         }
 217
 218         r = device_is_renaming(device);
 219         if (r < 0) {
 220                 log_device_error_errno(device, r, "Failed to determine the device is renamed or not, ignoring '%s' uevent: %m",
 221                                        device_action_to_string(action));
 222                 return 0;
 223         }
 224         if (r > 0) {
 225                 log_device_debug(device, "Interface is under renaming, wait for the interface to be renamed: %m");
 226                 return 0;
 227         }
 228
 229         r = link_get(m, ifindex, &link);
 230         if (r < 0) {
 231                 if (r != -ENODEV)
 232                         log_debug_errno(r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
 233                 return 0;
 234         }
 235
 236         (void) link_initialized(link, device);
 237
 238         return 0;
 239 }
 240
 241 static int manager_connect_udev(Manager *m) {
 242         int r;
 243
 244         /* udev does not initialize devices inside containers,
 245          * so we rely on them being already initialized before
 246          * entering the container */
 247         if (detect_container() > 0)
 248                 return 0;
 249
 250         r = sd_device_monitor_new(&m->device_monitor);
 251         if (r < 0)
 252                 return log_error_errno(r, "Failed to initialize device monitor: %m");
 253
 254         r = sd_device_monitor_filter_add_match_subsystem_devtype(m->device_monitor, "net", NULL);
 255         if (r < 0)
 256                 return log_error_errno(r, "Could not add device monitor filter: %m");
 257
 258         r = sd_device_monitor_attach_event(m->device_monitor, m->event);
 259         if (r < 0)
 260                 return log_error_errno(r, "Failed to attach event to device monitor: %m");
 261
 262         r = sd_device_monitor_start(m->device_monitor, manager_udev_process_link, m);
 263         if (r < 0)
 264                 return log_error_errno(r, "Failed to start device monitor: %m");
 265
 266         return 0;
 267 }
 268
 269 int manager_rtnl_process_route(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 270         _cleanup_(route_freep) Route *tmp = NULL;
 271         Route *route = NULL;
 272         Manager *m = userdata;
 273         Link *link = NULL;
 274         uint32_t ifindex;
 275         uint16_t type;
 276         unsigned char table;
 277         int r;
 278
 279         assert(rtnl);
 280         assert(message);
 281         assert(m);
 282
 283         if (sd_netlink_message_is_error(message)) {
 284                 r = sd_netlink_message_get_errno(message);
 285                 if (r < 0)
 286                         log_warning_errno(r, "rtnl: failed to receive route message, ignoring: %m");
 287
 288                 return 0;
 289         }
 290
 291         r = sd_netlink_message_get_type(message, &type);
 292         if (r < 0) {
 293                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
 294                 return 0;
 295         } else if (!IN_SET(type, RTM_NEWROUTE, RTM_DELROUTE)) {
 296                 log_warning("rtnl: received unexpected message type %u when processing route, ignoring.", type);
 297                 return 0;
 298         }
 299
 300         r = sd_netlink_message_read_u32(message, RTA_OIF, &ifindex);
 301         if (r == -ENODATA) {
 302                 log_debug("rtnl: received route message without ifindex, ignoring");
 303                 return 0;
 304         } else if (r < 0) {
 305                 log_warning_errno(r, "rtnl: could not get ifindex from route message, ignoring: %m");
 306                 return 0;
 307         } else if (ifindex <= 0) {
 308                 log_warning("rtnl: received route message with invalid ifindex %d, ignoring.", ifindex);
 309                 return 0;
 310         }
 311
 312         r = link_get(m, ifindex, &link);
 313         if (r < 0 || !link) {
 314                 /* when enumerating we might be out of sync, but we will
 315                  * get the route again, so just ignore it */
 316                 if (!m->enumerating)
 317                         log_warning("rtnl: received route message for link (%d) we do not know about, ignoring", ifindex);
 318                 return 0;
 319         }
 320
 321         r = route_new(&tmp);
 322         if (r < 0)
 323                 return log_oom();
 324
 325         r = sd_rtnl_message_route_get_family(message, &tmp->family);
 326         if (r < 0 || !IN_SET(tmp->family, AF_INET, AF_INET6)) {
 327                 log_link_warning(link, "rtnl: received route message with invalid family, ignoring");
 328                 return 0;
 329         }
 330
 331         r = sd_rtnl_message_route_get_protocol(message, &tmp->protocol);
 332         if (r < 0) {
 333                 log_warning_errno(r, "rtnl: received route message with invalid route protocol: %m");
 334                 return 0;
 335         }
 336
 337         switch (tmp->family) {
 338         case AF_INET:
 339                 r = sd_netlink_message_read_in_addr(message, RTA_DST, &tmp->dst.in);
 340                 if (r < 0 && r != -ENODATA) {
 341                         log_link_warning_errno(link, r, "rtnl: received route message without valid destination, ignoring: %m");
 342                         return 0;
 343                 }
 344
 345                 r = sd_netlink_message_read_in_addr(message, RTA_GATEWAY, &tmp->gw.in);
 346                 if (r < 0 && r != -ENODATA) {
 347                         log_link_warning_errno(link, r, "rtnl: received route message without valid gateway, ignoring: %m");
 348                         return 0;
 349                 }
 350
 351                 r = sd_netlink_message_read_in_addr(message, RTA_SRC, &tmp->src.in);
 352                 if (r < 0 && r != -ENODATA) {
 353                         log_link_warning_errno(link, r, "rtnl: received route message without valid source, ignoring: %m");
 354                         return 0;
 355                 }
 356
 357                 r = sd_netlink_message_read_in_addr(message, RTA_PREFSRC, &tmp->prefsrc.in);
 358                 if (r < 0 && r != -ENODATA) {
 359                         log_link_warning_errno(link, r, "rtnl: received route message without valid preferred source, ignoring: %m");
 360                         return 0;
 361                 }
 362
 363                 break;
 364
 365         case AF_INET6:
 366                 r = sd_netlink_message_read_in6_addr(message, RTA_DST, &tmp->dst.in6);
 367                 if (r < 0 && r != -ENODATA) {
 368                         log_link_warning_errno(link, r, "rtnl: received route message without valid destination, ignoring: %m");
 369                         return 0;
 370                 }
 371
 372                 r = sd_netlink_message_read_in6_addr(message, RTA_GATEWAY, &tmp->gw.in6);
 373                 if (r < 0 && r != -ENODATA) {
 374                         log_link_warning_errno(link, r, "rtnl: received route message without valid gateway, ignoring: %m");
 375                         return 0;
 376                 }
 377
 378                 r = sd_netlink_message_read_in6_addr(message, RTA_SRC, &tmp->src.in6);
 379                 if (r < 0 && r != -ENODATA) {
 380                         log_link_warning_errno(link, r, "rtnl: received route message without valid source, ignoring: %m");
 381                         return 0;
 382                 }
 383
 384                 r = sd_netlink_message_read_in6_addr(message, RTA_PREFSRC, &tmp->prefsrc.in6);
 385                 if (r < 0 && r != -ENODATA) {
 386                         log_link_warning_errno(link, r, "rtnl: received route message without valid preferred source, ignoring: %m");
 387                         return 0;
 388                 }
 389
 390                 break;
 391
 392         default:
 393                 assert_not_reached("Received route message with unsupported address family");
 394                 return 0;
 395         }
 396
 397         r = sd_rtnl_message_route_get_dst_prefixlen(message, &tmp->dst_prefixlen);
 398         if (r < 0) {
 399                 log_link_warning_errno(link, r, "rtnl: received route message with invalid destination prefixlen, ignoring: %m");
 400                 return 0;
 401         }
 402
 403         r = sd_rtnl_message_route_get_src_prefixlen(message, &tmp->src_prefixlen);
 404         if (r < 0) {
 405                 log_link_warning_errno(link, r, "rtnl: received route message with invalid source prefixlen, ignoring: %m");
 406                 return 0;
 407         }
 408
 409         r = sd_rtnl_message_route_get_scope(message, &tmp->scope);
 410         if (r < 0) {
 411                 log_link_warning_errno(link, r, "rtnl: received route message with invalid scope, ignoring: %m");
 412                 return 0;
 413         }
 414
 415         r = sd_rtnl_message_route_get_tos(message, &tmp->tos);
 416         if (r < 0) {
 417                 log_link_warning_errno(link, r, "rtnl: received route message with invalid tos, ignoring: %m");
 418                 return 0;
 419         }
 420
 421         r = sd_rtnl_message_route_get_type(message, &tmp->type);
 422         if (r < 0) {
 423                 log_link_warning_errno(link, r, "rtnl: received route message with invalid type, ignoring: %m");
 424                 return 0;
 425         }
 426
 427         r = sd_rtnl_message_route_get_table(message, &table);
 428         if (r < 0) {
 429                 log_link_warning_errno(link, r, "rtnl: received route message with invalid table, ignoring: %m");
 430                 return 0;
 431         }
 432         tmp->table = table;
 433
 434         r = sd_netlink_message_read_u32(message, RTA_PRIORITY, &tmp->priority);
 435         if (r < 0 && r != -ENODATA) {
 436                 log_link_warning_errno(link, r, "rtnl: received route message with invalid priority, ignoring: %m");
 437                 return 0;
 438         }
 439
 440         r = sd_netlink_message_enter_container(message, RTA_METRICS);
 441         if (r < 0 && r != -ENODATA) {
 442                 log_link_error_errno(link, r, "rtnl: Could not enter RTA_METRICS container: %m");
 443                 return 0;
 444         }
 445         if (r >= 0) {
 446                 r = sd_netlink_message_read_u32(message, RTAX_INITCWND, &tmp->initcwnd);
 447                 if (r < 0 && r != -ENODATA) {
 448                         log_link_warning_errno(link, r, "rtnl: received route message with invalid initcwnd, ignoring: %m");
 449                         return 0;
 450                 }
 451
 452                 r = sd_netlink_message_read_u32(message, RTAX_INITRWND, &tmp->initrwnd);
 453                 if (r < 0 && r != -ENODATA) {
 454                         log_link_warning_errno(link, r, "rtnl: received route message with invalid initrwnd, ignoring: %m");
 455                         return 0;
 456                 }
 457
 458                 r = sd_netlink_message_exit_container(message);
 459                 if (r < 0) {
 460                         log_link_error_errno(link, r, "rtnl: Could not exit from RTA_METRICS container: %m");
 461                         return 0;
 462                 }
 463         }
 464
 465         (void) route_get(link, tmp, &route);
 466
 467         if (DEBUG_LOGGING) {
 468                 _cleanup_free_ char *buf_dst = NULL, *buf_dst_prefixlen = NULL,
 469                         *buf_src = NULL, *buf_gw = NULL, *buf_prefsrc = NULL;
 470                 char buf_scope[ROUTE_SCOPE_STR_MAX], buf_table[ROUTE_TABLE_STR_MAX],
 471                         buf_protocol[ROUTE_PROTOCOL_STR_MAX];
 472
 473                 if (!in_addr_is_null(tmp->family, &tmp->dst)) {
 474                         (void) in_addr_to_string(tmp->family, &tmp->dst, &buf_dst);
 475                         (void) asprintf(&buf_dst_prefixlen, "/%u", tmp->dst_prefixlen);
 476                 }
 477                 if (!in_addr_is_null(tmp->family, &tmp->src))
 478                         (void) in_addr_to_string(tmp->family, &tmp->src, &buf_src);
 479                 if (!in_addr_is_null(tmp->family, &tmp->gw))
 480                         (void) in_addr_to_string(tmp->family, &tmp->gw, &buf_gw);
 481                 if (!in_addr_is_null(tmp->family, &tmp->prefsrc))
 482                         (void) in_addr_to_string(tmp->family, &tmp->prefsrc, &buf_prefsrc);
 483
 484                 log_link_debug(link,
 485                                "%s route: dst: %s%s, src: %s, gw: %s, prefsrc: %s, scope: %s, table: %s, proto: %s, type: %s",
 486                                type == RTM_DELROUTE ? "Forgetting" : route ? "Received remembered" : "Remembering",
 487                                strna(buf_dst), strempty(buf_dst_prefixlen),
 488                                strna(buf_src), strna(buf_gw), strna(buf_prefsrc),
 489                                format_route_scope(tmp->scope, buf_scope, sizeof buf_scope),
 490                                format_route_table(tmp->table, buf_table, sizeof buf_table),
 491                                format_route_protocol(tmp->protocol, buf_protocol, sizeof buf_protocol),
 492                                strna(route_type_to_string(tmp->type)));
 493         }
 494
 495         switch (type) {
 496         case RTM_NEWROUTE:
 497                 if (!route) {
 498                         /* A route appeared that we did not request */
 499                         r = route_add_foreign(link, tmp, &route);
 500                         if (r < 0) {
 501                                 log_link_warning_errno(link, r, "Failed to remember foreign route, ignoring: %m");
 502                                 return 0;
 503                         }
 504                 }
 505
 506                 break;
 507
 508         case RTM_DELROUTE:
 509                 route_free(route);
 510                 break;
 511
 512         default:
 513                 assert_not_reached("Received route message with invalid RTNL message type");
 514         }
 515
 516         return 1;
 517 }
 518
 519 static int manager_rtnl_process_neighbor_lladdr(sd_netlink_message *message, union lladdr_union *lladdr, size_t *size, char **str) {
 520         int r;
 521
 522         assert(message);
 523         assert(lladdr);
 524         assert(size);
 525         assert(str);
 526
 527         *str = NULL;
 528
 529         r = sd_netlink_message_read(message, NDA_LLADDR, sizeof(lladdr->ip.in6), &lladdr->ip.in6);
 530         if (r >= 0) {
 531                 *size = sizeof(lladdr->ip.in6);
 532                 if (in_addr_to_string(AF_INET6, &lladdr->ip, str) < 0)
 533                         log_warning_errno(r, "Could not print lower address: %m");
 534                 return r;
 535         }
 536
 537         r = sd_netlink_message_read(message, NDA_LLADDR, sizeof(lladdr->mac), &lladdr->mac);
 538         if (r >= 0) {
 539                 *size = sizeof(lladdr->mac);
 540                 *str = new(char, ETHER_ADDR_TO_STRING_MAX);
 541                 if (!*str) {
 542                         log_oom();
 543                         return r;
 544                 }
 545                 ether_addr_to_string(&lladdr->mac, *str);
 546                 return r;
 547         }
 548
 549         r = sd_netlink_message_read(message, NDA_LLADDR, sizeof(lladdr->ip.in), &lladdr->ip.in);
 550         if (r >= 0) {
 551                 *size = sizeof(lladdr->ip.in);
 552                 if (in_addr_to_string(AF_INET, &lladdr->ip, str) < 0)
 553                         log_warning_errno(r, "Could not print lower address: %m");
 554                 return r;
 555         }
 556
 557         return r;
 558 }
 559
 560 int manager_rtnl_process_neighbor(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 561         Manager *m = userdata;
 562         Link *link = NULL;
 563         Neighbor *neighbor = NULL;
 564         int ifindex, family, r;
 565         uint16_t type, state;
 566         union in_addr_union in_addr = IN_ADDR_NULL;
 567         _cleanup_free_ char *addr_str = NULL;
 568         union lladdr_union lladdr;
 569         size_t lladdr_size = 0;
 570         _cleanup_free_ char *lladdr_str = NULL;
 571
 572         assert(rtnl);
 573         assert(message);
 574         assert(m);
 575
 576         if (sd_netlink_message_is_error(message)) {
 577                 r = sd_netlink_message_get_errno(message);
 578                 if (r < 0)
 579                         log_warning_errno(r, "rtnl: failed to receive neighbor message, ignoring: %m");
 580
 581                 return 0;
 582         }
 583
 584         r = sd_netlink_message_get_type(message, &type);
 585         if (r < 0) {
 586                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
 587                 return 0;
 588         } else if (!IN_SET(type, RTM_NEWNEIGH, RTM_DELNEIGH)) {
 589                 log_warning("rtnl: received unexpected message type %u when processing neighbor, ignoring.", type);
 590                 return 0;
 591         }
 592
 593         r = sd_rtnl_message_neigh_get_state(message, &state);
 594         if (r < 0) {
 595                 log_link_warning_errno(link, r, "rtnl: received neighbor message with invalid state, ignoring: %m");
 596                 return 0;
 597         } else if (!FLAGS_SET(state, NUD_PERMANENT)) {
 598                 log_debug("rtnl: received non-static neighbor, ignoring.");
 599                 return 0;
 600         }
 601
 602         r = sd_rtnl_message_neigh_get_ifindex(message, &ifindex);
 603         if (r < 0) {
 604                 log_warning_errno(r, "rtnl: could not get ifindex from message, ignoring: %m");
 605                 return 0;
 606         } else if (ifindex <= 0) {
 607                 log_warning("rtnl: received neighbor message with invalid ifindex %d, ignoring.", ifindex);
 608                 return 0;
 609         }
 610
 611         r = link_get(m, ifindex, &link);
 612         if (r < 0 || !link) {
 613                 /* when enumerating we might be out of sync, but we will get the neighbor again, so just
 614                  * ignore it */
 615                 if (!m->enumerating)
 616                         log_warning("rtnl: received neighbor for link '%d' we don't know about, ignoring.", ifindex);
 617                 return 0;
 618         }
 619
 620         r = sd_rtnl_message_neigh_get_family(message, &family);
 621         if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) {
 622                 log_link_warning(link, "rtnl: received neighbor message with invalid family, ignoring.");
 623                 return 0;
 624         }
 625
 626         switch (family) {
 627         case AF_INET:
 628                 r = sd_netlink_message_read_in_addr(message, NDA_DST, &in_addr.in);
 629                 if (r < 0) {
 630                         log_link_warning_errno(link, r, "rtnl: received neighbor message without valid address, ignoring: %m");
 631                         return 0;
 632                 }
 633
 634                 break;
 635
 636         case AF_INET6:
 637                 r = sd_netlink_message_read_in6_addr(message, NDA_DST, &in_addr.in6);
 638                 if (r < 0) {
 639                         log_link_warning_errno(link, r, "rtnl: received neighbor message without valid address, ignoring: %m");
 640                         return 0;
 641                 }
 642
 643                 break;
 644
 645         default:
 646                 assert_not_reached("Received unsupported address family");
 647         }
 648
 649         if (in_addr_to_string(family, &in_addr, &addr_str) < 0)
 650                 log_link_warning_errno(link, r, "Could not print address: %m");
 651
 652         r = manager_rtnl_process_neighbor_lladdr(message, &lladdr, &lladdr_size, &lladdr_str);
 653         if (r < 0) {
 654                 log_link_warning_errno(link, r, "rtnl: received neighbor message with invalid lladdr, ignoring: %m");
 655                 return 0;
 656         }
 657
 658         (void) neighbor_get(link, family, &in_addr, &lladdr, lladdr_size, &neighbor);
 659
 660         switch (type) {
 661         case RTM_NEWNEIGH:
 662                 if (neighbor)
 663                         log_link_debug(link, "Remembering neighbor: %s->%s",
 664                                        strnull(addr_str), strnull(lladdr_str));
 665                 else {
 666                         /* A neighbor appeared that we did not request */
 667                         r = neighbor_add_foreign(link, family, &in_addr, &lladdr, lladdr_size, &neighbor);
 668                         if (r < 0) {
 669                                 log_link_warning_errno(link, r, "Failed to remember foreign neighbor %s->%s, ignoring: %m",
 670                                                        strnull(addr_str), strnull(lladdr_str));
 671                                 return 0;
 672                         } else
 673                                 log_link_debug(link, "Remembering foreign neighbor: %s->%s",
 674                                                strnull(addr_str), strnull(lladdr_str));
 675                 }
 676
 677                 break;
 678
 679         case RTM_DELNEIGH:
 680                 if (neighbor) {
 681                         log_link_debug(link, "Forgetting neighbor: %s->%s",
 682                                        strnull(addr_str), strnull(lladdr_str));
 683                         (void) neighbor_free(neighbor);
 684                 } else
 685                         log_link_info(link, "Kernel removed a neighbor we don't remember: %s->%s, ignoring.",
 686                                       strnull(addr_str), strnull(lladdr_str));
 687
 688                 break;
 689
 690         default:
 691                 assert_not_reached("Received invalid RTNL message type");
 692         }
 693
 694         return 1;
 695 }
 696
 697 int manager_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 698         _cleanup_free_ char *buf = NULL;
 699         Manager *m = userdata;
 700         Link *link = NULL;
 701         uint16_t type;
 702         unsigned char flags, prefixlen, scope;
 703         union in_addr_union in_addr = IN_ADDR_NULL;
 704         struct ifa_cacheinfo cinfo;
 705         Address *address = NULL;
 706         char valid_buf[FORMAT_TIMESPAN_MAX];
 707         const char *valid_str = NULL;
 708         int ifindex, family, r;
 709
 710         assert(rtnl);
 711         assert(message);
 712         assert(m);
 713
 714         if (sd_netlink_message_is_error(message)) {
 715                 r = sd_netlink_message_get_errno(message);
 716                 if (r < 0)
 717                         log_warning_errno(r, "rtnl: failed to receive address message, ignoring: %m");
 718
 719                 return 0;
 720         }
 721
 722         r = sd_netlink_message_get_type(message, &type);
 723         if (r < 0) {
 724                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
 725                 return 0;
 726         } else if (!IN_SET(type, RTM_NEWADDR, RTM_DELADDR)) {
 727                 log_warning("rtnl: received unexpected message type %u when processing address, ignoring.", type);
 728                 return 0;
 729         }
 730
 731         r = sd_rtnl_message_addr_get_ifindex(message, &ifindex);
 732         if (r < 0) {
 733                 log_warning_errno(r, "rtnl: could not get ifindex from message, ignoring: %m");
 734                 return 0;
 735         } else if (ifindex <= 0) {
 736                 log_warning("rtnl: received address message with invalid ifindex %d, ignoring.", ifindex);
 737                 return 0;
 738         }
 739
 740         r = link_get(m, ifindex, &link);
 741         if (r < 0 || !link) {
 742                 /* when enumerating we might be out of sync, but we will get the address again, so just
 743                  * ignore it */
 744                 if (!m->enumerating)
 745                         log_warning("rtnl: received address for link '%d' we don't know about, ignoring.", ifindex);
 746                 return 0;
 747         }
 748
 749         r = sd_rtnl_message_addr_get_family(message, &family);
 750         if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) {
 751                 log_link_warning(link, "rtnl: received address message with invalid family, ignoring.");
 752                 return 0;
 753         }
 754
 755         r = sd_rtnl_message_addr_get_prefixlen(message, &prefixlen);
 756         if (r < 0) {
 757                 log_link_warning_errno(link, r, "rtnl: received address message with invalid prefixlen, ignoring: %m");
 758                 return 0;
 759         }
 760
 761         r = sd_rtnl_message_addr_get_scope(message, &scope);
 762         if (r < 0) {
 763                 log_link_warning_errno(link, r, "rtnl: received address message with invalid scope, ignoring: %m");
 764                 return 0;
 765         }
 766
 767         r = sd_rtnl_message_addr_get_flags(message, &flags);
 768         if (r < 0) {
 769                 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
 770                 return 0;
 771         }
 772
 773         switch (family) {
 774         case AF_INET:
 775                 r = sd_netlink_message_read_in_addr(message, IFA_LOCAL, &in_addr.in);
 776                 if (r < 0) {
 777                         log_link_warning_errno(link, r, "rtnl: received address message without valid address, ignoring: %m");
 778                         return 0;
 779                 }
 780
 781                 break;
 782
 783         case AF_INET6:
 784                 r = sd_netlink_message_read_in6_addr(message, IFA_ADDRESS, &in_addr.in6);
 785                 if (r < 0) {
 786                         log_link_warning_errno(link, r, "rtnl: received address message without valid address, ignoring: %m");
 787                         return 0;
 788                 }
 789
 790                 break;
 791
 792         default:
 793                 assert_not_reached("Received unsupported address family");
 794         }
 795
 796         r = in_addr_to_string(family, &in_addr, &buf);
 797         if (r < 0)
 798                 log_link_warning_errno(link, r, "Could not print address: %m");
 799
 800         r = sd_netlink_message_read_cache_info(message, IFA_CACHEINFO, &cinfo);
 801         if (r < 0 && r != -ENODATA) {
 802                 log_link_warning_errno(link, r, "rtnl: cannot get IFA_CACHEINFO attribute, ignoring: %m");
 803                 return 0;
 804         } else if (r >= 0 && cinfo.ifa_valid != CACHE_INFO_INFINITY_LIFE_TIME)
 805                 valid_str = format_timespan(valid_buf, FORMAT_TIMESPAN_MAX,
 806                                             cinfo.ifa_valid * USEC_PER_SEC,
 807                                             USEC_PER_SEC);
 808
 809         (void) address_get(link, family, &in_addr, prefixlen, &address);
 810
 811         switch (type) {
 812         case RTM_NEWADDR:
 813                 if (address)
 814                         log_link_debug(link, "Remembering updated address: %s/%u (valid %s%s)",
 815                                        strnull(buf), prefixlen,
 816                                        valid_str ? "for " : "forever", strempty(valid_str));
 817                 else {
 818                         /* An address appeared that we did not request */
 819                         r = address_add_foreign(link, family, &in_addr, prefixlen, &address);
 820                         if (r < 0) {
 821                                 log_link_warning_errno(link, r, "Failed to remember foreign address %s/%u, ignoring: %m",
 822                                                        strnull(buf), prefixlen);
 823                                 return 0;
 824                         } else
 825                                 log_link_debug(link, "Remembering foreign address: %s/%u (valid %s%s)",
 826                                                strnull(buf), prefixlen,
 827                                                valid_str ? "for " : "forever", strempty(valid_str));
 828                 }
 829
 830                 /* address_update() logs internally, so we don't need to. */
 831                 (void) address_update(address, flags, scope, &cinfo);
 832
 833                 break;
 834
 835         case RTM_DELADDR:
 836                 if (address) {
 837                         log_link_debug(link, "Forgetting address: %s/%u (valid %s%s)",
 838                                        strnull(buf), prefixlen,
 839                                        valid_str ? "for " : "forever", strempty(valid_str));
 840                         (void) address_drop(address);
 841                 } else
 842                         log_link_info(link, "Kernel removed an address we don't remember: %s/%u (valid %s%s), ignoring.",
 843                                       strnull(buf), prefixlen,
 844                                       valid_str ? "for " : "forever", strempty(valid_str));
 845
 846                 break;
 847
 848         default:
 849                 assert_not_reached("Received invalid RTNL message type");
 850         }
 851
 852         return 1;
 853 }
 854
 855 static int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 856         Manager *m = userdata;
 857         Link *link = NULL;
 858         NetDev *netdev = NULL;
 859         uint16_t type;
 860         const char *name;
 861         int r, ifindex;
 862
 863         assert(rtnl);
 864         assert(message);
 865         assert(m);
 866
 867         if (sd_netlink_message_is_error(message)) {
 868                 r = sd_netlink_message_get_errno(message);
 869                 if (r < 0)
 870                         log_warning_errno(r, "rtnl: Could not receive link message, ignoring: %m");
 871
 872                 return 0;
 873         }
 874
 875         r = sd_netlink_message_get_type(message, &type);
 876         if (r < 0) {
 877                 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
 878                 return 0;
 879         } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
 880                 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
 881                 return 0;
 882         }
 883
 884         r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
 885         if (r < 0) {
 886                 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
 887                 return 0;
 888         } else if (ifindex <= 0) {
 889                 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
 890                 return 0;
 891         }
 892
 893         r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
 894         if (r < 0) {
 895                 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
 896                 return 0;
 897         }
 898
 899         (void) link_get(m, ifindex, &link);
 900         (void) netdev_get(m, name, &netdev);
 901
 902         switch (type) {
 903         case RTM_NEWLINK:
 904                 if (!link) {
 905                         /* link is new, so add it */
 906                         r = link_add(m, message, &link);
 907                         if (r < 0) {
 908                                 log_warning_errno(r, "Could not process new link message, ignoring: %m");
 909                                 return 0;
 910                         }
 911                 }
 912
 913                 if (netdev) {
 914                         /* netdev exists, so make sure the ifindex matches */
 915                         r = netdev_set_ifindex(netdev, message);
 916                         if (r < 0) {
 917                                 log_warning_errno(r, "Could not process new link message for netdev, ignoring: %m");
 918                                 return 0;
 919                         }
 920                 }
 921
 922                 r = link_update(link, message);
 923                 if (r < 0) {
 924                         log_warning_errno(r, "Could not process link message, ignoring: %m");
 925                         return 0;
 926                 }
 927
 928                 break;
 929
 930         case RTM_DELLINK:
 931                 link_drop(link);
 932                 netdev_drop(netdev);
 933
 934                 break;
 935
 936         default:
 937                 assert_not_reached("Received link message with invalid RTNL message type.");
 938         }
 939
 940         return 1;
 941 }
 942
 943 int manager_rtnl_process_rule(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 944         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *tmp = NULL;
 945         _cleanup_free_ char *from = NULL, *to = NULL;
 946         RoutingPolicyRule *rule = NULL;
 947         const char *iif = NULL, *oif = NULL;
 948         Manager *m = userdata;
 949         unsigned flags;
 950         uint16_t type;
 951         int r;
 952
 953         assert(rtnl);
 954         assert(message);
 955         assert(m);
 956
 957         if (sd_netlink_message_is_error(message)) {
 958                 r = sd_netlink_message_get_errno(message);
 959                 if (r < 0)
 960                         log_warning_errno(r, "rtnl: failed to receive rule message, ignoring: %m");
 961
 962                 return 0;
 963         }
 964
 965         r = sd_netlink_message_get_type(message, &type);
 966         if (r < 0) {
 967                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
 968                 return 0;
 969         } else if (!IN_SET(type, RTM_NEWRULE, RTM_DELRULE)) {
 970                 log_warning("rtnl: received unexpected message type %u when processing rule, ignoring.", type);
 971                 return 0;
 972         }
 973
 974         r = routing_policy_rule_new(&tmp);
 975         if (r < 0) {
 976                 log_oom();
 977                 return 0;
 978         }
 979
 980         r = sd_rtnl_message_get_family(message, &tmp->family);
 981         if (r < 0) {
 982                 log_warning_errno(r, "rtnl: could not get rule family, ignoring: %m");
 983                 return 0;
 984         } else if (!IN_SET(tmp->family, AF_INET, AF_INET6)) {
 985                 log_debug("rtnl: received rule message with invalid family %d, ignoring.", tmp->family);
 986                 return 0;
 987         }
 988
 989         switch (tmp->family) {
 990         case AF_INET:
 991                 r = sd_netlink_message_read_in_addr(message, FRA_SRC, &tmp->from.in);
 992                 if (r < 0 && r != -ENODATA) {
 993                         log_warning_errno(r, "rtnl: could not get FRA_SRC attribute, ignoring: %m");
 994                         return 0;
 995                 } else if (r >= 0) {
 996                         r = sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(message, &tmp->from_prefixlen);
 997                         if (r < 0) {
 998                                 log_warning_errno(r, "rtnl: received rule message without valid source prefix length, ignoring: %m");
 999                                 return 0;
1000                         }
1001                 }
1002
1003                 r = sd_netlink_message_read_in_addr(message, FRA_DST, &tmp->to.in);
1004                 if (r < 0 && r != -ENODATA) {
1005                         log_warning_errno(r, "rtnl: could not get FRA_DST attribute, ignoring: %m");
1006                         return 0;
1007                 } else if (r >= 0) {
1008                         r = sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(message, &tmp->to_prefixlen);
1009                         if (r < 0) {
1010                                 log_warning_errno(r, "rtnl: received rule message without valid destination prefix length, ignoring: %m");
1011                                 return 0;
1012                         }
1013                 }
1014
1015                 break;
1016
1017         case AF_INET6:
1018                 r = sd_netlink_message_read_in6_addr(message, FRA_SRC, &tmp->from.in6);
1019                 if (r < 0 && r != -ENODATA) {
1020                         log_warning_errno(r, "rtnl: could not get FRA_SRC attribute, ignoring: %m");
1021                         return 0;
1022                 } else if (r >= 0) {
1023                         r = sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(message, &tmp->from_prefixlen);
1024                         if (r < 0) {
1025                                 log_warning_errno(r, "rtnl: received rule message without valid source prefix length, ignoring: %m");
1026                                 return 0;
1027                         }
1028                 }
1029
1030                 r = sd_netlink_message_read_in6_addr(message, FRA_DST, &tmp->to.in6);
1031                 if (r < 0 && r != -ENODATA) {
1032                         log_warning_errno(r, "rtnl: could not get FRA_DST attribute, ignoring: %m");
1033                         return 0;
1034                 } else if (r >= 0) {
1035                         r = sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(message, &tmp->to_prefixlen);
1036                         if (r < 0) {
1037                                 log_warning_errno(r, "rtnl: received rule message without valid destination prefix length, ignoring: %m");
1038                                 return 0;
1039                         }
1040                 }
1041
1042                 break;
1043
1044         default:
1045                 assert_not_reached("Received rule message with unsupported address family");
1046         }
1047
1048         if (tmp->from_prefixlen == 0 && tmp->to_prefixlen == 0)
1049                 return 0;
1050
1051         r = sd_rtnl_message_routing_policy_rule_get_flags(message, &flags);
1052         if (r < 0) {
1053                 log_warning_errno(r, "rtnl: received rule message without valid flag, ignoring: %m");
1054                 return 0;
1055         }
1056         tmp->invert_rule = flags & FIB_RULE_INVERT;
1057
1058         r = sd_netlink_message_read_u32(message, FRA_FWMARK, &tmp->fwmark);
1059         if (r < 0 && r != -ENODATA) {
1060                 log_warning_errno(r, "rtnl: could not get FRA_FWMARK attribute, ignoring: %m");
1061                 return 0;
1062         }
1063
1064         r = sd_netlink_message_read_u32(message, FRA_FWMASK, &tmp->fwmask);
1065         if (r < 0 && r != -ENODATA) {
1066                 log_warning_errno(r, "rtnl: could not get FRA_FWMASK attribute, ignoring: %m");
1067                 return 0;
1068         }
1069
1070         r = sd_netlink_message_read_u32(message, FRA_PRIORITY, &tmp->priority);
1071         if (r < 0 && r != -ENODATA) {
1072                 log_warning_errno(r, "rtnl: could not get FRA_PRIORITY attribute, ignoring: %m");
1073                 return 0;
1074         }
1075
1076         r = sd_netlink_message_read_u32(message, FRA_TABLE, &tmp->table);
1077         if (r < 0 && r != -ENODATA) {
1078                 log_warning_errno(r, "rtnl: could not get FRA_TABLE attribute, ignoring: %m");
1079                 return 0;
1080         }
1081
1082         r = sd_rtnl_message_routing_policy_rule_get_tos(message, &tmp->tos);
1083         if (r < 0 && r != -ENODATA) {
1084                 log_warning_errno(r, "rtnl: could not get ip rule TOS, ignoring: %m");
1085                 return 0;
1086         }
1087
1088         r = sd_netlink_message_read_string(message, FRA_IIFNAME, &iif);
1089         if (r < 0 && r != -ENODATA) {
1090                 log_warning_errno(r, "rtnl: could not get FRA_IIFNAME attribute, ignoring: %m");
1091                 return 0;
1092         }
1093         r = free_and_strdup(&tmp->iif, iif);
1094         if (r < 0)
1095                 return log_oom();
1096
1097         r = sd_netlink_message_read_string(message, FRA_OIFNAME, &oif);
1098         if (r < 0 && r != -ENODATA) {
1099                 log_warning_errno(r, "rtnl: could not get FRA_OIFNAME attribute, ignoring: %m");
1100                 return 0;
1101         }
1102         r = free_and_strdup(&tmp->oif, oif);
1103         if (r < 0)
1104                 return log_oom();
1105
1106         r = sd_netlink_message_read_u8(message, FRA_IP_PROTO, &tmp->protocol);
1107         if (r < 0 && r != -ENODATA) {
1108                 log_warning_errno(r, "rtnl: could not get FRA_IP_PROTO attribute, ignoring: %m");
1109                 return 0;
1110         }
1111
1112         r = sd_netlink_message_read(message, FRA_SPORT_RANGE, sizeof(tmp->sport), &tmp->sport);
1113         if (r < 0 && r != -ENODATA) {
1114                 log_warning_errno(r, "rtnl: could not get FRA_SPORT_RANGE attribute, ignoring: %m");
1115                 return 0;
1116         }
1117
1118         r = sd_netlink_message_read(message, FRA_DPORT_RANGE, sizeof(tmp->dport), &tmp->dport);
1119         if (r < 0 && r != -ENODATA) {
1120                 log_warning_errno(r, "rtnl: could not get FRA_DPORT_RANGE attribute, ignoring: %m");
1121                 return 0;
1122         }
1123
1124         (void) routing_policy_rule_get(m, tmp, &rule);
1125
1126         if (DEBUG_LOGGING) {
1127                 (void) in_addr_to_string(tmp->family, &tmp->from, &from);
1128                 (void) in_addr_to_string(tmp->family, &tmp->to, &to);
1129         }
1130
1131         switch (type) {
1132         case RTM_NEWRULE:
1133                 if (!rule) {
1134                         log_debug("Remembering foreign routing policy rule: %s/%u -> %s/%u, iif: %s, oif: %s, table: %u",
1135                                   from, tmp->from_prefixlen, to, tmp->to_prefixlen, strna(tmp->iif), strna(tmp->oif), tmp->table);
1136                         r = routing_policy_rule_add_foreign(m, tmp, &rule);
1137                         if (r < 0) {
1138                                 log_warning_errno(r, "Could not remember foreign rule, ignoring: %m");
1139                                 return 0;
1140                         }
1141                 }
1142                 break;
1143         case RTM_DELRULE:
1144                 log_debug("Forgetting routing policy rule: %s/%u -> %s/%u, iif: %s, oif: %s, table: %u",
1145                           from, tmp->from_prefixlen, to, tmp->to_prefixlen, strna(tmp->iif), strna(tmp->oif), tmp->table);
1146                 routing_policy_rule_free(rule);
1147
1148                 break;
1149
1150         default:
1151                 assert_not_reached("Received invalid RTNL message type");
1152         }
1153
1154         return 1;
1155 }
1156
1157 int manager_rtnl_process_nexthop(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
1158         _cleanup_(nexthop_freep) NextHop *tmp = NULL;
1159         _cleanup_free_ char *gateway = NULL;
1160         NextHop *nexthop = NULL;
1161         Manager *m = userdata;
1162         Link *link = NULL;
1163         uint16_t type;
1164         int r;
1165
1166         assert(rtnl);
1167         assert(message);
1168         assert(m);
1169
1170         if (sd_netlink_message_is_error(message)) {
1171                 r = sd_netlink_message_get_errno(message);
1172                 if (r < 0)
1173                         log_warning_errno(r, "rtnl: failed to receive rule message, ignoring: %m");
1174
1175                 return 0;
1176         }
1177
1178         r = sd_netlink_message_get_type(message, &type);
1179         if (r < 0) {
1180                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
1181                 return 0;
1182         } else if (!IN_SET(type, RTM_NEWNEXTHOP, RTM_DELNEXTHOP)) {
1183                 log_warning("rtnl: received unexpected message type %u when processing nexthop, ignoring.", type);
1184                 return 0;
1185         }
1186
1187         r = nexthop_new(&tmp);
1188         if (r < 0)
1189                 return log_oom();
1190
1191         r = sd_rtnl_message_get_family(message, &tmp->family);
1192         if (r < 0) {
1193                 log_warning_errno(r, "rtnl: could not get nexthop family, ignoring: %m");
1194                 return 0;
1195         } else if (!IN_SET(tmp->family, AF_INET, AF_INET6)) {
1196                 log_debug("rtnl: received nexthop message with invalid family %d, ignoring.", tmp->family);
1197                 return 0;
1198         }
1199
1200         switch (tmp->family) {
1201         case AF_INET:
1202                 r = sd_netlink_message_read_in_addr(message, NHA_GATEWAY, &tmp->gw.in);
1203                 if (r < 0 && r != -ENODATA) {
1204                         log_warning_errno(r, "rtnl: could not get NHA_GATEWAY attribute, ignoring: %m");
1205                         return 0;
1206                 }
1207                 break;
1208
1209         case AF_INET6:
1210                 r = sd_netlink_message_read_in6_addr(message, NHA_GATEWAY, &tmp->gw.in6);
1211                 if (r < 0 && r != -ENODATA) {
1212                         log_warning_errno(r, "rtnl: could not get NHA_GATEWAY attribute, ignoring: %m");
1213                         return 0;
1214                 }
1215                 break;
1216
1217         default:
1218                 assert_not_reached("Received rule message with unsupported address family");
1219         }
1220
1221         r = sd_netlink_message_read_u32(message, NHA_ID, &tmp->id);
1222         if (r < 0 && r != -ENODATA) {
1223                 log_warning_errno(r, "rtnl: could not get NHA_ID attribute, ignoring: %m");
1224                 return 0;
1225         }
1226
1227         r = sd_netlink_message_read_u32(message, NHA_OIF, &tmp->oif);
1228         if (r < 0 && r != -ENODATA) {
1229                 log_warning_errno(r, "rtnl: could not get NHA_OIF attribute, ignoring: %m");
1230                 return 0;
1231         }
1232
1233         r = link_get(m, tmp->oif, &link);
1234         if (r < 0 || !link) {
1235                 if (!m->enumerating)
1236                         log_warning("rtnl: received nexthop message for link (%d) we do not know about, ignoring", tmp->oif);
1237                 return 0;
1238         }
1239
1240         (void) nexthop_get(link, tmp, &nexthop);
1241
1242         if (DEBUG_LOGGING)
1243                 (void) in_addr_to_string(tmp->family, &tmp->gw, &gateway);
1244
1245         switch (type) {
1246         case RTM_NEWNEXTHOP:
1247                 if (!nexthop) {
1248                         log_debug("Remembering foreign nexthop: %s, oif: %d, id: %d", gateway, tmp->oif, tmp->id);
1249                         r = nexthop_add_foreign(link, tmp, &nexthop);
1250                         if (r < 0) {
1251                                 log_warning_errno(r, "Could not remember foreign nexthop, ignoring: %m");
1252                                 return 0;
1253                         }
1254                 }
1255                 break;
1256         case RTM_DELNEXTHOP:
1257                 log_debug("Forgetting foreign nexthop: %s, oif: %d, id: %d", gateway, tmp->oif, tmp->id);
1258                 nexthop_free(nexthop);
1259
1260                 break;
1261
1262         default:
1263                 assert_not_reached("Received invalid RTNL message type");
1264         }
1265
1266         return 1;
1267 }
1268
1269 static int systemd_netlink_fd(void) {
1270         int n, fd, rtnl_fd = -EINVAL;
1271
1272         n = sd_listen_fds(true);
1273         if (n <= 0)
1274                 return -EINVAL;
1275
1276         for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++) {
1277                 if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) {
1278                         if (rtnl_fd >= 0)
1279                                 return -EINVAL;
1280
1281                         rtnl_fd = fd;
1282                 }
1283         }
1284
1285         return rtnl_fd;
1286 }
1287
1288 static int manager_connect_genl(Manager *m) {
1289         int r;
1290
1291         assert(m);
1292
1293         r = sd_genl_socket_open(&m->genl);
1294         if (r < 0)
1295                 return r;
1296
1297         r = sd_netlink_inc_rcvbuf(m->genl, RCVBUF_SIZE);
1298         if (r < 0)
1299                 return r;
1300
1301         r = sd_netlink_attach_event(m->genl, m->event, 0);
1302         if (r < 0)
1303                 return r;
1304
1305         return 0;
1306 }
1307
1308 static int manager_connect_rtnl(Manager *m) {
1309         int fd, r;
1310
1311         assert(m);
1312
1313         fd = systemd_netlink_fd();
1314         if (fd < 0)
1315                 r = sd_netlink_open(&m->rtnl);
1316         else
1317                 r = sd_netlink_open_fd(&m->rtnl, fd);
1318         if (r < 0)
1319                 return r;
1320
1321         r = sd_netlink_inc_rcvbuf(m->rtnl, RCVBUF_SIZE);
1322         if (r < 0)
1323                 return r;
1324
1325         r = sd_netlink_attach_event(m->rtnl, m->event, 0);
1326         if (r < 0)
1327                 return r;
1328
1329         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link");
1330         if (r < 0)
1331                 return r;
1332
1333         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link");
1334         if (r < 0)
1335                 return r;
1336
1337         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address");
1338         if (r < 0)
1339                 return r;
1340
1341         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address");
1342         if (r < 0)
1343                 return r;
1344
1345         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWNEIGH, &manager_rtnl_process_neighbor, NULL, m, "network-rtnl_process_neighbor");
1346         if (r < 0)
1347                 return r;
1348
1349         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELNEIGH, &manager_rtnl_process_neighbor, NULL, m, "network-rtnl_process_neighbor");
1350         if (r < 0)
1351                 return r;
1352
1353         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route");
1354         if (r < 0)
1355                 return r;
1356
1357         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route");
1358         if (r < 0)
1359                 return r;
1360
1361         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule");
1362         if (r < 0)
1363                 return r;
1364
1365         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule");
1366         if (r < 0)
1367                 return r;
1368
1369         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWNEXTHOP, &manager_rtnl_process_nexthop, NULL, m, "network-rtnl_process_nexthop");
1370         if (r < 0)
1371                 return r;
1372
1373         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELNEXTHOP, &manager_rtnl_process_nexthop, NULL, m, "network-rtnl_process_nexthop");
1374         if (r < 0)
1375                 return r;
1376
1377         return 0;
1378 }
1379
1380 static int ordered_set_put_in_addr_data(OrderedSet *s, const struct in_addr_data *address) {
1381         char *p;
1382         int r;
1383
1384         assert(s);
1385         assert(address);
1386
1387         r = in_addr_to_string(address->family, &address->address, &p);
1388         if (r < 0)
1389                 return r;
1390
1391         r = ordered_set_consume(s, p);
1392         if (r == -EEXIST)
1393                 return 0;
1394
1395         return r;
1396 }
1397
1398 static int ordered_set_put_in_addr_datav(OrderedSet *s, const struct in_addr_data *addresses, unsigned n) {
1399         int r, c = 0;
1400         unsigned i;
1401
1402         assert(s);
1403         assert(addresses || n == 0);
1404
1405         for (i = 0; i < n; i++) {
1406                 r = ordered_set_put_in_addr_data(s, addresses+i);
1407                 if (r < 0)
1408                         return r;
1409
1410                 c += r;
1411         }
1412
1413         return c;
1414 }
1415
1416 static int ordered_set_put_in4_addr(OrderedSet *s, const struct in_addr *address) {
1417         char *p;
1418         int r;
1419
1420         assert(s);
1421         assert(address);
1422
1423         r = in_addr_to_string(AF_INET, (const union in_addr_union*) address, &p);
1424         if (r < 0)
1425                 return r;
1426
1427         r = ordered_set_consume(s, p);
1428         if (r == -EEXIST)
1429                 return 0;
1430
1431         return r;
1432 }
1433
1434 static int ordered_set_put_in4_addrv(OrderedSet *s,
1435                                      const struct in_addr *addresses,
1436                                      size_t n,
1437                                      bool (*predicate)(const struct in_addr *addr)) {
1438         int r, c = 0;
1439         size_t i;
1440
1441         assert(s);
1442         assert(n == 0 || addresses);
1443
1444         for (i = 0; i < n; i++) {
1445                 if (predicate && !predicate(&addresses[i]))
1446                         continue;
1447                 r = ordered_set_put_in4_addr(s, addresses+i);
1448                 if (r < 0)
1449                         return r;
1450
1451                 c += r;
1452         }
1453
1454         return c;
1455 }
1456
1457 static int manager_save(Manager *m) {
1458         _cleanup_ordered_set_free_free_ OrderedSet *dns = NULL, *ntp = NULL, *sip = NULL, *search_domains = NULL, *route_domains = NULL;
1459         const char *operstate_str, *carrier_state_str, *address_state_str;
1460         LinkOperationalState operstate = LINK_OPERSTATE_OFF;
1461         LinkCarrierState carrier_state = LINK_CARRIER_STATE_OFF;
1462         LinkAddressState address_state = LINK_ADDRESS_STATE_OFF;
1463         _cleanup_free_ char *temp_path = NULL;
1464         _cleanup_strv_free_ char **p = NULL;
1465         _cleanup_fclose_ FILE *f = NULL;
1466         Link *link;
1467         Iterator i;
1468         int r;
1469
1470         assert(m);
1471         assert(m->state_file);
1472
1473         /* We add all NTP and DNS server to a set, to filter out duplicates */
1474         dns = ordered_set_new(&string_hash_ops);
1475         if (!dns)
1476                 return -ENOMEM;
1477
1478         ntp = ordered_set_new(&string_hash_ops);
1479         if (!ntp)
1480                 return -ENOMEM;
1481
1482        sip = ordered_set_new(&string_hash_ops);
1483        if (!sip)
1484                 return -ENOMEM;
1485
1486         search_domains = ordered_set_new(&dns_name_hash_ops);
1487         if (!search_domains)
1488                 return -ENOMEM;
1489
1490         route_domains = ordered_set_new(&dns_name_hash_ops);
1491         if (!route_domains)
1492                 return -ENOMEM;
1493
1494         HASHMAP_FOREACH(link, m->links, i) {
1495                 if (link->flags & IFF_LOOPBACK)
1496                         continue;
1497
1498                 if (link->operstate > operstate)
1499                         operstate = link->operstate;
1500
1501                 if (link->carrier_state > carrier_state)
1502                         carrier_state = link->carrier_state;
1503
1504                 if (link->address_state > address_state)
1505                         address_state = link->address_state;
1506
1507                 if (!link->network)
1508                         continue;
1509
1510                 /* First add the static configured entries */
1511                 r = ordered_set_put_in_addr_datav(dns, link->network->dns, link->network->n_dns);
1512                 if (r < 0)
1513                         return r;
1514
1515                 r = ordered_set_put_strdupv(ntp, link->ntp ?: link->network->ntp);
1516                 if (r < 0)
1517                         return r;
1518
1519                 r = ordered_set_put_string_set(search_domains, link->search_domains ?: link->network->search_domains);
1520                 if (r < 0)
1521                         return r;
1522
1523                 r = ordered_set_put_string_set(route_domains, link->route_domains ?: link->network->route_domains);
1524                 if (r < 0)
1525                         return r;
1526
1527                 if (!link->dhcp_lease)
1528                         continue;
1529
1530                 /* Secondly, add the entries acquired via DHCP */
1531                 if (link->network->dhcp_use_dns) {
1532                         const struct in_addr *addresses;
1533
1534                         r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
1535                         if (r > 0) {
1536                                 r = ordered_set_put_in4_addrv(dns, addresses, r, in4_addr_is_non_local);
1537                                 if (r < 0)
1538                                         return r;
1539                         } else if (r < 0 && r != -ENODATA)
1540                                 return r;
1541                 }
1542
1543                 if (link->network->dhcp_use_ntp) {
1544                         const struct in_addr *addresses;
1545
1546                         r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
1547                         if (r > 0) {
1548                                 r = ordered_set_put_in4_addrv(ntp, addresses, r, in4_addr_is_non_local);
1549                                 if (r < 0)
1550                                         return r;
1551                         } else if (r < 0 && r != -ENODATA)
1552                                 return r;
1553                 }
1554
1555                 if (link->network->dhcp_use_sip) {
1556                         const struct in_addr *addresses;
1557
1558                         r = sd_dhcp_lease_get_sip(link->dhcp_lease, &addresses);
1559                         if (r > 0) {
1560                                 r = ordered_set_put_in4_addrv(sip, addresses, r, in4_addr_is_non_local);
1561                                 if (r < 0)
1562                                         return r;
1563                         } else if (r < 0 && r != -ENODATA)
1564                                 return r;
1565                 }
1566
1567                 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
1568                         const char *domainname;
1569                         char **domains = NULL;
1570
1571                         OrderedSet *target_domains = (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) ? search_domains : route_domains;
1572                         r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname);
1573                         if (r >= 0) {
1574                                 r = ordered_set_put_strdup(target_domains, domainname);
1575                                 if (r < 0)
1576                                         return r;
1577                         } else if (r != -ENODATA)
1578                                 return r;
1579
1580                         r = sd_dhcp_lease_get_search_domains(link->dhcp_lease, &domains);
1581                         if (r >= 0) {
1582                                 r = ordered_set_put_strdupv(target_domains, domains);
1583                                 if (r < 0)
1584                                         return r;
1585                         } else if (r != -ENODATA)
1586                                 return r;
1587                 }
1588         }
1589
1590         if (carrier_state >= LINK_CARRIER_STATE_ENSLAVED)
1591                 carrier_state = LINK_CARRIER_STATE_CARRIER;
1592
1593         operstate_str = link_operstate_to_string(operstate);
1594         assert(operstate_str);
1595
1596         carrier_state_str = link_carrier_state_to_string(carrier_state);
1597         assert(carrier_state_str);
1598
1599         address_state_str = link_address_state_to_string(address_state);
1600         assert(address_state_str);
1601
1602         r = fopen_temporary(m->state_file, &f, &temp_path);
1603         if (r < 0)
1604                 return r;
1605
1606         (void) fchmod(fileno(f), 0644);
1607
1608         fprintf(f,
1609                 "# This is private data. Do not parse.\n"
1610                 "OPER_STATE=%s\n"
1611                 "CARRIER_STATE=%s\n"
1612                 "ADDRESS_STATE=%s\n",
1613                 operstate_str, carrier_state_str, address_state_str);
1614
1615         ordered_set_print(f, "DNS=", dns);
1616         ordered_set_print(f, "NTP=", ntp);
1617         ordered_set_print(f, "SIP=", sip);
1618         ordered_set_print(f, "DOMAINS=", search_domains);
1619         ordered_set_print(f, "ROUTE_DOMAINS=", route_domains);
1620
1621         r = routing_policy_serialize_rules(m->rules, f);
1622         if (r < 0)
1623                 goto fail;
1624
1625         r = fflush_and_check(f);
1626         if (r < 0)
1627                 goto fail;
1628
1629         if (rename(temp_path, m->state_file) < 0) {
1630                 r = -errno;
1631                 goto fail;
1632         }
1633
1634         if (m->operational_state != operstate) {
1635                 m->operational_state = operstate;
1636                 if (strv_extend(&p, "OperationalState") < 0)
1637                         log_oom();
1638         }
1639
1640         if (m->carrier_state != carrier_state) {
1641                 m->carrier_state = carrier_state;
1642                 if (strv_extend(&p, "CarrierState") < 0)
1643                         log_oom();
1644         }
1645
1646         if (m->address_state != address_state) {
1647                 m->address_state = address_state;
1648                 if (strv_extend(&p, "AddressState") < 0)
1649                         log_oom();
1650         }
1651
1652         if (p) {
1653                 r = manager_send_changed_strv(m, p);
1654                 if (r < 0)
1655                         log_error_errno(r, "Could not emit changed properties: %m");
1656         }
1657
1658         m->dirty = false;
1659
1660         return 0;
1661
1662 fail:
1663         (void) unlink(m->state_file);
1664         (void) unlink(temp_path);
1665
1666         return log_error_errno(r, "Failed to save network state to %s: %m", m->state_file);
1667 }
1668
1669 static int manager_dirty_handler(sd_event_source *s, void *userdata) {
1670         Manager *m = userdata;
1671         Link *link;
1672         Iterator i;
1673
1674         assert(m);
1675
1676         if (m->dirty)
1677                 manager_save(m);
1678
1679         SET_FOREACH(link, m->dirty_links, i)
1680                 if (link_save(link) >= 0)
1681                         link_clean(link);
1682
1683         return 1;
1684 }
1685
1686 static int signal_terminate_callback(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
1687         Manager *m = userdata;
1688
1689         assert(m);
1690         m->restarting = false;
1691
1692         log_debug("Terminate operation initiated.");
1693
1694         return sd_event_exit(sd_event_source_get_event(s), 0);
1695 }
1696
1697 static int signal_restart_callback(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
1698         Manager *m = userdata;
1699
1700         assert(m);
1701         m->restarting = true;
1702
1703         log_debug("Restart operation initiated.");
1704
1705         return sd_event_exit(sd_event_source_get_event(s), 0);
1706 }
1707
1708 int manager_new(Manager **ret) {
1709         _cleanup_(manager_freep) Manager *m = NULL;
1710         int r;
1711
1712         m = new(Manager, 1);
1713         if (!m)
1714                 return -ENOMEM;
1715
1716         *m = (Manager) {
1717                 .speed_meter_interval_usec = SPEED_METER_DEFAULT_TIME_INTERVAL,
1718         };
1719
1720         m->state_file = strdup("/run/systemd/netif/state");
1721         if (!m->state_file)
1722                 return -ENOMEM;
1723
1724         r = sd_event_default(&m->event);
1725         if (r < 0)
1726                 return r;
1727
1728         assert_se(sigprocmask_many(SIG_SETMASK, NULL, SIGINT, SIGTERM, SIGUSR2, -1) >= 0);
1729
1730         (void) sd_event_set_watchdog(m->event, true);
1731         (void) sd_event_add_signal(m->event, NULL, SIGTERM, signal_terminate_callback, m);
1732         (void) sd_event_add_signal(m->event, NULL, SIGINT, signal_terminate_callback, m);
1733         (void) sd_event_add_signal(m->event, NULL, SIGUSR2, signal_restart_callback, m);
1734
1735         r = sd_event_add_post(m->event, NULL, manager_dirty_handler, m);
1736         if (r < 0)
1737                 return r;
1738
1739         r = manager_connect_rtnl(m);
1740         if (r < 0)
1741                 return r;
1742
1743         r = manager_connect_genl(m);
1744         if (r < 0)
1745                 return r;
1746
1747         r = manager_connect_udev(m);
1748         if (r < 0)
1749                 return r;
1750
1751         r = sd_resolve_default(&m->resolve);
1752         if (r < 0)
1753                 return r;
1754
1755         r = sd_resolve_attach_event(m->resolve, m->event, 0);
1756         if (r < 0)
1757                 return r;
1758
1759         r = setup_default_address_pool(m);
1760         if (r < 0)
1761                 return r;
1762
1763         m->duid.type = DUID_TYPE_EN;
1764
1765         (void) routing_policy_load_rules(m->state_file, &m->rules_saved);
1766
1767         *ret = TAKE_PTR(m);
1768
1769         return 0;
1770 }
1771
1772 void manager_free(Manager *m) {
1773         struct in6_addr *a;
1774         AddressPool *pool;
1775         Link *link;
1776
1777         if (!m)
1778                 return;
1779
1780         free(m->state_file);
1781
1782         while ((a = hashmap_first_key(m->dhcp6_prefixes)))
1783                 (void) dhcp6_prefix_remove(m, a);
1784         m->dhcp6_prefixes = hashmap_free(m->dhcp6_prefixes);
1785
1786         while ((link = hashmap_steal_first(m->links))) {
1787                 if (link->dhcp6_client)
1788                         (void) dhcp6_lease_pd_prefix_lost(link->dhcp6_client, link);
1789
1790                 (void) link_stop_clients(link, true);
1791
1792                 link_unref(link);
1793         }
1794
1795         m->dirty_links = set_free_with_destructor(m->dirty_links, link_unref);
1796         m->links_requesting_uuid = set_free_with_destructor(m->links_requesting_uuid, link_unref);
1797         m->links = hashmap_free_with_destructor(m->links, link_unref);
1798
1799         m->duids_requesting_uuid = set_free(m->duids_requesting_uuid);
1800         m->networks = ordered_hashmap_free_with_destructor(m->networks, network_unref);
1801
1802         m->netdevs = hashmap_free_with_destructor(m->netdevs, netdev_unref);
1803
1804         while ((pool = m->address_pools))
1805                 address_pool_free(pool);
1806
1807         /* routing_policy_rule_free() access m->rules and m->rules_foreign.
1808          * So, it is necessary to set NULL after the sets are freed. */
1809         m->rules = set_free_with_destructor(m->rules, routing_policy_rule_free);
1810         m->rules_foreign = set_free_with_destructor(m->rules_foreign, routing_policy_rule_free);
1811         set_free_with_destructor(m->rules_saved, routing_policy_rule_free);
1812
1813         sd_netlink_unref(m->rtnl);
1814         sd_netlink_unref(m->genl);
1815         sd_resolve_unref(m->resolve);
1816
1817         sd_event_source_unref(m->speed_meter_event_source);
1818         sd_event_unref(m->event);
1819
1820         sd_device_monitor_unref(m->device_monitor);
1821
1822         bus_verify_polkit_async_registry_free(m->polkit_registry);
1823         sd_bus_flush_close_unref(m->bus);
1824
1825         free(m->dynamic_timezone);
1826         free(m->dynamic_hostname);
1827
1828         free(m);
1829 }
1830
1831 int manager_start(Manager *m) {
1832         Link *link;
1833         Iterator i;
1834         int r;
1835
1836         assert(m);
1837
1838         r = manager_start_speed_meter(m);
1839         if (r < 0)
1840                 return log_error_errno(r, "Failed to initialize speed meter: %m");
1841
1842         /* The dirty handler will deal with future serialization, but the first one
1843            must be done explicitly. */
1844
1845         manager_save(m);
1846
1847         HASHMAP_FOREACH(link, m->links, i)
1848                 link_save(link);
1849
1850         return 0;
1851 }
1852
1853 int manager_load_config(Manager *m) {
1854         int r;
1855
1856         /* update timestamp */
1857         paths_check_timestamp(NETWORK_DIRS, &m->network_dirs_ts_usec, true);
1858
1859         r = netdev_load(m);
1860         if (r < 0)
1861                 return r;
1862
1863         r = network_load(m);
1864         if (r < 0)
1865                 return r;
1866
1867         return 0;
1868 }
1869
1870 bool manager_should_reload(Manager *m) {
1871         return paths_check_timestamp(NETWORK_DIRS, &m->network_dirs_ts_usec, false);
1872 }
1873
1874 int manager_rtnl_enumerate_links(Manager *m) {
1875         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1876         sd_netlink_message *link;
1877         int r;
1878
1879         assert(m);
1880         assert(m->rtnl);
1881
1882         r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);
1883         if (r < 0)
1884                 return r;
1885
1886         r = sd_netlink_message_request_dump(req, true);
1887         if (r < 0)
1888                 return r;
1889
1890         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1891         if (r < 0)
1892                 return r;
1893
1894         for (link = reply; link; link = sd_netlink_message_next(link)) {
1895                 int k;
1896
1897                 m->enumerating = true;
1898
1899                 k = manager_rtnl_process_link(m->rtnl, link, m);
1900                 if (k < 0)
1901                         r = k;
1902
1903                 m->enumerating = false;
1904         }
1905
1906         return r;
1907 }
1908
1909 int manager_rtnl_enumerate_addresses(Manager *m) {
1910         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1911         sd_netlink_message *addr;
1912         int r;
1913
1914         assert(m);
1915         assert(m->rtnl);
1916
1917         r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, 0);
1918         if (r < 0)
1919                 return r;
1920
1921         r = sd_netlink_message_request_dump(req, true);
1922         if (r < 0)
1923                 return r;
1924
1925         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1926         if (r < 0)
1927                 return r;
1928
1929         for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
1930                 int k;
1931
1932                 m->enumerating = true;
1933
1934                 k = manager_rtnl_process_address(m->rtnl, addr, m);
1935                 if (k < 0)
1936                         r = k;
1937
1938                 m->enumerating = false;
1939         }
1940
1941         return r;
1942 }
1943
1944 int manager_rtnl_enumerate_neighbors(Manager *m) {
1945         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1946         sd_netlink_message *neigh;
1947         int r;
1948
1949         assert(m);
1950         assert(m->rtnl);
1951
1952         r = sd_rtnl_message_new_neigh(m->rtnl, &req, RTM_GETNEIGH, 0, AF_UNSPEC);
1953         if (r < 0)
1954                 return r;
1955
1956         r = sd_netlink_message_request_dump(req, true);
1957         if (r < 0)
1958                 return r;
1959
1960         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1961         if (r < 0)
1962                 return r;
1963
1964         for (neigh = reply; neigh; neigh = sd_netlink_message_next(neigh)) {
1965                 int k;
1966
1967                 m->enumerating = true;
1968
1969                 k = manager_rtnl_process_neighbor(m->rtnl, neigh, m);
1970                 if (k < 0)
1971                         r = k;
1972
1973                 m->enumerating = false;
1974         }
1975
1976         return r;
1977 }
1978
1979 int manager_rtnl_enumerate_routes(Manager *m) {
1980         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1981         sd_netlink_message *route;
1982         int r;
1983
1984         assert(m);
1985         assert(m->rtnl);
1986
1987         r = sd_rtnl_message_new_route(m->rtnl, &req, RTM_GETROUTE, 0, 0);
1988         if (r < 0)
1989                 return r;
1990
1991         r = sd_netlink_message_request_dump(req, true);
1992         if (r < 0)
1993                 return r;
1994
1995         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1996         if (r < 0)
1997                 return r;
1998
1999         for (route = reply; route; route = sd_netlink_message_next(route)) {
2000                 int k;
2001
2002                 m->enumerating = true;
2003
2004                 k = manager_rtnl_process_route(m->rtnl, route, m);
2005                 if (k < 0)
2006                         r = k;
2007
2008                 m->enumerating = false;
2009         }
2010
2011         return r;
2012 }
2013
2014 int manager_rtnl_enumerate_rules(Manager *m) {
2015         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2016         sd_netlink_message *rule;
2017         int r;
2018
2019         assert(m);
2020         assert(m->rtnl);
2021
2022         r = sd_rtnl_message_new_routing_policy_rule(m->rtnl, &req, RTM_GETRULE, 0);
2023         if (r < 0)
2024                 return r;
2025
2026         r = sd_netlink_message_request_dump(req, true);
2027         if (r < 0)
2028                 return r;
2029
2030         r = sd_netlink_call(m->rtnl, req, 0, &reply);
2031         if (r < 0) {
2032                 if (r == -EOPNOTSUPP) {
2033                         log_debug("FIB Rules are not supported by the kernel. Ignoring.");
2034                         return 0;
2035                 }
2036
2037                 return r;
2038         }
2039
2040         for (rule = reply; rule; rule = sd_netlink_message_next(rule)) {
2041                 int k;
2042
2043                 m->enumerating = true;
2044
2045                 k = manager_rtnl_process_rule(m->rtnl, rule, m);
2046                 if (k < 0)
2047                         r = k;
2048
2049                 m->enumerating = false;
2050         }
2051
2052         return r;
2053 }
2054
2055 int manager_rtnl_enumerate_nexthop(Manager *m) {
2056         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2057         sd_netlink_message *nexthop;
2058         int r;
2059
2060         assert(m);
2061         assert(m->rtnl);
2062
2063         r = sd_rtnl_message_new_nexthop(m->rtnl, &req, RTM_GETNEXTHOP, 0, 0);
2064         if (r < 0)
2065                 return r;
2066
2067         r = sd_netlink_message_request_dump(req, true);
2068         if (r < 0)
2069                 return r;
2070
2071         r = sd_netlink_call(m->rtnl, req, 0, &reply);
2072         if (r < 0) {
2073                 if (r == -EOPNOTSUPP) {
2074                         log_debug("Nexthop are not supported by the kernel. Ignoring.");
2075                         return 0;
2076                 }
2077
2078                 return r;
2079         }
2080
2081         for (nexthop = reply; nexthop; nexthop = sd_netlink_message_next(nexthop)) {
2082                 int k;
2083
2084                 m->enumerating = true;
2085
2086                 k = manager_rtnl_process_nexthop(m->rtnl, nexthop, m);
2087                 if (k < 0)
2088                         r = k;
2089
2090                 m->enumerating = false;
2091         }
2092
2093         return r;
2094 }
2095
2096 int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, union in_addr_union *found) {
2097         AddressPool *p;
2098         int r;
2099
2100         assert(m);
2101         assert(prefixlen > 0);
2102         assert(found);
2103
2104         LIST_FOREACH(address_pools, p, m->address_pools) {
2105                 if (p->family != family)
2106                         continue;
2107
2108                 r = address_pool_acquire(p, prefixlen, found);
2109                 if (r != 0)
2110                         return r;
2111         }
2112
2113         return 0;
2114 }
2115
2116 Link* manager_find_uplink(Manager *m, Link *exclude) {
2117         _cleanup_free_ struct local_address *gateways = NULL;
2118         int n, i;
2119
2120         assert(m);
2121
2122         /* Looks for a suitable "uplink", via black magic: an
2123          * interface that is up and where the default route with the
2124          * highest priority points to. */
2125
2126         n = local_gateways(m->rtnl, 0, AF_UNSPEC, &gateways);
2127         if (n < 0) {
2128                 log_warning_errno(n, "Failed to determine list of default gateways: %m");
2129                 return NULL;
2130         }
2131
2132         for (i = 0; i < n; i++) {
2133                 Link *link;
2134
2135                 link = hashmap_get(m->links, INT_TO_PTR(gateways[i].ifindex));
2136                 if (!link) {
2137                         log_debug("Weird, found a gateway for a link we don't know. Ignoring.");
2138                         continue;
2139                 }
2140
2141                 if (link == exclude)
2142                         continue;
2143
2144                 if (link->operstate < LINK_OPERSTATE_ROUTABLE)
2145                         continue;
2146
2147                 return link;
2148         }
2149
2150         return NULL;
2151 }
2152
2153 void manager_dirty(Manager *manager) {
2154         assert(manager);
2155
2156         /* the serialized state in /run is no longer up-to-date */
2157         manager->dirty = true;
2158 }
2159
2160 static int set_hostname_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2161         Manager *manager = userdata;
2162         const sd_bus_error *e;
2163
2164         assert(m);
2165         assert(manager);
2166
2167         e = sd_bus_message_get_error(m);
2168         if (e)
2169                 log_warning_errno(sd_bus_error_get_errno(e), "Could not set hostname: %s", e->message);
2170
2171         return 1;
2172 }
2173
2174 int manager_set_hostname(Manager *m, const char *hostname) {
2175         int r;
2176
2177         log_debug("Setting transient hostname: '%s'", strna(hostname));
2178
2179         if (free_and_strdup(&m->dynamic_hostname, hostname) < 0)
2180                 return log_oom();
2181
2182         if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
2183                 log_debug("Not connected to system bus, setting hostname later.");
2184                 return 0;
2185         }
2186
2187         r = sd_bus_call_method_async(
2188                         m->bus,
2189                         NULL,
2190                         "org.freedesktop.hostname1",
2191                         "/org/freedesktop/hostname1",
2192                         "org.freedesktop.hostname1",
2193                         "SetHostname",
2194                         set_hostname_handler,
2195                         m,
2196                         "sb",
2197                         hostname,
2198                         false);
2199
2200         if (r < 0)
2201                 return log_error_errno(r, "Could not set transient hostname: %m");
2202
2203         return 0;
2204 }
2205
2206 static int set_timezone_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2207         Manager *manager = userdata;
2208         const sd_bus_error *e;
2209
2210         assert(m);
2211         assert(manager);
2212
2213         e = sd_bus_message_get_error(m);
2214         if (e)
2215                 log_warning_errno(sd_bus_error_get_errno(e), "Could not set timezone: %s", e->message);
2216
2217         return 1;
2218 }
2219
2220 int manager_set_timezone(Manager *m, const char *tz) {
2221         int r;
2222
2223         assert(m);
2224         assert(tz);
2225
2226         log_debug("Setting system timezone: '%s'", tz);
2227         if (free_and_strdup(&m->dynamic_timezone, tz) < 0)
2228                 return log_oom();
2229
2230         if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
2231                 log_debug("Not connected to system bus, setting timezone later.");
2232                 return 0;
2233         }
2234
2235         r = sd_bus_call_method_async(
2236                         m->bus,
2237                         NULL,
2238                         "org.freedesktop.timedate1",
2239                         "/org/freedesktop/timedate1",
2240                         "org.freedesktop.timedate1",
2241                         "SetTimezone",
2242                         set_timezone_handler,
2243                         m,
2244                         "sb",
2245                         tz,
2246                         false);
2247         if (r < 0)
2248                 return log_error_errno(r, "Could not set timezone: %m");
2249
2250         return 0;
2251 }
2252
2253 int manager_request_product_uuid(Manager *m, Link *link) {
2254         int r;
2255
2256         assert(m);
2257
2258         if (m->has_product_uuid)
2259                 return 0;
2260
2261         log_debug("Requesting product UUID");
2262
2263         if (link) {
2264                 DUID *duid;
2265
2266                 assert_se(duid = link_get_duid(link));
2267
2268                 r = set_ensure_allocated(&m->links_requesting_uuid, NULL);
2269                 if (r < 0)
2270                         return log_oom();
2271
2272                 r = set_ensure_allocated(&m->duids_requesting_uuid, NULL);
2273                 if (r < 0)
2274                         return log_oom();
2275
2276                 r = set_put(m->links_requesting_uuid, link);
2277                 if (r < 0)
2278                         return log_oom();
2279
2280                 r = set_put(m->duids_requesting_uuid, duid);
2281                 if (r < 0)
2282                         return log_oom();
2283
2284                 link_ref(link);
2285         }
2286
2287         if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
2288                 log_debug("Not connected to system bus, requesting product UUID later.");
2289                 return 0;
2290         }
2291
2292         r = sd_bus_call_method_async(
2293                         m->bus,
2294                         NULL,
2295                         "org.freedesktop.hostname1",
2296                         "/org/freedesktop/hostname1",
2297                         "org.freedesktop.hostname1",
2298                         "GetProductUUID",
2299                         get_product_uuid_handler,
2300                         m,
2301                         "b",
2302                         false);
2303         if (r < 0)
2304                 return log_warning_errno(r, "Failed to get product UUID: %m");
2305
2306         return 0;
2307 }