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