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 log_message_warning_errno(sd_netlink_message *m, int err, const char *msg) {
  45         const char *err_msg = NULL;
  46
  47         (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
  48         return log_warning_errno(err, "%s: %s%s%m", msg, strempty(err_msg), err_msg ? " " : "");
  49 }
  50
  51 static int setup_default_address_pool(Manager *m) {
  52         AddressPool *p;
  53         int r;
  54
  55         assert(m);
  56
  57         /* Add in the well-known private address ranges. */
  58
  59         r = address_pool_new_from_string(m, &p, AF_INET6, "fd00::", 8);
  60         if (r < 0)
  61                 return r;
  62
  63         r = address_pool_new_from_string(m, &p, AF_INET, "10.0.0.0", 8);
  64         if (r < 0)
  65                 return r;
  66
  67         r = address_pool_new_from_string(m, &p, AF_INET, "172.16.0.0", 12);
  68         if (r < 0)
  69                 return r;
  70
  71         r = address_pool_new_from_string(m, &p, AF_INET, "192.168.0.0", 16);
  72         if (r < 0)
  73                 return r;
  74
  75         return 0;
  76 }
  77
  78 static int manager_reset_all(Manager *m) {
  79         Link *link;
  80         Iterator i;
  81         int r;
  82
  83         assert(m);
  84
  85         HASHMAP_FOREACH(link, m->links, i) {
  86                 r = link_carrier_reset(link);
  87                 if (r < 0)
  88                         log_link_warning_errno(link, r, "Could not reset carrier: %m");
  89         }
  90
  91         return 0;
  92 }
  93
  94 static int match_prepare_for_sleep(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
  95         Manager *m = userdata;
  96         int b, r;
  97
  98         assert(message);
  99         assert(m);
 100
 101         r = sd_bus_message_read(message, "b", &b);
 102         if (r < 0) {
 103                 log_debug_errno(r, "Failed to parse PrepareForSleep signal: %m");
 104                 return 0;
 105         }
 106
 107         if (b)
 108                 return 0;
 109
 110         log_debug("Coming back from suspend, resetting all connections...");
 111
 112         (void) manager_reset_all(m);
 113
 114         return 0;
 115 }
 116
 117 static int on_connected(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
 118         Manager *m = userdata;
 119
 120         assert(message);
 121         assert(m);
 122
 123         /* Did we get a timezone or transient hostname from DHCP while D-Bus wasn't up yet? */
 124         if (m->dynamic_hostname)
 125                 (void) manager_set_hostname(m, m->dynamic_hostname);
 126         if (m->dynamic_timezone)
 127                 (void) manager_set_timezone(m, m->dynamic_timezone);
 128         if (m->links_requesting_uuid)
 129                 (void) manager_request_product_uuid(m, NULL);
 130
 131         return 0;
 132 }
 133
 134 int manager_connect_bus(Manager *m) {
 135         int r;
 136
 137         assert(m);
 138
 139         if (m->bus)
 140                 return 0;
 141
 142         r = bus_open_system_watch_bind_with_description(&m->bus, "bus-api-network");
 143         if (r < 0)
 144                 return log_error_errno(r, "Failed to connect to bus: %m");
 145
 146         r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/network1", "org.freedesktop.network1.Manager", manager_vtable, m);
 147         if (r < 0)
 148                 return log_error_errno(r, "Failed to add manager object vtable: %m");
 149
 150         r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/link", "org.freedesktop.network1.Link", link_vtable, link_object_find, m);
 151         if (r < 0)
 152                return log_error_errno(r, "Failed to add link object vtable: %m");
 153
 154         r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/link", link_node_enumerator, m);
 155         if (r < 0)
 156                 return log_error_errno(r, "Failed to add link enumerator: %m");
 157
 158         r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/network", "org.freedesktop.network1.Network", network_vtable, network_object_find, m);
 159         if (r < 0)
 160                return log_error_errno(r, "Failed to add network object vtable: %m");
 161
 162         r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/network", network_node_enumerator, m);
 163         if (r < 0)
 164                 return log_error_errno(r, "Failed to add network enumerator: %m");
 165
 166         r = sd_bus_request_name_async(m->bus, NULL, "org.freedesktop.network1", 0, NULL, NULL);
 167         if (r < 0)
 168                 return log_error_errno(r, "Failed to request name: %m");
 169
 170         r = sd_bus_attach_event(m->bus, m->event, 0);
 171         if (r < 0)
 172                 return log_error_errno(r, "Failed to attach bus to event loop: %m");
 173
 174         r = sd_bus_match_signal_async(
 175                         m->bus,
 176                         NULL,
 177                         "org.freedesktop.DBus.Local",
 178                         NULL,
 179                         "org.freedesktop.DBus.Local",
 180                         "Connected",
 181                         on_connected, NULL, m);
 182         if (r < 0)
 183                 return log_error_errno(r, "Failed to request match on Connected signal: %m");
 184
 185         r = sd_bus_match_signal_async(
 186                         m->bus,
 187                         NULL,
 188                         "org.freedesktop.login1",
 189                         "/org/freedesktop/login1",
 190                         "org.freedesktop.login1.Manager",
 191                         "PrepareForSleep",
 192                         match_prepare_for_sleep, NULL, m);
 193         if (r < 0)
 194                 log_warning_errno(r, "Failed to request match for PrepareForSleep, ignoring: %m");
 195
 196         return 0;
 197 }
 198
 199 static int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) {
 200         Manager *m = userdata;
 201         DeviceAction action;
 202         Link *link = NULL;
 203         int r, ifindex;
 204
 205         assert(m);
 206         assert(device);
 207
 208         r = device_get_action(device, &action);
 209         if (r < 0) {
 210                 log_device_debug_errno(device, r, "Failed to get udev action, ignoring device: %m");
 211                 return 0;
 212         }
 213
 214         if (!IN_SET(action, DEVICE_ACTION_ADD, DEVICE_ACTION_CHANGE, DEVICE_ACTION_MOVE)) {
 215                 log_device_debug(device, "Ignoring udev %s event for device.", device_action_to_string(action));
 216                 return 0;
 217         }
 218
 219         r = sd_device_get_ifindex(device, &ifindex);
 220         if (r < 0) {
 221                 log_device_debug_errno(device, r, "Ignoring udev ADD event for device without ifindex or with invalid ifindex: %m");
 222                 return 0;
 223         }
 224
 225         r = device_is_renaming(device);
 226         if (r < 0) {
 227                 log_device_error_errno(device, r, "Failed to determine the device is renamed or not, ignoring '%s' uevent: %m",
 228                                        device_action_to_string(action));
 229                 return 0;
 230         }
 231         if (r > 0) {
 232                 log_device_debug(device, "Interface is under renaming, wait for the interface to be renamed: %m");
 233                 return 0;
 234         }
 235
 236         r = link_get(m, ifindex, &link);
 237         if (r < 0) {
 238                 if (r != -ENODEV)
 239                         log_debug_errno(r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
 240                 return 0;
 241         }
 242
 243         (void) link_initialized(link, device);
 244
 245         return 0;
 246 }
 247
 248 static int manager_connect_udev(Manager *m) {
 249         int r;
 250
 251         /* udev does not initialize devices inside containers,
 252          * so we rely on them being already initialized before
 253          * entering the container */
 254         if (detect_container() > 0)
 255                 return 0;
 256
 257         r = sd_device_monitor_new(&m->device_monitor);
 258         if (r < 0)
 259                 return log_error_errno(r, "Failed to initialize device monitor: %m");
 260
 261         r = sd_device_monitor_filter_add_match_subsystem_devtype(m->device_monitor, "net", NULL);
 262         if (r < 0)
 263                 return log_error_errno(r, "Could not add device monitor filter: %m");
 264
 265         r = sd_device_monitor_attach_event(m->device_monitor, m->event);
 266         if (r < 0)
 267                 return log_error_errno(r, "Failed to attach event to device monitor: %m");
 268
 269         r = sd_device_monitor_start(m->device_monitor, manager_udev_process_link, m);
 270         if (r < 0)
 271                 return log_error_errno(r, "Failed to start device monitor: %m");
 272
 273         return 0;
 274 }
 275
 276 int manager_rtnl_process_route(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 277         _cleanup_(route_freep) Route *tmp = NULL;
 278         Route *route = NULL;
 279         Manager *m = userdata;
 280         Link *link = NULL;
 281         uint32_t ifindex;
 282         uint16_t type;
 283         unsigned char table;
 284         int r;
 285
 286         assert(rtnl);
 287         assert(message);
 288         assert(m);
 289
 290         if (sd_netlink_message_is_error(message)) {
 291                 r = sd_netlink_message_get_errno(message);
 292                 if (r < 0)
 293                         log_message_warning_errno(message, r, "rtnl: failed to receive route message, ignoring");
 294
 295                 return 0;
 296         }
 297
 298         r = sd_netlink_message_get_type(message, &type);
 299         if (r < 0) {
 300                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
 301                 return 0;
 302         } else if (!IN_SET(type, RTM_NEWROUTE, RTM_DELROUTE)) {
 303                 log_warning("rtnl: received unexpected message type %u when processing route, ignoring.", type);
 304                 return 0;
 305         }
 306
 307         r = sd_netlink_message_read_u32(message, RTA_OIF, &ifindex);
 308         if (r == -ENODATA) {
 309                 log_debug("rtnl: received route message without ifindex, ignoring");
 310                 return 0;
 311         } else if (r < 0) {
 312                 log_warning_errno(r, "rtnl: could not get ifindex from route message, ignoring: %m");
 313                 return 0;
 314         } else if (ifindex <= 0) {
 315                 log_warning("rtnl: received route message with invalid ifindex %d, ignoring.", ifindex);
 316                 return 0;
 317         }
 318
 319         r = link_get(m, ifindex, &link);
 320         if (r < 0 || !link) {
 321                 /* when enumerating we might be out of sync, but we will
 322                  * get the route again, so just ignore it */
 323                 if (!m->enumerating)
 324                         log_warning("rtnl: received route message for link (%d) we do not know about, ignoring", ifindex);
 325                 return 0;
 326         }
 327
 328         r = route_new(&tmp);
 329         if (r < 0)
 330                 return log_oom();
 331
 332         r = sd_rtnl_message_route_get_family(message, &tmp->family);
 333         if (r < 0 || !IN_SET(tmp->family, AF_INET, AF_INET6)) {
 334                 log_link_warning(link, "rtnl: received route message with invalid family, ignoring");
 335                 return 0;
 336         }
 337
 338         r = sd_rtnl_message_route_get_protocol(message, &tmp->protocol);
 339         if (r < 0) {
 340                 log_warning_errno(r, "rtnl: received route message with invalid route protocol: %m");
 341                 return 0;
 342         }
 343
 344         switch (tmp->family) {
 345         case AF_INET:
 346                 r = sd_netlink_message_read_in_addr(message, RTA_DST, &tmp->dst.in);
 347                 if (r < 0 && r != -ENODATA) {
 348                         log_link_warning_errno(link, r, "rtnl: received route message without valid destination, ignoring: %m");
 349                         return 0;
 350                 }
 351
 352                 r = sd_netlink_message_read_in_addr(message, RTA_GATEWAY, &tmp->gw.in);
 353                 if (r < 0 && r != -ENODATA) {
 354                         log_link_warning_errno(link, r, "rtnl: received route message without valid gateway, ignoring: %m");
 355                         return 0;
 356                 }
 357
 358                 r = sd_netlink_message_read_in_addr(message, RTA_SRC, &tmp->src.in);
 359                 if (r < 0 && r != -ENODATA) {
 360                         log_link_warning_errno(link, r, "rtnl: received route message without valid source, ignoring: %m");
 361                         return 0;
 362                 }
 363
 364                 r = sd_netlink_message_read_in_addr(message, RTA_PREFSRC, &tmp->prefsrc.in);
 365                 if (r < 0 && r != -ENODATA) {
 366                         log_link_warning_errno(link, r, "rtnl: received route message without valid preferred source, ignoring: %m");
 367                         return 0;
 368                 }
 369
 370                 break;
 371
 372         case AF_INET6:
 373                 r = sd_netlink_message_read_in6_addr(message, RTA_DST, &tmp->dst.in6);
 374                 if (r < 0 && r != -ENODATA) {
 375                         log_link_warning_errno(link, r, "rtnl: received route message without valid destination, ignoring: %m");
 376                         return 0;
 377                 }
 378
 379                 r = sd_netlink_message_read_in6_addr(message, RTA_GATEWAY, &tmp->gw.in6);
 380                 if (r < 0 && r != -ENODATA) {
 381                         log_link_warning_errno(link, r, "rtnl: received route message without valid gateway, ignoring: %m");
 382                         return 0;
 383                 }
 384
 385                 r = sd_netlink_message_read_in6_addr(message, RTA_SRC, &tmp->src.in6);
 386                 if (r < 0 && r != -ENODATA) {
 387                         log_link_warning_errno(link, r, "rtnl: received route message without valid source, ignoring: %m");
 388                         return 0;
 389                 }
 390
 391                 r = sd_netlink_message_read_in6_addr(message, RTA_PREFSRC, &tmp->prefsrc.in6);
 392                 if (r < 0 && r != -ENODATA) {
 393                         log_link_warning_errno(link, r, "rtnl: received route message without valid preferred source, ignoring: %m");
 394                         return 0;
 395                 }
 396
 397                 break;
 398
 399         default:
 400                 assert_not_reached("Received route message with unsupported address family");
 401                 return 0;
 402         }
 403
 404         r = sd_rtnl_message_route_get_dst_prefixlen(message, &tmp->dst_prefixlen);
 405         if (r < 0) {
 406                 log_link_warning_errno(link, r, "rtnl: received route message with invalid destination prefixlen, ignoring: %m");
 407                 return 0;
 408         }
 409
 410         r = sd_rtnl_message_route_get_src_prefixlen(message, &tmp->src_prefixlen);
 411         if (r < 0) {
 412                 log_link_warning_errno(link, r, "rtnl: received route message with invalid source prefixlen, ignoring: %m");
 413                 return 0;
 414         }
 415
 416         r = sd_rtnl_message_route_get_scope(message, &tmp->scope);
 417         if (r < 0) {
 418                 log_link_warning_errno(link, r, "rtnl: received route message with invalid scope, ignoring: %m");
 419                 return 0;
 420         }
 421
 422         r = sd_rtnl_message_route_get_tos(message, &tmp->tos);
 423         if (r < 0) {
 424                 log_link_warning_errno(link, r, "rtnl: received route message with invalid tos, ignoring: %m");
 425                 return 0;
 426         }
 427
 428         r = sd_rtnl_message_route_get_type(message, &tmp->type);
 429         if (r < 0) {
 430                 log_link_warning_errno(link, r, "rtnl: received route message with invalid type, ignoring: %m");
 431                 return 0;
 432         }
 433
 434         r = sd_rtnl_message_route_get_table(message, &table);
 435         if (r < 0) {
 436                 log_link_warning_errno(link, r, "rtnl: received route message with invalid table, ignoring: %m");
 437                 return 0;
 438         }
 439         tmp->table = table;
 440
 441         r = sd_netlink_message_read_u32(message, RTA_PRIORITY, &tmp->priority);
 442         if (r < 0 && r != -ENODATA) {
 443                 log_link_warning_errno(link, r, "rtnl: received route message with invalid priority, ignoring: %m");
 444                 return 0;
 445         }
 446
 447         r = sd_netlink_message_enter_container(message, RTA_METRICS);
 448         if (r < 0 && r != -ENODATA) {
 449                 log_link_error_errno(link, r, "rtnl: Could not enter RTA_METRICS container: %m");
 450                 return 0;
 451         }
 452         if (r >= 0) {
 453                 r = sd_netlink_message_read_u32(message, RTAX_INITCWND, &tmp->initcwnd);
 454                 if (r < 0 && r != -ENODATA) {
 455                         log_link_warning_errno(link, r, "rtnl: received route message with invalid initcwnd, ignoring: %m");
 456                         return 0;
 457                 }
 458
 459                 r = sd_netlink_message_read_u32(message, RTAX_INITRWND, &tmp->initrwnd);
 460                 if (r < 0 && r != -ENODATA) {
 461                         log_link_warning_errno(link, r, "rtnl: received route message with invalid initrwnd, ignoring: %m");
 462                         return 0;
 463                 }
 464
 465                 r = sd_netlink_message_exit_container(message);
 466                 if (r < 0) {
 467                         log_link_error_errno(link, r, "rtnl: Could not exit from RTA_METRICS container: %m");
 468                         return 0;
 469                 }
 470         }
 471
 472         (void) route_get(link, tmp, &route);
 473
 474         if (DEBUG_LOGGING) {
 475                 _cleanup_free_ char *buf_dst = NULL, *buf_dst_prefixlen = NULL,
 476                         *buf_src = NULL, *buf_gw = NULL, *buf_prefsrc = NULL;
 477                 char buf_scope[ROUTE_SCOPE_STR_MAX], buf_table[ROUTE_TABLE_STR_MAX],
 478                         buf_protocol[ROUTE_PROTOCOL_STR_MAX];
 479
 480                 if (!in_addr_is_null(tmp->family, &tmp->dst)) {
 481                         (void) in_addr_to_string(tmp->family, &tmp->dst, &buf_dst);
 482                         (void) asprintf(&buf_dst_prefixlen, "/%u", tmp->dst_prefixlen);
 483                 }
 484                 if (!in_addr_is_null(tmp->family, &tmp->src))
 485                         (void) in_addr_to_string(tmp->family, &tmp->src, &buf_src);
 486                 if (!in_addr_is_null(tmp->family, &tmp->gw))
 487                         (void) in_addr_to_string(tmp->family, &tmp->gw, &buf_gw);
 488                 if (!in_addr_is_null(tmp->family, &tmp->prefsrc))
 489                         (void) in_addr_to_string(tmp->family, &tmp->prefsrc, &buf_prefsrc);
 490
 491                 log_link_debug(link,
 492                                "%s route: dst: %s%s, src: %s, gw: %s, prefsrc: %s, scope: %s, table: %s, proto: %s, type: %s",
 493                                type == RTM_DELROUTE ? "Forgetting" : route ? "Received remembered" : "Remembering",
 494                                strna(buf_dst), strempty(buf_dst_prefixlen),
 495                                strna(buf_src), strna(buf_gw), strna(buf_prefsrc),
 496                                format_route_scope(tmp->scope, buf_scope, sizeof buf_scope),
 497                                format_route_table(tmp->table, buf_table, sizeof buf_table),
 498                                format_route_protocol(tmp->protocol, buf_protocol, sizeof buf_protocol),
 499                                strna(route_type_to_string(tmp->type)));
 500         }
 501
 502         switch (type) {
 503         case RTM_NEWROUTE:
 504                 if (!route) {
 505                         /* A route appeared that we did not request */
 506                         r = route_add_foreign(link, tmp, &route);
 507                         if (r < 0) {
 508                                 log_link_warning_errno(link, r, "Failed to remember foreign route, ignoring: %m");
 509                                 return 0;
 510                         }
 511                 }
 512
 513                 break;
 514
 515         case RTM_DELROUTE:
 516                 route_free(route);
 517                 break;
 518
 519         default:
 520                 assert_not_reached("Received route message with invalid RTNL message type");
 521         }
 522
 523         return 1;
 524 }
 525
 526 static int manager_rtnl_process_neighbor_lladdr(sd_netlink_message *message, union lladdr_union *lladdr, size_t *size, char **str) {
 527         int r;
 528
 529         assert(message);
 530         assert(lladdr);
 531         assert(size);
 532         assert(str);
 533
 534         *str = NULL;
 535
 536         r = sd_netlink_message_read(message, NDA_LLADDR, sizeof(lladdr->ip.in6), &lladdr->ip.in6);
 537         if (r >= 0) {
 538                 *size = sizeof(lladdr->ip.in6);
 539                 if (in_addr_to_string(AF_INET6, &lladdr->ip, str) < 0)
 540                         log_warning_errno(r, "Could not print lower address: %m");
 541                 return r;
 542         }
 543
 544         r = sd_netlink_message_read(message, NDA_LLADDR, sizeof(lladdr->mac), &lladdr->mac);
 545         if (r >= 0) {
 546                 *size = sizeof(lladdr->mac);
 547                 *str = new(char, ETHER_ADDR_TO_STRING_MAX);
 548                 if (!*str) {
 549                         log_oom();
 550                         return r;
 551                 }
 552                 ether_addr_to_string(&lladdr->mac, *str);
 553                 return r;
 554         }
 555
 556         r = sd_netlink_message_read(message, NDA_LLADDR, sizeof(lladdr->ip.in), &lladdr->ip.in);
 557         if (r >= 0) {
 558                 *size = sizeof(lladdr->ip.in);
 559                 if (in_addr_to_string(AF_INET, &lladdr->ip, str) < 0)
 560                         log_warning_errno(r, "Could not print lower address: %m");
 561                 return r;
 562         }
 563
 564         return r;
 565 }
 566
 567 int manager_rtnl_process_neighbor(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 568         Manager *m = userdata;
 569         Link *link = NULL;
 570         Neighbor *neighbor = NULL;
 571         int ifindex, family, r;
 572         uint16_t type, state;
 573         union in_addr_union in_addr = IN_ADDR_NULL;
 574         _cleanup_free_ char *addr_str = NULL;
 575         union lladdr_union lladdr;
 576         size_t lladdr_size = 0;
 577         _cleanup_free_ char *lladdr_str = NULL;
 578
 579         assert(rtnl);
 580         assert(message);
 581         assert(m);
 582
 583         if (sd_netlink_message_is_error(message)) {
 584                 r = sd_netlink_message_get_errno(message);
 585                 if (r < 0)
 586                         log_message_warning_errno(message, r, "rtnl: failed to receive neighbor message, ignoring");
 587
 588                 return 0;
 589         }
 590
 591         r = sd_netlink_message_get_type(message, &type);
 592         if (r < 0) {
 593                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
 594                 return 0;
 595         } else if (!IN_SET(type, RTM_NEWNEIGH, RTM_DELNEIGH)) {
 596                 log_warning("rtnl: received unexpected message type %u when processing neighbor, ignoring.", type);
 597                 return 0;
 598         }
 599
 600         r = sd_rtnl_message_neigh_get_state(message, &state);
 601         if (r < 0) {
 602                 log_link_warning_errno(link, r, "rtnl: received neighbor message with invalid state, ignoring: %m");
 603                 return 0;
 604         } else if (!FLAGS_SET(state, NUD_PERMANENT)) {
 605                 log_debug("rtnl: received non-static neighbor, ignoring.");
 606                 return 0;
 607         }
 608
 609         r = sd_rtnl_message_neigh_get_ifindex(message, &ifindex);
 610         if (r < 0) {
 611                 log_warning_errno(r, "rtnl: could not get ifindex from message, ignoring: %m");
 612                 return 0;
 613         } else if (ifindex <= 0) {
 614                 log_warning("rtnl: received neighbor message with invalid ifindex %d, ignoring.", ifindex);
 615                 return 0;
 616         }
 617
 618         r = link_get(m, ifindex, &link);
 619         if (r < 0 || !link) {
 620                 /* when enumerating we might be out of sync, but we will get the neighbor again, so just
 621                  * ignore it */
 622                 if (!m->enumerating)
 623                         log_warning("rtnl: received neighbor for link '%d' we don't know about, ignoring.", ifindex);
 624                 return 0;
 625         }
 626
 627         r = sd_rtnl_message_neigh_get_family(message, &family);
 628         if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) {
 629                 log_link_warning(link, "rtnl: received neighbor message with invalid family, ignoring.");
 630                 return 0;
 631         }
 632
 633         switch (family) {
 634         case AF_INET:
 635                 r = sd_netlink_message_read_in_addr(message, NDA_DST, &in_addr.in);
 636                 if (r < 0) {
 637                         log_link_warning_errno(link, r, "rtnl: received neighbor message without valid address, ignoring: %m");
 638                         return 0;
 639                 }
 640
 641                 break;
 642
 643         case AF_INET6:
 644                 r = sd_netlink_message_read_in6_addr(message, NDA_DST, &in_addr.in6);
 645                 if (r < 0) {
 646                         log_link_warning_errno(link, r, "rtnl: received neighbor message without valid address, ignoring: %m");
 647                         return 0;
 648                 }
 649
 650                 break;
 651
 652         default:
 653                 assert_not_reached("Received unsupported address family");
 654         }
 655
 656         if (in_addr_to_string(family, &in_addr, &addr_str) < 0)
 657                 log_link_warning_errno(link, r, "Could not print address: %m");
 658
 659         r = manager_rtnl_process_neighbor_lladdr(message, &lladdr, &lladdr_size, &lladdr_str);
 660         if (r < 0) {
 661                 log_link_warning_errno(link, r, "rtnl: received neighbor message with invalid lladdr, ignoring: %m");
 662                 return 0;
 663         }
 664
 665         (void) neighbor_get(link, family, &in_addr, &lladdr, lladdr_size, &neighbor);
 666
 667         switch (type) {
 668         case RTM_NEWNEIGH:
 669                 if (neighbor)
 670                         log_link_debug(link, "Remembering neighbor: %s->%s",
 671                                        strnull(addr_str), strnull(lladdr_str));
 672                 else {
 673                         /* A neighbor appeared that we did not request */
 674                         r = neighbor_add_foreign(link, family, &in_addr, &lladdr, lladdr_size, &neighbor);
 675                         if (r < 0) {
 676                                 log_link_warning_errno(link, r, "Failed to remember foreign neighbor %s->%s, ignoring: %m",
 677                                                        strnull(addr_str), strnull(lladdr_str));
 678                                 return 0;
 679                         } else
 680                                 log_link_debug(link, "Remembering foreign neighbor: %s->%s",
 681                                                strnull(addr_str), strnull(lladdr_str));
 682                 }
 683
 684                 break;
 685
 686         case RTM_DELNEIGH:
 687                 if (neighbor) {
 688                         log_link_debug(link, "Forgetting neighbor: %s->%s",
 689                                        strnull(addr_str), strnull(lladdr_str));
 690                         (void) neighbor_free(neighbor);
 691                 } else
 692                         log_link_info(link, "Kernel removed a neighbor we don't remember: %s->%s, ignoring.",
 693                                       strnull(addr_str), strnull(lladdr_str));
 694
 695                 break;
 696
 697         default:
 698                 assert_not_reached("Received invalid RTNL message type");
 699         }
 700
 701         return 1;
 702 }
 703
 704 int manager_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 705         _cleanup_free_ char *buf = NULL;
 706         Manager *m = userdata;
 707         Link *link = NULL;
 708         uint16_t type;
 709         unsigned char flags, prefixlen, scope;
 710         union in_addr_union in_addr = IN_ADDR_NULL;
 711         struct ifa_cacheinfo cinfo;
 712         Address *address = NULL;
 713         char valid_buf[FORMAT_TIMESPAN_MAX];
 714         const char *valid_str = NULL;
 715         int ifindex, family, r;
 716
 717         assert(rtnl);
 718         assert(message);
 719         assert(m);
 720
 721         if (sd_netlink_message_is_error(message)) {
 722                 r = sd_netlink_message_get_errno(message);
 723                 if (r < 0)
 724                         log_message_warning_errno(message, r, "rtnl: failed to receive address message, ignoring");
 725
 726                 return 0;
 727         }
 728
 729         r = sd_netlink_message_get_type(message, &type);
 730         if (r < 0) {
 731                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
 732                 return 0;
 733         } else if (!IN_SET(type, RTM_NEWADDR, RTM_DELADDR)) {
 734                 log_warning("rtnl: received unexpected message type %u when processing address, ignoring.", type);
 735                 return 0;
 736         }
 737
 738         r = sd_rtnl_message_addr_get_ifindex(message, &ifindex);
 739         if (r < 0) {
 740                 log_warning_errno(r, "rtnl: could not get ifindex from message, ignoring: %m");
 741                 return 0;
 742         } else if (ifindex <= 0) {
 743                 log_warning("rtnl: received address message with invalid ifindex %d, ignoring.", ifindex);
 744                 return 0;
 745         }
 746
 747         r = link_get(m, ifindex, &link);
 748         if (r < 0 || !link) {
 749                 /* when enumerating we might be out of sync, but we will get the address again, so just
 750                  * ignore it */
 751                 if (!m->enumerating)
 752                         log_warning("rtnl: received address for link '%d' we don't know about, ignoring.", ifindex);
 753                 return 0;
 754         }
 755
 756         r = sd_rtnl_message_addr_get_family(message, &family);
 757         if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) {
 758                 log_link_warning(link, "rtnl: received address message with invalid family, ignoring.");
 759                 return 0;
 760         }
 761
 762         r = sd_rtnl_message_addr_get_prefixlen(message, &prefixlen);
 763         if (r < 0) {
 764                 log_link_warning_errno(link, r, "rtnl: received address message with invalid prefixlen, ignoring: %m");
 765                 return 0;
 766         }
 767
 768         r = sd_rtnl_message_addr_get_scope(message, &scope);
 769         if (r < 0) {
 770                 log_link_warning_errno(link, r, "rtnl: received address message with invalid scope, ignoring: %m");
 771                 return 0;
 772         }
 773
 774         r = sd_rtnl_message_addr_get_flags(message, &flags);
 775         if (r < 0) {
 776                 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
 777                 return 0;
 778         }
 779
 780         switch (family) {
 781         case AF_INET:
 782                 r = sd_netlink_message_read_in_addr(message, IFA_LOCAL, &in_addr.in);
 783                 if (r < 0) {
 784                         log_link_warning_errno(link, r, "rtnl: received address message without valid address, ignoring: %m");
 785                         return 0;
 786                 }
 787
 788                 break;
 789
 790         case AF_INET6:
 791                 r = sd_netlink_message_read_in6_addr(message, IFA_ADDRESS, &in_addr.in6);
 792                 if (r < 0) {
 793                         log_link_warning_errno(link, r, "rtnl: received address message without valid address, ignoring: %m");
 794                         return 0;
 795                 }
 796
 797                 break;
 798
 799         default:
 800                 assert_not_reached("Received unsupported address family");
 801         }
 802
 803         r = in_addr_to_string(family, &in_addr, &buf);
 804         if (r < 0)
 805                 log_link_warning_errno(link, r, "Could not print address: %m");
 806
 807         r = sd_netlink_message_read_cache_info(message, IFA_CACHEINFO, &cinfo);
 808         if (r < 0 && r != -ENODATA) {
 809                 log_link_warning_errno(link, r, "rtnl: cannot get IFA_CACHEINFO attribute, ignoring: %m");
 810                 return 0;
 811         } else if (r >= 0 && cinfo.ifa_valid != CACHE_INFO_INFINITY_LIFE_TIME)
 812                 valid_str = format_timespan(valid_buf, FORMAT_TIMESPAN_MAX,
 813                                             cinfo.ifa_valid * USEC_PER_SEC,
 814                                             USEC_PER_SEC);
 815
 816         (void) address_get(link, family, &in_addr, prefixlen, &address);
 817
 818         switch (type) {
 819         case RTM_NEWADDR:
 820                 if (address)
 821                         log_link_debug(link, "Remembering updated address: %s/%u (valid %s%s)",
 822                                        strnull(buf), prefixlen,
 823                                        valid_str ? "for " : "forever", strempty(valid_str));
 824                 else {
 825                         /* An address appeared that we did not request */
 826                         r = address_add_foreign(link, family, &in_addr, prefixlen, &address);
 827                         if (r < 0) {
 828                                 log_link_warning_errno(link, r, "Failed to remember foreign address %s/%u, ignoring: %m",
 829                                                        strnull(buf), prefixlen);
 830                                 return 0;
 831                         } else
 832                                 log_link_debug(link, "Remembering foreign address: %s/%u (valid %s%s)",
 833                                                strnull(buf), prefixlen,
 834                                                valid_str ? "for " : "forever", strempty(valid_str));
 835                 }
 836
 837                 /* address_update() logs internally, so we don't need to. */
 838                 (void) address_update(address, flags, scope, &cinfo);
 839
 840                 break;
 841
 842         case RTM_DELADDR:
 843                 if (address) {
 844                         log_link_debug(link, "Forgetting address: %s/%u (valid %s%s)",
 845                                        strnull(buf), prefixlen,
 846                                        valid_str ? "for " : "forever", strempty(valid_str));
 847                         (void) address_drop(address);
 848                 } else
 849                         log_link_info(link, "Kernel removed an address we don't remember: %s/%u (valid %s%s), ignoring.",
 850                                       strnull(buf), prefixlen,
 851                                       valid_str ? "for " : "forever", strempty(valid_str));
 852
 853                 break;
 854
 855         default:
 856                 assert_not_reached("Received invalid RTNL message type");
 857         }
 858
 859         return 1;
 860 }
 861
 862 static int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 863         Manager *m = userdata;
 864         Link *link = NULL;
 865         NetDev *netdev = NULL;
 866         uint16_t type;
 867         const char *name;
 868         int r, ifindex;
 869
 870         assert(rtnl);
 871         assert(message);
 872         assert(m);
 873
 874         if (sd_netlink_message_is_error(message)) {
 875                 r = sd_netlink_message_get_errno(message);
 876                 if (r < 0)
 877                         log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
 878
 879                 return 0;
 880         }
 881
 882         r = sd_netlink_message_get_type(message, &type);
 883         if (r < 0) {
 884                 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
 885                 return 0;
 886         } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
 887                 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
 888                 return 0;
 889         }
 890
 891         r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
 892         if (r < 0) {
 893                 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
 894                 return 0;
 895         } else if (ifindex <= 0) {
 896                 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
 897                 return 0;
 898         }
 899
 900         r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
 901         if (r < 0) {
 902                 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
 903                 return 0;
 904         }
 905
 906         (void) link_get(m, ifindex, &link);
 907         (void) netdev_get(m, name, &netdev);
 908
 909         switch (type) {
 910         case RTM_NEWLINK:
 911                 if (!link) {
 912                         /* link is new, so add it */
 913                         r = link_add(m, message, &link);
 914                         if (r < 0) {
 915                                 log_warning_errno(r, "Could not process new link message, ignoring: %m");
 916                                 return 0;
 917                         }
 918                 }
 919
 920                 if (netdev) {
 921                         /* netdev exists, so make sure the ifindex matches */
 922                         r = netdev_set_ifindex(netdev, message);
 923                         if (r < 0) {
 924                                 log_warning_errno(r, "Could not process new link message for netdev, ignoring: %m");
 925                                 return 0;
 926                         }
 927                 }
 928
 929                 r = link_update(link, message);
 930                 if (r < 0) {
 931                         log_warning_errno(r, "Could not process link message, ignoring: %m");
 932                         return 0;
 933                 }
 934
 935                 break;
 936
 937         case RTM_DELLINK:
 938                 link_drop(link);
 939                 netdev_drop(netdev);
 940
 941                 break;
 942
 943         default:
 944                 assert_not_reached("Received link message with invalid RTNL message type.");
 945         }
 946
 947         return 1;
 948 }
 949
 950 int manager_rtnl_process_rule(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 951         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *tmp = NULL;
 952         _cleanup_free_ char *from = NULL, *to = NULL;
 953         RoutingPolicyRule *rule = NULL;
 954         const char *iif = NULL, *oif = NULL;
 955         Manager *m = userdata;
 956         unsigned flags;
 957         uint16_t type;
 958         int r;
 959
 960         assert(rtnl);
 961         assert(message);
 962         assert(m);
 963
 964         if (sd_netlink_message_is_error(message)) {
 965                 r = sd_netlink_message_get_errno(message);
 966                 if (r < 0)
 967                         log_message_warning_errno(message, r, "rtnl: failed to receive rule message, ignoring");
 968
 969                 return 0;
 970         }
 971
 972         r = sd_netlink_message_get_type(message, &type);
 973         if (r < 0) {
 974                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
 975                 return 0;
 976         } else if (!IN_SET(type, RTM_NEWRULE, RTM_DELRULE)) {
 977                 log_warning("rtnl: received unexpected message type %u when processing rule, ignoring.", type);
 978                 return 0;
 979         }
 980
 981         r = routing_policy_rule_new(&tmp);
 982         if (r < 0) {
 983                 log_oom();
 984                 return 0;
 985         }
 986
 987         r = sd_rtnl_message_get_family(message, &tmp->family);
 988         if (r < 0) {
 989                 log_warning_errno(r, "rtnl: could not get rule family, ignoring: %m");
 990                 return 0;
 991         } else if (!IN_SET(tmp->family, AF_INET, AF_INET6)) {
 992                 log_debug("rtnl: received rule message with invalid family %d, ignoring.", tmp->family);
 993                 return 0;
 994         }
 995
 996         switch (tmp->family) {
 997         case AF_INET:
 998                 r = sd_netlink_message_read_in_addr(message, FRA_SRC, &tmp->from.in);
 999                 if (r < 0 && r != -ENODATA) {
1000                         log_warning_errno(r, "rtnl: could not get FRA_SRC attribute, ignoring: %m");
1001                         return 0;
1002                 } else if (r >= 0) {
1003                         r = sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(message, &tmp->from_prefixlen);
1004                         if (r < 0) {
1005                                 log_warning_errno(r, "rtnl: received rule message without valid source prefix length, ignoring: %m");
1006                                 return 0;
1007                         }
1008                 }
1009
1010                 r = sd_netlink_message_read_in_addr(message, FRA_DST, &tmp->to.in);
1011                 if (r < 0 && r != -ENODATA) {
1012                         log_warning_errno(r, "rtnl: could not get FRA_DST attribute, ignoring: %m");
1013                         return 0;
1014                 } else if (r >= 0) {
1015                         r = sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(message, &tmp->to_prefixlen);
1016                         if (r < 0) {
1017                                 log_warning_errno(r, "rtnl: received rule message without valid destination prefix length, ignoring: %m");
1018                                 return 0;
1019                         }
1020                 }
1021
1022                 break;
1023
1024         case AF_INET6:
1025                 r = sd_netlink_message_read_in6_addr(message, FRA_SRC, &tmp->from.in6);
1026                 if (r < 0 && r != -ENODATA) {
1027                         log_warning_errno(r, "rtnl: could not get FRA_SRC attribute, ignoring: %m");
1028                         return 0;
1029                 } else if (r >= 0) {
1030                         r = sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(message, &tmp->from_prefixlen);
1031                         if (r < 0) {
1032                                 log_warning_errno(r, "rtnl: received rule message without valid source prefix length, ignoring: %m");
1033                                 return 0;
1034                         }
1035                 }
1036
1037                 r = sd_netlink_message_read_in6_addr(message, FRA_DST, &tmp->to.in6);
1038                 if (r < 0 && r != -ENODATA) {
1039                         log_warning_errno(r, "rtnl: could not get FRA_DST attribute, ignoring: %m");
1040                         return 0;
1041                 } else if (r >= 0) {
1042                         r = sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(message, &tmp->to_prefixlen);
1043                         if (r < 0) {
1044                                 log_warning_errno(r, "rtnl: received rule message without valid destination prefix length, ignoring: %m");
1045                                 return 0;
1046                         }
1047                 }
1048
1049                 break;
1050
1051         default:
1052                 assert_not_reached("Received rule message with unsupported address family");
1053         }
1054
1055         if (tmp->from_prefixlen == 0 && tmp->to_prefixlen == 0)
1056                 return 0;
1057
1058         r = sd_rtnl_message_routing_policy_rule_get_flags(message, &flags);
1059         if (r < 0) {
1060                 log_warning_errno(r, "rtnl: received rule message without valid flag, ignoring: %m");
1061                 return 0;
1062         }
1063         tmp->invert_rule = flags & FIB_RULE_INVERT;
1064
1065         r = sd_netlink_message_read_u32(message, FRA_FWMARK, &tmp->fwmark);
1066         if (r < 0 && r != -ENODATA) {
1067                 log_warning_errno(r, "rtnl: could not get FRA_FWMARK attribute, ignoring: %m");
1068                 return 0;
1069         }
1070
1071         r = sd_netlink_message_read_u32(message, FRA_FWMASK, &tmp->fwmask);
1072         if (r < 0 && r != -ENODATA) {
1073                 log_warning_errno(r, "rtnl: could not get FRA_FWMASK attribute, ignoring: %m");
1074                 return 0;
1075         }
1076
1077         r = sd_netlink_message_read_u32(message, FRA_PRIORITY, &tmp->priority);
1078         if (r < 0 && r != -ENODATA) {
1079                 log_warning_errno(r, "rtnl: could not get FRA_PRIORITY attribute, ignoring: %m");
1080                 return 0;
1081         }
1082
1083         r = sd_netlink_message_read_u32(message, FRA_TABLE, &tmp->table);
1084         if (r < 0 && r != -ENODATA) {
1085                 log_warning_errno(r, "rtnl: could not get FRA_TABLE attribute, ignoring: %m");
1086                 return 0;
1087         }
1088
1089         r = sd_rtnl_message_routing_policy_rule_get_tos(message, &tmp->tos);
1090         if (r < 0 && r != -ENODATA) {
1091                 log_warning_errno(r, "rtnl: could not get ip rule TOS, ignoring: %m");
1092                 return 0;
1093         }
1094
1095         r = sd_netlink_message_read_string(message, FRA_IIFNAME, &iif);
1096         if (r < 0 && r != -ENODATA) {
1097                 log_warning_errno(r, "rtnl: could not get FRA_IIFNAME attribute, ignoring: %m");
1098                 return 0;
1099         }
1100         r = free_and_strdup(&tmp->iif, iif);
1101         if (r < 0)
1102                 return log_oom();
1103
1104         r = sd_netlink_message_read_string(message, FRA_OIFNAME, &oif);
1105         if (r < 0 && r != -ENODATA) {
1106                 log_warning_errno(r, "rtnl: could not get FRA_OIFNAME attribute, ignoring: %m");
1107                 return 0;
1108         }
1109         r = free_and_strdup(&tmp->oif, oif);
1110         if (r < 0)
1111                 return log_oom();
1112
1113         r = sd_netlink_message_read_u8(message, FRA_IP_PROTO, &tmp->protocol);
1114         if (r < 0 && r != -ENODATA) {
1115                 log_warning_errno(r, "rtnl: could not get FRA_IP_PROTO attribute, ignoring: %m");
1116                 return 0;
1117         }
1118
1119         r = sd_netlink_message_read(message, FRA_SPORT_RANGE, sizeof(tmp->sport), &tmp->sport);
1120         if (r < 0 && r != -ENODATA) {
1121                 log_warning_errno(r, "rtnl: could not get FRA_SPORT_RANGE attribute, ignoring: %m");
1122                 return 0;
1123         }
1124
1125         r = sd_netlink_message_read(message, FRA_DPORT_RANGE, sizeof(tmp->dport), &tmp->dport);
1126         if (r < 0 && r != -ENODATA) {
1127                 log_warning_errno(r, "rtnl: could not get FRA_DPORT_RANGE attribute, ignoring: %m");
1128                 return 0;
1129         }
1130
1131         (void) routing_policy_rule_get(m, tmp, &rule);
1132
1133         if (DEBUG_LOGGING) {
1134                 (void) in_addr_to_string(tmp->family, &tmp->from, &from);
1135                 (void) in_addr_to_string(tmp->family, &tmp->to, &to);
1136         }
1137
1138         switch (type) {
1139         case RTM_NEWRULE:
1140                 if (!rule) {
1141                         log_debug("Remembering foreign routing policy rule: %s/%u -> %s/%u, iif: %s, oif: %s, table: %u",
1142                                   from, tmp->from_prefixlen, to, tmp->to_prefixlen, strna(tmp->iif), strna(tmp->oif), tmp->table);
1143                         r = routing_policy_rule_add_foreign(m, tmp, &rule);
1144                         if (r < 0) {
1145                                 log_warning_errno(r, "Could not remember foreign rule, ignoring: %m");
1146                                 return 0;
1147                         }
1148                 }
1149                 break;
1150         case RTM_DELRULE:
1151                 log_debug("Forgetting routing policy rule: %s/%u -> %s/%u, iif: %s, oif: %s, table: %u",
1152                           from, tmp->from_prefixlen, to, tmp->to_prefixlen, strna(tmp->iif), strna(tmp->oif), tmp->table);
1153                 routing_policy_rule_free(rule);
1154
1155                 break;
1156
1157         default:
1158                 assert_not_reached("Received invalid RTNL message type");
1159         }
1160
1161         return 1;
1162 }
1163
1164 int manager_rtnl_process_nexthop(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
1165         _cleanup_(nexthop_freep) NextHop *tmp = NULL;
1166         _cleanup_free_ char *gateway = NULL;
1167         NextHop *nexthop = NULL;
1168         Manager *m = userdata;
1169         Link *link = NULL;
1170         uint16_t type;
1171         int r;
1172
1173         assert(rtnl);
1174         assert(message);
1175         assert(m);
1176
1177         if (sd_netlink_message_is_error(message)) {
1178                 r = sd_netlink_message_get_errno(message);
1179                 if (r < 0)
1180                         log_message_warning_errno(message, r, "rtnl: failed to receive rule message, ignoring");
1181
1182                 return 0;
1183         }
1184
1185         r = sd_netlink_message_get_type(message, &type);
1186         if (r < 0) {
1187                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
1188                 return 0;
1189         } else if (!IN_SET(type, RTM_NEWNEXTHOP, RTM_DELNEXTHOP)) {
1190                 log_warning("rtnl: received unexpected message type %u when processing nexthop, ignoring.", type);
1191                 return 0;
1192         }
1193
1194         r = nexthop_new(&tmp);
1195         if (r < 0)
1196                 return log_oom();
1197
1198         r = sd_rtnl_message_get_family(message, &tmp->family);
1199         if (r < 0) {
1200                 log_warning_errno(r, "rtnl: could not get nexthop family, ignoring: %m");
1201                 return 0;
1202         } else if (!IN_SET(tmp->family, AF_INET, AF_INET6)) {
1203                 log_debug("rtnl: received nexthop message with invalid family %d, ignoring.", tmp->family);
1204                 return 0;
1205         }
1206
1207         switch (tmp->family) {
1208         case AF_INET:
1209                 r = sd_netlink_message_read_in_addr(message, NHA_GATEWAY, &tmp->gw.in);
1210                 if (r < 0 && r != -ENODATA) {
1211                         log_warning_errno(r, "rtnl: could not get NHA_GATEWAY attribute, ignoring: %m");
1212                         return 0;
1213                 }
1214                 break;
1215
1216         case AF_INET6:
1217                 r = sd_netlink_message_read_in6_addr(message, NHA_GATEWAY, &tmp->gw.in6);
1218                 if (r < 0 && r != -ENODATA) {
1219                         log_warning_errno(r, "rtnl: could not get NHA_GATEWAY attribute, ignoring: %m");
1220                         return 0;
1221                 }
1222                 break;
1223
1224         default:
1225                 assert_not_reached("Received rule message with unsupported address family");
1226         }
1227
1228         r = sd_netlink_message_read_u32(message, NHA_ID, &tmp->id);
1229         if (r < 0 && r != -ENODATA) {
1230                 log_warning_errno(r, "rtnl: could not get NHA_ID attribute, ignoring: %m");
1231                 return 0;
1232         }
1233
1234         r = sd_netlink_message_read_u32(message, NHA_OIF, &tmp->oif);
1235         if (r < 0 && r != -ENODATA) {
1236                 log_warning_errno(r, "rtnl: could not get NHA_OIF attribute, ignoring: %m");
1237                 return 0;
1238         }
1239
1240         r = link_get(m, tmp->oif, &link);
1241         if (r < 0 || !link) {
1242                 if (!m->enumerating)
1243                         log_warning("rtnl: received nexthop message for link (%d) we do not know about, ignoring", tmp->oif);
1244                 return 0;
1245         }
1246
1247         (void) nexthop_get(link, tmp, &nexthop);
1248
1249         if (DEBUG_LOGGING)
1250                 (void) in_addr_to_string(tmp->family, &tmp->gw, &gateway);
1251
1252         switch (type) {
1253         case RTM_NEWNEXTHOP:
1254                 if (!nexthop) {
1255                         log_debug("Remembering foreign nexthop: %s, oif: %d, id: %d", gateway, tmp->oif, tmp->id);
1256                         r = nexthop_add_foreign(link, tmp, &nexthop);
1257                         if (r < 0) {
1258                                 log_warning_errno(r, "Could not remember foreign nexthop, ignoring: %m");
1259                                 return 0;
1260                         }
1261                 }
1262                 break;
1263         case RTM_DELNEXTHOP:
1264                 log_debug("Forgetting foreign nexthop: %s, oif: %d, id: %d", gateway, tmp->oif, tmp->id);
1265                 nexthop_free(nexthop);
1266
1267                 break;
1268
1269         default:
1270                 assert_not_reached("Received invalid RTNL message type");
1271         }
1272
1273         return 1;
1274 }
1275
1276 static int systemd_netlink_fd(void) {
1277         int n, fd, rtnl_fd = -EINVAL;
1278
1279         n = sd_listen_fds(true);
1280         if (n <= 0)
1281                 return -EINVAL;
1282
1283         for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++) {
1284                 if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) {
1285                         if (rtnl_fd >= 0)
1286                                 return -EINVAL;
1287
1288                         rtnl_fd = fd;
1289                 }
1290         }
1291
1292         return rtnl_fd;
1293 }
1294
1295 static int manager_connect_genl(Manager *m) {
1296         int r;
1297
1298         assert(m);
1299
1300         r = sd_genl_socket_open(&m->genl);
1301         if (r < 0)
1302                 return r;
1303
1304         r = sd_netlink_inc_rcvbuf(m->genl, RCVBUF_SIZE);
1305         if (r < 0)
1306                 return r;
1307
1308         r = sd_netlink_attach_event(m->genl, m->event, 0);
1309         if (r < 0)
1310                 return r;
1311
1312         return 0;
1313 }
1314
1315 static int manager_connect_rtnl(Manager *m) {
1316         int fd, r;
1317
1318         assert(m);
1319
1320         fd = systemd_netlink_fd();
1321         if (fd < 0)
1322                 r = sd_netlink_open(&m->rtnl);
1323         else
1324                 r = sd_netlink_open_fd(&m->rtnl, fd);
1325         if (r < 0)
1326                 return r;
1327
1328         r = sd_netlink_inc_rcvbuf(m->rtnl, RCVBUF_SIZE);
1329         if (r < 0)
1330                 return r;
1331
1332         r = sd_netlink_attach_event(m->rtnl, m->event, 0);
1333         if (r < 0)
1334                 return r;
1335
1336         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link");
1337         if (r < 0)
1338                 return r;
1339
1340         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link");
1341         if (r < 0)
1342                 return r;
1343
1344         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address");
1345         if (r < 0)
1346                 return r;
1347
1348         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address");
1349         if (r < 0)
1350                 return r;
1351
1352         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWNEIGH, &manager_rtnl_process_neighbor, NULL, m, "network-rtnl_process_neighbor");
1353         if (r < 0)
1354                 return r;
1355
1356         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELNEIGH, &manager_rtnl_process_neighbor, NULL, m, "network-rtnl_process_neighbor");
1357         if (r < 0)
1358                 return r;
1359
1360         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route");
1361         if (r < 0)
1362                 return r;
1363
1364         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route");
1365         if (r < 0)
1366                 return r;
1367
1368         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule");
1369         if (r < 0)
1370                 return r;
1371
1372         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule");
1373         if (r < 0)
1374                 return r;
1375
1376         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWNEXTHOP, &manager_rtnl_process_nexthop, NULL, m, "network-rtnl_process_nexthop");
1377         if (r < 0)
1378                 return r;
1379
1380         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELNEXTHOP, &manager_rtnl_process_nexthop, NULL, m, "network-rtnl_process_nexthop");
1381         if (r < 0)
1382                 return r;
1383
1384         return 0;
1385 }
1386
1387 static int ordered_set_put_in_addr_data(OrderedSet *s, const struct in_addr_data *address) {
1388         char *p;
1389         int r;
1390
1391         assert(s);
1392         assert(address);
1393
1394         r = in_addr_to_string(address->family, &address->address, &p);
1395         if (r < 0)
1396                 return r;
1397
1398         r = ordered_set_consume(s, p);
1399         if (r == -EEXIST)
1400                 return 0;
1401
1402         return r;
1403 }
1404
1405 static int ordered_set_put_in_addr_datav(OrderedSet *s, const struct in_addr_data *addresses, unsigned n) {
1406         int r, c = 0;
1407         unsigned i;
1408
1409         assert(s);
1410         assert(addresses || n == 0);
1411
1412         for (i = 0; i < n; i++) {
1413                 r = ordered_set_put_in_addr_data(s, addresses+i);
1414                 if (r < 0)
1415                         return r;
1416
1417                 c += r;
1418         }
1419
1420         return c;
1421 }
1422
1423 static int ordered_set_put_in4_addr(OrderedSet *s, const struct in_addr *address) {
1424         char *p;
1425         int r;
1426
1427         assert(s);
1428         assert(address);
1429
1430         r = in_addr_to_string(AF_INET, (const union in_addr_union*) address, &p);
1431         if (r < 0)
1432                 return r;
1433
1434         r = ordered_set_consume(s, p);
1435         if (r == -EEXIST)
1436                 return 0;
1437
1438         return r;
1439 }
1440
1441 static int ordered_set_put_in4_addrv(OrderedSet *s,
1442                                      const struct in_addr *addresses,
1443                                      size_t n,
1444                                      bool (*predicate)(const struct in_addr *addr)) {
1445         int r, c = 0;
1446         size_t i;
1447
1448         assert(s);
1449         assert(n == 0 || addresses);
1450
1451         for (i = 0; i < n; i++) {
1452                 if (predicate && !predicate(&addresses[i]))
1453                         continue;
1454                 r = ordered_set_put_in4_addr(s, addresses+i);
1455                 if (r < 0)
1456                         return r;
1457
1458                 c += r;
1459         }
1460
1461         return c;
1462 }
1463
1464 static int manager_save(Manager *m) {
1465         _cleanup_ordered_set_free_free_ OrderedSet *dns = NULL, *ntp = NULL, *sip = NULL, *search_domains = NULL, *route_domains = NULL;
1466         const char *operstate_str, *carrier_state_str, *address_state_str;
1467         LinkOperationalState operstate = LINK_OPERSTATE_OFF;
1468         LinkCarrierState carrier_state = LINK_CARRIER_STATE_OFF;
1469         LinkAddressState address_state = LINK_ADDRESS_STATE_OFF;
1470         _cleanup_free_ char *temp_path = NULL;
1471         _cleanup_strv_free_ char **p = NULL;
1472         _cleanup_fclose_ FILE *f = NULL;
1473         Link *link;
1474         Iterator i;
1475         int r;
1476
1477         assert(m);
1478         assert(m->state_file);
1479
1480         /* We add all NTP and DNS server to a set, to filter out duplicates */
1481         dns = ordered_set_new(&string_hash_ops);
1482         if (!dns)
1483                 return -ENOMEM;
1484
1485         ntp = ordered_set_new(&string_hash_ops);
1486         if (!ntp)
1487                 return -ENOMEM;
1488
1489        sip = ordered_set_new(&string_hash_ops);
1490        if (!sip)
1491                 return -ENOMEM;
1492
1493         search_domains = ordered_set_new(&dns_name_hash_ops);
1494         if (!search_domains)
1495                 return -ENOMEM;
1496
1497         route_domains = ordered_set_new(&dns_name_hash_ops);
1498         if (!route_domains)
1499                 return -ENOMEM;
1500
1501         HASHMAP_FOREACH(link, m->links, i) {
1502                 if (link->flags & IFF_LOOPBACK)
1503                         continue;
1504
1505                 if (link->operstate > operstate)
1506                         operstate = link->operstate;
1507
1508                 if (link->carrier_state > carrier_state)
1509                         carrier_state = link->carrier_state;
1510
1511                 if (link->address_state > address_state)
1512                         address_state = link->address_state;
1513
1514                 if (!link->network)
1515                         continue;
1516
1517                 /* First add the static configured entries */
1518                 r = ordered_set_put_in_addr_datav(dns, link->network->dns, link->network->n_dns);
1519                 if (r < 0)
1520                         return r;
1521
1522                 r = ordered_set_put_strdupv(ntp, link->ntp ?: link->network->ntp);
1523                 if (r < 0)
1524                         return r;
1525
1526                 r = ordered_set_put_string_set(search_domains, link->search_domains ?: link->network->search_domains);
1527                 if (r < 0)
1528                         return r;
1529
1530                 r = ordered_set_put_string_set(route_domains, link->route_domains ?: link->network->route_domains);
1531                 if (r < 0)
1532                         return r;
1533
1534                 if (!link->dhcp_lease)
1535                         continue;
1536
1537                 /* Secondly, add the entries acquired via DHCP */
1538                 if (link->network->dhcp_use_dns) {
1539                         const struct in_addr *addresses;
1540
1541                         r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
1542                         if (r > 0) {
1543                                 r = ordered_set_put_in4_addrv(dns, addresses, r, in4_addr_is_non_local);
1544                                 if (r < 0)
1545                                         return r;
1546                         } else if (r < 0 && r != -ENODATA)
1547                                 return r;
1548                 }
1549
1550                 if (link->network->dhcp_use_ntp) {
1551                         const struct in_addr *addresses;
1552
1553                         r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
1554                         if (r > 0) {
1555                                 r = ordered_set_put_in4_addrv(ntp, addresses, r, in4_addr_is_non_local);
1556                                 if (r < 0)
1557                                         return r;
1558                         } else if (r < 0 && r != -ENODATA)
1559                                 return r;
1560                 }
1561
1562                 if (link->network->dhcp_use_sip) {
1563                         const struct in_addr *addresses;
1564
1565                         r = sd_dhcp_lease_get_sip(link->dhcp_lease, &addresses);
1566                         if (r > 0) {
1567                                 r = ordered_set_put_in4_addrv(sip, addresses, r, in4_addr_is_non_local);
1568                                 if (r < 0)
1569                                         return r;
1570                         } else if (r < 0 && r != -ENODATA)
1571                                 return r;
1572                 }
1573
1574                 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
1575                         const char *domainname;
1576                         char **domains = NULL;
1577
1578                         OrderedSet *target_domains = (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) ? search_domains : route_domains;
1579                         r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname);
1580                         if (r >= 0) {
1581                                 r = ordered_set_put_strdup(target_domains, domainname);
1582                                 if (r < 0)
1583                                         return r;
1584                         } else if (r != -ENODATA)
1585                                 return r;
1586
1587                         r = sd_dhcp_lease_get_search_domains(link->dhcp_lease, &domains);
1588                         if (r >= 0) {
1589                                 r = ordered_set_put_strdupv(target_domains, domains);
1590                                 if (r < 0)
1591                                         return r;
1592                         } else if (r != -ENODATA)
1593                                 return r;
1594                 }
1595         }
1596
1597         if (carrier_state >= LINK_CARRIER_STATE_ENSLAVED)
1598                 carrier_state = LINK_CARRIER_STATE_CARRIER;
1599
1600         operstate_str = link_operstate_to_string(operstate);
1601         assert(operstate_str);
1602
1603         carrier_state_str = link_carrier_state_to_string(carrier_state);
1604         assert(carrier_state_str);
1605
1606         address_state_str = link_address_state_to_string(address_state);
1607         assert(address_state_str);
1608
1609         r = fopen_temporary(m->state_file, &f, &temp_path);
1610         if (r < 0)
1611                 return r;
1612
1613         (void) fchmod(fileno(f), 0644);
1614
1615         fprintf(f,
1616                 "# This is private data. Do not parse.\n"
1617                 "OPER_STATE=%s\n"
1618                 "CARRIER_STATE=%s\n"
1619                 "ADDRESS_STATE=%s\n",
1620                 operstate_str, carrier_state_str, address_state_str);
1621
1622         ordered_set_print(f, "DNS=", dns);
1623         ordered_set_print(f, "NTP=", ntp);
1624         ordered_set_print(f, "SIP=", sip);
1625         ordered_set_print(f, "DOMAINS=", search_domains);
1626         ordered_set_print(f, "ROUTE_DOMAINS=", route_domains);
1627
1628         r = routing_policy_serialize_rules(m->rules, f);
1629         if (r < 0)
1630                 goto fail;
1631
1632         r = fflush_and_check(f);
1633         if (r < 0)
1634                 goto fail;
1635
1636         if (rename(temp_path, m->state_file) < 0) {
1637                 r = -errno;
1638                 goto fail;
1639         }
1640
1641         if (m->operational_state != operstate) {
1642                 m->operational_state = operstate;
1643                 if (strv_extend(&p, "OperationalState") < 0)
1644                         log_oom();
1645         }
1646
1647         if (m->carrier_state != carrier_state) {
1648                 m->carrier_state = carrier_state;
1649                 if (strv_extend(&p, "CarrierState") < 0)
1650                         log_oom();
1651         }
1652
1653         if (m->address_state != address_state) {
1654                 m->address_state = address_state;
1655                 if (strv_extend(&p, "AddressState") < 0)
1656                         log_oom();
1657         }
1658
1659         if (p) {
1660                 r = manager_send_changed_strv(m, p);
1661                 if (r < 0)
1662                         log_error_errno(r, "Could not emit changed properties: %m");
1663         }
1664
1665         m->dirty = false;
1666
1667         return 0;
1668
1669 fail:
1670         (void) unlink(m->state_file);
1671         (void) unlink(temp_path);
1672
1673         return log_error_errno(r, "Failed to save network state to %s: %m", m->state_file);
1674 }
1675
1676 static int manager_dirty_handler(sd_event_source *s, void *userdata) {
1677         Manager *m = userdata;
1678         Link *link;
1679         Iterator i;
1680
1681         assert(m);
1682
1683         if (m->dirty)
1684                 manager_save(m);
1685
1686         SET_FOREACH(link, m->dirty_links, i)
1687                 if (link_save(link) >= 0)
1688                         link_clean(link);
1689
1690         return 1;
1691 }
1692
1693 static int signal_terminate_callback(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
1694         Manager *m = userdata;
1695
1696         assert(m);
1697         m->restarting = false;
1698
1699         log_debug("Terminate operation initiated.");
1700
1701         return sd_event_exit(sd_event_source_get_event(s), 0);
1702 }
1703
1704 static int signal_restart_callback(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
1705         Manager *m = userdata;
1706
1707         assert(m);
1708         m->restarting = true;
1709
1710         log_debug("Restart operation initiated.");
1711
1712         return sd_event_exit(sd_event_source_get_event(s), 0);
1713 }
1714
1715 int manager_new(Manager **ret) {
1716         _cleanup_(manager_freep) Manager *m = NULL;
1717         int r;
1718
1719         m = new(Manager, 1);
1720         if (!m)
1721                 return -ENOMEM;
1722
1723         *m = (Manager) {
1724                 .speed_meter_interval_usec = SPEED_METER_DEFAULT_TIME_INTERVAL,
1725         };
1726
1727         m->state_file = strdup("/run/systemd/netif/state");
1728         if (!m->state_file)
1729                 return -ENOMEM;
1730
1731         r = sd_event_default(&m->event);
1732         if (r < 0)
1733                 return r;
1734
1735         assert_se(sigprocmask_many(SIG_SETMASK, NULL, SIGINT, SIGTERM, SIGUSR2, -1) >= 0);
1736
1737         (void) sd_event_set_watchdog(m->event, true);
1738         (void) sd_event_add_signal(m->event, NULL, SIGTERM, signal_terminate_callback, m);
1739         (void) sd_event_add_signal(m->event, NULL, SIGINT, signal_terminate_callback, m);
1740         (void) sd_event_add_signal(m->event, NULL, SIGUSR2, signal_restart_callback, m);
1741
1742         r = sd_event_add_post(m->event, NULL, manager_dirty_handler, m);
1743         if (r < 0)
1744                 return r;
1745
1746         r = manager_connect_rtnl(m);
1747         if (r < 0)
1748                 return r;
1749
1750         r = manager_connect_genl(m);
1751         if (r < 0)
1752                 return r;
1753
1754         r = manager_connect_udev(m);
1755         if (r < 0)
1756                 return r;
1757
1758         r = sd_resolve_default(&m->resolve);
1759         if (r < 0)
1760                 return r;
1761
1762         r = sd_resolve_attach_event(m->resolve, m->event, 0);
1763         if (r < 0)
1764                 return r;
1765
1766         r = setup_default_address_pool(m);
1767         if (r < 0)
1768                 return r;
1769
1770         m->duid.type = DUID_TYPE_EN;
1771
1772         (void) routing_policy_load_rules(m->state_file, &m->rules_saved);
1773
1774         *ret = TAKE_PTR(m);
1775
1776         return 0;
1777 }
1778
1779 void manager_free(Manager *m) {
1780         struct in6_addr *a;
1781         AddressPool *pool;
1782         Link *link;
1783
1784         if (!m)
1785                 return;
1786
1787         free(m->state_file);
1788
1789         while ((a = hashmap_first_key(m->dhcp6_prefixes)))
1790                 (void) dhcp6_prefix_remove(m, a);
1791         m->dhcp6_prefixes = hashmap_free(m->dhcp6_prefixes);
1792
1793         while ((link = hashmap_steal_first(m->links))) {
1794                 if (link->dhcp6_client)
1795                         (void) dhcp6_lease_pd_prefix_lost(link->dhcp6_client, link);
1796
1797                 (void) link_stop_clients(link, true);
1798
1799                 link_unref(link);
1800         }
1801
1802         m->dirty_links = set_free_with_destructor(m->dirty_links, link_unref);
1803         m->links_requesting_uuid = set_free_with_destructor(m->links_requesting_uuid, link_unref);
1804         m->links = hashmap_free_with_destructor(m->links, link_unref);
1805
1806         m->duids_requesting_uuid = set_free(m->duids_requesting_uuid);
1807         m->networks = ordered_hashmap_free_with_destructor(m->networks, network_unref);
1808
1809         m->netdevs = hashmap_free_with_destructor(m->netdevs, netdev_unref);
1810
1811         while ((pool = m->address_pools))
1812                 address_pool_free(pool);
1813
1814         /* routing_policy_rule_free() access m->rules and m->rules_foreign.
1815          * So, it is necessary to set NULL after the sets are freed. */
1816         m->rules = set_free_with_destructor(m->rules, routing_policy_rule_free);
1817         m->rules_foreign = set_free_with_destructor(m->rules_foreign, routing_policy_rule_free);
1818         set_free_with_destructor(m->rules_saved, routing_policy_rule_free);
1819
1820         sd_netlink_unref(m->rtnl);
1821         sd_netlink_unref(m->genl);
1822         sd_resolve_unref(m->resolve);
1823
1824         sd_event_source_unref(m->speed_meter_event_source);
1825         sd_event_unref(m->event);
1826
1827         sd_device_monitor_unref(m->device_monitor);
1828
1829         bus_verify_polkit_async_registry_free(m->polkit_registry);
1830         sd_bus_flush_close_unref(m->bus);
1831
1832         free(m->dynamic_timezone);
1833         free(m->dynamic_hostname);
1834
1835         free(m);
1836 }
1837
1838 int manager_start(Manager *m) {
1839         Link *link;
1840         Iterator i;
1841         int r;
1842
1843         assert(m);
1844
1845         r = manager_start_speed_meter(m);
1846         if (r < 0)
1847                 return log_error_errno(r, "Failed to initialize speed meter: %m");
1848
1849         /* The dirty handler will deal with future serialization, but the first one
1850            must be done explicitly. */
1851
1852         manager_save(m);
1853
1854         HASHMAP_FOREACH(link, m->links, i)
1855                 link_save(link);
1856
1857         return 0;
1858 }
1859
1860 int manager_load_config(Manager *m) {
1861         int r;
1862
1863         /* update timestamp */
1864         paths_check_timestamp(NETWORK_DIRS, &m->network_dirs_ts_usec, true);
1865
1866         r = netdev_load(m, false);
1867         if (r < 0)
1868                 return r;
1869
1870         r = network_load(m, &m->networks);
1871         if (r < 0)
1872                 return r;
1873
1874         return 0;
1875 }
1876
1877 bool manager_should_reload(Manager *m) {
1878         return paths_check_timestamp(NETWORK_DIRS, &m->network_dirs_ts_usec, false);
1879 }
1880
1881 int manager_rtnl_enumerate_links(Manager *m) {
1882         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1883         sd_netlink_message *link;
1884         int r;
1885
1886         assert(m);
1887         assert(m->rtnl);
1888
1889         r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);
1890         if (r < 0)
1891                 return r;
1892
1893         r = sd_netlink_message_request_dump(req, true);
1894         if (r < 0)
1895                 return r;
1896
1897         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1898         if (r < 0)
1899                 return r;
1900
1901         for (link = reply; link; link = sd_netlink_message_next(link)) {
1902                 int k;
1903
1904                 m->enumerating = true;
1905
1906                 k = manager_rtnl_process_link(m->rtnl, link, m);
1907                 if (k < 0)
1908                         r = k;
1909
1910                 m->enumerating = false;
1911         }
1912
1913         return r;
1914 }
1915
1916 int manager_rtnl_enumerate_addresses(Manager *m) {
1917         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1918         sd_netlink_message *addr;
1919         int r;
1920
1921         assert(m);
1922         assert(m->rtnl);
1923
1924         r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, 0);
1925         if (r < 0)
1926                 return r;
1927
1928         r = sd_netlink_message_request_dump(req, true);
1929         if (r < 0)
1930                 return r;
1931
1932         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1933         if (r < 0)
1934                 return r;
1935
1936         for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
1937                 int k;
1938
1939                 m->enumerating = true;
1940
1941                 k = manager_rtnl_process_address(m->rtnl, addr, m);
1942                 if (k < 0)
1943                         r = k;
1944
1945                 m->enumerating = false;
1946         }
1947
1948         return r;
1949 }
1950
1951 int manager_rtnl_enumerate_neighbors(Manager *m) {
1952         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1953         sd_netlink_message *neigh;
1954         int r;
1955
1956         assert(m);
1957         assert(m->rtnl);
1958
1959         r = sd_rtnl_message_new_neigh(m->rtnl, &req, RTM_GETNEIGH, 0, AF_UNSPEC);
1960         if (r < 0)
1961                 return r;
1962
1963         r = sd_netlink_message_request_dump(req, true);
1964         if (r < 0)
1965                 return r;
1966
1967         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1968         if (r < 0)
1969                 return r;
1970
1971         for (neigh = reply; neigh; neigh = sd_netlink_message_next(neigh)) {
1972                 int k;
1973
1974                 m->enumerating = true;
1975
1976                 k = manager_rtnl_process_neighbor(m->rtnl, neigh, m);
1977                 if (k < 0)
1978                         r = k;
1979
1980                 m->enumerating = false;
1981         }
1982
1983         return r;
1984 }
1985
1986 int manager_rtnl_enumerate_routes(Manager *m) {
1987         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1988         sd_netlink_message *route;
1989         int r;
1990
1991         assert(m);
1992         assert(m->rtnl);
1993
1994         r = sd_rtnl_message_new_route(m->rtnl, &req, RTM_GETROUTE, 0, 0);
1995         if (r < 0)
1996                 return r;
1997
1998         r = sd_netlink_message_request_dump(req, true);
1999         if (r < 0)
2000                 return r;
2001
2002         r = sd_netlink_call(m->rtnl, req, 0, &reply);
2003         if (r < 0)
2004                 return r;
2005
2006         for (route = reply; route; route = sd_netlink_message_next(route)) {
2007                 int k;
2008
2009                 m->enumerating = true;
2010
2011                 k = manager_rtnl_process_route(m->rtnl, route, m);
2012                 if (k < 0)
2013                         r = k;
2014
2015                 m->enumerating = false;
2016         }
2017
2018         return r;
2019 }
2020
2021 int manager_rtnl_enumerate_rules(Manager *m) {
2022         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2023         sd_netlink_message *rule;
2024         int r;
2025
2026         assert(m);
2027         assert(m->rtnl);
2028
2029         r = sd_rtnl_message_new_routing_policy_rule(m->rtnl, &req, RTM_GETRULE, 0);
2030         if (r < 0)
2031                 return r;
2032
2033         r = sd_netlink_message_request_dump(req, true);
2034         if (r < 0)
2035                 return r;
2036
2037         r = sd_netlink_call(m->rtnl, req, 0, &reply);
2038         if (r < 0) {
2039                 if (r == -EOPNOTSUPP) {
2040                         log_debug("FIB Rules are not supported by the kernel. Ignoring.");
2041                         return 0;
2042                 }
2043
2044                 return r;
2045         }
2046
2047         for (rule = reply; rule; rule = sd_netlink_message_next(rule)) {
2048                 int k;
2049
2050                 m->enumerating = true;
2051
2052                 k = manager_rtnl_process_rule(m->rtnl, rule, m);
2053                 if (k < 0)
2054                         r = k;
2055
2056                 m->enumerating = false;
2057         }
2058
2059         return r;
2060 }
2061
2062 int manager_rtnl_enumerate_nexthop(Manager *m) {
2063         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2064         sd_netlink_message *nexthop;
2065         int r;
2066
2067         assert(m);
2068         assert(m->rtnl);
2069
2070         r = sd_rtnl_message_new_nexthop(m->rtnl, &req, RTM_GETNEXTHOP, 0, 0);
2071         if (r < 0)
2072                 return r;
2073
2074         r = sd_netlink_message_request_dump(req, true);
2075         if (r < 0)
2076                 return r;
2077
2078         r = sd_netlink_call(m->rtnl, req, 0, &reply);
2079         if (r < 0) {
2080                 if (r == -EOPNOTSUPP) {
2081                         log_debug("Nexthop are not supported by the kernel. Ignoring.");
2082                         return 0;
2083                 }
2084
2085                 return r;
2086         }
2087
2088         for (nexthop = reply; nexthop; nexthop = sd_netlink_message_next(nexthop)) {
2089                 int k;
2090
2091                 m->enumerating = true;
2092
2093                 k = manager_rtnl_process_nexthop(m->rtnl, nexthop, m);
2094                 if (k < 0)
2095                         r = k;
2096
2097                 m->enumerating = false;
2098         }
2099
2100         return r;
2101 }
2102
2103 int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, union in_addr_union *found) {
2104         AddressPool *p;
2105         int r;
2106
2107         assert(m);
2108         assert(prefixlen > 0);
2109         assert(found);
2110
2111         LIST_FOREACH(address_pools, p, m->address_pools) {
2112                 if (p->family != family)
2113                         continue;
2114
2115                 r = address_pool_acquire(p, prefixlen, found);
2116                 if (r != 0)
2117                         return r;
2118         }
2119
2120         return 0;
2121 }
2122
2123 Link* manager_find_uplink(Manager *m, Link *exclude) {
2124         _cleanup_free_ struct local_address *gateways = NULL;
2125         int n, i;
2126
2127         assert(m);
2128
2129         /* Looks for a suitable "uplink", via black magic: an
2130          * interface that is up and where the default route with the
2131          * highest priority points to. */
2132
2133         n = local_gateways(m->rtnl, 0, AF_UNSPEC, &gateways);
2134         if (n < 0) {
2135                 log_warning_errno(n, "Failed to determine list of default gateways: %m");
2136                 return NULL;
2137         }
2138
2139         for (i = 0; i < n; i++) {
2140                 Link *link;
2141
2142                 link = hashmap_get(m->links, INT_TO_PTR(gateways[i].ifindex));
2143                 if (!link) {
2144                         log_debug("Weird, found a gateway for a link we don't know. Ignoring.");
2145                         continue;
2146                 }
2147
2148                 if (link == exclude)
2149                         continue;
2150
2151                 if (link->operstate < LINK_OPERSTATE_ROUTABLE)
2152                         continue;
2153
2154                 return link;
2155         }
2156
2157         return NULL;
2158 }
2159
2160 void manager_dirty(Manager *manager) {
2161         assert(manager);
2162
2163         /* the serialized state in /run is no longer up-to-date */
2164         manager->dirty = true;
2165 }
2166
2167 static int set_hostname_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2168         Manager *manager = userdata;
2169         const sd_bus_error *e;
2170
2171         assert(m);
2172         assert(manager);
2173
2174         e = sd_bus_message_get_error(m);
2175         if (e)
2176                 log_warning_errno(sd_bus_error_get_errno(e), "Could not set hostname: %s", e->message);
2177
2178         return 1;
2179 }
2180
2181 int manager_set_hostname(Manager *m, const char *hostname) {
2182         int r;
2183
2184         log_debug("Setting transient hostname: '%s'", strna(hostname));
2185
2186         if (free_and_strdup(&m->dynamic_hostname, hostname) < 0)
2187                 return log_oom();
2188
2189         if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
2190                 log_debug("Not connected to system bus, setting hostname later.");
2191                 return 0;
2192         }
2193
2194         r = sd_bus_call_method_async(
2195                         m->bus,
2196                         NULL,
2197                         "org.freedesktop.hostname1",
2198                         "/org/freedesktop/hostname1",
2199                         "org.freedesktop.hostname1",
2200                         "SetHostname",
2201                         set_hostname_handler,
2202                         m,
2203                         "sb",
2204                         hostname,
2205                         false);
2206
2207         if (r < 0)
2208                 return log_error_errno(r, "Could not set transient hostname: %m");
2209
2210         return 0;
2211 }
2212
2213 static int set_timezone_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2214         Manager *manager = userdata;
2215         const sd_bus_error *e;
2216
2217         assert(m);
2218         assert(manager);
2219
2220         e = sd_bus_message_get_error(m);
2221         if (e)
2222                 log_warning_errno(sd_bus_error_get_errno(e), "Could not set timezone: %s", e->message);
2223
2224         return 1;
2225 }
2226
2227 int manager_set_timezone(Manager *m, const char *tz) {
2228         int r;
2229
2230         assert(m);
2231         assert(tz);
2232
2233         log_debug("Setting system timezone: '%s'", tz);
2234         if (free_and_strdup(&m->dynamic_timezone, tz) < 0)
2235                 return log_oom();
2236
2237         if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
2238                 log_debug("Not connected to system bus, setting timezone later.");
2239                 return 0;
2240         }
2241
2242         r = sd_bus_call_method_async(
2243                         m->bus,
2244                         NULL,
2245                         "org.freedesktop.timedate1",
2246                         "/org/freedesktop/timedate1",
2247                         "org.freedesktop.timedate1",
2248                         "SetTimezone",
2249                         set_timezone_handler,
2250                         m,
2251                         "sb",
2252                         tz,
2253                         false);
2254         if (r < 0)
2255                 return log_error_errno(r, "Could not set timezone: %m");
2256
2257         return 0;
2258 }
2259
2260 int manager_request_product_uuid(Manager *m, Link *link) {
2261         int r;
2262
2263         assert(m);
2264
2265         if (m->has_product_uuid)
2266                 return 0;
2267
2268         log_debug("Requesting product UUID");
2269
2270         if (link) {
2271                 DUID *duid;
2272
2273                 assert_se(duid = link_get_duid(link));
2274
2275                 r = set_ensure_allocated(&m->links_requesting_uuid, NULL);
2276                 if (r < 0)
2277                         return log_oom();
2278
2279                 r = set_ensure_allocated(&m->duids_requesting_uuid, NULL);
2280                 if (r < 0)
2281                         return log_oom();
2282
2283                 r = set_put(m->links_requesting_uuid, link);
2284                 if (r < 0)
2285                         return log_oom();
2286
2287                 r = set_put(m->duids_requesting_uuid, duid);
2288                 if (r < 0)
2289                         return log_oom();
2290
2291                 link_ref(link);
2292         }
2293
2294         if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
2295                 log_debug("Not connected to system bus, requesting product UUID later.");
2296                 return 0;
2297         }
2298
2299         r = sd_bus_call_method_async(
2300                         m->bus,
2301                         NULL,
2302                         "org.freedesktop.hostname1",
2303                         "/org/freedesktop/hostname1",
2304                         "org.freedesktop.hostname1",
2305                         "GetProductUUID",
2306                         get_product_uuid_handler,
2307                         m,
2308                         "b",
2309                         false);
2310         if (r < 0)
2311                 return log_warning_errno(r, "Failed to get product UUID: %m");
2312
2313         return 0;
2314 }