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-polkit.h"
  15 #include "bus-util.h"
  16 #include "conf-parser.h"
  17 #include "def.h"
  18 #include "device-private.h"
  19 #include "device-util.h"
  20 #include "dns-domain.h"
  21 #include "fd-util.h"
  22 #include "fileio.h"
  23 #include "local-addresses.h"
  24 #include "netlink-util.h"
  25 #include "network-internal.h"
  26 #include "networkd-dhcp6.h"
  27 #include "networkd-link-bus.h"
  28 #include "networkd-manager-bus.h"
  29 #include "networkd-manager.h"
  30 #include "networkd-network-bus.h"
  31 #include "networkd-speed-meter.h"
  32 #include "ordered-set.h"
  33 #include "path-util.h"
  34 #include "set.h"
  35 #include "signal-util.h"
  36 #include "strv.h"
  37 #include "sysctl-util.h"
  38 #include "tmpfile-util.h"
  39 #include "udev-util.h"
  40 #include "virt.h"
  41
  42 /* use 128 MB for receive socket kernel queue. */
  43 #define RCVBUF_SIZE    (128*1024*1024)
  44
  45 static int log_message_warning_errno(sd_netlink_message *m, int err, const char *msg) {
  46         const char *err_msg = NULL;
  47
  48         (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
  49         return log_warning_errno(err, "%s: %s%s%m", msg, strempty(err_msg), err_msg ? " " : "");
  50 }
  51
  52 static int setup_default_address_pool(Manager *m) {
  53         AddressPool *p;
  54         int r;
  55
  56         assert(m);
  57
  58         /* Add in the well-known private address ranges. */
  59
  60         r = address_pool_new_from_string(m, &p, AF_INET6, "fd00::", 8);
  61         if (r < 0)
  62                 return r;
  63
  64         r = address_pool_new_from_string(m, &p, AF_INET, "10.0.0.0", 8);
  65         if (r < 0)
  66                 return r;
  67
  68         r = address_pool_new_from_string(m, &p, AF_INET, "172.16.0.0", 12);
  69         if (r < 0)
  70                 return r;
  71
  72         r = address_pool_new_from_string(m, &p, AF_INET, "192.168.0.0", 16);
  73         if (r < 0)
  74                 return r;
  75
  76         return 0;
  77 }
  78
  79 static int manager_reset_all(Manager *m) {
  80         Link *link;
  81         Iterator i;
  82         int r;
  83
  84         assert(m);
  85
  86         HASHMAP_FOREACH(link, m->links, i) {
  87                 r = link_carrier_reset(link);
  88                 if (r < 0)
  89                         log_link_warning_errno(link, r, "Could not reset carrier: %m");
  90         }
  91
  92         return 0;
  93 }
  94
  95 static int match_prepare_for_sleep(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
  96         Manager *m = userdata;
  97         int b, r;
  98
  99         assert(message);
 100         assert(m);
 101
 102         r = sd_bus_message_read(message, "b", &b);
 103         if (r < 0) {
 104                 log_debug_errno(r, "Failed to parse PrepareForSleep signal: %m");
 105                 return 0;
 106         }
 107
 108         if (b)
 109                 return 0;
 110
 111         log_debug("Coming back from suspend, resetting all connections...");
 112
 113         (void) manager_reset_all(m);
 114
 115         return 0;
 116 }
 117
 118 static int on_connected(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
 119         Manager *m = userdata;
 120
 121         assert(message);
 122         assert(m);
 123
 124         /* Did we get a timezone or transient hostname from DHCP while D-Bus wasn't up yet? */
 125         if (m->dynamic_hostname)
 126                 (void) manager_set_hostname(m, m->dynamic_hostname);
 127         if (m->dynamic_timezone)
 128                 (void) manager_set_timezone(m, m->dynamic_timezone);
 129         if (m->links_requesting_uuid)
 130                 (void) manager_request_product_uuid(m, NULL);
 131
 132         return 0;
 133 }
 134
 135 int manager_connect_bus(Manager *m) {
 136         int r;
 137
 138         assert(m);
 139
 140         if (m->bus)
 141                 return 0;
 142
 143         r = bus_open_system_watch_bind_with_description(&m->bus, "bus-api-network");
 144         if (r < 0)
 145                 return log_error_errno(r, "Failed to connect to bus: %m");
 146
 147         r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/network1", "org.freedesktop.network1.Manager", manager_vtable, m);
 148         if (r < 0)
 149                 return log_error_errno(r, "Failed to add manager object vtable: %m");
 150
 151         r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/link", "org.freedesktop.network1.Link", link_vtable, link_object_find, m);
 152         if (r < 0)
 153                return log_error_errno(r, "Failed to add link object vtable: %m");
 154
 155         r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/link", link_node_enumerator, m);
 156         if (r < 0)
 157                 return log_error_errno(r, "Failed to add link enumerator: %m");
 158
 159         r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/network", "org.freedesktop.network1.Network", network_vtable, network_object_find, m);
 160         if (r < 0)
 161                return log_error_errno(r, "Failed to add network object vtable: %m");
 162
 163         r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/network", network_node_enumerator, m);
 164         if (r < 0)
 165                 return log_error_errno(r, "Failed to add network enumerator: %m");
 166
 167         r = sd_bus_request_name_async(m->bus, NULL, "org.freedesktop.network1", 0, NULL, NULL);
 168         if (r < 0)
 169                 return log_error_errno(r, "Failed to request name: %m");
 170
 171         r = sd_bus_attach_event(m->bus, m->event, 0);
 172         if (r < 0)
 173                 return log_error_errno(r, "Failed to attach bus to event loop: %m");
 174
 175         r = sd_bus_match_signal_async(
 176                         m->bus,
 177                         NULL,
 178                         "org.freedesktop.DBus.Local",
 179                         NULL,
 180                         "org.freedesktop.DBus.Local",
 181                         "Connected",
 182                         on_connected, NULL, m);
 183         if (r < 0)
 184                 return log_error_errno(r, "Failed to request match on Connected signal: %m");
 185
 186         r = sd_bus_match_signal_async(
 187                         m->bus,
 188                         NULL,
 189                         "org.freedesktop.login1",
 190                         "/org/freedesktop/login1",
 191                         "org.freedesktop.login1.Manager",
 192                         "PrepareForSleep",
 193                         match_prepare_for_sleep, NULL, m);
 194         if (r < 0)
 195                 log_warning_errno(r, "Failed to request match for PrepareForSleep, ignoring: %m");
 196
 197         return 0;
 198 }
 199
 200 static int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) {
 201         Manager *m = userdata;
 202         DeviceAction action;
 203         Link *link = NULL;
 204         int r, ifindex;
 205
 206         assert(m);
 207         assert(device);
 208
 209         r = device_get_action(device, &action);
 210         if (r < 0) {
 211                 log_device_debug_errno(device, r, "Failed to get udev action, ignoring device: %m");
 212                 return 0;
 213         }
 214
 215         if (!IN_SET(action, DEVICE_ACTION_ADD, DEVICE_ACTION_CHANGE, DEVICE_ACTION_MOVE)) {
 216                 log_device_debug(device, "Ignoring udev %s event for device.", device_action_to_string(action));
 217                 return 0;
 218         }
 219
 220         r = sd_device_get_ifindex(device, &ifindex);
 221         if (r < 0) {
 222                 log_device_debug_errno(device, r, "Ignoring udev ADD event for device without ifindex or with invalid ifindex: %m");
 223                 return 0;
 224         }
 225
 226         r = device_is_renaming(device);
 227         if (r < 0) {
 228                 log_device_error_errno(device, r, "Failed to determine the device is renamed or not, ignoring '%s' uevent: %m",
 229                                        device_action_to_string(action));
 230                 return 0;
 231         }
 232         if (r > 0) {
 233                 log_device_debug(device, "Interface is under renaming, wait for the interface to be renamed: %m");
 234                 return 0;
 235         }
 236
 237         r = link_get(m, ifindex, &link);
 238         if (r < 0) {
 239                 if (r != -ENODEV)
 240                         log_debug_errno(r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
 241                 return 0;
 242         }
 243
 244         (void) link_initialized(link, device);
 245
 246         return 0;
 247 }
 248
 249 static int manager_connect_udev(Manager *m) {
 250         int r;
 251
 252         /* udev does not initialize devices inside containers,
 253          * so we rely on them being already initialized before
 254          * entering the container */
 255         if (detect_container() > 0)
 256                 return 0;
 257
 258         r = sd_device_monitor_new(&m->device_monitor);
 259         if (r < 0)
 260                 return log_error_errno(r, "Failed to initialize device monitor: %m");
 261
 262         r = sd_device_monitor_filter_add_match_subsystem_devtype(m->device_monitor, "net", NULL);
 263         if (r < 0)
 264                 return log_error_errno(r, "Could not add device monitor filter: %m");
 265
 266         r = sd_device_monitor_attach_event(m->device_monitor, m->event);
 267         if (r < 0)
 268                 return log_error_errno(r, "Failed to attach event to device monitor: %m");
 269
 270         r = sd_device_monitor_start(m->device_monitor, manager_udev_process_link, m);
 271         if (r < 0)
 272                 return log_error_errno(r, "Failed to start device monitor: %m");
 273
 274         return 0;
 275 }
 276
 277 int manager_rtnl_process_route(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 278         _cleanup_(route_freep) Route *tmp = NULL;
 279         Route *route = NULL;
 280         Manager *m = userdata;
 281         Link *link = NULL;
 282         uint32_t ifindex;
 283         uint16_t type;
 284         unsigned char table;
 285         int r;
 286
 287         assert(rtnl);
 288         assert(message);
 289         assert(m);
 290
 291         if (sd_netlink_message_is_error(message)) {
 292                 r = sd_netlink_message_get_errno(message);
 293                 if (r < 0)
 294                         log_message_warning_errno(message, r, "rtnl: failed to receive route message, ignoring");
 295
 296                 return 0;
 297         }
 298
 299         r = sd_netlink_message_get_type(message, &type);
 300         if (r < 0) {
 301                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
 302                 return 0;
 303         } else if (!IN_SET(type, RTM_NEWROUTE, RTM_DELROUTE)) {
 304                 log_warning("rtnl: received unexpected message type %u when processing route, ignoring.", type);
 305                 return 0;
 306         }
 307
 308         r = sd_netlink_message_read_u32(message, RTA_OIF, &ifindex);
 309         if (r == -ENODATA) {
 310                 log_debug("rtnl: received route message without ifindex, ignoring");
 311                 return 0;
 312         } else if (r < 0) {
 313                 log_warning_errno(r, "rtnl: could not get ifindex from route message, ignoring: %m");
 314                 return 0;
 315         } else if (ifindex <= 0) {
 316                 log_warning("rtnl: received route message with invalid ifindex %d, ignoring.", ifindex);
 317                 return 0;
 318         }
 319
 320         r = link_get(m, ifindex, &link);
 321         if (r < 0 || !link) {
 322                 /* when enumerating we might be out of sync, but we will
 323                  * get the route again, so just ignore it */
 324                 if (!m->enumerating)
 325                         log_warning("rtnl: received route message for link (%d) we do not know about, ignoring", ifindex);
 326                 return 0;
 327         }
 328
 329         r = route_new(&tmp);
 330         if (r < 0)
 331                 return log_oom();
 332
 333         r = sd_rtnl_message_route_get_family(message, &tmp->family);
 334         if (r < 0) {
 335                 log_link_warning(link, "rtnl: received route message without family, ignoring");
 336                 return 0;
 337         } else if (!IN_SET(tmp->family, AF_INET, AF_INET6)) {
 338                 log_link_debug(link, "rtnl: received route message with invalid family '%i', ignoring", tmp->family);
 339                 return 0;
 340         }
 341
 342         r = sd_rtnl_message_route_get_protocol(message, &tmp->protocol);
 343         if (r < 0) {
 344                 log_warning_errno(r, "rtnl: received route message without route protocol: %m");
 345                 return 0;
 346         }
 347
 348         switch (tmp->family) {
 349         case AF_INET:
 350                 r = sd_netlink_message_read_in_addr(message, RTA_DST, &tmp->dst.in);
 351                 if (r < 0 && r != -ENODATA) {
 352                         log_link_warning_errno(link, r, "rtnl: received route message without valid destination, ignoring: %m");
 353                         return 0;
 354                 }
 355
 356                 r = sd_netlink_message_read_in_addr(message, RTA_GATEWAY, &tmp->gw.in);
 357                 if (r < 0 && r != -ENODATA) {
 358                         log_link_warning_errno(link, r, "rtnl: received route message without valid gateway, ignoring: %m");
 359                         return 0;
 360                 }
 361
 362                 r = sd_netlink_message_read_in_addr(message, RTA_SRC, &tmp->src.in);
 363                 if (r < 0 && r != -ENODATA) {
 364                         log_link_warning_errno(link, r, "rtnl: received route message without valid source, ignoring: %m");
 365                         return 0;
 366                 }
 367
 368                 r = sd_netlink_message_read_in_addr(message, RTA_PREFSRC, &tmp->prefsrc.in);
 369                 if (r < 0 && r != -ENODATA) {
 370                         log_link_warning_errno(link, r, "rtnl: received route message without valid preferred source, ignoring: %m");
 371                         return 0;
 372                 }
 373
 374                 break;
 375
 376         case AF_INET6:
 377                 r = sd_netlink_message_read_in6_addr(message, RTA_DST, &tmp->dst.in6);
 378                 if (r < 0 && r != -ENODATA) {
 379                         log_link_warning_errno(link, r, "rtnl: received route message without valid destination, ignoring: %m");
 380                         return 0;
 381                 }
 382
 383                 r = sd_netlink_message_read_in6_addr(message, RTA_GATEWAY, &tmp->gw.in6);
 384                 if (r < 0 && r != -ENODATA) {
 385                         log_link_warning_errno(link, r, "rtnl: received route message without valid gateway, ignoring: %m");
 386                         return 0;
 387                 }
 388
 389                 r = sd_netlink_message_read_in6_addr(message, RTA_SRC, &tmp->src.in6);
 390                 if (r < 0 && r != -ENODATA) {
 391                         log_link_warning_errno(link, r, "rtnl: received route message without valid source, ignoring: %m");
 392                         return 0;
 393                 }
 394
 395                 r = sd_netlink_message_read_in6_addr(message, RTA_PREFSRC, &tmp->prefsrc.in6);
 396                 if (r < 0 && r != -ENODATA) {
 397                         log_link_warning_errno(link, r, "rtnl: received route message without valid preferred source, ignoring: %m");
 398                         return 0;
 399                 }
 400
 401                 break;
 402
 403         default:
 404                 assert_not_reached("Received route message with unsupported address family");
 405                 return 0;
 406         }
 407
 408         r = sd_rtnl_message_route_get_dst_prefixlen(message, &tmp->dst_prefixlen);
 409         if (r < 0) {
 410                 log_link_warning_errno(link, r, "rtnl: received route message with invalid destination prefixlen, ignoring: %m");
 411                 return 0;
 412         }
 413
 414         r = sd_rtnl_message_route_get_src_prefixlen(message, &tmp->src_prefixlen);
 415         if (r < 0) {
 416                 log_link_warning_errno(link, r, "rtnl: received route message with invalid source prefixlen, ignoring: %m");
 417                 return 0;
 418         }
 419
 420         r = sd_rtnl_message_route_get_scope(message, &tmp->scope);
 421         if (r < 0) {
 422                 log_link_warning_errno(link, r, "rtnl: received route message with invalid scope, ignoring: %m");
 423                 return 0;
 424         }
 425
 426         r = sd_rtnl_message_route_get_tos(message, &tmp->tos);
 427         if (r < 0) {
 428                 log_link_warning_errno(link, r, "rtnl: received route message with invalid tos, ignoring: %m");
 429                 return 0;
 430         }
 431
 432         r = sd_rtnl_message_route_get_type(message, &tmp->type);
 433         if (r < 0) {
 434                 log_link_warning_errno(link, r, "rtnl: received route message with invalid type, ignoring: %m");
 435                 return 0;
 436         }
 437
 438         r = sd_rtnl_message_route_get_table(message, &table);
 439         if (r < 0) {
 440                 log_link_warning_errno(link, r, "rtnl: received route message with invalid table, ignoring: %m");
 441                 return 0;
 442         }
 443         tmp->table = table;
 444
 445         r = sd_netlink_message_read_u32(message, RTA_PRIORITY, &tmp->priority);
 446         if (r < 0 && r != -ENODATA) {
 447                 log_link_warning_errno(link, r, "rtnl: received route message with invalid priority, ignoring: %m");
 448                 return 0;
 449         }
 450
 451         r = sd_netlink_message_enter_container(message, RTA_METRICS);
 452         if (r < 0 && r != -ENODATA) {
 453                 log_link_error_errno(link, r, "rtnl: Could not enter RTA_METRICS container: %m");
 454                 return 0;
 455         }
 456         if (r >= 0) {
 457                 r = sd_netlink_message_read_u32(message, RTAX_INITCWND, &tmp->initcwnd);
 458                 if (r < 0 && r != -ENODATA) {
 459                         log_link_warning_errno(link, r, "rtnl: received route message with invalid initcwnd, ignoring: %m");
 460                         return 0;
 461                 }
 462
 463                 r = sd_netlink_message_read_u32(message, RTAX_INITRWND, &tmp->initrwnd);
 464                 if (r < 0 && r != -ENODATA) {
 465                         log_link_warning_errno(link, r, "rtnl: received route message with invalid initrwnd, ignoring: %m");
 466                         return 0;
 467                 }
 468
 469                 r = sd_netlink_message_exit_container(message);
 470                 if (r < 0) {
 471                         log_link_error_errno(link, r, "rtnl: Could not exit from RTA_METRICS container: %m");
 472                         return 0;
 473                 }
 474         }
 475
 476         (void) route_get(link, tmp, &route);
 477
 478         if (DEBUG_LOGGING) {
 479                 _cleanup_free_ char *buf_dst = NULL, *buf_dst_prefixlen = NULL,
 480                         *buf_src = NULL, *buf_gw = NULL, *buf_prefsrc = NULL;
 481                 char buf_scope[ROUTE_SCOPE_STR_MAX], buf_table[ROUTE_TABLE_STR_MAX],
 482                         buf_protocol[ROUTE_PROTOCOL_STR_MAX];
 483
 484                 if (!in_addr_is_null(tmp->family, &tmp->dst)) {
 485                         (void) in_addr_to_string(tmp->family, &tmp->dst, &buf_dst);
 486                         (void) asprintf(&buf_dst_prefixlen, "/%u", tmp->dst_prefixlen);
 487                 }
 488                 if (!in_addr_is_null(tmp->family, &tmp->src))
 489                         (void) in_addr_to_string(tmp->family, &tmp->src, &buf_src);
 490                 if (!in_addr_is_null(tmp->family, &tmp->gw))
 491                         (void) in_addr_to_string(tmp->family, &tmp->gw, &buf_gw);
 492                 if (!in_addr_is_null(tmp->family, &tmp->prefsrc))
 493                         (void) in_addr_to_string(tmp->family, &tmp->prefsrc, &buf_prefsrc);
 494
 495                 log_link_debug(link,
 496                                "%s route: dst: %s%s, src: %s, gw: %s, prefsrc: %s, scope: %s, table: %s, proto: %s, type: %s",
 497                                type == RTM_DELROUTE ? "Forgetting" : route ? "Received remembered" : "Remembering",
 498                                strna(buf_dst), strempty(buf_dst_prefixlen),
 499                                strna(buf_src), strna(buf_gw), strna(buf_prefsrc),
 500                                format_route_scope(tmp->scope, buf_scope, sizeof buf_scope),
 501                                format_route_table(tmp->table, buf_table, sizeof buf_table),
 502                                format_route_protocol(tmp->protocol, buf_protocol, sizeof buf_protocol),
 503                                strna(route_type_to_string(tmp->type)));
 504         }
 505
 506         switch (type) {
 507         case RTM_NEWROUTE:
 508                 if (!route) {
 509                         /* A route appeared that we did not request */
 510                         r = route_add_foreign(link, tmp, &route);
 511                         if (r < 0) {
 512                                 log_link_warning_errno(link, r, "Failed to remember foreign route, ignoring: %m");
 513                                 return 0;
 514                         }
 515                 }
 516
 517                 break;
 518
 519         case RTM_DELROUTE:
 520                 route_free(route);
 521                 break;
 522
 523         default:
 524                 assert_not_reached("Received route message with invalid RTNL message type");
 525         }
 526
 527         return 1;
 528 }
 529
 530 static int manager_rtnl_process_neighbor_lladdr(sd_netlink_message *message, union lladdr_union *lladdr, size_t *size, char **str) {
 531         int r;
 532
 533         assert(message);
 534         assert(lladdr);
 535         assert(size);
 536         assert(str);
 537
 538         *str = NULL;
 539
 540         r = sd_netlink_message_read(message, NDA_LLADDR, sizeof(lladdr->ip.in6), &lladdr->ip.in6);
 541         if (r >= 0) {
 542                 *size = sizeof(lladdr->ip.in6);
 543                 if (in_addr_to_string(AF_INET6, &lladdr->ip, str) < 0)
 544                         log_warning_errno(r, "Could not print lower address: %m");
 545                 return r;
 546         }
 547
 548         r = sd_netlink_message_read(message, NDA_LLADDR, sizeof(lladdr->mac), &lladdr->mac);
 549         if (r >= 0) {
 550                 *size = sizeof(lladdr->mac);
 551                 *str = new(char, ETHER_ADDR_TO_STRING_MAX);
 552                 if (!*str) {
 553                         log_oom();
 554                         return r;
 555                 }
 556                 ether_addr_to_string(&lladdr->mac, *str);
 557                 return r;
 558         }
 559
 560         r = sd_netlink_message_read(message, NDA_LLADDR, sizeof(lladdr->ip.in), &lladdr->ip.in);
 561         if (r >= 0) {
 562                 *size = sizeof(lladdr->ip.in);
 563                 if (in_addr_to_string(AF_INET, &lladdr->ip, str) < 0)
 564                         log_warning_errno(r, "Could not print lower address: %m");
 565                 return r;
 566         }
 567
 568         return r;
 569 }
 570
 571 int manager_rtnl_process_neighbor(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 572         Manager *m = userdata;
 573         Link *link = NULL;
 574         Neighbor *neighbor = NULL;
 575         int ifindex, family, r;
 576         uint16_t type, state;
 577         union in_addr_union in_addr = IN_ADDR_NULL;
 578         _cleanup_free_ char *addr_str = NULL;
 579         union lladdr_union lladdr;
 580         size_t lladdr_size = 0;
 581         _cleanup_free_ char *lladdr_str = NULL;
 582
 583         assert(rtnl);
 584         assert(message);
 585         assert(m);
 586
 587         if (sd_netlink_message_is_error(message)) {
 588                 r = sd_netlink_message_get_errno(message);
 589                 if (r < 0)
 590                         log_message_warning_errno(message, r, "rtnl: failed to receive neighbor message, ignoring");
 591
 592                 return 0;
 593         }
 594
 595         r = sd_netlink_message_get_type(message, &type);
 596         if (r < 0) {
 597                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
 598                 return 0;
 599         } else if (!IN_SET(type, RTM_NEWNEIGH, RTM_DELNEIGH)) {
 600                 log_warning("rtnl: received unexpected message type %u when processing neighbor, ignoring.", type);
 601                 return 0;
 602         }
 603
 604         r = sd_rtnl_message_neigh_get_state(message, &state);
 605         if (r < 0) {
 606                 log_link_warning_errno(link, r, "rtnl: received neighbor message with invalid state, ignoring: %m");
 607                 return 0;
 608         } else if (!FLAGS_SET(state, NUD_PERMANENT)) {
 609                 log_debug("rtnl: received non-static neighbor, ignoring.");
 610                 return 0;
 611         }
 612
 613         r = sd_rtnl_message_neigh_get_ifindex(message, &ifindex);
 614         if (r < 0) {
 615                 log_warning_errno(r, "rtnl: could not get ifindex from message, ignoring: %m");
 616                 return 0;
 617         } else if (ifindex <= 0) {
 618                 log_warning("rtnl: received neighbor message with invalid ifindex %d, ignoring.", ifindex);
 619                 return 0;
 620         }
 621
 622         r = link_get(m, ifindex, &link);
 623         if (r < 0 || !link) {
 624                 /* when enumerating we might be out of sync, but we will get the neighbor again, so just
 625                  * ignore it */
 626                 if (!m->enumerating)
 627                         log_warning("rtnl: received neighbor for link '%d' we don't know about, ignoring.", ifindex);
 628                 return 0;
 629         }
 630
 631         r = sd_rtnl_message_neigh_get_family(message, &family);
 632         if (r < 0) {
 633                 log_link_warning(link, "rtnl: received neighbor message without family, ignoring.");
 634                 return 0;
 635         } else if (!IN_SET(family, AF_INET, AF_INET6)) {
 636                 log_link_debug(link, "rtnl: received neighbor message with invalid family '%i', ignoring.", family);
 637                 return 0;
 638         }
 639
 640         switch (family) {
 641         case AF_INET:
 642                 r = sd_netlink_message_read_in_addr(message, NDA_DST, &in_addr.in);
 643                 if (r < 0) {
 644                         log_link_warning_errno(link, r, "rtnl: received neighbor message without valid address, ignoring: %m");
 645                         return 0;
 646                 }
 647
 648                 break;
 649
 650         case AF_INET6:
 651                 r = sd_netlink_message_read_in6_addr(message, NDA_DST, &in_addr.in6);
 652                 if (r < 0) {
 653                         log_link_warning_errno(link, r, "rtnl: received neighbor message without valid address, ignoring: %m");
 654                         return 0;
 655                 }
 656
 657                 break;
 658
 659         default:
 660                 assert_not_reached("Received unsupported address family");
 661         }
 662
 663         if (in_addr_to_string(family, &in_addr, &addr_str) < 0)
 664                 log_link_warning_errno(link, r, "Could not print address: %m");
 665
 666         r = manager_rtnl_process_neighbor_lladdr(message, &lladdr, &lladdr_size, &lladdr_str);
 667         if (r < 0) {
 668                 log_link_warning_errno(link, r, "rtnl: received neighbor message with invalid lladdr, ignoring: %m");
 669                 return 0;
 670         }
 671
 672         (void) neighbor_get(link, family, &in_addr, &lladdr, lladdr_size, &neighbor);
 673
 674         switch (type) {
 675         case RTM_NEWNEIGH:
 676                 if (neighbor)
 677                         log_link_debug(link, "Remembering neighbor: %s->%s",
 678                                        strnull(addr_str), strnull(lladdr_str));
 679                 else {
 680                         /* A neighbor appeared that we did not request */
 681                         r = neighbor_add_foreign(link, family, &in_addr, &lladdr, lladdr_size, &neighbor);
 682                         if (r < 0) {
 683                                 log_link_warning_errno(link, r, "Failed to remember foreign neighbor %s->%s, ignoring: %m",
 684                                                        strnull(addr_str), strnull(lladdr_str));
 685                                 return 0;
 686                         } else
 687                                 log_link_debug(link, "Remembering foreign neighbor: %s->%s",
 688                                                strnull(addr_str), strnull(lladdr_str));
 689                 }
 690
 691                 break;
 692
 693         case RTM_DELNEIGH:
 694                 if (neighbor) {
 695                         log_link_debug(link, "Forgetting neighbor: %s->%s",
 696                                        strnull(addr_str), strnull(lladdr_str));
 697                         (void) neighbor_free(neighbor);
 698                 } else
 699                         log_link_debug(link, "Kernel removed a neighbor we don't remember: %s->%s, ignoring.",
 700                                        strnull(addr_str), strnull(lladdr_str));
 701
 702                 break;
 703
 704         default:
 705                 assert_not_reached("Received invalid RTNL message type");
 706         }
 707
 708         return 1;
 709 }
 710
 711 int manager_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 712         _cleanup_free_ char *buf = NULL;
 713         Manager *m = userdata;
 714         Link *link = NULL;
 715         uint16_t type;
 716         unsigned char flags, prefixlen, scope;
 717         union in_addr_union in_addr = IN_ADDR_NULL;
 718         struct ifa_cacheinfo cinfo;
 719         Address *address = NULL;
 720         char valid_buf[FORMAT_TIMESPAN_MAX];
 721         const char *valid_str = NULL;
 722         int ifindex, family, r;
 723
 724         assert(rtnl);
 725         assert(message);
 726         assert(m);
 727
 728         if (sd_netlink_message_is_error(message)) {
 729                 r = sd_netlink_message_get_errno(message);
 730                 if (r < 0)
 731                         log_message_warning_errno(message, r, "rtnl: failed to receive address message, ignoring");
 732
 733                 return 0;
 734         }
 735
 736         r = sd_netlink_message_get_type(message, &type);
 737         if (r < 0) {
 738                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
 739                 return 0;
 740         } else if (!IN_SET(type, RTM_NEWADDR, RTM_DELADDR)) {
 741                 log_warning("rtnl: received unexpected message type %u when processing address, ignoring.", type);
 742                 return 0;
 743         }
 744
 745         r = sd_rtnl_message_addr_get_ifindex(message, &ifindex);
 746         if (r < 0) {
 747                 log_warning_errno(r, "rtnl: could not get ifindex from message, ignoring: %m");
 748                 return 0;
 749         } else if (ifindex <= 0) {
 750                 log_warning("rtnl: received address message with invalid ifindex %d, ignoring.", ifindex);
 751                 return 0;
 752         }
 753
 754         r = link_get(m, ifindex, &link);
 755         if (r < 0 || !link) {
 756                 /* when enumerating we might be out of sync, but we will get the address again, so just
 757                  * ignore it */
 758                 if (!m->enumerating)
 759                         log_warning("rtnl: received address for link '%d' we don't know about, ignoring.", ifindex);
 760                 return 0;
 761         }
 762
 763         r = sd_rtnl_message_addr_get_family(message, &family);
 764         if (r < 0) {
 765                 log_link_warning(link, "rtnl: received address message without family, ignoring.");
 766                 return 0;
 767         } else if (!IN_SET(family, AF_INET, AF_INET6)) {
 768                 log_link_debug(link, "rtnl: received address message with invalid family '%i', ignoring.", family);
 769                 return 0;
 770         }
 771
 772         r = sd_rtnl_message_addr_get_prefixlen(message, &prefixlen);
 773         if (r < 0) {
 774                 log_link_warning_errno(link, r, "rtnl: received address message with invalid prefixlen, ignoring: %m");
 775                 return 0;
 776         }
 777
 778         r = sd_rtnl_message_addr_get_scope(message, &scope);
 779         if (r < 0) {
 780                 log_link_warning_errno(link, r, "rtnl: received address message with invalid scope, ignoring: %m");
 781                 return 0;
 782         }
 783
 784         r = sd_rtnl_message_addr_get_flags(message, &flags);
 785         if (r < 0) {
 786                 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
 787                 return 0;
 788         }
 789
 790         switch (family) {
 791         case AF_INET:
 792                 r = sd_netlink_message_read_in_addr(message, IFA_LOCAL, &in_addr.in);
 793                 if (r < 0) {
 794                         log_link_warning_errno(link, r, "rtnl: received address message without valid address, ignoring: %m");
 795                         return 0;
 796                 }
 797
 798                 break;
 799
 800         case AF_INET6:
 801                 r = sd_netlink_message_read_in6_addr(message, IFA_ADDRESS, &in_addr.in6);
 802                 if (r < 0) {
 803                         log_link_warning_errno(link, r, "rtnl: received address message without valid address, ignoring: %m");
 804                         return 0;
 805                 }
 806
 807                 break;
 808
 809         default:
 810                 assert_not_reached("Received unsupported address family");
 811         }
 812
 813         r = in_addr_to_string(family, &in_addr, &buf);
 814         if (r < 0)
 815                 log_link_warning_errno(link, r, "Could not print address: %m");
 816
 817         r = sd_netlink_message_read_cache_info(message, IFA_CACHEINFO, &cinfo);
 818         if (r < 0 && r != -ENODATA) {
 819                 log_link_warning_errno(link, r, "rtnl: cannot get IFA_CACHEINFO attribute, ignoring: %m");
 820                 return 0;
 821         } else if (r >= 0 && cinfo.ifa_valid != CACHE_INFO_INFINITY_LIFE_TIME)
 822                 valid_str = format_timespan(valid_buf, FORMAT_TIMESPAN_MAX,
 823                                             cinfo.ifa_valid * USEC_PER_SEC,
 824                                             USEC_PER_SEC);
 825
 826         (void) address_get(link, family, &in_addr, prefixlen, &address);
 827
 828         switch (type) {
 829         case RTM_NEWADDR:
 830                 if (address)
 831                         log_link_debug(link, "Remembering updated address: %s/%u (valid %s%s)",
 832                                        strnull(buf), prefixlen,
 833                                        valid_str ? "for " : "forever", strempty(valid_str));
 834                 else {
 835                         /* An address appeared that we did not request */
 836                         r = address_add_foreign(link, family, &in_addr, prefixlen, &address);
 837                         if (r < 0) {
 838                                 log_link_warning_errno(link, r, "Failed to remember foreign address %s/%u, ignoring: %m",
 839                                                        strnull(buf), prefixlen);
 840                                 return 0;
 841                         } else
 842                                 log_link_debug(link, "Remembering foreign address: %s/%u (valid %s%s)",
 843                                                strnull(buf), prefixlen,
 844                                                valid_str ? "for " : "forever", strempty(valid_str));
 845                 }
 846
 847                 /* address_update() logs internally, so we don't need to. */
 848                 (void) address_update(address, flags, scope, &cinfo);
 849
 850                 break;
 851
 852         case RTM_DELADDR:
 853                 if (address) {
 854                         log_link_debug(link, "Forgetting address: %s/%u (valid %s%s)",
 855                                        strnull(buf), prefixlen,
 856                                        valid_str ? "for " : "forever", strempty(valid_str));
 857                         (void) address_drop(address);
 858                 } else
 859                         log_link_debug(link, "Kernel removed an address we don't remember: %s/%u (valid %s%s), ignoring.",
 860                                        strnull(buf), prefixlen,
 861                                        valid_str ? "for " : "forever", strempty(valid_str));
 862
 863                 break;
 864
 865         default:
 866                 assert_not_reached("Received invalid RTNL message type");
 867         }
 868
 869         return 1;
 870 }
 871
 872 static int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 873         Manager *m = userdata;
 874         Link *link = NULL;
 875         NetDev *netdev = NULL;
 876         uint16_t type;
 877         const char *name;
 878         int r, ifindex;
 879
 880         assert(rtnl);
 881         assert(message);
 882         assert(m);
 883
 884         if (sd_netlink_message_is_error(message)) {
 885                 r = sd_netlink_message_get_errno(message);
 886                 if (r < 0)
 887                         log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
 888
 889                 return 0;
 890         }
 891
 892         r = sd_netlink_message_get_type(message, &type);
 893         if (r < 0) {
 894                 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
 895                 return 0;
 896         } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
 897                 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
 898                 return 0;
 899         }
 900
 901         r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
 902         if (r < 0) {
 903                 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
 904                 return 0;
 905         } else if (ifindex <= 0) {
 906                 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
 907                 return 0;
 908         }
 909
 910         r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
 911         if (r < 0) {
 912                 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
 913                 return 0;
 914         }
 915
 916         (void) link_get(m, ifindex, &link);
 917         (void) netdev_get(m, name, &netdev);
 918
 919         switch (type) {
 920         case RTM_NEWLINK:
 921                 if (!link) {
 922                         /* link is new, so add it */
 923                         r = link_add(m, message, &link);
 924                         if (r < 0) {
 925                                 log_warning_errno(r, "Could not process new link message, ignoring: %m");
 926                                 return 0;
 927                         }
 928                 }
 929
 930                 if (netdev) {
 931                         /* netdev exists, so make sure the ifindex matches */
 932                         r = netdev_set_ifindex(netdev, message);
 933                         if (r < 0) {
 934                                 log_warning_errno(r, "Could not process new link message for netdev, ignoring: %m");
 935                                 return 0;
 936                         }
 937                 }
 938
 939                 r = link_update(link, message);
 940                 if (r < 0) {
 941                         log_warning_errno(r, "Could not process link message, ignoring: %m");
 942                         return 0;
 943                 }
 944
 945                 break;
 946
 947         case RTM_DELLINK:
 948                 link_drop(link);
 949                 netdev_drop(netdev);
 950
 951                 break;
 952
 953         default:
 954                 assert_not_reached("Received link message with invalid RTNL message type.");
 955         }
 956
 957         return 1;
 958 }
 959
 960 int manager_rtnl_process_rule(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 961         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *tmp = NULL;
 962         _cleanup_free_ char *from = NULL, *to = NULL;
 963         RoutingPolicyRule *rule = NULL;
 964         const char *iif = NULL, *oif = NULL;
 965         Manager *m = userdata;
 966         unsigned flags;
 967         uint16_t type;
 968         int r;
 969
 970         assert(rtnl);
 971         assert(message);
 972         assert(m);
 973
 974         if (sd_netlink_message_is_error(message)) {
 975                 r = sd_netlink_message_get_errno(message);
 976                 if (r < 0)
 977                         log_message_warning_errno(message, r, "rtnl: failed to receive rule message, ignoring");
 978
 979                 return 0;
 980         }
 981
 982         r = sd_netlink_message_get_type(message, &type);
 983         if (r < 0) {
 984                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
 985                 return 0;
 986         } else if (!IN_SET(type, RTM_NEWRULE, RTM_DELRULE)) {
 987                 log_warning("rtnl: received unexpected message type %u when processing rule, ignoring.", type);
 988                 return 0;
 989         }
 990
 991         r = routing_policy_rule_new(&tmp);
 992         if (r < 0) {
 993                 log_oom();
 994                 return 0;
 995         }
 996
 997         r = sd_rtnl_message_get_family(message, &tmp->family);
 998         if (r < 0) {
 999                 log_warning_errno(r, "rtnl: could not get rule family, ignoring: %m");
1000                 return 0;
1001         } else if (!IN_SET(tmp->family, AF_INET, AF_INET6)) {
1002                 log_debug("rtnl: received rule message with invalid family %d, ignoring.", tmp->family);
1003                 return 0;
1004         }
1005
1006         switch (tmp->family) {
1007         case AF_INET:
1008                 r = sd_netlink_message_read_in_addr(message, FRA_SRC, &tmp->from.in);
1009                 if (r < 0 && r != -ENODATA) {
1010                         log_warning_errno(r, "rtnl: could not get FRA_SRC attribute, ignoring: %m");
1011                         return 0;
1012                 } else if (r >= 0) {
1013                         r = sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(message, &tmp->from_prefixlen);
1014                         if (r < 0) {
1015                                 log_warning_errno(r, "rtnl: received rule message without valid source prefix length, ignoring: %m");
1016                                 return 0;
1017                         }
1018                 }
1019
1020                 r = sd_netlink_message_read_in_addr(message, FRA_DST, &tmp->to.in);
1021                 if (r < 0 && r != -ENODATA) {
1022                         log_warning_errno(r, "rtnl: could not get FRA_DST attribute, ignoring: %m");
1023                         return 0;
1024                 } else if (r >= 0) {
1025                         r = sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(message, &tmp->to_prefixlen);
1026                         if (r < 0) {
1027                                 log_warning_errno(r, "rtnl: received rule message without valid destination prefix length, ignoring: %m");
1028                                 return 0;
1029                         }
1030                 }
1031
1032                 break;
1033
1034         case AF_INET6:
1035                 r = sd_netlink_message_read_in6_addr(message, FRA_SRC, &tmp->from.in6);
1036                 if (r < 0 && r != -ENODATA) {
1037                         log_warning_errno(r, "rtnl: could not get FRA_SRC attribute, ignoring: %m");
1038                         return 0;
1039                 } else if (r >= 0) {
1040                         r = sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(message, &tmp->from_prefixlen);
1041                         if (r < 0) {
1042                                 log_warning_errno(r, "rtnl: received rule message without valid source prefix length, ignoring: %m");
1043                                 return 0;
1044                         }
1045                 }
1046
1047                 r = sd_netlink_message_read_in6_addr(message, FRA_DST, &tmp->to.in6);
1048                 if (r < 0 && r != -ENODATA) {
1049                         log_warning_errno(r, "rtnl: could not get FRA_DST attribute, ignoring: %m");
1050                         return 0;
1051                 } else if (r >= 0) {
1052                         r = sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(message, &tmp->to_prefixlen);
1053                         if (r < 0) {
1054                                 log_warning_errno(r, "rtnl: received rule message without valid destination prefix length, ignoring: %m");
1055                                 return 0;
1056                         }
1057                 }
1058
1059                 break;
1060
1061         default:
1062                 assert_not_reached("Received rule message with unsupported address family");
1063         }
1064
1065         if (tmp->from_prefixlen == 0 && tmp->to_prefixlen == 0)
1066                 return 0;
1067
1068         r = sd_rtnl_message_routing_policy_rule_get_flags(message, &flags);
1069         if (r < 0) {
1070                 log_warning_errno(r, "rtnl: received rule message without valid flag, ignoring: %m");
1071                 return 0;
1072         }
1073         tmp->invert_rule = flags & FIB_RULE_INVERT;
1074
1075         r = sd_netlink_message_read_u32(message, FRA_FWMARK, &tmp->fwmark);
1076         if (r < 0 && r != -ENODATA) {
1077                 log_warning_errno(r, "rtnl: could not get FRA_FWMARK attribute, ignoring: %m");
1078                 return 0;
1079         }
1080
1081         r = sd_netlink_message_read_u32(message, FRA_FWMASK, &tmp->fwmask);
1082         if (r < 0 && r != -ENODATA) {
1083                 log_warning_errno(r, "rtnl: could not get FRA_FWMASK attribute, ignoring: %m");
1084                 return 0;
1085         }
1086
1087         r = sd_netlink_message_read_u32(message, FRA_PRIORITY, &tmp->priority);
1088         if (r < 0 && r != -ENODATA) {
1089                 log_warning_errno(r, "rtnl: could not get FRA_PRIORITY attribute, ignoring: %m");
1090                 return 0;
1091         }
1092
1093         r = sd_netlink_message_read_u32(message, FRA_TABLE, &tmp->table);
1094         if (r < 0 && r != -ENODATA) {
1095                 log_warning_errno(r, "rtnl: could not get FRA_TABLE attribute, ignoring: %m");
1096                 return 0;
1097         }
1098
1099         r = sd_rtnl_message_routing_policy_rule_get_tos(message, &tmp->tos);
1100         if (r < 0 && r != -ENODATA) {
1101                 log_warning_errno(r, "rtnl: could not get ip rule TOS, ignoring: %m");
1102                 return 0;
1103         }
1104
1105         r = sd_netlink_message_read_string(message, FRA_IIFNAME, &iif);
1106         if (r < 0 && r != -ENODATA) {
1107                 log_warning_errno(r, "rtnl: could not get FRA_IIFNAME attribute, ignoring: %m");
1108                 return 0;
1109         }
1110         r = free_and_strdup(&tmp->iif, iif);
1111         if (r < 0)
1112                 return log_oom();
1113
1114         r = sd_netlink_message_read_string(message, FRA_OIFNAME, &oif);
1115         if (r < 0 && r != -ENODATA) {
1116                 log_warning_errno(r, "rtnl: could not get FRA_OIFNAME attribute, ignoring: %m");
1117                 return 0;
1118         }
1119         r = free_and_strdup(&tmp->oif, oif);
1120         if (r < 0)
1121                 return log_oom();
1122
1123         r = sd_netlink_message_read_u8(message, FRA_IP_PROTO, &tmp->protocol);
1124         if (r < 0 && r != -ENODATA) {
1125                 log_warning_errno(r, "rtnl: could not get FRA_IP_PROTO attribute, ignoring: %m");
1126                 return 0;
1127         }
1128
1129         r = sd_netlink_message_read(message, FRA_SPORT_RANGE, sizeof(tmp->sport), &tmp->sport);
1130         if (r < 0 && r != -ENODATA) {
1131                 log_warning_errno(r, "rtnl: could not get FRA_SPORT_RANGE attribute, ignoring: %m");
1132                 return 0;
1133         }
1134
1135         r = sd_netlink_message_read(message, FRA_DPORT_RANGE, sizeof(tmp->dport), &tmp->dport);
1136         if (r < 0 && r != -ENODATA) {
1137                 log_warning_errno(r, "rtnl: could not get FRA_DPORT_RANGE attribute, ignoring: %m");
1138                 return 0;
1139         }
1140
1141         r = sd_netlink_message_read(message, FRA_UID_RANGE, sizeof(tmp->uid_range), &tmp->uid_range);
1142         if (r < 0 && r != -ENODATA) {
1143                 log_warning_errno(r, "rtnl: could not get FRA_UID_RANGE attribute, ignoring: %m");
1144                 return 0;
1145         }
1146
1147         (void) routing_policy_rule_get(m, tmp, &rule);
1148
1149         if (DEBUG_LOGGING) {
1150                 (void) in_addr_to_string(tmp->family, &tmp->from, &from);
1151                 (void) in_addr_to_string(tmp->family, &tmp->to, &to);
1152         }
1153
1154         switch (type) {
1155         case RTM_NEWRULE:
1156                 if (!rule) {
1157                         log_debug("Remembering foreign routing policy rule: %s/%u -> %s/%u, iif: %s, oif: %s, table: %u",
1158                                   from, tmp->from_prefixlen, to, tmp->to_prefixlen, strna(tmp->iif), strna(tmp->oif), tmp->table);
1159                         r = routing_policy_rule_add_foreign(m, tmp, &rule);
1160                         if (r < 0) {
1161                                 log_warning_errno(r, "Could not remember foreign rule, ignoring: %m");
1162                                 return 0;
1163                         }
1164                 }
1165                 break;
1166         case RTM_DELRULE:
1167                 log_debug("Forgetting routing policy rule: %s/%u -> %s/%u, iif: %s, oif: %s, table: %u",
1168                           from, tmp->from_prefixlen, to, tmp->to_prefixlen, strna(tmp->iif), strna(tmp->oif), tmp->table);
1169                 routing_policy_rule_free(rule);
1170
1171                 break;
1172
1173         default:
1174                 assert_not_reached("Received invalid RTNL message type");
1175         }
1176
1177         return 1;
1178 }
1179
1180 int manager_rtnl_process_nexthop(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
1181         _cleanup_(nexthop_freep) NextHop *tmp = NULL;
1182         _cleanup_free_ char *gateway = NULL;
1183         NextHop *nexthop = NULL;
1184         Manager *m = userdata;
1185         Link *link = NULL;
1186         uint16_t type;
1187         int r;
1188
1189         assert(rtnl);
1190         assert(message);
1191         assert(m);
1192
1193         if (sd_netlink_message_is_error(message)) {
1194                 r = sd_netlink_message_get_errno(message);
1195                 if (r < 0)
1196                         log_message_warning_errno(message, r, "rtnl: failed to receive rule message, ignoring");
1197
1198                 return 0;
1199         }
1200
1201         r = sd_netlink_message_get_type(message, &type);
1202         if (r < 0) {
1203                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
1204                 return 0;
1205         } else if (!IN_SET(type, RTM_NEWNEXTHOP, RTM_DELNEXTHOP)) {
1206                 log_warning("rtnl: received unexpected message type %u when processing nexthop, ignoring.", type);
1207                 return 0;
1208         }
1209
1210         r = nexthop_new(&tmp);
1211         if (r < 0)
1212                 return log_oom();
1213
1214         r = sd_rtnl_message_get_family(message, &tmp->family);
1215         if (r < 0) {
1216                 log_warning_errno(r, "rtnl: could not get nexthop family, ignoring: %m");
1217                 return 0;
1218         } else if (!IN_SET(tmp->family, AF_INET, AF_INET6)) {
1219                 log_debug("rtnl: received nexthop message with invalid family %d, ignoring.", tmp->family);
1220                 return 0;
1221         }
1222
1223         switch (tmp->family) {
1224         case AF_INET:
1225                 r = sd_netlink_message_read_in_addr(message, NHA_GATEWAY, &tmp->gw.in);
1226                 if (r < 0 && r != -ENODATA) {
1227                         log_warning_errno(r, "rtnl: could not get NHA_GATEWAY attribute, ignoring: %m");
1228                         return 0;
1229                 }
1230                 break;
1231
1232         case AF_INET6:
1233                 r = sd_netlink_message_read_in6_addr(message, NHA_GATEWAY, &tmp->gw.in6);
1234                 if (r < 0 && r != -ENODATA) {
1235                         log_warning_errno(r, "rtnl: could not get NHA_GATEWAY attribute, ignoring: %m");
1236                         return 0;
1237                 }
1238                 break;
1239
1240         default:
1241                 assert_not_reached("Received rule message with unsupported address family");
1242         }
1243
1244         r = sd_netlink_message_read_u32(message, NHA_ID, &tmp->id);
1245         if (r < 0 && r != -ENODATA) {
1246                 log_warning_errno(r, "rtnl: could not get NHA_ID attribute, ignoring: %m");
1247                 return 0;
1248         }
1249
1250         r = sd_netlink_message_read_u32(message, NHA_OIF, &tmp->oif);
1251         if (r < 0 && r != -ENODATA) {
1252                 log_warning_errno(r, "rtnl: could not get NHA_OIF attribute, ignoring: %m");
1253                 return 0;
1254         }
1255
1256         r = link_get(m, tmp->oif, &link);
1257         if (r < 0 || !link) {
1258                 if (!m->enumerating)
1259                         log_warning("rtnl: received nexthop message for link (%d) we do not know about, ignoring", tmp->oif);
1260                 return 0;
1261         }
1262
1263         (void) nexthop_get(link, tmp, &nexthop);
1264
1265         if (DEBUG_LOGGING)
1266                 (void) in_addr_to_string(tmp->family, &tmp->gw, &gateway);
1267
1268         switch (type) {
1269         case RTM_NEWNEXTHOP:
1270                 if (!nexthop) {
1271                         log_debug("Remembering foreign nexthop: %s, oif: %d, id: %d", gateway, tmp->oif, tmp->id);
1272                         r = nexthop_add_foreign(link, tmp, &nexthop);
1273                         if (r < 0) {
1274                                 log_warning_errno(r, "Could not remember foreign nexthop, ignoring: %m");
1275                                 return 0;
1276                         }
1277                 }
1278                 break;
1279         case RTM_DELNEXTHOP:
1280                 log_debug("Forgetting foreign nexthop: %s, oif: %d, id: %d", gateway, tmp->oif, tmp->id);
1281                 nexthop_free(nexthop);
1282
1283                 break;
1284
1285         default:
1286                 assert_not_reached("Received invalid RTNL message type");
1287         }
1288
1289         return 1;
1290 }
1291
1292 static int systemd_netlink_fd(void) {
1293         int n, fd, rtnl_fd = -EINVAL;
1294
1295         n = sd_listen_fds(true);
1296         if (n <= 0)
1297                 return -EINVAL;
1298
1299         for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++) {
1300                 if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) {
1301                         if (rtnl_fd >= 0)
1302                                 return -EINVAL;
1303
1304                         rtnl_fd = fd;
1305                 }
1306         }
1307
1308         return rtnl_fd;
1309 }
1310
1311 static int manager_connect_genl(Manager *m) {
1312         int r;
1313
1314         assert(m);
1315
1316         r = sd_genl_socket_open(&m->genl);
1317         if (r < 0)
1318                 return r;
1319
1320         r = sd_netlink_inc_rcvbuf(m->genl, RCVBUF_SIZE);
1321         if (r < 0)
1322                 return r;
1323
1324         r = sd_netlink_attach_event(m->genl, m->event, 0);
1325         if (r < 0)
1326                 return r;
1327
1328         return 0;
1329 }
1330
1331 static int manager_connect_rtnl(Manager *m) {
1332         int fd, r;
1333
1334         assert(m);
1335
1336         fd = systemd_netlink_fd();
1337         if (fd < 0)
1338                 r = sd_netlink_open(&m->rtnl);
1339         else
1340                 r = sd_netlink_open_fd(&m->rtnl, fd);
1341         if (r < 0)
1342                 return r;
1343
1344         r = sd_netlink_inc_rcvbuf(m->rtnl, RCVBUF_SIZE);
1345         if (r < 0)
1346                 return r;
1347
1348         r = sd_netlink_attach_event(m->rtnl, m->event, 0);
1349         if (r < 0)
1350                 return r;
1351
1352         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link");
1353         if (r < 0)
1354                 return r;
1355
1356         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link");
1357         if (r < 0)
1358                 return r;
1359
1360         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address");
1361         if (r < 0)
1362                 return r;
1363
1364         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address");
1365         if (r < 0)
1366                 return r;
1367
1368         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWNEIGH, &manager_rtnl_process_neighbor, NULL, m, "network-rtnl_process_neighbor");
1369         if (r < 0)
1370                 return r;
1371
1372         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELNEIGH, &manager_rtnl_process_neighbor, NULL, m, "network-rtnl_process_neighbor");
1373         if (r < 0)
1374                 return r;
1375
1376         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route");
1377         if (r < 0)
1378                 return r;
1379
1380         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route");
1381         if (r < 0)
1382                 return r;
1383
1384         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule");
1385         if (r < 0)
1386                 return r;
1387
1388         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule");
1389         if (r < 0)
1390                 return r;
1391
1392         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWNEXTHOP, &manager_rtnl_process_nexthop, NULL, m, "network-rtnl_process_nexthop");
1393         if (r < 0)
1394                 return r;
1395
1396         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELNEXTHOP, &manager_rtnl_process_nexthop, NULL, m, "network-rtnl_process_nexthop");
1397         if (r < 0)
1398                 return r;
1399
1400         return 0;
1401 }
1402
1403 static int ordered_set_put_in_addr_data(OrderedSet *s, const struct in_addr_data *address) {
1404         char *p;
1405         int r;
1406
1407         assert(s);
1408         assert(address);
1409
1410         r = in_addr_to_string(address->family, &address->address, &p);
1411         if (r < 0)
1412                 return r;
1413
1414         r = ordered_set_consume(s, p);
1415         if (r == -EEXIST)
1416                 return 0;
1417
1418         return r;
1419 }
1420
1421 static int ordered_set_put_in_addr_datav(OrderedSet *s, const struct in_addr_data *addresses, unsigned n) {
1422         int r, c = 0;
1423         unsigned i;
1424
1425         assert(s);
1426         assert(addresses || n == 0);
1427
1428         for (i = 0; i < n; i++) {
1429                 r = ordered_set_put_in_addr_data(s, addresses+i);
1430                 if (r < 0)
1431                         return r;
1432
1433                 c += r;
1434         }
1435
1436         return c;
1437 }
1438
1439 static int ordered_set_put_in4_addr(OrderedSet *s, const struct in_addr *address) {
1440         char *p;
1441         int r;
1442
1443         assert(s);
1444         assert(address);
1445
1446         r = in_addr_to_string(AF_INET, (const union in_addr_union*) address, &p);
1447         if (r < 0)
1448                 return r;
1449
1450         r = ordered_set_consume(s, p);
1451         if (r == -EEXIST)
1452                 return 0;
1453
1454         return r;
1455 }
1456
1457 static int ordered_set_put_in4_addrv(OrderedSet *s,
1458                                      const struct in_addr *addresses,
1459                                      size_t n,
1460                                      bool (*predicate)(const struct in_addr *addr)) {
1461         int r, c = 0;
1462         size_t i;
1463
1464         assert(s);
1465         assert(n == 0 || addresses);
1466
1467         for (i = 0; i < n; i++) {
1468                 if (predicate && !predicate(&addresses[i]))
1469                         continue;
1470                 r = ordered_set_put_in4_addr(s, addresses+i);
1471                 if (r < 0)
1472                         return r;
1473
1474                 c += r;
1475         }
1476
1477         return c;
1478 }
1479
1480 static int manager_save(Manager *m) {
1481         _cleanup_ordered_set_free_free_ OrderedSet *dns = NULL, *ntp = NULL, *sip = NULL, *search_domains = NULL, *route_domains = NULL;
1482         const char *operstate_str, *carrier_state_str, *address_state_str;
1483         LinkOperationalState operstate = LINK_OPERSTATE_OFF;
1484         LinkCarrierState carrier_state = LINK_CARRIER_STATE_OFF;
1485         LinkAddressState address_state = LINK_ADDRESS_STATE_OFF;
1486         _cleanup_free_ char *temp_path = NULL;
1487         _cleanup_strv_free_ char **p = NULL;
1488         _cleanup_fclose_ FILE *f = NULL;
1489         Link *link;
1490         Iterator i;
1491         int r;
1492
1493         assert(m);
1494         assert(m->state_file);
1495
1496         /* We add all NTP and DNS server to a set, to filter out duplicates */
1497         dns = ordered_set_new(&string_hash_ops);
1498         if (!dns)
1499                 return -ENOMEM;
1500
1501         ntp = ordered_set_new(&string_hash_ops);
1502         if (!ntp)
1503                 return -ENOMEM;
1504
1505        sip = ordered_set_new(&string_hash_ops);
1506        if (!sip)
1507                 return -ENOMEM;
1508
1509         search_domains = ordered_set_new(&dns_name_hash_ops);
1510         if (!search_domains)
1511                 return -ENOMEM;
1512
1513         route_domains = ordered_set_new(&dns_name_hash_ops);
1514         if (!route_domains)
1515                 return -ENOMEM;
1516
1517         HASHMAP_FOREACH(link, m->links, i) {
1518                 if (link->flags & IFF_LOOPBACK)
1519                         continue;
1520
1521                 if (link->operstate > operstate)
1522                         operstate = link->operstate;
1523
1524                 if (link->carrier_state > carrier_state)
1525                         carrier_state = link->carrier_state;
1526
1527                 if (link->address_state > address_state)
1528                         address_state = link->address_state;
1529
1530                 if (!link->network)
1531                         continue;
1532
1533                 /* First add the static configured entries */
1534                 r = ordered_set_put_in_addr_datav(dns, link->network->dns, link->network->n_dns);
1535                 if (r < 0)
1536                         return r;
1537
1538                 r = ordered_set_put_strdupv(ntp, link->ntp ?: link->network->ntp);
1539                 if (r < 0)
1540                         return r;
1541
1542                 r = ordered_set_put_string_set(search_domains, link->search_domains ?: link->network->search_domains);
1543                 if (r < 0)
1544                         return r;
1545
1546                 r = ordered_set_put_string_set(route_domains, link->route_domains ?: link->network->route_domains);
1547                 if (r < 0)
1548                         return r;
1549
1550                 if (!link->dhcp_lease)
1551                         continue;
1552
1553                 /* Secondly, add the entries acquired via DHCP */
1554                 if (link->network->dhcp_use_dns) {
1555                         const struct in_addr *addresses;
1556
1557                         r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
1558                         if (r > 0) {
1559                                 r = ordered_set_put_in4_addrv(dns, addresses, r, in4_addr_is_non_local);
1560                                 if (r < 0)
1561                                         return r;
1562                         } else if (r < 0 && r != -ENODATA)
1563                                 return r;
1564                 }
1565
1566                 if (link->network->dhcp_use_ntp) {
1567                         const struct in_addr *addresses;
1568
1569                         r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
1570                         if (r > 0) {
1571                                 r = ordered_set_put_in4_addrv(ntp, addresses, r, in4_addr_is_non_local);
1572                                 if (r < 0)
1573                                         return r;
1574                         } else if (r < 0 && r != -ENODATA)
1575                                 return r;
1576                 }
1577
1578                 if (link->network->dhcp_use_sip) {
1579                         const struct in_addr *addresses;
1580
1581                         r = sd_dhcp_lease_get_sip(link->dhcp_lease, &addresses);
1582                         if (r > 0) {
1583                                 r = ordered_set_put_in4_addrv(sip, addresses, r, in4_addr_is_non_local);
1584                                 if (r < 0)
1585                                         return r;
1586                         } else if (r < 0 && r != -ENODATA)
1587                                 return r;
1588                 }
1589
1590                 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
1591                         const char *domainname;
1592                         char **domains = NULL;
1593
1594                         OrderedSet *target_domains = (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) ? search_domains : route_domains;
1595                         r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname);
1596                         if (r >= 0) {
1597                                 r = ordered_set_put_strdup(target_domains, domainname);
1598                                 if (r < 0)
1599                                         return r;
1600                         } else if (r != -ENODATA)
1601                                 return r;
1602
1603                         r = sd_dhcp_lease_get_search_domains(link->dhcp_lease, &domains);
1604                         if (r >= 0) {
1605                                 r = ordered_set_put_strdupv(target_domains, domains);
1606                                 if (r < 0)
1607                                         return r;
1608                         } else if (r != -ENODATA)
1609                                 return r;
1610                 }
1611         }
1612
1613         if (carrier_state >= LINK_CARRIER_STATE_ENSLAVED)
1614                 carrier_state = LINK_CARRIER_STATE_CARRIER;
1615
1616         operstate_str = link_operstate_to_string(operstate);
1617         assert(operstate_str);
1618
1619         carrier_state_str = link_carrier_state_to_string(carrier_state);
1620         assert(carrier_state_str);
1621
1622         address_state_str = link_address_state_to_string(address_state);
1623         assert(address_state_str);
1624
1625         r = fopen_temporary(m->state_file, &f, &temp_path);
1626         if (r < 0)
1627                 return r;
1628
1629         (void) fchmod(fileno(f), 0644);
1630
1631         fprintf(f,
1632                 "# This is private data. Do not parse.\n"
1633                 "OPER_STATE=%s\n"
1634                 "CARRIER_STATE=%s\n"
1635                 "ADDRESS_STATE=%s\n",
1636                 operstate_str, carrier_state_str, address_state_str);
1637
1638         ordered_set_print(f, "DNS=", dns);
1639         ordered_set_print(f, "NTP=", ntp);
1640         ordered_set_print(f, "SIP=", sip);
1641         ordered_set_print(f, "DOMAINS=", search_domains);
1642         ordered_set_print(f, "ROUTE_DOMAINS=", route_domains);
1643
1644         r = routing_policy_serialize_rules(m->rules, f);
1645         if (r < 0)
1646                 goto fail;
1647
1648         r = fflush_and_check(f);
1649         if (r < 0)
1650                 goto fail;
1651
1652         if (rename(temp_path, m->state_file) < 0) {
1653                 r = -errno;
1654                 goto fail;
1655         }
1656
1657         if (m->operational_state != operstate) {
1658                 m->operational_state = operstate;
1659                 if (strv_extend(&p, "OperationalState") < 0)
1660                         log_oom();
1661         }
1662
1663         if (m->carrier_state != carrier_state) {
1664                 m->carrier_state = carrier_state;
1665                 if (strv_extend(&p, "CarrierState") < 0)
1666                         log_oom();
1667         }
1668
1669         if (m->address_state != address_state) {
1670                 m->address_state = address_state;
1671                 if (strv_extend(&p, "AddressState") < 0)
1672                         log_oom();
1673         }
1674
1675         if (p) {
1676                 r = manager_send_changed_strv(m, p);
1677                 if (r < 0)
1678                         log_error_errno(r, "Could not emit changed properties: %m");
1679         }
1680
1681         m->dirty = false;
1682
1683         return 0;
1684
1685 fail:
1686         (void) unlink(m->state_file);
1687         (void) unlink(temp_path);
1688
1689         return log_error_errno(r, "Failed to save network state to %s: %m", m->state_file);
1690 }
1691
1692 static int manager_dirty_handler(sd_event_source *s, void *userdata) {
1693         Manager *m = userdata;
1694         Link *link;
1695         Iterator i;
1696
1697         assert(m);
1698
1699         if (m->dirty)
1700                 manager_save(m);
1701
1702         SET_FOREACH(link, m->dirty_links, i)
1703                 if (link_save(link) >= 0)
1704                         link_clean(link);
1705
1706         return 1;
1707 }
1708
1709 static int signal_terminate_callback(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
1710         Manager *m = userdata;
1711
1712         assert(m);
1713         m->restarting = false;
1714
1715         log_debug("Terminate operation initiated.");
1716
1717         return sd_event_exit(sd_event_source_get_event(s), 0);
1718 }
1719
1720 static int signal_restart_callback(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
1721         Manager *m = userdata;
1722
1723         assert(m);
1724         m->restarting = true;
1725
1726         log_debug("Restart operation initiated.");
1727
1728         return sd_event_exit(sd_event_source_get_event(s), 0);
1729 }
1730
1731 int manager_new(Manager **ret) {
1732         _cleanup_(manager_freep) Manager *m = NULL;
1733         int r;
1734
1735         m = new(Manager, 1);
1736         if (!m)
1737                 return -ENOMEM;
1738
1739         *m = (Manager) {
1740                 .speed_meter_interval_usec = SPEED_METER_DEFAULT_TIME_INTERVAL,
1741         };
1742
1743         m->state_file = strdup("/run/systemd/netif/state");
1744         if (!m->state_file)
1745                 return -ENOMEM;
1746
1747         r = sd_event_default(&m->event);
1748         if (r < 0)
1749                 return r;
1750
1751         assert_se(sigprocmask_many(SIG_SETMASK, NULL, SIGINT, SIGTERM, SIGUSR2, -1) >= 0);
1752
1753         (void) sd_event_set_watchdog(m->event, true);
1754         (void) sd_event_add_signal(m->event, NULL, SIGTERM, signal_terminate_callback, m);
1755         (void) sd_event_add_signal(m->event, NULL, SIGINT, signal_terminate_callback, m);
1756         (void) sd_event_add_signal(m->event, NULL, SIGUSR2, signal_restart_callback, m);
1757
1758         r = sd_event_add_post(m->event, NULL, manager_dirty_handler, m);
1759         if (r < 0)
1760                 return r;
1761
1762         r = manager_connect_rtnl(m);
1763         if (r < 0)
1764                 return r;
1765
1766         r = manager_connect_genl(m);
1767         if (r < 0)
1768                 return r;
1769
1770         r = manager_connect_udev(m);
1771         if (r < 0)
1772                 return r;
1773
1774         r = sd_resolve_default(&m->resolve);
1775         if (r < 0)
1776                 return r;
1777
1778         r = sd_resolve_attach_event(m->resolve, m->event, 0);
1779         if (r < 0)
1780                 return r;
1781
1782         r = setup_default_address_pool(m);
1783         if (r < 0)
1784                 return r;
1785
1786         m->duid.type = DUID_TYPE_EN;
1787
1788         (void) routing_policy_load_rules(m->state_file, &m->rules_saved);
1789
1790         *ret = TAKE_PTR(m);
1791
1792         return 0;
1793 }
1794
1795 void manager_free(Manager *m) {
1796         struct in6_addr *a;
1797         AddressPool *pool;
1798         Link *link;
1799
1800         if (!m)
1801                 return;
1802
1803         free(m->state_file);
1804
1805         while ((a = hashmap_first_key(m->dhcp6_prefixes)))
1806                 (void) dhcp6_prefix_remove(m, a);
1807         m->dhcp6_prefixes = hashmap_free(m->dhcp6_prefixes);
1808
1809         while ((link = hashmap_steal_first(m->links))) {
1810                 if (link->dhcp6_client)
1811                         (void) dhcp6_lease_pd_prefix_lost(link->dhcp6_client, link);
1812
1813                 (void) link_stop_clients(link, true);
1814
1815                 link_unref(link);
1816         }
1817
1818         m->dirty_links = set_free_with_destructor(m->dirty_links, link_unref);
1819         m->links_requesting_uuid = set_free_with_destructor(m->links_requesting_uuid, link_unref);
1820         m->links = hashmap_free_with_destructor(m->links, link_unref);
1821
1822         m->duids_requesting_uuid = set_free(m->duids_requesting_uuid);
1823         m->networks = ordered_hashmap_free_with_destructor(m->networks, network_unref);
1824
1825         m->netdevs = hashmap_free_with_destructor(m->netdevs, netdev_unref);
1826
1827         while ((pool = m->address_pools))
1828                 address_pool_free(pool);
1829
1830         /* routing_policy_rule_free() access m->rules and m->rules_foreign.
1831          * So, it is necessary to set NULL after the sets are freed. */
1832         m->rules = set_free_with_destructor(m->rules, routing_policy_rule_free);
1833         m->rules_foreign = set_free_with_destructor(m->rules_foreign, routing_policy_rule_free);
1834         set_free_with_destructor(m->rules_saved, routing_policy_rule_free);
1835
1836         sd_netlink_unref(m->rtnl);
1837         sd_netlink_unref(m->genl);
1838         sd_resolve_unref(m->resolve);
1839
1840         sd_event_source_unref(m->speed_meter_event_source);
1841         sd_event_unref(m->event);
1842
1843         sd_device_monitor_unref(m->device_monitor);
1844
1845         bus_verify_polkit_async_registry_free(m->polkit_registry);
1846         sd_bus_flush_close_unref(m->bus);
1847
1848         free(m->dynamic_timezone);
1849         free(m->dynamic_hostname);
1850
1851         free(m);
1852 }
1853
1854 int manager_start(Manager *m) {
1855         Link *link;
1856         Iterator i;
1857         int r;
1858
1859         assert(m);
1860
1861         r = manager_start_speed_meter(m);
1862         if (r < 0)
1863                 return log_error_errno(r, "Failed to initialize speed meter: %m");
1864
1865         /* The dirty handler will deal with future serialization, but the first one
1866            must be done explicitly. */
1867
1868         manager_save(m);
1869
1870         HASHMAP_FOREACH(link, m->links, i)
1871                 link_save(link);
1872
1873         return 0;
1874 }
1875
1876 int manager_load_config(Manager *m) {
1877         int r;
1878
1879         /* update timestamp */
1880         paths_check_timestamp(NETWORK_DIRS, &m->network_dirs_ts_usec, true);
1881
1882         r = netdev_load(m, false);
1883         if (r < 0)
1884                 return r;
1885
1886         r = network_load(m, &m->networks);
1887         if (r < 0)
1888                 return r;
1889
1890         return 0;
1891 }
1892
1893 bool manager_should_reload(Manager *m) {
1894         return paths_check_timestamp(NETWORK_DIRS, &m->network_dirs_ts_usec, false);
1895 }
1896
1897 int manager_rtnl_enumerate_links(Manager *m) {
1898         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1899         sd_netlink_message *link;
1900         int r;
1901
1902         assert(m);
1903         assert(m->rtnl);
1904
1905         r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);
1906         if (r < 0)
1907                 return r;
1908
1909         r = sd_netlink_message_request_dump(req, true);
1910         if (r < 0)
1911                 return r;
1912
1913         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1914         if (r < 0)
1915                 return r;
1916
1917         for (link = reply; link; link = sd_netlink_message_next(link)) {
1918                 int k;
1919
1920                 m->enumerating = true;
1921
1922                 k = manager_rtnl_process_link(m->rtnl, link, m);
1923                 if (k < 0)
1924                         r = k;
1925
1926                 m->enumerating = false;
1927         }
1928
1929         return r;
1930 }
1931
1932 int manager_rtnl_enumerate_addresses(Manager *m) {
1933         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1934         sd_netlink_message *addr;
1935         int r;
1936
1937         assert(m);
1938         assert(m->rtnl);
1939
1940         r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, 0);
1941         if (r < 0)
1942                 return r;
1943
1944         r = sd_netlink_message_request_dump(req, true);
1945         if (r < 0)
1946                 return r;
1947
1948         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1949         if (r < 0)
1950                 return r;
1951
1952         for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
1953                 int k;
1954
1955                 m->enumerating = true;
1956
1957                 k = manager_rtnl_process_address(m->rtnl, addr, m);
1958                 if (k < 0)
1959                         r = k;
1960
1961                 m->enumerating = false;
1962         }
1963
1964         return r;
1965 }
1966
1967 int manager_rtnl_enumerate_neighbors(Manager *m) {
1968         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1969         sd_netlink_message *neigh;
1970         int r;
1971
1972         assert(m);
1973         assert(m->rtnl);
1974
1975         r = sd_rtnl_message_new_neigh(m->rtnl, &req, RTM_GETNEIGH, 0, AF_UNSPEC);
1976         if (r < 0)
1977                 return r;
1978
1979         r = sd_netlink_message_request_dump(req, true);
1980         if (r < 0)
1981                 return r;
1982
1983         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1984         if (r < 0)
1985                 return r;
1986
1987         for (neigh = reply; neigh; neigh = sd_netlink_message_next(neigh)) {
1988                 int k;
1989
1990                 m->enumerating = true;
1991
1992                 k = manager_rtnl_process_neighbor(m->rtnl, neigh, m);
1993                 if (k < 0)
1994                         r = k;
1995
1996                 m->enumerating = false;
1997         }
1998
1999         return r;
2000 }
2001
2002 int manager_rtnl_enumerate_routes(Manager *m) {
2003         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2004         sd_netlink_message *route;
2005         int r;
2006
2007         assert(m);
2008         assert(m->rtnl);
2009
2010         r = sd_rtnl_message_new_route(m->rtnl, &req, RTM_GETROUTE, 0, 0);
2011         if (r < 0)
2012                 return r;
2013
2014         r = sd_netlink_message_request_dump(req, true);
2015         if (r < 0)
2016                 return r;
2017
2018         r = sd_netlink_call(m->rtnl, req, 0, &reply);
2019         if (r < 0)
2020                 return r;
2021
2022         for (route = reply; route; route = sd_netlink_message_next(route)) {
2023                 int k;
2024
2025                 m->enumerating = true;
2026
2027                 k = manager_rtnl_process_route(m->rtnl, route, m);
2028                 if (k < 0)
2029                         r = k;
2030
2031                 m->enumerating = false;
2032         }
2033
2034         return r;
2035 }
2036
2037 int manager_rtnl_enumerate_rules(Manager *m) {
2038         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2039         sd_netlink_message *rule;
2040         int r;
2041
2042         assert(m);
2043         assert(m->rtnl);
2044
2045         r = sd_rtnl_message_new_routing_policy_rule(m->rtnl, &req, RTM_GETRULE, 0);
2046         if (r < 0)
2047                 return r;
2048
2049         r = sd_netlink_message_request_dump(req, true);
2050         if (r < 0)
2051                 return r;
2052
2053         r = sd_netlink_call(m->rtnl, req, 0, &reply);
2054         if (r < 0) {
2055                 if (r == -EOPNOTSUPP) {
2056                         log_debug("FIB Rules are not supported by the kernel. Ignoring.");
2057                         return 0;
2058                 }
2059
2060                 return r;
2061         }
2062
2063         for (rule = reply; rule; rule = sd_netlink_message_next(rule)) {
2064                 int k;
2065
2066                 m->enumerating = true;
2067
2068                 k = manager_rtnl_process_rule(m->rtnl, rule, m);
2069                 if (k < 0)
2070                         r = k;
2071
2072                 m->enumerating = false;
2073         }
2074
2075         return r;
2076 }
2077
2078 int manager_rtnl_enumerate_nexthop(Manager *m) {
2079         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2080         sd_netlink_message *nexthop;
2081         int r;
2082
2083         assert(m);
2084         assert(m->rtnl);
2085
2086         r = sd_rtnl_message_new_nexthop(m->rtnl, &req, RTM_GETNEXTHOP, 0, 0);
2087         if (r < 0)
2088                 return r;
2089
2090         r = sd_netlink_message_request_dump(req, true);
2091         if (r < 0)
2092                 return r;
2093
2094         r = sd_netlink_call(m->rtnl, req, 0, &reply);
2095         if (r < 0) {
2096                 if (r == -EOPNOTSUPP) {
2097                         log_debug("Nexthop are not supported by the kernel. Ignoring.");
2098                         return 0;
2099                 }
2100
2101                 return r;
2102         }
2103
2104         for (nexthop = reply; nexthop; nexthop = sd_netlink_message_next(nexthop)) {
2105                 int k;
2106
2107                 m->enumerating = true;
2108
2109                 k = manager_rtnl_process_nexthop(m->rtnl, nexthop, m);
2110                 if (k < 0)
2111                         r = k;
2112
2113                 m->enumerating = false;
2114         }
2115
2116         return r;
2117 }
2118
2119 int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, union in_addr_union *found) {
2120         AddressPool *p;
2121         int r;
2122
2123         assert(m);
2124         assert(prefixlen > 0);
2125         assert(found);
2126
2127         LIST_FOREACH(address_pools, p, m->address_pools) {
2128                 if (p->family != family)
2129                         continue;
2130
2131                 r = address_pool_acquire(p, prefixlen, found);
2132                 if (r != 0)
2133                         return r;
2134         }
2135
2136         return 0;
2137 }
2138
2139 Link* manager_find_uplink(Manager *m, Link *exclude) {
2140         _cleanup_free_ struct local_address *gateways = NULL;
2141         int n, i;
2142
2143         assert(m);
2144
2145         /* Looks for a suitable "uplink", via black magic: an
2146          * interface that is up and where the default route with the
2147          * highest priority points to. */
2148
2149         n = local_gateways(m->rtnl, 0, AF_UNSPEC, &gateways);
2150         if (n < 0) {
2151                 log_warning_errno(n, "Failed to determine list of default gateways: %m");
2152                 return NULL;
2153         }
2154
2155         for (i = 0; i < n; i++) {
2156                 Link *link;
2157
2158                 link = hashmap_get(m->links, INT_TO_PTR(gateways[i].ifindex));
2159                 if (!link) {
2160                         log_debug("Weird, found a gateway for a link we don't know. Ignoring.");
2161                         continue;
2162                 }
2163
2164                 if (link == exclude)
2165                         continue;
2166
2167                 if (link->operstate < LINK_OPERSTATE_ROUTABLE)
2168                         continue;
2169
2170                 return link;
2171         }
2172
2173         return NULL;
2174 }
2175
2176 void manager_dirty(Manager *manager) {
2177         assert(manager);
2178
2179         /* the serialized state in /run is no longer up-to-date */
2180         manager->dirty = true;
2181 }
2182
2183 static int set_hostname_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2184         Manager *manager = userdata;
2185         const sd_bus_error *e;
2186
2187         assert(m);
2188         assert(manager);
2189
2190         e = sd_bus_message_get_error(m);
2191         if (e)
2192                 log_warning_errno(sd_bus_error_get_errno(e), "Could not set hostname: %s", e->message);
2193
2194         return 1;
2195 }
2196
2197 int manager_set_hostname(Manager *m, const char *hostname) {
2198         int r;
2199
2200         log_debug("Setting transient hostname: '%s'", strna(hostname));
2201
2202         if (free_and_strdup(&m->dynamic_hostname, hostname) < 0)
2203                 return log_oom();
2204
2205         if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
2206                 log_debug("Not connected to system bus, setting hostname later.");
2207                 return 0;
2208         }
2209
2210         r = sd_bus_call_method_async(
2211                         m->bus,
2212                         NULL,
2213                         "org.freedesktop.hostname1",
2214                         "/org/freedesktop/hostname1",
2215                         "org.freedesktop.hostname1",
2216                         "SetHostname",
2217                         set_hostname_handler,
2218                         m,
2219                         "sb",
2220                         hostname,
2221                         false);
2222
2223         if (r < 0)
2224                 return log_error_errno(r, "Could not set transient hostname: %m");
2225
2226         return 0;
2227 }
2228
2229 static int set_timezone_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2230         Manager *manager = userdata;
2231         const sd_bus_error *e;
2232
2233         assert(m);
2234         assert(manager);
2235
2236         e = sd_bus_message_get_error(m);
2237         if (e)
2238                 log_warning_errno(sd_bus_error_get_errno(e), "Could not set timezone: %s", e->message);
2239
2240         return 1;
2241 }
2242
2243 int manager_set_timezone(Manager *m, const char *tz) {
2244         int r;
2245
2246         assert(m);
2247         assert(tz);
2248
2249         log_debug("Setting system timezone: '%s'", tz);
2250         if (free_and_strdup(&m->dynamic_timezone, tz) < 0)
2251                 return log_oom();
2252
2253         if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
2254                 log_debug("Not connected to system bus, setting timezone later.");
2255                 return 0;
2256         }
2257
2258         r = sd_bus_call_method_async(
2259                         m->bus,
2260                         NULL,
2261                         "org.freedesktop.timedate1",
2262                         "/org/freedesktop/timedate1",
2263                         "org.freedesktop.timedate1",
2264                         "SetTimezone",
2265                         set_timezone_handler,
2266                         m,
2267                         "sb",
2268                         tz,
2269                         false);
2270         if (r < 0)
2271                 return log_error_errno(r, "Could not set timezone: %m");
2272
2273         return 0;
2274 }
2275
2276 int manager_request_product_uuid(Manager *m, Link *link) {
2277         int r;
2278
2279         assert(m);
2280
2281         if (m->has_product_uuid)
2282                 return 0;
2283
2284         log_debug("Requesting product UUID");
2285
2286         if (link) {
2287                 DUID *duid;
2288
2289                 assert_se(duid = link_get_duid(link));
2290
2291                 r = set_ensure_allocated(&m->links_requesting_uuid, NULL);
2292                 if (r < 0)
2293                         return log_oom();
2294
2295                 r = set_ensure_allocated(&m->duids_requesting_uuid, NULL);
2296                 if (r < 0)
2297                         return log_oom();
2298
2299                 r = set_put(m->links_requesting_uuid, link);
2300                 if (r < 0)
2301                         return log_oom();
2302
2303                 r = set_put(m->duids_requesting_uuid, duid);
2304                 if (r < 0)
2305                         return log_oom();
2306
2307                 link_ref(link);
2308         }
2309
2310         if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
2311                 log_debug("Not connected to system bus, requesting product UUID later.");
2312                 return 0;
2313         }
2314
2315         r = sd_bus_call_method_async(
2316                         m->bus,
2317                         NULL,
2318                         "org.freedesktop.hostname1",
2319                         "/org/freedesktop/hostname1",
2320                         "org.freedesktop.hostname1",
2321                         "GetProductUUID",
2322                         get_product_uuid_handler,
2323                         m,
2324                         "b",
2325                         false);
2326         if (r < 0)
2327                 return log_warning_errno(r, "Failed to get product UUID: %m");
2328
2329         return 0;
2330 }