src/network/networkd-manager.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <sys/socket.h>
   4 #include <linux/if.h>
   5 #include <linux/fib_rules.h>
   6 #include <stdio_ext.h>
   7
   8 #include "sd-daemon.h"
   9 #include "sd-netlink.h"
  10
  11 #include "alloc-util.h"
  12 #include "bus-util.h"
  13 #include "conf-parser.h"
  14 #include "def.h"
  15 #include "device-util.h"
  16 #include "dns-domain.h"
  17 #include "fd-util.h"
  18 #include "fileio.h"
  19 #include "local-addresses.h"
  20 #include "netlink-util.h"
  21 #include "networkd-manager.h"
  22 #include "ordered-set.h"
  23 #include "path-util.h"
  24 #include "set.h"
  25 #include "strv.h"
  26 #include "virt.h"
  27
  28 /* use 8 MB for receive socket kernel queue. */
  29 #define RCVBUF_SIZE    (8*1024*1024)
  30
  31 const char* const network_dirs[] = {
  32         "/etc/systemd/network",
  33         "/run/systemd/network",
  34         "/usr/lib/systemd/network",
  35 #if HAVE_SPLIT_USR
  36         "/lib/systemd/network",
  37 #endif
  38         NULL};
  39
  40 static int setup_default_address_pool(Manager *m) {
  41         AddressPool *p;
  42         int r;
  43
  44         assert(m);
  45
  46         /* Add in the well-known private address ranges. */
  47
  48         r = address_pool_new_from_string(m, &p, AF_INET6, "fc00::", 7);
  49         if (r < 0)
  50                 return r;
  51
  52         r = address_pool_new_from_string(m, &p, AF_INET, "192.168.0.0", 16);
  53         if (r < 0)
  54                 return r;
  55
  56         r = address_pool_new_from_string(m, &p, AF_INET, "172.16.0.0", 12);
  57         if (r < 0)
  58                 return r;
  59
  60         r = address_pool_new_from_string(m, &p, AF_INET, "10.0.0.0", 8);
  61         if (r < 0)
  62                 return r;
  63
  64         return 0;
  65 }
  66
  67 static int manager_reset_all(Manager *m) {
  68         Link *link;
  69         Iterator i;
  70         int r;
  71
  72         assert(m);
  73
  74         HASHMAP_FOREACH(link, m->links, i) {
  75                 r = link_carrier_reset(link);
  76                 if (r < 0)
  77                         log_link_warning_errno(link, r, "Could not reset carrier: %m");
  78         }
  79
  80         return 0;
  81 }
  82
  83 static int match_prepare_for_sleep(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
  84         Manager *m = userdata;
  85         int b, r;
  86
  87         assert(message);
  88         assert(m);
  89
  90         r = sd_bus_message_read(message, "b", &b);
  91         if (r < 0) {
  92                 log_debug_errno(r, "Failed to parse PrepareForSleep signal: %m");
  93                 return 0;
  94         }
  95
  96         if (b)
  97                 return 0;
  98
  99         log_debug("Coming back from suspend, resetting all connections...");
 100
 101         (void) manager_reset_all(m);
 102
 103         return 0;
 104 }
 105
 106 static int on_connected(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
 107         Manager *m = userdata;
 108
 109         assert(message);
 110         assert(m);
 111
 112         /* Did we get a timezone or transient hostname from DHCP while D-Bus wasn't up yet? */
 113         if (m->dynamic_hostname)
 114                 (void) manager_set_hostname(m, m->dynamic_hostname);
 115         if (m->dynamic_timezone)
 116                 (void) manager_set_timezone(m, m->dynamic_timezone);
 117         if (m->links_requesting_uuid)
 118                 (void) manager_request_product_uuid(m, NULL);
 119
 120         return 0;
 121 }
 122
 123 int manager_connect_bus(Manager *m) {
 124         int r;
 125
 126         assert(m);
 127
 128         if (m->bus)
 129                 return 0;
 130
 131         r = bus_open_system_watch_bind_with_description(&m->bus, "bus-api-network");
 132         if (r < 0)
 133                 return log_error_errno(r, "Failed to connect to bus: %m");
 134
 135         r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/network1", "org.freedesktop.network1.Manager", manager_vtable, m);
 136         if (r < 0)
 137                 return log_error_errno(r, "Failed to add manager object vtable: %m");
 138
 139         r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/link", "org.freedesktop.network1.Link", link_vtable, link_object_find, m);
 140         if (r < 0)
 141                return log_error_errno(r, "Failed to add link object vtable: %m");
 142
 143         r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/link", link_node_enumerator, m);
 144         if (r < 0)
 145                 return log_error_errno(r, "Failed to add link enumerator: %m");
 146
 147         r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/network", "org.freedesktop.network1.Network", network_vtable, network_object_find, m);
 148         if (r < 0)
 149                return log_error_errno(r, "Failed to add network object vtable: %m");
 150
 151         r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/network", network_node_enumerator, m);
 152         if (r < 0)
 153                 return log_error_errno(r, "Failed to add network enumerator: %m");
 154
 155         r = sd_bus_request_name_async(m->bus, NULL, "org.freedesktop.network1", 0, NULL, NULL);
 156         if (r < 0)
 157                 return log_error_errno(r, "Failed to request name: %m");
 158
 159         r = sd_bus_attach_event(m->bus, m->event, 0);
 160         if (r < 0)
 161                 return log_error_errno(r, "Failed to attach bus to event loop: %m");
 162
 163         r = sd_bus_match_signal_async(
 164                         m->bus,
 165                         NULL,
 166                         "org.freedesktop.DBus.Local",
 167                         NULL,
 168                         "org.freedesktop.DBus.Local",
 169                         "Connected",
 170                         on_connected, NULL, m);
 171         if (r < 0)
 172                 return log_error_errno(r, "Failed to request match on Connected signal: %m");
 173
 174         r = sd_bus_match_signal_async(
 175                         m->bus,
 176                         NULL,
 177                         "org.freedesktop.login1",
 178                         "/org/freedesktop/login1",
 179                         "org.freedesktop.login1.Manager",
 180                         "PrepareForSleep",
 181                         match_prepare_for_sleep, NULL, m);
 182         if (r < 0)
 183                 log_warning_errno(r, "Failed to request match for PrepareForSleep, ignoring: %m");
 184
 185         return 0;
 186 }
 187
 188 static int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) {
 189         Manager *m = userdata;
 190         const char *action;
 191         Link *link = NULL;
 192         int r, ifindex;
 193
 194         assert(m);
 195         assert(device);
 196
 197         r = sd_device_get_property_value(device, "ACTION", &action);
 198         if (r < 0) {
 199                 log_device_debug_errno(device, r, "Failed to get 'ACTION' property, ignoring device: %m");
 200                 return 0;
 201         }
 202
 203         if (!STR_IN_SET(action, "add", "change")) {
 204                 log_device_debug(device, "Ignoring udev %s event for device.", action);
 205                 return 0;
 206         }
 207
 208         r = sd_device_get_ifindex(device, &ifindex);
 209         if (r < 0) {
 210                 log_device_debug_errno(device, r, "Ignoring udev ADD event for device without ifindex or with invalid ifindex: %m");
 211                 return 0;
 212         }
 213
 214         r = link_get(m, ifindex, &link);
 215         if (r < 0) {
 216                 if (r != -ENODEV)
 217                         log_debug_errno(r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
 218                 return 0;
 219         }
 220
 221         (void) link_initialized(link, device);
 222
 223         return 0;
 224 }
 225
 226 static int manager_connect_udev(Manager *m) {
 227         int r;
 228
 229         /* udev does not initialize devices inside containers,
 230          * so we rely on them being already initialized before
 231          * entering the container */
 232         if (detect_container() > 0)
 233                 return 0;
 234
 235         r = sd_device_monitor_new(&m->device_monitor);
 236         if (r < 0)
 237                 return log_error_errno(r, "Failed to initialize device monitor: %m");
 238
 239         r = sd_device_monitor_filter_add_match_subsystem_devtype(m->device_monitor, "net", NULL);
 240         if (r < 0)
 241                 return log_error_errno(r, "Could not add device monitor filter: %m");
 242
 243         r = sd_device_monitor_attach_event(m->device_monitor, m->event);
 244         if (r < 0)
 245                 return log_error_errno(r, "Failed to attach event to device monitor: %m");
 246
 247         r = sd_device_monitor_start(m->device_monitor, manager_udev_process_link, m);
 248         if (r < 0)
 249                 return log_error_errno(r, "Failed to start device monitor: %m");
 250
 251         return 0;
 252 }
 253
 254 int manager_rtnl_process_route(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 255         Manager *m = userdata;
 256         Link *link = NULL;
 257         uint16_t type;
 258         uint32_t ifindex, priority = 0;
 259         unsigned char protocol, scope, tos, table, rt_type;
 260         int family;
 261         unsigned char dst_prefixlen, src_prefixlen;
 262         union in_addr_union dst = {}, gw = {}, src = {}, prefsrc = {};
 263         Route *route = NULL;
 264         int r;
 265
 266         assert(rtnl);
 267         assert(message);
 268         assert(m);
 269
 270         if (sd_netlink_message_is_error(message)) {
 271                 r = sd_netlink_message_get_errno(message);
 272                 if (r < 0)
 273                         log_warning_errno(r, "rtnl: failed to receive route, ignoring: %m");
 274
 275                 return 0;
 276         }
 277
 278         r = sd_netlink_message_get_type(message, &type);
 279         if (r < 0) {
 280                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
 281                 return 0;
 282         } else if (!IN_SET(type, RTM_NEWROUTE, RTM_DELROUTE)) {
 283                 log_warning("rtnl: received unexpected message type when processing route, ignoring");
 284                 return 0;
 285         }
 286
 287         r = sd_netlink_message_read_u32(message, RTA_OIF, &ifindex);
 288         if (r == -ENODATA) {
 289                 log_debug("rtnl: received route without ifindex, ignoring");
 290                 return 0;
 291         } else if (r < 0) {
 292                 log_warning_errno(r, "rtnl: could not get ifindex from route, ignoring: %m");
 293                 return 0;
 294         } else if (ifindex <= 0) {
 295                 log_warning("rtnl: received route message with invalid ifindex, ignoring: %d", ifindex);
 296                 return 0;
 297         } else {
 298                 r = link_get(m, ifindex, &link);
 299                 if (r < 0 || !link) {
 300                         /* when enumerating we might be out of sync, but we will
 301                          * get the route again, so just ignore it */
 302                         if (!m->enumerating)
 303                                 log_warning("rtnl: received route for nonexistent link (%d), ignoring", ifindex);
 304                         return 0;
 305                 }
 306         }
 307
 308         r = sd_rtnl_message_route_get_family(message, &family);
 309         if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) {
 310                 log_link_warning(link, "rtnl: received address with invalid family, ignoring");
 311                 return 0;
 312         }
 313
 314         r = sd_rtnl_message_route_get_protocol(message, &protocol);
 315         if (r < 0) {
 316                 log_warning_errno(r, "rtnl: could not get route protocol: %m");
 317                 return 0;
 318         }
 319
 320         switch (family) {
 321         case AF_INET:
 322                 r = sd_netlink_message_read_in_addr(message, RTA_DST, &dst.in);
 323                 if (r < 0 && r != -ENODATA) {
 324                         log_link_warning_errno(link, r, "rtnl: received route without valid destination, ignoring: %m");
 325                         return 0;
 326                 }
 327
 328                 r = sd_netlink_message_read_in_addr(message, RTA_GATEWAY, &gw.in);
 329                 if (r < 0 && r != -ENODATA) {
 330                         log_link_warning_errno(link, r, "rtnl: received route with invalid gateway, ignoring: %m");
 331                         return 0;
 332                 }
 333
 334                 r = sd_netlink_message_read_in_addr(message, RTA_SRC, &src.in);
 335                 if (r < 0 && r != -ENODATA) {
 336                         log_link_warning_errno(link, r, "rtnl: received route with invalid source, ignoring: %m");
 337                         return 0;
 338                 }
 339
 340                 r = sd_netlink_message_read_in_addr(message, RTA_PREFSRC, &prefsrc.in);
 341                 if (r < 0 && r != -ENODATA) {
 342                         log_link_warning_errno(link, r, "rtnl: received route with invalid preferred source, ignoring: %m");
 343                         return 0;
 344                 }
 345
 346                 break;
 347
 348         case AF_INET6:
 349                 r = sd_netlink_message_read_in6_addr(message, RTA_DST, &dst.in6);
 350                 if (r < 0 && r != -ENODATA) {
 351                         log_link_warning_errno(link, r, "rtnl: received route without valid destination, ignoring: %m");
 352                         return 0;
 353                 }
 354
 355                 r = sd_netlink_message_read_in6_addr(message, RTA_GATEWAY, &gw.in6);
 356                 if (r < 0 && r != -ENODATA) {
 357                         log_link_warning_errno(link, r, "rtnl: received route with invalid gateway, ignoring: %m");
 358                         return 0;
 359                 }
 360
 361                 r = sd_netlink_message_read_in6_addr(message, RTA_SRC, &src.in6);
 362                 if (r < 0 && r != -ENODATA) {
 363                         log_link_warning_errno(link, r, "rtnl: received route with invalid source, ignoring: %m");
 364                         return 0;
 365                 }
 366
 367                 r = sd_netlink_message_read_in6_addr(message, RTA_PREFSRC, &prefsrc.in6);
 368                 if (r < 0 && r != -ENODATA) {
 369                         log_link_warning_errno(link, r, "rtnl: received route with invalid preferred source, ignoring: %m");
 370                         return 0;
 371                 }
 372
 373                 break;
 374
 375         default:
 376                 assert_not_reached("Received unsupported address family");
 377                 return 0;
 378         }
 379
 380         r = sd_rtnl_message_route_get_dst_prefixlen(message, &dst_prefixlen);
 381         if (r < 0) {
 382                 log_link_warning_errno(link, r, "rtnl: received route with invalid destination prefixlen, ignoring: %m");
 383                 return 0;
 384         }
 385
 386         r = sd_rtnl_message_route_get_src_prefixlen(message, &src_prefixlen);
 387         if (r < 0) {
 388                 log_link_warning_errno(link, r, "rtnl: received route with invalid source prefixlen, ignoring: %m");
 389                 return 0;
 390         }
 391
 392         r = sd_rtnl_message_route_get_scope(message, &scope);
 393         if (r < 0) {
 394                 log_link_warning_errno(link, r, "rtnl: received route with invalid scope, ignoring: %m");
 395                 return 0;
 396         }
 397
 398         r = sd_rtnl_message_route_get_tos(message, &tos);
 399         if (r < 0) {
 400                 log_link_warning_errno(link, r, "rtnl: received route with invalid tos, ignoring: %m");
 401                 return 0;
 402         }
 403
 404         r = sd_rtnl_message_route_get_type(message, &rt_type);
 405         if (r < 0) {
 406                 log_link_warning_errno(link, r, "rtnl: received route with invalid type, ignoring: %m");
 407                 return 0;
 408         }
 409
 410         r = sd_rtnl_message_route_get_table(message, &table);
 411         if (r < 0) {
 412                 log_link_warning_errno(link, r, "rtnl: received route with invalid table, ignoring: %m");
 413                 return 0;
 414         }
 415
 416         r = sd_netlink_message_read_u32(message, RTA_PRIORITY, &priority);
 417         if (r < 0 && r != -ENODATA) {
 418                 log_link_warning_errno(link, r, "rtnl: received route with invalid priority, ignoring: %m");
 419                 return 0;
 420         }
 421
 422         (void) route_get(link, family, &dst, dst_prefixlen, tos, priority, table, &route);
 423
 424         switch (type) {
 425         case RTM_NEWROUTE:
 426                 if (!route) {
 427                         /* A route appeared that we did not request */
 428                         r = route_add_foreign(link, family, &dst, dst_prefixlen, tos, priority, table, &route);
 429                         if (r < 0) {
 430                                 log_link_warning_errno(link, r, "Failed to add route, ignoring: %m");
 431                                 return 0;
 432                         }
 433                 }
 434
 435                 route_update(route, &src, src_prefixlen, &gw, &prefsrc, scope, protocol, rt_type);
 436
 437                 break;
 438
 439         case RTM_DELROUTE:
 440                 route_free(route);
 441                 break;
 442
 443         default:
 444                 assert_not_reached("Received invalid RTNL message type");
 445         }
 446
 447         return 1;
 448 }
 449
 450 int manager_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 451         Manager *m = userdata;
 452         Link *link = NULL;
 453         uint16_t type;
 454         unsigned char flags;
 455         int family;
 456         unsigned char prefixlen;
 457         unsigned char scope;
 458         union in_addr_union in_addr;
 459         struct ifa_cacheinfo cinfo;
 460         Address *address = NULL;
 461         char buf[INET6_ADDRSTRLEN], valid_buf[FORMAT_TIMESPAN_MAX];
 462         const char *valid_str = NULL;
 463         int r, ifindex;
 464
 465         assert(rtnl);
 466         assert(message);
 467         assert(m);
 468
 469         if (sd_netlink_message_is_error(message)) {
 470                 r = sd_netlink_message_get_errno(message);
 471                 if (r < 0)
 472                         log_warning_errno(r, "rtnl: failed to receive address, ignoring: %m");
 473
 474                 return 0;
 475         }
 476
 477         r = sd_netlink_message_get_type(message, &type);
 478         if (r < 0) {
 479                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
 480                 return 0;
 481         } else if (!IN_SET(type, RTM_NEWADDR, RTM_DELADDR)) {
 482                 log_warning("rtnl: received unexpected message type when processing address, ignoring");
 483                 return 0;
 484         }
 485
 486         r = sd_rtnl_message_addr_get_ifindex(message, &ifindex);
 487         if (r < 0) {
 488                 log_warning_errno(r, "rtnl: could not get ifindex from address, ignoring: %m");
 489                 return 0;
 490         } else if (ifindex <= 0) {
 491                 log_warning("rtnl: received address message with invalid ifindex, ignoring: %d", ifindex);
 492                 return 0;
 493         } else {
 494                 r = link_get(m, ifindex, &link);
 495                 if (r < 0 || !link) {
 496                         /* when enumerating we might be out of sync, but we will
 497                          * get the address again, so just ignore it */
 498                         if (!m->enumerating)
 499                                 log_warning("rtnl: received address for nonexistent link (%d), ignoring", ifindex);
 500                         return 0;
 501                 }
 502         }
 503
 504         r = sd_rtnl_message_addr_get_family(message, &family);
 505         if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) {
 506                 log_link_warning(link, "rtnl: received address with invalid family, ignoring");
 507                 return 0;
 508         }
 509
 510         r = sd_rtnl_message_addr_get_prefixlen(message, &prefixlen);
 511         if (r < 0) {
 512                 log_link_warning_errno(link, r, "rtnl: received address with invalid prefixlen, ignoring: %m");
 513                 return 0;
 514         }
 515
 516         r = sd_rtnl_message_addr_get_scope(message, &scope);
 517         if (r < 0) {
 518                 log_link_warning_errno(link, r, "rtnl: received address with invalid scope, ignoring: %m");
 519                 return 0;
 520         }
 521
 522         r = sd_rtnl_message_addr_get_flags(message, &flags);
 523         if (r < 0) {
 524                 log_link_warning_errno(link, r, "rtnl: received address with invalid flags, ignoring: %m");
 525                 return 0;
 526         }
 527
 528         switch (family) {
 529         case AF_INET:
 530                 r = sd_netlink_message_read_in_addr(message, IFA_LOCAL, &in_addr.in);
 531                 if (r < 0) {
 532                         log_link_warning_errno(link, r, "rtnl: received address without valid address, ignoring: %m");
 533                         return 0;
 534                 }
 535
 536                 break;
 537
 538         case AF_INET6:
 539                 r = sd_netlink_message_read_in6_addr(message, IFA_ADDRESS, &in_addr.in6);
 540                 if (r < 0) {
 541                         log_link_warning_errno(link, r, "rtnl: received address without valid address, ignoring: %m");
 542                         return 0;
 543                 }
 544
 545                 break;
 546
 547         default:
 548                 assert_not_reached("Received unsupported address family");
 549         }
 550
 551         if (!inet_ntop(family, &in_addr, buf, INET6_ADDRSTRLEN)) {
 552                 log_link_warning(link, "Could not print address, ignoring");
 553                 return 0;
 554         }
 555
 556         r = sd_netlink_message_read_cache_info(message, IFA_CACHEINFO, &cinfo);
 557         if (r < 0 && r != -ENODATA) {
 558                 log_link_warning_errno(link, r, "rtnl: cannot get IFA_CACHEINFO attribute, ignoring: %m");
 559                 return 0;
 560         } else if (r >= 0) {
 561                 if (cinfo.ifa_valid != CACHE_INFO_INFINITY_LIFE_TIME)
 562                         valid_str = format_timespan(valid_buf, FORMAT_TIMESPAN_MAX,
 563                                                     cinfo.ifa_valid * USEC_PER_SEC,
 564                                                     USEC_PER_SEC);
 565         }
 566
 567         (void) address_get(link, family, &in_addr, prefixlen, &address);
 568
 569         switch (type) {
 570         case RTM_NEWADDR:
 571                 if (address)
 572                         log_link_debug(link, "Updating address: %s/%u (valid %s%s)", buf, prefixlen,
 573                                        valid_str ? "for " : "forever", strempty(valid_str));
 574                 else {
 575                         /* An address appeared that we did not request */
 576                         r = address_add_foreign(link, family, &in_addr, prefixlen, &address);
 577                         if (r < 0) {
 578                                 log_link_warning_errno(link, r, "Failed to add address %s/%u, ignoring: %m", buf, prefixlen);
 579                                 return 0;
 580                         } else
 581                                 log_link_debug(link, "Adding address: %s/%u (valid %s%s)", buf, prefixlen,
 582                                                valid_str ? "for " : "forever", strempty(valid_str));
 583                 }
 584
 585                 r = address_update(address, flags, scope, &cinfo);
 586                 if (r < 0) {
 587                         log_link_warning_errno(link, r, "Failed to update address %s/%u, ignoring: %m", buf, prefixlen);
 588                         return 0;
 589                 }
 590
 591                 break;
 592
 593         case RTM_DELADDR:
 594
 595                 if (address) {
 596                         log_link_debug(link, "Removing address: %s/%u (valid %s%s)", buf, prefixlen,
 597                                        valid_str ? "for " : "forever", strempty(valid_str));
 598                         (void) address_drop(address);
 599                 } else
 600                         log_link_warning(link, "Removing non-existent address: %s/%u (valid %s%s), ignoring", buf, prefixlen,
 601                                          valid_str ? "for " : "forever", strempty(valid_str));
 602
 603                 break;
 604         default:
 605                 assert_not_reached("Received invalid RTNL message type");
 606         }
 607
 608         return 1;
 609 }
 610
 611 static int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 612         Manager *m = userdata;
 613         Link *link = NULL;
 614         NetDev *netdev = NULL;
 615         uint16_t type;
 616         const char *name;
 617         int r, ifindex;
 618
 619         assert(rtnl);
 620         assert(message);
 621         assert(m);
 622
 623         if (sd_netlink_message_is_error(message)) {
 624                 r = sd_netlink_message_get_errno(message);
 625                 if (r < 0)
 626                         log_warning_errno(r, "rtnl: Could not receive link, ignoring: %m");
 627
 628                 return 0;
 629         }
 630
 631         r = sd_netlink_message_get_type(message, &type);
 632         if (r < 0) {
 633                 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
 634                 return 0;
 635         } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
 636                 log_warning("rtnl: Received unexpected message type when processing link, ignoring");
 637                 return 0;
 638         }
 639
 640         r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
 641         if (r < 0) {
 642                 log_warning_errno(r, "rtnl: Could not get ifindex from link, ignoring: %m");
 643                 return 0;
 644         } else if (ifindex <= 0) {
 645                 log_warning("rtnl: received link message with invalid ifindex %d, ignoring", ifindex);
 646                 return 0;
 647         }
 648
 649         r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
 650         if (r < 0) {
 651                 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
 652                 return 0;
 653         }
 654
 655         (void) link_get(m, ifindex, &link);
 656         (void) netdev_get(m, name, &netdev);
 657
 658         switch (type) {
 659         case RTM_NEWLINK:
 660                 if (!link) {
 661                         /* link is new, so add it */
 662                         r = link_add(m, message, &link);
 663                         if (r < 0) {
 664                                 log_warning_errno(r, "Could not add new link, ignoring: %m");
 665                                 return 0;
 666                         }
 667                 }
 668
 669                 if (netdev) {
 670                         /* netdev exists, so make sure the ifindex matches */
 671                         r = netdev_set_ifindex(netdev, message);
 672                         if (r < 0) {
 673                                 log_warning_errno(r, "Could not set ifindex on netdev, ignoring: %m");
 674                                 return 0;
 675                         }
 676                 }
 677
 678                 r = link_update(link, message);
 679                 if (r < 0) {
 680                         log_warning_errno(r, "Could not update link, ignoring: %m");
 681                         return 0;
 682                 }
 683
 684                 break;
 685
 686         case RTM_DELLINK:
 687                 link_drop(link);
 688                 netdev_drop(netdev);
 689
 690                 break;
 691
 692         default:
 693                 assert_not_reached("Received invalid RTNL message type.");
 694         }
 695
 696         return 1;
 697 }
 698
 699 int manager_rtnl_process_rule(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 700         uint8_t tos = 0, to_prefixlen = 0, from_prefixlen = 0;
 701         union in_addr_union to = {}, from = {};
 702         RoutingPolicyRule *rule = NULL;
 703         uint32_t fwmark = 0, table = 0;
 704         const char *iif = NULL, *oif = NULL;
 705         Manager *m = userdata;
 706         uint16_t type;
 707         int family;
 708         int r;
 709
 710         assert(rtnl);
 711         assert(message);
 712         assert(m);
 713
 714         if (sd_netlink_message_is_error(message)) {
 715                 r = sd_netlink_message_get_errno(message);
 716                 if (r < 0)
 717                         log_warning_errno(r, "rtnl: failed to receive rule, ignoring: %m");
 718
 719                 return 0;
 720         }
 721
 722         r = sd_netlink_message_get_type(message, &type);
 723         if (r < 0) {
 724                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
 725                 return 0;
 726         } else if (!IN_SET(type, RTM_NEWRULE, RTM_DELRULE)) {
 727                 log_warning("rtnl: received unexpected message type '%u' when processing rule, ignoring", type);
 728                 return 0;
 729         }
 730
 731         r = sd_rtnl_message_get_family(message, &family);
 732         if (r < 0) {
 733                 log_warning_errno(r, "rtnl: could not get rule family, ignoring: %m");
 734                 return 0;
 735         } else if (!IN_SET(family, AF_INET, AF_INET6)) {
 736                 log_debug("rtnl: received address with invalid family %u, ignoring", family);
 737                 return 0;
 738         }
 739
 740         switch (family) {
 741         case AF_INET:
 742                 r = sd_netlink_message_read_in_addr(message, FRA_SRC, &from.in);
 743                 if (r < 0 && r != -ENODATA) {
 744                         log_warning_errno(r, "rtnl: could not get FRA_SRC attribute, ignoring: %m");
 745                         return 0;
 746                 } else if (r >= 0) {
 747                         r = sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(message, &from_prefixlen);
 748                         if (r < 0) {
 749                                 log_warning_errno(r, "rtnl: failed to retrieve rule from prefix length, ignoring: %m");
 750                                 return 0;
 751                         }
 752                 }
 753
 754                 r = sd_netlink_message_read_in_addr(message, FRA_DST, &to.in);
 755                 if (r < 0 && r != -ENODATA) {
 756                         log_warning_errno(r, "rtnl: could not get FRA_DST attribute, ignoring: %m");
 757                         return 0;
 758                 } else if (r >= 0) {
 759                         r = sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(message, &to_prefixlen);
 760                         if (r < 0) {
 761                                 log_warning_errno(r, "rtnl: failed to retrieve rule to prefix length, ignoring: %m");
 762                                 return 0;
 763                         }
 764                 }
 765
 766                 break;
 767
 768         case AF_INET6:
 769                 r = sd_netlink_message_read_in6_addr(message, FRA_SRC, &from.in6);
 770                 if (r < 0 && r != -ENODATA) {
 771                         log_warning_errno(r, "rtnl: could not get FRA_SRC attribute, ignoring: %m");
 772                         return 0;
 773                 } else if (r >= 0) {
 774                         r = sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(message, &from_prefixlen);
 775                         if (r < 0) {
 776                                 log_warning_errno(r, "rtnl: failed to retrieve rule from prefix length, ignoring: %m");
 777                                 return 0;
 778                         }
 779                 }
 780
 781                 r = sd_netlink_message_read_in6_addr(message, FRA_DST, &to.in6);
 782                 if (r < 0 && r != -ENODATA) {
 783                         log_warning_errno(r, "rtnl: could not get FRA_DST attribute, ignoring: %m");
 784                         return 0;
 785                 } else if (r >= 0) {
 786                         r = sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(message, &to_prefixlen);
 787                         if (r < 0) {
 788                                 log_warning_errno(r, "rtnl: failed to retrieve rule to prefix length, ignoring: %m");
 789                                 return 0;
 790                         }
 791                 }
 792
 793                 break;
 794
 795         default:
 796                 assert_not_reached("Received unsupported address family");
 797         }
 798
 799         if (from_prefixlen == 0 && to_prefixlen == 0)
 800                 return 0;
 801
 802         r = sd_netlink_message_read_u32(message, FRA_FWMARK, &fwmark);
 803         if (r < 0 && r != -ENODATA) {
 804                 log_warning_errno(r, "rtnl: could not get FRA_FWMARK attribute, ignoring: %m");
 805                 return 0;
 806         }
 807
 808         r = sd_netlink_message_read_u32(message, FRA_TABLE, &table);
 809         if (r < 0 && r != -ENODATA) {
 810                 log_warning_errno(r, "rtnl: could not get FRA_TABLE attribute, ignoring: %m");
 811                 return 0;
 812         }
 813
 814         r = sd_rtnl_message_routing_policy_rule_get_tos(message, &tos);
 815         if (r < 0 && r != -ENODATA) {
 816                 log_warning_errno(r, "rtnl: could not get ip rule TOS, ignoring: %m");
 817                 return 0;
 818         }
 819
 820         r = sd_netlink_message_read_string(message, FRA_IIFNAME, &iif);
 821         if (r < 0 && r != -ENODATA) {
 822                 log_warning_errno(r, "rtnl: could not get FRA_IIFNAME attribute, ignoring: %m");
 823                 return 0;
 824         }
 825
 826         r = sd_netlink_message_read_string(message, FRA_OIFNAME, &oif);
 827         if (r < 0 && r != -ENODATA) {
 828                 log_warning_errno(r, "rtnl: could not get FRA_OIFNAME attribute, ignoring: %m");
 829                 return 0;
 830         }
 831
 832         (void) routing_policy_rule_get(m, family, &from, from_prefixlen, &to, to_prefixlen, tos, fwmark, table, iif, oif, &rule);
 833
 834         switch (type) {
 835         case RTM_NEWRULE:
 836                 if (!rule) {
 837                         r = routing_policy_rule_add_foreign(m, family, &from, from_prefixlen, &to, to_prefixlen, tos, fwmark, table, iif, oif, &rule);
 838                         if (r < 0) {
 839                                 log_warning_errno(r, "Could not add rule, ignoring: %m");
 840                                 return 0;
 841                         }
 842                 }
 843                 break;
 844         case RTM_DELRULE:
 845                 routing_policy_rule_free(rule);
 846
 847                 break;
 848
 849         default:
 850                 assert_not_reached("Received invalid RTNL message type");
 851         }
 852
 853         return 1;
 854 }
 855
 856 static int systemd_netlink_fd(void) {
 857         int n, fd, rtnl_fd = -EINVAL;
 858
 859         n = sd_listen_fds(true);
 860         if (n <= 0)
 861                 return -EINVAL;
 862
 863         for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++) {
 864                 if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) {
 865                         if (rtnl_fd >= 0)
 866                                 return -EINVAL;
 867
 868                         rtnl_fd = fd;
 869                 }
 870         }
 871
 872         return rtnl_fd;
 873 }
 874
 875 static int manager_connect_genl(Manager *m) {
 876         int r;
 877
 878         assert(m);
 879
 880         r = sd_genl_socket_open(&m->genl);
 881         if (r < 0)
 882                 return r;
 883
 884         r = sd_netlink_inc_rcvbuf(m->genl, RCVBUF_SIZE);
 885         if (r < 0)
 886                 return r;
 887
 888         r = sd_netlink_attach_event(m->genl, m->event, 0);
 889         if (r < 0)
 890                 return r;
 891
 892         return 0;
 893 }
 894
 895 static int manager_connect_rtnl(Manager *m) {
 896         int fd, r;
 897
 898         assert(m);
 899
 900         fd = systemd_netlink_fd();
 901         if (fd < 0)
 902                 r = sd_netlink_open(&m->rtnl);
 903         else
 904                 r = sd_netlink_open_fd(&m->rtnl, fd);
 905         if (r < 0)
 906                 return r;
 907
 908         r = sd_netlink_inc_rcvbuf(m->rtnl, RCVBUF_SIZE);
 909         if (r < 0)
 910                 return r;
 911
 912         r = sd_netlink_attach_event(m->rtnl, m->event, 0);
 913         if (r < 0)
 914                 return r;
 915
 916         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link");
 917         if (r < 0)
 918                 return r;
 919
 920         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link");
 921         if (r < 0)
 922                 return r;
 923
 924         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address");
 925         if (r < 0)
 926                 return r;
 927
 928         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address");
 929         if (r < 0)
 930                 return r;
 931
 932         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route");
 933         if (r < 0)
 934                 return r;
 935
 936         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route");
 937         if (r < 0)
 938                 return r;
 939
 940         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule");
 941         if (r < 0)
 942                 return r;
 943
 944         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule");
 945         if (r < 0)
 946                 return r;
 947
 948         return 0;
 949 }
 950
 951 static int ordered_set_put_in_addr_data(OrderedSet *s, const struct in_addr_data *address) {
 952         char *p;
 953         int r;
 954
 955         assert(s);
 956         assert(address);
 957
 958         r = in_addr_to_string(address->family, &address->address, &p);
 959         if (r < 0)
 960                 return r;
 961
 962         r = ordered_set_consume(s, p);
 963         if (r == -EEXIST)
 964                 return 0;
 965
 966         return r;
 967 }
 968
 969 static int ordered_set_put_in_addr_datav(OrderedSet *s, const struct in_addr_data *addresses, unsigned n) {
 970         int r, c = 0;
 971         unsigned i;
 972
 973         assert(s);
 974         assert(addresses || n == 0);
 975
 976         for (i = 0; i < n; i++) {
 977                 r = ordered_set_put_in_addr_data(s, addresses+i);
 978                 if (r < 0)
 979                         return r;
 980
 981                 c += r;
 982         }
 983
 984         return c;
 985 }
 986
 987 static int ordered_set_put_in4_addr(OrderedSet *s, const struct in_addr *address) {
 988         char *p;
 989         int r;
 990
 991         assert(s);
 992         assert(address);
 993
 994         r = in_addr_to_string(AF_INET, (const union in_addr_union*) address, &p);
 995         if (r < 0)
 996                 return r;
 997
 998         r = ordered_set_consume(s, p);
 999         if (r == -EEXIST)
1000                 return 0;
1001
1002         return r;
1003 }
1004
1005 static int ordered_set_put_in4_addrv(OrderedSet *s, const struct in_addr *addresses, unsigned n) {
1006         int r, c = 0;
1007         unsigned i;
1008
1009         assert(s);
1010         assert(n == 0 || addresses);
1011
1012         for (i = 0; i < n; i++) {
1013                 r = ordered_set_put_in4_addr(s, addresses+i);
1014                 if (r < 0)
1015                         return r;
1016
1017                 c += r;
1018         }
1019
1020         return c;
1021 }
1022
1023 static void print_string_set(FILE *f, const char *field, OrderedSet *s) {
1024         bool space = false;
1025         Iterator i;
1026         char *p;
1027
1028         if (ordered_set_isempty(s))
1029                 return;
1030
1031         fputs(field, f);
1032
1033         ORDERED_SET_FOREACH(p, s, i)
1034                 fputs_with_space(f, p, NULL, &space);
1035
1036         fputc('\n', f);
1037 }
1038
1039 static int manager_save(Manager *m) {
1040         _cleanup_ordered_set_free_free_ OrderedSet *dns = NULL, *ntp = NULL, *search_domains = NULL, *route_domains = NULL;
1041         Link *link;
1042         Iterator i;
1043         _cleanup_free_ char *temp_path = NULL;
1044         _cleanup_fclose_ FILE *f = NULL;
1045         LinkOperationalState operstate = LINK_OPERSTATE_OFF;
1046         const char *operstate_str;
1047         int r;
1048
1049         assert(m);
1050         assert(m->state_file);
1051
1052         /* We add all NTP and DNS server to a set, to filter out duplicates */
1053         dns = ordered_set_new(&string_hash_ops);
1054         if (!dns)
1055                 return -ENOMEM;
1056
1057         ntp = ordered_set_new(&string_hash_ops);
1058         if (!ntp)
1059                 return -ENOMEM;
1060
1061         search_domains = ordered_set_new(&dns_name_hash_ops);
1062         if (!search_domains)
1063                 return -ENOMEM;
1064
1065         route_domains = ordered_set_new(&dns_name_hash_ops);
1066         if (!route_domains)
1067                 return -ENOMEM;
1068
1069         HASHMAP_FOREACH(link, m->links, i) {
1070                 if (link->flags & IFF_LOOPBACK)
1071                         continue;
1072
1073                 if (link->operstate > operstate)
1074                         operstate = link->operstate;
1075
1076                 if (!link->network)
1077                         continue;
1078
1079                 /* First add the static configured entries */
1080                 r = ordered_set_put_in_addr_datav(dns, link->network->dns, link->network->n_dns);
1081                 if (r < 0)
1082                         return r;
1083
1084                 r = ordered_set_put_strdupv(ntp, link->network->ntp);
1085                 if (r < 0)
1086                         return r;
1087
1088                 r = ordered_set_put_strdupv(search_domains, link->network->search_domains);
1089                 if (r < 0)
1090                         return r;
1091
1092                 r = ordered_set_put_strdupv(route_domains, link->network->route_domains);
1093                 if (r < 0)
1094                         return r;
1095
1096                 if (!link->dhcp_lease)
1097                         continue;
1098
1099                 /* Secondly, add the entries acquired via DHCP */
1100                 if (link->network->dhcp_use_dns) {
1101                         const struct in_addr *addresses;
1102
1103                         r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
1104                         if (r > 0) {
1105                                 r = ordered_set_put_in4_addrv(dns, addresses, r);
1106                                 if (r < 0)
1107                                         return r;
1108                         } else if (r < 0 && r != -ENODATA)
1109                                 return r;
1110                 }
1111
1112                 if (link->network->dhcp_use_ntp) {
1113                         const struct in_addr *addresses;
1114
1115                         r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
1116                         if (r > 0) {
1117                                 r = ordered_set_put_in4_addrv(ntp, addresses, r);
1118                                 if (r < 0)
1119                                         return r;
1120                         } else if (r < 0 && r != -ENODATA)
1121                                 return r;
1122                 }
1123
1124                 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
1125                         const char *domainname;
1126                         char **domains = NULL;
1127
1128                         OrderedSet *target_domains = (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) ? search_domains : route_domains;
1129                         r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname);
1130                         if (r >= 0) {
1131                                 r = ordered_set_put_strdup(target_domains, domainname);
1132                                 if (r < 0)
1133                                         return r;
1134                         } else if (r != -ENODATA)
1135                                 return r;
1136
1137                         r = sd_dhcp_lease_get_search_domains(link->dhcp_lease, &domains);
1138                         if (r >= 0) {
1139                                 r = ordered_set_put_strdupv(target_domains, domains);
1140                                 if (r < 0)
1141                                         return r;
1142                         } else if (r != -ENODATA)
1143                                 return r;
1144                 }
1145         }
1146
1147         operstate_str = link_operstate_to_string(operstate);
1148         assert(operstate_str);
1149
1150         r = fopen_temporary(m->state_file, &f, &temp_path);
1151         if (r < 0)
1152                 return r;
1153
1154         (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
1155         (void) fchmod(fileno(f), 0644);
1156
1157         fprintf(f,
1158                 "# This is private data. Do not parse.\n"
1159                 "OPER_STATE=%s\n", operstate_str);
1160
1161         print_string_set(f, "DNS=", dns);
1162         print_string_set(f, "NTP=", ntp);
1163         print_string_set(f, "DOMAINS=", search_domains);
1164         print_string_set(f, "ROUTE_DOMAINS=", route_domains);
1165
1166         r = routing_policy_serialize_rules(m->rules, f);
1167         if (r < 0)
1168                 goto fail;
1169
1170         r = fflush_and_check(f);
1171         if (r < 0)
1172                 goto fail;
1173
1174         if (rename(temp_path, m->state_file) < 0) {
1175                 r = -errno;
1176                 goto fail;
1177         }
1178
1179         if (m->operational_state != operstate) {
1180                 m->operational_state = operstate;
1181                 r = manager_send_changed(m, "OperationalState", NULL);
1182                 if (r < 0)
1183                         log_error_errno(r, "Could not emit changed OperationalState: %m");
1184         }
1185
1186         m->dirty = false;
1187
1188         return 0;
1189
1190 fail:
1191         (void) unlink(m->state_file);
1192         (void) unlink(temp_path);
1193
1194         return log_error_errno(r, "Failed to save network state to %s: %m", m->state_file);
1195 }
1196
1197 static int manager_dirty_handler(sd_event_source *s, void *userdata) {
1198         Manager *m = userdata;
1199         Link *link;
1200         Iterator i;
1201
1202         assert(m);
1203
1204         if (m->dirty)
1205                 manager_save(m);
1206
1207         SET_FOREACH(link, m->dirty_links, i)
1208                 if (link_save(link) >= 0)
1209                         link_clean(link);
1210
1211         return 1;
1212 }
1213
1214 Link *manager_dhcp6_prefix_get(Manager *m, struct in6_addr *addr) {
1215         assert_return(m, NULL);
1216         assert_return(addr, NULL);
1217
1218         return hashmap_get(m->dhcp6_prefixes, addr);
1219 }
1220
1221 static int dhcp6_route_add_handler(sd_netlink *nl, sd_netlink_message *m, void *userdata) {
1222         Link *link = userdata;
1223         int r;
1224
1225         assert(link);
1226
1227         r = sd_netlink_message_get_errno(m);
1228         if (r < 0 && r != -EEXIST)
1229                 log_link_debug_errno(link, r, "Received error adding DHCPv6 Prefix Delegation route: %m");
1230
1231         return 0;
1232 }
1233
1234 static void dhcp6_prefixes_hash_func(const void *p, struct siphash *state) {
1235         const struct in6_addr *addr = p;
1236
1237         assert(p);
1238
1239         siphash24_compress(addr, sizeof(*addr), state);
1240 }
1241
1242 static int dhcp6_prefixes_compare_func(const void *_a, const void *_b) {
1243         const struct in6_addr *a = _a, *b = _b;
1244
1245         return memcmp(a, b, sizeof(*a));
1246 }
1247
1248 static const struct hash_ops dhcp6_prefixes_hash_ops = {
1249         .hash = dhcp6_prefixes_hash_func,
1250         .compare = dhcp6_prefixes_compare_func,
1251 };
1252
1253 int manager_dhcp6_prefix_add(Manager *m, struct in6_addr *addr, Link *link) {
1254         _cleanup_free_ char *buf = NULL;
1255         Route *route;
1256         int r;
1257
1258         assert_return(m, -EINVAL);
1259         assert_return(addr, -EINVAL);
1260
1261         r = route_add(link, AF_INET6, (union in_addr_union *) addr, 64,
1262                       0, 0, 0, &route);
1263         if (r < 0)
1264                 return r;
1265
1266         r = route_configure(route, link, dhcp6_route_add_handler);
1267         if (r < 0)
1268                 return r;
1269
1270         (void) in_addr_to_string(AF_INET6, (union in_addr_union *) addr, &buf);
1271         log_link_debug(link, "Adding prefix route %s/64", strnull(buf));
1272
1273         r = hashmap_ensure_allocated(&m->dhcp6_prefixes, &dhcp6_prefixes_hash_ops);
1274         if (r < 0)
1275                 return r;
1276
1277         return hashmap_put(m->dhcp6_prefixes, addr, link);
1278 }
1279
1280 static int dhcp6_route_remove_handler(sd_netlink *nl, sd_netlink_message *m, void *userdata) {
1281         Link *link = userdata;
1282         int r;
1283
1284         assert(link);
1285
1286         r = sd_netlink_message_get_errno(m);
1287         if (r < 0)
1288                 log_link_debug_errno(link, r, "Received error on DHCPv6 Prefix Delegation route removal: %m");
1289
1290         return 1;
1291 }
1292
1293 static int manager_dhcp6_prefix_remove(Manager *m, struct in6_addr *addr) {
1294         _cleanup_free_ char *buf = NULL;
1295         Route *route;
1296         Link *l;
1297         int r;
1298
1299         assert_return(m, -EINVAL);
1300         assert_return(addr, -EINVAL);
1301
1302         l = hashmap_remove(m->dhcp6_prefixes, addr);
1303         if (!l)
1304                 return -EINVAL;
1305
1306         (void) sd_radv_remove_prefix(l->radv, addr, 64);
1307         r = route_get(l, AF_INET6, (union in_addr_union *) addr, 64,
1308                       0, 0, 0, &route);
1309         if (r < 0)
1310                 return r;
1311
1312         r = route_remove(route, l, dhcp6_route_remove_handler);
1313         if (r < 0)
1314                 return r;
1315
1316         (void) in_addr_to_string(AF_INET6, (union in_addr_union *) addr, &buf);
1317         log_link_debug(l, "Removing prefix route %s/64", strnull(buf));
1318
1319         return 0;
1320 }
1321
1322 int manager_dhcp6_prefix_remove_all(Manager *m, Link *link) {
1323         struct in6_addr *addr;
1324         Iterator i;
1325         Link *l;
1326
1327         assert_return(m, -EINVAL);
1328         assert_return(link, -EINVAL);
1329
1330         HASHMAP_FOREACH_KEY(l, addr, m->dhcp6_prefixes, i) {
1331                 if (l != link)
1332                         continue;
1333
1334                 (void) manager_dhcp6_prefix_remove(m, addr);
1335         }
1336
1337         return 0;
1338 }
1339
1340 int manager_new(Manager **ret) {
1341         _cleanup_(manager_freep) Manager *m = NULL;
1342         int r;
1343
1344         m = new0(Manager, 1);
1345         if (!m)
1346                 return -ENOMEM;
1347
1348         m->state_file = strdup("/run/systemd/netif/state");
1349         if (!m->state_file)
1350                 return -ENOMEM;
1351
1352         r = sd_event_default(&m->event);
1353         if (r < 0)
1354                 return r;
1355
1356         (void) sd_event_set_watchdog(m->event, true);
1357         (void) sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL);
1358         (void) sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);
1359
1360         r = sd_event_add_post(m->event, NULL, manager_dirty_handler, m);
1361         if (r < 0)
1362                 return r;
1363
1364         r = manager_connect_rtnl(m);
1365         if (r < 0)
1366                 return r;
1367
1368         r = manager_connect_genl(m);
1369         if (r < 0)
1370                 return r;
1371
1372         r = manager_connect_udev(m);
1373         if (r < 0)
1374                 return r;
1375
1376         LIST_HEAD_INIT(m->networks);
1377
1378         r = sd_resolve_default(&m->resolve);
1379         if (r < 0)
1380                 return r;
1381
1382         r = sd_resolve_attach_event(m->resolve, m->event, 0);
1383         if (r < 0)
1384                 return r;
1385
1386         r = setup_default_address_pool(m);
1387         if (r < 0)
1388                 return r;
1389
1390         m->duid.type = DUID_TYPE_EN;
1391
1392         (void) routing_policy_load_rules(m->state_file, &m->rules_saved);
1393
1394         *ret = TAKE_PTR(m);
1395
1396         return 0;
1397 }
1398
1399 void manager_free(Manager *m) {
1400         AddressPool *pool;
1401         Network *network;
1402         Link *link;
1403
1404         if (!m)
1405                 return;
1406
1407         free(m->state_file);
1408
1409         sd_netlink_unref(m->rtnl);
1410         sd_netlink_unref(m->genl);
1411         sd_resolve_unref(m->resolve);
1412
1413         while ((network = m->networks))
1414                 network_free(network);
1415
1416         while ((link = hashmap_first(m->dhcp6_prefixes)))
1417                 manager_dhcp6_prefix_remove_all(m, link);
1418         hashmap_free(m->dhcp6_prefixes);
1419
1420         while ((link = hashmap_steal_first(m->links))) {
1421                 if (link->dhcp6_client)
1422                         (void) dhcp6_lease_pd_prefix_lost(link->dhcp6_client, link);
1423                 link_unref(link);
1424         }
1425
1426         m->dirty_links = set_free_with_destructor(m->dirty_links, link_unref);
1427         m->links = hashmap_free(m->links);
1428         m->links_requesting_uuid = set_free(m->links_requesting_uuid);
1429         set_free(m->duids_requesting_uuid);
1430
1431         hashmap_free(m->networks_by_name);
1432
1433         m->netdevs = hashmap_free_with_destructor(m->netdevs, netdev_unref);
1434
1435         while ((pool = m->address_pools))
1436                 address_pool_free(pool);
1437
1438         /* routing_policy_rule_free() access m->rules and m->rules_foreign.
1439          * So, it is necessary to set NULL after the sets are freed. */
1440         m->rules = set_free_with_destructor(m->rules, routing_policy_rule_free);
1441         m->rules_foreign = set_free_with_destructor(m->rules_foreign, routing_policy_rule_free);
1442         set_free_with_destructor(m->rules_saved, routing_policy_rule_free);
1443
1444         sd_event_unref(m->event);
1445
1446         sd_device_monitor_unref(m->device_monitor);
1447
1448         sd_bus_unref(m->bus);
1449
1450         free(m->dynamic_timezone);
1451         free(m->dynamic_hostname);
1452
1453         free(m);
1454 }
1455
1456 int manager_start(Manager *m) {
1457         Link *link;
1458         Iterator i;
1459
1460         assert(m);
1461
1462         /* The dirty handler will deal with future serialization, but the first one
1463            must be done explicitly. */
1464
1465         manager_save(m);
1466
1467         HASHMAP_FOREACH(link, m->links, i)
1468                 link_save(link);
1469
1470         return 0;
1471 }
1472
1473 int manager_load_config(Manager *m) {
1474         int r;
1475
1476         /* update timestamp */
1477         paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, true);
1478
1479         r = netdev_load(m);
1480         if (r < 0)
1481                 return r;
1482
1483         r = network_load(m);
1484         if (r < 0)
1485                 return r;
1486
1487         return 0;
1488 }
1489
1490 bool manager_should_reload(Manager *m) {
1491         return paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, false);
1492 }
1493
1494 int manager_rtnl_enumerate_links(Manager *m) {
1495         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1496         sd_netlink_message *link;
1497         int r;
1498
1499         assert(m);
1500         assert(m->rtnl);
1501
1502         r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);
1503         if (r < 0)
1504                 return r;
1505
1506         r = sd_netlink_message_request_dump(req, true);
1507         if (r < 0)
1508                 return r;
1509
1510         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1511         if (r < 0)
1512                 return r;
1513
1514         for (link = reply; link; link = sd_netlink_message_next(link)) {
1515                 int k;
1516
1517                 m->enumerating = true;
1518
1519                 k = manager_rtnl_process_link(m->rtnl, link, m);
1520                 if (k < 0)
1521                         r = k;
1522
1523                 m->enumerating = false;
1524         }
1525
1526         return r;
1527 }
1528
1529 int manager_rtnl_enumerate_addresses(Manager *m) {
1530         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1531         sd_netlink_message *addr;
1532         int r;
1533
1534         assert(m);
1535         assert(m->rtnl);
1536
1537         r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, 0);
1538         if (r < 0)
1539                 return r;
1540
1541         r = sd_netlink_message_request_dump(req, true);
1542         if (r < 0)
1543                 return r;
1544
1545         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1546         if (r < 0)
1547                 return r;
1548
1549         for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
1550                 int k;
1551
1552                 m->enumerating = true;
1553
1554                 k = manager_rtnl_process_address(m->rtnl, addr, m);
1555                 if (k < 0)
1556                         r = k;
1557
1558                 m->enumerating = false;
1559         }
1560
1561         return r;
1562 }
1563
1564 int manager_rtnl_enumerate_routes(Manager *m) {
1565         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1566         sd_netlink_message *route;
1567         int r;
1568
1569         assert(m);
1570         assert(m->rtnl);
1571
1572         r = sd_rtnl_message_new_route(m->rtnl, &req, RTM_GETROUTE, 0, 0);
1573         if (r < 0)
1574                 return r;
1575
1576         r = sd_netlink_message_request_dump(req, true);
1577         if (r < 0)
1578                 return r;
1579
1580         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1581         if (r < 0)
1582                 return r;
1583
1584         for (route = reply; route; route = sd_netlink_message_next(route)) {
1585                 int k;
1586
1587                 m->enumerating = true;
1588
1589                 k = manager_rtnl_process_route(m->rtnl, route, m);
1590                 if (k < 0)
1591                         r = k;
1592
1593                 m->enumerating = false;
1594         }
1595
1596         return r;
1597 }
1598
1599 int manager_rtnl_enumerate_rules(Manager *m) {
1600         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1601         sd_netlink_message *rule;
1602         int r;
1603
1604         assert(m);
1605         assert(m->rtnl);
1606
1607         r = sd_rtnl_message_new_routing_policy_rule(m->rtnl, &req, RTM_GETRULE, 0);
1608         if (r < 0)
1609                 return r;
1610
1611         r = sd_netlink_message_request_dump(req, true);
1612         if (r < 0)
1613                 return r;
1614
1615         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1616         if (r < 0) {
1617                 if (r == -EOPNOTSUPP) {
1618                         log_debug("FIB Rules are not supported by the kernel. Ignoring.");
1619                         return 0;
1620                 }
1621
1622                 return r;
1623         }
1624
1625         for (rule = reply; rule; rule = sd_netlink_message_next(rule)) {
1626                 int k;
1627
1628                 m->enumerating = true;
1629
1630                 k = manager_rtnl_process_rule(m->rtnl, rule, m);
1631                 if (k < 0)
1632                         r = k;
1633
1634                 m->enumerating = false;
1635         }
1636
1637         return r;
1638 }
1639
1640 int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, union in_addr_union *found) {
1641         AddressPool *p;
1642         int r;
1643
1644         assert(m);
1645         assert(prefixlen > 0);
1646         assert(found);
1647
1648         LIST_FOREACH(address_pools, p, m->address_pools) {
1649                 if (p->family != family)
1650                         continue;
1651
1652                 r = address_pool_acquire(p, prefixlen, found);
1653                 if (r != 0)
1654                         return r;
1655         }
1656
1657         return 0;
1658 }
1659
1660 Link* manager_find_uplink(Manager *m, Link *exclude) {
1661         _cleanup_free_ struct local_address *gateways = NULL;
1662         int n, i;
1663
1664         assert(m);
1665
1666         /* Looks for a suitable "uplink", via black magic: an
1667          * interface that is up and where the default route with the
1668          * highest priority points to. */
1669
1670         n = local_gateways(m->rtnl, 0, AF_UNSPEC, &gateways);
1671         if (n < 0) {
1672                 log_warning_errno(n, "Failed to determine list of default gateways: %m");
1673                 return NULL;
1674         }
1675
1676         for (i = 0; i < n; i++) {
1677                 Link *link;
1678
1679                 link = hashmap_get(m->links, INT_TO_PTR(gateways[i].ifindex));
1680                 if (!link) {
1681                         log_debug("Weird, found a gateway for a link we don't know. Ignoring.");
1682                         continue;
1683                 }
1684
1685                 if (link == exclude)
1686                         continue;
1687
1688                 if (link->operstate < LINK_OPERSTATE_ROUTABLE)
1689                         continue;
1690
1691                 return link;
1692         }
1693
1694         return NULL;
1695 }
1696
1697 void manager_dirty(Manager *manager) {
1698         assert(manager);
1699
1700         /* the serialized state in /run is no longer up-to-date */
1701         manager->dirty = true;
1702 }
1703
1704 static int set_hostname_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
1705         Manager *manager = userdata;
1706         const sd_bus_error *e;
1707
1708         assert(m);
1709         assert(manager);
1710
1711         e = sd_bus_message_get_error(m);
1712         if (e)
1713                 log_warning_errno(sd_bus_error_get_errno(e), "Could not set hostname: %s", e->message);
1714
1715         return 1;
1716 }
1717
1718 int manager_set_hostname(Manager *m, const char *hostname) {
1719         int r;
1720
1721         log_debug("Setting transient hostname: '%s'", strna(hostname));
1722
1723         if (free_and_strdup(&m->dynamic_hostname, hostname) < 0)
1724                 return log_oom();
1725
1726         if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
1727                 log_debug("Not connected to system bus, setting hostname later.");
1728                 return 0;
1729         }
1730
1731         r = sd_bus_call_method_async(
1732                         m->bus,
1733                         NULL,
1734                         "org.freedesktop.hostname1",
1735                         "/org/freedesktop/hostname1",
1736                         "org.freedesktop.hostname1",
1737                         "SetHostname",
1738                         set_hostname_handler,
1739                         m,
1740                         "sb",
1741                         hostname,
1742                         false);
1743
1744         if (r < 0)
1745                 return log_error_errno(r, "Could not set transient hostname: %m");
1746
1747         return 0;
1748 }
1749
1750 static int set_timezone_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
1751         Manager *manager = userdata;
1752         const sd_bus_error *e;
1753
1754         assert(m);
1755         assert(manager);
1756
1757         e = sd_bus_message_get_error(m);
1758         if (e)
1759                 log_warning_errno(sd_bus_error_get_errno(e), "Could not set timezone: %s", e->message);
1760
1761         return 1;
1762 }
1763
1764 int manager_set_timezone(Manager *m, const char *tz) {
1765         int r;
1766
1767         assert(m);
1768         assert(tz);
1769
1770         log_debug("Setting system timezone: '%s'", tz);
1771         if (free_and_strdup(&m->dynamic_timezone, tz) < 0)
1772                 return log_oom();
1773
1774         if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
1775                 log_debug("Not connected to system bus, setting timezone later.");
1776                 return 0;
1777         }
1778
1779         r = sd_bus_call_method_async(
1780                         m->bus,
1781                         NULL,
1782                         "org.freedesktop.timedate1",
1783                         "/org/freedesktop/timedate1",
1784                         "org.freedesktop.timedate1",
1785                         "SetTimezone",
1786                         set_timezone_handler,
1787                         m,
1788                         "sb",
1789                         tz,
1790                         false);
1791         if (r < 0)
1792                 return log_error_errno(r, "Could not set timezone: %m");
1793
1794         return 0;
1795 }
1796
1797 int manager_request_product_uuid(Manager *m, Link *link) {
1798         int r;
1799
1800         assert(m);
1801
1802         if (m->has_product_uuid)
1803                 return 0;
1804
1805         log_debug("Requesting product UUID");
1806
1807         if (link) {
1808                 DUID *duid;
1809
1810                 assert_se(duid = link_get_duid(link));
1811
1812                 r = set_ensure_allocated(&m->links_requesting_uuid, NULL);
1813                 if (r < 0)
1814                         return log_oom();
1815
1816                 r = set_ensure_allocated(&m->duids_requesting_uuid, NULL);
1817                 if (r < 0)
1818                         return log_oom();
1819
1820                 r = set_put(m->links_requesting_uuid, link);
1821                 if (r < 0)
1822                         return log_oom();
1823
1824                 r = set_put(m->duids_requesting_uuid, duid);
1825                 if (r < 0)
1826                         return log_oom();
1827         }
1828
1829         if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
1830                 log_debug("Not connected to system bus, requesting product UUID later.");
1831                 return 0;
1832         }
1833
1834         r = sd_bus_call_method_async(
1835                         m->bus,
1836                         NULL,
1837                         "org.freedesktop.hostname1",
1838                         "/org/freedesktop/hostname1",
1839                         "org.freedesktop.hostname1",
1840                         "GetProductUUID",
1841                         get_product_uuid_handler,
1842                         m,
1843                         "b",
1844                         false);
1845         if (r < 0)
1846                 return log_warning_errno(r, "Failed to get product UUID: %m");
1847
1848         return 0;
1849 }