src/network/networkd-manager.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <netinet/in.h>
   4 #include <sys/socket.h>
   5 #include <unistd.h>
   6 #include <linux/if.h>
   7 #include <linux/fib_rules.h>
   8 #include <linux/nexthop.h>
   9
  10 #include "sd-daemon.h"
  11 #include "sd-netlink.h"
  12
  13 #include "alloc-util.h"
  14 #include "bus-util.h"
  15 #include "conf-parser.h"
  16 #include "def.h"
  17 #include "device-private.h"
  18 #include "device-util.h"
  19 #include "dns-domain.h"
  20 #include "fd-util.h"
  21 #include "fileio.h"
  22 #include "local-addresses.h"
  23 #include "netlink-util.h"
  24 #include "network-internal.h"
  25 #include "networkd-dhcp6.h"
  26 #include "networkd-link-bus.h"
  27 #include "networkd-manager-bus.h"
  28 #include "networkd-manager.h"
  29 #include "networkd-network-bus.h"
  30 #include "networkd-speed-meter.h"
  31 #include "ordered-set.h"
  32 #include "path-util.h"
  33 #include "set.h"
  34 #include "signal-util.h"
  35 #include "strv.h"
  36 #include "sysctl-util.h"
  37 #include "tmpfile-util.h"
  38 #include "udev-util.h"
  39 #include "virt.h"
  40
  41 /* use 8 MB for receive socket kernel queue. */
  42 #define RCVBUF_SIZE    (8*1024*1024)
  43
  44 static int log_message_warning_errno(sd_netlink_message *m, int err, const char *msg) {
  45         const char *err_msg = NULL;
  46
  47         (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
  48         return log_warning_errno(err, "%s: %s%s%m", msg, strempty(err_msg), err_msg ? " " : "");
  49 }
  50
  51 static int setup_default_address_pool(Manager *m) {
  52         AddressPool *p;
  53         int r;
  54
  55         assert(m);
  56
  57         /* Add in the well-known private address ranges. */
  58
  59         r = address_pool_new_from_string(m, &p, AF_INET6, "fd00::", 8);
  60         if (r < 0)
  61                 return r;
  62
  63         r = address_pool_new_from_string(m, &p, AF_INET, "10.0.0.0", 8);
  64         if (r < 0)
  65                 return r;
  66
  67         r = address_pool_new_from_string(m, &p, AF_INET, "172.16.0.0", 12);
  68         if (r < 0)
  69                 return r;
  70
  71         r = address_pool_new_from_string(m, &p, AF_INET, "192.168.0.0", 16);
  72         if (r < 0)
  73                 return r;
  74
  75         return 0;
  76 }
  77
  78 static int manager_reset_all(Manager *m) {
  79         Link *link;
  80         Iterator i;
  81         int r;
  82
  83         assert(m);
  84
  85         HASHMAP_FOREACH(link, m->links, i) {
  86                 r = link_carrier_reset(link);
  87                 if (r < 0)
  88                         log_link_warning_errno(link, r, "Could not reset carrier: %m");
  89         }
  90
  91         return 0;
  92 }
  93
  94 static int match_prepare_for_sleep(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
  95         Manager *m = userdata;
  96         int b, r;
  97
  98         assert(message);
  99         assert(m);
 100
 101         r = sd_bus_message_read(message, "b", &b);
 102         if (r < 0) {
 103                 log_debug_errno(r, "Failed to parse PrepareForSleep signal: %m");
 104                 return 0;
 105         }
 106
 107         if (b)
 108                 return 0;
 109
 110         log_debug("Coming back from suspend, resetting all connections...");
 111
 112         (void) manager_reset_all(m);
 113
 114         return 0;
 115 }
 116
 117 static int on_connected(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
 118         Manager *m = userdata;
 119
 120         assert(message);
 121         assert(m);
 122
 123         /* Did we get a timezone or transient hostname from DHCP while D-Bus wasn't up yet? */
 124         if (m->dynamic_hostname)
 125                 (void) manager_set_hostname(m, m->dynamic_hostname);
 126         if (m->dynamic_timezone)
 127                 (void) manager_set_timezone(m, m->dynamic_timezone);
 128         if (m->links_requesting_uuid)
 129                 (void) manager_request_product_uuid(m, NULL);
 130
 131         return 0;
 132 }
 133
 134 int manager_connect_bus(Manager *m) {
 135         int r;
 136
 137         assert(m);
 138
 139         if (m->bus)
 140                 return 0;
 141
 142         r = bus_open_system_watch_bind_with_description(&m->bus, "bus-api-network");
 143         if (r < 0)
 144                 return log_error_errno(r, "Failed to connect to bus: %m");
 145
 146         r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/network1", "org.freedesktop.network1.Manager", manager_vtable, m);
 147         if (r < 0)
 148                 return log_error_errno(r, "Failed to add manager object vtable: %m");
 149
 150         r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/link", "org.freedesktop.network1.Link", link_vtable, link_object_find, m);
 151         if (r < 0)
 152                return log_error_errno(r, "Failed to add link object vtable: %m");
 153
 154         r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/link", link_node_enumerator, m);
 155         if (r < 0)
 156                 return log_error_errno(r, "Failed to add link enumerator: %m");
 157
 158         r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/network", "org.freedesktop.network1.Network", network_vtable, network_object_find, m);
 159         if (r < 0)
 160                return log_error_errno(r, "Failed to add network object vtable: %m");
 161
 162         r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/network", network_node_enumerator, m);
 163         if (r < 0)
 164                 return log_error_errno(r, "Failed to add network enumerator: %m");
 165
 166         r = sd_bus_request_name_async(m->bus, NULL, "org.freedesktop.network1", 0, NULL, NULL);
 167         if (r < 0)
 168                 return log_error_errno(r, "Failed to request name: %m");
 169
 170         r = sd_bus_attach_event(m->bus, m->event, 0);
 171         if (r < 0)
 172                 return log_error_errno(r, "Failed to attach bus to event loop: %m");
 173
 174         r = sd_bus_match_signal_async(
 175                         m->bus,
 176                         NULL,
 177                         "org.freedesktop.DBus.Local",
 178                         NULL,
 179                         "org.freedesktop.DBus.Local",
 180                         "Connected",
 181                         on_connected, NULL, m);
 182         if (r < 0)
 183                 return log_error_errno(r, "Failed to request match on Connected signal: %m");
 184
 185         r = sd_bus_match_signal_async(
 186                         m->bus,
 187                         NULL,
 188                         "org.freedesktop.login1",
 189                         "/org/freedesktop/login1",
 190                         "org.freedesktop.login1.Manager",
 191                         "PrepareForSleep",
 192                         match_prepare_for_sleep, NULL, m);
 193         if (r < 0)
 194                 log_warning_errno(r, "Failed to request match for PrepareForSleep, ignoring: %m");
 195
 196         return 0;
 197 }
 198
 199 static int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) {
 200         Manager *m = userdata;
 201         DeviceAction action;
 202         Link *link = NULL;
 203         int r, ifindex;
 204
 205         assert(m);
 206         assert(device);
 207
 208         r = device_get_action(device, &action);
 209         if (r < 0) {
 210                 log_device_debug_errno(device, r, "Failed to get udev action, ignoring device: %m");
 211                 return 0;
 212         }
 213
 214         if (!IN_SET(action, DEVICE_ACTION_ADD, DEVICE_ACTION_CHANGE, DEVICE_ACTION_MOVE)) {
 215                 log_device_debug(device, "Ignoring udev %s event for device.", device_action_to_string(action));
 216                 return 0;
 217         }
 218
 219         r = sd_device_get_ifindex(device, &ifindex);
 220         if (r < 0) {
 221                 log_device_debug_errno(device, r, "Ignoring udev ADD event for device without ifindex or with invalid ifindex: %m");
 222                 return 0;
 223         }
 224
 225         r = device_is_renaming(device);
 226         if (r < 0) {
 227                 log_device_error_errno(device, r, "Failed to determine the device is renamed or not, ignoring '%s' uevent: %m",
 228                                        device_action_to_string(action));
 229                 return 0;
 230         }
 231         if (r > 0) {
 232                 log_device_debug(device, "Interface is under renaming, wait for the interface to be renamed: %m");
 233                 return 0;
 234         }
 235
 236         r = link_get(m, ifindex, &link);
 237         if (r < 0) {
 238                 if (r != -ENODEV)
 239                         log_debug_errno(r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
 240                 return 0;
 241         }
 242
 243         (void) link_initialized(link, device);
 244
 245         return 0;
 246 }
 247
 248 static int manager_connect_udev(Manager *m) {
 249         int r;
 250
 251         /* udev does not initialize devices inside containers,
 252          * so we rely on them being already initialized before
 253          * entering the container */
 254         if (detect_container() > 0)
 255                 return 0;
 256
 257         r = sd_device_monitor_new(&m->device_monitor);
 258         if (r < 0)
 259                 return log_error_errno(r, "Failed to initialize device monitor: %m");
 260
 261         r = sd_device_monitor_filter_add_match_subsystem_devtype(m->device_monitor, "net", NULL);
 262         if (r < 0)
 263                 return log_error_errno(r, "Could not add device monitor filter: %m");
 264
 265         r = sd_device_monitor_attach_event(m->device_monitor, m->event);
 266         if (r < 0)
 267                 return log_error_errno(r, "Failed to attach event to device monitor: %m");
 268
 269         r = sd_device_monitor_start(m->device_monitor, manager_udev_process_link, m);
 270         if (r < 0)
 271                 return log_error_errno(r, "Failed to start device monitor: %m");
 272
 273         return 0;
 274 }
 275
 276 int manager_rtnl_process_route(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 277         _cleanup_(route_freep) Route *tmp = NULL;
 278         Route *route = NULL;
 279         Manager *m = userdata;
 280         Link *link = NULL;
 281         uint32_t ifindex;
 282         uint16_t type;
 283         unsigned char table;
 284         int r;
 285
 286         assert(rtnl);
 287         assert(message);
 288         assert(m);
 289
 290         if (sd_netlink_message_is_error(message)) {
 291                 r = sd_netlink_message_get_errno(message);
 292                 if (r < 0)
 293                         log_message_warning_errno(message, r, "rtnl: failed to receive route message, ignoring");
 294
 295                 return 0;
 296         }
 297
 298         r = sd_netlink_message_get_type(message, &type);
 299         if (r < 0) {
 300                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
 301                 return 0;
 302         } else if (!IN_SET(type, RTM_NEWROUTE, RTM_DELROUTE)) {
 303                 log_warning("rtnl: received unexpected message type %u when processing route, ignoring.", type);
 304                 return 0;
 305         }
 306
 307         r = sd_netlink_message_read_u32(message, RTA_OIF, &ifindex);
 308         if (r == -ENODATA) {
 309                 log_debug("rtnl: received route message without ifindex, ignoring");
 310                 return 0;
 311         } else if (r < 0) {
 312                 log_warning_errno(r, "rtnl: could not get ifindex from route message, ignoring: %m");
 313                 return 0;
 314         } else if (ifindex <= 0) {
 315                 log_warning("rtnl: received route message with invalid ifindex %d, ignoring.", ifindex);
 316                 return 0;
 317         }
 318
 319         r = link_get(m, ifindex, &link);
 320         if (r < 0 || !link) {
 321                 /* when enumerating we might be out of sync, but we will
 322                  * get the route again, so just ignore it */
 323                 if (!m->enumerating)
 324                         log_warning("rtnl: received route message for link (%d) we do not know about, ignoring", ifindex);
 325                 return 0;
 326         }
 327
 328         r = route_new(&tmp);
 329         if (r < 0)
 330                 return log_oom();
 331
 332         r = sd_rtnl_message_route_get_family(message, &tmp->family);
 333         if (r < 0) {
 334                 log_link_warning(link, "rtnl: received route message without family, ignoring");
 335                 return 0;
 336         } else if (!IN_SET(tmp->family, AF_INET, AF_INET6)) {
 337                 log_link_debug(link, "rtnl: received route message with invalid family '%i', ignoring", tmp->family);
 338                 return 0;
 339         }
 340
 341         r = sd_rtnl_message_route_get_protocol(message, &tmp->protocol);
 342         if (r < 0) {
 343                 log_warning_errno(r, "rtnl: received route message without route protocol: %m");
 344                 return 0;
 345         }
 346
 347         switch (tmp->family) {
 348         case AF_INET:
 349                 r = sd_netlink_message_read_in_addr(message, RTA_DST, &tmp->dst.in);
 350                 if (r < 0 && r != -ENODATA) {
 351                         log_link_warning_errno(link, r, "rtnl: received route message without valid destination, ignoring: %m");
 352                         return 0;
 353                 }
 354
 355                 r = sd_netlink_message_read_in_addr(message, RTA_GATEWAY, &tmp->gw.in);
 356                 if (r < 0 && r != -ENODATA) {
 357                         log_link_warning_errno(link, r, "rtnl: received route message without valid gateway, ignoring: %m");
 358                         return 0;
 359                 }
 360
 361                 r = sd_netlink_message_read_in_addr(message, RTA_SRC, &tmp->src.in);
 362                 if (r < 0 && r != -ENODATA) {
 363                         log_link_warning_errno(link, r, "rtnl: received route message without valid source, ignoring: %m");
 364                         return 0;
 365                 }
 366
 367                 r = sd_netlink_message_read_in_addr(message, RTA_PREFSRC, &tmp->prefsrc.in);
 368                 if (r < 0 && r != -ENODATA) {
 369                         log_link_warning_errno(link, r, "rtnl: received route message without valid preferred source, ignoring: %m");
 370                         return 0;
 371                 }
 372
 373                 break;
 374
 375         case AF_INET6:
 376                 r = sd_netlink_message_read_in6_addr(message, RTA_DST, &tmp->dst.in6);
 377                 if (r < 0 && r != -ENODATA) {
 378                         log_link_warning_errno(link, r, "rtnl: received route message without valid destination, ignoring: %m");
 379                         return 0;
 380                 }
 381
 382                 r = sd_netlink_message_read_in6_addr(message, RTA_GATEWAY, &tmp->gw.in6);
 383                 if (r < 0 && r != -ENODATA) {
 384                         log_link_warning_errno(link, r, "rtnl: received route message without valid gateway, ignoring: %m");
 385                         return 0;
 386                 }
 387
 388                 r = sd_netlink_message_read_in6_addr(message, RTA_SRC, &tmp->src.in6);
 389                 if (r < 0 && r != -ENODATA) {
 390                         log_link_warning_errno(link, r, "rtnl: received route message without valid source, ignoring: %m");
 391                         return 0;
 392                 }
 393
 394                 r = sd_netlink_message_read_in6_addr(message, RTA_PREFSRC, &tmp->prefsrc.in6);
 395                 if (r < 0 && r != -ENODATA) {
 396                         log_link_warning_errno(link, r, "rtnl: received route message without valid preferred source, ignoring: %m");
 397                         return 0;
 398                 }
 399
 400                 break;
 401
 402         default:
 403                 assert_not_reached("Received route message with unsupported address family");
 404                 return 0;
 405         }
 406
 407         r = sd_rtnl_message_route_get_dst_prefixlen(message, &tmp->dst_prefixlen);
 408         if (r < 0) {
 409                 log_link_warning_errno(link, r, "rtnl: received route message with invalid destination prefixlen, ignoring: %m");
 410                 return 0;
 411         }
 412
 413         r = sd_rtnl_message_route_get_src_prefixlen(message, &tmp->src_prefixlen);
 414         if (r < 0) {
 415                 log_link_warning_errno(link, r, "rtnl: received route message with invalid source prefixlen, ignoring: %m");
 416                 return 0;
 417         }
 418
 419         r = sd_rtnl_message_route_get_scope(message, &tmp->scope);
 420         if (r < 0) {
 421                 log_link_warning_errno(link, r, "rtnl: received route message with invalid scope, ignoring: %m");
 422                 return 0;
 423         }
 424
 425         r = sd_rtnl_message_route_get_tos(message, &tmp->tos);
 426         if (r < 0) {
 427                 log_link_warning_errno(link, r, "rtnl: received route message with invalid tos, ignoring: %m");
 428                 return 0;
 429         }
 430
 431         r = sd_rtnl_message_route_get_type(message, &tmp->type);
 432         if (r < 0) {
 433                 log_link_warning_errno(link, r, "rtnl: received route message with invalid type, ignoring: %m");
 434                 return 0;
 435         }
 436
 437         r = sd_rtnl_message_route_get_table(message, &table);
 438         if (r < 0) {
 439                 log_link_warning_errno(link, r, "rtnl: received route message with invalid table, ignoring: %m");
 440                 return 0;
 441         }
 442         tmp->table = table;
 443
 444         r = sd_netlink_message_read_u32(message, RTA_PRIORITY, &tmp->priority);
 445         if (r < 0 && r != -ENODATA) {
 446                 log_link_warning_errno(link, r, "rtnl: received route message with invalid priority, ignoring: %m");
 447                 return 0;
 448         }
 449
 450         r = sd_netlink_message_enter_container(message, RTA_METRICS);
 451         if (r < 0 && r != -ENODATA) {
 452                 log_link_error_errno(link, r, "rtnl: Could not enter RTA_METRICS container: %m");
 453                 return 0;
 454         }
 455         if (r >= 0) {
 456                 r = sd_netlink_message_read_u32(message, RTAX_INITCWND, &tmp->initcwnd);
 457                 if (r < 0 && r != -ENODATA) {
 458                         log_link_warning_errno(link, r, "rtnl: received route message with invalid initcwnd, ignoring: %m");
 459                         return 0;
 460                 }
 461
 462                 r = sd_netlink_message_read_u32(message, RTAX_INITRWND, &tmp->initrwnd);
 463                 if (r < 0 && r != -ENODATA) {
 464                         log_link_warning_errno(link, r, "rtnl: received route message with invalid initrwnd, ignoring: %m");
 465                         return 0;
 466                 }
 467
 468                 r = sd_netlink_message_exit_container(message);
 469                 if (r < 0) {
 470                         log_link_error_errno(link, r, "rtnl: Could not exit from RTA_METRICS container: %m");
 471                         return 0;
 472                 }
 473         }
 474
 475         (void) route_get(link, tmp, &route);
 476
 477         if (DEBUG_LOGGING) {
 478                 _cleanup_free_ char *buf_dst = NULL, *buf_dst_prefixlen = NULL,
 479                         *buf_src = NULL, *buf_gw = NULL, *buf_prefsrc = NULL;
 480                 char buf_scope[ROUTE_SCOPE_STR_MAX], buf_table[ROUTE_TABLE_STR_MAX],
 481                         buf_protocol[ROUTE_PROTOCOL_STR_MAX];
 482
 483                 if (!in_addr_is_null(tmp->family, &tmp->dst)) {
 484                         (void) in_addr_to_string(tmp->family, &tmp->dst, &buf_dst);
 485                         (void) asprintf(&buf_dst_prefixlen, "/%u", tmp->dst_prefixlen);
 486                 }
 487                 if (!in_addr_is_null(tmp->family, &tmp->src))
 488                         (void) in_addr_to_string(tmp->family, &tmp->src, &buf_src);
 489                 if (!in_addr_is_null(tmp->family, &tmp->gw))
 490                         (void) in_addr_to_string(tmp->family, &tmp->gw, &buf_gw);
 491                 if (!in_addr_is_null(tmp->family, &tmp->prefsrc))
 492                         (void) in_addr_to_string(tmp->family, &tmp->prefsrc, &buf_prefsrc);
 493
 494                 log_link_debug(link,
 495                                "%s route: dst: %s%s, src: %s, gw: %s, prefsrc: %s, scope: %s, table: %s, proto: %s, type: %s",
 496                                type == RTM_DELROUTE ? "Forgetting" : route ? "Received remembered" : "Remembering",
 497                                strna(buf_dst), strempty(buf_dst_prefixlen),
 498                                strna(buf_src), strna(buf_gw), strna(buf_prefsrc),
 499                                format_route_scope(tmp->scope, buf_scope, sizeof buf_scope),
 500                                format_route_table(tmp->table, buf_table, sizeof buf_table),
 501                                format_route_protocol(tmp->protocol, buf_protocol, sizeof buf_protocol),
 502                                strna(route_type_to_string(tmp->type)));
 503         }
 504
 505         switch (type) {
 506         case RTM_NEWROUTE:
 507                 if (!route) {
 508                         /* A route appeared that we did not request */
 509                         r = route_add_foreign(link, tmp, &route);
 510                         if (r < 0) {
 511                                 log_link_warning_errno(link, r, "Failed to remember foreign route, ignoring: %m");
 512                                 return 0;
 513                         }
 514                 }
 515
 516                 break;
 517
 518         case RTM_DELROUTE:
 519                 route_free(route);
 520                 break;
 521
 522         default:
 523                 assert_not_reached("Received route message with invalid RTNL message type");
 524         }
 525
 526         return 1;
 527 }
 528
 529 static int manager_rtnl_process_neighbor_lladdr(sd_netlink_message *message, union lladdr_union *lladdr, size_t *size, char **str) {
 530         int r;
 531
 532         assert(message);
 533         assert(lladdr);
 534         assert(size);
 535         assert(str);
 536
 537         *str = NULL;
 538
 539         r = sd_netlink_message_read(message, NDA_LLADDR, sizeof(lladdr->ip.in6), &lladdr->ip.in6);
 540         if (r >= 0) {
 541                 *size = sizeof(lladdr->ip.in6);
 542                 if (in_addr_to_string(AF_INET6, &lladdr->ip, str) < 0)
 543                         log_warning_errno(r, "Could not print lower address: %m");
 544                 return r;
 545         }
 546
 547         r = sd_netlink_message_read(message, NDA_LLADDR, sizeof(lladdr->mac), &lladdr->mac);
 548         if (r >= 0) {
 549                 *size = sizeof(lladdr->mac);
 550                 *str = new(char, ETHER_ADDR_TO_STRING_MAX);
 551                 if (!*str) {
 552                         log_oom();
 553                         return r;
 554                 }
 555                 ether_addr_to_string(&lladdr->mac, *str);
 556                 return r;
 557         }
 558
 559         r = sd_netlink_message_read(message, NDA_LLADDR, sizeof(lladdr->ip.in), &lladdr->ip.in);
 560         if (r >= 0) {
 561                 *size = sizeof(lladdr->ip.in);
 562                 if (in_addr_to_string(AF_INET, &lladdr->ip, str) < 0)
 563                         log_warning_errno(r, "Could not print lower address: %m");
 564                 return r;
 565         }
 566
 567         return r;
 568 }
 569
 570 int manager_rtnl_process_neighbor(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 571         Manager *m = userdata;
 572         Link *link = NULL;
 573         Neighbor *neighbor = NULL;
 574         int ifindex, family, r;
 575         uint16_t type, state;
 576         union in_addr_union in_addr = IN_ADDR_NULL;
 577         _cleanup_free_ char *addr_str = NULL;
 578         union lladdr_union lladdr;
 579         size_t lladdr_size = 0;
 580         _cleanup_free_ char *lladdr_str = NULL;
 581
 582         assert(rtnl);
 583         assert(message);
 584         assert(m);
 585
 586         if (sd_netlink_message_is_error(message)) {
 587                 r = sd_netlink_message_get_errno(message);
 588                 if (r < 0)
 589                         log_message_warning_errno(message, r, "rtnl: failed to receive neighbor message, ignoring");
 590
 591                 return 0;
 592         }
 593
 594         r = sd_netlink_message_get_type(message, &type);
 595         if (r < 0) {
 596                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
 597                 return 0;
 598         } else if (!IN_SET(type, RTM_NEWNEIGH, RTM_DELNEIGH)) {
 599                 log_warning("rtnl: received unexpected message type %u when processing neighbor, ignoring.", type);
 600                 return 0;
 601         }
 602
 603         r = sd_rtnl_message_neigh_get_state(message, &state);
 604         if (r < 0) {
 605                 log_link_warning_errno(link, r, "rtnl: received neighbor message with invalid state, ignoring: %m");
 606                 return 0;
 607         } else if (!FLAGS_SET(state, NUD_PERMANENT)) {
 608                 log_debug("rtnl: received non-static neighbor, ignoring.");
 609                 return 0;
 610         }
 611
 612         r = sd_rtnl_message_neigh_get_ifindex(message, &ifindex);
 613         if (r < 0) {
 614                 log_warning_errno(r, "rtnl: could not get ifindex from message, ignoring: %m");
 615                 return 0;
 616         } else if (ifindex <= 0) {
 617                 log_warning("rtnl: received neighbor message with invalid ifindex %d, ignoring.", ifindex);
 618                 return 0;
 619         }
 620
 621         r = link_get(m, ifindex, &link);
 622         if (r < 0 || !link) {
 623                 /* when enumerating we might be out of sync, but we will get the neighbor again, so just
 624                  * ignore it */
 625                 if (!m->enumerating)
 626                         log_warning("rtnl: received neighbor for link '%d' we don't know about, ignoring.", ifindex);
 627                 return 0;
 628         }
 629
 630         r = sd_rtnl_message_neigh_get_family(message, &family);
 631         if (r < 0) {
 632                 log_link_warning(link, "rtnl: received neighbor message withot family, ignoring.");
 633                 return 0;
 634         } else if (!IN_SET(family, AF_INET, AF_INET6)) {
 635                 log_link_debug(link, "rtnl: received neighbor message with invalid family '%i', ignoring.", family);
 636                 return 0;
 637         }
 638
 639         switch (family) {
 640         case AF_INET:
 641                 r = sd_netlink_message_read_in_addr(message, NDA_DST, &in_addr.in);
 642                 if (r < 0) {
 643                         log_link_warning_errno(link, r, "rtnl: received neighbor message without valid address, ignoring: %m");
 644                         return 0;
 645                 }
 646
 647                 break;
 648
 649         case AF_INET6:
 650                 r = sd_netlink_message_read_in6_addr(message, NDA_DST, &in_addr.in6);
 651                 if (r < 0) {
 652                         log_link_warning_errno(link, r, "rtnl: received neighbor message without valid address, ignoring: %m");
 653                         return 0;
 654                 }
 655
 656                 break;
 657
 658         default:
 659                 assert_not_reached("Received unsupported address family");
 660         }
 661
 662         if (in_addr_to_string(family, &in_addr, &addr_str) < 0)
 663                 log_link_warning_errno(link, r, "Could not print address: %m");
 664
 665         r = manager_rtnl_process_neighbor_lladdr(message, &lladdr, &lladdr_size, &lladdr_str);
 666         if (r < 0) {
 667                 log_link_warning_errno(link, r, "rtnl: received neighbor message with invalid lladdr, ignoring: %m");
 668                 return 0;
 669         }
 670
 671         (void) neighbor_get(link, family, &in_addr, &lladdr, lladdr_size, &neighbor);
 672
 673         switch (type) {
 674         case RTM_NEWNEIGH:
 675                 if (neighbor)
 676                         log_link_debug(link, "Remembering neighbor: %s->%s",
 677                                        strnull(addr_str), strnull(lladdr_str));
 678                 else {
 679                         /* A neighbor appeared that we did not request */
 680                         r = neighbor_add_foreign(link, family, &in_addr, &lladdr, lladdr_size, &neighbor);
 681                         if (r < 0) {
 682                                 log_link_warning_errno(link, r, "Failed to remember foreign neighbor %s->%s, ignoring: %m",
 683                                                        strnull(addr_str), strnull(lladdr_str));
 684                                 return 0;
 685                         } else
 686                                 log_link_debug(link, "Remembering foreign neighbor: %s->%s",
 687                                                strnull(addr_str), strnull(lladdr_str));
 688                 }
 689
 690                 break;
 691
 692         case RTM_DELNEIGH:
 693                 if (neighbor) {
 694                         log_link_debug(link, "Forgetting neighbor: %s->%s",
 695                                        strnull(addr_str), strnull(lladdr_str));
 696                         (void) neighbor_free(neighbor);
 697                 } else
 698                         log_link_info(link, "Kernel removed a neighbor we don't remember: %s->%s, ignoring.",
 699                                       strnull(addr_str), strnull(lladdr_str));
 700
 701                 break;
 702
 703         default:
 704                 assert_not_reached("Received invalid RTNL message type");
 705         }
 706
 707         return 1;
 708 }
 709
 710 int manager_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 711         _cleanup_free_ char *buf = NULL;
 712         Manager *m = userdata;
 713         Link *link = NULL;
 714         uint16_t type;
 715         unsigned char flags, prefixlen, scope;
 716         union in_addr_union in_addr = IN_ADDR_NULL;
 717         struct ifa_cacheinfo cinfo;
 718         Address *address = NULL;
 719         char valid_buf[FORMAT_TIMESPAN_MAX];
 720         const char *valid_str = NULL;
 721         int ifindex, family, r;
 722
 723         assert(rtnl);
 724         assert(message);
 725         assert(m);
 726
 727         if (sd_netlink_message_is_error(message)) {
 728                 r = sd_netlink_message_get_errno(message);
 729                 if (r < 0)
 730                         log_message_warning_errno(message, r, "rtnl: failed to receive address message, ignoring");
 731
 732                 return 0;
 733         }
 734
 735         r = sd_netlink_message_get_type(message, &type);
 736         if (r < 0) {
 737                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
 738                 return 0;
 739         } else if (!IN_SET(type, RTM_NEWADDR, RTM_DELADDR)) {
 740                 log_warning("rtnl: received unexpected message type %u when processing address, ignoring.", type);
 741                 return 0;
 742         }
 743
 744         r = sd_rtnl_message_addr_get_ifindex(message, &ifindex);
 745         if (r < 0) {
 746                 log_warning_errno(r, "rtnl: could not get ifindex from message, ignoring: %m");
 747                 return 0;
 748         } else if (ifindex <= 0) {
 749                 log_warning("rtnl: received address message with invalid ifindex %d, ignoring.", ifindex);
 750                 return 0;
 751         }
 752
 753         r = link_get(m, ifindex, &link);
 754         if (r < 0 || !link) {
 755                 /* when enumerating we might be out of sync, but we will get the address again, so just
 756                  * ignore it */
 757                 if (!m->enumerating)
 758                         log_warning("rtnl: received address for link '%d' we don't know about, ignoring.", ifindex);
 759                 return 0;
 760         }
 761
 762         r = sd_rtnl_message_addr_get_family(message, &family);
 763         if (r < 0) {
 764                 log_link_warning(link, "rtnl: received address message without family, ignoring.");
 765                 return 0;
 766         } else if (!IN_SET(family, AF_INET, AF_INET6)) {
 767                 log_link_debug(link, "rtnl: received address message with invalid family '%i', ignoring.", family);
 768                 return 0;
 769         }
 770
 771         r = sd_rtnl_message_addr_get_prefixlen(message, &prefixlen);
 772         if (r < 0) {
 773                 log_link_warning_errno(link, r, "rtnl: received address message with invalid prefixlen, ignoring: %m");
 774                 return 0;
 775         }
 776
 777         r = sd_rtnl_message_addr_get_scope(message, &scope);
 778         if (r < 0) {
 779                 log_link_warning_errno(link, r, "rtnl: received address message with invalid scope, ignoring: %m");
 780                 return 0;
 781         }
 782
 783         r = sd_rtnl_message_addr_get_flags(message, &flags);
 784         if (r < 0) {
 785                 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
 786                 return 0;
 787         }
 788
 789         switch (family) {
 790         case AF_INET:
 791                 r = sd_netlink_message_read_in_addr(message, IFA_LOCAL, &in_addr.in);
 792                 if (r < 0) {
 793                         log_link_warning_errno(link, r, "rtnl: received address message without valid address, ignoring: %m");
 794                         return 0;
 795                 }
 796
 797                 break;
 798
 799         case AF_INET6:
 800                 r = sd_netlink_message_read_in6_addr(message, IFA_ADDRESS, &in_addr.in6);
 801                 if (r < 0) {
 802                         log_link_warning_errno(link, r, "rtnl: received address message without valid address, ignoring: %m");
 803                         return 0;
 804                 }
 805
 806                 break;
 807
 808         default:
 809                 assert_not_reached("Received unsupported address family");
 810         }
 811
 812         r = in_addr_to_string(family, &in_addr, &buf);
 813         if (r < 0)
 814                 log_link_warning_errno(link, r, "Could not print address: %m");
 815
 816         r = sd_netlink_message_read_cache_info(message, IFA_CACHEINFO, &cinfo);
 817         if (r < 0 && r != -ENODATA) {
 818                 log_link_warning_errno(link, r, "rtnl: cannot get IFA_CACHEINFO attribute, ignoring: %m");
 819                 return 0;
 820         } else if (r >= 0 && cinfo.ifa_valid != CACHE_INFO_INFINITY_LIFE_TIME)
 821                 valid_str = format_timespan(valid_buf, FORMAT_TIMESPAN_MAX,
 822                                             cinfo.ifa_valid * USEC_PER_SEC,
 823                                             USEC_PER_SEC);
 824
 825         (void) address_get(link, family, &in_addr, prefixlen, &address);
 826
 827         switch (type) {
 828         case RTM_NEWADDR:
 829                 if (address)
 830                         log_link_debug(link, "Remembering updated address: %s/%u (valid %s%s)",
 831                                        strnull(buf), prefixlen,
 832                                        valid_str ? "for " : "forever", strempty(valid_str));
 833                 else {
 834                         /* An address appeared that we did not request */
 835                         r = address_add_foreign(link, family, &in_addr, prefixlen, &address);
 836                         if (r < 0) {
 837                                 log_link_warning_errno(link, r, "Failed to remember foreign address %s/%u, ignoring: %m",
 838                                                        strnull(buf), prefixlen);
 839                                 return 0;
 840                         } else
 841                                 log_link_debug(link, "Remembering foreign address: %s/%u (valid %s%s)",
 842                                                strnull(buf), prefixlen,
 843                                                valid_str ? "for " : "forever", strempty(valid_str));
 844                 }
 845
 846                 /* address_update() logs internally, so we don't need to. */
 847                 (void) address_update(address, flags, scope, &cinfo);
 848
 849                 break;
 850
 851         case RTM_DELADDR:
 852                 if (address) {
 853                         log_link_debug(link, "Forgetting address: %s/%u (valid %s%s)",
 854                                        strnull(buf), prefixlen,
 855                                        valid_str ? "for " : "forever", strempty(valid_str));
 856                         (void) address_drop(address);
 857                 } else
 858                         log_link_info(link, "Kernel removed an address we don't remember: %s/%u (valid %s%s), ignoring.",
 859                                       strnull(buf), prefixlen,
 860                                       valid_str ? "for " : "forever", strempty(valid_str));
 861
 862                 break;
 863
 864         default:
 865                 assert_not_reached("Received invalid RTNL message type");
 866         }
 867
 868         return 1;
 869 }
 870
 871 static int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 872         Manager *m = userdata;
 873         Link *link = NULL;
 874         NetDev *netdev = NULL;
 875         uint16_t type;
 876         const char *name;
 877         int r, ifindex;
 878
 879         assert(rtnl);
 880         assert(message);
 881         assert(m);
 882
 883         if (sd_netlink_message_is_error(message)) {
 884                 r = sd_netlink_message_get_errno(message);
 885                 if (r < 0)
 886                         log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
 887
 888                 return 0;
 889         }
 890
 891         r = sd_netlink_message_get_type(message, &type);
 892         if (r < 0) {
 893                 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
 894                 return 0;
 895         } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
 896                 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
 897                 return 0;
 898         }
 899
 900         r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
 901         if (r < 0) {
 902                 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
 903                 return 0;
 904         } else if (ifindex <= 0) {
 905                 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
 906                 return 0;
 907         }
 908
 909         r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
 910         if (r < 0) {
 911                 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
 912                 return 0;
 913         }
 914
 915         (void) link_get(m, ifindex, &link);
 916         (void) netdev_get(m, name, &netdev);
 917
 918         switch (type) {
 919         case RTM_NEWLINK:
 920                 if (!link) {
 921                         /* link is new, so add it */
 922                         r = link_add(m, message, &link);
 923                         if (r < 0) {
 924                                 log_warning_errno(r, "Could not process new link message, ignoring: %m");
 925                                 return 0;
 926                         }
 927                 }
 928
 929                 if (netdev) {
 930                         /* netdev exists, so make sure the ifindex matches */
 931                         r = netdev_set_ifindex(netdev, message);
 932                         if (r < 0) {
 933                                 log_warning_errno(r, "Could not process new link message for netdev, ignoring: %m");
 934                                 return 0;
 935                         }
 936                 }
 937
 938                 r = link_update(link, message);
 939                 if (r < 0) {
 940                         log_warning_errno(r, "Could not process link message, ignoring: %m");
 941                         return 0;
 942                 }
 943
 944                 break;
 945
 946         case RTM_DELLINK:
 947                 link_drop(link);
 948                 netdev_drop(netdev);
 949
 950                 break;
 951
 952         default:
 953                 assert_not_reached("Received link message with invalid RTNL message type.");
 954         }
 955
 956         return 1;
 957 }
 958
 959 int manager_rtnl_process_rule(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 960         _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *tmp = NULL;
 961         _cleanup_free_ char *from = NULL, *to = NULL;
 962         RoutingPolicyRule *rule = NULL;
 963         const char *iif = NULL, *oif = NULL;
 964         Manager *m = userdata;
 965         unsigned flags;
 966         uint16_t type;
 967         int r;
 968
 969         assert(rtnl);
 970         assert(message);
 971         assert(m);
 972
 973         if (sd_netlink_message_is_error(message)) {
 974                 r = sd_netlink_message_get_errno(message);
 975                 if (r < 0)
 976                         log_message_warning_errno(message, r, "rtnl: failed to receive rule message, ignoring");
 977
 978                 return 0;
 979         }
 980
 981         r = sd_netlink_message_get_type(message, &type);
 982         if (r < 0) {
 983                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
 984                 return 0;
 985         } else if (!IN_SET(type, RTM_NEWRULE, RTM_DELRULE)) {
 986                 log_warning("rtnl: received unexpected message type %u when processing rule, ignoring.", type);
 987                 return 0;
 988         }
 989
 990         r = routing_policy_rule_new(&tmp);
 991         if (r < 0) {
 992                 log_oom();
 993                 return 0;
 994         }
 995
 996         r = sd_rtnl_message_get_family(message, &tmp->family);
 997         if (r < 0) {
 998                 log_warning_errno(r, "rtnl: could not get rule family, ignoring: %m");
 999                 return 0;
1000         } else if (!IN_SET(tmp->family, AF_INET, AF_INET6)) {
1001                 log_debug("rtnl: received rule message with invalid family %d, ignoring.", tmp->family);
1002                 return 0;
1003         }
1004
1005         switch (tmp->family) {
1006         case AF_INET:
1007                 r = sd_netlink_message_read_in_addr(message, FRA_SRC, &tmp->from.in);
1008                 if (r < 0 && r != -ENODATA) {
1009                         log_warning_errno(r, "rtnl: could not get FRA_SRC attribute, ignoring: %m");
1010                         return 0;
1011                 } else if (r >= 0) {
1012                         r = sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(message, &tmp->from_prefixlen);
1013                         if (r < 0) {
1014                                 log_warning_errno(r, "rtnl: received rule message without valid source prefix length, ignoring: %m");
1015                                 return 0;
1016                         }
1017                 }
1018
1019                 r = sd_netlink_message_read_in_addr(message, FRA_DST, &tmp->to.in);
1020                 if (r < 0 && r != -ENODATA) {
1021                         log_warning_errno(r, "rtnl: could not get FRA_DST attribute, ignoring: %m");
1022                         return 0;
1023                 } else if (r >= 0) {
1024                         r = sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(message, &tmp->to_prefixlen);
1025                         if (r < 0) {
1026                                 log_warning_errno(r, "rtnl: received rule message without valid destination prefix length, ignoring: %m");
1027                                 return 0;
1028                         }
1029                 }
1030
1031                 break;
1032
1033         case AF_INET6:
1034                 r = sd_netlink_message_read_in6_addr(message, FRA_SRC, &tmp->from.in6);
1035                 if (r < 0 && r != -ENODATA) {
1036                         log_warning_errno(r, "rtnl: could not get FRA_SRC attribute, ignoring: %m");
1037                         return 0;
1038                 } else if (r >= 0) {
1039                         r = sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(message, &tmp->from_prefixlen);
1040                         if (r < 0) {
1041                                 log_warning_errno(r, "rtnl: received rule message without valid source prefix length, ignoring: %m");
1042                                 return 0;
1043                         }
1044                 }
1045
1046                 r = sd_netlink_message_read_in6_addr(message, FRA_DST, &tmp->to.in6);
1047                 if (r < 0 && r != -ENODATA) {
1048                         log_warning_errno(r, "rtnl: could not get FRA_DST attribute, ignoring: %m");
1049                         return 0;
1050                 } else if (r >= 0) {
1051                         r = sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(message, &tmp->to_prefixlen);
1052                         if (r < 0) {
1053                                 log_warning_errno(r, "rtnl: received rule message without valid destination prefix length, ignoring: %m");
1054                                 return 0;
1055                         }
1056                 }
1057
1058                 break;
1059
1060         default:
1061                 assert_not_reached("Received rule message with unsupported address family");
1062         }
1063
1064         if (tmp->from_prefixlen == 0 && tmp->to_prefixlen == 0)
1065                 return 0;
1066
1067         r = sd_rtnl_message_routing_policy_rule_get_flags(message, &flags);
1068         if (r < 0) {
1069                 log_warning_errno(r, "rtnl: received rule message without valid flag, ignoring: %m");
1070                 return 0;
1071         }
1072         tmp->invert_rule = flags & FIB_RULE_INVERT;
1073
1074         r = sd_netlink_message_read_u32(message, FRA_FWMARK, &tmp->fwmark);
1075         if (r < 0 && r != -ENODATA) {
1076                 log_warning_errno(r, "rtnl: could not get FRA_FWMARK attribute, ignoring: %m");
1077                 return 0;
1078         }
1079
1080         r = sd_netlink_message_read_u32(message, FRA_FWMASK, &tmp->fwmask);
1081         if (r < 0 && r != -ENODATA) {
1082                 log_warning_errno(r, "rtnl: could not get FRA_FWMASK attribute, ignoring: %m");
1083                 return 0;
1084         }
1085
1086         r = sd_netlink_message_read_u32(message, FRA_PRIORITY, &tmp->priority);
1087         if (r < 0 && r != -ENODATA) {
1088                 log_warning_errno(r, "rtnl: could not get FRA_PRIORITY attribute, ignoring: %m");
1089                 return 0;
1090         }
1091
1092         r = sd_netlink_message_read_u32(message, FRA_TABLE, &tmp->table);
1093         if (r < 0 && r != -ENODATA) {
1094                 log_warning_errno(r, "rtnl: could not get FRA_TABLE attribute, ignoring: %m");
1095                 return 0;
1096         }
1097
1098         r = sd_rtnl_message_routing_policy_rule_get_tos(message, &tmp->tos);
1099         if (r < 0 && r != -ENODATA) {
1100                 log_warning_errno(r, "rtnl: could not get ip rule TOS, ignoring: %m");
1101                 return 0;
1102         }
1103
1104         r = sd_netlink_message_read_string(message, FRA_IIFNAME, &iif);
1105         if (r < 0 && r != -ENODATA) {
1106                 log_warning_errno(r, "rtnl: could not get FRA_IIFNAME attribute, ignoring: %m");
1107                 return 0;
1108         }
1109         r = free_and_strdup(&tmp->iif, iif);
1110         if (r < 0)
1111                 return log_oom();
1112
1113         r = sd_netlink_message_read_string(message, FRA_OIFNAME, &oif);
1114         if (r < 0 && r != -ENODATA) {
1115                 log_warning_errno(r, "rtnl: could not get FRA_OIFNAME attribute, ignoring: %m");
1116                 return 0;
1117         }
1118         r = free_and_strdup(&tmp->oif, oif);
1119         if (r < 0)
1120                 return log_oom();
1121
1122         r = sd_netlink_message_read_u8(message, FRA_IP_PROTO, &tmp->protocol);
1123         if (r < 0 && r != -ENODATA) {
1124                 log_warning_errno(r, "rtnl: could not get FRA_IP_PROTO attribute, ignoring: %m");
1125                 return 0;
1126         }
1127
1128         r = sd_netlink_message_read(message, FRA_SPORT_RANGE, sizeof(tmp->sport), &tmp->sport);
1129         if (r < 0 && r != -ENODATA) {
1130                 log_warning_errno(r, "rtnl: could not get FRA_SPORT_RANGE attribute, ignoring: %m");
1131                 return 0;
1132         }
1133
1134         r = sd_netlink_message_read(message, FRA_DPORT_RANGE, sizeof(tmp->dport), &tmp->dport);
1135         if (r < 0 && r != -ENODATA) {
1136                 log_warning_errno(r, "rtnl: could not get FRA_DPORT_RANGE attribute, ignoring: %m");
1137                 return 0;
1138         }
1139
1140         (void) routing_policy_rule_get(m, tmp, &rule);
1141
1142         if (DEBUG_LOGGING) {
1143                 (void) in_addr_to_string(tmp->family, &tmp->from, &from);
1144                 (void) in_addr_to_string(tmp->family, &tmp->to, &to);
1145         }
1146
1147         switch (type) {
1148         case RTM_NEWRULE:
1149                 if (!rule) {
1150                         log_debug("Remembering foreign routing policy rule: %s/%u -> %s/%u, iif: %s, oif: %s, table: %u",
1151                                   from, tmp->from_prefixlen, to, tmp->to_prefixlen, strna(tmp->iif), strna(tmp->oif), tmp->table);
1152                         r = routing_policy_rule_add_foreign(m, tmp, &rule);
1153                         if (r < 0) {
1154                                 log_warning_errno(r, "Could not remember foreign rule, ignoring: %m");
1155                                 return 0;
1156                         }
1157                 }
1158                 break;
1159         case RTM_DELRULE:
1160                 log_debug("Forgetting routing policy rule: %s/%u -> %s/%u, iif: %s, oif: %s, table: %u",
1161                           from, tmp->from_prefixlen, to, tmp->to_prefixlen, strna(tmp->iif), strna(tmp->oif), tmp->table);
1162                 routing_policy_rule_free(rule);
1163
1164                 break;
1165
1166         default:
1167                 assert_not_reached("Received invalid RTNL message type");
1168         }
1169
1170         return 1;
1171 }
1172
1173 int manager_rtnl_process_nexthop(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
1174         _cleanup_(nexthop_freep) NextHop *tmp = NULL;
1175         _cleanup_free_ char *gateway = NULL;
1176         NextHop *nexthop = NULL;
1177         Manager *m = userdata;
1178         Link *link = NULL;
1179         uint16_t type;
1180         int r;
1181
1182         assert(rtnl);
1183         assert(message);
1184         assert(m);
1185
1186         if (sd_netlink_message_is_error(message)) {
1187                 r = sd_netlink_message_get_errno(message);
1188                 if (r < 0)
1189                         log_message_warning_errno(message, r, "rtnl: failed to receive rule message, ignoring");
1190
1191                 return 0;
1192         }
1193
1194         r = sd_netlink_message_get_type(message, &type);
1195         if (r < 0) {
1196                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
1197                 return 0;
1198         } else if (!IN_SET(type, RTM_NEWNEXTHOP, RTM_DELNEXTHOP)) {
1199                 log_warning("rtnl: received unexpected message type %u when processing nexthop, ignoring.", type);
1200                 return 0;
1201         }
1202
1203         r = nexthop_new(&tmp);
1204         if (r < 0)
1205                 return log_oom();
1206
1207         r = sd_rtnl_message_get_family(message, &tmp->family);
1208         if (r < 0) {
1209                 log_warning_errno(r, "rtnl: could not get nexthop family, ignoring: %m");
1210                 return 0;
1211         } else if (!IN_SET(tmp->family, AF_INET, AF_INET6)) {
1212                 log_debug("rtnl: received nexthop message with invalid family %d, ignoring.", tmp->family);
1213                 return 0;
1214         }
1215
1216         switch (tmp->family) {
1217         case AF_INET:
1218                 r = sd_netlink_message_read_in_addr(message, NHA_GATEWAY, &tmp->gw.in);
1219                 if (r < 0 && r != -ENODATA) {
1220                         log_warning_errno(r, "rtnl: could not get NHA_GATEWAY attribute, ignoring: %m");
1221                         return 0;
1222                 }
1223                 break;
1224
1225         case AF_INET6:
1226                 r = sd_netlink_message_read_in6_addr(message, NHA_GATEWAY, &tmp->gw.in6);
1227                 if (r < 0 && r != -ENODATA) {
1228                         log_warning_errno(r, "rtnl: could not get NHA_GATEWAY attribute, ignoring: %m");
1229                         return 0;
1230                 }
1231                 break;
1232
1233         default:
1234                 assert_not_reached("Received rule message with unsupported address family");
1235         }
1236
1237         r = sd_netlink_message_read_u32(message, NHA_ID, &tmp->id);
1238         if (r < 0 && r != -ENODATA) {
1239                 log_warning_errno(r, "rtnl: could not get NHA_ID attribute, ignoring: %m");
1240                 return 0;
1241         }
1242
1243         r = sd_netlink_message_read_u32(message, NHA_OIF, &tmp->oif);
1244         if (r < 0 && r != -ENODATA) {
1245                 log_warning_errno(r, "rtnl: could not get NHA_OIF attribute, ignoring: %m");
1246                 return 0;
1247         }
1248
1249         r = link_get(m, tmp->oif, &link);
1250         if (r < 0 || !link) {
1251                 if (!m->enumerating)
1252                         log_warning("rtnl: received nexthop message for link (%d) we do not know about, ignoring", tmp->oif);
1253                 return 0;
1254         }
1255
1256         (void) nexthop_get(link, tmp, &nexthop);
1257
1258         if (DEBUG_LOGGING)
1259                 (void) in_addr_to_string(tmp->family, &tmp->gw, &gateway);
1260
1261         switch (type) {
1262         case RTM_NEWNEXTHOP:
1263                 if (!nexthop) {
1264                         log_debug("Remembering foreign nexthop: %s, oif: %d, id: %d", gateway, tmp->oif, tmp->id);
1265                         r = nexthop_add_foreign(link, tmp, &nexthop);
1266                         if (r < 0) {
1267                                 log_warning_errno(r, "Could not remember foreign nexthop, ignoring: %m");
1268                                 return 0;
1269                         }
1270                 }
1271                 break;
1272         case RTM_DELNEXTHOP:
1273                 log_debug("Forgetting foreign nexthop: %s, oif: %d, id: %d", gateway, tmp->oif, tmp->id);
1274                 nexthop_free(nexthop);
1275
1276                 break;
1277
1278         default:
1279                 assert_not_reached("Received invalid RTNL message type");
1280         }
1281
1282         return 1;
1283 }
1284
1285 static int systemd_netlink_fd(void) {
1286         int n, fd, rtnl_fd = -EINVAL;
1287
1288         n = sd_listen_fds(true);
1289         if (n <= 0)
1290                 return -EINVAL;
1291
1292         for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++) {
1293                 if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) {
1294                         if (rtnl_fd >= 0)
1295                                 return -EINVAL;
1296
1297                         rtnl_fd = fd;
1298                 }
1299         }
1300
1301         return rtnl_fd;
1302 }
1303
1304 static int manager_connect_genl(Manager *m) {
1305         int r;
1306
1307         assert(m);
1308
1309         r = sd_genl_socket_open(&m->genl);
1310         if (r < 0)
1311                 return r;
1312
1313         r = sd_netlink_inc_rcvbuf(m->genl, RCVBUF_SIZE);
1314         if (r < 0)
1315                 return r;
1316
1317         r = sd_netlink_attach_event(m->genl, m->event, 0);
1318         if (r < 0)
1319                 return r;
1320
1321         return 0;
1322 }
1323
1324 static int manager_connect_rtnl(Manager *m) {
1325         int fd, r;
1326
1327         assert(m);
1328
1329         fd = systemd_netlink_fd();
1330         if (fd < 0)
1331                 r = sd_netlink_open(&m->rtnl);
1332         else
1333                 r = sd_netlink_open_fd(&m->rtnl, fd);
1334         if (r < 0)
1335                 return r;
1336
1337         r = sd_netlink_inc_rcvbuf(m->rtnl, RCVBUF_SIZE);
1338         if (r < 0)
1339                 return r;
1340
1341         r = sd_netlink_attach_event(m->rtnl, m->event, 0);
1342         if (r < 0)
1343                 return r;
1344
1345         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link");
1346         if (r < 0)
1347                 return r;
1348
1349         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link");
1350         if (r < 0)
1351                 return r;
1352
1353         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address");
1354         if (r < 0)
1355                 return r;
1356
1357         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address");
1358         if (r < 0)
1359                 return r;
1360
1361         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWNEIGH, &manager_rtnl_process_neighbor, NULL, m, "network-rtnl_process_neighbor");
1362         if (r < 0)
1363                 return r;
1364
1365         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELNEIGH, &manager_rtnl_process_neighbor, NULL, m, "network-rtnl_process_neighbor");
1366         if (r < 0)
1367                 return r;
1368
1369         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route");
1370         if (r < 0)
1371                 return r;
1372
1373         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route");
1374         if (r < 0)
1375                 return r;
1376
1377         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule");
1378         if (r < 0)
1379                 return r;
1380
1381         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule");
1382         if (r < 0)
1383                 return r;
1384
1385         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWNEXTHOP, &manager_rtnl_process_nexthop, NULL, m, "network-rtnl_process_nexthop");
1386         if (r < 0)
1387                 return r;
1388
1389         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELNEXTHOP, &manager_rtnl_process_nexthop, NULL, m, "network-rtnl_process_nexthop");
1390         if (r < 0)
1391                 return r;
1392
1393         return 0;
1394 }
1395
1396 static int ordered_set_put_in_addr_data(OrderedSet *s, const struct in_addr_data *address) {
1397         char *p;
1398         int r;
1399
1400         assert(s);
1401         assert(address);
1402
1403         r = in_addr_to_string(address->family, &address->address, &p);
1404         if (r < 0)
1405                 return r;
1406
1407         r = ordered_set_consume(s, p);
1408         if (r == -EEXIST)
1409                 return 0;
1410
1411         return r;
1412 }
1413
1414 static int ordered_set_put_in_addr_datav(OrderedSet *s, const struct in_addr_data *addresses, unsigned n) {
1415         int r, c = 0;
1416         unsigned i;
1417
1418         assert(s);
1419         assert(addresses || n == 0);
1420
1421         for (i = 0; i < n; i++) {
1422                 r = ordered_set_put_in_addr_data(s, addresses+i);
1423                 if (r < 0)
1424                         return r;
1425
1426                 c += r;
1427         }
1428
1429         return c;
1430 }
1431
1432 static int ordered_set_put_in4_addr(OrderedSet *s, const struct in_addr *address) {
1433         char *p;
1434         int r;
1435
1436         assert(s);
1437         assert(address);
1438
1439         r = in_addr_to_string(AF_INET, (const union in_addr_union*) address, &p);
1440         if (r < 0)
1441                 return r;
1442
1443         r = ordered_set_consume(s, p);
1444         if (r == -EEXIST)
1445                 return 0;
1446
1447         return r;
1448 }
1449
1450 static int ordered_set_put_in4_addrv(OrderedSet *s,
1451                                      const struct in_addr *addresses,
1452                                      size_t n,
1453                                      bool (*predicate)(const struct in_addr *addr)) {
1454         int r, c = 0;
1455         size_t i;
1456
1457         assert(s);
1458         assert(n == 0 || addresses);
1459
1460         for (i = 0; i < n; i++) {
1461                 if (predicate && !predicate(&addresses[i]))
1462                         continue;
1463                 r = ordered_set_put_in4_addr(s, addresses+i);
1464                 if (r < 0)
1465                         return r;
1466
1467                 c += r;
1468         }
1469
1470         return c;
1471 }
1472
1473 static int manager_save(Manager *m) {
1474         _cleanup_ordered_set_free_free_ OrderedSet *dns = NULL, *ntp = NULL, *sip = NULL, *search_domains = NULL, *route_domains = NULL;
1475         const char *operstate_str, *carrier_state_str, *address_state_str;
1476         LinkOperationalState operstate = LINK_OPERSTATE_OFF;
1477         LinkCarrierState carrier_state = LINK_CARRIER_STATE_OFF;
1478         LinkAddressState address_state = LINK_ADDRESS_STATE_OFF;
1479         _cleanup_free_ char *temp_path = NULL;
1480         _cleanup_strv_free_ char **p = NULL;
1481         _cleanup_fclose_ FILE *f = NULL;
1482         Link *link;
1483         Iterator i;
1484         int r;
1485
1486         assert(m);
1487         assert(m->state_file);
1488
1489         /* We add all NTP and DNS server to a set, to filter out duplicates */
1490         dns = ordered_set_new(&string_hash_ops);
1491         if (!dns)
1492                 return -ENOMEM;
1493
1494         ntp = ordered_set_new(&string_hash_ops);
1495         if (!ntp)
1496                 return -ENOMEM;
1497
1498        sip = ordered_set_new(&string_hash_ops);
1499        if (!sip)
1500                 return -ENOMEM;
1501
1502         search_domains = ordered_set_new(&dns_name_hash_ops);
1503         if (!search_domains)
1504                 return -ENOMEM;
1505
1506         route_domains = ordered_set_new(&dns_name_hash_ops);
1507         if (!route_domains)
1508                 return -ENOMEM;
1509
1510         HASHMAP_FOREACH(link, m->links, i) {
1511                 if (link->flags & IFF_LOOPBACK)
1512                         continue;
1513
1514                 if (link->operstate > operstate)
1515                         operstate = link->operstate;
1516
1517                 if (link->carrier_state > carrier_state)
1518                         carrier_state = link->carrier_state;
1519
1520                 if (link->address_state > address_state)
1521                         address_state = link->address_state;
1522
1523                 if (!link->network)
1524                         continue;
1525
1526                 /* First add the static configured entries */
1527                 r = ordered_set_put_in_addr_datav(dns, link->network->dns, link->network->n_dns);
1528                 if (r < 0)
1529                         return r;
1530
1531                 r = ordered_set_put_strdupv(ntp, link->ntp ?: link->network->ntp);
1532                 if (r < 0)
1533                         return r;
1534
1535                 r = ordered_set_put_string_set(search_domains, link->search_domains ?: link->network->search_domains);
1536                 if (r < 0)
1537                         return r;
1538
1539                 r = ordered_set_put_string_set(route_domains, link->route_domains ?: link->network->route_domains);
1540                 if (r < 0)
1541                         return r;
1542
1543                 if (!link->dhcp_lease)
1544                         continue;
1545
1546                 /* Secondly, add the entries acquired via DHCP */
1547                 if (link->network->dhcp_use_dns) {
1548                         const struct in_addr *addresses;
1549
1550                         r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
1551                         if (r > 0) {
1552                                 r = ordered_set_put_in4_addrv(dns, addresses, r, in4_addr_is_non_local);
1553                                 if (r < 0)
1554                                         return r;
1555                         } else if (r < 0 && r != -ENODATA)
1556                                 return r;
1557                 }
1558
1559                 if (link->network->dhcp_use_ntp) {
1560                         const struct in_addr *addresses;
1561
1562                         r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
1563                         if (r > 0) {
1564                                 r = ordered_set_put_in4_addrv(ntp, addresses, r, in4_addr_is_non_local);
1565                                 if (r < 0)
1566                                         return r;
1567                         } else if (r < 0 && r != -ENODATA)
1568                                 return r;
1569                 }
1570
1571                 if (link->network->dhcp_use_sip) {
1572                         const struct in_addr *addresses;
1573
1574                         r = sd_dhcp_lease_get_sip(link->dhcp_lease, &addresses);
1575                         if (r > 0) {
1576                                 r = ordered_set_put_in4_addrv(sip, addresses, r, in4_addr_is_non_local);
1577                                 if (r < 0)
1578                                         return r;
1579                         } else if (r < 0 && r != -ENODATA)
1580                                 return r;
1581                 }
1582
1583                 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
1584                         const char *domainname;
1585                         char **domains = NULL;
1586
1587                         OrderedSet *target_domains = (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) ? search_domains : route_domains;
1588                         r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname);
1589                         if (r >= 0) {
1590                                 r = ordered_set_put_strdup(target_domains, domainname);
1591                                 if (r < 0)
1592                                         return r;
1593                         } else if (r != -ENODATA)
1594                                 return r;
1595
1596                         r = sd_dhcp_lease_get_search_domains(link->dhcp_lease, &domains);
1597                         if (r >= 0) {
1598                                 r = ordered_set_put_strdupv(target_domains, domains);
1599                                 if (r < 0)
1600                                         return r;
1601                         } else if (r != -ENODATA)
1602                                 return r;
1603                 }
1604         }
1605
1606         if (carrier_state >= LINK_CARRIER_STATE_ENSLAVED)
1607                 carrier_state = LINK_CARRIER_STATE_CARRIER;
1608
1609         operstate_str = link_operstate_to_string(operstate);
1610         assert(operstate_str);
1611
1612         carrier_state_str = link_carrier_state_to_string(carrier_state);
1613         assert(carrier_state_str);
1614
1615         address_state_str = link_address_state_to_string(address_state);
1616         assert(address_state_str);
1617
1618         r = fopen_temporary(m->state_file, &f, &temp_path);
1619         if (r < 0)
1620                 return r;
1621
1622         (void) fchmod(fileno(f), 0644);
1623
1624         fprintf(f,
1625                 "# This is private data. Do not parse.\n"
1626                 "OPER_STATE=%s\n"
1627                 "CARRIER_STATE=%s\n"
1628                 "ADDRESS_STATE=%s\n",
1629                 operstate_str, carrier_state_str, address_state_str);
1630
1631         ordered_set_print(f, "DNS=", dns);
1632         ordered_set_print(f, "NTP=", ntp);
1633         ordered_set_print(f, "SIP=", sip);
1634         ordered_set_print(f, "DOMAINS=", search_domains);
1635         ordered_set_print(f, "ROUTE_DOMAINS=", route_domains);
1636
1637         r = routing_policy_serialize_rules(m->rules, f);
1638         if (r < 0)
1639                 goto fail;
1640
1641         r = fflush_and_check(f);
1642         if (r < 0)
1643                 goto fail;
1644
1645         if (rename(temp_path, m->state_file) < 0) {
1646                 r = -errno;
1647                 goto fail;
1648         }
1649
1650         if (m->operational_state != operstate) {
1651                 m->operational_state = operstate;
1652                 if (strv_extend(&p, "OperationalState") < 0)
1653                         log_oom();
1654         }
1655
1656         if (m->carrier_state != carrier_state) {
1657                 m->carrier_state = carrier_state;
1658                 if (strv_extend(&p, "CarrierState") < 0)
1659                         log_oom();
1660         }
1661
1662         if (m->address_state != address_state) {
1663                 m->address_state = address_state;
1664                 if (strv_extend(&p, "AddressState") < 0)
1665                         log_oom();
1666         }
1667
1668         if (p) {
1669                 r = manager_send_changed_strv(m, p);
1670                 if (r < 0)
1671                         log_error_errno(r, "Could not emit changed properties: %m");
1672         }
1673
1674         m->dirty = false;
1675
1676         return 0;
1677
1678 fail:
1679         (void) unlink(m->state_file);
1680         (void) unlink(temp_path);
1681
1682         return log_error_errno(r, "Failed to save network state to %s: %m", m->state_file);
1683 }
1684
1685 static int manager_dirty_handler(sd_event_source *s, void *userdata) {
1686         Manager *m = userdata;
1687         Link *link;
1688         Iterator i;
1689
1690         assert(m);
1691
1692         if (m->dirty)
1693                 manager_save(m);
1694
1695         SET_FOREACH(link, m->dirty_links, i)
1696                 if (link_save(link) >= 0)
1697                         link_clean(link);
1698
1699         return 1;
1700 }
1701
1702 static int signal_terminate_callback(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
1703         Manager *m = userdata;
1704
1705         assert(m);
1706         m->restarting = false;
1707
1708         log_debug("Terminate operation initiated.");
1709
1710         return sd_event_exit(sd_event_source_get_event(s), 0);
1711 }
1712
1713 static int signal_restart_callback(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
1714         Manager *m = userdata;
1715
1716         assert(m);
1717         m->restarting = true;
1718
1719         log_debug("Restart operation initiated.");
1720
1721         return sd_event_exit(sd_event_source_get_event(s), 0);
1722 }
1723
1724 int manager_new(Manager **ret) {
1725         _cleanup_(manager_freep) Manager *m = NULL;
1726         int r;
1727
1728         m = new(Manager, 1);
1729         if (!m)
1730                 return -ENOMEM;
1731
1732         *m = (Manager) {
1733                 .speed_meter_interval_usec = SPEED_METER_DEFAULT_TIME_INTERVAL,
1734         };
1735
1736         m->state_file = strdup("/run/systemd/netif/state");
1737         if (!m->state_file)
1738                 return -ENOMEM;
1739
1740         r = sd_event_default(&m->event);
1741         if (r < 0)
1742                 return r;
1743
1744         assert_se(sigprocmask_many(SIG_SETMASK, NULL, SIGINT, SIGTERM, SIGUSR2, -1) >= 0);
1745
1746         (void) sd_event_set_watchdog(m->event, true);
1747         (void) sd_event_add_signal(m->event, NULL, SIGTERM, signal_terminate_callback, m);
1748         (void) sd_event_add_signal(m->event, NULL, SIGINT, signal_terminate_callback, m);
1749         (void) sd_event_add_signal(m->event, NULL, SIGUSR2, signal_restart_callback, m);
1750
1751         r = sd_event_add_post(m->event, NULL, manager_dirty_handler, m);
1752         if (r < 0)
1753                 return r;
1754
1755         r = manager_connect_rtnl(m);
1756         if (r < 0)
1757                 return r;
1758
1759         r = manager_connect_genl(m);
1760         if (r < 0)
1761                 return r;
1762
1763         r = manager_connect_udev(m);
1764         if (r < 0)
1765                 return r;
1766
1767         r = sd_resolve_default(&m->resolve);
1768         if (r < 0)
1769                 return r;
1770
1771         r = sd_resolve_attach_event(m->resolve, m->event, 0);
1772         if (r < 0)
1773                 return r;
1774
1775         r = setup_default_address_pool(m);
1776         if (r < 0)
1777                 return r;
1778
1779         m->duid.type = DUID_TYPE_EN;
1780
1781         (void) routing_policy_load_rules(m->state_file, &m->rules_saved);
1782
1783         *ret = TAKE_PTR(m);
1784
1785         return 0;
1786 }
1787
1788 void manager_free(Manager *m) {
1789         struct in6_addr *a;
1790         AddressPool *pool;
1791         Link *link;
1792
1793         if (!m)
1794                 return;
1795
1796         free(m->state_file);
1797
1798         while ((a = hashmap_first_key(m->dhcp6_prefixes)))
1799                 (void) dhcp6_prefix_remove(m, a);
1800         m->dhcp6_prefixes = hashmap_free(m->dhcp6_prefixes);
1801
1802         while ((link = hashmap_steal_first(m->links))) {
1803                 if (link->dhcp6_client)
1804                         (void) dhcp6_lease_pd_prefix_lost(link->dhcp6_client, link);
1805
1806                 (void) link_stop_clients(link, true);
1807
1808                 link_unref(link);
1809         }
1810
1811         m->dirty_links = set_free_with_destructor(m->dirty_links, link_unref);
1812         m->links_requesting_uuid = set_free_with_destructor(m->links_requesting_uuid, link_unref);
1813         m->links = hashmap_free_with_destructor(m->links, link_unref);
1814
1815         m->duids_requesting_uuid = set_free(m->duids_requesting_uuid);
1816         m->networks = ordered_hashmap_free_with_destructor(m->networks, network_unref);
1817
1818         m->netdevs = hashmap_free_with_destructor(m->netdevs, netdev_unref);
1819
1820         while ((pool = m->address_pools))
1821                 address_pool_free(pool);
1822
1823         /* routing_policy_rule_free() access m->rules and m->rules_foreign.
1824          * So, it is necessary to set NULL after the sets are freed. */
1825         m->rules = set_free_with_destructor(m->rules, routing_policy_rule_free);
1826         m->rules_foreign = set_free_with_destructor(m->rules_foreign, routing_policy_rule_free);
1827         set_free_with_destructor(m->rules_saved, routing_policy_rule_free);
1828
1829         sd_netlink_unref(m->rtnl);
1830         sd_netlink_unref(m->genl);
1831         sd_resolve_unref(m->resolve);
1832
1833         sd_event_source_unref(m->speed_meter_event_source);
1834         sd_event_unref(m->event);
1835
1836         sd_device_monitor_unref(m->device_monitor);
1837
1838         bus_verify_polkit_async_registry_free(m->polkit_registry);
1839         sd_bus_flush_close_unref(m->bus);
1840
1841         free(m->dynamic_timezone);
1842         free(m->dynamic_hostname);
1843
1844         free(m);
1845 }
1846
1847 int manager_start(Manager *m) {
1848         Link *link;
1849         Iterator i;
1850         int r;
1851
1852         assert(m);
1853
1854         r = manager_start_speed_meter(m);
1855         if (r < 0)
1856                 return log_error_errno(r, "Failed to initialize speed meter: %m");
1857
1858         /* The dirty handler will deal with future serialization, but the first one
1859            must be done explicitly. */
1860
1861         manager_save(m);
1862
1863         HASHMAP_FOREACH(link, m->links, i)
1864                 link_save(link);
1865
1866         return 0;
1867 }
1868
1869 int manager_load_config(Manager *m) {
1870         int r;
1871
1872         /* update timestamp */
1873         paths_check_timestamp(NETWORK_DIRS, &m->network_dirs_ts_usec, true);
1874
1875         r = netdev_load(m, false);
1876         if (r < 0)
1877                 return r;
1878
1879         r = network_load(m, &m->networks);
1880         if (r < 0)
1881                 return r;
1882
1883         return 0;
1884 }
1885
1886 bool manager_should_reload(Manager *m) {
1887         return paths_check_timestamp(NETWORK_DIRS, &m->network_dirs_ts_usec, false);
1888 }
1889
1890 int manager_rtnl_enumerate_links(Manager *m) {
1891         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1892         sd_netlink_message *link;
1893         int r;
1894
1895         assert(m);
1896         assert(m->rtnl);
1897
1898         r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);
1899         if (r < 0)
1900                 return r;
1901
1902         r = sd_netlink_message_request_dump(req, true);
1903         if (r < 0)
1904                 return r;
1905
1906         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1907         if (r < 0)
1908                 return r;
1909
1910         for (link = reply; link; link = sd_netlink_message_next(link)) {
1911                 int k;
1912
1913                 m->enumerating = true;
1914
1915                 k = manager_rtnl_process_link(m->rtnl, link, m);
1916                 if (k < 0)
1917                         r = k;
1918
1919                 m->enumerating = false;
1920         }
1921
1922         return r;
1923 }
1924
1925 int manager_rtnl_enumerate_addresses(Manager *m) {
1926         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1927         sd_netlink_message *addr;
1928         int r;
1929
1930         assert(m);
1931         assert(m->rtnl);
1932
1933         r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, 0);
1934         if (r < 0)
1935                 return r;
1936
1937         r = sd_netlink_message_request_dump(req, true);
1938         if (r < 0)
1939                 return r;
1940
1941         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1942         if (r < 0)
1943                 return r;
1944
1945         for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
1946                 int k;
1947
1948                 m->enumerating = true;
1949
1950                 k = manager_rtnl_process_address(m->rtnl, addr, m);
1951                 if (k < 0)
1952                         r = k;
1953
1954                 m->enumerating = false;
1955         }
1956
1957         return r;
1958 }
1959
1960 int manager_rtnl_enumerate_neighbors(Manager *m) {
1961         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1962         sd_netlink_message *neigh;
1963         int r;
1964
1965         assert(m);
1966         assert(m->rtnl);
1967
1968         r = sd_rtnl_message_new_neigh(m->rtnl, &req, RTM_GETNEIGH, 0, AF_UNSPEC);
1969         if (r < 0)
1970                 return r;
1971
1972         r = sd_netlink_message_request_dump(req, true);
1973         if (r < 0)
1974                 return r;
1975
1976         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1977         if (r < 0)
1978                 return r;
1979
1980         for (neigh = reply; neigh; neigh = sd_netlink_message_next(neigh)) {
1981                 int k;
1982
1983                 m->enumerating = true;
1984
1985                 k = manager_rtnl_process_neighbor(m->rtnl, neigh, m);
1986                 if (k < 0)
1987                         r = k;
1988
1989                 m->enumerating = false;
1990         }
1991
1992         return r;
1993 }
1994
1995 int manager_rtnl_enumerate_routes(Manager *m) {
1996         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1997         sd_netlink_message *route;
1998         int r;
1999
2000         assert(m);
2001         assert(m->rtnl);
2002
2003         r = sd_rtnl_message_new_route(m->rtnl, &req, RTM_GETROUTE, 0, 0);
2004         if (r < 0)
2005                 return r;
2006
2007         r = sd_netlink_message_request_dump(req, true);
2008         if (r < 0)
2009                 return r;
2010
2011         r = sd_netlink_call(m->rtnl, req, 0, &reply);
2012         if (r < 0)
2013                 return r;
2014
2015         for (route = reply; route; route = sd_netlink_message_next(route)) {
2016                 int k;
2017
2018                 m->enumerating = true;
2019
2020                 k = manager_rtnl_process_route(m->rtnl, route, m);
2021                 if (k < 0)
2022                         r = k;
2023
2024                 m->enumerating = false;
2025         }
2026
2027         return r;
2028 }
2029
2030 int manager_rtnl_enumerate_rules(Manager *m) {
2031         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2032         sd_netlink_message *rule;
2033         int r;
2034
2035         assert(m);
2036         assert(m->rtnl);
2037
2038         r = sd_rtnl_message_new_routing_policy_rule(m->rtnl, &req, RTM_GETRULE, 0);
2039         if (r < 0)
2040                 return r;
2041
2042         r = sd_netlink_message_request_dump(req, true);
2043         if (r < 0)
2044                 return r;
2045
2046         r = sd_netlink_call(m->rtnl, req, 0, &reply);
2047         if (r < 0) {
2048                 if (r == -EOPNOTSUPP) {
2049                         log_debug("FIB Rules are not supported by the kernel. Ignoring.");
2050                         return 0;
2051                 }
2052
2053                 return r;
2054         }
2055
2056         for (rule = reply; rule; rule = sd_netlink_message_next(rule)) {
2057                 int k;
2058
2059                 m->enumerating = true;
2060
2061                 k = manager_rtnl_process_rule(m->rtnl, rule, m);
2062                 if (k < 0)
2063                         r = k;
2064
2065                 m->enumerating = false;
2066         }
2067
2068         return r;
2069 }
2070
2071 int manager_rtnl_enumerate_nexthop(Manager *m) {
2072         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2073         sd_netlink_message *nexthop;
2074         int r;
2075
2076         assert(m);
2077         assert(m->rtnl);
2078
2079         r = sd_rtnl_message_new_nexthop(m->rtnl, &req, RTM_GETNEXTHOP, 0, 0);
2080         if (r < 0)
2081                 return r;
2082
2083         r = sd_netlink_message_request_dump(req, true);
2084         if (r < 0)
2085                 return r;
2086
2087         r = sd_netlink_call(m->rtnl, req, 0, &reply);
2088         if (r < 0) {
2089                 if (r == -EOPNOTSUPP) {
2090                         log_debug("Nexthop are not supported by the kernel. Ignoring.");
2091                         return 0;
2092                 }
2093
2094                 return r;
2095         }
2096
2097         for (nexthop = reply; nexthop; nexthop = sd_netlink_message_next(nexthop)) {
2098                 int k;
2099
2100                 m->enumerating = true;
2101
2102                 k = manager_rtnl_process_nexthop(m->rtnl, nexthop, m);
2103                 if (k < 0)
2104                         r = k;
2105
2106                 m->enumerating = false;
2107         }
2108
2109         return r;
2110 }
2111
2112 int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, union in_addr_union *found) {
2113         AddressPool *p;
2114         int r;
2115
2116         assert(m);
2117         assert(prefixlen > 0);
2118         assert(found);
2119
2120         LIST_FOREACH(address_pools, p, m->address_pools) {
2121                 if (p->family != family)
2122                         continue;
2123
2124                 r = address_pool_acquire(p, prefixlen, found);
2125                 if (r != 0)
2126                         return r;
2127         }
2128
2129         return 0;
2130 }
2131
2132 Link* manager_find_uplink(Manager *m, Link *exclude) {
2133         _cleanup_free_ struct local_address *gateways = NULL;
2134         int n, i;
2135
2136         assert(m);
2137
2138         /* Looks for a suitable "uplink", via black magic: an
2139          * interface that is up and where the default route with the
2140          * highest priority points to. */
2141
2142         n = local_gateways(m->rtnl, 0, AF_UNSPEC, &gateways);
2143         if (n < 0) {
2144                 log_warning_errno(n, "Failed to determine list of default gateways: %m");
2145                 return NULL;
2146         }
2147
2148         for (i = 0; i < n; i++) {
2149                 Link *link;
2150
2151                 link = hashmap_get(m->links, INT_TO_PTR(gateways[i].ifindex));
2152                 if (!link) {
2153                         log_debug("Weird, found a gateway for a link we don't know. Ignoring.");
2154                         continue;
2155                 }
2156
2157                 if (link == exclude)
2158                         continue;
2159
2160                 if (link->operstate < LINK_OPERSTATE_ROUTABLE)
2161                         continue;
2162
2163                 return link;
2164         }
2165
2166         return NULL;
2167 }
2168
2169 void manager_dirty(Manager *manager) {
2170         assert(manager);
2171
2172         /* the serialized state in /run is no longer up-to-date */
2173         manager->dirty = true;
2174 }
2175
2176 static int set_hostname_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2177         Manager *manager = userdata;
2178         const sd_bus_error *e;
2179
2180         assert(m);
2181         assert(manager);
2182
2183         e = sd_bus_message_get_error(m);
2184         if (e)
2185                 log_warning_errno(sd_bus_error_get_errno(e), "Could not set hostname: %s", e->message);
2186
2187         return 1;
2188 }
2189
2190 int manager_set_hostname(Manager *m, const char *hostname) {
2191         int r;
2192
2193         log_debug("Setting transient hostname: '%s'", strna(hostname));
2194
2195         if (free_and_strdup(&m->dynamic_hostname, hostname) < 0)
2196                 return log_oom();
2197
2198         if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
2199                 log_debug("Not connected to system bus, setting hostname later.");
2200                 return 0;
2201         }
2202
2203         r = sd_bus_call_method_async(
2204                         m->bus,
2205                         NULL,
2206                         "org.freedesktop.hostname1",
2207                         "/org/freedesktop/hostname1",
2208                         "org.freedesktop.hostname1",
2209                         "SetHostname",
2210                         set_hostname_handler,
2211                         m,
2212                         "sb",
2213                         hostname,
2214                         false);
2215
2216         if (r < 0)
2217                 return log_error_errno(r, "Could not set transient hostname: %m");
2218
2219         return 0;
2220 }
2221
2222 static int set_timezone_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2223         Manager *manager = userdata;
2224         const sd_bus_error *e;
2225
2226         assert(m);
2227         assert(manager);
2228
2229         e = sd_bus_message_get_error(m);
2230         if (e)
2231                 log_warning_errno(sd_bus_error_get_errno(e), "Could not set timezone: %s", e->message);
2232
2233         return 1;
2234 }
2235
2236 int manager_set_timezone(Manager *m, const char *tz) {
2237         int r;
2238
2239         assert(m);
2240         assert(tz);
2241
2242         log_debug("Setting system timezone: '%s'", tz);
2243         if (free_and_strdup(&m->dynamic_timezone, tz) < 0)
2244                 return log_oom();
2245
2246         if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
2247                 log_debug("Not connected to system bus, setting timezone later.");
2248                 return 0;
2249         }
2250
2251         r = sd_bus_call_method_async(
2252                         m->bus,
2253                         NULL,
2254                         "org.freedesktop.timedate1",
2255                         "/org/freedesktop/timedate1",
2256                         "org.freedesktop.timedate1",
2257                         "SetTimezone",
2258                         set_timezone_handler,
2259                         m,
2260                         "sb",
2261                         tz,
2262                         false);
2263         if (r < 0)
2264                 return log_error_errno(r, "Could not set timezone: %m");
2265
2266         return 0;
2267 }
2268
2269 int manager_request_product_uuid(Manager *m, Link *link) {
2270         int r;
2271
2272         assert(m);
2273
2274         if (m->has_product_uuid)
2275                 return 0;
2276
2277         log_debug("Requesting product UUID");
2278
2279         if (link) {
2280                 DUID *duid;
2281
2282                 assert_se(duid = link_get_duid(link));
2283
2284                 r = set_ensure_allocated(&m->links_requesting_uuid, NULL);
2285                 if (r < 0)
2286                         return log_oom();
2287
2288                 r = set_ensure_allocated(&m->duids_requesting_uuid, NULL);
2289                 if (r < 0)
2290                         return log_oom();
2291
2292                 r = set_put(m->links_requesting_uuid, link);
2293                 if (r < 0)
2294                         return log_oom();
2295
2296                 r = set_put(m->duids_requesting_uuid, duid);
2297                 if (r < 0)
2298                         return log_oom();
2299
2300                 link_ref(link);
2301         }
2302
2303         if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
2304                 log_debug("Not connected to system bus, requesting product UUID later.");
2305                 return 0;
2306         }
2307
2308         r = sd_bus_call_method_async(
2309                         m->bus,
2310                         NULL,
2311                         "org.freedesktop.hostname1",
2312                         "/org/freedesktop/hostname1",
2313                         "org.freedesktop.hostname1",
2314                         "GetProductUUID",
2315                         get_product_uuid_handler,
2316                         m,
2317                         "b",
2318                         false);
2319         if (r < 0)
2320                 return log_warning_errno(r, "Failed to get product UUID: %m");
2321
2322         return 0;
2323 }