src/network/networkd-manager.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <netinet/in.h>
   4 #include <sys/socket.h>
   5 #include <unistd.h>
   6 #include <linux/if.h>
   7 #include <linux/fib_rules.h>
   8
   9 #include "sd-daemon.h"
  10 #include "sd-netlink.h"
  11
  12 #include "alloc-util.h"
  13 #include "bus-util.h"
  14 #include "conf-parser.h"
  15 #include "def.h"
  16 #include "device-private.h"
  17 #include "device-util.h"
  18 #include "dns-domain.h"
  19 #include "fd-util.h"
  20 #include "fileio.h"
  21 #include "local-addresses.h"
  22 #include "netlink-util.h"
  23 #include "network-internal.h"
  24 #include "networkd-manager.h"
  25 #include "networkd-speed-meter.h"
  26 #include "ordered-set.h"
  27 #include "path-util.h"
  28 #include "set.h"
  29 #include "strv.h"
  30 #include "sysctl-util.h"
  31 #include "tmpfile-util.h"
  32 #include "udev-util.h"
  33 #include "virt.h"
  34
  35 /* use 8 MB for receive socket kernel queue. */
  36 #define RCVBUF_SIZE    (8*1024*1024)
  37
  38 static int setup_default_address_pool(Manager *m) {
  39         AddressPool *p;
  40         int r;
  41
  42         assert(m);
  43
  44         /* Add in the well-known private address ranges. */
  45
  46         r = address_pool_new_from_string(m, &p, AF_INET6, "fd00::", 8);
  47         if (r < 0)
  48                 return r;
  49
  50         r = address_pool_new_from_string(m, &p, AF_INET, "10.0.0.0", 8);
  51         if (r < 0)
  52                 return r;
  53
  54         r = address_pool_new_from_string(m, &p, AF_INET, "172.16.0.0", 12);
  55         if (r < 0)
  56                 return r;
  57
  58         r = address_pool_new_from_string(m, &p, AF_INET, "192.168.0.0", 16);
  59         if (r < 0)
  60                 return r;
  61
  62         return 0;
  63 }
  64
  65 static int manager_reset_all(Manager *m) {
  66         Link *link;
  67         Iterator i;
  68         int r;
  69
  70         assert(m);
  71
  72         HASHMAP_FOREACH(link, m->links, i) {
  73                 r = link_carrier_reset(link);
  74                 if (r < 0)
  75                         log_link_warning_errno(link, r, "Could not reset carrier: %m");
  76         }
  77
  78         return 0;
  79 }
  80
  81 static int match_prepare_for_sleep(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
  82         Manager *m = userdata;
  83         int b, r;
  84
  85         assert(message);
  86         assert(m);
  87
  88         r = sd_bus_message_read(message, "b", &b);
  89         if (r < 0) {
  90                 log_debug_errno(r, "Failed to parse PrepareForSleep signal: %m");
  91                 return 0;
  92         }
  93
  94         if (b)
  95                 return 0;
  96
  97         log_debug("Coming back from suspend, resetting all connections...");
  98
  99         (void) manager_reset_all(m);
 100
 101         return 0;
 102 }
 103
 104 static int on_connected(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
 105         Manager *m = userdata;
 106
 107         assert(message);
 108         assert(m);
 109
 110         /* Did we get a timezone or transient hostname from DHCP while D-Bus wasn't up yet? */
 111         if (m->dynamic_hostname)
 112                 (void) manager_set_hostname(m, m->dynamic_hostname);
 113         if (m->dynamic_timezone)
 114                 (void) manager_set_timezone(m, m->dynamic_timezone);
 115         if (m->links_requesting_uuid)
 116                 (void) manager_request_product_uuid(m, NULL);
 117
 118         return 0;
 119 }
 120
 121 int manager_connect_bus(Manager *m) {
 122         int r;
 123
 124         assert(m);
 125
 126         if (m->bus)
 127                 return 0;
 128
 129         r = bus_open_system_watch_bind_with_description(&m->bus, "bus-api-network");
 130         if (r < 0)
 131                 return log_error_errno(r, "Failed to connect to bus: %m");
 132
 133         r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/network1", "org.freedesktop.network1.Manager", manager_vtable, m);
 134         if (r < 0)
 135                 return log_error_errno(r, "Failed to add manager object vtable: %m");
 136
 137         r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/link", "org.freedesktop.network1.Link", link_vtable, link_object_find, m);
 138         if (r < 0)
 139                return log_error_errno(r, "Failed to add link object vtable: %m");
 140
 141         r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/link", link_node_enumerator, m);
 142         if (r < 0)
 143                 return log_error_errno(r, "Failed to add link enumerator: %m");
 144
 145         r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/network", "org.freedesktop.network1.Network", network_vtable, network_object_find, m);
 146         if (r < 0)
 147                return log_error_errno(r, "Failed to add network object vtable: %m");
 148
 149         r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/network", network_node_enumerator, m);
 150         if (r < 0)
 151                 return log_error_errno(r, "Failed to add network enumerator: %m");
 152
 153         r = sd_bus_request_name_async(m->bus, NULL, "org.freedesktop.network1", 0, NULL, NULL);
 154         if (r < 0)
 155                 return log_error_errno(r, "Failed to request name: %m");
 156
 157         r = sd_bus_attach_event(m->bus, m->event, 0);
 158         if (r < 0)
 159                 return log_error_errno(r, "Failed to attach bus to event loop: %m");
 160
 161         r = sd_bus_match_signal_async(
 162                         m->bus,
 163                         NULL,
 164                         "org.freedesktop.DBus.Local",
 165                         NULL,
 166                         "org.freedesktop.DBus.Local",
 167                         "Connected",
 168                         on_connected, NULL, m);
 169         if (r < 0)
 170                 return log_error_errno(r, "Failed to request match on Connected signal: %m");
 171
 172         r = sd_bus_match_signal_async(
 173                         m->bus,
 174                         NULL,
 175                         "org.freedesktop.login1",
 176                         "/org/freedesktop/login1",
 177                         "org.freedesktop.login1.Manager",
 178                         "PrepareForSleep",
 179                         match_prepare_for_sleep, NULL, m);
 180         if (r < 0)
 181                 log_warning_errno(r, "Failed to request match for PrepareForSleep, ignoring: %m");
 182
 183         return 0;
 184 }
 185
 186 static int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) {
 187         Manager *m = userdata;
 188         DeviceAction action;
 189         Link *link = NULL;
 190         int r, ifindex;
 191
 192         assert(m);
 193         assert(device);
 194
 195         r = device_get_action(device, &action);
 196         if (r < 0) {
 197                 log_device_debug_errno(device, r, "Failed to get udev action, ignoring device: %m");
 198                 return 0;
 199         }
 200
 201         if (!IN_SET(action, DEVICE_ACTION_ADD, DEVICE_ACTION_CHANGE, DEVICE_ACTION_MOVE)) {
 202                 log_device_debug(device, "Ignoring udev %s event for device.", device_action_to_string(action));
 203                 return 0;
 204         }
 205
 206         r = sd_device_get_ifindex(device, &ifindex);
 207         if (r < 0) {
 208                 log_device_debug_errno(device, r, "Ignoring udev ADD event for device without ifindex or with invalid ifindex: %m");
 209                 return 0;
 210         }
 211
 212         r = device_is_renaming(device);
 213         if (r < 0) {
 214                 log_device_error_errno(device, r, "Failed to determine the device is renamed or not, ignoring '%s' uevent: %m",
 215                                        device_action_to_string(action));
 216                 return 0;
 217         }
 218         if (r > 0) {
 219                 log_device_debug(device, "Interface is under renaming, wait for the interface to be renamed: %m");
 220                 return 0;
 221         }
 222
 223         r = link_get(m, ifindex, &link);
 224         if (r < 0) {
 225                 if (r != -ENODEV)
 226                         log_debug_errno(r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
 227                 return 0;
 228         }
 229
 230         (void) link_initialized(link, device);
 231
 232         return 0;
 233 }
 234
 235 static int manager_connect_udev(Manager *m) {
 236         int r;
 237
 238         /* udev does not initialize devices inside containers,
 239          * so we rely on them being already initialized before
 240          * entering the container */
 241         if (detect_container() > 0)
 242                 return 0;
 243
 244         r = sd_device_monitor_new(&m->device_monitor);
 245         if (r < 0)
 246                 return log_error_errno(r, "Failed to initialize device monitor: %m");
 247
 248         r = sd_device_monitor_filter_add_match_subsystem_devtype(m->device_monitor, "net", NULL);
 249         if (r < 0)
 250                 return log_error_errno(r, "Could not add device monitor filter: %m");
 251
 252         r = sd_device_monitor_attach_event(m->device_monitor, m->event);
 253         if (r < 0)
 254                 return log_error_errno(r, "Failed to attach event to device monitor: %m");
 255
 256         r = sd_device_monitor_start(m->device_monitor, manager_udev_process_link, m);
 257         if (r < 0)
 258                 return log_error_errno(r, "Failed to start device monitor: %m");
 259
 260         return 0;
 261 }
 262
 263 int manager_rtnl_process_route(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 264         Manager *m = userdata;
 265         Link *link = NULL;
 266         uint16_t type;
 267         uint32_t ifindex, priority = 0;
 268         unsigned char protocol, scope, tos, table, rt_type;
 269         int family;
 270         unsigned char dst_prefixlen, src_prefixlen;
 271         union in_addr_union dst = IN_ADDR_NULL, gw = IN_ADDR_NULL, src = IN_ADDR_NULL, prefsrc = IN_ADDR_NULL;
 272         Route *route = NULL;
 273         int r;
 274
 275         assert(rtnl);
 276         assert(message);
 277         assert(m);
 278
 279         if (sd_netlink_message_is_error(message)) {
 280                 r = sd_netlink_message_get_errno(message);
 281                 if (r < 0)
 282                         log_warning_errno(r, "rtnl: failed to receive route, ignoring: %m");
 283
 284                 return 0;
 285         }
 286
 287         r = sd_netlink_message_get_type(message, &type);
 288         if (r < 0) {
 289                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
 290                 return 0;
 291         } else if (!IN_SET(type, RTM_NEWROUTE, RTM_DELROUTE)) {
 292                 log_warning("rtnl: received unexpected message type when processing route, ignoring");
 293                 return 0;
 294         }
 295
 296         r = sd_netlink_message_read_u32(message, RTA_OIF, &ifindex);
 297         if (r == -ENODATA) {
 298                 log_debug("rtnl: received route without ifindex, ignoring");
 299                 return 0;
 300         } else if (r < 0) {
 301                 log_warning_errno(r, "rtnl: could not get ifindex from route, ignoring: %m");
 302                 return 0;
 303         } else if (ifindex <= 0) {
 304                 log_warning("rtnl: received route message with invalid ifindex, ignoring: %d", ifindex);
 305                 return 0;
 306         } else {
 307                 r = link_get(m, ifindex, &link);
 308                 if (r < 0 || !link) {
 309                         /* when enumerating we might be out of sync, but we will
 310                          * get the route again, so just ignore it */
 311                         if (!m->enumerating)
 312                                 log_warning("rtnl: received route for nonexistent link (%d), ignoring", ifindex);
 313                         return 0;
 314                 }
 315         }
 316
 317         r = sd_rtnl_message_route_get_family(message, &family);
 318         if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) {
 319                 log_link_warning(link, "rtnl: received address with invalid family, ignoring");
 320                 return 0;
 321         }
 322
 323         r = sd_rtnl_message_route_get_protocol(message, &protocol);
 324         if (r < 0) {
 325                 log_warning_errno(r, "rtnl: could not get route protocol: %m");
 326                 return 0;
 327         }
 328
 329         switch (family) {
 330         case AF_INET:
 331                 r = sd_netlink_message_read_in_addr(message, RTA_DST, &dst.in);
 332                 if (r < 0 && r != -ENODATA) {
 333                         log_link_warning_errno(link, r, "rtnl: received route without valid destination, ignoring: %m");
 334                         return 0;
 335                 }
 336
 337                 r = sd_netlink_message_read_in_addr(message, RTA_GATEWAY, &gw.in);
 338                 if (r < 0 && r != -ENODATA) {
 339                         log_link_warning_errno(link, r, "rtnl: received route with invalid gateway, ignoring: %m");
 340                         return 0;
 341                 }
 342
 343                 r = sd_netlink_message_read_in_addr(message, RTA_SRC, &src.in);
 344                 if (r < 0 && r != -ENODATA) {
 345                         log_link_warning_errno(link, r, "rtnl: received route with invalid source, ignoring: %m");
 346                         return 0;
 347                 }
 348
 349                 r = sd_netlink_message_read_in_addr(message, RTA_PREFSRC, &prefsrc.in);
 350                 if (r < 0 && r != -ENODATA) {
 351                         log_link_warning_errno(link, r, "rtnl: received route with invalid preferred source, ignoring: %m");
 352                         return 0;
 353                 }
 354
 355                 break;
 356
 357         case AF_INET6:
 358                 r = sd_netlink_message_read_in6_addr(message, RTA_DST, &dst.in6);
 359                 if (r < 0 && r != -ENODATA) {
 360                         log_link_warning_errno(link, r, "rtnl: received route without valid destination, ignoring: %m");
 361                         return 0;
 362                 }
 363
 364                 r = sd_netlink_message_read_in6_addr(message, RTA_GATEWAY, &gw.in6);
 365                 if (r < 0 && r != -ENODATA) {
 366                         log_link_warning_errno(link, r, "rtnl: received route with invalid gateway, ignoring: %m");
 367                         return 0;
 368                 }
 369
 370                 r = sd_netlink_message_read_in6_addr(message, RTA_SRC, &src.in6);
 371                 if (r < 0 && r != -ENODATA) {
 372                         log_link_warning_errno(link, r, "rtnl: received route with invalid source, ignoring: %m");
 373                         return 0;
 374                 }
 375
 376                 r = sd_netlink_message_read_in6_addr(message, RTA_PREFSRC, &prefsrc.in6);
 377                 if (r < 0 && r != -ENODATA) {
 378                         log_link_warning_errno(link, r, "rtnl: received route with invalid preferred source, ignoring: %m");
 379                         return 0;
 380                 }
 381
 382                 break;
 383
 384         default:
 385                 assert_not_reached("Received unsupported address family");
 386                 return 0;
 387         }
 388
 389         r = sd_rtnl_message_route_get_dst_prefixlen(message, &dst_prefixlen);
 390         if (r < 0) {
 391                 log_link_warning_errno(link, r, "rtnl: received route with invalid destination prefixlen, ignoring: %m");
 392                 return 0;
 393         }
 394
 395         r = sd_rtnl_message_route_get_src_prefixlen(message, &src_prefixlen);
 396         if (r < 0) {
 397                 log_link_warning_errno(link, r, "rtnl: received route with invalid source prefixlen, ignoring: %m");
 398                 return 0;
 399         }
 400
 401         r = sd_rtnl_message_route_get_scope(message, &scope);
 402         if (r < 0) {
 403                 log_link_warning_errno(link, r, "rtnl: received route with invalid scope, ignoring: %m");
 404                 return 0;
 405         }
 406
 407         r = sd_rtnl_message_route_get_tos(message, &tos);
 408         if (r < 0) {
 409                 log_link_warning_errno(link, r, "rtnl: received route with invalid tos, ignoring: %m");
 410                 return 0;
 411         }
 412
 413         r = sd_rtnl_message_route_get_type(message, &rt_type);
 414         if (r < 0) {
 415                 log_link_warning_errno(link, r, "rtnl: received route with invalid type, ignoring: %m");
 416                 return 0;
 417         }
 418
 419         r = sd_rtnl_message_route_get_table(message, &table);
 420         if (r < 0) {
 421                 log_link_warning_errno(link, r, "rtnl: received route with invalid table, ignoring: %m");
 422                 return 0;
 423         }
 424
 425         r = sd_netlink_message_read_u32(message, RTA_PRIORITY, &priority);
 426         if (r < 0 && r != -ENODATA) {
 427                 log_link_warning_errno(link, r, "rtnl: received route with invalid priority, ignoring: %m");
 428                 return 0;
 429         }
 430
 431         (void) route_get(link, family, &dst, dst_prefixlen, tos, priority, table, &route);
 432
 433         if (DEBUG_LOGGING) {
 434                 _cleanup_free_ char *buf_dst = NULL, *buf_dst_prefixlen = NULL,
 435                         *buf_src = NULL, *buf_gw = NULL, *buf_prefsrc = NULL;
 436
 437                 if (!in_addr_is_null(family, &dst)) {
 438                         (void) in_addr_to_string(family, &dst, &buf_dst);
 439                         (void) asprintf(&buf_dst_prefixlen, "/%u", dst_prefixlen);
 440                 }
 441                 if (!in_addr_is_null(family, &src))
 442                         (void) in_addr_to_string(family, &src, &buf_src);
 443                 if (!in_addr_is_null(family, &gw))
 444                         (void) in_addr_to_string(family, &gw, &buf_gw);
 445                 if (!in_addr_is_null(family, &prefsrc))
 446                         (void) in_addr_to_string(family, &prefsrc, &buf_prefsrc);
 447
 448                 log_link_debug(link,
 449                                "%s route: dst: %s%s, src: %s, gw: %s, prefsrc: %s",
 450                                type == RTM_DELROUTE ? "Removing" : route ? "Updating" : "Adding",
 451                                strna(buf_dst), strempty(buf_dst_prefixlen),
 452                                strna(buf_src), strna(buf_gw), strna(buf_prefsrc));
 453         }
 454
 455         switch (type) {
 456         case RTM_NEWROUTE:
 457                 if (!route) {
 458                         /* A route appeared that we did not request */
 459                         r = route_add_foreign(link, family, &dst, dst_prefixlen, tos, priority, table, &route);
 460                         if (r < 0) {
 461                                 log_link_warning_errno(link, r, "Failed to add route, ignoring: %m");
 462                                 return 0;
 463                         }
 464                 }
 465
 466                 route_update(route, &src, src_prefixlen, &gw, &prefsrc, scope, protocol, rt_type);
 467
 468                 break;
 469
 470         case RTM_DELROUTE:
 471                 route_free(route);
 472                 break;
 473
 474         default:
 475                 assert_not_reached("Received invalid RTNL message type");
 476         }
 477
 478         return 1;
 479 }
 480
 481 int manager_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 482         _cleanup_free_ char *buf = NULL;
 483         Manager *m = userdata;
 484         Link *link = NULL;
 485         uint16_t type;
 486         unsigned char flags, prefixlen, scope;
 487         union in_addr_union in_addr = IN_ADDR_NULL;
 488         struct ifa_cacheinfo cinfo;
 489         Address *address = NULL;
 490         char valid_buf[FORMAT_TIMESPAN_MAX];
 491         const char *valid_str = NULL;
 492         int ifindex, family, r;
 493
 494         assert(rtnl);
 495         assert(message);
 496         assert(m);
 497
 498         if (sd_netlink_message_is_error(message)) {
 499                 r = sd_netlink_message_get_errno(message);
 500                 if (r < 0)
 501                         log_warning_errno(r, "rtnl: failed to receive address, ignoring: %m");
 502
 503                 return 0;
 504         }
 505
 506         r = sd_netlink_message_get_type(message, &type);
 507         if (r < 0) {
 508                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
 509                 return 0;
 510         } else if (!IN_SET(type, RTM_NEWADDR, RTM_DELADDR)) {
 511                 log_warning("rtnl: received unexpected message type when processing address, ignoring");
 512                 return 0;
 513         }
 514
 515         r = sd_rtnl_message_addr_get_ifindex(message, &ifindex);
 516         if (r < 0) {
 517                 log_warning_errno(r, "rtnl: could not get ifindex from address, ignoring: %m");
 518                 return 0;
 519         } else if (ifindex <= 0) {
 520                 log_warning("rtnl: received address message with invalid ifindex, ignoring: %d", ifindex);
 521                 return 0;
 522         } else {
 523                 r = link_get(m, ifindex, &link);
 524                 if (r < 0 || !link) {
 525                         /* when enumerating we might be out of sync, but we will
 526                          * get the address again, so just ignore it */
 527                         if (!m->enumerating)
 528                                 log_warning("rtnl: received address for nonexistent link (%d), ignoring", ifindex);
 529                         return 0;
 530                 }
 531         }
 532
 533         r = sd_rtnl_message_addr_get_family(message, &family);
 534         if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) {
 535                 log_link_warning(link, "rtnl: received address with invalid family, ignoring");
 536                 return 0;
 537         }
 538
 539         r = sd_rtnl_message_addr_get_prefixlen(message, &prefixlen);
 540         if (r < 0) {
 541                 log_link_warning_errno(link, r, "rtnl: received address with invalid prefixlen, ignoring: %m");
 542                 return 0;
 543         }
 544
 545         r = sd_rtnl_message_addr_get_scope(message, &scope);
 546         if (r < 0) {
 547                 log_link_warning_errno(link, r, "rtnl: received address with invalid scope, ignoring: %m");
 548                 return 0;
 549         }
 550
 551         r = sd_rtnl_message_addr_get_flags(message, &flags);
 552         if (r < 0) {
 553                 log_link_warning_errno(link, r, "rtnl: received address with invalid flags, ignoring: %m");
 554                 return 0;
 555         }
 556
 557         switch (family) {
 558         case AF_INET:
 559                 r = sd_netlink_message_read_in_addr(message, IFA_LOCAL, &in_addr.in);
 560                 if (r < 0) {
 561                         log_link_warning_errno(link, r, "rtnl: received address without valid address, ignoring: %m");
 562                         return 0;
 563                 }
 564
 565                 break;
 566
 567         case AF_INET6:
 568                 r = sd_netlink_message_read_in6_addr(message, IFA_ADDRESS, &in_addr.in6);
 569                 if (r < 0) {
 570                         log_link_warning_errno(link, r, "rtnl: received address without valid address, ignoring: %m");
 571                         return 0;
 572                 }
 573
 574                 break;
 575
 576         default:
 577                 assert_not_reached("Received unsupported address family");
 578         }
 579
 580         r = in_addr_to_string(family, &in_addr, &buf);
 581         if (r < 0) {
 582                 log_link_warning_errno(link, r, "Could not print address, ignoring: %m");
 583                 return 0;
 584         }
 585
 586         r = sd_netlink_message_read_cache_info(message, IFA_CACHEINFO, &cinfo);
 587         if (r < 0 && r != -ENODATA) {
 588                 log_link_warning_errno(link, r, "rtnl: cannot get IFA_CACHEINFO attribute, ignoring: %m");
 589                 return 0;
 590         } else if (r >= 0 && cinfo.ifa_valid != CACHE_INFO_INFINITY_LIFE_TIME)
 591                 valid_str = format_timespan(valid_buf, FORMAT_TIMESPAN_MAX,
 592                                             cinfo.ifa_valid * USEC_PER_SEC,
 593                                             USEC_PER_SEC);
 594
 595         (void) address_get(link, family, &in_addr, prefixlen, &address);
 596
 597         switch (type) {
 598         case RTM_NEWADDR:
 599                 if (address)
 600                         log_link_debug(link, "Updating address: %s/%u (valid %s%s)", buf, prefixlen,
 601                                        valid_str ? "for " : "forever", strempty(valid_str));
 602                 else {
 603                         /* An address appeared that we did not request */
 604                         r = address_add_foreign(link, family, &in_addr, prefixlen, &address);
 605                         if (r < 0) {
 606                                 log_link_warning_errno(link, r, "Failed to add address %s/%u, ignoring: %m", buf, prefixlen);
 607                                 return 0;
 608                         } else
 609                                 log_link_debug(link, "Adding address: %s/%u (valid %s%s)", buf, prefixlen,
 610                                                valid_str ? "for " : "forever", strempty(valid_str));
 611                 }
 612
 613                 r = address_update(address, flags, scope, &cinfo);
 614                 if (r < 0) {
 615                         log_link_warning_errno(link, r, "Failed to update address %s/%u, ignoring: %m", buf, prefixlen);
 616                         return 0;
 617                 }
 618
 619                 break;
 620
 621         case RTM_DELADDR:
 622
 623                 if (address) {
 624                         log_link_debug(link, "Removing address: %s/%u (valid %s%s)", buf, prefixlen,
 625                                        valid_str ? "for " : "forever", strempty(valid_str));
 626                         (void) address_drop(address);
 627                 } else
 628                         log_link_warning(link, "Removing non-existent address: %s/%u (valid %s%s), ignoring", buf, prefixlen,
 629                                          valid_str ? "for " : "forever", strempty(valid_str));
 630
 631                 break;
 632         default:
 633                 assert_not_reached("Received invalid RTNL message type");
 634         }
 635
 636         return 1;
 637 }
 638
 639 static int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 640         Manager *m = userdata;
 641         Link *link = NULL;
 642         NetDev *netdev = NULL;
 643         uint16_t type;
 644         const char *name;
 645         int r, ifindex;
 646
 647         assert(rtnl);
 648         assert(message);
 649         assert(m);
 650
 651         if (sd_netlink_message_is_error(message)) {
 652                 r = sd_netlink_message_get_errno(message);
 653                 if (r < 0)
 654                         log_warning_errno(r, "rtnl: Could not receive link, ignoring: %m");
 655
 656                 return 0;
 657         }
 658
 659         r = sd_netlink_message_get_type(message, &type);
 660         if (r < 0) {
 661                 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
 662                 return 0;
 663         } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
 664                 log_warning("rtnl: Received unexpected message type when processing link, ignoring");
 665                 return 0;
 666         }
 667
 668         r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
 669         if (r < 0) {
 670                 log_warning_errno(r, "rtnl: Could not get ifindex from link, ignoring: %m");
 671                 return 0;
 672         } else if (ifindex <= 0) {
 673                 log_warning("rtnl: received link message with invalid ifindex %d, ignoring", ifindex);
 674                 return 0;
 675         }
 676
 677         r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
 678         if (r < 0) {
 679                 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
 680                 return 0;
 681         }
 682
 683         (void) link_get(m, ifindex, &link);
 684         (void) netdev_get(m, name, &netdev);
 685
 686         switch (type) {
 687         case RTM_NEWLINK:
 688                 if (!link) {
 689                         /* link is new, so add it */
 690                         r = link_add(m, message, &link);
 691                         if (r < 0) {
 692                                 log_warning_errno(r, "Could not add new link, ignoring: %m");
 693                                 return 0;
 694                         }
 695                 }
 696
 697                 if (netdev) {
 698                         /* netdev exists, so make sure the ifindex matches */
 699                         r = netdev_set_ifindex(netdev, message);
 700                         if (r < 0) {
 701                                 log_warning_errno(r, "Could not set ifindex on netdev, ignoring: %m");
 702                                 return 0;
 703                         }
 704                 }
 705
 706                 r = link_update(link, message);
 707                 if (r < 0) {
 708                         log_warning_errno(r, "Could not update link, ignoring: %m");
 709                         return 0;
 710                 }
 711
 712                 break;
 713
 714         case RTM_DELLINK:
 715                 link_drop(link);
 716                 netdev_drop(netdev);
 717
 718                 break;
 719
 720         default:
 721                 assert_not_reached("Received invalid RTNL message type.");
 722         }
 723
 724         return 1;
 725 }
 726
 727 int manager_rtnl_process_rule(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 728         uint8_t tos = 0, to_prefixlen = 0, from_prefixlen = 0, protocol = 0;
 729         struct fib_rule_port_range sport = {}, dport = {};
 730         union in_addr_union to = IN_ADDR_NULL, from = IN_ADDR_NULL;
 731         RoutingPolicyRule *rule = NULL;
 732         uint32_t fwmark = 0, table = 0;
 733         const char *iif = NULL, *oif = NULL;
 734         Manager *m = userdata;
 735         uint16_t type;
 736         int family;
 737         int r;
 738
 739         assert(rtnl);
 740         assert(message);
 741         assert(m);
 742
 743         if (sd_netlink_message_is_error(message)) {
 744                 r = sd_netlink_message_get_errno(message);
 745                 if (r < 0)
 746                         log_warning_errno(r, "rtnl: failed to receive rule, ignoring: %m");
 747
 748                 return 0;
 749         }
 750
 751         r = sd_netlink_message_get_type(message, &type);
 752         if (r < 0) {
 753                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
 754                 return 0;
 755         } else if (!IN_SET(type, RTM_NEWRULE, RTM_DELRULE)) {
 756                 log_warning("rtnl: received unexpected message type '%u' when processing rule, ignoring", type);
 757                 return 0;
 758         }
 759
 760         r = sd_rtnl_message_get_family(message, &family);
 761         if (r < 0) {
 762                 log_warning_errno(r, "rtnl: could not get rule family, ignoring: %m");
 763                 return 0;
 764         } else if (!IN_SET(family, AF_INET, AF_INET6)) {
 765                 log_debug("rtnl: received address with invalid family %u, ignoring", family);
 766                 return 0;
 767         }
 768
 769         switch (family) {
 770         case AF_INET:
 771                 r = sd_netlink_message_read_in_addr(message, FRA_SRC, &from.in);
 772                 if (r < 0 && r != -ENODATA) {
 773                         log_warning_errno(r, "rtnl: could not get FRA_SRC attribute, ignoring: %m");
 774                         return 0;
 775                 } else if (r >= 0) {
 776                         r = sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(message, &from_prefixlen);
 777                         if (r < 0) {
 778                                 log_warning_errno(r, "rtnl: failed to retrieve rule from prefix length, ignoring: %m");
 779                                 return 0;
 780                         }
 781                 }
 782
 783                 r = sd_netlink_message_read_in_addr(message, FRA_DST, &to.in);
 784                 if (r < 0 && r != -ENODATA) {
 785                         log_warning_errno(r, "rtnl: could not get FRA_DST attribute, ignoring: %m");
 786                         return 0;
 787                 } else if (r >= 0) {
 788                         r = sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(message, &to_prefixlen);
 789                         if (r < 0) {
 790                                 log_warning_errno(r, "rtnl: failed to retrieve rule to prefix length, ignoring: %m");
 791                                 return 0;
 792                         }
 793                 }
 794
 795                 break;
 796
 797         case AF_INET6:
 798                 r = sd_netlink_message_read_in6_addr(message, FRA_SRC, &from.in6);
 799                 if (r < 0 && r != -ENODATA) {
 800                         log_warning_errno(r, "rtnl: could not get FRA_SRC attribute, ignoring: %m");
 801                         return 0;
 802                 } else if (r >= 0) {
 803                         r = sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(message, &from_prefixlen);
 804                         if (r < 0) {
 805                                 log_warning_errno(r, "rtnl: failed to retrieve rule from prefix length, ignoring: %m");
 806                                 return 0;
 807                         }
 808                 }
 809
 810                 r = sd_netlink_message_read_in6_addr(message, FRA_DST, &to.in6);
 811                 if (r < 0 && r != -ENODATA) {
 812                         log_warning_errno(r, "rtnl: could not get FRA_DST attribute, ignoring: %m");
 813                         return 0;
 814                 } else if (r >= 0) {
 815                         r = sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(message, &to_prefixlen);
 816                         if (r < 0) {
 817                                 log_warning_errno(r, "rtnl: failed to retrieve rule to prefix length, ignoring: %m");
 818                                 return 0;
 819                         }
 820                 }
 821
 822                 break;
 823
 824         default:
 825                 assert_not_reached("Received unsupported address family");
 826         }
 827
 828         if (from_prefixlen == 0 && to_prefixlen == 0)
 829                 return 0;
 830
 831         r = sd_netlink_message_read_u32(message, FRA_FWMARK, &fwmark);
 832         if (r < 0 && r != -ENODATA) {
 833                 log_warning_errno(r, "rtnl: could not get FRA_FWMARK attribute, ignoring: %m");
 834                 return 0;
 835         }
 836
 837         r = sd_netlink_message_read_u32(message, FRA_TABLE, &table);
 838         if (r < 0 && r != -ENODATA) {
 839                 log_warning_errno(r, "rtnl: could not get FRA_TABLE attribute, ignoring: %m");
 840                 return 0;
 841         }
 842
 843         r = sd_rtnl_message_routing_policy_rule_get_tos(message, &tos);
 844         if (r < 0 && r != -ENODATA) {
 845                 log_warning_errno(r, "rtnl: could not get ip rule TOS, ignoring: %m");
 846                 return 0;
 847         }
 848
 849         r = sd_netlink_message_read_string(message, FRA_IIFNAME, &iif);
 850         if (r < 0 && r != -ENODATA) {
 851                 log_warning_errno(r, "rtnl: could not get FRA_IIFNAME attribute, ignoring: %m");
 852                 return 0;
 853         }
 854
 855         r = sd_netlink_message_read_string(message, FRA_OIFNAME, &oif);
 856         if (r < 0 && r != -ENODATA) {
 857                 log_warning_errno(r, "rtnl: could not get FRA_OIFNAME attribute, ignoring: %m");
 858                 return 0;
 859         }
 860
 861         r = sd_netlink_message_read_u8(message, FRA_IP_PROTO, &protocol);
 862         if (r < 0 && r != -ENODATA) {
 863                 log_warning_errno(r, "rtnl: could not get FRA_IP_PROTO attribute, ignoring: %m");
 864                 return 0;
 865         }
 866
 867         r = sd_netlink_message_read(message, FRA_SPORT_RANGE, sizeof(sport), (void *) &sport);
 868         if (r < 0 && r != -ENODATA) {
 869                 log_warning_errno(r, "rtnl: could not get FRA_SPORT_RANGE attribute, ignoring: %m");
 870                 return 0;
 871         }
 872
 873         r = sd_netlink_message_read(message, FRA_DPORT_RANGE, sizeof(dport), (void *) &dport);
 874         if (r < 0 && r != -ENODATA) {
 875                 log_warning_errno(r, "rtnl: could not get FRA_DPORT_RANGE attribute, ignoring: %m");
 876                 return 0;
 877         }
 878
 879         (void) routing_policy_rule_get(m, family, &from, from_prefixlen, &to, to_prefixlen, tos, fwmark, table, iif, oif, protocol, &sport, &dport, &rule);
 880
 881         switch (type) {
 882         case RTM_NEWRULE:
 883                 if (!rule) {
 884                         r = routing_policy_rule_add_foreign(m, family, &from, from_prefixlen, &to, to_prefixlen, tos, fwmark, table, iif, oif, protocol, &sport, &dport, &rule);
 885                         if (r < 0) {
 886                                 log_warning_errno(r, "Could not add rule, ignoring: %m");
 887                                 return 0;
 888                         }
 889                 }
 890                 break;
 891         case RTM_DELRULE:
 892                 routing_policy_rule_free(rule);
 893
 894                 break;
 895
 896         default:
 897                 assert_not_reached("Received invalid RTNL message type");
 898         }
 899
 900         return 1;
 901 }
 902
 903 static int systemd_netlink_fd(void) {
 904         int n, fd, rtnl_fd = -EINVAL;
 905
 906         n = sd_listen_fds(true);
 907         if (n <= 0)
 908                 return -EINVAL;
 909
 910         for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++) {
 911                 if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) {
 912                         if (rtnl_fd >= 0)
 913                                 return -EINVAL;
 914
 915                         rtnl_fd = fd;
 916                 }
 917         }
 918
 919         return rtnl_fd;
 920 }
 921
 922 static int manager_connect_genl(Manager *m) {
 923         int r;
 924
 925         assert(m);
 926
 927         r = sd_genl_socket_open(&m->genl);
 928         if (r < 0)
 929                 return r;
 930
 931         r = sd_netlink_inc_rcvbuf(m->genl, RCVBUF_SIZE);
 932         if (r < 0)
 933                 return r;
 934
 935         r = sd_netlink_attach_event(m->genl, m->event, 0);
 936         if (r < 0)
 937                 return r;
 938
 939         return 0;
 940 }
 941
 942 static int manager_connect_rtnl(Manager *m) {
 943         int fd, r;
 944
 945         assert(m);
 946
 947         fd = systemd_netlink_fd();
 948         if (fd < 0)
 949                 r = sd_netlink_open(&m->rtnl);
 950         else
 951                 r = sd_netlink_open_fd(&m->rtnl, fd);
 952         if (r < 0)
 953                 return r;
 954
 955         r = sd_netlink_inc_rcvbuf(m->rtnl, RCVBUF_SIZE);
 956         if (r < 0)
 957                 return r;
 958
 959         r = sd_netlink_attach_event(m->rtnl, m->event, 0);
 960         if (r < 0)
 961                 return r;
 962
 963         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link");
 964         if (r < 0)
 965                 return r;
 966
 967         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link");
 968         if (r < 0)
 969                 return r;
 970
 971         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address");
 972         if (r < 0)
 973                 return r;
 974
 975         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address");
 976         if (r < 0)
 977                 return r;
 978
 979         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route");
 980         if (r < 0)
 981                 return r;
 982
 983         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route");
 984         if (r < 0)
 985                 return r;
 986
 987         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule");
 988         if (r < 0)
 989                 return r;
 990
 991         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule");
 992         if (r < 0)
 993                 return r;
 994
 995         return 0;
 996 }
 997
 998 static int ordered_set_put_in_addr_data(OrderedSet *s, const struct in_addr_data *address) {
 999         char *p;
1000         int r;
1001
1002         assert(s);
1003         assert(address);
1004
1005         r = in_addr_to_string(address->family, &address->address, &p);
1006         if (r < 0)
1007                 return r;
1008
1009         r = ordered_set_consume(s, p);
1010         if (r == -EEXIST)
1011                 return 0;
1012
1013         return r;
1014 }
1015
1016 static int ordered_set_put_in_addr_datav(OrderedSet *s, const struct in_addr_data *addresses, unsigned n) {
1017         int r, c = 0;
1018         unsigned i;
1019
1020         assert(s);
1021         assert(addresses || n == 0);
1022
1023         for (i = 0; i < n; i++) {
1024                 r = ordered_set_put_in_addr_data(s, addresses+i);
1025                 if (r < 0)
1026                         return r;
1027
1028                 c += r;
1029         }
1030
1031         return c;
1032 }
1033
1034 static int ordered_set_put_in4_addr(OrderedSet *s, const struct in_addr *address) {
1035         char *p;
1036         int r;
1037
1038         assert(s);
1039         assert(address);
1040
1041         r = in_addr_to_string(AF_INET, (const union in_addr_union*) address, &p);
1042         if (r < 0)
1043                 return r;
1044
1045         r = ordered_set_consume(s, p);
1046         if (r == -EEXIST)
1047                 return 0;
1048
1049         return r;
1050 }
1051
1052 static int ordered_set_put_in4_addrv(OrderedSet *s,
1053                                      const struct in_addr *addresses,
1054                                      size_t n,
1055                                      bool (*predicate)(const struct in_addr *addr)) {
1056         int r, c = 0;
1057         size_t i;
1058
1059         assert(s);
1060         assert(n == 0 || addresses);
1061
1062         for (i = 0; i < n; i++) {
1063                 if (predicate && !predicate(&addresses[i]))
1064                         continue;
1065                 r = ordered_set_put_in4_addr(s, addresses+i);
1066                 if (r < 0)
1067                         return r;
1068
1069                 c += r;
1070         }
1071
1072         return c;
1073 }
1074
1075 static int manager_save(Manager *m) {
1076         _cleanup_ordered_set_free_free_ OrderedSet *dns = NULL, *ntp = NULL, *search_domains = NULL, *route_domains = NULL;
1077         Link *link;
1078         Iterator i;
1079         _cleanup_free_ char *temp_path = NULL;
1080         _cleanup_fclose_ FILE *f = NULL;
1081         LinkOperationalState operstate = LINK_OPERSTATE_OFF;
1082         const char *operstate_str;
1083         int r;
1084
1085         assert(m);
1086         assert(m->state_file);
1087
1088         /* We add all NTP and DNS server to a set, to filter out duplicates */
1089         dns = ordered_set_new(&string_hash_ops);
1090         if (!dns)
1091                 return -ENOMEM;
1092
1093         ntp = ordered_set_new(&string_hash_ops);
1094         if (!ntp)
1095                 return -ENOMEM;
1096
1097         search_domains = ordered_set_new(&dns_name_hash_ops);
1098         if (!search_domains)
1099                 return -ENOMEM;
1100
1101         route_domains = ordered_set_new(&dns_name_hash_ops);
1102         if (!route_domains)
1103                 return -ENOMEM;
1104
1105         HASHMAP_FOREACH(link, m->links, i) {
1106                 if (link->flags & IFF_LOOPBACK)
1107                         continue;
1108
1109                 if (link->operstate > operstate)
1110                         operstate = link->operstate;
1111
1112                 if (!link->network)
1113                         continue;
1114
1115                 /* First add the static configured entries */
1116                 r = ordered_set_put_in_addr_datav(dns, link->network->dns, link->network->n_dns);
1117                 if (r < 0)
1118                         return r;
1119
1120                 r = ordered_set_put_strdupv(ntp, link->network->ntp);
1121                 if (r < 0)
1122                         return r;
1123
1124                 r = ordered_set_put_string_set(search_domains, link->network->search_domains);
1125                 if (r < 0)
1126                         return r;
1127
1128                 r = ordered_set_put_string_set(route_domains, link->network->route_domains);
1129                 if (r < 0)
1130                         return r;
1131
1132                 if (!link->dhcp_lease)
1133                         continue;
1134
1135                 /* Secondly, add the entries acquired via DHCP */
1136                 if (link->network->dhcp_use_dns) {
1137                         const struct in_addr *addresses;
1138
1139                         r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
1140                         if (r > 0) {
1141                                 r = ordered_set_put_in4_addrv(dns, addresses, r, in4_addr_is_non_local);
1142                                 if (r < 0)
1143                                         return r;
1144                         } else if (r < 0 && r != -ENODATA)
1145                                 return r;
1146                 }
1147
1148                 if (link->network->dhcp_use_ntp) {
1149                         const struct in_addr *addresses;
1150
1151                         r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
1152                         if (r > 0) {
1153                                 r = ordered_set_put_in4_addrv(ntp, addresses, r, in4_addr_is_non_local);
1154                                 if (r < 0)
1155                                         return r;
1156                         } else if (r < 0 && r != -ENODATA)
1157                                 return r;
1158                 }
1159
1160                 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
1161                         const char *domainname;
1162                         char **domains = NULL;
1163
1164                         OrderedSet *target_domains = (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) ? search_domains : route_domains;
1165                         r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname);
1166                         if (r >= 0) {
1167                                 r = ordered_set_put_strdup(target_domains, domainname);
1168                                 if (r < 0)
1169                                         return r;
1170                         } else if (r != -ENODATA)
1171                                 return r;
1172
1173                         r = sd_dhcp_lease_get_search_domains(link->dhcp_lease, &domains);
1174                         if (r >= 0) {
1175                                 r = ordered_set_put_strdupv(target_domains, domains);
1176                                 if (r < 0)
1177                                         return r;
1178                         } else if (r != -ENODATA)
1179                                 return r;
1180                 }
1181         }
1182
1183         operstate_str = link_operstate_to_string(operstate);
1184         assert(operstate_str);
1185
1186         r = fopen_temporary(m->state_file, &f, &temp_path);
1187         if (r < 0)
1188                 return r;
1189
1190         (void) fchmod(fileno(f), 0644);
1191
1192         fprintf(f,
1193                 "# This is private data. Do not parse.\n"
1194                 "OPER_STATE=%s\n", operstate_str);
1195
1196         ordered_set_print(f, "DNS=", dns);
1197         ordered_set_print(f, "NTP=", ntp);
1198         ordered_set_print(f, "DOMAINS=", search_domains);
1199         ordered_set_print(f, "ROUTE_DOMAINS=", route_domains);
1200
1201         r = routing_policy_serialize_rules(m->rules, f);
1202         if (r < 0)
1203                 goto fail;
1204
1205         r = fflush_and_check(f);
1206         if (r < 0)
1207                 goto fail;
1208
1209         if (rename(temp_path, m->state_file) < 0) {
1210                 r = -errno;
1211                 goto fail;
1212         }
1213
1214         if (m->operational_state != operstate) {
1215                 m->operational_state = operstate;
1216                 r = manager_send_changed(m, "OperationalState", NULL);
1217                 if (r < 0)
1218                         log_error_errno(r, "Could not emit changed OperationalState: %m");
1219         }
1220
1221         m->dirty = false;
1222
1223         return 0;
1224
1225 fail:
1226         (void) unlink(m->state_file);
1227         (void) unlink(temp_path);
1228
1229         return log_error_errno(r, "Failed to save network state to %s: %m", m->state_file);
1230 }
1231
1232 static int manager_dirty_handler(sd_event_source *s, void *userdata) {
1233         Manager *m = userdata;
1234         Link *link;
1235         Iterator i;
1236
1237         assert(m);
1238
1239         if (m->dirty)
1240                 manager_save(m);
1241
1242         SET_FOREACH(link, m->dirty_links, i)
1243                 if (link_save(link) >= 0)
1244                         link_clean(link);
1245
1246         return 1;
1247 }
1248
1249 Link *manager_dhcp6_prefix_get(Manager *m, struct in6_addr *addr) {
1250         assert_return(m, NULL);
1251         assert_return(addr, NULL);
1252
1253         return hashmap_get(m->dhcp6_prefixes, addr);
1254 }
1255
1256 static int dhcp6_route_add_handler(sd_netlink *nl, sd_netlink_message *m, Link *link) {
1257         int r;
1258
1259         assert(link);
1260
1261         r = sd_netlink_message_get_errno(m);
1262         if (r < 0 && r != -EEXIST)
1263                 log_link_debug_errno(link, r, "Received error adding DHCPv6 Prefix Delegation route: %m");
1264
1265         return 0;
1266 }
1267
1268 int manager_dhcp6_prefix_add(Manager *m, struct in6_addr *addr, Link *link) {
1269         _cleanup_free_ struct in6_addr *a = NULL;
1270         _cleanup_free_ char *buf = NULL;
1271         Link *assigned_link;
1272         Route *route;
1273         int r;
1274
1275         assert_return(m, -EINVAL);
1276         assert_return(addr, -EINVAL);
1277
1278         r = route_add(link, AF_INET6, (union in_addr_union *) addr, 64,
1279                       0, 0, 0, &route);
1280         if (r < 0)
1281                 return r;
1282
1283         r = route_configure(route, link, dhcp6_route_add_handler);
1284         if (r < 0)
1285                 return r;
1286
1287         (void) in_addr_to_string(AF_INET6, (union in_addr_union *) addr, &buf);
1288         log_link_debug(link, "Adding prefix route %s/64", strnull(buf));
1289
1290         assigned_link = hashmap_get(m->dhcp6_prefixes, addr);
1291         if (assigned_link) {
1292                 assert(assigned_link == link);
1293                 return 0;
1294         }
1295
1296         a = newdup(struct in6_addr, addr, 1);
1297         if (!a)
1298                 return -ENOMEM;
1299
1300         r = hashmap_ensure_allocated(&m->dhcp6_prefixes, &in6_addr_hash_ops);
1301         if (r < 0)
1302                 return r;
1303
1304         r = hashmap_put(m->dhcp6_prefixes, a, link);
1305         if (r < 0)
1306                 return r;
1307
1308         TAKE_PTR(a);
1309         link_ref(link);
1310         return 0;
1311 }
1312
1313 static int dhcp6_route_remove_handler(sd_netlink *nl, sd_netlink_message *m, Link *link) {
1314         int r;
1315
1316         assert(link);
1317
1318         r = sd_netlink_message_get_errno(m);
1319         if (r < 0)
1320                 log_link_debug_errno(link, r, "Received error on DHCPv6 Prefix Delegation route removal: %m");
1321
1322         return 1;
1323 }
1324
1325 static int manager_dhcp6_prefix_remove(Manager *m, struct in6_addr *addr) {
1326         _cleanup_free_ struct in6_addr *a = NULL;
1327         _cleanup_(link_unrefp) Link *l = NULL;
1328         _cleanup_free_ char *buf = NULL;
1329         Route *route;
1330         int r;
1331
1332         assert_return(m, -EINVAL);
1333         assert_return(addr, -EINVAL);
1334
1335         l = hashmap_remove2(m->dhcp6_prefixes, addr, (void **) &a);
1336         if (!l)
1337                 return -EINVAL;
1338
1339         (void) sd_radv_remove_prefix(l->radv, addr, 64);
1340         r = route_get(l, AF_INET6, (union in_addr_union *) addr, 64, 0, 0, 0, &route);
1341         if (r < 0)
1342                 return r;
1343
1344         r = route_remove(route, l, dhcp6_route_remove_handler);
1345         if (r < 0)
1346                 return r;
1347
1348         (void) in_addr_to_string(AF_INET6, (union in_addr_union *) addr, &buf);
1349         log_link_debug(l, "Removing prefix route %s/64", strnull(buf));
1350
1351         return 0;
1352 }
1353
1354 int manager_dhcp6_prefix_remove_all(Manager *m, Link *link) {
1355         struct in6_addr *addr;
1356         Iterator i;
1357         Link *l;
1358
1359         assert_return(m, -EINVAL);
1360         assert_return(link, -EINVAL);
1361
1362         HASHMAP_FOREACH_KEY(l, addr, m->dhcp6_prefixes, i)
1363                 if (l == link)
1364                         (void) manager_dhcp6_prefix_remove(m, addr);
1365
1366         return 0;
1367 }
1368
1369 int manager_new(Manager **ret) {
1370         _cleanup_(manager_freep) Manager *m = NULL;
1371         int r;
1372
1373         m = new(Manager, 1);
1374         if (!m)
1375                 return -ENOMEM;
1376
1377         *m = (Manager) {
1378                 .speed_meter_interval_usec = SPEED_METER_DEFAULT_TIME_INTERVAL,
1379         };
1380
1381         m->state_file = strdup("/run/systemd/netif/state");
1382         if (!m->state_file)
1383                 return -ENOMEM;
1384
1385         r = sd_event_default(&m->event);
1386         if (r < 0)
1387                 return r;
1388
1389         (void) sd_event_set_watchdog(m->event, true);
1390         (void) sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL);
1391         (void) sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);
1392
1393         r = sd_event_add_post(m->event, NULL, manager_dirty_handler, m);
1394         if (r < 0)
1395                 return r;
1396
1397         r = manager_connect_rtnl(m);
1398         if (r < 0)
1399                 return r;
1400
1401         r = manager_connect_genl(m);
1402         if (r < 0)
1403                 return r;
1404
1405         r = manager_connect_udev(m);
1406         if (r < 0)
1407                 return r;
1408
1409         r = sd_resolve_default(&m->resolve);
1410         if (r < 0)
1411                 return r;
1412
1413         r = sd_resolve_attach_event(m->resolve, m->event, 0);
1414         if (r < 0)
1415                 return r;
1416
1417         r = setup_default_address_pool(m);
1418         if (r < 0)
1419                 return r;
1420
1421         m->duid.type = DUID_TYPE_EN;
1422
1423         (void) routing_policy_load_rules(m->state_file, &m->rules_saved);
1424
1425         *ret = TAKE_PTR(m);
1426
1427         return 0;
1428 }
1429
1430 void manager_free(Manager *m) {
1431         struct in6_addr *a;
1432         AddressPool *pool;
1433         Link *link;
1434
1435         if (!m)
1436                 return;
1437
1438         free(m->state_file);
1439
1440         while ((a = hashmap_first_key(m->dhcp6_prefixes)))
1441                 (void) manager_dhcp6_prefix_remove(m, a);
1442         hashmap_free(m->dhcp6_prefixes);
1443
1444         while ((link = hashmap_steal_first(m->links))) {
1445                 if (link->dhcp6_client)
1446                         (void) dhcp6_lease_pd_prefix_lost(link->dhcp6_client, link);
1447
1448                 (void) link_stop_clients(link, true);
1449
1450                 link_unref(link);
1451         }
1452
1453         m->dirty_links = set_free_with_destructor(m->dirty_links, link_unref);
1454         m->links_requesting_uuid = set_free_with_destructor(m->links_requesting_uuid, link_unref);
1455         m->links = hashmap_free_with_destructor(m->links, link_unref);
1456
1457         m->duids_requesting_uuid = set_free(m->duids_requesting_uuid);
1458         m->networks = ordered_hashmap_free_with_destructor(m->networks, network_unref);
1459
1460         m->netdevs = hashmap_free_with_destructor(m->netdevs, netdev_unref);
1461
1462         while ((pool = m->address_pools))
1463                 address_pool_free(pool);
1464
1465         /* routing_policy_rule_free() access m->rules and m->rules_foreign.
1466          * So, it is necessary to set NULL after the sets are freed. */
1467         m->rules = set_free_with_destructor(m->rules, routing_policy_rule_free);
1468         m->rules_foreign = set_free_with_destructor(m->rules_foreign, routing_policy_rule_free);
1469         set_free_with_destructor(m->rules_saved, routing_policy_rule_free);
1470
1471         sd_netlink_unref(m->rtnl);
1472         sd_netlink_unref(m->genl);
1473         sd_resolve_unref(m->resolve);
1474
1475         sd_event_source_unref(m->speed_meter_event_source);
1476         sd_event_unref(m->event);
1477
1478         sd_device_monitor_unref(m->device_monitor);
1479
1480         sd_bus_flush_close_unref(m->bus);
1481
1482         free(m->dynamic_timezone);
1483         free(m->dynamic_hostname);
1484
1485         free(m);
1486 }
1487
1488 int manager_start(Manager *m) {
1489         Link *link;
1490         Iterator i;
1491         int r;
1492
1493         assert(m);
1494
1495         r = manager_start_speed_meter(m);
1496         if (r < 0)
1497                 return log_error_errno(r, "Failed to initialize speed meter: %m");
1498
1499         /* The dirty handler will deal with future serialization, but the first one
1500            must be done explicitly. */
1501
1502         manager_save(m);
1503
1504         HASHMAP_FOREACH(link, m->links, i)
1505                 link_save(link);
1506
1507         return 0;
1508 }
1509
1510 int manager_load_config(Manager *m) {
1511         int r;
1512
1513         /* update timestamp */
1514         paths_check_timestamp(NETWORK_DIRS, &m->network_dirs_ts_usec, true);
1515
1516         r = netdev_load(m);
1517         if (r < 0)
1518                 return r;
1519
1520         r = network_load(m);
1521         if (r < 0)
1522                 return r;
1523
1524         return 0;
1525 }
1526
1527 bool manager_should_reload(Manager *m) {
1528         return paths_check_timestamp(NETWORK_DIRS, &m->network_dirs_ts_usec, false);
1529 }
1530
1531 int manager_rtnl_enumerate_links(Manager *m) {
1532         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1533         sd_netlink_message *link;
1534         int r;
1535
1536         assert(m);
1537         assert(m->rtnl);
1538
1539         r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);
1540         if (r < 0)
1541                 return r;
1542
1543         r = sd_netlink_message_request_dump(req, true);
1544         if (r < 0)
1545                 return r;
1546
1547         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1548         if (r < 0)
1549                 return r;
1550
1551         for (link = reply; link; link = sd_netlink_message_next(link)) {
1552                 int k;
1553
1554                 m->enumerating = true;
1555
1556                 k = manager_rtnl_process_link(m->rtnl, link, m);
1557                 if (k < 0)
1558                         r = k;
1559
1560                 m->enumerating = false;
1561         }
1562
1563         return r;
1564 }
1565
1566 int manager_rtnl_enumerate_addresses(Manager *m) {
1567         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1568         sd_netlink_message *addr;
1569         int r;
1570
1571         assert(m);
1572         assert(m->rtnl);
1573
1574         r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, 0);
1575         if (r < 0)
1576                 return r;
1577
1578         r = sd_netlink_message_request_dump(req, true);
1579         if (r < 0)
1580                 return r;
1581
1582         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1583         if (r < 0)
1584                 return r;
1585
1586         for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
1587                 int k;
1588
1589                 m->enumerating = true;
1590
1591                 k = manager_rtnl_process_address(m->rtnl, addr, m);
1592                 if (k < 0)
1593                         r = k;
1594
1595                 m->enumerating = false;
1596         }
1597
1598         return r;
1599 }
1600
1601 int manager_rtnl_enumerate_routes(Manager *m) {
1602         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1603         sd_netlink_message *route;
1604         int r;
1605
1606         assert(m);
1607         assert(m->rtnl);
1608
1609         r = sd_rtnl_message_new_route(m->rtnl, &req, RTM_GETROUTE, 0, 0);
1610         if (r < 0)
1611                 return r;
1612
1613         r = sd_netlink_message_request_dump(req, true);
1614         if (r < 0)
1615                 return r;
1616
1617         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1618         if (r < 0)
1619                 return r;
1620
1621         for (route = reply; route; route = sd_netlink_message_next(route)) {
1622                 int k;
1623
1624                 m->enumerating = true;
1625
1626                 k = manager_rtnl_process_route(m->rtnl, route, m);
1627                 if (k < 0)
1628                         r = k;
1629
1630                 m->enumerating = false;
1631         }
1632
1633         return r;
1634 }
1635
1636 int manager_rtnl_enumerate_rules(Manager *m) {
1637         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1638         sd_netlink_message *rule;
1639         int r;
1640
1641         assert(m);
1642         assert(m->rtnl);
1643
1644         r = sd_rtnl_message_new_routing_policy_rule(m->rtnl, &req, RTM_GETRULE, 0);
1645         if (r < 0)
1646                 return r;
1647
1648         r = sd_netlink_message_request_dump(req, true);
1649         if (r < 0)
1650                 return r;
1651
1652         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1653         if (r < 0) {
1654                 if (r == -EOPNOTSUPP) {
1655                         log_debug("FIB Rules are not supported by the kernel. Ignoring.");
1656                         return 0;
1657                 }
1658
1659                 return r;
1660         }
1661
1662         for (rule = reply; rule; rule = sd_netlink_message_next(rule)) {
1663                 int k;
1664
1665                 m->enumerating = true;
1666
1667                 k = manager_rtnl_process_rule(m->rtnl, rule, m);
1668                 if (k < 0)
1669                         r = k;
1670
1671                 m->enumerating = false;
1672         }
1673
1674         return r;
1675 }
1676
1677 int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, union in_addr_union *found) {
1678         AddressPool *p;
1679         int r;
1680
1681         assert(m);
1682         assert(prefixlen > 0);
1683         assert(found);
1684
1685         LIST_FOREACH(address_pools, p, m->address_pools) {
1686                 if (p->family != family)
1687                         continue;
1688
1689                 r = address_pool_acquire(p, prefixlen, found);
1690                 if (r != 0)
1691                         return r;
1692         }
1693
1694         return 0;
1695 }
1696
1697 Link* manager_find_uplink(Manager *m, Link *exclude) {
1698         _cleanup_free_ struct local_address *gateways = NULL;
1699         int n, i;
1700
1701         assert(m);
1702
1703         /* Looks for a suitable "uplink", via black magic: an
1704          * interface that is up and where the default route with the
1705          * highest priority points to. */
1706
1707         n = local_gateways(m->rtnl, 0, AF_UNSPEC, &gateways);
1708         if (n < 0) {
1709                 log_warning_errno(n, "Failed to determine list of default gateways: %m");
1710                 return NULL;
1711         }
1712
1713         for (i = 0; i < n; i++) {
1714                 Link *link;
1715
1716                 link = hashmap_get(m->links, INT_TO_PTR(gateways[i].ifindex));
1717                 if (!link) {
1718                         log_debug("Weird, found a gateway for a link we don't know. Ignoring.");
1719                         continue;
1720                 }
1721
1722                 if (link == exclude)
1723                         continue;
1724
1725                 if (link->operstate < LINK_OPERSTATE_ROUTABLE)
1726                         continue;
1727
1728                 return link;
1729         }
1730
1731         return NULL;
1732 }
1733
1734 void manager_dirty(Manager *manager) {
1735         assert(manager);
1736
1737         /* the serialized state in /run is no longer up-to-date */
1738         manager->dirty = true;
1739 }
1740
1741 static int set_hostname_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
1742         Manager *manager = userdata;
1743         const sd_bus_error *e;
1744
1745         assert(m);
1746         assert(manager);
1747
1748         e = sd_bus_message_get_error(m);
1749         if (e)
1750                 log_warning_errno(sd_bus_error_get_errno(e), "Could not set hostname: %s", e->message);
1751
1752         return 1;
1753 }
1754
1755 int manager_set_hostname(Manager *m, const char *hostname) {
1756         int r;
1757
1758         log_debug("Setting transient hostname: '%s'", strna(hostname));
1759
1760         if (free_and_strdup(&m->dynamic_hostname, hostname) < 0)
1761                 return log_oom();
1762
1763         if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
1764                 log_debug("Not connected to system bus, setting hostname later.");
1765                 return 0;
1766         }
1767
1768         r = sd_bus_call_method_async(
1769                         m->bus,
1770                         NULL,
1771                         "org.freedesktop.hostname1",
1772                         "/org/freedesktop/hostname1",
1773                         "org.freedesktop.hostname1",
1774                         "SetHostname",
1775                         set_hostname_handler,
1776                         m,
1777                         "sb",
1778                         hostname,
1779                         false);
1780
1781         if (r < 0)
1782                 return log_error_errno(r, "Could not set transient hostname: %m");
1783
1784         return 0;
1785 }
1786
1787 static int set_timezone_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
1788         Manager *manager = userdata;
1789         const sd_bus_error *e;
1790
1791         assert(m);
1792         assert(manager);
1793
1794         e = sd_bus_message_get_error(m);
1795         if (e)
1796                 log_warning_errno(sd_bus_error_get_errno(e), "Could not set timezone: %s", e->message);
1797
1798         return 1;
1799 }
1800
1801 int manager_set_timezone(Manager *m, const char *tz) {
1802         int r;
1803
1804         assert(m);
1805         assert(tz);
1806
1807         log_debug("Setting system timezone: '%s'", tz);
1808         if (free_and_strdup(&m->dynamic_timezone, tz) < 0)
1809                 return log_oom();
1810
1811         if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
1812                 log_debug("Not connected to system bus, setting timezone later.");
1813                 return 0;
1814         }
1815
1816         r = sd_bus_call_method_async(
1817                         m->bus,
1818                         NULL,
1819                         "org.freedesktop.timedate1",
1820                         "/org/freedesktop/timedate1",
1821                         "org.freedesktop.timedate1",
1822                         "SetTimezone",
1823                         set_timezone_handler,
1824                         m,
1825                         "sb",
1826                         tz,
1827                         false);
1828         if (r < 0)
1829                 return log_error_errno(r, "Could not set timezone: %m");
1830
1831         return 0;
1832 }
1833
1834 int manager_request_product_uuid(Manager *m, Link *link) {
1835         int r;
1836
1837         assert(m);
1838
1839         if (m->has_product_uuid)
1840                 return 0;
1841
1842         log_debug("Requesting product UUID");
1843
1844         if (link) {
1845                 DUID *duid;
1846
1847                 assert_se(duid = link_get_duid(link));
1848
1849                 r = set_ensure_allocated(&m->links_requesting_uuid, NULL);
1850                 if (r < 0)
1851                         return log_oom();
1852
1853                 r = set_ensure_allocated(&m->duids_requesting_uuid, NULL);
1854                 if (r < 0)
1855                         return log_oom();
1856
1857                 r = set_put(m->links_requesting_uuid, link);
1858                 if (r < 0)
1859                         return log_oom();
1860
1861                 r = set_put(m->duids_requesting_uuid, duid);
1862                 if (r < 0)
1863                         return log_oom();
1864         }
1865
1866         if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
1867                 log_debug("Not connected to system bus, requesting product UUID later.");
1868                 return 0;
1869         }
1870
1871         r = sd_bus_call_method_async(
1872                         m->bus,
1873                         NULL,
1874                         "org.freedesktop.hostname1",
1875                         "/org/freedesktop/hostname1",
1876                         "org.freedesktop.hostname1",
1877                         "GetProductUUID",
1878                         get_product_uuid_handler,
1879                         m,
1880                         "b",
1881                         false);
1882         if (r < 0)
1883                 return log_warning_errno(r, "Failed to get product UUID: %m");
1884
1885         return 0;
1886 }