src/network/networkd-manager.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <sys/socket.h>
   4 #include <linux/if.h>
   5 #include <linux/fib_rules.h>
   6 #include <stdio_ext.h>
   7
   8 #include "sd-daemon.h"
   9 #include "sd-netlink.h"
  10
  11 #include "alloc-util.h"
  12 #include "bus-util.h"
  13 #include "conf-parser.h"
  14 #include "def.h"
  15 #include "device-util.h"
  16 #include "dns-domain.h"
  17 #include "fd-util.h"
  18 #include "fileio.h"
  19 #include "local-addresses.h"
  20 #include "netlink-util.h"
  21 #include "networkd-manager.h"
  22 #include "ordered-set.h"
  23 #include "path-util.h"
  24 #include "set.h"
  25 #include "strv.h"
  26 #include "tmpfile-util.h"
  27 #include "virt.h"
  28
  29 /* use 8 MB for receive socket kernel queue. */
  30 #define RCVBUF_SIZE    (8*1024*1024)
  31
  32 const char* const network_dirs[] = {
  33         "/etc/systemd/network",
  34         "/run/systemd/network",
  35         "/usr/lib/systemd/network",
  36 #if HAVE_SPLIT_USR
  37         "/lib/systemd/network",
  38 #endif
  39         NULL};
  40
  41 static int setup_default_address_pool(Manager *m) {
  42         AddressPool *p;
  43         int r;
  44
  45         assert(m);
  46
  47         /* Add in the well-known private address ranges. */
  48
  49         r = address_pool_new_from_string(m, &p, AF_INET6, "fc00::", 7);
  50         if (r < 0)
  51                 return r;
  52
  53         r = address_pool_new_from_string(m, &p, AF_INET, "192.168.0.0", 16);
  54         if (r < 0)
  55                 return r;
  56
  57         r = address_pool_new_from_string(m, &p, AF_INET, "172.16.0.0", 12);
  58         if (r < 0)
  59                 return r;
  60
  61         r = address_pool_new_from_string(m, &p, AF_INET, "10.0.0.0", 8);
  62         if (r < 0)
  63                 return r;
  64
  65         return 0;
  66 }
  67
  68 static int manager_reset_all(Manager *m) {
  69         Link *link;
  70         Iterator i;
  71         int r;
  72
  73         assert(m);
  74
  75         HASHMAP_FOREACH(link, m->links, i) {
  76                 r = link_carrier_reset(link);
  77                 if (r < 0)
  78                         log_link_warning_errno(link, r, "Could not reset carrier: %m");
  79         }
  80
  81         return 0;
  82 }
  83
  84 static int match_prepare_for_sleep(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
  85         Manager *m = userdata;
  86         int b, r;
  87
  88         assert(message);
  89         assert(m);
  90
  91         r = sd_bus_message_read(message, "b", &b);
  92         if (r < 0) {
  93                 log_debug_errno(r, "Failed to parse PrepareForSleep signal: %m");
  94                 return 0;
  95         }
  96
  97         if (b)
  98                 return 0;
  99
 100         log_debug("Coming back from suspend, resetting all connections...");
 101
 102         (void) manager_reset_all(m);
 103
 104         return 0;
 105 }
 106
 107 static int on_connected(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
 108         Manager *m = userdata;
 109
 110         assert(message);
 111         assert(m);
 112
 113         /* Did we get a timezone or transient hostname from DHCP while D-Bus wasn't up yet? */
 114         if (m->dynamic_hostname)
 115                 (void) manager_set_hostname(m, m->dynamic_hostname);
 116         if (m->dynamic_timezone)
 117                 (void) manager_set_timezone(m, m->dynamic_timezone);
 118         if (m->links_requesting_uuid)
 119                 (void) manager_request_product_uuid(m, NULL);
 120
 121         return 0;
 122 }
 123
 124 int manager_connect_bus(Manager *m) {
 125         int r;
 126
 127         assert(m);
 128
 129         if (m->bus)
 130                 return 0;
 131
 132         r = bus_open_system_watch_bind_with_description(&m->bus, "bus-api-network");
 133         if (r < 0)
 134                 return log_error_errno(r, "Failed to connect to bus: %m");
 135
 136         r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/network1", "org.freedesktop.network1.Manager", manager_vtable, m);
 137         if (r < 0)
 138                 return log_error_errno(r, "Failed to add manager object vtable: %m");
 139
 140         r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/link", "org.freedesktop.network1.Link", link_vtable, link_object_find, m);
 141         if (r < 0)
 142                return log_error_errno(r, "Failed to add link object vtable: %m");
 143
 144         r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/link", link_node_enumerator, m);
 145         if (r < 0)
 146                 return log_error_errno(r, "Failed to add link enumerator: %m");
 147
 148         r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/network", "org.freedesktop.network1.Network", network_vtable, network_object_find, m);
 149         if (r < 0)
 150                return log_error_errno(r, "Failed to add network object vtable: %m");
 151
 152         r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/network", network_node_enumerator, m);
 153         if (r < 0)
 154                 return log_error_errno(r, "Failed to add network enumerator: %m");
 155
 156         r = sd_bus_request_name_async(m->bus, NULL, "org.freedesktop.network1", 0, NULL, NULL);
 157         if (r < 0)
 158                 return log_error_errno(r, "Failed to request name: %m");
 159
 160         r = sd_bus_attach_event(m->bus, m->event, 0);
 161         if (r < 0)
 162                 return log_error_errno(r, "Failed to attach bus to event loop: %m");
 163
 164         r = sd_bus_match_signal_async(
 165                         m->bus,
 166                         NULL,
 167                         "org.freedesktop.DBus.Local",
 168                         NULL,
 169                         "org.freedesktop.DBus.Local",
 170                         "Connected",
 171                         on_connected, NULL, m);
 172         if (r < 0)
 173                 return log_error_errno(r, "Failed to request match on Connected signal: %m");
 174
 175         r = sd_bus_match_signal_async(
 176                         m->bus,
 177                         NULL,
 178                         "org.freedesktop.login1",
 179                         "/org/freedesktop/login1",
 180                         "org.freedesktop.login1.Manager",
 181                         "PrepareForSleep",
 182                         match_prepare_for_sleep, NULL, m);
 183         if (r < 0)
 184                 log_warning_errno(r, "Failed to request match for PrepareForSleep, ignoring: %m");
 185
 186         return 0;
 187 }
 188
 189 static int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) {
 190         Manager *m = userdata;
 191         const char *action;
 192         Link *link = NULL;
 193         int r, ifindex;
 194
 195         assert(m);
 196         assert(device);
 197
 198         r = sd_device_get_property_value(device, "ACTION", &action);
 199         if (r < 0) {
 200                 log_device_debug_errno(device, r, "Failed to get 'ACTION' property, ignoring device: %m");
 201                 return 0;
 202         }
 203
 204         if (!STR_IN_SET(action, "add", "change")) {
 205                 log_device_debug(device, "Ignoring udev %s event for device.", action);
 206                 return 0;
 207         }
 208
 209         r = sd_device_get_ifindex(device, &ifindex);
 210         if (r < 0) {
 211                 log_device_debug_errno(device, r, "Ignoring udev ADD event for device without ifindex or with invalid ifindex: %m");
 212                 return 0;
 213         }
 214
 215         r = link_get(m, ifindex, &link);
 216         if (r < 0) {
 217                 if (r != -ENODEV)
 218                         log_debug_errno(r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
 219                 return 0;
 220         }
 221
 222         (void) link_initialized(link, device);
 223
 224         return 0;
 225 }
 226
 227 static int manager_connect_udev(Manager *m) {
 228         int r;
 229
 230         /* udev does not initialize devices inside containers,
 231          * so we rely on them being already initialized before
 232          * entering the container */
 233         if (detect_container() > 0)
 234                 return 0;
 235
 236         r = sd_device_monitor_new(&m->device_monitor);
 237         if (r < 0)
 238                 return log_error_errno(r, "Failed to initialize device monitor: %m");
 239
 240         r = sd_device_monitor_filter_add_match_subsystem_devtype(m->device_monitor, "net", NULL);
 241         if (r < 0)
 242                 return log_error_errno(r, "Could not add device monitor filter: %m");
 243
 244         r = sd_device_monitor_attach_event(m->device_monitor, m->event);
 245         if (r < 0)
 246                 return log_error_errno(r, "Failed to attach event to device monitor: %m");
 247
 248         r = sd_device_monitor_start(m->device_monitor, manager_udev_process_link, m);
 249         if (r < 0)
 250                 return log_error_errno(r, "Failed to start device monitor: %m");
 251
 252         return 0;
 253 }
 254
 255 int manager_rtnl_process_route(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 256         Manager *m = userdata;
 257         Link *link = NULL;
 258         uint16_t type;
 259         uint32_t ifindex, priority = 0;
 260         unsigned char protocol, scope, tos, table, rt_type;
 261         int family;
 262         unsigned char dst_prefixlen, src_prefixlen;
 263         union in_addr_union dst = {}, gw = {}, src = {}, prefsrc = {};
 264         Route *route = NULL;
 265         int r;
 266
 267         assert(rtnl);
 268         assert(message);
 269         assert(m);
 270
 271         if (sd_netlink_message_is_error(message)) {
 272                 r = sd_netlink_message_get_errno(message);
 273                 if (r < 0)
 274                         log_warning_errno(r, "rtnl: failed to receive route, ignoring: %m");
 275
 276                 return 0;
 277         }
 278
 279         r = sd_netlink_message_get_type(message, &type);
 280         if (r < 0) {
 281                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
 282                 return 0;
 283         } else if (!IN_SET(type, RTM_NEWROUTE, RTM_DELROUTE)) {
 284                 log_warning("rtnl: received unexpected message type when processing route, ignoring");
 285                 return 0;
 286         }
 287
 288         r = sd_netlink_message_read_u32(message, RTA_OIF, &ifindex);
 289         if (r == -ENODATA) {
 290                 log_debug("rtnl: received route without ifindex, ignoring");
 291                 return 0;
 292         } else if (r < 0) {
 293                 log_warning_errno(r, "rtnl: could not get ifindex from route, ignoring: %m");
 294                 return 0;
 295         } else if (ifindex <= 0) {
 296                 log_warning("rtnl: received route message with invalid ifindex, ignoring: %d", ifindex);
 297                 return 0;
 298         } else {
 299                 r = link_get(m, ifindex, &link);
 300                 if (r < 0 || !link) {
 301                         /* when enumerating we might be out of sync, but we will
 302                          * get the route again, so just ignore it */
 303                         if (!m->enumerating)
 304                                 log_warning("rtnl: received route for nonexistent link (%d), ignoring", ifindex);
 305                         return 0;
 306                 }
 307         }
 308
 309         r = sd_rtnl_message_route_get_family(message, &family);
 310         if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) {
 311                 log_link_warning(link, "rtnl: received address with invalid family, ignoring");
 312                 return 0;
 313         }
 314
 315         r = sd_rtnl_message_route_get_protocol(message, &protocol);
 316         if (r < 0) {
 317                 log_warning_errno(r, "rtnl: could not get route protocol: %m");
 318                 return 0;
 319         }
 320
 321         switch (family) {
 322         case AF_INET:
 323                 r = sd_netlink_message_read_in_addr(message, RTA_DST, &dst.in);
 324                 if (r < 0 && r != -ENODATA) {
 325                         log_link_warning_errno(link, r, "rtnl: received route without valid destination, ignoring: %m");
 326                         return 0;
 327                 }
 328
 329                 r = sd_netlink_message_read_in_addr(message, RTA_GATEWAY, &gw.in);
 330                 if (r < 0 && r != -ENODATA) {
 331                         log_link_warning_errno(link, r, "rtnl: received route with invalid gateway, ignoring: %m");
 332                         return 0;
 333                 }
 334
 335                 r = sd_netlink_message_read_in_addr(message, RTA_SRC, &src.in);
 336                 if (r < 0 && r != -ENODATA) {
 337                         log_link_warning_errno(link, r, "rtnl: received route with invalid source, ignoring: %m");
 338                         return 0;
 339                 }
 340
 341                 r = sd_netlink_message_read_in_addr(message, RTA_PREFSRC, &prefsrc.in);
 342                 if (r < 0 && r != -ENODATA) {
 343                         log_link_warning_errno(link, r, "rtnl: received route with invalid preferred source, ignoring: %m");
 344                         return 0;
 345                 }
 346
 347                 break;
 348
 349         case AF_INET6:
 350                 r = sd_netlink_message_read_in6_addr(message, RTA_DST, &dst.in6);
 351                 if (r < 0 && r != -ENODATA) {
 352                         log_link_warning_errno(link, r, "rtnl: received route without valid destination, ignoring: %m");
 353                         return 0;
 354                 }
 355
 356                 r = sd_netlink_message_read_in6_addr(message, RTA_GATEWAY, &gw.in6);
 357                 if (r < 0 && r != -ENODATA) {
 358                         log_link_warning_errno(link, r, "rtnl: received route with invalid gateway, ignoring: %m");
 359                         return 0;
 360                 }
 361
 362                 r = sd_netlink_message_read_in6_addr(message, RTA_SRC, &src.in6);
 363                 if (r < 0 && r != -ENODATA) {
 364                         log_link_warning_errno(link, r, "rtnl: received route with invalid source, ignoring: %m");
 365                         return 0;
 366                 }
 367
 368                 r = sd_netlink_message_read_in6_addr(message, RTA_PREFSRC, &prefsrc.in6);
 369                 if (r < 0 && r != -ENODATA) {
 370                         log_link_warning_errno(link, r, "rtnl: received route with invalid preferred source, ignoring: %m");
 371                         return 0;
 372                 }
 373
 374                 break;
 375
 376         default:
 377                 assert_not_reached("Received unsupported address family");
 378                 return 0;
 379         }
 380
 381         r = sd_rtnl_message_route_get_dst_prefixlen(message, &dst_prefixlen);
 382         if (r < 0) {
 383                 log_link_warning_errno(link, r, "rtnl: received route with invalid destination prefixlen, ignoring: %m");
 384                 return 0;
 385         }
 386
 387         r = sd_rtnl_message_route_get_src_prefixlen(message, &src_prefixlen);
 388         if (r < 0) {
 389                 log_link_warning_errno(link, r, "rtnl: received route with invalid source prefixlen, ignoring: %m");
 390                 return 0;
 391         }
 392
 393         r = sd_rtnl_message_route_get_scope(message, &scope);
 394         if (r < 0) {
 395                 log_link_warning_errno(link, r, "rtnl: received route with invalid scope, ignoring: %m");
 396                 return 0;
 397         }
 398
 399         r = sd_rtnl_message_route_get_tos(message, &tos);
 400         if (r < 0) {
 401                 log_link_warning_errno(link, r, "rtnl: received route with invalid tos, ignoring: %m");
 402                 return 0;
 403         }
 404
 405         r = sd_rtnl_message_route_get_type(message, &rt_type);
 406         if (r < 0) {
 407                 log_link_warning_errno(link, r, "rtnl: received route with invalid type, ignoring: %m");
 408                 return 0;
 409         }
 410
 411         r = sd_rtnl_message_route_get_table(message, &table);
 412         if (r < 0) {
 413                 log_link_warning_errno(link, r, "rtnl: received route with invalid table, ignoring: %m");
 414                 return 0;
 415         }
 416
 417         r = sd_netlink_message_read_u32(message, RTA_PRIORITY, &priority);
 418         if (r < 0 && r != -ENODATA) {
 419                 log_link_warning_errno(link, r, "rtnl: received route with invalid priority, ignoring: %m");
 420                 return 0;
 421         }
 422
 423         (void) route_get(link, family, &dst, dst_prefixlen, tos, priority, table, &route);
 424
 425         if (DEBUG_LOGGING) {
 426                 _cleanup_free_ char *buf_dst = NULL, *buf_dst_prefixlen = NULL,
 427                         *buf_src = NULL, *buf_gw = NULL, *buf_prefsrc = NULL;
 428
 429                 if (!in_addr_is_null(family, &dst)) {
 430                         (void) in_addr_to_string(family, &dst, &buf_dst);
 431                         (void) asprintf(&buf_dst_prefixlen, "/%u", dst_prefixlen);
 432                 }
 433                 if (!in_addr_is_null(family, &src))
 434                         (void) in_addr_to_string(family, &src, &buf_src);
 435                 if (!in_addr_is_null(family, &gw))
 436                         (void) in_addr_to_string(family, &gw, &buf_gw);
 437                 if (!in_addr_is_null(family, &prefsrc))
 438                         (void) in_addr_to_string(family, &prefsrc, &buf_prefsrc);
 439
 440                 log_link_debug(link,
 441                                "%s route: dst: %s%s, src: %s, gw: %s, prefsrc: %s",
 442                                type == RTM_DELROUTE ? "Removing" : route ? "Updating" : "Adding",
 443                                strna(buf_dst), strempty(buf_dst_prefixlen),
 444                                strna(buf_src), strna(buf_gw), strna(buf_prefsrc));
 445         }
 446
 447         switch (type) {
 448         case RTM_NEWROUTE:
 449                 if (!route) {
 450                         /* A route appeared that we did not request */
 451                         r = route_add_foreign(link, family, &dst, dst_prefixlen, tos, priority, table, &route);
 452                         if (r < 0) {
 453                                 log_link_warning_errno(link, r, "Failed to add route, ignoring: %m");
 454                                 return 0;
 455                         }
 456                 }
 457
 458                 route_update(route, &src, src_prefixlen, &gw, &prefsrc, scope, protocol, rt_type);
 459
 460                 break;
 461
 462         case RTM_DELROUTE:
 463                 route_free(route);
 464                 break;
 465
 466         default:
 467                 assert_not_reached("Received invalid RTNL message type");
 468         }
 469
 470         return 1;
 471 }
 472
 473 int manager_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 474         Manager *m = userdata;
 475         Link *link = NULL;
 476         uint16_t type;
 477         unsigned char flags;
 478         int family;
 479         unsigned char prefixlen;
 480         unsigned char scope;
 481         union in_addr_union in_addr;
 482         struct ifa_cacheinfo cinfo;
 483         Address *address = NULL;
 484         char buf[INET6_ADDRSTRLEN], valid_buf[FORMAT_TIMESPAN_MAX];
 485         const char *valid_str = NULL;
 486         int r, ifindex;
 487
 488         assert(rtnl);
 489         assert(message);
 490         assert(m);
 491
 492         if (sd_netlink_message_is_error(message)) {
 493                 r = sd_netlink_message_get_errno(message);
 494                 if (r < 0)
 495                         log_warning_errno(r, "rtnl: failed to receive address, ignoring: %m");
 496
 497                 return 0;
 498         }
 499
 500         r = sd_netlink_message_get_type(message, &type);
 501         if (r < 0) {
 502                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
 503                 return 0;
 504         } else if (!IN_SET(type, RTM_NEWADDR, RTM_DELADDR)) {
 505                 log_warning("rtnl: received unexpected message type when processing address, ignoring");
 506                 return 0;
 507         }
 508
 509         r = sd_rtnl_message_addr_get_ifindex(message, &ifindex);
 510         if (r < 0) {
 511                 log_warning_errno(r, "rtnl: could not get ifindex from address, ignoring: %m");
 512                 return 0;
 513         } else if (ifindex <= 0) {
 514                 log_warning("rtnl: received address message with invalid ifindex, ignoring: %d", ifindex);
 515                 return 0;
 516         } else {
 517                 r = link_get(m, ifindex, &link);
 518                 if (r < 0 || !link) {
 519                         /* when enumerating we might be out of sync, but we will
 520                          * get the address again, so just ignore it */
 521                         if (!m->enumerating)
 522                                 log_warning("rtnl: received address for nonexistent link (%d), ignoring", ifindex);
 523                         return 0;
 524                 }
 525         }
 526
 527         r = sd_rtnl_message_addr_get_family(message, &family);
 528         if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) {
 529                 log_link_warning(link, "rtnl: received address with invalid family, ignoring");
 530                 return 0;
 531         }
 532
 533         r = sd_rtnl_message_addr_get_prefixlen(message, &prefixlen);
 534         if (r < 0) {
 535                 log_link_warning_errno(link, r, "rtnl: received address with invalid prefixlen, ignoring: %m");
 536                 return 0;
 537         }
 538
 539         r = sd_rtnl_message_addr_get_scope(message, &scope);
 540         if (r < 0) {
 541                 log_link_warning_errno(link, r, "rtnl: received address with invalid scope, ignoring: %m");
 542                 return 0;
 543         }
 544
 545         r = sd_rtnl_message_addr_get_flags(message, &flags);
 546         if (r < 0) {
 547                 log_link_warning_errno(link, r, "rtnl: received address with invalid flags, ignoring: %m");
 548                 return 0;
 549         }
 550
 551         switch (family) {
 552         case AF_INET:
 553                 r = sd_netlink_message_read_in_addr(message, IFA_LOCAL, &in_addr.in);
 554                 if (r < 0) {
 555                         log_link_warning_errno(link, r, "rtnl: received address without valid address, ignoring: %m");
 556                         return 0;
 557                 }
 558
 559                 break;
 560
 561         case AF_INET6:
 562                 r = sd_netlink_message_read_in6_addr(message, IFA_ADDRESS, &in_addr.in6);
 563                 if (r < 0) {
 564                         log_link_warning_errno(link, r, "rtnl: received address without valid address, ignoring: %m");
 565                         return 0;
 566                 }
 567
 568                 break;
 569
 570         default:
 571                 assert_not_reached("Received unsupported address family");
 572         }
 573
 574         if (!inet_ntop(family, &in_addr, buf, INET6_ADDRSTRLEN)) {
 575                 log_link_warning(link, "Could not print address, ignoring");
 576                 return 0;
 577         }
 578
 579         r = sd_netlink_message_read_cache_info(message, IFA_CACHEINFO, &cinfo);
 580         if (r < 0 && r != -ENODATA) {
 581                 log_link_warning_errno(link, r, "rtnl: cannot get IFA_CACHEINFO attribute, ignoring: %m");
 582                 return 0;
 583         } else if (r >= 0) {
 584                 if (cinfo.ifa_valid != CACHE_INFO_INFINITY_LIFE_TIME)
 585                         valid_str = format_timespan(valid_buf, FORMAT_TIMESPAN_MAX,
 586                                                     cinfo.ifa_valid * USEC_PER_SEC,
 587                                                     USEC_PER_SEC);
 588         }
 589
 590         (void) address_get(link, family, &in_addr, prefixlen, &address);
 591
 592         switch (type) {
 593         case RTM_NEWADDR:
 594                 if (address)
 595                         log_link_debug(link, "Updating address: %s/%u (valid %s%s)", buf, prefixlen,
 596                                        valid_str ? "for " : "forever", strempty(valid_str));
 597                 else {
 598                         /* An address appeared that we did not request */
 599                         r = address_add_foreign(link, family, &in_addr, prefixlen, &address);
 600                         if (r < 0) {
 601                                 log_link_warning_errno(link, r, "Failed to add address %s/%u, ignoring: %m", buf, prefixlen);
 602                                 return 0;
 603                         } else
 604                                 log_link_debug(link, "Adding address: %s/%u (valid %s%s)", buf, prefixlen,
 605                                                valid_str ? "for " : "forever", strempty(valid_str));
 606                 }
 607
 608                 r = address_update(address, flags, scope, &cinfo);
 609                 if (r < 0) {
 610                         log_link_warning_errno(link, r, "Failed to update address %s/%u, ignoring: %m", buf, prefixlen);
 611                         return 0;
 612                 }
 613
 614                 break;
 615
 616         case RTM_DELADDR:
 617
 618                 if (address) {
 619                         log_link_debug(link, "Removing address: %s/%u (valid %s%s)", buf, prefixlen,
 620                                        valid_str ? "for " : "forever", strempty(valid_str));
 621                         (void) address_drop(address);
 622                 } else
 623                         log_link_warning(link, "Removing non-existent address: %s/%u (valid %s%s), ignoring", buf, prefixlen,
 624                                          valid_str ? "for " : "forever", strempty(valid_str));
 625
 626                 break;
 627         default:
 628                 assert_not_reached("Received invalid RTNL message type");
 629         }
 630
 631         return 1;
 632 }
 633
 634 static int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 635         Manager *m = userdata;
 636         Link *link = NULL;
 637         NetDev *netdev = NULL;
 638         uint16_t type;
 639         const char *name;
 640         int r, ifindex;
 641
 642         assert(rtnl);
 643         assert(message);
 644         assert(m);
 645
 646         if (sd_netlink_message_is_error(message)) {
 647                 r = sd_netlink_message_get_errno(message);
 648                 if (r < 0)
 649                         log_warning_errno(r, "rtnl: Could not receive link, ignoring: %m");
 650
 651                 return 0;
 652         }
 653
 654         r = sd_netlink_message_get_type(message, &type);
 655         if (r < 0) {
 656                 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
 657                 return 0;
 658         } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
 659                 log_warning("rtnl: Received unexpected message type when processing link, ignoring");
 660                 return 0;
 661         }
 662
 663         r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
 664         if (r < 0) {
 665                 log_warning_errno(r, "rtnl: Could not get ifindex from link, ignoring: %m");
 666                 return 0;
 667         } else if (ifindex <= 0) {
 668                 log_warning("rtnl: received link message with invalid ifindex %d, ignoring", ifindex);
 669                 return 0;
 670         }
 671
 672         r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
 673         if (r < 0) {
 674                 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
 675                 return 0;
 676         }
 677
 678         (void) link_get(m, ifindex, &link);
 679         (void) netdev_get(m, name, &netdev);
 680
 681         switch (type) {
 682         case RTM_NEWLINK:
 683                 if (!link) {
 684                         /* link is new, so add it */
 685                         r = link_add(m, message, &link);
 686                         if (r < 0) {
 687                                 log_warning_errno(r, "Could not add new link, ignoring: %m");
 688                                 return 0;
 689                         }
 690                 }
 691
 692                 if (netdev) {
 693                         /* netdev exists, so make sure the ifindex matches */
 694                         r = netdev_set_ifindex(netdev, message);
 695                         if (r < 0) {
 696                                 log_warning_errno(r, "Could not set ifindex on netdev, ignoring: %m");
 697                                 return 0;
 698                         }
 699                 }
 700
 701                 r = link_update(link, message);
 702                 if (r < 0) {
 703                         log_warning_errno(r, "Could not update link, ignoring: %m");
 704                         return 0;
 705                 }
 706
 707                 break;
 708
 709         case RTM_DELLINK:
 710                 link_drop(link);
 711                 netdev_drop(netdev);
 712
 713                 break;
 714
 715         default:
 716                 assert_not_reached("Received invalid RTNL message type.");
 717         }
 718
 719         return 1;
 720 }
 721
 722 int manager_rtnl_process_rule(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 723         uint8_t tos = 0, to_prefixlen = 0, from_prefixlen = 0, protocol = 0;
 724         struct fib_rule_port_range sport = {}, dport = {};
 725         union in_addr_union to = {}, from = {};
 726         RoutingPolicyRule *rule = NULL;
 727         uint32_t fwmark = 0, table = 0;
 728         const char *iif = NULL, *oif = NULL;
 729         Manager *m = userdata;
 730         uint16_t type;
 731         int family;
 732         int r;
 733
 734         assert(rtnl);
 735         assert(message);
 736         assert(m);
 737
 738         if (sd_netlink_message_is_error(message)) {
 739                 r = sd_netlink_message_get_errno(message);
 740                 if (r < 0)
 741                         log_warning_errno(r, "rtnl: failed to receive rule, ignoring: %m");
 742
 743                 return 0;
 744         }
 745
 746         r = sd_netlink_message_get_type(message, &type);
 747         if (r < 0) {
 748                 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
 749                 return 0;
 750         } else if (!IN_SET(type, RTM_NEWRULE, RTM_DELRULE)) {
 751                 log_warning("rtnl: received unexpected message type '%u' when processing rule, ignoring", type);
 752                 return 0;
 753         }
 754
 755         r = sd_rtnl_message_get_family(message, &family);
 756         if (r < 0) {
 757                 log_warning_errno(r, "rtnl: could not get rule family, ignoring: %m");
 758                 return 0;
 759         } else if (!IN_SET(family, AF_INET, AF_INET6)) {
 760                 log_debug("rtnl: received address with invalid family %u, ignoring", family);
 761                 return 0;
 762         }
 763
 764         switch (family) {
 765         case AF_INET:
 766                 r = sd_netlink_message_read_in_addr(message, FRA_SRC, &from.in);
 767                 if (r < 0 && r != -ENODATA) {
 768                         log_warning_errno(r, "rtnl: could not get FRA_SRC attribute, ignoring: %m");
 769                         return 0;
 770                 } else if (r >= 0) {
 771                         r = sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(message, &from_prefixlen);
 772                         if (r < 0) {
 773                                 log_warning_errno(r, "rtnl: failed to retrieve rule from prefix length, ignoring: %m");
 774                                 return 0;
 775                         }
 776                 }
 777
 778                 r = sd_netlink_message_read_in_addr(message, FRA_DST, &to.in);
 779                 if (r < 0 && r != -ENODATA) {
 780                         log_warning_errno(r, "rtnl: could not get FRA_DST attribute, ignoring: %m");
 781                         return 0;
 782                 } else if (r >= 0) {
 783                         r = sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(message, &to_prefixlen);
 784                         if (r < 0) {
 785                                 log_warning_errno(r, "rtnl: failed to retrieve rule to prefix length, ignoring: %m");
 786                                 return 0;
 787                         }
 788                 }
 789
 790                 break;
 791
 792         case AF_INET6:
 793                 r = sd_netlink_message_read_in6_addr(message, FRA_SRC, &from.in6);
 794                 if (r < 0 && r != -ENODATA) {
 795                         log_warning_errno(r, "rtnl: could not get FRA_SRC attribute, ignoring: %m");
 796                         return 0;
 797                 } else if (r >= 0) {
 798                         r = sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(message, &from_prefixlen);
 799                         if (r < 0) {
 800                                 log_warning_errno(r, "rtnl: failed to retrieve rule from prefix length, ignoring: %m");
 801                                 return 0;
 802                         }
 803                 }
 804
 805                 r = sd_netlink_message_read_in6_addr(message, FRA_DST, &to.in6);
 806                 if (r < 0 && r != -ENODATA) {
 807                         log_warning_errno(r, "rtnl: could not get FRA_DST attribute, ignoring: %m");
 808                         return 0;
 809                 } else if (r >= 0) {
 810                         r = sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(message, &to_prefixlen);
 811                         if (r < 0) {
 812                                 log_warning_errno(r, "rtnl: failed to retrieve rule to prefix length, ignoring: %m");
 813                                 return 0;
 814                         }
 815                 }
 816
 817                 break;
 818
 819         default:
 820                 assert_not_reached("Received unsupported address family");
 821         }
 822
 823         if (from_prefixlen == 0 && to_prefixlen == 0)
 824                 return 0;
 825
 826         r = sd_netlink_message_read_u32(message, FRA_FWMARK, &fwmark);
 827         if (r < 0 && r != -ENODATA) {
 828                 log_warning_errno(r, "rtnl: could not get FRA_FWMARK attribute, ignoring: %m");
 829                 return 0;
 830         }
 831
 832         r = sd_netlink_message_read_u32(message, FRA_TABLE, &table);
 833         if (r < 0 && r != -ENODATA) {
 834                 log_warning_errno(r, "rtnl: could not get FRA_TABLE attribute, ignoring: %m");
 835                 return 0;
 836         }
 837
 838         r = sd_rtnl_message_routing_policy_rule_get_tos(message, &tos);
 839         if (r < 0 && r != -ENODATA) {
 840                 log_warning_errno(r, "rtnl: could not get ip rule TOS, ignoring: %m");
 841                 return 0;
 842         }
 843
 844         r = sd_netlink_message_read_string(message, FRA_IIFNAME, &iif);
 845         if (r < 0 && r != -ENODATA) {
 846                 log_warning_errno(r, "rtnl: could not get FRA_IIFNAME attribute, ignoring: %m");
 847                 return 0;
 848         }
 849
 850         r = sd_netlink_message_read_string(message, FRA_OIFNAME, &oif);
 851         if (r < 0 && r != -ENODATA) {
 852                 log_warning_errno(r, "rtnl: could not get FRA_OIFNAME attribute, ignoring: %m");
 853                 return 0;
 854         }
 855
 856         r = sd_netlink_message_read_u8(message, FRA_IP_PROTO, &protocol);
 857         if (r < 0 && r != -ENODATA) {
 858                 log_warning_errno(r, "rtnl: could not get FRA_IP_PROTO attribute, ignoring: %m");
 859                 return 0;
 860         }
 861
 862         r = sd_netlink_message_read(message, FRA_SPORT_RANGE, sizeof(sport), (void *) &sport);
 863         if (r < 0 && r != -ENODATA) {
 864                 log_warning_errno(r, "rtnl: could not get FRA_SPORT_RANGE attribute, ignoring: %m");
 865                 return 0;
 866         }
 867
 868         r = sd_netlink_message_read(message, FRA_DPORT_RANGE, sizeof(dport), (void *) &dport);
 869         if (r < 0 && r != -ENODATA) {
 870                 log_warning_errno(r, "rtnl: could not get FRA_DPORT_RANGE attribute, ignoring: %m");
 871                 return 0;
 872         }
 873
 874         (void) routing_policy_rule_get(m, family, &from, from_prefixlen, &to, to_prefixlen, tos, fwmark, table, iif, oif, protocol, &sport, &dport, &rule);
 875
 876         switch (type) {
 877         case RTM_NEWRULE:
 878                 if (!rule) {
 879                         r = routing_policy_rule_add_foreign(m, family, &from, from_prefixlen, &to, to_prefixlen, tos, fwmark, table, iif, oif, protocol, &sport, &dport, &rule);
 880                         if (r < 0) {
 881                                 log_warning_errno(r, "Could not add rule, ignoring: %m");
 882                                 return 0;
 883                         }
 884                 }
 885                 break;
 886         case RTM_DELRULE:
 887                 routing_policy_rule_free(rule);
 888
 889                 break;
 890
 891         default:
 892                 assert_not_reached("Received invalid RTNL message type");
 893         }
 894
 895         return 1;
 896 }
 897
 898 static int systemd_netlink_fd(void) {
 899         int n, fd, rtnl_fd = -EINVAL;
 900
 901         n = sd_listen_fds(true);
 902         if (n <= 0)
 903                 return -EINVAL;
 904
 905         for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++) {
 906                 if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) {
 907                         if (rtnl_fd >= 0)
 908                                 return -EINVAL;
 909
 910                         rtnl_fd = fd;
 911                 }
 912         }
 913
 914         return rtnl_fd;
 915 }
 916
 917 static int manager_connect_genl(Manager *m) {
 918         int r;
 919
 920         assert(m);
 921
 922         r = sd_genl_socket_open(&m->genl);
 923         if (r < 0)
 924                 return r;
 925
 926         r = sd_netlink_inc_rcvbuf(m->genl, RCVBUF_SIZE);
 927         if (r < 0)
 928                 return r;
 929
 930         r = sd_netlink_attach_event(m->genl, m->event, 0);
 931         if (r < 0)
 932                 return r;
 933
 934         return 0;
 935 }
 936
 937 static int manager_connect_rtnl(Manager *m) {
 938         int fd, r;
 939
 940         assert(m);
 941
 942         fd = systemd_netlink_fd();
 943         if (fd < 0)
 944                 r = sd_netlink_open(&m->rtnl);
 945         else
 946                 r = sd_netlink_open_fd(&m->rtnl, fd);
 947         if (r < 0)
 948                 return r;
 949
 950         r = sd_netlink_inc_rcvbuf(m->rtnl, RCVBUF_SIZE);
 951         if (r < 0)
 952                 return r;
 953
 954         r = sd_netlink_attach_event(m->rtnl, m->event, 0);
 955         if (r < 0)
 956                 return r;
 957
 958         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link");
 959         if (r < 0)
 960                 return r;
 961
 962         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link");
 963         if (r < 0)
 964                 return r;
 965
 966         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address");
 967         if (r < 0)
 968                 return r;
 969
 970         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address");
 971         if (r < 0)
 972                 return r;
 973
 974         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route");
 975         if (r < 0)
 976                 return r;
 977
 978         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route");
 979         if (r < 0)
 980                 return r;
 981
 982         r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule");
 983         if (r < 0)
 984                 return r;
 985
 986         r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule");
 987         if (r < 0)
 988                 return r;
 989
 990         return 0;
 991 }
 992
 993 static int ordered_set_put_in_addr_data(OrderedSet *s, const struct in_addr_data *address) {
 994         char *p;
 995         int r;
 996
 997         assert(s);
 998         assert(address);
 999
1000         r = in_addr_to_string(address->family, &address->address, &p);
1001         if (r < 0)
1002                 return r;
1003
1004         r = ordered_set_consume(s, p);
1005         if (r == -EEXIST)
1006                 return 0;
1007
1008         return r;
1009 }
1010
1011 static int ordered_set_put_in_addr_datav(OrderedSet *s, const struct in_addr_data *addresses, unsigned n) {
1012         int r, c = 0;
1013         unsigned i;
1014
1015         assert(s);
1016         assert(addresses || n == 0);
1017
1018         for (i = 0; i < n; i++) {
1019                 r = ordered_set_put_in_addr_data(s, addresses+i);
1020                 if (r < 0)
1021                         return r;
1022
1023                 c += r;
1024         }
1025
1026         return c;
1027 }
1028
1029 static int ordered_set_put_in4_addr(OrderedSet *s, const struct in_addr *address) {
1030         char *p;
1031         int r;
1032
1033         assert(s);
1034         assert(address);
1035
1036         r = in_addr_to_string(AF_INET, (const union in_addr_union*) address, &p);
1037         if (r < 0)
1038                 return r;
1039
1040         r = ordered_set_consume(s, p);
1041         if (r == -EEXIST)
1042                 return 0;
1043
1044         return r;
1045 }
1046
1047 static int ordered_set_put_in4_addrv(OrderedSet *s, const struct in_addr *addresses, unsigned n) {
1048         int r, c = 0;
1049         unsigned i;
1050
1051         assert(s);
1052         assert(n == 0 || addresses);
1053
1054         for (i = 0; i < n; i++) {
1055                 r = ordered_set_put_in4_addr(s, addresses+i);
1056                 if (r < 0)
1057                         return r;
1058
1059                 c += r;
1060         }
1061
1062         return c;
1063 }
1064
1065 static void print_string_set(FILE *f, const char *field, OrderedSet *s) {
1066         bool space = false;
1067         Iterator i;
1068         char *p;
1069
1070         if (ordered_set_isempty(s))
1071                 return;
1072
1073         fputs(field, f);
1074
1075         ORDERED_SET_FOREACH(p, s, i)
1076                 fputs_with_space(f, p, NULL, &space);
1077
1078         fputc('\n', f);
1079 }
1080
1081 static int manager_save(Manager *m) {
1082         _cleanup_ordered_set_free_free_ OrderedSet *dns = NULL, *ntp = NULL, *search_domains = NULL, *route_domains = NULL;
1083         Link *link;
1084         Iterator i;
1085         _cleanup_free_ char *temp_path = NULL;
1086         _cleanup_fclose_ FILE *f = NULL;
1087         LinkOperationalState operstate = LINK_OPERSTATE_OFF;
1088         const char *operstate_str;
1089         int r;
1090
1091         assert(m);
1092         assert(m->state_file);
1093
1094         /* We add all NTP and DNS server to a set, to filter out duplicates */
1095         dns = ordered_set_new(&string_hash_ops);
1096         if (!dns)
1097                 return -ENOMEM;
1098
1099         ntp = ordered_set_new(&string_hash_ops);
1100         if (!ntp)
1101                 return -ENOMEM;
1102
1103         search_domains = ordered_set_new(&dns_name_hash_ops);
1104         if (!search_domains)
1105                 return -ENOMEM;
1106
1107         route_domains = ordered_set_new(&dns_name_hash_ops);
1108         if (!route_domains)
1109                 return -ENOMEM;
1110
1111         HASHMAP_FOREACH(link, m->links, i) {
1112                 if (link->flags & IFF_LOOPBACK)
1113                         continue;
1114
1115                 if (link->operstate > operstate)
1116                         operstate = link->operstate;
1117
1118                 if (!link->network)
1119                         continue;
1120
1121                 /* First add the static configured entries */
1122                 r = ordered_set_put_in_addr_datav(dns, link->network->dns, link->network->n_dns);
1123                 if (r < 0)
1124                         return r;
1125
1126                 r = ordered_set_put_strdupv(ntp, link->network->ntp);
1127                 if (r < 0)
1128                         return r;
1129
1130                 r = ordered_set_put_strdupv(search_domains, link->network->search_domains);
1131                 if (r < 0)
1132                         return r;
1133
1134                 r = ordered_set_put_strdupv(route_domains, link->network->route_domains);
1135                 if (r < 0)
1136                         return r;
1137
1138                 if (!link->dhcp_lease)
1139                         continue;
1140
1141                 /* Secondly, add the entries acquired via DHCP */
1142                 if (link->network->dhcp_use_dns) {
1143                         const struct in_addr *addresses;
1144
1145                         r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
1146                         if (r > 0) {
1147                                 r = ordered_set_put_in4_addrv(dns, addresses, r);
1148                                 if (r < 0)
1149                                         return r;
1150                         } else if (r < 0 && r != -ENODATA)
1151                                 return r;
1152                 }
1153
1154                 if (link->network->dhcp_use_ntp) {
1155                         const struct in_addr *addresses;
1156
1157                         r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
1158                         if (r > 0) {
1159                                 r = ordered_set_put_in4_addrv(ntp, addresses, r);
1160                                 if (r < 0)
1161                                         return r;
1162                         } else if (r < 0 && r != -ENODATA)
1163                                 return r;
1164                 }
1165
1166                 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
1167                         const char *domainname;
1168                         char **domains = NULL;
1169
1170                         OrderedSet *target_domains = (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) ? search_domains : route_domains;
1171                         r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname);
1172                         if (r >= 0) {
1173                                 r = ordered_set_put_strdup(target_domains, domainname);
1174                                 if (r < 0)
1175                                         return r;
1176                         } else if (r != -ENODATA)
1177                                 return r;
1178
1179                         r = sd_dhcp_lease_get_search_domains(link->dhcp_lease, &domains);
1180                         if (r >= 0) {
1181                                 r = ordered_set_put_strdupv(target_domains, domains);
1182                                 if (r < 0)
1183                                         return r;
1184                         } else if (r != -ENODATA)
1185                                 return r;
1186                 }
1187         }
1188
1189         operstate_str = link_operstate_to_string(operstate);
1190         assert(operstate_str);
1191
1192         r = fopen_temporary(m->state_file, &f, &temp_path);
1193         if (r < 0)
1194                 return r;
1195
1196         (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
1197         (void) fchmod(fileno(f), 0644);
1198
1199         fprintf(f,
1200                 "# This is private data. Do not parse.\n"
1201                 "OPER_STATE=%s\n", operstate_str);
1202
1203         print_string_set(f, "DNS=", dns);
1204         print_string_set(f, "NTP=", ntp);
1205         print_string_set(f, "DOMAINS=", search_domains);
1206         print_string_set(f, "ROUTE_DOMAINS=", route_domains);
1207
1208         r = routing_policy_serialize_rules(m->rules, f);
1209         if (r < 0)
1210                 goto fail;
1211
1212         r = fflush_and_check(f);
1213         if (r < 0)
1214                 goto fail;
1215
1216         if (rename(temp_path, m->state_file) < 0) {
1217                 r = -errno;
1218                 goto fail;
1219         }
1220
1221         if (m->operational_state != operstate) {
1222                 m->operational_state = operstate;
1223                 r = manager_send_changed(m, "OperationalState", NULL);
1224                 if (r < 0)
1225                         log_error_errno(r, "Could not emit changed OperationalState: %m");
1226         }
1227
1228         m->dirty = false;
1229
1230         return 0;
1231
1232 fail:
1233         (void) unlink(m->state_file);
1234         (void) unlink(temp_path);
1235
1236         return log_error_errno(r, "Failed to save network state to %s: %m", m->state_file);
1237 }
1238
1239 static int manager_dirty_handler(sd_event_source *s, void *userdata) {
1240         Manager *m = userdata;
1241         Link *link;
1242         Iterator i;
1243
1244         assert(m);
1245
1246         if (m->dirty)
1247                 manager_save(m);
1248
1249         SET_FOREACH(link, m->dirty_links, i)
1250                 if (link_save(link) >= 0)
1251                         link_clean(link);
1252
1253         return 1;
1254 }
1255
1256 Link *manager_dhcp6_prefix_get(Manager *m, struct in6_addr *addr) {
1257         assert_return(m, NULL);
1258         assert_return(addr, NULL);
1259
1260         return hashmap_get(m->dhcp6_prefixes, addr);
1261 }
1262
1263 static int dhcp6_route_add_handler(sd_netlink *nl, sd_netlink_message *m, Link *link) {
1264         int r;
1265
1266         assert(link);
1267
1268         r = sd_netlink_message_get_errno(m);
1269         if (r < 0 && r != -EEXIST)
1270                 log_link_debug_errno(link, r, "Received error adding DHCPv6 Prefix Delegation route: %m");
1271
1272         return 0;
1273 }
1274
1275 static void dhcp6_prefixes_hash_func(const struct in6_addr *addr, struct siphash *state) {
1276         assert(addr);
1277
1278         siphash24_compress(addr, sizeof(*addr), state);
1279 }
1280
1281 static int dhcp6_prefixes_compare_func(const struct in6_addr *a, const struct in6_addr *b) {
1282         return memcmp(a, b, sizeof(*a));
1283 }
1284
1285 DEFINE_PRIVATE_HASH_OPS(dhcp6_prefixes_hash_ops, struct in6_addr, dhcp6_prefixes_hash_func, dhcp6_prefixes_compare_func);
1286
1287 int manager_dhcp6_prefix_add(Manager *m, struct in6_addr *addr, Link *link) {
1288         _cleanup_free_ char *buf = NULL;
1289         Route *route;
1290         int r;
1291
1292         assert_return(m, -EINVAL);
1293         assert_return(addr, -EINVAL);
1294
1295         r = route_add(link, AF_INET6, (union in_addr_union *) addr, 64,
1296                       0, 0, 0, &route);
1297         if (r < 0)
1298                 return r;
1299
1300         r = route_configure(route, link, dhcp6_route_add_handler);
1301         if (r < 0)
1302                 return r;
1303
1304         (void) in_addr_to_string(AF_INET6, (union in_addr_union *) addr, &buf);
1305         log_link_debug(link, "Adding prefix route %s/64", strnull(buf));
1306
1307         r = hashmap_ensure_allocated(&m->dhcp6_prefixes, &dhcp6_prefixes_hash_ops);
1308         if (r < 0)
1309                 return r;
1310
1311         return hashmap_put(m->dhcp6_prefixes, addr, link);
1312 }
1313
1314 static int dhcp6_route_remove_handler(sd_netlink *nl, sd_netlink_message *m, Link *link) {
1315         int r;
1316
1317         assert(link);
1318
1319         r = sd_netlink_message_get_errno(m);
1320         if (r < 0)
1321                 log_link_debug_errno(link, r, "Received error on DHCPv6 Prefix Delegation route removal: %m");
1322
1323         return 1;
1324 }
1325
1326 static int manager_dhcp6_prefix_remove(Manager *m, struct in6_addr *addr) {
1327         _cleanup_free_ char *buf = NULL;
1328         Route *route;
1329         Link *l;
1330         int r;
1331
1332         assert_return(m, -EINVAL);
1333         assert_return(addr, -EINVAL);
1334
1335         l = hashmap_remove(m->dhcp6_prefixes, addr);
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,
1341                       0, 0, 0, &route);
1342         if (r < 0)
1343                 return r;
1344
1345         r = route_remove(route, l, dhcp6_route_remove_handler);
1346         if (r < 0)
1347                 return r;
1348
1349         (void) in_addr_to_string(AF_INET6, (union in_addr_union *) addr, &buf);
1350         log_link_debug(l, "Removing prefix route %s/64", strnull(buf));
1351
1352         return 0;
1353 }
1354
1355 int manager_dhcp6_prefix_remove_all(Manager *m, Link *link) {
1356         struct in6_addr *addr;
1357         Iterator i;
1358         Link *l;
1359
1360         assert_return(m, -EINVAL);
1361         assert_return(link, -EINVAL);
1362
1363         HASHMAP_FOREACH_KEY(l, addr, m->dhcp6_prefixes, i) {
1364                 if (l != link)
1365                         continue;
1366
1367                 (void) manager_dhcp6_prefix_remove(m, addr);
1368         }
1369
1370         return 0;
1371 }
1372
1373 int manager_new(Manager **ret) {
1374         _cleanup_(manager_freep) Manager *m = NULL;
1375         int r;
1376
1377         m = new0(Manager, 1);
1378         if (!m)
1379                 return -ENOMEM;
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         LIST_HEAD_INIT(m->networks);
1410
1411         r = sd_resolve_default(&m->resolve);
1412         if (r < 0)
1413                 return r;
1414
1415         r = sd_resolve_attach_event(m->resolve, m->event, 0);
1416         if (r < 0)
1417                 return r;
1418
1419         r = setup_default_address_pool(m);
1420         if (r < 0)
1421                 return r;
1422
1423         m->duid.type = DUID_TYPE_EN;
1424
1425         (void) routing_policy_load_rules(m->state_file, &m->rules_saved);
1426
1427         *ret = TAKE_PTR(m);
1428
1429         return 0;
1430 }
1431
1432 void manager_free(Manager *m) {
1433         AddressPool *pool;
1434         Network *network;
1435         Link *link;
1436
1437         if (!m)
1438                 return;
1439
1440         free(m->state_file);
1441
1442         sd_netlink_unref(m->rtnl);
1443         sd_netlink_unref(m->genl);
1444         sd_resolve_unref(m->resolve);
1445
1446         while ((network = m->networks))
1447                 network_free(network);
1448
1449         while ((link = hashmap_first(m->dhcp6_prefixes)))
1450                 manager_dhcp6_prefix_remove_all(m, link);
1451         hashmap_free(m->dhcp6_prefixes);
1452
1453         while ((link = hashmap_steal_first(m->links))) {
1454                 if (link->dhcp6_client)
1455                         (void) dhcp6_lease_pd_prefix_lost(link->dhcp6_client, link);
1456                 link_unref(link);
1457         }
1458
1459         m->dirty_links = set_free_with_destructor(m->dirty_links, link_unref);
1460         m->links = hashmap_free(m->links);
1461         m->links_requesting_uuid = set_free(m->links_requesting_uuid);
1462         set_free(m->duids_requesting_uuid);
1463
1464         hashmap_free(m->networks_by_name);
1465
1466         m->netdevs = hashmap_free_with_destructor(m->netdevs, netdev_unref);
1467
1468         while ((pool = m->address_pools))
1469                 address_pool_free(pool);
1470
1471         /* routing_policy_rule_free() access m->rules and m->rules_foreign.
1472          * So, it is necessary to set NULL after the sets are freed. */
1473         m->rules = set_free_with_destructor(m->rules, routing_policy_rule_free);
1474         m->rules_foreign = set_free_with_destructor(m->rules_foreign, routing_policy_rule_free);
1475         set_free_with_destructor(m->rules_saved, routing_policy_rule_free);
1476
1477         sd_event_unref(m->event);
1478
1479         sd_device_monitor_unref(m->device_monitor);
1480
1481         sd_bus_flush_close_unref(m->bus);
1482
1483         free(m->dynamic_timezone);
1484         free(m->dynamic_hostname);
1485
1486         free(m);
1487 }
1488
1489 int manager_start(Manager *m) {
1490         Link *link;
1491         Iterator i;
1492
1493         assert(m);
1494
1495         /* The dirty handler will deal with future serialization, but the first one
1496            must be done explicitly. */
1497
1498         manager_save(m);
1499
1500         HASHMAP_FOREACH(link, m->links, i)
1501                 link_save(link);
1502
1503         return 0;
1504 }
1505
1506 int manager_load_config(Manager *m) {
1507         int r;
1508
1509         /* update timestamp */
1510         paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, true);
1511
1512         r = netdev_load(m);
1513         if (r < 0)
1514                 return r;
1515
1516         r = network_load(m);
1517         if (r < 0)
1518                 return r;
1519
1520         return 0;
1521 }
1522
1523 bool manager_should_reload(Manager *m) {
1524         return paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, false);
1525 }
1526
1527 int manager_rtnl_enumerate_links(Manager *m) {
1528         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1529         sd_netlink_message *link;
1530         int r;
1531
1532         assert(m);
1533         assert(m->rtnl);
1534
1535         r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);
1536         if (r < 0)
1537                 return r;
1538
1539         r = sd_netlink_message_request_dump(req, true);
1540         if (r < 0)
1541                 return r;
1542
1543         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1544         if (r < 0)
1545                 return r;
1546
1547         for (link = reply; link; link = sd_netlink_message_next(link)) {
1548                 int k;
1549
1550                 m->enumerating = true;
1551
1552                 k = manager_rtnl_process_link(m->rtnl, link, m);
1553                 if (k < 0)
1554                         r = k;
1555
1556                 m->enumerating = false;
1557         }
1558
1559         return r;
1560 }
1561
1562 int manager_rtnl_enumerate_addresses(Manager *m) {
1563         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1564         sd_netlink_message *addr;
1565         int r;
1566
1567         assert(m);
1568         assert(m->rtnl);
1569
1570         r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, 0);
1571         if (r < 0)
1572                 return r;
1573
1574         r = sd_netlink_message_request_dump(req, true);
1575         if (r < 0)
1576                 return r;
1577
1578         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1579         if (r < 0)
1580                 return r;
1581
1582         for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
1583                 int k;
1584
1585                 m->enumerating = true;
1586
1587                 k = manager_rtnl_process_address(m->rtnl, addr, m);
1588                 if (k < 0)
1589                         r = k;
1590
1591                 m->enumerating = false;
1592         }
1593
1594         return r;
1595 }
1596
1597 int manager_rtnl_enumerate_routes(Manager *m) {
1598         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1599         sd_netlink_message *route;
1600         int r;
1601
1602         assert(m);
1603         assert(m->rtnl);
1604
1605         r = sd_rtnl_message_new_route(m->rtnl, &req, RTM_GETROUTE, 0, 0);
1606         if (r < 0)
1607                 return r;
1608
1609         r = sd_netlink_message_request_dump(req, true);
1610         if (r < 0)
1611                 return r;
1612
1613         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1614         if (r < 0)
1615                 return r;
1616
1617         for (route = reply; route; route = sd_netlink_message_next(route)) {
1618                 int k;
1619
1620                 m->enumerating = true;
1621
1622                 k = manager_rtnl_process_route(m->rtnl, route, m);
1623                 if (k < 0)
1624                         r = k;
1625
1626                 m->enumerating = false;
1627         }
1628
1629         return r;
1630 }
1631
1632 int manager_rtnl_enumerate_rules(Manager *m) {
1633         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1634         sd_netlink_message *rule;
1635         int r;
1636
1637         assert(m);
1638         assert(m->rtnl);
1639
1640         r = sd_rtnl_message_new_routing_policy_rule(m->rtnl, &req, RTM_GETRULE, 0);
1641         if (r < 0)
1642                 return r;
1643
1644         r = sd_netlink_message_request_dump(req, true);
1645         if (r < 0)
1646                 return r;
1647
1648         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1649         if (r < 0) {
1650                 if (r == -EOPNOTSUPP) {
1651                         log_debug("FIB Rules are not supported by the kernel. Ignoring.");
1652                         return 0;
1653                 }
1654
1655                 return r;
1656         }
1657
1658         for (rule = reply; rule; rule = sd_netlink_message_next(rule)) {
1659                 int k;
1660
1661                 m->enumerating = true;
1662
1663                 k = manager_rtnl_process_rule(m->rtnl, rule, m);
1664                 if (k < 0)
1665                         r = k;
1666
1667                 m->enumerating = false;
1668         }
1669
1670         return r;
1671 }
1672
1673 int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, union in_addr_union *found) {
1674         AddressPool *p;
1675         int r;
1676
1677         assert(m);
1678         assert(prefixlen > 0);
1679         assert(found);
1680
1681         LIST_FOREACH(address_pools, p, m->address_pools) {
1682                 if (p->family != family)
1683                         continue;
1684
1685                 r = address_pool_acquire(p, prefixlen, found);
1686                 if (r != 0)
1687                         return r;
1688         }
1689
1690         return 0;
1691 }
1692
1693 Link* manager_find_uplink(Manager *m, Link *exclude) {
1694         _cleanup_free_ struct local_address *gateways = NULL;
1695         int n, i;
1696
1697         assert(m);
1698
1699         /* Looks for a suitable "uplink", via black magic: an
1700          * interface that is up and where the default route with the
1701          * highest priority points to. */
1702
1703         n = local_gateways(m->rtnl, 0, AF_UNSPEC, &gateways);
1704         if (n < 0) {
1705                 log_warning_errno(n, "Failed to determine list of default gateways: %m");
1706                 return NULL;
1707         }
1708
1709         for (i = 0; i < n; i++) {
1710                 Link *link;
1711
1712                 link = hashmap_get(m->links, INT_TO_PTR(gateways[i].ifindex));
1713                 if (!link) {
1714                         log_debug("Weird, found a gateway for a link we don't know. Ignoring.");
1715                         continue;
1716                 }
1717
1718                 if (link == exclude)
1719                         continue;
1720
1721                 if (link->operstate < LINK_OPERSTATE_ROUTABLE)
1722                         continue;
1723
1724                 return link;
1725         }
1726
1727         return NULL;
1728 }
1729
1730 void manager_dirty(Manager *manager) {
1731         assert(manager);
1732
1733         /* the serialized state in /run is no longer up-to-date */
1734         manager->dirty = true;
1735 }
1736
1737 static int set_hostname_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
1738         Manager *manager = userdata;
1739         const sd_bus_error *e;
1740
1741         assert(m);
1742         assert(manager);
1743
1744         e = sd_bus_message_get_error(m);
1745         if (e)
1746                 log_warning_errno(sd_bus_error_get_errno(e), "Could not set hostname: %s", e->message);
1747
1748         return 1;
1749 }
1750
1751 int manager_set_hostname(Manager *m, const char *hostname) {
1752         int r;
1753
1754         log_debug("Setting transient hostname: '%s'", strna(hostname));
1755
1756         if (free_and_strdup(&m->dynamic_hostname, hostname) < 0)
1757                 return log_oom();
1758
1759         if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
1760                 log_debug("Not connected to system bus, setting hostname later.");
1761                 return 0;
1762         }
1763
1764         r = sd_bus_call_method_async(
1765                         m->bus,
1766                         NULL,
1767                         "org.freedesktop.hostname1",
1768                         "/org/freedesktop/hostname1",
1769                         "org.freedesktop.hostname1",
1770                         "SetHostname",
1771                         set_hostname_handler,
1772                         m,
1773                         "sb",
1774                         hostname,
1775                         false);
1776
1777         if (r < 0)
1778                 return log_error_errno(r, "Could not set transient hostname: %m");
1779
1780         return 0;
1781 }
1782
1783 static int set_timezone_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
1784         Manager *manager = userdata;
1785         const sd_bus_error *e;
1786
1787         assert(m);
1788         assert(manager);
1789
1790         e = sd_bus_message_get_error(m);
1791         if (e)
1792                 log_warning_errno(sd_bus_error_get_errno(e), "Could not set timezone: %s", e->message);
1793
1794         return 1;
1795 }
1796
1797 int manager_set_timezone(Manager *m, const char *tz) {
1798         int r;
1799
1800         assert(m);
1801         assert(tz);
1802
1803         log_debug("Setting system timezone: '%s'", tz);
1804         if (free_and_strdup(&m->dynamic_timezone, tz) < 0)
1805                 return log_oom();
1806
1807         if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
1808                 log_debug("Not connected to system bus, setting timezone later.");
1809                 return 0;
1810         }
1811
1812         r = sd_bus_call_method_async(
1813                         m->bus,
1814                         NULL,
1815                         "org.freedesktop.timedate1",
1816                         "/org/freedesktop/timedate1",
1817                         "org.freedesktop.timedate1",
1818                         "SetTimezone",
1819                         set_timezone_handler,
1820                         m,
1821                         "sb",
1822                         tz,
1823                         false);
1824         if (r < 0)
1825                 return log_error_errno(r, "Could not set timezone: %m");
1826
1827         return 0;
1828 }
1829
1830 int manager_request_product_uuid(Manager *m, Link *link) {
1831         int r;
1832
1833         assert(m);
1834
1835         if (m->has_product_uuid)
1836                 return 0;
1837
1838         log_debug("Requesting product UUID");
1839
1840         if (link) {
1841                 DUID *duid;
1842
1843                 assert_se(duid = link_get_duid(link));
1844
1845                 r = set_ensure_allocated(&m->links_requesting_uuid, NULL);
1846                 if (r < 0)
1847                         return log_oom();
1848
1849                 r = set_ensure_allocated(&m->duids_requesting_uuid, NULL);
1850                 if (r < 0)
1851                         return log_oom();
1852
1853                 r = set_put(m->links_requesting_uuid, link);
1854                 if (r < 0)
1855                         return log_oom();
1856
1857                 r = set_put(m->duids_requesting_uuid, duid);
1858                 if (r < 0)
1859                         return log_oom();
1860         }
1861
1862         if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
1863                 log_debug("Not connected to system bus, requesting product UUID later.");
1864                 return 0;
1865         }
1866
1867         r = sd_bus_call_method_async(
1868                         m->bus,
1869                         NULL,
1870                         "org.freedesktop.hostname1",
1871                         "/org/freedesktop/hostname1",
1872                         "org.freedesktop.hostname1",
1873                         "GetProductUUID",
1874                         get_product_uuid_handler,
1875                         m,
1876                         "b",
1877                         false);
1878         if (r < 0)
1879                 return log_warning_errno(r, "Failed to get product UUID: %m");
1880
1881         return 0;
1882 }