src/network/networkd-manager.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2013 Tom Gundersen <teg@jklm.no>
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18  ***/
  19
  20 #include <sys/socket.h>
  21 #include <linux/if.h>
  22
  23 #include "sd-daemon.h"
  24 #include "sd-netlink.h"
  25
  26 #include "alloc-util.h"
  27 #include "bus-util.h"
  28 #include "conf-parser.h"
  29 #include "def.h"
  30 #include "dns-domain.h"
  31 #include "fd-util.h"
  32 #include "fileio.h"
  33 #include "libudev-private.h"
  34 #include "local-addresses.h"
  35 #include "netlink-util.h"
  36 #include "networkd-manager.h"
  37 #include "ordered-set.h"
  38 #include "path-util.h"
  39 #include "set.h"
  40 #include "udev-util.h"
  41 #include "virt.h"
  42
  43 /* use 8 MB for receive socket kernel queue. */
  44 #define RCVBUF_SIZE    (8*1024*1024)
  45
  46 const char* const network_dirs[] = {
  47         "/etc/systemd/network",
  48         "/run/systemd/network",
  49         "/usr/lib/systemd/network",
  50 #ifdef HAVE_SPLIT_USR
  51         "/lib/systemd/network",
  52 #endif
  53         NULL};
  54
  55 static int setup_default_address_pool(Manager *m) {
  56         AddressPool *p;
  57         int r;
  58
  59         assert(m);
  60
  61         /* Add in the well-known private address ranges. */
  62
  63         r = address_pool_new_from_string(m, &p, AF_INET6, "fc00::", 7);
  64         if (r < 0)
  65                 return r;
  66
  67         r = address_pool_new_from_string(m, &p, AF_INET, "192.168.0.0", 16);
  68         if (r < 0)
  69                 return r;
  70
  71         r = address_pool_new_from_string(m, &p, AF_INET, "172.16.0.0", 12);
  72         if (r < 0)
  73                 return r;
  74
  75         r = address_pool_new_from_string(m, &p, AF_INET, "10.0.0.0", 8);
  76         if (r < 0)
  77                 return r;
  78
  79         return 0;
  80 }
  81
  82 static int on_bus_retry(sd_event_source *s, usec_t usec, void *userdata) {
  83         Manager *m = userdata;
  84
  85         assert(s);
  86         assert(m);
  87
  88         m->bus_retry_event_source = sd_event_source_unref(m->bus_retry_event_source);
  89
  90         manager_connect_bus(m);
  91
  92         return 0;
  93 }
  94
  95 static int manager_reset_all(Manager *m) {
  96         Link *link;
  97         Iterator i;
  98         int r;
  99
 100         assert(m);
 101
 102         HASHMAP_FOREACH(link, m->links, i) {
 103                 r = link_carrier_reset(link);
 104                 if (r < 0)
 105                         log_link_warning_errno(link, r, "Could not reset carrier: %m");
 106         }
 107
 108         return 0;
 109 }
 110
 111 static int match_prepare_for_sleep(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
 112         Manager *m = userdata;
 113         int b, r;
 114
 115         assert(message);
 116
 117         r = sd_bus_message_read(message, "b", &b);
 118         if (r < 0) {
 119                 log_debug_errno(r, "Failed to parse PrepareForSleep signal: %m");
 120                 return 0;
 121         }
 122
 123         if (b)
 124                 return 0;
 125
 126         log_debug("Coming back from suspend, resetting all connections...");
 127
 128         manager_reset_all(m);
 129
 130         return 0;
 131 }
 132
 133 int manager_connect_bus(Manager *m) {
 134         int r;
 135
 136         assert(m);
 137
 138         r = sd_bus_default_system(&m->bus);
 139         if (r == -ENOENT) {
 140                 /* We failed to connect? Yuck, we must be in early
 141                  * boot. Let's try in 5s again. As soon as we have
 142                  * kdbus we can stop doing this... */
 143
 144                 log_debug_errno(r, "Failed to connect to bus, trying again in 5s: %m");
 145
 146                 r = sd_event_add_time(m->event, &m->bus_retry_event_source, CLOCK_MONOTONIC, now(CLOCK_MONOTONIC) + 5*USEC_PER_SEC, 0, on_bus_retry, m);
 147                 if (r < 0)
 148                         return log_error_errno(r, "Failed to install bus reconnect time event: %m");
 149
 150                 return 0;
 151         }
 152
 153         if (r < 0)
 154                 return r;
 155
 156         r = sd_bus_add_match(m->bus, &m->prepare_for_sleep_slot,
 157                              "type='signal',"
 158                              "sender='org.freedesktop.login1',"
 159                              "interface='org.freedesktop.login1.Manager',"
 160                              "member='PrepareForSleep',"
 161                              "path='/org/freedesktop/login1'",
 162                              match_prepare_for_sleep,
 163                              m);
 164         if (r < 0)
 165                 return log_error_errno(r, "Failed to add match for PrepareForSleep: %m");
 166
 167         r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/network1", "org.freedesktop.network1.Manager", manager_vtable, m);
 168         if (r < 0)
 169                 return log_error_errno(r, "Failed to add manager object vtable: %m");
 170
 171         r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/link", "org.freedesktop.network1.Link", link_vtable, link_object_find, m);
 172         if (r < 0)
 173                return log_error_errno(r, "Failed to add link object vtable: %m");
 174
 175         r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/link", link_node_enumerator, m);
 176         if (r < 0)
 177                 return log_error_errno(r, "Failed to add link enumerator: %m");
 178
 179         r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/network", "org.freedesktop.network1.Network", network_vtable, network_object_find, m);
 180         if (r < 0)
 181                return log_error_errno(r, "Failed to add network object vtable: %m");
 182
 183         r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/network", network_node_enumerator, m);
 184         if (r < 0)
 185                 return log_error_errno(r, "Failed to add network enumerator: %m");
 186
 187         r = sd_bus_request_name(m->bus, "org.freedesktop.network1", 0);
 188         if (r < 0)
 189                 return log_error_errno(r, "Failed to register name: %m");
 190
 191         r = sd_bus_attach_event(m->bus, m->event, 0);
 192         if (r < 0)
 193                 return log_error_errno(r, "Failed to attach bus to event loop: %m");
 194
 195        /* Did we get a timezone or transient hostname from DHCP while D-Bus wasn't up yet? */
 196         if (m->dynamic_hostname) {
 197                 r = manager_set_hostname(m, m->dynamic_hostname);
 198                 if (r < 0)
 199                         return r;
 200         }
 201         if (m->dynamic_timezone) {
 202                 r = manager_set_timezone(m, m->dynamic_timezone);
 203                 if (r < 0)
 204                         return r;
 205         }
 206
 207         return 0;
 208 }
 209
 210 static int manager_udev_process_link(Manager *m, struct udev_device *device) {
 211         Link *link = NULL;
 212         int r, ifindex;
 213
 214         assert(m);
 215         assert(device);
 216
 217         if (!streq_ptr(udev_device_get_action(device), "add"))
 218                 return 0;
 219
 220         ifindex = udev_device_get_ifindex(device);
 221         if (ifindex <= 0) {
 222                 log_debug("Ignoring udev ADD event for device with invalid ifindex");
 223                 return 0;
 224         }
 225
 226         r = link_get(m, ifindex, &link);
 227         if (r == -ENODEV)
 228                 return 0;
 229         else if (r < 0)
 230                 return r;
 231
 232         r = link_initialized(link, device);
 233         if (r < 0)
 234                 return r;
 235
 236         return 0;
 237 }
 238
 239 static int manager_dispatch_link_udev(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
 240         Manager *m = userdata;
 241         struct udev_monitor *monitor = m->udev_monitor;
 242         _cleanup_udev_device_unref_ struct udev_device *device = NULL;
 243
 244         device = udev_monitor_receive_device(monitor);
 245         if (!device)
 246                 return -ENOMEM;
 247
 248         manager_udev_process_link(m, device);
 249         return 0;
 250 }
 251
 252 static int manager_connect_udev(Manager *m) {
 253         int r;
 254
 255         /* udev does not initialize devices inside containers,
 256          * so we rely on them being already initialized before
 257          * entering the container */
 258         if (detect_container() > 0)
 259                 return 0;
 260
 261         m->udev = udev_new();
 262         if (!m->udev)
 263                 return -ENOMEM;
 264
 265         m->udev_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
 266         if (!m->udev_monitor)
 267                 return -ENOMEM;
 268
 269         r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_monitor, "net", NULL);
 270         if (r < 0)
 271                 return log_error_errno(r, "Could not add udev monitor filter: %m");
 272
 273         r = udev_monitor_enable_receiving(m->udev_monitor);
 274         if (r < 0) {
 275                 log_error("Could not enable udev monitor");
 276                 return r;
 277         }
 278
 279         r = sd_event_add_io(m->event,
 280                         &m->udev_event_source,
 281                         udev_monitor_get_fd(m->udev_monitor),
 282                         EPOLLIN, manager_dispatch_link_udev,
 283                         m);
 284         if (r < 0)
 285                 return r;
 286
 287         r = sd_event_source_set_description(m->udev_event_source, "networkd-udev");
 288         if (r < 0)
 289                 return r;
 290
 291         return 0;
 292 }
 293
 294 int manager_rtnl_process_route(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 295         Manager *m = userdata;
 296         Link *link = NULL;
 297         uint16_t type;
 298         uint32_t ifindex, priority = 0;
 299         unsigned char protocol, scope, tos, table;
 300         int family;
 301         unsigned char dst_prefixlen, src_prefixlen;
 302         union in_addr_union dst = {}, gw = {}, src = {}, prefsrc = {};
 303         Route *route = NULL;
 304         int r;
 305
 306         assert(rtnl);
 307         assert(message);
 308         assert(m);
 309
 310         if (sd_netlink_message_is_error(message)) {
 311                 r = sd_netlink_message_get_errno(message);
 312                 if (r < 0)
 313                         log_warning_errno(r, "rtnl: failed to receive route: %m");
 314
 315                 return 0;
 316         }
 317
 318         r = sd_netlink_message_get_type(message, &type);
 319         if (r < 0) {
 320                 log_warning_errno(r, "rtnl: could not get message type: %m");
 321                 return 0;
 322         } else if (type != RTM_NEWROUTE && type != RTM_DELROUTE) {
 323                 log_warning("rtnl: received unexpected message type when processing route");
 324                 return 0;
 325         }
 326
 327         r = sd_netlink_message_read_u32(message, RTA_OIF, &ifindex);
 328         if (r == -ENODATA) {
 329                 log_debug("rtnl: received route without ifindex, ignoring");
 330                 return 0;
 331         } else if (r < 0) {
 332                 log_warning_errno(r, "rtnl: could not get ifindex from route, ignoring: %m");
 333                 return 0;
 334         } else if (ifindex <= 0) {
 335                 log_warning("rtnl: received route message with invalid ifindex, ignoring: %d", ifindex);
 336                 return 0;
 337         } else {
 338                 r = link_get(m, ifindex, &link);
 339                 if (r < 0 || !link) {
 340                         /* when enumerating we might be out of sync, but we will
 341                          * get the route again, so just ignore it */
 342                         if (!m->enumerating)
 343                                 log_warning("rtnl: received route for nonexistent link (%d), ignoring", ifindex);
 344                         return 0;
 345                 }
 346         }
 347
 348         r = sd_rtnl_message_route_get_family(message, &family);
 349         if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) {
 350                 log_link_warning(link, "rtnl: received address with invalid family, ignoring.");
 351                 return 0;
 352         }
 353
 354         r = sd_rtnl_message_route_get_protocol(message, &protocol);
 355         if (r < 0) {
 356                 log_warning_errno(r, "rtnl: could not get route protocol: %m");
 357                 return 0;
 358         }
 359
 360         switch (family) {
 361         case AF_INET:
 362                 r = sd_netlink_message_read_in_addr(message, RTA_DST, &dst.in);
 363                 if (r < 0 && r != -ENODATA) {
 364                         log_link_warning_errno(link, r, "rtnl: received route without valid destination, ignoring: %m");
 365                         return 0;
 366                 }
 367
 368                 r = sd_netlink_message_read_in_addr(message, RTA_GATEWAY, &gw.in);
 369                 if (r < 0 && r != -ENODATA) {
 370                         log_link_warning_errno(link, r, "rtnl: received route with invalid gateway, ignoring: %m");
 371                         return 0;
 372                 }
 373
 374                 r = sd_netlink_message_read_in_addr(message, RTA_SRC, &src.in);
 375                 if (r < 0 && r != -ENODATA) {
 376                         log_link_warning_errno(link, r, "rtnl: received route with invalid source, ignoring: %m");
 377                         return 0;
 378                 }
 379
 380                 r = sd_netlink_message_read_in_addr(message, RTA_PREFSRC, &prefsrc.in);
 381                 if (r < 0 && r != -ENODATA) {
 382                         log_link_warning_errno(link, r, "rtnl: received route with invalid preferred source, ignoring: %m");
 383                         return 0;
 384                 }
 385
 386                 break;
 387
 388         case AF_INET6:
 389                 r = sd_netlink_message_read_in6_addr(message, RTA_DST, &dst.in6);
 390                 if (r < 0 && r != -ENODATA) {
 391                         log_link_warning_errno(link, r, "rtnl: received route without valid destination, ignoring: %m");
 392                         return 0;
 393                 }
 394
 395                 r = sd_netlink_message_read_in6_addr(message, RTA_GATEWAY, &gw.in6);
 396                 if (r < 0 && r != -ENODATA) {
 397                         log_link_warning_errno(link, r, "rtnl: received route with invalid gateway, ignoring: %m");
 398                         return 0;
 399                 }
 400
 401                 r = sd_netlink_message_read_in6_addr(message, RTA_SRC, &src.in6);
 402                 if (r < 0 && r != -ENODATA) {
 403                         log_link_warning_errno(link, r, "rtnl: received route with invalid source, ignoring: %m");
 404                         return 0;
 405                 }
 406
 407                 r = sd_netlink_message_read_in6_addr(message, RTA_PREFSRC, &prefsrc.in6);
 408                 if (r < 0 && r != -ENODATA) {
 409                         log_link_warning_errno(link, r, "rtnl: received route with invalid preferred source, ignoring: %m");
 410                         return 0;
 411                 }
 412
 413                 break;
 414
 415         default:
 416                 log_link_debug(link, "rtnl: ignoring unsupported address family: %d", family);
 417                 return 0;
 418         }
 419
 420         r = sd_rtnl_message_route_get_dst_prefixlen(message, &dst_prefixlen);
 421         if (r < 0) {
 422                 log_link_warning_errno(link, r, "rtnl: received route with invalid destination prefixlen, ignoring: %m");
 423                 return 0;
 424         }
 425
 426         r = sd_rtnl_message_route_get_src_prefixlen(message, &src_prefixlen);
 427         if (r < 0) {
 428                 log_link_warning_errno(link, r, "rtnl: received route with invalid source prefixlen, ignoring: %m");
 429                 return 0;
 430         }
 431
 432         r = sd_rtnl_message_route_get_scope(message, &scope);
 433         if (r < 0) {
 434                 log_link_warning_errno(link, r, "rtnl: received route with invalid scope, ignoring: %m");
 435                 return 0;
 436         }
 437
 438         r = sd_rtnl_message_route_get_tos(message, &tos);
 439         if (r < 0) {
 440                 log_link_warning_errno(link, r, "rtnl: received route with invalid tos, ignoring: %m");
 441                 return 0;
 442         }
 443
 444         r = sd_rtnl_message_route_get_table(message, &table);
 445         if (r < 0) {
 446                 log_link_warning_errno(link, r, "rtnl: received route with invalid table, ignoring: %m");
 447                 return 0;
 448         }
 449
 450         r = sd_netlink_message_read_u32(message, RTA_PRIORITY, &priority);
 451         if (r < 0 && r != -ENODATA) {
 452                 log_link_warning_errno(link, r, "rtnl: received route with invalid priority, ignoring: %m");
 453                 return 0;
 454         }
 455
 456         route_get(link, family, &dst, dst_prefixlen, tos, priority, table, &route);
 457
 458         switch (type) {
 459         case RTM_NEWROUTE:
 460                 if (!route) {
 461                         /* A route appeared that we did not request */
 462                         r = route_add_foreign(link, family, &dst, dst_prefixlen, tos, priority, table, &route);
 463                         if (r < 0)
 464                                 return 0;
 465                 }
 466
 467                 route_update(route, &src, src_prefixlen, &gw, &prefsrc, scope, protocol);
 468
 469                 break;
 470
 471         case RTM_DELROUTE:
 472                 route_free(route);
 473                 break;
 474
 475         default:
 476                 assert_not_reached("Received invalid RTNL message type");
 477         }
 478
 479         return 1;
 480 }
 481
 482 int manager_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 483         Manager *m = userdata;
 484         Link *link = NULL;
 485         uint16_t type;
 486         unsigned char flags;
 487         int family;
 488         unsigned char prefixlen;
 489         unsigned char scope;
 490         union in_addr_union in_addr;
 491         struct ifa_cacheinfo cinfo;
 492         Address *address = NULL;
 493         char buf[INET6_ADDRSTRLEN], valid_buf[FORMAT_TIMESPAN_MAX];
 494         const char *valid_str = NULL;
 495         int r, ifindex;
 496
 497         assert(rtnl);
 498         assert(message);
 499         assert(m);
 500
 501         if (sd_netlink_message_is_error(message)) {
 502                 r = sd_netlink_message_get_errno(message);
 503                 if (r < 0)
 504                         log_warning_errno(r, "rtnl: failed to receive address: %m");
 505
 506                 return 0;
 507         }
 508
 509         r = sd_netlink_message_get_type(message, &type);
 510         if (r < 0) {
 511                 log_warning_errno(r, "rtnl: could not get message type: %m");
 512                 return 0;
 513         } else if (type != RTM_NEWADDR && type != RTM_DELADDR) {
 514                 log_warning("rtnl: received unexpected message type when processing address");
 515                 return 0;
 516         }
 517
 518         r = sd_rtnl_message_addr_get_ifindex(message, &ifindex);
 519         if (r < 0) {
 520                 log_warning_errno(r, "rtnl: could not get ifindex from address: %m");
 521                 return 0;
 522         } else if (ifindex <= 0) {
 523                 log_warning("rtnl: received address message with invalid ifindex: %d", ifindex);
 524                 return 0;
 525         } else {
 526                 r = link_get(m, ifindex, &link);
 527                 if (r < 0 || !link) {
 528                         /* when enumerating we might be out of sync, but we will
 529                          * get the address again, so just ignore it */
 530                         if (!m->enumerating)
 531                                 log_warning("rtnl: received address for nonexistent link (%d), ignoring", ifindex);
 532                         return 0;
 533                 }
 534         }
 535
 536         r = sd_rtnl_message_addr_get_family(message, &family);
 537         if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) {
 538                 log_link_warning(link, "rtnl: received address with invalid family, ignoring.");
 539                 return 0;
 540         }
 541
 542         r = sd_rtnl_message_addr_get_prefixlen(message, &prefixlen);
 543         if (r < 0) {
 544                 log_link_warning_errno(link, r, "rtnl: received address with invalid prefixlen, ignoring: %m");
 545                 return 0;
 546         }
 547
 548         r = sd_rtnl_message_addr_get_scope(message, &scope);
 549         if (r < 0) {
 550                 log_link_warning_errno(link, r, "rtnl: received address with invalid scope, ignoring: %m");
 551                 return 0;
 552         }
 553
 554         r = sd_rtnl_message_addr_get_flags(message, &flags);
 555         if (r < 0) {
 556                 log_link_warning_errno(link, r, "rtnl: received address with invalid flags, ignoring: %m");
 557                 return 0;
 558         }
 559
 560         switch (family) {
 561         case AF_INET:
 562                 r = sd_netlink_message_read_in_addr(message, IFA_LOCAL, &in_addr.in);
 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         case AF_INET6:
 571                 r = sd_netlink_message_read_in6_addr(message, IFA_ADDRESS, &in_addr.in6);
 572                 if (r < 0) {
 573                         log_link_warning_errno(link, r, "rtnl: received address without valid address, ignoring: %m");
 574                         return 0;
 575                 }
 576
 577                 break;
 578
 579         default:
 580                 log_link_debug(link, "rtnl: ignoring unsupported address family: %d", family);
 581         }
 582
 583         if (!inet_ntop(family, &in_addr, buf, INET6_ADDRSTRLEN)) {
 584                 log_link_warning(link, "Could not print address");
 585                 return 0;
 586         }
 587
 588         r = sd_netlink_message_read_cache_info(message, IFA_CACHEINFO, &cinfo);
 589         if (r >= 0) {
 590                 if (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
 596         address_get(link, family, &in_addr, prefixlen, &address);
 597
 598         switch (type) {
 599         case RTM_NEWADDR:
 600                 if (address)
 601                         log_link_debug(link, "Updating address: %s/%u (valid %s%s)", buf, prefixlen,
 602                                        valid_str ? "for " : "forever", valid_str ?: "");
 603                 else {
 604                         /* An address appeared that we did not request */
 605                         r = address_add_foreign(link, family, &in_addr, prefixlen, &address);
 606                         if (r < 0) {
 607                                 log_link_warning_errno(link, r, "Failed to add address %s/%u: %m", buf, prefixlen);
 608                                 return 0;
 609                         } else
 610                                 log_link_debug(link, "Adding address: %s/%u (valid %s%s)", buf, prefixlen,
 611                                                valid_str ? "for " : "forever", valid_str ?: "");
 612                 }
 613
 614                 address_update(address, flags, scope, &cinfo);
 615
 616                 break;
 617
 618         case RTM_DELADDR:
 619
 620                 if (address) {
 621                         log_link_debug(link, "Removing address: %s/%u (valid %s%s)", buf, prefixlen,
 622                                        valid_str ? "for " : "forever", valid_str ?: "");
 623                         address_drop(address);
 624                 } else
 625                         log_link_warning(link, "Removing non-existent address: %s/%u (valid %s%s)", buf, prefixlen,
 626                                          valid_str ? "for " : "forever", valid_str ?: "");
 627
 628                 break;
 629         default:
 630                 assert_not_reached("Received invalid RTNL message type");
 631         }
 632
 633         return 1;
 634 }
 635
 636 static int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 637         Manager *m = userdata;
 638         Link *link = NULL;
 639         NetDev *netdev = NULL;
 640         uint16_t type;
 641         const char *name;
 642         int r, ifindex;
 643
 644         assert(rtnl);
 645         assert(message);
 646         assert(m);
 647
 648         if (sd_netlink_message_is_error(message)) {
 649                 r = sd_netlink_message_get_errno(message);
 650                 if (r < 0)
 651                         log_warning_errno(r, "rtnl: Could not receive link: %m");
 652
 653                 return 0;
 654         }
 655
 656         r = sd_netlink_message_get_type(message, &type);
 657         if (r < 0) {
 658                 log_warning_errno(r, "rtnl: Could not get message type: %m");
 659                 return 0;
 660         } else if (type != RTM_NEWLINK && type != RTM_DELLINK) {
 661                 log_warning("rtnl: Received unexpected message type when processing link");
 662                 return 0;
 663         }
 664
 665         r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
 666         if (r < 0) {
 667                 log_warning_errno(r, "rtnl: Could not get ifindex from link: %m");
 668                 return 0;
 669         } else if (ifindex <= 0) {
 670                 log_warning("rtnl: received link message with invalid ifindex: %d", ifindex);
 671                 return 0;
 672         }
 673
 674         r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
 675         if (r < 0) {
 676                 log_warning_errno(r, "rtnl: Received link message without ifname: %m");
 677                 return 0;
 678         }
 679
 680         (void) link_get(m, ifindex, &link);
 681         (void) netdev_get(m, name, &netdev);
 682
 683         switch (type) {
 684         case RTM_NEWLINK:
 685                 if (!link) {
 686                         /* link is new, so add it */
 687                         r = link_add(m, message, &link);
 688                         if (r < 0) {
 689                                 log_warning_errno(r, "Could not add new link: %m");
 690                                 return 0;
 691                         }
 692                 }
 693
 694                 if (netdev) {
 695                         /* netdev exists, so make sure the ifindex matches */
 696                         r = netdev_set_ifindex(netdev, message);
 697                         if (r < 0) {
 698                                 log_warning_errno(r, "Could not set ifindex on netdev: %m");
 699                                 return 0;
 700                         }
 701                 }
 702
 703                 r = link_update(link, message);
 704                 if (r < 0)
 705                         return 0;
 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 static int systemd_netlink_fd(void) {
 723         int n, fd, rtnl_fd = -EINVAL;
 724
 725         n = sd_listen_fds(true);
 726         if (n <= 0)
 727                 return -EINVAL;
 728
 729         for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++) {
 730                 if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) {
 731                         if (rtnl_fd >= 0)
 732                                 return -EINVAL;
 733
 734                         rtnl_fd = fd;
 735                 }
 736         }
 737
 738         return rtnl_fd;
 739 }
 740
 741 static int manager_connect_rtnl(Manager *m) {
 742         int fd, r;
 743
 744         assert(m);
 745
 746         fd = systemd_netlink_fd();
 747         if (fd < 0)
 748                 r = sd_netlink_open(&m->rtnl);
 749         else
 750                 r = sd_netlink_open_fd(&m->rtnl, fd);
 751         if (r < 0)
 752                 return r;
 753
 754         r = sd_netlink_inc_rcvbuf(m->rtnl, RCVBUF_SIZE);
 755         if (r < 0)
 756                 return r;
 757
 758         r = sd_netlink_attach_event(m->rtnl, m->event, 0);
 759         if (r < 0)
 760                 return r;
 761
 762         r = sd_netlink_add_match(m->rtnl, RTM_NEWLINK, &manager_rtnl_process_link, m);
 763         if (r < 0)
 764                 return r;
 765
 766         r = sd_netlink_add_match(m->rtnl, RTM_DELLINK, &manager_rtnl_process_link, m);
 767         if (r < 0)
 768                 return r;
 769
 770         r = sd_netlink_add_match(m->rtnl, RTM_NEWADDR, &manager_rtnl_process_address, m);
 771         if (r < 0)
 772                 return r;
 773
 774         r = sd_netlink_add_match(m->rtnl, RTM_DELADDR, &manager_rtnl_process_address, m);
 775         if (r < 0)
 776                 return r;
 777
 778         r = sd_netlink_add_match(m->rtnl, RTM_NEWROUTE, &manager_rtnl_process_route, m);
 779         if (r < 0)
 780                 return r;
 781
 782         r = sd_netlink_add_match(m->rtnl, RTM_DELROUTE, &manager_rtnl_process_route, m);
 783         if (r < 0)
 784                 return r;
 785
 786         return 0;
 787 }
 788
 789 static int ordered_set_put_in_addr_data(OrderedSet *s, const struct in_addr_data *address) {
 790         char *p;
 791         int r;
 792
 793         assert(s);
 794         assert(address);
 795
 796         r = in_addr_to_string(address->family, &address->address, &p);
 797         if (r < 0)
 798                 return r;
 799
 800         r = ordered_set_consume(s, p);
 801         if (r == -EEXIST)
 802                 return 0;
 803
 804         return r;
 805 }
 806
 807 static int ordered_set_put_in_addr_datav(OrderedSet *s, const struct in_addr_data *addresses, unsigned n) {
 808         int r, c = 0;
 809         unsigned i;
 810
 811         assert(s);
 812         assert(addresses || n == 0);
 813
 814         for (i = 0; i < n; i++) {
 815                 r = ordered_set_put_in_addr_data(s, addresses+i);
 816                 if (r < 0)
 817                         return r;
 818
 819                 c += r;
 820         }
 821
 822         return c;
 823 }
 824
 825 static int ordered_set_put_in4_addr(OrderedSet *s, const struct in_addr *address) {
 826         char *p;
 827         int r;
 828
 829         assert(s);
 830         assert(address);
 831
 832         r = in_addr_to_string(AF_INET, (const union in_addr_union*) address, &p);
 833         if (r < 0)
 834                 return r;
 835
 836         r = ordered_set_consume(s, p);
 837         if (r == -EEXIST)
 838                 return 0;
 839
 840         return r;
 841 }
 842
 843 static int ordered_set_put_in4_addrv(OrderedSet *s, const struct in_addr *addresses, unsigned n) {
 844         int r, c = 0;
 845         unsigned i;
 846
 847         assert(s);
 848         assert(n == 0 || addresses);
 849
 850         for (i = 0; i < n; i++) {
 851                 r = ordered_set_put_in4_addr(s, addresses+i);
 852                 if (r < 0)
 853                         return r;
 854
 855                 c += r;
 856         }
 857
 858         return c;
 859 }
 860
 861 static void print_string_set(FILE *f, const char *field, OrderedSet *s) {
 862         bool space = false;
 863         Iterator i;
 864         char *p;
 865
 866         if (ordered_set_isempty(s))
 867                 return;
 868
 869         fputs(field, f);
 870
 871         ORDERED_SET_FOREACH(p, s, i)
 872                 fputs_with_space(f, p, NULL, &space);
 873
 874         fputc('\n', f);
 875 }
 876
 877 static int manager_save(Manager *m) {
 878         _cleanup_ordered_set_free_free_ OrderedSet *dns = NULL, *ntp = NULL, *search_domains = NULL, *route_domains = NULL;
 879         Link *link;
 880         Iterator i;
 881         _cleanup_free_ char *temp_path = NULL;
 882         _cleanup_fclose_ FILE *f = NULL;
 883         LinkOperationalState operstate = LINK_OPERSTATE_OFF;
 884         const char *operstate_str;
 885         int r;
 886
 887         assert(m);
 888         assert(m->state_file);
 889
 890         /* We add all NTP and DNS server to a set, to filter out duplicates */
 891         dns = ordered_set_new(&string_hash_ops);
 892         if (!dns)
 893                 return -ENOMEM;
 894
 895         ntp = ordered_set_new(&string_hash_ops);
 896         if (!ntp)
 897                 return -ENOMEM;
 898
 899         search_domains = ordered_set_new(&dns_name_hash_ops);
 900         if (!search_domains)
 901                 return -ENOMEM;
 902
 903         route_domains = ordered_set_new(&dns_name_hash_ops);
 904         if (!route_domains)
 905                 return -ENOMEM;
 906
 907         HASHMAP_FOREACH(link, m->links, i) {
 908                 if (link->flags & IFF_LOOPBACK)
 909                         continue;
 910
 911                 if (link->operstate > operstate)
 912                         operstate = link->operstate;
 913
 914                 if (!link->network)
 915                         continue;
 916
 917                 /* First add the static configured entries */
 918                 r = ordered_set_put_in_addr_datav(dns, link->network->dns, link->network->n_dns);
 919                 if (r < 0)
 920                         return r;
 921
 922                 r = ordered_set_put_strdupv(ntp, link->network->ntp);
 923                 if (r < 0)
 924                         return r;
 925
 926                 r = ordered_set_put_strdupv(search_domains, link->network->search_domains);
 927                 if (r < 0)
 928                         return r;
 929
 930                 r = ordered_set_put_strdupv(route_domains, link->network->route_domains);
 931                 if (r < 0)
 932                         return r;
 933
 934                 if (!link->dhcp_lease)
 935                         continue;
 936
 937                 /* Secondly, add the entries acquired via DHCP */
 938                 if (link->network->dhcp_use_dns) {
 939                         const struct in_addr *addresses;
 940
 941                         r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
 942                         if (r > 0) {
 943                                 r = ordered_set_put_in4_addrv(dns, addresses, r);
 944                                 if (r < 0)
 945                                         return r;
 946                         } else if (r < 0 && r != -ENODATA)
 947                                 return r;
 948                 }
 949
 950                 if (link->network->dhcp_use_ntp) {
 951                         const struct in_addr *addresses;
 952
 953                         r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
 954                         if (r > 0) {
 955                                 r = ordered_set_put_in4_addrv(ntp, addresses, r);
 956                                 if (r < 0)
 957                                         return r;
 958                         } else if (r < 0 && r != -ENODATA)
 959                                 return r;
 960                 }
 961
 962                 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
 963                         const char *domainname;
 964
 965                         r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname);
 966                         if (r >= 0) {
 967
 968                                 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES)
 969                                         r = ordered_set_put_strdup(search_domains, domainname);
 970                                 else
 971                                         r = ordered_set_put_strdup(route_domains, domainname);
 972
 973                                 if (r < 0)
 974                                         return r;
 975                         } else if (r != -ENODATA)
 976                                 return r;
 977                 }
 978         }
 979
 980         operstate_str = link_operstate_to_string(operstate);
 981         assert(operstate_str);
 982
 983         r = fopen_temporary(m->state_file, &f, &temp_path);
 984         if (r < 0)
 985                 return r;
 986
 987         (void) fchmod(fileno(f), 0644);
 988
 989         fprintf(f,
 990                 "# This is private data. Do not parse.\n"
 991                 "OPER_STATE=%s\n", operstate_str);
 992
 993         print_string_set(f, "DNS=", dns);
 994         print_string_set(f, "NTP=", ntp);
 995         print_string_set(f, "DOMAINS=", search_domains);
 996         print_string_set(f, "ROUTE_DOMAINS=", route_domains);
 997
 998         r = fflush_and_check(f);
 999         if (r < 0)
1000                 goto fail;
1001
1002         if (rename(temp_path, m->state_file) < 0) {
1003                 r = -errno;
1004                 goto fail;
1005         }
1006
1007         if (m->operational_state != operstate) {
1008                 m->operational_state = operstate;
1009                 r = manager_send_changed(m, "OperationalState", NULL);
1010                 if (r < 0)
1011                         log_error_errno(r, "Could not emit changed OperationalState: %m");
1012         }
1013
1014         m->dirty = false;
1015
1016         return 0;
1017
1018 fail:
1019         (void) unlink(m->state_file);
1020         (void) unlink(temp_path);
1021
1022         return log_error_errno(r, "Failed to save network state to %s: %m", m->state_file);
1023 }
1024
1025 static int manager_dirty_handler(sd_event_source *s, void *userdata) {
1026         Manager *m = userdata;
1027         Link *link;
1028         Iterator i;
1029         int r;
1030
1031         assert(m);
1032
1033         if (m->dirty)
1034                 manager_save(m);
1035
1036         SET_FOREACH(link, m->dirty_links, i) {
1037                 r = link_save(link);
1038                 if (r >= 0)
1039                         link_clean(link);
1040         }
1041
1042         return 1;
1043 }
1044
1045 int manager_new(Manager **ret) {
1046         _cleanup_manager_free_ Manager *m = NULL;
1047         int r;
1048
1049         m = new0(Manager, 1);
1050         if (!m)
1051                 return -ENOMEM;
1052
1053         m->state_file = strdup("/run/systemd/netif/state");
1054         if (!m->state_file)
1055                 return -ENOMEM;
1056
1057         r = sd_event_default(&m->event);
1058         if (r < 0)
1059                 return r;
1060
1061         sd_event_set_watchdog(m->event, true);
1062
1063         sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL);
1064         sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);
1065
1066         r = sd_event_add_post(m->event, NULL, manager_dirty_handler, m);
1067         if (r < 0)
1068                 return r;
1069
1070         r = manager_connect_rtnl(m);
1071         if (r < 0)
1072                 return r;
1073
1074         r = manager_connect_udev(m);
1075         if (r < 0)
1076                 return r;
1077
1078         m->netdevs = hashmap_new(&string_hash_ops);
1079         if (!m->netdevs)
1080                 return -ENOMEM;
1081
1082         LIST_HEAD_INIT(m->networks);
1083
1084         r = setup_default_address_pool(m);
1085         if (r < 0)
1086                 return r;
1087
1088         m->duid.type = DUID_TYPE_EN;
1089
1090         *ret = m;
1091         m = NULL;
1092
1093         return 0;
1094 }
1095
1096 void manager_free(Manager *m) {
1097         Network *network;
1098         NetDev *netdev;
1099         Link *link;
1100         AddressPool *pool;
1101
1102         if (!m)
1103                 return;
1104
1105         free(m->state_file);
1106
1107         while ((link = hashmap_first(m->links)))
1108                 link_unref(link);
1109         hashmap_free(m->links);
1110
1111         while ((network = m->networks))
1112                 network_free(network);
1113
1114         hashmap_free(m->networks_by_name);
1115
1116         while ((netdev = hashmap_first(m->netdevs)))
1117                 netdev_unref(netdev);
1118         hashmap_free(m->netdevs);
1119
1120         while ((pool = m->address_pools))
1121                 address_pool_free(pool);
1122
1123         sd_netlink_unref(m->rtnl);
1124         sd_event_unref(m->event);
1125
1126         sd_event_source_unref(m->udev_event_source);
1127         udev_monitor_unref(m->udev_monitor);
1128         udev_unref(m->udev);
1129
1130         sd_bus_unref(m->bus);
1131         sd_bus_slot_unref(m->prepare_for_sleep_slot);
1132         sd_event_source_unref(m->bus_retry_event_source);
1133
1134         free(m->dynamic_timezone);
1135         free(m->dynamic_hostname);
1136
1137         free(m);
1138 }
1139
1140 static bool manager_check_idle(void *userdata) {
1141         Manager *m = userdata;
1142         Link *link;
1143         Iterator i;
1144
1145         assert(m);
1146
1147         /* Check whether we are idle now. The only case when we decide to be idle is when there's only a loopback
1148          * device around, for which we have no configuration, and which already left the PENDING state. In all other
1149          * cases we are not idle. */
1150
1151         HASHMAP_FOREACH(link, m->links, i) {
1152                 /* We are not woken on udev activity, so let's just wait for the pending udev event */
1153                 if (link->state == LINK_STATE_PENDING)
1154                         return false;
1155
1156                 if ((link->flags & IFF_LOOPBACK) == 0)
1157                         return false;
1158
1159                 if (link->network)
1160                         return false;
1161         }
1162
1163         return true;
1164 }
1165
1166 int manager_run(Manager *m) {
1167         Link *link;
1168         Iterator i;
1169
1170         assert(m);
1171
1172         /* The dirty handler will deal with future serialization, but the first one
1173            must be done explicitly. */
1174
1175         manager_save(m);
1176
1177         HASHMAP_FOREACH(link, m->links, i)
1178                 link_save(link);
1179
1180         if (m->bus)
1181                 return bus_event_loop_with_idle(
1182                                 m->event,
1183                                 m->bus,
1184                                 "org.freedesktop.network1",
1185                                 DEFAULT_EXIT_USEC,
1186                                 manager_check_idle,
1187                                 m);
1188         else
1189                 /* failed to connect to the bus, so we lose exit-on-idle logic,
1190                    this should not happen except if dbus is not around at all */
1191                 return sd_event_loop(m->event);
1192 }
1193
1194 int manager_load_config(Manager *m) {
1195         int r;
1196
1197         /* update timestamp */
1198         paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, true);
1199
1200         r = netdev_load(m);
1201         if (r < 0)
1202                 return r;
1203
1204         r = network_load(m);
1205         if (r < 0)
1206                 return r;
1207
1208         return 0;
1209 }
1210
1211 bool manager_should_reload(Manager *m) {
1212         return paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, false);
1213 }
1214
1215 int manager_rtnl_enumerate_links(Manager *m) {
1216         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1217         sd_netlink_message *link;
1218         int r;
1219
1220         assert(m);
1221         assert(m->rtnl);
1222
1223         r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);
1224         if (r < 0)
1225                 return r;
1226
1227         r = sd_netlink_message_request_dump(req, true);
1228         if (r < 0)
1229                 return r;
1230
1231         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1232         if (r < 0)
1233                 return r;
1234
1235         for (link = reply; link; link = sd_netlink_message_next(link)) {
1236                 int k;
1237
1238                 m->enumerating = true;
1239
1240                 k = manager_rtnl_process_link(m->rtnl, link, m);
1241                 if (k < 0)
1242                         r = k;
1243
1244                 m->enumerating = false;
1245         }
1246
1247         return r;
1248 }
1249
1250 int manager_rtnl_enumerate_addresses(Manager *m) {
1251         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1252         sd_netlink_message *addr;
1253         int r;
1254
1255         assert(m);
1256         assert(m->rtnl);
1257
1258         r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, 0);
1259         if (r < 0)
1260                 return r;
1261
1262         r = sd_netlink_message_request_dump(req, true);
1263         if (r < 0)
1264                 return r;
1265
1266         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1267         if (r < 0)
1268                 return r;
1269
1270         for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
1271                 int k;
1272
1273                 m->enumerating = true;
1274
1275                 k = manager_rtnl_process_address(m->rtnl, addr, m);
1276                 if (k < 0)
1277                         r = k;
1278
1279                 m->enumerating = false;
1280         }
1281
1282         return r;
1283 }
1284
1285 int manager_rtnl_enumerate_routes(Manager *m) {
1286         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1287         sd_netlink_message *route;
1288         int r;
1289
1290         assert(m);
1291         assert(m->rtnl);
1292
1293         r = sd_rtnl_message_new_route(m->rtnl, &req, RTM_GETROUTE, 0, 0);
1294         if (r < 0)
1295                 return r;
1296
1297         r = sd_netlink_message_request_dump(req, true);
1298         if (r < 0)
1299                 return r;
1300
1301         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1302         if (r < 0)
1303                 return r;
1304
1305         for (route = reply; route; route = sd_netlink_message_next(route)) {
1306                 int k;
1307
1308                 m->enumerating = true;
1309
1310                 k = manager_rtnl_process_route(m->rtnl, route, m);
1311                 if (k < 0)
1312                         r = k;
1313
1314                 m->enumerating = false;
1315         }
1316
1317         return r;
1318 }
1319
1320 int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, union in_addr_union *found) {
1321         AddressPool *p;
1322         int r;
1323
1324         assert(m);
1325         assert(prefixlen > 0);
1326         assert(found);
1327
1328         LIST_FOREACH(address_pools, p, m->address_pools) {
1329                 if (p->family != family)
1330                         continue;
1331
1332                 r = address_pool_acquire(p, prefixlen, found);
1333                 if (r != 0)
1334                         return r;
1335         }
1336
1337         return 0;
1338 }
1339
1340 Link* manager_find_uplink(Manager *m, Link *exclude) {
1341         _cleanup_free_ struct local_address *gateways = NULL;
1342         int n, i;
1343
1344         assert(m);
1345
1346         /* Looks for a suitable "uplink", via black magic: an
1347          * interface that is up and where the default route with the
1348          * highest priority points to. */
1349
1350         n = local_gateways(m->rtnl, 0, AF_UNSPEC, &gateways);
1351         if (n < 0) {
1352                 log_warning_errno(n, "Failed to determine list of default gateways: %m");
1353                 return NULL;
1354         }
1355
1356         for (i = 0; i < n; i++) {
1357                 Link *link;
1358
1359                 link = hashmap_get(m->links, INT_TO_PTR(gateways[i].ifindex));
1360                 if (!link) {
1361                         log_debug("Weird, found a gateway for a link we don't know. Ignoring.");
1362                         continue;
1363                 }
1364
1365                 if (link == exclude)
1366                         continue;
1367
1368                 if (link->operstate < LINK_OPERSTATE_ROUTABLE)
1369                         continue;
1370
1371                 return link;
1372         }
1373
1374         return NULL;
1375 }
1376
1377 void manager_dirty(Manager *manager) {
1378         assert(manager);
1379
1380         /* the serialized state in /run is no longer up-to-date */
1381         manager->dirty = true;
1382 }
1383
1384 static int set_hostname_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
1385         Manager *manager = userdata;
1386         const sd_bus_error *e;
1387
1388         assert(m);
1389         assert(manager);
1390
1391         e = sd_bus_message_get_error(m);
1392         if (e)
1393                 log_warning_errno(sd_bus_error_get_errno(e), "Could not set hostname: %s", e->message);
1394
1395         return 1;
1396 }
1397
1398 int manager_set_hostname(Manager *m, const char *hostname) {
1399         int r;
1400
1401         log_debug("Setting transient hostname: '%s'", strna(hostname));
1402         if (free_and_strdup(&m->dynamic_hostname, hostname) < 0)
1403                 return log_oom();
1404
1405         if (!m->bus) {
1406                 /* TODO: replace by assert when we can rely on kdbus */
1407                 log_info("Not connected to system bus, ignoring transient hostname.");
1408                 return 0;
1409         }
1410
1411         r = sd_bus_call_method_async(
1412                         m->bus,
1413                         NULL,
1414                         "org.freedesktop.hostname1",
1415                         "/org/freedesktop/hostname1",
1416                         "org.freedesktop.hostname1",
1417                         "SetHostname",
1418                         set_hostname_handler,
1419                         m,
1420                         "sb",
1421                         hostname,
1422                         false);
1423
1424         if (r < 0)
1425                 return log_error_errno(r, "Could not set transient hostname: %m");
1426
1427         return 0;
1428 }
1429
1430 static int set_timezone_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
1431         Manager *manager = userdata;
1432         const sd_bus_error *e;
1433
1434         assert(m);
1435         assert(manager);
1436
1437         e = sd_bus_message_get_error(m);
1438         if (e)
1439                 log_warning_errno(sd_bus_error_get_errno(e), "Could not set timezone: %s", e->message);
1440
1441         return 1;
1442 }
1443
1444 int manager_set_timezone(Manager *m, const char *tz) {
1445         int r;
1446
1447         assert(m);
1448         assert(tz);
1449
1450         log_debug("Setting system timezone: '%s'", tz);
1451         if (free_and_strdup(&m->dynamic_timezone, tz) < 0)
1452                 return log_oom();
1453
1454         if (!m->bus) {
1455                 log_info("Not connected to system bus, ignoring timezone.");
1456                 return 0;
1457         }
1458
1459         r = sd_bus_call_method_async(
1460                         m->bus,
1461                         NULL,
1462                         "org.freedesktop.timedate1",
1463                         "/org/freedesktop/timedate1",
1464                         "org.freedesktop.timedate1",
1465                         "SetTimezone",
1466                         set_timezone_handler,
1467                         m,
1468                         "sb",
1469                         tz,
1470                         false);
1471         if (r < 0)
1472                 return log_error_errno(r, "Could not set timezone: %m");
1473
1474         return 0;
1475 }