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 #include <linux/fib_rules.h>
  23
  24 #include "sd-daemon.h"
  25 #include "sd-netlink.h"
  26
  27 #include "alloc-util.h"
  28 #include "bus-util.h"
  29 #include "conf-parser.h"
  30 #include "def.h"
  31 #include "dns-domain.h"
  32 #include "fd-util.h"
  33 #include "fileio.h"
  34 #include "libudev-private.h"
  35 #include "local-addresses.h"
  36 #include "netlink-util.h"
  37 #include "networkd-manager.h"
  38 #include "ordered-set.h"
  39 #include "path-util.h"
  40 #include "set.h"
  41 #include "udev-util.h"
  42 #include "virt.h"
  43
  44 /* use 8 MB for receive socket kernel queue. */
  45 #define RCVBUF_SIZE    (8*1024*1024)
  46
  47 const char* const network_dirs[] = {
  48         "/etc/systemd/network",
  49         "/run/systemd/network",
  50         "/usr/lib/systemd/network",
  51 #ifdef HAVE_SPLIT_USR
  52         "/lib/systemd/network",
  53 #endif
  54         NULL};
  55
  56 static int setup_default_address_pool(Manager *m) {
  57         AddressPool *p;
  58         int r;
  59
  60         assert(m);
  61
  62         /* Add in the well-known private address ranges. */
  63
  64         r = address_pool_new_from_string(m, &p, AF_INET6, "fc00::", 7);
  65         if (r < 0)
  66                 return r;
  67
  68         r = address_pool_new_from_string(m, &p, AF_INET, "192.168.0.0", 16);
  69         if (r < 0)
  70                 return r;
  71
  72         r = address_pool_new_from_string(m, &p, AF_INET, "172.16.0.0", 12);
  73         if (r < 0)
  74                 return r;
  75
  76         r = address_pool_new_from_string(m, &p, AF_INET, "10.0.0.0", 8);
  77         if (r < 0)
  78                 return r;
  79
  80         return 0;
  81 }
  82
  83 static int on_bus_retry(sd_event_source *s, usec_t usec, void *userdata) {
  84         Manager *m = userdata;
  85
  86         assert(s);
  87         assert(m);
  88
  89         m->bus_retry_event_source = sd_event_source_unref(m->bus_retry_event_source);
  90
  91         manager_connect_bus(m);
  92
  93         return 0;
  94 }
  95
  96 static int manager_reset_all(Manager *m) {
  97         Link *link;
  98         Iterator i;
  99         int r;
 100
 101         assert(m);
 102
 103         HASHMAP_FOREACH(link, m->links, i) {
 104                 r = link_carrier_reset(link);
 105                 if (r < 0)
 106                         log_link_warning_errno(link, r, "Could not reset carrier: %m");
 107         }
 108
 109         return 0;
 110 }
 111
 112 static int match_prepare_for_sleep(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
 113         Manager *m = userdata;
 114         int b, r;
 115
 116         assert(message);
 117
 118         r = sd_bus_message_read(message, "b", &b);
 119         if (r < 0) {
 120                 log_debug_errno(r, "Failed to parse PrepareForSleep signal: %m");
 121                 return 0;
 122         }
 123
 124         if (b)
 125                 return 0;
 126
 127         log_debug("Coming back from suspend, resetting all connections...");
 128
 129         manager_reset_all(m);
 130
 131         return 0;
 132 }
 133
 134 int manager_connect_bus(Manager *m) {
 135         int r;
 136
 137         assert(m);
 138
 139         r = sd_bus_default_system(&m->bus);
 140         if (r < 0) {
 141                 /* We failed to connect? Yuck, we must be in early
 142                  * boot. Let's try in 5s again. */
 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, rt_type;
 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_type(message, &rt_type);
 445         if (r < 0) {
 446                 log_link_warning_errno(link, r, "rtnl: received route with invalid type, ignoring: %m");
 447                 return 0;
 448         }
 449
 450         r = sd_rtnl_message_route_get_table(message, &table);
 451         if (r < 0) {
 452                 log_link_warning_errno(link, r, "rtnl: received route with invalid table, ignoring: %m");
 453                 return 0;
 454         }
 455
 456         r = sd_netlink_message_read_u32(message, RTA_PRIORITY, &priority);
 457         if (r < 0 && r != -ENODATA) {
 458                 log_link_warning_errno(link, r, "rtnl: received route with invalid priority, ignoring: %m");
 459                 return 0;
 460         }
 461
 462         route_get(link, family, &dst, dst_prefixlen, tos, priority, table, &route);
 463
 464         switch (type) {
 465         case RTM_NEWROUTE:
 466                 if (!route) {
 467                         /* A route appeared that we did not request */
 468                         r = route_add_foreign(link, family, &dst, dst_prefixlen, tos, priority, table, &route);
 469                         if (r < 0)
 470                                 return 0;
 471                 }
 472
 473                 route_update(route, &src, src_prefixlen, &gw, &prefsrc, scope, rt_type, protocol);
 474
 475                 break;
 476
 477         case RTM_DELROUTE:
 478                 route_free(route);
 479                 break;
 480
 481         default:
 482                 assert_not_reached("Received invalid RTNL message type");
 483         }
 484
 485         return 1;
 486 }
 487
 488 int manager_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 489         Manager *m = userdata;
 490         Link *link = NULL;
 491         uint16_t type;
 492         unsigned char flags;
 493         int family;
 494         unsigned char prefixlen;
 495         unsigned char scope;
 496         union in_addr_union in_addr;
 497         struct ifa_cacheinfo cinfo;
 498         Address *address = NULL;
 499         char buf[INET6_ADDRSTRLEN], valid_buf[FORMAT_TIMESPAN_MAX];
 500         const char *valid_str = NULL;
 501         int r, ifindex;
 502
 503         assert(rtnl);
 504         assert(message);
 505         assert(m);
 506
 507         if (sd_netlink_message_is_error(message)) {
 508                 r = sd_netlink_message_get_errno(message);
 509                 if (r < 0)
 510                         log_warning_errno(r, "rtnl: failed to receive address: %m");
 511
 512                 return 0;
 513         }
 514
 515         r = sd_netlink_message_get_type(message, &type);
 516         if (r < 0) {
 517                 log_warning_errno(r, "rtnl: could not get message type: %m");
 518                 return 0;
 519         } else if (type != RTM_NEWADDR && type != RTM_DELADDR) {
 520                 log_warning("rtnl: received unexpected message type when processing address");
 521                 return 0;
 522         }
 523
 524         r = sd_rtnl_message_addr_get_ifindex(message, &ifindex);
 525         if (r < 0) {
 526                 log_warning_errno(r, "rtnl: could not get ifindex from address: %m");
 527                 return 0;
 528         } else if (ifindex <= 0) {
 529                 log_warning("rtnl: received address message with invalid ifindex: %d", ifindex);
 530                 return 0;
 531         } else {
 532                 r = link_get(m, ifindex, &link);
 533                 if (r < 0 || !link) {
 534                         /* when enumerating we might be out of sync, but we will
 535                          * get the address again, so just ignore it */
 536                         if (!m->enumerating)
 537                                 log_warning("rtnl: received address for nonexistent link (%d), ignoring", ifindex);
 538                         return 0;
 539                 }
 540         }
 541
 542         r = sd_rtnl_message_addr_get_family(message, &family);
 543         if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) {
 544                 log_link_warning(link, "rtnl: received address with invalid family, ignoring.");
 545                 return 0;
 546         }
 547
 548         r = sd_rtnl_message_addr_get_prefixlen(message, &prefixlen);
 549         if (r < 0) {
 550                 log_link_warning_errno(link, r, "rtnl: received address with invalid prefixlen, ignoring: %m");
 551                 return 0;
 552         }
 553
 554         r = sd_rtnl_message_addr_get_scope(message, &scope);
 555         if (r < 0) {
 556                 log_link_warning_errno(link, r, "rtnl: received address with invalid scope, ignoring: %m");
 557                 return 0;
 558         }
 559
 560         r = sd_rtnl_message_addr_get_flags(message, &flags);
 561         if (r < 0) {
 562                 log_link_warning_errno(link, r, "rtnl: received address with invalid flags, ignoring: %m");
 563                 return 0;
 564         }
 565
 566         switch (family) {
 567         case AF_INET:
 568                 r = sd_netlink_message_read_in_addr(message, IFA_LOCAL, &in_addr.in);
 569                 if (r < 0) {
 570                         log_link_warning_errno(link, r, "rtnl: received address without valid address, ignoring: %m");
 571                         return 0;
 572                 }
 573
 574                 break;
 575
 576         case AF_INET6:
 577                 r = sd_netlink_message_read_in6_addr(message, IFA_ADDRESS, &in_addr.in6);
 578                 if (r < 0) {
 579                         log_link_warning_errno(link, r, "rtnl: received address without valid address, ignoring: %m");
 580                         return 0;
 581                 }
 582
 583                 break;
 584
 585         default:
 586                 log_link_debug(link, "rtnl: ignoring unsupported address family: %d", family);
 587         }
 588
 589         if (!inet_ntop(family, &in_addr, buf, INET6_ADDRSTRLEN)) {
 590                 log_link_warning(link, "Could not print address");
 591                 return 0;
 592         }
 593
 594         r = sd_netlink_message_read_cache_info(message, IFA_CACHEINFO, &cinfo);
 595         if (r >= 0) {
 596                 if (cinfo.ifa_valid != CACHE_INFO_INFINITY_LIFE_TIME)
 597                         valid_str = format_timespan(valid_buf, FORMAT_TIMESPAN_MAX,
 598                                                     cinfo.ifa_valid * USEC_PER_SEC,
 599                                                     USEC_PER_SEC);
 600         }
 601
 602         address_get(link, family, &in_addr, prefixlen, &address);
 603
 604         switch (type) {
 605         case RTM_NEWADDR:
 606                 if (address)
 607                         log_link_debug(link, "Updating address: %s/%u (valid %s%s)", buf, prefixlen,
 608                                        valid_str ? "for " : "forever", valid_str ?: "");
 609                 else {
 610                         /* An address appeared that we did not request */
 611                         r = address_add_foreign(link, family, &in_addr, prefixlen, &address);
 612                         if (r < 0) {
 613                                 log_link_warning_errno(link, r, "Failed to add address %s/%u: %m", buf, prefixlen);
 614                                 return 0;
 615                         } else
 616                                 log_link_debug(link, "Adding address: %s/%u (valid %s%s)", buf, prefixlen,
 617                                                valid_str ? "for " : "forever", valid_str ?: "");
 618                 }
 619
 620                 address_update(address, flags, scope, &cinfo);
 621
 622                 break;
 623
 624         case RTM_DELADDR:
 625
 626                 if (address) {
 627                         log_link_debug(link, "Removing address: %s/%u (valid %s%s)", buf, prefixlen,
 628                                        valid_str ? "for " : "forever", valid_str ?: "");
 629                         address_drop(address);
 630                 } else
 631                         log_link_warning(link, "Removing non-existent address: %s/%u (valid %s%s)", buf, prefixlen,
 632                                          valid_str ? "for " : "forever", valid_str ?: "");
 633
 634                 break;
 635         default:
 636                 assert_not_reached("Received invalid RTNL message type");
 637         }
 638
 639         return 1;
 640 }
 641
 642 static int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 643         Manager *m = userdata;
 644         Link *link = NULL;
 645         NetDev *netdev = NULL;
 646         uint16_t type;
 647         const char *name;
 648         int r, ifindex;
 649
 650         assert(rtnl);
 651         assert(message);
 652         assert(m);
 653
 654         if (sd_netlink_message_is_error(message)) {
 655                 r = sd_netlink_message_get_errno(message);
 656                 if (r < 0)
 657                         log_warning_errno(r, "rtnl: Could not receive link: %m");
 658
 659                 return 0;
 660         }
 661
 662         r = sd_netlink_message_get_type(message, &type);
 663         if (r < 0) {
 664                 log_warning_errno(r, "rtnl: Could not get message type: %m");
 665                 return 0;
 666         } else if (type != RTM_NEWLINK && type != RTM_DELLINK) {
 667                 log_warning("rtnl: Received unexpected message type when processing link");
 668                 return 0;
 669         }
 670
 671         r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
 672         if (r < 0) {
 673                 log_warning_errno(r, "rtnl: Could not get ifindex from link: %m");
 674                 return 0;
 675         } else if (ifindex <= 0) {
 676                 log_warning("rtnl: received link message with invalid ifindex: %d", ifindex);
 677                 return 0;
 678         }
 679
 680         r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
 681         if (r < 0) {
 682                 log_warning_errno(r, "rtnl: Received link message without ifname: %m");
 683                 return 0;
 684         }
 685
 686         (void) link_get(m, ifindex, &link);
 687         (void) netdev_get(m, name, &netdev);
 688
 689         switch (type) {
 690         case RTM_NEWLINK:
 691                 if (!link) {
 692                         /* link is new, so add it */
 693                         r = link_add(m, message, &link);
 694                         if (r < 0) {
 695                                 log_warning_errno(r, "Could not add new link: %m");
 696                                 return 0;
 697                         }
 698                 }
 699
 700                 if (netdev) {
 701                         /* netdev exists, so make sure the ifindex matches */
 702                         r = netdev_set_ifindex(netdev, message);
 703                         if (r < 0) {
 704                                 log_warning_errno(r, "Could not set ifindex on netdev: %m");
 705                                 return 0;
 706                         }
 707                 }
 708
 709                 r = link_update(link, message);
 710                 if (r < 0)
 711                         return 0;
 712
 713                 break;
 714
 715         case RTM_DELLINK:
 716                 link_drop(link);
 717                 netdev_drop(netdev);
 718
 719                 break;
 720
 721         default:
 722                 assert_not_reached("Received invalid RTNL message type.");
 723         }
 724
 725         return 1;
 726 }
 727
 728 int manager_rtnl_process_rule(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
 729         uint8_t tos = 0, to_prefixlen = 0, from_prefixlen = 0;
 730         RoutingPolicyRule *rule = NULL;
 731         union in_addr_union to, from;
 732         uint32_t fwmark = 0, table = 0;
 733         Manager *m = userdata;
 734         uint16_t type;
 735         int family;
 736         int r;
 737
 738         assert(rtnl);
 739         assert(message);
 740         assert(m);
 741
 742         if (sd_netlink_message_is_error(message)) {
 743                 r = sd_netlink_message_get_errno(message);
 744                 if (r < 0)
 745                         log_warning_errno(r, "rtnl: failed to receive rule: %m");
 746
 747                 return 0;
 748         }
 749
 750         r = sd_netlink_message_get_type(message, &type);
 751         if (r < 0) {
 752                 log_warning_errno(r, "rtnl: could not get message type: %m");
 753                 return 0;
 754         } else if (!IN_SET(type, RTM_NEWRULE, RTM_DELRULE)) {
 755                 log_warning("rtnl: received unexpected message type '%u' when processing rule.", type);
 756                 return 0;
 757         }
 758
 759         r = sd_rtnl_message_get_family(message, &family);
 760         if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) {
 761                 log_warning_errno(r, "rtnl: received address with invalid family type %u, ignoring.", type);
 762                 return 0;
 763         }
 764
 765         switch (family) {
 766         case AF_INET:
 767                 r = sd_netlink_message_read_in_addr(message, FRA_SRC, &from.in);
 768                 if (r >= 0) {
 769                         r = sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(message, &from_prefixlen);
 770                         if (r < 0)
 771                                 log_warning_errno(r, "rtnl: failed to retrive rule from prefix length: %m");
 772                 }
 773
 774                 r = sd_netlink_message_read_in_addr(message, FRA_DST, &to.in);
 775                 if (r >= 0) {
 776                         r = sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(message, &to_prefixlen);
 777                         if (r < 0)
 778                                 log_warning_errno(r, "rtnl: failed to retrive rule to prefix length: %m");
 779                 }
 780
 781                 break;
 782
 783         case AF_INET6:
 784                 r = sd_netlink_message_read_in6_addr(message, FRA_SRC, &from.in6);
 785                 if (r >= 0) {
 786                         r = sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(message, &from_prefixlen);
 787                         if (r < 0)
 788                                 log_warning_errno(r, "rtnl: failed to retrive rule from prefix length: %m");
 789                 }
 790
 791                 r = sd_netlink_message_read_in6_addr(message, FRA_DST, &to.in6);
 792                 if (r >= 0) {
 793                         r = sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(message, &to_prefixlen);
 794                         if (r < 0)
 795                                 log_warning_errno(r, "rtnl: failed to retrive rule to prefix length: %m");
 796                 }
 797
 798                 break;
 799
 800         default:
 801                 log_debug("rtnl: ignoring unsupported rule family: %d", family);
 802         }
 803
 804         if (from_prefixlen == 0 && to_prefixlen == 0)
 805                 return 0;
 806
 807         (void) sd_netlink_message_read_u32(message, FRA_FWMARK, &fwmark);
 808         (void) sd_netlink_message_read_u32(message, FRA_TABLE, &table);
 809         (void) sd_rtnl_message_routing_policy_rule_get_tos(message, &tos);
 810
 811         (void) routing_policy_rule_get(m, family, &from, from_prefixlen, &to, to_prefixlen, tos, fwmark, table, &rule);
 812
 813         switch (type) {
 814         case RTM_NEWRULE:
 815                 if(!rule) {
 816                         r = routing_policy_rule_add_foreign(m, family, &from, from_prefixlen, &to, to_prefixlen, tos, fwmark, table, &rule);
 817                         if (r < 0) {
 818                                 log_warning_errno(r, "Could not add rule: %m");
 819                                 return 0;
 820                         }
 821                 }
 822                 break;
 823         case RTM_DELRULE:
 824                 routing_policy_rule_free(rule);
 825
 826                 break;
 827
 828         default:
 829                 assert_not_reached("Received invalid RTNL message type");
 830         }
 831
 832         return 1;
 833 }
 834
 835 static int systemd_netlink_fd(void) {
 836         int n, fd, rtnl_fd = -EINVAL;
 837
 838         n = sd_listen_fds(true);
 839         if (n <= 0)
 840                 return -EINVAL;
 841
 842         for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++) {
 843                 if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) {
 844                         if (rtnl_fd >= 0)
 845                                 return -EINVAL;
 846
 847                         rtnl_fd = fd;
 848                 }
 849         }
 850
 851         return rtnl_fd;
 852 }
 853
 854 static int manager_connect_rtnl(Manager *m) {
 855         int fd, r;
 856
 857         assert(m);
 858
 859         fd = systemd_netlink_fd();
 860         if (fd < 0)
 861                 r = sd_netlink_open(&m->rtnl);
 862         else
 863                 r = sd_netlink_open_fd(&m->rtnl, fd);
 864         if (r < 0)
 865                 return r;
 866
 867         r = sd_netlink_inc_rcvbuf(m->rtnl, RCVBUF_SIZE);
 868         if (r < 0)
 869                 return r;
 870
 871         r = sd_netlink_attach_event(m->rtnl, m->event, 0);
 872         if (r < 0)
 873                 return r;
 874
 875         r = sd_netlink_add_match(m->rtnl, RTM_NEWLINK, &manager_rtnl_process_link, m);
 876         if (r < 0)
 877                 return r;
 878
 879         r = sd_netlink_add_match(m->rtnl, RTM_DELLINK, &manager_rtnl_process_link, m);
 880         if (r < 0)
 881                 return r;
 882
 883         r = sd_netlink_add_match(m->rtnl, RTM_NEWADDR, &manager_rtnl_process_address, m);
 884         if (r < 0)
 885                 return r;
 886
 887         r = sd_netlink_add_match(m->rtnl, RTM_DELADDR, &manager_rtnl_process_address, m);
 888         if (r < 0)
 889                 return r;
 890
 891         r = sd_netlink_add_match(m->rtnl, RTM_NEWROUTE, &manager_rtnl_process_route, m);
 892         if (r < 0)
 893                 return r;
 894
 895         r = sd_netlink_add_match(m->rtnl, RTM_DELROUTE, &manager_rtnl_process_route, m);
 896         if (r < 0)
 897                 return r;
 898
 899         r = sd_netlink_add_match(m->rtnl, RTM_NEWRULE, &manager_rtnl_process_rule, m);
 900         if (r < 0)
 901                 return r;
 902
 903         r = sd_netlink_add_match(m->rtnl, RTM_DELRULE, &manager_rtnl_process_rule, m);
 904         if (r < 0)
 905                 return r;
 906
 907         return 0;
 908 }
 909
 910 static int ordered_set_put_in_addr_data(OrderedSet *s, const struct in_addr_data *address) {
 911         char *p;
 912         int r;
 913
 914         assert(s);
 915         assert(address);
 916
 917         r = in_addr_to_string(address->family, &address->address, &p);
 918         if (r < 0)
 919                 return r;
 920
 921         r = ordered_set_consume(s, p);
 922         if (r == -EEXIST)
 923                 return 0;
 924
 925         return r;
 926 }
 927
 928 static int ordered_set_put_in_addr_datav(OrderedSet *s, const struct in_addr_data *addresses, unsigned n) {
 929         int r, c = 0;
 930         unsigned i;
 931
 932         assert(s);
 933         assert(addresses || n == 0);
 934
 935         for (i = 0; i < n; i++) {
 936                 r = ordered_set_put_in_addr_data(s, addresses+i);
 937                 if (r < 0)
 938                         return r;
 939
 940                 c += r;
 941         }
 942
 943         return c;
 944 }
 945
 946 static int ordered_set_put_in4_addr(OrderedSet *s, const struct in_addr *address) {
 947         char *p;
 948         int r;
 949
 950         assert(s);
 951         assert(address);
 952
 953         r = in_addr_to_string(AF_INET, (const union in_addr_union*) address, &p);
 954         if (r < 0)
 955                 return r;
 956
 957         r = ordered_set_consume(s, p);
 958         if (r == -EEXIST)
 959                 return 0;
 960
 961         return r;
 962 }
 963
 964 static int ordered_set_put_in4_addrv(OrderedSet *s, const struct in_addr *addresses, unsigned n) {
 965         int r, c = 0;
 966         unsigned i;
 967
 968         assert(s);
 969         assert(n == 0 || addresses);
 970
 971         for (i = 0; i < n; i++) {
 972                 r = ordered_set_put_in4_addr(s, addresses+i);
 973                 if (r < 0)
 974                         return r;
 975
 976                 c += r;
 977         }
 978
 979         return c;
 980 }
 981
 982 static void print_string_set(FILE *f, const char *field, OrderedSet *s) {
 983         bool space = false;
 984         Iterator i;
 985         char *p;
 986
 987         if (ordered_set_isempty(s))
 988                 return;
 989
 990         fputs_unlocked(field, f);
 991
 992         ORDERED_SET_FOREACH(p, s, i)
 993                 fputs_with_space(f, p, NULL, &space);
 994
 995         fputc_unlocked('\n', f);
 996 }
 997
 998 static int manager_save(Manager *m) {
 999         _cleanup_ordered_set_free_free_ OrderedSet *dns = NULL, *ntp = NULL, *search_domains = NULL, *route_domains = NULL;
1000         RoutingPolicyRule *rule = NULL;
1001         bool space = false;
1002         Link *link;
1003         Iterator i;
1004         _cleanup_free_ char *temp_path = NULL;
1005         _cleanup_fclose_ FILE *f = NULL;
1006         LinkOperationalState operstate = LINK_OPERSTATE_OFF;
1007         const char *operstate_str;
1008         int r;
1009
1010         assert(m);
1011         assert(m->state_file);
1012
1013         /* We add all NTP and DNS server to a set, to filter out duplicates */
1014         dns = ordered_set_new(&string_hash_ops);
1015         if (!dns)
1016                 return -ENOMEM;
1017
1018         ntp = ordered_set_new(&string_hash_ops);
1019         if (!ntp)
1020                 return -ENOMEM;
1021
1022         search_domains = ordered_set_new(&dns_name_hash_ops);
1023         if (!search_domains)
1024                 return -ENOMEM;
1025
1026         route_domains = ordered_set_new(&dns_name_hash_ops);
1027         if (!route_domains)
1028                 return -ENOMEM;
1029
1030         HASHMAP_FOREACH(link, m->links, i) {
1031                 if (link->flags & IFF_LOOPBACK)
1032                         continue;
1033
1034                 if (link->operstate > operstate)
1035                         operstate = link->operstate;
1036
1037                 if (!link->network)
1038                         continue;
1039
1040                 /* First add the static configured entries */
1041                 r = ordered_set_put_in_addr_datav(dns, link->network->dns, link->network->n_dns);
1042                 if (r < 0)
1043                         return r;
1044
1045                 r = ordered_set_put_strdupv(ntp, link->network->ntp);
1046                 if (r < 0)
1047                         return r;
1048
1049                 r = ordered_set_put_strdupv(search_domains, link->network->search_domains);
1050                 if (r < 0)
1051                         return r;
1052
1053                 r = ordered_set_put_strdupv(route_domains, link->network->route_domains);
1054                 if (r < 0)
1055                         return r;
1056
1057                 if (!link->dhcp_lease)
1058                         continue;
1059
1060                 /* Secondly, add the entries acquired via DHCP */
1061                 if (link->network->dhcp_use_dns) {
1062                         const struct in_addr *addresses;
1063
1064                         r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
1065                         if (r > 0) {
1066                                 r = ordered_set_put_in4_addrv(dns, addresses, r);
1067                                 if (r < 0)
1068                                         return r;
1069                         } else if (r < 0 && r != -ENODATA)
1070                                 return r;
1071                 }
1072
1073                 if (link->network->dhcp_use_ntp) {
1074                         const struct in_addr *addresses;
1075
1076                         r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
1077                         if (r > 0) {
1078                                 r = ordered_set_put_in4_addrv(ntp, addresses, r);
1079                                 if (r < 0)
1080                                         return r;
1081                         } else if (r < 0 && r != -ENODATA)
1082                                 return r;
1083                 }
1084
1085                 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
1086                         const char *domainname;
1087                         char **domains = NULL;
1088
1089                         OrderedSet *target_domains = (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) ? search_domains : route_domains;
1090                         r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname);
1091                         if (r >= 0) {
1092                                 r = ordered_set_put_strdup(target_domains, domainname);
1093                                 if (r < 0)
1094                                         return r;
1095                         } else if (r != -ENODATA)
1096                                 return r;
1097
1098                         r = sd_dhcp_lease_get_search_domains(link->dhcp_lease, &domains);
1099                         if (r >= 0) {
1100                                 r = ordered_set_put_strdupv(target_domains, domains);
1101                                 if (r < 0)
1102                                         return r;
1103                         } else if (r != -ENODATA)
1104                                 return r;
1105                 }
1106         }
1107
1108         operstate_str = link_operstate_to_string(operstate);
1109         assert(operstate_str);
1110
1111         r = fopen_temporary(m->state_file, &f, &temp_path);
1112         if (r < 0)
1113                 return r;
1114
1115         (void) fchmod(fileno(f), 0644);
1116
1117         fprintf(f,
1118                 "# This is private data. Do not parse.\n"
1119                 "OPER_STATE=%s\n", operstate_str);
1120
1121         print_string_set(f, "DNS=", dns);
1122         print_string_set(f, "NTP=", ntp);
1123         print_string_set(f, "DOMAINS=", search_domains);
1124         print_string_set(f, "ROUTE_DOMAINS=", route_domains);
1125
1126         SET_FOREACH(rule, m->rules, i) {
1127                 _cleanup_free_ char *from_str = NULL, *to_str = NULL;
1128                 fputs("RULE=", f);
1129
1130                 if (!in_addr_is_null(rule->family, &rule->from)) {
1131                         r = in_addr_to_string(rule->family, &rule->from, &from_str);
1132                         if (r < 0)
1133                                 goto fail;
1134                 }
1135
1136                 if (!in_addr_is_null(rule->family, &rule->to)) {
1137                         r = in_addr_to_string(rule->family, &rule->to, &to_str);
1138                         if (r < 0)
1139                                 goto fail;
1140                 }
1141
1142                 fprintf(f, "from=%s%s/%hhu to=%s%s/%hhu tos=%hhu fwmark=%"PRIu32"/%"PRIu32" table=%hhu", space ? " " : "", from_str,
1143                         rule->from_prefixlen, space ? " " : "", to_str, rule->to_prefixlen, rule->tos, rule->fwmark, rule->fwmask, rule->table);
1144
1145                 fputc('\n', f);
1146         }
1147
1148         r = fflush_and_check(f);
1149         if (r < 0)
1150                 goto fail;
1151
1152         if (rename(temp_path, m->state_file) < 0) {
1153                 r = -errno;
1154                 goto fail;
1155         }
1156
1157         if (m->operational_state != operstate) {
1158                 m->operational_state = operstate;
1159                 r = manager_send_changed(m, "OperationalState", NULL);
1160                 if (r < 0)
1161                         log_error_errno(r, "Could not emit changed OperationalState: %m");
1162         }
1163
1164         m->dirty = false;
1165
1166         return 0;
1167
1168 fail:
1169         (void) unlink(m->state_file);
1170         (void) unlink(temp_path);
1171
1172         return log_error_errno(r, "Failed to save network state to %s: %m", m->state_file);
1173 }
1174
1175 static int manager_dirty_handler(sd_event_source *s, void *userdata) {
1176         Manager *m = userdata;
1177         Link *link;
1178         Iterator i;
1179         int r;
1180
1181         assert(m);
1182
1183         if (m->dirty)
1184                 manager_save(m);
1185
1186         SET_FOREACH(link, m->dirty_links, i) {
1187                 r = link_save(link);
1188                 if (r >= 0)
1189                         link_clean(link);
1190         }
1191
1192         return 1;
1193 }
1194
1195 int manager_new(Manager **ret, sd_event *event) {
1196         _cleanup_manager_free_ Manager *m = NULL;
1197         int r;
1198
1199         m = new0(Manager, 1);
1200         if (!m)
1201                 return -ENOMEM;
1202
1203         m->state_file = strdup("/run/systemd/netif/state");
1204         if (!m->state_file)
1205                 return -ENOMEM;
1206
1207         m->event = sd_event_ref(event);
1208
1209         r = sd_event_add_post(m->event, NULL, manager_dirty_handler, m);
1210         if (r < 0)
1211                 return r;
1212
1213         r = manager_connect_rtnl(m);
1214         if (r < 0)
1215                 return r;
1216
1217         r = manager_connect_udev(m);
1218         if (r < 0)
1219                 return r;
1220
1221         m->netdevs = hashmap_new(&string_hash_ops);
1222         if (!m->netdevs)
1223                 return -ENOMEM;
1224
1225         LIST_HEAD_INIT(m->networks);
1226
1227         r = setup_default_address_pool(m);
1228         if (r < 0)
1229                 return r;
1230
1231         m->duid.type = DUID_TYPE_EN;
1232
1233         (void) routing_policy_rule_load(m);
1234
1235         *ret = m;
1236         m = NULL;
1237
1238         return 0;
1239 }
1240
1241 void manager_free(Manager *m) {
1242         RoutingPolicyRule *rule;
1243         Network *network;
1244         NetDev *netdev;
1245         Link *link;
1246         AddressPool *pool;
1247
1248         if (!m)
1249                 return;
1250
1251         free(m->state_file);
1252
1253         while ((network = m->networks))
1254                 network_free(network);
1255
1256         while ((link = hashmap_first(m->links)))
1257                 link_unref(link);
1258         hashmap_free(m->links);
1259
1260         hashmap_free(m->networks_by_name);
1261
1262         while ((netdev = hashmap_first(m->netdevs)))
1263                 netdev_unref(netdev);
1264         hashmap_free(m->netdevs);
1265
1266         while ((pool = m->address_pools))
1267                 address_pool_free(pool);
1268
1269         set_free(m->rules);
1270         set_free(m->rules_foreign);
1271
1272         while ((rule = set_steal_first(m->rules_saved)))
1273                 free(rule);
1274
1275         set_free(m->rules_saved);
1276
1277         sd_netlink_unref(m->rtnl);
1278         sd_event_unref(m->event);
1279
1280         sd_event_source_unref(m->udev_event_source);
1281         udev_monitor_unref(m->udev_monitor);
1282         udev_unref(m->udev);
1283
1284         sd_bus_unref(m->bus);
1285         sd_bus_slot_unref(m->prepare_for_sleep_slot);
1286         sd_event_source_unref(m->bus_retry_event_source);
1287
1288         free(m->dynamic_timezone);
1289         free(m->dynamic_hostname);
1290
1291         free(m);
1292 }
1293
1294 int manager_start(Manager *m) {
1295         Link *link;
1296         Iterator i;
1297
1298         assert(m);
1299
1300         /* The dirty handler will deal with future serialization, but the first one
1301            must be done explicitly. */
1302
1303         manager_save(m);
1304
1305         HASHMAP_FOREACH(link, m->links, i)
1306                 link_save(link);
1307
1308         return 0;
1309 }
1310
1311 int manager_load_config(Manager *m) {
1312         int r;
1313
1314         /* update timestamp */
1315         paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, true);
1316
1317         r = netdev_load(m);
1318         if (r < 0)
1319                 return r;
1320
1321         r = network_load(m);
1322         if (r < 0)
1323                 return r;
1324
1325         return 0;
1326 }
1327
1328 bool manager_should_reload(Manager *m) {
1329         return paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, false);
1330 }
1331
1332 int manager_rtnl_enumerate_links(Manager *m) {
1333         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1334         sd_netlink_message *link;
1335         int r;
1336
1337         assert(m);
1338         assert(m->rtnl);
1339
1340         r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);
1341         if (r < 0)
1342                 return r;
1343
1344         r = sd_netlink_message_request_dump(req, true);
1345         if (r < 0)
1346                 return r;
1347
1348         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1349         if (r < 0)
1350                 return r;
1351
1352         for (link = reply; link; link = sd_netlink_message_next(link)) {
1353                 int k;
1354
1355                 m->enumerating = true;
1356
1357                 k = manager_rtnl_process_link(m->rtnl, link, m);
1358                 if (k < 0)
1359                         r = k;
1360
1361                 m->enumerating = false;
1362         }
1363
1364         return r;
1365 }
1366
1367 int manager_rtnl_enumerate_addresses(Manager *m) {
1368         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1369         sd_netlink_message *addr;
1370         int r;
1371
1372         assert(m);
1373         assert(m->rtnl);
1374
1375         r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, 0);
1376         if (r < 0)
1377                 return r;
1378
1379         r = sd_netlink_message_request_dump(req, true);
1380         if (r < 0)
1381                 return r;
1382
1383         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1384         if (r < 0)
1385                 return r;
1386
1387         for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
1388                 int k;
1389
1390                 m->enumerating = true;
1391
1392                 k = manager_rtnl_process_address(m->rtnl, addr, m);
1393                 if (k < 0)
1394                         r = k;
1395
1396                 m->enumerating = false;
1397         }
1398
1399         return r;
1400 }
1401
1402 int manager_rtnl_enumerate_routes(Manager *m) {
1403         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1404         sd_netlink_message *route;
1405         int r;
1406
1407         assert(m);
1408         assert(m->rtnl);
1409
1410         r = sd_rtnl_message_new_route(m->rtnl, &req, RTM_GETROUTE, 0, 0);
1411         if (r < 0)
1412                 return r;
1413
1414         r = sd_netlink_message_request_dump(req, true);
1415         if (r < 0)
1416                 return r;
1417
1418         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1419         if (r < 0)
1420                 return r;
1421
1422         for (route = reply; route; route = sd_netlink_message_next(route)) {
1423                 int k;
1424
1425                 m->enumerating = true;
1426
1427                 k = manager_rtnl_process_route(m->rtnl, route, m);
1428                 if (k < 0)
1429                         r = k;
1430
1431                 m->enumerating = false;
1432         }
1433
1434         return r;
1435 }
1436
1437 int manager_rtnl_enumerate_rules(Manager *m) {
1438         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1439         sd_netlink_message *rule;
1440         int r;
1441
1442         assert(m);
1443         assert(m->rtnl);
1444
1445         r = sd_rtnl_message_new_routing_policy_rule(m->rtnl, &req, RTM_GETRULE, 0);
1446         if (r < 0)
1447                 return r;
1448
1449         r = sd_netlink_message_request_dump(req, true);
1450         if (r < 0)
1451                 return r;
1452
1453         r = sd_netlink_call(m->rtnl, req, 0, &reply);
1454         if (r < 0)
1455                 return r;
1456
1457         for (rule = reply; rule; rule = sd_netlink_message_next(rule)) {
1458                 int k;
1459
1460                 m->enumerating = true;
1461
1462                 k = manager_rtnl_process_rule(m->rtnl, rule, m);
1463                 if (k < 0)
1464                         r = k;
1465
1466                 m->enumerating = false;
1467         }
1468
1469         return r;
1470 }
1471
1472 int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, union in_addr_union *found) {
1473         AddressPool *p;
1474         int r;
1475
1476         assert(m);
1477         assert(prefixlen > 0);
1478         assert(found);
1479
1480         LIST_FOREACH(address_pools, p, m->address_pools) {
1481                 if (p->family != family)
1482                         continue;
1483
1484                 r = address_pool_acquire(p, prefixlen, found);
1485                 if (r != 0)
1486                         return r;
1487         }
1488
1489         return 0;
1490 }
1491
1492 Link* manager_find_uplink(Manager *m, Link *exclude) {
1493         _cleanup_free_ struct local_address *gateways = NULL;
1494         int n, i;
1495
1496         assert(m);
1497
1498         /* Looks for a suitable "uplink", via black magic: an
1499          * interface that is up and where the default route with the
1500          * highest priority points to. */
1501
1502         n = local_gateways(m->rtnl, 0, AF_UNSPEC, &gateways);
1503         if (n < 0) {
1504                 log_warning_errno(n, "Failed to determine list of default gateways: %m");
1505                 return NULL;
1506         }
1507
1508         for (i = 0; i < n; i++) {
1509                 Link *link;
1510
1511                 link = hashmap_get(m->links, INT_TO_PTR(gateways[i].ifindex));
1512                 if (!link) {
1513                         log_debug("Weird, found a gateway for a link we don't know. Ignoring.");
1514                         continue;
1515                 }
1516
1517                 if (link == exclude)
1518                         continue;
1519
1520                 if (link->operstate < LINK_OPERSTATE_ROUTABLE)
1521                         continue;
1522
1523                 return link;
1524         }
1525
1526         return NULL;
1527 }
1528
1529 void manager_dirty(Manager *manager) {
1530         assert(manager);
1531
1532         /* the serialized state in /run is no longer up-to-date */
1533         manager->dirty = true;
1534 }
1535
1536 static int set_hostname_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
1537         Manager *manager = userdata;
1538         const sd_bus_error *e;
1539
1540         assert(m);
1541         assert(manager);
1542
1543         e = sd_bus_message_get_error(m);
1544         if (e)
1545                 log_warning_errno(sd_bus_error_get_errno(e), "Could not set hostname: %s", e->message);
1546
1547         return 1;
1548 }
1549
1550 int manager_set_hostname(Manager *m, const char *hostname) {
1551         int r;
1552
1553         log_debug("Setting transient hostname: '%s'", strna(hostname));
1554         if (free_and_strdup(&m->dynamic_hostname, hostname) < 0)
1555                 return log_oom();
1556
1557         if (!m->bus) {
1558                 /* TODO: replace by assert when we can rely on kdbus */
1559                 log_info("Not connected to system bus, ignoring transient hostname.");
1560                 return 0;
1561         }
1562
1563         r = sd_bus_call_method_async(
1564                         m->bus,
1565                         NULL,
1566                         "org.freedesktop.hostname1",
1567                         "/org/freedesktop/hostname1",
1568                         "org.freedesktop.hostname1",
1569                         "SetHostname",
1570                         set_hostname_handler,
1571                         m,
1572                         "sb",
1573                         hostname,
1574                         false);
1575
1576         if (r < 0)
1577                 return log_error_errno(r, "Could not set transient hostname: %m");
1578
1579         return 0;
1580 }
1581
1582 static int set_timezone_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
1583         Manager *manager = userdata;
1584         const sd_bus_error *e;
1585
1586         assert(m);
1587         assert(manager);
1588
1589         e = sd_bus_message_get_error(m);
1590         if (e)
1591                 log_warning_errno(sd_bus_error_get_errno(e), "Could not set timezone: %s", e->message);
1592
1593         return 1;
1594 }
1595
1596 int manager_set_timezone(Manager *m, const char *tz) {
1597         int r;
1598
1599         assert(m);
1600         assert(tz);
1601
1602         log_debug("Setting system timezone: '%s'", tz);
1603         if (free_and_strdup(&m->dynamic_timezone, tz) < 0)
1604                 return log_oom();
1605
1606         if (!m->bus) {
1607                 log_info("Not connected to system bus, ignoring timezone.");
1608                 return 0;
1609         }
1610
1611         r = sd_bus_call_method_async(
1612                         m->bus,
1613                         NULL,
1614                         "org.freedesktop.timedate1",
1615                         "/org/freedesktop/timedate1",
1616                         "org.freedesktop.timedate1",
1617                         "SetTimezone",
1618                         set_timezone_handler,
1619                         m,
1620                         "sb",
1621                         tz,
1622                         false);
1623         if (r < 0)
1624                 return log_error_errno(r, "Could not set timezone: %m");
1625
1626         return 0;
1627 }