/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include #include #include #include #include #include #include "sd-daemon.h" #include "sd-netlink.h" #include "alloc-util.h" #include "bus-error.h" #include "bus-log-control-api.h" #include "bus-polkit.h" #include "bus-util.h" #include "conf-parser.h" #include "def.h" #include "device-private.h" #include "device-util.h" #include "dns-domain.h" #include "fd-util.h" #include "fileio.h" #include "firewall-util.h" #include "local-addresses.h" #include "netlink-util.h" #include "network-internal.h" #include "networkd-address-pool.h" #include "networkd-dhcp-server-bus.h" #include "networkd-dhcp6.h" #include "networkd-link-bus.h" #include "networkd-manager-bus.h" #include "networkd-manager.h" #include "networkd-neighbor.h" #include "networkd-network-bus.h" #include "networkd-nexthop.h" #include "networkd-routing-policy-rule.h" #include "networkd-speed-meter.h" #include "ordered-set.h" #include "path-lookup.h" #include "path-util.h" #include "selinux-util.h" #include "set.h" #include "signal-util.h" #include "stat-util.h" #include "strv.h" #include "sysctl-util.h" #include "tmpfile-util.h" #include "udev-util.h" /* use 128 MB for receive socket kernel queue. */ #define RCVBUF_SIZE (128*1024*1024) static int manager_reset_all(Manager *m) { Link *link; int r; assert(m); HASHMAP_FOREACH(link, m->links) { r = link_carrier_reset(link); if (r < 0) log_link_warning_errno(link, r, "Could not reset carrier: %m"); } return 0; } static int match_prepare_for_sleep(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) { Manager *m = userdata; int b, r; assert(message); assert(m); r = sd_bus_message_read(message, "b", &b); if (r < 0) { bus_log_parse_error(r); return 0; } if (b) return 0; log_debug("Coming back from suspend, resetting all connections..."); (void) manager_reset_all(m); return 0; } static int on_connected(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) { Manager *m = userdata; assert(message); assert(m); /* Did we get a timezone or transient hostname from DHCP while D-Bus wasn't up yet? */ if (m->dynamic_hostname) (void) manager_set_hostname(m, m->dynamic_hostname); if (m->dynamic_timezone) (void) manager_set_timezone(m, m->dynamic_timezone); if (m->links_requesting_uuid) (void) manager_request_product_uuid(m, NULL); return 0; } int manager_connect_bus(Manager *m) { int r; assert(m); if (m->bus) return 0; r = bus_open_system_watch_bind_with_description(&m->bus, "bus-api-network"); if (r < 0) return log_error_errno(r, "Failed to connect to bus: %m"); r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/network1", "org.freedesktop.network1.Manager", manager_vtable, m); if (r < 0) return log_error_errno(r, "Failed to add manager object vtable: %m"); r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/link", "org.freedesktop.network1.Link", link_vtable, link_object_find, m); if (r < 0) return log_error_errno(r, "Failed to add link object vtable: %m"); r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/link", "org.freedesktop.network1.DHCPServer", dhcp_server_vtable, link_object_find, m); if (r < 0) return log_error_errno(r, "Failed to add link object vtable: %m"); r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/link", link_node_enumerator, m); if (r < 0) return log_error_errno(r, "Failed to add link enumerator: %m"); r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/network", "org.freedesktop.network1.Network", network_vtable, network_object_find, m); if (r < 0) return log_error_errno(r, "Failed to add network object vtable: %m"); r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/network", network_node_enumerator, m); if (r < 0) return log_error_errno(r, "Failed to add network enumerator: %m"); r = bus_log_control_api_register(m->bus); if (r < 0) return r; r = sd_bus_request_name_async(m->bus, NULL, "org.freedesktop.network1", 0, NULL, NULL); if (r < 0) return log_error_errno(r, "Failed to request name: %m"); r = sd_bus_attach_event(m->bus, m->event, 0); if (r < 0) return log_error_errno(r, "Failed to attach bus to event loop: %m"); r = sd_bus_match_signal_async( m->bus, NULL, "org.freedesktop.DBus.Local", NULL, "org.freedesktop.DBus.Local", "Connected", on_connected, NULL, m); if (r < 0) return log_error_errno(r, "Failed to request match on Connected signal: %m"); r = sd_bus_match_signal_async( m->bus, NULL, "org.freedesktop.login1", "/org/freedesktop/login1", "org.freedesktop.login1.Manager", "PrepareForSleep", match_prepare_for_sleep, NULL, m); if (r < 0) log_warning_errno(r, "Failed to request match for PrepareForSleep, ignoring: %m"); return 0; } static int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) { Manager *m = userdata; DeviceAction action; Link *link = NULL; int r, ifindex; assert(m); assert(device); r = device_get_action(device, &action); if (r < 0) { log_device_debug_errno(device, r, "Failed to get udev action, ignoring device: %m"); return 0; } /* Ignore the "remove" uevent — let's remove a device only if rtnetlink says so. All other uevents * are "positive" events in some form, i.e. inform us about a changed or new network interface, that * still exists — and we are interested in that. */ if (action == DEVICE_ACTION_REMOVE) return 0; r = sd_device_get_ifindex(device, &ifindex); if (r < 0) { log_device_debug_errno(device, r, "Ignoring udev %s event for device without ifindex or with invalid ifindex: %m", device_action_to_string(action)); return 0; } r = device_is_renaming(device); if (r < 0) { log_device_error_errno(device, r, "Failed to determine the device is renamed or not, ignoring '%s' uevent: %m", device_action_to_string(action)); return 0; } if (r > 0) { log_device_debug(device, "Interface is under renaming, wait for the interface to be renamed."); return 0; } r = link_get(m, ifindex, &link); if (r < 0) { if (r != -ENODEV) log_debug_errno(r, "Failed to get link from ifindex %i, ignoring: %m", ifindex); return 0; } (void) link_initialized(link, device); return 0; } static int manager_connect_udev(Manager *m) { int r; /* udev does not initialize devices inside containers, so we rely on them being already * initialized before entering the container. */ if (path_is_read_only_fs("/sys") > 0) return 0; r = sd_device_monitor_new(&m->device_monitor); if (r < 0) return log_error_errno(r, "Failed to initialize device monitor: %m"); r = sd_device_monitor_set_receive_buffer_size(m->device_monitor, RCVBUF_SIZE); if (r < 0) log_warning_errno(r, "Failed to increase buffer size for device monitor, ignoring: %m"); r = sd_device_monitor_filter_add_match_subsystem_devtype(m->device_monitor, "net", NULL); if (r < 0) return log_error_errno(r, "Could not add device monitor filter: %m"); r = sd_device_monitor_attach_event(m->device_monitor, m->event); if (r < 0) return log_error_errno(r, "Failed to attach event to device monitor: %m"); r = sd_device_monitor_start(m->device_monitor, manager_udev_process_link, m); if (r < 0) return log_error_errno(r, "Failed to start device monitor: %m"); return 0; } static int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *m) { Link *link = NULL; NetDev *netdev = NULL; uint16_t type; const char *name; int r, ifindex; assert(rtnl); assert(message); assert(m); if (sd_netlink_message_is_error(message)) { r = sd_netlink_message_get_errno(message); if (r < 0) log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring"); return 0; } r = sd_netlink_message_get_type(message, &type); if (r < 0) { log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m"); return 0; } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) { log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type); return 0; } r = sd_rtnl_message_link_get_ifindex(message, &ifindex); if (r < 0) { log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m"); return 0; } else if (ifindex <= 0) { log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex); return 0; } r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name); if (r < 0) { log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m"); return 0; } (void) link_get(m, ifindex, &link); (void) netdev_get(m, name, &netdev); switch (type) { case RTM_NEWLINK: if (!link) { /* link is new, so add it */ r = link_add(m, message, &link); if (r < 0) { log_warning_errno(r, "Could not process new link message, ignoring: %m"); return 0; } } if (netdev) { /* netdev exists, so make sure the ifindex matches */ r = netdev_set_ifindex(netdev, message); if (r < 0) { log_warning_errno(r, "Could not process new link message for netdev, ignoring: %m"); return 0; } } r = link_update(link, message); if (r < 0) { log_warning_errno(r, "Could not process link message, ignoring: %m"); return 0; } break; case RTM_DELLINK: link_drop(link); netdev_drop(netdev); break; default: assert_not_reached("Received link message with invalid RTNL message type."); } return 1; } static int systemd_netlink_fd(void) { int n, fd, rtnl_fd = -EINVAL; n = sd_listen_fds(true); if (n <= 0) return -EINVAL; for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++) { if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) { if (rtnl_fd >= 0) return -EINVAL; rtnl_fd = fd; } } return rtnl_fd; } static int manager_connect_genl(Manager *m) { int r; assert(m); r = sd_genl_socket_open(&m->genl); if (r < 0) return r; r = sd_netlink_inc_rcvbuf(m->genl, RCVBUF_SIZE); if (r < 0) log_warning_errno(r, "Failed to increase receive buffer size for general netlink socket, ignoring: %m"); r = sd_netlink_attach_event(m->genl, m->event, 0); if (r < 0) return r; return 0; } static int manager_connect_rtnl(Manager *m) { int fd, r; assert(m); fd = systemd_netlink_fd(); if (fd < 0) r = sd_netlink_open(&m->rtnl); else r = sd_netlink_open_fd(&m->rtnl, fd); if (r < 0) return r; /* Bump receiver buffer, but only if we are not called via socket activation, as in that * case systemd sets the receive buffer size for us, and the value in the .socket unit * should take full effect. */ if (fd < 0) { r = sd_netlink_inc_rcvbuf(m->rtnl, RCVBUF_SIZE); if (r < 0) log_warning_errno(r, "Failed to increase receive buffer size for rtnl socket, ignoring: %m"); } r = sd_netlink_attach_event(m->rtnl, m->event, 0); if (r < 0) return r; r = netlink_add_match(m->rtnl, NULL, RTM_NEWLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link"); if (r < 0) return r; r = netlink_add_match(m->rtnl, NULL, RTM_DELLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link"); if (r < 0) return r; r = netlink_add_match(m->rtnl, NULL, RTM_NEWADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address"); if (r < 0) return r; r = netlink_add_match(m->rtnl, NULL, RTM_DELADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address"); if (r < 0) return r; r = netlink_add_match(m->rtnl, NULL, RTM_NEWNEIGH, &manager_rtnl_process_neighbor, NULL, m, "network-rtnl_process_neighbor"); if (r < 0) return r; r = netlink_add_match(m->rtnl, NULL, RTM_DELNEIGH, &manager_rtnl_process_neighbor, NULL, m, "network-rtnl_process_neighbor"); if (r < 0) return r; r = netlink_add_match(m->rtnl, NULL, RTM_NEWROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route"); if (r < 0) return r; r = netlink_add_match(m->rtnl, NULL, RTM_DELROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route"); if (r < 0) return r; r = netlink_add_match(m->rtnl, NULL, RTM_NEWRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule"); if (r < 0) return r; r = netlink_add_match(m->rtnl, NULL, RTM_DELRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule"); if (r < 0) return r; r = netlink_add_match(m->rtnl, NULL, RTM_NEWNEXTHOP, &manager_rtnl_process_nexthop, NULL, m, "network-rtnl_process_nexthop"); if (r < 0) return r; r = netlink_add_match(m->rtnl, NULL, RTM_DELNEXTHOP, &manager_rtnl_process_nexthop, NULL, m, "network-rtnl_process_nexthop"); if (r < 0) return r; return 0; } static int ordered_set_put_dns_server(OrderedSet *s, int ifindex, struct in_addr_full *dns) { const char *p; int r; assert(s); assert(dns); if (dns->ifindex != 0 && dns->ifindex != ifindex) return 0; p = in_addr_full_to_string(dns); if (!p) return 0; r = ordered_set_put_strdup(s, p); if (r == -EEXIST) return 0; return r; } static int ordered_set_put_dns_servers(OrderedSet *s, int ifindex, struct in_addr_full **dns, unsigned n) { int r, c = 0; unsigned i; assert(s); assert(dns || n == 0); for (i = 0; i < n; i++) { r = ordered_set_put_dns_server(s, ifindex, dns[i]); if (r < 0) return r; c += r; } return c; } static int ordered_set_put_in4_addr(OrderedSet *s, const struct in_addr *address) { char *p; int r; assert(s); assert(address); r = in_addr_to_string(AF_INET, (const union in_addr_union*) address, &p); if (r < 0) return r; r = ordered_set_consume(s, p); if (r == -EEXIST) return 0; return r; } static int ordered_set_put_in4_addrv(OrderedSet *s, const struct in_addr *addresses, size_t n, bool (*predicate)(const struct in_addr *addr)) { int r, c = 0; size_t i; assert(s); assert(n == 0 || addresses); for (i = 0; i < n; i++) { if (predicate && !predicate(&addresses[i])) continue; r = ordered_set_put_in4_addr(s, addresses+i); if (r < 0) return r; c += r; } return c; } static int manager_save(Manager *m) { _cleanup_ordered_set_free_free_ OrderedSet *dns = NULL, *ntp = NULL, *sip = NULL, *search_domains = NULL, *route_domains = NULL; const char *operstate_str, *carrier_state_str, *address_state_str; LinkOperationalState operstate = LINK_OPERSTATE_OFF; LinkCarrierState carrier_state = LINK_CARRIER_STATE_OFF; LinkAddressState address_state = LINK_ADDRESS_STATE_OFF; _cleanup_free_ char *temp_path = NULL; _cleanup_strv_free_ char **p = NULL; _cleanup_fclose_ FILE *f = NULL; Link *link; int r; assert(m); assert(m->state_file); /* We add all NTP and DNS server to a set, to filter out duplicates */ dns = ordered_set_new(&string_hash_ops); if (!dns) return -ENOMEM; ntp = ordered_set_new(&string_hash_ops); if (!ntp) return -ENOMEM; sip = ordered_set_new(&string_hash_ops); if (!sip) return -ENOMEM; search_domains = ordered_set_new(&dns_name_hash_ops); if (!search_domains) return -ENOMEM; route_domains = ordered_set_new(&dns_name_hash_ops); if (!route_domains) return -ENOMEM; HASHMAP_FOREACH(link, m->links) { const struct in_addr *addresses; if (link->flags & IFF_LOOPBACK) continue; if (link->operstate > operstate) operstate = link->operstate; if (link->carrier_state > carrier_state) carrier_state = link->carrier_state; if (link->address_state > address_state) address_state = link->address_state; if (!link->network) continue; /* First add the static configured entries */ if (link->n_dns != (unsigned) -1) r = ordered_set_put_dns_servers(dns, link->ifindex, link->dns, link->n_dns); else r = ordered_set_put_dns_servers(dns, link->ifindex, link->network->dns, link->network->n_dns); if (r < 0) return r; r = ordered_set_put_strdupv(ntp, link->ntp ?: link->network->ntp); if (r < 0) return r; r = ordered_set_put_string_set(search_domains, link->search_domains ?: link->network->search_domains); if (r < 0) return r; r = ordered_set_put_string_set(route_domains, link->route_domains ?: link->network->route_domains); if (r < 0) return r; if (!link->dhcp_lease) continue; /* Secondly, add the entries acquired via DHCP */ if (link->network->dhcp_use_dns) { r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses); if (r > 0) { r = ordered_set_put_in4_addrv(dns, addresses, r, in4_addr_is_non_local); if (r < 0) return r; } else if (r < 0 && r != -ENODATA) return r; } if (link->network->dhcp_use_ntp) { r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses); if (r > 0) { r = ordered_set_put_in4_addrv(ntp, addresses, r, in4_addr_is_non_local); if (r < 0) return r; } else if (r < 0 && r != -ENODATA) return r; } if (link->network->dhcp_use_sip) { r = sd_dhcp_lease_get_sip(link->dhcp_lease, &addresses); if (r > 0) { r = ordered_set_put_in4_addrv(sip, addresses, r, in4_addr_is_non_local); if (r < 0) return r; } else if (r < 0 && r != -ENODATA) return r; } if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) { const char *domainname; char **domains = NULL; OrderedSet *target_domains = (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) ? search_domains : route_domains; r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname); if (r >= 0) { r = ordered_set_put_strdup(target_domains, domainname); if (r < 0) return r; } else if (r != -ENODATA) return r; r = sd_dhcp_lease_get_search_domains(link->dhcp_lease, &domains); if (r >= 0) { r = ordered_set_put_strdupv(target_domains, domains); if (r < 0) return r; } else if (r != -ENODATA) return r; } } if (carrier_state >= LINK_CARRIER_STATE_ENSLAVED) carrier_state = LINK_CARRIER_STATE_CARRIER; operstate_str = link_operstate_to_string(operstate); assert(operstate_str); carrier_state_str = link_carrier_state_to_string(carrier_state); assert(carrier_state_str); address_state_str = link_address_state_to_string(address_state); assert(address_state_str); r = fopen_temporary(m->state_file, &f, &temp_path); if (r < 0) return r; (void) fchmod(fileno(f), 0644); fprintf(f, "# This is private data. Do not parse.\n" "OPER_STATE=%s\n" "CARRIER_STATE=%s\n" "ADDRESS_STATE=%s\n", operstate_str, carrier_state_str, address_state_str); ordered_set_print(f, "DNS=", dns); ordered_set_print(f, "NTP=", ntp); ordered_set_print(f, "SIP=", sip); ordered_set_print(f, "DOMAINS=", search_domains); ordered_set_print(f, "ROUTE_DOMAINS=", route_domains); r = routing_policy_serialize_rules(m->rules, f); if (r < 0) goto fail; r = fflush_and_check(f); if (r < 0) goto fail; if (rename(temp_path, m->state_file) < 0) { r = -errno; goto fail; } if (m->operational_state != operstate) { m->operational_state = operstate; if (strv_extend(&p, "OperationalState") < 0) log_oom(); } if (m->carrier_state != carrier_state) { m->carrier_state = carrier_state; if (strv_extend(&p, "CarrierState") < 0) log_oom(); } if (m->address_state != address_state) { m->address_state = address_state; if (strv_extend(&p, "AddressState") < 0) log_oom(); } if (p) { r = manager_send_changed_strv(m, p); if (r < 0) log_error_errno(r, "Could not emit changed properties: %m"); } m->dirty = false; return 0; fail: (void) unlink(m->state_file); (void) unlink(temp_path); return log_error_errno(r, "Failed to save network state to %s: %m", m->state_file); } static int manager_dirty_handler(sd_event_source *s, void *userdata) { Manager *m = userdata; Link *link; assert(m); if (m->dirty) manager_save(m); SET_FOREACH(link, m->dirty_links) (void) link_save_and_clean(link); return 1; } static int signal_terminate_callback(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { Manager *m = userdata; assert(m); m->restarting = false; log_debug("Terminate operation initiated."); return sd_event_exit(sd_event_source_get_event(s), 0); } static int signal_restart_callback(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { Manager *m = userdata; assert(m); m->restarting = true; log_debug("Restart operation initiated."); return sd_event_exit(sd_event_source_get_event(s), 0); } int manager_new(Manager **ret) { _cleanup_(manager_freep) Manager *m = NULL; int r; m = new(Manager, 1); if (!m) return -ENOMEM; *m = (Manager) { .speed_meter_interval_usec = SPEED_METER_DEFAULT_TIME_INTERVAL, .manage_foreign_routes = true, .ethtool_fd = -1, }; m->state_file = strdup("/run/systemd/netif/state"); if (!m->state_file) return -ENOMEM; r = sd_event_default(&m->event); if (r < 0) return r; assert_se(sigprocmask_many(SIG_SETMASK, NULL, SIGINT, SIGTERM, SIGUSR2, -1) >= 0); (void) sd_event_set_watchdog(m->event, true); (void) sd_event_add_signal(m->event, NULL, SIGTERM, signal_terminate_callback, m); (void) sd_event_add_signal(m->event, NULL, SIGINT, signal_terminate_callback, m); (void) sd_event_add_signal(m->event, NULL, SIGUSR2, signal_restart_callback, m); r = sd_event_add_post(m->event, NULL, manager_dirty_handler, m); if (r < 0) return r; r = manager_connect_rtnl(m); if (r < 0) return r; r = manager_connect_genl(m); if (r < 0) return r; r = manager_connect_udev(m); if (r < 0) return r; r = sd_resolve_default(&m->resolve); if (r < 0) return r; r = sd_resolve_attach_event(m->resolve, m->event, 0); if (r < 0) return r; r = address_pool_setup_default(m); if (r < 0) return r; m->duid.type = DUID_TYPE_EN; (void) routing_policy_load_rules(m->state_file, &m->rules_saved); *ret = TAKE_PTR(m); return 0; } void manager_free(Manager *m) { Link *link; if (!m) return; free(m->state_file); HASHMAP_FOREACH(link, m->links) (void) link_stop_engines(link, true); m->dhcp6_prefixes = hashmap_free_with_destructor(m->dhcp6_prefixes, dhcp6_pd_free); m->dhcp6_pd_prefixes = set_free_with_destructor(m->dhcp6_pd_prefixes, dhcp6_pd_free); m->dirty_links = set_free_with_destructor(m->dirty_links, link_unref); m->links_requesting_uuid = set_free_with_destructor(m->links_requesting_uuid, link_unref); m->links = hashmap_free_with_destructor(m->links, link_unref); m->duids_requesting_uuid = set_free(m->duids_requesting_uuid); m->networks = ordered_hashmap_free_with_destructor(m->networks, network_unref); m->netdevs = hashmap_free_with_destructor(m->netdevs, netdev_unref); ordered_set_free_free(m->address_pools); /* routing_policy_rule_free() access m->rules and m->rules_foreign. * So, it is necessary to set NULL after the sets are freed. */ m->rules = set_free(m->rules); m->rules_foreign = set_free(m->rules_foreign); set_free(m->rules_saved); sd_netlink_unref(m->rtnl); sd_netlink_unref(m->genl); sd_resolve_unref(m->resolve); /* reject (e.g. unreachable) type routes are managed by Manager, but may be referenced by a * link. E.g., DHCP6 with prefix delegation creates unreachable routes, and they are referenced * by the upstream link. And the links may be referenced by netlink slots. Hence, two * set_free() must be called after the above sd_netlink_unref(). */ m->routes = set_free(m->routes); m->routes_foreign = set_free(m->routes_foreign); sd_event_source_unref(m->speed_meter_event_source); sd_event_unref(m->event); sd_device_monitor_unref(m->device_monitor); bus_verify_polkit_async_registry_free(m->polkit_registry); sd_bus_flush_close_unref(m->bus); free(m->dynamic_timezone); free(m->dynamic_hostname); safe_close(m->ethtool_fd); m->fw_ctx = fw_ctx_free(m->fw_ctx); free(m); } int manager_start(Manager *m) { Link *link; int r; assert(m); r = manager_start_speed_meter(m); if (r < 0) return log_error_errno(r, "Failed to initialize speed meter: %m"); /* The dirty handler will deal with future serialization, but the first one must be done explicitly. */ manager_save(m); HASHMAP_FOREACH(link, m->links) (void) link_save(link); return 0; } int manager_load_config(Manager *m) { int r; /* update timestamp */ paths_check_timestamp(NETWORK_DIRS, &m->network_dirs_ts_usec, true); r = netdev_load(m, false); if (r < 0) return r; r = network_load(m, &m->networks); if (r < 0) return r; return 0; } bool manager_should_reload(Manager *m) { return paths_check_timestamp(NETWORK_DIRS, &m->network_dirs_ts_usec, false); } static int manager_enumerate_internal( Manager *m, sd_netlink_message *req, int (*process)(sd_netlink *, sd_netlink_message *, Manager *), const char *name) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *reply = NULL; int r; assert(m); assert(m->rtnl); assert(req); assert(process); r = sd_netlink_message_request_dump(req, true); if (r < 0) return r; r = sd_netlink_call(m->rtnl, req, 0, &reply); if (r < 0) { if (name && (r == -EOPNOTSUPP || (r == -EINVAL && mac_selinux_enforcing()))) { log_debug_errno(r, "%s are not supported by the kernel. Ignoring.", name); return 0; } return r; } for (sd_netlink_message *reply_one = reply; reply_one; reply_one = sd_netlink_message_next(reply_one)) { int k; m->enumerating = true; k = process(m->rtnl, reply_one, m); if (k < 0 && r >= 0) r = k; m->enumerating = false; } return r; } static int manager_enumerate_links(Manager *m) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; int r; assert(m); assert(m->rtnl); r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0); if (r < 0) return r; return manager_enumerate_internal(m, req, manager_rtnl_process_link, NULL); } static int manager_enumerate_addresses(Manager *m) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; int r; assert(m); assert(m->rtnl); r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, 0); if (r < 0) return r; return manager_enumerate_internal(m, req, manager_rtnl_process_address, NULL); } static int manager_enumerate_neighbors(Manager *m) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; int r; assert(m); assert(m->rtnl); r = sd_rtnl_message_new_neigh(m->rtnl, &req, RTM_GETNEIGH, 0, AF_UNSPEC); if (r < 0) return r; return manager_enumerate_internal(m, req, manager_rtnl_process_neighbor, NULL); } static int manager_enumerate_routes(Manager *m) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; int r; assert(m); assert(m->rtnl); if (!m->manage_foreign_routes) return 0; r = sd_rtnl_message_new_route(m->rtnl, &req, RTM_GETROUTE, 0, 0); if (r < 0) return r; return manager_enumerate_internal(m, req, manager_rtnl_process_route, NULL); } static int manager_enumerate_rules(Manager *m) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; int r; assert(m); assert(m->rtnl); r = sd_rtnl_message_new_routing_policy_rule(m->rtnl, &req, RTM_GETRULE, 0); if (r < 0) return r; return manager_enumerate_internal(m, req, manager_rtnl_process_rule, "Routing policy rules"); } static int manager_enumerate_nexthop(Manager *m) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; int r; assert(m); assert(m->rtnl); r = sd_rtnl_message_new_nexthop(m->rtnl, &req, RTM_GETNEXTHOP, 0, 0); if (r < 0) return r; return manager_enumerate_internal(m, req, manager_rtnl_process_nexthop, "Nexthop rules"); } int manager_enumerate(Manager *m) { int r; r = manager_enumerate_links(m); if (r < 0) return log_error_errno(r, "Could not enumerate links: %m"); r = manager_enumerate_addresses(m); if (r < 0) return log_error_errno(r, "Could not enumerate addresses: %m"); r = manager_enumerate_neighbors(m); if (r < 0) return log_error_errno(r, "Could not enumerate neighbors: %m"); r = manager_enumerate_routes(m); if (r < 0) return log_error_errno(r, "Could not enumerate routes: %m"); r = manager_enumerate_rules(m); if (r < 0) return log_error_errno(r, "Could not enumerate routing policy rules: %m"); r = manager_enumerate_nexthop(m); if (r < 0) return log_error_errno(r, "Could not enumerate nexthop rules: %m"); return 0; } Link* manager_find_uplink(Manager *m, Link *exclude) { _cleanup_free_ struct local_address *gateways = NULL; int n, i; assert(m); /* Looks for a suitable "uplink", via black magic: an * interface that is up and where the default route with the * highest priority points to. */ n = local_gateways(m->rtnl, 0, AF_UNSPEC, &gateways); if (n < 0) { log_warning_errno(n, "Failed to determine list of default gateways: %m"); return NULL; } for (i = 0; i < n; i++) { Link *link; link = hashmap_get(m->links, INT_TO_PTR(gateways[i].ifindex)); if (!link) { log_debug("Weird, found a gateway for a link we don't know. Ignoring."); continue; } if (link == exclude) continue; if (link->operstate < LINK_OPERSTATE_ROUTABLE) continue; return link; } return NULL; } void manager_dirty(Manager *manager) { assert(manager); /* the serialized state in /run is no longer up-to-date */ manager->dirty = true; } static int set_hostname_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) { const sd_bus_error *e; int r; assert(m); e = sd_bus_message_get_error(m); if (e) { r = sd_bus_error_get_errno(e); log_warning_errno(r, "Could not set hostname: %s", bus_error_message(e, r)); } return 1; } int manager_set_hostname(Manager *m, const char *hostname) { int r; log_debug("Setting transient hostname: '%s'", strna(hostname)); if (free_and_strdup(&m->dynamic_hostname, hostname) < 0) return log_oom(); if (!m->bus || sd_bus_is_ready(m->bus) <= 0) { log_debug("Not connected to system bus, setting hostname later."); return 0; } r = sd_bus_call_method_async( m->bus, NULL, "org.freedesktop.hostname1", "/org/freedesktop/hostname1", "org.freedesktop.hostname1", "SetHostname", set_hostname_handler, m, "sb", hostname, false); if (r < 0) return log_error_errno(r, "Could not set transient hostname: %m"); return 0; } static int set_timezone_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) { const sd_bus_error *e; int r; assert(m); e = sd_bus_message_get_error(m); if (e) { r = sd_bus_error_get_errno(e); log_warning_errno(r, "Could not set timezone: %s", bus_error_message(e, r)); } return 1; } int manager_set_timezone(Manager *m, const char *tz) { int r; assert(m); assert(tz); log_debug("Setting system timezone: '%s'", tz); if (free_and_strdup(&m->dynamic_timezone, tz) < 0) return log_oom(); if (!m->bus || sd_bus_is_ready(m->bus) <= 0) { log_debug("Not connected to system bus, setting timezone later."); return 0; } r = sd_bus_call_method_async( m->bus, NULL, "org.freedesktop.timedate1", "/org/freedesktop/timedate1", "org.freedesktop.timedate1", "SetTimezone", set_timezone_handler, m, "sb", tz, false); if (r < 0) return log_error_errno(r, "Could not set timezone: %m"); return 0; }