/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include #include #include #include #include #include #include #include "sd-netlink.h" #include "alloc-util.h" #include "bus-error.h" #include "bus-locator.h" #include "bus-log-control-api.h" #include "bus-polkit.h" #include "bus-util.h" #include "common-signal.h" #include "conf-parser.h" #include "constants.h" #include "daemon-util.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 "fs-util.h" #include "initrd-util.h" #include "local-addresses.h" #include "netlink-util.h" #include "network-internal.h" #include "networkd-address-pool.h" #include "networkd-address.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-queue.h" #include "networkd-route.h" #include "networkd-routing-policy-rule.h" #include "networkd-speed-meter.h" #include "networkd-state-file.h" #include "networkd-wifi.h" #include "networkd-wiphy.h" #include "ordered-set.h" #include "path-lookup.h" #include "path-util.h" #include "qdisc.h" #include "selinux-util.h" #include "set.h" #include "signal-util.h" #include "stat-util.h" #include "strv.h" #include "sysctl-util.h" #include "tclass.h" #include "tmpfile-util.h" #include "tuntap.h" #include "udev-util.h" /* use 128 MB for receive socket kernel queue. */ #define RCVBUF_SIZE (128*1024*1024) static int match_prepare_for_sleep(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) { Manager *m = ASSERT_PTR(userdata); Link *link; int b, r; assert(message); 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, reconfiguring all connections..."); HASHMAP_FOREACH(link, m->links_by_index) { r = link_reconfigure(link, /* force = */ true); if (r < 0) { log_link_warning_errno(link, r, "Failed to reconfigure interface: %m"); link_enter_failed(link); } } return 0; } static int on_connected(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) { Manager *m = ASSERT_PTR(userdata); assert(message); /* 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->product_uuid_requested) (void) manager_request_product_uuid(m); return 0; } static int manager_connect_bus(Manager *m) { int r; assert(m); assert(!m->bus); 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 = bus_add_implementation(m->bus, &manager_object, m); if (r < 0) return r; 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 = bus_match_signal_async( m->bus, NULL, bus_login_mgr, "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_process_uevent(sd_device_monitor *monitor, sd_device *device, void *userdata) { Manager *m = ASSERT_PTR(userdata); sd_device_action_t action; const char *s; int r; assert(device); r = sd_device_get_action(device, &action); if (r < 0) return log_device_warning_errno(device, r, "Failed to get udev action, ignoring: %m"); r = sd_device_get_subsystem(device, &s); if (r < 0) return log_device_warning_errno(device, r, "Failed to get subsystem, ignoring: %m"); if (streq(s, "net")) r = manager_udev_process_link(m, device, action); else if (streq(s, "ieee80211")) r = manager_udev_process_wiphy(m, device, action); else if (streq(s, "rfkill")) r = manager_udev_process_rfkill(m, device, action); else { log_device_debug(device, "Received device with unexpected subsystem \"%s\", ignoring.", s); return 0; } if (r < 0) log_device_warning_errno(device, r, "Failed to process \"%s\" uevent, ignoring: %m", device_action_to_string(action)); 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 (!udev_available()) 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 for net subsystem: %m"); r = sd_device_monitor_filter_add_match_subsystem_devtype(m->device_monitor, "ieee80211", NULL); if (r < 0) return log_error_errno(r, "Could not add device monitor filter for ieee80211 subsystem: %m"); r = sd_device_monitor_filter_add_match_subsystem_devtype(m->device_monitor, "rfkill", NULL); if (r < 0) return log_error_errno(r, "Could not add device monitor filter for rfkill subsystem: %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_process_uevent, m); if (r < 0) return log_error_errno(r, "Failed to start device monitor: %m"); return 0; } static int manager_listen_fds(Manager *m, int *ret_rtnl_fd) { _cleanup_strv_free_ char **names = NULL; int n, rtnl_fd = -EBADF; assert(m); assert(ret_rtnl_fd); n = sd_listen_fds_with_names(/* unset_environment = */ true, &names); if (n < 0) return n; if (strv_length(names) != (size_t) n) return -EINVAL; for (int i = 0; i < n; i++) { int fd = i + SD_LISTEN_FDS_START; if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) { if (rtnl_fd >= 0) { log_debug("Received multiple netlink socket, ignoring."); safe_close(fd); continue; } rtnl_fd = fd; continue; } if (manager_add_tuntap_fd(m, fd, names[i]) >= 0) continue; if (m->test_mode) safe_close(fd); else close_and_notify_warn(fd, names[i]); } *ret_rtnl_fd = rtnl_fd; return 0; } 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_increase_rxbuf(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; r = genl_add_match(m->genl, NULL, NL80211_GENL_NAME, NL80211_MULTICAST_GROUP_CONFIG, 0, &manager_genl_process_nl80211_config, NULL, m, "network-genl_process_nl80211_config"); if (r < 0 && r != -EOPNOTSUPP) return r; r = genl_add_match(m->genl, NULL, NL80211_GENL_NAME, NL80211_MULTICAST_GROUP_MLME, 0, &manager_genl_process_nl80211_mlme, NULL, m, "network-genl_process_nl80211_mlme"); if (r < 0 && r != -EOPNOTSUPP) return r; return 0; } static int manager_setup_rtnl_filter(Manager *manager) { struct sock_filter filter[] = { /* Check the packet length. */ BPF_STMT(BPF_LD + BPF_W + BPF_LEN, 0), /* A <- packet length */ BPF_JUMP(BPF_JMP + BPF_JGE + BPF_K, sizeof(struct nlmsghdr), 1, 0), /* A (packet length) >= sizeof(struct nlmsghdr) ? */ BPF_STMT(BPF_RET + BPF_K, 0), /* reject */ /* Always accept multipart message. */ BPF_STMT(BPF_LD + BPF_H + BPF_ABS, offsetof(struct nlmsghdr, nlmsg_flags)), /* A <- message flags */ BPF_JUMP(BPF_JMP + BPF_JSET + BPF_K, htobe16(NLM_F_MULTI), 0, 1), /* message flags has NLM_F_MULTI ? */ BPF_STMT(BPF_RET + BPF_K, UINT32_MAX), /* accept */ /* Accept all message types except for RTM_NEWNEIGH or RTM_DELNEIGH. */ BPF_STMT(BPF_LD + BPF_H + BPF_ABS, offsetof(struct nlmsghdr, nlmsg_type)), /* A <- message type */ BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, htobe16(RTM_NEWNEIGH), 2, 0), /* message type == RTM_NEWNEIGH ? */ BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, htobe16(RTM_DELNEIGH), 1, 0), /* message type == RTM_DELNEIGH ? */ BPF_STMT(BPF_RET + BPF_K, UINT32_MAX), /* accept */ /* Check the packet length. */ BPF_STMT(BPF_LD + BPF_W + BPF_LEN, 0), /* A <- packet length */ BPF_JUMP(BPF_JMP + BPF_JGE + BPF_K, sizeof(struct nlmsghdr) + sizeof(struct ndmsg), 1, 0), /* packet length >= sizeof(struct nlmsghdr) + sizeof(struct ndmsg) ? */ BPF_STMT(BPF_RET + BPF_K, 0), /* reject */ /* Reject the message when the neighbor state does not have NUD_PERMANENT flag. */ BPF_STMT(BPF_LD + BPF_H + BPF_ABS, sizeof(struct nlmsghdr) + offsetof(struct ndmsg, ndm_state)), /* A <- neighbor state */ BPF_JUMP(BPF_JMP + BPF_JSET + BPF_K, htobe16(NUD_PERMANENT), 1, 0), /* neighbor state has NUD_PERMANENT ? */ BPF_STMT(BPF_RET + BPF_K, 0), /* reject */ BPF_STMT(BPF_RET + BPF_K, UINT32_MAX), /* accept */ }; assert(manager); assert(manager->rtnl); return sd_netlink_attach_filter(manager->rtnl, ELEMENTSOF(filter), filter); } static int manager_connect_rtnl(Manager *m, int fd) { _unused_ _cleanup_close_ int fd_close = fd; int r; assert(m); /* This takes input fd. */ if (fd < 0) r = sd_netlink_open(&m->rtnl); else r = sd_netlink_open_fd(&m->rtnl, fd); if (r < 0) return r; TAKE_FD(fd_close); /* 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_increase_rxbuf(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_NEWQDISC, &manager_rtnl_process_qdisc, NULL, m, "network-rtnl_process_qdisc"); if (r < 0) return r; r = netlink_add_match(m->rtnl, NULL, RTM_DELQDISC, &manager_rtnl_process_qdisc, NULL, m, "network-rtnl_process_qdisc"); if (r < 0) return r; r = netlink_add_match(m->rtnl, NULL, RTM_NEWTCLASS, &manager_rtnl_process_tclass, NULL, m, "network-rtnl_process_tclass"); if (r < 0) return r; r = netlink_add_match(m->rtnl, NULL, RTM_DELTCLASS, &manager_rtnl_process_tclass, NULL, m, "network-rtnl_process_tclass"); 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 manager_setup_rtnl_filter(m); } static int manager_dirty_handler(sd_event_source *s, void *userdata) { Manager *m = ASSERT_PTR(userdata); Link *link; int r; if (m->dirty) { r = manager_save(m); if (r < 0) log_warning_errno(r, "Failed to update state file %s, ignoring: %m", m->state_file); } SET_FOREACH(link, m->dirty_links) { r = link_save_and_clean(link); if (r < 0) log_link_warning_errno(link, r, "Failed to update link state file %s, ignoring: %m", link->state_file); } return 1; } static int signal_terminate_callback(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { Manager *m = ASSERT_PTR(userdata); 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 = ASSERT_PTR(userdata); m->restarting = true; log_debug("Restart operation initiated."); return sd_event_exit(sd_event_source_get_event(s), 0); } static int signal_reload_callback(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { Manager *m = ASSERT_PTR(userdata); manager_reload(m); return 0; } static int manager_set_keep_configuration(Manager *m) { int r; assert(m); if (in_initrd()) { log_debug("Running in initrd, keep DHCPv4 addresses on stopping networkd by default."); m->keep_configuration = KEEP_CONFIGURATION_DHCP_ON_STOP; return 0; } r = path_is_network_fs("/"); if (r < 0) return log_error_errno(r, "Failed to detect if root is network filesystem: %m"); if (r == 0) { m->keep_configuration = _KEEP_CONFIGURATION_INVALID; return 0; } log_debug("Running on network filesystem, enabling KeepConfiguration= by default."); m->keep_configuration = KEEP_CONFIGURATION_YES; return 0; } int manager_setup(Manager *m) { _cleanup_close_ int rtnl_fd = -EBADF; int r; assert(m); r = sd_event_default(&m->event); if (r < 0) return r; (void) sd_event_set_watchdog(m->event, true); (void) sd_event_add_signal(m->event, NULL, SIGTERM | SD_EVENT_SIGNAL_PROCMASK, signal_terminate_callback, m); (void) sd_event_add_signal(m->event, NULL, SIGINT | SD_EVENT_SIGNAL_PROCMASK, signal_terminate_callback, m); (void) sd_event_add_signal(m->event, NULL, SIGUSR2 | SD_EVENT_SIGNAL_PROCMASK, signal_restart_callback, m); (void) sd_event_add_signal(m->event, NULL, SIGHUP | SD_EVENT_SIGNAL_PROCMASK, signal_reload_callback, m); (void) sd_event_add_signal(m->event, NULL, (SIGRTMIN+18) | SD_EVENT_SIGNAL_PROCMASK, sigrtmin18_handler, NULL); r = sd_event_add_memory_pressure(m->event, NULL, NULL, NULL); if (r < 0) log_debug_errno(r, "Failed allocate memory pressure event source, ignoring: %m"); r = sd_event_add_post(m->event, NULL, manager_dirty_handler, m); if (r < 0) return r; r = sd_event_add_post(m->event, NULL, manager_process_requests, m); if (r < 0) return r; r = manager_listen_fds(m, &rtnl_fd); if (r < 0) return r; r = manager_connect_rtnl(m, TAKE_FD(rtnl_fd)); if (r < 0) return r; r = manager_connect_genl(m); if (r < 0) return r; if (m->test_mode) return 0; r = manager_connect_bus(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; r = manager_set_keep_configuration(m); if (r < 0) return r; m->state_file = strdup("/run/systemd/netif/state"); if (!m->state_file) return -ENOMEM; return 0; } int manager_new(Manager **ret, bool test_mode) { _cleanup_(manager_freep) Manager *m = NULL; m = new(Manager, 1); if (!m) return -ENOMEM; *m = (Manager) { .keep_configuration = _KEEP_CONFIGURATION_INVALID, .ipv6_privacy_extensions = IPV6_PRIVACY_EXTENSIONS_NO, .test_mode = test_mode, .speed_meter_interval_usec = SPEED_METER_DEFAULT_TIME_INTERVAL, .online_state = _LINK_ONLINE_STATE_INVALID, .manage_foreign_routes = true, .manage_foreign_rules = true, .ethtool_fd = -EBADF, .dhcp_duid.type = DUID_TYPE_EN, .dhcp6_duid.type = DUID_TYPE_EN, .duid_product_uuid.type = DUID_TYPE_UUID, }; *ret = TAKE_PTR(m); return 0; } Manager* manager_free(Manager *m) { Link *link; if (!m) return NULL; free(m->state_file); HASHMAP_FOREACH(link, m->links_by_index) (void) link_stop_engines(link, true); m->request_queue = ordered_set_free(m->request_queue); m->dirty_links = set_free_with_destructor(m->dirty_links, link_unref); m->new_wlan_ifindices = set_free(m->new_wlan_ifindices); m->links_by_name = hashmap_free(m->links_by_name); m->links_by_hw_addr = hashmap_free(m->links_by_hw_addr); m->links_by_dhcp_pd_subnet_prefix = hashmap_free(m->links_by_dhcp_pd_subnet_prefix); m->links_by_index = hashmap_free_with_destructor(m->links_by_index, link_unref); m->dhcp_pd_subnet_ids = set_free(m->dhcp_pd_subnet_ids); m->networks = ordered_hashmap_free_with_destructor(m->networks, network_unref); m->netdevs = hashmap_free_with_destructor(m->netdevs, netdev_unref); m->tuntap_fds_by_name = hashmap_free(m->tuntap_fds_by_name); m->wiphy_by_name = hashmap_free(m->wiphy_by_name); m->wiphy_by_index = hashmap_free_with_destructor(m->wiphy_by_index, wiphy_free); ordered_set_free_free(m->address_pools); hashmap_free(m->route_table_names_by_number); hashmap_free(m->route_table_numbers_by_name); set_free(m->rules); 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); m->nexthops = set_free(m->nexthops); m->nexthops_by_id = hashmap_free(m->nexthops_by_id); 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); return mfree(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. */ r = manager_save(m); if (r < 0) log_warning_errno(r, "Failed to update state file %s, ignoring: %m", m->state_file); HASHMAP_FOREACH(link, m->links_by_index) { r = link_save_and_clean(link); if (r < 0) log_link_warning_errno(link, r, "Failed to update link state file %s, ignoring: %m", link->state_file); } return 0; } int manager_load_config(Manager *m) { int r; r = netdev_load(m, false); if (r < 0) return r; manager_clear_unmanaged_tuntap_fds(m); r = network_load(m, &m->networks); if (r < 0) return r; return manager_build_dhcp_pd_subnet_ids(m); } int manager_enumerate_internal( Manager *m, sd_netlink *nl, sd_netlink_message *req, int (*process)(sd_netlink *, sd_netlink_message *, Manager *)) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *reply = NULL; int r; assert(m); assert(nl); assert(req); assert(process); r = sd_netlink_message_set_request_dump(req, true); if (r < 0) return r; r = sd_netlink_call(nl, req, 0, &reply); if (r < 0) return r; m->enumerating = true; for (sd_netlink_message *reply_one = reply; reply_one; reply_one = sd_netlink_message_next(reply_one)) RET_GATHER(r, process(nl, reply_one, m)); 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, m->rtnl, req, manager_rtnl_process_link); } static int manager_enumerate_qdisc(Manager *m) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; int r; assert(m); assert(m->rtnl); r = sd_rtnl_message_new_traffic_control(m->rtnl, &req, RTM_GETQDISC, 0, 0, 0); if (r < 0) return r; return manager_enumerate_internal(m, m->rtnl, req, manager_rtnl_process_qdisc); } static int manager_enumerate_tclass(Manager *m) { Link *link; int r = 0; assert(m); assert(m->rtnl); /* TC class can be enumerated only per link. See tc_dump_tclass() in net/sched/sched_api.c. */ HASHMAP_FOREACH(link, m->links_by_index) RET_GATHER(r, link_enumerate_tclass(link, 0)); return r; } 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, m->rtnl, req, manager_rtnl_process_address); } 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, m->rtnl, req, manager_rtnl_process_neighbor); } 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, m->rtnl, req, manager_rtnl_process_route); } static int manager_enumerate_rules(Manager *m) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; int r; assert(m); assert(m->rtnl); if (!m->manage_foreign_rules) return 0; r = sd_rtnl_message_new_routing_policy_rule(m->rtnl, &req, RTM_GETRULE, 0); if (r < 0) return r; return manager_enumerate_internal(m, m->rtnl, req, manager_rtnl_process_rule); } 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, m->rtnl, req, manager_rtnl_process_nexthop); } static int manager_enumerate_nl80211_wiphy(Manager *m) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; int r; assert(m); assert(m->genl); r = sd_genl_message_new(m->genl, NL80211_GENL_NAME, NL80211_CMD_GET_WIPHY, &req); if (r < 0) return r; return manager_enumerate_internal(m, m->genl, req, manager_genl_process_nl80211_wiphy); } static int manager_enumerate_nl80211_config(Manager *m) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; int r; assert(m); assert(m->genl); r = sd_genl_message_new(m->genl, NL80211_GENL_NAME, NL80211_CMD_GET_INTERFACE, &req); if (r < 0) return r; return manager_enumerate_internal(m, m->genl, req, manager_genl_process_nl80211_config); } static int manager_enumerate_nl80211_mlme(Manager *m) { Link *link; int r; assert(m); assert(m->genl); HASHMAP_FOREACH(link, m->links_by_index) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; if (link->wlan_iftype != NL80211_IFTYPE_STATION) continue; r = sd_genl_message_new(m->genl, NL80211_GENL_NAME, NL80211_CMD_GET_STATION, &req); if (r < 0) return r; r = sd_netlink_message_append_u32(req, NL80211_ATTR_IFINDEX, link->ifindex); if (r < 0) return r; r = manager_enumerate_internal(m, m->genl, req, manager_genl_process_nl80211_mlme); if (r < 0) return r; } return 0; } 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_qdisc(m); if (r == -EOPNOTSUPP) log_debug_errno(r, "Could not enumerate QDiscs, ignoring: %m"); else if (r < 0) return log_error_errno(r, "Could not enumerate QDisc: %m"); r = manager_enumerate_tclass(m); if (r == -EOPNOTSUPP) log_debug_errno(r, "Could not enumerate TClasses, ignoring: %m"); else if (r < 0) return log_error_errno(r, "Could not enumerate TClass: %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"); /* NextHop support is added in kernel v5.3 (65ee00a9409f751188a8cdc0988167858eb4a536), * and older kernels return -EOPNOTSUPP, or -EINVAL if SELinux is enabled. */ r = manager_enumerate_nexthop(m); if (r == -EOPNOTSUPP || (r == -EINVAL && mac_selinux_enforcing())) log_debug_errno(r, "Could not enumerate nexthops, ignoring: %m"); else if (r < 0) return log_error_errno(r, "Could not enumerate nexthops: %m"); r = manager_enumerate_routes(m); if (r < 0) return log_error_errno(r, "Could not enumerate routes: %m"); /* If kernel is built with CONFIG_FIB_RULES=n, it returns -EOPNOTSUPP. */ r = manager_enumerate_rules(m); if (r == -EOPNOTSUPP) log_debug_errno(r, "Could not enumerate routing policy rules, ignoring: %m"); else if (r < 0) return log_error_errno(r, "Could not enumerate routing policy rules: %m"); r = manager_enumerate_nl80211_wiphy(m); if (r == -EOPNOTSUPP) log_debug_errno(r, "Could not enumerate wireless LAN phy, ignoring: %m"); else if (r < 0) return log_error_errno(r, "Could not enumerate wireless LAN phy: %m"); r = manager_enumerate_nl80211_config(m); if (r == -EOPNOTSUPP) log_debug_errno(r, "Could not enumerate wireless LAN interfaces, ignoring: %m"); else if (r < 0) return log_error_errno(r, "Could not enumerate wireless LAN interfaces: %m"); r = manager_enumerate_nl80211_mlme(m); if (r == -EOPNOTSUPP) log_debug_errno(r, "Could not enumerate wireless LAN stations, ignoring: %m"); else if (r < 0) return log_error_errno(r, "Could not enumerate wireless LAN stations: %m"); return 0; } 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)); r = free_and_strdup_warn(&m->dynamic_hostname, hostname); if (r < 0) return r; if (sd_bus_is_ready(m->bus) <= 0) { log_debug("Not connected to system bus, setting system hostname later."); return 0; } r = bus_call_method_async( m->bus, NULL, bus_hostname, "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); r = free_and_strdup_warn(&m->dynamic_timezone, tz); if (r < 0) return r; if (sd_bus_is_ready(m->bus) <= 0) { log_debug("Not connected to system bus, setting system timezone later."); return 0; } r = bus_call_method_async( m->bus, NULL, bus_timedate, "SetTimezone", set_timezone_handler, m, "sb", tz, false); if (r < 0) return log_error_errno(r, "Could not set timezone: %m"); return 0; } int manager_reload(Manager *m) { Link *link; int r; assert(m); (void) sd_notifyf(/* unset= */ false, "RELOADING=1\n" "STATUS=Reloading configuration...\n" "MONOTONIC_USEC=" USEC_FMT, now(CLOCK_MONOTONIC)); r = netdev_load(m, /* reload= */ true); if (r < 0) goto finish; r = network_reload(m); if (r < 0) goto finish; HASHMAP_FOREACH(link, m->links_by_index) { r = link_reconfigure(link, /* force = */ false); if (r < 0) goto finish; } r = 0; finish: (void) sd_notify(/* unset= */ false, NOTIFY_READY); return r; }