/* SPDX-License-Identifier: LGPL-2.1+ */ #include #include #include #include #include #include "sd-daemon.h" #include "sd-netlink.h" #include "alloc-util.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 "local-addresses.h" #include "netlink-util.h" #include "network-internal.h" #include "networkd-dhcp6.h" #include "networkd-link-bus.h" #include "networkd-manager-bus.h" #include "networkd-manager.h" #include "networkd-network-bus.h" #include "networkd-speed-meter.h" #include "ordered-set.h" #include "path-util.h" #include "set.h" #include "strv.h" #include "sysctl-util.h" #include "tmpfile-util.h" #include "udev-util.h" #include "virt.h" /* use 8 MB for receive socket kernel queue. */ #define RCVBUF_SIZE (8*1024*1024) static int setup_default_address_pool(Manager *m) { AddressPool *p; int r; assert(m); /* Add in the well-known private address ranges. */ r = address_pool_new_from_string(m, &p, AF_INET6, "fd00::", 8); if (r < 0) return r; r = address_pool_new_from_string(m, &p, AF_INET, "10.0.0.0", 8); if (r < 0) return r; r = address_pool_new_from_string(m, &p, AF_INET, "172.16.0.0", 12); if (r < 0) return r; r = address_pool_new_from_string(m, &p, AF_INET, "192.168.0.0", 16); if (r < 0) return r; return 0; } static int manager_reset_all(Manager *m) { Link *link; Iterator i; int r; assert(m); HASHMAP_FOREACH(link, m->links, i) { 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) { log_debug_errno(r, "Failed to parse PrepareForSleep signal: %m"); 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_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 = 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; } if (!IN_SET(action, DEVICE_ACTION_ADD, DEVICE_ACTION_CHANGE, DEVICE_ACTION_MOVE)) { log_device_debug(device, "Ignoring udev %s event for device.", device_action_to_string(action)); return 0; } r = sd_device_get_ifindex(device, &ifindex); if (r < 0) { log_device_debug_errno(device, r, "Ignoring udev ADD event for device without ifindex or with invalid ifindex: %m"); 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: %m"); 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 (detect_container() > 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_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; } int manager_rtnl_process_route(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) { _cleanup_(route_freep) Route *tmp = NULL; Route *route = NULL; Manager *m = userdata; Link *link = NULL; uint32_t ifindex; uint16_t type; unsigned char table; int r; assert(rtnl); assert(message); assert(m); if (sd_netlink_message_is_error(message)) { r = sd_netlink_message_get_errno(message); if (r < 0) log_warning_errno(r, "rtnl: failed to receive route message, ignoring: %m"); 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_NEWROUTE, RTM_DELROUTE)) { log_warning("rtnl: received unexpected message type %u when processing route, ignoring.", type); return 0; } r = sd_netlink_message_read_u32(message, RTA_OIF, &ifindex); if (r == -ENODATA) { log_debug("rtnl: received route message without ifindex, ignoring"); return 0; } else if (r < 0) { log_warning_errno(r, "rtnl: could not get ifindex from route message, ignoring: %m"); return 0; } else if (ifindex <= 0) { log_warning("rtnl: received route message with invalid ifindex %d, ignoring.", ifindex); return 0; } r = link_get(m, ifindex, &link); if (r < 0 || !link) { /* when enumerating we might be out of sync, but we will * get the route again, so just ignore it */ if (!m->enumerating) log_warning("rtnl: received route message for link (%d) we do not know about, ignoring", ifindex); return 0; } r = route_new(&tmp); if (r < 0) return log_oom(); r = sd_rtnl_message_route_get_family(message, &tmp->family); if (r < 0 || !IN_SET(tmp->family, AF_INET, AF_INET6)) { log_link_warning(link, "rtnl: received route message with invalid family, ignoring"); return 0; } r = sd_rtnl_message_route_get_protocol(message, &tmp->protocol); if (r < 0) { log_warning_errno(r, "rtnl: received route message with invalid route protocol: %m"); return 0; } switch (tmp->family) { case AF_INET: r = sd_netlink_message_read_in_addr(message, RTA_DST, &tmp->dst.in); if (r < 0 && r != -ENODATA) { log_link_warning_errno(link, r, "rtnl: received route message without valid destination, ignoring: %m"); return 0; } r = sd_netlink_message_read_in_addr(message, RTA_GATEWAY, &tmp->gw.in); if (r < 0 && r != -ENODATA) { log_link_warning_errno(link, r, "rtnl: received route message without valid gateway, ignoring: %m"); return 0; } r = sd_netlink_message_read_in_addr(message, RTA_SRC, &tmp->src.in); if (r < 0 && r != -ENODATA) { log_link_warning_errno(link, r, "rtnl: received route message without valid source, ignoring: %m"); return 0; } r = sd_netlink_message_read_in_addr(message, RTA_PREFSRC, &tmp->prefsrc.in); if (r < 0 && r != -ENODATA) { log_link_warning_errno(link, r, "rtnl: received route message without valid preferred source, ignoring: %m"); return 0; } break; case AF_INET6: r = sd_netlink_message_read_in6_addr(message, RTA_DST, &tmp->dst.in6); if (r < 0 && r != -ENODATA) { log_link_warning_errno(link, r, "rtnl: received route message without valid destination, ignoring: %m"); return 0; } r = sd_netlink_message_read_in6_addr(message, RTA_GATEWAY, &tmp->gw.in6); if (r < 0 && r != -ENODATA) { log_link_warning_errno(link, r, "rtnl: received route message without valid gateway, ignoring: %m"); return 0; } r = sd_netlink_message_read_in6_addr(message, RTA_SRC, &tmp->src.in6); if (r < 0 && r != -ENODATA) { log_link_warning_errno(link, r, "rtnl: received route message without valid source, ignoring: %m"); return 0; } r = sd_netlink_message_read_in6_addr(message, RTA_PREFSRC, &tmp->prefsrc.in6); if (r < 0 && r != -ENODATA) { log_link_warning_errno(link, r, "rtnl: received route message without valid preferred source, ignoring: %m"); return 0; } break; default: assert_not_reached("Received route message with unsupported address family"); return 0; } r = sd_rtnl_message_route_get_dst_prefixlen(message, &tmp->dst_prefixlen); if (r < 0) { log_link_warning_errno(link, r, "rtnl: received route message with invalid destination prefixlen, ignoring: %m"); return 0; } r = sd_rtnl_message_route_get_src_prefixlen(message, &tmp->src_prefixlen); if (r < 0) { log_link_warning_errno(link, r, "rtnl: received route message with invalid source prefixlen, ignoring: %m"); return 0; } r = sd_rtnl_message_route_get_scope(message, &tmp->scope); if (r < 0) { log_link_warning_errno(link, r, "rtnl: received route message with invalid scope, ignoring: %m"); return 0; } r = sd_rtnl_message_route_get_tos(message, &tmp->tos); if (r < 0) { log_link_warning_errno(link, r, "rtnl: received route message with invalid tos, ignoring: %m"); return 0; } r = sd_rtnl_message_route_get_type(message, &tmp->type); if (r < 0) { log_link_warning_errno(link, r, "rtnl: received route message with invalid type, ignoring: %m"); return 0; } r = sd_rtnl_message_route_get_table(message, &table); if (r < 0) { log_link_warning_errno(link, r, "rtnl: received route message with invalid table, ignoring: %m"); return 0; } tmp->table = table; r = sd_netlink_message_read_u32(message, RTA_PRIORITY, &tmp->priority); if (r < 0 && r != -ENODATA) { log_link_warning_errno(link, r, "rtnl: received route message with invalid priority, ignoring: %m"); return 0; } r = sd_netlink_message_enter_container(message, RTA_METRICS); if (r < 0 && r != -ENODATA) { log_link_error_errno(link, r, "rtnl: Could not enter RTA_METRICS container: %m"); return 0; } if (r >= 0) { r = sd_netlink_message_read_u32(message, RTAX_INITCWND, &tmp->initcwnd); if (r < 0 && r != -ENODATA) { log_link_warning_errno(link, r, "rtnl: received route message with invalid initcwnd, ignoring: %m"); return 0; } r = sd_netlink_message_read_u32(message, RTAX_INITRWND, &tmp->initrwnd); if (r < 0 && r != -ENODATA) { log_link_warning_errno(link, r, "rtnl: received route message with invalid initrwnd, ignoring: %m"); return 0; } r = sd_netlink_message_exit_container(message); if (r < 0) { log_link_error_errno(link, r, "rtnl: Could not exit from RTA_METRICS container: %m"); return 0; } } (void) route_get(link, tmp, &route); if (DEBUG_LOGGING) { _cleanup_free_ char *buf_dst = NULL, *buf_dst_prefixlen = NULL, *buf_src = NULL, *buf_gw = NULL, *buf_prefsrc = NULL; char buf_scope[ROUTE_SCOPE_STR_MAX], buf_table[ROUTE_TABLE_STR_MAX], buf_protocol[ROUTE_PROTOCOL_STR_MAX]; if (!in_addr_is_null(tmp->family, &tmp->dst)) { (void) in_addr_to_string(tmp->family, &tmp->dst, &buf_dst); (void) asprintf(&buf_dst_prefixlen, "/%u", tmp->dst_prefixlen); } if (!in_addr_is_null(tmp->family, &tmp->src)) (void) in_addr_to_string(tmp->family, &tmp->src, &buf_src); if (!in_addr_is_null(tmp->family, &tmp->gw)) (void) in_addr_to_string(tmp->family, &tmp->gw, &buf_gw); if (!in_addr_is_null(tmp->family, &tmp->prefsrc)) (void) in_addr_to_string(tmp->family, &tmp->prefsrc, &buf_prefsrc); log_link_debug(link, "%s route: dst: %s%s, src: %s, gw: %s, prefsrc: %s, scope: %s, table: %s, proto: %s, type: %s", type == RTM_DELROUTE ? "Forgetting" : route ? "Received remembered" : "Remembering", strna(buf_dst), strempty(buf_dst_prefixlen), strna(buf_src), strna(buf_gw), strna(buf_prefsrc), format_route_scope(tmp->scope, buf_scope, sizeof buf_scope), format_route_table(tmp->table, buf_table, sizeof buf_table), format_route_protocol(tmp->protocol, buf_protocol, sizeof buf_protocol), strna(route_type_to_string(tmp->type))); } switch (type) { case RTM_NEWROUTE: if (!route) { /* A route appeared that we did not request */ r = route_add_foreign(link, tmp, &route); if (r < 0) { log_link_warning_errno(link, r, "Failed to remember foreign route, ignoring: %m"); return 0; } } break; case RTM_DELROUTE: route_free(route); break; default: assert_not_reached("Received route message with invalid RTNL message type"); } return 1; } static int manager_rtnl_process_neighbor_lladdr(sd_netlink_message *message, union lladdr_union *lladdr, size_t *size, char **str) { int r; assert(message); assert(lladdr); assert(size); assert(str); *str = NULL; r = sd_netlink_message_read(message, NDA_LLADDR, sizeof(lladdr->ip.in6), &lladdr->ip.in6); if (r >= 0) { *size = sizeof(lladdr->ip.in6); if (in_addr_to_string(AF_INET6, &lladdr->ip, str) < 0) log_warning_errno(r, "Could not print lower address: %m"); return r; } r = sd_netlink_message_read(message, NDA_LLADDR, sizeof(lladdr->mac), &lladdr->mac); if (r >= 0) { *size = sizeof(lladdr->mac); *str = new(char, ETHER_ADDR_TO_STRING_MAX); if (!*str) { log_oom(); return r; } ether_addr_to_string(&lladdr->mac, *str); return r; } r = sd_netlink_message_read(message, NDA_LLADDR, sizeof(lladdr->ip.in), &lladdr->ip.in); if (r >= 0) { *size = sizeof(lladdr->ip.in); if (in_addr_to_string(AF_INET, &lladdr->ip, str) < 0) log_warning_errno(r, "Could not print lower address: %m"); return r; } return r; } int manager_rtnl_process_neighbor(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) { Manager *m = userdata; Link *link = NULL; Neighbor *neighbor = NULL; int ifindex, family, r; uint16_t type, state; union in_addr_union in_addr = IN_ADDR_NULL; _cleanup_free_ char *addr_str = NULL; union lladdr_union lladdr; size_t lladdr_size = 0; _cleanup_free_ char *lladdr_str = NULL; assert(rtnl); assert(message); assert(m); if (sd_netlink_message_is_error(message)) { r = sd_netlink_message_get_errno(message); if (r < 0) log_warning_errno(r, "rtnl: failed to receive neighbor message, ignoring: %m"); 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_NEWNEIGH, RTM_DELNEIGH)) { log_warning("rtnl: received unexpected message type %u when processing neighbor, ignoring.", type); return 0; } r = sd_rtnl_message_neigh_get_state(message, &state); if (r < 0) { log_link_warning_errno(link, r, "rtnl: received neighbor message with invalid state, ignoring: %m"); return 0; } else if (!FLAGS_SET(state, NUD_PERMANENT)) { log_debug("rtnl: received non-static neighbor, ignoring."); return 0; } r = sd_rtnl_message_neigh_get_ifindex(message, &ifindex); if (r < 0) { log_warning_errno(r, "rtnl: could not get ifindex from message, ignoring: %m"); return 0; } else if (ifindex <= 0) { log_warning("rtnl: received neighbor message with invalid ifindex %d, ignoring.", ifindex); return 0; } r = link_get(m, ifindex, &link); if (r < 0 || !link) { /* when enumerating we might be out of sync, but we will get the neighbor again, so just * ignore it */ if (!m->enumerating) log_warning("rtnl: received neighbor for link '%d' we don't know about, ignoring.", ifindex); return 0; } r = sd_rtnl_message_neigh_get_family(message, &family); if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) { log_link_warning(link, "rtnl: received neighbor message with invalid family, ignoring."); return 0; } switch (family) { case AF_INET: r = sd_netlink_message_read_in_addr(message, NDA_DST, &in_addr.in); if (r < 0) { log_link_warning_errno(link, r, "rtnl: received neighbor message without valid address, ignoring: %m"); return 0; } break; case AF_INET6: r = sd_netlink_message_read_in6_addr(message, NDA_DST, &in_addr.in6); if (r < 0) { log_link_warning_errno(link, r, "rtnl: received neighbor message without valid address, ignoring: %m"); return 0; } break; default: assert_not_reached("Received unsupported address family"); } if (in_addr_to_string(family, &in_addr, &addr_str) < 0) log_link_warning_errno(link, r, "Could not print address: %m"); r = manager_rtnl_process_neighbor_lladdr(message, &lladdr, &lladdr_size, &lladdr_str); if (r < 0) { log_link_warning_errno(link, r, "rtnl: received neighbor message with invalid lladdr, ignoring: %m"); return 0; } (void) neighbor_get(link, family, &in_addr, &lladdr, lladdr_size, &neighbor); switch (type) { case RTM_NEWNEIGH: if (neighbor) log_link_debug(link, "Remembering neighbor: %s->%s", strnull(addr_str), strnull(lladdr_str)); else { /* A neighbor appeared that we did not request */ r = neighbor_add_foreign(link, family, &in_addr, &lladdr, lladdr_size, &neighbor); if (r < 0) { log_link_warning_errno(link, r, "Failed to remember foreign neighbor %s->%s, ignoring: %m", strnull(addr_str), strnull(lladdr_str)); return 0; } else log_link_debug(link, "Remembering foreign neighbor: %s->%s", strnull(addr_str), strnull(lladdr_str)); } break; case RTM_DELNEIGH: if (neighbor) { log_link_debug(link, "Forgetting neighbor: %s->%s", strnull(addr_str), strnull(lladdr_str)); (void) neighbor_free(neighbor); } else log_link_info(link, "Kernel removed a neighbor we don't remember: %s->%s, ignoring.", strnull(addr_str), strnull(lladdr_str)); break; default: assert_not_reached("Received invalid RTNL message type"); } return 1; } int manager_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) { _cleanup_free_ char *buf = NULL; Manager *m = userdata; Link *link = NULL; uint16_t type; unsigned char flags, prefixlen, scope; union in_addr_union in_addr = IN_ADDR_NULL; struct ifa_cacheinfo cinfo; Address *address = NULL; char valid_buf[FORMAT_TIMESPAN_MAX]; const char *valid_str = NULL; int ifindex, family, r; assert(rtnl); assert(message); assert(m); if (sd_netlink_message_is_error(message)) { r = sd_netlink_message_get_errno(message); if (r < 0) log_warning_errno(r, "rtnl: failed to receive address message, ignoring: %m"); 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_NEWADDR, RTM_DELADDR)) { log_warning("rtnl: received unexpected message type %u when processing address, ignoring.", type); return 0; } r = sd_rtnl_message_addr_get_ifindex(message, &ifindex); if (r < 0) { log_warning_errno(r, "rtnl: could not get ifindex from message, ignoring: %m"); return 0; } else if (ifindex <= 0) { log_warning("rtnl: received address message with invalid ifindex %d, ignoring.", ifindex); return 0; } r = link_get(m, ifindex, &link); if (r < 0 || !link) { /* when enumerating we might be out of sync, but we will get the address again, so just * ignore it */ if (!m->enumerating) log_warning("rtnl: received address for link '%d' we don't know about, ignoring.", ifindex); return 0; } r = sd_rtnl_message_addr_get_family(message, &family); if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) { log_link_warning(link, "rtnl: received address message with invalid family, ignoring."); return 0; } r = sd_rtnl_message_addr_get_prefixlen(message, &prefixlen); if (r < 0) { log_link_warning_errno(link, r, "rtnl: received address message with invalid prefixlen, ignoring: %m"); return 0; } r = sd_rtnl_message_addr_get_scope(message, &scope); if (r < 0) { log_link_warning_errno(link, r, "rtnl: received address message with invalid scope, ignoring: %m"); return 0; } r = sd_rtnl_message_addr_get_flags(message, &flags); if (r < 0) { log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m"); return 0; } switch (family) { case AF_INET: r = sd_netlink_message_read_in_addr(message, IFA_LOCAL, &in_addr.in); if (r < 0) { log_link_warning_errno(link, r, "rtnl: received address message without valid address, ignoring: %m"); return 0; } break; case AF_INET6: r = sd_netlink_message_read_in6_addr(message, IFA_ADDRESS, &in_addr.in6); if (r < 0) { log_link_warning_errno(link, r, "rtnl: received address message without valid address, ignoring: %m"); return 0; } break; default: assert_not_reached("Received unsupported address family"); } r = in_addr_to_string(family, &in_addr, &buf); if (r < 0) log_link_warning_errno(link, r, "Could not print address: %m"); r = sd_netlink_message_read_cache_info(message, IFA_CACHEINFO, &cinfo); if (r < 0 && r != -ENODATA) { log_link_warning_errno(link, r, "rtnl: cannot get IFA_CACHEINFO attribute, ignoring: %m"); return 0; } else if (r >= 0 && cinfo.ifa_valid != CACHE_INFO_INFINITY_LIFE_TIME) valid_str = format_timespan(valid_buf, FORMAT_TIMESPAN_MAX, cinfo.ifa_valid * USEC_PER_SEC, USEC_PER_SEC); (void) address_get(link, family, &in_addr, prefixlen, &address); switch (type) { case RTM_NEWADDR: if (address) log_link_debug(link, "Remembering updated address: %s/%u (valid %s%s)", strnull(buf), prefixlen, valid_str ? "for " : "forever", strempty(valid_str)); else { /* An address appeared that we did not request */ r = address_add_foreign(link, family, &in_addr, prefixlen, &address); if (r < 0) { log_link_warning_errno(link, r, "Failed to remember foreign address %s/%u, ignoring: %m", strnull(buf), prefixlen); return 0; } else log_link_debug(link, "Remembering foreign address: %s/%u (valid %s%s)", strnull(buf), prefixlen, valid_str ? "for " : "forever", strempty(valid_str)); } /* address_update() logs internally, so we don't need to. */ (void) address_update(address, flags, scope, &cinfo); break; case RTM_DELADDR: if (address) { log_link_debug(link, "Forgetting address: %s/%u (valid %s%s)", strnull(buf), prefixlen, valid_str ? "for " : "forever", strempty(valid_str)); (void) address_drop(address); } else log_link_info(link, "Kernel removed an address we don't remember: %s/%u (valid %s%s), ignoring.", strnull(buf), prefixlen, valid_str ? "for " : "forever", strempty(valid_str)); break; default: assert_not_reached("Received invalid RTNL message type"); } return 1; } static int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) { Manager *m = userdata; 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_warning_errno(r, "rtnl: Could not receive link message, ignoring: %m"); 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; } int manager_rtnl_process_rule(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) { _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *tmp = NULL; _cleanup_free_ char *from = NULL, *to = NULL; RoutingPolicyRule *rule = NULL; const char *iif = NULL, *oif = NULL; Manager *m = userdata; unsigned flags; uint16_t type; int r; assert(rtnl); assert(message); assert(m); if (sd_netlink_message_is_error(message)) { r = sd_netlink_message_get_errno(message); if (r < 0) log_warning_errno(r, "rtnl: failed to receive rule message, ignoring: %m"); 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_NEWRULE, RTM_DELRULE)) { log_warning("rtnl: received unexpected message type %u when processing rule, ignoring.", type); return 0; } r = routing_policy_rule_new(&tmp); if (r < 0) { log_oom(); return 0; } r = sd_rtnl_message_get_family(message, &tmp->family); if (r < 0) { log_warning_errno(r, "rtnl: could not get rule family, ignoring: %m"); return 0; } else if (!IN_SET(tmp->family, AF_INET, AF_INET6)) { log_debug("rtnl: received rule message with invalid family %d, ignoring.", tmp->family); return 0; } switch (tmp->family) { case AF_INET: r = sd_netlink_message_read_in_addr(message, FRA_SRC, &tmp->from.in); if (r < 0 && r != -ENODATA) { log_warning_errno(r, "rtnl: could not get FRA_SRC attribute, ignoring: %m"); return 0; } else if (r >= 0) { r = sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(message, &tmp->from_prefixlen); if (r < 0) { log_warning_errno(r, "rtnl: received rule message without valid source prefix length, ignoring: %m"); return 0; } } r = sd_netlink_message_read_in_addr(message, FRA_DST, &tmp->to.in); if (r < 0 && r != -ENODATA) { log_warning_errno(r, "rtnl: could not get FRA_DST attribute, ignoring: %m"); return 0; } else if (r >= 0) { r = sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(message, &tmp->to_prefixlen); if (r < 0) { log_warning_errno(r, "rtnl: received rule message without valid destination prefix length, ignoring: %m"); return 0; } } break; case AF_INET6: r = sd_netlink_message_read_in6_addr(message, FRA_SRC, &tmp->from.in6); if (r < 0 && r != -ENODATA) { log_warning_errno(r, "rtnl: could not get FRA_SRC attribute, ignoring: %m"); return 0; } else if (r >= 0) { r = sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(message, &tmp->from_prefixlen); if (r < 0) { log_warning_errno(r, "rtnl: received rule message without valid source prefix length, ignoring: %m"); return 0; } } r = sd_netlink_message_read_in6_addr(message, FRA_DST, &tmp->to.in6); if (r < 0 && r != -ENODATA) { log_warning_errno(r, "rtnl: could not get FRA_DST attribute, ignoring: %m"); return 0; } else if (r >= 0) { r = sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(message, &tmp->to_prefixlen); if (r < 0) { log_warning_errno(r, "rtnl: received rule message without valid destination prefix length, ignoring: %m"); return 0; } } break; default: assert_not_reached("Received rule message with unsupported address family"); } if (tmp->from_prefixlen == 0 && tmp->to_prefixlen == 0) return 0; r = sd_rtnl_message_routing_policy_rule_get_flags(message, &flags); if (r < 0) { log_warning_errno(r, "rtnl: received rule message without valid flag, ignoring: %m"); return 0; } tmp->invert_rule = flags & FIB_RULE_INVERT; r = sd_netlink_message_read_u32(message, FRA_FWMARK, &tmp->fwmark); if (r < 0 && r != -ENODATA) { log_warning_errno(r, "rtnl: could not get FRA_FWMARK attribute, ignoring: %m"); return 0; } r = sd_netlink_message_read_u32(message, FRA_FWMASK, &tmp->fwmask); if (r < 0 && r != -ENODATA) { log_warning_errno(r, "rtnl: could not get FRA_FWMASK attribute, ignoring: %m"); return 0; } r = sd_netlink_message_read_u32(message, FRA_PRIORITY, &tmp->priority); if (r < 0 && r != -ENODATA) { log_warning_errno(r, "rtnl: could not get FRA_PRIORITY attribute, ignoring: %m"); return 0; } r = sd_netlink_message_read_u32(message, FRA_TABLE, &tmp->table); if (r < 0 && r != -ENODATA) { log_warning_errno(r, "rtnl: could not get FRA_TABLE attribute, ignoring: %m"); return 0; } r = sd_rtnl_message_routing_policy_rule_get_tos(message, &tmp->tos); if (r < 0 && r != -ENODATA) { log_warning_errno(r, "rtnl: could not get ip rule TOS, ignoring: %m"); return 0; } r = sd_netlink_message_read_string(message, FRA_IIFNAME, &iif); if (r < 0 && r != -ENODATA) { log_warning_errno(r, "rtnl: could not get FRA_IIFNAME attribute, ignoring: %m"); return 0; } r = free_and_strdup(&tmp->iif, iif); if (r < 0) return log_oom(); r = sd_netlink_message_read_string(message, FRA_OIFNAME, &oif); if (r < 0 && r != -ENODATA) { log_warning_errno(r, "rtnl: could not get FRA_OIFNAME attribute, ignoring: %m"); return 0; } r = free_and_strdup(&tmp->oif, oif); if (r < 0) return log_oom(); r = sd_netlink_message_read_u8(message, FRA_IP_PROTO, &tmp->protocol); if (r < 0 && r != -ENODATA) { log_warning_errno(r, "rtnl: could not get FRA_IP_PROTO attribute, ignoring: %m"); return 0; } r = sd_netlink_message_read(message, FRA_SPORT_RANGE, sizeof(tmp->sport), &tmp->sport); if (r < 0 && r != -ENODATA) { log_warning_errno(r, "rtnl: could not get FRA_SPORT_RANGE attribute, ignoring: %m"); return 0; } r = sd_netlink_message_read(message, FRA_DPORT_RANGE, sizeof(tmp->dport), &tmp->dport); if (r < 0 && r != -ENODATA) { log_warning_errno(r, "rtnl: could not get FRA_DPORT_RANGE attribute, ignoring: %m"); return 0; } (void) routing_policy_rule_get(m, tmp, &rule); if (DEBUG_LOGGING) { (void) in_addr_to_string(tmp->family, &tmp->from, &from); (void) in_addr_to_string(tmp->family, &tmp->to, &to); } switch (type) { case RTM_NEWRULE: if (!rule) { log_debug("Remembering foreign routing policy rule: %s/%u -> %s/%u, iif: %s, oif: %s, table: %u", from, tmp->from_prefixlen, to, tmp->to_prefixlen, strna(tmp->iif), strna(tmp->oif), tmp->table); r = routing_policy_rule_add_foreign(m, tmp, &rule); if (r < 0) { log_warning_errno(r, "Could not remember foreign rule, ignoring: %m"); return 0; } } break; case RTM_DELRULE: log_debug("Forgetting routing policy rule: %s/%u -> %s/%u, iif: %s, oif: %s, table: %u", from, tmp->from_prefixlen, to, tmp->to_prefixlen, strna(tmp->iif), strna(tmp->oif), tmp->table); routing_policy_rule_free(rule); break; default: assert_not_reached("Received 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) return r; 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; r = sd_netlink_inc_rcvbuf(m->rtnl, RCVBUF_SIZE); if (r < 0) return r; r = sd_netlink_attach_event(m->rtnl, m->event, 0); if (r < 0) return r; r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link"); if (r < 0) return r; r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link"); if (r < 0) return r; r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address"); if (r < 0) return r; r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address"); if (r < 0) return r; r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWNEIGH, &manager_rtnl_process_neighbor, NULL, m, "network-rtnl_process_neighbor"); if (r < 0) return r; r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELNEIGH, &manager_rtnl_process_neighbor, NULL, m, "network-rtnl_process_neighbor"); if (r < 0) return r; r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route"); if (r < 0) return r; r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route"); if (r < 0) return r; r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule"); if (r < 0) return r; r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule"); if (r < 0) return r; return 0; } static int ordered_set_put_in_addr_data(OrderedSet *s, const struct in_addr_data *address) { char *p; int r; assert(s); assert(address); r = in_addr_to_string(address->family, &address->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_in_addr_datav(OrderedSet *s, const struct in_addr_data *addresses, unsigned n) { int r, c = 0; unsigned i; assert(s); assert(addresses || n == 0); for (i = 0; i < n; i++) { r = ordered_set_put_in_addr_data(s, addresses+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, *search_domains = NULL, *route_domains = NULL; Link *link; Iterator i; _cleanup_free_ char *temp_path = NULL; _cleanup_strv_free_ char **p = NULL; _cleanup_fclose_ FILE *f = NULL; LinkOperationalState operstate = LINK_OPERSTATE_OFF; LinkCarrierState carrier_state = LINK_CARRIER_STATE_OFF; LinkAddressState address_state = LINK_ADDRESS_STATE_OFF; const char *operstate_str, *carrier_state_str, *address_state_str; 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; 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, i) { 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 */ r = ordered_set_put_in_addr_datav(dns, 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) { const struct in_addr *addresses; 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) { const struct in_addr *addresses; 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_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, "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; Iterator i; assert(m); if (m->dirty) manager_save(m); SET_FOREACH(link, m->dirty_links, i) if (link_save(link) >= 0) link_clean(link); return 1; } 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, }; 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; (void) sd_event_set_watchdog(m->event, true); (void) sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL); (void) sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL); 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 = setup_default_address_pool(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) { struct in6_addr *a; AddressPool *pool; Link *link; if (!m) return; free(m->state_file); while ((a = hashmap_first_key(m->dhcp6_prefixes))) (void) dhcp6_prefix_remove(m, a); m->dhcp6_prefixes = hashmap_free(m->dhcp6_prefixes); while ((link = hashmap_steal_first(m->links))) { if (link->dhcp6_client) (void) dhcp6_lease_pd_prefix_lost(link->dhcp6_client, link); (void) link_stop_clients(link, true); link_unref(link); } 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); while ((pool = m->address_pools)) address_pool_free(pool); /* 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_with_destructor(m->rules, routing_policy_rule_free); m->rules_foreign = set_free_with_destructor(m->rules_foreign, routing_policy_rule_free); set_free_with_destructor(m->rules_saved, routing_policy_rule_free); sd_netlink_unref(m->rtnl); sd_netlink_unref(m->genl); sd_resolve_unref(m->resolve); 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); free(m); } int manager_start(Manager *m) { Link *link; Iterator i; 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, i) 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); if (r < 0) return r; r = network_load(m); 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); } int manager_rtnl_enumerate_links(Manager *m) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL; sd_netlink_message *link; int r; assert(m); assert(m->rtnl); r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0); if (r < 0) return r; 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) return r; for (link = reply; link; link = sd_netlink_message_next(link)) { int k; m->enumerating = true; k = manager_rtnl_process_link(m->rtnl, link, m); if (k < 0) r = k; m->enumerating = false; } return r; } int manager_rtnl_enumerate_addresses(Manager *m) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL; sd_netlink_message *addr; 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; 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) return r; for (addr = reply; addr; addr = sd_netlink_message_next(addr)) { int k; m->enumerating = true; k = manager_rtnl_process_address(m->rtnl, addr, m); if (k < 0) r = k; m->enumerating = false; } return r; } int manager_rtnl_enumerate_neighbors(Manager *m) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL; sd_netlink_message *neigh; 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; 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) return r; for (neigh = reply; neigh; neigh = sd_netlink_message_next(neigh)) { int k; m->enumerating = true; k = manager_rtnl_process_neighbor(m->rtnl, neigh, m); if (k < 0) r = k; m->enumerating = false; } return r; } int manager_rtnl_enumerate_routes(Manager *m) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL; sd_netlink_message *route; int r; assert(m); assert(m->rtnl); r = sd_rtnl_message_new_route(m->rtnl, &req, RTM_GETROUTE, 0, 0); if (r < 0) return r; 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) return r; for (route = reply; route; route = sd_netlink_message_next(route)) { int k; m->enumerating = true; k = manager_rtnl_process_route(m->rtnl, route, m); if (k < 0) r = k; m->enumerating = false; } return r; } int manager_rtnl_enumerate_rules(Manager *m) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL; sd_netlink_message *rule; 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; 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 (r == -EOPNOTSUPP) { log_debug("FIB Rules are not supported by the kernel. Ignoring."); return 0; } return r; } for (rule = reply; rule; rule = sd_netlink_message_next(rule)) { int k; m->enumerating = true; k = manager_rtnl_process_rule(m->rtnl, rule, m); if (k < 0) r = k; m->enumerating = false; } return r; } int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, union in_addr_union *found) { AddressPool *p; int r; assert(m); assert(prefixlen > 0); assert(found); LIST_FOREACH(address_pools, p, m->address_pools) { if (p->family != family) continue; r = address_pool_acquire(p, prefixlen, found); if (r != 0) return r; } 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) { Manager *manager = userdata; const sd_bus_error *e; assert(m); assert(manager); e = sd_bus_message_get_error(m); if (e) log_warning_errno(sd_bus_error_get_errno(e), "Could not set hostname: %s", e->message); 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) { Manager *manager = userdata; const sd_bus_error *e; assert(m); assert(manager); e = sd_bus_message_get_error(m); if (e) log_warning_errno(sd_bus_error_get_errno(e), "Could not set timezone: %s", e->message); 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; } int manager_request_product_uuid(Manager *m, Link *link) { int r; assert(m); if (m->has_product_uuid) return 0; log_debug("Requesting product UUID"); if (link) { DUID *duid; assert_se(duid = link_get_duid(link)); r = set_ensure_allocated(&m->links_requesting_uuid, NULL); if (r < 0) return log_oom(); r = set_ensure_allocated(&m->duids_requesting_uuid, NULL); if (r < 0) return log_oom(); r = set_put(m->links_requesting_uuid, link); if (r < 0) return log_oom(); r = set_put(m->duids_requesting_uuid, duid); if (r < 0) return log_oom(); link_ref(link); } if (!m->bus || sd_bus_is_ready(m->bus) <= 0) { log_debug("Not connected to system bus, requesting product UUID later."); return 0; } r = sd_bus_call_method_async( m->bus, NULL, "org.freedesktop.hostname1", "/org/freedesktop/hostname1", "org.freedesktop.hostname1", "GetProductUUID", get_product_uuid_handler, m, "b", false); if (r < 0) return log_warning_errno(r, "Failed to get product UUID: %m"); return 0; }