/* SPDX-License-Identifier: LGPL-2.1+ */ /*** This file is part of systemd. Copyright 2013 Tom Gundersen ***/ #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 "dns-domain.h" #include "fd-util.h" #include "fileio.h" #include "libudev-private.h" #include "local-addresses.h" #include "netlink-util.h" #include "networkd-manager.h" #include "ordered-set.h" #include "path-util.h" #include "set.h" #include "udev-util.h" #include "virt.h" /* use 8 MB for receive socket kernel queue. */ #define RCVBUF_SIZE (8*1024*1024) const char* const network_dirs[] = { "/etc/systemd/network", "/run/systemd/network", "/usr/lib/systemd/network", #if HAVE_SPLIT_USR "/lib/systemd/network", #endif NULL}; 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, "fc00::", 7); 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; 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, "10.0.0.0", 8); 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); 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 = bus_request_name_async_may_reload_dbus(m->bus, NULL, "org.freedesktop.network1", 0, 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, &m->connected_slot, "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, &m->prepare_for_sleep_slot, "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(Manager *m, struct udev_device *device) { Link *link = NULL; int r, ifindex; assert(m); assert(device); if (!streq_ptr(udev_device_get_action(device), "add")) return 0; ifindex = udev_device_get_ifindex(device); if (ifindex <= 0) { log_debug("Ignoring udev ADD event for device with invalid ifindex"); return 0; } r = link_get(m, ifindex, &link); if (r == -ENODEV) return 0; else if (r < 0) return r; r = link_initialized(link, device); if (r < 0) return r; return 0; } static int manager_dispatch_link_udev(sd_event_source *source, int fd, uint32_t revents, void *userdata) { Manager *m = userdata; struct udev_monitor *monitor = m->udev_monitor; _cleanup_(udev_device_unrefp) struct udev_device *device = NULL; device = udev_monitor_receive_device(monitor); if (!device) return -ENOMEM; (void) manager_udev_process_link(m, 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; m->udev = udev_new(); if (!m->udev) return -ENOMEM; m->udev_monitor = udev_monitor_new_from_netlink(m->udev, "udev"); if (!m->udev_monitor) return -ENOMEM; r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_monitor, "net", NULL); if (r < 0) return log_error_errno(r, "Could not add udev monitor filter: %m"); r = udev_monitor_enable_receiving(m->udev_monitor); if (r < 0) { log_error("Could not enable udev monitor"); return r; } r = sd_event_add_io(m->event, &m->udev_event_source, udev_monitor_get_fd(m->udev_monitor), EPOLLIN, manager_dispatch_link_udev, m); if (r < 0) return r; r = sd_event_source_set_description(m->udev_event_source, "networkd-udev"); if (r < 0) return r; return 0; } int manager_rtnl_process_route(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) { Manager *m = userdata; Link *link = NULL; uint16_t type; uint32_t ifindex, priority = 0; unsigned char protocol, scope, tos, table, rt_type; int family; unsigned char dst_prefixlen, src_prefixlen; union in_addr_union dst = {}, gw = {}, src = {}, prefsrc = {}; Route *route = NULL; 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, 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 when processing route, ignoring"); return 0; } r = sd_netlink_message_read_u32(message, RTA_OIF, &ifindex); if (r == -ENODATA) { log_debug("rtnl: received route without ifindex, ignoring"); return 0; } else if (r < 0) { log_warning_errno(r, "rtnl: could not get ifindex from route, ignoring: %m"); return 0; } else if (ifindex <= 0) { log_warning("rtnl: received route message with invalid ifindex, ignoring: %d", ifindex); return 0; } else { 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 for nonexistent link (%d), ignoring", ifindex); return 0; } } r = sd_rtnl_message_route_get_family(message, &family); if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) { log_link_warning(link, "rtnl: received address with invalid family, ignoring"); return 0; } r = sd_rtnl_message_route_get_protocol(message, &protocol); if (r < 0) { log_warning_errno(r, "rtnl: could not get route protocol: %m"); return 0; } switch (family) { case AF_INET: r = sd_netlink_message_read_in_addr(message, RTA_DST, &dst.in); if (r < 0 && r != -ENODATA) { log_link_warning_errno(link, r, "rtnl: received route without valid destination, ignoring: %m"); return 0; } r = sd_netlink_message_read_in_addr(message, RTA_GATEWAY, &gw.in); if (r < 0 && r != -ENODATA) { log_link_warning_errno(link, r, "rtnl: received route with invalid gateway, ignoring: %m"); return 0; } r = sd_netlink_message_read_in_addr(message, RTA_SRC, &src.in); if (r < 0 && r != -ENODATA) { log_link_warning_errno(link, r, "rtnl: received route with invalid source, ignoring: %m"); return 0; } r = sd_netlink_message_read_in_addr(message, RTA_PREFSRC, &prefsrc.in); if (r < 0 && r != -ENODATA) { log_link_warning_errno(link, r, "rtnl: received route with invalid preferred source, ignoring: %m"); return 0; } break; case AF_INET6: r = sd_netlink_message_read_in6_addr(message, RTA_DST, &dst.in6); if (r < 0 && r != -ENODATA) { log_link_warning_errno(link, r, "rtnl: received route without valid destination, ignoring: %m"); return 0; } r = sd_netlink_message_read_in6_addr(message, RTA_GATEWAY, &gw.in6); if (r < 0 && r != -ENODATA) { log_link_warning_errno(link, r, "rtnl: received route with invalid gateway, ignoring: %m"); return 0; } r = sd_netlink_message_read_in6_addr(message, RTA_SRC, &src.in6); if (r < 0 && r != -ENODATA) { log_link_warning_errno(link, r, "rtnl: received route with invalid source, ignoring: %m"); return 0; } r = sd_netlink_message_read_in6_addr(message, RTA_PREFSRC, &prefsrc.in6); if (r < 0 && r != -ENODATA) { log_link_warning_errno(link, r, "rtnl: received route with invalid preferred source, ignoring: %m"); return 0; } break; default: assert_not_reached("Received unsupported address family"); return 0; } r = sd_rtnl_message_route_get_dst_prefixlen(message, &dst_prefixlen); if (r < 0) { log_link_warning_errno(link, r, "rtnl: received route with invalid destination prefixlen, ignoring: %m"); return 0; } r = sd_rtnl_message_route_get_src_prefixlen(message, &src_prefixlen); if (r < 0) { log_link_warning_errno(link, r, "rtnl: received route with invalid source prefixlen, ignoring: %m"); return 0; } r = sd_rtnl_message_route_get_scope(message, &scope); if (r < 0) { log_link_warning_errno(link, r, "rtnl: received route with invalid scope, ignoring: %m"); return 0; } r = sd_rtnl_message_route_get_tos(message, &tos); if (r < 0) { log_link_warning_errno(link, r, "rtnl: received route with invalid tos, ignoring: %m"); return 0; } r = sd_rtnl_message_route_get_type(message, &rt_type); if (r < 0) { log_link_warning_errno(link, r, "rtnl: received route 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 with invalid table, ignoring: %m"); return 0; } r = sd_netlink_message_read_u32(message, RTA_PRIORITY, &priority); if (r < 0 && r != -ENODATA) { log_link_warning_errno(link, r, "rtnl: received route with invalid priority, ignoring: %m"); return 0; } (void) route_get(link, family, &dst, dst_prefixlen, tos, priority, table, &route); switch (type) { case RTM_NEWROUTE: if (!route) { /* A route appeared that we did not request */ r = route_add_foreign(link, family, &dst, dst_prefixlen, tos, priority, table, &route); if (r < 0) { log_link_warning_errno(link, r, "Failed to add route, ignoring: %m"); return 0; } } route_update(route, &src, src_prefixlen, &gw, &prefsrc, scope, protocol, rt_type); break; case RTM_DELROUTE: route_free(route); 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) { Manager *m = userdata; Link *link = NULL; uint16_t type; unsigned char flags; int family; unsigned char prefixlen; unsigned char scope; union in_addr_union in_addr; struct ifa_cacheinfo cinfo; Address *address = NULL; char buf[INET6_ADDRSTRLEN], valid_buf[FORMAT_TIMESPAN_MAX]; const char *valid_str = NULL; 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: failed to receive address, 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 when processing address, ignoring"); return 0; } r = sd_rtnl_message_addr_get_ifindex(message, &ifindex); if (r < 0) { log_warning_errno(r, "rtnl: could not get ifindex from address, ignoring: %m"); return 0; } else if (ifindex <= 0) { log_warning("rtnl: received address message with invalid ifindex, ignoring: %d", ifindex); return 0; } else { 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 nonexistent link (%d), 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 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 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 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 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 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 without valid address, ignoring: %m"); return 0; } break; default: assert_not_reached("Received unsupported address family"); } if (!inet_ntop(family, &in_addr, buf, INET6_ADDRSTRLEN)) { log_link_warning(link, "Could not print address, ignoring"); return 0; } 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) { if (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, "Updating address: %s/%u (valid %s%s)", 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 add address %s/%u, ignoring: %m", buf, prefixlen); return 0; } else log_link_debug(link, "Adding address: %s/%u (valid %s%s)", buf, prefixlen, valid_str ? "for " : "forever", strempty(valid_str)); } r = address_update(address, flags, scope, &cinfo); if (r < 0) { log_link_warning_errno(link, r, "Failed to update address %s/%u, ignoring: %m", buf, prefixlen); return 0; } break; case RTM_DELADDR: if (address) { log_link_debug(link, "Removing address: %s/%u (valid %s%s)", buf, prefixlen, valid_str ? "for " : "forever", strempty(valid_str)); (void) address_drop(address); } else log_link_warning(link, "Removing non-existent address: %s/%u (valid %s%s), ignoring", 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, 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 when processing link, ignoring"); 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, 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 add new link, 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 set ifindex on netdev, ignoring: %m"); return 0; } } r = link_update(link, message); if (r < 0) { log_warning_errno(r, "Could not update link, ignoring: %m"); return 0; } break; case RTM_DELLINK: link_drop(link); netdev_drop(netdev); break; default: assert_not_reached("Received invalid RTNL message type."); } return 1; } int manager_rtnl_process_rule(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) { uint8_t tos = 0, to_prefixlen = 0, from_prefixlen = 0; union in_addr_union to = {}, from = {}; RoutingPolicyRule *rule = NULL; uint32_t fwmark = 0, table = 0; char *iif = NULL, *oif = NULL; Manager *m = userdata; uint16_t type; int family; 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, 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 = sd_rtnl_message_get_family(message, &family); if (r < 0) { log_warning_errno(r, "rtnl: could not get rule family, ignoring: %m"); return 0; } else if (!IN_SET(family, AF_INET, AF_INET6)) { log_debug("rtnl: received address with invalid family %u, ignoring", family); return 0; } switch (family) { case AF_INET: r = sd_netlink_message_read_in_addr(message, FRA_SRC, &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, &from_prefixlen); if (r < 0) { log_warning_errno(r, "rtnl: failed to retrive rule from prefix length, ignoring: %m"); return 0; } } r = sd_netlink_message_read_in_addr(message, FRA_DST, &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, &to_prefixlen); if (r < 0) { log_warning_errno(r, "rtnl: failed to retrive rule to prefix length, ignoring: %m"); return 0; } } break; case AF_INET6: r = sd_netlink_message_read_in6_addr(message, FRA_SRC, &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, &from_prefixlen); if (r < 0) { log_warning_errno(r, "rtnl: failed to retrive rule from prefix length, ignoring: %m"); return 0; } } r = sd_netlink_message_read_in6_addr(message, FRA_DST, &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, &to_prefixlen); if (r < 0) { log_warning_errno(r, "rtnl: failed to retrive rule to prefix length, ignoring: %m"); return 0; } } break; default: assert_not_reached("Received unsupported address family"); } if (from_prefixlen == 0 && to_prefixlen == 0) return 0; r = sd_netlink_message_read_u32(message, FRA_FWMARK, &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_TABLE, &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, &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, (const char **) &iif); if (r < 0 && r != -ENODATA) { log_warning_errno(r, "rtnl: could not get FRA_IIFNAME attribute, ignoring: %m"); return 0; } r = sd_netlink_message_read_string(message, FRA_OIFNAME, (const char **) &oif); if (r < 0 && r != -ENODATA) { log_warning_errno(r, "rtnl: could not get FRA_OIFNAME attribute, ignoring: %m"); return 0; } (void) routing_policy_rule_get(m, family, &from, from_prefixlen, &to, to_prefixlen, tos, fwmark, table, iif, oif, &rule); switch (type) { case RTM_NEWRULE: if (!rule) { r = routing_policy_rule_add_foreign(m, family, &from, from_prefixlen, &to, to_prefixlen, tos, fwmark, table, iif, oif, &rule); if (r < 0) { log_warning_errno(r, "Could not add rule, ignoring: %m"); return 0; } } break; case RTM_DELRULE: 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, RTM_NEWLINK, &manager_rtnl_process_link, m); if (r < 0) return r; r = sd_netlink_add_match(m->rtnl, RTM_DELLINK, &manager_rtnl_process_link, m); if (r < 0) return r; r = sd_netlink_add_match(m->rtnl, RTM_NEWADDR, &manager_rtnl_process_address, m); if (r < 0) return r; r = sd_netlink_add_match(m->rtnl, RTM_DELADDR, &manager_rtnl_process_address, m); if (r < 0) return r; r = sd_netlink_add_match(m->rtnl, RTM_NEWROUTE, &manager_rtnl_process_route, m); if (r < 0) return r; r = sd_netlink_add_match(m->rtnl, RTM_DELROUTE, &manager_rtnl_process_route, m); if (r < 0) return r; r = sd_netlink_add_match(m->rtnl, RTM_NEWRULE, &manager_rtnl_process_rule, m); if (r < 0) return r; r = sd_netlink_add_match(m->rtnl, RTM_DELRULE, &manager_rtnl_process_rule, m); 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, unsigned n) { int r, c = 0; unsigned i; assert(s); assert(n == 0 || addresses); for (i = 0; i < n; i++) { r = ordered_set_put_in4_addr(s, addresses+i); if (r < 0) return r; c += r; } return c; } static void print_string_set(FILE *f, const char *field, OrderedSet *s) { bool space = false; Iterator i; char *p; if (ordered_set_isempty(s)) return; fputs(field, f); ORDERED_SET_FOREACH(p, s, i) fputs_with_space(f, p, NULL, &space); fputc('\n', f); } 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_fclose_ FILE *f = NULL; LinkOperationalState operstate = LINK_OPERSTATE_OFF; const char *operstate_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->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->network->ntp); if (r < 0) return r; r = ordered_set_put_strdupv(search_domains, link->network->search_domains); if (r < 0) return r; r = ordered_set_put_strdupv(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); 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); 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; } } operstate_str = link_operstate_to_string(operstate); assert(operstate_str); r = fopen_temporary(m->state_file, &f, &temp_path); if (r < 0) return r; (void) __fsetlocking(f, FSETLOCKING_BYCALLER); (void) fchmod(fileno(f), 0644); fprintf(f, "# This is private data. Do not parse.\n" "OPER_STATE=%s\n", operstate_str); print_string_set(f, "DNS=", dns); print_string_set(f, "NTP=", ntp); print_string_set(f, "DOMAINS=", search_domains); print_string_set(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; r = manager_send_changed(m, "OperationalState", NULL); if (r < 0) log_error_errno(r, "Could not emit changed OperationalState: %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; int r; assert(m); if (m->dirty) manager_save(m); SET_FOREACH(link, m->dirty_links, i) { r = link_save(link); if (r >= 0) link_clean(link); } return 1; } Link *manager_dhcp6_prefix_get(Manager *m, struct in6_addr *addr) { assert_return(m, NULL); assert_return(m->dhcp6_prefixes, NULL); assert_return(addr, NULL); return hashmap_get(m->dhcp6_prefixes, addr); } static int dhcp6_route_add_callback(sd_netlink *nl, sd_netlink_message *m, void *userdata) { Link *l = userdata; int r; union in_addr_union prefix; _cleanup_free_ char *buf = NULL; r = sd_netlink_message_get_errno(m); if (r != 0) { log_link_debug_errno(l, r, "Received error adding DHCPv6 Prefix Delegation route: %m"); return 0; } r = sd_netlink_message_read_in6_addr(m, RTA_DST, &prefix.in6); if (r < 0) { log_link_debug_errno(l, r, "Could not read IPv6 address from DHCPv6 Prefix Delegation while adding route: %m"); return 0; } (void) in_addr_to_string(AF_INET6, &prefix, &buf); log_link_debug(l, "Added DHCPv6 Prefix Deleagtion route %s/64", strnull(buf)); return 0; } int manager_dhcp6_prefix_add(Manager *m, struct in6_addr *addr, Link *link) { int r; Route *route; assert_return(m, -EINVAL); assert_return(m->dhcp6_prefixes, -ENODATA); assert_return(addr, -EINVAL); r = route_add(link, AF_INET6, (union in_addr_union *) addr, 64, 0, 0, 0, &route); if (r < 0) return r; r = route_configure(route, link, dhcp6_route_add_callback); if (r < 0) return r; return hashmap_put(m->dhcp6_prefixes, addr, link); } static int dhcp6_route_remove_callback(sd_netlink *nl, sd_netlink_message *m, void *userdata) { Link *l = userdata; int r; union in_addr_union prefix; _cleanup_free_ char *buf = NULL; r = sd_netlink_message_get_errno(m); if (r != 0) { log_link_debug_errno(l, r, "Received error on DHCPv6 Prefix Delegation route removal: %m"); return 0; } r = sd_netlink_message_read_in6_addr(m, RTA_DST, &prefix.in6); if (r < 0) { log_link_debug_errno(l, r, "Could not read IPv6 address from DHCPv6 Prefix Delegation while removing route: %m"); return 0; } (void) in_addr_to_string(AF_INET6, &prefix, &buf); log_link_debug(l, "Removed DHCPv6 Prefix Delegation route %s/64", strnull(buf)); return 0; } int manager_dhcp6_prefix_remove(Manager *m, struct in6_addr *addr) { Link *l; int r; Route *route; assert_return(m, -EINVAL); assert_return(m->dhcp6_prefixes, -ENODATA); assert_return(addr, -EINVAL); l = hashmap_remove(m->dhcp6_prefixes, addr); if (!l) return -EINVAL; (void) sd_radv_remove_prefix(l->radv, addr, 64); r = route_get(l, AF_INET6, (union in_addr_union *) addr, 64, 0, 0, 0, &route); if (r >= 0) (void) route_remove(route, l, dhcp6_route_remove_callback); return 0; } int manager_dhcp6_prefix_remove_all(Manager *m, Link *link) { Iterator i; Link *l; struct in6_addr *addr; assert_return(m, -EINVAL); assert_return(link, -EINVAL); HASHMAP_FOREACH_KEY(l, addr, m->dhcp6_prefixes, i) { if (l != link) continue; (void) manager_dhcp6_prefix_remove(m, addr); } return 0; } static void dhcp6_prefixes_hash_func(const void *p, struct siphash *state) { const struct in6_addr *addr = p; assert(p); siphash24_compress(addr, sizeof(*addr), state); } static int dhcp6_prefixes_compare_func(const void *_a, const void *_b) { const struct in6_addr *a = _a, *b = _b; return memcmp(a, b, sizeof(*a)); } static const struct hash_ops dhcp6_prefixes_hash_ops = { .hash = dhcp6_prefixes_hash_func, .compare = dhcp6_prefixes_compare_func, }; int manager_new(Manager **ret, sd_event *event) { _cleanup_(manager_freep) Manager *m = NULL; int r; m = new0(Manager, 1); if (!m) return -ENOMEM; m->state_file = strdup("/run/systemd/netif/state"); if (!m->state_file) return -ENOMEM; m->event = sd_event_ref(event); 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; m->netdevs = hashmap_new(&string_hash_ops); if (!m->netdevs) return -ENOMEM; LIST_HEAD_INIT(m->networks); 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->dhcp6_prefixes = hashmap_new(&dhcp6_prefixes_hash_ops); if (!m->dhcp6_prefixes) return -ENOMEM; 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) { Network *network; NetDev *netdev; Link *link; AddressPool *pool; if (!m) return; free(m->state_file); while ((network = m->networks)) network_free(network); while ((link = hashmap_first(m->dhcp6_prefixes))) link_unref(link); hashmap_free(m->dhcp6_prefixes); while ((link = hashmap_first(m->links))) link_unref(link); hashmap_free(m->links); hashmap_free(m->networks_by_name); while ((netdev = hashmap_first(m->netdevs))) netdev_unref(netdev); hashmap_free(m->netdevs); while ((pool = m->address_pools)) address_pool_free(pool); set_free(m->rules); set_free(m->rules_foreign); set_free_with_destructor(m->rules_saved, routing_policy_rule_free); sd_netlink_unref(m->rtnl); sd_event_unref(m->event); sd_resolve_unref(m->resolve); sd_event_source_unref(m->udev_event_source); udev_monitor_unref(m->udev_monitor); udev_unref(m->udev); sd_bus_unref(m->bus); sd_bus_slot_unref(m->prepare_for_sleep_slot); sd_bus_slot_unref(m->connected_slot); free(m->dynamic_timezone); free(m->dynamic_hostname); free(m); } int manager_start(Manager *m) { Link *link; Iterator i; assert(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_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_info("Not connected to system bus, not setting hostname."); 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_info("Not connected to system bus, not setting timezone."); 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; }