/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include #include "sd-bus.h" #include "sd-dhcp-server.h" #include "alloc-util.h" #include "bus-common-errors.h" #include "bus-get-properties.h" #include "bus-message-util.h" #include "bus-object.h" #include "bus-polkit.h" #include "dns-domain.h" #include "networkd-dhcp4.h" #include "networkd-json.h" #include "networkd-link.h" #include "networkd-link-bus.h" #include "networkd-manager.h" #include "networkd-state-file.h" #include "ordered-set.h" #include "parse-util.h" #include "resolve-util.h" #include "set.h" #include "socket-netlink.h" #include "string-util.h" #include "strv.h" BUS_DEFINE_PROPERTY_GET_ENUM(property_get_operational_state, link_operstate, LinkOperationalState); BUS_DEFINE_PROPERTY_GET_ENUM(property_get_carrier_state, link_carrier_state, LinkCarrierState); BUS_DEFINE_PROPERTY_GET_ENUM(property_get_address_state, link_address_state, LinkAddressState); BUS_DEFINE_PROPERTY_GET_ENUM(property_get_online_state, link_online_state, LinkOnlineState); static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_administrative_state, link_state, LinkState); static int property_get_bit_rates( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { Link *link = ASSERT_PTR(userdata); Manager *manager; double interval_sec; uint64_t tx, rx; assert(bus); assert(reply); manager = link->manager; if (!manager->use_speed_meter || manager->speed_meter_usec_old == 0 || !link->stats_updated) return sd_bus_message_append(reply, "(tt)", UINT64_MAX, UINT64_MAX); assert(manager->speed_meter_usec_new > manager->speed_meter_usec_old); interval_sec = (double) (manager->speed_meter_usec_new - manager->speed_meter_usec_old) / USEC_PER_SEC; if (link->stats_new.tx_bytes > link->stats_old.tx_bytes) tx = (uint64_t) ((link->stats_new.tx_bytes - link->stats_old.tx_bytes) / interval_sec); else tx = (uint64_t) ((UINT64_MAX - (link->stats_old.tx_bytes - link->stats_new.tx_bytes)) / interval_sec); if (link->stats_new.rx_bytes > link->stats_old.rx_bytes) rx = (uint64_t) ((link->stats_new.rx_bytes - link->stats_old.rx_bytes) / interval_sec); else rx = (uint64_t) ((UINT64_MAX - (link->stats_old.rx_bytes - link->stats_new.rx_bytes)) / interval_sec); return sd_bus_message_append(reply, "(tt)", tx, rx); } static int verify_managed_link(Link *l, sd_bus_error *error) { assert(l); if (l->flags & IFF_LOOPBACK) return sd_bus_error_setf(error, BUS_ERROR_LINK_BUSY, "Link %s is loopback device.", l->ifname); return 0; } int bus_link_method_set_ntp_servers(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_strv_free_ char **ntp = NULL; Link *l = ASSERT_PTR(userdata); int r; assert(message); r = verify_managed_link(l, error); if (r < 0) return r; r = sd_bus_message_read_strv(message, &ntp); if (r < 0) return r; STRV_FOREACH(i, ntp) { r = dns_name_is_valid_or_address(*i); if (r < 0) return r; if (r == 0) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid NTP server: %s", *i); } r = bus_verify_polkit_async( message, "org.freedesktop.network1.set-ntp-servers", /* details= */ NULL, &l->manager->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* Polkit will call us back */ strv_free_and_replace(l->ntp, ntp); r = link_save_and_clean_full(l, /* also_save_manager= */ true); if (r < 0) return r; return sd_bus_reply_method_return(message, NULL); } static int bus_link_method_set_dns_servers_internal(sd_bus_message *message, void *userdata, sd_bus_error *error, bool extended) { struct in_addr_full **dns; Link *l = ASSERT_PTR(userdata); size_t n; int r; assert(message); r = verify_managed_link(l, error); if (r < 0) return r; r = bus_message_read_dns_servers(message, error, extended, &dns, &n); if (r < 0) return r; r = bus_verify_polkit_async( message, "org.freedesktop.network1.set-dns-servers", /* details= */ NULL, &l->manager->polkit_registry, error); if (r < 0) goto finalize; if (r == 0) { r = 1; /* Polkit will call us back */ goto finalize; } if (l->n_dns != UINT_MAX) for (unsigned i = 0; i < l->n_dns; i++) in_addr_full_free(l->dns[i]); free_and_replace(l->dns, dns); l->n_dns = n; r = link_save_and_clean_full(l, /* also_save_manager= */ true); if (r < 0) return r; return sd_bus_reply_method_return(message, NULL); finalize: for (size_t i = 0; i < n; i++) in_addr_full_free(dns[i]); free(dns); return r; } int bus_link_method_set_dns_servers(sd_bus_message *message, void *userdata, sd_bus_error *error) { return bus_link_method_set_dns_servers_internal(message, userdata, error, false); } int bus_link_method_set_dns_servers_ex(sd_bus_message *message, void *userdata, sd_bus_error *error) { return bus_link_method_set_dns_servers_internal(message, userdata, error, true); } int bus_link_method_set_domains(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_ordered_set_free_ OrderedSet *search_domains = NULL, *route_domains = NULL; Link *l = ASSERT_PTR(userdata); int r; assert(message); r = verify_managed_link(l, error); if (r < 0) return r; r = sd_bus_message_enter_container(message, 'a', "(sb)"); if (r < 0) return r; /* The method accepts an empty strv, to override the domains set in .network. * Hence, we need to explicitly allocate empty sets here. */ search_domains = ordered_set_new(&dns_name_hash_ops_free); if (!search_domains) return -ENOMEM; route_domains = ordered_set_new(&dns_name_hash_ops_free); if (!route_domains) return -ENOMEM; for (;;) { _cleanup_free_ char *str = NULL; const char *name; int route_only; r = sd_bus_message_read(message, "(sb)", &name, &route_only); if (r < 0) return r; if (r == 0) break; r = dns_name_is_valid(name); if (r < 0) return r; if (r == 0) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid search domain %s", name); if (!route_only && dns_name_is_root(name)) return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Root domain is not suitable as search domain"); r = dns_name_normalize(name, 0, &str); if (r < 0) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid search domain %s", name); r = ordered_set_consume(route_only ? route_domains : search_domains, TAKE_PTR(str)); if (r == -EEXIST) continue; if (r < 0) return r; } r = sd_bus_message_exit_container(message); if (r < 0) return r; r = bus_verify_polkit_async( message, "org.freedesktop.network1.set-domains", /* details= */ NULL, &l->manager->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* Polkit will call us back */ ordered_set_free(l->search_domains); ordered_set_free(l->route_domains); l->search_domains = TAKE_PTR(search_domains); l->route_domains = TAKE_PTR(route_domains); r = link_save_and_clean_full(l, /* also_save_manager= */ true); if (r < 0) return r; return sd_bus_reply_method_return(message, NULL); } int bus_link_method_set_default_route(sd_bus_message *message, void *userdata, sd_bus_error *error) { Link *l = ASSERT_PTR(userdata); int r, b; assert(message); r = verify_managed_link(l, error); if (r < 0) return r; r = sd_bus_message_read(message, "b", &b); if (r < 0) return r; r = bus_verify_polkit_async( message, "org.freedesktop.network1.set-default-route", /* details= */ NULL, &l->manager->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* Polkit will call us back */ if (l->dns_default_route != b) { l->dns_default_route = b; r = link_save_and_clean_full(l, /* also_save_manager= */ true); if (r < 0) return r; } return sd_bus_reply_method_return(message, NULL); } int bus_link_method_set_llmnr(sd_bus_message *message, void *userdata, sd_bus_error *error) { Link *l = ASSERT_PTR(userdata); ResolveSupport mode; const char *llmnr; int r; assert(message); r = verify_managed_link(l, error); if (r < 0) return r; r = sd_bus_message_read(message, "s", &llmnr); if (r < 0) return r; if (isempty(llmnr)) mode = RESOLVE_SUPPORT_YES; else { mode = resolve_support_from_string(llmnr); if (mode < 0) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid LLMNR setting: %s", llmnr); } r = bus_verify_polkit_async( message, "org.freedesktop.network1.set-llmnr", /* details= */ NULL, &l->manager->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* Polkit will call us back */ if (l->llmnr != mode) { l->llmnr = mode; r = link_save_and_clean_full(l, /* also_save_manager= */ true); if (r < 0) return r; } return sd_bus_reply_method_return(message, NULL); } int bus_link_method_set_mdns(sd_bus_message *message, void *userdata, sd_bus_error *error) { Link *l = ASSERT_PTR(userdata); ResolveSupport mode; const char *mdns; int r; assert(message); r = verify_managed_link(l, error); if (r < 0) return r; r = sd_bus_message_read(message, "s", &mdns); if (r < 0) return r; if (isempty(mdns)) mode = RESOLVE_SUPPORT_NO; else { mode = resolve_support_from_string(mdns); if (mode < 0) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid MulticastDNS setting: %s", mdns); } r = bus_verify_polkit_async( message, "org.freedesktop.network1.set-mdns", /* details= */ NULL, &l->manager->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* Polkit will call us back */ if (l->mdns != mode) { l->mdns = mode; r = link_save_and_clean_full(l, /* also_save_manager= */ true); if (r < 0) return r; } return sd_bus_reply_method_return(message, NULL); } int bus_link_method_set_dns_over_tls(sd_bus_message *message, void *userdata, sd_bus_error *error) { Link *l = ASSERT_PTR(userdata); const char *dns_over_tls; DnsOverTlsMode mode; int r; assert(message); r = verify_managed_link(l, error); if (r < 0) return r; r = sd_bus_message_read(message, "s", &dns_over_tls); if (r < 0) return r; if (isempty(dns_over_tls)) mode = _DNS_OVER_TLS_MODE_INVALID; else { mode = dns_over_tls_mode_from_string(dns_over_tls); if (mode < 0) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid DNSOverTLS setting: %s", dns_over_tls); } r = bus_verify_polkit_async( message, "org.freedesktop.network1.set-dns-over-tls", /* details= */ NULL, &l->manager->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* Polkit will call us back */ if (l->dns_over_tls_mode != mode) { l->dns_over_tls_mode = mode; r = link_save_and_clean_full(l, /* also_save_manager= */ true); if (r < 0) return r; } return sd_bus_reply_method_return(message, NULL); } int bus_link_method_set_dnssec(sd_bus_message *message, void *userdata, sd_bus_error *error) { Link *l = ASSERT_PTR(userdata); const char *dnssec; DnssecMode mode; int r; assert(message); r = verify_managed_link(l, error); if (r < 0) return r; r = sd_bus_message_read(message, "s", &dnssec); if (r < 0) return r; if (isempty(dnssec)) mode = _DNSSEC_MODE_INVALID; else { mode = dnssec_mode_from_string(dnssec); if (mode < 0) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid DNSSEC setting: %s", dnssec); } r = bus_verify_polkit_async( message, "org.freedesktop.network1.set-dnssec", /* details= */ NULL, &l->manager->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* Polkit will call us back */ if (l->dnssec_mode != mode) { l->dnssec_mode = mode; r = link_save_and_clean_full(l, /* also_save_manager= */ true); if (r < 0) return r; } return sd_bus_reply_method_return(message, NULL); } int bus_link_method_set_dnssec_negative_trust_anchors(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_set_free_ Set *ns = NULL; _cleanup_strv_free_ char **ntas = NULL; Link *l = ASSERT_PTR(userdata); int r; assert(message); r = verify_managed_link(l, error); if (r < 0) return r; r = sd_bus_message_read_strv(message, &ntas); if (r < 0) return r; STRV_FOREACH(i, ntas) { r = dns_name_is_valid(*i); if (r < 0) return r; if (r == 0) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid negative trust anchor domain: %s", *i); } /* The method accepts an empty strv, to override the negative trust anchors set in .network. * Hence, we need to explicitly allocate an empty set here. */ ns = set_new(&dns_name_hash_ops_free); if (!ns) return -ENOMEM; STRV_FOREACH(i, ntas) { r = set_put_strdup_full(&ns, &dns_name_hash_ops_free, *i); if (r < 0) return r; } r = bus_verify_polkit_async( message, "org.freedesktop.network1.set-dnssec-negative-trust-anchors", /* details= */ NULL, &l->manager->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* Polkit will call us back */ set_free_and_replace(l->dnssec_negative_trust_anchors, ns); r = link_save_and_clean_full(l, /* also_save_manager= */ true); if (r < 0) return r; return sd_bus_reply_method_return(message, NULL); } int bus_link_method_revert_ntp(sd_bus_message *message, void *userdata, sd_bus_error *error) { Link *l = ASSERT_PTR(userdata); int r; assert(message); r = verify_managed_link(l, error); if (r < 0) return r; r = bus_verify_polkit_async( message, "org.freedesktop.network1.revert-ntp", /* details= */ NULL, &l->manager->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* Polkit will call us back */ link_ntp_settings_clear(l); r = link_save_and_clean_full(l, /* also_save_manager= */ true); if (r < 0) return r; return sd_bus_reply_method_return(message, NULL); } int bus_link_method_revert_dns(sd_bus_message *message, void *userdata, sd_bus_error *error) { Link *l = ASSERT_PTR(userdata); int r; assert(message); r = verify_managed_link(l, error); if (r < 0) return r; r = bus_verify_polkit_async( message, "org.freedesktop.network1.revert-dns", /* details= */ NULL, &l->manager->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* Polkit will call us back */ link_dns_settings_clear(l); r = link_save_and_clean_full(l, /* also_save_manager= */ true); if (r < 0) return r; return sd_bus_reply_method_return(message, NULL); } int bus_link_method_force_renew(sd_bus_message *message, void *userdata, sd_bus_error *error) { Link *l = ASSERT_PTR(userdata); int r; if (!l->network) return sd_bus_error_setf(error, BUS_ERROR_UNMANAGED_INTERFACE, "Interface %s is not managed by systemd-networkd", l->ifname); r = bus_verify_polkit_async( message, "org.freedesktop.network1.forcerenew", /* details= */ NULL, &l->manager->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* Polkit will call us back */ if (sd_dhcp_server_is_running(l->dhcp_server)) { r = sd_dhcp_server_forcerenew(l->dhcp_server); if (r < 0) return r; } return sd_bus_reply_method_return(message, NULL); } int bus_link_method_renew(sd_bus_message *message, void *userdata, sd_bus_error *error) { Link *l = ASSERT_PTR(userdata); int r; if (!l->network) return sd_bus_error_setf(error, BUS_ERROR_UNMANAGED_INTERFACE, "Interface %s is not managed by systemd-networkd", l->ifname); r = bus_verify_polkit_async( message, "org.freedesktop.network1.renew", /* details= */ NULL, &l->manager->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* Polkit will call us back */ r = dhcp4_renew(l); if (r < 0) return r; return sd_bus_reply_method_return(message, NULL); } int bus_link_method_reconfigure(sd_bus_message *message, void *userdata, sd_bus_error *error) { Link *l = ASSERT_PTR(userdata); int r; assert(message); r = bus_verify_polkit_async( message, "org.freedesktop.network1.reconfigure", /* details= */ NULL, &l->manager->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* Polkit will call us back */ r = link_reconfigure_full(l, LINK_RECONFIGURE_UNCONDITIONALLY | LINK_RECONFIGURE_CLEANLY, message, /* counter= */ NULL); if (r != 0) return r; /* Will reply later when r > 0. */ return sd_bus_reply_method_return(message, NULL); } int bus_link_method_describe(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; _cleanup_(sd_json_variant_unrefp) sd_json_variant *v = NULL; _cleanup_free_ char *text = NULL; Link *link = ASSERT_PTR(userdata); int r; assert(message); r = link_build_json(link, &v); if (r < 0) return log_link_error_errno(link, r, "Failed to build JSON data: %m"); r = sd_json_variant_format(v, 0, &text); if (r < 0) return log_link_error_errno(link, r, "Failed to format JSON data: %m"); r = sd_bus_message_new_method_return(message, &reply); if (r < 0) return r; r = sd_bus_message_append(reply, "s", text); if (r < 0) return r; return sd_bus_message_send(reply); } static const sd_bus_vtable link_vtable[] = { SD_BUS_VTABLE_START(0), SD_BUS_PROPERTY("OperationalState", "s", property_get_operational_state, offsetof(Link, operstate), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_PROPERTY("CarrierState", "s", property_get_carrier_state, offsetof(Link, carrier_state), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_PROPERTY("AddressState", "s", property_get_address_state, offsetof(Link, address_state), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_PROPERTY("IPv4AddressState", "s", property_get_address_state, offsetof(Link, ipv4_address_state), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_PROPERTY("IPv6AddressState", "s", property_get_address_state, offsetof(Link, ipv6_address_state), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_PROPERTY("OnlineState", "s", property_get_online_state, offsetof(Link, online_state), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_PROPERTY("AdministrativeState", "s", property_get_administrative_state, offsetof(Link, state), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_PROPERTY("BitRates", "(tt)", property_get_bit_rates, 0, 0), SD_BUS_METHOD_WITH_ARGS("SetNTP", SD_BUS_ARGS("as", servers), SD_BUS_NO_RESULT, bus_link_method_set_ntp_servers, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("SetDNS", SD_BUS_ARGS("a(iay)", addresses), SD_BUS_NO_RESULT, bus_link_method_set_dns_servers, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("SetDNSEx", SD_BUS_ARGS("a(iayqs)", addresses), SD_BUS_NO_RESULT, bus_link_method_set_dns_servers_ex, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("SetDomains", SD_BUS_ARGS("a(sb)", domains), SD_BUS_NO_RESULT, bus_link_method_set_domains, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("SetDefaultRoute", SD_BUS_ARGS("b", enable), SD_BUS_NO_RESULT, bus_link_method_set_default_route, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("SetLLMNR", SD_BUS_ARGS("s", mode), SD_BUS_NO_RESULT, bus_link_method_set_llmnr, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("SetMulticastDNS", SD_BUS_ARGS("s", mode), SD_BUS_NO_RESULT, bus_link_method_set_mdns, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("SetDNSOverTLS", SD_BUS_ARGS("s", mode), SD_BUS_NO_RESULT, bus_link_method_set_dns_over_tls, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("SetDNSSEC", SD_BUS_ARGS("s", mode), SD_BUS_NO_RESULT, bus_link_method_set_dnssec, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("SetDNSSECNegativeTrustAnchors", SD_BUS_ARGS("as", names), SD_BUS_NO_RESULT, bus_link_method_set_dnssec_negative_trust_anchors, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("RevertNTP", SD_BUS_NO_ARGS, SD_BUS_NO_RESULT, bus_link_method_revert_ntp, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("RevertDNS", SD_BUS_NO_ARGS, SD_BUS_NO_RESULT, bus_link_method_revert_dns, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("Renew", SD_BUS_NO_ARGS, SD_BUS_NO_RESULT, bus_link_method_renew, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("ForceRenew", SD_BUS_NO_ARGS, SD_BUS_NO_RESULT, bus_link_method_force_renew, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("Reconfigure", SD_BUS_NO_ARGS, SD_BUS_NO_RESULT, bus_link_method_reconfigure, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("Describe", SD_BUS_NO_ARGS, SD_BUS_RESULT("s", json), bus_link_method_describe, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_VTABLE_END }; char* link_bus_path(Link *link) { _cleanup_free_ char *ifindex = NULL; char *p; int r; assert(link); assert(link->ifindex > 0); if (asprintf(&ifindex, "%d", link->ifindex) < 0) return NULL; r = sd_bus_path_encode("/org/freedesktop/network1/link", ifindex, &p); if (r < 0) return NULL; return p; } int link_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) { _cleanup_strv_free_ char **l = NULL; Manager *m = ASSERT_PTR(userdata); unsigned c = 0; Link *link; assert(bus); assert(path); assert(nodes); l = new0(char*, hashmap_size(m->links_by_index) + 1); if (!l) return -ENOMEM; HASHMAP_FOREACH(link, m->links_by_index) { char *p; p = link_bus_path(link); if (!p) return -ENOMEM; l[c++] = p; } l[c] = NULL; *nodes = TAKE_PTR(l); return 1; } int link_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) { _cleanup_free_ char *identifier = NULL; Manager *m = ASSERT_PTR(userdata); Link *link; int ifindex, r; assert(bus); assert(path); assert(interface); assert(found); r = sd_bus_path_decode(path, "/org/freedesktop/network1/link", &identifier); if (r <= 0) return 0; ifindex = parse_ifindex(identifier); if (ifindex < 0) return 0; r = link_get_by_index(m, ifindex, &link); if (r < 0) return 0; if (streq(interface, "org.freedesktop.network1.DHCPServer") && (!link->dhcp_server || sd_dhcp_server_is_in_relay_mode(link->dhcp_server))) return 0; if (streq(interface, "org.freedesktop.network1.DHCPv4Client") && !link->dhcp_client) return 0; if (streq(interface, "org.freedesktop.network1.DHCPv6Client") && !link->dhcp6_client) return 0; *found = link; return 1; } int link_send_changed_strv(Link *link, char **properties) { _cleanup_free_ char *p = NULL; assert(link); assert(link->manager); assert(properties); if (sd_bus_is_ready(link->manager->bus) <= 0) return 0; p = link_bus_path(link); if (!p) return -ENOMEM; return sd_bus_emit_properties_changed_strv( link->manager->bus, p, "org.freedesktop.network1.Link", properties); } const BusObjectImplementation link_object = { "/org/freedesktop/network1/link", "org.freedesktop.network1.Link", .fallback_vtables = BUS_FALLBACK_VTABLES({link_vtable, link_object_find}), .node_enumerator = link_node_enumerator, };