static int dhcp4_address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { _cleanup_link_unref_ Link *link = userdata; int r; assert(link); r = sd_netlink_message_get_errno(m); if (r < 0 && r != -EEXIST) { log_link_error_errno(link, r, "Could not set DHCPv4 address: %m"); link_enter_failed(link); } else if (r >= 0) manager_rtnl_process_address(rtnl, m, link->manager); link_set_dhcp_routes(link); return 1; }
/* send a request to the kernel to add a FDB entry in its static MAC table. */ int fdb_entry_configure(Link *const link, FdbEntry *const fdb_entry) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; sd_netlink *rtnl; int r; assert(link); assert(link->manager); assert(fdb_entry); rtnl = link->manager->rtnl; /* create new RTM message */ r = sd_rtnl_message_new_neigh(rtnl, &req, RTM_NEWNEIGH, link->ifindex, PF_BRIDGE); if (r < 0) return rtnl_log_create_error(r); /* only NTF_SELF flag supported. */ r = sd_rtnl_message_neigh_set_flags(req, NTF_SELF); if (r < 0) return rtnl_log_create_error(r); /* only NUD_PERMANENT state supported. */ r = sd_rtnl_message_neigh_set_state(req, NUD_NOARP | NUD_PERMANENT); if (r < 0) return rtnl_log_create_error(r); r = sd_netlink_message_append_ether_addr(req, NDA_LLADDR, fdb_entry->mac_addr); if (r < 0) return rtnl_log_create_error(r); /* VLAN Id is optional. We'll add VLAN Id only if it's specified. */ if (0 != fdb_entry->vlan_id) { r = sd_netlink_message_append_u16(req, NDA_VLAN, fdb_entry->vlan_id); if (r < 0) return rtnl_log_create_error(r); } /* send message to the kernel to update its internal static MAC table. */ r = sd_netlink_call_async(rtnl, req, set_fdb_handler, link, 0, NULL); if (r < 0) return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); return 0; }
static int ipv4ll_route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { _cleanup_link_unref_ Link *link = userdata; int r; assert(link); assert(!link->ipv4ll_route); r = sd_netlink_message_get_errno(m); if (r < 0 && r != -EEXIST) { log_link_error_errno(link, r, "could not set ipv4ll route: %m"); link_enter_failed(link); } link->ipv4ll_route = true; if (link->ipv4ll_address == true) link_check_ready(link); return 1; }
static int dhcp4_route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { int r; assert(link); assert(link->dhcp4_messages > 0); link->dhcp4_messages--; r = sd_netlink_message_get_errno(m); if (r < 0 && r != -EEXIST) { log_link_error_errno(link, r, "Could not set DHCPv4 route: %m"); link_enter_failed(link); } if (link->dhcp4_messages == 0) { link->dhcp4_configured = true; link_check_ready(link); } return 1; }
static int ipv4ll_address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { _cleanup_(link_unrefp) Link *link = userdata; int r; assert(link); assert(!link->ipv4ll_address); r = sd_netlink_message_get_errno(m); if (r < 0 && r != -EEXIST) { log_link_error_errno(link, r, "could not set ipv4ll address: %m"); link_enter_failed(link); } else if (r >= 0) manager_rtnl_process_address(rtnl, m, link->manager); link->ipv4ll_address = true; if (link->ipv4ll_route) link_check_ready(link); return 1; }
static int ndisc_netlink_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { _cleanup_link_unref_ Link *link = userdata; int r; assert(link); assert(link->ndisc_messages > 0); link->ndisc_messages--; r = sd_netlink_message_get_errno(m); if (r < 0 && r != -EEXIST) { log_link_error_errno(link, r, "Could not set NDisc route or address: %m"); link_enter_failed(link); } if (link->ndisc_messages == 0) { link->ndisc_configured = true; link_check_ready(link); } return 1; }
static int dhcp4_route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { _cleanup_link_unref_ Link *link = userdata; int r; assert(link); assert(link->dhcp4_messages); link->dhcp4_messages --; r = sd_netlink_message_get_errno(m); if (r < 0 && r != -EEXIST) { log_link_error_errno(link, r, "Could not set DHCPv4 route: %m"); link_enter_failed(link); } if (!link->dhcp4_messages) { link->dhcp4_configured = true; link_check_ready(link); } return 1; }
static int dhcp4_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { int r; assert(link); r = sd_netlink_message_get_errno(m); if (r < 0 && r != -EEXIST) { log_link_error_errno(link, r, "Could not set DHCPv4 address: %m"); link_enter_failed(link); } else if (r >= 0) manager_rtnl_process_address(rtnl, m, link->manager); link_set_dhcp_routes(link); /* Add back static routes since kernel removes while DHCPv4 address is removed from when lease expires */ link_request_set_routes(link); if (link->dhcp4_messages == 0) { link->dhcp4_configured = true; link_check_ready(link); } return 1; }
static int link_set_dhcp_routes(Link *link) { struct in_addr gateway, address; _cleanup_free_ sd_dhcp_route **static_routes = NULL; int r, n, i; assert(link); assert(link->dhcp_lease); assert(link->network); if (!link->network->dhcp_use_routes) return 0; r = sd_dhcp_lease_get_address(link->dhcp_lease, &address); if (r < 0) return log_link_warning_errno(link, r, "DHCP error: could not get address: %m"); r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway); if (r < 0 && r != -ENODATA) return log_link_warning_errno(link, r, "DHCP error: could not get gateway: %m"); if (r >= 0) { _cleanup_route_free_ Route *route = NULL; _cleanup_route_free_ Route *route_gw = NULL; r = route_new(&route); if (r < 0) return log_link_error_errno(link, r, "Could not allocate route: %m"); route->protocol = RTPROT_DHCP; r = route_new(&route_gw); if (r < 0) return log_link_error_errno(link, r, "Could not allocate route: %m"); /* The dhcp netmask may mask out the gateway. Add an explicit * route for the gw host so that we can route no matter the * netmask or existing kernel route tables. */ route_gw->family = AF_INET; route_gw->dst.in = gateway; route_gw->dst_prefixlen = 32; route_gw->prefsrc.in = address; route_gw->scope = RT_SCOPE_LINK; route_gw->protocol = RTPROT_DHCP; route_gw->priority = link->network->dhcp_route_metric; route_gw->table = link->network->dhcp_route_table; r = route_configure(route_gw, link, dhcp4_route_handler); if (r < 0) return log_link_warning_errno(link, r, "Could not set host route: %m"); link->dhcp4_messages++; route->family = AF_INET; route->gw.in = gateway; route->prefsrc.in = address; route->priority = link->network->dhcp_route_metric; route->table = link->network->dhcp_route_table; r = route_configure(route, link, dhcp4_route_handler); if (r < 0) { log_link_warning_errno(link, r, "Could not set routes: %m"); link_enter_failed(link); return r; } link->dhcp4_messages++; } n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes); if (n == -ENODATA) return 0; if (n < 0) return log_link_warning_errno(link, n, "DHCP error: could not get routes: %m"); for (i = 0; i < n; i++) { _cleanup_route_free_ Route *route = NULL; r = route_new(&route); if (r < 0) return log_link_error_errno(link, r, "Could not allocate route: %m"); route->family = AF_INET; route->protocol = RTPROT_DHCP; assert_se(sd_dhcp_route_get_gateway(static_routes[i], &route->gw.in) >= 0); assert_se(sd_dhcp_route_get_destination(static_routes[i], &route->dst.in) >= 0); assert_se(sd_dhcp_route_get_destination_prefix_length(static_routes[i], &route->dst_prefixlen) >= 0); route->priority = link->network->dhcp_route_metric; route->table = link->network->dhcp_route_table; route->scope = route_scope_from_address(route, &address); r = route_configure(route, link, dhcp4_route_handler); if (r < 0) return log_link_warning_errno(link, r, "Could not set host route: %m"); link->dhcp4_messages++; } return 0; }
static int link_set_dhcp_routes(Link *link) { _cleanup_free_ sd_dhcp_route **static_routes = NULL; bool classless_route = false, static_route = false; struct in_addr gateway, address; int r, n, i; uint32_t table; assert(link); if (!link->dhcp_lease) /* link went down while we configured the IP addresses? */ return 0; if (!link->network) /* link went down while we configured the IP addresses? */ return 0; if (!link->network->dhcp_use_routes) return 0; /* When the interface is part of an VRF use the VRFs routing table, unless * there is a another table specified. */ table = link->network->dhcp_route_table; if (!link->network->dhcp_route_table_set && link->network->vrf != NULL) table = VRF(link->network->vrf)->table; r = sd_dhcp_lease_get_address(link->dhcp_lease, &address); if (r < 0) return log_link_warning_errno(link, r, "DHCP error: could not get address: %m"); n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes); if (n < 0) log_link_debug_errno(link, n, "DHCP error: could not get routes: %m"); for (i = 0; i < n; i++) { if (static_routes[i]->option == SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE) classless_route = true; if (static_routes[i]->option == SD_DHCP_OPTION_STATIC_ROUTE) static_route = true; } for (i = 0; i < n; i++) { _cleanup_route_free_ Route *route = NULL; /* if the DHCP server returns both a Classless Static Routes option and a Static Routes option, the DHCP client MUST ignore the Static Routes option. */ if (classless_route && static_routes[i]->option == SD_DHCP_OPTION_STATIC_ROUTE) continue; r = route_new(&route); if (r < 0) return log_link_error_errno(link, r, "Could not allocate route: %m"); route->family = AF_INET; route->protocol = RTPROT_DHCP; assert_se(sd_dhcp_route_get_gateway(static_routes[i], &route->gw.in) >= 0); assert_se(sd_dhcp_route_get_destination(static_routes[i], &route->dst.in) >= 0); assert_se(sd_dhcp_route_get_destination_prefix_length(static_routes[i], &route->dst_prefixlen) >= 0); route->priority = link->network->dhcp_route_metric; route->table = table; route->scope = route_scope_from_address(route, &address); r = route_configure(route, link, dhcp4_route_handler); if (r < 0) return log_link_warning_errno(link, r, "Could not set host route: %m"); link->dhcp4_messages++; } r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway); if (r == -ENODATA) log_link_info_errno(link, r, "DHCP: No routes received from DHCP server: %m"); else if (r < 0) log_link_warning_errno(link, r, "DHCP error: could not get gateway: %m"); /* According to RFC 3442: If the DHCP server returns both a Classless Static Routes option and a Router option, the DHCP client MUST ignore the Router option. */ if (classless_route && static_route) log_link_warning(link, "Classless static routes received from DHCP server: ignoring static-route option and router option"); if (r >= 0 && !classless_route) { _cleanup_route_free_ Route *route = NULL; _cleanup_route_free_ Route *route_gw = NULL; r = route_new(&route); if (r < 0) return log_link_error_errno(link, r, "Could not allocate route: %m"); route->protocol = RTPROT_DHCP; r = route_new(&route_gw); if (r < 0) return log_link_error_errno(link, r, "Could not allocate route: %m"); /* The dhcp netmask may mask out the gateway. Add an explicit * route for the gw host so that we can route no matter the * netmask or existing kernel route tables. */ route_gw->family = AF_INET; route_gw->dst.in = gateway; route_gw->dst_prefixlen = 32; route_gw->prefsrc.in = address; route_gw->scope = RT_SCOPE_LINK; route_gw->protocol = RTPROT_DHCP; route_gw->priority = link->network->dhcp_route_metric; route_gw->table = table; r = route_configure(route_gw, link, dhcp4_route_handler); if (r < 0) return log_link_warning_errno(link, r, "Could not set host route: %m"); link->dhcp4_messages++; route->family = AF_INET; route->gw.in = gateway; route->prefsrc.in = address; route->priority = link->network->dhcp_route_metric; route->table = table; r = route_configure(route, link, dhcp4_route_handler); if (r < 0) { log_link_warning_errno(link, r, "Could not set routes: %m"); link_enter_failed(link); return r; } link->dhcp4_messages++; } return 0; }
static int netdev_bridge_post_create(NetDev *netdev, Link *link, sd_netlink_message *m) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; Bridge *b; int r; assert(netdev); b = BRIDGE(netdev); assert(b); r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req, RTM_NEWLINK, netdev->ifindex); if (r < 0) return log_netdev_error_errno(netdev, r, "Could not allocate RTM_SETLINK message: %m"); r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK); if (r < 0) return log_link_error_errno(link, r, "Could not set netlink flags: %m"); r = sd_netlink_message_open_container(req, IFLA_LINKINFO); if (r < 0) return log_netdev_error_errno(netdev, r, "Could not append IFLA_PROTINFO attribute: %m"); r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, netdev_kind_to_string(netdev->kind)); if (r < 0) return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m"); /* convert to jiffes */ if (b->forward_delay != USEC_INFINITY) { r = sd_netlink_message_append_u32(req, IFLA_BR_FORWARD_DELAY, usec_to_jiffies(b->forward_delay)); if (r < 0) return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_FORWARD_DELAY attribute: %m"); } if (b->hello_time > 0) { r = sd_netlink_message_append_u32(req, IFLA_BR_HELLO_TIME, usec_to_jiffies(b->hello_time)); if (r < 0) return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_HELLO_TIME attribute: %m"); } if (b->max_age > 0) { r = sd_netlink_message_append_u32(req, IFLA_BR_MAX_AGE, usec_to_jiffies(b->max_age)); if (r < 0) return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_MAX_AGE attribute: %m"); } if (b->ageing_time != USEC_INFINITY) { r = sd_netlink_message_append_u32(req, IFLA_BR_AGEING_TIME, usec_to_jiffies(b->ageing_time)); if (r < 0) return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_AGEING_TIME attribute: %m"); } if (b->priority > 0) { r = sd_netlink_message_append_u16(req, IFLA_BR_PRIORITY, b->priority); if (r < 0) return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_PRIORITY attribute: %m"); } if (b->group_fwd_mask > 0) { r = sd_netlink_message_append_u16(req, IFLA_BR_GROUP_FWD_MASK, b->group_fwd_mask); if (r < 0) return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_GROUP_FWD_MASK attribute: %m"); } if (b->default_pvid != VLANID_INVALID) { r = sd_netlink_message_append_u16(req, IFLA_BR_VLAN_DEFAULT_PVID, b->default_pvid); if (r < 0) return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_VLAN_DEFAULT_PVID attribute: %m"); } if (b->mcast_querier >= 0) { r = sd_netlink_message_append_u8(req, IFLA_BR_MCAST_QUERIER, b->mcast_querier); if (r < 0) return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_MCAST_QUERIER attribute: %m"); } if (b->mcast_snooping >= 0) { r = sd_netlink_message_append_u8(req, IFLA_BR_MCAST_SNOOPING, b->mcast_snooping); if (r < 0) return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_MCAST_SNOOPING attribute: %m"); } if (b->vlan_filtering >= 0) { r = sd_netlink_message_append_u8(req, IFLA_BR_VLAN_FILTERING, b->vlan_filtering); if (r < 0) return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_VLAN_FILTERING attribute: %m"); } if (b->stp >= 0) { r = sd_netlink_message_append_u32(req, IFLA_BR_STP_STATE, b->stp); if (r < 0) return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_STP_STATE attribute: %m"); } r = sd_netlink_message_close_container(req); if (r < 0) return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m"); r = sd_netlink_message_close_container(req); if (r < 0) return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m"); r = sd_netlink_call_async(netdev->manager->rtnl, req, netdev_bridge_set_handler, netdev, 0, NULL); if (r < 0) return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m"); netdev_ref(netdev); return r; }
static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) { sd_dhcp_lease *lease; struct in_addr address; struct in_addr netmask; struct in_addr gateway; unsigned prefixlen; uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME; int r; assert(client); assert(link); r = sd_dhcp_client_get_lease(client, &lease); if (r < 0) return log_link_error_errno(link, r, "DHCP error: No lease: %m"); r = sd_dhcp_lease_get_address(lease, &address); if (r < 0) return log_link_error_errno(link, r, "DHCP error: No address: %m"); r = sd_dhcp_lease_get_netmask(lease, &netmask); if (r < 0) return log_link_error_errno(link, r, "DHCP error: No netmask: %m"); prefixlen = in_addr_netmask_to_prefixlen(&netmask); r = sd_dhcp_lease_get_router(lease, &gateway); if (r < 0 && r != -ENODATA) return log_link_error_errno(link, r, "DHCP error: Could not get gateway: %m"); if (r >= 0) log_struct(LOG_INFO, LOG_LINK_INTERFACE(link), LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u", ADDRESS_FMT_VAL(address), prefixlen, ADDRESS_FMT_VAL(gateway)), "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address), "PREFIXLEN=%u", prefixlen, "GATEWAY=%u.%u.%u.%u", ADDRESS_FMT_VAL(gateway), NULL); else log_struct(LOG_INFO, LOG_LINK_INTERFACE(link), LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u", ADDRESS_FMT_VAL(address), prefixlen), "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address), "PREFIXLEN=%u", prefixlen, NULL); link->dhcp_lease = sd_dhcp_lease_ref(lease); link_dirty(link); if (link->network->dhcp_use_mtu) { uint16_t mtu; r = sd_dhcp_lease_get_mtu(lease, &mtu); if (r >= 0) { r = link_set_mtu(link, mtu); if (r < 0) log_link_error_errno(link, r, "Failed to set MTU to %" PRIu16 ": %m", mtu); } } if (link->network->dhcp_use_hostname) { const char *hostname = NULL; if (link->network->dhcp_hostname) hostname = link->network->dhcp_hostname; else (void) sd_dhcp_lease_get_hostname(lease, &hostname); if (hostname) { r = manager_set_hostname(link->manager, hostname); if (r < 0) log_link_error_errno(link, r, "Failed to set transient hostname to '%s': %m", hostname); } } if (link->network->dhcp_use_timezone) { const char *tz = NULL; (void) sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz); if (tz) { r = manager_set_timezone(link->manager, tz); if (r < 0) log_link_error_errno(link, r, "Failed to set timezone to '%s': %m", tz); } } if (!link->network->dhcp_critical) { r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime); if (r < 0) { log_link_warning_errno(link, r, "DHCP error: no lifetime: %m"); return r; } } r = dhcp4_update_address(link, &address, &netmask, lifetime); if (r < 0) { log_link_warning_errno(link, r, "Could not update IP address: %m"); link_enter_failed(link); return r; } return 0; }
static int dhcp_lease_lost(Link *link) { _cleanup_address_free_ Address *address = NULL; struct in_addr addr; struct in_addr netmask; struct in_addr gateway; unsigned prefixlen = 0; int r; assert(link); assert(link->dhcp_lease); log_link_warning(link, "DHCP lease lost"); if (link->network->dhcp_routes) { struct sd_dhcp_route *routes; int n, i; n = sd_dhcp_lease_get_routes(link->dhcp_lease, &routes); if (n >= 0) { for (i = 0; i < n; i++) { _cleanup_route_free_ Route *route = NULL; r = route_new_dynamic(&route, RTPROT_UNSPEC); if (r >= 0) { route->family = AF_INET; route->in_addr.in = routes[i].gw_addr; route->dst_addr.in = routes[i].dst_addr; route->dst_prefixlen = routes[i].dst_prefixlen; route_drop(route, link, &link_route_drop_handler); } } } } r = address_new_dynamic(&address); if (r >= 0) { r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway); if (r >= 0) { _cleanup_route_free_ Route *route_gw = NULL; _cleanup_route_free_ Route *route = NULL; r = route_new_dynamic(&route_gw, RTPROT_UNSPEC); if (r >= 0) { route_gw->family = AF_INET; route_gw->dst_addr.in = gateway; route_gw->dst_prefixlen = 32; route_gw->scope = RT_SCOPE_LINK; route_drop(route_gw, link, &link_route_drop_handler); } r = route_new_dynamic(&route, RTPROT_UNSPEC); if (r >= 0) { route->family = AF_INET; route->in_addr.in = gateway; route_drop(route, link, &link_route_drop_handler); } } r = sd_dhcp_lease_get_address(link->dhcp_lease, &addr); if (r >= 0) { r = sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask); if (r >= 0) prefixlen = in_addr_netmask_to_prefixlen(&netmask); address->family = AF_INET; address->in_addr.in = addr; address->prefixlen = prefixlen; address_drop(address, link, &link_address_drop_handler); } } if (link->network->dhcp_mtu) { uint16_t mtu; r = sd_dhcp_lease_get_mtu(link->dhcp_lease, &mtu); if (r >= 0 && link->original_mtu != mtu) { r = link_set_mtu(link, link->original_mtu); if (r < 0) { log_link_warning(link, "DHCP error: could not reset MTU"); link_enter_failed(link); return r; } } } if (link->network->dhcp_hostname) { const char *hostname = NULL; if (!link->network->hostname) r = sd_dhcp_lease_get_hostname(link->dhcp_lease, &hostname); else hostname = link->network->hostname; if (r >= 0 || hostname) { r = link_set_hostname(link, hostname); if (r < 0) log_link_error_errno(link, r, "Failed to set transient hostname to '%s': %m", hostname); } } link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease); link->dhcp4_configured = false; return 0; }
static int link_set_dhcp_routes(Link *link) { struct in_addr gateway; struct sd_dhcp_route *static_routes; int r, n, i; assert(link); assert(link->dhcp_lease); r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway); if (r < 0 && r != -ENODATA) return log_link_warning_errno(link, r, "DHCP error: could not get gateway: %m"); if (r >= 0) { struct in_addr address; _cleanup_route_free_ Route *route = NULL; _cleanup_route_free_ Route *route_gw = NULL; r = sd_dhcp_lease_get_address(link->dhcp_lease, &address); if (r < 0) return log_link_warning_errno(link, r, "DHCP error: could not get address: %m"); r = route_new_dynamic(&route, RTPROT_DHCP); if (r < 0) return log_link_error_errno(link, r, "Could not allocate route: %m"); r = route_new_dynamic(&route_gw, RTPROT_DHCP); if (r < 0) return log_link_error_errno(link, r, "Could not allocate route: %m"); /* The dhcp netmask may mask out the gateway. Add an explicit * route for the gw host so that we can route no matter the * netmask or existing kernel route tables. */ route_gw->family = AF_INET; route_gw->dst_addr.in = gateway; route_gw->dst_prefixlen = 32; route_gw->prefsrc_addr.in = address; route_gw->scope = RT_SCOPE_LINK; route_gw->metrics = link->network->dhcp_route_metric; r = route_configure(route_gw, link, &dhcp4_route_handler); if (r < 0) return log_link_warning_errno(link, r, "Could not set host route: %m"); link->dhcp4_messages ++; route->family = AF_INET; route->in_addr.in = gateway; route->prefsrc_addr.in = address; route->metrics = link->network->dhcp_route_metric; r = route_configure(route, link, &dhcp4_route_handler); if (r < 0) { log_link_warning_errno(link, r, "Could not set routes: %m"); link_enter_failed(link); return r; } link->dhcp4_messages ++; } n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes); if (n == -ENODATA) return 0; if (n < 0) return log_link_warning_errno(link, n, "DHCP error: could not get routes: %m"); for (i = 0; i < n; i++) { _cleanup_route_free_ Route *route = NULL; r = route_new_dynamic(&route, RTPROT_DHCP); if (r < 0) return log_link_error_errno(link, r, "Could not allocate route: %m"); route->family = AF_INET; route->in_addr.in = static_routes[i].gw_addr; route->dst_addr.in = static_routes[i].dst_addr; route->dst_prefixlen = static_routes[i].dst_prefixlen; route->metrics = link->network->dhcp_route_metric; r = route_configure(route, link, &dhcp4_route_handler); if (r < 0) return log_link_warning_errno(link, r, "Could not set host route: %m"); link->dhcp4_messages ++; } return 0; }
int dhcp4_configure(Link *link) { int r; assert(link); assert(link->network); assert(link->network->dhcp & ADDRESS_FAMILY_IPV4); if (!link->dhcp_client) { r = sd_dhcp_client_new(&link->dhcp_client, link->network->dhcp_anonymize); if (r == -ENOMEM) return log_oom(); if (r < 0) return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to create DHCP4 client: %m"); } r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0); if (r < 0) return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to attach event: %m"); r = sd_dhcp_client_set_mac(link->dhcp_client, (const uint8_t *) &link->mac, sizeof (link->mac), ARPHRD_ETHER); if (r < 0) return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set MAC address: %m"); r = sd_dhcp_client_set_ifindex(link->dhcp_client, link->ifindex); if (r < 0) return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set ifindex: %m"); r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp4_handler, link); if (r < 0) return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set callback: %m"); r = sd_dhcp_client_set_request_broadcast(link->dhcp_client, link->network->dhcp_broadcast); if (r < 0) return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for broadcast: %m"); if (link->mtu) { r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu); if (r < 0) return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set MTU: %m"); } if (link->network->dhcp_use_mtu) { r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_INTERFACE_MTU); if (r < 0) return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for MTU: %m"); } /* NOTE: even if this variable is called "use", it also "sends" PRL * options, maybe there should be a different configuration variable * to send or not route options?. */ /* NOTE: when using Anonymize=yes, routes PRL options are sent * by default, so they don't need to be added here. */ if (link->network->dhcp_use_routes && !link->network->dhcp_anonymize) { r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_STATIC_ROUTE); if (r < 0) return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for static route: %m"); r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE); if (r < 0) return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for classless static route: %m"); } if (link->network->dhcp_use_ntp) { r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_NTP_SERVER); if (r < 0) return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for NTP server: %m"); } if (link->network->dhcp_use_timezone) { r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_NEW_TZDB_TIMEZONE); if (r < 0) return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for timezone: %m"); } r = dhcp4_set_hostname(link); if (r < 0) return r; if (link->network->dhcp_vendor_class_identifier) { r = sd_dhcp_client_set_vendor_class_identifier(link->dhcp_client, link->network->dhcp_vendor_class_identifier); if (r < 0) return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set vendor class identifier: %m"); } if (link->network->dhcp_user_class) { r = sd_dhcp_client_set_user_class(link->dhcp_client, (const char **) link->network->dhcp_user_class); if (r < 0) return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set user class: %m"); } if (link->network->dhcp_client_port) { r = sd_dhcp_client_set_client_port(link->dhcp_client, link->network->dhcp_client_port); if (r < 0) return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set listen port: %m"); } return dhcp4_set_client_identifier(link); }
static int append_vlan_info_data(Link *const link, sd_netlink_message *req, uint16_t pvid, const uint32_t *br_vid_bitmap, const uint32_t *br_untagged_bitmap) { struct bridge_vlan_info br_vlan; int i, j, k, r, done, cnt; uint16_t begin, end; bool untagged = false; assert(link); assert(req); assert(br_vid_bitmap); assert(br_untagged_bitmap); i = cnt = -1; begin = end = UINT16_MAX; for (k = 0; k < BRIDGE_VLAN_BITMAP_LEN; k++) { unsigned base_bit; uint32_t vid_map = br_vid_bitmap[k]; uint32_t untagged_map = br_untagged_bitmap[k]; base_bit = k * 32; i = -1; done = 0; do { j = find_next_bit(i, vid_map); if (j > 0) { /* first hit of any bit */ if (begin == UINT16_MAX && end == UINT16_MAX) { begin = end = j - 1 + base_bit; untagged = is_bit_set(j - 1, untagged_map); goto next; } /* this bit is a continuation of prior bits */ if (j - 2 + base_bit == end && untagged == is_bit_set(j - 1, untagged_map) && (uint16_t)j - 1 + base_bit != pvid && (uint16_t)begin != pvid) { end++; goto next; } } else done = 1; if (begin != UINT16_MAX) { cnt++; if (done && k < BRIDGE_VLAN_BITMAP_LEN - 1) break; br_vlan.flags = 0; if (untagged) br_vlan.flags |= BRIDGE_VLAN_INFO_UNTAGGED; if (begin == end) { br_vlan.vid = begin; if (begin == pvid) br_vlan.flags |= BRIDGE_VLAN_INFO_PVID; r = sd_netlink_message_append_data(req, IFLA_BRIDGE_VLAN_INFO, &br_vlan, sizeof(br_vlan)); if (r < 0) return log_link_error_errno(link, r, "Could not append IFLA_BRIDGE_VLAN_INFO attribute: %m"); } else { br_vlan.vid = begin; br_vlan.flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN; r = sd_netlink_message_append_data(req, IFLA_BRIDGE_VLAN_INFO, &br_vlan, sizeof(br_vlan)); if (r < 0) return log_link_error_errno(link, r, "Could not append IFLA_BRIDGE_VLAN_INFO attribute: %m"); br_vlan.vid = end; br_vlan.flags &= ~BRIDGE_VLAN_INFO_RANGE_BEGIN; br_vlan.flags |= BRIDGE_VLAN_INFO_RANGE_END; r = sd_netlink_message_append_data(req, IFLA_BRIDGE_VLAN_INFO, &br_vlan, sizeof(br_vlan)); if (r < 0) return log_link_error_errno(link, r, "Could not append IFLA_BRIDGE_VLAN_INFO attribute: %m"); } if (done) break; } if (j > 0) { begin = end = j - 1 + base_bit; untagged = is_bit_set(j - 1, untagged_map); } next: i = j; } while (!done); } if (!cnt) return -EINVAL; return cnt; }
static int link_set_dhcp_routes(Link *link) { _cleanup_free_ sd_dhcp_route **static_routes = NULL; bool classless_route = false, static_route = false; const struct in_addr *router; struct in_addr address; int r, n, i; uint32_t table; assert(link); if (!link->dhcp_lease) /* link went down while we configured the IP addresses? */ return 0; if (!link->network) /* link went down while we configured the IP addresses? */ return 0; if (!link->network->dhcp_use_routes) return 0; table = link_get_dhcp_route_table(link); r = sd_dhcp_lease_get_address(link->dhcp_lease, &address); if (r < 0) return log_link_warning_errno(link, r, "DHCP error: could not get address: %m"); n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes); if (n == -ENODATA) log_link_debug_errno(link, n, "DHCP: No routes received from DHCP server: %m"); else if (n < 0) log_link_debug_errno(link, n, "DHCP error: could not get routes: %m"); for (i = 0; i < n; i++) { switch (sd_dhcp_route_get_option(static_routes[i])) { case SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE: classless_route = true; break; case SD_DHCP_OPTION_STATIC_ROUTE: static_route = true; break; } } for (i = 0; i < n; i++) { _cleanup_(route_freep) Route *route = NULL; /* if the DHCP server returns both a Classless Static Routes option and a Static Routes option, the DHCP client MUST ignore the Static Routes option. */ if (classless_route && sd_dhcp_route_get_option(static_routes[i]) != SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE) continue; r = route_new(&route); if (r < 0) return log_link_error_errno(link, r, "Could not allocate route: %m"); route->family = AF_INET; route->protocol = RTPROT_DHCP; assert_se(sd_dhcp_route_get_gateway(static_routes[i], &route->gw.in) >= 0); assert_se(sd_dhcp_route_get_destination(static_routes[i], &route->dst.in) >= 0); assert_se(sd_dhcp_route_get_destination_prefix_length(static_routes[i], &route->dst_prefixlen) >= 0); route->priority = link->network->dhcp_route_metric; route->table = table; route->scope = route_scope_from_address(route, &address); r = route_configure(route, link, dhcp4_route_handler); if (r < 0) return log_link_warning_errno(link, r, "Could not set host route: %m"); link->dhcp4_messages++; } r = sd_dhcp_lease_get_router(link->dhcp_lease, &router); if (IN_SET(r, 0, -ENODATA)) log_link_info(link, "DHCP: No gateway received from DHCP server."); else if (r < 0) log_link_warning_errno(link, r, "DHCP error: could not get gateway: %m"); else if (in4_addr_is_null(&router[0])) log_link_info(link, "DHCP: Received gateway is null."); /* According to RFC 3442: If the DHCP server returns both a Classless Static Routes option and a Router option, the DHCP client MUST ignore the Router option. */ if (classless_route && static_route) log_link_warning(link, "Classless static routes received from DHCP server: ignoring static-route option and router option"); if (r > 0 && !classless_route && !in4_addr_is_null(&router[0])) { _cleanup_(route_freep) Route *route = NULL, *route_gw = NULL; r = route_new(&route_gw); if (r < 0) return log_link_error_errno(link, r, "Could not allocate route: %m"); /* The dhcp netmask may mask out the gateway. Add an explicit * route for the gw host so that we can route no matter the * netmask or existing kernel route tables. */ route_gw->family = AF_INET; route_gw->dst.in = router[0]; route_gw->dst_prefixlen = 32; route_gw->prefsrc.in = address; route_gw->scope = RT_SCOPE_LINK; route_gw->protocol = RTPROT_DHCP; route_gw->priority = link->network->dhcp_route_metric; route_gw->table = table; r = route_configure(route_gw, link, dhcp4_route_handler); if (r < 0) return log_link_warning_errno(link, r, "Could not set host route: %m"); link->dhcp4_messages++; r = route_new(&route); if (r < 0) return log_link_error_errno(link, r, "Could not allocate route: %m"); route->family = AF_INET; route->gw.in = router[0]; route->prefsrc.in = address; route->protocol = RTPROT_DHCP; route->priority = link->network->dhcp_route_metric; route->table = table; r = route_configure(route, link, dhcp4_route_handler); if (r < 0) { log_link_warning_errno(link, r, "Could not set routes: %m"); link_enter_failed(link); return r; } link->dhcp4_messages++; } return 0; }
static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) { const struct in_addr *router; sd_dhcp_lease *lease; struct in_addr address; struct in_addr netmask; unsigned prefixlen; uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME; int r; assert(client); assert(link); r = sd_dhcp_client_get_lease(client, &lease); if (r < 0) return log_link_error_errno(link, r, "DHCP error: No lease: %m"); r = sd_dhcp_lease_get_address(lease, &address); if (r < 0) return log_link_error_errno(link, r, "DHCP error: No address: %m"); r = sd_dhcp_lease_get_netmask(lease, &netmask); if (r < 0) return log_link_error_errno(link, r, "DHCP error: No netmask: %m"); prefixlen = in4_addr_netmask_to_prefixlen(&netmask); r = sd_dhcp_lease_get_router(lease, &router); if (r < 0 && r != -ENODATA) return log_link_error_errno(link, r, "DHCP error: Could not get gateway: %m"); if (r > 0 && !in4_addr_is_null(&router[0])) log_struct(LOG_INFO, LOG_LINK_INTERFACE(link), LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u", ADDRESS_FMT_VAL(address), prefixlen, ADDRESS_FMT_VAL(router[0])), "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address), "PREFIXLEN=%u", prefixlen, "GATEWAY=%u.%u.%u.%u", ADDRESS_FMT_VAL(router[0])); else log_struct(LOG_INFO, LOG_LINK_INTERFACE(link), LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u", ADDRESS_FMT_VAL(address), prefixlen), "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address), "PREFIXLEN=%u", prefixlen); link->dhcp_lease = sd_dhcp_lease_ref(lease); link_dirty(link); if (link->network->dhcp_use_mtu) { uint16_t mtu; r = sd_dhcp_lease_get_mtu(lease, &mtu); if (r >= 0) { r = link_set_mtu(link, mtu, true); if (r < 0) log_link_error_errno(link, r, "Failed to set MTU to %" PRIu16 ": %m", mtu); } } if (link->network->dhcp_use_hostname) { const char *dhcpname = NULL; _cleanup_free_ char *hostname = NULL; if (link->network->dhcp_hostname) dhcpname = link->network->dhcp_hostname; else (void) sd_dhcp_lease_get_hostname(lease, &dhcpname); if (dhcpname) { r = shorten_overlong(dhcpname, &hostname); if (r < 0) log_link_warning_errno(link, r, "Unable to shorten overlong DHCP hostname '%s', ignoring: %m", dhcpname); if (r == 1) log_link_notice(link, "Overlong DHCP hostname received, shortened from '%s' to '%s'", dhcpname, hostname); } if (hostname) { r = manager_set_hostname(link->manager, hostname); if (r < 0) log_link_error_errno(link, r, "Failed to set transient hostname to '%s': %m", hostname); } } if (link->network->dhcp_use_timezone) { const char *tz = NULL; (void) sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz); if (tz) { r = manager_set_timezone(link->manager, tz); if (r < 0) log_link_error_errno(link, r, "Failed to set timezone to '%s': %m", tz); } } if (!link->network->dhcp_critical) { r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime); if (r < 0) return log_link_warning_errno(link, r, "DHCP error: no lifetime: %m"); } r = dhcp4_update_address(link, &address, &netmask, lifetime); if (r < 0) { log_link_warning_errno(link, r, "Could not update IP address: %m"); link_enter_failed(link); return r; } return 0; }
static void ndisc_router_process_autonomous_prefix(Link *link, sd_ndisc_router *rt) { _cleanup_address_free_ Address *address = NULL; uint32_t lifetime_valid, lifetime_preferred; unsigned prefixlen; int r; assert(link); assert(rt); r = sd_ndisc_router_prefix_get_prefixlen(rt, &prefixlen); if (r < 0) { log_link_error_errno(link, r, "Failed to get prefix length: %m"); return; } r = sd_ndisc_router_prefix_get_valid_lifetime(rt, &lifetime_valid); if (r < 0) { log_link_error_errno(link, r, "Failed to get prefix valid lifetime: %m"); return; } r = sd_ndisc_router_prefix_get_preferred_lifetime(rt, &lifetime_preferred); if (r < 0) { log_link_error_errno(link, r, "Failed to get prefix preferred lifetime: %m"); return; } r = address_new(&address); if (r < 0) { log_link_error_errno(link, r, "Could not allocate address: %m"); return; } address->family = AF_INET6; r = sd_ndisc_router_prefix_get_address(rt, &address->in_addr.in6); if (r < 0) { log_link_error_errno(link, r, "Failed to get prefix address: %m"); return; } if (in_addr_is_null(AF_INET6, (const union in_addr_union *) &link->network->ipv6_token) == 0) memcpy(((char *)&address->in_addr.in6) + 8, ((char *)&link->network->ipv6_token) + 8, 8); else { /* see RFC4291 section 2.5.1 */ address->in_addr.in6.s6_addr[8] = link->mac.ether_addr_octet[0]; address->in_addr.in6.s6_addr[8] ^= 1 << 1; address->in_addr.in6.s6_addr[9] = link->mac.ether_addr_octet[1]; address->in_addr.in6.s6_addr[10] = link->mac.ether_addr_octet[2]; address->in_addr.in6.s6_addr[11] = 0xff; address->in_addr.in6.s6_addr[12] = 0xfe; address->in_addr.in6.s6_addr[13] = link->mac.ether_addr_octet[3]; address->in_addr.in6.s6_addr[14] = link->mac.ether_addr_octet[4]; address->in_addr.in6.s6_addr[15] = link->mac.ether_addr_octet[5]; } address->prefixlen = prefixlen; address->flags = IFA_F_NOPREFIXROUTE|IFA_F_MANAGETEMPADDR; address->cinfo.ifa_prefered = lifetime_preferred; address->cinfo.ifa_valid = lifetime_valid; r = address_configure(address, link, ndisc_netlink_handler, true); if (r < 0) { log_link_warning_errno(link, r, "Could not set SLAAC address: %m"); link_enter_failed(link); return; } link->ndisc_messages++; }
static void ndisc_router_process_route(Link *link, sd_ndisc_router *rt) { _cleanup_route_free_ Route *route = NULL; struct in6_addr gateway; uint32_t lifetime; unsigned preference, prefixlen; usec_t time_now; int r; assert(link); r = sd_ndisc_router_route_get_lifetime(rt, &lifetime); if (r < 0) { log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m"); return; } if (lifetime == 0) return; r = sd_ndisc_router_get_address(rt, &gateway); if (r < 0) { log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m"); return; } r = sd_ndisc_router_route_get_prefixlen(rt, &prefixlen); if (r < 0) { log_link_warning_errno(link, r, "Failed to get route prefix length: %m"); return; } r = sd_ndisc_router_route_get_preference(rt, &preference); if (r < 0) { log_link_warning_errno(link, r, "Failed to get default router preference from RA: %m"); return; } r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now); if (r < 0) { log_link_warning_errno(link, r, "Failed to get RA timestamp: %m"); return; } r = route_new(&route); if (r < 0) { log_link_error_errno(link, r, "Could not allocate route: %m"); return; } route->family = AF_INET6; route->table = RT_TABLE_MAIN; route->protocol = RTPROT_RA; route->pref = preference; route->gw.in6 = gateway; route->dst_prefixlen = prefixlen; route->lifetime = time_now + lifetime * USEC_PER_SEC; r = sd_ndisc_router_route_get_address(rt, &route->dst.in6); if (r < 0) { log_link_error_errno(link, r, "Failed to get route address: %m"); return; } r = route_configure(route, link, ndisc_netlink_handler); if (r < 0) { log_link_warning_errno(link, r, "Could not set additional route: %m"); link_enter_failed(link); return; } link->ndisc_messages++; }
static int netdev_bridge_post_create(NetDev *netdev, Link *link, sd_netlink_message *m) { _cleanup_netlink_message_unref_ sd_netlink_message *req = NULL; Bridge *b; int r; assert(netdev); b = BRIDGE(netdev); assert(b); r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req, RTM_NEWLINK, netdev->ifindex); if (r < 0) return log_netdev_error_errno(netdev, r, "Could not allocate RTM_SETLINK message: %m"); r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK); if (r < 0) return log_link_error_errno(link, r, "Could not set netlink flags: %m"); r = sd_netlink_message_open_container(req, IFLA_LINKINFO); if (r < 0) return log_netdev_error_errno(netdev, r, "Could not append IFLA_PROTINFO attribute: %m"); r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, netdev_kind_to_string(netdev->kind)); if (r < 0) return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m"); /* convert to jiffes */ if (b->forward_delay > 0) { r = sd_netlink_message_append_u32(req, IFLA_BR_FORWARD_DELAY, usec_to_jiffies(b->forward_delay)); if (r < 0) return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_FORWARD_DELAY attribute: %m"); } if (b->hello_time > 0) { r = sd_netlink_message_append_u32(req, IFLA_BR_HELLO_TIME, usec_to_jiffies(b->hello_time)); if (r < 0) return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_HELLO_TIME attribute: %m"); } if (b->max_age > 0) { r = sd_netlink_message_append_u32(req, IFLA_BR_MAX_AGE, usec_to_jiffies(b->max_age)); if (r < 0) return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_MAX_AGE attribute: %m"); } r = sd_netlink_message_close_container(req); if (r < 0) return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m"); r = sd_netlink_message_close_container(req); if (r < 0) return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m"); r = sd_netlink_call_async(netdev->manager->rtnl, req, netdev_bridge_set_handler, netdev, 0, NULL); if (r < 0) return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m"); netdev_ref(netdev); return r; }