| /* SPDX-License-Identifier: LGPL-2.1+ */ |
| |
| #include <netinet/in.h> |
| #include <linux/if.h> |
| #include <linux/if_arp.h> |
| #include <unistd.h> |
| |
| #include "alloc-util.h" |
| #include "bond.h" |
| #include "bridge.h" |
| #include "bus-util.h" |
| #include "dhcp-identifier.h" |
| #include "dhcp-lease-internal.h" |
| #include "env-file.h" |
| #include "ethtool-util.h" |
| #include "fd-util.h" |
| #include "fileio.h" |
| #include "ipvlan.h" |
| #include "missing_network.h" |
| #include "netlink-util.h" |
| #include "network-internal.h" |
| #include "networkd-can.h" |
| #include "networkd-dhcp-server.h" |
| #include "networkd-dhcp4.h" |
| #include "networkd-dhcp6.h" |
| #include "networkd-ipv4ll.h" |
| #include "networkd-ipv6-proxy-ndp.h" |
| #include "networkd-link-bus.h" |
| #include "networkd-link.h" |
| #include "networkd-lldp-tx.h" |
| #include "networkd-manager.h" |
| #include "networkd-ndisc.h" |
| #include "networkd-neighbor.h" |
| #include "networkd-radv.h" |
| #include "networkd-routing-policy-rule.h" |
| #include "networkd-wifi.h" |
| #include "qdisc.h" |
| #include "set.h" |
| #include "socket-util.h" |
| #include "stat-util.h" |
| #include "stdio-util.h" |
| #include "string-table.h" |
| #include "strv.h" |
| #include "sysctl-util.h" |
| #include "tmpfile-util.h" |
| #include "udev-util.h" |
| #include "util.h" |
| #include "vrf.h" |
| |
| uint32_t link_get_vrf_table(Link *link) { |
| return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN; |
| } |
| |
| uint32_t link_get_dhcp_route_table(Link *link) { |
| /* When the interface is part of an VRF use the VRFs routing table, unless |
| * another table is explicitly specified. */ |
| if (link->network->dhcp_route_table_set) |
| return link->network->dhcp_route_table; |
| return link_get_vrf_table(link); |
| } |
| |
| uint32_t link_get_ipv6_accept_ra_route_table(Link *link) { |
| if (link->network->ipv6_accept_ra_route_table_set) |
| return link->network->ipv6_accept_ra_route_table; |
| return link_get_vrf_table(link); |
| } |
| |
| DUID* link_get_duid(Link *link) { |
| if (link->network->duid.type != _DUID_TYPE_INVALID) |
| return &link->network->duid; |
| else |
| return &link->manager->duid; |
| } |
| |
| static bool link_dhcp6_enabled(Link *link) { |
| assert(link); |
| |
| if (!socket_ipv6_is_supported()) |
| return false; |
| |
| if (link->flags & IFF_LOOPBACK) |
| return false; |
| |
| if (!link->network) |
| return false; |
| |
| if (link->network->bond) |
| return false; |
| |
| if (link->iftype == ARPHRD_CAN) |
| return false; |
| |
| return link->network->dhcp & ADDRESS_FAMILY_IPV6; |
| } |
| |
| static bool link_dhcp4_enabled(Link *link) { |
| assert(link); |
| |
| if (link->flags & IFF_LOOPBACK) |
| return false; |
| |
| if (!link->network) |
| return false; |
| |
| if (link->network->bond) |
| return false; |
| |
| if (link->iftype == ARPHRD_CAN) |
| return false; |
| |
| return link->network->dhcp & ADDRESS_FAMILY_IPV4; |
| } |
| |
| static bool link_dhcp4_server_enabled(Link *link) { |
| assert(link); |
| |
| if (link->flags & IFF_LOOPBACK) |
| return false; |
| |
| if (!link->network) |
| return false; |
| |
| if (link->network->bond) |
| return false; |
| |
| if (link->iftype == ARPHRD_CAN) |
| return false; |
| |
| return link->network->dhcp_server; |
| } |
| |
| bool link_ipv4ll_enabled(Link *link, AddressFamily mask) { |
| assert(link); |
| assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0); |
| |
| if (link->flags & IFF_LOOPBACK) |
| return false; |
| |
| if (!link->network) |
| return false; |
| |
| if (link->iftype == ARPHRD_CAN) |
| return false; |
| |
| if (STRPTR_IN_SET(link->kind, |
| "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti", |
| "vti6", "nlmon", "xfrm")) |
| return false; |
| |
| /* L3 or L3S mode do not support ARP. */ |
| if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S)) |
| return false; |
| |
| if (link->network->bond) |
| return false; |
| |
| return link->network->link_local & mask; |
| } |
| |
| static bool link_ipv6ll_enabled(Link *link) { |
| assert(link); |
| |
| if (!socket_ipv6_is_supported()) |
| return false; |
| |
| if (link->flags & IFF_LOOPBACK) |
| return false; |
| |
| if (!link->network) |
| return false; |
| |
| if (link->iftype == ARPHRD_CAN) |
| return false; |
| |
| if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon")) |
| return false; |
| |
| if (link->network->bond) |
| return false; |
| |
| return link->network->link_local & ADDRESS_FAMILY_IPV6; |
| } |
| |
| static bool link_ipv6_enabled(Link *link) { |
| assert(link); |
| |
| if (!socket_ipv6_is_supported()) |
| return false; |
| |
| if (link->network->bond) |
| return false; |
| |
| if (link->iftype == ARPHRD_CAN) |
| return false; |
| |
| /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */ |
| if (link_ipv6ll_enabled(link)) |
| return true; |
| |
| if (network_has_static_ipv6_configurations(link->network)) |
| return true; |
| |
| return false; |
| } |
| |
| static bool link_radv_enabled(Link *link) { |
| assert(link); |
| |
| if (!link_ipv6ll_enabled(link)) |
| return false; |
| |
| return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE; |
| } |
| |
| static bool link_ipv4_forward_enabled(Link *link) { |
| assert(link); |
| |
| if (link->flags & IFF_LOOPBACK) |
| return false; |
| |
| if (!link->network) |
| return false; |
| |
| if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID) |
| return false; |
| |
| return link->network->ip_forward & ADDRESS_FAMILY_IPV4; |
| } |
| |
| static bool link_ipv6_forward_enabled(Link *link) { |
| assert(link); |
| |
| if (!socket_ipv6_is_supported()) |
| return false; |
| |
| if (link->flags & IFF_LOOPBACK) |
| return false; |
| |
| if (!link->network) |
| return false; |
| |
| if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID) |
| return false; |
| |
| return link->network->ip_forward & ADDRESS_FAMILY_IPV6; |
| } |
| |
| static bool link_proxy_arp_enabled(Link *link) { |
| assert(link); |
| |
| if (link->flags & IFF_LOOPBACK) |
| return false; |
| |
| if (!link->network) |
| return false; |
| |
| if (link->network->proxy_arp < 0) |
| return false; |
| |
| return true; |
| } |
| |
| static bool link_ipv6_accept_ra_enabled(Link *link) { |
| assert(link); |
| |
| if (!socket_ipv6_is_supported()) |
| return false; |
| |
| if (link->flags & IFF_LOOPBACK) |
| return false; |
| |
| if (!link->network) |
| return false; |
| |
| if (!link_ipv6ll_enabled(link)) |
| return false; |
| |
| /* If unset use system default (enabled if local forwarding is disabled. |
| * disabled if local forwarding is enabled). |
| * If set, ignore or enforce RA independent of local forwarding state. |
| */ |
| if (link->network->ipv6_accept_ra < 0) |
| /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */ |
| return !link_ipv6_forward_enabled(link); |
| else if (link->network->ipv6_accept_ra > 0) |
| /* accept RA even if ip_forward is enabled */ |
| return true; |
| else |
| /* ignore RA */ |
| return false; |
| } |
| |
| static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) { |
| assert(link); |
| |
| if (!socket_ipv6_is_supported()) |
| return _IPV6_PRIVACY_EXTENSIONS_INVALID; |
| |
| if (link->flags & IFF_LOOPBACK) |
| return _IPV6_PRIVACY_EXTENSIONS_INVALID; |
| |
| if (!link->network) |
| return _IPV6_PRIVACY_EXTENSIONS_INVALID; |
| |
| return link->network->ipv6_privacy_extensions; |
| } |
| |
| static int link_update_ipv6_sysctl(Link *link) { |
| bool enabled; |
| int r; |
| |
| if (link->flags & IFF_LOOPBACK) |
| return 0; |
| |
| enabled = link_ipv6_enabled(link); |
| if (enabled) { |
| r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Cannot enable IPv6: %m"); |
| |
| log_link_info(link, "IPv6 successfully enabled"); |
| } |
| |
| return 0; |
| } |
| |
| static bool link_is_enslaved(Link *link) { |
| if (link->flags & IFF_SLAVE) |
| /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */ |
| return true; |
| |
| if (!link->network) |
| return false; |
| |
| if (link->master_ifindex > 0 && link->network->bridge) |
| return true; |
| |
| /* TODO: add conditions for other netdevs. */ |
| |
| return false; |
| } |
| |
| static void link_update_master_operstate(Link *link, NetDev *netdev) { |
| Link *master; |
| |
| if (!netdev) |
| return; |
| |
| if (link_get(link->manager, netdev->ifindex, &master) < 0) |
| return; |
| |
| link_update_operstate(master, true); |
| } |
| |
| void link_update_operstate(Link *link, bool also_update_master) { |
| LinkOperationalState operstate; |
| LinkCarrierState carrier_state; |
| LinkAddressState address_state; |
| _cleanup_strv_free_ char **p = NULL; |
| uint8_t scope = RT_SCOPE_NOWHERE; |
| bool changed = false; |
| Address *address; |
| Iterator i; |
| |
| assert(link); |
| |
| if (link->kernel_operstate == IF_OPER_DORMANT) |
| carrier_state = LINK_CARRIER_STATE_DORMANT; |
| else if (link_has_carrier(link)) { |
| if (link_is_enslaved(link)) |
| carrier_state = LINK_CARRIER_STATE_ENSLAVED; |
| else |
| carrier_state = LINK_CARRIER_STATE_CARRIER; |
| } else if (link->flags & IFF_UP) |
| carrier_state = LINK_CARRIER_STATE_NO_CARRIER; |
| else |
| carrier_state = LINK_CARRIER_STATE_OFF; |
| |
| if (carrier_state >= LINK_CARRIER_STATE_CARRIER) { |
| Link *slave; |
| |
| SET_FOREACH(slave, link->slaves, i) { |
| link_update_operstate(slave, false); |
| |
| if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER) |
| carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER; |
| } |
| } |
| |
| SET_FOREACH(address, link->addresses, i) { |
| if (!address_is_ready(address)) |
| continue; |
| |
| if (address->scope < scope) |
| scope = address->scope; |
| } |
| |
| /* for operstate we also take foreign addresses into account */ |
| SET_FOREACH(address, link->addresses_foreign, i) { |
| if (!address_is_ready(address)) |
| continue; |
| |
| if (address->scope < scope) |
| scope = address->scope; |
| } |
| |
| if (scope < RT_SCOPE_SITE) |
| /* universally accessible addresses found */ |
| address_state = LINK_ADDRESS_STATE_ROUTABLE; |
| else if (scope < RT_SCOPE_HOST) |
| /* only link or site local addresses found */ |
| address_state = LINK_ADDRESS_STATE_DEGRADED; |
| else |
| /* no useful addresses found */ |
| address_state = LINK_ADDRESS_STATE_OFF; |
| |
| /* Mapping of address and carrier state vs operational state |
| * carrier state |
| * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved |
| * ------------------------------------------------------------------------------ |
| * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved |
| * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved |
| * routable | off | no-carrier | dormant | degraded-carrier | routable | routable |
| */ |
| |
| if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF) |
| operstate = (LinkOperationalState) carrier_state; |
| else if (address_state == LINK_ADDRESS_STATE_ROUTABLE) |
| operstate = LINK_OPERSTATE_ROUTABLE; |
| else if (carrier_state == LINK_CARRIER_STATE_CARRIER) |
| operstate = LINK_OPERSTATE_DEGRADED; |
| else |
| operstate = LINK_OPERSTATE_ENSLAVED; |
| |
| if (link->carrier_state != carrier_state) { |
| link->carrier_state = carrier_state; |
| changed = true; |
| if (strv_extend(&p, "CarrierState") < 0) |
| log_oom(); |
| } |
| |
| if (link->address_state != address_state) { |
| link->address_state = address_state; |
| changed = true; |
| if (strv_extend(&p, "AddressState") < 0) |
| log_oom(); |
| } |
| |
| if (link->operstate != operstate) { |
| link->operstate = operstate; |
| changed = true; |
| if (strv_extend(&p, "OperationalState") < 0) |
| log_oom(); |
| } |
| |
| if (p) |
| link_send_changed_strv(link, p); |
| if (changed) |
| link_dirty(link); |
| |
| if (also_update_master && link->network) { |
| link_update_master_operstate(link, link->network->bond); |
| link_update_master_operstate(link, link->network->bridge); |
| } |
| } |
| |
| #define FLAG_STRING(string, flag, old, new) \ |
| (((old ^ new) & flag) \ |
| ? ((old & flag) ? (" -" string) : (" +" string)) \ |
| : "") |
| |
| static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) { |
| unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags; |
| uint8_t operstate; |
| int r; |
| |
| assert(link); |
| |
| r = sd_rtnl_message_link_get_flags(m, &flags); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not get link flags: %m"); |
| |
| r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate); |
| if (r < 0) |
| /* if we got a message without operstate, take it to mean |
| the state was unchanged */ |
| operstate = link->kernel_operstate; |
| |
| if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate)) |
| return 0; |
| |
| if (link->flags != flags) { |
| log_link_debug(link, "Flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s", |
| FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags), |
| FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags), |
| FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags), |
| FLAG_STRING("UP", IFF_UP, link->flags, flags), |
| FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags), |
| FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags), |
| FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags), |
| FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags), |
| FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags), |
| FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags), |
| FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags), |
| FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags), |
| FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags), |
| FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags), |
| FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags), |
| FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags), |
| FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags), |
| FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags), |
| FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags)); |
| |
| unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP | |
| IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING | |
| IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT | |
| IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL | |
| IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP | |
| IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO); |
| unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags); |
| unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags); |
| |
| /* link flags are currently at most 18 bits, let's align to |
| * printing 20 */ |
| if (unknown_flags_added) |
| log_link_debug(link, |
| "Unknown link flags gained: %#.5x (ignoring)", |
| unknown_flags_added); |
| |
| if (unknown_flags_removed) |
| log_link_debug(link, |
| "Unknown link flags lost: %#.5x (ignoring)", |
| unknown_flags_removed); |
| } |
| |
| link->flags = flags; |
| link->kernel_operstate = operstate; |
| |
| link_update_operstate(link, true); |
| |
| return 0; |
| } |
| |
| static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) { |
| _cleanup_(link_unrefp) Link *link = NULL; |
| const char *ifname, *kind = NULL; |
| unsigned short iftype; |
| int r, ifindex; |
| uint16_t type; |
| |
| assert(manager); |
| assert(message); |
| assert(ret); |
| |
| /* check for link kind */ |
| r = sd_netlink_message_enter_container(message, IFLA_LINKINFO); |
| if (r == 0) { |
| (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind); |
| r = sd_netlink_message_exit_container(message); |
| if (r < 0) |
| return r; |
| } |
| |
| r = sd_netlink_message_get_type(message, &type); |
| if (r < 0) |
| return r; |
| else if (type != RTM_NEWLINK) |
| return -EINVAL; |
| |
| r = sd_rtnl_message_link_get_ifindex(message, &ifindex); |
| if (r < 0) |
| return r; |
| else if (ifindex <= 0) |
| return -EINVAL; |
| |
| r = sd_rtnl_message_link_get_type(message, &iftype); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname); |
| if (r < 0) |
| return r; |
| |
| link = new(Link, 1); |
| if (!link) |
| return -ENOMEM; |
| |
| *link = (Link) { |
| .n_ref = 1, |
| .manager = manager, |
| .state = LINK_STATE_PENDING, |
| .ifindex = ifindex, |
| .iftype = iftype, |
| |
| .n_dns = (unsigned) -1, |
| .dns_default_route = -1, |
| .llmnr = _RESOLVE_SUPPORT_INVALID, |
| .mdns = _RESOLVE_SUPPORT_INVALID, |
| .dnssec_mode = _DNSSEC_MODE_INVALID, |
| .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID, |
| }; |
| |
| link->ifname = strdup(ifname); |
| if (!link->ifname) |
| return -ENOMEM; |
| |
| if (kind) { |
| link->kind = strdup(kind); |
| if (!link->kind) |
| return -ENOMEM; |
| } |
| |
| r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex); |
| if (r < 0) |
| log_link_debug_errno(link, r, "New device has no master, continuing without"); |
| |
| r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac); |
| if (r < 0) |
| log_link_debug_errno(link, r, "MAC address not found for new device, continuing without"); |
| |
| r = ethtool_get_permanent_macaddr(NULL, link->ifname, &link->permanent_mac); |
| if (r < 0) |
| log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m"); |
| |
| r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names); |
| if (r < 0 && r != -ENODATA) |
| return r; |
| |
| if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0) |
| return -ENOMEM; |
| |
| if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0) |
| return -ENOMEM; |
| |
| if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0) |
| return -ENOMEM; |
| |
| r = hashmap_ensure_allocated(&manager->links, NULL); |
| if (r < 0) |
| return r; |
| |
| r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link); |
| if (r < 0) |
| return r; |
| |
| r = link_update_flags(link, message, false); |
| if (r < 0) |
| return r; |
| |
| *ret = TAKE_PTR(link); |
| |
| return 0; |
| } |
| |
| void link_ntp_settings_clear(Link *link) { |
| link->ntp = strv_free(link->ntp); |
| } |
| |
| void link_dns_settings_clear(Link *link) { |
| link->dns = mfree(link->dns); |
| link->n_dns = (unsigned) -1; |
| |
| link->search_domains = ordered_set_free_free(link->search_domains); |
| link->route_domains = ordered_set_free_free(link->route_domains); |
| |
| link->dns_default_route = -1; |
| link->llmnr = _RESOLVE_SUPPORT_INVALID; |
| link->mdns = _RESOLVE_SUPPORT_INVALID; |
| link->dnssec_mode = _DNSSEC_MODE_INVALID; |
| link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID; |
| |
| link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors); |
| } |
| |
| static void link_free_engines(Link *link) { |
| if (!link) |
| return; |
| |
| link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server); |
| link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client); |
| link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease); |
| link->dhcp_routes = set_free(link->dhcp_routes); |
| |
| link->lldp = sd_lldp_unref(link->lldp); |
| |
| ndisc_flush(link); |
| |
| link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll); |
| link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client); |
| link->ndisc = sd_ndisc_unref(link->ndisc); |
| link->radv = sd_radv_unref(link->radv); |
| } |
| |
| static Link *link_free(Link *link) { |
| Address *address; |
| |
| assert(link); |
| |
| link_ntp_settings_clear(link); |
| link_dns_settings_clear(link); |
| |
| link->routes = set_free_with_destructor(link->routes, route_free); |
| link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free); |
| |
| link->nexthops = set_free_with_destructor(link->nexthops, nexthop_free); |
| link->nexthops_foreign = set_free_with_destructor(link->nexthops_foreign, nexthop_free); |
| |
| link->neighbors = set_free_with_destructor(link->neighbors, neighbor_free); |
| link->neighbors_foreign = set_free_with_destructor(link->neighbors_foreign, neighbor_free); |
| |
| link->addresses = set_free_with_destructor(link->addresses, address_free); |
| link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free); |
| |
| while ((address = link->pool_addresses)) { |
| LIST_REMOVE(addresses, link->pool_addresses, address); |
| address_free(address); |
| } |
| |
| link_lldp_emit_stop(link); |
| link_free_engines(link); |
| free(link->lease_file); |
| free(link->lldp_file); |
| |
| free(link->ifname); |
| strv_free(link->alternative_names); |
| free(link->kind); |
| free(link->ssid); |
| |
| (void) unlink(link->state_file); |
| free(link->state_file); |
| |
| sd_device_unref(link->sd_device); |
| |
| hashmap_free(link->bound_to_links); |
| hashmap_free(link->bound_by_links); |
| |
| set_free_with_destructor(link->slaves, link_unref); |
| |
| network_unref(link->network); |
| |
| return mfree(link); |
| } |
| |
| DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free); |
| |
| int link_get(Manager *m, int ifindex, Link **ret) { |
| Link *link; |
| |
| assert(m); |
| assert(ifindex); |
| assert(ret); |
| |
| link = hashmap_get(m->links, INT_TO_PTR(ifindex)); |
| if (!link) |
| return -ENODEV; |
| |
| *ret = link; |
| |
| return 0; |
| } |
| |
| void link_set_state(Link *link, LinkState state) { |
| assert(link); |
| |
| if (link->state == state) |
| return; |
| |
| log_link_debug(link, "State changed: %s -> %s", |
| link_state_to_string(link->state), |
| link_state_to_string(state)); |
| |
| link->state = state; |
| |
| link_send_changed(link, "AdministrativeState", NULL); |
| } |
| |
| static void link_enter_unmanaged(Link *link) { |
| assert(link); |
| |
| link_set_state(link, LINK_STATE_UNMANAGED); |
| |
| link_dirty(link); |
| } |
| |
| int link_stop_clients(Link *link, bool may_keep_dhcp) { |
| int r = 0, k; |
| Address *ad; |
| |
| assert(link); |
| assert(link->manager); |
| assert(link->manager->event); |
| |
| dhcp4_release_old_lease(link); |
| |
| bool keep_dhcp = may_keep_dhcp && |
| link->network && |
| (link->manager->restarting || |
| FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP)); |
| |
| if (link->dhcp_client && !keep_dhcp) { |
| k = sd_dhcp_client_stop(link->dhcp_client); |
| if (k < 0) |
| r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m"); |
| } |
| |
| if (link->ipv4ll) { |
| k = sd_ipv4ll_stop(link->ipv4ll); |
| if (k < 0) |
| r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m"); |
| } |
| |
| if (link->network) |
| LIST_FOREACH(addresses, ad, link->network->static_addresses) |
| if (ad->acd && sd_ipv4acd_is_running(ad->acd) == 0) { |
| k = sd_ipv4acd_stop(ad->acd); |
| if (k < 0) |
| r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m"); |
| } |
| |
| if (link->dhcp6_client) { |
| k = sd_dhcp6_client_stop(link->dhcp6_client); |
| if (k < 0) |
| r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m"); |
| } |
| |
| if (link->ndisc) { |
| k = sd_ndisc_stop(link->ndisc); |
| if (k < 0) |
| r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m"); |
| } |
| |
| if (link->radv) { |
| k = sd_radv_stop(link->radv); |
| if (k < 0) |
| r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m"); |
| } |
| |
| link_lldp_emit_stop(link); |
| return r; |
| } |
| |
| void link_enter_failed(Link *link) { |
| assert(link); |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
| return; |
| |
| log_link_warning(link, "Failed"); |
| |
| link_set_state(link, LINK_STATE_FAILED); |
| |
| link_stop_clients(link, false); |
| |
| link_dirty(link); |
| } |
| |
| static int link_join_netdevs_after_configured(Link *link) { |
| NetDev *netdev; |
| Iterator i; |
| int r; |
| |
| HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) { |
| if (netdev->ifindex > 0) |
| /* Assume already enslaved. */ |
| continue; |
| |
| if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED) |
| continue; |
| |
| log_struct(LOG_DEBUG, |
| LOG_LINK_INTERFACE(link), |
| LOG_NETDEV_INTERFACE(netdev), |
| LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname)); |
| |
| r = netdev_join(netdev, link, NULL); |
| if (r < 0) |
| return log_struct_errno(LOG_WARNING, r, |
| LOG_LINK_INTERFACE(link), |
| LOG_NETDEV_INTERFACE(netdev), |
| LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname)); |
| } |
| |
| return 0; |
| } |
| |
| static void link_enter_configured(Link *link) { |
| assert(link); |
| assert(link->network); |
| |
| if (link->state != LINK_STATE_CONFIGURING) |
| return; |
| |
| link_set_state(link, LINK_STATE_CONFIGURED); |
| |
| (void) link_join_netdevs_after_configured(link); |
| |
| link_dirty(link); |
| } |
| |
| static int link_request_set_routing_policy_rule(Link *link) { |
| RoutingPolicyRule *rule, *rrule = NULL; |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| |
| link->routing_policy_rules_configured = false; |
| |
| LIST_FOREACH(rules, rule, link->network->rules) { |
| r = routing_policy_rule_get(link->manager, rule, &rrule); |
| if (r >= 0) { |
| if (r == 0) |
| (void) routing_policy_rule_make_local(link->manager, rrule); |
| continue; |
| } |
| |
| r = routing_policy_rule_configure(rule, link, NULL); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not set routing policy rules: %m"); |
| if (r > 0) |
| link->routing_policy_rule_messages++; |
| } |
| |
| routing_policy_rule_purge(link->manager, link); |
| if (link->routing_policy_rule_messages == 0) { |
| link->routing_policy_rules_configured = true; |
| link_check_ready(link); |
| } else { |
| log_link_debug(link, "Setting routing policy rules"); |
| link_set_state(link, LINK_STATE_CONFIGURING); |
| } |
| |
| return 0; |
| } |
| |
| static int nexthop_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| int r; |
| |
| assert(link); |
| assert(link->nexthop_messages > 0); |
| assert(IN_SET(link->state, LINK_STATE_CONFIGURING, |
| LINK_STATE_FAILED, LINK_STATE_LINGER)); |
| |
| link->nexthop_messages--; |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
| return 1; |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r < 0 && r != -EEXIST) { |
| log_link_message_warning_errno(link, m, r, "Could not set nexthop"); |
| link_enter_failed(link); |
| return 1; |
| } |
| |
| if (link->nexthop_messages == 0) { |
| log_link_debug(link, "Nexthop set"); |
| link->static_nexthops_configured = true; |
| link_check_ready(link); |
| } |
| |
| return 1; |
| } |
| |
| int link_request_set_nexthop(Link *link) { |
| NextHop *nh; |
| int r; |
| |
| LIST_FOREACH(nexthops, nh, link->network->static_nexthops) { |
| r = nexthop_configure(nh, link, nexthop_handler); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not set nexthop: %m"); |
| if (r > 0) |
| link->nexthop_messages++; |
| } |
| |
| if (link->nexthop_messages == 0) { |
| link->static_nexthops_configured = true; |
| link_check_ready(link); |
| } else { |
| log_link_debug(link, "Setting nexthop"); |
| link_set_state(link, LINK_STATE_CONFIGURING); |
| } |
| |
| return 1; |
| } |
| |
| static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| int r; |
| |
| assert(link); |
| assert(link->route_messages > 0); |
| assert(IN_SET(link->state, LINK_STATE_CONFIGURING, |
| LINK_STATE_FAILED, LINK_STATE_LINGER)); |
| |
| link->route_messages--; |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
| return 1; |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r < 0 && r != -EEXIST) { |
| log_link_message_warning_errno(link, m, r, "Could not set route"); |
| link_enter_failed(link); |
| return 1; |
| } |
| |
| if (link->route_messages == 0) { |
| log_link_debug(link, "Routes set"); |
| link->static_routes_configured = true; |
| link_check_ready(link); |
| } |
| |
| return 1; |
| } |
| |
| int link_request_set_routes(Link *link) { |
| enum { |
| PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */ |
| PHASE_GATEWAY, /* Second phase: Routes with a gateway */ |
| _PHASE_MAX |
| } phase; |
| Route *rt; |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| assert(link->addresses_configured); |
| assert(link->address_messages == 0); |
| assert(link->state != _LINK_STATE_INVALID); |
| |
| link->static_routes_configured = false; |
| link->static_routes_ready = false; |
| |
| if (!link_has_carrier(link) && !link->network->configure_without_carrier) |
| /* During configuring addresses, the link lost its carrier. As networkd is dropping |
| * the addresses now, let's not configure the routes either. */ |
| return 0; |
| |
| r = link_request_set_routing_policy_rule(link); |
| if (r < 0) |
| return r; |
| |
| /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */ |
| for (phase = 0; phase < _PHASE_MAX; phase++) |
| LIST_FOREACH(routes, rt, link->network->static_routes) { |
| if (rt->gateway_from_dhcp) |
| continue; |
| |
| if ((in_addr_is_null(rt->family, &rt->gw) && ordered_set_isempty(rt->multipath_routes)) != (phase == PHASE_NON_GATEWAY)) |
| continue; |
| |
| r = route_configure(rt, link, route_handler); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not set routes: %m"); |
| if (r > 0) |
| link->route_messages++; |
| } |
| |
| if (link->route_messages == 0) { |
| link->static_routes_configured = true; |
| link_check_ready(link); |
| } else { |
| log_link_debug(link, "Setting routes"); |
| link_set_state(link, LINK_STATE_CONFIGURING); |
| } |
| |
| return 0; |
| } |
| |
| void link_check_ready(Link *link) { |
| Address *a; |
| Iterator i; |
| int r; |
| |
| assert(link); |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
| return; |
| |
| if (!link->network) |
| return; |
| |
| if (!link->addresses_configured) |
| return; |
| |
| if (!link->neighbors_configured) |
| return; |
| |
| SET_FOREACH(a, link->addresses, i) |
| if (!address_is_ready(a)) |
| return; |
| |
| if (!link->addresses_ready) { |
| link->addresses_ready = true; |
| r = link_request_set_routes(link); |
| if (r < 0) |
| link_enter_failed(link); |
| return; |
| } |
| |
| if (!link->static_routes_configured) |
| return; |
| |
| if (!link->static_routes_ready) { |
| link->static_routes_ready = true; |
| r = link_request_set_nexthop(link); |
| if (r < 0) |
| link_enter_failed(link); |
| return; |
| } |
| |
| if (!link->static_nexthops_configured) |
| return; |
| |
| if (!link->routing_policy_rules_configured) |
| return; |
| |
| if (!link->qdiscs_configured) |
| return; |
| |
| if (link_has_carrier(link) || !link->network->configure_without_carrier) { |
| |
| if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address) |
| return; |
| |
| if (link_ipv6ll_enabled(link) && |
| in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) |
| return; |
| |
| if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) && |
| !link->dhcp4_configured && |
| !link->dhcp6_configured && |
| !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address)) |
| /* When DHCP is enabled, at least one protocol must provide an address, or |
| * an IPv4ll fallback address must be configured. */ |
| return; |
| |
| if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured) |
| return; |
| } |
| |
| if (link->state != LINK_STATE_CONFIGURED) |
| link_enter_configured(link); |
| |
| return; |
| } |
| |
| static int link_request_set_neighbors(Link *link) { |
| Neighbor *neighbor; |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| assert(link->state != _LINK_STATE_INVALID); |
| |
| link->neighbors_configured = false; |
| |
| LIST_FOREACH(neighbors, neighbor, link->network->neighbors) { |
| r = neighbor_configure(neighbor, link, NULL); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not set neighbor: %m"); |
| } |
| |
| if (link->neighbor_messages == 0) { |
| link->neighbors_configured = true; |
| link_check_ready(link); |
| } else { |
| log_link_debug(link, "Setting neighbors"); |
| link_set_state(link, LINK_STATE_CONFIGURING); |
| } |
| |
| return 0; |
| } |
| |
| static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| int r; |
| |
| assert(rtnl); |
| assert(m); |
| assert(link); |
| assert(link->ifname); |
| assert(link->address_messages > 0); |
| assert(IN_SET(link->state, LINK_STATE_CONFIGURING, |
| LINK_STATE_FAILED, LINK_STATE_LINGER)); |
| |
| link->address_messages--; |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
| return 1; |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r < 0 && r != -EEXIST) { |
| log_link_message_warning_errno(link, m, r, "Could not set address"); |
| link_enter_failed(link); |
| return 1; |
| } else if (r >= 0) |
| (void) manager_rtnl_process_address(rtnl, m, link->manager); |
| |
| if (link->address_messages == 0) { |
| log_link_debug(link, "Addresses set"); |
| link->addresses_configured = true; |
| link_check_ready(link); |
| } |
| |
| return 1; |
| } |
| |
| static int link_set_bridge_fdb(Link *link) { |
| FdbEntry *fdb_entry; |
| int r; |
| |
| LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) { |
| r = fdb_entry_configure(link, fdb_entry); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m"); |
| } |
| |
| return 0; |
| } |
| |
| static int link_request_set_addresses(Link *link) { |
| AddressLabel *label; |
| Address *ad; |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| assert(link->state != _LINK_STATE_INVALID); |
| |
| /* Reset all *_configured flags we are configuring. */ |
| link->addresses_configured = false; |
| link->addresses_ready = false; |
| link->neighbors_configured = false; |
| link->static_routes_configured = false; |
| link->static_routes_ready = false; |
| link->static_nexthops_configured = false; |
| link->routing_policy_rules_configured = false; |
| |
| r = link_set_bridge_fdb(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_set_neighbors(link); |
| if (r < 0) |
| return r; |
| |
| LIST_FOREACH(addresses, ad, link->network->static_addresses) { |
| bool update; |
| |
| update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0; |
| |
| r = address_configure(ad, link, address_handler, update); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not set addresses: %m"); |
| if (r > 0) |
| link->address_messages++; |
| } |
| |
| LIST_FOREACH(labels, label, link->network->address_labels) { |
| r = address_label_configure(label, link, NULL, false); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not set address label: %m"); |
| |
| link->address_label_messages++; |
| } |
| |
| /* now that we can figure out a default address for the dhcp server, |
| start it */ |
| if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) { |
| r = dhcp4_server_configure(link); |
| if (r < 0) |
| return r; |
| log_link_debug(link, "Offering DHCPv4 leases"); |
| } |
| |
| if (link->address_messages == 0) { |
| link->addresses_configured = true; |
| link_check_ready(link); |
| } else { |
| log_link_debug(link, "Setting addresses"); |
| link_set_state(link, LINK_STATE_CONFIGURING); |
| } |
| |
| return 0; |
| } |
| |
| static int link_set_bridge_vlan(Link *link) { |
| int r; |
| |
| r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap); |
| if (r < 0) |
| log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m"); |
| |
| return r; |
| } |
| |
| static int link_set_proxy_arp(Link *link) { |
| int r; |
| |
| if (!link_proxy_arp_enabled(link)) |
| return 0; |
| |
| r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0); |
| if (r < 0) |
| log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m"); |
| |
| return 0; |
| } |
| |
| static int link_configure_continue(Link *link); |
| |
| static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| int r; |
| |
| assert(m); |
| assert(link); |
| assert(link->ifname); |
| |
| link->setting_mtu = false; |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
| return 1; |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r < 0) |
| log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring"); |
| else |
| log_link_debug(link, "Setting MTU done."); |
| |
| if (link->state == LINK_STATE_INITIALIZED) { |
| r = link_configure_continue(link); |
| if (r < 0) |
| link_enter_failed(link); |
| } |
| |
| return 1; |
| } |
| |
| int link_set_mtu(Link *link, uint32_t mtu) { |
| _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; |
| int r; |
| |
| assert(link); |
| assert(link->manager); |
| assert(link->manager->rtnl); |
| |
| if (mtu == 0 || link->setting_mtu) |
| return 0; |
| |
| if (link->mtu == mtu) |
| return 0; |
| |
| log_link_debug(link, "Setting MTU: %" PRIu32, mtu); |
| |
| r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); |
| |
| /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes |
| * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */ |
| if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) { |
| |
| log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as " |
| "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes"); |
| |
| mtu = IPV6_MIN_MTU; |
| } |
| |
| r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not append MTU: %m"); |
| |
| r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler, |
| link_netlink_destroy_callback, link); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); |
| |
| link_ref(link); |
| link->setting_mtu = true; |
| |
| return 0; |
| } |
| |
| static bool link_reduces_vlan_mtu(Link *link) { |
| /* See netif_reduces_vlan_mtu() in kernel. */ |
| return streq_ptr(link->kind, "macsec"); |
| } |
| |
| static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) { |
| uint32_t mtu = 0; |
| NetDev *dev; |
| Iterator i; |
| |
| HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i) |
| if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0) |
| /* See vlan_dev_change_mtu() in kernel. */ |
| mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu); |
| |
| else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu) |
| /* See macvlan_change_mtu() in kernel. */ |
| mtu = dev->mtu; |
| |
| return mtu; |
| } |
| |
| static int link_configure_mtu(Link *link) { |
| uint32_t mtu; |
| |
| assert(link); |
| assert(link->network); |
| |
| if (link->network->mtu > 0) |
| return link_set_mtu(link, link->network->mtu); |
| |
| mtu = link_get_requested_mtu_by_stacked_netdevs(link); |
| if (link->mtu >= mtu) |
| return 0; |
| |
| log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. " |
| "If it is not desired, then please explicitly specify MTUBytes= setting.", |
| link->mtu, mtu); |
| |
| return link_set_mtu(link, mtu); |
| } |
| |
| static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| int r; |
| |
| assert(m); |
| assert(link); |
| assert(link->ifname); |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
| return 1; |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r < 0) |
| log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring"); |
| |
| return 1; |
| } |
| |
| static int link_set_flags(Link *link) { |
| _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; |
| unsigned ifi_change = 0; |
| unsigned ifi_flags = 0; |
| int r; |
| |
| assert(link); |
| assert(link->manager); |
| assert(link->manager->rtnl); |
| |
| if (link->flags & IFF_LOOPBACK) |
| return 0; |
| |
| if (!link->network) |
| return 0; |
| |
| if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0) |
| return 0; |
| |
| r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); |
| |
| if (link->network->arp >= 0) { |
| ifi_change |= IFF_NOARP; |
| SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0); |
| } |
| |
| if (link->network->multicast >= 0) { |
| ifi_change |= IFF_MULTICAST; |
| SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast); |
| } |
| |
| if (link->network->allmulticast >= 0) { |
| ifi_change |= IFF_ALLMULTI; |
| SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast); |
| } |
| |
| r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not set link flags: %m"); |
| |
| r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler, |
| link_netlink_destroy_callback, link); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); |
| |
| link_ref(link); |
| |
| return 0; |
| } |
| |
| static int link_acquire_ipv6_conf(Link *link) { |
| int r; |
| |
| assert(link); |
| |
| if (link_ipv6_accept_ra_enabled(link)) { |
| assert(link->ndisc); |
| |
| log_link_debug(link, "Discovering IPv6 routers"); |
| |
| r = sd_ndisc_start(link->ndisc); |
| if (r < 0 && r != -EBUSY) |
| return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m"); |
| } |
| |
| if (link_radv_enabled(link)) { |
| assert(link->radv); |
| assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0); |
| |
| log_link_debug(link, "Starting IPv6 Router Advertisements"); |
| |
| r = radv_emit_dns(link); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m"); |
| |
| r = sd_radv_start(link->radv); |
| if (r < 0 && r != -EBUSY) |
| return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m"); |
| } |
| |
| (void) dhcp6_request_prefix_delegation(link); |
| |
| return 0; |
| } |
| |
| static int link_acquire_ipv4_conf(Link *link) { |
| int r; |
| |
| assert(link); |
| assert(link->manager); |
| assert(link->manager->event); |
| |
| if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) { |
| assert(link->ipv4ll); |
| |
| log_link_debug(link, "Acquiring IPv4 link-local address"); |
| |
| r = sd_ipv4ll_start(link->ipv4ll); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m"); |
| } |
| |
| if (link_dhcp4_enabled(link)) { |
| assert(link->dhcp_client); |
| |
| log_link_debug(link, "Acquiring DHCPv4 lease"); |
| |
| r = sd_dhcp_client_start(link->dhcp_client); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m"); |
| } |
| |
| return 0; |
| } |
| |
| static int link_acquire_conf(Link *link) { |
| int r; |
| |
| assert(link); |
| |
| r = link_acquire_ipv4_conf(link); |
| if (r < 0) |
| return r; |
| |
| if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) { |
| r = link_acquire_ipv6_conf(link); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link_lldp_emit_enabled(link)) { |
| r = link_lldp_emit_start(link); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m"); |
| } |
| |
| return 0; |
| } |
| |
| bool link_has_carrier(Link *link) { |
| /* see Documentation/networking/operstates.txt in the kernel sources */ |
| |
| if (link->kernel_operstate == IF_OPER_UP) |
| return true; |
| |
| if (link->kernel_operstate == IF_OPER_UNKNOWN) |
| /* operstate may not be implemented, so fall back to flags */ |
| if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) && |
| !FLAGS_SET(link->flags, IFF_DORMANT)) |
| return true; |
| |
| return false; |
| } |
| |
| static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| int r; |
| |
| assert(link); |
| |
| link->setting_genmode = false; |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
| return 1; |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r < 0) |
| log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring"); |
| else |
| log_link_debug(link, "Setting address genmode done."); |
| |
| if (link->state == LINK_STATE_INITIALIZED) { |
| r = link_configure_continue(link); |
| if (r < 0) |
| link_enter_failed(link); |
| } |
| |
| return 1; |
| } |
| |
| static int link_configure_addrgen_mode(Link *link) { |
| _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; |
| uint8_t ipv6ll_mode; |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| assert(link->manager); |
| assert(link->manager->rtnl); |
| |
| if (!socket_ipv6_is_supported() || link->setting_genmode) |
| return 0; |
| |
| log_link_debug(link, "Setting address genmode for link"); |
| |
| r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); |
| |
| r = sd_netlink_message_open_container(req, IFLA_AF_SPEC); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m"); |
| |
| r = sd_netlink_message_open_container(req, AF_INET6); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m"); |
| |
| if (!link_ipv6ll_enabled(link)) |
| ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE; |
| else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0) |
| /* The file may not exist. And event if it exists, when stable_secret is unset, |
| * reading the file fails with EIO. */ |
| ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64; |
| else |
| ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY; |
| |
| r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m"); |
| |
| r = sd_netlink_message_close_container(req); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m"); |
| |
| r = sd_netlink_message_close_container(req); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m"); |
| |
| r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler, |
| link_netlink_destroy_callback, link); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); |
| |
| link_ref(link); |
| link->setting_genmode = true; |
| |
| return 0; |
| } |
| |
| static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| int r; |
| |
| assert(link); |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
| return 1; |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r < 0) |
| /* we warn but don't fail the link, as it may be brought up later */ |
| log_link_message_warning_errno(link, m, r, "Could not bring up interface"); |
| |
| return 1; |
| } |
| |
| static int link_up(Link *link) { |
| _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| assert(link->manager); |
| assert(link->manager->rtnl); |
| |
| log_link_debug(link, "Bringing link up"); |
| |
| r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); |
| |
| /* set it free if not enslaved with networkd */ |
| if (!link->network->bridge && !link->network->bond && !link->network->vrf) { |
| r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m"); |
| } |
| |
| r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not set link flags: %m"); |
| |
| if (link->network->mac) { |
| r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not set MAC address: %m"); |
| } |
| |
| r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler, |
| link_netlink_destroy_callback, link); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); |
| |
| link_ref(link); |
| |
| return 0; |
| } |
| |
| static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| int r; |
| |
| assert(link); |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
| return 1; |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r < 0) |
| log_link_message_warning_errno(link, m, r, "Could not bring down interface"); |
| |
| return 1; |
| } |
| |
| int link_down(Link *link, link_netlink_message_handler_t callback) { |
| _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; |
| int r; |
| |
| assert(link); |
| assert(link->manager); |
| assert(link->manager->rtnl); |
| |
| log_link_debug(link, "Bringing link down"); |
| |
| r = sd_rtnl_message_new_link(link->manager->rtnl, &req, |
| RTM_SETLINK, link->ifindex); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); |
| |
| r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not set link flags: %m"); |
| |
| r = netlink_call_async(link->manager->rtnl, NULL, req, |
| callback ?: link_down_handler, |
| link_netlink_destroy_callback, link); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); |
| |
| link_ref(link); |
| |
| return 0; |
| } |
| |
| static int link_handle_bound_to_list(Link *link) { |
| Link *l; |
| Iterator i; |
| int r; |
| bool required_up = false; |
| bool link_is_up = false; |
| |
| assert(link); |
| |
| if (hashmap_isempty(link->bound_to_links)) |
| return 0; |
| |
| if (link->flags & IFF_UP) |
| link_is_up = true; |
| |
| HASHMAP_FOREACH (l, link->bound_to_links, i) |
| if (link_has_carrier(l)) { |
| required_up = true; |
| break; |
| } |
| |
| if (!required_up && link_is_up) { |
| r = link_down(link, NULL); |
| if (r < 0) |
| return r; |
| } else if (required_up && !link_is_up) { |
| r = link_up(link); |
| if (r < 0) |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| static int link_handle_bound_by_list(Link *link) { |
| Iterator i; |
| Link *l; |
| int r; |
| |
| assert(link); |
| |
| if (hashmap_isempty(link->bound_by_links)) |
| return 0; |
| |
| HASHMAP_FOREACH (l, link->bound_by_links, i) { |
| r = link_handle_bound_to_list(l); |
| if (r < 0) |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) { |
| int r; |
| |
| assert(link); |
| assert(carrier); |
| |
| if (link == carrier) |
| return 0; |
| |
| if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex))) |
| return 0; |
| |
| r = hashmap_ensure_allocated(h, NULL); |
| if (r < 0) |
| return r; |
| |
| r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier); |
| if (r < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| static int link_new_bound_by_list(Link *link) { |
| Manager *m; |
| Link *carrier; |
| Iterator i; |
| int r; |
| bool list_updated = false; |
| |
| assert(link); |
| assert(link->manager); |
| |
| m = link->manager; |
| |
| HASHMAP_FOREACH(carrier, m->links, i) { |
| if (!carrier->network) |
| continue; |
| |
| if (strv_isempty(carrier->network->bind_carrier)) |
| continue; |
| |
| if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) { |
| r = link_put_carrier(link, carrier, &link->bound_by_links); |
| if (r < 0) |
| return r; |
| |
| list_updated = true; |
| } |
| } |
| |
| if (list_updated) |
| link_dirty(link); |
| |
| HASHMAP_FOREACH(carrier, link->bound_by_links, i) { |
| r = link_put_carrier(carrier, link, &carrier->bound_to_links); |
| if (r < 0) |
| return r; |
| |
| link_dirty(carrier); |
| } |
| |
| return 0; |
| } |
| |
| static int link_new_bound_to_list(Link *link) { |
| Manager *m; |
| Link *carrier; |
| Iterator i; |
| int r; |
| bool list_updated = false; |
| |
| assert(link); |
| assert(link->manager); |
| |
| if (!link->network) |
| return 0; |
| |
| if (strv_isempty(link->network->bind_carrier)) |
| return 0; |
| |
| m = link->manager; |
| |
| HASHMAP_FOREACH (carrier, m->links, i) { |
| if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) { |
| r = link_put_carrier(link, carrier, &link->bound_to_links); |
| if (r < 0) |
| return r; |
| |
| list_updated = true; |
| } |
| } |
| |
| if (list_updated) |
| link_dirty(link); |
| |
| HASHMAP_FOREACH (carrier, link->bound_to_links, i) { |
| r = link_put_carrier(carrier, link, &carrier->bound_by_links); |
| if (r < 0) |
| return r; |
| |
| link_dirty(carrier); |
| } |
| |
| return 0; |
| } |
| |
| static int link_new_carrier_maps(Link *link) { |
| int r; |
| |
| r = link_new_bound_by_list(link); |
| if (r < 0) |
| return r; |
| |
| r = link_handle_bound_by_list(link); |
| if (r < 0) |
| return r; |
| |
| r = link_new_bound_to_list(link); |
| if (r < 0) |
| return r; |
| |
| r = link_handle_bound_to_list(link); |
| if (r < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| static void link_free_bound_to_list(Link *link) { |
| Link *bound_to; |
| Iterator i; |
| |
| HASHMAP_FOREACH (bound_to, link->bound_to_links, i) { |
| hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex)); |
| |
| if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex))) |
| link_dirty(bound_to); |
| } |
| |
| return; |
| } |
| |
| static void link_free_bound_by_list(Link *link) { |
| Link *bound_by; |
| Iterator i; |
| |
| HASHMAP_FOREACH (bound_by, link->bound_by_links, i) { |
| hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex)); |
| |
| if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) { |
| link_dirty(bound_by); |
| link_handle_bound_to_list(bound_by); |
| } |
| } |
| |
| return; |
| } |
| |
| static void link_free_carrier_maps(Link *link) { |
| bool list_updated = false; |
| |
| assert(link); |
| |
| if (!hashmap_isempty(link->bound_to_links)) { |
| link_free_bound_to_list(link); |
| list_updated = true; |
| } |
| |
| if (!hashmap_isempty(link->bound_by_links)) { |
| link_free_bound_by_list(link); |
| list_updated = true; |
| } |
| |
| if (list_updated) |
| link_dirty(link); |
| |
| return; |
| } |
| |
| static int link_append_to_master(Link *link, NetDev *netdev) { |
| Link *master; |
| int r; |
| |
| assert(link); |
| assert(netdev); |
| |
| r = link_get(link->manager, netdev->ifindex, &master); |
| if (r < 0) |
| return r; |
| |
| r = set_ensure_allocated(&master->slaves, NULL); |
| if (r < 0) |
| return r; |
| |
| r = set_put(master->slaves, link); |
| if (r <= 0) |
| return r; |
| |
| link_ref(link); |
| return 0; |
| } |
| |
| static void link_drop_from_master(Link *link, NetDev *netdev) { |
| Link *master; |
| |
| assert(link); |
| |
| if (!link->manager || !netdev) |
| return; |
| |
| if (link_get(link->manager, netdev->ifindex, &master) < 0) |
| return; |
| |
| link_unref(set_remove(master->slaves, link)); |
| } |
| |
| static void link_detach_from_manager(Link *link) { |
| if (!link || !link->manager) |
| return; |
| |
| link_unref(set_remove(link->manager->links_requesting_uuid, link)); |
| link_clean(link); |
| |
| /* The following must be called at last. */ |
| assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link); |
| link_unref(link); |
| } |
| |
| void link_drop(Link *link) { |
| if (!link || link->state == LINK_STATE_LINGER) |
| return; |
| |
| link_set_state(link, LINK_STATE_LINGER); |
| |
| link_free_carrier_maps(link); |
| |
| if (link->network) { |
| link_drop_from_master(link, link->network->bridge); |
| link_drop_from_master(link, link->network->bond); |
| } |
| |
| log_link_debug(link, "Link removed"); |
| |
| (void) unlink(link->state_file); |
| link_detach_from_manager(link); |
| } |
| |
| static int link_joined(Link *link) { |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| |
| if (!hashmap_isempty(link->bound_to_links)) { |
| r = link_handle_bound_to_list(link); |
| if (r < 0) |
| return r; |
| } else if (!(link->flags & IFF_UP)) { |
| r = link_up(link); |
| if (r < 0) { |
| link_enter_failed(link); |
| return r; |
| } |
| } |
| |
| if (link->network->bridge) { |
| r = link_set_bridge(link); |
| if (r < 0) |
| log_link_error_errno(link, r, "Could not set bridge message: %m"); |
| |
| r = link_append_to_master(link, link->network->bridge); |
| if (r < 0) |
| log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m"); |
| } |
| |
| if (link->network->bond) { |
| r = link_set_bond(link); |
| if (r < 0) |
| log_link_error_errno(link, r, "Could not set bond message: %m"); |
| |
| r = link_append_to_master(link, link->network->bond); |
| if (r < 0) |
| log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m"); |
| } |
| |
| if (link->network->use_br_vlan && |
| (link->network->bridge || streq_ptr("bridge", link->kind))) { |
| r = link_set_bridge_vlan(link); |
| if (r < 0) |
| log_link_error_errno(link, r, "Could not set bridge vlan: %m"); |
| } |
| |
| /* Skip setting up addresses until it gets carrier, |
| or it would try to set addresses twice, |
| which is bad for non-idempotent steps. */ |
| if (!link_has_carrier(link) && !link->network->configure_without_carrier) |
| return 0; |
| |
| link_set_state(link, LINK_STATE_CONFIGURING); |
| return link_request_set_addresses(link); |
| } |
| |
| static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| assert(link->enslaving > 0); |
| |
| link->enslaving--; |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
| return 1; |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r < 0 && r != -EEXIST) { |
| log_link_message_warning_errno(link, m, r, "Could not join netdev"); |
| link_enter_failed(link); |
| return 1; |
| } |
| |
| log_link_debug(link, "Joined netdev"); |
| |
| if (link->enslaving == 0) { |
| r = link_joined(link); |
| if (r < 0) |
| link_enter_failed(link); |
| } |
| |
| return 1; |
| } |
| |
| static int link_enter_join_netdev(Link *link) { |
| NetDev *netdev; |
| Iterator i; |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| assert(link->state == LINK_STATE_INITIALIZED); |
| |
| link_set_state(link, LINK_STATE_CONFIGURING); |
| |
| link_dirty(link); |
| link->enslaving = 0; |
| |
| if (link->network->bond) { |
| if (link->network->bond->state == NETDEV_STATE_READY && |
| link->network->bond->ifindex == link->master_ifindex) |
| return link_joined(link); |
| |
| log_struct(LOG_DEBUG, |
| LOG_LINK_INTERFACE(link), |
| LOG_NETDEV_INTERFACE(link->network->bond), |
| LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname)); |
| |
| link->enslaving++; |
| |
| r = netdev_join(link->network->bond, link, netdev_join_handler); |
| if (r < 0) { |
| log_struct_errno(LOG_WARNING, r, |
| LOG_LINK_INTERFACE(link), |
| LOG_NETDEV_INTERFACE(link->network->bond), |
| LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname)); |
| link_enter_failed(link); |
| return r; |
| } |
| } |
| |
| if (link->network->bridge) { |
| log_struct(LOG_DEBUG, |
| LOG_LINK_INTERFACE(link), |
| LOG_NETDEV_INTERFACE(link->network->bridge), |
| LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname)); |
| |
| link->enslaving++; |
| |
| r = netdev_join(link->network->bridge, link, netdev_join_handler); |
| if (r < 0) { |
| log_struct_errno(LOG_WARNING, r, |
| LOG_LINK_INTERFACE(link), |
| LOG_NETDEV_INTERFACE(link->network->bridge), |
| LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname)); |
| link_enter_failed(link); |
| return r; |
| } |
| } |
| |
| if (link->network->vrf) { |
| log_struct(LOG_DEBUG, |
| LOG_LINK_INTERFACE(link), |
| LOG_NETDEV_INTERFACE(link->network->vrf), |
| LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname)); |
| |
| link->enslaving++; |
| |
| r = netdev_join(link->network->vrf, link, netdev_join_handler); |
| if (r < 0) { |
| log_struct_errno(LOG_WARNING, r, |
| LOG_LINK_INTERFACE(link), |
| LOG_NETDEV_INTERFACE(link->network->vrf), |
| LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname)); |
| link_enter_failed(link); |
| return r; |
| } |
| } |
| |
| HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) { |
| |
| if (netdev->ifindex > 0) |
| /* Assume already enslaved. */ |
| continue; |
| |
| if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED) |
| continue; |
| |
| log_struct(LOG_DEBUG, |
| LOG_LINK_INTERFACE(link), |
| LOG_NETDEV_INTERFACE(netdev), |
| LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname)); |
| |
| link->enslaving++; |
| |
| r = netdev_join(netdev, link, netdev_join_handler); |
| if (r < 0) { |
| log_struct_errno(LOG_WARNING, r, |
| LOG_LINK_INTERFACE(link), |
| LOG_NETDEV_INTERFACE(netdev), |
| LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname)); |
| link_enter_failed(link); |
| return r; |
| } |
| } |
| |
| if (link->enslaving == 0) |
| return link_joined(link); |
| |
| return 0; |
| } |
| |
| static int link_set_ipv4_forward(Link *link) { |
| int r; |
| |
| if (!link_ipv4_forward_enabled(link)) |
| return 0; |
| |
| /* We propagate the forwarding flag from one interface to the |
| * global setting one way. This means: as long as at least one |
| * interface was configured at any time that had IP forwarding |
| * enabled the setting will stay on for good. We do this |
| * primarily to keep IPv4 and IPv6 packet forwarding behaviour |
| * somewhat in sync (see below). */ |
| |
| r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1"); |
| if (r < 0) |
| log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m"); |
| |
| return 0; |
| } |
| |
| static int link_set_ipv6_forward(Link *link) { |
| int r; |
| |
| if (!link_ipv6_forward_enabled(link)) |
| return 0; |
| |
| /* On Linux, the IPv6 stack does not know a per-interface |
| * packet forwarding setting: either packet forwarding is on |
| * for all, or off for all. We hence don't bother with a |
| * per-interface setting, but simply propagate the interface |
| * flag, if it is set, to the global flag, one-way. Note that |
| * while IPv4 would allow a per-interface flag, we expose the |
| * same behaviour there and also propagate the setting from |
| * one to all, to keep things simple (see above). */ |
| |
| r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1"); |
| if (r < 0) |
| log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m"); |
| |
| return 0; |
| } |
| |
| static int link_set_ipv6_privacy_extensions(Link *link) { |
| IPv6PrivacyExtensions s; |
| int r; |
| |
| s = link_ipv6_privacy_extensions(link); |
| if (s < 0) |
| return 0; |
| |
| r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions); |
| if (r < 0) |
| log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m"); |
| |
| return 0; |
| } |
| |
| static int link_set_ipv6_accept_ra(Link *link) { |
| int r; |
| |
| /* Make this a NOP if IPv6 is not available */ |
| if (!socket_ipv6_is_supported()) |
| return 0; |
| |
| if (link->flags & IFF_LOOPBACK) |
| return 0; |
| |
| if (!link->network) |
| return 0; |
| |
| r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0"); |
| if (r < 0) |
| log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m"); |
| |
| return 0; |
| } |
| |
| static int link_set_ipv6_dad_transmits(Link *link) { |
| int r; |
| |
| /* Make this a NOP if IPv6 is not available */ |
| if (!socket_ipv6_is_supported()) |
| return 0; |
| |
| if (link->flags & IFF_LOOPBACK) |
| return 0; |
| |
| if (!link->network) |
| return 0; |
| |
| if (link->network->ipv6_dad_transmits < 0) |
| return 0; |
| |
| r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits); |
| if (r < 0) |
| log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m"); |
| |
| return 0; |
| } |
| |
| static int link_set_ipv6_hop_limit(Link *link) { |
| int r; |
| |
| /* Make this a NOP if IPv6 is not available */ |
| if (!socket_ipv6_is_supported()) |
| return 0; |
| |
| if (link->flags & IFF_LOOPBACK) |
| return 0; |
| |
| if (!link->network) |
| return 0; |
| |
| if (link->network->ipv6_hop_limit < 0) |
| return 0; |
| |
| r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit); |
| if (r < 0) |
| log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m"); |
| |
| return 0; |
| } |
| |
| static int link_set_ipv6_mtu(Link *link) { |
| int r; |
| |
| /* Make this a NOP if IPv6 is not available */ |
| if (!socket_ipv6_is_supported()) |
| return 0; |
| |
| if (link->flags & IFF_LOOPBACK) |
| return 0; |
| |
| if (link->network->ipv6_mtu == 0) |
| return 0; |
| |
| /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes |
| * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */ |
| if (link->network->ipv6_mtu < IPV6_MIN_MTU) { |
| log_link_notice(link, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU)" byte minimum required"); |
| link->network->ipv6_mtu = IPV6_MIN_MTU; |
| } |
| |
| r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu); |
| if (r < 0) { |
| if (link->mtu < link->network->ipv6_mtu) |
| log_link_warning(link, "Cannot set IPv6 MTU %"PRIu32" higher than device MTU %"PRIu32, |
| link->network->ipv6_mtu, link->mtu); |
| else |
| log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m"); |
| } |
| |
| link->ipv6_mtu_set = true; |
| |
| return 0; |
| } |
| |
| static bool link_is_static_address_configured(Link *link, Address *address) { |
| Address *net_address; |
| |
| assert(link); |
| assert(address); |
| |
| if (!link->network) |
| return false; |
| |
| LIST_FOREACH(addresses, net_address, link->network->static_addresses) |
| if (address_equal(net_address, address)) |
| return true; |
| |
| return false; |
| } |
| |
| static bool link_is_neighbor_configured(Link *link, Neighbor *neighbor) { |
| Neighbor *net_neighbor; |
| |
| assert(link); |
| assert(neighbor); |
| |
| if (!link->network) |
| return false; |
| |
| LIST_FOREACH(neighbors, net_neighbor, link->network->neighbors) |
| if (neighbor_equal(net_neighbor, neighbor)) |
| return true; |
| |
| return false; |
| } |
| |
| static bool link_is_static_route_configured(Link *link, Route *route) { |
| Route *net_route; |
| |
| assert(link); |
| assert(route); |
| |
| if (!link->network) |
| return false; |
| |
| LIST_FOREACH(routes, net_route, link->network->static_routes) |
| if (route_equal(net_route, route)) |
| return true; |
| |
| return false; |
| } |
| |
| static bool link_address_is_dynamic(Link *link, Address *address) { |
| Route *route; |
| Iterator i; |
| |
| assert(link); |
| assert(address); |
| |
| if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME) |
| return true; |
| |
| /* Even when the address is leased from a DHCP server, networkd assign the address |
| * without lifetime when KeepConfiguration=dhcp. So, let's check that we have |
| * corresponding routes with RTPROT_DHCP. */ |
| SET_FOREACH(route, link->routes_foreign, i) { |
| if (route->protocol != RTPROT_DHCP) |
| continue; |
| |
| if (address->family != route->family) |
| continue; |
| |
| if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc)) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static int link_enumerate_ipv6_tentative_addresses(Link *link) { |
| _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL; |
| sd_netlink_message *addr; |
| int r; |
| |
| assert(link); |
| assert(link->manager); |
| assert(link->manager->rtnl); |
| |
| r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_call(link->manager->rtnl, req, 0, &reply); |
| if (r < 0) |
| return r; |
| |
| for (addr = reply; addr; addr = sd_netlink_message_next(addr)) { |
| unsigned char flags; |
| int ifindex; |
| |
| r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m"); |
| continue; |
| } else if (link->ifindex != ifindex) |
| continue; |
| |
| r = sd_rtnl_message_addr_get_flags(addr, &flags); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m"); |
| continue; |
| } else if (!(flags & IFA_F_TENTATIVE)) |
| continue; |
| |
| log_link_debug(link, "Found tentative ipv6 link-local address"); |
| (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager); |
| } |
| |
| return 0; |
| } |
| |
| static int link_drop_foreign_config(Link *link) { |
| Address *address; |
| Neighbor *neighbor; |
| Route *route; |
| Iterator i; |
| int r; |
| |
| /* The kernel doesn't notify us about tentative addresses; |
| * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */ |
| if (!link_ipv6ll_enabled(link)) { |
| r = link_enumerate_ipv6_tentative_addresses(link); |
| if (r < 0) |
| return r; |
| } |
| |
| SET_FOREACH(address, link->addresses_foreign, i) { |
| /* we consider IPv6LL addresses to be managed by the kernel */ |
| if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link)) |
| continue; |
| |
| if (link_address_is_dynamic(link, address)) { |
| if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP)) |
| continue; |
| } else if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC)) |
| continue; |
| |
| if (link_is_static_address_configured(link, address)) { |
| r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Failed to add address: %m"); |
| } else { |
| r = address_remove(address, link, NULL); |
| if (r < 0) |
| return r; |
| } |
| } |
| |
| SET_FOREACH(neighbor, link->neighbors_foreign, i) { |
| if (link_is_neighbor_configured(link, neighbor)) { |
| r = neighbor_add(link, neighbor->family, &neighbor->in_addr, &neighbor->lladdr, neighbor->lladdr_size, NULL); |
| if (r < 0) |
| return r; |
| } else { |
| r = neighbor_remove(neighbor, link, NULL); |
| if (r < 0) |
| return r; |
| } |
| } |
| |
| SET_FOREACH(route, link->routes_foreign, i) { |
| /* do not touch routes managed by the kernel */ |
| if (route->protocol == RTPROT_KERNEL) |
| continue; |
| |
| /* do not touch multicast route added by kernel */ |
| /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that. |
| * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */ |
| if (route->protocol == RTPROT_BOOT && |
| route->family == AF_INET6 && |
| route->dst_prefixlen == 8 && |
| in_addr_equal(AF_INET6, &route->dst, &(union in_addr_union) { .in6 = {{{ 0xff,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0 }}} })) |
| continue; |
| |
| if (route->protocol == RTPROT_STATIC && link->network && |
| FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC)) |
| continue; |
| |
| if (route->protocol == RTPROT_DHCP && link->network && |
| FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP)) |
| continue; |
| |
| if (link_is_static_route_configured(link, route)) { |
| r = route_add(link, route, NULL); |
| if (r < 0) |
| return r; |
| } else { |
| r = route_remove(route, link, NULL); |
| if (r < 0) |
| return r; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int link_drop_config(Link *link) { |
| Address *address, *pool_address; |
| Neighbor *neighbor; |
| Route *route; |
| Iterator i; |
| int r; |
| |
| SET_FOREACH(address, link->addresses, i) { |
| /* we consider IPv6LL addresses to be managed by the kernel */ |
| if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link)) |
| continue; |
| |
| r = address_remove(address, link, NULL); |
| if (r < 0) |
| return r; |
| |
| /* If this address came from an address pool, clean up the pool */ |
| LIST_FOREACH(addresses, pool_address, link->pool_addresses) { |
| if (address_equal(address, pool_address)) { |
| LIST_REMOVE(addresses, link->pool_addresses, pool_address); |
| address_free(pool_address); |
| break; |
| } |
| } |
| } |
| |
| SET_FOREACH(neighbor, link->neighbors, i) { |
| r = neighbor_remove(neighbor, link, NULL); |
| if (r < 0) |
| return r; |
| } |
| |
| SET_FOREACH(route, link->routes, i) { |
| /* do not touch routes managed by the kernel */ |
| if (route->protocol == RTPROT_KERNEL) |
| continue; |
| |
| r = route_remove(route, link, NULL); |
| if (r < 0) |
| return r; |
| } |
| |
| ndisc_flush(link); |
| |
| return 0; |
| } |
| |
| static int link_configure_ipv4_dad(Link *link) { |
| Address *address; |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| |
| LIST_FOREACH(addresses, address, link->network->static_addresses) |
| if (address->family == AF_INET && |
| FLAGS_SET(address->duplicate_address_detection, ADDRESS_FAMILY_IPV4)) { |
| r = configure_ipv4_duplicate_address_detection(link, address); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Failed to configure IPv4ACD: %m"); |
| } |
| |
| return 0; |
| } |
| |
| static int link_configure_qdiscs(Link *link) { |
| QDisc *qdisc; |
| Iterator i; |
| int r; |
| |
| link->qdiscs_configured = false; |
| link->qdisc_messages = 0; |
| |
| ORDERED_HASHMAP_FOREACH(qdisc, link->network->qdiscs_by_section, i) { |
| r = qdisc_configure(link, qdisc); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link->qdisc_messages == 0) |
| link->qdiscs_configured = true; |
| else |
| log_link_debug(link, "Configuring queuing discipline (qdisc)"); |
| |
| return 0; |
| } |
| |
| static int link_configure(Link *link) { |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| assert(link->state == LINK_STATE_INITIALIZED); |
| |
| r = link_configure_qdiscs(link); |
| if (r < 0) |
| return r; |
| |
| if (link->iftype == ARPHRD_CAN) |
| return link_configure_can(link); |
| |
| /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled |
| * for this interface, then enable IPv6 */ |
| (void) link_update_ipv6_sysctl(link); |
| |
| r = link_set_proxy_arp(link); |
| if (r < 0) |
| return r; |
| |
| r = ipv6_proxy_ndp_addresses_configure(link); |
| if (r < 0) |
| return r; |
| |
| r = link_set_ipv4_forward(link); |
| if (r < 0) |
| return r; |
| |
| r = link_set_ipv6_forward(link); |
| if (r < 0) |
| return r; |
| |
| r = link_set_ipv6_privacy_extensions(link); |
| if (r < 0) |
| return r; |
| |
| r = link_set_ipv6_accept_ra(link); |
| if (r < 0) |
| return r; |
| |
| r = link_set_ipv6_dad_transmits(link); |
| if (r < 0) |
| return r; |
| |
| r = link_set_ipv6_hop_limit(link); |
| if (r < 0) |
| return r; |
| |
| r = link_set_flags(link); |
| if (r < 0) |
| return r; |
| |
| if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) { |
| r = ipv4ll_configure(link); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link_dhcp4_enabled(link)) { |
| r = dhcp4_set_promote_secondaries(link); |
| if (r < 0) |
| return r; |
| |
| r = dhcp4_configure(link); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link_dhcp4_server_enabled(link)) { |
| r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex); |
| if (r < 0) |
| return r; |
| |
| r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link_dhcp6_enabled(link) || |
| link_ipv6_accept_ra_enabled(link)) { |
| r = dhcp6_configure(link); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link_ipv6_accept_ra_enabled(link)) { |
| r = ndisc_configure(link); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link_radv_enabled(link)) { |
| r = radv_configure(link); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link_lldp_rx_enabled(link)) { |
| r = link_lldp_rx_configure(link); |
| if (r < 0) |
| return r; |
| } |
| |
| r = link_configure_mtu(link); |
| if (r < 0) |
| return r; |
| |
| r = link_configure_addrgen_mode(link); |
| if (r < 0) |
| return r; |
| |
| r = link_configure_ipv4_dad(link); |
| if (r < 0) |
| return r; |
| |
| return link_configure_continue(link); |
| } |
| |
| /* The configuration continues in this separate function, instead of |
| * including this in the above link_configure() function, for two |
| * reasons: |
| * 1) some devices reset the link when the mtu is set, which caused |
| * an infinite loop here in networkd; see: |
| * https://github.com/systemd/systemd/issues/6593 |
| * https://github.com/systemd/systemd/issues/9831 |
| * 2) if ipv6ll is disabled, then bringing the interface up must be |
| * delayed until after we get confirmation from the kernel that |
| * the addr_gen_mode parameter has been set (via netlink), see: |
| * https://github.com/systemd/systemd/issues/13882 |
| */ |
| static int link_configure_continue(Link *link) { |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| assert(link->state == LINK_STATE_INITIALIZED); |
| |
| if (link->setting_mtu || link->setting_genmode) |
| return 0; |
| |
| /* Drop foreign config, but ignore loopback or critical devices. |
| * We do not want to remove loopback address or addresses used for root NFS. */ |
| if (!(link->flags & IFF_LOOPBACK) && |
| link->network->keep_configuration != KEEP_CONFIGURATION_YES) { |
| r = link_drop_foreign_config(link); |
| if (r < 0) |
| return r; |
| } |
| |
| /* The kernel resets ipv6 mtu after changing device mtu; |
| * we must set this here, after we've set device mtu */ |
| r = link_set_ipv6_mtu(link); |
| if (r < 0) |
| return r; |
| |
| if (link_has_carrier(link) || link->network->configure_without_carrier) { |
| r = link_acquire_conf(link); |
| if (r < 0) |
| return r; |
| } |
| |
| return link_enter_join_netdev(link); |
| } |
| |
| static int duid_set_uuid(DUID *duid, sd_id128_t uuid) { |
| assert(duid); |
| |
| if (duid->raw_data_len > 0) |
| return 0; |
| |
| if (duid->type != DUID_TYPE_UUID) |
| return -EINVAL; |
| |
| memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t)); |
| duid->raw_data_len = sizeof(sd_id128_t); |
| |
| return 1; |
| } |
| |
| int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) { |
| Manager *manager = userdata; |
| const sd_bus_error *e; |
| const void *a; |
| size_t sz; |
| DUID *duid; |
| Link *link; |
| int r; |
| |
| assert(m); |
| assert(manager); |
| |
| e = sd_bus_message_get_error(m); |
| if (e) { |
| log_error_errno(sd_bus_error_get_errno(e), |
| "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s", |
| e->message); |
| goto configure; |
| } |
| |
| r = sd_bus_message_read_array(m, 'y', &a, &sz); |
| if (r < 0) |
| goto configure; |
| |
| if (sz != sizeof(sd_id128_t)) { |
| log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID."); |
| goto configure; |
| } |
| |
| memcpy(&manager->product_uuid, a, sz); |
| while ((duid = set_steal_first(manager->duids_requesting_uuid))) |
| (void) duid_set_uuid(duid, manager->product_uuid); |
| |
| manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid); |
| |
| configure: |
| while ((link = set_steal_first(manager->links_requesting_uuid))) { |
| link_unref(link); |
| |
| r = link_configure(link); |
| if (r < 0) |
| link_enter_failed(link); |
| } |
| |
| manager->links_requesting_uuid = set_free(manager->links_requesting_uuid); |
| |
| /* To avoid calling GetProductUUID() bus method so frequently, set the flag below |
| * even if the method fails. */ |
| manager->has_product_uuid = true; |
| |
| return 1; |
| } |
| |
| static bool link_requires_uuid(Link *link) { |
| const DUID *duid; |
| |
| assert(link); |
| assert(link->manager); |
| assert(link->network); |
| |
| duid = link_get_duid(link); |
| if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0) |
| return false; |
| |
| if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY)) |
| return true; |
| |
| if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link)) |
| return true; |
| |
| return false; |
| } |
| |
| static int link_configure_duid(Link *link) { |
| Manager *m; |
| DUID *duid; |
| int r; |
| |
| assert(link); |
| assert(link->manager); |
| assert(link->network); |
| |
| m = link->manager; |
| duid = link_get_duid(link); |
| |
| if (!link_requires_uuid(link)) |
| return 1; |
| |
| if (m->has_product_uuid) { |
| (void) duid_set_uuid(duid, m->product_uuid); |
| return 1; |
| } |
| |
| if (!m->links_requesting_uuid) { |
| r = manager_request_product_uuid(m, link); |
| if (r < 0) { |
| if (r == -ENOMEM) |
| return r; |
| |
| log_link_warning_errno(link, r, |
| "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m"); |
| return 1; |
| } |
| } else { |
| r = set_put(m->links_requesting_uuid, link); |
| if (r < 0) |
| return log_oom(); |
| |
| r = set_put(m->duids_requesting_uuid, duid); |
| if (r < 0) |
| return log_oom(); |
| |
| link_ref(link); |
| } |
| |
| return 0; |
| } |
| |
| static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) { |
| Network *network; |
| int r; |
| |
| if (m) { |
| _cleanup_strv_free_ char **s = NULL; |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s); |
| if (r < 0 && r != -ENODATA) |
| return r; |
| |
| strv_free_and_replace(link->alternative_names, s); |
| } |
| |
| r = network_get(link->manager, link->sd_device, link->ifname, link->alternative_names, |
| &link->mac, &link->permanent_mac, link->wlan_iftype, link->ssid, &link->bssid, &network); |
| if (r == -ENOENT) { |
| link_enter_unmanaged(link); |
| return 0; |
| } else if (r == 0 && network->unmanaged) { |
| link_enter_unmanaged(link); |
| return 0; |
| } else if (r < 0) |
| return r; |
| |
| if (link->network == network && !force) |
| return 0; |
| |
| log_link_info(link, "Re-configuring with %s", network->filename); |
| |
| /* Dropping old .network file */ |
| r = link_stop_clients(link, false); |
| if (r < 0) |
| return r; |
| |
| if (link_dhcp4_server_enabled(link)) |
| (void) sd_dhcp_server_stop(link->dhcp_server); |
| |
| r = link_drop_config(link); |
| if (r < 0) |
| return r; |
| |
| if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) { |
| log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state)); |
| r = link_drop_foreign_config(link); |
| if (r < 0) |
| return r; |
| } |
| |
| link_free_carrier_maps(link); |
| link_free_engines(link); |
| link->network = network_unref(link->network); |
| |
| /* Then, apply new .network file */ |
| r = network_apply(network, link); |
| if (r < 0) |
| return r; |
| |
| r = link_new_carrier_maps(link); |
| if (r < 0) |
| return r; |
| |
| link_set_state(link, LINK_STATE_INITIALIZED); |
| link_dirty(link); |
| |
| /* link_configure_duid() returns 0 if it requests product UUID. In that case, |
| * link_configure() is called later asynchronously. */ |
| r = link_configure_duid(link); |
| if (r <= 0) |
| return r; |
| |
| r = link_configure(link); |
| if (r < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| int r; |
| |
| r = link_reconfigure_internal(link, m, false); |
| if (r < 0) |
| link_enter_failed(link); |
| |
| return 1; |
| } |
| |
| static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| int r; |
| |
| r = link_reconfigure_internal(link, m, true); |
| if (r < 0) |
| link_enter_failed(link); |
| |
| return 1; |
| } |
| |
| int link_reconfigure(Link *link, bool force) { |
| _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; |
| int r; |
| |
| if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER)) |
| return 0; |
| |
| r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, |
| link->ifindex); |
| if (r < 0) |
| return r; |
| |
| r = netlink_call_async(link->manager->rtnl, NULL, req, |
| force ? link_force_reconfigure_handler : link_reconfigure_handler, |
| link_netlink_destroy_callback, link); |
| if (r < 0) |
| return r; |
| |
| link_ref(link); |
| |
| return 0; |
| } |
| |
| static int link_initialized_and_synced(Link *link) { |
| Network *network; |
| int r; |
| |
| assert(link); |
| assert(link->ifname); |
| assert(link->manager); |
| |
| /* We may get called either from the asynchronous netlink callback, |
| * or directly for link_add() if running in a container. See link_add(). */ |
| if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) |
| return 0; |
| |
| log_link_debug(link, "Link state is up-to-date"); |
| link_set_state(link, LINK_STATE_INITIALIZED); |
| |
| r = link_new_bound_by_list(link); |
| if (r < 0) |
| return r; |
| |
| r = link_handle_bound_by_list(link); |
| if (r < 0) |
| return r; |
| |
| if (!link->network) { |
| r = wifi_get_info(link); |
| if (r < 0) |
| return r; |
| |
| r = network_get(link->manager, link->sd_device, link->ifname, link->alternative_names, |
| &link->mac, &link->permanent_mac, link->wlan_iftype, link->ssid, &link->bssid, &network); |
| if (r == -ENOENT) { |
| link_enter_unmanaged(link); |
| return 0; |
| } else if (r == 0 && network->unmanaged) { |
| link_enter_unmanaged(link); |
| return 0; |
| } else if (r < 0) |
| return r; |
| |
| if (link->flags & IFF_LOOPBACK) { |
| if (network->link_local != ADDRESS_FAMILY_NO) |
| log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link"); |
| |
| if (network->dhcp != ADDRESS_FAMILY_NO) |
| log_link_debug(link, "Ignoring DHCP clients for loopback link"); |
| |
| if (network->dhcp_server) |
| log_link_debug(link, "Ignoring DHCP server for loopback link"); |
| } |
| |
| r = network_apply(network, link); |
| if (r < 0) |
| return r; |
| } |
| |
| r = link_new_bound_to_list(link); |
| if (r < 0) |
| return r; |
| |
| /* link_configure_duid() returns 0 if it requests product UUID. In that case, |
| * link_configure() is called later asynchronously. */ |
| r = link_configure_duid(link); |
| if (r <= 0) |
| return r; |
| |
| r = link_configure(link); |
| if (r < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| _cleanup_strv_free_ char **s = NULL; |
| int r; |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m"); |
| link_enter_failed(link); |
| return 0; |
| } |
| |
| r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s); |
| if (r < 0 && r != -ENODATA) { |
| link_enter_failed(link); |
| return 0; |
| } |
| |
| strv_free_and_replace(link->alternative_names, s); |
| |
| r = link_initialized_and_synced(link); |
| if (r < 0) |
| link_enter_failed(link); |
| return 1; |
| } |
| |
| int link_initialized(Link *link, sd_device *device) { |
| _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; |
| int r; |
| |
| assert(link); |
| assert(link->manager); |
| assert(link->manager->rtnl); |
| assert(device); |
| |
| if (link->state != LINK_STATE_PENDING) |
| return 0; |
| |
| if (link->sd_device) |
| return 0; |
| |
| log_link_debug(link, "udev initialized link"); |
| link_set_state(link, LINK_STATE_INITIALIZED); |
| |
| link->sd_device = sd_device_ref(device); |
| |
| /* udev has initialized the link, but we don't know if we have yet |
| * processed the NEWLINK messages with the latest state. Do a GETLINK, |
| * when it returns we know that the pending NEWLINKs have already been |
| * processed and that we are up-to-date */ |
| |
| r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, |
| link->ifindex); |
| if (r < 0) |
| return r; |
| |
| r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler, |
| link_netlink_destroy_callback, link); |
| if (r < 0) |
| return r; |
| |
| link_ref(link); |
| |
| return 0; |
| } |
| |
| static int link_load(Link *link) { |
| _cleanup_free_ char *network_file = NULL, |
| *addresses = NULL, |
| *routes = NULL, |
| *dhcp4_address = NULL, |
| *ipv4ll_address = NULL; |
| union in_addr_union address; |
| const char *p; |
| int r; |
| |
| assert(link); |
| |
| r = parse_env_file(NULL, link->state_file, |
| "NETWORK_FILE", &network_file, |
| "ADDRESSES", &addresses, |
| "ROUTES", &routes, |
| "DHCP4_ADDRESS", &dhcp4_address, |
| "IPV4LL_ADDRESS", &ipv4ll_address); |
| if (r < 0 && r != -ENOENT) |
| return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file); |
| |
| if (network_file) { |
| Network *network; |
| char *suffix; |
| |
| /* drop suffix */ |
| suffix = strrchr(network_file, '.'); |
| if (!suffix) { |
| log_link_debug(link, "Failed to get network name from %s", network_file); |
| goto network_file_fail; |
| } |
| *suffix = '\0'; |
| |
| r = network_get_by_name(link->manager, basename(network_file), &network); |
| if (r < 0) { |
| log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file)); |
| goto network_file_fail; |
| } |
| |
| r = network_apply(network, link); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file)); |
| } |
| |
| network_file_fail: |
| |
| if (addresses) { |
| p = addresses; |
| |
| for (;;) { |
| _cleanup_free_ char *address_str = NULL; |
| char *prefixlen_str; |
| int family; |
| unsigned char prefixlen; |
| |
| r = extract_first_word(&p, &address_str, NULL, 0); |
| if (r < 0) { |
| log_link_debug_errno(link, r, "Failed to extract next address string: %m"); |
| continue; |
| } |
| if (r == 0) |
| break; |
| |
| prefixlen_str = strchr(address_str, '/'); |
| if (!prefixlen_str) { |
| log_link_debug(link, "Failed to parse address and prefix length %s", address_str); |
| continue; |
| } |
| |
| *prefixlen_str++ = '\0'; |
| |
| r = sscanf(prefixlen_str, "%hhu", &prefixlen); |
| if (r != 1) { |
| log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str); |
| continue; |
| } |
| |
| r = in_addr_from_string_auto(address_str, &family, &address); |
| if (r < 0) { |
| log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str); |
| continue; |
| } |
| |
| r = address_add(link, family, &address, prefixlen, NULL); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Failed to add address: %m"); |
| } |
| } |
| |
| if (routes) { |
| p = routes; |
| |
| for (;;) { |
| _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL; |
| _cleanup_(route_freep) Route *tmp = NULL; |
| _cleanup_free_ char *route_str = NULL; |
| char *prefixlen_str; |
| Route *route; |
| |
| r = extract_first_word(&p, &route_str, NULL, 0); |
| if (r < 0) { |
| log_link_debug_errno(link, r, "Failed to extract next route string: %m"); |
| continue; |
| } |
| if (r == 0) |
| break; |
| |
| prefixlen_str = strchr(route_str, '/'); |
| if (!prefixlen_str) { |
| log_link_debug(link, "Failed to parse route %s", route_str); |
| continue; |
| } |
| |
| *prefixlen_str++ = '\0'; |
| |
| r = route_new(&tmp); |
| if (r < 0) |
| return log_oom(); |
| |
| r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%"PRIu32"/"USEC_FMT, &tmp->dst_prefixlen, &tmp->tos, &tmp->priority, &tmp->table, &tmp->lifetime); |
| if (r != 5) { |
| log_link_debug(link, |
| "Failed to parse destination prefix length, tos, priority, table or expiration %s", |
| prefixlen_str); |
| continue; |
| } |
| |
| r = in_addr_from_string_auto(route_str, &tmp->family, &tmp->dst); |
| if (r < 0) { |
| log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str); |
| continue; |
| } |
| |
| r = route_add(link, tmp, &route); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Failed to add route: %m"); |
| |
| if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) { |
| r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), route->lifetime, |
| 0, route_expire_handler, route); |
| if (r < 0) |
| log_link_warning_errno(link, r, "Could not arm route expiration handler: %m"); |
| } |
| |
| sd_event_source_unref(route->expire); |
| route->expire = TAKE_PTR(expire); |
| } |
| } |
| |
| if (dhcp4_address) { |
| r = in_addr_from_string(AF_INET, dhcp4_address, &address); |
| if (r < 0) { |
| log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address); |
| goto dhcp4_address_fail; |
| } |
| |
| r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m"); |
| |
| r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address); |
| } |
| |
| dhcp4_address_fail: |
| |
| if (ipv4ll_address) { |
| r = in_addr_from_string(AF_INET, ipv4ll_address, &address); |
| if (r < 0) { |
| log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address); |
| goto ipv4ll_address_fail; |
| } |
| |
| r = sd_ipv4ll_new(&link->ipv4ll); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m"); |
| |
| r = sd_ipv4ll_set_address(link->ipv4ll, &address.in); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address); |
| } |
| |
| ipv4ll_address_fail: |
| |
| return 0; |
| } |
| |
| int link_add(Manager *m, sd_netlink_message *message, Link **ret) { |
| _cleanup_(sd_device_unrefp) sd_device *device = NULL; |
| char ifindex_str[2 + DECIMAL_STR_MAX(int)]; |
| Link *link; |
| int r; |
| |
| assert(m); |
| assert(m->rtnl); |
| assert(message); |
| assert(ret); |
| |
| r = link_new(m, message, ret); |
| if (r < 0) |
| return r; |
| |
| link = *ret; |
| |
| log_link_debug(link, "Link %d added", link->ifindex); |
| |
| r = link_load(link); |
| if (r < 0) |
| return r; |
| |
| if (path_is_read_only_fs("/sys") <= 0) { |
| /* udev should be around */ |
| sprintf(ifindex_str, "n%d", link->ifindex); |
| r = sd_device_new_from_device_id(&device, ifindex_str); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m"); |
| return 0; |
| } |
| |
| r = sd_device_get_is_initialized(device); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m"); |
| goto failed; |
| } |
| if (r == 0) { |
| /* not yet ready */ |
| log_link_debug(link, "link pending udev initialization..."); |
| return 0; |
| } |
| |
| r = device_is_renaming(device); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m"); |
| goto failed; |
| } |
| if (r > 0) { |
| log_link_debug(link, "Interface is being renamed, pending initialization."); |
| return 0; |
| } |
| |
| r = link_initialized(link, device); |
| if (r < 0) |
| goto failed; |
| } else { |
| r = link_initialized_and_synced(link); |
| if (r < 0) |
| goto failed; |
| } |
| |
| return 0; |
| failed: |
| link_enter_failed(link); |
| return r; |
| } |
| |
| int link_ipv6ll_gained(Link *link, const struct in6_addr *address) { |
| int r; |
| |
| assert(link); |
| |
| log_link_info(link, "Gained IPv6LL"); |
| |
| link->ipv6ll_address = *address; |
| link_check_ready(link); |
| |
| if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) { |
| r = link_acquire_ipv6_conf(link); |
| if (r < 0) { |
| link_enter_failed(link); |
| return r; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int link_carrier_gained(Link *link) { |
| int r; |
| |
| assert(link); |
| |
| r = wifi_get_info(link); |
| if (r < 0) |
| return r; |
| if (r > 0) { |
| r = link_reconfigure_internal(link, NULL, false); |
| if (r < 0) { |
| link_enter_failed(link); |
| return r; |
| } |
| } |
| |
| if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) { |
| r = link_acquire_conf(link); |
| if (r < 0) { |
| link_enter_failed(link); |
| return r; |
| } |
| |
| link_set_state(link, LINK_STATE_CONFIGURING); |
| r = link_request_set_addresses(link); |
| if (r < 0) |
| return r; |
| } |
| |
| r = link_handle_bound_by_list(link); |
| if (r < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| static int link_carrier_lost(Link *link) { |
| int r; |
| |
| assert(link); |
| |
| if (link->network && link->network->ignore_carrier_loss) |
| return 0; |
| |
| /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop. |
| * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the |
| * configuration and stop the clients as well. */ |
| if (link->setting_mtu) |
| return 0; |
| |
| r = link_stop_clients(link, false); |
| if (r < 0) { |
| link_enter_failed(link); |
| return r; |
| } |
| |
| if (link_dhcp4_server_enabled(link)) |
| (void) sd_dhcp_server_stop(link->dhcp_server); |
| |
| r = link_drop_config(link); |
| if (r < 0) |
| return r; |
| |
| if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) { |
| log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state)); |
| r = link_drop_foreign_config(link); |
| if (r < 0) |
| return r; |
| } |
| |
| r = link_handle_bound_by_list(link); |
| if (r < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| int link_carrier_reset(Link *link) { |
| int r; |
| |
| assert(link); |
| |
| if (link_has_carrier(link)) { |
| r = link_carrier_lost(link); |
| if (r < 0) |
| return r; |
| |
| r = link_carrier_gained(link); |
| if (r < 0) |
| return r; |
| |
| log_link_info(link, "Reset carrier"); |
| } |
| |
| return 0; |
| } |
| |
| /* This is called every time an interface admin state changes to up; |
| * specifically, when IFF_UP flag changes from unset to set */ |
| static int link_admin_state_up(Link *link) { |
| int r; |
| |
| /* We set the ipv6 mtu after the device mtu, but the kernel resets |
| * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for |
| * ipv6_mtu_set prevents this from trying to set it too early before |
| * the link->network has been setup; we only need to reset it |
| * here if we've already set it during normal initialization. */ |
| if (link->ipv6_mtu_set) { |
| r = link_set_ipv6_mtu(link); |
| if (r < 0) |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| int link_update(Link *link, sd_netlink_message *m) { |
| _cleanup_strv_free_ char **s = NULL; |
| struct ether_addr mac; |
| const char *ifname; |
| uint32_t mtu; |
| bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up; |
| int old_master, r; |
| |
| assert(link); |
| assert(link->ifname); |
| assert(m); |
| |
| if (link->state == LINK_STATE_LINGER) { |
| log_link_info(link, "Link re-added"); |
| link_set_state(link, LINK_STATE_CONFIGURING); |
| |
| r = link_new_carrier_maps(link); |
| if (r < 0) |
| return r; |
| } |
| |
| r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname); |
| if (r >= 0 && !streq(ifname, link->ifname)) { |
| Manager *manager = link->manager; |
| |
| log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname); |
| |
| link_drop(link); |
| r = link_add(manager, m, &link); |
| if (r < 0) |
| return r; |
| } |
| |
| r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s); |
| if (r >= 0) |
| strv_free_and_replace(link->alternative_names, s); |
| |
| r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu); |
| if (r >= 0 && mtu > 0) { |
| link->mtu = mtu; |
| if (link->original_mtu == 0) { |
| link->original_mtu = mtu; |
| log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu); |
| } |
| |
| if (link->dhcp_client) { |
| r = sd_dhcp_client_set_mtu(link->dhcp_client, |
| link->mtu); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m"); |
| } |
| |
| if (link->radv) { |
| r = sd_radv_set_mtu(link->radv, link->mtu); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m"); |
| } |
| } |
| |
| /* The kernel may broadcast NEWLINK messages without the MAC address |
| set, simply ignore them. */ |
| r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac); |
| if (r >= 0) { |
| if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, |
| ETH_ALEN)) { |
| |
| memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, |
| ETH_ALEN); |
| |
| log_link_debug(link, "MAC address: " |
| "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx", |
| mac.ether_addr_octet[0], |
| mac.ether_addr_octet[1], |
| mac.ether_addr_octet[2], |
| mac.ether_addr_octet[3], |
| mac.ether_addr_octet[4], |
| mac.ether_addr_octet[5]); |
| |
| if (link->ipv4ll) { |
| r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m"); |
| } |
| |
| if (link->dhcp_client) { |
| 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_warning_errno(link, r, "Could not update MAC address in DHCP client: %m"); |
| |
| r = dhcp4_set_client_identifier(link); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link->dhcp6_client) { |
| const DUID* duid = link_get_duid(link); |
| |
| r = sd_dhcp6_client_set_mac(link->dhcp6_client, |
| (const uint8_t *) &link->mac, |
| sizeof (link->mac), |
| ARPHRD_ETHER); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m"); |
| |
| if (link->network->iaid_set) { |
| r = sd_dhcp6_client_set_iaid(link->dhcp6_client, |
| link->network->iaid); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m"); |
| } |
| |
| r = sd_dhcp6_client_set_duid(link->dhcp6_client, |
| duid->type, |
| duid->raw_data_len > 0 ? duid->raw_data : NULL, |
| duid->raw_data_len); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m"); |
| } |
| |
| if (link->radv) { |
| r = sd_radv_set_mac(link->radv, &link->mac); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m"); |
| } |
| |
| if (link->ndisc) { |
| r = sd_ndisc_set_mac(link->ndisc, &link->mac); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m"); |
| } |
| } |
| } |
| |
| old_master = link->master_ifindex; |
| (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex); |
| |
| link_was_admin_up = link->flags & IFF_UP; |
| had_carrier = link_has_carrier(link); |
| |
| r = link_update_flags(link, m, old_master != link->master_ifindex); |
| if (r < 0) |
| return r; |
| |
| if (!link_was_admin_up && (link->flags & IFF_UP)) { |
| log_link_info(link, "Link UP"); |
| |
| r = link_admin_state_up(link); |
| if (r < 0) |
| return r; |
| } else if (link_was_admin_up && !(link->flags & IFF_UP)) |
| log_link_info(link, "Link DOWN"); |
| |
| r = link_update_lldp(link); |
| if (r < 0) |
| return r; |
| |
| carrier_gained = !had_carrier && link_has_carrier(link); |
| carrier_lost = had_carrier && !link_has_carrier(link); |
| |
| if (carrier_gained) { |
| log_link_info(link, "Gained carrier"); |
| |
| r = link_carrier_gained(link); |
| if (r < 0) |
| return r; |
| } else if (carrier_lost) { |
| log_link_info(link, "Lost carrier"); |
| |
| r = link_carrier_lost(link); |
| if (r < 0) |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) { |
| bool space = false; |
| Iterator i; |
| Link *link; |
| |
| assert(f); |
| assert(prefix); |
| |
| if (hashmap_isempty(h)) |
| return; |
| |
| fputs(prefix, f); |
| HASHMAP_FOREACH(link, h, i) { |
| if (space) |
| fputc(' ', f); |
| |
| fprintf(f, "%i", link->ifindex); |
| space = true; |
| } |
| |
| fputc('\n', f); |
| } |
| |
| static void link_save_dns(FILE *f, struct in_addr_data *dns, unsigned n_dns, bool *space) { |
| unsigned j; |
| int r; |
| |
| for (j = 0; j < n_dns; j++) { |
| _cleanup_free_ char *b = NULL; |
| |
| r = in_addr_to_string(dns[j].family, &dns[j].address, &b); |
| if (r < 0) { |
| log_debug_errno(r, "Failed to format address, ignoring: %m"); |
| continue; |
| } |
| |
| if (*space) |
| fputc(' ', f); |
| fputs(b, f); |
| *space = true; |
| } |
| } |
| |
| int link_save(Link *link) { |
| _cleanup_free_ char *temp_path = NULL; |
| _cleanup_fclose_ FILE *f = NULL; |
| const char *admin_state, *oper_state, *carrier_state, *address_state; |
| Address *a; |
| Route *route; |
| Iterator i; |
| int r; |
| |
| assert(link); |
| assert(link->state_file); |
| assert(link->lease_file); |
| assert(link->manager); |
| |
| if (link->state == LINK_STATE_LINGER) { |
| (void) unlink(link->state_file); |
| return 0; |
| } |
| |
| link_lldp_save(link); |
| |
| admin_state = link_state_to_string(link->state); |
| assert(admin_state); |
| |
| oper_state = link_operstate_to_string(link->operstate); |
| assert(oper_state); |
| |
| carrier_state = link_carrier_state_to_string(link->carrier_state); |
| assert(carrier_state); |
| |
| address_state = link_address_state_to_string(link->address_state); |
| assert(address_state); |
| |
| r = fopen_temporary(link->state_file, &f, &temp_path); |
| if (r < 0) |
| goto fail; |
| |
| (void) fchmod(fileno(f), 0644); |
| |
| fprintf(f, |
| "# This is private data. Do not parse.\n" |
| "ADMIN_STATE=%s\n" |
| "OPER_STATE=%s\n" |
| "CARRIER_STATE=%s\n" |
| "ADDRESS_STATE=%s\n", |
| admin_state, oper_state, carrier_state, address_state); |
| |
| if (link->network) { |
| char **dhcp6_domains = NULL, **dhcp_domains = NULL; |
| const char *dhcp_domainname = NULL, *p; |
| sd_dhcp6_lease *dhcp6_lease = NULL; |
| bool space; |
| |
| fprintf(f, "REQUIRED_FOR_ONLINE=%s\n", |
| yes_no(link->network->required_for_online)); |
| |
| fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s", |
| strempty(link_operstate_to_string(link->network->required_operstate_for_online.min))); |
| |
| if (link->network->required_operstate_for_online.max != LINK_OPERSTATE_RANGE_DEFAULT.max) |
| fprintf(f, ":%s", |
| strempty(link_operstate_to_string(link->network->required_operstate_for_online.max))); |
| |
| fprintf(f, "\n"); |
| |
| if (link->dhcp6_client) { |
| r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease); |
| if (r < 0 && r != -ENOMSG) |
| log_link_debug(link, "No DHCPv6 lease"); |
| } |
| |
| fprintf(f, "NETWORK_FILE=%s\n", link->network->filename); |
| |
| fputs("DNS=", f); |
| space = false; |
| |
| if (link->n_dns != (unsigned) -1) |
| link_save_dns(f, link->dns, link->n_dns, &space); |
| else |
| link_save_dns(f, link->network->dns, link->network->n_dns, &space); |
| |
| if (link->network->dhcp_use_dns && |
| link->dhcp_lease) { |
| const struct in_addr *addresses; |
| |
| r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses); |
| if (r > 0) |
| if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0) |
| space = true; |
| } |
| |
| if (link->network->dhcp6_use_dns && dhcp6_lease) { |
| struct in6_addr *in6_addrs; |
| |
| r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs); |
| if (r > 0) { |
| if (space) |
| fputc(' ', f); |
| serialize_in6_addrs(f, in6_addrs, r); |
| space = true; |
| } |
| } |
| |
| /* Make sure to flush out old entries before we use the NDISC data */ |
| ndisc_vacuum(link); |
| |
| if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) { |
| NDiscRDNSS *dd; |
| |
| SET_FOREACH(dd, link->ndisc_rdnss, i) { |
| if (space) |
| fputc(' ', f); |
| |
| serialize_in6_addrs(f, &dd->address, 1); |
| space = true; |
| } |
| } |
| |
| fputc('\n', f); |
| |
| fputs("NTP=", f); |
| space = false; |
| fputstrv(f, link->ntp ?: link->network->ntp, NULL, &space); |
| |
| if (link->network->dhcp_use_ntp && |
| link->dhcp_lease) { |
| const struct in_addr *addresses; |
| |
| r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses); |
| if (r > 0) |
| if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0) |
| space = true; |
| } |
| |
| fputc('\n', f); |
| |
| fputs("SIP=", f); |
| space = false; |
| fputstrv(f, link->network->sip, NULL, &space); |
| |
| if (link->network->dhcp_use_sip && |
| link->dhcp_lease) { |
| const struct in_addr *addresses; |
| |
| r = sd_dhcp_lease_get_sip(link->dhcp_lease, &addresses); |
| if (r > 0) |
| if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0) |
| space = true; |
| } |
| |
| if (link->network->dhcp6_use_ntp && dhcp6_lease) { |
| struct in6_addr *in6_addrs; |
| char **hosts; |
| |
| r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease, |
| &in6_addrs); |
| if (r > 0) { |
| if (space) |
| fputc(' ', f); |
| serialize_in6_addrs(f, in6_addrs, r); |
| space = true; |
| } |
| |
| r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts); |
| if (r > 0) |
| fputstrv(f, hosts, NULL, &space); |
| } |
| |
| fputc('\n', f); |
| |
| if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) { |
| if (link->dhcp_lease) { |
| (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname); |
| (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains); |
| } |
| if (dhcp6_lease) |
| (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains); |
| } |
| |
| fputs("DOMAINS=", f); |
| space = false; |
| ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains, i) |
| fputs_with_space(f, p, NULL, &space); |
| |
| if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) { |
| if (dhcp_domainname) |
| fputs_with_space(f, dhcp_domainname, NULL, &space); |
| if (dhcp_domains) |
| fputstrv(f, dhcp_domains, NULL, &space); |
| if (dhcp6_domains) |
| fputstrv(f, dhcp6_domains, NULL, &space); |
| } |
| |
| if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) { |
| NDiscDNSSL *dd; |
| |
| SET_FOREACH(dd, link->ndisc_dnssl, i) |
| fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space); |
| } |
| |
| fputc('\n', f); |
| |
| fputs("ROUTE_DOMAINS=", f); |
| space = false; |
| ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains, i) |
| fputs_with_space(f, p, NULL, &space); |
| |
| if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) { |
| if (dhcp_domainname) |
| fputs_with_space(f, dhcp_domainname, NULL, &space); |
| if (dhcp_domains) |
| fputstrv(f, dhcp_domains, NULL, &space); |
| if (dhcp6_domains) |
| fputstrv(f, dhcp6_domains, NULL, &space); |
| } |
| |
| if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) { |
| NDiscDNSSL *dd; |
| |
| SET_FOREACH(dd, link->ndisc_dnssl, i) |
| fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space); |
| } |
| |
| fputc('\n', f); |
| |
| fprintf(f, "LLMNR=%s\n", |
| resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr)); |
| fprintf(f, "MDNS=%s\n", |
| resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns)); |
| if (link->dns_default_route >= 0) |
| fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->dns_default_route)); |
| else if (link->network->dns_default_route >= 0) |
| fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route)); |
| |
| if (link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID) |
| fprintf(f, "DNS_OVER_TLS=%s\n", |
| dns_over_tls_mode_to_string(link->dns_over_tls_mode)); |
| else if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID) |
| fprintf(f, "DNS_OVER_TLS=%s\n", |
| dns_over_tls_mode_to_string(link->network->dns_over_tls_mode)); |
| |
| if (link->dnssec_mode != _DNSSEC_MODE_INVALID) |
| fprintf(f, "DNSSEC=%s\n", |
| dnssec_mode_to_string(link->dnssec_mode)); |
| else if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID) |
| fprintf(f, "DNSSEC=%s\n", |
| dnssec_mode_to_string(link->network->dnssec_mode)); |
| |
| if (!set_isempty(link->dnssec_negative_trust_anchors)) { |
| const char *n; |
| |
| fputs("DNSSEC_NTA=", f); |
| space = false; |
| SET_FOREACH(n, link->dnssec_negative_trust_anchors, i) |
| fputs_with_space(f, n, NULL, &space); |
| fputc('\n', f); |
| } else if (!set_isempty(link->network->dnssec_negative_trust_anchors)) { |
| const char *n; |
| |
| fputs("DNSSEC_NTA=", f); |
| space = false; |
| SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i) |
| fputs_with_space(f, n, NULL, &space); |
| fputc('\n', f); |
| } |
| |
| fputs("ADDRESSES=", f); |
| space = false; |
| SET_FOREACH(a, link->addresses, i) { |
| _cleanup_free_ char *address_str = NULL; |
| |
| r = in_addr_to_string(a->family, &a->in_addr, &address_str); |
| if (r < 0) |
| goto fail; |
| |
| fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen); |
| space = true; |
| } |
| fputc('\n', f); |
| |
| fputs("ROUTES=", f); |
| space = false; |
| SET_FOREACH(route, link->routes, i) { |
| _cleanup_free_ char *route_str = NULL; |
| |
| r = in_addr_to_string(route->family, &route->dst, &route_str); |
| if (r < 0) |
| goto fail; |
| |
| fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT, |
| space ? " " : "", route_str, |
| route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime); |
| space = true; |
| } |
| |
| fputc('\n', f); |
| } |
| |
| print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links); |
| print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links); |
| |
| if (link->dhcp_lease) { |
| struct in_addr address; |
| const char *tz = NULL; |
| |
| assert(link->network); |
| |
| r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz); |
| if (r >= 0) |
| fprintf(f, "TIMEZONE=%s\n", tz); |
| |
| r = sd_dhcp_lease_get_address(link->dhcp_lease, &address); |
| if (r >= 0) { |
| fputs("DHCP4_ADDRESS=", f); |
| serialize_in_addrs(f, &address, 1, false, NULL); |
| fputc('\n', f); |
| } |
| |
| r = dhcp_lease_save(link->dhcp_lease, link->lease_file); |
| if (r < 0) |
| goto fail; |
| |
| fprintf(f, |
| "DHCP_LEASE=%s\n", |
| link->lease_file); |
| } else |
| (void) unlink(link->lease_file); |
| |
| if (link->ipv4ll) { |
| struct in_addr address; |
| |
| r = sd_ipv4ll_get_address(link->ipv4ll, &address); |
| if (r >= 0) { |
| fputs("IPV4LL_ADDRESS=", f); |
| serialize_in_addrs(f, &address, 1, false, NULL); |
| fputc('\n', f); |
| } |
| } |
| |
| r = fflush_and_check(f); |
| if (r < 0) |
| goto fail; |
| |
| if (rename(temp_path, link->state_file) < 0) { |
| r = -errno; |
| goto fail; |
| } |
| |
| return 0; |
| |
| fail: |
| (void) unlink(link->state_file); |
| if (temp_path) |
| (void) unlink(temp_path); |
| |
| return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file); |
| } |
| |
| /* The serialized state in /run is no longer up-to-date. */ |
| void link_dirty(Link *link) { |
| int r; |
| |
| assert(link); |
| |
| /* mark manager dirty as link is dirty */ |
| manager_dirty(link->manager); |
| |
| r = set_ensure_allocated(&link->manager->dirty_links, NULL); |
| if (r < 0) |
| /* allocation errors are ignored */ |
| return; |
| |
| r = set_put(link->manager->dirty_links, link); |
| if (r <= 0) |
| /* don't take another ref if the link was already dirty */ |
| return; |
| |
| link_ref(link); |
| } |
| |
| /* The serialized state in /run is up-to-date */ |
| void link_clean(Link *link) { |
| assert(link); |
| assert(link->manager); |
| |
| link_unref(set_remove(link->manager->dirty_links, link)); |
| } |
| |
| static const char* const link_state_table[_LINK_STATE_MAX] = { |
| [LINK_STATE_PENDING] = "pending", |
| [LINK_STATE_INITIALIZED] = "initialized", |
| [LINK_STATE_CONFIGURING] = "configuring", |
| [LINK_STATE_CONFIGURED] = "configured", |
| [LINK_STATE_UNMANAGED] = "unmanaged", |
| [LINK_STATE_FAILED] = "failed", |
| [LINK_STATE_LINGER] = "linger", |
| }; |
| |
| DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState); |
| |
| int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) { |
| const char *err_msg = NULL; |
| |
| (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg); |
| return log_link_full(link, level, err, "%s: %s%s%m", msg, strempty(err_msg), err_msg ? " " : ""); |
| } |