| /* SPDX-License-Identifier: LGPL-2.1+ */ |
| |
| #include <netinet/ether.h> |
| #include <linux/if.h> |
| |
| #include "alloc-util.h" |
| #include "hostname-util.h" |
| #include "parse-util.h" |
| #include "network-internal.h" |
| #include "networkd-link.h" |
| #include "networkd-manager.h" |
| #include "networkd-network.h" |
| #include "string-util.h" |
| #include "sysctl-util.h" |
| |
| static int dhcp4_route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| int r; |
| |
| assert(link); |
| assert(link->dhcp4_messages > 0); |
| |
| link->dhcp4_messages--; |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r < 0 && r != -EEXIST) { |
| log_link_error_errno(link, r, "Could not set DHCPv4 route: %m"); |
| link_enter_failed(link); |
| } |
| |
| if (link->dhcp4_messages == 0) { |
| link->dhcp4_configured = true; |
| link_check_ready(link); |
| } |
| |
| return 1; |
| } |
| |
| static int route_scope_from_address(const Route *route, const struct in_addr *self_addr) { |
| assert(route); |
| assert(self_addr); |
| |
| if (in_addr_is_localhost(AF_INET, &route->dst) || |
| (self_addr->s_addr && route->dst.in.s_addr == self_addr->s_addr)) |
| return RT_SCOPE_HOST; |
| else if (in4_addr_is_null(&route->gw.in)) |
| return RT_SCOPE_LINK; |
| else |
| return RT_SCOPE_UNIVERSE; |
| } |
| |
| static int link_set_dhcp_routes(Link *link) { |
| _cleanup_free_ sd_dhcp_route **static_routes = NULL; |
| bool classless_route = false, static_route = false; |
| const struct in_addr *router; |
| struct in_addr address; |
| int r, n, i; |
| uint32_t table; |
| |
| assert(link); |
| |
| if (!link->dhcp_lease) /* link went down while we configured the IP addresses? */ |
| return 0; |
| |
| if (!link->network) /* link went down while we configured the IP addresses? */ |
| return 0; |
| |
| if (!link->network->dhcp_use_routes) |
| return 0; |
| |
| table = link_get_dhcp_route_table(link); |
| |
| r = sd_dhcp_lease_get_address(link->dhcp_lease, &address); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "DHCP error: could not get address: %m"); |
| |
| n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes); |
| if (n == -ENODATA) |
| log_link_debug_errno(link, n, "DHCP: No routes received from DHCP server: %m"); |
| else if (n < 0) |
| log_link_debug_errno(link, n, "DHCP error: could not get routes: %m"); |
| |
| for (i = 0; i < n; i++) { |
| switch (sd_dhcp_route_get_option(static_routes[i])) { |
| case SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE: |
| classless_route = true; |
| break; |
| case SD_DHCP_OPTION_STATIC_ROUTE: |
| static_route = true; |
| break; |
| } |
| } |
| |
| for (i = 0; i < n; i++) { |
| _cleanup_(route_freep) Route *route = NULL; |
| |
| /* if the DHCP server returns both a Classless Static Routes option and a Static Routes option, |
| the DHCP client MUST ignore the Static Routes option. */ |
| if (classless_route && |
| sd_dhcp_route_get_option(static_routes[i]) != SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE) |
| continue; |
| |
| r = route_new(&route); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not allocate route: %m"); |
| |
| route->family = AF_INET; |
| route->protocol = RTPROT_DHCP; |
| assert_se(sd_dhcp_route_get_gateway(static_routes[i], &route->gw.in) >= 0); |
| assert_se(sd_dhcp_route_get_destination(static_routes[i], &route->dst.in) >= 0); |
| assert_se(sd_dhcp_route_get_destination_prefix_length(static_routes[i], &route->dst_prefixlen) >= 0); |
| route->priority = link->network->dhcp_route_metric; |
| route->table = table; |
| route->scope = route_scope_from_address(route, &address); |
| |
| r = route_configure(route, link, dhcp4_route_handler); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not set host route: %m"); |
| |
| link->dhcp4_messages++; |
| } |
| |
| r = sd_dhcp_lease_get_router(link->dhcp_lease, &router); |
| if (IN_SET(r, 0, -ENODATA)) |
| log_link_info(link, "DHCP: No gateway received from DHCP server."); |
| else if (r < 0) |
| log_link_warning_errno(link, r, "DHCP error: could not get gateway: %m"); |
| else if (in4_addr_is_null(&router[0])) |
| log_link_info(link, "DHCP: Received gateway is null."); |
| |
| /* According to RFC 3442: If the DHCP server returns both a Classless Static Routes option and |
| a Router option, the DHCP client MUST ignore the Router option. */ |
| if (classless_route && static_route) |
| log_link_warning(link, "Classless static routes received from DHCP server: ignoring static-route option and router option"); |
| |
| if (r > 0 && !classless_route && !in4_addr_is_null(&router[0])) { |
| _cleanup_(route_freep) Route *route = NULL, *route_gw = NULL; |
| |
| r = route_new(&route_gw); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not allocate route: %m"); |
| |
| /* The dhcp netmask may mask out the gateway. Add an explicit |
| * route for the gw host so that we can route no matter the |
| * netmask or existing kernel route tables. */ |
| route_gw->family = AF_INET; |
| route_gw->dst.in = router[0]; |
| route_gw->dst_prefixlen = 32; |
| route_gw->prefsrc.in = address; |
| route_gw->scope = RT_SCOPE_LINK; |
| route_gw->protocol = RTPROT_DHCP; |
| route_gw->priority = link->network->dhcp_route_metric; |
| route_gw->table = table; |
| |
| r = route_configure(route_gw, link, dhcp4_route_handler); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not set host route: %m"); |
| |
| link->dhcp4_messages++; |
| |
| r = route_new(&route); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not allocate route: %m"); |
| |
| route->family = AF_INET; |
| route->gw.in = router[0]; |
| route->prefsrc.in = address; |
| route->protocol = RTPROT_DHCP; |
| route->priority = link->network->dhcp_route_metric; |
| route->table = table; |
| |
| r = route_configure(route, link, dhcp4_route_handler); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "Could not set routes: %m"); |
| link_enter_failed(link); |
| return r; |
| } |
| |
| link->dhcp4_messages++; |
| } |
| |
| return 0; |
| } |
| |
| static int dhcp_lease_lost(Link *link) { |
| _cleanup_(address_freep) Address *address = NULL; |
| const struct in_addr *router; |
| struct in_addr addr; |
| struct in_addr netmask; |
| unsigned prefixlen = 0; |
| int r; |
| |
| assert(link); |
| assert(link->dhcp_lease); |
| |
| log_link_warning(link, "DHCP lease lost"); |
| |
| if (link->network->dhcp_use_routes) { |
| _cleanup_free_ sd_dhcp_route **routes = NULL; |
| int n, i; |
| |
| n = sd_dhcp_lease_get_routes(link->dhcp_lease, &routes); |
| if (n >= 0) { |
| for (i = 0; i < n; i++) { |
| _cleanup_(route_freep) Route *route = NULL; |
| |
| r = route_new(&route); |
| if (r >= 0) { |
| route->family = AF_INET; |
| assert_se(sd_dhcp_route_get_gateway(routes[i], &route->gw.in) >= 0); |
| assert_se(sd_dhcp_route_get_destination(routes[i], &route->dst.in) >= 0); |
| assert_se(sd_dhcp_route_get_destination_prefix_length(routes[i], &route->dst_prefixlen) >= 0); |
| |
| route_remove(route, link, NULL); |
| } |
| } |
| } |
| } |
| |
| r = address_new(&address); |
| if (r >= 0) { |
| r = sd_dhcp_lease_get_router(link->dhcp_lease, &router); |
| if (r > 0 && !in4_addr_is_null(&router[0])) { |
| _cleanup_(route_freep) Route *route_gw = NULL; |
| _cleanup_(route_freep) Route *route = NULL; |
| |
| r = route_new(&route_gw); |
| if (r >= 0) { |
| route_gw->family = AF_INET; |
| route_gw->dst.in = router[0]; |
| route_gw->dst_prefixlen = 32; |
| route_gw->scope = RT_SCOPE_LINK; |
| |
| route_remove(route_gw, link, NULL); |
| } |
| |
| r = route_new(&route); |
| if (r >= 0) { |
| route->family = AF_INET; |
| route->gw.in = router[0]; |
| |
| route_remove(route, link, NULL); |
| } |
| } |
| |
| r = sd_dhcp_lease_get_address(link->dhcp_lease, &addr); |
| if (r >= 0) { |
| r = sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask); |
| if (r >= 0) |
| prefixlen = in4_addr_netmask_to_prefixlen(&netmask); |
| |
| address->family = AF_INET; |
| address->in_addr.in = addr; |
| address->prefixlen = prefixlen; |
| |
| address_remove(address, link, NULL); |
| } |
| } |
| |
| if (link->network->dhcp_use_mtu) { |
| uint16_t mtu; |
| |
| r = sd_dhcp_lease_get_mtu(link->dhcp_lease, &mtu); |
| if (r >= 0 && link->original_mtu != mtu) { |
| r = link_set_mtu(link, link->original_mtu, true); |
| if (r < 0) { |
| log_link_warning(link, |
| "DHCP error: could not reset MTU"); |
| link_enter_failed(link); |
| return r; |
| } |
| } |
| } |
| |
| if (link->network->dhcp_use_hostname) { |
| const char *hostname = NULL; |
| |
| if (link->network->dhcp_hostname) |
| hostname = link->network->dhcp_hostname; |
| else |
| (void) sd_dhcp_lease_get_hostname(link->dhcp_lease, &hostname); |
| |
| if (hostname) { |
| /* If a hostname was set due to the lease, then unset it now. */ |
| r = manager_set_hostname(link->manager, NULL); |
| if (r < 0) |
| log_link_warning_errno(link, r, "Failed to reset transient hostname: %m"); |
| } |
| } |
| |
| link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease); |
| link_dirty(link); |
| link->dhcp4_configured = false; |
| |
| return 0; |
| } |
| |
| static int dhcp4_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| int r; |
| |
| assert(link); |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r < 0 && r != -EEXIST) { |
| log_link_error_errno(link, r, "Could not set DHCPv4 address: %m"); |
| link_enter_failed(link); |
| } else if (r >= 0) |
| manager_rtnl_process_address(rtnl, m, link->manager); |
| |
| link_set_dhcp_routes(link); |
| |
| if (link->dhcp4_messages == 0) { |
| link->dhcp4_configured = true; |
| link_check_ready(link); |
| } |
| |
| return 1; |
| } |
| |
| static int dhcp4_update_address(Link *link, |
| struct in_addr *address, |
| struct in_addr *netmask, |
| uint32_t lifetime) { |
| _cleanup_(address_freep) Address *addr = NULL; |
| unsigned prefixlen; |
| int r; |
| |
| assert(address); |
| assert(netmask); |
| assert(lifetime); |
| |
| prefixlen = in4_addr_netmask_to_prefixlen(netmask); |
| |
| r = address_new(&addr); |
| if (r < 0) |
| return r; |
| |
| addr->family = AF_INET; |
| addr->in_addr.in.s_addr = address->s_addr; |
| addr->cinfo.ifa_prefered = lifetime; |
| addr->cinfo.ifa_valid = lifetime; |
| addr->prefixlen = prefixlen; |
| addr->broadcast.s_addr = address->s_addr | ~netmask->s_addr; |
| |
| /* allow reusing an existing address and simply update its lifetime |
| * in case it already exists */ |
| r = address_configure(addr, link, dhcp4_address_handler, true); |
| if (r < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| static int dhcp_lease_renew(sd_dhcp_client *client, Link *link) { |
| sd_dhcp_lease *lease; |
| struct in_addr address; |
| struct in_addr netmask; |
| uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME; |
| int r; |
| |
| assert(link); |
| assert(client); |
| assert(link->network); |
| |
| r = sd_dhcp_client_get_lease(client, &lease); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "DHCP error: no lease: %m"); |
| |
| sd_dhcp_lease_unref(link->dhcp_lease); |
| link->dhcp4_configured = false; |
| link->dhcp_lease = sd_dhcp_lease_ref(lease); |
| link_dirty(link); |
| |
| r = sd_dhcp_lease_get_address(lease, &address); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "DHCP error: no address: %m"); |
| |
| r = sd_dhcp_lease_get_netmask(lease, &netmask); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "DHCP error: no netmask: %m"); |
| |
| if (!link->network->dhcp_critical) { |
| r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "DHCP error: no lifetime: %m"); |
| } |
| |
| r = dhcp4_update_address(link, &address, &netmask, lifetime); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "Could not update IP address: %m"); |
| link_enter_failed(link); |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) { |
| const struct in_addr *router; |
| sd_dhcp_lease *lease; |
| struct in_addr address; |
| struct in_addr netmask; |
| unsigned prefixlen; |
| uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME; |
| int r; |
| |
| assert(client); |
| assert(link); |
| |
| r = sd_dhcp_client_get_lease(client, &lease); |
| if (r < 0) |
| return log_link_error_errno(link, r, "DHCP error: No lease: %m"); |
| |
| r = sd_dhcp_lease_get_address(lease, &address); |
| if (r < 0) |
| return log_link_error_errno(link, r, "DHCP error: No address: %m"); |
| |
| r = sd_dhcp_lease_get_netmask(lease, &netmask); |
| if (r < 0) |
| return log_link_error_errno(link, r, "DHCP error: No netmask: %m"); |
| |
| prefixlen = in4_addr_netmask_to_prefixlen(&netmask); |
| |
| r = sd_dhcp_lease_get_router(lease, &router); |
| if (r < 0 && r != -ENODATA) |
| return log_link_error_errno(link, r, "DHCP error: Could not get gateway: %m"); |
| |
| if (r > 0 && !in4_addr_is_null(&router[0])) |
| log_struct(LOG_INFO, |
| LOG_LINK_INTERFACE(link), |
| LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u", |
| ADDRESS_FMT_VAL(address), |
| prefixlen, |
| ADDRESS_FMT_VAL(router[0])), |
| "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address), |
| "PREFIXLEN=%u", prefixlen, |
| "GATEWAY=%u.%u.%u.%u", ADDRESS_FMT_VAL(router[0])); |
| else |
| log_struct(LOG_INFO, |
| LOG_LINK_INTERFACE(link), |
| LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u", |
| ADDRESS_FMT_VAL(address), |
| prefixlen), |
| "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address), |
| "PREFIXLEN=%u", prefixlen); |
| |
| link->dhcp_lease = sd_dhcp_lease_ref(lease); |
| link_dirty(link); |
| |
| if (link->network->dhcp_use_mtu) { |
| uint16_t mtu; |
| |
| r = sd_dhcp_lease_get_mtu(lease, &mtu); |
| if (r >= 0) { |
| r = link_set_mtu(link, mtu, true); |
| if (r < 0) |
| log_link_error_errno(link, r, "Failed to set MTU to %" PRIu16 ": %m", mtu); |
| } |
| } |
| |
| if (link->network->dhcp_use_hostname) { |
| const char *dhcpname = NULL; |
| _cleanup_free_ char *hostname = NULL; |
| |
| if (link->network->dhcp_hostname) |
| dhcpname = link->network->dhcp_hostname; |
| else |
| (void) sd_dhcp_lease_get_hostname(lease, &dhcpname); |
| |
| if (dhcpname) { |
| r = shorten_overlong(dhcpname, &hostname); |
| if (r < 0) |
| log_link_warning_errno(link, r, "Unable to shorten overlong DHCP hostname '%s', ignoring: %m", dhcpname); |
| if (r == 1) |
| log_link_notice(link, "Overlong DCHP hostname received, shortened from '%s' to '%s'", dhcpname, hostname); |
| } |
| |
| if (hostname) { |
| r = manager_set_hostname(link->manager, hostname); |
| if (r < 0) |
| log_link_error_errno(link, r, "Failed to set transient hostname to '%s': %m", hostname); |
| } |
| } |
| |
| if (link->network->dhcp_use_timezone) { |
| const char *tz = NULL; |
| |
| (void) sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz); |
| |
| if (tz) { |
| r = manager_set_timezone(link->manager, tz); |
| if (r < 0) |
| log_link_error_errno(link, r, "Failed to set timezone to '%s': %m", tz); |
| } |
| } |
| |
| if (!link->network->dhcp_critical) { |
| r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "DHCP error: no lifetime: %m"); |
| } |
| |
| r = dhcp4_update_address(link, &address, &netmask, lifetime); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "Could not update IP address: %m"); |
| link_enter_failed(link); |
| return r; |
| } |
| |
| return 0; |
| } |
| static void dhcp4_handler(sd_dhcp_client *client, int event, void *userdata) { |
| Link *link = userdata; |
| int r = 0; |
| |
| assert(link); |
| assert(link->network); |
| assert(link->manager); |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
| return; |
| |
| switch (event) { |
| case SD_DHCP_CLIENT_EVENT_EXPIRED: |
| case SD_DHCP_CLIENT_EVENT_STOP: |
| case SD_DHCP_CLIENT_EVENT_IP_CHANGE: |
| if (link->network->dhcp_critical) { |
| log_link_error(link, "DHCPv4 connection considered system critical, ignoring request to reconfigure it."); |
| return; |
| } |
| |
| if (link->dhcp_lease) { |
| r = dhcp_lease_lost(link); |
| if (r < 0) { |
| link_enter_failed(link); |
| return; |
| } |
| } |
| |
| if (event == SD_DHCP_CLIENT_EVENT_IP_CHANGE) { |
| r = dhcp_lease_acquired(client, link); |
| if (r < 0) { |
| link_enter_failed(link); |
| return; |
| } |
| } |
| |
| break; |
| case SD_DHCP_CLIENT_EVENT_RENEW: |
| r = dhcp_lease_renew(client, link); |
| if (r < 0) { |
| link_enter_failed(link); |
| return; |
| } |
| break; |
| case SD_DHCP_CLIENT_EVENT_IP_ACQUIRE: |
| r = dhcp_lease_acquired(client, link); |
| if (r < 0) { |
| link_enter_failed(link); |
| return; |
| } |
| break; |
| default: |
| if (event < 0) |
| log_link_warning_errno(link, event, "DHCP error: Client failed: %m"); |
| else |
| log_link_warning(link, "DHCP unknown event: %i", event); |
| break; |
| } |
| |
| return; |
| } |
| |
| static int dhcp4_set_hostname(Link *link) { |
| _cleanup_free_ char *hostname = NULL; |
| const char *hn; |
| int r; |
| |
| assert(link); |
| |
| if (!link->network->dhcp_send_hostname) |
| hn = NULL; |
| else if (link->network->dhcp_hostname) |
| hn = link->network->dhcp_hostname; |
| else { |
| r = gethostname_strict(&hostname); |
| if (r < 0 && r != -ENXIO) /* ENXIO: no hostname set or hostname is "localhost" */ |
| return r; |
| |
| hn = hostname; |
| } |
| |
| r = sd_dhcp_client_set_hostname(link->dhcp_client, hn); |
| if (r == -EINVAL && hostname) |
| /* Ignore error when the machine's hostname is not suitable to send in DHCP packet. */ |
| log_link_warning_errno(link, r, "DHCP4 CLIENT: Failed to set hostname from kernel hostname, ignoring: %m"); |
| else if (r < 0) |
| return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set hostname: %m"); |
| |
| return 0; |
| } |
| |
| static bool promote_secondaries_enabled(const char *ifname) { |
| _cleanup_free_ char *promote_secondaries_sysctl = NULL; |
| char *promote_secondaries_path; |
| int r; |
| |
| promote_secondaries_path = strjoina("net/ipv4/conf/", ifname, "/promote_secondaries"); |
| r = sysctl_read(promote_secondaries_path, &promote_secondaries_sysctl); |
| if (r < 0) { |
| log_debug_errno(r, "Cannot read sysctl %s", promote_secondaries_path); |
| return false; |
| } |
| |
| truncate_nl(promote_secondaries_sysctl); |
| r = parse_boolean(promote_secondaries_sysctl); |
| if (r < 0) |
| log_warning_errno(r, "Cannot parse sysctl %s with content %s as boolean", promote_secondaries_path, promote_secondaries_sysctl); |
| return r > 0; |
| } |
| |
| /* dhcp4_set_promote_secondaries will ensure this interface has |
| * the "promote_secondaries" option in the kernel set. If this sysctl |
| * is not set DHCP will work only as long as the IP address does not |
| * changes between leases. The kernel will remove all secondary IP |
| * addresses of an interface otherwise. The way systemd-network works |
| * is that the new IP of a lease is added as a secondary IP and when |
| * the primary one expires it relies on the kernel to promote the |
| * secondary IP. See also https://github.com/systemd/systemd/issues/7163 |
| */ |
| int dhcp4_set_promote_secondaries(Link *link) { |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| assert(link->network->dhcp & ADDRESS_FAMILY_IPV4); |
| |
| /* check if the kernel has promote_secondaries enabled for our |
| * interface. If it is not globally enabled or enabled for the |
| * specific interface we must either enable it. |
| */ |
| if (!(promote_secondaries_enabled("all") || promote_secondaries_enabled(link->ifname))) { |
| char *promote_secondaries_path = NULL; |
| |
| log_link_debug(link, "promote_secondaries is unset, setting it"); |
| promote_secondaries_path = strjoina("net/ipv4/conf/", link->ifname, "/promote_secondaries"); |
| r = sysctl_write(promote_secondaries_path, "1"); |
| if (r < 0) |
| log_link_warning_errno(link, r, "cannot set sysctl %s to 1", promote_secondaries_path); |
| return r > 0; |
| } |
| |
| return 0; |
| } |
| |
| int dhcp4_set_client_identifier(Link *link) { |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| assert(link->dhcp_client); |
| |
| switch (link->network->dhcp_client_identifier) { |
| case DHCP_CLIENT_ID_DUID: { |
| /* If configured, apply user specified DUID and IAID */ |
| const DUID *duid = link_get_duid(link); |
| |
| if (duid->type == DUID_TYPE_LLT && duid->raw_data_len == 0) |
| r = sd_dhcp_client_set_iaid_duid_llt(link->dhcp_client, |
| link->network->iaid_set, |
| link->network->iaid, |
| duid->llt_time); |
| else |
| r = sd_dhcp_client_set_iaid_duid(link->dhcp_client, |
| link->network->iaid_set, |
| link->network->iaid, |
| duid->type, |
| duid->raw_data_len > 0 ? duid->raw_data : NULL, |
| duid->raw_data_len); |
| if (r < 0) |
| return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set IAID+DUID: %m"); |
| break; |
| } |
| case DHCP_CLIENT_ID_DUID_ONLY: { |
| /* If configured, apply user specified DUID */ |
| const DUID *duid = link_get_duid(link); |
| |
| if (duid->type == DUID_TYPE_LLT && duid->raw_data_len == 0) |
| r = sd_dhcp_client_set_duid_llt(link->dhcp_client, |
| duid->llt_time); |
| else |
| r = sd_dhcp_client_set_duid(link->dhcp_client, |
| duid->type, |
| duid->raw_data_len > 0 ? duid->raw_data : NULL, |
| duid->raw_data_len); |
| if (r < 0) |
| return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set DUID: %m"); |
| break; |
| } |
| case DHCP_CLIENT_ID_MAC: |
| r = sd_dhcp_client_set_client_id(link->dhcp_client, |
| ARPHRD_ETHER, |
| (const uint8_t *) &link->mac, |
| sizeof(link->mac)); |
| if (r < 0) |
| return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set client ID: %m"); |
| break; |
| default: |
| assert_not_reached("Unknown client identifier type."); |
| } |
| |
| return 0; |
| } |
| |
| int dhcp4_configure(Link *link) { |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| assert(link->network->dhcp & ADDRESS_FAMILY_IPV4); |
| |
| if (!link->dhcp_client) { |
| r = sd_dhcp_client_new(&link->dhcp_client, link->network->dhcp_anonymize); |
| if (r == -ENOMEM) |
| return log_oom(); |
| if (r < 0) |
| return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to create DHCP4 client: %m"); |
| } |
| |
| r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0); |
| if (r < 0) |
| return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to attach event: %m"); |
| |
| r = sd_dhcp_client_set_mac(link->dhcp_client, |
| (const uint8_t *) &link->mac, |
| sizeof (link->mac), ARPHRD_ETHER); |
| if (r < 0) |
| return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set MAC address: %m"); |
| |
| r = sd_dhcp_client_set_ifindex(link->dhcp_client, link->ifindex); |
| if (r < 0) |
| return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set ifindex: %m"); |
| |
| r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp4_handler, link); |
| if (r < 0) |
| return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set callback: %m"); |
| |
| r = sd_dhcp_client_set_request_broadcast(link->dhcp_client, |
| link->network->dhcp_broadcast); |
| if (r < 0) |
| return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for broadcast: %m"); |
| |
| if (link->mtu) { |
| r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu); |
| if (r < 0) |
| return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set MTU: %m"); |
| } |
| |
| if (link->network->dhcp_use_mtu) { |
| r = sd_dhcp_client_set_request_option(link->dhcp_client, |
| SD_DHCP_OPTION_INTERFACE_MTU); |
| if (r < 0) |
| return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for MTU: %m"); |
| } |
| |
| /* NOTE: even if this variable is called "use", it also "sends" PRL |
| * options, maybe there should be a different configuration variable |
| * to send or not route options?. */ |
| /* NOTE: when using Anonymize=yes, routes PRL options are sent |
| * by default, so they don't need to be added here. */ |
| if (link->network->dhcp_use_routes && !link->network->dhcp_anonymize) { |
| r = sd_dhcp_client_set_request_option(link->dhcp_client, |
| SD_DHCP_OPTION_STATIC_ROUTE); |
| if (r < 0) |
| return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for static route: %m"); |
| |
| r = sd_dhcp_client_set_request_option(link->dhcp_client, |
| SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE); |
| if (r < 0) |
| return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for classless static route: %m"); |
| } |
| |
| if (link->network->dhcp_use_ntp) { |
| r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_NTP_SERVER); |
| if (r < 0) |
| return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for NTP server: %m"); |
| } |
| |
| if (link->network->dhcp_use_timezone) { |
| r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_NEW_TZDB_TIMEZONE); |
| if (r < 0) |
| return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for timezone: %m"); |
| } |
| |
| r = dhcp4_set_hostname(link); |
| if (r < 0) |
| return r; |
| |
| if (link->network->dhcp_vendor_class_identifier) { |
| r = sd_dhcp_client_set_vendor_class_identifier(link->dhcp_client, |
| link->network->dhcp_vendor_class_identifier); |
| if (r < 0) |
| return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set vendor class identifier: %m"); |
| } |
| |
| if (link->network->dhcp_user_class) { |
| r = sd_dhcp_client_set_user_class(link->dhcp_client, (const char **) link->network->dhcp_user_class); |
| if (r < 0) |
| return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set user class: %m"); |
| } |
| |
| if (link->network->dhcp_client_port) { |
| r = sd_dhcp_client_set_client_port(link->dhcp_client, link->network->dhcp_client_port); |
| if (r < 0) |
| return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set listen port: %m"); |
| } |
| |
| return dhcp4_set_client_identifier(link); |
| } |