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https://gitlab.freedesktop.org/NetworkManager/NetworkManager.git
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libnm-core: add function to detect directly-unreachable gateways
nm_connection_get_unreachable_gateways() is a non-public function, available in the daemon and clients, which detects gateways in the static configuration that are not directly reachable.
This commit is contained in:
Beniamino Galvani
parent
128b49fe21
commit
73d0d2cbb5
3 changed files with 484 additions and 0 deletions
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@ -1149,3 +1149,160 @@ nm_setting_ovs_other_config_check_val(const char *val, GError **error)
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return TRUE;
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}
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/*****************************************************************************/
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typedef struct {
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NMIPAddr dest;
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guint prefix;
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} DirectRoute;
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static void
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_setting_ip_config_collect_unreachable_gateways(NMSettingIPConfig *s_ip, GHashTable **result)
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{
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const int addr_family = nm_setting_ip_config_get_addr_family(s_ip);
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guint num_routes;
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guint num_addrs;
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guint n_direct_routes = 0;
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NMIPAddr gw_bin = NM_IP_ADDR_INIT;
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guint i;
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guint j;
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const char *gateway;
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gs_free DirectRoute *direct_routes = NULL;
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num_routes = nm_setting_ip_config_get_num_routes(s_ip);
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num_addrs = nm_setting_ip_config_get_num_addresses(s_ip);
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direct_routes = g_new0(DirectRoute, num_routes + num_addrs);
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/* Collect direct routes (routes without a gateway) from the setting. */
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for (i = 0; i < num_routes; i++) {
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NMIPRoute *route = nm_setting_ip_config_get_route(s_ip, i);
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if (nm_ip_route_get_next_hop(route))
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continue;
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nm_ip_route_get_dest_binary(route, &direct_routes[n_direct_routes].dest);
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direct_routes[n_direct_routes].prefix = nm_ip_route_get_prefix(route);
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n_direct_routes++;
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}
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/* Add prefix routes (device routes) for each static address. */
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for (i = 0; i < num_addrs; i++) {
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NMIPAddress *addr = nm_setting_ip_config_get_address(s_ip, i);
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nm_ip_address_get_address_binary(addr, &direct_routes[n_direct_routes].dest);
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direct_routes[n_direct_routes].prefix = nm_ip_address_get_prefix(addr);
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n_direct_routes++;
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}
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/* Check the setting's default gateway. */
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gateway = nm_setting_ip_config_get_gateway(s_ip);
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if (gateway && nm_inet_parse_bin(addr_family, gateway, NULL, &gw_bin)) {
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gboolean reachable = FALSE;
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if (addr_family == AF_INET6 && IN6_IS_ADDR_LINKLOCAL(&gw_bin.addr6))
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reachable = TRUE;
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if (!reachable) {
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for (j = 0; j < n_direct_routes; j++) {
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if (nm_ip_addr_same_prefix(addr_family,
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&gw_bin,
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&direct_routes[j].dest,
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direct_routes[j].prefix)) {
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reachable = TRUE;
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break;
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}
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}
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}
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if (!reachable) {
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if (!*result)
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*result = g_hash_table_new(nm_str_hash, g_str_equal);
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g_hash_table_add(*result, (gpointer) gateway);
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}
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}
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/* Check gateways of each route in the setting. */
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for (i = 0; i < num_routes; i++) {
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NMIPRoute *route = nm_setting_ip_config_get_route(s_ip, i);
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NMIPAddr next_hop = NM_IP_ADDR_INIT;
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gboolean reachable = FALSE;
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GVariant *attribute;
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if (!nm_ip_route_get_next_hop_binary(route, &next_hop))
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continue;
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if (addr_family == AF_INET6 && IN6_IS_ADDR_LINKLOCAL(&next_hop.addr6))
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continue;
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attribute = nm_ip_route_get_attribute(route, NM_IP_ROUTE_ATTRIBUTE_ONLINK);
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if (attribute && g_variant_is_of_type(attribute, G_VARIANT_TYPE("b"))
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&& g_variant_get_boolean(attribute)) {
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/* the gateway of a onlink route is reachable */
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continue;
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}
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for (j = 0; j < n_direct_routes; j++) {
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if (nm_ip_addr_same_prefix(addr_family,
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&next_hop,
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&direct_routes[j].dest,
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direct_routes[j].prefix)) {
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reachable = TRUE;
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break;
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}
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}
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if (!reachable) {
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if (!*result)
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*result = g_hash_table_new(nm_str_hash, g_str_equal);
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g_hash_table_add(*result, (gpointer) nm_ip_route_get_next_hop(route));
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}
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}
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}
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/**
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* nm_connection_get_unreachable_gateways:
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* @connection: the #NMConnection
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*
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* Checks whether there are gateways (either the default gateway or gateways
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* of routes) that are not directly reachable in the IPv4 and IPv6 settings
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* of the connection. A gateway is considered directly reachable if it falls
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* within the subnet of a direct route (a route without a next hop) or of a
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* prefix route from a static address.
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*
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* Returns: a %NULL-terminated array of gateway strings not directly reachable,
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* or %NULL if all gateways are reachable. The individual strings are owned
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* by the setting. Free the returned array with g_free().
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*/
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const char **
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nm_connection_get_unreachable_gateways(NMConnection *connection)
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{
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gs_unref_hashtable GHashTable *result = NULL;
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NMSettingIPConfig *s_ip;
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guint len;
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const char **strv;
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if (!connection)
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return NULL;
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s_ip = nm_connection_get_setting_ip4_config(connection);
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if (s_ip
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&& nm_streq0(nm_setting_ip_config_get_method(s_ip), NM_SETTING_IP4_CONFIG_METHOD_MANUAL)) {
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_setting_ip_config_collect_unreachable_gateways(s_ip, &result);
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}
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s_ip = nm_connection_get_setting_ip6_config(connection);
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if (s_ip
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&& nm_streq0(nm_setting_ip_config_get_method(s_ip), NM_SETTING_IP6_CONFIG_METHOD_MANUAL)) {
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_setting_ip_config_collect_unreachable_gateways(s_ip, &result);
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}
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if (result) {
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strv = (const char **) g_hash_table_get_keys_as_array(result, &len);
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nm_strv_sort(strv, len);
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return strv;
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}
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return NULL;
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}
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@ -344,6 +344,10 @@ gboolean nm_setting_ovs_other_config_check_val(const char *val, GError **error);
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/*****************************************************************************/
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const char **nm_connection_get_unreachable_gateways(NMConnection *connection);
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/*****************************************************************************/
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/* Wi-Fi frequencies range for each band */
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#define _NM_WIFI_FREQ_MIN_2GHZ 2412
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#define _NM_WIFI_FREQ_MAX_2GHZ 2484
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@ -11613,6 +11613,328 @@ test_dhcp_iaid_hexstr(void)
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/*****************************************************************************/
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static void
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test_unreachable_gateways(void)
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{
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NMConnection *conn;
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NMSettingIPConfig *s_ip4;
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NMSettingIPConfig *s_ip6;
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gs_free const char **result = NULL;
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/* IPv4 gateway reachable via address prefix route */
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{
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conn =
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nmtst_create_minimal_connection("test-ugw", NULL, NM_SETTING_WIRED_SETTING_NAME, NULL);
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s_ip4 = (NMSettingIPConfig *) nm_setting_ip4_config_new();
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g_object_set(s_ip4,
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NM_SETTING_IP_CONFIG_METHOD,
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NM_SETTING_IP4_CONFIG_METHOD_MANUAL,
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NM_SETTING_IP_CONFIG_GATEWAY,
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"192.168.1.1",
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NULL);
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nmtst_setting_ip_config_add_address(s_ip4, "192.168.1.5", 24);
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nm_connection_add_setting(conn, NM_SETTING(s_ip4));
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result = nm_connection_get_unreachable_gateways(conn);
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g_assert(!result);
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g_object_unref(conn);
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}
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/* IPv4 gateway NOT reachable */
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{
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conn =
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nmtst_create_minimal_connection("test-ugw", NULL, NM_SETTING_WIRED_SETTING_NAME, NULL);
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s_ip4 = (NMSettingIPConfig *) nm_setting_ip4_config_new();
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g_object_set(s_ip4,
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NM_SETTING_IP_CONFIG_METHOD,
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NM_SETTING_IP4_CONFIG_METHOD_MANUAL,
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NM_SETTING_IP_CONFIG_GATEWAY,
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"10.0.0.1",
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NULL);
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nmtst_setting_ip_config_add_address(s_ip4, "192.168.1.5", 24);
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nmtst_setting_ip_config_add_address(s_ip4, "172.16.1.1", 16);
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nm_connection_add_setting(conn, NM_SETTING(s_ip4));
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result = nm_connection_get_unreachable_gateways(conn);
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g_assert(result);
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g_assert_cmpint(g_strv_length((char **) result), ==, 1);
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g_assert_cmpstr(result[0], ==, "10.0.0.1");
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nm_clear_g_free(&result);
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g_object_unref(conn);
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}
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/* IPv4 gateway NOT reachable. It's ignored because of method "auto" */
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{
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conn =
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nmtst_create_minimal_connection("test-ugw", NULL, NM_SETTING_WIRED_SETTING_NAME, NULL);
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s_ip4 = (NMSettingIPConfig *) nm_setting_ip4_config_new();
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g_object_set(s_ip4,
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NM_SETTING_IP_CONFIG_METHOD,
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NM_SETTING_IP4_CONFIG_METHOD_AUTO,
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NM_SETTING_IP_CONFIG_GATEWAY,
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"10.0.0.1",
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NULL);
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nmtst_setting_ip_config_add_address(s_ip4, "192.168.1.5", 24);
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nmtst_setting_ip_config_add_address(s_ip4, "172.16.1.1", 16);
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nm_connection_add_setting(conn, NM_SETTING(s_ip4));
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result = nm_connection_get_unreachable_gateways(conn);
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g_assert(!result);
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g_object_unref(conn);
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}
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/* Route gateway reachable via address prefix route */
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{
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conn =
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nmtst_create_minimal_connection("test-ugw", NULL, NM_SETTING_WIRED_SETTING_NAME, NULL);
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s_ip4 = (NMSettingIPConfig *) nm_setting_ip4_config_new();
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g_object_set(s_ip4, NM_SETTING_IP_CONFIG_METHOD, NM_SETTING_IP4_CONFIG_METHOD_MANUAL, NULL);
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nmtst_setting_ip_config_add_address(s_ip4, "192.168.1.5", 24);
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nmtst_setting_ip_config_add_route(s_ip4, "10.0.0.0", 8, "192.168.1.254", 100);
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nm_connection_add_setting(conn, NM_SETTING(s_ip4));
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result = nm_connection_get_unreachable_gateways(conn);
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g_assert(!result);
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g_object_unref(conn);
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}
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/* Route gateway NOT reachable, check sorting */
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{
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conn =
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nmtst_create_minimal_connection("test-ugw", NULL, NM_SETTING_WIRED_SETTING_NAME, NULL);
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s_ip4 = (NMSettingIPConfig *) nm_setting_ip4_config_new();
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g_object_set(s_ip4, NM_SETTING_IP_CONFIG_METHOD, NM_SETTING_IP4_CONFIG_METHOD_MANUAL, NULL);
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nmtst_setting_ip_config_add_address(s_ip4, "192.168.1.5", 24);
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nmtst_setting_ip_config_add_route(s_ip4, "10.0.0.0", 16, "172.16.0.2", 100);
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nmtst_setting_ip_config_add_route(s_ip4, "10.1.0.0", 16, "172.16.0.4", 100);
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nmtst_setting_ip_config_add_route(s_ip4, "10.2.0.0", 16, "172.16.0.3", 100);
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nmtst_setting_ip_config_add_route(s_ip4, "10.3.0.0", 16, "172.16.0.1", 100);
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nm_connection_add_setting(conn, NM_SETTING(s_ip4));
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result = nm_connection_get_unreachable_gateways(conn);
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g_assert(result);
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g_assert_cmpint(g_strv_length((char **) result), ==, 4);
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g_assert_cmpstr(result[0], ==, "172.16.0.1");
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g_assert_cmpstr(result[1], ==, "172.16.0.2");
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g_assert_cmpstr(result[2], ==, "172.16.0.3");
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g_assert_cmpstr(result[3], ==, "172.16.0.4");
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nm_clear_g_free(&result);
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g_object_unref(conn);
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}
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/* Route gateway reachable via a direct route in the setting */
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{
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conn =
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nmtst_create_minimal_connection("test-ugw", NULL, NM_SETTING_WIRED_SETTING_NAME, NULL);
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s_ip4 = (NMSettingIPConfig *) nm_setting_ip4_config_new();
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g_object_set(s_ip4, NM_SETTING_IP_CONFIG_METHOD, NM_SETTING_IP4_CONFIG_METHOD_MANUAL, NULL);
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nmtst_setting_ip_config_add_address(s_ip4, "192.168.1.5", 24);
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nmtst_setting_ip_config_add_route(s_ip4, "172.16.0.0", 16, NULL, 100);
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nmtst_setting_ip_config_add_route(s_ip4, "10.0.0.0", 8, "172.16.0.1", 100);
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nm_connection_add_setting(conn, NM_SETTING(s_ip4));
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result = nm_connection_get_unreachable_gateways(conn);
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g_assert(!result);
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g_object_unref(conn);
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}
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/* No gateways */
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{
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conn =
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nmtst_create_minimal_connection("test-ugw", NULL, NM_SETTING_WIRED_SETTING_NAME, NULL);
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s_ip4 = (NMSettingIPConfig *) nm_setting_ip4_config_new();
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g_object_set(s_ip4, NM_SETTING_IP_CONFIG_METHOD, NM_SETTING_IP4_CONFIG_METHOD_MANUAL, NULL);
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nmtst_setting_ip_config_add_address(s_ip4, "192.168.1.5", 24);
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nm_connection_add_setting(conn, NM_SETTING(s_ip4));
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result = nm_connection_get_unreachable_gateways(conn);
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g_assert(!result);
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g_object_unref(conn);
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}
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/* Both default gateway and route gateway unreachable */
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{
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conn =
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nmtst_create_minimal_connection("test-ugw", NULL, NM_SETTING_WIRED_SETTING_NAME, NULL);
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s_ip4 = (NMSettingIPConfig *) nm_setting_ip4_config_new();
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g_object_set(s_ip4,
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NM_SETTING_IP_CONFIG_METHOD,
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NM_SETTING_IP4_CONFIG_METHOD_MANUAL,
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NM_SETTING_IP_CONFIG_GATEWAY,
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"10.0.0.1",
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NULL);
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nmtst_setting_ip_config_add_address(s_ip4, "192.168.1.5", 24);
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nmtst_setting_ip_config_add_route(s_ip4, "10.0.0.0", 8, "172.16.0.1", 100);
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nm_connection_add_setting(conn, NM_SETTING(s_ip4));
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result = nm_connection_get_unreachable_gateways(conn);
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g_assert(result);
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g_assert_cmpint(g_strv_length((char **) result), ==, 2);
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g_assert_cmpstr(result[0], ==, "10.0.0.1");
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g_assert_cmpstr(result[1], ==, "172.16.0.1");
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nm_clear_g_free(&result);
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g_object_unref(conn);
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}
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/* Test deduplication */
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{
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conn =
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nmtst_create_minimal_connection("test-ugw", NULL, NM_SETTING_WIRED_SETTING_NAME, NULL);
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s_ip4 = (NMSettingIPConfig *) nm_setting_ip4_config_new();
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g_object_set(s_ip4,
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NM_SETTING_IP_CONFIG_METHOD,
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NM_SETTING_IP4_CONFIG_METHOD_MANUAL,
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NM_SETTING_IP_CONFIG_GATEWAY,
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"192.168.1.1",
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NULL);
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nmtst_setting_ip_config_add_address(s_ip4, "192.168.1.5", 24);
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nmtst_setting_ip_config_add_route(s_ip4, "10.0.0.0", 16, "172.16.0.1", 100);
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nmtst_setting_ip_config_add_route(s_ip4, "10.1.0.0", 16, "172.16.0.1", 100);
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nmtst_setting_ip_config_add_route(s_ip4, "10.2.0.0", 16, "172.16.0.1", 100);
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nm_connection_add_setting(conn, NM_SETTING(s_ip4));
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result = nm_connection_get_unreachable_gateways(conn);
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g_assert(result);
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g_assert_cmpint(g_strv_length((char **) result), ==, 1);
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g_assert_cmpstr(result[0], ==, "172.16.0.1");
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nm_clear_g_free(&result);
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g_object_unref(conn);
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}
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/* IPv6 gateway reachable via address prefix route */
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{
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conn =
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nmtst_create_minimal_connection("test-ugw", NULL, NM_SETTING_WIRED_SETTING_NAME, NULL);
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s_ip6 = (NMSettingIPConfig *) nm_setting_ip6_config_new();
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g_object_set(s_ip6,
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NM_SETTING_IP_CONFIG_METHOD,
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NM_SETTING_IP6_CONFIG_METHOD_MANUAL,
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NM_SETTING_IP_CONFIG_GATEWAY,
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"fd01::1",
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NULL);
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nmtst_setting_ip_config_add_address(s_ip6, "fd01::10", 64);
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nm_connection_add_setting(conn, NM_SETTING(s_ip6));
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result = nm_connection_get_unreachable_gateways(conn);
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g_assert(!result);
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g_object_unref(conn);
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}
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/* IPv6 gateway NOT reachable */
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{
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conn =
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nmtst_create_minimal_connection("test-ugw", NULL, NM_SETTING_WIRED_SETTING_NAME, NULL);
|
||||
s_ip6 = (NMSettingIPConfig *) nm_setting_ip6_config_new();
|
||||
g_object_set(s_ip6,
|
||||
NM_SETTING_IP_CONFIG_METHOD,
|
||||
NM_SETTING_IP6_CONFIG_METHOD_MANUAL,
|
||||
NM_SETTING_IP_CONFIG_GATEWAY,
|
||||
"fd02::1",
|
||||
NULL);
|
||||
nmtst_setting_ip_config_add_address(s_ip6, "fd01::10", 64);
|
||||
nm_connection_add_setting(conn, NM_SETTING(s_ip6));
|
||||
|
||||
result = nm_connection_get_unreachable_gateways(conn);
|
||||
g_assert(result);
|
||||
g_assert_cmpint(g_strv_length((char **) result), ==, 1);
|
||||
g_assert_cmpstr(result[0], ==, "fd02::1");
|
||||
nm_clear_g_free(&result);
|
||||
g_object_unref(conn);
|
||||
}
|
||||
|
||||
/* Multiple addresses, gateway reachable via second address */
|
||||
{
|
||||
conn =
|
||||
nmtst_create_minimal_connection("test-ugw", NULL, NM_SETTING_WIRED_SETTING_NAME, NULL);
|
||||
s_ip4 = (NMSettingIPConfig *) nm_setting_ip4_config_new();
|
||||
g_object_set(s_ip4,
|
||||
NM_SETTING_IP_CONFIG_METHOD,
|
||||
NM_SETTING_IP4_CONFIG_METHOD_MANUAL,
|
||||
NM_SETTING_IP_CONFIG_GATEWAY,
|
||||
"10.0.0.1",
|
||||
NULL);
|
||||
nmtst_setting_ip_config_add_address(s_ip4, "192.168.1.5", 24);
|
||||
nmtst_setting_ip_config_add_address(s_ip4, "10.0.0.5", 24);
|
||||
nm_connection_add_setting(conn, NM_SETTING(s_ip4));
|
||||
|
||||
result = nm_connection_get_unreachable_gateways(conn);
|
||||
g_assert(!result);
|
||||
g_object_unref(conn);
|
||||
}
|
||||
|
||||
/* Unreachable gateways in both IPv4 and IPv6 */
|
||||
{
|
||||
conn =
|
||||
nmtst_create_minimal_connection("test-ugw", NULL, NM_SETTING_WIRED_SETTING_NAME, NULL);
|
||||
s_ip4 = (NMSettingIPConfig *) nm_setting_ip4_config_new();
|
||||
g_object_set(s_ip4,
|
||||
NM_SETTING_IP_CONFIG_METHOD,
|
||||
NM_SETTING_IP4_CONFIG_METHOD_MANUAL,
|
||||
NM_SETTING_IP_CONFIG_GATEWAY,
|
||||
"10.0.0.1",
|
||||
NULL);
|
||||
nmtst_setting_ip_config_add_address(s_ip4, "192.168.1.5", 24);
|
||||
nm_connection_add_setting(conn, NM_SETTING(s_ip4));
|
||||
|
||||
s_ip6 = (NMSettingIPConfig *) nm_setting_ip6_config_new();
|
||||
g_object_set(s_ip6,
|
||||
NM_SETTING_IP_CONFIG_METHOD,
|
||||
NM_SETTING_IP6_CONFIG_METHOD_MANUAL,
|
||||
NM_SETTING_IP_CONFIG_GATEWAY,
|
||||
"fd02::1",
|
||||
NULL);
|
||||
nmtst_setting_ip_config_add_address(s_ip6, "fd01::10", 64);
|
||||
nm_connection_add_setting(conn, NM_SETTING(s_ip6));
|
||||
|
||||
result = nm_connection_get_unreachable_gateways(conn);
|
||||
g_assert(result);
|
||||
g_assert_cmpint(g_strv_length((char **) result), ==, 2);
|
||||
g_assert_cmpstr(result[0], ==, "10.0.0.1");
|
||||
g_assert_cmpstr(result[1], ==, "fd02::1");
|
||||
nm_clear_g_free(&result);
|
||||
g_object_unref(conn);
|
||||
}
|
||||
|
||||
/* Onlink and IPv6-link-local routes */
|
||||
{
|
||||
NMIPRoute *route;
|
||||
|
||||
conn =
|
||||
nmtst_create_minimal_connection("test-ugw", NULL, NM_SETTING_WIRED_SETTING_NAME, NULL);
|
||||
|
||||
s_ip4 = (NMSettingIPConfig *) nm_setting_ip4_config_new();
|
||||
g_object_set(s_ip4, NM_SETTING_IP_CONFIG_METHOD, NM_SETTING_IP4_CONFIG_METHOD_MANUAL, NULL);
|
||||
nmtst_setting_ip_config_add_address(s_ip4, "192.168.1.5", 24);
|
||||
|
||||
route = nm_ip_route_new(AF_INET, "10.0.0.1", 8, "192.168.20.1", 100, NULL);
|
||||
g_assert(route);
|
||||
nm_ip_route_set_attribute(route, NM_IP_ROUTE_ATTRIBUTE_ONLINK, g_variant_new_boolean(TRUE));
|
||||
g_assert(nm_setting_ip_config_add_route(s_ip4, route));
|
||||
nm_ip_route_unref(route);
|
||||
|
||||
nm_connection_add_setting(conn, NM_SETTING(s_ip4));
|
||||
|
||||
s_ip6 = (NMSettingIPConfig *) nm_setting_ip6_config_new();
|
||||
g_object_set(s_ip6, NM_SETTING_IP_CONFIG_METHOD, NM_SETTING_IP6_CONFIG_METHOD_MANUAL, NULL);
|
||||
nmtst_setting_ip_config_add_address(s_ip6, "fd01::10", 64);
|
||||
nm_connection_add_setting(conn, NM_SETTING(s_ip6));
|
||||
|
||||
route = nm_ip_route_new(AF_INET6, "fd02::", 64, "fd03::1111", 100, NULL);
|
||||
g_assert(route);
|
||||
nm_ip_route_set_attribute(route, NM_IP_ROUTE_ATTRIBUTE_ONLINK, g_variant_new_boolean(TRUE));
|
||||
g_assert(nm_setting_ip_config_add_route(s_ip6, route));
|
||||
nm_ip_route_unref(route);
|
||||
|
||||
nmtst_setting_ip_config_add_route(s_ip6, "fd04::", 64, "fe80::1111", 100);
|
||||
|
||||
result = nm_connection_get_unreachable_gateways(conn);
|
||||
g_assert(!result);
|
||||
g_object_unref(conn);
|
||||
}
|
||||
}
|
||||
|
||||
/*****************************************************************************/
|
||||
|
||||
NMTST_DEFINE();
|
||||
|
||||
int
|
||||
|
|
@ -11963,6 +12285,7 @@ main(int argc, char **argv)
|
|||
g_test_add_func("/core/general/test_dns_uri_get_legacy", test_dns_uri_parse_plain);
|
||||
g_test_add_func("/core/general/test_dns_uri_normalize", test_dns_uri_normalize);
|
||||
g_test_add_func("/core/general/test_dhcp_iaid_hexstr", test_dhcp_iaid_hexstr);
|
||||
g_test_add_func("/core/general/test_unreachable_gateways", test_unreachable_gateways);
|
||||
|
||||
return g_test_run();
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue