+static clib_error_t *
+add_identity_mapping_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ clib_error_t * error = 0;
+ ip4_address_t addr;
+ u32 port = 0, vrf_id = ~0;
+ int is_add = 1;
+ int addr_only = 1;
+ u32 sw_if_index = ~0;
+ vnet_main_t * vnm = vnet_get_main();
+ int rv;
+ snat_protocol_t proto;
+
+ addr.as_u32 = 0;
+
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "%U", unformat_ip4_address, &addr))
+ ;
+ else if (unformat (line_input, "external %U",
+ unformat_vnet_sw_interface, vnm, &sw_if_index))
+ ;
+ else if (unformat (line_input, "vrf %u", &vrf_id))
+ ;
+ else if (unformat (line_input, "%U %u", unformat_snat_protocol, &proto,
+ &port))
+ addr_only = 0;
+ else if (unformat (line_input, "del"))
+ is_add = 0;
+ else
+ {
+ error = clib_error_return (0, "unknown input: '%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+ }
+
+ rv = snat_add_static_mapping(addr, addr, (u16) port, (u16) port,
+ vrf_id, addr_only, sw_if_index, proto, is_add);
+
+ switch (rv)
+ {
+ case VNET_API_ERROR_INVALID_VALUE:
+ error = clib_error_return (0, "External port already in use.");
+ goto done;
+ case VNET_API_ERROR_NO_SUCH_ENTRY:
+ if (is_add)
+ error = clib_error_return (0, "External addres must be allocated.");
+ else
+ error = clib_error_return (0, "Mapping not exist.");
+ goto done;
+ case VNET_API_ERROR_NO_SUCH_FIB:
+ error = clib_error_return (0, "No such VRF id.");
+ goto done;
+ case VNET_API_ERROR_VALUE_EXIST:
+ error = clib_error_return (0, "Mapping already exist.");
+ goto done;
+ default:
+ break;
+ }
+
+done:
+ unformat_free (line_input);
+
+ return error;
+}
+
+/*?
+ * @cliexpar
+ * @cliexstart{snat add identity mapping}
+ * Identity mapping translate an IP address to itself.
+ * To create identity mapping for address 10.0.0.3 port 6303 for TCP protocol
+ * use:
+ * vpp# nat44 add identity mapping 10.0.0.3 tcp 6303
+ * To create identity mapping for address 10.0.0.3 use:
+ * vpp# nat44 add identity mapping 10.0.0.3
+ * To create identity mapping for DHCP addressed interface use:
+ * vpp# nat44 add identity mapping GigabitEthernet0/a/0 tcp 3606
+ * @cliexend
+?*/
+VLIB_CLI_COMMAND (add_identity_mapping_command, static) = {
+ .path = "nat44 add identity mapping",
+ .function = add_identity_mapping_command_fn,
+ .short_help = "nat44 add identity mapping <interface>|<ip4-addr> "
+ "[<protocol> <port>] [vrf <table-id>] [del]",
+};
+