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-rw-r--r--src/vnet/udp/udp_decap.c106
1 files changed, 106 insertions, 0 deletions
diff --git a/src/vnet/udp/udp_decap.c b/src/vnet/udp/udp_decap.c
new file mode 100644
index 00000000000..7337ac17ee9
--- /dev/null
+++ b/src/vnet/udp/udp_decap.c
@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 2021 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vnet/udp/udp.h>
+
+uword
+unformat_next_node (unformat_input_t *input, va_list *args)
+{
+ vlib_main_t *vm = va_arg (*args, vlib_main_t *);
+ u32 *node_index = va_arg (*args, u32 *);
+ if (unformat (input, "mpls"))
+ *node_index = vlib_get_node_by_name (vm, (u8 *) "mpls-input")->index;
+ else if (unformat (input, "ip4"))
+ *node_index = vlib_get_node_by_name (vm, (u8 *) "ip4-input")->index;
+ else if (unformat (input, "ip6"))
+ *node_index = vlib_get_node_by_name (vm, (u8 *) "ip6-input")->index;
+ else
+ return 0;
+ return 1;
+}
+
+static clib_error_t *
+udp_decap_cli (vlib_main_t *vm, unformat_input_t *input,
+ vlib_cli_command_t *cmd_arg)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ clib_error_t *error = NULL;
+ u8 is_add = 1, is_ip4 = 1;
+ int i = 0;
+ u16 port = 0;
+ u32 node_index = ~0;
+
+ 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, "add"))
+ is_add = 1;
+ else if (unformat (line_input, "del"))
+ is_add = 0;
+ else if (unformat (line_input, "ipv4"))
+ is_ip4 = 1;
+ else if (unformat (line_input, "ipv6"))
+ is_ip4 = 0;
+ else if (unformat (line_input, "%d", &i))
+ port = i;
+ else if (unformat (line_input, "next-proto %U", unformat_next_node, vm,
+ &node_index))
+ ;
+ else
+ {
+ error = clib_error_return (0, "parse error: '%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+ }
+ if (port == 0)
+ {
+ error = clib_error_return (0, "missing port");
+ goto done;
+ }
+ if (is_add && node_index == ~0)
+ {
+ error = clib_error_return (0, "missing protocol");
+ goto done;
+ }
+ if (is_add)
+ udp_register_dst_port (vm, port, node_index, is_ip4);
+ else
+ udp_unregister_dst_port (vm, port, is_ip4);
+
+done:
+ unformat_free (line_input);
+ return error;
+}
+
+/*?
+ * Register a port to decapsulate incoming UDP encapsulated packets.
+ *
+ * @cliexpar
+ * @clistart
+ * udp decap add ipv4 1234 next-proto mpls
+ * @cliend
+ * @cliexcmd{udp decap [add|del] [ipv4|ipv6] <dst-port> next-proto
+<inner-protocol>}
+?*/
+
+VLIB_CLI_COMMAND (udp_decap_add_command, static) = {
+ .path = "udp decap",
+ .short_help =
+ "udp decap [add|del] [ipv4|ipv6] <dst-port> next-proto <inner-protocol>",
+ .function = udp_decap_cli,
+}; \ No newline at end of file