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+/* Hey Emacs use -*- mode: C -*- */
+/*
+ * Copyright (c) 2016 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.
+ */
+
+option version = "1.0.0";
+import "vnet/interface_types.api";
+
+/** \brief TCP MSS Clamping direction flag
+ */
+enumflag mss_clamp_dir : u8 {
+ MSS_CLAMP_DIR_NONE = 0x0,
+ MSS_CLAMP_DIR_RX = 0x1,
+ MSS_CLAMP_DIR_TX = 0x2,
+};
+
+/** \brief Enable/Disable TCP MSS Clamping feature on an interface
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param sw_if_index - interface index on which clamping will be applied
+ @param ipv4_mss - Maximum Segment Size for IPv4/TCP
+ @param ipv6_mss - Maximum Segment Size for IPv6/TCP
+ @param ipv4_direction - Direction clamping is enabled on (IPv4/TCP)
+ @param ipv6_direction - Direction clamping is enabled on (IPv6/TCP)
+ */
+autoreply define mss_clamp_enable_disable {
+ u32 client_index;
+ u32 context;
+ vl_api_interface_index_t sw_if_index;
+ u16 ipv4_mss;
+ u16 ipv6_mss;
+ vl_api_mss_clamp_dir_t ipv4_direction;
+ vl_api_mss_clamp_dir_t ipv6_direction;
+};
+
+
+/** \brief Get the list of configured mss values
+ @param client_index - opaque cookie to identify the sender
+*/
+service {
+ rpc mss_clamp_get returns mss_clamp_get_reply
+ stream mss_clamp_details;
+};
+
+/** \brief Get the TCP MSS Clamping feature settings
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param cursor - cursor to continue when there is more to read
+ @param sw_if_index - interface index to filter the result,
+ ~0 means no filter
+ */
+define mss_clamp_get {
+ u32 client_index;
+ u32 context;
+ u32 cursor;
+ vl_api_interface_index_t sw_if_index;
+};
+
+/** \brief Reply for get TCP MSS Clamping feature settings request
+ @param context - returned sender context, to match reply w/ request
+ @param retval - return code
+ @param cursor - cursor to continue when there is more to read
+ */
+define mss_clamp_get_reply {
+ u32 context;
+ i32 retval;
+ u32 cursor;
+};
+
+/** \brief Configured MSS values on an interface
+ @param context - returned sender context, to match reply w/ request
+ @param sw_if_index - interface index on which clamping is applied
+ @param ipv4_mss - Maximum Segment Size for IPv4/TCP
+ @param ipv6_mss - Maximum Segment Size for IPv6/TCP
+ @param ipv4_direction - Direction clamping is enabled on (IPv4/TCP)
+ @param ipv6_direction - Direction clamping is enabled on (IPv6/TCP)
+ */
+define mss_clamp_details {
+ u32 context;
+ vl_api_interface_index_t sw_if_index;
+ u16 ipv4_mss;
+ u16 ipv6_mss;
+ vl_api_mss_clamp_dir_t ipv4_direction;
+ vl_api_mss_clamp_dir_t ipv6_direction;
+};
+
+counters mss_clamp {
+ clamped {
+ severity info;
+ type counter64;
+ units "packets";
+ description "packets clamped";
+ };
+};
+paths {
+ "/err/tcp-mss-clamping-ip4-in" "mss-clamp";
+ "/err/tcp-mss-clamping-ip4-out" "mss-clamp";
+ "/err/tcp-mss-clamping-ip6-in" "mss-clamp";
+ "/err/tcp-mss-clamping-ip6-out" "mss-clamp";
+};
+