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authorNeale Ranns <neale.ranns@cisco.com>2018-10-04 06:40:30 -0700
committerDamjan Marion <dmarion@me.com>2021-03-05 10:55:26 +0000
commitbf55e9931ce203049385fbf55dde291ead556679 (patch)
tree44ddb0b8a74f14971cdd95eca75f8fac6263d4b4 /src/plugins/mss_clamp/mss_clamp_api.c
parentab9f57355f43976930ef52e6091ef80412b065a0 (diff)
mss_clamp: TCP MSS clamping plugin
Type: feature Configure TCP MSS clamping on an interface as follows: set interface tcp-mss-clamp [rx|tx] <interface-name> ip4 [enable|disable|rx|tx] ip4-mss <size> ip6 [enable|disable|rx|tx] ip6-mss <size> Change-Id: I45b04e50a0b70a33e14a9066f981c651292ebffb Signed-off-by: Neale Ranns <neale.ranns@cisco.com> Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com> Signed-off-by: Miklos Tirpak <miklos.tirpak@gmail.com> Signed-off-by: Matthew Smith <mgsmith@netgate.com>
Diffstat (limited to 'src/plugins/mss_clamp/mss_clamp_api.c')
-rw-r--r--src/plugins/mss_clamp/mss_clamp_api.c136
1 files changed, 136 insertions, 0 deletions
diff --git a/src/plugins/mss_clamp/mss_clamp_api.c b/src/plugins/mss_clamp/mss_clamp_api.c
new file mode 100644
index 00000000000..cb47cd6ce06
--- /dev/null
+++ b/src/plugins/mss_clamp/mss_clamp_api.c
@@ -0,0 +1,136 @@
+/*
+ * mss_clamp_api.c - TCP MSS clamping plug-in
+ *
+ * Copyright (c) <current-year> <your-organization>
+ * 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/vnet.h>
+#include <vnet/plugin/plugin.h> /* VLIB_PLUGIN_REGISTER */
+#include <mss_clamp/mss_clamp.h>
+#include <mss_clamp/mss_clamp.api_enum.h>
+#include <mss_clamp/mss_clamp.api_types.h>
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+#include <vpp/app/version.h> /* VPP_BUILD_VER */
+
+#define REPLY_MSG_ID_BASE cm->msg_id_base
+#include <vlibapi/api_helper_macros.h>
+
+/* API message handler */
+static void
+vl_api_mss_clamp_enable_disable_t_handler (
+ vl_api_mss_clamp_enable_disable_t *mp)
+{
+ mssc_main_t *cm = &mssc_main;
+ vl_api_mss_clamp_enable_disable_reply_t *rmp;
+ int rv;
+
+ VALIDATE_SW_IF_INDEX (mp);
+
+ rv = mssc_enable_disable (ntohl (mp->sw_if_index), mp->ipv4_direction,
+ mp->ipv6_direction, ntohs (mp->ipv4_mss),
+ ntohs (mp->ipv6_mss));
+
+ BAD_SW_IF_INDEX_LABEL;
+ REPLY_MACRO (VL_API_MSS_CLAMP_ENABLE_DISABLE_REPLY);
+}
+
+static void
+send_mss_clamp_details (u32 sw_if_index, vl_api_registration_t *rp,
+ u32 context)
+{
+ mssc_main_t *cm = &mssc_main;
+ vl_api_mss_clamp_details_t *rmp;
+ u16 mss4, mss6;
+ u8 dir4, dir6;
+ int rv;
+
+ mss4 = mss6 = 0;
+ dir4 = dir6 = MSS_CLAMP_DIR_NONE;
+ rv = mssc_get_mss (sw_if_index, &dir4, &dir6, &mss4, &mss6);
+ if (rv == VNET_API_ERROR_FEATURE_DISABLED)
+ return;
+
+ REPLY_MACRO_DETAILS4 (VL_API_MSS_CLAMP_DETAILS, rp, context, ({
+ rmp->sw_if_index = htonl (sw_if_index);
+ rmp->ipv4_mss = htons (mss4);
+ rmp->ipv6_mss = htons (mss6);
+ rmp->ipv4_direction = dir4;
+ rmp->ipv6_direction = dir6;
+ }));
+}
+
+static void
+vl_api_mss_clamp_get_t_handler (vl_api_mss_clamp_get_t *mp)
+{
+ mssc_main_t *cm = &mssc_main;
+ vl_api_mss_clamp_get_reply_t *rmp;
+ int rv = 0;
+ u32 sw_if_index = ntohl (mp->sw_if_index);
+ vl_api_registration_t *reg;
+
+ reg = vl_api_client_index_to_registration (mp->client_index);
+ if (!reg)
+ return;
+
+ if (sw_if_index == ~0)
+ {
+ if (vec_len (cm->dir_enabled4) == 0)
+ {
+ REPLY_MACRO2 (VL_API_MSS_CLAMP_GET_REPLY, ({ rmp->cursor = ~0; }));
+ return;
+ }
+
+ REPLY_AND_DETAILS_MACRO (
+ VL_API_MSS_CLAMP_GET_REPLY, cm->dir_enabled4,
+ ({ send_mss_clamp_details (cursor, reg, mp->context); }));
+ }
+ else
+ {
+ VALIDATE_SW_IF_INDEX (mp);
+ send_mss_clamp_details (sw_if_index, reg, mp->context);
+
+ BAD_SW_IF_INDEX_LABEL;
+ REPLY_MACRO2 (VL_API_MSS_CLAMP_GET_REPLY, ({ rmp->cursor = ~0; }));
+ }
+}
+
+/* API definitions */
+#include <vnet/format_fns.h>
+#include <mss_clamp/mss_clamp.api.c>
+
+/* Set up the API message handling tables */
+static clib_error_t *
+mssc_api_hookup (vlib_main_t *vm)
+{
+ mssc_main_t *cm = &mssc_main;
+
+ cm->msg_id_base = setup_message_id_table ();
+ return 0;
+}
+
+VLIB_API_INIT_FUNCTION (mssc_api_hookup);
+
+VLIB_PLUGIN_REGISTER () = {
+ .version = VPP_BUILD_VER,
+ .description = "TCP MSS clamping plugin",
+};
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */