In-band OAM active probe (VPP-471)

Change-Id: Icf0ddf76ba1c8b588c79387284cd0349ebc6e45f
Signed-off-by: AkshayaNadahalli <anadahal@cisco.com>

1 files changed, 190 insertions, 0 deletions

diff --git a/src/plugins/ioam/udp-ping/udp_ping_api.c b/src/plugins/ioam/udp-ping/udp_ping_api.c
new file mode 100644
index 00000000..8cb8cc96
--- /dev/null
+++ b/src/plugins/ioam/udp-ping/udp_ping_api.c
@@ -0,0 +1,190 @@
+/*
+ * Copyright (c) 2017 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.
+ */
+/*
+ *------------------------------------------------------------------
+ * udp_ping_api.c - UDP Ping related APIs to create
+ *             and maintain ping flows
+ *------------------------------------------------------------------
+ */
+
+#include <vnet/vnet.h>
+#include <vnet/ip/ip.h>
+#include <ioam/udp-ping/udp_ping.h>
+
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+#include <vlibsocket/api.h>
+
+/* define message IDs */
+#include <ioam/udp-ping/udp_ping_msg_enum.h>
+
+/* define message structures */
+#define vl_typedefs
+#include <ioam/udp-ping/udp_ping_all_api_h.h>
+#undef vl_typedefs
+
+/* define generated endian-swappers */
+#define vl_endianfun
+#include <ioam/udp-ping/udp_ping_all_api_h.h>
+#undef vl_endianfun
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
+#define vl_printfun
+#include <ioam/udp-ping/udp_ping_all_api_h.h>
+#undef vl_printfun
+
+/* Get the API version number */
+#define vl_api_version(n,v) static u32 api_version=(v);
+#include <ioam/udp-ping/udp_ping_all_api_h.h>
+#undef vl_api_version
+
+/*
+ * A handy macro to set up a message reply.
+ * Assumes that the following variables are available:
+ * mp - pointer to request message
+ * rmp - pointer to reply message type
+ * rv - return value
+ */
+
+#define REPLY_MACRO(t)                                          \
+    do {                                                            \
+        unix_shared_memory_queue_t * q =                            \
+        vl_api_client_index_to_input_queue (mp->client_index);      \
+        if (!q)                                                     \
+        return;                                                 \
+        \
+        rmp = vl_msg_api_alloc (sizeof (*rmp));                     \
+        rmp->_vl_msg_id = ntohs((t)+sm->msg_id_base);               \
+        rmp->context = mp->context;                                 \
+        rmp->retval = ntohl(rv);                                    \
+        \
+        vl_msg_api_send_shmem (q, (u8 *)&rmp);                      \
+    } while(0);
+
+#define REPLY_MACRO2(t, body)                                   \
+    do {                                                            \
+        unix_shared_memory_queue_t * q;                             \
+        rv = vl_msg_api_pd_handler (mp, rv);                        \
+        q = vl_api_client_index_to_input_queue (mp->client_index);  \
+        if (!q)                                                     \
+        return;                                                 \
+        \
+        rmp = vl_msg_api_alloc (sizeof (*rmp));                     \
+        rmp->_vl_msg_id = ntohs((t));                               \
+        rmp->context = mp->context;                                 \
+        rmp->retval = ntohl(rv);                                    \
+        do {body;} while (0);                                       \
+        vl_msg_api_send_shmem (q, (u8 *)&rmp);                      \
+    } while(0);
+
+/* List of message types that this module understands */
+
+#define foreach_udp_ping_api_msg                                      \
+    _(UDP_PING_ADD_DEL_REQ, udp_ping_add_del_req)                                     \
+    _(UDP_PING_EXPORT_REQ, udp_ping_export_req)                                     \
+
+static void vl_api_udp_ping_add_del_req_t_handler
+  (vl_api_udp_ping_add_del_req_t * mp)
+{
+  ip46_address_t dst, src;
+  int rv = 0;
+  udp_ping_main_t *sm = &udp_ping_main;
+  vl_api_udp_ping_add_del_reply_t *rmp;
+
+  if (mp->is_ipv4)
+    {
+      rv = -1;			//Not supported
+      goto ERROROUT;
+    }
+
+  clib_memcpy ((void *) &src.ip6, (void *) mp->src_ip_address,
+	       sizeof (ip6_address_t));
+  clib_memcpy ((void *) &dst.ip6, (void *) mp->dst_ip_address,
+	       sizeof (ip6_address_t));
+
+  ip46_udp_ping_set_flow (src, dst,
+			  ntohs (mp->start_src_port),
+			  ntohs (mp->end_src_port),
+			  ntohs (mp->start_dst_port),
+			  ntohs (mp->end_dst_port),
+			  ntohs (mp->interval), mp->fault_det, mp->dis);
+  rv = 0;			//FIXME
+
+ERROROUT:
+  REPLY_MACRO (VL_API_UDP_PING_ADD_DEL_REPLY);
+}
+
+static void vl_api_udp_ping_export_req_t_handler
+  (vl_api_udp_ping_export_req_t * mp)
+{
+  udp_ping_main_t *sm = &udp_ping_main;
+  int rv = 0;
+  vl_api_udp_ping_export_reply_t *rmp;
+
+  (void) udp_ping_flow_create (!mp->enable);
+  rv = 0;			//FIXME
+
+  REPLY_MACRO (VL_API_UDP_PING_EXPORT_REPLY);
+}
+
+/* Set up the API message handling tables */
+static clib_error_t *
+udp_ping_api_hookup (vlib_main_t * vm)
+{
+  udp_ping_main_t *sm = &udp_ping_main;
+#define _(N,n)                                                  \
+    vl_msg_api_set_handlers((VL_API_##N + sm->msg_id_base),     \
+                            #n,					\
+                            vl_api_##n##_t_handler,              \
+                            vl_noop_handler,                     \
+                            vl_api_##n##_t_endian,               \
+                            vl_api_##n##_t_print,                \
+                            sizeof(vl_api_##n##_t), 1);
+  foreach_udp_ping_api_msg;
+#undef _
+
+  return 0;
+}
+
+static clib_error_t *
+udp_ping_api_init (vlib_main_t * vm)
+{
+  udp_ping_main_t *sm = &udp_ping_main;
+  clib_error_t *error = 0;
+  u8 *name;
+
+  name = format (0, "udp_ping_%08x%c", api_version, 0);
+
+  /* Ask for a correctly-sized block of API message decode slots */
+  sm->msg_id_base = vl_msg_api_get_msg_ids
+    ((char *) name, VL_MSG_FIRST_AVAILABLE);
+
+  error = udp_ping_api_hookup (vm);
+
+  vec_free (name);
+
+  return error;
+}
+
+VLIB_INIT_FUNCTION (udp_ping_api_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */