Add ILA API and API test plugin VPP-412

The ILA plugin could only be configured through CLI.
This patch adds API support to ila_interface and
ila_add_del_entry functions.
The patch also adds a test plugin for vpp_api_test.

Change-Id: I35d96c4e56bb32862cd08cc86a9fa25ff56ef583
Signed-off-by: Pierre Pfister <ppfister@cisco.com>

1 files changed, 319 insertions, 0 deletions

diff --git a/plugins/ila-plugin/ila/ila_api_test.c b/plugins/ila-plugin/ila/ila_api_test.c
new file mode 100644
index 00000000000..dbd001a0fb6
--- /dev/null
+++ b/plugins/ila-plugin/ila/ila_api_test.c
@@ -0,0 +1,319 @@
+/*
+ * 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.
+ */
+
+#include <vat/vat.h>
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+#include <vlibsocket/api.h>
+#include <vppinfra/error.h>
+#include <ila/ila.h>
+
+
+#define vl_msg_id(n,h) n,
+typedef enum
+{
+#include <ila/ila.api.h>
+  /* We'll want to know how many messages IDs we need... */
+  VL_MSG_FIRST_AVAILABLE,
+} vl_msg_id_t;
+#undef vl_msg_id
+
+/* define message structures */
+#define vl_typedefs
+#include <ila/ila.api.h>
+#undef vl_typedefs
+
+/* declare message handlers for each api */
+
+#define vl_endianfun		/* define message structures */
+#include <ila/ila.api.h>
+#undef vl_endianfun
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...)
+#define vl_printfun
+#include <ila/ila.api.h>
+#undef vl_printfun
+
+/* Get the API version number. */
+#define vl_api_version(n,v) static u32 api_version=(v);
+#include <ila/ila.api.h>
+#undef vl_api_version
+
+typedef struct
+{
+  /* API message ID base */
+  u16 msg_id_base;
+  vat_main_t *vat_main;
+} ila_api_test_main_t;
+
+
+/*
+ * Unformat functions are replicate from ila.c
+ *
+ */
+
+static uword
+unformat_ila_direction (unformat_input_t * input, va_list * args)
+{
+  ila_direction_t *result = va_arg (*args, ila_direction_t *);
+#define _(i,n,s) \
+  if (unformat(input, s)) \
+      { \
+        *result = ILA_DIR_##i; \
+        return 1;\
+      }
+
+  ila_foreach_direction
+#undef _
+    return 0;
+}
+
+static uword
+unformat_ila_type (unformat_input_t * input, va_list * args)
+{
+  ila_type_t *result = va_arg (*args, ila_type_t *);
+#define _(i,n,s) \
+  if (unformat(input, s)) \
+      { \
+        *result = ILA_TYPE_##i; \
+        return 1;\
+      }
+
+  ila_foreach_type
+#undef _
+    return 0;
+}
+
+static uword
+unformat_ila_csum_mode (unformat_input_t * input, va_list * args)
+{
+  ila_csum_mode_t *result = va_arg (*args, ila_csum_mode_t *);
+  if (unformat (input, "none") || unformat (input, "no-action"))
+    {
+      *result = ILA_CSUM_MODE_NO_ACTION;
+      return 1;
+    }
+  if (unformat (input, "neutral-map"))
+    {
+      *result = ILA_CSUM_MODE_NEUTRAL_MAP;
+      return 1;
+    }
+  if (unformat (input, "adjust-transport"))
+    {
+      *result = ILA_CSUM_MODE_ADJUST_TRANSPORT;
+      return 1;
+    }
+  return 0;
+}
+
+static uword
+unformat_half_ip6_address (unformat_input_t * input, va_list * args)
+{
+  u64 *result = va_arg (*args, u64 *);
+  u32 a[4];
+
+  if (!unformat (input, "%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3]))
+    return 0;
+
+  if (a[0] > 0xFFFF || a[1] > 0xFFFF || a[2] > 0xFFFF || a[3] > 0xFFFF)
+    return 0;
+
+  *result = clib_host_to_net_u64 ((((u64) a[0]) << 48) |
+				  (((u64) a[1]) << 32) |
+				  (((u64) a[2]) << 16) | (((u64) a[3])));
+
+  return 1;
+}
+
+ila_api_test_main_t ila_api_test_main;
+
+#define foreach_standard_reply_retval_handler   \
+  _(ila_iface_reply)                  \
+  _(ila_add_del_entry_reply)
+
+#define _(n)                                            \
+    static void vl_api_##n##_t_handler                  \
+    (vl_api_##n##_t * mp)                               \
+    {                                                   \
+        vat_main_t * vam = ila_api_test_main.vat_main;  \
+        i32 retval = ntohl(mp->retval);                 \
+        if (vam->async_mode) {                          \
+            vam->async_errors += (retval < 0);          \
+        } else {                                        \
+            vam->retval = retval;                       \
+            vam->result_ready = 1;                      \
+        }                                               \
+    }
+foreach_standard_reply_retval_handler;
+#undef _
+
+#define foreach_vpe_api_reply_msg                               \
+  _(ILA_IFACE_REPLY, ila_iface_reply)                           \
+  _(ILA_ADD_DEL_ENTRY_REPLY, ila_add_del_entry_reply)
+
+/* M: construct, but don't yet send a message */
+#define M(T,t)                                                  \
+do {                                                            \
+    vam->result_ready = 0;                                      \
+    mp = vl_msg_api_alloc(sizeof(*mp));                         \
+    memcpy (mp, &mps, sizeof (*mp));                            \
+    mp->_vl_msg_id =                                            \
+      ntohs (VL_API_##T + ila_api_test_main.msg_id_base);       \
+    mp->client_index = vam->my_client_index;                    \
+} while(0);
+
+/* S: send a message */
+#define S (vl_msg_api_send_shmem (vam->vl_input_queue, (u8 *)&mp))
+
+/* W: wait for results, with timeout */
+#define W                                       \
+do {                                            \
+    timeout = vat_time_now (vam) + 1.0;         \
+                                                \
+    while (vat_time_now (vam) < timeout) {      \
+        if (vam->result_ready == 1) {           \
+            return (vam->retval);               \
+        }                                       \
+    }                                           \
+    return -99;                                 \
+} while(0);
+
+static int
+api_ila_iface (vat_main_t * vam)
+{
+  unformat_input_t *i = vam->input;
+  f64 timeout;
+  vl_api_ila_iface_t mps, *mp;
+
+  mps.enable = 1;
+  if (!unformat (i, "%u", &mps.sw_if_index))
+    {
+      errmsg ("invalid arguments\n");
+      return -99;
+    }
+
+  if (unformat (i, "disable"))
+    mps.enable = 0;
+
+  M (ILA_IFACE, ila_iface);
+  S;
+  W;
+  /* NOTREACHED */
+  return 0;
+}
+
+static int
+api_ila_add_del_entry (vat_main_t * vam)
+{
+  unformat_input_t *i = vam->input;
+  f64 timeout;
+  vl_api_ila_add_del_entry_t mps, *mp;
+
+  mps.type = ILA_TYPE_IID;
+  mps.csum_mode = ILA_CSUM_MODE_NO_ACTION;
+  mps.local_adj_index = ~0;
+  mps.dir = ILA_DIR_BIDIR;
+
+  while (unformat_check_input (i) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (i, "type %U", unformat_ila_type, &mps.type))
+	;
+      else if (unformat
+	       (i, "sir-address %U", unformat_ip6_address, &mps.sir_address))
+	;
+      else if (unformat
+	       (i, "locator %U", unformat_half_ip6_address, &mps.locator))
+	;
+      else if (unformat (i, "adj-index %u", &mps.local_adj_index))
+	;
+      else if (unformat
+	       (i, "csum-mode %U", unformat_ila_csum_mode, &mps.csum_mode))
+	;
+      else if (unformat (i, "vnid %x", &mps.vnid))
+	;
+      else if (unformat (i, "direction %U", unformat_ila_direction, &mps.dir))
+	;
+      else if (unformat (i, "del"))
+	mps.is_del = 1;
+      else
+	{
+	  errmsg ("invalid arguments\n");
+	  return -99;
+	}
+    }
+
+  M (ILA_ADD_DEL_ENTRY, ila_add_del_entry);
+  S;
+  W;
+  /* NOTREACHED */
+  return 0;
+}
+
+/*
+ * List of messages that the api test plugin sends,
+ * and that the data plane plugin processes
+ */
+#define foreach_vpe_api_msg                             \
+_(ila_iface, "<sw-if-index> [disable]")                 \
+_(ila_add_del_entry, "[type ("ila_type_list")] [sir-address <address>]" \
+" [locator <locator>] [vnid <hex-vnid>]" \
+" [adj-index <adj-index>] [direction ("ila_direction_list")]" \
+" [csum-mode ("ila_csum_list")] [del]")
+
+void
+vat_api_hookup (vat_main_t * vam)
+{
+  /* Hook up handlers for replies from the data plane plug-in */
+#define _(N,n)                                                          \
+  vl_msg_api_set_handlers((VL_API_##N + ila_api_test_main.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_vpe_api_reply_msg;
+#undef _
+
+  /* API messages we can send */
+#define _(n,h) hash_set_mem (vam->function_by_name, #n, api_##n);
+  foreach_vpe_api_msg;
+#undef _
+
+  /* Help strings */
+#define _(n,h) hash_set_mem (vam->help_by_name, #n, h);
+  foreach_vpe_api_msg;
+#undef _
+}
+
+clib_error_t *
+vat_plugin_register (vat_main_t * vam)
+{
+  u8 *name;
+
+  ila_api_test_main.vat_main = vam;
+
+  /* Ask the vpp engine for the first assigned message-id */
+  name = format (0, "ila_%08x%c", api_version, 0);
+  ila_api_test_main.msg_id_base =
+    vl_client_get_first_plugin_msg_id ((char *) name);
+
+  if (ila_api_test_main.msg_id_base != (u16) ~ 0)
+    vat_api_hookup (vam);
+
+  vec_free (name);
+  return 0;
+}