Network delay simulator plugin

Change-Id: I4a70c7df8f0cb368a4e1cb16f30eeef5c6058c79
Signed-off-by: Dave Barach <dave@barachs.net>

1 files changed, 285 insertions, 0 deletions

diff --git a/src/plugins/nsim/nsim_test.c b/src/plugins/nsim/nsim_test.c
new file mode 100644
index 00000000000..0e2a26af55b
--- /dev/null
+++ b/src/plugins/nsim/nsim_test.c
@@ -0,0 +1,285 @@
+/*
+ * nsim.c - skeleton vpp-api-test 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 <vat/vat.h>
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+#include <vppinfra/error.h>
+
+uword unformat_sw_if_index (unformat_input_t * input, va_list * args);
+
+/* Declare message IDs */
+#include <nsim/nsim_msg_enum.h>
+
+/* define message structures */
+#define vl_typedefs
+#include <nsim/nsim_all_api_h.h>
+#undef vl_typedefs
+
+/* declare message handlers for each api */
+
+#define vl_endianfun		/* define message structures */
+#include <nsim/nsim_all_api_h.h>
+#undef vl_endianfun
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...)
+#define vl_printfun
+#include <nsim/nsim_all_api_h.h>
+#undef vl_printfun
+
+/* Get the API version number. */
+#define vl_api_version(n,v) static u32 api_version=(v);
+#include <nsim/nsim_all_api_h.h>
+#undef vl_api_version
+
+
+typedef struct
+{
+  /* API message ID base */
+  u16 msg_id_base;
+  vat_main_t *vat_main;
+} nsim_test_main_t;
+
+nsim_test_main_t nsim_test_main;
+
+#define __plugin_msg_base nsim_test_main.msg_id_base
+#include <vlibapi/vat_helper_macros.h>
+
+#define foreach_standard_reply_retval_handler   \
+_(nsim_enable_disable_reply)                    \
+_(nsim_configure_reply)
+
+#define _(n)                                            \
+    static void vl_api_##n##_t_handler                  \
+    (vl_api_##n##_t * mp)                               \
+    {                                                   \
+        vat_main_t * vam = nsim_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 _
+
+/*
+ * Table of message reply handlers, must include boilerplate handlers
+ * we just generated
+ */
+#define foreach_vpe_api_reply_msg                       \
+_(NSIM_ENABLE_DISABLE_REPLY, nsim_enable_disable_reply) \
+_(NSIM_CONFIGURE_REPLY, nsim_configure_reply)
+
+static int
+api_nsim_enable_disable (vat_main_t * vam)
+{
+  unformat_input_t *i = vam->input;
+  int enable_disable = 1;
+  u32 sw_if_index0 = ~0;
+  u32 sw_if_index1 = ~0;
+  u32 tmp;
+  vl_api_nsim_enable_disable_t *mp;
+  int ret;
+
+  /* Parse args required to build the message */
+  while (unformat_check_input (i) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (i, "%U", unformat_sw_if_index, vam, &tmp))
+	{
+	  if (sw_if_index0 == ~0)
+	    sw_if_index0 = tmp;
+	  else
+	    sw_if_index1 = tmp;
+	}
+      else if (unformat (i, "sw_if_index %d", &tmp))
+	{
+	  if (sw_if_index0 == ~0)
+	    sw_if_index0 = tmp;
+	  else
+	    sw_if_index1 = tmp;
+	}
+      else if (unformat (i, "disable"))
+	enable_disable = 0;
+      else
+	break;
+    }
+
+  if (sw_if_index0 == ~0 || sw_if_index1 == ~0)
+    {
+      errmsg ("missing interface name / explicit sw_if_index number \n");
+      return -99;
+    }
+
+  /* Construct the API message */
+  M (NSIM_ENABLE_DISABLE, mp);
+  mp->sw_if_index0 = ntohl (sw_if_index0);
+  mp->sw_if_index1 = ntohl (sw_if_index1);
+  mp->enable_disable = enable_disable;
+
+  /* send it... */
+  S (mp);
+
+  /* Wait for a reply... */
+  W (ret);
+  return ret;
+}
+
+static uword
+unformat_delay (unformat_input_t * input, va_list * args)
+{
+  f64 *result = va_arg (*args, f64 *);
+  f64 tmp;
+
+  if (unformat (input, "%f us", &tmp))
+    *result = tmp * 1e-6;
+  else if (unformat (input, "%f ms", &tmp))
+    *result = tmp * 1e-3;
+  else if (unformat (input, "%f sec", &tmp))
+    *result = tmp;
+  else
+    return 0;
+
+  return 1;
+}
+
+static uword
+unformat_bandwidth (unformat_input_t * input, va_list * args)
+{
+  f64 *result = va_arg (*args, f64 *);
+  f64 tmp;
+
+  if (unformat (input, "%f gbit", &tmp))
+    *result = tmp * 1e9;
+  else if (unformat (input, "%f gbyte", &tmp))
+    *result = tmp * 8e9;
+  else
+    return 0;
+  return 1;
+}
+
+static int
+api_nsim_configure (vat_main_t * vam)
+{
+  vl_api_nsim_configure_t *mp;
+  unformat_input_t *i = vam->input;
+  f64 delay = 0.0, bandwidth = 0.0;
+  f64 packet_size = 1500.0;
+  u32 num_workers = vlib_num_workers ();
+  int ret;
+
+  while (unformat_check_input (i) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (i, "delay %U", unformat_delay, &delay))
+	;
+      else if (unformat (i, "bandwidth %U", unformat_bandwidth, &bandwidth))
+	;
+      else if (unformat (i, "packet-size %f", &packet_size))
+	;
+      else
+	break;
+    }
+
+  if (delay == 0.0 || bandwidth == 0.0)
+    {
+      errmsg ("must specify delay and bandwidth");
+      return -99;
+    }
+
+  /* Construct the API message */
+  M (NSIM_CONFIGURE, mp);
+  mp->delay_in_usec = (u32) (delay * 1e6);
+  mp->delay_in_usec = ntohl (mp->delay_in_usec);
+  mp->average_packet_size = (u32) (packet_size);
+  mp->average_packet_size = ntohl (mp->average_packet_size);
+  mp->bandwidth_in_bits_per_second = (u64) (bandwidth);
+  mp->bandwidth_in_bits_per_second =
+    clib_host_to_net_u64 (mp->bandwidth_in_bits_per_second);
+
+  /* send it... */
+  S (mp);
+
+  /* Wait for a reply... */
+  W (ret);
+  return ret;
+}
+
+/*
+ * List of messages that the api test plugin sends,
+ * and that the data plane plugin processes
+ */
+#define foreach_vpe_api_msg                                             \
+_(nsim_enable_disable,                                                  \
+"[<intfc0> | sw_if_index <swif0>] [<intfc1> | sw_if_index <swif1>] [disable]") \
+_(nsim_configure, "delay <time> bandwidth <bw> [packet-size <nn>]")
+
+static void
+nsim_api_hookup (vat_main_t * vam)
+{
+  nsim_test_main_t *sm = &nsim_test_main;
+  /* Hook up handlers for replies from the data plane plug-in */
+#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_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)
+{
+  nsim_test_main_t *sm = &nsim_test_main;
+  u8 *name;
+
+  sm->vat_main = vam;
+
+  /* Ask the vpp engine for the first assigned message-id */
+  name = format (0, "nsim_%08x%c", api_version, 0);
+  sm->msg_id_base = vl_client_get_first_plugin_msg_id ((char *) name);
+
+  if (sm->msg_id_base != (u16) ~ 0)
+    nsim_api_hookup (vam);
+
+  vec_free (name);
+
+  return 0;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */