Changes for supoprting iOAM/ NSH export. Add a separate node for POP only

handling to support iOAM export dynamic node.

Change-Id: I411ee93ea3ec34ed24c18c1ba4b5dc1c9533e483
Signed-off-by: Vengada <venggovi@cisco.com>

1 files changed, 180 insertions, 0 deletions

diff --git a/nsh-plugin/nsh-md2-ioam/export-nsh-md2-ioam/nsh_md2_ioam_export.c b/nsh-plugin/nsh-md2-ioam/export-nsh-md2-ioam/nsh_md2_ioam_export.c
new file mode 100644
index 0000000..4860846
--- /dev/null
+++ b/nsh-plugin/nsh-md2-ioam/export-nsh-md2-ioam/nsh_md2_ioam_export.c
@@ -0,0 +1,180 @@
+/*
+ * 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.
+ */
+/*
+ *------------------------------------------------------------------
+ * nsh_md2_ioam_export.c - ioam export API / debug CLI handling
+ *------------------------------------------------------------------
+ */
+
+#include <vnet/vnet.h>
+#include <vnet/plugin/plugin.h>
+#include <ioam/export-common/ioam_export.h>
+
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+#include <vlibsocket/api.h>
+
+#include <nsh/nsh.h>
+#include <nsh-md2-ioam/nsh_md2_ioam.h>
+
+
+ioam_export_main_t nsh_md2_ioam_export_main;
+
+
+extern vlib_node_registration_t nsh_md2_ioam_export_node;
+extern void nsh_md2_set_next_ioam_export_override (uword next);
+/* Action function shared between message handler and debug CLI */
+int
+nsh_md2_ioam_export_enable_disable (ioam_export_main_t * em,
+				      u8 is_disable,
+				      ip4_address_t * collector_address,
+				      ip4_address_t * src_address)
+{
+  vlib_main_t *vm = em->vlib_main;
+  u32 node_index = nsh_md2_ioam_export_node.index;
+  vlib_node_t *nsh_input_node = NULL;
+
+  if (is_disable == 0)
+    {
+      if (em->my_hbh_slot == ~0)
+	{
+	  /* Hook this export node to nsh-input */
+	  nsh_input_node =
+	    vlib_get_node_by_name (vm, (u8 *) "nsh-input");
+	  if (!nsh_input_node)
+	    {
+	      /* node does not exist give up */
+	      return (-1);
+	    }
+	  em->my_hbh_slot =
+	    vlib_node_add_next (vm, nsh_input_node->index,
+				node_index);
+	}
+      if (1 == ioam_export_header_create (em, collector_address, src_address))
+	{
+	  ioam_export_thread_buffer_init (em, vm);
+	  nsh_md2_set_next_ioam_export_override (em->my_hbh_slot);
+	  /* Turn on the export buffer check process */
+	  vlib_process_signal_event (vm, em->export_process_node_index, 1, 0);
+
+	}
+      else
+	{
+	  return (-2);
+	}
+    }
+  else
+    {
+      nsh_md2_set_next_ioam_export_override (0); // VXLAN_GPE_DECAP_IOAM_V4_NEXT_POP
+      ioam_export_header_cleanup (em, collector_address, src_address);
+      ioam_export_thread_buffer_free (em);
+      /* Turn off the export buffer check process */
+      vlib_process_signal_event (vm, em->export_process_node_index, 2, 0);
+
+    }
+
+  return 0;
+}
+
+
+
+static clib_error_t *
+set_nsh_md2_ioam_export_ipfix_command_fn (vlib_main_t * vm,
+					    unformat_input_t * input,
+					    vlib_cli_command_t * cmd)
+{
+  ioam_export_main_t *em = &nsh_md2_ioam_export_main;
+  ip4_address_t collector, src;
+  u8 is_disable = 0;
+
+  collector.as_u32 = 0;
+  src.as_u32 = 0;
+
+  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (input, "collector %U", unformat_ip4_address, &collector))
+	;
+      else if (unformat (input, "src %U", unformat_ip4_address, &src))
+	;
+      else if (unformat (input, "disable"))
+	is_disable = 1;
+      else
+	break;
+    }
+
+  if (collector.as_u32 == 0)
+    return clib_error_return (0, "collector address required");
+
+  if (src.as_u32 == 0)
+    return clib_error_return (0, "src address required");
+
+  em->ipfix_collector.as_u32 = collector.as_u32;
+  em->src_address.as_u32 = src.as_u32;
+
+  vlib_cli_output (vm, "Collector %U, src address %U",
+		   format_ip4_address, &em->ipfix_collector,
+		   format_ip4_address, &em->src_address);
+
+  /* Turn on the export timer process */
+  // vlib_process_signal_event (vm, flow_report_process_node.index,
+  //1, 0);
+  if (0 !=
+      nsh_md2_ioam_export_enable_disable (em, is_disable, &collector, &src))
+    {
+      return clib_error_return (0, "Unable to set ioam nsh-md2 export");
+    }
+
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (set_nsh_md2_ioam_ipfix_command, static) =
+{
+.path = "set nsh-md2-ioam export ipfix",
+.short_help = "set nsh-md2-ioam export ipfix collector <ip4-address> src <ip4-address>",
+.function = set_nsh_md2_ioam_export_ipfix_command_fn,
+};
+/* *INDENT-ON* */
+
+
+#define IPFIX_NSH_MD2_IOAM_EXPORT_ID 274 // TODO: Move this to ioam/ioam_export.h
+static clib_error_t *
+nsh_md2_ioam_export_init (vlib_main_t * vm)
+{
+  ioam_export_main_t *em = &nsh_md2_ioam_export_main;
+  clib_error_t *error = 0;
+
+  em->set_id = IPFIX_NSH_MD2_IOAM_EXPORT_ID;
+  em->unix_time_0 = (u32) time (0);	/* Store starting time */
+  em->vlib_time_0 = vlib_time_now (vm);
+
+  em->my_hbh_slot = ~0;
+  em->vlib_main = vm;
+  em->vnet_main = vnet_get_main ();
+  ioam_export_reset_next_node (em);
+
+  return error;
+}
+
+VLIB_INIT_FUNCTION (nsh_md2_ioam_export_init);
+
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */