vppinfra: add mapped pcap file support

Type: feature

Change-Id: Ic720d56a6f8901efde2a58519bc9aa553205a9a6
Signed-off-by: Gary Boon <gboon@cisco.com>
Signed-off-by: Dave Barach <dave@barachs.net>

2 files changed, 261 insertions, 0 deletions

diff --git a/src/plugins/unittest/CMakeLists.txt b/src/plugins/unittest/CMakeLists.txt
index 5ba21bd7acb..e074d317b0a 100644
--- a/src/plugins/unittest/CMakeLists.txt
+++ b/src/plugins/unittest/CMakeLists.txt
@@ -28,6 +28,7 @@ add_vpp_plugin(unittest
   lisp_cp_test.c
   llist_test.c
   mactime_test.c
+  mpcap_node.c
   mfib_test.c
   punt_test.c
   rbtree_test.c
diff --git a/src/plugins/unittest/mpcap_node.c b/src/plugins/unittest/mpcap_node.c
new file mode 100644
index 00000000000..8c0bc8677be
--- /dev/null
+++ b/src/plugins/unittest/mpcap_node.c
@@ -0,0 +1,260 @@
+/*
+ * mpcap_node.c - unit-test plugin mapped pcap test node
+ *
+ * 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 <vlib/vlib.h>
+#include <vnet/vnet.h>
+#include <vnet/pg/pg.h>
+#include <vppinfra/error.h>
+#include <vppinfra/mpcap.h>
+#include <vnet/ethernet/ethernet.h>
+
+static mpcap_main_t test_mpcap_main = {
+  .file_name = "/tmp/mpcap_unittest.pcap",
+  .n_packets_to_capture = 15,
+  .packet_type = MPCAP_PACKET_TYPE_ethernet,
+};
+
+typedef struct
+{
+  u32 sw_if_index;
+  u32 next_index;
+} mpcap_trace_t;
+
+#ifndef CLIB_MARCH_VARIANT
+
+/* packet trace format function */
+static u8 *
+format_mpcap_trace (u8 * s, va_list * args)
+{
+  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+  mpcap_trace_t *t = va_arg (*args, mpcap_trace_t *);
+
+  s = format (s, "MPCAP: sw_if_index %d, next index %d\n",
+	      t->sw_if_index, t->next_index);
+  return s;
+}
+
+vlib_node_registration_t mpcap_node;
+
+#endif /* CLIB_MARCH_VARIANT */
+
+#define foreach_mpcap_error \
+_(PROCESSED, "Mapped pcap packets processed")
+
+typedef enum
+{
+#define _(sym,str) MPCAP_ERROR_##sym,
+  foreach_mpcap_error
+#undef _
+    MPCAP_N_ERROR,
+} mpcap_error_t;
+
+#ifndef CLIB_MARCH_VARIANT
+static char *mpcap_error_strings[] = {
+#define _(sym,string) string,
+  foreach_mpcap_error
+#undef _
+};
+#endif /* CLIB_MARCH_VARIANT */
+
+typedef enum
+{
+  MPCAP_NEXT_DROP,
+  MPCAP_N_NEXT,
+} mpcap_next_t;
+
+always_inline uword
+mpcap_inline (vlib_main_t * vm,
+	      vlib_node_runtime_t * node, vlib_frame_t * frame,
+	      int is_ip4, int is_trace)
+{
+  u32 n_left_from, *from;
+  vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
+  u16 nexts[VLIB_FRAME_SIZE], *next;
+  mpcap_main_t *mm = &test_mpcap_main;
+  int i = 0;
+  f64 now = vlib_time_now (vm);
+  u32 error_index = node->errors[MPCAP_ERROR_PROCESSED];
+
+  if (!(mm->flags & MPCAP_FLAG_INIT_DONE))
+    {
+      clib_error_t *error;
+
+      error = mpcap_init (mm);
+      if (error)
+	clib_error_report (error);
+      mm->flags |= MPCAP_FLAG_INIT_DONE;
+    }
+
+  from = vlib_frame_vector_args (frame);
+  n_left_from = frame->n_vectors;
+
+  vlib_get_buffers (vm, from, bufs, n_left_from);
+  b = bufs;
+  next = nexts;
+
+  while (n_left_from >= 4)
+    {
+      /* Prefetch next iteration. */
+      if (PREDICT_TRUE (n_left_from >= 8))
+	{
+	  vlib_prefetch_buffer_header (b[4], STORE);
+	  vlib_prefetch_buffer_header (b[5], STORE);
+	  vlib_prefetch_buffer_header (b[6], STORE);
+	  vlib_prefetch_buffer_header (b[7], STORE);
+	  CLIB_PREFETCH (b[4]->data, CLIB_CACHE_LINE_BYTES, STORE);
+	  CLIB_PREFETCH (b[5]->data, CLIB_CACHE_LINE_BYTES, STORE);
+	  CLIB_PREFETCH (b[6]->data, CLIB_CACHE_LINE_BYTES, STORE);
+	  CLIB_PREFETCH (b[7]->data, CLIB_CACHE_LINE_BYTES, STORE);
+	}
+
+      next[0] = 0;
+      next[1] = 0;
+      next[2] = 0;
+      next[3] = 0;
+
+      b[0]->error = error_index;
+      b[1]->error = error_index;
+      b[2]->error = error_index;
+      b[3]->error = error_index;
+
+      mpcap_add_buffer (mm, vm, now, from[i++],
+			vlib_buffer_length_in_chain (vm, b[0]));
+
+      mpcap_add_buffer (mm, vm, now, from[i++],
+			vlib_buffer_length_in_chain (vm, b[1]));
+
+      mpcap_add_buffer (mm, vm, now, from[i++],
+			vlib_buffer_length_in_chain (vm, b[2]));
+
+      mpcap_add_buffer (mm, vm, now, from[i++],
+			vlib_buffer_length_in_chain (vm, b[3]));
+
+      if (is_trace)
+	{
+	  if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
+	    {
+	      mpcap_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t));
+	      t->next_index = next[0];
+	      t->sw_if_index = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
+	    }
+	  if (b[1]->flags & VLIB_BUFFER_IS_TRACED)
+	    {
+	      mpcap_trace_t *t = vlib_add_trace (vm, node, b[1], sizeof (*t));
+	      t->next_index = next[1];
+	      t->sw_if_index = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
+	    }
+	  if (b[2]->flags & VLIB_BUFFER_IS_TRACED)
+	    {
+	      mpcap_trace_t *t = vlib_add_trace (vm, node, b[2], sizeof (*t));
+	      t->next_index = next[2];
+	      t->sw_if_index = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
+	    }
+	  if (b[3]->flags & VLIB_BUFFER_IS_TRACED)
+	    {
+	      mpcap_trace_t *t = vlib_add_trace (vm, node, b[3], sizeof (*t));
+	      t->next_index = next[3];
+	      t->sw_if_index = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
+	    }
+	}
+
+      b += 4;
+      next += 4;
+      n_left_from -= 4;
+    }
+
+  while (n_left_from > 0)
+    {
+      mpcap_add_buffer (mm, vm, now, from[i++],
+			vlib_buffer_length_in_chain (vm, b[0]));
+      next[0] = 0;
+      b[0]->error = error_index;
+
+      if (is_trace)
+	{
+	  if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
+	    {
+	      mpcap_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t));
+	      t->next_index = next[0];
+	      t->sw_if_index = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
+	    }
+	}
+
+      b += 1;
+      next += 1;
+      n_left_from -= 1;
+    }
+
+  vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
+
+  return frame->n_vectors;
+}
+
+VLIB_NODE_FN (mpcap_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
+			   vlib_frame_t * frame)
+{
+  if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE))
+    return mpcap_inline (vm, node, frame, 1 /* is_ip4 */ ,
+			 1 /* is_trace */ );
+  else
+    return mpcap_inline (vm, node, frame, 1 /* is_ip4 */ ,
+			 0 /* is_trace */ );
+}
+
+/* *INDENT-OFF* */
+#ifndef CLIB_MARCH_VARIANT
+VLIB_REGISTER_NODE (mpcap_node) =
+{
+  .name = "mpcap-unittest",
+  .vector_size = sizeof (u32),
+  .format_trace = format_mpcap_trace,
+  .format_buffer = format_ethernet_header_with_length,
+  .unformat_buffer = unformat_ethernet_header,
+
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_errors = ARRAY_LEN(mpcap_error_strings),
+  .error_strings = mpcap_error_strings,
+
+  .n_next_nodes = MPCAP_N_NEXT,
+
+  /* edit / add dispositions here */
+  .next_nodes =
+  {
+    [MPCAP_NEXT_DROP] = "error-drop",
+  },
+};
+
+static clib_error_t *
+mpcap_node_init (vlib_main_t *vm)
+{
+  /* So we can send ethernet/IP packets from the pg... */
+  ethernet_setup_node (vm, mpcap_node.index);
+  return 0;
+}
+VLIB_INIT_FUNCTION (mpcap_node_init);
+
+#endif /* CLIB_MARCH_VARIANT */
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */