Reorganize source tree to use single autotools instance

Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23
Signed-off-by: Damjan Marion <damarion@cisco.com>

1 files changed, 353 insertions, 0 deletions

diff --git a/src/vnet/snap/node.c b/src/vnet/snap/node.c
new file mode 100644
index 00000000000..884ff32444b
--- /dev/null
+++ b/src/vnet/snap/node.c
@@ -0,0 +1,353 @@
+/*
+ * Copyright (c) 2015 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.
+ */
+/*
+ * snap_node.c: snap packet processing
+ *
+ * Copyright (c) 2010 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <vlib/vlib.h>
+#include <vnet/pg/pg.h>
+#include <vnet/llc/llc.h>
+#include <vnet/snap/snap.h>
+
+typedef enum
+{
+  SNAP_INPUT_NEXT_DROP,
+  SNAP_INPUT_NEXT_PUNT,
+  SNAP_INPUT_NEXT_ETHERNET_TYPE,
+  SNAP_INPUT_N_NEXT,
+} snap_input_next_t;
+
+typedef struct
+{
+  u8 packet_data[32];
+} snap_input_trace_t;
+
+static u8 *
+format_snap_input_trace (u8 * s, va_list * va)
+{
+  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
+  CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
+  snap_input_trace_t *t = va_arg (*va, snap_input_trace_t *);
+
+  s = format (s, "%U", format_snap_header, t->packet_data);
+
+  return s;
+}
+
+static uword
+snap_input (vlib_main_t * vm,
+	    vlib_node_runtime_t * node, vlib_frame_t * from_frame)
+{
+  snap_main_t *sm = &snap_main;
+  u32 n_left_from, next_index, *from, *to_next;
+
+  from = vlib_frame_vector_args (from_frame);
+  n_left_from = from_frame->n_vectors;
+
+  if (node->flags & VLIB_NODE_FLAG_TRACE)
+    vlib_trace_frame_buffers_only (vm, node,
+				   from,
+				   n_left_from,
+				   sizeof (from[0]),
+				   sizeof (snap_input_trace_t));
+
+  next_index = node->cached_next_index;
+
+  while (n_left_from > 0)
+    {
+      u32 n_left_to_next;
+
+      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+      while (n_left_from >= 4 && n_left_to_next >= 2)
+	{
+	  u32 bi0, bi1;
+	  vlib_buffer_t *b0, *b1;
+	  snap_header_t *h0, *h1;
+	  snap_protocol_info_t *pi0, *pi1;
+	  u8 next0, next1, is_ethernet0, is_ethernet1, len0, len1,
+	    enqueue_code;
+	  u32 oui0, oui1;
+
+	  /* Prefetch next iteration. */
+	  {
+	    vlib_buffer_t *b2, *b3;
+
+	    b2 = vlib_get_buffer (vm, from[2]);
+	    b3 = vlib_get_buffer (vm, from[3]);
+
+	    vlib_prefetch_buffer_header (b2, LOAD);
+	    vlib_prefetch_buffer_header (b3, LOAD);
+
+	    CLIB_PREFETCH (b2->data, sizeof (h0[0]), LOAD);
+	    CLIB_PREFETCH (b3->data, sizeof (h1[0]), LOAD);
+	  }
+
+	  bi0 = from[0];
+	  bi1 = from[1];
+	  to_next[0] = bi0;
+	  to_next[1] = bi1;
+	  from += 2;
+	  to_next += 2;
+	  n_left_to_next -= 2;
+	  n_left_from -= 2;
+
+	  b0 = vlib_get_buffer (vm, bi0);
+	  b1 = vlib_get_buffer (vm, bi1);
+
+	  h0 = (void *) (b0->data + b0->current_data);
+	  h1 = (void *) (b1->data + b1->current_data);
+
+	  oui0 = snap_header_get_oui (h0);
+	  oui1 = snap_header_get_oui (h1);
+
+	  is_ethernet0 = oui0 == IEEE_OUI_ethernet;
+	  is_ethernet1 = oui1 == IEEE_OUI_ethernet;
+
+	  len0 = sizeof (h0[0]) - (is_ethernet0 ? sizeof (h0->protocol) : 0);
+	  len1 = sizeof (h1[0]) - (is_ethernet1 ? sizeof (h1->protocol) : 0);
+
+	  b0->current_data += len0;
+	  b1->current_data += len1;
+
+	  b0->current_length -= len0;
+	  b1->current_length -= len1;
+
+	  pi0 = snap_get_protocol_info (sm, h0);
+	  pi1 = snap_get_protocol_info (sm, h1);
+
+	  next0 = pi0 ? pi0->next_index : SNAP_INPUT_NEXT_DROP;
+	  next1 = pi1 ? pi1->next_index : SNAP_INPUT_NEXT_DROP;
+
+	  next0 = is_ethernet0 ? SNAP_INPUT_NEXT_ETHERNET_TYPE : next0;
+	  next1 = is_ethernet1 ? SNAP_INPUT_NEXT_ETHERNET_TYPE : next1;
+
+	  /* In case of error. */
+	  b0->error = node->errors[SNAP_ERROR_UNKNOWN_PROTOCOL];
+	  b1->error = node->errors[SNAP_ERROR_UNKNOWN_PROTOCOL];
+
+	  enqueue_code = (next0 != next_index) + 2 * (next1 != next_index);
+
+	  if (PREDICT_FALSE (enqueue_code != 0))
+	    {
+	      switch (enqueue_code)
+		{
+		case 1:
+		  /* A B A */
+		  to_next[-2] = bi1;
+		  to_next -= 1;
+		  n_left_to_next += 1;
+		  vlib_set_next_frame_buffer (vm, node, next0, bi0);
+		  break;
+
+		case 2:
+		  /* A A B */
+		  to_next -= 1;
+		  n_left_to_next += 1;
+		  vlib_set_next_frame_buffer (vm, node, next1, bi1);
+		  break;
+
+		case 3:
+		  /* A B B or A B C */
+		  to_next -= 2;
+		  n_left_to_next += 2;
+		  vlib_set_next_frame_buffer (vm, node, next0, bi0);
+		  vlib_set_next_frame_buffer (vm, node, next1, bi1);
+		  if (next0 == next1)
+		    {
+		      vlib_put_next_frame (vm, node, next_index,
+					   n_left_to_next);
+		      next_index = next1;
+		      vlib_get_next_frame (vm, node, next_index, to_next,
+					   n_left_to_next);
+		    }
+		}
+	    }
+	}
+
+      while (n_left_from > 0 && n_left_to_next > 0)
+	{
+	  u32 bi0;
+	  vlib_buffer_t *b0;
+	  snap_header_t *h0;
+	  snap_protocol_info_t *pi0;
+	  u8 next0, is_ethernet0, len0;
+	  u32 oui0;
+
+	  bi0 = from[0];
+	  to_next[0] = bi0;
+	  from += 1;
+	  to_next += 1;
+	  n_left_from -= 1;
+	  n_left_to_next -= 1;
+
+	  b0 = vlib_get_buffer (vm, bi0);
+
+	  h0 = (void *) (b0->data + b0->current_data);
+
+	  oui0 = snap_header_get_oui (h0);
+
+	  is_ethernet0 = oui0 == IEEE_OUI_ethernet;
+
+	  len0 = sizeof (h0[0]) - (is_ethernet0 ? sizeof (h0->protocol) : 0);
+
+	  b0->current_data += len0;
+
+	  b0->current_length -= len0;
+
+	  pi0 = snap_get_protocol_info (sm, h0);
+
+	  next0 = pi0 ? pi0->next_index : SNAP_INPUT_NEXT_DROP;
+
+	  next0 = is_ethernet0 ? SNAP_INPUT_NEXT_ETHERNET_TYPE : next0;
+
+	  /* In case of error. */
+	  b0->error = node->errors[SNAP_ERROR_UNKNOWN_PROTOCOL];
+
+	  /* Sent packet to wrong next? */
+	  if (PREDICT_FALSE (next0 != next_index))
+	    {
+	      /* Return old frame; remove incorrectly enqueued packet. */
+	      vlib_put_next_frame (vm, node, next_index, n_left_to_next + 1);
+
+	      /* Send to correct next. */
+	      next_index = next0;
+	      vlib_get_next_frame (vm, node, next_index,
+				   to_next, n_left_to_next);
+
+	      to_next[0] = bi0;
+	      to_next += 1;
+	      n_left_to_next -= 1;
+	    }
+	}
+
+      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+    }
+
+  return from_frame->n_vectors;
+}
+
+static char *snap_error_strings[] = {
+#define _(f,s) s,
+  foreach_snap_error
+#undef _
+};
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (snap_input_node) = {
+  .function = snap_input,
+  .name = "snap-input",
+  /* Takes a vector of packets. */
+  .vector_size = sizeof (u32),
+
+  .n_errors = SNAP_N_ERROR,
+  .error_strings = snap_error_strings,
+
+  .n_next_nodes = SNAP_INPUT_N_NEXT,
+  .next_nodes = {
+    [SNAP_INPUT_NEXT_DROP] = "error-drop",
+    [SNAP_INPUT_NEXT_PUNT] = "error-punt",
+    [SNAP_INPUT_NEXT_ETHERNET_TYPE] = "ethernet-input-type",
+  },
+
+  .format_buffer = format_snap_header_with_length,
+  .format_trace = format_snap_input_trace,
+  .unformat_buffer = unformat_snap_header,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+snap_input_init (vlib_main_t * vm)
+{
+  {
+    clib_error_t *error = vlib_call_init_function (vm, snap_init);
+    if (error)
+      clib_error_report (error);
+  }
+
+  snap_setup_node (vm, snap_input_node.index);
+
+  llc_register_input_protocol (vm, LLC_PROTOCOL_snap, snap_input_node.index);
+
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (snap_input_init);
+
+void
+snap_register_input_protocol (vlib_main_t * vm,
+			      char *name,
+			      u32 ieee_oui, u16 protocol, u32 node_index)
+{
+  snap_main_t *sm = &snap_main;
+  snap_protocol_info_t *pi;
+  snap_header_t h;
+  snap_oui_and_protocol_t key;
+
+  {
+    clib_error_t *error = vlib_call_init_function (vm, snap_input_init);
+    if (error)
+      clib_error_report (error);
+  }
+
+  h.protocol = clib_host_to_net_u16 (protocol);
+  h.oui[0] = (ieee_oui >> 16) & 0xff;
+  h.oui[1] = (ieee_oui >> 8) & 0xff;
+  h.oui[2] = (ieee_oui >> 0) & 0xff;
+  pi = snap_get_protocol_info (sm, &h);
+  if (pi)
+    return;
+
+  vec_add2 (sm->protocols, pi, 1);
+
+  pi->name = format (0, "%s", name);
+  pi->node_index = node_index;
+  pi->next_index = vlib_node_add_next (vm, snap_input_node.index, node_index);
+
+  key.oui = ieee_oui;
+  key.protocol = clib_host_to_net_u16 (protocol);
+
+  mhash_set (&sm->protocol_hash, &key, pi - sm->protocols, /* old_value */ 0);
+  hash_set_mem (sm->protocol_info_by_name, name, pi - sm->protocols);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */