Revert "ipsec: VPP-1316 calculate IP/TCP/UDP inner checksums"

This reverts commit a98346f664aae148d26a8e158008b773d73db96f.

Change-Id: Iee5b3a5ddff0e8fd3a30fe5973cee24de434fe12
Signed-off-by: Ole Troan <ot@cisco.com>

1 files changed, 172 insertions, 0 deletions

diff --git a/src/vnet/ipsec/ipsec_if_out.c b/src/vnet/ipsec/ipsec_if_out.c
new file mode 100644
index 00000000000..cab6ff3a278
--- /dev/null
+++ b/src/vnet/ipsec/ipsec_if_out.c
@@ -0,0 +1,172 @@
+/*
+ * ipsec_if_out.c : IPSec interface output node
+ *
+ * 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.
+ */
+
+#include <vnet/vnet.h>
+#include <vnet/api_errno.h>
+#include <vnet/ip/ip.h>
+
+#include <vnet/ipsec/ipsec.h>
+
+/* Statistics (not really errors) */
+#define foreach_ipsec_if_output_error    \
+_(TX, "good packets transmitted")
+
+static char *ipsec_if_output_error_strings[] = {
+#define _(sym,string) string,
+  foreach_ipsec_if_output_error
+#undef _
+};
+
+typedef enum
+{
+#define _(sym,str) IPSEC_IF_OUTPUT_ERROR_##sym,
+  foreach_ipsec_if_output_error
+#undef _
+    IPSEC_IF_OUTPUT_N_ERROR,
+} ipsec_if_output_error_t;
+
+
+typedef struct
+{
+  u32 spi;
+  u32 seq;
+} ipsec_if_output_trace_t;
+
+u8 *
+format_ipsec_if_output_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 *);
+  ipsec_if_output_trace_t *t = va_arg (*args, ipsec_if_output_trace_t *);
+
+  s = format (s, "IPSec: spi %u seq %u", t->spi, t->seq);
+  return s;
+}
+
+static uword
+ipsec_if_output_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
+			 vlib_frame_t * from_frame)
+{
+  ipsec_main_t *im = &ipsec_main;
+  vnet_main_t *vnm = im->vnet_main;
+  vnet_interface_main_t *vim = &vnm->interface_main;
+  u32 *from, *to_next = 0, next_index;
+  u32 n_left_from, sw_if_index0, last_sw_if_index = ~0;
+  u32 thread_index = vlib_get_thread_index ();
+  u32 n_bytes = 0, n_packets = 0;
+
+  from = vlib_frame_vector_args (from_frame);
+  n_left_from = from_frame->n_vectors;
+  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 > 0 && n_left_to_next > 0)
+	{
+	  u32 bi0, next0, len0;
+	  vlib_buffer_t *b0;
+	  ipsec_tunnel_if_t *t0;
+	  vnet_hw_interface_t *hi0;
+
+	  bi0 = to_next[0] = from[0];
+	  from += 1;
+	  n_left_from -= 1;
+	  to_next += 1;
+	  n_left_to_next -= 1;
+	  b0 = vlib_get_buffer (vm, bi0);
+	  sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
+	  hi0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
+	  t0 = pool_elt_at_index (im->tunnel_interfaces, hi0->dev_instance);
+	  vnet_buffer (b0)->ipsec.sad_index = t0->output_sa_index;
+	  next0 = im->esp_encrypt_next_index;
+
+	  len0 = vlib_buffer_length_in_chain (vm, b0);
+
+	  if (PREDICT_TRUE (sw_if_index0 == last_sw_if_index))
+	    {
+	      n_packets++;
+	      n_bytes += len0;
+	    }
+	  else
+	    {
+	      vlib_increment_combined_counter (vim->combined_sw_if_counters +
+					       VNET_INTERFACE_COUNTER_TX,
+					       thread_index, sw_if_index0,
+					       n_packets, n_bytes);
+	      last_sw_if_index = sw_if_index0;
+	      n_packets = 1;
+	      n_bytes = len0;
+	    }
+
+	  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+	    {
+	      ipsec_if_output_trace_t *tr =
+		vlib_add_trace (vm, node, b0, sizeof (*tr));
+	      ipsec_sa_t *sa0 =
+		pool_elt_at_index (im->sad, t0->output_sa_index);
+	      tr->spi = sa0->spi;
+	      tr->seq = sa0->seq;
+	    }
+
+	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+					   n_left_to_next, bi0, next0);
+	}
+      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+    }
+
+  if (last_sw_if_index != ~0)
+    {
+      vlib_increment_combined_counter (vim->combined_sw_if_counters +
+				       VNET_INTERFACE_COUNTER_TX,
+				       thread_index,
+				       last_sw_if_index, n_packets, n_bytes);
+    }
+
+  vlib_node_increment_counter (vm, ipsec_if_output_node.index,
+			       IPSEC_IF_OUTPUT_ERROR_TX,
+			       from_frame->n_vectors);
+
+  return from_frame->n_vectors;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ipsec_if_output_node) = {
+  .function = ipsec_if_output_node_fn,
+  .name = "ipsec-if-output",
+  .vector_size = sizeof (u32),
+  .format_trace = format_ipsec_if_output_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_errors = ARRAY_LEN(ipsec_if_output_error_strings),
+  .error_strings = ipsec_if_output_error_strings,
+
+  .sibling_of = "ipsec-output-ip4",
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (ipsec_if_output_node, ipsec_if_output_node_fn)
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */