nsh: migrate old MUTIARCH macros to VLIB_NODE_FN

Change-Id: Iafe8b3a38f2a7d7571e60db91608d8130bb07cb3
Signed-off-by: Filip Tehlar <ftehlar@cisco.com>

1 files changed, 982 insertions, 0 deletions

diff --git a/src/plugins/nsh/nsh_node.c b/src/plugins/nsh/nsh_node.c
new file mode 100644
index 00000000000..5e2af68e417
--- /dev/null
+++ b/src/plugins/nsh/nsh_node.c
@@ -0,0 +1,982 @@
+/*
+ * nsh_node.c - nsh nodes
+ *
+ * Copyright (c) 2013 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/plugin/plugin.h>
+#include <nsh/nsh.h>
+
+always_inline void
+nsh_md2_encap (vlib_buffer_t * b, nsh_base_header_t * hdr,
+	       nsh_entry_t * nsh_entry)
+{
+  nsh_main_t *nm = &nsh_main;
+  nsh_base_header_t *nsh_base;
+  nsh_tlv_header_t *opt0;
+  nsh_tlv_header_t *limit0;
+  nsh_tlv_header_t *nsh_md2;
+  nsh_option_map_t *nsh_option;
+  u8 old_option_size = 0;
+  u8 new_option_size = 0;
+
+  /* Populate the NSH Header */
+  opt0 = (nsh_tlv_header_t *) (nsh_entry->tlvs_data);
+  limit0 = (nsh_tlv_header_t *) (nsh_entry->tlvs_data + nsh_entry->tlvs_len);
+
+  nsh_md2 = (nsh_tlv_header_t *) ((u8 *) hdr /*nsh_entry->rewrite */  +
+				  sizeof (nsh_base_header_t));
+  nsh_entry->rewrite_size = sizeof (nsh_base_header_t);
+
+  /* Scan the set of variable metadata, process ones that we understand */
+  while (opt0 < limit0)
+    {
+      old_option_size = sizeof (nsh_tlv_header_t) + opt0->length;
+      /* round to 4-byte */
+      old_option_size = ((old_option_size + 3) >> 2) << 2;
+
+      nsh_option = nsh_md2_lookup_option (opt0->class, opt0->type);
+      if (nsh_option == NULL)
+	{
+	  goto next_tlv_md2;
+	}
+
+      if (nm->options[nsh_option->option_id])
+	{
+	  if ((*nm->options[nsh_option->option_id]) (b, nsh_md2))
+	    {
+	      goto next_tlv_md2;
+	    }
+
+	  /* option length may be varied */
+	  new_option_size = sizeof (nsh_tlv_header_t) + nsh_md2->length;
+	  /* round to 4-byte */
+	  new_option_size = ((new_option_size + 3) >> 2) << 2;
+	  nsh_entry->rewrite_size += new_option_size;
+
+	  nsh_md2 = (nsh_tlv_header_t *) (((u8 *) nsh_md2) + new_option_size);
+	  opt0 = (nsh_tlv_header_t *) (((u8 *) opt0) + old_option_size);
+
+	}
+      else
+	{
+	next_tlv_md2:
+	  opt0 = (nsh_tlv_header_t *) (((u8 *) opt0) + old_option_size);
+	}
+    }
+
+  /* update nsh header's length */
+  nsh_base = (nsh_base_header_t *) nsh_entry->rewrite;
+  nsh_base->length = (nsh_base->length & NSH_TTL_L2_MASK) |
+    ((nsh_entry->rewrite_size >> 2) & NSH_LEN_MASK);
+  return;
+}
+
+always_inline void
+nsh_md2_swap (vlib_buffer_t * b,
+	      nsh_base_header_t * hdr,
+	      u32 header_len,
+	      nsh_entry_t * nsh_entry, u32 * next, u32 drop_node_val)
+{
+  nsh_main_t *nm = &nsh_main;
+  nsh_base_header_t *nsh_base;
+  nsh_tlv_header_t *opt0;
+  nsh_tlv_header_t *limit0;
+  nsh_tlv_header_t *nsh_md2;
+  nsh_option_map_t *nsh_option;
+  u8 old_option_size = 0;
+  u8 new_option_size = 0;
+
+  /* Populate the NSH Header */
+  opt0 = (nsh_md2_data_t *) (hdr + 1);
+  limit0 = (nsh_md2_data_t *) ((u8 *) hdr + header_len);
+
+  nsh_md2 =
+    (nsh_tlv_header_t *) (nsh_entry->rewrite + sizeof (nsh_base_header_t));
+  nsh_entry->rewrite_size = sizeof (nsh_base_header_t);
+
+  /* Scan the set of variable metadata, process ones that we understand */
+  while (opt0 < limit0)
+    {
+      old_option_size = sizeof (nsh_tlv_header_t) + opt0->length;
+      /* round to 4-byte */
+      old_option_size = ((old_option_size + 3) >> 2) << 2;
+
+      nsh_option = nsh_md2_lookup_option (opt0->class, opt0->type);
+      if (nsh_option == NULL)
+	{
+	  goto next_tlv_md2;
+	}
+
+      if (nm->swap_options[nsh_option->option_id])
+	{
+	  if ((*nm->swap_options[nsh_option->option_id]) (b, opt0, nsh_md2))
+	    {
+	      goto next_tlv_md2;
+	    }
+
+	  /* option length may be varied */
+	  new_option_size = sizeof (nsh_tlv_header_t) + nsh_md2->length;
+	  /* round to 4-byte */
+	  new_option_size = ((new_option_size + 3) >> 2) << 2;
+	  nsh_entry->rewrite_size += new_option_size;
+	  nsh_md2 = (nsh_tlv_header_t *) (((u8 *) nsh_md2) + new_option_size);
+
+	  opt0 = (nsh_tlv_header_t *) (((u8 *) opt0) + old_option_size);
+
+	}
+      else
+	{
+	next_tlv_md2:
+	  opt0 = (nsh_tlv_header_t *) (((u8 *) opt0) + old_option_size);
+	}
+    }
+
+  /* update nsh header's length */
+  nsh_base = (nsh_base_header_t *) nsh_entry->rewrite;
+  nsh_base->length = (nsh_base->length & NSH_TTL_L2_MASK) |
+    ((nsh_entry->rewrite_size >> 2) & NSH_LEN_MASK);
+  return;
+}
+
+always_inline void
+nsh_md2_decap (vlib_buffer_t * b,
+	       nsh_base_header_t * hdr,
+	       u32 * header_len, u32 * next, u32 drop_node_val)
+{
+  nsh_main_t *nm = &nsh_main;
+  nsh_md2_data_t *opt0;
+  nsh_md2_data_t *limit0;
+  nsh_option_map_t *nsh_option;
+  u8 option_len = 0;
+
+  /* Populate the NSH Header */
+  opt0 = (nsh_md2_data_t *) (hdr + 1);
+  limit0 = (nsh_md2_data_t *) ((u8 *) hdr + *header_len);
+
+  /* Scan the set of variable metadata, process ones that we understand */
+  while (opt0 < limit0)
+    {
+      nsh_option = nsh_md2_lookup_option (opt0->class, opt0->type);
+      if (nsh_option == NULL)
+	{
+	  *next = drop_node_val;
+	  return;
+	}
+
+      if (nm->pop_options[nsh_option->option_id])
+	{
+	  if ((*nm->pop_options[nsh_option->option_id]) (b, opt0))
+	    {
+	      *next = drop_node_val;
+	      return;
+	    }
+	}
+      /* round to 4-byte */
+      option_len = ((opt0->length + 3) >> 2) << 2;
+      opt0 =
+	(nsh_md2_data_t *) (((u8 *) opt0) + sizeof (nsh_md2_data_t) +
+			    option_len);
+      *next =
+	(nm->decap_v4_next_override) ? (nm->decap_v4_next_override) : (*next);
+      *header_len = (nm->decap_v4_next_override) ? 0 : (*header_len);
+    }
+
+  return;
+}
+
+static uword
+nsh_input_map (vlib_main_t * vm,
+	       vlib_node_runtime_t * node,
+	       vlib_frame_t * from_frame, u32 node_type)
+{
+  u32 n_left_from, next_index, *from, *to_next;
+  nsh_main_t *nm = &nsh_main;
+
+  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 >= 4 && n_left_to_next >= 2)
+	{
+	  u32 bi0, bi1;
+	  vlib_buffer_t *b0, *b1;
+	  u32 next0 = NSH_NODE_NEXT_DROP, next1 = NSH_NODE_NEXT_DROP;
+	  uword *entry0, *entry1;
+	  nsh_base_header_t *hdr0 = 0, *hdr1 = 0;
+	  u32 header_len0 = 0, header_len1 = 0;
+	  u32 nsp_nsi0, nsp_nsi1;
+	  u32 ttl0, ttl1;
+	  u32 error0, error1;
+	  nsh_map_t *map0 = 0, *map1 = 0;
+	  nsh_entry_t *nsh_entry0 = 0, *nsh_entry1 = 0;
+	  nsh_base_header_t *encap_hdr0 = 0, *encap_hdr1 = 0;
+	  u32 encap_hdr_len0 = 0, encap_hdr_len1 = 0;
+	  nsh_proxy_session_by_key_t key0, key1;
+	  uword *p0, *p1;
+	  nsh_proxy_session_t *proxy0, *proxy1;
+	  u32 sw_if_index0 = 0, sw_if_index1 = 0;
+	  ethernet_header_t dummy_eth0, dummy_eth1;
+
+	  /* Prefetch next iteration. */
+	  {
+	    vlib_buffer_t *p2, *p3;
+
+	    p2 = vlib_get_buffer (vm, from[2]);
+	    p3 = vlib_get_buffer (vm, from[3]);
+
+	    vlib_prefetch_buffer_header (p2, LOAD);
+	    vlib_prefetch_buffer_header (p3, LOAD);
+
+	    CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
+	    CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
+	  }
+
+	  bi0 = from[0];
+	  bi1 = from[1];
+	  to_next[0] = bi0;
+	  to_next[1] = bi1;
+	  from += 2;
+	  to_next += 2;
+	  n_left_from -= 2;
+	  n_left_to_next -= 2;
+
+	  error0 = 0;
+	  error1 = 0;
+
+	  b0 = vlib_get_buffer (vm, bi0);
+	  b1 = vlib_get_buffer (vm, bi1);
+	  hdr0 = vlib_buffer_get_current (b0);
+	  hdr1 = vlib_buffer_get_current (b1);
+
+	  /* Process packet 0 */
+	  if (node_type == NSH_INPUT_TYPE)
+	    {
+	      nsp_nsi0 = hdr0->nsp_nsi;
+	      header_len0 = (hdr0->length & NSH_LEN_MASK) * 4;
+	      ttl0 = (hdr0->ver_o_c & NSH_TTL_H4_MASK) << 2 |
+		(hdr0->length & NSH_TTL_L2_MASK) >> 6;
+	      ttl0 = ttl0 - 1;
+	      if (PREDICT_FALSE (ttl0 == 0))
+		{
+		  error0 = NSH_NODE_ERROR_INVALID_TTL;
+		  goto trace0;
+		}
+	    }
+	  else if (node_type == NSH_CLASSIFIER_TYPE)
+	    {
+	      nsp_nsi0 =
+		clib_host_to_net_u32 (vnet_buffer (b0)->
+				      l2_classify.opaque_index);
+	    }
+	  else if (node_type == NSH_AWARE_VNF_PROXY_TYPE)
+	    {
+	      /* Push dummy Eth header */
+	      char dummy_dst_address[6] =
+		{ 0x11, 0x22, 0x33, 0x44, 0x55, 0x66 };
+	      char dummy_src_address[6] =
+		{ 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc };
+	      clib_memcpy_fast (dummy_eth0.dst_address, dummy_dst_address, 6);
+	      clib_memcpy_fast (dummy_eth0.src_address, dummy_src_address, 6);
+	      dummy_eth0.type = 0x0800;
+	      vlib_buffer_advance (b0, -(word) sizeof (ethernet_header_t));
+	      hdr0 = vlib_buffer_get_current (b0);
+	      clib_memcpy_fast (hdr0, &dummy_eth0,
+				(word) sizeof (ethernet_header_t));
+
+	      sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
+	      nsp_nsi0 = nm->tunnel_index_by_sw_if_index[sw_if_index0];
+	    }
+	  else
+	    {
+	      clib_memset (&key0, 0, sizeof (key0));
+	      key0.transport_type = NSH_NODE_NEXT_ENCAP_VXLAN4;
+	      key0.transport_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+
+	      p0 = hash_get_mem (nm->nsh_proxy_session_by_key, &key0);
+	      if (PREDICT_FALSE (p0 == 0))
+		{
+		  error0 = NSH_NODE_ERROR_NO_PROXY;
+		  goto trace0;
+		}
+
+	      proxy0 = pool_elt_at_index (nm->nsh_proxy_sessions, p0[0]);
+	      if (PREDICT_FALSE (proxy0 == 0))
+		{
+		  error0 = NSH_NODE_ERROR_NO_PROXY;
+		  goto trace0;
+		}
+	      nsp_nsi0 = proxy0->nsp_nsi;
+	    }
+
+	  entry0 = hash_get_mem (nm->nsh_mapping_by_key, &nsp_nsi0);
+	  if (PREDICT_FALSE (entry0 == 0))
+	    {
+	      error0 = NSH_NODE_ERROR_NO_MAPPING;
+	      goto trace0;
+	    }
+
+	  /* Entry should point to a mapping ... */
+	  map0 = pool_elt_at_index (nm->nsh_mappings, entry0[0]);
+	  if (PREDICT_FALSE (map0 == 0))
+	    {
+	      error0 = NSH_NODE_ERROR_NO_MAPPING;
+	      goto trace0;
+	    }
+
+	  /* set up things for next node to transmit ie which node to handle it and where */
+	  next0 = map0->next_node;
+	  vnet_buffer (b0)->sw_if_index[VLIB_TX] = map0->sw_if_index;
+	  vnet_buffer (b0)->ip.adj_index[VLIB_TX] = map0->adj_index;
+
+	  if (PREDICT_FALSE (map0->nsh_action == NSH_ACTION_POP))
+	    {
+	      /* Manipulate MD2 */
+	      if (PREDICT_FALSE (hdr0->md_type == 2))
+		{
+		  nsh_md2_decap (b0, hdr0, &header_len0, &next0,
+				 NSH_NODE_NEXT_DROP);
+		  if (PREDICT_FALSE (next0 == NSH_NODE_NEXT_DROP))
+		    {
+		      error0 = NSH_NODE_ERROR_INVALID_OPTIONS;
+		      goto trace0;
+		    }
+		  vnet_buffer (b0)->sw_if_index[VLIB_RX] =
+		    map0->rx_sw_if_index;
+		}
+
+	      /* Pop NSH header */
+	      vlib_buffer_advance (b0, (word) header_len0);
+	      goto trace0;
+	    }
+
+	  entry0 = hash_get_mem (nm->nsh_entry_by_key, &map0->mapped_nsp_nsi);
+	  if (PREDICT_FALSE (entry0 == 0))
+	    {
+	      error0 = NSH_NODE_ERROR_NO_ENTRY;
+	      goto trace0;
+	    }
+
+	  nsh_entry0 =
+	    (nsh_entry_t *) pool_elt_at_index (nm->nsh_entries, entry0[0]);
+	  encap_hdr0 = (nsh_base_header_t *) (nsh_entry0->rewrite);
+	  /* rewrite_size should equal to (encap_hdr0->length * 4) */
+	  encap_hdr_len0 = nsh_entry0->rewrite_size;
+
+	  if (PREDICT_TRUE (map0->nsh_action == NSH_ACTION_SWAP))
+	    {
+	      /* Manipulate MD2 */
+	      if (PREDICT_FALSE (hdr0->md_type == 2))
+		{
+		  nsh_md2_swap (b0, hdr0, header_len0, nsh_entry0,
+				&next0, NSH_NODE_NEXT_DROP);
+		  if (PREDICT_FALSE (next0 == NSH_NODE_NEXT_DROP))
+		    {
+		      error0 = NSH_NODE_ERROR_INVALID_OPTIONS;
+		      goto trace0;
+		    }
+		}
+
+	      /* Pop old NSH header */
+	      vlib_buffer_advance (b0, (word) header_len0);
+
+	      /* After processing, md2's length may be varied */
+	      encap_hdr_len0 = nsh_entry0->rewrite_size;
+	      /* Push new NSH header */
+	      vlib_buffer_advance (b0, -(word) encap_hdr_len0);
+	      hdr0 = vlib_buffer_get_current (b0);
+	      clib_memcpy_fast (hdr0, encap_hdr0, (word) encap_hdr_len0);
+
+	      goto trace0;
+	    }
+
+	  if (PREDICT_TRUE (map0->nsh_action == NSH_ACTION_PUSH))
+	    {
+	      /* After processing, md2's length may be varied */
+	      encap_hdr_len0 = nsh_entry0->rewrite_size;
+	      /* Push new NSH header */
+	      vlib_buffer_advance (b0, -(word) encap_hdr_len0);
+	      hdr0 = vlib_buffer_get_current (b0);
+	      clib_memcpy_fast (hdr0, encap_hdr0, (word) encap_hdr_len0);
+
+	      /* Manipulate MD2 */
+	      if (PREDICT_FALSE (nsh_entry0->nsh_base.md_type == 2))
+		{
+		  nsh_md2_encap (b0, hdr0, nsh_entry0);
+		}
+
+	    }
+
+	trace0:
+	  b0->error = error0 ? node->errors[error0] : 0;
+
+	  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+	    {
+	      nsh_input_trace_t *tr =
+		vlib_add_trace (vm, node, b0, sizeof (*tr));
+	      clib_memcpy_fast (&(tr->trace_data), hdr0,
+				((hdr0->length & NSH_LEN_MASK) * 4));
+	    }
+
+	  /* Process packet 1 */
+	  if (node_type == NSH_INPUT_TYPE)
+	    {
+	      nsp_nsi1 = hdr1->nsp_nsi;
+	      header_len1 = (hdr1->length & NSH_LEN_MASK) * 4;
+	      ttl1 = (hdr1->ver_o_c & NSH_TTL_H4_MASK) << 2 |
+		(hdr1->length & NSH_TTL_L2_MASK) >> 6;
+	      ttl1 = ttl1 - 1;
+	      if (PREDICT_FALSE (ttl1 == 0))
+		{
+		  error1 = NSH_NODE_ERROR_INVALID_TTL;
+		  goto trace1;
+		}
+	    }
+	  else if (node_type == NSH_CLASSIFIER_TYPE)
+	    {
+	      nsp_nsi1 =
+		clib_host_to_net_u32 (vnet_buffer (b1)->
+				      l2_classify.opaque_index);
+	    }
+	  else if (node_type == NSH_AWARE_VNF_PROXY_TYPE)
+	    {
+	      /* Push dummy Eth header */
+	      char dummy_dst_address[6] =
+		{ 0x11, 0x22, 0x33, 0x44, 0x55, 0x66 };
+	      char dummy_src_address[6] =
+		{ 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc };
+	      clib_memcpy_fast (dummy_eth1.dst_address, dummy_dst_address, 6);
+	      clib_memcpy_fast (dummy_eth1.src_address, dummy_src_address, 6);
+	      dummy_eth1.type = 0x0800;
+	      vlib_buffer_advance (b1, -(word) sizeof (ethernet_header_t));
+	      hdr1 = vlib_buffer_get_current (b1);
+	      clib_memcpy_fast (hdr1, &dummy_eth1,
+				(word) sizeof (ethernet_header_t));
+
+	      sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_TX];
+	      nsp_nsi1 = nm->tunnel_index_by_sw_if_index[sw_if_index1];
+	    }
+	  else
+	    {
+	      clib_memset (&key1, 0, sizeof (key1));
+	      key1.transport_type = NSH_NODE_NEXT_ENCAP_VXLAN4;
+	      key1.transport_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
+
+	      p1 = hash_get_mem (nm->nsh_proxy_session_by_key, &key1);
+	      if (PREDICT_FALSE (p1 == 0))
+		{
+		  error1 = NSH_NODE_ERROR_NO_PROXY;
+		  goto trace1;
+		}
+
+	      proxy1 = pool_elt_at_index (nm->nsh_proxy_sessions, p1[0]);
+	      if (PREDICT_FALSE (proxy1 == 0))
+		{
+		  error1 = NSH_NODE_ERROR_NO_PROXY;
+		  goto trace1;
+		}
+	      nsp_nsi1 = proxy1->nsp_nsi;
+	    }
+
+	  entry1 = hash_get_mem (nm->nsh_mapping_by_key, &nsp_nsi1);
+	  if (PREDICT_FALSE (entry1 == 0))
+	    {
+	      error1 = NSH_NODE_ERROR_NO_MAPPING;
+	      goto trace1;
+	    }
+
+	  /* Entry should point to a mapping ... */
+	  map1 = pool_elt_at_index (nm->nsh_mappings, entry1[0]);
+	  if (PREDICT_FALSE (map1 == 0))
+	    {
+	      error1 = NSH_NODE_ERROR_NO_MAPPING;
+	      goto trace1;
+	    }
+
+	  /* set up things for next node to transmit ie which node to handle it and where */
+	  next1 = map1->next_node;
+	  vnet_buffer (b1)->sw_if_index[VLIB_TX] = map1->sw_if_index;
+	  vnet_buffer (b1)->ip.adj_index[VLIB_TX] = map1->adj_index;
+
+	  if (PREDICT_FALSE (map1->nsh_action == NSH_ACTION_POP))
+	    {
+	      /* Manipulate MD2 */
+	      if (PREDICT_FALSE (hdr1->md_type == 2))
+		{
+		  nsh_md2_decap (b1, hdr1, &header_len1, &next1,
+				 NSH_NODE_NEXT_DROP);
+		  if (PREDICT_FALSE (next1 == NSH_NODE_NEXT_DROP))
+		    {
+		      error1 = NSH_NODE_ERROR_INVALID_OPTIONS;
+		      goto trace1;
+		    }
+		  vnet_buffer (b1)->sw_if_index[VLIB_RX] =
+		    map1->rx_sw_if_index;
+		}
+
+	      /* Pop NSH header */
+	      vlib_buffer_advance (b1, (word) header_len1);
+	      goto trace1;
+	    }
+
+	  entry1 = hash_get_mem (nm->nsh_entry_by_key, &map1->mapped_nsp_nsi);
+	  if (PREDICT_FALSE (entry1 == 0))
+	    {
+	      error1 = NSH_NODE_ERROR_NO_ENTRY;
+	      goto trace1;
+	    }
+
+	  nsh_entry1 =
+	    (nsh_entry_t *) pool_elt_at_index (nm->nsh_entries, entry1[0]);
+	  encap_hdr1 = (nsh_base_header_t *) (nsh_entry1->rewrite);
+	  /* rewrite_size should equal to (encap_hdr0->length * 4) */
+	  encap_hdr_len1 = nsh_entry1->rewrite_size;
+
+	  if (PREDICT_TRUE (map1->nsh_action == NSH_ACTION_SWAP))
+	    {
+	      /* Manipulate MD2 */
+	      if (PREDICT_FALSE (hdr1->md_type == 2))
+		{
+		  nsh_md2_swap (b1, hdr1, header_len1, nsh_entry1,
+				&next1, NSH_NODE_NEXT_DROP);
+		  if (PREDICT_FALSE (next1 == NSH_NODE_NEXT_DROP))
+		    {
+		      error1 = NSH_NODE_ERROR_INVALID_OPTIONS;
+		      goto trace1;
+		    }
+		}
+
+	      /* Pop old NSH header */
+	      vlib_buffer_advance (b1, (word) header_len1);
+
+	      /* After processing, md2's length may be varied */
+	      encap_hdr_len1 = nsh_entry1->rewrite_size;
+	      /* Push new NSH header */
+	      vlib_buffer_advance (b1, -(word) encap_hdr_len1);
+	      hdr1 = vlib_buffer_get_current (b1);
+	      clib_memcpy_fast (hdr1, encap_hdr1, (word) encap_hdr_len1);
+
+	      goto trace1;
+	    }
+
+	  if (PREDICT_FALSE (map1->nsh_action == NSH_ACTION_PUSH))
+	    {
+	      /* After processing, md2's length may be varied */
+	      encap_hdr_len1 = nsh_entry1->rewrite_size;
+	      /* Push new NSH header */
+	      vlib_buffer_advance (b1, -(word) encap_hdr_len1);
+	      hdr1 = vlib_buffer_get_current (b1);
+	      clib_memcpy_fast (hdr1, encap_hdr1, (word) encap_hdr_len1);
+
+	      /* Manipulate MD2 */
+	      if (PREDICT_FALSE (nsh_entry1->nsh_base.md_type == 2))
+		{
+		  nsh_md2_encap (b1, hdr1, nsh_entry1);
+		}
+
+	    }
+
+	trace1:
+	  b1->error = error1 ? node->errors[error1] : 0;
+
+	  if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
+	    {
+	      nsh_input_trace_t *tr =
+		vlib_add_trace (vm, node, b1, sizeof (*tr));
+	      clib_memcpy_fast (&(tr->trace_data), hdr1,
+				((hdr1->length & NSH_LEN_MASK) * 4));
+	    }
+
+	  vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
+					   n_left_to_next, bi0, bi1, next0,
+					   next1);
+
+	}
+
+      while (n_left_from > 0 && n_left_to_next > 0)
+	{
+	  u32 bi0 = 0;
+	  vlib_buffer_t *b0 = NULL;
+	  u32 next0 = NSH_NODE_NEXT_DROP;
+	  uword *entry0;
+	  nsh_base_header_t *hdr0 = 0;
+	  u32 header_len0 = 0;
+	  u32 nsp_nsi0;
+	  u32 ttl0;
+	  u32 error0;
+	  nsh_map_t *map0 = 0;
+	  nsh_entry_t *nsh_entry0 = 0;
+	  nsh_base_header_t *encap_hdr0 = 0;
+	  u32 encap_hdr_len0 = 0;
+	  nsh_proxy_session_by_key_t key0;
+	  uword *p0;
+	  nsh_proxy_session_t *proxy0 = 0;
+	  u32 sw_if_index0 = 0;
+	  ethernet_header_t dummy_eth0;
+
+	  bi0 = from[0];
+	  to_next[0] = bi0;
+	  from += 1;
+	  to_next += 1;
+	  n_left_from -= 1;
+	  n_left_to_next -= 1;
+	  error0 = 0;
+
+	  b0 = vlib_get_buffer (vm, bi0);
+	  hdr0 = vlib_buffer_get_current (b0);
+
+	  if (node_type == NSH_INPUT_TYPE)
+	    {
+	      nsp_nsi0 = hdr0->nsp_nsi;
+	      header_len0 = (hdr0->length & NSH_LEN_MASK) * 4;
+	      ttl0 = (hdr0->ver_o_c & NSH_TTL_H4_MASK) << 2 |
+		(hdr0->length & NSH_TTL_L2_MASK) >> 6;
+	      ttl0 = ttl0 - 1;
+	      if (PREDICT_FALSE (ttl0 == 0))
+		{
+		  error0 = NSH_NODE_ERROR_INVALID_TTL;
+		  goto trace00;
+		}
+	    }
+	  else if (node_type == NSH_CLASSIFIER_TYPE)
+	    {
+	      nsp_nsi0 =
+		clib_host_to_net_u32 (vnet_buffer (b0)->
+				      l2_classify.opaque_index);
+	    }
+	  else if (node_type == NSH_AWARE_VNF_PROXY_TYPE)
+	    {
+	      /* Push dummy Eth header */
+	      char dummy_dst_address[6] =
+		{ 0x11, 0x22, 0x33, 0x44, 0x55, 0x66 };
+	      char dummy_src_address[6] =
+		{ 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc };
+	      clib_memcpy_fast (dummy_eth0.dst_address, dummy_dst_address, 6);
+	      clib_memcpy_fast (dummy_eth0.src_address, dummy_src_address, 6);
+	      dummy_eth0.type = 0x0800;
+	      vlib_buffer_advance (b0, -(word) sizeof (ethernet_header_t));
+	      hdr0 = vlib_buffer_get_current (b0);
+	      clib_memcpy_fast (hdr0, &dummy_eth0,
+				(word) sizeof (ethernet_header_t));
+
+	      sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
+	      nsp_nsi0 = nm->tunnel_index_by_sw_if_index[sw_if_index0];
+	    }
+	  else
+	    {
+	      clib_memset (&key0, 0, sizeof (key0));
+	      key0.transport_type = NSH_NODE_NEXT_ENCAP_VXLAN4;
+	      key0.transport_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+
+	      p0 = hash_get_mem (nm->nsh_proxy_session_by_key, &key0);
+	      if (PREDICT_FALSE (p0 == 0))
+		{
+		  error0 = NSH_NODE_ERROR_NO_PROXY;
+		  goto trace00;
+		}
+
+	      proxy0 = pool_elt_at_index (nm->nsh_proxy_sessions, p0[0]);
+	      if (PREDICT_FALSE (proxy0 == 0))
+		{
+		  error0 = NSH_NODE_ERROR_NO_PROXY;
+		  goto trace00;
+		}
+	      nsp_nsi0 = proxy0->nsp_nsi;
+	    }
+
+	  entry0 = hash_get_mem (nm->nsh_mapping_by_key, &nsp_nsi0);
+
+	  if (PREDICT_FALSE (entry0 == 0))
+	    {
+	      error0 = NSH_NODE_ERROR_NO_MAPPING;
+	      goto trace00;
+	    }
+
+	  /* Entry should point to a mapping ... */
+	  map0 = pool_elt_at_index (nm->nsh_mappings, entry0[0]);
+
+	  if (PREDICT_FALSE (map0 == 0))
+	    {
+	      error0 = NSH_NODE_ERROR_NO_MAPPING;
+	      goto trace00;
+	    }
+
+	  /* set up things for next node to transmit ie which node to handle it and where */
+	  next0 = map0->next_node;
+	  vnet_buffer (b0)->sw_if_index[VLIB_TX] = map0->sw_if_index;
+	  vnet_buffer (b0)->ip.adj_index[VLIB_TX] = map0->adj_index;
+	  vnet_buffer (b0)->sw_if_index[VLIB_RX] = map0->nsh_sw_if;
+
+	  if (PREDICT_FALSE (map0->nsh_action == NSH_ACTION_POP))
+	    {
+	      /* Manipulate MD2 */
+	      if (PREDICT_FALSE (hdr0->md_type == 2))
+		{
+		  nsh_md2_decap (b0, hdr0, &header_len0, &next0,
+				 NSH_NODE_NEXT_DROP);
+		  if (PREDICT_FALSE (next0 == NSH_NODE_NEXT_DROP))
+		    {
+		      error0 = NSH_NODE_ERROR_INVALID_OPTIONS;
+		      goto trace00;
+		    }
+		  vnet_buffer (b0)->sw_if_index[VLIB_RX] =
+		    map0->rx_sw_if_index;
+		}
+
+	      /* Pop NSH header */
+	      vlib_buffer_advance (b0, (word) header_len0);
+	      goto trace00;
+	    }
+
+	  entry0 = hash_get_mem (nm->nsh_entry_by_key, &map0->mapped_nsp_nsi);
+	  if (PREDICT_FALSE (entry0 == 0))
+	    {
+	      error0 = NSH_NODE_ERROR_NO_ENTRY;
+	      goto trace00;
+	    }
+
+	  nsh_entry0 =
+	    (nsh_entry_t *) pool_elt_at_index (nm->nsh_entries, entry0[0]);
+	  encap_hdr0 = (nsh_base_header_t *) (nsh_entry0->rewrite);
+	  /* rewrite_size should equal to (encap_hdr0->length * 4) */
+	  encap_hdr_len0 = nsh_entry0->rewrite_size;
+
+	  if (PREDICT_TRUE (map0->nsh_action == NSH_ACTION_SWAP))
+	    {
+	      /* Manipulate MD2 */
+	      if (PREDICT_FALSE (hdr0->md_type == 2))
+		{
+		  nsh_md2_swap (b0, hdr0, header_len0, nsh_entry0,
+				&next0, NSH_NODE_NEXT_DROP);
+		  if (PREDICT_FALSE (next0 == NSH_NODE_NEXT_DROP))
+		    {
+		      error0 = NSH_NODE_ERROR_INVALID_OPTIONS;
+		      goto trace00;
+		    }
+		}
+
+	      /* Pop old NSH header */
+	      vlib_buffer_advance (b0, (word) header_len0);
+
+	      /* After processing, md2's length may be varied */
+	      encap_hdr_len0 = nsh_entry0->rewrite_size;
+	      /* Push new NSH header */
+	      vlib_buffer_advance (b0, -(word) encap_hdr_len0);
+	      hdr0 = vlib_buffer_get_current (b0);
+	      clib_memcpy_fast (hdr0, encap_hdr0, (word) encap_hdr_len0);
+
+	      goto trace00;
+	    }
+
+	  if (PREDICT_TRUE (map0->nsh_action == NSH_ACTION_PUSH))
+	    {
+	      /* After processing, md2's length may be varied */
+	      encap_hdr_len0 = nsh_entry0->rewrite_size;
+	      /* Push new NSH header */
+	      vlib_buffer_advance (b0, -(word) encap_hdr_len0);
+	      hdr0 = vlib_buffer_get_current (b0);
+	      clib_memcpy_fast (hdr0, encap_hdr0, (word) encap_hdr_len0);
+	      /* Manipulate MD2 */
+	      if (PREDICT_FALSE (nsh_entry0->nsh_base.md_type == 2))
+		{
+		  nsh_md2_encap (b0, hdr0, nsh_entry0);
+		}
+
+	    }
+
+	trace00:b0->error = error0 ? node->errors[error0] : 0;
+
+	  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+	    {
+	      nsh_input_trace_t *tr =
+		vlib_add_trace (vm, node, b0, sizeof (*tr));
+	      clib_memcpy_fast (&(tr->trace_data[0]), hdr0,
+				((hdr0->length & NSH_LEN_MASK) * 4));
+	    }
+
+	  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);
+
+    }
+
+  return from_frame->n_vectors;
+}
+
+/**
+ * @brief Graph processing dispatch function for NSH Input
+ *
+ * @node nsh_input
+ * @param *vm
+ * @param *node
+ * @param *from_frame
+ *
+ * @return from_frame->n_vectors
+ *
+ */
+VLIB_NODE_FN (nsh_input) (vlib_main_t * vm, vlib_node_runtime_t * node,
+			  vlib_frame_t * from_frame)
+{
+  return nsh_input_map (vm, node, from_frame, NSH_INPUT_TYPE);
+}
+
+/**
+ * @brief Graph processing dispatch function for NSH-Proxy
+ *
+ * @node nsh_proxy
+ * @param *vm
+ * @param *node
+ * @param *from_frame
+ *
+ * @return from_frame->n_vectors
+ *
+ */
+VLIB_NODE_FN (nsh_proxy) (vlib_main_t * vm, vlib_node_runtime_t * node,
+			  vlib_frame_t * from_frame)
+{
+  return nsh_input_map (vm, node, from_frame, NSH_PROXY_TYPE);
+}
+
+/**
+ * @brief Graph processing dispatch function for NSH Classifier
+ *
+ * @node nsh_classifier
+ * @param *vm
+ * @param *node
+ * @param *from_frame
+ *
+ * @return from_frame->n_vectors
+ *
+ */
+VLIB_NODE_FN (nsh_classifier) (vlib_main_t * vm, vlib_node_runtime_t * node,
+			       vlib_frame_t * from_frame)
+{
+  return nsh_input_map (vm, node, from_frame, NSH_CLASSIFIER_TYPE);
+}
+
+/**
+ * @brief Graph processing dispatch function for NSH-AWARE-VNF-PROXY
+ *
+ * @node nsh_aware_vnf_proxy
+ * @param *vm
+ * @param *node
+ * @param *from_frame
+ *
+ * @return from_frame->n_vectors
+ *
+ */
+VLIB_NODE_FN (nsh_aware_vnf_proxy) (vlib_main_t * vm,
+				    vlib_node_runtime_t * node,
+				    vlib_frame_t * from_frame)
+{
+  return nsh_input_map (vm, node, from_frame, NSH_AWARE_VNF_PROXY_TYPE);
+}
+
+static char *nsh_node_error_strings[] = {
+#define _(sym,string) string,
+  foreach_nsh_node_error
+#undef _
+};
+
+/* *INDENT-OFF* */
+
+/* register nsh-input node */
+VLIB_REGISTER_NODE (nsh_input_node) = {
+  .name = "nsh-input",
+  .vector_size = sizeof (u32),
+  .format_trace = format_nsh_node_map_trace,
+  .format_buffer = format_nsh_header,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+  .n_errors = ARRAY_LEN (nsh_node_error_strings),
+  .error_strings = nsh_node_error_strings,
+  .n_next_nodes = NSH_NODE_N_NEXT,
+  .next_nodes = {
+#define _(s,n) [NSH_NODE_NEXT_##s] = n,
+    foreach_nsh_node_next
+#undef _
+  },
+};
+
+/* register nsh-proxy node */
+VLIB_REGISTER_NODE (nsh_proxy_node) =
+{
+  .name = "nsh-proxy",
+  .vector_size = sizeof (u32),
+  .format_trace = format_nsh_node_map_trace,
+  .format_buffer = format_nsh_header,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+  .n_errors = ARRAY_LEN (nsh_node_error_strings),
+  .error_strings = nsh_node_error_strings,
+  .n_next_nodes = NSH_NODE_N_NEXT,
+  .next_nodes = {
+#define _(s,n) [NSH_NODE_NEXT_##s] = n,
+    foreach_nsh_node_next
+#undef _
+  },
+};
+
+/* register nsh-classifier node */
+VLIB_REGISTER_NODE (nsh_classifier_node) =
+{
+  .name = "nsh-classifier",
+  .vector_size = sizeof (u32),
+  .format_trace = format_nsh_node_map_trace,
+  .format_buffer = format_nsh_header,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+  .n_errors = ARRAY_LEN (nsh_node_error_strings),
+  .error_strings = nsh_node_error_strings,
+  .n_next_nodes = NSH_NODE_N_NEXT,
+  .next_nodes = {
+#define _(s,n) [NSH_NODE_NEXT_##s] = n,
+    foreach_nsh_node_next
+#undef _
+  },
+};
+
+/* register nsh-aware-vnf-proxy node */
+VLIB_REGISTER_NODE (nsh_aware_vnf_proxy_node) =
+{
+  .name = "nsh-aware-vnf-proxy",
+  .vector_size = sizeof (u32),
+  .format_trace = format_nsh_node_map_trace,
+  .format_buffer = format_nsh_header,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+  .n_errors = ARRAY_LEN (nsh_node_error_strings),
+  .error_strings = nsh_node_error_strings,
+  .n_next_nodes = NSH_NODE_N_NEXT,
+  .next_nodes = {
+#define _(s,n) [NSH_NODE_NEXT_##s] = n,
+    foreach_nsh_node_next
+#undef _
+  },
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */