src/vnet/ip/ip6_forward.h - fdio/vpp - Gitiles

 /*
  * 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.
  */
 /*
  * ip/ip6_forward.h: IP v6 forwarding
  *
  * Copyright (c) 2008 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.
  */

 #ifndef __included_ip6_forward_h__
 #define __included_ip6_forward_h__

 #include <vnet/fib/ip6_fib.h>
 #include <vnet/dpo/load_balance_map.h>

 /**
  * @file
  * @brief IPv6 Forwarding.
  *
  * This file contains the source code for IPv6 forwarding.
  */


 always_inline uword
 ip6_lookup_inline (vlib_main_t * vm,
 		   vlib_node_runtime_t * node, vlib_frame_t * frame)
 {
   ip6_main_t *im = &ip6_main;
   vlib_combined_counter_main_t *cm = &load_balance_main.lbm_to_counters;
   u32 n_left_from, n_left_to_next, *from, *to_next;
   ip_lookup_next_t next;
   u32 thread_index = vlib_get_thread_index ();

   from = vlib_frame_vector_args (frame);
   n_left_from = frame->n_vectors;
   next = node->cached_next_index;

   while (n_left_from > 0)
     {
       vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);

       while (n_left_from >= 4 && n_left_to_next >= 2)
 	{
 	  vlib_buffer_t *p0, *p1;
 	  u32 pi0, pi1, lbi0, lbi1, wrong_next;
 	  ip_lookup_next_t next0, next1;
 	  ip6_header_t *ip0, *ip1;
 	  ip6_address_t *dst_addr0, *dst_addr1;
 	  u32 fib_index0, fib_index1;
 	  u32 flow_hash_config0, flow_hash_config1;
 	  const dpo_id_t *dpo0, *dpo1;
 	  const load_balance_t *lb0, *lb1;

 	  /* 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, sizeof (ip0[0]), LOAD);
 	    CLIB_PREFETCH (p3->data, sizeof (ip0[0]), LOAD);
 	  }

 	  pi0 = to_next[0] = from[0];
 	  pi1 = to_next[1] = from[1];

 	  p0 = vlib_get_buffer (vm, pi0);
 	  p1 = vlib_get_buffer (vm, pi1);

 	  ip0 = vlib_buffer_get_current (p0);
 	  ip1 = vlib_buffer_get_current (p1);

 	  dst_addr0 = &ip0->dst_address;
 	  dst_addr1 = &ip1->dst_address;

 	  fib_index0 =
 	    vec_elt (im->fib_index_by_sw_if_index,
 		     vnet_buffer (p0)->sw_if_index[VLIB_RX]);
 	  fib_index1 =
 	    vec_elt (im->fib_index_by_sw_if_index,
 		     vnet_buffer (p1)->sw_if_index[VLIB_RX]);

 	  fib_index0 = (vnet_buffer (p0)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
 	    fib_index0 : vnet_buffer (p0)->sw_if_index[VLIB_TX];
 	  fib_index1 = (vnet_buffer (p1)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
 	    fib_index1 : vnet_buffer (p1)->sw_if_index[VLIB_TX];

 	  lbi0 = ip6_fib_table_fwding_lookup (im, fib_index0, dst_addr0);
 	  lbi1 = ip6_fib_table_fwding_lookup (im, fib_index1, dst_addr1);

 	  lb0 = load_balance_get (lbi0);
 	  lb1 = load_balance_get (lbi1);
 	  ASSERT (lb0->lb_n_buckets > 0);
 	  ASSERT (lb1->lb_n_buckets > 0);
 	  ASSERT (is_pow2 (lb0->lb_n_buckets));
 	  ASSERT (is_pow2 (lb1->lb_n_buckets));

 	  vnet_buffer (p0)->ip.flow_hash = vnet_buffer (p1)->ip.flow_hash = 0;

 	  if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
 	    {
 	      flow_hash_config0 = lb0->lb_hash_config;
 	      vnet_buffer (p0)->ip.flow_hash =
 		ip6_compute_flow_hash (ip0, flow_hash_config0);
 	      dpo0 =
 		load_balance_get_fwd_bucket (lb0,
 					     (vnet_buffer (p0)->ip.flow_hash &
 					      (lb0->lb_n_buckets_minus_1)));
 	    }
 	  else
 	    {
 	      dpo0 = load_balance_get_bucket_i (lb0, 0);
 	    }
 	  if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
 	    {
 	      flow_hash_config1 = lb1->lb_hash_config;
 	      vnet_buffer (p1)->ip.flow_hash =
 		ip6_compute_flow_hash (ip1, flow_hash_config1);
 	      dpo1 =
 		load_balance_get_fwd_bucket (lb1,
 					     (vnet_buffer (p1)->ip.flow_hash &
 					      (lb1->lb_n_buckets_minus_1)));
 	    }
 	  else
 	    {
 	      dpo1 = load_balance_get_bucket_i (lb1, 0);
 	    }
 	  next0 = dpo0->dpoi_next_node;
 	  next1 = dpo1->dpoi_next_node;

 	  /* Only process the HBH Option Header if explicitly configured to do so */
 	  if (PREDICT_FALSE
 	      (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
 	    {
 	      next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
 		(ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
 	    }
 	  if (PREDICT_FALSE
 	      (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
 	    {
 	      next1 = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
 		(ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next1;
 	    }
 	  vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
 	  vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;

 	  vlib_increment_combined_counter
 	    (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
 	  vlib_increment_combined_counter
 	    (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, p1));

 	  from += 2;
 	  to_next += 2;
 	  n_left_to_next -= 2;
 	  n_left_from -= 2;

 	  wrong_next = (next0 != next) + 2 * (next1 != next);
 	  if (PREDICT_FALSE (wrong_next != 0))
 	    {
 	      switch (wrong_next)
 		{
 		case 1:
 		  /* A B A */
 		  to_next[-2] = pi1;
 		  to_next -= 1;
 		  n_left_to_next += 1;
 		  vlib_set_next_frame_buffer (vm, node, next0, pi0);
 		  break;

 		case 2:
 		  /* A A B */
 		  to_next -= 1;
 		  n_left_to_next += 1;
 		  vlib_set_next_frame_buffer (vm, node, next1, pi1);
 		  break;

 		case 3:
 		  /* A B C */
 		  to_next -= 2;
 		  n_left_to_next += 2;
 		  vlib_set_next_frame_buffer (vm, node, next0, pi0);
 		  vlib_set_next_frame_buffer (vm, node, next1, pi1);
 		  if (next0 == next1)
 		    {
 		      /* A B B */
 		      vlib_put_next_frame (vm, node, next, n_left_to_next);
 		      next = next1;
 		      vlib_get_next_frame (vm, node, next, to_next,
 					   n_left_to_next);
 		    }
 		}
 	    }
 	}

       while (n_left_from > 0 && n_left_to_next > 0)
 	{
 	  vlib_buffer_t *p0;
 	  ip6_header_t *ip0;
 	  u32 pi0, lbi0;
 	  ip_lookup_next_t next0;
 	  load_balance_t *lb0;
 	  ip6_address_t *dst_addr0;
 	  u32 fib_index0, flow_hash_config0;
 	  const dpo_id_t *dpo0;

 	  pi0 = from[0];
 	  to_next[0] = pi0;

 	  p0 = vlib_get_buffer (vm, pi0);

 	  ip0 = vlib_buffer_get_current (p0);

 	  dst_addr0 = &ip0->dst_address;

 	  fib_index0 =
 	    vec_elt (im->fib_index_by_sw_if_index,
 		     vnet_buffer (p0)->sw_if_index[VLIB_RX]);
 	  fib_index0 =
 	    (vnet_buffer (p0)->sw_if_index[VLIB_TX] ==
 	     (u32) ~ 0) ? fib_index0 : vnet_buffer (p0)->sw_if_index[VLIB_TX];

 	  lbi0 = ip6_fib_table_fwding_lookup (im, fib_index0, dst_addr0);

 	  lb0 = load_balance_get (lbi0);
 	  flow_hash_config0 = lb0->lb_hash_config;

 	  vnet_buffer (p0)->ip.flow_hash = 0;
 	  ASSERT (lb0->lb_n_buckets > 0);
 	  ASSERT (is_pow2 (lb0->lb_n_buckets));

 	  if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
 	    {
 	      flow_hash_config0 = lb0->lb_hash_config;
 	      vnet_buffer (p0)->ip.flow_hash =
 		ip6_compute_flow_hash (ip0, flow_hash_config0);
 	      dpo0 =
 		load_balance_get_fwd_bucket (lb0,
 					     (vnet_buffer (p0)->ip.flow_hash &
 					      (lb0->lb_n_buckets_minus_1)));
 	    }
 	  else
 	    {
 	      dpo0 = load_balance_get_bucket_i (lb0, 0);
 	    }

 	  dpo0 = load_balance_get_bucket_i (lb0,
 					    (vnet_buffer (p0)->ip.flow_hash &
 					     lb0->lb_n_buckets_minus_1));
 	  next0 = dpo0->dpoi_next_node;

 	  /* Only process the HBH Option Header if explicitly configured to do so */
 	  if (PREDICT_FALSE
 	      (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
 	    {
 	      next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
 		(ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
 	    }
 	  vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;

 	  vlib_increment_combined_counter
 	    (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));

 	  from += 1;
 	  to_next += 1;
 	  n_left_to_next -= 1;
 	  n_left_from -= 1;

 	  if (PREDICT_FALSE (next0 != next))
 	    {
 	      n_left_to_next += 1;
 	      vlib_put_next_frame (vm, node, next, n_left_to_next);
 	      next = next0;
 	      vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
 	      to_next[0] = pi0;
 	      to_next += 1;
 	      n_left_to_next -= 1;
 	    }
 	}

       vlib_put_next_frame (vm, node, next, n_left_to_next);
     }

   if (node->flags & VLIB_NODE_FLAG_TRACE)
     ip6_forward_next_trace (vm, node, frame, VLIB_TX);

   return frame->n_vectors;
 }

 #endif /*__included_ip6_forward_h__ */

 /*
  * fd.io coding-style-patch-verification: ON
  *
  * Local Variables:
  * eval: (c-set-style "gnu")
  * End:
  */
	/*
	* 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.
	*/
	/*
	* ip/ip6_forward.h: IP v6 forwarding
	*
	* Copyright (c) 2008 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.
	*/

	#ifndef __included_ip6_forward_h__
	#define __included_ip6_forward_h__

	#include <vnet/fib/ip6_fib.h>
	#include <vnet/dpo/load_balance_map.h>

	/**
	* @file
	* @brief IPv6 Forwarding.
	*
	* This file contains the source code for IPv6 forwarding.
	*/


	always_inline uword
	ip6_lookup_inline (vlib_main_t * vm,
	vlib_node_runtime_t * node, vlib_frame_t * frame)
	{
	ip6_main_t *im = &ip6_main;
	vlib_combined_counter_main_t *cm = &load_balance_main.lbm_to_counters;
	u32 n_left_from, n_left_to_next, from, to_next;
	ip_lookup_next_t next;
	u32 thread_index = vlib_get_thread_index ();

	from = vlib_frame_vector_args (frame);
	n_left_from = frame->n_vectors;
	next = node->cached_next_index;

	while (n_left_from > 0)
	{
	vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);

	while (n_left_from >= 4 && n_left_to_next >= 2)
	{
	vlib_buffer_t p0, p1;
	u32 pi0, pi1, lbi0, lbi1, wrong_next;
	ip_lookup_next_t next0, next1;
	ip6_header_t ip0, ip1;
	ip6_address_t dst_addr0, dst_addr1;
	u32 fib_index0, fib_index1;
	u32 flow_hash_config0, flow_hash_config1;
	const dpo_id_t dpo0, dpo1;
	const load_balance_t lb0, lb1;

	/* 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, sizeof (ip0[0]), LOAD);
	CLIB_PREFETCH (p3->data, sizeof (ip0[0]), LOAD);
	}

	pi0 = to_next[0] = from[0];
	pi1 = to_next[1] = from[1];

	p0 = vlib_get_buffer (vm, pi0);
	p1 = vlib_get_buffer (vm, pi1);

	ip0 = vlib_buffer_get_current (p0);
	ip1 = vlib_buffer_get_current (p1);

	dst_addr0 = &ip0->dst_address;
	dst_addr1 = &ip1->dst_address;

	fib_index0 =
	vec_elt (im->fib_index_by_sw_if_index,
	vnet_buffer (p0)->sw_if_index[VLIB_RX]);
	fib_index1 =
	vec_elt (im->fib_index_by_sw_if_index,
	vnet_buffer (p1)->sw_if_index[VLIB_RX]);

	fib_index0 = (vnet_buffer (p0)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
	fib_index0 : vnet_buffer (p0)->sw_if_index[VLIB_TX];
	fib_index1 = (vnet_buffer (p1)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
	fib_index1 : vnet_buffer (p1)->sw_if_index[VLIB_TX];

	lbi0 = ip6_fib_table_fwding_lookup (im, fib_index0, dst_addr0);
	lbi1 = ip6_fib_table_fwding_lookup (im, fib_index1, dst_addr1);

	lb0 = load_balance_get (lbi0);
	lb1 = load_balance_get (lbi1);
	ASSERT (lb0->lb_n_buckets > 0);
	ASSERT (lb1->lb_n_buckets > 0);
	ASSERT (is_pow2 (lb0->lb_n_buckets));
	ASSERT (is_pow2 (lb1->lb_n_buckets));

	vnet_buffer (p0)->ip.flow_hash = vnet_buffer (p1)->ip.flow_hash = 0;

	if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
	{
	flow_hash_config0 = lb0->lb_hash_config;
	vnet_buffer (p0)->ip.flow_hash =
	ip6_compute_flow_hash (ip0, flow_hash_config0);
	dpo0 =
	load_balance_get_fwd_bucket (lb0,
	(vnet_buffer (p0)->ip.flow_hash &
	(lb0->lb_n_buckets_minus_1)));
	}
	else
	{
	dpo0 = load_balance_get_bucket_i (lb0, 0);
	}
	if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
	{
	flow_hash_config1 = lb1->lb_hash_config;
	vnet_buffer (p1)->ip.flow_hash =
	ip6_compute_flow_hash (ip1, flow_hash_config1);
	dpo1 =
	load_balance_get_fwd_bucket (lb1,
	(vnet_buffer (p1)->ip.flow_hash &
	(lb1->lb_n_buckets_minus_1)));
	}
	else
	{
	dpo1 = load_balance_get_bucket_i (lb1, 0);
	}
	next0 = dpo0->dpoi_next_node;
	next1 = dpo1->dpoi_next_node;

	/* Only process the HBH Option Header if explicitly configured to do so */
	if (PREDICT_FALSE
	(ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
	{
	next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
	(ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
	}
	if (PREDICT_FALSE
	(ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
	{
	next1 = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
	(ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next1;
	}
	vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
	vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;

	vlib_increment_combined_counter
	(cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
	vlib_increment_combined_counter
	(cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, p1));

	from += 2;
	to_next += 2;
	n_left_to_next -= 2;
	n_left_from -= 2;

	wrong_next = (next0 != next) + 2 * (next1 != next);
	if (PREDICT_FALSE (wrong_next != 0))
	{
	switch (wrong_next)
	{
	case 1:
	/* A B A */
	to_next[-2] = pi1;
	to_next -= 1;
	n_left_to_next += 1;
	vlib_set_next_frame_buffer (vm, node, next0, pi0);
	break;

	case 2:
	/* A A B */
	to_next -= 1;
	n_left_to_next += 1;
	vlib_set_next_frame_buffer (vm, node, next1, pi1);
	break;

	case 3:
	/* A B C */
	to_next -= 2;
	n_left_to_next += 2;
	vlib_set_next_frame_buffer (vm, node, next0, pi0);
	vlib_set_next_frame_buffer (vm, node, next1, pi1);
	if (next0 == next1)
	{
	/* A B B */
	vlib_put_next_frame (vm, node, next, n_left_to_next);
	next = next1;
	vlib_get_next_frame (vm, node, next, to_next,
	n_left_to_next);
	}
	}
	}
	}

	while (n_left_from > 0 && n_left_to_next > 0)
	{
	vlib_buffer_t *p0;
	ip6_header_t *ip0;
	u32 pi0, lbi0;
	ip_lookup_next_t next0;
	load_balance_t *lb0;
	ip6_address_t *dst_addr0;
	u32 fib_index0, flow_hash_config0;
	const dpo_id_t *dpo0;

	pi0 = from[0];
	to_next[0] = pi0;

	p0 = vlib_get_buffer (vm, pi0);

	ip0 = vlib_buffer_get_current (p0);

	dst_addr0 = &ip0->dst_address;

	fib_index0 =
	vec_elt (im->fib_index_by_sw_if_index,
	vnet_buffer (p0)->sw_if_index[VLIB_RX]);
	fib_index0 =
	(vnet_buffer (p0)->sw_if_index[VLIB_TX] ==
	(u32) ~ 0) ? fib_index0 : vnet_buffer (p0)->sw_if_index[VLIB_TX];

	lbi0 = ip6_fib_table_fwding_lookup (im, fib_index0, dst_addr0);

	lb0 = load_balance_get (lbi0);
	flow_hash_config0 = lb0->lb_hash_config;

	vnet_buffer (p0)->ip.flow_hash = 0;
	ASSERT (lb0->lb_n_buckets > 0);
	ASSERT (is_pow2 (lb0->lb_n_buckets));

	if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
	{
	flow_hash_config0 = lb0->lb_hash_config;
	vnet_buffer (p0)->ip.flow_hash =
	ip6_compute_flow_hash (ip0, flow_hash_config0);
	dpo0 =
	load_balance_get_fwd_bucket (lb0,
	(vnet_buffer (p0)->ip.flow_hash &
	(lb0->lb_n_buckets_minus_1)));
	}
	else
	{
	dpo0 = load_balance_get_bucket_i (lb0, 0);
	}

	dpo0 = load_balance_get_bucket_i (lb0,
	(vnet_buffer (p0)->ip.flow_hash &
	lb0->lb_n_buckets_minus_1));
	next0 = dpo0->dpoi_next_node;

	/* Only process the HBH Option Header if explicitly configured to do so */
	if (PREDICT_FALSE
	(ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
	{
	next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
	(ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
	}
	vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;

	vlib_increment_combined_counter
	(cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));

	from += 1;
	to_next += 1;
	n_left_to_next -= 1;
	n_left_from -= 1;

	if (PREDICT_FALSE (next0 != next))
	{
	n_left_to_next += 1;
	vlib_put_next_frame (vm, node, next, n_left_to_next);
	next = next0;
	vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
	to_next[0] = pi0;
	to_next += 1;
	n_left_to_next -= 1;
	}
	}

	vlib_put_next_frame (vm, node, next, n_left_to_next);
	}

	if (node->flags & VLIB_NODE_FLAG_TRACE)
	ip6_forward_next_trace (vm, node, frame, VLIB_TX);

	return frame->n_vectors;
	}

	#endif /__included_ip6_forward_h__ /

	/*
	* fd.io coding-style-patch-verification: ON
	*
	* Local Variables:
	* eval: (c-set-style "gnu")
	* End:
	*/