src/vnet/udp/udp_encap_node.c - fdio/vpp - Gitiles

 /*
  * Copyright (c) 2017 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/udp/udp_encap.h>

 typedef struct udp4_encap_trace_t_
 {
   udp_header_t udp;
   ip4_header_t ip;
 } udp4_encap_trace_t;

 typedef struct udp6_encap_trace_t_
 {
   udp_header_t udp;
   ip6_header_t ip;
 } udp6_encap_trace_t;

 static u8 *
 format_udp4_encap_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 *);
   udp4_encap_trace_t *t;

   t = va_arg (*args, udp4_encap_trace_t *);

   s = format (s, "%U\n  %U",
 	      format_ip4_header, &t->ip, sizeof (t->ip),
 	      format_udp_header, &t->udp, sizeof (t->udp));
   return (s);
 }

 static u8 *
 format_udp6_encap_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 *);
   udp6_encap_trace_t *t;

   t = va_arg (*args, udp6_encap_trace_t *);

   s = format (s, "%U\n  %U",
 	      format_ip6_header, &t->ip, sizeof (t->ip),
 	      format_udp_header, &t->udp, sizeof (t->udp));
   return (s);
 }

 always_inline uword
 udp_encap_inline (vlib_main_t * vm,
 		  vlib_node_runtime_t * node,
 		  vlib_frame_t * frame, int is_encap_v6)
 {
   u32 *from = vlib_frame_vector_args (frame);
   u32 n_left_from, n_left_to_next, *to_next, next_index;

   n_left_from = frame->n_vectors;
   next_index = node->cached_next_index;

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

       while (n_left_from >= 4 && n_left_to_next >= 2)
 	{
 	  vlib_buffer_t *b0, *b1;
 	  udp_encap_t *ue0, *ue1;
 	  u32 bi0, next0, uei0;
 	  u32 bi1, next1, uei1;

 	  /* 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, STORE);
 	    vlib_prefetch_buffer_header (p3, STORE);
 	  }

 	  bi0 = to_next[0] = from[0];
 	  bi1 = to_next[1] = from[1];

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

 	  b0 = vlib_get_buffer (vm, bi0);
 	  b1 = vlib_get_buffer (vm, bi1);

 	  uei0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
 	  uei1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];

 	  /* Rewrite packet header and updates lengths. */
 	  ue0 = udp_encap_get (uei0);
 	  ue1 = udp_encap_get (uei1);

 	  /* Paint */
 	  if (is_encap_v6)
 	    {
 	      const u8 n_bytes =
 		sizeof (udp_header_t) + sizeof (ip6_header_t);
 	      ip_udp_encap_two (vm, b0, b1, (u8 *) & ue0->ue_hdrs,
 				(u8 *) & ue1->ue_hdrs, n_bytes, 0);
 	      if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
 		{
 		  udp6_encap_trace_t *tr =
 		    vlib_add_trace (vm, node, b0, sizeof (*tr));
 		  tr->udp = ue0->ue_hdrs.ip6.ue_udp;
 		  tr->ip = ue0->ue_hdrs.ip6.ue_ip6;
 		}
 	      if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
 		{
 		  udp6_encap_trace_t *tr =
 		    vlib_add_trace (vm, node, b1, sizeof (*tr));
 		  tr->udp = ue1->ue_hdrs.ip6.ue_udp;
 		  tr->ip = ue1->ue_hdrs.ip6.ue_ip6;
 		}
 	    }
 	  else
 	    {
 	      const u8 n_bytes =
 		sizeof (udp_header_t) + sizeof (ip4_header_t);

 	      ip_udp_encap_two (vm, b0, b1,
 				(u8 *) & ue0->ue_hdrs,
 				(u8 *) & ue1->ue_hdrs, n_bytes, 1);

 	      if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
 		{
 		  udp4_encap_trace_t *tr =
 		    vlib_add_trace (vm, node, b0, sizeof (*tr));
 		  tr->udp = ue0->ue_hdrs.ip4.ue_udp;
 		  tr->ip = ue0->ue_hdrs.ip4.ue_ip4;
 		}
 	      if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
 		{
 		  udp4_encap_trace_t *tr =
 		    vlib_add_trace (vm, node, b1, sizeof (*tr));
 		  tr->udp = ue1->ue_hdrs.ip4.ue_udp;
 		  tr->ip = ue1->ue_hdrs.ip4.ue_ip4;
 		}
 	    }

 	  next0 = ue0->ue_dpo.dpoi_next_node;
 	  next1 = ue1->ue_dpo.dpoi_next_node;
 	  vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ue0->ue_dpo.dpoi_index;
 	  vnet_buffer (b1)->ip.adj_index[VLIB_TX] = ue1->ue_dpo.dpoi_index;

 	  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, next0, uei0;
 	  vlib_buffer_t *b0;
 	  udp_encap_t *ue0;

 	  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);

 	  uei0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];

 	  /* Rewrite packet header and updates lengths. */
 	  ue0 = udp_encap_get (uei0);

 	  /* Paint */
 	  if (is_encap_v6)
 	    {
 	      const u8 n_bytes =
 		sizeof (udp_header_t) + sizeof (ip6_header_t);
 	      ip_udp_encap_one (vm, b0, (u8 *) & ue0->ue_hdrs.ip6, n_bytes,
 				0);

 	      if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
 		{
 		  udp6_encap_trace_t *tr =
 		    vlib_add_trace (vm, node, b0, sizeof (*tr));
 		  tr->udp = ue0->ue_hdrs.ip6.ue_udp;
 		  tr->ip = ue0->ue_hdrs.ip6.ue_ip6;
 		}
 	    }
 	  else
 	    {
 	      const u8 n_bytes =
 		sizeof (udp_header_t) + sizeof (ip4_header_t);

 	      ip_udp_encap_one (vm, b0, (u8 *) & ue0->ue_hdrs.ip4, n_bytes,
 				1);

 	      if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
 		{
 		  udp4_encap_trace_t *tr =
 		    vlib_add_trace (vm, node, b0, sizeof (*tr));
 		  tr->udp = ue0->ue_hdrs.ip4.ue_udp;
 		  tr->ip = ue0->ue_hdrs.ip4.ue_ip4;
 		}
 	    }

 	  next0 = ue0->ue_dpo.dpoi_next_node;
 	  vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ue0->ue_dpo.dpoi_index;

 	  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 frame->n_vectors;
 }

 static uword
 udp4_encap (vlib_main_t * vm,
 	    vlib_node_runtime_t * node, vlib_frame_t * frame)
 {
   return udp_encap_inline (vm, node, frame, 0);
 }

 static uword
 udp6_encap (vlib_main_t * vm,
 	    vlib_node_runtime_t * node, vlib_frame_t * frame)
 {
   return udp_encap_inline (vm, node, frame, 1);
 }

 /* *INDENT-OFF* */
 VLIB_REGISTER_NODE (udp4_encap_node) = {
   .function = udp4_encap,
   .name = "udp4-encap",
   .vector_size = sizeof (u32),

   .format_trace = format_udp4_encap_trace,

   .n_next_nodes = 0,
 };
 VLIB_NODE_FUNCTION_MULTIARCH (udp4_encap_node, udp4_encap);

 VLIB_REGISTER_NODE (udp6_encap_node) = {
   .function = udp6_encap,
   .name = "udp6-encap",
   .vector_size = sizeof (u32),

   .format_trace = format_udp6_encap_trace,

   .n_next_nodes = 0,
 };
 VLIB_NODE_FUNCTION_MULTIARCH (udp6_encap_node, udp6_encap);
 /* *INDENT-ON* */


 /*
  * fd.io coding-style-patch-verification: ON
  *
  * Local Variables:
  * eval: (c-set-style "gnu")
  * End:
  */
	/*
	* Copyright (c) 2017 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/udp/udp_encap.h>

	typedef struct udp4_encap_trace_t_
	{
	udp_header_t udp;
	ip4_header_t ip;
	} udp4_encap_trace_t;

	typedef struct udp6_encap_trace_t_
	{
	udp_header_t udp;
	ip6_header_t ip;
	} udp6_encap_trace_t;

	static u8 *
	format_udp4_encap_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 );
	udp4_encap_trace_t *t;

	t = va_arg (args, udp4_encap_trace_t );

	s = format (s, "%U\n %U",
	format_ip4_header, &t->ip, sizeof (t->ip),
	format_udp_header, &t->udp, sizeof (t->udp));
	return (s);
	}

	static u8 *
	format_udp6_encap_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 );
	udp6_encap_trace_t *t;

	t = va_arg (args, udp6_encap_trace_t );

	s = format (s, "%U\n %U",
	format_ip6_header, &t->ip, sizeof (t->ip),
	format_udp_header, &t->udp, sizeof (t->udp));
	return (s);
	}

	always_inline uword
	udp_encap_inline (vlib_main_t * vm,
	vlib_node_runtime_t * node,
	vlib_frame_t * frame, int is_encap_v6)
	{
	u32 *from = vlib_frame_vector_args (frame);
	u32 n_left_from, n_left_to_next, *to_next, next_index;

	n_left_from = frame->n_vectors;
	next_index = node->cached_next_index;

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

	while (n_left_from >= 4 && n_left_to_next >= 2)
	{
	vlib_buffer_t b0, b1;
	udp_encap_t ue0, ue1;
	u32 bi0, next0, uei0;
	u32 bi1, next1, uei1;

	/* 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, STORE);
	vlib_prefetch_buffer_header (p3, STORE);
	}

	bi0 = to_next[0] = from[0];
	bi1 = to_next[1] = from[1];

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

	b0 = vlib_get_buffer (vm, bi0);
	b1 = vlib_get_buffer (vm, bi1);

	uei0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
	uei1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];

	/* Rewrite packet header and updates lengths. */
	ue0 = udp_encap_get (uei0);
	ue1 = udp_encap_get (uei1);

	/* Paint */
	if (is_encap_v6)
	{
	const u8 n_bytes =
	sizeof (udp_header_t) + sizeof (ip6_header_t);
	ip_udp_encap_two (vm, b0, b1, (u8 *) & ue0->ue_hdrs,
	(u8 *) & ue1->ue_hdrs, n_bytes, 0);
	if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
	{
	udp6_encap_trace_t *tr =
	vlib_add_trace (vm, node, b0, sizeof (*tr));
	tr->udp = ue0->ue_hdrs.ip6.ue_udp;
	tr->ip = ue0->ue_hdrs.ip6.ue_ip6;
	}
	if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
	{
	udp6_encap_trace_t *tr =
	vlib_add_trace (vm, node, b1, sizeof (*tr));
	tr->udp = ue1->ue_hdrs.ip6.ue_udp;
	tr->ip = ue1->ue_hdrs.ip6.ue_ip6;
	}
	}
	else
	{
	const u8 n_bytes =
	sizeof (udp_header_t) + sizeof (ip4_header_t);

	ip_udp_encap_two (vm, b0, b1,
	(u8 *) & ue0->ue_hdrs,
	(u8 *) & ue1->ue_hdrs, n_bytes, 1);

	if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
	{
	udp4_encap_trace_t *tr =
	vlib_add_trace (vm, node, b0, sizeof (*tr));
	tr->udp = ue0->ue_hdrs.ip4.ue_udp;
	tr->ip = ue0->ue_hdrs.ip4.ue_ip4;
	}
	if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
	{
	udp4_encap_trace_t *tr =
	vlib_add_trace (vm, node, b1, sizeof (*tr));
	tr->udp = ue1->ue_hdrs.ip4.ue_udp;
	tr->ip = ue1->ue_hdrs.ip4.ue_ip4;
	}
	}

	next0 = ue0->ue_dpo.dpoi_next_node;
	next1 = ue1->ue_dpo.dpoi_next_node;
	vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ue0->ue_dpo.dpoi_index;
	vnet_buffer (b1)->ip.adj_index[VLIB_TX] = ue1->ue_dpo.dpoi_index;

	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, next0, uei0;
	vlib_buffer_t *b0;
	udp_encap_t *ue0;

	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);

	uei0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];

	/* Rewrite packet header and updates lengths. */
	ue0 = udp_encap_get (uei0);

	/* Paint */
	if (is_encap_v6)
	{
	const u8 n_bytes =
	sizeof (udp_header_t) + sizeof (ip6_header_t);
	ip_udp_encap_one (vm, b0, (u8 *) & ue0->ue_hdrs.ip6, n_bytes,
	0);

	if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
	{
	udp6_encap_trace_t *tr =
	vlib_add_trace (vm, node, b0, sizeof (*tr));
	tr->udp = ue0->ue_hdrs.ip6.ue_udp;
	tr->ip = ue0->ue_hdrs.ip6.ue_ip6;
	}
	}
	else
	{
	const u8 n_bytes =
	sizeof (udp_header_t) + sizeof (ip4_header_t);

	ip_udp_encap_one (vm, b0, (u8 *) & ue0->ue_hdrs.ip4, n_bytes,
	1);

	if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
	{
	udp4_encap_trace_t *tr =
	vlib_add_trace (vm, node, b0, sizeof (*tr));
	tr->udp = ue0->ue_hdrs.ip4.ue_udp;
	tr->ip = ue0->ue_hdrs.ip4.ue_ip4;
	}
	}

	next0 = ue0->ue_dpo.dpoi_next_node;
	vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ue0->ue_dpo.dpoi_index;

	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 frame->n_vectors;
	}

	static uword
	udp4_encap (vlib_main_t * vm,
	vlib_node_runtime_t * node, vlib_frame_t * frame)
	{
	return udp_encap_inline (vm, node, frame, 0);
	}

	static uword
	udp6_encap (vlib_main_t * vm,
	vlib_node_runtime_t * node, vlib_frame_t * frame)
	{
	return udp_encap_inline (vm, node, frame, 1);
	}

	/* INDENT-OFF */
	VLIB_REGISTER_NODE (udp4_encap_node) = {
	.function = udp4_encap,
	.name = "udp4-encap",
	.vector_size = sizeof (u32),

	.format_trace = format_udp4_encap_trace,

	.n_next_nodes = 0,
	};
	VLIB_NODE_FUNCTION_MULTIARCH (udp4_encap_node, udp4_encap);

	VLIB_REGISTER_NODE (udp6_encap_node) = {
	.function = udp6_encap,
	.name = "udp6-encap",
	.vector_size = sizeof (u32),

	.format_trace = format_udp6_encap_trace,

	.n_next_nodes = 0,
	};
	VLIB_NODE_FUNCTION_MULTIARCH (udp6_encap_node, udp6_encap);
	/* INDENT-ON */


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