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authorpmikus <pmikus@cisco.com>2021-06-11 13:06:34 +0000
committerPeter Mikus <pmikus@cisco.com>2021-06-17 13:26:40 +0000
commita275fa0062158d712152f542b7bc9ec40b5c5f31 (patch)
tree7d55c04747fd49f0ac08c9452976088f2df0791f /resources/libraries/robot/ip
parent70766243f6c00c77fedc00d68114c108528950d6 (diff)
Core: Rework CPU allocation
Signed-off-by: pmikus <pmikus@cisco.com> Change-Id: I6826add7b3032041632c3952c45a3c64409400b0
Diffstat (limited to 'resources/libraries/robot/ip')
-rw-r--r--resources/libraries/robot/ip/nat.robot2
1 files changed, 1 insertions, 1 deletions
diff --git a/resources/libraries/robot/ip/nat.robot b/resources/libraries/robot/ip/nat.robot
index 202ade34a5..c33c875389 100644
--- a/resources/libraries/robot/ip/nat.robot
+++ b/resources/libraries/robot/ip/nat.robot
@@ -51,7 +51,7 @@
| | ... | - n_sessions - Expected number of opened sessions.
| |
| | ${max_sessions}= | Compute Max Translations Per Thread
-| | ... | ${n_sessions} | ${thr_count_int}
+| | ... | ${n_sessions} | ${dp_count_int}
| | Enable NAT44 Plugin | ${dut1} | mode=${nat_mode} | sessions=${max_sessions}
| | Configure inside and outside interfaces
| | ... | ${dut1} | ${DUT1_${int}1}[0] | ${DUT1_${int}2}[0]
79'>379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 
/*
 * decap.c : IPSec tunnel decapsulation
 *
 * 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/feature/feature.h>

#include <vnet/ipsec/ipsec.h>
#include <vnet/ipsec/esp.h>
#include <vnet/ipsec/ah.h>
#include <vnet/ipsec/ipsec_io.h>

#define foreach_ipsec_input_error               \
_(RX_PKTS, "IPSEC pkts received")		\
_(RX_MATCH_PKTS, "IPSEC pkts matched")

typedef enum
{
#define _(sym,str) IPSEC_INPUT_ERROR_##sym,
  foreach_ipsec_input_error
#undef _
    IPSEC_INPUT_N_ERROR,
} ipsec_input_error_t;

static char *ipsec_input_error_strings[] = {
#define _(sym,string) string,
  foreach_ipsec_input_error
#undef _
};

typedef struct
{
  ip_protocol_t proto;
  u32 spd;
  u32 policy_index;
  u32 sa_id;
  u32 spi;
  u32 seq;
} ipsec_input_trace_t;

/* packet trace format function */
static u8 *
format_ipsec_input_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_input_trace_t *t = va_arg (*args, ipsec_input_trace_t *);

  s = format (s, "%U: sa_id %u spd %u policy %d spi %u seq %u",
	      format_ip_protocol, t->proto, t->sa_id,
	      t->spd, t->policy_index, t->spi, t->seq);

  return s;
}

always_inline ipsec_policy_t *
ipsec_input_protect_policy_match (ipsec_spd_t * spd, u32 sa, u32 da, u32 spi)
{
  ipsec_main_t *im = &ipsec_main;
  ipsec_policy_t *p;
  ipsec_sa_t *s;
  u32 *i;

  vec_foreach (i, spd->policies[IPSEC_SPD_POLICY_IP4_INBOUND_PROTECT])
  {
    p = pool_elt_at_index (im->policies, *i);
    s = pool_elt_at_index (im->sad, p->sa_index);

    if (spi != s->spi)
      continue;

    if (ipsec_sa_is_set_IS_TUNNEL (s))
      {
	if (da != clib_net_to_host_u32 (s->tunnel_dst_addr.ip4.as_u32))
	  continue;

	if (sa != clib_net_to_host_u32 (s->tunnel_src_addr.ip4.as_u32))
	  continue;

	return p;
      }

    if (da < clib_net_to_host_u32 (p->laddr.start.ip4.as_u32))
      continue;

    if (da > clib_net_to_host_u32 (p->laddr.stop.ip4.as_u32))
      continue;

    if (sa < clib_net_to_host_u32 (p->raddr.start.ip4.as_u32))
      continue;

    if (sa > clib_net_to_host_u32 (p->raddr.stop.ip4.as_u32))
      continue;

    return p;
  }
  return 0;
}

always_inline uword
ip6_addr_match_range (ip6_address_t * a, ip6_address_t * la,
		      ip6_address_t * ua)
{
  if ((memcmp (a->as_u64, la->as_u64, 2 * sizeof (u64)) >= 0) &&
      (memcmp (a->as_u64, ua->as_u64, 2 * sizeof (u64)) <= 0))
    return 1;
  return 0;
}

always_inline ipsec_policy_t *
ipsec6_input_protect_policy_match (ipsec_spd_t * spd,
				   ip6_address_t * sa,
				   ip6_address_t * da, u32 spi)
{
  ipsec_main_t *im = &ipsec_main;
  ipsec_policy_t *p;
  ipsec_sa_t *s;
  u32 *i;

  vec_foreach (i, spd->policies[IPSEC_SPD_POLICY_IP6_INBOUND_PROTECT])
  {
    p = pool_elt_at_index (im->policies, *i);
    s = pool_elt_at_index (im->sad, p->sa_index);

    if (spi != s->spi)
      continue;

    if (ipsec_sa_is_set_IS_TUNNEL (s))
      {
	if (!ip6_address_is_equal (sa, &s->tunnel_src_addr.ip6))
	  continue;

	if (!ip6_address_is_equal (da, &s->tunnel_dst_addr.ip6))
	  continue;

	return p;
      }

    if (!ip6_addr_match_range (sa, &p->raddr.start.ip6, &p->raddr.stop.ip6))
      continue;

    if (!ip6_addr_match_range (da, &p->laddr.start.ip6, &p->laddr.stop.ip6))
      continue;

    return p;
  }
  return 0;
}

static vlib_node_registration_t ipsec4_input_node;

VLIB_NODE_FN (ipsec4_input_node) (vlib_main_t * vm,
				  vlib_node_runtime_t * node,
				  vlib_frame_t * from_frame)
{
  u32 n_left_from, *from, next_index, *to_next, thread_index;
  ipsec_main_t *im = &ipsec_main;
  u32 ipsec_unprocessed = 0;
  u32 ipsec_matched = 0;

  from = vlib_frame_vector_args (from_frame);
  n_left_from = from_frame->n_vectors;
  thread_index = vm->thread_index;

  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, pi0;
	  vlib_buffer_t *b0;
	  ip4_header_t *ip0;
	  esp_header_t *esp0;
	  ah_header_t *ah0;
	  ip4_ipsec_config_t *c0;
	  ipsec_spd_t *spd0;
	  ipsec_policy_t *p0 = 0;

	  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);
	  b0->flags |= VNET_BUFFER_F_IS_IP4;
	  b0->flags &= ~VNET_BUFFER_F_IS_IP6;
	  c0 = vnet_feature_next_with_data (&next0, b0, sizeof (c0[0]));

	  spd0 = pool_elt_at_index (im->spds, c0->spd_index);

	  ip0 = vlib_buffer_get_current (b0);

	  if (PREDICT_TRUE
	      (ip0->protocol == IP_PROTOCOL_IPSEC_ESP
	       || ip0->protocol == IP_PROTOCOL_UDP))
	    {
#if 0
	      clib_warning
		("packet received from %U to %U spi %u size %u spd_id %u",
		 format_ip4_address, ip0->src_address.as_u8,
		 format_ip4_address, ip0->dst_address.as_u8,
		 clib_net_to_host_u32 (esp0->spi),
		 clib_net_to_host_u16 (ip0->length), spd0->id);
#endif

	      esp0 = (esp_header_t *) ((u8 *) ip0 + ip4_header_bytes (ip0));
	      if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_UDP))
		{
		  esp0 =
		    (esp_header_t *) ((u8 *) esp0 + sizeof (udp_header_t));
		}
	      /* FIXME TODO missing check whether there is enough data inside
	       * IP/UDP to contain ESP header & stuff ? */
	      p0 = ipsec_input_protect_policy_match (spd0,
						     clib_net_to_host_u32
						     (ip0->src_address.
						      as_u32),
						     clib_net_to_host_u32
						     (ip0->dst_address.
						      as_u32),
						     clib_net_to_host_u32
						     (esp0->spi));

	      if (PREDICT_TRUE (p0 != NULL))
		{
		  ipsec_matched += 1;

		  pi0 = p0 - im->policies;
		  vlib_increment_combined_counter
		    (&ipsec_spd_policy_counters,
		     thread_index, pi0, 1,
		     clib_net_to_host_u16 (ip0->length));

		  vnet_buffer (b0)->ipsec.sad_index = p0->sa_index;
		  vnet_buffer (b0)->ipsec.flags = 0;
		  next0 = im->esp4_decrypt_next_index;
		  vlib_buffer_advance (b0, ((u8 *) esp0 - (u8 *) ip0));
		  goto trace0;
		}
	      else
		{
		  pi0 = ~0;
		};

	      /* FIXME bypass and discard */
	    trace0:
	      if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE) &&
		  PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
		{
		  ipsec_input_trace_t *tr =
		    vlib_add_trace (vm, node, b0, sizeof (*tr));

		  tr->proto = ip0->protocol;
		  if (p0)
		    tr->sa_id = p0->sa_id;
		  tr->spi = clib_net_to_host_u32 (esp0->spi);
		  tr->seq = clib_net_to_host_u32 (esp0->seq);
		  tr->spd = spd0->id;
		  tr->policy_index = pi0;
		}
	    }
	  else if (ip0->protocol == IP_PROTOCOL_IPSEC_AH)
	    {
	      ah0 = (ah_header_t *) ((u8 *) ip0 + ip4_header_bytes (ip0));
	      p0 = ipsec_input_protect_policy_match (spd0,
						     clib_net_to_host_u32
						     (ip0->src_address.
						      as_u32),
						     clib_net_to_host_u32
						     (ip0->dst_address.
						      as_u32),
						     clib_net_to_host_u32
						     (ah0->spi));

	      if (PREDICT_TRUE (p0 != 0))
		{
		  ipsec_matched += 1;

		  pi0 = p0 - im->policies;
		  vlib_increment_combined_counter
		    (&ipsec_spd_policy_counters,
		     thread_index, pi0, 1,
		     clib_net_to_host_u16 (ip0->length));

		  vnet_buffer (b0)->ipsec.sad_index = p0->sa_index;
		  vnet_buffer (b0)->ipsec.flags = 0;
		  next0 = im->ah4_decrypt_next_index;
		  goto trace1;
		}
	      else
		{
		  pi0 = ~0;
		}
	      /* FIXME bypass and discard */
	    trace1:
	      if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE) &&
		  PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
		{
		  ipsec_input_trace_t *tr =
		    vlib_add_trace (vm, node, b0, sizeof (*tr));

		  tr->proto = ip0->protocol;
		  if (p0)
		    tr->sa_id = p0->sa_id;
		  tr->spi = clib_net_to_host_u32 (ah0->spi);
		  tr->seq = clib_net_to_host_u32 (ah0->seq_no);
		  tr->spd = spd0->id;
		  tr->policy_index = pi0;
		}
	    }
	  else
	    {
	      ipsec_unprocessed += 1;
	    }

	  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);
    }

  vlib_node_increment_counter (vm, ipsec4_input_node.index,
			       IPSEC_INPUT_ERROR_RX_PKTS,
			       from_frame->n_vectors - ipsec_unprocessed);

  vlib_node_increment_counter (vm, ipsec4_input_node.index,
			       IPSEC_INPUT_ERROR_RX_MATCH_PKTS,
			       ipsec_matched);
  return from_frame->n_vectors;
}


/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ipsec4_input_node,static) = {
  .name = "ipsec4-input-feature",
  .vector_size = sizeof (u32),
  .format_trace = format_ipsec_input_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN(ipsec_input_error_strings),
  .error_strings = ipsec_input_error_strings,
  .n_next_nodes = IPSEC_INPUT_N_NEXT,
  .next_nodes = {
#define _(s,n) [IPSEC_INPUT_NEXT_##s] = n,
    foreach_ipsec_input_next
#undef _
  },
};
/* *INDENT-ON* */

static vlib_node_registration_t ipsec6_input_node;


VLIB_NODE_FN (ipsec6_input_node) (vlib_main_t * vm,
				  vlib_node_runtime_t * node,
				  vlib_frame_t * from_frame)
{
  u32 n_left_from, *from, next_index, *to_next, thread_index;
  ipsec_main_t *im = &ipsec_main;
  u32 ipsec_unprocessed = 0;
  u32 ipsec_matched = 0;

  from = vlib_frame_vector_args (from_frame);
  n_left_from = from_frame->n_vectors;
  thread_index = vm->thread_index;

  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, pi0;
	  vlib_buffer_t *b0;
	  ip6_header_t *ip0;
	  esp_header_t *esp0;
	  ip4_ipsec_config_t *c0;
	  ipsec_spd_t *spd0;
	  ipsec_policy_t *p0 = 0;
	  ah_header_t *ah0;
	  u32 header_size = sizeof (ip0[0]);

	  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);
	  b0->flags |= VNET_BUFFER_F_IS_IP6;
	  b0->flags &= ~VNET_BUFFER_F_IS_IP4;
	  c0 = vnet_feature_next_with_data (&next0, b0, sizeof (c0[0]));

	  spd0 = pool_elt_at_index (im->spds, c0->spd_index);

	  ip0 = vlib_buffer_get_current (b0);
	  esp0 = (esp_header_t *) ((u8 *) ip0 + header_size);
	  ah0 = (ah_header_t *) ((u8 *) ip0 + header_size);

	  if (PREDICT_TRUE (ip0->protocol == IP_PROTOCOL_IPSEC_ESP))
	    {
#if 0
	      clib_warning
		("packet received from %U to %U spi %u size %u spd_id %u",
		 format_ip6_address, &ip0->src_address, format_ip6_address,
		 &ip0->dst_address, clib_net_to_host_u32 (esp0->spi),
		 clib_net_to_host_u16 (ip0->payload_length) + header_size,
		 spd0->id);
#endif
	      p0 = ipsec6_input_protect_policy_match (spd0,
						      &ip0->src_address,
						      &ip0->dst_address,
						      clib_net_to_host_u32
						      (esp0->spi));

	      if (PREDICT_TRUE (p0 != 0))
		{
		  ipsec_matched += 1;

		  pi0 = p0 - im->policies;
		  vlib_increment_combined_counter
		    (&ipsec_spd_policy_counters,
		     thread_index, pi0, 1,
		     clib_net_to_host_u16 (ip0->payload_length) +
		     header_size);

		  vnet_buffer (b0)->ipsec.sad_index = p0->sa_index;
		  vnet_buffer (b0)->ipsec.flags = 0;
		  next0 = im->esp6_decrypt_next_index;
		  vlib_buffer_advance (b0, header_size);
		  goto trace0;
		}
	      else
		{
		  pi0 = ~0;
		}
	    }
	  else if (ip0->protocol == IP_PROTOCOL_IPSEC_AH)
	    {
	      p0 = ipsec6_input_protect_policy_match (spd0,
						      &ip0->src_address,
						      &ip0->dst_address,
						      clib_net_to_host_u32
						      (ah0->spi));

	      if (PREDICT_TRUE (p0 != 0))
		{
		  ipsec_matched += 1;
		  pi0 = p0 - im->policies;
		  vlib_increment_combined_counter
		    (&ipsec_spd_policy_counters,
		     thread_index, pi0, 1,
		     clib_net_to_host_u16 (ip0->payload_length) +
		     header_size);

		  vnet_buffer (b0)->ipsec.sad_index = p0->sa_index;
		  vnet_buffer (b0)->ipsec.flags = 0;
		  next0 = im->ah6_decrypt_next_index;
		  goto trace0;
		}
	      else
		{
		  pi0 = ~0;
		}
	    }
	  else
	    {
	      ipsec_unprocessed += 1;
	    }

	trace0:
	  if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE) &&
	      PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
	    {
	      ipsec_input_trace_t *tr =
		vlib_add_trace (vm, node, b0, sizeof (*tr));

	      if (p0)
		tr->sa_id = p0->sa_id;
	      tr->proto = ip0->protocol;
	      tr->spi = clib_net_to_host_u32 (esp0->spi);
	      tr->seq = clib_net_to_host_u32 (esp0->seq);
	      tr->spd = spd0->id;
	    }

	  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);
    }

  vlib_node_increment_counter (vm, ipsec6_input_node.index,
			       IPSEC_INPUT_ERROR_RX_PKTS,
			       from_frame->n_vectors - ipsec_unprocessed);

  vlib_node_increment_counter (vm, ipsec6_input_node.index,
			       IPSEC_INPUT_ERROR_RX_MATCH_PKTS,
			       ipsec_matched);

  return from_frame->n_vectors;
}


/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ipsec6_input_node,static) = {
  .name = "ipsec6-input-feature",
  .vector_size = sizeof (u32),
  .format_trace = format_ipsec_input_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN(ipsec_input_error_strings),
  .error_strings = ipsec_input_error_strings,
  .n_next_nodes = IPSEC_INPUT_N_NEXT,
  .next_nodes = {
#define _(s,n) [IPSEC_INPUT_NEXT_##s] = n,
    foreach_ipsec_input_next
#undef _
  },
};
/* *INDENT-ON* */

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