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authorNeale Ranns <nranns@cisco.com>2019-07-11 03:44:16 -0700
committerNeale Ranns <nranns@cisco.com>2019-07-11 12:08:22 +0000
commit6955ecd5d72c919bddabc272a9fee023557f38d7 (patch)
tree65fa8503dd8973ab6fc24f966e49c973f19cf1b1 /extras
parent85fc13004df7f67012a04e73564ecef1b3641ef3 (diff)
vom: Fix reference to flags in GBP bridge-domain
Type: fix Fixes: 5e82b050 Change-Id: I8f709c5303861ea9984144ce5543c86c934869bb Signed-off-by: Neale Ranns <nranns@cisco.com>
Diffstat (limited to 'extras')
-rw-r--r--extras/vom/vom/gbp_bridge_domain.hpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/extras/vom/vom/gbp_bridge_domain.hpp b/extras/vom/vom/gbp_bridge_domain.hpp
index 264f8b3c031..d397fe5231f 100644
--- a/extras/vom/vom/gbp_bridge_domain.hpp
+++ b/extras/vom/vom/gbp_bridge_domain.hpp
@@ -200,7 +200,7 @@ private:
std::shared_ptr<interface> m_bvi;
std::shared_ptr<interface> m_uu_fwd;
std::shared_ptr<interface> m_bm_flood;
- const flags_t& m_flags;
+ flags_t m_flags;
/**
* A map of all bridge_domains
n165'>165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 
/*
 * ah_encrypt.c : IPSec AH encrypt 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>
#include <vnet/ipsec/esp.h>
#include <vnet/ipsec/ah.h>
#include <vnet/tunnel/tunnel_dp.h>

#define foreach_ah_encrypt_next \
  _ (DROP, "error-drop")                           \
  _ (HANDOFF, "handoff")                           \
  _ (INTERFACE_OUTPUT, "interface-output")


#define _(v, s) AH_ENCRYPT_NEXT_##v,
typedef enum
{
  foreach_ah_encrypt_next
#undef _
    AH_ENCRYPT_N_NEXT,
} ah_encrypt_next_t;

#define foreach_ah_encrypt_error                                \
 _(RX_PKTS, "AH pkts received")                                 \
 _(CRYPTO_ENGINE_ERROR, "crypto engine error (packet dropped)") \
 _(SEQ_CYCLED, "sequence number cycled")


typedef enum
{
#define _(sym,str) AH_ENCRYPT_ERROR_##sym,
  foreach_ah_encrypt_error
#undef _
    AH_ENCRYPT_N_ERROR,
} ah_encrypt_error_t;

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

typedef struct
{
  u32 sa_index;
  u32 spi;
  u32 seq_lo;
  u32 seq_hi;
  ipsec_integ_alg_t integ_alg;
} ah_encrypt_trace_t;

/* packet trace format function */
static u8 *
format_ah_encrypt_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 *);
  ah_encrypt_trace_t *t = va_arg (*args, ah_encrypt_trace_t *);

  s = format (s, "ah: sa-index %d spi %u (0x%08x) seq %u:%u integrity %U",
	      t->sa_index, t->spi, t->spi, t->seq_hi, t->seq_lo,
	      format_ipsec_integ_alg, t->integ_alg);
  return s;
}

static_always_inline void
ah_process_ops (vlib_main_t * vm, vlib_node_runtime_t * node,
		vnet_crypto_op_t * ops, vlib_buffer_t * b[], u16 * nexts)
{
  u32 n_fail, n_ops = vec_len (ops);
  vnet_crypto_op_t *op = ops;

  if (n_ops == 0)
    return;

  n_fail = n_ops - vnet_crypto_process_ops (vm, op, n_ops);

  while (n_fail)
    {
      ASSERT (op - ops < n_ops);

      if (op->status != VNET_CRYPTO_OP_STATUS_COMPLETED)
	{
	  u32 bi = op->user_data;
	  b[bi]->error = node->errors[AH_ENCRYPT_ERROR_CRYPTO_ENGINE_ERROR];
	  nexts[bi] = AH_ENCRYPT_NEXT_DROP;
	  n_fail--;
	}
      op++;
    }
}

typedef struct
{
  union
  {
    /* Variable fields in the IP header not covered by the AH
     * integrity check */
    struct
    {
      u8 hop_limit;
      u32 ip_version_traffic_class_and_flow_label;
    };
    struct
    {
      u8 ttl;
      u8 tos;
    };
  };
  i16 current_data;
  u8 skip;
  u32 sa_index;
} ah_encrypt_packet_data_t;

always_inline uword
ah_encrypt_inline (vlib_main_t * vm,
		   vlib_node_runtime_t * node, vlib_frame_t * frame,
		   int is_ip6)
{
  u32 n_left, *from, thread_index;
  int icv_size = 0;
  from = vlib_frame_vector_args (frame);
  n_left = frame->n_vectors;
  ipsec_main_t *im = &ipsec_main;
  ah_encrypt_packet_data_t pkt_data[VLIB_FRAME_SIZE], *pd = pkt_data;
  thread_index = vm->thread_index;
  vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
  u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
  ipsec_per_thread_data_t *ptd = vec_elt_at_index (im->ptd, thread_index);
  ipsec_sa_t *sa0 = 0;
  ip4_and_ah_header_t *ih0, *oh0 = 0;
  ip6_and_ah_header_t *ih6_0, *oh6_0 = 0;
  u32 current_sa_index = ~0, current_sa_bytes = 0, current_sa_pkts = 0;
  const static ip4_header_t ip4_hdr_template = {
    .ip_version_and_header_length = 0x45,
    .protocol = IP_PROTOCOL_IPSEC_AH,
  };
  const static ip6_header_t ip6_hdr_template = {
    .ip_version_traffic_class_and_flow_label = 0x60,
    .protocol = IP_PROTOCOL_IPSEC_AH,
  };

  clib_memset (pkt_data, 0, VLIB_FRAME_SIZE * sizeof (pkt_data[0]));
  vlib_get_buffers (vm, from, b, n_left);
  vec_reset_length (ptd->crypto_ops);
  vec_reset_length (ptd->integ_ops);

  while (n_left > 0)
    {
      u8 ip_hdr_size;
      u8 next_hdr_type;

      if (vnet_buffer (b[0])->ipsec.sad_index != current_sa_index)
	{
	  if (current_sa_index != ~0)
	    vlib_increment_combined_counter (&ipsec_sa_counters, thread_index,
					     current_sa_index,
					     current_sa_pkts,
					     current_sa_bytes);
	  current_sa_index = vnet_buffer (b[0])->ipsec.sad_index;
	  sa0 = pool_elt_at_index (im->sad, current_sa_index);

	  current_sa_bytes = current_sa_pkts = 0;
	}

      pd->sa_index = current_sa_index;
      next[0] = AH_ENCRYPT_NEXT_DROP;

      if (PREDICT_FALSE (~0 == sa0->encrypt_thread_index))
	{
	  /* this is the first packet to use this SA, claim the SA
	   * for this thread. this could happen simultaneously on
	   * another thread */
	  clib_atomic_cmp_and_swap (&sa0->encrypt_thread_index, ~0,
				    ipsec_sa_assign_thread (thread_index));
	}

      if (PREDICT_TRUE (thread_index != sa0->encrypt_thread_index))
	{
	  next[0] = AH_ENCRYPT_NEXT_HANDOFF;
	  goto next;
	}

      if (PREDICT_FALSE (esp_seq_advance (sa0)))
	{
	  b[0]->error = node->errors[AH_ENCRYPT_ERROR_SEQ_CYCLED];
	  pd->skip = 1;
	  goto next;
	}

      current_sa_pkts += 1;
      current_sa_bytes += b[0]->current_length;

      ssize_t adv;
      ih0 = vlib_buffer_get_current (b[0]);

      if (PREDICT_TRUE (ipsec_sa_is_set_IS_TUNNEL (sa0)))
	{
	  if (is_ip6)
	    adv = -sizeof (ip6_and_ah_header_t);
	  else
	    adv = -sizeof (ip4_and_ah_header_t);
	}
      else
	{
	  adv = -sizeof (ah_header_t);
	}

      icv_size = sa0->integ_icv_size;
      const u8 padding_len = ah_calc_icv_padding_len (icv_size, is_ip6);
      adv -= padding_len;
      /* transport mode save the eth header before it is overwritten */
      if (PREDICT_FALSE (!ipsec_sa_is_set_IS_TUNNEL (sa0)))
	{
	  const u32 l2_len = vnet_buffer (b[0])->ip.save_rewrite_length;
	  u8 *l2_hdr_in = (u8 *) vlib_buffer_get_current (b[0]) - l2_len;

	  u8 *l2_hdr_out = l2_hdr_in + adv - icv_size;

	  clib_memcpy_le32 (l2_hdr_out, l2_hdr_in, l2_len);
	}

      vlib_buffer_advance (b[0], adv - icv_size);

      if (is_ip6)
	{
	  ih6_0 = (ip6_and_ah_header_t *) ih0;
	  ip_hdr_size = sizeof (ip6_header_t);
	  oh6_0 = vlib_buffer_get_current (b[0]);
	  pd->current_data = b[0]->current_data;
	  pd->hop_limit = ih6_0->ip6.hop_limit;

	  oh6_0->ip6.ip_version_traffic_class_and_flow_label =
	    ih6_0->ip6.ip_version_traffic_class_and_flow_label;

	  ip6_set_dscp_network_order (&oh6_0->ip6, sa0->dscp);

	  tunnel_encap_fixup_6o6 (sa0->tunnel_flags,
				  &ih6_0->ip6, &oh6_0->ip6);

	  pd->ip_version_traffic_class_and_flow_label =
	    oh6_0->ip6.ip_version_traffic_class_and_flow_label;
	  oh6_0->ip6.ip_version_traffic_class_and_flow_label = 0;

	  if (PREDICT_TRUE (ipsec_sa_is_set_IS_TUNNEL (sa0)))
	    {
	      next_hdr_type = IP_PROTOCOL_IPV6;
	    }
	  else
	    {
	      next_hdr_type = ih6_0->ip6.protocol;
	      memmove (oh6_0, ih6_0, sizeof (ip6_header_t));
	    }

	  clib_memcpy_fast (&oh6_0->ip6, &ip6_hdr_template, 8);
	  oh6_0->ah.reserved = 0;
	  oh6_0->ah.nexthdr = next_hdr_type;
	  oh6_0->ah.spi = clib_net_to_host_u32 (sa0->spi);
	  oh6_0->ah.seq_no = clib_net_to_host_u32 (sa0->seq);
	  oh6_0->ip6.payload_length =
	    clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b[0]) -
				  sizeof (ip6_header_t));
	  oh6_0->ah.hdrlen =
	    (sizeof (ah_header_t) + icv_size + padding_len) / 4 - 2;
	}
      else
	{
	  ip_hdr_size = sizeof (ip4_header_t);
	  oh0 = vlib_buffer_get_current (b[0]);
	  pd->ttl = ih0->ip4.ttl;

	  if (sa0->dscp)
	    pd->tos = sa0->dscp << 2;
	  else
	    {
	      pd->tos = ih0->ip4.tos;
	      if (!
		  (sa0->tunnel_flags &
		   TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP))
		pd->tos &= 0x3;
	      if (!
		  (sa0->tunnel_flags &
		   TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_ECN))
		pd->tos &= 0xfc;
	    }
	  pd->current_data = b[0]->current_data;
	  clib_memset (oh0, 0, sizeof (ip4_and_ah_header_t));

	  if (PREDICT_TRUE (ipsec_sa_is_set_IS_TUNNEL (sa0)))
	    {
	      next_hdr_type = IP_PROTOCOL_IP_IN_IP;
	    }
	  else
	    {
	      next_hdr_type = ih0->ip4.protocol;
	      memmove (oh0, ih0, sizeof (ip4_header_t));
	    }

	  clib_memcpy_fast (&oh0->ip4, &ip4_hdr_template,
			    sizeof (ip4_header_t) -
			    sizeof (ip4_address_pair_t));

	  oh0->ip4.length =
	    clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b[0]));
	  oh0->ah.spi = clib_net_to_host_u32 (sa0->spi);
	  oh0->ah.seq_no = clib_net_to_host_u32 (sa0->seq);
	  oh0->ah.nexthdr = next_hdr_type;
	  oh0->ah.hdrlen =
	    (sizeof (ah_header_t) + icv_size + padding_len) / 4 - 2;
	}

      if (PREDICT_TRUE (!is_ip6 && ipsec_sa_is_set_IS_TUNNEL (sa0) &&
			!ipsec_sa_is_set_IS_TUNNEL_V6 (sa0)))
	{
	  clib_memcpy_fast (&oh0->ip4.address_pair,
			    &sa0->ip4_hdr.address_pair,
			    sizeof (ip4_address_pair_t));

	  next[0] = sa0->dpo.dpoi_next_node;
	  vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = sa0->dpo.dpoi_index;
	}
      else if (is_ip6 && ipsec_sa_is_set_IS_TUNNEL (sa0) &&
	       ipsec_sa_is_set_IS_TUNNEL_V6 (sa0))
	{
	  clib_memcpy_fast (&oh6_0->ip6.src_address,
			    &sa0->ip6_hdr.src_address,
			    sizeof (ip6_address_t) * 2);
	  next[0] = sa0->dpo.dpoi_next_node;
	  vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = sa0->dpo.dpoi_index;
	}

      if (PREDICT_TRUE (sa0->integ_op_id))
	{
	  vnet_crypto_op_t *op;
	  vec_add2_aligned (ptd->integ_ops, op, 1, CLIB_CACHE_LINE_BYTES);
	  vnet_crypto_op_init (op, sa0->integ_op_id);
	  op->src = vlib_buffer_get_current (b[0]);
	  op->len = b[0]->current_length;
	  op->digest = vlib_buffer_get_current (b[0]) + ip_hdr_size +
	    sizeof (ah_header_t);
	  clib_memset (op->digest, 0, icv_size);
	  op->digest_len = icv_size;
	  op->key_index = sa0->integ_key_index;
	  op->user_data = b - bufs;
	  if (ipsec_sa_is_set_USE_ESN (sa0))
	    {
	      u32 seq_hi = clib_host_to_net_u32 (sa0->seq_hi);

	      op->len += sizeof (seq_hi);
	      clib_memcpy (op->src + b[0]->current_length, &seq_hi,
			   sizeof (seq_hi));
	    }
	}

      if (!ipsec_sa_is_set_IS_TUNNEL (sa0))
	{
	  next[0] = AH_ENCRYPT_NEXT_INTERFACE_OUTPUT;
	  vlib_buffer_advance (b[0], -sizeof (ethernet_header_t));
	}

    next:
      n_left -= 1;
      next += 1;
      pd += 1;
      b += 1;
    }

  n_left = frame->n_vectors;
  next = nexts;
  pd = pkt_data;
  b = bufs;

  vlib_node_increment_counter (vm, node->node_index,
			       AH_ENCRYPT_ERROR_RX_PKTS, n_left);
  vlib_increment_combined_counter (&ipsec_sa_counters, thread_index,
				   current_sa_index, current_sa_pkts,
				   current_sa_bytes);

  ah_process_ops (vm, node, ptd->integ_ops, bufs, nexts);

  while (n_left)
    {
      if (pd->skip)
	goto trace;

      if (is_ip6)
	{
	  oh6_0 = (ip6_and_ah_header_t *) (b[0]->data + pd->current_data);
	  oh6_0->ip6.hop_limit = pd->hop_limit;
	  oh6_0->ip6.ip_version_traffic_class_and_flow_label =
	    pd->ip_version_traffic_class_and_flow_label;
	}
      else
	{
	  oh0 = (ip4_and_ah_header_t *) (b[0]->data + pd->current_data);
	  oh0->ip4.ttl = pd->ttl;
	  oh0->ip4.tos = pd->tos;
	  oh0->ip4.checksum = ip4_header_checksum (&oh0->ip4);
	}

    trace:
      if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
	{
	  sa0 = vec_elt_at_index (im->sad, pd->sa_index);
	  ah_encrypt_trace_t *tr =
	    vlib_add_trace (vm, node, b[0], sizeof (*tr));
	  tr->spi = sa0->spi;
	  tr->seq_lo = sa0->seq;
	  tr->seq_hi = sa0->seq_hi;
	  tr->integ_alg = sa0->integ_alg;
	  tr->sa_index = pd->sa_index;
	}

      n_left -= 1;
      next += 1;
      pd += 1;
      b += 1;
    }

  n_left = frame->n_vectors;
  vlib_buffer_enqueue_to_next (vm, node, from, nexts, n_left);

  return n_left;
}

VLIB_NODE_FN (ah4_encrypt_node) (vlib_main_t * vm,
				 vlib_node_runtime_t * node,
				 vlib_frame_t * from_frame)
{
  return ah_encrypt_inline (vm, node, from_frame, 0 /* is_ip6 */ );
}

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ah4_encrypt_node) = {
  .name = "ah4-encrypt",
  .vector_size = sizeof (u32),
  .format_trace = format_ah_encrypt_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,

  .n_errors = ARRAY_LEN(ah_encrypt_error_strings),
  .error_strings = ah_encrypt_error_strings,

  .n_next_nodes = AH_ENCRYPT_N_NEXT,
  .next_nodes = {
    [AH_ENCRYPT_NEXT_DROP] = "ip4-drop",
    [AH_ENCRYPT_NEXT_HANDOFF] = "ah4-encrypt-handoff",
    [AH_ENCRYPT_NEXT_INTERFACE_OUTPUT] = "interface-output",
  },
};
/* *INDENT-ON* */

VLIB_NODE_FN (ah6_encrypt_node) (vlib_main_t * vm,
				 vlib_node_runtime_t * node,
				 vlib_frame_t * from_frame)
{
  return ah_encrypt_inline (vm, node, from_frame, 1 /* is_ip6 */ );
}

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ah6_encrypt_node) = {
  .name = "ah6-encrypt",
  .vector_size = sizeof (u32),
  .format_trace = format_ah_encrypt_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,

  .n_errors = ARRAY_LEN(ah_encrypt_error_strings),
  .error_strings = ah_encrypt_error_strings,

  .n_next_nodes = AH_ENCRYPT_N_NEXT,
  .next_nodes = {
    [AH_ENCRYPT_NEXT_DROP] = "ip6-drop",
    [AH_ENCRYPT_NEXT_HANDOFF] = "ah6-encrypt-handoff",
    [AH_ENCRYPT_NEXT_INTERFACE_OUTPUT] = "interface-output",
  },
};
/* *INDENT-ON* */

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