#
# This file is autogenerated by pip-compile
# To update, run:
#
#    make test-refresh-deps (or update requirements.txt)
#
aenum==2.1.2 ; python_version < "3.6" \
    --hash=sha256:3df9b84cce5dc9ed77c337079f97b66c44c0053eb87d6f4d46b888dc45801e38 \
    --hash=sha256:7a77c205c4bc9d7fe9bd73b3193002d724aebf5909fa0d297534208953891ec8 \
    --hash=sha256:a3208e4b28db3a7b232ff69b934aef2ea1bf27286d9978e1e597d46f490e4687
asn1crypto==0.24.0 \
    --hash=sha256:2f1adbb7546ed199e3c90ef23ec95c5cf3585bac7d11fb7eb562a3fe89c64e87 \
    --hash=sha256:9d5c20441baf0cb60a4ac34cc447c6c189024b6b4c6cd7877034f4965c464e49 \
    # via cryptography
cffi==1.12.3 \
    --hash=sha256:041c81822e9f84b1d9c401182e174996f0bae9991f33725d059b771744290774 \
    --hash=sha256:046ef9a22f5d3eed06334d01b1e836977eeef500d9b78e9ef693f9380ad0b83d \
    --hash=sha256:066bc4c7895c91812eff46f4b1c285220947d4aa46fa0a2651ff85f2afae9c90 \
    --hash=sha256:066c7ff148ae33040c01058662d6752fd73fbc8e64787229ea8498c7d7f4041b \
    --hash=sha256:2444d0c61f03dcd26dbf7600cf64354376ee579acad77aef459e34efcb438c63 \
    --hash=sha256:300832850b8f7967e278870c5d51e3819b9aad8f0a2c8dbe39ab11f119237f45 \
    --hash=sha256:34c77afe85b6b9e967bd8154e3855e847b70ca42043db6ad17f26899a3df1b25 \
    --hash=sha256:46de5fa00f7ac09f020729148ff632819649b3e05a007d286242c4882f7b1dc3 \
    --hash=sha256:4aa8ee7ba27c472d429b980c51e714a24f47ca296d53f4d7868075b175866f4b \
    --hash=sha256:4d0004eb4351e35ed950c14c11e734182591465a33e960a4ab5e8d4f04d72647 \
    --hash=sha256:4e3d3f31a1e202b0f5a35ba3bc4eb41e2fc2b11c1eff38b362de710bcffb5016 \
    --hash=sha256:50bec6d35e6b1aaeb17f7c4e2b9374ebf95a8975d57863546fa83e8d31bdb8c4 \
    --hash=sha256:55cad9a6df1e2a1d62063f79d0881a414a906a6962bc160ac968cc03ed3efcfb \
    --hash=sha256:5662ad4e4e84f1eaa8efce5da695c5d2e229c563f9d5ce5b0113f71321bcf753 \
    --hash=sha256:59b4dc008f98fc6ee2bb4fd7fc786a8d70000d058c2bbe2698275bc53a8d3fa7 \
    --hash=sha256:73e1ffefe05e4ccd7bcea61af76f36077b914f92b76f95ccf00b0c1b9186f3f9 \
    --hash=sha256:a1f0fd46eba2d71ce1589f7e50a9e2ffaeb739fb2c11e8192aa2b45d5f6cc41f \
    --hash=sha256:a2e85dc204556657661051ff4bab75a84e968669765c8a2cd425918699c3d0e8 \
    --hash=sha256:a5457d47dfff24882a21492e5815f891c0ca35fefae8aa742c6c263dac16ef1f \
    --hash=sha256:a8dccd61d52a8dae4a825cdbb7735da530179fea472903eb871a5513b5abbfdc \
    --hash=sha256:ae61af521ed676cf16ae94f30fe202781a38d7178b6b4ab622e4eec8cefaff42 \
    --hash=sha256:b012a5edb48288f77a63dba0840c92d0504aa215612da4541b7b42d849bc83a3 \
    --hash=sha256:d2c5cfa536227f57f97c92ac30c8109688ace8fa4ac086d19d0af47d134e2909 \
    --hash=sha256:d42b5796e20aacc9d15e66befb7a345454eef794fdb0737d1af593447c6c8f45 \
    --hash=sha256:dee54f5d30d775f525894d67b1495625dd9322945e7fee00731952e0368ff42d \
    --hash=sha256:e070535507bd6aa07124258171be2ee8dfc19119c28ca94c9dfb7efd23564512 \
    --hash=sha256:e1ff2748c84d97b065cc95429814cdba39bcbd77c9c85c89344b317dc0d9cbff \
    --hash=sha256:ed851c75d1e0e043cbf5ca9a8e1b13c4c90f3fbd863dacb01c0808e2b5204201
click==7.0 \
    --hash=sha256:2335065e6395b9e67ca716de5f7526736bfa6ceead690adf616d925bdc622b13 \
    --hash=sha256:5b94b49521f6456670fdb30cd82a4eca9412788a93fa6dd6df72c94d5a8ff2d7 \
    # via pip-tools
configparser==3.7.4 \
    --hash=sha256:8be81d89d6e7b4c0d4e44bcc525845f6da25821de80cb5e06e7e0238a2899e32 \
    --hash=sha256:da60d0014fd8c55eb48c1c5354352e363e2d30bbf7057e5e171a468390184c75 \
    # via entrypoints, flake8
cryptography==2.7 \
    --hash=sha256:24b61e5fcb506424d3ec4e18bca995833839bf13c59fc43e530e488f28d46b8c \
    --hash=sha256:25dd1581a183e9e7a806fe0543f485103232f940fcfc301db65e630512cce643 \
    --hash=sha256:3452bba7c21c69f2df772762be0066c7ed5dc65df494a1d53a58b683a83e1216 \
    --hash=sha256:41a0be220dd1ed9e998f5891948306eb8c812b512dc398e5a01846d855050799 \
    --hash=sha256:5751d8a11b956fbfa314f6553d186b94aa70fdb03d8a4d4f1c82dcacf0cbe28a \
    --hash=sha256:5f61c7d749048fa6e3322258b4263463bfccefecb0dd731b6561cb617a1d9bb9 \
    --hash=sha256:72e24c521fa2106f19623a3851e9f89ddfdeb9ac63871c7643790f872a305dfc \
    --hash=sha256:7b97ae6ef5cba2e3bb14256625423413d5ce8d1abb91d4f29b6d1a081da765f8 \
    --hash=sha256:961e886d8a3590fd2c723cf07be14e2a91cf53c25f02435c04d39e90780e3b53 \
    --hash=sha256:96d8473848e984184b6728e2c9d391482008646276c3ff084a1bd89e15ff53a1 \
    --hash=sha256:ae536da50c7ad1e002c3eee101871d93abdc90d9c5f651818450a0d3af718609 \
    --hash=sha256:b0db0cecf396033abb4a93c95d1602f268b3a68bb0a9cc06a7cff587bb9a7292 \
    --hash=sha256:cfee9164954c186b191b91d4193989ca994703b2fff406f71cf454a2d3c7327e \
    --hash=sha256:e6347742ac8f35ded4a46ff835c60e68c22a536a8ae5c4422966d06946b6d4c6 \
    --hash=sha256:f27d93f0139a3c056172ebb5d4f9056e770fdf0206c2f422ff2ebbad142e09ed \
    --hash=sha256:f57b76e46a58b63d1c6375017f4564a28f19a5ca912691fd2e4261b3414b618d
deprecation==2.0.6 \
    --hash=sha256:68071e5ae7cd7e9da6c7dffd750922be4825c7c3a6780d29314076009cc39c35 \
    --hash=sha256:fecd0f05024126466ba7e5309b905f09fce7d25d67e4648f7ec5488f9e764310
entrypoints==0.3 \
    --hash=sha256:589f874b313739ad35be6e0cd7efde2a4e9b6fea91edcc34e58ecbb8dbe56d19 \
    --hash=sha256:c70dd71abe5a8c85e55e12c19bd91ccfeec11a6e99044204511f9ed547d48451 \
    # via flake8
enum34==1.1.6 \
    --hash=sha256:2d81cbbe0e73112bdfe6ef8576f2238f2ba27dd0d55752a776c41d38b7da2850 \
    --hash=sha256:644837f692e5f550741432dd3f223bbb9852018674981b1664e5dc339387588a \
    --hash=sha256:6bd0f6ad48ec2aa117d3d141940d484deccda84d4fcd884f5c3d93c23ecd8c79 \
    --hash=sha256:8ad8c4783bf61ded74527bffb48ed9b54166685e4230386a9ed9b1279e2df5b1 \
    # via cryptography, flake8, syslog-rfc5424-parser
faulthandler==3.1 ; python_version < "3.3" \
    --hash=sha256:83301ffab03c86b291677b64b5cec7026f412cbda5ebd27e4cb3338452c40021 \
    --hash=sha256:b369a43046e7485f36fc63cb
/*
 * node.c: gre packet processing
 *
 * Copyright (c) 2012 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 <vlib/vlib.h>
#include <vnet/pg/pg.h>
#include <vnet/gre/gre.h>
#include <vnet/mpls/mpls.h>
#include <vppinfra/sparse_vec.h>

#define foreach_gre_input_next			\
_(PUNT, "error-punt")                           \
_(DROP, "error-drop")                           \
_(ETHERNET_INPUT, "ethernet-input")             \
_(IP4_INPUT, "ip4-input")                       \
_(IP6_INPUT, "ip6-input")			\
_(MPLS_INPUT, "mpls-input")

typedef enum
{
#define _(s,n) GRE_INPUT_NEXT_##s,
  foreach_gre_input_next
#undef _
    GRE_INPUT_N_NEXT,
} gre_input_next_t;

typedef struct
{
  u32 tunnel_id;
  u32 length;
  ip46_address_t src;
  ip46_address_t dst;
} gre_rx_trace_t;

extern u8 *format_gre_rx_trace (u8 * s, va_list * args);

#ifndef CLIB_MARCH_VARIANT
u8 *
format_gre_rx_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 *);
  gre_rx_trace_t *t = va_arg (*args, gre_rx_trace_t *);

  s = format (s, "GRE: tunnel %d len %d src %U dst %U",
	      t->tunnel_id, clib_net_to_host_u16 (t->length),
	      format_ip46_address, &t->src, IP46_TYPE_ANY,
	      format_ip46_address, &t->dst, IP46_TYPE_ANY);
  return s;
}
#endif /* CLIB_MARCH_VARIANT */

typedef struct
{
  /* Sparse vector mapping gre protocol in network byte order
     to next index. */
  u16 *next_by_protocol;
} gre_input_runtime_t;

always_inline void
gre_trace (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_buffer_t * b,
	   u32 tun_sw_if_index, const ip6_header_t * ip6,
	   const ip4_header_t * ip4, int is_ipv6)
{
  gre_rx_trace_t *tr = vlib_add_trace (vm, node,
				       b, sizeof (*tr));
  tr->tunnel_id = tun_sw_if_index;
  if (is_ipv6)
    {
      tr->length = ip6->payload_length;
      tr->src.ip6.as_u64[0] = ip6->src_address.as_u64[0];
      tr->src.ip6.as_u64[1] = ip6->src_address.as_u64[1];
      tr->dst.ip6.as_u64[0] = ip6->dst_address.as_u64[0];
      tr->dst.ip6.as_u64[1] = ip6->dst_address.as_u64[1];
    }
  else
    {
      tr->length = ip4->length;
      tr->src.as_u64[0] = tr->src.as_u64[1] = 0;
      tr->dst.as_u64[0] = tr->dst.as_u64[1] = 0;
      tr->src.ip4.as_u32 = ip4->src_address.as_u32;
      tr->dst.ip4.as_u32 = ip4->dst_address.as_u32;
    }
}

always_inline void
gre_tunnel_get (const gre_main_t * gm, vlib_node_runtime_t * node,
		vlib_buffer_t * b, u16 * next, const gre_tunnel_key_t * key,
		gre_tunnel_key_t * cached_key, u32 * tun_sw_if_index,
		u32 * cached_tun_sw_if_index, int is_ipv6)
{
  const uword *p;
  p = is_ipv6 ? hash_get_mem (gm->tunnel_by_key6, &key->gtk_v6)
    : hash_get_mem (gm->tunnel_by_key4, &key->gtk_v4);
  if (PREDICT_FALSE (!p))
    {
      *next = GRE_INPUT_NEXT_DROP;
      b->error = node->errors[GRE_ERROR_NO_SUCH_TUNNEL];
      *tun_sw_if_index = ~0;
    }
  else
    {
      const gre_tunnel_t *tun;
      tun = pool_elt_at_index (gm->tunnels, *p);
      *cached_tun_sw_if_index = *tun_sw_if_index = tun->sw_if_index;
      if (is_ipv6)
	cached_key->gtk_v6 = key->gtk_v6;
      else
	cached_key->gtk_v4 = key->gtk_v4;
    }
}

always_inline uword
gre_input (vlib_main_t * vm,
	   vlib_node_runtime_t * node, vlib_frame_t * frame,
	   const int is_ipv6)
{
  gre_main_t *gm = &gre_main;
  u32 *from, n_left_from;
  vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
  u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
  u16 cached_protocol = ~0;
  u32 cached_next_index = SPARSE_VEC_INVALID_INDEX;
  u32 cached_tun_sw_if_index = ~0;
  gre_tunnel_key_t cached_key;

  from = vlib_frame_vector_args (frame);
  n_left_from = frame->n_vectors;
  vlib_get_buffers (vm, from, bufs, n_left_from);

  if (is_ipv6)
    clib_memset (&cached_key.gtk_v6, 0xff, sizeof (cached_key.gtk_v6));
  else
    clib_memset (&cached_key.gtk_v4, 0xff, sizeof (cached_key.gtk_v4));

  while (n_left_from >= 2)
    {
      const ip6_header_t *ip6[2];
      const ip4_header_t *ip4[2];
      const gre_header_t *gre[2];
      u32 nidx[2];
      next_info_t ni[2];
      u8 type[2];
      u16 version[2];
      u32 len[2];
      gre_tunnel_key_t key[2];
      u8 matched[2];
      u32 tun_sw_if_index[2];

      if (PREDICT_TRUE (n_left_from >= 6))
	{
	  vlib_prefetch_buffer_data (b[2], LOAD);
	  vlib_prefetch_buffer_data (b[3], LOAD);
	  vlib_prefetch_buffer_header (b[4], STORE);
	  vlib_prefetch_buffer_header (b[5], STORE);
	}

      if (is_ipv6)
	{
	  /* ip6_local hands us the ip header, not the gre header */
	  ip6[0] = vlib_buffer_get_current (b[0]);
	  ip6[1] = vlib_buffer_get_current (b[1]);
	  gre[0] = (void *) (ip6[0] + 1);
	  gre[1] = (void *) (ip6[1] + 1);
	  vlib_buffer_advance (b[0], sizeof (*ip6[0]) + sizeof (*gre[0]));
	  vlib_buffer_advance (b[1], sizeof (*ip6[0]) + sizeof (*gre[0]));
	}
      else
	{
	  /* ip4_local hands us the ip header, not the gre header */
	  ip4[0] = vlib_buffer_get_current (b[0]);
	  ip4[1] = vlib_buffer_get_current (b[1]);
	  gre[0] = (void *) (ip4[0] + 1);
	  gre[1] = (void *) (ip4[1] + 1);
	  vlib_buffer_advance (b[0], sizeof (*ip4[0]) + sizeof (*gre[0]));
	  vlib_buffer_advance (b[1], sizeof (*ip4[0]) + sizeof (*gre[0]));
	}

      if (PREDICT_TRUE (cached_protocol == gre[0]->protocol))
	{
	  nidx[0] = cached_next_index;
	}
      else
	{
	  cached_next_index = nidx[0] =
	    sparse_vec_index (gm->next_by_protocol, gre[0]->protocol);
	  cached_protocol = gre[0]->protocol;
	}
      if (PREDICT_TRUE (cached_protocol == gre[1]->protocol))
	{
	  nidx[1] = cached_next_index;
	}
      else
	{
	  cached_next_index = nidx[1] =
	    sparse_vec_index (gm->next_by_protocol, gre[1]->protocol);
	  cached_protocol = gre[1]->protocol;
	}

      ni[0] = vec_elt (gm->next_by_protocol, nidx[0]);
      ni[1] = vec_elt (gm->next_by_protocol, nidx[1]);
      next[0] = ni[0].next_index;
      next[1] = ni[1].next_index;
      type[0] = ni[0].tunnel_type;
      type[1] = ni[1].tunnel_type;

      b[0]->error = nidx[0] == SPARSE_VEC_INVALID_INDEX
	? node->errors[GRE_ERROR_UNKNOWN_PROTOCOL]
	: node->errors[GRE_ERROR_NONE];
      b[1]->error = nidx[1] == SPARSE_VEC_INVALID_INDEX
	? node->errors[GRE_ERROR_UNKNOWN_PROTOCOL]
	: node->errors[GRE_ERROR_NONE];

      version[0] = clib_net_to_host_u16 (gre[0]->flags_and_version);
      version[1] = clib_net_to_host_u16 (gre[1]->flags_and_version);
      version[0] &= GRE_VERSION_MASK;
      version[1] &= GRE_VERSION_MASK;

      b[0]->error = version[0]
	? node->errors[GRE_ERROR_UNSUPPORTED_VERSION] : b[0]->error;
      next[0] = version[0] ? GRE_INPUT_NEXT_DROP : next[0];
      b[1]->error = version[1]
	? node->errors[GRE_ERROR_UNSUPPORTED_VERSION] : b[1]->error;
      next[1] = version[1] ? GRE_INPUT_NEXT_DROP : next[1];

      len[0] = vlib_buffer_length_in_chain (vm, b[0]);
      len[1] = vlib_buffer_length_in_chain (vm, b[1]);

      /* always search for P2P types in the DP */
      if (is_ipv6)
	{
	  gre_mk_key6 (&ip6[0]->dst_address,
		       &ip6[0]->src_address,
		       vnet_buffer (b[0])->ip.fib_index,
		       type[0], TUNNEL_MODE_P2P, 0, &key[0].gtk_v6);
	  gre_mk_key6 (&ip6[1]->dst_address,
		       &ip6[1]->src_address,
		       vnet_buffer (b[1])->ip.fib_index,
		       type[1], TUNNEL_MODE_P2P, 0, &key[1].gtk_v6);
	  matched[0] = gre_match_key6 (&cached_key.gtk_v6, &key[0].gtk_v6);
	  matched[1] = gre_match_key6 (&cached_key.gtk_v6, &key[1].gtk_v6);
	}
      else
	{
	  gre_mk_key4 (ip4[0]->dst_address,
		       ip4[0]->src_address,
		       vnet_buffer (b[0])->ip.fib_index,
		       type[0], TUNNEL_MODE_P2P, 0, &key[0].gtk_v4);
	  gre_mk_key4 (ip4[1]->dst_address,
		       ip4[1]->src_address,
		       vnet_buffer (b[1])->ip.fib_index,
		       type[1], TUNNEL_MODE_P2P, 0, &key[1].gtk_v4);
	  matched[0] = gre_match_key4 (&cached_key.gtk_v4, &key[0].gtk_v4);
	  matched[1] = gre_match_key4 (&cached_key.gtk_v4, &key[1].gtk_v4);
	}

      tun_sw_if_index[0] = cached_tun_sw_if_index;
      tun_sw_if_index[1] = cached_tun_sw_if_index;
      if (PREDICT_FALSE (!matched[0]))
	gre_tunnel_get (gm, node, b[0], &next[0], &key[0], &cached_key,
			&tun_sw_if_index[0], &cached_tun_sw_if_index,
			is_ipv6);
      if (PREDICT_FALSE (!matched[1]))
	gre_tunnel_get (gm, node, b[1], &next[1], &key[1], &cached_key,
			&tun_sw_if_index[1], &cached_tun_sw_if_index,
			is_ipv6);

      if (PREDICT_TRUE (next[0] > GRE_INPUT_NEXT_DROP))
	{
	  vlib_increment_combined_counter (&gm->vnet_main->
					   interface_main.combined_sw_if_counters
					   [VNET_INTERFACE_COUNTER_RX],
					   vm->thread_index,
					   tun_sw_if_index[0],
					   1 /* packets */ ,
					   len[0] /* bytes */ );
	  vnet_buffer (b[0])->sw_if_index[VLIB_RX] = tun_sw_if_index[0];
	}
      if (PREDICT_TRUE (next[1] > GRE_INPUT_NEXT_DROP))
	{
	  vlib_increment_combined_counter (&gm->vnet_main->
					   interface_main.combined_sw_if_counters
					   [VNET_INTERFACE_COUNTER_RX],
					   vm->thread_index,
					   tun_sw_if_index[1],
					   1 /* packets */ ,
					   len[1] /* bytes */ );
	  vnet_buffer (b[1])->sw_if_index[VLIB_RX] = tun_sw_if_index[1];
	}

      if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
	gre_trace (vm, node, b[0], tun_sw_if_index[0], ip6[0], ip4[0],
		   is_ipv6);
      if (PREDICT_FALSE (b[1]->flags & VLIB_BUFFER_IS_TRACED))
	gre_trace (vm, node, b[1], tun_sw_if_index[1], ip6[1], ip4[1],
		   is_ipv6);

      b += 2;
      next += 2;
      n_left_from -= 2;
    }

  while (n_left_from >= 1)
    {
      const ip6_header_t *ip6[1];
      const ip4_header_t *ip4[1];
      const gre_header_t *gre[1];
      u32 nidx[1];
      next_info_t ni[1];
      u8 type[1];
      u16 version[1];
      u32 len[1];
      gre_tunnel_key_t key[1];
      u8 matched[1];
      u32 tun_sw_if_index[1];

      if (PREDICT_TRUE (n_left_from >= 3))
	{
	  vlib_prefetch_buffer_data (b[1], LOAD);
	  vlib_prefetch_buffer_header (b[2], STORE);
	}

      if (is_ipv6)
	{
	  /* ip6_local hands us the ip header, not the gre header */
	  ip6[0] = vlib_buffer_get_current (b[0]);
	  gre[0] = (void *) (ip6[0] + 1);
	  vlib_buffer_advance (b[0], sizeof (*ip6[0]) + sizeof (*gre[0]));
	}
      else
	{
	  /* ip4_local hands us the ip header, not the gre header */
	  ip4[0] = vlib_buffer_get_current (b[0]);
	  gre[0] = (void *) (ip4[0] + 1);
	  vlib_buffer_advance (b[0], sizeof (*ip4[0]) + sizeof (*gre[0]));
	}

      if (PREDICT_TRUE (cached_protocol == gre[0]->protocol))
	{
	  nidx[0] = cached_next_index;
	}
      else
	{
	  cached_next_index = nidx[0] =
	    sparse_vec_index (gm->next_by_protocol, gre[0]->protocol);
	  cached_protocol = gre[0]->protocol;
	}

      ni[0] = vec_elt (gm->next_by_protocol, nidx[0]);
      next[0] = ni[0].next_index;
      type[0] = ni[0].tunnel_type;

      b[0]->error = nidx[0] == SPARSE_VEC_INVALID_INDEX
	? node->errors[GRE_ERROR_UNKNOWN_PROTOCOL]
	: node->errors[GRE_ERROR_NONE];

      version[0] = clib_net_to_host_u16 (gre[0]->flags_and_version);
      version[0] &= GRE_VERSION_MASK;

      b[0]->error = version[0]
	? node->errors[GRE_ERROR_UNSUPPORTED_VERSION] : b[0]->error;
      next[0] = version[0] ? GRE_INPUT_NEXT_DROP : next[0];

      len[0] = vlib_buffer_length_in_chain (vm, b[0]);

      if (is_ipv6)
	{
	  gre_mk_key6 (&ip6[0]->dst_address,
		       &ip6[0]->src_address,
		       vnet_buffer (b[0])->ip.fib_index,
		       type[0], TUNNEL_MODE_P2P, 0, &key[0].gtk_v6);
	  matched[0] = gre_match_key6 (&cached_key.gtk_v6, &key[0].gtk_v6);
	}
      else
	{
	  gre_mk_key4 (ip4[0]->dst_address,
		       ip4[0]->src_address,
		       vnet_buffer (b[0])->ip.fib_index,
		       type[0], TUNNEL_MODE_P2P, 0, &key[0].gtk_v4);
	  matched[0] = gre_match_key4 (&cached_key.gtk_v4, &key[0].gtk_v4);
	}

      tun_sw_if_index[0] = cached_tun_sw_if_index;
      if (PREDICT_FALSE (!matched[0]))
	gre_tunnel_get (gm, node, b[0], &next[0], &key[0], &cached_key,
			&tun_sw_if_index[0], &cached_tun_sw_if_index,
			is_ipv6);

      if (PREDICT_TRUE (next[0] > GRE_INPUT_NEXT_DROP))
	{
	  vlib_increment_combined_counter (&gm->vnet_main->
					   interface_main.combined_sw_if_counters
					   [VNET_INTERFACE_COUNTER_RX],
					   vm->thread_index,
					   tun_sw_if_index[0],
					   1 /* packets */ ,
					   len[0] /* bytes */ );
	  vnet_buffer (b[0])->sw_if_index[VLIB_RX] = tun_sw_if_index[0];
	}

      if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
	gre_trace (vm, node, b[0], tun_sw_if_index[0], ip6[0], ip4[0],
		   is_ipv6);

      b += 1;
      next += 1;
      n_left_from -= 1;
    }

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

  vlib_node_increment_counter (vm,
			       is_ipv6 ? gre6_input_node.index :
			       gre4_input_node.index, GRE_ERROR_PKTS_DECAP,
			       n_left_from);

  return frame->n_vectors;
}

VLIB_NODE_FN (gre4_input_node) (vlib_main_t * vm,
				vlib_node_runtime_t * node,
				vlib_frame_t * from_frame)
{
  return gre_input (vm, node, from_frame, /* is_ip6 */ 0);
}

VLIB_NODE_FN (gre6_input_node) (vlib_main_t * vm,
				vlib_node_runtime_t * node,
				vlib_frame_t * from_frame)
{
  return gre_input (vm, node, from_frame, /* is_ip6 */ 1);
}

static char *gre_error_strings[] = {
#define gre_error(n,s) s,
#include "error.def"
#undef gre_error
};

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (gre4_input_node) = {
  .name = "gre4-input",
  /* Takes a vector of packets. */
  .vector_size = sizeof (u32),

  .n_errors = GRE_N_ERROR,
  .error_strings = gre_error_strings,

  .n_next_nodes = GRE_INPUT_N_NEXT,
  .next_nodes = {
#define _(s,n) [GRE_INPUT_NEXT_##s] = n,
    foreach_gre_input_next
#undef _
  },

  .format_buffer = format_gre_header_with_length,
  .format_trace = format_gre_rx_trace,
  .unformat_buffer = unformat_gre_header,
};

VLIB_REGISTER_NODE (gre6_input_node) = {
  .name = "gre6-input",
  /* Takes a vector of packets. */
  .vector_size = sizeof (u32),

  .runtime_data_bytes = sizeof (gre_input_runtime_t),

  .n_errors = GRE_N_ERROR,
  .error_strings = gre_error_strings,

  .n_next_nodes = GRE_INPUT_N_NEXT,
  .next_nodes = {
#define _(s,n) [GRE_INPUT_NEXT_##s] = n,
    foreach_gre_input_next
#undef _
  },

  .format_buffer = format_gre_header_with_length,
  .format_trace = format_gre_rx_trace,
  .unformat_buffer = unformat_gre_header,
};
/* *INDENT-ON* */

#ifndef CLIB_MARCH_VARIANT
void
gre_register_input_protocol (vlib_main_t * vm,
			     gre_protocol_t protocol, u32 node_index,
			     gre_tunnel_type_t tunnel_type)
{
  gre_main_t *em = &gre_main;
  gre_protocol_info_t *pi;
  next_info_t *n;
  u32 i;

  {
    clib_error_t *error = vlib_call_init_function (vm, gre_input_init);
    if (error)
      clib_error_report (error);
  }

  pi = gre_get_protocol_info (em, protocol);
  pi->node_index = node_index;
  pi->tunnel_type = tunnel_type;
  pi->next_index = vlib_node_add_next (vm, gre4_input_node.index, node_index);
  i = vlib_node_add_next (vm, gre6_input_node.index, node_index);
  ASSERT (i == pi->next_index);

  /* Setup gre protocol -> next index sparse vector mapping. */
  n = sparse_vec_validate (em->next_by_protocol,
			   clib_host_to_net_u16 (protocol));
  n->next_index = pi->next_index;
  n->tunnel_type = tunnel_type;
}

static void
gre_setup_node (vlib_main_t * vm, u32 node_index)
{
  vlib_node_t *n = vlib_get_node (vm, node_index);
  pg_node_t *pn = pg_get_node (node_index);

  n->format_buffer = format_gre_header_with_length;
  n->unformat_buffer = unformat_gre_header;
  pn->unformat_edit = unformat_pg_gre_header;
}

static clib_error_t *
gre_input_init (vlib_main_t * vm)
{
  gre_main_t *gm = &gre_main;
  vlib_node_t *ethernet_input, *ip4_input, *ip6_input, *mpls_unicast_input;

  {
    clib_error_t *error;
    error = vlib_call_init_function (vm, gre_init);
    if (error)
      clib_error_report (error);
  }

  gre_setup_node (vm, gre4_input_node.index);
  gre_setup_node (vm, gre6_input_node.index);

  gm->next_by_protocol = sparse_vec_new
    ( /* elt bytes */ sizeof (gm->next_by_protocol[0]),
     /* bits in index */ BITS (((gre_header_t *) 0)->protocol));

  /* These could be moved to the supported protocol input node defn's */
  ethernet_input = vlib_get_node_by_name (vm, (u8 *) "ethernet-input");
  ASSERT (ethernet_input);
  ip4_input = vlib_get_node_by_name (vm, (u8 *) "ip4-input");
  ASSERT (ip4_input);
  ip6_input = vlib_get_node_by_name (vm, (u8 *) "ip6-input");
  ASSERT (ip6_input);
  mpls_unicast_input = vlib_get_node_by_name (vm, (u8 *) "mpls-input");
  ASSERT (mpls_unicast_input);

  gre_register_input_protocol (vm, GRE_PROTOCOL_teb,
			       ethernet_input->index, GRE_TUNNEL_TYPE_TEB);

  gre_register_input_protocol (vm, GRE_PROTOCOL_ip4,
			       ip4_input->index, GRE_TUNNEL_TYPE_L3);

  gre_register_input_protocol (vm, GRE_PROTOCOL_ip6,
			       ip6_input->index, GRE_TUNNEL_TYPE_L3);

  gre_register_input_protocol (vm, GRE_PROTOCOL_mpls_unicast,
			       mpls_unicast_input->index, GRE_TUNNEL_TYPE_L3);

  return 0;
}

VLIB_INIT_FUNCTION (gre_input_init);

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