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path: root/test/requirements-3.txt
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#
# This file is autogenerated by pip-compile
# To update, run:
#
#    make test-refresh-deps (or update requirements.txt)
#
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
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
flake8==3.7.7 \
    --hash=sha256:859996073f341f2670741b51ec1e67a01da142831aa1fdc6242dbf88dffbe661 \
    --hash=sha256:a796a115208f5c03b18f332f7c11729812c8c3ded6c46319c59b53efd3819da8
graphviz==0.11 \
    --hash=sha256:6f261efbe92b938808ebb64048253b99f379f6300c6c776d440984e71678f642 \
    --hash=sha256:fc6f825a2a1be9841c1c7493777c0c742514c7daf979691f0e143d7dc0cc1fa9 \
    # via objgraph
lark-parser==0.6.7 \
    --hash=sha256:062800f3823a6c733ec1d181a2089a22d1f62dbe65f90a3f6b1e6de1934b05ef \
    # via syslog-rfc5424-parser
mccabe==0.6.1 \
    --hash=sha256:ab8a6258860da4b6677da4bd2fe5dc2c659cff31b3ee4f7f5d64e79735b80d42 \
    --hash=sha256:dd8d182285a0fe56bace7f45b5e7d1a6ebcbf524e8f3bd87eb0f125271b8831f \
    # via flake8
objgraph==3.4.1 \
    --hash=sha256:10d50116d1a66934d143a07308a5b3b3edcc021e1457f66ff792584166cae7cd \
    --hash=sha256:bf29512d7f8b457b53fa0722ea59f516abb8abc59b78f97f0ef81394a0c615a7
packaging==19.0 \
    --hash=sha256:0c98a5d0be38ed775798ece1b9727178c4469d9c3b4ada66e8e6b7849f8732af \
    --hash=sha256:9e1cbf8c12b1f1ce0bb5344b8d7ecf66a6f8a6e91bcb0c84593ed6d3ab5c4ab3 \
    # via deprecation
parameterized==0.7.0 \
    --hash=sha256:020343a281efcfe9b71b9028a91817f981202c14d72104b5a2fbe401dee25a18 \
    --hash=sha256:d8c8837fb677ed2d5a93b9e2308ce0da3aeb58cf513120d501e0b7af14da78d5
pexpect==4.7.0 \
    --hash=sha256:2094eefdfcf37a1fdbfb9aa090862c1a4878e5c7e0e7e7088bdb511c558e5cd1 \
    --hash=sha256:9e2c1fd0e6ee3a49b28f95d4b33bc389c89b20af6a1255906e90ff1262ce62eb
pip-tools==3.8.0 \
    --hash=sha256:1240b075af2aaf8231898a6cb0220a103a06182a239ebf4537920e5d02ad89c3 \
    --hash=sha256:e4f33c3c77954182ec6998d661b0c2749428d3b461c0247d28ee67493a1c90ef
psutil==5.6.3 \
    --hash=sha256:028a1ec3c6197eadd11e7b46e8cc2f0720dc18ac6d7aabdb8e8c0d6c9704f000 \
    --hash=sha256:503e4b20fa9d3342bcf58191bbc20a4a5ef79ca7df8972e6197cc14c5513e73d \
    --hash=sha256:863a85c1c0a5103a12c05a35e59d336e1d665747e531256e061213e2e90f63f3 \
    --hash=sha256:954f782608bfef9ae9f78e660e065bd8ffcfaea780f9f2c8a133bb7cb9e826d7 \
    --hash=sha256:b6e08f965a305cd84c2d07409bc16fbef4417d67b70c53b299116c5b895e3f45 \
    --hash=sha256:bc96d437dfbb8865fc8828cf363450001cb04056bbdcdd6fc152c436c8a74c61 \
    --hash=sha256:cf49178021075d47c61c03c0229ac0c60d5e2830f8cab19e2d88e579b18cdb76 \
    --hash=sha256:d5350cb66690915d60f8b233180f1e49938756fb2d501c93c44f8fb5b970cc63 \
    --hash=sha256:eba238cf1989dfff7d483c029acb0ac4fcbfc15de295d682901f0e2497e6781a
ptyprocess==0.6.0 \
    --hash=sha256:923f299cc5ad920c68f2bc0bc98b75b9f838b93b599941a6b63ddbc2476394c0 \
    --hash=sha256:d7cc528d76e76342423ca640335bd3633420dc1366f258cb31d05e865ef5ca1f \
    # via pexpect
pycodestyle==2.5.0 \
    --hash=sha256:95a2219d12372f05704562a14ec30bc76b05a5b297b21a5dfe3f6fac3491ae56 \
    --hash=sha256:e40a936c9a450ad81df37f549d676d127b1b66000a6c500caa2b085bc0ca976c
pycparser==2.19 \
    --hash=sha256:a988718abfad80b6b157acce7bf130a30876d27603738ac39f140993246b25b3 \
    # via cffi
pyflakes==2.1.1 \
    --hash=sha256:17dbeb2e3f4d772725c777fabc446d5634d1038f234e77343108ce445ea69ce0 \
    --hash=sha256:d976835886f8c5b31d47970ed689944a0262b5f3afa00a5a7b4dc81e5449f8a2 \
    # via flake8
pympler==0.7 \
    --hash=sha256:7a11e739125a9ce8bf868ded67238a40e8a7bf979bc03005eb8126182e5e274e
pyparsing==2.4.0 \
    --hash=sha256:1873c03321fc118f4e9746baf201ff990ceb915f433f23b395f5580d1840cb2a \
    --hash=sha256:9b6323ef4ab914af344ba97510e966d64ba91055d6b9afa6b30799340e89cc03 \
    # via packaging
scapy==2.4.0 ; python_version >= "2.7" or python_version >= "3.4" \
    --hash=sha256:452f714f5c2eac6fd0a6146b1dbddfc24dd5f4103f3ed76227995a488cfb2b73
six==1.12.0 \
    --hash=sha256:3350809f0555b11f552448330d0b52d5f24c91a322ea4a15ef22629740f3761c \
    --hash=sha256:d16a0141ec1a18405cd4ce8b4613101da75da0e9a7aec5bdd4fa804d0e0eba73
subprocess32==3.5.4 \
    --hash=sha256:88e37c1aac5388df41cc8a8456bb49ebffd321a3ad4d70358e3518176de3a56b \
    --hash=sha256:eb2937c80497978d181efa1b839ec2d9622cf9600a039a79d0e108d1f9aec79d
syslog-rfc5424-parser==0.3.1 \
    --hash=sha256:994dbb7b138ff175dd2e2a09ae487af4875cd608de9dcec25622c9b96fc0aa78 \
    --hash=sha256:ff11d711d88d98538e1a0f1bd1a89449d3e88bc5abed66e3924b1a500869cb53
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/*
 * Copyright (c) 2018 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.
 */
/**
 * @file
 * @brief NAT44 endpoint-dependent inside to outside network translation
 */

#include <vlib/vlib.h>
#include <vnet/vnet.h>
#include <vnet/pg/pg.h>
#include <vnet/ip/ip.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/fib/ip4_fib.h>
#include <vnet/udp/udp.h>
#include <vppinfra/error.h>
#include <nat/nat.h>
#include <nat/nat_ipfix_logging.h>
#include <nat/nat_inlines.h>
#include <nat/nat44/inlines.h>
#include <nat/nat_syslog.h>
#include <nat/nat_ha.h>

static char *nat_in2out_ed_error_strings[] = {
#define _(sym,string) string,
  foreach_nat_in2out_ed_error
#undef _
};

typedef struct
{
  u32 sw_if_index;
  u32 next_index;
  u32 session_index;
  u32 is_slow_path;
} nat_in2out_ed_trace_t;

static u8 *
format_nat_in2out_ed_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 *);
  nat_in2out_ed_trace_t *t = va_arg (*args, nat_in2out_ed_trace_t *);
  char *tag;

  tag =
    t->is_slow_path ? "NAT44_IN2OUT_ED_SLOW_PATH" :
    "NAT44_IN2OUT_ED_FAST_PATH";

  s = format (s, "%s: sw_if_index %d, next index %d, session %d", tag,
	      t->sw_if_index, t->next_index, t->session_index);

  return s;
}

#ifndef CLIB_MARCH_VARIANT
int
nat44_i2o_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void *arg)
{
  snat_main_t *sm = &snat_main;
  nat44_is_idle_session_ctx_t *ctx = arg;
  snat_session_t *s;
  u64 sess_timeout_time;
  u8 proto;
  u16 r_port, l_port;
  ip4_address_t *l_addr, *r_addr;
  u32 fib_index;
  clib_bihash_kv_16_8_t ed_kv;
  int i;
  snat_address_t *a;
  snat_session_key_t key;
  snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data,
						       ctx->thread_index);

  s = pool_elt_at_index (tsm->sessions, kv->value);
  sess_timeout_time = s->last_heard + (f64) nat44_session_get_timeout (sm, s);
  if (ctx->now >= sess_timeout_time)
    {
      if (is_fwd_bypass_session (s))
	goto delete;

      l_addr = &s->out2in.addr;
      r_addr = &s->ext_host_addr;
      fib_index = s->out2in.fib_index;
      if (snat_is_unk_proto_session (s))
	{
	  proto = s->in2out.port;
	  r_port = 0;
	  l_port = 0;
	}
      else
	{
	  proto = snat_proto_to_ip_proto (s->in2out.protocol);
	  l_port = s->out2in.port;
	  r_port = s->ext_host_port;
	}
      make_ed_kv (l_addr, r_addr, proto, fib_index, l_port, r_port, ~0ULL,
		  &ed_kv);
      if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &ed_kv, 0))
	nat_elog_warn ("out2in_ed key del failed");

      if (snat_is_unk_proto_session (s))
	goto delete;

      snat_ipfix_logging_nat44_ses_delete (ctx->thread_index,
					   s->in2out.addr.as_u32,
					   s->out2in.addr.as_u32,
					   s->in2out.protocol,
					   s->in2out.port,
					   s->out2in.port,
					   s->in2out.fib_index);

      nat_syslog_nat44_sdel (s->user_index, s->in2out.fib_index,
			     &s->in2out.addr, s->in2out.port,
			     &s->ext_host_nat_addr, s->ext_host_nat_port,
			     &s->out2in.addr, s->out2in.port,
			     &s->ext_host_addr, s->ext_host_port,
			     s->in2out.protocol, is_twice_nat_session (s));

      nat_ha_sdel (&s->out2in.addr, s->out2in.port, &s->ext_host_addr,
		   s->ext_host_port, s->out2in.protocol, s->out2in.fib_index,
		   ctx->thread_index);

      if (is_twice_nat_session (s))
	{
	  for (i = 0; i < vec_len (sm->twice_nat_addresses); i++)
	    {
	      key.protocol = s->in2out.protocol;
	      key.port = s->ext_host_nat_port;
	      a = sm->twice_nat_addresses + i;
	      if (a->addr.as_u32 == s->ext_host_nat_addr.as_u32)
		{
		  snat_free_outside_address_and_port (sm->twice_nat_addresses,
						      ctx->thread_index,
						      &key);
		  break;
		}
	    }
	}

      if (snat_is_session_static (s))
	goto delete;

      snat_free_outside_address_and_port (sm->addresses, ctx->thread_index,
					  &s->out2in);
    delete:
      nat44_ed_delete_session (sm, s, ctx->thread_index, 1);
      return 1;
    }

  return 0;
}
#endif

static inline u32
icmp_in2out_ed_slow_path (snat_main_t * sm, vlib_buffer_t * b0,
			  ip4_header_t * ip0, icmp46_header_t * icmp0,
			  u32 sw_if_index0, u32 rx_fib_index0,
			  vlib_node_runtime_t * node, u32 next0, f64 now,
			  u32 thread_index, snat_session_t ** p_s0)
{
  vlib_main_t *vm = vlib_get_main ();

  next0 = icmp_in2out (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
		       next0, thread_index, p_s0, 0);
  snat_session_t *s0 = *p_s0;
  if (PREDICT_TRUE (next0 != NAT_NEXT_DROP && s0))
    {
      /* Accounting */
      nat44_session_update_counters (s0, now,
				     vlib_buffer_length_in_chain
				     (vm, b0), thread_index);
      /* Per-user LRU list maintenance */
      nat44_session_update_lru (sm, s0, thread_index);
    }
  return next0;
}

static_always_inline u16
snat_random_port (u16 min, u16 max)
{
  snat_main_t *sm = &snat_main;
  return min + random_u32 (&sm->random_seed) /
    (random_u32_max () / (max - min + 1) + 1);
}

static int
nat_ed_alloc_addr_and_port (snat_main_t * sm, u32 rx_fib_index,
			    u32 snat_proto, u32 thread_index,
			    ip4_address_t r_addr, u16 r_port, u8 proto,
			    u16 port_per_thread, u32 snat_thread_index,
			    snat_session_t * s,
			    ip4_address_t * allocated_addr,
			    u16 * allocated_port,
			    clib_bihash_kv_16_8_t * out2in_ed_kv)
{
  int i;
  snat_address_t *a, *ga = 0;
  u32 portnum;
  snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];

  const u16 port_thread_offset = (port_per_thread * snat_thread_index) + 1024;

  for (i = 0; i < vec_len (sm->addresses); i++)
    {
      a = sm->addresses + i;
      switch (snat_proto)
	{
#define _(N, j, n, unused)                                                    \
  case SNAT_PROTOCOL_##N:                                                     \
    if (a->fib_index == rx_fib_index)                                         \
      {                                                                       \
        u16 port = snat_random_port (1, port_per_thread);                     \
        u16 attempts = port_per_thread;                                       \
        while (attempts > 0)                                                  \
          {                                                                   \
            --attempts;                                                       \
            portnum = port_thread_offset + port;                              \
            make_ed_kv (&a->addr, &r_addr, proto, s->out2in.fib_index,        \
                        clib_host_to_net_u16 (portnum), r_port,               \
                        s - tsm->sessions, out2in_ed_kv);                     \
            int rv = clib_bihash_add_del_16_8 (&tsm->out2in_ed, out2in_ed_kv, \
                                               2 /* is_add */);               \
            if (0 == rv)                                                      \
              {                                                               \
                ++a->busy_##n##_port_refcounts[portnum];                      \
                a->busy_##n##_ports_per_thread[thread_index]++;               \
                a->busy_##n##_ports++;                                        \
                *allocated_addr = a->addr;                                    \
                *allocated_port = clib_host_to_net_u16 (portnum);             \
                return 0;                                                     \
              }                                                               \
            port = (port + 1) % port_per_thread;                              \
          }                                                                   \
      }                                                                       \
    else if (a->fib_index == ~0)                                              \
      {                                                                       \
        ga = a;                                                               \
      }                                                                       \
    break;

	  foreach_snat_protocol;
	default:
	  nat_elog_info ("unknown protocol");
	  return 1;
	}
    }

  if (ga)
    {
      /* fake fib_index to reuse macro */
      rx_fib_index = ~0;
      a = ga;
      switch (snat_proto)
	{
	  foreach_snat_protocol;
	default:
	  nat_elog_info ("unknown protocol");
	  return 1;
	}
    }

#undef _

  /* Totally out of translations to use... */
  snat_ipfix_logging_addresses_exhausted (thread_index, 0);
  return 1;
}

static u32
slow_path_ed (snat_main_t * sm,
	      vlib_buffer_t * b,
	      ip4_address_t l_addr,
	      ip4_address_t r_addr,
	      u16 l_port,
	      u16 r_port,
	      u8 proto,
	      u32 rx_fib_index,
	      snat_session_t ** sessionp,
	      vlib_node_runtime_t * node, u32 next, u32 thread_index, f64 now)
{
  snat_session_t *s = NULL;
  snat_session_key_t key0, key1;
  lb_nat_type_t lb = 0;
  snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
  u32 snat_proto = ip_proto_to_snat_proto (proto);
  nat_outside_fib_t *outside_fib;
  fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
  clib_bihash_kv_16_8_t out2in_ed_kv;
  ip4_address_t allocated_addr;
  u16 allocated_port;
  u8 identity_nat;
  fib_prefix_t pfx = {
    .fp_proto = FIB_PROTOCOL_IP4,
    .fp_len = 32,
    .fp_addr = {.ip4.as_u32 = r_addr.as_u32,},
  };
  nat44_is_idle_session_ctx_t ctx;

  if (PREDICT_TRUE (snat_proto == SNAT_PROTOCOL_TCP))
    {
      if (PREDICT_FALSE
	  (!tcp_flags_is_init
	   (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags)))
	{
	  b->error = node->errors[NAT_IN2OUT_ED_ERROR_NON_SYN];
	  return NAT_NEXT_DROP;
	}
    }

  // TODO: based on fib index do a lookup
  if (PREDICT_FALSE
      (nat44_ed_maximum_sessions_exceeded (sm, rx_fib_index, thread_index)))
    {
      if (!nat_global_lru_free_one (sm, thread_index, now))
	{
	  b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED];
	  nat_ipfix_logging_max_sessions (thread_index, sm->max_translations);
	  nat_elog_notice ("maximum sessions exceeded");
	  return NAT_NEXT_DROP;
	}
    }

  key0.addr = l_addr;
  key0.port = l_port;
  key1.protocol = key0.protocol = snat_proto;
  key0.fib_index = rx_fib_index;
  key1.fib_index = sm->outside_fib_index;

  /* First try to match static mapping by local address and port */
  if (snat_static_mapping_match
      (sm, key0, &key1, 0, 0, 0, &lb, 0, &identity_nat))
    {
      s = nat_ed_session_alloc (sm, thread_index, now);
      if (!s)
	{
	  nat_elog_warn ("create NAT session failed");
	  b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_USER_SESS_EXCEEDED];
	  return NAT_NEXT_DROP;
	}
      switch (vec_len (sm->outside_fibs))
	{
	case 0:
	  s->out2in.fib_index = sm->outside_fib_index;
	  break;
	case 1:
	  s->out2in.fib_index = sm->outside_fibs[0].fib_index;
	  break;
	default:
          /* *INDENT-OFF* */
          vec_foreach (outside_fib, sm->outside_fibs)
          {
            fei = fib_table_lookup (outside_fib->fib_index, &pfx);
            if (FIB_NODE_INDEX_INVALID != fei)
              {
                if (fib_entry_get_resolving_interface (fei) != ~0)
                  {
                    s->out2in.fib_index = outside_fib->fib_index;
                    break;
                  }
              }
          }
          /* *INDENT-ON* */
	  break;
	}

      /* Try to create dynamic translation */
      if (nat_ed_alloc_addr_and_port (sm, rx_fib_index, snat_proto,
				      thread_index, r_addr, r_port, proto,
				      sm->port_per_thread,
				      tsm->snat_thread_index, s,
				      &allocated_addr,
				      &allocated_port, &out2in_ed_kv))
	{
	  nat_elog_notice ("addresses exhausted");
	  b->error = node->errors[NAT_IN2OUT_ED_ERROR_OUT_OF_PORTS];
	  nat_free_session_data (sm, s, thread_index, 0);
	  nat44_ed_delete_session (sm, s, thread_index, 1);
	  return NAT_NEXT_DROP;
	}
      key1.addr = allocated_addr;
      key1.port = allocated_port;
    }
  else
    {
      if (PREDICT_FALSE (identity_nat))
	{
	  *sessionp = s;
	  return next;
	}
      s = nat_ed_session_alloc (sm, thread_index, now);
      if (!s)
	{
	  nat_elog_warn ("create NAT session failed");
	  b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_USER_SESS_EXCEEDED];
	  return NAT_NEXT_DROP;
	}
      switch (vec_len (sm->outside_fibs))
	{
	case 0:
	  s->out2in.fib_index = sm->outside_fib_index;
	  break;
	case 1:
	  s->out2in.fib_index = sm->outside_fibs[0].fib_index;
	  break;
	default:
          /* *INDENT-OFF* */
          vec_foreach (outside_fib, sm->outside_fibs)
          {
            fei = fib_table_lookup (outside_fib->fib_index, &pfx);
            if (FIB_NODE_INDEX_INVALID != fei)
              {
                if (fib_entry_get_resolving_interface (fei) != ~0)
                  {
                    s->out2in.fib_index = outside_fib->fib_index;
                    break;
                  }
              }
          }
          /* *INDENT-ON* */
	  break;
	}

      s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;


      make_ed_kv (&key1.addr, &r_addr, proto,
		  s->out2in.fib_index, key1.port, r_port, s - tsm->sessions,
		  &out2in_ed_kv);
      if (clib_bihash_add_or_overwrite_stale_16_8
	  (&tsm->out2in_ed, &out2in_ed_kv, nat44_o2i_ed_is_idle_session_cb,
	   &ctx))
	nat_elog_notice ("out2in-ed key add failed");
    }

  if (lb)
    s->flags |= SNAT_SESSION_FLAG_LOAD_BALANCING;
  s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
  s->ext_host_addr = r_addr;
  s->ext_host_port = r_port;
  s->in2out = key0;
  s->out2in = key1;
  s->out2in.protocol = key0.protocol;

  clib_bihash_kv_16_8_t in2out_ed_kv;
  make_ed_kv (&l_addr, &r_addr, proto, rx_fib_index, l_port, r_port,
	      s - tsm->sessions, &in2out_ed_kv);
  ctx.now = now;
  ctx.thread_index = thread_index;
  if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->in2out_ed, &in2out_ed_kv,
					       nat44_i2o_ed_is_idle_session_cb,
					       &ctx))
    nat_elog_notice ("in2out-ed key add failed");

  *sessionp = s;

  /* log NAT event */
  snat_ipfix_logging_nat44_ses_create (thread_index,
				       s->in2out.addr.as_u32,
				       s->out2in.addr.as_u32,
				       s->in2out.protocol,
				       s->in2out.port,
				       s->out2in.port, s->in2out.fib_index);

  nat_syslog_nat44_sadd (s->user_index, s->in2out.fib_index,
			 &s->in2out.addr, s->in2out.port,
			 &s->ext_host_nat_addr, s->ext_host_nat_port,
			 &s->out2in.addr, s->out2in.port,
			 &s->ext_host_addr, s->ext_host_port,
			 s->in2out.protocol, 0);

  nat_ha_sadd (&s->in2out.addr, s->in2out.port, &s->out2in.addr,
	       s->out2in.port, &s->ext_host_addr, s->ext_host_port,
	       &s->ext_host_nat_addr, s->ext_host_nat_port,
	       s->in2out.protocol, s->in2out.fib_index, s->flags,
	       thread_index, 0);

  return next;
}

static_always_inline int
nat44_ed_not_translate (snat_main_t * sm, vlib_node_runtime_t * node,
			u32 sw_if_index, ip4_header_t * ip, u32 proto,
			u32 rx_fib_index, u32 thread_index)
{
  udp_header_t *udp = ip4_next_header (ip);
  snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
  clib_bihash_kv_16_8_t kv, value;
  snat_session_key_t key0, key1;

  make_ed_kv (&ip->dst_address, &ip->src_address, ip->protocol,
	      sm->outside_fib_index, udp->dst_port, udp->src_port, ~0ULL,
	      &kv);

  /* NAT packet aimed at external address if has active sessions */
  if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value))
    {
      key0.addr = ip->dst_address;
      key0.port = udp->dst_port;
      key0.protocol = proto;
      key0.fib_index = sm->outside_fib_index;
      /* or is static mappings */
      if (!snat_static_mapping_match (sm, key0, &key1, 1, 0, 0, 0, 0, 0))
	return 0;
    }
  else
    return 0;

  if (sm->forwarding_enabled)
    return 1;

  return snat_not_translate_fast (sm, node, sw_if_index, ip, proto,
				  rx_fib_index);
}

static_always_inline int
nat_not_translate_output_feature_fwd (snat_main_t * sm, ip4_header_t * ip,
				      u32 thread_index, f64 now,
				      vlib_main_t * vm, vlib_buffer_t * b)
{
  clib_bihash_kv_16_8_t kv, value;
  snat_session_t *s = 0;
  snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];

  if (!sm->forwarding_enabled)
    return 0;

  if (ip->protocol == IP_PROTOCOL_ICMP)
    {
      if (get_icmp_i2o_ed_key (b, ip, 0, ~0ULL, 0, 0, 0, &kv))
	return 0;
    }
  else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP)
    {
      make_ed_kv (&ip->src_address, &ip->dst_address, ip->protocol, 0,
		  vnet_buffer (b)->ip.reass.l4_src_port,
		  vnet_buffer (b)->ip.reass.l4_dst_port, ~0ULL, &kv);
    }
  else
    {
      make_ed_kv (&ip->src_address, &ip->dst_address, ip->protocol, 0, 0,
		  0, ~0ULL, &kv);
    }

  if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
    {
      s = pool_elt_at_index (tsm->sessions, value.value);
      if (is_fwd_bypass_session (s))
	{
	  if (ip->protocol == IP_PROTOCOL_TCP)
	    {
	      if (nat44_set_tcp_session_state_i2o
		  (sm, now, s, b, thread_index))
		return 1;
	    }
	  /* Accounting */
	  nat44_session_update_counters (s, now,
					 vlib_buffer_length_in_chain (vm, b),
					 thread_index);
	  /* Per-user LRU list maintenance */
	  nat44_session_update_lru (sm, s, thread_index);
	  return 1;
	}
      else
	return 0;
    }

  return 0;
}

static_always_inline int
nat44_ed_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip,
				       u16 src_port, u16 dst_port,
				       u32 thread_index, u32 rx_sw_if_index,
				       u32 tx_sw_if_index)
{
  clib_bihash_kv_16_8_t kv, value;
  snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
  snat_interface_t *i;
  snat_session_t *s;
  u32 rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (rx_sw_if_index);
  u32 tx_fib_index = ip4_fib_table_get_index_for_sw_if_index (tx_sw_if_index);

  /* src NAT check */
  make_ed_kv (&ip->src_address, &ip->dst_address, ip->protocol,
	      tx_fib_index, src_port, dst_port, ~0ULL, &kv);
  if (!clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value))
    {
      s = pool_elt_at_index (tsm->sessions, value.value);
      if (nat44_is_ses_closed (s))
	{
	  nat_free_session_data (sm, s, thread_index, 0);
	  nat44_ed_delete_session (sm, s, thread_index, 1);
	}
      else
	s->flags |= SNAT_SESSION_FLAG_OUTPUT_FEATURE;
      return 1;
    }

  /* dst NAT check */
  make_ed_kv (&ip->dst_address, &ip->src_address, ip->protocol,
	      rx_fib_index, dst_port, src_port, ~0ULL, &kv);
  if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
    {
      s = pool_elt_at_index (tsm->sessions, value.value);
      if (is_fwd_bypass_session (s))
	return 0;

      /* hairpinning */
      /* *INDENT-OFF* */
      pool_foreach (i, sm->output_feature_interfaces,
      ({
        if ((nat_interface_is_inside (i)) && (rx_sw_if_index == i->sw_if_index))
           return 0;
      }));
      /* *INDENT-ON* */
      return 1;
    }

  return 0;
}

#ifndef CLIB_MARCH_VARIANT
u32
icmp_match_in2out_ed (snat_main_t * sm, vlib_node_runtime_t * node,
		      u32 thread_index, vlib_buffer_t * b, ip4_header_t * ip,
		      u8 * p_proto, snat_session_key_t * p_value,
		      u8 * p_dont_translate, void *d, void *e)
{
  u32 sw_if_index;
  u32 rx_fib_index;
  snat_session_t *s = 0;
  u8 dont_translate = 0;
  clib_bihash_kv_16_8_t kv, value;
  u32 next = ~0;
  int err;
  u16 l_port = 0, r_port = 0;	// initialize to workaround gcc warning
  vlib_main_t *vm = vlib_get_main ();
  snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];

  sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
  rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index);

  err =
    get_icmp_i2o_ed_key (b, ip, rx_fib_index, ~0ULL, p_proto, &l_port,
			 &r_port, &kv);
  if (err != 0)
    {
      b->error = node->errors[err];
      next = NAT_NEXT_DROP;
      goto out;
    }

  if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
    {
      if (vnet_buffer (b)->sw_if_index[VLIB_TX] != ~0)
	{
	  if (PREDICT_FALSE
	      (nat44_ed_not_translate_output_feature
	       (sm, ip, l_port, r_port, thread_index,
		sw_if_index, vnet_buffer (b)->sw_if_index[VLIB_TX])))
	    {
	      dont_translate = 1;
	      goto out;
	    }
	}
      else
	{
	  if (PREDICT_FALSE (nat44_ed_not_translate (sm, node, sw_if_index,
						     ip, SNAT_PROTOCOL_ICMP,
						     rx_fib_index,
						     thread_index)))
	    {
	      dont_translate = 1;
	      goto out;
	    }
	}

      if (PREDICT_FALSE
	  (icmp_type_is_error_message
	   (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags)))
	{
	  b->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE];
	  next = NAT_NEXT_DROP;
	  goto out;
	}

      next =
	slow_path_ed (sm, b, ip->src_address, ip->dst_address, l_port, r_port,
		      ip->protocol, rx_fib_index, &s, node, next,
		      thread_index, vlib_time_now (vm));

      if (PREDICT_FALSE (next == NAT_NEXT_DROP))
	goto out;

      if (!s)
	{
	  dont_translate = 1;
	  goto out;
	}
    }
  else
    {
      if (PREDICT_FALSE
	  (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags !=
	   ICMP4_echo_request
	   && vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags !=
	   ICMP4_echo_reply
	   && !icmp_type_is_error_message (vnet_buffer (b)->ip.
					   reass.icmp_type_or_tcp_flags)))
	{
	  b->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE];
	  next = NAT_NEXT_DROP;
	  goto out;
	}

      s = pool_elt_at_index (tsm->sessions, value.value);
    }
out:
  if (s)
    *p_value = s->out2in;
  *p_dont_translate = dont_translate;
  if (d)
    *(snat_session_t **) d = s;
  return next;
}
#endif

static snat_session_t *
nat44_ed_in2out_unknown_proto (snat_main_t * sm,
			       vlib_buffer_t * b,
			       ip4_header_t * ip,
			       u32 rx_fib_index,
			       u32 thread_index,
			       f64 now,
			       vlib_main_t * vm, vlib_node_runtime_t * node)
{
  clib_bihash_kv_8_8_t kv, value;
  clib_bihash_kv_16_8_t s_kv, s_value;
  snat_static_mapping_t *m;
  u32 old_addr, new_addr = 0;
  ip_csum_t sum;
  snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
  snat_session_t *s;
  u32 outside_fib_index = sm->outside_fib_index;
  int i;
  u8 is_sm = 0;
  nat_outside_fib_t *outside_fib;
  fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
  fib_prefix_t pfx = {
    .fp_proto = FIB_PROTOCOL_IP4,
    .fp_len = 32,
    .fp_addr = {
		.ip4.as_u32 = ip->dst_address.as_u32,
		},
  };

  switch (vec_len (sm->outside_fibs))
    {
    case 0:
      outside_fib_index = sm->outside_fib_index;
      break;
    case 1:
      outside_fib_index = sm->outside_fibs[0].fib_index;
      break;
    default:
      /* *INDENT-OFF* */
      vec_foreach (outside_fib, sm->outside_fibs)
        {
	  fei = fib_table_lookup (outside_fib->fib_index, &pfx);
	  if (FIB_NODE_INDEX_INVALID != fei)
	    {
	      if (fib_entry_get_resolving_interface (fei) != ~0)
	        {
		  outside_fib_index = outside_fib->fib_index;
		  break;
	        }
	    }
        }
      /* *INDENT-ON* */
      break;
    }
  old_addr = ip->src_address.as_u32;

  make_ed_kv (&ip->src_address, &ip->dst_address, ip->protocol,
	      rx_fib_index, 0, 0, ~0ULL, &s_kv);

  if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &s_kv, &s_value))
    {
      s = pool_elt_at_index (tsm->sessions, s_value.value);
      new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32;
    }
  else
    {
      if (PREDICT_FALSE
	  (nat44_ed_maximum_sessions_exceeded
	   (sm, rx_fib_index, thread_index)))
	{
	  b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED];
	  nat_ipfix_logging_max_sessions (thread_index, sm->max_translations);
	  nat_elog_notice ("maximum sessions exceeded");
	  return 0;
	}

      make_sm_kv (&kv, &ip->src_address, 0, rx_fib_index, 0);

      /* Try to find static mapping first */
      if (!clib_bihash_search_8_8 (&sm->static_mapping_by_local, &kv, &value))
	{
	  m = pool_elt_at_index (sm->static_mappings, value.value);
	  new_addr = ip->src_address.as_u32 = m->external_addr.as_u32;
	  is_sm = 1;
	  goto create_ses;
	}
      else
	{
	  /* *INDENT-OFF* */
	  pool_foreach (s, tsm->sessions, {
      	    if (s->ext_host_addr.as_u32 == ip->dst_address.as_u32)
      	      {
      	        new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32;

      	        make_ed_kv (&s->out2in.addr, &ip->dst_address, ip->protocol,
      	                    outside_fib_index, 0, 0, ~0ULL, &s_kv);
      	        if (clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value))
      	          goto create_ses;

      	        break;
      	      }
      	  });
      	  /* *INDENT-ON* */

	  for (i = 0; i < vec_len (sm->addresses); i++)
	    {
	      make_ed_kv (&sm->addresses[i].addr, &ip->dst_address,
			  ip->protocol, outside_fib_index, 0, 0, ~0ULL,
			  &s_kv);
	      if (clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value))
		{
		  new_addr = ip->src_address.as_u32 =
		    sm->addresses[i].addr.as_u32;
		  goto create_ses;
		}
	    }
	  return 0;
	}

    create_ses:
      s = nat_ed_session_alloc (sm, thread_index, now);
      if (!s)
	{
	  b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_USER_SESS_EXCEEDED];
	  nat_elog_warn ("create NAT session failed");
	  return 0;
	}

      s->ext_host_addr.as_u32 = ip->dst_address.as_u32;
      s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO;
      s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
      s->out2in.addr.as_u32 = new_addr;
      s->out2in.fib_index = outside_fib_index;
      s->in2out.addr.as_u32 = old_addr;
      s->in2out.fib_index = rx_fib_index;
      s->in2out.port = s->out2in.port = ip->protocol;
      if (is_sm)
	s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;

      /* Add to lookup tables */
      make_ed_kv (&s->in2out.addr, &ip->dst_address, ip->protocol,
		  rx_fib_index, 0, 0, s - tsm->sessions, &s_kv);
      if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &s_kv, 1))
	nat_elog_notice ("in2out key add failed");

      make_ed_kv (&s->out2in.addr, &ip->dst_address, ip->protocol,
		  outside_fib_index, 0, 0, s - tsm->sessions, &s_kv);
      if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &s_kv, 1))
	nat_elog_notice ("out2in key add failed");
    }

  /* Update IP checksum */
  sum = ip->checksum;
  sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, src_address);
  ip->checksum = ip_csum_fold (sum);

  /* Accounting */
  nat44_session_update_counters (s, now, vlib_buffer_length_in_chain (vm, b),
				 thread_index);
  /* Per-user LRU list maintenance */
  nat44_session_update_lru (sm, s, thread_index);

  /* Hairpinning */
  if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0)
    nat44_ed_hairpinning_unknown_proto (sm, b, ip);

  if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0)
    vnet_buffer (b)->sw_if_index[VLIB_TX] = outside_fib_index;

  return s;
}

static inline uword
nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t * vm,
					  vlib_node_runtime_t * node,
					  vlib_frame_t * frame,
					  int is_output_feature)
{
  u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index;
  nat_next_t next_index;
  snat_main_t *sm = &snat_main;
  f64 now = vlib_time_now (vm);
  u32 thread_index = vm->thread_index;
  snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
  u32 tcp_packets = 0, udp_packets = 0, icmp_packets = 0, other_packets =
    0, def_slow;

  def_slow = is_output_feature ? NAT_NEXT_IN2OUT_ED_OUTPUT_SLOW_PATH :
    NAT_NEXT_IN2OUT_ED_SLOW_PATH;

  stats_node_index = sm->ed_in2out_node_index;

  from = vlib_frame_vector_args (frame);
  n_left_from = frame->n_vectors;
  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;
	  vlib_buffer_t *b0;
	  u32 next0, sw_if_index0, rx_fib_index0, iph_offset0 = 0, proto0,
	    new_addr0, old_addr0;
	  u16 old_port0, new_port0;
	  ip4_header_t *ip0;
	  udp_header_t *udp0;
	  tcp_header_t *tcp0;
	  snat_session_t *s0 = 0;
	  clib_bihash_kv_16_8_t kv0, value0;
	  ip_csum_t sum0;

	  /* speculatively enqueue b0 to the current next frame */
	  bi0 = from[0];
	  to_next[0] = bi0;
	  from += 1;
	  to_next += 1;
	  n_left_from -= 1;
	  n_left_to_next -= 1;

	  b0 = vlib_get_buffer (vm, bi0);

	  if (is_output_feature)
	    {
	      vnet_feature_next (&vnet_buffer2 (b0)->nat.arc_next, b0);
	      iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
	    }

	  next0 = vnet_buffer2 (b0)->nat.arc_next;

	  ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
				  iph_offset0);

	  sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
	  rx_fib_index0 =
	    fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
						 sw_if_index0);

	  if (PREDICT_FALSE (ip0->ttl == 1))
	    {
	      vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
	      icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
					   ICMP4_time_exceeded_ttl_exceeded_in_transit,
					   0);
	      next0 = NAT_NEXT_ICMP_ERROR;
	      goto trace0;
	    }

	  udp0 = ip4_next_header (ip0);
	  tcp0 = (tcp_header_t *) udp0;
	  proto0 = ip_proto_to_snat_proto (ip0->protocol);

	  if (PREDICT_FALSE (proto0 == ~0))
	    {
	      next0 = def_slow;
	      goto trace0;
	    }

	  if (is_output_feature)
	    {
	      if (PREDICT_FALSE (nat_not_translate_output_feature_fwd
				 (sm, ip0, thread_index, now, vm, b0)))
		goto trace0;
	    }

	  if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
	    {
	      next0 = def_slow;
	      goto trace0;
	    }

	  make_ed_kv (&ip0->src_address, &ip0->dst_address,
		      ip0->protocol, rx_fib_index0,
		      vnet_buffer (b0)->ip.reass.l4_src_port,
		      vnet_buffer (b0)->ip.reass.l4_dst_port, ~0ULL, &kv0);

	  // lookup for session
	  if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
	    {
	      // session does not exist go slow path
	      next0 = def_slow;
	      goto trace0;
	    }
	  s0 = pool_elt_at_index (tsm->sessions, value0.value);

	  if (s0->tcp_close_timestamp)
	    {
	      if (now >= s0->tcp_close_timestamp)
		{
		  // session is closed, go slow path
		  next0 = def_slow;
		}
	      else
		{
		  // session in transitory timeout, drop
		  b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TCP_CLOSED];
		  next0 = NAT_NEXT_DROP;
		}
	      goto trace0;
	    }

	  // drop if session expired
	  u64 sess_timeout_time;
	  sess_timeout_time = s0->last_heard +
	    (f64) nat44_session_get_timeout (sm, s0);
	  if (now >= sess_timeout_time)
	    {
	      nat_free_session_data (sm, s0, thread_index, 0);
	      nat44_ed_delete_session (sm, s0, thread_index, 1);
	      // session is closed, go slow path
	      next0 = def_slow;
	      goto trace0;
	    }

	  b0->flags |= VNET_BUFFER_F_IS_NATED;

	  if (!is_output_feature)
	    vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;

	  old_addr0 = ip0->src_address.as_u32;
	  new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32;
	  sum0 = ip0->checksum;
	  sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
				 src_address);
	  if (PREDICT_FALSE (is_twice_nat_session (s0)))
	    sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
				   s0->ext_host_addr.as_u32, ip4_header_t,
				   dst_address);
	  ip0->checksum = ip_csum_fold (sum0);

	  old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;

	  if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
	    {
	      if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
		{
		  new_port0 = udp0->src_port = s0->out2in.port;
		  sum0 = tcp0->checksum;
		  sum0 =
		    ip_csum_update (sum0, old_addr0, new_addr0,
				    ip4_header_t, dst_address);
		  sum0 =
		    ip_csum_update (sum0, old_port0, new_port0,
				    ip4_header_t, length);
		  if (PREDICT_FALSE (is_twice_nat_session (s0)))
		    {
		      sum0 =
			ip_csum_update (sum0, ip0->dst_address.as_u32,
					s0->ext_host_addr.as_u32,
					ip4_header_t, dst_address);
		      sum0 =
			ip_csum_update (sum0,
					vnet_buffer (b0)->ip.
					reass.l4_dst_port, s0->ext_host_port,
					ip4_header_t, length);
		      tcp0->dst_port = s0->ext_host_port;
		      ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
		    }
		  mss_clamping (sm, tcp0, &sum0);
		  tcp0->checksum = ip_csum_fold (sum0);
		}
	      tcp_packets++;
	      if (nat44_set_tcp_session_state_i2o
		  (sm, now, s0, b0, thread_index))
		goto trace0;
	    }
	  else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
		   && udp0->checksum)
	    {
	      new_port0 = udp0->src_port = s0->out2in.port;
	      sum0 = udp0->checksum;
	      sum0 =
		ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
				dst_address);
	      sum0 =
		ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
				length);
	      if (PREDICT_FALSE (is_twice_nat_session (s0)))
		{
		  sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
					 s0->ext_host_addr.as_u32,
					 ip4_header_t, dst_address);
		  sum0 =
		    ip_csum_update (sum0,
				    vnet_buffer (b0)->ip.reass.l4_dst_port,
				    s0->ext_host_port, ip4_header_t, length);
		  udp0->dst_port = s0->ext_host_port;
		  ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
		}
	      udp0->checksum = ip_csum_fold (sum0);
	      udp_packets++;
	    }
	  else
	    {
	      if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
		{
		  new_port0 = udp0->src_port = s0->out2in.port;
		  if (PREDICT_FALSE (is_twice_nat_session (s0)))
		    {
		      udp0->dst_port = s0->ext_host_port;
		      ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
		    }
		  udp_packets++;
		}
	    }

	  /* Accounting */
	  nat44_session_update_counters (s0, now,
					 vlib_buffer_length_in_chain
					 (vm, b0), thread_index);
	  /* Per-user LRU list maintenance */
	  nat44_session_update_lru (sm, s0, thread_index);

	trace0:
	  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
			     && (b0->flags & VLIB_BUFFER_IS_TRACED)))
	    {
	      nat_in2out_ed_trace_t *t =
		vlib_add_trace (vm, node, b0, sizeof (*t));
	      t->sw_if_index = sw_if_index0;
	      t->next_index = next0;
	      t->is_slow_path = 0;

	      if (s0)
		t->session_index = s0 - tsm->sessions;
	      else
		t->session_index = ~0;
	    }

	  pkts_processed += next0 == vnet_buffer2 (b0)->nat.arc_next;
	  /* verify speculative enqueue, maybe switch current next frame */
	  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, stats_node_index,
			       NAT_IN2OUT_ED_ERROR_IN2OUT_PACKETS,
			       pkts_processed);
  vlib_node_increment_counter (vm, stats_node_index,
			       NAT_IN2OUT_ED_ERROR_TCP_PACKETS, tcp_packets);
  vlib_node_increment_counter (vm, stats_node_index,
			       NAT_IN2OUT_ED_ERROR_UDP_PACKETS, udp_packets);
  vlib_node_increment_counter (vm, stats_node_index,
			       NAT_IN2OUT_ED_ERROR_ICMP_PACKETS,
			       icmp_packets);
  vlib_node_increment_counter (vm, stats_node_index,
			       NAT_IN2OUT_ED_ERROR_OTHER_PACKETS,
			       other_packets);
  return frame->n_vectors;
}

static inline uword
nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t * vm,
					  vlib_node_runtime_t * node,
					  vlib_frame_t * frame,
					  int is_output_feature)
{
  u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index;
  nat_next_t next_index;
  snat_main_t *sm = &snat_main;
  f64 now = vlib_time_now (vm);
  u32 thread_index = vm->thread_index;
  snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
  u32 tcp_packets = 0, udp_packets = 0, icmp_packets = 0, other_packets = 0;

  stats_node_index = sm->ed_in2out_slowpath_node_index;

  from = vlib_frame_vector_args (frame);
  n_left_from = frame->n_vectors;
  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;
	  vlib_buffer_t *b0;
	  u32 next0, sw_if_index0, rx_fib_index0, iph_offset0 = 0, proto0,
	    new_addr0, old_addr0;
	  u16 old_port0, new_port0;
	  ip4_header_t *ip0;
	  udp_header_t *udp0;
	  tcp_header_t *tcp0;
	  icmp46_header_t *icmp0;
	  snat_session_t *s0 = 0;
	  clib_bihash_kv_16_8_t kv0, value0;
	  ip_csum_t sum0;

	  /* speculatively enqueue b0 to the current next frame */
	  bi0 = from[0];
	  to_next[0] = bi0;
	  from += 1;
	  to_next += 1;
	  n_left_from -= 1;
	  n_left_to_next -= 1;

	  b0 = vlib_get_buffer (vm, bi0);

	  if (is_output_feature)
	    iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;

	  next0 = vnet_buffer2 (b0)->nat.arc_next;

	  ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
				  iph_offset0);

	  sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
	  rx_fib_index0 =
	    fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
						 sw_if_index0);

	  if (PREDICT_FALSE (ip0->ttl == 1))
	    {
	      vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
	      icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
					   ICMP4_time_exceeded_ttl_exceeded_in_transit,
					   0);
	      next0 = NAT_NEXT_ICMP_ERROR;
	      goto trace0;
	    }

	  udp0 = ip4_next_header (ip0);
	  tcp0 = (tcp_header_t *) udp0;
	  icmp0 = (icmp46_header_t *) udp0;
	  proto0 = ip_proto_to_snat_proto (ip0->protocol);

	  if (PREDICT_FALSE (proto0 == ~0))
	    {
	      s0 = nat44_ed_in2out_unknown_proto (sm, b0, ip0,
						  rx_fib_index0,
						  thread_index, now,
						  vm, node);
	      if (!s0)
		next0 = NAT_NEXT_DROP;

	      other_packets++;
	      goto trace0;
	    }

	  if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
	    {
	      next0 = icmp_in2out_ed_slow_path
		(sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0,
		 node, next0, now, thread_index, &s0);
	      icmp_packets++;
	      goto trace0;
	    }

	  // move down
	  make_ed_kv (&ip0->src_address, &ip0->dst_address,
		      ip0->protocol, rx_fib_index0,
		      vnet_buffer (b0)->ip.reass.l4_src_port,
		      vnet_buffer (b0)->ip.reass.l4_dst_port, ~0ULL, &kv0);

	  if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
	    {
	      s0 = pool_elt_at_index (tsm->sessions, value0.value);

	      if (s0->tcp_close_timestamp && now >= s0->tcp_close_timestamp)
		{
		  nat_free_session_data (sm, s0, thread_index, 0);
		  nat44_ed_delete_session (sm, s0, thread_index, 1);
		  s0 = NULL;
		}
	    }

	  if (!s0)
	    {
	      if (is_output_feature)
		{
		  if (PREDICT_FALSE
		      (nat44_ed_not_translate_output_feature
		       (sm, ip0, vnet_buffer (b0)->ip.reass.l4_src_port,
			vnet_buffer (b0)->ip.reass.l4_dst_port, thread_index,
			sw_if_index0,
			vnet_buffer (b0)->sw_if_index[VLIB_TX])))
		    goto trace0;

		  /*
		   * Send DHCP packets to the ipv4 stack, or we won't
		   * be able to use dhcp client on the outside interface
		   */
		  if (PREDICT_FALSE
		      (proto0 == SNAT_PROTOCOL_UDP
		       && (vnet_buffer (b0)->ip.reass.l4_dst_port ==
			   clib_host_to_net_u16 (UDP_DST_PORT_dhcp_to_server))
		       && ip0->dst_address.as_u32 == 0xffffffff))
		    goto trace0;
		}
	      else
		{
		  if (PREDICT_FALSE
		      (nat44_ed_not_translate
		       (sm, node, sw_if_index0, ip0, proto0, rx_fib_index0,
			thread_index)))
		    goto trace0;
		}

	      next0 =
		slow_path_ed (sm, b0, ip0->src_address, ip0->dst_address,
			      vnet_buffer (b0)->ip.reass.l4_src_port,
			      vnet_buffer (b0)->ip.reass.l4_dst_port,
			      ip0->protocol, rx_fib_index0, &s0, node, next0,
			      thread_index, now);

	      if (PREDICT_FALSE (next0 == NAT_NEXT_DROP))
		goto trace0;

	      if (PREDICT_FALSE (!s0))
		goto trace0;

	    }

	  b0->flags |= VNET_BUFFER_F_IS_NATED;

	  if (!is_output_feature)
	    vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;

	  old_addr0 = ip0->src_address.as_u32;
	  new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32;
	  sum0 = ip0->checksum;
	  sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
				 src_address);
	  if (PREDICT_FALSE (is_twice_nat_session (s0)))
	    sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
				   s0->ext_host_addr.as_u32, ip4_header_t,
				   dst_address);
	  ip0->checksum = ip_csum_fold (sum0);

	  old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;

	  if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
	    {
	      if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
		{
		  new_port0 = udp0->src_port = s0->out2in.port;
		  sum0 = tcp0->checksum;
		  sum0 =
		    ip_csum_update (sum0, old_addr0, new_addr0,
				    ip4_header_t, dst_address);
		  sum0 =
		    ip_csum_update (sum0, old_port0, new_port0,
				    ip4_header_t, length);
		  if (PREDICT_FALSE (is_twice_nat_session (s0)))
		    {
		      sum0 =
			ip_csum_update (sum0, ip0->dst_address.as_u32,
					s0->ext_host_addr.as_u32,
					ip4_header_t, dst_address);
		      sum0 =
			ip_csum_update (sum0,
					vnet_buffer (b0)->ip.
					reass.l4_dst_port, s0->ext_host_port,
					ip4_header_t, length);
		      tcp0->dst_port = s0->ext_host_port;
		      ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
		    }
		  mss_clamping (sm, tcp0, &sum0);
		  tcp0->checksum = ip_csum_fold (sum0);
		}
	      tcp_packets++;
	      if (nat44_set_tcp_session_state_i2o
		  (sm, now, s0, b0, thread_index))
		goto trace0;
	    }
	  else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
		   && udp0->checksum)
	    {
	      new_port0 = udp0->src_port = s0->out2in.port;
	      sum0 = udp0->checksum;
	      sum0 =
		ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
				dst_address);
	      sum0 =
		ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
				length);
	      if (PREDICT_FALSE (is_twice_nat_session (s0)))
		{
		  sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
					 s0->ext_host_addr.as_u32,
					 ip4_header_t, dst_address);
		  sum0 =
		    ip_csum_update (sum0,
				    vnet_buffer (b0)->ip.reass.l4_dst_port,
				    s0->ext_host_port, ip4_header_t, length);
		  udp0->dst_port = s0->ext_host_port;
		  ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
		}
	      udp0->checksum = ip_csum_fold (sum0);
	      udp_packets++;
	    }
	  else
	    {
	      if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
		{
		  new_port0 = udp0->src_port = s0->out2in.port;
		  if (PREDICT_FALSE (is_twice_nat_session (s0)))
		    {
		      udp0->dst_port = s0->ext_host_port;
		      ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
		    }
		  udp_packets++;
		}
	    }

	  /* Accounting */
	  nat44_session_update_counters (s0, now,
					 vlib_buffer_length_in_chain
					 (vm, b0), thread_index);
	  /* Per-user LRU list maintenance */
	  nat44_session_update_lru (sm, s0, thread_index);

	trace0:
	  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
			     && (b0->flags & VLIB_BUFFER_IS_TRACED)))
	    {
	      nat_in2out_ed_trace_t *t =
		vlib_add_trace (vm, node, b0, sizeof (*t));
	      t->sw_if_index = sw_if_index0;
	      t->next_index = next0;
	      t->is_slow_path = 1;

	      if (s0)
		t->session_index = s0 - tsm->sessions;
	      else
		t->session_index = ~0;
	    }

	  pkts_processed += next0 == vnet_buffer2 (b0)->nat.arc_next;

	  /* verify speculative enqueue, maybe switch current next frame */
	  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, stats_node_index,
			       NAT_IN2OUT_ED_ERROR_IN2OUT_PACKETS,
			       pkts_processed);
  vlib_node_increment_counter (vm, stats_node_index,
			       NAT_IN2OUT_ED_ERROR_TCP_PACKETS, tcp_packets);
  vlib_node_increment_counter (vm, stats_node_index,
			       NAT_IN2OUT_ED_ERROR_UDP_PACKETS, udp_packets);
  vlib_node_increment_counter (vm, stats_node_index,
			       NAT_IN2OUT_ED_ERROR_ICMP_PACKETS,
			       icmp_packets);
  vlib_node_increment_counter (vm, stats_node_index,
			       NAT_IN2OUT_ED_ERROR_OTHER_PACKETS,
			       other_packets);
  return frame->n_vectors;
}

VLIB_NODE_FN (nat44_ed_in2out_node) (vlib_main_t * vm,
				     vlib_node_runtime_t * node,
				     vlib_frame_t * frame)
{
  return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 0);
}

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (nat44_ed_in2out_node) = {
  .name = "nat44-ed-in2out",
  .vector_size = sizeof (u32),
  .sibling_of = "nat-default",
  .format_trace = format_nat_in2out_ed_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
  .error_strings = nat_in2out_ed_error_strings,
  .runtime_data_bytes = sizeof (snat_runtime_t),
};
/* *INDENT-ON* */

VLIB_NODE_FN (nat44_ed_in2out_output_node) (vlib_main_t * vm,
					    vlib_node_runtime_t * node,
					    vlib_frame_t * frame)
{
  return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 1);
}

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (nat44_ed_in2out_output_node) = {
  .name = "nat44-ed-in2out-output",
  .vector_size = sizeof (u32),
  .sibling_of = "nat-default",
  .format_trace = format_nat_in2out_ed_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
  .error_strings = nat_in2out_ed_error_strings,
  .runtime_data_bytes = sizeof (snat_runtime_t),
};
/* *INDENT-ON* */

VLIB_NODE_FN (nat44_ed_in2out_slowpath_node) (vlib_main_t * vm,
					      vlib_node_runtime_t *
					      node, vlib_frame_t * frame)
{
  return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 0);
}

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (nat44_ed_in2out_slowpath_node) = {
  .name = "nat44-ed-in2out-slowpath",
  .vector_size = sizeof (u32),
  .sibling_of = "nat-default",
  .format_trace = format_nat_in2out_ed_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
  .error_strings = nat_in2out_ed_error_strings,
  .runtime_data_bytes = sizeof (snat_runtime_t),
};
/* *INDENT-ON* */

VLIB_NODE_FN (nat44_ed_in2out_output_slowpath_node) (vlib_main_t * vm,
						     vlib_node_runtime_t
						     * node,
						     vlib_frame_t * frame)
{
  return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 1);
}

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (nat44_ed_in2out_output_slowpath_node) = {
  .name = "nat44-ed-in2out-output-slowpath",
  .vector_size = sizeof (u32),
  .sibling_of = "nat-default",
  .format_trace = format_nat_in2out_ed_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
  .error_strings = nat_in2out_ed_error_strings,
  .runtime_data_bytes = sizeof (snat_runtime_t),
};
/* *INDENT-ON* */

static u8 *
format_nat_pre_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 *);
  nat_pre_trace_t *t = va_arg (*args, nat_pre_trace_t *);
  return format (s, "in2out next_index %d", t->next_index);
}

VLIB_NODE_FN (nat_pre_in2out_node)
  (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
{
  return nat_pre_node_fn_inline (vm, node, frame,
				 NAT_NEXT_IN2OUT_ED_FAST_PATH);
}

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (nat_pre_in2out_node) = {
  .name = "nat-pre-in2out",
  .vector_size = sizeof (u32),
  .sibling_of = "nat-default",
  .format_trace = format_nat_pre_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = 0,
};
/* *INDENT-ON* */

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