/* * 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 outside to inside network translation */ #include #include #include #include #include #include #include #include #include #include #include #include #include static char *nat_out2in_ed_error_strings[] = { #define _(sym,string) string, foreach_nat_out2in_ed_error #undef _ }; typedef struct { u32 sw_if_index; u32 next_index; u32 session_index; nat_translation_error_e translation_error; nat_6t_flow_t i2of; nat_6t_flow_t o2if; clib_bihash_kv_16_8_t search_key; u8 is_slow_path; u8 translation_via_i2of; u8 lookup_skipped; } nat44_ed_out2in_trace_t; static u8 * format_nat44_ed_out2in_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 *); nat44_ed_out2in_trace_t *t = va_arg (*args, nat44_ed_out2in_trace_t *); char *tag; tag = t->is_slow_path ? "NAT44_OUT2IN_ED_SLOW_PATH" : "NAT44_OUT2IN_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); if (~0 != t->session_index) { s = format (s, ", translation result '%U' via %s", format_nat_ed_translation_error, t->translation_error, t->translation_via_i2of ? "i2of" : "o2if"); s = format (s, "\n i2of %U", format_nat_6t_flow, &t->i2of); s = format (s, "\n o2if %U", format_nat_6t_flow, &t->o2if); } if (!t->is_slow_path) { if (t->lookup_skipped) { s = format (s, "\n lookup skipped - cached session index used"); } else { s = format (s, "\n search key %U", format_ed_session_kvp, &t->search_key); } } return s; } static int next_src_nat (snat_main_t *sm, ip4_header_t *ip, u16 src_port, u16 dst_port, u32 thread_index, u32 rx_fib_index) { clib_bihash_kv_16_8_t kv, value; init_ed_k (&kv, ip->src_address, src_port, ip->dst_address, dst_port, rx_fib_index, ip->protocol); if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value)) return 1; return 0; } static void create_bypass_for_fwd (snat_main_t *sm, vlib_buffer_t *b, snat_session_t *s, ip4_header_t *ip, u32 rx_fib_index, u32 thread_index); static snat_session_t *create_session_for_static_mapping_ed ( snat_main_t *sm, vlib_buffer_t *b, ip4_address_t i2o_addr, u16 i2o_port, u32 i2o_fib_index, ip4_address_t o2i_addr, u16 o2i_port, u32 o2i_fib_index, nat_protocol_t nat_proto, vlib_node_runtime_t *node, u32 rx_fib_index, u32 thread_index, twice_nat_type_t twice_nat, lb_nat_type_t lb_nat, f64 now, snat_static_mapping_t *mapping); static inline u32 icmp_out2in_ed_slow_path (snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip, icmp46_header_t *icmp, u32 sw_if_index, u32 rx_fib_index, vlib_node_runtime_t *node, u32 next, f64 now, u32 thread_index, snat_session_t **s_p) { vlib_main_t *vm = vlib_get_main (); ip_csum_t sum; u16 checksum; snat_session_t *s = 0; u8 is_addr_only, identity_nat; ip4_address_t sm_addr; u16 sm_port; u32 sm_fib_index; snat_static_mapping_t *m; u8 lookup_protocol; ip4_address_t lookup_saddr, lookup_daddr; u16 lookup_sport, lookup_dport; 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); if (nat_get_icmp_session_lookup_values (b, ip, &lookup_saddr, &lookup_sport, &lookup_daddr, &lookup_dport, &lookup_protocol)) { b->error = node->errors[NAT_OUT2IN_ED_ERROR_UNSUPPORTED_PROTOCOL]; next = NAT_NEXT_DROP; goto out; } if (snat_static_mapping_match ( sm, ip->dst_address, lookup_sport, rx_fib_index, ip_proto_to_nat_proto (ip->protocol), &sm_addr, &sm_port, &sm_fib_index, 1, &is_addr_only, 0, 0, 0, &identity_nat, &m)) { // static mapping not matched if (!sm->forwarding_enabled) { /* Don't NAT packet aimed at the intfc address */ if (!is_interface_addr (sm, node, sw_if_index, ip->dst_address.as_u32)) { b->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; next = NAT_NEXT_DROP; } } else { if (next_src_nat (sm, ip, lookup_sport, lookup_dport, thread_index, rx_fib_index)) { next = NAT_NEXT_IN2OUT_ED_FAST_PATH; } else { create_bypass_for_fwd (sm, b, s, ip, rx_fib_index, thread_index); } } goto out; } if (PREDICT_FALSE (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags != ICMP4_echo_reply && (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags != ICMP4_echo_request || !is_addr_only))) { b->error = node->errors[NAT_OUT2IN_ED_ERROR_BAD_ICMP_TYPE]; next = NAT_NEXT_DROP; goto out; } if (PREDICT_FALSE (identity_nat)) { goto out; } /* Create session initiated by host from external network */ s = create_session_for_static_mapping_ed ( sm, b, sm_addr, sm_port, sm_fib_index, ip->dst_address, lookup_sport, rx_fib_index, ip_proto_to_nat_proto (lookup_protocol), node, rx_fib_index, thread_index, 0, 0, vlib_time_now (vm), m); if (!s) next = NAT_NEXT_DROP; if (PREDICT_TRUE (!ip4_is_fragment (ip))) { sum = ip_incremental_checksum_buffer ( vm, b, (u8 *) icmp - (u8 *) vlib_buffer_get_current (b), ntohs (ip->length) - ip4_header_bytes (ip), 0); checksum = ~ip_csum_fold (sum); if (checksum != 0 && checksum != 0xffff) { next = NAT_NEXT_DROP; goto out; } } if (PREDICT_TRUE (next != NAT_NEXT_DROP && s)) { /* 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); } out: if (NAT_NEXT_DROP == next && s) { nat_ed_session_delete (sm, s, thread_index, 1); s = 0; } *s_p = s; return next; } // allocate exact address based on preference static_always_inline int nat_alloc_addr_and_port_exact (snat_address_t * a, u32 thread_index, nat_protocol_t proto, ip4_address_t * addr, u16 * port, u16 port_per_thread, u32 snat_thread_index) { u32 portnum; switch (proto) { #define _(N, j, n, s) \ case NAT_PROTOCOL_##N: \ if (a->busy_##n##_ports_per_thread[thread_index] < port_per_thread) \ { \ while (1) \ { \ portnum = (port_per_thread * \ snat_thread_index) + \ snat_random_port(0, port_per_thread - 1) + 1024; \ if (a->busy_##n##_port_refcounts[portnum]) \ continue; \ --a->busy_##n##_port_refcounts[portnum]; \ a->busy_##n##_ports_per_thread[thread_index]++; \ a->busy_##n##_ports++; \ *addr = a->addr; \ *port = clib_host_to_net_u16(portnum); \ return 0; \ } \ } \ break; foreach_nat_protocol #undef _ default: nat_elog_info ("unknown protocol"); return 1; } /* Totally out of translations to use... */ nat_ipfix_logging_addresses_exhausted (thread_index, 0); return 1; } static_always_inline int nat44_ed_alloc_outside_addr_and_port (snat_address_t *addresses, u32 fib_index, u32 thread_index, nat_protocol_t proto, ip4_address_t *addr, u16 *port, u16 port_per_thread, u32 snat_thread_index) { int i; snat_address_t *a, *ga = 0; u32 portnum; for (i = 0; i < vec_len (addresses); i++) { a = addresses + i; switch (proto) { #define _(N, j, n, s) \ case NAT_PROTOCOL_##N: \ if (a->busy_##n##_ports_per_thread[thread_index] < port_per_thread) \ { \ if (a->fib_index == fib_index) \ { \ while (1) \ { \ portnum = (port_per_thread * snat_thread_index) + \ snat_random_port (0, port_per_thread - 1) + 1024; \ if (a->busy_##n##_port_refcounts[portnum]) \ continue; \ --a->busy_##n##_port_refcounts[portnum]; 
/*
 * 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.
 */
/*
 * srp_format.c: srp formatting/parsing.
 *
 * Copyright (c) 2008 Eliot Dresselhaus
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#include <vlib/vlib.h>
#include <vnet/srp/srp.h>
#include <vnet/ethernet/ethernet.h>

static u8 * format_srp_mode (u8 * s, va_list * args)
{
  u32 mode = va_arg (*args, u32);
  char * t = 0;
  switch (mode)
    {
#define _(f) case SRP_MODE_##f: t = #f; break;
  foreach_srp_mode
#undef _
    default: t = 0; break;
    }
  if (t)
    s = format (s, "%s", t);
  else
    s = format (s, "unknown 0x%x", mode);

  return s;
}

u8 * format_srp_header_with_length (u8 * s, va_list * args)
{
  srp_and_ethernet_header_t * h = va_arg (*args, srp_and_ethernet_header_t *);
  u32 max_header_bytes = va_arg (*args, u32);
  ethernet_main_t * em = &ethernet_main;
  u32 indent, header_bytes;

  header_bytes = sizeof (h[0]);
  if (max_header_bytes != 0 && header_bytes > max_header_bytes)
    return format (s, "srp header truncated");

  indent = format_get_indent (s);

  s = format (s, "mode %U, ring %s, priority %d, ttl %d",
	      format_srp_mode, h->srp.mode,
	      h->srp.is_inner_ring ? "inner" : "outer",
	      h->srp.priority, h->srp.ttl);

  s = format (s, "\n%U%U: %U -> %U",
	      format_white_space, indent,
	      format_ethernet_type, clib_net_to_host_u16 (h->ethernet.type),
	      format_ethernet_address, h->ethernet.src_address,
	      format_ethernet_address, h->ethernet.dst_address);

  if (max_header_bytes != 0 && header_bytes < max_header_bytes)
    {
      ethernet_type_info_t * ti;
      vlib_node_t * node;

      ti = ethernet_get_type_info (em, h->ethernet.type);
      node = ti ? vlib_get_node (em->vlib_main, ti->node_index) : 0;
      if (node && node->format_buffer)
	s = format (s, "\n%U%U",
		    format_white_space, indent,
		    node->format_buffer, (void *) h + header_bytes,
		    max_header_bytes - header_bytes);
    }

  return s;
}

u8 * format_srp_header (u8 * s, va_list * args)
{
  srp_header_t * m = va_arg (*args, srp_header_t *);
  return format (s, "%U", format_srp_header_with_length, m, 0);
}

uword
unformat_srp_header (unformat_input_t * input, va_list * args)
{
  u8 ** result = va_arg (*args, u8 **);
  srp_and_ethernet_header_t * h;

  {
    void * p;
    vec_add2 (*result, p, sizeof (h[0]));
    h = p;
  }

  if (! unformat (input, "%U: %U -> %U",
		  unformat_ethernet_type_net_byte_order, &h->ethernet.type,
		  unformat_ethernet_address, &h->ethernet.src_address,
		  unformat_ethernet_address, &h->ethernet.dst_address))
    return 0;

  h->srp.mode = SRP_MODE_data;
  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
    {
      u32 x;

      if (unformat (input, "control"))
	h->srp.mode = SRP_MODE_control_pass_to_host;
      
      else if (unformat (input, "pri %d", &x))
	h->srp.priority = x;

      else if (unformat (input, "ttl %d", &x))
	h->srp.ttl = x;

      else
	return 0;
    }

  return 1;
}
u16 nexts[VLIB_FRAME_SIZE], *next = nexts; vlib_get_buffers (vm, from, b, n_left_from); while (n_left_from > 0) { vlib_buffer_t *b0; u32 sw_if_index0, rx_fib_index0; nat_protocol_t proto0; ip4_header_t *ip0; udp_header_t *udp0; icmp46_header_t *icmp0; snat_session_t *s0 = 0; clib_bihash_kv_16_8_t kv0, value0; lb_nat_type_t lb_nat0; twice_nat_type_t twice_nat0; u8 identity_nat0; ip4_address_t sm_addr; u16 sm_port; u32 sm_fib_index; nat_translation_error_e translation_error = NAT_ED_TRNSL_ERR_SUCCESS; b0 = *b; next[0] = vnet_buffer2 (b0)->nat.arc_next; vnet_buffer (b0)->snat.flags = 0; ip0 = vlib_buffer_get_current (b0); 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); next[0] = NAT_NEXT_ICMP_ERROR; goto trace0; } udp0 = ip4_next_header (ip0); icmp0 = (icmp46_header_t *) udp0; proto0 = ip_proto_to_nat_proto (ip0->protocol); if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) { s0 = nat44_ed_out2in_slowpath_unknown_proto ( sm, b0, ip0, rx_fib_index0, thread_index, now, vm, node); if (!sm->forwarding_enabled) { if (!s0) next[0] = NAT_NEXT_DROP; } if (NAT_NEXT_DROP != next[0] && NAT_ED_TRNSL_ERR_SUCCESS != (translation_error = nat_6t_flow_buf_translate ( sm, b0, ip0, &s0->o2i, proto0, 0 /* is_output_feature */))) { goto trace0; } vlib_increment_simple_counter (&sm->counters.slowpath. out2in_ed.other, thread_index, sw_if_index0, 1); goto trace0; } if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) { next[0] = icmp_out2in_ed_slow_path (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, next[0], now, thread_index, &s0); if (NAT_NEXT_DROP != next[0] && s0 && NAT_ED_TRNSL_ERR_SUCCESS != (translation_error = nat_6t_flow_buf_translate ( sm, b0, ip0, &s0->o2i, proto0, 0 /* is_output_feature */))) { goto trace0; } vlib_increment_simple_counter (&sm->counters.slowpath. out2in_ed.icmp, thread_index, sw_if_index0, 1); goto trace0; } init_ed_k (&kv0, ip0->src_address, vnet_buffer (b0)->ip.reass.l4_src_port, ip0->dst_address, vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0, ip0->protocol); s0 = NULL; if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv0, &value0)) { ASSERT (thread_index == ed_value_get_thread_index (&value0)); s0 = pool_elt_at_index (tsm->sessions, ed_value_get_session_index (&value0)); if (s0->tcp_closed_timestamp && now >= s0->tcp_closed_timestamp) { nat_free_session_data (sm, s0, thread_index, 0); nat_ed_session_delete (sm, s0, thread_index, 1); s0 = NULL; } } if (!s0) { /* Try to match static mapping by external address and port, destination address and port in packet */ if (snat_static_mapping_match (sm, ip0->dst_address, vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0, proto0, &sm_addr, &sm_port, &sm_fib_index, 1, 0, &twice_nat0, &lb_nat0, &ip0->src_address, &identity_nat0, &m)) { /* * 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 == NAT_PROTOCOL_UDP && (vnet_buffer (b0)->ip.reass.l4_dst_port == clib_host_to_net_u16 (UDP_DST_PORT_dhcp_to_client)))) { goto trace0; } if (!sm->forwarding_enabled) { b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; next[0] = NAT_NEXT_DROP; } else { if (next_src_nat (sm, ip0, vnet_buffer (b0)->ip.reass.l4_src_port, vnet_buffer (b0)->ip.reass.l4_dst_port, thread_index, rx_fib_index0)) { next[0] = NAT_NEXT_IN2OUT_ED_FAST_PATH; } else { create_bypass_for_fwd (sm, b0, s0, ip0, rx_fib_index0, thread_index); } } goto trace0; } if (PREDICT_FALSE (identity_nat0)) goto trace0; if ((proto0 == NAT_PROTOCOL_TCP) && !tcp_flags_is_init (vnet_buffer (b0)->ip. reass.icmp_type_or_tcp_flags)) { b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN]; next[0] = NAT_NEXT_DROP; goto trace0; } /* Create session initiated by host from external network */ s0 = create_session_for_static_mapping_ed (sm, b0, sm_addr, sm_port, sm_fib_index, ip0->dst_address, vnet_buffer (b0)-> ip.reass.l4_dst_port, rx_fib_index0, proto0, node, rx_fib_index0, thread_index, twice_nat0, lb_nat0, now, m); if (!s0) { next[0] = NAT_NEXT_DROP; goto trace0; } } if (NAT_ED_TRNSL_ERR_SUCCESS != (translation_error = nat_6t_flow_buf_translate ( sm, b0, ip0, &s0->o2i, proto0, 0 /* is_output_feature */))) { next[0] = NAT_NEXT_DROP; goto trace0; } if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) { vlib_increment_simple_counter (&sm->counters.slowpath.out2in_ed.tcp, thread_index, sw_if_index0, 1); nat44_set_tcp_session_state_o2i (sm, now, s0, vnet_buffer (b0)->ip. reass.icmp_type_or_tcp_flags, vnet_buffer (b0)->ip. reass.tcp_ack_number, vnet_buffer (b0)->ip. reass.tcp_seq_number, thread_index); } else { vlib_increment_simple_counter (&sm->counters.slowpath.out2in_ed.udp, thread_index, sw_if_index0, 1); } /* 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))) { nat44_ed_out2in_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); t->sw_if_index = sw_if_index0; t->next_index = next[0]; t->is_slow_path = 1; t->translation_error = translation_error; clib_memcpy (&t->search_key, &kv0, sizeof (t->search_key)); if (s0) { t->session_index = s0 - tsm->sessions; clib_memcpy (&t->i2of, &s0->i2o, sizeof (t->i2of)); clib_memcpy (&t->o2if, &s0->o2i, sizeof (t->o2if)); } else { t->session_index = ~0; } } if (next[0] == NAT_NEXT_DROP) { vlib_increment_simple_counter (&sm->counters.slowpath. out2in_ed.drops, thread_index, sw_if_index0, 1); } n_left_from--; next++; b++; } vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts, frame->n_vectors); return frame->n_vectors; } VLIB_NODE_FN (nat44_ed_out2in_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { if (snat_main.num_workers > 1) { return nat44_ed_out2in_fast_path_node_fn_inline (vm, node, frame, 1); } else { return nat44_ed_out2in_fast_path_node_fn_inline (vm, node, frame, 0); } } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (nat44_ed_out2in_node) = { .name = "nat44-ed-out2in", .vector_size = sizeof (u32), .sibling_of = "nat-default", .format_trace = format_nat44_ed_out2in_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN(nat_out2in_ed_error_strings), .error_strings = nat_out2in_ed_error_strings, .runtime_data_bytes = sizeof (snat_runtime_t), }; /* *INDENT-ON* */ VLIB_NODE_FN (nat44_ed_out2in_slowpath_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return nat44_ed_out2in_slow_path_node_fn_inline (vm, node, frame); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (nat44_ed_out2in_slowpath_node) = { .name = "nat44-ed-out2in-slowpath", .vector_size = sizeof (u32), .sibling_of = "nat-default", .format_trace = format_nat44_ed_out2in_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN(nat_out2in_ed_error_strings), .error_strings = nat_out2in_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, "out2in next_index %d arc_next_index %d", t->next_index, t->arc_next_index); } VLIB_NODE_FN (nat_pre_out2in_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_OUT2IN_ED_FAST_PATH); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (nat_pre_out2in_node) = { .name = "nat-pre-out2in", .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: */