nat: nat66 to plugin

Type: refactor
Change-Id: I8c1f0c02a4522c1f9e461ddadd59938579ec00c6
Signed-off-by: Ole Troan <ot@cisco.com>

1 files changed, 0 insertions, 262 deletions

diff --git a/src/plugins/nat/nat66_in2out.c b/src/plugins/nat/nat66_in2out.c
deleted file mode 100644
index 437d66550f6..00000000000
--- a/src/plugins/nat/nat66_in2out.c
+++ /dev/null
@@ -1,262 +0,0 @@
-/*
- * 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 NAT66 inside to outside network translation
- */
-
-#include <nat/nat66.h>
-#include <vnet/ip/ip6_to_ip4.h>
-#include <vnet/fib/fib_table.h>
-
-typedef struct
-{
-  u32 sw_if_index;
-  u32 next_index;
-} nat66_in2out_trace_t;
-
-static u8 *
-format_nat66_in2out_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 *);
-  nat66_in2out_trace_t *t = va_arg (*args, nat66_in2out_trace_t *);
-
-  s =
-    format (s, "NAT66-in2out: sw_if_index %d, next index %d", t->sw_if_index,
-	    t->next_index);
-
-  return s;
-}
-
-#define foreach_nat66_in2out_error                       \
-_(IN2OUT_PACKETS, "good in2out packets processed")       \
-_(NO_TRANSLATION, "no translation")                      \
-_(UNKNOWN, "unknown")
-
-typedef enum
-{
-#define _(sym,str) NAT66_IN2OUT_ERROR_##sym,
-  foreach_nat66_in2out_error
-#undef _
-    NAT66_IN2OUT_N_ERROR,
-} nat66_in2out_error_t;
-
-static char *nat66_in2out_error_strings[] = {
-#define _(sym,string) string,
-  foreach_nat66_in2out_error
-#undef _
-};
-
-typedef enum
-{
-  NAT66_IN2OUT_NEXT_IP6_LOOKUP,
-  NAT66_IN2OUT_NEXT_DROP,
-  NAT66_IN2OUT_N_NEXT,
-} nat66_in2out_next_t;
-
-static inline u8
-nat66_not_translate (u32 rx_fib_index, ip6_address_t ip6_addr)
-{
-  nat66_main_t *nm = &nat66_main;
-  u32 sw_if_index;
-  snat_interface_t *i;
-  fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
-  fib_prefix_t pfx = {
-    .fp_proto = FIB_PROTOCOL_IP6,
-    .fp_len = 128,
-    .fp_addr = {
-		.ip6 = ip6_addr,
-		},
-  };
-
-  fei = fib_table_lookup (rx_fib_index, &pfx);
-  if (FIB_NODE_INDEX_INVALID == fei)
-    return 1;
-  sw_if_index = fib_entry_get_resolving_interface (fei);
-
-  if (sw_if_index == ~0)
-    {
-      fei = fib_table_lookup (nm->outside_fib_index, &pfx);
-      if (FIB_NODE_INDEX_INVALID == fei)
-	return 1;
-      sw_if_index = fib_entry_get_resolving_interface (fei);
-    }
-
-  /* *INDENT-OFF* */
-  pool_foreach (i, nm->interfaces,
-  ({
-    /* NAT packet aimed at outside interface */
-    if (nat_interface_is_outside (i) && sw_if_index == i->sw_if_index)
-      return 0;
-  }));
-  /* *INDENT-ON* */
-
-  return 1;
-}
-
-VLIB_NODE_FN (nat66_in2out_node) (vlib_main_t * vm,
-				  vlib_node_runtime_t * node,
-				  vlib_frame_t * frame)
-{
-  u32 n_left_from, *from, *to_next;
-  nat66_in2out_next_t next_index;
-  u32 pkts_processed = 0;
-  u32 thread_index = vm->thread_index;
-  nat66_main_t *nm = &nat66_main;
-
-  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 = NAT66_IN2OUT_NEXT_IP6_LOOKUP;
-	  ip6_header_t *ip60;
-	  u16 l4_offset0, frag_offset0;
-	  u8 l4_protocol0;
-	  nat66_static_mapping_t *sm0;
-	  u32 sw_if_index0, fib_index0;
-	  udp_header_t *udp0;
-	  tcp_header_t *tcp0;
-	  icmp46_header_t *icmp0;
-	  u16 *checksum0 = 0;
-	  ip_csum_t csum0;
-
-	  /* 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);
-	  ip60 = vlib_buffer_get_current (b0);
-
-	  if (PREDICT_FALSE
-	      (ip6_parse
-	       (vm, b0, ip60, b0->current_length, &l4_protocol0, &l4_offset0,
-		&frag_offset0)))
-	    {
-	      next0 = NAT66_IN2OUT_NEXT_DROP;
-	      b0->error = node->errors[NAT66_IN2OUT_ERROR_UNKNOWN];
-	      goto trace0;
-	    }
-
-	  sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
-	  fib_index0 =
-	    fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP6,
-						 sw_if_index0);
-
-	  if (nat66_not_translate (fib_index0, ip60->dst_address))
-	    goto trace0;
-
-	  sm0 = nat66_static_mapping_get (&ip60->src_address, fib_index0, 1);
-	  if (PREDICT_FALSE (!sm0))
-	    {
-	      goto trace0;
-	    }
-
-	  if (l4_protocol0 == IP_PROTOCOL_UDP)
-	    {
-	      udp0 = (udp_header_t *) u8_ptr_add (ip60, l4_offset0);
-	      checksum0 = &udp0->checksum;
-	    }
-	  else if (l4_protocol0 == IP_PROTOCOL_TCP)
-	    {
-	      tcp0 = (tcp_header_t *) u8_ptr_add (ip60, l4_offset0);
-	      checksum0 = &tcp0->checksum;
-	    }
-	  else if (l4_protocol0 == IP_PROTOCOL_ICMP6)
-	    {
-	      icmp0 = (icmp46_header_t *) u8_ptr_add (ip60, l4_offset0);
-	      checksum0 = &icmp0->checksum;
-	    }
-	  else
-	    goto skip_csum0;
-
-	  csum0 = ip_csum_sub_even (*checksum0, ip60->src_address.as_u64[0]);
-	  csum0 = ip_csum_sub_even (csum0, ip60->src_address.as_u64[1]);
-	  csum0 = ip_csum_add_even (csum0, sm0->e_addr.as_u64[0]);
-	  csum0 = ip_csum_add_even (csum0, sm0->e_addr.as_u64[1]);
-	  *checksum0 = ip_csum_fold (csum0);
-
-	skip_csum0:
-	  ip60->src_address.as_u64[0] = sm0->e_addr.as_u64[0];
-	  ip60->src_address.as_u64[1] = sm0->e_addr.as_u64[1];
-
-	  vlib_increment_combined_counter (&nm->session_counters,
-					   thread_index, sm0 - nm->sm, 1,
-					   vlib_buffer_length_in_chain (vm,
-									b0));
-
-	trace0:
-	  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
-			     && (b0->flags & VLIB_BUFFER_IS_TRACED)))
-	    {
-	      nat66_in2out_trace_t *t =
-		vlib_add_trace (vm, node, b0, sizeof (*t));
-	      t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
-	      t->next_index = next0;
-	    }
-
-	  pkts_processed += next0 != NAT66_IN2OUT_NEXT_DROP;
-
-	  /* 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, nm->in2out_node_index,
-			       NAT66_IN2OUT_ERROR_IN2OUT_PACKETS,
-			       pkts_processed);
-  return frame->n_vectors;
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (nat66_in2out_node) = {
-  .name = "nat66-in2out",
-  .vector_size = sizeof (u32),
-  .format_trace = format_nat66_in2out_trace,
-  .type = VLIB_NODE_TYPE_INTERNAL,
-  .n_errors = ARRAY_LEN (nat66_in2out_error_strings),
-  .error_strings = nat66_in2out_error_strings,
-  .n_next_nodes = NAT66_IN2OUT_N_NEXT,
-  /* edit / add dispositions here */
-  .next_nodes = {
-    [NAT66_IN2OUT_NEXT_DROP] = "error-drop",
-    [NAT66_IN2OUT_NEXT_IP6_LOOKUP] = "ip6-lookup",
-  },
-};
-/* *INDENT-ON* */
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */