nat: move dslite to separate sub-plugin

Type: refactor
Change-Id: If3d9f16f3a06c10b354f1eef674e8db5f3c44de7
Signed-off-by: Ole Troan <ot@cisco.com>

1 files changed, 0 insertions, 294 deletions

diff --git a/src/plugins/nat/dslite_out2in.c b/src/plugins/nat/dslite_out2in.c
deleted file mode 100644
index 265d79fc53e..00000000000
--- a/src/plugins/nat/dslite_out2in.c
+++ /dev/null
@@ -1,294 +0,0 @@
-/*
- * Copyright (c) 2017 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 <nat/dslite.h>
-#include <nat/nat_inlines.h>
-
-typedef enum
-{
-  DSLITE_OUT2IN_NEXT_IP4_LOOKUP,
-  DSLITE_OUT2IN_NEXT_IP6_LOOKUP,
-  DSLITE_OUT2IN_NEXT_DROP,
-  DSLITE_OUT2IN_N_NEXT,
-} dslite_out2in_next_t;
-
-static char *dslite_out2in_error_strings[] = {
-#define _(sym,string) string,
-  foreach_dslite_error
-#undef _
-};
-
-static inline u32
-dslite_icmp_out2in (dslite_main_t * dm, ip4_header_t * ip4,
-		    dslite_session_t ** sp, u32 next, u8 * error,
-		    u32 thread_index)
-{
-  dslite_session_t *s = 0;
-  icmp46_header_t *icmp = ip4_next_header (ip4);
-  clib_bihash_kv_8_8_t kv, value;
-  snat_session_key_t key;
-  u32 n = next;
-  icmp_echo_header_t *echo;
-  u32 new_addr, old_addr;
-  u16 old_id, new_id;
-  ip_csum_t sum;
-
-  echo = (icmp_echo_header_t *) (icmp + 1);
-
-  if (icmp_type_is_error_message (icmp->type)
-      || (icmp->type != ICMP4_echo_reply))
-    {
-      n = DSLITE_OUT2IN_NEXT_DROP;
-      *error = DSLITE_ERROR_BAD_ICMP_TYPE;
-      goto done;
-    }
-
-  key.addr = ip4->dst_address;
-  key.port = echo->identifier;
-  key.protocol = SNAT_PROTOCOL_ICMP;
-  key.fib_index = 0;
-  kv.key = key.as_u64;
-
-  if (clib_bihash_search_8_8
-      (&dm->per_thread_data[thread_index].out2in, &kv, &value))
-    {
-      next = DSLITE_OUT2IN_NEXT_DROP;
-      *error = DSLITE_ERROR_NO_TRANSLATION;
-      goto done;
-    }
-  else
-    {
-      s =
-	pool_elt_at_index (dm->per_thread_data[thread_index].sessions,
-			   value.value);
-    }
-
-  old_id = echo->identifier;
-  echo->identifier = new_id = s->in2out.port;
-  sum = icmp->checksum;
-  sum = ip_csum_update (sum, old_id, new_id, icmp_echo_header_t, identifier);
-  icmp->checksum = ip_csum_fold (sum);
-
-  old_addr = ip4->dst_address.as_u32;
-  ip4->dst_address = s->in2out.addr;
-  new_addr = ip4->dst_address.as_u32;
-
-  sum = ip4->checksum;
-  sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, dst_address);
-  ip4->checksum = ip_csum_fold (sum);
-
-done:
-  *sp = s;
-  return n;
-}
-
-VLIB_NODE_FN (dslite_out2in_node) (vlib_main_t * vm,
-				   vlib_node_runtime_t * node,
-				   vlib_frame_t * frame)
-{
-  u32 n_left_from, *from, *to_next;
-  dslite_out2in_next_t next_index;
-  vlib_node_runtime_t *error_node;
-  u32 thread_index = vm->thread_index;
-  f64 now = vlib_time_now (vm);
-  dslite_main_t *dm = &dslite_main;
-
-  error_node = vlib_node_get_runtime (vm, dm->dslite_out2in_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 = DSLITE_OUT2IN_NEXT_IP6_LOOKUP;
-	  u8 error0 = DSLITE_ERROR_OUT2IN;
-	  ip4_header_t *ip40;
-	  ip6_header_t *ip60;
-	  u32 proto0;
-	  udp_header_t *udp0;
-	  tcp_header_t *tcp0;
-	  clib_bihash_kv_8_8_t kv0, value0;
-	  snat_session_key_t key0;
-	  dslite_session_t *s0 = 0;
-	  ip_csum_t sum0;
-	  u32 new_addr0, old_addr0;
-	  u16 new_port0, old_port0;
-
-	  /* 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);
-	  ip40 = vlib_buffer_get_current (b0);
-	  proto0 = ip_proto_to_snat_proto (ip40->protocol);
-
-	  if (PREDICT_FALSE (proto0 == ~0))
-	    {
-	      error0 = DSLITE_ERROR_UNSUPPORTED_PROTOCOL;
-	      next0 = DSLITE_OUT2IN_NEXT_DROP;
-	      goto trace0;
-	    }
-
-	  if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
-	    {
-	      next0 =
-		dslite_icmp_out2in (dm, ip40, &s0, next0, &error0,
-				    thread_index);
-	      if (PREDICT_FALSE (next0 == DSLITE_OUT2IN_NEXT_DROP))
-		goto trace0;
-
-	      goto encap0;
-	    }
-
-	  udp0 = ip4_next_header (ip40);
-	  tcp0 = (tcp_header_t *) udp0;
-
-	  key0.addr = ip40->dst_address;
-	  key0.port = udp0->dst_port;
-	  key0.protocol = proto0;
-	  key0.fib_index = 0;
-	  kv0.key = key0.as_u64;
-
-	  if (clib_bihash_search_8_8
-	      (&dm->per_thread_data[thread_index].out2in, &kv0, &value0))
-	    {
-	      next0 = DSLITE_OUT2IN_NEXT_DROP;
-	      error0 = DSLITE_ERROR_NO_TRANSLATION;
-	      goto trace0;
-	    }
-	  else
-	    {
-	      s0 =
-		pool_elt_at_index (dm->per_thread_data[thread_index].sessions,
-				   value0.value);
-	    }
-
-	  old_addr0 = ip40->dst_address.as_u32;
-	  ip40->dst_address = s0->in2out.addr;
-	  new_addr0 = ip40->dst_address.as_u32;
-
-	  sum0 = ip40->checksum;
-	  sum0 =
-	    ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
-			    dst_address);
-	  ip40->checksum = ip_csum_fold (sum0);
-
-	  if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
-	    {
-	      old_port0 = tcp0->dst_port;
-	      tcp0->dst_port = s0->in2out.port;
-	      new_port0 = tcp0->dst_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);
-	      tcp0->checksum = ip_csum_fold (sum0);
-	    }
-	  else
-	    {
-	      old_port0 = udp0->dst_port;
-	      udp0->dst_port = s0->in2out.port;
-	      udp0->checksum = 0;
-	    }
-
-	encap0:
-	  /* Construct IPv6 header */
-	  vlib_buffer_advance (b0, -(sizeof (ip6_header_t)));
-	  ip60 = vlib_buffer_get_current (b0);
-	  ip60->ip_version_traffic_class_and_flow_label =
-	    clib_host_to_net_u32 ((6 << 28) + (ip40->tos << 20));
-	  ip60->payload_length = ip40->length;
-	  ip60->protocol = IP_PROTOCOL_IP_IN_IP;
-	  ip60->hop_limit = ip40->ttl;
-	  ip60->src_address.as_u64[0] = dm->aftr_ip6_addr.as_u64[0];
-	  ip60->src_address.as_u64[1] = dm->aftr_ip6_addr.as_u64[1];
-	  ip60->dst_address.as_u64[0] = s0->in2out.softwire_id.as_u64[0];
-	  ip60->dst_address.as_u64[1] = s0->in2out.softwire_id.as_u64[1];
-
-	  /* Accounting */
-	  s0->last_heard = now;
-	  s0->total_pkts++;
-	  s0->total_bytes += vlib_buffer_length_in_chain (vm, b0);
-	  /* Per-B4 LRU list maintenance */
-	  clib_dlist_remove (dm->per_thread_data[thread_index].list_pool,
-			     s0->per_b4_index);
-	  clib_dlist_addtail (dm->per_thread_data[thread_index].list_pool,
-			      s0->per_b4_list_head_index, s0->per_b4_index);
-	trace0:
-	  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
-			     && (b0->flags & VLIB_BUFFER_IS_TRACED)))
-	    {
-	      dslite_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
-	      t->next_index = next0;
-	      t->session_index = ~0;
-	      if (s0)
-		t->session_index =
-		  s0 - dm->per_thread_data[thread_index].sessions;
-	    }
-
-	  b0->error = error_node->errors[error0];
-
-	  /* 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);
-    }
-
-  return frame->n_vectors;
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (dslite_out2in_node) = {
-  .name = "dslite-out2in",
-  .vector_size = sizeof (u32),
-  .format_trace = format_dslite_trace,
-  .type = VLIB_NODE_TYPE_INTERNAL,
-  .n_errors = ARRAY_LEN (dslite_out2in_error_strings),
-  .error_strings = dslite_out2in_error_strings,
-  .n_next_nodes = DSLITE_OUT2IN_N_NEXT,
-  /* edit / add dispositions here */
-  .next_nodes = {
-    [DSLITE_OUT2IN_NEXT_DROP] = "error-drop",
-    [DSLITE_OUT2IN_NEXT_IP4_LOOKUP] = "ip4-lookup",
-    [DSLITE_OUT2IN_NEXT_IP6_LOOKUP] = "ip6-lookup",
-  },
-};
-/* *INDENT-ON* */
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */