misc: Move l2tp to plugin

Type: refactor

Change-Id: Ifb36eeb146b87e9e305881429d32d6879e955e1e
Signed-off-by: Neale Ranns <nranns@cisco.com>

1 files changed, 0 insertions, 301 deletions

diff --git a/src/vnet/l2tp/decap.c b/src/vnet/l2tp/decap.c
deleted file mode 100644
index 787cc115a7e..00000000000
--- a/src/vnet/l2tp/decap.c
+++ /dev/null
@@ -1,301 +0,0 @@
-/*
- * decap.c : L2TPv3 tunnel decapsulation
- *
- * Copyright (c) 2013 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 <vppinfra/error.h>
-#include <vppinfra/hash.h>
-#include <vnet/vnet.h>
-#include <vnet/ip/ip.h>
-#include <vnet/ethernet/ethernet.h>
-#include <vnet/l2tp/l2tp.h>
-#include <vnet/l2/l2_input.h>
-
-/* Statistics (not really errors) */
-#define foreach_l2t_decap_error                                 \
-_(USER_TO_NETWORK, "L2TP user (ip6) to L2 network pkts")        \
-_(SESSION_ID_MISMATCH, "l2tpv3 local session id mismatches")    \
-_(COOKIE_MISMATCH, "l2tpv3 local cookie mismatches")            \
-_(NO_SESSION, "l2tpv3 session not found")                       \
-_(ADMIN_DOWN, "l2tpv3 tunnel is down")
-
-static char *l2t_decap_error_strings[] = {
-#define _(sym,string) string,
-  foreach_l2t_decap_error
-#undef _
-};
-
-typedef enum
-{
-#define _(sym,str) L2T_DECAP_ERROR_##sym,
-  foreach_l2t_decap_error
-#undef _
-    L2T_DECAP_N_ERROR,
-} l2t_DECAP_error_t;
-
-typedef enum
-{
-  L2T_DECAP_NEXT_DROP,
-  L2T_DECAP_NEXT_L2_INPUT,
-  L2T_DECAP_N_NEXT,
-  /* Pseudo next index */
-  L2T_DECAP_NEXT_NO_INTERCEPT = L2T_DECAP_N_NEXT,
-} l2t_decap_next_t;
-
-#define NSTAGES 3
-
-static inline void
-stage0 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_buffer_t * b)
-{
-  vlib_prefetch_buffer_header (b, STORE);
-  /* l2tpv3 header is a long way away, need 2 cache lines */
-  CLIB_PREFETCH (b->data, 2 * CLIB_CACHE_LINE_BYTES, STORE);
-}
-
-static inline void
-stage1 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_buffer_t * b)
-{
-  l2t_main_t *lm = &l2t_main;
-  ip6_header_t *ip6 = vlib_buffer_get_current (b);
-  u32 session_index;
-  uword *p = 0;
-  l2tpv3_header_t *l2t;
-
-  /* Not L2tpv3 (0x73, 0t115)? Use the normal path. */
-  if (PREDICT_FALSE (ip6->protocol != IP_PROTOCOL_L2TP))
-    {
-      vnet_buffer (b)->l2t.next_index = L2T_DECAP_NEXT_NO_INTERCEPT;
-      return;
-    }
-
-  /* Make up your minds, people... */
-  switch (lm->lookup_type)
-    {
-    case L2T_LOOKUP_SRC_ADDRESS:
-      p = hash_get_mem (lm->session_by_src_address, &ip6->src_address);
-      break;
-    case L2T_LOOKUP_DST_ADDRESS:
-      p = hash_get_mem (lm->session_by_dst_address, &ip6->dst_address);
-      break;
-    case L2T_LOOKUP_SESSION_ID:
-      l2t = (l2tpv3_header_t *) (ip6 + 1);
-      p = hash_get (lm->session_by_session_id, l2t->session_id);
-      break;
-    default:
-      ASSERT (0);
-    }
-
-  if (PREDICT_FALSE (p == 0))
-    {
-      vnet_buffer (b)->l2t.next_index = L2T_DECAP_NEXT_NO_INTERCEPT;
-      return;
-    }
-  else
-    {
-      session_index = p[0];
-    }
-
-  /* Remember mapping index, prefetch the mini counter */
-  vnet_buffer (b)->l2t.next_index = L2T_DECAP_NEXT_L2_INPUT;
-  vnet_buffer (b)->l2t.session_index = session_index;
-
-  /* $$$$$ prefetch counter */
-}
-
-static inline u32
-last_stage (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_buffer_t * b)
-{
-  l2t_main_t *lm = &l2t_main;
-  ip6_header_t *ip6 = vlib_buffer_get_current (b);
-  vlib_node_t *n = vlib_get_node (vm, node->node_index);
-  u32 node_counter_base_index = n->error_heap_index;
-  vlib_error_main_t *em = &vm->error_main;
-  l2tpv3_header_t *l2tp;
-  u32 counter_index;
-  l2t_session_t *session = 0;
-  u32 session_index;
-  u32 next_index;
-  u8 l2tp_decap_local = (l2t_decap_local_node.index == n->index);
-
-  /* Other-than-output pkt? We're done... */
-  if (vnet_buffer (b)->l2t.next_index != L2T_DECAP_NEXT_L2_INPUT)
-    {
-      next_index = vnet_buffer (b)->l2t.next_index;
-      goto done;
-    }
-
-  em->counters[node_counter_base_index + L2T_DECAP_ERROR_USER_TO_NETWORK] +=
-    1;
-
-  session_index = vnet_buffer (b)->l2t.session_index;
-
-  counter_index =
-    session_index_to_counter_index (session_index,
-				    SESSION_COUNTER_USER_TO_NETWORK);
-
-  /* per-mapping byte stats include the ethernet header */
-  vlib_increment_combined_counter (&lm->counter_main,
-				   vlib_get_thread_index (),
-				   counter_index, 1 /* packet_increment */ ,
-				   vlib_buffer_length_in_chain (vm, b) +
-				   sizeof (ethernet_header_t));
-
-  session = pool_elt_at_index (lm->sessions, session_index);
-
-  l2tp = vlib_buffer_get_current (b) + sizeof (*ip6);
-
-  if (PREDICT_FALSE (l2tp->session_id != session->local_session_id))
-    {
-      /* Key matched but session id does not. Assume packet is not for us. */
-      em->counters[node_counter_base_index +
-		   L2T_DECAP_ERROR_SESSION_ID_MISMATCH] += 1;
-      next_index = L2T_DECAP_NEXT_NO_INTERCEPT;
-      goto done;
-    }
-
-  if (PREDICT_FALSE (l2tp->cookie != session->local_cookie[0]))
-    {
-      if (l2tp->cookie != session->local_cookie[1])
-	{
-	  /* Key and session ID matched, but cookie doesn't. Drop this packet. */
-	  b->error = node->errors[L2T_DECAP_ERROR_COOKIE_MISMATCH];
-	  next_index = L2T_DECAP_NEXT_DROP;
-	  goto done;
-	}
-    }
-
-  vnet_buffer (b)->sw_if_index[VLIB_RX] = session->sw_if_index;
-
-  if (PREDICT_FALSE (!(session->admin_up)))
-    {
-      b->error = node->errors[L2T_DECAP_ERROR_ADMIN_DOWN];
-      next_index = L2T_DECAP_NEXT_DROP;
-      goto done;
-    }
-
-  /* strip the ip6 and L2TP header */
-  vlib_buffer_advance (b, sizeof (*ip6) + session->l2tp_hdr_size);
-
-  /* Required to make the l2 tag push / pop code work on l2 subifs */
-  vnet_update_l2_len (b);
-
-  if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED))
-    {
-      l2t_trace_t *t = vlib_add_trace (vm, node, b, sizeof (*t));
-      t->is_user_to_network = 1;
-      t->our_address.as_u64[0] = ip6->dst_address.as_u64[0];
-      t->our_address.as_u64[1] = ip6->dst_address.as_u64[1];
-      t->client_address.as_u64[0] = ip6->src_address.as_u64[0];
-      t->client_address.as_u64[1] = ip6->src_address.as_u64[1];
-      t->session_index = session_index;
-    }
-
-  return L2T_DECAP_NEXT_L2_INPUT;
-
-done:
-  if (next_index == L2T_DECAP_NEXT_NO_INTERCEPT)
-    {
-      /* Small behavioral change between l2tp-decap and l2tp-decap-local */
-      if (l2tp_decap_local)
-	{
-	  b->error = node->errors[L2T_DECAP_ERROR_NO_SESSION];
-	  next_index = L2T_DECAP_NEXT_DROP;
-	}
-      else
-	{
-	  /* Go to next node on the ip6 configuration chain */
-	  if (PREDICT_TRUE (session != 0))
-	    vnet_feature_next (&next_index, b);
-	}
-    }
-
-  if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED))
-    {
-      l2t_trace_t *t = vlib_add_trace (vm, node, b, sizeof (*t));
-      t->is_user_to_network = 1;
-      t->our_address.as_u64[0] = ip6->dst_address.as_u64[0];
-      t->our_address.as_u64[1] = ip6->dst_address.as_u64[1];
-      t->client_address.as_u64[0] = ip6->src_address.as_u64[0];
-      t->client_address.as_u64[1] = ip6->src_address.as_u64[1];
-      t->session_index = ~0;
-    }
-  return next_index;
-}
-
-#include <vnet/pipeline.h>
-
-VLIB_NODE_FN (l2t_decap_node) (vlib_main_t * vm,
-			       vlib_node_runtime_t * node,
-			       vlib_frame_t * frame)
-{
-  return dispatch_pipeline (vm, node, frame);
-}
-
-/*
- * l2tp-decap and l2tp-decap-local have very slightly different behavior.
- * When a packet has no associated session l2tp-decap let it go to ip6 forward,
- * while l2tp-decap-local drops it.
- */
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (l2t_decap_node) = {
-  .name = "l2tp-decap",
-  .vector_size = sizeof (u32),
-  .format_trace = format_l2t_trace,
-  .type = VLIB_NODE_TYPE_INTERNAL,
-
-  .n_errors = ARRAY_LEN(l2t_decap_error_strings),
-  .error_strings = l2t_decap_error_strings,
-
-  .n_next_nodes = L2T_DECAP_N_NEXT,
-
-  /* edit / add dispositions here */
-  .next_nodes = {
-        [L2T_DECAP_NEXT_L2_INPUT] = "l2-input",
-        [L2T_DECAP_NEXT_DROP] = "error-drop",
-  },
-};
-/* *INDENT-ON* */
-
-extern vlib_node_function_t l2t_decap_node_fn;
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (l2t_decap_local_node) = {
-  .function = l2t_decap_node_fn,
-  .name = "l2tp-decap-local",
-  .vector_size = sizeof (u32),
-  .format_trace = format_l2t_trace,
-  .type = VLIB_NODE_TYPE_INTERNAL,
-
-  .n_errors = ARRAY_LEN(l2t_decap_error_strings),
-  .error_strings = l2t_decap_error_strings,
-
-  .n_next_nodes = L2T_DECAP_N_NEXT,
-
-  /* edit / add dispositions here */
-  .next_nodes = {
-    [L2T_DECAP_NEXT_L2_INPUT] = "l2-input",
-    [L2T_DECAP_NEXT_DROP] = "error-drop",
-  },
-};
-/* *INDENT-ON* */
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */