teib: Rename NHRP to TEIB

Type: refactor

The Tunnel Endpoint Informatiob Base (TEIB) is a better
description of what it is (a mapping between tunnel endpoint
address, in the overlay, and next-hop address, in the underlay)
whereas NHRP is one instanc eof a control protocol that might add
such endpoints.

Signed-off-by: Neale Ranns <nranns@cisco.com>
Change-Id: Idcb2ad0b6543d3e5d9f6e96f9d14dafb5ce2aa85

1 files changed, 244 insertions, 0 deletions

diff --git a/src/vnet/teib/teib.c b/src/vnet/teib/teib.c
new file mode 100644
index 00000000000..e392b49e86b
--- /dev/null
+++ b/src/vnet/teib/teib.c
@@ -0,0 +1,244 @@
+/*
+ * teib.h: next-hop resolution
+ *
+ * Copyright (c) 2016 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 <vnet/teib/teib.h>
+#include <vnet/fib/fib_table.h>
+#include <vnet/adj/adj_midchain.h>
+
+typedef struct teib_key_t_
+{
+  ip46_address_t tk_peer;
+  u32 tk_sw_if_index;
+} teib_key_t;
+
+struct teib_entry_t_
+{
+  teib_key_t *te_key;
+  fib_prefix_t te_nh;
+  u32 te_fib_index;
+};
+
+static uword *teib_db;
+static teib_entry_t *teib_pool;
+static teib_vft_t *teib_vfts;
+
+#define TEIB_NOTIFY(_te, _fn) {                  \
+  teib_vft_t *_vft;                              \
+  vec_foreach(_vft, teib_vfts) {                 \
+    if (_vft->_fn) {                             \
+      _vft->_fn(_te);                            \
+    }                                            \
+  }                                              \
+}
+
+u32
+teib_entry_get_sw_if_index (const teib_entry_t * te)
+{
+  return (te->te_key->tk_sw_if_index);
+}
+
+u32
+teib_entry_get_fib_index (const teib_entry_t * te)
+{
+  return (te->te_fib_index);
+}
+
+const ip46_address_t *
+teib_entry_get_peer (const teib_entry_t * te)
+{
+  return (&te->te_key->tk_peer);
+}
+
+const fib_prefix_t *
+teib_entry_get_nh (const teib_entry_t * te)
+{
+  return (&te->te_nh);
+}
+
+void
+teib_entry_adj_stack (const teib_entry_t * te, adj_index_t ai)
+{
+  adj_midchain_delegate_stack (ai, te->te_fib_index, &te->te_nh);
+}
+
+teib_entry_t *
+teib_entry_get (index_t tei)
+{
+  return pool_elt_at_index (teib_pool, tei);
+}
+
+teib_entry_t *
+teib_entry_find (u32 sw_if_index, const ip46_address_t * peer)
+{
+  teib_key_t nk = {
+    .tk_peer = *peer,
+    .tk_sw_if_index = sw_if_index,
+  };
+  uword *p;
+
+  p = hash_get_mem (teib_db, &nk);
+
+  if (NULL != p)
+    return teib_entry_get (p[0]);
+
+  return (NULL);
+}
+
+int
+teib_entry_add (u32 sw_if_index,
+		const ip46_address_t * peer,
+		u32 nh_table_id, const ip46_address_t * nh)
+{
+  fib_protocol_t fproto;
+  teib_entry_t *te;
+  u32 fib_index;
+  index_t tei;
+
+  fproto = (ip46_address_is_ip4 (nh) ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6);
+
+  fib_index = fib_table_find (fproto, nh_table_id);
+
+  if (~0 == fib_index)
+    {
+      return (VNET_API_ERROR_NO_SUCH_FIB);
+    }
+
+  te = teib_entry_find (sw_if_index, peer);
+
+  if (NULL == te)
+    {
+      teib_key_t nk = {
+	.tk_peer = *peer,
+	.tk_sw_if_index = sw_if_index,
+      };
+      teib_entry_t *te;
+
+      pool_get_zero (teib_pool, te);
+
+      tei = te - teib_pool;
+      te->te_key = clib_mem_alloc (sizeof (*te->te_key));
+      clib_memcpy (te->te_key, &nk, sizeof (*te->te_key));
+
+      ip46_address_copy (&te->te_nh.fp_addr, nh);
+      te->te_nh.fp_proto = fproto;
+      te->te_nh.fp_len = (te->te_nh.fp_proto == FIB_PROTOCOL_IP4 ? 32 : 128);
+      te->te_fib_index = fib_index;
+
+      hash_set_mem (teib_db, te->te_key, tei);
+
+      TEIB_NOTIFY (te, nv_added);
+    }
+  else
+    return (VNET_API_ERROR_ENTRY_ALREADY_EXISTS);
+
+  return 0;
+}
+
+int
+teib_entry_del (u32 sw_if_index, const ip46_address_t * peer)
+{
+  teib_entry_t *te;
+
+  te = teib_entry_find (sw_if_index, peer);
+
+  if (te != NULL)
+    {
+      hash_unset_mem (teib_db, te->te_key);
+
+      TEIB_NOTIFY (te, nv_deleted);
+
+      clib_mem_free (te->te_key);
+      pool_put (teib_pool, te);
+    }
+  else
+    return (VNET_API_ERROR_ENTRY_ALREADY_EXISTS);
+
+  return 0;
+}
+
+u8 *
+format_teib_entry (u8 * s, va_list * args)
+{
+  index_t tei = va_arg (*args, index_t);
+  vnet_main_t *vnm = vnet_get_main ();
+  teib_entry_t *te;
+
+  te = teib_entry_get (tei);
+
+  s = format (s, "[%d] ", tei);
+  s = format (s, "%U:", format_vnet_sw_if_index_name,
+	      vnm, te->te_key->tk_sw_if_index);
+  s = format (s, " %U", format_ip46_address,
+	      &te->te_key->tk_peer, IP46_TYPE_ANY);
+  s = format (s, " via [%d]:%U",
+	      fib_table_get_table_id (te->te_fib_index, te->te_nh.fp_proto),
+	      format_fib_prefix, &te->te_nh);
+
+  return (s);
+}
+
+void
+teib_walk (teib_walk_cb_t fn, void *ctx)
+{
+  index_t tei;
+
+  /* *INDENT-OFF* */
+  pool_foreach_index(tei, teib_pool,
+  ({
+    fn(tei, ctx);
+  }));
+  /* *INDENT-ON* */
+}
+
+void
+teib_walk_itf (u32 sw_if_index, teib_walk_cb_t fn, void *ctx)
+{
+  index_t tei;
+
+  /* *INDENT-OFF* */
+  pool_foreach_index(tei, teib_pool,
+  ({
+    if (sw_if_index == teib_entry_get_sw_if_index(teib_entry_get(tei)))
+      fn(tei, ctx);
+  }));
+  /* *INDENT-ON* */
+}
+
+void
+teib_register (const teib_vft_t * vft)
+{
+  vec_add1 (teib_vfts, *vft);
+}
+
+static clib_error_t *
+teib_init (vlib_main_t * vm)
+{
+  teib_db = hash_create_mem (0, sizeof (teib_key_t), sizeof (u32));
+
+  return (NULL);
+}
+
+VLIB_INIT_FUNCTION (teib_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */