api: ip: add IP_ROUTE_LOOKUP API

[vpp.git] / src / vnet / ip / ip_api.c

diff --git a/src/vnet/ip/ip_api.c b/src/vnet/ip/ip_api.c
index d5fa2d3..b976eae 100644 (file)
--- a/src/vnet/ip/ip_api.c
+++ b/src/vnet/ip/ip_api.c
@@ -82,6 +82,7 @@ _(IP_TABLE_REPLACE_BEGIN, ip_table_replace_begin)                       \
 _(IP_TABLE_REPLACE_END, ip_table_replace_end)                           \
 _(IP_TABLE_FLUSH, ip_table_flush)                                       \
 _(IP_ROUTE_ADD_DEL, ip_route_add_del)                                   \
+_(IP_ROUTE_LOOKUP, ip_route_lookup)                                     \
 _(IP_TABLE_ADD_DEL, ip_table_add_del)                                   \
 _(IP_PUNT_POLICE, ip_punt_police)                                       \
 _(IP_PUNT_REDIRECT, ip_punt_redirect)                                   \
@@ -573,6 +574,62 @@ vl_api_ip_route_add_del_t_handler (vl_api_ip_route_add_del_t * mp)
   /* *INDENT-ON* */
 }
 
+void
+vl_api_ip_route_lookup_t_handler (vl_api_ip_route_lookup_t * mp)
+{
+  vl_api_ip_route_lookup_reply_t *rmp = NULL;
+  fib_route_path_t *rpaths = NULL, *rpath;
+  const fib_prefix_t *pfx = NULL;
+  fib_prefix_t lookup;
+  vl_api_fib_path_t *fp;
+  fib_node_index_t fib_entry_index;
+  u32 fib_index;
+  int npaths = 0;
+  int rv;
+
+  ip_prefix_decode (&mp->prefix, &lookup);
+  rv = fib_api_table_id_decode (lookup.fp_proto, ntohl (mp->table_id),
+                               &fib_index);
+  if (PREDICT_TRUE (!rv))
+    {
+      if (mp->exact)
+       fib_entry_index = fib_table_lookup_exact_match (fib_index, &lookup);
+      else
+       fib_entry_index = fib_table_lookup (fib_index, &lookup);
+      if (fib_entry_index == FIB_NODE_INDEX_INVALID)
+       rv = VNET_API_ERROR_NO_SUCH_ENTRY;
+      else
+       {
+         pfx = fib_entry_get_prefix (fib_entry_index);
+         rpaths = fib_entry_encode (fib_entry_index);
+         npaths = vec_len (rpaths);
+       }
+    }
+
+  /* *INDENT-OFF* */
+  REPLY_MACRO3_ZERO(VL_API_IP_ROUTE_LOOKUP_REPLY,
+                    npaths * sizeof (*fp),
+  ({
+    if (!rv)
+      {
+        ip_prefix_encode (pfx, &rmp->route.prefix);
+        rmp->route.table_id = mp->table_id;
+        rmp->route.n_paths = npaths;
+        rmp->route.stats_index = fib_table_entry_get_stats_index (fib_index, pfx);
+        rmp->route.stats_index = htonl (rmp->route.stats_index);
+
+        fp = rmp->route.paths;
+        vec_foreach (rpath, rpaths)
+          {
+            fib_api_path_encode (rpath, fp);
+            fp++;
+          }
+      }
+  }));
+  /* *INDENT-ON* */
+  vec_free (rpaths);
+}
+
 void
 ip_table_create (fib_protocol_t fproto,
                 u32 table_id, u8 is_api, const u8 * name)