IPv6 Performance bugs

[vpp.git] / src / vnet / fib / ip6_fib.h

diff --git a/src/vnet/fib/ip6_fib.h b/src/vnet/fib/ip6_fib.h
index 2bf8ef7..9789da4 100644 (file)
--- a/src/vnet/fib/ip6_fib.h
+++ b/src/vnet/fib/ip6_fib.h
@@ -53,9 +53,6 @@ extern void ip6_fib_table_fwding_dpo_remove(u32 fib_index,
 u32 ip6_fib_table_fwding_lookup_with_if_index(ip6_main_t * im,
                                              u32 sw_if_index,
                                              const ip6_address_t * dst);
-u32 ip6_fib_table_fwding_lookup(ip6_main_t * im,
-                               u32 fib_index,
-                               const ip6_address_t * dst);
 
 /**
  * @brief Walk all entries in a FIB table
@@ -66,6 +63,45 @@ extern void ip6_fib_table_walk(u32 fib_index,
                                fib_table_walk_fn_t fn,
                                void *ctx);
 
+always_inline u32
+ip6_fib_table_fwding_lookup (ip6_main_t * im,
+                             u32 fib_index,
+                             const ip6_address_t * dst)
+{
+    const ip6_fib_table_instance_t *table;
+    int i, len;
+    int rv;
+    BVT(clib_bihash_kv) kv, value;
+    u64 fib;
+
+    table = &ip6_main.ip6_table[IP6_FIB_TABLE_FWDING];
+    len = vec_len (table->prefix_lengths_in_search_order);
+
+    kv.key[0] = dst->as_u64[0];
+    kv.key[1] = dst->as_u64[1];
+    fib = ((u64)((fib_index))<<32);
+
+    for (i = 0; i < len; i++)
+    {
+       int dst_address_length = table->prefix_lengths_in_search_order[i];
+       ip6_address_t * mask = &ip6_main.fib_masks[dst_address_length];
+
+       ASSERT(dst_address_length >= 0 && dst_address_length <= 128);
+       //As lengths are decreasing, masks are increasingly specific.
+       kv.key[0] &= mask->as_u64[0];
+       kv.key[1] &= mask->as_u64[1];
+       kv.key[2] = fib | dst_address_length;
+
+       rv = BV(clib_bihash_search_inline_2)(&table->ip6_hash, &kv, &value);
+       if (rv == 0)
+           return value.value;
+    }
+
+    /* default route is always present */
+    ASSERT(0);
+    return 0;
+}
+
 /**
  * @brief return the DPO that the LB stacks on.
  */