when exceed max reass,

frag packet can't get reass.

adding bihash,it can rewrite new hash value.
so need to delete hash after compare hash value.

Change-Id: I83b5c47890110e9a598b78cfbe8fcd27bbe291bb
Signed-off-by: ahdj007 <dong.juan1@zte.com.cn>

diff --git a/src/plugins/nat/nat_reass.c b/src/plugins/nat/nat_reass.c
index 50bfced..eb1b492 100755 (executable)
--- a/src/plugins/nat/nat_reass.c
+++ b/src/plugins/nat/nat_reass.c
@@ -228,7 +228,7 @@ nat_ip4_reass_find_or_create (ip4_address_t src, ip4_address_t dst,
   dlist_elt_t *oldest_elt, *elt;
   dlist_elt_t *per_reass_list_head_elt;
   u32 oldest_index, elt_index;
-  clib_bihash_kv_16_8_t kv;
+  clib_bihash_kv_16_8_t kv, value;
 
   k.src.as_u32 = src.as_u32;
   k.dst.as_u32 = dst.as_u32;
@@ -273,12 +273,18 @@ nat_ip4_reass_find_or_create (ip4_address_t src, ip4_address_t dst,
       clib_dlist_addtail (srm->ip4_reass_lru_list_pool,
                          srm->ip4_reass_head_index, oldest_index);
 
-      kv.key[0] = k.as_u64[0];
-      kv.key[1] = k.as_u64[1];
-      if (clib_bihash_add_del_16_8 (&srm->ip4_reass_hash, &kv, 0))
+      kv.key[0] = reass->key.as_u64[0];
+      kv.key[1] = reass->key.as_u64[1];
+      if (!clib_bihash_search_16_8 (&srm->ip4_reass_hash, &kv, &value))
        {
-         reass = 0;
-         goto unlock;
+         if (value.value == (reass - srm->ip4_reass_pool))
+           {
+             if (clib_bihash_add_del_16_8 (&srm->ip4_reass_hash, &kv, 0))
+               {
+                 reass = 0;
+                 goto unlock;
+               }
+           }
        }
 
       nat_ip4_reass_get_frags_inline (reass, bi_to_drop);