2 * Copyright (c) 2020 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #ifndef __CNAT_SNAT_H__
17 #define __CNAT_SNAT_H__
19 #include <cnat/cnat_types.h>
22 cnat_search_snat_prefix (ip46_address_t * addr, ip_address_family_t af)
24 /* Returns 0 if addr matches any of the listed prefixes */
25 cnat_snat_pfx_table_t *table = &cnat_main.snat_pfx_table;
26 clib_bihash_kv_24_8_t kv, val;
28 n_p = vec_len (table->meta[af].prefix_lengths_in_search_order);
31 kv.key[0] = addr->ip4.as_u32;
36 kv.key[0] = addr->as_u64[0];
37 kv.key[1] = addr->as_u64[1];
41 * start search from a mask length same length or shorter.
42 * we don't want matches longer than the mask passed
47 int dst_address_length =
48 table->meta[af].prefix_lengths_in_search_order[i];
49 ip6_address_t *mask = &table->ip_masks[dst_address_length];
51 ASSERT (dst_address_length >= 0 && dst_address_length <= 128);
52 /* As lengths are decreasing, masks are increasingly specific. */
53 kv.key[0] &= mask->as_u64[0];
54 kv.key[1] &= mask->as_u64[1];
55 kv.key[2] = ((u64) af << 32) | dst_address_length;
56 rv = clib_bihash_search_inline_2_24_8 (&table->ip_hash, &kv, &val);
63 extern int cnat_add_snat_prefix (ip_prefix_t * pfx);
64 extern int cnat_del_snat_prefix (ip_prefix_t * pfx);
67 * fd.io coding-style-patch-verification: ON
70 * eval: (c-set-style "gnu")