2 * Copyright (c) 2018 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.
17 * @brief NAT66 implementation
20 #include <nat/nat66.h>
21 #include <vnet/fib/fib_table.h>
23 nat66_main_t nat66_main;
27 /* Hook up input features */
28 VNET_FEATURE_INIT (nat66_in2out, static) = {
29 .arc_name = "ip6-unicast",
30 .node_name = "nat66-in2out",
31 .runs_before = VNET_FEATURES ("ip6-lookup"),
33 VNET_FEATURE_INIT (nat66_out2in, static) = {
34 .arc_name = "ip6-unicast",
35 .node_name = "nat66-out2in",
36 .runs_before = VNET_FEATURES ("ip6-lookup"),
43 nat66_init (vlib_main_t * vm)
45 nat66_main_t *nm = &nat66_main;
47 u32 static_mapping_buckets = 1024;
48 uword static_mapping_memory_size = 64 << 20;
50 node = vlib_get_node_by_name (vm, (u8 *) "nat66-in2out");
51 nm->in2out_node_index = node->index;
53 node = vlib_get_node_by_name (vm, (u8 *) "nat66-out2in");
54 nm->out2in_node_index = node->index;
56 clib_bihash_init_24_8 (&nm->sm_l, "nat66-static-map-by-local",
57 static_mapping_buckets, static_mapping_memory_size);
58 clib_bihash_init_24_8 (&nm->sm_e, "nat66-static-map-by-external",
59 static_mapping_buckets, static_mapping_memory_size);
61 nm->session_counters.name = "session counters";
65 nat66_interface_add_del (u32 sw_if_index, u8 is_inside, u8 is_add)
67 nat66_main_t *nm = &nat66_main;
68 snat_interface_t *interface = 0, *i;
69 const char *feature_name;
72 pool_foreach (i, nm->interfaces,
74 if (i->sw_if_index == sw_if_index)
85 return VNET_API_ERROR_VALUE_EXIST;
87 pool_get (nm->interfaces, interface);
88 interface->sw_if_index = sw_if_index;
90 is_inside ? NAT_INTERFACE_FLAG_IS_INSIDE :
91 NAT_INTERFACE_FLAG_IS_OUTSIDE;
96 return VNET_API_ERROR_NO_SUCH_ENTRY;
98 pool_put (nm->interfaces, interface);
101 feature_name = is_inside ? "nat66-in2out" : "nat66-out2in";
102 return vnet_feature_enable_disable ("ip6-unicast", feature_name,
103 sw_if_index, is_add, 0, 0);
107 nat66_interfaces_walk (nat66_interface_walk_fn_t fn, void *ctx)
109 nat66_main_t *nm = &nat66_main;
110 snat_interface_t *i = 0;
113 pool_foreach (i, nm->interfaces,
121 nat66_static_mapping_t *
122 nat66_static_mapping_get (ip6_address_t * addr, u32 fib_index, u8 is_local)
124 nat66_main_t *nm = &nat66_main;
125 nat66_static_mapping_t *sm = 0;
126 nat66_sm_key_t sm_key;
127 clib_bihash_kv_24_8_t kv, value;
129 sm_key.addr.as_u64[0] = addr->as_u64[0];
130 sm_key.addr.as_u64[1] = addr->as_u64[1];
131 sm_key.fib_index = fib_index;
134 kv.key[0] = sm_key.as_u64[0];
135 kv.key[1] = sm_key.as_u64[1];
136 kv.key[2] = sm_key.as_u64[2];
138 if (!clib_bihash_search_24_8
139 (is_local ? &nm->sm_l : &nm->sm_e, &kv, &value))
140 sm = pool_elt_at_index (nm->sm, value.value);
146 nat66_static_mapping_add_del (ip6_address_t * l_addr, ip6_address_t * e_addr,
147 u32 vrf_id, u8 is_add)
149 nat66_main_t *nm = &nat66_main;
151 nat66_static_mapping_t *sm = 0;
152 nat66_sm_key_t sm_key;
153 clib_bihash_kv_24_8_t kv, value;
154 u32 fib_index = fib_table_find (FIB_PROTOCOL_IP6, vrf_id);
156 sm_key.addr.as_u64[0] = l_addr->as_u64[0];
157 sm_key.addr.as_u64[1] = l_addr->as_u64[1];
158 sm_key.fib_index = fib_index;
160 kv.key[0] = sm_key.as_u64[0];
161 kv.key[1] = sm_key.as_u64[1];
162 kv.key[2] = sm_key.as_u64[2];
164 if (!clib_bihash_search_24_8 (&nm->sm_l, &kv, &value))
165 sm = pool_elt_at_index (nm->sm, value.value);
170 return VNET_API_ERROR_VALUE_EXIST;
172 fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, vrf_id,
173 FIB_SOURCE_PLUGIN_HI);
174 pool_get (nm->sm, sm);
175 clib_memset (sm, 0, sizeof (*sm));
176 sm->l_addr.as_u64[0] = l_addr->as_u64[0];
177 sm->l_addr.as_u64[1] = l_addr->as_u64[1];
178 sm->e_addr.as_u64[0] = e_addr->as_u64[0];
179 sm->e_addr.as_u64[1] = e_addr->as_u64[1];
180 sm->fib_index = fib_index;
182 sm_key.fib_index = fib_index;
183 kv.key[0] = sm_key.as_u64[0];
184 kv.key[1] = sm_key.as_u64[1];
185 kv.key[2] = sm_key.as_u64[2];
186 kv.value = sm - nm->sm;
187 if (clib_bihash_add_del_24_8 (&nm->sm_l, &kv, 1))
188 nat_elog_warn ("nat66-static-map-by-local add key failed");
189 sm_key.addr.as_u64[0] = e_addr->as_u64[0];
190 sm_key.addr.as_u64[1] = e_addr->as_u64[1];
191 sm_key.fib_index = 0;
192 kv.key[0] = sm_key.as_u64[0];
193 kv.key[1] = sm_key.as_u64[1];
194 kv.key[2] = sm_key.as_u64[2];
195 if (clib_bihash_add_del_24_8 (&nm->sm_e, &kv, 1))
196 nat_elog_warn ("nat66-static-map-by-external add key failed");
198 vlib_validate_combined_counter (&nm->session_counters, kv.value);
199 vlib_zero_combined_counter (&nm->session_counters, kv.value);
204 return VNET_API_ERROR_NO_SUCH_ENTRY;
206 kv.value = sm - nm->sm;
207 if (clib_bihash_add_del_24_8 (&nm->sm_l, &kv, 0))
208 nat_elog_warn ("nat66-static-map-by-local delete key failed");
209 sm_key.addr.as_u64[0] = e_addr->as_u64[0];
210 sm_key.addr.as_u64[1] = e_addr->as_u64[1];
211 sm_key.fib_index = 0;
212 kv.key[0] = sm_key.as_u64[0];
213 kv.key[1] = sm_key.as_u64[1];
214 kv.key[2] = sm_key.as_u64[2];
215 if (clib_bihash_add_del_24_8 (&nm->sm_e, &kv, 0))
216 nat_elog_warn ("nat66-static-map-by-external delete key failed");
217 fib_table_unlock (sm->fib_index, FIB_PROTOCOL_IP6,
218 FIB_SOURCE_PLUGIN_HI);
219 pool_put (nm->sm, sm);
226 nat66_static_mappings_walk (nat66_static_mapping_walk_fn_t fn, void *ctx)
228 nat66_main_t *nm = &nat66_main;
229 nat66_static_mapping_t *sm = 0;
232 pool_foreach (sm, nm->sm,
241 * fd.io coding-style-patch-verification: ON
244 * eval: (c-set-style "gnu")