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Vector Packet Processing
nat64.h
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1 /*
2  * Copyright (c) 2017 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:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
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.
14  */
15 /**
16  * @file
17  * @brief NAT64 global declarations
18  */
19 #ifndef __included_nat64_h__
20 #define __included_nat64_h__
21 
22 #include <nat/nat.h>
23 #include <nat/nat64_db.h>
24 
25 #define foreach_nat64_tcp_ses_state \
26  _(0, CLOSED, "closed") \
27  _(1, V4_INIT, "v4-init") \
28  _(2, V6_INIT, "v6-init") \
29  _(3, ESTABLISHED, "established") \
30  _(4, V4_FIN_RCV, "v4-fin-rcv") \
31  _(5, V6_FIN_RCV, "v6-fin-rcv") \
32  _(6, V6_FIN_V4_FIN_RCV, "v6-fin-v4-fin-rcv") \
33  _(7, TRANS, "trans")
34 
35 typedef enum
36 {
37 #define _(v, N, s) NAT64_TCP_STATE_##N = v,
39 #undef _
41 
42 typedef struct
43 {
49 
50 typedef struct
51 {
52  /** Interface pool */
54 
55  /** Address pool vector */
57 
58  /** Pref64 vector */
60 
61  /** BIB and session DB */
63 
64  /* values of various timeouts */
70 
72 
74 } nat64_main_t;
75 
79 
80 /**
81  * @brief Add/delete address to NAT64 pool.
82  *
83  * @param addr IPv4 address.
84  * @param vrf_id VRF id of tenant, ~0 means independent of VRF.
85  * @param is_add 1 if add, 0 if delete.
86  *
87  * @returns 0 on success, non-zero value otherwise.
88  */
89 int nat64_add_del_pool_addr (ip4_address_t * addr, u32 vrf_id, u8 is_add);
90 
91 /**
92  * @brief Call back function when walking addresses in NAT64 pool, non-zero
93  * return value stop walk.
94  */
96 
97 /**
98  * @brief Walk NAT64 pool.
99  *
100  * @param fn The function to invoke on each entry visited.
101  * @param ctx A context passed in the visit function.
102  */
104 
105 /**
106  * @brief Enable/disable NAT64 feature on the interface.
107  *
108  * @param sw_if_index Index of the interface.
109  * @param is_inside 1 if inside, 0 if outside.
110  * @param is_add 1 if add, 0 if delete.
111  *
112  * @returns 0 on success, non-zero value otherwise.
113  */
114 int nat64_add_del_interface (u32 sw_if_index, u8 is_inside, u8 is_add);
115 
116 /**
117  * @brief Call back function when walking interfaces with NAT64 feature,
118  * non-zero return value stop walk.
119  */
121 
122 /**
123  * @brief Walk NAT64 interfaces.
124  *
125  * @param fn The function to invoke on each entry visited.
126  * @param ctx A context passed in the visit function.
127  */
129 
130 /**
131  * @brief Initialize NAT64.
132  *
133  * @param vm vlib main.
134  *
135  * @return error code.
136  */
138 
139 /**
140  * @brief Add/delete static NAT64 BIB entry.
141  *
142  * @param in_addr Inside IPv6 address.
143  * @param out_addr Outside IPv4 address.
144  * @param in_port Inside port number.
145  * @param out_port Outside port number.
146  * @param proto L4 protocol.
147  * @param vrf_id VRF id of tenant.
148  * @param is_add 1 if add, 0 if delete.
149  *
150  * @returns 0 on success, non-zero value otherwise.
151  */
153  ip4_address_t * out_addr, u16 in_port,
154  u16 out_port, u8 proto, u32 vrf_id,
155  u8 is_add);
156 
157 /**
158  * @brief Alloce IPv4 address and port pair from NAT64 pool.
159  *
160  * @param fib_index FIB index of tenant.
161  * @param proto L4 protocol.
162  * @param addr Allocated IPv4 address.
163  * @param port Allocated port number.
164  *
165  * @returns 0 on success, non-zero value otherwise.
166  */
168  ip4_address_t * addr, u16 * port);
169 
170 /**
171  * @brief Free IPv4 address and port pair from NAT64 pool.
172  *
173  * @param addr IPv4 address to free.
174  * @param port Port number to free.
175  * @param proto L4 protocol.
176  *
177  * @returns 0 on success, non-zero value otherwise.
178  */
180  snat_protocol_t proto);
181 
182 /**
183  * @brief Set UDP session timeout.
184  *
185  * @param timeout Timeout value in seconds (if 0 reset to default value 300sec).
186  *
187  * @returns 0 on success, non-zero value otherwise.
188  */
189 int nat64_set_udp_timeout (u32 timeout);
190 
191 /**
192  * @brief Get UDP session timeout.
193  *
194  * @returns UDP session timeout in seconds.
195  */
197 
198 /**
199  * @brief Set ICMP session timeout.
200  *
201  * @param timeout Timeout value in seconds (if 0 reset to default value 60sec).
202  *
203  * @returns 0 on success, non-zero value otherwise.
204  */
205 int nat64_set_icmp_timeout (u32 timeout);
206 
207 /**
208  * @brief Get ICMP session timeout.
209  *
210  * @returns ICMP session timeout in seconds.
211  */
213 
214 /**
215  * @brief Set TCP session timeouts.
216  *
217  * @param trans Transitory timeout in seconds (if 0 reset to default value 240sec).
218  * @param est Established timeout in seconds (if 0 reset to default value 7440sec).
219  * @param incoming_syn Incoming SYN timeout in seconds (if 0 reset to default value 6sec).
220  *
221  * @returns 0 on success, non-zero value otherwise.
222  */
223 int nat64_set_tcp_timeouts (u32 trans, u32 est, u32 incoming_syn);
224 
225 /**
226  * @brief Get TCP transitory timeout.
227  *
228  * @returns TCP transitory timeout in seconds.
229  */
231 
232 /**
233  * @brief Get TCP established timeout.
234  *
235  * @returns TCP established timeout in seconds.
236  */
238 
239 /**
240  * @brief Get TCP incoming SYN timeout.
241  *
242  * @returns TCP incoming SYN timeout in seconds.
243  */
245 
246 /**
247  * @brief Reset NAT64 session timeout.
248  *
249  * @param ste Session table entry.
250  * @param vm VLIB main.
251  **/
252 void nat64_session_reset_timeout (nat64_db_st_entry_t * ste,
253  vlib_main_t * vm);
254 
255 /**
256  * @brief Set NAT64 TCP session state.
257  *
258  * @param ste Session table entry.
259  * @param tcp TCP header.
260  * @param is_ip6 1 if IPv6 packet, 0 if IPv4.
261  */
262 void nat64_tcp_session_set_state (nat64_db_st_entry_t * ste,
263  tcp_header_t * tcp, u8 is_ip6);
264 
265 /**
266  * @brief Add/delete NAT64 prefix.
267  *
268  * @param prefix NAT64 prefix.
269  * @param plen Prefix length.
270  * @param vrf_id VRF id of tenant.
271  * @param is_add 1 if add, 0 if delete.
272  *
273  * @returns 0 on success, non-zero value otherwise.
274  */
275 int nat64_add_del_prefix (ip6_address_t * prefix, u8 plen, u32 vrf_id,
276  u8 is_add);
277 
278 /**
279  * @brief Call back function when walking addresses in NAT64 prefixes, non-zero
280  * return value stop walk.
281  */
282 typedef int (*nat64_prefix_walk_fn_t) (nat64_prefix_t * pref64, void *ctx);
283 
284 /**
285  * @brief Walk NAT64 prefixes.
286  *
287  * @param fn The function to invoke on each entry visited.
288  * @param ctx A context passed in the visit function.
289  */
291 
292 /**
293  * Compose IPv4-embedded IPv6 addresses.
294  * @param ip6 IPv4-embedded IPv6 addresses.
295  * @param ip4 IPv4 address.
296  * @param fib_index Tenant FIB index.
297  */
299  u32 fib_index);
300 
301 /**
302  * Extract IPv4 address from the IPv4-embedded IPv6 addresses.
303  *
304  * @param ip6 IPv4-embedded IPv6 addresses.
305  * @param ip4 IPv4 address.
306  * @param fib_index Tenant FIB index.
307  */
309  u32 fib_index);
310 
311 #define u8_ptr_add(ptr, index) (((u8 *)ptr) + index)
312 #define u16_net_add(u, val) clib_host_to_net_u16(clib_net_to_host_u16(u) + (val))
313 
314 #endif /* __included_nat64_h__ */
315 
316 /*
317  * fd.io coding-style-patch-verification: ON
318  *
319  * Local Variables:
320  * eval: (c-set-style "gnu")
321  * End:
322  */
u32 icmp_timeout
Definition: nat64.h:66
sll srl srl sll sra u16x4 i
Definition: vector_sse2.h:337
nat64_main_t nat64_main
Definition: nat64.c:25
ip6_address_t prefix
Definition: nat64.h:44
snat_address_t * addr_pool
Address pool vector.
Definition: nat64.h:56
int nat64_add_del_pool_addr(ip4_address_t *addr, u32 vrf_id, u8 is_add)
Add/delete address to NAT64 pool.
Definition: nat64.c:83
u8 is_disabled
Definition: nat64.h:71
struct _vlib_node_registration vlib_node_registration_t
u32 tcp_trans_timeout
Definition: nat64.h:67
struct _tcp_header tcp_header_t
int nat64_add_del_interface(u32 sw_if_index, u8 is_inside, u8 is_add)
Enable/disable NAT64 feature on the interface.
Definition: nat64.c:166
#define foreach_nat64_tcp_ses_state
Definition: nat64.h:25
int nat64_alloc_out_addr_and_port(u32 fib_index, snat_protocol_t proto, ip4_address_t *addr, u16 *port)
Alloce IPv4 address and port pair from NAT64 pool.
Definition: nat64.c:234
u32 tcp_est_timeout
Definition: nat64.h:68
int nat64_add_del_static_bib_entry(ip6_address_t *in_addr, ip4_address_t *out_addr, u16 in_port, u16 out_port, u8 proto, u32 vrf_id, u8 is_add)
Add/delete static NAT64 BIB entry.
Definition: nat64.c:352
snat_main_t * sm
Definition: nat64.h:73
vlib_node_registration_t nat64_in2out_node
(constructor) VLIB_REGISTER_NODE (nat64_in2out_node)
int nat64_set_tcp_timeouts(u32 trans, u32 est, u32 incoming_syn)
Set TCP session timeouts.
Definition: nat64.c:469
snat_interface_t * interfaces
Interface pool.
Definition: nat64.h:53
u32 tcp_incoming_syn_timeout
Definition: nat64.h:69
nat64_db_t db
BIB and session DB.
Definition: nat64.h:62
u32 fib_index
Definition: nat64.h:47
u32 udp_timeout
Definition: nat64.h:65
u32 nat64_get_icmp_timeout(void)
Get ICMP session timeout.
Definition: nat64.c:461
void nat64_tcp_session_set_state(nat64_db_st_entry_t *ste, tcp_header_t *tcp, u8 is_ip6)
Set NAT64 TCP session state.
Definition: nat64.c:555
nat64_prefix_t * pref64
Pref64 vector.
Definition: nat64.h:59
int nat64_add_del_prefix(ip6_address_t *prefix, u8 plen, u32 vrf_id, u8 is_add)
Add/delete NAT64 prefix.
Definition: nat64.c:622
int nat64_set_udp_timeout(u32 timeout)
Set UDP session timeout.
Definition: nat64.c:425
nat64_tcp_ses_state_t
Definition: nat64.h:35
void nat64_pool_addr_walk(nat64_pool_addr_walk_fn_t fn, void *ctx)
Walk NAT64 pool.
Definition: nat64.c:151
void nat64_free_out_addr_and_port(ip4_address_t *addr, u16 port, snat_protocol_t proto)
Free IPv4 address and port pair from NAT64 pool.
Definition: nat64.c:320
vlib_node_registration_t nat64_out2in_node
(constructor) VLIB_REGISTER_NODE (nat64_out2in_node)
Definition: nat64_out2in.c:470
u32 nat64_get_tcp_trans_timeout(void)
Get TCP transitory timeout.
Definition: nat64.c:492
vlib_main_t * vm
Definition: buffer.c:283
u32 nat64_get_udp_timeout(void)
Get UDP session timeout.
Definition: nat64.c:440
u32 nat64_get_tcp_est_timeout(void)
Get TCP established timeout.
Definition: nat64.c:500
void nat64_interfaces_walk(nat64_interface_walk_fn_t fn, void *ctx)
Walk NAT64 interfaces.
Definition: nat64.c:219
clib_error_t * nat64_init(vlib_main_t *vm)
Initialize NAT64.
Definition: nat64.c:51
u32 vrf_id
Definition: nat64.h:46
unsigned int u32
Definition: types.h:88
long ctx[MAX_CONNS]
Definition: main.c:95
int nat64_set_icmp_timeout(u32 timeout)
Set ICMP session timeout.
Definition: nat64.c:448
unsigned short u16
Definition: types.h:57
unsigned char u8
Definition: types.h:56
u32 nat64_get_tcp_incoming_syn_timeout(void)
Get TCP incoming SYN timeout.
Definition: nat64.c:508
snat_protocol_t
Definition: nat.h:104
void nat64_session_reset_timeout(nat64_db_st_entry_t *ste, vlib_main_t *vm)
Reset NAT64 session timeout.
Definition: nat64.c:516
NAT64 DB.
void nat64_extract_ip4(ip6_address_t *ip6, ip4_address_t *ip4, u32 fib_index)
Extract IPv4 address from the IPv4-embedded IPv6 addresses.
Definition: nat64.c:756
void nat64_prefix_walk(nat64_prefix_walk_fn_t fn, void *ctx)
Walk NAT64 prefixes.
Definition: nat64.c:670
vhost_vring_addr_t addr
Definition: vhost-user.h:83
void nat64_compose_ip6(ip6_address_t *ip6, ip4_address_t *ip4, u32 fib_index)
Compose IPv4-embedded IPv6 addresses.
Definition: nat64.c:685
int(* nat64_prefix_walk_fn_t)(nat64_prefix_t *pref64, void *ctx)
Call back function when walking addresses in NAT64 prefixes, non-zero return value stop walk...
Definition: nat64.h:282
int(* nat64_interface_walk_fn_t)(snat_interface_t *i, void *ctx)
Call back function when walking interfaces with NAT64 feature, non-zero return value stop walk...
Definition: nat64.h:120
int(* nat64_pool_addr_walk_fn_t)(snat_address_t *addr, void *ctx)
Call back function when walking addresses in NAT64 pool, non-zero return value stop walk...
Definition: nat64.h:95