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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 enum
43 {
46 
47 typedef struct
48 {
54 
55 typedef struct
56 {
67 
68 typedef struct
69 {
70  /** Interface pool */
72 
73  /** Address pool vector */
75 
76  /** sw_if_indices whose interface addresses should be auto-added */
78 
79  /** Pref64 vector */
81 
82  /** BIB and session DB per thread */
84 
85  /** Worker handoff */
88 
89  /** Pool of static BIB entries to be added/deleted in worker threads */
91 
93 
94  /** config parameters */
99 
100  /** values of various timeouts */
106 
107  /* Total count of interfaces enabled */
109  /* The process node which orcherstrates the cleanup */
111 
114 } nat64_main_t;
115 
116 extern nat64_main_t nat64_main;
119 
120 /**
121  * @brief Add/delete address to NAT64 pool.
122  *
123  * @param addr IPv4 address.
124  * @param vrf_id VRF id of tenant, ~0 means independent of VRF.
125  * @param is_add 1 if add, 0 if delete.
126  *
127  * @returns 0 on success, non-zero value otherwise.
128  */
129 int nat64_add_del_pool_addr (ip4_address_t * addr, u32 vrf_id, u8 is_add);
130 
131 /**
132  * @brief Call back function when walking addresses in NAT64 pool, non-zero
133  * return value stop walk.
134  */
136 
137 /**
138  * @brief Walk NAT64 pool.
139  *
140  * @param fn The function to invoke on each entry visited.
141  * @param ctx A context passed in the visit function.
142  */
144 
145 /**
146  * @brief NAT64 pool address from specific (DHCP addressed) interface.
147  *
148  * @param sw_if_index Index of the interface.
149  * @param is_add 1 if add, 0 if delete.
150  *
151  * @returns 0 on success, non-zero value otherwise.
152  */
153 int nat64_add_interface_address (u32 sw_if_index, int is_add);
154 
155 /**
156  * @brief Enable/disable NAT64 feature on the interface.
157  *
158  * @param sw_if_index Index of the interface.
159  * @param is_inside 1 if inside, 0 if outside.
160  * @param is_add 1 if add, 0 if delete.
161  *
162  * @returns 0 on success, non-zero value otherwise.
163  */
164 int nat64_add_del_interface (u32 sw_if_index, u8 is_inside, u8 is_add);
165 
166 /**
167  * @brief Call back function when walking interfaces with NAT64 feature,
168  * non-zero return value stop walk.
169  */
171 
172 /**
173  * @brief Walk NAT64 interfaces.
174  *
175  * @param fn The function to invoke on each entry visited.
176  * @param ctx A context passed in the visit function.
177  */
179 
180 /**
181  * @brief Initialize NAT64.
182  *
183  * @param vm vlib main.
184  *
185  * @return error code.
186  */
188 
189 /**
190  * @brief Add/delete static NAT64 BIB entry.
191  *
192  * @param in_addr Inside IPv6 address.
193  * @param out_addr Outside IPv4 address.
194  * @param in_port Inside port number.
195  * @param out_port Outside port number.
196  * @param proto L4 protocol.
197  * @param vrf_id VRF id of tenant.
198  * @param is_add 1 if add, 0 if delete.
199  *
200  * @returns 0 on success, non-zero value otherwise.
201  */
203  ip4_address_t * out_addr, u16 in_port,
204  u16 out_port, u8 proto, u32 vrf_id,
205  u8 is_add);
206 
207 /**
208  * @brief Alloce IPv4 address and port pair from NAT64 pool.
209  *
210  * @param fib_index FIB index of tenant.
211  * @param proto L4 protocol.
212  * @param addr Allocated IPv4 address.
213  * @param port Allocated port number.
214  * @param thread_index Thread index.
215  *
216  * @returns 0 on success, non-zero value otherwise.
217  */
219  ip4_address_t * addr, u16 * port,
220  u32 thread_index);
221 
222 /**
223  * @brief Set UDP session timeout.
224  *
225  * @param timeout Timeout value in seconds (if 0 reset to default value 300sec).
226  *
227  * @returns 0 on success, non-zero value otherwise.
228  */
229 int nat64_set_udp_timeout (u32 timeout);
230 
231 /**
232  * @brief Get UDP session timeout.
233  *
234  * @returns UDP session timeout in seconds.
235  */
237 
238 /**
239  * @brief Set ICMP session timeout.
240  *
241  * @param timeout Timeout value in seconds (if 0 reset to default value 60sec).
242  *
243  * @returns 0 on success, non-zero value otherwise.
244  */
245 int nat64_set_icmp_timeout (u32 timeout);
246 
247 /**
248  * @brief Get ICMP session timeout.
249  *
250  * @returns ICMP session timeout in seconds.
251  */
253 
254 /**
255  * @brief Set TCP session timeouts.
256  *
257  * @param trans Transitory timeout in seconds (if 0 reset to default value 240sec).
258  * @param est Established timeout in seconds (if 0 reset to default value 7440sec).
259  * @param incoming_syn Incoming SYN timeout in seconds (if 0 reset to default value 6sec).
260  *
261  * @returns 0 on success, non-zero value otherwise.
262  */
263 int nat64_set_tcp_timeouts (u32 trans, u32 est, u32 incoming_syn);
264 
265 /**
266  * @brief Get TCP transitory timeout.
267  *
268  * @returns TCP transitory timeout in seconds.
269  */
271 
272 /**
273  * @brief Get TCP established timeout.
274  *
275  * @returns TCP established timeout in seconds.
276  */
278 
279 /**
280  * @brief Get TCP incoming SYN timeout.
281  *
282  * @returns TCP incoming SYN timeout in seconds.
283  */
285 
286 /**
287  * @brief Reset NAT64 session timeout.
288  *
289  * @param ste Session table entry.
290  * @param vm VLIB main.
291  **/
292 void nat64_session_reset_timeout (nat64_db_st_entry_t * ste,
293  vlib_main_t * vm);
294 
295 /**
296  * @brief Set NAT64 TCP session state.
297  *
298  * @param ste Session table entry.
299  * @param tcp TCP header.
300  * @param is_ip6 1 if IPv6 packet, 0 if IPv4.
301  */
302 void nat64_tcp_session_set_state (nat64_db_st_entry_t * ste,
303  tcp_header_t * tcp, u8 is_ip6);
304 
305 /**
306  * @brief Add/delete NAT64 prefix.
307  *
308  * @param prefix NAT64 prefix.
309  * @param plen Prefix length.
310  * @param vrf_id VRF id of tenant.
311  * @param is_add 1 if add, 0 if delete.
312  *
313  * @returns 0 on success, non-zero value otherwise.
314  */
315 int nat64_add_del_prefix (ip6_address_t * prefix, u8 plen, u32 vrf_id,
316  u8 is_add);
317 
318 /**
319  * @brief Call back function when walking addresses in NAT64 prefixes, non-zero
320  * return value stop walk.
321  */
322 typedef int (*nat64_prefix_walk_fn_t) (nat64_prefix_t * pref64, void *ctx);
323 
324 /**
325  * @brief Walk NAT64 prefixes.
326  *
327  * @param fn The function to invoke on each entry visited.
328  * @param ctx A context passed in the visit function.
329  */
331 
332 /**
333  * Compose IPv4-embedded IPv6 addresses.
334  * @param ip6 IPv4-embedded IPv6 addresses.
335  * @param ip4 IPv4 address.
336  * @param fib_index Tenant FIB index.
337  */
339  u32 fib_index);
340 
341 /**
342  * Extract IPv4 address from the IPv4-embedded IPv6 addresses.
343  *
344  * @param ip6 IPv4-embedded IPv6 addresses.
345  * @param ip4 IPv4 address.
346  * @param fib_index Tenant FIB index.
347  */
349  u32 fib_index);
350 
351 /**
352  * @brief Set NAT64 hash tables configuration.
353  *
354  * @param bib_buckets Number of BIB hash buckets.
355  * @param bib_memory_size Memory size of BIB hash.
356  * @param st_buckets Number of session table hash buckets.
357  * @param st_memory_size Memory size of session table hash.
358  */
359 void nat64_set_hash (u32 bib_buckets, u32 bib_memory_size, u32 st_buckets,
360  u32 st_memory_size);
361 
362 /**
363  * @brief Get worker thread index for NAT64 in2out.
364  *
365  * @param addr IPv6 src address.
366  *
367  * @returns worker thread index.
368  */
370 
371 /**
372  * @brief Get worker thread index for NAT64 out2in.
373  *
374  * @param ip IPv4 header.
375  *
376  * @returns worker thread index.
377  */
379 
380 #define u8_ptr_add(ptr, index) (((u8 *)ptr) + index)
381 #define u16_net_add(u, val) clib_host_to_net_u16(clib_net_to_host_u16(u) + (val))
382 
383 #endif /* __included_nat64_h__ */
384 
385 /*
386  * fd.io coding-style-patch-verification: ON
387  *
388  * Local Variables:
389  * eval: (c-set-style "gnu")
390  * End:
391  */
nat64_db_t * db
BIB and session DB per thread.
Definition: nat64.h:83
u32 icmp_timeout
Definition: nat64.h:102
sll srl srl sll sra u16x4 i
Definition: vector_sse2.h:337
nat64_main_t nat64_main
Definition: nat64.c:27
ip6_address_t prefix
Definition: nat64.h:49
snat_address_t * addr_pool
Address pool vector.
Definition: nat64.h:74
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:273
enum @387 nat64_cleaner_process_event_e
u32 st_buckets
Definition: nat64.h:97
u32 nat64_expire_walk_node_index
Definition: nat64.h:110
void nat64_set_hash(u32 bib_buckets, u32 bib_memory_size, u32 st_buckets, u32 st_memory_size)
Set NAT64 hash tables configuration.
Definition: nat64.c:251
int nat64_add_interface_address(u32 sw_if_index, int is_add)
NAT64 pool address from specific (DHCP addressed) interface.
Definition: nat64.c:362
u32 bib_memory_size
Definition: nat64.h:96
struct _vlib_node_registration vlib_node_registration_t
u32 nat64_get_worker_out2in(ip4_header_t *ip)
Get worker thread index for NAT64 out2in.
Definition: nat64.c:120
u32 tcp_trans_timeout
Definition: nat64.h:103
struct _tcp_header tcp_header_t
u32 * auto_add_sw_if_indices
sw_if_indices whose interface addresses should be auto-added
Definition: nat64.h:77
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:403
#define foreach_nat64_tcp_ses_state
Definition: nat64.h:25
u32 total_enabled_count
Definition: nat64.h:108
u32 tcp_est_timeout
Definition: nat64.h:104
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:624
snat_main_t * sm
Definition: nat64.h:113
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:797
snat_interface_t * interfaces
Interface pool.
Definition: nat64.h:71
u32 tcp_incoming_syn_timeout
Definition: nat64.h:105
u32 fib_index
Definition: nat64.h:52
u32 udp_timeout
values of various timeouts
Definition: nat64.h:101
u32 nat64_get_icmp_timeout(void)
Get ICMP session timeout.
Definition: nat64.c:789
ip4_address_t out_addr
Definition: nat64.h:59
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:883
nat64_prefix_t * pref64
Pref64 vector.
Definition: nat64.h:80
ip6_address_t in_addr
Definition: nat64.h:57
u32 nat64_get_worker_in2out(ip6_address_t *addr)
Get worker thread index for NAT64 in2out.
Definition: nat64.c:97
u32 st_memory_size
Definition: nat64.h:98
int nat64_add_del_prefix(ip6_address_t *prefix, u8 plen, u32 vrf_id, u8 is_add)
Add/delete NAT64 prefix.
Definition: nat64.c:950
int nat64_set_udp_timeout(u32 timeout)
Set UDP session timeout.
Definition: nat64.c:753
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:347
vlib_node_registration_t nat64_out2in_node
(constructor) VLIB_REGISTER_NODE (nat64_out2in_node)
Definition: nat64_out2in.c:524
u32 nat64_get_tcp_trans_timeout(void)
Get TCP transitory timeout.
Definition: nat64.c:820
vlib_main_t * vm
Definition: buffer.c:283
int nat64_alloc_out_addr_and_port(u32 fib_index, snat_protocol_t proto, ip4_address_t *addr, u16 *port, u32 thread_index)
Alloce IPv4 address and port pair from NAT64 pool.
Definition: nat64.c:502
u32 nat64_get_udp_timeout(void)
Get UDP session timeout.
Definition: nat64.c:768
u32 nat64_get_tcp_est_timeout(void)
Get TCP established timeout.
Definition: nat64.c:828
u32 bib_buckets
config parameters
Definition: nat64.h:95
void nat64_interfaces_walk(nat64_interface_walk_fn_t fn, void *ctx)
Walk NAT64 interfaces.
Definition: nat64.c:487
clib_error_t * nat64_init(vlib_main_t *vm)
Initialize NAT64.
Definition: nat64.c:211
u32 fq_out2in_index
Definition: nat64.h:87
u32 vrf_id
Definition: nat64.h:51
unsigned int u32
Definition: types.h:88
u32 fq_in2out_index
Worker handoff.
Definition: nat64.h:86
long ctx[MAX_CONNS]
Definition: main.c:122
nat64_static_bib_to_update_t * static_bibs
Pool of static BIB entries to be added/deleted in worker threads.
Definition: nat64.h:90
IPv4 main type.
Definition: ip4.h:95
int nat64_set_icmp_timeout(u32 timeout)
Set ICMP session timeout.
Definition: nat64.c:776
ip4_main_t * ip4_main
Definition: nat64.h:112
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:836
snat_protocol_t
Definition: nat.h:104
u32 error_node_index
Definition: nat64.h:92
void nat64_session_reset_timeout(nat64_db_st_entry_t *ste, vlib_main_t *vm)
Reset NAT64 session timeout.
Definition: nat64.c:844
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:1083
void nat64_prefix_walk(nat64_prefix_walk_fn_t fn, void *ctx)
Walk NAT64 prefixes.
Definition: nat64.c:998
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:1013
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:322
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:170
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:135