1 /** @file
2 @brief IPv6 data handler
3
4 This is not to be included by the application.
5 */
6
7 /*
8 * Copyright (c) 2016 Intel Corporation
9 *
10 * SPDX-License-Identifier: Apache-2.0
11 */
12
13 #ifndef __IPV6_H
14 #define __IPV6_H
15
16 #include <zephyr/types.h>
17
18 #include <zephyr/net/net_ip.h>
19 #include <zephyr/net/net_pkt.h>
20 #include <zephyr/net/net_if.h>
21 #include <zephyr/net/net_context.h>
22
23 #include "icmpv6.h"
24 #include "nbr.h"
25
26 #define NET_IPV6_ND_HOP_LIMIT 255
27 #define NET_IPV6_ND_INFINITE_LIFETIME 0xFFFFFFFF
28
29 #define NET_IPV6_DEFAULT_PREFIX_LEN 64
30
31 #define NET_MAX_RS_COUNT 3
32
33 #define NET_IPV6_DSCP_MASK 0xFC
34 #define NET_IPV6_DSCP_OFFSET 2
35 #define NET_IPV6_ECN_MASK 0x03
36
37 /**
38 * @brief Bitmaps for IPv6 extension header processing
39 *
40 * When processing extension headers, we record which one we have seen.
41 * This is done as the network packet cannot have twice the same header,
42 * except for destination option.
43 * This information is stored in bitfield variable.
44 * The order of the bitmap is the order recommended in RFC 2460.
45 */
46 #define NET_IPV6_EXT_HDR_BITMAP_HBHO 0x01
47 #define NET_IPV6_EXT_HDR_BITMAP_DESTO1 0x02
48 #define NET_IPV6_EXT_HDR_BITMAP_ROUTING 0x04
49 #define NET_IPV6_EXT_HDR_BITMAP_FRAG 0x08
50 #define NET_IPV6_EXT_HDR_BITMAP_AH 0x10
51 #define NET_IPV6_EXT_HDR_BITMAP_ESP 0x20
52 #define NET_IPV6_EXT_HDR_BITMAP_DESTO2 0x40
53
54 /**
55 * @brief Destination and Hop By Hop extension headers option types
56 */
57 #define NET_IPV6_EXT_HDR_OPT_PAD1 0
58 #define NET_IPV6_EXT_HDR_OPT_PADN 1
59 #define NET_IPV6_EXT_HDR_OPT_RPL 0x63
60
61 /**
62 * @brief Multicast Listener Record v2 record types.
63 */
64 #define NET_IPV6_MLDv2_MODE_IS_INCLUDE 1
65 #define NET_IPV6_MLDv2_MODE_IS_EXCLUDE 2
66 #define NET_IPV6_MLDv2_CHANGE_TO_INCLUDE_MODE 3
67 #define NET_IPV6_MLDv2_CHANGE_TO_EXCLUDE_MODE 4
68 #define NET_IPV6_MLDv2_ALLOW_NEW_SOURCES 5
69 #define NET_IPV6_MLDv2_BLOCK_OLD_SOURCES 6
70
71 /* State of the neighbor */
72 enum net_ipv6_nbr_state {
73 NET_IPV6_NBR_STATE_INCOMPLETE,
74 NET_IPV6_NBR_STATE_REACHABLE,
75 NET_IPV6_NBR_STATE_STALE,
76 NET_IPV6_NBR_STATE_DELAY,
77 NET_IPV6_NBR_STATE_PROBE,
78 NET_IPV6_NBR_STATE_STATIC,
79 };
80
81 const char *net_ipv6_nbr_state2str(enum net_ipv6_nbr_state state);
82
83 /**
84 * @brief IPv6 neighbor information.
85 */
86 struct net_ipv6_nbr_data {
87 /** Any pending packet waiting ND to finish. */
88 struct net_pkt *pending;
89
90 /** IPv6 address. */
91 struct in6_addr addr;
92
93 /** Reachable timer. */
94 int64_t reachable;
95
96 /** Reachable timeout */
97 int32_t reachable_timeout;
98
99 /** Neighbor Solicitation reply timer */
100 int64_t send_ns;
101
102 /** State of the neighbor discovery */
103 enum net_ipv6_nbr_state state;
104
105 /** Link metric for the neighbor */
106 uint16_t link_metric;
107
108 /** How many times we have sent NS */
109 uint8_t ns_count;
110
111 /** Is the neighbor a router */
112 bool is_router;
113
114 #if defined(CONFIG_NET_IPV6_NBR_CACHE) || defined(CONFIG_NET_IPV6_ND)
115 /** Stale counter used to removed oldest nbr in STALE state,
116 * when table is full.
117 */
118 uint32_t stale_counter;
119 #endif
120 };
121
net_ipv6_nbr_data(struct net_nbr * nbr)122 static inline struct net_ipv6_nbr_data *net_ipv6_nbr_data(struct net_nbr *nbr)
123 {
124 return (struct net_ipv6_nbr_data *)nbr->data;
125 }
126
127 #if defined(CONFIG_NET_IPV6_DAD)
128 int net_ipv6_start_dad(struct net_if *iface, struct net_if_addr *ifaddr);
129 #endif
130
131 int net_ipv6_send_ns(struct net_if *iface, struct net_pkt *pending,
132 const struct in6_addr *src, const struct in6_addr *dst,
133 const struct in6_addr *tgt, bool is_my_address);
134
135 int net_ipv6_send_rs(struct net_if *iface);
136 int net_ipv6_start_rs(struct net_if *iface);
137
138 int net_ipv6_send_na(struct net_if *iface, const struct in6_addr *src,
139 const struct in6_addr *dst, const struct in6_addr *tgt,
140 uint8_t flags);
141
142
net_ipv6_is_nexthdr_upper_layer(uint8_t nexthdr)143 static inline bool net_ipv6_is_nexthdr_upper_layer(uint8_t nexthdr)
144 {
145 return (nexthdr == IPPROTO_ICMPV6 || nexthdr == IPPROTO_UDP ||
146 nexthdr == IPPROTO_TCP ||
147 (IS_ENABLED(CONFIG_NET_L2_VIRTUAL) &&
148 ((nexthdr == IPPROTO_IPV6) || (nexthdr == IPPROTO_IPIP))));
149 }
150
151 /**
152 * @brief Create IPv6 packet in provided net_pkt.
153 *
154 * @param pkt Network packet
155 * @param src Source IPv6 address
156 * @param dst Destination IPv6 address
157 *
158 * @return 0 on success, negative errno otherwise.
159 */
160 #if defined(CONFIG_NET_NATIVE_IPV6)
161 int net_ipv6_create(struct net_pkt *pkt,
162 const struct in6_addr *src,
163 const struct in6_addr *dst);
164 #else
net_ipv6_create(struct net_pkt * pkt,const struct in6_addr * src,const struct in6_addr * dst)165 static inline int net_ipv6_create(struct net_pkt *pkt,
166 const struct in6_addr *src,
167 const struct in6_addr *dst)
168 {
169 ARG_UNUSED(pkt);
170 ARG_UNUSED(src);
171 ARG_UNUSED(dst);
172
173 return -ENOTSUP;
174 }
175 #endif
176
177 /**
178 * @brief Finalize IPv6 packet. It should be called right before
179 * sending the packet and after all the data has been added into
180 * the packet. This function will set the length of the
181 * packet and calculate the higher protocol checksum if needed.
182 *
183 * @param pkt Network packet
184 * @param next_header_proto Protocol type of the next header after IPv6 header.
185 *
186 * @return 0 on success, negative errno otherwise.
187 */
188 #if defined(CONFIG_NET_NATIVE_IPV6)
189 int net_ipv6_finalize(struct net_pkt *pkt, uint8_t next_header_proto);
190 #else
net_ipv6_finalize(struct net_pkt * pkt,uint8_t next_header_proto)191 static inline int net_ipv6_finalize(struct net_pkt *pkt,
192 uint8_t next_header_proto)
193 {
194 ARG_UNUSED(pkt);
195 ARG_UNUSED(next_header_proto);
196
197 return -ENOTSUP;
198 }
199 #endif
200
201 /**
202 * @brief Send MLDv2 report message with a single entry.
203 *
204 * @param iface Network interface where message is sent
205 * @param addr Multicast group
206 * @param mode MLDv2 mode (NET_IPV6_MLDv2_MODE_IS_INCLUDE NET_IPV6_MLDv2_MODE_IS_EXCLUDE)
207 *
208 * @return Return 0 if leaving is done, <0 otherwise.
209 */
210 #if defined(CONFIG_NET_IPV6_MLD)
211 int net_ipv6_mld_send_single(struct net_if *iface, const struct in6_addr *addr, uint8_t mode);
212 #else
213 static inline int
net_ipv6_mld_send_single(struct net_if * iface,const struct in6_addr * addr,uint8_t mode)214 net_ipv6_mld_send_single(struct net_if *iface, const struct in6_addr *addr, uint8_t mode)
215 {
216 ARG_UNUSED(iface);
217 ARG_UNUSED(addr);
218 ARG_UNUSED(mode);
219
220 return -ENOTSUP;
221 }
222 #endif /* CONFIG_NET_IPV6_MLD */
223
224 /**
225 * @typedef net_nbr_cb_t
226 * @brief Callback used while iterating over neighbors.
227 *
228 * @param nbr A valid pointer on current neighbor.
229 * @param user_data A valid pointer on some user data or NULL
230 */
231 typedef void (*net_nbr_cb_t)(struct net_nbr *nbr, void *user_data);
232
233 /**
234 * @brief Make sure the link layer address is set according to
235 * destination address. If the ll address is not yet known, then
236 * start neighbor discovery to find it out. If ND needs to be done
237 * then the returned packet is the Neighbor Solicitation message
238 * and the original message is sent after Neighbor Advertisement
239 * message is received.
240 *
241 * @param pkt Network packet
242 *
243 * @return Return a verdict.
244 */
245 #if defined(CONFIG_NET_IPV6_NBR_CACHE) && defined(CONFIG_NET_NATIVE_IPV6)
246 enum net_verdict net_ipv6_prepare_for_send(struct net_pkt *pkt);
247 #else
net_ipv6_prepare_for_send(struct net_pkt * pkt)248 static inline enum net_verdict net_ipv6_prepare_for_send(struct net_pkt *pkt)
249 {
250 return NET_OK;
251 }
252 #endif
253
254 /**
255 * @brief Lock IPv6 Neighbor table mutex
256 *
257 * Neighbor table mutex is used by IPv6 Neighbor cache and IPv6 Routing module.
258 * Mutex shall be held whenever accessing or manipulating neighbor or routing
259 * table entries (for example when obtaining a pointer to the neighbor table
260 * entry). Neighbor and Routing API functions will lock the mutex when called.
261 */
262 void net_ipv6_nbr_lock(void);
263
264 /**
265 * @brief Unlock IPv6 Neighbor table mutex
266 */
267 void net_ipv6_nbr_unlock(void);
268
269 /**
270 * @brief Look for a neighbor from it's address on an iface
271 *
272 * @param iface A valid pointer on a network interface
273 * @param addr The IPv6 address to match
274 *
275 * @return A valid pointer on a neighbor on success, NULL otherwise
276 */
277 #if defined(CONFIG_NET_IPV6_NBR_CACHE) && defined(CONFIG_NET_NATIVE_IPV6)
278 struct net_nbr *net_ipv6_nbr_lookup(struct net_if *iface,
279 struct in6_addr *addr);
280 #else
net_ipv6_nbr_lookup(struct net_if * iface,struct in6_addr * addr)281 static inline struct net_nbr *net_ipv6_nbr_lookup(struct net_if *iface,
282 struct in6_addr *addr)
283 {
284 return NULL;
285 }
286 #endif
287
288 /**
289 * @brief Get neighbor from its index.
290 *
291 * @param iface Network interface to match. If NULL, then use
292 * whatever interface there is configured for the neighbor address.
293 * @param idx Index of the link layer address in the address array
294 *
295 * @return A valid pointer on a neighbor on success, NULL otherwise
296 */
297 struct net_nbr *net_ipv6_get_nbr(struct net_if *iface, uint8_t idx);
298
299 /**
300 * @brief Look for a neighbor from it's link local address index
301 *
302 * @param iface Network interface to match. If NULL, then use
303 * whatever interface there is configured for the neighbor address.
304 * @param idx Index of the link layer address in the address array
305 *
306 * @return A valid pointer on a neighbor on success, NULL otherwise
307 */
308 #if defined(CONFIG_NET_IPV6_NBR_CACHE) && defined(CONFIG_NET_NATIVE_IPV6)
309 struct in6_addr *net_ipv6_nbr_lookup_by_index(struct net_if *iface,
310 uint8_t idx);
311 #else
312 static inline
net_ipv6_nbr_lookup_by_index(struct net_if * iface,uint8_t idx)313 struct in6_addr *net_ipv6_nbr_lookup_by_index(struct net_if *iface,
314 uint8_t idx)
315 {
316 return NULL;
317 }
318 #endif
319
320 /**
321 * @brief Add a neighbor to neighbor cache
322 *
323 * Add a neighbor to the cache after performing a lookup and in case
324 * there exists an entry in the cache update its state and lladdr.
325 *
326 * @param iface A valid pointer on a network interface
327 * @param addr Neighbor IPv6 address
328 * @param lladdr Neighbor link layer address
329 * @param is_router Set to true if the neighbor is a router, false
330 * otherwise
331 * @param state Initial state of the neighbor entry in the cache
332 *
333 * @return A valid pointer on a neighbor on success, NULL otherwise
334 */
335 #if defined(CONFIG_NET_IPV6_NBR_CACHE) && defined(CONFIG_NET_NATIVE_IPV6)
336 struct net_nbr *net_ipv6_nbr_add(struct net_if *iface,
337 const struct in6_addr *addr,
338 const struct net_linkaddr *lladdr,
339 bool is_router,
340 enum net_ipv6_nbr_state state);
341 #else
net_ipv6_nbr_add(struct net_if * iface,const struct in6_addr * addr,const struct net_linkaddr * lladdr,bool is_router,enum net_ipv6_nbr_state state)342 static inline struct net_nbr *net_ipv6_nbr_add(struct net_if *iface,
343 const struct in6_addr *addr,
344 const struct net_linkaddr *lladdr,
345 bool is_router,
346 enum net_ipv6_nbr_state state)
347 {
348 return NULL;
349 }
350 #endif
351
352 /**
353 * @brief Remove a neighbor from neighbor cache.
354 *
355 * @param iface A valid pointer on a network interface
356 * @param addr Neighbor IPv6 address
357 *
358 * @return True if neighbor could be removed, False otherwise
359 */
360 #if defined(CONFIG_NET_IPV6_NBR_CACHE) && defined(CONFIG_NET_NATIVE_IPV6)
361 bool net_ipv6_nbr_rm(struct net_if *iface, struct in6_addr *addr);
362 #else
net_ipv6_nbr_rm(struct net_if * iface,struct in6_addr * addr)363 static inline bool net_ipv6_nbr_rm(struct net_if *iface, struct in6_addr *addr)
364 {
365 return true;
366 }
367 #endif
368
369 /**
370 * @brief Go through all the neighbors and call callback for each of them.
371 *
372 * @param cb User supplied callback function to call.
373 * @param user_data User specified data.
374 */
375 #if defined(CONFIG_NET_IPV6_NBR_CACHE) && defined(CONFIG_NET_NATIVE_IPV6)
376 void net_ipv6_nbr_foreach(net_nbr_cb_t cb, void *user_data);
377 #else /* CONFIG_NET_IPV6_NBR_CACHE */
net_ipv6_nbr_foreach(net_nbr_cb_t cb,void * user_data)378 static inline void net_ipv6_nbr_foreach(net_nbr_cb_t cb, void *user_data)
379 {
380 return;
381 }
382 #endif /* CONFIG_NET_IPV6_NBR_CACHE */
383
384 /**
385 * @brief Provide a reachability hint for IPv6 Neighbor Discovery.
386 *
387 * This function is intended for upper-layer protocols to inform the IPv6
388 * Neighbor Discovery process about the active link to a specific neighbor.
389 * By signaling recent "forward progress" event, such as the reception of
390 * an ACK, this function can help reducing unnecessary ND traffic as per the
391 * guidelines in RFC 4861 (section 7.3).
392 *
393 * @param iface A pointer to the network interface.
394 * @param ipv6_addr Pointer to the IPv6 address of the neighbor node.
395 */
396 #if defined(CONFIG_NET_IPV6_ND) && defined(CONFIG_NET_NATIVE_IPV6)
397 void net_ipv6_nbr_reachability_hint(struct net_if *iface, const struct in6_addr *ipv6_addr);
398 #else
net_ipv6_nbr_reachability_hint(struct net_if * iface,const struct in6_addr * ipv6_addr)399 static inline void net_ipv6_nbr_reachability_hint(struct net_if *iface,
400 const struct in6_addr *ipv6_addr)
401 {
402 ARG_UNUSED(iface);
403 ARG_UNUSED(ipv6_addr);
404 }
405 #endif
406
407 /**
408 * @brief Set the neighbor reachable timer.
409 *
410 * @param iface A valid pointer on a network interface
411 * @param nbr Neighbor struct pointer
412 */
413 #if defined(CONFIG_NET_IPV6_ND) && defined(CONFIG_NET_NATIVE_IPV6)
414 void net_ipv6_nbr_set_reachable_timer(struct net_if *iface,
415 struct net_nbr *nbr);
416
417 #else /* CONFIG_NET_IPV6_ND */
net_ipv6_nbr_set_reachable_timer(struct net_if * iface,struct net_nbr * nbr)418 static inline void net_ipv6_nbr_set_reachable_timer(struct net_if *iface,
419 struct net_nbr *nbr)
420 {
421 }
422 #endif
423
424 #if defined(CONFIG_NET_IPV6_FRAGMENT)
425 /** Store pending IPv6 fragment information that is needed for reassembly. */
426 struct net_ipv6_reassembly {
427 /** IPv6 source address of the fragment */
428 struct in6_addr src;
429
430 /** IPv6 destination address of the fragment */
431 struct in6_addr dst;
432
433 /**
434 * Timeout for cancelling the reassembly. The timer is used
435 * also to detect if this reassembly slot is used or not.
436 */
437 struct k_work_delayable timer;
438
439 /** Pointers to pending fragments */
440 struct net_pkt *pkt[CONFIG_NET_IPV6_FRAGMENT_MAX_PKT];
441
442 /** IPv6 fragment identification */
443 uint32_t id;
444 };
445 #else
446 struct net_ipv6_reassembly;
447 #endif
448
449 /**
450 * @typedef net_ipv6_frag_cb_t
451 * @brief Callback used while iterating over pending IPv6 fragments.
452 *
453 * @param reass IPv6 fragment reassembly struct
454 * @param user_data A valid pointer on some user data or NULL
455 */
456 typedef void (*net_ipv6_frag_cb_t)(struct net_ipv6_reassembly *reass,
457 void *user_data);
458
459 /**
460 * @brief Go through all the currently pending IPv6 fragments.
461 *
462 * @param cb Callback to call for each pending IPv6 fragment.
463 * @param user_data User specified data or NULL.
464 */
465 void net_ipv6_frag_foreach(net_ipv6_frag_cb_t cb, void *user_data);
466
467 /**
468 * @brief Find the last IPv6 extension header in the network packet.
469 *
470 * @param pkt Network head packet.
471 * @param next_hdr_off Offset of the next header field that points
472 * to last header. This is returned to caller.
473 * @param last_hdr_off Offset of the last header field in the packet.
474 * This is returned to caller.
475 *
476 * @return 0 on success, a negative errno otherwise.
477 */
478 int net_ipv6_find_last_ext_hdr(struct net_pkt *pkt, uint16_t *next_hdr_off,
479 uint16_t *last_hdr_off);
480
481 /**
482 * @brief Handles IPv6 fragmented packets.
483 *
484 * @param pkt Network head packet.
485 * @param hdr The IPv6 header of the current packet
486 * @param nexthdr IPv6 next header after fragment header part
487 *
488 * @return Return verdict about the packet
489 */
490 #if defined(CONFIG_NET_IPV6_FRAGMENT) && defined(CONFIG_NET_NATIVE_IPV6)
491 enum net_verdict net_ipv6_handle_fragment_hdr(struct net_pkt *pkt,
492 struct net_ipv6_hdr *hdr,
493 uint8_t nexthdr);
494 #else
495 static inline
net_ipv6_handle_fragment_hdr(struct net_pkt * pkt,struct net_ipv6_hdr * hdr,uint8_t nexthdr)496 enum net_verdict net_ipv6_handle_fragment_hdr(struct net_pkt *pkt,
497 struct net_ipv6_hdr *hdr,
498 uint8_t nexthdr)
499 {
500 ARG_UNUSED(pkt);
501 ARG_UNUSED(hdr);
502 ARG_UNUSED(nexthdr);
503
504 return NET_DROP;
505 }
506 #endif /* CONFIG_NET_IPV6_FRAGMENT */
507
508 #if defined(CONFIG_NET_NATIVE_IPV6)
509 void net_ipv6_init(void);
510 void net_ipv6_nbr_init(void);
511 #if defined(CONFIG_NET_IPV6_MLD)
512 void net_ipv6_mld_init(void);
513 #else
514 #define net_ipv6_mld_init(...)
515 #endif
516 #else
517 #define net_ipv6_init(...)
518 #define net_ipv6_nbr_init(...)
519 #endif
520
521 /**
522 * @brief Decode DSCP value from TC field.
523 *
524 * @param tc TC field value from the IPv6 header.
525 *
526 * @return Decoded DSCP value.
527 */
net_ipv6_get_dscp(uint8_t tc)528 static inline uint8_t net_ipv6_get_dscp(uint8_t tc)
529 {
530 return (tc & NET_IPV6_DSCP_MASK) >> NET_IPV6_DSCP_OFFSET;
531 }
532
533 /**
534 * @brief Encode DSCP value into TC field.
535 *
536 * @param tc A pointer to the TC field.
537 * @param dscp DSCP value to set.
538 */
net_ipv6_set_dscp(uint8_t * tc,uint8_t dscp)539 static inline void net_ipv6_set_dscp(uint8_t *tc, uint8_t dscp)
540 {
541 *tc &= ~NET_IPV6_DSCP_MASK;
542 *tc |= (dscp << NET_IPV6_DSCP_OFFSET) & NET_IPV6_DSCP_MASK;
543 }
544
545 /**
546 * @brief Convert DSCP value to priority.
547 *
548 * @param dscp DSCP value.
549 */
net_ipv6_dscp_to_priority(uint8_t dscp)550 static inline uint8_t net_ipv6_dscp_to_priority(uint8_t dscp)
551 {
552 return dscp >> 3;
553 }
554
555 /**
556 * @brief Decode ECN value from TC field.
557 *
558 * @param tc TC field value from the IPv6 header.
559 *
560 * @return Decoded ECN value.
561 */
net_ipv6_get_ecn(uint8_t tc)562 static inline uint8_t net_ipv6_get_ecn(uint8_t tc)
563 {
564 return tc & NET_IPV6_ECN_MASK;
565 }
566
567 /**
568 * @brief Encode ECN value into TC field.
569 *
570 * @param tc A pointer to the TC field.
571 * @param ecn ECN value to set.
572 */
net_ipv6_set_ecn(uint8_t * tc,uint8_t ecn)573 static inline void net_ipv6_set_ecn(uint8_t *tc, uint8_t ecn)
574 {
575 *tc &= ~NET_IPV6_ECN_MASK;
576 *tc |= ecn & NET_IPV6_ECN_MASK;
577 }
578
579 /**
580 * @brief Start IPv6 privacy extension procedure.
581 *
582 * @param iface Interface to use.
583 * @param prefix IPv6 prefix to use.
584 * @param vlifetime Lifetime of this IPv6 prefix (in seconds).
585 * @param preferred_lifetime Preferred lifetime of this IPv6 prefix (in seconds)
586 */
587 #if defined(CONFIG_NET_IPV6_PE)
588 void net_ipv6_pe_start(struct net_if *iface, const struct in6_addr *prefix,
589 uint32_t vlifetime, uint32_t preferred_lifetime);
590
591 #else
net_ipv6_pe_start(struct net_if * iface,const struct in6_addr * prefix,uint32_t vlifetime,uint32_t preferred_lifetime)592 static inline void net_ipv6_pe_start(struct net_if *iface,
593 const struct in6_addr *prefix,
594 uint32_t vlifetime,
595 uint32_t preferred_lifetime)
596 {
597 ARG_UNUSED(iface);
598 ARG_UNUSED(prefix);
599 ARG_UNUSED(vlifetime);
600 ARG_UNUSED(preferred_lifetime);
601 }
602 #endif /* CONFIG_NET_IPV6_PE */
603
604 /**
605 * @brief Check if maximum number of Duplicate Address Detection (DAD) requests
606 * have been done.
607 *
608 * @param count Number of DAD requests done.
609 *
610 * @return Return True if DAD can continue, False if max amount of DAD
611 * requests have been done.
612 */
613 #if defined(CONFIG_NET_IPV6_PE)
614 bool net_ipv6_pe_check_dad(int count);
615 #else
net_ipv6_pe_check_dad(int count)616 static inline bool net_ipv6_pe_check_dad(int count)
617 {
618 ARG_UNUSED(count);
619
620 return false;
621 }
622 #endif /* CONFIG_NET_IPV6_PE */
623
624 /**
625 * @brief Initialize IPv6 privacy extension support for a network interface.
626 *
627 * @param iface Network interface
628 *
629 * @return Return 0 if ok or <0 if there is an error.
630 */
631 #if defined(CONFIG_NET_IPV6_PE)
632 int net_ipv6_pe_init(struct net_if *iface);
633 #else
net_ipv6_pe_init(struct net_if * iface)634 static inline int net_ipv6_pe_init(struct net_if *iface)
635 {
636 iface->pe_enabled = false;
637 iface->pe_prefer_public = false;
638
639 return 0;
640 }
641 #endif /* CONFIG_NET_IPV6_PE */
642
643 typedef void (*net_ipv6_pe_filter_cb_t)(struct in6_addr *prefix,
644 bool is_blacklist,
645 void *user_data);
646
647 /**
648 * @brief Go through all the IPv6 privacy extension filters and call callback
649 * for each IPv6 prefix.
650 *
651 * @param cb User supplied callback function to call.
652 * @param user_data User specified data.
653 *
654 * @return Total number of filters found.
655 */
656 #if defined(CONFIG_NET_IPV6_PE)
657 int net_ipv6_pe_filter_foreach(net_ipv6_pe_filter_cb_t cb, void *user_data);
658 #else
net_ipv6_pe_filter_foreach(net_ipv6_pe_filter_cb_t cb,void * user_data)659 static inline int net_ipv6_pe_filter_foreach(net_ipv6_pe_filter_cb_t cb,
660 void *user_data)
661 {
662 ARG_UNUSED(cb);
663 ARG_UNUSED(user_data);
664
665 return 0;
666 }
667 #endif
668
669 #endif /* __IPV6_H */
670
