Linux-2.6.12-rc2
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / net / sctp / sctp.h
1 /* SCTP kernel reference Implementation
2 * (C) Copyright IBM Corp. 2001, 2004
3 * Copyright (c) 1999-2000 Cisco, Inc.
4 * Copyright (c) 1999-2001 Motorola, Inc.
5 * Copyright (c) 2001-2003 Intel Corp.
6 *
7 * This file is part of the SCTP kernel reference Implementation
8 *
9 * The base lksctp header.
10 *
11 * The SCTP reference implementation is free software;
12 * you can redistribute it and/or modify it under the terms of
13 * the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * The SCTP reference implementation is distributed in the hope that it
18 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
19 * ************************
20 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
21 * See the GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with GNU CC; see the file COPYING. If not, write to
25 * the Free Software Foundation, 59 Temple Place - Suite 330,
26 * Boston, MA 02111-1307, USA.
27 *
28 * Please send any bug reports or fixes you make to the
29 * email address(es):
30 * lksctp developers <lksctp-developers@lists.sourceforge.net>
31 *
32 * Or submit a bug report through the following website:
33 * http://www.sf.net/projects/lksctp
34 *
35 * Written or modified by:
36 * La Monte H.P. Yarroll <piggy@acm.org>
37 * Xingang Guo <xingang.guo@intel.com>
38 * Jon Grimm <jgrimm@us.ibm.com>
39 * Daisy Chang <daisyc@us.ibm.com>
40 * Sridhar Samudrala <sri@us.ibm.com>
41 * Ardelle Fan <ardelle.fan@intel.com>
42 * Ryan Layer <rmlayer@us.ibm.com>
43 * Kevin Gao <kevin.gao@intel.com>
44 *
45 * Any bugs reported given to us we will try to fix... any fixes shared will
46 * be incorporated into the next SCTP release.
47 */
48
49 #ifndef __net_sctp_h__
50 #define __net_sctp_h__
51
52 /* Header Strategy.
53 * Start getting some control over the header file depencies:
54 * includes
55 * constants
56 * structs
57 * prototypes
58 * macros, externs, and inlines
59 *
60 * Move test_frame specific items out of the kernel headers
61 * and into the test frame headers. This is not perfect in any sense
62 * and will continue to evolve.
63 */
64
65
66 #include <linux/config.h>
67
68 #ifdef TEST_FRAME
69 #undef CONFIG_PROC_FS
70 #undef CONFIG_SCTP_DBG_OBJCNT
71 #undef CONFIG_SYSCTL
72 #endif /* TEST_FRAME */
73
74 #include <linux/types.h>
75 #include <linux/slab.h>
76 #include <linux/in.h>
77 #include <linux/tty.h>
78 #include <linux/proc_fs.h>
79 #include <linux/spinlock.h>
80 #include <linux/jiffies.h>
81 #include <linux/idr.h>
82
83 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
84 #include <net/ipv6.h>
85 #include <net/ip6_route.h>
86 #endif
87
88 #include <asm/uaccess.h>
89 #include <asm/page.h>
90 #include <net/sock.h>
91 #include <net/snmp.h>
92 #include <net/sctp/structs.h>
93 #include <net/sctp/constants.h>
94
95
96 /* Set SCTP_DEBUG flag via config if not already set. */
97 #ifndef SCTP_DEBUG
98 #ifdef CONFIG_SCTP_DBG_MSG
99 #define SCTP_DEBUG 1
100 #else
101 #define SCTP_DEBUG 0
102 #endif /* CONFIG_SCTP_DBG */
103 #endif /* SCTP_DEBUG */
104
105 #ifdef CONFIG_IP_SCTP_MODULE
106 #define SCTP_PROTOSW_FLAG 0
107 #else /* static! */
108 #define SCTP_PROTOSW_FLAG INET_PROTOSW_PERMANENT
109 #endif
110
111
112 /* Certain internal static functions need to be exported when
113 * compiled into the test frame.
114 */
115 #ifndef SCTP_STATIC
116 #define SCTP_STATIC static
117 #endif
118
119 /*
120 * Function declarations.
121 */
122
123 /*
124 * sctp/protocol.c
125 */
126 extern struct sock *sctp_get_ctl_sock(void);
127 extern int sctp_copy_local_addr_list(struct sctp_bind_addr *,
128 sctp_scope_t, int gfp, int flags);
129 extern struct sctp_pf *sctp_get_pf_specific(sa_family_t family);
130 extern int sctp_register_pf(struct sctp_pf *, sa_family_t);
131
132 /*
133 * sctp/socket.c
134 */
135 int sctp_backlog_rcv(struct sock *sk, struct sk_buff *skb);
136 int sctp_inet_listen(struct socket *sock, int backlog);
137 void sctp_write_space(struct sock *sk);
138 unsigned int sctp_poll(struct file *file, struct socket *sock,
139 poll_table *wait);
140
141 /*
142 * sctp/primitive.c
143 */
144 int sctp_primitive_ASSOCIATE(struct sctp_association *, void *arg);
145 int sctp_primitive_SHUTDOWN(struct sctp_association *, void *arg);
146 int sctp_primitive_ABORT(struct sctp_association *, void *arg);
147 int sctp_primitive_SEND(struct sctp_association *, void *arg);
148 int sctp_primitive_REQUESTHEARTBEAT(struct sctp_association *, void *arg);
149 int sctp_primitive_ASCONF(struct sctp_association *, void *arg);
150
151 /*
152 * sctp/crc32c.c
153 */
154 __u32 sctp_start_cksum(__u8 *ptr, __u16 count);
155 __u32 sctp_update_cksum(__u8 *ptr, __u16 count, __u32 cksum);
156 __u32 sctp_end_cksum(__u32 cksum);
157 __u32 sctp_update_copy_cksum(__u8 *, __u8 *, __u16 count, __u32 cksum);
158
159 /*
160 * sctp/input.c
161 */
162 int sctp_rcv(struct sk_buff *skb);
163 void sctp_v4_err(struct sk_buff *skb, u32 info);
164 void sctp_hash_established(struct sctp_association *);
165 void sctp_unhash_established(struct sctp_association *);
166 void sctp_hash_endpoint(struct sctp_endpoint *);
167 void sctp_unhash_endpoint(struct sctp_endpoint *);
168 struct sock *sctp_err_lookup(int family, struct sk_buff *,
169 struct sctphdr *, struct sctp_endpoint **,
170 struct sctp_association **,
171 struct sctp_transport **);
172 void sctp_err_finish(struct sock *, struct sctp_endpoint *,
173 struct sctp_association *);
174 void sctp_icmp_frag_needed(struct sock *, struct sctp_association *,
175 struct sctp_transport *t, __u32 pmtu);
176 void sctp_icmp_proto_unreachable(struct sock *sk,
177 struct sctp_endpoint *ep,
178 struct sctp_association *asoc,
179 struct sctp_transport *t);
180
181 /*
182 * Section: Macros, externs, and inlines
183 */
184
185
186 #ifdef TEST_FRAME
187 #include <test_frame.h>
188 #else
189
190 /* spin lock wrappers. */
191 #define sctp_spin_lock_irqsave(lock, flags) spin_lock_irqsave(lock, flags)
192 #define sctp_spin_unlock_irqrestore(lock, flags) \
193 spin_unlock_irqrestore(lock, flags)
194 #define sctp_local_bh_disable() local_bh_disable()
195 #define sctp_local_bh_enable() local_bh_enable()
196 #define sctp_spin_lock(lock) spin_lock(lock)
197 #define sctp_spin_unlock(lock) spin_unlock(lock)
198 #define sctp_write_lock(lock) write_lock(lock)
199 #define sctp_write_unlock(lock) write_unlock(lock)
200 #define sctp_read_lock(lock) read_lock(lock)
201 #define sctp_read_unlock(lock) read_unlock(lock)
202
203 /* sock lock wrappers. */
204 #define sctp_lock_sock(sk) lock_sock(sk)
205 #define sctp_release_sock(sk) release_sock(sk)
206 #define sctp_bh_lock_sock(sk) bh_lock_sock(sk)
207 #define sctp_bh_unlock_sock(sk) bh_unlock_sock(sk)
208 #define SCTP_SOCK_SLEEP_PRE(sk) SOCK_SLEEP_PRE(sk)
209 #define SCTP_SOCK_SLEEP_POST(sk) SOCK_SLEEP_POST(sk)
210
211 /* SCTP SNMP MIB stats handlers */
212 DECLARE_SNMP_STAT(struct sctp_mib, sctp_statistics);
213 #define SCTP_INC_STATS(field) SNMP_INC_STATS(sctp_statistics, field)
214 #define SCTP_INC_STATS_BH(field) SNMP_INC_STATS_BH(sctp_statistics, field)
215 #define SCTP_INC_STATS_USER(field) SNMP_INC_STATS_USER(sctp_statistics, field)
216 #define SCTP_DEC_STATS(field) SNMP_DEC_STATS(sctp_statistics, field)
217
218 #endif /* !TEST_FRAME */
219
220
221 /* Print debugging messages. */
222 #if SCTP_DEBUG
223 extern int sctp_debug_flag;
224 #define SCTP_DEBUG_PRINTK(whatever...) \
225 ((void) (sctp_debug_flag && printk(KERN_DEBUG whatever)))
226 #define SCTP_ENABLE_DEBUG { sctp_debug_flag = 1; }
227 #define SCTP_DISABLE_DEBUG { sctp_debug_flag = 0; }
228
229 #define SCTP_ASSERT(expr, str, func) \
230 if (!(expr)) { \
231 SCTP_DEBUG_PRINTK("Assertion Failed: %s(%s) at %s:%s:%d\n", \
232 str, (#expr), __FILE__, __FUNCTION__, __LINE__); \
233 func; \
234 }
235
236 #else /* SCTP_DEBUG */
237
238 #define SCTP_DEBUG_PRINTK(whatever...)
239 #define SCTP_ENABLE_DEBUG
240 #define SCTP_DISABLE_DEBUG
241 #define SCTP_ASSERT(expr, str, func)
242
243 #endif /* SCTP_DEBUG */
244
245
246 /*
247 * Macros for keeping a global reference of object allocations.
248 */
249 #ifdef CONFIG_SCTP_DBG_OBJCNT
250
251 extern atomic_t sctp_dbg_objcnt_sock;
252 extern atomic_t sctp_dbg_objcnt_ep;
253 extern atomic_t sctp_dbg_objcnt_assoc;
254 extern atomic_t sctp_dbg_objcnt_transport;
255 extern atomic_t sctp_dbg_objcnt_chunk;
256 extern atomic_t sctp_dbg_objcnt_bind_addr;
257 extern atomic_t sctp_dbg_objcnt_bind_bucket;
258 extern atomic_t sctp_dbg_objcnt_addr;
259 extern atomic_t sctp_dbg_objcnt_ssnmap;
260 extern atomic_t sctp_dbg_objcnt_datamsg;
261
262 /* Macros to atomically increment/decrement objcnt counters. */
263 #define SCTP_DBG_OBJCNT_INC(name) \
264 atomic_inc(&sctp_dbg_objcnt_## name)
265 #define SCTP_DBG_OBJCNT_DEC(name) \
266 atomic_dec(&sctp_dbg_objcnt_## name)
267 #define SCTP_DBG_OBJCNT(name) \
268 atomic_t sctp_dbg_objcnt_## name = ATOMIC_INIT(0)
269
270 /* Macro to help create new entries in in the global array of
271 * objcnt counters.
272 */
273 #define SCTP_DBG_OBJCNT_ENTRY(name) \
274 {.label= #name, .counter= &sctp_dbg_objcnt_## name}
275
276 void sctp_dbg_objcnt_init(void);
277 void sctp_dbg_objcnt_exit(void);
278
279 #else
280
281 #define SCTP_DBG_OBJCNT_INC(name)
282 #define SCTP_DBG_OBJCNT_DEC(name)
283
284 static inline void sctp_dbg_objcnt_init(void) { return; }
285 static inline void sctp_dbg_objcnt_exit(void) { return; }
286
287 #endif /* CONFIG_SCTP_DBG_OBJCOUNT */
288
289 #if defined CONFIG_SYSCTL
290 void sctp_sysctl_register(void);
291 void sctp_sysctl_unregister(void);
292 #else
293 static inline void sctp_sysctl_register(void) { return; }
294 static inline void sctp_sysctl_unregister(void) { return; }
295 static inline int sctp_sysctl_jiffies_ms(ctl_table *table, int __user *name, int nlen,
296 void __user *oldval, size_t __user *oldlenp,
297 void __user *newval, size_t newlen, void **context) {
298 return -ENOSYS;
299 }
300 #endif
301
302 /* Size of Supported Address Parameter for 'x' address types. */
303 #define SCTP_SAT_LEN(x) (sizeof(struct sctp_paramhdr) + (x) * sizeof(__u16))
304
305 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
306
307 int sctp_v6_init(void);
308 void sctp_v6_exit(void);
309
310 #else /* #ifdef defined(CONFIG_IPV6) */
311
312 static inline int sctp_v6_init(void) { return 0; }
313 static inline void sctp_v6_exit(void) { return; }
314
315 #endif /* #if defined(CONFIG_IPV6) */
316
317 /* Some wrappers, in case crypto not available. */
318 #if defined (CONFIG_CRYPTO_HMAC)
319 #define sctp_crypto_alloc_tfm crypto_alloc_tfm
320 #define sctp_crypto_free_tfm crypto_free_tfm
321 #define sctp_crypto_hmac crypto_hmac
322 #else
323 #define sctp_crypto_alloc_tfm(x...) NULL
324 #define sctp_crypto_free_tfm(x...)
325 #define sctp_crypto_hmac(x...)
326 #endif
327
328
329 /* Map an association to an assoc_id. */
330 static inline sctp_assoc_t sctp_assoc2id(const struct sctp_association *asoc)
331 {
332 return (asoc?asoc->assoc_id:0);
333 }
334
335 /* Look up the association by its id. */
336 struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id);
337
338
339 /* A macro to walk a list of skbs. */
340 #define sctp_skb_for_each(pos, head, tmp) \
341 for (pos = (head)->next;\
342 tmp = (pos)->next, pos != ((struct sk_buff *)(head));\
343 pos = tmp)
344
345
346 /* A helper to append an entire skb list (list) to another (head). */
347 static inline void sctp_skb_list_tail(struct sk_buff_head *list,
348 struct sk_buff_head *head)
349 {
350 unsigned long flags;
351
352 sctp_spin_lock_irqsave(&head->lock, flags);
353 sctp_spin_lock(&list->lock);
354
355 list_splice((struct list_head *)list, (struct list_head *)head->prev);
356
357 head->qlen += list->qlen;
358 list->qlen = 0;
359
360 sctp_spin_unlock(&list->lock);
361 sctp_spin_unlock_irqrestore(&head->lock, flags);
362 }
363
364 /**
365 * sctp_list_dequeue - remove from the head of the queue
366 * @list: list to dequeue from
367 *
368 * Remove the head of the list. The head item is
369 * returned or %NULL if the list is empty.
370 */
371
372 static inline struct list_head *sctp_list_dequeue(struct list_head *list)
373 {
374 struct list_head *result = NULL;
375
376 if (list->next != list) {
377 result = list->next;
378 list->next = result->next;
379 list->next->prev = list;
380 INIT_LIST_HEAD(result);
381 }
382 return result;
383 }
384
385 /* Tests if the list has one and only one entry. */
386 static inline int sctp_list_single_entry(struct list_head *head)
387 {
388 return ((head->next != head) && (head->next == head->prev));
389 }
390
391 /* Calculate the size (in bytes) occupied by the data of an iovec. */
392 static inline size_t get_user_iov_size(struct iovec *iov, int iovlen)
393 {
394 size_t retval = 0;
395
396 for (; iovlen > 0; --iovlen) {
397 retval += iov->iov_len;
398 iov++;
399 }
400
401 return retval;
402 }
403
404 /* Generate a random jitter in the range of -50% ~ +50% of input RTO. */
405 static inline __s32 sctp_jitter(__u32 rto)
406 {
407 static __u32 sctp_rand;
408 __s32 ret;
409
410 /* Avoid divide by zero. */
411 if (!rto)
412 rto = 1;
413
414 sctp_rand += jiffies;
415 sctp_rand ^= (sctp_rand << 12);
416 sctp_rand ^= (sctp_rand >> 20);
417
418 /* Choose random number from 0 to rto, then move to -50% ~ +50%
419 * of rto.
420 */
421 ret = sctp_rand % rto - (rto >> 1);
422 return ret;
423 }
424
425 /* Break down data chunks at this point. */
426 static inline int sctp_frag_point(const struct sctp_sock *sp, int pmtu)
427 {
428 int frag = pmtu;
429
430 frag -= sp->pf->af->net_header_len;
431 frag -= sizeof(struct sctphdr) + sizeof(struct sctp_data_chunk);
432
433 if (sp->user_frag)
434 frag = min_t(int, frag, sp->user_frag);
435
436 frag = min_t(int, frag, SCTP_MAX_CHUNK_LEN);
437
438 return frag;
439 }
440
441 /* Walk through a list of TLV parameters. Don't trust the
442 * individual parameter lengths and instead depend on
443 * the chunk length to indicate when to stop. Make sure
444 * there is room for a param header too.
445 */
446 #define sctp_walk_params(pos, chunk, member)\
447 _sctp_walk_params((pos), (chunk), WORD_ROUND(ntohs((chunk)->chunk_hdr.length)), member)
448
449 #define _sctp_walk_params(pos, chunk, end, member)\
450 for (pos.v = chunk->member;\
451 pos.v <= (void *)chunk + end - sizeof(sctp_paramhdr_t) &&\
452 pos.v <= (void *)chunk + end - WORD_ROUND(ntohs(pos.p->length)) &&\
453 ntohs(pos.p->length) >= sizeof(sctp_paramhdr_t);\
454 pos.v += WORD_ROUND(ntohs(pos.p->length)))
455
456 #define sctp_walk_errors(err, chunk_hdr)\
457 _sctp_walk_errors((err), (chunk_hdr), ntohs((chunk_hdr)->length))
458
459 #define _sctp_walk_errors(err, chunk_hdr, end)\
460 for (err = (sctp_errhdr_t *)((void *)chunk_hdr + \
461 sizeof(sctp_chunkhdr_t));\
462 (void *)err <= (void *)chunk_hdr + end - sizeof(sctp_errhdr_t) &&\
463 (void *)err <= (void *)chunk_hdr + end - WORD_ROUND(ntohs(err->length)) &&\
464 ntohs(err->length) >= sizeof(sctp_errhdr_t); \
465 err = (sctp_errhdr_t *)((void *)err + WORD_ROUND(ntohs(err->length))))
466
467 #define sctp_walk_fwdtsn(pos, chunk)\
468 _sctp_walk_fwdtsn((pos), (chunk), ntohs((chunk)->chunk_hdr->length) - sizeof(struct sctp_fwdtsn_chunk))
469
470 #define _sctp_walk_fwdtsn(pos, chunk, end)\
471 for (pos = chunk->subh.fwdtsn_hdr->skip;\
472 (void *)pos <= (void *)chunk->subh.fwdtsn_hdr->skip + end - sizeof(struct sctp_fwdtsn_skip);\
473 pos++)
474
475 /* Round an int up to the next multiple of 4. */
476 #define WORD_ROUND(s) (((s)+3)&~3)
477
478 /* Make a new instance of type. */
479 #define t_new(type, flags) (type *)kmalloc(sizeof(type), flags)
480
481 /* Compare two timevals. */
482 #define tv_lt(s, t) \
483 (s.tv_sec < t.tv_sec || (s.tv_sec == t.tv_sec && s.tv_usec < t.tv_usec))
484
485 /* Add tv1 to tv2. */
486 #define TIMEVAL_ADD(tv1, tv2) \
487 ({ \
488 suseconds_t usecs = (tv2).tv_usec + (tv1).tv_usec; \
489 time_t secs = (tv2).tv_sec + (tv1).tv_sec; \
490 \
491 if (usecs >= 1000000) { \
492 usecs -= 1000000; \
493 secs++; \
494 } \
495 (tv2).tv_sec = secs; \
496 (tv2).tv_usec = usecs; \
497 })
498
499 /* External references. */
500
501 extern struct proto sctp_prot;
502 extern struct proto sctpv6_prot;
503 extern struct proc_dir_entry *proc_net_sctp;
504 void sctp_put_port(struct sock *sk);
505
506 extern struct idr sctp_assocs_id;
507 extern spinlock_t sctp_assocs_id_lock;
508
509 /* Static inline functions. */
510
511 /* Convert from an IP version number to an Address Family symbol. */
512 static inline int ipver2af(__u8 ipver)
513 {
514 switch (ipver) {
515 case 4:
516 return AF_INET;
517 case 6:
518 return AF_INET6;
519 default:
520 return 0;
521 };
522 }
523
524 /* Convert from an address parameter type to an address family. */
525 static inline int param_type2af(__u16 type)
526 {
527 switch (type) {
528 case SCTP_PARAM_IPV4_ADDRESS:
529 return AF_INET;
530 case SCTP_PARAM_IPV6_ADDRESS:
531 return AF_INET6;
532 default:
533 return 0;
534 };
535 }
536
537 /* Perform some sanity checks. */
538 static inline int sctp_sanity_check(void)
539 {
540 SCTP_ASSERT(sizeof(struct sctp_ulpevent) <=
541 sizeof(((struct sk_buff *)0)->cb),
542 "SCTP: ulpevent does not fit in skb!\n", return 0);
543
544 return 1;
545 }
546
547 /* Warning: The following hash functions assume a power of two 'size'. */
548 /* This is the hash function for the SCTP port hash table. */
549 static inline int sctp_phashfn(__u16 lport)
550 {
551 return (lport & (sctp_port_hashsize - 1));
552 }
553
554 /* This is the hash function for the endpoint hash table. */
555 static inline int sctp_ep_hashfn(__u16 lport)
556 {
557 return (lport & (sctp_ep_hashsize - 1));
558 }
559
560 /* This is the hash function for the association hash table. */
561 static inline int sctp_assoc_hashfn(__u16 lport, __u16 rport)
562 {
563 int h = (lport << 16) + rport;
564 h ^= h>>8;
565 return (h & (sctp_assoc_hashsize - 1));
566 }
567
568 /* This is the hash function for the association hash table. This is
569 * not used yet, but could be used as a better hash function when
570 * we have a vtag.
571 */
572 static inline int sctp_vtag_hashfn(__u16 lport, __u16 rport, __u32 vtag)
573 {
574 int h = (lport << 16) + rport;
575 h ^= vtag;
576 return (h & (sctp_assoc_hashsize-1));
577 }
578
579 /* Is a socket of this style? */
580 #define sctp_style(sk, style) __sctp_style((sk), (SCTP_SOCKET_##style))
581 static inline int __sctp_style(const struct sock *sk, sctp_socket_type_t style)
582 {
583 return sctp_sk(sk)->type == style;
584 }
585
586 /* Is the association in this state? */
587 #define sctp_state(asoc, state) __sctp_state((asoc), (SCTP_STATE_##state))
588 static inline int __sctp_state(const struct sctp_association *asoc,
589 sctp_state_t state)
590 {
591 return asoc->state == state;
592 }
593
594 /* Is the socket in this state? */
595 #define sctp_sstate(sk, state) __sctp_sstate((sk), (SCTP_SS_##state))
596 static inline int __sctp_sstate(const struct sock *sk, sctp_sock_state_t state)
597 {
598 return sk->sk_state == state;
599 }
600
601 /* Map v4-mapped v6 address back to v4 address */
602 static inline void sctp_v6_map_v4(union sctp_addr *addr)
603 {
604 addr->v4.sin_family = AF_INET;
605 addr->v4.sin_port = addr->v6.sin6_port;
606 addr->v4.sin_addr.s_addr = addr->v6.sin6_addr.s6_addr32[3];
607 }
608
609 /* Map v4 address to v4-mapped v6 address */
610 static inline void sctp_v4_map_v6(union sctp_addr *addr)
611 {
612 addr->v6.sin6_family = AF_INET6;
613 addr->v6.sin6_port = addr->v4.sin_port;
614 addr->v6.sin6_addr.s6_addr32[3] = addr->v4.sin_addr.s_addr;
615 addr->v6.sin6_addr.s6_addr32[0] = 0;
616 addr->v6.sin6_addr.s6_addr32[1] = 0;
617 addr->v6.sin6_addr.s6_addr32[2] = htonl(0x0000ffff);
618 }
619
620 #endif /* __net_sctp_h__ */