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.
7 * This file is part of the SCTP kernel reference Implementation
9 * The base lksctp header.
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)
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.
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.
28 * Please send any bug reports or fixes you make to the
30 * lksctp developers <lksctp-developers@lists.sourceforge.net>
32 * Or submit a bug report through the following website:
33 * http://www.sf.net/projects/lksctp
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>
45 * Any bugs reported given to us we will try to fix... any fixes shared will
46 * be incorporated into the next SCTP release.
49 #ifndef __net_sctp_h__
50 #define __net_sctp_h__
53 * Start getting some control over the header file depencies:
58 * macros, externs, and inlines
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.
69 #undef CONFIG_SCTP_DBG_OBJCNT
71 #endif /* TEST_FRAME */
73 #include <linux/types.h>
74 #include <linux/slab.h>
76 #include <linux/tty.h>
77 #include <linux/proc_fs.h>
78 #include <linux/spinlock.h>
79 #include <linux/jiffies.h>
80 #include <linux/idr.h>
82 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
84 #include <net/ip6_route.h>
87 #include <asm/uaccess.h>
91 #include <net/sctp/structs.h>
92 #include <net/sctp/constants.h>
95 /* Set SCTP_DEBUG flag via config if not already set. */
97 #ifdef CONFIG_SCTP_DBG_MSG
101 #endif /* CONFIG_SCTP_DBG */
102 #endif /* SCTP_DEBUG */
104 #ifdef CONFIG_IP_SCTP_MODULE
105 #define SCTP_PROTOSW_FLAG 0
107 #define SCTP_PROTOSW_FLAG INET_PROTOSW_PERMANENT
111 /* Certain internal static functions need to be exported when
112 * compiled into the test frame.
115 #define SCTP_STATIC static
119 * Function declarations.
125 extern struct sock *sctp_get_ctl_sock(void);
126 extern int sctp_copy_local_addr_list(struct sctp_bind_addr *,
127 sctp_scope_t, gfp_t gfp,
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);
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,
140 void sctp_sock_rfree(struct sk_buff *skb);
145 int sctp_primitive_ASSOCIATE(struct sctp_association *, void *arg);
146 int sctp_primitive_SHUTDOWN(struct sctp_association *, void *arg);
147 int sctp_primitive_ABORT(struct sctp_association *, void *arg);
148 int sctp_primitive_SEND(struct sctp_association *, void *arg);
149 int sctp_primitive_REQUESTHEARTBEAT(struct sctp_association *, void *arg);
150 int sctp_primitive_ASCONF(struct sctp_association *, void *arg);
155 __u32 sctp_start_cksum(__u8 *ptr, __u16 count);
156 __u32 sctp_update_cksum(__u8 *ptr, __u16 count, __u32 cksum);
157 __u32 sctp_end_cksum(__u32 cksum);
158 __u32 sctp_update_copy_cksum(__u8 *, __u8 *, __u16 count, __u32 cksum);
163 int sctp_rcv(struct sk_buff *skb);
164 void sctp_v4_err(struct sk_buff *skb, u32 info);
165 void sctp_hash_established(struct sctp_association *);
166 void sctp_unhash_established(struct sctp_association *);
167 void sctp_hash_endpoint(struct sctp_endpoint *);
168 void sctp_unhash_endpoint(struct sctp_endpoint *);
169 struct sock *sctp_err_lookup(int family, struct sk_buff *,
170 struct sctphdr *, struct sctp_association **,
171 struct sctp_transport **);
172 void sctp_err_finish(struct sock *, struct sctp_association *);
173 void sctp_icmp_frag_needed(struct sock *, struct sctp_association *,
174 struct sctp_transport *t, __u32 pmtu);
175 void sctp_icmp_proto_unreachable(struct sock *sk,
176 struct sctp_association *asoc,
177 struct sctp_transport *t);
178 void sctp_backlog_migrate(struct sctp_association *assoc,
179 struct sock *oldsk, struct sock *newsk);
184 int sctp_snmp_proc_init(void);
185 void sctp_snmp_proc_exit(void);
186 int sctp_eps_proc_init(void);
187 void sctp_eps_proc_exit(void);
188 int sctp_assocs_proc_init(void);
189 void sctp_assocs_proc_exit(void);
193 * Module global variables
199 extern struct kmem_cache *sctp_chunk_cachep __read_mostly;
200 extern struct kmem_cache *sctp_bucket_cachep __read_mostly;
203 * Section: Macros, externs, and inlines
208 #include <test_frame.h>
211 /* spin lock wrappers. */
212 #define sctp_spin_lock_irqsave(lock, flags) spin_lock_irqsave(lock, flags)
213 #define sctp_spin_unlock_irqrestore(lock, flags) \
214 spin_unlock_irqrestore(lock, flags)
215 #define sctp_local_bh_disable() local_bh_disable()
216 #define sctp_local_bh_enable() local_bh_enable()
217 #define sctp_spin_lock(lock) spin_lock(lock)
218 #define sctp_spin_unlock(lock) spin_unlock(lock)
219 #define sctp_write_lock(lock) write_lock(lock)
220 #define sctp_write_unlock(lock) write_unlock(lock)
221 #define sctp_read_lock(lock) read_lock(lock)
222 #define sctp_read_unlock(lock) read_unlock(lock)
224 /* sock lock wrappers. */
225 #define sctp_lock_sock(sk) lock_sock(sk)
226 #define sctp_release_sock(sk) release_sock(sk)
227 #define sctp_bh_lock_sock(sk) bh_lock_sock(sk)
228 #define sctp_bh_unlock_sock(sk) bh_unlock_sock(sk)
229 #define SCTP_SOCK_SLEEP_PRE(sk) SOCK_SLEEP_PRE(sk)
230 #define SCTP_SOCK_SLEEP_POST(sk) SOCK_SLEEP_POST(sk)
232 /* SCTP SNMP MIB stats handlers */
233 DECLARE_SNMP_STAT(struct sctp_mib, sctp_statistics);
234 #define SCTP_INC_STATS(field) SNMP_INC_STATS(sctp_statistics, field)
235 #define SCTP_INC_STATS_BH(field) SNMP_INC_STATS_BH(sctp_statistics, field)
236 #define SCTP_INC_STATS_USER(field) SNMP_INC_STATS_USER(sctp_statistics, field)
237 #define SCTP_DEC_STATS(field) SNMP_DEC_STATS(sctp_statistics, field)
239 #endif /* !TEST_FRAME */
241 /* sctp mib definitions */
245 SCTP_MIB_CURRESTAB, /* CurrEstab */
246 SCTP_MIB_ACTIVEESTABS, /* ActiveEstabs */
247 SCTP_MIB_PASSIVEESTABS, /* PassiveEstabs */
248 SCTP_MIB_ABORTEDS, /* Aborteds */
249 SCTP_MIB_SHUTDOWNS, /* Shutdowns */
250 SCTP_MIB_OUTOFBLUES, /* OutOfBlues */
251 SCTP_MIB_CHECKSUMERRORS, /* ChecksumErrors */
252 SCTP_MIB_OUTCTRLCHUNKS, /* OutCtrlChunks */
253 SCTP_MIB_OUTORDERCHUNKS, /* OutOrderChunks */
254 SCTP_MIB_OUTUNORDERCHUNKS, /* OutUnorderChunks */
255 SCTP_MIB_INCTRLCHUNKS, /* InCtrlChunks */
256 SCTP_MIB_INORDERCHUNKS, /* InOrderChunks */
257 SCTP_MIB_INUNORDERCHUNKS, /* InUnorderChunks */
258 SCTP_MIB_FRAGUSRMSGS, /* FragUsrMsgs */
259 SCTP_MIB_REASMUSRMSGS, /* ReasmUsrMsgs */
260 SCTP_MIB_OUTSCTPPACKS, /* OutSCTPPacks */
261 SCTP_MIB_INSCTPPACKS, /* InSCTPPacks */
262 SCTP_MIB_T1_INIT_EXPIREDS,
263 SCTP_MIB_T1_COOKIE_EXPIREDS,
264 SCTP_MIB_T2_SHUTDOWN_EXPIREDS,
265 SCTP_MIB_T3_RTX_EXPIREDS,
266 SCTP_MIB_T4_RTO_EXPIREDS,
267 SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS,
268 SCTP_MIB_DELAY_SACK_EXPIREDS,
269 SCTP_MIB_AUTOCLOSE_EXPIREDS,
270 SCTP_MIB_T3_RETRANSMITS,
271 SCTP_MIB_PMTUD_RETRANSMITS,
272 SCTP_MIB_FAST_RETRANSMITS,
273 SCTP_MIB_IN_PKT_SOFTIRQ,
274 SCTP_MIB_IN_PKT_BACKLOG,
275 SCTP_MIB_IN_PKT_DISCARDS,
276 SCTP_MIB_IN_DATA_CHUNK_DISCARDS,
280 #define SCTP_MIB_MAX __SCTP_MIB_MAX
282 unsigned long mibs[SCTP_MIB_MAX];
283 } __SNMP_MIB_ALIGN__;
286 /* Print debugging messages. */
288 extern int sctp_debug_flag;
289 #define SCTP_DEBUG_PRINTK(whatever...) \
290 ((void) (sctp_debug_flag && printk(KERN_DEBUG whatever)))
291 #define SCTP_DEBUG_PRINTK_IPADDR(lead, trail, leadparm, saddr, otherparms...) \
292 if (sctp_debug_flag) { \
293 if (saddr->sa.sa_family == AF_INET6) { \
295 lead NIP6_FMT trail, \
297 NIP6(saddr->v6.sin6_addr), \
301 lead NIPQUAD_FMT trail, \
303 NIPQUAD(saddr->v4.sin_addr.s_addr), \
307 #define SCTP_ENABLE_DEBUG { sctp_debug_flag = 1; }
308 #define SCTP_DISABLE_DEBUG { sctp_debug_flag = 0; }
310 #define SCTP_ASSERT(expr, str, func) \
312 SCTP_DEBUG_PRINTK("Assertion Failed: %s(%s) at %s:%s:%d\n", \
313 str, (#expr), __FILE__, __FUNCTION__, __LINE__); \
317 #else /* SCTP_DEBUG */
319 #define SCTP_DEBUG_PRINTK(whatever...)
320 #define SCTP_DEBUG_PRINTK_IPADDR(whatever...)
321 #define SCTP_ENABLE_DEBUG
322 #define SCTP_DISABLE_DEBUG
323 #define SCTP_ASSERT(expr, str, func)
325 #endif /* SCTP_DEBUG */
329 * Macros for keeping a global reference of object allocations.
331 #ifdef CONFIG_SCTP_DBG_OBJCNT
333 extern atomic_t sctp_dbg_objcnt_sock;
334 extern atomic_t sctp_dbg_objcnt_ep;
335 extern atomic_t sctp_dbg_objcnt_assoc;
336 extern atomic_t sctp_dbg_objcnt_transport;
337 extern atomic_t sctp_dbg_objcnt_chunk;
338 extern atomic_t sctp_dbg_objcnt_bind_addr;
339 extern atomic_t sctp_dbg_objcnt_bind_bucket;
340 extern atomic_t sctp_dbg_objcnt_addr;
341 extern atomic_t sctp_dbg_objcnt_ssnmap;
342 extern atomic_t sctp_dbg_objcnt_datamsg;
344 /* Macros to atomically increment/decrement objcnt counters. */
345 #define SCTP_DBG_OBJCNT_INC(name) \
346 atomic_inc(&sctp_dbg_objcnt_## name)
347 #define SCTP_DBG_OBJCNT_DEC(name) \
348 atomic_dec(&sctp_dbg_objcnt_## name)
349 #define SCTP_DBG_OBJCNT(name) \
350 atomic_t sctp_dbg_objcnt_## name = ATOMIC_INIT(0)
352 /* Macro to help create new entries in in the global array of
355 #define SCTP_DBG_OBJCNT_ENTRY(name) \
356 {.label= #name, .counter= &sctp_dbg_objcnt_## name}
358 void sctp_dbg_objcnt_init(void);
359 void sctp_dbg_objcnt_exit(void);
363 #define SCTP_DBG_OBJCNT_INC(name)
364 #define SCTP_DBG_OBJCNT_DEC(name)
366 static inline void sctp_dbg_objcnt_init(void) { return; }
367 static inline void sctp_dbg_objcnt_exit(void) { return; }
369 #endif /* CONFIG_SCTP_DBG_OBJCOUNT */
371 #if defined CONFIG_SYSCTL
372 void sctp_sysctl_register(void);
373 void sctp_sysctl_unregister(void);
375 static inline void sctp_sysctl_register(void) { return; }
376 static inline void sctp_sysctl_unregister(void) { return; }
377 static inline int sctp_sysctl_jiffies_ms(ctl_table *table, int __user *name, int nlen,
378 void __user *oldval, size_t __user *oldlenp,
379 void __user *newval, size_t newlen) {
384 /* Size of Supported Address Parameter for 'x' address types. */
385 #define SCTP_SAT_LEN(x) (sizeof(struct sctp_paramhdr) + (x) * sizeof(__u16))
387 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
389 int sctp_v6_init(void);
390 void sctp_v6_exit(void);
391 int sctp_v6_add_protocol(void);
392 void sctp_v6_del_protocol(void);
394 #else /* #ifdef defined(CONFIG_IPV6) */
396 static inline int sctp_v6_init(void) { return 0; }
397 static inline void sctp_v6_exit(void) { return; }
398 static inline int sctp_v6_add_protocol(void) { return 0; }
399 static inline void sctp_v6_del_protocol(void) { return; }
401 #endif /* #if defined(CONFIG_IPV6) */
404 /* Map an association to an assoc_id. */
405 static inline sctp_assoc_t sctp_assoc2id(const struct sctp_association *asoc)
407 return (asoc?asoc->assoc_id:0);
410 /* Look up the association by its id. */
411 struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id);
414 /* A macro to walk a list of skbs. */
415 #define sctp_skb_for_each(pos, head, tmp) \
416 for (pos = (head)->next;\
417 tmp = (pos)->next, pos != ((struct sk_buff *)(head));\
421 /* A helper to append an entire skb list (list) to another (head). */
422 static inline void sctp_skb_list_tail(struct sk_buff_head *list,
423 struct sk_buff_head *head)
427 sctp_spin_lock_irqsave(&head->lock, flags);
428 sctp_spin_lock(&list->lock);
430 list_splice((struct list_head *)list, (struct list_head *)head->prev);
432 head->qlen += list->qlen;
435 sctp_spin_unlock(&list->lock);
436 sctp_spin_unlock_irqrestore(&head->lock, flags);
440 * sctp_list_dequeue - remove from the head of the queue
441 * @list: list to dequeue from
443 * Remove the head of the list. The head item is
444 * returned or %NULL if the list is empty.
447 static inline struct list_head *sctp_list_dequeue(struct list_head *list)
449 struct list_head *result = NULL;
451 if (list->next != list) {
453 list->next = result->next;
454 list->next->prev = list;
455 INIT_LIST_HEAD(result);
460 /* SCTP version of skb_set_owner_r. We need this one because
461 * of the way we have to do receive buffer accounting on bundled
464 static inline void sctp_skb_set_owner_r(struct sk_buff *skb, struct sock *sk)
466 struct sctp_ulpevent *event = sctp_skb2event(skb);
469 skb->destructor = sctp_sock_rfree;
470 atomic_add(event->rmem_len, &sk->sk_rmem_alloc);
473 /* Tests if the list has one and only one entry. */
474 static inline int sctp_list_single_entry(struct list_head *head)
476 return ((head->next != head) && (head->next == head->prev));
479 /* Generate a random jitter in the range of -50% ~ +50% of input RTO. */
480 static inline __s32 sctp_jitter(__u32 rto)
482 static __u32 sctp_rand;
485 /* Avoid divide by zero. */
489 sctp_rand += jiffies;
490 sctp_rand ^= (sctp_rand << 12);
491 sctp_rand ^= (sctp_rand >> 20);
493 /* Choose random number from 0 to rto, then move to -50% ~ +50%
496 ret = sctp_rand % rto - (rto >> 1);
500 /* Break down data chunks at this point. */
501 static inline int sctp_frag_point(const struct sctp_sock *sp, int pmtu)
505 frag -= sp->pf->af->net_header_len;
506 frag -= sizeof(struct sctphdr) + sizeof(struct sctp_data_chunk);
509 frag = min_t(int, frag, sp->user_frag);
511 frag = min_t(int, frag, SCTP_MAX_CHUNK_LEN);
516 static inline void sctp_assoc_pending_pmtu(struct sctp_association *asoc)
519 sctp_assoc_sync_pmtu(asoc);
520 asoc->pmtu_pending = 0;
523 /* Walk through a list of TLV parameters. Don't trust the
524 * individual parameter lengths and instead depend on
525 * the chunk length to indicate when to stop. Make sure
526 * there is room for a param header too.
528 #define sctp_walk_params(pos, chunk, member)\
529 _sctp_walk_params((pos), (chunk), ntohs((chunk)->chunk_hdr.length), member)
531 #define _sctp_walk_params(pos, chunk, end, member)\
532 for (pos.v = chunk->member;\
533 pos.v <= (void *)chunk + end - sizeof(sctp_paramhdr_t) &&\
534 pos.v <= (void *)chunk + end - ntohs(pos.p->length) &&\
535 ntohs(pos.p->length) >= sizeof(sctp_paramhdr_t);\
536 pos.v += WORD_ROUND(ntohs(pos.p->length)))
538 #define sctp_walk_errors(err, chunk_hdr)\
539 _sctp_walk_errors((err), (chunk_hdr), ntohs((chunk_hdr)->length))
541 #define _sctp_walk_errors(err, chunk_hdr, end)\
542 for (err = (sctp_errhdr_t *)((void *)chunk_hdr + \
543 sizeof(sctp_chunkhdr_t));\
544 (void *)err <= (void *)chunk_hdr + end - sizeof(sctp_errhdr_t) &&\
545 (void *)err <= (void *)chunk_hdr + end - ntohs(err->length) &&\
546 ntohs(err->length) >= sizeof(sctp_errhdr_t); \
547 err = (sctp_errhdr_t *)((void *)err + WORD_ROUND(ntohs(err->length))))
549 #define sctp_walk_fwdtsn(pos, chunk)\
550 _sctp_walk_fwdtsn((pos), (chunk), ntohs((chunk)->chunk_hdr->length) - sizeof(struct sctp_fwdtsn_chunk))
552 #define _sctp_walk_fwdtsn(pos, chunk, end)\
553 for (pos = chunk->subh.fwdtsn_hdr->skip;\
554 (void *)pos <= (void *)chunk->subh.fwdtsn_hdr->skip + end - sizeof(struct sctp_fwdtsn_skip);\
557 /* Round an int up to the next multiple of 4. */
558 #define WORD_ROUND(s) (((s)+3)&~3)
560 /* Make a new instance of type. */
561 #define t_new(type, flags) (type *)kmalloc(sizeof(type), flags)
563 /* Compare two timevals. */
564 #define tv_lt(s, t) \
565 (s.tv_sec < t.tv_sec || (s.tv_sec == t.tv_sec && s.tv_usec < t.tv_usec))
567 /* Add tv1 to tv2. */
568 #define TIMEVAL_ADD(tv1, tv2) \
570 suseconds_t usecs = (tv2).tv_usec + (tv1).tv_usec; \
571 time_t secs = (tv2).tv_sec + (tv1).tv_sec; \
573 if (usecs >= 1000000) { \
577 (tv2).tv_sec = secs; \
578 (tv2).tv_usec = usecs; \
581 /* External references. */
583 extern struct proto sctp_prot;
584 extern struct proto sctpv6_prot;
585 extern struct proc_dir_entry *proc_net_sctp;
586 void sctp_put_port(struct sock *sk);
588 extern struct idr sctp_assocs_id;
589 extern spinlock_t sctp_assocs_id_lock;
591 /* Static inline functions. */
593 /* Convert from an IP version number to an Address Family symbol. */
594 static inline int ipver2af(__u8 ipver)
606 /* Convert from an address parameter type to an address family. */
607 static inline int param_type2af(__be16 type)
610 case SCTP_PARAM_IPV4_ADDRESS:
612 case SCTP_PARAM_IPV6_ADDRESS:
619 /* Perform some sanity checks. */
620 static inline int sctp_sanity_check(void)
622 SCTP_ASSERT(sizeof(struct sctp_ulpevent) <=
623 sizeof(((struct sk_buff *)0)->cb),
624 "SCTP: ulpevent does not fit in skb!\n", return 0);
629 /* Warning: The following hash functions assume a power of two 'size'. */
630 /* This is the hash function for the SCTP port hash table. */
631 static inline int sctp_phashfn(__u16 lport)
633 return (lport & (sctp_port_hashsize - 1));
636 /* This is the hash function for the endpoint hash table. */
637 static inline int sctp_ep_hashfn(__u16 lport)
639 return (lport & (sctp_ep_hashsize - 1));
642 /* This is the hash function for the association hash table. */
643 static inline int sctp_assoc_hashfn(__u16 lport, __u16 rport)
645 int h = (lport << 16) + rport;
647 return (h & (sctp_assoc_hashsize - 1));
650 /* This is the hash function for the association hash table. This is
651 * not used yet, but could be used as a better hash function when
654 static inline int sctp_vtag_hashfn(__u16 lport, __u16 rport, __u32 vtag)
656 int h = (lport << 16) + rport;
658 return (h & (sctp_assoc_hashsize-1));
661 /* Is a socket of this style? */
662 #define sctp_style(sk, style) __sctp_style((sk), (SCTP_SOCKET_##style))
663 static inline int __sctp_style(const struct sock *sk, sctp_socket_type_t style)
665 return sctp_sk(sk)->type == style;
668 /* Is the association in this state? */
669 #define sctp_state(asoc, state) __sctp_state((asoc), (SCTP_STATE_##state))
670 static inline int __sctp_state(const struct sctp_association *asoc,
673 return asoc->state == state;
676 /* Is the socket in this state? */
677 #define sctp_sstate(sk, state) __sctp_sstate((sk), (SCTP_SS_##state))
678 static inline int __sctp_sstate(const struct sock *sk, sctp_sock_state_t state)
680 return sk->sk_state == state;
683 /* Map v4-mapped v6 address back to v4 address */
684 static inline void sctp_v6_map_v4(union sctp_addr *addr)
686 addr->v4.sin_family = AF_INET;
687 addr->v4.sin_port = addr->v6.sin6_port;
688 addr->v4.sin_addr.s_addr = addr->v6.sin6_addr.s6_addr32[3];
691 /* Map v4 address to v4-mapped v6 address */
692 static inline void sctp_v4_map_v6(union sctp_addr *addr)
694 addr->v6.sin6_family = AF_INET6;
695 addr->v6.sin6_port = addr->v4.sin_port;
696 addr->v6.sin6_addr.s6_addr32[3] = addr->v4.sin_addr.s_addr;
697 addr->v6.sin6_addr.s6_addr32[0] = 0;
698 addr->v6.sin6_addr.s6_addr32[1] = 0;
699 addr->v6.sin6_addr.s6_addr32[2] = htonl(0x0000ffff);
702 #endif /* __net_sctp_h__ */