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 * Section: Macros, externs, and inlines
198 #include <test_frame.h>
201 /* spin lock wrappers. */
202 #define sctp_spin_lock_irqsave(lock, flags) spin_lock_irqsave(lock, flags)
203 #define sctp_spin_unlock_irqrestore(lock, flags) \
204 spin_unlock_irqrestore(lock, flags)
205 #define sctp_local_bh_disable() local_bh_disable()
206 #define sctp_local_bh_enable() local_bh_enable()
207 #define sctp_spin_lock(lock) spin_lock(lock)
208 #define sctp_spin_unlock(lock) spin_unlock(lock)
209 #define sctp_write_lock(lock) write_lock(lock)
210 #define sctp_write_unlock(lock) write_unlock(lock)
211 #define sctp_read_lock(lock) read_lock(lock)
212 #define sctp_read_unlock(lock) read_unlock(lock)
214 /* sock lock wrappers. */
215 #define sctp_lock_sock(sk) lock_sock(sk)
216 #define sctp_release_sock(sk) release_sock(sk)
217 #define sctp_bh_lock_sock(sk) bh_lock_sock(sk)
218 #define sctp_bh_unlock_sock(sk) bh_unlock_sock(sk)
219 #define SCTP_SOCK_SLEEP_PRE(sk) SOCK_SLEEP_PRE(sk)
220 #define SCTP_SOCK_SLEEP_POST(sk) SOCK_SLEEP_POST(sk)
222 /* SCTP SNMP MIB stats handlers */
223 DECLARE_SNMP_STAT(struct sctp_mib
, sctp_statistics
);
224 #define SCTP_INC_STATS(field) SNMP_INC_STATS(sctp_statistics, field)
225 #define SCTP_INC_STATS_BH(field) SNMP_INC_STATS_BH(sctp_statistics, field)
226 #define SCTP_INC_STATS_USER(field) SNMP_INC_STATS_USER(sctp_statistics, field)
227 #define SCTP_DEC_STATS(field) SNMP_DEC_STATS(sctp_statistics, field)
229 #endif /* !TEST_FRAME */
231 /* sctp mib definitions */
235 SCTP_MIB_CURRESTAB
, /* CurrEstab */
236 SCTP_MIB_ACTIVEESTABS
, /* ActiveEstabs */
237 SCTP_MIB_PASSIVEESTABS
, /* PassiveEstabs */
238 SCTP_MIB_ABORTEDS
, /* Aborteds */
239 SCTP_MIB_SHUTDOWNS
, /* Shutdowns */
240 SCTP_MIB_OUTOFBLUES
, /* OutOfBlues */
241 SCTP_MIB_CHECKSUMERRORS
, /* ChecksumErrors */
242 SCTP_MIB_OUTCTRLCHUNKS
, /* OutCtrlChunks */
243 SCTP_MIB_OUTORDERCHUNKS
, /* OutOrderChunks */
244 SCTP_MIB_OUTUNORDERCHUNKS
, /* OutUnorderChunks */
245 SCTP_MIB_INCTRLCHUNKS
, /* InCtrlChunks */
246 SCTP_MIB_INORDERCHUNKS
, /* InOrderChunks */
247 SCTP_MIB_INUNORDERCHUNKS
, /* InUnorderChunks */
248 SCTP_MIB_FRAGUSRMSGS
, /* FragUsrMsgs */
249 SCTP_MIB_REASMUSRMSGS
, /* ReasmUsrMsgs */
250 SCTP_MIB_OUTSCTPPACKS
, /* OutSCTPPacks */
251 SCTP_MIB_INSCTPPACKS
, /* InSCTPPacks */
252 SCTP_MIB_T1_INIT_EXPIREDS
,
253 SCTP_MIB_T1_COOKIE_EXPIREDS
,
254 SCTP_MIB_T2_SHUTDOWN_EXPIREDS
,
255 SCTP_MIB_T3_RTX_EXPIREDS
,
256 SCTP_MIB_T4_RTO_EXPIREDS
,
257 SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS
,
258 SCTP_MIB_DELAY_SACK_EXPIREDS
,
259 SCTP_MIB_AUTOCLOSE_EXPIREDS
,
260 SCTP_MIB_T3_RETRANSMITS
,
261 SCTP_MIB_PMTUD_RETRANSMITS
,
262 SCTP_MIB_FAST_RETRANSMITS
,
263 SCTP_MIB_IN_PKT_SOFTIRQ
,
264 SCTP_MIB_IN_PKT_BACKLOG
,
265 SCTP_MIB_IN_PKT_DISCARDS
,
266 SCTP_MIB_IN_DATA_CHUNK_DISCARDS
,
270 #define SCTP_MIB_MAX __SCTP_MIB_MAX
272 unsigned long mibs
[SCTP_MIB_MAX
];
273 } __SNMP_MIB_ALIGN__
;
276 /* Print debugging messages. */
278 extern int sctp_debug_flag
;
279 #define SCTP_DEBUG_PRINTK(whatever...) \
280 ((void) (sctp_debug_flag && printk(KERN_DEBUG whatever)))
281 #define SCTP_DEBUG_PRINTK_IPADDR(lead, trail, leadparm, saddr, otherparms...) \
282 if (sctp_debug_flag) { \
283 if (saddr->sa.sa_family == AF_INET6) { \
285 lead NIP6_FMT trail, \
287 NIP6(saddr->v6.sin6_addr), \
291 lead NIPQUAD_FMT trail, \
293 NIPQUAD(saddr->v4.sin_addr.s_addr), \
297 #define SCTP_ENABLE_DEBUG { sctp_debug_flag = 1; }
298 #define SCTP_DISABLE_DEBUG { sctp_debug_flag = 0; }
300 #define SCTP_ASSERT(expr, str, func) \
302 SCTP_DEBUG_PRINTK("Assertion Failed: %s(%s) at %s:%s:%d\n", \
303 str, (#expr), __FILE__, __FUNCTION__, __LINE__); \
307 #else /* SCTP_DEBUG */
309 #define SCTP_DEBUG_PRINTK(whatever...)
310 #define SCTP_DEBUG_PRINTK_IPADDR(whatever...)
311 #define SCTP_ENABLE_DEBUG
312 #define SCTP_DISABLE_DEBUG
313 #define SCTP_ASSERT(expr, str, func)
315 #endif /* SCTP_DEBUG */
319 * Macros for keeping a global reference of object allocations.
321 #ifdef CONFIG_SCTP_DBG_OBJCNT
323 extern atomic_t sctp_dbg_objcnt_sock
;
324 extern atomic_t sctp_dbg_objcnt_ep
;
325 extern atomic_t sctp_dbg_objcnt_assoc
;
326 extern atomic_t sctp_dbg_objcnt_transport
;
327 extern atomic_t sctp_dbg_objcnt_chunk
;
328 extern atomic_t sctp_dbg_objcnt_bind_addr
;
329 extern atomic_t sctp_dbg_objcnt_bind_bucket
;
330 extern atomic_t sctp_dbg_objcnt_addr
;
331 extern atomic_t sctp_dbg_objcnt_ssnmap
;
332 extern atomic_t sctp_dbg_objcnt_datamsg
;
334 /* Macros to atomically increment/decrement objcnt counters. */
335 #define SCTP_DBG_OBJCNT_INC(name) \
336 atomic_inc(&sctp_dbg_objcnt_## name)
337 #define SCTP_DBG_OBJCNT_DEC(name) \
338 atomic_dec(&sctp_dbg_objcnt_## name)
339 #define SCTP_DBG_OBJCNT(name) \
340 atomic_t sctp_dbg_objcnt_## name = ATOMIC_INIT(0)
342 /* Macro to help create new entries in in the global array of
345 #define SCTP_DBG_OBJCNT_ENTRY(name) \
346 {.label= #name, .counter= &sctp_dbg_objcnt_## name}
348 void sctp_dbg_objcnt_init(void);
349 void sctp_dbg_objcnt_exit(void);
353 #define SCTP_DBG_OBJCNT_INC(name)
354 #define SCTP_DBG_OBJCNT_DEC(name)
356 static inline void sctp_dbg_objcnt_init(void) { return; }
357 static inline void sctp_dbg_objcnt_exit(void) { return; }
359 #endif /* CONFIG_SCTP_DBG_OBJCOUNT */
361 #if defined CONFIG_SYSCTL
362 void sctp_sysctl_register(void);
363 void sctp_sysctl_unregister(void);
365 static inline void sctp_sysctl_register(void) { return; }
366 static inline void sctp_sysctl_unregister(void) { return; }
367 static inline int sctp_sysctl_jiffies_ms(ctl_table
*table
, int __user
*name
, int nlen
,
368 void __user
*oldval
, size_t __user
*oldlenp
,
369 void __user
*newval
, size_t newlen
) {
374 /* Size of Supported Address Parameter for 'x' address types. */
375 #define SCTP_SAT_LEN(x) (sizeof(struct sctp_paramhdr) + (x) * sizeof(__u16))
377 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
379 int sctp_v6_init(void);
380 void sctp_v6_exit(void);
381 int sctp_v6_add_protocol(void);
382 void sctp_v6_del_protocol(void);
384 #else /* #ifdef defined(CONFIG_IPV6) */
386 static inline int sctp_v6_init(void) { return 0; }
387 static inline void sctp_v6_exit(void) { return; }
388 static inline int sctp_v6_add_protocol(void) { return 0; }
389 static inline void sctp_v6_del_protocol(void) { return; }
391 #endif /* #if defined(CONFIG_IPV6) */
394 /* Map an association to an assoc_id. */
395 static inline sctp_assoc_t
sctp_assoc2id(const struct sctp_association
*asoc
)
397 return (asoc
?asoc
->assoc_id
:0);
400 /* Look up the association by its id. */
401 struct sctp_association
*sctp_id2assoc(struct sock
*sk
, sctp_assoc_t id
);
404 /* A macro to walk a list of skbs. */
405 #define sctp_skb_for_each(pos, head, tmp) \
406 for (pos = (head)->next;\
407 tmp = (pos)->next, pos != ((struct sk_buff *)(head));\
411 /* A helper to append an entire skb list (list) to another (head). */
412 static inline void sctp_skb_list_tail(struct sk_buff_head
*list
,
413 struct sk_buff_head
*head
)
417 sctp_spin_lock_irqsave(&head
->lock
, flags
);
418 sctp_spin_lock(&list
->lock
);
420 list_splice((struct list_head
*)list
, (struct list_head
*)head
->prev
);
422 head
->qlen
+= list
->qlen
;
425 sctp_spin_unlock(&list
->lock
);
426 sctp_spin_unlock_irqrestore(&head
->lock
, flags
);
430 * sctp_list_dequeue - remove from the head of the queue
431 * @list: list to dequeue from
433 * Remove the head of the list. The head item is
434 * returned or %NULL if the list is empty.
437 static inline struct list_head
*sctp_list_dequeue(struct list_head
*list
)
439 struct list_head
*result
= NULL
;
441 if (list
->next
!= list
) {
443 list
->next
= result
->next
;
444 list
->next
->prev
= list
;
445 INIT_LIST_HEAD(result
);
450 /* SCTP version of skb_set_owner_r. We need this one because
451 * of the way we have to do receive buffer accounting on bundled
454 static inline void sctp_skb_set_owner_r(struct sk_buff
*skb
, struct sock
*sk
)
456 struct sctp_ulpevent
*event
= sctp_skb2event(skb
);
459 skb
->destructor
= sctp_sock_rfree
;
460 atomic_add(event
->rmem_len
, &sk
->sk_rmem_alloc
);
463 /* Tests if the list has one and only one entry. */
464 static inline int sctp_list_single_entry(struct list_head
*head
)
466 return ((head
->next
!= head
) && (head
->next
== head
->prev
));
469 /* Generate a random jitter in the range of -50% ~ +50% of input RTO. */
470 static inline __s32
sctp_jitter(__u32 rto
)
472 static __u32 sctp_rand
;
475 /* Avoid divide by zero. */
479 sctp_rand
+= jiffies
;
480 sctp_rand
^= (sctp_rand
<< 12);
481 sctp_rand
^= (sctp_rand
>> 20);
483 /* Choose random number from 0 to rto, then move to -50% ~ +50%
486 ret
= sctp_rand
% rto
- (rto
>> 1);
490 /* Break down data chunks at this point. */
491 static inline int sctp_frag_point(const struct sctp_sock
*sp
, int pmtu
)
495 frag
-= sp
->pf
->af
->net_header_len
;
496 frag
-= sizeof(struct sctphdr
) + sizeof(struct sctp_data_chunk
);
499 frag
= min_t(int, frag
, sp
->user_frag
);
501 frag
= min_t(int, frag
, SCTP_MAX_CHUNK_LEN
);
506 /* Walk through a list of TLV parameters. Don't trust the
507 * individual parameter lengths and instead depend on
508 * the chunk length to indicate when to stop. Make sure
509 * there is room for a param header too.
511 #define sctp_walk_params(pos, chunk, member)\
512 _sctp_walk_params((pos), (chunk), ntohs((chunk)->chunk_hdr.length), member)
514 #define _sctp_walk_params(pos, chunk, end, member)\
515 for (pos.v = chunk->member;\
516 pos.v <= (void *)chunk + end - sizeof(sctp_paramhdr_t) &&\
517 pos.v <= (void *)chunk + end - ntohs(pos.p->length) &&\
518 ntohs(pos.p->length) >= sizeof(sctp_paramhdr_t);\
519 pos.v += WORD_ROUND(ntohs(pos.p->length)))
521 #define sctp_walk_errors(err, chunk_hdr)\
522 _sctp_walk_errors((err), (chunk_hdr), ntohs((chunk_hdr)->length))
524 #define _sctp_walk_errors(err, chunk_hdr, end)\
525 for (err = (sctp_errhdr_t *)((void *)chunk_hdr + \
526 sizeof(sctp_chunkhdr_t));\
527 (void *)err <= (void *)chunk_hdr + end - sizeof(sctp_errhdr_t) &&\
528 (void *)err <= (void *)chunk_hdr + end - ntohs(err->length) &&\
529 ntohs(err->length) >= sizeof(sctp_errhdr_t); \
530 err = (sctp_errhdr_t *)((void *)err + WORD_ROUND(ntohs(err->length))))
532 #define sctp_walk_fwdtsn(pos, chunk)\
533 _sctp_walk_fwdtsn((pos), (chunk), ntohs((chunk)->chunk_hdr->length) - sizeof(struct sctp_fwdtsn_chunk))
535 #define _sctp_walk_fwdtsn(pos, chunk, end)\
536 for (pos = chunk->subh.fwdtsn_hdr->skip;\
537 (void *)pos <= (void *)chunk->subh.fwdtsn_hdr->skip + end - sizeof(struct sctp_fwdtsn_skip);\
540 /* Round an int up to the next multiple of 4. */
541 #define WORD_ROUND(s) (((s)+3)&~3)
543 /* Make a new instance of type. */
544 #define t_new(type, flags) (type *)kmalloc(sizeof(type), flags)
546 /* Compare two timevals. */
547 #define tv_lt(s, t) \
548 (s.tv_sec < t.tv_sec || (s.tv_sec == t.tv_sec && s.tv_usec < t.tv_usec))
550 /* Add tv1 to tv2. */
551 #define TIMEVAL_ADD(tv1, tv2) \
553 suseconds_t usecs = (tv2).tv_usec + (tv1).tv_usec; \
554 time_t secs = (tv2).tv_sec + (tv1).tv_sec; \
556 if (usecs >= 1000000) { \
560 (tv2).tv_sec = secs; \
561 (tv2).tv_usec = usecs; \
564 /* External references. */
566 extern struct proto sctp_prot
;
567 extern struct proto sctpv6_prot
;
568 extern struct proc_dir_entry
*proc_net_sctp
;
569 void sctp_put_port(struct sock
*sk
);
571 extern struct idr sctp_assocs_id
;
572 extern spinlock_t sctp_assocs_id_lock
;
574 /* Static inline functions. */
576 /* Convert from an IP version number to an Address Family symbol. */
577 static inline int ipver2af(__u8 ipver
)
589 /* Convert from an address parameter type to an address family. */
590 static inline int param_type2af(__be16 type
)
593 case SCTP_PARAM_IPV4_ADDRESS
:
595 case SCTP_PARAM_IPV6_ADDRESS
:
602 /* Perform some sanity checks. */
603 static inline int sctp_sanity_check(void)
605 SCTP_ASSERT(sizeof(struct sctp_ulpevent
) <=
606 sizeof(((struct sk_buff
*)0)->cb
),
607 "SCTP: ulpevent does not fit in skb!\n", return 0);
612 /* Warning: The following hash functions assume a power of two 'size'. */
613 /* This is the hash function for the SCTP port hash table. */
614 static inline int sctp_phashfn(__u16 lport
)
616 return (lport
& (sctp_port_hashsize
- 1));
619 /* This is the hash function for the endpoint hash table. */
620 static inline int sctp_ep_hashfn(__u16 lport
)
622 return (lport
& (sctp_ep_hashsize
- 1));
625 /* This is the hash function for the association hash table. */
626 static inline int sctp_assoc_hashfn(__u16 lport
, __u16 rport
)
628 int h
= (lport
<< 16) + rport
;
630 return (h
& (sctp_assoc_hashsize
- 1));
633 /* This is the hash function for the association hash table. This is
634 * not used yet, but could be used as a better hash function when
637 static inline int sctp_vtag_hashfn(__u16 lport
, __u16 rport
, __u32 vtag
)
639 int h
= (lport
<< 16) + rport
;
641 return (h
& (sctp_assoc_hashsize
-1));
644 /* Is a socket of this style? */
645 #define sctp_style(sk, style) __sctp_style((sk), (SCTP_SOCKET_##style))
646 static inline int __sctp_style(const struct sock
*sk
, sctp_socket_type_t style
)
648 return sctp_sk(sk
)->type
== style
;
651 /* Is the association in this state? */
652 #define sctp_state(asoc, state) __sctp_state((asoc), (SCTP_STATE_##state))
653 static inline int __sctp_state(const struct sctp_association
*asoc
,
656 return asoc
->state
== state
;
659 /* Is the socket in this state? */
660 #define sctp_sstate(sk, state) __sctp_sstate((sk), (SCTP_SS_##state))
661 static inline int __sctp_sstate(const struct sock
*sk
, sctp_sock_state_t state
)
663 return sk
->sk_state
== state
;
666 /* Map v4-mapped v6 address back to v4 address */
667 static inline void sctp_v6_map_v4(union sctp_addr
*addr
)
669 addr
->v4
.sin_family
= AF_INET
;
670 addr
->v4
.sin_port
= addr
->v6
.sin6_port
;
671 addr
->v4
.sin_addr
.s_addr
= addr
->v6
.sin6_addr
.s6_addr32
[3];
674 /* Map v4 address to v4-mapped v6 address */
675 static inline void sctp_v4_map_v6(union sctp_addr
*addr
)
677 addr
->v6
.sin6_family
= AF_INET6
;
678 addr
->v6
.sin6_port
= addr
->v4
.sin_port
;
679 addr
->v6
.sin6_addr
.s6_addr32
[3] = addr
->v4
.sin_addr
.s_addr
;
680 addr
->v6
.sin6_addr
.s6_addr32
[0] = 0;
681 addr
->v6
.sin6_addr
.s6_addr32
[1] = 0;
682 addr
->v6
.sin6_addr
.s6_addr32
[2] = htonl(0x0000ffff);
685 #endif /* __net_sctp_h__ */