1 /* SCTP kernel 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 implementation
9 * The base lksctp header.
11 * This SCTP 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 * This SCTP 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.
65 #include <linux/types.h>
66 #include <linux/slab.h>
68 #include <linux/tty.h>
69 #include <linux/proc_fs.h>
70 #include <linux/spinlock.h>
71 #include <linux/jiffies.h>
72 #include <linux/idr.h>
74 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
76 #include <net/ip6_route.h>
79 #include <asm/uaccess.h>
83 #include <net/sctp/structs.h>
84 #include <net/sctp/constants.h>
87 /* Set SCTP_DEBUG flag via config if not already set. */
89 #ifdef CONFIG_SCTP_DBG_MSG
93 #endif /* CONFIG_SCTP_DBG */
94 #endif /* SCTP_DEBUG */
96 #ifdef CONFIG_IP_SCTP_MODULE
97 #define SCTP_PROTOSW_FLAG 0
99 #define SCTP_PROTOSW_FLAG INET_PROTOSW_PERMANENT
103 /* Certain internal static functions need to be exported when
104 * compiled into the test frame.
107 #define SCTP_STATIC static
111 * Function declarations.
117 extern struct sock
*sctp_get_ctl_sock(void);
118 extern int sctp_copy_local_addr_list(struct sctp_bind_addr
*,
119 sctp_scope_t
, gfp_t gfp
,
121 extern struct sctp_pf
*sctp_get_pf_specific(sa_family_t family
);
122 extern int sctp_register_pf(struct sctp_pf
*, sa_family_t
);
127 int sctp_backlog_rcv(struct sock
*sk
, struct sk_buff
*skb
);
128 int sctp_inet_listen(struct socket
*sock
, int backlog
);
129 void sctp_write_space(struct sock
*sk
);
130 void sctp_data_ready(struct sock
*sk
, int len
);
131 unsigned int sctp_poll(struct file
*file
, struct socket
*sock
,
133 void sctp_sock_rfree(struct sk_buff
*skb
);
134 void sctp_copy_sock(struct sock
*newsk
, struct sock
*sk
,
135 struct sctp_association
*asoc
);
136 extern struct percpu_counter sctp_sockets_allocated
;
141 int sctp_primitive_ASSOCIATE(struct sctp_association
*, void *arg
);
142 int sctp_primitive_SHUTDOWN(struct sctp_association
*, void *arg
);
143 int sctp_primitive_ABORT(struct sctp_association
*, void *arg
);
144 int sctp_primitive_SEND(struct sctp_association
*, void *arg
);
145 int sctp_primitive_REQUESTHEARTBEAT(struct sctp_association
*, void *arg
);
146 int sctp_primitive_ASCONF(struct sctp_association
*, void *arg
);
151 int sctp_rcv(struct sk_buff
*skb
);
152 void sctp_v4_err(struct sk_buff
*skb
, u32 info
);
153 void sctp_hash_established(struct sctp_association
*);
154 void sctp_unhash_established(struct sctp_association
*);
155 void sctp_hash_endpoint(struct sctp_endpoint
*);
156 void sctp_unhash_endpoint(struct sctp_endpoint
*);
157 struct sock
*sctp_err_lookup(int family
, struct sk_buff
*,
158 struct sctphdr
*, struct sctp_association
**,
159 struct sctp_transport
**);
160 void sctp_err_finish(struct sock
*, struct sctp_association
*);
161 void sctp_icmp_frag_needed(struct sock
*, struct sctp_association
*,
162 struct sctp_transport
*t
, __u32 pmtu
);
163 void sctp_icmp_proto_unreachable(struct sock
*sk
,
164 struct sctp_association
*asoc
,
165 struct sctp_transport
*t
);
166 void sctp_backlog_migrate(struct sctp_association
*assoc
,
167 struct sock
*oldsk
, struct sock
*newsk
);
172 int sctp_snmp_proc_init(void);
173 void sctp_snmp_proc_exit(void);
174 int sctp_eps_proc_init(void);
175 void sctp_eps_proc_exit(void);
176 int sctp_assocs_proc_init(void);
177 void sctp_assocs_proc_exit(void);
178 int sctp_remaddr_proc_init(void);
179 void sctp_remaddr_proc_exit(void);
183 * Module global variables
189 extern struct kmem_cache
*sctp_chunk_cachep __read_mostly
;
190 extern struct kmem_cache
*sctp_bucket_cachep __read_mostly
;
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)
220 /* SCTP SNMP MIB stats handlers */
221 DECLARE_SNMP_STAT(struct sctp_mib
, sctp_statistics
);
222 #define SCTP_INC_STATS(field) SNMP_INC_STATS(sctp_statistics, field)
223 #define SCTP_INC_STATS_BH(field) SNMP_INC_STATS_BH(sctp_statistics, field)
224 #define SCTP_INC_STATS_USER(field) SNMP_INC_STATS_USER(sctp_statistics, field)
225 #define SCTP_DEC_STATS(field) SNMP_DEC_STATS(sctp_statistics, field)
227 #endif /* !TEST_FRAME */
229 /* sctp mib definitions */
232 SCTP_MIB_CURRESTAB
, /* CurrEstab */
233 SCTP_MIB_ACTIVEESTABS
, /* ActiveEstabs */
234 SCTP_MIB_PASSIVEESTABS
, /* PassiveEstabs */
235 SCTP_MIB_ABORTEDS
, /* Aborteds */
236 SCTP_MIB_SHUTDOWNS
, /* Shutdowns */
237 SCTP_MIB_OUTOFBLUES
, /* OutOfBlues */
238 SCTP_MIB_CHECKSUMERRORS
, /* ChecksumErrors */
239 SCTP_MIB_OUTCTRLCHUNKS
, /* OutCtrlChunks */
240 SCTP_MIB_OUTORDERCHUNKS
, /* OutOrderChunks */
241 SCTP_MIB_OUTUNORDERCHUNKS
, /* OutUnorderChunks */
242 SCTP_MIB_INCTRLCHUNKS
, /* InCtrlChunks */
243 SCTP_MIB_INORDERCHUNKS
, /* InOrderChunks */
244 SCTP_MIB_INUNORDERCHUNKS
, /* InUnorderChunks */
245 SCTP_MIB_FRAGUSRMSGS
, /* FragUsrMsgs */
246 SCTP_MIB_REASMUSRMSGS
, /* ReasmUsrMsgs */
247 SCTP_MIB_OUTSCTPPACKS
, /* OutSCTPPacks */
248 SCTP_MIB_INSCTPPACKS
, /* InSCTPPacks */
249 SCTP_MIB_T1_INIT_EXPIREDS
,
250 SCTP_MIB_T1_COOKIE_EXPIREDS
,
251 SCTP_MIB_T2_SHUTDOWN_EXPIREDS
,
252 SCTP_MIB_T3_RTX_EXPIREDS
,
253 SCTP_MIB_T4_RTO_EXPIREDS
,
254 SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS
,
255 SCTP_MIB_DELAY_SACK_EXPIREDS
,
256 SCTP_MIB_AUTOCLOSE_EXPIREDS
,
257 SCTP_MIB_T1_RETRANSMITS
,
258 SCTP_MIB_T3_RETRANSMITS
,
259 SCTP_MIB_PMTUD_RETRANSMITS
,
260 SCTP_MIB_FAST_RETRANSMITS
,
261 SCTP_MIB_IN_PKT_SOFTIRQ
,
262 SCTP_MIB_IN_PKT_BACKLOG
,
263 SCTP_MIB_IN_PKT_DISCARDS
,
264 SCTP_MIB_IN_DATA_CHUNK_DISCARDS
,
268 #define SCTP_MIB_MAX __SCTP_MIB_MAX
270 unsigned long mibs
[SCTP_MIB_MAX
];
274 /* Print debugging messages. */
276 extern int sctp_debug_flag
;
277 #define SCTP_DEBUG_PRINTK(fmt, args...) \
279 if (sctp_debug_flag) \
280 printk(KERN_DEBUG pr_fmt(fmt), ##args); \
282 #define SCTP_DEBUG_PRINTK_CONT(fmt, args...) \
284 if (sctp_debug_flag) \
285 pr_cont(fmt, ##args); \
287 #define SCTP_DEBUG_PRINTK_IPADDR(fmt_lead, fmt_trail, \
288 args_lead, saddr, args_trail...) \
290 if (sctp_debug_flag) { \
291 if (saddr->sa.sa_family == AF_INET6) { \
293 pr_fmt(fmt_lead "%pI6" fmt_trail), \
295 &saddr->v6.sin6_addr, \
299 pr_fmt(fmt_lead "%pI4" fmt_trail), \
301 &saddr->v4.sin_addr.s_addr, \
306 #define SCTP_ENABLE_DEBUG { sctp_debug_flag = 1; }
307 #define SCTP_DISABLE_DEBUG { sctp_debug_flag = 0; }
309 #define SCTP_ASSERT(expr, str, func) \
311 SCTP_DEBUG_PRINTK("Assertion Failed: %s(%s) at %s:%s:%d\n", \
312 str, (#expr), __FILE__, __func__, __LINE__); \
316 #else /* SCTP_DEBUG */
318 #define SCTP_DEBUG_PRINTK(whatever...)
319 #define SCTP_DEBUG_PRINTK_CONT(fmt, args...)
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
;
343 extern atomic_t sctp_dbg_objcnt_keys
;
345 /* Macros to atomically increment/decrement objcnt counters. */
346 #define SCTP_DBG_OBJCNT_INC(name) \
347 atomic_inc(&sctp_dbg_objcnt_## name)
348 #define SCTP_DBG_OBJCNT_DEC(name) \
349 atomic_dec(&sctp_dbg_objcnt_## name)
350 #define SCTP_DBG_OBJCNT(name) \
351 atomic_t sctp_dbg_objcnt_## name = ATOMIC_INIT(0)
353 /* Macro to help create new entries in in the global array of
356 #define SCTP_DBG_OBJCNT_ENTRY(name) \
357 {.label= #name, .counter= &sctp_dbg_objcnt_## name}
359 void sctp_dbg_objcnt_init(void);
360 void sctp_dbg_objcnt_exit(void);
364 #define SCTP_DBG_OBJCNT_INC(name)
365 #define SCTP_DBG_OBJCNT_DEC(name)
367 static inline void sctp_dbg_objcnt_init(void) { return; }
368 static inline void sctp_dbg_objcnt_exit(void) { return; }
370 #endif /* CONFIG_SCTP_DBG_OBJCOUNT */
372 #if defined CONFIG_SYSCTL
373 void sctp_sysctl_register(void);
374 void sctp_sysctl_unregister(void);
376 static inline void sctp_sysctl_register(void) { return; }
377 static inline void sctp_sysctl_unregister(void) { return; }
380 /* Size of Supported Address Parameter for 'x' address types. */
381 #define SCTP_SAT_LEN(x) (sizeof(struct sctp_paramhdr) + (x) * sizeof(__u16))
383 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
385 void sctp_v6_pf_init(void);
386 void sctp_v6_pf_exit(void);
387 int sctp_v6_protosw_init(void);
388 void sctp_v6_protosw_exit(void);
389 int sctp_v6_add_protocol(void);
390 void sctp_v6_del_protocol(void);
392 #else /* #ifdef defined(CONFIG_IPV6) */
394 static inline void sctp_v6_pf_init(void) { return; }
395 static inline void sctp_v6_pf_exit(void) { return; }
396 static inline int sctp_v6_protosw_init(void) { return 0; }
397 static inline void sctp_v6_protosw_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 skb_queue_walk_safe(head, pos, tmp)
418 /* A helper to append an entire skb list (list) to another (head). */
419 static inline void sctp_skb_list_tail(struct sk_buff_head
*list
,
420 struct sk_buff_head
*head
)
424 sctp_spin_lock_irqsave(&head
->lock
, flags
);
425 sctp_spin_lock(&list
->lock
);
427 skb_queue_splice_tail_init(list
, head
);
429 sctp_spin_unlock(&list
->lock
);
430 sctp_spin_unlock_irqrestore(&head
->lock
, flags
);
434 * sctp_list_dequeue - remove from the head of the queue
435 * @list: list to dequeue from
437 * Remove the head of the list. The head item is
438 * returned or %NULL if the list is empty.
441 static inline struct list_head
*sctp_list_dequeue(struct list_head
*list
)
443 struct list_head
*result
= NULL
;
445 if (list
->next
!= list
) {
447 list
->next
= result
->next
;
448 list
->next
->prev
= list
;
449 INIT_LIST_HEAD(result
);
454 /* SCTP version of skb_set_owner_r. We need this one because
455 * of the way we have to do receive buffer accounting on bundled
458 static inline void sctp_skb_set_owner_r(struct sk_buff
*skb
, struct sock
*sk
)
460 struct sctp_ulpevent
*event
= sctp_skb2event(skb
);
464 skb
->destructor
= sctp_sock_rfree
;
465 atomic_add(event
->rmem_len
, &sk
->sk_rmem_alloc
);
467 * This mimics the behavior of skb_set_owner_r
469 sk
->sk_forward_alloc
-= event
->rmem_len
;
472 /* Tests if the list has one and only one entry. */
473 static inline int sctp_list_single_entry(struct list_head
*head
)
475 return (head
->next
!= head
) && (head
->next
== head
->prev
);
478 /* Generate a random jitter in the range of -50% ~ +50% of input RTO. */
479 static inline __s32
sctp_jitter(__u32 rto
)
481 static __u32 sctp_rand
;
484 /* Avoid divide by zero. */
488 sctp_rand
+= jiffies
;
489 sctp_rand
^= (sctp_rand
<< 12);
490 sctp_rand
^= (sctp_rand
>> 20);
492 /* Choose random number from 0 to rto, then move to -50% ~ +50%
495 ret
= sctp_rand
% rto
- (rto
>> 1);
499 /* Break down data chunks at this point. */
500 static inline int sctp_frag_point(const struct sctp_association
*asoc
, int pmtu
)
502 struct sctp_sock
*sp
= sctp_sk(asoc
->base
.sk
);
505 frag
-= sp
->pf
->af
->net_header_len
;
506 frag
-= sizeof(struct sctphdr
) + sizeof(struct sctp_data_chunk
);
509 frag
= min_t(int, frag
, asoc
->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 - ntohs(pos.p->length) &&\
534 ntohs(pos.p->length) >= sizeof(sctp_paramhdr_t);\
535 pos.v += WORD_ROUND(ntohs(pos.p->length)))
537 #define sctp_walk_errors(err, chunk_hdr)\
538 _sctp_walk_errors((err), (chunk_hdr), ntohs((chunk_hdr)->length))
540 #define _sctp_walk_errors(err, chunk_hdr, end)\
541 for (err = (sctp_errhdr_t *)((void *)chunk_hdr + \
542 sizeof(sctp_chunkhdr_t));\
543 (void *)err <= (void *)chunk_hdr + end - ntohs(err->length) &&\
544 ntohs(err->length) >= sizeof(sctp_errhdr_t); \
545 err = (sctp_errhdr_t *)((void *)err + WORD_ROUND(ntohs(err->length))))
547 #define sctp_walk_fwdtsn(pos, chunk)\
548 _sctp_walk_fwdtsn((pos), (chunk), ntohs((chunk)->chunk_hdr->length) - sizeof(struct sctp_fwdtsn_chunk))
550 #define _sctp_walk_fwdtsn(pos, chunk, end)\
551 for (pos = chunk->subh.fwdtsn_hdr->skip;\
552 (void *)pos <= (void *)chunk->subh.fwdtsn_hdr->skip + end - sizeof(struct sctp_fwdtsn_skip);\
555 /* Round an int up to the next multiple of 4. */
556 #define WORD_ROUND(s) (((s)+3)&~3)
558 /* Make a new instance of type. */
559 #define t_new(type, flags) (type *)kzalloc(sizeof(type), flags)
561 /* Compare two timevals. */
562 #define tv_lt(s, t) \
563 (s.tv_sec < t.tv_sec || (s.tv_sec == t.tv_sec && s.tv_usec < t.tv_usec))
565 /* Add tv1 to tv2. */
566 #define TIMEVAL_ADD(tv1, tv2) \
568 suseconds_t usecs = (tv2).tv_usec + (tv1).tv_usec; \
569 time_t secs = (tv2).tv_sec + (tv1).tv_sec; \
571 if (usecs >= 1000000) { \
575 (tv2).tv_sec = secs; \
576 (tv2).tv_usec = usecs; \
579 /* External references. */
581 extern struct proto sctp_prot
;
582 extern struct proto sctpv6_prot
;
583 extern struct proc_dir_entry
*proc_net_sctp
;
584 void sctp_put_port(struct sock
*sk
);
586 extern struct idr sctp_assocs_id
;
587 extern spinlock_t sctp_assocs_id_lock
;
589 /* Static inline functions. */
591 /* Convert from an IP version number to an Address Family symbol. */
592 static inline int ipver2af(__u8 ipver
)
604 /* Convert from an address parameter type to an address family. */
605 static inline int param_type2af(__be16 type
)
608 case SCTP_PARAM_IPV4_ADDRESS
:
610 case SCTP_PARAM_IPV6_ADDRESS
:
617 /* Perform some sanity checks. */
618 static inline int sctp_sanity_check(void)
620 SCTP_ASSERT(sizeof(struct sctp_ulpevent
) <=
621 sizeof(((struct sk_buff
*)0)->cb
),
622 "SCTP: ulpevent does not fit in skb!\n", return 0);
627 /* Warning: The following hash functions assume a power of two 'size'. */
628 /* This is the hash function for the SCTP port hash table. */
629 static inline int sctp_phashfn(__u16 lport
)
631 return lport
& (sctp_port_hashsize
- 1);
634 /* This is the hash function for the endpoint hash table. */
635 static inline int sctp_ep_hashfn(__u16 lport
)
637 return lport
& (sctp_ep_hashsize
- 1);
640 /* This is the hash function for the association hash table. */
641 static inline int sctp_assoc_hashfn(__u16 lport
, __u16 rport
)
643 int h
= (lport
<< 16) + rport
;
645 return h
& (sctp_assoc_hashsize
- 1);
648 /* This is the hash function for the association hash table. This is
649 * not used yet, but could be used as a better hash function when
652 static inline int sctp_vtag_hashfn(__u16 lport
, __u16 rport
, __u32 vtag
)
654 int h
= (lport
<< 16) + rport
;
656 return h
& (sctp_assoc_hashsize
- 1);
659 #define sctp_for_each_hentry(epb, node, head) \
660 hlist_for_each_entry(epb, node, head, node)
662 /* Is a socket of this style? */
663 #define sctp_style(sk, style) __sctp_style((sk), (SCTP_SOCKET_##style))
664 static inline int __sctp_style(const struct sock
*sk
, sctp_socket_type_t style
)
666 return sctp_sk(sk
)->type
== style
;
669 /* Is the association in this state? */
670 #define sctp_state(asoc, state) __sctp_state((asoc), (SCTP_STATE_##state))
671 static inline int __sctp_state(const struct sctp_association
*asoc
,
674 return asoc
->state
== state
;
677 /* Is the socket in this state? */
678 #define sctp_sstate(sk, state) __sctp_sstate((sk), (SCTP_SS_##state))
679 static inline int __sctp_sstate(const struct sock
*sk
, sctp_sock_state_t state
)
681 return sk
->sk_state
== state
;
684 /* Map v4-mapped v6 address back to v4 address */
685 static inline void sctp_v6_map_v4(union sctp_addr
*addr
)
687 addr
->v4
.sin_family
= AF_INET
;
688 addr
->v4
.sin_port
= addr
->v6
.sin6_port
;
689 addr
->v4
.sin_addr
.s_addr
= addr
->v6
.sin6_addr
.s6_addr32
[3];
692 /* Map v4 address to v4-mapped v6 address */
693 static inline void sctp_v4_map_v6(union sctp_addr
*addr
)
695 addr
->v6
.sin6_family
= AF_INET6
;
696 addr
->v6
.sin6_port
= addr
->v4
.sin_port
;
697 addr
->v6
.sin6_addr
.s6_addr32
[3] = addr
->v4
.sin_addr
.s_addr
;
698 addr
->v6
.sin6_addr
.s6_addr32
[0] = 0;
699 addr
->v6
.sin6_addr
.s6_addr32
[1] = 0;
700 addr
->v6
.sin6_addr
.s6_addr32
[2] = htonl(0x0000ffff);
703 #endif /* __net_sctp_h__ */