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49#ifndef __net_sctp_h__
50#define __net_sctp_h__
51
52
53
54
55
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57
58
59
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62
63
64
65#include <linux/types.h>
66#include <linux/slab.h>
67#include <linux/in.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>
73
74#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
75#include <net/ipv6.h>
76#include <net/ip6_route.h>
77#endif
78
79#include <asm/uaccess.h>
80#include <asm/page.h>
81#include <net/sock.h>
82#include <net/snmp.h>
83#include <net/sctp/structs.h>
84#include <net/sctp/constants.h>
85
86
87
88#ifndef SCTP_DEBUG
89#ifdef CONFIG_SCTP_DBG_MSG
90#define SCTP_DEBUG 1
91#else
92#define SCTP_DEBUG 0
93#endif
94#endif
95
96#ifdef CONFIG_IP_SCTP_MODULE
97#define SCTP_PROTOSW_FLAG 0
98#else
99#define SCTP_PROTOSW_FLAG INET_PROTOSW_PERMANENT
100#endif
101
102
103
104
105
106#ifndef SCTP_STATIC
107#define SCTP_STATIC static
108#endif
109
110
111
112
113
114
115
116
117extern struct sock *sctp_get_ctl_sock(void);
118extern void sctp_local_addr_free(struct rcu_head *head);
119extern int sctp_copy_local_addr_list(struct sctp_bind_addr *,
120 sctp_scope_t, gfp_t gfp,
121 int flags);
122extern struct sctp_pf *sctp_get_pf_specific(sa_family_t family);
123extern int sctp_register_pf(struct sctp_pf *, sa_family_t);
124
125
126
127
128int sctp_backlog_rcv(struct sock *sk, struct sk_buff *skb);
129int sctp_inet_listen(struct socket *sock, int backlog);
130void sctp_write_space(struct sock *sk);
131unsigned int sctp_poll(struct file *file, struct socket *sock,
132 poll_table *wait);
133void sctp_sock_rfree(struct sk_buff *skb);
134void sctp_copy_sock(struct sock *newsk, struct sock *sk,
135 struct sctp_association *asoc);
136extern struct percpu_counter sctp_sockets_allocated;
137
138
139
140
141int sctp_primitive_ASSOCIATE(struct sctp_association *, void *arg);
142int sctp_primitive_SHUTDOWN(struct sctp_association *, void *arg);
143int sctp_primitive_ABORT(struct sctp_association *, void *arg);
144int sctp_primitive_SEND(struct sctp_association *, void *arg);
145int sctp_primitive_REQUESTHEARTBEAT(struct sctp_association *, void *arg);
146int sctp_primitive_ASCONF(struct sctp_association *, void *arg);
147
148
149
150
151int sctp_rcv(struct sk_buff *skb);
152void sctp_v4_err(struct sk_buff *skb, u32 info);
153void sctp_hash_established(struct sctp_association *);
154void sctp_unhash_established(struct sctp_association *);
155void sctp_hash_endpoint(struct sctp_endpoint *);
156void sctp_unhash_endpoint(struct sctp_endpoint *);
157struct sock *sctp_err_lookup(int family, struct sk_buff *,
158 struct sctphdr *, struct sctp_association **,
159 struct sctp_transport **);
160void sctp_err_finish(struct sock *, struct sctp_association *);
161void sctp_icmp_frag_needed(struct sock *, struct sctp_association *,
162 struct sctp_transport *t, __u32 pmtu);
163void sctp_icmp_proto_unreachable(struct sock *sk,
164 struct sctp_association *asoc,
165 struct sctp_transport *t);
166void sctp_backlog_migrate(struct sctp_association *assoc,
167 struct sock *oldsk, struct sock *newsk);
168
169
170
171
172int sctp_snmp_proc_init(void);
173void sctp_snmp_proc_exit(void);
174int sctp_eps_proc_init(void);
175void sctp_eps_proc_exit(void);
176int sctp_assocs_proc_init(void);
177void sctp_assocs_proc_exit(void);
178int sctp_remaddr_proc_init(void);
179void sctp_remaddr_proc_exit(void);
180
181
182
183
184
185
186
187
188
189extern struct kmem_cache *sctp_chunk_cachep __read_mostly;
190extern struct kmem_cache *sctp_bucket_cachep __read_mostly;
191
192
193
194
195
196
197#ifdef TEST_FRAME
198#include <test_frame.h>
199#else
200
201
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)
213
214
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
220
221DECLARE_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)
226
227#endif
228
229
230enum
231{
232 SCTP_MIB_NUM = 0,
233 SCTP_MIB_CURRESTAB,
234 SCTP_MIB_ACTIVEESTABS,
235 SCTP_MIB_PASSIVEESTABS,
236 SCTP_MIB_ABORTEDS,
237 SCTP_MIB_SHUTDOWNS,
238 SCTP_MIB_OUTOFBLUES,
239 SCTP_MIB_CHECKSUMERRORS,
240 SCTP_MIB_OUTCTRLCHUNKS,
241 SCTP_MIB_OUTORDERCHUNKS,
242 SCTP_MIB_OUTUNORDERCHUNKS,
243 SCTP_MIB_INCTRLCHUNKS,
244 SCTP_MIB_INORDERCHUNKS,
245 SCTP_MIB_INUNORDERCHUNKS,
246 SCTP_MIB_FRAGUSRMSGS,
247 SCTP_MIB_REASMUSRMSGS,
248 SCTP_MIB_OUTSCTPPACKS,
249 SCTP_MIB_INSCTPPACKS,
250 SCTP_MIB_T1_INIT_EXPIREDS,
251 SCTP_MIB_T1_COOKIE_EXPIREDS,
252 SCTP_MIB_T2_SHUTDOWN_EXPIREDS,
253 SCTP_MIB_T3_RTX_EXPIREDS,
254 SCTP_MIB_T4_RTO_EXPIREDS,
255 SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS,
256 SCTP_MIB_DELAY_SACK_EXPIREDS,
257 SCTP_MIB_AUTOCLOSE_EXPIREDS,
258 SCTP_MIB_T1_RETRANSMITS,
259 SCTP_MIB_T3_RETRANSMITS,
260 SCTP_MIB_PMTUD_RETRANSMITS,
261 SCTP_MIB_FAST_RETRANSMITS,
262 SCTP_MIB_IN_PKT_SOFTIRQ,
263 SCTP_MIB_IN_PKT_BACKLOG,
264 SCTP_MIB_IN_PKT_DISCARDS,
265 SCTP_MIB_IN_DATA_CHUNK_DISCARDS,
266 __SCTP_MIB_MAX
267};
268
269#define SCTP_MIB_MAX __SCTP_MIB_MAX
270struct sctp_mib {
271 unsigned long mibs[SCTP_MIB_MAX];
272} __SNMP_MIB_ALIGN__;
273
274
275
276#if SCTP_DEBUG
277extern int sctp_debug_flag;
278#define SCTP_DEBUG_PRINTK(whatever...) \
279 ((void) (sctp_debug_flag && printk(KERN_DEBUG whatever)))
280#define SCTP_DEBUG_PRINTK_IPADDR(lead, trail, leadparm, saddr, otherparms...) \
281 if (sctp_debug_flag) { \
282 if (saddr->sa.sa_family == AF_INET6) { \
283 printk(KERN_DEBUG \
284 lead "%pI6" trail, \
285 leadparm, \
286 &saddr->v6.sin6_addr, \
287 otherparms); \
288 } else { \
289 printk(KERN_DEBUG \
290 lead "%pI4" trail, \
291 leadparm, \
292 &saddr->v4.sin_addr.s_addr, \
293 otherparms); \
294 } \
295 }
296#define SCTP_ENABLE_DEBUG { sctp_debug_flag = 1; }
297#define SCTP_DISABLE_DEBUG { sctp_debug_flag = 0; }
298
299#define SCTP_ASSERT(expr, str, func) \
300 if (!(expr)) { \
301 SCTP_DEBUG_PRINTK("Assertion Failed: %s(%s) at %s:%s:%d\n", \
302 str, (#expr), __FILE__, __func__, __LINE__); \
303 func; \
304 }
305
306#else
307
308#define SCTP_DEBUG_PRINTK(whatever...)
309#define SCTP_DEBUG_PRINTK_IPADDR(whatever...)
310#define SCTP_ENABLE_DEBUG
311#define SCTP_DISABLE_DEBUG
312#define SCTP_ASSERT(expr, str, func)
313
314#endif
315
316
317
318
319
320#ifdef CONFIG_SCTP_DBG_OBJCNT
321
322extern atomic_t sctp_dbg_objcnt_sock;
323extern atomic_t sctp_dbg_objcnt_ep;
324extern atomic_t sctp_dbg_objcnt_assoc;
325extern atomic_t sctp_dbg_objcnt_transport;
326extern atomic_t sctp_dbg_objcnt_chunk;
327extern atomic_t sctp_dbg_objcnt_bind_addr;
328extern atomic_t sctp_dbg_objcnt_bind_bucket;
329extern atomic_t sctp_dbg_objcnt_addr;
330extern atomic_t sctp_dbg_objcnt_ssnmap;
331extern atomic_t sctp_dbg_objcnt_datamsg;
332extern atomic_t sctp_dbg_objcnt_keys;
333
334
335#define SCTP_DBG_OBJCNT_INC(name) \
336atomic_inc(&sctp_dbg_objcnt_## name)
337#define SCTP_DBG_OBJCNT_DEC(name) \
338atomic_dec(&sctp_dbg_objcnt_## name)
339#define SCTP_DBG_OBJCNT(name) \
340atomic_t sctp_dbg_objcnt_## name = ATOMIC_INIT(0)
341
342
343
344
345#define SCTP_DBG_OBJCNT_ENTRY(name) \
346{.label= #name, .counter= &sctp_dbg_objcnt_## name}
347
348void sctp_dbg_objcnt_init(void);
349void sctp_dbg_objcnt_exit(void);
350
351#else
352
353#define SCTP_DBG_OBJCNT_INC(name)
354#define SCTP_DBG_OBJCNT_DEC(name)
355
356static inline void sctp_dbg_objcnt_init(void) { return; }
357static inline void sctp_dbg_objcnt_exit(void) { return; }
358
359#endif
360
361#if defined CONFIG_SYSCTL
362void sctp_sysctl_register(void);
363void sctp_sysctl_unregister(void);
364#else
365static inline void sctp_sysctl_register(void) { return; }
366static inline void sctp_sysctl_unregister(void) { return; }
367#endif
368
369
370#define SCTP_SAT_LEN(x) (sizeof(struct sctp_paramhdr) + (x) * sizeof(__u16))
371
372#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
373
374void sctp_v6_pf_init(void);
375void sctp_v6_pf_exit(void);
376int sctp_v6_protosw_init(void);
377void sctp_v6_protosw_exit(void);
378int sctp_v6_add_protocol(void);
379void sctp_v6_del_protocol(void);
380
381#else
382
383static inline void sctp_v6_pf_init(void) { return; }
384static inline void sctp_v6_pf_exit(void) { return; }
385static inline int sctp_v6_protosw_init(void) { return 0; }
386static inline void sctp_v6_protosw_exit(void) { return; }
387static inline int sctp_v6_add_protocol(void) { return 0; }
388static inline void sctp_v6_del_protocol(void) { return; }
389
390#endif
391
392
393
394static inline sctp_assoc_t sctp_assoc2id(const struct sctp_association *asoc)
395{
396 return (asoc?asoc->assoc_id:0);
397}
398
399
400struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id);
401
402
403
404#define sctp_skb_for_each(pos, head, tmp) \
405 skb_queue_walk_safe(head, pos, tmp)
406
407
408static inline void sctp_skb_list_tail(struct sk_buff_head *list,
409 struct sk_buff_head *head)
410{
411 unsigned long flags;
412
413 sctp_spin_lock_irqsave(&head->lock, flags);
414 sctp_spin_lock(&list->lock);
415
416 skb_queue_splice_tail_init(list, head);
417
418 sctp_spin_unlock(&list->lock);
419 sctp_spin_unlock_irqrestore(&head->lock, flags);
420}
421
422
423
424
425
426
427
428
429
430static inline struct list_head *sctp_list_dequeue(struct list_head *list)
431{
432 struct list_head *result = NULL;
433
434 if (list->next != list) {
435 result = list->next;
436 list->next = result->next;
437 list->next->prev = list;
438 INIT_LIST_HEAD(result);
439 }
440 return result;
441}
442
443
444
445
446
447static inline void sctp_skb_set_owner_r(struct sk_buff *skb, struct sock *sk)
448{
449 struct sctp_ulpevent *event = sctp_skb2event(skb);
450
451 skb_orphan(skb);
452 skb->sk = sk;
453 skb->destructor = sctp_sock_rfree;
454 atomic_add(event->rmem_len, &sk->sk_rmem_alloc);
455
456
457
458 sk->sk_forward_alloc -= event->rmem_len;
459}
460
461
462static inline int sctp_list_single_entry(struct list_head *head)
463{
464 return ((head->next != head) && (head->next == head->prev));
465}
466
467
468static inline __s32 sctp_jitter(__u32 rto)
469{
470 static __u32 sctp_rand;
471 __s32 ret;
472
473
474 if (!rto)
475 rto = 1;
476
477 sctp_rand += jiffies;
478 sctp_rand ^= (sctp_rand << 12);
479 sctp_rand ^= (sctp_rand >> 20);
480
481
482
483
484 ret = sctp_rand % rto - (rto >> 1);
485 return ret;
486}
487
488
489static inline int sctp_frag_point(const struct sctp_association *asoc, int pmtu)
490{
491 struct sctp_sock *sp = sctp_sk(asoc->base.sk);
492 int frag = pmtu;
493
494 frag -= sp->pf->af->net_header_len;
495 frag -= sizeof(struct sctphdr) + sizeof(struct sctp_data_chunk);
496
497 if (asoc->user_frag)
498 frag = min_t(int, frag, asoc->user_frag);
499
500 frag = min_t(int, frag, SCTP_MAX_CHUNK_LEN);
501
502 return frag;
503}
504
505static inline void sctp_assoc_pending_pmtu(struct sctp_association *asoc)
506{
507
508 sctp_assoc_sync_pmtu(asoc);
509 asoc->pmtu_pending = 0;
510}
511
512
513
514
515
516
517#define sctp_walk_params(pos, chunk, member)\
518_sctp_walk_params((pos), (chunk), ntohs((chunk)->chunk_hdr.length), member)
519
520#define _sctp_walk_params(pos, chunk, end, member)\
521for (pos.v = chunk->member;\
522 pos.v <= (void *)chunk + end - sizeof(sctp_paramhdr_t) &&\
523 pos.v <= (void *)chunk + end - ntohs(pos.p->length) &&\
524 ntohs(pos.p->length) >= sizeof(sctp_paramhdr_t);\
525 pos.v += WORD_ROUND(ntohs(pos.p->length)))
526
527#define sctp_walk_errors(err, chunk_hdr)\
528_sctp_walk_errors((err), (chunk_hdr), ntohs((chunk_hdr)->length))
529
530#define _sctp_walk_errors(err, chunk_hdr, end)\
531for (err = (sctp_errhdr_t *)((void *)chunk_hdr + \
532 sizeof(sctp_chunkhdr_t));\
533 (void *)err <= (void *)chunk_hdr + end - sizeof(sctp_errhdr_t) &&\
534 (void *)err <= (void *)chunk_hdr + end - ntohs(err->length) &&\
535 ntohs(err->length) >= sizeof(sctp_errhdr_t); \
536 err = (sctp_errhdr_t *)((void *)err + WORD_ROUND(ntohs(err->length))))
537
538#define sctp_walk_fwdtsn(pos, chunk)\
539_sctp_walk_fwdtsn((pos), (chunk), ntohs((chunk)->chunk_hdr->length) - sizeof(struct sctp_fwdtsn_chunk))
540
541#define _sctp_walk_fwdtsn(pos, chunk, end)\
542for (pos = chunk->subh.fwdtsn_hdr->skip;\
543 (void *)pos <= (void *)chunk->subh.fwdtsn_hdr->skip + end - sizeof(struct sctp_fwdtsn_skip);\
544 pos++)
545
546
547#define WORD_ROUND(s) (((s)+3)&~3)
548
549
550#define t_new(type, flags) (type *)kmalloc(sizeof(type), flags)
551
552
553#define tv_lt(s, t) \
554 (s.tv_sec < t.tv_sec || (s.tv_sec == t.tv_sec && s.tv_usec < t.tv_usec))
555
556
557#define TIMEVAL_ADD(tv1, tv2) \
558({ \
559 suseconds_t usecs = (tv2).tv_usec + (tv1).tv_usec; \
560 time_t secs = (tv2).tv_sec + (tv1).tv_sec; \
561\
562 if (usecs >= 1000000) { \
563 usecs -= 1000000; \
564 secs++; \
565 } \
566 (tv2).tv_sec = secs; \
567 (tv2).tv_usec = usecs; \
568})
569
570
571
572extern struct proto sctp_prot;
573extern struct proto sctpv6_prot;
574extern struct proc_dir_entry *proc_net_sctp;
575void sctp_put_port(struct sock *sk);
576
577extern struct idr sctp_assocs_id;
578extern spinlock_t sctp_assocs_id_lock;
579
580
581
582
583static inline int ipver2af(__u8 ipver)
584{
585 switch (ipver) {
586 case 4:
587 return AF_INET;
588 case 6:
589 return AF_INET6;
590 default:
591 return 0;
592 };
593}
594
595
596static inline int param_type2af(__be16 type)
597{
598 switch (type) {
599 case SCTP_PARAM_IPV4_ADDRESS:
600 return AF_INET;
601 case SCTP_PARAM_IPV6_ADDRESS:
602 return AF_INET6;
603 default:
604 return 0;
605 };
606}
607
608
609static inline int sctp_sanity_check(void)
610{
611 SCTP_ASSERT(sizeof(struct sctp_ulpevent) <=
612 sizeof(((struct sk_buff *)0)->cb),
613 "SCTP: ulpevent does not fit in skb!\n", return 0);
614
615 return 1;
616}
617
618
619
620static inline int sctp_phashfn(__u16 lport)
621{
622 return (lport & (sctp_port_hashsize - 1));
623}
624
625
626static inline int sctp_ep_hashfn(__u16 lport)
627{
628 return (lport & (sctp_ep_hashsize - 1));
629}
630
631
632static inline int sctp_assoc_hashfn(__u16 lport, __u16 rport)
633{
634 int h = (lport << 16) + rport;
635 h ^= h>>8;
636 return (h & (sctp_assoc_hashsize - 1));
637}
638
639
640
641
642
643static inline int sctp_vtag_hashfn(__u16 lport, __u16 rport, __u32 vtag)
644{
645 int h = (lport << 16) + rport;
646 h ^= vtag;
647 return (h & (sctp_assoc_hashsize-1));
648}
649
650#define sctp_for_each_hentry(epb, node, head) \
651 hlist_for_each_entry(epb, node, head, node)
652
653
654#define sctp_style(sk, style) __sctp_style((sk), (SCTP_SOCKET_##style))
655static inline int __sctp_style(const struct sock *sk, sctp_socket_type_t style)
656{
657 return sctp_sk(sk)->type == style;
658}
659
660
661#define sctp_state(asoc, state) __sctp_state((asoc), (SCTP_STATE_##state))
662static inline int __sctp_state(const struct sctp_association *asoc,
663 sctp_state_t state)
664{
665 return asoc->state == state;
666}
667
668
669#define sctp_sstate(sk, state) __sctp_sstate((sk), (SCTP_SS_##state))
670static inline int __sctp_sstate(const struct sock *sk, sctp_sock_state_t state)
671{
672 return sk->sk_state == state;
673}
674
675
676static inline void sctp_v6_map_v4(union sctp_addr *addr)
677{
678 addr->v4.sin_family = AF_INET;
679 addr->v4.sin_port = addr->v6.sin6_port;
680 addr->v4.sin_addr.s_addr = addr->v6.sin6_addr.s6_addr32[3];
681}
682
683
684static inline void sctp_v4_map_v6(union sctp_addr *addr)
685{
686 addr->v6.sin6_family = AF_INET6;
687 addr->v6.sin6_port = addr->v4.sin_port;
688 addr->v6.sin6_addr.s6_addr32[3] = addr->v4.sin_addr.s_addr;
689 addr->v6.sin6_addr.s6_addr32[0] = 0;
690 addr->v6.sin6_addr.s6_addr32[1] = 0;
691 addr->v6.sin6_addr.s6_addr32[2] = htonl(0x0000ffff);
692}
693
694#endif
695