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26
27#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
28
29#include <linux/module.h>
30#include <linux/init.h>
31#include <linux/netdevice.h>
32#include <linux/inetdevice.h>
33#include <linux/seq_file.h>
34#include <linux/memblock.h>
35#include <linux/highmem.h>
36#include <linux/swap.h>
37#include <linux/slab.h>
38#include <net/net_namespace.h>
39#include <net/protocol.h>
40#include <net/ip.h>
41#include <net/ipv6.h>
42#include <net/route.h>
43#include <net/sctp/sctp.h>
44#include <net/addrconf.h>
45#include <net/inet_common.h>
46#include <net/inet_ecn.h>
47
48#define MAX_SCTP_PORT_HASH_ENTRIES (64 * 1024)
49
50
51struct sctp_globals sctp_globals __read_mostly;
52
53struct idr sctp_assocs_id;
54DEFINE_SPINLOCK(sctp_assocs_id_lock);
55
56static struct sctp_pf *sctp_pf_inet6_specific;
57static struct sctp_pf *sctp_pf_inet_specific;
58static struct sctp_af *sctp_af_v4_specific;
59static struct sctp_af *sctp_af_v6_specific;
60
61struct kmem_cache *sctp_chunk_cachep __read_mostly;
62struct kmem_cache *sctp_bucket_cachep __read_mostly;
63
64long sysctl_sctp_mem[3];
65int sysctl_sctp_rmem[3];
66int sysctl_sctp_wmem[3];
67
68
69
70
71static void sctp_v4_copy_addrlist(struct list_head *addrlist,
72 struct net_device *dev)
73{
74 struct in_device *in_dev;
75 struct in_ifaddr *ifa;
76 struct sctp_sockaddr_entry *addr;
77
78 rcu_read_lock();
79 if ((in_dev = __in_dev_get_rcu(dev)) == NULL) {
80 rcu_read_unlock();
81 return;
82 }
83
84 in_dev_for_each_ifa_rcu(ifa, in_dev) {
85
86 addr = kzalloc(sizeof(*addr), GFP_ATOMIC);
87 if (addr) {
88 addr->a.v4.sin_family = AF_INET;
89 addr->a.v4.sin_addr.s_addr = ifa->ifa_local;
90 addr->valid = 1;
91 INIT_LIST_HEAD(&addr->list);
92 list_add_tail(&addr->list, addrlist);
93 }
94 }
95
96 rcu_read_unlock();
97}
98
99
100
101
102static void sctp_get_local_addr_list(struct net *net)
103{
104 struct net_device *dev;
105 struct list_head *pos;
106 struct sctp_af *af;
107
108 rcu_read_lock();
109 for_each_netdev_rcu(net, dev) {
110 list_for_each(pos, &sctp_address_families) {
111 af = list_entry(pos, struct sctp_af, list);
112 af->copy_addrlist(&net->sctp.local_addr_list, dev);
113 }
114 }
115 rcu_read_unlock();
116}
117
118
119static void sctp_free_local_addr_list(struct net *net)
120{
121 struct sctp_sockaddr_entry *addr;
122 struct list_head *pos, *temp;
123
124 list_for_each_safe(pos, temp, &net->sctp.local_addr_list) {
125 addr = list_entry(pos, struct sctp_sockaddr_entry, list);
126 list_del(pos);
127 kfree(addr);
128 }
129}
130
131
132int sctp_copy_local_addr_list(struct net *net, struct sctp_bind_addr *bp,
133 enum sctp_scope scope, gfp_t gfp, int copy_flags)
134{
135 struct sctp_sockaddr_entry *addr;
136 union sctp_addr laddr;
137 int error = 0;
138
139 rcu_read_lock();
140 list_for_each_entry_rcu(addr, &net->sctp.local_addr_list, list) {
141 if (!addr->valid)
142 continue;
143 if (!sctp_in_scope(net, &addr->a, scope))
144 continue;
145
146
147
148
149
150 if (addr->a.sa.sa_family == AF_INET &&
151 !(copy_flags & SCTP_ADDR4_PEERSUPP))
152 continue;
153 if (addr->a.sa.sa_family == AF_INET6 &&
154 (!(copy_flags & SCTP_ADDR6_ALLOWED) ||
155 !(copy_flags & SCTP_ADDR6_PEERSUPP)))
156 continue;
157
158 laddr = addr->a;
159
160 laddr.v4.sin_port = htons(bp->port);
161 if (sctp_bind_addr_state(bp, &laddr) != -1)
162 continue;
163
164 error = sctp_add_bind_addr(bp, &addr->a, sizeof(addr->a),
165 SCTP_ADDR_SRC, GFP_ATOMIC);
166 if (error)
167 break;
168 }
169
170 rcu_read_unlock();
171 return error;
172}
173
174
175static void sctp_v4_copy_ip_options(struct sock *sk, struct sock *newsk)
176{
177 struct inet_sock *newinet, *inet = inet_sk(sk);
178 struct ip_options_rcu *inet_opt, *newopt = NULL;
179
180 newinet = inet_sk(newsk);
181
182 rcu_read_lock();
183 inet_opt = rcu_dereference(inet->inet_opt);
184 if (inet_opt) {
185 newopt = sock_kmalloc(newsk, sizeof(*inet_opt) +
186 inet_opt->opt.optlen, GFP_ATOMIC);
187 if (newopt)
188 memcpy(newopt, inet_opt, sizeof(*inet_opt) +
189 inet_opt->opt.optlen);
190 else
191 pr_err("%s: Failed to copy ip options\n", __func__);
192 }
193 RCU_INIT_POINTER(newinet->inet_opt, newopt);
194 rcu_read_unlock();
195}
196
197
198static int sctp_v4_ip_options_len(struct sock *sk)
199{
200 struct inet_sock *inet = inet_sk(sk);
201 struct ip_options_rcu *inet_opt;
202 int len = 0;
203
204 rcu_read_lock();
205 inet_opt = rcu_dereference(inet->inet_opt);
206 if (inet_opt)
207 len = inet_opt->opt.optlen;
208
209 rcu_read_unlock();
210 return len;
211}
212
213
214static void sctp_v4_from_skb(union sctp_addr *addr, struct sk_buff *skb,
215 int is_saddr)
216{
217
218 struct sctphdr *sh = sctp_hdr(skb);
219 struct sockaddr_in *sa = &addr->v4;
220
221 addr->v4.sin_family = AF_INET;
222
223 if (is_saddr) {
224 sa->sin_port = sh->source;
225 sa->sin_addr.s_addr = ip_hdr(skb)->saddr;
226 } else {
227 sa->sin_port = sh->dest;
228 sa->sin_addr.s_addr = ip_hdr(skb)->daddr;
229 }
230 memset(sa->sin_zero, 0, sizeof(sa->sin_zero));
231}
232
233
234static void sctp_v4_from_sk(union sctp_addr *addr, struct sock *sk)
235{
236 addr->v4.sin_family = AF_INET;
237 addr->v4.sin_port = 0;
238 addr->v4.sin_addr.s_addr = inet_sk(sk)->inet_rcv_saddr;
239 memset(addr->v4.sin_zero, 0, sizeof(addr->v4.sin_zero));
240}
241
242
243static void sctp_v4_to_sk_saddr(union sctp_addr *addr, struct sock *sk)
244{
245 inet_sk(sk)->inet_rcv_saddr = addr->v4.sin_addr.s_addr;
246}
247
248
249static void sctp_v4_to_sk_daddr(union sctp_addr *addr, struct sock *sk)
250{
251 inet_sk(sk)->inet_daddr = addr->v4.sin_addr.s_addr;
252}
253
254
255static void sctp_v4_from_addr_param(union sctp_addr *addr,
256 union sctp_addr_param *param,
257 __be16 port, int iif)
258{
259 addr->v4.sin_family = AF_INET;
260 addr->v4.sin_port = port;
261 addr->v4.sin_addr.s_addr = param->v4.addr.s_addr;
262 memset(addr->v4.sin_zero, 0, sizeof(addr->v4.sin_zero));
263}
264
265
266
267
268static int sctp_v4_to_addr_param(const union sctp_addr *addr,
269 union sctp_addr_param *param)
270{
271 int length = sizeof(struct sctp_ipv4addr_param);
272
273 param->v4.param_hdr.type = SCTP_PARAM_IPV4_ADDRESS;
274 param->v4.param_hdr.length = htons(length);
275 param->v4.addr.s_addr = addr->v4.sin_addr.s_addr;
276
277 return length;
278}
279
280
281static void sctp_v4_dst_saddr(union sctp_addr *saddr, struct flowi4 *fl4,
282 __be16 port)
283{
284 saddr->v4.sin_family = AF_INET;
285 saddr->v4.sin_port = port;
286 saddr->v4.sin_addr.s_addr = fl4->saddr;
287 memset(saddr->v4.sin_zero, 0, sizeof(saddr->v4.sin_zero));
288}
289
290
291static int sctp_v4_cmp_addr(const union sctp_addr *addr1,
292 const union sctp_addr *addr2)
293{
294 if (addr1->sa.sa_family != addr2->sa.sa_family)
295 return 0;
296 if (addr1->v4.sin_port != addr2->v4.sin_port)
297 return 0;
298 if (addr1->v4.sin_addr.s_addr != addr2->v4.sin_addr.s_addr)
299 return 0;
300
301 return 1;
302}
303
304
305static void sctp_v4_inaddr_any(union sctp_addr *addr, __be16 port)
306{
307 addr->v4.sin_family = AF_INET;
308 addr->v4.sin_addr.s_addr = htonl(INADDR_ANY);
309 addr->v4.sin_port = port;
310 memset(addr->v4.sin_zero, 0, sizeof(addr->v4.sin_zero));
311}
312
313
314static int sctp_v4_is_any(const union sctp_addr *addr)
315{
316 return htonl(INADDR_ANY) == addr->v4.sin_addr.s_addr;
317}
318
319
320
321
322
323
324
325
326static int sctp_v4_addr_valid(union sctp_addr *addr,
327 struct sctp_sock *sp,
328 const struct sk_buff *skb)
329{
330
331 if (sp && ipv6_only_sock(sctp_opt2sk(sp)))
332 return 0;
333
334
335 if (IS_IPV4_UNUSABLE_ADDRESS(addr->v4.sin_addr.s_addr))
336 return 0;
337
338
339 if (skb && skb_rtable(skb)->rt_flags & RTCF_BROADCAST)
340 return 0;
341
342 return 1;
343}
344
345
346static int sctp_v4_available(union sctp_addr *addr, struct sctp_sock *sp)
347{
348 struct net *net = sock_net(&sp->inet.sk);
349 int ret = inet_addr_type(net, addr->v4.sin_addr.s_addr);
350
351
352 if (addr->v4.sin_addr.s_addr != htonl(INADDR_ANY) &&
353 ret != RTN_LOCAL &&
354 !sp->inet.freebind &&
355 !net->ipv4.sysctl_ip_nonlocal_bind)
356 return 0;
357
358 if (ipv6_only_sock(sctp_opt2sk(sp)))
359 return 0;
360
361 return 1;
362}
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381static enum sctp_scope sctp_v4_scope(union sctp_addr *addr)
382{
383 enum sctp_scope retval;
384
385
386 if (IS_IPV4_UNUSABLE_ADDRESS(addr->v4.sin_addr.s_addr)) {
387 retval = SCTP_SCOPE_UNUSABLE;
388 } else if (ipv4_is_loopback(addr->v4.sin_addr.s_addr)) {
389 retval = SCTP_SCOPE_LOOPBACK;
390 } else if (ipv4_is_linklocal_169(addr->v4.sin_addr.s_addr)) {
391 retval = SCTP_SCOPE_LINK;
392 } else if (ipv4_is_private_10(addr->v4.sin_addr.s_addr) ||
393 ipv4_is_private_172(addr->v4.sin_addr.s_addr) ||
394 ipv4_is_private_192(addr->v4.sin_addr.s_addr)) {
395 retval = SCTP_SCOPE_PRIVATE;
396 } else {
397 retval = SCTP_SCOPE_GLOBAL;
398 }
399
400 return retval;
401}
402
403
404
405
406
407static void sctp_v4_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
408 struct flowi *fl, struct sock *sk)
409{
410 struct sctp_association *asoc = t->asoc;
411 struct rtable *rt;
412 struct flowi _fl;
413 struct flowi4 *fl4 = &_fl.u.ip4;
414 struct sctp_bind_addr *bp;
415 struct sctp_sockaddr_entry *laddr;
416 struct dst_entry *dst = NULL;
417 union sctp_addr *daddr = &t->ipaddr;
418 union sctp_addr dst_saddr;
419 __u8 tos = inet_sk(sk)->tos;
420
421 if (t->dscp & SCTP_DSCP_SET_MASK)
422 tos = t->dscp & SCTP_DSCP_VAL_MASK;
423 memset(&_fl, 0x0, sizeof(_fl));
424 fl4->daddr = daddr->v4.sin_addr.s_addr;
425 fl4->fl4_dport = daddr->v4.sin_port;
426 fl4->flowi4_proto = IPPROTO_SCTP;
427 if (asoc) {
428 fl4->flowi4_tos = RT_CONN_FLAGS_TOS(asoc->base.sk, tos);
429 fl4->flowi4_oif = asoc->base.sk->sk_bound_dev_if;
430 fl4->fl4_sport = htons(asoc->base.bind_addr.port);
431 }
432 if (saddr) {
433 fl4->saddr = saddr->v4.sin_addr.s_addr;
434 if (!fl4->fl4_sport)
435 fl4->fl4_sport = saddr->v4.sin_port;
436 }
437
438 pr_debug("%s: dst:%pI4, src:%pI4 - ", __func__, &fl4->daddr,
439 &fl4->saddr);
440
441 rt = ip_route_output_key(sock_net(sk), fl4);
442 if (!IS_ERR(rt)) {
443 dst = &rt->dst;
444 t->dst = dst;
445 memcpy(fl, &_fl, sizeof(_fl));
446 }
447
448
449
450
451 if (!asoc || saddr)
452 goto out;
453
454 bp = &asoc->base.bind_addr;
455
456 if (dst) {
457
458
459
460 sctp_v4_dst_saddr(&dst_saddr, fl4, htons(bp->port));
461 rcu_read_lock();
462 list_for_each_entry_rcu(laddr, &bp->address_list, list) {
463 if (!laddr->valid || (laddr->state == SCTP_ADDR_DEL) ||
464 (laddr->state != SCTP_ADDR_SRC &&
465 !asoc->src_out_of_asoc_ok))
466 continue;
467 if (sctp_v4_cmp_addr(&dst_saddr, &laddr->a))
468 goto out_unlock;
469 }
470 rcu_read_unlock();
471
472
473
474
475 dst_release(dst);
476 dst = NULL;
477 }
478
479
480
481
482 rcu_read_lock();
483 list_for_each_entry_rcu(laddr, &bp->address_list, list) {
484 struct net_device *odev;
485
486 if (!laddr->valid)
487 continue;
488 if (laddr->state != SCTP_ADDR_SRC ||
489 AF_INET != laddr->a.sa.sa_family)
490 continue;
491
492 fl4->fl4_sport = laddr->a.v4.sin_port;
493 flowi4_update_output(fl4,
494 asoc->base.sk->sk_bound_dev_if,
495 RT_CONN_FLAGS_TOS(asoc->base.sk, tos),
496 daddr->v4.sin_addr.s_addr,
497 laddr->a.v4.sin_addr.s_addr);
498
499 rt = ip_route_output_key(sock_net(sk), fl4);
500 if (IS_ERR(rt))
501 continue;
502
503
504
505
506 odev = __ip_dev_find(sock_net(sk), laddr->a.v4.sin_addr.s_addr,
507 false);
508 if (!odev || odev->ifindex != fl4->flowi4_oif) {
509 if (!dst) {
510 dst = &rt->dst;
511 t->dst = dst;
512 memcpy(fl, &_fl, sizeof(_fl));
513 } else {
514 dst_release(&rt->dst);
515 }
516 continue;
517 }
518
519 dst_release(dst);
520 dst = &rt->dst;
521 t->dst = dst;
522 memcpy(fl, &_fl, sizeof(_fl));
523 break;
524 }
525
526out_unlock:
527 rcu_read_unlock();
528out:
529 if (dst) {
530 pr_debug("rt_dst:%pI4, rt_src:%pI4\n",
531 &fl->u.ip4.daddr, &fl->u.ip4.saddr);
532 } else {
533 t->dst = NULL;
534 pr_debug("no route\n");
535 }
536}
537
538
539
540
541static void sctp_v4_get_saddr(struct sctp_sock *sk,
542 struct sctp_transport *t,
543 struct flowi *fl)
544{
545 union sctp_addr *saddr = &t->saddr;
546 struct rtable *rt = (struct rtable *)t->dst;
547
548 if (rt) {
549 saddr->v4.sin_family = AF_INET;
550 saddr->v4.sin_addr.s_addr = fl->u.ip4.saddr;
551 }
552}
553
554
555static int sctp_v4_skb_iif(const struct sk_buff *skb)
556{
557 return inet_iif(skb);
558}
559
560
561static int sctp_v4_is_ce(const struct sk_buff *skb)
562{
563 return INET_ECN_is_ce(ip_hdr(skb)->tos);
564}
565
566
567static struct sock *sctp_v4_create_accept_sk(struct sock *sk,
568 struct sctp_association *asoc,
569 bool kern)
570{
571 struct sock *newsk = sk_alloc(sock_net(sk), PF_INET, GFP_KERNEL,
572 sk->sk_prot, kern);
573 struct inet_sock *newinet;
574
575 if (!newsk)
576 goto out;
577
578 sock_init_data(NULL, newsk);
579
580 sctp_copy_sock(newsk, sk, asoc);
581 sock_reset_flag(newsk, SOCK_ZAPPED);
582
583 sctp_v4_copy_ip_options(sk, newsk);
584
585 newinet = inet_sk(newsk);
586
587 newinet->inet_daddr = asoc->peer.primary_addr.v4.sin_addr.s_addr;
588
589 sk_refcnt_debug_inc(newsk);
590
591 if (newsk->sk_prot->init(newsk)) {
592 sk_common_release(newsk);
593 newsk = NULL;
594 }
595
596out:
597 return newsk;
598}
599
600static int sctp_v4_addr_to_user(struct sctp_sock *sp, union sctp_addr *addr)
601{
602
603 memset(addr->v4.sin_zero, 0, sizeof(addr->v4.sin_zero));
604 return sizeof(struct sockaddr_in);
605}
606
607
608static void sctp_v4_seq_dump_addr(struct seq_file *seq, union sctp_addr *addr)
609{
610 seq_printf(seq, "%pI4 ", &addr->v4.sin_addr);
611}
612
613static void sctp_v4_ecn_capable(struct sock *sk)
614{
615 INET_ECN_xmit(sk);
616}
617
618static void sctp_addr_wq_timeout_handler(struct timer_list *t)
619{
620 struct net *net = from_timer(net, t, sctp.addr_wq_timer);
621 struct sctp_sockaddr_entry *addrw, *temp;
622 struct sctp_sock *sp;
623
624 spin_lock_bh(&net->sctp.addr_wq_lock);
625
626 list_for_each_entry_safe(addrw, temp, &net->sctp.addr_waitq, list) {
627 pr_debug("%s: the first ent in wq:%p is addr:%pISc for cmd:%d at "
628 "entry:%p\n", __func__, &net->sctp.addr_waitq, &addrw->a.sa,
629 addrw->state, addrw);
630
631#if IS_ENABLED(CONFIG_IPV6)
632
633
634 if (addrw->a.sa.sa_family == AF_INET6) {
635 struct in6_addr *in6;
636
637 if (ipv6_addr_type(&addrw->a.v6.sin6_addr) &
638 IPV6_ADDR_LINKLOCAL)
639 goto free_next;
640
641 in6 = (struct in6_addr *)&addrw->a.v6.sin6_addr;
642 if (ipv6_chk_addr(net, in6, NULL, 0) == 0 &&
643 addrw->state == SCTP_ADDR_NEW) {
644 unsigned long timeo_val;
645
646 pr_debug("%s: this is on DAD, trying %d sec "
647 "later\n", __func__,
648 SCTP_ADDRESS_TICK_DELAY);
649
650 timeo_val = jiffies;
651 timeo_val += msecs_to_jiffies(SCTP_ADDRESS_TICK_DELAY);
652 mod_timer(&net->sctp.addr_wq_timer, timeo_val);
653 break;
654 }
655 }
656#endif
657 list_for_each_entry(sp, &net->sctp.auto_asconf_splist, auto_asconf_list) {
658 struct sock *sk;
659
660 sk = sctp_opt2sk(sp);
661
662 if (!sctp_is_ep_boundall(sk))
663 continue;
664 bh_lock_sock(sk);
665 if (sctp_asconf_mgmt(sp, addrw) < 0)
666 pr_debug("%s: sctp_asconf_mgmt failed\n", __func__);
667 bh_unlock_sock(sk);
668 }
669#if IS_ENABLED(CONFIG_IPV6)
670free_next:
671#endif
672 list_del(&addrw->list);
673 kfree(addrw);
674 }
675 spin_unlock_bh(&net->sctp.addr_wq_lock);
676}
677
678static void sctp_free_addr_wq(struct net *net)
679{
680 struct sctp_sockaddr_entry *addrw;
681 struct sctp_sockaddr_entry *temp;
682
683 spin_lock_bh(&net->sctp.addr_wq_lock);
684 del_timer(&net->sctp.addr_wq_timer);
685 list_for_each_entry_safe(addrw, temp, &net->sctp.addr_waitq, list) {
686 list_del(&addrw->list);
687 kfree(addrw);
688 }
689 spin_unlock_bh(&net->sctp.addr_wq_lock);
690}
691
692
693
694
695static struct sctp_sockaddr_entry *sctp_addr_wq_lookup(struct net *net,
696 struct sctp_sockaddr_entry *addr)
697{
698 struct sctp_sockaddr_entry *addrw;
699
700 list_for_each_entry(addrw, &net->sctp.addr_waitq, list) {
701 if (addrw->a.sa.sa_family != addr->a.sa.sa_family)
702 continue;
703 if (addrw->a.sa.sa_family == AF_INET) {
704 if (addrw->a.v4.sin_addr.s_addr ==
705 addr->a.v4.sin_addr.s_addr)
706 return addrw;
707 } else if (addrw->a.sa.sa_family == AF_INET6) {
708 if (ipv6_addr_equal(&addrw->a.v6.sin6_addr,
709 &addr->a.v6.sin6_addr))
710 return addrw;
711 }
712 }
713 return NULL;
714}
715
716void sctp_addr_wq_mgmt(struct net *net, struct sctp_sockaddr_entry *addr, int cmd)
717{
718 struct sctp_sockaddr_entry *addrw;
719 unsigned long timeo_val;
720
721
722
723
724
725
726
727 spin_lock_bh(&net->sctp.addr_wq_lock);
728
729 addrw = sctp_addr_wq_lookup(net, addr);
730 if (addrw) {
731 if (addrw->state != cmd) {
732 pr_debug("%s: offsets existing entry for %d, addr:%pISc "
733 "in wq:%p\n", __func__, addrw->state, &addrw->a.sa,
734 &net->sctp.addr_waitq);
735
736 list_del(&addrw->list);
737 kfree(addrw);
738 }
739 spin_unlock_bh(&net->sctp.addr_wq_lock);
740 return;
741 }
742
743
744 addrw = kmemdup(addr, sizeof(struct sctp_sockaddr_entry), GFP_ATOMIC);
745 if (addrw == NULL) {
746 spin_unlock_bh(&net->sctp.addr_wq_lock);
747 return;
748 }
749 addrw->state = cmd;
750 list_add_tail(&addrw->list, &net->sctp.addr_waitq);
751
752 pr_debug("%s: add new entry for cmd:%d, addr:%pISc in wq:%p\n",
753 __func__, addrw->state, &addrw->a.sa, &net->sctp.addr_waitq);
754
755 if (!timer_pending(&net->sctp.addr_wq_timer)) {
756 timeo_val = jiffies;
757 timeo_val += msecs_to_jiffies(SCTP_ADDRESS_TICK_DELAY);
758 mod_timer(&net->sctp.addr_wq_timer, timeo_val);
759 }
760 spin_unlock_bh(&net->sctp.addr_wq_lock);
761}
762
763
764
765
766
767
768
769static int sctp_inetaddr_event(struct notifier_block *this, unsigned long ev,
770 void *ptr)
771{
772 struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
773 struct sctp_sockaddr_entry *addr = NULL;
774 struct sctp_sockaddr_entry *temp;
775 struct net *net = dev_net(ifa->ifa_dev->dev);
776 int found = 0;
777
778 switch (ev) {
779 case NETDEV_UP:
780 addr = kzalloc(sizeof(*addr), GFP_ATOMIC);
781 if (addr) {
782 addr->a.v4.sin_family = AF_INET;
783 addr->a.v4.sin_addr.s_addr = ifa->ifa_local;
784 addr->valid = 1;
785 spin_lock_bh(&net->sctp.local_addr_lock);
786 list_add_tail_rcu(&addr->list, &net->sctp.local_addr_list);
787 sctp_addr_wq_mgmt(net, addr, SCTP_ADDR_NEW);
788 spin_unlock_bh(&net->sctp.local_addr_lock);
789 }
790 break;
791 case NETDEV_DOWN:
792 spin_lock_bh(&net->sctp.local_addr_lock);
793 list_for_each_entry_safe(addr, temp,
794 &net->sctp.local_addr_list, list) {
795 if (addr->a.sa.sa_family == AF_INET &&
796 addr->a.v4.sin_addr.s_addr ==
797 ifa->ifa_local) {
798 sctp_addr_wq_mgmt(net, addr, SCTP_ADDR_DEL);
799 found = 1;
800 addr->valid = 0;
801 list_del_rcu(&addr->list);
802 break;
803 }
804 }
805 spin_unlock_bh(&net->sctp.local_addr_lock);
806 if (found)
807 kfree_rcu(addr, rcu);
808 break;
809 }
810
811 return NOTIFY_DONE;
812}
813
814
815
816
817
818static int sctp_ctl_sock_init(struct net *net)
819{
820 int err;
821 sa_family_t family = PF_INET;
822
823 if (sctp_get_pf_specific(PF_INET6))
824 family = PF_INET6;
825
826 err = inet_ctl_sock_create(&net->sctp.ctl_sock, family,
827 SOCK_SEQPACKET, IPPROTO_SCTP, net);
828
829
830 if (err < 0 && family == PF_INET6)
831 err = inet_ctl_sock_create(&net->sctp.ctl_sock, AF_INET,
832 SOCK_SEQPACKET, IPPROTO_SCTP,
833 net);
834
835 if (err < 0) {
836 pr_err("Failed to create the SCTP control socket\n");
837 return err;
838 }
839 return 0;
840}
841
842
843int sctp_register_af(struct sctp_af *af)
844{
845 switch (af->sa_family) {
846 case AF_INET:
847 if (sctp_af_v4_specific)
848 return 0;
849 sctp_af_v4_specific = af;
850 break;
851 case AF_INET6:
852 if (sctp_af_v6_specific)
853 return 0;
854 sctp_af_v6_specific = af;
855 break;
856 default:
857 return 0;
858 }
859
860 INIT_LIST_HEAD(&af->list);
861 list_add_tail(&af->list, &sctp_address_families);
862 return 1;
863}
864
865
866
867
868struct sctp_af *sctp_get_af_specific(sa_family_t family)
869{
870 switch (family) {
871 case AF_INET:
872 return sctp_af_v4_specific;
873 case AF_INET6:
874 return sctp_af_v6_specific;
875 default:
876 return NULL;
877 }
878}
879
880
881static void sctp_inet_msgname(char *msgname, int *addr_len)
882{
883 struct sockaddr_in *sin;
884
885 sin = (struct sockaddr_in *)msgname;
886 *addr_len = sizeof(struct sockaddr_in);
887 sin->sin_family = AF_INET;
888 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
889}
890
891
892static void sctp_inet_event_msgname(struct sctp_ulpevent *event, char *msgname,
893 int *addr_len)
894{
895 struct sockaddr_in *sin, *sinfrom;
896
897 if (msgname) {
898 struct sctp_association *asoc;
899
900 asoc = event->asoc;
901 sctp_inet_msgname(msgname, addr_len);
902 sin = (struct sockaddr_in *)msgname;
903 sinfrom = &asoc->peer.primary_addr.v4;
904 sin->sin_port = htons(asoc->peer.port);
905 sin->sin_addr.s_addr = sinfrom->sin_addr.s_addr;
906 }
907}
908
909
910static void sctp_inet_skb_msgname(struct sk_buff *skb, char *msgname, int *len)
911{
912 if (msgname) {
913 struct sctphdr *sh = sctp_hdr(skb);
914 struct sockaddr_in *sin = (struct sockaddr_in *)msgname;
915
916 sctp_inet_msgname(msgname, len);
917 sin->sin_port = sh->source;
918 sin->sin_addr.s_addr = ip_hdr(skb)->saddr;
919 }
920}
921
922
923static int sctp_inet_af_supported(sa_family_t family, struct sctp_sock *sp)
924{
925
926 return AF_INET == family;
927}
928
929
930static int sctp_inet_cmp_addr(const union sctp_addr *addr1,
931 const union sctp_addr *addr2,
932 struct sctp_sock *opt)
933{
934
935 if (addr1->sa.sa_family != addr2->sa.sa_family)
936 return 0;
937 if (htonl(INADDR_ANY) == addr1->v4.sin_addr.s_addr ||
938 htonl(INADDR_ANY) == addr2->v4.sin_addr.s_addr)
939 return 1;
940 if (addr1->v4.sin_addr.s_addr == addr2->v4.sin_addr.s_addr)
941 return 1;
942
943 return 0;
944}
945
946
947
948
949static int sctp_inet_bind_verify(struct sctp_sock *opt, union sctp_addr *addr)
950{
951 return sctp_v4_available(addr, opt);
952}
953
954
955
956
957static int sctp_inet_send_verify(struct sctp_sock *opt, union sctp_addr *addr)
958{
959 return 1;
960}
961
962
963
964
965static int sctp_inet_supported_addrs(const struct sctp_sock *opt,
966 __be16 *types)
967{
968 types[0] = SCTP_PARAM_IPV4_ADDRESS;
969 return 1;
970}
971
972
973static inline int sctp_v4_xmit(struct sk_buff *skb,
974 struct sctp_transport *transport)
975{
976 struct inet_sock *inet = inet_sk(skb->sk);
977 __u8 dscp = inet->tos;
978
979 pr_debug("%s: skb:%p, len:%d, src:%pI4, dst:%pI4\n", __func__, skb,
980 skb->len, &transport->fl.u.ip4.saddr,
981 &transport->fl.u.ip4.daddr);
982
983 if (transport->dscp & SCTP_DSCP_SET_MASK)
984 dscp = transport->dscp & SCTP_DSCP_VAL_MASK;
985
986 inet->pmtudisc = transport->param_flags & SPP_PMTUD_ENABLE ?
987 IP_PMTUDISC_DO : IP_PMTUDISC_DONT;
988
989 SCTP_INC_STATS(sock_net(&inet->sk), SCTP_MIB_OUTSCTPPACKS);
990
991 return __ip_queue_xmit(&inet->sk, skb, &transport->fl, dscp);
992}
993
994static struct sctp_af sctp_af_inet;
995
996static struct sctp_pf sctp_pf_inet = {
997 .event_msgname = sctp_inet_event_msgname,
998 .skb_msgname = sctp_inet_skb_msgname,
999 .af_supported = sctp_inet_af_supported,
1000 .cmp_addr = sctp_inet_cmp_addr,
1001 .bind_verify = sctp_inet_bind_verify,
1002 .send_verify = sctp_inet_send_verify,
1003 .supported_addrs = sctp_inet_supported_addrs,
1004 .create_accept_sk = sctp_v4_create_accept_sk,
1005 .addr_to_user = sctp_v4_addr_to_user,
1006 .to_sk_saddr = sctp_v4_to_sk_saddr,
1007 .to_sk_daddr = sctp_v4_to_sk_daddr,
1008 .copy_ip_options = sctp_v4_copy_ip_options,
1009 .af = &sctp_af_inet
1010};
1011
1012
1013static struct notifier_block sctp_inetaddr_notifier = {
1014 .notifier_call = sctp_inetaddr_event,
1015};
1016
1017
1018static const struct proto_ops inet_seqpacket_ops = {
1019 .family = PF_INET,
1020 .owner = THIS_MODULE,
1021 .release = inet_release,
1022 .bind = inet_bind,
1023 .connect = sctp_inet_connect,
1024 .socketpair = sock_no_socketpair,
1025 .accept = inet_accept,
1026 .getname = inet_getname,
1027 .poll = sctp_poll,
1028 .ioctl = inet_ioctl,
1029 .gettstamp = sock_gettstamp,
1030 .listen = sctp_inet_listen,
1031 .shutdown = inet_shutdown,
1032 .setsockopt = sock_common_setsockopt,
1033 .getsockopt = sock_common_getsockopt,
1034 .sendmsg = inet_sendmsg,
1035 .recvmsg = inet_recvmsg,
1036 .mmap = sock_no_mmap,
1037 .sendpage = sock_no_sendpage,
1038#ifdef CONFIG_COMPAT
1039 .compat_setsockopt = compat_sock_common_setsockopt,
1040 .compat_getsockopt = compat_sock_common_getsockopt,
1041#endif
1042};
1043
1044
1045static struct inet_protosw sctp_seqpacket_protosw = {
1046 .type = SOCK_SEQPACKET,
1047 .protocol = IPPROTO_SCTP,
1048 .prot = &sctp_prot,
1049 .ops = &inet_seqpacket_ops,
1050 .flags = SCTP_PROTOSW_FLAG
1051};
1052static struct inet_protosw sctp_stream_protosw = {
1053 .type = SOCK_STREAM,
1054 .protocol = IPPROTO_SCTP,
1055 .prot = &sctp_prot,
1056 .ops = &inet_seqpacket_ops,
1057 .flags = SCTP_PROTOSW_FLAG
1058};
1059
1060
1061static const struct net_protocol sctp_protocol = {
1062 .handler = sctp_rcv,
1063 .err_handler = sctp_v4_err,
1064 .no_policy = 1,
1065 .netns_ok = 1,
1066 .icmp_strict_tag_validation = 1,
1067};
1068
1069
1070static struct sctp_af sctp_af_inet = {
1071 .sa_family = AF_INET,
1072 .sctp_xmit = sctp_v4_xmit,
1073 .setsockopt = ip_setsockopt,
1074 .getsockopt = ip_getsockopt,
1075 .get_dst = sctp_v4_get_dst,
1076 .get_saddr = sctp_v4_get_saddr,
1077 .copy_addrlist = sctp_v4_copy_addrlist,
1078 .from_skb = sctp_v4_from_skb,
1079 .from_sk = sctp_v4_from_sk,
1080 .from_addr_param = sctp_v4_from_addr_param,
1081 .to_addr_param = sctp_v4_to_addr_param,
1082 .cmp_addr = sctp_v4_cmp_addr,
1083 .addr_valid = sctp_v4_addr_valid,
1084 .inaddr_any = sctp_v4_inaddr_any,
1085 .is_any = sctp_v4_is_any,
1086 .available = sctp_v4_available,
1087 .scope = sctp_v4_scope,
1088 .skb_iif = sctp_v4_skb_iif,
1089 .is_ce = sctp_v4_is_ce,
1090 .seq_dump_addr = sctp_v4_seq_dump_addr,
1091 .ecn_capable = sctp_v4_ecn_capable,
1092 .net_header_len = sizeof(struct iphdr),
1093 .sockaddr_len = sizeof(struct sockaddr_in),
1094 .ip_options_len = sctp_v4_ip_options_len,
1095#ifdef CONFIG_COMPAT
1096 .compat_setsockopt = compat_ip_setsockopt,
1097 .compat_getsockopt = compat_ip_getsockopt,
1098#endif
1099};
1100
1101struct sctp_pf *sctp_get_pf_specific(sa_family_t family)
1102{
1103 switch (family) {
1104 case PF_INET:
1105 return sctp_pf_inet_specific;
1106 case PF_INET6:
1107 return sctp_pf_inet6_specific;
1108 default:
1109 return NULL;
1110 }
1111}
1112
1113
1114int sctp_register_pf(struct sctp_pf *pf, sa_family_t family)
1115{
1116 switch (family) {
1117 case PF_INET:
1118 if (sctp_pf_inet_specific)
1119 return 0;
1120 sctp_pf_inet_specific = pf;
1121 break;
1122 case PF_INET6:
1123 if (sctp_pf_inet6_specific)
1124 return 0;
1125 sctp_pf_inet6_specific = pf;
1126 break;
1127 default:
1128 return 0;
1129 }
1130 return 1;
1131}
1132
1133static inline int init_sctp_mibs(struct net *net)
1134{
1135 net->sctp.sctp_statistics = alloc_percpu(struct sctp_mib);
1136 if (!net->sctp.sctp_statistics)
1137 return -ENOMEM;
1138 return 0;
1139}
1140
1141static inline void cleanup_sctp_mibs(struct net *net)
1142{
1143 free_percpu(net->sctp.sctp_statistics);
1144}
1145
1146static void sctp_v4_pf_init(void)
1147{
1148
1149 sctp_register_pf(&sctp_pf_inet, PF_INET);
1150 sctp_register_af(&sctp_af_inet);
1151}
1152
1153static void sctp_v4_pf_exit(void)
1154{
1155 list_del(&sctp_af_inet.list);
1156}
1157
1158static int sctp_v4_protosw_init(void)
1159{
1160 int rc;
1161
1162 rc = proto_register(&sctp_prot, 1);
1163 if (rc)
1164 return rc;
1165
1166
1167 inet_register_protosw(&sctp_seqpacket_protosw);
1168 inet_register_protosw(&sctp_stream_protosw);
1169
1170 return 0;
1171}
1172
1173static void sctp_v4_protosw_exit(void)
1174{
1175 inet_unregister_protosw(&sctp_stream_protosw);
1176 inet_unregister_protosw(&sctp_seqpacket_protosw);
1177 proto_unregister(&sctp_prot);
1178}
1179
1180static int sctp_v4_add_protocol(void)
1181{
1182
1183 register_inetaddr_notifier(&sctp_inetaddr_notifier);
1184
1185
1186 if (inet_add_protocol(&sctp_protocol, IPPROTO_SCTP) < 0)
1187 return -EAGAIN;
1188
1189 return 0;
1190}
1191
1192static void sctp_v4_del_protocol(void)
1193{
1194 inet_del_protocol(&sctp_protocol, IPPROTO_SCTP);
1195 unregister_inetaddr_notifier(&sctp_inetaddr_notifier);
1196}
1197
1198static int __net_init sctp_defaults_init(struct net *net)
1199{
1200 int status;
1201
1202
1203
1204
1205
1206
1207 net->sctp.rto_initial = SCTP_RTO_INITIAL;
1208
1209 net->sctp.rto_min = SCTP_RTO_MIN;
1210
1211 net->sctp.rto_max = SCTP_RTO_MAX;
1212
1213 net->sctp.rto_alpha = SCTP_RTO_ALPHA;
1214
1215 net->sctp.rto_beta = SCTP_RTO_BETA;
1216
1217
1218 net->sctp.valid_cookie_life = SCTP_DEFAULT_COOKIE_LIFE;
1219
1220
1221 net->sctp.cookie_preserve_enable = 1;
1222
1223
1224#if defined (CONFIG_SCTP_DEFAULT_COOKIE_HMAC_MD5)
1225 net->sctp.sctp_hmac_alg = "md5";
1226#elif defined (CONFIG_SCTP_DEFAULT_COOKIE_HMAC_SHA1)
1227 net->sctp.sctp_hmac_alg = "sha1";
1228#else
1229 net->sctp.sctp_hmac_alg = NULL;
1230#endif
1231
1232
1233 net->sctp.max_burst = SCTP_DEFAULT_MAX_BURST;
1234
1235
1236 net->sctp.ps_retrans = SCTP_PS_RETRANS_MAX;
1237
1238
1239 net->sctp.pf_enable = 1;
1240
1241
1242 net->sctp.pf_expose = SCTP_PF_EXPOSE_UNSET;
1243
1244
1245
1246
1247
1248 net->sctp.max_retrans_association = 10;
1249 net->sctp.max_retrans_path = 5;
1250 net->sctp.max_retrans_init = 8;
1251
1252
1253 net->sctp.sndbuf_policy = 0;
1254
1255
1256 net->sctp.rcvbuf_policy = 0;
1257
1258
1259 net->sctp.hb_interval = SCTP_DEFAULT_TIMEOUT_HEARTBEAT;
1260
1261
1262 net->sctp.sack_timeout = SCTP_DEFAULT_TIMEOUT_SACK;
1263
1264
1265 net->sctp.addip_enable = 0;
1266 net->sctp.addip_noauth = 0;
1267 net->sctp.default_auto_asconf = 0;
1268
1269
1270 net->sctp.prsctp_enable = 1;
1271
1272
1273 net->sctp.reconf_enable = 0;
1274
1275
1276 net->sctp.auth_enable = 0;
1277
1278
1279 net->sctp.ecn_enable = 1;
1280
1281
1282 net->sctp.scope_policy = SCTP_SCOPE_POLICY_ENABLE;
1283
1284
1285 net->sctp.rwnd_upd_shift = SCTP_DEFAULT_RWND_SHIFT;
1286
1287
1288 net->sctp.max_autoclose = INT_MAX / HZ;
1289
1290 status = sctp_sysctl_net_register(net);
1291 if (status)
1292 goto err_sysctl_register;
1293
1294
1295 status = init_sctp_mibs(net);
1296 if (status)
1297 goto err_init_mibs;
1298
1299#ifdef CONFIG_PROC_FS
1300
1301 status = sctp_proc_init(net);
1302 if (status)
1303 goto err_init_proc;
1304#endif
1305
1306 sctp_dbg_objcnt_init(net);
1307
1308
1309 INIT_LIST_HEAD(&net->sctp.local_addr_list);
1310 spin_lock_init(&net->sctp.local_addr_lock);
1311 sctp_get_local_addr_list(net);
1312
1313
1314 INIT_LIST_HEAD(&net->sctp.addr_waitq);
1315 INIT_LIST_HEAD(&net->sctp.auto_asconf_splist);
1316 spin_lock_init(&net->sctp.addr_wq_lock);
1317 net->sctp.addr_wq_timer.expires = 0;
1318 timer_setup(&net->sctp.addr_wq_timer, sctp_addr_wq_timeout_handler, 0);
1319
1320 return 0;
1321
1322#ifdef CONFIG_PROC_FS
1323err_init_proc:
1324 cleanup_sctp_mibs(net);
1325#endif
1326err_init_mibs:
1327 sctp_sysctl_net_unregister(net);
1328err_sysctl_register:
1329 return status;
1330}
1331
1332static void __net_exit sctp_defaults_exit(struct net *net)
1333{
1334
1335 sctp_free_addr_wq(net);
1336 sctp_free_local_addr_list(net);
1337
1338#ifdef CONFIG_PROC_FS
1339 remove_proc_subtree("sctp", net->proc_net);
1340 net->sctp.proc_net_sctp = NULL;
1341#endif
1342 cleanup_sctp_mibs(net);
1343 sctp_sysctl_net_unregister(net);
1344}
1345
1346static struct pernet_operations sctp_defaults_ops = {
1347 .init = sctp_defaults_init,
1348 .exit = sctp_defaults_exit,
1349};
1350
1351static int __net_init sctp_ctrlsock_init(struct net *net)
1352{
1353 int status;
1354
1355
1356 status = sctp_ctl_sock_init(net);
1357 if (status)
1358 pr_err("Failed to initialize the SCTP control sock\n");
1359
1360 return status;
1361}
1362
1363static void __net_exit sctp_ctrlsock_exit(struct net *net)
1364{
1365
1366 inet_ctl_sock_destroy(net->sctp.ctl_sock);
1367}
1368
1369static struct pernet_operations sctp_ctrlsock_ops = {
1370 .init = sctp_ctrlsock_init,
1371 .exit = sctp_ctrlsock_exit,
1372};
1373
1374
1375static __init int sctp_init(void)
1376{
1377 int i;
1378 int status = -EINVAL;
1379 unsigned long goal;
1380 unsigned long limit;
1381 unsigned long nr_pages = totalram_pages();
1382 int max_share;
1383 int order;
1384 int num_entries;
1385 int max_entry_order;
1386
1387 sock_skb_cb_check_size(sizeof(struct sctp_ulpevent));
1388
1389
1390 status = -ENOBUFS;
1391 sctp_bucket_cachep = kmem_cache_create("sctp_bind_bucket",
1392 sizeof(struct sctp_bind_bucket),
1393 0, SLAB_HWCACHE_ALIGN,
1394 NULL);
1395 if (!sctp_bucket_cachep)
1396 goto out;
1397
1398 sctp_chunk_cachep = kmem_cache_create("sctp_chunk",
1399 sizeof(struct sctp_chunk),
1400 0, SLAB_HWCACHE_ALIGN,
1401 NULL);
1402 if (!sctp_chunk_cachep)
1403 goto err_chunk_cachep;
1404
1405 status = percpu_counter_init(&sctp_sockets_allocated, 0, GFP_KERNEL);
1406 if (status)
1407 goto err_percpu_counter_init;
1408
1409
1410
1411
1412 sctp_max_instreams = SCTP_DEFAULT_INSTREAMS;
1413 sctp_max_outstreams = SCTP_DEFAULT_OUTSTREAMS;
1414
1415
1416 idr_init(&sctp_assocs_id);
1417
1418 limit = nr_free_buffer_pages() / 8;
1419 limit = max(limit, 128UL);
1420 sysctl_sctp_mem[0] = limit / 4 * 3;
1421 sysctl_sctp_mem[1] = limit;
1422 sysctl_sctp_mem[2] = sysctl_sctp_mem[0] * 2;
1423
1424
1425 limit = (sysctl_sctp_mem[1]) << (PAGE_SHIFT - 7);
1426 max_share = min(4UL*1024*1024, limit);
1427
1428 sysctl_sctp_rmem[0] = SK_MEM_QUANTUM;
1429 sysctl_sctp_rmem[1] = 1500 * SKB_TRUESIZE(1);
1430 sysctl_sctp_rmem[2] = max(sysctl_sctp_rmem[1], max_share);
1431
1432 sysctl_sctp_wmem[0] = SK_MEM_QUANTUM;
1433 sysctl_sctp_wmem[1] = 16*1024;
1434 sysctl_sctp_wmem[2] = max(64*1024, max_share);
1435
1436
1437
1438
1439
1440 if (nr_pages >= (128 * 1024))
1441 goal = nr_pages >> (22 - PAGE_SHIFT);
1442 else
1443 goal = nr_pages >> (24 - PAGE_SHIFT);
1444
1445
1446 order = get_order(goal);
1447
1448
1449
1450
1451 max_entry_order = get_order(MAX_SCTP_PORT_HASH_ENTRIES *
1452 sizeof(struct sctp_bind_hashbucket));
1453
1454
1455 order = min(order, max_entry_order);
1456
1457
1458 sctp_ep_hashsize = 64;
1459 sctp_ep_hashtable =
1460 kmalloc_array(64, sizeof(struct sctp_hashbucket), GFP_KERNEL);
1461 if (!sctp_ep_hashtable) {
1462 pr_err("Failed endpoint_hash alloc\n");
1463 status = -ENOMEM;
1464 goto err_ehash_alloc;
1465 }
1466 for (i = 0; i < sctp_ep_hashsize; i++) {
1467 rwlock_init(&sctp_ep_hashtable[i].lock);
1468 INIT_HLIST_HEAD(&sctp_ep_hashtable[i].chain);
1469 }
1470
1471
1472
1473
1474
1475
1476 do {
1477 sctp_port_hashtable = (struct sctp_bind_hashbucket *)
1478 __get_free_pages(GFP_KERNEL | __GFP_NOWARN, order);
1479 } while (!sctp_port_hashtable && --order > 0);
1480
1481 if (!sctp_port_hashtable) {
1482 pr_err("Failed bind hash alloc\n");
1483 status = -ENOMEM;
1484 goto err_bhash_alloc;
1485 }
1486
1487
1488
1489
1490 num_entries = (1UL << order) * PAGE_SIZE /
1491 sizeof(struct sctp_bind_hashbucket);
1492
1493
1494
1495
1496
1497
1498 sctp_port_hashsize = rounddown_pow_of_two(num_entries);
1499
1500 for (i = 0; i < sctp_port_hashsize; i++) {
1501 spin_lock_init(&sctp_port_hashtable[i].lock);
1502 INIT_HLIST_HEAD(&sctp_port_hashtable[i].chain);
1503 }
1504
1505 status = sctp_transport_hashtable_init();
1506 if (status)
1507 goto err_thash_alloc;
1508
1509 pr_info("Hash tables configured (bind %d/%d)\n", sctp_port_hashsize,
1510 num_entries);
1511
1512 sctp_sysctl_register();
1513
1514 INIT_LIST_HEAD(&sctp_address_families);
1515 sctp_v4_pf_init();
1516 sctp_v6_pf_init();
1517 sctp_sched_ops_init();
1518
1519 status = register_pernet_subsys(&sctp_defaults_ops);
1520 if (status)
1521 goto err_register_defaults;
1522
1523 status = sctp_v4_protosw_init();
1524 if (status)
1525 goto err_protosw_init;
1526
1527 status = sctp_v6_protosw_init();
1528 if (status)
1529 goto err_v6_protosw_init;
1530
1531 status = register_pernet_subsys(&sctp_ctrlsock_ops);
1532 if (status)
1533 goto err_register_ctrlsock;
1534
1535 status = sctp_v4_add_protocol();
1536 if (status)
1537 goto err_add_protocol;
1538
1539
1540 status = sctp_v6_add_protocol();
1541 if (status)
1542 goto err_v6_add_protocol;
1543
1544 if (sctp_offload_init() < 0)
1545 pr_crit("%s: Cannot add SCTP protocol offload\n", __func__);
1546
1547out:
1548 return status;
1549err_v6_add_protocol:
1550 sctp_v4_del_protocol();
1551err_add_protocol:
1552 unregister_pernet_subsys(&sctp_ctrlsock_ops);
1553err_register_ctrlsock:
1554 sctp_v6_protosw_exit();
1555err_v6_protosw_init:
1556 sctp_v4_protosw_exit();
1557err_protosw_init:
1558 unregister_pernet_subsys(&sctp_defaults_ops);
1559err_register_defaults:
1560 sctp_v4_pf_exit();
1561 sctp_v6_pf_exit();
1562 sctp_sysctl_unregister();
1563 free_pages((unsigned long)sctp_port_hashtable,
1564 get_order(sctp_port_hashsize *
1565 sizeof(struct sctp_bind_hashbucket)));
1566err_bhash_alloc:
1567 sctp_transport_hashtable_destroy();
1568err_thash_alloc:
1569 kfree(sctp_ep_hashtable);
1570err_ehash_alloc:
1571 percpu_counter_destroy(&sctp_sockets_allocated);
1572err_percpu_counter_init:
1573 kmem_cache_destroy(sctp_chunk_cachep);
1574err_chunk_cachep:
1575 kmem_cache_destroy(sctp_bucket_cachep);
1576 goto out;
1577}
1578
1579
1580static __exit void sctp_exit(void)
1581{
1582
1583
1584
1585
1586
1587 sctp_v6_del_protocol();
1588 sctp_v4_del_protocol();
1589
1590 unregister_pernet_subsys(&sctp_ctrlsock_ops);
1591
1592
1593 sctp_v6_protosw_exit();
1594 sctp_v4_protosw_exit();
1595
1596 unregister_pernet_subsys(&sctp_defaults_ops);
1597
1598
1599 sctp_v6_pf_exit();
1600 sctp_v4_pf_exit();
1601
1602 sctp_sysctl_unregister();
1603
1604 free_pages((unsigned long)sctp_port_hashtable,
1605 get_order(sctp_port_hashsize *
1606 sizeof(struct sctp_bind_hashbucket)));
1607 kfree(sctp_ep_hashtable);
1608 sctp_transport_hashtable_destroy();
1609
1610 percpu_counter_destroy(&sctp_sockets_allocated);
1611
1612 rcu_barrier();
1613
1614 kmem_cache_destroy(sctp_chunk_cachep);
1615 kmem_cache_destroy(sctp_bucket_cachep);
1616}
1617
1618module_init(sctp_init);
1619module_exit(sctp_exit);
1620
1621
1622
1623
1624MODULE_ALIAS("net-pf-" __stringify(PF_INET) "-proto-132");
1625MODULE_ALIAS("net-pf-" __stringify(PF_INET6) "-proto-132");
1626MODULE_AUTHOR("Linux Kernel SCTP developers <linux-sctp@vger.kernel.org>");
1627MODULE_DESCRIPTION("Support for the SCTP protocol (RFC2960)");
1628module_param_named(no_checksums, sctp_checksum_disable, bool, 0644);
1629MODULE_PARM_DESC(no_checksums, "Disable checksums computing and verification");
1630MODULE_LICENSE("GPL");
1631