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.
6 * Copyright (c) 2001-2002 Nokia, Inc.
7 * Copyright (c) 2001 La Monte H.P. Yarroll
9 * This file is part of the SCTP kernel implementation
11 * These functions interface with the sockets layer to implement the
12 * SCTP Extensions for the Sockets API.
14 * Note that the descriptions from the specification are USER level
15 * functions--this file is the functions which populate the struct proto
16 * for SCTP which is the BOTTOM of the sockets interface.
18 * This SCTP implementation is free software;
19 * you can redistribute it and/or modify it under the terms of
20 * the GNU General Public License as published by
21 * the Free Software Foundation; either version 2, or (at your option)
24 * This SCTP implementation is distributed in the hope that it
25 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
26 * ************************
27 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
28 * See the GNU General Public License for more details.
30 * You should have received a copy of the GNU General Public License
31 * along with GNU CC; see the file COPYING. If not, write to
32 * the Free Software Foundation, 59 Temple Place - Suite 330,
33 * Boston, MA 02111-1307, USA.
35 * Please send any bug reports or fixes you make to the
37 * lksctp developers <lksctp-developers@lists.sourceforge.net>
39 * Or submit a bug report through the following website:
40 * http://www.sf.net/projects/lksctp
42 * Written or modified by:
43 * La Monte H.P. Yarroll <piggy@acm.org>
44 * Narasimha Budihal <narsi@refcode.org>
45 * Karl Knutson <karl@athena.chicago.il.us>
46 * Jon Grimm <jgrimm@us.ibm.com>
47 * Xingang Guo <xingang.guo@intel.com>
48 * Daisy Chang <daisyc@us.ibm.com>
49 * Sridhar Samudrala <samudrala@us.ibm.com>
50 * Inaky Perez-Gonzalez <inaky.gonzalez@intel.com>
51 * Ardelle Fan <ardelle.fan@intel.com>
52 * Ryan Layer <rmlayer@us.ibm.com>
53 * Anup Pemmaiah <pemmaiah@cc.usu.edu>
54 * Kevin Gao <kevin.gao@intel.com>
56 * Any bugs reported given to us we will try to fix... any fixes shared will
57 * be incorporated into the next SCTP release.
60 #include <linux/types.h>
61 #include <linux/kernel.h>
62 #include <linux/wait.h>
63 #include <linux/time.h>
65 #include <linux/capability.h>
66 #include <linux/fcntl.h>
67 #include <linux/poll.h>
68 #include <linux/init.h>
69 #include <linux/crypto.h>
73 #include <net/route.h>
75 #include <net/inet_common.h>
77 #include <linux/socket.h> /* for sa_family_t */
79 #include <net/sctp/sctp.h>
80 #include <net/sctp/sm.h>
82 /* WARNING: Please do not remove the SCTP_STATIC attribute to
83 * any of the functions below as they are used to export functions
84 * used by a project regression testsuite.
87 /* Forward declarations for internal helper functions. */
88 static int sctp_writeable(struct sock
*sk
);
89 static void sctp_wfree(struct sk_buff
*skb
);
90 static int sctp_wait_for_sndbuf(struct sctp_association
*, long *timeo_p
,
92 static int sctp_wait_for_packet(struct sock
* sk
, int *err
, long *timeo_p
);
93 static int sctp_wait_for_connect(struct sctp_association
*, long *timeo_p
);
94 static int sctp_wait_for_accept(struct sock
*sk
, long timeo
);
95 static void sctp_wait_for_close(struct sock
*sk
, long timeo
);
96 static struct sctp_af
*sctp_sockaddr_af(struct sctp_sock
*opt
,
97 union sctp_addr
*addr
, int len
);
98 static int sctp_bindx_add(struct sock
*, struct sockaddr
*, int);
99 static int sctp_bindx_rem(struct sock
*, struct sockaddr
*, int);
100 static int sctp_send_asconf_add_ip(struct sock
*, struct sockaddr
*, int);
101 static int sctp_send_asconf_del_ip(struct sock
*, struct sockaddr
*, int);
102 static int sctp_send_asconf(struct sctp_association
*asoc
,
103 struct sctp_chunk
*chunk
);
104 static int sctp_do_bind(struct sock
*, union sctp_addr
*, int);
105 static int sctp_autobind(struct sock
*sk
);
106 static void sctp_sock_migrate(struct sock
*, struct sock
*,
107 struct sctp_association
*, sctp_socket_type_t
);
108 static char *sctp_hmac_alg
= SCTP_COOKIE_HMAC_ALG
;
110 extern struct kmem_cache
*sctp_bucket_cachep
;
111 extern int sysctl_sctp_mem
[3];
112 extern int sysctl_sctp_rmem
[3];
113 extern int sysctl_sctp_wmem
[3];
115 static int sctp_memory_pressure
;
116 static atomic_t sctp_memory_allocated
;
117 static atomic_t sctp_sockets_allocated
;
119 static void sctp_enter_memory_pressure(void)
121 sctp_memory_pressure
= 1;
125 /* Get the sndbuf space available at the time on the association. */
126 static inline int sctp_wspace(struct sctp_association
*asoc
)
130 if (asoc
->ep
->sndbuf_policy
)
131 amt
= asoc
->sndbuf_used
;
133 amt
= atomic_read(&asoc
->base
.sk
->sk_wmem_alloc
);
135 if (amt
>= asoc
->base
.sk
->sk_sndbuf
) {
136 if (asoc
->base
.sk
->sk_userlocks
& SOCK_SNDBUF_LOCK
)
139 amt
= sk_stream_wspace(asoc
->base
.sk
);
144 amt
= asoc
->base
.sk
->sk_sndbuf
- amt
;
149 /* Increment the used sndbuf space count of the corresponding association by
150 * the size of the outgoing data chunk.
151 * Also, set the skb destructor for sndbuf accounting later.
153 * Since it is always 1-1 between chunk and skb, and also a new skb is always
154 * allocated for chunk bundling in sctp_packet_transmit(), we can use the
155 * destructor in the data chunk skb for the purpose of the sndbuf space
158 static inline void sctp_set_owner_w(struct sctp_chunk
*chunk
)
160 struct sctp_association
*asoc
= chunk
->asoc
;
161 struct sock
*sk
= asoc
->base
.sk
;
163 /* The sndbuf space is tracked per association. */
164 sctp_association_hold(asoc
);
166 skb_set_owner_w(chunk
->skb
, sk
);
168 chunk
->skb
->destructor
= sctp_wfree
;
169 /* Save the chunk pointer in skb for sctp_wfree to use later. */
170 *((struct sctp_chunk
**)(chunk
->skb
->cb
)) = chunk
;
172 asoc
->sndbuf_used
+= SCTP_DATA_SNDSIZE(chunk
) +
173 sizeof(struct sk_buff
) +
174 sizeof(struct sctp_chunk
);
176 atomic_add(sizeof(struct sctp_chunk
), &sk
->sk_wmem_alloc
);
177 sk
->sk_wmem_queued
+= chunk
->skb
->truesize
;
178 sk_mem_charge(sk
, chunk
->skb
->truesize
);
181 /* Verify that this is a valid address. */
182 static inline int sctp_verify_addr(struct sock
*sk
, union sctp_addr
*addr
,
187 /* Verify basic sockaddr. */
188 af
= sctp_sockaddr_af(sctp_sk(sk
), addr
, len
);
192 /* Is this a valid SCTP address? */
193 if (!af
->addr_valid(addr
, sctp_sk(sk
), NULL
))
196 if (!sctp_sk(sk
)->pf
->send_verify(sctp_sk(sk
), (addr
)))
202 /* Look up the association by its id. If this is not a UDP-style
203 * socket, the ID field is always ignored.
205 struct sctp_association
*sctp_id2assoc(struct sock
*sk
, sctp_assoc_t id
)
207 struct sctp_association
*asoc
= NULL
;
209 /* If this is not a UDP-style socket, assoc id should be ignored. */
210 if (!sctp_style(sk
, UDP
)) {
211 /* Return NULL if the socket state is not ESTABLISHED. It
212 * could be a TCP-style listening socket or a socket which
213 * hasn't yet called connect() to establish an association.
215 if (!sctp_sstate(sk
, ESTABLISHED
))
218 /* Get the first and the only association from the list. */
219 if (!list_empty(&sctp_sk(sk
)->ep
->asocs
))
220 asoc
= list_entry(sctp_sk(sk
)->ep
->asocs
.next
,
221 struct sctp_association
, asocs
);
225 /* Otherwise this is a UDP-style socket. */
226 if (!id
|| (id
== (sctp_assoc_t
)-1))
229 spin_lock_bh(&sctp_assocs_id_lock
);
230 asoc
= (struct sctp_association
*)idr_find(&sctp_assocs_id
, (int)id
);
231 spin_unlock_bh(&sctp_assocs_id_lock
);
233 if (!asoc
|| (asoc
->base
.sk
!= sk
) || asoc
->base
.dead
)
239 /* Look up the transport from an address and an assoc id. If both address and
240 * id are specified, the associations matching the address and the id should be
243 static struct sctp_transport
*sctp_addr_id2transport(struct sock
*sk
,
244 struct sockaddr_storage
*addr
,
247 struct sctp_association
*addr_asoc
= NULL
, *id_asoc
= NULL
;
248 struct sctp_transport
*transport
;
249 union sctp_addr
*laddr
= (union sctp_addr
*)addr
;
251 addr_asoc
= sctp_endpoint_lookup_assoc(sctp_sk(sk
)->ep
,
258 id_asoc
= sctp_id2assoc(sk
, id
);
259 if (id_asoc
&& (id_asoc
!= addr_asoc
))
262 sctp_get_pf_specific(sk
->sk_family
)->addr_v4map(sctp_sk(sk
),
263 (union sctp_addr
*)addr
);
268 /* API 3.1.2 bind() - UDP Style Syntax
269 * The syntax of bind() is,
271 * ret = bind(int sd, struct sockaddr *addr, int addrlen);
273 * sd - the socket descriptor returned by socket().
274 * addr - the address structure (struct sockaddr_in or struct
275 * sockaddr_in6 [RFC 2553]),
276 * addr_len - the size of the address structure.
278 SCTP_STATIC
int sctp_bind(struct sock
*sk
, struct sockaddr
*addr
, int addr_len
)
284 SCTP_DEBUG_PRINTK("sctp_bind(sk: %p, addr: %p, addr_len: %d)\n",
287 /* Disallow binding twice. */
288 if (!sctp_sk(sk
)->ep
->base
.bind_addr
.port
)
289 retval
= sctp_do_bind(sk
, (union sctp_addr
*)addr
,
294 sctp_release_sock(sk
);
299 static long sctp_get_port_local(struct sock
*, union sctp_addr
*);
301 /* Verify this is a valid sockaddr. */
302 static struct sctp_af
*sctp_sockaddr_af(struct sctp_sock
*opt
,
303 union sctp_addr
*addr
, int len
)
307 /* Check minimum size. */
308 if (len
< sizeof (struct sockaddr
))
311 /* Does this PF support this AF? */
312 if (!opt
->pf
->af_supported(addr
->sa
.sa_family
, opt
))
315 /* If we get this far, af is valid. */
316 af
= sctp_get_af_specific(addr
->sa
.sa_family
);
318 if (len
< af
->sockaddr_len
)
324 /* Bind a local address either to an endpoint or to an association. */
325 SCTP_STATIC
int sctp_do_bind(struct sock
*sk
, union sctp_addr
*addr
, int len
)
327 struct sctp_sock
*sp
= sctp_sk(sk
);
328 struct sctp_endpoint
*ep
= sp
->ep
;
329 struct sctp_bind_addr
*bp
= &ep
->base
.bind_addr
;
334 /* Common sockaddr verification. */
335 af
= sctp_sockaddr_af(sp
, addr
, len
);
337 SCTP_DEBUG_PRINTK("sctp_do_bind(sk: %p, newaddr: %p, len: %d) EINVAL\n",
342 snum
= ntohs(addr
->v4
.sin_port
);
344 SCTP_DEBUG_PRINTK_IPADDR("sctp_do_bind(sk: %p, new addr: ",
345 ", port: %d, new port: %d, len: %d)\n",
351 /* PF specific bind() address verification. */
352 if (!sp
->pf
->bind_verify(sp
, addr
))
353 return -EADDRNOTAVAIL
;
355 /* We must either be unbound, or bind to the same port.
356 * It's OK to allow 0 ports if we are already bound.
357 * We'll just inhert an already bound port in this case
362 else if (snum
!= bp
->port
) {
363 SCTP_DEBUG_PRINTK("sctp_do_bind:"
364 " New port %d does not match existing port "
365 "%d.\n", snum
, bp
->port
);
370 if (snum
&& snum
< PROT_SOCK
&& !capable(CAP_NET_BIND_SERVICE
))
373 /* Make sure we are allowed to bind here.
374 * The function sctp_get_port_local() does duplicate address
377 addr
->v4
.sin_port
= htons(snum
);
378 if ((ret
= sctp_get_port_local(sk
, addr
))) {
379 if (ret
== (long) sk
) {
380 /* This endpoint has a conflicting address. */
387 /* Refresh ephemeral port. */
389 bp
->port
= inet_sk(sk
)->num
;
391 /* Add the address to the bind address list.
392 * Use GFP_ATOMIC since BHs will be disabled.
394 ret
= sctp_add_bind_addr(bp
, addr
, SCTP_ADDR_SRC
, GFP_ATOMIC
);
396 /* Copy back into socket for getsockname() use. */
398 inet_sk(sk
)->sport
= htons(inet_sk(sk
)->num
);
399 af
->to_sk_saddr(addr
, sk
);
405 /* ADDIP Section 4.1.1 Congestion Control of ASCONF Chunks
407 * R1) One and only one ASCONF Chunk MAY be in transit and unacknowledged
408 * at any one time. If a sender, after sending an ASCONF chunk, decides
409 * it needs to transfer another ASCONF Chunk, it MUST wait until the
410 * ASCONF-ACK Chunk returns from the previous ASCONF Chunk before sending a
411 * subsequent ASCONF. Note this restriction binds each side, so at any
412 * time two ASCONF may be in-transit on any given association (one sent
413 * from each endpoint).
415 static int sctp_send_asconf(struct sctp_association
*asoc
,
416 struct sctp_chunk
*chunk
)
420 /* If there is an outstanding ASCONF chunk, queue it for later
423 if (asoc
->addip_last_asconf
) {
424 list_add_tail(&chunk
->list
, &asoc
->addip_chunk_list
);
428 /* Hold the chunk until an ASCONF_ACK is received. */
429 sctp_chunk_hold(chunk
);
430 retval
= sctp_primitive_ASCONF(asoc
, chunk
);
432 sctp_chunk_free(chunk
);
434 asoc
->addip_last_asconf
= chunk
;
440 /* Add a list of addresses as bind addresses to local endpoint or
443 * Basically run through each address specified in the addrs/addrcnt
444 * array/length pair, determine if it is IPv6 or IPv4 and call
445 * sctp_do_bind() on it.
447 * If any of them fails, then the operation will be reversed and the
448 * ones that were added will be removed.
450 * Only sctp_setsockopt_bindx() is supposed to call this function.
452 static int sctp_bindx_add(struct sock
*sk
, struct sockaddr
*addrs
, int addrcnt
)
457 struct sockaddr
*sa_addr
;
460 SCTP_DEBUG_PRINTK("sctp_bindx_add (sk: %p, addrs: %p, addrcnt: %d)\n",
464 for (cnt
= 0; cnt
< addrcnt
; cnt
++) {
465 /* The list may contain either IPv4 or IPv6 address;
466 * determine the address length for walking thru the list.
468 sa_addr
= (struct sockaddr
*)addr_buf
;
469 af
= sctp_get_af_specific(sa_addr
->sa_family
);
475 retval
= sctp_do_bind(sk
, (union sctp_addr
*)sa_addr
,
478 addr_buf
+= af
->sockaddr_len
;
482 /* Failed. Cleanup the ones that have been added */
484 sctp_bindx_rem(sk
, addrs
, cnt
);
492 /* Send an ASCONF chunk with Add IP address parameters to all the peers of the
493 * associations that are part of the endpoint indicating that a list of local
494 * addresses are added to the endpoint.
496 * If any of the addresses is already in the bind address list of the
497 * association, we do not send the chunk for that association. But it will not
498 * affect other associations.
500 * Only sctp_setsockopt_bindx() is supposed to call this function.
502 static int sctp_send_asconf_add_ip(struct sock
*sk
,
503 struct sockaddr
*addrs
,
506 struct sctp_sock
*sp
;
507 struct sctp_endpoint
*ep
;
508 struct sctp_association
*asoc
;
509 struct sctp_bind_addr
*bp
;
510 struct sctp_chunk
*chunk
;
511 struct sctp_sockaddr_entry
*laddr
;
512 union sctp_addr
*addr
;
513 union sctp_addr saveaddr
;
516 struct list_head
*pos
;
521 if (!sctp_addip_enable
)
527 SCTP_DEBUG_PRINTK("%s: (sk: %p, addrs: %p, addrcnt: %d)\n",
528 __FUNCTION__
, sk
, addrs
, addrcnt
);
530 list_for_each(pos
, &ep
->asocs
) {
531 asoc
= list_entry(pos
, struct sctp_association
, asocs
);
533 if (!asoc
->peer
.asconf_capable
)
536 if (asoc
->peer
.addip_disabled_mask
& SCTP_PARAM_ADD_IP
)
539 if (!sctp_state(asoc
, ESTABLISHED
))
542 /* Check if any address in the packed array of addresses is
543 * in the bind address list of the association. If so,
544 * do not send the asconf chunk to its peer, but continue with
545 * other associations.
548 for (i
= 0; i
< addrcnt
; i
++) {
549 addr
= (union sctp_addr
*)addr_buf
;
550 af
= sctp_get_af_specific(addr
->v4
.sin_family
);
556 if (sctp_assoc_lookup_laddr(asoc
, addr
))
559 addr_buf
+= af
->sockaddr_len
;
564 /* Use the first valid address in bind addr list of
565 * association as Address Parameter of ASCONF CHUNK.
567 bp
= &asoc
->base
.bind_addr
;
568 p
= bp
->address_list
.next
;
569 laddr
= list_entry(p
, struct sctp_sockaddr_entry
, list
);
570 chunk
= sctp_make_asconf_update_ip(asoc
, &laddr
->a
, addrs
,
571 addrcnt
, SCTP_PARAM_ADD_IP
);
577 retval
= sctp_send_asconf(asoc
, chunk
);
581 /* Add the new addresses to the bind address list with
582 * use_as_src set to 0.
585 for (i
= 0; i
< addrcnt
; i
++) {
586 addr
= (union sctp_addr
*)addr_buf
;
587 af
= sctp_get_af_specific(addr
->v4
.sin_family
);
588 memcpy(&saveaddr
, addr
, af
->sockaddr_len
);
589 retval
= sctp_add_bind_addr(bp
, &saveaddr
,
590 SCTP_ADDR_NEW
, GFP_ATOMIC
);
591 addr_buf
+= af
->sockaddr_len
;
599 /* Remove a list of addresses from bind addresses list. Do not remove the
602 * Basically run through each address specified in the addrs/addrcnt
603 * array/length pair, determine if it is IPv6 or IPv4 and call
604 * sctp_del_bind() on it.
606 * If any of them fails, then the operation will be reversed and the
607 * ones that were removed will be added back.
609 * At least one address has to be left; if only one address is
610 * available, the operation will return -EBUSY.
612 * Only sctp_setsockopt_bindx() is supposed to call this function.
614 static int sctp_bindx_rem(struct sock
*sk
, struct sockaddr
*addrs
, int addrcnt
)
616 struct sctp_sock
*sp
= sctp_sk(sk
);
617 struct sctp_endpoint
*ep
= sp
->ep
;
619 struct sctp_bind_addr
*bp
= &ep
->base
.bind_addr
;
622 union sctp_addr
*sa_addr
;
625 SCTP_DEBUG_PRINTK("sctp_bindx_rem (sk: %p, addrs: %p, addrcnt: %d)\n",
629 for (cnt
= 0; cnt
< addrcnt
; cnt
++) {
630 /* If the bind address list is empty or if there is only one
631 * bind address, there is nothing more to be removed (we need
632 * at least one address here).
634 if (list_empty(&bp
->address_list
) ||
635 (sctp_list_single_entry(&bp
->address_list
))) {
640 sa_addr
= (union sctp_addr
*)addr_buf
;
641 af
= sctp_get_af_specific(sa_addr
->sa
.sa_family
);
647 if (!af
->addr_valid(sa_addr
, sp
, NULL
)) {
648 retval
= -EADDRNOTAVAIL
;
652 if (sa_addr
->v4
.sin_port
!= htons(bp
->port
)) {
657 /* FIXME - There is probably a need to check if sk->sk_saddr and
658 * sk->sk_rcv_addr are currently set to one of the addresses to
659 * be removed. This is something which needs to be looked into
660 * when we are fixing the outstanding issues with multi-homing
661 * socket routing and failover schemes. Refer to comments in
662 * sctp_do_bind(). -daisy
664 retval
= sctp_del_bind_addr(bp
, sa_addr
);
666 addr_buf
+= af
->sockaddr_len
;
669 /* Failed. Add the ones that has been removed back */
671 sctp_bindx_add(sk
, addrs
, cnt
);
679 /* Send an ASCONF chunk with Delete IP address parameters to all the peers of
680 * the associations that are part of the endpoint indicating that a list of
681 * local addresses are removed from the endpoint.
683 * If any of the addresses is already in the bind address list of the
684 * association, we do not send the chunk for that association. But it will not
685 * affect other associations.
687 * Only sctp_setsockopt_bindx() is supposed to call this function.
689 static int sctp_send_asconf_del_ip(struct sock
*sk
,
690 struct sockaddr
*addrs
,
693 struct sctp_sock
*sp
;
694 struct sctp_endpoint
*ep
;
695 struct sctp_association
*asoc
;
696 struct sctp_transport
*transport
;
697 struct sctp_bind_addr
*bp
;
698 struct sctp_chunk
*chunk
;
699 union sctp_addr
*laddr
;
702 struct list_head
*pos
, *pos1
;
703 struct sctp_sockaddr_entry
*saddr
;
707 if (!sctp_addip_enable
)
713 SCTP_DEBUG_PRINTK("%s: (sk: %p, addrs: %p, addrcnt: %d)\n",
714 __FUNCTION__
, sk
, addrs
, addrcnt
);
716 list_for_each(pos
, &ep
->asocs
) {
717 asoc
= list_entry(pos
, struct sctp_association
, asocs
);
719 if (!asoc
->peer
.asconf_capable
)
722 if (asoc
->peer
.addip_disabled_mask
& SCTP_PARAM_DEL_IP
)
725 if (!sctp_state(asoc
, ESTABLISHED
))
728 /* Check if any address in the packed array of addresses is
729 * not present in the bind address list of the association.
730 * If so, do not send the asconf chunk to its peer, but
731 * continue with other associations.
734 for (i
= 0; i
< addrcnt
; i
++) {
735 laddr
= (union sctp_addr
*)addr_buf
;
736 af
= sctp_get_af_specific(laddr
->v4
.sin_family
);
742 if (!sctp_assoc_lookup_laddr(asoc
, laddr
))
745 addr_buf
+= af
->sockaddr_len
;
750 /* Find one address in the association's bind address list
751 * that is not in the packed array of addresses. This is to
752 * make sure that we do not delete all the addresses in the
755 bp
= &asoc
->base
.bind_addr
;
756 laddr
= sctp_find_unmatch_addr(bp
, (union sctp_addr
*)addrs
,
761 /* We do not need RCU protection throughout this loop
762 * because this is done under a socket lock from the
765 chunk
= sctp_make_asconf_update_ip(asoc
, laddr
, addrs
, addrcnt
,
772 /* Reset use_as_src flag for the addresses in the bind address
773 * list that are to be deleted.
776 for (i
= 0; i
< addrcnt
; i
++) {
777 laddr
= (union sctp_addr
*)addr_buf
;
778 af
= sctp_get_af_specific(laddr
->v4
.sin_family
);
779 list_for_each_entry(saddr
, &bp
->address_list
, list
) {
780 if (sctp_cmp_addr_exact(&saddr
->a
, laddr
))
781 saddr
->state
= SCTP_ADDR_DEL
;
783 addr_buf
+= af
->sockaddr_len
;
786 /* Update the route and saddr entries for all the transports
787 * as some of the addresses in the bind address list are
788 * about to be deleted and cannot be used as source addresses.
790 list_for_each(pos1
, &asoc
->peer
.transport_addr_list
) {
791 transport
= list_entry(pos1
, struct sctp_transport
,
793 dst_release(transport
->dst
);
794 sctp_transport_route(transport
, NULL
,
795 sctp_sk(asoc
->base
.sk
));
798 retval
= sctp_send_asconf(asoc
, chunk
);
804 /* Helper for tunneling sctp_bindx() requests through sctp_setsockopt()
807 * int sctp_bindx(int sd, struct sockaddr *addrs, int addrcnt,
810 * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses.
811 * If the sd is an IPv6 socket, the addresses passed can either be IPv4
814 * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see
815 * Section 3.1.2 for this usage.
817 * addrs is a pointer to an array of one or more socket addresses. Each
818 * address is contained in its appropriate structure (i.e. struct
819 * sockaddr_in or struct sockaddr_in6) the family of the address type
820 * must be used to distinguish the address length (note that this
821 * representation is termed a "packed array" of addresses). The caller
822 * specifies the number of addresses in the array with addrcnt.
824 * On success, sctp_bindx() returns 0. On failure, sctp_bindx() returns
825 * -1, and sets errno to the appropriate error code.
827 * For SCTP, the port given in each socket address must be the same, or
828 * sctp_bindx() will fail, setting errno to EINVAL.
830 * The flags parameter is formed from the bitwise OR of zero or more of
831 * the following currently defined flags:
833 * SCTP_BINDX_ADD_ADDR
835 * SCTP_BINDX_REM_ADDR
837 * SCTP_BINDX_ADD_ADDR directs SCTP to add the given addresses to the
838 * association, and SCTP_BINDX_REM_ADDR directs SCTP to remove the given
839 * addresses from the association. The two flags are mutually exclusive;
840 * if both are given, sctp_bindx() will fail with EINVAL. A caller may
841 * not remove all addresses from an association; sctp_bindx() will
842 * reject such an attempt with EINVAL.
844 * An application can use sctp_bindx(SCTP_BINDX_ADD_ADDR) to associate
845 * additional addresses with an endpoint after calling bind(). Or use
846 * sctp_bindx(SCTP_BINDX_REM_ADDR) to remove some addresses a listening
847 * socket is associated with so that no new association accepted will be
848 * associated with those addresses. If the endpoint supports dynamic
849 * address a SCTP_BINDX_REM_ADDR or SCTP_BINDX_ADD_ADDR may cause a
850 * endpoint to send the appropriate message to the peer to change the
851 * peers address lists.
853 * Adding and removing addresses from a connected association is
854 * optional functionality. Implementations that do not support this
855 * functionality should return EOPNOTSUPP.
857 * Basically do nothing but copying the addresses from user to kernel
858 * land and invoking either sctp_bindx_add() or sctp_bindx_rem() on the sk.
859 * This is used for tunneling the sctp_bindx() request through sctp_setsockopt()
862 * We don't use copy_from_user() for optimization: we first do the
863 * sanity checks (buffer size -fast- and access check-healthy
864 * pointer); if all of those succeed, then we can alloc the memory
865 * (expensive operation) needed to copy the data to kernel. Then we do
866 * the copying without checking the user space area
867 * (__copy_from_user()).
869 * On exit there is no need to do sockfd_put(), sys_setsockopt() does
872 * sk The sk of the socket
873 * addrs The pointer to the addresses in user land
874 * addrssize Size of the addrs buffer
875 * op Operation to perform (add or remove, see the flags of
878 * Returns 0 if ok, <0 errno code on error.
880 SCTP_STATIC
int sctp_setsockopt_bindx(struct sock
* sk
,
881 struct sockaddr __user
*addrs
,
882 int addrs_size
, int op
)
884 struct sockaddr
*kaddrs
;
888 struct sockaddr
*sa_addr
;
892 SCTP_DEBUG_PRINTK("sctp_setsocktopt_bindx: sk %p addrs %p"
893 " addrs_size %d opt %d\n", sk
, addrs
, addrs_size
, op
);
895 if (unlikely(addrs_size
<= 0))
898 /* Check the user passed a healthy pointer. */
899 if (unlikely(!access_ok(VERIFY_READ
, addrs
, addrs_size
)))
902 /* Alloc space for the address array in kernel memory. */
903 kaddrs
= kmalloc(addrs_size
, GFP_KERNEL
);
904 if (unlikely(!kaddrs
))
907 if (__copy_from_user(kaddrs
, addrs
, addrs_size
)) {
912 /* Walk through the addrs buffer and count the number of addresses. */
914 while (walk_size
< addrs_size
) {
915 sa_addr
= (struct sockaddr
*)addr_buf
;
916 af
= sctp_get_af_specific(sa_addr
->sa_family
);
918 /* If the address family is not supported or if this address
919 * causes the address buffer to overflow return EINVAL.
921 if (!af
|| (walk_size
+ af
->sockaddr_len
) > addrs_size
) {
926 addr_buf
+= af
->sockaddr_len
;
927 walk_size
+= af
->sockaddr_len
;
932 case SCTP_BINDX_ADD_ADDR
:
933 err
= sctp_bindx_add(sk
, kaddrs
, addrcnt
);
936 err
= sctp_send_asconf_add_ip(sk
, kaddrs
, addrcnt
);
939 case SCTP_BINDX_REM_ADDR
:
940 err
= sctp_bindx_rem(sk
, kaddrs
, addrcnt
);
943 err
= sctp_send_asconf_del_ip(sk
, kaddrs
, addrcnt
);
957 /* __sctp_connect(struct sock* sk, struct sockaddr *kaddrs, int addrs_size)
959 * Common routine for handling connect() and sctp_connectx().
960 * Connect will come in with just a single address.
962 static int __sctp_connect(struct sock
* sk
,
963 struct sockaddr
*kaddrs
,
966 struct sctp_sock
*sp
;
967 struct sctp_endpoint
*ep
;
968 struct sctp_association
*asoc
= NULL
;
969 struct sctp_association
*asoc2
;
970 struct sctp_transport
*transport
;
978 union sctp_addr
*sa_addr
= NULL
;
981 unsigned int f_flags
= 0;
986 /* connect() cannot be done on a socket that is already in ESTABLISHED
987 * state - UDP-style peeled off socket or a TCP-style socket that
988 * is already connected.
989 * It cannot be done even on a TCP-style listening socket.
991 if (sctp_sstate(sk
, ESTABLISHED
) ||
992 (sctp_style(sk
, TCP
) && sctp_sstate(sk
, LISTENING
))) {
997 /* Walk through the addrs buffer and count the number of addresses. */
999 while (walk_size
< addrs_size
) {
1000 sa_addr
= (union sctp_addr
*)addr_buf
;
1001 af
= sctp_get_af_specific(sa_addr
->sa
.sa_family
);
1002 port
= ntohs(sa_addr
->v4
.sin_port
);
1004 /* If the address family is not supported or if this address
1005 * causes the address buffer to overflow return EINVAL.
1007 if (!af
|| (walk_size
+ af
->sockaddr_len
) > addrs_size
) {
1012 /* Save current address so we can work with it */
1013 memcpy(&to
, sa_addr
, af
->sockaddr_len
);
1015 err
= sctp_verify_addr(sk
, &to
, af
->sockaddr_len
);
1019 /* Make sure the destination port is correctly set
1022 if (asoc
&& asoc
->peer
.port
&& asoc
->peer
.port
!= port
)
1026 /* Check if there already is a matching association on the
1027 * endpoint (other than the one created here).
1029 asoc2
= sctp_endpoint_lookup_assoc(ep
, &to
, &transport
);
1030 if (asoc2
&& asoc2
!= asoc
) {
1031 if (asoc2
->state
>= SCTP_STATE_ESTABLISHED
)
1038 /* If we could not find a matching association on the endpoint,
1039 * make sure that there is no peeled-off association matching
1040 * the peer address even on another socket.
1042 if (sctp_endpoint_is_peeled_off(ep
, &to
)) {
1043 err
= -EADDRNOTAVAIL
;
1048 /* If a bind() or sctp_bindx() is not called prior to
1049 * an sctp_connectx() call, the system picks an
1050 * ephemeral port and will choose an address set
1051 * equivalent to binding with a wildcard address.
1053 if (!ep
->base
.bind_addr
.port
) {
1054 if (sctp_autobind(sk
)) {
1060 * If an unprivileged user inherits a 1-many
1061 * style socket with open associations on a
1062 * privileged port, it MAY be permitted to
1063 * accept new associations, but it SHOULD NOT
1064 * be permitted to open new associations.
1066 if (ep
->base
.bind_addr
.port
< PROT_SOCK
&&
1067 !capable(CAP_NET_BIND_SERVICE
)) {
1073 scope
= sctp_scope(&to
);
1074 asoc
= sctp_association_new(ep
, sk
, scope
, GFP_KERNEL
);
1081 /* Prime the peer's transport structures. */
1082 transport
= sctp_assoc_add_peer(asoc
, &to
, GFP_KERNEL
,
1090 addr_buf
+= af
->sockaddr_len
;
1091 walk_size
+= af
->sockaddr_len
;
1094 err
= sctp_assoc_set_bind_addr_from_ep(asoc
, GFP_KERNEL
);
1099 err
= sctp_primitive_ASSOCIATE(asoc
, NULL
);
1104 /* Initialize sk's dport and daddr for getpeername() */
1105 inet_sk(sk
)->dport
= htons(asoc
->peer
.port
);
1106 af
= sctp_get_af_specific(sa_addr
->sa
.sa_family
);
1107 af
->to_sk_daddr(sa_addr
, sk
);
1110 /* in-kernel sockets don't generally have a file allocated to them
1111 * if all they do is call sock_create_kern().
1113 if (sk
->sk_socket
->file
)
1114 f_flags
= sk
->sk_socket
->file
->f_flags
;
1116 timeo
= sock_sndtimeo(sk
, f_flags
& O_NONBLOCK
);
1118 err
= sctp_wait_for_connect(asoc
, &timeo
);
1120 /* Don't free association on exit. */
1125 SCTP_DEBUG_PRINTK("About to exit __sctp_connect() free asoc: %p"
1126 " kaddrs: %p err: %d\n",
1129 sctp_association_free(asoc
);
1133 /* Helper for tunneling sctp_connectx() requests through sctp_setsockopt()
1136 * int sctp_connectx(int sd, struct sockaddr *addrs, int addrcnt);
1138 * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses.
1139 * If the sd is an IPv6 socket, the addresses passed can either be IPv4
1140 * or IPv6 addresses.
1142 * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see
1143 * Section 3.1.2 for this usage.
1145 * addrs is a pointer to an array of one or more socket addresses. Each
1146 * address is contained in its appropriate structure (i.e. struct
1147 * sockaddr_in or struct sockaddr_in6) the family of the address type
1148 * must be used to distengish the address length (note that this
1149 * representation is termed a "packed array" of addresses). The caller
1150 * specifies the number of addresses in the array with addrcnt.
1152 * On success, sctp_connectx() returns 0. On failure, sctp_connectx() returns
1153 * -1, and sets errno to the appropriate error code.
1155 * For SCTP, the port given in each socket address must be the same, or
1156 * sctp_connectx() will fail, setting errno to EINVAL.
1158 * An application can use sctp_connectx to initiate an association with
1159 * an endpoint that is multi-homed. Much like sctp_bindx() this call
1160 * allows a caller to specify multiple addresses at which a peer can be
1161 * reached. The way the SCTP stack uses the list of addresses to set up
1162 * the association is implementation dependant. This function only
1163 * specifies that the stack will try to make use of all the addresses in
1164 * the list when needed.
1166 * Note that the list of addresses passed in is only used for setting up
1167 * the association. It does not necessarily equal the set of addresses
1168 * the peer uses for the resulting association. If the caller wants to
1169 * find out the set of peer addresses, it must use sctp_getpaddrs() to
1170 * retrieve them after the association has been set up.
1172 * Basically do nothing but copying the addresses from user to kernel
1173 * land and invoking either sctp_connectx(). This is used for tunneling
1174 * the sctp_connectx() request through sctp_setsockopt() from userspace.
1176 * We don't use copy_from_user() for optimization: we first do the
1177 * sanity checks (buffer size -fast- and access check-healthy
1178 * pointer); if all of those succeed, then we can alloc the memory
1179 * (expensive operation) needed to copy the data to kernel. Then we do
1180 * the copying without checking the user space area
1181 * (__copy_from_user()).
1183 * On exit there is no need to do sockfd_put(), sys_setsockopt() does
1186 * sk The sk of the socket
1187 * addrs The pointer to the addresses in user land
1188 * addrssize Size of the addrs buffer
1190 * Returns 0 if ok, <0 errno code on error.
1192 SCTP_STATIC
int sctp_setsockopt_connectx(struct sock
* sk
,
1193 struct sockaddr __user
*addrs
,
1197 struct sockaddr
*kaddrs
;
1199 SCTP_DEBUG_PRINTK("%s - sk %p addrs %p addrs_size %d\n",
1200 __FUNCTION__
, sk
, addrs
, addrs_size
);
1202 if (unlikely(addrs_size
<= 0))
1205 /* Check the user passed a healthy pointer. */
1206 if (unlikely(!access_ok(VERIFY_READ
, addrs
, addrs_size
)))
1209 /* Alloc space for the address array in kernel memory. */
1210 kaddrs
= kmalloc(addrs_size
, GFP_KERNEL
);
1211 if (unlikely(!kaddrs
))
1214 if (__copy_from_user(kaddrs
, addrs
, addrs_size
)) {
1217 err
= __sctp_connect(sk
, kaddrs
, addrs_size
);
1224 /* API 3.1.4 close() - UDP Style Syntax
1225 * Applications use close() to perform graceful shutdown (as described in
1226 * Section 10.1 of [SCTP]) on ALL the associations currently represented
1227 * by a UDP-style socket.
1231 * ret = close(int sd);
1233 * sd - the socket descriptor of the associations to be closed.
1235 * To gracefully shutdown a specific association represented by the
1236 * UDP-style socket, an application should use the sendmsg() call,
1237 * passing no user data, but including the appropriate flag in the
1238 * ancillary data (see Section xxxx).
1240 * If sd in the close() call is a branched-off socket representing only
1241 * one association, the shutdown is performed on that association only.
1243 * 4.1.6 close() - TCP Style Syntax
1245 * Applications use close() to gracefully close down an association.
1249 * int close(int sd);
1251 * sd - the socket descriptor of the association to be closed.
1253 * After an application calls close() on a socket descriptor, no further
1254 * socket operations will succeed on that descriptor.
1256 * API 7.1.4 SO_LINGER
1258 * An application using the TCP-style socket can use this option to
1259 * perform the SCTP ABORT primitive. The linger option structure is:
1262 * int l_onoff; // option on/off
1263 * int l_linger; // linger time
1266 * To enable the option, set l_onoff to 1. If the l_linger value is set
1267 * to 0, calling close() is the same as the ABORT primitive. If the
1268 * value is set to a negative value, the setsockopt() call will return
1269 * an error. If the value is set to a positive value linger_time, the
1270 * close() can be blocked for at most linger_time ms. If the graceful
1271 * shutdown phase does not finish during this period, close() will
1272 * return but the graceful shutdown phase continues in the system.
1274 SCTP_STATIC
void sctp_close(struct sock
*sk
, long timeout
)
1276 struct sctp_endpoint
*ep
;
1277 struct sctp_association
*asoc
;
1278 struct list_head
*pos
, *temp
;
1280 SCTP_DEBUG_PRINTK("sctp_close(sk: 0x%p, timeout:%ld)\n", sk
, timeout
);
1283 sk
->sk_shutdown
= SHUTDOWN_MASK
;
1285 ep
= sctp_sk(sk
)->ep
;
1287 /* Walk all associations on an endpoint. */
1288 list_for_each_safe(pos
, temp
, &ep
->asocs
) {
1289 asoc
= list_entry(pos
, struct sctp_association
, asocs
);
1291 if (sctp_style(sk
, TCP
)) {
1292 /* A closed association can still be in the list if
1293 * it belongs to a TCP-style listening socket that is
1294 * not yet accepted. If so, free it. If not, send an
1295 * ABORT or SHUTDOWN based on the linger options.
1297 if (sctp_state(asoc
, CLOSED
)) {
1298 sctp_unhash_established(asoc
);
1299 sctp_association_free(asoc
);
1304 if (sock_flag(sk
, SOCK_LINGER
) && !sk
->sk_lingertime
) {
1305 struct sctp_chunk
*chunk
;
1307 chunk
= sctp_make_abort_user(asoc
, NULL
, 0);
1309 sctp_primitive_ABORT(asoc
, chunk
);
1311 sctp_primitive_SHUTDOWN(asoc
, NULL
);
1314 /* Clean up any skbs sitting on the receive queue. */
1315 sctp_queue_purge_ulpevents(&sk
->sk_receive_queue
);
1316 sctp_queue_purge_ulpevents(&sctp_sk(sk
)->pd_lobby
);
1318 /* On a TCP-style socket, block for at most linger_time if set. */
1319 if (sctp_style(sk
, TCP
) && timeout
)
1320 sctp_wait_for_close(sk
, timeout
);
1322 /* This will run the backlog queue. */
1323 sctp_release_sock(sk
);
1325 /* Supposedly, no process has access to the socket, but
1326 * the net layers still may.
1328 sctp_local_bh_disable();
1329 sctp_bh_lock_sock(sk
);
1331 /* Hold the sock, since sk_common_release() will put sock_put()
1332 * and we have just a little more cleanup.
1335 sk_common_release(sk
);
1337 sctp_bh_unlock_sock(sk
);
1338 sctp_local_bh_enable();
1342 SCTP_DBG_OBJCNT_DEC(sock
);
1345 /* Handle EPIPE error. */
1346 static int sctp_error(struct sock
*sk
, int flags
, int err
)
1349 err
= sock_error(sk
) ? : -EPIPE
;
1350 if (err
== -EPIPE
&& !(flags
& MSG_NOSIGNAL
))
1351 send_sig(SIGPIPE
, current
, 0);
1355 /* API 3.1.3 sendmsg() - UDP Style Syntax
1357 * An application uses sendmsg() and recvmsg() calls to transmit data to
1358 * and receive data from its peer.
1360 * ssize_t sendmsg(int socket, const struct msghdr *message,
1363 * socket - the socket descriptor of the endpoint.
1364 * message - pointer to the msghdr structure which contains a single
1365 * user message and possibly some ancillary data.
1367 * See Section 5 for complete description of the data
1370 * flags - flags sent or received with the user message, see Section
1371 * 5 for complete description of the flags.
1373 * Note: This function could use a rewrite especially when explicit
1374 * connect support comes in.
1376 /* BUG: We do not implement the equivalent of sk_stream_wait_memory(). */
1378 SCTP_STATIC
int sctp_msghdr_parse(const struct msghdr
*, sctp_cmsgs_t
*);
1380 SCTP_STATIC
int sctp_sendmsg(struct kiocb
*iocb
, struct sock
*sk
,
1381 struct msghdr
*msg
, size_t msg_len
)
1383 struct sctp_sock
*sp
;
1384 struct sctp_endpoint
*ep
;
1385 struct sctp_association
*new_asoc
=NULL
, *asoc
=NULL
;
1386 struct sctp_transport
*transport
, *chunk_tp
;
1387 struct sctp_chunk
*chunk
;
1389 struct sockaddr
*msg_name
= NULL
;
1390 struct sctp_sndrcvinfo default_sinfo
= { 0 };
1391 struct sctp_sndrcvinfo
*sinfo
;
1392 struct sctp_initmsg
*sinit
;
1393 sctp_assoc_t associd
= 0;
1394 sctp_cmsgs_t cmsgs
= { NULL
};
1398 __u16 sinfo_flags
= 0;
1399 struct sctp_datamsg
*datamsg
;
1400 struct list_head
*pos
;
1401 int msg_flags
= msg
->msg_flags
;
1403 SCTP_DEBUG_PRINTK("sctp_sendmsg(sk: %p, msg: %p, msg_len: %zu)\n",
1410 SCTP_DEBUG_PRINTK("Using endpoint: %p.\n", ep
);
1412 /* We cannot send a message over a TCP-style listening socket. */
1413 if (sctp_style(sk
, TCP
) && sctp_sstate(sk
, LISTENING
)) {
1418 /* Parse out the SCTP CMSGs. */
1419 err
= sctp_msghdr_parse(msg
, &cmsgs
);
1422 SCTP_DEBUG_PRINTK("msghdr parse err = %x\n", err
);
1426 /* Fetch the destination address for this packet. This
1427 * address only selects the association--it is not necessarily
1428 * the address we will send to.
1429 * For a peeled-off socket, msg_name is ignored.
1431 if (!sctp_style(sk
, UDP_HIGH_BANDWIDTH
) && msg
->msg_name
) {
1432 int msg_namelen
= msg
->msg_namelen
;
1434 err
= sctp_verify_addr(sk
, (union sctp_addr
*)msg
->msg_name
,
1439 if (msg_namelen
> sizeof(to
))
1440 msg_namelen
= sizeof(to
);
1441 memcpy(&to
, msg
->msg_name
, msg_namelen
);
1442 msg_name
= msg
->msg_name
;
1448 /* Did the user specify SNDRCVINFO? */
1450 sinfo_flags
= sinfo
->sinfo_flags
;
1451 associd
= sinfo
->sinfo_assoc_id
;
1454 SCTP_DEBUG_PRINTK("msg_len: %zu, sinfo_flags: 0x%x\n",
1455 msg_len
, sinfo_flags
);
1457 /* SCTP_EOF or SCTP_ABORT cannot be set on a TCP-style socket. */
1458 if (sctp_style(sk
, TCP
) && (sinfo_flags
& (SCTP_EOF
| SCTP_ABORT
))) {
1463 /* If SCTP_EOF is set, no data can be sent. Disallow sending zero
1464 * length messages when SCTP_EOF|SCTP_ABORT is not set.
1465 * If SCTP_ABORT is set, the message length could be non zero with
1466 * the msg_iov set to the user abort reason.
1468 if (((sinfo_flags
& SCTP_EOF
) && (msg_len
> 0)) ||
1469 (!(sinfo_flags
& (SCTP_EOF
|SCTP_ABORT
)) && (msg_len
== 0))) {
1474 /* If SCTP_ADDR_OVER is set, there must be an address
1475 * specified in msg_name.
1477 if ((sinfo_flags
& SCTP_ADDR_OVER
) && (!msg
->msg_name
)) {
1484 SCTP_DEBUG_PRINTK("About to look up association.\n");
1488 /* If a msg_name has been specified, assume this is to be used. */
1490 /* Look for a matching association on the endpoint. */
1491 asoc
= sctp_endpoint_lookup_assoc(ep
, &to
, &transport
);
1493 /* If we could not find a matching association on the
1494 * endpoint, make sure that it is not a TCP-style
1495 * socket that already has an association or there is
1496 * no peeled-off association on another socket.
1498 if ((sctp_style(sk
, TCP
) &&
1499 sctp_sstate(sk
, ESTABLISHED
)) ||
1500 sctp_endpoint_is_peeled_off(ep
, &to
)) {
1501 err
= -EADDRNOTAVAIL
;
1506 asoc
= sctp_id2assoc(sk
, associd
);
1514 SCTP_DEBUG_PRINTK("Just looked up association: %p.\n", asoc
);
1516 /* We cannot send a message on a TCP-style SCTP_SS_ESTABLISHED
1517 * socket that has an association in CLOSED state. This can
1518 * happen when an accepted socket has an association that is
1521 if (sctp_state(asoc
, CLOSED
) && sctp_style(sk
, TCP
)) {
1526 if (sinfo_flags
& SCTP_EOF
) {
1527 SCTP_DEBUG_PRINTK("Shutting down association: %p\n",
1529 sctp_primitive_SHUTDOWN(asoc
, NULL
);
1533 if (sinfo_flags
& SCTP_ABORT
) {
1535 chunk
= sctp_make_abort_user(asoc
, msg
, msg_len
);
1541 SCTP_DEBUG_PRINTK("Aborting association: %p\n", asoc
);
1542 sctp_primitive_ABORT(asoc
, chunk
);
1548 /* Do we need to create the association? */
1550 SCTP_DEBUG_PRINTK("There is no association yet.\n");
1552 if (sinfo_flags
& (SCTP_EOF
| SCTP_ABORT
)) {
1557 /* Check for invalid stream against the stream counts,
1558 * either the default or the user specified stream counts.
1561 if (!sinit
|| (sinit
&& !sinit
->sinit_num_ostreams
)) {
1562 /* Check against the defaults. */
1563 if (sinfo
->sinfo_stream
>=
1564 sp
->initmsg
.sinit_num_ostreams
) {
1569 /* Check against the requested. */
1570 if (sinfo
->sinfo_stream
>=
1571 sinit
->sinit_num_ostreams
) {
1579 * API 3.1.2 bind() - UDP Style Syntax
1580 * If a bind() or sctp_bindx() is not called prior to a
1581 * sendmsg() call that initiates a new association, the
1582 * system picks an ephemeral port and will choose an address
1583 * set equivalent to binding with a wildcard address.
1585 if (!ep
->base
.bind_addr
.port
) {
1586 if (sctp_autobind(sk
)) {
1592 * If an unprivileged user inherits a one-to-many
1593 * style socket with open associations on a privileged
1594 * port, it MAY be permitted to accept new associations,
1595 * but it SHOULD NOT be permitted to open new
1598 if (ep
->base
.bind_addr
.port
< PROT_SOCK
&&
1599 !capable(CAP_NET_BIND_SERVICE
)) {
1605 scope
= sctp_scope(&to
);
1606 new_asoc
= sctp_association_new(ep
, sk
, scope
, GFP_KERNEL
);
1613 /* If the SCTP_INIT ancillary data is specified, set all
1614 * the association init values accordingly.
1617 if (sinit
->sinit_num_ostreams
) {
1618 asoc
->c
.sinit_num_ostreams
=
1619 sinit
->sinit_num_ostreams
;
1621 if (sinit
->sinit_max_instreams
) {
1622 asoc
->c
.sinit_max_instreams
=
1623 sinit
->sinit_max_instreams
;
1625 if (sinit
->sinit_max_attempts
) {
1626 asoc
->max_init_attempts
1627 = sinit
->sinit_max_attempts
;
1629 if (sinit
->sinit_max_init_timeo
) {
1630 asoc
->max_init_timeo
=
1631 msecs_to_jiffies(sinit
->sinit_max_init_timeo
);
1635 /* Prime the peer's transport structures. */
1636 transport
= sctp_assoc_add_peer(asoc
, &to
, GFP_KERNEL
, SCTP_UNKNOWN
);
1641 err
= sctp_assoc_set_bind_addr_from_ep(asoc
, GFP_KERNEL
);
1648 /* ASSERT: we have a valid association at this point. */
1649 SCTP_DEBUG_PRINTK("We have a valid association.\n");
1652 /* If the user didn't specify SNDRCVINFO, make up one with
1655 default_sinfo
.sinfo_stream
= asoc
->default_stream
;
1656 default_sinfo
.sinfo_flags
= asoc
->default_flags
;
1657 default_sinfo
.sinfo_ppid
= asoc
->default_ppid
;
1658 default_sinfo
.sinfo_context
= asoc
->default_context
;
1659 default_sinfo
.sinfo_timetolive
= asoc
->default_timetolive
;
1660 default_sinfo
.sinfo_assoc_id
= sctp_assoc2id(asoc
);
1661 sinfo
= &default_sinfo
;
1664 /* API 7.1.7, the sndbuf size per association bounds the
1665 * maximum size of data that can be sent in a single send call.
1667 if (msg_len
> sk
->sk_sndbuf
) {
1672 if (asoc
->pmtu_pending
)
1673 sctp_assoc_pending_pmtu(asoc
);
1675 /* If fragmentation is disabled and the message length exceeds the
1676 * association fragmentation point, return EMSGSIZE. The I-D
1677 * does not specify what this error is, but this looks like
1680 if (sctp_sk(sk
)->disable_fragments
&& (msg_len
> asoc
->frag_point
)) {
1686 /* Check for invalid stream. */
1687 if (sinfo
->sinfo_stream
>= asoc
->c
.sinit_num_ostreams
) {
1693 timeo
= sock_sndtimeo(sk
, msg
->msg_flags
& MSG_DONTWAIT
);
1694 if (!sctp_wspace(asoc
)) {
1695 err
= sctp_wait_for_sndbuf(asoc
, &timeo
, msg_len
);
1700 /* If an address is passed with the sendto/sendmsg call, it is used
1701 * to override the primary destination address in the TCP model, or
1702 * when SCTP_ADDR_OVER flag is set in the UDP model.
1704 if ((sctp_style(sk
, TCP
) && msg_name
) ||
1705 (sinfo_flags
& SCTP_ADDR_OVER
)) {
1706 chunk_tp
= sctp_assoc_lookup_paddr(asoc
, &to
);
1714 /* Auto-connect, if we aren't connected already. */
1715 if (sctp_state(asoc
, CLOSED
)) {
1716 err
= sctp_primitive_ASSOCIATE(asoc
, NULL
);
1719 SCTP_DEBUG_PRINTK("We associated primitively.\n");
1722 /* Break the message into multiple chunks of maximum size. */
1723 datamsg
= sctp_datamsg_from_user(asoc
, sinfo
, msg
, msg_len
);
1729 /* Now send the (possibly) fragmented message. */
1730 list_for_each(pos
, &datamsg
->chunks
) {
1731 chunk
= list_entry(pos
, struct sctp_chunk
, frag_list
);
1732 sctp_datamsg_track(chunk
);
1734 /* Do accounting for the write space. */
1735 sctp_set_owner_w(chunk
);
1737 chunk
->transport
= chunk_tp
;
1739 /* Send it to the lower layers. Note: all chunks
1740 * must either fail or succeed. The lower layer
1741 * works that way today. Keep it that way or this
1744 err
= sctp_primitive_SEND(asoc
, chunk
);
1745 /* Did the lower layer accept the chunk? */
1747 sctp_chunk_free(chunk
);
1748 SCTP_DEBUG_PRINTK("We sent primitively.\n");
1751 sctp_datamsg_free(datamsg
);
1757 /* If we are already past ASSOCIATE, the lower
1758 * layers are responsible for association cleanup.
1764 sctp_association_free(asoc
);
1766 sctp_release_sock(sk
);
1769 return sctp_error(sk
, msg_flags
, err
);
1776 err
= sock_error(sk
);
1786 /* This is an extended version of skb_pull() that removes the data from the
1787 * start of a skb even when data is spread across the list of skb's in the
1788 * frag_list. len specifies the total amount of data that needs to be removed.
1789 * when 'len' bytes could be removed from the skb, it returns 0.
1790 * If 'len' exceeds the total skb length, it returns the no. of bytes that
1791 * could not be removed.
1793 static int sctp_skb_pull(struct sk_buff
*skb
, int len
)
1795 struct sk_buff
*list
;
1796 int skb_len
= skb_headlen(skb
);
1799 if (len
<= skb_len
) {
1800 __skb_pull(skb
, len
);
1804 __skb_pull(skb
, skb_len
);
1806 for (list
= skb_shinfo(skb
)->frag_list
; list
; list
= list
->next
) {
1807 rlen
= sctp_skb_pull(list
, len
);
1808 skb
->len
-= (len
-rlen
);
1809 skb
->data_len
-= (len
-rlen
);
1820 /* API 3.1.3 recvmsg() - UDP Style Syntax
1822 * ssize_t recvmsg(int socket, struct msghdr *message,
1825 * socket - the socket descriptor of the endpoint.
1826 * message - pointer to the msghdr structure which contains a single
1827 * user message and possibly some ancillary data.
1829 * See Section 5 for complete description of the data
1832 * flags - flags sent or received with the user message, see Section
1833 * 5 for complete description of the flags.
1835 static struct sk_buff
*sctp_skb_recv_datagram(struct sock
*, int, int, int *);
1837 SCTP_STATIC
int sctp_recvmsg(struct kiocb
*iocb
, struct sock
*sk
,
1838 struct msghdr
*msg
, size_t len
, int noblock
,
1839 int flags
, int *addr_len
)
1841 struct sctp_ulpevent
*event
= NULL
;
1842 struct sctp_sock
*sp
= sctp_sk(sk
);
1843 struct sk_buff
*skb
;
1848 SCTP_DEBUG_PRINTK("sctp_recvmsg(%s: %p, %s: %p, %s: %zd, %s: %d, %s: "
1849 "0x%x, %s: %p)\n", "sk", sk
, "msghdr", msg
,
1850 "len", len
, "knoblauch", noblock
,
1851 "flags", flags
, "addr_len", addr_len
);
1855 if (sctp_style(sk
, TCP
) && !sctp_sstate(sk
, ESTABLISHED
)) {
1860 skb
= sctp_skb_recv_datagram(sk
, flags
, noblock
, &err
);
1864 /* Get the total length of the skb including any skb's in the
1873 err
= skb_copy_datagram_iovec(skb
, 0, msg
->msg_iov
, copied
);
1875 event
= sctp_skb2event(skb
);
1880 sock_recv_timestamp(msg
, sk
, skb
);
1881 if (sctp_ulpevent_is_notification(event
)) {
1882 msg
->msg_flags
|= MSG_NOTIFICATION
;
1883 sp
->pf
->event_msgname(event
, msg
->msg_name
, addr_len
);
1885 sp
->pf
->skb_msgname(skb
, msg
->msg_name
, addr_len
);
1888 /* Check if we allow SCTP_SNDRCVINFO. */
1889 if (sp
->subscribe
.sctp_data_io_event
)
1890 sctp_ulpevent_read_sndrcvinfo(event
, msg
);
1892 /* FIXME: we should be calling IP/IPv6 layers. */
1893 if (sk
->sk_protinfo
.af_inet
.cmsg_flags
)
1894 ip_cmsg_recv(msg
, skb
);
1899 /* If skb's length exceeds the user's buffer, update the skb and
1900 * push it back to the receive_queue so that the next call to
1901 * recvmsg() will return the remaining data. Don't set MSG_EOR.
1903 if (skb_len
> copied
) {
1904 msg
->msg_flags
&= ~MSG_EOR
;
1905 if (flags
& MSG_PEEK
)
1907 sctp_skb_pull(skb
, copied
);
1908 skb_queue_head(&sk
->sk_receive_queue
, skb
);
1910 /* When only partial message is copied to the user, increase
1911 * rwnd by that amount. If all the data in the skb is read,
1912 * rwnd is updated when the event is freed.
1914 if (!sctp_ulpevent_is_notification(event
))
1915 sctp_assoc_rwnd_increase(event
->asoc
, copied
);
1917 } else if ((event
->msg_flags
& MSG_NOTIFICATION
) ||
1918 (event
->msg_flags
& MSG_EOR
))
1919 msg
->msg_flags
|= MSG_EOR
;
1921 msg
->msg_flags
&= ~MSG_EOR
;
1924 if (flags
& MSG_PEEK
) {
1925 /* Release the skb reference acquired after peeking the skb in
1926 * sctp_skb_recv_datagram().
1930 /* Free the event which includes releasing the reference to
1931 * the owner of the skb, freeing the skb and updating the
1934 sctp_ulpevent_free(event
);
1937 sctp_release_sock(sk
);
1941 /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS)
1943 * This option is a on/off flag. If enabled no SCTP message
1944 * fragmentation will be performed. Instead if a message being sent
1945 * exceeds the current PMTU size, the message will NOT be sent and
1946 * instead a error will be indicated to the user.
1948 static int sctp_setsockopt_disable_fragments(struct sock
*sk
,
1949 char __user
*optval
, int optlen
)
1953 if (optlen
< sizeof(int))
1956 if (get_user(val
, (int __user
*)optval
))
1959 sctp_sk(sk
)->disable_fragments
= (val
== 0) ? 0 : 1;
1964 static int sctp_setsockopt_events(struct sock
*sk
, char __user
*optval
,
1967 if (optlen
!= sizeof(struct sctp_event_subscribe
))
1969 if (copy_from_user(&sctp_sk(sk
)->subscribe
, optval
, optlen
))
1974 /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE)
1976 * This socket option is applicable to the UDP-style socket only. When
1977 * set it will cause associations that are idle for more than the
1978 * specified number of seconds to automatically close. An association
1979 * being idle is defined an association that has NOT sent or received
1980 * user data. The special value of '0' indicates that no automatic
1981 * close of any associations should be performed. The option expects an
1982 * integer defining the number of seconds of idle time before an
1983 * association is closed.
1985 static int sctp_setsockopt_autoclose(struct sock
*sk
, char __user
*optval
,
1988 struct sctp_sock
*sp
= sctp_sk(sk
);
1990 /* Applicable to UDP-style socket only */
1991 if (sctp_style(sk
, TCP
))
1993 if (optlen
!= sizeof(int))
1995 if (copy_from_user(&sp
->autoclose
, optval
, optlen
))
2001 /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS)
2003 * Applications can enable or disable heartbeats for any peer address of
2004 * an association, modify an address's heartbeat interval, force a
2005 * heartbeat to be sent immediately, and adjust the address's maximum
2006 * number of retransmissions sent before an address is considered
2007 * unreachable. The following structure is used to access and modify an
2008 * address's parameters:
2010 * struct sctp_paddrparams {
2011 * sctp_assoc_t spp_assoc_id;
2012 * struct sockaddr_storage spp_address;
2013 * uint32_t spp_hbinterval;
2014 * uint16_t spp_pathmaxrxt;
2015 * uint32_t spp_pathmtu;
2016 * uint32_t spp_sackdelay;
2017 * uint32_t spp_flags;
2020 * spp_assoc_id - (one-to-many style socket) This is filled in the
2021 * application, and identifies the association for
2023 * spp_address - This specifies which address is of interest.
2024 * spp_hbinterval - This contains the value of the heartbeat interval,
2025 * in milliseconds. If a value of zero
2026 * is present in this field then no changes are to
2027 * be made to this parameter.
2028 * spp_pathmaxrxt - This contains the maximum number of
2029 * retransmissions before this address shall be
2030 * considered unreachable. If a value of zero
2031 * is present in this field then no changes are to
2032 * be made to this parameter.
2033 * spp_pathmtu - When Path MTU discovery is disabled the value
2034 * specified here will be the "fixed" path mtu.
2035 * Note that if the spp_address field is empty
2036 * then all associations on this address will
2037 * have this fixed path mtu set upon them.
2039 * spp_sackdelay - When delayed sack is enabled, this value specifies
2040 * the number of milliseconds that sacks will be delayed
2041 * for. This value will apply to all addresses of an
2042 * association if the spp_address field is empty. Note
2043 * also, that if delayed sack is enabled and this
2044 * value is set to 0, no change is made to the last
2045 * recorded delayed sack timer value.
2047 * spp_flags - These flags are used to control various features
2048 * on an association. The flag field may contain
2049 * zero or more of the following options.
2051 * SPP_HB_ENABLE - Enable heartbeats on the
2052 * specified address. Note that if the address
2053 * field is empty all addresses for the association
2054 * have heartbeats enabled upon them.
2056 * SPP_HB_DISABLE - Disable heartbeats on the
2057 * speicifed address. Note that if the address
2058 * field is empty all addresses for the association
2059 * will have their heartbeats disabled. Note also
2060 * that SPP_HB_ENABLE and SPP_HB_DISABLE are
2061 * mutually exclusive, only one of these two should
2062 * be specified. Enabling both fields will have
2063 * undetermined results.
2065 * SPP_HB_DEMAND - Request a user initiated heartbeat
2066 * to be made immediately.
2068 * SPP_HB_TIME_IS_ZERO - Specify's that the time for
2069 * heartbeat delayis to be set to the value of 0
2072 * SPP_PMTUD_ENABLE - This field will enable PMTU
2073 * discovery upon the specified address. Note that
2074 * if the address feild is empty then all addresses
2075 * on the association are effected.
2077 * SPP_PMTUD_DISABLE - This field will disable PMTU
2078 * discovery upon the specified address. Note that
2079 * if the address feild is empty then all addresses
2080 * on the association are effected. Not also that
2081 * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually
2082 * exclusive. Enabling both will have undetermined
2085 * SPP_SACKDELAY_ENABLE - Setting this flag turns
2086 * on delayed sack. The time specified in spp_sackdelay
2087 * is used to specify the sack delay for this address. Note
2088 * that if spp_address is empty then all addresses will
2089 * enable delayed sack and take on the sack delay
2090 * value specified in spp_sackdelay.
2091 * SPP_SACKDELAY_DISABLE - Setting this flag turns
2092 * off delayed sack. If the spp_address field is blank then
2093 * delayed sack is disabled for the entire association. Note
2094 * also that this field is mutually exclusive to
2095 * SPP_SACKDELAY_ENABLE, setting both will have undefined
2098 static int sctp_apply_peer_addr_params(struct sctp_paddrparams
*params
,
2099 struct sctp_transport
*trans
,
2100 struct sctp_association
*asoc
,
2101 struct sctp_sock
*sp
,
2104 int sackdelay_change
)
2108 if (params
->spp_flags
& SPP_HB_DEMAND
&& trans
) {
2109 error
= sctp_primitive_REQUESTHEARTBEAT (trans
->asoc
, trans
);
2114 /* Note that unless the spp_flag is set to SPP_HB_ENABLE the value of
2115 * this field is ignored. Note also that a value of zero indicates
2116 * the current setting should be left unchanged.
2118 if (params
->spp_flags
& SPP_HB_ENABLE
) {
2120 /* Re-zero the interval if the SPP_HB_TIME_IS_ZERO is
2121 * set. This lets us use 0 value when this flag
2124 if (params
->spp_flags
& SPP_HB_TIME_IS_ZERO
)
2125 params
->spp_hbinterval
= 0;
2127 if (params
->spp_hbinterval
||
2128 (params
->spp_flags
& SPP_HB_TIME_IS_ZERO
)) {
2131 msecs_to_jiffies(params
->spp_hbinterval
);
2134 msecs_to_jiffies(params
->spp_hbinterval
);
2136 sp
->hbinterval
= params
->spp_hbinterval
;
2143 trans
->param_flags
=
2144 (trans
->param_flags
& ~SPP_HB
) | hb_change
;
2147 (asoc
->param_flags
& ~SPP_HB
) | hb_change
;
2150 (sp
->param_flags
& ~SPP_HB
) | hb_change
;
2154 /* When Path MTU discovery is disabled the value specified here will
2155 * be the "fixed" path mtu (i.e. the value of the spp_flags field must
2156 * include the flag SPP_PMTUD_DISABLE for this field to have any
2159 if ((params
->spp_flags
& SPP_PMTUD_DISABLE
) && params
->spp_pathmtu
) {
2161 trans
->pathmtu
= params
->spp_pathmtu
;
2162 sctp_assoc_sync_pmtu(asoc
);
2164 asoc
->pathmtu
= params
->spp_pathmtu
;
2165 sctp_frag_point(sp
, params
->spp_pathmtu
);
2167 sp
->pathmtu
= params
->spp_pathmtu
;
2173 int update
= (trans
->param_flags
& SPP_PMTUD_DISABLE
) &&
2174 (params
->spp_flags
& SPP_PMTUD_ENABLE
);
2175 trans
->param_flags
=
2176 (trans
->param_flags
& ~SPP_PMTUD
) | pmtud_change
;
2178 sctp_transport_pmtu(trans
);
2179 sctp_assoc_sync_pmtu(asoc
);
2183 (asoc
->param_flags
& ~SPP_PMTUD
) | pmtud_change
;
2186 (sp
->param_flags
& ~SPP_PMTUD
) | pmtud_change
;
2190 /* Note that unless the spp_flag is set to SPP_SACKDELAY_ENABLE the
2191 * value of this field is ignored. Note also that a value of zero
2192 * indicates the current setting should be left unchanged.
2194 if ((params
->spp_flags
& SPP_SACKDELAY_ENABLE
) && params
->spp_sackdelay
) {
2197 msecs_to_jiffies(params
->spp_sackdelay
);
2200 msecs_to_jiffies(params
->spp_sackdelay
);
2202 sp
->sackdelay
= params
->spp_sackdelay
;
2206 if (sackdelay_change
) {
2208 trans
->param_flags
=
2209 (trans
->param_flags
& ~SPP_SACKDELAY
) |
2213 (asoc
->param_flags
& ~SPP_SACKDELAY
) |
2217 (sp
->param_flags
& ~SPP_SACKDELAY
) |
2222 /* Note that unless the spp_flag is set to SPP_PMTUD_ENABLE the value
2223 * of this field is ignored. Note also that a value of zero
2224 * indicates the current setting should be left unchanged.
2226 if ((params
->spp_flags
& SPP_PMTUD_ENABLE
) && params
->spp_pathmaxrxt
) {
2228 trans
->pathmaxrxt
= params
->spp_pathmaxrxt
;
2230 asoc
->pathmaxrxt
= params
->spp_pathmaxrxt
;
2232 sp
->pathmaxrxt
= params
->spp_pathmaxrxt
;
2239 static int sctp_setsockopt_peer_addr_params(struct sock
*sk
,
2240 char __user
*optval
, int optlen
)
2242 struct sctp_paddrparams params
;
2243 struct sctp_transport
*trans
= NULL
;
2244 struct sctp_association
*asoc
= NULL
;
2245 struct sctp_sock
*sp
= sctp_sk(sk
);
2247 int hb_change
, pmtud_change
, sackdelay_change
;
2249 if (optlen
!= sizeof(struct sctp_paddrparams
))
2252 if (copy_from_user(¶ms
, optval
, optlen
))
2255 /* Validate flags and value parameters. */
2256 hb_change
= params
.spp_flags
& SPP_HB
;
2257 pmtud_change
= params
.spp_flags
& SPP_PMTUD
;
2258 sackdelay_change
= params
.spp_flags
& SPP_SACKDELAY
;
2260 if (hb_change
== SPP_HB
||
2261 pmtud_change
== SPP_PMTUD
||
2262 sackdelay_change
== SPP_SACKDELAY
||
2263 params
.spp_sackdelay
> 500 ||
2265 && params
.spp_pathmtu
< SCTP_DEFAULT_MINSEGMENT
))
2268 /* If an address other than INADDR_ANY is specified, and
2269 * no transport is found, then the request is invalid.
2271 if (!sctp_is_any(( union sctp_addr
*)¶ms
.spp_address
)) {
2272 trans
= sctp_addr_id2transport(sk
, ¶ms
.spp_address
,
2273 params
.spp_assoc_id
);
2278 /* Get association, if assoc_id != 0 and the socket is a one
2279 * to many style socket, and an association was not found, then
2280 * the id was invalid.
2282 asoc
= sctp_id2assoc(sk
, params
.spp_assoc_id
);
2283 if (!asoc
&& params
.spp_assoc_id
&& sctp_style(sk
, UDP
))
2286 /* Heartbeat demand can only be sent on a transport or
2287 * association, but not a socket.
2289 if (params
.spp_flags
& SPP_HB_DEMAND
&& !trans
&& !asoc
)
2292 /* Process parameters. */
2293 error
= sctp_apply_peer_addr_params(¶ms
, trans
, asoc
, sp
,
2294 hb_change
, pmtud_change
,
2300 /* If changes are for association, also apply parameters to each
2303 if (!trans
&& asoc
) {
2304 struct list_head
*pos
;
2306 list_for_each(pos
, &asoc
->peer
.transport_addr_list
) {
2307 trans
= list_entry(pos
, struct sctp_transport
,
2309 sctp_apply_peer_addr_params(¶ms
, trans
, asoc
, sp
,
2310 hb_change
, pmtud_change
,
2318 /* 7.1.23. Delayed Ack Timer (SCTP_DELAYED_ACK_TIME)
2320 * This options will get or set the delayed ack timer. The time is set
2321 * in milliseconds. If the assoc_id is 0, then this sets or gets the
2322 * endpoints default delayed ack timer value. If the assoc_id field is
2323 * non-zero, then the set or get effects the specified association.
2325 * struct sctp_assoc_value {
2326 * sctp_assoc_t assoc_id;
2327 * uint32_t assoc_value;
2330 * assoc_id - This parameter, indicates which association the
2331 * user is preforming an action upon. Note that if
2332 * this field's value is zero then the endpoints
2333 * default value is changed (effecting future
2334 * associations only).
2336 * assoc_value - This parameter contains the number of milliseconds
2337 * that the user is requesting the delayed ACK timer
2338 * be set to. Note that this value is defined in
2339 * the standard to be between 200 and 500 milliseconds.
2341 * Note: a value of zero will leave the value alone,
2342 * but disable SACK delay. A non-zero value will also
2343 * enable SACK delay.
2346 static int sctp_setsockopt_delayed_ack_time(struct sock
*sk
,
2347 char __user
*optval
, int optlen
)
2349 struct sctp_assoc_value params
;
2350 struct sctp_transport
*trans
= NULL
;
2351 struct sctp_association
*asoc
= NULL
;
2352 struct sctp_sock
*sp
= sctp_sk(sk
);
2354 if (optlen
!= sizeof(struct sctp_assoc_value
))
2357 if (copy_from_user(¶ms
, optval
, optlen
))
2360 /* Validate value parameter. */
2361 if (params
.assoc_value
> 500)
2364 /* Get association, if assoc_id != 0 and the socket is a one
2365 * to many style socket, and an association was not found, then
2366 * the id was invalid.
2368 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
2369 if (!asoc
&& params
.assoc_id
&& sctp_style(sk
, UDP
))
2372 if (params
.assoc_value
) {
2375 msecs_to_jiffies(params
.assoc_value
);
2377 (asoc
->param_flags
& ~SPP_SACKDELAY
) |
2378 SPP_SACKDELAY_ENABLE
;
2380 sp
->sackdelay
= params
.assoc_value
;
2382 (sp
->param_flags
& ~SPP_SACKDELAY
) |
2383 SPP_SACKDELAY_ENABLE
;
2388 (asoc
->param_flags
& ~SPP_SACKDELAY
) |
2389 SPP_SACKDELAY_DISABLE
;
2392 (sp
->param_flags
& ~SPP_SACKDELAY
) |
2393 SPP_SACKDELAY_DISABLE
;
2397 /* If change is for association, also apply to each transport. */
2399 struct list_head
*pos
;
2401 list_for_each(pos
, &asoc
->peer
.transport_addr_list
) {
2402 trans
= list_entry(pos
, struct sctp_transport
,
2404 if (params
.assoc_value
) {
2406 msecs_to_jiffies(params
.assoc_value
);
2407 trans
->param_flags
=
2408 (trans
->param_flags
& ~SPP_SACKDELAY
) |
2409 SPP_SACKDELAY_ENABLE
;
2411 trans
->param_flags
=
2412 (trans
->param_flags
& ~SPP_SACKDELAY
) |
2413 SPP_SACKDELAY_DISABLE
;
2421 /* 7.1.3 Initialization Parameters (SCTP_INITMSG)
2423 * Applications can specify protocol parameters for the default association
2424 * initialization. The option name argument to setsockopt() and getsockopt()
2427 * Setting initialization parameters is effective only on an unconnected
2428 * socket (for UDP-style sockets only future associations are effected
2429 * by the change). With TCP-style sockets, this option is inherited by
2430 * sockets derived from a listener socket.
2432 static int sctp_setsockopt_initmsg(struct sock
*sk
, char __user
*optval
, int optlen
)
2434 struct sctp_initmsg sinit
;
2435 struct sctp_sock
*sp
= sctp_sk(sk
);
2437 if (optlen
!= sizeof(struct sctp_initmsg
))
2439 if (copy_from_user(&sinit
, optval
, optlen
))
2442 if (sinit
.sinit_num_ostreams
)
2443 sp
->initmsg
.sinit_num_ostreams
= sinit
.sinit_num_ostreams
;
2444 if (sinit
.sinit_max_instreams
)
2445 sp
->initmsg
.sinit_max_instreams
= sinit
.sinit_max_instreams
;
2446 if (sinit
.sinit_max_attempts
)
2447 sp
->initmsg
.sinit_max_attempts
= sinit
.sinit_max_attempts
;
2448 if (sinit
.sinit_max_init_timeo
)
2449 sp
->initmsg
.sinit_max_init_timeo
= sinit
.sinit_max_init_timeo
;
2455 * 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM)
2457 * Applications that wish to use the sendto() system call may wish to
2458 * specify a default set of parameters that would normally be supplied
2459 * through the inclusion of ancillary data. This socket option allows
2460 * such an application to set the default sctp_sndrcvinfo structure.
2461 * The application that wishes to use this socket option simply passes
2462 * in to this call the sctp_sndrcvinfo structure defined in Section
2463 * 5.2.2) The input parameters accepted by this call include
2464 * sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context,
2465 * sinfo_timetolive. The user must provide the sinfo_assoc_id field in
2466 * to this call if the caller is using the UDP model.
2468 static int sctp_setsockopt_default_send_param(struct sock
*sk
,
2469 char __user
*optval
, int optlen
)
2471 struct sctp_sndrcvinfo info
;
2472 struct sctp_association
*asoc
;
2473 struct sctp_sock
*sp
= sctp_sk(sk
);
2475 if (optlen
!= sizeof(struct sctp_sndrcvinfo
))
2477 if (copy_from_user(&info
, optval
, optlen
))
2480 asoc
= sctp_id2assoc(sk
, info
.sinfo_assoc_id
);
2481 if (!asoc
&& info
.sinfo_assoc_id
&& sctp_style(sk
, UDP
))
2485 asoc
->default_stream
= info
.sinfo_stream
;
2486 asoc
->default_flags
= info
.sinfo_flags
;
2487 asoc
->default_ppid
= info
.sinfo_ppid
;
2488 asoc
->default_context
= info
.sinfo_context
;
2489 asoc
->default_timetolive
= info
.sinfo_timetolive
;
2491 sp
->default_stream
= info
.sinfo_stream
;
2492 sp
->default_flags
= info
.sinfo_flags
;
2493 sp
->default_ppid
= info
.sinfo_ppid
;
2494 sp
->default_context
= info
.sinfo_context
;
2495 sp
->default_timetolive
= info
.sinfo_timetolive
;
2501 /* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
2503 * Requests that the local SCTP stack use the enclosed peer address as
2504 * the association primary. The enclosed address must be one of the
2505 * association peer's addresses.
2507 static int sctp_setsockopt_primary_addr(struct sock
*sk
, char __user
*optval
,
2510 struct sctp_prim prim
;
2511 struct sctp_transport
*trans
;
2513 if (optlen
!= sizeof(struct sctp_prim
))
2516 if (copy_from_user(&prim
, optval
, sizeof(struct sctp_prim
)))
2519 trans
= sctp_addr_id2transport(sk
, &prim
.ssp_addr
, prim
.ssp_assoc_id
);
2523 sctp_assoc_set_primary(trans
->asoc
, trans
);
2529 * 7.1.5 SCTP_NODELAY
2531 * Turn on/off any Nagle-like algorithm. This means that packets are
2532 * generally sent as soon as possible and no unnecessary delays are
2533 * introduced, at the cost of more packets in the network. Expects an
2534 * integer boolean flag.
2536 static int sctp_setsockopt_nodelay(struct sock
*sk
, char __user
*optval
,
2541 if (optlen
< sizeof(int))
2543 if (get_user(val
, (int __user
*)optval
))
2546 sctp_sk(sk
)->nodelay
= (val
== 0) ? 0 : 1;
2552 * 7.1.1 SCTP_RTOINFO
2554 * The protocol parameters used to initialize and bound retransmission
2555 * timeout (RTO) are tunable. sctp_rtoinfo structure is used to access
2556 * and modify these parameters.
2557 * All parameters are time values, in milliseconds. A value of 0, when
2558 * modifying the parameters, indicates that the current value should not
2562 static int sctp_setsockopt_rtoinfo(struct sock
*sk
, char __user
*optval
, int optlen
) {
2563 struct sctp_rtoinfo rtoinfo
;
2564 struct sctp_association
*asoc
;
2566 if (optlen
!= sizeof (struct sctp_rtoinfo
))
2569 if (copy_from_user(&rtoinfo
, optval
, optlen
))
2572 asoc
= sctp_id2assoc(sk
, rtoinfo
.srto_assoc_id
);
2574 /* Set the values to the specific association */
2575 if (!asoc
&& rtoinfo
.srto_assoc_id
&& sctp_style(sk
, UDP
))
2579 if (rtoinfo
.srto_initial
!= 0)
2581 msecs_to_jiffies(rtoinfo
.srto_initial
);
2582 if (rtoinfo
.srto_max
!= 0)
2583 asoc
->rto_max
= msecs_to_jiffies(rtoinfo
.srto_max
);
2584 if (rtoinfo
.srto_min
!= 0)
2585 asoc
->rto_min
= msecs_to_jiffies(rtoinfo
.srto_min
);
2587 /* If there is no association or the association-id = 0
2588 * set the values to the endpoint.
2590 struct sctp_sock
*sp
= sctp_sk(sk
);
2592 if (rtoinfo
.srto_initial
!= 0)
2593 sp
->rtoinfo
.srto_initial
= rtoinfo
.srto_initial
;
2594 if (rtoinfo
.srto_max
!= 0)
2595 sp
->rtoinfo
.srto_max
= rtoinfo
.srto_max
;
2596 if (rtoinfo
.srto_min
!= 0)
2597 sp
->rtoinfo
.srto_min
= rtoinfo
.srto_min
;
2605 * 7.1.2 SCTP_ASSOCINFO
2607 * This option is used to tune the maximum retransmission attempts
2608 * of the association.
2609 * Returns an error if the new association retransmission value is
2610 * greater than the sum of the retransmission value of the peer.
2611 * See [SCTP] for more information.
2614 static int sctp_setsockopt_associnfo(struct sock
*sk
, char __user
*optval
, int optlen
)
2617 struct sctp_assocparams assocparams
;
2618 struct sctp_association
*asoc
;
2620 if (optlen
!= sizeof(struct sctp_assocparams
))
2622 if (copy_from_user(&assocparams
, optval
, optlen
))
2625 asoc
= sctp_id2assoc(sk
, assocparams
.sasoc_assoc_id
);
2627 if (!asoc
&& assocparams
.sasoc_assoc_id
&& sctp_style(sk
, UDP
))
2630 /* Set the values to the specific association */
2632 if (assocparams
.sasoc_asocmaxrxt
!= 0) {
2635 struct list_head
*pos
;
2636 struct sctp_transport
*peer_addr
;
2638 list_for_each(pos
, &asoc
->peer
.transport_addr_list
) {
2639 peer_addr
= list_entry(pos
,
2640 struct sctp_transport
,
2642 path_sum
+= peer_addr
->pathmaxrxt
;
2646 /* Only validate asocmaxrxt if we have more then
2647 * one path/transport. We do this because path
2648 * retransmissions are only counted when we have more
2652 assocparams
.sasoc_asocmaxrxt
> path_sum
)
2655 asoc
->max_retrans
= assocparams
.sasoc_asocmaxrxt
;
2658 if (assocparams
.sasoc_cookie_life
!= 0) {
2659 asoc
->cookie_life
.tv_sec
=
2660 assocparams
.sasoc_cookie_life
/ 1000;
2661 asoc
->cookie_life
.tv_usec
=
2662 (assocparams
.sasoc_cookie_life
% 1000)
2666 /* Set the values to the endpoint */
2667 struct sctp_sock
*sp
= sctp_sk(sk
);
2669 if (assocparams
.sasoc_asocmaxrxt
!= 0)
2670 sp
->assocparams
.sasoc_asocmaxrxt
=
2671 assocparams
.sasoc_asocmaxrxt
;
2672 if (assocparams
.sasoc_cookie_life
!= 0)
2673 sp
->assocparams
.sasoc_cookie_life
=
2674 assocparams
.sasoc_cookie_life
;
2680 * 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR)
2682 * This socket option is a boolean flag which turns on or off mapped V4
2683 * addresses. If this option is turned on and the socket is type
2684 * PF_INET6, then IPv4 addresses will be mapped to V6 representation.
2685 * If this option is turned off, then no mapping will be done of V4
2686 * addresses and a user will receive both PF_INET6 and PF_INET type
2687 * addresses on the socket.
2689 static int sctp_setsockopt_mappedv4(struct sock
*sk
, char __user
*optval
, int optlen
)
2692 struct sctp_sock
*sp
= sctp_sk(sk
);
2694 if (optlen
< sizeof(int))
2696 if (get_user(val
, (int __user
*)optval
))
2707 * 7.1.17 Set the maximum fragrmentation size (SCTP_MAXSEG)
2709 * This socket option specifies the maximum size to put in any outgoing
2710 * SCTP chunk. If a message is larger than this size it will be
2711 * fragmented by SCTP into the specified size. Note that the underlying
2712 * SCTP implementation may fragment into smaller sized chunks when the
2713 * PMTU of the underlying association is smaller than the value set by
2716 static int sctp_setsockopt_maxseg(struct sock
*sk
, char __user
*optval
, int optlen
)
2718 struct sctp_association
*asoc
;
2719 struct list_head
*pos
;
2720 struct sctp_sock
*sp
= sctp_sk(sk
);
2723 if (optlen
< sizeof(int))
2725 if (get_user(val
, (int __user
*)optval
))
2727 if ((val
!= 0) && ((val
< 8) || (val
> SCTP_MAX_CHUNK_LEN
)))
2729 sp
->user_frag
= val
;
2731 /* Update the frag_point of the existing associations. */
2732 list_for_each(pos
, &(sp
->ep
->asocs
)) {
2733 asoc
= list_entry(pos
, struct sctp_association
, asocs
);
2734 asoc
->frag_point
= sctp_frag_point(sp
, asoc
->pathmtu
);
2742 * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR)
2744 * Requests that the peer mark the enclosed address as the association
2745 * primary. The enclosed address must be one of the association's
2746 * locally bound addresses. The following structure is used to make a
2747 * set primary request:
2749 static int sctp_setsockopt_peer_primary_addr(struct sock
*sk
, char __user
*optval
,
2752 struct sctp_sock
*sp
;
2753 struct sctp_endpoint
*ep
;
2754 struct sctp_association
*asoc
= NULL
;
2755 struct sctp_setpeerprim prim
;
2756 struct sctp_chunk
*chunk
;
2762 if (!sctp_addip_enable
)
2765 if (optlen
!= sizeof(struct sctp_setpeerprim
))
2768 if (copy_from_user(&prim
, optval
, optlen
))
2771 asoc
= sctp_id2assoc(sk
, prim
.sspp_assoc_id
);
2775 if (!asoc
->peer
.asconf_capable
)
2778 if (asoc
->peer
.addip_disabled_mask
& SCTP_PARAM_SET_PRIMARY
)
2781 if (!sctp_state(asoc
, ESTABLISHED
))
2784 if (!sctp_assoc_lookup_laddr(asoc
, (union sctp_addr
*)&prim
.sspp_addr
))
2785 return -EADDRNOTAVAIL
;
2787 /* Create an ASCONF chunk with SET_PRIMARY parameter */
2788 chunk
= sctp_make_asconf_set_prim(asoc
,
2789 (union sctp_addr
*)&prim
.sspp_addr
);
2793 err
= sctp_send_asconf(asoc
, chunk
);
2795 SCTP_DEBUG_PRINTK("We set peer primary addr primitively.\n");
2800 static int sctp_setsockopt_adaptation_layer(struct sock
*sk
, char __user
*optval
,
2803 struct sctp_setadaptation adaptation
;
2805 if (optlen
!= sizeof(struct sctp_setadaptation
))
2807 if (copy_from_user(&adaptation
, optval
, optlen
))
2810 sctp_sk(sk
)->adaptation_ind
= adaptation
.ssb_adaptation_ind
;
2816 * 7.1.29. Set or Get the default context (SCTP_CONTEXT)
2818 * The context field in the sctp_sndrcvinfo structure is normally only
2819 * used when a failed message is retrieved holding the value that was
2820 * sent down on the actual send call. This option allows the setting of
2821 * a default context on an association basis that will be received on
2822 * reading messages from the peer. This is especially helpful in the
2823 * one-2-many model for an application to keep some reference to an
2824 * internal state machine that is processing messages on the
2825 * association. Note that the setting of this value only effects
2826 * received messages from the peer and does not effect the value that is
2827 * saved with outbound messages.
2829 static int sctp_setsockopt_context(struct sock
*sk
, char __user
*optval
,
2832 struct sctp_assoc_value params
;
2833 struct sctp_sock
*sp
;
2834 struct sctp_association
*asoc
;
2836 if (optlen
!= sizeof(struct sctp_assoc_value
))
2838 if (copy_from_user(¶ms
, optval
, optlen
))
2843 if (params
.assoc_id
!= 0) {
2844 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
2847 asoc
->default_rcv_context
= params
.assoc_value
;
2849 sp
->default_rcv_context
= params
.assoc_value
;
2856 * 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE)
2858 * This options will at a minimum specify if the implementation is doing
2859 * fragmented interleave. Fragmented interleave, for a one to many
2860 * socket, is when subsequent calls to receive a message may return
2861 * parts of messages from different associations. Some implementations
2862 * may allow you to turn this value on or off. If so, when turned off,
2863 * no fragment interleave will occur (which will cause a head of line
2864 * blocking amongst multiple associations sharing the same one to many
2865 * socket). When this option is turned on, then each receive call may
2866 * come from a different association (thus the user must receive data
2867 * with the extended calls (e.g. sctp_recvmsg) to keep track of which
2868 * association each receive belongs to.
2870 * This option takes a boolean value. A non-zero value indicates that
2871 * fragmented interleave is on. A value of zero indicates that
2872 * fragmented interleave is off.
2874 * Note that it is important that an implementation that allows this
2875 * option to be turned on, have it off by default. Otherwise an unaware
2876 * application using the one to many model may become confused and act
2879 static int sctp_setsockopt_fragment_interleave(struct sock
*sk
,
2880 char __user
*optval
,
2885 if (optlen
!= sizeof(int))
2887 if (get_user(val
, (int __user
*)optval
))
2890 sctp_sk(sk
)->frag_interleave
= (val
== 0) ? 0 : 1;
2896 * 7.1.25. Set or Get the sctp partial delivery point
2897 * (SCTP_PARTIAL_DELIVERY_POINT)
2898 * This option will set or get the SCTP partial delivery point. This
2899 * point is the size of a message where the partial delivery API will be
2900 * invoked to help free up rwnd space for the peer. Setting this to a
2901 * lower value will cause partial delivery's to happen more often. The
2902 * calls argument is an integer that sets or gets the partial delivery
2905 static int sctp_setsockopt_partial_delivery_point(struct sock
*sk
,
2906 char __user
*optval
,
2911 if (optlen
!= sizeof(u32
))
2913 if (get_user(val
, (int __user
*)optval
))
2916 sctp_sk(sk
)->pd_point
= val
;
2918 return 0; /* is this the right error code? */
2922 * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST)
2924 * This option will allow a user to change the maximum burst of packets
2925 * that can be emitted by this association. Note that the default value
2926 * is 4, and some implementations may restrict this setting so that it
2927 * can only be lowered.
2929 * NOTE: This text doesn't seem right. Do this on a socket basis with
2930 * future associations inheriting the socket value.
2932 static int sctp_setsockopt_maxburst(struct sock
*sk
,
2933 char __user
*optval
,
2938 if (optlen
!= sizeof(int))
2940 if (get_user(val
, (int __user
*)optval
))
2946 sctp_sk(sk
)->max_burst
= val
;
2952 * 7.1.18. Add a chunk that must be authenticated (SCTP_AUTH_CHUNK)
2954 * This set option adds a chunk type that the user is requesting to be
2955 * received only in an authenticated way. Changes to the list of chunks
2956 * will only effect future associations on the socket.
2958 static int sctp_setsockopt_auth_chunk(struct sock
*sk
,
2959 char __user
*optval
,
2962 struct sctp_authchunk val
;
2964 if (optlen
!= sizeof(struct sctp_authchunk
))
2966 if (copy_from_user(&val
, optval
, optlen
))
2969 switch (val
.sauth_chunk
) {
2971 case SCTP_CID_INIT_ACK
:
2972 case SCTP_CID_SHUTDOWN_COMPLETE
:
2977 /* add this chunk id to the endpoint */
2978 return sctp_auth_ep_add_chunkid(sctp_sk(sk
)->ep
, val
.sauth_chunk
);
2982 * 7.1.19. Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT)
2984 * This option gets or sets the list of HMAC algorithms that the local
2985 * endpoint requires the peer to use.
2987 static int sctp_setsockopt_hmac_ident(struct sock
*sk
,
2988 char __user
*optval
,
2991 struct sctp_hmacalgo
*hmacs
;
2994 if (optlen
< sizeof(struct sctp_hmacalgo
))
2997 hmacs
= kmalloc(optlen
, GFP_KERNEL
);
3001 if (copy_from_user(hmacs
, optval
, optlen
)) {
3006 if (hmacs
->shmac_num_idents
== 0 ||
3007 hmacs
->shmac_num_idents
> SCTP_AUTH_NUM_HMACS
) {
3012 err
= sctp_auth_ep_set_hmacs(sctp_sk(sk
)->ep
, hmacs
);
3019 * 7.1.20. Set a shared key (SCTP_AUTH_KEY)
3021 * This option will set a shared secret key which is used to build an
3022 * association shared key.
3024 static int sctp_setsockopt_auth_key(struct sock
*sk
,
3025 char __user
*optval
,
3028 struct sctp_authkey
*authkey
;
3029 struct sctp_association
*asoc
;
3032 if (optlen
<= sizeof(struct sctp_authkey
))
3035 authkey
= kmalloc(optlen
, GFP_KERNEL
);
3039 if (copy_from_user(authkey
, optval
, optlen
)) {
3044 asoc
= sctp_id2assoc(sk
, authkey
->sca_assoc_id
);
3045 if (!asoc
&& authkey
->sca_assoc_id
&& sctp_style(sk
, UDP
)) {
3050 ret
= sctp_auth_set_key(sctp_sk(sk
)->ep
, asoc
, authkey
);
3057 * 7.1.21. Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY)
3059 * This option will get or set the active shared key to be used to build
3060 * the association shared key.
3062 static int sctp_setsockopt_active_key(struct sock
*sk
,
3063 char __user
*optval
,
3066 struct sctp_authkeyid val
;
3067 struct sctp_association
*asoc
;
3069 if (optlen
!= sizeof(struct sctp_authkeyid
))
3071 if (copy_from_user(&val
, optval
, optlen
))
3074 asoc
= sctp_id2assoc(sk
, val
.scact_assoc_id
);
3075 if (!asoc
&& val
.scact_assoc_id
&& sctp_style(sk
, UDP
))
3078 return sctp_auth_set_active_key(sctp_sk(sk
)->ep
, asoc
,
3079 val
.scact_keynumber
);
3083 * 7.1.22. Delete a shared key (SCTP_AUTH_DELETE_KEY)
3085 * This set option will delete a shared secret key from use.
3087 static int sctp_setsockopt_del_key(struct sock
*sk
,
3088 char __user
*optval
,
3091 struct sctp_authkeyid val
;
3092 struct sctp_association
*asoc
;
3094 if (optlen
!= sizeof(struct sctp_authkeyid
))
3096 if (copy_from_user(&val
, optval
, optlen
))
3099 asoc
= sctp_id2assoc(sk
, val
.scact_assoc_id
);
3100 if (!asoc
&& val
.scact_assoc_id
&& sctp_style(sk
, UDP
))
3103 return sctp_auth_del_key_id(sctp_sk(sk
)->ep
, asoc
,
3104 val
.scact_keynumber
);
3109 /* API 6.2 setsockopt(), getsockopt()
3111 * Applications use setsockopt() and getsockopt() to set or retrieve
3112 * socket options. Socket options are used to change the default
3113 * behavior of sockets calls. They are described in Section 7.
3117 * ret = getsockopt(int sd, int level, int optname, void __user *optval,
3118 * int __user *optlen);
3119 * ret = setsockopt(int sd, int level, int optname, const void __user *optval,
3122 * sd - the socket descript.
3123 * level - set to IPPROTO_SCTP for all SCTP options.
3124 * optname - the option name.
3125 * optval - the buffer to store the value of the option.
3126 * optlen - the size of the buffer.
3128 SCTP_STATIC
int sctp_setsockopt(struct sock
*sk
, int level
, int optname
,
3129 char __user
*optval
, int optlen
)
3133 SCTP_DEBUG_PRINTK("sctp_setsockopt(sk: %p... optname: %d)\n",
3136 /* I can hardly begin to describe how wrong this is. This is
3137 * so broken as to be worse than useless. The API draft
3138 * REALLY is NOT helpful here... I am not convinced that the
3139 * semantics of setsockopt() with a level OTHER THAN SOL_SCTP
3140 * are at all well-founded.
3142 if (level
!= SOL_SCTP
) {
3143 struct sctp_af
*af
= sctp_sk(sk
)->pf
->af
;
3144 retval
= af
->setsockopt(sk
, level
, optname
, optval
, optlen
);
3151 case SCTP_SOCKOPT_BINDX_ADD
:
3152 /* 'optlen' is the size of the addresses buffer. */
3153 retval
= sctp_setsockopt_bindx(sk
, (struct sockaddr __user
*)optval
,
3154 optlen
, SCTP_BINDX_ADD_ADDR
);
3157 case SCTP_SOCKOPT_BINDX_REM
:
3158 /* 'optlen' is the size of the addresses buffer. */
3159 retval
= sctp_setsockopt_bindx(sk
, (struct sockaddr __user
*)optval
,
3160 optlen
, SCTP_BINDX_REM_ADDR
);
3163 case SCTP_SOCKOPT_CONNECTX
:
3164 /* 'optlen' is the size of the addresses buffer. */
3165 retval
= sctp_setsockopt_connectx(sk
, (struct sockaddr __user
*)optval
,
3169 case SCTP_DISABLE_FRAGMENTS
:
3170 retval
= sctp_setsockopt_disable_fragments(sk
, optval
, optlen
);
3174 retval
= sctp_setsockopt_events(sk
, optval
, optlen
);
3177 case SCTP_AUTOCLOSE
:
3178 retval
= sctp_setsockopt_autoclose(sk
, optval
, optlen
);
3181 case SCTP_PEER_ADDR_PARAMS
:
3182 retval
= sctp_setsockopt_peer_addr_params(sk
, optval
, optlen
);
3185 case SCTP_DELAYED_ACK_TIME
:
3186 retval
= sctp_setsockopt_delayed_ack_time(sk
, optval
, optlen
);
3188 case SCTP_PARTIAL_DELIVERY_POINT
:
3189 retval
= sctp_setsockopt_partial_delivery_point(sk
, optval
, optlen
);
3193 retval
= sctp_setsockopt_initmsg(sk
, optval
, optlen
);
3195 case SCTP_DEFAULT_SEND_PARAM
:
3196 retval
= sctp_setsockopt_default_send_param(sk
, optval
,
3199 case SCTP_PRIMARY_ADDR
:
3200 retval
= sctp_setsockopt_primary_addr(sk
, optval
, optlen
);
3202 case SCTP_SET_PEER_PRIMARY_ADDR
:
3203 retval
= sctp_setsockopt_peer_primary_addr(sk
, optval
, optlen
);
3206 retval
= sctp_setsockopt_nodelay(sk
, optval
, optlen
);
3209 retval
= sctp_setsockopt_rtoinfo(sk
, optval
, optlen
);
3211 case SCTP_ASSOCINFO
:
3212 retval
= sctp_setsockopt_associnfo(sk
, optval
, optlen
);
3214 case SCTP_I_WANT_MAPPED_V4_ADDR
:
3215 retval
= sctp_setsockopt_mappedv4(sk
, optval
, optlen
);
3218 retval
= sctp_setsockopt_maxseg(sk
, optval
, optlen
);
3220 case SCTP_ADAPTATION_LAYER
:
3221 retval
= sctp_setsockopt_adaptation_layer(sk
, optval
, optlen
);
3224 retval
= sctp_setsockopt_context(sk
, optval
, optlen
);
3226 case SCTP_FRAGMENT_INTERLEAVE
:
3227 retval
= sctp_setsockopt_fragment_interleave(sk
, optval
, optlen
);
3229 case SCTP_MAX_BURST
:
3230 retval
= sctp_setsockopt_maxburst(sk
, optval
, optlen
);
3232 case SCTP_AUTH_CHUNK
:
3233 retval
= sctp_setsockopt_auth_chunk(sk
, optval
, optlen
);
3235 case SCTP_HMAC_IDENT
:
3236 retval
= sctp_setsockopt_hmac_ident(sk
, optval
, optlen
);
3239 retval
= sctp_setsockopt_auth_key(sk
, optval
, optlen
);
3241 case SCTP_AUTH_ACTIVE_KEY
:
3242 retval
= sctp_setsockopt_active_key(sk
, optval
, optlen
);
3244 case SCTP_AUTH_DELETE_KEY
:
3245 retval
= sctp_setsockopt_del_key(sk
, optval
, optlen
);
3248 retval
= -ENOPROTOOPT
;
3252 sctp_release_sock(sk
);
3258 /* API 3.1.6 connect() - UDP Style Syntax
3260 * An application may use the connect() call in the UDP model to initiate an
3261 * association without sending data.
3265 * ret = connect(int sd, const struct sockaddr *nam, socklen_t len);
3267 * sd: the socket descriptor to have a new association added to.
3269 * nam: the address structure (either struct sockaddr_in or struct
3270 * sockaddr_in6 defined in RFC2553 [7]).
3272 * len: the size of the address.
3274 SCTP_STATIC
int sctp_connect(struct sock
*sk
, struct sockaddr
*addr
,
3282 SCTP_DEBUG_PRINTK("%s - sk: %p, sockaddr: %p, addr_len: %d\n",
3283 __FUNCTION__
, sk
, addr
, addr_len
);
3285 /* Validate addr_len before calling common connect/connectx routine. */
3286 af
= sctp_get_af_specific(addr
->sa_family
);
3287 if (!af
|| addr_len
< af
->sockaddr_len
) {
3290 /* Pass correct addr len to common routine (so it knows there
3291 * is only one address being passed.
3293 err
= __sctp_connect(sk
, addr
, af
->sockaddr_len
);
3296 sctp_release_sock(sk
);
3300 /* FIXME: Write comments. */
3301 SCTP_STATIC
int sctp_disconnect(struct sock
*sk
, int flags
)
3303 return -EOPNOTSUPP
; /* STUB */
3306 /* 4.1.4 accept() - TCP Style Syntax
3308 * Applications use accept() call to remove an established SCTP
3309 * association from the accept queue of the endpoint. A new socket
3310 * descriptor will be returned from accept() to represent the newly
3311 * formed association.
3313 SCTP_STATIC
struct sock
*sctp_accept(struct sock
*sk
, int flags
, int *err
)
3315 struct sctp_sock
*sp
;
3316 struct sctp_endpoint
*ep
;
3317 struct sock
*newsk
= NULL
;
3318 struct sctp_association
*asoc
;
3327 if (!sctp_style(sk
, TCP
)) {
3328 error
= -EOPNOTSUPP
;
3332 if (!sctp_sstate(sk
, LISTENING
)) {
3337 timeo
= sock_rcvtimeo(sk
, flags
& O_NONBLOCK
);
3339 error
= sctp_wait_for_accept(sk
, timeo
);
3343 /* We treat the list of associations on the endpoint as the accept
3344 * queue and pick the first association on the list.
3346 asoc
= list_entry(ep
->asocs
.next
, struct sctp_association
, asocs
);
3348 newsk
= sp
->pf
->create_accept_sk(sk
, asoc
);
3354 /* Populate the fields of the newsk from the oldsk and migrate the
3355 * asoc to the newsk.
3357 sctp_sock_migrate(sk
, newsk
, asoc
, SCTP_SOCKET_TCP
);
3360 sctp_release_sock(sk
);
3365 /* The SCTP ioctl handler. */
3366 SCTP_STATIC
int sctp_ioctl(struct sock
*sk
, int cmd
, unsigned long arg
)
3368 return -ENOIOCTLCMD
;
3371 /* This is the function which gets called during socket creation to
3372 * initialized the SCTP-specific portion of the sock.
3373 * The sock structure should already be zero-filled memory.
3375 SCTP_STATIC
int sctp_init_sock(struct sock
*sk
)
3377 struct sctp_endpoint
*ep
;
3378 struct sctp_sock
*sp
;
3380 SCTP_DEBUG_PRINTK("sctp_init_sock(sk: %p)\n", sk
);
3384 /* Initialize the SCTP per socket area. */
3385 switch (sk
->sk_type
) {
3386 case SOCK_SEQPACKET
:
3387 sp
->type
= SCTP_SOCKET_UDP
;
3390 sp
->type
= SCTP_SOCKET_TCP
;
3393 return -ESOCKTNOSUPPORT
;
3396 /* Initialize default send parameters. These parameters can be
3397 * modified with the SCTP_DEFAULT_SEND_PARAM socket option.
3399 sp
->default_stream
= 0;
3400 sp
->default_ppid
= 0;
3401 sp
->default_flags
= 0;
3402 sp
->default_context
= 0;
3403 sp
->default_timetolive
= 0;
3405 sp
->default_rcv_context
= 0;
3406 sp
->max_burst
= sctp_max_burst
;
3408 /* Initialize default setup parameters. These parameters
3409 * can be modified with the SCTP_INITMSG socket option or
3410 * overridden by the SCTP_INIT CMSG.
3412 sp
->initmsg
.sinit_num_ostreams
= sctp_max_outstreams
;
3413 sp
->initmsg
.sinit_max_instreams
= sctp_max_instreams
;
3414 sp
->initmsg
.sinit_max_attempts
= sctp_max_retrans_init
;
3415 sp
->initmsg
.sinit_max_init_timeo
= sctp_rto_max
;
3417 /* Initialize default RTO related parameters. These parameters can
3418 * be modified for with the SCTP_RTOINFO socket option.
3420 sp
->rtoinfo
.srto_initial
= sctp_rto_initial
;
3421 sp
->rtoinfo
.srto_max
= sctp_rto_max
;
3422 sp
->rtoinfo
.srto_min
= sctp_rto_min
;
3424 /* Initialize default association related parameters. These parameters
3425 * can be modified with the SCTP_ASSOCINFO socket option.
3427 sp
->assocparams
.sasoc_asocmaxrxt
= sctp_max_retrans_association
;
3428 sp
->assocparams
.sasoc_number_peer_destinations
= 0;
3429 sp
->assocparams
.sasoc_peer_rwnd
= 0;
3430 sp
->assocparams
.sasoc_local_rwnd
= 0;
3431 sp
->assocparams
.sasoc_cookie_life
= sctp_valid_cookie_life
;
3433 /* Initialize default event subscriptions. By default, all the
3436 memset(&sp
->subscribe
, 0, sizeof(struct sctp_event_subscribe
));
3438 /* Default Peer Address Parameters. These defaults can
3439 * be modified via SCTP_PEER_ADDR_PARAMS
3441 sp
->hbinterval
= sctp_hb_interval
;
3442 sp
->pathmaxrxt
= sctp_max_retrans_path
;
3443 sp
->pathmtu
= 0; // allow default discovery
3444 sp
->sackdelay
= sctp_sack_timeout
;
3445 sp
->param_flags
= SPP_HB_ENABLE
|
3447 SPP_SACKDELAY_ENABLE
;
3449 /* If enabled no SCTP message fragmentation will be performed.
3450 * Configure through SCTP_DISABLE_FRAGMENTS socket option.
3452 sp
->disable_fragments
= 0;
3454 /* Enable Nagle algorithm by default. */
3457 /* Enable by default. */
3460 /* Auto-close idle associations after the configured
3461 * number of seconds. A value of 0 disables this
3462 * feature. Configure through the SCTP_AUTOCLOSE socket option,
3463 * for UDP-style sockets only.
3467 /* User specified fragmentation limit. */
3470 sp
->adaptation_ind
= 0;
3472 sp
->pf
= sctp_get_pf_specific(sk
->sk_family
);
3474 /* Control variables for partial data delivery. */
3475 atomic_set(&sp
->pd_mode
, 0);
3476 skb_queue_head_init(&sp
->pd_lobby
);
3477 sp
->frag_interleave
= 0;
3479 /* Create a per socket endpoint structure. Even if we
3480 * change the data structure relationships, this may still
3481 * be useful for storing pre-connect address information.
3483 ep
= sctp_endpoint_new(sk
, GFP_KERNEL
);
3490 SCTP_DBG_OBJCNT_INC(sock
);
3491 atomic_inc(&sctp_sockets_allocated
);
3495 /* Cleanup any SCTP per socket resources. */
3496 SCTP_STATIC
int sctp_destroy_sock(struct sock
*sk
)
3498 struct sctp_endpoint
*ep
;
3500 SCTP_DEBUG_PRINTK("sctp_destroy_sock(sk: %p)\n", sk
);
3502 /* Release our hold on the endpoint. */
3503 ep
= sctp_sk(sk
)->ep
;
3504 sctp_endpoint_free(ep
);
3505 atomic_dec(&sctp_sockets_allocated
);
3509 /* API 4.1.7 shutdown() - TCP Style Syntax
3510 * int shutdown(int socket, int how);
3512 * sd - the socket descriptor of the association to be closed.
3513 * how - Specifies the type of shutdown. The values are
3516 * Disables further receive operations. No SCTP
3517 * protocol action is taken.
3519 * Disables further send operations, and initiates
3520 * the SCTP shutdown sequence.
3522 * Disables further send and receive operations
3523 * and initiates the SCTP shutdown sequence.
3525 SCTP_STATIC
void sctp_shutdown(struct sock
*sk
, int how
)
3527 struct sctp_endpoint
*ep
;
3528 struct sctp_association
*asoc
;
3530 if (!sctp_style(sk
, TCP
))
3533 if (how
& SEND_SHUTDOWN
) {
3534 ep
= sctp_sk(sk
)->ep
;
3535 if (!list_empty(&ep
->asocs
)) {
3536 asoc
= list_entry(ep
->asocs
.next
,
3537 struct sctp_association
, asocs
);
3538 sctp_primitive_SHUTDOWN(asoc
, NULL
);
3543 /* 7.2.1 Association Status (SCTP_STATUS)
3545 * Applications can retrieve current status information about an
3546 * association, including association state, peer receiver window size,
3547 * number of unacked data chunks, and number of data chunks pending
3548 * receipt. This information is read-only.
3550 static int sctp_getsockopt_sctp_status(struct sock
*sk
, int len
,
3551 char __user
*optval
,
3554 struct sctp_status status
;
3555 struct sctp_association
*asoc
= NULL
;
3556 struct sctp_transport
*transport
;
3557 sctp_assoc_t associd
;
3560 if (len
< sizeof(status
)) {
3565 len
= sizeof(status
);
3566 if (copy_from_user(&status
, optval
, len
)) {
3571 associd
= status
.sstat_assoc_id
;
3572 asoc
= sctp_id2assoc(sk
, associd
);
3578 transport
= asoc
->peer
.primary_path
;
3580 status
.sstat_assoc_id
= sctp_assoc2id(asoc
);
3581 status
.sstat_state
= asoc
->state
;
3582 status
.sstat_rwnd
= asoc
->peer
.rwnd
;
3583 status
.sstat_unackdata
= asoc
->unack_data
;
3585 status
.sstat_penddata
= sctp_tsnmap_pending(&asoc
->peer
.tsn_map
);
3586 status
.sstat_instrms
= asoc
->c
.sinit_max_instreams
;
3587 status
.sstat_outstrms
= asoc
->c
.sinit_num_ostreams
;
3588 status
.sstat_fragmentation_point
= asoc
->frag_point
;
3589 status
.sstat_primary
.spinfo_assoc_id
= sctp_assoc2id(transport
->asoc
);
3590 memcpy(&status
.sstat_primary
.spinfo_address
, &transport
->ipaddr
,
3591 transport
->af_specific
->sockaddr_len
);
3592 /* Map ipv4 address into v4-mapped-on-v6 address. */
3593 sctp_get_pf_specific(sk
->sk_family
)->addr_v4map(sctp_sk(sk
),
3594 (union sctp_addr
*)&status
.sstat_primary
.spinfo_address
);
3595 status
.sstat_primary
.spinfo_state
= transport
->state
;
3596 status
.sstat_primary
.spinfo_cwnd
= transport
->cwnd
;
3597 status
.sstat_primary
.spinfo_srtt
= transport
->srtt
;
3598 status
.sstat_primary
.spinfo_rto
= jiffies_to_msecs(transport
->rto
);
3599 status
.sstat_primary
.spinfo_mtu
= transport
->pathmtu
;
3601 if (status
.sstat_primary
.spinfo_state
== SCTP_UNKNOWN
)
3602 status
.sstat_primary
.spinfo_state
= SCTP_ACTIVE
;
3604 if (put_user(len
, optlen
)) {
3609 SCTP_DEBUG_PRINTK("sctp_getsockopt_sctp_status(%d): %d %d %d\n",
3610 len
, status
.sstat_state
, status
.sstat_rwnd
,
3611 status
.sstat_assoc_id
);
3613 if (copy_to_user(optval
, &status
, len
)) {
3623 /* 7.2.2 Peer Address Information (SCTP_GET_PEER_ADDR_INFO)
3625 * Applications can retrieve information about a specific peer address
3626 * of an association, including its reachability state, congestion
3627 * window, and retransmission timer values. This information is
3630 static int sctp_getsockopt_peer_addr_info(struct sock
*sk
, int len
,
3631 char __user
*optval
,
3634 struct sctp_paddrinfo pinfo
;
3635 struct sctp_transport
*transport
;
3638 if (len
< sizeof(pinfo
)) {
3643 len
= sizeof(pinfo
);
3644 if (copy_from_user(&pinfo
, optval
, len
)) {
3649 transport
= sctp_addr_id2transport(sk
, &pinfo
.spinfo_address
,
3650 pinfo
.spinfo_assoc_id
);
3654 pinfo
.spinfo_assoc_id
= sctp_assoc2id(transport
->asoc
);
3655 pinfo
.spinfo_state
= transport
->state
;
3656 pinfo
.spinfo_cwnd
= transport
->cwnd
;
3657 pinfo
.spinfo_srtt
= transport
->srtt
;
3658 pinfo
.spinfo_rto
= jiffies_to_msecs(transport
->rto
);
3659 pinfo
.spinfo_mtu
= transport
->pathmtu
;
3661 if (pinfo
.spinfo_state
== SCTP_UNKNOWN
)
3662 pinfo
.spinfo_state
= SCTP_ACTIVE
;
3664 if (put_user(len
, optlen
)) {
3669 if (copy_to_user(optval
, &pinfo
, len
)) {
3678 /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS)
3680 * This option is a on/off flag. If enabled no SCTP message
3681 * fragmentation will be performed. Instead if a message being sent
3682 * exceeds the current PMTU size, the message will NOT be sent and
3683 * instead a error will be indicated to the user.
3685 static int sctp_getsockopt_disable_fragments(struct sock
*sk
, int len
,
3686 char __user
*optval
, int __user
*optlen
)
3690 if (len
< sizeof(int))
3694 val
= (sctp_sk(sk
)->disable_fragments
== 1);
3695 if (put_user(len
, optlen
))
3697 if (copy_to_user(optval
, &val
, len
))
3702 /* 7.1.15 Set notification and ancillary events (SCTP_EVENTS)
3704 * This socket option is used to specify various notifications and
3705 * ancillary data the user wishes to receive.
3707 static int sctp_getsockopt_events(struct sock
*sk
, int len
, char __user
*optval
,
3710 if (len
< sizeof(struct sctp_event_subscribe
))
3712 len
= sizeof(struct sctp_event_subscribe
);
3713 if (put_user(len
, optlen
))
3715 if (copy_to_user(optval
, &sctp_sk(sk
)->subscribe
, len
))
3720 /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE)
3722 * This socket option is applicable to the UDP-style socket only. When
3723 * set it will cause associations that are idle for more than the
3724 * specified number of seconds to automatically close. An association
3725 * being idle is defined an association that has NOT sent or received
3726 * user data. The special value of '0' indicates that no automatic
3727 * close of any associations should be performed. The option expects an
3728 * integer defining the number of seconds of idle time before an
3729 * association is closed.
3731 static int sctp_getsockopt_autoclose(struct sock
*sk
, int len
, char __user
*optval
, int __user
*optlen
)
3733 /* Applicable to UDP-style socket only */
3734 if (sctp_style(sk
, TCP
))
3736 if (len
< sizeof(int))
3739 if (put_user(len
, optlen
))
3741 if (copy_to_user(optval
, &sctp_sk(sk
)->autoclose
, sizeof(int)))
3746 /* Helper routine to branch off an association to a new socket. */
3747 SCTP_STATIC
int sctp_do_peeloff(struct sctp_association
*asoc
,
3748 struct socket
**sockp
)
3750 struct sock
*sk
= asoc
->base
.sk
;
3751 struct socket
*sock
;
3752 struct inet_sock
*inetsk
;
3756 /* An association cannot be branched off from an already peeled-off
3757 * socket, nor is this supported for tcp style sockets.
3759 if (!sctp_style(sk
, UDP
))
3762 /* Create a new socket. */
3763 err
= sock_create(sk
->sk_family
, SOCK_SEQPACKET
, IPPROTO_SCTP
, &sock
);
3767 /* Populate the fields of the newsk from the oldsk and migrate the
3768 * asoc to the newsk.
3770 sctp_sock_migrate(sk
, sock
->sk
, asoc
, SCTP_SOCKET_UDP_HIGH_BANDWIDTH
);
3772 /* Make peeled-off sockets more like 1-1 accepted sockets.
3773 * Set the daddr and initialize id to something more random
3775 af
= sctp_get_af_specific(asoc
->peer
.primary_addr
.sa
.sa_family
);
3776 af
->to_sk_daddr(&asoc
->peer
.primary_addr
, sk
);
3777 inetsk
= inet_sk(sock
->sk
);
3778 inetsk
->id
= asoc
->next_tsn
^ jiffies
;
3785 static int sctp_getsockopt_peeloff(struct sock
*sk
, int len
, char __user
*optval
, int __user
*optlen
)
3787 sctp_peeloff_arg_t peeloff
;
3788 struct socket
*newsock
;
3790 struct sctp_association
*asoc
;
3792 if (len
< sizeof(sctp_peeloff_arg_t
))
3794 len
= sizeof(sctp_peeloff_arg_t
);
3795 if (copy_from_user(&peeloff
, optval
, len
))
3798 asoc
= sctp_id2assoc(sk
, peeloff
.associd
);
3804 SCTP_DEBUG_PRINTK("%s: sk: %p asoc: %p\n", __FUNCTION__
, sk
, asoc
);
3806 retval
= sctp_do_peeloff(asoc
, &newsock
);
3810 /* Map the socket to an unused fd that can be returned to the user. */
3811 retval
= sock_map_fd(newsock
);
3813 sock_release(newsock
);
3817 SCTP_DEBUG_PRINTK("%s: sk: %p asoc: %p newsk: %p sd: %d\n",
3818 __FUNCTION__
, sk
, asoc
, newsock
->sk
, retval
);
3820 /* Return the fd mapped to the new socket. */
3821 peeloff
.sd
= retval
;
3822 if (put_user(len
, optlen
))
3824 if (copy_to_user(optval
, &peeloff
, len
))
3831 /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS)
3833 * Applications can enable or disable heartbeats for any peer address of
3834 * an association, modify an address's heartbeat interval, force a
3835 * heartbeat to be sent immediately, and adjust the address's maximum
3836 * number of retransmissions sent before an address is considered
3837 * unreachable. The following structure is used to access and modify an
3838 * address's parameters:
3840 * struct sctp_paddrparams {
3841 * sctp_assoc_t spp_assoc_id;
3842 * struct sockaddr_storage spp_address;
3843 * uint32_t spp_hbinterval;
3844 * uint16_t spp_pathmaxrxt;
3845 * uint32_t spp_pathmtu;
3846 * uint32_t spp_sackdelay;
3847 * uint32_t spp_flags;
3850 * spp_assoc_id - (one-to-many style socket) This is filled in the
3851 * application, and identifies the association for
3853 * spp_address - This specifies which address is of interest.
3854 * spp_hbinterval - This contains the value of the heartbeat interval,
3855 * in milliseconds. If a value of zero
3856 * is present in this field then no changes are to
3857 * be made to this parameter.
3858 * spp_pathmaxrxt - This contains the maximum number of
3859 * retransmissions before this address shall be
3860 * considered unreachable. If a value of zero
3861 * is present in this field then no changes are to
3862 * be made to this parameter.
3863 * spp_pathmtu - When Path MTU discovery is disabled the value
3864 * specified here will be the "fixed" path mtu.
3865 * Note that if the spp_address field is empty
3866 * then all associations on this address will
3867 * have this fixed path mtu set upon them.
3869 * spp_sackdelay - When delayed sack is enabled, this value specifies
3870 * the number of milliseconds that sacks will be delayed
3871 * for. This value will apply to all addresses of an
3872 * association if the spp_address field is empty. Note
3873 * also, that if delayed sack is enabled and this
3874 * value is set to 0, no change is made to the last
3875 * recorded delayed sack timer value.
3877 * spp_flags - These flags are used to control various features
3878 * on an association. The flag field may contain
3879 * zero or more of the following options.
3881 * SPP_HB_ENABLE - Enable heartbeats on the
3882 * specified address. Note that if the address
3883 * field is empty all addresses for the association
3884 * have heartbeats enabled upon them.
3886 * SPP_HB_DISABLE - Disable heartbeats on the
3887 * speicifed address. Note that if the address
3888 * field is empty all addresses for the association
3889 * will have their heartbeats disabled. Note also
3890 * that SPP_HB_ENABLE and SPP_HB_DISABLE are
3891 * mutually exclusive, only one of these two should
3892 * be specified. Enabling both fields will have
3893 * undetermined results.
3895 * SPP_HB_DEMAND - Request a user initiated heartbeat
3896 * to be made immediately.
3898 * SPP_PMTUD_ENABLE - This field will enable PMTU
3899 * discovery upon the specified address. Note that
3900 * if the address feild is empty then all addresses
3901 * on the association are effected.
3903 * SPP_PMTUD_DISABLE - This field will disable PMTU
3904 * discovery upon the specified address. Note that
3905 * if the address feild is empty then all addresses
3906 * on the association are effected. Not also that
3907 * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually
3908 * exclusive. Enabling both will have undetermined
3911 * SPP_SACKDELAY_ENABLE - Setting this flag turns
3912 * on delayed sack. The time specified in spp_sackdelay
3913 * is used to specify the sack delay for this address. Note
3914 * that if spp_address is empty then all addresses will
3915 * enable delayed sack and take on the sack delay
3916 * value specified in spp_sackdelay.
3917 * SPP_SACKDELAY_DISABLE - Setting this flag turns
3918 * off delayed sack. If the spp_address field is blank then
3919 * delayed sack is disabled for the entire association. Note
3920 * also that this field is mutually exclusive to
3921 * SPP_SACKDELAY_ENABLE, setting both will have undefined
3924 static int sctp_getsockopt_peer_addr_params(struct sock
*sk
, int len
,
3925 char __user
*optval
, int __user
*optlen
)
3927 struct sctp_paddrparams params
;
3928 struct sctp_transport
*trans
= NULL
;
3929 struct sctp_association
*asoc
= NULL
;
3930 struct sctp_sock
*sp
= sctp_sk(sk
);
3932 if (len
< sizeof(struct sctp_paddrparams
))
3934 len
= sizeof(struct sctp_paddrparams
);
3935 if (copy_from_user(¶ms
, optval
, len
))
3938 /* If an address other than INADDR_ANY is specified, and
3939 * no transport is found, then the request is invalid.
3941 if (!sctp_is_any(( union sctp_addr
*)¶ms
.spp_address
)) {
3942 trans
= sctp_addr_id2transport(sk
, ¶ms
.spp_address
,
3943 params
.spp_assoc_id
);
3945 SCTP_DEBUG_PRINTK("Failed no transport\n");
3950 /* Get association, if assoc_id != 0 and the socket is a one
3951 * to many style socket, and an association was not found, then
3952 * the id was invalid.
3954 asoc
= sctp_id2assoc(sk
, params
.spp_assoc_id
);
3955 if (!asoc
&& params
.spp_assoc_id
&& sctp_style(sk
, UDP
)) {
3956 SCTP_DEBUG_PRINTK("Failed no association\n");
3961 /* Fetch transport values. */
3962 params
.spp_hbinterval
= jiffies_to_msecs(trans
->hbinterval
);
3963 params
.spp_pathmtu
= trans
->pathmtu
;
3964 params
.spp_pathmaxrxt
= trans
->pathmaxrxt
;
3965 params
.spp_sackdelay
= jiffies_to_msecs(trans
->sackdelay
);
3967 /*draft-11 doesn't say what to return in spp_flags*/
3968 params
.spp_flags
= trans
->param_flags
;
3970 /* Fetch association values. */
3971 params
.spp_hbinterval
= jiffies_to_msecs(asoc
->hbinterval
);
3972 params
.spp_pathmtu
= asoc
->pathmtu
;
3973 params
.spp_pathmaxrxt
= asoc
->pathmaxrxt
;
3974 params
.spp_sackdelay
= jiffies_to_msecs(asoc
->sackdelay
);
3976 /*draft-11 doesn't say what to return in spp_flags*/
3977 params
.spp_flags
= asoc
->param_flags
;
3979 /* Fetch socket values. */
3980 params
.spp_hbinterval
= sp
->hbinterval
;
3981 params
.spp_pathmtu
= sp
->pathmtu
;
3982 params
.spp_sackdelay
= sp
->sackdelay
;
3983 params
.spp_pathmaxrxt
= sp
->pathmaxrxt
;
3985 /*draft-11 doesn't say what to return in spp_flags*/
3986 params
.spp_flags
= sp
->param_flags
;
3989 if (copy_to_user(optval
, ¶ms
, len
))
3992 if (put_user(len
, optlen
))
3998 /* 7.1.23. Delayed Ack Timer (SCTP_DELAYED_ACK_TIME)
4000 * This options will get or set the delayed ack timer. The time is set
4001 * in milliseconds. If the assoc_id is 0, then this sets or gets the
4002 * endpoints default delayed ack timer value. If the assoc_id field is
4003 * non-zero, then the set or get effects the specified association.
4005 * struct sctp_assoc_value {
4006 * sctp_assoc_t assoc_id;
4007 * uint32_t assoc_value;
4010 * assoc_id - This parameter, indicates which association the
4011 * user is preforming an action upon. Note that if
4012 * this field's value is zero then the endpoints
4013 * default value is changed (effecting future
4014 * associations only).
4016 * assoc_value - This parameter contains the number of milliseconds
4017 * that the user is requesting the delayed ACK timer
4018 * be set to. Note that this value is defined in
4019 * the standard to be between 200 and 500 milliseconds.
4021 * Note: a value of zero will leave the value alone,
4022 * but disable SACK delay. A non-zero value will also
4023 * enable SACK delay.
4025 static int sctp_getsockopt_delayed_ack_time(struct sock
*sk
, int len
,
4026 char __user
*optval
,
4029 struct sctp_assoc_value params
;
4030 struct sctp_association
*asoc
= NULL
;
4031 struct sctp_sock
*sp
= sctp_sk(sk
);
4033 if (len
< sizeof(struct sctp_assoc_value
))
4036 len
= sizeof(struct sctp_assoc_value
);
4038 if (copy_from_user(¶ms
, optval
, len
))
4041 /* Get association, if assoc_id != 0 and the socket is a one
4042 * to many style socket, and an association was not found, then
4043 * the id was invalid.
4045 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
4046 if (!asoc
&& params
.assoc_id
&& sctp_style(sk
, UDP
))
4050 /* Fetch association values. */
4051 if (asoc
->param_flags
& SPP_SACKDELAY_ENABLE
)
4052 params
.assoc_value
= jiffies_to_msecs(
4055 params
.assoc_value
= 0;
4057 /* Fetch socket values. */
4058 if (sp
->param_flags
& SPP_SACKDELAY_ENABLE
)
4059 params
.assoc_value
= sp
->sackdelay
;
4061 params
.assoc_value
= 0;
4064 if (copy_to_user(optval
, ¶ms
, len
))
4067 if (put_user(len
, optlen
))
4073 /* 7.1.3 Initialization Parameters (SCTP_INITMSG)
4075 * Applications can specify protocol parameters for the default association
4076 * initialization. The option name argument to setsockopt() and getsockopt()
4079 * Setting initialization parameters is effective only on an unconnected
4080 * socket (for UDP-style sockets only future associations are effected
4081 * by the change). With TCP-style sockets, this option is inherited by
4082 * sockets derived from a listener socket.
4084 static int sctp_getsockopt_initmsg(struct sock
*sk
, int len
, char __user
*optval
, int __user
*optlen
)
4086 if (len
< sizeof(struct sctp_initmsg
))
4088 len
= sizeof(struct sctp_initmsg
);
4089 if (put_user(len
, optlen
))
4091 if (copy_to_user(optval
, &sctp_sk(sk
)->initmsg
, len
))
4096 static int sctp_getsockopt_peer_addrs_num_old(struct sock
*sk
, int len
,
4097 char __user
*optval
,
4101 struct sctp_association
*asoc
;
4102 struct list_head
*pos
;
4105 if (len
< sizeof(sctp_assoc_t
))
4108 if (copy_from_user(&id
, optval
, sizeof(sctp_assoc_t
)))
4111 /* For UDP-style sockets, id specifies the association to query. */
4112 asoc
= sctp_id2assoc(sk
, id
);
4116 list_for_each(pos
, &asoc
->peer
.transport_addr_list
) {
4124 * Old API for getting list of peer addresses. Does not work for 32-bit
4125 * programs running on a 64-bit kernel
4127 static int sctp_getsockopt_peer_addrs_old(struct sock
*sk
, int len
,
4128 char __user
*optval
,
4131 struct sctp_association
*asoc
;
4132 struct list_head
*pos
;
4134 struct sctp_getaddrs_old getaddrs
;
4135 struct sctp_transport
*from
;
4137 union sctp_addr temp
;
4138 struct sctp_sock
*sp
= sctp_sk(sk
);
4141 if (len
< sizeof(struct sctp_getaddrs_old
))
4144 len
= sizeof(struct sctp_getaddrs_old
);
4146 if (copy_from_user(&getaddrs
, optval
, len
))
4149 if (getaddrs
.addr_num
<= 0) return -EINVAL
;
4151 /* For UDP-style sockets, id specifies the association to query. */
4152 asoc
= sctp_id2assoc(sk
, getaddrs
.assoc_id
);
4156 to
= (void __user
*)getaddrs
.addrs
;
4157 list_for_each(pos
, &asoc
->peer
.transport_addr_list
) {
4158 from
= list_entry(pos
, struct sctp_transport
, transports
);
4159 memcpy(&temp
, &from
->ipaddr
, sizeof(temp
));
4160 sctp_get_pf_specific(sk
->sk_family
)->addr_v4map(sp
, &temp
);
4161 addrlen
= sctp_get_af_specific(sk
->sk_family
)->sockaddr_len
;
4162 if (copy_to_user(to
, &temp
, addrlen
))
4166 if (cnt
>= getaddrs
.addr_num
) break;
4168 getaddrs
.addr_num
= cnt
;
4169 if (put_user(len
, optlen
))
4171 if (copy_to_user(optval
, &getaddrs
, len
))
4177 static int sctp_getsockopt_peer_addrs(struct sock
*sk
, int len
,
4178 char __user
*optval
, int __user
*optlen
)
4180 struct sctp_association
*asoc
;
4181 struct list_head
*pos
;
4183 struct sctp_getaddrs getaddrs
;
4184 struct sctp_transport
*from
;
4186 union sctp_addr temp
;
4187 struct sctp_sock
*sp
= sctp_sk(sk
);
4192 if (len
< sizeof(struct sctp_getaddrs
))
4195 if (copy_from_user(&getaddrs
, optval
, sizeof(struct sctp_getaddrs
)))
4198 /* For UDP-style sockets, id specifies the association to query. */
4199 asoc
= sctp_id2assoc(sk
, getaddrs
.assoc_id
);
4203 to
= optval
+ offsetof(struct sctp_getaddrs
,addrs
);
4204 space_left
= len
- offsetof(struct sctp_getaddrs
,addrs
);
4206 list_for_each(pos
, &asoc
->peer
.transport_addr_list
) {
4207 from
= list_entry(pos
, struct sctp_transport
, transports
);
4208 memcpy(&temp
, &from
->ipaddr
, sizeof(temp
));
4209 sctp_get_pf_specific(sk
->sk_family
)->addr_v4map(sp
, &temp
);
4210 addrlen
= sctp_get_af_specific(sk
->sk_family
)->sockaddr_len
;
4211 if (space_left
< addrlen
)
4213 if (copy_to_user(to
, &temp
, addrlen
))
4217 space_left
-= addrlen
;
4220 if (put_user(cnt
, &((struct sctp_getaddrs __user
*)optval
)->addr_num
))
4222 bytes_copied
= ((char __user
*)to
) - optval
;
4223 if (put_user(bytes_copied
, optlen
))
4229 static int sctp_getsockopt_local_addrs_num_old(struct sock
*sk
, int len
,
4230 char __user
*optval
,
4234 struct sctp_bind_addr
*bp
;
4235 struct sctp_association
*asoc
;
4236 struct sctp_sockaddr_entry
*addr
;
4239 if (len
< sizeof(sctp_assoc_t
))
4242 if (copy_from_user(&id
, optval
, sizeof(sctp_assoc_t
)))
4246 * For UDP-style sockets, id specifies the association to query.
4247 * If the id field is set to the value '0' then the locally bound
4248 * addresses are returned without regard to any particular
4252 bp
= &sctp_sk(sk
)->ep
->base
.bind_addr
;
4254 asoc
= sctp_id2assoc(sk
, id
);
4257 bp
= &asoc
->base
.bind_addr
;
4260 /* If the endpoint is bound to 0.0.0.0 or ::0, count the valid
4261 * addresses from the global local address list.
4263 if (sctp_list_single_entry(&bp
->address_list
)) {
4264 addr
= list_entry(bp
->address_list
.next
,
4265 struct sctp_sockaddr_entry
, list
);
4266 if (sctp_is_any(&addr
->a
)) {
4268 list_for_each_entry_rcu(addr
,
4269 &sctp_local_addr_list
, list
) {
4273 if ((PF_INET
== sk
->sk_family
) &&
4274 (AF_INET6
== addr
->a
.sa
.sa_family
))
4286 /* Protection on the bound address list is not needed,
4287 * since in the socket option context we hold the socket lock,
4288 * so there is no way that the bound address list can change.
4290 list_for_each_entry(addr
, &bp
->address_list
, list
) {
4297 /* Helper function that copies local addresses to user and returns the number
4298 * of addresses copied.
4300 static int sctp_copy_laddrs_old(struct sock
*sk
, __u16 port
,
4301 int max_addrs
, void *to
,
4304 struct sctp_sockaddr_entry
*addr
;
4305 union sctp_addr temp
;
4310 list_for_each_entry_rcu(addr
, &sctp_local_addr_list
, list
) {
4314 if ((PF_INET
== sk
->sk_family
) &&
4315 (AF_INET6
== addr
->a
.sa
.sa_family
))
4317 memcpy(&temp
, &addr
->a
, sizeof(temp
));
4318 if (!temp
.v4
.sin_port
)
4319 temp
.v4
.sin_port
= htons(port
);
4321 sctp_get_pf_specific(sk
->sk_family
)->addr_v4map(sctp_sk(sk
),
4323 addrlen
= sctp_get_af_specific(temp
.sa
.sa_family
)->sockaddr_len
;
4324 memcpy(to
, &temp
, addrlen
);
4327 *bytes_copied
+= addrlen
;
4329 if (cnt
>= max_addrs
) break;
4336 static int sctp_copy_laddrs(struct sock
*sk
, __u16 port
, void *to
,
4337 size_t space_left
, int *bytes_copied
)
4339 struct sctp_sockaddr_entry
*addr
;
4340 union sctp_addr temp
;
4345 list_for_each_entry_rcu(addr
, &sctp_local_addr_list
, list
) {
4349 if ((PF_INET
== sk
->sk_family
) &&
4350 (AF_INET6
== addr
->a
.sa
.sa_family
))
4352 memcpy(&temp
, &addr
->a
, sizeof(temp
));
4353 if (!temp
.v4
.sin_port
)
4354 temp
.v4
.sin_port
= htons(port
);
4356 sctp_get_pf_specific(sk
->sk_family
)->addr_v4map(sctp_sk(sk
),
4358 addrlen
= sctp_get_af_specific(temp
.sa
.sa_family
)->sockaddr_len
;
4359 if (space_left
< addrlen
) {
4363 memcpy(to
, &temp
, addrlen
);
4367 space_left
-= addrlen
;
4368 *bytes_copied
+= addrlen
;
4375 /* Old API for getting list of local addresses. Does not work for 32-bit
4376 * programs running on a 64-bit kernel
4378 static int sctp_getsockopt_local_addrs_old(struct sock
*sk
, int len
,
4379 char __user
*optval
, int __user
*optlen
)
4381 struct sctp_bind_addr
*bp
;
4382 struct sctp_association
*asoc
;
4384 struct sctp_getaddrs_old getaddrs
;
4385 struct sctp_sockaddr_entry
*addr
;
4387 union sctp_addr temp
;
4388 struct sctp_sock
*sp
= sctp_sk(sk
);
4393 int bytes_copied
= 0;
4395 if (len
< sizeof(struct sctp_getaddrs_old
))
4398 len
= sizeof(struct sctp_getaddrs_old
);
4399 if (copy_from_user(&getaddrs
, optval
, len
))
4402 if (getaddrs
.addr_num
<= 0) return -EINVAL
;
4404 * For UDP-style sockets, id specifies the association to query.
4405 * If the id field is set to the value '0' then the locally bound
4406 * addresses are returned without regard to any particular
4409 if (0 == getaddrs
.assoc_id
) {
4410 bp
= &sctp_sk(sk
)->ep
->base
.bind_addr
;
4412 asoc
= sctp_id2assoc(sk
, getaddrs
.assoc_id
);
4415 bp
= &asoc
->base
.bind_addr
;
4418 to
= getaddrs
.addrs
;
4420 /* Allocate space for a local instance of packed array to hold all
4421 * the data. We store addresses here first and then put write them
4422 * to the user in one shot.
4424 addrs
= kmalloc(sizeof(union sctp_addr
) * getaddrs
.addr_num
,
4429 /* If the endpoint is bound to 0.0.0.0 or ::0, get the valid
4430 * addresses from the global local address list.
4432 if (sctp_list_single_entry(&bp
->address_list
)) {
4433 addr
= list_entry(bp
->address_list
.next
,
4434 struct sctp_sockaddr_entry
, list
);
4435 if (sctp_is_any(&addr
->a
)) {
4436 cnt
= sctp_copy_laddrs_old(sk
, bp
->port
,
4438 addrs
, &bytes_copied
);
4444 /* Protection on the bound address list is not needed since
4445 * in the socket option context we hold a socket lock and
4446 * thus the bound address list can't change.
4448 list_for_each_entry(addr
, &bp
->address_list
, list
) {
4449 memcpy(&temp
, &addr
->a
, sizeof(temp
));
4450 sctp_get_pf_specific(sk
->sk_family
)->addr_v4map(sp
, &temp
);
4451 addrlen
= sctp_get_af_specific(temp
.sa
.sa_family
)->sockaddr_len
;
4452 memcpy(buf
, &temp
, addrlen
);
4454 bytes_copied
+= addrlen
;
4456 if (cnt
>= getaddrs
.addr_num
) break;
4460 /* copy the entire address list into the user provided space */
4461 if (copy_to_user(to
, addrs
, bytes_copied
)) {
4466 /* copy the leading structure back to user */
4467 getaddrs
.addr_num
= cnt
;
4468 if (copy_to_user(optval
, &getaddrs
, len
))
4476 static int sctp_getsockopt_local_addrs(struct sock
*sk
, int len
,
4477 char __user
*optval
, int __user
*optlen
)
4479 struct sctp_bind_addr
*bp
;
4480 struct sctp_association
*asoc
;
4482 struct sctp_getaddrs getaddrs
;
4483 struct sctp_sockaddr_entry
*addr
;
4485 union sctp_addr temp
;
4486 struct sctp_sock
*sp
= sctp_sk(sk
);
4490 int bytes_copied
= 0;
4494 if (len
< sizeof(struct sctp_getaddrs
))
4497 if (copy_from_user(&getaddrs
, optval
, sizeof(struct sctp_getaddrs
)))
4501 * For UDP-style sockets, id specifies the association to query.
4502 * If the id field is set to the value '0' then the locally bound
4503 * addresses are returned without regard to any particular
4506 if (0 == getaddrs
.assoc_id
) {
4507 bp
= &sctp_sk(sk
)->ep
->base
.bind_addr
;
4509 asoc
= sctp_id2assoc(sk
, getaddrs
.assoc_id
);
4512 bp
= &asoc
->base
.bind_addr
;
4515 to
= optval
+ offsetof(struct sctp_getaddrs
,addrs
);
4516 space_left
= len
- offsetof(struct sctp_getaddrs
,addrs
);
4518 addrs
= kmalloc(space_left
, GFP_KERNEL
);
4522 /* If the endpoint is bound to 0.0.0.0 or ::0, get the valid
4523 * addresses from the global local address list.
4525 if (sctp_list_single_entry(&bp
->address_list
)) {
4526 addr
= list_entry(bp
->address_list
.next
,
4527 struct sctp_sockaddr_entry
, list
);
4528 if (sctp_is_any(&addr
->a
)) {
4529 cnt
= sctp_copy_laddrs(sk
, bp
->port
, addrs
,
4530 space_left
, &bytes_copied
);
4540 /* Protection on the bound address list is not needed since
4541 * in the socket option context we hold a socket lock and
4542 * thus the bound address list can't change.
4544 list_for_each_entry(addr
, &bp
->address_list
, list
) {
4545 memcpy(&temp
, &addr
->a
, sizeof(temp
));
4546 sctp_get_pf_specific(sk
->sk_family
)->addr_v4map(sp
, &temp
);
4547 addrlen
= sctp_get_af_specific(temp
.sa
.sa_family
)->sockaddr_len
;
4548 if (space_left
< addrlen
) {
4549 err
= -ENOMEM
; /*fixme: right error?*/
4552 memcpy(buf
, &temp
, addrlen
);
4554 bytes_copied
+= addrlen
;
4556 space_left
-= addrlen
;
4560 if (copy_to_user(to
, addrs
, bytes_copied
)) {
4564 if (put_user(cnt
, &((struct sctp_getaddrs __user
*)optval
)->addr_num
)) {
4568 if (put_user(bytes_copied
, optlen
))
4575 /* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
4577 * Requests that the local SCTP stack use the enclosed peer address as
4578 * the association primary. The enclosed address must be one of the
4579 * association peer's addresses.
4581 static int sctp_getsockopt_primary_addr(struct sock
*sk
, int len
,
4582 char __user
*optval
, int __user
*optlen
)
4584 struct sctp_prim prim
;
4585 struct sctp_association
*asoc
;
4586 struct sctp_sock
*sp
= sctp_sk(sk
);
4588 if (len
< sizeof(struct sctp_prim
))
4591 len
= sizeof(struct sctp_prim
);
4593 if (copy_from_user(&prim
, optval
, len
))
4596 asoc
= sctp_id2assoc(sk
, prim
.ssp_assoc_id
);
4600 if (!asoc
->peer
.primary_path
)
4603 memcpy(&prim
.ssp_addr
, &asoc
->peer
.primary_path
->ipaddr
,
4604 asoc
->peer
.primary_path
->af_specific
->sockaddr_len
);
4606 sctp_get_pf_specific(sk
->sk_family
)->addr_v4map(sp
,
4607 (union sctp_addr
*)&prim
.ssp_addr
);
4609 if (put_user(len
, optlen
))
4611 if (copy_to_user(optval
, &prim
, len
))
4618 * 7.1.11 Set Adaptation Layer Indicator (SCTP_ADAPTATION_LAYER)
4620 * Requests that the local endpoint set the specified Adaptation Layer
4621 * Indication parameter for all future INIT and INIT-ACK exchanges.
4623 static int sctp_getsockopt_adaptation_layer(struct sock
*sk
, int len
,
4624 char __user
*optval
, int __user
*optlen
)
4626 struct sctp_setadaptation adaptation
;
4628 if (len
< sizeof(struct sctp_setadaptation
))
4631 len
= sizeof(struct sctp_setadaptation
);
4633 adaptation
.ssb_adaptation_ind
= sctp_sk(sk
)->adaptation_ind
;
4635 if (put_user(len
, optlen
))
4637 if (copy_to_user(optval
, &adaptation
, len
))
4645 * 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM)
4647 * Applications that wish to use the sendto() system call may wish to
4648 * specify a default set of parameters that would normally be supplied
4649 * through the inclusion of ancillary data. This socket option allows
4650 * such an application to set the default sctp_sndrcvinfo structure.
4653 * The application that wishes to use this socket option simply passes
4654 * in to this call the sctp_sndrcvinfo structure defined in Section
4655 * 5.2.2) The input parameters accepted by this call include
4656 * sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context,
4657 * sinfo_timetolive. The user must provide the sinfo_assoc_id field in
4658 * to this call if the caller is using the UDP model.
4660 * For getsockopt, it get the default sctp_sndrcvinfo structure.
4662 static int sctp_getsockopt_default_send_param(struct sock
*sk
,
4663 int len
, char __user
*optval
,
4666 struct sctp_sndrcvinfo info
;
4667 struct sctp_association
*asoc
;
4668 struct sctp_sock
*sp
= sctp_sk(sk
);
4670 if (len
< sizeof(struct sctp_sndrcvinfo
))
4673 len
= sizeof(struct sctp_sndrcvinfo
);
4675 if (copy_from_user(&info
, optval
, len
))
4678 asoc
= sctp_id2assoc(sk
, info
.sinfo_assoc_id
);
4679 if (!asoc
&& info
.sinfo_assoc_id
&& sctp_style(sk
, UDP
))
4683 info
.sinfo_stream
= asoc
->default_stream
;
4684 info
.sinfo_flags
= asoc
->default_flags
;
4685 info
.sinfo_ppid
= asoc
->default_ppid
;
4686 info
.sinfo_context
= asoc
->default_context
;
4687 info
.sinfo_timetolive
= asoc
->default_timetolive
;
4689 info
.sinfo_stream
= sp
->default_stream
;
4690 info
.sinfo_flags
= sp
->default_flags
;
4691 info
.sinfo_ppid
= sp
->default_ppid
;
4692 info
.sinfo_context
= sp
->default_context
;
4693 info
.sinfo_timetolive
= sp
->default_timetolive
;
4696 if (put_user(len
, optlen
))
4698 if (copy_to_user(optval
, &info
, len
))
4706 * 7.1.5 SCTP_NODELAY
4708 * Turn on/off any Nagle-like algorithm. This means that packets are
4709 * generally sent as soon as possible and no unnecessary delays are
4710 * introduced, at the cost of more packets in the network. Expects an
4711 * integer boolean flag.
4714 static int sctp_getsockopt_nodelay(struct sock
*sk
, int len
,
4715 char __user
*optval
, int __user
*optlen
)
4719 if (len
< sizeof(int))
4723 val
= (sctp_sk(sk
)->nodelay
== 1);
4724 if (put_user(len
, optlen
))
4726 if (copy_to_user(optval
, &val
, len
))
4733 * 7.1.1 SCTP_RTOINFO
4735 * The protocol parameters used to initialize and bound retransmission
4736 * timeout (RTO) are tunable. sctp_rtoinfo structure is used to access
4737 * and modify these parameters.
4738 * All parameters are time values, in milliseconds. A value of 0, when
4739 * modifying the parameters, indicates that the current value should not
4743 static int sctp_getsockopt_rtoinfo(struct sock
*sk
, int len
,
4744 char __user
*optval
,
4745 int __user
*optlen
) {
4746 struct sctp_rtoinfo rtoinfo
;
4747 struct sctp_association
*asoc
;
4749 if (len
< sizeof (struct sctp_rtoinfo
))
4752 len
= sizeof(struct sctp_rtoinfo
);
4754 if (copy_from_user(&rtoinfo
, optval
, len
))
4757 asoc
= sctp_id2assoc(sk
, rtoinfo
.srto_assoc_id
);
4759 if (!asoc
&& rtoinfo
.srto_assoc_id
&& sctp_style(sk
, UDP
))
4762 /* Values corresponding to the specific association. */
4764 rtoinfo
.srto_initial
= jiffies_to_msecs(asoc
->rto_initial
);
4765 rtoinfo
.srto_max
= jiffies_to_msecs(asoc
->rto_max
);
4766 rtoinfo
.srto_min
= jiffies_to_msecs(asoc
->rto_min
);
4768 /* Values corresponding to the endpoint. */
4769 struct sctp_sock
*sp
= sctp_sk(sk
);
4771 rtoinfo
.srto_initial
= sp
->rtoinfo
.srto_initial
;
4772 rtoinfo
.srto_max
= sp
->rtoinfo
.srto_max
;
4773 rtoinfo
.srto_min
= sp
->rtoinfo
.srto_min
;
4776 if (put_user(len
, optlen
))
4779 if (copy_to_user(optval
, &rtoinfo
, len
))
4787 * 7.1.2 SCTP_ASSOCINFO
4789 * This option is used to tune the maximum retransmission attempts
4790 * of the association.
4791 * Returns an error if the new association retransmission value is
4792 * greater than the sum of the retransmission value of the peer.
4793 * See [SCTP] for more information.
4796 static int sctp_getsockopt_associnfo(struct sock
*sk
, int len
,
4797 char __user
*optval
,
4801 struct sctp_assocparams assocparams
;
4802 struct sctp_association
*asoc
;
4803 struct list_head
*pos
;
4806 if (len
< sizeof (struct sctp_assocparams
))
4809 len
= sizeof(struct sctp_assocparams
);
4811 if (copy_from_user(&assocparams
, optval
, len
))
4814 asoc
= sctp_id2assoc(sk
, assocparams
.sasoc_assoc_id
);
4816 if (!asoc
&& assocparams
.sasoc_assoc_id
&& sctp_style(sk
, UDP
))
4819 /* Values correspoinding to the specific association */
4821 assocparams
.sasoc_asocmaxrxt
= asoc
->max_retrans
;
4822 assocparams
.sasoc_peer_rwnd
= asoc
->peer
.rwnd
;
4823 assocparams
.sasoc_local_rwnd
= asoc
->a_rwnd
;
4824 assocparams
.sasoc_cookie_life
= (asoc
->cookie_life
.tv_sec
4826 (asoc
->cookie_life
.tv_usec
4829 list_for_each(pos
, &asoc
->peer
.transport_addr_list
) {
4833 assocparams
.sasoc_number_peer_destinations
= cnt
;
4835 /* Values corresponding to the endpoint */
4836 struct sctp_sock
*sp
= sctp_sk(sk
);
4838 assocparams
.sasoc_asocmaxrxt
= sp
->assocparams
.sasoc_asocmaxrxt
;
4839 assocparams
.sasoc_peer_rwnd
= sp
->assocparams
.sasoc_peer_rwnd
;
4840 assocparams
.sasoc_local_rwnd
= sp
->assocparams
.sasoc_local_rwnd
;
4841 assocparams
.sasoc_cookie_life
=
4842 sp
->assocparams
.sasoc_cookie_life
;
4843 assocparams
.sasoc_number_peer_destinations
=
4845 sasoc_number_peer_destinations
;
4848 if (put_user(len
, optlen
))
4851 if (copy_to_user(optval
, &assocparams
, len
))
4858 * 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR)
4860 * This socket option is a boolean flag which turns on or off mapped V4
4861 * addresses. If this option is turned on and the socket is type
4862 * PF_INET6, then IPv4 addresses will be mapped to V6 representation.
4863 * If this option is turned off, then no mapping will be done of V4
4864 * addresses and a user will receive both PF_INET6 and PF_INET type
4865 * addresses on the socket.
4867 static int sctp_getsockopt_mappedv4(struct sock
*sk
, int len
,
4868 char __user
*optval
, int __user
*optlen
)
4871 struct sctp_sock
*sp
= sctp_sk(sk
);
4873 if (len
< sizeof(int))
4878 if (put_user(len
, optlen
))
4880 if (copy_to_user(optval
, &val
, len
))
4887 * 7.1.29. Set or Get the default context (SCTP_CONTEXT)
4888 * (chapter and verse is quoted at sctp_setsockopt_context())
4890 static int sctp_getsockopt_context(struct sock
*sk
, int len
,
4891 char __user
*optval
, int __user
*optlen
)
4893 struct sctp_assoc_value params
;
4894 struct sctp_sock
*sp
;
4895 struct sctp_association
*asoc
;
4897 if (len
< sizeof(struct sctp_assoc_value
))
4900 len
= sizeof(struct sctp_assoc_value
);
4902 if (copy_from_user(¶ms
, optval
, len
))
4907 if (params
.assoc_id
!= 0) {
4908 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
4911 params
.assoc_value
= asoc
->default_rcv_context
;
4913 params
.assoc_value
= sp
->default_rcv_context
;
4916 if (put_user(len
, optlen
))
4918 if (copy_to_user(optval
, ¶ms
, len
))
4925 * 7.1.17 Set the maximum fragrmentation size (SCTP_MAXSEG)
4927 * This socket option specifies the maximum size to put in any outgoing
4928 * SCTP chunk. If a message is larger than this size it will be
4929 * fragmented by SCTP into the specified size. Note that the underlying
4930 * SCTP implementation may fragment into smaller sized chunks when the
4931 * PMTU of the underlying association is smaller than the value set by
4934 static int sctp_getsockopt_maxseg(struct sock
*sk
, int len
,
4935 char __user
*optval
, int __user
*optlen
)
4939 if (len
< sizeof(int))
4944 val
= sctp_sk(sk
)->user_frag
;
4945 if (put_user(len
, optlen
))
4947 if (copy_to_user(optval
, &val
, len
))
4954 * 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE)
4955 * (chapter and verse is quoted at sctp_setsockopt_fragment_interleave())
4957 static int sctp_getsockopt_fragment_interleave(struct sock
*sk
, int len
,
4958 char __user
*optval
, int __user
*optlen
)
4962 if (len
< sizeof(int))
4967 val
= sctp_sk(sk
)->frag_interleave
;
4968 if (put_user(len
, optlen
))
4970 if (copy_to_user(optval
, &val
, len
))
4977 * 7.1.25. Set or Get the sctp partial delivery point
4978 * (chapter and verse is quoted at sctp_setsockopt_partial_delivery_point())
4980 static int sctp_getsockopt_partial_delivery_point(struct sock
*sk
, int len
,
4981 char __user
*optval
,
4986 if (len
< sizeof(u32
))
4991 val
= sctp_sk(sk
)->pd_point
;
4992 if (put_user(len
, optlen
))
4994 if (copy_to_user(optval
, &val
, len
))
5001 * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST)
5002 * (chapter and verse is quoted at sctp_setsockopt_maxburst())
5004 static int sctp_getsockopt_maxburst(struct sock
*sk
, int len
,
5005 char __user
*optval
,
5010 if (len
< sizeof(int))
5015 val
= sctp_sk(sk
)->max_burst
;
5016 if (put_user(len
, optlen
))
5018 if (copy_to_user(optval
, &val
, len
))
5024 static int sctp_getsockopt_hmac_ident(struct sock
*sk
, int len
,
5025 char __user
*optval
, int __user
*optlen
)
5027 struct sctp_hmac_algo_param
*hmacs
;
5030 hmacs
= sctp_sk(sk
)->ep
->auth_hmacs_list
;
5031 param_len
= ntohs(hmacs
->param_hdr
.length
);
5033 if (len
< param_len
)
5035 if (put_user(len
, optlen
))
5037 if (copy_to_user(optval
, hmacs
->hmac_ids
, len
))
5043 static int sctp_getsockopt_active_key(struct sock
*sk
, int len
,
5044 char __user
*optval
, int __user
*optlen
)
5046 struct sctp_authkeyid val
;
5047 struct sctp_association
*asoc
;
5049 if (len
< sizeof(struct sctp_authkeyid
))
5051 if (copy_from_user(&val
, optval
, sizeof(struct sctp_authkeyid
)))
5054 asoc
= sctp_id2assoc(sk
, val
.scact_assoc_id
);
5055 if (!asoc
&& val
.scact_assoc_id
&& sctp_style(sk
, UDP
))
5059 val
.scact_keynumber
= asoc
->active_key_id
;
5061 val
.scact_keynumber
= sctp_sk(sk
)->ep
->active_key_id
;
5066 static int sctp_getsockopt_peer_auth_chunks(struct sock
*sk
, int len
,
5067 char __user
*optval
, int __user
*optlen
)
5069 struct sctp_authchunks __user
*p
= (void __user
*)optval
;
5070 struct sctp_authchunks val
;
5071 struct sctp_association
*asoc
;
5072 struct sctp_chunks_param
*ch
;
5075 if (len
<= sizeof(struct sctp_authchunks
))
5078 if (copy_from_user(&val
, p
, sizeof(struct sctp_authchunks
)))
5081 to
= p
->gauth_chunks
;
5082 asoc
= sctp_id2assoc(sk
, val
.gauth_assoc_id
);
5086 ch
= asoc
->peer
.peer_chunks
;
5088 /* See if the user provided enough room for all the data */
5089 if (len
< ntohs(ch
->param_hdr
.length
))
5092 len
= ntohs(ch
->param_hdr
.length
);
5093 if (put_user(len
, optlen
))
5095 if (copy_to_user(to
, ch
->chunks
, len
))
5101 static int sctp_getsockopt_local_auth_chunks(struct sock
*sk
, int len
,
5102 char __user
*optval
, int __user
*optlen
)
5104 struct sctp_authchunks __user
*p
= (void __user
*)optval
;
5105 struct sctp_authchunks val
;
5106 struct sctp_association
*asoc
;
5107 struct sctp_chunks_param
*ch
;
5110 if (len
<= sizeof(struct sctp_authchunks
))
5113 if (copy_from_user(&val
, p
, sizeof(struct sctp_authchunks
)))
5116 to
= p
->gauth_chunks
;
5117 asoc
= sctp_id2assoc(sk
, val
.gauth_assoc_id
);
5118 if (!asoc
&& val
.gauth_assoc_id
&& sctp_style(sk
, UDP
))
5122 ch
= (struct sctp_chunks_param
*)asoc
->c
.auth_chunks
;
5124 ch
= sctp_sk(sk
)->ep
->auth_chunk_list
;
5126 if (len
< ntohs(ch
->param_hdr
.length
))
5129 len
= ntohs(ch
->param_hdr
.length
);
5130 if (put_user(len
, optlen
))
5132 if (copy_to_user(to
, ch
->chunks
, len
))
5138 SCTP_STATIC
int sctp_getsockopt(struct sock
*sk
, int level
, int optname
,
5139 char __user
*optval
, int __user
*optlen
)
5144 SCTP_DEBUG_PRINTK("sctp_getsockopt(sk: %p... optname: %d)\n",
5147 /* I can hardly begin to describe how wrong this is. This is
5148 * so broken as to be worse than useless. The API draft
5149 * REALLY is NOT helpful here... I am not convinced that the
5150 * semantics of getsockopt() with a level OTHER THAN SOL_SCTP
5151 * are at all well-founded.
5153 if (level
!= SOL_SCTP
) {
5154 struct sctp_af
*af
= sctp_sk(sk
)->pf
->af
;
5156 retval
= af
->getsockopt(sk
, level
, optname
, optval
, optlen
);
5160 if (get_user(len
, optlen
))
5167 retval
= sctp_getsockopt_sctp_status(sk
, len
, optval
, optlen
);
5169 case SCTP_DISABLE_FRAGMENTS
:
5170 retval
= sctp_getsockopt_disable_fragments(sk
, len
, optval
,
5174 retval
= sctp_getsockopt_events(sk
, len
, optval
, optlen
);
5176 case SCTP_AUTOCLOSE
:
5177 retval
= sctp_getsockopt_autoclose(sk
, len
, optval
, optlen
);
5179 case SCTP_SOCKOPT_PEELOFF
:
5180 retval
= sctp_getsockopt_peeloff(sk
, len
, optval
, optlen
);
5182 case SCTP_PEER_ADDR_PARAMS
:
5183 retval
= sctp_getsockopt_peer_addr_params(sk
, len
, optval
,
5186 case SCTP_DELAYED_ACK_TIME
:
5187 retval
= sctp_getsockopt_delayed_ack_time(sk
, len
, optval
,
5191 retval
= sctp_getsockopt_initmsg(sk
, len
, optval
, optlen
);
5193 case SCTP_GET_PEER_ADDRS_NUM_OLD
:
5194 retval
= sctp_getsockopt_peer_addrs_num_old(sk
, len
, optval
,
5197 case SCTP_GET_LOCAL_ADDRS_NUM_OLD
:
5198 retval
= sctp_getsockopt_local_addrs_num_old(sk
, len
, optval
,
5201 case SCTP_GET_PEER_ADDRS_OLD
:
5202 retval
= sctp_getsockopt_peer_addrs_old(sk
, len
, optval
,
5205 case SCTP_GET_LOCAL_ADDRS_OLD
:
5206 retval
= sctp_getsockopt_local_addrs_old(sk
, len
, optval
,
5209 case SCTP_GET_PEER_ADDRS
:
5210 retval
= sctp_getsockopt_peer_addrs(sk
, len
, optval
,
5213 case SCTP_GET_LOCAL_ADDRS
:
5214 retval
= sctp_getsockopt_local_addrs(sk
, len
, optval
,
5217 case SCTP_DEFAULT_SEND_PARAM
:
5218 retval
= sctp_getsockopt_default_send_param(sk
, len
,
5221 case SCTP_PRIMARY_ADDR
:
5222 retval
= sctp_getsockopt_primary_addr(sk
, len
, optval
, optlen
);
5225 retval
= sctp_getsockopt_nodelay(sk
, len
, optval
, optlen
);
5228 retval
= sctp_getsockopt_rtoinfo(sk
, len
, optval
, optlen
);
5230 case SCTP_ASSOCINFO
:
5231 retval
= sctp_getsockopt_associnfo(sk
, len
, optval
, optlen
);
5233 case SCTP_I_WANT_MAPPED_V4_ADDR
:
5234 retval
= sctp_getsockopt_mappedv4(sk
, len
, optval
, optlen
);
5237 retval
= sctp_getsockopt_maxseg(sk
, len
, optval
, optlen
);
5239 case SCTP_GET_PEER_ADDR_INFO
:
5240 retval
= sctp_getsockopt_peer_addr_info(sk
, len
, optval
,
5243 case SCTP_ADAPTATION_LAYER
:
5244 retval
= sctp_getsockopt_adaptation_layer(sk
, len
, optval
,
5248 retval
= sctp_getsockopt_context(sk
, len
, optval
, optlen
);
5250 case SCTP_FRAGMENT_INTERLEAVE
:
5251 retval
= sctp_getsockopt_fragment_interleave(sk
, len
, optval
,
5254 case SCTP_PARTIAL_DELIVERY_POINT
:
5255 retval
= sctp_getsockopt_partial_delivery_point(sk
, len
, optval
,
5258 case SCTP_MAX_BURST
:
5259 retval
= sctp_getsockopt_maxburst(sk
, len
, optval
, optlen
);
5262 case SCTP_AUTH_CHUNK
:
5263 case SCTP_AUTH_DELETE_KEY
:
5264 retval
= -EOPNOTSUPP
;
5266 case SCTP_HMAC_IDENT
:
5267 retval
= sctp_getsockopt_hmac_ident(sk
, len
, optval
, optlen
);
5269 case SCTP_AUTH_ACTIVE_KEY
:
5270 retval
= sctp_getsockopt_active_key(sk
, len
, optval
, optlen
);
5272 case SCTP_PEER_AUTH_CHUNKS
:
5273 retval
= sctp_getsockopt_peer_auth_chunks(sk
, len
, optval
,
5276 case SCTP_LOCAL_AUTH_CHUNKS
:
5277 retval
= sctp_getsockopt_local_auth_chunks(sk
, len
, optval
,
5281 retval
= -ENOPROTOOPT
;
5285 sctp_release_sock(sk
);
5289 static void sctp_hash(struct sock
*sk
)
5294 static void sctp_unhash(struct sock
*sk
)
5299 /* Check if port is acceptable. Possibly find first available port.
5301 * The port hash table (contained in the 'global' SCTP protocol storage
5302 * returned by struct sctp_protocol *sctp_get_protocol()). The hash
5303 * table is an array of 4096 lists (sctp_bind_hashbucket). Each
5304 * list (the list number is the port number hashed out, so as you
5305 * would expect from a hash function, all the ports in a given list have
5306 * such a number that hashes out to the same list number; you were
5307 * expecting that, right?); so each list has a set of ports, with a
5308 * link to the socket (struct sock) that uses it, the port number and
5309 * a fastreuse flag (FIXME: NPI ipg).
5311 static struct sctp_bind_bucket
*sctp_bucket_create(
5312 struct sctp_bind_hashbucket
*head
, unsigned short snum
);
5314 static long sctp_get_port_local(struct sock
*sk
, union sctp_addr
*addr
)
5316 struct sctp_bind_hashbucket
*head
; /* hash list */
5317 struct sctp_bind_bucket
*pp
; /* hash list port iterator */
5318 struct hlist_node
*node
;
5319 unsigned short snum
;
5322 snum
= ntohs(addr
->v4
.sin_port
);
5324 SCTP_DEBUG_PRINTK("sctp_get_port() begins, snum=%d\n", snum
);
5325 sctp_local_bh_disable();
5328 /* Search for an available port. */
5329 int low
, high
, remaining
, index
;
5332 inet_get_local_port_range(&low
, &high
);
5333 remaining
= (high
- low
) + 1;
5334 rover
= net_random() % remaining
+ low
;
5338 if ((rover
< low
) || (rover
> high
))
5340 index
= sctp_phashfn(rover
);
5341 head
= &sctp_port_hashtable
[index
];
5342 sctp_spin_lock(&head
->lock
);
5343 sctp_for_each_hentry(pp
, node
, &head
->chain
)
5344 if (pp
->port
== rover
)
5348 sctp_spin_unlock(&head
->lock
);
5349 } while (--remaining
> 0);
5351 /* Exhausted local port range during search? */
5356 /* OK, here is the one we will use. HEAD (the port
5357 * hash table list entry) is non-NULL and we hold it's
5362 /* We are given an specific port number; we verify
5363 * that it is not being used. If it is used, we will
5364 * exahust the search in the hash list corresponding
5365 * to the port number (snum) - we detect that with the
5366 * port iterator, pp being NULL.
5368 head
= &sctp_port_hashtable
[sctp_phashfn(snum
)];
5369 sctp_spin_lock(&head
->lock
);
5370 sctp_for_each_hentry(pp
, node
, &head
->chain
) {
5371 if (pp
->port
== snum
)
5378 if (!hlist_empty(&pp
->owner
)) {
5379 /* We had a port hash table hit - there is an
5380 * available port (pp != NULL) and it is being
5381 * used by other socket (pp->owner not empty); that other
5382 * socket is going to be sk2.
5384 int reuse
= sk
->sk_reuse
;
5386 struct hlist_node
*node
;
5388 SCTP_DEBUG_PRINTK("sctp_get_port() found a possible match\n");
5389 if (pp
->fastreuse
&& sk
->sk_reuse
&&
5390 sk
->sk_state
!= SCTP_SS_LISTENING
)
5393 /* Run through the list of sockets bound to the port
5394 * (pp->port) [via the pointers bind_next and
5395 * bind_pprev in the struct sock *sk2 (pp->sk)]. On each one,
5396 * we get the endpoint they describe and run through
5397 * the endpoint's list of IP (v4 or v6) addresses,
5398 * comparing each of the addresses with the address of
5399 * the socket sk. If we find a match, then that means
5400 * that this port/socket (sk) combination are already
5403 sk_for_each_bound(sk2
, node
, &pp
->owner
) {
5404 struct sctp_endpoint
*ep2
;
5405 ep2
= sctp_sk(sk2
)->ep
;
5407 if (reuse
&& sk2
->sk_reuse
&&
5408 sk2
->sk_state
!= SCTP_SS_LISTENING
)
5411 if (sctp_bind_addr_match(&ep2
->base
.bind_addr
, addr
,
5417 SCTP_DEBUG_PRINTK("sctp_get_port(): Found a match\n");
5420 /* If there was a hash table miss, create a new port. */
5422 if (!pp
&& !(pp
= sctp_bucket_create(head
, snum
)))
5425 /* In either case (hit or miss), make sure fastreuse is 1 only
5426 * if sk->sk_reuse is too (that is, if the caller requested
5427 * SO_REUSEADDR on this socket -sk-).
5429 if (hlist_empty(&pp
->owner
)) {
5430 if (sk
->sk_reuse
&& sk
->sk_state
!= SCTP_SS_LISTENING
)
5434 } else if (pp
->fastreuse
&&
5435 (!sk
->sk_reuse
|| sk
->sk_state
== SCTP_SS_LISTENING
))
5438 /* We are set, so fill up all the data in the hash table
5439 * entry, tie the socket list information with the rest of the
5440 * sockets FIXME: Blurry, NPI (ipg).
5443 if (!sctp_sk(sk
)->bind_hash
) {
5444 inet_sk(sk
)->num
= snum
;
5445 sk_add_bind_node(sk
, &pp
->owner
);
5446 sctp_sk(sk
)->bind_hash
= pp
;
5451 sctp_spin_unlock(&head
->lock
);
5454 sctp_local_bh_enable();
5458 /* Assign a 'snum' port to the socket. If snum == 0, an ephemeral
5459 * port is requested.
5461 static int sctp_get_port(struct sock
*sk
, unsigned short snum
)
5464 union sctp_addr addr
;
5465 struct sctp_af
*af
= sctp_sk(sk
)->pf
->af
;
5467 /* Set up a dummy address struct from the sk. */
5468 af
->from_sk(&addr
, sk
);
5469 addr
.v4
.sin_port
= htons(snum
);
5471 /* Note: sk->sk_num gets filled in if ephemeral port request. */
5472 ret
= sctp_get_port_local(sk
, &addr
);
5474 return (ret
? 1 : 0);
5478 * 3.1.3 listen() - UDP Style Syntax
5480 * By default, new associations are not accepted for UDP style sockets.
5481 * An application uses listen() to mark a socket as being able to
5482 * accept new associations.
5484 SCTP_STATIC
int sctp_seqpacket_listen(struct sock
*sk
, int backlog
)
5486 struct sctp_sock
*sp
= sctp_sk(sk
);
5487 struct sctp_endpoint
*ep
= sp
->ep
;
5489 /* Only UDP style sockets that are not peeled off are allowed to
5492 if (!sctp_style(sk
, UDP
))
5495 /* If backlog is zero, disable listening. */
5497 if (sctp_sstate(sk
, CLOSED
))
5500 sctp_unhash_endpoint(ep
);
5501 sk
->sk_state
= SCTP_SS_CLOSED
;
5505 /* Return if we are already listening. */
5506 if (sctp_sstate(sk
, LISTENING
))
5510 * If a bind() or sctp_bindx() is not called prior to a listen()
5511 * call that allows new associations to be accepted, the system
5512 * picks an ephemeral port and will choose an address set equivalent
5513 * to binding with a wildcard address.
5515 * This is not currently spelled out in the SCTP sockets
5516 * extensions draft, but follows the practice as seen in TCP
5519 * Additionally, turn off fastreuse flag since we are not listening
5521 sk
->sk_state
= SCTP_SS_LISTENING
;
5522 if (!ep
->base
.bind_addr
.port
) {
5523 if (sctp_autobind(sk
))
5526 sctp_sk(sk
)->bind_hash
->fastreuse
= 0;
5528 sctp_hash_endpoint(ep
);
5533 * 4.1.3 listen() - TCP Style Syntax
5535 * Applications uses listen() to ready the SCTP endpoint for accepting
5536 * inbound associations.
5538 SCTP_STATIC
int sctp_stream_listen(struct sock
*sk
, int backlog
)
5540 struct sctp_sock
*sp
= sctp_sk(sk
);
5541 struct sctp_endpoint
*ep
= sp
->ep
;
5543 /* If backlog is zero, disable listening. */
5545 if (sctp_sstate(sk
, CLOSED
))
5548 sctp_unhash_endpoint(ep
);
5549 sk
->sk_state
= SCTP_SS_CLOSED
;
5553 if (sctp_sstate(sk
, LISTENING
))
5557 * If a bind() or sctp_bindx() is not called prior to a listen()
5558 * call that allows new associations to be accepted, the system
5559 * picks an ephemeral port and will choose an address set equivalent
5560 * to binding with a wildcard address.
5562 * This is not currently spelled out in the SCTP sockets
5563 * extensions draft, but follows the practice as seen in TCP
5566 sk
->sk_state
= SCTP_SS_LISTENING
;
5567 if (!ep
->base
.bind_addr
.port
) {
5568 if (sctp_autobind(sk
))
5571 sctp_sk(sk
)->bind_hash
->fastreuse
= 0;
5573 sk
->sk_max_ack_backlog
= backlog
;
5574 sctp_hash_endpoint(ep
);
5579 * Move a socket to LISTENING state.
5581 int sctp_inet_listen(struct socket
*sock
, int backlog
)
5583 struct sock
*sk
= sock
->sk
;
5584 struct crypto_hash
*tfm
= NULL
;
5587 if (unlikely(backlog
< 0))
5592 if (sock
->state
!= SS_UNCONNECTED
)
5595 /* Allocate HMAC for generating cookie. */
5596 if (sctp_hmac_alg
) {
5597 tfm
= crypto_alloc_hash(sctp_hmac_alg
, 0, CRYPTO_ALG_ASYNC
);
5599 if (net_ratelimit()) {
5601 "SCTP: failed to load transform for %s: %ld\n",
5602 sctp_hmac_alg
, PTR_ERR(tfm
));
5609 switch (sock
->type
) {
5610 case SOCK_SEQPACKET
:
5611 err
= sctp_seqpacket_listen(sk
, backlog
);
5614 err
= sctp_stream_listen(sk
, backlog
);
5623 /* Store away the transform reference. */
5624 sctp_sk(sk
)->hmac
= tfm
;
5626 sctp_release_sock(sk
);
5629 crypto_free_hash(tfm
);
5634 * This function is done by modeling the current datagram_poll() and the
5635 * tcp_poll(). Note that, based on these implementations, we don't
5636 * lock the socket in this function, even though it seems that,
5637 * ideally, locking or some other mechanisms can be used to ensure
5638 * the integrity of the counters (sndbuf and wmem_alloc) used
5639 * in this place. We assume that we don't need locks either until proven
5642 * Another thing to note is that we include the Async I/O support
5643 * here, again, by modeling the current TCP/UDP code. We don't have
5644 * a good way to test with it yet.
5646 unsigned int sctp_poll(struct file
*file
, struct socket
*sock
, poll_table
*wait
)
5648 struct sock
*sk
= sock
->sk
;
5649 struct sctp_sock
*sp
= sctp_sk(sk
);
5652 poll_wait(file
, sk
->sk_sleep
, wait
);
5654 /* A TCP-style listening socket becomes readable when the accept queue
5657 if (sctp_style(sk
, TCP
) && sctp_sstate(sk
, LISTENING
))
5658 return (!list_empty(&sp
->ep
->asocs
)) ?
5659 (POLLIN
| POLLRDNORM
) : 0;
5663 /* Is there any exceptional events? */
5664 if (sk
->sk_err
|| !skb_queue_empty(&sk
->sk_error_queue
))
5666 if (sk
->sk_shutdown
& RCV_SHUTDOWN
)
5668 if (sk
->sk_shutdown
== SHUTDOWN_MASK
)
5671 /* Is it readable? Reconsider this code with TCP-style support. */
5672 if (!skb_queue_empty(&sk
->sk_receive_queue
) ||
5673 (sk
->sk_shutdown
& RCV_SHUTDOWN
))
5674 mask
|= POLLIN
| POLLRDNORM
;
5676 /* The association is either gone or not ready. */
5677 if (!sctp_style(sk
, UDP
) && sctp_sstate(sk
, CLOSED
))
5680 /* Is it writable? */
5681 if (sctp_writeable(sk
)) {
5682 mask
|= POLLOUT
| POLLWRNORM
;
5684 set_bit(SOCK_ASYNC_NOSPACE
, &sk
->sk_socket
->flags
);
5686 * Since the socket is not locked, the buffer
5687 * might be made available after the writeable check and
5688 * before the bit is set. This could cause a lost I/O
5689 * signal. tcp_poll() has a race breaker for this race
5690 * condition. Based on their implementation, we put
5691 * in the following code to cover it as well.
5693 if (sctp_writeable(sk
))
5694 mask
|= POLLOUT
| POLLWRNORM
;
5699 /********************************************************************
5700 * 2nd Level Abstractions
5701 ********************************************************************/
5703 static struct sctp_bind_bucket
*sctp_bucket_create(
5704 struct sctp_bind_hashbucket
*head
, unsigned short snum
)
5706 struct sctp_bind_bucket
*pp
;
5708 pp
= kmem_cache_alloc(sctp_bucket_cachep
, GFP_ATOMIC
);
5709 SCTP_DBG_OBJCNT_INC(bind_bucket
);
5713 INIT_HLIST_HEAD(&pp
->owner
);
5714 hlist_add_head(&pp
->node
, &head
->chain
);
5719 /* Caller must hold hashbucket lock for this tb with local BH disabled */
5720 static void sctp_bucket_destroy(struct sctp_bind_bucket
*pp
)
5722 if (pp
&& hlist_empty(&pp
->owner
)) {
5723 __hlist_del(&pp
->node
);
5724 kmem_cache_free(sctp_bucket_cachep
, pp
);
5725 SCTP_DBG_OBJCNT_DEC(bind_bucket
);
5729 /* Release this socket's reference to a local port. */
5730 static inline void __sctp_put_port(struct sock
*sk
)
5732 struct sctp_bind_hashbucket
*head
=
5733 &sctp_port_hashtable
[sctp_phashfn(inet_sk(sk
)->num
)];
5734 struct sctp_bind_bucket
*pp
;
5736 sctp_spin_lock(&head
->lock
);
5737 pp
= sctp_sk(sk
)->bind_hash
;
5738 __sk_del_bind_node(sk
);
5739 sctp_sk(sk
)->bind_hash
= NULL
;
5740 inet_sk(sk
)->num
= 0;
5741 sctp_bucket_destroy(pp
);
5742 sctp_spin_unlock(&head
->lock
);
5745 void sctp_put_port(struct sock
*sk
)
5747 sctp_local_bh_disable();
5748 __sctp_put_port(sk
);
5749 sctp_local_bh_enable();
5753 * The system picks an ephemeral port and choose an address set equivalent
5754 * to binding with a wildcard address.
5755 * One of those addresses will be the primary address for the association.
5756 * This automatically enables the multihoming capability of SCTP.
5758 static int sctp_autobind(struct sock
*sk
)
5760 union sctp_addr autoaddr
;
5764 /* Initialize a local sockaddr structure to INADDR_ANY. */
5765 af
= sctp_sk(sk
)->pf
->af
;
5767 port
= htons(inet_sk(sk
)->num
);
5768 af
->inaddr_any(&autoaddr
, port
);
5770 return sctp_do_bind(sk
, &autoaddr
, af
->sockaddr_len
);
5773 /* Parse out IPPROTO_SCTP CMSG headers. Perform only minimal validation.
5776 * 4.2 The cmsghdr Structure *
5778 * When ancillary data is sent or received, any number of ancillary data
5779 * objects can be specified by the msg_control and msg_controllen members of
5780 * the msghdr structure, because each object is preceded by
5781 * a cmsghdr structure defining the object's length (the cmsg_len member).
5782 * Historically Berkeley-derived implementations have passed only one object
5783 * at a time, but this API allows multiple objects to be
5784 * passed in a single call to sendmsg() or recvmsg(). The following example
5785 * shows two ancillary data objects in a control buffer.
5787 * |<--------------------------- msg_controllen -------------------------->|
5790 * |<----- ancillary data object ----->|<----- ancillary data object ----->|
5792 * |<---------- CMSG_SPACE() --------->|<---------- CMSG_SPACE() --------->|
5795 * |<---------- cmsg_len ---------->| |<--------- cmsg_len ----------->| |
5797 * |<--------- CMSG_LEN() --------->| |<-------- CMSG_LEN() ---------->| |
5800 * +-----+-----+-----+--+-----------+--+-----+-----+-----+--+-----------+--+
5801 * |cmsg_|cmsg_|cmsg_|XX| |XX|cmsg_|cmsg_|cmsg_|XX| |XX|
5803 * |len |level|type |XX|cmsg_data[]|XX|len |level|type |XX|cmsg_data[]|XX|
5805 * +-----+-----+-----+--+-----------+--+-----+-----+-----+--+-----------+--+
5812 SCTP_STATIC
int sctp_msghdr_parse(const struct msghdr
*msg
,
5813 sctp_cmsgs_t
*cmsgs
)
5815 struct cmsghdr
*cmsg
;
5817 for (cmsg
= CMSG_FIRSTHDR(msg
);
5819 cmsg
= CMSG_NXTHDR((struct msghdr
*)msg
, cmsg
)) {
5820 if (!CMSG_OK(msg
, cmsg
))
5823 /* Should we parse this header or ignore? */
5824 if (cmsg
->cmsg_level
!= IPPROTO_SCTP
)
5827 /* Strictly check lengths following example in SCM code. */
5828 switch (cmsg
->cmsg_type
) {
5830 /* SCTP Socket API Extension
5831 * 5.2.1 SCTP Initiation Structure (SCTP_INIT)
5833 * This cmsghdr structure provides information for
5834 * initializing new SCTP associations with sendmsg().
5835 * The SCTP_INITMSG socket option uses this same data
5836 * structure. This structure is not used for
5839 * cmsg_level cmsg_type cmsg_data[]
5840 * ------------ ------------ ----------------------
5841 * IPPROTO_SCTP SCTP_INIT struct sctp_initmsg
5843 if (cmsg
->cmsg_len
!=
5844 CMSG_LEN(sizeof(struct sctp_initmsg
)))
5846 cmsgs
->init
= (struct sctp_initmsg
*)CMSG_DATA(cmsg
);
5850 /* SCTP Socket API Extension
5851 * 5.2.2 SCTP Header Information Structure(SCTP_SNDRCV)
5853 * This cmsghdr structure specifies SCTP options for
5854 * sendmsg() and describes SCTP header information
5855 * about a received message through recvmsg().
5857 * cmsg_level cmsg_type cmsg_data[]
5858 * ------------ ------------ ----------------------
5859 * IPPROTO_SCTP SCTP_SNDRCV struct sctp_sndrcvinfo
5861 if (cmsg
->cmsg_len
!=
5862 CMSG_LEN(sizeof(struct sctp_sndrcvinfo
)))
5866 (struct sctp_sndrcvinfo
*)CMSG_DATA(cmsg
);
5868 /* Minimally, validate the sinfo_flags. */
5869 if (cmsgs
->info
->sinfo_flags
&
5870 ~(SCTP_UNORDERED
| SCTP_ADDR_OVER
|
5871 SCTP_ABORT
| SCTP_EOF
))
5883 * Wait for a packet..
5884 * Note: This function is the same function as in core/datagram.c
5885 * with a few modifications to make lksctp work.
5887 static int sctp_wait_for_packet(struct sock
* sk
, int *err
, long *timeo_p
)
5892 prepare_to_wait_exclusive(sk
->sk_sleep
, &wait
, TASK_INTERRUPTIBLE
);
5894 /* Socket errors? */
5895 error
= sock_error(sk
);
5899 if (!skb_queue_empty(&sk
->sk_receive_queue
))
5902 /* Socket shut down? */
5903 if (sk
->sk_shutdown
& RCV_SHUTDOWN
)
5906 /* Sequenced packets can come disconnected. If so we report the
5911 /* Is there a good reason to think that we may receive some data? */
5912 if (list_empty(&sctp_sk(sk
)->ep
->asocs
) && !sctp_sstate(sk
, LISTENING
))
5915 /* Handle signals. */
5916 if (signal_pending(current
))
5919 /* Let another process have a go. Since we are going to sleep
5920 * anyway. Note: This may cause odd behaviors if the message
5921 * does not fit in the user's buffer, but this seems to be the
5922 * only way to honor MSG_DONTWAIT realistically.
5924 sctp_release_sock(sk
);
5925 *timeo_p
= schedule_timeout(*timeo_p
);
5929 finish_wait(sk
->sk_sleep
, &wait
);
5933 error
= sock_intr_errno(*timeo_p
);
5936 finish_wait(sk
->sk_sleep
, &wait
);
5941 /* Receive a datagram.
5942 * Note: This is pretty much the same routine as in core/datagram.c
5943 * with a few changes to make lksctp work.
5945 static struct sk_buff
*sctp_skb_recv_datagram(struct sock
*sk
, int flags
,
5946 int noblock
, int *err
)
5949 struct sk_buff
*skb
;
5952 timeo
= sock_rcvtimeo(sk
, noblock
);
5954 SCTP_DEBUG_PRINTK("Timeout: timeo: %ld, MAX: %ld.\n",
5955 timeo
, MAX_SCHEDULE_TIMEOUT
);
5958 /* Again only user level code calls this function,
5959 * so nothing interrupt level
5960 * will suddenly eat the receive_queue.
5962 * Look at current nfs client by the way...
5963 * However, this function was corrent in any case. 8)
5965 if (flags
& MSG_PEEK
) {
5966 spin_lock_bh(&sk
->sk_receive_queue
.lock
);
5967 skb
= skb_peek(&sk
->sk_receive_queue
);
5969 atomic_inc(&skb
->users
);
5970 spin_unlock_bh(&sk
->sk_receive_queue
.lock
);
5972 skb
= skb_dequeue(&sk
->sk_receive_queue
);
5978 /* Caller is allowed not to check sk->sk_err before calling. */
5979 error
= sock_error(sk
);
5983 if (sk
->sk_shutdown
& RCV_SHUTDOWN
)
5986 /* User doesn't want to wait. */
5990 } while (sctp_wait_for_packet(sk
, err
, &timeo
) == 0);
5999 /* If sndbuf has changed, wake up per association sndbuf waiters. */
6000 static void __sctp_write_space(struct sctp_association
*asoc
)
6002 struct sock
*sk
= asoc
->base
.sk
;
6003 struct socket
*sock
= sk
->sk_socket
;
6005 if ((sctp_wspace(asoc
) > 0) && sock
) {
6006 if (waitqueue_active(&asoc
->wait
))
6007 wake_up_interruptible(&asoc
->wait
);
6009 if (sctp_writeable(sk
)) {
6010 if (sk
->sk_sleep
&& waitqueue_active(sk
->sk_sleep
))
6011 wake_up_interruptible(sk
->sk_sleep
);
6013 /* Note that we try to include the Async I/O support
6014 * here by modeling from the current TCP/UDP code.
6015 * We have not tested with it yet.
6017 if (sock
->fasync_list
&&
6018 !(sk
->sk_shutdown
& SEND_SHUTDOWN
))
6019 sock_wake_async(sock
,
6020 SOCK_WAKE_SPACE
, POLL_OUT
);
6025 /* Do accounting for the sndbuf space.
6026 * Decrement the used sndbuf space of the corresponding association by the
6027 * data size which was just transmitted(freed).
6029 static void sctp_wfree(struct sk_buff
*skb
)
6031 struct sctp_association
*asoc
;
6032 struct sctp_chunk
*chunk
;
6035 /* Get the saved chunk pointer. */
6036 chunk
= *((struct sctp_chunk
**)(skb
->cb
));
6039 asoc
->sndbuf_used
-= SCTP_DATA_SNDSIZE(chunk
) +
6040 sizeof(struct sk_buff
) +
6041 sizeof(struct sctp_chunk
);
6043 atomic_sub(sizeof(struct sctp_chunk
), &sk
->sk_wmem_alloc
);
6046 * This undoes what is done via sctp_set_owner_w and sk_mem_charge
6048 sk
->sk_wmem_queued
-= skb
->truesize
;
6049 sk_mem_uncharge(sk
, skb
->truesize
);
6052 __sctp_write_space(asoc
);
6054 sctp_association_put(asoc
);
6057 /* Do accounting for the receive space on the socket.
6058 * Accounting for the association is done in ulpevent.c
6059 * We set this as a destructor for the cloned data skbs so that
6060 * accounting is done at the correct time.
6062 void sctp_sock_rfree(struct sk_buff
*skb
)
6064 struct sock
*sk
= skb
->sk
;
6065 struct sctp_ulpevent
*event
= sctp_skb2event(skb
);
6067 atomic_sub(event
->rmem_len
, &sk
->sk_rmem_alloc
);
6070 * Mimic the behavior of sock_rfree
6072 sk_mem_uncharge(sk
, event
->rmem_len
);
6076 /* Helper function to wait for space in the sndbuf. */
6077 static int sctp_wait_for_sndbuf(struct sctp_association
*asoc
, long *timeo_p
,
6080 struct sock
*sk
= asoc
->base
.sk
;
6082 long current_timeo
= *timeo_p
;
6085 SCTP_DEBUG_PRINTK("wait_for_sndbuf: asoc=%p, timeo=%ld, msg_len=%zu\n",
6086 asoc
, (long)(*timeo_p
), msg_len
);
6088 /* Increment the association's refcnt. */
6089 sctp_association_hold(asoc
);
6091 /* Wait on the association specific sndbuf space. */
6093 prepare_to_wait_exclusive(&asoc
->wait
, &wait
,
6094 TASK_INTERRUPTIBLE
);
6097 if (sk
->sk_err
|| asoc
->state
>= SCTP_STATE_SHUTDOWN_PENDING
||
6100 if (signal_pending(current
))
6101 goto do_interrupted
;
6102 if (msg_len
<= sctp_wspace(asoc
))
6105 /* Let another process have a go. Since we are going
6108 sctp_release_sock(sk
);
6109 current_timeo
= schedule_timeout(current_timeo
);
6110 BUG_ON(sk
!= asoc
->base
.sk
);
6113 *timeo_p
= current_timeo
;
6117 finish_wait(&asoc
->wait
, &wait
);
6119 /* Release the association's refcnt. */
6120 sctp_association_put(asoc
);
6129 err
= sock_intr_errno(*timeo_p
);
6137 /* If socket sndbuf has changed, wake up all per association waiters. */
6138 void sctp_write_space(struct sock
*sk
)
6140 struct sctp_association
*asoc
;
6141 struct list_head
*pos
;
6143 /* Wake up the tasks in each wait queue. */
6144 list_for_each(pos
, &((sctp_sk(sk
))->ep
->asocs
)) {
6145 asoc
= list_entry(pos
, struct sctp_association
, asocs
);
6146 __sctp_write_space(asoc
);
6150 /* Is there any sndbuf space available on the socket?
6152 * Note that sk_wmem_alloc is the sum of the send buffers on all of the
6153 * associations on the same socket. For a UDP-style socket with
6154 * multiple associations, it is possible for it to be "unwriteable"
6155 * prematurely. I assume that this is acceptable because
6156 * a premature "unwriteable" is better than an accidental "writeable" which
6157 * would cause an unwanted block under certain circumstances. For the 1-1
6158 * UDP-style sockets or TCP-style sockets, this code should work.
6161 static int sctp_writeable(struct sock
*sk
)
6165 amt
= sk
->sk_sndbuf
- atomic_read(&sk
->sk_wmem_alloc
);
6171 /* Wait for an association to go into ESTABLISHED state. If timeout is 0,
6172 * returns immediately with EINPROGRESS.
6174 static int sctp_wait_for_connect(struct sctp_association
*asoc
, long *timeo_p
)
6176 struct sock
*sk
= asoc
->base
.sk
;
6178 long current_timeo
= *timeo_p
;
6181 SCTP_DEBUG_PRINTK("%s: asoc=%p, timeo=%ld\n", __FUNCTION__
, asoc
,
6184 /* Increment the association's refcnt. */
6185 sctp_association_hold(asoc
);
6188 prepare_to_wait_exclusive(&asoc
->wait
, &wait
,
6189 TASK_INTERRUPTIBLE
);
6192 if (sk
->sk_shutdown
& RCV_SHUTDOWN
)
6194 if (sk
->sk_err
|| asoc
->state
>= SCTP_STATE_SHUTDOWN_PENDING
||
6197 if (signal_pending(current
))
6198 goto do_interrupted
;
6200 if (sctp_state(asoc
, ESTABLISHED
))
6203 /* Let another process have a go. Since we are going
6206 sctp_release_sock(sk
);
6207 current_timeo
= schedule_timeout(current_timeo
);
6210 *timeo_p
= current_timeo
;
6214 finish_wait(&asoc
->wait
, &wait
);
6216 /* Release the association's refcnt. */
6217 sctp_association_put(asoc
);
6222 if (asoc
->init_err_counter
+ 1 > asoc
->max_init_attempts
)
6225 err
= -ECONNREFUSED
;
6229 err
= sock_intr_errno(*timeo_p
);
6237 static int sctp_wait_for_accept(struct sock
*sk
, long timeo
)
6239 struct sctp_endpoint
*ep
;
6243 ep
= sctp_sk(sk
)->ep
;
6247 prepare_to_wait_exclusive(sk
->sk_sleep
, &wait
,
6248 TASK_INTERRUPTIBLE
);
6250 if (list_empty(&ep
->asocs
)) {
6251 sctp_release_sock(sk
);
6252 timeo
= schedule_timeout(timeo
);
6257 if (!sctp_sstate(sk
, LISTENING
))
6261 if (!list_empty(&ep
->asocs
))
6264 err
= sock_intr_errno(timeo
);
6265 if (signal_pending(current
))
6273 finish_wait(sk
->sk_sleep
, &wait
);
6278 static void sctp_wait_for_close(struct sock
*sk
, long timeout
)
6283 prepare_to_wait(sk
->sk_sleep
, &wait
, TASK_INTERRUPTIBLE
);
6284 if (list_empty(&sctp_sk(sk
)->ep
->asocs
))
6286 sctp_release_sock(sk
);
6287 timeout
= schedule_timeout(timeout
);
6289 } while (!signal_pending(current
) && timeout
);
6291 finish_wait(sk
->sk_sleep
, &wait
);
6294 static void sctp_sock_rfree_frag(struct sk_buff
*skb
)
6296 struct sk_buff
*frag
;
6301 /* Don't forget the fragments. */
6302 for (frag
= skb_shinfo(skb
)->frag_list
; frag
; frag
= frag
->next
)
6303 sctp_sock_rfree_frag(frag
);
6306 sctp_sock_rfree(skb
);
6309 static void sctp_skb_set_owner_r_frag(struct sk_buff
*skb
, struct sock
*sk
)
6311 struct sk_buff
*frag
;
6316 /* Don't forget the fragments. */
6317 for (frag
= skb_shinfo(skb
)->frag_list
; frag
; frag
= frag
->next
)
6318 sctp_skb_set_owner_r_frag(frag
, sk
);
6321 sctp_skb_set_owner_r(skb
, sk
);
6324 /* Populate the fields of the newsk from the oldsk and migrate the assoc
6325 * and its messages to the newsk.
6327 static void sctp_sock_migrate(struct sock
*oldsk
, struct sock
*newsk
,
6328 struct sctp_association
*assoc
,
6329 sctp_socket_type_t type
)
6331 struct sctp_sock
*oldsp
= sctp_sk(oldsk
);
6332 struct sctp_sock
*newsp
= sctp_sk(newsk
);
6333 struct sctp_bind_bucket
*pp
; /* hash list port iterator */
6334 struct sctp_endpoint
*newep
= newsp
->ep
;
6335 struct sk_buff
*skb
, *tmp
;
6336 struct sctp_ulpevent
*event
;
6337 struct sctp_bind_hashbucket
*head
;
6339 /* Migrate socket buffer sizes and all the socket level options to the
6342 newsk
->sk_sndbuf
= oldsk
->sk_sndbuf
;
6343 newsk
->sk_rcvbuf
= oldsk
->sk_rcvbuf
;
6344 /* Brute force copy old sctp opt. */
6345 inet_sk_copy_descendant(newsk
, oldsk
);
6347 /* Restore the ep value that was overwritten with the above structure
6353 /* Hook this new socket in to the bind_hash list. */
6354 head
= &sctp_port_hashtable
[sctp_phashfn(inet_sk(oldsk
)->num
)];
6355 sctp_local_bh_disable();
6356 sctp_spin_lock(&head
->lock
);
6357 pp
= sctp_sk(oldsk
)->bind_hash
;
6358 sk_add_bind_node(newsk
, &pp
->owner
);
6359 sctp_sk(newsk
)->bind_hash
= pp
;
6360 inet_sk(newsk
)->num
= inet_sk(oldsk
)->num
;
6361 sctp_spin_unlock(&head
->lock
);
6362 sctp_local_bh_enable();
6364 /* Copy the bind_addr list from the original endpoint to the new
6365 * endpoint so that we can handle restarts properly
6367 sctp_bind_addr_dup(&newsp
->ep
->base
.bind_addr
,
6368 &oldsp
->ep
->base
.bind_addr
, GFP_KERNEL
);
6370 /* Move any messages in the old socket's receive queue that are for the
6371 * peeled off association to the new socket's receive queue.
6373 sctp_skb_for_each(skb
, &oldsk
->sk_receive_queue
, tmp
) {
6374 event
= sctp_skb2event(skb
);
6375 if (event
->asoc
== assoc
) {
6376 sctp_sock_rfree_frag(skb
);
6377 __skb_unlink(skb
, &oldsk
->sk_receive_queue
);
6378 __skb_queue_tail(&newsk
->sk_receive_queue
, skb
);
6379 sctp_skb_set_owner_r_frag(skb
, newsk
);
6383 /* Clean up any messages pending delivery due to partial
6384 * delivery. Three cases:
6385 * 1) No partial deliver; no work.
6386 * 2) Peeling off partial delivery; keep pd_lobby in new pd_lobby.
6387 * 3) Peeling off non-partial delivery; move pd_lobby to receive_queue.
6389 skb_queue_head_init(&newsp
->pd_lobby
);
6390 atomic_set(&sctp_sk(newsk
)->pd_mode
, assoc
->ulpq
.pd_mode
);
6392 if (atomic_read(&sctp_sk(oldsk
)->pd_mode
)) {
6393 struct sk_buff_head
*queue
;
6395 /* Decide which queue to move pd_lobby skbs to. */
6396 if (assoc
->ulpq
.pd_mode
) {
6397 queue
= &newsp
->pd_lobby
;
6399 queue
= &newsk
->sk_receive_queue
;
6401 /* Walk through the pd_lobby, looking for skbs that
6402 * need moved to the new socket.
6404 sctp_skb_for_each(skb
, &oldsp
->pd_lobby
, tmp
) {
6405 event
= sctp_skb2event(skb
);
6406 if (event
->asoc
== assoc
) {
6407 sctp_sock_rfree_frag(skb
);
6408 __skb_unlink(skb
, &oldsp
->pd_lobby
);
6409 __skb_queue_tail(queue
, skb
);
6410 sctp_skb_set_owner_r_frag(skb
, newsk
);
6414 /* Clear up any skbs waiting for the partial
6415 * delivery to finish.
6417 if (assoc
->ulpq
.pd_mode
)
6418 sctp_clear_pd(oldsk
, NULL
);
6422 sctp_skb_for_each(skb
, &assoc
->ulpq
.reasm
, tmp
) {
6423 sctp_sock_rfree_frag(skb
);
6424 sctp_skb_set_owner_r_frag(skb
, newsk
);
6427 sctp_skb_for_each(skb
, &assoc
->ulpq
.lobby
, tmp
) {
6428 sctp_sock_rfree_frag(skb
);
6429 sctp_skb_set_owner_r_frag(skb
, newsk
);
6432 /* Set the type of socket to indicate that it is peeled off from the
6433 * original UDP-style socket or created with the accept() call on a
6434 * TCP-style socket..
6438 /* Mark the new socket "in-use" by the user so that any packets
6439 * that may arrive on the association after we've moved it are
6440 * queued to the backlog. This prevents a potential race between
6441 * backlog processing on the old socket and new-packet processing
6442 * on the new socket.
6444 * The caller has just allocated newsk so we can guarantee that other
6445 * paths won't try to lock it and then oldsk.
6447 lock_sock_nested(newsk
, SINGLE_DEPTH_NESTING
);
6448 sctp_assoc_migrate(assoc
, newsk
);
6450 /* If the association on the newsk is already closed before accept()
6451 * is called, set RCV_SHUTDOWN flag.
6453 if (sctp_state(assoc
, CLOSED
) && sctp_style(newsk
, TCP
))
6454 newsk
->sk_shutdown
|= RCV_SHUTDOWN
;
6456 newsk
->sk_state
= SCTP_SS_ESTABLISHED
;
6457 sctp_release_sock(newsk
);
6461 DEFINE_PROTO_INUSE(sctp
)
6463 /* This proto struct describes the ULP interface for SCTP. */
6464 struct proto sctp_prot
= {
6466 .owner
= THIS_MODULE
,
6467 .close
= sctp_close
,
6468 .connect
= sctp_connect
,
6469 .disconnect
= sctp_disconnect
,
6470 .accept
= sctp_accept
,
6471 .ioctl
= sctp_ioctl
,
6472 .init
= sctp_init_sock
,
6473 .destroy
= sctp_destroy_sock
,
6474 .shutdown
= sctp_shutdown
,
6475 .setsockopt
= sctp_setsockopt
,
6476 .getsockopt
= sctp_getsockopt
,
6477 .sendmsg
= sctp_sendmsg
,
6478 .recvmsg
= sctp_recvmsg
,
6480 .backlog_rcv
= sctp_backlog_rcv
,
6482 .unhash
= sctp_unhash
,
6483 .get_port
= sctp_get_port
,
6484 .obj_size
= sizeof(struct sctp_sock
),
6485 .sysctl_mem
= sysctl_sctp_mem
,
6486 .sysctl_rmem
= sysctl_sctp_rmem
,
6487 .sysctl_wmem
= sysctl_sctp_wmem
,
6488 .memory_pressure
= &sctp_memory_pressure
,
6489 .enter_memory_pressure
= sctp_enter_memory_pressure
,
6490 .memory_allocated
= &sctp_memory_allocated
,
6491 .sockets_allocated
= &sctp_sockets_allocated
,
6492 REF_PROTO_INUSE(sctp
)
6495 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
6496 DEFINE_PROTO_INUSE(sctpv6
)
6498 struct proto sctpv6_prot
= {
6500 .owner
= THIS_MODULE
,
6501 .close
= sctp_close
,
6502 .connect
= sctp_connect
,
6503 .disconnect
= sctp_disconnect
,
6504 .accept
= sctp_accept
,
6505 .ioctl
= sctp_ioctl
,
6506 .init
= sctp_init_sock
,
6507 .destroy
= sctp_destroy_sock
,
6508 .shutdown
= sctp_shutdown
,
6509 .setsockopt
= sctp_setsockopt
,
6510 .getsockopt
= sctp_getsockopt
,
6511 .sendmsg
= sctp_sendmsg
,
6512 .recvmsg
= sctp_recvmsg
,
6514 .backlog_rcv
= sctp_backlog_rcv
,
6516 .unhash
= sctp_unhash
,
6517 .get_port
= sctp_get_port
,
6518 .obj_size
= sizeof(struct sctp6_sock
),
6519 .sysctl_mem
= sysctl_sctp_mem
,
6520 .sysctl_rmem
= sysctl_sctp_rmem
,
6521 .sysctl_wmem
= sysctl_sctp_wmem
,
6522 .memory_pressure
= &sctp_memory_pressure
,
6523 .enter_memory_pressure
= sctp_enter_memory_pressure
,
6524 .memory_allocated
= &sctp_memory_allocated
,
6525 .sockets_allocated
= &sctp_sockets_allocated
,
6526 REF_PROTO_INUSE(sctpv6
)
6528 #endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */