1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* SCTP kernel implementation
3 * (C) Copyright IBM Corp. 2001, 2004
4 * Copyright (c) 1999-2000 Cisco, Inc.
5 * Copyright (c) 1999-2001 Motorola, Inc.
6 * Copyright (c) 2001-2003 Intel Corp.
7 * Copyright (c) 2001-2002 Nokia, Inc.
8 * Copyright (c) 2001 La Monte H.P. Yarroll
10 * This file is part of the SCTP kernel implementation
12 * These functions interface with the sockets layer to implement the
13 * SCTP Extensions for the Sockets API.
15 * Note that the descriptions from the specification are USER level
16 * functions--this file is the functions which populate the struct proto
17 * for SCTP which is the BOTTOM of the sockets interface.
19 * Please send any bug reports or fixes you make to the
21 * lksctp developers <linux-sctp@vger.kernel.org>
23 * Written or modified by:
24 * La Monte H.P. Yarroll <piggy@acm.org>
25 * Narasimha Budihal <narsi@refcode.org>
26 * Karl Knutson <karl@athena.chicago.il.us>
27 * Jon Grimm <jgrimm@us.ibm.com>
28 * Xingang Guo <xingang.guo@intel.com>
29 * Daisy Chang <daisyc@us.ibm.com>
30 * Sridhar Samudrala <samudrala@us.ibm.com>
31 * Inaky Perez-Gonzalez <inaky.gonzalez@intel.com>
32 * Ardelle Fan <ardelle.fan@intel.com>
33 * Ryan Layer <rmlayer@us.ibm.com>
34 * Anup Pemmaiah <pemmaiah@cc.usu.edu>
35 * Kevin Gao <kevin.gao@intel.com>
38 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
40 #include <crypto/hash.h>
41 #include <linux/types.h>
42 #include <linux/kernel.h>
43 #include <linux/wait.h>
44 #include <linux/time.h>
45 #include <linux/sched/signal.h>
47 #include <linux/capability.h>
48 #include <linux/fcntl.h>
49 #include <linux/poll.h>
50 #include <linux/init.h>
51 #include <linux/slab.h>
52 #include <linux/file.h>
53 #include <linux/compat.h>
54 #include <linux/rhashtable.h>
58 #include <net/route.h>
60 #include <net/inet_common.h>
61 #include <net/busy_poll.h>
63 #include <linux/socket.h> /* for sa_family_t */
64 #include <linux/export.h>
66 #include <net/sctp/sctp.h>
67 #include <net/sctp/sm.h>
68 #include <net/sctp/stream_sched.h>
70 /* Forward declarations for internal helper functions. */
71 static bool sctp_writeable(struct sock
*sk
);
72 static void sctp_wfree(struct sk_buff
*skb
);
73 static int sctp_wait_for_sndbuf(struct sctp_association
*asoc
, long *timeo_p
,
75 static int sctp_wait_for_packet(struct sock
*sk
, int *err
, long *timeo_p
);
76 static int sctp_wait_for_connect(struct sctp_association
*, long *timeo_p
);
77 static int sctp_wait_for_accept(struct sock
*sk
, long timeo
);
78 static void sctp_wait_for_close(struct sock
*sk
, long timeo
);
79 static void sctp_destruct_sock(struct sock
*sk
);
80 static struct sctp_af
*sctp_sockaddr_af(struct sctp_sock
*opt
,
81 union sctp_addr
*addr
, int len
);
82 static int sctp_bindx_add(struct sock
*, struct sockaddr
*, int);
83 static int sctp_bindx_rem(struct sock
*, struct sockaddr
*, int);
84 static int sctp_send_asconf_add_ip(struct sock
*, struct sockaddr
*, int);
85 static int sctp_send_asconf_del_ip(struct sock
*, struct sockaddr
*, int);
86 static int sctp_send_asconf(struct sctp_association
*asoc
,
87 struct sctp_chunk
*chunk
);
88 static int sctp_do_bind(struct sock
*, union sctp_addr
*, int);
89 static int sctp_autobind(struct sock
*sk
);
90 static int sctp_sock_migrate(struct sock
*oldsk
, struct sock
*newsk
,
91 struct sctp_association
*assoc
,
92 enum sctp_socket_type type
);
94 static unsigned long sctp_memory_pressure
;
95 static atomic_long_t sctp_memory_allocated
;
96 struct percpu_counter sctp_sockets_allocated
;
98 static void sctp_enter_memory_pressure(struct sock
*sk
)
100 sctp_memory_pressure
= 1;
104 /* Get the sndbuf space available at the time on the association. */
105 static inline int sctp_wspace(struct sctp_association
*asoc
)
107 struct sock
*sk
= asoc
->base
.sk
;
109 return asoc
->ep
->sndbuf_policy
? sk
->sk_sndbuf
- asoc
->sndbuf_used
110 : sk_stream_wspace(sk
);
113 /* Increment the used sndbuf space count of the corresponding association by
114 * the size of the outgoing data chunk.
115 * Also, set the skb destructor for sndbuf accounting later.
117 * Since it is always 1-1 between chunk and skb, and also a new skb is always
118 * allocated for chunk bundling in sctp_packet_transmit(), we can use the
119 * destructor in the data chunk skb for the purpose of the sndbuf space
122 static inline void sctp_set_owner_w(struct sctp_chunk
*chunk
)
124 struct sctp_association
*asoc
= chunk
->asoc
;
125 struct sock
*sk
= asoc
->base
.sk
;
127 /* The sndbuf space is tracked per association. */
128 sctp_association_hold(asoc
);
131 sctp_auth_shkey_hold(chunk
->shkey
);
133 skb_set_owner_w(chunk
->skb
, sk
);
135 chunk
->skb
->destructor
= sctp_wfree
;
136 /* Save the chunk pointer in skb for sctp_wfree to use later. */
137 skb_shinfo(chunk
->skb
)->destructor_arg
= chunk
;
139 refcount_add(sizeof(struct sctp_chunk
), &sk
->sk_wmem_alloc
);
140 asoc
->sndbuf_used
+= chunk
->skb
->truesize
+ sizeof(struct sctp_chunk
);
141 sk
->sk_wmem_queued
+= chunk
->skb
->truesize
+ sizeof(struct sctp_chunk
);
142 sk_mem_charge(sk
, chunk
->skb
->truesize
);
145 static void sctp_clear_owner_w(struct sctp_chunk
*chunk
)
147 skb_orphan(chunk
->skb
);
150 static void sctp_for_each_tx_datachunk(struct sctp_association
*asoc
,
151 void (*cb
)(struct sctp_chunk
*))
154 struct sctp_outq
*q
= &asoc
->outqueue
;
155 struct sctp_transport
*t
;
156 struct sctp_chunk
*chunk
;
158 list_for_each_entry(t
, &asoc
->peer
.transport_addr_list
, transports
)
159 list_for_each_entry(chunk
, &t
->transmitted
, transmitted_list
)
162 list_for_each_entry(chunk
, &q
->retransmit
, transmitted_list
)
165 list_for_each_entry(chunk
, &q
->sacked
, transmitted_list
)
168 list_for_each_entry(chunk
, &q
->abandoned
, transmitted_list
)
171 list_for_each_entry(chunk
, &q
->out_chunk_list
, list
)
175 static void sctp_for_each_rx_skb(struct sctp_association
*asoc
, struct sock
*sk
,
176 void (*cb
)(struct sk_buff
*, struct sock
*))
179 struct sk_buff
*skb
, *tmp
;
181 sctp_skb_for_each(skb
, &asoc
->ulpq
.lobby
, tmp
)
184 sctp_skb_for_each(skb
, &asoc
->ulpq
.reasm
, tmp
)
187 sctp_skb_for_each(skb
, &asoc
->ulpq
.reasm_uo
, tmp
)
191 /* Verify that this is a valid address. */
192 static inline int sctp_verify_addr(struct sock
*sk
, union sctp_addr
*addr
,
197 /* Verify basic sockaddr. */
198 af
= sctp_sockaddr_af(sctp_sk(sk
), addr
, len
);
202 /* Is this a valid SCTP address? */
203 if (!af
->addr_valid(addr
, sctp_sk(sk
), NULL
))
206 if (!sctp_sk(sk
)->pf
->send_verify(sctp_sk(sk
), (addr
)))
212 /* Look up the association by its id. If this is not a UDP-style
213 * socket, the ID field is always ignored.
215 struct sctp_association
*sctp_id2assoc(struct sock
*sk
, sctp_assoc_t id
)
217 struct sctp_association
*asoc
= NULL
;
219 /* If this is not a UDP-style socket, assoc id should be ignored. */
220 if (!sctp_style(sk
, UDP
)) {
221 /* Return NULL if the socket state is not ESTABLISHED. It
222 * could be a TCP-style listening socket or a socket which
223 * hasn't yet called connect() to establish an association.
225 if (!sctp_sstate(sk
, ESTABLISHED
) && !sctp_sstate(sk
, CLOSING
))
228 /* Get the first and the only association from the list. */
229 if (!list_empty(&sctp_sk(sk
)->ep
->asocs
))
230 asoc
= list_entry(sctp_sk(sk
)->ep
->asocs
.next
,
231 struct sctp_association
, asocs
);
235 /* Otherwise this is a UDP-style socket. */
236 if (id
<= SCTP_ALL_ASSOC
)
239 spin_lock_bh(&sctp_assocs_id_lock
);
240 asoc
= (struct sctp_association
*)idr_find(&sctp_assocs_id
, (int)id
);
241 if (asoc
&& (asoc
->base
.sk
!= sk
|| asoc
->base
.dead
))
243 spin_unlock_bh(&sctp_assocs_id_lock
);
248 /* Look up the transport from an address and an assoc id. If both address and
249 * id are specified, the associations matching the address and the id should be
252 static struct sctp_transport
*sctp_addr_id2transport(struct sock
*sk
,
253 struct sockaddr_storage
*addr
,
256 struct sctp_association
*addr_asoc
= NULL
, *id_asoc
= NULL
;
257 struct sctp_af
*af
= sctp_get_af_specific(addr
->ss_family
);
258 union sctp_addr
*laddr
= (union sctp_addr
*)addr
;
259 struct sctp_transport
*transport
;
261 if (!af
|| sctp_verify_addr(sk
, laddr
, af
->sockaddr_len
))
264 addr_asoc
= sctp_endpoint_lookup_assoc(sctp_sk(sk
)->ep
,
271 id_asoc
= sctp_id2assoc(sk
, id
);
272 if (id_asoc
&& (id_asoc
!= addr_asoc
))
275 sctp_get_pf_specific(sk
->sk_family
)->addr_to_user(sctp_sk(sk
),
276 (union sctp_addr
*)addr
);
281 /* API 3.1.2 bind() - UDP Style Syntax
282 * The syntax of bind() is,
284 * ret = bind(int sd, struct sockaddr *addr, int addrlen);
286 * sd - the socket descriptor returned by socket().
287 * addr - the address structure (struct sockaddr_in or struct
288 * sockaddr_in6 [RFC 2553]),
289 * addr_len - the size of the address structure.
291 static int sctp_bind(struct sock
*sk
, struct sockaddr
*addr
, int addr_len
)
297 pr_debug("%s: sk:%p, addr:%p, addr_len:%d\n", __func__
, sk
,
300 /* Disallow binding twice. */
301 if (!sctp_sk(sk
)->ep
->base
.bind_addr
.port
)
302 retval
= sctp_do_bind(sk
, (union sctp_addr
*)addr
,
312 static int sctp_get_port_local(struct sock
*, union sctp_addr
*);
314 /* Verify this is a valid sockaddr. */
315 static struct sctp_af
*sctp_sockaddr_af(struct sctp_sock
*opt
,
316 union sctp_addr
*addr
, int len
)
320 /* Check minimum size. */
321 if (len
< sizeof (struct sockaddr
))
324 if (!opt
->pf
->af_supported(addr
->sa
.sa_family
, opt
))
327 if (addr
->sa
.sa_family
== AF_INET6
) {
328 if (len
< SIN6_LEN_RFC2133
)
330 /* V4 mapped address are really of AF_INET family */
331 if (ipv6_addr_v4mapped(&addr
->v6
.sin6_addr
) &&
332 !opt
->pf
->af_supported(AF_INET
, opt
))
336 /* If we get this far, af is valid. */
337 af
= sctp_get_af_specific(addr
->sa
.sa_family
);
339 if (len
< af
->sockaddr_len
)
345 /* Bind a local address either to an endpoint or to an association. */
346 static int sctp_do_bind(struct sock
*sk
, union sctp_addr
*addr
, int len
)
348 struct net
*net
= sock_net(sk
);
349 struct sctp_sock
*sp
= sctp_sk(sk
);
350 struct sctp_endpoint
*ep
= sp
->ep
;
351 struct sctp_bind_addr
*bp
= &ep
->base
.bind_addr
;
356 /* Common sockaddr verification. */
357 af
= sctp_sockaddr_af(sp
, addr
, len
);
359 pr_debug("%s: sk:%p, newaddr:%p, len:%d EINVAL\n",
360 __func__
, sk
, addr
, len
);
364 snum
= ntohs(addr
->v4
.sin_port
);
366 pr_debug("%s: sk:%p, new addr:%pISc, port:%d, new port:%d, len:%d\n",
367 __func__
, sk
, &addr
->sa
, bp
->port
, snum
, len
);
369 /* PF specific bind() address verification. */
370 if (!sp
->pf
->bind_verify(sp
, addr
))
371 return -EADDRNOTAVAIL
;
373 /* We must either be unbound, or bind to the same port.
374 * It's OK to allow 0 ports if we are already bound.
375 * We'll just inhert an already bound port in this case
380 else if (snum
!= bp
->port
) {
381 pr_debug("%s: new port %d doesn't match existing port "
382 "%d\n", __func__
, snum
, bp
->port
);
387 if (snum
&& snum
< inet_prot_sock(net
) &&
388 !ns_capable(net
->user_ns
, CAP_NET_BIND_SERVICE
))
391 /* See if the address matches any of the addresses we may have
392 * already bound before checking against other endpoints.
394 if (sctp_bind_addr_match(bp
, addr
, sp
))
397 /* Make sure we are allowed to bind here.
398 * The function sctp_get_port_local() does duplicate address
401 addr
->v4
.sin_port
= htons(snum
);
402 if (sctp_get_port_local(sk
, addr
))
405 /* Refresh ephemeral port. */
407 bp
->port
= inet_sk(sk
)->inet_num
;
409 /* Add the address to the bind address list.
410 * Use GFP_ATOMIC since BHs will be disabled.
412 ret
= sctp_add_bind_addr(bp
, addr
, af
->sockaddr_len
,
413 SCTP_ADDR_SRC
, GFP_ATOMIC
);
419 /* Copy back into socket for getsockname() use. */
420 inet_sk(sk
)->inet_sport
= htons(inet_sk(sk
)->inet_num
);
421 sp
->pf
->to_sk_saddr(addr
, sk
);
426 /* ADDIP Section 4.1.1 Congestion Control of ASCONF Chunks
428 * R1) One and only one ASCONF Chunk MAY be in transit and unacknowledged
429 * at any one time. If a sender, after sending an ASCONF chunk, decides
430 * it needs to transfer another ASCONF Chunk, it MUST wait until the
431 * ASCONF-ACK Chunk returns from the previous ASCONF Chunk before sending a
432 * subsequent ASCONF. Note this restriction binds each side, so at any
433 * time two ASCONF may be in-transit on any given association (one sent
434 * from each endpoint).
436 static int sctp_send_asconf(struct sctp_association
*asoc
,
437 struct sctp_chunk
*chunk
)
439 struct net
*net
= sock_net(asoc
->base
.sk
);
442 /* If there is an outstanding ASCONF chunk, queue it for later
445 if (asoc
->addip_last_asconf
) {
446 list_add_tail(&chunk
->list
, &asoc
->addip_chunk_list
);
450 /* Hold the chunk until an ASCONF_ACK is received. */
451 sctp_chunk_hold(chunk
);
452 retval
= sctp_primitive_ASCONF(net
, asoc
, chunk
);
454 sctp_chunk_free(chunk
);
456 asoc
->addip_last_asconf
= chunk
;
462 /* Add a list of addresses as bind addresses to local endpoint or
465 * Basically run through each address specified in the addrs/addrcnt
466 * array/length pair, determine if it is IPv6 or IPv4 and call
467 * sctp_do_bind() on it.
469 * If any of them fails, then the operation will be reversed and the
470 * ones that were added will be removed.
472 * Only sctp_setsockopt_bindx() is supposed to call this function.
474 static int sctp_bindx_add(struct sock
*sk
, struct sockaddr
*addrs
, int addrcnt
)
479 struct sockaddr
*sa_addr
;
482 pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", __func__
, sk
,
486 for (cnt
= 0; cnt
< addrcnt
; cnt
++) {
487 /* The list may contain either IPv4 or IPv6 address;
488 * determine the address length for walking thru the list.
491 af
= sctp_get_af_specific(sa_addr
->sa_family
);
497 retval
= sctp_do_bind(sk
, (union sctp_addr
*)sa_addr
,
500 addr_buf
+= af
->sockaddr_len
;
504 /* Failed. Cleanup the ones that have been added */
506 sctp_bindx_rem(sk
, addrs
, cnt
);
514 /* Send an ASCONF chunk with Add IP address parameters to all the peers of the
515 * associations that are part of the endpoint indicating that a list of local
516 * addresses are added to the endpoint.
518 * If any of the addresses is already in the bind address list of the
519 * association, we do not send the chunk for that association. But it will not
520 * affect other associations.
522 * Only sctp_setsockopt_bindx() is supposed to call this function.
524 static int sctp_send_asconf_add_ip(struct sock
*sk
,
525 struct sockaddr
*addrs
,
528 struct sctp_sock
*sp
;
529 struct sctp_endpoint
*ep
;
530 struct sctp_association
*asoc
;
531 struct sctp_bind_addr
*bp
;
532 struct sctp_chunk
*chunk
;
533 struct sctp_sockaddr_entry
*laddr
;
534 union sctp_addr
*addr
;
535 union sctp_addr saveaddr
;
545 if (!ep
->asconf_enable
)
548 pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n",
549 __func__
, sk
, addrs
, addrcnt
);
551 list_for_each_entry(asoc
, &ep
->asocs
, asocs
) {
552 if (!asoc
->peer
.asconf_capable
)
555 if (asoc
->peer
.addip_disabled_mask
& SCTP_PARAM_ADD_IP
)
558 if (!sctp_state(asoc
, ESTABLISHED
))
561 /* Check if any address in the packed array of addresses is
562 * in the bind address list of the association. If so,
563 * do not send the asconf chunk to its peer, but continue with
564 * other associations.
567 for (i
= 0; i
< addrcnt
; i
++) {
569 af
= sctp_get_af_specific(addr
->v4
.sin_family
);
575 if (sctp_assoc_lookup_laddr(asoc
, addr
))
578 addr_buf
+= af
->sockaddr_len
;
583 /* Use the first valid address in bind addr list of
584 * association as Address Parameter of ASCONF CHUNK.
586 bp
= &asoc
->base
.bind_addr
;
587 p
= bp
->address_list
.next
;
588 laddr
= list_entry(p
, struct sctp_sockaddr_entry
, list
);
589 chunk
= sctp_make_asconf_update_ip(asoc
, &laddr
->a
, addrs
,
590 addrcnt
, SCTP_PARAM_ADD_IP
);
596 /* Add the new addresses to the bind address list with
597 * use_as_src set to 0.
600 for (i
= 0; i
< addrcnt
; i
++) {
602 af
= sctp_get_af_specific(addr
->v4
.sin_family
);
603 memcpy(&saveaddr
, addr
, af
->sockaddr_len
);
604 retval
= sctp_add_bind_addr(bp
, &saveaddr
,
606 SCTP_ADDR_NEW
, GFP_ATOMIC
);
607 addr_buf
+= af
->sockaddr_len
;
609 if (asoc
->src_out_of_asoc_ok
) {
610 struct sctp_transport
*trans
;
612 list_for_each_entry(trans
,
613 &asoc
->peer
.transport_addr_list
, transports
) {
614 trans
->cwnd
= min(4*asoc
->pathmtu
, max_t(__u32
,
615 2*asoc
->pathmtu
, 4380));
616 trans
->ssthresh
= asoc
->peer
.i
.a_rwnd
;
617 trans
->rto
= asoc
->rto_initial
;
618 sctp_max_rto(asoc
, trans
);
619 trans
->rtt
= trans
->srtt
= trans
->rttvar
= 0;
620 /* Clear the source and route cache */
621 sctp_transport_route(trans
, NULL
,
622 sctp_sk(asoc
->base
.sk
));
625 retval
= sctp_send_asconf(asoc
, chunk
);
632 /* Remove a list of addresses from bind addresses list. Do not remove the
635 * Basically run through each address specified in the addrs/addrcnt
636 * array/length pair, determine if it is IPv6 or IPv4 and call
637 * sctp_del_bind() on it.
639 * If any of them fails, then the operation will be reversed and the
640 * ones that were removed will be added back.
642 * At least one address has to be left; if only one address is
643 * available, the operation will return -EBUSY.
645 * Only sctp_setsockopt_bindx() is supposed to call this function.
647 static int sctp_bindx_rem(struct sock
*sk
, struct sockaddr
*addrs
, int addrcnt
)
649 struct sctp_sock
*sp
= sctp_sk(sk
);
650 struct sctp_endpoint
*ep
= sp
->ep
;
652 struct sctp_bind_addr
*bp
= &ep
->base
.bind_addr
;
655 union sctp_addr
*sa_addr
;
658 pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n",
659 __func__
, sk
, addrs
, addrcnt
);
662 for (cnt
= 0; cnt
< addrcnt
; cnt
++) {
663 /* If the bind address list is empty or if there is only one
664 * bind address, there is nothing more to be removed (we need
665 * at least one address here).
667 if (list_empty(&bp
->address_list
) ||
668 (sctp_list_single_entry(&bp
->address_list
))) {
674 af
= sctp_get_af_specific(sa_addr
->sa
.sa_family
);
680 if (!af
->addr_valid(sa_addr
, sp
, NULL
)) {
681 retval
= -EADDRNOTAVAIL
;
685 if (sa_addr
->v4
.sin_port
&&
686 sa_addr
->v4
.sin_port
!= htons(bp
->port
)) {
691 if (!sa_addr
->v4
.sin_port
)
692 sa_addr
->v4
.sin_port
= htons(bp
->port
);
694 /* FIXME - There is probably a need to check if sk->sk_saddr and
695 * sk->sk_rcv_addr are currently set to one of the addresses to
696 * be removed. This is something which needs to be looked into
697 * when we are fixing the outstanding issues with multi-homing
698 * socket routing and failover schemes. Refer to comments in
699 * sctp_do_bind(). -daisy
701 retval
= sctp_del_bind_addr(bp
, sa_addr
);
703 addr_buf
+= af
->sockaddr_len
;
706 /* Failed. Add the ones that has been removed back */
708 sctp_bindx_add(sk
, addrs
, cnt
);
716 /* Send an ASCONF chunk with Delete IP address parameters to all the peers of
717 * the associations that are part of the endpoint indicating that a list of
718 * local addresses are removed from the endpoint.
720 * If any of the addresses is already in the bind address list of the
721 * association, we do not send the chunk for that association. But it will not
722 * affect other associations.
724 * Only sctp_setsockopt_bindx() is supposed to call this function.
726 static int sctp_send_asconf_del_ip(struct sock
*sk
,
727 struct sockaddr
*addrs
,
730 struct sctp_sock
*sp
;
731 struct sctp_endpoint
*ep
;
732 struct sctp_association
*asoc
;
733 struct sctp_transport
*transport
;
734 struct sctp_bind_addr
*bp
;
735 struct sctp_chunk
*chunk
;
736 union sctp_addr
*laddr
;
739 struct sctp_sockaddr_entry
*saddr
;
748 if (!ep
->asconf_enable
)
751 pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n",
752 __func__
, sk
, addrs
, addrcnt
);
754 list_for_each_entry(asoc
, &ep
->asocs
, asocs
) {
756 if (!asoc
->peer
.asconf_capable
)
759 if (asoc
->peer
.addip_disabled_mask
& SCTP_PARAM_DEL_IP
)
762 if (!sctp_state(asoc
, ESTABLISHED
))
765 /* Check if any address in the packed array of addresses is
766 * not present in the bind address list of the association.
767 * If so, do not send the asconf chunk to its peer, but
768 * continue with other associations.
771 for (i
= 0; i
< addrcnt
; i
++) {
773 af
= sctp_get_af_specific(laddr
->v4
.sin_family
);
779 if (!sctp_assoc_lookup_laddr(asoc
, laddr
))
782 addr_buf
+= af
->sockaddr_len
;
787 /* Find one address in the association's bind address list
788 * that is not in the packed array of addresses. This is to
789 * make sure that we do not delete all the addresses in the
792 bp
= &asoc
->base
.bind_addr
;
793 laddr
= sctp_find_unmatch_addr(bp
, (union sctp_addr
*)addrs
,
795 if ((laddr
== NULL
) && (addrcnt
== 1)) {
796 if (asoc
->asconf_addr_del_pending
)
798 asoc
->asconf_addr_del_pending
=
799 kzalloc(sizeof(union sctp_addr
), GFP_ATOMIC
);
800 if (asoc
->asconf_addr_del_pending
== NULL
) {
804 asoc
->asconf_addr_del_pending
->sa
.sa_family
=
806 asoc
->asconf_addr_del_pending
->v4
.sin_port
=
808 if (addrs
->sa_family
== AF_INET
) {
809 struct sockaddr_in
*sin
;
811 sin
= (struct sockaddr_in
*)addrs
;
812 asoc
->asconf_addr_del_pending
->v4
.sin_addr
.s_addr
= sin
->sin_addr
.s_addr
;
813 } else if (addrs
->sa_family
== AF_INET6
) {
814 struct sockaddr_in6
*sin6
;
816 sin6
= (struct sockaddr_in6
*)addrs
;
817 asoc
->asconf_addr_del_pending
->v6
.sin6_addr
= sin6
->sin6_addr
;
820 pr_debug("%s: keep the last address asoc:%p %pISc at %p\n",
821 __func__
, asoc
, &asoc
->asconf_addr_del_pending
->sa
,
822 asoc
->asconf_addr_del_pending
);
824 asoc
->src_out_of_asoc_ok
= 1;
832 /* We do not need RCU protection throughout this loop
833 * because this is done under a socket lock from the
836 chunk
= sctp_make_asconf_update_ip(asoc
, laddr
, addrs
, addrcnt
,
844 /* Reset use_as_src flag for the addresses in the bind address
845 * list that are to be deleted.
848 for (i
= 0; i
< addrcnt
; i
++) {
850 af
= sctp_get_af_specific(laddr
->v4
.sin_family
);
851 list_for_each_entry(saddr
, &bp
->address_list
, list
) {
852 if (sctp_cmp_addr_exact(&saddr
->a
, laddr
))
853 saddr
->state
= SCTP_ADDR_DEL
;
855 addr_buf
+= af
->sockaddr_len
;
858 /* Update the route and saddr entries for all the transports
859 * as some of the addresses in the bind address list are
860 * about to be deleted and cannot be used as source addresses.
862 list_for_each_entry(transport
, &asoc
->peer
.transport_addr_list
,
864 sctp_transport_route(transport
, NULL
,
865 sctp_sk(asoc
->base
.sk
));
869 /* We don't need to transmit ASCONF */
871 retval
= sctp_send_asconf(asoc
, chunk
);
877 /* set addr events to assocs in the endpoint. ep and addr_wq must be locked */
878 int sctp_asconf_mgmt(struct sctp_sock
*sp
, struct sctp_sockaddr_entry
*addrw
)
880 struct sock
*sk
= sctp_opt2sk(sp
);
881 union sctp_addr
*addr
;
884 /* It is safe to write port space in caller. */
886 addr
->v4
.sin_port
= htons(sp
->ep
->base
.bind_addr
.port
);
887 af
= sctp_get_af_specific(addr
->sa
.sa_family
);
890 if (sctp_verify_addr(sk
, addr
, af
->sockaddr_len
))
893 if (addrw
->state
== SCTP_ADDR_NEW
)
894 return sctp_send_asconf_add_ip(sk
, (struct sockaddr
*)addr
, 1);
896 return sctp_send_asconf_del_ip(sk
, (struct sockaddr
*)addr
, 1);
899 /* Helper for tunneling sctp_bindx() requests through sctp_setsockopt()
902 * int sctp_bindx(int sd, struct sockaddr *addrs, int addrcnt,
905 * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses.
906 * If the sd is an IPv6 socket, the addresses passed can either be IPv4
909 * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see
910 * Section 3.1.2 for this usage.
912 * addrs is a pointer to an array of one or more socket addresses. Each
913 * address is contained in its appropriate structure (i.e. struct
914 * sockaddr_in or struct sockaddr_in6) the family of the address type
915 * must be used to distinguish the address length (note that this
916 * representation is termed a "packed array" of addresses). The caller
917 * specifies the number of addresses in the array with addrcnt.
919 * On success, sctp_bindx() returns 0. On failure, sctp_bindx() returns
920 * -1, and sets errno to the appropriate error code.
922 * For SCTP, the port given in each socket address must be the same, or
923 * sctp_bindx() will fail, setting errno to EINVAL.
925 * The flags parameter is formed from the bitwise OR of zero or more of
926 * the following currently defined flags:
928 * SCTP_BINDX_ADD_ADDR
930 * SCTP_BINDX_REM_ADDR
932 * SCTP_BINDX_ADD_ADDR directs SCTP to add the given addresses to the
933 * association, and SCTP_BINDX_REM_ADDR directs SCTP to remove the given
934 * addresses from the association. The two flags are mutually exclusive;
935 * if both are given, sctp_bindx() will fail with EINVAL. A caller may
936 * not remove all addresses from an association; sctp_bindx() will
937 * reject such an attempt with EINVAL.
939 * An application can use sctp_bindx(SCTP_BINDX_ADD_ADDR) to associate
940 * additional addresses with an endpoint after calling bind(). Or use
941 * sctp_bindx(SCTP_BINDX_REM_ADDR) to remove some addresses a listening
942 * socket is associated with so that no new association accepted will be
943 * associated with those addresses. If the endpoint supports dynamic
944 * address a SCTP_BINDX_REM_ADDR or SCTP_BINDX_ADD_ADDR may cause a
945 * endpoint to send the appropriate message to the peer to change the
946 * peers address lists.
948 * Adding and removing addresses from a connected association is
949 * optional functionality. Implementations that do not support this
950 * functionality should return EOPNOTSUPP.
952 * Basically do nothing but copying the addresses from user to kernel
953 * land and invoking either sctp_bindx_add() or sctp_bindx_rem() on the sk.
954 * This is used for tunneling the sctp_bindx() request through sctp_setsockopt()
957 * On exit there is no need to do sockfd_put(), sys_setsockopt() does
960 * sk The sk of the socket
961 * addrs The pointer to the addresses in user land
962 * addrssize Size of the addrs buffer
963 * op Operation to perform (add or remove, see the flags of
966 * Returns 0 if ok, <0 errno code on error.
968 static int sctp_setsockopt_bindx(struct sock
*sk
,
969 struct sockaddr __user
*addrs
,
970 int addrs_size
, int op
)
972 struct sockaddr
*kaddrs
;
976 struct sockaddr
*sa_addr
;
980 pr_debug("%s: sk:%p addrs:%p addrs_size:%d opt:%d\n",
981 __func__
, sk
, addrs
, addrs_size
, op
);
983 if (unlikely(addrs_size
<= 0))
986 kaddrs
= memdup_user(addrs
, addrs_size
);
988 return PTR_ERR(kaddrs
);
990 /* Walk through the addrs buffer and count the number of addresses. */
992 while (walk_size
< addrs_size
) {
993 if (walk_size
+ sizeof(sa_family_t
) > addrs_size
) {
999 af
= sctp_get_af_specific(sa_addr
->sa_family
);
1001 /* If the address family is not supported or if this address
1002 * causes the address buffer to overflow return EINVAL.
1004 if (!af
|| (walk_size
+ af
->sockaddr_len
) > addrs_size
) {
1009 addr_buf
+= af
->sockaddr_len
;
1010 walk_size
+= af
->sockaddr_len
;
1015 case SCTP_BINDX_ADD_ADDR
:
1016 /* Allow security module to validate bindx addresses. */
1017 err
= security_sctp_bind_connect(sk
, SCTP_SOCKOPT_BINDX_ADD
,
1018 (struct sockaddr
*)kaddrs
,
1022 err
= sctp_bindx_add(sk
, kaddrs
, addrcnt
);
1025 err
= sctp_send_asconf_add_ip(sk
, kaddrs
, addrcnt
);
1028 case SCTP_BINDX_REM_ADDR
:
1029 err
= sctp_bindx_rem(sk
, kaddrs
, addrcnt
);
1032 err
= sctp_send_asconf_del_ip(sk
, kaddrs
, addrcnt
);
1046 static int sctp_connect_new_asoc(struct sctp_endpoint
*ep
,
1047 const union sctp_addr
*daddr
,
1048 const struct sctp_initmsg
*init
,
1049 struct sctp_transport
**tp
)
1051 struct sctp_association
*asoc
;
1052 struct sock
*sk
= ep
->base
.sk
;
1053 struct net
*net
= sock_net(sk
);
1054 enum sctp_scope scope
;
1057 if (sctp_endpoint_is_peeled_off(ep
, daddr
))
1058 return -EADDRNOTAVAIL
;
1060 if (!ep
->base
.bind_addr
.port
) {
1061 if (sctp_autobind(sk
))
1064 if (ep
->base
.bind_addr
.port
< inet_prot_sock(net
) &&
1065 !ns_capable(net
->user_ns
, CAP_NET_BIND_SERVICE
))
1069 scope
= sctp_scope(daddr
);
1070 asoc
= sctp_association_new(ep
, sk
, scope
, GFP_KERNEL
);
1074 err
= sctp_assoc_set_bind_addr_from_ep(asoc
, scope
, GFP_KERNEL
);
1078 *tp
= sctp_assoc_add_peer(asoc
, daddr
, GFP_KERNEL
, SCTP_UNKNOWN
);
1087 if (init
->sinit_num_ostreams
) {
1088 __u16 outcnt
= init
->sinit_num_ostreams
;
1090 asoc
->c
.sinit_num_ostreams
= outcnt
;
1091 /* outcnt has been changed, need to re-init stream */
1092 err
= sctp_stream_init(&asoc
->stream
, outcnt
, 0, GFP_KERNEL
);
1097 if (init
->sinit_max_instreams
)
1098 asoc
->c
.sinit_max_instreams
= init
->sinit_max_instreams
;
1100 if (init
->sinit_max_attempts
)
1101 asoc
->max_init_attempts
= init
->sinit_max_attempts
;
1103 if (init
->sinit_max_init_timeo
)
1104 asoc
->max_init_timeo
=
1105 msecs_to_jiffies(init
->sinit_max_init_timeo
);
1109 sctp_association_free(asoc
);
1113 static int sctp_connect_add_peer(struct sctp_association
*asoc
,
1114 union sctp_addr
*daddr
, int addr_len
)
1116 struct sctp_endpoint
*ep
= asoc
->ep
;
1117 struct sctp_association
*old
;
1118 struct sctp_transport
*t
;
1121 err
= sctp_verify_addr(ep
->base
.sk
, daddr
, addr_len
);
1125 old
= sctp_endpoint_lookup_assoc(ep
, daddr
, &t
);
1126 if (old
&& old
!= asoc
)
1127 return old
->state
>= SCTP_STATE_ESTABLISHED
? -EISCONN
1130 if (sctp_endpoint_is_peeled_off(ep
, daddr
))
1131 return -EADDRNOTAVAIL
;
1133 t
= sctp_assoc_add_peer(asoc
, daddr
, GFP_KERNEL
, SCTP_UNKNOWN
);
1140 /* __sctp_connect(struct sock* sk, struct sockaddr *kaddrs, int addrs_size)
1142 * Common routine for handling connect() and sctp_connectx().
1143 * Connect will come in with just a single address.
1145 static int __sctp_connect(struct sock
*sk
, struct sockaddr
*kaddrs
,
1146 int addrs_size
, int flags
, sctp_assoc_t
*assoc_id
)
1148 struct sctp_sock
*sp
= sctp_sk(sk
);
1149 struct sctp_endpoint
*ep
= sp
->ep
;
1150 struct sctp_transport
*transport
;
1151 struct sctp_association
*asoc
;
1152 void *addr_buf
= kaddrs
;
1153 union sctp_addr
*daddr
;
1158 if (sctp_sstate(sk
, ESTABLISHED
) || sctp_sstate(sk
, CLOSING
) ||
1159 (sctp_style(sk
, TCP
) && sctp_sstate(sk
, LISTENING
)))
1163 af
= sctp_get_af_specific(daddr
->sa
.sa_family
);
1164 if (!af
|| af
->sockaddr_len
> addrs_size
)
1167 err
= sctp_verify_addr(sk
, daddr
, af
->sockaddr_len
);
1171 asoc
= sctp_endpoint_lookup_assoc(ep
, daddr
, &transport
);
1173 return asoc
->state
>= SCTP_STATE_ESTABLISHED
? -EISCONN
1176 err
= sctp_connect_new_asoc(ep
, daddr
, NULL
, &transport
);
1179 asoc
= transport
->asoc
;
1181 addr_buf
+= af
->sockaddr_len
;
1182 walk_size
= af
->sockaddr_len
;
1183 while (walk_size
< addrs_size
) {
1185 if (walk_size
+ sizeof(sa_family_t
) > addrs_size
)
1189 af
= sctp_get_af_specific(daddr
->sa
.sa_family
);
1190 if (!af
|| af
->sockaddr_len
+ walk_size
> addrs_size
)
1193 if (asoc
->peer
.port
!= ntohs(daddr
->v4
.sin_port
))
1196 err
= sctp_connect_add_peer(asoc
, daddr
, af
->sockaddr_len
);
1200 addr_buf
+= af
->sockaddr_len
;
1201 walk_size
+= af
->sockaddr_len
;
1204 /* In case the user of sctp_connectx() wants an association
1205 * id back, assign one now.
1208 err
= sctp_assoc_set_id(asoc
, GFP_KERNEL
);
1213 err
= sctp_primitive_ASSOCIATE(sock_net(sk
), asoc
, NULL
);
1217 /* Initialize sk's dport and daddr for getpeername() */
1218 inet_sk(sk
)->inet_dport
= htons(asoc
->peer
.port
);
1219 sp
->pf
->to_sk_daddr(daddr
, sk
);
1223 *assoc_id
= asoc
->assoc_id
;
1225 timeo
= sock_sndtimeo(sk
, flags
& O_NONBLOCK
);
1226 return sctp_wait_for_connect(asoc
, &timeo
);
1229 pr_debug("%s: took out_free path with asoc:%p kaddrs:%p err:%d\n",
1230 __func__
, asoc
, kaddrs
, err
);
1231 sctp_association_free(asoc
);
1235 /* Helper for tunneling sctp_connectx() requests through sctp_setsockopt()
1238 * int sctp_connectx(int sd, struct sockaddr *addrs, int addrcnt,
1239 * sctp_assoc_t *asoc);
1241 * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses.
1242 * If the sd is an IPv6 socket, the addresses passed can either be IPv4
1243 * or IPv6 addresses.
1245 * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see
1246 * Section 3.1.2 for this usage.
1248 * addrs is a pointer to an array of one or more socket addresses. Each
1249 * address is contained in its appropriate structure (i.e. struct
1250 * sockaddr_in or struct sockaddr_in6) the family of the address type
1251 * must be used to distengish the address length (note that this
1252 * representation is termed a "packed array" of addresses). The caller
1253 * specifies the number of addresses in the array with addrcnt.
1255 * On success, sctp_connectx() returns 0. It also sets the assoc_id to
1256 * the association id of the new association. On failure, sctp_connectx()
1257 * returns -1, and sets errno to the appropriate error code. The assoc_id
1258 * is not touched by the kernel.
1260 * For SCTP, the port given in each socket address must be the same, or
1261 * sctp_connectx() will fail, setting errno to EINVAL.
1263 * An application can use sctp_connectx to initiate an association with
1264 * an endpoint that is multi-homed. Much like sctp_bindx() this call
1265 * allows a caller to specify multiple addresses at which a peer can be
1266 * reached. The way the SCTP stack uses the list of addresses to set up
1267 * the association is implementation dependent. This function only
1268 * specifies that the stack will try to make use of all the addresses in
1269 * the list when needed.
1271 * Note that the list of addresses passed in is only used for setting up
1272 * the association. It does not necessarily equal the set of addresses
1273 * the peer uses for the resulting association. If the caller wants to
1274 * find out the set of peer addresses, it must use sctp_getpaddrs() to
1275 * retrieve them after the association has been set up.
1277 * Basically do nothing but copying the addresses from user to kernel
1278 * land and invoking either sctp_connectx(). This is used for tunneling
1279 * the sctp_connectx() request through sctp_setsockopt() from userspace.
1281 * On exit there is no need to do sockfd_put(), sys_setsockopt() does
1284 * sk The sk of the socket
1285 * addrs The pointer to the addresses in user land
1286 * addrssize Size of the addrs buffer
1288 * Returns >=0 if ok, <0 errno code on error.
1290 static int __sctp_setsockopt_connectx(struct sock
*sk
,
1291 struct sockaddr __user
*addrs
,
1293 sctp_assoc_t
*assoc_id
)
1295 struct sockaddr
*kaddrs
;
1296 int err
= 0, flags
= 0;
1298 pr_debug("%s: sk:%p addrs:%p addrs_size:%d\n",
1299 __func__
, sk
, addrs
, addrs_size
);
1301 /* make sure the 1st addr's sa_family is accessible later */
1302 if (unlikely(addrs_size
< sizeof(sa_family_t
)))
1305 kaddrs
= memdup_user(addrs
, addrs_size
);
1307 return PTR_ERR(kaddrs
);
1309 /* Allow security module to validate connectx addresses. */
1310 err
= security_sctp_bind_connect(sk
, SCTP_SOCKOPT_CONNECTX
,
1311 (struct sockaddr
*)kaddrs
,
1316 /* in-kernel sockets don't generally have a file allocated to them
1317 * if all they do is call sock_create_kern().
1319 if (sk
->sk_socket
->file
)
1320 flags
= sk
->sk_socket
->file
->f_flags
;
1322 err
= __sctp_connect(sk
, kaddrs
, addrs_size
, flags
, assoc_id
);
1331 * This is an older interface. It's kept for backward compatibility
1332 * to the option that doesn't provide association id.
1334 static int sctp_setsockopt_connectx_old(struct sock
*sk
,
1335 struct sockaddr __user
*addrs
,
1338 return __sctp_setsockopt_connectx(sk
, addrs
, addrs_size
, NULL
);
1342 * New interface for the API. The since the API is done with a socket
1343 * option, to make it simple we feed back the association id is as a return
1344 * indication to the call. Error is always negative and association id is
1347 static int sctp_setsockopt_connectx(struct sock
*sk
,
1348 struct sockaddr __user
*addrs
,
1351 sctp_assoc_t assoc_id
= 0;
1354 err
= __sctp_setsockopt_connectx(sk
, addrs
, addrs_size
, &assoc_id
);
1363 * New (hopefully final) interface for the API.
1364 * We use the sctp_getaddrs_old structure so that use-space library
1365 * can avoid any unnecessary allocations. The only different part
1366 * is that we store the actual length of the address buffer into the
1367 * addrs_num structure member. That way we can re-use the existing
1370 #ifdef CONFIG_COMPAT
1371 struct compat_sctp_getaddrs_old
{
1372 sctp_assoc_t assoc_id
;
1374 compat_uptr_t addrs
; /* struct sockaddr * */
1378 static int sctp_getsockopt_connectx3(struct sock
*sk
, int len
,
1379 char __user
*optval
,
1382 struct sctp_getaddrs_old param
;
1383 sctp_assoc_t assoc_id
= 0;
1386 #ifdef CONFIG_COMPAT
1387 if (in_compat_syscall()) {
1388 struct compat_sctp_getaddrs_old param32
;
1390 if (len
< sizeof(param32
))
1392 if (copy_from_user(¶m32
, optval
, sizeof(param32
)))
1395 param
.assoc_id
= param32
.assoc_id
;
1396 param
.addr_num
= param32
.addr_num
;
1397 param
.addrs
= compat_ptr(param32
.addrs
);
1401 if (len
< sizeof(param
))
1403 if (copy_from_user(¶m
, optval
, sizeof(param
)))
1407 err
= __sctp_setsockopt_connectx(sk
, (struct sockaddr __user
*)
1408 param
.addrs
, param
.addr_num
,
1410 if (err
== 0 || err
== -EINPROGRESS
) {
1411 if (copy_to_user(optval
, &assoc_id
, sizeof(assoc_id
)))
1413 if (put_user(sizeof(assoc_id
), optlen
))
1420 /* API 3.1.4 close() - UDP Style Syntax
1421 * Applications use close() to perform graceful shutdown (as described in
1422 * Section 10.1 of [SCTP]) on ALL the associations currently represented
1423 * by a UDP-style socket.
1427 * ret = close(int sd);
1429 * sd - the socket descriptor of the associations to be closed.
1431 * To gracefully shutdown a specific association represented by the
1432 * UDP-style socket, an application should use the sendmsg() call,
1433 * passing no user data, but including the appropriate flag in the
1434 * ancillary data (see Section xxxx).
1436 * If sd in the close() call is a branched-off socket representing only
1437 * one association, the shutdown is performed on that association only.
1439 * 4.1.6 close() - TCP Style Syntax
1441 * Applications use close() to gracefully close down an association.
1445 * int close(int sd);
1447 * sd - the socket descriptor of the association to be closed.
1449 * After an application calls close() on a socket descriptor, no further
1450 * socket operations will succeed on that descriptor.
1452 * API 7.1.4 SO_LINGER
1454 * An application using the TCP-style socket can use this option to
1455 * perform the SCTP ABORT primitive. The linger option structure is:
1458 * int l_onoff; // option on/off
1459 * int l_linger; // linger time
1462 * To enable the option, set l_onoff to 1. If the l_linger value is set
1463 * to 0, calling close() is the same as the ABORT primitive. If the
1464 * value is set to a negative value, the setsockopt() call will return
1465 * an error. If the value is set to a positive value linger_time, the
1466 * close() can be blocked for at most linger_time ms. If the graceful
1467 * shutdown phase does not finish during this period, close() will
1468 * return but the graceful shutdown phase continues in the system.
1470 static void sctp_close(struct sock
*sk
, long timeout
)
1472 struct net
*net
= sock_net(sk
);
1473 struct sctp_endpoint
*ep
;
1474 struct sctp_association
*asoc
;
1475 struct list_head
*pos
, *temp
;
1476 unsigned int data_was_unread
;
1478 pr_debug("%s: sk:%p, timeout:%ld\n", __func__
, sk
, timeout
);
1480 lock_sock_nested(sk
, SINGLE_DEPTH_NESTING
);
1481 sk
->sk_shutdown
= SHUTDOWN_MASK
;
1482 inet_sk_set_state(sk
, SCTP_SS_CLOSING
);
1484 ep
= sctp_sk(sk
)->ep
;
1486 /* Clean up any skbs sitting on the receive queue. */
1487 data_was_unread
= sctp_queue_purge_ulpevents(&sk
->sk_receive_queue
);
1488 data_was_unread
+= sctp_queue_purge_ulpevents(&sctp_sk(sk
)->pd_lobby
);
1490 /* Walk all associations on an endpoint. */
1491 list_for_each_safe(pos
, temp
, &ep
->asocs
) {
1492 asoc
= list_entry(pos
, struct sctp_association
, asocs
);
1494 if (sctp_style(sk
, TCP
)) {
1495 /* A closed association can still be in the list if
1496 * it belongs to a TCP-style listening socket that is
1497 * not yet accepted. If so, free it. If not, send an
1498 * ABORT or SHUTDOWN based on the linger options.
1500 if (sctp_state(asoc
, CLOSED
)) {
1501 sctp_association_free(asoc
);
1506 if (data_was_unread
|| !skb_queue_empty(&asoc
->ulpq
.lobby
) ||
1507 !skb_queue_empty(&asoc
->ulpq
.reasm
) ||
1508 !skb_queue_empty(&asoc
->ulpq
.reasm_uo
) ||
1509 (sock_flag(sk
, SOCK_LINGER
) && !sk
->sk_lingertime
)) {
1510 struct sctp_chunk
*chunk
;
1512 chunk
= sctp_make_abort_user(asoc
, NULL
, 0);
1513 sctp_primitive_ABORT(net
, asoc
, chunk
);
1515 sctp_primitive_SHUTDOWN(net
, asoc
, NULL
);
1518 /* On a TCP-style socket, block for at most linger_time if set. */
1519 if (sctp_style(sk
, TCP
) && timeout
)
1520 sctp_wait_for_close(sk
, timeout
);
1522 /* This will run the backlog queue. */
1525 /* Supposedly, no process has access to the socket, but
1526 * the net layers still may.
1527 * Also, sctp_destroy_sock() needs to be called with addr_wq_lock
1528 * held and that should be grabbed before socket lock.
1530 spin_lock_bh(&net
->sctp
.addr_wq_lock
);
1531 bh_lock_sock_nested(sk
);
1533 /* Hold the sock, since sk_common_release() will put sock_put()
1534 * and we have just a little more cleanup.
1537 sk_common_release(sk
);
1540 spin_unlock_bh(&net
->sctp
.addr_wq_lock
);
1544 SCTP_DBG_OBJCNT_DEC(sock
);
1547 /* Handle EPIPE error. */
1548 static int sctp_error(struct sock
*sk
, int flags
, int err
)
1551 err
= sock_error(sk
) ? : -EPIPE
;
1552 if (err
== -EPIPE
&& !(flags
& MSG_NOSIGNAL
))
1553 send_sig(SIGPIPE
, current
, 0);
1557 /* API 3.1.3 sendmsg() - UDP Style Syntax
1559 * An application uses sendmsg() and recvmsg() calls to transmit data to
1560 * and receive data from its peer.
1562 * ssize_t sendmsg(int socket, const struct msghdr *message,
1565 * socket - the socket descriptor of the endpoint.
1566 * message - pointer to the msghdr structure which contains a single
1567 * user message and possibly some ancillary data.
1569 * See Section 5 for complete description of the data
1572 * flags - flags sent or received with the user message, see Section
1573 * 5 for complete description of the flags.
1575 * Note: This function could use a rewrite especially when explicit
1576 * connect support comes in.
1578 /* BUG: We do not implement the equivalent of sk_stream_wait_memory(). */
1580 static int sctp_msghdr_parse(const struct msghdr
*msg
,
1581 struct sctp_cmsgs
*cmsgs
);
1583 static int sctp_sendmsg_parse(struct sock
*sk
, struct sctp_cmsgs
*cmsgs
,
1584 struct sctp_sndrcvinfo
*srinfo
,
1585 const struct msghdr
*msg
, size_t msg_len
)
1590 if (sctp_sstate(sk
, LISTENING
) && sctp_style(sk
, TCP
))
1593 if (msg_len
> sk
->sk_sndbuf
)
1596 memset(cmsgs
, 0, sizeof(*cmsgs
));
1597 err
= sctp_msghdr_parse(msg
, cmsgs
);
1599 pr_debug("%s: msghdr parse err:%x\n", __func__
, err
);
1603 memset(srinfo
, 0, sizeof(*srinfo
));
1604 if (cmsgs
->srinfo
) {
1605 srinfo
->sinfo_stream
= cmsgs
->srinfo
->sinfo_stream
;
1606 srinfo
->sinfo_flags
= cmsgs
->srinfo
->sinfo_flags
;
1607 srinfo
->sinfo_ppid
= cmsgs
->srinfo
->sinfo_ppid
;
1608 srinfo
->sinfo_context
= cmsgs
->srinfo
->sinfo_context
;
1609 srinfo
->sinfo_assoc_id
= cmsgs
->srinfo
->sinfo_assoc_id
;
1610 srinfo
->sinfo_timetolive
= cmsgs
->srinfo
->sinfo_timetolive
;
1614 srinfo
->sinfo_stream
= cmsgs
->sinfo
->snd_sid
;
1615 srinfo
->sinfo_flags
= cmsgs
->sinfo
->snd_flags
;
1616 srinfo
->sinfo_ppid
= cmsgs
->sinfo
->snd_ppid
;
1617 srinfo
->sinfo_context
= cmsgs
->sinfo
->snd_context
;
1618 srinfo
->sinfo_assoc_id
= cmsgs
->sinfo
->snd_assoc_id
;
1621 if (cmsgs
->prinfo
) {
1622 srinfo
->sinfo_timetolive
= cmsgs
->prinfo
->pr_value
;
1623 SCTP_PR_SET_POLICY(srinfo
->sinfo_flags
,
1624 cmsgs
->prinfo
->pr_policy
);
1627 sflags
= srinfo
->sinfo_flags
;
1628 if (!sflags
&& msg_len
)
1631 if (sctp_style(sk
, TCP
) && (sflags
& (SCTP_EOF
| SCTP_ABORT
)))
1634 if (((sflags
& SCTP_EOF
) && msg_len
> 0) ||
1635 (!(sflags
& (SCTP_EOF
| SCTP_ABORT
)) && msg_len
== 0))
1638 if ((sflags
& SCTP_ADDR_OVER
) && !msg
->msg_name
)
1644 static int sctp_sendmsg_new_asoc(struct sock
*sk
, __u16 sflags
,
1645 struct sctp_cmsgs
*cmsgs
,
1646 union sctp_addr
*daddr
,
1647 struct sctp_transport
**tp
)
1649 struct sctp_endpoint
*ep
= sctp_sk(sk
)->ep
;
1650 struct sctp_association
*asoc
;
1651 struct cmsghdr
*cmsg
;
1652 __be32 flowinfo
= 0;
1658 if (sflags
& (SCTP_EOF
| SCTP_ABORT
))
1661 if (sctp_style(sk
, TCP
) && (sctp_sstate(sk
, ESTABLISHED
) ||
1662 sctp_sstate(sk
, CLOSING
)))
1663 return -EADDRNOTAVAIL
;
1665 /* Label connection socket for first association 1-to-many
1666 * style for client sequence socket()->sendmsg(). This
1667 * needs to be done before sctp_assoc_add_peer() as that will
1668 * set up the initial packet that needs to account for any
1669 * security ip options (CIPSO/CALIPSO) added to the packet.
1671 af
= sctp_get_af_specific(daddr
->sa
.sa_family
);
1674 err
= security_sctp_bind_connect(sk
, SCTP_SENDMSG_CONNECT
,
1675 (struct sockaddr
*)daddr
,
1680 err
= sctp_connect_new_asoc(ep
, daddr
, cmsgs
->init
, tp
);
1685 if (!cmsgs
->addrs_msg
)
1688 if (daddr
->sa
.sa_family
== AF_INET6
)
1689 flowinfo
= daddr
->v6
.sin6_flowinfo
;
1691 /* sendv addr list parse */
1692 for_each_cmsghdr(cmsg
, cmsgs
->addrs_msg
) {
1693 union sctp_addr _daddr
;
1696 if (cmsg
->cmsg_level
!= IPPROTO_SCTP
||
1697 (cmsg
->cmsg_type
!= SCTP_DSTADDRV4
&&
1698 cmsg
->cmsg_type
!= SCTP_DSTADDRV6
))
1702 memset(daddr
, 0, sizeof(*daddr
));
1703 dlen
= cmsg
->cmsg_len
- sizeof(struct cmsghdr
);
1704 if (cmsg
->cmsg_type
== SCTP_DSTADDRV4
) {
1705 if (dlen
< sizeof(struct in_addr
)) {
1710 dlen
= sizeof(struct in_addr
);
1711 daddr
->v4
.sin_family
= AF_INET
;
1712 daddr
->v4
.sin_port
= htons(asoc
->peer
.port
);
1713 memcpy(&daddr
->v4
.sin_addr
, CMSG_DATA(cmsg
), dlen
);
1715 if (dlen
< sizeof(struct in6_addr
)) {
1720 dlen
= sizeof(struct in6_addr
);
1721 daddr
->v6
.sin6_flowinfo
= flowinfo
;
1722 daddr
->v6
.sin6_family
= AF_INET6
;
1723 daddr
->v6
.sin6_port
= htons(asoc
->peer
.port
);
1724 memcpy(&daddr
->v6
.sin6_addr
, CMSG_DATA(cmsg
), dlen
);
1727 err
= sctp_connect_add_peer(asoc
, daddr
, sizeof(*daddr
));
1735 sctp_association_free(asoc
);
1739 static int sctp_sendmsg_check_sflags(struct sctp_association
*asoc
,
1740 __u16 sflags
, struct msghdr
*msg
,
1743 struct sock
*sk
= asoc
->base
.sk
;
1744 struct net
*net
= sock_net(sk
);
1746 if (sctp_state(asoc
, CLOSED
) && sctp_style(sk
, TCP
))
1749 if ((sflags
& SCTP_SENDALL
) && sctp_style(sk
, UDP
) &&
1750 !sctp_state(asoc
, ESTABLISHED
))
1753 if (sflags
& SCTP_EOF
) {
1754 pr_debug("%s: shutting down association:%p\n", __func__
, asoc
);
1755 sctp_primitive_SHUTDOWN(net
, asoc
, NULL
);
1760 if (sflags
& SCTP_ABORT
) {
1761 struct sctp_chunk
*chunk
;
1763 chunk
= sctp_make_abort_user(asoc
, msg
, msg_len
);
1767 pr_debug("%s: aborting association:%p\n", __func__
, asoc
);
1768 sctp_primitive_ABORT(net
, asoc
, chunk
);
1769 iov_iter_revert(&msg
->msg_iter
, msg_len
);
1777 static int sctp_sendmsg_to_asoc(struct sctp_association
*asoc
,
1778 struct msghdr
*msg
, size_t msg_len
,
1779 struct sctp_transport
*transport
,
1780 struct sctp_sndrcvinfo
*sinfo
)
1782 struct sock
*sk
= asoc
->base
.sk
;
1783 struct sctp_sock
*sp
= sctp_sk(sk
);
1784 struct net
*net
= sock_net(sk
);
1785 struct sctp_datamsg
*datamsg
;
1786 bool wait_connect
= false;
1787 struct sctp_chunk
*chunk
;
1791 if (sinfo
->sinfo_stream
>= asoc
->stream
.outcnt
) {
1796 if (unlikely(!SCTP_SO(&asoc
->stream
, sinfo
->sinfo_stream
)->ext
)) {
1797 err
= sctp_stream_init_ext(&asoc
->stream
, sinfo
->sinfo_stream
);
1802 if (sp
->disable_fragments
&& msg_len
> asoc
->frag_point
) {
1807 if (asoc
->pmtu_pending
) {
1808 if (sp
->param_flags
& SPP_PMTUD_ENABLE
)
1809 sctp_assoc_sync_pmtu(asoc
);
1810 asoc
->pmtu_pending
= 0;
1813 if (sctp_wspace(asoc
) < (int)msg_len
)
1814 sctp_prsctp_prune(asoc
, sinfo
, msg_len
- sctp_wspace(asoc
));
1816 if (sk_under_memory_pressure(sk
))
1819 if (sctp_wspace(asoc
) <= 0 || !sk_wmem_schedule(sk
, msg_len
)) {
1820 timeo
= sock_sndtimeo(sk
, msg
->msg_flags
& MSG_DONTWAIT
);
1821 err
= sctp_wait_for_sndbuf(asoc
, &timeo
, msg_len
);
1826 if (sctp_state(asoc
, CLOSED
)) {
1827 err
= sctp_primitive_ASSOCIATE(net
, asoc
, NULL
);
1831 if (asoc
->ep
->intl_enable
) {
1832 timeo
= sock_sndtimeo(sk
, 0);
1833 err
= sctp_wait_for_connect(asoc
, &timeo
);
1839 wait_connect
= true;
1842 pr_debug("%s: we associated primitively\n", __func__
);
1845 datamsg
= sctp_datamsg_from_user(asoc
, sinfo
, &msg
->msg_iter
);
1846 if (IS_ERR(datamsg
)) {
1847 err
= PTR_ERR(datamsg
);
1851 asoc
->force_delay
= !!(msg
->msg_flags
& MSG_MORE
);
1853 list_for_each_entry(chunk
, &datamsg
->chunks
, frag_list
) {
1854 sctp_chunk_hold(chunk
);
1855 sctp_set_owner_w(chunk
);
1856 chunk
->transport
= transport
;
1859 err
= sctp_primitive_SEND(net
, asoc
, datamsg
);
1861 sctp_datamsg_free(datamsg
);
1865 pr_debug("%s: we sent primitively\n", __func__
);
1867 sctp_datamsg_put(datamsg
);
1869 if (unlikely(wait_connect
)) {
1870 timeo
= sock_sndtimeo(sk
, msg
->msg_flags
& MSG_DONTWAIT
);
1871 sctp_wait_for_connect(asoc
, &timeo
);
1880 static union sctp_addr
*sctp_sendmsg_get_daddr(struct sock
*sk
,
1881 const struct msghdr
*msg
,
1882 struct sctp_cmsgs
*cmsgs
)
1884 union sctp_addr
*daddr
= NULL
;
1887 if (!sctp_style(sk
, UDP_HIGH_BANDWIDTH
) && msg
->msg_name
) {
1888 int len
= msg
->msg_namelen
;
1890 if (len
> sizeof(*daddr
))
1891 len
= sizeof(*daddr
);
1893 daddr
= (union sctp_addr
*)msg
->msg_name
;
1895 err
= sctp_verify_addr(sk
, daddr
, len
);
1897 return ERR_PTR(err
);
1903 static void sctp_sendmsg_update_sinfo(struct sctp_association
*asoc
,
1904 struct sctp_sndrcvinfo
*sinfo
,
1905 struct sctp_cmsgs
*cmsgs
)
1907 if (!cmsgs
->srinfo
&& !cmsgs
->sinfo
) {
1908 sinfo
->sinfo_stream
= asoc
->default_stream
;
1909 sinfo
->sinfo_ppid
= asoc
->default_ppid
;
1910 sinfo
->sinfo_context
= asoc
->default_context
;
1911 sinfo
->sinfo_assoc_id
= sctp_assoc2id(asoc
);
1914 sinfo
->sinfo_flags
= asoc
->default_flags
;
1917 if (!cmsgs
->srinfo
&& !cmsgs
->prinfo
)
1918 sinfo
->sinfo_timetolive
= asoc
->default_timetolive
;
1920 if (cmsgs
->authinfo
) {
1921 /* Reuse sinfo_tsn to indicate that authinfo was set and
1922 * sinfo_ssn to save the keyid on tx path.
1924 sinfo
->sinfo_tsn
= 1;
1925 sinfo
->sinfo_ssn
= cmsgs
->authinfo
->auth_keynumber
;
1929 static int sctp_sendmsg(struct sock
*sk
, struct msghdr
*msg
, size_t msg_len
)
1931 struct sctp_endpoint
*ep
= sctp_sk(sk
)->ep
;
1932 struct sctp_transport
*transport
= NULL
;
1933 struct sctp_sndrcvinfo _sinfo
, *sinfo
;
1934 struct sctp_association
*asoc
, *tmp
;
1935 struct sctp_cmsgs cmsgs
;
1936 union sctp_addr
*daddr
;
1941 /* Parse and get snd_info */
1942 err
= sctp_sendmsg_parse(sk
, &cmsgs
, &_sinfo
, msg
, msg_len
);
1947 sflags
= sinfo
->sinfo_flags
;
1949 /* Get daddr from msg */
1950 daddr
= sctp_sendmsg_get_daddr(sk
, msg
, &cmsgs
);
1951 if (IS_ERR(daddr
)) {
1952 err
= PTR_ERR(daddr
);
1958 /* SCTP_SENDALL process */
1959 if ((sflags
& SCTP_SENDALL
) && sctp_style(sk
, UDP
)) {
1960 list_for_each_entry_safe(asoc
, tmp
, &ep
->asocs
, asocs
) {
1961 err
= sctp_sendmsg_check_sflags(asoc
, sflags
, msg
,
1968 sctp_sendmsg_update_sinfo(asoc
, sinfo
, &cmsgs
);
1970 err
= sctp_sendmsg_to_asoc(asoc
, msg
, msg_len
,
1975 iov_iter_revert(&msg
->msg_iter
, err
);
1981 /* Get and check or create asoc */
1983 asoc
= sctp_endpoint_lookup_assoc(ep
, daddr
, &transport
);
1985 err
= sctp_sendmsg_check_sflags(asoc
, sflags
, msg
,
1990 err
= sctp_sendmsg_new_asoc(sk
, sflags
, &cmsgs
, daddr
,
1995 asoc
= transport
->asoc
;
1999 if (!sctp_style(sk
, TCP
) && !(sflags
& SCTP_ADDR_OVER
))
2002 asoc
= sctp_id2assoc(sk
, sinfo
->sinfo_assoc_id
);
2008 err
= sctp_sendmsg_check_sflags(asoc
, sflags
, msg
, msg_len
);
2013 /* Update snd_info with the asoc */
2014 sctp_sendmsg_update_sinfo(asoc
, sinfo
, &cmsgs
);
2016 /* Send msg to the asoc */
2017 err
= sctp_sendmsg_to_asoc(asoc
, msg
, msg_len
, transport
, sinfo
);
2018 if (err
< 0 && err
!= -ESRCH
&& new)
2019 sctp_association_free(asoc
);
2024 return sctp_error(sk
, msg
->msg_flags
, err
);
2027 /* This is an extended version of skb_pull() that removes the data from the
2028 * start of a skb even when data is spread across the list of skb's in the
2029 * frag_list. len specifies the total amount of data that needs to be removed.
2030 * when 'len' bytes could be removed from the skb, it returns 0.
2031 * If 'len' exceeds the total skb length, it returns the no. of bytes that
2032 * could not be removed.
2034 static int sctp_skb_pull(struct sk_buff
*skb
, int len
)
2036 struct sk_buff
*list
;
2037 int skb_len
= skb_headlen(skb
);
2040 if (len
<= skb_len
) {
2041 __skb_pull(skb
, len
);
2045 __skb_pull(skb
, skb_len
);
2047 skb_walk_frags(skb
, list
) {
2048 rlen
= sctp_skb_pull(list
, len
);
2049 skb
->len
-= (len
-rlen
);
2050 skb
->data_len
-= (len
-rlen
);
2061 /* API 3.1.3 recvmsg() - UDP Style Syntax
2063 * ssize_t recvmsg(int socket, struct msghdr *message,
2066 * socket - the socket descriptor of the endpoint.
2067 * message - pointer to the msghdr structure which contains a single
2068 * user message and possibly some ancillary data.
2070 * See Section 5 for complete description of the data
2073 * flags - flags sent or received with the user message, see Section
2074 * 5 for complete description of the flags.
2076 static int sctp_recvmsg(struct sock
*sk
, struct msghdr
*msg
, size_t len
,
2077 int noblock
, int flags
, int *addr_len
)
2079 struct sctp_ulpevent
*event
= NULL
;
2080 struct sctp_sock
*sp
= sctp_sk(sk
);
2081 struct sk_buff
*skb
, *head_skb
;
2086 pr_debug("%s: sk:%p, msghdr:%p, len:%zd, noblock:%d, flags:0x%x, "
2087 "addr_len:%p)\n", __func__
, sk
, msg
, len
, noblock
, flags
,
2092 if (sctp_style(sk
, TCP
) && !sctp_sstate(sk
, ESTABLISHED
) &&
2093 !sctp_sstate(sk
, CLOSING
) && !sctp_sstate(sk
, CLOSED
)) {
2098 skb
= sctp_skb_recv_datagram(sk
, flags
, noblock
, &err
);
2102 /* Get the total length of the skb including any skb's in the
2111 err
= skb_copy_datagram_msg(skb
, 0, msg
, copied
);
2113 event
= sctp_skb2event(skb
);
2118 if (event
->chunk
&& event
->chunk
->head_skb
)
2119 head_skb
= event
->chunk
->head_skb
;
2122 sock_recv_ts_and_drops(msg
, sk
, head_skb
);
2123 if (sctp_ulpevent_is_notification(event
)) {
2124 msg
->msg_flags
|= MSG_NOTIFICATION
;
2125 sp
->pf
->event_msgname(event
, msg
->msg_name
, addr_len
);
2127 sp
->pf
->skb_msgname(head_skb
, msg
->msg_name
, addr_len
);
2130 /* Check if we allow SCTP_NXTINFO. */
2131 if (sp
->recvnxtinfo
)
2132 sctp_ulpevent_read_nxtinfo(event
, msg
, sk
);
2133 /* Check if we allow SCTP_RCVINFO. */
2134 if (sp
->recvrcvinfo
)
2135 sctp_ulpevent_read_rcvinfo(event
, msg
);
2136 /* Check if we allow SCTP_SNDRCVINFO. */
2137 if (sctp_ulpevent_type_enabled(sp
->subscribe
, SCTP_DATA_IO_EVENT
))
2138 sctp_ulpevent_read_sndrcvinfo(event
, msg
);
2142 /* If skb's length exceeds the user's buffer, update the skb and
2143 * push it back to the receive_queue so that the next call to
2144 * recvmsg() will return the remaining data. Don't set MSG_EOR.
2146 if (skb_len
> copied
) {
2147 msg
->msg_flags
&= ~MSG_EOR
;
2148 if (flags
& MSG_PEEK
)
2150 sctp_skb_pull(skb
, copied
);
2151 skb_queue_head(&sk
->sk_receive_queue
, skb
);
2153 /* When only partial message is copied to the user, increase
2154 * rwnd by that amount. If all the data in the skb is read,
2155 * rwnd is updated when the event is freed.
2157 if (!sctp_ulpevent_is_notification(event
))
2158 sctp_assoc_rwnd_increase(event
->asoc
, copied
);
2160 } else if ((event
->msg_flags
& MSG_NOTIFICATION
) ||
2161 (event
->msg_flags
& MSG_EOR
))
2162 msg
->msg_flags
|= MSG_EOR
;
2164 msg
->msg_flags
&= ~MSG_EOR
;
2167 if (flags
& MSG_PEEK
) {
2168 /* Release the skb reference acquired after peeking the skb in
2169 * sctp_skb_recv_datagram().
2173 /* Free the event which includes releasing the reference to
2174 * the owner of the skb, freeing the skb and updating the
2177 sctp_ulpevent_free(event
);
2184 /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS)
2186 * This option is a on/off flag. If enabled no SCTP message
2187 * fragmentation will be performed. Instead if a message being sent
2188 * exceeds the current PMTU size, the message will NOT be sent and
2189 * instead a error will be indicated to the user.
2191 static int sctp_setsockopt_disable_fragments(struct sock
*sk
,
2192 char __user
*optval
,
2193 unsigned int optlen
)
2197 if (optlen
< sizeof(int))
2200 if (get_user(val
, (int __user
*)optval
))
2203 sctp_sk(sk
)->disable_fragments
= (val
== 0) ? 0 : 1;
2208 static int sctp_setsockopt_events(struct sock
*sk
, char __user
*optval
,
2209 unsigned int optlen
)
2211 struct sctp_event_subscribe subscribe
;
2212 __u8
*sn_type
= (__u8
*)&subscribe
;
2213 struct sctp_sock
*sp
= sctp_sk(sk
);
2214 struct sctp_association
*asoc
;
2217 if (optlen
> sizeof(struct sctp_event_subscribe
))
2220 if (copy_from_user(&subscribe
, optval
, optlen
))
2223 for (i
= 0; i
< optlen
; i
++)
2224 sctp_ulpevent_type_set(&sp
->subscribe
, SCTP_SN_TYPE_BASE
+ i
,
2227 list_for_each_entry(asoc
, &sp
->ep
->asocs
, asocs
)
2228 asoc
->subscribe
= sctp_sk(sk
)->subscribe
;
2230 /* At the time when a user app subscribes to SCTP_SENDER_DRY_EVENT,
2231 * if there is no data to be sent or retransmit, the stack will
2232 * immediately send up this notification.
2234 if (sctp_ulpevent_type_enabled(sp
->subscribe
, SCTP_SENDER_DRY_EVENT
)) {
2235 struct sctp_ulpevent
*event
;
2237 asoc
= sctp_id2assoc(sk
, 0);
2238 if (asoc
&& sctp_outq_is_empty(&asoc
->outqueue
)) {
2239 event
= sctp_ulpevent_make_sender_dry_event(asoc
,
2240 GFP_USER
| __GFP_NOWARN
);
2244 asoc
->stream
.si
->enqueue_event(&asoc
->ulpq
, event
);
2251 /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE)
2253 * This socket option is applicable to the UDP-style socket only. When
2254 * set it will cause associations that are idle for more than the
2255 * specified number of seconds to automatically close. An association
2256 * being idle is defined an association that has NOT sent or received
2257 * user data. The special value of '0' indicates that no automatic
2258 * close of any associations should be performed. The option expects an
2259 * integer defining the number of seconds of idle time before an
2260 * association is closed.
2262 static int sctp_setsockopt_autoclose(struct sock
*sk
, char __user
*optval
,
2263 unsigned int optlen
)
2265 struct sctp_sock
*sp
= sctp_sk(sk
);
2266 struct net
*net
= sock_net(sk
);
2268 /* Applicable to UDP-style socket only */
2269 if (sctp_style(sk
, TCP
))
2271 if (optlen
!= sizeof(int))
2273 if (copy_from_user(&sp
->autoclose
, optval
, optlen
))
2276 if (sp
->autoclose
> net
->sctp
.max_autoclose
)
2277 sp
->autoclose
= net
->sctp
.max_autoclose
;
2282 /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS)
2284 * Applications can enable or disable heartbeats for any peer address of
2285 * an association, modify an address's heartbeat interval, force a
2286 * heartbeat to be sent immediately, and adjust the address's maximum
2287 * number of retransmissions sent before an address is considered
2288 * unreachable. The following structure is used to access and modify an
2289 * address's parameters:
2291 * struct sctp_paddrparams {
2292 * sctp_assoc_t spp_assoc_id;
2293 * struct sockaddr_storage spp_address;
2294 * uint32_t spp_hbinterval;
2295 * uint16_t spp_pathmaxrxt;
2296 * uint32_t spp_pathmtu;
2297 * uint32_t spp_sackdelay;
2298 * uint32_t spp_flags;
2299 * uint32_t spp_ipv6_flowlabel;
2303 * spp_assoc_id - (one-to-many style socket) This is filled in the
2304 * application, and identifies the association for
2306 * spp_address - This specifies which address is of interest.
2307 * spp_hbinterval - This contains the value of the heartbeat interval,
2308 * in milliseconds. If a value of zero
2309 * is present in this field then no changes are to
2310 * be made to this parameter.
2311 * spp_pathmaxrxt - This contains the maximum number of
2312 * retransmissions before this address shall be
2313 * considered unreachable. If a value of zero
2314 * is present in this field then no changes are to
2315 * be made to this parameter.
2316 * spp_pathmtu - When Path MTU discovery is disabled the value
2317 * specified here will be the "fixed" path mtu.
2318 * Note that if the spp_address field is empty
2319 * then all associations on this address will
2320 * have this fixed path mtu set upon them.
2322 * spp_sackdelay - When delayed sack is enabled, this value specifies
2323 * the number of milliseconds that sacks will be delayed
2324 * for. This value will apply to all addresses of an
2325 * association if the spp_address field is empty. Note
2326 * also, that if delayed sack is enabled and this
2327 * value is set to 0, no change is made to the last
2328 * recorded delayed sack timer value.
2330 * spp_flags - These flags are used to control various features
2331 * on an association. The flag field may contain
2332 * zero or more of the following options.
2334 * SPP_HB_ENABLE - Enable heartbeats on the
2335 * specified address. Note that if the address
2336 * field is empty all addresses for the association
2337 * have heartbeats enabled upon them.
2339 * SPP_HB_DISABLE - Disable heartbeats on the
2340 * speicifed address. Note that if the address
2341 * field is empty all addresses for the association
2342 * will have their heartbeats disabled. Note also
2343 * that SPP_HB_ENABLE and SPP_HB_DISABLE are
2344 * mutually exclusive, only one of these two should
2345 * be specified. Enabling both fields will have
2346 * undetermined results.
2348 * SPP_HB_DEMAND - Request a user initiated heartbeat
2349 * to be made immediately.
2351 * SPP_HB_TIME_IS_ZERO - Specify's that the time for
2352 * heartbeat delayis to be set to the value of 0
2355 * SPP_PMTUD_ENABLE - This field will enable PMTU
2356 * discovery upon the specified address. Note that
2357 * if the address feild is empty then all addresses
2358 * on the association are effected.
2360 * SPP_PMTUD_DISABLE - This field will disable PMTU
2361 * discovery upon the specified address. Note that
2362 * if the address feild is empty then all addresses
2363 * on the association are effected. Not also that
2364 * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually
2365 * exclusive. Enabling both will have undetermined
2368 * SPP_SACKDELAY_ENABLE - Setting this flag turns
2369 * on delayed sack. The time specified in spp_sackdelay
2370 * is used to specify the sack delay for this address. Note
2371 * that if spp_address is empty then all addresses will
2372 * enable delayed sack and take on the sack delay
2373 * value specified in spp_sackdelay.
2374 * SPP_SACKDELAY_DISABLE - Setting this flag turns
2375 * off delayed sack. If the spp_address field is blank then
2376 * delayed sack is disabled for the entire association. Note
2377 * also that this field is mutually exclusive to
2378 * SPP_SACKDELAY_ENABLE, setting both will have undefined
2381 * SPP_IPV6_FLOWLABEL: Setting this flag enables the
2382 * setting of the IPV6 flow label value. The value is
2383 * contained in the spp_ipv6_flowlabel field.
2384 * Upon retrieval, this flag will be set to indicate that
2385 * the spp_ipv6_flowlabel field has a valid value returned.
2386 * If a specific destination address is set (in the
2387 * spp_address field), then the value returned is that of
2388 * the address. If just an association is specified (and
2389 * no address), then the association's default flow label
2390 * is returned. If neither an association nor a destination
2391 * is specified, then the socket's default flow label is
2392 * returned. For non-IPv6 sockets, this flag will be left
2395 * SPP_DSCP: Setting this flag enables the setting of the
2396 * Differentiated Services Code Point (DSCP) value
2397 * associated with either the association or a specific
2398 * address. The value is obtained in the spp_dscp field.
2399 * Upon retrieval, this flag will be set to indicate that
2400 * the spp_dscp field has a valid value returned. If a
2401 * specific destination address is set when called (in the
2402 * spp_address field), then that specific destination
2403 * address's DSCP value is returned. If just an association
2404 * is specified, then the association's default DSCP is
2405 * returned. If neither an association nor a destination is
2406 * specified, then the socket's default DSCP is returned.
2408 * spp_ipv6_flowlabel
2409 * - This field is used in conjunction with the
2410 * SPP_IPV6_FLOWLABEL flag and contains the IPv6 flow label.
2411 * The 20 least significant bits are used for the flow
2412 * label. This setting has precedence over any IPv6-layer
2415 * spp_dscp - This field is used in conjunction with the SPP_DSCP flag
2416 * and contains the DSCP. The 6 most significant bits are
2417 * used for the DSCP. This setting has precedence over any
2418 * IPv4- or IPv6- layer setting.
2420 static int sctp_apply_peer_addr_params(struct sctp_paddrparams
*params
,
2421 struct sctp_transport
*trans
,
2422 struct sctp_association
*asoc
,
2423 struct sctp_sock
*sp
,
2426 int sackdelay_change
)
2430 if (params
->spp_flags
& SPP_HB_DEMAND
&& trans
) {
2431 struct net
*net
= sock_net(trans
->asoc
->base
.sk
);
2433 error
= sctp_primitive_REQUESTHEARTBEAT(net
, trans
->asoc
, trans
);
2438 /* Note that unless the spp_flag is set to SPP_HB_ENABLE the value of
2439 * this field is ignored. Note also that a value of zero indicates
2440 * the current setting should be left unchanged.
2442 if (params
->spp_flags
& SPP_HB_ENABLE
) {
2444 /* Re-zero the interval if the SPP_HB_TIME_IS_ZERO is
2445 * set. This lets us use 0 value when this flag
2448 if (params
->spp_flags
& SPP_HB_TIME_IS_ZERO
)
2449 params
->spp_hbinterval
= 0;
2451 if (params
->spp_hbinterval
||
2452 (params
->spp_flags
& SPP_HB_TIME_IS_ZERO
)) {
2455 msecs_to_jiffies(params
->spp_hbinterval
);
2458 msecs_to_jiffies(params
->spp_hbinterval
);
2460 sp
->hbinterval
= params
->spp_hbinterval
;
2467 trans
->param_flags
=
2468 (trans
->param_flags
& ~SPP_HB
) | hb_change
;
2471 (asoc
->param_flags
& ~SPP_HB
) | hb_change
;
2474 (sp
->param_flags
& ~SPP_HB
) | hb_change
;
2478 /* When Path MTU discovery is disabled the value specified here will
2479 * be the "fixed" path mtu (i.e. the value of the spp_flags field must
2480 * include the flag SPP_PMTUD_DISABLE for this field to have any
2483 if ((params
->spp_flags
& SPP_PMTUD_DISABLE
) && params
->spp_pathmtu
) {
2485 trans
->pathmtu
= params
->spp_pathmtu
;
2486 sctp_assoc_sync_pmtu(asoc
);
2488 sctp_assoc_set_pmtu(asoc
, params
->spp_pathmtu
);
2490 sp
->pathmtu
= params
->spp_pathmtu
;
2496 int update
= (trans
->param_flags
& SPP_PMTUD_DISABLE
) &&
2497 (params
->spp_flags
& SPP_PMTUD_ENABLE
);
2498 trans
->param_flags
=
2499 (trans
->param_flags
& ~SPP_PMTUD
) | pmtud_change
;
2501 sctp_transport_pmtu(trans
, sctp_opt2sk(sp
));
2502 sctp_assoc_sync_pmtu(asoc
);
2506 (asoc
->param_flags
& ~SPP_PMTUD
) | pmtud_change
;
2509 (sp
->param_flags
& ~SPP_PMTUD
) | pmtud_change
;
2513 /* Note that unless the spp_flag is set to SPP_SACKDELAY_ENABLE the
2514 * value of this field is ignored. Note also that a value of zero
2515 * indicates the current setting should be left unchanged.
2517 if ((params
->spp_flags
& SPP_SACKDELAY_ENABLE
) && params
->spp_sackdelay
) {
2520 msecs_to_jiffies(params
->spp_sackdelay
);
2523 msecs_to_jiffies(params
->spp_sackdelay
);
2525 sp
->sackdelay
= params
->spp_sackdelay
;
2529 if (sackdelay_change
) {
2531 trans
->param_flags
=
2532 (trans
->param_flags
& ~SPP_SACKDELAY
) |
2536 (asoc
->param_flags
& ~SPP_SACKDELAY
) |
2540 (sp
->param_flags
& ~SPP_SACKDELAY
) |
2545 /* Note that a value of zero indicates the current setting should be
2548 if (params
->spp_pathmaxrxt
) {
2550 trans
->pathmaxrxt
= params
->spp_pathmaxrxt
;
2552 asoc
->pathmaxrxt
= params
->spp_pathmaxrxt
;
2554 sp
->pathmaxrxt
= params
->spp_pathmaxrxt
;
2558 if (params
->spp_flags
& SPP_IPV6_FLOWLABEL
) {
2560 if (trans
->ipaddr
.sa
.sa_family
== AF_INET6
) {
2561 trans
->flowlabel
= params
->spp_ipv6_flowlabel
&
2562 SCTP_FLOWLABEL_VAL_MASK
;
2563 trans
->flowlabel
|= SCTP_FLOWLABEL_SET_MASK
;
2566 struct sctp_transport
*t
;
2568 list_for_each_entry(t
, &asoc
->peer
.transport_addr_list
,
2570 if (t
->ipaddr
.sa
.sa_family
!= AF_INET6
)
2572 t
->flowlabel
= params
->spp_ipv6_flowlabel
&
2573 SCTP_FLOWLABEL_VAL_MASK
;
2574 t
->flowlabel
|= SCTP_FLOWLABEL_SET_MASK
;
2576 asoc
->flowlabel
= params
->spp_ipv6_flowlabel
&
2577 SCTP_FLOWLABEL_VAL_MASK
;
2578 asoc
->flowlabel
|= SCTP_FLOWLABEL_SET_MASK
;
2579 } else if (sctp_opt2sk(sp
)->sk_family
== AF_INET6
) {
2580 sp
->flowlabel
= params
->spp_ipv6_flowlabel
&
2581 SCTP_FLOWLABEL_VAL_MASK
;
2582 sp
->flowlabel
|= SCTP_FLOWLABEL_SET_MASK
;
2586 if (params
->spp_flags
& SPP_DSCP
) {
2588 trans
->dscp
= params
->spp_dscp
& SCTP_DSCP_VAL_MASK
;
2589 trans
->dscp
|= SCTP_DSCP_SET_MASK
;
2591 struct sctp_transport
*t
;
2593 list_for_each_entry(t
, &asoc
->peer
.transport_addr_list
,
2595 t
->dscp
= params
->spp_dscp
&
2597 t
->dscp
|= SCTP_DSCP_SET_MASK
;
2599 asoc
->dscp
= params
->spp_dscp
& SCTP_DSCP_VAL_MASK
;
2600 asoc
->dscp
|= SCTP_DSCP_SET_MASK
;
2602 sp
->dscp
= params
->spp_dscp
& SCTP_DSCP_VAL_MASK
;
2603 sp
->dscp
|= SCTP_DSCP_SET_MASK
;
2610 static int sctp_setsockopt_peer_addr_params(struct sock
*sk
,
2611 char __user
*optval
,
2612 unsigned int optlen
)
2614 struct sctp_paddrparams params
;
2615 struct sctp_transport
*trans
= NULL
;
2616 struct sctp_association
*asoc
= NULL
;
2617 struct sctp_sock
*sp
= sctp_sk(sk
);
2619 int hb_change
, pmtud_change
, sackdelay_change
;
2621 if (optlen
== sizeof(params
)) {
2622 if (copy_from_user(¶ms
, optval
, optlen
))
2624 } else if (optlen
== ALIGN(offsetof(struct sctp_paddrparams
,
2625 spp_ipv6_flowlabel
), 4)) {
2626 if (copy_from_user(¶ms
, optval
, optlen
))
2628 if (params
.spp_flags
& (SPP_DSCP
| SPP_IPV6_FLOWLABEL
))
2634 /* Validate flags and value parameters. */
2635 hb_change
= params
.spp_flags
& SPP_HB
;
2636 pmtud_change
= params
.spp_flags
& SPP_PMTUD
;
2637 sackdelay_change
= params
.spp_flags
& SPP_SACKDELAY
;
2639 if (hb_change
== SPP_HB
||
2640 pmtud_change
== SPP_PMTUD
||
2641 sackdelay_change
== SPP_SACKDELAY
||
2642 params
.spp_sackdelay
> 500 ||
2643 (params
.spp_pathmtu
&&
2644 params
.spp_pathmtu
< SCTP_DEFAULT_MINSEGMENT
))
2647 /* If an address other than INADDR_ANY is specified, and
2648 * no transport is found, then the request is invalid.
2650 if (!sctp_is_any(sk
, (union sctp_addr
*)¶ms
.spp_address
)) {
2651 trans
= sctp_addr_id2transport(sk
, ¶ms
.spp_address
,
2652 params
.spp_assoc_id
);
2657 /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
2658 * socket is a one to many style socket, and an association
2659 * was not found, then the id was invalid.
2661 asoc
= sctp_id2assoc(sk
, params
.spp_assoc_id
);
2662 if (!asoc
&& params
.spp_assoc_id
!= SCTP_FUTURE_ASSOC
&&
2663 sctp_style(sk
, UDP
))
2666 /* Heartbeat demand can only be sent on a transport or
2667 * association, but not a socket.
2669 if (params
.spp_flags
& SPP_HB_DEMAND
&& !trans
&& !asoc
)
2672 /* Process parameters. */
2673 error
= sctp_apply_peer_addr_params(¶ms
, trans
, asoc
, sp
,
2674 hb_change
, pmtud_change
,
2680 /* If changes are for association, also apply parameters to each
2683 if (!trans
&& asoc
) {
2684 list_for_each_entry(trans
, &asoc
->peer
.transport_addr_list
,
2686 sctp_apply_peer_addr_params(¶ms
, trans
, asoc
, sp
,
2687 hb_change
, pmtud_change
,
2695 static inline __u32
sctp_spp_sackdelay_enable(__u32 param_flags
)
2697 return (param_flags
& ~SPP_SACKDELAY
) | SPP_SACKDELAY_ENABLE
;
2700 static inline __u32
sctp_spp_sackdelay_disable(__u32 param_flags
)
2702 return (param_flags
& ~SPP_SACKDELAY
) | SPP_SACKDELAY_DISABLE
;
2705 static void sctp_apply_asoc_delayed_ack(struct sctp_sack_info
*params
,
2706 struct sctp_association
*asoc
)
2708 struct sctp_transport
*trans
;
2710 if (params
->sack_delay
) {
2711 asoc
->sackdelay
= msecs_to_jiffies(params
->sack_delay
);
2713 sctp_spp_sackdelay_enable(asoc
->param_flags
);
2715 if (params
->sack_freq
== 1) {
2717 sctp_spp_sackdelay_disable(asoc
->param_flags
);
2718 } else if (params
->sack_freq
> 1) {
2719 asoc
->sackfreq
= params
->sack_freq
;
2721 sctp_spp_sackdelay_enable(asoc
->param_flags
);
2724 list_for_each_entry(trans
, &asoc
->peer
.transport_addr_list
,
2726 if (params
->sack_delay
) {
2727 trans
->sackdelay
= msecs_to_jiffies(params
->sack_delay
);
2728 trans
->param_flags
=
2729 sctp_spp_sackdelay_enable(trans
->param_flags
);
2731 if (params
->sack_freq
== 1) {
2732 trans
->param_flags
=
2733 sctp_spp_sackdelay_disable(trans
->param_flags
);
2734 } else if (params
->sack_freq
> 1) {
2735 trans
->sackfreq
= params
->sack_freq
;
2736 trans
->param_flags
=
2737 sctp_spp_sackdelay_enable(trans
->param_flags
);
2743 * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK)
2745 * This option will effect the way delayed acks are performed. This
2746 * option allows you to get or set the delayed ack time, in
2747 * milliseconds. It also allows changing the delayed ack frequency.
2748 * Changing the frequency to 1 disables the delayed sack algorithm. If
2749 * the assoc_id is 0, then this sets or gets the endpoints default
2750 * values. If the assoc_id field is non-zero, then the set or get
2751 * effects the specified association for the one to many model (the
2752 * assoc_id field is ignored by the one to one model). Note that if
2753 * sack_delay or sack_freq are 0 when setting this option, then the
2754 * current values will remain unchanged.
2756 * struct sctp_sack_info {
2757 * sctp_assoc_t sack_assoc_id;
2758 * uint32_t sack_delay;
2759 * uint32_t sack_freq;
2762 * sack_assoc_id - This parameter, indicates which association the user
2763 * is performing an action upon. Note that if this field's value is
2764 * zero then the endpoints default value is changed (effecting future
2765 * associations only).
2767 * sack_delay - This parameter contains the number of milliseconds that
2768 * the user is requesting the delayed ACK timer be set to. Note that
2769 * this value is defined in the standard to be between 200 and 500
2772 * sack_freq - This parameter contains the number of packets that must
2773 * be received before a sack is sent without waiting for the delay
2774 * timer to expire. The default value for this is 2, setting this
2775 * value to 1 will disable the delayed sack algorithm.
2778 static int sctp_setsockopt_delayed_ack(struct sock
*sk
,
2779 char __user
*optval
, unsigned int optlen
)
2781 struct sctp_sock
*sp
= sctp_sk(sk
);
2782 struct sctp_association
*asoc
;
2783 struct sctp_sack_info params
;
2785 if (optlen
== sizeof(struct sctp_sack_info
)) {
2786 if (copy_from_user(¶ms
, optval
, optlen
))
2789 if (params
.sack_delay
== 0 && params
.sack_freq
== 0)
2791 } else if (optlen
== sizeof(struct sctp_assoc_value
)) {
2792 pr_warn_ratelimited(DEPRECATED
2794 "Use of struct sctp_assoc_value in delayed_ack socket option.\n"
2795 "Use struct sctp_sack_info instead\n",
2796 current
->comm
, task_pid_nr(current
));
2797 if (copy_from_user(¶ms
, optval
, optlen
))
2800 if (params
.sack_delay
== 0)
2801 params
.sack_freq
= 1;
2803 params
.sack_freq
= 0;
2807 /* Validate value parameter. */
2808 if (params
.sack_delay
> 500)
2811 /* Get association, if sack_assoc_id != SCTP_FUTURE_ASSOC and the
2812 * socket is a one to many style socket, and an association
2813 * was not found, then the id was invalid.
2815 asoc
= sctp_id2assoc(sk
, params
.sack_assoc_id
);
2816 if (!asoc
&& params
.sack_assoc_id
> SCTP_ALL_ASSOC
&&
2817 sctp_style(sk
, UDP
))
2821 sctp_apply_asoc_delayed_ack(¶ms
, asoc
);
2826 if (sctp_style(sk
, TCP
))
2827 params
.sack_assoc_id
= SCTP_FUTURE_ASSOC
;
2829 if (params
.sack_assoc_id
== SCTP_FUTURE_ASSOC
||
2830 params
.sack_assoc_id
== SCTP_ALL_ASSOC
) {
2831 if (params
.sack_delay
) {
2832 sp
->sackdelay
= params
.sack_delay
;
2834 sctp_spp_sackdelay_enable(sp
->param_flags
);
2836 if (params
.sack_freq
== 1) {
2838 sctp_spp_sackdelay_disable(sp
->param_flags
);
2839 } else if (params
.sack_freq
> 1) {
2840 sp
->sackfreq
= params
.sack_freq
;
2842 sctp_spp_sackdelay_enable(sp
->param_flags
);
2846 if (params
.sack_assoc_id
== SCTP_CURRENT_ASSOC
||
2847 params
.sack_assoc_id
== SCTP_ALL_ASSOC
)
2848 list_for_each_entry(asoc
, &sp
->ep
->asocs
, asocs
)
2849 sctp_apply_asoc_delayed_ack(¶ms
, asoc
);
2854 /* 7.1.3 Initialization Parameters (SCTP_INITMSG)
2856 * Applications can specify protocol parameters for the default association
2857 * initialization. The option name argument to setsockopt() and getsockopt()
2860 * Setting initialization parameters is effective only on an unconnected
2861 * socket (for UDP-style sockets only future associations are effected
2862 * by the change). With TCP-style sockets, this option is inherited by
2863 * sockets derived from a listener socket.
2865 static int sctp_setsockopt_initmsg(struct sock
*sk
, char __user
*optval
, unsigned int optlen
)
2867 struct sctp_initmsg sinit
;
2868 struct sctp_sock
*sp
= sctp_sk(sk
);
2870 if (optlen
!= sizeof(struct sctp_initmsg
))
2872 if (copy_from_user(&sinit
, optval
, optlen
))
2875 if (sinit
.sinit_num_ostreams
)
2876 sp
->initmsg
.sinit_num_ostreams
= sinit
.sinit_num_ostreams
;
2877 if (sinit
.sinit_max_instreams
)
2878 sp
->initmsg
.sinit_max_instreams
= sinit
.sinit_max_instreams
;
2879 if (sinit
.sinit_max_attempts
)
2880 sp
->initmsg
.sinit_max_attempts
= sinit
.sinit_max_attempts
;
2881 if (sinit
.sinit_max_init_timeo
)
2882 sp
->initmsg
.sinit_max_init_timeo
= sinit
.sinit_max_init_timeo
;
2888 * 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM)
2890 * Applications that wish to use the sendto() system call may wish to
2891 * specify a default set of parameters that would normally be supplied
2892 * through the inclusion of ancillary data. This socket option allows
2893 * such an application to set the default sctp_sndrcvinfo structure.
2894 * The application that wishes to use this socket option simply passes
2895 * in to this call the sctp_sndrcvinfo structure defined in Section
2896 * 5.2.2) The input parameters accepted by this call include
2897 * sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context,
2898 * sinfo_timetolive. The user must provide the sinfo_assoc_id field in
2899 * to this call if the caller is using the UDP model.
2901 static int sctp_setsockopt_default_send_param(struct sock
*sk
,
2902 char __user
*optval
,
2903 unsigned int optlen
)
2905 struct sctp_sock
*sp
= sctp_sk(sk
);
2906 struct sctp_association
*asoc
;
2907 struct sctp_sndrcvinfo info
;
2909 if (optlen
!= sizeof(info
))
2911 if (copy_from_user(&info
, optval
, optlen
))
2913 if (info
.sinfo_flags
&
2914 ~(SCTP_UNORDERED
| SCTP_ADDR_OVER
|
2915 SCTP_ABORT
| SCTP_EOF
))
2918 asoc
= sctp_id2assoc(sk
, info
.sinfo_assoc_id
);
2919 if (!asoc
&& info
.sinfo_assoc_id
> SCTP_ALL_ASSOC
&&
2920 sctp_style(sk
, UDP
))
2924 asoc
->default_stream
= info
.sinfo_stream
;
2925 asoc
->default_flags
= info
.sinfo_flags
;
2926 asoc
->default_ppid
= info
.sinfo_ppid
;
2927 asoc
->default_context
= info
.sinfo_context
;
2928 asoc
->default_timetolive
= info
.sinfo_timetolive
;
2933 if (sctp_style(sk
, TCP
))
2934 info
.sinfo_assoc_id
= SCTP_FUTURE_ASSOC
;
2936 if (info
.sinfo_assoc_id
== SCTP_FUTURE_ASSOC
||
2937 info
.sinfo_assoc_id
== SCTP_ALL_ASSOC
) {
2938 sp
->default_stream
= info
.sinfo_stream
;
2939 sp
->default_flags
= info
.sinfo_flags
;
2940 sp
->default_ppid
= info
.sinfo_ppid
;
2941 sp
->default_context
= info
.sinfo_context
;
2942 sp
->default_timetolive
= info
.sinfo_timetolive
;
2945 if (info
.sinfo_assoc_id
== SCTP_CURRENT_ASSOC
||
2946 info
.sinfo_assoc_id
== SCTP_ALL_ASSOC
) {
2947 list_for_each_entry(asoc
, &sp
->ep
->asocs
, asocs
) {
2948 asoc
->default_stream
= info
.sinfo_stream
;
2949 asoc
->default_flags
= info
.sinfo_flags
;
2950 asoc
->default_ppid
= info
.sinfo_ppid
;
2951 asoc
->default_context
= info
.sinfo_context
;
2952 asoc
->default_timetolive
= info
.sinfo_timetolive
;
2959 /* RFC6458, Section 8.1.31. Set/get Default Send Parameters
2960 * (SCTP_DEFAULT_SNDINFO)
2962 static int sctp_setsockopt_default_sndinfo(struct sock
*sk
,
2963 char __user
*optval
,
2964 unsigned int optlen
)
2966 struct sctp_sock
*sp
= sctp_sk(sk
);
2967 struct sctp_association
*asoc
;
2968 struct sctp_sndinfo info
;
2970 if (optlen
!= sizeof(info
))
2972 if (copy_from_user(&info
, optval
, optlen
))
2974 if (info
.snd_flags
&
2975 ~(SCTP_UNORDERED
| SCTP_ADDR_OVER
|
2976 SCTP_ABORT
| SCTP_EOF
))
2979 asoc
= sctp_id2assoc(sk
, info
.snd_assoc_id
);
2980 if (!asoc
&& info
.snd_assoc_id
> SCTP_ALL_ASSOC
&&
2981 sctp_style(sk
, UDP
))
2985 asoc
->default_stream
= info
.snd_sid
;
2986 asoc
->default_flags
= info
.snd_flags
;
2987 asoc
->default_ppid
= info
.snd_ppid
;
2988 asoc
->default_context
= info
.snd_context
;
2993 if (sctp_style(sk
, TCP
))
2994 info
.snd_assoc_id
= SCTP_FUTURE_ASSOC
;
2996 if (info
.snd_assoc_id
== SCTP_FUTURE_ASSOC
||
2997 info
.snd_assoc_id
== SCTP_ALL_ASSOC
) {
2998 sp
->default_stream
= info
.snd_sid
;
2999 sp
->default_flags
= info
.snd_flags
;
3000 sp
->default_ppid
= info
.snd_ppid
;
3001 sp
->default_context
= info
.snd_context
;
3004 if (info
.snd_assoc_id
== SCTP_CURRENT_ASSOC
||
3005 info
.snd_assoc_id
== SCTP_ALL_ASSOC
) {
3006 list_for_each_entry(asoc
, &sp
->ep
->asocs
, asocs
) {
3007 asoc
->default_stream
= info
.snd_sid
;
3008 asoc
->default_flags
= info
.snd_flags
;
3009 asoc
->default_ppid
= info
.snd_ppid
;
3010 asoc
->default_context
= info
.snd_context
;
3017 /* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
3019 * Requests that the local SCTP stack use the enclosed peer address as
3020 * the association primary. The enclosed address must be one of the
3021 * association peer's addresses.
3023 static int sctp_setsockopt_primary_addr(struct sock
*sk
, char __user
*optval
,
3024 unsigned int optlen
)
3026 struct sctp_prim prim
;
3027 struct sctp_transport
*trans
;
3031 if (optlen
!= sizeof(struct sctp_prim
))
3034 if (copy_from_user(&prim
, optval
, sizeof(struct sctp_prim
)))
3037 /* Allow security module to validate address but need address len. */
3038 af
= sctp_get_af_specific(prim
.ssp_addr
.ss_family
);
3042 err
= security_sctp_bind_connect(sk
, SCTP_PRIMARY_ADDR
,
3043 (struct sockaddr
*)&prim
.ssp_addr
,
3048 trans
= sctp_addr_id2transport(sk
, &prim
.ssp_addr
, prim
.ssp_assoc_id
);
3052 sctp_assoc_set_primary(trans
->asoc
, trans
);
3058 * 7.1.5 SCTP_NODELAY
3060 * Turn on/off any Nagle-like algorithm. This means that packets are
3061 * generally sent as soon as possible and no unnecessary delays are
3062 * introduced, at the cost of more packets in the network. Expects an
3063 * integer boolean flag.
3065 static int sctp_setsockopt_nodelay(struct sock
*sk
, char __user
*optval
,
3066 unsigned int optlen
)
3070 if (optlen
< sizeof(int))
3072 if (get_user(val
, (int __user
*)optval
))
3075 sctp_sk(sk
)->nodelay
= (val
== 0) ? 0 : 1;
3081 * 7.1.1 SCTP_RTOINFO
3083 * The protocol parameters used to initialize and bound retransmission
3084 * timeout (RTO) are tunable. sctp_rtoinfo structure is used to access
3085 * and modify these parameters.
3086 * All parameters are time values, in milliseconds. A value of 0, when
3087 * modifying the parameters, indicates that the current value should not
3091 static int sctp_setsockopt_rtoinfo(struct sock
*sk
, char __user
*optval
, unsigned int optlen
)
3093 struct sctp_rtoinfo rtoinfo
;
3094 struct sctp_association
*asoc
;
3095 unsigned long rto_min
, rto_max
;
3096 struct sctp_sock
*sp
= sctp_sk(sk
);
3098 if (optlen
!= sizeof (struct sctp_rtoinfo
))
3101 if (copy_from_user(&rtoinfo
, optval
, optlen
))
3104 asoc
= sctp_id2assoc(sk
, rtoinfo
.srto_assoc_id
);
3106 /* Set the values to the specific association */
3107 if (!asoc
&& rtoinfo
.srto_assoc_id
!= SCTP_FUTURE_ASSOC
&&
3108 sctp_style(sk
, UDP
))
3111 rto_max
= rtoinfo
.srto_max
;
3112 rto_min
= rtoinfo
.srto_min
;
3115 rto_max
= asoc
? msecs_to_jiffies(rto_max
) : rto_max
;
3117 rto_max
= asoc
? asoc
->rto_max
: sp
->rtoinfo
.srto_max
;
3120 rto_min
= asoc
? msecs_to_jiffies(rto_min
) : rto_min
;
3122 rto_min
= asoc
? asoc
->rto_min
: sp
->rtoinfo
.srto_min
;
3124 if (rto_min
> rto_max
)
3128 if (rtoinfo
.srto_initial
!= 0)
3130 msecs_to_jiffies(rtoinfo
.srto_initial
);
3131 asoc
->rto_max
= rto_max
;
3132 asoc
->rto_min
= rto_min
;
3134 /* If there is no association or the association-id = 0
3135 * set the values to the endpoint.
3137 if (rtoinfo
.srto_initial
!= 0)
3138 sp
->rtoinfo
.srto_initial
= rtoinfo
.srto_initial
;
3139 sp
->rtoinfo
.srto_max
= rto_max
;
3140 sp
->rtoinfo
.srto_min
= rto_min
;
3148 * 7.1.2 SCTP_ASSOCINFO
3150 * This option is used to tune the maximum retransmission attempts
3151 * of the association.
3152 * Returns an error if the new association retransmission value is
3153 * greater than the sum of the retransmission value of the peer.
3154 * See [SCTP] for more information.
3157 static int sctp_setsockopt_associnfo(struct sock
*sk
, char __user
*optval
, unsigned int optlen
)
3160 struct sctp_assocparams assocparams
;
3161 struct sctp_association
*asoc
;
3163 if (optlen
!= sizeof(struct sctp_assocparams
))
3165 if (copy_from_user(&assocparams
, optval
, optlen
))
3168 asoc
= sctp_id2assoc(sk
, assocparams
.sasoc_assoc_id
);
3170 if (!asoc
&& assocparams
.sasoc_assoc_id
!= SCTP_FUTURE_ASSOC
&&
3171 sctp_style(sk
, UDP
))
3174 /* Set the values to the specific association */
3176 if (assocparams
.sasoc_asocmaxrxt
!= 0) {
3179 struct sctp_transport
*peer_addr
;
3181 list_for_each_entry(peer_addr
, &asoc
->peer
.transport_addr_list
,
3183 path_sum
+= peer_addr
->pathmaxrxt
;
3187 /* Only validate asocmaxrxt if we have more than
3188 * one path/transport. We do this because path
3189 * retransmissions are only counted when we have more
3193 assocparams
.sasoc_asocmaxrxt
> path_sum
)
3196 asoc
->max_retrans
= assocparams
.sasoc_asocmaxrxt
;
3199 if (assocparams
.sasoc_cookie_life
!= 0)
3200 asoc
->cookie_life
= ms_to_ktime(assocparams
.sasoc_cookie_life
);
3202 /* Set the values to the endpoint */
3203 struct sctp_sock
*sp
= sctp_sk(sk
);
3205 if (assocparams
.sasoc_asocmaxrxt
!= 0)
3206 sp
->assocparams
.sasoc_asocmaxrxt
=
3207 assocparams
.sasoc_asocmaxrxt
;
3208 if (assocparams
.sasoc_cookie_life
!= 0)
3209 sp
->assocparams
.sasoc_cookie_life
=
3210 assocparams
.sasoc_cookie_life
;
3216 * 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR)
3218 * This socket option is a boolean flag which turns on or off mapped V4
3219 * addresses. If this option is turned on and the socket is type
3220 * PF_INET6, then IPv4 addresses will be mapped to V6 representation.
3221 * If this option is turned off, then no mapping will be done of V4
3222 * addresses and a user will receive both PF_INET6 and PF_INET type
3223 * addresses on the socket.
3225 static int sctp_setsockopt_mappedv4(struct sock
*sk
, char __user
*optval
, unsigned int optlen
)
3228 struct sctp_sock
*sp
= sctp_sk(sk
);
3230 if (optlen
< sizeof(int))
3232 if (get_user(val
, (int __user
*)optval
))
3243 * 8.1.16. Get or Set the Maximum Fragmentation Size (SCTP_MAXSEG)
3244 * This option will get or set the maximum size to put in any outgoing
3245 * SCTP DATA chunk. If a message is larger than this size it will be
3246 * fragmented by SCTP into the specified size. Note that the underlying
3247 * SCTP implementation may fragment into smaller sized chunks when the
3248 * PMTU of the underlying association is smaller than the value set by
3249 * the user. The default value for this option is '0' which indicates
3250 * the user is NOT limiting fragmentation and only the PMTU will effect
3251 * SCTP's choice of DATA chunk size. Note also that values set larger
3252 * than the maximum size of an IP datagram will effectively let SCTP
3253 * control fragmentation (i.e. the same as setting this option to 0).
3255 * The following structure is used to access and modify this parameter:
3257 * struct sctp_assoc_value {
3258 * sctp_assoc_t assoc_id;
3259 * uint32_t assoc_value;
3262 * assoc_id: This parameter is ignored for one-to-one style sockets.
3263 * For one-to-many style sockets this parameter indicates which
3264 * association the user is performing an action upon. Note that if
3265 * this field's value is zero then the endpoints default value is
3266 * changed (effecting future associations only).
3267 * assoc_value: This parameter specifies the maximum size in bytes.
3269 static int sctp_setsockopt_maxseg(struct sock
*sk
, char __user
*optval
, unsigned int optlen
)
3271 struct sctp_sock
*sp
= sctp_sk(sk
);
3272 struct sctp_assoc_value params
;
3273 struct sctp_association
*asoc
;
3276 if (optlen
== sizeof(int)) {
3277 pr_warn_ratelimited(DEPRECATED
3279 "Use of int in maxseg socket option.\n"
3280 "Use struct sctp_assoc_value instead\n",
3281 current
->comm
, task_pid_nr(current
));
3282 if (copy_from_user(&val
, optval
, optlen
))
3284 params
.assoc_id
= SCTP_FUTURE_ASSOC
;
3285 } else if (optlen
== sizeof(struct sctp_assoc_value
)) {
3286 if (copy_from_user(¶ms
, optval
, optlen
))
3288 val
= params
.assoc_value
;
3293 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
3294 if (!asoc
&& params
.assoc_id
!= SCTP_FUTURE_ASSOC
&&
3295 sctp_style(sk
, UDP
))
3299 int min_len
, max_len
;
3300 __u16 datasize
= asoc
? sctp_datachk_len(&asoc
->stream
) :
3301 sizeof(struct sctp_data_chunk
);
3303 min_len
= sctp_min_frag_point(sp
, datasize
);
3304 max_len
= SCTP_MAX_CHUNK_LEN
- datasize
;
3306 if (val
< min_len
|| val
> max_len
)
3311 asoc
->user_frag
= val
;
3312 sctp_assoc_update_frag_point(asoc
);
3314 sp
->user_frag
= val
;
3322 * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR)
3324 * Requests that the peer mark the enclosed address as the association
3325 * primary. The enclosed address must be one of the association's
3326 * locally bound addresses. The following structure is used to make a
3327 * set primary request:
3329 static int sctp_setsockopt_peer_primary_addr(struct sock
*sk
, char __user
*optval
,
3330 unsigned int optlen
)
3332 struct sctp_sock
*sp
;
3333 struct sctp_association
*asoc
= NULL
;
3334 struct sctp_setpeerprim prim
;
3335 struct sctp_chunk
*chunk
;
3341 if (!sp
->ep
->asconf_enable
)
3344 if (optlen
!= sizeof(struct sctp_setpeerprim
))
3347 if (copy_from_user(&prim
, optval
, optlen
))
3350 asoc
= sctp_id2assoc(sk
, prim
.sspp_assoc_id
);
3354 if (!asoc
->peer
.asconf_capable
)
3357 if (asoc
->peer
.addip_disabled_mask
& SCTP_PARAM_SET_PRIMARY
)
3360 if (!sctp_state(asoc
, ESTABLISHED
))
3363 af
= sctp_get_af_specific(prim
.sspp_addr
.ss_family
);
3367 if (!af
->addr_valid((union sctp_addr
*)&prim
.sspp_addr
, sp
, NULL
))
3368 return -EADDRNOTAVAIL
;
3370 if (!sctp_assoc_lookup_laddr(asoc
, (union sctp_addr
*)&prim
.sspp_addr
))
3371 return -EADDRNOTAVAIL
;
3373 /* Allow security module to validate address. */
3374 err
= security_sctp_bind_connect(sk
, SCTP_SET_PEER_PRIMARY_ADDR
,
3375 (struct sockaddr
*)&prim
.sspp_addr
,
3380 /* Create an ASCONF chunk with SET_PRIMARY parameter */
3381 chunk
= sctp_make_asconf_set_prim(asoc
,
3382 (union sctp_addr
*)&prim
.sspp_addr
);
3386 err
= sctp_send_asconf(asoc
, chunk
);
3388 pr_debug("%s: we set peer primary addr primitively\n", __func__
);
3393 static int sctp_setsockopt_adaptation_layer(struct sock
*sk
, char __user
*optval
,
3394 unsigned int optlen
)
3396 struct sctp_setadaptation adaptation
;
3398 if (optlen
!= sizeof(struct sctp_setadaptation
))
3400 if (copy_from_user(&adaptation
, optval
, optlen
))
3403 sctp_sk(sk
)->adaptation_ind
= adaptation
.ssb_adaptation_ind
;
3409 * 7.1.29. Set or Get the default context (SCTP_CONTEXT)
3411 * The context field in the sctp_sndrcvinfo structure is normally only
3412 * used when a failed message is retrieved holding the value that was
3413 * sent down on the actual send call. This option allows the setting of
3414 * a default context on an association basis that will be received on
3415 * reading messages from the peer. This is especially helpful in the
3416 * one-2-many model for an application to keep some reference to an
3417 * internal state machine that is processing messages on the
3418 * association. Note that the setting of this value only effects
3419 * received messages from the peer and does not effect the value that is
3420 * saved with outbound messages.
3422 static int sctp_setsockopt_context(struct sock
*sk
, char __user
*optval
,
3423 unsigned int optlen
)
3425 struct sctp_sock
*sp
= sctp_sk(sk
);
3426 struct sctp_assoc_value params
;
3427 struct sctp_association
*asoc
;
3429 if (optlen
!= sizeof(struct sctp_assoc_value
))
3431 if (copy_from_user(¶ms
, optval
, optlen
))
3434 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
3435 if (!asoc
&& params
.assoc_id
> SCTP_ALL_ASSOC
&&
3436 sctp_style(sk
, UDP
))
3440 asoc
->default_rcv_context
= params
.assoc_value
;
3445 if (sctp_style(sk
, TCP
))
3446 params
.assoc_id
= SCTP_FUTURE_ASSOC
;
3448 if (params
.assoc_id
== SCTP_FUTURE_ASSOC
||
3449 params
.assoc_id
== SCTP_ALL_ASSOC
)
3450 sp
->default_rcv_context
= params
.assoc_value
;
3452 if (params
.assoc_id
== SCTP_CURRENT_ASSOC
||
3453 params
.assoc_id
== SCTP_ALL_ASSOC
)
3454 list_for_each_entry(asoc
, &sp
->ep
->asocs
, asocs
)
3455 asoc
->default_rcv_context
= params
.assoc_value
;
3461 * 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE)
3463 * This options will at a minimum specify if the implementation is doing
3464 * fragmented interleave. Fragmented interleave, for a one to many
3465 * socket, is when subsequent calls to receive a message may return
3466 * parts of messages from different associations. Some implementations
3467 * may allow you to turn this value on or off. If so, when turned off,
3468 * no fragment interleave will occur (which will cause a head of line
3469 * blocking amongst multiple associations sharing the same one to many
3470 * socket). When this option is turned on, then each receive call may
3471 * come from a different association (thus the user must receive data
3472 * with the extended calls (e.g. sctp_recvmsg) to keep track of which
3473 * association each receive belongs to.
3475 * This option takes a boolean value. A non-zero value indicates that
3476 * fragmented interleave is on. A value of zero indicates that
3477 * fragmented interleave is off.
3479 * Note that it is important that an implementation that allows this
3480 * option to be turned on, have it off by default. Otherwise an unaware
3481 * application using the one to many model may become confused and act
3484 static int sctp_setsockopt_fragment_interleave(struct sock
*sk
,
3485 char __user
*optval
,
3486 unsigned int optlen
)
3490 if (optlen
!= sizeof(int))
3492 if (get_user(val
, (int __user
*)optval
))
3495 sctp_sk(sk
)->frag_interleave
= !!val
;
3497 if (!sctp_sk(sk
)->frag_interleave
)
3498 sctp_sk(sk
)->ep
->intl_enable
= 0;
3504 * 8.1.21. Set or Get the SCTP Partial Delivery Point
3505 * (SCTP_PARTIAL_DELIVERY_POINT)
3507 * This option will set or get the SCTP partial delivery point. This
3508 * point is the size of a message where the partial delivery API will be
3509 * invoked to help free up rwnd space for the peer. Setting this to a
3510 * lower value will cause partial deliveries to happen more often. The
3511 * calls argument is an integer that sets or gets the partial delivery
3512 * point. Note also that the call will fail if the user attempts to set
3513 * this value larger than the socket receive buffer size.
3515 * Note that any single message having a length smaller than or equal to
3516 * the SCTP partial delivery point will be delivered in one single read
3517 * call as long as the user provided buffer is large enough to hold the
3520 static int sctp_setsockopt_partial_delivery_point(struct sock
*sk
,
3521 char __user
*optval
,
3522 unsigned int optlen
)
3526 if (optlen
!= sizeof(u32
))
3528 if (get_user(val
, (int __user
*)optval
))
3531 /* Note: We double the receive buffer from what the user sets
3532 * it to be, also initial rwnd is based on rcvbuf/2.
3534 if (val
> (sk
->sk_rcvbuf
>> 1))
3537 sctp_sk(sk
)->pd_point
= val
;
3539 return 0; /* is this the right error code? */
3543 * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST)
3545 * This option will allow a user to change the maximum burst of packets
3546 * that can be emitted by this association. Note that the default value
3547 * is 4, and some implementations may restrict this setting so that it
3548 * can only be lowered.
3550 * NOTE: This text doesn't seem right. Do this on a socket basis with
3551 * future associations inheriting the socket value.
3553 static int sctp_setsockopt_maxburst(struct sock
*sk
,
3554 char __user
*optval
,
3555 unsigned int optlen
)
3557 struct sctp_sock
*sp
= sctp_sk(sk
);
3558 struct sctp_assoc_value params
;
3559 struct sctp_association
*asoc
;
3561 if (optlen
== sizeof(int)) {
3562 pr_warn_ratelimited(DEPRECATED
3564 "Use of int in max_burst socket option deprecated.\n"
3565 "Use struct sctp_assoc_value instead\n",
3566 current
->comm
, task_pid_nr(current
));
3567 if (copy_from_user(¶ms
.assoc_value
, optval
, optlen
))
3569 params
.assoc_id
= SCTP_FUTURE_ASSOC
;
3570 } else if (optlen
== sizeof(struct sctp_assoc_value
)) {
3571 if (copy_from_user(¶ms
, optval
, optlen
))
3576 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
3577 if (!asoc
&& params
.assoc_id
> SCTP_ALL_ASSOC
&&
3578 sctp_style(sk
, UDP
))
3582 asoc
->max_burst
= params
.assoc_value
;
3587 if (sctp_style(sk
, TCP
))
3588 params
.assoc_id
= SCTP_FUTURE_ASSOC
;
3590 if (params
.assoc_id
== SCTP_FUTURE_ASSOC
||
3591 params
.assoc_id
== SCTP_ALL_ASSOC
)
3592 sp
->max_burst
= params
.assoc_value
;
3594 if (params
.assoc_id
== SCTP_CURRENT_ASSOC
||
3595 params
.assoc_id
== SCTP_ALL_ASSOC
)
3596 list_for_each_entry(asoc
, &sp
->ep
->asocs
, asocs
)
3597 asoc
->max_burst
= params
.assoc_value
;
3603 * 7.1.18. Add a chunk that must be authenticated (SCTP_AUTH_CHUNK)
3605 * This set option adds a chunk type that the user is requesting to be
3606 * received only in an authenticated way. Changes to the list of chunks
3607 * will only effect future associations on the socket.
3609 static int sctp_setsockopt_auth_chunk(struct sock
*sk
,
3610 char __user
*optval
,
3611 unsigned int optlen
)
3613 struct sctp_endpoint
*ep
= sctp_sk(sk
)->ep
;
3614 struct sctp_authchunk val
;
3616 if (!ep
->auth_enable
)
3619 if (optlen
!= sizeof(struct sctp_authchunk
))
3621 if (copy_from_user(&val
, optval
, optlen
))
3624 switch (val
.sauth_chunk
) {
3626 case SCTP_CID_INIT_ACK
:
3627 case SCTP_CID_SHUTDOWN_COMPLETE
:
3632 /* add this chunk id to the endpoint */
3633 return sctp_auth_ep_add_chunkid(ep
, val
.sauth_chunk
);
3637 * 7.1.19. Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT)
3639 * This option gets or sets the list of HMAC algorithms that the local
3640 * endpoint requires the peer to use.
3642 static int sctp_setsockopt_hmac_ident(struct sock
*sk
,
3643 char __user
*optval
,
3644 unsigned int optlen
)
3646 struct sctp_endpoint
*ep
= sctp_sk(sk
)->ep
;
3647 struct sctp_hmacalgo
*hmacs
;
3651 if (!ep
->auth_enable
)
3654 if (optlen
< sizeof(struct sctp_hmacalgo
))
3656 optlen
= min_t(unsigned int, optlen
, sizeof(struct sctp_hmacalgo
) +
3657 SCTP_AUTH_NUM_HMACS
* sizeof(u16
));
3659 hmacs
= memdup_user(optval
, optlen
);
3661 return PTR_ERR(hmacs
);
3663 idents
= hmacs
->shmac_num_idents
;
3664 if (idents
== 0 || idents
> SCTP_AUTH_NUM_HMACS
||
3665 (idents
* sizeof(u16
)) > (optlen
- sizeof(struct sctp_hmacalgo
))) {
3670 err
= sctp_auth_ep_set_hmacs(ep
, hmacs
);
3677 * 7.1.20. Set a shared key (SCTP_AUTH_KEY)
3679 * This option will set a shared secret key which is used to build an
3680 * association shared key.
3682 static int sctp_setsockopt_auth_key(struct sock
*sk
,
3683 char __user
*optval
,
3684 unsigned int optlen
)
3686 struct sctp_endpoint
*ep
= sctp_sk(sk
)->ep
;
3687 struct sctp_authkey
*authkey
;
3688 struct sctp_association
*asoc
;
3691 if (optlen
<= sizeof(struct sctp_authkey
))
3693 /* authkey->sca_keylength is u16, so optlen can't be bigger than
3696 optlen
= min_t(unsigned int, optlen
, USHRT_MAX
+ sizeof(*authkey
));
3698 authkey
= memdup_user(optval
, optlen
);
3699 if (IS_ERR(authkey
))
3700 return PTR_ERR(authkey
);
3702 if (authkey
->sca_keylength
> optlen
- sizeof(*authkey
))
3705 asoc
= sctp_id2assoc(sk
, authkey
->sca_assoc_id
);
3706 if (!asoc
&& authkey
->sca_assoc_id
> SCTP_ALL_ASSOC
&&
3707 sctp_style(sk
, UDP
))
3711 ret
= sctp_auth_set_key(ep
, asoc
, authkey
);
3715 if (sctp_style(sk
, TCP
))
3716 authkey
->sca_assoc_id
= SCTP_FUTURE_ASSOC
;
3718 if (authkey
->sca_assoc_id
== SCTP_FUTURE_ASSOC
||
3719 authkey
->sca_assoc_id
== SCTP_ALL_ASSOC
) {
3720 ret
= sctp_auth_set_key(ep
, asoc
, authkey
);
3727 if (authkey
->sca_assoc_id
== SCTP_CURRENT_ASSOC
||
3728 authkey
->sca_assoc_id
== SCTP_ALL_ASSOC
) {
3729 list_for_each_entry(asoc
, &ep
->asocs
, asocs
) {
3730 int res
= sctp_auth_set_key(ep
, asoc
, authkey
);
3743 * 7.1.21. Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY)
3745 * This option will get or set the active shared key to be used to build
3746 * the association shared key.
3748 static int sctp_setsockopt_active_key(struct sock
*sk
,
3749 char __user
*optval
,
3750 unsigned int optlen
)
3752 struct sctp_endpoint
*ep
= sctp_sk(sk
)->ep
;
3753 struct sctp_association
*asoc
;
3754 struct sctp_authkeyid val
;
3757 if (optlen
!= sizeof(struct sctp_authkeyid
))
3759 if (copy_from_user(&val
, optval
, optlen
))
3762 asoc
= sctp_id2assoc(sk
, val
.scact_assoc_id
);
3763 if (!asoc
&& val
.scact_assoc_id
> SCTP_ALL_ASSOC
&&
3764 sctp_style(sk
, UDP
))
3768 return sctp_auth_set_active_key(ep
, asoc
, val
.scact_keynumber
);
3770 if (sctp_style(sk
, TCP
))
3771 val
.scact_assoc_id
= SCTP_FUTURE_ASSOC
;
3773 if (val
.scact_assoc_id
== SCTP_FUTURE_ASSOC
||
3774 val
.scact_assoc_id
== SCTP_ALL_ASSOC
) {
3775 ret
= sctp_auth_set_active_key(ep
, asoc
, val
.scact_keynumber
);
3780 if (val
.scact_assoc_id
== SCTP_CURRENT_ASSOC
||
3781 val
.scact_assoc_id
== SCTP_ALL_ASSOC
) {
3782 list_for_each_entry(asoc
, &ep
->asocs
, asocs
) {
3783 int res
= sctp_auth_set_active_key(ep
, asoc
,
3784 val
.scact_keynumber
);
3795 * 7.1.22. Delete a shared key (SCTP_AUTH_DELETE_KEY)
3797 * This set option will delete a shared secret key from use.
3799 static int sctp_setsockopt_del_key(struct sock
*sk
,
3800 char __user
*optval
,
3801 unsigned int optlen
)
3803 struct sctp_endpoint
*ep
= sctp_sk(sk
)->ep
;
3804 struct sctp_association
*asoc
;
3805 struct sctp_authkeyid val
;
3808 if (optlen
!= sizeof(struct sctp_authkeyid
))
3810 if (copy_from_user(&val
, optval
, optlen
))
3813 asoc
= sctp_id2assoc(sk
, val
.scact_assoc_id
);
3814 if (!asoc
&& val
.scact_assoc_id
> SCTP_ALL_ASSOC
&&
3815 sctp_style(sk
, UDP
))
3819 return sctp_auth_del_key_id(ep
, asoc
, val
.scact_keynumber
);
3821 if (sctp_style(sk
, TCP
))
3822 val
.scact_assoc_id
= SCTP_FUTURE_ASSOC
;
3824 if (val
.scact_assoc_id
== SCTP_FUTURE_ASSOC
||
3825 val
.scact_assoc_id
== SCTP_ALL_ASSOC
) {
3826 ret
= sctp_auth_del_key_id(ep
, asoc
, val
.scact_keynumber
);
3831 if (val
.scact_assoc_id
== SCTP_CURRENT_ASSOC
||
3832 val
.scact_assoc_id
== SCTP_ALL_ASSOC
) {
3833 list_for_each_entry(asoc
, &ep
->asocs
, asocs
) {
3834 int res
= sctp_auth_del_key_id(ep
, asoc
,
3835 val
.scact_keynumber
);
3846 * 8.3.4 Deactivate a Shared Key (SCTP_AUTH_DEACTIVATE_KEY)
3848 * This set option will deactivate a shared secret key.
3850 static int sctp_setsockopt_deactivate_key(struct sock
*sk
, char __user
*optval
,
3851 unsigned int optlen
)
3853 struct sctp_endpoint
*ep
= sctp_sk(sk
)->ep
;
3854 struct sctp_association
*asoc
;
3855 struct sctp_authkeyid val
;
3858 if (optlen
!= sizeof(struct sctp_authkeyid
))
3860 if (copy_from_user(&val
, optval
, optlen
))
3863 asoc
= sctp_id2assoc(sk
, val
.scact_assoc_id
);
3864 if (!asoc
&& val
.scact_assoc_id
> SCTP_ALL_ASSOC
&&
3865 sctp_style(sk
, UDP
))
3869 return sctp_auth_deact_key_id(ep
, asoc
, val
.scact_keynumber
);
3871 if (sctp_style(sk
, TCP
))
3872 val
.scact_assoc_id
= SCTP_FUTURE_ASSOC
;
3874 if (val
.scact_assoc_id
== SCTP_FUTURE_ASSOC
||
3875 val
.scact_assoc_id
== SCTP_ALL_ASSOC
) {
3876 ret
= sctp_auth_deact_key_id(ep
, asoc
, val
.scact_keynumber
);
3881 if (val
.scact_assoc_id
== SCTP_CURRENT_ASSOC
||
3882 val
.scact_assoc_id
== SCTP_ALL_ASSOC
) {
3883 list_for_each_entry(asoc
, &ep
->asocs
, asocs
) {
3884 int res
= sctp_auth_deact_key_id(ep
, asoc
,
3885 val
.scact_keynumber
);
3896 * 8.1.23 SCTP_AUTO_ASCONF
3898 * This option will enable or disable the use of the automatic generation of
3899 * ASCONF chunks to add and delete addresses to an existing association. Note
3900 * that this option has two caveats namely: a) it only affects sockets that
3901 * are bound to all addresses available to the SCTP stack, and b) the system
3902 * administrator may have an overriding control that turns the ASCONF feature
3903 * off no matter what setting the socket option may have.
3904 * This option expects an integer boolean flag, where a non-zero value turns on
3905 * the option, and a zero value turns off the option.
3906 * Note. In this implementation, socket operation overrides default parameter
3907 * being set by sysctl as well as FreeBSD implementation
3909 static int sctp_setsockopt_auto_asconf(struct sock
*sk
, char __user
*optval
,
3910 unsigned int optlen
)
3913 struct sctp_sock
*sp
= sctp_sk(sk
);
3915 if (optlen
< sizeof(int))
3917 if (get_user(val
, (int __user
*)optval
))
3919 if (!sctp_is_ep_boundall(sk
) && val
)
3921 if ((val
&& sp
->do_auto_asconf
) || (!val
&& !sp
->do_auto_asconf
))
3924 spin_lock_bh(&sock_net(sk
)->sctp
.addr_wq_lock
);
3925 if (val
== 0 && sp
->do_auto_asconf
) {
3926 list_del(&sp
->auto_asconf_list
);
3927 sp
->do_auto_asconf
= 0;
3928 } else if (val
&& !sp
->do_auto_asconf
) {
3929 list_add_tail(&sp
->auto_asconf_list
,
3930 &sock_net(sk
)->sctp
.auto_asconf_splist
);
3931 sp
->do_auto_asconf
= 1;
3933 spin_unlock_bh(&sock_net(sk
)->sctp
.addr_wq_lock
);
3938 * SCTP_PEER_ADDR_THLDS
3940 * This option allows us to alter the partially failed threshold for one or all
3941 * transports in an association. See Section 6.1 of:
3942 * http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txt
3944 static int sctp_setsockopt_paddr_thresholds(struct sock
*sk
,
3945 char __user
*optval
,
3946 unsigned int optlen
)
3948 struct sctp_paddrthlds val
;
3949 struct sctp_transport
*trans
;
3950 struct sctp_association
*asoc
;
3952 if (optlen
< sizeof(struct sctp_paddrthlds
))
3954 if (copy_from_user(&val
, (struct sctp_paddrthlds __user
*)optval
,
3955 sizeof(struct sctp_paddrthlds
)))
3958 if (!sctp_is_any(sk
, (const union sctp_addr
*)&val
.spt_address
)) {
3959 trans
= sctp_addr_id2transport(sk
, &val
.spt_address
,
3964 if (val
.spt_pathmaxrxt
)
3965 trans
->pathmaxrxt
= val
.spt_pathmaxrxt
;
3966 trans
->pf_retrans
= val
.spt_pathpfthld
;
3971 asoc
= sctp_id2assoc(sk
, val
.spt_assoc_id
);
3972 if (!asoc
&& val
.spt_assoc_id
!= SCTP_FUTURE_ASSOC
&&
3973 sctp_style(sk
, UDP
))
3977 list_for_each_entry(trans
, &asoc
->peer
.transport_addr_list
,
3979 if (val
.spt_pathmaxrxt
)
3980 trans
->pathmaxrxt
= val
.spt_pathmaxrxt
;
3981 trans
->pf_retrans
= val
.spt_pathpfthld
;
3984 if (val
.spt_pathmaxrxt
)
3985 asoc
->pathmaxrxt
= val
.spt_pathmaxrxt
;
3986 asoc
->pf_retrans
= val
.spt_pathpfthld
;
3988 struct sctp_sock
*sp
= sctp_sk(sk
);
3990 if (val
.spt_pathmaxrxt
)
3991 sp
->pathmaxrxt
= val
.spt_pathmaxrxt
;
3992 sp
->pf_retrans
= val
.spt_pathpfthld
;
3998 static int sctp_setsockopt_recvrcvinfo(struct sock
*sk
,
3999 char __user
*optval
,
4000 unsigned int optlen
)
4004 if (optlen
< sizeof(int))
4006 if (get_user(val
, (int __user
*) optval
))
4009 sctp_sk(sk
)->recvrcvinfo
= (val
== 0) ? 0 : 1;
4014 static int sctp_setsockopt_recvnxtinfo(struct sock
*sk
,
4015 char __user
*optval
,
4016 unsigned int optlen
)
4020 if (optlen
< sizeof(int))
4022 if (get_user(val
, (int __user
*) optval
))
4025 sctp_sk(sk
)->recvnxtinfo
= (val
== 0) ? 0 : 1;
4030 static int sctp_setsockopt_pr_supported(struct sock
*sk
,
4031 char __user
*optval
,
4032 unsigned int optlen
)
4034 struct sctp_assoc_value params
;
4035 struct sctp_association
*asoc
;
4037 if (optlen
!= sizeof(params
))
4040 if (copy_from_user(¶ms
, optval
, optlen
))
4043 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
4044 if (!asoc
&& params
.assoc_id
!= SCTP_FUTURE_ASSOC
&&
4045 sctp_style(sk
, UDP
))
4048 sctp_sk(sk
)->ep
->prsctp_enable
= !!params
.assoc_value
;
4053 static int sctp_setsockopt_default_prinfo(struct sock
*sk
,
4054 char __user
*optval
,
4055 unsigned int optlen
)
4057 struct sctp_sock
*sp
= sctp_sk(sk
);
4058 struct sctp_default_prinfo info
;
4059 struct sctp_association
*asoc
;
4060 int retval
= -EINVAL
;
4062 if (optlen
!= sizeof(info
))
4065 if (copy_from_user(&info
, optval
, sizeof(info
))) {
4070 if (info
.pr_policy
& ~SCTP_PR_SCTP_MASK
)
4073 if (info
.pr_policy
== SCTP_PR_SCTP_NONE
)
4076 asoc
= sctp_id2assoc(sk
, info
.pr_assoc_id
);
4077 if (!asoc
&& info
.pr_assoc_id
> SCTP_ALL_ASSOC
&&
4078 sctp_style(sk
, UDP
))
4084 SCTP_PR_SET_POLICY(asoc
->default_flags
, info
.pr_policy
);
4085 asoc
->default_timetolive
= info
.pr_value
;
4089 if (sctp_style(sk
, TCP
))
4090 info
.pr_assoc_id
= SCTP_FUTURE_ASSOC
;
4092 if (info
.pr_assoc_id
== SCTP_FUTURE_ASSOC
||
4093 info
.pr_assoc_id
== SCTP_ALL_ASSOC
) {
4094 SCTP_PR_SET_POLICY(sp
->default_flags
, info
.pr_policy
);
4095 sp
->default_timetolive
= info
.pr_value
;
4098 if (info
.pr_assoc_id
== SCTP_CURRENT_ASSOC
||
4099 info
.pr_assoc_id
== SCTP_ALL_ASSOC
) {
4100 list_for_each_entry(asoc
, &sp
->ep
->asocs
, asocs
) {
4101 SCTP_PR_SET_POLICY(asoc
->default_flags
, info
.pr_policy
);
4102 asoc
->default_timetolive
= info
.pr_value
;
4110 static int sctp_setsockopt_reconfig_supported(struct sock
*sk
,
4111 char __user
*optval
,
4112 unsigned int optlen
)
4114 struct sctp_assoc_value params
;
4115 struct sctp_association
*asoc
;
4116 int retval
= -EINVAL
;
4118 if (optlen
!= sizeof(params
))
4121 if (copy_from_user(¶ms
, optval
, optlen
)) {
4126 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
4127 if (!asoc
&& params
.assoc_id
!= SCTP_FUTURE_ASSOC
&&
4128 sctp_style(sk
, UDP
))
4131 sctp_sk(sk
)->ep
->reconf_enable
= !!params
.assoc_value
;
4139 static int sctp_setsockopt_enable_strreset(struct sock
*sk
,
4140 char __user
*optval
,
4141 unsigned int optlen
)
4143 struct sctp_endpoint
*ep
= sctp_sk(sk
)->ep
;
4144 struct sctp_assoc_value params
;
4145 struct sctp_association
*asoc
;
4146 int retval
= -EINVAL
;
4148 if (optlen
!= sizeof(params
))
4151 if (copy_from_user(¶ms
, optval
, optlen
)) {
4156 if (params
.assoc_value
& (~SCTP_ENABLE_STRRESET_MASK
))
4159 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
4160 if (!asoc
&& params
.assoc_id
> SCTP_ALL_ASSOC
&&
4161 sctp_style(sk
, UDP
))
4167 asoc
->strreset_enable
= params
.assoc_value
;
4171 if (sctp_style(sk
, TCP
))
4172 params
.assoc_id
= SCTP_FUTURE_ASSOC
;
4174 if (params
.assoc_id
== SCTP_FUTURE_ASSOC
||
4175 params
.assoc_id
== SCTP_ALL_ASSOC
)
4176 ep
->strreset_enable
= params
.assoc_value
;
4178 if (params
.assoc_id
== SCTP_CURRENT_ASSOC
||
4179 params
.assoc_id
== SCTP_ALL_ASSOC
)
4180 list_for_each_entry(asoc
, &ep
->asocs
, asocs
)
4181 asoc
->strreset_enable
= params
.assoc_value
;
4187 static int sctp_setsockopt_reset_streams(struct sock
*sk
,
4188 char __user
*optval
,
4189 unsigned int optlen
)
4191 struct sctp_reset_streams
*params
;
4192 struct sctp_association
*asoc
;
4193 int retval
= -EINVAL
;
4195 if (optlen
< sizeof(*params
))
4197 /* srs_number_streams is u16, so optlen can't be bigger than this. */
4198 optlen
= min_t(unsigned int, optlen
, USHRT_MAX
+
4199 sizeof(__u16
) * sizeof(*params
));
4201 params
= memdup_user(optval
, optlen
);
4203 return PTR_ERR(params
);
4205 if (params
->srs_number_streams
* sizeof(__u16
) >
4206 optlen
- sizeof(*params
))
4209 asoc
= sctp_id2assoc(sk
, params
->srs_assoc_id
);
4213 retval
= sctp_send_reset_streams(asoc
, params
);
4220 static int sctp_setsockopt_reset_assoc(struct sock
*sk
,
4221 char __user
*optval
,
4222 unsigned int optlen
)
4224 struct sctp_association
*asoc
;
4225 sctp_assoc_t associd
;
4226 int retval
= -EINVAL
;
4228 if (optlen
!= sizeof(associd
))
4231 if (copy_from_user(&associd
, optval
, optlen
)) {
4236 asoc
= sctp_id2assoc(sk
, associd
);
4240 retval
= sctp_send_reset_assoc(asoc
);
4246 static int sctp_setsockopt_add_streams(struct sock
*sk
,
4247 char __user
*optval
,
4248 unsigned int optlen
)
4250 struct sctp_association
*asoc
;
4251 struct sctp_add_streams params
;
4252 int retval
= -EINVAL
;
4254 if (optlen
!= sizeof(params
))
4257 if (copy_from_user(¶ms
, optval
, optlen
)) {
4262 asoc
= sctp_id2assoc(sk
, params
.sas_assoc_id
);
4266 retval
= sctp_send_add_streams(asoc
, ¶ms
);
4272 static int sctp_setsockopt_scheduler(struct sock
*sk
,
4273 char __user
*optval
,
4274 unsigned int optlen
)
4276 struct sctp_sock
*sp
= sctp_sk(sk
);
4277 struct sctp_association
*asoc
;
4278 struct sctp_assoc_value params
;
4281 if (optlen
< sizeof(params
))
4284 optlen
= sizeof(params
);
4285 if (copy_from_user(¶ms
, optval
, optlen
))
4288 if (params
.assoc_value
> SCTP_SS_MAX
)
4291 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
4292 if (!asoc
&& params
.assoc_id
> SCTP_ALL_ASSOC
&&
4293 sctp_style(sk
, UDP
))
4297 return sctp_sched_set_sched(asoc
, params
.assoc_value
);
4299 if (sctp_style(sk
, TCP
))
4300 params
.assoc_id
= SCTP_FUTURE_ASSOC
;
4302 if (params
.assoc_id
== SCTP_FUTURE_ASSOC
||
4303 params
.assoc_id
== SCTP_ALL_ASSOC
)
4304 sp
->default_ss
= params
.assoc_value
;
4306 if (params
.assoc_id
== SCTP_CURRENT_ASSOC
||
4307 params
.assoc_id
== SCTP_ALL_ASSOC
) {
4308 list_for_each_entry(asoc
, &sp
->ep
->asocs
, asocs
) {
4309 int ret
= sctp_sched_set_sched(asoc
,
4310 params
.assoc_value
);
4320 static int sctp_setsockopt_scheduler_value(struct sock
*sk
,
4321 char __user
*optval
,
4322 unsigned int optlen
)
4324 struct sctp_stream_value params
;
4325 struct sctp_association
*asoc
;
4326 int retval
= -EINVAL
;
4328 if (optlen
< sizeof(params
))
4331 optlen
= sizeof(params
);
4332 if (copy_from_user(¶ms
, optval
, optlen
)) {
4337 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
4338 if (!asoc
&& params
.assoc_id
!= SCTP_CURRENT_ASSOC
&&
4339 sctp_style(sk
, UDP
))
4343 retval
= sctp_sched_set_value(asoc
, params
.stream_id
,
4344 params
.stream_value
, GFP_KERNEL
);
4350 list_for_each_entry(asoc
, &sctp_sk(sk
)->ep
->asocs
, asocs
) {
4351 int ret
= sctp_sched_set_value(asoc
, params
.stream_id
,
4352 params
.stream_value
, GFP_KERNEL
);
4353 if (ret
&& !retval
) /* try to return the 1st error. */
4361 static int sctp_setsockopt_interleaving_supported(struct sock
*sk
,
4362 char __user
*optval
,
4363 unsigned int optlen
)
4365 struct sctp_sock
*sp
= sctp_sk(sk
);
4366 struct sctp_assoc_value params
;
4367 struct sctp_association
*asoc
;
4368 int retval
= -EINVAL
;
4370 if (optlen
< sizeof(params
))
4373 optlen
= sizeof(params
);
4374 if (copy_from_user(¶ms
, optval
, optlen
)) {
4379 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
4380 if (!asoc
&& params
.assoc_id
!= SCTP_FUTURE_ASSOC
&&
4381 sctp_style(sk
, UDP
))
4384 if (!sock_net(sk
)->sctp
.intl_enable
|| !sp
->frag_interleave
) {
4389 sp
->ep
->intl_enable
= !!params
.assoc_value
;
4397 static int sctp_setsockopt_reuse_port(struct sock
*sk
, char __user
*optval
,
4398 unsigned int optlen
)
4402 if (!sctp_style(sk
, TCP
))
4405 if (sctp_sk(sk
)->ep
->base
.bind_addr
.port
)
4408 if (optlen
< sizeof(int))
4411 if (get_user(val
, (int __user
*)optval
))
4414 sctp_sk(sk
)->reuse
= !!val
;
4419 static int sctp_assoc_ulpevent_type_set(struct sctp_event
*param
,
4420 struct sctp_association
*asoc
)
4422 struct sctp_ulpevent
*event
;
4424 sctp_ulpevent_type_set(&asoc
->subscribe
, param
->se_type
, param
->se_on
);
4426 if (param
->se_type
== SCTP_SENDER_DRY_EVENT
&& param
->se_on
) {
4427 if (sctp_outq_is_empty(&asoc
->outqueue
)) {
4428 event
= sctp_ulpevent_make_sender_dry_event(asoc
,
4429 GFP_USER
| __GFP_NOWARN
);
4433 asoc
->stream
.si
->enqueue_event(&asoc
->ulpq
, event
);
4440 static int sctp_setsockopt_event(struct sock
*sk
, char __user
*optval
,
4441 unsigned int optlen
)
4443 struct sctp_sock
*sp
= sctp_sk(sk
);
4444 struct sctp_association
*asoc
;
4445 struct sctp_event param
;
4448 if (optlen
< sizeof(param
))
4451 optlen
= sizeof(param
);
4452 if (copy_from_user(¶m
, optval
, optlen
))
4455 if (param
.se_type
< SCTP_SN_TYPE_BASE
||
4456 param
.se_type
> SCTP_SN_TYPE_MAX
)
4459 asoc
= sctp_id2assoc(sk
, param
.se_assoc_id
);
4460 if (!asoc
&& param
.se_assoc_id
> SCTP_ALL_ASSOC
&&
4461 sctp_style(sk
, UDP
))
4465 return sctp_assoc_ulpevent_type_set(¶m
, asoc
);
4467 if (sctp_style(sk
, TCP
))
4468 param
.se_assoc_id
= SCTP_FUTURE_ASSOC
;
4470 if (param
.se_assoc_id
== SCTP_FUTURE_ASSOC
||
4471 param
.se_assoc_id
== SCTP_ALL_ASSOC
)
4472 sctp_ulpevent_type_set(&sp
->subscribe
,
4473 param
.se_type
, param
.se_on
);
4475 if (param
.se_assoc_id
== SCTP_CURRENT_ASSOC
||
4476 param
.se_assoc_id
== SCTP_ALL_ASSOC
) {
4477 list_for_each_entry(asoc
, &sp
->ep
->asocs
, asocs
) {
4478 int ret
= sctp_assoc_ulpevent_type_set(¶m
, asoc
);
4488 static int sctp_setsockopt_asconf_supported(struct sock
*sk
,
4489 char __user
*optval
,
4490 unsigned int optlen
)
4492 struct sctp_assoc_value params
;
4493 struct sctp_association
*asoc
;
4494 struct sctp_endpoint
*ep
;
4495 int retval
= -EINVAL
;
4497 if (optlen
!= sizeof(params
))
4500 if (copy_from_user(¶ms
, optval
, optlen
)) {
4505 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
4506 if (!asoc
&& params
.assoc_id
!= SCTP_FUTURE_ASSOC
&&
4507 sctp_style(sk
, UDP
))
4510 ep
= sctp_sk(sk
)->ep
;
4511 ep
->asconf_enable
= !!params
.assoc_value
;
4513 if (ep
->asconf_enable
&& ep
->auth_enable
) {
4514 sctp_auth_ep_add_chunkid(ep
, SCTP_CID_ASCONF
);
4515 sctp_auth_ep_add_chunkid(ep
, SCTP_CID_ASCONF_ACK
);
4524 static int sctp_setsockopt_auth_supported(struct sock
*sk
,
4525 char __user
*optval
,
4526 unsigned int optlen
)
4528 struct sctp_assoc_value params
;
4529 struct sctp_association
*asoc
;
4530 struct sctp_endpoint
*ep
;
4531 int retval
= -EINVAL
;
4533 if (optlen
!= sizeof(params
))
4536 if (copy_from_user(¶ms
, optval
, optlen
)) {
4541 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
4542 if (!asoc
&& params
.assoc_id
!= SCTP_FUTURE_ASSOC
&&
4543 sctp_style(sk
, UDP
))
4546 ep
= sctp_sk(sk
)->ep
;
4547 if (params
.assoc_value
) {
4548 retval
= sctp_auth_init(ep
, GFP_KERNEL
);
4551 if (ep
->asconf_enable
) {
4552 sctp_auth_ep_add_chunkid(ep
, SCTP_CID_ASCONF
);
4553 sctp_auth_ep_add_chunkid(ep
, SCTP_CID_ASCONF_ACK
);
4557 ep
->auth_enable
= !!params
.assoc_value
;
4564 static int sctp_setsockopt_ecn_supported(struct sock
*sk
,
4565 char __user
*optval
,
4566 unsigned int optlen
)
4568 struct sctp_assoc_value params
;
4569 struct sctp_association
*asoc
;
4570 int retval
= -EINVAL
;
4572 if (optlen
!= sizeof(params
))
4575 if (copy_from_user(¶ms
, optval
, optlen
)) {
4580 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
4581 if (!asoc
&& params
.assoc_id
!= SCTP_FUTURE_ASSOC
&&
4582 sctp_style(sk
, UDP
))
4585 sctp_sk(sk
)->ep
->ecn_enable
= !!params
.assoc_value
;
4592 /* API 6.2 setsockopt(), getsockopt()
4594 * Applications use setsockopt() and getsockopt() to set or retrieve
4595 * socket options. Socket options are used to change the default
4596 * behavior of sockets calls. They are described in Section 7.
4600 * ret = getsockopt(int sd, int level, int optname, void __user *optval,
4601 * int __user *optlen);
4602 * ret = setsockopt(int sd, int level, int optname, const void __user *optval,
4605 * sd - the socket descript.
4606 * level - set to IPPROTO_SCTP for all SCTP options.
4607 * optname - the option name.
4608 * optval - the buffer to store the value of the option.
4609 * optlen - the size of the buffer.
4611 static int sctp_setsockopt(struct sock
*sk
, int level
, int optname
,
4612 char __user
*optval
, unsigned int optlen
)
4616 pr_debug("%s: sk:%p, optname:%d\n", __func__
, sk
, optname
);
4618 /* I can hardly begin to describe how wrong this is. This is
4619 * so broken as to be worse than useless. The API draft
4620 * REALLY is NOT helpful here... I am not convinced that the
4621 * semantics of setsockopt() with a level OTHER THAN SOL_SCTP
4622 * are at all well-founded.
4624 if (level
!= SOL_SCTP
) {
4625 struct sctp_af
*af
= sctp_sk(sk
)->pf
->af
;
4626 retval
= af
->setsockopt(sk
, level
, optname
, optval
, optlen
);
4633 case SCTP_SOCKOPT_BINDX_ADD
:
4634 /* 'optlen' is the size of the addresses buffer. */
4635 retval
= sctp_setsockopt_bindx(sk
, (struct sockaddr __user
*)optval
,
4636 optlen
, SCTP_BINDX_ADD_ADDR
);
4639 case SCTP_SOCKOPT_BINDX_REM
:
4640 /* 'optlen' is the size of the addresses buffer. */
4641 retval
= sctp_setsockopt_bindx(sk
, (struct sockaddr __user
*)optval
,
4642 optlen
, SCTP_BINDX_REM_ADDR
);
4645 case SCTP_SOCKOPT_CONNECTX_OLD
:
4646 /* 'optlen' is the size of the addresses buffer. */
4647 retval
= sctp_setsockopt_connectx_old(sk
,
4648 (struct sockaddr __user
*)optval
,
4652 case SCTP_SOCKOPT_CONNECTX
:
4653 /* 'optlen' is the size of the addresses buffer. */
4654 retval
= sctp_setsockopt_connectx(sk
,
4655 (struct sockaddr __user
*)optval
,
4659 case SCTP_DISABLE_FRAGMENTS
:
4660 retval
= sctp_setsockopt_disable_fragments(sk
, optval
, optlen
);
4664 retval
= sctp_setsockopt_events(sk
, optval
, optlen
);
4667 case SCTP_AUTOCLOSE
:
4668 retval
= sctp_setsockopt_autoclose(sk
, optval
, optlen
);
4671 case SCTP_PEER_ADDR_PARAMS
:
4672 retval
= sctp_setsockopt_peer_addr_params(sk
, optval
, optlen
);
4675 case SCTP_DELAYED_SACK
:
4676 retval
= sctp_setsockopt_delayed_ack(sk
, optval
, optlen
);
4678 case SCTP_PARTIAL_DELIVERY_POINT
:
4679 retval
= sctp_setsockopt_partial_delivery_point(sk
, optval
, optlen
);
4683 retval
= sctp_setsockopt_initmsg(sk
, optval
, optlen
);
4685 case SCTP_DEFAULT_SEND_PARAM
:
4686 retval
= sctp_setsockopt_default_send_param(sk
, optval
,
4689 case SCTP_DEFAULT_SNDINFO
:
4690 retval
= sctp_setsockopt_default_sndinfo(sk
, optval
, optlen
);
4692 case SCTP_PRIMARY_ADDR
:
4693 retval
= sctp_setsockopt_primary_addr(sk
, optval
, optlen
);
4695 case SCTP_SET_PEER_PRIMARY_ADDR
:
4696 retval
= sctp_setsockopt_peer_primary_addr(sk
, optval
, optlen
);
4699 retval
= sctp_setsockopt_nodelay(sk
, optval
, optlen
);
4702 retval
= sctp_setsockopt_rtoinfo(sk
, optval
, optlen
);
4704 case SCTP_ASSOCINFO
:
4705 retval
= sctp_setsockopt_associnfo(sk
, optval
, optlen
);
4707 case SCTP_I_WANT_MAPPED_V4_ADDR
:
4708 retval
= sctp_setsockopt_mappedv4(sk
, optval
, optlen
);
4711 retval
= sctp_setsockopt_maxseg(sk
, optval
, optlen
);
4713 case SCTP_ADAPTATION_LAYER
:
4714 retval
= sctp_setsockopt_adaptation_layer(sk
, optval
, optlen
);
4717 retval
= sctp_setsockopt_context(sk
, optval
, optlen
);
4719 case SCTP_FRAGMENT_INTERLEAVE
:
4720 retval
= sctp_setsockopt_fragment_interleave(sk
, optval
, optlen
);
4722 case SCTP_MAX_BURST
:
4723 retval
= sctp_setsockopt_maxburst(sk
, optval
, optlen
);
4725 case SCTP_AUTH_CHUNK
:
4726 retval
= sctp_setsockopt_auth_chunk(sk
, optval
, optlen
);
4728 case SCTP_HMAC_IDENT
:
4729 retval
= sctp_setsockopt_hmac_ident(sk
, optval
, optlen
);
4732 retval
= sctp_setsockopt_auth_key(sk
, optval
, optlen
);
4734 case SCTP_AUTH_ACTIVE_KEY
:
4735 retval
= sctp_setsockopt_active_key(sk
, optval
, optlen
);
4737 case SCTP_AUTH_DELETE_KEY
:
4738 retval
= sctp_setsockopt_del_key(sk
, optval
, optlen
);
4740 case SCTP_AUTH_DEACTIVATE_KEY
:
4741 retval
= sctp_setsockopt_deactivate_key(sk
, optval
, optlen
);
4743 case SCTP_AUTO_ASCONF
:
4744 retval
= sctp_setsockopt_auto_asconf(sk
, optval
, optlen
);
4746 case SCTP_PEER_ADDR_THLDS
:
4747 retval
= sctp_setsockopt_paddr_thresholds(sk
, optval
, optlen
);
4749 case SCTP_RECVRCVINFO
:
4750 retval
= sctp_setsockopt_recvrcvinfo(sk
, optval
, optlen
);
4752 case SCTP_RECVNXTINFO
:
4753 retval
= sctp_setsockopt_recvnxtinfo(sk
, optval
, optlen
);
4755 case SCTP_PR_SUPPORTED
:
4756 retval
= sctp_setsockopt_pr_supported(sk
, optval
, optlen
);
4758 case SCTP_DEFAULT_PRINFO
:
4759 retval
= sctp_setsockopt_default_prinfo(sk
, optval
, optlen
);
4761 case SCTP_RECONFIG_SUPPORTED
:
4762 retval
= sctp_setsockopt_reconfig_supported(sk
, optval
, optlen
);
4764 case SCTP_ENABLE_STREAM_RESET
:
4765 retval
= sctp_setsockopt_enable_strreset(sk
, optval
, optlen
);
4767 case SCTP_RESET_STREAMS
:
4768 retval
= sctp_setsockopt_reset_streams(sk
, optval
, optlen
);
4770 case SCTP_RESET_ASSOC
:
4771 retval
= sctp_setsockopt_reset_assoc(sk
, optval
, optlen
);
4773 case SCTP_ADD_STREAMS
:
4774 retval
= sctp_setsockopt_add_streams(sk
, optval
, optlen
);
4776 case SCTP_STREAM_SCHEDULER
:
4777 retval
= sctp_setsockopt_scheduler(sk
, optval
, optlen
);
4779 case SCTP_STREAM_SCHEDULER_VALUE
:
4780 retval
= sctp_setsockopt_scheduler_value(sk
, optval
, optlen
);
4782 case SCTP_INTERLEAVING_SUPPORTED
:
4783 retval
= sctp_setsockopt_interleaving_supported(sk
, optval
,
4786 case SCTP_REUSE_PORT
:
4787 retval
= sctp_setsockopt_reuse_port(sk
, optval
, optlen
);
4790 retval
= sctp_setsockopt_event(sk
, optval
, optlen
);
4792 case SCTP_ASCONF_SUPPORTED
:
4793 retval
= sctp_setsockopt_asconf_supported(sk
, optval
, optlen
);
4795 case SCTP_AUTH_SUPPORTED
:
4796 retval
= sctp_setsockopt_auth_supported(sk
, optval
, optlen
);
4798 case SCTP_ECN_SUPPORTED
:
4799 retval
= sctp_setsockopt_ecn_supported(sk
, optval
, optlen
);
4802 retval
= -ENOPROTOOPT
;
4812 /* API 3.1.6 connect() - UDP Style Syntax
4814 * An application may use the connect() call in the UDP model to initiate an
4815 * association without sending data.
4819 * ret = connect(int sd, const struct sockaddr *nam, socklen_t len);
4821 * sd: the socket descriptor to have a new association added to.
4823 * nam: the address structure (either struct sockaddr_in or struct
4824 * sockaddr_in6 defined in RFC2553 [7]).
4826 * len: the size of the address.
4828 static int sctp_connect(struct sock
*sk
, struct sockaddr
*addr
,
4829 int addr_len
, int flags
)
4835 pr_debug("%s: sk:%p, sockaddr:%p, addr_len:%d\n", __func__
, sk
,
4838 /* Validate addr_len before calling common connect/connectx routine. */
4839 af
= sctp_get_af_specific(addr
->sa_family
);
4840 if (af
&& addr_len
>= af
->sockaddr_len
)
4841 err
= __sctp_connect(sk
, addr
, af
->sockaddr_len
, flags
, NULL
);
4847 int sctp_inet_connect(struct socket
*sock
, struct sockaddr
*uaddr
,
4848 int addr_len
, int flags
)
4850 if (addr_len
< sizeof(uaddr
->sa_family
))
4853 if (uaddr
->sa_family
== AF_UNSPEC
)
4856 return sctp_connect(sock
->sk
, uaddr
, addr_len
, flags
);
4859 /* FIXME: Write comments. */
4860 static int sctp_disconnect(struct sock
*sk
, int flags
)
4862 return -EOPNOTSUPP
; /* STUB */
4865 /* 4.1.4 accept() - TCP Style Syntax
4867 * Applications use accept() call to remove an established SCTP
4868 * association from the accept queue of the endpoint. A new socket
4869 * descriptor will be returned from accept() to represent the newly
4870 * formed association.
4872 static struct sock
*sctp_accept(struct sock
*sk
, int flags
, int *err
, bool kern
)
4874 struct sctp_sock
*sp
;
4875 struct sctp_endpoint
*ep
;
4876 struct sock
*newsk
= NULL
;
4877 struct sctp_association
*asoc
;
4886 if (!sctp_style(sk
, TCP
)) {
4887 error
= -EOPNOTSUPP
;
4891 if (!sctp_sstate(sk
, LISTENING
)) {
4896 timeo
= sock_rcvtimeo(sk
, flags
& O_NONBLOCK
);
4898 error
= sctp_wait_for_accept(sk
, timeo
);
4902 /* We treat the list of associations on the endpoint as the accept
4903 * queue and pick the first association on the list.
4905 asoc
= list_entry(ep
->asocs
.next
, struct sctp_association
, asocs
);
4907 newsk
= sp
->pf
->create_accept_sk(sk
, asoc
, kern
);
4913 /* Populate the fields of the newsk from the oldsk and migrate the
4914 * asoc to the newsk.
4916 error
= sctp_sock_migrate(sk
, newsk
, asoc
, SCTP_SOCKET_TCP
);
4918 sk_common_release(newsk
);
4928 /* The SCTP ioctl handler. */
4929 static int sctp_ioctl(struct sock
*sk
, int cmd
, unsigned long arg
)
4936 * SEQPACKET-style sockets in LISTENING state are valid, for
4937 * SCTP, so only discard TCP-style sockets in LISTENING state.
4939 if (sctp_style(sk
, TCP
) && sctp_sstate(sk
, LISTENING
))
4944 struct sk_buff
*skb
;
4945 unsigned int amount
= 0;
4947 skb
= skb_peek(&sk
->sk_receive_queue
);
4950 * We will only return the amount of this packet since
4951 * that is all that will be read.
4955 rc
= put_user(amount
, (int __user
*)arg
);
4967 /* This is the function which gets called during socket creation to
4968 * initialized the SCTP-specific portion of the sock.
4969 * The sock structure should already be zero-filled memory.
4971 static int sctp_init_sock(struct sock
*sk
)
4973 struct net
*net
= sock_net(sk
);
4974 struct sctp_sock
*sp
;
4976 pr_debug("%s: sk:%p\n", __func__
, sk
);
4980 /* Initialize the SCTP per socket area. */
4981 switch (sk
->sk_type
) {
4982 case SOCK_SEQPACKET
:
4983 sp
->type
= SCTP_SOCKET_UDP
;
4986 sp
->type
= SCTP_SOCKET_TCP
;
4989 return -ESOCKTNOSUPPORT
;
4992 sk
->sk_gso_type
= SKB_GSO_SCTP
;
4994 /* Initialize default send parameters. These parameters can be
4995 * modified with the SCTP_DEFAULT_SEND_PARAM socket option.
4997 sp
->default_stream
= 0;
4998 sp
->default_ppid
= 0;
4999 sp
->default_flags
= 0;
5000 sp
->default_context
= 0;
5001 sp
->default_timetolive
= 0;
5003 sp
->default_rcv_context
= 0;
5004 sp
->max_burst
= net
->sctp
.max_burst
;
5006 sp
->sctp_hmac_alg
= net
->sctp
.sctp_hmac_alg
;
5008 /* Initialize default setup parameters. These parameters
5009 * can be modified with the SCTP_INITMSG socket option or
5010 * overridden by the SCTP_INIT CMSG.
5012 sp
->initmsg
.sinit_num_ostreams
= sctp_max_outstreams
;
5013 sp
->initmsg
.sinit_max_instreams
= sctp_max_instreams
;
5014 sp
->initmsg
.sinit_max_attempts
= net
->sctp
.max_retrans_init
;
5015 sp
->initmsg
.sinit_max_init_timeo
= net
->sctp
.rto_max
;
5017 /* Initialize default RTO related parameters. These parameters can
5018 * be modified for with the SCTP_RTOINFO socket option.
5020 sp
->rtoinfo
.srto_initial
= net
->sctp
.rto_initial
;
5021 sp
->rtoinfo
.srto_max
= net
->sctp
.rto_max
;
5022 sp
->rtoinfo
.srto_min
= net
->sctp
.rto_min
;
5024 /* Initialize default association related parameters. These parameters
5025 * can be modified with the SCTP_ASSOCINFO socket option.
5027 sp
->assocparams
.sasoc_asocmaxrxt
= net
->sctp
.max_retrans_association
;
5028 sp
->assocparams
.sasoc_number_peer_destinations
= 0;
5029 sp
->assocparams
.sasoc_peer_rwnd
= 0;
5030 sp
->assocparams
.sasoc_local_rwnd
= 0;
5031 sp
->assocparams
.sasoc_cookie_life
= net
->sctp
.valid_cookie_life
;
5033 /* Initialize default event subscriptions. By default, all the
5038 /* Default Peer Address Parameters. These defaults can
5039 * be modified via SCTP_PEER_ADDR_PARAMS
5041 sp
->hbinterval
= net
->sctp
.hb_interval
;
5042 sp
->pathmaxrxt
= net
->sctp
.max_retrans_path
;
5043 sp
->pf_retrans
= net
->sctp
.pf_retrans
;
5044 sp
->pathmtu
= 0; /* allow default discovery */
5045 sp
->sackdelay
= net
->sctp
.sack_timeout
;
5047 sp
->param_flags
= SPP_HB_ENABLE
|
5049 SPP_SACKDELAY_ENABLE
;
5050 sp
->default_ss
= SCTP_SS_DEFAULT
;
5052 /* If enabled no SCTP message fragmentation will be performed.
5053 * Configure through SCTP_DISABLE_FRAGMENTS socket option.
5055 sp
->disable_fragments
= 0;
5057 /* Enable Nagle algorithm by default. */
5060 sp
->recvrcvinfo
= 0;
5061 sp
->recvnxtinfo
= 0;
5063 /* Enable by default. */
5066 /* Auto-close idle associations after the configured
5067 * number of seconds. A value of 0 disables this
5068 * feature. Configure through the SCTP_AUTOCLOSE socket option,
5069 * for UDP-style sockets only.
5073 /* User specified fragmentation limit. */
5076 sp
->adaptation_ind
= 0;
5078 sp
->pf
= sctp_get_pf_specific(sk
->sk_family
);
5080 /* Control variables for partial data delivery. */
5081 atomic_set(&sp
->pd_mode
, 0);
5082 skb_queue_head_init(&sp
->pd_lobby
);
5083 sp
->frag_interleave
= 0;
5085 /* Create a per socket endpoint structure. Even if we
5086 * change the data structure relationships, this may still
5087 * be useful for storing pre-connect address information.
5089 sp
->ep
= sctp_endpoint_new(sk
, GFP_KERNEL
);
5095 sk
->sk_destruct
= sctp_destruct_sock
;
5097 SCTP_DBG_OBJCNT_INC(sock
);
5100 sk_sockets_allocated_inc(sk
);
5101 sock_prot_inuse_add(net
, sk
->sk_prot
, 1);
5103 /* Nothing can fail after this block, otherwise
5104 * sctp_destroy_sock() will be called without addr_wq_lock held
5106 if (net
->sctp
.default_auto_asconf
) {
5107 spin_lock(&sock_net(sk
)->sctp
.addr_wq_lock
);
5108 list_add_tail(&sp
->auto_asconf_list
,
5109 &net
->sctp
.auto_asconf_splist
);
5110 sp
->do_auto_asconf
= 1;
5111 spin_unlock(&sock_net(sk
)->sctp
.addr_wq_lock
);
5113 sp
->do_auto_asconf
= 0;
5121 /* Cleanup any SCTP per socket resources. Must be called with
5122 * sock_net(sk)->sctp.addr_wq_lock held if sp->do_auto_asconf is true
5124 static void sctp_destroy_sock(struct sock
*sk
)
5126 struct sctp_sock
*sp
;
5128 pr_debug("%s: sk:%p\n", __func__
, sk
);
5130 /* Release our hold on the endpoint. */
5132 /* This could happen during socket init, thus we bail out
5133 * early, since the rest of the below is not setup either.
5138 if (sp
->do_auto_asconf
) {
5139 sp
->do_auto_asconf
= 0;
5140 list_del(&sp
->auto_asconf_list
);
5142 sctp_endpoint_free(sp
->ep
);
5144 sk_sockets_allocated_dec(sk
);
5145 sock_prot_inuse_add(sock_net(sk
), sk
->sk_prot
, -1);
5149 /* Triggered when there are no references on the socket anymore */
5150 static void sctp_destruct_sock(struct sock
*sk
)
5152 struct sctp_sock
*sp
= sctp_sk(sk
);
5154 /* Free up the HMAC transform. */
5155 crypto_free_shash(sp
->hmac
);
5157 inet_sock_destruct(sk
);
5160 /* API 4.1.7 shutdown() - TCP Style Syntax
5161 * int shutdown(int socket, int how);
5163 * sd - the socket descriptor of the association to be closed.
5164 * how - Specifies the type of shutdown. The values are
5167 * Disables further receive operations. No SCTP
5168 * protocol action is taken.
5170 * Disables further send operations, and initiates
5171 * the SCTP shutdown sequence.
5173 * Disables further send and receive operations
5174 * and initiates the SCTP shutdown sequence.
5176 static void sctp_shutdown(struct sock
*sk
, int how
)
5178 struct net
*net
= sock_net(sk
);
5179 struct sctp_endpoint
*ep
;
5181 if (!sctp_style(sk
, TCP
))
5184 ep
= sctp_sk(sk
)->ep
;
5185 if (how
& SEND_SHUTDOWN
&& !list_empty(&ep
->asocs
)) {
5186 struct sctp_association
*asoc
;
5188 inet_sk_set_state(sk
, SCTP_SS_CLOSING
);
5189 asoc
= list_entry(ep
->asocs
.next
,
5190 struct sctp_association
, asocs
);
5191 sctp_primitive_SHUTDOWN(net
, asoc
, NULL
);
5195 int sctp_get_sctp_info(struct sock
*sk
, struct sctp_association
*asoc
,
5196 struct sctp_info
*info
)
5198 struct sctp_transport
*prim
;
5199 struct list_head
*pos
;
5202 memset(info
, 0, sizeof(*info
));
5204 struct sctp_sock
*sp
= sctp_sk(sk
);
5206 info
->sctpi_s_autoclose
= sp
->autoclose
;
5207 info
->sctpi_s_adaptation_ind
= sp
->adaptation_ind
;
5208 info
->sctpi_s_pd_point
= sp
->pd_point
;
5209 info
->sctpi_s_nodelay
= sp
->nodelay
;
5210 info
->sctpi_s_disable_fragments
= sp
->disable_fragments
;
5211 info
->sctpi_s_v4mapped
= sp
->v4mapped
;
5212 info
->sctpi_s_frag_interleave
= sp
->frag_interleave
;
5213 info
->sctpi_s_type
= sp
->type
;
5218 info
->sctpi_tag
= asoc
->c
.my_vtag
;
5219 info
->sctpi_state
= asoc
->state
;
5220 info
->sctpi_rwnd
= asoc
->a_rwnd
;
5221 info
->sctpi_unackdata
= asoc
->unack_data
;
5222 info
->sctpi_penddata
= sctp_tsnmap_pending(&asoc
->peer
.tsn_map
);
5223 info
->sctpi_instrms
= asoc
->stream
.incnt
;
5224 info
->sctpi_outstrms
= asoc
->stream
.outcnt
;
5225 list_for_each(pos
, &asoc
->base
.inqueue
.in_chunk_list
)
5226 info
->sctpi_inqueue
++;
5227 list_for_each(pos
, &asoc
->outqueue
.out_chunk_list
)
5228 info
->sctpi_outqueue
++;
5229 info
->sctpi_overall_error
= asoc
->overall_error_count
;
5230 info
->sctpi_max_burst
= asoc
->max_burst
;
5231 info
->sctpi_maxseg
= asoc
->frag_point
;
5232 info
->sctpi_peer_rwnd
= asoc
->peer
.rwnd
;
5233 info
->sctpi_peer_tag
= asoc
->c
.peer_vtag
;
5235 mask
= asoc
->peer
.ecn_capable
<< 1;
5236 mask
= (mask
| asoc
->peer
.ipv4_address
) << 1;
5237 mask
= (mask
| asoc
->peer
.ipv6_address
) << 1;
5238 mask
= (mask
| asoc
->peer
.hostname_address
) << 1;
5239 mask
= (mask
| asoc
->peer
.asconf_capable
) << 1;
5240 mask
= (mask
| asoc
->peer
.prsctp_capable
) << 1;
5241 mask
= (mask
| asoc
->peer
.auth_capable
);
5242 info
->sctpi_peer_capable
= mask
;
5243 mask
= asoc
->peer
.sack_needed
<< 1;
5244 mask
= (mask
| asoc
->peer
.sack_generation
) << 1;
5245 mask
= (mask
| asoc
->peer
.zero_window_announced
);
5246 info
->sctpi_peer_sack
= mask
;
5248 info
->sctpi_isacks
= asoc
->stats
.isacks
;
5249 info
->sctpi_osacks
= asoc
->stats
.osacks
;
5250 info
->sctpi_opackets
= asoc
->stats
.opackets
;
5251 info
->sctpi_ipackets
= asoc
->stats
.ipackets
;
5252 info
->sctpi_rtxchunks
= asoc
->stats
.rtxchunks
;
5253 info
->sctpi_outofseqtsns
= asoc
->stats
.outofseqtsns
;
5254 info
->sctpi_idupchunks
= asoc
->stats
.idupchunks
;
5255 info
->sctpi_gapcnt
= asoc
->stats
.gapcnt
;
5256 info
->sctpi_ouodchunks
= asoc
->stats
.ouodchunks
;
5257 info
->sctpi_iuodchunks
= asoc
->stats
.iuodchunks
;
5258 info
->sctpi_oodchunks
= asoc
->stats
.oodchunks
;
5259 info
->sctpi_iodchunks
= asoc
->stats
.iodchunks
;
5260 info
->sctpi_octrlchunks
= asoc
->stats
.octrlchunks
;
5261 info
->sctpi_ictrlchunks
= asoc
->stats
.ictrlchunks
;
5263 prim
= asoc
->peer
.primary_path
;
5264 memcpy(&info
->sctpi_p_address
, &prim
->ipaddr
, sizeof(prim
->ipaddr
));
5265 info
->sctpi_p_state
= prim
->state
;
5266 info
->sctpi_p_cwnd
= prim
->cwnd
;
5267 info
->sctpi_p_srtt
= prim
->srtt
;
5268 info
->sctpi_p_rto
= jiffies_to_msecs(prim
->rto
);
5269 info
->sctpi_p_hbinterval
= prim
->hbinterval
;
5270 info
->sctpi_p_pathmaxrxt
= prim
->pathmaxrxt
;
5271 info
->sctpi_p_sackdelay
= jiffies_to_msecs(prim
->sackdelay
);
5272 info
->sctpi_p_ssthresh
= prim
->ssthresh
;
5273 info
->sctpi_p_partial_bytes_acked
= prim
->partial_bytes_acked
;
5274 info
->sctpi_p_flight_size
= prim
->flight_size
;
5275 info
->sctpi_p_error
= prim
->error_count
;
5279 EXPORT_SYMBOL_GPL(sctp_get_sctp_info
);
5281 /* use callback to avoid exporting the core structure */
5282 void sctp_transport_walk_start(struct rhashtable_iter
*iter
)
5284 rhltable_walk_enter(&sctp_transport_hashtable
, iter
);
5286 rhashtable_walk_start(iter
);
5289 void sctp_transport_walk_stop(struct rhashtable_iter
*iter
)
5291 rhashtable_walk_stop(iter
);
5292 rhashtable_walk_exit(iter
);
5295 struct sctp_transport
*sctp_transport_get_next(struct net
*net
,
5296 struct rhashtable_iter
*iter
)
5298 struct sctp_transport
*t
;
5300 t
= rhashtable_walk_next(iter
);
5301 for (; t
; t
= rhashtable_walk_next(iter
)) {
5303 if (PTR_ERR(t
) == -EAGAIN
)
5308 if (!sctp_transport_hold(t
))
5311 if (net_eq(sock_net(t
->asoc
->base
.sk
), net
) &&
5312 t
->asoc
->peer
.primary_path
== t
)
5315 sctp_transport_put(t
);
5321 struct sctp_transport
*sctp_transport_get_idx(struct net
*net
,
5322 struct rhashtable_iter
*iter
,
5325 struct sctp_transport
*t
;
5328 return SEQ_START_TOKEN
;
5330 while ((t
= sctp_transport_get_next(net
, iter
)) && !IS_ERR(t
)) {
5333 sctp_transport_put(t
);
5339 int sctp_for_each_endpoint(int (*cb
)(struct sctp_endpoint
*, void *),
5343 struct sctp_ep_common
*epb
;
5344 struct sctp_hashbucket
*head
;
5346 for (head
= sctp_ep_hashtable
; hash
< sctp_ep_hashsize
;
5348 read_lock_bh(&head
->lock
);
5349 sctp_for_each_hentry(epb
, &head
->chain
) {
5350 err
= cb(sctp_ep(epb
), p
);
5354 read_unlock_bh(&head
->lock
);
5359 EXPORT_SYMBOL_GPL(sctp_for_each_endpoint
);
5361 int sctp_transport_lookup_process(int (*cb
)(struct sctp_transport
*, void *),
5363 const union sctp_addr
*laddr
,
5364 const union sctp_addr
*paddr
, void *p
)
5366 struct sctp_transport
*transport
;
5370 transport
= sctp_addrs_lookup_transport(net
, laddr
, paddr
);
5375 err
= cb(transport
, p
);
5376 sctp_transport_put(transport
);
5380 EXPORT_SYMBOL_GPL(sctp_transport_lookup_process
);
5382 int sctp_for_each_transport(int (*cb
)(struct sctp_transport
*, void *),
5383 int (*cb_done
)(struct sctp_transport
*, void *),
5384 struct net
*net
, int *pos
, void *p
) {
5385 struct rhashtable_iter hti
;
5386 struct sctp_transport
*tsp
;
5391 sctp_transport_walk_start(&hti
);
5393 tsp
= sctp_transport_get_idx(net
, &hti
, *pos
+ 1);
5394 for (; !IS_ERR_OR_NULL(tsp
); tsp
= sctp_transport_get_next(net
, &hti
)) {
5399 sctp_transport_put(tsp
);
5401 sctp_transport_walk_stop(&hti
);
5404 if (cb_done
&& !cb_done(tsp
, p
)) {
5406 sctp_transport_put(tsp
);
5409 sctp_transport_put(tsp
);
5414 EXPORT_SYMBOL_GPL(sctp_for_each_transport
);
5416 /* 7.2.1 Association Status (SCTP_STATUS)
5418 * Applications can retrieve current status information about an
5419 * association, including association state, peer receiver window size,
5420 * number of unacked data chunks, and number of data chunks pending
5421 * receipt. This information is read-only.
5423 static int sctp_getsockopt_sctp_status(struct sock
*sk
, int len
,
5424 char __user
*optval
,
5427 struct sctp_status status
;
5428 struct sctp_association
*asoc
= NULL
;
5429 struct sctp_transport
*transport
;
5430 sctp_assoc_t associd
;
5433 if (len
< sizeof(status
)) {
5438 len
= sizeof(status
);
5439 if (copy_from_user(&status
, optval
, len
)) {
5444 associd
= status
.sstat_assoc_id
;
5445 asoc
= sctp_id2assoc(sk
, associd
);
5451 transport
= asoc
->peer
.primary_path
;
5453 status
.sstat_assoc_id
= sctp_assoc2id(asoc
);
5454 status
.sstat_state
= sctp_assoc_to_state(asoc
);
5455 status
.sstat_rwnd
= asoc
->peer
.rwnd
;
5456 status
.sstat_unackdata
= asoc
->unack_data
;
5458 status
.sstat_penddata
= sctp_tsnmap_pending(&asoc
->peer
.tsn_map
);
5459 status
.sstat_instrms
= asoc
->stream
.incnt
;
5460 status
.sstat_outstrms
= asoc
->stream
.outcnt
;
5461 status
.sstat_fragmentation_point
= asoc
->frag_point
;
5462 status
.sstat_primary
.spinfo_assoc_id
= sctp_assoc2id(transport
->asoc
);
5463 memcpy(&status
.sstat_primary
.spinfo_address
, &transport
->ipaddr
,
5464 transport
->af_specific
->sockaddr_len
);
5465 /* Map ipv4 address into v4-mapped-on-v6 address. */
5466 sctp_get_pf_specific(sk
->sk_family
)->addr_to_user(sctp_sk(sk
),
5467 (union sctp_addr
*)&status
.sstat_primary
.spinfo_address
);
5468 status
.sstat_primary
.spinfo_state
= transport
->state
;
5469 status
.sstat_primary
.spinfo_cwnd
= transport
->cwnd
;
5470 status
.sstat_primary
.spinfo_srtt
= transport
->srtt
;
5471 status
.sstat_primary
.spinfo_rto
= jiffies_to_msecs(transport
->rto
);
5472 status
.sstat_primary
.spinfo_mtu
= transport
->pathmtu
;
5474 if (status
.sstat_primary
.spinfo_state
== SCTP_UNKNOWN
)
5475 status
.sstat_primary
.spinfo_state
= SCTP_ACTIVE
;
5477 if (put_user(len
, optlen
)) {
5482 pr_debug("%s: len:%d, state:%d, rwnd:%d, assoc_id:%d\n",
5483 __func__
, len
, status
.sstat_state
, status
.sstat_rwnd
,
5484 status
.sstat_assoc_id
);
5486 if (copy_to_user(optval
, &status
, len
)) {
5496 /* 7.2.2 Peer Address Information (SCTP_GET_PEER_ADDR_INFO)
5498 * Applications can retrieve information about a specific peer address
5499 * of an association, including its reachability state, congestion
5500 * window, and retransmission timer values. This information is
5503 static int sctp_getsockopt_peer_addr_info(struct sock
*sk
, int len
,
5504 char __user
*optval
,
5507 struct sctp_paddrinfo pinfo
;
5508 struct sctp_transport
*transport
;
5511 if (len
< sizeof(pinfo
)) {
5516 len
= sizeof(pinfo
);
5517 if (copy_from_user(&pinfo
, optval
, len
)) {
5522 transport
= sctp_addr_id2transport(sk
, &pinfo
.spinfo_address
,
5523 pinfo
.spinfo_assoc_id
);
5527 pinfo
.spinfo_assoc_id
= sctp_assoc2id(transport
->asoc
);
5528 pinfo
.spinfo_state
= transport
->state
;
5529 pinfo
.spinfo_cwnd
= transport
->cwnd
;
5530 pinfo
.spinfo_srtt
= transport
->srtt
;
5531 pinfo
.spinfo_rto
= jiffies_to_msecs(transport
->rto
);
5532 pinfo
.spinfo_mtu
= transport
->pathmtu
;
5534 if (pinfo
.spinfo_state
== SCTP_UNKNOWN
)
5535 pinfo
.spinfo_state
= SCTP_ACTIVE
;
5537 if (put_user(len
, optlen
)) {
5542 if (copy_to_user(optval
, &pinfo
, len
)) {
5551 /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS)
5553 * This option is a on/off flag. If enabled no SCTP message
5554 * fragmentation will be performed. Instead if a message being sent
5555 * exceeds the current PMTU size, the message will NOT be sent and
5556 * instead a error will be indicated to the user.
5558 static int sctp_getsockopt_disable_fragments(struct sock
*sk
, int len
,
5559 char __user
*optval
, int __user
*optlen
)
5563 if (len
< sizeof(int))
5567 val
= (sctp_sk(sk
)->disable_fragments
== 1);
5568 if (put_user(len
, optlen
))
5570 if (copy_to_user(optval
, &val
, len
))
5575 /* 7.1.15 Set notification and ancillary events (SCTP_EVENTS)
5577 * This socket option is used to specify various notifications and
5578 * ancillary data the user wishes to receive.
5580 static int sctp_getsockopt_events(struct sock
*sk
, int len
, char __user
*optval
,
5583 struct sctp_event_subscribe subscribe
;
5584 __u8
*sn_type
= (__u8
*)&subscribe
;
5589 if (len
> sizeof(struct sctp_event_subscribe
))
5590 len
= sizeof(struct sctp_event_subscribe
);
5591 if (put_user(len
, optlen
))
5594 for (i
= 0; i
< len
; i
++)
5595 sn_type
[i
] = sctp_ulpevent_type_enabled(sctp_sk(sk
)->subscribe
,
5596 SCTP_SN_TYPE_BASE
+ i
);
5598 if (copy_to_user(optval
, &subscribe
, len
))
5604 /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE)
5606 * This socket option is applicable to the UDP-style socket only. When
5607 * set it will cause associations that are idle for more than the
5608 * specified number of seconds to automatically close. An association
5609 * being idle is defined an association that has NOT sent or received
5610 * user data. The special value of '0' indicates that no automatic
5611 * close of any associations should be performed. The option expects an
5612 * integer defining the number of seconds of idle time before an
5613 * association is closed.
5615 static int sctp_getsockopt_autoclose(struct sock
*sk
, int len
, char __user
*optval
, int __user
*optlen
)
5617 /* Applicable to UDP-style socket only */
5618 if (sctp_style(sk
, TCP
))
5620 if (len
< sizeof(int))
5623 if (put_user(len
, optlen
))
5625 if (put_user(sctp_sk(sk
)->autoclose
, (int __user
*)optval
))
5630 /* Helper routine to branch off an association to a new socket. */
5631 int sctp_do_peeloff(struct sock
*sk
, sctp_assoc_t id
, struct socket
**sockp
)
5633 struct sctp_association
*asoc
= sctp_id2assoc(sk
, id
);
5634 struct sctp_sock
*sp
= sctp_sk(sk
);
5635 struct socket
*sock
;
5638 /* Do not peel off from one netns to another one. */
5639 if (!net_eq(current
->nsproxy
->net_ns
, sock_net(sk
)))
5645 /* An association cannot be branched off from an already peeled-off
5646 * socket, nor is this supported for tcp style sockets.
5648 if (!sctp_style(sk
, UDP
))
5651 /* Create a new socket. */
5652 err
= sock_create(sk
->sk_family
, SOCK_SEQPACKET
, IPPROTO_SCTP
, &sock
);
5656 sctp_copy_sock(sock
->sk
, sk
, asoc
);
5658 /* Make peeled-off sockets more like 1-1 accepted sockets.
5659 * Set the daddr and initialize id to something more random and also
5660 * copy over any ip options.
5662 sp
->pf
->to_sk_daddr(&asoc
->peer
.primary_addr
, sk
);
5663 sp
->pf
->copy_ip_options(sk
, sock
->sk
);
5665 /* Populate the fields of the newsk from the oldsk and migrate the
5666 * asoc to the newsk.
5668 err
= sctp_sock_migrate(sk
, sock
->sk
, asoc
,
5669 SCTP_SOCKET_UDP_HIGH_BANDWIDTH
);
5679 EXPORT_SYMBOL(sctp_do_peeloff
);
5681 static int sctp_getsockopt_peeloff_common(struct sock
*sk
, sctp_peeloff_arg_t
*peeloff
,
5682 struct file
**newfile
, unsigned flags
)
5684 struct socket
*newsock
;
5687 retval
= sctp_do_peeloff(sk
, peeloff
->associd
, &newsock
);
5691 /* Map the socket to an unused fd that can be returned to the user. */
5692 retval
= get_unused_fd_flags(flags
& SOCK_CLOEXEC
);
5694 sock_release(newsock
);
5698 *newfile
= sock_alloc_file(newsock
, 0, NULL
);
5699 if (IS_ERR(*newfile
)) {
5700 put_unused_fd(retval
);
5701 retval
= PTR_ERR(*newfile
);
5706 pr_debug("%s: sk:%p, newsk:%p, sd:%d\n", __func__
, sk
, newsock
->sk
,
5709 peeloff
->sd
= retval
;
5711 if (flags
& SOCK_NONBLOCK
)
5712 (*newfile
)->f_flags
|= O_NONBLOCK
;
5717 static int sctp_getsockopt_peeloff(struct sock
*sk
, int len
, char __user
*optval
, int __user
*optlen
)
5719 sctp_peeloff_arg_t peeloff
;
5720 struct file
*newfile
= NULL
;
5723 if (len
< sizeof(sctp_peeloff_arg_t
))
5725 len
= sizeof(sctp_peeloff_arg_t
);
5726 if (copy_from_user(&peeloff
, optval
, len
))
5729 retval
= sctp_getsockopt_peeloff_common(sk
, &peeloff
, &newfile
, 0);
5733 /* Return the fd mapped to the new socket. */
5734 if (put_user(len
, optlen
)) {
5736 put_unused_fd(retval
);
5740 if (copy_to_user(optval
, &peeloff
, len
)) {
5742 put_unused_fd(retval
);
5745 fd_install(retval
, newfile
);
5750 static int sctp_getsockopt_peeloff_flags(struct sock
*sk
, int len
,
5751 char __user
*optval
, int __user
*optlen
)
5753 sctp_peeloff_flags_arg_t peeloff
;
5754 struct file
*newfile
= NULL
;
5757 if (len
< sizeof(sctp_peeloff_flags_arg_t
))
5759 len
= sizeof(sctp_peeloff_flags_arg_t
);
5760 if (copy_from_user(&peeloff
, optval
, len
))
5763 retval
= sctp_getsockopt_peeloff_common(sk
, &peeloff
.p_arg
,
5764 &newfile
, peeloff
.flags
);
5768 /* Return the fd mapped to the new socket. */
5769 if (put_user(len
, optlen
)) {
5771 put_unused_fd(retval
);
5775 if (copy_to_user(optval
, &peeloff
, len
)) {
5777 put_unused_fd(retval
);
5780 fd_install(retval
, newfile
);
5785 /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS)
5787 * Applications can enable or disable heartbeats for any peer address of
5788 * an association, modify an address's heartbeat interval, force a
5789 * heartbeat to be sent immediately, and adjust the address's maximum
5790 * number of retransmissions sent before an address is considered
5791 * unreachable. The following structure is used to access and modify an
5792 * address's parameters:
5794 * struct sctp_paddrparams {
5795 * sctp_assoc_t spp_assoc_id;
5796 * struct sockaddr_storage spp_address;
5797 * uint32_t spp_hbinterval;
5798 * uint16_t spp_pathmaxrxt;
5799 * uint32_t spp_pathmtu;
5800 * uint32_t spp_sackdelay;
5801 * uint32_t spp_flags;
5804 * spp_assoc_id - (one-to-many style socket) This is filled in the
5805 * application, and identifies the association for
5807 * spp_address - This specifies which address is of interest.
5808 * spp_hbinterval - This contains the value of the heartbeat interval,
5809 * in milliseconds. If a value of zero
5810 * is present in this field then no changes are to
5811 * be made to this parameter.
5812 * spp_pathmaxrxt - This contains the maximum number of
5813 * retransmissions before this address shall be
5814 * considered unreachable. If a value of zero
5815 * is present in this field then no changes are to
5816 * be made to this parameter.
5817 * spp_pathmtu - When Path MTU discovery is disabled the value
5818 * specified here will be the "fixed" path mtu.
5819 * Note that if the spp_address field is empty
5820 * then all associations on this address will
5821 * have this fixed path mtu set upon them.
5823 * spp_sackdelay - When delayed sack is enabled, this value specifies
5824 * the number of milliseconds that sacks will be delayed
5825 * for. This value will apply to all addresses of an
5826 * association if the spp_address field is empty. Note
5827 * also, that if delayed sack is enabled and this
5828 * value is set to 0, no change is made to the last
5829 * recorded delayed sack timer value.
5831 * spp_flags - These flags are used to control various features
5832 * on an association. The flag field may contain
5833 * zero or more of the following options.
5835 * SPP_HB_ENABLE - Enable heartbeats on the
5836 * specified address. Note that if the address
5837 * field is empty all addresses for the association
5838 * have heartbeats enabled upon them.
5840 * SPP_HB_DISABLE - Disable heartbeats on the
5841 * speicifed address. Note that if the address
5842 * field is empty all addresses for the association
5843 * will have their heartbeats disabled. Note also
5844 * that SPP_HB_ENABLE and SPP_HB_DISABLE are
5845 * mutually exclusive, only one of these two should
5846 * be specified. Enabling both fields will have
5847 * undetermined results.
5849 * SPP_HB_DEMAND - Request a user initiated heartbeat
5850 * to be made immediately.
5852 * SPP_PMTUD_ENABLE - This field will enable PMTU
5853 * discovery upon the specified address. Note that
5854 * if the address feild is empty then all addresses
5855 * on the association are effected.
5857 * SPP_PMTUD_DISABLE - This field will disable PMTU
5858 * discovery upon the specified address. Note that
5859 * if the address feild is empty then all addresses
5860 * on the association are effected. Not also that
5861 * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually
5862 * exclusive. Enabling both will have undetermined
5865 * SPP_SACKDELAY_ENABLE - Setting this flag turns
5866 * on delayed sack. The time specified in spp_sackdelay
5867 * is used to specify the sack delay for this address. Note
5868 * that if spp_address is empty then all addresses will
5869 * enable delayed sack and take on the sack delay
5870 * value specified in spp_sackdelay.
5871 * SPP_SACKDELAY_DISABLE - Setting this flag turns
5872 * off delayed sack. If the spp_address field is blank then
5873 * delayed sack is disabled for the entire association. Note
5874 * also that this field is mutually exclusive to
5875 * SPP_SACKDELAY_ENABLE, setting both will have undefined
5878 * SPP_IPV6_FLOWLABEL: Setting this flag enables the
5879 * setting of the IPV6 flow label value. The value is
5880 * contained in the spp_ipv6_flowlabel field.
5881 * Upon retrieval, this flag will be set to indicate that
5882 * the spp_ipv6_flowlabel field has a valid value returned.
5883 * If a specific destination address is set (in the
5884 * spp_address field), then the value returned is that of
5885 * the address. If just an association is specified (and
5886 * no address), then the association's default flow label
5887 * is returned. If neither an association nor a destination
5888 * is specified, then the socket's default flow label is
5889 * returned. For non-IPv6 sockets, this flag will be left
5892 * SPP_DSCP: Setting this flag enables the setting of the
5893 * Differentiated Services Code Point (DSCP) value
5894 * associated with either the association or a specific
5895 * address. The value is obtained in the spp_dscp field.
5896 * Upon retrieval, this flag will be set to indicate that
5897 * the spp_dscp field has a valid value returned. If a
5898 * specific destination address is set when called (in the
5899 * spp_address field), then that specific destination
5900 * address's DSCP value is returned. If just an association
5901 * is specified, then the association's default DSCP is
5902 * returned. If neither an association nor a destination is
5903 * specified, then the socket's default DSCP is returned.
5905 * spp_ipv6_flowlabel
5906 * - This field is used in conjunction with the
5907 * SPP_IPV6_FLOWLABEL flag and contains the IPv6 flow label.
5908 * The 20 least significant bits are used for the flow
5909 * label. This setting has precedence over any IPv6-layer
5912 * spp_dscp - This field is used in conjunction with the SPP_DSCP flag
5913 * and contains the DSCP. The 6 most significant bits are
5914 * used for the DSCP. This setting has precedence over any
5915 * IPv4- or IPv6- layer setting.
5917 static int sctp_getsockopt_peer_addr_params(struct sock
*sk
, int len
,
5918 char __user
*optval
, int __user
*optlen
)
5920 struct sctp_paddrparams params
;
5921 struct sctp_transport
*trans
= NULL
;
5922 struct sctp_association
*asoc
= NULL
;
5923 struct sctp_sock
*sp
= sctp_sk(sk
);
5925 if (len
>= sizeof(params
))
5926 len
= sizeof(params
);
5927 else if (len
>= ALIGN(offsetof(struct sctp_paddrparams
,
5928 spp_ipv6_flowlabel
), 4))
5929 len
= ALIGN(offsetof(struct sctp_paddrparams
,
5930 spp_ipv6_flowlabel
), 4);
5934 if (copy_from_user(¶ms
, optval
, len
))
5937 /* If an address other than INADDR_ANY is specified, and
5938 * no transport is found, then the request is invalid.
5940 if (!sctp_is_any(sk
, (union sctp_addr
*)¶ms
.spp_address
)) {
5941 trans
= sctp_addr_id2transport(sk
, ¶ms
.spp_address
,
5942 params
.spp_assoc_id
);
5944 pr_debug("%s: failed no transport\n", __func__
);
5949 /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
5950 * socket is a one to many style socket, and an association
5951 * was not found, then the id was invalid.
5953 asoc
= sctp_id2assoc(sk
, params
.spp_assoc_id
);
5954 if (!asoc
&& params
.spp_assoc_id
!= SCTP_FUTURE_ASSOC
&&
5955 sctp_style(sk
, UDP
)) {
5956 pr_debug("%s: failed no association\n", __func__
);
5961 /* Fetch transport values. */
5962 params
.spp_hbinterval
= jiffies_to_msecs(trans
->hbinterval
);
5963 params
.spp_pathmtu
= trans
->pathmtu
;
5964 params
.spp_pathmaxrxt
= trans
->pathmaxrxt
;
5965 params
.spp_sackdelay
= jiffies_to_msecs(trans
->sackdelay
);
5967 /*draft-11 doesn't say what to return in spp_flags*/
5968 params
.spp_flags
= trans
->param_flags
;
5969 if (trans
->flowlabel
& SCTP_FLOWLABEL_SET_MASK
) {
5970 params
.spp_ipv6_flowlabel
= trans
->flowlabel
&
5971 SCTP_FLOWLABEL_VAL_MASK
;
5972 params
.spp_flags
|= SPP_IPV6_FLOWLABEL
;
5974 if (trans
->dscp
& SCTP_DSCP_SET_MASK
) {
5975 params
.spp_dscp
= trans
->dscp
& SCTP_DSCP_VAL_MASK
;
5976 params
.spp_flags
|= SPP_DSCP
;
5979 /* Fetch association values. */
5980 params
.spp_hbinterval
= jiffies_to_msecs(asoc
->hbinterval
);
5981 params
.spp_pathmtu
= asoc
->pathmtu
;
5982 params
.spp_pathmaxrxt
= asoc
->pathmaxrxt
;
5983 params
.spp_sackdelay
= jiffies_to_msecs(asoc
->sackdelay
);
5985 /*draft-11 doesn't say what to return in spp_flags*/
5986 params
.spp_flags
= asoc
->param_flags
;
5987 if (asoc
->flowlabel
& SCTP_FLOWLABEL_SET_MASK
) {
5988 params
.spp_ipv6_flowlabel
= asoc
->flowlabel
&
5989 SCTP_FLOWLABEL_VAL_MASK
;
5990 params
.spp_flags
|= SPP_IPV6_FLOWLABEL
;
5992 if (asoc
->dscp
& SCTP_DSCP_SET_MASK
) {
5993 params
.spp_dscp
= asoc
->dscp
& SCTP_DSCP_VAL_MASK
;
5994 params
.spp_flags
|= SPP_DSCP
;
5997 /* Fetch socket values. */
5998 params
.spp_hbinterval
= sp
->hbinterval
;
5999 params
.spp_pathmtu
= sp
->pathmtu
;
6000 params
.spp_sackdelay
= sp
->sackdelay
;
6001 params
.spp_pathmaxrxt
= sp
->pathmaxrxt
;
6003 /*draft-11 doesn't say what to return in spp_flags*/
6004 params
.spp_flags
= sp
->param_flags
;
6005 if (sp
->flowlabel
& SCTP_FLOWLABEL_SET_MASK
) {
6006 params
.spp_ipv6_flowlabel
= sp
->flowlabel
&
6007 SCTP_FLOWLABEL_VAL_MASK
;
6008 params
.spp_flags
|= SPP_IPV6_FLOWLABEL
;
6010 if (sp
->dscp
& SCTP_DSCP_SET_MASK
) {
6011 params
.spp_dscp
= sp
->dscp
& SCTP_DSCP_VAL_MASK
;
6012 params
.spp_flags
|= SPP_DSCP
;
6016 if (copy_to_user(optval
, ¶ms
, len
))
6019 if (put_user(len
, optlen
))
6026 * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK)
6028 * This option will effect the way delayed acks are performed. This
6029 * option allows you to get or set the delayed ack time, in
6030 * milliseconds. It also allows changing the delayed ack frequency.
6031 * Changing the frequency to 1 disables the delayed sack algorithm. If
6032 * the assoc_id is 0, then this sets or gets the endpoints default
6033 * values. If the assoc_id field is non-zero, then the set or get
6034 * effects the specified association for the one to many model (the
6035 * assoc_id field is ignored by the one to one model). Note that if
6036 * sack_delay or sack_freq are 0 when setting this option, then the
6037 * current values will remain unchanged.
6039 * struct sctp_sack_info {
6040 * sctp_assoc_t sack_assoc_id;
6041 * uint32_t sack_delay;
6042 * uint32_t sack_freq;
6045 * sack_assoc_id - This parameter, indicates which association the user
6046 * is performing an action upon. Note that if this field's value is
6047 * zero then the endpoints default value is changed (effecting future
6048 * associations only).
6050 * sack_delay - This parameter contains the number of milliseconds that
6051 * the user is requesting the delayed ACK timer be set to. Note that
6052 * this value is defined in the standard to be between 200 and 500
6055 * sack_freq - This parameter contains the number of packets that must
6056 * be received before a sack is sent without waiting for the delay
6057 * timer to expire. The default value for this is 2, setting this
6058 * value to 1 will disable the delayed sack algorithm.
6060 static int sctp_getsockopt_delayed_ack(struct sock
*sk
, int len
,
6061 char __user
*optval
,
6064 struct sctp_sack_info params
;
6065 struct sctp_association
*asoc
= NULL
;
6066 struct sctp_sock
*sp
= sctp_sk(sk
);
6068 if (len
>= sizeof(struct sctp_sack_info
)) {
6069 len
= sizeof(struct sctp_sack_info
);
6071 if (copy_from_user(¶ms
, optval
, len
))
6073 } else if (len
== sizeof(struct sctp_assoc_value
)) {
6074 pr_warn_ratelimited(DEPRECATED
6076 "Use of struct sctp_assoc_value in delayed_ack socket option.\n"
6077 "Use struct sctp_sack_info instead\n",
6078 current
->comm
, task_pid_nr(current
));
6079 if (copy_from_user(¶ms
, optval
, len
))
6084 /* Get association, if sack_assoc_id != SCTP_FUTURE_ASSOC and the
6085 * socket is a one to many style socket, and an association
6086 * was not found, then the id was invalid.
6088 asoc
= sctp_id2assoc(sk
, params
.sack_assoc_id
);
6089 if (!asoc
&& params
.sack_assoc_id
!= SCTP_FUTURE_ASSOC
&&
6090 sctp_style(sk
, UDP
))
6094 /* Fetch association values. */
6095 if (asoc
->param_flags
& SPP_SACKDELAY_ENABLE
) {
6096 params
.sack_delay
= jiffies_to_msecs(asoc
->sackdelay
);
6097 params
.sack_freq
= asoc
->sackfreq
;
6100 params
.sack_delay
= 0;
6101 params
.sack_freq
= 1;
6104 /* Fetch socket values. */
6105 if (sp
->param_flags
& SPP_SACKDELAY_ENABLE
) {
6106 params
.sack_delay
= sp
->sackdelay
;
6107 params
.sack_freq
= sp
->sackfreq
;
6109 params
.sack_delay
= 0;
6110 params
.sack_freq
= 1;
6114 if (copy_to_user(optval
, ¶ms
, len
))
6117 if (put_user(len
, optlen
))
6123 /* 7.1.3 Initialization Parameters (SCTP_INITMSG)
6125 * Applications can specify protocol parameters for the default association
6126 * initialization. The option name argument to setsockopt() and getsockopt()
6129 * Setting initialization parameters is effective only on an unconnected
6130 * socket (for UDP-style sockets only future associations are effected
6131 * by the change). With TCP-style sockets, this option is inherited by
6132 * sockets derived from a listener socket.
6134 static int sctp_getsockopt_initmsg(struct sock
*sk
, int len
, char __user
*optval
, int __user
*optlen
)
6136 if (len
< sizeof(struct sctp_initmsg
))
6138 len
= sizeof(struct sctp_initmsg
);
6139 if (put_user(len
, optlen
))
6141 if (copy_to_user(optval
, &sctp_sk(sk
)->initmsg
, len
))
6147 static int sctp_getsockopt_peer_addrs(struct sock
*sk
, int len
,
6148 char __user
*optval
, int __user
*optlen
)
6150 struct sctp_association
*asoc
;
6152 struct sctp_getaddrs getaddrs
;
6153 struct sctp_transport
*from
;
6155 union sctp_addr temp
;
6156 struct sctp_sock
*sp
= sctp_sk(sk
);
6161 if (len
< sizeof(struct sctp_getaddrs
))
6164 if (copy_from_user(&getaddrs
, optval
, sizeof(struct sctp_getaddrs
)))
6167 /* For UDP-style sockets, id specifies the association to query. */
6168 asoc
= sctp_id2assoc(sk
, getaddrs
.assoc_id
);
6172 to
= optval
+ offsetof(struct sctp_getaddrs
, addrs
);
6173 space_left
= len
- offsetof(struct sctp_getaddrs
, addrs
);
6175 list_for_each_entry(from
, &asoc
->peer
.transport_addr_list
,
6177 memcpy(&temp
, &from
->ipaddr
, sizeof(temp
));
6178 addrlen
= sctp_get_pf_specific(sk
->sk_family
)
6179 ->addr_to_user(sp
, &temp
);
6180 if (space_left
< addrlen
)
6182 if (copy_to_user(to
, &temp
, addrlen
))
6186 space_left
-= addrlen
;
6189 if (put_user(cnt
, &((struct sctp_getaddrs __user
*)optval
)->addr_num
))
6191 bytes_copied
= ((char __user
*)to
) - optval
;
6192 if (put_user(bytes_copied
, optlen
))
6198 static int sctp_copy_laddrs(struct sock
*sk
, __u16 port
, void *to
,
6199 size_t space_left
, int *bytes_copied
)
6201 struct sctp_sockaddr_entry
*addr
;
6202 union sctp_addr temp
;
6205 struct net
*net
= sock_net(sk
);
6208 list_for_each_entry_rcu(addr
, &net
->sctp
.local_addr_list
, list
) {
6212 if ((PF_INET
== sk
->sk_family
) &&
6213 (AF_INET6
== addr
->a
.sa
.sa_family
))
6215 if ((PF_INET6
== sk
->sk_family
) &&
6216 inet_v6_ipv6only(sk
) &&
6217 (AF_INET
== addr
->a
.sa
.sa_family
))
6219 memcpy(&temp
, &addr
->a
, sizeof(temp
));
6220 if (!temp
.v4
.sin_port
)
6221 temp
.v4
.sin_port
= htons(port
);
6223 addrlen
= sctp_get_pf_specific(sk
->sk_family
)
6224 ->addr_to_user(sctp_sk(sk
), &temp
);
6226 if (space_left
< addrlen
) {
6230 memcpy(to
, &temp
, addrlen
);
6234 space_left
-= addrlen
;
6235 *bytes_copied
+= addrlen
;
6243 static int sctp_getsockopt_local_addrs(struct sock
*sk
, int len
,
6244 char __user
*optval
, int __user
*optlen
)
6246 struct sctp_bind_addr
*bp
;
6247 struct sctp_association
*asoc
;
6249 struct sctp_getaddrs getaddrs
;
6250 struct sctp_sockaddr_entry
*addr
;
6252 union sctp_addr temp
;
6253 struct sctp_sock
*sp
= sctp_sk(sk
);
6257 int bytes_copied
= 0;
6261 if (len
< sizeof(struct sctp_getaddrs
))
6264 if (copy_from_user(&getaddrs
, optval
, sizeof(struct sctp_getaddrs
)))
6268 * For UDP-style sockets, id specifies the association to query.
6269 * If the id field is set to the value '0' then the locally bound
6270 * addresses are returned without regard to any particular
6273 if (0 == getaddrs
.assoc_id
) {
6274 bp
= &sctp_sk(sk
)->ep
->base
.bind_addr
;
6276 asoc
= sctp_id2assoc(sk
, getaddrs
.assoc_id
);
6279 bp
= &asoc
->base
.bind_addr
;
6282 to
= optval
+ offsetof(struct sctp_getaddrs
, addrs
);
6283 space_left
= len
- offsetof(struct sctp_getaddrs
, addrs
);
6285 addrs
= kmalloc(space_left
, GFP_USER
| __GFP_NOWARN
);
6289 /* If the endpoint is bound to 0.0.0.0 or ::0, get the valid
6290 * addresses from the global local address list.
6292 if (sctp_list_single_entry(&bp
->address_list
)) {
6293 addr
= list_entry(bp
->address_list
.next
,
6294 struct sctp_sockaddr_entry
, list
);
6295 if (sctp_is_any(sk
, &addr
->a
)) {
6296 cnt
= sctp_copy_laddrs(sk
, bp
->port
, addrs
,
6297 space_left
, &bytes_copied
);
6307 /* Protection on the bound address list is not needed since
6308 * in the socket option context we hold a socket lock and
6309 * thus the bound address list can't change.
6311 list_for_each_entry(addr
, &bp
->address_list
, list
) {
6312 memcpy(&temp
, &addr
->a
, sizeof(temp
));
6313 addrlen
= sctp_get_pf_specific(sk
->sk_family
)
6314 ->addr_to_user(sp
, &temp
);
6315 if (space_left
< addrlen
) {
6316 err
= -ENOMEM
; /*fixme: right error?*/
6319 memcpy(buf
, &temp
, addrlen
);
6321 bytes_copied
+= addrlen
;
6323 space_left
-= addrlen
;
6327 if (copy_to_user(to
, addrs
, bytes_copied
)) {
6331 if (put_user(cnt
, &((struct sctp_getaddrs __user
*)optval
)->addr_num
)) {
6335 /* XXX: We should have accounted for sizeof(struct sctp_getaddrs) too,
6336 * but we can't change it anymore.
6338 if (put_user(bytes_copied
, optlen
))
6345 /* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
6347 * Requests that the local SCTP stack use the enclosed peer address as
6348 * the association primary. The enclosed address must be one of the
6349 * association peer's addresses.
6351 static int sctp_getsockopt_primary_addr(struct sock
*sk
, int len
,
6352 char __user
*optval
, int __user
*optlen
)
6354 struct sctp_prim prim
;
6355 struct sctp_association
*asoc
;
6356 struct sctp_sock
*sp
= sctp_sk(sk
);
6358 if (len
< sizeof(struct sctp_prim
))
6361 len
= sizeof(struct sctp_prim
);
6363 if (copy_from_user(&prim
, optval
, len
))
6366 asoc
= sctp_id2assoc(sk
, prim
.ssp_assoc_id
);
6370 if (!asoc
->peer
.primary_path
)
6373 memcpy(&prim
.ssp_addr
, &asoc
->peer
.primary_path
->ipaddr
,
6374 asoc
->peer
.primary_path
->af_specific
->sockaddr_len
);
6376 sctp_get_pf_specific(sk
->sk_family
)->addr_to_user(sp
,
6377 (union sctp_addr
*)&prim
.ssp_addr
);
6379 if (put_user(len
, optlen
))
6381 if (copy_to_user(optval
, &prim
, len
))
6388 * 7.1.11 Set Adaptation Layer Indicator (SCTP_ADAPTATION_LAYER)
6390 * Requests that the local endpoint set the specified Adaptation Layer
6391 * Indication parameter for all future INIT and INIT-ACK exchanges.
6393 static int sctp_getsockopt_adaptation_layer(struct sock
*sk
, int len
,
6394 char __user
*optval
, int __user
*optlen
)
6396 struct sctp_setadaptation adaptation
;
6398 if (len
< sizeof(struct sctp_setadaptation
))
6401 len
= sizeof(struct sctp_setadaptation
);
6403 adaptation
.ssb_adaptation_ind
= sctp_sk(sk
)->adaptation_ind
;
6405 if (put_user(len
, optlen
))
6407 if (copy_to_user(optval
, &adaptation
, len
))
6415 * 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM)
6417 * Applications that wish to use the sendto() system call may wish to
6418 * specify a default set of parameters that would normally be supplied
6419 * through the inclusion of ancillary data. This socket option allows
6420 * such an application to set the default sctp_sndrcvinfo structure.
6423 * The application that wishes to use this socket option simply passes
6424 * in to this call the sctp_sndrcvinfo structure defined in Section
6425 * 5.2.2) The input parameters accepted by this call include
6426 * sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context,
6427 * sinfo_timetolive. The user must provide the sinfo_assoc_id field in
6428 * to this call if the caller is using the UDP model.
6430 * For getsockopt, it get the default sctp_sndrcvinfo structure.
6432 static int sctp_getsockopt_default_send_param(struct sock
*sk
,
6433 int len
, char __user
*optval
,
6436 struct sctp_sock
*sp
= sctp_sk(sk
);
6437 struct sctp_association
*asoc
;
6438 struct sctp_sndrcvinfo info
;
6440 if (len
< sizeof(info
))
6445 if (copy_from_user(&info
, optval
, len
))
6448 asoc
= sctp_id2assoc(sk
, info
.sinfo_assoc_id
);
6449 if (!asoc
&& info
.sinfo_assoc_id
!= SCTP_FUTURE_ASSOC
&&
6450 sctp_style(sk
, UDP
))
6454 info
.sinfo_stream
= asoc
->default_stream
;
6455 info
.sinfo_flags
= asoc
->default_flags
;
6456 info
.sinfo_ppid
= asoc
->default_ppid
;
6457 info
.sinfo_context
= asoc
->default_context
;
6458 info
.sinfo_timetolive
= asoc
->default_timetolive
;
6460 info
.sinfo_stream
= sp
->default_stream
;
6461 info
.sinfo_flags
= sp
->default_flags
;
6462 info
.sinfo_ppid
= sp
->default_ppid
;
6463 info
.sinfo_context
= sp
->default_context
;
6464 info
.sinfo_timetolive
= sp
->default_timetolive
;
6467 if (put_user(len
, optlen
))
6469 if (copy_to_user(optval
, &info
, len
))
6475 /* RFC6458, Section 8.1.31. Set/get Default Send Parameters
6476 * (SCTP_DEFAULT_SNDINFO)
6478 static int sctp_getsockopt_default_sndinfo(struct sock
*sk
, int len
,
6479 char __user
*optval
,
6482 struct sctp_sock
*sp
= sctp_sk(sk
);
6483 struct sctp_association
*asoc
;
6484 struct sctp_sndinfo info
;
6486 if (len
< sizeof(info
))
6491 if (copy_from_user(&info
, optval
, len
))
6494 asoc
= sctp_id2assoc(sk
, info
.snd_assoc_id
);
6495 if (!asoc
&& info
.snd_assoc_id
!= SCTP_FUTURE_ASSOC
&&
6496 sctp_style(sk
, UDP
))
6500 info
.snd_sid
= asoc
->default_stream
;
6501 info
.snd_flags
= asoc
->default_flags
;
6502 info
.snd_ppid
= asoc
->default_ppid
;
6503 info
.snd_context
= asoc
->default_context
;
6505 info
.snd_sid
= sp
->default_stream
;
6506 info
.snd_flags
= sp
->default_flags
;
6507 info
.snd_ppid
= sp
->default_ppid
;
6508 info
.snd_context
= sp
->default_context
;
6511 if (put_user(len
, optlen
))
6513 if (copy_to_user(optval
, &info
, len
))
6521 * 7.1.5 SCTP_NODELAY
6523 * Turn on/off any Nagle-like algorithm. This means that packets are
6524 * generally sent as soon as possible and no unnecessary delays are
6525 * introduced, at the cost of more packets in the network. Expects an
6526 * integer boolean flag.
6529 static int sctp_getsockopt_nodelay(struct sock
*sk
, int len
,
6530 char __user
*optval
, int __user
*optlen
)
6534 if (len
< sizeof(int))
6538 val
= (sctp_sk(sk
)->nodelay
== 1);
6539 if (put_user(len
, optlen
))
6541 if (copy_to_user(optval
, &val
, len
))
6548 * 7.1.1 SCTP_RTOINFO
6550 * The protocol parameters used to initialize and bound retransmission
6551 * timeout (RTO) are tunable. sctp_rtoinfo structure is used to access
6552 * and modify these parameters.
6553 * All parameters are time values, in milliseconds. A value of 0, when
6554 * modifying the parameters, indicates that the current value should not
6558 static int sctp_getsockopt_rtoinfo(struct sock
*sk
, int len
,
6559 char __user
*optval
,
6560 int __user
*optlen
) {
6561 struct sctp_rtoinfo rtoinfo
;
6562 struct sctp_association
*asoc
;
6564 if (len
< sizeof (struct sctp_rtoinfo
))
6567 len
= sizeof(struct sctp_rtoinfo
);
6569 if (copy_from_user(&rtoinfo
, optval
, len
))
6572 asoc
= sctp_id2assoc(sk
, rtoinfo
.srto_assoc_id
);
6574 if (!asoc
&& rtoinfo
.srto_assoc_id
!= SCTP_FUTURE_ASSOC
&&
6575 sctp_style(sk
, UDP
))
6578 /* Values corresponding to the specific association. */
6580 rtoinfo
.srto_initial
= jiffies_to_msecs(asoc
->rto_initial
);
6581 rtoinfo
.srto_max
= jiffies_to_msecs(asoc
->rto_max
);
6582 rtoinfo
.srto_min
= jiffies_to_msecs(asoc
->rto_min
);
6584 /* Values corresponding to the endpoint. */
6585 struct sctp_sock
*sp
= sctp_sk(sk
);
6587 rtoinfo
.srto_initial
= sp
->rtoinfo
.srto_initial
;
6588 rtoinfo
.srto_max
= sp
->rtoinfo
.srto_max
;
6589 rtoinfo
.srto_min
= sp
->rtoinfo
.srto_min
;
6592 if (put_user(len
, optlen
))
6595 if (copy_to_user(optval
, &rtoinfo
, len
))
6603 * 7.1.2 SCTP_ASSOCINFO
6605 * This option is used to tune the maximum retransmission attempts
6606 * of the association.
6607 * Returns an error if the new association retransmission value is
6608 * greater than the sum of the retransmission value of the peer.
6609 * See [SCTP] for more information.
6612 static int sctp_getsockopt_associnfo(struct sock
*sk
, int len
,
6613 char __user
*optval
,
6617 struct sctp_assocparams assocparams
;
6618 struct sctp_association
*asoc
;
6619 struct list_head
*pos
;
6622 if (len
< sizeof (struct sctp_assocparams
))
6625 len
= sizeof(struct sctp_assocparams
);
6627 if (copy_from_user(&assocparams
, optval
, len
))
6630 asoc
= sctp_id2assoc(sk
, assocparams
.sasoc_assoc_id
);
6632 if (!asoc
&& assocparams
.sasoc_assoc_id
!= SCTP_FUTURE_ASSOC
&&
6633 sctp_style(sk
, UDP
))
6636 /* Values correspoinding to the specific association */
6638 assocparams
.sasoc_asocmaxrxt
= asoc
->max_retrans
;
6639 assocparams
.sasoc_peer_rwnd
= asoc
->peer
.rwnd
;
6640 assocparams
.sasoc_local_rwnd
= asoc
->a_rwnd
;
6641 assocparams
.sasoc_cookie_life
= ktime_to_ms(asoc
->cookie_life
);
6643 list_for_each(pos
, &asoc
->peer
.transport_addr_list
) {
6647 assocparams
.sasoc_number_peer_destinations
= cnt
;
6649 /* Values corresponding to the endpoint */
6650 struct sctp_sock
*sp
= sctp_sk(sk
);
6652 assocparams
.sasoc_asocmaxrxt
= sp
->assocparams
.sasoc_asocmaxrxt
;
6653 assocparams
.sasoc_peer_rwnd
= sp
->assocparams
.sasoc_peer_rwnd
;
6654 assocparams
.sasoc_local_rwnd
= sp
->assocparams
.sasoc_local_rwnd
;
6655 assocparams
.sasoc_cookie_life
=
6656 sp
->assocparams
.sasoc_cookie_life
;
6657 assocparams
.sasoc_number_peer_destinations
=
6659 sasoc_number_peer_destinations
;
6662 if (put_user(len
, optlen
))
6665 if (copy_to_user(optval
, &assocparams
, len
))
6672 * 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR)
6674 * This socket option is a boolean flag which turns on or off mapped V4
6675 * addresses. If this option is turned on and the socket is type
6676 * PF_INET6, then IPv4 addresses will be mapped to V6 representation.
6677 * If this option is turned off, then no mapping will be done of V4
6678 * addresses and a user will receive both PF_INET6 and PF_INET type
6679 * addresses on the socket.
6681 static int sctp_getsockopt_mappedv4(struct sock
*sk
, int len
,
6682 char __user
*optval
, int __user
*optlen
)
6685 struct sctp_sock
*sp
= sctp_sk(sk
);
6687 if (len
< sizeof(int))
6692 if (put_user(len
, optlen
))
6694 if (copy_to_user(optval
, &val
, len
))
6701 * 7.1.29. Set or Get the default context (SCTP_CONTEXT)
6702 * (chapter and verse is quoted at sctp_setsockopt_context())
6704 static int sctp_getsockopt_context(struct sock
*sk
, int len
,
6705 char __user
*optval
, int __user
*optlen
)
6707 struct sctp_assoc_value params
;
6708 struct sctp_association
*asoc
;
6710 if (len
< sizeof(struct sctp_assoc_value
))
6713 len
= sizeof(struct sctp_assoc_value
);
6715 if (copy_from_user(¶ms
, optval
, len
))
6718 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
6719 if (!asoc
&& params
.assoc_id
!= SCTP_FUTURE_ASSOC
&&
6720 sctp_style(sk
, UDP
))
6723 params
.assoc_value
= asoc
? asoc
->default_rcv_context
6724 : sctp_sk(sk
)->default_rcv_context
;
6726 if (put_user(len
, optlen
))
6728 if (copy_to_user(optval
, ¶ms
, len
))
6735 * 8.1.16. Get or Set the Maximum Fragmentation Size (SCTP_MAXSEG)
6736 * This option will get or set the maximum size to put in any outgoing
6737 * SCTP DATA chunk. If a message is larger than this size it will be
6738 * fragmented by SCTP into the specified size. Note that the underlying
6739 * SCTP implementation may fragment into smaller sized chunks when the
6740 * PMTU of the underlying association is smaller than the value set by
6741 * the user. The default value for this option is '0' which indicates
6742 * the user is NOT limiting fragmentation and only the PMTU will effect
6743 * SCTP's choice of DATA chunk size. Note also that values set larger
6744 * than the maximum size of an IP datagram will effectively let SCTP
6745 * control fragmentation (i.e. the same as setting this option to 0).
6747 * The following structure is used to access and modify this parameter:
6749 * struct sctp_assoc_value {
6750 * sctp_assoc_t assoc_id;
6751 * uint32_t assoc_value;
6754 * assoc_id: This parameter is ignored for one-to-one style sockets.
6755 * For one-to-many style sockets this parameter indicates which
6756 * association the user is performing an action upon. Note that if
6757 * this field's value is zero then the endpoints default value is
6758 * changed (effecting future associations only).
6759 * assoc_value: This parameter specifies the maximum size in bytes.
6761 static int sctp_getsockopt_maxseg(struct sock
*sk
, int len
,
6762 char __user
*optval
, int __user
*optlen
)
6764 struct sctp_assoc_value params
;
6765 struct sctp_association
*asoc
;
6767 if (len
== sizeof(int)) {
6768 pr_warn_ratelimited(DEPRECATED
6770 "Use of int in maxseg socket option.\n"
6771 "Use struct sctp_assoc_value instead\n",
6772 current
->comm
, task_pid_nr(current
));
6773 params
.assoc_id
= SCTP_FUTURE_ASSOC
;
6774 } else if (len
>= sizeof(struct sctp_assoc_value
)) {
6775 len
= sizeof(struct sctp_assoc_value
);
6776 if (copy_from_user(¶ms
, optval
, len
))
6781 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
6782 if (!asoc
&& params
.assoc_id
!= SCTP_FUTURE_ASSOC
&&
6783 sctp_style(sk
, UDP
))
6787 params
.assoc_value
= asoc
->frag_point
;
6789 params
.assoc_value
= sctp_sk(sk
)->user_frag
;
6791 if (put_user(len
, optlen
))
6793 if (len
== sizeof(int)) {
6794 if (copy_to_user(optval
, ¶ms
.assoc_value
, len
))
6797 if (copy_to_user(optval
, ¶ms
, len
))
6805 * 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE)
6806 * (chapter and verse is quoted at sctp_setsockopt_fragment_interleave())
6808 static int sctp_getsockopt_fragment_interleave(struct sock
*sk
, int len
,
6809 char __user
*optval
, int __user
*optlen
)
6813 if (len
< sizeof(int))
6818 val
= sctp_sk(sk
)->frag_interleave
;
6819 if (put_user(len
, optlen
))
6821 if (copy_to_user(optval
, &val
, len
))
6828 * 7.1.25. Set or Get the sctp partial delivery point
6829 * (chapter and verse is quoted at sctp_setsockopt_partial_delivery_point())
6831 static int sctp_getsockopt_partial_delivery_point(struct sock
*sk
, int len
,
6832 char __user
*optval
,
6837 if (len
< sizeof(u32
))
6842 val
= sctp_sk(sk
)->pd_point
;
6843 if (put_user(len
, optlen
))
6845 if (copy_to_user(optval
, &val
, len
))
6852 * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST)
6853 * (chapter and verse is quoted at sctp_setsockopt_maxburst())
6855 static int sctp_getsockopt_maxburst(struct sock
*sk
, int len
,
6856 char __user
*optval
,
6859 struct sctp_assoc_value params
;
6860 struct sctp_association
*asoc
;
6862 if (len
== sizeof(int)) {
6863 pr_warn_ratelimited(DEPRECATED
6865 "Use of int in max_burst socket option.\n"
6866 "Use struct sctp_assoc_value instead\n",
6867 current
->comm
, task_pid_nr(current
));
6868 params
.assoc_id
= SCTP_FUTURE_ASSOC
;
6869 } else if (len
>= sizeof(struct sctp_assoc_value
)) {
6870 len
= sizeof(struct sctp_assoc_value
);
6871 if (copy_from_user(¶ms
, optval
, len
))
6876 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
6877 if (!asoc
&& params
.assoc_id
!= SCTP_FUTURE_ASSOC
&&
6878 sctp_style(sk
, UDP
))
6881 params
.assoc_value
= asoc
? asoc
->max_burst
: sctp_sk(sk
)->max_burst
;
6883 if (len
== sizeof(int)) {
6884 if (copy_to_user(optval
, ¶ms
.assoc_value
, len
))
6887 if (copy_to_user(optval
, ¶ms
, len
))
6895 static int sctp_getsockopt_hmac_ident(struct sock
*sk
, int len
,
6896 char __user
*optval
, int __user
*optlen
)
6898 struct sctp_endpoint
*ep
= sctp_sk(sk
)->ep
;
6899 struct sctp_hmacalgo __user
*p
= (void __user
*)optval
;
6900 struct sctp_hmac_algo_param
*hmacs
;
6905 if (!ep
->auth_enable
)
6908 hmacs
= ep
->auth_hmacs_list
;
6909 data_len
= ntohs(hmacs
->param_hdr
.length
) -
6910 sizeof(struct sctp_paramhdr
);
6912 if (len
< sizeof(struct sctp_hmacalgo
) + data_len
)
6915 len
= sizeof(struct sctp_hmacalgo
) + data_len
;
6916 num_idents
= data_len
/ sizeof(u16
);
6918 if (put_user(len
, optlen
))
6920 if (put_user(num_idents
, &p
->shmac_num_idents
))
6922 for (i
= 0; i
< num_idents
; i
++) {
6923 __u16 hmacid
= ntohs(hmacs
->hmac_ids
[i
]);
6925 if (copy_to_user(&p
->shmac_idents
[i
], &hmacid
, sizeof(__u16
)))
6931 static int sctp_getsockopt_active_key(struct sock
*sk
, int len
,
6932 char __user
*optval
, int __user
*optlen
)
6934 struct sctp_endpoint
*ep
= sctp_sk(sk
)->ep
;
6935 struct sctp_authkeyid val
;
6936 struct sctp_association
*asoc
;
6938 if (len
< sizeof(struct sctp_authkeyid
))
6941 len
= sizeof(struct sctp_authkeyid
);
6942 if (copy_from_user(&val
, optval
, len
))
6945 asoc
= sctp_id2assoc(sk
, val
.scact_assoc_id
);
6946 if (!asoc
&& val
.scact_assoc_id
&& sctp_style(sk
, UDP
))
6950 if (!asoc
->peer
.auth_capable
)
6952 val
.scact_keynumber
= asoc
->active_key_id
;
6954 if (!ep
->auth_enable
)
6956 val
.scact_keynumber
= ep
->active_key_id
;
6959 if (put_user(len
, optlen
))
6961 if (copy_to_user(optval
, &val
, len
))
6967 static int sctp_getsockopt_peer_auth_chunks(struct sock
*sk
, int len
,
6968 char __user
*optval
, int __user
*optlen
)
6970 struct sctp_authchunks __user
*p
= (void __user
*)optval
;
6971 struct sctp_authchunks val
;
6972 struct sctp_association
*asoc
;
6973 struct sctp_chunks_param
*ch
;
6977 if (len
< sizeof(struct sctp_authchunks
))
6980 if (copy_from_user(&val
, optval
, sizeof(val
)))
6983 to
= p
->gauth_chunks
;
6984 asoc
= sctp_id2assoc(sk
, val
.gauth_assoc_id
);
6988 if (!asoc
->peer
.auth_capable
)
6991 ch
= asoc
->peer
.peer_chunks
;
6995 /* See if the user provided enough room for all the data */
6996 num_chunks
= ntohs(ch
->param_hdr
.length
) - sizeof(struct sctp_paramhdr
);
6997 if (len
< num_chunks
)
7000 if (copy_to_user(to
, ch
->chunks
, num_chunks
))
7003 len
= sizeof(struct sctp_authchunks
) + num_chunks
;
7004 if (put_user(len
, optlen
))
7006 if (put_user(num_chunks
, &p
->gauth_number_of_chunks
))
7011 static int sctp_getsockopt_local_auth_chunks(struct sock
*sk
, int len
,
7012 char __user
*optval
, int __user
*optlen
)
7014 struct sctp_endpoint
*ep
= sctp_sk(sk
)->ep
;
7015 struct sctp_authchunks __user
*p
= (void __user
*)optval
;
7016 struct sctp_authchunks val
;
7017 struct sctp_association
*asoc
;
7018 struct sctp_chunks_param
*ch
;
7022 if (len
< sizeof(struct sctp_authchunks
))
7025 if (copy_from_user(&val
, optval
, sizeof(val
)))
7028 to
= p
->gauth_chunks
;
7029 asoc
= sctp_id2assoc(sk
, val
.gauth_assoc_id
);
7030 if (!asoc
&& val
.gauth_assoc_id
!= SCTP_FUTURE_ASSOC
&&
7031 sctp_style(sk
, UDP
))
7035 if (!asoc
->peer
.auth_capable
)
7037 ch
= (struct sctp_chunks_param
*)asoc
->c
.auth_chunks
;
7039 if (!ep
->auth_enable
)
7041 ch
= ep
->auth_chunk_list
;
7046 num_chunks
= ntohs(ch
->param_hdr
.length
) - sizeof(struct sctp_paramhdr
);
7047 if (len
< sizeof(struct sctp_authchunks
) + num_chunks
)
7050 if (copy_to_user(to
, ch
->chunks
, num_chunks
))
7053 len
= sizeof(struct sctp_authchunks
) + num_chunks
;
7054 if (put_user(len
, optlen
))
7056 if (put_user(num_chunks
, &p
->gauth_number_of_chunks
))
7063 * 8.2.5. Get the Current Number of Associations (SCTP_GET_ASSOC_NUMBER)
7064 * This option gets the current number of associations that are attached
7065 * to a one-to-many style socket. The option value is an uint32_t.
7067 static int sctp_getsockopt_assoc_number(struct sock
*sk
, int len
,
7068 char __user
*optval
, int __user
*optlen
)
7070 struct sctp_sock
*sp
= sctp_sk(sk
);
7071 struct sctp_association
*asoc
;
7074 if (sctp_style(sk
, TCP
))
7077 if (len
< sizeof(u32
))
7082 list_for_each_entry(asoc
, &(sp
->ep
->asocs
), asocs
) {
7086 if (put_user(len
, optlen
))
7088 if (copy_to_user(optval
, &val
, len
))
7095 * 8.1.23 SCTP_AUTO_ASCONF
7096 * See the corresponding setsockopt entry as description
7098 static int sctp_getsockopt_auto_asconf(struct sock
*sk
, int len
,
7099 char __user
*optval
, int __user
*optlen
)
7103 if (len
< sizeof(int))
7107 if (sctp_sk(sk
)->do_auto_asconf
&& sctp_is_ep_boundall(sk
))
7109 if (put_user(len
, optlen
))
7111 if (copy_to_user(optval
, &val
, len
))
7117 * 8.2.6. Get the Current Identifiers of Associations
7118 * (SCTP_GET_ASSOC_ID_LIST)
7120 * This option gets the current list of SCTP association identifiers of
7121 * the SCTP associations handled by a one-to-many style socket.
7123 static int sctp_getsockopt_assoc_ids(struct sock
*sk
, int len
,
7124 char __user
*optval
, int __user
*optlen
)
7126 struct sctp_sock
*sp
= sctp_sk(sk
);
7127 struct sctp_association
*asoc
;
7128 struct sctp_assoc_ids
*ids
;
7131 if (sctp_style(sk
, TCP
))
7134 if (len
< sizeof(struct sctp_assoc_ids
))
7137 list_for_each_entry(asoc
, &(sp
->ep
->asocs
), asocs
) {
7141 if (len
< sizeof(struct sctp_assoc_ids
) + sizeof(sctp_assoc_t
) * num
)
7144 len
= sizeof(struct sctp_assoc_ids
) + sizeof(sctp_assoc_t
) * num
;
7146 ids
= kmalloc(len
, GFP_USER
| __GFP_NOWARN
);
7150 ids
->gaids_number_of_ids
= num
;
7152 list_for_each_entry(asoc
, &(sp
->ep
->asocs
), asocs
) {
7153 ids
->gaids_assoc_id
[num
++] = asoc
->assoc_id
;
7156 if (put_user(len
, optlen
) || copy_to_user(optval
, ids
, len
)) {
7166 * SCTP_PEER_ADDR_THLDS
7168 * This option allows us to fetch the partially failed threshold for one or all
7169 * transports in an association. See Section 6.1 of:
7170 * http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txt
7172 static int sctp_getsockopt_paddr_thresholds(struct sock
*sk
,
7173 char __user
*optval
,
7177 struct sctp_paddrthlds val
;
7178 struct sctp_transport
*trans
;
7179 struct sctp_association
*asoc
;
7181 if (len
< sizeof(struct sctp_paddrthlds
))
7183 len
= sizeof(struct sctp_paddrthlds
);
7184 if (copy_from_user(&val
, (struct sctp_paddrthlds __user
*)optval
, len
))
7187 if (!sctp_is_any(sk
, (const union sctp_addr
*)&val
.spt_address
)) {
7188 trans
= sctp_addr_id2transport(sk
, &val
.spt_address
,
7193 val
.spt_pathmaxrxt
= trans
->pathmaxrxt
;
7194 val
.spt_pathpfthld
= trans
->pf_retrans
;
7199 asoc
= sctp_id2assoc(sk
, val
.spt_assoc_id
);
7200 if (!asoc
&& val
.spt_assoc_id
!= SCTP_FUTURE_ASSOC
&&
7201 sctp_style(sk
, UDP
))
7205 val
.spt_pathpfthld
= asoc
->pf_retrans
;
7206 val
.spt_pathmaxrxt
= asoc
->pathmaxrxt
;
7208 struct sctp_sock
*sp
= sctp_sk(sk
);
7210 val
.spt_pathpfthld
= sp
->pf_retrans
;
7211 val
.spt_pathmaxrxt
= sp
->pathmaxrxt
;
7215 if (put_user(len
, optlen
) || copy_to_user(optval
, &val
, len
))
7222 * SCTP_GET_ASSOC_STATS
7224 * This option retrieves local per endpoint statistics. It is modeled
7225 * after OpenSolaris' implementation
7227 static int sctp_getsockopt_assoc_stats(struct sock
*sk
, int len
,
7228 char __user
*optval
,
7231 struct sctp_assoc_stats sas
;
7232 struct sctp_association
*asoc
= NULL
;
7234 /* User must provide at least the assoc id */
7235 if (len
< sizeof(sctp_assoc_t
))
7238 /* Allow the struct to grow and fill in as much as possible */
7239 len
= min_t(size_t, len
, sizeof(sas
));
7241 if (copy_from_user(&sas
, optval
, len
))
7244 asoc
= sctp_id2assoc(sk
, sas
.sas_assoc_id
);
7248 sas
.sas_rtxchunks
= asoc
->stats
.rtxchunks
;
7249 sas
.sas_gapcnt
= asoc
->stats
.gapcnt
;
7250 sas
.sas_outofseqtsns
= asoc
->stats
.outofseqtsns
;
7251 sas
.sas_osacks
= asoc
->stats
.osacks
;
7252 sas
.sas_isacks
= asoc
->stats
.isacks
;
7253 sas
.sas_octrlchunks
= asoc
->stats
.octrlchunks
;
7254 sas
.sas_ictrlchunks
= asoc
->stats
.ictrlchunks
;
7255 sas
.sas_oodchunks
= asoc
->stats
.oodchunks
;
7256 sas
.sas_iodchunks
= asoc
->stats
.iodchunks
;
7257 sas
.sas_ouodchunks
= asoc
->stats
.ouodchunks
;
7258 sas
.sas_iuodchunks
= asoc
->stats
.iuodchunks
;
7259 sas
.sas_idupchunks
= asoc
->stats
.idupchunks
;
7260 sas
.sas_opackets
= asoc
->stats
.opackets
;
7261 sas
.sas_ipackets
= asoc
->stats
.ipackets
;
7263 /* New high max rto observed, will return 0 if not a single
7264 * RTO update took place. obs_rto_ipaddr will be bogus
7267 sas
.sas_maxrto
= asoc
->stats
.max_obs_rto
;
7268 memcpy(&sas
.sas_obs_rto_ipaddr
, &asoc
->stats
.obs_rto_ipaddr
,
7269 sizeof(struct sockaddr_storage
));
7271 /* Mark beginning of a new observation period */
7272 asoc
->stats
.max_obs_rto
= asoc
->rto_min
;
7274 if (put_user(len
, optlen
))
7277 pr_debug("%s: len:%d, assoc_id:%d\n", __func__
, len
, sas
.sas_assoc_id
);
7279 if (copy_to_user(optval
, &sas
, len
))
7285 static int sctp_getsockopt_recvrcvinfo(struct sock
*sk
, int len
,
7286 char __user
*optval
,
7291 if (len
< sizeof(int))
7295 if (sctp_sk(sk
)->recvrcvinfo
)
7297 if (put_user(len
, optlen
))
7299 if (copy_to_user(optval
, &val
, len
))
7305 static int sctp_getsockopt_recvnxtinfo(struct sock
*sk
, int len
,
7306 char __user
*optval
,
7311 if (len
< sizeof(int))
7315 if (sctp_sk(sk
)->recvnxtinfo
)
7317 if (put_user(len
, optlen
))
7319 if (copy_to_user(optval
, &val
, len
))
7325 static int sctp_getsockopt_pr_supported(struct sock
*sk
, int len
,
7326 char __user
*optval
,
7329 struct sctp_assoc_value params
;
7330 struct sctp_association
*asoc
;
7331 int retval
= -EFAULT
;
7333 if (len
< sizeof(params
)) {
7338 len
= sizeof(params
);
7339 if (copy_from_user(¶ms
, optval
, len
))
7342 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
7343 if (!asoc
&& params
.assoc_id
!= SCTP_FUTURE_ASSOC
&&
7344 sctp_style(sk
, UDP
)) {
7349 params
.assoc_value
= asoc
? asoc
->peer
.prsctp_capable
7350 : sctp_sk(sk
)->ep
->prsctp_enable
;
7352 if (put_user(len
, optlen
))
7355 if (copy_to_user(optval
, ¶ms
, len
))
7364 static int sctp_getsockopt_default_prinfo(struct sock
*sk
, int len
,
7365 char __user
*optval
,
7368 struct sctp_default_prinfo info
;
7369 struct sctp_association
*asoc
;
7370 int retval
= -EFAULT
;
7372 if (len
< sizeof(info
)) {
7378 if (copy_from_user(&info
, optval
, len
))
7381 asoc
= sctp_id2assoc(sk
, info
.pr_assoc_id
);
7382 if (!asoc
&& info
.pr_assoc_id
!= SCTP_FUTURE_ASSOC
&&
7383 sctp_style(sk
, UDP
)) {
7389 info
.pr_policy
= SCTP_PR_POLICY(asoc
->default_flags
);
7390 info
.pr_value
= asoc
->default_timetolive
;
7392 struct sctp_sock
*sp
= sctp_sk(sk
);
7394 info
.pr_policy
= SCTP_PR_POLICY(sp
->default_flags
);
7395 info
.pr_value
= sp
->default_timetolive
;
7398 if (put_user(len
, optlen
))
7401 if (copy_to_user(optval
, &info
, len
))
7410 static int sctp_getsockopt_pr_assocstatus(struct sock
*sk
, int len
,
7411 char __user
*optval
,
7414 struct sctp_prstatus params
;
7415 struct sctp_association
*asoc
;
7417 int retval
= -EINVAL
;
7419 if (len
< sizeof(params
))
7422 len
= sizeof(params
);
7423 if (copy_from_user(¶ms
, optval
, len
)) {
7428 policy
= params
.sprstat_policy
;
7429 if (!policy
|| (policy
& ~(SCTP_PR_SCTP_MASK
| SCTP_PR_SCTP_ALL
)) ||
7430 ((policy
& SCTP_PR_SCTP_ALL
) && (policy
& SCTP_PR_SCTP_MASK
)))
7433 asoc
= sctp_id2assoc(sk
, params
.sprstat_assoc_id
);
7437 if (policy
== SCTP_PR_SCTP_ALL
) {
7438 params
.sprstat_abandoned_unsent
= 0;
7439 params
.sprstat_abandoned_sent
= 0;
7440 for (policy
= 0; policy
<= SCTP_PR_INDEX(MAX
); policy
++) {
7441 params
.sprstat_abandoned_unsent
+=
7442 asoc
->abandoned_unsent
[policy
];
7443 params
.sprstat_abandoned_sent
+=
7444 asoc
->abandoned_sent
[policy
];
7447 params
.sprstat_abandoned_unsent
=
7448 asoc
->abandoned_unsent
[__SCTP_PR_INDEX(policy
)];
7449 params
.sprstat_abandoned_sent
=
7450 asoc
->abandoned_sent
[__SCTP_PR_INDEX(policy
)];
7453 if (put_user(len
, optlen
)) {
7458 if (copy_to_user(optval
, ¶ms
, len
)) {
7469 static int sctp_getsockopt_pr_streamstatus(struct sock
*sk
, int len
,
7470 char __user
*optval
,
7473 struct sctp_stream_out_ext
*streamoute
;
7474 struct sctp_association
*asoc
;
7475 struct sctp_prstatus params
;
7476 int retval
= -EINVAL
;
7479 if (len
< sizeof(params
))
7482 len
= sizeof(params
);
7483 if (copy_from_user(¶ms
, optval
, len
)) {
7488 policy
= params
.sprstat_policy
;
7489 if (!policy
|| (policy
& ~(SCTP_PR_SCTP_MASK
| SCTP_PR_SCTP_ALL
)) ||
7490 ((policy
& SCTP_PR_SCTP_ALL
) && (policy
& SCTP_PR_SCTP_MASK
)))
7493 asoc
= sctp_id2assoc(sk
, params
.sprstat_assoc_id
);
7494 if (!asoc
|| params
.sprstat_sid
>= asoc
->stream
.outcnt
)
7497 streamoute
= SCTP_SO(&asoc
->stream
, params
.sprstat_sid
)->ext
;
7499 /* Not allocated yet, means all stats are 0 */
7500 params
.sprstat_abandoned_unsent
= 0;
7501 params
.sprstat_abandoned_sent
= 0;
7506 if (policy
== SCTP_PR_SCTP_ALL
) {
7507 params
.sprstat_abandoned_unsent
= 0;
7508 params
.sprstat_abandoned_sent
= 0;
7509 for (policy
= 0; policy
<= SCTP_PR_INDEX(MAX
); policy
++) {
7510 params
.sprstat_abandoned_unsent
+=
7511 streamoute
->abandoned_unsent
[policy
];
7512 params
.sprstat_abandoned_sent
+=
7513 streamoute
->abandoned_sent
[policy
];
7516 params
.sprstat_abandoned_unsent
=
7517 streamoute
->abandoned_unsent
[__SCTP_PR_INDEX(policy
)];
7518 params
.sprstat_abandoned_sent
=
7519 streamoute
->abandoned_sent
[__SCTP_PR_INDEX(policy
)];
7522 if (put_user(len
, optlen
) || copy_to_user(optval
, ¶ms
, len
)) {
7533 static int sctp_getsockopt_reconfig_supported(struct sock
*sk
, int len
,
7534 char __user
*optval
,
7537 struct sctp_assoc_value params
;
7538 struct sctp_association
*asoc
;
7539 int retval
= -EFAULT
;
7541 if (len
< sizeof(params
)) {
7546 len
= sizeof(params
);
7547 if (copy_from_user(¶ms
, optval
, len
))
7550 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
7551 if (!asoc
&& params
.assoc_id
!= SCTP_FUTURE_ASSOC
&&
7552 sctp_style(sk
, UDP
)) {
7557 params
.assoc_value
= asoc
? asoc
->peer
.reconf_capable
7558 : sctp_sk(sk
)->ep
->reconf_enable
;
7560 if (put_user(len
, optlen
))
7563 if (copy_to_user(optval
, ¶ms
, len
))
7572 static int sctp_getsockopt_enable_strreset(struct sock
*sk
, int len
,
7573 char __user
*optval
,
7576 struct sctp_assoc_value params
;
7577 struct sctp_association
*asoc
;
7578 int retval
= -EFAULT
;
7580 if (len
< sizeof(params
)) {
7585 len
= sizeof(params
);
7586 if (copy_from_user(¶ms
, optval
, len
))
7589 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
7590 if (!asoc
&& params
.assoc_id
!= SCTP_FUTURE_ASSOC
&&
7591 sctp_style(sk
, UDP
)) {
7596 params
.assoc_value
= asoc
? asoc
->strreset_enable
7597 : sctp_sk(sk
)->ep
->strreset_enable
;
7599 if (put_user(len
, optlen
))
7602 if (copy_to_user(optval
, ¶ms
, len
))
7611 static int sctp_getsockopt_scheduler(struct sock
*sk
, int len
,
7612 char __user
*optval
,
7615 struct sctp_assoc_value params
;
7616 struct sctp_association
*asoc
;
7617 int retval
= -EFAULT
;
7619 if (len
< sizeof(params
)) {
7624 len
= sizeof(params
);
7625 if (copy_from_user(¶ms
, optval
, len
))
7628 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
7629 if (!asoc
&& params
.assoc_id
!= SCTP_FUTURE_ASSOC
&&
7630 sctp_style(sk
, UDP
)) {
7635 params
.assoc_value
= asoc
? sctp_sched_get_sched(asoc
)
7636 : sctp_sk(sk
)->default_ss
;
7638 if (put_user(len
, optlen
))
7641 if (copy_to_user(optval
, ¶ms
, len
))
7650 static int sctp_getsockopt_scheduler_value(struct sock
*sk
, int len
,
7651 char __user
*optval
,
7654 struct sctp_stream_value params
;
7655 struct sctp_association
*asoc
;
7656 int retval
= -EFAULT
;
7658 if (len
< sizeof(params
)) {
7663 len
= sizeof(params
);
7664 if (copy_from_user(¶ms
, optval
, len
))
7667 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
7673 retval
= sctp_sched_get_value(asoc
, params
.stream_id
,
7674 ¶ms
.stream_value
);
7678 if (put_user(len
, optlen
)) {
7683 if (copy_to_user(optval
, ¶ms
, len
)) {
7692 static int sctp_getsockopt_interleaving_supported(struct sock
*sk
, int len
,
7693 char __user
*optval
,
7696 struct sctp_assoc_value params
;
7697 struct sctp_association
*asoc
;
7698 int retval
= -EFAULT
;
7700 if (len
< sizeof(params
)) {
7705 len
= sizeof(params
);
7706 if (copy_from_user(¶ms
, optval
, len
))
7709 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
7710 if (!asoc
&& params
.assoc_id
!= SCTP_FUTURE_ASSOC
&&
7711 sctp_style(sk
, UDP
)) {
7716 params
.assoc_value
= asoc
? asoc
->peer
.intl_capable
7717 : sctp_sk(sk
)->ep
->intl_enable
;
7719 if (put_user(len
, optlen
))
7722 if (copy_to_user(optval
, ¶ms
, len
))
7731 static int sctp_getsockopt_reuse_port(struct sock
*sk
, int len
,
7732 char __user
*optval
,
7737 if (len
< sizeof(int))
7741 val
= sctp_sk(sk
)->reuse
;
7742 if (put_user(len
, optlen
))
7745 if (copy_to_user(optval
, &val
, len
))
7751 static int sctp_getsockopt_event(struct sock
*sk
, int len
, char __user
*optval
,
7754 struct sctp_association
*asoc
;
7755 struct sctp_event param
;
7758 if (len
< sizeof(param
))
7761 len
= sizeof(param
);
7762 if (copy_from_user(¶m
, optval
, len
))
7765 if (param
.se_type
< SCTP_SN_TYPE_BASE
||
7766 param
.se_type
> SCTP_SN_TYPE_MAX
)
7769 asoc
= sctp_id2assoc(sk
, param
.se_assoc_id
);
7770 if (!asoc
&& param
.se_assoc_id
!= SCTP_FUTURE_ASSOC
&&
7771 sctp_style(sk
, UDP
))
7774 subscribe
= asoc
? asoc
->subscribe
: sctp_sk(sk
)->subscribe
;
7775 param
.se_on
= sctp_ulpevent_type_enabled(subscribe
, param
.se_type
);
7777 if (put_user(len
, optlen
))
7780 if (copy_to_user(optval
, ¶m
, len
))
7786 static int sctp_getsockopt_asconf_supported(struct sock
*sk
, int len
,
7787 char __user
*optval
,
7790 struct sctp_assoc_value params
;
7791 struct sctp_association
*asoc
;
7792 int retval
= -EFAULT
;
7794 if (len
< sizeof(params
)) {
7799 len
= sizeof(params
);
7800 if (copy_from_user(¶ms
, optval
, len
))
7803 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
7804 if (!asoc
&& params
.assoc_id
!= SCTP_FUTURE_ASSOC
&&
7805 sctp_style(sk
, UDP
)) {
7810 params
.assoc_value
= asoc
? asoc
->peer
.asconf_capable
7811 : sctp_sk(sk
)->ep
->asconf_enable
;
7813 if (put_user(len
, optlen
))
7816 if (copy_to_user(optval
, ¶ms
, len
))
7825 static int sctp_getsockopt_auth_supported(struct sock
*sk
, int len
,
7826 char __user
*optval
,
7829 struct sctp_assoc_value params
;
7830 struct sctp_association
*asoc
;
7831 int retval
= -EFAULT
;
7833 if (len
< sizeof(params
)) {
7838 len
= sizeof(params
);
7839 if (copy_from_user(¶ms
, optval
, len
))
7842 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
7843 if (!asoc
&& params
.assoc_id
!= SCTP_FUTURE_ASSOC
&&
7844 sctp_style(sk
, UDP
)) {
7849 params
.assoc_value
= asoc
? asoc
->peer
.auth_capable
7850 : sctp_sk(sk
)->ep
->auth_enable
;
7852 if (put_user(len
, optlen
))
7855 if (copy_to_user(optval
, ¶ms
, len
))
7864 static int sctp_getsockopt_ecn_supported(struct sock
*sk
, int len
,
7865 char __user
*optval
,
7868 struct sctp_assoc_value params
;
7869 struct sctp_association
*asoc
;
7870 int retval
= -EFAULT
;
7872 if (len
< sizeof(params
)) {
7877 len
= sizeof(params
);
7878 if (copy_from_user(¶ms
, optval
, len
))
7881 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
7882 if (!asoc
&& params
.assoc_id
!= SCTP_FUTURE_ASSOC
&&
7883 sctp_style(sk
, UDP
)) {
7888 params
.assoc_value
= asoc
? asoc
->peer
.ecn_capable
7889 : sctp_sk(sk
)->ep
->ecn_enable
;
7891 if (put_user(len
, optlen
))
7894 if (copy_to_user(optval
, ¶ms
, len
))
7903 static int sctp_getsockopt(struct sock
*sk
, int level
, int optname
,
7904 char __user
*optval
, int __user
*optlen
)
7909 pr_debug("%s: sk:%p, optname:%d\n", __func__
, sk
, optname
);
7911 /* I can hardly begin to describe how wrong this is. This is
7912 * so broken as to be worse than useless. The API draft
7913 * REALLY is NOT helpful here... I am not convinced that the
7914 * semantics of getsockopt() with a level OTHER THAN SOL_SCTP
7915 * are at all well-founded.
7917 if (level
!= SOL_SCTP
) {
7918 struct sctp_af
*af
= sctp_sk(sk
)->pf
->af
;
7920 retval
= af
->getsockopt(sk
, level
, optname
, optval
, optlen
);
7924 if (get_user(len
, optlen
))
7934 retval
= sctp_getsockopt_sctp_status(sk
, len
, optval
, optlen
);
7936 case SCTP_DISABLE_FRAGMENTS
:
7937 retval
= sctp_getsockopt_disable_fragments(sk
, len
, optval
,
7941 retval
= sctp_getsockopt_events(sk
, len
, optval
, optlen
);
7943 case SCTP_AUTOCLOSE
:
7944 retval
= sctp_getsockopt_autoclose(sk
, len
, optval
, optlen
);
7946 case SCTP_SOCKOPT_PEELOFF
:
7947 retval
= sctp_getsockopt_peeloff(sk
, len
, optval
, optlen
);
7949 case SCTP_SOCKOPT_PEELOFF_FLAGS
:
7950 retval
= sctp_getsockopt_peeloff_flags(sk
, len
, optval
, optlen
);
7952 case SCTP_PEER_ADDR_PARAMS
:
7953 retval
= sctp_getsockopt_peer_addr_params(sk
, len
, optval
,
7956 case SCTP_DELAYED_SACK
:
7957 retval
= sctp_getsockopt_delayed_ack(sk
, len
, optval
,
7961 retval
= sctp_getsockopt_initmsg(sk
, len
, optval
, optlen
);
7963 case SCTP_GET_PEER_ADDRS
:
7964 retval
= sctp_getsockopt_peer_addrs(sk
, len
, optval
,
7967 case SCTP_GET_LOCAL_ADDRS
:
7968 retval
= sctp_getsockopt_local_addrs(sk
, len
, optval
,
7971 case SCTP_SOCKOPT_CONNECTX3
:
7972 retval
= sctp_getsockopt_connectx3(sk
, len
, optval
, optlen
);
7974 case SCTP_DEFAULT_SEND_PARAM
:
7975 retval
= sctp_getsockopt_default_send_param(sk
, len
,
7978 case SCTP_DEFAULT_SNDINFO
:
7979 retval
= sctp_getsockopt_default_sndinfo(sk
, len
,
7982 case SCTP_PRIMARY_ADDR
:
7983 retval
= sctp_getsockopt_primary_addr(sk
, len
, optval
, optlen
);
7986 retval
= sctp_getsockopt_nodelay(sk
, len
, optval
, optlen
);
7989 retval
= sctp_getsockopt_rtoinfo(sk
, len
, optval
, optlen
);
7991 case SCTP_ASSOCINFO
:
7992 retval
= sctp_getsockopt_associnfo(sk
, len
, optval
, optlen
);
7994 case SCTP_I_WANT_MAPPED_V4_ADDR
:
7995 retval
= sctp_getsockopt_mappedv4(sk
, len
, optval
, optlen
);
7998 retval
= sctp_getsockopt_maxseg(sk
, len
, optval
, optlen
);
8000 case SCTP_GET_PEER_ADDR_INFO
:
8001 retval
= sctp_getsockopt_peer_addr_info(sk
, len
, optval
,
8004 case SCTP_ADAPTATION_LAYER
:
8005 retval
= sctp_getsockopt_adaptation_layer(sk
, len
, optval
,
8009 retval
= sctp_getsockopt_context(sk
, len
, optval
, optlen
);
8011 case SCTP_FRAGMENT_INTERLEAVE
:
8012 retval
= sctp_getsockopt_fragment_interleave(sk
, len
, optval
,
8015 case SCTP_PARTIAL_DELIVERY_POINT
:
8016 retval
= sctp_getsockopt_partial_delivery_point(sk
, len
, optval
,
8019 case SCTP_MAX_BURST
:
8020 retval
= sctp_getsockopt_maxburst(sk
, len
, optval
, optlen
);
8023 case SCTP_AUTH_CHUNK
:
8024 case SCTP_AUTH_DELETE_KEY
:
8025 case SCTP_AUTH_DEACTIVATE_KEY
:
8026 retval
= -EOPNOTSUPP
;
8028 case SCTP_HMAC_IDENT
:
8029 retval
= sctp_getsockopt_hmac_ident(sk
, len
, optval
, optlen
);
8031 case SCTP_AUTH_ACTIVE_KEY
:
8032 retval
= sctp_getsockopt_active_key(sk
, len
, optval
, optlen
);
8034 case SCTP_PEER_AUTH_CHUNKS
:
8035 retval
= sctp_getsockopt_peer_auth_chunks(sk
, len
, optval
,
8038 case SCTP_LOCAL_AUTH_CHUNKS
:
8039 retval
= sctp_getsockopt_local_auth_chunks(sk
, len
, optval
,
8042 case SCTP_GET_ASSOC_NUMBER
:
8043 retval
= sctp_getsockopt_assoc_number(sk
, len
, optval
, optlen
);
8045 case SCTP_GET_ASSOC_ID_LIST
:
8046 retval
= sctp_getsockopt_assoc_ids(sk
, len
, optval
, optlen
);
8048 case SCTP_AUTO_ASCONF
:
8049 retval
= sctp_getsockopt_auto_asconf(sk
, len
, optval
, optlen
);
8051 case SCTP_PEER_ADDR_THLDS
:
8052 retval
= sctp_getsockopt_paddr_thresholds(sk
, optval
, len
, optlen
);
8054 case SCTP_GET_ASSOC_STATS
:
8055 retval
= sctp_getsockopt_assoc_stats(sk
, len
, optval
, optlen
);
8057 case SCTP_RECVRCVINFO
:
8058 retval
= sctp_getsockopt_recvrcvinfo(sk
, len
, optval
, optlen
);
8060 case SCTP_RECVNXTINFO
:
8061 retval
= sctp_getsockopt_recvnxtinfo(sk
, len
, optval
, optlen
);
8063 case SCTP_PR_SUPPORTED
:
8064 retval
= sctp_getsockopt_pr_supported(sk
, len
, optval
, optlen
);
8066 case SCTP_DEFAULT_PRINFO
:
8067 retval
= sctp_getsockopt_default_prinfo(sk
, len
, optval
,
8070 case SCTP_PR_ASSOC_STATUS
:
8071 retval
= sctp_getsockopt_pr_assocstatus(sk
, len
, optval
,
8074 case SCTP_PR_STREAM_STATUS
:
8075 retval
= sctp_getsockopt_pr_streamstatus(sk
, len
, optval
,
8078 case SCTP_RECONFIG_SUPPORTED
:
8079 retval
= sctp_getsockopt_reconfig_supported(sk
, len
, optval
,
8082 case SCTP_ENABLE_STREAM_RESET
:
8083 retval
= sctp_getsockopt_enable_strreset(sk
, len
, optval
,
8086 case SCTP_STREAM_SCHEDULER
:
8087 retval
= sctp_getsockopt_scheduler(sk
, len
, optval
,
8090 case SCTP_STREAM_SCHEDULER_VALUE
:
8091 retval
= sctp_getsockopt_scheduler_value(sk
, len
, optval
,
8094 case SCTP_INTERLEAVING_SUPPORTED
:
8095 retval
= sctp_getsockopt_interleaving_supported(sk
, len
, optval
,
8098 case SCTP_REUSE_PORT
:
8099 retval
= sctp_getsockopt_reuse_port(sk
, len
, optval
, optlen
);
8102 retval
= sctp_getsockopt_event(sk
, len
, optval
, optlen
);
8104 case SCTP_ASCONF_SUPPORTED
:
8105 retval
= sctp_getsockopt_asconf_supported(sk
, len
, optval
,
8108 case SCTP_AUTH_SUPPORTED
:
8109 retval
= sctp_getsockopt_auth_supported(sk
, len
, optval
,
8112 case SCTP_ECN_SUPPORTED
:
8113 retval
= sctp_getsockopt_ecn_supported(sk
, len
, optval
, optlen
);
8116 retval
= -ENOPROTOOPT
;
8124 static int sctp_hash(struct sock
*sk
)
8130 static void sctp_unhash(struct sock
*sk
)
8135 /* Check if port is acceptable. Possibly find first available port.
8137 * The port hash table (contained in the 'global' SCTP protocol storage
8138 * returned by struct sctp_protocol *sctp_get_protocol()). The hash
8139 * table is an array of 4096 lists (sctp_bind_hashbucket). Each
8140 * list (the list number is the port number hashed out, so as you
8141 * would expect from a hash function, all the ports in a given list have
8142 * such a number that hashes out to the same list number; you were
8143 * expecting that, right?); so each list has a set of ports, with a
8144 * link to the socket (struct sock) that uses it, the port number and
8145 * a fastreuse flag (FIXME: NPI ipg).
8147 static struct sctp_bind_bucket
*sctp_bucket_create(
8148 struct sctp_bind_hashbucket
*head
, struct net
*, unsigned short snum
);
8150 static int sctp_get_port_local(struct sock
*sk
, union sctp_addr
*addr
)
8152 struct sctp_sock
*sp
= sctp_sk(sk
);
8153 bool reuse
= (sk
->sk_reuse
|| sp
->reuse
);
8154 struct sctp_bind_hashbucket
*head
; /* hash list */
8155 kuid_t uid
= sock_i_uid(sk
);
8156 struct sctp_bind_bucket
*pp
;
8157 unsigned short snum
;
8160 snum
= ntohs(addr
->v4
.sin_port
);
8162 pr_debug("%s: begins, snum:%d\n", __func__
, snum
);
8167 /* Search for an available port. */
8168 int low
, high
, remaining
, index
;
8170 struct net
*net
= sock_net(sk
);
8172 inet_get_local_port_range(net
, &low
, &high
);
8173 remaining
= (high
- low
) + 1;
8174 rover
= prandom_u32() % remaining
+ low
;
8178 if ((rover
< low
) || (rover
> high
))
8180 if (inet_is_local_reserved_port(net
, rover
))
8182 index
= sctp_phashfn(sock_net(sk
), rover
);
8183 head
= &sctp_port_hashtable
[index
];
8184 spin_lock(&head
->lock
);
8185 sctp_for_each_hentry(pp
, &head
->chain
)
8186 if ((pp
->port
== rover
) &&
8187 net_eq(sock_net(sk
), pp
->net
))
8191 spin_unlock(&head
->lock
);
8192 } while (--remaining
> 0);
8194 /* Exhausted local port range during search? */
8199 /* OK, here is the one we will use. HEAD (the port
8200 * hash table list entry) is non-NULL and we hold it's
8205 /* We are given an specific port number; we verify
8206 * that it is not being used. If it is used, we will
8207 * exahust the search in the hash list corresponding
8208 * to the port number (snum) - we detect that with the
8209 * port iterator, pp being NULL.
8211 head
= &sctp_port_hashtable
[sctp_phashfn(sock_net(sk
), snum
)];
8212 spin_lock(&head
->lock
);
8213 sctp_for_each_hentry(pp
, &head
->chain
) {
8214 if ((pp
->port
== snum
) && net_eq(pp
->net
, sock_net(sk
)))
8221 if (!hlist_empty(&pp
->owner
)) {
8222 /* We had a port hash table hit - there is an
8223 * available port (pp != NULL) and it is being
8224 * used by other socket (pp->owner not empty); that other
8225 * socket is going to be sk2.
8229 pr_debug("%s: found a possible match\n", __func__
);
8231 if ((pp
->fastreuse
&& reuse
&&
8232 sk
->sk_state
!= SCTP_SS_LISTENING
) ||
8233 (pp
->fastreuseport
&& sk
->sk_reuseport
&&
8234 uid_eq(pp
->fastuid
, uid
)))
8237 /* Run through the list of sockets bound to the port
8238 * (pp->port) [via the pointers bind_next and
8239 * bind_pprev in the struct sock *sk2 (pp->sk)]. On each one,
8240 * we get the endpoint they describe and run through
8241 * the endpoint's list of IP (v4 or v6) addresses,
8242 * comparing each of the addresses with the address of
8243 * the socket sk. If we find a match, then that means
8244 * that this port/socket (sk) combination are already
8247 sk_for_each_bound(sk2
, &pp
->owner
) {
8248 struct sctp_sock
*sp2
= sctp_sk(sk2
);
8249 struct sctp_endpoint
*ep2
= sp2
->ep
;
8252 (reuse
&& (sk2
->sk_reuse
|| sp2
->reuse
) &&
8253 sk2
->sk_state
!= SCTP_SS_LISTENING
) ||
8254 (sk
->sk_reuseport
&& sk2
->sk_reuseport
&&
8255 uid_eq(uid
, sock_i_uid(sk2
))))
8258 if (sctp_bind_addr_conflict(&ep2
->base
.bind_addr
,
8265 pr_debug("%s: found a match\n", __func__
);
8268 /* If there was a hash table miss, create a new port. */
8270 if (!pp
&& !(pp
= sctp_bucket_create(head
, sock_net(sk
), snum
)))
8273 /* In either case (hit or miss), make sure fastreuse is 1 only
8274 * if sk->sk_reuse is too (that is, if the caller requested
8275 * SO_REUSEADDR on this socket -sk-).
8277 if (hlist_empty(&pp
->owner
)) {
8278 if (reuse
&& sk
->sk_state
!= SCTP_SS_LISTENING
)
8283 if (sk
->sk_reuseport
) {
8284 pp
->fastreuseport
= 1;
8287 pp
->fastreuseport
= 0;
8290 if (pp
->fastreuse
&&
8291 (!reuse
|| sk
->sk_state
== SCTP_SS_LISTENING
))
8294 if (pp
->fastreuseport
&&
8295 (!sk
->sk_reuseport
|| !uid_eq(pp
->fastuid
, uid
)))
8296 pp
->fastreuseport
= 0;
8299 /* We are set, so fill up all the data in the hash table
8300 * entry, tie the socket list information with the rest of the
8301 * sockets FIXME: Blurry, NPI (ipg).
8304 if (!sp
->bind_hash
) {
8305 inet_sk(sk
)->inet_num
= snum
;
8306 sk_add_bind_node(sk
, &pp
->owner
);
8312 spin_unlock(&head
->lock
);
8319 /* Assign a 'snum' port to the socket. If snum == 0, an ephemeral
8320 * port is requested.
8322 static int sctp_get_port(struct sock
*sk
, unsigned short snum
)
8324 union sctp_addr addr
;
8325 struct sctp_af
*af
= sctp_sk(sk
)->pf
->af
;
8327 /* Set up a dummy address struct from the sk. */
8328 af
->from_sk(&addr
, sk
);
8329 addr
.v4
.sin_port
= htons(snum
);
8331 /* Note: sk->sk_num gets filled in if ephemeral port request. */
8332 return sctp_get_port_local(sk
, &addr
);
8336 * Move a socket to LISTENING state.
8338 static int sctp_listen_start(struct sock
*sk
, int backlog
)
8340 struct sctp_sock
*sp
= sctp_sk(sk
);
8341 struct sctp_endpoint
*ep
= sp
->ep
;
8342 struct crypto_shash
*tfm
= NULL
;
8345 /* Allocate HMAC for generating cookie. */
8346 if (!sp
->hmac
&& sp
->sctp_hmac_alg
) {
8347 sprintf(alg
, "hmac(%s)", sp
->sctp_hmac_alg
);
8348 tfm
= crypto_alloc_shash(alg
, 0, 0);
8350 net_info_ratelimited("failed to load transform for %s: %ld\n",
8351 sp
->sctp_hmac_alg
, PTR_ERR(tfm
));
8354 sctp_sk(sk
)->hmac
= tfm
;
8358 * If a bind() or sctp_bindx() is not called prior to a listen()
8359 * call that allows new associations to be accepted, the system
8360 * picks an ephemeral port and will choose an address set equivalent
8361 * to binding with a wildcard address.
8363 * This is not currently spelled out in the SCTP sockets
8364 * extensions draft, but follows the practice as seen in TCP
8368 inet_sk_set_state(sk
, SCTP_SS_LISTENING
);
8369 if (!ep
->base
.bind_addr
.port
) {
8370 if (sctp_autobind(sk
))
8373 if (sctp_get_port(sk
, inet_sk(sk
)->inet_num
)) {
8374 inet_sk_set_state(sk
, SCTP_SS_CLOSED
);
8379 sk
->sk_max_ack_backlog
= backlog
;
8380 return sctp_hash_endpoint(ep
);
8384 * 4.1.3 / 5.1.3 listen()
8386 * By default, new associations are not accepted for UDP style sockets.
8387 * An application uses listen() to mark a socket as being able to
8388 * accept new associations.
8390 * On TCP style sockets, applications use listen() to ready the SCTP
8391 * endpoint for accepting inbound associations.
8393 * On both types of endpoints a backlog of '0' disables listening.
8395 * Move a socket to LISTENING state.
8397 int sctp_inet_listen(struct socket
*sock
, int backlog
)
8399 struct sock
*sk
= sock
->sk
;
8400 struct sctp_endpoint
*ep
= sctp_sk(sk
)->ep
;
8403 if (unlikely(backlog
< 0))
8408 /* Peeled-off sockets are not allowed to listen(). */
8409 if (sctp_style(sk
, UDP_HIGH_BANDWIDTH
))
8412 if (sock
->state
!= SS_UNCONNECTED
)
8415 if (!sctp_sstate(sk
, LISTENING
) && !sctp_sstate(sk
, CLOSED
))
8418 /* If backlog is zero, disable listening. */
8420 if (sctp_sstate(sk
, CLOSED
))
8424 sctp_unhash_endpoint(ep
);
8425 sk
->sk_state
= SCTP_SS_CLOSED
;
8426 if (sk
->sk_reuse
|| sctp_sk(sk
)->reuse
)
8427 sctp_sk(sk
)->bind_hash
->fastreuse
= 1;
8431 /* If we are already listening, just update the backlog */
8432 if (sctp_sstate(sk
, LISTENING
))
8433 sk
->sk_max_ack_backlog
= backlog
;
8435 err
= sctp_listen_start(sk
, backlog
);
8447 * This function is done by modeling the current datagram_poll() and the
8448 * tcp_poll(). Note that, based on these implementations, we don't
8449 * lock the socket in this function, even though it seems that,
8450 * ideally, locking or some other mechanisms can be used to ensure
8451 * the integrity of the counters (sndbuf and wmem_alloc) used
8452 * in this place. We assume that we don't need locks either until proven
8455 * Another thing to note is that we include the Async I/O support
8456 * here, again, by modeling the current TCP/UDP code. We don't have
8457 * a good way to test with it yet.
8459 __poll_t
sctp_poll(struct file
*file
, struct socket
*sock
, poll_table
*wait
)
8461 struct sock
*sk
= sock
->sk
;
8462 struct sctp_sock
*sp
= sctp_sk(sk
);
8465 poll_wait(file
, sk_sleep(sk
), wait
);
8467 sock_rps_record_flow(sk
);
8469 /* A TCP-style listening socket becomes readable when the accept queue
8472 if (sctp_style(sk
, TCP
) && sctp_sstate(sk
, LISTENING
))
8473 return (!list_empty(&sp
->ep
->asocs
)) ?
8474 (EPOLLIN
| EPOLLRDNORM
) : 0;
8478 /* Is there any exceptional events? */
8479 if (sk
->sk_err
|| !skb_queue_empty_lockless(&sk
->sk_error_queue
))
8481 (sock_flag(sk
, SOCK_SELECT_ERR_QUEUE
) ? EPOLLPRI
: 0);
8482 if (sk
->sk_shutdown
& RCV_SHUTDOWN
)
8483 mask
|= EPOLLRDHUP
| EPOLLIN
| EPOLLRDNORM
;
8484 if (sk
->sk_shutdown
== SHUTDOWN_MASK
)
8487 /* Is it readable? Reconsider this code with TCP-style support. */
8488 if (!skb_queue_empty_lockless(&sk
->sk_receive_queue
))
8489 mask
|= EPOLLIN
| EPOLLRDNORM
;
8491 /* The association is either gone or not ready. */
8492 if (!sctp_style(sk
, UDP
) && sctp_sstate(sk
, CLOSED
))
8495 /* Is it writable? */
8496 if (sctp_writeable(sk
)) {
8497 mask
|= EPOLLOUT
| EPOLLWRNORM
;
8499 sk_set_bit(SOCKWQ_ASYNC_NOSPACE
, sk
);
8501 * Since the socket is not locked, the buffer
8502 * might be made available after the writeable check and
8503 * before the bit is set. This could cause a lost I/O
8504 * signal. tcp_poll() has a race breaker for this race
8505 * condition. Based on their implementation, we put
8506 * in the following code to cover it as well.
8508 if (sctp_writeable(sk
))
8509 mask
|= EPOLLOUT
| EPOLLWRNORM
;
8514 /********************************************************************
8515 * 2nd Level Abstractions
8516 ********************************************************************/
8518 static struct sctp_bind_bucket
*sctp_bucket_create(
8519 struct sctp_bind_hashbucket
*head
, struct net
*net
, unsigned short snum
)
8521 struct sctp_bind_bucket
*pp
;
8523 pp
= kmem_cache_alloc(sctp_bucket_cachep
, GFP_ATOMIC
);
8525 SCTP_DBG_OBJCNT_INC(bind_bucket
);
8528 INIT_HLIST_HEAD(&pp
->owner
);
8530 hlist_add_head(&pp
->node
, &head
->chain
);
8535 /* Caller must hold hashbucket lock for this tb with local BH disabled */
8536 static void sctp_bucket_destroy(struct sctp_bind_bucket
*pp
)
8538 if (pp
&& hlist_empty(&pp
->owner
)) {
8539 __hlist_del(&pp
->node
);
8540 kmem_cache_free(sctp_bucket_cachep
, pp
);
8541 SCTP_DBG_OBJCNT_DEC(bind_bucket
);
8545 /* Release this socket's reference to a local port. */
8546 static inline void __sctp_put_port(struct sock
*sk
)
8548 struct sctp_bind_hashbucket
*head
=
8549 &sctp_port_hashtable
[sctp_phashfn(sock_net(sk
),
8550 inet_sk(sk
)->inet_num
)];
8551 struct sctp_bind_bucket
*pp
;
8553 spin_lock(&head
->lock
);
8554 pp
= sctp_sk(sk
)->bind_hash
;
8555 __sk_del_bind_node(sk
);
8556 sctp_sk(sk
)->bind_hash
= NULL
;
8557 inet_sk(sk
)->inet_num
= 0;
8558 sctp_bucket_destroy(pp
);
8559 spin_unlock(&head
->lock
);
8562 void sctp_put_port(struct sock
*sk
)
8565 __sctp_put_port(sk
);
8570 * The system picks an ephemeral port and choose an address set equivalent
8571 * to binding with a wildcard address.
8572 * One of those addresses will be the primary address for the association.
8573 * This automatically enables the multihoming capability of SCTP.
8575 static int sctp_autobind(struct sock
*sk
)
8577 union sctp_addr autoaddr
;
8581 /* Initialize a local sockaddr structure to INADDR_ANY. */
8582 af
= sctp_sk(sk
)->pf
->af
;
8584 port
= htons(inet_sk(sk
)->inet_num
);
8585 af
->inaddr_any(&autoaddr
, port
);
8587 return sctp_do_bind(sk
, &autoaddr
, af
->sockaddr_len
);
8590 /* Parse out IPPROTO_SCTP CMSG headers. Perform only minimal validation.
8593 * 4.2 The cmsghdr Structure *
8595 * When ancillary data is sent or received, any number of ancillary data
8596 * objects can be specified by the msg_control and msg_controllen members of
8597 * the msghdr structure, because each object is preceded by
8598 * a cmsghdr structure defining the object's length (the cmsg_len member).
8599 * Historically Berkeley-derived implementations have passed only one object
8600 * at a time, but this API allows multiple objects to be
8601 * passed in a single call to sendmsg() or recvmsg(). The following example
8602 * shows two ancillary data objects in a control buffer.
8604 * |<--------------------------- msg_controllen -------------------------->|
8607 * |<----- ancillary data object ----->|<----- ancillary data object ----->|
8609 * |<---------- CMSG_SPACE() --------->|<---------- CMSG_SPACE() --------->|
8612 * |<---------- cmsg_len ---------->| |<--------- cmsg_len ----------->| |
8614 * |<--------- CMSG_LEN() --------->| |<-------- CMSG_LEN() ---------->| |
8617 * +-----+-----+-----+--+-----------+--+-----+-----+-----+--+-----------+--+
8618 * |cmsg_|cmsg_|cmsg_|XX| |XX|cmsg_|cmsg_|cmsg_|XX| |XX|
8620 * |len |level|type |XX|cmsg_data[]|XX|len |level|type |XX|cmsg_data[]|XX|
8622 * +-----+-----+-----+--+-----------+--+-----+-----+-----+--+-----------+--+
8629 static int sctp_msghdr_parse(const struct msghdr
*msg
, struct sctp_cmsgs
*cmsgs
)
8631 struct msghdr
*my_msg
= (struct msghdr
*)msg
;
8632 struct cmsghdr
*cmsg
;
8634 for_each_cmsghdr(cmsg
, my_msg
) {
8635 if (!CMSG_OK(my_msg
, cmsg
))
8638 /* Should we parse this header or ignore? */
8639 if (cmsg
->cmsg_level
!= IPPROTO_SCTP
)
8642 /* Strictly check lengths following example in SCM code. */
8643 switch (cmsg
->cmsg_type
) {
8645 /* SCTP Socket API Extension
8646 * 5.3.1 SCTP Initiation Structure (SCTP_INIT)
8648 * This cmsghdr structure provides information for
8649 * initializing new SCTP associations with sendmsg().
8650 * The SCTP_INITMSG socket option uses this same data
8651 * structure. This structure is not used for
8654 * cmsg_level cmsg_type cmsg_data[]
8655 * ------------ ------------ ----------------------
8656 * IPPROTO_SCTP SCTP_INIT struct sctp_initmsg
8658 if (cmsg
->cmsg_len
!= CMSG_LEN(sizeof(struct sctp_initmsg
)))
8661 cmsgs
->init
= CMSG_DATA(cmsg
);
8665 /* SCTP Socket API Extension
8666 * 5.3.2 SCTP Header Information Structure(SCTP_SNDRCV)
8668 * This cmsghdr structure specifies SCTP options for
8669 * sendmsg() and describes SCTP header information
8670 * about a received message through recvmsg().
8672 * cmsg_level cmsg_type cmsg_data[]
8673 * ------------ ------------ ----------------------
8674 * IPPROTO_SCTP SCTP_SNDRCV struct sctp_sndrcvinfo
8676 if (cmsg
->cmsg_len
!= CMSG_LEN(sizeof(struct sctp_sndrcvinfo
)))
8679 cmsgs
->srinfo
= CMSG_DATA(cmsg
);
8681 if (cmsgs
->srinfo
->sinfo_flags
&
8682 ~(SCTP_UNORDERED
| SCTP_ADDR_OVER
|
8683 SCTP_SACK_IMMEDIATELY
| SCTP_SENDALL
|
8684 SCTP_PR_SCTP_MASK
| SCTP_ABORT
| SCTP_EOF
))
8689 /* SCTP Socket API Extension
8690 * 5.3.4 SCTP Send Information Structure (SCTP_SNDINFO)
8692 * This cmsghdr structure specifies SCTP options for
8693 * sendmsg(). This structure and SCTP_RCVINFO replaces
8694 * SCTP_SNDRCV which has been deprecated.
8696 * cmsg_level cmsg_type cmsg_data[]
8697 * ------------ ------------ ---------------------
8698 * IPPROTO_SCTP SCTP_SNDINFO struct sctp_sndinfo
8700 if (cmsg
->cmsg_len
!= CMSG_LEN(sizeof(struct sctp_sndinfo
)))
8703 cmsgs
->sinfo
= CMSG_DATA(cmsg
);
8705 if (cmsgs
->sinfo
->snd_flags
&
8706 ~(SCTP_UNORDERED
| SCTP_ADDR_OVER
|
8707 SCTP_SACK_IMMEDIATELY
| SCTP_SENDALL
|
8708 SCTP_PR_SCTP_MASK
| SCTP_ABORT
| SCTP_EOF
))
8712 /* SCTP Socket API Extension
8713 * 5.3.7 SCTP PR-SCTP Information Structure (SCTP_PRINFO)
8715 * This cmsghdr structure specifies SCTP options for sendmsg().
8717 * cmsg_level cmsg_type cmsg_data[]
8718 * ------------ ------------ ---------------------
8719 * IPPROTO_SCTP SCTP_PRINFO struct sctp_prinfo
8721 if (cmsg
->cmsg_len
!= CMSG_LEN(sizeof(struct sctp_prinfo
)))
8724 cmsgs
->prinfo
= CMSG_DATA(cmsg
);
8725 if (cmsgs
->prinfo
->pr_policy
& ~SCTP_PR_SCTP_MASK
)
8728 if (cmsgs
->prinfo
->pr_policy
== SCTP_PR_SCTP_NONE
)
8729 cmsgs
->prinfo
->pr_value
= 0;
8732 /* SCTP Socket API Extension
8733 * 5.3.8 SCTP AUTH Information Structure (SCTP_AUTHINFO)
8735 * This cmsghdr structure specifies SCTP options for sendmsg().
8737 * cmsg_level cmsg_type cmsg_data[]
8738 * ------------ ------------ ---------------------
8739 * IPPROTO_SCTP SCTP_AUTHINFO struct sctp_authinfo
8741 if (cmsg
->cmsg_len
!= CMSG_LEN(sizeof(struct sctp_authinfo
)))
8744 cmsgs
->authinfo
= CMSG_DATA(cmsg
);
8746 case SCTP_DSTADDRV4
:
8747 case SCTP_DSTADDRV6
:
8748 /* SCTP Socket API Extension
8749 * 5.3.9/10 SCTP Destination IPv4/6 Address Structure (SCTP_DSTADDRV4/6)
8751 * This cmsghdr structure specifies SCTP options for sendmsg().
8753 * cmsg_level cmsg_type cmsg_data[]
8754 * ------------ ------------ ---------------------
8755 * IPPROTO_SCTP SCTP_DSTADDRV4 struct in_addr
8756 * ------------ ------------ ---------------------
8757 * IPPROTO_SCTP SCTP_DSTADDRV6 struct in6_addr
8759 cmsgs
->addrs_msg
= my_msg
;
8770 * Wait for a packet..
8771 * Note: This function is the same function as in core/datagram.c
8772 * with a few modifications to make lksctp work.
8774 static int sctp_wait_for_packet(struct sock
*sk
, int *err
, long *timeo_p
)
8779 prepare_to_wait_exclusive(sk_sleep(sk
), &wait
, TASK_INTERRUPTIBLE
);
8781 /* Socket errors? */
8782 error
= sock_error(sk
);
8786 if (!skb_queue_empty(&sk
->sk_receive_queue
))
8789 /* Socket shut down? */
8790 if (sk
->sk_shutdown
& RCV_SHUTDOWN
)
8793 /* Sequenced packets can come disconnected. If so we report the
8798 /* Is there a good reason to think that we may receive some data? */
8799 if (list_empty(&sctp_sk(sk
)->ep
->asocs
) && !sctp_sstate(sk
, LISTENING
))
8802 /* Handle signals. */
8803 if (signal_pending(current
))
8806 /* Let another process have a go. Since we are going to sleep
8807 * anyway. Note: This may cause odd behaviors if the message
8808 * does not fit in the user's buffer, but this seems to be the
8809 * only way to honor MSG_DONTWAIT realistically.
8812 *timeo_p
= schedule_timeout(*timeo_p
);
8816 finish_wait(sk_sleep(sk
), &wait
);
8820 error
= sock_intr_errno(*timeo_p
);
8823 finish_wait(sk_sleep(sk
), &wait
);
8828 /* Receive a datagram.
8829 * Note: This is pretty much the same routine as in core/datagram.c
8830 * with a few changes to make lksctp work.
8832 struct sk_buff
*sctp_skb_recv_datagram(struct sock
*sk
, int flags
,
8833 int noblock
, int *err
)
8836 struct sk_buff
*skb
;
8839 timeo
= sock_rcvtimeo(sk
, noblock
);
8841 pr_debug("%s: timeo:%ld, max:%ld\n", __func__
, timeo
,
8842 MAX_SCHEDULE_TIMEOUT
);
8845 /* Again only user level code calls this function,
8846 * so nothing interrupt level
8847 * will suddenly eat the receive_queue.
8849 * Look at current nfs client by the way...
8850 * However, this function was correct in any case. 8)
8852 if (flags
& MSG_PEEK
) {
8853 skb
= skb_peek(&sk
->sk_receive_queue
);
8855 refcount_inc(&skb
->users
);
8857 skb
= __skb_dequeue(&sk
->sk_receive_queue
);
8863 /* Caller is allowed not to check sk->sk_err before calling. */
8864 error
= sock_error(sk
);
8868 if (sk
->sk_shutdown
& RCV_SHUTDOWN
)
8871 if (sk_can_busy_loop(sk
)) {
8872 sk_busy_loop(sk
, noblock
);
8874 if (!skb_queue_empty_lockless(&sk
->sk_receive_queue
))
8878 /* User doesn't want to wait. */
8882 } while (sctp_wait_for_packet(sk
, err
, &timeo
) == 0);
8891 /* If sndbuf has changed, wake up per association sndbuf waiters. */
8892 static void __sctp_write_space(struct sctp_association
*asoc
)
8894 struct sock
*sk
= asoc
->base
.sk
;
8896 if (sctp_wspace(asoc
) <= 0)
8899 if (waitqueue_active(&asoc
->wait
))
8900 wake_up_interruptible(&asoc
->wait
);
8902 if (sctp_writeable(sk
)) {
8903 struct socket_wq
*wq
;
8906 wq
= rcu_dereference(sk
->sk_wq
);
8908 if (waitqueue_active(&wq
->wait
))
8909 wake_up_interruptible(&wq
->wait
);
8911 /* Note that we try to include the Async I/O support
8912 * here by modeling from the current TCP/UDP code.
8913 * We have not tested with it yet.
8915 if (!(sk
->sk_shutdown
& SEND_SHUTDOWN
))
8916 sock_wake_async(wq
, SOCK_WAKE_SPACE
, POLL_OUT
);
8922 static void sctp_wake_up_waiters(struct sock
*sk
,
8923 struct sctp_association
*asoc
)
8925 struct sctp_association
*tmp
= asoc
;
8927 /* We do accounting for the sndbuf space per association,
8928 * so we only need to wake our own association.
8930 if (asoc
->ep
->sndbuf_policy
)
8931 return __sctp_write_space(asoc
);
8933 /* If association goes down and is just flushing its
8934 * outq, then just normally notify others.
8936 if (asoc
->base
.dead
)
8937 return sctp_write_space(sk
);
8939 /* Accounting for the sndbuf space is per socket, so we
8940 * need to wake up others, try to be fair and in case of
8941 * other associations, let them have a go first instead
8942 * of just doing a sctp_write_space() call.
8944 * Note that we reach sctp_wake_up_waiters() only when
8945 * associations free up queued chunks, thus we are under
8946 * lock and the list of associations on a socket is
8947 * guaranteed not to change.
8949 for (tmp
= list_next_entry(tmp
, asocs
); 1;
8950 tmp
= list_next_entry(tmp
, asocs
)) {
8951 /* Manually skip the head element. */
8952 if (&tmp
->asocs
== &((sctp_sk(sk
))->ep
->asocs
))
8954 /* Wake up association. */
8955 __sctp_write_space(tmp
);
8956 /* We've reached the end. */
8962 /* Do accounting for the sndbuf space.
8963 * Decrement the used sndbuf space of the corresponding association by the
8964 * data size which was just transmitted(freed).
8966 static void sctp_wfree(struct sk_buff
*skb
)
8968 struct sctp_chunk
*chunk
= skb_shinfo(skb
)->destructor_arg
;
8969 struct sctp_association
*asoc
= chunk
->asoc
;
8970 struct sock
*sk
= asoc
->base
.sk
;
8972 sk_mem_uncharge(sk
, skb
->truesize
);
8973 sk
->sk_wmem_queued
-= skb
->truesize
+ sizeof(struct sctp_chunk
);
8974 asoc
->sndbuf_used
-= skb
->truesize
+ sizeof(struct sctp_chunk
);
8975 WARN_ON(refcount_sub_and_test(sizeof(struct sctp_chunk
),
8976 &sk
->sk_wmem_alloc
));
8979 struct sctp_shared_key
*shkey
= chunk
->shkey
;
8981 /* refcnt == 2 and !list_empty mean after this release, it's
8982 * not being used anywhere, and it's time to notify userland
8983 * that this shkey can be freed if it's been deactivated.
8985 if (shkey
->deactivated
&& !list_empty(&shkey
->key_list
) &&
8986 refcount_read(&shkey
->refcnt
) == 2) {
8987 struct sctp_ulpevent
*ev
;
8989 ev
= sctp_ulpevent_make_authkey(asoc
, shkey
->key_id
,
8993 asoc
->stream
.si
->enqueue_event(&asoc
->ulpq
, ev
);
8995 sctp_auth_shkey_release(chunk
->shkey
);
8999 sctp_wake_up_waiters(sk
, asoc
);
9001 sctp_association_put(asoc
);
9004 /* Do accounting for the receive space on the socket.
9005 * Accounting for the association is done in ulpevent.c
9006 * We set this as a destructor for the cloned data skbs so that
9007 * accounting is done at the correct time.
9009 void sctp_sock_rfree(struct sk_buff
*skb
)
9011 struct sock
*sk
= skb
->sk
;
9012 struct sctp_ulpevent
*event
= sctp_skb2event(skb
);
9014 atomic_sub(event
->rmem_len
, &sk
->sk_rmem_alloc
);
9017 * Mimic the behavior of sock_rfree
9019 sk_mem_uncharge(sk
, event
->rmem_len
);
9023 /* Helper function to wait for space in the sndbuf. */
9024 static int sctp_wait_for_sndbuf(struct sctp_association
*asoc
, long *timeo_p
,
9027 struct sock
*sk
= asoc
->base
.sk
;
9028 long current_timeo
= *timeo_p
;
9032 pr_debug("%s: asoc:%p, timeo:%ld, msg_len:%zu\n", __func__
, asoc
,
9035 /* Increment the association's refcnt. */
9036 sctp_association_hold(asoc
);
9038 /* Wait on the association specific sndbuf space. */
9040 prepare_to_wait_exclusive(&asoc
->wait
, &wait
,
9041 TASK_INTERRUPTIBLE
);
9042 if (asoc
->base
.dead
)
9046 if (sk
->sk_err
|| asoc
->state
>= SCTP_STATE_SHUTDOWN_PENDING
)
9048 if (signal_pending(current
))
9049 goto do_interrupted
;
9050 if (sk_under_memory_pressure(sk
))
9052 if ((int)msg_len
<= sctp_wspace(asoc
) &&
9053 sk_wmem_schedule(sk
, msg_len
))
9056 /* Let another process have a go. Since we are going
9060 current_timeo
= schedule_timeout(current_timeo
);
9062 if (sk
!= asoc
->base
.sk
)
9065 *timeo_p
= current_timeo
;
9069 finish_wait(&asoc
->wait
, &wait
);
9071 /* Release the association's refcnt. */
9072 sctp_association_put(asoc
);
9085 err
= sock_intr_errno(*timeo_p
);
9093 void sctp_data_ready(struct sock
*sk
)
9095 struct socket_wq
*wq
;
9098 wq
= rcu_dereference(sk
->sk_wq
);
9099 if (skwq_has_sleeper(wq
))
9100 wake_up_interruptible_sync_poll(&wq
->wait
, EPOLLIN
|
9101 EPOLLRDNORM
| EPOLLRDBAND
);
9102 sk_wake_async(sk
, SOCK_WAKE_WAITD
, POLL_IN
);
9106 /* If socket sndbuf has changed, wake up all per association waiters. */
9107 void sctp_write_space(struct sock
*sk
)
9109 struct sctp_association
*asoc
;
9111 /* Wake up the tasks in each wait queue. */
9112 list_for_each_entry(asoc
, &((sctp_sk(sk
))->ep
->asocs
), asocs
) {
9113 __sctp_write_space(asoc
);
9117 /* Is there any sndbuf space available on the socket?
9119 * Note that sk_wmem_alloc is the sum of the send buffers on all of the
9120 * associations on the same socket. For a UDP-style socket with
9121 * multiple associations, it is possible for it to be "unwriteable"
9122 * prematurely. I assume that this is acceptable because
9123 * a premature "unwriteable" is better than an accidental "writeable" which
9124 * would cause an unwanted block under certain circumstances. For the 1-1
9125 * UDP-style sockets or TCP-style sockets, this code should work.
9128 static bool sctp_writeable(struct sock
*sk
)
9130 return sk
->sk_sndbuf
> sk
->sk_wmem_queued
;
9133 /* Wait for an association to go into ESTABLISHED state. If timeout is 0,
9134 * returns immediately with EINPROGRESS.
9136 static int sctp_wait_for_connect(struct sctp_association
*asoc
, long *timeo_p
)
9138 struct sock
*sk
= asoc
->base
.sk
;
9140 long current_timeo
= *timeo_p
;
9143 pr_debug("%s: asoc:%p, timeo:%ld\n", __func__
, asoc
, *timeo_p
);
9145 /* Increment the association's refcnt. */
9146 sctp_association_hold(asoc
);
9149 prepare_to_wait_exclusive(&asoc
->wait
, &wait
,
9150 TASK_INTERRUPTIBLE
);
9153 if (sk
->sk_shutdown
& RCV_SHUTDOWN
)
9155 if (sk
->sk_err
|| asoc
->state
>= SCTP_STATE_SHUTDOWN_PENDING
||
9158 if (signal_pending(current
))
9159 goto do_interrupted
;
9161 if (sctp_state(asoc
, ESTABLISHED
))
9164 /* Let another process have a go. Since we are going
9168 current_timeo
= schedule_timeout(current_timeo
);
9171 *timeo_p
= current_timeo
;
9175 finish_wait(&asoc
->wait
, &wait
);
9177 /* Release the association's refcnt. */
9178 sctp_association_put(asoc
);
9183 if (asoc
->init_err_counter
+ 1 > asoc
->max_init_attempts
)
9186 err
= -ECONNREFUSED
;
9190 err
= sock_intr_errno(*timeo_p
);
9198 static int sctp_wait_for_accept(struct sock
*sk
, long timeo
)
9200 struct sctp_endpoint
*ep
;
9204 ep
= sctp_sk(sk
)->ep
;
9208 prepare_to_wait_exclusive(sk_sleep(sk
), &wait
,
9209 TASK_INTERRUPTIBLE
);
9211 if (list_empty(&ep
->asocs
)) {
9213 timeo
= schedule_timeout(timeo
);
9218 if (!sctp_sstate(sk
, LISTENING
))
9222 if (!list_empty(&ep
->asocs
))
9225 err
= sock_intr_errno(timeo
);
9226 if (signal_pending(current
))
9234 finish_wait(sk_sleep(sk
), &wait
);
9239 static void sctp_wait_for_close(struct sock
*sk
, long timeout
)
9244 prepare_to_wait(sk_sleep(sk
), &wait
, TASK_INTERRUPTIBLE
);
9245 if (list_empty(&sctp_sk(sk
)->ep
->asocs
))
9248 timeout
= schedule_timeout(timeout
);
9250 } while (!signal_pending(current
) && timeout
);
9252 finish_wait(sk_sleep(sk
), &wait
);
9255 static void sctp_skb_set_owner_r_frag(struct sk_buff
*skb
, struct sock
*sk
)
9257 struct sk_buff
*frag
;
9262 /* Don't forget the fragments. */
9263 skb_walk_frags(skb
, frag
)
9264 sctp_skb_set_owner_r_frag(frag
, sk
);
9267 sctp_skb_set_owner_r(skb
, sk
);
9270 void sctp_copy_sock(struct sock
*newsk
, struct sock
*sk
,
9271 struct sctp_association
*asoc
)
9273 struct inet_sock
*inet
= inet_sk(sk
);
9274 struct inet_sock
*newinet
;
9275 struct sctp_sock
*sp
= sctp_sk(sk
);
9276 struct sctp_endpoint
*ep
= sp
->ep
;
9278 newsk
->sk_type
= sk
->sk_type
;
9279 newsk
->sk_bound_dev_if
= sk
->sk_bound_dev_if
;
9280 newsk
->sk_flags
= sk
->sk_flags
;
9281 newsk
->sk_tsflags
= sk
->sk_tsflags
;
9282 newsk
->sk_no_check_tx
= sk
->sk_no_check_tx
;
9283 newsk
->sk_no_check_rx
= sk
->sk_no_check_rx
;
9284 newsk
->sk_reuse
= sk
->sk_reuse
;
9285 sctp_sk(newsk
)->reuse
= sp
->reuse
;
9287 newsk
->sk_shutdown
= sk
->sk_shutdown
;
9288 newsk
->sk_destruct
= sctp_destruct_sock
;
9289 newsk
->sk_family
= sk
->sk_family
;
9290 newsk
->sk_protocol
= IPPROTO_SCTP
;
9291 newsk
->sk_backlog_rcv
= sk
->sk_prot
->backlog_rcv
;
9292 newsk
->sk_sndbuf
= sk
->sk_sndbuf
;
9293 newsk
->sk_rcvbuf
= sk
->sk_rcvbuf
;
9294 newsk
->sk_lingertime
= sk
->sk_lingertime
;
9295 newsk
->sk_rcvtimeo
= sk
->sk_rcvtimeo
;
9296 newsk
->sk_sndtimeo
= sk
->sk_sndtimeo
;
9297 newsk
->sk_rxhash
= sk
->sk_rxhash
;
9299 newinet
= inet_sk(newsk
);
9301 /* Initialize sk's sport, dport, rcv_saddr and daddr for
9302 * getsockname() and getpeername()
9304 newinet
->inet_sport
= inet
->inet_sport
;
9305 newinet
->inet_saddr
= inet
->inet_saddr
;
9306 newinet
->inet_rcv_saddr
= inet
->inet_rcv_saddr
;
9307 newinet
->inet_dport
= htons(asoc
->peer
.port
);
9308 newinet
->pmtudisc
= inet
->pmtudisc
;
9309 newinet
->inet_id
= prandom_u32();
9311 newinet
->uc_ttl
= inet
->uc_ttl
;
9312 newinet
->mc_loop
= 1;
9313 newinet
->mc_ttl
= 1;
9314 newinet
->mc_index
= 0;
9315 newinet
->mc_list
= NULL
;
9317 if (newsk
->sk_flags
& SK_FLAGS_TIMESTAMP
)
9318 net_enable_timestamp();
9320 /* Set newsk security attributes from orginal sk and connection
9321 * security attribute from ep.
9323 security_sctp_sk_clone(ep
, sk
, newsk
);
9326 static inline void sctp_copy_descendant(struct sock
*sk_to
,
9327 const struct sock
*sk_from
)
9329 int ancestor_size
= sizeof(struct inet_sock
) +
9330 sizeof(struct sctp_sock
) -
9331 offsetof(struct sctp_sock
, pd_lobby
);
9333 if (sk_from
->sk_family
== PF_INET6
)
9334 ancestor_size
+= sizeof(struct ipv6_pinfo
);
9336 __inet_sk_copy_descendant(sk_to
, sk_from
, ancestor_size
);
9339 /* Populate the fields of the newsk from the oldsk and migrate the assoc
9340 * and its messages to the newsk.
9342 static int sctp_sock_migrate(struct sock
*oldsk
, struct sock
*newsk
,
9343 struct sctp_association
*assoc
,
9344 enum sctp_socket_type type
)
9346 struct sctp_sock
*oldsp
= sctp_sk(oldsk
);
9347 struct sctp_sock
*newsp
= sctp_sk(newsk
);
9348 struct sctp_bind_bucket
*pp
; /* hash list port iterator */
9349 struct sctp_endpoint
*newep
= newsp
->ep
;
9350 struct sk_buff
*skb
, *tmp
;
9351 struct sctp_ulpevent
*event
;
9352 struct sctp_bind_hashbucket
*head
;
9355 /* Migrate socket buffer sizes and all the socket level options to the
9358 newsk
->sk_sndbuf
= oldsk
->sk_sndbuf
;
9359 newsk
->sk_rcvbuf
= oldsk
->sk_rcvbuf
;
9360 /* Brute force copy old sctp opt. */
9361 sctp_copy_descendant(newsk
, oldsk
);
9363 /* Restore the ep value that was overwritten with the above structure
9369 /* Hook this new socket in to the bind_hash list. */
9370 head
= &sctp_port_hashtable
[sctp_phashfn(sock_net(oldsk
),
9371 inet_sk(oldsk
)->inet_num
)];
9372 spin_lock_bh(&head
->lock
);
9373 pp
= sctp_sk(oldsk
)->bind_hash
;
9374 sk_add_bind_node(newsk
, &pp
->owner
);
9375 sctp_sk(newsk
)->bind_hash
= pp
;
9376 inet_sk(newsk
)->inet_num
= inet_sk(oldsk
)->inet_num
;
9377 spin_unlock_bh(&head
->lock
);
9379 /* Copy the bind_addr list from the original endpoint to the new
9380 * endpoint so that we can handle restarts properly
9382 err
= sctp_bind_addr_dup(&newsp
->ep
->base
.bind_addr
,
9383 &oldsp
->ep
->base
.bind_addr
, GFP_KERNEL
);
9387 /* New ep's auth_hmacs should be set if old ep's is set, in case
9388 * that net->sctp.auth_enable has been changed to 0 by users and
9389 * new ep's auth_hmacs couldn't be set in sctp_endpoint_init().
9391 if (oldsp
->ep
->auth_hmacs
) {
9392 err
= sctp_auth_init_hmacs(newsp
->ep
, GFP_KERNEL
);
9397 /* Move any messages in the old socket's receive queue that are for the
9398 * peeled off association to the new socket's receive queue.
9400 sctp_skb_for_each(skb
, &oldsk
->sk_receive_queue
, tmp
) {
9401 event
= sctp_skb2event(skb
);
9402 if (event
->asoc
== assoc
) {
9403 __skb_unlink(skb
, &oldsk
->sk_receive_queue
);
9404 __skb_queue_tail(&newsk
->sk_receive_queue
, skb
);
9405 sctp_skb_set_owner_r_frag(skb
, newsk
);
9409 /* Clean up any messages pending delivery due to partial
9410 * delivery. Three cases:
9411 * 1) No partial deliver; no work.
9412 * 2) Peeling off partial delivery; keep pd_lobby in new pd_lobby.
9413 * 3) Peeling off non-partial delivery; move pd_lobby to receive_queue.
9415 atomic_set(&sctp_sk(newsk
)->pd_mode
, assoc
->ulpq
.pd_mode
);
9417 if (atomic_read(&sctp_sk(oldsk
)->pd_mode
)) {
9418 struct sk_buff_head
*queue
;
9420 /* Decide which queue to move pd_lobby skbs to. */
9421 if (assoc
->ulpq
.pd_mode
) {
9422 queue
= &newsp
->pd_lobby
;
9424 queue
= &newsk
->sk_receive_queue
;
9426 /* Walk through the pd_lobby, looking for skbs that
9427 * need moved to the new socket.
9429 sctp_skb_for_each(skb
, &oldsp
->pd_lobby
, tmp
) {
9430 event
= sctp_skb2event(skb
);
9431 if (event
->asoc
== assoc
) {
9432 __skb_unlink(skb
, &oldsp
->pd_lobby
);
9433 __skb_queue_tail(queue
, skb
);
9434 sctp_skb_set_owner_r_frag(skb
, newsk
);
9438 /* Clear up any skbs waiting for the partial
9439 * delivery to finish.
9441 if (assoc
->ulpq
.pd_mode
)
9442 sctp_clear_pd(oldsk
, NULL
);
9446 sctp_for_each_rx_skb(assoc
, newsk
, sctp_skb_set_owner_r_frag
);
9448 /* Set the type of socket to indicate that it is peeled off from the
9449 * original UDP-style socket or created with the accept() call on a
9450 * TCP-style socket..
9454 /* Mark the new socket "in-use" by the user so that any packets
9455 * that may arrive on the association after we've moved it are
9456 * queued to the backlog. This prevents a potential race between
9457 * backlog processing on the old socket and new-packet processing
9458 * on the new socket.
9460 * The caller has just allocated newsk so we can guarantee that other
9461 * paths won't try to lock it and then oldsk.
9463 lock_sock_nested(newsk
, SINGLE_DEPTH_NESTING
);
9464 sctp_for_each_tx_datachunk(assoc
, sctp_clear_owner_w
);
9465 sctp_assoc_migrate(assoc
, newsk
);
9466 sctp_for_each_tx_datachunk(assoc
, sctp_set_owner_w
);
9468 /* If the association on the newsk is already closed before accept()
9469 * is called, set RCV_SHUTDOWN flag.
9471 if (sctp_state(assoc
, CLOSED
) && sctp_style(newsk
, TCP
)) {
9472 inet_sk_set_state(newsk
, SCTP_SS_CLOSED
);
9473 newsk
->sk_shutdown
|= RCV_SHUTDOWN
;
9475 inet_sk_set_state(newsk
, SCTP_SS_ESTABLISHED
);
9478 release_sock(newsk
);
9484 /* This proto struct describes the ULP interface for SCTP. */
9485 struct proto sctp_prot
= {
9487 .owner
= THIS_MODULE
,
9488 .close
= sctp_close
,
9489 .disconnect
= sctp_disconnect
,
9490 .accept
= sctp_accept
,
9491 .ioctl
= sctp_ioctl
,
9492 .init
= sctp_init_sock
,
9493 .destroy
= sctp_destroy_sock
,
9494 .shutdown
= sctp_shutdown
,
9495 .setsockopt
= sctp_setsockopt
,
9496 .getsockopt
= sctp_getsockopt
,
9497 .sendmsg
= sctp_sendmsg
,
9498 .recvmsg
= sctp_recvmsg
,
9500 .backlog_rcv
= sctp_backlog_rcv
,
9502 .unhash
= sctp_unhash
,
9503 .no_autobind
= true,
9504 .obj_size
= sizeof(struct sctp_sock
),
9505 .useroffset
= offsetof(struct sctp_sock
, subscribe
),
9506 .usersize
= offsetof(struct sctp_sock
, initmsg
) -
9507 offsetof(struct sctp_sock
, subscribe
) +
9508 sizeof_field(struct sctp_sock
, initmsg
),
9509 .sysctl_mem
= sysctl_sctp_mem
,
9510 .sysctl_rmem
= sysctl_sctp_rmem
,
9511 .sysctl_wmem
= sysctl_sctp_wmem
,
9512 .memory_pressure
= &sctp_memory_pressure
,
9513 .enter_memory_pressure
= sctp_enter_memory_pressure
,
9514 .memory_allocated
= &sctp_memory_allocated
,
9515 .sockets_allocated
= &sctp_sockets_allocated
,
9518 #if IS_ENABLED(CONFIG_IPV6)
9520 #include <net/transp_v6.h>
9521 static void sctp_v6_destroy_sock(struct sock
*sk
)
9523 sctp_destroy_sock(sk
);
9524 inet6_destroy_sock(sk
);
9527 struct proto sctpv6_prot
= {
9529 .owner
= THIS_MODULE
,
9530 .close
= sctp_close
,
9531 .disconnect
= sctp_disconnect
,
9532 .accept
= sctp_accept
,
9533 .ioctl
= sctp_ioctl
,
9534 .init
= sctp_init_sock
,
9535 .destroy
= sctp_v6_destroy_sock
,
9536 .shutdown
= sctp_shutdown
,
9537 .setsockopt
= sctp_setsockopt
,
9538 .getsockopt
= sctp_getsockopt
,
9539 .sendmsg
= sctp_sendmsg
,
9540 .recvmsg
= sctp_recvmsg
,
9542 .backlog_rcv
= sctp_backlog_rcv
,
9544 .unhash
= sctp_unhash
,
9545 .no_autobind
= true,
9546 .obj_size
= sizeof(struct sctp6_sock
),
9547 .useroffset
= offsetof(struct sctp6_sock
, sctp
.subscribe
),
9548 .usersize
= offsetof(struct sctp6_sock
, sctp
.initmsg
) -
9549 offsetof(struct sctp6_sock
, sctp
.subscribe
) +
9550 sizeof_field(struct sctp6_sock
, sctp
.initmsg
),
9551 .sysctl_mem
= sysctl_sctp_mem
,
9552 .sysctl_rmem
= sysctl_sctp_rmem
,
9553 .sysctl_wmem
= sysctl_sctp_wmem
,
9554 .memory_pressure
= &sctp_memory_pressure
,
9555 .enter_memory_pressure
= sctp_enter_memory_pressure
,
9556 .memory_allocated
= &sctp_memory_allocated
,
9557 .sockets_allocated
= &sctp_sockets_allocated
,
9559 #endif /* IS_ENABLED(CONFIG_IPV6) */