1 /* SCTP kernel implementation
2 * (C) Copyright IBM Corp. 2001, 2004
3 * Copyright (c) 1999-2000 Cisco, Inc.
4 * Copyright (c) 1999-2001 Motorola, Inc.
5 * Copyright (c) 2001-2003 Intel Corp.
6 * Copyright (c) 2001-2002 Nokia, Inc.
7 * Copyright (c) 2001 La Monte H.P. Yarroll
9 * This file is part of the SCTP kernel implementation
11 * These functions interface with the sockets layer to implement the
12 * SCTP Extensions for the Sockets API.
14 * Note that the descriptions from the specification are USER level
15 * functions--this file is the functions which populate the struct proto
16 * for SCTP which is the BOTTOM of the sockets interface.
18 * This SCTP implementation is free software;
19 * you can redistribute it and/or modify it under the terms of
20 * the GNU General Public License as published by
21 * the Free Software Foundation; either version 2, or (at your option)
24 * This SCTP implementation is distributed in the hope that it
25 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
26 * ************************
27 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
28 * See the GNU General Public License for more details.
30 * You should have received a copy of the GNU General Public License
31 * along with GNU CC; see the file COPYING. If not, see
32 * <http://www.gnu.org/licenses/>.
34 * Please send any bug reports or fixes you make to the
36 * lksctp developers <linux-sctp@vger.kernel.org>
38 * Written or modified by:
39 * La Monte H.P. Yarroll <piggy@acm.org>
40 * Narasimha Budihal <narsi@refcode.org>
41 * Karl Knutson <karl@athena.chicago.il.us>
42 * Jon Grimm <jgrimm@us.ibm.com>
43 * Xingang Guo <xingang.guo@intel.com>
44 * Daisy Chang <daisyc@us.ibm.com>
45 * Sridhar Samudrala <samudrala@us.ibm.com>
46 * Inaky Perez-Gonzalez <inaky.gonzalez@intel.com>
47 * Ardelle Fan <ardelle.fan@intel.com>
48 * Ryan Layer <rmlayer@us.ibm.com>
49 * Anup Pemmaiah <pemmaiah@cc.usu.edu>
50 * Kevin Gao <kevin.gao@intel.com>
53 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
55 #include <crypto/hash.h>
56 #include <linux/types.h>
57 #include <linux/kernel.h>
58 #include <linux/wait.h>
59 #include <linux/time.h>
60 #include <linux/sched/signal.h>
62 #include <linux/capability.h>
63 #include <linux/fcntl.h>
64 #include <linux/poll.h>
65 #include <linux/init.h>
66 #include <linux/slab.h>
67 #include <linux/file.h>
68 #include <linux/compat.h>
72 #include <net/route.h>
74 #include <net/inet_common.h>
75 #include <net/busy_poll.h>
77 #include <linux/socket.h> /* for sa_family_t */
78 #include <linux/export.h>
80 #include <net/sctp/sctp.h>
81 #include <net/sctp/sm.h>
83 /* Forward declarations for internal helper functions. */
84 static int sctp_writeable(struct sock
*sk
);
85 static void sctp_wfree(struct sk_buff
*skb
);
86 static int sctp_wait_for_sndbuf(struct sctp_association
*asoc
, long *timeo_p
,
88 static int sctp_wait_for_packet(struct sock
*sk
, int *err
, long *timeo_p
);
89 static int sctp_wait_for_connect(struct sctp_association
*, long *timeo_p
);
90 static int sctp_wait_for_accept(struct sock
*sk
, long timeo
);
91 static void sctp_wait_for_close(struct sock
*sk
, long timeo
);
92 static void sctp_destruct_sock(struct sock
*sk
);
93 static struct sctp_af
*sctp_sockaddr_af(struct sctp_sock
*opt
,
94 union sctp_addr
*addr
, int len
);
95 static int sctp_bindx_add(struct sock
*, struct sockaddr
*, int);
96 static int sctp_bindx_rem(struct sock
*, struct sockaddr
*, int);
97 static int sctp_send_asconf_add_ip(struct sock
*, struct sockaddr
*, int);
98 static int sctp_send_asconf_del_ip(struct sock
*, struct sockaddr
*, int);
99 static int sctp_send_asconf(struct sctp_association
*asoc
,
100 struct sctp_chunk
*chunk
);
101 static int sctp_do_bind(struct sock
*, union sctp_addr
*, int);
102 static int sctp_autobind(struct sock
*sk
);
103 static void sctp_sock_migrate(struct sock
*oldsk
, struct sock
*newsk
,
104 struct sctp_association
*assoc
,
105 enum sctp_socket_type type
);
107 static unsigned long sctp_memory_pressure
;
108 static atomic_long_t sctp_memory_allocated
;
109 struct percpu_counter sctp_sockets_allocated
;
111 static void sctp_enter_memory_pressure(struct sock
*sk
)
113 sctp_memory_pressure
= 1;
117 /* Get the sndbuf space available at the time on the association. */
118 static inline int sctp_wspace(struct sctp_association
*asoc
)
122 if (asoc
->ep
->sndbuf_policy
)
123 amt
= asoc
->sndbuf_used
;
125 amt
= sk_wmem_alloc_get(asoc
->base
.sk
);
127 if (amt
>= asoc
->base
.sk
->sk_sndbuf
) {
128 if (asoc
->base
.sk
->sk_userlocks
& SOCK_SNDBUF_LOCK
)
131 amt
= sk_stream_wspace(asoc
->base
.sk
);
136 amt
= asoc
->base
.sk
->sk_sndbuf
- amt
;
141 /* Increment the used sndbuf space count of the corresponding association by
142 * the size of the outgoing data chunk.
143 * Also, set the skb destructor for sndbuf accounting later.
145 * Since it is always 1-1 between chunk and skb, and also a new skb is always
146 * allocated for chunk bundling in sctp_packet_transmit(), we can use the
147 * destructor in the data chunk skb for the purpose of the sndbuf space
150 static inline void sctp_set_owner_w(struct sctp_chunk
*chunk
)
152 struct sctp_association
*asoc
= chunk
->asoc
;
153 struct sock
*sk
= asoc
->base
.sk
;
155 /* The sndbuf space is tracked per association. */
156 sctp_association_hold(asoc
);
158 skb_set_owner_w(chunk
->skb
, sk
);
160 chunk
->skb
->destructor
= sctp_wfree
;
161 /* Save the chunk pointer in skb for sctp_wfree to use later. */
162 skb_shinfo(chunk
->skb
)->destructor_arg
= chunk
;
164 asoc
->sndbuf_used
+= SCTP_DATA_SNDSIZE(chunk
) +
165 sizeof(struct sk_buff
) +
166 sizeof(struct sctp_chunk
);
168 refcount_add(sizeof(struct sctp_chunk
), &sk
->sk_wmem_alloc
);
169 sk
->sk_wmem_queued
+= chunk
->skb
->truesize
;
170 sk_mem_charge(sk
, chunk
->skb
->truesize
);
173 static void sctp_clear_owner_w(struct sctp_chunk
*chunk
)
175 skb_orphan(chunk
->skb
);
178 static void sctp_for_each_tx_datachunk(struct sctp_association
*asoc
,
179 void (*cb
)(struct sctp_chunk
*))
182 struct sctp_outq
*q
= &asoc
->outqueue
;
183 struct sctp_transport
*t
;
184 struct sctp_chunk
*chunk
;
186 list_for_each_entry(t
, &asoc
->peer
.transport_addr_list
, transports
)
187 list_for_each_entry(chunk
, &t
->transmitted
, transmitted_list
)
190 list_for_each_entry(chunk
, &q
->retransmit
, transmitted_list
)
193 list_for_each_entry(chunk
, &q
->sacked
, transmitted_list
)
196 list_for_each_entry(chunk
, &q
->abandoned
, transmitted_list
)
199 list_for_each_entry(chunk
, &q
->out_chunk_list
, list
)
203 /* Verify that this is a valid address. */
204 static inline int sctp_verify_addr(struct sock
*sk
, union sctp_addr
*addr
,
209 /* Verify basic sockaddr. */
210 af
= sctp_sockaddr_af(sctp_sk(sk
), addr
, len
);
214 /* Is this a valid SCTP address? */
215 if (!af
->addr_valid(addr
, sctp_sk(sk
), NULL
))
218 if (!sctp_sk(sk
)->pf
->send_verify(sctp_sk(sk
), (addr
)))
224 /* Look up the association by its id. If this is not a UDP-style
225 * socket, the ID field is always ignored.
227 struct sctp_association
*sctp_id2assoc(struct sock
*sk
, sctp_assoc_t id
)
229 struct sctp_association
*asoc
= NULL
;
231 /* If this is not a UDP-style socket, assoc id should be ignored. */
232 if (!sctp_style(sk
, UDP
)) {
233 /* Return NULL if the socket state is not ESTABLISHED. It
234 * could be a TCP-style listening socket or a socket which
235 * hasn't yet called connect() to establish an association.
237 if (!sctp_sstate(sk
, ESTABLISHED
) && !sctp_sstate(sk
, CLOSING
))
240 /* Get the first and the only association from the list. */
241 if (!list_empty(&sctp_sk(sk
)->ep
->asocs
))
242 asoc
= list_entry(sctp_sk(sk
)->ep
->asocs
.next
,
243 struct sctp_association
, asocs
);
247 /* Otherwise this is a UDP-style socket. */
248 if (!id
|| (id
== (sctp_assoc_t
)-1))
251 spin_lock_bh(&sctp_assocs_id_lock
);
252 asoc
= (struct sctp_association
*)idr_find(&sctp_assocs_id
, (int)id
);
253 spin_unlock_bh(&sctp_assocs_id_lock
);
255 if (!asoc
|| (asoc
->base
.sk
!= sk
) || asoc
->base
.dead
)
261 /* Look up the transport from an address and an assoc id. If both address and
262 * id are specified, the associations matching the address and the id should be
265 static struct sctp_transport
*sctp_addr_id2transport(struct sock
*sk
,
266 struct sockaddr_storage
*addr
,
269 struct sctp_association
*addr_asoc
= NULL
, *id_asoc
= NULL
;
270 struct sctp_af
*af
= sctp_get_af_specific(addr
->ss_family
);
271 union sctp_addr
*laddr
= (union sctp_addr
*)addr
;
272 struct sctp_transport
*transport
;
274 if (!af
|| sctp_verify_addr(sk
, laddr
, af
->sockaddr_len
))
277 addr_asoc
= sctp_endpoint_lookup_assoc(sctp_sk(sk
)->ep
,
284 id_asoc
= sctp_id2assoc(sk
, id
);
285 if (id_asoc
&& (id_asoc
!= addr_asoc
))
288 sctp_get_pf_specific(sk
->sk_family
)->addr_to_user(sctp_sk(sk
),
289 (union sctp_addr
*)addr
);
294 /* API 3.1.2 bind() - UDP Style Syntax
295 * The syntax of bind() is,
297 * ret = bind(int sd, struct sockaddr *addr, int addrlen);
299 * sd - the socket descriptor returned by socket().
300 * addr - the address structure (struct sockaddr_in or struct
301 * sockaddr_in6 [RFC 2553]),
302 * addr_len - the size of the address structure.
304 static int sctp_bind(struct sock
*sk
, struct sockaddr
*addr
, int addr_len
)
310 pr_debug("%s: sk:%p, addr:%p, addr_len:%d\n", __func__
, sk
,
313 /* Disallow binding twice. */
314 if (!sctp_sk(sk
)->ep
->base
.bind_addr
.port
)
315 retval
= sctp_do_bind(sk
, (union sctp_addr
*)addr
,
325 static long sctp_get_port_local(struct sock
*, union sctp_addr
*);
327 /* Verify this is a valid sockaddr. */
328 static struct sctp_af
*sctp_sockaddr_af(struct sctp_sock
*opt
,
329 union sctp_addr
*addr
, int len
)
333 /* Check minimum size. */
334 if (len
< sizeof (struct sockaddr
))
337 if (!opt
->pf
->af_supported(addr
->sa
.sa_family
, opt
))
340 if (addr
->sa
.sa_family
== AF_INET6
) {
341 if (len
< SIN6_LEN_RFC2133
)
343 /* V4 mapped address are really of AF_INET family */
344 if (ipv6_addr_v4mapped(&addr
->v6
.sin6_addr
) &&
345 !opt
->pf
->af_supported(AF_INET
, opt
))
349 /* If we get this far, af is valid. */
350 af
= sctp_get_af_specific(addr
->sa
.sa_family
);
352 if (len
< af
->sockaddr_len
)
358 /* Bind a local address either to an endpoint or to an association. */
359 static int sctp_do_bind(struct sock
*sk
, union sctp_addr
*addr
, int len
)
361 struct net
*net
= sock_net(sk
);
362 struct sctp_sock
*sp
= sctp_sk(sk
);
363 struct sctp_endpoint
*ep
= sp
->ep
;
364 struct sctp_bind_addr
*bp
= &ep
->base
.bind_addr
;
369 /* Common sockaddr verification. */
370 af
= sctp_sockaddr_af(sp
, addr
, len
);
372 pr_debug("%s: sk:%p, newaddr:%p, len:%d EINVAL\n",
373 __func__
, sk
, addr
, len
);
377 snum
= ntohs(addr
->v4
.sin_port
);
379 pr_debug("%s: sk:%p, new addr:%pISc, port:%d, new port:%d, len:%d\n",
380 __func__
, sk
, &addr
->sa
, bp
->port
, snum
, len
);
382 /* PF specific bind() address verification. */
383 if (!sp
->pf
->bind_verify(sp
, addr
))
384 return -EADDRNOTAVAIL
;
386 /* We must either be unbound, or bind to the same port.
387 * It's OK to allow 0 ports if we are already bound.
388 * We'll just inhert an already bound port in this case
393 else if (snum
!= bp
->port
) {
394 pr_debug("%s: new port %d doesn't match existing port "
395 "%d\n", __func__
, snum
, bp
->port
);
400 if (snum
&& snum
< inet_prot_sock(net
) &&
401 !ns_capable(net
->user_ns
, CAP_NET_BIND_SERVICE
))
404 /* See if the address matches any of the addresses we may have
405 * already bound before checking against other endpoints.
407 if (sctp_bind_addr_match(bp
, addr
, sp
))
410 /* Make sure we are allowed to bind here.
411 * The function sctp_get_port_local() does duplicate address
414 addr
->v4
.sin_port
= htons(snum
);
415 if ((ret
= sctp_get_port_local(sk
, addr
))) {
419 /* Refresh ephemeral port. */
421 bp
->port
= inet_sk(sk
)->inet_num
;
423 /* Add the address to the bind address list.
424 * Use GFP_ATOMIC since BHs will be disabled.
426 ret
= sctp_add_bind_addr(bp
, addr
, af
->sockaddr_len
,
427 SCTP_ADDR_SRC
, GFP_ATOMIC
);
429 /* Copy back into socket for getsockname() use. */
431 inet_sk(sk
)->inet_sport
= htons(inet_sk(sk
)->inet_num
);
432 sp
->pf
->to_sk_saddr(addr
, sk
);
438 /* ADDIP Section 4.1.1 Congestion Control of ASCONF Chunks
440 * R1) One and only one ASCONF Chunk MAY be in transit and unacknowledged
441 * at any one time. If a sender, after sending an ASCONF chunk, decides
442 * it needs to transfer another ASCONF Chunk, it MUST wait until the
443 * ASCONF-ACK Chunk returns from the previous ASCONF Chunk before sending a
444 * subsequent ASCONF. Note this restriction binds each side, so at any
445 * time two ASCONF may be in-transit on any given association (one sent
446 * from each endpoint).
448 static int sctp_send_asconf(struct sctp_association
*asoc
,
449 struct sctp_chunk
*chunk
)
451 struct net
*net
= sock_net(asoc
->base
.sk
);
454 /* If there is an outstanding ASCONF chunk, queue it for later
457 if (asoc
->addip_last_asconf
) {
458 list_add_tail(&chunk
->list
, &asoc
->addip_chunk_list
);
462 /* Hold the chunk until an ASCONF_ACK is received. */
463 sctp_chunk_hold(chunk
);
464 retval
= sctp_primitive_ASCONF(net
, asoc
, chunk
);
466 sctp_chunk_free(chunk
);
468 asoc
->addip_last_asconf
= chunk
;
474 /* Add a list of addresses as bind addresses to local endpoint or
477 * Basically run through each address specified in the addrs/addrcnt
478 * array/length pair, determine if it is IPv6 or IPv4 and call
479 * sctp_do_bind() on it.
481 * If any of them fails, then the operation will be reversed and the
482 * ones that were added will be removed.
484 * Only sctp_setsockopt_bindx() is supposed to call this function.
486 static int sctp_bindx_add(struct sock
*sk
, struct sockaddr
*addrs
, int addrcnt
)
491 struct sockaddr
*sa_addr
;
494 pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", __func__
, sk
,
498 for (cnt
= 0; cnt
< addrcnt
; cnt
++) {
499 /* The list may contain either IPv4 or IPv6 address;
500 * determine the address length for walking thru the list.
503 af
= sctp_get_af_specific(sa_addr
->sa_family
);
509 retval
= sctp_do_bind(sk
, (union sctp_addr
*)sa_addr
,
512 addr_buf
+= af
->sockaddr_len
;
516 /* Failed. Cleanup the ones that have been added */
518 sctp_bindx_rem(sk
, addrs
, cnt
);
526 /* Send an ASCONF chunk with Add IP address parameters to all the peers of the
527 * associations that are part of the endpoint indicating that a list of local
528 * addresses are added to the endpoint.
530 * If any of the addresses is already in the bind address list of the
531 * association, we do not send the chunk for that association. But it will not
532 * affect other associations.
534 * Only sctp_setsockopt_bindx() is supposed to call this function.
536 static int sctp_send_asconf_add_ip(struct sock
*sk
,
537 struct sockaddr
*addrs
,
540 struct net
*net
= sock_net(sk
);
541 struct sctp_sock
*sp
;
542 struct sctp_endpoint
*ep
;
543 struct sctp_association
*asoc
;
544 struct sctp_bind_addr
*bp
;
545 struct sctp_chunk
*chunk
;
546 struct sctp_sockaddr_entry
*laddr
;
547 union sctp_addr
*addr
;
548 union sctp_addr saveaddr
;
555 if (!net
->sctp
.addip_enable
)
561 pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n",
562 __func__
, sk
, addrs
, addrcnt
);
564 list_for_each_entry(asoc
, &ep
->asocs
, asocs
) {
565 if (!asoc
->peer
.asconf_capable
)
568 if (asoc
->peer
.addip_disabled_mask
& SCTP_PARAM_ADD_IP
)
571 if (!sctp_state(asoc
, ESTABLISHED
))
574 /* Check if any address in the packed array of addresses is
575 * in the bind address list of the association. If so,
576 * do not send the asconf chunk to its peer, but continue with
577 * other associations.
580 for (i
= 0; i
< addrcnt
; i
++) {
582 af
= sctp_get_af_specific(addr
->v4
.sin_family
);
588 if (sctp_assoc_lookup_laddr(asoc
, addr
))
591 addr_buf
+= af
->sockaddr_len
;
596 /* Use the first valid address in bind addr list of
597 * association as Address Parameter of ASCONF CHUNK.
599 bp
= &asoc
->base
.bind_addr
;
600 p
= bp
->address_list
.next
;
601 laddr
= list_entry(p
, struct sctp_sockaddr_entry
, list
);
602 chunk
= sctp_make_asconf_update_ip(asoc
, &laddr
->a
, addrs
,
603 addrcnt
, SCTP_PARAM_ADD_IP
);
609 /* Add the new addresses to the bind address list with
610 * use_as_src set to 0.
613 for (i
= 0; i
< addrcnt
; i
++) {
615 af
= sctp_get_af_specific(addr
->v4
.sin_family
);
616 memcpy(&saveaddr
, addr
, af
->sockaddr_len
);
617 retval
= sctp_add_bind_addr(bp
, &saveaddr
,
619 SCTP_ADDR_NEW
, GFP_ATOMIC
);
620 addr_buf
+= af
->sockaddr_len
;
622 if (asoc
->src_out_of_asoc_ok
) {
623 struct sctp_transport
*trans
;
625 list_for_each_entry(trans
,
626 &asoc
->peer
.transport_addr_list
, transports
) {
627 /* Clear the source and route cache */
628 sctp_transport_dst_release(trans
);
629 trans
->cwnd
= min(4*asoc
->pathmtu
, max_t(__u32
,
630 2*asoc
->pathmtu
, 4380));
631 trans
->ssthresh
= asoc
->peer
.i
.a_rwnd
;
632 trans
->rto
= asoc
->rto_initial
;
633 sctp_max_rto(asoc
, trans
);
634 trans
->rtt
= trans
->srtt
= trans
->rttvar
= 0;
635 sctp_transport_route(trans
, NULL
,
636 sctp_sk(asoc
->base
.sk
));
639 retval
= sctp_send_asconf(asoc
, chunk
);
646 /* Remove a list of addresses from bind addresses list. Do not remove the
649 * Basically run through each address specified in the addrs/addrcnt
650 * array/length pair, determine if it is IPv6 or IPv4 and call
651 * sctp_del_bind() on it.
653 * If any of them fails, then the operation will be reversed and the
654 * ones that were removed will be added back.
656 * At least one address has to be left; if only one address is
657 * available, the operation will return -EBUSY.
659 * Only sctp_setsockopt_bindx() is supposed to call this function.
661 static int sctp_bindx_rem(struct sock
*sk
, struct sockaddr
*addrs
, int addrcnt
)
663 struct sctp_sock
*sp
= sctp_sk(sk
);
664 struct sctp_endpoint
*ep
= sp
->ep
;
666 struct sctp_bind_addr
*bp
= &ep
->base
.bind_addr
;
669 union sctp_addr
*sa_addr
;
672 pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n",
673 __func__
, sk
, addrs
, addrcnt
);
676 for (cnt
= 0; cnt
< addrcnt
; cnt
++) {
677 /* If the bind address list is empty or if there is only one
678 * bind address, there is nothing more to be removed (we need
679 * at least one address here).
681 if (list_empty(&bp
->address_list
) ||
682 (sctp_list_single_entry(&bp
->address_list
))) {
688 af
= sctp_get_af_specific(sa_addr
->sa
.sa_family
);
694 if (!af
->addr_valid(sa_addr
, sp
, NULL
)) {
695 retval
= -EADDRNOTAVAIL
;
699 if (sa_addr
->v4
.sin_port
&&
700 sa_addr
->v4
.sin_port
!= htons(bp
->port
)) {
705 if (!sa_addr
->v4
.sin_port
)
706 sa_addr
->v4
.sin_port
= htons(bp
->port
);
708 /* FIXME - There is probably a need to check if sk->sk_saddr and
709 * sk->sk_rcv_addr are currently set to one of the addresses to
710 * be removed. This is something which needs to be looked into
711 * when we are fixing the outstanding issues with multi-homing
712 * socket routing and failover schemes. Refer to comments in
713 * sctp_do_bind(). -daisy
715 retval
= sctp_del_bind_addr(bp
, sa_addr
);
717 addr_buf
+= af
->sockaddr_len
;
720 /* Failed. Add the ones that has been removed back */
722 sctp_bindx_add(sk
, addrs
, cnt
);
730 /* Send an ASCONF chunk with Delete IP address parameters to all the peers of
731 * the associations that are part of the endpoint indicating that a list of
732 * local addresses are removed from the endpoint.
734 * If any of the addresses is already in the bind address list of the
735 * association, we do not send the chunk for that association. But it will not
736 * affect other associations.
738 * Only sctp_setsockopt_bindx() is supposed to call this function.
740 static int sctp_send_asconf_del_ip(struct sock
*sk
,
741 struct sockaddr
*addrs
,
744 struct net
*net
= sock_net(sk
);
745 struct sctp_sock
*sp
;
746 struct sctp_endpoint
*ep
;
747 struct sctp_association
*asoc
;
748 struct sctp_transport
*transport
;
749 struct sctp_bind_addr
*bp
;
750 struct sctp_chunk
*chunk
;
751 union sctp_addr
*laddr
;
754 struct sctp_sockaddr_entry
*saddr
;
760 if (!net
->sctp
.addip_enable
)
766 pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n",
767 __func__
, sk
, addrs
, addrcnt
);
769 list_for_each_entry(asoc
, &ep
->asocs
, asocs
) {
771 if (!asoc
->peer
.asconf_capable
)
774 if (asoc
->peer
.addip_disabled_mask
& SCTP_PARAM_DEL_IP
)
777 if (!sctp_state(asoc
, ESTABLISHED
))
780 /* Check if any address in the packed array of addresses is
781 * not present in the bind address list of the association.
782 * If so, do not send the asconf chunk to its peer, but
783 * continue with other associations.
786 for (i
= 0; i
< addrcnt
; i
++) {
788 af
= sctp_get_af_specific(laddr
->v4
.sin_family
);
794 if (!sctp_assoc_lookup_laddr(asoc
, laddr
))
797 addr_buf
+= af
->sockaddr_len
;
802 /* Find one address in the association's bind address list
803 * that is not in the packed array of addresses. This is to
804 * make sure that we do not delete all the addresses in the
807 bp
= &asoc
->base
.bind_addr
;
808 laddr
= sctp_find_unmatch_addr(bp
, (union sctp_addr
*)addrs
,
810 if ((laddr
== NULL
) && (addrcnt
== 1)) {
811 if (asoc
->asconf_addr_del_pending
)
813 asoc
->asconf_addr_del_pending
=
814 kzalloc(sizeof(union sctp_addr
), GFP_ATOMIC
);
815 if (asoc
->asconf_addr_del_pending
== NULL
) {
819 asoc
->asconf_addr_del_pending
->sa
.sa_family
=
821 asoc
->asconf_addr_del_pending
->v4
.sin_port
=
823 if (addrs
->sa_family
== AF_INET
) {
824 struct sockaddr_in
*sin
;
826 sin
= (struct sockaddr_in
*)addrs
;
827 asoc
->asconf_addr_del_pending
->v4
.sin_addr
.s_addr
= sin
->sin_addr
.s_addr
;
828 } else if (addrs
->sa_family
== AF_INET6
) {
829 struct sockaddr_in6
*sin6
;
831 sin6
= (struct sockaddr_in6
*)addrs
;
832 asoc
->asconf_addr_del_pending
->v6
.sin6_addr
= sin6
->sin6_addr
;
835 pr_debug("%s: keep the last address asoc:%p %pISc at %p\n",
836 __func__
, asoc
, &asoc
->asconf_addr_del_pending
->sa
,
837 asoc
->asconf_addr_del_pending
);
839 asoc
->src_out_of_asoc_ok
= 1;
847 /* We do not need RCU protection throughout this loop
848 * because this is done under a socket lock from the
851 chunk
= sctp_make_asconf_update_ip(asoc
, laddr
, addrs
, addrcnt
,
859 /* Reset use_as_src flag for the addresses in the bind address
860 * list that are to be deleted.
863 for (i
= 0; i
< addrcnt
; i
++) {
865 af
= sctp_get_af_specific(laddr
->v4
.sin_family
);
866 list_for_each_entry(saddr
, &bp
->address_list
, list
) {
867 if (sctp_cmp_addr_exact(&saddr
->a
, laddr
))
868 saddr
->state
= SCTP_ADDR_DEL
;
870 addr_buf
+= af
->sockaddr_len
;
873 /* Update the route and saddr entries for all the transports
874 * as some of the addresses in the bind address list are
875 * about to be deleted and cannot be used as source addresses.
877 list_for_each_entry(transport
, &asoc
->peer
.transport_addr_list
,
879 sctp_transport_dst_release(transport
);
880 sctp_transport_route(transport
, NULL
,
881 sctp_sk(asoc
->base
.sk
));
885 /* We don't need to transmit ASCONF */
887 retval
= sctp_send_asconf(asoc
, chunk
);
893 /* set addr events to assocs in the endpoint. ep and addr_wq must be locked */
894 int sctp_asconf_mgmt(struct sctp_sock
*sp
, struct sctp_sockaddr_entry
*addrw
)
896 struct sock
*sk
= sctp_opt2sk(sp
);
897 union sctp_addr
*addr
;
900 /* It is safe to write port space in caller. */
902 addr
->v4
.sin_port
= htons(sp
->ep
->base
.bind_addr
.port
);
903 af
= sctp_get_af_specific(addr
->sa
.sa_family
);
906 if (sctp_verify_addr(sk
, addr
, af
->sockaddr_len
))
909 if (addrw
->state
== SCTP_ADDR_NEW
)
910 return sctp_send_asconf_add_ip(sk
, (struct sockaddr
*)addr
, 1);
912 return sctp_send_asconf_del_ip(sk
, (struct sockaddr
*)addr
, 1);
915 /* Helper for tunneling sctp_bindx() requests through sctp_setsockopt()
918 * int sctp_bindx(int sd, struct sockaddr *addrs, int addrcnt,
921 * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses.
922 * If the sd is an IPv6 socket, the addresses passed can either be IPv4
925 * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see
926 * Section 3.1.2 for this usage.
928 * addrs is a pointer to an array of one or more socket addresses. Each
929 * address is contained in its appropriate structure (i.e. struct
930 * sockaddr_in or struct sockaddr_in6) the family of the address type
931 * must be used to distinguish the address length (note that this
932 * representation is termed a "packed array" of addresses). The caller
933 * specifies the number of addresses in the array with addrcnt.
935 * On success, sctp_bindx() returns 0. On failure, sctp_bindx() returns
936 * -1, and sets errno to the appropriate error code.
938 * For SCTP, the port given in each socket address must be the same, or
939 * sctp_bindx() will fail, setting errno to EINVAL.
941 * The flags parameter is formed from the bitwise OR of zero or more of
942 * the following currently defined flags:
944 * SCTP_BINDX_ADD_ADDR
946 * SCTP_BINDX_REM_ADDR
948 * SCTP_BINDX_ADD_ADDR directs SCTP to add the given addresses to the
949 * association, and SCTP_BINDX_REM_ADDR directs SCTP to remove the given
950 * addresses from the association. The two flags are mutually exclusive;
951 * if both are given, sctp_bindx() will fail with EINVAL. A caller may
952 * not remove all addresses from an association; sctp_bindx() will
953 * reject such an attempt with EINVAL.
955 * An application can use sctp_bindx(SCTP_BINDX_ADD_ADDR) to associate
956 * additional addresses with an endpoint after calling bind(). Or use
957 * sctp_bindx(SCTP_BINDX_REM_ADDR) to remove some addresses a listening
958 * socket is associated with so that no new association accepted will be
959 * associated with those addresses. If the endpoint supports dynamic
960 * address a SCTP_BINDX_REM_ADDR or SCTP_BINDX_ADD_ADDR may cause a
961 * endpoint to send the appropriate message to the peer to change the
962 * peers address lists.
964 * Adding and removing addresses from a connected association is
965 * optional functionality. Implementations that do not support this
966 * functionality should return EOPNOTSUPP.
968 * Basically do nothing but copying the addresses from user to kernel
969 * land and invoking either sctp_bindx_add() or sctp_bindx_rem() on the sk.
970 * This is used for tunneling the sctp_bindx() request through sctp_setsockopt()
973 * We don't use copy_from_user() for optimization: we first do the
974 * sanity checks (buffer size -fast- and access check-healthy
975 * pointer); if all of those succeed, then we can alloc the memory
976 * (expensive operation) needed to copy the data to kernel. Then we do
977 * the copying without checking the user space area
978 * (__copy_from_user()).
980 * On exit there is no need to do sockfd_put(), sys_setsockopt() does
983 * sk The sk of the socket
984 * addrs The pointer to the addresses in user land
985 * addrssize Size of the addrs buffer
986 * op Operation to perform (add or remove, see the flags of
989 * Returns 0 if ok, <0 errno code on error.
991 static int sctp_setsockopt_bindx(struct sock
*sk
,
992 struct sockaddr __user
*addrs
,
993 int addrs_size
, int op
)
995 struct sockaddr
*kaddrs
;
999 struct sockaddr
*sa_addr
;
1003 pr_debug("%s: sk:%p addrs:%p addrs_size:%d opt:%d\n",
1004 __func__
, sk
, addrs
, addrs_size
, op
);
1006 if (unlikely(addrs_size
<= 0))
1009 /* Check the user passed a healthy pointer. */
1010 if (unlikely(!access_ok(VERIFY_READ
, addrs
, addrs_size
)))
1013 /* Alloc space for the address array in kernel memory. */
1014 kaddrs
= kmalloc(addrs_size
, GFP_USER
| __GFP_NOWARN
);
1015 if (unlikely(!kaddrs
))
1018 if (__copy_from_user(kaddrs
, addrs
, addrs_size
)) {
1023 /* Walk through the addrs buffer and count the number of addresses. */
1025 while (walk_size
< addrs_size
) {
1026 if (walk_size
+ sizeof(sa_family_t
) > addrs_size
) {
1032 af
= sctp_get_af_specific(sa_addr
->sa_family
);
1034 /* If the address family is not supported or if this address
1035 * causes the address buffer to overflow return EINVAL.
1037 if (!af
|| (walk_size
+ af
->sockaddr_len
) > addrs_size
) {
1042 addr_buf
+= af
->sockaddr_len
;
1043 walk_size
+= af
->sockaddr_len
;
1048 case SCTP_BINDX_ADD_ADDR
:
1049 err
= sctp_bindx_add(sk
, kaddrs
, addrcnt
);
1052 err
= sctp_send_asconf_add_ip(sk
, kaddrs
, addrcnt
);
1055 case SCTP_BINDX_REM_ADDR
:
1056 err
= sctp_bindx_rem(sk
, kaddrs
, addrcnt
);
1059 err
= sctp_send_asconf_del_ip(sk
, kaddrs
, addrcnt
);
1073 /* __sctp_connect(struct sock* sk, struct sockaddr *kaddrs, int addrs_size)
1075 * Common routine for handling connect() and sctp_connectx().
1076 * Connect will come in with just a single address.
1078 static int __sctp_connect(struct sock
*sk
,
1079 struct sockaddr
*kaddrs
,
1081 sctp_assoc_t
*assoc_id
)
1083 struct net
*net
= sock_net(sk
);
1084 struct sctp_sock
*sp
;
1085 struct sctp_endpoint
*ep
;
1086 struct sctp_association
*asoc
= NULL
;
1087 struct sctp_association
*asoc2
;
1088 struct sctp_transport
*transport
;
1090 enum sctp_scope scope
;
1095 union sctp_addr
*sa_addr
= NULL
;
1097 unsigned short port
;
1098 unsigned int f_flags
= 0;
1103 /* connect() cannot be done on a socket that is already in ESTABLISHED
1104 * state - UDP-style peeled off socket or a TCP-style socket that
1105 * is already connected.
1106 * It cannot be done even on a TCP-style listening socket.
1108 if (sctp_sstate(sk
, ESTABLISHED
) || sctp_sstate(sk
, CLOSING
) ||
1109 (sctp_style(sk
, TCP
) && sctp_sstate(sk
, LISTENING
))) {
1114 /* Walk through the addrs buffer and count the number of addresses. */
1116 while (walk_size
< addrs_size
) {
1119 if (walk_size
+ sizeof(sa_family_t
) > addrs_size
) {
1125 af
= sctp_get_af_specific(sa_addr
->sa
.sa_family
);
1127 /* If the address family is not supported or if this address
1128 * causes the address buffer to overflow return EINVAL.
1130 if (!af
|| (walk_size
+ af
->sockaddr_len
) > addrs_size
) {
1135 port
= ntohs(sa_addr
->v4
.sin_port
);
1137 /* Save current address so we can work with it */
1138 memcpy(&to
, sa_addr
, af
->sockaddr_len
);
1140 err
= sctp_verify_addr(sk
, &to
, af
->sockaddr_len
);
1144 /* Make sure the destination port is correctly set
1147 if (asoc
&& asoc
->peer
.port
&& asoc
->peer
.port
!= port
) {
1152 /* Check if there already is a matching association on the
1153 * endpoint (other than the one created here).
1155 asoc2
= sctp_endpoint_lookup_assoc(ep
, &to
, &transport
);
1156 if (asoc2
&& asoc2
!= asoc
) {
1157 if (asoc2
->state
>= SCTP_STATE_ESTABLISHED
)
1164 /* If we could not find a matching association on the endpoint,
1165 * make sure that there is no peeled-off association matching
1166 * the peer address even on another socket.
1168 if (sctp_endpoint_is_peeled_off(ep
, &to
)) {
1169 err
= -EADDRNOTAVAIL
;
1174 /* If a bind() or sctp_bindx() is not called prior to
1175 * an sctp_connectx() call, the system picks an
1176 * ephemeral port and will choose an address set
1177 * equivalent to binding with a wildcard address.
1179 if (!ep
->base
.bind_addr
.port
) {
1180 if (sctp_autobind(sk
)) {
1186 * If an unprivileged user inherits a 1-many
1187 * style socket with open associations on a
1188 * privileged port, it MAY be permitted to
1189 * accept new associations, but it SHOULD NOT
1190 * be permitted to open new associations.
1192 if (ep
->base
.bind_addr
.port
<
1193 inet_prot_sock(net
) &&
1194 !ns_capable(net
->user_ns
,
1195 CAP_NET_BIND_SERVICE
)) {
1201 scope
= sctp_scope(&to
);
1202 asoc
= sctp_association_new(ep
, sk
, scope
, GFP_KERNEL
);
1208 err
= sctp_assoc_set_bind_addr_from_ep(asoc
, scope
,
1216 /* Prime the peer's transport structures. */
1217 transport
= sctp_assoc_add_peer(asoc
, &to
, GFP_KERNEL
,
1225 addr_buf
+= af
->sockaddr_len
;
1226 walk_size
+= af
->sockaddr_len
;
1229 /* In case the user of sctp_connectx() wants an association
1230 * id back, assign one now.
1233 err
= sctp_assoc_set_id(asoc
, GFP_KERNEL
);
1238 err
= sctp_primitive_ASSOCIATE(net
, asoc
, NULL
);
1243 /* Initialize sk's dport and daddr for getpeername() */
1244 inet_sk(sk
)->inet_dport
= htons(asoc
->peer
.port
);
1245 sp
->pf
->to_sk_daddr(sa_addr
, sk
);
1248 /* in-kernel sockets don't generally have a file allocated to them
1249 * if all they do is call sock_create_kern().
1251 if (sk
->sk_socket
->file
)
1252 f_flags
= sk
->sk_socket
->file
->f_flags
;
1254 timeo
= sock_sndtimeo(sk
, f_flags
& O_NONBLOCK
);
1257 *assoc_id
= asoc
->assoc_id
;
1258 err
= sctp_wait_for_connect(asoc
, &timeo
);
1259 /* Note: the asoc may be freed after the return of
1260 * sctp_wait_for_connect.
1263 /* Don't free association on exit. */
1267 pr_debug("%s: took out_free path with asoc:%p kaddrs:%p err:%d\n",
1268 __func__
, asoc
, kaddrs
, err
);
1271 /* sctp_primitive_ASSOCIATE may have added this association
1272 * To the hash table, try to unhash it, just in case, its a noop
1273 * if it wasn't hashed so we're safe
1275 sctp_association_free(asoc
);
1280 /* Helper for tunneling sctp_connectx() requests through sctp_setsockopt()
1283 * int sctp_connectx(int sd, struct sockaddr *addrs, int addrcnt,
1284 * sctp_assoc_t *asoc);
1286 * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses.
1287 * If the sd is an IPv6 socket, the addresses passed can either be IPv4
1288 * or IPv6 addresses.
1290 * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see
1291 * Section 3.1.2 for this usage.
1293 * addrs is a pointer to an array of one or more socket addresses. Each
1294 * address is contained in its appropriate structure (i.e. struct
1295 * sockaddr_in or struct sockaddr_in6) the family of the address type
1296 * must be used to distengish the address length (note that this
1297 * representation is termed a "packed array" of addresses). The caller
1298 * specifies the number of addresses in the array with addrcnt.
1300 * On success, sctp_connectx() returns 0. It also sets the assoc_id to
1301 * the association id of the new association. On failure, sctp_connectx()
1302 * returns -1, and sets errno to the appropriate error code. The assoc_id
1303 * is not touched by the kernel.
1305 * For SCTP, the port given in each socket address must be the same, or
1306 * sctp_connectx() will fail, setting errno to EINVAL.
1308 * An application can use sctp_connectx to initiate an association with
1309 * an endpoint that is multi-homed. Much like sctp_bindx() this call
1310 * allows a caller to specify multiple addresses at which a peer can be
1311 * reached. The way the SCTP stack uses the list of addresses to set up
1312 * the association is implementation dependent. This function only
1313 * specifies that the stack will try to make use of all the addresses in
1314 * the list when needed.
1316 * Note that the list of addresses passed in is only used for setting up
1317 * the association. It does not necessarily equal the set of addresses
1318 * the peer uses for the resulting association. If the caller wants to
1319 * find out the set of peer addresses, it must use sctp_getpaddrs() to
1320 * retrieve them after the association has been set up.
1322 * Basically do nothing but copying the addresses from user to kernel
1323 * land and invoking either sctp_connectx(). This is used for tunneling
1324 * the sctp_connectx() request through sctp_setsockopt() from userspace.
1326 * We don't use copy_from_user() for optimization: we first do the
1327 * sanity checks (buffer size -fast- and access check-healthy
1328 * pointer); if all of those succeed, then we can alloc the memory
1329 * (expensive operation) needed to copy the data to kernel. Then we do
1330 * the copying without checking the user space area
1331 * (__copy_from_user()).
1333 * On exit there is no need to do sockfd_put(), sys_setsockopt() does
1336 * sk The sk of the socket
1337 * addrs The pointer to the addresses in user land
1338 * addrssize Size of the addrs buffer
1340 * Returns >=0 if ok, <0 errno code on error.
1342 static int __sctp_setsockopt_connectx(struct sock
*sk
,
1343 struct sockaddr __user
*addrs
,
1345 sctp_assoc_t
*assoc_id
)
1347 struct sockaddr
*kaddrs
;
1348 gfp_t gfp
= GFP_KERNEL
;
1351 pr_debug("%s: sk:%p addrs:%p addrs_size:%d\n",
1352 __func__
, sk
, addrs
, addrs_size
);
1354 if (unlikely(addrs_size
<= 0))
1357 /* Check the user passed a healthy pointer. */
1358 if (unlikely(!access_ok(VERIFY_READ
, addrs
, addrs_size
)))
1361 /* Alloc space for the address array in kernel memory. */
1362 if (sk
->sk_socket
->file
)
1363 gfp
= GFP_USER
| __GFP_NOWARN
;
1364 kaddrs
= kmalloc(addrs_size
, gfp
);
1365 if (unlikely(!kaddrs
))
1368 if (__copy_from_user(kaddrs
, addrs
, addrs_size
)) {
1371 err
= __sctp_connect(sk
, kaddrs
, addrs_size
, assoc_id
);
1380 * This is an older interface. It's kept for backward compatibility
1381 * to the option that doesn't provide association id.
1383 static int sctp_setsockopt_connectx_old(struct sock
*sk
,
1384 struct sockaddr __user
*addrs
,
1387 return __sctp_setsockopt_connectx(sk
, addrs
, addrs_size
, NULL
);
1391 * New interface for the API. The since the API is done with a socket
1392 * option, to make it simple we feed back the association id is as a return
1393 * indication to the call. Error is always negative and association id is
1396 static int sctp_setsockopt_connectx(struct sock
*sk
,
1397 struct sockaddr __user
*addrs
,
1400 sctp_assoc_t assoc_id
= 0;
1403 err
= __sctp_setsockopt_connectx(sk
, addrs
, addrs_size
, &assoc_id
);
1412 * New (hopefully final) interface for the API.
1413 * We use the sctp_getaddrs_old structure so that use-space library
1414 * can avoid any unnecessary allocations. The only different part
1415 * is that we store the actual length of the address buffer into the
1416 * addrs_num structure member. That way we can re-use the existing
1419 #ifdef CONFIG_COMPAT
1420 struct compat_sctp_getaddrs_old
{
1421 sctp_assoc_t assoc_id
;
1423 compat_uptr_t addrs
; /* struct sockaddr * */
1427 static int sctp_getsockopt_connectx3(struct sock
*sk
, int len
,
1428 char __user
*optval
,
1431 struct sctp_getaddrs_old param
;
1432 sctp_assoc_t assoc_id
= 0;
1435 #ifdef CONFIG_COMPAT
1436 if (in_compat_syscall()) {
1437 struct compat_sctp_getaddrs_old param32
;
1439 if (len
< sizeof(param32
))
1441 if (copy_from_user(¶m32
, optval
, sizeof(param32
)))
1444 param
.assoc_id
= param32
.assoc_id
;
1445 param
.addr_num
= param32
.addr_num
;
1446 param
.addrs
= compat_ptr(param32
.addrs
);
1450 if (len
< sizeof(param
))
1452 if (copy_from_user(¶m
, optval
, sizeof(param
)))
1456 err
= __sctp_setsockopt_connectx(sk
, (struct sockaddr __user
*)
1457 param
.addrs
, param
.addr_num
,
1459 if (err
== 0 || err
== -EINPROGRESS
) {
1460 if (copy_to_user(optval
, &assoc_id
, sizeof(assoc_id
)))
1462 if (put_user(sizeof(assoc_id
), optlen
))
1469 /* API 3.1.4 close() - UDP Style Syntax
1470 * Applications use close() to perform graceful shutdown (as described in
1471 * Section 10.1 of [SCTP]) on ALL the associations currently represented
1472 * by a UDP-style socket.
1476 * ret = close(int sd);
1478 * sd - the socket descriptor of the associations to be closed.
1480 * To gracefully shutdown a specific association represented by the
1481 * UDP-style socket, an application should use the sendmsg() call,
1482 * passing no user data, but including the appropriate flag in the
1483 * ancillary data (see Section xxxx).
1485 * If sd in the close() call is a branched-off socket representing only
1486 * one association, the shutdown is performed on that association only.
1488 * 4.1.6 close() - TCP Style Syntax
1490 * Applications use close() to gracefully close down an association.
1494 * int close(int sd);
1496 * sd - the socket descriptor of the association to be closed.
1498 * After an application calls close() on a socket descriptor, no further
1499 * socket operations will succeed on that descriptor.
1501 * API 7.1.4 SO_LINGER
1503 * An application using the TCP-style socket can use this option to
1504 * perform the SCTP ABORT primitive. The linger option structure is:
1507 * int l_onoff; // option on/off
1508 * int l_linger; // linger time
1511 * To enable the option, set l_onoff to 1. If the l_linger value is set
1512 * to 0, calling close() is the same as the ABORT primitive. If the
1513 * value is set to a negative value, the setsockopt() call will return
1514 * an error. If the value is set to a positive value linger_time, the
1515 * close() can be blocked for at most linger_time ms. If the graceful
1516 * shutdown phase does not finish during this period, close() will
1517 * return but the graceful shutdown phase continues in the system.
1519 static void sctp_close(struct sock
*sk
, long timeout
)
1521 struct net
*net
= sock_net(sk
);
1522 struct sctp_endpoint
*ep
;
1523 struct sctp_association
*asoc
;
1524 struct list_head
*pos
, *temp
;
1525 unsigned int data_was_unread
;
1527 pr_debug("%s: sk:%p, timeout:%ld\n", __func__
, sk
, timeout
);
1529 lock_sock_nested(sk
, SINGLE_DEPTH_NESTING
);
1530 sk
->sk_shutdown
= SHUTDOWN_MASK
;
1531 sk
->sk_state
= SCTP_SS_CLOSING
;
1533 ep
= sctp_sk(sk
)->ep
;
1535 /* Clean up any skbs sitting on the receive queue. */
1536 data_was_unread
= sctp_queue_purge_ulpevents(&sk
->sk_receive_queue
);
1537 data_was_unread
+= sctp_queue_purge_ulpevents(&sctp_sk(sk
)->pd_lobby
);
1539 /* Walk all associations on an endpoint. */
1540 list_for_each_safe(pos
, temp
, &ep
->asocs
) {
1541 asoc
= list_entry(pos
, struct sctp_association
, asocs
);
1543 if (sctp_style(sk
, TCP
)) {
1544 /* A closed association can still be in the list if
1545 * it belongs to a TCP-style listening socket that is
1546 * not yet accepted. If so, free it. If not, send an
1547 * ABORT or SHUTDOWN based on the linger options.
1549 if (sctp_state(asoc
, CLOSED
)) {
1550 sctp_association_free(asoc
);
1555 if (data_was_unread
|| !skb_queue_empty(&asoc
->ulpq
.lobby
) ||
1556 !skb_queue_empty(&asoc
->ulpq
.reasm
) ||
1557 (sock_flag(sk
, SOCK_LINGER
) && !sk
->sk_lingertime
)) {
1558 struct sctp_chunk
*chunk
;
1560 chunk
= sctp_make_abort_user(asoc
, NULL
, 0);
1561 sctp_primitive_ABORT(net
, asoc
, chunk
);
1563 sctp_primitive_SHUTDOWN(net
, asoc
, NULL
);
1566 /* On a TCP-style socket, block for at most linger_time if set. */
1567 if (sctp_style(sk
, TCP
) && timeout
)
1568 sctp_wait_for_close(sk
, timeout
);
1570 /* This will run the backlog queue. */
1573 /* Supposedly, no process has access to the socket, but
1574 * the net layers still may.
1575 * Also, sctp_destroy_sock() needs to be called with addr_wq_lock
1576 * held and that should be grabbed before socket lock.
1578 spin_lock_bh(&net
->sctp
.addr_wq_lock
);
1579 bh_lock_sock_nested(sk
);
1581 /* Hold the sock, since sk_common_release() will put sock_put()
1582 * and we have just a little more cleanup.
1585 sk_common_release(sk
);
1588 spin_unlock_bh(&net
->sctp
.addr_wq_lock
);
1592 SCTP_DBG_OBJCNT_DEC(sock
);
1595 /* Handle EPIPE error. */
1596 static int sctp_error(struct sock
*sk
, int flags
, int err
)
1599 err
= sock_error(sk
) ? : -EPIPE
;
1600 if (err
== -EPIPE
&& !(flags
& MSG_NOSIGNAL
))
1601 send_sig(SIGPIPE
, current
, 0);
1605 /* API 3.1.3 sendmsg() - UDP Style Syntax
1607 * An application uses sendmsg() and recvmsg() calls to transmit data to
1608 * and receive data from its peer.
1610 * ssize_t sendmsg(int socket, const struct msghdr *message,
1613 * socket - the socket descriptor of the endpoint.
1614 * message - pointer to the msghdr structure which contains a single
1615 * user message and possibly some ancillary data.
1617 * See Section 5 for complete description of the data
1620 * flags - flags sent or received with the user message, see Section
1621 * 5 for complete description of the flags.
1623 * Note: This function could use a rewrite especially when explicit
1624 * connect support comes in.
1626 /* BUG: We do not implement the equivalent of sk_stream_wait_memory(). */
1628 static int sctp_msghdr_parse(const struct msghdr
*msg
,
1629 struct sctp_cmsgs
*cmsgs
);
1631 static int sctp_sendmsg(struct sock
*sk
, struct msghdr
*msg
, size_t msg_len
)
1633 struct net
*net
= sock_net(sk
);
1634 struct sctp_sock
*sp
;
1635 struct sctp_endpoint
*ep
;
1636 struct sctp_association
*new_asoc
= NULL
, *asoc
= NULL
;
1637 struct sctp_transport
*transport
, *chunk_tp
;
1638 struct sctp_chunk
*chunk
;
1640 struct sockaddr
*msg_name
= NULL
;
1641 struct sctp_sndrcvinfo default_sinfo
;
1642 struct sctp_sndrcvinfo
*sinfo
;
1643 struct sctp_initmsg
*sinit
;
1644 sctp_assoc_t associd
= 0;
1645 struct sctp_cmsgs cmsgs
= { NULL
};
1646 enum sctp_scope scope
;
1647 bool fill_sinfo_ttl
= false, wait_connect
= false;
1648 struct sctp_datamsg
*datamsg
;
1649 int msg_flags
= msg
->msg_flags
;
1650 __u16 sinfo_flags
= 0;
1658 pr_debug("%s: sk:%p, msg:%p, msg_len:%zu ep:%p\n", __func__
, sk
,
1661 /* We cannot send a message over a TCP-style listening socket. */
1662 if (sctp_style(sk
, TCP
) && sctp_sstate(sk
, LISTENING
)) {
1667 /* Parse out the SCTP CMSGs. */
1668 err
= sctp_msghdr_parse(msg
, &cmsgs
);
1670 pr_debug("%s: msghdr parse err:%x\n", __func__
, err
);
1674 /* Fetch the destination address for this packet. This
1675 * address only selects the association--it is not necessarily
1676 * the address we will send to.
1677 * For a peeled-off socket, msg_name is ignored.
1679 if (!sctp_style(sk
, UDP_HIGH_BANDWIDTH
) && msg
->msg_name
) {
1680 int msg_namelen
= msg
->msg_namelen
;
1682 err
= sctp_verify_addr(sk
, (union sctp_addr
*)msg
->msg_name
,
1687 if (msg_namelen
> sizeof(to
))
1688 msg_namelen
= sizeof(to
);
1689 memcpy(&to
, msg
->msg_name
, msg_namelen
);
1690 msg_name
= msg
->msg_name
;
1694 if (cmsgs
.sinfo
!= NULL
) {
1695 memset(&default_sinfo
, 0, sizeof(default_sinfo
));
1696 default_sinfo
.sinfo_stream
= cmsgs
.sinfo
->snd_sid
;
1697 default_sinfo
.sinfo_flags
= cmsgs
.sinfo
->snd_flags
;
1698 default_sinfo
.sinfo_ppid
= cmsgs
.sinfo
->snd_ppid
;
1699 default_sinfo
.sinfo_context
= cmsgs
.sinfo
->snd_context
;
1700 default_sinfo
.sinfo_assoc_id
= cmsgs
.sinfo
->snd_assoc_id
;
1702 sinfo
= &default_sinfo
;
1703 fill_sinfo_ttl
= true;
1705 sinfo
= cmsgs
.srinfo
;
1707 /* Did the user specify SNDINFO/SNDRCVINFO? */
1709 sinfo_flags
= sinfo
->sinfo_flags
;
1710 associd
= sinfo
->sinfo_assoc_id
;
1713 pr_debug("%s: msg_len:%zu, sinfo_flags:0x%x\n", __func__
,
1714 msg_len
, sinfo_flags
);
1716 /* SCTP_EOF or SCTP_ABORT cannot be set on a TCP-style socket. */
1717 if (sctp_style(sk
, TCP
) && (sinfo_flags
& (SCTP_EOF
| SCTP_ABORT
))) {
1722 /* If SCTP_EOF is set, no data can be sent. Disallow sending zero
1723 * length messages when SCTP_EOF|SCTP_ABORT is not set.
1724 * If SCTP_ABORT is set, the message length could be non zero with
1725 * the msg_iov set to the user abort reason.
1727 if (((sinfo_flags
& SCTP_EOF
) && (msg_len
> 0)) ||
1728 (!(sinfo_flags
& (SCTP_EOF
|SCTP_ABORT
)) && (msg_len
== 0))) {
1733 /* If SCTP_ADDR_OVER is set, there must be an address
1734 * specified in msg_name.
1736 if ((sinfo_flags
& SCTP_ADDR_OVER
) && (!msg
->msg_name
)) {
1743 pr_debug("%s: about to look up association\n", __func__
);
1747 /* If a msg_name has been specified, assume this is to be used. */
1749 /* Look for a matching association on the endpoint. */
1750 asoc
= sctp_endpoint_lookup_assoc(ep
, &to
, &transport
);
1752 /* If we could not find a matching association on the
1753 * endpoint, make sure that it is not a TCP-style
1754 * socket that already has an association or there is
1755 * no peeled-off association on another socket.
1758 ((sctp_style(sk
, TCP
) &&
1759 (sctp_sstate(sk
, ESTABLISHED
) ||
1760 sctp_sstate(sk
, CLOSING
))) ||
1761 sctp_endpoint_is_peeled_off(ep
, &to
))) {
1762 err
= -EADDRNOTAVAIL
;
1766 asoc
= sctp_id2assoc(sk
, associd
);
1774 pr_debug("%s: just looked up association:%p\n", __func__
, asoc
);
1776 /* We cannot send a message on a TCP-style SCTP_SS_ESTABLISHED
1777 * socket that has an association in CLOSED state. This can
1778 * happen when an accepted socket has an association that is
1781 if (sctp_state(asoc
, CLOSED
) && sctp_style(sk
, TCP
)) {
1786 if (sinfo_flags
& SCTP_EOF
) {
1787 pr_debug("%s: shutting down association:%p\n",
1790 sctp_primitive_SHUTDOWN(net
, asoc
, NULL
);
1794 if (sinfo_flags
& SCTP_ABORT
) {
1796 chunk
= sctp_make_abort_user(asoc
, msg
, msg_len
);
1802 pr_debug("%s: aborting association:%p\n",
1805 sctp_primitive_ABORT(net
, asoc
, chunk
);
1811 /* Do we need to create the association? */
1813 pr_debug("%s: there is no association yet\n", __func__
);
1815 if (sinfo_flags
& (SCTP_EOF
| SCTP_ABORT
)) {
1820 /* Check for invalid stream against the stream counts,
1821 * either the default or the user specified stream counts.
1824 if (!sinit
|| !sinit
->sinit_num_ostreams
) {
1825 /* Check against the defaults. */
1826 if (sinfo
->sinfo_stream
>=
1827 sp
->initmsg
.sinit_num_ostreams
) {
1832 /* Check against the requested. */
1833 if (sinfo
->sinfo_stream
>=
1834 sinit
->sinit_num_ostreams
) {
1842 * API 3.1.2 bind() - UDP Style Syntax
1843 * If a bind() or sctp_bindx() is not called prior to a
1844 * sendmsg() call that initiates a new association, the
1845 * system picks an ephemeral port and will choose an address
1846 * set equivalent to binding with a wildcard address.
1848 if (!ep
->base
.bind_addr
.port
) {
1849 if (sctp_autobind(sk
)) {
1855 * If an unprivileged user inherits a one-to-many
1856 * style socket with open associations on a privileged
1857 * port, it MAY be permitted to accept new associations,
1858 * but it SHOULD NOT be permitted to open new
1861 if (ep
->base
.bind_addr
.port
< inet_prot_sock(net
) &&
1862 !ns_capable(net
->user_ns
, CAP_NET_BIND_SERVICE
)) {
1868 scope
= sctp_scope(&to
);
1869 new_asoc
= sctp_association_new(ep
, sk
, scope
, GFP_KERNEL
);
1875 err
= sctp_assoc_set_bind_addr_from_ep(asoc
, scope
, GFP_KERNEL
);
1881 /* If the SCTP_INIT ancillary data is specified, set all
1882 * the association init values accordingly.
1885 if (sinit
->sinit_num_ostreams
) {
1886 __u16 outcnt
= sinit
->sinit_num_ostreams
;
1888 asoc
->c
.sinit_num_ostreams
= outcnt
;
1889 /* outcnt has been changed, so re-init stream */
1890 err
= sctp_stream_init(&asoc
->stream
, outcnt
, 0,
1895 if (sinit
->sinit_max_instreams
) {
1896 asoc
->c
.sinit_max_instreams
=
1897 sinit
->sinit_max_instreams
;
1899 if (sinit
->sinit_max_attempts
) {
1900 asoc
->max_init_attempts
1901 = sinit
->sinit_max_attempts
;
1903 if (sinit
->sinit_max_init_timeo
) {
1904 asoc
->max_init_timeo
=
1905 msecs_to_jiffies(sinit
->sinit_max_init_timeo
);
1909 /* Prime the peer's transport structures. */
1910 transport
= sctp_assoc_add_peer(asoc
, &to
, GFP_KERNEL
, SCTP_UNKNOWN
);
1917 /* ASSERT: we have a valid association at this point. */
1918 pr_debug("%s: we have a valid association\n", __func__
);
1921 /* If the user didn't specify SNDINFO/SNDRCVINFO, make up
1922 * one with some defaults.
1924 memset(&default_sinfo
, 0, sizeof(default_sinfo
));
1925 default_sinfo
.sinfo_stream
= asoc
->default_stream
;
1926 default_sinfo
.sinfo_flags
= asoc
->default_flags
;
1927 default_sinfo
.sinfo_ppid
= asoc
->default_ppid
;
1928 default_sinfo
.sinfo_context
= asoc
->default_context
;
1929 default_sinfo
.sinfo_timetolive
= asoc
->default_timetolive
;
1930 default_sinfo
.sinfo_assoc_id
= sctp_assoc2id(asoc
);
1932 sinfo
= &default_sinfo
;
1933 } else if (fill_sinfo_ttl
) {
1934 /* In case SNDINFO was specified, we still need to fill
1935 * it with a default ttl from the assoc here.
1937 sinfo
->sinfo_timetolive
= asoc
->default_timetolive
;
1940 /* API 7.1.7, the sndbuf size per association bounds the
1941 * maximum size of data that can be sent in a single send call.
1943 if (msg_len
> sk
->sk_sndbuf
) {
1948 if (asoc
->pmtu_pending
)
1949 sctp_assoc_pending_pmtu(asoc
);
1951 /* If fragmentation is disabled and the message length exceeds the
1952 * association fragmentation point, return EMSGSIZE. The I-D
1953 * does not specify what this error is, but this looks like
1956 if (sctp_sk(sk
)->disable_fragments
&& (msg_len
> asoc
->frag_point
)) {
1961 /* Check for invalid stream. */
1962 if (sinfo
->sinfo_stream
>= asoc
->stream
.outcnt
) {
1967 if (sctp_wspace(asoc
) < msg_len
)
1968 sctp_prsctp_prune(asoc
, sinfo
, msg_len
- sctp_wspace(asoc
));
1970 timeo
= sock_sndtimeo(sk
, msg
->msg_flags
& MSG_DONTWAIT
);
1971 if (!sctp_wspace(asoc
)) {
1972 /* sk can be changed by peel off when waiting for buf. */
1973 err
= sctp_wait_for_sndbuf(asoc
, &timeo
, msg_len
);
1975 if (err
== -ESRCH
) {
1976 /* asoc is already dead. */
1984 /* If an address is passed with the sendto/sendmsg call, it is used
1985 * to override the primary destination address in the TCP model, or
1986 * when SCTP_ADDR_OVER flag is set in the UDP model.
1988 if ((sctp_style(sk
, TCP
) && msg_name
) ||
1989 (sinfo_flags
& SCTP_ADDR_OVER
)) {
1990 chunk_tp
= sctp_assoc_lookup_paddr(asoc
, &to
);
1998 /* Auto-connect, if we aren't connected already. */
1999 if (sctp_state(asoc
, CLOSED
)) {
2000 err
= sctp_primitive_ASSOCIATE(net
, asoc
, NULL
);
2004 wait_connect
= true;
2005 pr_debug("%s: we associated primitively\n", __func__
);
2008 /* Break the message into multiple chunks of maximum size. */
2009 datamsg
= sctp_datamsg_from_user(asoc
, sinfo
, &msg
->msg_iter
);
2010 if (IS_ERR(datamsg
)) {
2011 err
= PTR_ERR(datamsg
);
2014 asoc
->force_delay
= !!(msg
->msg_flags
& MSG_MORE
);
2016 /* Now send the (possibly) fragmented message. */
2017 list_for_each_entry(chunk
, &datamsg
->chunks
, frag_list
) {
2018 sctp_chunk_hold(chunk
);
2020 /* Do accounting for the write space. */
2021 sctp_set_owner_w(chunk
);
2023 chunk
->transport
= chunk_tp
;
2026 /* Send it to the lower layers. Note: all chunks
2027 * must either fail or succeed. The lower layer
2028 * works that way today. Keep it that way or this
2031 err
= sctp_primitive_SEND(net
, asoc
, datamsg
);
2032 /* Did the lower layer accept the chunk? */
2034 sctp_datamsg_free(datamsg
);
2038 pr_debug("%s: we sent primitively\n", __func__
);
2040 sctp_datamsg_put(datamsg
);
2043 if (unlikely(wait_connect
)) {
2044 timeo
= sock_sndtimeo(sk
, msg_flags
& MSG_DONTWAIT
);
2045 sctp_wait_for_connect(asoc
, &timeo
);
2048 /* If we are already past ASSOCIATE, the lower
2049 * layers are responsible for association cleanup.
2055 sctp_association_free(asoc
);
2060 return sctp_error(sk
, msg_flags
, err
);
2067 err
= sock_error(sk
);
2077 /* This is an extended version of skb_pull() that removes the data from the
2078 * start of a skb even when data is spread across the list of skb's in the
2079 * frag_list. len specifies the total amount of data that needs to be removed.
2080 * when 'len' bytes could be removed from the skb, it returns 0.
2081 * If 'len' exceeds the total skb length, it returns the no. of bytes that
2082 * could not be removed.
2084 static int sctp_skb_pull(struct sk_buff
*skb
, int len
)
2086 struct sk_buff
*list
;
2087 int skb_len
= skb_headlen(skb
);
2090 if (len
<= skb_len
) {
2091 __skb_pull(skb
, len
);
2095 __skb_pull(skb
, skb_len
);
2097 skb_walk_frags(skb
, list
) {
2098 rlen
= sctp_skb_pull(list
, len
);
2099 skb
->len
-= (len
-rlen
);
2100 skb
->data_len
-= (len
-rlen
);
2111 /* API 3.1.3 recvmsg() - UDP Style Syntax
2113 * ssize_t recvmsg(int socket, struct msghdr *message,
2116 * socket - the socket descriptor of the endpoint.
2117 * message - pointer to the msghdr structure which contains a single
2118 * user message and possibly some ancillary data.
2120 * See Section 5 for complete description of the data
2123 * flags - flags sent or received with the user message, see Section
2124 * 5 for complete description of the flags.
2126 static int sctp_recvmsg(struct sock
*sk
, struct msghdr
*msg
, size_t len
,
2127 int noblock
, int flags
, int *addr_len
)
2129 struct sctp_ulpevent
*event
= NULL
;
2130 struct sctp_sock
*sp
= sctp_sk(sk
);
2131 struct sk_buff
*skb
, *head_skb
;
2136 pr_debug("%s: sk:%p, msghdr:%p, len:%zd, noblock:%d, flags:0x%x, "
2137 "addr_len:%p)\n", __func__
, sk
, msg
, len
, noblock
, flags
,
2142 if (sctp_style(sk
, TCP
) && !sctp_sstate(sk
, ESTABLISHED
) &&
2143 !sctp_sstate(sk
, CLOSING
) && !sctp_sstate(sk
, CLOSED
)) {
2148 skb
= sctp_skb_recv_datagram(sk
, flags
, noblock
, &err
);
2152 /* Get the total length of the skb including any skb's in the
2161 err
= skb_copy_datagram_msg(skb
, 0, msg
, copied
);
2163 event
= sctp_skb2event(skb
);
2168 if (event
->chunk
&& event
->chunk
->head_skb
)
2169 head_skb
= event
->chunk
->head_skb
;
2172 sock_recv_ts_and_drops(msg
, sk
, head_skb
);
2173 if (sctp_ulpevent_is_notification(event
)) {
2174 msg
->msg_flags
|= MSG_NOTIFICATION
;
2175 sp
->pf
->event_msgname(event
, msg
->msg_name
, addr_len
);
2177 sp
->pf
->skb_msgname(head_skb
, msg
->msg_name
, addr_len
);
2180 /* Check if we allow SCTP_NXTINFO. */
2181 if (sp
->recvnxtinfo
)
2182 sctp_ulpevent_read_nxtinfo(event
, msg
, sk
);
2183 /* Check if we allow SCTP_RCVINFO. */
2184 if (sp
->recvrcvinfo
)
2185 sctp_ulpevent_read_rcvinfo(event
, msg
);
2186 /* Check if we allow SCTP_SNDRCVINFO. */
2187 if (sp
->subscribe
.sctp_data_io_event
)
2188 sctp_ulpevent_read_sndrcvinfo(event
, msg
);
2192 /* If skb's length exceeds the user's buffer, update the skb and
2193 * push it back to the receive_queue so that the next call to
2194 * recvmsg() will return the remaining data. Don't set MSG_EOR.
2196 if (skb_len
> copied
) {
2197 msg
->msg_flags
&= ~MSG_EOR
;
2198 if (flags
& MSG_PEEK
)
2200 sctp_skb_pull(skb
, copied
);
2201 skb_queue_head(&sk
->sk_receive_queue
, skb
);
2203 /* When only partial message is copied to the user, increase
2204 * rwnd by that amount. If all the data in the skb is read,
2205 * rwnd is updated when the event is freed.
2207 if (!sctp_ulpevent_is_notification(event
))
2208 sctp_assoc_rwnd_increase(event
->asoc
, copied
);
2210 } else if ((event
->msg_flags
& MSG_NOTIFICATION
) ||
2211 (event
->msg_flags
& MSG_EOR
))
2212 msg
->msg_flags
|= MSG_EOR
;
2214 msg
->msg_flags
&= ~MSG_EOR
;
2217 if (flags
& MSG_PEEK
) {
2218 /* Release the skb reference acquired after peeking the skb in
2219 * sctp_skb_recv_datagram().
2223 /* Free the event which includes releasing the reference to
2224 * the owner of the skb, freeing the skb and updating the
2227 sctp_ulpevent_free(event
);
2234 /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS)
2236 * This option is a on/off flag. If enabled no SCTP message
2237 * fragmentation will be performed. Instead if a message being sent
2238 * exceeds the current PMTU size, the message will NOT be sent and
2239 * instead a error will be indicated to the user.
2241 static int sctp_setsockopt_disable_fragments(struct sock
*sk
,
2242 char __user
*optval
,
2243 unsigned int optlen
)
2247 if (optlen
< sizeof(int))
2250 if (get_user(val
, (int __user
*)optval
))
2253 sctp_sk(sk
)->disable_fragments
= (val
== 0) ? 0 : 1;
2258 static int sctp_setsockopt_events(struct sock
*sk
, char __user
*optval
,
2259 unsigned int optlen
)
2261 struct sctp_association
*asoc
;
2262 struct sctp_ulpevent
*event
;
2264 if (optlen
> sizeof(struct sctp_event_subscribe
))
2266 if (copy_from_user(&sctp_sk(sk
)->subscribe
, optval
, optlen
))
2269 /* At the time when a user app subscribes to SCTP_SENDER_DRY_EVENT,
2270 * if there is no data to be sent or retransmit, the stack will
2271 * immediately send up this notification.
2273 if (sctp_ulpevent_type_enabled(SCTP_SENDER_DRY_EVENT
,
2274 &sctp_sk(sk
)->subscribe
)) {
2275 asoc
= sctp_id2assoc(sk
, 0);
2277 if (asoc
&& sctp_outq_is_empty(&asoc
->outqueue
)) {
2278 event
= sctp_ulpevent_make_sender_dry_event(asoc
,
2283 sctp_ulpq_tail_event(&asoc
->ulpq
, event
);
2290 /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE)
2292 * This socket option is applicable to the UDP-style socket only. When
2293 * set it will cause associations that are idle for more than the
2294 * specified number of seconds to automatically close. An association
2295 * being idle is defined an association that has NOT sent or received
2296 * user data. The special value of '0' indicates that no automatic
2297 * close of any associations should be performed. The option expects an
2298 * integer defining the number of seconds of idle time before an
2299 * association is closed.
2301 static int sctp_setsockopt_autoclose(struct sock
*sk
, char __user
*optval
,
2302 unsigned int optlen
)
2304 struct sctp_sock
*sp
= sctp_sk(sk
);
2305 struct net
*net
= sock_net(sk
);
2307 /* Applicable to UDP-style socket only */
2308 if (sctp_style(sk
, TCP
))
2310 if (optlen
!= sizeof(int))
2312 if (copy_from_user(&sp
->autoclose
, optval
, optlen
))
2315 if (sp
->autoclose
> net
->sctp
.max_autoclose
)
2316 sp
->autoclose
= net
->sctp
.max_autoclose
;
2321 /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS)
2323 * Applications can enable or disable heartbeats for any peer address of
2324 * an association, modify an address's heartbeat interval, force a
2325 * heartbeat to be sent immediately, and adjust the address's maximum
2326 * number of retransmissions sent before an address is considered
2327 * unreachable. The following structure is used to access and modify an
2328 * address's parameters:
2330 * struct sctp_paddrparams {
2331 * sctp_assoc_t spp_assoc_id;
2332 * struct sockaddr_storage spp_address;
2333 * uint32_t spp_hbinterval;
2334 * uint16_t spp_pathmaxrxt;
2335 * uint32_t spp_pathmtu;
2336 * uint32_t spp_sackdelay;
2337 * uint32_t spp_flags;
2340 * spp_assoc_id - (one-to-many style socket) This is filled in the
2341 * application, and identifies the association for
2343 * spp_address - This specifies which address is of interest.
2344 * spp_hbinterval - This contains the value of the heartbeat interval,
2345 * in milliseconds. If a value of zero
2346 * is present in this field then no changes are to
2347 * be made to this parameter.
2348 * spp_pathmaxrxt - This contains the maximum number of
2349 * retransmissions before this address shall be
2350 * considered unreachable. If a value of zero
2351 * is present in this field then no changes are to
2352 * be made to this parameter.
2353 * spp_pathmtu - When Path MTU discovery is disabled the value
2354 * specified here will be the "fixed" path mtu.
2355 * Note that if the spp_address field is empty
2356 * then all associations on this address will
2357 * have this fixed path mtu set upon them.
2359 * spp_sackdelay - When delayed sack is enabled, this value specifies
2360 * the number of milliseconds that sacks will be delayed
2361 * for. This value will apply to all addresses of an
2362 * association if the spp_address field is empty. Note
2363 * also, that if delayed sack is enabled and this
2364 * value is set to 0, no change is made to the last
2365 * recorded delayed sack timer value.
2367 * spp_flags - These flags are used to control various features
2368 * on an association. The flag field may contain
2369 * zero or more of the following options.
2371 * SPP_HB_ENABLE - Enable heartbeats on the
2372 * specified address. Note that if the address
2373 * field is empty all addresses for the association
2374 * have heartbeats enabled upon them.
2376 * SPP_HB_DISABLE - Disable heartbeats on the
2377 * speicifed address. Note that if the address
2378 * field is empty all addresses for the association
2379 * will have their heartbeats disabled. Note also
2380 * that SPP_HB_ENABLE and SPP_HB_DISABLE are
2381 * mutually exclusive, only one of these two should
2382 * be specified. Enabling both fields will have
2383 * undetermined results.
2385 * SPP_HB_DEMAND - Request a user initiated heartbeat
2386 * to be made immediately.
2388 * SPP_HB_TIME_IS_ZERO - Specify's that the time for
2389 * heartbeat delayis to be set to the value of 0
2392 * SPP_PMTUD_ENABLE - This field will enable PMTU
2393 * discovery upon the specified address. Note that
2394 * if the address feild is empty then all addresses
2395 * on the association are effected.
2397 * SPP_PMTUD_DISABLE - This field will disable PMTU
2398 * discovery upon the specified address. Note that
2399 * if the address feild is empty then all addresses
2400 * on the association are effected. Not also that
2401 * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually
2402 * exclusive. Enabling both will have undetermined
2405 * SPP_SACKDELAY_ENABLE - Setting this flag turns
2406 * on delayed sack. The time specified in spp_sackdelay
2407 * is used to specify the sack delay for this address. Note
2408 * that if spp_address is empty then all addresses will
2409 * enable delayed sack and take on the sack delay
2410 * value specified in spp_sackdelay.
2411 * SPP_SACKDELAY_DISABLE - Setting this flag turns
2412 * off delayed sack. If the spp_address field is blank then
2413 * delayed sack is disabled for the entire association. Note
2414 * also that this field is mutually exclusive to
2415 * SPP_SACKDELAY_ENABLE, setting both will have undefined
2418 static int sctp_apply_peer_addr_params(struct sctp_paddrparams
*params
,
2419 struct sctp_transport
*trans
,
2420 struct sctp_association
*asoc
,
2421 struct sctp_sock
*sp
,
2424 int sackdelay_change
)
2428 if (params
->spp_flags
& SPP_HB_DEMAND
&& trans
) {
2429 struct net
*net
= sock_net(trans
->asoc
->base
.sk
);
2431 error
= sctp_primitive_REQUESTHEARTBEAT(net
, trans
->asoc
, trans
);
2436 /* Note that unless the spp_flag is set to SPP_HB_ENABLE the value of
2437 * this field is ignored. Note also that a value of zero indicates
2438 * the current setting should be left unchanged.
2440 if (params
->spp_flags
& SPP_HB_ENABLE
) {
2442 /* Re-zero the interval if the SPP_HB_TIME_IS_ZERO is
2443 * set. This lets us use 0 value when this flag
2446 if (params
->spp_flags
& SPP_HB_TIME_IS_ZERO
)
2447 params
->spp_hbinterval
= 0;
2449 if (params
->spp_hbinterval
||
2450 (params
->spp_flags
& SPP_HB_TIME_IS_ZERO
)) {
2453 msecs_to_jiffies(params
->spp_hbinterval
);
2456 msecs_to_jiffies(params
->spp_hbinterval
);
2458 sp
->hbinterval
= params
->spp_hbinterval
;
2465 trans
->param_flags
=
2466 (trans
->param_flags
& ~SPP_HB
) | hb_change
;
2469 (asoc
->param_flags
& ~SPP_HB
) | hb_change
;
2472 (sp
->param_flags
& ~SPP_HB
) | hb_change
;
2476 /* When Path MTU discovery is disabled the value specified here will
2477 * be the "fixed" path mtu (i.e. the value of the spp_flags field must
2478 * include the flag SPP_PMTUD_DISABLE for this field to have any
2481 if ((params
->spp_flags
& SPP_PMTUD_DISABLE
) && params
->spp_pathmtu
) {
2483 trans
->pathmtu
= params
->spp_pathmtu
;
2484 sctp_assoc_sync_pmtu(asoc
);
2486 asoc
->pathmtu
= params
->spp_pathmtu
;
2488 sp
->pathmtu
= params
->spp_pathmtu
;
2494 int update
= (trans
->param_flags
& SPP_PMTUD_DISABLE
) &&
2495 (params
->spp_flags
& SPP_PMTUD_ENABLE
);
2496 trans
->param_flags
=
2497 (trans
->param_flags
& ~SPP_PMTUD
) | pmtud_change
;
2499 sctp_transport_pmtu(trans
, sctp_opt2sk(sp
));
2500 sctp_assoc_sync_pmtu(asoc
);
2504 (asoc
->param_flags
& ~SPP_PMTUD
) | pmtud_change
;
2507 (sp
->param_flags
& ~SPP_PMTUD
) | pmtud_change
;
2511 /* Note that unless the spp_flag is set to SPP_SACKDELAY_ENABLE the
2512 * value of this field is ignored. Note also that a value of zero
2513 * indicates the current setting should be left unchanged.
2515 if ((params
->spp_flags
& SPP_SACKDELAY_ENABLE
) && params
->spp_sackdelay
) {
2518 msecs_to_jiffies(params
->spp_sackdelay
);
2521 msecs_to_jiffies(params
->spp_sackdelay
);
2523 sp
->sackdelay
= params
->spp_sackdelay
;
2527 if (sackdelay_change
) {
2529 trans
->param_flags
=
2530 (trans
->param_flags
& ~SPP_SACKDELAY
) |
2534 (asoc
->param_flags
& ~SPP_SACKDELAY
) |
2538 (sp
->param_flags
& ~SPP_SACKDELAY
) |
2543 /* Note that a value of zero indicates the current setting should be
2546 if (params
->spp_pathmaxrxt
) {
2548 trans
->pathmaxrxt
= params
->spp_pathmaxrxt
;
2550 asoc
->pathmaxrxt
= params
->spp_pathmaxrxt
;
2552 sp
->pathmaxrxt
= params
->spp_pathmaxrxt
;
2559 static int sctp_setsockopt_peer_addr_params(struct sock
*sk
,
2560 char __user
*optval
,
2561 unsigned int optlen
)
2563 struct sctp_paddrparams params
;
2564 struct sctp_transport
*trans
= NULL
;
2565 struct sctp_association
*asoc
= NULL
;
2566 struct sctp_sock
*sp
= sctp_sk(sk
);
2568 int hb_change
, pmtud_change
, sackdelay_change
;
2570 if (optlen
!= sizeof(struct sctp_paddrparams
))
2573 if (copy_from_user(¶ms
, optval
, optlen
))
2576 /* Validate flags and value parameters. */
2577 hb_change
= params
.spp_flags
& SPP_HB
;
2578 pmtud_change
= params
.spp_flags
& SPP_PMTUD
;
2579 sackdelay_change
= params
.spp_flags
& SPP_SACKDELAY
;
2581 if (hb_change
== SPP_HB
||
2582 pmtud_change
== SPP_PMTUD
||
2583 sackdelay_change
== SPP_SACKDELAY
||
2584 params
.spp_sackdelay
> 500 ||
2585 (params
.spp_pathmtu
&&
2586 params
.spp_pathmtu
< SCTP_DEFAULT_MINSEGMENT
))
2589 /* If an address other than INADDR_ANY is specified, and
2590 * no transport is found, then the request is invalid.
2592 if (!sctp_is_any(sk
, (union sctp_addr
*)¶ms
.spp_address
)) {
2593 trans
= sctp_addr_id2transport(sk
, ¶ms
.spp_address
,
2594 params
.spp_assoc_id
);
2599 /* Get association, if assoc_id != 0 and the socket is a one
2600 * to many style socket, and an association was not found, then
2601 * the id was invalid.
2603 asoc
= sctp_id2assoc(sk
, params
.spp_assoc_id
);
2604 if (!asoc
&& params
.spp_assoc_id
&& sctp_style(sk
, UDP
))
2607 /* Heartbeat demand can only be sent on a transport or
2608 * association, but not a socket.
2610 if (params
.spp_flags
& SPP_HB_DEMAND
&& !trans
&& !asoc
)
2613 /* Process parameters. */
2614 error
= sctp_apply_peer_addr_params(¶ms
, trans
, asoc
, sp
,
2615 hb_change
, pmtud_change
,
2621 /* If changes are for association, also apply parameters to each
2624 if (!trans
&& asoc
) {
2625 list_for_each_entry(trans
, &asoc
->peer
.transport_addr_list
,
2627 sctp_apply_peer_addr_params(¶ms
, trans
, asoc
, sp
,
2628 hb_change
, pmtud_change
,
2636 static inline __u32
sctp_spp_sackdelay_enable(__u32 param_flags
)
2638 return (param_flags
& ~SPP_SACKDELAY
) | SPP_SACKDELAY_ENABLE
;
2641 static inline __u32
sctp_spp_sackdelay_disable(__u32 param_flags
)
2643 return (param_flags
& ~SPP_SACKDELAY
) | SPP_SACKDELAY_DISABLE
;
2647 * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK)
2649 * This option will effect the way delayed acks are performed. This
2650 * option allows you to get or set the delayed ack time, in
2651 * milliseconds. It also allows changing the delayed ack frequency.
2652 * Changing the frequency to 1 disables the delayed sack algorithm. If
2653 * the assoc_id is 0, then this sets or gets the endpoints default
2654 * values. If the assoc_id field is non-zero, then the set or get
2655 * effects the specified association for the one to many model (the
2656 * assoc_id field is ignored by the one to one model). Note that if
2657 * sack_delay or sack_freq are 0 when setting this option, then the
2658 * current values will remain unchanged.
2660 * struct sctp_sack_info {
2661 * sctp_assoc_t sack_assoc_id;
2662 * uint32_t sack_delay;
2663 * uint32_t sack_freq;
2666 * sack_assoc_id - This parameter, indicates which association the user
2667 * is performing an action upon. Note that if this field's value is
2668 * zero then the endpoints default value is changed (effecting future
2669 * associations only).
2671 * sack_delay - This parameter contains the number of milliseconds that
2672 * the user is requesting the delayed ACK timer be set to. Note that
2673 * this value is defined in the standard to be between 200 and 500
2676 * sack_freq - This parameter contains the number of packets that must
2677 * be received before a sack is sent without waiting for the delay
2678 * timer to expire. The default value for this is 2, setting this
2679 * value to 1 will disable the delayed sack algorithm.
2682 static int sctp_setsockopt_delayed_ack(struct sock
*sk
,
2683 char __user
*optval
, unsigned int optlen
)
2685 struct sctp_sack_info params
;
2686 struct sctp_transport
*trans
= NULL
;
2687 struct sctp_association
*asoc
= NULL
;
2688 struct sctp_sock
*sp
= sctp_sk(sk
);
2690 if (optlen
== sizeof(struct sctp_sack_info
)) {
2691 if (copy_from_user(¶ms
, optval
, optlen
))
2694 if (params
.sack_delay
== 0 && params
.sack_freq
== 0)
2696 } else if (optlen
== sizeof(struct sctp_assoc_value
)) {
2697 pr_warn_ratelimited(DEPRECATED
2699 "Use of struct sctp_assoc_value in delayed_ack socket option.\n"
2700 "Use struct sctp_sack_info instead\n",
2701 current
->comm
, task_pid_nr(current
));
2702 if (copy_from_user(¶ms
, optval
, optlen
))
2705 if (params
.sack_delay
== 0)
2706 params
.sack_freq
= 1;
2708 params
.sack_freq
= 0;
2712 /* Validate value parameter. */
2713 if (params
.sack_delay
> 500)
2716 /* Get association, if sack_assoc_id != 0 and the socket is a one
2717 * to many style socket, and an association was not found, then
2718 * the id was invalid.
2720 asoc
= sctp_id2assoc(sk
, params
.sack_assoc_id
);
2721 if (!asoc
&& params
.sack_assoc_id
&& sctp_style(sk
, UDP
))
2724 if (params
.sack_delay
) {
2727 msecs_to_jiffies(params
.sack_delay
);
2729 sctp_spp_sackdelay_enable(asoc
->param_flags
);
2731 sp
->sackdelay
= params
.sack_delay
;
2733 sctp_spp_sackdelay_enable(sp
->param_flags
);
2737 if (params
.sack_freq
== 1) {
2740 sctp_spp_sackdelay_disable(asoc
->param_flags
);
2743 sctp_spp_sackdelay_disable(sp
->param_flags
);
2745 } else if (params
.sack_freq
> 1) {
2747 asoc
->sackfreq
= params
.sack_freq
;
2749 sctp_spp_sackdelay_enable(asoc
->param_flags
);
2751 sp
->sackfreq
= params
.sack_freq
;
2753 sctp_spp_sackdelay_enable(sp
->param_flags
);
2757 /* If change is for association, also apply to each transport. */
2759 list_for_each_entry(trans
, &asoc
->peer
.transport_addr_list
,
2761 if (params
.sack_delay
) {
2763 msecs_to_jiffies(params
.sack_delay
);
2764 trans
->param_flags
=
2765 sctp_spp_sackdelay_enable(trans
->param_flags
);
2767 if (params
.sack_freq
== 1) {
2768 trans
->param_flags
=
2769 sctp_spp_sackdelay_disable(trans
->param_flags
);
2770 } else if (params
.sack_freq
> 1) {
2771 trans
->sackfreq
= params
.sack_freq
;
2772 trans
->param_flags
=
2773 sctp_spp_sackdelay_enable(trans
->param_flags
);
2781 /* 7.1.3 Initialization Parameters (SCTP_INITMSG)
2783 * Applications can specify protocol parameters for the default association
2784 * initialization. The option name argument to setsockopt() and getsockopt()
2787 * Setting initialization parameters is effective only on an unconnected
2788 * socket (for UDP-style sockets only future associations are effected
2789 * by the change). With TCP-style sockets, this option is inherited by
2790 * sockets derived from a listener socket.
2792 static int sctp_setsockopt_initmsg(struct sock
*sk
, char __user
*optval
, unsigned int optlen
)
2794 struct sctp_initmsg sinit
;
2795 struct sctp_sock
*sp
= sctp_sk(sk
);
2797 if (optlen
!= sizeof(struct sctp_initmsg
))
2799 if (copy_from_user(&sinit
, optval
, optlen
))
2802 if (sinit
.sinit_num_ostreams
)
2803 sp
->initmsg
.sinit_num_ostreams
= sinit
.sinit_num_ostreams
;
2804 if (sinit
.sinit_max_instreams
)
2805 sp
->initmsg
.sinit_max_instreams
= sinit
.sinit_max_instreams
;
2806 if (sinit
.sinit_max_attempts
)
2807 sp
->initmsg
.sinit_max_attempts
= sinit
.sinit_max_attempts
;
2808 if (sinit
.sinit_max_init_timeo
)
2809 sp
->initmsg
.sinit_max_init_timeo
= sinit
.sinit_max_init_timeo
;
2815 * 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM)
2817 * Applications that wish to use the sendto() system call may wish to
2818 * specify a default set of parameters that would normally be supplied
2819 * through the inclusion of ancillary data. This socket option allows
2820 * such an application to set the default sctp_sndrcvinfo structure.
2821 * The application that wishes to use this socket option simply passes
2822 * in to this call the sctp_sndrcvinfo structure defined in Section
2823 * 5.2.2) The input parameters accepted by this call include
2824 * sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context,
2825 * sinfo_timetolive. The user must provide the sinfo_assoc_id field in
2826 * to this call if the caller is using the UDP model.
2828 static int sctp_setsockopt_default_send_param(struct sock
*sk
,
2829 char __user
*optval
,
2830 unsigned int optlen
)
2832 struct sctp_sock
*sp
= sctp_sk(sk
);
2833 struct sctp_association
*asoc
;
2834 struct sctp_sndrcvinfo info
;
2836 if (optlen
!= sizeof(info
))
2838 if (copy_from_user(&info
, optval
, optlen
))
2840 if (info
.sinfo_flags
&
2841 ~(SCTP_UNORDERED
| SCTP_ADDR_OVER
|
2842 SCTP_ABORT
| SCTP_EOF
))
2845 asoc
= sctp_id2assoc(sk
, info
.sinfo_assoc_id
);
2846 if (!asoc
&& info
.sinfo_assoc_id
&& sctp_style(sk
, UDP
))
2849 asoc
->default_stream
= info
.sinfo_stream
;
2850 asoc
->default_flags
= info
.sinfo_flags
;
2851 asoc
->default_ppid
= info
.sinfo_ppid
;
2852 asoc
->default_context
= info
.sinfo_context
;
2853 asoc
->default_timetolive
= info
.sinfo_timetolive
;
2855 sp
->default_stream
= info
.sinfo_stream
;
2856 sp
->default_flags
= info
.sinfo_flags
;
2857 sp
->default_ppid
= info
.sinfo_ppid
;
2858 sp
->default_context
= info
.sinfo_context
;
2859 sp
->default_timetolive
= info
.sinfo_timetolive
;
2865 /* RFC6458, Section 8.1.31. Set/get Default Send Parameters
2866 * (SCTP_DEFAULT_SNDINFO)
2868 static int sctp_setsockopt_default_sndinfo(struct sock
*sk
,
2869 char __user
*optval
,
2870 unsigned int optlen
)
2872 struct sctp_sock
*sp
= sctp_sk(sk
);
2873 struct sctp_association
*asoc
;
2874 struct sctp_sndinfo info
;
2876 if (optlen
!= sizeof(info
))
2878 if (copy_from_user(&info
, optval
, optlen
))
2880 if (info
.snd_flags
&
2881 ~(SCTP_UNORDERED
| SCTP_ADDR_OVER
|
2882 SCTP_ABORT
| SCTP_EOF
))
2885 asoc
= sctp_id2assoc(sk
, info
.snd_assoc_id
);
2886 if (!asoc
&& info
.snd_assoc_id
&& sctp_style(sk
, UDP
))
2889 asoc
->default_stream
= info
.snd_sid
;
2890 asoc
->default_flags
= info
.snd_flags
;
2891 asoc
->default_ppid
= info
.snd_ppid
;
2892 asoc
->default_context
= info
.snd_context
;
2894 sp
->default_stream
= info
.snd_sid
;
2895 sp
->default_flags
= info
.snd_flags
;
2896 sp
->default_ppid
= info
.snd_ppid
;
2897 sp
->default_context
= info
.snd_context
;
2903 /* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
2905 * Requests that the local SCTP stack use the enclosed peer address as
2906 * the association primary. The enclosed address must be one of the
2907 * association peer's addresses.
2909 static int sctp_setsockopt_primary_addr(struct sock
*sk
, char __user
*optval
,
2910 unsigned int optlen
)
2912 struct sctp_prim prim
;
2913 struct sctp_transport
*trans
;
2915 if (optlen
!= sizeof(struct sctp_prim
))
2918 if (copy_from_user(&prim
, optval
, sizeof(struct sctp_prim
)))
2921 trans
= sctp_addr_id2transport(sk
, &prim
.ssp_addr
, prim
.ssp_assoc_id
);
2925 sctp_assoc_set_primary(trans
->asoc
, trans
);
2931 * 7.1.5 SCTP_NODELAY
2933 * Turn on/off any Nagle-like algorithm. This means that packets are
2934 * generally sent as soon as possible and no unnecessary delays are
2935 * introduced, at the cost of more packets in the network. Expects an
2936 * integer boolean flag.
2938 static int sctp_setsockopt_nodelay(struct sock
*sk
, char __user
*optval
,
2939 unsigned int optlen
)
2943 if (optlen
< sizeof(int))
2945 if (get_user(val
, (int __user
*)optval
))
2948 sctp_sk(sk
)->nodelay
= (val
== 0) ? 0 : 1;
2954 * 7.1.1 SCTP_RTOINFO
2956 * The protocol parameters used to initialize and bound retransmission
2957 * timeout (RTO) are tunable. sctp_rtoinfo structure is used to access
2958 * and modify these parameters.
2959 * All parameters are time values, in milliseconds. A value of 0, when
2960 * modifying the parameters, indicates that the current value should not
2964 static int sctp_setsockopt_rtoinfo(struct sock
*sk
, char __user
*optval
, unsigned int optlen
)
2966 struct sctp_rtoinfo rtoinfo
;
2967 struct sctp_association
*asoc
;
2968 unsigned long rto_min
, rto_max
;
2969 struct sctp_sock
*sp
= sctp_sk(sk
);
2971 if (optlen
!= sizeof (struct sctp_rtoinfo
))
2974 if (copy_from_user(&rtoinfo
, optval
, optlen
))
2977 asoc
= sctp_id2assoc(sk
, rtoinfo
.srto_assoc_id
);
2979 /* Set the values to the specific association */
2980 if (!asoc
&& rtoinfo
.srto_assoc_id
&& sctp_style(sk
, UDP
))
2983 rto_max
= rtoinfo
.srto_max
;
2984 rto_min
= rtoinfo
.srto_min
;
2987 rto_max
= asoc
? msecs_to_jiffies(rto_max
) : rto_max
;
2989 rto_max
= asoc
? asoc
->rto_max
: sp
->rtoinfo
.srto_max
;
2992 rto_min
= asoc
? msecs_to_jiffies(rto_min
) : rto_min
;
2994 rto_min
= asoc
? asoc
->rto_min
: sp
->rtoinfo
.srto_min
;
2996 if (rto_min
> rto_max
)
3000 if (rtoinfo
.srto_initial
!= 0)
3002 msecs_to_jiffies(rtoinfo
.srto_initial
);
3003 asoc
->rto_max
= rto_max
;
3004 asoc
->rto_min
= rto_min
;
3006 /* If there is no association or the association-id = 0
3007 * set the values to the endpoint.
3009 if (rtoinfo
.srto_initial
!= 0)
3010 sp
->rtoinfo
.srto_initial
= rtoinfo
.srto_initial
;
3011 sp
->rtoinfo
.srto_max
= rto_max
;
3012 sp
->rtoinfo
.srto_min
= rto_min
;
3020 * 7.1.2 SCTP_ASSOCINFO
3022 * This option is used to tune the maximum retransmission attempts
3023 * of the association.
3024 * Returns an error if the new association retransmission value is
3025 * greater than the sum of the retransmission value of the peer.
3026 * See [SCTP] for more information.
3029 static int sctp_setsockopt_associnfo(struct sock
*sk
, char __user
*optval
, unsigned int optlen
)
3032 struct sctp_assocparams assocparams
;
3033 struct sctp_association
*asoc
;
3035 if (optlen
!= sizeof(struct sctp_assocparams
))
3037 if (copy_from_user(&assocparams
, optval
, optlen
))
3040 asoc
= sctp_id2assoc(sk
, assocparams
.sasoc_assoc_id
);
3042 if (!asoc
&& assocparams
.sasoc_assoc_id
&& sctp_style(sk
, UDP
))
3045 /* Set the values to the specific association */
3047 if (assocparams
.sasoc_asocmaxrxt
!= 0) {
3050 struct sctp_transport
*peer_addr
;
3052 list_for_each_entry(peer_addr
, &asoc
->peer
.transport_addr_list
,
3054 path_sum
+= peer_addr
->pathmaxrxt
;
3058 /* Only validate asocmaxrxt if we have more than
3059 * one path/transport. We do this because path
3060 * retransmissions are only counted when we have more
3064 assocparams
.sasoc_asocmaxrxt
> path_sum
)
3067 asoc
->max_retrans
= assocparams
.sasoc_asocmaxrxt
;
3070 if (assocparams
.sasoc_cookie_life
!= 0)
3071 asoc
->cookie_life
= ms_to_ktime(assocparams
.sasoc_cookie_life
);
3073 /* Set the values to the endpoint */
3074 struct sctp_sock
*sp
= sctp_sk(sk
);
3076 if (assocparams
.sasoc_asocmaxrxt
!= 0)
3077 sp
->assocparams
.sasoc_asocmaxrxt
=
3078 assocparams
.sasoc_asocmaxrxt
;
3079 if (assocparams
.sasoc_cookie_life
!= 0)
3080 sp
->assocparams
.sasoc_cookie_life
=
3081 assocparams
.sasoc_cookie_life
;
3087 * 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR)
3089 * This socket option is a boolean flag which turns on or off mapped V4
3090 * addresses. If this option is turned on and the socket is type
3091 * PF_INET6, then IPv4 addresses will be mapped to V6 representation.
3092 * If this option is turned off, then no mapping will be done of V4
3093 * addresses and a user will receive both PF_INET6 and PF_INET type
3094 * addresses on the socket.
3096 static int sctp_setsockopt_mappedv4(struct sock
*sk
, char __user
*optval
, unsigned int optlen
)
3099 struct sctp_sock
*sp
= sctp_sk(sk
);
3101 if (optlen
< sizeof(int))
3103 if (get_user(val
, (int __user
*)optval
))
3114 * 8.1.16. Get or Set the Maximum Fragmentation Size (SCTP_MAXSEG)
3115 * This option will get or set the maximum size to put in any outgoing
3116 * SCTP DATA chunk. If a message is larger than this size it will be
3117 * fragmented by SCTP into the specified size. Note that the underlying
3118 * SCTP implementation may fragment into smaller sized chunks when the
3119 * PMTU of the underlying association is smaller than the value set by
3120 * the user. The default value for this option is '0' which indicates
3121 * the user is NOT limiting fragmentation and only the PMTU will effect
3122 * SCTP's choice of DATA chunk size. Note also that values set larger
3123 * than the maximum size of an IP datagram will effectively let SCTP
3124 * control fragmentation (i.e. the same as setting this option to 0).
3126 * The following structure is used to access and modify this parameter:
3128 * struct sctp_assoc_value {
3129 * sctp_assoc_t assoc_id;
3130 * uint32_t assoc_value;
3133 * assoc_id: This parameter is ignored for one-to-one style sockets.
3134 * For one-to-many style sockets this parameter indicates which
3135 * association the user is performing an action upon. Note that if
3136 * this field's value is zero then the endpoints default value is
3137 * changed (effecting future associations only).
3138 * assoc_value: This parameter specifies the maximum size in bytes.
3140 static int sctp_setsockopt_maxseg(struct sock
*sk
, char __user
*optval
, unsigned int optlen
)
3142 struct sctp_sock
*sp
= sctp_sk(sk
);
3143 struct sctp_assoc_value params
;
3144 struct sctp_association
*asoc
;
3147 if (optlen
== sizeof(int)) {
3148 pr_warn_ratelimited(DEPRECATED
3150 "Use of int in maxseg socket option.\n"
3151 "Use struct sctp_assoc_value instead\n",
3152 current
->comm
, task_pid_nr(current
));
3153 if (copy_from_user(&val
, optval
, optlen
))
3155 params
.assoc_id
= 0;
3156 } else if (optlen
== sizeof(struct sctp_assoc_value
)) {
3157 if (copy_from_user(¶ms
, optval
, optlen
))
3159 val
= params
.assoc_value
;
3165 int min_len
, max_len
;
3167 min_len
= SCTP_DEFAULT_MINSEGMENT
- sp
->pf
->af
->net_header_len
;
3168 min_len
-= sizeof(struct sctphdr
) +
3169 sizeof(struct sctp_data_chunk
);
3171 max_len
= SCTP_MAX_CHUNK_LEN
- sizeof(struct sctp_data_chunk
);
3173 if (val
< min_len
|| val
> max_len
)
3177 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
3180 val
= asoc
->pathmtu
- sp
->pf
->af
->net_header_len
;
3181 val
-= sizeof(struct sctphdr
) +
3182 sizeof(struct sctp_data_chunk
);
3184 asoc
->user_frag
= val
;
3185 asoc
->frag_point
= sctp_frag_point(asoc
, asoc
->pathmtu
);
3187 if (params
.assoc_id
&& sctp_style(sk
, UDP
))
3189 sp
->user_frag
= val
;
3197 * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR)
3199 * Requests that the peer mark the enclosed address as the association
3200 * primary. The enclosed address must be one of the association's
3201 * locally bound addresses. The following structure is used to make a
3202 * set primary request:
3204 static int sctp_setsockopt_peer_primary_addr(struct sock
*sk
, char __user
*optval
,
3205 unsigned int optlen
)
3207 struct net
*net
= sock_net(sk
);
3208 struct sctp_sock
*sp
;
3209 struct sctp_association
*asoc
= NULL
;
3210 struct sctp_setpeerprim prim
;
3211 struct sctp_chunk
*chunk
;
3217 if (!net
->sctp
.addip_enable
)
3220 if (optlen
!= sizeof(struct sctp_setpeerprim
))
3223 if (copy_from_user(&prim
, optval
, optlen
))
3226 asoc
= sctp_id2assoc(sk
, prim
.sspp_assoc_id
);
3230 if (!asoc
->peer
.asconf_capable
)
3233 if (asoc
->peer
.addip_disabled_mask
& SCTP_PARAM_SET_PRIMARY
)
3236 if (!sctp_state(asoc
, ESTABLISHED
))
3239 af
= sctp_get_af_specific(prim
.sspp_addr
.ss_family
);
3243 if (!af
->addr_valid((union sctp_addr
*)&prim
.sspp_addr
, sp
, NULL
))
3244 return -EADDRNOTAVAIL
;
3246 if (!sctp_assoc_lookup_laddr(asoc
, (union sctp_addr
*)&prim
.sspp_addr
))
3247 return -EADDRNOTAVAIL
;
3249 /* Create an ASCONF chunk with SET_PRIMARY parameter */
3250 chunk
= sctp_make_asconf_set_prim(asoc
,
3251 (union sctp_addr
*)&prim
.sspp_addr
);
3255 err
= sctp_send_asconf(asoc
, chunk
);
3257 pr_debug("%s: we set peer primary addr primitively\n", __func__
);
3262 static int sctp_setsockopt_adaptation_layer(struct sock
*sk
, char __user
*optval
,
3263 unsigned int optlen
)
3265 struct sctp_setadaptation adaptation
;
3267 if (optlen
!= sizeof(struct sctp_setadaptation
))
3269 if (copy_from_user(&adaptation
, optval
, optlen
))
3272 sctp_sk(sk
)->adaptation_ind
= adaptation
.ssb_adaptation_ind
;
3278 * 7.1.29. Set or Get the default context (SCTP_CONTEXT)
3280 * The context field in the sctp_sndrcvinfo structure is normally only
3281 * used when a failed message is retrieved holding the value that was
3282 * sent down on the actual send call. This option allows the setting of
3283 * a default context on an association basis that will be received on
3284 * reading messages from the peer. This is especially helpful in the
3285 * one-2-many model for an application to keep some reference to an
3286 * internal state machine that is processing messages on the
3287 * association. Note that the setting of this value only effects
3288 * received messages from the peer and does not effect the value that is
3289 * saved with outbound messages.
3291 static int sctp_setsockopt_context(struct sock
*sk
, char __user
*optval
,
3292 unsigned int optlen
)
3294 struct sctp_assoc_value params
;
3295 struct sctp_sock
*sp
;
3296 struct sctp_association
*asoc
;
3298 if (optlen
!= sizeof(struct sctp_assoc_value
))
3300 if (copy_from_user(¶ms
, optval
, optlen
))
3305 if (params
.assoc_id
!= 0) {
3306 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
3309 asoc
->default_rcv_context
= params
.assoc_value
;
3311 sp
->default_rcv_context
= params
.assoc_value
;
3318 * 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE)
3320 * This options will at a minimum specify if the implementation is doing
3321 * fragmented interleave. Fragmented interleave, for a one to many
3322 * socket, is when subsequent calls to receive a message may return
3323 * parts of messages from different associations. Some implementations
3324 * may allow you to turn this value on or off. If so, when turned off,
3325 * no fragment interleave will occur (which will cause a head of line
3326 * blocking amongst multiple associations sharing the same one to many
3327 * socket). When this option is turned on, then each receive call may
3328 * come from a different association (thus the user must receive data
3329 * with the extended calls (e.g. sctp_recvmsg) to keep track of which
3330 * association each receive belongs to.
3332 * This option takes a boolean value. A non-zero value indicates that
3333 * fragmented interleave is on. A value of zero indicates that
3334 * fragmented interleave is off.
3336 * Note that it is important that an implementation that allows this
3337 * option to be turned on, have it off by default. Otherwise an unaware
3338 * application using the one to many model may become confused and act
3341 static int sctp_setsockopt_fragment_interleave(struct sock
*sk
,
3342 char __user
*optval
,
3343 unsigned int optlen
)
3347 if (optlen
!= sizeof(int))
3349 if (get_user(val
, (int __user
*)optval
))
3352 sctp_sk(sk
)->frag_interleave
= (val
== 0) ? 0 : 1;
3358 * 8.1.21. Set or Get the SCTP Partial Delivery Point
3359 * (SCTP_PARTIAL_DELIVERY_POINT)
3361 * This option will set or get the SCTP partial delivery point. This
3362 * point is the size of a message where the partial delivery API will be
3363 * invoked to help free up rwnd space for the peer. Setting this to a
3364 * lower value will cause partial deliveries to happen more often. The
3365 * calls argument is an integer that sets or gets the partial delivery
3366 * point. Note also that the call will fail if the user attempts to set
3367 * this value larger than the socket receive buffer size.
3369 * Note that any single message having a length smaller than or equal to
3370 * the SCTP partial delivery point will be delivered in one single read
3371 * call as long as the user provided buffer is large enough to hold the
3374 static int sctp_setsockopt_partial_delivery_point(struct sock
*sk
,
3375 char __user
*optval
,
3376 unsigned int optlen
)
3380 if (optlen
!= sizeof(u32
))
3382 if (get_user(val
, (int __user
*)optval
))
3385 /* Note: We double the receive buffer from what the user sets
3386 * it to be, also initial rwnd is based on rcvbuf/2.
3388 if (val
> (sk
->sk_rcvbuf
>> 1))
3391 sctp_sk(sk
)->pd_point
= val
;
3393 return 0; /* is this the right error code? */
3397 * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST)
3399 * This option will allow a user to change the maximum burst of packets
3400 * that can be emitted by this association. Note that the default value
3401 * is 4, and some implementations may restrict this setting so that it
3402 * can only be lowered.
3404 * NOTE: This text doesn't seem right. Do this on a socket basis with
3405 * future associations inheriting the socket value.
3407 static int sctp_setsockopt_maxburst(struct sock
*sk
,
3408 char __user
*optval
,
3409 unsigned int optlen
)
3411 struct sctp_assoc_value params
;
3412 struct sctp_sock
*sp
;
3413 struct sctp_association
*asoc
;
3417 if (optlen
== sizeof(int)) {
3418 pr_warn_ratelimited(DEPRECATED
3420 "Use of int in max_burst socket option deprecated.\n"
3421 "Use struct sctp_assoc_value instead\n",
3422 current
->comm
, task_pid_nr(current
));
3423 if (copy_from_user(&val
, optval
, optlen
))
3425 } else if (optlen
== sizeof(struct sctp_assoc_value
)) {
3426 if (copy_from_user(¶ms
, optval
, optlen
))
3428 val
= params
.assoc_value
;
3429 assoc_id
= params
.assoc_id
;
3435 if (assoc_id
!= 0) {
3436 asoc
= sctp_id2assoc(sk
, assoc_id
);
3439 asoc
->max_burst
= val
;
3441 sp
->max_burst
= val
;
3447 * 7.1.18. Add a chunk that must be authenticated (SCTP_AUTH_CHUNK)
3449 * This set option adds a chunk type that the user is requesting to be
3450 * received only in an authenticated way. Changes to the list of chunks
3451 * will only effect future associations on the socket.
3453 static int sctp_setsockopt_auth_chunk(struct sock
*sk
,
3454 char __user
*optval
,
3455 unsigned int optlen
)
3457 struct sctp_endpoint
*ep
= sctp_sk(sk
)->ep
;
3458 struct sctp_authchunk val
;
3460 if (!ep
->auth_enable
)
3463 if (optlen
!= sizeof(struct sctp_authchunk
))
3465 if (copy_from_user(&val
, optval
, optlen
))
3468 switch (val
.sauth_chunk
) {
3470 case SCTP_CID_INIT_ACK
:
3471 case SCTP_CID_SHUTDOWN_COMPLETE
:
3476 /* add this chunk id to the endpoint */
3477 return sctp_auth_ep_add_chunkid(ep
, val
.sauth_chunk
);
3481 * 7.1.19. Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT)
3483 * This option gets or sets the list of HMAC algorithms that the local
3484 * endpoint requires the peer to use.
3486 static int sctp_setsockopt_hmac_ident(struct sock
*sk
,
3487 char __user
*optval
,
3488 unsigned int optlen
)
3490 struct sctp_endpoint
*ep
= sctp_sk(sk
)->ep
;
3491 struct sctp_hmacalgo
*hmacs
;
3495 if (!ep
->auth_enable
)
3498 if (optlen
< sizeof(struct sctp_hmacalgo
))
3500 optlen
= min_t(unsigned int, optlen
, sizeof(struct sctp_hmacalgo
) +
3501 SCTP_AUTH_NUM_HMACS
* sizeof(u16
));
3503 hmacs
= memdup_user(optval
, optlen
);
3505 return PTR_ERR(hmacs
);
3507 idents
= hmacs
->shmac_num_idents
;
3508 if (idents
== 0 || idents
> SCTP_AUTH_NUM_HMACS
||
3509 (idents
* sizeof(u16
)) > (optlen
- sizeof(struct sctp_hmacalgo
))) {
3514 err
= sctp_auth_ep_set_hmacs(ep
, hmacs
);
3521 * 7.1.20. Set a shared key (SCTP_AUTH_KEY)
3523 * This option will set a shared secret key which is used to build an
3524 * association shared key.
3526 static int sctp_setsockopt_auth_key(struct sock
*sk
,
3527 char __user
*optval
,
3528 unsigned int optlen
)
3530 struct sctp_endpoint
*ep
= sctp_sk(sk
)->ep
;
3531 struct sctp_authkey
*authkey
;
3532 struct sctp_association
*asoc
;
3535 if (!ep
->auth_enable
)
3538 if (optlen
<= sizeof(struct sctp_authkey
))
3540 /* authkey->sca_keylength is u16, so optlen can't be bigger than
3543 optlen
= min_t(unsigned int, optlen
, USHRT_MAX
+
3544 sizeof(struct sctp_authkey
));
3546 authkey
= memdup_user(optval
, optlen
);
3547 if (IS_ERR(authkey
))
3548 return PTR_ERR(authkey
);
3550 if (authkey
->sca_keylength
> optlen
- sizeof(struct sctp_authkey
)) {
3555 asoc
= sctp_id2assoc(sk
, authkey
->sca_assoc_id
);
3556 if (!asoc
&& authkey
->sca_assoc_id
&& sctp_style(sk
, UDP
)) {
3561 ret
= sctp_auth_set_key(ep
, asoc
, authkey
);
3568 * 7.1.21. Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY)
3570 * This option will get or set the active shared key to be used to build
3571 * the association shared key.
3573 static int sctp_setsockopt_active_key(struct sock
*sk
,
3574 char __user
*optval
,
3575 unsigned int optlen
)
3577 struct sctp_endpoint
*ep
= sctp_sk(sk
)->ep
;
3578 struct sctp_authkeyid val
;
3579 struct sctp_association
*asoc
;
3581 if (!ep
->auth_enable
)
3584 if (optlen
!= sizeof(struct sctp_authkeyid
))
3586 if (copy_from_user(&val
, optval
, optlen
))
3589 asoc
= sctp_id2assoc(sk
, val
.scact_assoc_id
);
3590 if (!asoc
&& val
.scact_assoc_id
&& sctp_style(sk
, UDP
))
3593 return sctp_auth_set_active_key(ep
, asoc
, val
.scact_keynumber
);
3597 * 7.1.22. Delete a shared key (SCTP_AUTH_DELETE_KEY)
3599 * This set option will delete a shared secret key from use.
3601 static int sctp_setsockopt_del_key(struct sock
*sk
,
3602 char __user
*optval
,
3603 unsigned int optlen
)
3605 struct sctp_endpoint
*ep
= sctp_sk(sk
)->ep
;
3606 struct sctp_authkeyid val
;
3607 struct sctp_association
*asoc
;
3609 if (!ep
->auth_enable
)
3612 if (optlen
!= sizeof(struct sctp_authkeyid
))
3614 if (copy_from_user(&val
, optval
, optlen
))
3617 asoc
= sctp_id2assoc(sk
, val
.scact_assoc_id
);
3618 if (!asoc
&& val
.scact_assoc_id
&& sctp_style(sk
, UDP
))
3621 return sctp_auth_del_key_id(ep
, asoc
, val
.scact_keynumber
);
3626 * 8.1.23 SCTP_AUTO_ASCONF
3628 * This option will enable or disable the use of the automatic generation of
3629 * ASCONF chunks to add and delete addresses to an existing association. Note
3630 * that this option has two caveats namely: a) it only affects sockets that
3631 * are bound to all addresses available to the SCTP stack, and b) the system
3632 * administrator may have an overriding control that turns the ASCONF feature
3633 * off no matter what setting the socket option may have.
3634 * This option expects an integer boolean flag, where a non-zero value turns on
3635 * the option, and a zero value turns off the option.
3636 * Note. In this implementation, socket operation overrides default parameter
3637 * being set by sysctl as well as FreeBSD implementation
3639 static int sctp_setsockopt_auto_asconf(struct sock
*sk
, char __user
*optval
,
3640 unsigned int optlen
)
3643 struct sctp_sock
*sp
= sctp_sk(sk
);
3645 if (optlen
< sizeof(int))
3647 if (get_user(val
, (int __user
*)optval
))
3649 if (!sctp_is_ep_boundall(sk
) && val
)
3651 if ((val
&& sp
->do_auto_asconf
) || (!val
&& !sp
->do_auto_asconf
))
3654 spin_lock_bh(&sock_net(sk
)->sctp
.addr_wq_lock
);
3655 if (val
== 0 && sp
->do_auto_asconf
) {
3656 list_del(&sp
->auto_asconf_list
);
3657 sp
->do_auto_asconf
= 0;
3658 } else if (val
&& !sp
->do_auto_asconf
) {
3659 list_add_tail(&sp
->auto_asconf_list
,
3660 &sock_net(sk
)->sctp
.auto_asconf_splist
);
3661 sp
->do_auto_asconf
= 1;
3663 spin_unlock_bh(&sock_net(sk
)->sctp
.addr_wq_lock
);
3668 * SCTP_PEER_ADDR_THLDS
3670 * This option allows us to alter the partially failed threshold for one or all
3671 * transports in an association. See Section 6.1 of:
3672 * http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txt
3674 static int sctp_setsockopt_paddr_thresholds(struct sock
*sk
,
3675 char __user
*optval
,
3676 unsigned int optlen
)
3678 struct sctp_paddrthlds val
;
3679 struct sctp_transport
*trans
;
3680 struct sctp_association
*asoc
;
3682 if (optlen
< sizeof(struct sctp_paddrthlds
))
3684 if (copy_from_user(&val
, (struct sctp_paddrthlds __user
*)optval
,
3685 sizeof(struct sctp_paddrthlds
)))
3689 if (sctp_is_any(sk
, (const union sctp_addr
*)&val
.spt_address
)) {
3690 asoc
= sctp_id2assoc(sk
, val
.spt_assoc_id
);
3693 list_for_each_entry(trans
, &asoc
->peer
.transport_addr_list
,
3695 if (val
.spt_pathmaxrxt
)
3696 trans
->pathmaxrxt
= val
.spt_pathmaxrxt
;
3697 trans
->pf_retrans
= val
.spt_pathpfthld
;
3700 if (val
.spt_pathmaxrxt
)
3701 asoc
->pathmaxrxt
= val
.spt_pathmaxrxt
;
3702 asoc
->pf_retrans
= val
.spt_pathpfthld
;
3704 trans
= sctp_addr_id2transport(sk
, &val
.spt_address
,
3709 if (val
.spt_pathmaxrxt
)
3710 trans
->pathmaxrxt
= val
.spt_pathmaxrxt
;
3711 trans
->pf_retrans
= val
.spt_pathpfthld
;
3717 static int sctp_setsockopt_recvrcvinfo(struct sock
*sk
,
3718 char __user
*optval
,
3719 unsigned int optlen
)
3723 if (optlen
< sizeof(int))
3725 if (get_user(val
, (int __user
*) optval
))
3728 sctp_sk(sk
)->recvrcvinfo
= (val
== 0) ? 0 : 1;
3733 static int sctp_setsockopt_recvnxtinfo(struct sock
*sk
,
3734 char __user
*optval
,
3735 unsigned int optlen
)
3739 if (optlen
< sizeof(int))
3741 if (get_user(val
, (int __user
*) optval
))
3744 sctp_sk(sk
)->recvnxtinfo
= (val
== 0) ? 0 : 1;
3749 static int sctp_setsockopt_pr_supported(struct sock
*sk
,
3750 char __user
*optval
,
3751 unsigned int optlen
)
3753 struct sctp_assoc_value params
;
3754 struct sctp_association
*asoc
;
3755 int retval
= -EINVAL
;
3757 if (optlen
!= sizeof(params
))
3760 if (copy_from_user(¶ms
, optval
, optlen
)) {
3765 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
3767 asoc
->prsctp_enable
= !!params
.assoc_value
;
3768 } else if (!params
.assoc_id
) {
3769 struct sctp_sock
*sp
= sctp_sk(sk
);
3771 sp
->ep
->prsctp_enable
= !!params
.assoc_value
;
3782 static int sctp_setsockopt_default_prinfo(struct sock
*sk
,
3783 char __user
*optval
,
3784 unsigned int optlen
)
3786 struct sctp_default_prinfo info
;
3787 struct sctp_association
*asoc
;
3788 int retval
= -EINVAL
;
3790 if (optlen
!= sizeof(info
))
3793 if (copy_from_user(&info
, optval
, sizeof(info
))) {
3798 if (info
.pr_policy
& ~SCTP_PR_SCTP_MASK
)
3801 if (info
.pr_policy
== SCTP_PR_SCTP_NONE
)
3804 asoc
= sctp_id2assoc(sk
, info
.pr_assoc_id
);
3806 SCTP_PR_SET_POLICY(asoc
->default_flags
, info
.pr_policy
);
3807 asoc
->default_timetolive
= info
.pr_value
;
3808 } else if (!info
.pr_assoc_id
) {
3809 struct sctp_sock
*sp
= sctp_sk(sk
);
3811 SCTP_PR_SET_POLICY(sp
->default_flags
, info
.pr_policy
);
3812 sp
->default_timetolive
= info
.pr_value
;
3823 static int sctp_setsockopt_reconfig_supported(struct sock
*sk
,
3824 char __user
*optval
,
3825 unsigned int optlen
)
3827 struct sctp_assoc_value params
;
3828 struct sctp_association
*asoc
;
3829 int retval
= -EINVAL
;
3831 if (optlen
!= sizeof(params
))
3834 if (copy_from_user(¶ms
, optval
, optlen
)) {
3839 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
3841 asoc
->reconf_enable
= !!params
.assoc_value
;
3842 } else if (!params
.assoc_id
) {
3843 struct sctp_sock
*sp
= sctp_sk(sk
);
3845 sp
->ep
->reconf_enable
= !!params
.assoc_value
;
3856 static int sctp_setsockopt_enable_strreset(struct sock
*sk
,
3857 char __user
*optval
,
3858 unsigned int optlen
)
3860 struct sctp_assoc_value params
;
3861 struct sctp_association
*asoc
;
3862 int retval
= -EINVAL
;
3864 if (optlen
!= sizeof(params
))
3867 if (copy_from_user(¶ms
, optval
, optlen
)) {
3872 if (params
.assoc_value
& (~SCTP_ENABLE_STRRESET_MASK
))
3875 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
3877 asoc
->strreset_enable
= params
.assoc_value
;
3878 } else if (!params
.assoc_id
) {
3879 struct sctp_sock
*sp
= sctp_sk(sk
);
3881 sp
->ep
->strreset_enable
= params
.assoc_value
;
3892 static int sctp_setsockopt_reset_streams(struct sock
*sk
,
3893 char __user
*optval
,
3894 unsigned int optlen
)
3896 struct sctp_reset_streams
*params
;
3897 struct sctp_association
*asoc
;
3898 int retval
= -EINVAL
;
3900 if (optlen
< sizeof(*params
))
3902 /* srs_number_streams is u16, so optlen can't be bigger than this. */
3903 optlen
= min_t(unsigned int, optlen
, USHRT_MAX
+
3904 sizeof(__u16
) * sizeof(*params
));
3906 params
= memdup_user(optval
, optlen
);
3908 return PTR_ERR(params
);
3910 if (params
->srs_number_streams
* sizeof(__u16
) >
3911 optlen
- sizeof(*params
))
3914 asoc
= sctp_id2assoc(sk
, params
->srs_assoc_id
);
3918 retval
= sctp_send_reset_streams(asoc
, params
);
3925 static int sctp_setsockopt_reset_assoc(struct sock
*sk
,
3926 char __user
*optval
,
3927 unsigned int optlen
)
3929 struct sctp_association
*asoc
;
3930 sctp_assoc_t associd
;
3931 int retval
= -EINVAL
;
3933 if (optlen
!= sizeof(associd
))
3936 if (copy_from_user(&associd
, optval
, optlen
)) {
3941 asoc
= sctp_id2assoc(sk
, associd
);
3945 retval
= sctp_send_reset_assoc(asoc
);
3951 static int sctp_setsockopt_add_streams(struct sock
*sk
,
3952 char __user
*optval
,
3953 unsigned int optlen
)
3955 struct sctp_association
*asoc
;
3956 struct sctp_add_streams params
;
3957 int retval
= -EINVAL
;
3959 if (optlen
!= sizeof(params
))
3962 if (copy_from_user(¶ms
, optval
, optlen
)) {
3967 asoc
= sctp_id2assoc(sk
, params
.sas_assoc_id
);
3971 retval
= sctp_send_add_streams(asoc
, ¶ms
);
3977 /* API 6.2 setsockopt(), getsockopt()
3979 * Applications use setsockopt() and getsockopt() to set or retrieve
3980 * socket options. Socket options are used to change the default
3981 * behavior of sockets calls. They are described in Section 7.
3985 * ret = getsockopt(int sd, int level, int optname, void __user *optval,
3986 * int __user *optlen);
3987 * ret = setsockopt(int sd, int level, int optname, const void __user *optval,
3990 * sd - the socket descript.
3991 * level - set to IPPROTO_SCTP for all SCTP options.
3992 * optname - the option name.
3993 * optval - the buffer to store the value of the option.
3994 * optlen - the size of the buffer.
3996 static int sctp_setsockopt(struct sock
*sk
, int level
, int optname
,
3997 char __user
*optval
, unsigned int optlen
)
4001 pr_debug("%s: sk:%p, optname:%d\n", __func__
, sk
, optname
);
4003 /* I can hardly begin to describe how wrong this is. This is
4004 * so broken as to be worse than useless. The API draft
4005 * REALLY is NOT helpful here... I am not convinced that the
4006 * semantics of setsockopt() with a level OTHER THAN SOL_SCTP
4007 * are at all well-founded.
4009 if (level
!= SOL_SCTP
) {
4010 struct sctp_af
*af
= sctp_sk(sk
)->pf
->af
;
4011 retval
= af
->setsockopt(sk
, level
, optname
, optval
, optlen
);
4018 case SCTP_SOCKOPT_BINDX_ADD
:
4019 /* 'optlen' is the size of the addresses buffer. */
4020 retval
= sctp_setsockopt_bindx(sk
, (struct sockaddr __user
*)optval
,
4021 optlen
, SCTP_BINDX_ADD_ADDR
);
4024 case SCTP_SOCKOPT_BINDX_REM
:
4025 /* 'optlen' is the size of the addresses buffer. */
4026 retval
= sctp_setsockopt_bindx(sk
, (struct sockaddr __user
*)optval
,
4027 optlen
, SCTP_BINDX_REM_ADDR
);
4030 case SCTP_SOCKOPT_CONNECTX_OLD
:
4031 /* 'optlen' is the size of the addresses buffer. */
4032 retval
= sctp_setsockopt_connectx_old(sk
,
4033 (struct sockaddr __user
*)optval
,
4037 case SCTP_SOCKOPT_CONNECTX
:
4038 /* 'optlen' is the size of the addresses buffer. */
4039 retval
= sctp_setsockopt_connectx(sk
,
4040 (struct sockaddr __user
*)optval
,
4044 case SCTP_DISABLE_FRAGMENTS
:
4045 retval
= sctp_setsockopt_disable_fragments(sk
, optval
, optlen
);
4049 retval
= sctp_setsockopt_events(sk
, optval
, optlen
);
4052 case SCTP_AUTOCLOSE
:
4053 retval
= sctp_setsockopt_autoclose(sk
, optval
, optlen
);
4056 case SCTP_PEER_ADDR_PARAMS
:
4057 retval
= sctp_setsockopt_peer_addr_params(sk
, optval
, optlen
);
4060 case SCTP_DELAYED_SACK
:
4061 retval
= sctp_setsockopt_delayed_ack(sk
, optval
, optlen
);
4063 case SCTP_PARTIAL_DELIVERY_POINT
:
4064 retval
= sctp_setsockopt_partial_delivery_point(sk
, optval
, optlen
);
4068 retval
= sctp_setsockopt_initmsg(sk
, optval
, optlen
);
4070 case SCTP_DEFAULT_SEND_PARAM
:
4071 retval
= sctp_setsockopt_default_send_param(sk
, optval
,
4074 case SCTP_DEFAULT_SNDINFO
:
4075 retval
= sctp_setsockopt_default_sndinfo(sk
, optval
, optlen
);
4077 case SCTP_PRIMARY_ADDR
:
4078 retval
= sctp_setsockopt_primary_addr(sk
, optval
, optlen
);
4080 case SCTP_SET_PEER_PRIMARY_ADDR
:
4081 retval
= sctp_setsockopt_peer_primary_addr(sk
, optval
, optlen
);
4084 retval
= sctp_setsockopt_nodelay(sk
, optval
, optlen
);
4087 retval
= sctp_setsockopt_rtoinfo(sk
, optval
, optlen
);
4089 case SCTP_ASSOCINFO
:
4090 retval
= sctp_setsockopt_associnfo(sk
, optval
, optlen
);
4092 case SCTP_I_WANT_MAPPED_V4_ADDR
:
4093 retval
= sctp_setsockopt_mappedv4(sk
, optval
, optlen
);
4096 retval
= sctp_setsockopt_maxseg(sk
, optval
, optlen
);
4098 case SCTP_ADAPTATION_LAYER
:
4099 retval
= sctp_setsockopt_adaptation_layer(sk
, optval
, optlen
);
4102 retval
= sctp_setsockopt_context(sk
, optval
, optlen
);
4104 case SCTP_FRAGMENT_INTERLEAVE
:
4105 retval
= sctp_setsockopt_fragment_interleave(sk
, optval
, optlen
);
4107 case SCTP_MAX_BURST
:
4108 retval
= sctp_setsockopt_maxburst(sk
, optval
, optlen
);
4110 case SCTP_AUTH_CHUNK
:
4111 retval
= sctp_setsockopt_auth_chunk(sk
, optval
, optlen
);
4113 case SCTP_HMAC_IDENT
:
4114 retval
= sctp_setsockopt_hmac_ident(sk
, optval
, optlen
);
4117 retval
= sctp_setsockopt_auth_key(sk
, optval
, optlen
);
4119 case SCTP_AUTH_ACTIVE_KEY
:
4120 retval
= sctp_setsockopt_active_key(sk
, optval
, optlen
);
4122 case SCTP_AUTH_DELETE_KEY
:
4123 retval
= sctp_setsockopt_del_key(sk
, optval
, optlen
);
4125 case SCTP_AUTO_ASCONF
:
4126 retval
= sctp_setsockopt_auto_asconf(sk
, optval
, optlen
);
4128 case SCTP_PEER_ADDR_THLDS
:
4129 retval
= sctp_setsockopt_paddr_thresholds(sk
, optval
, optlen
);
4131 case SCTP_RECVRCVINFO
:
4132 retval
= sctp_setsockopt_recvrcvinfo(sk
, optval
, optlen
);
4134 case SCTP_RECVNXTINFO
:
4135 retval
= sctp_setsockopt_recvnxtinfo(sk
, optval
, optlen
);
4137 case SCTP_PR_SUPPORTED
:
4138 retval
= sctp_setsockopt_pr_supported(sk
, optval
, optlen
);
4140 case SCTP_DEFAULT_PRINFO
:
4141 retval
= sctp_setsockopt_default_prinfo(sk
, optval
, optlen
);
4143 case SCTP_RECONFIG_SUPPORTED
:
4144 retval
= sctp_setsockopt_reconfig_supported(sk
, optval
, optlen
);
4146 case SCTP_ENABLE_STREAM_RESET
:
4147 retval
= sctp_setsockopt_enable_strreset(sk
, optval
, optlen
);
4149 case SCTP_RESET_STREAMS
:
4150 retval
= sctp_setsockopt_reset_streams(sk
, optval
, optlen
);
4152 case SCTP_RESET_ASSOC
:
4153 retval
= sctp_setsockopt_reset_assoc(sk
, optval
, optlen
);
4155 case SCTP_ADD_STREAMS
:
4156 retval
= sctp_setsockopt_add_streams(sk
, optval
, optlen
);
4159 retval
= -ENOPROTOOPT
;
4169 /* API 3.1.6 connect() - UDP Style Syntax
4171 * An application may use the connect() call in the UDP model to initiate an
4172 * association without sending data.
4176 * ret = connect(int sd, const struct sockaddr *nam, socklen_t len);
4178 * sd: the socket descriptor to have a new association added to.
4180 * nam: the address structure (either struct sockaddr_in or struct
4181 * sockaddr_in6 defined in RFC2553 [7]).
4183 * len: the size of the address.
4185 static int sctp_connect(struct sock
*sk
, struct sockaddr
*addr
,
4193 pr_debug("%s: sk:%p, sockaddr:%p, addr_len:%d\n", __func__
, sk
,
4196 /* Validate addr_len before calling common connect/connectx routine. */
4197 af
= sctp_get_af_specific(addr
->sa_family
);
4198 if (!af
|| addr_len
< af
->sockaddr_len
) {
4201 /* Pass correct addr len to common routine (so it knows there
4202 * is only one address being passed.
4204 err
= __sctp_connect(sk
, addr
, af
->sockaddr_len
, NULL
);
4211 /* FIXME: Write comments. */
4212 static int sctp_disconnect(struct sock
*sk
, int flags
)
4214 return -EOPNOTSUPP
; /* STUB */
4217 /* 4.1.4 accept() - TCP Style Syntax
4219 * Applications use accept() call to remove an established SCTP
4220 * association from the accept queue of the endpoint. A new socket
4221 * descriptor will be returned from accept() to represent the newly
4222 * formed association.
4224 static struct sock
*sctp_accept(struct sock
*sk
, int flags
, int *err
, bool kern
)
4226 struct sctp_sock
*sp
;
4227 struct sctp_endpoint
*ep
;
4228 struct sock
*newsk
= NULL
;
4229 struct sctp_association
*asoc
;
4238 if (!sctp_style(sk
, TCP
)) {
4239 error
= -EOPNOTSUPP
;
4243 if (!sctp_sstate(sk
, LISTENING
)) {
4248 timeo
= sock_rcvtimeo(sk
, flags
& O_NONBLOCK
);
4250 error
= sctp_wait_for_accept(sk
, timeo
);
4254 /* We treat the list of associations on the endpoint as the accept
4255 * queue and pick the first association on the list.
4257 asoc
= list_entry(ep
->asocs
.next
, struct sctp_association
, asocs
);
4259 newsk
= sp
->pf
->create_accept_sk(sk
, asoc
, kern
);
4265 /* Populate the fields of the newsk from the oldsk and migrate the
4266 * asoc to the newsk.
4268 sctp_sock_migrate(sk
, newsk
, asoc
, SCTP_SOCKET_TCP
);
4276 /* The SCTP ioctl handler. */
4277 static int sctp_ioctl(struct sock
*sk
, int cmd
, unsigned long arg
)
4284 * SEQPACKET-style sockets in LISTENING state are valid, for
4285 * SCTP, so only discard TCP-style sockets in LISTENING state.
4287 if (sctp_style(sk
, TCP
) && sctp_sstate(sk
, LISTENING
))
4292 struct sk_buff
*skb
;
4293 unsigned int amount
= 0;
4295 skb
= skb_peek(&sk
->sk_receive_queue
);
4298 * We will only return the amount of this packet since
4299 * that is all that will be read.
4303 rc
= put_user(amount
, (int __user
*)arg
);
4315 /* This is the function which gets called during socket creation to
4316 * initialized the SCTP-specific portion of the sock.
4317 * The sock structure should already be zero-filled memory.
4319 static int sctp_init_sock(struct sock
*sk
)
4321 struct net
*net
= sock_net(sk
);
4322 struct sctp_sock
*sp
;
4324 pr_debug("%s: sk:%p\n", __func__
, sk
);
4328 /* Initialize the SCTP per socket area. */
4329 switch (sk
->sk_type
) {
4330 case SOCK_SEQPACKET
:
4331 sp
->type
= SCTP_SOCKET_UDP
;
4334 sp
->type
= SCTP_SOCKET_TCP
;
4337 return -ESOCKTNOSUPPORT
;
4340 sk
->sk_gso_type
= SKB_GSO_SCTP
;
4342 /* Initialize default send parameters. These parameters can be
4343 * modified with the SCTP_DEFAULT_SEND_PARAM socket option.
4345 sp
->default_stream
= 0;
4346 sp
->default_ppid
= 0;
4347 sp
->default_flags
= 0;
4348 sp
->default_context
= 0;
4349 sp
->default_timetolive
= 0;
4351 sp
->default_rcv_context
= 0;
4352 sp
->max_burst
= net
->sctp
.max_burst
;
4354 sp
->sctp_hmac_alg
= net
->sctp
.sctp_hmac_alg
;
4356 /* Initialize default setup parameters. These parameters
4357 * can be modified with the SCTP_INITMSG socket option or
4358 * overridden by the SCTP_INIT CMSG.
4360 sp
->initmsg
.sinit_num_ostreams
= sctp_max_outstreams
;
4361 sp
->initmsg
.sinit_max_instreams
= sctp_max_instreams
;
4362 sp
->initmsg
.sinit_max_attempts
= net
->sctp
.max_retrans_init
;
4363 sp
->initmsg
.sinit_max_init_timeo
= net
->sctp
.rto_max
;
4365 /* Initialize default RTO related parameters. These parameters can
4366 * be modified for with the SCTP_RTOINFO socket option.
4368 sp
->rtoinfo
.srto_initial
= net
->sctp
.rto_initial
;
4369 sp
->rtoinfo
.srto_max
= net
->sctp
.rto_max
;
4370 sp
->rtoinfo
.srto_min
= net
->sctp
.rto_min
;
4372 /* Initialize default association related parameters. These parameters
4373 * can be modified with the SCTP_ASSOCINFO socket option.
4375 sp
->assocparams
.sasoc_asocmaxrxt
= net
->sctp
.max_retrans_association
;
4376 sp
->assocparams
.sasoc_number_peer_destinations
= 0;
4377 sp
->assocparams
.sasoc_peer_rwnd
= 0;
4378 sp
->assocparams
.sasoc_local_rwnd
= 0;
4379 sp
->assocparams
.sasoc_cookie_life
= net
->sctp
.valid_cookie_life
;
4381 /* Initialize default event subscriptions. By default, all the
4384 memset(&sp
->subscribe
, 0, sizeof(struct sctp_event_subscribe
));
4386 /* Default Peer Address Parameters. These defaults can
4387 * be modified via SCTP_PEER_ADDR_PARAMS
4389 sp
->hbinterval
= net
->sctp
.hb_interval
;
4390 sp
->pathmaxrxt
= net
->sctp
.max_retrans_path
;
4391 sp
->pathmtu
= 0; /* allow default discovery */
4392 sp
->sackdelay
= net
->sctp
.sack_timeout
;
4394 sp
->param_flags
= SPP_HB_ENABLE
|
4396 SPP_SACKDELAY_ENABLE
;
4398 /* If enabled no SCTP message fragmentation will be performed.
4399 * Configure through SCTP_DISABLE_FRAGMENTS socket option.
4401 sp
->disable_fragments
= 0;
4403 /* Enable Nagle algorithm by default. */
4406 sp
->recvrcvinfo
= 0;
4407 sp
->recvnxtinfo
= 0;
4409 /* Enable by default. */
4412 /* Auto-close idle associations after the configured
4413 * number of seconds. A value of 0 disables this
4414 * feature. Configure through the SCTP_AUTOCLOSE socket option,
4415 * for UDP-style sockets only.
4419 /* User specified fragmentation limit. */
4422 sp
->adaptation_ind
= 0;
4424 sp
->pf
= sctp_get_pf_specific(sk
->sk_family
);
4426 /* Control variables for partial data delivery. */
4427 atomic_set(&sp
->pd_mode
, 0);
4428 skb_queue_head_init(&sp
->pd_lobby
);
4429 sp
->frag_interleave
= 0;
4431 /* Create a per socket endpoint structure. Even if we
4432 * change the data structure relationships, this may still
4433 * be useful for storing pre-connect address information.
4435 sp
->ep
= sctp_endpoint_new(sk
, GFP_KERNEL
);
4441 sk
->sk_destruct
= sctp_destruct_sock
;
4443 SCTP_DBG_OBJCNT_INC(sock
);
4446 sk_sockets_allocated_inc(sk
);
4447 sock_prot_inuse_add(net
, sk
->sk_prot
, 1);
4449 /* Nothing can fail after this block, otherwise
4450 * sctp_destroy_sock() will be called without addr_wq_lock held
4452 if (net
->sctp
.default_auto_asconf
) {
4453 spin_lock(&sock_net(sk
)->sctp
.addr_wq_lock
);
4454 list_add_tail(&sp
->auto_asconf_list
,
4455 &net
->sctp
.auto_asconf_splist
);
4456 sp
->do_auto_asconf
= 1;
4457 spin_unlock(&sock_net(sk
)->sctp
.addr_wq_lock
);
4459 sp
->do_auto_asconf
= 0;
4467 /* Cleanup any SCTP per socket resources. Must be called with
4468 * sock_net(sk)->sctp.addr_wq_lock held if sp->do_auto_asconf is true
4470 static void sctp_destroy_sock(struct sock
*sk
)
4472 struct sctp_sock
*sp
;
4474 pr_debug("%s: sk:%p\n", __func__
, sk
);
4476 /* Release our hold on the endpoint. */
4478 /* This could happen during socket init, thus we bail out
4479 * early, since the rest of the below is not setup either.
4484 if (sp
->do_auto_asconf
) {
4485 sp
->do_auto_asconf
= 0;
4486 list_del(&sp
->auto_asconf_list
);
4488 sctp_endpoint_free(sp
->ep
);
4490 sk_sockets_allocated_dec(sk
);
4491 sock_prot_inuse_add(sock_net(sk
), sk
->sk_prot
, -1);
4495 /* Triggered when there are no references on the socket anymore */
4496 static void sctp_destruct_sock(struct sock
*sk
)
4498 struct sctp_sock
*sp
= sctp_sk(sk
);
4500 /* Free up the HMAC transform. */
4501 crypto_free_shash(sp
->hmac
);
4503 inet_sock_destruct(sk
);
4506 /* API 4.1.7 shutdown() - TCP Style Syntax
4507 * int shutdown(int socket, int how);
4509 * sd - the socket descriptor of the association to be closed.
4510 * how - Specifies the type of shutdown. The values are
4513 * Disables further receive operations. No SCTP
4514 * protocol action is taken.
4516 * Disables further send operations, and initiates
4517 * the SCTP shutdown sequence.
4519 * Disables further send and receive operations
4520 * and initiates the SCTP shutdown sequence.
4522 static void sctp_shutdown(struct sock
*sk
, int how
)
4524 struct net
*net
= sock_net(sk
);
4525 struct sctp_endpoint
*ep
;
4527 if (!sctp_style(sk
, TCP
))
4530 ep
= sctp_sk(sk
)->ep
;
4531 if (how
& SEND_SHUTDOWN
&& !list_empty(&ep
->asocs
)) {
4532 struct sctp_association
*asoc
;
4534 sk
->sk_state
= SCTP_SS_CLOSING
;
4535 asoc
= list_entry(ep
->asocs
.next
,
4536 struct sctp_association
, asocs
);
4537 sctp_primitive_SHUTDOWN(net
, asoc
, NULL
);
4541 int sctp_get_sctp_info(struct sock
*sk
, struct sctp_association
*asoc
,
4542 struct sctp_info
*info
)
4544 struct sctp_transport
*prim
;
4545 struct list_head
*pos
;
4548 memset(info
, 0, sizeof(*info
));
4550 struct sctp_sock
*sp
= sctp_sk(sk
);
4552 info
->sctpi_s_autoclose
= sp
->autoclose
;
4553 info
->sctpi_s_adaptation_ind
= sp
->adaptation_ind
;
4554 info
->sctpi_s_pd_point
= sp
->pd_point
;
4555 info
->sctpi_s_nodelay
= sp
->nodelay
;
4556 info
->sctpi_s_disable_fragments
= sp
->disable_fragments
;
4557 info
->sctpi_s_v4mapped
= sp
->v4mapped
;
4558 info
->sctpi_s_frag_interleave
= sp
->frag_interleave
;
4559 info
->sctpi_s_type
= sp
->type
;
4564 info
->sctpi_tag
= asoc
->c
.my_vtag
;
4565 info
->sctpi_state
= asoc
->state
;
4566 info
->sctpi_rwnd
= asoc
->a_rwnd
;
4567 info
->sctpi_unackdata
= asoc
->unack_data
;
4568 info
->sctpi_penddata
= sctp_tsnmap_pending(&asoc
->peer
.tsn_map
);
4569 info
->sctpi_instrms
= asoc
->stream
.incnt
;
4570 info
->sctpi_outstrms
= asoc
->stream
.outcnt
;
4571 list_for_each(pos
, &asoc
->base
.inqueue
.in_chunk_list
)
4572 info
->sctpi_inqueue
++;
4573 list_for_each(pos
, &asoc
->outqueue
.out_chunk_list
)
4574 info
->sctpi_outqueue
++;
4575 info
->sctpi_overall_error
= asoc
->overall_error_count
;
4576 info
->sctpi_max_burst
= asoc
->max_burst
;
4577 info
->sctpi_maxseg
= asoc
->frag_point
;
4578 info
->sctpi_peer_rwnd
= asoc
->peer
.rwnd
;
4579 info
->sctpi_peer_tag
= asoc
->c
.peer_vtag
;
4581 mask
= asoc
->peer
.ecn_capable
<< 1;
4582 mask
= (mask
| asoc
->peer
.ipv4_address
) << 1;
4583 mask
= (mask
| asoc
->peer
.ipv6_address
) << 1;
4584 mask
= (mask
| asoc
->peer
.hostname_address
) << 1;
4585 mask
= (mask
| asoc
->peer
.asconf_capable
) << 1;
4586 mask
= (mask
| asoc
->peer
.prsctp_capable
) << 1;
4587 mask
= (mask
| asoc
->peer
.auth_capable
);
4588 info
->sctpi_peer_capable
= mask
;
4589 mask
= asoc
->peer
.sack_needed
<< 1;
4590 mask
= (mask
| asoc
->peer
.sack_generation
) << 1;
4591 mask
= (mask
| asoc
->peer
.zero_window_announced
);
4592 info
->sctpi_peer_sack
= mask
;
4594 info
->sctpi_isacks
= asoc
->stats
.isacks
;
4595 info
->sctpi_osacks
= asoc
->stats
.osacks
;
4596 info
->sctpi_opackets
= asoc
->stats
.opackets
;
4597 info
->sctpi_ipackets
= asoc
->stats
.ipackets
;
4598 info
->sctpi_rtxchunks
= asoc
->stats
.rtxchunks
;
4599 info
->sctpi_outofseqtsns
= asoc
->stats
.outofseqtsns
;
4600 info
->sctpi_idupchunks
= asoc
->stats
.idupchunks
;
4601 info
->sctpi_gapcnt
= asoc
->stats
.gapcnt
;
4602 info
->sctpi_ouodchunks
= asoc
->stats
.ouodchunks
;
4603 info
->sctpi_iuodchunks
= asoc
->stats
.iuodchunks
;
4604 info
->sctpi_oodchunks
= asoc
->stats
.oodchunks
;
4605 info
->sctpi_iodchunks
= asoc
->stats
.iodchunks
;
4606 info
->sctpi_octrlchunks
= asoc
->stats
.octrlchunks
;
4607 info
->sctpi_ictrlchunks
= asoc
->stats
.ictrlchunks
;
4609 prim
= asoc
->peer
.primary_path
;
4610 memcpy(&info
->sctpi_p_address
, &prim
->ipaddr
, sizeof(prim
->ipaddr
));
4611 info
->sctpi_p_state
= prim
->state
;
4612 info
->sctpi_p_cwnd
= prim
->cwnd
;
4613 info
->sctpi_p_srtt
= prim
->srtt
;
4614 info
->sctpi_p_rto
= jiffies_to_msecs(prim
->rto
);
4615 info
->sctpi_p_hbinterval
= prim
->hbinterval
;
4616 info
->sctpi_p_pathmaxrxt
= prim
->pathmaxrxt
;
4617 info
->sctpi_p_sackdelay
= jiffies_to_msecs(prim
->sackdelay
);
4618 info
->sctpi_p_ssthresh
= prim
->ssthresh
;
4619 info
->sctpi_p_partial_bytes_acked
= prim
->partial_bytes_acked
;
4620 info
->sctpi_p_flight_size
= prim
->flight_size
;
4621 info
->sctpi_p_error
= prim
->error_count
;
4625 EXPORT_SYMBOL_GPL(sctp_get_sctp_info
);
4627 /* use callback to avoid exporting the core structure */
4628 int sctp_transport_walk_start(struct rhashtable_iter
*iter
)
4632 rhltable_walk_enter(&sctp_transport_hashtable
, iter
);
4634 err
= rhashtable_walk_start(iter
);
4635 if (err
&& err
!= -EAGAIN
) {
4636 rhashtable_walk_stop(iter
);
4637 rhashtable_walk_exit(iter
);
4644 void sctp_transport_walk_stop(struct rhashtable_iter
*iter
)
4646 rhashtable_walk_stop(iter
);
4647 rhashtable_walk_exit(iter
);
4650 struct sctp_transport
*sctp_transport_get_next(struct net
*net
,
4651 struct rhashtable_iter
*iter
)
4653 struct sctp_transport
*t
;
4655 t
= rhashtable_walk_next(iter
);
4656 for (; t
; t
= rhashtable_walk_next(iter
)) {
4658 if (PTR_ERR(t
) == -EAGAIN
)
4663 if (!sctp_transport_hold(t
))
4666 if (net_eq(sock_net(t
->asoc
->base
.sk
), net
) &&
4667 t
->asoc
->peer
.primary_path
== t
)
4670 sctp_transport_put(t
);
4676 struct sctp_transport
*sctp_transport_get_idx(struct net
*net
,
4677 struct rhashtable_iter
*iter
,
4680 struct sctp_transport
*t
;
4683 return SEQ_START_TOKEN
;
4685 while ((t
= sctp_transport_get_next(net
, iter
)) && !IS_ERR(t
)) {
4688 sctp_transport_put(t
);
4694 int sctp_for_each_endpoint(int (*cb
)(struct sctp_endpoint
*, void *),
4698 struct sctp_ep_common
*epb
;
4699 struct sctp_hashbucket
*head
;
4701 for (head
= sctp_ep_hashtable
; hash
< sctp_ep_hashsize
;
4703 read_lock_bh(&head
->lock
);
4704 sctp_for_each_hentry(epb
, &head
->chain
) {
4705 err
= cb(sctp_ep(epb
), p
);
4709 read_unlock_bh(&head
->lock
);
4714 EXPORT_SYMBOL_GPL(sctp_for_each_endpoint
);
4716 int sctp_transport_lookup_process(int (*cb
)(struct sctp_transport
*, void *),
4718 const union sctp_addr
*laddr
,
4719 const union sctp_addr
*paddr
, void *p
)
4721 struct sctp_transport
*transport
;
4725 transport
= sctp_addrs_lookup_transport(net
, laddr
, paddr
);
4730 err
= cb(transport
, p
);
4731 sctp_transport_put(transport
);
4735 EXPORT_SYMBOL_GPL(sctp_transport_lookup_process
);
4737 int sctp_for_each_transport(int (*cb
)(struct sctp_transport
*, void *),
4738 int (*cb_done
)(struct sctp_transport
*, void *),
4739 struct net
*net
, int *pos
, void *p
) {
4740 struct rhashtable_iter hti
;
4741 struct sctp_transport
*tsp
;
4745 ret
= sctp_transport_walk_start(&hti
);
4749 tsp
= sctp_transport_get_idx(net
, &hti
, *pos
+ 1);
4750 for (; !IS_ERR_OR_NULL(tsp
); tsp
= sctp_transport_get_next(net
, &hti
)) {
4755 sctp_transport_put(tsp
);
4757 sctp_transport_walk_stop(&hti
);
4760 if (cb_done
&& !cb_done(tsp
, p
)) {
4762 sctp_transport_put(tsp
);
4765 sctp_transport_put(tsp
);
4770 EXPORT_SYMBOL_GPL(sctp_for_each_transport
);
4772 /* 7.2.1 Association Status (SCTP_STATUS)
4774 * Applications can retrieve current status information about an
4775 * association, including association state, peer receiver window size,
4776 * number of unacked data chunks, and number of data chunks pending
4777 * receipt. This information is read-only.
4779 static int sctp_getsockopt_sctp_status(struct sock
*sk
, int len
,
4780 char __user
*optval
,
4783 struct sctp_status status
;
4784 struct sctp_association
*asoc
= NULL
;
4785 struct sctp_transport
*transport
;
4786 sctp_assoc_t associd
;
4789 if (len
< sizeof(status
)) {
4794 len
= sizeof(status
);
4795 if (copy_from_user(&status
, optval
, len
)) {
4800 associd
= status
.sstat_assoc_id
;
4801 asoc
= sctp_id2assoc(sk
, associd
);
4807 transport
= asoc
->peer
.primary_path
;
4809 status
.sstat_assoc_id
= sctp_assoc2id(asoc
);
4810 status
.sstat_state
= sctp_assoc_to_state(asoc
);
4811 status
.sstat_rwnd
= asoc
->peer
.rwnd
;
4812 status
.sstat_unackdata
= asoc
->unack_data
;
4814 status
.sstat_penddata
= sctp_tsnmap_pending(&asoc
->peer
.tsn_map
);
4815 status
.sstat_instrms
= asoc
->stream
.incnt
;
4816 status
.sstat_outstrms
= asoc
->stream
.outcnt
;
4817 status
.sstat_fragmentation_point
= asoc
->frag_point
;
4818 status
.sstat_primary
.spinfo_assoc_id
= sctp_assoc2id(transport
->asoc
);
4819 memcpy(&status
.sstat_primary
.spinfo_address
, &transport
->ipaddr
,
4820 transport
->af_specific
->sockaddr_len
);
4821 /* Map ipv4 address into v4-mapped-on-v6 address. */
4822 sctp_get_pf_specific(sk
->sk_family
)->addr_to_user(sctp_sk(sk
),
4823 (union sctp_addr
*)&status
.sstat_primary
.spinfo_address
);
4824 status
.sstat_primary
.spinfo_state
= transport
->state
;
4825 status
.sstat_primary
.spinfo_cwnd
= transport
->cwnd
;
4826 status
.sstat_primary
.spinfo_srtt
= transport
->srtt
;
4827 status
.sstat_primary
.spinfo_rto
= jiffies_to_msecs(transport
->rto
);
4828 status
.sstat_primary
.spinfo_mtu
= transport
->pathmtu
;
4830 if (status
.sstat_primary
.spinfo_state
== SCTP_UNKNOWN
)
4831 status
.sstat_primary
.spinfo_state
= SCTP_ACTIVE
;
4833 if (put_user(len
, optlen
)) {
4838 pr_debug("%s: len:%d, state:%d, rwnd:%d, assoc_id:%d\n",
4839 __func__
, len
, status
.sstat_state
, status
.sstat_rwnd
,
4840 status
.sstat_assoc_id
);
4842 if (copy_to_user(optval
, &status
, len
)) {
4852 /* 7.2.2 Peer Address Information (SCTP_GET_PEER_ADDR_INFO)
4854 * Applications can retrieve information about a specific peer address
4855 * of an association, including its reachability state, congestion
4856 * window, and retransmission timer values. This information is
4859 static int sctp_getsockopt_peer_addr_info(struct sock
*sk
, int len
,
4860 char __user
*optval
,
4863 struct sctp_paddrinfo pinfo
;
4864 struct sctp_transport
*transport
;
4867 if (len
< sizeof(pinfo
)) {
4872 len
= sizeof(pinfo
);
4873 if (copy_from_user(&pinfo
, optval
, len
)) {
4878 transport
= sctp_addr_id2transport(sk
, &pinfo
.spinfo_address
,
4879 pinfo
.spinfo_assoc_id
);
4883 pinfo
.spinfo_assoc_id
= sctp_assoc2id(transport
->asoc
);
4884 pinfo
.spinfo_state
= transport
->state
;
4885 pinfo
.spinfo_cwnd
= transport
->cwnd
;
4886 pinfo
.spinfo_srtt
= transport
->srtt
;
4887 pinfo
.spinfo_rto
= jiffies_to_msecs(transport
->rto
);
4888 pinfo
.spinfo_mtu
= transport
->pathmtu
;
4890 if (pinfo
.spinfo_state
== SCTP_UNKNOWN
)
4891 pinfo
.spinfo_state
= SCTP_ACTIVE
;
4893 if (put_user(len
, optlen
)) {
4898 if (copy_to_user(optval
, &pinfo
, len
)) {
4907 /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS)
4909 * This option is a on/off flag. If enabled no SCTP message
4910 * fragmentation will be performed. Instead if a message being sent
4911 * exceeds the current PMTU size, the message will NOT be sent and
4912 * instead a error will be indicated to the user.
4914 static int sctp_getsockopt_disable_fragments(struct sock
*sk
, int len
,
4915 char __user
*optval
, int __user
*optlen
)
4919 if (len
< sizeof(int))
4923 val
= (sctp_sk(sk
)->disable_fragments
== 1);
4924 if (put_user(len
, optlen
))
4926 if (copy_to_user(optval
, &val
, len
))
4931 /* 7.1.15 Set notification and ancillary events (SCTP_EVENTS)
4933 * This socket option is used to specify various notifications and
4934 * ancillary data the user wishes to receive.
4936 static int sctp_getsockopt_events(struct sock
*sk
, int len
, char __user
*optval
,
4941 if (len
> sizeof(struct sctp_event_subscribe
))
4942 len
= sizeof(struct sctp_event_subscribe
);
4943 if (put_user(len
, optlen
))
4945 if (copy_to_user(optval
, &sctp_sk(sk
)->subscribe
, len
))
4950 /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE)
4952 * This socket option is applicable to the UDP-style socket only. When
4953 * set it will cause associations that are idle for more than the
4954 * specified number of seconds to automatically close. An association
4955 * being idle is defined an association that has NOT sent or received
4956 * user data. The special value of '0' indicates that no automatic
4957 * close of any associations should be performed. The option expects an
4958 * integer defining the number of seconds of idle time before an
4959 * association is closed.
4961 static int sctp_getsockopt_autoclose(struct sock
*sk
, int len
, char __user
*optval
, int __user
*optlen
)
4963 /* Applicable to UDP-style socket only */
4964 if (sctp_style(sk
, TCP
))
4966 if (len
< sizeof(int))
4969 if (put_user(len
, optlen
))
4971 if (copy_to_user(optval
, &sctp_sk(sk
)->autoclose
, len
))
4976 /* Helper routine to branch off an association to a new socket. */
4977 int sctp_do_peeloff(struct sock
*sk
, sctp_assoc_t id
, struct socket
**sockp
)
4979 struct sctp_association
*asoc
= sctp_id2assoc(sk
, id
);
4980 struct sctp_sock
*sp
= sctp_sk(sk
);
4981 struct socket
*sock
;
4984 /* Do not peel off from one netns to another one. */
4985 if (!net_eq(current
->nsproxy
->net_ns
, sock_net(sk
)))
4991 /* An association cannot be branched off from an already peeled-off
4992 * socket, nor is this supported for tcp style sockets.
4994 if (!sctp_style(sk
, UDP
))
4997 /* Create a new socket. */
4998 err
= sock_create(sk
->sk_family
, SOCK_SEQPACKET
, IPPROTO_SCTP
, &sock
);
5002 sctp_copy_sock(sock
->sk
, sk
, asoc
);
5004 /* Make peeled-off sockets more like 1-1 accepted sockets.
5005 * Set the daddr and initialize id to something more random
5007 sp
->pf
->to_sk_daddr(&asoc
->peer
.primary_addr
, sk
);
5009 /* Populate the fields of the newsk from the oldsk and migrate the
5010 * asoc to the newsk.
5012 sctp_sock_migrate(sk
, sock
->sk
, asoc
, SCTP_SOCKET_UDP_HIGH_BANDWIDTH
);
5018 EXPORT_SYMBOL(sctp_do_peeloff
);
5020 static int sctp_getsockopt_peeloff_common(struct sock
*sk
, sctp_peeloff_arg_t
*peeloff
,
5021 struct file
**newfile
, unsigned flags
)
5023 struct socket
*newsock
;
5026 retval
= sctp_do_peeloff(sk
, peeloff
->associd
, &newsock
);
5030 /* Map the socket to an unused fd that can be returned to the user. */
5031 retval
= get_unused_fd_flags(flags
& SOCK_CLOEXEC
);
5033 sock_release(newsock
);
5037 *newfile
= sock_alloc_file(newsock
, 0, NULL
);
5038 if (IS_ERR(*newfile
)) {
5039 put_unused_fd(retval
);
5040 sock_release(newsock
);
5041 retval
= PTR_ERR(*newfile
);
5046 pr_debug("%s: sk:%p, newsk:%p, sd:%d\n", __func__
, sk
, newsock
->sk
,
5049 peeloff
->sd
= retval
;
5051 if (flags
& SOCK_NONBLOCK
)
5052 (*newfile
)->f_flags
|= O_NONBLOCK
;
5057 static int sctp_getsockopt_peeloff(struct sock
*sk
, int len
, char __user
*optval
, int __user
*optlen
)
5059 sctp_peeloff_arg_t peeloff
;
5060 struct file
*newfile
= NULL
;
5063 if (len
< sizeof(sctp_peeloff_arg_t
))
5065 len
= sizeof(sctp_peeloff_arg_t
);
5066 if (copy_from_user(&peeloff
, optval
, len
))
5069 retval
= sctp_getsockopt_peeloff_common(sk
, &peeloff
, &newfile
, 0);
5073 /* Return the fd mapped to the new socket. */
5074 if (put_user(len
, optlen
)) {
5076 put_unused_fd(retval
);
5080 if (copy_to_user(optval
, &peeloff
, len
)) {
5082 put_unused_fd(retval
);
5085 fd_install(retval
, newfile
);
5090 static int sctp_getsockopt_peeloff_flags(struct sock
*sk
, int len
,
5091 char __user
*optval
, int __user
*optlen
)
5093 sctp_peeloff_flags_arg_t peeloff
;
5094 struct file
*newfile
= NULL
;
5097 if (len
< sizeof(sctp_peeloff_flags_arg_t
))
5099 len
= sizeof(sctp_peeloff_flags_arg_t
);
5100 if (copy_from_user(&peeloff
, optval
, len
))
5103 retval
= sctp_getsockopt_peeloff_common(sk
, &peeloff
.p_arg
,
5104 &newfile
, peeloff
.flags
);
5108 /* Return the fd mapped to the new socket. */
5109 if (put_user(len
, optlen
)) {
5111 put_unused_fd(retval
);
5115 if (copy_to_user(optval
, &peeloff
, len
)) {
5117 put_unused_fd(retval
);
5120 fd_install(retval
, newfile
);
5125 /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS)
5127 * Applications can enable or disable heartbeats for any peer address of
5128 * an association, modify an address's heartbeat interval, force a
5129 * heartbeat to be sent immediately, and adjust the address's maximum
5130 * number of retransmissions sent before an address is considered
5131 * unreachable. The following structure is used to access and modify an
5132 * address's parameters:
5134 * struct sctp_paddrparams {
5135 * sctp_assoc_t spp_assoc_id;
5136 * struct sockaddr_storage spp_address;
5137 * uint32_t spp_hbinterval;
5138 * uint16_t spp_pathmaxrxt;
5139 * uint32_t spp_pathmtu;
5140 * uint32_t spp_sackdelay;
5141 * uint32_t spp_flags;
5144 * spp_assoc_id - (one-to-many style socket) This is filled in the
5145 * application, and identifies the association for
5147 * spp_address - This specifies which address is of interest.
5148 * spp_hbinterval - This contains the value of the heartbeat interval,
5149 * in milliseconds. If a value of zero
5150 * is present in this field then no changes are to
5151 * be made to this parameter.
5152 * spp_pathmaxrxt - This contains the maximum number of
5153 * retransmissions before this address shall be
5154 * considered unreachable. If a value of zero
5155 * is present in this field then no changes are to
5156 * be made to this parameter.
5157 * spp_pathmtu - When Path MTU discovery is disabled the value
5158 * specified here will be the "fixed" path mtu.
5159 * Note that if the spp_address field is empty
5160 * then all associations on this address will
5161 * have this fixed path mtu set upon them.
5163 * spp_sackdelay - When delayed sack is enabled, this value specifies
5164 * the number of milliseconds that sacks will be delayed
5165 * for. This value will apply to all addresses of an
5166 * association if the spp_address field is empty. Note
5167 * also, that if delayed sack is enabled and this
5168 * value is set to 0, no change is made to the last
5169 * recorded delayed sack timer value.
5171 * spp_flags - These flags are used to control various features
5172 * on an association. The flag field may contain
5173 * zero or more of the following options.
5175 * SPP_HB_ENABLE - Enable heartbeats on the
5176 * specified address. Note that if the address
5177 * field is empty all addresses for the association
5178 * have heartbeats enabled upon them.
5180 * SPP_HB_DISABLE - Disable heartbeats on the
5181 * speicifed address. Note that if the address
5182 * field is empty all addresses for the association
5183 * will have their heartbeats disabled. Note also
5184 * that SPP_HB_ENABLE and SPP_HB_DISABLE are
5185 * mutually exclusive, only one of these two should
5186 * be specified. Enabling both fields will have
5187 * undetermined results.
5189 * SPP_HB_DEMAND - Request a user initiated heartbeat
5190 * to be made immediately.
5192 * SPP_PMTUD_ENABLE - This field will enable PMTU
5193 * discovery upon the specified address. Note that
5194 * if the address feild is empty then all addresses
5195 * on the association are effected.
5197 * SPP_PMTUD_DISABLE - This field will disable PMTU
5198 * discovery upon the specified address. Note that
5199 * if the address feild is empty then all addresses
5200 * on the association are effected. Not also that
5201 * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually
5202 * exclusive. Enabling both will have undetermined
5205 * SPP_SACKDELAY_ENABLE - Setting this flag turns
5206 * on delayed sack. The time specified in spp_sackdelay
5207 * is used to specify the sack delay for this address. Note
5208 * that if spp_address is empty then all addresses will
5209 * enable delayed sack and take on the sack delay
5210 * value specified in spp_sackdelay.
5211 * SPP_SACKDELAY_DISABLE - Setting this flag turns
5212 * off delayed sack. If the spp_address field is blank then
5213 * delayed sack is disabled for the entire association. Note
5214 * also that this field is mutually exclusive to
5215 * SPP_SACKDELAY_ENABLE, setting both will have undefined
5218 static int sctp_getsockopt_peer_addr_params(struct sock
*sk
, int len
,
5219 char __user
*optval
, int __user
*optlen
)
5221 struct sctp_paddrparams params
;
5222 struct sctp_transport
*trans
= NULL
;
5223 struct sctp_association
*asoc
= NULL
;
5224 struct sctp_sock
*sp
= sctp_sk(sk
);
5226 if (len
< sizeof(struct sctp_paddrparams
))
5228 len
= sizeof(struct sctp_paddrparams
);
5229 if (copy_from_user(¶ms
, optval
, len
))
5232 /* If an address other than INADDR_ANY is specified, and
5233 * no transport is found, then the request is invalid.
5235 if (!sctp_is_any(sk
, (union sctp_addr
*)¶ms
.spp_address
)) {
5236 trans
= sctp_addr_id2transport(sk
, ¶ms
.spp_address
,
5237 params
.spp_assoc_id
);
5239 pr_debug("%s: failed no transport\n", __func__
);
5244 /* Get association, if assoc_id != 0 and the socket is a one
5245 * to many style socket, and an association was not found, then
5246 * the id was invalid.
5248 asoc
= sctp_id2assoc(sk
, params
.spp_assoc_id
);
5249 if (!asoc
&& params
.spp_assoc_id
&& sctp_style(sk
, UDP
)) {
5250 pr_debug("%s: failed no association\n", __func__
);
5255 /* Fetch transport values. */
5256 params
.spp_hbinterval
= jiffies_to_msecs(trans
->hbinterval
);
5257 params
.spp_pathmtu
= trans
->pathmtu
;
5258 params
.spp_pathmaxrxt
= trans
->pathmaxrxt
;
5259 params
.spp_sackdelay
= jiffies_to_msecs(trans
->sackdelay
);
5261 /*draft-11 doesn't say what to return in spp_flags*/
5262 params
.spp_flags
= trans
->param_flags
;
5264 /* Fetch association values. */
5265 params
.spp_hbinterval
= jiffies_to_msecs(asoc
->hbinterval
);
5266 params
.spp_pathmtu
= asoc
->pathmtu
;
5267 params
.spp_pathmaxrxt
= asoc
->pathmaxrxt
;
5268 params
.spp_sackdelay
= jiffies_to_msecs(asoc
->sackdelay
);
5270 /*draft-11 doesn't say what to return in spp_flags*/
5271 params
.spp_flags
= asoc
->param_flags
;
5273 /* Fetch socket values. */
5274 params
.spp_hbinterval
= sp
->hbinterval
;
5275 params
.spp_pathmtu
= sp
->pathmtu
;
5276 params
.spp_sackdelay
= sp
->sackdelay
;
5277 params
.spp_pathmaxrxt
= sp
->pathmaxrxt
;
5279 /*draft-11 doesn't say what to return in spp_flags*/
5280 params
.spp_flags
= sp
->param_flags
;
5283 if (copy_to_user(optval
, ¶ms
, len
))
5286 if (put_user(len
, optlen
))
5293 * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK)
5295 * This option will effect the way delayed acks are performed. This
5296 * option allows you to get or set the delayed ack time, in
5297 * milliseconds. It also allows changing the delayed ack frequency.
5298 * Changing the frequency to 1 disables the delayed sack algorithm. If
5299 * the assoc_id is 0, then this sets or gets the endpoints default
5300 * values. If the assoc_id field is non-zero, then the set or get
5301 * effects the specified association for the one to many model (the
5302 * assoc_id field is ignored by the one to one model). Note that if
5303 * sack_delay or sack_freq are 0 when setting this option, then the
5304 * current values will remain unchanged.
5306 * struct sctp_sack_info {
5307 * sctp_assoc_t sack_assoc_id;
5308 * uint32_t sack_delay;
5309 * uint32_t sack_freq;
5312 * sack_assoc_id - This parameter, indicates which association the user
5313 * is performing an action upon. Note that if this field's value is
5314 * zero then the endpoints default value is changed (effecting future
5315 * associations only).
5317 * sack_delay - This parameter contains the number of milliseconds that
5318 * the user is requesting the delayed ACK timer be set to. Note that
5319 * this value is defined in the standard to be between 200 and 500
5322 * sack_freq - This parameter contains the number of packets that must
5323 * be received before a sack is sent without waiting for the delay
5324 * timer to expire. The default value for this is 2, setting this
5325 * value to 1 will disable the delayed sack algorithm.
5327 static int sctp_getsockopt_delayed_ack(struct sock
*sk
, int len
,
5328 char __user
*optval
,
5331 struct sctp_sack_info params
;
5332 struct sctp_association
*asoc
= NULL
;
5333 struct sctp_sock
*sp
= sctp_sk(sk
);
5335 if (len
>= sizeof(struct sctp_sack_info
)) {
5336 len
= sizeof(struct sctp_sack_info
);
5338 if (copy_from_user(¶ms
, optval
, len
))
5340 } else if (len
== sizeof(struct sctp_assoc_value
)) {
5341 pr_warn_ratelimited(DEPRECATED
5343 "Use of struct sctp_assoc_value in delayed_ack socket option.\n"
5344 "Use struct sctp_sack_info instead\n",
5345 current
->comm
, task_pid_nr(current
));
5346 if (copy_from_user(¶ms
, optval
, len
))
5351 /* Get association, if sack_assoc_id != 0 and the socket is a one
5352 * to many style socket, and an association was not found, then
5353 * the id was invalid.
5355 asoc
= sctp_id2assoc(sk
, params
.sack_assoc_id
);
5356 if (!asoc
&& params
.sack_assoc_id
&& sctp_style(sk
, UDP
))
5360 /* Fetch association values. */
5361 if (asoc
->param_flags
& SPP_SACKDELAY_ENABLE
) {
5362 params
.sack_delay
= jiffies_to_msecs(
5364 params
.sack_freq
= asoc
->sackfreq
;
5367 params
.sack_delay
= 0;
5368 params
.sack_freq
= 1;
5371 /* Fetch socket values. */
5372 if (sp
->param_flags
& SPP_SACKDELAY_ENABLE
) {
5373 params
.sack_delay
= sp
->sackdelay
;
5374 params
.sack_freq
= sp
->sackfreq
;
5376 params
.sack_delay
= 0;
5377 params
.sack_freq
= 1;
5381 if (copy_to_user(optval
, ¶ms
, len
))
5384 if (put_user(len
, optlen
))
5390 /* 7.1.3 Initialization Parameters (SCTP_INITMSG)
5392 * Applications can specify protocol parameters for the default association
5393 * initialization. The option name argument to setsockopt() and getsockopt()
5396 * Setting initialization parameters is effective only on an unconnected
5397 * socket (for UDP-style sockets only future associations are effected
5398 * by the change). With TCP-style sockets, this option is inherited by
5399 * sockets derived from a listener socket.
5401 static int sctp_getsockopt_initmsg(struct sock
*sk
, int len
, char __user
*optval
, int __user
*optlen
)
5403 if (len
< sizeof(struct sctp_initmsg
))
5405 len
= sizeof(struct sctp_initmsg
);
5406 if (put_user(len
, optlen
))
5408 if (copy_to_user(optval
, &sctp_sk(sk
)->initmsg
, len
))
5414 static int sctp_getsockopt_peer_addrs(struct sock
*sk
, int len
,
5415 char __user
*optval
, int __user
*optlen
)
5417 struct sctp_association
*asoc
;
5419 struct sctp_getaddrs getaddrs
;
5420 struct sctp_transport
*from
;
5422 union sctp_addr temp
;
5423 struct sctp_sock
*sp
= sctp_sk(sk
);
5428 if (len
< sizeof(struct sctp_getaddrs
))
5431 if (copy_from_user(&getaddrs
, optval
, sizeof(struct sctp_getaddrs
)))
5434 /* For UDP-style sockets, id specifies the association to query. */
5435 asoc
= sctp_id2assoc(sk
, getaddrs
.assoc_id
);
5439 to
= optval
+ offsetof(struct sctp_getaddrs
, addrs
);
5440 space_left
= len
- offsetof(struct sctp_getaddrs
, addrs
);
5442 list_for_each_entry(from
, &asoc
->peer
.transport_addr_list
,
5444 memcpy(&temp
, &from
->ipaddr
, sizeof(temp
));
5445 addrlen
= sctp_get_pf_specific(sk
->sk_family
)
5446 ->addr_to_user(sp
, &temp
);
5447 if (space_left
< addrlen
)
5449 if (copy_to_user(to
, &temp
, addrlen
))
5453 space_left
-= addrlen
;
5456 if (put_user(cnt
, &((struct sctp_getaddrs __user
*)optval
)->addr_num
))
5458 bytes_copied
= ((char __user
*)to
) - optval
;
5459 if (put_user(bytes_copied
, optlen
))
5465 static int sctp_copy_laddrs(struct sock
*sk
, __u16 port
, void *to
,
5466 size_t space_left
, int *bytes_copied
)
5468 struct sctp_sockaddr_entry
*addr
;
5469 union sctp_addr temp
;
5472 struct net
*net
= sock_net(sk
);
5475 list_for_each_entry_rcu(addr
, &net
->sctp
.local_addr_list
, list
) {
5479 if ((PF_INET
== sk
->sk_family
) &&
5480 (AF_INET6
== addr
->a
.sa
.sa_family
))
5482 if ((PF_INET6
== sk
->sk_family
) &&
5483 inet_v6_ipv6only(sk
) &&
5484 (AF_INET
== addr
->a
.sa
.sa_family
))
5486 memcpy(&temp
, &addr
->a
, sizeof(temp
));
5487 if (!temp
.v4
.sin_port
)
5488 temp
.v4
.sin_port
= htons(port
);
5490 addrlen
= sctp_get_pf_specific(sk
->sk_family
)
5491 ->addr_to_user(sctp_sk(sk
), &temp
);
5493 if (space_left
< addrlen
) {
5497 memcpy(to
, &temp
, addrlen
);
5501 space_left
-= addrlen
;
5502 *bytes_copied
+= addrlen
;
5510 static int sctp_getsockopt_local_addrs(struct sock
*sk
, int len
,
5511 char __user
*optval
, int __user
*optlen
)
5513 struct sctp_bind_addr
*bp
;
5514 struct sctp_association
*asoc
;
5516 struct sctp_getaddrs getaddrs
;
5517 struct sctp_sockaddr_entry
*addr
;
5519 union sctp_addr temp
;
5520 struct sctp_sock
*sp
= sctp_sk(sk
);
5524 int bytes_copied
= 0;
5528 if (len
< sizeof(struct sctp_getaddrs
))
5531 if (copy_from_user(&getaddrs
, optval
, sizeof(struct sctp_getaddrs
)))
5535 * For UDP-style sockets, id specifies the association to query.
5536 * If the id field is set to the value '0' then the locally bound
5537 * addresses are returned without regard to any particular
5540 if (0 == getaddrs
.assoc_id
) {
5541 bp
= &sctp_sk(sk
)->ep
->base
.bind_addr
;
5543 asoc
= sctp_id2assoc(sk
, getaddrs
.assoc_id
);
5546 bp
= &asoc
->base
.bind_addr
;
5549 to
= optval
+ offsetof(struct sctp_getaddrs
, addrs
);
5550 space_left
= len
- offsetof(struct sctp_getaddrs
, addrs
);
5552 addrs
= kmalloc(space_left
, GFP_USER
| __GFP_NOWARN
);
5556 /* If the endpoint is bound to 0.0.0.0 or ::0, get the valid
5557 * addresses from the global local address list.
5559 if (sctp_list_single_entry(&bp
->address_list
)) {
5560 addr
= list_entry(bp
->address_list
.next
,
5561 struct sctp_sockaddr_entry
, list
);
5562 if (sctp_is_any(sk
, &addr
->a
)) {
5563 cnt
= sctp_copy_laddrs(sk
, bp
->port
, addrs
,
5564 space_left
, &bytes_copied
);
5574 /* Protection on the bound address list is not needed since
5575 * in the socket option context we hold a socket lock and
5576 * thus the bound address list can't change.
5578 list_for_each_entry(addr
, &bp
->address_list
, list
) {
5579 memcpy(&temp
, &addr
->a
, sizeof(temp
));
5580 addrlen
= sctp_get_pf_specific(sk
->sk_family
)
5581 ->addr_to_user(sp
, &temp
);
5582 if (space_left
< addrlen
) {
5583 err
= -ENOMEM
; /*fixme: right error?*/
5586 memcpy(buf
, &temp
, addrlen
);
5588 bytes_copied
+= addrlen
;
5590 space_left
-= addrlen
;
5594 if (copy_to_user(to
, addrs
, bytes_copied
)) {
5598 if (put_user(cnt
, &((struct sctp_getaddrs __user
*)optval
)->addr_num
)) {
5602 /* XXX: We should have accounted for sizeof(struct sctp_getaddrs) too,
5603 * but we can't change it anymore.
5605 if (put_user(bytes_copied
, optlen
))
5612 /* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
5614 * Requests that the local SCTP stack use the enclosed peer address as
5615 * the association primary. The enclosed address must be one of the
5616 * association peer's addresses.
5618 static int sctp_getsockopt_primary_addr(struct sock
*sk
, int len
,
5619 char __user
*optval
, int __user
*optlen
)
5621 struct sctp_prim prim
;
5622 struct sctp_association
*asoc
;
5623 struct sctp_sock
*sp
= sctp_sk(sk
);
5625 if (len
< sizeof(struct sctp_prim
))
5628 len
= sizeof(struct sctp_prim
);
5630 if (copy_from_user(&prim
, optval
, len
))
5633 asoc
= sctp_id2assoc(sk
, prim
.ssp_assoc_id
);
5637 if (!asoc
->peer
.primary_path
)
5640 memcpy(&prim
.ssp_addr
, &asoc
->peer
.primary_path
->ipaddr
,
5641 asoc
->peer
.primary_path
->af_specific
->sockaddr_len
);
5643 sctp_get_pf_specific(sk
->sk_family
)->addr_to_user(sp
,
5644 (union sctp_addr
*)&prim
.ssp_addr
);
5646 if (put_user(len
, optlen
))
5648 if (copy_to_user(optval
, &prim
, len
))
5655 * 7.1.11 Set Adaptation Layer Indicator (SCTP_ADAPTATION_LAYER)
5657 * Requests that the local endpoint set the specified Adaptation Layer
5658 * Indication parameter for all future INIT and INIT-ACK exchanges.
5660 static int sctp_getsockopt_adaptation_layer(struct sock
*sk
, int len
,
5661 char __user
*optval
, int __user
*optlen
)
5663 struct sctp_setadaptation adaptation
;
5665 if (len
< sizeof(struct sctp_setadaptation
))
5668 len
= sizeof(struct sctp_setadaptation
);
5670 adaptation
.ssb_adaptation_ind
= sctp_sk(sk
)->adaptation_ind
;
5672 if (put_user(len
, optlen
))
5674 if (copy_to_user(optval
, &adaptation
, len
))
5682 * 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM)
5684 * Applications that wish to use the sendto() system call may wish to
5685 * specify a default set of parameters that would normally be supplied
5686 * through the inclusion of ancillary data. This socket option allows
5687 * such an application to set the default sctp_sndrcvinfo structure.
5690 * The application that wishes to use this socket option simply passes
5691 * in to this call the sctp_sndrcvinfo structure defined in Section
5692 * 5.2.2) The input parameters accepted by this call include
5693 * sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context,
5694 * sinfo_timetolive. The user must provide the sinfo_assoc_id field in
5695 * to this call if the caller is using the UDP model.
5697 * For getsockopt, it get the default sctp_sndrcvinfo structure.
5699 static int sctp_getsockopt_default_send_param(struct sock
*sk
,
5700 int len
, char __user
*optval
,
5703 struct sctp_sock
*sp
= sctp_sk(sk
);
5704 struct sctp_association
*asoc
;
5705 struct sctp_sndrcvinfo info
;
5707 if (len
< sizeof(info
))
5712 if (copy_from_user(&info
, optval
, len
))
5715 asoc
= sctp_id2assoc(sk
, info
.sinfo_assoc_id
);
5716 if (!asoc
&& info
.sinfo_assoc_id
&& sctp_style(sk
, UDP
))
5719 info
.sinfo_stream
= asoc
->default_stream
;
5720 info
.sinfo_flags
= asoc
->default_flags
;
5721 info
.sinfo_ppid
= asoc
->default_ppid
;
5722 info
.sinfo_context
= asoc
->default_context
;
5723 info
.sinfo_timetolive
= asoc
->default_timetolive
;
5725 info
.sinfo_stream
= sp
->default_stream
;
5726 info
.sinfo_flags
= sp
->default_flags
;
5727 info
.sinfo_ppid
= sp
->default_ppid
;
5728 info
.sinfo_context
= sp
->default_context
;
5729 info
.sinfo_timetolive
= sp
->default_timetolive
;
5732 if (put_user(len
, optlen
))
5734 if (copy_to_user(optval
, &info
, len
))
5740 /* RFC6458, Section 8.1.31. Set/get Default Send Parameters
5741 * (SCTP_DEFAULT_SNDINFO)
5743 static int sctp_getsockopt_default_sndinfo(struct sock
*sk
, int len
,
5744 char __user
*optval
,
5747 struct sctp_sock
*sp
= sctp_sk(sk
);
5748 struct sctp_association
*asoc
;
5749 struct sctp_sndinfo info
;
5751 if (len
< sizeof(info
))
5756 if (copy_from_user(&info
, optval
, len
))
5759 asoc
= sctp_id2assoc(sk
, info
.snd_assoc_id
);
5760 if (!asoc
&& info
.snd_assoc_id
&& sctp_style(sk
, UDP
))
5763 info
.snd_sid
= asoc
->default_stream
;
5764 info
.snd_flags
= asoc
->default_flags
;
5765 info
.snd_ppid
= asoc
->default_ppid
;
5766 info
.snd_context
= asoc
->default_context
;
5768 info
.snd_sid
= sp
->default_stream
;
5769 info
.snd_flags
= sp
->default_flags
;
5770 info
.snd_ppid
= sp
->default_ppid
;
5771 info
.snd_context
= sp
->default_context
;
5774 if (put_user(len
, optlen
))
5776 if (copy_to_user(optval
, &info
, len
))
5784 * 7.1.5 SCTP_NODELAY
5786 * Turn on/off any Nagle-like algorithm. This means that packets are
5787 * generally sent as soon as possible and no unnecessary delays are
5788 * introduced, at the cost of more packets in the network. Expects an
5789 * integer boolean flag.
5792 static int sctp_getsockopt_nodelay(struct sock
*sk
, int len
,
5793 char __user
*optval
, int __user
*optlen
)
5797 if (len
< sizeof(int))
5801 val
= (sctp_sk(sk
)->nodelay
== 1);
5802 if (put_user(len
, optlen
))
5804 if (copy_to_user(optval
, &val
, len
))
5811 * 7.1.1 SCTP_RTOINFO
5813 * The protocol parameters used to initialize and bound retransmission
5814 * timeout (RTO) are tunable. sctp_rtoinfo structure is used to access
5815 * and modify these parameters.
5816 * All parameters are time values, in milliseconds. A value of 0, when
5817 * modifying the parameters, indicates that the current value should not
5821 static int sctp_getsockopt_rtoinfo(struct sock
*sk
, int len
,
5822 char __user
*optval
,
5823 int __user
*optlen
) {
5824 struct sctp_rtoinfo rtoinfo
;
5825 struct sctp_association
*asoc
;
5827 if (len
< sizeof (struct sctp_rtoinfo
))
5830 len
= sizeof(struct sctp_rtoinfo
);
5832 if (copy_from_user(&rtoinfo
, optval
, len
))
5835 asoc
= sctp_id2assoc(sk
, rtoinfo
.srto_assoc_id
);
5837 if (!asoc
&& rtoinfo
.srto_assoc_id
&& sctp_style(sk
, UDP
))
5840 /* Values corresponding to the specific association. */
5842 rtoinfo
.srto_initial
= jiffies_to_msecs(asoc
->rto_initial
);
5843 rtoinfo
.srto_max
= jiffies_to_msecs(asoc
->rto_max
);
5844 rtoinfo
.srto_min
= jiffies_to_msecs(asoc
->rto_min
);
5846 /* Values corresponding to the endpoint. */
5847 struct sctp_sock
*sp
= sctp_sk(sk
);
5849 rtoinfo
.srto_initial
= sp
->rtoinfo
.srto_initial
;
5850 rtoinfo
.srto_max
= sp
->rtoinfo
.srto_max
;
5851 rtoinfo
.srto_min
= sp
->rtoinfo
.srto_min
;
5854 if (put_user(len
, optlen
))
5857 if (copy_to_user(optval
, &rtoinfo
, len
))
5865 * 7.1.2 SCTP_ASSOCINFO
5867 * This option is used to tune the maximum retransmission attempts
5868 * of the association.
5869 * Returns an error if the new association retransmission value is
5870 * greater than the sum of the retransmission value of the peer.
5871 * See [SCTP] for more information.
5874 static int sctp_getsockopt_associnfo(struct sock
*sk
, int len
,
5875 char __user
*optval
,
5879 struct sctp_assocparams assocparams
;
5880 struct sctp_association
*asoc
;
5881 struct list_head
*pos
;
5884 if (len
< sizeof (struct sctp_assocparams
))
5887 len
= sizeof(struct sctp_assocparams
);
5889 if (copy_from_user(&assocparams
, optval
, len
))
5892 asoc
= sctp_id2assoc(sk
, assocparams
.sasoc_assoc_id
);
5894 if (!asoc
&& assocparams
.sasoc_assoc_id
&& sctp_style(sk
, UDP
))
5897 /* Values correspoinding to the specific association */
5899 assocparams
.sasoc_asocmaxrxt
= asoc
->max_retrans
;
5900 assocparams
.sasoc_peer_rwnd
= asoc
->peer
.rwnd
;
5901 assocparams
.sasoc_local_rwnd
= asoc
->a_rwnd
;
5902 assocparams
.sasoc_cookie_life
= ktime_to_ms(asoc
->cookie_life
);
5904 list_for_each(pos
, &asoc
->peer
.transport_addr_list
) {
5908 assocparams
.sasoc_number_peer_destinations
= cnt
;
5910 /* Values corresponding to the endpoint */
5911 struct sctp_sock
*sp
= sctp_sk(sk
);
5913 assocparams
.sasoc_asocmaxrxt
= sp
->assocparams
.sasoc_asocmaxrxt
;
5914 assocparams
.sasoc_peer_rwnd
= sp
->assocparams
.sasoc_peer_rwnd
;
5915 assocparams
.sasoc_local_rwnd
= sp
->assocparams
.sasoc_local_rwnd
;
5916 assocparams
.sasoc_cookie_life
=
5917 sp
->assocparams
.sasoc_cookie_life
;
5918 assocparams
.sasoc_number_peer_destinations
=
5920 sasoc_number_peer_destinations
;
5923 if (put_user(len
, optlen
))
5926 if (copy_to_user(optval
, &assocparams
, len
))
5933 * 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR)
5935 * This socket option is a boolean flag which turns on or off mapped V4
5936 * addresses. If this option is turned on and the socket is type
5937 * PF_INET6, then IPv4 addresses will be mapped to V6 representation.
5938 * If this option is turned off, then no mapping will be done of V4
5939 * addresses and a user will receive both PF_INET6 and PF_INET type
5940 * addresses on the socket.
5942 static int sctp_getsockopt_mappedv4(struct sock
*sk
, int len
,
5943 char __user
*optval
, int __user
*optlen
)
5946 struct sctp_sock
*sp
= sctp_sk(sk
);
5948 if (len
< sizeof(int))
5953 if (put_user(len
, optlen
))
5955 if (copy_to_user(optval
, &val
, len
))
5962 * 7.1.29. Set or Get the default context (SCTP_CONTEXT)
5963 * (chapter and verse is quoted at sctp_setsockopt_context())
5965 static int sctp_getsockopt_context(struct sock
*sk
, int len
,
5966 char __user
*optval
, int __user
*optlen
)
5968 struct sctp_assoc_value params
;
5969 struct sctp_sock
*sp
;
5970 struct sctp_association
*asoc
;
5972 if (len
< sizeof(struct sctp_assoc_value
))
5975 len
= sizeof(struct sctp_assoc_value
);
5977 if (copy_from_user(¶ms
, optval
, len
))
5982 if (params
.assoc_id
!= 0) {
5983 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
5986 params
.assoc_value
= asoc
->default_rcv_context
;
5988 params
.assoc_value
= sp
->default_rcv_context
;
5991 if (put_user(len
, optlen
))
5993 if (copy_to_user(optval
, ¶ms
, len
))
6000 * 8.1.16. Get or Set the Maximum Fragmentation Size (SCTP_MAXSEG)
6001 * This option will get or set the maximum size to put in any outgoing
6002 * SCTP DATA chunk. If a message is larger than this size it will be
6003 * fragmented by SCTP into the specified size. Note that the underlying
6004 * SCTP implementation may fragment into smaller sized chunks when the
6005 * PMTU of the underlying association is smaller than the value set by
6006 * the user. The default value for this option is '0' which indicates
6007 * the user is NOT limiting fragmentation and only the PMTU will effect
6008 * SCTP's choice of DATA chunk size. Note also that values set larger
6009 * than the maximum size of an IP datagram will effectively let SCTP
6010 * control fragmentation (i.e. the same as setting this option to 0).
6012 * The following structure is used to access and modify this parameter:
6014 * struct sctp_assoc_value {
6015 * sctp_assoc_t assoc_id;
6016 * uint32_t assoc_value;
6019 * assoc_id: This parameter is ignored for one-to-one style sockets.
6020 * For one-to-many style sockets this parameter indicates which
6021 * association the user is performing an action upon. Note that if
6022 * this field's value is zero then the endpoints default value is
6023 * changed (effecting future associations only).
6024 * assoc_value: This parameter specifies the maximum size in bytes.
6026 static int sctp_getsockopt_maxseg(struct sock
*sk
, int len
,
6027 char __user
*optval
, int __user
*optlen
)
6029 struct sctp_assoc_value params
;
6030 struct sctp_association
*asoc
;
6032 if (len
== sizeof(int)) {
6033 pr_warn_ratelimited(DEPRECATED
6035 "Use of int in maxseg socket option.\n"
6036 "Use struct sctp_assoc_value instead\n",
6037 current
->comm
, task_pid_nr(current
));
6038 params
.assoc_id
= 0;
6039 } else if (len
>= sizeof(struct sctp_assoc_value
)) {
6040 len
= sizeof(struct sctp_assoc_value
);
6041 if (copy_from_user(¶ms
, optval
, len
))
6046 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
6047 if (!asoc
&& params
.assoc_id
&& sctp_style(sk
, UDP
))
6051 params
.assoc_value
= asoc
->frag_point
;
6053 params
.assoc_value
= sctp_sk(sk
)->user_frag
;
6055 if (put_user(len
, optlen
))
6057 if (len
== sizeof(int)) {
6058 if (copy_to_user(optval
, ¶ms
.assoc_value
, len
))
6061 if (copy_to_user(optval
, ¶ms
, len
))
6069 * 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE)
6070 * (chapter and verse is quoted at sctp_setsockopt_fragment_interleave())
6072 static int sctp_getsockopt_fragment_interleave(struct sock
*sk
, int len
,
6073 char __user
*optval
, int __user
*optlen
)
6077 if (len
< sizeof(int))
6082 val
= sctp_sk(sk
)->frag_interleave
;
6083 if (put_user(len
, optlen
))
6085 if (copy_to_user(optval
, &val
, len
))
6092 * 7.1.25. Set or Get the sctp partial delivery point
6093 * (chapter and verse is quoted at sctp_setsockopt_partial_delivery_point())
6095 static int sctp_getsockopt_partial_delivery_point(struct sock
*sk
, int len
,
6096 char __user
*optval
,
6101 if (len
< sizeof(u32
))
6106 val
= sctp_sk(sk
)->pd_point
;
6107 if (put_user(len
, optlen
))
6109 if (copy_to_user(optval
, &val
, len
))
6116 * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST)
6117 * (chapter and verse is quoted at sctp_setsockopt_maxburst())
6119 static int sctp_getsockopt_maxburst(struct sock
*sk
, int len
,
6120 char __user
*optval
,
6123 struct sctp_assoc_value params
;
6124 struct sctp_sock
*sp
;
6125 struct sctp_association
*asoc
;
6127 if (len
== sizeof(int)) {
6128 pr_warn_ratelimited(DEPRECATED
6130 "Use of int in max_burst socket option.\n"
6131 "Use struct sctp_assoc_value instead\n",
6132 current
->comm
, task_pid_nr(current
));
6133 params
.assoc_id
= 0;
6134 } else if (len
>= sizeof(struct sctp_assoc_value
)) {
6135 len
= sizeof(struct sctp_assoc_value
);
6136 if (copy_from_user(¶ms
, optval
, len
))
6143 if (params
.assoc_id
!= 0) {
6144 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
6147 params
.assoc_value
= asoc
->max_burst
;
6149 params
.assoc_value
= sp
->max_burst
;
6151 if (len
== sizeof(int)) {
6152 if (copy_to_user(optval
, ¶ms
.assoc_value
, len
))
6155 if (copy_to_user(optval
, ¶ms
, len
))
6163 static int sctp_getsockopt_hmac_ident(struct sock
*sk
, int len
,
6164 char __user
*optval
, int __user
*optlen
)
6166 struct sctp_endpoint
*ep
= sctp_sk(sk
)->ep
;
6167 struct sctp_hmacalgo __user
*p
= (void __user
*)optval
;
6168 struct sctp_hmac_algo_param
*hmacs
;
6173 if (!ep
->auth_enable
)
6176 hmacs
= ep
->auth_hmacs_list
;
6177 data_len
= ntohs(hmacs
->param_hdr
.length
) -
6178 sizeof(struct sctp_paramhdr
);
6180 if (len
< sizeof(struct sctp_hmacalgo
) + data_len
)
6183 len
= sizeof(struct sctp_hmacalgo
) + data_len
;
6184 num_idents
= data_len
/ sizeof(u16
);
6186 if (put_user(len
, optlen
))
6188 if (put_user(num_idents
, &p
->shmac_num_idents
))
6190 for (i
= 0; i
< num_idents
; i
++) {
6191 __u16 hmacid
= ntohs(hmacs
->hmac_ids
[i
]);
6193 if (copy_to_user(&p
->shmac_idents
[i
], &hmacid
, sizeof(__u16
)))
6199 static int sctp_getsockopt_active_key(struct sock
*sk
, int len
,
6200 char __user
*optval
, int __user
*optlen
)
6202 struct sctp_endpoint
*ep
= sctp_sk(sk
)->ep
;
6203 struct sctp_authkeyid val
;
6204 struct sctp_association
*asoc
;
6206 if (!ep
->auth_enable
)
6209 if (len
< sizeof(struct sctp_authkeyid
))
6212 len
= sizeof(struct sctp_authkeyid
);
6213 if (copy_from_user(&val
, optval
, len
))
6216 asoc
= sctp_id2assoc(sk
, val
.scact_assoc_id
);
6217 if (!asoc
&& val
.scact_assoc_id
&& sctp_style(sk
, UDP
))
6221 val
.scact_keynumber
= asoc
->active_key_id
;
6223 val
.scact_keynumber
= ep
->active_key_id
;
6225 if (put_user(len
, optlen
))
6227 if (copy_to_user(optval
, &val
, len
))
6233 static int sctp_getsockopt_peer_auth_chunks(struct sock
*sk
, int len
,
6234 char __user
*optval
, int __user
*optlen
)
6236 struct sctp_endpoint
*ep
= sctp_sk(sk
)->ep
;
6237 struct sctp_authchunks __user
*p
= (void __user
*)optval
;
6238 struct sctp_authchunks val
;
6239 struct sctp_association
*asoc
;
6240 struct sctp_chunks_param
*ch
;
6244 if (!ep
->auth_enable
)
6247 if (len
< sizeof(struct sctp_authchunks
))
6250 if (copy_from_user(&val
, optval
, sizeof(val
)))
6253 to
= p
->gauth_chunks
;
6254 asoc
= sctp_id2assoc(sk
, val
.gauth_assoc_id
);
6258 ch
= asoc
->peer
.peer_chunks
;
6262 /* See if the user provided enough room for all the data */
6263 num_chunks
= ntohs(ch
->param_hdr
.length
) - sizeof(struct sctp_paramhdr
);
6264 if (len
< num_chunks
)
6267 if (copy_to_user(to
, ch
->chunks
, num_chunks
))
6270 len
= sizeof(struct sctp_authchunks
) + num_chunks
;
6271 if (put_user(len
, optlen
))
6273 if (put_user(num_chunks
, &p
->gauth_number_of_chunks
))
6278 static int sctp_getsockopt_local_auth_chunks(struct sock
*sk
, int len
,
6279 char __user
*optval
, int __user
*optlen
)
6281 struct sctp_endpoint
*ep
= sctp_sk(sk
)->ep
;
6282 struct sctp_authchunks __user
*p
= (void __user
*)optval
;
6283 struct sctp_authchunks val
;
6284 struct sctp_association
*asoc
;
6285 struct sctp_chunks_param
*ch
;
6289 if (!ep
->auth_enable
)
6292 if (len
< sizeof(struct sctp_authchunks
))
6295 if (copy_from_user(&val
, optval
, sizeof(val
)))
6298 to
= p
->gauth_chunks
;
6299 asoc
= sctp_id2assoc(sk
, val
.gauth_assoc_id
);
6300 if (!asoc
&& val
.gauth_assoc_id
&& sctp_style(sk
, UDP
))
6304 ch
= (struct sctp_chunks_param
*)asoc
->c
.auth_chunks
;
6306 ch
= ep
->auth_chunk_list
;
6311 num_chunks
= ntohs(ch
->param_hdr
.length
) - sizeof(struct sctp_paramhdr
);
6312 if (len
< sizeof(struct sctp_authchunks
) + num_chunks
)
6315 if (copy_to_user(to
, ch
->chunks
, num_chunks
))
6318 len
= sizeof(struct sctp_authchunks
) + num_chunks
;
6319 if (put_user(len
, optlen
))
6321 if (put_user(num_chunks
, &p
->gauth_number_of_chunks
))
6328 * 8.2.5. Get the Current Number of Associations (SCTP_GET_ASSOC_NUMBER)
6329 * This option gets the current number of associations that are attached
6330 * to a one-to-many style socket. The option value is an uint32_t.
6332 static int sctp_getsockopt_assoc_number(struct sock
*sk
, int len
,
6333 char __user
*optval
, int __user
*optlen
)
6335 struct sctp_sock
*sp
= sctp_sk(sk
);
6336 struct sctp_association
*asoc
;
6339 if (sctp_style(sk
, TCP
))
6342 if (len
< sizeof(u32
))
6347 list_for_each_entry(asoc
, &(sp
->ep
->asocs
), asocs
) {
6351 if (put_user(len
, optlen
))
6353 if (copy_to_user(optval
, &val
, len
))
6360 * 8.1.23 SCTP_AUTO_ASCONF
6361 * See the corresponding setsockopt entry as description
6363 static int sctp_getsockopt_auto_asconf(struct sock
*sk
, int len
,
6364 char __user
*optval
, int __user
*optlen
)
6368 if (len
< sizeof(int))
6372 if (sctp_sk(sk
)->do_auto_asconf
&& sctp_is_ep_boundall(sk
))
6374 if (put_user(len
, optlen
))
6376 if (copy_to_user(optval
, &val
, len
))
6382 * 8.2.6. Get the Current Identifiers of Associations
6383 * (SCTP_GET_ASSOC_ID_LIST)
6385 * This option gets the current list of SCTP association identifiers of
6386 * the SCTP associations handled by a one-to-many style socket.
6388 static int sctp_getsockopt_assoc_ids(struct sock
*sk
, int len
,
6389 char __user
*optval
, int __user
*optlen
)
6391 struct sctp_sock
*sp
= sctp_sk(sk
);
6392 struct sctp_association
*asoc
;
6393 struct sctp_assoc_ids
*ids
;
6396 if (sctp_style(sk
, TCP
))
6399 if (len
< sizeof(struct sctp_assoc_ids
))
6402 list_for_each_entry(asoc
, &(sp
->ep
->asocs
), asocs
) {
6406 if (len
< sizeof(struct sctp_assoc_ids
) + sizeof(sctp_assoc_t
) * num
)
6409 len
= sizeof(struct sctp_assoc_ids
) + sizeof(sctp_assoc_t
) * num
;
6411 ids
= kmalloc(len
, GFP_USER
| __GFP_NOWARN
);
6415 ids
->gaids_number_of_ids
= num
;
6417 list_for_each_entry(asoc
, &(sp
->ep
->asocs
), asocs
) {
6418 ids
->gaids_assoc_id
[num
++] = asoc
->assoc_id
;
6421 if (put_user(len
, optlen
) || copy_to_user(optval
, ids
, len
)) {
6431 * SCTP_PEER_ADDR_THLDS
6433 * This option allows us to fetch the partially failed threshold for one or all
6434 * transports in an association. See Section 6.1 of:
6435 * http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txt
6437 static int sctp_getsockopt_paddr_thresholds(struct sock
*sk
,
6438 char __user
*optval
,
6442 struct sctp_paddrthlds val
;
6443 struct sctp_transport
*trans
;
6444 struct sctp_association
*asoc
;
6446 if (len
< sizeof(struct sctp_paddrthlds
))
6448 len
= sizeof(struct sctp_paddrthlds
);
6449 if (copy_from_user(&val
, (struct sctp_paddrthlds __user
*)optval
, len
))
6452 if (sctp_is_any(sk
, (const union sctp_addr
*)&val
.spt_address
)) {
6453 asoc
= sctp_id2assoc(sk
, val
.spt_assoc_id
);
6457 val
.spt_pathpfthld
= asoc
->pf_retrans
;
6458 val
.spt_pathmaxrxt
= asoc
->pathmaxrxt
;
6460 trans
= sctp_addr_id2transport(sk
, &val
.spt_address
,
6465 val
.spt_pathmaxrxt
= trans
->pathmaxrxt
;
6466 val
.spt_pathpfthld
= trans
->pf_retrans
;
6469 if (put_user(len
, optlen
) || copy_to_user(optval
, &val
, len
))
6476 * SCTP_GET_ASSOC_STATS
6478 * This option retrieves local per endpoint statistics. It is modeled
6479 * after OpenSolaris' implementation
6481 static int sctp_getsockopt_assoc_stats(struct sock
*sk
, int len
,
6482 char __user
*optval
,
6485 struct sctp_assoc_stats sas
;
6486 struct sctp_association
*asoc
= NULL
;
6488 /* User must provide at least the assoc id */
6489 if (len
< sizeof(sctp_assoc_t
))
6492 /* Allow the struct to grow and fill in as much as possible */
6493 len
= min_t(size_t, len
, sizeof(sas
));
6495 if (copy_from_user(&sas
, optval
, len
))
6498 asoc
= sctp_id2assoc(sk
, sas
.sas_assoc_id
);
6502 sas
.sas_rtxchunks
= asoc
->stats
.rtxchunks
;
6503 sas
.sas_gapcnt
= asoc
->stats
.gapcnt
;
6504 sas
.sas_outofseqtsns
= asoc
->stats
.outofseqtsns
;
6505 sas
.sas_osacks
= asoc
->stats
.osacks
;
6506 sas
.sas_isacks
= asoc
->stats
.isacks
;
6507 sas
.sas_octrlchunks
= asoc
->stats
.octrlchunks
;
6508 sas
.sas_ictrlchunks
= asoc
->stats
.ictrlchunks
;
6509 sas
.sas_oodchunks
= asoc
->stats
.oodchunks
;
6510 sas
.sas_iodchunks
= asoc
->stats
.iodchunks
;
6511 sas
.sas_ouodchunks
= asoc
->stats
.ouodchunks
;
6512 sas
.sas_iuodchunks
= asoc
->stats
.iuodchunks
;
6513 sas
.sas_idupchunks
= asoc
->stats
.idupchunks
;
6514 sas
.sas_opackets
= asoc
->stats
.opackets
;
6515 sas
.sas_ipackets
= asoc
->stats
.ipackets
;
6517 /* New high max rto observed, will return 0 if not a single
6518 * RTO update took place. obs_rto_ipaddr will be bogus
6521 sas
.sas_maxrto
= asoc
->stats
.max_obs_rto
;
6522 memcpy(&sas
.sas_obs_rto_ipaddr
, &asoc
->stats
.obs_rto_ipaddr
,
6523 sizeof(struct sockaddr_storage
));
6525 /* Mark beginning of a new observation period */
6526 asoc
->stats
.max_obs_rto
= asoc
->rto_min
;
6528 if (put_user(len
, optlen
))
6531 pr_debug("%s: len:%d, assoc_id:%d\n", __func__
, len
, sas
.sas_assoc_id
);
6533 if (copy_to_user(optval
, &sas
, len
))
6539 static int sctp_getsockopt_recvrcvinfo(struct sock
*sk
, int len
,
6540 char __user
*optval
,
6545 if (len
< sizeof(int))
6549 if (sctp_sk(sk
)->recvrcvinfo
)
6551 if (put_user(len
, optlen
))
6553 if (copy_to_user(optval
, &val
, len
))
6559 static int sctp_getsockopt_recvnxtinfo(struct sock
*sk
, int len
,
6560 char __user
*optval
,
6565 if (len
< sizeof(int))
6569 if (sctp_sk(sk
)->recvnxtinfo
)
6571 if (put_user(len
, optlen
))
6573 if (copy_to_user(optval
, &val
, len
))
6579 static int sctp_getsockopt_pr_supported(struct sock
*sk
, int len
,
6580 char __user
*optval
,
6583 struct sctp_assoc_value params
;
6584 struct sctp_association
*asoc
;
6585 int retval
= -EFAULT
;
6587 if (len
< sizeof(params
)) {
6592 len
= sizeof(params
);
6593 if (copy_from_user(¶ms
, optval
, len
))
6596 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
6598 params
.assoc_value
= asoc
->prsctp_enable
;
6599 } else if (!params
.assoc_id
) {
6600 struct sctp_sock
*sp
= sctp_sk(sk
);
6602 params
.assoc_value
= sp
->ep
->prsctp_enable
;
6608 if (put_user(len
, optlen
))
6611 if (copy_to_user(optval
, ¶ms
, len
))
6620 static int sctp_getsockopt_default_prinfo(struct sock
*sk
, int len
,
6621 char __user
*optval
,
6624 struct sctp_default_prinfo info
;
6625 struct sctp_association
*asoc
;
6626 int retval
= -EFAULT
;
6628 if (len
< sizeof(info
)) {
6634 if (copy_from_user(&info
, optval
, len
))
6637 asoc
= sctp_id2assoc(sk
, info
.pr_assoc_id
);
6639 info
.pr_policy
= SCTP_PR_POLICY(asoc
->default_flags
);
6640 info
.pr_value
= asoc
->default_timetolive
;
6641 } else if (!info
.pr_assoc_id
) {
6642 struct sctp_sock
*sp
= sctp_sk(sk
);
6644 info
.pr_policy
= SCTP_PR_POLICY(sp
->default_flags
);
6645 info
.pr_value
= sp
->default_timetolive
;
6651 if (put_user(len
, optlen
))
6654 if (copy_to_user(optval
, &info
, len
))
6663 static int sctp_getsockopt_pr_assocstatus(struct sock
*sk
, int len
,
6664 char __user
*optval
,
6667 struct sctp_prstatus params
;
6668 struct sctp_association
*asoc
;
6670 int retval
= -EINVAL
;
6672 if (len
< sizeof(params
))
6675 len
= sizeof(params
);
6676 if (copy_from_user(¶ms
, optval
, len
)) {
6681 policy
= params
.sprstat_policy
;
6682 if (policy
& ~SCTP_PR_SCTP_MASK
)
6685 asoc
= sctp_id2assoc(sk
, params
.sprstat_assoc_id
);
6689 if (policy
== SCTP_PR_SCTP_NONE
) {
6690 params
.sprstat_abandoned_unsent
= 0;
6691 params
.sprstat_abandoned_sent
= 0;
6692 for (policy
= 0; policy
<= SCTP_PR_INDEX(MAX
); policy
++) {
6693 params
.sprstat_abandoned_unsent
+=
6694 asoc
->abandoned_unsent
[policy
];
6695 params
.sprstat_abandoned_sent
+=
6696 asoc
->abandoned_sent
[policy
];
6699 params
.sprstat_abandoned_unsent
=
6700 asoc
->abandoned_unsent
[__SCTP_PR_INDEX(policy
)];
6701 params
.sprstat_abandoned_sent
=
6702 asoc
->abandoned_sent
[__SCTP_PR_INDEX(policy
)];
6705 if (put_user(len
, optlen
)) {
6710 if (copy_to_user(optval
, ¶ms
, len
)) {
6721 static int sctp_getsockopt_pr_streamstatus(struct sock
*sk
, int len
,
6722 char __user
*optval
,
6725 struct sctp_stream_out
*streamout
;
6726 struct sctp_association
*asoc
;
6727 struct sctp_prstatus params
;
6728 int retval
= -EINVAL
;
6731 if (len
< sizeof(params
))
6734 len
= sizeof(params
);
6735 if (copy_from_user(¶ms
, optval
, len
)) {
6740 policy
= params
.sprstat_policy
;
6741 if (policy
& ~SCTP_PR_SCTP_MASK
)
6744 asoc
= sctp_id2assoc(sk
, params
.sprstat_assoc_id
);
6745 if (!asoc
|| params
.sprstat_sid
>= asoc
->stream
.outcnt
)
6748 streamout
= &asoc
->stream
.out
[params
.sprstat_sid
];
6749 if (policy
== SCTP_PR_SCTP_NONE
) {
6750 params
.sprstat_abandoned_unsent
= 0;
6751 params
.sprstat_abandoned_sent
= 0;
6752 for (policy
= 0; policy
<= SCTP_PR_INDEX(MAX
); policy
++) {
6753 params
.sprstat_abandoned_unsent
+=
6754 streamout
->abandoned_unsent
[policy
];
6755 params
.sprstat_abandoned_sent
+=
6756 streamout
->abandoned_sent
[policy
];
6759 params
.sprstat_abandoned_unsent
=
6760 streamout
->abandoned_unsent
[__SCTP_PR_INDEX(policy
)];
6761 params
.sprstat_abandoned_sent
=
6762 streamout
->abandoned_sent
[__SCTP_PR_INDEX(policy
)];
6765 if (put_user(len
, optlen
) || copy_to_user(optval
, ¶ms
, len
)) {
6776 static int sctp_getsockopt_reconfig_supported(struct sock
*sk
, int len
,
6777 char __user
*optval
,
6780 struct sctp_assoc_value params
;
6781 struct sctp_association
*asoc
;
6782 int retval
= -EFAULT
;
6784 if (len
< sizeof(params
)) {
6789 len
= sizeof(params
);
6790 if (copy_from_user(¶ms
, optval
, len
))
6793 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
6795 params
.assoc_value
= asoc
->reconf_enable
;
6796 } else if (!params
.assoc_id
) {
6797 struct sctp_sock
*sp
= sctp_sk(sk
);
6799 params
.assoc_value
= sp
->ep
->reconf_enable
;
6805 if (put_user(len
, optlen
))
6808 if (copy_to_user(optval
, ¶ms
, len
))
6817 static int sctp_getsockopt_enable_strreset(struct sock
*sk
, int len
,
6818 char __user
*optval
,
6821 struct sctp_assoc_value params
;
6822 struct sctp_association
*asoc
;
6823 int retval
= -EFAULT
;
6825 if (len
< sizeof(params
)) {
6830 len
= sizeof(params
);
6831 if (copy_from_user(¶ms
, optval
, len
))
6834 asoc
= sctp_id2assoc(sk
, params
.assoc_id
);
6836 params
.assoc_value
= asoc
->strreset_enable
;
6837 } else if (!params
.assoc_id
) {
6838 struct sctp_sock
*sp
= sctp_sk(sk
);
6840 params
.assoc_value
= sp
->ep
->strreset_enable
;
6846 if (put_user(len
, optlen
))
6849 if (copy_to_user(optval
, ¶ms
, len
))
6858 static int sctp_getsockopt(struct sock
*sk
, int level
, int optname
,
6859 char __user
*optval
, int __user
*optlen
)
6864 pr_debug("%s: sk:%p, optname:%d\n", __func__
, sk
, optname
);
6866 /* I can hardly begin to describe how wrong this is. This is
6867 * so broken as to be worse than useless. The API draft
6868 * REALLY is NOT helpful here... I am not convinced that the
6869 * semantics of getsockopt() with a level OTHER THAN SOL_SCTP
6870 * are at all well-founded.
6872 if (level
!= SOL_SCTP
) {
6873 struct sctp_af
*af
= sctp_sk(sk
)->pf
->af
;
6875 retval
= af
->getsockopt(sk
, level
, optname
, optval
, optlen
);
6879 if (get_user(len
, optlen
))
6889 retval
= sctp_getsockopt_sctp_status(sk
, len
, optval
, optlen
);
6891 case SCTP_DISABLE_FRAGMENTS
:
6892 retval
= sctp_getsockopt_disable_fragments(sk
, len
, optval
,
6896 retval
= sctp_getsockopt_events(sk
, len
, optval
, optlen
);
6898 case SCTP_AUTOCLOSE
:
6899 retval
= sctp_getsockopt_autoclose(sk
, len
, optval
, optlen
);
6901 case SCTP_SOCKOPT_PEELOFF
:
6902 retval
= sctp_getsockopt_peeloff(sk
, len
, optval
, optlen
);
6904 case SCTP_SOCKOPT_PEELOFF_FLAGS
:
6905 retval
= sctp_getsockopt_peeloff_flags(sk
, len
, optval
, optlen
);
6907 case SCTP_PEER_ADDR_PARAMS
:
6908 retval
= sctp_getsockopt_peer_addr_params(sk
, len
, optval
,
6911 case SCTP_DELAYED_SACK
:
6912 retval
= sctp_getsockopt_delayed_ack(sk
, len
, optval
,
6916 retval
= sctp_getsockopt_initmsg(sk
, len
, optval
, optlen
);
6918 case SCTP_GET_PEER_ADDRS
:
6919 retval
= sctp_getsockopt_peer_addrs(sk
, len
, optval
,
6922 case SCTP_GET_LOCAL_ADDRS
:
6923 retval
= sctp_getsockopt_local_addrs(sk
, len
, optval
,
6926 case SCTP_SOCKOPT_CONNECTX3
:
6927 retval
= sctp_getsockopt_connectx3(sk
, len
, optval
, optlen
);
6929 case SCTP_DEFAULT_SEND_PARAM
:
6930 retval
= sctp_getsockopt_default_send_param(sk
, len
,
6933 case SCTP_DEFAULT_SNDINFO
:
6934 retval
= sctp_getsockopt_default_sndinfo(sk
, len
,
6937 case SCTP_PRIMARY_ADDR
:
6938 retval
= sctp_getsockopt_primary_addr(sk
, len
, optval
, optlen
);
6941 retval
= sctp_getsockopt_nodelay(sk
, len
, optval
, optlen
);
6944 retval
= sctp_getsockopt_rtoinfo(sk
, len
, optval
, optlen
);
6946 case SCTP_ASSOCINFO
:
6947 retval
= sctp_getsockopt_associnfo(sk
, len
, optval
, optlen
);
6949 case SCTP_I_WANT_MAPPED_V4_ADDR
:
6950 retval
= sctp_getsockopt_mappedv4(sk
, len
, optval
, optlen
);
6953 retval
= sctp_getsockopt_maxseg(sk
, len
, optval
, optlen
);
6955 case SCTP_GET_PEER_ADDR_INFO
:
6956 retval
= sctp_getsockopt_peer_addr_info(sk
, len
, optval
,
6959 case SCTP_ADAPTATION_LAYER
:
6960 retval
= sctp_getsockopt_adaptation_layer(sk
, len
, optval
,
6964 retval
= sctp_getsockopt_context(sk
, len
, optval
, optlen
);
6966 case SCTP_FRAGMENT_INTERLEAVE
:
6967 retval
= sctp_getsockopt_fragment_interleave(sk
, len
, optval
,
6970 case SCTP_PARTIAL_DELIVERY_POINT
:
6971 retval
= sctp_getsockopt_partial_delivery_point(sk
, len
, optval
,
6974 case SCTP_MAX_BURST
:
6975 retval
= sctp_getsockopt_maxburst(sk
, len
, optval
, optlen
);
6978 case SCTP_AUTH_CHUNK
:
6979 case SCTP_AUTH_DELETE_KEY
:
6980 retval
= -EOPNOTSUPP
;
6982 case SCTP_HMAC_IDENT
:
6983 retval
= sctp_getsockopt_hmac_ident(sk
, len
, optval
, optlen
);
6985 case SCTP_AUTH_ACTIVE_KEY
:
6986 retval
= sctp_getsockopt_active_key(sk
, len
, optval
, optlen
);
6988 case SCTP_PEER_AUTH_CHUNKS
:
6989 retval
= sctp_getsockopt_peer_auth_chunks(sk
, len
, optval
,
6992 case SCTP_LOCAL_AUTH_CHUNKS
:
6993 retval
= sctp_getsockopt_local_auth_chunks(sk
, len
, optval
,
6996 case SCTP_GET_ASSOC_NUMBER
:
6997 retval
= sctp_getsockopt_assoc_number(sk
, len
, optval
, optlen
);
6999 case SCTP_GET_ASSOC_ID_LIST
:
7000 retval
= sctp_getsockopt_assoc_ids(sk
, len
, optval
, optlen
);
7002 case SCTP_AUTO_ASCONF
:
7003 retval
= sctp_getsockopt_auto_asconf(sk
, len
, optval
, optlen
);
7005 case SCTP_PEER_ADDR_THLDS
:
7006 retval
= sctp_getsockopt_paddr_thresholds(sk
, optval
, len
, optlen
);
7008 case SCTP_GET_ASSOC_STATS
:
7009 retval
= sctp_getsockopt_assoc_stats(sk
, len
, optval
, optlen
);
7011 case SCTP_RECVRCVINFO
:
7012 retval
= sctp_getsockopt_recvrcvinfo(sk
, len
, optval
, optlen
);
7014 case SCTP_RECVNXTINFO
:
7015 retval
= sctp_getsockopt_recvnxtinfo(sk
, len
, optval
, optlen
);
7017 case SCTP_PR_SUPPORTED
:
7018 retval
= sctp_getsockopt_pr_supported(sk
, len
, optval
, optlen
);
7020 case SCTP_DEFAULT_PRINFO
:
7021 retval
= sctp_getsockopt_default_prinfo(sk
, len
, optval
,
7024 case SCTP_PR_ASSOC_STATUS
:
7025 retval
= sctp_getsockopt_pr_assocstatus(sk
, len
, optval
,
7028 case SCTP_PR_STREAM_STATUS
:
7029 retval
= sctp_getsockopt_pr_streamstatus(sk
, len
, optval
,
7032 case SCTP_RECONFIG_SUPPORTED
:
7033 retval
= sctp_getsockopt_reconfig_supported(sk
, len
, optval
,
7036 case SCTP_ENABLE_STREAM_RESET
:
7037 retval
= sctp_getsockopt_enable_strreset(sk
, len
, optval
,
7041 retval
= -ENOPROTOOPT
;
7049 static int sctp_hash(struct sock
*sk
)
7055 static void sctp_unhash(struct sock
*sk
)
7060 /* Check if port is acceptable. Possibly find first available port.
7062 * The port hash table (contained in the 'global' SCTP protocol storage
7063 * returned by struct sctp_protocol *sctp_get_protocol()). The hash
7064 * table is an array of 4096 lists (sctp_bind_hashbucket). Each
7065 * list (the list number is the port number hashed out, so as you
7066 * would expect from a hash function, all the ports in a given list have
7067 * such a number that hashes out to the same list number; you were
7068 * expecting that, right?); so each list has a set of ports, with a
7069 * link to the socket (struct sock) that uses it, the port number and
7070 * a fastreuse flag (FIXME: NPI ipg).
7072 static struct sctp_bind_bucket
*sctp_bucket_create(
7073 struct sctp_bind_hashbucket
*head
, struct net
*, unsigned short snum
);
7075 static long sctp_get_port_local(struct sock
*sk
, union sctp_addr
*addr
)
7077 struct sctp_bind_hashbucket
*head
; /* hash list */
7078 struct sctp_bind_bucket
*pp
;
7079 unsigned short snum
;
7082 snum
= ntohs(addr
->v4
.sin_port
);
7084 pr_debug("%s: begins, snum:%d\n", __func__
, snum
);
7089 /* Search for an available port. */
7090 int low
, high
, remaining
, index
;
7092 struct net
*net
= sock_net(sk
);
7094 inet_get_local_port_range(net
, &low
, &high
);
7095 remaining
= (high
- low
) + 1;
7096 rover
= prandom_u32() % remaining
+ low
;
7100 if ((rover
< low
) || (rover
> high
))
7102 if (inet_is_local_reserved_port(net
, rover
))
7104 index
= sctp_phashfn(sock_net(sk
), rover
);
7105 head
= &sctp_port_hashtable
[index
];
7106 spin_lock(&head
->lock
);
7107 sctp_for_each_hentry(pp
, &head
->chain
)
7108 if ((pp
->port
== rover
) &&
7109 net_eq(sock_net(sk
), pp
->net
))
7113 spin_unlock(&head
->lock
);
7114 } while (--remaining
> 0);
7116 /* Exhausted local port range during search? */
7121 /* OK, here is the one we will use. HEAD (the port
7122 * hash table list entry) is non-NULL and we hold it's
7127 /* We are given an specific port number; we verify
7128 * that it is not being used. If it is used, we will
7129 * exahust the search in the hash list corresponding
7130 * to the port number (snum) - we detect that with the
7131 * port iterator, pp being NULL.
7133 head
= &sctp_port_hashtable
[sctp_phashfn(sock_net(sk
), snum
)];
7134 spin_lock(&head
->lock
);
7135 sctp_for_each_hentry(pp
, &head
->chain
) {
7136 if ((pp
->port
== snum
) && net_eq(pp
->net
, sock_net(sk
)))
7143 if (!hlist_empty(&pp
->owner
)) {
7144 /* We had a port hash table hit - there is an
7145 * available port (pp != NULL) and it is being
7146 * used by other socket (pp->owner not empty); that other
7147 * socket is going to be sk2.
7149 int reuse
= sk
->sk_reuse
;
7152 pr_debug("%s: found a possible match\n", __func__
);
7154 if (pp
->fastreuse
&& sk
->sk_reuse
&&
7155 sk
->sk_state
!= SCTP_SS_LISTENING
)
7158 /* Run through the list of sockets bound to the port
7159 * (pp->port) [via the pointers bind_next and
7160 * bind_pprev in the struct sock *sk2 (pp->sk)]. On each one,
7161 * we get the endpoint they describe and run through
7162 * the endpoint's list of IP (v4 or v6) addresses,
7163 * comparing each of the addresses with the address of
7164 * the socket sk. If we find a match, then that means
7165 * that this port/socket (sk) combination are already
7168 sk_for_each_bound(sk2
, &pp
->owner
) {
7169 struct sctp_endpoint
*ep2
;
7170 ep2
= sctp_sk(sk2
)->ep
;
7173 (reuse
&& sk2
->sk_reuse
&&
7174 sk2
->sk_state
!= SCTP_SS_LISTENING
))
7177 if (sctp_bind_addr_conflict(&ep2
->base
.bind_addr
, addr
,
7178 sctp_sk(sk2
), sctp_sk(sk
))) {
7184 pr_debug("%s: found a match\n", __func__
);
7187 /* If there was a hash table miss, create a new port. */
7189 if (!pp
&& !(pp
= sctp_bucket_create(head
, sock_net(sk
), snum
)))
7192 /* In either case (hit or miss), make sure fastreuse is 1 only
7193 * if sk->sk_reuse is too (that is, if the caller requested
7194 * SO_REUSEADDR on this socket -sk-).
7196 if (hlist_empty(&pp
->owner
)) {
7197 if (sk
->sk_reuse
&& sk
->sk_state
!= SCTP_SS_LISTENING
)
7201 } else if (pp
->fastreuse
&&
7202 (!sk
->sk_reuse
|| sk
->sk_state
== SCTP_SS_LISTENING
))
7205 /* We are set, so fill up all the data in the hash table
7206 * entry, tie the socket list information with the rest of the
7207 * sockets FIXME: Blurry, NPI (ipg).
7210 if (!sctp_sk(sk
)->bind_hash
) {
7211 inet_sk(sk
)->inet_num
= snum
;
7212 sk_add_bind_node(sk
, &pp
->owner
);
7213 sctp_sk(sk
)->bind_hash
= pp
;
7218 spin_unlock(&head
->lock
);
7225 /* Assign a 'snum' port to the socket. If snum == 0, an ephemeral
7226 * port is requested.
7228 static int sctp_get_port(struct sock
*sk
, unsigned short snum
)
7230 union sctp_addr addr
;
7231 struct sctp_af
*af
= sctp_sk(sk
)->pf
->af
;
7233 /* Set up a dummy address struct from the sk. */
7234 af
->from_sk(&addr
, sk
);
7235 addr
.v4
.sin_port
= htons(snum
);
7237 /* Note: sk->sk_num gets filled in if ephemeral port request. */
7238 return !!sctp_get_port_local(sk
, &addr
);
7242 * Move a socket to LISTENING state.
7244 static int sctp_listen_start(struct sock
*sk
, int backlog
)
7246 struct sctp_sock
*sp
= sctp_sk(sk
);
7247 struct sctp_endpoint
*ep
= sp
->ep
;
7248 struct crypto_shash
*tfm
= NULL
;
7251 /* Allocate HMAC for generating cookie. */
7252 if (!sp
->hmac
&& sp
->sctp_hmac_alg
) {
7253 sprintf(alg
, "hmac(%s)", sp
->sctp_hmac_alg
);
7254 tfm
= crypto_alloc_shash(alg
, 0, 0);
7256 net_info_ratelimited("failed to load transform for %s: %ld\n",
7257 sp
->sctp_hmac_alg
, PTR_ERR(tfm
));
7260 sctp_sk(sk
)->hmac
= tfm
;
7264 * If a bind() or sctp_bindx() is not called prior to a listen()
7265 * call that allows new associations to be accepted, the system
7266 * picks an ephemeral port and will choose an address set equivalent
7267 * to binding with a wildcard address.
7269 * This is not currently spelled out in the SCTP sockets
7270 * extensions draft, but follows the practice as seen in TCP
7274 sk
->sk_state
= SCTP_SS_LISTENING
;
7275 if (!ep
->base
.bind_addr
.port
) {
7276 if (sctp_autobind(sk
))
7279 if (sctp_get_port(sk
, inet_sk(sk
)->inet_num
)) {
7280 sk
->sk_state
= SCTP_SS_CLOSED
;
7285 sk
->sk_max_ack_backlog
= backlog
;
7286 sctp_hash_endpoint(ep
);
7291 * 4.1.3 / 5.1.3 listen()
7293 * By default, new associations are not accepted for UDP style sockets.
7294 * An application uses listen() to mark a socket as being able to
7295 * accept new associations.
7297 * On TCP style sockets, applications use listen() to ready the SCTP
7298 * endpoint for accepting inbound associations.
7300 * On both types of endpoints a backlog of '0' disables listening.
7302 * Move a socket to LISTENING state.
7304 int sctp_inet_listen(struct socket
*sock
, int backlog
)
7306 struct sock
*sk
= sock
->sk
;
7307 struct sctp_endpoint
*ep
= sctp_sk(sk
)->ep
;
7310 if (unlikely(backlog
< 0))
7315 /* Peeled-off sockets are not allowed to listen(). */
7316 if (sctp_style(sk
, UDP_HIGH_BANDWIDTH
))
7319 if (sock
->state
!= SS_UNCONNECTED
)
7322 if (!sctp_sstate(sk
, LISTENING
) && !sctp_sstate(sk
, CLOSED
))
7325 /* If backlog is zero, disable listening. */
7327 if (sctp_sstate(sk
, CLOSED
))
7331 sctp_unhash_endpoint(ep
);
7332 sk
->sk_state
= SCTP_SS_CLOSED
;
7334 sctp_sk(sk
)->bind_hash
->fastreuse
= 1;
7338 /* If we are already listening, just update the backlog */
7339 if (sctp_sstate(sk
, LISTENING
))
7340 sk
->sk_max_ack_backlog
= backlog
;
7342 err
= sctp_listen_start(sk
, backlog
);
7354 * This function is done by modeling the current datagram_poll() and the
7355 * tcp_poll(). Note that, based on these implementations, we don't
7356 * lock the socket in this function, even though it seems that,
7357 * ideally, locking or some other mechanisms can be used to ensure
7358 * the integrity of the counters (sndbuf and wmem_alloc) used
7359 * in this place. We assume that we don't need locks either until proven
7362 * Another thing to note is that we include the Async I/O support
7363 * here, again, by modeling the current TCP/UDP code. We don't have
7364 * a good way to test with it yet.
7366 unsigned int sctp_poll(struct file
*file
, struct socket
*sock
, poll_table
*wait
)
7368 struct sock
*sk
= sock
->sk
;
7369 struct sctp_sock
*sp
= sctp_sk(sk
);
7372 poll_wait(file
, sk_sleep(sk
), wait
);
7374 sock_rps_record_flow(sk
);
7376 /* A TCP-style listening socket becomes readable when the accept queue
7379 if (sctp_style(sk
, TCP
) && sctp_sstate(sk
, LISTENING
))
7380 return (!list_empty(&sp
->ep
->asocs
)) ?
7381 (POLLIN
| POLLRDNORM
) : 0;
7385 /* Is there any exceptional events? */
7386 if (sk
->sk_err
|| !skb_queue_empty(&sk
->sk_error_queue
))
7388 (sock_flag(sk
, SOCK_SELECT_ERR_QUEUE
) ? POLLPRI
: 0);
7389 if (sk
->sk_shutdown
& RCV_SHUTDOWN
)
7390 mask
|= POLLRDHUP
| POLLIN
| POLLRDNORM
;
7391 if (sk
->sk_shutdown
== SHUTDOWN_MASK
)
7394 /* Is it readable? Reconsider this code with TCP-style support. */
7395 if (!skb_queue_empty(&sk
->sk_receive_queue
))
7396 mask
|= POLLIN
| POLLRDNORM
;
7398 /* The association is either gone or not ready. */
7399 if (!sctp_style(sk
, UDP
) && sctp_sstate(sk
, CLOSED
))
7402 /* Is it writable? */
7403 if (sctp_writeable(sk
)) {
7404 mask
|= POLLOUT
| POLLWRNORM
;
7406 sk_set_bit(SOCKWQ_ASYNC_NOSPACE
, sk
);
7408 * Since the socket is not locked, the buffer
7409 * might be made available after the writeable check and
7410 * before the bit is set. This could cause a lost I/O
7411 * signal. tcp_poll() has a race breaker for this race
7412 * condition. Based on their implementation, we put
7413 * in the following code to cover it as well.
7415 if (sctp_writeable(sk
))
7416 mask
|= POLLOUT
| POLLWRNORM
;
7421 /********************************************************************
7422 * 2nd Level Abstractions
7423 ********************************************************************/
7425 static struct sctp_bind_bucket
*sctp_bucket_create(
7426 struct sctp_bind_hashbucket
*head
, struct net
*net
, unsigned short snum
)
7428 struct sctp_bind_bucket
*pp
;
7430 pp
= kmem_cache_alloc(sctp_bucket_cachep
, GFP_ATOMIC
);
7432 SCTP_DBG_OBJCNT_INC(bind_bucket
);
7435 INIT_HLIST_HEAD(&pp
->owner
);
7437 hlist_add_head(&pp
->node
, &head
->chain
);
7442 /* Caller must hold hashbucket lock for this tb with local BH disabled */
7443 static void sctp_bucket_destroy(struct sctp_bind_bucket
*pp
)
7445 if (pp
&& hlist_empty(&pp
->owner
)) {
7446 __hlist_del(&pp
->node
);
7447 kmem_cache_free(sctp_bucket_cachep
, pp
);
7448 SCTP_DBG_OBJCNT_DEC(bind_bucket
);
7452 /* Release this socket's reference to a local port. */
7453 static inline void __sctp_put_port(struct sock
*sk
)
7455 struct sctp_bind_hashbucket
*head
=
7456 &sctp_port_hashtable
[sctp_phashfn(sock_net(sk
),
7457 inet_sk(sk
)->inet_num
)];
7458 struct sctp_bind_bucket
*pp
;
7460 spin_lock(&head
->lock
);
7461 pp
= sctp_sk(sk
)->bind_hash
;
7462 __sk_del_bind_node(sk
);
7463 sctp_sk(sk
)->bind_hash
= NULL
;
7464 inet_sk(sk
)->inet_num
= 0;
7465 sctp_bucket_destroy(pp
);
7466 spin_unlock(&head
->lock
);
7469 void sctp_put_port(struct sock
*sk
)
7472 __sctp_put_port(sk
);
7477 * The system picks an ephemeral port and choose an address set equivalent
7478 * to binding with a wildcard address.
7479 * One of those addresses will be the primary address for the association.
7480 * This automatically enables the multihoming capability of SCTP.
7482 static int sctp_autobind(struct sock
*sk
)
7484 union sctp_addr autoaddr
;
7488 /* Initialize a local sockaddr structure to INADDR_ANY. */
7489 af
= sctp_sk(sk
)->pf
->af
;
7491 port
= htons(inet_sk(sk
)->inet_num
);
7492 af
->inaddr_any(&autoaddr
, port
);
7494 return sctp_do_bind(sk
, &autoaddr
, af
->sockaddr_len
);
7497 /* Parse out IPPROTO_SCTP CMSG headers. Perform only minimal validation.
7500 * 4.2 The cmsghdr Structure *
7502 * When ancillary data is sent or received, any number of ancillary data
7503 * objects can be specified by the msg_control and msg_controllen members of
7504 * the msghdr structure, because each object is preceded by
7505 * a cmsghdr structure defining the object's length (the cmsg_len member).
7506 * Historically Berkeley-derived implementations have passed only one object
7507 * at a time, but this API allows multiple objects to be
7508 * passed in a single call to sendmsg() or recvmsg(). The following example
7509 * shows two ancillary data objects in a control buffer.
7511 * |<--------------------------- msg_controllen -------------------------->|
7514 * |<----- ancillary data object ----->|<----- ancillary data object ----->|
7516 * |<---------- CMSG_SPACE() --------->|<---------- CMSG_SPACE() --------->|
7519 * |<---------- cmsg_len ---------->| |<--------- cmsg_len ----------->| |
7521 * |<--------- CMSG_LEN() --------->| |<-------- CMSG_LEN() ---------->| |
7524 * +-----+-----+-----+--+-----------+--+-----+-----+-----+--+-----------+--+
7525 * |cmsg_|cmsg_|cmsg_|XX| |XX|cmsg_|cmsg_|cmsg_|XX| |XX|
7527 * |len |level|type |XX|cmsg_data[]|XX|len |level|type |XX|cmsg_data[]|XX|
7529 * +-----+-----+-----+--+-----------+--+-----+-----+-----+--+-----------+--+
7536 static int sctp_msghdr_parse(const struct msghdr
*msg
, struct sctp_cmsgs
*cmsgs
)
7538 struct msghdr
*my_msg
= (struct msghdr
*)msg
;
7539 struct cmsghdr
*cmsg
;
7541 for_each_cmsghdr(cmsg
, my_msg
) {
7542 if (!CMSG_OK(my_msg
, cmsg
))
7545 /* Should we parse this header or ignore? */
7546 if (cmsg
->cmsg_level
!= IPPROTO_SCTP
)
7549 /* Strictly check lengths following example in SCM code. */
7550 switch (cmsg
->cmsg_type
) {
7552 /* SCTP Socket API Extension
7553 * 5.3.1 SCTP Initiation Structure (SCTP_INIT)
7555 * This cmsghdr structure provides information for
7556 * initializing new SCTP associations with sendmsg().
7557 * The SCTP_INITMSG socket option uses this same data
7558 * structure. This structure is not used for
7561 * cmsg_level cmsg_type cmsg_data[]
7562 * ------------ ------------ ----------------------
7563 * IPPROTO_SCTP SCTP_INIT struct sctp_initmsg
7565 if (cmsg
->cmsg_len
!= CMSG_LEN(sizeof(struct sctp_initmsg
)))
7568 cmsgs
->init
= CMSG_DATA(cmsg
);
7572 /* SCTP Socket API Extension
7573 * 5.3.2 SCTP Header Information Structure(SCTP_SNDRCV)
7575 * This cmsghdr structure specifies SCTP options for
7576 * sendmsg() and describes SCTP header information
7577 * about a received message through recvmsg().
7579 * cmsg_level cmsg_type cmsg_data[]
7580 * ------------ ------------ ----------------------
7581 * IPPROTO_SCTP SCTP_SNDRCV struct sctp_sndrcvinfo
7583 if (cmsg
->cmsg_len
!= CMSG_LEN(sizeof(struct sctp_sndrcvinfo
)))
7586 cmsgs
->srinfo
= CMSG_DATA(cmsg
);
7588 if (cmsgs
->srinfo
->sinfo_flags
&
7589 ~(SCTP_UNORDERED
| SCTP_ADDR_OVER
|
7590 SCTP_SACK_IMMEDIATELY
| SCTP_PR_SCTP_MASK
|
7591 SCTP_ABORT
| SCTP_EOF
))
7596 /* SCTP Socket API Extension
7597 * 5.3.4 SCTP Send Information Structure (SCTP_SNDINFO)
7599 * This cmsghdr structure specifies SCTP options for
7600 * sendmsg(). This structure and SCTP_RCVINFO replaces
7601 * SCTP_SNDRCV which has been deprecated.
7603 * cmsg_level cmsg_type cmsg_data[]
7604 * ------------ ------------ ---------------------
7605 * IPPROTO_SCTP SCTP_SNDINFO struct sctp_sndinfo
7607 if (cmsg
->cmsg_len
!= CMSG_LEN(sizeof(struct sctp_sndinfo
)))
7610 cmsgs
->sinfo
= CMSG_DATA(cmsg
);
7612 if (cmsgs
->sinfo
->snd_flags
&
7613 ~(SCTP_UNORDERED
| SCTP_ADDR_OVER
|
7614 SCTP_SACK_IMMEDIATELY
| SCTP_PR_SCTP_MASK
|
7615 SCTP_ABORT
| SCTP_EOF
))
7627 * Wait for a packet..
7628 * Note: This function is the same function as in core/datagram.c
7629 * with a few modifications to make lksctp work.
7631 static int sctp_wait_for_packet(struct sock
*sk
, int *err
, long *timeo_p
)
7636 prepare_to_wait_exclusive(sk_sleep(sk
), &wait
, TASK_INTERRUPTIBLE
);
7638 /* Socket errors? */
7639 error
= sock_error(sk
);
7643 if (!skb_queue_empty(&sk
->sk_receive_queue
))
7646 /* Socket shut down? */
7647 if (sk
->sk_shutdown
& RCV_SHUTDOWN
)
7650 /* Sequenced packets can come disconnected. If so we report the
7655 /* Is there a good reason to think that we may receive some data? */
7656 if (list_empty(&sctp_sk(sk
)->ep
->asocs
) && !sctp_sstate(sk
, LISTENING
))
7659 /* Handle signals. */
7660 if (signal_pending(current
))
7663 /* Let another process have a go. Since we are going to sleep
7664 * anyway. Note: This may cause odd behaviors if the message
7665 * does not fit in the user's buffer, but this seems to be the
7666 * only way to honor MSG_DONTWAIT realistically.
7669 *timeo_p
= schedule_timeout(*timeo_p
);
7673 finish_wait(sk_sleep(sk
), &wait
);
7677 error
= sock_intr_errno(*timeo_p
);
7680 finish_wait(sk_sleep(sk
), &wait
);
7685 /* Receive a datagram.
7686 * Note: This is pretty much the same routine as in core/datagram.c
7687 * with a few changes to make lksctp work.
7689 struct sk_buff
*sctp_skb_recv_datagram(struct sock
*sk
, int flags
,
7690 int noblock
, int *err
)
7693 struct sk_buff
*skb
;
7696 timeo
= sock_rcvtimeo(sk
, noblock
);
7698 pr_debug("%s: timeo:%ld, max:%ld\n", __func__
, timeo
,
7699 MAX_SCHEDULE_TIMEOUT
);
7702 /* Again only user level code calls this function,
7703 * so nothing interrupt level
7704 * will suddenly eat the receive_queue.
7706 * Look at current nfs client by the way...
7707 * However, this function was correct in any case. 8)
7709 if (flags
& MSG_PEEK
) {
7710 skb
= skb_peek(&sk
->sk_receive_queue
);
7712 refcount_inc(&skb
->users
);
7714 skb
= __skb_dequeue(&sk
->sk_receive_queue
);
7720 /* Caller is allowed not to check sk->sk_err before calling. */
7721 error
= sock_error(sk
);
7725 if (sk
->sk_shutdown
& RCV_SHUTDOWN
)
7728 if (sk_can_busy_loop(sk
)) {
7729 sk_busy_loop(sk
, noblock
);
7731 if (!skb_queue_empty(&sk
->sk_receive_queue
))
7735 /* User doesn't want to wait. */
7739 } while (sctp_wait_for_packet(sk
, err
, &timeo
) == 0);
7748 /* If sndbuf has changed, wake up per association sndbuf waiters. */
7749 static void __sctp_write_space(struct sctp_association
*asoc
)
7751 struct sock
*sk
= asoc
->base
.sk
;
7753 if (sctp_wspace(asoc
) <= 0)
7756 if (waitqueue_active(&asoc
->wait
))
7757 wake_up_interruptible(&asoc
->wait
);
7759 if (sctp_writeable(sk
)) {
7760 struct socket_wq
*wq
;
7763 wq
= rcu_dereference(sk
->sk_wq
);
7765 if (waitqueue_active(&wq
->wait
))
7766 wake_up_interruptible(&wq
->wait
);
7768 /* Note that we try to include the Async I/O support
7769 * here by modeling from the current TCP/UDP code.
7770 * We have not tested with it yet.
7772 if (!(sk
->sk_shutdown
& SEND_SHUTDOWN
))
7773 sock_wake_async(wq
, SOCK_WAKE_SPACE
, POLL_OUT
);
7779 static void sctp_wake_up_waiters(struct sock
*sk
,
7780 struct sctp_association
*asoc
)
7782 struct sctp_association
*tmp
= asoc
;
7784 /* We do accounting for the sndbuf space per association,
7785 * so we only need to wake our own association.
7787 if (asoc
->ep
->sndbuf_policy
)
7788 return __sctp_write_space(asoc
);
7790 /* If association goes down and is just flushing its
7791 * outq, then just normally notify others.
7793 if (asoc
->base
.dead
)
7794 return sctp_write_space(sk
);
7796 /* Accounting for the sndbuf space is per socket, so we
7797 * need to wake up others, try to be fair and in case of
7798 * other associations, let them have a go first instead
7799 * of just doing a sctp_write_space() call.
7801 * Note that we reach sctp_wake_up_waiters() only when
7802 * associations free up queued chunks, thus we are under
7803 * lock and the list of associations on a socket is
7804 * guaranteed not to change.
7806 for (tmp
= list_next_entry(tmp
, asocs
); 1;
7807 tmp
= list_next_entry(tmp
, asocs
)) {
7808 /* Manually skip the head element. */
7809 if (&tmp
->asocs
== &((sctp_sk(sk
))->ep
->asocs
))
7811 /* Wake up association. */
7812 __sctp_write_space(tmp
);
7813 /* We've reached the end. */
7819 /* Do accounting for the sndbuf space.
7820 * Decrement the used sndbuf space of the corresponding association by the
7821 * data size which was just transmitted(freed).
7823 static void sctp_wfree(struct sk_buff
*skb
)
7825 struct sctp_chunk
*chunk
= skb_shinfo(skb
)->destructor_arg
;
7826 struct sctp_association
*asoc
= chunk
->asoc
;
7827 struct sock
*sk
= asoc
->base
.sk
;
7829 asoc
->sndbuf_used
-= SCTP_DATA_SNDSIZE(chunk
) +
7830 sizeof(struct sk_buff
) +
7831 sizeof(struct sctp_chunk
);
7833 WARN_ON(refcount_sub_and_test(sizeof(struct sctp_chunk
), &sk
->sk_wmem_alloc
));
7836 * This undoes what is done via sctp_set_owner_w and sk_mem_charge
7838 sk
->sk_wmem_queued
-= skb
->truesize
;
7839 sk_mem_uncharge(sk
, skb
->truesize
);
7842 sctp_wake_up_waiters(sk
, asoc
);
7844 sctp_association_put(asoc
);
7847 /* Do accounting for the receive space on the socket.
7848 * Accounting for the association is done in ulpevent.c
7849 * We set this as a destructor for the cloned data skbs so that
7850 * accounting is done at the correct time.
7852 void sctp_sock_rfree(struct sk_buff
*skb
)
7854 struct sock
*sk
= skb
->sk
;
7855 struct sctp_ulpevent
*event
= sctp_skb2event(skb
);
7857 atomic_sub(event
->rmem_len
, &sk
->sk_rmem_alloc
);
7860 * Mimic the behavior of sock_rfree
7862 sk_mem_uncharge(sk
, event
->rmem_len
);
7866 /* Helper function to wait for space in the sndbuf. */
7867 static int sctp_wait_for_sndbuf(struct sctp_association
*asoc
, long *timeo_p
,
7870 struct sock
*sk
= asoc
->base
.sk
;
7871 long current_timeo
= *timeo_p
;
7875 pr_debug("%s: asoc:%p, timeo:%ld, msg_len:%zu\n", __func__
, asoc
,
7878 /* Increment the association's refcnt. */
7879 sctp_association_hold(asoc
);
7881 /* Wait on the association specific sndbuf space. */
7883 prepare_to_wait_exclusive(&asoc
->wait
, &wait
,
7884 TASK_INTERRUPTIBLE
);
7885 if (asoc
->base
.dead
)
7889 if (sk
->sk_err
|| asoc
->state
>= SCTP_STATE_SHUTDOWN_PENDING
)
7891 if (signal_pending(current
))
7892 goto do_interrupted
;
7893 if (msg_len
<= sctp_wspace(asoc
))
7896 /* Let another process have a go. Since we are going
7900 current_timeo
= schedule_timeout(current_timeo
);
7902 if (sk
!= asoc
->base
.sk
)
7905 *timeo_p
= current_timeo
;
7909 finish_wait(&asoc
->wait
, &wait
);
7911 /* Release the association's refcnt. */
7912 sctp_association_put(asoc
);
7925 err
= sock_intr_errno(*timeo_p
);
7933 void sctp_data_ready(struct sock
*sk
)
7935 struct socket_wq
*wq
;
7938 wq
= rcu_dereference(sk
->sk_wq
);
7939 if (skwq_has_sleeper(wq
))
7940 wake_up_interruptible_sync_poll(&wq
->wait
, POLLIN
|
7941 POLLRDNORM
| POLLRDBAND
);
7942 sk_wake_async(sk
, SOCK_WAKE_WAITD
, POLL_IN
);
7946 /* If socket sndbuf has changed, wake up all per association waiters. */
7947 void sctp_write_space(struct sock
*sk
)
7949 struct sctp_association
*asoc
;
7951 /* Wake up the tasks in each wait queue. */
7952 list_for_each_entry(asoc
, &((sctp_sk(sk
))->ep
->asocs
), asocs
) {
7953 __sctp_write_space(asoc
);
7957 /* Is there any sndbuf space available on the socket?
7959 * Note that sk_wmem_alloc is the sum of the send buffers on all of the
7960 * associations on the same socket. For a UDP-style socket with
7961 * multiple associations, it is possible for it to be "unwriteable"
7962 * prematurely. I assume that this is acceptable because
7963 * a premature "unwriteable" is better than an accidental "writeable" which
7964 * would cause an unwanted block under certain circumstances. For the 1-1
7965 * UDP-style sockets or TCP-style sockets, this code should work.
7968 static int sctp_writeable(struct sock
*sk
)
7972 amt
= sk
->sk_sndbuf
- sk_wmem_alloc_get(sk
);
7978 /* Wait for an association to go into ESTABLISHED state. If timeout is 0,
7979 * returns immediately with EINPROGRESS.
7981 static int sctp_wait_for_connect(struct sctp_association
*asoc
, long *timeo_p
)
7983 struct sock
*sk
= asoc
->base
.sk
;
7985 long current_timeo
= *timeo_p
;
7988 pr_debug("%s: asoc:%p, timeo:%ld\n", __func__
, asoc
, *timeo_p
);
7990 /* Increment the association's refcnt. */
7991 sctp_association_hold(asoc
);
7994 prepare_to_wait_exclusive(&asoc
->wait
, &wait
,
7995 TASK_INTERRUPTIBLE
);
7998 if (sk
->sk_shutdown
& RCV_SHUTDOWN
)
8000 if (sk
->sk_err
|| asoc
->state
>= SCTP_STATE_SHUTDOWN_PENDING
||
8003 if (signal_pending(current
))
8004 goto do_interrupted
;
8006 if (sctp_state(asoc
, ESTABLISHED
))
8009 /* Let another process have a go. Since we are going
8013 current_timeo
= schedule_timeout(current_timeo
);
8016 *timeo_p
= current_timeo
;
8020 finish_wait(&asoc
->wait
, &wait
);
8022 /* Release the association's refcnt. */
8023 sctp_association_put(asoc
);
8028 if (asoc
->init_err_counter
+ 1 > asoc
->max_init_attempts
)
8031 err
= -ECONNREFUSED
;
8035 err
= sock_intr_errno(*timeo_p
);
8043 static int sctp_wait_for_accept(struct sock
*sk
, long timeo
)
8045 struct sctp_endpoint
*ep
;
8049 ep
= sctp_sk(sk
)->ep
;
8053 prepare_to_wait_exclusive(sk_sleep(sk
), &wait
,
8054 TASK_INTERRUPTIBLE
);
8056 if (list_empty(&ep
->asocs
)) {
8058 timeo
= schedule_timeout(timeo
);
8063 if (!sctp_sstate(sk
, LISTENING
))
8067 if (!list_empty(&ep
->asocs
))
8070 err
= sock_intr_errno(timeo
);
8071 if (signal_pending(current
))
8079 finish_wait(sk_sleep(sk
), &wait
);
8084 static void sctp_wait_for_close(struct sock
*sk
, long timeout
)
8089 prepare_to_wait(sk_sleep(sk
), &wait
, TASK_INTERRUPTIBLE
);
8090 if (list_empty(&sctp_sk(sk
)->ep
->asocs
))
8093 timeout
= schedule_timeout(timeout
);
8095 } while (!signal_pending(current
) && timeout
);
8097 finish_wait(sk_sleep(sk
), &wait
);
8100 static void sctp_skb_set_owner_r_frag(struct sk_buff
*skb
, struct sock
*sk
)
8102 struct sk_buff
*frag
;
8107 /* Don't forget the fragments. */
8108 skb_walk_frags(skb
, frag
)
8109 sctp_skb_set_owner_r_frag(frag
, sk
);
8112 sctp_skb_set_owner_r(skb
, sk
);
8115 void sctp_copy_sock(struct sock
*newsk
, struct sock
*sk
,
8116 struct sctp_association
*asoc
)
8118 struct inet_sock
*inet
= inet_sk(sk
);
8119 struct inet_sock
*newinet
;
8121 newsk
->sk_type
= sk
->sk_type
;
8122 newsk
->sk_bound_dev_if
= sk
->sk_bound_dev_if
;
8123 newsk
->sk_flags
= sk
->sk_flags
;
8124 newsk
->sk_tsflags
= sk
->sk_tsflags
;
8125 newsk
->sk_no_check_tx
= sk
->sk_no_check_tx
;
8126 newsk
->sk_no_check_rx
= sk
->sk_no_check_rx
;
8127 newsk
->sk_reuse
= sk
->sk_reuse
;
8129 newsk
->sk_shutdown
= sk
->sk_shutdown
;
8130 newsk
->sk_destruct
= sctp_destruct_sock
;
8131 newsk
->sk_family
= sk
->sk_family
;
8132 newsk
->sk_protocol
= IPPROTO_SCTP
;
8133 newsk
->sk_backlog_rcv
= sk
->sk_prot
->backlog_rcv
;
8134 newsk
->sk_sndbuf
= sk
->sk_sndbuf
;
8135 newsk
->sk_rcvbuf
= sk
->sk_rcvbuf
;
8136 newsk
->sk_lingertime
= sk
->sk_lingertime
;
8137 newsk
->sk_rcvtimeo
= sk
->sk_rcvtimeo
;
8138 newsk
->sk_sndtimeo
= sk
->sk_sndtimeo
;
8139 newsk
->sk_rxhash
= sk
->sk_rxhash
;
8141 newinet
= inet_sk(newsk
);
8143 /* Initialize sk's sport, dport, rcv_saddr and daddr for
8144 * getsockname() and getpeername()
8146 newinet
->inet_sport
= inet
->inet_sport
;
8147 newinet
->inet_saddr
= inet
->inet_saddr
;
8148 newinet
->inet_rcv_saddr
= inet
->inet_rcv_saddr
;
8149 newinet
->inet_dport
= htons(asoc
->peer
.port
);
8150 newinet
->pmtudisc
= inet
->pmtudisc
;
8151 newinet
->inet_id
= asoc
->next_tsn
^ jiffies
;
8153 newinet
->uc_ttl
= inet
->uc_ttl
;
8154 newinet
->mc_loop
= 1;
8155 newinet
->mc_ttl
= 1;
8156 newinet
->mc_index
= 0;
8157 newinet
->mc_list
= NULL
;
8159 if (newsk
->sk_flags
& SK_FLAGS_TIMESTAMP
)
8160 net_enable_timestamp();
8162 security_sk_clone(sk
, newsk
);
8165 static inline void sctp_copy_descendant(struct sock
*sk_to
,
8166 const struct sock
*sk_from
)
8168 int ancestor_size
= sizeof(struct inet_sock
) +
8169 sizeof(struct sctp_sock
) -
8170 offsetof(struct sctp_sock
, auto_asconf_list
);
8172 if (sk_from
->sk_family
== PF_INET6
)
8173 ancestor_size
+= sizeof(struct ipv6_pinfo
);
8175 __inet_sk_copy_descendant(sk_to
, sk_from
, ancestor_size
);
8178 /* Populate the fields of the newsk from the oldsk and migrate the assoc
8179 * and its messages to the newsk.
8181 static void sctp_sock_migrate(struct sock
*oldsk
, struct sock
*newsk
,
8182 struct sctp_association
*assoc
,
8183 enum sctp_socket_type type
)
8185 struct sctp_sock
*oldsp
= sctp_sk(oldsk
);
8186 struct sctp_sock
*newsp
= sctp_sk(newsk
);
8187 struct sctp_bind_bucket
*pp
; /* hash list port iterator */
8188 struct sctp_endpoint
*newep
= newsp
->ep
;
8189 struct sk_buff
*skb
, *tmp
;
8190 struct sctp_ulpevent
*event
;
8191 struct sctp_bind_hashbucket
*head
;
8193 /* Migrate socket buffer sizes and all the socket level options to the
8196 newsk
->sk_sndbuf
= oldsk
->sk_sndbuf
;
8197 newsk
->sk_rcvbuf
= oldsk
->sk_rcvbuf
;
8198 /* Brute force copy old sctp opt. */
8199 sctp_copy_descendant(newsk
, oldsk
);
8201 /* Restore the ep value that was overwritten with the above structure
8207 /* Hook this new socket in to the bind_hash list. */
8208 head
= &sctp_port_hashtable
[sctp_phashfn(sock_net(oldsk
),
8209 inet_sk(oldsk
)->inet_num
)];
8210 spin_lock_bh(&head
->lock
);
8211 pp
= sctp_sk(oldsk
)->bind_hash
;
8212 sk_add_bind_node(newsk
, &pp
->owner
);
8213 sctp_sk(newsk
)->bind_hash
= pp
;
8214 inet_sk(newsk
)->inet_num
= inet_sk(oldsk
)->inet_num
;
8215 spin_unlock_bh(&head
->lock
);
8217 /* Copy the bind_addr list from the original endpoint to the new
8218 * endpoint so that we can handle restarts properly
8220 sctp_bind_addr_dup(&newsp
->ep
->base
.bind_addr
,
8221 &oldsp
->ep
->base
.bind_addr
, GFP_KERNEL
);
8223 /* Move any messages in the old socket's receive queue that are for the
8224 * peeled off association to the new socket's receive queue.
8226 sctp_skb_for_each(skb
, &oldsk
->sk_receive_queue
, tmp
) {
8227 event
= sctp_skb2event(skb
);
8228 if (event
->asoc
== assoc
) {
8229 __skb_unlink(skb
, &oldsk
->sk_receive_queue
);
8230 __skb_queue_tail(&newsk
->sk_receive_queue
, skb
);
8231 sctp_skb_set_owner_r_frag(skb
, newsk
);
8235 /* Clean up any messages pending delivery due to partial
8236 * delivery. Three cases:
8237 * 1) No partial deliver; no work.
8238 * 2) Peeling off partial delivery; keep pd_lobby in new pd_lobby.
8239 * 3) Peeling off non-partial delivery; move pd_lobby to receive_queue.
8241 skb_queue_head_init(&newsp
->pd_lobby
);
8242 atomic_set(&sctp_sk(newsk
)->pd_mode
, assoc
->ulpq
.pd_mode
);
8244 if (atomic_read(&sctp_sk(oldsk
)->pd_mode
)) {
8245 struct sk_buff_head
*queue
;
8247 /* Decide which queue to move pd_lobby skbs to. */
8248 if (assoc
->ulpq
.pd_mode
) {
8249 queue
= &newsp
->pd_lobby
;
8251 queue
= &newsk
->sk_receive_queue
;
8253 /* Walk through the pd_lobby, looking for skbs that
8254 * need moved to the new socket.
8256 sctp_skb_for_each(skb
, &oldsp
->pd_lobby
, tmp
) {
8257 event
= sctp_skb2event(skb
);
8258 if (event
->asoc
== assoc
) {
8259 __skb_unlink(skb
, &oldsp
->pd_lobby
);
8260 __skb_queue_tail(queue
, skb
);
8261 sctp_skb_set_owner_r_frag(skb
, newsk
);
8265 /* Clear up any skbs waiting for the partial
8266 * delivery to finish.
8268 if (assoc
->ulpq
.pd_mode
)
8269 sctp_clear_pd(oldsk
, NULL
);
8273 sctp_skb_for_each(skb
, &assoc
->ulpq
.reasm
, tmp
)
8274 sctp_skb_set_owner_r_frag(skb
, newsk
);
8276 sctp_skb_for_each(skb
, &assoc
->ulpq
.lobby
, tmp
)
8277 sctp_skb_set_owner_r_frag(skb
, newsk
);
8279 /* Set the type of socket to indicate that it is peeled off from the
8280 * original UDP-style socket or created with the accept() call on a
8281 * TCP-style socket..
8285 /* Mark the new socket "in-use" by the user so that any packets
8286 * that may arrive on the association after we've moved it are
8287 * queued to the backlog. This prevents a potential race between
8288 * backlog processing on the old socket and new-packet processing
8289 * on the new socket.
8291 * The caller has just allocated newsk so we can guarantee that other
8292 * paths won't try to lock it and then oldsk.
8294 lock_sock_nested(newsk
, SINGLE_DEPTH_NESTING
);
8295 sctp_for_each_tx_datachunk(assoc
, sctp_clear_owner_w
);
8296 sctp_assoc_migrate(assoc
, newsk
);
8297 sctp_for_each_tx_datachunk(assoc
, sctp_set_owner_w
);
8299 /* If the association on the newsk is already closed before accept()
8300 * is called, set RCV_SHUTDOWN flag.
8302 if (sctp_state(assoc
, CLOSED
) && sctp_style(newsk
, TCP
)) {
8303 newsk
->sk_state
= SCTP_SS_CLOSED
;
8304 newsk
->sk_shutdown
|= RCV_SHUTDOWN
;
8306 newsk
->sk_state
= SCTP_SS_ESTABLISHED
;
8309 release_sock(newsk
);
8313 /* This proto struct describes the ULP interface for SCTP. */
8314 struct proto sctp_prot
= {
8316 .owner
= THIS_MODULE
,
8317 .close
= sctp_close
,
8318 .connect
= sctp_connect
,
8319 .disconnect
= sctp_disconnect
,
8320 .accept
= sctp_accept
,
8321 .ioctl
= sctp_ioctl
,
8322 .init
= sctp_init_sock
,
8323 .destroy
= sctp_destroy_sock
,
8324 .shutdown
= sctp_shutdown
,
8325 .setsockopt
= sctp_setsockopt
,
8326 .getsockopt
= sctp_getsockopt
,
8327 .sendmsg
= sctp_sendmsg
,
8328 .recvmsg
= sctp_recvmsg
,
8330 .backlog_rcv
= sctp_backlog_rcv
,
8332 .unhash
= sctp_unhash
,
8333 .get_port
= sctp_get_port
,
8334 .obj_size
= sizeof(struct sctp_sock
),
8335 .sysctl_mem
= sysctl_sctp_mem
,
8336 .sysctl_rmem
= sysctl_sctp_rmem
,
8337 .sysctl_wmem
= sysctl_sctp_wmem
,
8338 .memory_pressure
= &sctp_memory_pressure
,
8339 .enter_memory_pressure
= sctp_enter_memory_pressure
,
8340 .memory_allocated
= &sctp_memory_allocated
,
8341 .sockets_allocated
= &sctp_sockets_allocated
,
8344 #if IS_ENABLED(CONFIG_IPV6)
8346 #include <net/transp_v6.h>
8347 static void sctp_v6_destroy_sock(struct sock
*sk
)
8349 sctp_destroy_sock(sk
);
8350 inet6_destroy_sock(sk
);
8353 struct proto sctpv6_prot
= {
8355 .owner
= THIS_MODULE
,
8356 .close
= sctp_close
,
8357 .connect
= sctp_connect
,
8358 .disconnect
= sctp_disconnect
,
8359 .accept
= sctp_accept
,
8360 .ioctl
= sctp_ioctl
,
8361 .init
= sctp_init_sock
,
8362 .destroy
= sctp_v6_destroy_sock
,
8363 .shutdown
= sctp_shutdown
,
8364 .setsockopt
= sctp_setsockopt
,
8365 .getsockopt
= sctp_getsockopt
,
8366 .sendmsg
= sctp_sendmsg
,
8367 .recvmsg
= sctp_recvmsg
,
8369 .backlog_rcv
= sctp_backlog_rcv
,
8371 .unhash
= sctp_unhash
,
8372 .get_port
= sctp_get_port
,
8373 .obj_size
= sizeof(struct sctp6_sock
),
8374 .sysctl_mem
= sysctl_sctp_mem
,
8375 .sysctl_rmem
= sysctl_sctp_rmem
,
8376 .sysctl_wmem
= sysctl_sctp_wmem
,
8377 .memory_pressure
= &sctp_memory_pressure
,
8378 .enter_memory_pressure
= sctp_enter_memory_pressure
,
8379 .memory_allocated
= &sctp_memory_allocated
,
8380 .sockets_allocated
= &sctp_sockets_allocated
,
8382 #endif /* IS_ENABLED(CONFIG_IPV6) */