1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* SCTP kernel implementation
3 * (C) Copyright IBM Corp. 2001, 2004
4 * Copyright (c) 1999-2000 Cisco, Inc.
5 * Copyright (c) 1999-2001 Motorola, Inc.
6 * Copyright (c) 2001-2003 Intel Corp.
7 * Copyright (c) 2001-2002 Nokia, Inc.
8 * Copyright (c) 2001 La Monte H.P. Yarroll
10 * This file is part of the SCTP kernel implementation
12 * These functions interface with the sockets layer to implement the
13 * SCTP Extensions for the Sockets API.
15 * Note that the descriptions from the specification are USER level
16 * functions--this file is the functions which populate the struct proto
17 * for SCTP which is the BOTTOM of the sockets interface.
19 * Please send any bug reports or fixes you make to the
21 * lksctp developers <linux-sctp@vger.kernel.org>
23 * Written or modified by:
24 * La Monte H.P. Yarroll <piggy@acm.org>
25 * Narasimha Budihal <narsi@refcode.org>
26 * Karl Knutson <karl@athena.chicago.il.us>
27 * Jon Grimm <jgrimm@us.ibm.com>
28 * Xingang Guo <xingang.guo@intel.com>
29 * Daisy Chang <daisyc@us.ibm.com>
30 * Sridhar Samudrala <samudrala@us.ibm.com>
31 * Inaky Perez-Gonzalez <inaky.gonzalez@intel.com>
32 * Ardelle Fan <ardelle.fan@intel.com>
33 * Ryan Layer <rmlayer@us.ibm.com>
34 * Anup Pemmaiah <pemmaiah@cc.usu.edu>
35 * Kevin Gao <kevin.gao@intel.com>
38 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
40 #include <crypto/hash.h>
41 #include <linux/types.h>
42 #include <linux/kernel.h>
43 #include <linux/wait.h>
44 #include <linux/time.h>
45 #include <linux/sched/signal.h>
47 #include <linux/capability.h>
48 #include <linux/fcntl.h>
49 #include <linux/poll.h>
50 #include <linux/init.h>
51 #include <linux/slab.h>
52 #include <linux/file.h>
53 #include <linux/compat.h>
54 #include <linux/rhashtable.h>
58 #include <net/route.h>
60 #include <net/inet_common.h>
61 #include <net/busy_poll.h>
63 #include <linux/socket.h> /* for sa_family_t */
64 #include <linux/export.h>
66 #include <net/sctp/sctp.h>
67 #include <net/sctp/sm.h>
68 #include <net/sctp/stream_sched.h>
70 /* Forward declarations for internal helper functions. */
71 static bool sctp_writeable(struct sock *sk);
72 static void sctp_wfree(struct sk_buff *skb);
73 static int sctp_wait_for_sndbuf(struct sctp_association *asoc, long *timeo_p,
75 static int sctp_wait_for_packet(struct sock *sk, int *err, long *timeo_p);
76 static int sctp_wait_for_connect(struct sctp_association *, long *timeo_p);
77 static int sctp_wait_for_accept(struct sock *sk, long timeo);
78 static void sctp_wait_for_close(struct sock *sk, long timeo);
79 static void sctp_destruct_sock(struct sock *sk);
80 static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt,
81 union sctp_addr *addr, int len);
82 static int sctp_bindx_add(struct sock *, struct sockaddr *, int);
83 static int sctp_bindx_rem(struct sock *, struct sockaddr *, int);
84 static int sctp_send_asconf_add_ip(struct sock *, struct sockaddr *, int);
85 static int sctp_send_asconf_del_ip(struct sock *, struct sockaddr *, int);
86 static int sctp_send_asconf(struct sctp_association *asoc,
87 struct sctp_chunk *chunk);
88 static int sctp_do_bind(struct sock *, union sctp_addr *, int);
89 static int sctp_autobind(struct sock *sk);
90 static int sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
91 struct sctp_association *assoc,
92 enum sctp_socket_type type);
94 static unsigned long sctp_memory_pressure;
95 static atomic_long_t sctp_memory_allocated;
96 struct percpu_counter sctp_sockets_allocated;
98 static void sctp_enter_memory_pressure(struct sock *sk)
100 sctp_memory_pressure = 1;
104 /* Get the sndbuf space available at the time on the association. */
105 static inline int sctp_wspace(struct sctp_association *asoc)
107 struct sock *sk = asoc->base.sk;
109 return asoc->ep->sndbuf_policy ? sk->sk_sndbuf - asoc->sndbuf_used
110 : sk_stream_wspace(sk);
113 /* Increment the used sndbuf space count of the corresponding association by
114 * the size of the outgoing data chunk.
115 * Also, set the skb destructor for sndbuf accounting later.
117 * Since it is always 1-1 between chunk and skb, and also a new skb is always
118 * allocated for chunk bundling in sctp_packet_transmit(), we can use the
119 * destructor in the data chunk skb for the purpose of the sndbuf space
122 static inline void sctp_set_owner_w(struct sctp_chunk *chunk)
124 struct sctp_association *asoc = chunk->asoc;
125 struct sock *sk = asoc->base.sk;
127 /* The sndbuf space is tracked per association. */
128 sctp_association_hold(asoc);
131 sctp_auth_shkey_hold(chunk->shkey);
133 skb_set_owner_w(chunk->skb, sk);
135 chunk->skb->destructor = sctp_wfree;
136 /* Save the chunk pointer in skb for sctp_wfree to use later. */
137 skb_shinfo(chunk->skb)->destructor_arg = chunk;
139 refcount_add(sizeof(struct sctp_chunk), &sk->sk_wmem_alloc);
140 asoc->sndbuf_used += chunk->skb->truesize + sizeof(struct sctp_chunk);
141 sk->sk_wmem_queued += chunk->skb->truesize + sizeof(struct sctp_chunk);
142 sk_mem_charge(sk, chunk->skb->truesize);
145 static void sctp_clear_owner_w(struct sctp_chunk *chunk)
147 skb_orphan(chunk->skb);
150 #define traverse_and_process() \
153 if (msg == prev_msg) \
155 list_for_each_entry(c, &msg->chunks, frag_list) { \
156 if ((clear && asoc->base.sk == c->skb->sk) || \
157 (!clear && asoc->base.sk != c->skb->sk)) \
163 static void sctp_for_each_tx_datachunk(struct sctp_association *asoc,
165 void (*cb)(struct sctp_chunk *))
168 struct sctp_datamsg *msg, *prev_msg = NULL;
169 struct sctp_outq *q = &asoc->outqueue;
170 struct sctp_chunk *chunk, *c;
171 struct sctp_transport *t;
173 list_for_each_entry(t, &asoc->peer.transport_addr_list, transports)
174 list_for_each_entry(chunk, &t->transmitted, transmitted_list)
175 traverse_and_process();
177 list_for_each_entry(chunk, &q->retransmit, transmitted_list)
178 traverse_and_process();
180 list_for_each_entry(chunk, &q->sacked, transmitted_list)
181 traverse_and_process();
183 list_for_each_entry(chunk, &q->abandoned, transmitted_list)
184 traverse_and_process();
186 list_for_each_entry(chunk, &q->out_chunk_list, list)
187 traverse_and_process();
190 static void sctp_for_each_rx_skb(struct sctp_association *asoc, struct sock *sk,
191 void (*cb)(struct sk_buff *, struct sock *))
194 struct sk_buff *skb, *tmp;
196 sctp_skb_for_each(skb, &asoc->ulpq.lobby, tmp)
199 sctp_skb_for_each(skb, &asoc->ulpq.reasm, tmp)
202 sctp_skb_for_each(skb, &asoc->ulpq.reasm_uo, tmp)
206 /* Verify that this is a valid address. */
207 static inline int sctp_verify_addr(struct sock *sk, union sctp_addr *addr,
212 /* Verify basic sockaddr. */
213 af = sctp_sockaddr_af(sctp_sk(sk), addr, len);
217 /* Is this a valid SCTP address? */
218 if (!af->addr_valid(addr, sctp_sk(sk), NULL))
221 if (!sctp_sk(sk)->pf->send_verify(sctp_sk(sk), (addr)))
227 /* Look up the association by its id. If this is not a UDP-style
228 * socket, the ID field is always ignored.
230 struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id)
232 struct sctp_association *asoc = NULL;
234 /* If this is not a UDP-style socket, assoc id should be ignored. */
235 if (!sctp_style(sk, UDP)) {
236 /* Return NULL if the socket state is not ESTABLISHED. It
237 * could be a TCP-style listening socket or a socket which
238 * hasn't yet called connect() to establish an association.
240 if (!sctp_sstate(sk, ESTABLISHED) && !sctp_sstate(sk, CLOSING))
243 /* Get the first and the only association from the list. */
244 if (!list_empty(&sctp_sk(sk)->ep->asocs))
245 asoc = list_entry(sctp_sk(sk)->ep->asocs.next,
246 struct sctp_association, asocs);
250 /* Otherwise this is a UDP-style socket. */
251 if (id <= SCTP_ALL_ASSOC)
254 spin_lock_bh(&sctp_assocs_id_lock);
255 asoc = (struct sctp_association *)idr_find(&sctp_assocs_id, (int)id);
256 if (asoc && (asoc->base.sk != sk || asoc->base.dead))
258 spin_unlock_bh(&sctp_assocs_id_lock);
263 /* Look up the transport from an address and an assoc id. If both address and
264 * id are specified, the associations matching the address and the id should be
267 static struct sctp_transport *sctp_addr_id2transport(struct sock *sk,
268 struct sockaddr_storage *addr,
271 struct sctp_association *addr_asoc = NULL, *id_asoc = NULL;
272 struct sctp_af *af = sctp_get_af_specific(addr->ss_family);
273 union sctp_addr *laddr = (union sctp_addr *)addr;
274 struct sctp_transport *transport;
276 if (!af || sctp_verify_addr(sk, laddr, af->sockaddr_len))
279 addr_asoc = sctp_endpoint_lookup_assoc(sctp_sk(sk)->ep,
286 id_asoc = sctp_id2assoc(sk, id);
287 if (id_asoc && (id_asoc != addr_asoc))
290 sctp_get_pf_specific(sk->sk_family)->addr_to_user(sctp_sk(sk),
291 (union sctp_addr *)addr);
296 /* API 3.1.2 bind() - UDP Style Syntax
297 * The syntax of bind() is,
299 * ret = bind(int sd, struct sockaddr *addr, int addrlen);
301 * sd - the socket descriptor returned by socket().
302 * addr - the address structure (struct sockaddr_in or struct
303 * sockaddr_in6 [RFC 2553]),
304 * addr_len - the size of the address structure.
306 static int sctp_bind(struct sock *sk, struct sockaddr *addr, int addr_len)
312 pr_debug("%s: sk:%p, addr:%p, addr_len:%d\n", __func__, sk,
315 /* Disallow binding twice. */
316 if (!sctp_sk(sk)->ep->base.bind_addr.port)
317 retval = sctp_do_bind(sk, (union sctp_addr *)addr,
327 static int sctp_get_port_local(struct sock *, union sctp_addr *);
329 /* Verify this is a valid sockaddr. */
330 static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt,
331 union sctp_addr *addr, int len)
335 /* Check minimum size. */
336 if (len < sizeof (struct sockaddr))
339 if (!opt->pf->af_supported(addr->sa.sa_family, opt))
342 if (addr->sa.sa_family == AF_INET6) {
343 if (len < SIN6_LEN_RFC2133)
345 /* V4 mapped address are really of AF_INET family */
346 if (ipv6_addr_v4mapped(&addr->v6.sin6_addr) &&
347 !opt->pf->af_supported(AF_INET, opt))
351 /* If we get this far, af is valid. */
352 af = sctp_get_af_specific(addr->sa.sa_family);
354 if (len < af->sockaddr_len)
360 static void sctp_auto_asconf_init(struct sctp_sock *sp)
362 struct net *net = sock_net(&sp->inet.sk);
364 if (net->sctp.default_auto_asconf) {
365 spin_lock(&net->sctp.addr_wq_lock);
366 list_add_tail(&sp->auto_asconf_list, &net->sctp.auto_asconf_splist);
367 spin_unlock(&net->sctp.addr_wq_lock);
368 sp->do_auto_asconf = 1;
372 /* Bind a local address either to an endpoint or to an association. */
373 static int sctp_do_bind(struct sock *sk, union sctp_addr *addr, int len)
375 struct net *net = sock_net(sk);
376 struct sctp_sock *sp = sctp_sk(sk);
377 struct sctp_endpoint *ep = sp->ep;
378 struct sctp_bind_addr *bp = &ep->base.bind_addr;
383 /* Common sockaddr verification. */
384 af = sctp_sockaddr_af(sp, addr, len);
386 pr_debug("%s: sk:%p, newaddr:%p, len:%d EINVAL\n",
387 __func__, sk, addr, len);
391 snum = ntohs(addr->v4.sin_port);
393 pr_debug("%s: sk:%p, new addr:%pISc, port:%d, new port:%d, len:%d\n",
394 __func__, sk, &addr->sa, bp->port, snum, len);
396 /* PF specific bind() address verification. */
397 if (!sp->pf->bind_verify(sp, addr))
398 return -EADDRNOTAVAIL;
400 /* We must either be unbound, or bind to the same port.
401 * It's OK to allow 0 ports if we are already bound.
402 * We'll just inhert an already bound port in this case
407 else if (snum != bp->port) {
408 pr_debug("%s: new port %d doesn't match existing port "
409 "%d\n", __func__, snum, bp->port);
414 if (snum && inet_port_requires_bind_service(net, snum) &&
415 !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
418 /* See if the address matches any of the addresses we may have
419 * already bound before checking against other endpoints.
421 if (sctp_bind_addr_match(bp, addr, sp))
424 /* Make sure we are allowed to bind here.
425 * The function sctp_get_port_local() does duplicate address
428 addr->v4.sin_port = htons(snum);
429 if (sctp_get_port_local(sk, addr))
432 /* Refresh ephemeral port. */
434 bp->port = inet_sk(sk)->inet_num;
435 sctp_auto_asconf_init(sp);
438 /* Add the address to the bind address list.
439 * Use GFP_ATOMIC since BHs will be disabled.
441 ret = sctp_add_bind_addr(bp, addr, af->sockaddr_len,
442 SCTP_ADDR_SRC, GFP_ATOMIC);
448 /* Copy back into socket for getsockname() use. */
449 inet_sk(sk)->inet_sport = htons(inet_sk(sk)->inet_num);
450 sp->pf->to_sk_saddr(addr, sk);
455 /* ADDIP Section 4.1.1 Congestion Control of ASCONF Chunks
457 * R1) One and only one ASCONF Chunk MAY be in transit and unacknowledged
458 * at any one time. If a sender, after sending an ASCONF chunk, decides
459 * it needs to transfer another ASCONF Chunk, it MUST wait until the
460 * ASCONF-ACK Chunk returns from the previous ASCONF Chunk before sending a
461 * subsequent ASCONF. Note this restriction binds each side, so at any
462 * time two ASCONF may be in-transit on any given association (one sent
463 * from each endpoint).
465 static int sctp_send_asconf(struct sctp_association *asoc,
466 struct sctp_chunk *chunk)
470 /* If there is an outstanding ASCONF chunk, queue it for later
473 if (asoc->addip_last_asconf) {
474 list_add_tail(&chunk->list, &asoc->addip_chunk_list);
478 /* Hold the chunk until an ASCONF_ACK is received. */
479 sctp_chunk_hold(chunk);
480 retval = sctp_primitive_ASCONF(asoc->base.net, asoc, chunk);
482 sctp_chunk_free(chunk);
484 asoc->addip_last_asconf = chunk;
490 /* Add a list of addresses as bind addresses to local endpoint or
493 * Basically run through each address specified in the addrs/addrcnt
494 * array/length pair, determine if it is IPv6 or IPv4 and call
495 * sctp_do_bind() on it.
497 * If any of them fails, then the operation will be reversed and the
498 * ones that were added will be removed.
500 * Only sctp_setsockopt_bindx() is supposed to call this function.
502 static int sctp_bindx_add(struct sock *sk, struct sockaddr *addrs, int addrcnt)
507 struct sockaddr *sa_addr;
510 pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", __func__, sk,
514 for (cnt = 0; cnt < addrcnt; cnt++) {
515 /* The list may contain either IPv4 or IPv6 address;
516 * determine the address length for walking thru the list.
519 af = sctp_get_af_specific(sa_addr->sa_family);
525 retval = sctp_do_bind(sk, (union sctp_addr *)sa_addr,
528 addr_buf += af->sockaddr_len;
532 /* Failed. Cleanup the ones that have been added */
534 sctp_bindx_rem(sk, addrs, cnt);
542 /* Send an ASCONF chunk with Add IP address parameters to all the peers of the
543 * associations that are part of the endpoint indicating that a list of local
544 * addresses are added to the endpoint.
546 * If any of the addresses is already in the bind address list of the
547 * association, we do not send the chunk for that association. But it will not
548 * affect other associations.
550 * Only sctp_setsockopt_bindx() is supposed to call this function.
552 static int sctp_send_asconf_add_ip(struct sock *sk,
553 struct sockaddr *addrs,
556 struct sctp_sock *sp;
557 struct sctp_endpoint *ep;
558 struct sctp_association *asoc;
559 struct sctp_bind_addr *bp;
560 struct sctp_chunk *chunk;
561 struct sctp_sockaddr_entry *laddr;
562 union sctp_addr *addr;
563 union sctp_addr saveaddr;
573 if (!ep->asconf_enable)
576 pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n",
577 __func__, sk, addrs, addrcnt);
579 list_for_each_entry(asoc, &ep->asocs, asocs) {
580 if (!asoc->peer.asconf_capable)
583 if (asoc->peer.addip_disabled_mask & SCTP_PARAM_ADD_IP)
586 if (!sctp_state(asoc, ESTABLISHED))
589 /* Check if any address in the packed array of addresses is
590 * in the bind address list of the association. If so,
591 * do not send the asconf chunk to its peer, but continue with
592 * other associations.
595 for (i = 0; i < addrcnt; i++) {
597 af = sctp_get_af_specific(addr->v4.sin_family);
603 if (sctp_assoc_lookup_laddr(asoc, addr))
606 addr_buf += af->sockaddr_len;
611 /* Use the first valid address in bind addr list of
612 * association as Address Parameter of ASCONF CHUNK.
614 bp = &asoc->base.bind_addr;
615 p = bp->address_list.next;
616 laddr = list_entry(p, struct sctp_sockaddr_entry, list);
617 chunk = sctp_make_asconf_update_ip(asoc, &laddr->a, addrs,
618 addrcnt, SCTP_PARAM_ADD_IP);
624 /* Add the new addresses to the bind address list with
625 * use_as_src set to 0.
628 for (i = 0; i < addrcnt; i++) {
630 af = sctp_get_af_specific(addr->v4.sin_family);
631 memcpy(&saveaddr, addr, af->sockaddr_len);
632 retval = sctp_add_bind_addr(bp, &saveaddr,
634 SCTP_ADDR_NEW, GFP_ATOMIC);
635 addr_buf += af->sockaddr_len;
637 if (asoc->src_out_of_asoc_ok) {
638 struct sctp_transport *trans;
640 list_for_each_entry(trans,
641 &asoc->peer.transport_addr_list, transports) {
642 trans->cwnd = min(4*asoc->pathmtu, max_t(__u32,
643 2*asoc->pathmtu, 4380));
644 trans->ssthresh = asoc->peer.i.a_rwnd;
645 trans->rto = asoc->rto_initial;
646 sctp_max_rto(asoc, trans);
647 trans->rtt = trans->srtt = trans->rttvar = 0;
648 /* Clear the source and route cache */
649 sctp_transport_route(trans, NULL,
650 sctp_sk(asoc->base.sk));
653 retval = sctp_send_asconf(asoc, chunk);
660 /* Remove a list of addresses from bind addresses list. Do not remove the
663 * Basically run through each address specified in the addrs/addrcnt
664 * array/length pair, determine if it is IPv6 or IPv4 and call
665 * sctp_del_bind() on it.
667 * If any of them fails, then the operation will be reversed and the
668 * ones that were removed will be added back.
670 * At least one address has to be left; if only one address is
671 * available, the operation will return -EBUSY.
673 * Only sctp_setsockopt_bindx() is supposed to call this function.
675 static int sctp_bindx_rem(struct sock *sk, struct sockaddr *addrs, int addrcnt)
677 struct sctp_sock *sp = sctp_sk(sk);
678 struct sctp_endpoint *ep = sp->ep;
680 struct sctp_bind_addr *bp = &ep->base.bind_addr;
683 union sctp_addr *sa_addr;
686 pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n",
687 __func__, sk, addrs, addrcnt);
690 for (cnt = 0; cnt < addrcnt; cnt++) {
691 /* If the bind address list is empty or if there is only one
692 * bind address, there is nothing more to be removed (we need
693 * at least one address here).
695 if (list_empty(&bp->address_list) ||
696 (sctp_list_single_entry(&bp->address_list))) {
702 af = sctp_get_af_specific(sa_addr->sa.sa_family);
708 if (!af->addr_valid(sa_addr, sp, NULL)) {
709 retval = -EADDRNOTAVAIL;
713 if (sa_addr->v4.sin_port &&
714 sa_addr->v4.sin_port != htons(bp->port)) {
719 if (!sa_addr->v4.sin_port)
720 sa_addr->v4.sin_port = htons(bp->port);
722 /* FIXME - There is probably a need to check if sk->sk_saddr and
723 * sk->sk_rcv_addr are currently set to one of the addresses to
724 * be removed. This is something which needs to be looked into
725 * when we are fixing the outstanding issues with multi-homing
726 * socket routing and failover schemes. Refer to comments in
727 * sctp_do_bind(). -daisy
729 retval = sctp_del_bind_addr(bp, sa_addr);
731 addr_buf += af->sockaddr_len;
734 /* Failed. Add the ones that has been removed back */
736 sctp_bindx_add(sk, addrs, cnt);
744 /* Send an ASCONF chunk with Delete IP address parameters to all the peers of
745 * the associations that are part of the endpoint indicating that a list of
746 * local addresses are removed from the endpoint.
748 * If any of the addresses is already in the bind address list of the
749 * association, we do not send the chunk for that association. But it will not
750 * affect other associations.
752 * Only sctp_setsockopt_bindx() is supposed to call this function.
754 static int sctp_send_asconf_del_ip(struct sock *sk,
755 struct sockaddr *addrs,
758 struct sctp_sock *sp;
759 struct sctp_endpoint *ep;
760 struct sctp_association *asoc;
761 struct sctp_transport *transport;
762 struct sctp_bind_addr *bp;
763 struct sctp_chunk *chunk;
764 union sctp_addr *laddr;
767 struct sctp_sockaddr_entry *saddr;
776 if (!ep->asconf_enable)
779 pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n",
780 __func__, sk, addrs, addrcnt);
782 list_for_each_entry(asoc, &ep->asocs, asocs) {
784 if (!asoc->peer.asconf_capable)
787 if (asoc->peer.addip_disabled_mask & SCTP_PARAM_DEL_IP)
790 if (!sctp_state(asoc, ESTABLISHED))
793 /* Check if any address in the packed array of addresses is
794 * not present in the bind address list of the association.
795 * If so, do not send the asconf chunk to its peer, but
796 * continue with other associations.
799 for (i = 0; i < addrcnt; i++) {
801 af = sctp_get_af_specific(laddr->v4.sin_family);
807 if (!sctp_assoc_lookup_laddr(asoc, laddr))
810 addr_buf += af->sockaddr_len;
815 /* Find one address in the association's bind address list
816 * that is not in the packed array of addresses. This is to
817 * make sure that we do not delete all the addresses in the
820 bp = &asoc->base.bind_addr;
821 laddr = sctp_find_unmatch_addr(bp, (union sctp_addr *)addrs,
823 if ((laddr == NULL) && (addrcnt == 1)) {
824 if (asoc->asconf_addr_del_pending)
826 asoc->asconf_addr_del_pending =
827 kzalloc(sizeof(union sctp_addr), GFP_ATOMIC);
828 if (asoc->asconf_addr_del_pending == NULL) {
832 asoc->asconf_addr_del_pending->sa.sa_family =
834 asoc->asconf_addr_del_pending->v4.sin_port =
836 if (addrs->sa_family == AF_INET) {
837 struct sockaddr_in *sin;
839 sin = (struct sockaddr_in *)addrs;
840 asoc->asconf_addr_del_pending->v4.sin_addr.s_addr = sin->sin_addr.s_addr;
841 } else if (addrs->sa_family == AF_INET6) {
842 struct sockaddr_in6 *sin6;
844 sin6 = (struct sockaddr_in6 *)addrs;
845 asoc->asconf_addr_del_pending->v6.sin6_addr = sin6->sin6_addr;
848 pr_debug("%s: keep the last address asoc:%p %pISc at %p\n",
849 __func__, asoc, &asoc->asconf_addr_del_pending->sa,
850 asoc->asconf_addr_del_pending);
852 asoc->src_out_of_asoc_ok = 1;
860 /* We do not need RCU protection throughout this loop
861 * because this is done under a socket lock from the
864 chunk = sctp_make_asconf_update_ip(asoc, laddr, addrs, addrcnt,
872 /* Reset use_as_src flag for the addresses in the bind address
873 * list that are to be deleted.
876 for (i = 0; i < addrcnt; i++) {
878 af = sctp_get_af_specific(laddr->v4.sin_family);
879 list_for_each_entry(saddr, &bp->address_list, list) {
880 if (sctp_cmp_addr_exact(&saddr->a, laddr))
881 saddr->state = SCTP_ADDR_DEL;
883 addr_buf += af->sockaddr_len;
886 /* Update the route and saddr entries for all the transports
887 * as some of the addresses in the bind address list are
888 * about to be deleted and cannot be used as source addresses.
890 list_for_each_entry(transport, &asoc->peer.transport_addr_list,
892 sctp_transport_route(transport, NULL,
893 sctp_sk(asoc->base.sk));
897 /* We don't need to transmit ASCONF */
899 retval = sctp_send_asconf(asoc, chunk);
905 /* set addr events to assocs in the endpoint. ep and addr_wq must be locked */
906 int sctp_asconf_mgmt(struct sctp_sock *sp, struct sctp_sockaddr_entry *addrw)
908 struct sock *sk = sctp_opt2sk(sp);
909 union sctp_addr *addr;
912 /* It is safe to write port space in caller. */
914 addr->v4.sin_port = htons(sp->ep->base.bind_addr.port);
915 af = sctp_get_af_specific(addr->sa.sa_family);
918 if (sctp_verify_addr(sk, addr, af->sockaddr_len))
921 if (addrw->state == SCTP_ADDR_NEW)
922 return sctp_send_asconf_add_ip(sk, (struct sockaddr *)addr, 1);
924 return sctp_send_asconf_del_ip(sk, (struct sockaddr *)addr, 1);
927 /* Helper for tunneling sctp_bindx() requests through sctp_setsockopt()
930 * int sctp_bindx(int sd, struct sockaddr *addrs, int addrcnt,
933 * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses.
934 * If the sd is an IPv6 socket, the addresses passed can either be IPv4
937 * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see
938 * Section 3.1.2 for this usage.
940 * addrs is a pointer to an array of one or more socket addresses. Each
941 * address is contained in its appropriate structure (i.e. struct
942 * sockaddr_in or struct sockaddr_in6) the family of the address type
943 * must be used to distinguish the address length (note that this
944 * representation is termed a "packed array" of addresses). The caller
945 * specifies the number of addresses in the array with addrcnt.
947 * On success, sctp_bindx() returns 0. On failure, sctp_bindx() returns
948 * -1, and sets errno to the appropriate error code.
950 * For SCTP, the port given in each socket address must be the same, or
951 * sctp_bindx() will fail, setting errno to EINVAL.
953 * The flags parameter is formed from the bitwise OR of zero or more of
954 * the following currently defined flags:
956 * SCTP_BINDX_ADD_ADDR
958 * SCTP_BINDX_REM_ADDR
960 * SCTP_BINDX_ADD_ADDR directs SCTP to add the given addresses to the
961 * association, and SCTP_BINDX_REM_ADDR directs SCTP to remove the given
962 * addresses from the association. The two flags are mutually exclusive;
963 * if both are given, sctp_bindx() will fail with EINVAL. A caller may
964 * not remove all addresses from an association; sctp_bindx() will
965 * reject such an attempt with EINVAL.
967 * An application can use sctp_bindx(SCTP_BINDX_ADD_ADDR) to associate
968 * additional addresses with an endpoint after calling bind(). Or use
969 * sctp_bindx(SCTP_BINDX_REM_ADDR) to remove some addresses a listening
970 * socket is associated with so that no new association accepted will be
971 * associated with those addresses. If the endpoint supports dynamic
972 * address a SCTP_BINDX_REM_ADDR or SCTP_BINDX_ADD_ADDR may cause a
973 * endpoint to send the appropriate message to the peer to change the
974 * peers address lists.
976 * Adding and removing addresses from a connected association is
977 * optional functionality. Implementations that do not support this
978 * functionality should return EOPNOTSUPP.
980 * Basically do nothing but copying the addresses from user to kernel
981 * land and invoking either sctp_bindx_add() or sctp_bindx_rem() on the sk.
982 * This is used for tunneling the sctp_bindx() request through sctp_setsockopt()
985 * On exit there is no need to do sockfd_put(), sys_setsockopt() does
988 * sk The sk of the socket
989 * addrs The pointer to the addresses
990 * addrssize Size of the addrs buffer
991 * op Operation to perform (add or remove, see the flags of
994 * Returns 0 if ok, <0 errno code on error.
996 static int sctp_setsockopt_bindx(struct sock *sk, struct sockaddr *addrs,
997 int addrs_size, int op)
1002 struct sockaddr *sa_addr;
1003 void *addr_buf = addrs;
1006 pr_debug("%s: sk:%p addrs:%p addrs_size:%d opt:%d\n",
1007 __func__, sk, addr_buf, addrs_size, op);
1009 if (unlikely(addrs_size <= 0))
1012 /* Walk through the addrs buffer and count the number of addresses. */
1013 while (walk_size < addrs_size) {
1014 if (walk_size + sizeof(sa_family_t) > addrs_size)
1018 af = sctp_get_af_specific(sa_addr->sa_family);
1020 /* If the address family is not supported or if this address
1021 * causes the address buffer to overflow return EINVAL.
1023 if (!af || (walk_size + af->sockaddr_len) > addrs_size)
1026 addr_buf += af->sockaddr_len;
1027 walk_size += af->sockaddr_len;
1032 case SCTP_BINDX_ADD_ADDR:
1033 /* Allow security module to validate bindx addresses. */
1034 err = security_sctp_bind_connect(sk, SCTP_SOCKOPT_BINDX_ADD,
1038 err = sctp_bindx_add(sk, addrs, addrcnt);
1041 return sctp_send_asconf_add_ip(sk, addrs, addrcnt);
1042 case SCTP_BINDX_REM_ADDR:
1043 err = sctp_bindx_rem(sk, addrs, addrcnt);
1046 return sctp_send_asconf_del_ip(sk, addrs, addrcnt);
1053 static int sctp_bind_add(struct sock *sk, struct sockaddr *addrs,
1059 err = sctp_setsockopt_bindx(sk, addrs, addrlen, SCTP_BINDX_ADD_ADDR);
1064 static int sctp_connect_new_asoc(struct sctp_endpoint *ep,
1065 const union sctp_addr *daddr,
1066 const struct sctp_initmsg *init,
1067 struct sctp_transport **tp)
1069 struct sctp_association *asoc;
1070 struct sock *sk = ep->base.sk;
1071 struct net *net = sock_net(sk);
1072 enum sctp_scope scope;
1075 if (sctp_endpoint_is_peeled_off(ep, daddr))
1076 return -EADDRNOTAVAIL;
1078 if (!ep->base.bind_addr.port) {
1079 if (sctp_autobind(sk))
1082 if (inet_port_requires_bind_service(net, ep->base.bind_addr.port) &&
1083 !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
1087 scope = sctp_scope(daddr);
1088 asoc = sctp_association_new(ep, sk, scope, GFP_KERNEL);
1092 err = sctp_assoc_set_bind_addr_from_ep(asoc, scope, GFP_KERNEL);
1096 *tp = sctp_assoc_add_peer(asoc, daddr, GFP_KERNEL, SCTP_UNKNOWN);
1105 if (init->sinit_num_ostreams) {
1106 __u16 outcnt = init->sinit_num_ostreams;
1108 asoc->c.sinit_num_ostreams = outcnt;
1109 /* outcnt has been changed, need to re-init stream */
1110 err = sctp_stream_init(&asoc->stream, outcnt, 0, GFP_KERNEL);
1115 if (init->sinit_max_instreams)
1116 asoc->c.sinit_max_instreams = init->sinit_max_instreams;
1118 if (init->sinit_max_attempts)
1119 asoc->max_init_attempts = init->sinit_max_attempts;
1121 if (init->sinit_max_init_timeo)
1122 asoc->max_init_timeo =
1123 msecs_to_jiffies(init->sinit_max_init_timeo);
1127 sctp_association_free(asoc);
1131 static int sctp_connect_add_peer(struct sctp_association *asoc,
1132 union sctp_addr *daddr, int addr_len)
1134 struct sctp_endpoint *ep = asoc->ep;
1135 struct sctp_association *old;
1136 struct sctp_transport *t;
1139 err = sctp_verify_addr(ep->base.sk, daddr, addr_len);
1143 old = sctp_endpoint_lookup_assoc(ep, daddr, &t);
1144 if (old && old != asoc)
1145 return old->state >= SCTP_STATE_ESTABLISHED ? -EISCONN
1148 if (sctp_endpoint_is_peeled_off(ep, daddr))
1149 return -EADDRNOTAVAIL;
1151 t = sctp_assoc_add_peer(asoc, daddr, GFP_KERNEL, SCTP_UNKNOWN);
1158 /* __sctp_connect(struct sock* sk, struct sockaddr *kaddrs, int addrs_size)
1160 * Common routine for handling connect() and sctp_connectx().
1161 * Connect will come in with just a single address.
1163 static int __sctp_connect(struct sock *sk, struct sockaddr *kaddrs,
1164 int addrs_size, int flags, sctp_assoc_t *assoc_id)
1166 struct sctp_sock *sp = sctp_sk(sk);
1167 struct sctp_endpoint *ep = sp->ep;
1168 struct sctp_transport *transport;
1169 struct sctp_association *asoc;
1170 void *addr_buf = kaddrs;
1171 union sctp_addr *daddr;
1176 if (sctp_sstate(sk, ESTABLISHED) || sctp_sstate(sk, CLOSING) ||
1177 (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING)))
1181 af = sctp_get_af_specific(daddr->sa.sa_family);
1182 if (!af || af->sockaddr_len > addrs_size)
1185 err = sctp_verify_addr(sk, daddr, af->sockaddr_len);
1189 asoc = sctp_endpoint_lookup_assoc(ep, daddr, &transport);
1191 return asoc->state >= SCTP_STATE_ESTABLISHED ? -EISCONN
1194 err = sctp_connect_new_asoc(ep, daddr, NULL, &transport);
1197 asoc = transport->asoc;
1199 addr_buf += af->sockaddr_len;
1200 walk_size = af->sockaddr_len;
1201 while (walk_size < addrs_size) {
1203 if (walk_size + sizeof(sa_family_t) > addrs_size)
1207 af = sctp_get_af_specific(daddr->sa.sa_family);
1208 if (!af || af->sockaddr_len + walk_size > addrs_size)
1211 if (asoc->peer.port != ntohs(daddr->v4.sin_port))
1214 err = sctp_connect_add_peer(asoc, daddr, af->sockaddr_len);
1218 addr_buf += af->sockaddr_len;
1219 walk_size += af->sockaddr_len;
1222 /* In case the user of sctp_connectx() wants an association
1223 * id back, assign one now.
1226 err = sctp_assoc_set_id(asoc, GFP_KERNEL);
1231 err = sctp_primitive_ASSOCIATE(sock_net(sk), asoc, NULL);
1235 /* Initialize sk's dport and daddr for getpeername() */
1236 inet_sk(sk)->inet_dport = htons(asoc->peer.port);
1237 sp->pf->to_sk_daddr(daddr, sk);
1241 *assoc_id = asoc->assoc_id;
1243 timeo = sock_sndtimeo(sk, flags & O_NONBLOCK);
1244 return sctp_wait_for_connect(asoc, &timeo);
1247 pr_debug("%s: took out_free path with asoc:%p kaddrs:%p err:%d\n",
1248 __func__, asoc, kaddrs, err);
1249 sctp_association_free(asoc);
1253 /* Helper for tunneling sctp_connectx() requests through sctp_setsockopt()
1256 * int sctp_connectx(int sd, struct sockaddr *addrs, int addrcnt,
1257 * sctp_assoc_t *asoc);
1259 * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses.
1260 * If the sd is an IPv6 socket, the addresses passed can either be IPv4
1261 * or IPv6 addresses.
1263 * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see
1264 * Section 3.1.2 for this usage.
1266 * addrs is a pointer to an array of one or more socket addresses. Each
1267 * address is contained in its appropriate structure (i.e. struct
1268 * sockaddr_in or struct sockaddr_in6) the family of the address type
1269 * must be used to distengish the address length (note that this
1270 * representation is termed a "packed array" of addresses). The caller
1271 * specifies the number of addresses in the array with addrcnt.
1273 * On success, sctp_connectx() returns 0. It also sets the assoc_id to
1274 * the association id of the new association. On failure, sctp_connectx()
1275 * returns -1, and sets errno to the appropriate error code. The assoc_id
1276 * is not touched by the kernel.
1278 * For SCTP, the port given in each socket address must be the same, or
1279 * sctp_connectx() will fail, setting errno to EINVAL.
1281 * An application can use sctp_connectx to initiate an association with
1282 * an endpoint that is multi-homed. Much like sctp_bindx() this call
1283 * allows a caller to specify multiple addresses at which a peer can be
1284 * reached. The way the SCTP stack uses the list of addresses to set up
1285 * the association is implementation dependent. This function only
1286 * specifies that the stack will try to make use of all the addresses in
1287 * the list when needed.
1289 * Note that the list of addresses passed in is only used for setting up
1290 * the association. It does not necessarily equal the set of addresses
1291 * the peer uses for the resulting association. If the caller wants to
1292 * find out the set of peer addresses, it must use sctp_getpaddrs() to
1293 * retrieve them after the association has been set up.
1295 * Basically do nothing but copying the addresses from user to kernel
1296 * land and invoking either sctp_connectx(). This is used for tunneling
1297 * the sctp_connectx() request through sctp_setsockopt() from userspace.
1299 * On exit there is no need to do sockfd_put(), sys_setsockopt() does
1302 * sk The sk of the socket
1303 * addrs The pointer to the addresses
1304 * addrssize Size of the addrs buffer
1306 * Returns >=0 if ok, <0 errno code on error.
1308 static int __sctp_setsockopt_connectx(struct sock *sk, struct sockaddr *kaddrs,
1309 int addrs_size, sctp_assoc_t *assoc_id)
1311 int err = 0, flags = 0;
1313 pr_debug("%s: sk:%p addrs:%p addrs_size:%d\n",
1314 __func__, sk, kaddrs, addrs_size);
1316 /* make sure the 1st addr's sa_family is accessible later */
1317 if (unlikely(addrs_size < sizeof(sa_family_t)))
1320 /* Allow security module to validate connectx addresses. */
1321 err = security_sctp_bind_connect(sk, SCTP_SOCKOPT_CONNECTX,
1322 (struct sockaddr *)kaddrs,
1327 /* in-kernel sockets don't generally have a file allocated to them
1328 * if all they do is call sock_create_kern().
1330 if (sk->sk_socket->file)
1331 flags = sk->sk_socket->file->f_flags;
1333 return __sctp_connect(sk, kaddrs, addrs_size, flags, assoc_id);
1337 * This is an older interface. It's kept for backward compatibility
1338 * to the option that doesn't provide association id.
1340 static int sctp_setsockopt_connectx_old(struct sock *sk,
1341 struct sockaddr *kaddrs,
1344 return __sctp_setsockopt_connectx(sk, kaddrs, addrs_size, NULL);
1348 * New interface for the API. The since the API is done with a socket
1349 * option, to make it simple we feed back the association id is as a return
1350 * indication to the call. Error is always negative and association id is
1353 static int sctp_setsockopt_connectx(struct sock *sk,
1354 struct sockaddr *kaddrs,
1357 sctp_assoc_t assoc_id = 0;
1360 err = __sctp_setsockopt_connectx(sk, kaddrs, addrs_size, &assoc_id);
1369 * New (hopefully final) interface for the API.
1370 * We use the sctp_getaddrs_old structure so that use-space library
1371 * can avoid any unnecessary allocations. The only different part
1372 * is that we store the actual length of the address buffer into the
1373 * addrs_num structure member. That way we can re-use the existing
1376 #ifdef CONFIG_COMPAT
1377 struct compat_sctp_getaddrs_old {
1378 sctp_assoc_t assoc_id;
1380 compat_uptr_t addrs; /* struct sockaddr * */
1384 static int sctp_getsockopt_connectx3(struct sock *sk, int len,
1385 char __user *optval,
1388 struct sctp_getaddrs_old param;
1389 sctp_assoc_t assoc_id = 0;
1390 struct sockaddr *kaddrs;
1393 #ifdef CONFIG_COMPAT
1394 if (in_compat_syscall()) {
1395 struct compat_sctp_getaddrs_old param32;
1397 if (len < sizeof(param32))
1399 if (copy_from_user(¶m32, optval, sizeof(param32)))
1402 param.assoc_id = param32.assoc_id;
1403 param.addr_num = param32.addr_num;
1404 param.addrs = compat_ptr(param32.addrs);
1408 if (len < sizeof(param))
1410 if (copy_from_user(¶m, optval, sizeof(param)))
1414 kaddrs = memdup_user(param.addrs, param.addr_num);
1416 return PTR_ERR(kaddrs);
1418 err = __sctp_setsockopt_connectx(sk, kaddrs, param.addr_num, &assoc_id);
1420 if (err == 0 || err == -EINPROGRESS) {
1421 if (copy_to_user(optval, &assoc_id, sizeof(assoc_id)))
1423 if (put_user(sizeof(assoc_id), optlen))
1430 /* API 3.1.4 close() - UDP Style Syntax
1431 * Applications use close() to perform graceful shutdown (as described in
1432 * Section 10.1 of [SCTP]) on ALL the associations currently represented
1433 * by a UDP-style socket.
1437 * ret = close(int sd);
1439 * sd - the socket descriptor of the associations to be closed.
1441 * To gracefully shutdown a specific association represented by the
1442 * UDP-style socket, an application should use the sendmsg() call,
1443 * passing no user data, but including the appropriate flag in the
1444 * ancillary data (see Section xxxx).
1446 * If sd in the close() call is a branched-off socket representing only
1447 * one association, the shutdown is performed on that association only.
1449 * 4.1.6 close() - TCP Style Syntax
1451 * Applications use close() to gracefully close down an association.
1455 * int close(int sd);
1457 * sd - the socket descriptor of the association to be closed.
1459 * After an application calls close() on a socket descriptor, no further
1460 * socket operations will succeed on that descriptor.
1462 * API 7.1.4 SO_LINGER
1464 * An application using the TCP-style socket can use this option to
1465 * perform the SCTP ABORT primitive. The linger option structure is:
1468 * int l_onoff; // option on/off
1469 * int l_linger; // linger time
1472 * To enable the option, set l_onoff to 1. If the l_linger value is set
1473 * to 0, calling close() is the same as the ABORT primitive. If the
1474 * value is set to a negative value, the setsockopt() call will return
1475 * an error. If the value is set to a positive value linger_time, the
1476 * close() can be blocked for at most linger_time ms. If the graceful
1477 * shutdown phase does not finish during this period, close() will
1478 * return but the graceful shutdown phase continues in the system.
1480 static void sctp_close(struct sock *sk, long timeout)
1482 struct net *net = sock_net(sk);
1483 struct sctp_endpoint *ep;
1484 struct sctp_association *asoc;
1485 struct list_head *pos, *temp;
1486 unsigned int data_was_unread;
1488 pr_debug("%s: sk:%p, timeout:%ld\n", __func__, sk, timeout);
1490 lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
1491 sk->sk_shutdown = SHUTDOWN_MASK;
1492 inet_sk_set_state(sk, SCTP_SS_CLOSING);
1494 ep = sctp_sk(sk)->ep;
1496 /* Clean up any skbs sitting on the receive queue. */
1497 data_was_unread = sctp_queue_purge_ulpevents(&sk->sk_receive_queue);
1498 data_was_unread += sctp_queue_purge_ulpevents(&sctp_sk(sk)->pd_lobby);
1500 /* Walk all associations on an endpoint. */
1501 list_for_each_safe(pos, temp, &ep->asocs) {
1502 asoc = list_entry(pos, struct sctp_association, asocs);
1504 if (sctp_style(sk, TCP)) {
1505 /* A closed association can still be in the list if
1506 * it belongs to a TCP-style listening socket that is
1507 * not yet accepted. If so, free it. If not, send an
1508 * ABORT or SHUTDOWN based on the linger options.
1510 if (sctp_state(asoc, CLOSED)) {
1511 sctp_association_free(asoc);
1516 if (data_was_unread || !skb_queue_empty(&asoc->ulpq.lobby) ||
1517 !skb_queue_empty(&asoc->ulpq.reasm) ||
1518 !skb_queue_empty(&asoc->ulpq.reasm_uo) ||
1519 (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime)) {
1520 struct sctp_chunk *chunk;
1522 chunk = sctp_make_abort_user(asoc, NULL, 0);
1523 sctp_primitive_ABORT(net, asoc, chunk);
1525 sctp_primitive_SHUTDOWN(net, asoc, NULL);
1528 /* On a TCP-style socket, block for at most linger_time if set. */
1529 if (sctp_style(sk, TCP) && timeout)
1530 sctp_wait_for_close(sk, timeout);
1532 /* This will run the backlog queue. */
1535 /* Supposedly, no process has access to the socket, but
1536 * the net layers still may.
1537 * Also, sctp_destroy_sock() needs to be called with addr_wq_lock
1538 * held and that should be grabbed before socket lock.
1540 spin_lock_bh(&net->sctp.addr_wq_lock);
1541 bh_lock_sock_nested(sk);
1543 /* Hold the sock, since sk_common_release() will put sock_put()
1544 * and we have just a little more cleanup.
1547 sk_common_release(sk);
1550 spin_unlock_bh(&net->sctp.addr_wq_lock);
1554 SCTP_DBG_OBJCNT_DEC(sock);
1557 /* Handle EPIPE error. */
1558 static int sctp_error(struct sock *sk, int flags, int err)
1561 err = sock_error(sk) ? : -EPIPE;
1562 if (err == -EPIPE && !(flags & MSG_NOSIGNAL))
1563 send_sig(SIGPIPE, current, 0);
1567 /* API 3.1.3 sendmsg() - UDP Style Syntax
1569 * An application uses sendmsg() and recvmsg() calls to transmit data to
1570 * and receive data from its peer.
1572 * ssize_t sendmsg(int socket, const struct msghdr *message,
1575 * socket - the socket descriptor of the endpoint.
1576 * message - pointer to the msghdr structure which contains a single
1577 * user message and possibly some ancillary data.
1579 * See Section 5 for complete description of the data
1582 * flags - flags sent or received with the user message, see Section
1583 * 5 for complete description of the flags.
1585 * Note: This function could use a rewrite especially when explicit
1586 * connect support comes in.
1588 /* BUG: We do not implement the equivalent of sk_stream_wait_memory(). */
1590 static int sctp_msghdr_parse(const struct msghdr *msg,
1591 struct sctp_cmsgs *cmsgs);
1593 static int sctp_sendmsg_parse(struct sock *sk, struct sctp_cmsgs *cmsgs,
1594 struct sctp_sndrcvinfo *srinfo,
1595 const struct msghdr *msg, size_t msg_len)
1600 if (sctp_sstate(sk, LISTENING) && sctp_style(sk, TCP))
1603 if (msg_len > sk->sk_sndbuf)
1606 memset(cmsgs, 0, sizeof(*cmsgs));
1607 err = sctp_msghdr_parse(msg, cmsgs);
1609 pr_debug("%s: msghdr parse err:%x\n", __func__, err);
1613 memset(srinfo, 0, sizeof(*srinfo));
1614 if (cmsgs->srinfo) {
1615 srinfo->sinfo_stream = cmsgs->srinfo->sinfo_stream;
1616 srinfo->sinfo_flags = cmsgs->srinfo->sinfo_flags;
1617 srinfo->sinfo_ppid = cmsgs->srinfo->sinfo_ppid;
1618 srinfo->sinfo_context = cmsgs->srinfo->sinfo_context;
1619 srinfo->sinfo_assoc_id = cmsgs->srinfo->sinfo_assoc_id;
1620 srinfo->sinfo_timetolive = cmsgs->srinfo->sinfo_timetolive;
1624 srinfo->sinfo_stream = cmsgs->sinfo->snd_sid;
1625 srinfo->sinfo_flags = cmsgs->sinfo->snd_flags;
1626 srinfo->sinfo_ppid = cmsgs->sinfo->snd_ppid;
1627 srinfo->sinfo_context = cmsgs->sinfo->snd_context;
1628 srinfo->sinfo_assoc_id = cmsgs->sinfo->snd_assoc_id;
1631 if (cmsgs->prinfo) {
1632 srinfo->sinfo_timetolive = cmsgs->prinfo->pr_value;
1633 SCTP_PR_SET_POLICY(srinfo->sinfo_flags,
1634 cmsgs->prinfo->pr_policy);
1637 sflags = srinfo->sinfo_flags;
1638 if (!sflags && msg_len)
1641 if (sctp_style(sk, TCP) && (sflags & (SCTP_EOF | SCTP_ABORT)))
1644 if (((sflags & SCTP_EOF) && msg_len > 0) ||
1645 (!(sflags & (SCTP_EOF | SCTP_ABORT)) && msg_len == 0))
1648 if ((sflags & SCTP_ADDR_OVER) && !msg->msg_name)
1654 static int sctp_sendmsg_new_asoc(struct sock *sk, __u16 sflags,
1655 struct sctp_cmsgs *cmsgs,
1656 union sctp_addr *daddr,
1657 struct sctp_transport **tp)
1659 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
1660 struct sctp_association *asoc;
1661 struct cmsghdr *cmsg;
1662 __be32 flowinfo = 0;
1668 if (sflags & (SCTP_EOF | SCTP_ABORT))
1671 if (sctp_style(sk, TCP) && (sctp_sstate(sk, ESTABLISHED) ||
1672 sctp_sstate(sk, CLOSING)))
1673 return -EADDRNOTAVAIL;
1675 /* Label connection socket for first association 1-to-many
1676 * style for client sequence socket()->sendmsg(). This
1677 * needs to be done before sctp_assoc_add_peer() as that will
1678 * set up the initial packet that needs to account for any
1679 * security ip options (CIPSO/CALIPSO) added to the packet.
1681 af = sctp_get_af_specific(daddr->sa.sa_family);
1684 err = security_sctp_bind_connect(sk, SCTP_SENDMSG_CONNECT,
1685 (struct sockaddr *)daddr,
1690 err = sctp_connect_new_asoc(ep, daddr, cmsgs->init, tp);
1695 if (!cmsgs->addrs_msg)
1698 if (daddr->sa.sa_family == AF_INET6)
1699 flowinfo = daddr->v6.sin6_flowinfo;
1701 /* sendv addr list parse */
1702 for_each_cmsghdr(cmsg, cmsgs->addrs_msg) {
1703 union sctp_addr _daddr;
1706 if (cmsg->cmsg_level != IPPROTO_SCTP ||
1707 (cmsg->cmsg_type != SCTP_DSTADDRV4 &&
1708 cmsg->cmsg_type != SCTP_DSTADDRV6))
1712 memset(daddr, 0, sizeof(*daddr));
1713 dlen = cmsg->cmsg_len - sizeof(struct cmsghdr);
1714 if (cmsg->cmsg_type == SCTP_DSTADDRV4) {
1715 if (dlen < sizeof(struct in_addr)) {
1720 dlen = sizeof(struct in_addr);
1721 daddr->v4.sin_family = AF_INET;
1722 daddr->v4.sin_port = htons(asoc->peer.port);
1723 memcpy(&daddr->v4.sin_addr, CMSG_DATA(cmsg), dlen);
1725 if (dlen < sizeof(struct in6_addr)) {
1730 dlen = sizeof(struct in6_addr);
1731 daddr->v6.sin6_flowinfo = flowinfo;
1732 daddr->v6.sin6_family = AF_INET6;
1733 daddr->v6.sin6_port = htons(asoc->peer.port);
1734 memcpy(&daddr->v6.sin6_addr, CMSG_DATA(cmsg), dlen);
1737 err = sctp_connect_add_peer(asoc, daddr, sizeof(*daddr));
1745 sctp_association_free(asoc);
1749 static int sctp_sendmsg_check_sflags(struct sctp_association *asoc,
1750 __u16 sflags, struct msghdr *msg,
1753 struct sock *sk = asoc->base.sk;
1754 struct net *net = sock_net(sk);
1756 if (sctp_state(asoc, CLOSED) && sctp_style(sk, TCP))
1759 if ((sflags & SCTP_SENDALL) && sctp_style(sk, UDP) &&
1760 !sctp_state(asoc, ESTABLISHED))
1763 if (sflags & SCTP_EOF) {
1764 pr_debug("%s: shutting down association:%p\n", __func__, asoc);
1765 sctp_primitive_SHUTDOWN(net, asoc, NULL);
1770 if (sflags & SCTP_ABORT) {
1771 struct sctp_chunk *chunk;
1773 chunk = sctp_make_abort_user(asoc, msg, msg_len);
1777 pr_debug("%s: aborting association:%p\n", __func__, asoc);
1778 sctp_primitive_ABORT(net, asoc, chunk);
1779 iov_iter_revert(&msg->msg_iter, msg_len);
1787 static int sctp_sendmsg_to_asoc(struct sctp_association *asoc,
1788 struct msghdr *msg, size_t msg_len,
1789 struct sctp_transport *transport,
1790 struct sctp_sndrcvinfo *sinfo)
1792 struct sock *sk = asoc->base.sk;
1793 struct sctp_sock *sp = sctp_sk(sk);
1794 struct net *net = sock_net(sk);
1795 struct sctp_datamsg *datamsg;
1796 bool wait_connect = false;
1797 struct sctp_chunk *chunk;
1801 if (sinfo->sinfo_stream >= asoc->stream.outcnt) {
1806 if (unlikely(!SCTP_SO(&asoc->stream, sinfo->sinfo_stream)->ext)) {
1807 err = sctp_stream_init_ext(&asoc->stream, sinfo->sinfo_stream);
1812 if (sp->disable_fragments && msg_len > asoc->frag_point) {
1817 if (asoc->pmtu_pending) {
1818 if (sp->param_flags & SPP_PMTUD_ENABLE)
1819 sctp_assoc_sync_pmtu(asoc);
1820 asoc->pmtu_pending = 0;
1823 if (sctp_wspace(asoc) < (int)msg_len)
1824 sctp_prsctp_prune(asoc, sinfo, msg_len - sctp_wspace(asoc));
1826 if (sk_under_memory_pressure(sk))
1829 if (sctp_wspace(asoc) <= 0 || !sk_wmem_schedule(sk, msg_len)) {
1830 timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT);
1831 err = sctp_wait_for_sndbuf(asoc, &timeo, msg_len);
1836 if (sctp_state(asoc, CLOSED)) {
1837 err = sctp_primitive_ASSOCIATE(net, asoc, NULL);
1841 if (asoc->ep->intl_enable) {
1842 timeo = sock_sndtimeo(sk, 0);
1843 err = sctp_wait_for_connect(asoc, &timeo);
1849 wait_connect = true;
1852 pr_debug("%s: we associated primitively\n", __func__);
1855 datamsg = sctp_datamsg_from_user(asoc, sinfo, &msg->msg_iter);
1856 if (IS_ERR(datamsg)) {
1857 err = PTR_ERR(datamsg);
1861 asoc->force_delay = !!(msg->msg_flags & MSG_MORE);
1863 list_for_each_entry(chunk, &datamsg->chunks, frag_list) {
1864 sctp_chunk_hold(chunk);
1865 sctp_set_owner_w(chunk);
1866 chunk->transport = transport;
1869 err = sctp_primitive_SEND(net, asoc, datamsg);
1871 sctp_datamsg_free(datamsg);
1875 pr_debug("%s: we sent primitively\n", __func__);
1877 sctp_datamsg_put(datamsg);
1879 if (unlikely(wait_connect)) {
1880 timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT);
1881 sctp_wait_for_connect(asoc, &timeo);
1890 static union sctp_addr *sctp_sendmsg_get_daddr(struct sock *sk,
1891 const struct msghdr *msg,
1892 struct sctp_cmsgs *cmsgs)
1894 union sctp_addr *daddr = NULL;
1897 if (!sctp_style(sk, UDP_HIGH_BANDWIDTH) && msg->msg_name) {
1898 int len = msg->msg_namelen;
1900 if (len > sizeof(*daddr))
1901 len = sizeof(*daddr);
1903 daddr = (union sctp_addr *)msg->msg_name;
1905 err = sctp_verify_addr(sk, daddr, len);
1907 return ERR_PTR(err);
1913 static void sctp_sendmsg_update_sinfo(struct sctp_association *asoc,
1914 struct sctp_sndrcvinfo *sinfo,
1915 struct sctp_cmsgs *cmsgs)
1917 if (!cmsgs->srinfo && !cmsgs->sinfo) {
1918 sinfo->sinfo_stream = asoc->default_stream;
1919 sinfo->sinfo_ppid = asoc->default_ppid;
1920 sinfo->sinfo_context = asoc->default_context;
1921 sinfo->sinfo_assoc_id = sctp_assoc2id(asoc);
1924 sinfo->sinfo_flags = asoc->default_flags;
1927 if (!cmsgs->srinfo && !cmsgs->prinfo)
1928 sinfo->sinfo_timetolive = asoc->default_timetolive;
1930 if (cmsgs->authinfo) {
1931 /* Reuse sinfo_tsn to indicate that authinfo was set and
1932 * sinfo_ssn to save the keyid on tx path.
1934 sinfo->sinfo_tsn = 1;
1935 sinfo->sinfo_ssn = cmsgs->authinfo->auth_keynumber;
1939 static int sctp_sendmsg(struct sock *sk, struct msghdr *msg, size_t msg_len)
1941 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
1942 struct sctp_transport *transport = NULL;
1943 struct sctp_sndrcvinfo _sinfo, *sinfo;
1944 struct sctp_association *asoc, *tmp;
1945 struct sctp_cmsgs cmsgs;
1946 union sctp_addr *daddr;
1951 /* Parse and get snd_info */
1952 err = sctp_sendmsg_parse(sk, &cmsgs, &_sinfo, msg, msg_len);
1957 sflags = sinfo->sinfo_flags;
1959 /* Get daddr from msg */
1960 daddr = sctp_sendmsg_get_daddr(sk, msg, &cmsgs);
1961 if (IS_ERR(daddr)) {
1962 err = PTR_ERR(daddr);
1968 /* SCTP_SENDALL process */
1969 if ((sflags & SCTP_SENDALL) && sctp_style(sk, UDP)) {
1970 list_for_each_entry_safe(asoc, tmp, &ep->asocs, asocs) {
1971 err = sctp_sendmsg_check_sflags(asoc, sflags, msg,
1978 sctp_sendmsg_update_sinfo(asoc, sinfo, &cmsgs);
1980 err = sctp_sendmsg_to_asoc(asoc, msg, msg_len,
1985 iov_iter_revert(&msg->msg_iter, err);
1991 /* Get and check or create asoc */
1993 asoc = sctp_endpoint_lookup_assoc(ep, daddr, &transport);
1995 err = sctp_sendmsg_check_sflags(asoc, sflags, msg,
2000 err = sctp_sendmsg_new_asoc(sk, sflags, &cmsgs, daddr,
2005 asoc = transport->asoc;
2009 if (!sctp_style(sk, TCP) && !(sflags & SCTP_ADDR_OVER))
2012 asoc = sctp_id2assoc(sk, sinfo->sinfo_assoc_id);
2018 err = sctp_sendmsg_check_sflags(asoc, sflags, msg, msg_len);
2023 /* Update snd_info with the asoc */
2024 sctp_sendmsg_update_sinfo(asoc, sinfo, &cmsgs);
2026 /* Send msg to the asoc */
2027 err = sctp_sendmsg_to_asoc(asoc, msg, msg_len, transport, sinfo);
2028 if (err < 0 && err != -ESRCH && new)
2029 sctp_association_free(asoc);
2034 return sctp_error(sk, msg->msg_flags, err);
2037 /* This is an extended version of skb_pull() that removes the data from the
2038 * start of a skb even when data is spread across the list of skb's in the
2039 * frag_list. len specifies the total amount of data that needs to be removed.
2040 * when 'len' bytes could be removed from the skb, it returns 0.
2041 * If 'len' exceeds the total skb length, it returns the no. of bytes that
2042 * could not be removed.
2044 static int sctp_skb_pull(struct sk_buff *skb, int len)
2046 struct sk_buff *list;
2047 int skb_len = skb_headlen(skb);
2050 if (len <= skb_len) {
2051 __skb_pull(skb, len);
2055 __skb_pull(skb, skb_len);
2057 skb_walk_frags(skb, list) {
2058 rlen = sctp_skb_pull(list, len);
2059 skb->len -= (len-rlen);
2060 skb->data_len -= (len-rlen);
2071 /* API 3.1.3 recvmsg() - UDP Style Syntax
2073 * ssize_t recvmsg(int socket, struct msghdr *message,
2076 * socket - the socket descriptor of the endpoint.
2077 * message - pointer to the msghdr structure which contains a single
2078 * user message and possibly some ancillary data.
2080 * See Section 5 for complete description of the data
2083 * flags - flags sent or received with the user message, see Section
2084 * 5 for complete description of the flags.
2086 static int sctp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
2087 int noblock, int flags, int *addr_len)
2089 struct sctp_ulpevent *event = NULL;
2090 struct sctp_sock *sp = sctp_sk(sk);
2091 struct sk_buff *skb, *head_skb;
2096 pr_debug("%s: sk:%p, msghdr:%p, len:%zd, noblock:%d, flags:0x%x, "
2097 "addr_len:%p)\n", __func__, sk, msg, len, noblock, flags,
2102 if (sctp_style(sk, TCP) && !sctp_sstate(sk, ESTABLISHED) &&
2103 !sctp_sstate(sk, CLOSING) && !sctp_sstate(sk, CLOSED)) {
2108 skb = sctp_skb_recv_datagram(sk, flags, noblock, &err);
2112 /* Get the total length of the skb including any skb's in the
2121 err = skb_copy_datagram_msg(skb, 0, msg, copied);
2123 event = sctp_skb2event(skb);
2128 if (event->chunk && event->chunk->head_skb)
2129 head_skb = event->chunk->head_skb;
2132 sock_recv_ts_and_drops(msg, sk, head_skb);
2133 if (sctp_ulpevent_is_notification(event)) {
2134 msg->msg_flags |= MSG_NOTIFICATION;
2135 sp->pf->event_msgname(event, msg->msg_name, addr_len);
2137 sp->pf->skb_msgname(head_skb, msg->msg_name, addr_len);
2140 /* Check if we allow SCTP_NXTINFO. */
2141 if (sp->recvnxtinfo)
2142 sctp_ulpevent_read_nxtinfo(event, msg, sk);
2143 /* Check if we allow SCTP_RCVINFO. */
2144 if (sp->recvrcvinfo)
2145 sctp_ulpevent_read_rcvinfo(event, msg);
2146 /* Check if we allow SCTP_SNDRCVINFO. */
2147 if (sctp_ulpevent_type_enabled(sp->subscribe, SCTP_DATA_IO_EVENT))
2148 sctp_ulpevent_read_sndrcvinfo(event, msg);
2152 /* If skb's length exceeds the user's buffer, update the skb and
2153 * push it back to the receive_queue so that the next call to
2154 * recvmsg() will return the remaining data. Don't set MSG_EOR.
2156 if (skb_len > copied) {
2157 msg->msg_flags &= ~MSG_EOR;
2158 if (flags & MSG_PEEK)
2160 sctp_skb_pull(skb, copied);
2161 skb_queue_head(&sk->sk_receive_queue, skb);
2163 /* When only partial message is copied to the user, increase
2164 * rwnd by that amount. If all the data in the skb is read,
2165 * rwnd is updated when the event is freed.
2167 if (!sctp_ulpevent_is_notification(event))
2168 sctp_assoc_rwnd_increase(event->asoc, copied);
2170 } else if ((event->msg_flags & MSG_NOTIFICATION) ||
2171 (event->msg_flags & MSG_EOR))
2172 msg->msg_flags |= MSG_EOR;
2174 msg->msg_flags &= ~MSG_EOR;
2177 if (flags & MSG_PEEK) {
2178 /* Release the skb reference acquired after peeking the skb in
2179 * sctp_skb_recv_datagram().
2183 /* Free the event which includes releasing the reference to
2184 * the owner of the skb, freeing the skb and updating the
2187 sctp_ulpevent_free(event);
2194 /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS)
2196 * This option is a on/off flag. If enabled no SCTP message
2197 * fragmentation will be performed. Instead if a message being sent
2198 * exceeds the current PMTU size, the message will NOT be sent and
2199 * instead a error will be indicated to the user.
2201 static int sctp_setsockopt_disable_fragments(struct sock *sk, int *val,
2202 unsigned int optlen)
2204 if (optlen < sizeof(int))
2206 sctp_sk(sk)->disable_fragments = (*val == 0) ? 0 : 1;
2210 static int sctp_setsockopt_events(struct sock *sk, __u8 *sn_type,
2211 unsigned int optlen)
2213 struct sctp_sock *sp = sctp_sk(sk);
2214 struct sctp_association *asoc;
2217 if (optlen > sizeof(struct sctp_event_subscribe))
2220 for (i = 0; i < optlen; i++)
2221 sctp_ulpevent_type_set(&sp->subscribe, SCTP_SN_TYPE_BASE + i,
2224 list_for_each_entry(asoc, &sp->ep->asocs, asocs)
2225 asoc->subscribe = sctp_sk(sk)->subscribe;
2227 /* At the time when a user app subscribes to SCTP_SENDER_DRY_EVENT,
2228 * if there is no data to be sent or retransmit, the stack will
2229 * immediately send up this notification.
2231 if (sctp_ulpevent_type_enabled(sp->subscribe, SCTP_SENDER_DRY_EVENT)) {
2232 struct sctp_ulpevent *event;
2234 asoc = sctp_id2assoc(sk, 0);
2235 if (asoc && sctp_outq_is_empty(&asoc->outqueue)) {
2236 event = sctp_ulpevent_make_sender_dry_event(asoc,
2237 GFP_USER | __GFP_NOWARN);
2241 asoc->stream.si->enqueue_event(&asoc->ulpq, event);
2248 /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE)
2250 * This socket option is applicable to the UDP-style socket only. When
2251 * set it will cause associations that are idle for more than the
2252 * specified number of seconds to automatically close. An association
2253 * being idle is defined an association that has NOT sent or received
2254 * user data. The special value of '0' indicates that no automatic
2255 * close of any associations should be performed. The option expects an
2256 * integer defining the number of seconds of idle time before an
2257 * association is closed.
2259 static int sctp_setsockopt_autoclose(struct sock *sk, u32 *optval,
2260 unsigned int optlen)
2262 struct sctp_sock *sp = sctp_sk(sk);
2263 struct net *net = sock_net(sk);
2265 /* Applicable to UDP-style socket only */
2266 if (sctp_style(sk, TCP))
2268 if (optlen != sizeof(int))
2271 sp->autoclose = *optval;
2272 if (sp->autoclose > net->sctp.max_autoclose)
2273 sp->autoclose = net->sctp.max_autoclose;
2278 /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS)
2280 * Applications can enable or disable heartbeats for any peer address of
2281 * an association, modify an address's heartbeat interval, force a
2282 * heartbeat to be sent immediately, and adjust the address's maximum
2283 * number of retransmissions sent before an address is considered
2284 * unreachable. The following structure is used to access and modify an
2285 * address's parameters:
2287 * struct sctp_paddrparams {
2288 * sctp_assoc_t spp_assoc_id;
2289 * struct sockaddr_storage spp_address;
2290 * uint32_t spp_hbinterval;
2291 * uint16_t spp_pathmaxrxt;
2292 * uint32_t spp_pathmtu;
2293 * uint32_t spp_sackdelay;
2294 * uint32_t spp_flags;
2295 * uint32_t spp_ipv6_flowlabel;
2299 * spp_assoc_id - (one-to-many style socket) This is filled in the
2300 * application, and identifies the association for
2302 * spp_address - This specifies which address is of interest.
2303 * spp_hbinterval - This contains the value of the heartbeat interval,
2304 * in milliseconds. If a value of zero
2305 * is present in this field then no changes are to
2306 * be made to this parameter.
2307 * spp_pathmaxrxt - This contains the maximum number of
2308 * retransmissions before this address shall be
2309 * considered unreachable. If a value of zero
2310 * is present in this field then no changes are to
2311 * be made to this parameter.
2312 * spp_pathmtu - When Path MTU discovery is disabled the value
2313 * specified here will be the "fixed" path mtu.
2314 * Note that if the spp_address field is empty
2315 * then all associations on this address will
2316 * have this fixed path mtu set upon them.
2318 * spp_sackdelay - When delayed sack is enabled, this value specifies
2319 * the number of milliseconds that sacks will be delayed
2320 * for. This value will apply to all addresses of an
2321 * association if the spp_address field is empty. Note
2322 * also, that if delayed sack is enabled and this
2323 * value is set to 0, no change is made to the last
2324 * recorded delayed sack timer value.
2326 * spp_flags - These flags are used to control various features
2327 * on an association. The flag field may contain
2328 * zero or more of the following options.
2330 * SPP_HB_ENABLE - Enable heartbeats on the
2331 * specified address. Note that if the address
2332 * field is empty all addresses for the association
2333 * have heartbeats enabled upon them.
2335 * SPP_HB_DISABLE - Disable heartbeats on the
2336 * speicifed address. Note that if the address
2337 * field is empty all addresses for the association
2338 * will have their heartbeats disabled. Note also
2339 * that SPP_HB_ENABLE and SPP_HB_DISABLE are
2340 * mutually exclusive, only one of these two should
2341 * be specified. Enabling both fields will have
2342 * undetermined results.
2344 * SPP_HB_DEMAND - Request a user initiated heartbeat
2345 * to be made immediately.
2347 * SPP_HB_TIME_IS_ZERO - Specify's that the time for
2348 * heartbeat delayis to be set to the value of 0
2351 * SPP_PMTUD_ENABLE - This field will enable PMTU
2352 * discovery upon the specified address. Note that
2353 * if the address feild is empty then all addresses
2354 * on the association are effected.
2356 * SPP_PMTUD_DISABLE - This field will disable PMTU
2357 * discovery upon the specified address. Note that
2358 * if the address feild is empty then all addresses
2359 * on the association are effected. Not also that
2360 * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually
2361 * exclusive. Enabling both will have undetermined
2364 * SPP_SACKDELAY_ENABLE - Setting this flag turns
2365 * on delayed sack. The time specified in spp_sackdelay
2366 * is used to specify the sack delay for this address. Note
2367 * that if spp_address is empty then all addresses will
2368 * enable delayed sack and take on the sack delay
2369 * value specified in spp_sackdelay.
2370 * SPP_SACKDELAY_DISABLE - Setting this flag turns
2371 * off delayed sack. If the spp_address field is blank then
2372 * delayed sack is disabled for the entire association. Note
2373 * also that this field is mutually exclusive to
2374 * SPP_SACKDELAY_ENABLE, setting both will have undefined
2377 * SPP_IPV6_FLOWLABEL: Setting this flag enables the
2378 * setting of the IPV6 flow label value. The value is
2379 * contained in the spp_ipv6_flowlabel field.
2380 * Upon retrieval, this flag will be set to indicate that
2381 * the spp_ipv6_flowlabel field has a valid value returned.
2382 * If a specific destination address is set (in the
2383 * spp_address field), then the value returned is that of
2384 * the address. If just an association is specified (and
2385 * no address), then the association's default flow label
2386 * is returned. If neither an association nor a destination
2387 * is specified, then the socket's default flow label is
2388 * returned. For non-IPv6 sockets, this flag will be left
2391 * SPP_DSCP: Setting this flag enables the setting of the
2392 * Differentiated Services Code Point (DSCP) value
2393 * associated with either the association or a specific
2394 * address. The value is obtained in the spp_dscp field.
2395 * Upon retrieval, this flag will be set to indicate that
2396 * the spp_dscp field has a valid value returned. If a
2397 * specific destination address is set when called (in the
2398 * spp_address field), then that specific destination
2399 * address's DSCP value is returned. If just an association
2400 * is specified, then the association's default DSCP is
2401 * returned. If neither an association nor a destination is
2402 * specified, then the socket's default DSCP is returned.
2404 * spp_ipv6_flowlabel
2405 * - This field is used in conjunction with the
2406 * SPP_IPV6_FLOWLABEL flag and contains the IPv6 flow label.
2407 * The 20 least significant bits are used for the flow
2408 * label. This setting has precedence over any IPv6-layer
2411 * spp_dscp - This field is used in conjunction with the SPP_DSCP flag
2412 * and contains the DSCP. The 6 most significant bits are
2413 * used for the DSCP. This setting has precedence over any
2414 * IPv4- or IPv6- layer setting.
2416 static int sctp_apply_peer_addr_params(struct sctp_paddrparams *params,
2417 struct sctp_transport *trans,
2418 struct sctp_association *asoc,
2419 struct sctp_sock *sp,
2422 int sackdelay_change)
2426 if (params->spp_flags & SPP_HB_DEMAND && trans) {
2427 error = sctp_primitive_REQUESTHEARTBEAT(trans->asoc->base.net,
2428 trans->asoc, trans);
2433 /* Note that unless the spp_flag is set to SPP_HB_ENABLE the value of
2434 * this field is ignored. Note also that a value of zero indicates
2435 * the current setting should be left unchanged.
2437 if (params->spp_flags & SPP_HB_ENABLE) {
2439 /* Re-zero the interval if the SPP_HB_TIME_IS_ZERO is
2440 * set. This lets us use 0 value when this flag
2443 if (params->spp_flags & SPP_HB_TIME_IS_ZERO)
2444 params->spp_hbinterval = 0;
2446 if (params->spp_hbinterval ||
2447 (params->spp_flags & SPP_HB_TIME_IS_ZERO)) {
2450 msecs_to_jiffies(params->spp_hbinterval);
2453 msecs_to_jiffies(params->spp_hbinterval);
2455 sp->hbinterval = params->spp_hbinterval;
2462 trans->param_flags =
2463 (trans->param_flags & ~SPP_HB) | hb_change;
2466 (asoc->param_flags & ~SPP_HB) | hb_change;
2469 (sp->param_flags & ~SPP_HB) | hb_change;
2473 /* When Path MTU discovery is disabled the value specified here will
2474 * be the "fixed" path mtu (i.e. the value of the spp_flags field must
2475 * include the flag SPP_PMTUD_DISABLE for this field to have any
2478 if ((params->spp_flags & SPP_PMTUD_DISABLE) && params->spp_pathmtu) {
2480 trans->pathmtu = params->spp_pathmtu;
2481 sctp_assoc_sync_pmtu(asoc);
2483 sctp_assoc_set_pmtu(asoc, params->spp_pathmtu);
2485 sp->pathmtu = params->spp_pathmtu;
2491 int update = (trans->param_flags & SPP_PMTUD_DISABLE) &&
2492 (params->spp_flags & SPP_PMTUD_ENABLE);
2493 trans->param_flags =
2494 (trans->param_flags & ~SPP_PMTUD) | pmtud_change;
2496 sctp_transport_pmtu(trans, sctp_opt2sk(sp));
2497 sctp_assoc_sync_pmtu(asoc);
2499 sctp_transport_pl_reset(trans);
2502 (asoc->param_flags & ~SPP_PMTUD) | pmtud_change;
2505 (sp->param_flags & ~SPP_PMTUD) | pmtud_change;
2509 /* Note that unless the spp_flag is set to SPP_SACKDELAY_ENABLE the
2510 * value of this field is ignored. Note also that a value of zero
2511 * indicates the current setting should be left unchanged.
2513 if ((params->spp_flags & SPP_SACKDELAY_ENABLE) && params->spp_sackdelay) {
2516 msecs_to_jiffies(params->spp_sackdelay);
2519 msecs_to_jiffies(params->spp_sackdelay);
2521 sp->sackdelay = params->spp_sackdelay;
2525 if (sackdelay_change) {
2527 trans->param_flags =
2528 (trans->param_flags & ~SPP_SACKDELAY) |
2532 (asoc->param_flags & ~SPP_SACKDELAY) |
2536 (sp->param_flags & ~SPP_SACKDELAY) |
2541 /* Note that a value of zero indicates the current setting should be
2544 if (params->spp_pathmaxrxt) {
2546 trans->pathmaxrxt = params->spp_pathmaxrxt;
2548 asoc->pathmaxrxt = params->spp_pathmaxrxt;
2550 sp->pathmaxrxt = params->spp_pathmaxrxt;
2554 if (params->spp_flags & SPP_IPV6_FLOWLABEL) {
2556 if (trans->ipaddr.sa.sa_family == AF_INET6) {
2557 trans->flowlabel = params->spp_ipv6_flowlabel &
2558 SCTP_FLOWLABEL_VAL_MASK;
2559 trans->flowlabel |= SCTP_FLOWLABEL_SET_MASK;
2562 struct sctp_transport *t;
2564 list_for_each_entry(t, &asoc->peer.transport_addr_list,
2566 if (t->ipaddr.sa.sa_family != AF_INET6)
2568 t->flowlabel = params->spp_ipv6_flowlabel &
2569 SCTP_FLOWLABEL_VAL_MASK;
2570 t->flowlabel |= SCTP_FLOWLABEL_SET_MASK;
2572 asoc->flowlabel = params->spp_ipv6_flowlabel &
2573 SCTP_FLOWLABEL_VAL_MASK;
2574 asoc->flowlabel |= SCTP_FLOWLABEL_SET_MASK;
2575 } else if (sctp_opt2sk(sp)->sk_family == AF_INET6) {
2576 sp->flowlabel = params->spp_ipv6_flowlabel &
2577 SCTP_FLOWLABEL_VAL_MASK;
2578 sp->flowlabel |= SCTP_FLOWLABEL_SET_MASK;
2582 if (params->spp_flags & SPP_DSCP) {
2584 trans->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK;
2585 trans->dscp |= SCTP_DSCP_SET_MASK;
2587 struct sctp_transport *t;
2589 list_for_each_entry(t, &asoc->peer.transport_addr_list,
2591 t->dscp = params->spp_dscp &
2593 t->dscp |= SCTP_DSCP_SET_MASK;
2595 asoc->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK;
2596 asoc->dscp |= SCTP_DSCP_SET_MASK;
2598 sp->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK;
2599 sp->dscp |= SCTP_DSCP_SET_MASK;
2606 static int sctp_setsockopt_peer_addr_params(struct sock *sk,
2607 struct sctp_paddrparams *params,
2608 unsigned int optlen)
2610 struct sctp_transport *trans = NULL;
2611 struct sctp_association *asoc = NULL;
2612 struct sctp_sock *sp = sctp_sk(sk);
2614 int hb_change, pmtud_change, sackdelay_change;
2616 if (optlen == ALIGN(offsetof(struct sctp_paddrparams,
2617 spp_ipv6_flowlabel), 4)) {
2618 if (params->spp_flags & (SPP_DSCP | SPP_IPV6_FLOWLABEL))
2620 } else if (optlen != sizeof(*params)) {
2624 /* Validate flags and value parameters. */
2625 hb_change = params->spp_flags & SPP_HB;
2626 pmtud_change = params->spp_flags & SPP_PMTUD;
2627 sackdelay_change = params->spp_flags & SPP_SACKDELAY;
2629 if (hb_change == SPP_HB ||
2630 pmtud_change == SPP_PMTUD ||
2631 sackdelay_change == SPP_SACKDELAY ||
2632 params->spp_sackdelay > 500 ||
2633 (params->spp_pathmtu &&
2634 params->spp_pathmtu < SCTP_DEFAULT_MINSEGMENT))
2637 /* If an address other than INADDR_ANY is specified, and
2638 * no transport is found, then the request is invalid.
2640 if (!sctp_is_any(sk, (union sctp_addr *)¶ms->spp_address)) {
2641 trans = sctp_addr_id2transport(sk, ¶ms->spp_address,
2642 params->spp_assoc_id);
2647 /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
2648 * socket is a one to many style socket, and an association
2649 * was not found, then the id was invalid.
2651 asoc = sctp_id2assoc(sk, params->spp_assoc_id);
2652 if (!asoc && params->spp_assoc_id != SCTP_FUTURE_ASSOC &&
2653 sctp_style(sk, UDP))
2656 /* Heartbeat demand can only be sent on a transport or
2657 * association, but not a socket.
2659 if (params->spp_flags & SPP_HB_DEMAND && !trans && !asoc)
2662 /* Process parameters. */
2663 error = sctp_apply_peer_addr_params(params, trans, asoc, sp,
2664 hb_change, pmtud_change,
2670 /* If changes are for association, also apply parameters to each
2673 if (!trans && asoc) {
2674 list_for_each_entry(trans, &asoc->peer.transport_addr_list,
2676 sctp_apply_peer_addr_params(params, trans, asoc, sp,
2677 hb_change, pmtud_change,
2685 static inline __u32 sctp_spp_sackdelay_enable(__u32 param_flags)
2687 return (param_flags & ~SPP_SACKDELAY) | SPP_SACKDELAY_ENABLE;
2690 static inline __u32 sctp_spp_sackdelay_disable(__u32 param_flags)
2692 return (param_flags & ~SPP_SACKDELAY) | SPP_SACKDELAY_DISABLE;
2695 static void sctp_apply_asoc_delayed_ack(struct sctp_sack_info *params,
2696 struct sctp_association *asoc)
2698 struct sctp_transport *trans;
2700 if (params->sack_delay) {
2701 asoc->sackdelay = msecs_to_jiffies(params->sack_delay);
2703 sctp_spp_sackdelay_enable(asoc->param_flags);
2705 if (params->sack_freq == 1) {
2707 sctp_spp_sackdelay_disable(asoc->param_flags);
2708 } else if (params->sack_freq > 1) {
2709 asoc->sackfreq = params->sack_freq;
2711 sctp_spp_sackdelay_enable(asoc->param_flags);
2714 list_for_each_entry(trans, &asoc->peer.transport_addr_list,
2716 if (params->sack_delay) {
2717 trans->sackdelay = msecs_to_jiffies(params->sack_delay);
2718 trans->param_flags =
2719 sctp_spp_sackdelay_enable(trans->param_flags);
2721 if (params->sack_freq == 1) {
2722 trans->param_flags =
2723 sctp_spp_sackdelay_disable(trans->param_flags);
2724 } else if (params->sack_freq > 1) {
2725 trans->sackfreq = params->sack_freq;
2726 trans->param_flags =
2727 sctp_spp_sackdelay_enable(trans->param_flags);
2733 * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK)
2735 * This option will effect the way delayed acks are performed. This
2736 * option allows you to get or set the delayed ack time, in
2737 * milliseconds. It also allows changing the delayed ack frequency.
2738 * Changing the frequency to 1 disables the delayed sack algorithm. If
2739 * the assoc_id is 0, then this sets or gets the endpoints default
2740 * values. If the assoc_id field is non-zero, then the set or get
2741 * effects the specified association for the one to many model (the
2742 * assoc_id field is ignored by the one to one model). Note that if
2743 * sack_delay or sack_freq are 0 when setting this option, then the
2744 * current values will remain unchanged.
2746 * struct sctp_sack_info {
2747 * sctp_assoc_t sack_assoc_id;
2748 * uint32_t sack_delay;
2749 * uint32_t sack_freq;
2752 * sack_assoc_id - This parameter, indicates which association the user
2753 * is performing an action upon. Note that if this field's value is
2754 * zero then the endpoints default value is changed (effecting future
2755 * associations only).
2757 * sack_delay - This parameter contains the number of milliseconds that
2758 * the user is requesting the delayed ACK timer be set to. Note that
2759 * this value is defined in the standard to be between 200 and 500
2762 * sack_freq - This parameter contains the number of packets that must
2763 * be received before a sack is sent without waiting for the delay
2764 * timer to expire. The default value for this is 2, setting this
2765 * value to 1 will disable the delayed sack algorithm.
2767 static int __sctp_setsockopt_delayed_ack(struct sock *sk,
2768 struct sctp_sack_info *params)
2770 struct sctp_sock *sp = sctp_sk(sk);
2771 struct sctp_association *asoc;
2773 /* Validate value parameter. */
2774 if (params->sack_delay > 500)
2777 /* Get association, if sack_assoc_id != SCTP_FUTURE_ASSOC and the
2778 * socket is a one to many style socket, and an association
2779 * was not found, then the id was invalid.
2781 asoc = sctp_id2assoc(sk, params->sack_assoc_id);
2782 if (!asoc && params->sack_assoc_id > SCTP_ALL_ASSOC &&
2783 sctp_style(sk, UDP))
2787 sctp_apply_asoc_delayed_ack(params, asoc);
2792 if (sctp_style(sk, TCP))
2793 params->sack_assoc_id = SCTP_FUTURE_ASSOC;
2795 if (params->sack_assoc_id == SCTP_FUTURE_ASSOC ||
2796 params->sack_assoc_id == SCTP_ALL_ASSOC) {
2797 if (params->sack_delay) {
2798 sp->sackdelay = params->sack_delay;
2800 sctp_spp_sackdelay_enable(sp->param_flags);
2802 if (params->sack_freq == 1) {
2804 sctp_spp_sackdelay_disable(sp->param_flags);
2805 } else if (params->sack_freq > 1) {
2806 sp->sackfreq = params->sack_freq;
2808 sctp_spp_sackdelay_enable(sp->param_flags);
2812 if (params->sack_assoc_id == SCTP_CURRENT_ASSOC ||
2813 params->sack_assoc_id == SCTP_ALL_ASSOC)
2814 list_for_each_entry(asoc, &sp->ep->asocs, asocs)
2815 sctp_apply_asoc_delayed_ack(params, asoc);
2820 static int sctp_setsockopt_delayed_ack(struct sock *sk,
2821 struct sctp_sack_info *params,
2822 unsigned int optlen)
2824 if (optlen == sizeof(struct sctp_assoc_value)) {
2825 struct sctp_assoc_value *v = (struct sctp_assoc_value *)params;
2826 struct sctp_sack_info p;
2828 pr_warn_ratelimited(DEPRECATED
2830 "Use of struct sctp_assoc_value in delayed_ack socket option.\n"
2831 "Use struct sctp_sack_info instead\n",
2832 current->comm, task_pid_nr(current));
2834 p.sack_assoc_id = v->assoc_id;
2835 p.sack_delay = v->assoc_value;
2836 p.sack_freq = v->assoc_value ? 0 : 1;
2837 return __sctp_setsockopt_delayed_ack(sk, &p);
2840 if (optlen != sizeof(struct sctp_sack_info))
2842 if (params->sack_delay == 0 && params->sack_freq == 0)
2844 return __sctp_setsockopt_delayed_ack(sk, params);
2847 /* 7.1.3 Initialization Parameters (SCTP_INITMSG)
2849 * Applications can specify protocol parameters for the default association
2850 * initialization. The option name argument to setsockopt() and getsockopt()
2853 * Setting initialization parameters is effective only on an unconnected
2854 * socket (for UDP-style sockets only future associations are effected
2855 * by the change). With TCP-style sockets, this option is inherited by
2856 * sockets derived from a listener socket.
2858 static int sctp_setsockopt_initmsg(struct sock *sk, struct sctp_initmsg *sinit,
2859 unsigned int optlen)
2861 struct sctp_sock *sp = sctp_sk(sk);
2863 if (optlen != sizeof(struct sctp_initmsg))
2866 if (sinit->sinit_num_ostreams)
2867 sp->initmsg.sinit_num_ostreams = sinit->sinit_num_ostreams;
2868 if (sinit->sinit_max_instreams)
2869 sp->initmsg.sinit_max_instreams = sinit->sinit_max_instreams;
2870 if (sinit->sinit_max_attempts)
2871 sp->initmsg.sinit_max_attempts = sinit->sinit_max_attempts;
2872 if (sinit->sinit_max_init_timeo)
2873 sp->initmsg.sinit_max_init_timeo = sinit->sinit_max_init_timeo;
2879 * 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM)
2881 * Applications that wish to use the sendto() system call may wish to
2882 * specify a default set of parameters that would normally be supplied
2883 * through the inclusion of ancillary data. This socket option allows
2884 * such an application to set the default sctp_sndrcvinfo structure.
2885 * The application that wishes to use this socket option simply passes
2886 * in to this call the sctp_sndrcvinfo structure defined in Section
2887 * 5.2.2) The input parameters accepted by this call include
2888 * sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context,
2889 * sinfo_timetolive. The user must provide the sinfo_assoc_id field in
2890 * to this call if the caller is using the UDP model.
2892 static int sctp_setsockopt_default_send_param(struct sock *sk,
2893 struct sctp_sndrcvinfo *info,
2894 unsigned int optlen)
2896 struct sctp_sock *sp = sctp_sk(sk);
2897 struct sctp_association *asoc;
2899 if (optlen != sizeof(*info))
2901 if (info->sinfo_flags &
2902 ~(SCTP_UNORDERED | SCTP_ADDR_OVER |
2903 SCTP_ABORT | SCTP_EOF))
2906 asoc = sctp_id2assoc(sk, info->sinfo_assoc_id);
2907 if (!asoc && info->sinfo_assoc_id > SCTP_ALL_ASSOC &&
2908 sctp_style(sk, UDP))
2912 asoc->default_stream = info->sinfo_stream;
2913 asoc->default_flags = info->sinfo_flags;
2914 asoc->default_ppid = info->sinfo_ppid;
2915 asoc->default_context = info->sinfo_context;
2916 asoc->default_timetolive = info->sinfo_timetolive;
2921 if (sctp_style(sk, TCP))
2922 info->sinfo_assoc_id = SCTP_FUTURE_ASSOC;
2924 if (info->sinfo_assoc_id == SCTP_FUTURE_ASSOC ||
2925 info->sinfo_assoc_id == SCTP_ALL_ASSOC) {
2926 sp->default_stream = info->sinfo_stream;
2927 sp->default_flags = info->sinfo_flags;
2928 sp->default_ppid = info->sinfo_ppid;
2929 sp->default_context = info->sinfo_context;
2930 sp->default_timetolive = info->sinfo_timetolive;
2933 if (info->sinfo_assoc_id == SCTP_CURRENT_ASSOC ||
2934 info->sinfo_assoc_id == SCTP_ALL_ASSOC) {
2935 list_for_each_entry(asoc, &sp->ep->asocs, asocs) {
2936 asoc->default_stream = info->sinfo_stream;
2937 asoc->default_flags = info->sinfo_flags;
2938 asoc->default_ppid = info->sinfo_ppid;
2939 asoc->default_context = info->sinfo_context;
2940 asoc->default_timetolive = info->sinfo_timetolive;
2947 /* RFC6458, Section 8.1.31. Set/get Default Send Parameters
2948 * (SCTP_DEFAULT_SNDINFO)
2950 static int sctp_setsockopt_default_sndinfo(struct sock *sk,
2951 struct sctp_sndinfo *info,
2952 unsigned int optlen)
2954 struct sctp_sock *sp = sctp_sk(sk);
2955 struct sctp_association *asoc;
2957 if (optlen != sizeof(*info))
2959 if (info->snd_flags &
2960 ~(SCTP_UNORDERED | SCTP_ADDR_OVER |
2961 SCTP_ABORT | SCTP_EOF))
2964 asoc = sctp_id2assoc(sk, info->snd_assoc_id);
2965 if (!asoc && info->snd_assoc_id > SCTP_ALL_ASSOC &&
2966 sctp_style(sk, UDP))
2970 asoc->default_stream = info->snd_sid;
2971 asoc->default_flags = info->snd_flags;
2972 asoc->default_ppid = info->snd_ppid;
2973 asoc->default_context = info->snd_context;
2978 if (sctp_style(sk, TCP))
2979 info->snd_assoc_id = SCTP_FUTURE_ASSOC;
2981 if (info->snd_assoc_id == SCTP_FUTURE_ASSOC ||
2982 info->snd_assoc_id == SCTP_ALL_ASSOC) {
2983 sp->default_stream = info->snd_sid;
2984 sp->default_flags = info->snd_flags;
2985 sp->default_ppid = info->snd_ppid;
2986 sp->default_context = info->snd_context;
2989 if (info->snd_assoc_id == SCTP_CURRENT_ASSOC ||
2990 info->snd_assoc_id == SCTP_ALL_ASSOC) {
2991 list_for_each_entry(asoc, &sp->ep->asocs, asocs) {
2992 asoc->default_stream = info->snd_sid;
2993 asoc->default_flags = info->snd_flags;
2994 asoc->default_ppid = info->snd_ppid;
2995 asoc->default_context = info->snd_context;
3002 /* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
3004 * Requests that the local SCTP stack use the enclosed peer address as
3005 * the association primary. The enclosed address must be one of the
3006 * association peer's addresses.
3008 static int sctp_setsockopt_primary_addr(struct sock *sk, struct sctp_prim *prim,
3009 unsigned int optlen)
3011 struct sctp_transport *trans;
3015 if (optlen != sizeof(struct sctp_prim))
3018 /* Allow security module to validate address but need address len. */
3019 af = sctp_get_af_specific(prim->ssp_addr.ss_family);
3023 err = security_sctp_bind_connect(sk, SCTP_PRIMARY_ADDR,
3024 (struct sockaddr *)&prim->ssp_addr,
3029 trans = sctp_addr_id2transport(sk, &prim->ssp_addr, prim->ssp_assoc_id);
3033 sctp_assoc_set_primary(trans->asoc, trans);
3039 * 7.1.5 SCTP_NODELAY
3041 * Turn on/off any Nagle-like algorithm. This means that packets are
3042 * generally sent as soon as possible and no unnecessary delays are
3043 * introduced, at the cost of more packets in the network. Expects an
3044 * integer boolean flag.
3046 static int sctp_setsockopt_nodelay(struct sock *sk, int *val,
3047 unsigned int optlen)
3049 if (optlen < sizeof(int))
3051 sctp_sk(sk)->nodelay = (*val == 0) ? 0 : 1;
3057 * 7.1.1 SCTP_RTOINFO
3059 * The protocol parameters used to initialize and bound retransmission
3060 * timeout (RTO) are tunable. sctp_rtoinfo structure is used to access
3061 * and modify these parameters.
3062 * All parameters are time values, in milliseconds. A value of 0, when
3063 * modifying the parameters, indicates that the current value should not
3067 static int sctp_setsockopt_rtoinfo(struct sock *sk,
3068 struct sctp_rtoinfo *rtoinfo,
3069 unsigned int optlen)
3071 struct sctp_association *asoc;
3072 unsigned long rto_min, rto_max;
3073 struct sctp_sock *sp = sctp_sk(sk);
3075 if (optlen != sizeof (struct sctp_rtoinfo))
3078 asoc = sctp_id2assoc(sk, rtoinfo->srto_assoc_id);
3080 /* Set the values to the specific association */
3081 if (!asoc && rtoinfo->srto_assoc_id != SCTP_FUTURE_ASSOC &&
3082 sctp_style(sk, UDP))
3085 rto_max = rtoinfo->srto_max;
3086 rto_min = rtoinfo->srto_min;
3089 rto_max = asoc ? msecs_to_jiffies(rto_max) : rto_max;
3091 rto_max = asoc ? asoc->rto_max : sp->rtoinfo.srto_max;
3094 rto_min = asoc ? msecs_to_jiffies(rto_min) : rto_min;
3096 rto_min = asoc ? asoc->rto_min : sp->rtoinfo.srto_min;
3098 if (rto_min > rto_max)
3102 if (rtoinfo->srto_initial != 0)
3104 msecs_to_jiffies(rtoinfo->srto_initial);
3105 asoc->rto_max = rto_max;
3106 asoc->rto_min = rto_min;
3108 /* If there is no association or the association-id = 0
3109 * set the values to the endpoint.
3111 if (rtoinfo->srto_initial != 0)
3112 sp->rtoinfo.srto_initial = rtoinfo->srto_initial;
3113 sp->rtoinfo.srto_max = rto_max;
3114 sp->rtoinfo.srto_min = rto_min;
3122 * 7.1.2 SCTP_ASSOCINFO
3124 * This option is used to tune the maximum retransmission attempts
3125 * of the association.
3126 * Returns an error if the new association retransmission value is
3127 * greater than the sum of the retransmission value of the peer.
3128 * See [SCTP] for more information.
3131 static int sctp_setsockopt_associnfo(struct sock *sk,
3132 struct sctp_assocparams *assocparams,
3133 unsigned int optlen)
3136 struct sctp_association *asoc;
3138 if (optlen != sizeof(struct sctp_assocparams))
3141 asoc = sctp_id2assoc(sk, assocparams->sasoc_assoc_id);
3143 if (!asoc && assocparams->sasoc_assoc_id != SCTP_FUTURE_ASSOC &&
3144 sctp_style(sk, UDP))
3147 /* Set the values to the specific association */
3149 if (assocparams->sasoc_asocmaxrxt != 0) {
3152 struct sctp_transport *peer_addr;
3154 list_for_each_entry(peer_addr, &asoc->peer.transport_addr_list,
3156 path_sum += peer_addr->pathmaxrxt;
3160 /* Only validate asocmaxrxt if we have more than
3161 * one path/transport. We do this because path
3162 * retransmissions are only counted when we have more
3166 assocparams->sasoc_asocmaxrxt > path_sum)
3169 asoc->max_retrans = assocparams->sasoc_asocmaxrxt;
3172 if (assocparams->sasoc_cookie_life != 0)
3174 ms_to_ktime(assocparams->sasoc_cookie_life);
3176 /* Set the values to the endpoint */
3177 struct sctp_sock *sp = sctp_sk(sk);
3179 if (assocparams->sasoc_asocmaxrxt != 0)
3180 sp->assocparams.sasoc_asocmaxrxt =
3181 assocparams->sasoc_asocmaxrxt;
3182 if (assocparams->sasoc_cookie_life != 0)
3183 sp->assocparams.sasoc_cookie_life =
3184 assocparams->sasoc_cookie_life;
3190 * 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR)
3192 * This socket option is a boolean flag which turns on or off mapped V4
3193 * addresses. If this option is turned on and the socket is type
3194 * PF_INET6, then IPv4 addresses will be mapped to V6 representation.
3195 * If this option is turned off, then no mapping will be done of V4
3196 * addresses and a user will receive both PF_INET6 and PF_INET type
3197 * addresses on the socket.
3199 static int sctp_setsockopt_mappedv4(struct sock *sk, int *val,
3200 unsigned int optlen)
3202 struct sctp_sock *sp = sctp_sk(sk);
3204 if (optlen < sizeof(int))
3215 * 8.1.16. Get or Set the Maximum Fragmentation Size (SCTP_MAXSEG)
3216 * This option will get or set the maximum size to put in any outgoing
3217 * SCTP DATA chunk. If a message is larger than this size it will be
3218 * fragmented by SCTP into the specified size. Note that the underlying
3219 * SCTP implementation may fragment into smaller sized chunks when the
3220 * PMTU of the underlying association is smaller than the value set by
3221 * the user. The default value for this option is '0' which indicates
3222 * the user is NOT limiting fragmentation and only the PMTU will effect
3223 * SCTP's choice of DATA chunk size. Note also that values set larger
3224 * than the maximum size of an IP datagram will effectively let SCTP
3225 * control fragmentation (i.e. the same as setting this option to 0).
3227 * The following structure is used to access and modify this parameter:
3229 * struct sctp_assoc_value {
3230 * sctp_assoc_t assoc_id;
3231 * uint32_t assoc_value;
3234 * assoc_id: This parameter is ignored for one-to-one style sockets.
3235 * For one-to-many style sockets this parameter indicates which
3236 * association the user is performing an action upon. Note that if
3237 * this field's value is zero then the endpoints default value is
3238 * changed (effecting future associations only).
3239 * assoc_value: This parameter specifies the maximum size in bytes.
3241 static int sctp_setsockopt_maxseg(struct sock *sk,
3242 struct sctp_assoc_value *params,
3243 unsigned int optlen)
3245 struct sctp_sock *sp = sctp_sk(sk);
3246 struct sctp_association *asoc;
3247 sctp_assoc_t assoc_id;
3250 if (optlen == sizeof(int)) {
3251 pr_warn_ratelimited(DEPRECATED
3253 "Use of int in maxseg socket option.\n"
3254 "Use struct sctp_assoc_value instead\n",
3255 current->comm, task_pid_nr(current));
3256 assoc_id = SCTP_FUTURE_ASSOC;
3257 val = *(int *)params;
3258 } else if (optlen == sizeof(struct sctp_assoc_value)) {
3259 assoc_id = params->assoc_id;
3260 val = params->assoc_value;
3265 asoc = sctp_id2assoc(sk, assoc_id);
3266 if (!asoc && assoc_id != SCTP_FUTURE_ASSOC &&
3267 sctp_style(sk, UDP))
3271 int min_len, max_len;
3272 __u16 datasize = asoc ? sctp_datachk_len(&asoc->stream) :
3273 sizeof(struct sctp_data_chunk);
3275 min_len = sctp_min_frag_point(sp, datasize);
3276 max_len = SCTP_MAX_CHUNK_LEN - datasize;
3278 if (val < min_len || val > max_len)
3283 asoc->user_frag = val;
3284 sctp_assoc_update_frag_point(asoc);
3286 sp->user_frag = val;
3294 * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR)
3296 * Requests that the peer mark the enclosed address as the association
3297 * primary. The enclosed address must be one of the association's
3298 * locally bound addresses. The following structure is used to make a
3299 * set primary request:
3301 static int sctp_setsockopt_peer_primary_addr(struct sock *sk,
3302 struct sctp_setpeerprim *prim,
3303 unsigned int optlen)
3305 struct sctp_sock *sp;
3306 struct sctp_association *asoc = NULL;
3307 struct sctp_chunk *chunk;
3313 if (!sp->ep->asconf_enable)
3316 if (optlen != sizeof(struct sctp_setpeerprim))
3319 asoc = sctp_id2assoc(sk, prim->sspp_assoc_id);
3323 if (!asoc->peer.asconf_capable)
3326 if (asoc->peer.addip_disabled_mask & SCTP_PARAM_SET_PRIMARY)
3329 if (!sctp_state(asoc, ESTABLISHED))
3332 af = sctp_get_af_specific(prim->sspp_addr.ss_family);
3336 if (!af->addr_valid((union sctp_addr *)&prim->sspp_addr, sp, NULL))
3337 return -EADDRNOTAVAIL;
3339 if (!sctp_assoc_lookup_laddr(asoc, (union sctp_addr *)&prim->sspp_addr))
3340 return -EADDRNOTAVAIL;
3342 /* Allow security module to validate address. */
3343 err = security_sctp_bind_connect(sk, SCTP_SET_PEER_PRIMARY_ADDR,
3344 (struct sockaddr *)&prim->sspp_addr,
3349 /* Create an ASCONF chunk with SET_PRIMARY parameter */
3350 chunk = sctp_make_asconf_set_prim(asoc,
3351 (union sctp_addr *)&prim->sspp_addr);
3355 err = sctp_send_asconf(asoc, chunk);
3357 pr_debug("%s: we set peer primary addr primitively\n", __func__);
3362 static int sctp_setsockopt_adaptation_layer(struct sock *sk,
3363 struct sctp_setadaptation *adapt,
3364 unsigned int optlen)
3366 if (optlen != sizeof(struct sctp_setadaptation))
3369 sctp_sk(sk)->adaptation_ind = adapt->ssb_adaptation_ind;
3375 * 7.1.29. Set or Get the default context (SCTP_CONTEXT)
3377 * The context field in the sctp_sndrcvinfo structure is normally only
3378 * used when a failed message is retrieved holding the value that was
3379 * sent down on the actual send call. This option allows the setting of
3380 * a default context on an association basis that will be received on
3381 * reading messages from the peer. This is especially helpful in the
3382 * one-2-many model for an application to keep some reference to an
3383 * internal state machine that is processing messages on the
3384 * association. Note that the setting of this value only effects
3385 * received messages from the peer and does not effect the value that is
3386 * saved with outbound messages.
3388 static int sctp_setsockopt_context(struct sock *sk,
3389 struct sctp_assoc_value *params,
3390 unsigned int optlen)
3392 struct sctp_sock *sp = sctp_sk(sk);
3393 struct sctp_association *asoc;
3395 if (optlen != sizeof(struct sctp_assoc_value))
3398 asoc = sctp_id2assoc(sk, params->assoc_id);
3399 if (!asoc && params->assoc_id > SCTP_ALL_ASSOC &&
3400 sctp_style(sk, UDP))
3404 asoc->default_rcv_context = params->assoc_value;
3409 if (sctp_style(sk, TCP))
3410 params->assoc_id = SCTP_FUTURE_ASSOC;
3412 if (params->assoc_id == SCTP_FUTURE_ASSOC ||
3413 params->assoc_id == SCTP_ALL_ASSOC)
3414 sp->default_rcv_context = params->assoc_value;
3416 if (params->assoc_id == SCTP_CURRENT_ASSOC ||
3417 params->assoc_id == SCTP_ALL_ASSOC)
3418 list_for_each_entry(asoc, &sp->ep->asocs, asocs)
3419 asoc->default_rcv_context = params->assoc_value;
3425 * 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE)
3427 * This options will at a minimum specify if the implementation is doing
3428 * fragmented interleave. Fragmented interleave, for a one to many
3429 * socket, is when subsequent calls to receive a message may return
3430 * parts of messages from different associations. Some implementations
3431 * may allow you to turn this value on or off. If so, when turned off,
3432 * no fragment interleave will occur (which will cause a head of line
3433 * blocking amongst multiple associations sharing the same one to many
3434 * socket). When this option is turned on, then each receive call may
3435 * come from a different association (thus the user must receive data
3436 * with the extended calls (e.g. sctp_recvmsg) to keep track of which
3437 * association each receive belongs to.
3439 * This option takes a boolean value. A non-zero value indicates that
3440 * fragmented interleave is on. A value of zero indicates that
3441 * fragmented interleave is off.
3443 * Note that it is important that an implementation that allows this
3444 * option to be turned on, have it off by default. Otherwise an unaware
3445 * application using the one to many model may become confused and act
3448 static int sctp_setsockopt_fragment_interleave(struct sock *sk, int *val,
3449 unsigned int optlen)
3451 if (optlen != sizeof(int))
3454 sctp_sk(sk)->frag_interleave = !!*val;
3456 if (!sctp_sk(sk)->frag_interleave)
3457 sctp_sk(sk)->ep->intl_enable = 0;
3463 * 8.1.21. Set or Get the SCTP Partial Delivery Point
3464 * (SCTP_PARTIAL_DELIVERY_POINT)
3466 * This option will set or get the SCTP partial delivery point. This
3467 * point is the size of a message where the partial delivery API will be
3468 * invoked to help free up rwnd space for the peer. Setting this to a
3469 * lower value will cause partial deliveries to happen more often. The
3470 * calls argument is an integer that sets or gets the partial delivery
3471 * point. Note also that the call will fail if the user attempts to set
3472 * this value larger than the socket receive buffer size.
3474 * Note that any single message having a length smaller than or equal to
3475 * the SCTP partial delivery point will be delivered in one single read
3476 * call as long as the user provided buffer is large enough to hold the
3479 static int sctp_setsockopt_partial_delivery_point(struct sock *sk, u32 *val,
3480 unsigned int optlen)
3482 if (optlen != sizeof(u32))
3485 /* Note: We double the receive buffer from what the user sets
3486 * it to be, also initial rwnd is based on rcvbuf/2.
3488 if (*val > (sk->sk_rcvbuf >> 1))
3491 sctp_sk(sk)->pd_point = *val;
3493 return 0; /* is this the right error code? */
3497 * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST)
3499 * This option will allow a user to change the maximum burst of packets
3500 * that can be emitted by this association. Note that the default value
3501 * is 4, and some implementations may restrict this setting so that it
3502 * can only be lowered.
3504 * NOTE: This text doesn't seem right. Do this on a socket basis with
3505 * future associations inheriting the socket value.
3507 static int sctp_setsockopt_maxburst(struct sock *sk,
3508 struct sctp_assoc_value *params,
3509 unsigned int optlen)
3511 struct sctp_sock *sp = sctp_sk(sk);
3512 struct sctp_association *asoc;
3513 sctp_assoc_t assoc_id;
3516 if (optlen == sizeof(int)) {
3517 pr_warn_ratelimited(DEPRECATED
3519 "Use of int in max_burst socket option deprecated.\n"
3520 "Use struct sctp_assoc_value instead\n",
3521 current->comm, task_pid_nr(current));
3522 assoc_id = SCTP_FUTURE_ASSOC;
3523 assoc_value = *((int *)params);
3524 } else if (optlen == sizeof(struct sctp_assoc_value)) {
3525 assoc_id = params->assoc_id;
3526 assoc_value = params->assoc_value;
3530 asoc = sctp_id2assoc(sk, assoc_id);
3531 if (!asoc && assoc_id > SCTP_ALL_ASSOC && sctp_style(sk, UDP))
3535 asoc->max_burst = assoc_value;
3540 if (sctp_style(sk, TCP))
3541 assoc_id = SCTP_FUTURE_ASSOC;
3543 if (assoc_id == SCTP_FUTURE_ASSOC || assoc_id == SCTP_ALL_ASSOC)
3544 sp->max_burst = assoc_value;
3546 if (assoc_id == SCTP_CURRENT_ASSOC || assoc_id == SCTP_ALL_ASSOC)
3547 list_for_each_entry(asoc, &sp->ep->asocs, asocs)
3548 asoc->max_burst = assoc_value;
3554 * 7.1.18. Add a chunk that must be authenticated (SCTP_AUTH_CHUNK)
3556 * This set option adds a chunk type that the user is requesting to be
3557 * received only in an authenticated way. Changes to the list of chunks
3558 * will only effect future associations on the socket.
3560 static int sctp_setsockopt_auth_chunk(struct sock *sk,
3561 struct sctp_authchunk *val,
3562 unsigned int optlen)
3564 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
3566 if (!ep->auth_enable)
3569 if (optlen != sizeof(struct sctp_authchunk))
3572 switch (val->sauth_chunk) {
3574 case SCTP_CID_INIT_ACK:
3575 case SCTP_CID_SHUTDOWN_COMPLETE:
3580 /* add this chunk id to the endpoint */
3581 return sctp_auth_ep_add_chunkid(ep, val->sauth_chunk);
3585 * 7.1.19. Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT)
3587 * This option gets or sets the list of HMAC algorithms that the local
3588 * endpoint requires the peer to use.
3590 static int sctp_setsockopt_hmac_ident(struct sock *sk,
3591 struct sctp_hmacalgo *hmacs,
3592 unsigned int optlen)
3594 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
3597 if (!ep->auth_enable)
3600 if (optlen < sizeof(struct sctp_hmacalgo))
3602 optlen = min_t(unsigned int, optlen, sizeof(struct sctp_hmacalgo) +
3603 SCTP_AUTH_NUM_HMACS * sizeof(u16));
3605 idents = hmacs->shmac_num_idents;
3606 if (idents == 0 || idents > SCTP_AUTH_NUM_HMACS ||
3607 (idents * sizeof(u16)) > (optlen - sizeof(struct sctp_hmacalgo)))
3610 return sctp_auth_ep_set_hmacs(ep, hmacs);
3614 * 7.1.20. Set a shared key (SCTP_AUTH_KEY)
3616 * This option will set a shared secret key which is used to build an
3617 * association shared key.
3619 static int sctp_setsockopt_auth_key(struct sock *sk,
3620 struct sctp_authkey *authkey,
3621 unsigned int optlen)
3623 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
3624 struct sctp_association *asoc;
3627 if (optlen <= sizeof(struct sctp_authkey))
3629 /* authkey->sca_keylength is u16, so optlen can't be bigger than
3632 optlen = min_t(unsigned int, optlen, USHRT_MAX + sizeof(*authkey));
3634 if (authkey->sca_keylength > optlen - sizeof(*authkey))
3637 asoc = sctp_id2assoc(sk, authkey->sca_assoc_id);
3638 if (!asoc && authkey->sca_assoc_id > SCTP_ALL_ASSOC &&
3639 sctp_style(sk, UDP))
3643 ret = sctp_auth_set_key(ep, asoc, authkey);
3647 if (sctp_style(sk, TCP))
3648 authkey->sca_assoc_id = SCTP_FUTURE_ASSOC;
3650 if (authkey->sca_assoc_id == SCTP_FUTURE_ASSOC ||
3651 authkey->sca_assoc_id == SCTP_ALL_ASSOC) {
3652 ret = sctp_auth_set_key(ep, asoc, authkey);
3659 if (authkey->sca_assoc_id == SCTP_CURRENT_ASSOC ||
3660 authkey->sca_assoc_id == SCTP_ALL_ASSOC) {
3661 list_for_each_entry(asoc, &ep->asocs, asocs) {
3662 int res = sctp_auth_set_key(ep, asoc, authkey);
3670 memzero_explicit(authkey, optlen);
3675 * 7.1.21. Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY)
3677 * This option will get or set the active shared key to be used to build
3678 * the association shared key.
3680 static int sctp_setsockopt_active_key(struct sock *sk,
3681 struct sctp_authkeyid *val,
3682 unsigned int optlen)
3684 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
3685 struct sctp_association *asoc;
3688 if (optlen != sizeof(struct sctp_authkeyid))
3691 asoc = sctp_id2assoc(sk, val->scact_assoc_id);
3692 if (!asoc && val->scact_assoc_id > SCTP_ALL_ASSOC &&
3693 sctp_style(sk, UDP))
3697 return sctp_auth_set_active_key(ep, asoc, val->scact_keynumber);
3699 if (sctp_style(sk, TCP))
3700 val->scact_assoc_id = SCTP_FUTURE_ASSOC;
3702 if (val->scact_assoc_id == SCTP_FUTURE_ASSOC ||
3703 val->scact_assoc_id == SCTP_ALL_ASSOC) {
3704 ret = sctp_auth_set_active_key(ep, asoc, val->scact_keynumber);
3709 if (val->scact_assoc_id == SCTP_CURRENT_ASSOC ||
3710 val->scact_assoc_id == SCTP_ALL_ASSOC) {
3711 list_for_each_entry(asoc, &ep->asocs, asocs) {
3712 int res = sctp_auth_set_active_key(ep, asoc,
3713 val->scact_keynumber);
3724 * 7.1.22. Delete a shared key (SCTP_AUTH_DELETE_KEY)
3726 * This set option will delete a shared secret key from use.
3728 static int sctp_setsockopt_del_key(struct sock *sk,
3729 struct sctp_authkeyid *val,
3730 unsigned int optlen)
3732 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
3733 struct sctp_association *asoc;
3736 if (optlen != sizeof(struct sctp_authkeyid))
3739 asoc = sctp_id2assoc(sk, val->scact_assoc_id);
3740 if (!asoc && val->scact_assoc_id > SCTP_ALL_ASSOC &&
3741 sctp_style(sk, UDP))
3745 return sctp_auth_del_key_id(ep, asoc, val->scact_keynumber);
3747 if (sctp_style(sk, TCP))
3748 val->scact_assoc_id = SCTP_FUTURE_ASSOC;
3750 if (val->scact_assoc_id == SCTP_FUTURE_ASSOC ||
3751 val->scact_assoc_id == SCTP_ALL_ASSOC) {
3752 ret = sctp_auth_del_key_id(ep, asoc, val->scact_keynumber);
3757 if (val->scact_assoc_id == SCTP_CURRENT_ASSOC ||
3758 val->scact_assoc_id == SCTP_ALL_ASSOC) {
3759 list_for_each_entry(asoc, &ep->asocs, asocs) {
3760 int res = sctp_auth_del_key_id(ep, asoc,
3761 val->scact_keynumber);
3772 * 8.3.4 Deactivate a Shared Key (SCTP_AUTH_DEACTIVATE_KEY)
3774 * This set option will deactivate a shared secret key.
3776 static int sctp_setsockopt_deactivate_key(struct sock *sk,
3777 struct sctp_authkeyid *val,
3778 unsigned int optlen)
3780 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
3781 struct sctp_association *asoc;
3784 if (optlen != sizeof(struct sctp_authkeyid))
3787 asoc = sctp_id2assoc(sk, val->scact_assoc_id);
3788 if (!asoc && val->scact_assoc_id > SCTP_ALL_ASSOC &&
3789 sctp_style(sk, UDP))
3793 return sctp_auth_deact_key_id(ep, asoc, val->scact_keynumber);
3795 if (sctp_style(sk, TCP))
3796 val->scact_assoc_id = SCTP_FUTURE_ASSOC;
3798 if (val->scact_assoc_id == SCTP_FUTURE_ASSOC ||
3799 val->scact_assoc_id == SCTP_ALL_ASSOC) {
3800 ret = sctp_auth_deact_key_id(ep, asoc, val->scact_keynumber);
3805 if (val->scact_assoc_id == SCTP_CURRENT_ASSOC ||
3806 val->scact_assoc_id == SCTP_ALL_ASSOC) {
3807 list_for_each_entry(asoc, &ep->asocs, asocs) {
3808 int res = sctp_auth_deact_key_id(ep, asoc,
3809 val->scact_keynumber);
3820 * 8.1.23 SCTP_AUTO_ASCONF
3822 * This option will enable or disable the use of the automatic generation of
3823 * ASCONF chunks to add and delete addresses to an existing association. Note
3824 * that this option has two caveats namely: a) it only affects sockets that
3825 * are bound to all addresses available to the SCTP stack, and b) the system
3826 * administrator may have an overriding control that turns the ASCONF feature
3827 * off no matter what setting the socket option may have.
3828 * This option expects an integer boolean flag, where a non-zero value turns on
3829 * the option, and a zero value turns off the option.
3830 * Note. In this implementation, socket operation overrides default parameter
3831 * being set by sysctl as well as FreeBSD implementation
3833 static int sctp_setsockopt_auto_asconf(struct sock *sk, int *val,
3834 unsigned int optlen)
3836 struct sctp_sock *sp = sctp_sk(sk);
3838 if (optlen < sizeof(int))
3840 if (!sctp_is_ep_boundall(sk) && *val)
3842 if ((*val && sp->do_auto_asconf) || (!*val && !sp->do_auto_asconf))
3845 spin_lock_bh(&sock_net(sk)->sctp.addr_wq_lock);
3846 if (*val == 0 && sp->do_auto_asconf) {
3847 list_del(&sp->auto_asconf_list);
3848 sp->do_auto_asconf = 0;
3849 } else if (*val && !sp->do_auto_asconf) {
3850 list_add_tail(&sp->auto_asconf_list,
3851 &sock_net(sk)->sctp.auto_asconf_splist);
3852 sp->do_auto_asconf = 1;
3854 spin_unlock_bh(&sock_net(sk)->sctp.addr_wq_lock);
3859 * SCTP_PEER_ADDR_THLDS
3861 * This option allows us to alter the partially failed threshold for one or all
3862 * transports in an association. See Section 6.1 of:
3863 * http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txt
3865 static int sctp_setsockopt_paddr_thresholds(struct sock *sk,
3866 struct sctp_paddrthlds_v2 *val,
3867 unsigned int optlen, bool v2)
3869 struct sctp_transport *trans;
3870 struct sctp_association *asoc;
3873 len = v2 ? sizeof(*val) : sizeof(struct sctp_paddrthlds);
3877 if (v2 && val->spt_pathpfthld > val->spt_pathcpthld)
3880 if (!sctp_is_any(sk, (const union sctp_addr *)&val->spt_address)) {
3881 trans = sctp_addr_id2transport(sk, &val->spt_address,
3886 if (val->spt_pathmaxrxt)
3887 trans->pathmaxrxt = val->spt_pathmaxrxt;
3889 trans->ps_retrans = val->spt_pathcpthld;
3890 trans->pf_retrans = val->spt_pathpfthld;
3895 asoc = sctp_id2assoc(sk, val->spt_assoc_id);
3896 if (!asoc && val->spt_assoc_id != SCTP_FUTURE_ASSOC &&
3897 sctp_style(sk, UDP))
3901 list_for_each_entry(trans, &asoc->peer.transport_addr_list,
3903 if (val->spt_pathmaxrxt)
3904 trans->pathmaxrxt = val->spt_pathmaxrxt;
3906 trans->ps_retrans = val->spt_pathcpthld;
3907 trans->pf_retrans = val->spt_pathpfthld;
3910 if (val->spt_pathmaxrxt)
3911 asoc->pathmaxrxt = val->spt_pathmaxrxt;
3913 asoc->ps_retrans = val->spt_pathcpthld;
3914 asoc->pf_retrans = val->spt_pathpfthld;
3916 struct sctp_sock *sp = sctp_sk(sk);
3918 if (val->spt_pathmaxrxt)
3919 sp->pathmaxrxt = val->spt_pathmaxrxt;
3921 sp->ps_retrans = val->spt_pathcpthld;
3922 sp->pf_retrans = val->spt_pathpfthld;
3928 static int sctp_setsockopt_recvrcvinfo(struct sock *sk, int *val,
3929 unsigned int optlen)
3931 if (optlen < sizeof(int))
3934 sctp_sk(sk)->recvrcvinfo = (*val == 0) ? 0 : 1;
3939 static int sctp_setsockopt_recvnxtinfo(struct sock *sk, int *val,
3940 unsigned int optlen)
3942 if (optlen < sizeof(int))
3945 sctp_sk(sk)->recvnxtinfo = (*val == 0) ? 0 : 1;
3950 static int sctp_setsockopt_pr_supported(struct sock *sk,
3951 struct sctp_assoc_value *params,
3952 unsigned int optlen)
3954 struct sctp_association *asoc;
3956 if (optlen != sizeof(*params))
3959 asoc = sctp_id2assoc(sk, params->assoc_id);
3960 if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC &&
3961 sctp_style(sk, UDP))
3964 sctp_sk(sk)->ep->prsctp_enable = !!params->assoc_value;
3969 static int sctp_setsockopt_default_prinfo(struct sock *sk,
3970 struct sctp_default_prinfo *info,
3971 unsigned int optlen)
3973 struct sctp_sock *sp = sctp_sk(sk);
3974 struct sctp_association *asoc;
3975 int retval = -EINVAL;
3977 if (optlen != sizeof(*info))
3980 if (info->pr_policy & ~SCTP_PR_SCTP_MASK)
3983 if (info->pr_policy == SCTP_PR_SCTP_NONE)
3986 asoc = sctp_id2assoc(sk, info->pr_assoc_id);
3987 if (!asoc && info->pr_assoc_id > SCTP_ALL_ASSOC &&
3988 sctp_style(sk, UDP))
3994 SCTP_PR_SET_POLICY(asoc->default_flags, info->pr_policy);
3995 asoc->default_timetolive = info->pr_value;
3999 if (sctp_style(sk, TCP))
4000 info->pr_assoc_id = SCTP_FUTURE_ASSOC;
4002 if (info->pr_assoc_id == SCTP_FUTURE_ASSOC ||
4003 info->pr_assoc_id == SCTP_ALL_ASSOC) {
4004 SCTP_PR_SET_POLICY(sp->default_flags, info->pr_policy);
4005 sp->default_timetolive = info->pr_value;
4008 if (info->pr_assoc_id == SCTP_CURRENT_ASSOC ||
4009 info->pr_assoc_id == SCTP_ALL_ASSOC) {
4010 list_for_each_entry(asoc, &sp->ep->asocs, asocs) {
4011 SCTP_PR_SET_POLICY(asoc->default_flags,
4013 asoc->default_timetolive = info->pr_value;
4021 static int sctp_setsockopt_reconfig_supported(struct sock *sk,
4022 struct sctp_assoc_value *params,
4023 unsigned int optlen)
4025 struct sctp_association *asoc;
4026 int retval = -EINVAL;
4028 if (optlen != sizeof(*params))
4031 asoc = sctp_id2assoc(sk, params->assoc_id);
4032 if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC &&
4033 sctp_style(sk, UDP))
4036 sctp_sk(sk)->ep->reconf_enable = !!params->assoc_value;
4044 static int sctp_setsockopt_enable_strreset(struct sock *sk,
4045 struct sctp_assoc_value *params,
4046 unsigned int optlen)
4048 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
4049 struct sctp_association *asoc;
4050 int retval = -EINVAL;
4052 if (optlen != sizeof(*params))
4055 if (params->assoc_value & (~SCTP_ENABLE_STRRESET_MASK))
4058 asoc = sctp_id2assoc(sk, params->assoc_id);
4059 if (!asoc && params->assoc_id > SCTP_ALL_ASSOC &&
4060 sctp_style(sk, UDP))
4066 asoc->strreset_enable = params->assoc_value;
4070 if (sctp_style(sk, TCP))
4071 params->assoc_id = SCTP_FUTURE_ASSOC;
4073 if (params->assoc_id == SCTP_FUTURE_ASSOC ||
4074 params->assoc_id == SCTP_ALL_ASSOC)
4075 ep->strreset_enable = params->assoc_value;
4077 if (params->assoc_id == SCTP_CURRENT_ASSOC ||
4078 params->assoc_id == SCTP_ALL_ASSOC)
4079 list_for_each_entry(asoc, &ep->asocs, asocs)
4080 asoc->strreset_enable = params->assoc_value;
4086 static int sctp_setsockopt_reset_streams(struct sock *sk,
4087 struct sctp_reset_streams *params,
4088 unsigned int optlen)
4090 struct sctp_association *asoc;
4092 if (optlen < sizeof(*params))
4094 /* srs_number_streams is u16, so optlen can't be bigger than this. */
4095 optlen = min_t(unsigned int, optlen, USHRT_MAX +
4096 sizeof(__u16) * sizeof(*params));
4098 if (params->srs_number_streams * sizeof(__u16) >
4099 optlen - sizeof(*params))
4102 asoc = sctp_id2assoc(sk, params->srs_assoc_id);
4106 return sctp_send_reset_streams(asoc, params);
4109 static int sctp_setsockopt_reset_assoc(struct sock *sk, sctp_assoc_t *associd,
4110 unsigned int optlen)
4112 struct sctp_association *asoc;
4114 if (optlen != sizeof(*associd))
4117 asoc = sctp_id2assoc(sk, *associd);
4121 return sctp_send_reset_assoc(asoc);
4124 static int sctp_setsockopt_add_streams(struct sock *sk,
4125 struct sctp_add_streams *params,
4126 unsigned int optlen)
4128 struct sctp_association *asoc;
4130 if (optlen != sizeof(*params))
4133 asoc = sctp_id2assoc(sk, params->sas_assoc_id);
4137 return sctp_send_add_streams(asoc, params);
4140 static int sctp_setsockopt_scheduler(struct sock *sk,
4141 struct sctp_assoc_value *params,
4142 unsigned int optlen)
4144 struct sctp_sock *sp = sctp_sk(sk);
4145 struct sctp_association *asoc;
4148 if (optlen < sizeof(*params))
4151 if (params->assoc_value > SCTP_SS_MAX)
4154 asoc = sctp_id2assoc(sk, params->assoc_id);
4155 if (!asoc && params->assoc_id > SCTP_ALL_ASSOC &&
4156 sctp_style(sk, UDP))
4160 return sctp_sched_set_sched(asoc, params->assoc_value);
4162 if (sctp_style(sk, TCP))
4163 params->assoc_id = SCTP_FUTURE_ASSOC;
4165 if (params->assoc_id == SCTP_FUTURE_ASSOC ||
4166 params->assoc_id == SCTP_ALL_ASSOC)
4167 sp->default_ss = params->assoc_value;
4169 if (params->assoc_id == SCTP_CURRENT_ASSOC ||
4170 params->assoc_id == SCTP_ALL_ASSOC) {
4171 list_for_each_entry(asoc, &sp->ep->asocs, asocs) {
4172 int ret = sctp_sched_set_sched(asoc,
4173 params->assoc_value);
4183 static int sctp_setsockopt_scheduler_value(struct sock *sk,
4184 struct sctp_stream_value *params,
4185 unsigned int optlen)
4187 struct sctp_association *asoc;
4188 int retval = -EINVAL;
4190 if (optlen < sizeof(*params))
4193 asoc = sctp_id2assoc(sk, params->assoc_id);
4194 if (!asoc && params->assoc_id != SCTP_CURRENT_ASSOC &&
4195 sctp_style(sk, UDP))
4199 retval = sctp_sched_set_value(asoc, params->stream_id,
4200 params->stream_value, GFP_KERNEL);
4206 list_for_each_entry(asoc, &sctp_sk(sk)->ep->asocs, asocs) {
4207 int ret = sctp_sched_set_value(asoc, params->stream_id,
4208 params->stream_value,
4210 if (ret && !retval) /* try to return the 1st error. */
4218 static int sctp_setsockopt_interleaving_supported(struct sock *sk,
4219 struct sctp_assoc_value *p,
4220 unsigned int optlen)
4222 struct sctp_sock *sp = sctp_sk(sk);
4223 struct sctp_association *asoc;
4225 if (optlen < sizeof(*p))
4228 asoc = sctp_id2assoc(sk, p->assoc_id);
4229 if (!asoc && p->assoc_id != SCTP_FUTURE_ASSOC && sctp_style(sk, UDP))
4232 if (!sock_net(sk)->sctp.intl_enable || !sp->frag_interleave) {
4236 sp->ep->intl_enable = !!p->assoc_value;
4240 static int sctp_setsockopt_reuse_port(struct sock *sk, int *val,
4241 unsigned int optlen)
4243 if (!sctp_style(sk, TCP))
4246 if (sctp_sk(sk)->ep->base.bind_addr.port)
4249 if (optlen < sizeof(int))
4252 sctp_sk(sk)->reuse = !!*val;
4257 static int sctp_assoc_ulpevent_type_set(struct sctp_event *param,
4258 struct sctp_association *asoc)
4260 struct sctp_ulpevent *event;
4262 sctp_ulpevent_type_set(&asoc->subscribe, param->se_type, param->se_on);
4264 if (param->se_type == SCTP_SENDER_DRY_EVENT && param->se_on) {
4265 if (sctp_outq_is_empty(&asoc->outqueue)) {
4266 event = sctp_ulpevent_make_sender_dry_event(asoc,
4267 GFP_USER | __GFP_NOWARN);
4271 asoc->stream.si->enqueue_event(&asoc->ulpq, event);
4278 static int sctp_setsockopt_event(struct sock *sk, struct sctp_event *param,
4279 unsigned int optlen)
4281 struct sctp_sock *sp = sctp_sk(sk);
4282 struct sctp_association *asoc;
4285 if (optlen < sizeof(*param))
4288 if (param->se_type < SCTP_SN_TYPE_BASE ||
4289 param->se_type > SCTP_SN_TYPE_MAX)
4292 asoc = sctp_id2assoc(sk, param->se_assoc_id);
4293 if (!asoc && param->se_assoc_id > SCTP_ALL_ASSOC &&
4294 sctp_style(sk, UDP))
4298 return sctp_assoc_ulpevent_type_set(param, asoc);
4300 if (sctp_style(sk, TCP))
4301 param->se_assoc_id = SCTP_FUTURE_ASSOC;
4303 if (param->se_assoc_id == SCTP_FUTURE_ASSOC ||
4304 param->se_assoc_id == SCTP_ALL_ASSOC)
4305 sctp_ulpevent_type_set(&sp->subscribe,
4306 param->se_type, param->se_on);
4308 if (param->se_assoc_id == SCTP_CURRENT_ASSOC ||
4309 param->se_assoc_id == SCTP_ALL_ASSOC) {
4310 list_for_each_entry(asoc, &sp->ep->asocs, asocs) {
4311 int ret = sctp_assoc_ulpevent_type_set(param, asoc);
4321 static int sctp_setsockopt_asconf_supported(struct sock *sk,
4322 struct sctp_assoc_value *params,
4323 unsigned int optlen)
4325 struct sctp_association *asoc;
4326 struct sctp_endpoint *ep;
4327 int retval = -EINVAL;
4329 if (optlen != sizeof(*params))
4332 asoc = sctp_id2assoc(sk, params->assoc_id);
4333 if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC &&
4334 sctp_style(sk, UDP))
4337 ep = sctp_sk(sk)->ep;
4338 ep->asconf_enable = !!params->assoc_value;
4340 if (ep->asconf_enable && ep->auth_enable) {
4341 sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF);
4342 sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF_ACK);
4351 static int sctp_setsockopt_auth_supported(struct sock *sk,
4352 struct sctp_assoc_value *params,
4353 unsigned int optlen)
4355 struct sctp_association *asoc;
4356 struct sctp_endpoint *ep;
4357 int retval = -EINVAL;
4359 if (optlen != sizeof(*params))
4362 asoc = sctp_id2assoc(sk, params->assoc_id);
4363 if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC &&
4364 sctp_style(sk, UDP))
4367 ep = sctp_sk(sk)->ep;
4368 if (params->assoc_value) {
4369 retval = sctp_auth_init(ep, GFP_KERNEL);
4372 if (ep->asconf_enable) {
4373 sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF);
4374 sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF_ACK);
4378 ep->auth_enable = !!params->assoc_value;
4385 static int sctp_setsockopt_ecn_supported(struct sock *sk,
4386 struct sctp_assoc_value *params,
4387 unsigned int optlen)
4389 struct sctp_association *asoc;
4390 int retval = -EINVAL;
4392 if (optlen != sizeof(*params))
4395 asoc = sctp_id2assoc(sk, params->assoc_id);
4396 if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC &&
4397 sctp_style(sk, UDP))
4400 sctp_sk(sk)->ep->ecn_enable = !!params->assoc_value;
4407 static int sctp_setsockopt_pf_expose(struct sock *sk,
4408 struct sctp_assoc_value *params,
4409 unsigned int optlen)
4411 struct sctp_association *asoc;
4412 int retval = -EINVAL;
4414 if (optlen != sizeof(*params))
4417 if (params->assoc_value > SCTP_PF_EXPOSE_MAX)
4420 asoc = sctp_id2assoc(sk, params->assoc_id);
4421 if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC &&
4422 sctp_style(sk, UDP))
4426 asoc->pf_expose = params->assoc_value;
4428 sctp_sk(sk)->pf_expose = params->assoc_value;
4435 static int sctp_setsockopt_encap_port(struct sock *sk,
4436 struct sctp_udpencaps *encap,
4437 unsigned int optlen)
4439 struct sctp_association *asoc;
4440 struct sctp_transport *t;
4443 if (optlen != sizeof(*encap))
4446 /* If an address other than INADDR_ANY is specified, and
4447 * no transport is found, then the request is invalid.
4449 encap_port = (__force __be16)encap->sue_port;
4450 if (!sctp_is_any(sk, (union sctp_addr *)&encap->sue_address)) {
4451 t = sctp_addr_id2transport(sk, &encap->sue_address,
4452 encap->sue_assoc_id);
4456 t->encap_port = encap_port;
4460 /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
4461 * socket is a one to many style socket, and an association
4462 * was not found, then the id was invalid.
4464 asoc = sctp_id2assoc(sk, encap->sue_assoc_id);
4465 if (!asoc && encap->sue_assoc_id != SCTP_FUTURE_ASSOC &&
4466 sctp_style(sk, UDP))
4469 /* If changes are for association, also apply encap_port to
4473 list_for_each_entry(t, &asoc->peer.transport_addr_list,
4475 t->encap_port = encap_port;
4477 asoc->encap_port = encap_port;
4481 sctp_sk(sk)->encap_port = encap_port;
4485 static int sctp_setsockopt_probe_interval(struct sock *sk,
4486 struct sctp_probeinterval *params,
4487 unsigned int optlen)
4489 struct sctp_association *asoc;
4490 struct sctp_transport *t;
4491 __u32 probe_interval;
4493 if (optlen != sizeof(*params))
4496 probe_interval = params->spi_interval;
4497 if (probe_interval && probe_interval < SCTP_PROBE_TIMER_MIN)
4500 /* If an address other than INADDR_ANY is specified, and
4501 * no transport is found, then the request is invalid.
4503 if (!sctp_is_any(sk, (union sctp_addr *)¶ms->spi_address)) {
4504 t = sctp_addr_id2transport(sk, ¶ms->spi_address,
4505 params->spi_assoc_id);
4509 t->probe_interval = msecs_to_jiffies(probe_interval);
4510 sctp_transport_pl_reset(t);
4514 /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
4515 * socket is a one to many style socket, and an association
4516 * was not found, then the id was invalid.
4518 asoc = sctp_id2assoc(sk, params->spi_assoc_id);
4519 if (!asoc && params->spi_assoc_id != SCTP_FUTURE_ASSOC &&
4520 sctp_style(sk, UDP))
4523 /* If changes are for association, also apply probe_interval to
4527 list_for_each_entry(t, &asoc->peer.transport_addr_list, transports) {
4528 t->probe_interval = msecs_to_jiffies(probe_interval);
4529 sctp_transport_pl_reset(t);
4532 asoc->probe_interval = msecs_to_jiffies(probe_interval);
4536 sctp_sk(sk)->probe_interval = probe_interval;
4540 /* API 6.2 setsockopt(), getsockopt()
4542 * Applications use setsockopt() and getsockopt() to set or retrieve
4543 * socket options. Socket options are used to change the default
4544 * behavior of sockets calls. They are described in Section 7.
4548 * ret = getsockopt(int sd, int level, int optname, void __user *optval,
4549 * int __user *optlen);
4550 * ret = setsockopt(int sd, int level, int optname, const void __user *optval,
4553 * sd - the socket descript.
4554 * level - set to IPPROTO_SCTP for all SCTP options.
4555 * optname - the option name.
4556 * optval - the buffer to store the value of the option.
4557 * optlen - the size of the buffer.
4559 static int sctp_setsockopt(struct sock *sk, int level, int optname,
4560 sockptr_t optval, unsigned int optlen)
4565 pr_debug("%s: sk:%p, optname:%d\n", __func__, sk, optname);
4567 /* I can hardly begin to describe how wrong this is. This is
4568 * so broken as to be worse than useless. The API draft
4569 * REALLY is NOT helpful here... I am not convinced that the
4570 * semantics of setsockopt() with a level OTHER THAN SOL_SCTP
4571 * are at all well-founded.
4573 if (level != SOL_SCTP) {
4574 struct sctp_af *af = sctp_sk(sk)->pf->af;
4576 return af->setsockopt(sk, level, optname, optval, optlen);
4580 /* Trim it to the biggest size sctp sockopt may need if necessary */
4581 optlen = min_t(unsigned int, optlen,
4582 PAGE_ALIGN(USHRT_MAX +
4583 sizeof(__u16) * sizeof(struct sctp_reset_streams)));
4584 kopt = memdup_sockptr(optval, optlen);
4586 return PTR_ERR(kopt);
4592 case SCTP_SOCKOPT_BINDX_ADD:
4593 /* 'optlen' is the size of the addresses buffer. */
4594 retval = sctp_setsockopt_bindx(sk, kopt, optlen,
4595 SCTP_BINDX_ADD_ADDR);
4598 case SCTP_SOCKOPT_BINDX_REM:
4599 /* 'optlen' is the size of the addresses buffer. */
4600 retval = sctp_setsockopt_bindx(sk, kopt, optlen,
4601 SCTP_BINDX_REM_ADDR);
4604 case SCTP_SOCKOPT_CONNECTX_OLD:
4605 /* 'optlen' is the size of the addresses buffer. */
4606 retval = sctp_setsockopt_connectx_old(sk, kopt, optlen);
4609 case SCTP_SOCKOPT_CONNECTX:
4610 /* 'optlen' is the size of the addresses buffer. */
4611 retval = sctp_setsockopt_connectx(sk, kopt, optlen);
4614 case SCTP_DISABLE_FRAGMENTS:
4615 retval = sctp_setsockopt_disable_fragments(sk, kopt, optlen);
4619 retval = sctp_setsockopt_events(sk, kopt, optlen);
4622 case SCTP_AUTOCLOSE:
4623 retval = sctp_setsockopt_autoclose(sk, kopt, optlen);
4626 case SCTP_PEER_ADDR_PARAMS:
4627 retval = sctp_setsockopt_peer_addr_params(sk, kopt, optlen);
4630 case SCTP_DELAYED_SACK:
4631 retval = sctp_setsockopt_delayed_ack(sk, kopt, optlen);
4633 case SCTP_PARTIAL_DELIVERY_POINT:
4634 retval = sctp_setsockopt_partial_delivery_point(sk, kopt, optlen);
4638 retval = sctp_setsockopt_initmsg(sk, kopt, optlen);
4640 case SCTP_DEFAULT_SEND_PARAM:
4641 retval = sctp_setsockopt_default_send_param(sk, kopt, optlen);
4643 case SCTP_DEFAULT_SNDINFO:
4644 retval = sctp_setsockopt_default_sndinfo(sk, kopt, optlen);
4646 case SCTP_PRIMARY_ADDR:
4647 retval = sctp_setsockopt_primary_addr(sk, kopt, optlen);
4649 case SCTP_SET_PEER_PRIMARY_ADDR:
4650 retval = sctp_setsockopt_peer_primary_addr(sk, kopt, optlen);
4653 retval = sctp_setsockopt_nodelay(sk, kopt, optlen);
4656 retval = sctp_setsockopt_rtoinfo(sk, kopt, optlen);
4658 case SCTP_ASSOCINFO:
4659 retval = sctp_setsockopt_associnfo(sk, kopt, optlen);
4661 case SCTP_I_WANT_MAPPED_V4_ADDR:
4662 retval = sctp_setsockopt_mappedv4(sk, kopt, optlen);
4665 retval = sctp_setsockopt_maxseg(sk, kopt, optlen);
4667 case SCTP_ADAPTATION_LAYER:
4668 retval = sctp_setsockopt_adaptation_layer(sk, kopt, optlen);
4671 retval = sctp_setsockopt_context(sk, kopt, optlen);
4673 case SCTP_FRAGMENT_INTERLEAVE:
4674 retval = sctp_setsockopt_fragment_interleave(sk, kopt, optlen);
4676 case SCTP_MAX_BURST:
4677 retval = sctp_setsockopt_maxburst(sk, kopt, optlen);
4679 case SCTP_AUTH_CHUNK:
4680 retval = sctp_setsockopt_auth_chunk(sk, kopt, optlen);
4682 case SCTP_HMAC_IDENT:
4683 retval = sctp_setsockopt_hmac_ident(sk, kopt, optlen);
4686 retval = sctp_setsockopt_auth_key(sk, kopt, optlen);
4688 case SCTP_AUTH_ACTIVE_KEY:
4689 retval = sctp_setsockopt_active_key(sk, kopt, optlen);
4691 case SCTP_AUTH_DELETE_KEY:
4692 retval = sctp_setsockopt_del_key(sk, kopt, optlen);
4694 case SCTP_AUTH_DEACTIVATE_KEY:
4695 retval = sctp_setsockopt_deactivate_key(sk, kopt, optlen);
4697 case SCTP_AUTO_ASCONF:
4698 retval = sctp_setsockopt_auto_asconf(sk, kopt, optlen);
4700 case SCTP_PEER_ADDR_THLDS:
4701 retval = sctp_setsockopt_paddr_thresholds(sk, kopt, optlen,
4704 case SCTP_PEER_ADDR_THLDS_V2:
4705 retval = sctp_setsockopt_paddr_thresholds(sk, kopt, optlen,
4708 case SCTP_RECVRCVINFO:
4709 retval = sctp_setsockopt_recvrcvinfo(sk, kopt, optlen);
4711 case SCTP_RECVNXTINFO:
4712 retval = sctp_setsockopt_recvnxtinfo(sk, kopt, optlen);
4714 case SCTP_PR_SUPPORTED:
4715 retval = sctp_setsockopt_pr_supported(sk, kopt, optlen);
4717 case SCTP_DEFAULT_PRINFO:
4718 retval = sctp_setsockopt_default_prinfo(sk, kopt, optlen);
4720 case SCTP_RECONFIG_SUPPORTED:
4721 retval = sctp_setsockopt_reconfig_supported(sk, kopt, optlen);
4723 case SCTP_ENABLE_STREAM_RESET:
4724 retval = sctp_setsockopt_enable_strreset(sk, kopt, optlen);
4726 case SCTP_RESET_STREAMS:
4727 retval = sctp_setsockopt_reset_streams(sk, kopt, optlen);
4729 case SCTP_RESET_ASSOC:
4730 retval = sctp_setsockopt_reset_assoc(sk, kopt, optlen);
4732 case SCTP_ADD_STREAMS:
4733 retval = sctp_setsockopt_add_streams(sk, kopt, optlen);
4735 case SCTP_STREAM_SCHEDULER:
4736 retval = sctp_setsockopt_scheduler(sk, kopt, optlen);
4738 case SCTP_STREAM_SCHEDULER_VALUE:
4739 retval = sctp_setsockopt_scheduler_value(sk, kopt, optlen);
4741 case SCTP_INTERLEAVING_SUPPORTED:
4742 retval = sctp_setsockopt_interleaving_supported(sk, kopt,
4745 case SCTP_REUSE_PORT:
4746 retval = sctp_setsockopt_reuse_port(sk, kopt, optlen);
4749 retval = sctp_setsockopt_event(sk, kopt, optlen);
4751 case SCTP_ASCONF_SUPPORTED:
4752 retval = sctp_setsockopt_asconf_supported(sk, kopt, optlen);
4754 case SCTP_AUTH_SUPPORTED:
4755 retval = sctp_setsockopt_auth_supported(sk, kopt, optlen);
4757 case SCTP_ECN_SUPPORTED:
4758 retval = sctp_setsockopt_ecn_supported(sk, kopt, optlen);
4760 case SCTP_EXPOSE_POTENTIALLY_FAILED_STATE:
4761 retval = sctp_setsockopt_pf_expose(sk, kopt, optlen);
4763 case SCTP_REMOTE_UDP_ENCAPS_PORT:
4764 retval = sctp_setsockopt_encap_port(sk, kopt, optlen);
4766 case SCTP_PLPMTUD_PROBE_INTERVAL:
4767 retval = sctp_setsockopt_probe_interval(sk, kopt, optlen);
4770 retval = -ENOPROTOOPT;
4779 /* API 3.1.6 connect() - UDP Style Syntax
4781 * An application may use the connect() call in the UDP model to initiate an
4782 * association without sending data.
4786 * ret = connect(int sd, const struct sockaddr *nam, socklen_t len);
4788 * sd: the socket descriptor to have a new association added to.
4790 * nam: the address structure (either struct sockaddr_in or struct
4791 * sockaddr_in6 defined in RFC2553 [7]).
4793 * len: the size of the address.
4795 static int sctp_connect(struct sock *sk, struct sockaddr *addr,
4796 int addr_len, int flags)
4802 pr_debug("%s: sk:%p, sockaddr:%p, addr_len:%d\n", __func__, sk,
4805 /* Validate addr_len before calling common connect/connectx routine. */
4806 af = sctp_get_af_specific(addr->sa_family);
4807 if (af && addr_len >= af->sockaddr_len)
4808 err = __sctp_connect(sk, addr, af->sockaddr_len, flags, NULL);
4814 int sctp_inet_connect(struct socket *sock, struct sockaddr *uaddr,
4815 int addr_len, int flags)
4817 if (addr_len < sizeof(uaddr->sa_family))
4820 if (uaddr->sa_family == AF_UNSPEC)
4823 return sctp_connect(sock->sk, uaddr, addr_len, flags);
4826 /* FIXME: Write comments. */
4827 static int sctp_disconnect(struct sock *sk, int flags)
4829 return -EOPNOTSUPP; /* STUB */
4832 /* 4.1.4 accept() - TCP Style Syntax
4834 * Applications use accept() call to remove an established SCTP
4835 * association from the accept queue of the endpoint. A new socket
4836 * descriptor will be returned from accept() to represent the newly
4837 * formed association.
4839 static struct sock *sctp_accept(struct sock *sk, int flags, int *err, bool kern)
4841 struct sctp_sock *sp;
4842 struct sctp_endpoint *ep;
4843 struct sock *newsk = NULL;
4844 struct sctp_association *asoc;
4853 if (!sctp_style(sk, TCP)) {
4854 error = -EOPNOTSUPP;
4858 if (!sctp_sstate(sk, LISTENING)) {
4863 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
4865 error = sctp_wait_for_accept(sk, timeo);
4869 /* We treat the list of associations on the endpoint as the accept
4870 * queue and pick the first association on the list.
4872 asoc = list_entry(ep->asocs.next, struct sctp_association, asocs);
4874 newsk = sp->pf->create_accept_sk(sk, asoc, kern);
4880 /* Populate the fields of the newsk from the oldsk and migrate the
4881 * asoc to the newsk.
4883 error = sctp_sock_migrate(sk, newsk, asoc, SCTP_SOCKET_TCP);
4885 sk_common_release(newsk);
4895 /* The SCTP ioctl handler. */
4896 static int sctp_ioctl(struct sock *sk, int cmd, unsigned long arg)
4903 * SEQPACKET-style sockets in LISTENING state are valid, for
4904 * SCTP, so only discard TCP-style sockets in LISTENING state.
4906 if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))
4911 struct sk_buff *skb;
4912 unsigned int amount = 0;
4914 skb = skb_peek(&sk->sk_receive_queue);
4917 * We will only return the amount of this packet since
4918 * that is all that will be read.
4922 rc = put_user(amount, (int __user *)arg);
4934 /* This is the function which gets called during socket creation to
4935 * initialized the SCTP-specific portion of the sock.
4936 * The sock structure should already be zero-filled memory.
4938 static int sctp_init_sock(struct sock *sk)
4940 struct net *net = sock_net(sk);
4941 struct sctp_sock *sp;
4943 pr_debug("%s: sk:%p\n", __func__, sk);
4947 /* Initialize the SCTP per socket area. */
4948 switch (sk->sk_type) {
4949 case SOCK_SEQPACKET:
4950 sp->type = SCTP_SOCKET_UDP;
4953 sp->type = SCTP_SOCKET_TCP;
4956 return -ESOCKTNOSUPPORT;
4959 sk->sk_gso_type = SKB_GSO_SCTP;
4961 /* Initialize default send parameters. These parameters can be
4962 * modified with the SCTP_DEFAULT_SEND_PARAM socket option.
4964 sp->default_stream = 0;
4965 sp->default_ppid = 0;
4966 sp->default_flags = 0;
4967 sp->default_context = 0;
4968 sp->default_timetolive = 0;
4970 sp->default_rcv_context = 0;
4971 sp->max_burst = net->sctp.max_burst;
4973 sp->sctp_hmac_alg = net->sctp.sctp_hmac_alg;
4975 /* Initialize default setup parameters. These parameters
4976 * can be modified with the SCTP_INITMSG socket option or
4977 * overridden by the SCTP_INIT CMSG.
4979 sp->initmsg.sinit_num_ostreams = sctp_max_outstreams;
4980 sp->initmsg.sinit_max_instreams = sctp_max_instreams;
4981 sp->initmsg.sinit_max_attempts = net->sctp.max_retrans_init;
4982 sp->initmsg.sinit_max_init_timeo = net->sctp.rto_max;
4984 /* Initialize default RTO related parameters. These parameters can
4985 * be modified for with the SCTP_RTOINFO socket option.
4987 sp->rtoinfo.srto_initial = net->sctp.rto_initial;
4988 sp->rtoinfo.srto_max = net->sctp.rto_max;
4989 sp->rtoinfo.srto_min = net->sctp.rto_min;
4991 /* Initialize default association related parameters. These parameters
4992 * can be modified with the SCTP_ASSOCINFO socket option.
4994 sp->assocparams.sasoc_asocmaxrxt = net->sctp.max_retrans_association;
4995 sp->assocparams.sasoc_number_peer_destinations = 0;
4996 sp->assocparams.sasoc_peer_rwnd = 0;
4997 sp->assocparams.sasoc_local_rwnd = 0;
4998 sp->assocparams.sasoc_cookie_life = net->sctp.valid_cookie_life;
5000 /* Initialize default event subscriptions. By default, all the
5005 /* Default Peer Address Parameters. These defaults can
5006 * be modified via SCTP_PEER_ADDR_PARAMS
5008 sp->hbinterval = net->sctp.hb_interval;
5009 sp->udp_port = htons(net->sctp.udp_port);
5010 sp->encap_port = htons(net->sctp.encap_port);
5011 sp->pathmaxrxt = net->sctp.max_retrans_path;
5012 sp->pf_retrans = net->sctp.pf_retrans;
5013 sp->ps_retrans = net->sctp.ps_retrans;
5014 sp->pf_expose = net->sctp.pf_expose;
5015 sp->pathmtu = 0; /* allow default discovery */
5016 sp->sackdelay = net->sctp.sack_timeout;
5018 sp->param_flags = SPP_HB_ENABLE |
5020 SPP_SACKDELAY_ENABLE;
5021 sp->default_ss = SCTP_SS_DEFAULT;
5023 /* If enabled no SCTP message fragmentation will be performed.
5024 * Configure through SCTP_DISABLE_FRAGMENTS socket option.
5026 sp->disable_fragments = 0;
5028 /* Enable Nagle algorithm by default. */
5031 sp->recvrcvinfo = 0;
5032 sp->recvnxtinfo = 0;
5034 /* Enable by default. */
5037 /* Auto-close idle associations after the configured
5038 * number of seconds. A value of 0 disables this
5039 * feature. Configure through the SCTP_AUTOCLOSE socket option,
5040 * for UDP-style sockets only.
5044 /* User specified fragmentation limit. */
5047 sp->adaptation_ind = 0;
5049 sp->pf = sctp_get_pf_specific(sk->sk_family);
5051 /* Control variables for partial data delivery. */
5052 atomic_set(&sp->pd_mode, 0);
5053 skb_queue_head_init(&sp->pd_lobby);
5054 sp->frag_interleave = 0;
5055 sp->probe_interval = net->sctp.probe_interval;
5057 /* Create a per socket endpoint structure. Even if we
5058 * change the data structure relationships, this may still
5059 * be useful for storing pre-connect address information.
5061 sp->ep = sctp_endpoint_new(sk, GFP_KERNEL);
5067 sk->sk_destruct = sctp_destruct_sock;
5069 SCTP_DBG_OBJCNT_INC(sock);
5072 sk_sockets_allocated_inc(sk);
5073 sock_prot_inuse_add(net, sk->sk_prot, 1);
5080 /* Cleanup any SCTP per socket resources. Must be called with
5081 * sock_net(sk)->sctp.addr_wq_lock held if sp->do_auto_asconf is true
5083 static void sctp_destroy_sock(struct sock *sk)
5085 struct sctp_sock *sp;
5087 pr_debug("%s: sk:%p\n", __func__, sk);
5089 /* Release our hold on the endpoint. */
5091 /* This could happen during socket init, thus we bail out
5092 * early, since the rest of the below is not setup either.
5097 if (sp->do_auto_asconf) {
5098 sp->do_auto_asconf = 0;
5099 list_del(&sp->auto_asconf_list);
5101 sctp_endpoint_free(sp->ep);
5103 sk_sockets_allocated_dec(sk);
5104 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
5108 /* Triggered when there are no references on the socket anymore */
5109 static void sctp_destruct_sock(struct sock *sk)
5111 struct sctp_sock *sp = sctp_sk(sk);
5113 /* Free up the HMAC transform. */
5114 crypto_free_shash(sp->hmac);
5116 inet_sock_destruct(sk);
5119 /* API 4.1.7 shutdown() - TCP Style Syntax
5120 * int shutdown(int socket, int how);
5122 * sd - the socket descriptor of the association to be closed.
5123 * how - Specifies the type of shutdown. The values are
5126 * Disables further receive operations. No SCTP
5127 * protocol action is taken.
5129 * Disables further send operations, and initiates
5130 * the SCTP shutdown sequence.
5132 * Disables further send and receive operations
5133 * and initiates the SCTP shutdown sequence.
5135 static void sctp_shutdown(struct sock *sk, int how)
5137 struct net *net = sock_net(sk);
5138 struct sctp_endpoint *ep;
5140 if (!sctp_style(sk, TCP))
5143 ep = sctp_sk(sk)->ep;
5144 if (how & SEND_SHUTDOWN && !list_empty(&ep->asocs)) {
5145 struct sctp_association *asoc;
5147 inet_sk_set_state(sk, SCTP_SS_CLOSING);
5148 asoc = list_entry(ep->asocs.next,
5149 struct sctp_association, asocs);
5150 sctp_primitive_SHUTDOWN(net, asoc, NULL);
5154 int sctp_get_sctp_info(struct sock *sk, struct sctp_association *asoc,
5155 struct sctp_info *info)
5157 struct sctp_transport *prim;
5158 struct list_head *pos;
5161 memset(info, 0, sizeof(*info));
5163 struct sctp_sock *sp = sctp_sk(sk);
5165 info->sctpi_s_autoclose = sp->autoclose;
5166 info->sctpi_s_adaptation_ind = sp->adaptation_ind;
5167 info->sctpi_s_pd_point = sp->pd_point;
5168 info->sctpi_s_nodelay = sp->nodelay;
5169 info->sctpi_s_disable_fragments = sp->disable_fragments;
5170 info->sctpi_s_v4mapped = sp->v4mapped;
5171 info->sctpi_s_frag_interleave = sp->frag_interleave;
5172 info->sctpi_s_type = sp->type;
5177 info->sctpi_tag = asoc->c.my_vtag;
5178 info->sctpi_state = asoc->state;
5179 info->sctpi_rwnd = asoc->a_rwnd;
5180 info->sctpi_unackdata = asoc->unack_data;
5181 info->sctpi_penddata = sctp_tsnmap_pending(&asoc->peer.tsn_map);
5182 info->sctpi_instrms = asoc->stream.incnt;
5183 info->sctpi_outstrms = asoc->stream.outcnt;
5184 list_for_each(pos, &asoc->base.inqueue.in_chunk_list)
5185 info->sctpi_inqueue++;
5186 list_for_each(pos, &asoc->outqueue.out_chunk_list)
5187 info->sctpi_outqueue++;
5188 info->sctpi_overall_error = asoc->overall_error_count;
5189 info->sctpi_max_burst = asoc->max_burst;
5190 info->sctpi_maxseg = asoc->frag_point;
5191 info->sctpi_peer_rwnd = asoc->peer.rwnd;
5192 info->sctpi_peer_tag = asoc->c.peer_vtag;
5194 mask = asoc->peer.ecn_capable << 1;
5195 mask = (mask | asoc->peer.ipv4_address) << 1;
5196 mask = (mask | asoc->peer.ipv6_address) << 1;
5197 mask = (mask | asoc->peer.hostname_address) << 1;
5198 mask = (mask | asoc->peer.asconf_capable) << 1;
5199 mask = (mask | asoc->peer.prsctp_capable) << 1;
5200 mask = (mask | asoc->peer.auth_capable);
5201 info->sctpi_peer_capable = mask;
5202 mask = asoc->peer.sack_needed << 1;
5203 mask = (mask | asoc->peer.sack_generation) << 1;
5204 mask = (mask | asoc->peer.zero_window_announced);
5205 info->sctpi_peer_sack = mask;
5207 info->sctpi_isacks = asoc->stats.isacks;
5208 info->sctpi_osacks = asoc->stats.osacks;
5209 info->sctpi_opackets = asoc->stats.opackets;
5210 info->sctpi_ipackets = asoc->stats.ipackets;
5211 info->sctpi_rtxchunks = asoc->stats.rtxchunks;
5212 info->sctpi_outofseqtsns = asoc->stats.outofseqtsns;
5213 info->sctpi_idupchunks = asoc->stats.idupchunks;
5214 info->sctpi_gapcnt = asoc->stats.gapcnt;
5215 info->sctpi_ouodchunks = asoc->stats.ouodchunks;
5216 info->sctpi_iuodchunks = asoc->stats.iuodchunks;
5217 info->sctpi_oodchunks = asoc->stats.oodchunks;
5218 info->sctpi_iodchunks = asoc->stats.iodchunks;
5219 info->sctpi_octrlchunks = asoc->stats.octrlchunks;
5220 info->sctpi_ictrlchunks = asoc->stats.ictrlchunks;
5222 prim = asoc->peer.primary_path;
5223 memcpy(&info->sctpi_p_address, &prim->ipaddr, sizeof(prim->ipaddr));
5224 info->sctpi_p_state = prim->state;
5225 info->sctpi_p_cwnd = prim->cwnd;
5226 info->sctpi_p_srtt = prim->srtt;
5227 info->sctpi_p_rto = jiffies_to_msecs(prim->rto);
5228 info->sctpi_p_hbinterval = prim->hbinterval;
5229 info->sctpi_p_pathmaxrxt = prim->pathmaxrxt;
5230 info->sctpi_p_sackdelay = jiffies_to_msecs(prim->sackdelay);
5231 info->sctpi_p_ssthresh = prim->ssthresh;
5232 info->sctpi_p_partial_bytes_acked = prim->partial_bytes_acked;
5233 info->sctpi_p_flight_size = prim->flight_size;
5234 info->sctpi_p_error = prim->error_count;
5238 EXPORT_SYMBOL_GPL(sctp_get_sctp_info);
5240 /* use callback to avoid exporting the core structure */
5241 void sctp_transport_walk_start(struct rhashtable_iter *iter) __acquires(RCU)
5243 rhltable_walk_enter(&sctp_transport_hashtable, iter);
5245 rhashtable_walk_start(iter);
5248 void sctp_transport_walk_stop(struct rhashtable_iter *iter) __releases(RCU)
5250 rhashtable_walk_stop(iter);
5251 rhashtable_walk_exit(iter);
5254 struct sctp_transport *sctp_transport_get_next(struct net *net,
5255 struct rhashtable_iter *iter)
5257 struct sctp_transport *t;
5259 t = rhashtable_walk_next(iter);
5260 for (; t; t = rhashtable_walk_next(iter)) {
5262 if (PTR_ERR(t) == -EAGAIN)
5267 if (!sctp_transport_hold(t))
5270 if (net_eq(t->asoc->base.net, net) &&
5271 t->asoc->peer.primary_path == t)
5274 sctp_transport_put(t);
5280 struct sctp_transport *sctp_transport_get_idx(struct net *net,
5281 struct rhashtable_iter *iter,
5284 struct sctp_transport *t;
5287 return SEQ_START_TOKEN;
5289 while ((t = sctp_transport_get_next(net, iter)) && !IS_ERR(t)) {
5292 sctp_transport_put(t);
5298 int sctp_for_each_endpoint(int (*cb)(struct sctp_endpoint *, void *),
5302 struct sctp_ep_common *epb;
5303 struct sctp_hashbucket *head;
5305 for (head = sctp_ep_hashtable; hash < sctp_ep_hashsize;
5307 read_lock_bh(&head->lock);
5308 sctp_for_each_hentry(epb, &head->chain) {
5309 err = cb(sctp_ep(epb), p);
5313 read_unlock_bh(&head->lock);
5318 EXPORT_SYMBOL_GPL(sctp_for_each_endpoint);
5320 int sctp_transport_lookup_process(int (*cb)(struct sctp_transport *, void *),
5322 const union sctp_addr *laddr,
5323 const union sctp_addr *paddr, void *p)
5325 struct sctp_transport *transport;
5329 transport = sctp_addrs_lookup_transport(net, laddr, paddr);
5334 err = cb(transport, p);
5335 sctp_transport_put(transport);
5339 EXPORT_SYMBOL_GPL(sctp_transport_lookup_process);
5341 int sctp_for_each_transport(int (*cb)(struct sctp_transport *, void *),
5342 int (*cb_done)(struct sctp_transport *, void *),
5343 struct net *net, int *pos, void *p) {
5344 struct rhashtable_iter hti;
5345 struct sctp_transport *tsp;
5350 sctp_transport_walk_start(&hti);
5352 tsp = sctp_transport_get_idx(net, &hti, *pos + 1);
5353 for (; !IS_ERR_OR_NULL(tsp); tsp = sctp_transport_get_next(net, &hti)) {
5358 sctp_transport_put(tsp);
5360 sctp_transport_walk_stop(&hti);
5363 if (cb_done && !cb_done(tsp, p)) {
5365 sctp_transport_put(tsp);
5368 sctp_transport_put(tsp);
5373 EXPORT_SYMBOL_GPL(sctp_for_each_transport);
5375 /* 7.2.1 Association Status (SCTP_STATUS)
5377 * Applications can retrieve current status information about an
5378 * association, including association state, peer receiver window size,
5379 * number of unacked data chunks, and number of data chunks pending
5380 * receipt. This information is read-only.
5382 static int sctp_getsockopt_sctp_status(struct sock *sk, int len,
5383 char __user *optval,
5386 struct sctp_status status;
5387 struct sctp_association *asoc = NULL;
5388 struct sctp_transport *transport;
5389 sctp_assoc_t associd;
5392 if (len < sizeof(status)) {
5397 len = sizeof(status);
5398 if (copy_from_user(&status, optval, len)) {
5403 associd = status.sstat_assoc_id;
5404 asoc = sctp_id2assoc(sk, associd);
5410 transport = asoc->peer.primary_path;
5412 status.sstat_assoc_id = sctp_assoc2id(asoc);
5413 status.sstat_state = sctp_assoc_to_state(asoc);
5414 status.sstat_rwnd = asoc->peer.rwnd;
5415 status.sstat_unackdata = asoc->unack_data;
5417 status.sstat_penddata = sctp_tsnmap_pending(&asoc->peer.tsn_map);
5418 status.sstat_instrms = asoc->stream.incnt;
5419 status.sstat_outstrms = asoc->stream.outcnt;
5420 status.sstat_fragmentation_point = asoc->frag_point;
5421 status.sstat_primary.spinfo_assoc_id = sctp_assoc2id(transport->asoc);
5422 memcpy(&status.sstat_primary.spinfo_address, &transport->ipaddr,
5423 transport->af_specific->sockaddr_len);
5424 /* Map ipv4 address into v4-mapped-on-v6 address. */
5425 sctp_get_pf_specific(sk->sk_family)->addr_to_user(sctp_sk(sk),
5426 (union sctp_addr *)&status.sstat_primary.spinfo_address);
5427 status.sstat_primary.spinfo_state = transport->state;
5428 status.sstat_primary.spinfo_cwnd = transport->cwnd;
5429 status.sstat_primary.spinfo_srtt = transport->srtt;
5430 status.sstat_primary.spinfo_rto = jiffies_to_msecs(transport->rto);
5431 status.sstat_primary.spinfo_mtu = transport->pathmtu;
5433 if (status.sstat_primary.spinfo_state == SCTP_UNKNOWN)
5434 status.sstat_primary.spinfo_state = SCTP_ACTIVE;
5436 if (put_user(len, optlen)) {
5441 pr_debug("%s: len:%d, state:%d, rwnd:%d, assoc_id:%d\n",
5442 __func__, len, status.sstat_state, status.sstat_rwnd,
5443 status.sstat_assoc_id);
5445 if (copy_to_user(optval, &status, len)) {
5455 /* 7.2.2 Peer Address Information (SCTP_GET_PEER_ADDR_INFO)
5457 * Applications can retrieve information about a specific peer address
5458 * of an association, including its reachability state, congestion
5459 * window, and retransmission timer values. This information is
5462 static int sctp_getsockopt_peer_addr_info(struct sock *sk, int len,
5463 char __user *optval,
5466 struct sctp_paddrinfo pinfo;
5467 struct sctp_transport *transport;
5470 if (len < sizeof(pinfo)) {
5475 len = sizeof(pinfo);
5476 if (copy_from_user(&pinfo, optval, len)) {
5481 transport = sctp_addr_id2transport(sk, &pinfo.spinfo_address,
5482 pinfo.spinfo_assoc_id);
5488 if (transport->state == SCTP_PF &&
5489 transport->asoc->pf_expose == SCTP_PF_EXPOSE_DISABLE) {
5494 pinfo.spinfo_assoc_id = sctp_assoc2id(transport->asoc);
5495 pinfo.spinfo_state = transport->state;
5496 pinfo.spinfo_cwnd = transport->cwnd;
5497 pinfo.spinfo_srtt = transport->srtt;
5498 pinfo.spinfo_rto = jiffies_to_msecs(transport->rto);
5499 pinfo.spinfo_mtu = transport->pathmtu;
5501 if (pinfo.spinfo_state == SCTP_UNKNOWN)
5502 pinfo.spinfo_state = SCTP_ACTIVE;
5504 if (put_user(len, optlen)) {
5509 if (copy_to_user(optval, &pinfo, len)) {
5518 /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS)
5520 * This option is a on/off flag. If enabled no SCTP message
5521 * fragmentation will be performed. Instead if a message being sent
5522 * exceeds the current PMTU size, the message will NOT be sent and
5523 * instead a error will be indicated to the user.
5525 static int sctp_getsockopt_disable_fragments(struct sock *sk, int len,
5526 char __user *optval, int __user *optlen)
5530 if (len < sizeof(int))
5534 val = (sctp_sk(sk)->disable_fragments == 1);
5535 if (put_user(len, optlen))
5537 if (copy_to_user(optval, &val, len))
5542 /* 7.1.15 Set notification and ancillary events (SCTP_EVENTS)
5544 * This socket option is used to specify various notifications and
5545 * ancillary data the user wishes to receive.
5547 static int sctp_getsockopt_events(struct sock *sk, int len, char __user *optval,
5550 struct sctp_event_subscribe subscribe;
5551 __u8 *sn_type = (__u8 *)&subscribe;
5556 if (len > sizeof(struct sctp_event_subscribe))
5557 len = sizeof(struct sctp_event_subscribe);
5558 if (put_user(len, optlen))
5561 for (i = 0; i < len; i++)
5562 sn_type[i] = sctp_ulpevent_type_enabled(sctp_sk(sk)->subscribe,
5563 SCTP_SN_TYPE_BASE + i);
5565 if (copy_to_user(optval, &subscribe, len))
5571 /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE)
5573 * This socket option is applicable to the UDP-style socket only. When
5574 * set it will cause associations that are idle for more than the
5575 * specified number of seconds to automatically close. An association
5576 * being idle is defined an association that has NOT sent or received
5577 * user data. The special value of '0' indicates that no automatic
5578 * close of any associations should be performed. The option expects an
5579 * integer defining the number of seconds of idle time before an
5580 * association is closed.
5582 static int sctp_getsockopt_autoclose(struct sock *sk, int len, char __user *optval, int __user *optlen)
5584 /* Applicable to UDP-style socket only */
5585 if (sctp_style(sk, TCP))
5587 if (len < sizeof(int))
5590 if (put_user(len, optlen))
5592 if (put_user(sctp_sk(sk)->autoclose, (int __user *)optval))
5597 /* Helper routine to branch off an association to a new socket. */
5598 int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp)
5600 struct sctp_association *asoc = sctp_id2assoc(sk, id);
5601 struct sctp_sock *sp = sctp_sk(sk);
5602 struct socket *sock;
5605 /* Do not peel off from one netns to another one. */
5606 if (!net_eq(current->nsproxy->net_ns, sock_net(sk)))
5612 /* An association cannot be branched off from an already peeled-off
5613 * socket, nor is this supported for tcp style sockets.
5615 if (!sctp_style(sk, UDP))
5618 /* Create a new socket. */
5619 err = sock_create(sk->sk_family, SOCK_SEQPACKET, IPPROTO_SCTP, &sock);
5623 sctp_copy_sock(sock->sk, sk, asoc);
5625 /* Make peeled-off sockets more like 1-1 accepted sockets.
5626 * Set the daddr and initialize id to something more random and also
5627 * copy over any ip options.
5629 sp->pf->to_sk_daddr(&asoc->peer.primary_addr, sk);
5630 sp->pf->copy_ip_options(sk, sock->sk);
5632 /* Populate the fields of the newsk from the oldsk and migrate the
5633 * asoc to the newsk.
5635 err = sctp_sock_migrate(sk, sock->sk, asoc,
5636 SCTP_SOCKET_UDP_HIGH_BANDWIDTH);
5646 EXPORT_SYMBOL(sctp_do_peeloff);
5648 static int sctp_getsockopt_peeloff_common(struct sock *sk, sctp_peeloff_arg_t *peeloff,
5649 struct file **newfile, unsigned flags)
5651 struct socket *newsock;
5654 retval = sctp_do_peeloff(sk, peeloff->associd, &newsock);
5658 /* Map the socket to an unused fd that can be returned to the user. */
5659 retval = get_unused_fd_flags(flags & SOCK_CLOEXEC);
5661 sock_release(newsock);
5665 *newfile = sock_alloc_file(newsock, 0, NULL);
5666 if (IS_ERR(*newfile)) {
5667 put_unused_fd(retval);
5668 retval = PTR_ERR(*newfile);
5673 pr_debug("%s: sk:%p, newsk:%p, sd:%d\n", __func__, sk, newsock->sk,
5676 peeloff->sd = retval;
5678 if (flags & SOCK_NONBLOCK)
5679 (*newfile)->f_flags |= O_NONBLOCK;
5684 static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval, int __user *optlen)
5686 sctp_peeloff_arg_t peeloff;
5687 struct file *newfile = NULL;
5690 if (len < sizeof(sctp_peeloff_arg_t))
5692 len = sizeof(sctp_peeloff_arg_t);
5693 if (copy_from_user(&peeloff, optval, len))
5696 retval = sctp_getsockopt_peeloff_common(sk, &peeloff, &newfile, 0);
5700 /* Return the fd mapped to the new socket. */
5701 if (put_user(len, optlen)) {
5703 put_unused_fd(retval);
5707 if (copy_to_user(optval, &peeloff, len)) {
5709 put_unused_fd(retval);
5712 fd_install(retval, newfile);
5717 static int sctp_getsockopt_peeloff_flags(struct sock *sk, int len,
5718 char __user *optval, int __user *optlen)
5720 sctp_peeloff_flags_arg_t peeloff;
5721 struct file *newfile = NULL;
5724 if (len < sizeof(sctp_peeloff_flags_arg_t))
5726 len = sizeof(sctp_peeloff_flags_arg_t);
5727 if (copy_from_user(&peeloff, optval, len))
5730 retval = sctp_getsockopt_peeloff_common(sk, &peeloff.p_arg,
5731 &newfile, peeloff.flags);
5735 /* Return the fd mapped to the new socket. */
5736 if (put_user(len, optlen)) {
5738 put_unused_fd(retval);
5742 if (copy_to_user(optval, &peeloff, len)) {
5744 put_unused_fd(retval);
5747 fd_install(retval, newfile);
5752 /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS)
5754 * Applications can enable or disable heartbeats for any peer address of
5755 * an association, modify an address's heartbeat interval, force a
5756 * heartbeat to be sent immediately, and adjust the address's maximum
5757 * number of retransmissions sent before an address is considered
5758 * unreachable. The following structure is used to access and modify an
5759 * address's parameters:
5761 * struct sctp_paddrparams {
5762 * sctp_assoc_t spp_assoc_id;
5763 * struct sockaddr_storage spp_address;
5764 * uint32_t spp_hbinterval;
5765 * uint16_t spp_pathmaxrxt;
5766 * uint32_t spp_pathmtu;
5767 * uint32_t spp_sackdelay;
5768 * uint32_t spp_flags;
5771 * spp_assoc_id - (one-to-many style socket) This is filled in the
5772 * application, and identifies the association for
5774 * spp_address - This specifies which address is of interest.
5775 * spp_hbinterval - This contains the value of the heartbeat interval,
5776 * in milliseconds. If a value of zero
5777 * is present in this field then no changes are to
5778 * be made to this parameter.
5779 * spp_pathmaxrxt - This contains the maximum number of
5780 * retransmissions before this address shall be
5781 * considered unreachable. If a value of zero
5782 * is present in this field then no changes are to
5783 * be made to this parameter.
5784 * spp_pathmtu - When Path MTU discovery is disabled the value
5785 * specified here will be the "fixed" path mtu.
5786 * Note that if the spp_address field is empty
5787 * then all associations on this address will
5788 * have this fixed path mtu set upon them.
5790 * spp_sackdelay - When delayed sack is enabled, this value specifies
5791 * the number of milliseconds that sacks will be delayed
5792 * for. This value will apply to all addresses of an
5793 * association if the spp_address field is empty. Note
5794 * also, that if delayed sack is enabled and this
5795 * value is set to 0, no change is made to the last
5796 * recorded delayed sack timer value.
5798 * spp_flags - These flags are used to control various features
5799 * on an association. The flag field may contain
5800 * zero or more of the following options.
5802 * SPP_HB_ENABLE - Enable heartbeats on the
5803 * specified address. Note that if the address
5804 * field is empty all addresses for the association
5805 * have heartbeats enabled upon them.
5807 * SPP_HB_DISABLE - Disable heartbeats on the
5808 * speicifed address. Note that if the address
5809 * field is empty all addresses for the association
5810 * will have their heartbeats disabled. Note also
5811 * that SPP_HB_ENABLE and SPP_HB_DISABLE are
5812 * mutually exclusive, only one of these two should
5813 * be specified. Enabling both fields will have
5814 * undetermined results.
5816 * SPP_HB_DEMAND - Request a user initiated heartbeat
5817 * to be made immediately.
5819 * SPP_PMTUD_ENABLE - This field will enable PMTU
5820 * discovery upon the specified address. Note that
5821 * if the address feild is empty then all addresses
5822 * on the association are effected.
5824 * SPP_PMTUD_DISABLE - This field will disable PMTU
5825 * discovery upon the specified address. Note that
5826 * if the address feild is empty then all addresses
5827 * on the association are effected. Not also that
5828 * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually
5829 * exclusive. Enabling both will have undetermined
5832 * SPP_SACKDELAY_ENABLE - Setting this flag turns
5833 * on delayed sack. The time specified in spp_sackdelay
5834 * is used to specify the sack delay for this address. Note
5835 * that if spp_address is empty then all addresses will
5836 * enable delayed sack and take on the sack delay
5837 * value specified in spp_sackdelay.
5838 * SPP_SACKDELAY_DISABLE - Setting this flag turns
5839 * off delayed sack. If the spp_address field is blank then
5840 * delayed sack is disabled for the entire association. Note
5841 * also that this field is mutually exclusive to
5842 * SPP_SACKDELAY_ENABLE, setting both will have undefined
5845 * SPP_IPV6_FLOWLABEL: Setting this flag enables the
5846 * setting of the IPV6 flow label value. The value is
5847 * contained in the spp_ipv6_flowlabel field.
5848 * Upon retrieval, this flag will be set to indicate that
5849 * the spp_ipv6_flowlabel field has a valid value returned.
5850 * If a specific destination address is set (in the
5851 * spp_address field), then the value returned is that of
5852 * the address. If just an association is specified (and
5853 * no address), then the association's default flow label
5854 * is returned. If neither an association nor a destination
5855 * is specified, then the socket's default flow label is
5856 * returned. For non-IPv6 sockets, this flag will be left
5859 * SPP_DSCP: Setting this flag enables the setting of the
5860 * Differentiated Services Code Point (DSCP) value
5861 * associated with either the association or a specific
5862 * address. The value is obtained in the spp_dscp field.
5863 * Upon retrieval, this flag will be set to indicate that
5864 * the spp_dscp field has a valid value returned. If a
5865 * specific destination address is set when called (in the
5866 * spp_address field), then that specific destination
5867 * address's DSCP value is returned. If just an association
5868 * is specified, then the association's default DSCP is
5869 * returned. If neither an association nor a destination is
5870 * specified, then the socket's default DSCP is returned.
5872 * spp_ipv6_flowlabel
5873 * - This field is used in conjunction with the
5874 * SPP_IPV6_FLOWLABEL flag and contains the IPv6 flow label.
5875 * The 20 least significant bits are used for the flow
5876 * label. This setting has precedence over any IPv6-layer
5879 * spp_dscp - This field is used in conjunction with the SPP_DSCP flag
5880 * and contains the DSCP. The 6 most significant bits are
5881 * used for the DSCP. This setting has precedence over any
5882 * IPv4- or IPv6- layer setting.
5884 static int sctp_getsockopt_peer_addr_params(struct sock *sk, int len,
5885 char __user *optval, int __user *optlen)
5887 struct sctp_paddrparams params;
5888 struct sctp_transport *trans = NULL;
5889 struct sctp_association *asoc = NULL;
5890 struct sctp_sock *sp = sctp_sk(sk);
5892 if (len >= sizeof(params))
5893 len = sizeof(params);
5894 else if (len >= ALIGN(offsetof(struct sctp_paddrparams,
5895 spp_ipv6_flowlabel), 4))
5896 len = ALIGN(offsetof(struct sctp_paddrparams,
5897 spp_ipv6_flowlabel), 4);
5901 if (copy_from_user(¶ms, optval, len))
5904 /* If an address other than INADDR_ANY is specified, and
5905 * no transport is found, then the request is invalid.
5907 if (!sctp_is_any(sk, (union sctp_addr *)¶ms.spp_address)) {
5908 trans = sctp_addr_id2transport(sk, ¶ms.spp_address,
5909 params.spp_assoc_id);
5911 pr_debug("%s: failed no transport\n", __func__);
5916 /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
5917 * socket is a one to many style socket, and an association
5918 * was not found, then the id was invalid.
5920 asoc = sctp_id2assoc(sk, params.spp_assoc_id);
5921 if (!asoc && params.spp_assoc_id != SCTP_FUTURE_ASSOC &&
5922 sctp_style(sk, UDP)) {
5923 pr_debug("%s: failed no association\n", __func__);
5928 /* Fetch transport values. */
5929 params.spp_hbinterval = jiffies_to_msecs(trans->hbinterval);
5930 params.spp_pathmtu = trans->pathmtu;
5931 params.spp_pathmaxrxt = trans->pathmaxrxt;
5932 params.spp_sackdelay = jiffies_to_msecs(trans->sackdelay);
5934 /*draft-11 doesn't say what to return in spp_flags*/
5935 params.spp_flags = trans->param_flags;
5936 if (trans->flowlabel & SCTP_FLOWLABEL_SET_MASK) {
5937 params.spp_ipv6_flowlabel = trans->flowlabel &
5938 SCTP_FLOWLABEL_VAL_MASK;
5939 params.spp_flags |= SPP_IPV6_FLOWLABEL;
5941 if (trans->dscp & SCTP_DSCP_SET_MASK) {
5942 params.spp_dscp = trans->dscp & SCTP_DSCP_VAL_MASK;
5943 params.spp_flags |= SPP_DSCP;
5946 /* Fetch association values. */
5947 params.spp_hbinterval = jiffies_to_msecs(asoc->hbinterval);
5948 params.spp_pathmtu = asoc->pathmtu;
5949 params.spp_pathmaxrxt = asoc->pathmaxrxt;
5950 params.spp_sackdelay = jiffies_to_msecs(asoc->sackdelay);
5952 /*draft-11 doesn't say what to return in spp_flags*/
5953 params.spp_flags = asoc->param_flags;
5954 if (asoc->flowlabel & SCTP_FLOWLABEL_SET_MASK) {
5955 params.spp_ipv6_flowlabel = asoc->flowlabel &
5956 SCTP_FLOWLABEL_VAL_MASK;
5957 params.spp_flags |= SPP_IPV6_FLOWLABEL;
5959 if (asoc->dscp & SCTP_DSCP_SET_MASK) {
5960 params.spp_dscp = asoc->dscp & SCTP_DSCP_VAL_MASK;
5961 params.spp_flags |= SPP_DSCP;
5964 /* Fetch socket values. */
5965 params.spp_hbinterval = sp->hbinterval;
5966 params.spp_pathmtu = sp->pathmtu;
5967 params.spp_sackdelay = sp->sackdelay;
5968 params.spp_pathmaxrxt = sp->pathmaxrxt;
5970 /*draft-11 doesn't say what to return in spp_flags*/
5971 params.spp_flags = sp->param_flags;
5972 if (sp->flowlabel & SCTP_FLOWLABEL_SET_MASK) {
5973 params.spp_ipv6_flowlabel = sp->flowlabel &
5974 SCTP_FLOWLABEL_VAL_MASK;
5975 params.spp_flags |= SPP_IPV6_FLOWLABEL;
5977 if (sp->dscp & SCTP_DSCP_SET_MASK) {
5978 params.spp_dscp = sp->dscp & SCTP_DSCP_VAL_MASK;
5979 params.spp_flags |= SPP_DSCP;
5983 if (copy_to_user(optval, ¶ms, len))
5986 if (put_user(len, optlen))
5993 * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK)
5995 * This option will effect the way delayed acks are performed. This
5996 * option allows you to get or set the delayed ack time, in
5997 * milliseconds. It also allows changing the delayed ack frequency.
5998 * Changing the frequency to 1 disables the delayed sack algorithm. If
5999 * the assoc_id is 0, then this sets or gets the endpoints default
6000 * values. If the assoc_id field is non-zero, then the set or get
6001 * effects the specified association for the one to many model (the
6002 * assoc_id field is ignored by the one to one model). Note that if
6003 * sack_delay or sack_freq are 0 when setting this option, then the
6004 * current values will remain unchanged.
6006 * struct sctp_sack_info {
6007 * sctp_assoc_t sack_assoc_id;
6008 * uint32_t sack_delay;
6009 * uint32_t sack_freq;
6012 * sack_assoc_id - This parameter, indicates which association the user
6013 * is performing an action upon. Note that if this field's value is
6014 * zero then the endpoints default value is changed (effecting future
6015 * associations only).
6017 * sack_delay - This parameter contains the number of milliseconds that
6018 * the user is requesting the delayed ACK timer be set to. Note that
6019 * this value is defined in the standard to be between 200 and 500
6022 * sack_freq - This parameter contains the number of packets that must
6023 * be received before a sack is sent without waiting for the delay
6024 * timer to expire. The default value for this is 2, setting this
6025 * value to 1 will disable the delayed sack algorithm.
6027 static int sctp_getsockopt_delayed_ack(struct sock *sk, int len,
6028 char __user *optval,
6031 struct sctp_sack_info params;
6032 struct sctp_association *asoc = NULL;
6033 struct sctp_sock *sp = sctp_sk(sk);
6035 if (len >= sizeof(struct sctp_sack_info)) {
6036 len = sizeof(struct sctp_sack_info);
6038 if (copy_from_user(¶ms, optval, len))
6040 } else if (len == sizeof(struct sctp_assoc_value)) {
6041 pr_warn_ratelimited(DEPRECATED
6043 "Use of struct sctp_assoc_value in delayed_ack socket option.\n"
6044 "Use struct sctp_sack_info instead\n",
6045 current->comm, task_pid_nr(current));
6046 if (copy_from_user(¶ms, optval, len))
6051 /* Get association, if sack_assoc_id != SCTP_FUTURE_ASSOC and the
6052 * socket is a one to many style socket, and an association
6053 * was not found, then the id was invalid.
6055 asoc = sctp_id2assoc(sk, params.sack_assoc_id);
6056 if (!asoc && params.sack_assoc_id != SCTP_FUTURE_ASSOC &&
6057 sctp_style(sk, UDP))
6061 /* Fetch association values. */
6062 if (asoc->param_flags & SPP_SACKDELAY_ENABLE) {
6063 params.sack_delay = jiffies_to_msecs(asoc->sackdelay);
6064 params.sack_freq = asoc->sackfreq;
6067 params.sack_delay = 0;
6068 params.sack_freq = 1;
6071 /* Fetch socket values. */
6072 if (sp->param_flags & SPP_SACKDELAY_ENABLE) {
6073 params.sack_delay = sp->sackdelay;
6074 params.sack_freq = sp->sackfreq;
6076 params.sack_delay = 0;
6077 params.sack_freq = 1;
6081 if (copy_to_user(optval, ¶ms, len))
6084 if (put_user(len, optlen))
6090 /* 7.1.3 Initialization Parameters (SCTP_INITMSG)
6092 * Applications can specify protocol parameters for the default association
6093 * initialization. The option name argument to setsockopt() and getsockopt()
6096 * Setting initialization parameters is effective only on an unconnected
6097 * socket (for UDP-style sockets only future associations are effected
6098 * by the change). With TCP-style sockets, this option is inherited by
6099 * sockets derived from a listener socket.
6101 static int sctp_getsockopt_initmsg(struct sock *sk, int len, char __user *optval, int __user *optlen)
6103 if (len < sizeof(struct sctp_initmsg))
6105 len = sizeof(struct sctp_initmsg);
6106 if (put_user(len, optlen))
6108 if (copy_to_user(optval, &sctp_sk(sk)->initmsg, len))
6114 static int sctp_getsockopt_peer_addrs(struct sock *sk, int len,
6115 char __user *optval, int __user *optlen)
6117 struct sctp_association *asoc;
6119 struct sctp_getaddrs getaddrs;
6120 struct sctp_transport *from;
6122 union sctp_addr temp;
6123 struct sctp_sock *sp = sctp_sk(sk);
6128 if (len < sizeof(struct sctp_getaddrs))
6131 if (copy_from_user(&getaddrs, optval, sizeof(struct sctp_getaddrs)))
6134 /* For UDP-style sockets, id specifies the association to query. */
6135 asoc = sctp_id2assoc(sk, getaddrs.assoc_id);
6139 to = optval + offsetof(struct sctp_getaddrs, addrs);
6140 space_left = len - offsetof(struct sctp_getaddrs, addrs);
6142 list_for_each_entry(from, &asoc->peer.transport_addr_list,
6144 memcpy(&temp, &from->ipaddr, sizeof(temp));
6145 addrlen = sctp_get_pf_specific(sk->sk_family)
6146 ->addr_to_user(sp, &temp);
6147 if (space_left < addrlen)
6149 if (copy_to_user(to, &temp, addrlen))
6153 space_left -= addrlen;
6156 if (put_user(cnt, &((struct sctp_getaddrs __user *)optval)->addr_num))
6158 bytes_copied = ((char __user *)to) - optval;
6159 if (put_user(bytes_copied, optlen))
6165 static int sctp_copy_laddrs(struct sock *sk, __u16 port, void *to,
6166 size_t space_left, int *bytes_copied)
6168 struct sctp_sockaddr_entry *addr;
6169 union sctp_addr temp;
6172 struct net *net = sock_net(sk);
6175 list_for_each_entry_rcu(addr, &net->sctp.local_addr_list, list) {
6179 if ((PF_INET == sk->sk_family) &&
6180 (AF_INET6 == addr->a.sa.sa_family))
6182 if ((PF_INET6 == sk->sk_family) &&
6183 inet_v6_ipv6only(sk) &&
6184 (AF_INET == addr->a.sa.sa_family))
6186 memcpy(&temp, &addr->a, sizeof(temp));
6187 if (!temp.v4.sin_port)
6188 temp.v4.sin_port = htons(port);
6190 addrlen = sctp_get_pf_specific(sk->sk_family)
6191 ->addr_to_user(sctp_sk(sk), &temp);
6193 if (space_left < addrlen) {
6197 memcpy(to, &temp, addrlen);
6201 space_left -= addrlen;
6202 *bytes_copied += addrlen;
6210 static int sctp_getsockopt_local_addrs(struct sock *sk, int len,
6211 char __user *optval, int __user *optlen)
6213 struct sctp_bind_addr *bp;
6214 struct sctp_association *asoc;
6216 struct sctp_getaddrs getaddrs;
6217 struct sctp_sockaddr_entry *addr;
6219 union sctp_addr temp;
6220 struct sctp_sock *sp = sctp_sk(sk);
6224 int bytes_copied = 0;
6228 if (len < sizeof(struct sctp_getaddrs))
6231 if (copy_from_user(&getaddrs, optval, sizeof(struct sctp_getaddrs)))
6235 * For UDP-style sockets, id specifies the association to query.
6236 * If the id field is set to the value '0' then the locally bound
6237 * addresses are returned without regard to any particular
6240 if (0 == getaddrs.assoc_id) {
6241 bp = &sctp_sk(sk)->ep->base.bind_addr;
6243 asoc = sctp_id2assoc(sk, getaddrs.assoc_id);
6246 bp = &asoc->base.bind_addr;
6249 to = optval + offsetof(struct sctp_getaddrs, addrs);
6250 space_left = len - offsetof(struct sctp_getaddrs, addrs);
6252 addrs = kmalloc(space_left, GFP_USER | __GFP_NOWARN);
6256 /* If the endpoint is bound to 0.0.0.0 or ::0, get the valid
6257 * addresses from the global local address list.
6259 if (sctp_list_single_entry(&bp->address_list)) {
6260 addr = list_entry(bp->address_list.next,
6261 struct sctp_sockaddr_entry, list);
6262 if (sctp_is_any(sk, &addr->a)) {
6263 cnt = sctp_copy_laddrs(sk, bp->port, addrs,
6264 space_left, &bytes_copied);
6274 /* Protection on the bound address list is not needed since
6275 * in the socket option context we hold a socket lock and
6276 * thus the bound address list can't change.
6278 list_for_each_entry(addr, &bp->address_list, list) {
6279 memcpy(&temp, &addr->a, sizeof(temp));
6280 addrlen = sctp_get_pf_specific(sk->sk_family)
6281 ->addr_to_user(sp, &temp);
6282 if (space_left < addrlen) {
6283 err = -ENOMEM; /*fixme: right error?*/
6286 memcpy(buf, &temp, addrlen);
6288 bytes_copied += addrlen;
6290 space_left -= addrlen;
6294 if (copy_to_user(to, addrs, bytes_copied)) {
6298 if (put_user(cnt, &((struct sctp_getaddrs __user *)optval)->addr_num)) {
6302 /* XXX: We should have accounted for sizeof(struct sctp_getaddrs) too,
6303 * but we can't change it anymore.
6305 if (put_user(bytes_copied, optlen))
6312 /* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
6314 * Requests that the local SCTP stack use the enclosed peer address as
6315 * the association primary. The enclosed address must be one of the
6316 * association peer's addresses.
6318 static int sctp_getsockopt_primary_addr(struct sock *sk, int len,
6319 char __user *optval, int __user *optlen)
6321 struct sctp_prim prim;
6322 struct sctp_association *asoc;
6323 struct sctp_sock *sp = sctp_sk(sk);
6325 if (len < sizeof(struct sctp_prim))
6328 len = sizeof(struct sctp_prim);
6330 if (copy_from_user(&prim, optval, len))
6333 asoc = sctp_id2assoc(sk, prim.ssp_assoc_id);
6337 if (!asoc->peer.primary_path)
6340 memcpy(&prim.ssp_addr, &asoc->peer.primary_path->ipaddr,
6341 asoc->peer.primary_path->af_specific->sockaddr_len);
6343 sctp_get_pf_specific(sk->sk_family)->addr_to_user(sp,
6344 (union sctp_addr *)&prim.ssp_addr);
6346 if (put_user(len, optlen))
6348 if (copy_to_user(optval, &prim, len))
6355 * 7.1.11 Set Adaptation Layer Indicator (SCTP_ADAPTATION_LAYER)
6357 * Requests that the local endpoint set the specified Adaptation Layer
6358 * Indication parameter for all future INIT and INIT-ACK exchanges.
6360 static int sctp_getsockopt_adaptation_layer(struct sock *sk, int len,
6361 char __user *optval, int __user *optlen)
6363 struct sctp_setadaptation adaptation;
6365 if (len < sizeof(struct sctp_setadaptation))
6368 len = sizeof(struct sctp_setadaptation);
6370 adaptation.ssb_adaptation_ind = sctp_sk(sk)->adaptation_ind;
6372 if (put_user(len, optlen))
6374 if (copy_to_user(optval, &adaptation, len))
6382 * 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM)
6384 * Applications that wish to use the sendto() system call may wish to
6385 * specify a default set of parameters that would normally be supplied
6386 * through the inclusion of ancillary data. This socket option allows
6387 * such an application to set the default sctp_sndrcvinfo structure.
6390 * The application that wishes to use this socket option simply passes
6391 * in to this call the sctp_sndrcvinfo structure defined in Section
6392 * 5.2.2) The input parameters accepted by this call include
6393 * sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context,
6394 * sinfo_timetolive. The user must provide the sinfo_assoc_id field in
6395 * to this call if the caller is using the UDP model.
6397 * For getsockopt, it get the default sctp_sndrcvinfo structure.
6399 static int sctp_getsockopt_default_send_param(struct sock *sk,
6400 int len, char __user *optval,
6403 struct sctp_sock *sp = sctp_sk(sk);
6404 struct sctp_association *asoc;
6405 struct sctp_sndrcvinfo info;
6407 if (len < sizeof(info))
6412 if (copy_from_user(&info, optval, len))
6415 asoc = sctp_id2assoc(sk, info.sinfo_assoc_id);
6416 if (!asoc && info.sinfo_assoc_id != SCTP_FUTURE_ASSOC &&
6417 sctp_style(sk, UDP))
6421 info.sinfo_stream = asoc->default_stream;
6422 info.sinfo_flags = asoc->default_flags;
6423 info.sinfo_ppid = asoc->default_ppid;
6424 info.sinfo_context = asoc->default_context;
6425 info.sinfo_timetolive = asoc->default_timetolive;
6427 info.sinfo_stream = sp->default_stream;
6428 info.sinfo_flags = sp->default_flags;
6429 info.sinfo_ppid = sp->default_ppid;
6430 info.sinfo_context = sp->default_context;
6431 info.sinfo_timetolive = sp->default_timetolive;
6434 if (put_user(len, optlen))
6436 if (copy_to_user(optval, &info, len))
6442 /* RFC6458, Section 8.1.31. Set/get Default Send Parameters
6443 * (SCTP_DEFAULT_SNDINFO)
6445 static int sctp_getsockopt_default_sndinfo(struct sock *sk, int len,
6446 char __user *optval,
6449 struct sctp_sock *sp = sctp_sk(sk);
6450 struct sctp_association *asoc;
6451 struct sctp_sndinfo info;
6453 if (len < sizeof(info))
6458 if (copy_from_user(&info, optval, len))
6461 asoc = sctp_id2assoc(sk, info.snd_assoc_id);
6462 if (!asoc && info.snd_assoc_id != SCTP_FUTURE_ASSOC &&
6463 sctp_style(sk, UDP))
6467 info.snd_sid = asoc->default_stream;
6468 info.snd_flags = asoc->default_flags;
6469 info.snd_ppid = asoc->default_ppid;
6470 info.snd_context = asoc->default_context;
6472 info.snd_sid = sp->default_stream;
6473 info.snd_flags = sp->default_flags;
6474 info.snd_ppid = sp->default_ppid;
6475 info.snd_context = sp->default_context;
6478 if (put_user(len, optlen))
6480 if (copy_to_user(optval, &info, len))
6488 * 7.1.5 SCTP_NODELAY
6490 * Turn on/off any Nagle-like algorithm. This means that packets are
6491 * generally sent as soon as possible and no unnecessary delays are
6492 * introduced, at the cost of more packets in the network. Expects an
6493 * integer boolean flag.
6496 static int sctp_getsockopt_nodelay(struct sock *sk, int len,
6497 char __user *optval, int __user *optlen)
6501 if (len < sizeof(int))
6505 val = (sctp_sk(sk)->nodelay == 1);
6506 if (put_user(len, optlen))
6508 if (copy_to_user(optval, &val, len))
6515 * 7.1.1 SCTP_RTOINFO
6517 * The protocol parameters used to initialize and bound retransmission
6518 * timeout (RTO) are tunable. sctp_rtoinfo structure is used to access
6519 * and modify these parameters.
6520 * All parameters are time values, in milliseconds. A value of 0, when
6521 * modifying the parameters, indicates that the current value should not
6525 static int sctp_getsockopt_rtoinfo(struct sock *sk, int len,
6526 char __user *optval,
6527 int __user *optlen) {
6528 struct sctp_rtoinfo rtoinfo;
6529 struct sctp_association *asoc;
6531 if (len < sizeof (struct sctp_rtoinfo))
6534 len = sizeof(struct sctp_rtoinfo);
6536 if (copy_from_user(&rtoinfo, optval, len))
6539 asoc = sctp_id2assoc(sk, rtoinfo.srto_assoc_id);
6541 if (!asoc && rtoinfo.srto_assoc_id != SCTP_FUTURE_ASSOC &&
6542 sctp_style(sk, UDP))
6545 /* Values corresponding to the specific association. */
6547 rtoinfo.srto_initial = jiffies_to_msecs(asoc->rto_initial);
6548 rtoinfo.srto_max = jiffies_to_msecs(asoc->rto_max);
6549 rtoinfo.srto_min = jiffies_to_msecs(asoc->rto_min);
6551 /* Values corresponding to the endpoint. */
6552 struct sctp_sock *sp = sctp_sk(sk);
6554 rtoinfo.srto_initial = sp->rtoinfo.srto_initial;
6555 rtoinfo.srto_max = sp->rtoinfo.srto_max;
6556 rtoinfo.srto_min = sp->rtoinfo.srto_min;
6559 if (put_user(len, optlen))
6562 if (copy_to_user(optval, &rtoinfo, len))
6570 * 7.1.2 SCTP_ASSOCINFO
6572 * This option is used to tune the maximum retransmission attempts
6573 * of the association.
6574 * Returns an error if the new association retransmission value is
6575 * greater than the sum of the retransmission value of the peer.
6576 * See [SCTP] for more information.
6579 static int sctp_getsockopt_associnfo(struct sock *sk, int len,
6580 char __user *optval,
6584 struct sctp_assocparams assocparams;
6585 struct sctp_association *asoc;
6586 struct list_head *pos;
6589 if (len < sizeof (struct sctp_assocparams))
6592 len = sizeof(struct sctp_assocparams);
6594 if (copy_from_user(&assocparams, optval, len))
6597 asoc = sctp_id2assoc(sk, assocparams.sasoc_assoc_id);
6599 if (!asoc && assocparams.sasoc_assoc_id != SCTP_FUTURE_ASSOC &&
6600 sctp_style(sk, UDP))
6603 /* Values correspoinding to the specific association */
6605 assocparams.sasoc_asocmaxrxt = asoc->max_retrans;
6606 assocparams.sasoc_peer_rwnd = asoc->peer.rwnd;
6607 assocparams.sasoc_local_rwnd = asoc->a_rwnd;
6608 assocparams.sasoc_cookie_life = ktime_to_ms(asoc->cookie_life);
6610 list_for_each(pos, &asoc->peer.transport_addr_list) {
6614 assocparams.sasoc_number_peer_destinations = cnt;
6616 /* Values corresponding to the endpoint */
6617 struct sctp_sock *sp = sctp_sk(sk);
6619 assocparams.sasoc_asocmaxrxt = sp->assocparams.sasoc_asocmaxrxt;
6620 assocparams.sasoc_peer_rwnd = sp->assocparams.sasoc_peer_rwnd;
6621 assocparams.sasoc_local_rwnd = sp->assocparams.sasoc_local_rwnd;
6622 assocparams.sasoc_cookie_life =
6623 sp->assocparams.sasoc_cookie_life;
6624 assocparams.sasoc_number_peer_destinations =
6626 sasoc_number_peer_destinations;
6629 if (put_user(len, optlen))
6632 if (copy_to_user(optval, &assocparams, len))
6639 * 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR)
6641 * This socket option is a boolean flag which turns on or off mapped V4
6642 * addresses. If this option is turned on and the socket is type
6643 * PF_INET6, then IPv4 addresses will be mapped to V6 representation.
6644 * If this option is turned off, then no mapping will be done of V4
6645 * addresses and a user will receive both PF_INET6 and PF_INET type
6646 * addresses on the socket.
6648 static int sctp_getsockopt_mappedv4(struct sock *sk, int len,
6649 char __user *optval, int __user *optlen)
6652 struct sctp_sock *sp = sctp_sk(sk);
6654 if (len < sizeof(int))
6659 if (put_user(len, optlen))
6661 if (copy_to_user(optval, &val, len))
6668 * 7.1.29. Set or Get the default context (SCTP_CONTEXT)
6669 * (chapter and verse is quoted at sctp_setsockopt_context())
6671 static int sctp_getsockopt_context(struct sock *sk, int len,
6672 char __user *optval, int __user *optlen)
6674 struct sctp_assoc_value params;
6675 struct sctp_association *asoc;
6677 if (len < sizeof(struct sctp_assoc_value))
6680 len = sizeof(struct sctp_assoc_value);
6682 if (copy_from_user(¶ms, optval, len))
6685 asoc = sctp_id2assoc(sk, params.assoc_id);
6686 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
6687 sctp_style(sk, UDP))
6690 params.assoc_value = asoc ? asoc->default_rcv_context
6691 : sctp_sk(sk)->default_rcv_context;
6693 if (put_user(len, optlen))
6695 if (copy_to_user(optval, ¶ms, len))
6702 * 8.1.16. Get or Set the Maximum Fragmentation Size (SCTP_MAXSEG)
6703 * This option will get or set the maximum size to put in any outgoing
6704 * SCTP DATA chunk. If a message is larger than this size it will be
6705 * fragmented by SCTP into the specified size. Note that the underlying
6706 * SCTP implementation may fragment into smaller sized chunks when the
6707 * PMTU of the underlying association is smaller than the value set by
6708 * the user. The default value for this option is '0' which indicates
6709 * the user is NOT limiting fragmentation and only the PMTU will effect
6710 * SCTP's choice of DATA chunk size. Note also that values set larger
6711 * than the maximum size of an IP datagram will effectively let SCTP
6712 * control fragmentation (i.e. the same as setting this option to 0).
6714 * The following structure is used to access and modify this parameter:
6716 * struct sctp_assoc_value {
6717 * sctp_assoc_t assoc_id;
6718 * uint32_t assoc_value;
6721 * assoc_id: This parameter is ignored for one-to-one style sockets.
6722 * For one-to-many style sockets this parameter indicates which
6723 * association the user is performing an action upon. Note that if
6724 * this field's value is zero then the endpoints default value is
6725 * changed (effecting future associations only).
6726 * assoc_value: This parameter specifies the maximum size in bytes.
6728 static int sctp_getsockopt_maxseg(struct sock *sk, int len,
6729 char __user *optval, int __user *optlen)
6731 struct sctp_assoc_value params;
6732 struct sctp_association *asoc;
6734 if (len == sizeof(int)) {
6735 pr_warn_ratelimited(DEPRECATED
6737 "Use of int in maxseg socket option.\n"
6738 "Use struct sctp_assoc_value instead\n",
6739 current->comm, task_pid_nr(current));
6740 params.assoc_id = SCTP_FUTURE_ASSOC;
6741 } else if (len >= sizeof(struct sctp_assoc_value)) {
6742 len = sizeof(struct sctp_assoc_value);
6743 if (copy_from_user(¶ms, optval, len))
6748 asoc = sctp_id2assoc(sk, params.assoc_id);
6749 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
6750 sctp_style(sk, UDP))
6754 params.assoc_value = asoc->frag_point;
6756 params.assoc_value = sctp_sk(sk)->user_frag;
6758 if (put_user(len, optlen))
6760 if (len == sizeof(int)) {
6761 if (copy_to_user(optval, ¶ms.assoc_value, len))
6764 if (copy_to_user(optval, ¶ms, len))
6772 * 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE)
6773 * (chapter and verse is quoted at sctp_setsockopt_fragment_interleave())
6775 static int sctp_getsockopt_fragment_interleave(struct sock *sk, int len,
6776 char __user *optval, int __user *optlen)
6780 if (len < sizeof(int))
6785 val = sctp_sk(sk)->frag_interleave;
6786 if (put_user(len, optlen))
6788 if (copy_to_user(optval, &val, len))
6795 * 7.1.25. Set or Get the sctp partial delivery point
6796 * (chapter and verse is quoted at sctp_setsockopt_partial_delivery_point())
6798 static int sctp_getsockopt_partial_delivery_point(struct sock *sk, int len,
6799 char __user *optval,
6804 if (len < sizeof(u32))
6809 val = sctp_sk(sk)->pd_point;
6810 if (put_user(len, optlen))
6812 if (copy_to_user(optval, &val, len))
6819 * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST)
6820 * (chapter and verse is quoted at sctp_setsockopt_maxburst())
6822 static int sctp_getsockopt_maxburst(struct sock *sk, int len,
6823 char __user *optval,
6826 struct sctp_assoc_value params;
6827 struct sctp_association *asoc;
6829 if (len == sizeof(int)) {
6830 pr_warn_ratelimited(DEPRECATED
6832 "Use of int in max_burst socket option.\n"
6833 "Use struct sctp_assoc_value instead\n",
6834 current->comm, task_pid_nr(current));
6835 params.assoc_id = SCTP_FUTURE_ASSOC;
6836 } else if (len >= sizeof(struct sctp_assoc_value)) {
6837 len = sizeof(struct sctp_assoc_value);
6838 if (copy_from_user(¶ms, optval, len))
6843 asoc = sctp_id2assoc(sk, params.assoc_id);
6844 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
6845 sctp_style(sk, UDP))
6848 params.assoc_value = asoc ? asoc->max_burst : sctp_sk(sk)->max_burst;
6850 if (len == sizeof(int)) {
6851 if (copy_to_user(optval, ¶ms.assoc_value, len))
6854 if (copy_to_user(optval, ¶ms, len))
6862 static int sctp_getsockopt_hmac_ident(struct sock *sk, int len,
6863 char __user *optval, int __user *optlen)
6865 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
6866 struct sctp_hmacalgo __user *p = (void __user *)optval;
6867 struct sctp_hmac_algo_param *hmacs;
6872 if (!ep->auth_enable)
6875 hmacs = ep->auth_hmacs_list;
6876 data_len = ntohs(hmacs->param_hdr.length) -
6877 sizeof(struct sctp_paramhdr);
6879 if (len < sizeof(struct sctp_hmacalgo) + data_len)
6882 len = sizeof(struct sctp_hmacalgo) + data_len;
6883 num_idents = data_len / sizeof(u16);
6885 if (put_user(len, optlen))
6887 if (put_user(num_idents, &p->shmac_num_idents))
6889 for (i = 0; i < num_idents; i++) {
6890 __u16 hmacid = ntohs(hmacs->hmac_ids[i]);
6892 if (copy_to_user(&p->shmac_idents[i], &hmacid, sizeof(__u16)))
6898 static int sctp_getsockopt_active_key(struct sock *sk, int len,
6899 char __user *optval, int __user *optlen)
6901 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
6902 struct sctp_authkeyid val;
6903 struct sctp_association *asoc;
6905 if (len < sizeof(struct sctp_authkeyid))
6908 len = sizeof(struct sctp_authkeyid);
6909 if (copy_from_user(&val, optval, len))
6912 asoc = sctp_id2assoc(sk, val.scact_assoc_id);
6913 if (!asoc && val.scact_assoc_id && sctp_style(sk, UDP))
6917 if (!asoc->peer.auth_capable)
6919 val.scact_keynumber = asoc->active_key_id;
6921 if (!ep->auth_enable)
6923 val.scact_keynumber = ep->active_key_id;
6926 if (put_user(len, optlen))
6928 if (copy_to_user(optval, &val, len))
6934 static int sctp_getsockopt_peer_auth_chunks(struct sock *sk, int len,
6935 char __user *optval, int __user *optlen)
6937 struct sctp_authchunks __user *p = (void __user *)optval;
6938 struct sctp_authchunks val;
6939 struct sctp_association *asoc;
6940 struct sctp_chunks_param *ch;
6944 if (len < sizeof(struct sctp_authchunks))
6947 if (copy_from_user(&val, optval, sizeof(val)))
6950 to = p->gauth_chunks;
6951 asoc = sctp_id2assoc(sk, val.gauth_assoc_id);
6955 if (!asoc->peer.auth_capable)
6958 ch = asoc->peer.peer_chunks;
6962 /* See if the user provided enough room for all the data */
6963 num_chunks = ntohs(ch->param_hdr.length) - sizeof(struct sctp_paramhdr);
6964 if (len < num_chunks)
6967 if (copy_to_user(to, ch->chunks, num_chunks))
6970 len = sizeof(struct sctp_authchunks) + num_chunks;
6971 if (put_user(len, optlen))
6973 if (put_user(num_chunks, &p->gauth_number_of_chunks))
6978 static int sctp_getsockopt_local_auth_chunks(struct sock *sk, int len,
6979 char __user *optval, int __user *optlen)
6981 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
6982 struct sctp_authchunks __user *p = (void __user *)optval;
6983 struct sctp_authchunks val;
6984 struct sctp_association *asoc;
6985 struct sctp_chunks_param *ch;
6989 if (len < sizeof(struct sctp_authchunks))
6992 if (copy_from_user(&val, optval, sizeof(val)))
6995 to = p->gauth_chunks;
6996 asoc = sctp_id2assoc(sk, val.gauth_assoc_id);
6997 if (!asoc && val.gauth_assoc_id != SCTP_FUTURE_ASSOC &&
6998 sctp_style(sk, UDP))
7002 if (!asoc->peer.auth_capable)
7004 ch = (struct sctp_chunks_param *)asoc->c.auth_chunks;
7006 if (!ep->auth_enable)
7008 ch = ep->auth_chunk_list;
7013 num_chunks = ntohs(ch->param_hdr.length) - sizeof(struct sctp_paramhdr);
7014 if (len < sizeof(struct sctp_authchunks) + num_chunks)
7017 if (copy_to_user(to, ch->chunks, num_chunks))
7020 len = sizeof(struct sctp_authchunks) + num_chunks;
7021 if (put_user(len, optlen))
7023 if (put_user(num_chunks, &p->gauth_number_of_chunks))
7030 * 8.2.5. Get the Current Number of Associations (SCTP_GET_ASSOC_NUMBER)
7031 * This option gets the current number of associations that are attached
7032 * to a one-to-many style socket. The option value is an uint32_t.
7034 static int sctp_getsockopt_assoc_number(struct sock *sk, int len,
7035 char __user *optval, int __user *optlen)
7037 struct sctp_sock *sp = sctp_sk(sk);
7038 struct sctp_association *asoc;
7041 if (sctp_style(sk, TCP))
7044 if (len < sizeof(u32))
7049 list_for_each_entry(asoc, &(sp->ep->asocs), asocs) {
7053 if (put_user(len, optlen))
7055 if (copy_to_user(optval, &val, len))
7062 * 8.1.23 SCTP_AUTO_ASCONF
7063 * See the corresponding setsockopt entry as description
7065 static int sctp_getsockopt_auto_asconf(struct sock *sk, int len,
7066 char __user *optval, int __user *optlen)
7070 if (len < sizeof(int))
7074 if (sctp_sk(sk)->do_auto_asconf && sctp_is_ep_boundall(sk))
7076 if (put_user(len, optlen))
7078 if (copy_to_user(optval, &val, len))
7084 * 8.2.6. Get the Current Identifiers of Associations
7085 * (SCTP_GET_ASSOC_ID_LIST)
7087 * This option gets the current list of SCTP association identifiers of
7088 * the SCTP associations handled by a one-to-many style socket.
7090 static int sctp_getsockopt_assoc_ids(struct sock *sk, int len,
7091 char __user *optval, int __user *optlen)
7093 struct sctp_sock *sp = sctp_sk(sk);
7094 struct sctp_association *asoc;
7095 struct sctp_assoc_ids *ids;
7098 if (sctp_style(sk, TCP))
7101 if (len < sizeof(struct sctp_assoc_ids))
7104 list_for_each_entry(asoc, &(sp->ep->asocs), asocs) {
7108 if (len < sizeof(struct sctp_assoc_ids) + sizeof(sctp_assoc_t) * num)
7111 len = sizeof(struct sctp_assoc_ids) + sizeof(sctp_assoc_t) * num;
7113 ids = kmalloc(len, GFP_USER | __GFP_NOWARN);
7117 ids->gaids_number_of_ids = num;
7119 list_for_each_entry(asoc, &(sp->ep->asocs), asocs) {
7120 ids->gaids_assoc_id[num++] = asoc->assoc_id;
7123 if (put_user(len, optlen) || copy_to_user(optval, ids, len)) {
7133 * SCTP_PEER_ADDR_THLDS
7135 * This option allows us to fetch the partially failed threshold for one or all
7136 * transports in an association. See Section 6.1 of:
7137 * http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txt
7139 static int sctp_getsockopt_paddr_thresholds(struct sock *sk,
7140 char __user *optval, int len,
7141 int __user *optlen, bool v2)
7143 struct sctp_paddrthlds_v2 val;
7144 struct sctp_transport *trans;
7145 struct sctp_association *asoc;
7148 min = v2 ? sizeof(val) : sizeof(struct sctp_paddrthlds);
7152 if (copy_from_user(&val, optval, len))
7155 if (!sctp_is_any(sk, (const union sctp_addr *)&val.spt_address)) {
7156 trans = sctp_addr_id2transport(sk, &val.spt_address,
7161 val.spt_pathmaxrxt = trans->pathmaxrxt;
7162 val.spt_pathpfthld = trans->pf_retrans;
7163 val.spt_pathcpthld = trans->ps_retrans;
7168 asoc = sctp_id2assoc(sk, val.spt_assoc_id);
7169 if (!asoc && val.spt_assoc_id != SCTP_FUTURE_ASSOC &&
7170 sctp_style(sk, UDP))
7174 val.spt_pathpfthld = asoc->pf_retrans;
7175 val.spt_pathmaxrxt = asoc->pathmaxrxt;
7176 val.spt_pathcpthld = asoc->ps_retrans;
7178 struct sctp_sock *sp = sctp_sk(sk);
7180 val.spt_pathpfthld = sp->pf_retrans;
7181 val.spt_pathmaxrxt = sp->pathmaxrxt;
7182 val.spt_pathcpthld = sp->ps_retrans;
7186 if (put_user(len, optlen) || copy_to_user(optval, &val, len))
7193 * SCTP_GET_ASSOC_STATS
7195 * This option retrieves local per endpoint statistics. It is modeled
7196 * after OpenSolaris' implementation
7198 static int sctp_getsockopt_assoc_stats(struct sock *sk, int len,
7199 char __user *optval,
7202 struct sctp_assoc_stats sas;
7203 struct sctp_association *asoc = NULL;
7205 /* User must provide at least the assoc id */
7206 if (len < sizeof(sctp_assoc_t))
7209 /* Allow the struct to grow and fill in as much as possible */
7210 len = min_t(size_t, len, sizeof(sas));
7212 if (copy_from_user(&sas, optval, len))
7215 asoc = sctp_id2assoc(sk, sas.sas_assoc_id);
7219 sas.sas_rtxchunks = asoc->stats.rtxchunks;
7220 sas.sas_gapcnt = asoc->stats.gapcnt;
7221 sas.sas_outofseqtsns = asoc->stats.outofseqtsns;
7222 sas.sas_osacks = asoc->stats.osacks;
7223 sas.sas_isacks = asoc->stats.isacks;
7224 sas.sas_octrlchunks = asoc->stats.octrlchunks;
7225 sas.sas_ictrlchunks = asoc->stats.ictrlchunks;
7226 sas.sas_oodchunks = asoc->stats.oodchunks;
7227 sas.sas_iodchunks = asoc->stats.iodchunks;
7228 sas.sas_ouodchunks = asoc->stats.ouodchunks;
7229 sas.sas_iuodchunks = asoc->stats.iuodchunks;
7230 sas.sas_idupchunks = asoc->stats.idupchunks;
7231 sas.sas_opackets = asoc->stats.opackets;
7232 sas.sas_ipackets = asoc->stats.ipackets;
7234 /* New high max rto observed, will return 0 if not a single
7235 * RTO update took place. obs_rto_ipaddr will be bogus
7238 sas.sas_maxrto = asoc->stats.max_obs_rto;
7239 memcpy(&sas.sas_obs_rto_ipaddr, &asoc->stats.obs_rto_ipaddr,
7240 sizeof(struct sockaddr_storage));
7242 /* Mark beginning of a new observation period */
7243 asoc->stats.max_obs_rto = asoc->rto_min;
7245 if (put_user(len, optlen))
7248 pr_debug("%s: len:%d, assoc_id:%d\n", __func__, len, sas.sas_assoc_id);
7250 if (copy_to_user(optval, &sas, len))
7256 static int sctp_getsockopt_recvrcvinfo(struct sock *sk, int len,
7257 char __user *optval,
7262 if (len < sizeof(int))
7266 if (sctp_sk(sk)->recvrcvinfo)
7268 if (put_user(len, optlen))
7270 if (copy_to_user(optval, &val, len))
7276 static int sctp_getsockopt_recvnxtinfo(struct sock *sk, int len,
7277 char __user *optval,
7282 if (len < sizeof(int))
7286 if (sctp_sk(sk)->recvnxtinfo)
7288 if (put_user(len, optlen))
7290 if (copy_to_user(optval, &val, len))
7296 static int sctp_getsockopt_pr_supported(struct sock *sk, int len,
7297 char __user *optval,
7300 struct sctp_assoc_value params;
7301 struct sctp_association *asoc;
7302 int retval = -EFAULT;
7304 if (len < sizeof(params)) {
7309 len = sizeof(params);
7310 if (copy_from_user(¶ms, optval, len))
7313 asoc = sctp_id2assoc(sk, params.assoc_id);
7314 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7315 sctp_style(sk, UDP)) {
7320 params.assoc_value = asoc ? asoc->peer.prsctp_capable
7321 : sctp_sk(sk)->ep->prsctp_enable;
7323 if (put_user(len, optlen))
7326 if (copy_to_user(optval, ¶ms, len))
7335 static int sctp_getsockopt_default_prinfo(struct sock *sk, int len,
7336 char __user *optval,
7339 struct sctp_default_prinfo info;
7340 struct sctp_association *asoc;
7341 int retval = -EFAULT;
7343 if (len < sizeof(info)) {
7349 if (copy_from_user(&info, optval, len))
7352 asoc = sctp_id2assoc(sk, info.pr_assoc_id);
7353 if (!asoc && info.pr_assoc_id != SCTP_FUTURE_ASSOC &&
7354 sctp_style(sk, UDP)) {
7360 info.pr_policy = SCTP_PR_POLICY(asoc->default_flags);
7361 info.pr_value = asoc->default_timetolive;
7363 struct sctp_sock *sp = sctp_sk(sk);
7365 info.pr_policy = SCTP_PR_POLICY(sp->default_flags);
7366 info.pr_value = sp->default_timetolive;
7369 if (put_user(len, optlen))
7372 if (copy_to_user(optval, &info, len))
7381 static int sctp_getsockopt_pr_assocstatus(struct sock *sk, int len,
7382 char __user *optval,
7385 struct sctp_prstatus params;
7386 struct sctp_association *asoc;
7388 int retval = -EINVAL;
7390 if (len < sizeof(params))
7393 len = sizeof(params);
7394 if (copy_from_user(¶ms, optval, len)) {
7399 policy = params.sprstat_policy;
7400 if (!policy || (policy & ~(SCTP_PR_SCTP_MASK | SCTP_PR_SCTP_ALL)) ||
7401 ((policy & SCTP_PR_SCTP_ALL) && (policy & SCTP_PR_SCTP_MASK)))
7404 asoc = sctp_id2assoc(sk, params.sprstat_assoc_id);
7408 if (policy == SCTP_PR_SCTP_ALL) {
7409 params.sprstat_abandoned_unsent = 0;
7410 params.sprstat_abandoned_sent = 0;
7411 for (policy = 0; policy <= SCTP_PR_INDEX(MAX); policy++) {
7412 params.sprstat_abandoned_unsent +=
7413 asoc->abandoned_unsent[policy];
7414 params.sprstat_abandoned_sent +=
7415 asoc->abandoned_sent[policy];
7418 params.sprstat_abandoned_unsent =
7419 asoc->abandoned_unsent[__SCTP_PR_INDEX(policy)];
7420 params.sprstat_abandoned_sent =
7421 asoc->abandoned_sent[__SCTP_PR_INDEX(policy)];
7424 if (put_user(len, optlen)) {
7429 if (copy_to_user(optval, ¶ms, len)) {
7440 static int sctp_getsockopt_pr_streamstatus(struct sock *sk, int len,
7441 char __user *optval,
7444 struct sctp_stream_out_ext *streamoute;
7445 struct sctp_association *asoc;
7446 struct sctp_prstatus params;
7447 int retval = -EINVAL;
7450 if (len < sizeof(params))
7453 len = sizeof(params);
7454 if (copy_from_user(¶ms, optval, len)) {
7459 policy = params.sprstat_policy;
7460 if (!policy || (policy & ~(SCTP_PR_SCTP_MASK | SCTP_PR_SCTP_ALL)) ||
7461 ((policy & SCTP_PR_SCTP_ALL) && (policy & SCTP_PR_SCTP_MASK)))
7464 asoc = sctp_id2assoc(sk, params.sprstat_assoc_id);
7465 if (!asoc || params.sprstat_sid >= asoc->stream.outcnt)
7468 streamoute = SCTP_SO(&asoc->stream, params.sprstat_sid)->ext;
7470 /* Not allocated yet, means all stats are 0 */
7471 params.sprstat_abandoned_unsent = 0;
7472 params.sprstat_abandoned_sent = 0;
7477 if (policy == SCTP_PR_SCTP_ALL) {
7478 params.sprstat_abandoned_unsent = 0;
7479 params.sprstat_abandoned_sent = 0;
7480 for (policy = 0; policy <= SCTP_PR_INDEX(MAX); policy++) {
7481 params.sprstat_abandoned_unsent +=
7482 streamoute->abandoned_unsent[policy];
7483 params.sprstat_abandoned_sent +=
7484 streamoute->abandoned_sent[policy];
7487 params.sprstat_abandoned_unsent =
7488 streamoute->abandoned_unsent[__SCTP_PR_INDEX(policy)];
7489 params.sprstat_abandoned_sent =
7490 streamoute->abandoned_sent[__SCTP_PR_INDEX(policy)];
7493 if (put_user(len, optlen) || copy_to_user(optval, ¶ms, len)) {
7504 static int sctp_getsockopt_reconfig_supported(struct sock *sk, int len,
7505 char __user *optval,
7508 struct sctp_assoc_value params;
7509 struct sctp_association *asoc;
7510 int retval = -EFAULT;
7512 if (len < sizeof(params)) {
7517 len = sizeof(params);
7518 if (copy_from_user(¶ms, optval, len))
7521 asoc = sctp_id2assoc(sk, params.assoc_id);
7522 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7523 sctp_style(sk, UDP)) {
7528 params.assoc_value = asoc ? asoc->peer.reconf_capable
7529 : sctp_sk(sk)->ep->reconf_enable;
7531 if (put_user(len, optlen))
7534 if (copy_to_user(optval, ¶ms, len))
7543 static int sctp_getsockopt_enable_strreset(struct sock *sk, int len,
7544 char __user *optval,
7547 struct sctp_assoc_value params;
7548 struct sctp_association *asoc;
7549 int retval = -EFAULT;
7551 if (len < sizeof(params)) {
7556 len = sizeof(params);
7557 if (copy_from_user(¶ms, optval, len))
7560 asoc = sctp_id2assoc(sk, params.assoc_id);
7561 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7562 sctp_style(sk, UDP)) {
7567 params.assoc_value = asoc ? asoc->strreset_enable
7568 : sctp_sk(sk)->ep->strreset_enable;
7570 if (put_user(len, optlen))
7573 if (copy_to_user(optval, ¶ms, len))
7582 static int sctp_getsockopt_scheduler(struct sock *sk, int len,
7583 char __user *optval,
7586 struct sctp_assoc_value params;
7587 struct sctp_association *asoc;
7588 int retval = -EFAULT;
7590 if (len < sizeof(params)) {
7595 len = sizeof(params);
7596 if (copy_from_user(¶ms, optval, len))
7599 asoc = sctp_id2assoc(sk, params.assoc_id);
7600 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7601 sctp_style(sk, UDP)) {
7606 params.assoc_value = asoc ? sctp_sched_get_sched(asoc)
7607 : sctp_sk(sk)->default_ss;
7609 if (put_user(len, optlen))
7612 if (copy_to_user(optval, ¶ms, len))
7621 static int sctp_getsockopt_scheduler_value(struct sock *sk, int len,
7622 char __user *optval,
7625 struct sctp_stream_value params;
7626 struct sctp_association *asoc;
7627 int retval = -EFAULT;
7629 if (len < sizeof(params)) {
7634 len = sizeof(params);
7635 if (copy_from_user(¶ms, optval, len))
7638 asoc = sctp_id2assoc(sk, params.assoc_id);
7644 retval = sctp_sched_get_value(asoc, params.stream_id,
7645 ¶ms.stream_value);
7649 if (put_user(len, optlen)) {
7654 if (copy_to_user(optval, ¶ms, len)) {
7663 static int sctp_getsockopt_interleaving_supported(struct sock *sk, int len,
7664 char __user *optval,
7667 struct sctp_assoc_value params;
7668 struct sctp_association *asoc;
7669 int retval = -EFAULT;
7671 if (len < sizeof(params)) {
7676 len = sizeof(params);
7677 if (copy_from_user(¶ms, optval, len))
7680 asoc = sctp_id2assoc(sk, params.assoc_id);
7681 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7682 sctp_style(sk, UDP)) {
7687 params.assoc_value = asoc ? asoc->peer.intl_capable
7688 : sctp_sk(sk)->ep->intl_enable;
7690 if (put_user(len, optlen))
7693 if (copy_to_user(optval, ¶ms, len))
7702 static int sctp_getsockopt_reuse_port(struct sock *sk, int len,
7703 char __user *optval,
7708 if (len < sizeof(int))
7712 val = sctp_sk(sk)->reuse;
7713 if (put_user(len, optlen))
7716 if (copy_to_user(optval, &val, len))
7722 static int sctp_getsockopt_event(struct sock *sk, int len, char __user *optval,
7725 struct sctp_association *asoc;
7726 struct sctp_event param;
7729 if (len < sizeof(param))
7732 len = sizeof(param);
7733 if (copy_from_user(¶m, optval, len))
7736 if (param.se_type < SCTP_SN_TYPE_BASE ||
7737 param.se_type > SCTP_SN_TYPE_MAX)
7740 asoc = sctp_id2assoc(sk, param.se_assoc_id);
7741 if (!asoc && param.se_assoc_id != SCTP_FUTURE_ASSOC &&
7742 sctp_style(sk, UDP))
7745 subscribe = asoc ? asoc->subscribe : sctp_sk(sk)->subscribe;
7746 param.se_on = sctp_ulpevent_type_enabled(subscribe, param.se_type);
7748 if (put_user(len, optlen))
7751 if (copy_to_user(optval, ¶m, len))
7757 static int sctp_getsockopt_asconf_supported(struct sock *sk, int len,
7758 char __user *optval,
7761 struct sctp_assoc_value params;
7762 struct sctp_association *asoc;
7763 int retval = -EFAULT;
7765 if (len < sizeof(params)) {
7770 len = sizeof(params);
7771 if (copy_from_user(¶ms, optval, len))
7774 asoc = sctp_id2assoc(sk, params.assoc_id);
7775 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7776 sctp_style(sk, UDP)) {
7781 params.assoc_value = asoc ? asoc->peer.asconf_capable
7782 : sctp_sk(sk)->ep->asconf_enable;
7784 if (put_user(len, optlen))
7787 if (copy_to_user(optval, ¶ms, len))
7796 static int sctp_getsockopt_auth_supported(struct sock *sk, int len,
7797 char __user *optval,
7800 struct sctp_assoc_value params;
7801 struct sctp_association *asoc;
7802 int retval = -EFAULT;
7804 if (len < sizeof(params)) {
7809 len = sizeof(params);
7810 if (copy_from_user(¶ms, optval, len))
7813 asoc = sctp_id2assoc(sk, params.assoc_id);
7814 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7815 sctp_style(sk, UDP)) {
7820 params.assoc_value = asoc ? asoc->peer.auth_capable
7821 : sctp_sk(sk)->ep->auth_enable;
7823 if (put_user(len, optlen))
7826 if (copy_to_user(optval, ¶ms, len))
7835 static int sctp_getsockopt_ecn_supported(struct sock *sk, int len,
7836 char __user *optval,
7839 struct sctp_assoc_value params;
7840 struct sctp_association *asoc;
7841 int retval = -EFAULT;
7843 if (len < sizeof(params)) {
7848 len = sizeof(params);
7849 if (copy_from_user(¶ms, optval, len))
7852 asoc = sctp_id2assoc(sk, params.assoc_id);
7853 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7854 sctp_style(sk, UDP)) {
7859 params.assoc_value = asoc ? asoc->peer.ecn_capable
7860 : sctp_sk(sk)->ep->ecn_enable;
7862 if (put_user(len, optlen))
7865 if (copy_to_user(optval, ¶ms, len))
7874 static int sctp_getsockopt_pf_expose(struct sock *sk, int len,
7875 char __user *optval,
7878 struct sctp_assoc_value params;
7879 struct sctp_association *asoc;
7880 int retval = -EFAULT;
7882 if (len < sizeof(params)) {
7887 len = sizeof(params);
7888 if (copy_from_user(¶ms, optval, len))
7891 asoc = sctp_id2assoc(sk, params.assoc_id);
7892 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7893 sctp_style(sk, UDP)) {
7898 params.assoc_value = asoc ? asoc->pf_expose
7899 : sctp_sk(sk)->pf_expose;
7901 if (put_user(len, optlen))
7904 if (copy_to_user(optval, ¶ms, len))
7913 static int sctp_getsockopt_encap_port(struct sock *sk, int len,
7914 char __user *optval, int __user *optlen)
7916 struct sctp_association *asoc;
7917 struct sctp_udpencaps encap;
7918 struct sctp_transport *t;
7921 if (len < sizeof(encap))
7924 len = sizeof(encap);
7925 if (copy_from_user(&encap, optval, len))
7928 /* If an address other than INADDR_ANY is specified, and
7929 * no transport is found, then the request is invalid.
7931 if (!sctp_is_any(sk, (union sctp_addr *)&encap.sue_address)) {
7932 t = sctp_addr_id2transport(sk, &encap.sue_address,
7933 encap.sue_assoc_id);
7935 pr_debug("%s: failed no transport\n", __func__);
7939 encap_port = t->encap_port;
7943 /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
7944 * socket is a one to many style socket, and an association
7945 * was not found, then the id was invalid.
7947 asoc = sctp_id2assoc(sk, encap.sue_assoc_id);
7948 if (!asoc && encap.sue_assoc_id != SCTP_FUTURE_ASSOC &&
7949 sctp_style(sk, UDP)) {
7950 pr_debug("%s: failed no association\n", __func__);
7955 encap_port = asoc->encap_port;
7959 encap_port = sctp_sk(sk)->encap_port;
7962 encap.sue_port = (__force uint16_t)encap_port;
7963 if (copy_to_user(optval, &encap, len))
7966 if (put_user(len, optlen))
7972 static int sctp_getsockopt_probe_interval(struct sock *sk, int len,
7973 char __user *optval,
7976 struct sctp_probeinterval params;
7977 struct sctp_association *asoc;
7978 struct sctp_transport *t;
7979 __u32 probe_interval;
7981 if (len < sizeof(params))
7984 len = sizeof(params);
7985 if (copy_from_user(¶ms, optval, len))
7988 /* If an address other than INADDR_ANY is specified, and
7989 * no transport is found, then the request is invalid.
7991 if (!sctp_is_any(sk, (union sctp_addr *)¶ms.spi_address)) {
7992 t = sctp_addr_id2transport(sk, ¶ms.spi_address,
7993 params.spi_assoc_id);
7995 pr_debug("%s: failed no transport\n", __func__);
7999 probe_interval = jiffies_to_msecs(t->probe_interval);
8003 /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
8004 * socket is a one to many style socket, and an association
8005 * was not found, then the id was invalid.
8007 asoc = sctp_id2assoc(sk, params.spi_assoc_id);
8008 if (!asoc && params.spi_assoc_id != SCTP_FUTURE_ASSOC &&
8009 sctp_style(sk, UDP)) {
8010 pr_debug("%s: failed no association\n", __func__);
8015 probe_interval = jiffies_to_msecs(asoc->probe_interval);
8019 probe_interval = sctp_sk(sk)->probe_interval;
8022 params.spi_interval = probe_interval;
8023 if (copy_to_user(optval, ¶ms, len))
8026 if (put_user(len, optlen))
8032 static int sctp_getsockopt(struct sock *sk, int level, int optname,
8033 char __user *optval, int __user *optlen)
8038 pr_debug("%s: sk:%p, optname:%d\n", __func__, sk, optname);
8040 /* I can hardly begin to describe how wrong this is. This is
8041 * so broken as to be worse than useless. The API draft
8042 * REALLY is NOT helpful here... I am not convinced that the
8043 * semantics of getsockopt() with a level OTHER THAN SOL_SCTP
8044 * are at all well-founded.
8046 if (level != SOL_SCTP) {
8047 struct sctp_af *af = sctp_sk(sk)->pf->af;
8049 retval = af->getsockopt(sk, level, optname, optval, optlen);
8053 if (get_user(len, optlen))
8063 retval = sctp_getsockopt_sctp_status(sk, len, optval, optlen);
8065 case SCTP_DISABLE_FRAGMENTS:
8066 retval = sctp_getsockopt_disable_fragments(sk, len, optval,
8070 retval = sctp_getsockopt_events(sk, len, optval, optlen);
8072 case SCTP_AUTOCLOSE:
8073 retval = sctp_getsockopt_autoclose(sk, len, optval, optlen);
8075 case SCTP_SOCKOPT_PEELOFF:
8076 retval = sctp_getsockopt_peeloff(sk, len, optval, optlen);
8078 case SCTP_SOCKOPT_PEELOFF_FLAGS:
8079 retval = sctp_getsockopt_peeloff_flags(sk, len, optval, optlen);
8081 case SCTP_PEER_ADDR_PARAMS:
8082 retval = sctp_getsockopt_peer_addr_params(sk, len, optval,
8085 case SCTP_DELAYED_SACK:
8086 retval = sctp_getsockopt_delayed_ack(sk, len, optval,
8090 retval = sctp_getsockopt_initmsg(sk, len, optval, optlen);
8092 case SCTP_GET_PEER_ADDRS:
8093 retval = sctp_getsockopt_peer_addrs(sk, len, optval,
8096 case SCTP_GET_LOCAL_ADDRS:
8097 retval = sctp_getsockopt_local_addrs(sk, len, optval,
8100 case SCTP_SOCKOPT_CONNECTX3:
8101 retval = sctp_getsockopt_connectx3(sk, len, optval, optlen);
8103 case SCTP_DEFAULT_SEND_PARAM:
8104 retval = sctp_getsockopt_default_send_param(sk, len,
8107 case SCTP_DEFAULT_SNDINFO:
8108 retval = sctp_getsockopt_default_sndinfo(sk, len,
8111 case SCTP_PRIMARY_ADDR:
8112 retval = sctp_getsockopt_primary_addr(sk, len, optval, optlen);
8115 retval = sctp_getsockopt_nodelay(sk, len, optval, optlen);
8118 retval = sctp_getsockopt_rtoinfo(sk, len, optval, optlen);
8120 case SCTP_ASSOCINFO:
8121 retval = sctp_getsockopt_associnfo(sk, len, optval, optlen);
8123 case SCTP_I_WANT_MAPPED_V4_ADDR:
8124 retval = sctp_getsockopt_mappedv4(sk, len, optval, optlen);
8127 retval = sctp_getsockopt_maxseg(sk, len, optval, optlen);
8129 case SCTP_GET_PEER_ADDR_INFO:
8130 retval = sctp_getsockopt_peer_addr_info(sk, len, optval,
8133 case SCTP_ADAPTATION_LAYER:
8134 retval = sctp_getsockopt_adaptation_layer(sk, len, optval,
8138 retval = sctp_getsockopt_context(sk, len, optval, optlen);
8140 case SCTP_FRAGMENT_INTERLEAVE:
8141 retval = sctp_getsockopt_fragment_interleave(sk, len, optval,
8144 case SCTP_PARTIAL_DELIVERY_POINT:
8145 retval = sctp_getsockopt_partial_delivery_point(sk, len, optval,
8148 case SCTP_MAX_BURST:
8149 retval = sctp_getsockopt_maxburst(sk, len, optval, optlen);
8152 case SCTP_AUTH_CHUNK:
8153 case SCTP_AUTH_DELETE_KEY:
8154 case SCTP_AUTH_DEACTIVATE_KEY:
8155 retval = -EOPNOTSUPP;
8157 case SCTP_HMAC_IDENT:
8158 retval = sctp_getsockopt_hmac_ident(sk, len, optval, optlen);
8160 case SCTP_AUTH_ACTIVE_KEY:
8161 retval = sctp_getsockopt_active_key(sk, len, optval, optlen);
8163 case SCTP_PEER_AUTH_CHUNKS:
8164 retval = sctp_getsockopt_peer_auth_chunks(sk, len, optval,
8167 case SCTP_LOCAL_AUTH_CHUNKS:
8168 retval = sctp_getsockopt_local_auth_chunks(sk, len, optval,
8171 case SCTP_GET_ASSOC_NUMBER:
8172 retval = sctp_getsockopt_assoc_number(sk, len, optval, optlen);
8174 case SCTP_GET_ASSOC_ID_LIST:
8175 retval = sctp_getsockopt_assoc_ids(sk, len, optval, optlen);
8177 case SCTP_AUTO_ASCONF:
8178 retval = sctp_getsockopt_auto_asconf(sk, len, optval, optlen);
8180 case SCTP_PEER_ADDR_THLDS:
8181 retval = sctp_getsockopt_paddr_thresholds(sk, optval, len,
8184 case SCTP_PEER_ADDR_THLDS_V2:
8185 retval = sctp_getsockopt_paddr_thresholds(sk, optval, len,
8188 case SCTP_GET_ASSOC_STATS:
8189 retval = sctp_getsockopt_assoc_stats(sk, len, optval, optlen);
8191 case SCTP_RECVRCVINFO:
8192 retval = sctp_getsockopt_recvrcvinfo(sk, len, optval, optlen);
8194 case SCTP_RECVNXTINFO:
8195 retval = sctp_getsockopt_recvnxtinfo(sk, len, optval, optlen);
8197 case SCTP_PR_SUPPORTED:
8198 retval = sctp_getsockopt_pr_supported(sk, len, optval, optlen);
8200 case SCTP_DEFAULT_PRINFO:
8201 retval = sctp_getsockopt_default_prinfo(sk, len, optval,
8204 case SCTP_PR_ASSOC_STATUS:
8205 retval = sctp_getsockopt_pr_assocstatus(sk, len, optval,
8208 case SCTP_PR_STREAM_STATUS:
8209 retval = sctp_getsockopt_pr_streamstatus(sk, len, optval,
8212 case SCTP_RECONFIG_SUPPORTED:
8213 retval = sctp_getsockopt_reconfig_supported(sk, len, optval,
8216 case SCTP_ENABLE_STREAM_RESET:
8217 retval = sctp_getsockopt_enable_strreset(sk, len, optval,
8220 case SCTP_STREAM_SCHEDULER:
8221 retval = sctp_getsockopt_scheduler(sk, len, optval,
8224 case SCTP_STREAM_SCHEDULER_VALUE:
8225 retval = sctp_getsockopt_scheduler_value(sk, len, optval,
8228 case SCTP_INTERLEAVING_SUPPORTED:
8229 retval = sctp_getsockopt_interleaving_supported(sk, len, optval,
8232 case SCTP_REUSE_PORT:
8233 retval = sctp_getsockopt_reuse_port(sk, len, optval, optlen);
8236 retval = sctp_getsockopt_event(sk, len, optval, optlen);
8238 case SCTP_ASCONF_SUPPORTED:
8239 retval = sctp_getsockopt_asconf_supported(sk, len, optval,
8242 case SCTP_AUTH_SUPPORTED:
8243 retval = sctp_getsockopt_auth_supported(sk, len, optval,
8246 case SCTP_ECN_SUPPORTED:
8247 retval = sctp_getsockopt_ecn_supported(sk, len, optval, optlen);
8249 case SCTP_EXPOSE_POTENTIALLY_FAILED_STATE:
8250 retval = sctp_getsockopt_pf_expose(sk, len, optval, optlen);
8252 case SCTP_REMOTE_UDP_ENCAPS_PORT:
8253 retval = sctp_getsockopt_encap_port(sk, len, optval, optlen);
8255 case SCTP_PLPMTUD_PROBE_INTERVAL:
8256 retval = sctp_getsockopt_probe_interval(sk, len, optval, optlen);
8259 retval = -ENOPROTOOPT;
8267 static int sctp_hash(struct sock *sk)
8273 static void sctp_unhash(struct sock *sk)
8278 /* Check if port is acceptable. Possibly find first available port.
8280 * The port hash table (contained in the 'global' SCTP protocol storage
8281 * returned by struct sctp_protocol *sctp_get_protocol()). The hash
8282 * table is an array of 4096 lists (sctp_bind_hashbucket). Each
8283 * list (the list number is the port number hashed out, so as you
8284 * would expect from a hash function, all the ports in a given list have
8285 * such a number that hashes out to the same list number; you were
8286 * expecting that, right?); so each list has a set of ports, with a
8287 * link to the socket (struct sock) that uses it, the port number and
8288 * a fastreuse flag (FIXME: NPI ipg).
8290 static struct sctp_bind_bucket *sctp_bucket_create(
8291 struct sctp_bind_hashbucket *head, struct net *, unsigned short snum);
8293 static int sctp_get_port_local(struct sock *sk, union sctp_addr *addr)
8295 struct sctp_sock *sp = sctp_sk(sk);
8296 bool reuse = (sk->sk_reuse || sp->reuse);
8297 struct sctp_bind_hashbucket *head; /* hash list */
8298 struct net *net = sock_net(sk);
8299 kuid_t uid = sock_i_uid(sk);
8300 struct sctp_bind_bucket *pp;
8301 unsigned short snum;
8304 snum = ntohs(addr->v4.sin_port);
8306 pr_debug("%s: begins, snum:%d\n", __func__, snum);
8309 /* Search for an available port. */
8310 int low, high, remaining, index;
8313 inet_get_local_port_range(net, &low, &high);
8314 remaining = (high - low) + 1;
8315 rover = prandom_u32() % remaining + low;
8319 if ((rover < low) || (rover > high))
8321 if (inet_is_local_reserved_port(net, rover))
8323 index = sctp_phashfn(net, rover);
8324 head = &sctp_port_hashtable[index];
8325 spin_lock_bh(&head->lock);
8326 sctp_for_each_hentry(pp, &head->chain)
8327 if ((pp->port == rover) &&
8328 net_eq(net, pp->net))
8332 spin_unlock_bh(&head->lock);
8334 } while (--remaining > 0);
8336 /* Exhausted local port range during search? */
8341 /* OK, here is the one we will use. HEAD (the port
8342 * hash table list entry) is non-NULL and we hold it's
8347 /* We are given an specific port number; we verify
8348 * that it is not being used. If it is used, we will
8349 * exahust the search in the hash list corresponding
8350 * to the port number (snum) - we detect that with the
8351 * port iterator, pp being NULL.
8353 head = &sctp_port_hashtable[sctp_phashfn(net, snum)];
8354 spin_lock_bh(&head->lock);
8355 sctp_for_each_hentry(pp, &head->chain) {
8356 if ((pp->port == snum) && net_eq(pp->net, net))
8363 if (!hlist_empty(&pp->owner)) {
8364 /* We had a port hash table hit - there is an
8365 * available port (pp != NULL) and it is being
8366 * used by other socket (pp->owner not empty); that other
8367 * socket is going to be sk2.
8371 pr_debug("%s: found a possible match\n", __func__);
8373 if ((pp->fastreuse && reuse &&
8374 sk->sk_state != SCTP_SS_LISTENING) ||
8375 (pp->fastreuseport && sk->sk_reuseport &&
8376 uid_eq(pp->fastuid, uid)))
8379 /* Run through the list of sockets bound to the port
8380 * (pp->port) [via the pointers bind_next and
8381 * bind_pprev in the struct sock *sk2 (pp->sk)]. On each one,
8382 * we get the endpoint they describe and run through
8383 * the endpoint's list of IP (v4 or v6) addresses,
8384 * comparing each of the addresses with the address of
8385 * the socket sk. If we find a match, then that means
8386 * that this port/socket (sk) combination are already
8389 sk_for_each_bound(sk2, &pp->owner) {
8390 struct sctp_sock *sp2 = sctp_sk(sk2);
8391 struct sctp_endpoint *ep2 = sp2->ep;
8394 (reuse && (sk2->sk_reuse || sp2->reuse) &&
8395 sk2->sk_state != SCTP_SS_LISTENING) ||
8396 (sk->sk_reuseport && sk2->sk_reuseport &&
8397 uid_eq(uid, sock_i_uid(sk2))))
8400 if (sctp_bind_addr_conflict(&ep2->base.bind_addr,
8407 pr_debug("%s: found a match\n", __func__);
8410 /* If there was a hash table miss, create a new port. */
8412 if (!pp && !(pp = sctp_bucket_create(head, net, snum)))
8415 /* In either case (hit or miss), make sure fastreuse is 1 only
8416 * if sk->sk_reuse is too (that is, if the caller requested
8417 * SO_REUSEADDR on this socket -sk-).
8419 if (hlist_empty(&pp->owner)) {
8420 if (reuse && sk->sk_state != SCTP_SS_LISTENING)
8425 if (sk->sk_reuseport) {
8426 pp->fastreuseport = 1;
8429 pp->fastreuseport = 0;
8432 if (pp->fastreuse &&
8433 (!reuse || sk->sk_state == SCTP_SS_LISTENING))
8436 if (pp->fastreuseport &&
8437 (!sk->sk_reuseport || !uid_eq(pp->fastuid, uid)))
8438 pp->fastreuseport = 0;
8441 /* We are set, so fill up all the data in the hash table
8442 * entry, tie the socket list information with the rest of the
8443 * sockets FIXME: Blurry, NPI (ipg).
8446 if (!sp->bind_hash) {
8447 inet_sk(sk)->inet_num = snum;
8448 sk_add_bind_node(sk, &pp->owner);
8454 spin_unlock_bh(&head->lock);
8458 /* Assign a 'snum' port to the socket. If snum == 0, an ephemeral
8459 * port is requested.
8461 static int sctp_get_port(struct sock *sk, unsigned short snum)
8463 union sctp_addr addr;
8464 struct sctp_af *af = sctp_sk(sk)->pf->af;
8466 /* Set up a dummy address struct from the sk. */
8467 af->from_sk(&addr, sk);
8468 addr.v4.sin_port = htons(snum);
8470 /* Note: sk->sk_num gets filled in if ephemeral port request. */
8471 return sctp_get_port_local(sk, &addr);
8475 * Move a socket to LISTENING state.
8477 static int sctp_listen_start(struct sock *sk, int backlog)
8479 struct sctp_sock *sp = sctp_sk(sk);
8480 struct sctp_endpoint *ep = sp->ep;
8481 struct crypto_shash *tfm = NULL;
8484 /* Allocate HMAC for generating cookie. */
8485 if (!sp->hmac && sp->sctp_hmac_alg) {
8486 sprintf(alg, "hmac(%s)", sp->sctp_hmac_alg);
8487 tfm = crypto_alloc_shash(alg, 0, 0);
8489 net_info_ratelimited("failed to load transform for %s: %ld\n",
8490 sp->sctp_hmac_alg, PTR_ERR(tfm));
8493 sctp_sk(sk)->hmac = tfm;
8497 * If a bind() or sctp_bindx() is not called prior to a listen()
8498 * call that allows new associations to be accepted, the system
8499 * picks an ephemeral port and will choose an address set equivalent
8500 * to binding with a wildcard address.
8502 * This is not currently spelled out in the SCTP sockets
8503 * extensions draft, but follows the practice as seen in TCP
8507 inet_sk_set_state(sk, SCTP_SS_LISTENING);
8508 if (!ep->base.bind_addr.port) {
8509 if (sctp_autobind(sk))
8512 if (sctp_get_port(sk, inet_sk(sk)->inet_num)) {
8513 inet_sk_set_state(sk, SCTP_SS_CLOSED);
8518 WRITE_ONCE(sk->sk_max_ack_backlog, backlog);
8519 return sctp_hash_endpoint(ep);
8523 * 4.1.3 / 5.1.3 listen()
8525 * By default, new associations are not accepted for UDP style sockets.
8526 * An application uses listen() to mark a socket as being able to
8527 * accept new associations.
8529 * On TCP style sockets, applications use listen() to ready the SCTP
8530 * endpoint for accepting inbound associations.
8532 * On both types of endpoints a backlog of '0' disables listening.
8534 * Move a socket to LISTENING state.
8536 int sctp_inet_listen(struct socket *sock, int backlog)
8538 struct sock *sk = sock->sk;
8539 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
8542 if (unlikely(backlog < 0))
8547 /* Peeled-off sockets are not allowed to listen(). */
8548 if (sctp_style(sk, UDP_HIGH_BANDWIDTH))
8551 if (sock->state != SS_UNCONNECTED)
8554 if (!sctp_sstate(sk, LISTENING) && !sctp_sstate(sk, CLOSED))
8557 /* If backlog is zero, disable listening. */
8559 if (sctp_sstate(sk, CLOSED))
8563 sctp_unhash_endpoint(ep);
8564 sk->sk_state = SCTP_SS_CLOSED;
8565 if (sk->sk_reuse || sctp_sk(sk)->reuse)
8566 sctp_sk(sk)->bind_hash->fastreuse = 1;
8570 /* If we are already listening, just update the backlog */
8571 if (sctp_sstate(sk, LISTENING))
8572 WRITE_ONCE(sk->sk_max_ack_backlog, backlog);
8574 err = sctp_listen_start(sk, backlog);
8586 * This function is done by modeling the current datagram_poll() and the
8587 * tcp_poll(). Note that, based on these implementations, we don't
8588 * lock the socket in this function, even though it seems that,
8589 * ideally, locking or some other mechanisms can be used to ensure
8590 * the integrity of the counters (sndbuf and wmem_alloc) used
8591 * in this place. We assume that we don't need locks either until proven
8594 * Another thing to note is that we include the Async I/O support
8595 * here, again, by modeling the current TCP/UDP code. We don't have
8596 * a good way to test with it yet.
8598 __poll_t sctp_poll(struct file *file, struct socket *sock, poll_table *wait)
8600 struct sock *sk = sock->sk;
8601 struct sctp_sock *sp = sctp_sk(sk);
8604 poll_wait(file, sk_sleep(sk), wait);
8606 sock_rps_record_flow(sk);
8608 /* A TCP-style listening socket becomes readable when the accept queue
8611 if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))
8612 return (!list_empty(&sp->ep->asocs)) ?
8613 (EPOLLIN | EPOLLRDNORM) : 0;
8617 /* Is there any exceptional events? */
8618 if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue))
8620 (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? EPOLLPRI : 0);
8621 if (sk->sk_shutdown & RCV_SHUTDOWN)
8622 mask |= EPOLLRDHUP | EPOLLIN | EPOLLRDNORM;
8623 if (sk->sk_shutdown == SHUTDOWN_MASK)
8626 /* Is it readable? Reconsider this code with TCP-style support. */
8627 if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
8628 mask |= EPOLLIN | EPOLLRDNORM;
8630 /* The association is either gone or not ready. */
8631 if (!sctp_style(sk, UDP) && sctp_sstate(sk, CLOSED))
8634 /* Is it writable? */
8635 if (sctp_writeable(sk)) {
8636 mask |= EPOLLOUT | EPOLLWRNORM;
8638 sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk);
8640 * Since the socket is not locked, the buffer
8641 * might be made available after the writeable check and
8642 * before the bit is set. This could cause a lost I/O
8643 * signal. tcp_poll() has a race breaker for this race
8644 * condition. Based on their implementation, we put
8645 * in the following code to cover it as well.
8647 if (sctp_writeable(sk))
8648 mask |= EPOLLOUT | EPOLLWRNORM;
8653 /********************************************************************
8654 * 2nd Level Abstractions
8655 ********************************************************************/
8657 static struct sctp_bind_bucket *sctp_bucket_create(
8658 struct sctp_bind_hashbucket *head, struct net *net, unsigned short snum)
8660 struct sctp_bind_bucket *pp;
8662 pp = kmem_cache_alloc(sctp_bucket_cachep, GFP_ATOMIC);
8664 SCTP_DBG_OBJCNT_INC(bind_bucket);
8667 INIT_HLIST_HEAD(&pp->owner);
8669 hlist_add_head(&pp->node, &head->chain);
8674 /* Caller must hold hashbucket lock for this tb with local BH disabled */
8675 static void sctp_bucket_destroy(struct sctp_bind_bucket *pp)
8677 if (pp && hlist_empty(&pp->owner)) {
8678 __hlist_del(&pp->node);
8679 kmem_cache_free(sctp_bucket_cachep, pp);
8680 SCTP_DBG_OBJCNT_DEC(bind_bucket);
8684 /* Release this socket's reference to a local port. */
8685 static inline void __sctp_put_port(struct sock *sk)
8687 struct sctp_bind_hashbucket *head =
8688 &sctp_port_hashtable[sctp_phashfn(sock_net(sk),
8689 inet_sk(sk)->inet_num)];
8690 struct sctp_bind_bucket *pp;
8692 spin_lock(&head->lock);
8693 pp = sctp_sk(sk)->bind_hash;
8694 __sk_del_bind_node(sk);
8695 sctp_sk(sk)->bind_hash = NULL;
8696 inet_sk(sk)->inet_num = 0;
8697 sctp_bucket_destroy(pp);
8698 spin_unlock(&head->lock);
8701 void sctp_put_port(struct sock *sk)
8704 __sctp_put_port(sk);
8709 * The system picks an ephemeral port and choose an address set equivalent
8710 * to binding with a wildcard address.
8711 * One of those addresses will be the primary address for the association.
8712 * This automatically enables the multihoming capability of SCTP.
8714 static int sctp_autobind(struct sock *sk)
8716 union sctp_addr autoaddr;
8720 /* Initialize a local sockaddr structure to INADDR_ANY. */
8721 af = sctp_sk(sk)->pf->af;
8723 port = htons(inet_sk(sk)->inet_num);
8724 af->inaddr_any(&autoaddr, port);
8726 return sctp_do_bind(sk, &autoaddr, af->sockaddr_len);
8729 /* Parse out IPPROTO_SCTP CMSG headers. Perform only minimal validation.
8732 * 4.2 The cmsghdr Structure *
8734 * When ancillary data is sent or received, any number of ancillary data
8735 * objects can be specified by the msg_control and msg_controllen members of
8736 * the msghdr structure, because each object is preceded by
8737 * a cmsghdr structure defining the object's length (the cmsg_len member).
8738 * Historically Berkeley-derived implementations have passed only one object
8739 * at a time, but this API allows multiple objects to be
8740 * passed in a single call to sendmsg() or recvmsg(). The following example
8741 * shows two ancillary data objects in a control buffer.
8743 * |<--------------------------- msg_controllen -------------------------->|
8746 * |<----- ancillary data object ----->|<----- ancillary data object ----->|
8748 * |<---------- CMSG_SPACE() --------->|<---------- CMSG_SPACE() --------->|
8751 * |<---------- cmsg_len ---------->| |<--------- cmsg_len ----------->| |
8753 * |<--------- CMSG_LEN() --------->| |<-------- CMSG_LEN() ---------->| |
8756 * +-----+-----+-----+--+-----------+--+-----+-----+-----+--+-----------+--+
8757 * |cmsg_|cmsg_|cmsg_|XX| |XX|cmsg_|cmsg_|cmsg_|XX| |XX|
8759 * |len |level|type |XX|cmsg_data[]|XX|len |level|type |XX|cmsg_data[]|XX|
8761 * +-----+-----+-----+--+-----------+--+-----+-----+-----+--+-----------+--+
8768 static int sctp_msghdr_parse(const struct msghdr *msg, struct sctp_cmsgs *cmsgs)
8770 struct msghdr *my_msg = (struct msghdr *)msg;
8771 struct cmsghdr *cmsg;
8773 for_each_cmsghdr(cmsg, my_msg) {
8774 if (!CMSG_OK(my_msg, cmsg))
8777 /* Should we parse this header or ignore? */
8778 if (cmsg->cmsg_level != IPPROTO_SCTP)
8781 /* Strictly check lengths following example in SCM code. */
8782 switch (cmsg->cmsg_type) {
8784 /* SCTP Socket API Extension
8785 * 5.3.1 SCTP Initiation Structure (SCTP_INIT)
8787 * This cmsghdr structure provides information for
8788 * initializing new SCTP associations with sendmsg().
8789 * The SCTP_INITMSG socket option uses this same data
8790 * structure. This structure is not used for
8793 * cmsg_level cmsg_type cmsg_data[]
8794 * ------------ ------------ ----------------------
8795 * IPPROTO_SCTP SCTP_INIT struct sctp_initmsg
8797 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_initmsg)))
8800 cmsgs->init = CMSG_DATA(cmsg);
8804 /* SCTP Socket API Extension
8805 * 5.3.2 SCTP Header Information Structure(SCTP_SNDRCV)
8807 * This cmsghdr structure specifies SCTP options for
8808 * sendmsg() and describes SCTP header information
8809 * about a received message through recvmsg().
8811 * cmsg_level cmsg_type cmsg_data[]
8812 * ------------ ------------ ----------------------
8813 * IPPROTO_SCTP SCTP_SNDRCV struct sctp_sndrcvinfo
8815 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_sndrcvinfo)))
8818 cmsgs->srinfo = CMSG_DATA(cmsg);
8820 if (cmsgs->srinfo->sinfo_flags &
8821 ~(SCTP_UNORDERED | SCTP_ADDR_OVER |
8822 SCTP_SACK_IMMEDIATELY | SCTP_SENDALL |
8823 SCTP_PR_SCTP_MASK | SCTP_ABORT | SCTP_EOF))
8828 /* SCTP Socket API Extension
8829 * 5.3.4 SCTP Send Information Structure (SCTP_SNDINFO)
8831 * This cmsghdr structure specifies SCTP options for
8832 * sendmsg(). This structure and SCTP_RCVINFO replaces
8833 * SCTP_SNDRCV which has been deprecated.
8835 * cmsg_level cmsg_type cmsg_data[]
8836 * ------------ ------------ ---------------------
8837 * IPPROTO_SCTP SCTP_SNDINFO struct sctp_sndinfo
8839 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_sndinfo)))
8842 cmsgs->sinfo = CMSG_DATA(cmsg);
8844 if (cmsgs->sinfo->snd_flags &
8845 ~(SCTP_UNORDERED | SCTP_ADDR_OVER |
8846 SCTP_SACK_IMMEDIATELY | SCTP_SENDALL |
8847 SCTP_PR_SCTP_MASK | SCTP_ABORT | SCTP_EOF))
8851 /* SCTP Socket API Extension
8852 * 5.3.7 SCTP PR-SCTP Information Structure (SCTP_PRINFO)
8854 * This cmsghdr structure specifies SCTP options for sendmsg().
8856 * cmsg_level cmsg_type cmsg_data[]
8857 * ------------ ------------ ---------------------
8858 * IPPROTO_SCTP SCTP_PRINFO struct sctp_prinfo
8860 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_prinfo)))
8863 cmsgs->prinfo = CMSG_DATA(cmsg);
8864 if (cmsgs->prinfo->pr_policy & ~SCTP_PR_SCTP_MASK)
8867 if (cmsgs->prinfo->pr_policy == SCTP_PR_SCTP_NONE)
8868 cmsgs->prinfo->pr_value = 0;
8871 /* SCTP Socket API Extension
8872 * 5.3.8 SCTP AUTH Information Structure (SCTP_AUTHINFO)
8874 * This cmsghdr structure specifies SCTP options for sendmsg().
8876 * cmsg_level cmsg_type cmsg_data[]
8877 * ------------ ------------ ---------------------
8878 * IPPROTO_SCTP SCTP_AUTHINFO struct sctp_authinfo
8880 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_authinfo)))
8883 cmsgs->authinfo = CMSG_DATA(cmsg);
8885 case SCTP_DSTADDRV4:
8886 case SCTP_DSTADDRV6:
8887 /* SCTP Socket API Extension
8888 * 5.3.9/10 SCTP Destination IPv4/6 Address Structure (SCTP_DSTADDRV4/6)
8890 * This cmsghdr structure specifies SCTP options for sendmsg().
8892 * cmsg_level cmsg_type cmsg_data[]
8893 * ------------ ------------ ---------------------
8894 * IPPROTO_SCTP SCTP_DSTADDRV4 struct in_addr
8895 * ------------ ------------ ---------------------
8896 * IPPROTO_SCTP SCTP_DSTADDRV6 struct in6_addr
8898 cmsgs->addrs_msg = my_msg;
8909 * Wait for a packet..
8910 * Note: This function is the same function as in core/datagram.c
8911 * with a few modifications to make lksctp work.
8913 static int sctp_wait_for_packet(struct sock *sk, int *err, long *timeo_p)
8918 prepare_to_wait_exclusive(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
8920 /* Socket errors? */
8921 error = sock_error(sk);
8925 if (!skb_queue_empty(&sk->sk_receive_queue))
8928 /* Socket shut down? */
8929 if (sk->sk_shutdown & RCV_SHUTDOWN)
8932 /* Sequenced packets can come disconnected. If so we report the
8937 /* Is there a good reason to think that we may receive some data? */
8938 if (list_empty(&sctp_sk(sk)->ep->asocs) && !sctp_sstate(sk, LISTENING))
8941 /* Handle signals. */
8942 if (signal_pending(current))
8945 /* Let another process have a go. Since we are going to sleep
8946 * anyway. Note: This may cause odd behaviors if the message
8947 * does not fit in the user's buffer, but this seems to be the
8948 * only way to honor MSG_DONTWAIT realistically.
8951 *timeo_p = schedule_timeout(*timeo_p);
8955 finish_wait(sk_sleep(sk), &wait);
8959 error = sock_intr_errno(*timeo_p);
8962 finish_wait(sk_sleep(sk), &wait);
8967 /* Receive a datagram.
8968 * Note: This is pretty much the same routine as in core/datagram.c
8969 * with a few changes to make lksctp work.
8971 struct sk_buff *sctp_skb_recv_datagram(struct sock *sk, int flags,
8972 int noblock, int *err)
8975 struct sk_buff *skb;
8978 timeo = sock_rcvtimeo(sk, noblock);
8980 pr_debug("%s: timeo:%ld, max:%ld\n", __func__, timeo,
8981 MAX_SCHEDULE_TIMEOUT);
8984 /* Again only user level code calls this function,
8985 * so nothing interrupt level
8986 * will suddenly eat the receive_queue.
8988 * Look at current nfs client by the way...
8989 * However, this function was correct in any case. 8)
8991 if (flags & MSG_PEEK) {
8992 skb = skb_peek(&sk->sk_receive_queue);
8994 refcount_inc(&skb->users);
8996 skb = __skb_dequeue(&sk->sk_receive_queue);
9002 /* Caller is allowed not to check sk->sk_err before calling. */
9003 error = sock_error(sk);
9007 if (sk->sk_shutdown & RCV_SHUTDOWN)
9010 if (sk_can_busy_loop(sk)) {
9011 sk_busy_loop(sk, noblock);
9013 if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
9017 /* User doesn't want to wait. */
9021 } while (sctp_wait_for_packet(sk, err, &timeo) == 0);
9030 /* If sndbuf has changed, wake up per association sndbuf waiters. */
9031 static void __sctp_write_space(struct sctp_association *asoc)
9033 struct sock *sk = asoc->base.sk;
9035 if (sctp_wspace(asoc) <= 0)
9038 if (waitqueue_active(&asoc->wait))
9039 wake_up_interruptible(&asoc->wait);
9041 if (sctp_writeable(sk)) {
9042 struct socket_wq *wq;
9045 wq = rcu_dereference(sk->sk_wq);
9047 if (waitqueue_active(&wq->wait))
9048 wake_up_interruptible(&wq->wait);
9050 /* Note that we try to include the Async I/O support
9051 * here by modeling from the current TCP/UDP code.
9052 * We have not tested with it yet.
9054 if (!(sk->sk_shutdown & SEND_SHUTDOWN))
9055 sock_wake_async(wq, SOCK_WAKE_SPACE, POLL_OUT);
9061 static void sctp_wake_up_waiters(struct sock *sk,
9062 struct sctp_association *asoc)
9064 struct sctp_association *tmp = asoc;
9066 /* We do accounting for the sndbuf space per association,
9067 * so we only need to wake our own association.
9069 if (asoc->ep->sndbuf_policy)
9070 return __sctp_write_space(asoc);
9072 /* If association goes down and is just flushing its
9073 * outq, then just normally notify others.
9075 if (asoc->base.dead)
9076 return sctp_write_space(sk);
9078 /* Accounting for the sndbuf space is per socket, so we
9079 * need to wake up others, try to be fair and in case of
9080 * other associations, let them have a go first instead
9081 * of just doing a sctp_write_space() call.
9083 * Note that we reach sctp_wake_up_waiters() only when
9084 * associations free up queued chunks, thus we are under
9085 * lock and the list of associations on a socket is
9086 * guaranteed not to change.
9088 for (tmp = list_next_entry(tmp, asocs); 1;
9089 tmp = list_next_entry(tmp, asocs)) {
9090 /* Manually skip the head element. */
9091 if (&tmp->asocs == &((sctp_sk(sk))->ep->asocs))
9093 /* Wake up association. */
9094 __sctp_write_space(tmp);
9095 /* We've reached the end. */
9101 /* Do accounting for the sndbuf space.
9102 * Decrement the used sndbuf space of the corresponding association by the
9103 * data size which was just transmitted(freed).
9105 static void sctp_wfree(struct sk_buff *skb)
9107 struct sctp_chunk *chunk = skb_shinfo(skb)->destructor_arg;
9108 struct sctp_association *asoc = chunk->asoc;
9109 struct sock *sk = asoc->base.sk;
9111 sk_mem_uncharge(sk, skb->truesize);
9112 sk->sk_wmem_queued -= skb->truesize + sizeof(struct sctp_chunk);
9113 asoc->sndbuf_used -= skb->truesize + sizeof(struct sctp_chunk);
9114 WARN_ON(refcount_sub_and_test(sizeof(struct sctp_chunk),
9115 &sk->sk_wmem_alloc));
9118 struct sctp_shared_key *shkey = chunk->shkey;
9120 /* refcnt == 2 and !list_empty mean after this release, it's
9121 * not being used anywhere, and it's time to notify userland
9122 * that this shkey can be freed if it's been deactivated.
9124 if (shkey->deactivated && !list_empty(&shkey->key_list) &&
9125 refcount_read(&shkey->refcnt) == 2) {
9126 struct sctp_ulpevent *ev;
9128 ev = sctp_ulpevent_make_authkey(asoc, shkey->key_id,
9132 asoc->stream.si->enqueue_event(&asoc->ulpq, ev);
9134 sctp_auth_shkey_release(chunk->shkey);
9138 sctp_wake_up_waiters(sk, asoc);
9140 sctp_association_put(asoc);
9143 /* Do accounting for the receive space on the socket.
9144 * Accounting for the association is done in ulpevent.c
9145 * We set this as a destructor for the cloned data skbs so that
9146 * accounting is done at the correct time.
9148 void sctp_sock_rfree(struct sk_buff *skb)
9150 struct sock *sk = skb->sk;
9151 struct sctp_ulpevent *event = sctp_skb2event(skb);
9153 atomic_sub(event->rmem_len, &sk->sk_rmem_alloc);
9156 * Mimic the behavior of sock_rfree
9158 sk_mem_uncharge(sk, event->rmem_len);
9162 /* Helper function to wait for space in the sndbuf. */
9163 static int sctp_wait_for_sndbuf(struct sctp_association *asoc, long *timeo_p,
9166 struct sock *sk = asoc->base.sk;
9167 long current_timeo = *timeo_p;
9171 pr_debug("%s: asoc:%p, timeo:%ld, msg_len:%zu\n", __func__, asoc,
9174 /* Increment the association's refcnt. */
9175 sctp_association_hold(asoc);
9177 /* Wait on the association specific sndbuf space. */
9179 prepare_to_wait_exclusive(&asoc->wait, &wait,
9180 TASK_INTERRUPTIBLE);
9181 if (asoc->base.dead)
9185 if (sk->sk_err || asoc->state >= SCTP_STATE_SHUTDOWN_PENDING)
9187 if (signal_pending(current))
9188 goto do_interrupted;
9189 if (sk_under_memory_pressure(sk))
9191 if ((int)msg_len <= sctp_wspace(asoc) &&
9192 sk_wmem_schedule(sk, msg_len))
9195 /* Let another process have a go. Since we are going
9199 current_timeo = schedule_timeout(current_timeo);
9201 if (sk != asoc->base.sk)
9204 *timeo_p = current_timeo;
9208 finish_wait(&asoc->wait, &wait);
9210 /* Release the association's refcnt. */
9211 sctp_association_put(asoc);
9224 err = sock_intr_errno(*timeo_p);
9232 void sctp_data_ready(struct sock *sk)
9234 struct socket_wq *wq;
9237 wq = rcu_dereference(sk->sk_wq);
9238 if (skwq_has_sleeper(wq))
9239 wake_up_interruptible_sync_poll(&wq->wait, EPOLLIN |
9240 EPOLLRDNORM | EPOLLRDBAND);
9241 sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_IN);
9245 /* If socket sndbuf has changed, wake up all per association waiters. */
9246 void sctp_write_space(struct sock *sk)
9248 struct sctp_association *asoc;
9250 /* Wake up the tasks in each wait queue. */
9251 list_for_each_entry(asoc, &((sctp_sk(sk))->ep->asocs), asocs) {
9252 __sctp_write_space(asoc);
9256 /* Is there any sndbuf space available on the socket?
9258 * Note that sk_wmem_alloc is the sum of the send buffers on all of the
9259 * associations on the same socket. For a UDP-style socket with
9260 * multiple associations, it is possible for it to be "unwriteable"
9261 * prematurely. I assume that this is acceptable because
9262 * a premature "unwriteable" is better than an accidental "writeable" which
9263 * would cause an unwanted block under certain circumstances. For the 1-1
9264 * UDP-style sockets or TCP-style sockets, this code should work.
9267 static bool sctp_writeable(struct sock *sk)
9269 return sk->sk_sndbuf > sk->sk_wmem_queued;
9272 /* Wait for an association to go into ESTABLISHED state. If timeout is 0,
9273 * returns immediately with EINPROGRESS.
9275 static int sctp_wait_for_connect(struct sctp_association *asoc, long *timeo_p)
9277 struct sock *sk = asoc->base.sk;
9279 long current_timeo = *timeo_p;
9282 pr_debug("%s: asoc:%p, timeo:%ld\n", __func__, asoc, *timeo_p);
9284 /* Increment the association's refcnt. */
9285 sctp_association_hold(asoc);
9288 prepare_to_wait_exclusive(&asoc->wait, &wait,
9289 TASK_INTERRUPTIBLE);
9292 if (sk->sk_shutdown & RCV_SHUTDOWN)
9294 if (sk->sk_err || asoc->state >= SCTP_STATE_SHUTDOWN_PENDING ||
9297 if (signal_pending(current))
9298 goto do_interrupted;
9300 if (sctp_state(asoc, ESTABLISHED))
9303 /* Let another process have a go. Since we are going
9307 current_timeo = schedule_timeout(current_timeo);
9310 *timeo_p = current_timeo;
9314 finish_wait(&asoc->wait, &wait);
9316 /* Release the association's refcnt. */
9317 sctp_association_put(asoc);
9322 if (asoc->init_err_counter + 1 > asoc->max_init_attempts)
9325 err = -ECONNREFUSED;
9329 err = sock_intr_errno(*timeo_p);
9337 static int sctp_wait_for_accept(struct sock *sk, long timeo)
9339 struct sctp_endpoint *ep;
9343 ep = sctp_sk(sk)->ep;
9347 prepare_to_wait_exclusive(sk_sleep(sk), &wait,
9348 TASK_INTERRUPTIBLE);
9350 if (list_empty(&ep->asocs)) {
9352 timeo = schedule_timeout(timeo);
9357 if (!sctp_sstate(sk, LISTENING))
9361 if (!list_empty(&ep->asocs))
9364 err = sock_intr_errno(timeo);
9365 if (signal_pending(current))
9373 finish_wait(sk_sleep(sk), &wait);
9378 static void sctp_wait_for_close(struct sock *sk, long timeout)
9383 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
9384 if (list_empty(&sctp_sk(sk)->ep->asocs))
9387 timeout = schedule_timeout(timeout);
9389 } while (!signal_pending(current) && timeout);
9391 finish_wait(sk_sleep(sk), &wait);
9394 static void sctp_skb_set_owner_r_frag(struct sk_buff *skb, struct sock *sk)
9396 struct sk_buff *frag;
9401 /* Don't forget the fragments. */
9402 skb_walk_frags(skb, frag)
9403 sctp_skb_set_owner_r_frag(frag, sk);
9406 sctp_skb_set_owner_r(skb, sk);
9409 void sctp_copy_sock(struct sock *newsk, struct sock *sk,
9410 struct sctp_association *asoc)
9412 struct inet_sock *inet = inet_sk(sk);
9413 struct inet_sock *newinet;
9414 struct sctp_sock *sp = sctp_sk(sk);
9415 struct sctp_endpoint *ep = sp->ep;
9417 newsk->sk_type = sk->sk_type;
9418 newsk->sk_bound_dev_if = sk->sk_bound_dev_if;
9419 newsk->sk_flags = sk->sk_flags;
9420 newsk->sk_tsflags = sk->sk_tsflags;
9421 newsk->sk_no_check_tx = sk->sk_no_check_tx;
9422 newsk->sk_no_check_rx = sk->sk_no_check_rx;
9423 newsk->sk_reuse = sk->sk_reuse;
9424 sctp_sk(newsk)->reuse = sp->reuse;
9426 newsk->sk_shutdown = sk->sk_shutdown;
9427 newsk->sk_destruct = sctp_destruct_sock;
9428 newsk->sk_family = sk->sk_family;
9429 newsk->sk_protocol = IPPROTO_SCTP;
9430 newsk->sk_backlog_rcv = sk->sk_prot->backlog_rcv;
9431 newsk->sk_sndbuf = sk->sk_sndbuf;
9432 newsk->sk_rcvbuf = sk->sk_rcvbuf;
9433 newsk->sk_lingertime = sk->sk_lingertime;
9434 newsk->sk_rcvtimeo = sk->sk_rcvtimeo;
9435 newsk->sk_sndtimeo = sk->sk_sndtimeo;
9436 newsk->sk_rxhash = sk->sk_rxhash;
9438 newinet = inet_sk(newsk);
9440 /* Initialize sk's sport, dport, rcv_saddr and daddr for
9441 * getsockname() and getpeername()
9443 newinet->inet_sport = inet->inet_sport;
9444 newinet->inet_saddr = inet->inet_saddr;
9445 newinet->inet_rcv_saddr = inet->inet_rcv_saddr;
9446 newinet->inet_dport = htons(asoc->peer.port);
9447 newinet->pmtudisc = inet->pmtudisc;
9448 newinet->inet_id = prandom_u32();
9450 newinet->uc_ttl = inet->uc_ttl;
9451 newinet->mc_loop = 1;
9452 newinet->mc_ttl = 1;
9453 newinet->mc_index = 0;
9454 newinet->mc_list = NULL;
9456 if (newsk->sk_flags & SK_FLAGS_TIMESTAMP)
9457 net_enable_timestamp();
9459 /* Set newsk security attributes from original sk and connection
9460 * security attribute from ep.
9462 security_sctp_sk_clone(ep, sk, newsk);
9465 static inline void sctp_copy_descendant(struct sock *sk_to,
9466 const struct sock *sk_from)
9468 size_t ancestor_size = sizeof(struct inet_sock);
9470 ancestor_size += sk_from->sk_prot->obj_size;
9471 ancestor_size -= offsetof(struct sctp_sock, pd_lobby);
9472 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
9475 /* Populate the fields of the newsk from the oldsk and migrate the assoc
9476 * and its messages to the newsk.
9478 static int sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
9479 struct sctp_association *assoc,
9480 enum sctp_socket_type type)
9482 struct sctp_sock *oldsp = sctp_sk(oldsk);
9483 struct sctp_sock *newsp = sctp_sk(newsk);
9484 struct sctp_bind_bucket *pp; /* hash list port iterator */
9485 struct sctp_endpoint *newep = newsp->ep;
9486 struct sk_buff *skb, *tmp;
9487 struct sctp_ulpevent *event;
9488 struct sctp_bind_hashbucket *head;
9491 /* Migrate socket buffer sizes and all the socket level options to the
9494 newsk->sk_sndbuf = oldsk->sk_sndbuf;
9495 newsk->sk_rcvbuf = oldsk->sk_rcvbuf;
9496 /* Brute force copy old sctp opt. */
9497 sctp_copy_descendant(newsk, oldsk);
9499 /* Restore the ep value that was overwritten with the above structure
9505 /* Hook this new socket in to the bind_hash list. */
9506 head = &sctp_port_hashtable[sctp_phashfn(sock_net(oldsk),
9507 inet_sk(oldsk)->inet_num)];
9508 spin_lock_bh(&head->lock);
9509 pp = sctp_sk(oldsk)->bind_hash;
9510 sk_add_bind_node(newsk, &pp->owner);
9511 sctp_sk(newsk)->bind_hash = pp;
9512 inet_sk(newsk)->inet_num = inet_sk(oldsk)->inet_num;
9513 spin_unlock_bh(&head->lock);
9515 /* Copy the bind_addr list from the original endpoint to the new
9516 * endpoint so that we can handle restarts properly
9518 err = sctp_bind_addr_dup(&newsp->ep->base.bind_addr,
9519 &oldsp->ep->base.bind_addr, GFP_KERNEL);
9523 /* New ep's auth_hmacs should be set if old ep's is set, in case
9524 * that net->sctp.auth_enable has been changed to 0 by users and
9525 * new ep's auth_hmacs couldn't be set in sctp_endpoint_init().
9527 if (oldsp->ep->auth_hmacs) {
9528 err = sctp_auth_init_hmacs(newsp->ep, GFP_KERNEL);
9533 sctp_auto_asconf_init(newsp);
9535 /* Move any messages in the old socket's receive queue that are for the
9536 * peeled off association to the new socket's receive queue.
9538 sctp_skb_for_each(skb, &oldsk->sk_receive_queue, tmp) {
9539 event = sctp_skb2event(skb);
9540 if (event->asoc == assoc) {
9541 __skb_unlink(skb, &oldsk->sk_receive_queue);
9542 __skb_queue_tail(&newsk->sk_receive_queue, skb);
9543 sctp_skb_set_owner_r_frag(skb, newsk);
9547 /* Clean up any messages pending delivery due to partial
9548 * delivery. Three cases:
9549 * 1) No partial deliver; no work.
9550 * 2) Peeling off partial delivery; keep pd_lobby in new pd_lobby.
9551 * 3) Peeling off non-partial delivery; move pd_lobby to receive_queue.
9553 atomic_set(&sctp_sk(newsk)->pd_mode, assoc->ulpq.pd_mode);
9555 if (atomic_read(&sctp_sk(oldsk)->pd_mode)) {
9556 struct sk_buff_head *queue;
9558 /* Decide which queue to move pd_lobby skbs to. */
9559 if (assoc->ulpq.pd_mode) {
9560 queue = &newsp->pd_lobby;
9562 queue = &newsk->sk_receive_queue;
9564 /* Walk through the pd_lobby, looking for skbs that
9565 * need moved to the new socket.
9567 sctp_skb_for_each(skb, &oldsp->pd_lobby, tmp) {
9568 event = sctp_skb2event(skb);
9569 if (event->asoc == assoc) {
9570 __skb_unlink(skb, &oldsp->pd_lobby);
9571 __skb_queue_tail(queue, skb);
9572 sctp_skb_set_owner_r_frag(skb, newsk);
9576 /* Clear up any skbs waiting for the partial
9577 * delivery to finish.
9579 if (assoc->ulpq.pd_mode)
9580 sctp_clear_pd(oldsk, NULL);
9584 sctp_for_each_rx_skb(assoc, newsk, sctp_skb_set_owner_r_frag);
9586 /* Set the type of socket to indicate that it is peeled off from the
9587 * original UDP-style socket or created with the accept() call on a
9588 * TCP-style socket..
9592 /* Mark the new socket "in-use" by the user so that any packets
9593 * that may arrive on the association after we've moved it are
9594 * queued to the backlog. This prevents a potential race between
9595 * backlog processing on the old socket and new-packet processing
9596 * on the new socket.
9598 * The caller has just allocated newsk so we can guarantee that other
9599 * paths won't try to lock it and then oldsk.
9601 lock_sock_nested(newsk, SINGLE_DEPTH_NESTING);
9602 sctp_for_each_tx_datachunk(assoc, true, sctp_clear_owner_w);
9603 sctp_assoc_migrate(assoc, newsk);
9604 sctp_for_each_tx_datachunk(assoc, false, sctp_set_owner_w);
9606 /* If the association on the newsk is already closed before accept()
9607 * is called, set RCV_SHUTDOWN flag.
9609 if (sctp_state(assoc, CLOSED) && sctp_style(newsk, TCP)) {
9610 inet_sk_set_state(newsk, SCTP_SS_CLOSED);
9611 newsk->sk_shutdown |= RCV_SHUTDOWN;
9613 inet_sk_set_state(newsk, SCTP_SS_ESTABLISHED);
9616 release_sock(newsk);
9622 /* This proto struct describes the ULP interface for SCTP. */
9623 struct proto sctp_prot = {
9625 .owner = THIS_MODULE,
9626 .close = sctp_close,
9627 .disconnect = sctp_disconnect,
9628 .accept = sctp_accept,
9629 .ioctl = sctp_ioctl,
9630 .init = sctp_init_sock,
9631 .destroy = sctp_destroy_sock,
9632 .shutdown = sctp_shutdown,
9633 .setsockopt = sctp_setsockopt,
9634 .getsockopt = sctp_getsockopt,
9635 .sendmsg = sctp_sendmsg,
9636 .recvmsg = sctp_recvmsg,
9638 .bind_add = sctp_bind_add,
9639 .backlog_rcv = sctp_backlog_rcv,
9641 .unhash = sctp_unhash,
9642 .no_autobind = true,
9643 .obj_size = sizeof(struct sctp_sock),
9644 .useroffset = offsetof(struct sctp_sock, subscribe),
9645 .usersize = offsetof(struct sctp_sock, initmsg) -
9646 offsetof(struct sctp_sock, subscribe) +
9647 sizeof_field(struct sctp_sock, initmsg),
9648 .sysctl_mem = sysctl_sctp_mem,
9649 .sysctl_rmem = sysctl_sctp_rmem,
9650 .sysctl_wmem = sysctl_sctp_wmem,
9651 .memory_pressure = &sctp_memory_pressure,
9652 .enter_memory_pressure = sctp_enter_memory_pressure,
9653 .memory_allocated = &sctp_memory_allocated,
9654 .sockets_allocated = &sctp_sockets_allocated,
9657 #if IS_ENABLED(CONFIG_IPV6)
9659 #include <net/transp_v6.h>
9660 static void sctp_v6_destroy_sock(struct sock *sk)
9662 sctp_destroy_sock(sk);
9663 inet6_destroy_sock(sk);
9666 struct proto sctpv6_prot = {
9668 .owner = THIS_MODULE,
9669 .close = sctp_close,
9670 .disconnect = sctp_disconnect,
9671 .accept = sctp_accept,
9672 .ioctl = sctp_ioctl,
9673 .init = sctp_init_sock,
9674 .destroy = sctp_v6_destroy_sock,
9675 .shutdown = sctp_shutdown,
9676 .setsockopt = sctp_setsockopt,
9677 .getsockopt = sctp_getsockopt,
9678 .sendmsg = sctp_sendmsg,
9679 .recvmsg = sctp_recvmsg,
9681 .bind_add = sctp_bind_add,
9682 .backlog_rcv = sctp_backlog_rcv,
9684 .unhash = sctp_unhash,
9685 .no_autobind = true,
9686 .obj_size = sizeof(struct sctp6_sock),
9687 .useroffset = offsetof(struct sctp6_sock, sctp.subscribe),
9688 .usersize = offsetof(struct sctp6_sock, sctp.initmsg) -
9689 offsetof(struct sctp6_sock, sctp.subscribe) +
9690 sizeof_field(struct sctp6_sock, sctp.initmsg),
9691 .sysctl_mem = sysctl_sctp_mem,
9692 .sysctl_rmem = sysctl_sctp_rmem,
9693 .sysctl_wmem = sysctl_sctp_wmem,
9694 .memory_pressure = &sctp_memory_pressure,
9695 .enter_memory_pressure = sctp_enter_memory_pressure,
9696 .memory_allocated = &sctp_memory_allocated,
9697 .sockets_allocated = &sctp_sockets_allocated,
9699 #endif /* IS_ENABLED(CONFIG_IPV6) */