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(sctp_callback_t cb, struct net *net,
5321 const union sctp_addr *laddr,
5322 const union sctp_addr *paddr, void *p)
5324 struct sctp_transport *transport;
5325 struct sctp_endpoint *ep;
5329 transport = sctp_addrs_lookup_transport(net, laddr, paddr);
5334 ep = transport->asoc->ep;
5335 if (!sctp_endpoint_hold(ep)) { /* asoc can be peeled off */
5336 sctp_transport_put(transport);
5342 err = cb(ep, transport, p);
5343 sctp_endpoint_put(ep);
5344 sctp_transport_put(transport);
5347 EXPORT_SYMBOL_GPL(sctp_transport_lookup_process);
5349 int sctp_transport_traverse_process(sctp_callback_t cb, sctp_callback_t cb_done,
5350 struct net *net, int *pos, void *p)
5352 struct rhashtable_iter hti;
5353 struct sctp_transport *tsp;
5354 struct sctp_endpoint *ep;
5359 sctp_transport_walk_start(&hti);
5361 tsp = sctp_transport_get_idx(net, &hti, *pos + 1);
5362 for (; !IS_ERR_OR_NULL(tsp); tsp = sctp_transport_get_next(net, &hti)) {
5364 if (sctp_endpoint_hold(ep)) { /* asoc can be peeled off */
5365 ret = cb(ep, tsp, p);
5368 sctp_endpoint_put(ep);
5371 sctp_transport_put(tsp);
5373 sctp_transport_walk_stop(&hti);
5376 if (cb_done && !cb_done(ep, tsp, p)) {
5378 sctp_endpoint_put(ep);
5379 sctp_transport_put(tsp);
5382 sctp_endpoint_put(ep);
5383 sctp_transport_put(tsp);
5388 EXPORT_SYMBOL_GPL(sctp_transport_traverse_process);
5390 /* 7.2.1 Association Status (SCTP_STATUS)
5392 * Applications can retrieve current status information about an
5393 * association, including association state, peer receiver window size,
5394 * number of unacked data chunks, and number of data chunks pending
5395 * receipt. This information is read-only.
5397 static int sctp_getsockopt_sctp_status(struct sock *sk, int len,
5398 char __user *optval,
5401 struct sctp_status status;
5402 struct sctp_association *asoc = NULL;
5403 struct sctp_transport *transport;
5404 sctp_assoc_t associd;
5407 if (len < sizeof(status)) {
5412 len = sizeof(status);
5413 if (copy_from_user(&status, optval, len)) {
5418 associd = status.sstat_assoc_id;
5419 asoc = sctp_id2assoc(sk, associd);
5425 transport = asoc->peer.primary_path;
5427 status.sstat_assoc_id = sctp_assoc2id(asoc);
5428 status.sstat_state = sctp_assoc_to_state(asoc);
5429 status.sstat_rwnd = asoc->peer.rwnd;
5430 status.sstat_unackdata = asoc->unack_data;
5432 status.sstat_penddata = sctp_tsnmap_pending(&asoc->peer.tsn_map);
5433 status.sstat_instrms = asoc->stream.incnt;
5434 status.sstat_outstrms = asoc->stream.outcnt;
5435 status.sstat_fragmentation_point = asoc->frag_point;
5436 status.sstat_primary.spinfo_assoc_id = sctp_assoc2id(transport->asoc);
5437 memcpy(&status.sstat_primary.spinfo_address, &transport->ipaddr,
5438 transport->af_specific->sockaddr_len);
5439 /* Map ipv4 address into v4-mapped-on-v6 address. */
5440 sctp_get_pf_specific(sk->sk_family)->addr_to_user(sctp_sk(sk),
5441 (union sctp_addr *)&status.sstat_primary.spinfo_address);
5442 status.sstat_primary.spinfo_state = transport->state;
5443 status.sstat_primary.spinfo_cwnd = transport->cwnd;
5444 status.sstat_primary.spinfo_srtt = transport->srtt;
5445 status.sstat_primary.spinfo_rto = jiffies_to_msecs(transport->rto);
5446 status.sstat_primary.spinfo_mtu = transport->pathmtu;
5448 if (status.sstat_primary.spinfo_state == SCTP_UNKNOWN)
5449 status.sstat_primary.spinfo_state = SCTP_ACTIVE;
5451 if (put_user(len, optlen)) {
5456 pr_debug("%s: len:%d, state:%d, rwnd:%d, assoc_id:%d\n",
5457 __func__, len, status.sstat_state, status.sstat_rwnd,
5458 status.sstat_assoc_id);
5460 if (copy_to_user(optval, &status, len)) {
5470 /* 7.2.2 Peer Address Information (SCTP_GET_PEER_ADDR_INFO)
5472 * Applications can retrieve information about a specific peer address
5473 * of an association, including its reachability state, congestion
5474 * window, and retransmission timer values. This information is
5477 static int sctp_getsockopt_peer_addr_info(struct sock *sk, int len,
5478 char __user *optval,
5481 struct sctp_paddrinfo pinfo;
5482 struct sctp_transport *transport;
5485 if (len < sizeof(pinfo)) {
5490 len = sizeof(pinfo);
5491 if (copy_from_user(&pinfo, optval, len)) {
5496 transport = sctp_addr_id2transport(sk, &pinfo.spinfo_address,
5497 pinfo.spinfo_assoc_id);
5503 if (transport->state == SCTP_PF &&
5504 transport->asoc->pf_expose == SCTP_PF_EXPOSE_DISABLE) {
5509 pinfo.spinfo_assoc_id = sctp_assoc2id(transport->asoc);
5510 pinfo.spinfo_state = transport->state;
5511 pinfo.spinfo_cwnd = transport->cwnd;
5512 pinfo.spinfo_srtt = transport->srtt;
5513 pinfo.spinfo_rto = jiffies_to_msecs(transport->rto);
5514 pinfo.spinfo_mtu = transport->pathmtu;
5516 if (pinfo.spinfo_state == SCTP_UNKNOWN)
5517 pinfo.spinfo_state = SCTP_ACTIVE;
5519 if (put_user(len, optlen)) {
5524 if (copy_to_user(optval, &pinfo, len)) {
5533 /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS)
5535 * This option is a on/off flag. If enabled no SCTP message
5536 * fragmentation will be performed. Instead if a message being sent
5537 * exceeds the current PMTU size, the message will NOT be sent and
5538 * instead a error will be indicated to the user.
5540 static int sctp_getsockopt_disable_fragments(struct sock *sk, int len,
5541 char __user *optval, int __user *optlen)
5545 if (len < sizeof(int))
5549 val = (sctp_sk(sk)->disable_fragments == 1);
5550 if (put_user(len, optlen))
5552 if (copy_to_user(optval, &val, len))
5557 /* 7.1.15 Set notification and ancillary events (SCTP_EVENTS)
5559 * This socket option is used to specify various notifications and
5560 * ancillary data the user wishes to receive.
5562 static int sctp_getsockopt_events(struct sock *sk, int len, char __user *optval,
5565 struct sctp_event_subscribe subscribe;
5566 __u8 *sn_type = (__u8 *)&subscribe;
5571 if (len > sizeof(struct sctp_event_subscribe))
5572 len = sizeof(struct sctp_event_subscribe);
5573 if (put_user(len, optlen))
5576 for (i = 0; i < len; i++)
5577 sn_type[i] = sctp_ulpevent_type_enabled(sctp_sk(sk)->subscribe,
5578 SCTP_SN_TYPE_BASE + i);
5580 if (copy_to_user(optval, &subscribe, len))
5586 /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE)
5588 * This socket option is applicable to the UDP-style socket only. When
5589 * set it will cause associations that are idle for more than the
5590 * specified number of seconds to automatically close. An association
5591 * being idle is defined an association that has NOT sent or received
5592 * user data. The special value of '0' indicates that no automatic
5593 * close of any associations should be performed. The option expects an
5594 * integer defining the number of seconds of idle time before an
5595 * association is closed.
5597 static int sctp_getsockopt_autoclose(struct sock *sk, int len, char __user *optval, int __user *optlen)
5599 /* Applicable to UDP-style socket only */
5600 if (sctp_style(sk, TCP))
5602 if (len < sizeof(int))
5605 if (put_user(len, optlen))
5607 if (put_user(sctp_sk(sk)->autoclose, (int __user *)optval))
5612 /* Helper routine to branch off an association to a new socket. */
5613 int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp)
5615 struct sctp_association *asoc = sctp_id2assoc(sk, id);
5616 struct sctp_sock *sp = sctp_sk(sk);
5617 struct socket *sock;
5620 /* Do not peel off from one netns to another one. */
5621 if (!net_eq(current->nsproxy->net_ns, sock_net(sk)))
5627 /* An association cannot be branched off from an already peeled-off
5628 * socket, nor is this supported for tcp style sockets.
5630 if (!sctp_style(sk, UDP))
5633 /* Create a new socket. */
5634 err = sock_create(sk->sk_family, SOCK_SEQPACKET, IPPROTO_SCTP, &sock);
5638 sctp_copy_sock(sock->sk, sk, asoc);
5640 /* Make peeled-off sockets more like 1-1 accepted sockets.
5641 * Set the daddr and initialize id to something more random and also
5642 * copy over any ip options.
5644 sp->pf->to_sk_daddr(&asoc->peer.primary_addr, sock->sk);
5645 sp->pf->copy_ip_options(sk, sock->sk);
5647 /* Populate the fields of the newsk from the oldsk and migrate the
5648 * asoc to the newsk.
5650 err = sctp_sock_migrate(sk, sock->sk, asoc,
5651 SCTP_SOCKET_UDP_HIGH_BANDWIDTH);
5661 EXPORT_SYMBOL(sctp_do_peeloff);
5663 static int sctp_getsockopt_peeloff_common(struct sock *sk, sctp_peeloff_arg_t *peeloff,
5664 struct file **newfile, unsigned flags)
5666 struct socket *newsock;
5669 retval = sctp_do_peeloff(sk, peeloff->associd, &newsock);
5673 /* Map the socket to an unused fd that can be returned to the user. */
5674 retval = get_unused_fd_flags(flags & SOCK_CLOEXEC);
5676 sock_release(newsock);
5680 *newfile = sock_alloc_file(newsock, 0, NULL);
5681 if (IS_ERR(*newfile)) {
5682 put_unused_fd(retval);
5683 retval = PTR_ERR(*newfile);
5688 pr_debug("%s: sk:%p, newsk:%p, sd:%d\n", __func__, sk, newsock->sk,
5691 peeloff->sd = retval;
5693 if (flags & SOCK_NONBLOCK)
5694 (*newfile)->f_flags |= O_NONBLOCK;
5699 static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval, int __user *optlen)
5701 sctp_peeloff_arg_t peeloff;
5702 struct file *newfile = NULL;
5705 if (len < sizeof(sctp_peeloff_arg_t))
5707 len = sizeof(sctp_peeloff_arg_t);
5708 if (copy_from_user(&peeloff, optval, len))
5711 retval = sctp_getsockopt_peeloff_common(sk, &peeloff, &newfile, 0);
5715 /* Return the fd mapped to the new socket. */
5716 if (put_user(len, optlen)) {
5718 put_unused_fd(retval);
5722 if (copy_to_user(optval, &peeloff, len)) {
5724 put_unused_fd(retval);
5727 fd_install(retval, newfile);
5732 static int sctp_getsockopt_peeloff_flags(struct sock *sk, int len,
5733 char __user *optval, int __user *optlen)
5735 sctp_peeloff_flags_arg_t peeloff;
5736 struct file *newfile = NULL;
5739 if (len < sizeof(sctp_peeloff_flags_arg_t))
5741 len = sizeof(sctp_peeloff_flags_arg_t);
5742 if (copy_from_user(&peeloff, optval, len))
5745 retval = sctp_getsockopt_peeloff_common(sk, &peeloff.p_arg,
5746 &newfile, peeloff.flags);
5750 /* Return the fd mapped to the new socket. */
5751 if (put_user(len, optlen)) {
5753 put_unused_fd(retval);
5757 if (copy_to_user(optval, &peeloff, len)) {
5759 put_unused_fd(retval);
5762 fd_install(retval, newfile);
5767 /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS)
5769 * Applications can enable or disable heartbeats for any peer address of
5770 * an association, modify an address's heartbeat interval, force a
5771 * heartbeat to be sent immediately, and adjust the address's maximum
5772 * number of retransmissions sent before an address is considered
5773 * unreachable. The following structure is used to access and modify an
5774 * address's parameters:
5776 * struct sctp_paddrparams {
5777 * sctp_assoc_t spp_assoc_id;
5778 * struct sockaddr_storage spp_address;
5779 * uint32_t spp_hbinterval;
5780 * uint16_t spp_pathmaxrxt;
5781 * uint32_t spp_pathmtu;
5782 * uint32_t spp_sackdelay;
5783 * uint32_t spp_flags;
5786 * spp_assoc_id - (one-to-many style socket) This is filled in the
5787 * application, and identifies the association for
5789 * spp_address - This specifies which address is of interest.
5790 * spp_hbinterval - This contains the value of the heartbeat interval,
5791 * in milliseconds. If a value of zero
5792 * is present in this field then no changes are to
5793 * be made to this parameter.
5794 * spp_pathmaxrxt - This contains the maximum number of
5795 * retransmissions before this address shall be
5796 * considered unreachable. If a value of zero
5797 * is present in this field then no changes are to
5798 * be made to this parameter.
5799 * spp_pathmtu - When Path MTU discovery is disabled the value
5800 * specified here will be the "fixed" path mtu.
5801 * Note that if the spp_address field is empty
5802 * then all associations on this address will
5803 * have this fixed path mtu set upon them.
5805 * spp_sackdelay - When delayed sack is enabled, this value specifies
5806 * the number of milliseconds that sacks will be delayed
5807 * for. This value will apply to all addresses of an
5808 * association if the spp_address field is empty. Note
5809 * also, that if delayed sack is enabled and this
5810 * value is set to 0, no change is made to the last
5811 * recorded delayed sack timer value.
5813 * spp_flags - These flags are used to control various features
5814 * on an association. The flag field may contain
5815 * zero or more of the following options.
5817 * SPP_HB_ENABLE - Enable heartbeats on the
5818 * specified address. Note that if the address
5819 * field is empty all addresses for the association
5820 * have heartbeats enabled upon them.
5822 * SPP_HB_DISABLE - Disable heartbeats on the
5823 * speicifed address. Note that if the address
5824 * field is empty all addresses for the association
5825 * will have their heartbeats disabled. Note also
5826 * that SPP_HB_ENABLE and SPP_HB_DISABLE are
5827 * mutually exclusive, only one of these two should
5828 * be specified. Enabling both fields will have
5829 * undetermined results.
5831 * SPP_HB_DEMAND - Request a user initiated heartbeat
5832 * to be made immediately.
5834 * SPP_PMTUD_ENABLE - This field will enable PMTU
5835 * discovery upon the specified address. Note that
5836 * if the address feild is empty then all addresses
5837 * on the association are effected.
5839 * SPP_PMTUD_DISABLE - This field will disable PMTU
5840 * discovery upon the specified address. Note that
5841 * if the address feild is empty then all addresses
5842 * on the association are effected. Not also that
5843 * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually
5844 * exclusive. Enabling both will have undetermined
5847 * SPP_SACKDELAY_ENABLE - Setting this flag turns
5848 * on delayed sack. The time specified in spp_sackdelay
5849 * is used to specify the sack delay for this address. Note
5850 * that if spp_address is empty then all addresses will
5851 * enable delayed sack and take on the sack delay
5852 * value specified in spp_sackdelay.
5853 * SPP_SACKDELAY_DISABLE - Setting this flag turns
5854 * off delayed sack. If the spp_address field is blank then
5855 * delayed sack is disabled for the entire association. Note
5856 * also that this field is mutually exclusive to
5857 * SPP_SACKDELAY_ENABLE, setting both will have undefined
5860 * SPP_IPV6_FLOWLABEL: Setting this flag enables the
5861 * setting of the IPV6 flow label value. The value is
5862 * contained in the spp_ipv6_flowlabel field.
5863 * Upon retrieval, this flag will be set to indicate that
5864 * the spp_ipv6_flowlabel field has a valid value returned.
5865 * If a specific destination address is set (in the
5866 * spp_address field), then the value returned is that of
5867 * the address. If just an association is specified (and
5868 * no address), then the association's default flow label
5869 * is returned. If neither an association nor a destination
5870 * is specified, then the socket's default flow label is
5871 * returned. For non-IPv6 sockets, this flag will be left
5874 * SPP_DSCP: Setting this flag enables the setting of the
5875 * Differentiated Services Code Point (DSCP) value
5876 * associated with either the association or a specific
5877 * address. The value is obtained in the spp_dscp field.
5878 * Upon retrieval, this flag will be set to indicate that
5879 * the spp_dscp field has a valid value returned. If a
5880 * specific destination address is set when called (in the
5881 * spp_address field), then that specific destination
5882 * address's DSCP value is returned. If just an association
5883 * is specified, then the association's default DSCP is
5884 * returned. If neither an association nor a destination is
5885 * specified, then the socket's default DSCP is returned.
5887 * spp_ipv6_flowlabel
5888 * - This field is used in conjunction with the
5889 * SPP_IPV6_FLOWLABEL flag and contains the IPv6 flow label.
5890 * The 20 least significant bits are used for the flow
5891 * label. This setting has precedence over any IPv6-layer
5894 * spp_dscp - This field is used in conjunction with the SPP_DSCP flag
5895 * and contains the DSCP. The 6 most significant bits are
5896 * used for the DSCP. This setting has precedence over any
5897 * IPv4- or IPv6- layer setting.
5899 static int sctp_getsockopt_peer_addr_params(struct sock *sk, int len,
5900 char __user *optval, int __user *optlen)
5902 struct sctp_paddrparams params;
5903 struct sctp_transport *trans = NULL;
5904 struct sctp_association *asoc = NULL;
5905 struct sctp_sock *sp = sctp_sk(sk);
5907 if (len >= sizeof(params))
5908 len = sizeof(params);
5909 else if (len >= ALIGN(offsetof(struct sctp_paddrparams,
5910 spp_ipv6_flowlabel), 4))
5911 len = ALIGN(offsetof(struct sctp_paddrparams,
5912 spp_ipv6_flowlabel), 4);
5916 if (copy_from_user(¶ms, optval, len))
5919 /* If an address other than INADDR_ANY is specified, and
5920 * no transport is found, then the request is invalid.
5922 if (!sctp_is_any(sk, (union sctp_addr *)¶ms.spp_address)) {
5923 trans = sctp_addr_id2transport(sk, ¶ms.spp_address,
5924 params.spp_assoc_id);
5926 pr_debug("%s: failed no transport\n", __func__);
5931 /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
5932 * socket is a one to many style socket, and an association
5933 * was not found, then the id was invalid.
5935 asoc = sctp_id2assoc(sk, params.spp_assoc_id);
5936 if (!asoc && params.spp_assoc_id != SCTP_FUTURE_ASSOC &&
5937 sctp_style(sk, UDP)) {
5938 pr_debug("%s: failed no association\n", __func__);
5943 /* Fetch transport values. */
5944 params.spp_hbinterval = jiffies_to_msecs(trans->hbinterval);
5945 params.spp_pathmtu = trans->pathmtu;
5946 params.spp_pathmaxrxt = trans->pathmaxrxt;
5947 params.spp_sackdelay = jiffies_to_msecs(trans->sackdelay);
5949 /*draft-11 doesn't say what to return in spp_flags*/
5950 params.spp_flags = trans->param_flags;
5951 if (trans->flowlabel & SCTP_FLOWLABEL_SET_MASK) {
5952 params.spp_ipv6_flowlabel = trans->flowlabel &
5953 SCTP_FLOWLABEL_VAL_MASK;
5954 params.spp_flags |= SPP_IPV6_FLOWLABEL;
5956 if (trans->dscp & SCTP_DSCP_SET_MASK) {
5957 params.spp_dscp = trans->dscp & SCTP_DSCP_VAL_MASK;
5958 params.spp_flags |= SPP_DSCP;
5961 /* Fetch association values. */
5962 params.spp_hbinterval = jiffies_to_msecs(asoc->hbinterval);
5963 params.spp_pathmtu = asoc->pathmtu;
5964 params.spp_pathmaxrxt = asoc->pathmaxrxt;
5965 params.spp_sackdelay = jiffies_to_msecs(asoc->sackdelay);
5967 /*draft-11 doesn't say what to return in spp_flags*/
5968 params.spp_flags = asoc->param_flags;
5969 if (asoc->flowlabel & SCTP_FLOWLABEL_SET_MASK) {
5970 params.spp_ipv6_flowlabel = asoc->flowlabel &
5971 SCTP_FLOWLABEL_VAL_MASK;
5972 params.spp_flags |= SPP_IPV6_FLOWLABEL;
5974 if (asoc->dscp & SCTP_DSCP_SET_MASK) {
5975 params.spp_dscp = asoc->dscp & SCTP_DSCP_VAL_MASK;
5976 params.spp_flags |= SPP_DSCP;
5979 /* Fetch socket values. */
5980 params.spp_hbinterval = sp->hbinterval;
5981 params.spp_pathmtu = sp->pathmtu;
5982 params.spp_sackdelay = sp->sackdelay;
5983 params.spp_pathmaxrxt = sp->pathmaxrxt;
5985 /*draft-11 doesn't say what to return in spp_flags*/
5986 params.spp_flags = sp->param_flags;
5987 if (sp->flowlabel & SCTP_FLOWLABEL_SET_MASK) {
5988 params.spp_ipv6_flowlabel = sp->flowlabel &
5989 SCTP_FLOWLABEL_VAL_MASK;
5990 params.spp_flags |= SPP_IPV6_FLOWLABEL;
5992 if (sp->dscp & SCTP_DSCP_SET_MASK) {
5993 params.spp_dscp = sp->dscp & SCTP_DSCP_VAL_MASK;
5994 params.spp_flags |= SPP_DSCP;
5998 if (copy_to_user(optval, ¶ms, len))
6001 if (put_user(len, optlen))
6008 * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK)
6010 * This option will effect the way delayed acks are performed. This
6011 * option allows you to get or set the delayed ack time, in
6012 * milliseconds. It also allows changing the delayed ack frequency.
6013 * Changing the frequency to 1 disables the delayed sack algorithm. If
6014 * the assoc_id is 0, then this sets or gets the endpoints default
6015 * values. If the assoc_id field is non-zero, then the set or get
6016 * effects the specified association for the one to many model (the
6017 * assoc_id field is ignored by the one to one model). Note that if
6018 * sack_delay or sack_freq are 0 when setting this option, then the
6019 * current values will remain unchanged.
6021 * struct sctp_sack_info {
6022 * sctp_assoc_t sack_assoc_id;
6023 * uint32_t sack_delay;
6024 * uint32_t sack_freq;
6027 * sack_assoc_id - This parameter, indicates which association the user
6028 * is performing an action upon. Note that if this field's value is
6029 * zero then the endpoints default value is changed (effecting future
6030 * associations only).
6032 * sack_delay - This parameter contains the number of milliseconds that
6033 * the user is requesting the delayed ACK timer be set to. Note that
6034 * this value is defined in the standard to be between 200 and 500
6037 * sack_freq - This parameter contains the number of packets that must
6038 * be received before a sack is sent without waiting for the delay
6039 * timer to expire. The default value for this is 2, setting this
6040 * value to 1 will disable the delayed sack algorithm.
6042 static int sctp_getsockopt_delayed_ack(struct sock *sk, int len,
6043 char __user *optval,
6046 struct sctp_sack_info params;
6047 struct sctp_association *asoc = NULL;
6048 struct sctp_sock *sp = sctp_sk(sk);
6050 if (len >= sizeof(struct sctp_sack_info)) {
6051 len = sizeof(struct sctp_sack_info);
6053 if (copy_from_user(¶ms, optval, len))
6055 } else if (len == sizeof(struct sctp_assoc_value)) {
6056 pr_warn_ratelimited(DEPRECATED
6058 "Use of struct sctp_assoc_value in delayed_ack socket option.\n"
6059 "Use struct sctp_sack_info instead\n",
6060 current->comm, task_pid_nr(current));
6061 if (copy_from_user(¶ms, optval, len))
6066 /* Get association, if sack_assoc_id != SCTP_FUTURE_ASSOC and the
6067 * socket is a one to many style socket, and an association
6068 * was not found, then the id was invalid.
6070 asoc = sctp_id2assoc(sk, params.sack_assoc_id);
6071 if (!asoc && params.sack_assoc_id != SCTP_FUTURE_ASSOC &&
6072 sctp_style(sk, UDP))
6076 /* Fetch association values. */
6077 if (asoc->param_flags & SPP_SACKDELAY_ENABLE) {
6078 params.sack_delay = jiffies_to_msecs(asoc->sackdelay);
6079 params.sack_freq = asoc->sackfreq;
6082 params.sack_delay = 0;
6083 params.sack_freq = 1;
6086 /* Fetch socket values. */
6087 if (sp->param_flags & SPP_SACKDELAY_ENABLE) {
6088 params.sack_delay = sp->sackdelay;
6089 params.sack_freq = sp->sackfreq;
6091 params.sack_delay = 0;
6092 params.sack_freq = 1;
6096 if (copy_to_user(optval, ¶ms, len))
6099 if (put_user(len, optlen))
6105 /* 7.1.3 Initialization Parameters (SCTP_INITMSG)
6107 * Applications can specify protocol parameters for the default association
6108 * initialization. The option name argument to setsockopt() and getsockopt()
6111 * Setting initialization parameters is effective only on an unconnected
6112 * socket (for UDP-style sockets only future associations are effected
6113 * by the change). With TCP-style sockets, this option is inherited by
6114 * sockets derived from a listener socket.
6116 static int sctp_getsockopt_initmsg(struct sock *sk, int len, char __user *optval, int __user *optlen)
6118 if (len < sizeof(struct sctp_initmsg))
6120 len = sizeof(struct sctp_initmsg);
6121 if (put_user(len, optlen))
6123 if (copy_to_user(optval, &sctp_sk(sk)->initmsg, len))
6129 static int sctp_getsockopt_peer_addrs(struct sock *sk, int len,
6130 char __user *optval, int __user *optlen)
6132 struct sctp_association *asoc;
6134 struct sctp_getaddrs getaddrs;
6135 struct sctp_transport *from;
6137 union sctp_addr temp;
6138 struct sctp_sock *sp = sctp_sk(sk);
6143 if (len < sizeof(struct sctp_getaddrs))
6146 if (copy_from_user(&getaddrs, optval, sizeof(struct sctp_getaddrs)))
6149 /* For UDP-style sockets, id specifies the association to query. */
6150 asoc = sctp_id2assoc(sk, getaddrs.assoc_id);
6154 to = optval + offsetof(struct sctp_getaddrs, addrs);
6155 space_left = len - offsetof(struct sctp_getaddrs, addrs);
6157 list_for_each_entry(from, &asoc->peer.transport_addr_list,
6159 memcpy(&temp, &from->ipaddr, sizeof(temp));
6160 addrlen = sctp_get_pf_specific(sk->sk_family)
6161 ->addr_to_user(sp, &temp);
6162 if (space_left < addrlen)
6164 if (copy_to_user(to, &temp, addrlen))
6168 space_left -= addrlen;
6171 if (put_user(cnt, &((struct sctp_getaddrs __user *)optval)->addr_num))
6173 bytes_copied = ((char __user *)to) - optval;
6174 if (put_user(bytes_copied, optlen))
6180 static int sctp_copy_laddrs(struct sock *sk, __u16 port, void *to,
6181 size_t space_left, int *bytes_copied)
6183 struct sctp_sockaddr_entry *addr;
6184 union sctp_addr temp;
6187 struct net *net = sock_net(sk);
6190 list_for_each_entry_rcu(addr, &net->sctp.local_addr_list, list) {
6194 if ((PF_INET == sk->sk_family) &&
6195 (AF_INET6 == addr->a.sa.sa_family))
6197 if ((PF_INET6 == sk->sk_family) &&
6198 inet_v6_ipv6only(sk) &&
6199 (AF_INET == addr->a.sa.sa_family))
6201 memcpy(&temp, &addr->a, sizeof(temp));
6202 if (!temp.v4.sin_port)
6203 temp.v4.sin_port = htons(port);
6205 addrlen = sctp_get_pf_specific(sk->sk_family)
6206 ->addr_to_user(sctp_sk(sk), &temp);
6208 if (space_left < addrlen) {
6212 memcpy(to, &temp, addrlen);
6216 space_left -= addrlen;
6217 *bytes_copied += addrlen;
6225 static int sctp_getsockopt_local_addrs(struct sock *sk, int len,
6226 char __user *optval, int __user *optlen)
6228 struct sctp_bind_addr *bp;
6229 struct sctp_association *asoc;
6231 struct sctp_getaddrs getaddrs;
6232 struct sctp_sockaddr_entry *addr;
6234 union sctp_addr temp;
6235 struct sctp_sock *sp = sctp_sk(sk);
6239 int bytes_copied = 0;
6243 if (len < sizeof(struct sctp_getaddrs))
6246 if (copy_from_user(&getaddrs, optval, sizeof(struct sctp_getaddrs)))
6250 * For UDP-style sockets, id specifies the association to query.
6251 * If the id field is set to the value '0' then the locally bound
6252 * addresses are returned without regard to any particular
6255 if (0 == getaddrs.assoc_id) {
6256 bp = &sctp_sk(sk)->ep->base.bind_addr;
6258 asoc = sctp_id2assoc(sk, getaddrs.assoc_id);
6261 bp = &asoc->base.bind_addr;
6264 to = optval + offsetof(struct sctp_getaddrs, addrs);
6265 space_left = len - offsetof(struct sctp_getaddrs, addrs);
6267 addrs = kmalloc(space_left, GFP_USER | __GFP_NOWARN);
6271 /* If the endpoint is bound to 0.0.0.0 or ::0, get the valid
6272 * addresses from the global local address list.
6274 if (sctp_list_single_entry(&bp->address_list)) {
6275 addr = list_entry(bp->address_list.next,
6276 struct sctp_sockaddr_entry, list);
6277 if (sctp_is_any(sk, &addr->a)) {
6278 cnt = sctp_copy_laddrs(sk, bp->port, addrs,
6279 space_left, &bytes_copied);
6289 /* Protection on the bound address list is not needed since
6290 * in the socket option context we hold a socket lock and
6291 * thus the bound address list can't change.
6293 list_for_each_entry(addr, &bp->address_list, list) {
6294 memcpy(&temp, &addr->a, sizeof(temp));
6295 addrlen = sctp_get_pf_specific(sk->sk_family)
6296 ->addr_to_user(sp, &temp);
6297 if (space_left < addrlen) {
6298 err = -ENOMEM; /*fixme: right error?*/
6301 memcpy(buf, &temp, addrlen);
6303 bytes_copied += addrlen;
6305 space_left -= addrlen;
6309 if (copy_to_user(to, addrs, bytes_copied)) {
6313 if (put_user(cnt, &((struct sctp_getaddrs __user *)optval)->addr_num)) {
6317 /* XXX: We should have accounted for sizeof(struct sctp_getaddrs) too,
6318 * but we can't change it anymore.
6320 if (put_user(bytes_copied, optlen))
6327 /* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
6329 * Requests that the local SCTP stack use the enclosed peer address as
6330 * the association primary. The enclosed address must be one of the
6331 * association peer's addresses.
6333 static int sctp_getsockopt_primary_addr(struct sock *sk, int len,
6334 char __user *optval, int __user *optlen)
6336 struct sctp_prim prim;
6337 struct sctp_association *asoc;
6338 struct sctp_sock *sp = sctp_sk(sk);
6340 if (len < sizeof(struct sctp_prim))
6343 len = sizeof(struct sctp_prim);
6345 if (copy_from_user(&prim, optval, len))
6348 asoc = sctp_id2assoc(sk, prim.ssp_assoc_id);
6352 if (!asoc->peer.primary_path)
6355 memcpy(&prim.ssp_addr, &asoc->peer.primary_path->ipaddr,
6356 asoc->peer.primary_path->af_specific->sockaddr_len);
6358 sctp_get_pf_specific(sk->sk_family)->addr_to_user(sp,
6359 (union sctp_addr *)&prim.ssp_addr);
6361 if (put_user(len, optlen))
6363 if (copy_to_user(optval, &prim, len))
6370 * 7.1.11 Set Adaptation Layer Indicator (SCTP_ADAPTATION_LAYER)
6372 * Requests that the local endpoint set the specified Adaptation Layer
6373 * Indication parameter for all future INIT and INIT-ACK exchanges.
6375 static int sctp_getsockopt_adaptation_layer(struct sock *sk, int len,
6376 char __user *optval, int __user *optlen)
6378 struct sctp_setadaptation adaptation;
6380 if (len < sizeof(struct sctp_setadaptation))
6383 len = sizeof(struct sctp_setadaptation);
6385 adaptation.ssb_adaptation_ind = sctp_sk(sk)->adaptation_ind;
6387 if (put_user(len, optlen))
6389 if (copy_to_user(optval, &adaptation, len))
6397 * 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM)
6399 * Applications that wish to use the sendto() system call may wish to
6400 * specify a default set of parameters that would normally be supplied
6401 * through the inclusion of ancillary data. This socket option allows
6402 * such an application to set the default sctp_sndrcvinfo structure.
6405 * The application that wishes to use this socket option simply passes
6406 * in to this call the sctp_sndrcvinfo structure defined in Section
6407 * 5.2.2) The input parameters accepted by this call include
6408 * sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context,
6409 * sinfo_timetolive. The user must provide the sinfo_assoc_id field in
6410 * to this call if the caller is using the UDP model.
6412 * For getsockopt, it get the default sctp_sndrcvinfo structure.
6414 static int sctp_getsockopt_default_send_param(struct sock *sk,
6415 int len, char __user *optval,
6418 struct sctp_sock *sp = sctp_sk(sk);
6419 struct sctp_association *asoc;
6420 struct sctp_sndrcvinfo info;
6422 if (len < sizeof(info))
6427 if (copy_from_user(&info, optval, len))
6430 asoc = sctp_id2assoc(sk, info.sinfo_assoc_id);
6431 if (!asoc && info.sinfo_assoc_id != SCTP_FUTURE_ASSOC &&
6432 sctp_style(sk, UDP))
6436 info.sinfo_stream = asoc->default_stream;
6437 info.sinfo_flags = asoc->default_flags;
6438 info.sinfo_ppid = asoc->default_ppid;
6439 info.sinfo_context = asoc->default_context;
6440 info.sinfo_timetolive = asoc->default_timetolive;
6442 info.sinfo_stream = sp->default_stream;
6443 info.sinfo_flags = sp->default_flags;
6444 info.sinfo_ppid = sp->default_ppid;
6445 info.sinfo_context = sp->default_context;
6446 info.sinfo_timetolive = sp->default_timetolive;
6449 if (put_user(len, optlen))
6451 if (copy_to_user(optval, &info, len))
6457 /* RFC6458, Section 8.1.31. Set/get Default Send Parameters
6458 * (SCTP_DEFAULT_SNDINFO)
6460 static int sctp_getsockopt_default_sndinfo(struct sock *sk, int len,
6461 char __user *optval,
6464 struct sctp_sock *sp = sctp_sk(sk);
6465 struct sctp_association *asoc;
6466 struct sctp_sndinfo info;
6468 if (len < sizeof(info))
6473 if (copy_from_user(&info, optval, len))
6476 asoc = sctp_id2assoc(sk, info.snd_assoc_id);
6477 if (!asoc && info.snd_assoc_id != SCTP_FUTURE_ASSOC &&
6478 sctp_style(sk, UDP))
6482 info.snd_sid = asoc->default_stream;
6483 info.snd_flags = asoc->default_flags;
6484 info.snd_ppid = asoc->default_ppid;
6485 info.snd_context = asoc->default_context;
6487 info.snd_sid = sp->default_stream;
6488 info.snd_flags = sp->default_flags;
6489 info.snd_ppid = sp->default_ppid;
6490 info.snd_context = sp->default_context;
6493 if (put_user(len, optlen))
6495 if (copy_to_user(optval, &info, len))
6503 * 7.1.5 SCTP_NODELAY
6505 * Turn on/off any Nagle-like algorithm. This means that packets are
6506 * generally sent as soon as possible and no unnecessary delays are
6507 * introduced, at the cost of more packets in the network. Expects an
6508 * integer boolean flag.
6511 static int sctp_getsockopt_nodelay(struct sock *sk, int len,
6512 char __user *optval, int __user *optlen)
6516 if (len < sizeof(int))
6520 val = (sctp_sk(sk)->nodelay == 1);
6521 if (put_user(len, optlen))
6523 if (copy_to_user(optval, &val, len))
6530 * 7.1.1 SCTP_RTOINFO
6532 * The protocol parameters used to initialize and bound retransmission
6533 * timeout (RTO) are tunable. sctp_rtoinfo structure is used to access
6534 * and modify these parameters.
6535 * All parameters are time values, in milliseconds. A value of 0, when
6536 * modifying the parameters, indicates that the current value should not
6540 static int sctp_getsockopt_rtoinfo(struct sock *sk, int len,
6541 char __user *optval,
6542 int __user *optlen) {
6543 struct sctp_rtoinfo rtoinfo;
6544 struct sctp_association *asoc;
6546 if (len < sizeof (struct sctp_rtoinfo))
6549 len = sizeof(struct sctp_rtoinfo);
6551 if (copy_from_user(&rtoinfo, optval, len))
6554 asoc = sctp_id2assoc(sk, rtoinfo.srto_assoc_id);
6556 if (!asoc && rtoinfo.srto_assoc_id != SCTP_FUTURE_ASSOC &&
6557 sctp_style(sk, UDP))
6560 /* Values corresponding to the specific association. */
6562 rtoinfo.srto_initial = jiffies_to_msecs(asoc->rto_initial);
6563 rtoinfo.srto_max = jiffies_to_msecs(asoc->rto_max);
6564 rtoinfo.srto_min = jiffies_to_msecs(asoc->rto_min);
6566 /* Values corresponding to the endpoint. */
6567 struct sctp_sock *sp = sctp_sk(sk);
6569 rtoinfo.srto_initial = sp->rtoinfo.srto_initial;
6570 rtoinfo.srto_max = sp->rtoinfo.srto_max;
6571 rtoinfo.srto_min = sp->rtoinfo.srto_min;
6574 if (put_user(len, optlen))
6577 if (copy_to_user(optval, &rtoinfo, len))
6585 * 7.1.2 SCTP_ASSOCINFO
6587 * This option is used to tune the maximum retransmission attempts
6588 * of the association.
6589 * Returns an error if the new association retransmission value is
6590 * greater than the sum of the retransmission value of the peer.
6591 * See [SCTP] for more information.
6594 static int sctp_getsockopt_associnfo(struct sock *sk, int len,
6595 char __user *optval,
6599 struct sctp_assocparams assocparams;
6600 struct sctp_association *asoc;
6601 struct list_head *pos;
6604 if (len < sizeof (struct sctp_assocparams))
6607 len = sizeof(struct sctp_assocparams);
6609 if (copy_from_user(&assocparams, optval, len))
6612 asoc = sctp_id2assoc(sk, assocparams.sasoc_assoc_id);
6614 if (!asoc && assocparams.sasoc_assoc_id != SCTP_FUTURE_ASSOC &&
6615 sctp_style(sk, UDP))
6618 /* Values correspoinding to the specific association */
6620 assocparams.sasoc_asocmaxrxt = asoc->max_retrans;
6621 assocparams.sasoc_peer_rwnd = asoc->peer.rwnd;
6622 assocparams.sasoc_local_rwnd = asoc->a_rwnd;
6623 assocparams.sasoc_cookie_life = ktime_to_ms(asoc->cookie_life);
6625 list_for_each(pos, &asoc->peer.transport_addr_list) {
6629 assocparams.sasoc_number_peer_destinations = cnt;
6631 /* Values corresponding to the endpoint */
6632 struct sctp_sock *sp = sctp_sk(sk);
6634 assocparams.sasoc_asocmaxrxt = sp->assocparams.sasoc_asocmaxrxt;
6635 assocparams.sasoc_peer_rwnd = sp->assocparams.sasoc_peer_rwnd;
6636 assocparams.sasoc_local_rwnd = sp->assocparams.sasoc_local_rwnd;
6637 assocparams.sasoc_cookie_life =
6638 sp->assocparams.sasoc_cookie_life;
6639 assocparams.sasoc_number_peer_destinations =
6641 sasoc_number_peer_destinations;
6644 if (put_user(len, optlen))
6647 if (copy_to_user(optval, &assocparams, len))
6654 * 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR)
6656 * This socket option is a boolean flag which turns on or off mapped V4
6657 * addresses. If this option is turned on and the socket is type
6658 * PF_INET6, then IPv4 addresses will be mapped to V6 representation.
6659 * If this option is turned off, then no mapping will be done of V4
6660 * addresses and a user will receive both PF_INET6 and PF_INET type
6661 * addresses on the socket.
6663 static int sctp_getsockopt_mappedv4(struct sock *sk, int len,
6664 char __user *optval, int __user *optlen)
6667 struct sctp_sock *sp = sctp_sk(sk);
6669 if (len < sizeof(int))
6674 if (put_user(len, optlen))
6676 if (copy_to_user(optval, &val, len))
6683 * 7.1.29. Set or Get the default context (SCTP_CONTEXT)
6684 * (chapter and verse is quoted at sctp_setsockopt_context())
6686 static int sctp_getsockopt_context(struct sock *sk, int len,
6687 char __user *optval, int __user *optlen)
6689 struct sctp_assoc_value params;
6690 struct sctp_association *asoc;
6692 if (len < sizeof(struct sctp_assoc_value))
6695 len = sizeof(struct sctp_assoc_value);
6697 if (copy_from_user(¶ms, optval, len))
6700 asoc = sctp_id2assoc(sk, params.assoc_id);
6701 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
6702 sctp_style(sk, UDP))
6705 params.assoc_value = asoc ? asoc->default_rcv_context
6706 : sctp_sk(sk)->default_rcv_context;
6708 if (put_user(len, optlen))
6710 if (copy_to_user(optval, ¶ms, len))
6717 * 8.1.16. Get or Set the Maximum Fragmentation Size (SCTP_MAXSEG)
6718 * This option will get or set the maximum size to put in any outgoing
6719 * SCTP DATA chunk. If a message is larger than this size it will be
6720 * fragmented by SCTP into the specified size. Note that the underlying
6721 * SCTP implementation may fragment into smaller sized chunks when the
6722 * PMTU of the underlying association is smaller than the value set by
6723 * the user. The default value for this option is '0' which indicates
6724 * the user is NOT limiting fragmentation and only the PMTU will effect
6725 * SCTP's choice of DATA chunk size. Note also that values set larger
6726 * than the maximum size of an IP datagram will effectively let SCTP
6727 * control fragmentation (i.e. the same as setting this option to 0).
6729 * The following structure is used to access and modify this parameter:
6731 * struct sctp_assoc_value {
6732 * sctp_assoc_t assoc_id;
6733 * uint32_t assoc_value;
6736 * assoc_id: This parameter is ignored for one-to-one style sockets.
6737 * For one-to-many style sockets this parameter indicates which
6738 * association the user is performing an action upon. Note that if
6739 * this field's value is zero then the endpoints default value is
6740 * changed (effecting future associations only).
6741 * assoc_value: This parameter specifies the maximum size in bytes.
6743 static int sctp_getsockopt_maxseg(struct sock *sk, int len,
6744 char __user *optval, int __user *optlen)
6746 struct sctp_assoc_value params;
6747 struct sctp_association *asoc;
6749 if (len == sizeof(int)) {
6750 pr_warn_ratelimited(DEPRECATED
6752 "Use of int in maxseg socket option.\n"
6753 "Use struct sctp_assoc_value instead\n",
6754 current->comm, task_pid_nr(current));
6755 params.assoc_id = SCTP_FUTURE_ASSOC;
6756 } else if (len >= sizeof(struct sctp_assoc_value)) {
6757 len = sizeof(struct sctp_assoc_value);
6758 if (copy_from_user(¶ms, optval, len))
6763 asoc = sctp_id2assoc(sk, params.assoc_id);
6764 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
6765 sctp_style(sk, UDP))
6769 params.assoc_value = asoc->frag_point;
6771 params.assoc_value = sctp_sk(sk)->user_frag;
6773 if (put_user(len, optlen))
6775 if (len == sizeof(int)) {
6776 if (copy_to_user(optval, ¶ms.assoc_value, len))
6779 if (copy_to_user(optval, ¶ms, len))
6787 * 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE)
6788 * (chapter and verse is quoted at sctp_setsockopt_fragment_interleave())
6790 static int sctp_getsockopt_fragment_interleave(struct sock *sk, int len,
6791 char __user *optval, int __user *optlen)
6795 if (len < sizeof(int))
6800 val = sctp_sk(sk)->frag_interleave;
6801 if (put_user(len, optlen))
6803 if (copy_to_user(optval, &val, len))
6810 * 7.1.25. Set or Get the sctp partial delivery point
6811 * (chapter and verse is quoted at sctp_setsockopt_partial_delivery_point())
6813 static int sctp_getsockopt_partial_delivery_point(struct sock *sk, int len,
6814 char __user *optval,
6819 if (len < sizeof(u32))
6824 val = sctp_sk(sk)->pd_point;
6825 if (put_user(len, optlen))
6827 if (copy_to_user(optval, &val, len))
6834 * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST)
6835 * (chapter and verse is quoted at sctp_setsockopt_maxburst())
6837 static int sctp_getsockopt_maxburst(struct sock *sk, int len,
6838 char __user *optval,
6841 struct sctp_assoc_value params;
6842 struct sctp_association *asoc;
6844 if (len == sizeof(int)) {
6845 pr_warn_ratelimited(DEPRECATED
6847 "Use of int in max_burst socket option.\n"
6848 "Use struct sctp_assoc_value instead\n",
6849 current->comm, task_pid_nr(current));
6850 params.assoc_id = SCTP_FUTURE_ASSOC;
6851 } else if (len >= sizeof(struct sctp_assoc_value)) {
6852 len = sizeof(struct sctp_assoc_value);
6853 if (copy_from_user(¶ms, optval, len))
6858 asoc = sctp_id2assoc(sk, params.assoc_id);
6859 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
6860 sctp_style(sk, UDP))
6863 params.assoc_value = asoc ? asoc->max_burst : sctp_sk(sk)->max_burst;
6865 if (len == sizeof(int)) {
6866 if (copy_to_user(optval, ¶ms.assoc_value, len))
6869 if (copy_to_user(optval, ¶ms, len))
6877 static int sctp_getsockopt_hmac_ident(struct sock *sk, int len,
6878 char __user *optval, int __user *optlen)
6880 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
6881 struct sctp_hmacalgo __user *p = (void __user *)optval;
6882 struct sctp_hmac_algo_param *hmacs;
6887 if (!ep->auth_enable)
6890 hmacs = ep->auth_hmacs_list;
6891 data_len = ntohs(hmacs->param_hdr.length) -
6892 sizeof(struct sctp_paramhdr);
6894 if (len < sizeof(struct sctp_hmacalgo) + data_len)
6897 len = sizeof(struct sctp_hmacalgo) + data_len;
6898 num_idents = data_len / sizeof(u16);
6900 if (put_user(len, optlen))
6902 if (put_user(num_idents, &p->shmac_num_idents))
6904 for (i = 0; i < num_idents; i++) {
6905 __u16 hmacid = ntohs(hmacs->hmac_ids[i]);
6907 if (copy_to_user(&p->shmac_idents[i], &hmacid, sizeof(__u16)))
6913 static int sctp_getsockopt_active_key(struct sock *sk, int len,
6914 char __user *optval, int __user *optlen)
6916 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
6917 struct sctp_authkeyid val;
6918 struct sctp_association *asoc;
6920 if (len < sizeof(struct sctp_authkeyid))
6923 len = sizeof(struct sctp_authkeyid);
6924 if (copy_from_user(&val, optval, len))
6927 asoc = sctp_id2assoc(sk, val.scact_assoc_id);
6928 if (!asoc && val.scact_assoc_id && sctp_style(sk, UDP))
6932 if (!asoc->peer.auth_capable)
6934 val.scact_keynumber = asoc->active_key_id;
6936 if (!ep->auth_enable)
6938 val.scact_keynumber = ep->active_key_id;
6941 if (put_user(len, optlen))
6943 if (copy_to_user(optval, &val, len))
6949 static int sctp_getsockopt_peer_auth_chunks(struct sock *sk, int len,
6950 char __user *optval, int __user *optlen)
6952 struct sctp_authchunks __user *p = (void __user *)optval;
6953 struct sctp_authchunks val;
6954 struct sctp_association *asoc;
6955 struct sctp_chunks_param *ch;
6959 if (len < sizeof(struct sctp_authchunks))
6962 if (copy_from_user(&val, optval, sizeof(val)))
6965 to = p->gauth_chunks;
6966 asoc = sctp_id2assoc(sk, val.gauth_assoc_id);
6970 if (!asoc->peer.auth_capable)
6973 ch = asoc->peer.peer_chunks;
6977 /* See if the user provided enough room for all the data */
6978 num_chunks = ntohs(ch->param_hdr.length) - sizeof(struct sctp_paramhdr);
6979 if (len < num_chunks)
6982 if (copy_to_user(to, ch->chunks, num_chunks))
6985 len = sizeof(struct sctp_authchunks) + num_chunks;
6986 if (put_user(len, optlen))
6988 if (put_user(num_chunks, &p->gauth_number_of_chunks))
6993 static int sctp_getsockopt_local_auth_chunks(struct sock *sk, int len,
6994 char __user *optval, int __user *optlen)
6996 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
6997 struct sctp_authchunks __user *p = (void __user *)optval;
6998 struct sctp_authchunks val;
6999 struct sctp_association *asoc;
7000 struct sctp_chunks_param *ch;
7004 if (len < sizeof(struct sctp_authchunks))
7007 if (copy_from_user(&val, optval, sizeof(val)))
7010 to = p->gauth_chunks;
7011 asoc = sctp_id2assoc(sk, val.gauth_assoc_id);
7012 if (!asoc && val.gauth_assoc_id != SCTP_FUTURE_ASSOC &&
7013 sctp_style(sk, UDP))
7017 if (!asoc->peer.auth_capable)
7019 ch = (struct sctp_chunks_param *)asoc->c.auth_chunks;
7021 if (!ep->auth_enable)
7023 ch = ep->auth_chunk_list;
7028 num_chunks = ntohs(ch->param_hdr.length) - sizeof(struct sctp_paramhdr);
7029 if (len < sizeof(struct sctp_authchunks) + num_chunks)
7032 if (copy_to_user(to, ch->chunks, num_chunks))
7035 len = sizeof(struct sctp_authchunks) + num_chunks;
7036 if (put_user(len, optlen))
7038 if (put_user(num_chunks, &p->gauth_number_of_chunks))
7045 * 8.2.5. Get the Current Number of Associations (SCTP_GET_ASSOC_NUMBER)
7046 * This option gets the current number of associations that are attached
7047 * to a one-to-many style socket. The option value is an uint32_t.
7049 static int sctp_getsockopt_assoc_number(struct sock *sk, int len,
7050 char __user *optval, int __user *optlen)
7052 struct sctp_sock *sp = sctp_sk(sk);
7053 struct sctp_association *asoc;
7056 if (sctp_style(sk, TCP))
7059 if (len < sizeof(u32))
7064 list_for_each_entry(asoc, &(sp->ep->asocs), asocs) {
7068 if (put_user(len, optlen))
7070 if (copy_to_user(optval, &val, len))
7077 * 8.1.23 SCTP_AUTO_ASCONF
7078 * See the corresponding setsockopt entry as description
7080 static int sctp_getsockopt_auto_asconf(struct sock *sk, int len,
7081 char __user *optval, int __user *optlen)
7085 if (len < sizeof(int))
7089 if (sctp_sk(sk)->do_auto_asconf && sctp_is_ep_boundall(sk))
7091 if (put_user(len, optlen))
7093 if (copy_to_user(optval, &val, len))
7099 * 8.2.6. Get the Current Identifiers of Associations
7100 * (SCTP_GET_ASSOC_ID_LIST)
7102 * This option gets the current list of SCTP association identifiers of
7103 * the SCTP associations handled by a one-to-many style socket.
7105 static int sctp_getsockopt_assoc_ids(struct sock *sk, int len,
7106 char __user *optval, int __user *optlen)
7108 struct sctp_sock *sp = sctp_sk(sk);
7109 struct sctp_association *asoc;
7110 struct sctp_assoc_ids *ids;
7113 if (sctp_style(sk, TCP))
7116 if (len < sizeof(struct sctp_assoc_ids))
7119 list_for_each_entry(asoc, &(sp->ep->asocs), asocs) {
7123 if (len < sizeof(struct sctp_assoc_ids) + sizeof(sctp_assoc_t) * num)
7126 len = sizeof(struct sctp_assoc_ids) + sizeof(sctp_assoc_t) * num;
7128 ids = kmalloc(len, GFP_USER | __GFP_NOWARN);
7132 ids->gaids_number_of_ids = num;
7134 list_for_each_entry(asoc, &(sp->ep->asocs), asocs) {
7135 ids->gaids_assoc_id[num++] = asoc->assoc_id;
7138 if (put_user(len, optlen) || copy_to_user(optval, ids, len)) {
7148 * SCTP_PEER_ADDR_THLDS
7150 * This option allows us to fetch the partially failed threshold for one or all
7151 * transports in an association. See Section 6.1 of:
7152 * http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txt
7154 static int sctp_getsockopt_paddr_thresholds(struct sock *sk,
7155 char __user *optval, int len,
7156 int __user *optlen, bool v2)
7158 struct sctp_paddrthlds_v2 val;
7159 struct sctp_transport *trans;
7160 struct sctp_association *asoc;
7163 min = v2 ? sizeof(val) : sizeof(struct sctp_paddrthlds);
7167 if (copy_from_user(&val, optval, len))
7170 if (!sctp_is_any(sk, (const union sctp_addr *)&val.spt_address)) {
7171 trans = sctp_addr_id2transport(sk, &val.spt_address,
7176 val.spt_pathmaxrxt = trans->pathmaxrxt;
7177 val.spt_pathpfthld = trans->pf_retrans;
7178 val.spt_pathcpthld = trans->ps_retrans;
7183 asoc = sctp_id2assoc(sk, val.spt_assoc_id);
7184 if (!asoc && val.spt_assoc_id != SCTP_FUTURE_ASSOC &&
7185 sctp_style(sk, UDP))
7189 val.spt_pathpfthld = asoc->pf_retrans;
7190 val.spt_pathmaxrxt = asoc->pathmaxrxt;
7191 val.spt_pathcpthld = asoc->ps_retrans;
7193 struct sctp_sock *sp = sctp_sk(sk);
7195 val.spt_pathpfthld = sp->pf_retrans;
7196 val.spt_pathmaxrxt = sp->pathmaxrxt;
7197 val.spt_pathcpthld = sp->ps_retrans;
7201 if (put_user(len, optlen) || copy_to_user(optval, &val, len))
7208 * SCTP_GET_ASSOC_STATS
7210 * This option retrieves local per endpoint statistics. It is modeled
7211 * after OpenSolaris' implementation
7213 static int sctp_getsockopt_assoc_stats(struct sock *sk, int len,
7214 char __user *optval,
7217 struct sctp_assoc_stats sas;
7218 struct sctp_association *asoc = NULL;
7220 /* User must provide at least the assoc id */
7221 if (len < sizeof(sctp_assoc_t))
7224 /* Allow the struct to grow and fill in as much as possible */
7225 len = min_t(size_t, len, sizeof(sas));
7227 if (copy_from_user(&sas, optval, len))
7230 asoc = sctp_id2assoc(sk, sas.sas_assoc_id);
7234 sas.sas_rtxchunks = asoc->stats.rtxchunks;
7235 sas.sas_gapcnt = asoc->stats.gapcnt;
7236 sas.sas_outofseqtsns = asoc->stats.outofseqtsns;
7237 sas.sas_osacks = asoc->stats.osacks;
7238 sas.sas_isacks = asoc->stats.isacks;
7239 sas.sas_octrlchunks = asoc->stats.octrlchunks;
7240 sas.sas_ictrlchunks = asoc->stats.ictrlchunks;
7241 sas.sas_oodchunks = asoc->stats.oodchunks;
7242 sas.sas_iodchunks = asoc->stats.iodchunks;
7243 sas.sas_ouodchunks = asoc->stats.ouodchunks;
7244 sas.sas_iuodchunks = asoc->stats.iuodchunks;
7245 sas.sas_idupchunks = asoc->stats.idupchunks;
7246 sas.sas_opackets = asoc->stats.opackets;
7247 sas.sas_ipackets = asoc->stats.ipackets;
7249 /* New high max rto observed, will return 0 if not a single
7250 * RTO update took place. obs_rto_ipaddr will be bogus
7253 sas.sas_maxrto = asoc->stats.max_obs_rto;
7254 memcpy(&sas.sas_obs_rto_ipaddr, &asoc->stats.obs_rto_ipaddr,
7255 sizeof(struct sockaddr_storage));
7257 /* Mark beginning of a new observation period */
7258 asoc->stats.max_obs_rto = asoc->rto_min;
7260 if (put_user(len, optlen))
7263 pr_debug("%s: len:%d, assoc_id:%d\n", __func__, len, sas.sas_assoc_id);
7265 if (copy_to_user(optval, &sas, len))
7271 static int sctp_getsockopt_recvrcvinfo(struct sock *sk, int len,
7272 char __user *optval,
7277 if (len < sizeof(int))
7281 if (sctp_sk(sk)->recvrcvinfo)
7283 if (put_user(len, optlen))
7285 if (copy_to_user(optval, &val, len))
7291 static int sctp_getsockopt_recvnxtinfo(struct sock *sk, int len,
7292 char __user *optval,
7297 if (len < sizeof(int))
7301 if (sctp_sk(sk)->recvnxtinfo)
7303 if (put_user(len, optlen))
7305 if (copy_to_user(optval, &val, len))
7311 static int sctp_getsockopt_pr_supported(struct sock *sk, int len,
7312 char __user *optval,
7315 struct sctp_assoc_value params;
7316 struct sctp_association *asoc;
7317 int retval = -EFAULT;
7319 if (len < sizeof(params)) {
7324 len = sizeof(params);
7325 if (copy_from_user(¶ms, optval, len))
7328 asoc = sctp_id2assoc(sk, params.assoc_id);
7329 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7330 sctp_style(sk, UDP)) {
7335 params.assoc_value = asoc ? asoc->peer.prsctp_capable
7336 : sctp_sk(sk)->ep->prsctp_enable;
7338 if (put_user(len, optlen))
7341 if (copy_to_user(optval, ¶ms, len))
7350 static int sctp_getsockopt_default_prinfo(struct sock *sk, int len,
7351 char __user *optval,
7354 struct sctp_default_prinfo info;
7355 struct sctp_association *asoc;
7356 int retval = -EFAULT;
7358 if (len < sizeof(info)) {
7364 if (copy_from_user(&info, optval, len))
7367 asoc = sctp_id2assoc(sk, info.pr_assoc_id);
7368 if (!asoc && info.pr_assoc_id != SCTP_FUTURE_ASSOC &&
7369 sctp_style(sk, UDP)) {
7375 info.pr_policy = SCTP_PR_POLICY(asoc->default_flags);
7376 info.pr_value = asoc->default_timetolive;
7378 struct sctp_sock *sp = sctp_sk(sk);
7380 info.pr_policy = SCTP_PR_POLICY(sp->default_flags);
7381 info.pr_value = sp->default_timetolive;
7384 if (put_user(len, optlen))
7387 if (copy_to_user(optval, &info, len))
7396 static int sctp_getsockopt_pr_assocstatus(struct sock *sk, int len,
7397 char __user *optval,
7400 struct sctp_prstatus params;
7401 struct sctp_association *asoc;
7403 int retval = -EINVAL;
7405 if (len < sizeof(params))
7408 len = sizeof(params);
7409 if (copy_from_user(¶ms, optval, len)) {
7414 policy = params.sprstat_policy;
7415 if (!policy || (policy & ~(SCTP_PR_SCTP_MASK | SCTP_PR_SCTP_ALL)) ||
7416 ((policy & SCTP_PR_SCTP_ALL) && (policy & SCTP_PR_SCTP_MASK)))
7419 asoc = sctp_id2assoc(sk, params.sprstat_assoc_id);
7423 if (policy == SCTP_PR_SCTP_ALL) {
7424 params.sprstat_abandoned_unsent = 0;
7425 params.sprstat_abandoned_sent = 0;
7426 for (policy = 0; policy <= SCTP_PR_INDEX(MAX); policy++) {
7427 params.sprstat_abandoned_unsent +=
7428 asoc->abandoned_unsent[policy];
7429 params.sprstat_abandoned_sent +=
7430 asoc->abandoned_sent[policy];
7433 params.sprstat_abandoned_unsent =
7434 asoc->abandoned_unsent[__SCTP_PR_INDEX(policy)];
7435 params.sprstat_abandoned_sent =
7436 asoc->abandoned_sent[__SCTP_PR_INDEX(policy)];
7439 if (put_user(len, optlen)) {
7444 if (copy_to_user(optval, ¶ms, len)) {
7455 static int sctp_getsockopt_pr_streamstatus(struct sock *sk, int len,
7456 char __user *optval,
7459 struct sctp_stream_out_ext *streamoute;
7460 struct sctp_association *asoc;
7461 struct sctp_prstatus params;
7462 int retval = -EINVAL;
7465 if (len < sizeof(params))
7468 len = sizeof(params);
7469 if (copy_from_user(¶ms, optval, len)) {
7474 policy = params.sprstat_policy;
7475 if (!policy || (policy & ~(SCTP_PR_SCTP_MASK | SCTP_PR_SCTP_ALL)) ||
7476 ((policy & SCTP_PR_SCTP_ALL) && (policy & SCTP_PR_SCTP_MASK)))
7479 asoc = sctp_id2assoc(sk, params.sprstat_assoc_id);
7480 if (!asoc || params.sprstat_sid >= asoc->stream.outcnt)
7483 streamoute = SCTP_SO(&asoc->stream, params.sprstat_sid)->ext;
7485 /* Not allocated yet, means all stats are 0 */
7486 params.sprstat_abandoned_unsent = 0;
7487 params.sprstat_abandoned_sent = 0;
7492 if (policy == SCTP_PR_SCTP_ALL) {
7493 params.sprstat_abandoned_unsent = 0;
7494 params.sprstat_abandoned_sent = 0;
7495 for (policy = 0; policy <= SCTP_PR_INDEX(MAX); policy++) {
7496 params.sprstat_abandoned_unsent +=
7497 streamoute->abandoned_unsent[policy];
7498 params.sprstat_abandoned_sent +=
7499 streamoute->abandoned_sent[policy];
7502 params.sprstat_abandoned_unsent =
7503 streamoute->abandoned_unsent[__SCTP_PR_INDEX(policy)];
7504 params.sprstat_abandoned_sent =
7505 streamoute->abandoned_sent[__SCTP_PR_INDEX(policy)];
7508 if (put_user(len, optlen) || copy_to_user(optval, ¶ms, len)) {
7519 static int sctp_getsockopt_reconfig_supported(struct sock *sk, int len,
7520 char __user *optval,
7523 struct sctp_assoc_value params;
7524 struct sctp_association *asoc;
7525 int retval = -EFAULT;
7527 if (len < sizeof(params)) {
7532 len = sizeof(params);
7533 if (copy_from_user(¶ms, optval, len))
7536 asoc = sctp_id2assoc(sk, params.assoc_id);
7537 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7538 sctp_style(sk, UDP)) {
7543 params.assoc_value = asoc ? asoc->peer.reconf_capable
7544 : sctp_sk(sk)->ep->reconf_enable;
7546 if (put_user(len, optlen))
7549 if (copy_to_user(optval, ¶ms, len))
7558 static int sctp_getsockopt_enable_strreset(struct sock *sk, int len,
7559 char __user *optval,
7562 struct sctp_assoc_value params;
7563 struct sctp_association *asoc;
7564 int retval = -EFAULT;
7566 if (len < sizeof(params)) {
7571 len = sizeof(params);
7572 if (copy_from_user(¶ms, optval, len))
7575 asoc = sctp_id2assoc(sk, params.assoc_id);
7576 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7577 sctp_style(sk, UDP)) {
7582 params.assoc_value = asoc ? asoc->strreset_enable
7583 : sctp_sk(sk)->ep->strreset_enable;
7585 if (put_user(len, optlen))
7588 if (copy_to_user(optval, ¶ms, len))
7597 static int sctp_getsockopt_scheduler(struct sock *sk, int len,
7598 char __user *optval,
7601 struct sctp_assoc_value params;
7602 struct sctp_association *asoc;
7603 int retval = -EFAULT;
7605 if (len < sizeof(params)) {
7610 len = sizeof(params);
7611 if (copy_from_user(¶ms, optval, len))
7614 asoc = sctp_id2assoc(sk, params.assoc_id);
7615 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7616 sctp_style(sk, UDP)) {
7621 params.assoc_value = asoc ? sctp_sched_get_sched(asoc)
7622 : sctp_sk(sk)->default_ss;
7624 if (put_user(len, optlen))
7627 if (copy_to_user(optval, ¶ms, len))
7636 static int sctp_getsockopt_scheduler_value(struct sock *sk, int len,
7637 char __user *optval,
7640 struct sctp_stream_value params;
7641 struct sctp_association *asoc;
7642 int retval = -EFAULT;
7644 if (len < sizeof(params)) {
7649 len = sizeof(params);
7650 if (copy_from_user(¶ms, optval, len))
7653 asoc = sctp_id2assoc(sk, params.assoc_id);
7659 retval = sctp_sched_get_value(asoc, params.stream_id,
7660 ¶ms.stream_value);
7664 if (put_user(len, optlen)) {
7669 if (copy_to_user(optval, ¶ms, len)) {
7678 static int sctp_getsockopt_interleaving_supported(struct sock *sk, int len,
7679 char __user *optval,
7682 struct sctp_assoc_value params;
7683 struct sctp_association *asoc;
7684 int retval = -EFAULT;
7686 if (len < sizeof(params)) {
7691 len = sizeof(params);
7692 if (copy_from_user(¶ms, optval, len))
7695 asoc = sctp_id2assoc(sk, params.assoc_id);
7696 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7697 sctp_style(sk, UDP)) {
7702 params.assoc_value = asoc ? asoc->peer.intl_capable
7703 : sctp_sk(sk)->ep->intl_enable;
7705 if (put_user(len, optlen))
7708 if (copy_to_user(optval, ¶ms, len))
7717 static int sctp_getsockopt_reuse_port(struct sock *sk, int len,
7718 char __user *optval,
7723 if (len < sizeof(int))
7727 val = sctp_sk(sk)->reuse;
7728 if (put_user(len, optlen))
7731 if (copy_to_user(optval, &val, len))
7737 static int sctp_getsockopt_event(struct sock *sk, int len, char __user *optval,
7740 struct sctp_association *asoc;
7741 struct sctp_event param;
7744 if (len < sizeof(param))
7747 len = sizeof(param);
7748 if (copy_from_user(¶m, optval, len))
7751 if (param.se_type < SCTP_SN_TYPE_BASE ||
7752 param.se_type > SCTP_SN_TYPE_MAX)
7755 asoc = sctp_id2assoc(sk, param.se_assoc_id);
7756 if (!asoc && param.se_assoc_id != SCTP_FUTURE_ASSOC &&
7757 sctp_style(sk, UDP))
7760 subscribe = asoc ? asoc->subscribe : sctp_sk(sk)->subscribe;
7761 param.se_on = sctp_ulpevent_type_enabled(subscribe, param.se_type);
7763 if (put_user(len, optlen))
7766 if (copy_to_user(optval, ¶m, len))
7772 static int sctp_getsockopt_asconf_supported(struct sock *sk, int len,
7773 char __user *optval,
7776 struct sctp_assoc_value params;
7777 struct sctp_association *asoc;
7778 int retval = -EFAULT;
7780 if (len < sizeof(params)) {
7785 len = sizeof(params);
7786 if (copy_from_user(¶ms, optval, len))
7789 asoc = sctp_id2assoc(sk, params.assoc_id);
7790 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7791 sctp_style(sk, UDP)) {
7796 params.assoc_value = asoc ? asoc->peer.asconf_capable
7797 : sctp_sk(sk)->ep->asconf_enable;
7799 if (put_user(len, optlen))
7802 if (copy_to_user(optval, ¶ms, len))
7811 static int sctp_getsockopt_auth_supported(struct sock *sk, int len,
7812 char __user *optval,
7815 struct sctp_assoc_value params;
7816 struct sctp_association *asoc;
7817 int retval = -EFAULT;
7819 if (len < sizeof(params)) {
7824 len = sizeof(params);
7825 if (copy_from_user(¶ms, optval, len))
7828 asoc = sctp_id2assoc(sk, params.assoc_id);
7829 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7830 sctp_style(sk, UDP)) {
7835 params.assoc_value = asoc ? asoc->peer.auth_capable
7836 : sctp_sk(sk)->ep->auth_enable;
7838 if (put_user(len, optlen))
7841 if (copy_to_user(optval, ¶ms, len))
7850 static int sctp_getsockopt_ecn_supported(struct sock *sk, int len,
7851 char __user *optval,
7854 struct sctp_assoc_value params;
7855 struct sctp_association *asoc;
7856 int retval = -EFAULT;
7858 if (len < sizeof(params)) {
7863 len = sizeof(params);
7864 if (copy_from_user(¶ms, optval, len))
7867 asoc = sctp_id2assoc(sk, params.assoc_id);
7868 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7869 sctp_style(sk, UDP)) {
7874 params.assoc_value = asoc ? asoc->peer.ecn_capable
7875 : sctp_sk(sk)->ep->ecn_enable;
7877 if (put_user(len, optlen))
7880 if (copy_to_user(optval, ¶ms, len))
7889 static int sctp_getsockopt_pf_expose(struct sock *sk, int len,
7890 char __user *optval,
7893 struct sctp_assoc_value params;
7894 struct sctp_association *asoc;
7895 int retval = -EFAULT;
7897 if (len < sizeof(params)) {
7902 len = sizeof(params);
7903 if (copy_from_user(¶ms, optval, len))
7906 asoc = sctp_id2assoc(sk, params.assoc_id);
7907 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7908 sctp_style(sk, UDP)) {
7913 params.assoc_value = asoc ? asoc->pf_expose
7914 : sctp_sk(sk)->pf_expose;
7916 if (put_user(len, optlen))
7919 if (copy_to_user(optval, ¶ms, len))
7928 static int sctp_getsockopt_encap_port(struct sock *sk, int len,
7929 char __user *optval, int __user *optlen)
7931 struct sctp_association *asoc;
7932 struct sctp_udpencaps encap;
7933 struct sctp_transport *t;
7936 if (len < sizeof(encap))
7939 len = sizeof(encap);
7940 if (copy_from_user(&encap, optval, len))
7943 /* If an address other than INADDR_ANY is specified, and
7944 * no transport is found, then the request is invalid.
7946 if (!sctp_is_any(sk, (union sctp_addr *)&encap.sue_address)) {
7947 t = sctp_addr_id2transport(sk, &encap.sue_address,
7948 encap.sue_assoc_id);
7950 pr_debug("%s: failed no transport\n", __func__);
7954 encap_port = t->encap_port;
7958 /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
7959 * socket is a one to many style socket, and an association
7960 * was not found, then the id was invalid.
7962 asoc = sctp_id2assoc(sk, encap.sue_assoc_id);
7963 if (!asoc && encap.sue_assoc_id != SCTP_FUTURE_ASSOC &&
7964 sctp_style(sk, UDP)) {
7965 pr_debug("%s: failed no association\n", __func__);
7970 encap_port = asoc->encap_port;
7974 encap_port = sctp_sk(sk)->encap_port;
7977 encap.sue_port = (__force uint16_t)encap_port;
7978 if (copy_to_user(optval, &encap, len))
7981 if (put_user(len, optlen))
7987 static int sctp_getsockopt_probe_interval(struct sock *sk, int len,
7988 char __user *optval,
7991 struct sctp_probeinterval params;
7992 struct sctp_association *asoc;
7993 struct sctp_transport *t;
7994 __u32 probe_interval;
7996 if (len < sizeof(params))
7999 len = sizeof(params);
8000 if (copy_from_user(¶ms, optval, len))
8003 /* If an address other than INADDR_ANY is specified, and
8004 * no transport is found, then the request is invalid.
8006 if (!sctp_is_any(sk, (union sctp_addr *)¶ms.spi_address)) {
8007 t = sctp_addr_id2transport(sk, ¶ms.spi_address,
8008 params.spi_assoc_id);
8010 pr_debug("%s: failed no transport\n", __func__);
8014 probe_interval = jiffies_to_msecs(t->probe_interval);
8018 /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
8019 * socket is a one to many style socket, and an association
8020 * was not found, then the id was invalid.
8022 asoc = sctp_id2assoc(sk, params.spi_assoc_id);
8023 if (!asoc && params.spi_assoc_id != SCTP_FUTURE_ASSOC &&
8024 sctp_style(sk, UDP)) {
8025 pr_debug("%s: failed no association\n", __func__);
8030 probe_interval = jiffies_to_msecs(asoc->probe_interval);
8034 probe_interval = sctp_sk(sk)->probe_interval;
8037 params.spi_interval = probe_interval;
8038 if (copy_to_user(optval, ¶ms, len))
8041 if (put_user(len, optlen))
8047 static int sctp_getsockopt(struct sock *sk, int level, int optname,
8048 char __user *optval, int __user *optlen)
8053 pr_debug("%s: sk:%p, optname:%d\n", __func__, sk, optname);
8055 /* I can hardly begin to describe how wrong this is. This is
8056 * so broken as to be worse than useless. The API draft
8057 * REALLY is NOT helpful here... I am not convinced that the
8058 * semantics of getsockopt() with a level OTHER THAN SOL_SCTP
8059 * are at all well-founded.
8061 if (level != SOL_SCTP) {
8062 struct sctp_af *af = sctp_sk(sk)->pf->af;
8064 retval = af->getsockopt(sk, level, optname, optval, optlen);
8068 if (get_user(len, optlen))
8078 retval = sctp_getsockopt_sctp_status(sk, len, optval, optlen);
8080 case SCTP_DISABLE_FRAGMENTS:
8081 retval = sctp_getsockopt_disable_fragments(sk, len, optval,
8085 retval = sctp_getsockopt_events(sk, len, optval, optlen);
8087 case SCTP_AUTOCLOSE:
8088 retval = sctp_getsockopt_autoclose(sk, len, optval, optlen);
8090 case SCTP_SOCKOPT_PEELOFF:
8091 retval = sctp_getsockopt_peeloff(sk, len, optval, optlen);
8093 case SCTP_SOCKOPT_PEELOFF_FLAGS:
8094 retval = sctp_getsockopt_peeloff_flags(sk, len, optval, optlen);
8096 case SCTP_PEER_ADDR_PARAMS:
8097 retval = sctp_getsockopt_peer_addr_params(sk, len, optval,
8100 case SCTP_DELAYED_SACK:
8101 retval = sctp_getsockopt_delayed_ack(sk, len, optval,
8105 retval = sctp_getsockopt_initmsg(sk, len, optval, optlen);
8107 case SCTP_GET_PEER_ADDRS:
8108 retval = sctp_getsockopt_peer_addrs(sk, len, optval,
8111 case SCTP_GET_LOCAL_ADDRS:
8112 retval = sctp_getsockopt_local_addrs(sk, len, optval,
8115 case SCTP_SOCKOPT_CONNECTX3:
8116 retval = sctp_getsockopt_connectx3(sk, len, optval, optlen);
8118 case SCTP_DEFAULT_SEND_PARAM:
8119 retval = sctp_getsockopt_default_send_param(sk, len,
8122 case SCTP_DEFAULT_SNDINFO:
8123 retval = sctp_getsockopt_default_sndinfo(sk, len,
8126 case SCTP_PRIMARY_ADDR:
8127 retval = sctp_getsockopt_primary_addr(sk, len, optval, optlen);
8130 retval = sctp_getsockopt_nodelay(sk, len, optval, optlen);
8133 retval = sctp_getsockopt_rtoinfo(sk, len, optval, optlen);
8135 case SCTP_ASSOCINFO:
8136 retval = sctp_getsockopt_associnfo(sk, len, optval, optlen);
8138 case SCTP_I_WANT_MAPPED_V4_ADDR:
8139 retval = sctp_getsockopt_mappedv4(sk, len, optval, optlen);
8142 retval = sctp_getsockopt_maxseg(sk, len, optval, optlen);
8144 case SCTP_GET_PEER_ADDR_INFO:
8145 retval = sctp_getsockopt_peer_addr_info(sk, len, optval,
8148 case SCTP_ADAPTATION_LAYER:
8149 retval = sctp_getsockopt_adaptation_layer(sk, len, optval,
8153 retval = sctp_getsockopt_context(sk, len, optval, optlen);
8155 case SCTP_FRAGMENT_INTERLEAVE:
8156 retval = sctp_getsockopt_fragment_interleave(sk, len, optval,
8159 case SCTP_PARTIAL_DELIVERY_POINT:
8160 retval = sctp_getsockopt_partial_delivery_point(sk, len, optval,
8163 case SCTP_MAX_BURST:
8164 retval = sctp_getsockopt_maxburst(sk, len, optval, optlen);
8167 case SCTP_AUTH_CHUNK:
8168 case SCTP_AUTH_DELETE_KEY:
8169 case SCTP_AUTH_DEACTIVATE_KEY:
8170 retval = -EOPNOTSUPP;
8172 case SCTP_HMAC_IDENT:
8173 retval = sctp_getsockopt_hmac_ident(sk, len, optval, optlen);
8175 case SCTP_AUTH_ACTIVE_KEY:
8176 retval = sctp_getsockopt_active_key(sk, len, optval, optlen);
8178 case SCTP_PEER_AUTH_CHUNKS:
8179 retval = sctp_getsockopt_peer_auth_chunks(sk, len, optval,
8182 case SCTP_LOCAL_AUTH_CHUNKS:
8183 retval = sctp_getsockopt_local_auth_chunks(sk, len, optval,
8186 case SCTP_GET_ASSOC_NUMBER:
8187 retval = sctp_getsockopt_assoc_number(sk, len, optval, optlen);
8189 case SCTP_GET_ASSOC_ID_LIST:
8190 retval = sctp_getsockopt_assoc_ids(sk, len, optval, optlen);
8192 case SCTP_AUTO_ASCONF:
8193 retval = sctp_getsockopt_auto_asconf(sk, len, optval, optlen);
8195 case SCTP_PEER_ADDR_THLDS:
8196 retval = sctp_getsockopt_paddr_thresholds(sk, optval, len,
8199 case SCTP_PEER_ADDR_THLDS_V2:
8200 retval = sctp_getsockopt_paddr_thresholds(sk, optval, len,
8203 case SCTP_GET_ASSOC_STATS:
8204 retval = sctp_getsockopt_assoc_stats(sk, len, optval, optlen);
8206 case SCTP_RECVRCVINFO:
8207 retval = sctp_getsockopt_recvrcvinfo(sk, len, optval, optlen);
8209 case SCTP_RECVNXTINFO:
8210 retval = sctp_getsockopt_recvnxtinfo(sk, len, optval, optlen);
8212 case SCTP_PR_SUPPORTED:
8213 retval = sctp_getsockopt_pr_supported(sk, len, optval, optlen);
8215 case SCTP_DEFAULT_PRINFO:
8216 retval = sctp_getsockopt_default_prinfo(sk, len, optval,
8219 case SCTP_PR_ASSOC_STATUS:
8220 retval = sctp_getsockopt_pr_assocstatus(sk, len, optval,
8223 case SCTP_PR_STREAM_STATUS:
8224 retval = sctp_getsockopt_pr_streamstatus(sk, len, optval,
8227 case SCTP_RECONFIG_SUPPORTED:
8228 retval = sctp_getsockopt_reconfig_supported(sk, len, optval,
8231 case SCTP_ENABLE_STREAM_RESET:
8232 retval = sctp_getsockopt_enable_strreset(sk, len, optval,
8235 case SCTP_STREAM_SCHEDULER:
8236 retval = sctp_getsockopt_scheduler(sk, len, optval,
8239 case SCTP_STREAM_SCHEDULER_VALUE:
8240 retval = sctp_getsockopt_scheduler_value(sk, len, optval,
8243 case SCTP_INTERLEAVING_SUPPORTED:
8244 retval = sctp_getsockopt_interleaving_supported(sk, len, optval,
8247 case SCTP_REUSE_PORT:
8248 retval = sctp_getsockopt_reuse_port(sk, len, optval, optlen);
8251 retval = sctp_getsockopt_event(sk, len, optval, optlen);
8253 case SCTP_ASCONF_SUPPORTED:
8254 retval = sctp_getsockopt_asconf_supported(sk, len, optval,
8257 case SCTP_AUTH_SUPPORTED:
8258 retval = sctp_getsockopt_auth_supported(sk, len, optval,
8261 case SCTP_ECN_SUPPORTED:
8262 retval = sctp_getsockopt_ecn_supported(sk, len, optval, optlen);
8264 case SCTP_EXPOSE_POTENTIALLY_FAILED_STATE:
8265 retval = sctp_getsockopt_pf_expose(sk, len, optval, optlen);
8267 case SCTP_REMOTE_UDP_ENCAPS_PORT:
8268 retval = sctp_getsockopt_encap_port(sk, len, optval, optlen);
8270 case SCTP_PLPMTUD_PROBE_INTERVAL:
8271 retval = sctp_getsockopt_probe_interval(sk, len, optval, optlen);
8274 retval = -ENOPROTOOPT;
8282 static int sctp_hash(struct sock *sk)
8288 static void sctp_unhash(struct sock *sk)
8293 /* Check if port is acceptable. Possibly find first available port.
8295 * The port hash table (contained in the 'global' SCTP protocol storage
8296 * returned by struct sctp_protocol *sctp_get_protocol()). The hash
8297 * table is an array of 4096 lists (sctp_bind_hashbucket). Each
8298 * list (the list number is the port number hashed out, so as you
8299 * would expect from a hash function, all the ports in a given list have
8300 * such a number that hashes out to the same list number; you were
8301 * expecting that, right?); so each list has a set of ports, with a
8302 * link to the socket (struct sock) that uses it, the port number and
8303 * a fastreuse flag (FIXME: NPI ipg).
8305 static struct sctp_bind_bucket *sctp_bucket_create(
8306 struct sctp_bind_hashbucket *head, struct net *, unsigned short snum);
8308 static int sctp_get_port_local(struct sock *sk, union sctp_addr *addr)
8310 struct sctp_sock *sp = sctp_sk(sk);
8311 bool reuse = (sk->sk_reuse || sp->reuse);
8312 struct sctp_bind_hashbucket *head; /* hash list */
8313 struct net *net = sock_net(sk);
8314 kuid_t uid = sock_i_uid(sk);
8315 struct sctp_bind_bucket *pp;
8316 unsigned short snum;
8319 snum = ntohs(addr->v4.sin_port);
8321 pr_debug("%s: begins, snum:%d\n", __func__, snum);
8324 /* Search for an available port. */
8325 int low, high, remaining, index;
8328 inet_get_local_port_range(net, &low, &high);
8329 remaining = (high - low) + 1;
8330 rover = prandom_u32() % remaining + low;
8334 if ((rover < low) || (rover > high))
8336 if (inet_is_local_reserved_port(net, rover))
8338 index = sctp_phashfn(net, rover);
8339 head = &sctp_port_hashtable[index];
8340 spin_lock_bh(&head->lock);
8341 sctp_for_each_hentry(pp, &head->chain)
8342 if ((pp->port == rover) &&
8343 net_eq(net, pp->net))
8347 spin_unlock_bh(&head->lock);
8349 } while (--remaining > 0);
8351 /* Exhausted local port range during search? */
8356 /* OK, here is the one we will use. HEAD (the port
8357 * hash table list entry) is non-NULL and we hold it's
8362 /* We are given an specific port number; we verify
8363 * that it is not being used. If it is used, we will
8364 * exahust the search in the hash list corresponding
8365 * to the port number (snum) - we detect that with the
8366 * port iterator, pp being NULL.
8368 head = &sctp_port_hashtable[sctp_phashfn(net, snum)];
8369 spin_lock_bh(&head->lock);
8370 sctp_for_each_hentry(pp, &head->chain) {
8371 if ((pp->port == snum) && net_eq(pp->net, net))
8378 if (!hlist_empty(&pp->owner)) {
8379 /* We had a port hash table hit - there is an
8380 * available port (pp != NULL) and it is being
8381 * used by other socket (pp->owner not empty); that other
8382 * socket is going to be sk2.
8386 pr_debug("%s: found a possible match\n", __func__);
8388 if ((pp->fastreuse && reuse &&
8389 sk->sk_state != SCTP_SS_LISTENING) ||
8390 (pp->fastreuseport && sk->sk_reuseport &&
8391 uid_eq(pp->fastuid, uid)))
8394 /* Run through the list of sockets bound to the port
8395 * (pp->port) [via the pointers bind_next and
8396 * bind_pprev in the struct sock *sk2 (pp->sk)]. On each one,
8397 * we get the endpoint they describe and run through
8398 * the endpoint's list of IP (v4 or v6) addresses,
8399 * comparing each of the addresses with the address of
8400 * the socket sk. If we find a match, then that means
8401 * that this port/socket (sk) combination are already
8404 sk_for_each_bound(sk2, &pp->owner) {
8405 struct sctp_sock *sp2 = sctp_sk(sk2);
8406 struct sctp_endpoint *ep2 = sp2->ep;
8409 (reuse && (sk2->sk_reuse || sp2->reuse) &&
8410 sk2->sk_state != SCTP_SS_LISTENING) ||
8411 (sk->sk_reuseport && sk2->sk_reuseport &&
8412 uid_eq(uid, sock_i_uid(sk2))))
8415 if (sctp_bind_addr_conflict(&ep2->base.bind_addr,
8422 pr_debug("%s: found a match\n", __func__);
8425 /* If there was a hash table miss, create a new port. */
8427 if (!pp && !(pp = sctp_bucket_create(head, net, snum)))
8430 /* In either case (hit or miss), make sure fastreuse is 1 only
8431 * if sk->sk_reuse is too (that is, if the caller requested
8432 * SO_REUSEADDR on this socket -sk-).
8434 if (hlist_empty(&pp->owner)) {
8435 if (reuse && sk->sk_state != SCTP_SS_LISTENING)
8440 if (sk->sk_reuseport) {
8441 pp->fastreuseport = 1;
8444 pp->fastreuseport = 0;
8447 if (pp->fastreuse &&
8448 (!reuse || sk->sk_state == SCTP_SS_LISTENING))
8451 if (pp->fastreuseport &&
8452 (!sk->sk_reuseport || !uid_eq(pp->fastuid, uid)))
8453 pp->fastreuseport = 0;
8456 /* We are set, so fill up all the data in the hash table
8457 * entry, tie the socket list information with the rest of the
8458 * sockets FIXME: Blurry, NPI (ipg).
8461 if (!sp->bind_hash) {
8462 inet_sk(sk)->inet_num = snum;
8463 sk_add_bind_node(sk, &pp->owner);
8469 spin_unlock_bh(&head->lock);
8473 /* Assign a 'snum' port to the socket. If snum == 0, an ephemeral
8474 * port is requested.
8476 static int sctp_get_port(struct sock *sk, unsigned short snum)
8478 union sctp_addr addr;
8479 struct sctp_af *af = sctp_sk(sk)->pf->af;
8481 /* Set up a dummy address struct from the sk. */
8482 af->from_sk(&addr, sk);
8483 addr.v4.sin_port = htons(snum);
8485 /* Note: sk->sk_num gets filled in if ephemeral port request. */
8486 return sctp_get_port_local(sk, &addr);
8490 * Move a socket to LISTENING state.
8492 static int sctp_listen_start(struct sock *sk, int backlog)
8494 struct sctp_sock *sp = sctp_sk(sk);
8495 struct sctp_endpoint *ep = sp->ep;
8496 struct crypto_shash *tfm = NULL;
8499 /* Allocate HMAC for generating cookie. */
8500 if (!sp->hmac && sp->sctp_hmac_alg) {
8501 sprintf(alg, "hmac(%s)", sp->sctp_hmac_alg);
8502 tfm = crypto_alloc_shash(alg, 0, 0);
8504 net_info_ratelimited("failed to load transform for %s: %ld\n",
8505 sp->sctp_hmac_alg, PTR_ERR(tfm));
8508 sctp_sk(sk)->hmac = tfm;
8512 * If a bind() or sctp_bindx() is not called prior to a listen()
8513 * call that allows new associations to be accepted, the system
8514 * picks an ephemeral port and will choose an address set equivalent
8515 * to binding with a wildcard address.
8517 * This is not currently spelled out in the SCTP sockets
8518 * extensions draft, but follows the practice as seen in TCP
8522 inet_sk_set_state(sk, SCTP_SS_LISTENING);
8523 if (!ep->base.bind_addr.port) {
8524 if (sctp_autobind(sk))
8527 if (sctp_get_port(sk, inet_sk(sk)->inet_num)) {
8528 inet_sk_set_state(sk, SCTP_SS_CLOSED);
8533 WRITE_ONCE(sk->sk_max_ack_backlog, backlog);
8534 return sctp_hash_endpoint(ep);
8538 * 4.1.3 / 5.1.3 listen()
8540 * By default, new associations are not accepted for UDP style sockets.
8541 * An application uses listen() to mark a socket as being able to
8542 * accept new associations.
8544 * On TCP style sockets, applications use listen() to ready the SCTP
8545 * endpoint for accepting inbound associations.
8547 * On both types of endpoints a backlog of '0' disables listening.
8549 * Move a socket to LISTENING state.
8551 int sctp_inet_listen(struct socket *sock, int backlog)
8553 struct sock *sk = sock->sk;
8554 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
8557 if (unlikely(backlog < 0))
8562 /* Peeled-off sockets are not allowed to listen(). */
8563 if (sctp_style(sk, UDP_HIGH_BANDWIDTH))
8566 if (sock->state != SS_UNCONNECTED)
8569 if (!sctp_sstate(sk, LISTENING) && !sctp_sstate(sk, CLOSED))
8572 /* If backlog is zero, disable listening. */
8574 if (sctp_sstate(sk, CLOSED))
8578 sctp_unhash_endpoint(ep);
8579 sk->sk_state = SCTP_SS_CLOSED;
8580 if (sk->sk_reuse || sctp_sk(sk)->reuse)
8581 sctp_sk(sk)->bind_hash->fastreuse = 1;
8585 /* If we are already listening, just update the backlog */
8586 if (sctp_sstate(sk, LISTENING))
8587 WRITE_ONCE(sk->sk_max_ack_backlog, backlog);
8589 err = sctp_listen_start(sk, backlog);
8601 * This function is done by modeling the current datagram_poll() and the
8602 * tcp_poll(). Note that, based on these implementations, we don't
8603 * lock the socket in this function, even though it seems that,
8604 * ideally, locking or some other mechanisms can be used to ensure
8605 * the integrity of the counters (sndbuf and wmem_alloc) used
8606 * in this place. We assume that we don't need locks either until proven
8609 * Another thing to note is that we include the Async I/O support
8610 * here, again, by modeling the current TCP/UDP code. We don't have
8611 * a good way to test with it yet.
8613 __poll_t sctp_poll(struct file *file, struct socket *sock, poll_table *wait)
8615 struct sock *sk = sock->sk;
8616 struct sctp_sock *sp = sctp_sk(sk);
8619 poll_wait(file, sk_sleep(sk), wait);
8621 sock_rps_record_flow(sk);
8623 /* A TCP-style listening socket becomes readable when the accept queue
8626 if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))
8627 return (!list_empty(&sp->ep->asocs)) ?
8628 (EPOLLIN | EPOLLRDNORM) : 0;
8632 /* Is there any exceptional events? */
8633 if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue))
8635 (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? EPOLLPRI : 0);
8636 if (sk->sk_shutdown & RCV_SHUTDOWN)
8637 mask |= EPOLLRDHUP | EPOLLIN | EPOLLRDNORM;
8638 if (sk->sk_shutdown == SHUTDOWN_MASK)
8641 /* Is it readable? Reconsider this code with TCP-style support. */
8642 if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
8643 mask |= EPOLLIN | EPOLLRDNORM;
8645 /* The association is either gone or not ready. */
8646 if (!sctp_style(sk, UDP) && sctp_sstate(sk, CLOSED))
8649 /* Is it writable? */
8650 if (sctp_writeable(sk)) {
8651 mask |= EPOLLOUT | EPOLLWRNORM;
8653 sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk);
8655 * Since the socket is not locked, the buffer
8656 * might be made available after the writeable check and
8657 * before the bit is set. This could cause a lost I/O
8658 * signal. tcp_poll() has a race breaker for this race
8659 * condition. Based on their implementation, we put
8660 * in the following code to cover it as well.
8662 if (sctp_writeable(sk))
8663 mask |= EPOLLOUT | EPOLLWRNORM;
8668 /********************************************************************
8669 * 2nd Level Abstractions
8670 ********************************************************************/
8672 static struct sctp_bind_bucket *sctp_bucket_create(
8673 struct sctp_bind_hashbucket *head, struct net *net, unsigned short snum)
8675 struct sctp_bind_bucket *pp;
8677 pp = kmem_cache_alloc(sctp_bucket_cachep, GFP_ATOMIC);
8679 SCTP_DBG_OBJCNT_INC(bind_bucket);
8682 INIT_HLIST_HEAD(&pp->owner);
8684 hlist_add_head(&pp->node, &head->chain);
8689 /* Caller must hold hashbucket lock for this tb with local BH disabled */
8690 static void sctp_bucket_destroy(struct sctp_bind_bucket *pp)
8692 if (pp && hlist_empty(&pp->owner)) {
8693 __hlist_del(&pp->node);
8694 kmem_cache_free(sctp_bucket_cachep, pp);
8695 SCTP_DBG_OBJCNT_DEC(bind_bucket);
8699 /* Release this socket's reference to a local port. */
8700 static inline void __sctp_put_port(struct sock *sk)
8702 struct sctp_bind_hashbucket *head =
8703 &sctp_port_hashtable[sctp_phashfn(sock_net(sk),
8704 inet_sk(sk)->inet_num)];
8705 struct sctp_bind_bucket *pp;
8707 spin_lock(&head->lock);
8708 pp = sctp_sk(sk)->bind_hash;
8709 __sk_del_bind_node(sk);
8710 sctp_sk(sk)->bind_hash = NULL;
8711 inet_sk(sk)->inet_num = 0;
8712 sctp_bucket_destroy(pp);
8713 spin_unlock(&head->lock);
8716 void sctp_put_port(struct sock *sk)
8719 __sctp_put_port(sk);
8724 * The system picks an ephemeral port and choose an address set equivalent
8725 * to binding with a wildcard address.
8726 * One of those addresses will be the primary address for the association.
8727 * This automatically enables the multihoming capability of SCTP.
8729 static int sctp_autobind(struct sock *sk)
8731 union sctp_addr autoaddr;
8735 /* Initialize a local sockaddr structure to INADDR_ANY. */
8736 af = sctp_sk(sk)->pf->af;
8738 port = htons(inet_sk(sk)->inet_num);
8739 af->inaddr_any(&autoaddr, port);
8741 return sctp_do_bind(sk, &autoaddr, af->sockaddr_len);
8744 /* Parse out IPPROTO_SCTP CMSG headers. Perform only minimal validation.
8747 * 4.2 The cmsghdr Structure *
8749 * When ancillary data is sent or received, any number of ancillary data
8750 * objects can be specified by the msg_control and msg_controllen members of
8751 * the msghdr structure, because each object is preceded by
8752 * a cmsghdr structure defining the object's length (the cmsg_len member).
8753 * Historically Berkeley-derived implementations have passed only one object
8754 * at a time, but this API allows multiple objects to be
8755 * passed in a single call to sendmsg() or recvmsg(). The following example
8756 * shows two ancillary data objects in a control buffer.
8758 * |<--------------------------- msg_controllen -------------------------->|
8761 * |<----- ancillary data object ----->|<----- ancillary data object ----->|
8763 * |<---------- CMSG_SPACE() --------->|<---------- CMSG_SPACE() --------->|
8766 * |<---------- cmsg_len ---------->| |<--------- cmsg_len ----------->| |
8768 * |<--------- CMSG_LEN() --------->| |<-------- CMSG_LEN() ---------->| |
8771 * +-----+-----+-----+--+-----------+--+-----+-----+-----+--+-----------+--+
8772 * |cmsg_|cmsg_|cmsg_|XX| |XX|cmsg_|cmsg_|cmsg_|XX| |XX|
8774 * |len |level|type |XX|cmsg_data[]|XX|len |level|type |XX|cmsg_data[]|XX|
8776 * +-----+-----+-----+--+-----------+--+-----+-----+-----+--+-----------+--+
8783 static int sctp_msghdr_parse(const struct msghdr *msg, struct sctp_cmsgs *cmsgs)
8785 struct msghdr *my_msg = (struct msghdr *)msg;
8786 struct cmsghdr *cmsg;
8788 for_each_cmsghdr(cmsg, my_msg) {
8789 if (!CMSG_OK(my_msg, cmsg))
8792 /* Should we parse this header or ignore? */
8793 if (cmsg->cmsg_level != IPPROTO_SCTP)
8796 /* Strictly check lengths following example in SCM code. */
8797 switch (cmsg->cmsg_type) {
8799 /* SCTP Socket API Extension
8800 * 5.3.1 SCTP Initiation Structure (SCTP_INIT)
8802 * This cmsghdr structure provides information for
8803 * initializing new SCTP associations with sendmsg().
8804 * The SCTP_INITMSG socket option uses this same data
8805 * structure. This structure is not used for
8808 * cmsg_level cmsg_type cmsg_data[]
8809 * ------------ ------------ ----------------------
8810 * IPPROTO_SCTP SCTP_INIT struct sctp_initmsg
8812 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_initmsg)))
8815 cmsgs->init = CMSG_DATA(cmsg);
8819 /* SCTP Socket API Extension
8820 * 5.3.2 SCTP Header Information Structure(SCTP_SNDRCV)
8822 * This cmsghdr structure specifies SCTP options for
8823 * sendmsg() and describes SCTP header information
8824 * about a received message through recvmsg().
8826 * cmsg_level cmsg_type cmsg_data[]
8827 * ------------ ------------ ----------------------
8828 * IPPROTO_SCTP SCTP_SNDRCV struct sctp_sndrcvinfo
8830 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_sndrcvinfo)))
8833 cmsgs->srinfo = CMSG_DATA(cmsg);
8835 if (cmsgs->srinfo->sinfo_flags &
8836 ~(SCTP_UNORDERED | SCTP_ADDR_OVER |
8837 SCTP_SACK_IMMEDIATELY | SCTP_SENDALL |
8838 SCTP_PR_SCTP_MASK | SCTP_ABORT | SCTP_EOF))
8843 /* SCTP Socket API Extension
8844 * 5.3.4 SCTP Send Information Structure (SCTP_SNDINFO)
8846 * This cmsghdr structure specifies SCTP options for
8847 * sendmsg(). This structure and SCTP_RCVINFO replaces
8848 * SCTP_SNDRCV which has been deprecated.
8850 * cmsg_level cmsg_type cmsg_data[]
8851 * ------------ ------------ ---------------------
8852 * IPPROTO_SCTP SCTP_SNDINFO struct sctp_sndinfo
8854 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_sndinfo)))
8857 cmsgs->sinfo = CMSG_DATA(cmsg);
8859 if (cmsgs->sinfo->snd_flags &
8860 ~(SCTP_UNORDERED | SCTP_ADDR_OVER |
8861 SCTP_SACK_IMMEDIATELY | SCTP_SENDALL |
8862 SCTP_PR_SCTP_MASK | SCTP_ABORT | SCTP_EOF))
8866 /* SCTP Socket API Extension
8867 * 5.3.7 SCTP PR-SCTP Information Structure (SCTP_PRINFO)
8869 * This cmsghdr structure specifies SCTP options for sendmsg().
8871 * cmsg_level cmsg_type cmsg_data[]
8872 * ------------ ------------ ---------------------
8873 * IPPROTO_SCTP SCTP_PRINFO struct sctp_prinfo
8875 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_prinfo)))
8878 cmsgs->prinfo = CMSG_DATA(cmsg);
8879 if (cmsgs->prinfo->pr_policy & ~SCTP_PR_SCTP_MASK)
8882 if (cmsgs->prinfo->pr_policy == SCTP_PR_SCTP_NONE)
8883 cmsgs->prinfo->pr_value = 0;
8886 /* SCTP Socket API Extension
8887 * 5.3.8 SCTP AUTH Information Structure (SCTP_AUTHINFO)
8889 * This cmsghdr structure specifies SCTP options for sendmsg().
8891 * cmsg_level cmsg_type cmsg_data[]
8892 * ------------ ------------ ---------------------
8893 * IPPROTO_SCTP SCTP_AUTHINFO struct sctp_authinfo
8895 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_authinfo)))
8898 cmsgs->authinfo = CMSG_DATA(cmsg);
8900 case SCTP_DSTADDRV4:
8901 case SCTP_DSTADDRV6:
8902 /* SCTP Socket API Extension
8903 * 5.3.9/10 SCTP Destination IPv4/6 Address Structure (SCTP_DSTADDRV4/6)
8905 * This cmsghdr structure specifies SCTP options for sendmsg().
8907 * cmsg_level cmsg_type cmsg_data[]
8908 * ------------ ------------ ---------------------
8909 * IPPROTO_SCTP SCTP_DSTADDRV4 struct in_addr
8910 * ------------ ------------ ---------------------
8911 * IPPROTO_SCTP SCTP_DSTADDRV6 struct in6_addr
8913 cmsgs->addrs_msg = my_msg;
8924 * Wait for a packet..
8925 * Note: This function is the same function as in core/datagram.c
8926 * with a few modifications to make lksctp work.
8928 static int sctp_wait_for_packet(struct sock *sk, int *err, long *timeo_p)
8933 prepare_to_wait_exclusive(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
8935 /* Socket errors? */
8936 error = sock_error(sk);
8940 if (!skb_queue_empty(&sk->sk_receive_queue))
8943 /* Socket shut down? */
8944 if (sk->sk_shutdown & RCV_SHUTDOWN)
8947 /* Sequenced packets can come disconnected. If so we report the
8952 /* Is there a good reason to think that we may receive some data? */
8953 if (list_empty(&sctp_sk(sk)->ep->asocs) && !sctp_sstate(sk, LISTENING))
8956 /* Handle signals. */
8957 if (signal_pending(current))
8960 /* Let another process have a go. Since we are going to sleep
8961 * anyway. Note: This may cause odd behaviors if the message
8962 * does not fit in the user's buffer, but this seems to be the
8963 * only way to honor MSG_DONTWAIT realistically.
8966 *timeo_p = schedule_timeout(*timeo_p);
8970 finish_wait(sk_sleep(sk), &wait);
8974 error = sock_intr_errno(*timeo_p);
8977 finish_wait(sk_sleep(sk), &wait);
8982 /* Receive a datagram.
8983 * Note: This is pretty much the same routine as in core/datagram.c
8984 * with a few changes to make lksctp work.
8986 struct sk_buff *sctp_skb_recv_datagram(struct sock *sk, int flags,
8987 int noblock, int *err)
8990 struct sk_buff *skb;
8993 timeo = sock_rcvtimeo(sk, noblock);
8995 pr_debug("%s: timeo:%ld, max:%ld\n", __func__, timeo,
8996 MAX_SCHEDULE_TIMEOUT);
8999 /* Again only user level code calls this function,
9000 * so nothing interrupt level
9001 * will suddenly eat the receive_queue.
9003 * Look at current nfs client by the way...
9004 * However, this function was correct in any case. 8)
9006 if (flags & MSG_PEEK) {
9007 skb = skb_peek(&sk->sk_receive_queue);
9009 refcount_inc(&skb->users);
9011 skb = __skb_dequeue(&sk->sk_receive_queue);
9017 /* Caller is allowed not to check sk->sk_err before calling. */
9018 error = sock_error(sk);
9022 if (sk->sk_shutdown & RCV_SHUTDOWN)
9025 if (sk_can_busy_loop(sk)) {
9026 sk_busy_loop(sk, noblock);
9028 if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
9032 /* User doesn't want to wait. */
9036 } while (sctp_wait_for_packet(sk, err, &timeo) == 0);
9045 /* If sndbuf has changed, wake up per association sndbuf waiters. */
9046 static void __sctp_write_space(struct sctp_association *asoc)
9048 struct sock *sk = asoc->base.sk;
9050 if (sctp_wspace(asoc) <= 0)
9053 if (waitqueue_active(&asoc->wait))
9054 wake_up_interruptible(&asoc->wait);
9056 if (sctp_writeable(sk)) {
9057 struct socket_wq *wq;
9060 wq = rcu_dereference(sk->sk_wq);
9062 if (waitqueue_active(&wq->wait))
9063 wake_up_interruptible(&wq->wait);
9065 /* Note that we try to include the Async I/O support
9066 * here by modeling from the current TCP/UDP code.
9067 * We have not tested with it yet.
9069 if (!(sk->sk_shutdown & SEND_SHUTDOWN))
9070 sock_wake_async(wq, SOCK_WAKE_SPACE, POLL_OUT);
9076 static void sctp_wake_up_waiters(struct sock *sk,
9077 struct sctp_association *asoc)
9079 struct sctp_association *tmp = asoc;
9081 /* We do accounting for the sndbuf space per association,
9082 * so we only need to wake our own association.
9084 if (asoc->ep->sndbuf_policy)
9085 return __sctp_write_space(asoc);
9087 /* If association goes down and is just flushing its
9088 * outq, then just normally notify others.
9090 if (asoc->base.dead)
9091 return sctp_write_space(sk);
9093 /* Accounting for the sndbuf space is per socket, so we
9094 * need to wake up others, try to be fair and in case of
9095 * other associations, let them have a go first instead
9096 * of just doing a sctp_write_space() call.
9098 * Note that we reach sctp_wake_up_waiters() only when
9099 * associations free up queued chunks, thus we are under
9100 * lock and the list of associations on a socket is
9101 * guaranteed not to change.
9103 for (tmp = list_next_entry(tmp, asocs); 1;
9104 tmp = list_next_entry(tmp, asocs)) {
9105 /* Manually skip the head element. */
9106 if (&tmp->asocs == &((sctp_sk(sk))->ep->asocs))
9108 /* Wake up association. */
9109 __sctp_write_space(tmp);
9110 /* We've reached the end. */
9116 /* Do accounting for the sndbuf space.
9117 * Decrement the used sndbuf space of the corresponding association by the
9118 * data size which was just transmitted(freed).
9120 static void sctp_wfree(struct sk_buff *skb)
9122 struct sctp_chunk *chunk = skb_shinfo(skb)->destructor_arg;
9123 struct sctp_association *asoc = chunk->asoc;
9124 struct sock *sk = asoc->base.sk;
9126 sk_mem_uncharge(sk, skb->truesize);
9127 sk->sk_wmem_queued -= skb->truesize + sizeof(struct sctp_chunk);
9128 asoc->sndbuf_used -= skb->truesize + sizeof(struct sctp_chunk);
9129 WARN_ON(refcount_sub_and_test(sizeof(struct sctp_chunk),
9130 &sk->sk_wmem_alloc));
9133 struct sctp_shared_key *shkey = chunk->shkey;
9135 /* refcnt == 2 and !list_empty mean after this release, it's
9136 * not being used anywhere, and it's time to notify userland
9137 * that this shkey can be freed if it's been deactivated.
9139 if (shkey->deactivated && !list_empty(&shkey->key_list) &&
9140 refcount_read(&shkey->refcnt) == 2) {
9141 struct sctp_ulpevent *ev;
9143 ev = sctp_ulpevent_make_authkey(asoc, shkey->key_id,
9147 asoc->stream.si->enqueue_event(&asoc->ulpq, ev);
9149 sctp_auth_shkey_release(chunk->shkey);
9153 sctp_wake_up_waiters(sk, asoc);
9155 sctp_association_put(asoc);
9158 /* Do accounting for the receive space on the socket.
9159 * Accounting for the association is done in ulpevent.c
9160 * We set this as a destructor for the cloned data skbs so that
9161 * accounting is done at the correct time.
9163 void sctp_sock_rfree(struct sk_buff *skb)
9165 struct sock *sk = skb->sk;
9166 struct sctp_ulpevent *event = sctp_skb2event(skb);
9168 atomic_sub(event->rmem_len, &sk->sk_rmem_alloc);
9171 * Mimic the behavior of sock_rfree
9173 sk_mem_uncharge(sk, event->rmem_len);
9177 /* Helper function to wait for space in the sndbuf. */
9178 static int sctp_wait_for_sndbuf(struct sctp_association *asoc, long *timeo_p,
9181 struct sock *sk = asoc->base.sk;
9182 long current_timeo = *timeo_p;
9186 pr_debug("%s: asoc:%p, timeo:%ld, msg_len:%zu\n", __func__, asoc,
9189 /* Increment the association's refcnt. */
9190 sctp_association_hold(asoc);
9192 /* Wait on the association specific sndbuf space. */
9194 prepare_to_wait_exclusive(&asoc->wait, &wait,
9195 TASK_INTERRUPTIBLE);
9196 if (asoc->base.dead)
9200 if (sk->sk_err || asoc->state >= SCTP_STATE_SHUTDOWN_PENDING)
9202 if (signal_pending(current))
9203 goto do_interrupted;
9204 if (sk_under_memory_pressure(sk))
9206 if ((int)msg_len <= sctp_wspace(asoc) &&
9207 sk_wmem_schedule(sk, msg_len))
9210 /* Let another process have a go. Since we are going
9214 current_timeo = schedule_timeout(current_timeo);
9216 if (sk != asoc->base.sk)
9219 *timeo_p = current_timeo;
9223 finish_wait(&asoc->wait, &wait);
9225 /* Release the association's refcnt. */
9226 sctp_association_put(asoc);
9239 err = sock_intr_errno(*timeo_p);
9247 void sctp_data_ready(struct sock *sk)
9249 struct socket_wq *wq;
9252 wq = rcu_dereference(sk->sk_wq);
9253 if (skwq_has_sleeper(wq))
9254 wake_up_interruptible_sync_poll(&wq->wait, EPOLLIN |
9255 EPOLLRDNORM | EPOLLRDBAND);
9256 sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_IN);
9260 /* If socket sndbuf has changed, wake up all per association waiters. */
9261 void sctp_write_space(struct sock *sk)
9263 struct sctp_association *asoc;
9265 /* Wake up the tasks in each wait queue. */
9266 list_for_each_entry(asoc, &((sctp_sk(sk))->ep->asocs), asocs) {
9267 __sctp_write_space(asoc);
9271 /* Is there any sndbuf space available on the socket?
9273 * Note that sk_wmem_alloc is the sum of the send buffers on all of the
9274 * associations on the same socket. For a UDP-style socket with
9275 * multiple associations, it is possible for it to be "unwriteable"
9276 * prematurely. I assume that this is acceptable because
9277 * a premature "unwriteable" is better than an accidental "writeable" which
9278 * would cause an unwanted block under certain circumstances. For the 1-1
9279 * UDP-style sockets or TCP-style sockets, this code should work.
9282 static bool sctp_writeable(struct sock *sk)
9284 return sk->sk_sndbuf > sk->sk_wmem_queued;
9287 /* Wait for an association to go into ESTABLISHED state. If timeout is 0,
9288 * returns immediately with EINPROGRESS.
9290 static int sctp_wait_for_connect(struct sctp_association *asoc, long *timeo_p)
9292 struct sock *sk = asoc->base.sk;
9294 long current_timeo = *timeo_p;
9297 pr_debug("%s: asoc:%p, timeo:%ld\n", __func__, asoc, *timeo_p);
9299 /* Increment the association's refcnt. */
9300 sctp_association_hold(asoc);
9303 prepare_to_wait_exclusive(&asoc->wait, &wait,
9304 TASK_INTERRUPTIBLE);
9307 if (sk->sk_shutdown & RCV_SHUTDOWN)
9309 if (sk->sk_err || asoc->state >= SCTP_STATE_SHUTDOWN_PENDING ||
9312 if (signal_pending(current))
9313 goto do_interrupted;
9315 if (sctp_state(asoc, ESTABLISHED))
9318 /* Let another process have a go. Since we are going
9322 current_timeo = schedule_timeout(current_timeo);
9325 *timeo_p = current_timeo;
9329 finish_wait(&asoc->wait, &wait);
9331 /* Release the association's refcnt. */
9332 sctp_association_put(asoc);
9337 if (asoc->init_err_counter + 1 > asoc->max_init_attempts)
9340 err = -ECONNREFUSED;
9344 err = sock_intr_errno(*timeo_p);
9352 static int sctp_wait_for_accept(struct sock *sk, long timeo)
9354 struct sctp_endpoint *ep;
9358 ep = sctp_sk(sk)->ep;
9362 prepare_to_wait_exclusive(sk_sleep(sk), &wait,
9363 TASK_INTERRUPTIBLE);
9365 if (list_empty(&ep->asocs)) {
9367 timeo = schedule_timeout(timeo);
9372 if (!sctp_sstate(sk, LISTENING))
9376 if (!list_empty(&ep->asocs))
9379 err = sock_intr_errno(timeo);
9380 if (signal_pending(current))
9388 finish_wait(sk_sleep(sk), &wait);
9393 static void sctp_wait_for_close(struct sock *sk, long timeout)
9398 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
9399 if (list_empty(&sctp_sk(sk)->ep->asocs))
9402 timeout = schedule_timeout(timeout);
9404 } while (!signal_pending(current) && timeout);
9406 finish_wait(sk_sleep(sk), &wait);
9409 static void sctp_skb_set_owner_r_frag(struct sk_buff *skb, struct sock *sk)
9411 struct sk_buff *frag;
9416 /* Don't forget the fragments. */
9417 skb_walk_frags(skb, frag)
9418 sctp_skb_set_owner_r_frag(frag, sk);
9421 sctp_skb_set_owner_r(skb, sk);
9424 void sctp_copy_sock(struct sock *newsk, struct sock *sk,
9425 struct sctp_association *asoc)
9427 struct inet_sock *inet = inet_sk(sk);
9428 struct inet_sock *newinet;
9429 struct sctp_sock *sp = sctp_sk(sk);
9430 struct sctp_endpoint *ep = sp->ep;
9432 newsk->sk_type = sk->sk_type;
9433 newsk->sk_bound_dev_if = sk->sk_bound_dev_if;
9434 newsk->sk_flags = sk->sk_flags;
9435 newsk->sk_tsflags = sk->sk_tsflags;
9436 newsk->sk_no_check_tx = sk->sk_no_check_tx;
9437 newsk->sk_no_check_rx = sk->sk_no_check_rx;
9438 newsk->sk_reuse = sk->sk_reuse;
9439 sctp_sk(newsk)->reuse = sp->reuse;
9441 newsk->sk_shutdown = sk->sk_shutdown;
9442 newsk->sk_destruct = sctp_destruct_sock;
9443 newsk->sk_family = sk->sk_family;
9444 newsk->sk_protocol = IPPROTO_SCTP;
9445 newsk->sk_backlog_rcv = sk->sk_prot->backlog_rcv;
9446 newsk->sk_sndbuf = sk->sk_sndbuf;
9447 newsk->sk_rcvbuf = sk->sk_rcvbuf;
9448 newsk->sk_lingertime = sk->sk_lingertime;
9449 newsk->sk_rcvtimeo = sk->sk_rcvtimeo;
9450 newsk->sk_sndtimeo = sk->sk_sndtimeo;
9451 newsk->sk_rxhash = sk->sk_rxhash;
9453 newinet = inet_sk(newsk);
9455 /* Initialize sk's sport, dport, rcv_saddr and daddr for
9456 * getsockname() and getpeername()
9458 newinet->inet_sport = inet->inet_sport;
9459 newinet->inet_saddr = inet->inet_saddr;
9460 newinet->inet_rcv_saddr = inet->inet_rcv_saddr;
9461 newinet->inet_dport = htons(asoc->peer.port);
9462 newinet->pmtudisc = inet->pmtudisc;
9463 newinet->inet_id = prandom_u32();
9465 newinet->uc_ttl = inet->uc_ttl;
9466 newinet->mc_loop = 1;
9467 newinet->mc_ttl = 1;
9468 newinet->mc_index = 0;
9469 newinet->mc_list = NULL;
9471 if (newsk->sk_flags & SK_FLAGS_TIMESTAMP)
9472 net_enable_timestamp();
9474 /* Set newsk security attributes from original sk and connection
9475 * security attribute from ep.
9477 security_sctp_sk_clone(ep, sk, newsk);
9480 static inline void sctp_copy_descendant(struct sock *sk_to,
9481 const struct sock *sk_from)
9483 size_t ancestor_size = sizeof(struct inet_sock);
9485 ancestor_size += sk_from->sk_prot->obj_size;
9486 ancestor_size -= offsetof(struct sctp_sock, pd_lobby);
9487 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
9490 /* Populate the fields of the newsk from the oldsk and migrate the assoc
9491 * and its messages to the newsk.
9493 static int sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
9494 struct sctp_association *assoc,
9495 enum sctp_socket_type type)
9497 struct sctp_sock *oldsp = sctp_sk(oldsk);
9498 struct sctp_sock *newsp = sctp_sk(newsk);
9499 struct sctp_bind_bucket *pp; /* hash list port iterator */
9500 struct sctp_endpoint *newep = newsp->ep;
9501 struct sk_buff *skb, *tmp;
9502 struct sctp_ulpevent *event;
9503 struct sctp_bind_hashbucket *head;
9506 /* Migrate socket buffer sizes and all the socket level options to the
9509 newsk->sk_sndbuf = oldsk->sk_sndbuf;
9510 newsk->sk_rcvbuf = oldsk->sk_rcvbuf;
9511 /* Brute force copy old sctp opt. */
9512 sctp_copy_descendant(newsk, oldsk);
9514 /* Restore the ep value that was overwritten with the above structure
9520 /* Hook this new socket in to the bind_hash list. */
9521 head = &sctp_port_hashtable[sctp_phashfn(sock_net(oldsk),
9522 inet_sk(oldsk)->inet_num)];
9523 spin_lock_bh(&head->lock);
9524 pp = sctp_sk(oldsk)->bind_hash;
9525 sk_add_bind_node(newsk, &pp->owner);
9526 sctp_sk(newsk)->bind_hash = pp;
9527 inet_sk(newsk)->inet_num = inet_sk(oldsk)->inet_num;
9528 spin_unlock_bh(&head->lock);
9530 /* Copy the bind_addr list from the original endpoint to the new
9531 * endpoint so that we can handle restarts properly
9533 err = sctp_bind_addr_dup(&newsp->ep->base.bind_addr,
9534 &oldsp->ep->base.bind_addr, GFP_KERNEL);
9538 /* New ep's auth_hmacs should be set if old ep's is set, in case
9539 * that net->sctp.auth_enable has been changed to 0 by users and
9540 * new ep's auth_hmacs couldn't be set in sctp_endpoint_init().
9542 if (oldsp->ep->auth_hmacs) {
9543 err = sctp_auth_init_hmacs(newsp->ep, GFP_KERNEL);
9548 sctp_auto_asconf_init(newsp);
9550 /* Move any messages in the old socket's receive queue that are for the
9551 * peeled off association to the new socket's receive queue.
9553 sctp_skb_for_each(skb, &oldsk->sk_receive_queue, tmp) {
9554 event = sctp_skb2event(skb);
9555 if (event->asoc == assoc) {
9556 __skb_unlink(skb, &oldsk->sk_receive_queue);
9557 __skb_queue_tail(&newsk->sk_receive_queue, skb);
9558 sctp_skb_set_owner_r_frag(skb, newsk);
9562 /* Clean up any messages pending delivery due to partial
9563 * delivery. Three cases:
9564 * 1) No partial deliver; no work.
9565 * 2) Peeling off partial delivery; keep pd_lobby in new pd_lobby.
9566 * 3) Peeling off non-partial delivery; move pd_lobby to receive_queue.
9568 atomic_set(&sctp_sk(newsk)->pd_mode, assoc->ulpq.pd_mode);
9570 if (atomic_read(&sctp_sk(oldsk)->pd_mode)) {
9571 struct sk_buff_head *queue;
9573 /* Decide which queue to move pd_lobby skbs to. */
9574 if (assoc->ulpq.pd_mode) {
9575 queue = &newsp->pd_lobby;
9577 queue = &newsk->sk_receive_queue;
9579 /* Walk through the pd_lobby, looking for skbs that
9580 * need moved to the new socket.
9582 sctp_skb_for_each(skb, &oldsp->pd_lobby, tmp) {
9583 event = sctp_skb2event(skb);
9584 if (event->asoc == assoc) {
9585 __skb_unlink(skb, &oldsp->pd_lobby);
9586 __skb_queue_tail(queue, skb);
9587 sctp_skb_set_owner_r_frag(skb, newsk);
9591 /* Clear up any skbs waiting for the partial
9592 * delivery to finish.
9594 if (assoc->ulpq.pd_mode)
9595 sctp_clear_pd(oldsk, NULL);
9599 sctp_for_each_rx_skb(assoc, newsk, sctp_skb_set_owner_r_frag);
9601 /* Set the type of socket to indicate that it is peeled off from the
9602 * original UDP-style socket or created with the accept() call on a
9603 * TCP-style socket..
9607 /* Mark the new socket "in-use" by the user so that any packets
9608 * that may arrive on the association after we've moved it are
9609 * queued to the backlog. This prevents a potential race between
9610 * backlog processing on the old socket and new-packet processing
9611 * on the new socket.
9613 * The caller has just allocated newsk so we can guarantee that other
9614 * paths won't try to lock it and then oldsk.
9616 lock_sock_nested(newsk, SINGLE_DEPTH_NESTING);
9617 sctp_for_each_tx_datachunk(assoc, true, sctp_clear_owner_w);
9618 sctp_assoc_migrate(assoc, newsk);
9619 sctp_for_each_tx_datachunk(assoc, false, sctp_set_owner_w);
9621 /* If the association on the newsk is already closed before accept()
9622 * is called, set RCV_SHUTDOWN flag.
9624 if (sctp_state(assoc, CLOSED) && sctp_style(newsk, TCP)) {
9625 inet_sk_set_state(newsk, SCTP_SS_CLOSED);
9626 newsk->sk_shutdown |= RCV_SHUTDOWN;
9628 inet_sk_set_state(newsk, SCTP_SS_ESTABLISHED);
9631 release_sock(newsk);
9637 /* This proto struct describes the ULP interface for SCTP. */
9638 struct proto sctp_prot = {
9640 .owner = THIS_MODULE,
9641 .close = sctp_close,
9642 .disconnect = sctp_disconnect,
9643 .accept = sctp_accept,
9644 .ioctl = sctp_ioctl,
9645 .init = sctp_init_sock,
9646 .destroy = sctp_destroy_sock,
9647 .shutdown = sctp_shutdown,
9648 .setsockopt = sctp_setsockopt,
9649 .getsockopt = sctp_getsockopt,
9650 .sendmsg = sctp_sendmsg,
9651 .recvmsg = sctp_recvmsg,
9653 .bind_add = sctp_bind_add,
9654 .backlog_rcv = sctp_backlog_rcv,
9656 .unhash = sctp_unhash,
9657 .no_autobind = true,
9658 .obj_size = sizeof(struct sctp_sock),
9659 .useroffset = offsetof(struct sctp_sock, subscribe),
9660 .usersize = offsetof(struct sctp_sock, initmsg) -
9661 offsetof(struct sctp_sock, subscribe) +
9662 sizeof_field(struct sctp_sock, initmsg),
9663 .sysctl_mem = sysctl_sctp_mem,
9664 .sysctl_rmem = sysctl_sctp_rmem,
9665 .sysctl_wmem = sysctl_sctp_wmem,
9666 .memory_pressure = &sctp_memory_pressure,
9667 .enter_memory_pressure = sctp_enter_memory_pressure,
9668 .memory_allocated = &sctp_memory_allocated,
9669 .sockets_allocated = &sctp_sockets_allocated,
9672 #if IS_ENABLED(CONFIG_IPV6)
9674 #include <net/transp_v6.h>
9675 static void sctp_v6_destroy_sock(struct sock *sk)
9677 sctp_destroy_sock(sk);
9678 inet6_destroy_sock(sk);
9681 struct proto sctpv6_prot = {
9683 .owner = THIS_MODULE,
9684 .close = sctp_close,
9685 .disconnect = sctp_disconnect,
9686 .accept = sctp_accept,
9687 .ioctl = sctp_ioctl,
9688 .init = sctp_init_sock,
9689 .destroy = sctp_v6_destroy_sock,
9690 .shutdown = sctp_shutdown,
9691 .setsockopt = sctp_setsockopt,
9692 .getsockopt = sctp_getsockopt,
9693 .sendmsg = sctp_sendmsg,
9694 .recvmsg = sctp_recvmsg,
9696 .bind_add = sctp_bind_add,
9697 .backlog_rcv = sctp_backlog_rcv,
9699 .unhash = sctp_unhash,
9700 .no_autobind = true,
9701 .obj_size = sizeof(struct sctp6_sock),
9702 .useroffset = offsetof(struct sctp6_sock, sctp.subscribe),
9703 .usersize = offsetof(struct sctp6_sock, sctp.initmsg) -
9704 offsetof(struct sctp6_sock, sctp.subscribe) +
9705 sizeof_field(struct sctp6_sock, sctp.initmsg),
9706 .sysctl_mem = sysctl_sctp_mem,
9707 .sysctl_rmem = sysctl_sctp_rmem,
9708 .sysctl_wmem = sysctl_sctp_wmem,
9709 .memory_pressure = &sctp_memory_pressure,
9710 .enter_memory_pressure = sctp_enter_memory_pressure,
9711 .memory_allocated = &sctp_memory_allocated,
9712 .sockets_allocated = &sctp_sockets_allocated,
9714 #endif /* IS_ENABLED(CONFIG_IPV6) */