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(const 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 WRITE_ONCE(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_wmem_queued_add(sk, 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_bh(&net->sctp.addr_wq_lock);
366 list_add_tail(&sp->auto_asconf_list, &net->sctp.auto_asconf_splist);
367 spin_unlock_bh(&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);
1834 if (unlikely(sinfo->sinfo_stream >= asoc->stream.outcnt)) {
1840 if (sctp_state(asoc, CLOSED)) {
1841 err = sctp_primitive_ASSOCIATE(net, asoc, NULL);
1845 if (asoc->ep->intl_enable) {
1846 timeo = sock_sndtimeo(sk, 0);
1847 err = sctp_wait_for_connect(asoc, &timeo);
1853 wait_connect = true;
1856 pr_debug("%s: we associated primitively\n", __func__);
1859 datamsg = sctp_datamsg_from_user(asoc, sinfo, &msg->msg_iter);
1860 if (IS_ERR(datamsg)) {
1861 err = PTR_ERR(datamsg);
1865 asoc->force_delay = !!(msg->msg_flags & MSG_MORE);
1867 list_for_each_entry(chunk, &datamsg->chunks, frag_list) {
1868 sctp_chunk_hold(chunk);
1869 sctp_set_owner_w(chunk);
1870 chunk->transport = transport;
1873 err = sctp_primitive_SEND(net, asoc, datamsg);
1875 sctp_datamsg_free(datamsg);
1879 pr_debug("%s: we sent primitively\n", __func__);
1881 sctp_datamsg_put(datamsg);
1883 if (unlikely(wait_connect)) {
1884 timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT);
1885 sctp_wait_for_connect(asoc, &timeo);
1894 static union sctp_addr *sctp_sendmsg_get_daddr(struct sock *sk,
1895 const struct msghdr *msg,
1896 struct sctp_cmsgs *cmsgs)
1898 union sctp_addr *daddr = NULL;
1901 if (!sctp_style(sk, UDP_HIGH_BANDWIDTH) && msg->msg_name) {
1902 int len = msg->msg_namelen;
1904 if (len > sizeof(*daddr))
1905 len = sizeof(*daddr);
1907 daddr = (union sctp_addr *)msg->msg_name;
1909 err = sctp_verify_addr(sk, daddr, len);
1911 return ERR_PTR(err);
1917 static void sctp_sendmsg_update_sinfo(struct sctp_association *asoc,
1918 struct sctp_sndrcvinfo *sinfo,
1919 struct sctp_cmsgs *cmsgs)
1921 if (!cmsgs->srinfo && !cmsgs->sinfo) {
1922 sinfo->sinfo_stream = asoc->default_stream;
1923 sinfo->sinfo_ppid = asoc->default_ppid;
1924 sinfo->sinfo_context = asoc->default_context;
1925 sinfo->sinfo_assoc_id = sctp_assoc2id(asoc);
1928 sinfo->sinfo_flags = asoc->default_flags;
1931 if (!cmsgs->srinfo && !cmsgs->prinfo)
1932 sinfo->sinfo_timetolive = asoc->default_timetolive;
1934 if (cmsgs->authinfo) {
1935 /* Reuse sinfo_tsn to indicate that authinfo was set and
1936 * sinfo_ssn to save the keyid on tx path.
1938 sinfo->sinfo_tsn = 1;
1939 sinfo->sinfo_ssn = cmsgs->authinfo->auth_keynumber;
1943 static int sctp_sendmsg(struct sock *sk, struct msghdr *msg, size_t msg_len)
1945 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
1946 struct sctp_transport *transport = NULL;
1947 struct sctp_sndrcvinfo _sinfo, *sinfo;
1948 struct sctp_association *asoc, *tmp;
1949 struct sctp_cmsgs cmsgs;
1950 union sctp_addr *daddr;
1955 /* Parse and get snd_info */
1956 err = sctp_sendmsg_parse(sk, &cmsgs, &_sinfo, msg, msg_len);
1961 sflags = sinfo->sinfo_flags;
1963 /* Get daddr from msg */
1964 daddr = sctp_sendmsg_get_daddr(sk, msg, &cmsgs);
1965 if (IS_ERR(daddr)) {
1966 err = PTR_ERR(daddr);
1972 /* SCTP_SENDALL process */
1973 if ((sflags & SCTP_SENDALL) && sctp_style(sk, UDP)) {
1974 list_for_each_entry_safe(asoc, tmp, &ep->asocs, asocs) {
1975 err = sctp_sendmsg_check_sflags(asoc, sflags, msg,
1982 sctp_sendmsg_update_sinfo(asoc, sinfo, &cmsgs);
1984 err = sctp_sendmsg_to_asoc(asoc, msg, msg_len,
1989 iov_iter_revert(&msg->msg_iter, err);
1995 /* Get and check or create asoc */
1997 asoc = sctp_endpoint_lookup_assoc(ep, daddr, &transport);
1999 err = sctp_sendmsg_check_sflags(asoc, sflags, msg,
2004 err = sctp_sendmsg_new_asoc(sk, sflags, &cmsgs, daddr,
2009 asoc = transport->asoc;
2013 if (!sctp_style(sk, TCP) && !(sflags & SCTP_ADDR_OVER))
2016 asoc = sctp_id2assoc(sk, sinfo->sinfo_assoc_id);
2022 err = sctp_sendmsg_check_sflags(asoc, sflags, msg, msg_len);
2027 /* Update snd_info with the asoc */
2028 sctp_sendmsg_update_sinfo(asoc, sinfo, &cmsgs);
2030 /* Send msg to the asoc */
2031 err = sctp_sendmsg_to_asoc(asoc, msg, msg_len, transport, sinfo);
2032 if (err < 0 && err != -ESRCH && new)
2033 sctp_association_free(asoc);
2038 return sctp_error(sk, msg->msg_flags, err);
2041 /* This is an extended version of skb_pull() that removes the data from the
2042 * start of a skb even when data is spread across the list of skb's in the
2043 * frag_list. len specifies the total amount of data that needs to be removed.
2044 * when 'len' bytes could be removed from the skb, it returns 0.
2045 * If 'len' exceeds the total skb length, it returns the no. of bytes that
2046 * could not be removed.
2048 static int sctp_skb_pull(struct sk_buff *skb, int len)
2050 struct sk_buff *list;
2051 int skb_len = skb_headlen(skb);
2054 if (len <= skb_len) {
2055 __skb_pull(skb, len);
2059 __skb_pull(skb, skb_len);
2061 skb_walk_frags(skb, list) {
2062 rlen = sctp_skb_pull(list, len);
2063 skb->len -= (len-rlen);
2064 skb->data_len -= (len-rlen);
2075 /* API 3.1.3 recvmsg() - UDP Style Syntax
2077 * ssize_t recvmsg(int socket, struct msghdr *message,
2080 * socket - the socket descriptor of the endpoint.
2081 * message - pointer to the msghdr structure which contains a single
2082 * user message and possibly some ancillary data.
2084 * See Section 5 for complete description of the data
2087 * flags - flags sent or received with the user message, see Section
2088 * 5 for complete description of the flags.
2090 static int sctp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
2091 int noblock, int flags, int *addr_len)
2093 struct sctp_ulpevent *event = NULL;
2094 struct sctp_sock *sp = sctp_sk(sk);
2095 struct sk_buff *skb, *head_skb;
2100 pr_debug("%s: sk:%p, msghdr:%p, len:%zd, noblock:%d, flags:0x%x, "
2101 "addr_len:%p)\n", __func__, sk, msg, len, noblock, flags,
2106 if (sctp_style(sk, TCP) && !sctp_sstate(sk, ESTABLISHED) &&
2107 !sctp_sstate(sk, CLOSING) && !sctp_sstate(sk, CLOSED)) {
2112 skb = sctp_skb_recv_datagram(sk, flags, noblock, &err);
2116 /* Get the total length of the skb including any skb's in the
2125 err = skb_copy_datagram_msg(skb, 0, msg, copied);
2127 event = sctp_skb2event(skb);
2132 if (event->chunk && event->chunk->head_skb)
2133 head_skb = event->chunk->head_skb;
2136 sock_recv_ts_and_drops(msg, sk, head_skb);
2137 if (sctp_ulpevent_is_notification(event)) {
2138 msg->msg_flags |= MSG_NOTIFICATION;
2139 sp->pf->event_msgname(event, msg->msg_name, addr_len);
2141 sp->pf->skb_msgname(head_skb, msg->msg_name, addr_len);
2144 /* Check if we allow SCTP_NXTINFO. */
2145 if (sp->recvnxtinfo)
2146 sctp_ulpevent_read_nxtinfo(event, msg, sk);
2147 /* Check if we allow SCTP_RCVINFO. */
2148 if (sp->recvrcvinfo)
2149 sctp_ulpevent_read_rcvinfo(event, msg);
2150 /* Check if we allow SCTP_SNDRCVINFO. */
2151 if (sctp_ulpevent_type_enabled(sp->subscribe, SCTP_DATA_IO_EVENT))
2152 sctp_ulpevent_read_sndrcvinfo(event, msg);
2156 /* If skb's length exceeds the user's buffer, update the skb and
2157 * push it back to the receive_queue so that the next call to
2158 * recvmsg() will return the remaining data. Don't set MSG_EOR.
2160 if (skb_len > copied) {
2161 msg->msg_flags &= ~MSG_EOR;
2162 if (flags & MSG_PEEK)
2164 sctp_skb_pull(skb, copied);
2165 skb_queue_head(&sk->sk_receive_queue, skb);
2167 /* When only partial message is copied to the user, increase
2168 * rwnd by that amount. If all the data in the skb is read,
2169 * rwnd is updated when the event is freed.
2171 if (!sctp_ulpevent_is_notification(event))
2172 sctp_assoc_rwnd_increase(event->asoc, copied);
2174 } else if ((event->msg_flags & MSG_NOTIFICATION) ||
2175 (event->msg_flags & MSG_EOR))
2176 msg->msg_flags |= MSG_EOR;
2178 msg->msg_flags &= ~MSG_EOR;
2181 if (flags & MSG_PEEK) {
2182 /* Release the skb reference acquired after peeking the skb in
2183 * sctp_skb_recv_datagram().
2187 /* Free the event which includes releasing the reference to
2188 * the owner of the skb, freeing the skb and updating the
2191 sctp_ulpevent_free(event);
2198 /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS)
2200 * This option is a on/off flag. If enabled no SCTP message
2201 * fragmentation will be performed. Instead if a message being sent
2202 * exceeds the current PMTU size, the message will NOT be sent and
2203 * instead a error will be indicated to the user.
2205 static int sctp_setsockopt_disable_fragments(struct sock *sk, int *val,
2206 unsigned int optlen)
2208 if (optlen < sizeof(int))
2210 sctp_sk(sk)->disable_fragments = (*val == 0) ? 0 : 1;
2214 static int sctp_setsockopt_events(struct sock *sk, __u8 *sn_type,
2215 unsigned int optlen)
2217 struct sctp_sock *sp = sctp_sk(sk);
2218 struct sctp_association *asoc;
2221 if (optlen > sizeof(struct sctp_event_subscribe))
2224 for (i = 0; i < optlen; i++)
2225 sctp_ulpevent_type_set(&sp->subscribe, SCTP_SN_TYPE_BASE + i,
2228 list_for_each_entry(asoc, &sp->ep->asocs, asocs)
2229 asoc->subscribe = sctp_sk(sk)->subscribe;
2231 /* At the time when a user app subscribes to SCTP_SENDER_DRY_EVENT,
2232 * if there is no data to be sent or retransmit, the stack will
2233 * immediately send up this notification.
2235 if (sctp_ulpevent_type_enabled(sp->subscribe, SCTP_SENDER_DRY_EVENT)) {
2236 struct sctp_ulpevent *event;
2238 asoc = sctp_id2assoc(sk, 0);
2239 if (asoc && sctp_outq_is_empty(&asoc->outqueue)) {
2240 event = sctp_ulpevent_make_sender_dry_event(asoc,
2241 GFP_USER | __GFP_NOWARN);
2245 asoc->stream.si->enqueue_event(&asoc->ulpq, event);
2252 /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE)
2254 * This socket option is applicable to the UDP-style socket only. When
2255 * set it will cause associations that are idle for more than the
2256 * specified number of seconds to automatically close. An association
2257 * being idle is defined an association that has NOT sent or received
2258 * user data. The special value of '0' indicates that no automatic
2259 * close of any associations should be performed. The option expects an
2260 * integer defining the number of seconds of idle time before an
2261 * association is closed.
2263 static int sctp_setsockopt_autoclose(struct sock *sk, u32 *optval,
2264 unsigned int optlen)
2266 struct sctp_sock *sp = sctp_sk(sk);
2267 struct net *net = sock_net(sk);
2269 /* Applicable to UDP-style socket only */
2270 if (sctp_style(sk, TCP))
2272 if (optlen != sizeof(int))
2275 sp->autoclose = *optval;
2276 if (sp->autoclose > net->sctp.max_autoclose)
2277 sp->autoclose = net->sctp.max_autoclose;
2282 /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS)
2284 * Applications can enable or disable heartbeats for any peer address of
2285 * an association, modify an address's heartbeat interval, force a
2286 * heartbeat to be sent immediately, and adjust the address's maximum
2287 * number of retransmissions sent before an address is considered
2288 * unreachable. The following structure is used to access and modify an
2289 * address's parameters:
2291 * struct sctp_paddrparams {
2292 * sctp_assoc_t spp_assoc_id;
2293 * struct sockaddr_storage spp_address;
2294 * uint32_t spp_hbinterval;
2295 * uint16_t spp_pathmaxrxt;
2296 * uint32_t spp_pathmtu;
2297 * uint32_t spp_sackdelay;
2298 * uint32_t spp_flags;
2299 * uint32_t spp_ipv6_flowlabel;
2303 * spp_assoc_id - (one-to-many style socket) This is filled in the
2304 * application, and identifies the association for
2306 * spp_address - This specifies which address is of interest.
2307 * spp_hbinterval - This contains the value of the heartbeat interval,
2308 * in milliseconds. If a value of zero
2309 * is present in this field then no changes are to
2310 * be made to this parameter.
2311 * spp_pathmaxrxt - This contains the maximum number of
2312 * retransmissions before this address shall be
2313 * considered unreachable. If a value of zero
2314 * is present in this field then no changes are to
2315 * be made to this parameter.
2316 * spp_pathmtu - When Path MTU discovery is disabled the value
2317 * specified here will be the "fixed" path mtu.
2318 * Note that if the spp_address field is empty
2319 * then all associations on this address will
2320 * have this fixed path mtu set upon them.
2322 * spp_sackdelay - When delayed sack is enabled, this value specifies
2323 * the number of milliseconds that sacks will be delayed
2324 * for. This value will apply to all addresses of an
2325 * association if the spp_address field is empty. Note
2326 * also, that if delayed sack is enabled and this
2327 * value is set to 0, no change is made to the last
2328 * recorded delayed sack timer value.
2330 * spp_flags - These flags are used to control various features
2331 * on an association. The flag field may contain
2332 * zero or more of the following options.
2334 * SPP_HB_ENABLE - Enable heartbeats on the
2335 * specified address. Note that if the address
2336 * field is empty all addresses for the association
2337 * have heartbeats enabled upon them.
2339 * SPP_HB_DISABLE - Disable heartbeats on the
2340 * speicifed address. Note that if the address
2341 * field is empty all addresses for the association
2342 * will have their heartbeats disabled. Note also
2343 * that SPP_HB_ENABLE and SPP_HB_DISABLE are
2344 * mutually exclusive, only one of these two should
2345 * be specified. Enabling both fields will have
2346 * undetermined results.
2348 * SPP_HB_DEMAND - Request a user initiated heartbeat
2349 * to be made immediately.
2351 * SPP_HB_TIME_IS_ZERO - Specify's that the time for
2352 * heartbeat delayis to be set to the value of 0
2355 * SPP_PMTUD_ENABLE - This field will enable PMTU
2356 * discovery upon the specified address. Note that
2357 * if the address feild is empty then all addresses
2358 * on the association are effected.
2360 * SPP_PMTUD_DISABLE - This field will disable PMTU
2361 * discovery upon the specified address. Note that
2362 * if the address feild is empty then all addresses
2363 * on the association are effected. Not also that
2364 * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually
2365 * exclusive. Enabling both will have undetermined
2368 * SPP_SACKDELAY_ENABLE - Setting this flag turns
2369 * on delayed sack. The time specified in spp_sackdelay
2370 * is used to specify the sack delay for this address. Note
2371 * that if spp_address is empty then all addresses will
2372 * enable delayed sack and take on the sack delay
2373 * value specified in spp_sackdelay.
2374 * SPP_SACKDELAY_DISABLE - Setting this flag turns
2375 * off delayed sack. If the spp_address field is blank then
2376 * delayed sack is disabled for the entire association. Note
2377 * also that this field is mutually exclusive to
2378 * SPP_SACKDELAY_ENABLE, setting both will have undefined
2381 * SPP_IPV6_FLOWLABEL: Setting this flag enables the
2382 * setting of the IPV6 flow label value. The value is
2383 * contained in the spp_ipv6_flowlabel field.
2384 * Upon retrieval, this flag will be set to indicate that
2385 * the spp_ipv6_flowlabel field has a valid value returned.
2386 * If a specific destination address is set (in the
2387 * spp_address field), then the value returned is that of
2388 * the address. If just an association is specified (and
2389 * no address), then the association's default flow label
2390 * is returned. If neither an association nor a destination
2391 * is specified, then the socket's default flow label is
2392 * returned. For non-IPv6 sockets, this flag will be left
2395 * SPP_DSCP: Setting this flag enables the setting of the
2396 * Differentiated Services Code Point (DSCP) value
2397 * associated with either the association or a specific
2398 * address. The value is obtained in the spp_dscp field.
2399 * Upon retrieval, this flag will be set to indicate that
2400 * the spp_dscp field has a valid value returned. If a
2401 * specific destination address is set when called (in the
2402 * spp_address field), then that specific destination
2403 * address's DSCP value is returned. If just an association
2404 * is specified, then the association's default DSCP is
2405 * returned. If neither an association nor a destination is
2406 * specified, then the socket's default DSCP is returned.
2408 * spp_ipv6_flowlabel
2409 * - This field is used in conjunction with the
2410 * SPP_IPV6_FLOWLABEL flag and contains the IPv6 flow label.
2411 * The 20 least significant bits are used for the flow
2412 * label. This setting has precedence over any IPv6-layer
2415 * spp_dscp - This field is used in conjunction with the SPP_DSCP flag
2416 * and contains the DSCP. The 6 most significant bits are
2417 * used for the DSCP. This setting has precedence over any
2418 * IPv4- or IPv6- layer setting.
2420 static int sctp_apply_peer_addr_params(struct sctp_paddrparams *params,
2421 struct sctp_transport *trans,
2422 struct sctp_association *asoc,
2423 struct sctp_sock *sp,
2426 int sackdelay_change)
2430 if (params->spp_flags & SPP_HB_DEMAND && trans) {
2431 error = sctp_primitive_REQUESTHEARTBEAT(trans->asoc->base.net,
2432 trans->asoc, trans);
2437 /* Note that unless the spp_flag is set to SPP_HB_ENABLE the value of
2438 * this field is ignored. Note also that a value of zero indicates
2439 * the current setting should be left unchanged.
2441 if (params->spp_flags & SPP_HB_ENABLE) {
2443 /* Re-zero the interval if the SPP_HB_TIME_IS_ZERO is
2444 * set. This lets us use 0 value when this flag
2447 if (params->spp_flags & SPP_HB_TIME_IS_ZERO)
2448 params->spp_hbinterval = 0;
2450 if (params->spp_hbinterval ||
2451 (params->spp_flags & SPP_HB_TIME_IS_ZERO)) {
2454 msecs_to_jiffies(params->spp_hbinterval);
2455 sctp_transport_reset_hb_timer(trans);
2458 msecs_to_jiffies(params->spp_hbinterval);
2460 sp->hbinterval = params->spp_hbinterval;
2467 trans->param_flags =
2468 (trans->param_flags & ~SPP_HB) | hb_change;
2471 (asoc->param_flags & ~SPP_HB) | hb_change;
2474 (sp->param_flags & ~SPP_HB) | hb_change;
2478 /* When Path MTU discovery is disabled the value specified here will
2479 * be the "fixed" path mtu (i.e. the value of the spp_flags field must
2480 * include the flag SPP_PMTUD_DISABLE for this field to have any
2483 if ((params->spp_flags & SPP_PMTUD_DISABLE) && params->spp_pathmtu) {
2485 trans->pathmtu = params->spp_pathmtu;
2486 sctp_assoc_sync_pmtu(asoc);
2488 sctp_assoc_set_pmtu(asoc, params->spp_pathmtu);
2490 sp->pathmtu = params->spp_pathmtu;
2496 int update = (trans->param_flags & SPP_PMTUD_DISABLE) &&
2497 (params->spp_flags & SPP_PMTUD_ENABLE);
2498 trans->param_flags =
2499 (trans->param_flags & ~SPP_PMTUD) | pmtud_change;
2501 sctp_transport_pmtu(trans, sctp_opt2sk(sp));
2502 sctp_assoc_sync_pmtu(asoc);
2504 sctp_transport_pl_reset(trans);
2507 (asoc->param_flags & ~SPP_PMTUD) | pmtud_change;
2510 (sp->param_flags & ~SPP_PMTUD) | pmtud_change;
2514 /* Note that unless the spp_flag is set to SPP_SACKDELAY_ENABLE the
2515 * value of this field is ignored. Note also that a value of zero
2516 * indicates the current setting should be left unchanged.
2518 if ((params->spp_flags & SPP_SACKDELAY_ENABLE) && params->spp_sackdelay) {
2521 msecs_to_jiffies(params->spp_sackdelay);
2524 msecs_to_jiffies(params->spp_sackdelay);
2526 sp->sackdelay = params->spp_sackdelay;
2530 if (sackdelay_change) {
2532 trans->param_flags =
2533 (trans->param_flags & ~SPP_SACKDELAY) |
2537 (asoc->param_flags & ~SPP_SACKDELAY) |
2541 (sp->param_flags & ~SPP_SACKDELAY) |
2546 /* Note that a value of zero indicates the current setting should be
2549 if (params->spp_pathmaxrxt) {
2551 trans->pathmaxrxt = params->spp_pathmaxrxt;
2553 asoc->pathmaxrxt = params->spp_pathmaxrxt;
2555 sp->pathmaxrxt = params->spp_pathmaxrxt;
2559 if (params->spp_flags & SPP_IPV6_FLOWLABEL) {
2561 if (trans->ipaddr.sa.sa_family == AF_INET6) {
2562 trans->flowlabel = params->spp_ipv6_flowlabel &
2563 SCTP_FLOWLABEL_VAL_MASK;
2564 trans->flowlabel |= SCTP_FLOWLABEL_SET_MASK;
2567 struct sctp_transport *t;
2569 list_for_each_entry(t, &asoc->peer.transport_addr_list,
2571 if (t->ipaddr.sa.sa_family != AF_INET6)
2573 t->flowlabel = params->spp_ipv6_flowlabel &
2574 SCTP_FLOWLABEL_VAL_MASK;
2575 t->flowlabel |= SCTP_FLOWLABEL_SET_MASK;
2577 asoc->flowlabel = params->spp_ipv6_flowlabel &
2578 SCTP_FLOWLABEL_VAL_MASK;
2579 asoc->flowlabel |= SCTP_FLOWLABEL_SET_MASK;
2580 } else if (sctp_opt2sk(sp)->sk_family == AF_INET6) {
2581 sp->flowlabel = params->spp_ipv6_flowlabel &
2582 SCTP_FLOWLABEL_VAL_MASK;
2583 sp->flowlabel |= SCTP_FLOWLABEL_SET_MASK;
2587 if (params->spp_flags & SPP_DSCP) {
2589 trans->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK;
2590 trans->dscp |= SCTP_DSCP_SET_MASK;
2592 struct sctp_transport *t;
2594 list_for_each_entry(t, &asoc->peer.transport_addr_list,
2596 t->dscp = params->spp_dscp &
2598 t->dscp |= SCTP_DSCP_SET_MASK;
2600 asoc->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK;
2601 asoc->dscp |= SCTP_DSCP_SET_MASK;
2603 sp->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK;
2604 sp->dscp |= SCTP_DSCP_SET_MASK;
2611 static int sctp_setsockopt_peer_addr_params(struct sock *sk,
2612 struct sctp_paddrparams *params,
2613 unsigned int optlen)
2615 struct sctp_transport *trans = NULL;
2616 struct sctp_association *asoc = NULL;
2617 struct sctp_sock *sp = sctp_sk(sk);
2619 int hb_change, pmtud_change, sackdelay_change;
2621 if (optlen == ALIGN(offsetof(struct sctp_paddrparams,
2622 spp_ipv6_flowlabel), 4)) {
2623 if (params->spp_flags & (SPP_DSCP | SPP_IPV6_FLOWLABEL))
2625 } else if (optlen != sizeof(*params)) {
2629 /* Validate flags and value parameters. */
2630 hb_change = params->spp_flags & SPP_HB;
2631 pmtud_change = params->spp_flags & SPP_PMTUD;
2632 sackdelay_change = params->spp_flags & SPP_SACKDELAY;
2634 if (hb_change == SPP_HB ||
2635 pmtud_change == SPP_PMTUD ||
2636 sackdelay_change == SPP_SACKDELAY ||
2637 params->spp_sackdelay > 500 ||
2638 (params->spp_pathmtu &&
2639 params->spp_pathmtu < SCTP_DEFAULT_MINSEGMENT))
2642 /* If an address other than INADDR_ANY is specified, and
2643 * no transport is found, then the request is invalid.
2645 if (!sctp_is_any(sk, (union sctp_addr *)¶ms->spp_address)) {
2646 trans = sctp_addr_id2transport(sk, ¶ms->spp_address,
2647 params->spp_assoc_id);
2652 /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
2653 * socket is a one to many style socket, and an association
2654 * was not found, then the id was invalid.
2656 asoc = sctp_id2assoc(sk, params->spp_assoc_id);
2657 if (!asoc && params->spp_assoc_id != SCTP_FUTURE_ASSOC &&
2658 sctp_style(sk, UDP))
2661 /* Heartbeat demand can only be sent on a transport or
2662 * association, but not a socket.
2664 if (params->spp_flags & SPP_HB_DEMAND && !trans && !asoc)
2667 /* Process parameters. */
2668 error = sctp_apply_peer_addr_params(params, trans, asoc, sp,
2669 hb_change, pmtud_change,
2675 /* If changes are for association, also apply parameters to each
2678 if (!trans && asoc) {
2679 list_for_each_entry(trans, &asoc->peer.transport_addr_list,
2681 sctp_apply_peer_addr_params(params, trans, asoc, sp,
2682 hb_change, pmtud_change,
2690 static inline __u32 sctp_spp_sackdelay_enable(__u32 param_flags)
2692 return (param_flags & ~SPP_SACKDELAY) | SPP_SACKDELAY_ENABLE;
2695 static inline __u32 sctp_spp_sackdelay_disable(__u32 param_flags)
2697 return (param_flags & ~SPP_SACKDELAY) | SPP_SACKDELAY_DISABLE;
2700 static void sctp_apply_asoc_delayed_ack(struct sctp_sack_info *params,
2701 struct sctp_association *asoc)
2703 struct sctp_transport *trans;
2705 if (params->sack_delay) {
2706 asoc->sackdelay = msecs_to_jiffies(params->sack_delay);
2708 sctp_spp_sackdelay_enable(asoc->param_flags);
2710 if (params->sack_freq == 1) {
2712 sctp_spp_sackdelay_disable(asoc->param_flags);
2713 } else if (params->sack_freq > 1) {
2714 asoc->sackfreq = params->sack_freq;
2716 sctp_spp_sackdelay_enable(asoc->param_flags);
2719 list_for_each_entry(trans, &asoc->peer.transport_addr_list,
2721 if (params->sack_delay) {
2722 trans->sackdelay = msecs_to_jiffies(params->sack_delay);
2723 trans->param_flags =
2724 sctp_spp_sackdelay_enable(trans->param_flags);
2726 if (params->sack_freq == 1) {
2727 trans->param_flags =
2728 sctp_spp_sackdelay_disable(trans->param_flags);
2729 } else if (params->sack_freq > 1) {
2730 trans->sackfreq = params->sack_freq;
2731 trans->param_flags =
2732 sctp_spp_sackdelay_enable(trans->param_flags);
2738 * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK)
2740 * This option will effect the way delayed acks are performed. This
2741 * option allows you to get or set the delayed ack time, in
2742 * milliseconds. It also allows changing the delayed ack frequency.
2743 * Changing the frequency to 1 disables the delayed sack algorithm. If
2744 * the assoc_id is 0, then this sets or gets the endpoints default
2745 * values. If the assoc_id field is non-zero, then the set or get
2746 * effects the specified association for the one to many model (the
2747 * assoc_id field is ignored by the one to one model). Note that if
2748 * sack_delay or sack_freq are 0 when setting this option, then the
2749 * current values will remain unchanged.
2751 * struct sctp_sack_info {
2752 * sctp_assoc_t sack_assoc_id;
2753 * uint32_t sack_delay;
2754 * uint32_t sack_freq;
2757 * sack_assoc_id - This parameter, indicates which association the user
2758 * is performing an action upon. Note that if this field's value is
2759 * zero then the endpoints default value is changed (effecting future
2760 * associations only).
2762 * sack_delay - This parameter contains the number of milliseconds that
2763 * the user is requesting the delayed ACK timer be set to. Note that
2764 * this value is defined in the standard to be between 200 and 500
2767 * sack_freq - This parameter contains the number of packets that must
2768 * be received before a sack is sent without waiting for the delay
2769 * timer to expire. The default value for this is 2, setting this
2770 * value to 1 will disable the delayed sack algorithm.
2772 static int __sctp_setsockopt_delayed_ack(struct sock *sk,
2773 struct sctp_sack_info *params)
2775 struct sctp_sock *sp = sctp_sk(sk);
2776 struct sctp_association *asoc;
2778 /* Validate value parameter. */
2779 if (params->sack_delay > 500)
2782 /* Get association, if sack_assoc_id != SCTP_FUTURE_ASSOC and the
2783 * socket is a one to many style socket, and an association
2784 * was not found, then the id was invalid.
2786 asoc = sctp_id2assoc(sk, params->sack_assoc_id);
2787 if (!asoc && params->sack_assoc_id > SCTP_ALL_ASSOC &&
2788 sctp_style(sk, UDP))
2792 sctp_apply_asoc_delayed_ack(params, asoc);
2797 if (sctp_style(sk, TCP))
2798 params->sack_assoc_id = SCTP_FUTURE_ASSOC;
2800 if (params->sack_assoc_id == SCTP_FUTURE_ASSOC ||
2801 params->sack_assoc_id == SCTP_ALL_ASSOC) {
2802 if (params->sack_delay) {
2803 sp->sackdelay = params->sack_delay;
2805 sctp_spp_sackdelay_enable(sp->param_flags);
2807 if (params->sack_freq == 1) {
2809 sctp_spp_sackdelay_disable(sp->param_flags);
2810 } else if (params->sack_freq > 1) {
2811 sp->sackfreq = params->sack_freq;
2813 sctp_spp_sackdelay_enable(sp->param_flags);
2817 if (params->sack_assoc_id == SCTP_CURRENT_ASSOC ||
2818 params->sack_assoc_id == SCTP_ALL_ASSOC)
2819 list_for_each_entry(asoc, &sp->ep->asocs, asocs)
2820 sctp_apply_asoc_delayed_ack(params, asoc);
2825 static int sctp_setsockopt_delayed_ack(struct sock *sk,
2826 struct sctp_sack_info *params,
2827 unsigned int optlen)
2829 if (optlen == sizeof(struct sctp_assoc_value)) {
2830 struct sctp_assoc_value *v = (struct sctp_assoc_value *)params;
2831 struct sctp_sack_info p;
2833 pr_warn_ratelimited(DEPRECATED
2835 "Use of struct sctp_assoc_value in delayed_ack socket option.\n"
2836 "Use struct sctp_sack_info instead\n",
2837 current->comm, task_pid_nr(current));
2839 p.sack_assoc_id = v->assoc_id;
2840 p.sack_delay = v->assoc_value;
2841 p.sack_freq = v->assoc_value ? 0 : 1;
2842 return __sctp_setsockopt_delayed_ack(sk, &p);
2845 if (optlen != sizeof(struct sctp_sack_info))
2847 if (params->sack_delay == 0 && params->sack_freq == 0)
2849 return __sctp_setsockopt_delayed_ack(sk, params);
2852 /* 7.1.3 Initialization Parameters (SCTP_INITMSG)
2854 * Applications can specify protocol parameters for the default association
2855 * initialization. The option name argument to setsockopt() and getsockopt()
2858 * Setting initialization parameters is effective only on an unconnected
2859 * socket (for UDP-style sockets only future associations are effected
2860 * by the change). With TCP-style sockets, this option is inherited by
2861 * sockets derived from a listener socket.
2863 static int sctp_setsockopt_initmsg(struct sock *sk, struct sctp_initmsg *sinit,
2864 unsigned int optlen)
2866 struct sctp_sock *sp = sctp_sk(sk);
2868 if (optlen != sizeof(struct sctp_initmsg))
2871 if (sinit->sinit_num_ostreams)
2872 sp->initmsg.sinit_num_ostreams = sinit->sinit_num_ostreams;
2873 if (sinit->sinit_max_instreams)
2874 sp->initmsg.sinit_max_instreams = sinit->sinit_max_instreams;
2875 if (sinit->sinit_max_attempts)
2876 sp->initmsg.sinit_max_attempts = sinit->sinit_max_attempts;
2877 if (sinit->sinit_max_init_timeo)
2878 sp->initmsg.sinit_max_init_timeo = sinit->sinit_max_init_timeo;
2884 * 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM)
2886 * Applications that wish to use the sendto() system call may wish to
2887 * specify a default set of parameters that would normally be supplied
2888 * through the inclusion of ancillary data. This socket option allows
2889 * such an application to set the default sctp_sndrcvinfo structure.
2890 * The application that wishes to use this socket option simply passes
2891 * in to this call the sctp_sndrcvinfo structure defined in Section
2892 * 5.2.2) The input parameters accepted by this call include
2893 * sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context,
2894 * sinfo_timetolive. The user must provide the sinfo_assoc_id field in
2895 * to this call if the caller is using the UDP model.
2897 static int sctp_setsockopt_default_send_param(struct sock *sk,
2898 struct sctp_sndrcvinfo *info,
2899 unsigned int optlen)
2901 struct sctp_sock *sp = sctp_sk(sk);
2902 struct sctp_association *asoc;
2904 if (optlen != sizeof(*info))
2906 if (info->sinfo_flags &
2907 ~(SCTP_UNORDERED | SCTP_ADDR_OVER |
2908 SCTP_ABORT | SCTP_EOF))
2911 asoc = sctp_id2assoc(sk, info->sinfo_assoc_id);
2912 if (!asoc && info->sinfo_assoc_id > SCTP_ALL_ASSOC &&
2913 sctp_style(sk, UDP))
2917 asoc->default_stream = info->sinfo_stream;
2918 asoc->default_flags = info->sinfo_flags;
2919 asoc->default_ppid = info->sinfo_ppid;
2920 asoc->default_context = info->sinfo_context;
2921 asoc->default_timetolive = info->sinfo_timetolive;
2926 if (sctp_style(sk, TCP))
2927 info->sinfo_assoc_id = SCTP_FUTURE_ASSOC;
2929 if (info->sinfo_assoc_id == SCTP_FUTURE_ASSOC ||
2930 info->sinfo_assoc_id == SCTP_ALL_ASSOC) {
2931 sp->default_stream = info->sinfo_stream;
2932 sp->default_flags = info->sinfo_flags;
2933 sp->default_ppid = info->sinfo_ppid;
2934 sp->default_context = info->sinfo_context;
2935 sp->default_timetolive = info->sinfo_timetolive;
2938 if (info->sinfo_assoc_id == SCTP_CURRENT_ASSOC ||
2939 info->sinfo_assoc_id == SCTP_ALL_ASSOC) {
2940 list_for_each_entry(asoc, &sp->ep->asocs, asocs) {
2941 asoc->default_stream = info->sinfo_stream;
2942 asoc->default_flags = info->sinfo_flags;
2943 asoc->default_ppid = info->sinfo_ppid;
2944 asoc->default_context = info->sinfo_context;
2945 asoc->default_timetolive = info->sinfo_timetolive;
2952 /* RFC6458, Section 8.1.31. Set/get Default Send Parameters
2953 * (SCTP_DEFAULT_SNDINFO)
2955 static int sctp_setsockopt_default_sndinfo(struct sock *sk,
2956 struct sctp_sndinfo *info,
2957 unsigned int optlen)
2959 struct sctp_sock *sp = sctp_sk(sk);
2960 struct sctp_association *asoc;
2962 if (optlen != sizeof(*info))
2964 if (info->snd_flags &
2965 ~(SCTP_UNORDERED | SCTP_ADDR_OVER |
2966 SCTP_ABORT | SCTP_EOF))
2969 asoc = sctp_id2assoc(sk, info->snd_assoc_id);
2970 if (!asoc && info->snd_assoc_id > SCTP_ALL_ASSOC &&
2971 sctp_style(sk, UDP))
2975 asoc->default_stream = info->snd_sid;
2976 asoc->default_flags = info->snd_flags;
2977 asoc->default_ppid = info->snd_ppid;
2978 asoc->default_context = info->snd_context;
2983 if (sctp_style(sk, TCP))
2984 info->snd_assoc_id = SCTP_FUTURE_ASSOC;
2986 if (info->snd_assoc_id == SCTP_FUTURE_ASSOC ||
2987 info->snd_assoc_id == SCTP_ALL_ASSOC) {
2988 sp->default_stream = info->snd_sid;
2989 sp->default_flags = info->snd_flags;
2990 sp->default_ppid = info->snd_ppid;
2991 sp->default_context = info->snd_context;
2994 if (info->snd_assoc_id == SCTP_CURRENT_ASSOC ||
2995 info->snd_assoc_id == SCTP_ALL_ASSOC) {
2996 list_for_each_entry(asoc, &sp->ep->asocs, asocs) {
2997 asoc->default_stream = info->snd_sid;
2998 asoc->default_flags = info->snd_flags;
2999 asoc->default_ppid = info->snd_ppid;
3000 asoc->default_context = info->snd_context;
3007 /* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
3009 * Requests that the local SCTP stack use the enclosed peer address as
3010 * the association primary. The enclosed address must be one of the
3011 * association peer's addresses.
3013 static int sctp_setsockopt_primary_addr(struct sock *sk, struct sctp_prim *prim,
3014 unsigned int optlen)
3016 struct sctp_transport *trans;
3020 if (optlen != sizeof(struct sctp_prim))
3023 /* Allow security module to validate address but need address len. */
3024 af = sctp_get_af_specific(prim->ssp_addr.ss_family);
3028 err = security_sctp_bind_connect(sk, SCTP_PRIMARY_ADDR,
3029 (struct sockaddr *)&prim->ssp_addr,
3034 trans = sctp_addr_id2transport(sk, &prim->ssp_addr, prim->ssp_assoc_id);
3038 sctp_assoc_set_primary(trans->asoc, trans);
3044 * 7.1.5 SCTP_NODELAY
3046 * Turn on/off any Nagle-like algorithm. This means that packets are
3047 * generally sent as soon as possible and no unnecessary delays are
3048 * introduced, at the cost of more packets in the network. Expects an
3049 * integer boolean flag.
3051 static int sctp_setsockopt_nodelay(struct sock *sk, int *val,
3052 unsigned int optlen)
3054 if (optlen < sizeof(int))
3056 sctp_sk(sk)->nodelay = (*val == 0) ? 0 : 1;
3062 * 7.1.1 SCTP_RTOINFO
3064 * The protocol parameters used to initialize and bound retransmission
3065 * timeout (RTO) are tunable. sctp_rtoinfo structure is used to access
3066 * and modify these parameters.
3067 * All parameters are time values, in milliseconds. A value of 0, when
3068 * modifying the parameters, indicates that the current value should not
3072 static int sctp_setsockopt_rtoinfo(struct sock *sk,
3073 struct sctp_rtoinfo *rtoinfo,
3074 unsigned int optlen)
3076 struct sctp_association *asoc;
3077 unsigned long rto_min, rto_max;
3078 struct sctp_sock *sp = sctp_sk(sk);
3080 if (optlen != sizeof (struct sctp_rtoinfo))
3083 asoc = sctp_id2assoc(sk, rtoinfo->srto_assoc_id);
3085 /* Set the values to the specific association */
3086 if (!asoc && rtoinfo->srto_assoc_id != SCTP_FUTURE_ASSOC &&
3087 sctp_style(sk, UDP))
3090 rto_max = rtoinfo->srto_max;
3091 rto_min = rtoinfo->srto_min;
3094 rto_max = asoc ? msecs_to_jiffies(rto_max) : rto_max;
3096 rto_max = asoc ? asoc->rto_max : sp->rtoinfo.srto_max;
3099 rto_min = asoc ? msecs_to_jiffies(rto_min) : rto_min;
3101 rto_min = asoc ? asoc->rto_min : sp->rtoinfo.srto_min;
3103 if (rto_min > rto_max)
3107 if (rtoinfo->srto_initial != 0)
3109 msecs_to_jiffies(rtoinfo->srto_initial);
3110 asoc->rto_max = rto_max;
3111 asoc->rto_min = rto_min;
3113 /* If there is no association or the association-id = 0
3114 * set the values to the endpoint.
3116 if (rtoinfo->srto_initial != 0)
3117 sp->rtoinfo.srto_initial = rtoinfo->srto_initial;
3118 sp->rtoinfo.srto_max = rto_max;
3119 sp->rtoinfo.srto_min = rto_min;
3127 * 7.1.2 SCTP_ASSOCINFO
3129 * This option is used to tune the maximum retransmission attempts
3130 * of the association.
3131 * Returns an error if the new association retransmission value is
3132 * greater than the sum of the retransmission value of the peer.
3133 * See [SCTP] for more information.
3136 static int sctp_setsockopt_associnfo(struct sock *sk,
3137 struct sctp_assocparams *assocparams,
3138 unsigned int optlen)
3141 struct sctp_association *asoc;
3143 if (optlen != sizeof(struct sctp_assocparams))
3146 asoc = sctp_id2assoc(sk, assocparams->sasoc_assoc_id);
3148 if (!asoc && assocparams->sasoc_assoc_id != SCTP_FUTURE_ASSOC &&
3149 sctp_style(sk, UDP))
3152 /* Set the values to the specific association */
3154 if (assocparams->sasoc_asocmaxrxt != 0) {
3157 struct sctp_transport *peer_addr;
3159 list_for_each_entry(peer_addr, &asoc->peer.transport_addr_list,
3161 path_sum += peer_addr->pathmaxrxt;
3165 /* Only validate asocmaxrxt if we have more than
3166 * one path/transport. We do this because path
3167 * retransmissions are only counted when we have more
3171 assocparams->sasoc_asocmaxrxt > path_sum)
3174 asoc->max_retrans = assocparams->sasoc_asocmaxrxt;
3177 if (assocparams->sasoc_cookie_life != 0)
3179 ms_to_ktime(assocparams->sasoc_cookie_life);
3181 /* Set the values to the endpoint */
3182 struct sctp_sock *sp = sctp_sk(sk);
3184 if (assocparams->sasoc_asocmaxrxt != 0)
3185 sp->assocparams.sasoc_asocmaxrxt =
3186 assocparams->sasoc_asocmaxrxt;
3187 if (assocparams->sasoc_cookie_life != 0)
3188 sp->assocparams.sasoc_cookie_life =
3189 assocparams->sasoc_cookie_life;
3195 * 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR)
3197 * This socket option is a boolean flag which turns on or off mapped V4
3198 * addresses. If this option is turned on and the socket is type
3199 * PF_INET6, then IPv4 addresses will be mapped to V6 representation.
3200 * If this option is turned off, then no mapping will be done of V4
3201 * addresses and a user will receive both PF_INET6 and PF_INET type
3202 * addresses on the socket.
3204 static int sctp_setsockopt_mappedv4(struct sock *sk, int *val,
3205 unsigned int optlen)
3207 struct sctp_sock *sp = sctp_sk(sk);
3209 if (optlen < sizeof(int))
3220 * 8.1.16. Get or Set the Maximum Fragmentation Size (SCTP_MAXSEG)
3221 * This option will get or set the maximum size to put in any outgoing
3222 * SCTP DATA chunk. If a message is larger than this size it will be
3223 * fragmented by SCTP into the specified size. Note that the underlying
3224 * SCTP implementation may fragment into smaller sized chunks when the
3225 * PMTU of the underlying association is smaller than the value set by
3226 * the user. The default value for this option is '0' which indicates
3227 * the user is NOT limiting fragmentation and only the PMTU will effect
3228 * SCTP's choice of DATA chunk size. Note also that values set larger
3229 * than the maximum size of an IP datagram will effectively let SCTP
3230 * control fragmentation (i.e. the same as setting this option to 0).
3232 * The following structure is used to access and modify this parameter:
3234 * struct sctp_assoc_value {
3235 * sctp_assoc_t assoc_id;
3236 * uint32_t assoc_value;
3239 * assoc_id: This parameter is ignored for one-to-one style sockets.
3240 * For one-to-many style sockets this parameter indicates which
3241 * association the user is performing an action upon. Note that if
3242 * this field's value is zero then the endpoints default value is
3243 * changed (effecting future associations only).
3244 * assoc_value: This parameter specifies the maximum size in bytes.
3246 static int sctp_setsockopt_maxseg(struct sock *sk,
3247 struct sctp_assoc_value *params,
3248 unsigned int optlen)
3250 struct sctp_sock *sp = sctp_sk(sk);
3251 struct sctp_association *asoc;
3252 sctp_assoc_t assoc_id;
3255 if (optlen == sizeof(int)) {
3256 pr_warn_ratelimited(DEPRECATED
3258 "Use of int in maxseg socket option.\n"
3259 "Use struct sctp_assoc_value instead\n",
3260 current->comm, task_pid_nr(current));
3261 assoc_id = SCTP_FUTURE_ASSOC;
3262 val = *(int *)params;
3263 } else if (optlen == sizeof(struct sctp_assoc_value)) {
3264 assoc_id = params->assoc_id;
3265 val = params->assoc_value;
3270 asoc = sctp_id2assoc(sk, assoc_id);
3271 if (!asoc && assoc_id != SCTP_FUTURE_ASSOC &&
3272 sctp_style(sk, UDP))
3276 int min_len, max_len;
3277 __u16 datasize = asoc ? sctp_datachk_len(&asoc->stream) :
3278 sizeof(struct sctp_data_chunk);
3280 min_len = sctp_min_frag_point(sp, datasize);
3281 max_len = SCTP_MAX_CHUNK_LEN - datasize;
3283 if (val < min_len || val > max_len)
3288 asoc->user_frag = val;
3289 sctp_assoc_update_frag_point(asoc);
3291 sp->user_frag = val;
3299 * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR)
3301 * Requests that the peer mark the enclosed address as the association
3302 * primary. The enclosed address must be one of the association's
3303 * locally bound addresses. The following structure is used to make a
3304 * set primary request:
3306 static int sctp_setsockopt_peer_primary_addr(struct sock *sk,
3307 struct sctp_setpeerprim *prim,
3308 unsigned int optlen)
3310 struct sctp_sock *sp;
3311 struct sctp_association *asoc = NULL;
3312 struct sctp_chunk *chunk;
3318 if (!sp->ep->asconf_enable)
3321 if (optlen != sizeof(struct sctp_setpeerprim))
3324 asoc = sctp_id2assoc(sk, prim->sspp_assoc_id);
3328 if (!asoc->peer.asconf_capable)
3331 if (asoc->peer.addip_disabled_mask & SCTP_PARAM_SET_PRIMARY)
3334 if (!sctp_state(asoc, ESTABLISHED))
3337 af = sctp_get_af_specific(prim->sspp_addr.ss_family);
3341 if (!af->addr_valid((union sctp_addr *)&prim->sspp_addr, sp, NULL))
3342 return -EADDRNOTAVAIL;
3344 if (!sctp_assoc_lookup_laddr(asoc, (union sctp_addr *)&prim->sspp_addr))
3345 return -EADDRNOTAVAIL;
3347 /* Allow security module to validate address. */
3348 err = security_sctp_bind_connect(sk, SCTP_SET_PEER_PRIMARY_ADDR,
3349 (struct sockaddr *)&prim->sspp_addr,
3354 /* Create an ASCONF chunk with SET_PRIMARY parameter */
3355 chunk = sctp_make_asconf_set_prim(asoc,
3356 (union sctp_addr *)&prim->sspp_addr);
3360 err = sctp_send_asconf(asoc, chunk);
3362 pr_debug("%s: we set peer primary addr primitively\n", __func__);
3367 static int sctp_setsockopt_adaptation_layer(struct sock *sk,
3368 struct sctp_setadaptation *adapt,
3369 unsigned int optlen)
3371 if (optlen != sizeof(struct sctp_setadaptation))
3374 sctp_sk(sk)->adaptation_ind = adapt->ssb_adaptation_ind;
3380 * 7.1.29. Set or Get the default context (SCTP_CONTEXT)
3382 * The context field in the sctp_sndrcvinfo structure is normally only
3383 * used when a failed message is retrieved holding the value that was
3384 * sent down on the actual send call. This option allows the setting of
3385 * a default context on an association basis that will be received on
3386 * reading messages from the peer. This is especially helpful in the
3387 * one-2-many model for an application to keep some reference to an
3388 * internal state machine that is processing messages on the
3389 * association. Note that the setting of this value only effects
3390 * received messages from the peer and does not effect the value that is
3391 * saved with outbound messages.
3393 static int sctp_setsockopt_context(struct sock *sk,
3394 struct sctp_assoc_value *params,
3395 unsigned int optlen)
3397 struct sctp_sock *sp = sctp_sk(sk);
3398 struct sctp_association *asoc;
3400 if (optlen != sizeof(struct sctp_assoc_value))
3403 asoc = sctp_id2assoc(sk, params->assoc_id);
3404 if (!asoc && params->assoc_id > SCTP_ALL_ASSOC &&
3405 sctp_style(sk, UDP))
3409 asoc->default_rcv_context = params->assoc_value;
3414 if (sctp_style(sk, TCP))
3415 params->assoc_id = SCTP_FUTURE_ASSOC;
3417 if (params->assoc_id == SCTP_FUTURE_ASSOC ||
3418 params->assoc_id == SCTP_ALL_ASSOC)
3419 sp->default_rcv_context = params->assoc_value;
3421 if (params->assoc_id == SCTP_CURRENT_ASSOC ||
3422 params->assoc_id == SCTP_ALL_ASSOC)
3423 list_for_each_entry(asoc, &sp->ep->asocs, asocs)
3424 asoc->default_rcv_context = params->assoc_value;
3430 * 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE)
3432 * This options will at a minimum specify if the implementation is doing
3433 * fragmented interleave. Fragmented interleave, for a one to many
3434 * socket, is when subsequent calls to receive a message may return
3435 * parts of messages from different associations. Some implementations
3436 * may allow you to turn this value on or off. If so, when turned off,
3437 * no fragment interleave will occur (which will cause a head of line
3438 * blocking amongst multiple associations sharing the same one to many
3439 * socket). When this option is turned on, then each receive call may
3440 * come from a different association (thus the user must receive data
3441 * with the extended calls (e.g. sctp_recvmsg) to keep track of which
3442 * association each receive belongs to.
3444 * This option takes a boolean value. A non-zero value indicates that
3445 * fragmented interleave is on. A value of zero indicates that
3446 * fragmented interleave is off.
3448 * Note that it is important that an implementation that allows this
3449 * option to be turned on, have it off by default. Otherwise an unaware
3450 * application using the one to many model may become confused and act
3453 static int sctp_setsockopt_fragment_interleave(struct sock *sk, int *val,
3454 unsigned int optlen)
3456 if (optlen != sizeof(int))
3459 sctp_sk(sk)->frag_interleave = !!*val;
3461 if (!sctp_sk(sk)->frag_interleave)
3462 sctp_sk(sk)->ep->intl_enable = 0;
3468 * 8.1.21. Set or Get the SCTP Partial Delivery Point
3469 * (SCTP_PARTIAL_DELIVERY_POINT)
3471 * This option will set or get the SCTP partial delivery point. This
3472 * point is the size of a message where the partial delivery API will be
3473 * invoked to help free up rwnd space for the peer. Setting this to a
3474 * lower value will cause partial deliveries to happen more often. The
3475 * calls argument is an integer that sets or gets the partial delivery
3476 * point. Note also that the call will fail if the user attempts to set
3477 * this value larger than the socket receive buffer size.
3479 * Note that any single message having a length smaller than or equal to
3480 * the SCTP partial delivery point will be delivered in one single read
3481 * call as long as the user provided buffer is large enough to hold the
3484 static int sctp_setsockopt_partial_delivery_point(struct sock *sk, u32 *val,
3485 unsigned int optlen)
3487 if (optlen != sizeof(u32))
3490 /* Note: We double the receive buffer from what the user sets
3491 * it to be, also initial rwnd is based on rcvbuf/2.
3493 if (*val > (sk->sk_rcvbuf >> 1))
3496 sctp_sk(sk)->pd_point = *val;
3498 return 0; /* is this the right error code? */
3502 * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST)
3504 * This option will allow a user to change the maximum burst of packets
3505 * that can be emitted by this association. Note that the default value
3506 * is 4, and some implementations may restrict this setting so that it
3507 * can only be lowered.
3509 * NOTE: This text doesn't seem right. Do this on a socket basis with
3510 * future associations inheriting the socket value.
3512 static int sctp_setsockopt_maxburst(struct sock *sk,
3513 struct sctp_assoc_value *params,
3514 unsigned int optlen)
3516 struct sctp_sock *sp = sctp_sk(sk);
3517 struct sctp_association *asoc;
3518 sctp_assoc_t assoc_id;
3521 if (optlen == sizeof(int)) {
3522 pr_warn_ratelimited(DEPRECATED
3524 "Use of int in max_burst socket option deprecated.\n"
3525 "Use struct sctp_assoc_value instead\n",
3526 current->comm, task_pid_nr(current));
3527 assoc_id = SCTP_FUTURE_ASSOC;
3528 assoc_value = *((int *)params);
3529 } else if (optlen == sizeof(struct sctp_assoc_value)) {
3530 assoc_id = params->assoc_id;
3531 assoc_value = params->assoc_value;
3535 asoc = sctp_id2assoc(sk, assoc_id);
3536 if (!asoc && assoc_id > SCTP_ALL_ASSOC && sctp_style(sk, UDP))
3540 asoc->max_burst = assoc_value;
3545 if (sctp_style(sk, TCP))
3546 assoc_id = SCTP_FUTURE_ASSOC;
3548 if (assoc_id == SCTP_FUTURE_ASSOC || assoc_id == SCTP_ALL_ASSOC)
3549 sp->max_burst = assoc_value;
3551 if (assoc_id == SCTP_CURRENT_ASSOC || assoc_id == SCTP_ALL_ASSOC)
3552 list_for_each_entry(asoc, &sp->ep->asocs, asocs)
3553 asoc->max_burst = assoc_value;
3559 * 7.1.18. Add a chunk that must be authenticated (SCTP_AUTH_CHUNK)
3561 * This set option adds a chunk type that the user is requesting to be
3562 * received only in an authenticated way. Changes to the list of chunks
3563 * will only effect future associations on the socket.
3565 static int sctp_setsockopt_auth_chunk(struct sock *sk,
3566 struct sctp_authchunk *val,
3567 unsigned int optlen)
3569 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
3571 if (!ep->auth_enable)
3574 if (optlen != sizeof(struct sctp_authchunk))
3577 switch (val->sauth_chunk) {
3579 case SCTP_CID_INIT_ACK:
3580 case SCTP_CID_SHUTDOWN_COMPLETE:
3585 /* add this chunk id to the endpoint */
3586 return sctp_auth_ep_add_chunkid(ep, val->sauth_chunk);
3590 * 7.1.19. Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT)
3592 * This option gets or sets the list of HMAC algorithms that the local
3593 * endpoint requires the peer to use.
3595 static int sctp_setsockopt_hmac_ident(struct sock *sk,
3596 struct sctp_hmacalgo *hmacs,
3597 unsigned int optlen)
3599 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
3602 if (!ep->auth_enable)
3605 if (optlen < sizeof(struct sctp_hmacalgo))
3607 optlen = min_t(unsigned int, optlen, sizeof(struct sctp_hmacalgo) +
3608 SCTP_AUTH_NUM_HMACS * sizeof(u16));
3610 idents = hmacs->shmac_num_idents;
3611 if (idents == 0 || idents > SCTP_AUTH_NUM_HMACS ||
3612 (idents * sizeof(u16)) > (optlen - sizeof(struct sctp_hmacalgo)))
3615 return sctp_auth_ep_set_hmacs(ep, hmacs);
3619 * 7.1.20. Set a shared key (SCTP_AUTH_KEY)
3621 * This option will set a shared secret key which is used to build an
3622 * association shared key.
3624 static int sctp_setsockopt_auth_key(struct sock *sk,
3625 struct sctp_authkey *authkey,
3626 unsigned int optlen)
3628 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
3629 struct sctp_association *asoc;
3632 if (optlen <= sizeof(struct sctp_authkey))
3634 /* authkey->sca_keylength is u16, so optlen can't be bigger than
3637 optlen = min_t(unsigned int, optlen, USHRT_MAX + sizeof(*authkey));
3639 if (authkey->sca_keylength > optlen - sizeof(*authkey))
3642 asoc = sctp_id2assoc(sk, authkey->sca_assoc_id);
3643 if (!asoc && authkey->sca_assoc_id > SCTP_ALL_ASSOC &&
3644 sctp_style(sk, UDP))
3648 ret = sctp_auth_set_key(ep, asoc, authkey);
3652 if (sctp_style(sk, TCP))
3653 authkey->sca_assoc_id = SCTP_FUTURE_ASSOC;
3655 if (authkey->sca_assoc_id == SCTP_FUTURE_ASSOC ||
3656 authkey->sca_assoc_id == SCTP_ALL_ASSOC) {
3657 ret = sctp_auth_set_key(ep, asoc, authkey);
3664 if (authkey->sca_assoc_id == SCTP_CURRENT_ASSOC ||
3665 authkey->sca_assoc_id == SCTP_ALL_ASSOC) {
3666 list_for_each_entry(asoc, &ep->asocs, asocs) {
3667 int res = sctp_auth_set_key(ep, asoc, authkey);
3675 memzero_explicit(authkey, optlen);
3680 * 7.1.21. Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY)
3682 * This option will get or set the active shared key to be used to build
3683 * the association shared key.
3685 static int sctp_setsockopt_active_key(struct sock *sk,
3686 struct sctp_authkeyid *val,
3687 unsigned int optlen)
3689 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
3690 struct sctp_association *asoc;
3693 if (optlen != sizeof(struct sctp_authkeyid))
3696 asoc = sctp_id2assoc(sk, val->scact_assoc_id);
3697 if (!asoc && val->scact_assoc_id > SCTP_ALL_ASSOC &&
3698 sctp_style(sk, UDP))
3702 return sctp_auth_set_active_key(ep, asoc, val->scact_keynumber);
3704 if (sctp_style(sk, TCP))
3705 val->scact_assoc_id = SCTP_FUTURE_ASSOC;
3707 if (val->scact_assoc_id == SCTP_FUTURE_ASSOC ||
3708 val->scact_assoc_id == SCTP_ALL_ASSOC) {
3709 ret = sctp_auth_set_active_key(ep, asoc, val->scact_keynumber);
3714 if (val->scact_assoc_id == SCTP_CURRENT_ASSOC ||
3715 val->scact_assoc_id == SCTP_ALL_ASSOC) {
3716 list_for_each_entry(asoc, &ep->asocs, asocs) {
3717 int res = sctp_auth_set_active_key(ep, asoc,
3718 val->scact_keynumber);
3729 * 7.1.22. Delete a shared key (SCTP_AUTH_DELETE_KEY)
3731 * This set option will delete a shared secret key from use.
3733 static int sctp_setsockopt_del_key(struct sock *sk,
3734 struct sctp_authkeyid *val,
3735 unsigned int optlen)
3737 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
3738 struct sctp_association *asoc;
3741 if (optlen != sizeof(struct sctp_authkeyid))
3744 asoc = sctp_id2assoc(sk, val->scact_assoc_id);
3745 if (!asoc && val->scact_assoc_id > SCTP_ALL_ASSOC &&
3746 sctp_style(sk, UDP))
3750 return sctp_auth_del_key_id(ep, asoc, val->scact_keynumber);
3752 if (sctp_style(sk, TCP))
3753 val->scact_assoc_id = SCTP_FUTURE_ASSOC;
3755 if (val->scact_assoc_id == SCTP_FUTURE_ASSOC ||
3756 val->scact_assoc_id == SCTP_ALL_ASSOC) {
3757 ret = sctp_auth_del_key_id(ep, asoc, val->scact_keynumber);
3762 if (val->scact_assoc_id == SCTP_CURRENT_ASSOC ||
3763 val->scact_assoc_id == SCTP_ALL_ASSOC) {
3764 list_for_each_entry(asoc, &ep->asocs, asocs) {
3765 int res = sctp_auth_del_key_id(ep, asoc,
3766 val->scact_keynumber);
3777 * 8.3.4 Deactivate a Shared Key (SCTP_AUTH_DEACTIVATE_KEY)
3779 * This set option will deactivate a shared secret key.
3781 static int sctp_setsockopt_deactivate_key(struct sock *sk,
3782 struct sctp_authkeyid *val,
3783 unsigned int optlen)
3785 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
3786 struct sctp_association *asoc;
3789 if (optlen != sizeof(struct sctp_authkeyid))
3792 asoc = sctp_id2assoc(sk, val->scact_assoc_id);
3793 if (!asoc && val->scact_assoc_id > SCTP_ALL_ASSOC &&
3794 sctp_style(sk, UDP))
3798 return sctp_auth_deact_key_id(ep, asoc, val->scact_keynumber);
3800 if (sctp_style(sk, TCP))
3801 val->scact_assoc_id = SCTP_FUTURE_ASSOC;
3803 if (val->scact_assoc_id == SCTP_FUTURE_ASSOC ||
3804 val->scact_assoc_id == SCTP_ALL_ASSOC) {
3805 ret = sctp_auth_deact_key_id(ep, asoc, val->scact_keynumber);
3810 if (val->scact_assoc_id == SCTP_CURRENT_ASSOC ||
3811 val->scact_assoc_id == SCTP_ALL_ASSOC) {
3812 list_for_each_entry(asoc, &ep->asocs, asocs) {
3813 int res = sctp_auth_deact_key_id(ep, asoc,
3814 val->scact_keynumber);
3825 * 8.1.23 SCTP_AUTO_ASCONF
3827 * This option will enable or disable the use of the automatic generation of
3828 * ASCONF chunks to add and delete addresses to an existing association. Note
3829 * that this option has two caveats namely: a) it only affects sockets that
3830 * are bound to all addresses available to the SCTP stack, and b) the system
3831 * administrator may have an overriding control that turns the ASCONF feature
3832 * off no matter what setting the socket option may have.
3833 * This option expects an integer boolean flag, where a non-zero value turns on
3834 * the option, and a zero value turns off the option.
3835 * Note. In this implementation, socket operation overrides default parameter
3836 * being set by sysctl as well as FreeBSD implementation
3838 static int sctp_setsockopt_auto_asconf(struct sock *sk, int *val,
3839 unsigned int optlen)
3841 struct sctp_sock *sp = sctp_sk(sk);
3843 if (optlen < sizeof(int))
3845 if (!sctp_is_ep_boundall(sk) && *val)
3847 if ((*val && sp->do_auto_asconf) || (!*val && !sp->do_auto_asconf))
3850 spin_lock_bh(&sock_net(sk)->sctp.addr_wq_lock);
3851 if (*val == 0 && sp->do_auto_asconf) {
3852 list_del(&sp->auto_asconf_list);
3853 sp->do_auto_asconf = 0;
3854 } else if (*val && !sp->do_auto_asconf) {
3855 list_add_tail(&sp->auto_asconf_list,
3856 &sock_net(sk)->sctp.auto_asconf_splist);
3857 sp->do_auto_asconf = 1;
3859 spin_unlock_bh(&sock_net(sk)->sctp.addr_wq_lock);
3864 * SCTP_PEER_ADDR_THLDS
3866 * This option allows us to alter the partially failed threshold for one or all
3867 * transports in an association. See Section 6.1 of:
3868 * http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txt
3870 static int sctp_setsockopt_paddr_thresholds(struct sock *sk,
3871 struct sctp_paddrthlds_v2 *val,
3872 unsigned int optlen, bool v2)
3874 struct sctp_transport *trans;
3875 struct sctp_association *asoc;
3878 len = v2 ? sizeof(*val) : sizeof(struct sctp_paddrthlds);
3882 if (v2 && val->spt_pathpfthld > val->spt_pathcpthld)
3885 if (!sctp_is_any(sk, (const union sctp_addr *)&val->spt_address)) {
3886 trans = sctp_addr_id2transport(sk, &val->spt_address,
3891 if (val->spt_pathmaxrxt)
3892 trans->pathmaxrxt = val->spt_pathmaxrxt;
3894 trans->ps_retrans = val->spt_pathcpthld;
3895 trans->pf_retrans = val->spt_pathpfthld;
3900 asoc = sctp_id2assoc(sk, val->spt_assoc_id);
3901 if (!asoc && val->spt_assoc_id != SCTP_FUTURE_ASSOC &&
3902 sctp_style(sk, UDP))
3906 list_for_each_entry(trans, &asoc->peer.transport_addr_list,
3908 if (val->spt_pathmaxrxt)
3909 trans->pathmaxrxt = val->spt_pathmaxrxt;
3911 trans->ps_retrans = val->spt_pathcpthld;
3912 trans->pf_retrans = val->spt_pathpfthld;
3915 if (val->spt_pathmaxrxt)
3916 asoc->pathmaxrxt = val->spt_pathmaxrxt;
3918 asoc->ps_retrans = val->spt_pathcpthld;
3919 asoc->pf_retrans = val->spt_pathpfthld;
3921 struct sctp_sock *sp = sctp_sk(sk);
3923 if (val->spt_pathmaxrxt)
3924 sp->pathmaxrxt = val->spt_pathmaxrxt;
3926 sp->ps_retrans = val->spt_pathcpthld;
3927 sp->pf_retrans = val->spt_pathpfthld;
3933 static int sctp_setsockopt_recvrcvinfo(struct sock *sk, int *val,
3934 unsigned int optlen)
3936 if (optlen < sizeof(int))
3939 sctp_sk(sk)->recvrcvinfo = (*val == 0) ? 0 : 1;
3944 static int sctp_setsockopt_recvnxtinfo(struct sock *sk, int *val,
3945 unsigned int optlen)
3947 if (optlen < sizeof(int))
3950 sctp_sk(sk)->recvnxtinfo = (*val == 0) ? 0 : 1;
3955 static int sctp_setsockopt_pr_supported(struct sock *sk,
3956 struct sctp_assoc_value *params,
3957 unsigned int optlen)
3959 struct sctp_association *asoc;
3961 if (optlen != sizeof(*params))
3964 asoc = sctp_id2assoc(sk, params->assoc_id);
3965 if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC &&
3966 sctp_style(sk, UDP))
3969 sctp_sk(sk)->ep->prsctp_enable = !!params->assoc_value;
3974 static int sctp_setsockopt_default_prinfo(struct sock *sk,
3975 struct sctp_default_prinfo *info,
3976 unsigned int optlen)
3978 struct sctp_sock *sp = sctp_sk(sk);
3979 struct sctp_association *asoc;
3980 int retval = -EINVAL;
3982 if (optlen != sizeof(*info))
3985 if (info->pr_policy & ~SCTP_PR_SCTP_MASK)
3988 if (info->pr_policy == SCTP_PR_SCTP_NONE)
3991 asoc = sctp_id2assoc(sk, info->pr_assoc_id);
3992 if (!asoc && info->pr_assoc_id > SCTP_ALL_ASSOC &&
3993 sctp_style(sk, UDP))
3999 SCTP_PR_SET_POLICY(asoc->default_flags, info->pr_policy);
4000 asoc->default_timetolive = info->pr_value;
4004 if (sctp_style(sk, TCP))
4005 info->pr_assoc_id = SCTP_FUTURE_ASSOC;
4007 if (info->pr_assoc_id == SCTP_FUTURE_ASSOC ||
4008 info->pr_assoc_id == SCTP_ALL_ASSOC) {
4009 SCTP_PR_SET_POLICY(sp->default_flags, info->pr_policy);
4010 sp->default_timetolive = info->pr_value;
4013 if (info->pr_assoc_id == SCTP_CURRENT_ASSOC ||
4014 info->pr_assoc_id == SCTP_ALL_ASSOC) {
4015 list_for_each_entry(asoc, &sp->ep->asocs, asocs) {
4016 SCTP_PR_SET_POLICY(asoc->default_flags,
4018 asoc->default_timetolive = info->pr_value;
4026 static int sctp_setsockopt_reconfig_supported(struct sock *sk,
4027 struct sctp_assoc_value *params,
4028 unsigned int optlen)
4030 struct sctp_association *asoc;
4031 int retval = -EINVAL;
4033 if (optlen != sizeof(*params))
4036 asoc = sctp_id2assoc(sk, params->assoc_id);
4037 if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC &&
4038 sctp_style(sk, UDP))
4041 sctp_sk(sk)->ep->reconf_enable = !!params->assoc_value;
4049 static int sctp_setsockopt_enable_strreset(struct sock *sk,
4050 struct sctp_assoc_value *params,
4051 unsigned int optlen)
4053 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
4054 struct sctp_association *asoc;
4055 int retval = -EINVAL;
4057 if (optlen != sizeof(*params))
4060 if (params->assoc_value & (~SCTP_ENABLE_STRRESET_MASK))
4063 asoc = sctp_id2assoc(sk, params->assoc_id);
4064 if (!asoc && params->assoc_id > SCTP_ALL_ASSOC &&
4065 sctp_style(sk, UDP))
4071 asoc->strreset_enable = params->assoc_value;
4075 if (sctp_style(sk, TCP))
4076 params->assoc_id = SCTP_FUTURE_ASSOC;
4078 if (params->assoc_id == SCTP_FUTURE_ASSOC ||
4079 params->assoc_id == SCTP_ALL_ASSOC)
4080 ep->strreset_enable = params->assoc_value;
4082 if (params->assoc_id == SCTP_CURRENT_ASSOC ||
4083 params->assoc_id == SCTP_ALL_ASSOC)
4084 list_for_each_entry(asoc, &ep->asocs, asocs)
4085 asoc->strreset_enable = params->assoc_value;
4091 static int sctp_setsockopt_reset_streams(struct sock *sk,
4092 struct sctp_reset_streams *params,
4093 unsigned int optlen)
4095 struct sctp_association *asoc;
4097 if (optlen < sizeof(*params))
4099 /* srs_number_streams is u16, so optlen can't be bigger than this. */
4100 optlen = min_t(unsigned int, optlen, USHRT_MAX +
4101 sizeof(__u16) * sizeof(*params));
4103 if (params->srs_number_streams * sizeof(__u16) >
4104 optlen - sizeof(*params))
4107 asoc = sctp_id2assoc(sk, params->srs_assoc_id);
4111 return sctp_send_reset_streams(asoc, params);
4114 static int sctp_setsockopt_reset_assoc(struct sock *sk, sctp_assoc_t *associd,
4115 unsigned int optlen)
4117 struct sctp_association *asoc;
4119 if (optlen != sizeof(*associd))
4122 asoc = sctp_id2assoc(sk, *associd);
4126 return sctp_send_reset_assoc(asoc);
4129 static int sctp_setsockopt_add_streams(struct sock *sk,
4130 struct sctp_add_streams *params,
4131 unsigned int optlen)
4133 struct sctp_association *asoc;
4135 if (optlen != sizeof(*params))
4138 asoc = sctp_id2assoc(sk, params->sas_assoc_id);
4142 return sctp_send_add_streams(asoc, params);
4145 static int sctp_setsockopt_scheduler(struct sock *sk,
4146 struct sctp_assoc_value *params,
4147 unsigned int optlen)
4149 struct sctp_sock *sp = sctp_sk(sk);
4150 struct sctp_association *asoc;
4153 if (optlen < sizeof(*params))
4156 if (params->assoc_value > SCTP_SS_MAX)
4159 asoc = sctp_id2assoc(sk, params->assoc_id);
4160 if (!asoc && params->assoc_id > SCTP_ALL_ASSOC &&
4161 sctp_style(sk, UDP))
4165 return sctp_sched_set_sched(asoc, params->assoc_value);
4167 if (sctp_style(sk, TCP))
4168 params->assoc_id = SCTP_FUTURE_ASSOC;
4170 if (params->assoc_id == SCTP_FUTURE_ASSOC ||
4171 params->assoc_id == SCTP_ALL_ASSOC)
4172 sp->default_ss = params->assoc_value;
4174 if (params->assoc_id == SCTP_CURRENT_ASSOC ||
4175 params->assoc_id == SCTP_ALL_ASSOC) {
4176 list_for_each_entry(asoc, &sp->ep->asocs, asocs) {
4177 int ret = sctp_sched_set_sched(asoc,
4178 params->assoc_value);
4188 static int sctp_setsockopt_scheduler_value(struct sock *sk,
4189 struct sctp_stream_value *params,
4190 unsigned int optlen)
4192 struct sctp_association *asoc;
4193 int retval = -EINVAL;
4195 if (optlen < sizeof(*params))
4198 asoc = sctp_id2assoc(sk, params->assoc_id);
4199 if (!asoc && params->assoc_id != SCTP_CURRENT_ASSOC &&
4200 sctp_style(sk, UDP))
4204 retval = sctp_sched_set_value(asoc, params->stream_id,
4205 params->stream_value, GFP_KERNEL);
4211 list_for_each_entry(asoc, &sctp_sk(sk)->ep->asocs, asocs) {
4212 int ret = sctp_sched_set_value(asoc, params->stream_id,
4213 params->stream_value,
4215 if (ret && !retval) /* try to return the 1st error. */
4223 static int sctp_setsockopt_interleaving_supported(struct sock *sk,
4224 struct sctp_assoc_value *p,
4225 unsigned int optlen)
4227 struct sctp_sock *sp = sctp_sk(sk);
4228 struct sctp_association *asoc;
4230 if (optlen < sizeof(*p))
4233 asoc = sctp_id2assoc(sk, p->assoc_id);
4234 if (!asoc && p->assoc_id != SCTP_FUTURE_ASSOC && sctp_style(sk, UDP))
4237 if (!sock_net(sk)->sctp.intl_enable || !sp->frag_interleave) {
4241 sp->ep->intl_enable = !!p->assoc_value;
4245 static int sctp_setsockopt_reuse_port(struct sock *sk, int *val,
4246 unsigned int optlen)
4248 if (!sctp_style(sk, TCP))
4251 if (sctp_sk(sk)->ep->base.bind_addr.port)
4254 if (optlen < sizeof(int))
4257 sctp_sk(sk)->reuse = !!*val;
4262 static int sctp_assoc_ulpevent_type_set(struct sctp_event *param,
4263 struct sctp_association *asoc)
4265 struct sctp_ulpevent *event;
4267 sctp_ulpevent_type_set(&asoc->subscribe, param->se_type, param->se_on);
4269 if (param->se_type == SCTP_SENDER_DRY_EVENT && param->se_on) {
4270 if (sctp_outq_is_empty(&asoc->outqueue)) {
4271 event = sctp_ulpevent_make_sender_dry_event(asoc,
4272 GFP_USER | __GFP_NOWARN);
4276 asoc->stream.si->enqueue_event(&asoc->ulpq, event);
4283 static int sctp_setsockopt_event(struct sock *sk, struct sctp_event *param,
4284 unsigned int optlen)
4286 struct sctp_sock *sp = sctp_sk(sk);
4287 struct sctp_association *asoc;
4290 if (optlen < sizeof(*param))
4293 if (param->se_type < SCTP_SN_TYPE_BASE ||
4294 param->se_type > SCTP_SN_TYPE_MAX)
4297 asoc = sctp_id2assoc(sk, param->se_assoc_id);
4298 if (!asoc && param->se_assoc_id > SCTP_ALL_ASSOC &&
4299 sctp_style(sk, UDP))
4303 return sctp_assoc_ulpevent_type_set(param, asoc);
4305 if (sctp_style(sk, TCP))
4306 param->se_assoc_id = SCTP_FUTURE_ASSOC;
4308 if (param->se_assoc_id == SCTP_FUTURE_ASSOC ||
4309 param->se_assoc_id == SCTP_ALL_ASSOC)
4310 sctp_ulpevent_type_set(&sp->subscribe,
4311 param->se_type, param->se_on);
4313 if (param->se_assoc_id == SCTP_CURRENT_ASSOC ||
4314 param->se_assoc_id == SCTP_ALL_ASSOC) {
4315 list_for_each_entry(asoc, &sp->ep->asocs, asocs) {
4316 int ret = sctp_assoc_ulpevent_type_set(param, asoc);
4326 static int sctp_setsockopt_asconf_supported(struct sock *sk,
4327 struct sctp_assoc_value *params,
4328 unsigned int optlen)
4330 struct sctp_association *asoc;
4331 struct sctp_endpoint *ep;
4332 int retval = -EINVAL;
4334 if (optlen != sizeof(*params))
4337 asoc = sctp_id2assoc(sk, params->assoc_id);
4338 if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC &&
4339 sctp_style(sk, UDP))
4342 ep = sctp_sk(sk)->ep;
4343 ep->asconf_enable = !!params->assoc_value;
4345 if (ep->asconf_enable && ep->auth_enable) {
4346 sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF);
4347 sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF_ACK);
4356 static int sctp_setsockopt_auth_supported(struct sock *sk,
4357 struct sctp_assoc_value *params,
4358 unsigned int optlen)
4360 struct sctp_association *asoc;
4361 struct sctp_endpoint *ep;
4362 int retval = -EINVAL;
4364 if (optlen != sizeof(*params))
4367 asoc = sctp_id2assoc(sk, params->assoc_id);
4368 if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC &&
4369 sctp_style(sk, UDP))
4372 ep = sctp_sk(sk)->ep;
4373 if (params->assoc_value) {
4374 retval = sctp_auth_init(ep, GFP_KERNEL);
4377 if (ep->asconf_enable) {
4378 sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF);
4379 sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF_ACK);
4383 ep->auth_enable = !!params->assoc_value;
4390 static int sctp_setsockopt_ecn_supported(struct sock *sk,
4391 struct sctp_assoc_value *params,
4392 unsigned int optlen)
4394 struct sctp_association *asoc;
4395 int retval = -EINVAL;
4397 if (optlen != sizeof(*params))
4400 asoc = sctp_id2assoc(sk, params->assoc_id);
4401 if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC &&
4402 sctp_style(sk, UDP))
4405 sctp_sk(sk)->ep->ecn_enable = !!params->assoc_value;
4412 static int sctp_setsockopt_pf_expose(struct sock *sk,
4413 struct sctp_assoc_value *params,
4414 unsigned int optlen)
4416 struct sctp_association *asoc;
4417 int retval = -EINVAL;
4419 if (optlen != sizeof(*params))
4422 if (params->assoc_value > SCTP_PF_EXPOSE_MAX)
4425 asoc = sctp_id2assoc(sk, params->assoc_id);
4426 if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC &&
4427 sctp_style(sk, UDP))
4431 asoc->pf_expose = params->assoc_value;
4433 sctp_sk(sk)->pf_expose = params->assoc_value;
4440 static int sctp_setsockopt_encap_port(struct sock *sk,
4441 struct sctp_udpencaps *encap,
4442 unsigned int optlen)
4444 struct sctp_association *asoc;
4445 struct sctp_transport *t;
4448 if (optlen != sizeof(*encap))
4451 /* If an address other than INADDR_ANY is specified, and
4452 * no transport is found, then the request is invalid.
4454 encap_port = (__force __be16)encap->sue_port;
4455 if (!sctp_is_any(sk, (union sctp_addr *)&encap->sue_address)) {
4456 t = sctp_addr_id2transport(sk, &encap->sue_address,
4457 encap->sue_assoc_id);
4461 t->encap_port = encap_port;
4465 /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
4466 * socket is a one to many style socket, and an association
4467 * was not found, then the id was invalid.
4469 asoc = sctp_id2assoc(sk, encap->sue_assoc_id);
4470 if (!asoc && encap->sue_assoc_id != SCTP_FUTURE_ASSOC &&
4471 sctp_style(sk, UDP))
4474 /* If changes are for association, also apply encap_port to
4478 list_for_each_entry(t, &asoc->peer.transport_addr_list,
4480 t->encap_port = encap_port;
4482 asoc->encap_port = encap_port;
4486 sctp_sk(sk)->encap_port = encap_port;
4490 static int sctp_setsockopt_probe_interval(struct sock *sk,
4491 struct sctp_probeinterval *params,
4492 unsigned int optlen)
4494 struct sctp_association *asoc;
4495 struct sctp_transport *t;
4496 __u32 probe_interval;
4498 if (optlen != sizeof(*params))
4501 probe_interval = params->spi_interval;
4502 if (probe_interval && probe_interval < SCTP_PROBE_TIMER_MIN)
4505 /* If an address other than INADDR_ANY is specified, and
4506 * no transport is found, then the request is invalid.
4508 if (!sctp_is_any(sk, (union sctp_addr *)¶ms->spi_address)) {
4509 t = sctp_addr_id2transport(sk, ¶ms->spi_address,
4510 params->spi_assoc_id);
4514 t->probe_interval = msecs_to_jiffies(probe_interval);
4515 sctp_transport_pl_reset(t);
4519 /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
4520 * socket is a one to many style socket, and an association
4521 * was not found, then the id was invalid.
4523 asoc = sctp_id2assoc(sk, params->spi_assoc_id);
4524 if (!asoc && params->spi_assoc_id != SCTP_FUTURE_ASSOC &&
4525 sctp_style(sk, UDP))
4528 /* If changes are for association, also apply probe_interval to
4532 list_for_each_entry(t, &asoc->peer.transport_addr_list, transports) {
4533 t->probe_interval = msecs_to_jiffies(probe_interval);
4534 sctp_transport_pl_reset(t);
4537 asoc->probe_interval = msecs_to_jiffies(probe_interval);
4541 sctp_sk(sk)->probe_interval = probe_interval;
4545 /* API 6.2 setsockopt(), getsockopt()
4547 * Applications use setsockopt() and getsockopt() to set or retrieve
4548 * socket options. Socket options are used to change the default
4549 * behavior of sockets calls. They are described in Section 7.
4553 * ret = getsockopt(int sd, int level, int optname, void __user *optval,
4554 * int __user *optlen);
4555 * ret = setsockopt(int sd, int level, int optname, const void __user *optval,
4558 * sd - the socket descript.
4559 * level - set to IPPROTO_SCTP for all SCTP options.
4560 * optname - the option name.
4561 * optval - the buffer to store the value of the option.
4562 * optlen - the size of the buffer.
4564 static int sctp_setsockopt(struct sock *sk, int level, int optname,
4565 sockptr_t optval, unsigned int optlen)
4570 pr_debug("%s: sk:%p, optname:%d\n", __func__, sk, optname);
4572 /* I can hardly begin to describe how wrong this is. This is
4573 * so broken as to be worse than useless. The API draft
4574 * REALLY is NOT helpful here... I am not convinced that the
4575 * semantics of setsockopt() with a level OTHER THAN SOL_SCTP
4576 * are at all well-founded.
4578 if (level != SOL_SCTP) {
4579 struct sctp_af *af = sctp_sk(sk)->pf->af;
4581 return af->setsockopt(sk, level, optname, optval, optlen);
4585 /* Trim it to the biggest size sctp sockopt may need if necessary */
4586 optlen = min_t(unsigned int, optlen,
4587 PAGE_ALIGN(USHRT_MAX +
4588 sizeof(__u16) * sizeof(struct sctp_reset_streams)));
4589 kopt = memdup_sockptr(optval, optlen);
4591 return PTR_ERR(kopt);
4597 case SCTP_SOCKOPT_BINDX_ADD:
4598 /* 'optlen' is the size of the addresses buffer. */
4599 retval = sctp_setsockopt_bindx(sk, kopt, optlen,
4600 SCTP_BINDX_ADD_ADDR);
4603 case SCTP_SOCKOPT_BINDX_REM:
4604 /* 'optlen' is the size of the addresses buffer. */
4605 retval = sctp_setsockopt_bindx(sk, kopt, optlen,
4606 SCTP_BINDX_REM_ADDR);
4609 case SCTP_SOCKOPT_CONNECTX_OLD:
4610 /* 'optlen' is the size of the addresses buffer. */
4611 retval = sctp_setsockopt_connectx_old(sk, kopt, optlen);
4614 case SCTP_SOCKOPT_CONNECTX:
4615 /* 'optlen' is the size of the addresses buffer. */
4616 retval = sctp_setsockopt_connectx(sk, kopt, optlen);
4619 case SCTP_DISABLE_FRAGMENTS:
4620 retval = sctp_setsockopt_disable_fragments(sk, kopt, optlen);
4624 retval = sctp_setsockopt_events(sk, kopt, optlen);
4627 case SCTP_AUTOCLOSE:
4628 retval = sctp_setsockopt_autoclose(sk, kopt, optlen);
4631 case SCTP_PEER_ADDR_PARAMS:
4632 retval = sctp_setsockopt_peer_addr_params(sk, kopt, optlen);
4635 case SCTP_DELAYED_SACK:
4636 retval = sctp_setsockopt_delayed_ack(sk, kopt, optlen);
4638 case SCTP_PARTIAL_DELIVERY_POINT:
4639 retval = sctp_setsockopt_partial_delivery_point(sk, kopt, optlen);
4643 retval = sctp_setsockopt_initmsg(sk, kopt, optlen);
4645 case SCTP_DEFAULT_SEND_PARAM:
4646 retval = sctp_setsockopt_default_send_param(sk, kopt, optlen);
4648 case SCTP_DEFAULT_SNDINFO:
4649 retval = sctp_setsockopt_default_sndinfo(sk, kopt, optlen);
4651 case SCTP_PRIMARY_ADDR:
4652 retval = sctp_setsockopt_primary_addr(sk, kopt, optlen);
4654 case SCTP_SET_PEER_PRIMARY_ADDR:
4655 retval = sctp_setsockopt_peer_primary_addr(sk, kopt, optlen);
4658 retval = sctp_setsockopt_nodelay(sk, kopt, optlen);
4661 retval = sctp_setsockopt_rtoinfo(sk, kopt, optlen);
4663 case SCTP_ASSOCINFO:
4664 retval = sctp_setsockopt_associnfo(sk, kopt, optlen);
4666 case SCTP_I_WANT_MAPPED_V4_ADDR:
4667 retval = sctp_setsockopt_mappedv4(sk, kopt, optlen);
4670 retval = sctp_setsockopt_maxseg(sk, kopt, optlen);
4672 case SCTP_ADAPTATION_LAYER:
4673 retval = sctp_setsockopt_adaptation_layer(sk, kopt, optlen);
4676 retval = sctp_setsockopt_context(sk, kopt, optlen);
4678 case SCTP_FRAGMENT_INTERLEAVE:
4679 retval = sctp_setsockopt_fragment_interleave(sk, kopt, optlen);
4681 case SCTP_MAX_BURST:
4682 retval = sctp_setsockopt_maxburst(sk, kopt, optlen);
4684 case SCTP_AUTH_CHUNK:
4685 retval = sctp_setsockopt_auth_chunk(sk, kopt, optlen);
4687 case SCTP_HMAC_IDENT:
4688 retval = sctp_setsockopt_hmac_ident(sk, kopt, optlen);
4691 retval = sctp_setsockopt_auth_key(sk, kopt, optlen);
4693 case SCTP_AUTH_ACTIVE_KEY:
4694 retval = sctp_setsockopt_active_key(sk, kopt, optlen);
4696 case SCTP_AUTH_DELETE_KEY:
4697 retval = sctp_setsockopt_del_key(sk, kopt, optlen);
4699 case SCTP_AUTH_DEACTIVATE_KEY:
4700 retval = sctp_setsockopt_deactivate_key(sk, kopt, optlen);
4702 case SCTP_AUTO_ASCONF:
4703 retval = sctp_setsockopt_auto_asconf(sk, kopt, optlen);
4705 case SCTP_PEER_ADDR_THLDS:
4706 retval = sctp_setsockopt_paddr_thresholds(sk, kopt, optlen,
4709 case SCTP_PEER_ADDR_THLDS_V2:
4710 retval = sctp_setsockopt_paddr_thresholds(sk, kopt, optlen,
4713 case SCTP_RECVRCVINFO:
4714 retval = sctp_setsockopt_recvrcvinfo(sk, kopt, optlen);
4716 case SCTP_RECVNXTINFO:
4717 retval = sctp_setsockopt_recvnxtinfo(sk, kopt, optlen);
4719 case SCTP_PR_SUPPORTED:
4720 retval = sctp_setsockopt_pr_supported(sk, kopt, optlen);
4722 case SCTP_DEFAULT_PRINFO:
4723 retval = sctp_setsockopt_default_prinfo(sk, kopt, optlen);
4725 case SCTP_RECONFIG_SUPPORTED:
4726 retval = sctp_setsockopt_reconfig_supported(sk, kopt, optlen);
4728 case SCTP_ENABLE_STREAM_RESET:
4729 retval = sctp_setsockopt_enable_strreset(sk, kopt, optlen);
4731 case SCTP_RESET_STREAMS:
4732 retval = sctp_setsockopt_reset_streams(sk, kopt, optlen);
4734 case SCTP_RESET_ASSOC:
4735 retval = sctp_setsockopt_reset_assoc(sk, kopt, optlen);
4737 case SCTP_ADD_STREAMS:
4738 retval = sctp_setsockopt_add_streams(sk, kopt, optlen);
4740 case SCTP_STREAM_SCHEDULER:
4741 retval = sctp_setsockopt_scheduler(sk, kopt, optlen);
4743 case SCTP_STREAM_SCHEDULER_VALUE:
4744 retval = sctp_setsockopt_scheduler_value(sk, kopt, optlen);
4746 case SCTP_INTERLEAVING_SUPPORTED:
4747 retval = sctp_setsockopt_interleaving_supported(sk, kopt,
4750 case SCTP_REUSE_PORT:
4751 retval = sctp_setsockopt_reuse_port(sk, kopt, optlen);
4754 retval = sctp_setsockopt_event(sk, kopt, optlen);
4756 case SCTP_ASCONF_SUPPORTED:
4757 retval = sctp_setsockopt_asconf_supported(sk, kopt, optlen);
4759 case SCTP_AUTH_SUPPORTED:
4760 retval = sctp_setsockopt_auth_supported(sk, kopt, optlen);
4762 case SCTP_ECN_SUPPORTED:
4763 retval = sctp_setsockopt_ecn_supported(sk, kopt, optlen);
4765 case SCTP_EXPOSE_POTENTIALLY_FAILED_STATE:
4766 retval = sctp_setsockopt_pf_expose(sk, kopt, optlen);
4768 case SCTP_REMOTE_UDP_ENCAPS_PORT:
4769 retval = sctp_setsockopt_encap_port(sk, kopt, optlen);
4771 case SCTP_PLPMTUD_PROBE_INTERVAL:
4772 retval = sctp_setsockopt_probe_interval(sk, kopt, optlen);
4775 retval = -ENOPROTOOPT;
4784 /* API 3.1.6 connect() - UDP Style Syntax
4786 * An application may use the connect() call in the UDP model to initiate an
4787 * association without sending data.
4791 * ret = connect(int sd, const struct sockaddr *nam, socklen_t len);
4793 * sd: the socket descriptor to have a new association added to.
4795 * nam: the address structure (either struct sockaddr_in or struct
4796 * sockaddr_in6 defined in RFC2553 [7]).
4798 * len: the size of the address.
4800 static int sctp_connect(struct sock *sk, struct sockaddr *addr,
4801 int addr_len, int flags)
4807 pr_debug("%s: sk:%p, sockaddr:%p, addr_len:%d\n", __func__, sk,
4810 /* Validate addr_len before calling common connect/connectx routine. */
4811 af = sctp_get_af_specific(addr->sa_family);
4812 if (af && addr_len >= af->sockaddr_len)
4813 err = __sctp_connect(sk, addr, af->sockaddr_len, flags, NULL);
4819 int sctp_inet_connect(struct socket *sock, struct sockaddr *uaddr,
4820 int addr_len, int flags)
4822 if (addr_len < sizeof(uaddr->sa_family))
4825 if (uaddr->sa_family == AF_UNSPEC)
4828 return sctp_connect(sock->sk, uaddr, addr_len, flags);
4831 /* FIXME: Write comments. */
4832 static int sctp_disconnect(struct sock *sk, int flags)
4834 return -EOPNOTSUPP; /* STUB */
4837 /* 4.1.4 accept() - TCP Style Syntax
4839 * Applications use accept() call to remove an established SCTP
4840 * association from the accept queue of the endpoint. A new socket
4841 * descriptor will be returned from accept() to represent the newly
4842 * formed association.
4844 static struct sock *sctp_accept(struct sock *sk, int flags, int *err, bool kern)
4846 struct sctp_sock *sp;
4847 struct sctp_endpoint *ep;
4848 struct sock *newsk = NULL;
4849 struct sctp_association *asoc;
4858 if (!sctp_style(sk, TCP)) {
4859 error = -EOPNOTSUPP;
4863 if (!sctp_sstate(sk, LISTENING)) {
4868 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
4870 error = sctp_wait_for_accept(sk, timeo);
4874 /* We treat the list of associations on the endpoint as the accept
4875 * queue and pick the first association on the list.
4877 asoc = list_entry(ep->asocs.next, struct sctp_association, asocs);
4879 newsk = sp->pf->create_accept_sk(sk, asoc, kern);
4885 /* Populate the fields of the newsk from the oldsk and migrate the
4886 * asoc to the newsk.
4888 error = sctp_sock_migrate(sk, newsk, asoc, SCTP_SOCKET_TCP);
4890 sk_common_release(newsk);
4900 /* The SCTP ioctl handler. */
4901 static int sctp_ioctl(struct sock *sk, int cmd, unsigned long arg)
4908 * SEQPACKET-style sockets in LISTENING state are valid, for
4909 * SCTP, so only discard TCP-style sockets in LISTENING state.
4911 if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))
4916 struct sk_buff *skb;
4917 unsigned int amount = 0;
4919 skb = skb_peek(&sk->sk_receive_queue);
4922 * We will only return the amount of this packet since
4923 * that is all that will be read.
4927 rc = put_user(amount, (int __user *)arg);
4939 /* This is the function which gets called during socket creation to
4940 * initialized the SCTP-specific portion of the sock.
4941 * The sock structure should already be zero-filled memory.
4943 static int sctp_init_sock(struct sock *sk)
4945 struct net *net = sock_net(sk);
4946 struct sctp_sock *sp;
4948 pr_debug("%s: sk:%p\n", __func__, sk);
4952 /* Initialize the SCTP per socket area. */
4953 switch (sk->sk_type) {
4954 case SOCK_SEQPACKET:
4955 sp->type = SCTP_SOCKET_UDP;
4958 sp->type = SCTP_SOCKET_TCP;
4961 return -ESOCKTNOSUPPORT;
4964 sk->sk_gso_type = SKB_GSO_SCTP;
4966 /* Initialize default send parameters. These parameters can be
4967 * modified with the SCTP_DEFAULT_SEND_PARAM socket option.
4969 sp->default_stream = 0;
4970 sp->default_ppid = 0;
4971 sp->default_flags = 0;
4972 sp->default_context = 0;
4973 sp->default_timetolive = 0;
4975 sp->default_rcv_context = 0;
4976 sp->max_burst = net->sctp.max_burst;
4978 sp->sctp_hmac_alg = net->sctp.sctp_hmac_alg;
4980 /* Initialize default setup parameters. These parameters
4981 * can be modified with the SCTP_INITMSG socket option or
4982 * overridden by the SCTP_INIT CMSG.
4984 sp->initmsg.sinit_num_ostreams = sctp_max_outstreams;
4985 sp->initmsg.sinit_max_instreams = sctp_max_instreams;
4986 sp->initmsg.sinit_max_attempts = net->sctp.max_retrans_init;
4987 sp->initmsg.sinit_max_init_timeo = net->sctp.rto_max;
4989 /* Initialize default RTO related parameters. These parameters can
4990 * be modified for with the SCTP_RTOINFO socket option.
4992 sp->rtoinfo.srto_initial = net->sctp.rto_initial;
4993 sp->rtoinfo.srto_max = net->sctp.rto_max;
4994 sp->rtoinfo.srto_min = net->sctp.rto_min;
4996 /* Initialize default association related parameters. These parameters
4997 * can be modified with the SCTP_ASSOCINFO socket option.
4999 sp->assocparams.sasoc_asocmaxrxt = net->sctp.max_retrans_association;
5000 sp->assocparams.sasoc_number_peer_destinations = 0;
5001 sp->assocparams.sasoc_peer_rwnd = 0;
5002 sp->assocparams.sasoc_local_rwnd = 0;
5003 sp->assocparams.sasoc_cookie_life = net->sctp.valid_cookie_life;
5005 /* Initialize default event subscriptions. By default, all the
5010 /* Default Peer Address Parameters. These defaults can
5011 * be modified via SCTP_PEER_ADDR_PARAMS
5013 sp->hbinterval = net->sctp.hb_interval;
5014 sp->udp_port = htons(net->sctp.udp_port);
5015 sp->encap_port = htons(net->sctp.encap_port);
5016 sp->pathmaxrxt = net->sctp.max_retrans_path;
5017 sp->pf_retrans = net->sctp.pf_retrans;
5018 sp->ps_retrans = net->sctp.ps_retrans;
5019 sp->pf_expose = net->sctp.pf_expose;
5020 sp->pathmtu = 0; /* allow default discovery */
5021 sp->sackdelay = net->sctp.sack_timeout;
5023 sp->param_flags = SPP_HB_ENABLE |
5025 SPP_SACKDELAY_ENABLE;
5026 sp->default_ss = SCTP_SS_DEFAULT;
5028 /* If enabled no SCTP message fragmentation will be performed.
5029 * Configure through SCTP_DISABLE_FRAGMENTS socket option.
5031 sp->disable_fragments = 0;
5033 /* Enable Nagle algorithm by default. */
5036 sp->recvrcvinfo = 0;
5037 sp->recvnxtinfo = 0;
5039 /* Enable by default. */
5042 /* Auto-close idle associations after the configured
5043 * number of seconds. A value of 0 disables this
5044 * feature. Configure through the SCTP_AUTOCLOSE socket option,
5045 * for UDP-style sockets only.
5049 /* User specified fragmentation limit. */
5052 sp->adaptation_ind = 0;
5054 sp->pf = sctp_get_pf_specific(sk->sk_family);
5056 /* Control variables for partial data delivery. */
5057 atomic_set(&sp->pd_mode, 0);
5058 skb_queue_head_init(&sp->pd_lobby);
5059 sp->frag_interleave = 0;
5060 sp->probe_interval = net->sctp.probe_interval;
5062 /* Create a per socket endpoint structure. Even if we
5063 * change the data structure relationships, this may still
5064 * be useful for storing pre-connect address information.
5066 sp->ep = sctp_endpoint_new(sk, GFP_KERNEL);
5072 sk->sk_destruct = sctp_destruct_sock;
5074 SCTP_DBG_OBJCNT_INC(sock);
5077 sk_sockets_allocated_inc(sk);
5078 sock_prot_inuse_add(net, sk->sk_prot, 1);
5085 /* Cleanup any SCTP per socket resources. Must be called with
5086 * sock_net(sk)->sctp.addr_wq_lock held if sp->do_auto_asconf is true
5088 static void sctp_destroy_sock(struct sock *sk)
5090 struct sctp_sock *sp;
5092 pr_debug("%s: sk:%p\n", __func__, sk);
5094 /* Release our hold on the endpoint. */
5096 /* This could happen during socket init, thus we bail out
5097 * early, since the rest of the below is not setup either.
5102 if (sp->do_auto_asconf) {
5103 sp->do_auto_asconf = 0;
5104 list_del(&sp->auto_asconf_list);
5106 sctp_endpoint_free(sp->ep);
5108 sk_sockets_allocated_dec(sk);
5109 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
5113 /* Triggered when there are no references on the socket anymore */
5114 static void sctp_destruct_common(struct sock *sk)
5116 struct sctp_sock *sp = sctp_sk(sk);
5118 /* Free up the HMAC transform. */
5119 crypto_free_shash(sp->hmac);
5122 static void sctp_destruct_sock(struct sock *sk)
5124 sctp_destruct_common(sk);
5125 inet_sock_destruct(sk);
5128 /* API 4.1.7 shutdown() - TCP Style Syntax
5129 * int shutdown(int socket, int how);
5131 * sd - the socket descriptor of the association to be closed.
5132 * how - Specifies the type of shutdown. The values are
5135 * Disables further receive operations. No SCTP
5136 * protocol action is taken.
5138 * Disables further send operations, and initiates
5139 * the SCTP shutdown sequence.
5141 * Disables further send and receive operations
5142 * and initiates the SCTP shutdown sequence.
5144 static void sctp_shutdown(struct sock *sk, int how)
5146 struct net *net = sock_net(sk);
5147 struct sctp_endpoint *ep;
5149 if (!sctp_style(sk, TCP))
5152 ep = sctp_sk(sk)->ep;
5153 if (how & SEND_SHUTDOWN && !list_empty(&ep->asocs)) {
5154 struct sctp_association *asoc;
5156 inet_sk_set_state(sk, SCTP_SS_CLOSING);
5157 asoc = list_entry(ep->asocs.next,
5158 struct sctp_association, asocs);
5159 sctp_primitive_SHUTDOWN(net, asoc, NULL);
5163 int sctp_get_sctp_info(struct sock *sk, struct sctp_association *asoc,
5164 struct sctp_info *info)
5166 struct sctp_transport *prim;
5167 struct list_head *pos;
5170 memset(info, 0, sizeof(*info));
5172 struct sctp_sock *sp = sctp_sk(sk);
5174 info->sctpi_s_autoclose = sp->autoclose;
5175 info->sctpi_s_adaptation_ind = sp->adaptation_ind;
5176 info->sctpi_s_pd_point = sp->pd_point;
5177 info->sctpi_s_nodelay = sp->nodelay;
5178 info->sctpi_s_disable_fragments = sp->disable_fragments;
5179 info->sctpi_s_v4mapped = sp->v4mapped;
5180 info->sctpi_s_frag_interleave = sp->frag_interleave;
5181 info->sctpi_s_type = sp->type;
5186 info->sctpi_tag = asoc->c.my_vtag;
5187 info->sctpi_state = asoc->state;
5188 info->sctpi_rwnd = asoc->a_rwnd;
5189 info->sctpi_unackdata = asoc->unack_data;
5190 info->sctpi_penddata = sctp_tsnmap_pending(&asoc->peer.tsn_map);
5191 info->sctpi_instrms = asoc->stream.incnt;
5192 info->sctpi_outstrms = asoc->stream.outcnt;
5193 list_for_each(pos, &asoc->base.inqueue.in_chunk_list)
5194 info->sctpi_inqueue++;
5195 list_for_each(pos, &asoc->outqueue.out_chunk_list)
5196 info->sctpi_outqueue++;
5197 info->sctpi_overall_error = asoc->overall_error_count;
5198 info->sctpi_max_burst = asoc->max_burst;
5199 info->sctpi_maxseg = asoc->frag_point;
5200 info->sctpi_peer_rwnd = asoc->peer.rwnd;
5201 info->sctpi_peer_tag = asoc->c.peer_vtag;
5203 mask = asoc->peer.ecn_capable << 1;
5204 mask = (mask | asoc->peer.ipv4_address) << 1;
5205 mask = (mask | asoc->peer.ipv6_address) << 1;
5206 mask = (mask | asoc->peer.hostname_address) << 1;
5207 mask = (mask | asoc->peer.asconf_capable) << 1;
5208 mask = (mask | asoc->peer.prsctp_capable) << 1;
5209 mask = (mask | asoc->peer.auth_capable);
5210 info->sctpi_peer_capable = mask;
5211 mask = asoc->peer.sack_needed << 1;
5212 mask = (mask | asoc->peer.sack_generation) << 1;
5213 mask = (mask | asoc->peer.zero_window_announced);
5214 info->sctpi_peer_sack = mask;
5216 info->sctpi_isacks = asoc->stats.isacks;
5217 info->sctpi_osacks = asoc->stats.osacks;
5218 info->sctpi_opackets = asoc->stats.opackets;
5219 info->sctpi_ipackets = asoc->stats.ipackets;
5220 info->sctpi_rtxchunks = asoc->stats.rtxchunks;
5221 info->sctpi_outofseqtsns = asoc->stats.outofseqtsns;
5222 info->sctpi_idupchunks = asoc->stats.idupchunks;
5223 info->sctpi_gapcnt = asoc->stats.gapcnt;
5224 info->sctpi_ouodchunks = asoc->stats.ouodchunks;
5225 info->sctpi_iuodchunks = asoc->stats.iuodchunks;
5226 info->sctpi_oodchunks = asoc->stats.oodchunks;
5227 info->sctpi_iodchunks = asoc->stats.iodchunks;
5228 info->sctpi_octrlchunks = asoc->stats.octrlchunks;
5229 info->sctpi_ictrlchunks = asoc->stats.ictrlchunks;
5231 prim = asoc->peer.primary_path;
5232 memcpy(&info->sctpi_p_address, &prim->ipaddr, sizeof(prim->ipaddr));
5233 info->sctpi_p_state = prim->state;
5234 info->sctpi_p_cwnd = prim->cwnd;
5235 info->sctpi_p_srtt = prim->srtt;
5236 info->sctpi_p_rto = jiffies_to_msecs(prim->rto);
5237 info->sctpi_p_hbinterval = prim->hbinterval;
5238 info->sctpi_p_pathmaxrxt = prim->pathmaxrxt;
5239 info->sctpi_p_sackdelay = jiffies_to_msecs(prim->sackdelay);
5240 info->sctpi_p_ssthresh = prim->ssthresh;
5241 info->sctpi_p_partial_bytes_acked = prim->partial_bytes_acked;
5242 info->sctpi_p_flight_size = prim->flight_size;
5243 info->sctpi_p_error = prim->error_count;
5247 EXPORT_SYMBOL_GPL(sctp_get_sctp_info);
5249 /* use callback to avoid exporting the core structure */
5250 void sctp_transport_walk_start(struct rhashtable_iter *iter) __acquires(RCU)
5252 rhltable_walk_enter(&sctp_transport_hashtable, iter);
5254 rhashtable_walk_start(iter);
5257 void sctp_transport_walk_stop(struct rhashtable_iter *iter) __releases(RCU)
5259 rhashtable_walk_stop(iter);
5260 rhashtable_walk_exit(iter);
5263 struct sctp_transport *sctp_transport_get_next(struct net *net,
5264 struct rhashtable_iter *iter)
5266 struct sctp_transport *t;
5268 t = rhashtable_walk_next(iter);
5269 for (; t; t = rhashtable_walk_next(iter)) {
5271 if (PTR_ERR(t) == -EAGAIN)
5276 if (!sctp_transport_hold(t))
5279 if (net_eq(t->asoc->base.net, net) &&
5280 t->asoc->peer.primary_path == t)
5283 sctp_transport_put(t);
5289 struct sctp_transport *sctp_transport_get_idx(struct net *net,
5290 struct rhashtable_iter *iter,
5293 struct sctp_transport *t;
5296 return SEQ_START_TOKEN;
5298 while ((t = sctp_transport_get_next(net, iter)) && !IS_ERR(t)) {
5301 sctp_transport_put(t);
5307 int sctp_for_each_endpoint(int (*cb)(struct sctp_endpoint *, void *),
5311 struct sctp_ep_common *epb;
5312 struct sctp_hashbucket *head;
5314 for (head = sctp_ep_hashtable; hash < sctp_ep_hashsize;
5316 read_lock_bh(&head->lock);
5317 sctp_for_each_hentry(epb, &head->chain) {
5318 err = cb(sctp_ep(epb), p);
5322 read_unlock_bh(&head->lock);
5327 EXPORT_SYMBOL_GPL(sctp_for_each_endpoint);
5329 int sctp_transport_lookup_process(sctp_callback_t cb, struct net *net,
5330 const union sctp_addr *laddr,
5331 const union sctp_addr *paddr, void *p)
5333 struct sctp_transport *transport;
5334 struct sctp_endpoint *ep;
5338 transport = sctp_addrs_lookup_transport(net, laddr, paddr);
5343 ep = transport->asoc->ep;
5344 if (!sctp_endpoint_hold(ep)) { /* asoc can be peeled off */
5345 sctp_transport_put(transport);
5351 err = cb(ep, transport, p);
5352 sctp_endpoint_put(ep);
5353 sctp_transport_put(transport);
5356 EXPORT_SYMBOL_GPL(sctp_transport_lookup_process);
5358 int sctp_transport_traverse_process(sctp_callback_t cb, sctp_callback_t cb_done,
5359 struct net *net, int *pos, void *p)
5361 struct rhashtable_iter hti;
5362 struct sctp_transport *tsp;
5363 struct sctp_endpoint *ep;
5368 sctp_transport_walk_start(&hti);
5370 tsp = sctp_transport_get_idx(net, &hti, *pos + 1);
5371 for (; !IS_ERR_OR_NULL(tsp); tsp = sctp_transport_get_next(net, &hti)) {
5373 if (sctp_endpoint_hold(ep)) { /* asoc can be peeled off */
5374 ret = cb(ep, tsp, p);
5377 sctp_endpoint_put(ep);
5380 sctp_transport_put(tsp);
5382 sctp_transport_walk_stop(&hti);
5385 if (cb_done && !cb_done(ep, tsp, p)) {
5387 sctp_endpoint_put(ep);
5388 sctp_transport_put(tsp);
5391 sctp_endpoint_put(ep);
5392 sctp_transport_put(tsp);
5397 EXPORT_SYMBOL_GPL(sctp_transport_traverse_process);
5399 /* 7.2.1 Association Status (SCTP_STATUS)
5401 * Applications can retrieve current status information about an
5402 * association, including association state, peer receiver window size,
5403 * number of unacked data chunks, and number of data chunks pending
5404 * receipt. This information is read-only.
5406 static int sctp_getsockopt_sctp_status(struct sock *sk, int len,
5407 char __user *optval,
5410 struct sctp_status status;
5411 struct sctp_association *asoc = NULL;
5412 struct sctp_transport *transport;
5413 sctp_assoc_t associd;
5416 if (len < sizeof(status)) {
5421 len = sizeof(status);
5422 if (copy_from_user(&status, optval, len)) {
5427 associd = status.sstat_assoc_id;
5428 asoc = sctp_id2assoc(sk, associd);
5434 transport = asoc->peer.primary_path;
5436 status.sstat_assoc_id = sctp_assoc2id(asoc);
5437 status.sstat_state = sctp_assoc_to_state(asoc);
5438 status.sstat_rwnd = asoc->peer.rwnd;
5439 status.sstat_unackdata = asoc->unack_data;
5441 status.sstat_penddata = sctp_tsnmap_pending(&asoc->peer.tsn_map);
5442 status.sstat_instrms = asoc->stream.incnt;
5443 status.sstat_outstrms = asoc->stream.outcnt;
5444 status.sstat_fragmentation_point = asoc->frag_point;
5445 status.sstat_primary.spinfo_assoc_id = sctp_assoc2id(transport->asoc);
5446 memcpy(&status.sstat_primary.spinfo_address, &transport->ipaddr,
5447 transport->af_specific->sockaddr_len);
5448 /* Map ipv4 address into v4-mapped-on-v6 address. */
5449 sctp_get_pf_specific(sk->sk_family)->addr_to_user(sctp_sk(sk),
5450 (union sctp_addr *)&status.sstat_primary.spinfo_address);
5451 status.sstat_primary.spinfo_state = transport->state;
5452 status.sstat_primary.spinfo_cwnd = transport->cwnd;
5453 status.sstat_primary.spinfo_srtt = transport->srtt;
5454 status.sstat_primary.spinfo_rto = jiffies_to_msecs(transport->rto);
5455 status.sstat_primary.spinfo_mtu = transport->pathmtu;
5457 if (status.sstat_primary.spinfo_state == SCTP_UNKNOWN)
5458 status.sstat_primary.spinfo_state = SCTP_ACTIVE;
5460 if (put_user(len, optlen)) {
5465 pr_debug("%s: len:%d, state:%d, rwnd:%d, assoc_id:%d\n",
5466 __func__, len, status.sstat_state, status.sstat_rwnd,
5467 status.sstat_assoc_id);
5469 if (copy_to_user(optval, &status, len)) {
5479 /* 7.2.2 Peer Address Information (SCTP_GET_PEER_ADDR_INFO)
5481 * Applications can retrieve information about a specific peer address
5482 * of an association, including its reachability state, congestion
5483 * window, and retransmission timer values. This information is
5486 static int sctp_getsockopt_peer_addr_info(struct sock *sk, int len,
5487 char __user *optval,
5490 struct sctp_paddrinfo pinfo;
5491 struct sctp_transport *transport;
5494 if (len < sizeof(pinfo)) {
5499 len = sizeof(pinfo);
5500 if (copy_from_user(&pinfo, optval, len)) {
5505 transport = sctp_addr_id2transport(sk, &pinfo.spinfo_address,
5506 pinfo.spinfo_assoc_id);
5512 if (transport->state == SCTP_PF &&
5513 transport->asoc->pf_expose == SCTP_PF_EXPOSE_DISABLE) {
5518 pinfo.spinfo_assoc_id = sctp_assoc2id(transport->asoc);
5519 pinfo.spinfo_state = transport->state;
5520 pinfo.spinfo_cwnd = transport->cwnd;
5521 pinfo.spinfo_srtt = transport->srtt;
5522 pinfo.spinfo_rto = jiffies_to_msecs(transport->rto);
5523 pinfo.spinfo_mtu = transport->pathmtu;
5525 if (pinfo.spinfo_state == SCTP_UNKNOWN)
5526 pinfo.spinfo_state = SCTP_ACTIVE;
5528 if (put_user(len, optlen)) {
5533 if (copy_to_user(optval, &pinfo, len)) {
5542 /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS)
5544 * This option is a on/off flag. If enabled no SCTP message
5545 * fragmentation will be performed. Instead if a message being sent
5546 * exceeds the current PMTU size, the message will NOT be sent and
5547 * instead a error will be indicated to the user.
5549 static int sctp_getsockopt_disable_fragments(struct sock *sk, int len,
5550 char __user *optval, int __user *optlen)
5554 if (len < sizeof(int))
5558 val = (sctp_sk(sk)->disable_fragments == 1);
5559 if (put_user(len, optlen))
5561 if (copy_to_user(optval, &val, len))
5566 /* 7.1.15 Set notification and ancillary events (SCTP_EVENTS)
5568 * This socket option is used to specify various notifications and
5569 * ancillary data the user wishes to receive.
5571 static int sctp_getsockopt_events(struct sock *sk, int len, char __user *optval,
5574 struct sctp_event_subscribe subscribe;
5575 __u8 *sn_type = (__u8 *)&subscribe;
5580 if (len > sizeof(struct sctp_event_subscribe))
5581 len = sizeof(struct sctp_event_subscribe);
5582 if (put_user(len, optlen))
5585 for (i = 0; i < len; i++)
5586 sn_type[i] = sctp_ulpevent_type_enabled(sctp_sk(sk)->subscribe,
5587 SCTP_SN_TYPE_BASE + i);
5589 if (copy_to_user(optval, &subscribe, len))
5595 /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE)
5597 * This socket option is applicable to the UDP-style socket only. When
5598 * set it will cause associations that are idle for more than the
5599 * specified number of seconds to automatically close. An association
5600 * being idle is defined an association that has NOT sent or received
5601 * user data. The special value of '0' indicates that no automatic
5602 * close of any associations should be performed. The option expects an
5603 * integer defining the number of seconds of idle time before an
5604 * association is closed.
5606 static int sctp_getsockopt_autoclose(struct sock *sk, int len, char __user *optval, int __user *optlen)
5608 /* Applicable to UDP-style socket only */
5609 if (sctp_style(sk, TCP))
5611 if (len < sizeof(int))
5614 if (put_user(len, optlen))
5616 if (put_user(sctp_sk(sk)->autoclose, (int __user *)optval))
5621 /* Helper routine to branch off an association to a new socket. */
5622 int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp)
5624 struct sctp_association *asoc = sctp_id2assoc(sk, id);
5625 struct sctp_sock *sp = sctp_sk(sk);
5626 struct socket *sock;
5629 /* Do not peel off from one netns to another one. */
5630 if (!net_eq(current->nsproxy->net_ns, sock_net(sk)))
5636 /* An association cannot be branched off from an already peeled-off
5637 * socket, nor is this supported for tcp style sockets.
5639 if (!sctp_style(sk, UDP))
5642 /* Create a new socket. */
5643 err = sock_create(sk->sk_family, SOCK_SEQPACKET, IPPROTO_SCTP, &sock);
5647 sctp_copy_sock(sock->sk, sk, asoc);
5649 /* Make peeled-off sockets more like 1-1 accepted sockets.
5650 * Set the daddr and initialize id to something more random and also
5651 * copy over any ip options.
5653 sp->pf->to_sk_daddr(&asoc->peer.primary_addr, sock->sk);
5654 sp->pf->copy_ip_options(sk, sock->sk);
5656 /* Populate the fields of the newsk from the oldsk and migrate the
5657 * asoc to the newsk.
5659 err = sctp_sock_migrate(sk, sock->sk, asoc,
5660 SCTP_SOCKET_UDP_HIGH_BANDWIDTH);
5670 EXPORT_SYMBOL(sctp_do_peeloff);
5672 static int sctp_getsockopt_peeloff_common(struct sock *sk, sctp_peeloff_arg_t *peeloff,
5673 struct file **newfile, unsigned flags)
5675 struct socket *newsock;
5678 retval = sctp_do_peeloff(sk, peeloff->associd, &newsock);
5682 /* Map the socket to an unused fd that can be returned to the user. */
5683 retval = get_unused_fd_flags(flags & SOCK_CLOEXEC);
5685 sock_release(newsock);
5689 *newfile = sock_alloc_file(newsock, 0, NULL);
5690 if (IS_ERR(*newfile)) {
5691 put_unused_fd(retval);
5692 retval = PTR_ERR(*newfile);
5697 pr_debug("%s: sk:%p, newsk:%p, sd:%d\n", __func__, sk, newsock->sk,
5700 peeloff->sd = retval;
5702 if (flags & SOCK_NONBLOCK)
5703 (*newfile)->f_flags |= O_NONBLOCK;
5708 static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval, int __user *optlen)
5710 sctp_peeloff_arg_t peeloff;
5711 struct file *newfile = NULL;
5714 if (len < sizeof(sctp_peeloff_arg_t))
5716 len = sizeof(sctp_peeloff_arg_t);
5717 if (copy_from_user(&peeloff, optval, len))
5720 retval = sctp_getsockopt_peeloff_common(sk, &peeloff, &newfile, 0);
5724 /* Return the fd mapped to the new socket. */
5725 if (put_user(len, optlen)) {
5727 put_unused_fd(retval);
5731 if (copy_to_user(optval, &peeloff, len)) {
5733 put_unused_fd(retval);
5736 fd_install(retval, newfile);
5741 static int sctp_getsockopt_peeloff_flags(struct sock *sk, int len,
5742 char __user *optval, int __user *optlen)
5744 sctp_peeloff_flags_arg_t peeloff;
5745 struct file *newfile = NULL;
5748 if (len < sizeof(sctp_peeloff_flags_arg_t))
5750 len = sizeof(sctp_peeloff_flags_arg_t);
5751 if (copy_from_user(&peeloff, optval, len))
5754 retval = sctp_getsockopt_peeloff_common(sk, &peeloff.p_arg,
5755 &newfile, peeloff.flags);
5759 /* Return the fd mapped to the new socket. */
5760 if (put_user(len, optlen)) {
5762 put_unused_fd(retval);
5766 if (copy_to_user(optval, &peeloff, len)) {
5768 put_unused_fd(retval);
5771 fd_install(retval, newfile);
5776 /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS)
5778 * Applications can enable or disable heartbeats for any peer address of
5779 * an association, modify an address's heartbeat interval, force a
5780 * heartbeat to be sent immediately, and adjust the address's maximum
5781 * number of retransmissions sent before an address is considered
5782 * unreachable. The following structure is used to access and modify an
5783 * address's parameters:
5785 * struct sctp_paddrparams {
5786 * sctp_assoc_t spp_assoc_id;
5787 * struct sockaddr_storage spp_address;
5788 * uint32_t spp_hbinterval;
5789 * uint16_t spp_pathmaxrxt;
5790 * uint32_t spp_pathmtu;
5791 * uint32_t spp_sackdelay;
5792 * uint32_t spp_flags;
5795 * spp_assoc_id - (one-to-many style socket) This is filled in the
5796 * application, and identifies the association for
5798 * spp_address - This specifies which address is of interest.
5799 * spp_hbinterval - This contains the value of the heartbeat interval,
5800 * in milliseconds. If a value of zero
5801 * is present in this field then no changes are to
5802 * be made to this parameter.
5803 * spp_pathmaxrxt - This contains the maximum number of
5804 * retransmissions before this address shall be
5805 * considered unreachable. If a value of zero
5806 * is present in this field then no changes are to
5807 * be made to this parameter.
5808 * spp_pathmtu - When Path MTU discovery is disabled the value
5809 * specified here will be the "fixed" path mtu.
5810 * Note that if the spp_address field is empty
5811 * then all associations on this address will
5812 * have this fixed path mtu set upon them.
5814 * spp_sackdelay - When delayed sack is enabled, this value specifies
5815 * the number of milliseconds that sacks will be delayed
5816 * for. This value will apply to all addresses of an
5817 * association if the spp_address field is empty. Note
5818 * also, that if delayed sack is enabled and this
5819 * value is set to 0, no change is made to the last
5820 * recorded delayed sack timer value.
5822 * spp_flags - These flags are used to control various features
5823 * on an association. The flag field may contain
5824 * zero or more of the following options.
5826 * SPP_HB_ENABLE - Enable heartbeats on the
5827 * specified address. Note that if the address
5828 * field is empty all addresses for the association
5829 * have heartbeats enabled upon them.
5831 * SPP_HB_DISABLE - Disable heartbeats on the
5832 * speicifed address. Note that if the address
5833 * field is empty all addresses for the association
5834 * will have their heartbeats disabled. Note also
5835 * that SPP_HB_ENABLE and SPP_HB_DISABLE are
5836 * mutually exclusive, only one of these two should
5837 * be specified. Enabling both fields will have
5838 * undetermined results.
5840 * SPP_HB_DEMAND - Request a user initiated heartbeat
5841 * to be made immediately.
5843 * SPP_PMTUD_ENABLE - This field will enable PMTU
5844 * discovery upon the specified address. Note that
5845 * if the address feild is empty then all addresses
5846 * on the association are effected.
5848 * SPP_PMTUD_DISABLE - This field will disable PMTU
5849 * discovery upon the specified address. Note that
5850 * if the address feild is empty then all addresses
5851 * on the association are effected. Not also that
5852 * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually
5853 * exclusive. Enabling both will have undetermined
5856 * SPP_SACKDELAY_ENABLE - Setting this flag turns
5857 * on delayed sack. The time specified in spp_sackdelay
5858 * is used to specify the sack delay for this address. Note
5859 * that if spp_address is empty then all addresses will
5860 * enable delayed sack and take on the sack delay
5861 * value specified in spp_sackdelay.
5862 * SPP_SACKDELAY_DISABLE - Setting this flag turns
5863 * off delayed sack. If the spp_address field is blank then
5864 * delayed sack is disabled for the entire association. Note
5865 * also that this field is mutually exclusive to
5866 * SPP_SACKDELAY_ENABLE, setting both will have undefined
5869 * SPP_IPV6_FLOWLABEL: Setting this flag enables the
5870 * setting of the IPV6 flow label value. The value is
5871 * contained in the spp_ipv6_flowlabel field.
5872 * Upon retrieval, this flag will be set to indicate that
5873 * the spp_ipv6_flowlabel field has a valid value returned.
5874 * If a specific destination address is set (in the
5875 * spp_address field), then the value returned is that of
5876 * the address. If just an association is specified (and
5877 * no address), then the association's default flow label
5878 * is returned. If neither an association nor a destination
5879 * is specified, then the socket's default flow label is
5880 * returned. For non-IPv6 sockets, this flag will be left
5883 * SPP_DSCP: Setting this flag enables the setting of the
5884 * Differentiated Services Code Point (DSCP) value
5885 * associated with either the association or a specific
5886 * address. The value is obtained in the spp_dscp field.
5887 * Upon retrieval, this flag will be set to indicate that
5888 * the spp_dscp field has a valid value returned. If a
5889 * specific destination address is set when called (in the
5890 * spp_address field), then that specific destination
5891 * address's DSCP value is returned. If just an association
5892 * is specified, then the association's default DSCP is
5893 * returned. If neither an association nor a destination is
5894 * specified, then the socket's default DSCP is returned.
5896 * spp_ipv6_flowlabel
5897 * - This field is used in conjunction with the
5898 * SPP_IPV6_FLOWLABEL flag and contains the IPv6 flow label.
5899 * The 20 least significant bits are used for the flow
5900 * label. This setting has precedence over any IPv6-layer
5903 * spp_dscp - This field is used in conjunction with the SPP_DSCP flag
5904 * and contains the DSCP. The 6 most significant bits are
5905 * used for the DSCP. This setting has precedence over any
5906 * IPv4- or IPv6- layer setting.
5908 static int sctp_getsockopt_peer_addr_params(struct sock *sk, int len,
5909 char __user *optval, int __user *optlen)
5911 struct sctp_paddrparams params;
5912 struct sctp_transport *trans = NULL;
5913 struct sctp_association *asoc = NULL;
5914 struct sctp_sock *sp = sctp_sk(sk);
5916 if (len >= sizeof(params))
5917 len = sizeof(params);
5918 else if (len >= ALIGN(offsetof(struct sctp_paddrparams,
5919 spp_ipv6_flowlabel), 4))
5920 len = ALIGN(offsetof(struct sctp_paddrparams,
5921 spp_ipv6_flowlabel), 4);
5925 if (copy_from_user(¶ms, optval, len))
5928 /* If an address other than INADDR_ANY is specified, and
5929 * no transport is found, then the request is invalid.
5931 if (!sctp_is_any(sk, (union sctp_addr *)¶ms.spp_address)) {
5932 trans = sctp_addr_id2transport(sk, ¶ms.spp_address,
5933 params.spp_assoc_id);
5935 pr_debug("%s: failed no transport\n", __func__);
5940 /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
5941 * socket is a one to many style socket, and an association
5942 * was not found, then the id was invalid.
5944 asoc = sctp_id2assoc(sk, params.spp_assoc_id);
5945 if (!asoc && params.spp_assoc_id != SCTP_FUTURE_ASSOC &&
5946 sctp_style(sk, UDP)) {
5947 pr_debug("%s: failed no association\n", __func__);
5952 /* Fetch transport values. */
5953 params.spp_hbinterval = jiffies_to_msecs(trans->hbinterval);
5954 params.spp_pathmtu = trans->pathmtu;
5955 params.spp_pathmaxrxt = trans->pathmaxrxt;
5956 params.spp_sackdelay = jiffies_to_msecs(trans->sackdelay);
5958 /*draft-11 doesn't say what to return in spp_flags*/
5959 params.spp_flags = trans->param_flags;
5960 if (trans->flowlabel & SCTP_FLOWLABEL_SET_MASK) {
5961 params.spp_ipv6_flowlabel = trans->flowlabel &
5962 SCTP_FLOWLABEL_VAL_MASK;
5963 params.spp_flags |= SPP_IPV6_FLOWLABEL;
5965 if (trans->dscp & SCTP_DSCP_SET_MASK) {
5966 params.spp_dscp = trans->dscp & SCTP_DSCP_VAL_MASK;
5967 params.spp_flags |= SPP_DSCP;
5970 /* Fetch association values. */
5971 params.spp_hbinterval = jiffies_to_msecs(asoc->hbinterval);
5972 params.spp_pathmtu = asoc->pathmtu;
5973 params.spp_pathmaxrxt = asoc->pathmaxrxt;
5974 params.spp_sackdelay = jiffies_to_msecs(asoc->sackdelay);
5976 /*draft-11 doesn't say what to return in spp_flags*/
5977 params.spp_flags = asoc->param_flags;
5978 if (asoc->flowlabel & SCTP_FLOWLABEL_SET_MASK) {
5979 params.spp_ipv6_flowlabel = asoc->flowlabel &
5980 SCTP_FLOWLABEL_VAL_MASK;
5981 params.spp_flags |= SPP_IPV6_FLOWLABEL;
5983 if (asoc->dscp & SCTP_DSCP_SET_MASK) {
5984 params.spp_dscp = asoc->dscp & SCTP_DSCP_VAL_MASK;
5985 params.spp_flags |= SPP_DSCP;
5988 /* Fetch socket values. */
5989 params.spp_hbinterval = sp->hbinterval;
5990 params.spp_pathmtu = sp->pathmtu;
5991 params.spp_sackdelay = sp->sackdelay;
5992 params.spp_pathmaxrxt = sp->pathmaxrxt;
5994 /*draft-11 doesn't say what to return in spp_flags*/
5995 params.spp_flags = sp->param_flags;
5996 if (sp->flowlabel & SCTP_FLOWLABEL_SET_MASK) {
5997 params.spp_ipv6_flowlabel = sp->flowlabel &
5998 SCTP_FLOWLABEL_VAL_MASK;
5999 params.spp_flags |= SPP_IPV6_FLOWLABEL;
6001 if (sp->dscp & SCTP_DSCP_SET_MASK) {
6002 params.spp_dscp = sp->dscp & SCTP_DSCP_VAL_MASK;
6003 params.spp_flags |= SPP_DSCP;
6007 if (copy_to_user(optval, ¶ms, len))
6010 if (put_user(len, optlen))
6017 * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK)
6019 * This option will effect the way delayed acks are performed. This
6020 * option allows you to get or set the delayed ack time, in
6021 * milliseconds. It also allows changing the delayed ack frequency.
6022 * Changing the frequency to 1 disables the delayed sack algorithm. If
6023 * the assoc_id is 0, then this sets or gets the endpoints default
6024 * values. If the assoc_id field is non-zero, then the set or get
6025 * effects the specified association for the one to many model (the
6026 * assoc_id field is ignored by the one to one model). Note that if
6027 * sack_delay or sack_freq are 0 when setting this option, then the
6028 * current values will remain unchanged.
6030 * struct sctp_sack_info {
6031 * sctp_assoc_t sack_assoc_id;
6032 * uint32_t sack_delay;
6033 * uint32_t sack_freq;
6036 * sack_assoc_id - This parameter, indicates which association the user
6037 * is performing an action upon. Note that if this field's value is
6038 * zero then the endpoints default value is changed (effecting future
6039 * associations only).
6041 * sack_delay - This parameter contains the number of milliseconds that
6042 * the user is requesting the delayed ACK timer be set to. Note that
6043 * this value is defined in the standard to be between 200 and 500
6046 * sack_freq - This parameter contains the number of packets that must
6047 * be received before a sack is sent without waiting for the delay
6048 * timer to expire. The default value for this is 2, setting this
6049 * value to 1 will disable the delayed sack algorithm.
6051 static int sctp_getsockopt_delayed_ack(struct sock *sk, int len,
6052 char __user *optval,
6055 struct sctp_sack_info params;
6056 struct sctp_association *asoc = NULL;
6057 struct sctp_sock *sp = sctp_sk(sk);
6059 if (len >= sizeof(struct sctp_sack_info)) {
6060 len = sizeof(struct sctp_sack_info);
6062 if (copy_from_user(¶ms, optval, len))
6064 } else if (len == sizeof(struct sctp_assoc_value)) {
6065 pr_warn_ratelimited(DEPRECATED
6067 "Use of struct sctp_assoc_value in delayed_ack socket option.\n"
6068 "Use struct sctp_sack_info instead\n",
6069 current->comm, task_pid_nr(current));
6070 if (copy_from_user(¶ms, optval, len))
6075 /* Get association, if sack_assoc_id != SCTP_FUTURE_ASSOC and the
6076 * socket is a one to many style socket, and an association
6077 * was not found, then the id was invalid.
6079 asoc = sctp_id2assoc(sk, params.sack_assoc_id);
6080 if (!asoc && params.sack_assoc_id != SCTP_FUTURE_ASSOC &&
6081 sctp_style(sk, UDP))
6085 /* Fetch association values. */
6086 if (asoc->param_flags & SPP_SACKDELAY_ENABLE) {
6087 params.sack_delay = jiffies_to_msecs(asoc->sackdelay);
6088 params.sack_freq = asoc->sackfreq;
6091 params.sack_delay = 0;
6092 params.sack_freq = 1;
6095 /* Fetch socket values. */
6096 if (sp->param_flags & SPP_SACKDELAY_ENABLE) {
6097 params.sack_delay = sp->sackdelay;
6098 params.sack_freq = sp->sackfreq;
6100 params.sack_delay = 0;
6101 params.sack_freq = 1;
6105 if (copy_to_user(optval, ¶ms, len))
6108 if (put_user(len, optlen))
6114 /* 7.1.3 Initialization Parameters (SCTP_INITMSG)
6116 * Applications can specify protocol parameters for the default association
6117 * initialization. The option name argument to setsockopt() and getsockopt()
6120 * Setting initialization parameters is effective only on an unconnected
6121 * socket (for UDP-style sockets only future associations are effected
6122 * by the change). With TCP-style sockets, this option is inherited by
6123 * sockets derived from a listener socket.
6125 static int sctp_getsockopt_initmsg(struct sock *sk, int len, char __user *optval, int __user *optlen)
6127 if (len < sizeof(struct sctp_initmsg))
6129 len = sizeof(struct sctp_initmsg);
6130 if (put_user(len, optlen))
6132 if (copy_to_user(optval, &sctp_sk(sk)->initmsg, len))
6138 static int sctp_getsockopt_peer_addrs(struct sock *sk, int len,
6139 char __user *optval, int __user *optlen)
6141 struct sctp_association *asoc;
6143 struct sctp_getaddrs getaddrs;
6144 struct sctp_transport *from;
6146 union sctp_addr temp;
6147 struct sctp_sock *sp = sctp_sk(sk);
6152 if (len < sizeof(struct sctp_getaddrs))
6155 if (copy_from_user(&getaddrs, optval, sizeof(struct sctp_getaddrs)))
6158 /* For UDP-style sockets, id specifies the association to query. */
6159 asoc = sctp_id2assoc(sk, getaddrs.assoc_id);
6163 to = optval + offsetof(struct sctp_getaddrs, addrs);
6164 space_left = len - offsetof(struct sctp_getaddrs, addrs);
6166 list_for_each_entry(from, &asoc->peer.transport_addr_list,
6168 memcpy(&temp, &from->ipaddr, sizeof(temp));
6169 addrlen = sctp_get_pf_specific(sk->sk_family)
6170 ->addr_to_user(sp, &temp);
6171 if (space_left < addrlen)
6173 if (copy_to_user(to, &temp, addrlen))
6177 space_left -= addrlen;
6180 if (put_user(cnt, &((struct sctp_getaddrs __user *)optval)->addr_num))
6182 bytes_copied = ((char __user *)to) - optval;
6183 if (put_user(bytes_copied, optlen))
6189 static int sctp_copy_laddrs(struct sock *sk, __u16 port, void *to,
6190 size_t space_left, int *bytes_copied)
6192 struct sctp_sockaddr_entry *addr;
6193 union sctp_addr temp;
6196 struct net *net = sock_net(sk);
6199 list_for_each_entry_rcu(addr, &net->sctp.local_addr_list, list) {
6203 if ((PF_INET == sk->sk_family) &&
6204 (AF_INET6 == addr->a.sa.sa_family))
6206 if ((PF_INET6 == sk->sk_family) &&
6207 inet_v6_ipv6only(sk) &&
6208 (AF_INET == addr->a.sa.sa_family))
6210 memcpy(&temp, &addr->a, sizeof(temp));
6211 if (!temp.v4.sin_port)
6212 temp.v4.sin_port = htons(port);
6214 addrlen = sctp_get_pf_specific(sk->sk_family)
6215 ->addr_to_user(sctp_sk(sk), &temp);
6217 if (space_left < addrlen) {
6221 memcpy(to, &temp, addrlen);
6225 space_left -= addrlen;
6226 *bytes_copied += addrlen;
6234 static int sctp_getsockopt_local_addrs(struct sock *sk, int len,
6235 char __user *optval, int __user *optlen)
6237 struct sctp_bind_addr *bp;
6238 struct sctp_association *asoc;
6240 struct sctp_getaddrs getaddrs;
6241 struct sctp_sockaddr_entry *addr;
6243 union sctp_addr temp;
6244 struct sctp_sock *sp = sctp_sk(sk);
6248 int bytes_copied = 0;
6252 if (len < sizeof(struct sctp_getaddrs))
6255 if (copy_from_user(&getaddrs, optval, sizeof(struct sctp_getaddrs)))
6259 * For UDP-style sockets, id specifies the association to query.
6260 * If the id field is set to the value '0' then the locally bound
6261 * addresses are returned without regard to any particular
6264 if (0 == getaddrs.assoc_id) {
6265 bp = &sctp_sk(sk)->ep->base.bind_addr;
6267 asoc = sctp_id2assoc(sk, getaddrs.assoc_id);
6270 bp = &asoc->base.bind_addr;
6273 to = optval + offsetof(struct sctp_getaddrs, addrs);
6274 space_left = len - offsetof(struct sctp_getaddrs, addrs);
6276 addrs = kmalloc(space_left, GFP_USER | __GFP_NOWARN);
6280 /* If the endpoint is bound to 0.0.0.0 or ::0, get the valid
6281 * addresses from the global local address list.
6283 if (sctp_list_single_entry(&bp->address_list)) {
6284 addr = list_entry(bp->address_list.next,
6285 struct sctp_sockaddr_entry, list);
6286 if (sctp_is_any(sk, &addr->a)) {
6287 cnt = sctp_copy_laddrs(sk, bp->port, addrs,
6288 space_left, &bytes_copied);
6298 /* Protection on the bound address list is not needed since
6299 * in the socket option context we hold a socket lock and
6300 * thus the bound address list can't change.
6302 list_for_each_entry(addr, &bp->address_list, list) {
6303 memcpy(&temp, &addr->a, sizeof(temp));
6304 addrlen = sctp_get_pf_specific(sk->sk_family)
6305 ->addr_to_user(sp, &temp);
6306 if (space_left < addrlen) {
6307 err = -ENOMEM; /*fixme: right error?*/
6310 memcpy(buf, &temp, addrlen);
6312 bytes_copied += addrlen;
6314 space_left -= addrlen;
6318 if (copy_to_user(to, addrs, bytes_copied)) {
6322 if (put_user(cnt, &((struct sctp_getaddrs __user *)optval)->addr_num)) {
6326 /* XXX: We should have accounted for sizeof(struct sctp_getaddrs) too,
6327 * but we can't change it anymore.
6329 if (put_user(bytes_copied, optlen))
6336 /* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
6338 * Requests that the local SCTP stack use the enclosed peer address as
6339 * the association primary. The enclosed address must be one of the
6340 * association peer's addresses.
6342 static int sctp_getsockopt_primary_addr(struct sock *sk, int len,
6343 char __user *optval, int __user *optlen)
6345 struct sctp_prim prim;
6346 struct sctp_association *asoc;
6347 struct sctp_sock *sp = sctp_sk(sk);
6349 if (len < sizeof(struct sctp_prim))
6352 len = sizeof(struct sctp_prim);
6354 if (copy_from_user(&prim, optval, len))
6357 asoc = sctp_id2assoc(sk, prim.ssp_assoc_id);
6361 if (!asoc->peer.primary_path)
6364 memcpy(&prim.ssp_addr, &asoc->peer.primary_path->ipaddr,
6365 asoc->peer.primary_path->af_specific->sockaddr_len);
6367 sctp_get_pf_specific(sk->sk_family)->addr_to_user(sp,
6368 (union sctp_addr *)&prim.ssp_addr);
6370 if (put_user(len, optlen))
6372 if (copy_to_user(optval, &prim, len))
6379 * 7.1.11 Set Adaptation Layer Indicator (SCTP_ADAPTATION_LAYER)
6381 * Requests that the local endpoint set the specified Adaptation Layer
6382 * Indication parameter for all future INIT and INIT-ACK exchanges.
6384 static int sctp_getsockopt_adaptation_layer(struct sock *sk, int len,
6385 char __user *optval, int __user *optlen)
6387 struct sctp_setadaptation adaptation;
6389 if (len < sizeof(struct sctp_setadaptation))
6392 len = sizeof(struct sctp_setadaptation);
6394 adaptation.ssb_adaptation_ind = sctp_sk(sk)->adaptation_ind;
6396 if (put_user(len, optlen))
6398 if (copy_to_user(optval, &adaptation, len))
6406 * 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM)
6408 * Applications that wish to use the sendto() system call may wish to
6409 * specify a default set of parameters that would normally be supplied
6410 * through the inclusion of ancillary data. This socket option allows
6411 * such an application to set the default sctp_sndrcvinfo structure.
6414 * The application that wishes to use this socket option simply passes
6415 * in to this call the sctp_sndrcvinfo structure defined in Section
6416 * 5.2.2) The input parameters accepted by this call include
6417 * sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context,
6418 * sinfo_timetolive. The user must provide the sinfo_assoc_id field in
6419 * to this call if the caller is using the UDP model.
6421 * For getsockopt, it get the default sctp_sndrcvinfo structure.
6423 static int sctp_getsockopt_default_send_param(struct sock *sk,
6424 int len, char __user *optval,
6427 struct sctp_sock *sp = sctp_sk(sk);
6428 struct sctp_association *asoc;
6429 struct sctp_sndrcvinfo info;
6431 if (len < sizeof(info))
6436 if (copy_from_user(&info, optval, len))
6439 asoc = sctp_id2assoc(sk, info.sinfo_assoc_id);
6440 if (!asoc && info.sinfo_assoc_id != SCTP_FUTURE_ASSOC &&
6441 sctp_style(sk, UDP))
6445 info.sinfo_stream = asoc->default_stream;
6446 info.sinfo_flags = asoc->default_flags;
6447 info.sinfo_ppid = asoc->default_ppid;
6448 info.sinfo_context = asoc->default_context;
6449 info.sinfo_timetolive = asoc->default_timetolive;
6451 info.sinfo_stream = sp->default_stream;
6452 info.sinfo_flags = sp->default_flags;
6453 info.sinfo_ppid = sp->default_ppid;
6454 info.sinfo_context = sp->default_context;
6455 info.sinfo_timetolive = sp->default_timetolive;
6458 if (put_user(len, optlen))
6460 if (copy_to_user(optval, &info, len))
6466 /* RFC6458, Section 8.1.31. Set/get Default Send Parameters
6467 * (SCTP_DEFAULT_SNDINFO)
6469 static int sctp_getsockopt_default_sndinfo(struct sock *sk, int len,
6470 char __user *optval,
6473 struct sctp_sock *sp = sctp_sk(sk);
6474 struct sctp_association *asoc;
6475 struct sctp_sndinfo info;
6477 if (len < sizeof(info))
6482 if (copy_from_user(&info, optval, len))
6485 asoc = sctp_id2assoc(sk, info.snd_assoc_id);
6486 if (!asoc && info.snd_assoc_id != SCTP_FUTURE_ASSOC &&
6487 sctp_style(sk, UDP))
6491 info.snd_sid = asoc->default_stream;
6492 info.snd_flags = asoc->default_flags;
6493 info.snd_ppid = asoc->default_ppid;
6494 info.snd_context = asoc->default_context;
6496 info.snd_sid = sp->default_stream;
6497 info.snd_flags = sp->default_flags;
6498 info.snd_ppid = sp->default_ppid;
6499 info.snd_context = sp->default_context;
6502 if (put_user(len, optlen))
6504 if (copy_to_user(optval, &info, len))
6512 * 7.1.5 SCTP_NODELAY
6514 * Turn on/off any Nagle-like algorithm. This means that packets are
6515 * generally sent as soon as possible and no unnecessary delays are
6516 * introduced, at the cost of more packets in the network. Expects an
6517 * integer boolean flag.
6520 static int sctp_getsockopt_nodelay(struct sock *sk, int len,
6521 char __user *optval, int __user *optlen)
6525 if (len < sizeof(int))
6529 val = (sctp_sk(sk)->nodelay == 1);
6530 if (put_user(len, optlen))
6532 if (copy_to_user(optval, &val, len))
6539 * 7.1.1 SCTP_RTOINFO
6541 * The protocol parameters used to initialize and bound retransmission
6542 * timeout (RTO) are tunable. sctp_rtoinfo structure is used to access
6543 * and modify these parameters.
6544 * All parameters are time values, in milliseconds. A value of 0, when
6545 * modifying the parameters, indicates that the current value should not
6549 static int sctp_getsockopt_rtoinfo(struct sock *sk, int len,
6550 char __user *optval,
6551 int __user *optlen) {
6552 struct sctp_rtoinfo rtoinfo;
6553 struct sctp_association *asoc;
6555 if (len < sizeof (struct sctp_rtoinfo))
6558 len = sizeof(struct sctp_rtoinfo);
6560 if (copy_from_user(&rtoinfo, optval, len))
6563 asoc = sctp_id2assoc(sk, rtoinfo.srto_assoc_id);
6565 if (!asoc && rtoinfo.srto_assoc_id != SCTP_FUTURE_ASSOC &&
6566 sctp_style(sk, UDP))
6569 /* Values corresponding to the specific association. */
6571 rtoinfo.srto_initial = jiffies_to_msecs(asoc->rto_initial);
6572 rtoinfo.srto_max = jiffies_to_msecs(asoc->rto_max);
6573 rtoinfo.srto_min = jiffies_to_msecs(asoc->rto_min);
6575 /* Values corresponding to the endpoint. */
6576 struct sctp_sock *sp = sctp_sk(sk);
6578 rtoinfo.srto_initial = sp->rtoinfo.srto_initial;
6579 rtoinfo.srto_max = sp->rtoinfo.srto_max;
6580 rtoinfo.srto_min = sp->rtoinfo.srto_min;
6583 if (put_user(len, optlen))
6586 if (copy_to_user(optval, &rtoinfo, len))
6594 * 7.1.2 SCTP_ASSOCINFO
6596 * This option is used to tune the maximum retransmission attempts
6597 * of the association.
6598 * Returns an error if the new association retransmission value is
6599 * greater than the sum of the retransmission value of the peer.
6600 * See [SCTP] for more information.
6603 static int sctp_getsockopt_associnfo(struct sock *sk, int len,
6604 char __user *optval,
6608 struct sctp_assocparams assocparams;
6609 struct sctp_association *asoc;
6610 struct list_head *pos;
6613 if (len < sizeof (struct sctp_assocparams))
6616 len = sizeof(struct sctp_assocparams);
6618 if (copy_from_user(&assocparams, optval, len))
6621 asoc = sctp_id2assoc(sk, assocparams.sasoc_assoc_id);
6623 if (!asoc && assocparams.sasoc_assoc_id != SCTP_FUTURE_ASSOC &&
6624 sctp_style(sk, UDP))
6627 /* Values correspoinding to the specific association */
6629 assocparams.sasoc_asocmaxrxt = asoc->max_retrans;
6630 assocparams.sasoc_peer_rwnd = asoc->peer.rwnd;
6631 assocparams.sasoc_local_rwnd = asoc->a_rwnd;
6632 assocparams.sasoc_cookie_life = ktime_to_ms(asoc->cookie_life);
6634 list_for_each(pos, &asoc->peer.transport_addr_list) {
6638 assocparams.sasoc_number_peer_destinations = cnt;
6640 /* Values corresponding to the endpoint */
6641 struct sctp_sock *sp = sctp_sk(sk);
6643 assocparams.sasoc_asocmaxrxt = sp->assocparams.sasoc_asocmaxrxt;
6644 assocparams.sasoc_peer_rwnd = sp->assocparams.sasoc_peer_rwnd;
6645 assocparams.sasoc_local_rwnd = sp->assocparams.sasoc_local_rwnd;
6646 assocparams.sasoc_cookie_life =
6647 sp->assocparams.sasoc_cookie_life;
6648 assocparams.sasoc_number_peer_destinations =
6650 sasoc_number_peer_destinations;
6653 if (put_user(len, optlen))
6656 if (copy_to_user(optval, &assocparams, len))
6663 * 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR)
6665 * This socket option is a boolean flag which turns on or off mapped V4
6666 * addresses. If this option is turned on and the socket is type
6667 * PF_INET6, then IPv4 addresses will be mapped to V6 representation.
6668 * If this option is turned off, then no mapping will be done of V4
6669 * addresses and a user will receive both PF_INET6 and PF_INET type
6670 * addresses on the socket.
6672 static int sctp_getsockopt_mappedv4(struct sock *sk, int len,
6673 char __user *optval, int __user *optlen)
6676 struct sctp_sock *sp = sctp_sk(sk);
6678 if (len < sizeof(int))
6683 if (put_user(len, optlen))
6685 if (copy_to_user(optval, &val, len))
6692 * 7.1.29. Set or Get the default context (SCTP_CONTEXT)
6693 * (chapter and verse is quoted at sctp_setsockopt_context())
6695 static int sctp_getsockopt_context(struct sock *sk, int len,
6696 char __user *optval, int __user *optlen)
6698 struct sctp_assoc_value params;
6699 struct sctp_association *asoc;
6701 if (len < sizeof(struct sctp_assoc_value))
6704 len = sizeof(struct sctp_assoc_value);
6706 if (copy_from_user(¶ms, optval, len))
6709 asoc = sctp_id2assoc(sk, params.assoc_id);
6710 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
6711 sctp_style(sk, UDP))
6714 params.assoc_value = asoc ? asoc->default_rcv_context
6715 : sctp_sk(sk)->default_rcv_context;
6717 if (put_user(len, optlen))
6719 if (copy_to_user(optval, ¶ms, len))
6726 * 8.1.16. Get or Set the Maximum Fragmentation Size (SCTP_MAXSEG)
6727 * This option will get or set the maximum size to put in any outgoing
6728 * SCTP DATA chunk. If a message is larger than this size it will be
6729 * fragmented by SCTP into the specified size. Note that the underlying
6730 * SCTP implementation may fragment into smaller sized chunks when the
6731 * PMTU of the underlying association is smaller than the value set by
6732 * the user. The default value for this option is '0' which indicates
6733 * the user is NOT limiting fragmentation and only the PMTU will effect
6734 * SCTP's choice of DATA chunk size. Note also that values set larger
6735 * than the maximum size of an IP datagram will effectively let SCTP
6736 * control fragmentation (i.e. the same as setting this option to 0).
6738 * The following structure is used to access and modify this parameter:
6740 * struct sctp_assoc_value {
6741 * sctp_assoc_t assoc_id;
6742 * uint32_t assoc_value;
6745 * assoc_id: This parameter is ignored for one-to-one style sockets.
6746 * For one-to-many style sockets this parameter indicates which
6747 * association the user is performing an action upon. Note that if
6748 * this field's value is zero then the endpoints default value is
6749 * changed (effecting future associations only).
6750 * assoc_value: This parameter specifies the maximum size in bytes.
6752 static int sctp_getsockopt_maxseg(struct sock *sk, int len,
6753 char __user *optval, int __user *optlen)
6755 struct sctp_assoc_value params;
6756 struct sctp_association *asoc;
6758 if (len == sizeof(int)) {
6759 pr_warn_ratelimited(DEPRECATED
6761 "Use of int in maxseg socket option.\n"
6762 "Use struct sctp_assoc_value instead\n",
6763 current->comm, task_pid_nr(current));
6764 params.assoc_id = SCTP_FUTURE_ASSOC;
6765 } else if (len >= sizeof(struct sctp_assoc_value)) {
6766 len = sizeof(struct sctp_assoc_value);
6767 if (copy_from_user(¶ms, optval, len))
6772 asoc = sctp_id2assoc(sk, params.assoc_id);
6773 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
6774 sctp_style(sk, UDP))
6778 params.assoc_value = asoc->frag_point;
6780 params.assoc_value = sctp_sk(sk)->user_frag;
6782 if (put_user(len, optlen))
6784 if (len == sizeof(int)) {
6785 if (copy_to_user(optval, ¶ms.assoc_value, len))
6788 if (copy_to_user(optval, ¶ms, len))
6796 * 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE)
6797 * (chapter and verse is quoted at sctp_setsockopt_fragment_interleave())
6799 static int sctp_getsockopt_fragment_interleave(struct sock *sk, int len,
6800 char __user *optval, int __user *optlen)
6804 if (len < sizeof(int))
6809 val = sctp_sk(sk)->frag_interleave;
6810 if (put_user(len, optlen))
6812 if (copy_to_user(optval, &val, len))
6819 * 7.1.25. Set or Get the sctp partial delivery point
6820 * (chapter and verse is quoted at sctp_setsockopt_partial_delivery_point())
6822 static int sctp_getsockopt_partial_delivery_point(struct sock *sk, int len,
6823 char __user *optval,
6828 if (len < sizeof(u32))
6833 val = sctp_sk(sk)->pd_point;
6834 if (put_user(len, optlen))
6836 if (copy_to_user(optval, &val, len))
6843 * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST)
6844 * (chapter and verse is quoted at sctp_setsockopt_maxburst())
6846 static int sctp_getsockopt_maxburst(struct sock *sk, int len,
6847 char __user *optval,
6850 struct sctp_assoc_value params;
6851 struct sctp_association *asoc;
6853 if (len == sizeof(int)) {
6854 pr_warn_ratelimited(DEPRECATED
6856 "Use of int in max_burst socket option.\n"
6857 "Use struct sctp_assoc_value instead\n",
6858 current->comm, task_pid_nr(current));
6859 params.assoc_id = SCTP_FUTURE_ASSOC;
6860 } else if (len >= sizeof(struct sctp_assoc_value)) {
6861 len = sizeof(struct sctp_assoc_value);
6862 if (copy_from_user(¶ms, optval, len))
6867 asoc = sctp_id2assoc(sk, params.assoc_id);
6868 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
6869 sctp_style(sk, UDP))
6872 params.assoc_value = asoc ? asoc->max_burst : sctp_sk(sk)->max_burst;
6874 if (len == sizeof(int)) {
6875 if (copy_to_user(optval, ¶ms.assoc_value, len))
6878 if (copy_to_user(optval, ¶ms, len))
6886 static int sctp_getsockopt_hmac_ident(struct sock *sk, int len,
6887 char __user *optval, int __user *optlen)
6889 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
6890 struct sctp_hmacalgo __user *p = (void __user *)optval;
6891 struct sctp_hmac_algo_param *hmacs;
6896 if (!ep->auth_enable)
6899 hmacs = ep->auth_hmacs_list;
6900 data_len = ntohs(hmacs->param_hdr.length) -
6901 sizeof(struct sctp_paramhdr);
6903 if (len < sizeof(struct sctp_hmacalgo) + data_len)
6906 len = sizeof(struct sctp_hmacalgo) + data_len;
6907 num_idents = data_len / sizeof(u16);
6909 if (put_user(len, optlen))
6911 if (put_user(num_idents, &p->shmac_num_idents))
6913 for (i = 0; i < num_idents; i++) {
6914 __u16 hmacid = ntohs(hmacs->hmac_ids[i]);
6916 if (copy_to_user(&p->shmac_idents[i], &hmacid, sizeof(__u16)))
6922 static int sctp_getsockopt_active_key(struct sock *sk, int len,
6923 char __user *optval, int __user *optlen)
6925 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
6926 struct sctp_authkeyid val;
6927 struct sctp_association *asoc;
6929 if (len < sizeof(struct sctp_authkeyid))
6932 len = sizeof(struct sctp_authkeyid);
6933 if (copy_from_user(&val, optval, len))
6936 asoc = sctp_id2assoc(sk, val.scact_assoc_id);
6937 if (!asoc && val.scact_assoc_id && sctp_style(sk, UDP))
6941 if (!asoc->peer.auth_capable)
6943 val.scact_keynumber = asoc->active_key_id;
6945 if (!ep->auth_enable)
6947 val.scact_keynumber = ep->active_key_id;
6950 if (put_user(len, optlen))
6952 if (copy_to_user(optval, &val, len))
6958 static int sctp_getsockopt_peer_auth_chunks(struct sock *sk, int len,
6959 char __user *optval, int __user *optlen)
6961 struct sctp_authchunks __user *p = (void __user *)optval;
6962 struct sctp_authchunks val;
6963 struct sctp_association *asoc;
6964 struct sctp_chunks_param *ch;
6968 if (len < sizeof(struct sctp_authchunks))
6971 if (copy_from_user(&val, optval, sizeof(val)))
6974 to = p->gauth_chunks;
6975 asoc = sctp_id2assoc(sk, val.gauth_assoc_id);
6979 if (!asoc->peer.auth_capable)
6982 ch = asoc->peer.peer_chunks;
6986 /* See if the user provided enough room for all the data */
6987 num_chunks = ntohs(ch->param_hdr.length) - sizeof(struct sctp_paramhdr);
6988 if (len < num_chunks)
6991 if (copy_to_user(to, ch->chunks, num_chunks))
6994 len = sizeof(struct sctp_authchunks) + num_chunks;
6995 if (put_user(len, optlen))
6997 if (put_user(num_chunks, &p->gauth_number_of_chunks))
7002 static int sctp_getsockopt_local_auth_chunks(struct sock *sk, int len,
7003 char __user *optval, int __user *optlen)
7005 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
7006 struct sctp_authchunks __user *p = (void __user *)optval;
7007 struct sctp_authchunks val;
7008 struct sctp_association *asoc;
7009 struct sctp_chunks_param *ch;
7013 if (len < sizeof(struct sctp_authchunks))
7016 if (copy_from_user(&val, optval, sizeof(val)))
7019 to = p->gauth_chunks;
7020 asoc = sctp_id2assoc(sk, val.gauth_assoc_id);
7021 if (!asoc && val.gauth_assoc_id != SCTP_FUTURE_ASSOC &&
7022 sctp_style(sk, UDP))
7026 if (!asoc->peer.auth_capable)
7028 ch = (struct sctp_chunks_param *)asoc->c.auth_chunks;
7030 if (!ep->auth_enable)
7032 ch = ep->auth_chunk_list;
7037 num_chunks = ntohs(ch->param_hdr.length) - sizeof(struct sctp_paramhdr);
7038 if (len < sizeof(struct sctp_authchunks) + num_chunks)
7041 if (copy_to_user(to, ch->chunks, num_chunks))
7044 len = sizeof(struct sctp_authchunks) + num_chunks;
7045 if (put_user(len, optlen))
7047 if (put_user(num_chunks, &p->gauth_number_of_chunks))
7054 * 8.2.5. Get the Current Number of Associations (SCTP_GET_ASSOC_NUMBER)
7055 * This option gets the current number of associations that are attached
7056 * to a one-to-many style socket. The option value is an uint32_t.
7058 static int sctp_getsockopt_assoc_number(struct sock *sk, int len,
7059 char __user *optval, int __user *optlen)
7061 struct sctp_sock *sp = sctp_sk(sk);
7062 struct sctp_association *asoc;
7065 if (sctp_style(sk, TCP))
7068 if (len < sizeof(u32))
7073 list_for_each_entry(asoc, &(sp->ep->asocs), asocs) {
7077 if (put_user(len, optlen))
7079 if (copy_to_user(optval, &val, len))
7086 * 8.1.23 SCTP_AUTO_ASCONF
7087 * See the corresponding setsockopt entry as description
7089 static int sctp_getsockopt_auto_asconf(struct sock *sk, int len,
7090 char __user *optval, int __user *optlen)
7094 if (len < sizeof(int))
7098 if (sctp_sk(sk)->do_auto_asconf && sctp_is_ep_boundall(sk))
7100 if (put_user(len, optlen))
7102 if (copy_to_user(optval, &val, len))
7108 * 8.2.6. Get the Current Identifiers of Associations
7109 * (SCTP_GET_ASSOC_ID_LIST)
7111 * This option gets the current list of SCTP association identifiers of
7112 * the SCTP associations handled by a one-to-many style socket.
7114 static int sctp_getsockopt_assoc_ids(struct sock *sk, int len,
7115 char __user *optval, int __user *optlen)
7117 struct sctp_sock *sp = sctp_sk(sk);
7118 struct sctp_association *asoc;
7119 struct sctp_assoc_ids *ids;
7122 if (sctp_style(sk, TCP))
7125 if (len < sizeof(struct sctp_assoc_ids))
7128 list_for_each_entry(asoc, &(sp->ep->asocs), asocs) {
7132 if (len < sizeof(struct sctp_assoc_ids) + sizeof(sctp_assoc_t) * num)
7135 len = sizeof(struct sctp_assoc_ids) + sizeof(sctp_assoc_t) * num;
7137 ids = kmalloc(len, GFP_USER | __GFP_NOWARN);
7141 ids->gaids_number_of_ids = num;
7143 list_for_each_entry(asoc, &(sp->ep->asocs), asocs) {
7144 ids->gaids_assoc_id[num++] = asoc->assoc_id;
7147 if (put_user(len, optlen) || copy_to_user(optval, ids, len)) {
7157 * SCTP_PEER_ADDR_THLDS
7159 * This option allows us to fetch the partially failed threshold for one or all
7160 * transports in an association. See Section 6.1 of:
7161 * http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txt
7163 static int sctp_getsockopt_paddr_thresholds(struct sock *sk,
7164 char __user *optval, int len,
7165 int __user *optlen, bool v2)
7167 struct sctp_paddrthlds_v2 val;
7168 struct sctp_transport *trans;
7169 struct sctp_association *asoc;
7172 min = v2 ? sizeof(val) : sizeof(struct sctp_paddrthlds);
7176 if (copy_from_user(&val, optval, len))
7179 if (!sctp_is_any(sk, (const union sctp_addr *)&val.spt_address)) {
7180 trans = sctp_addr_id2transport(sk, &val.spt_address,
7185 val.spt_pathmaxrxt = trans->pathmaxrxt;
7186 val.spt_pathpfthld = trans->pf_retrans;
7187 val.spt_pathcpthld = trans->ps_retrans;
7192 asoc = sctp_id2assoc(sk, val.spt_assoc_id);
7193 if (!asoc && val.spt_assoc_id != SCTP_FUTURE_ASSOC &&
7194 sctp_style(sk, UDP))
7198 val.spt_pathpfthld = asoc->pf_retrans;
7199 val.spt_pathmaxrxt = asoc->pathmaxrxt;
7200 val.spt_pathcpthld = asoc->ps_retrans;
7202 struct sctp_sock *sp = sctp_sk(sk);
7204 val.spt_pathpfthld = sp->pf_retrans;
7205 val.spt_pathmaxrxt = sp->pathmaxrxt;
7206 val.spt_pathcpthld = sp->ps_retrans;
7210 if (put_user(len, optlen) || copy_to_user(optval, &val, len))
7217 * SCTP_GET_ASSOC_STATS
7219 * This option retrieves local per endpoint statistics. It is modeled
7220 * after OpenSolaris' implementation
7222 static int sctp_getsockopt_assoc_stats(struct sock *sk, int len,
7223 char __user *optval,
7226 struct sctp_assoc_stats sas;
7227 struct sctp_association *asoc = NULL;
7229 /* User must provide at least the assoc id */
7230 if (len < sizeof(sctp_assoc_t))
7233 /* Allow the struct to grow and fill in as much as possible */
7234 len = min_t(size_t, len, sizeof(sas));
7236 if (copy_from_user(&sas, optval, len))
7239 asoc = sctp_id2assoc(sk, sas.sas_assoc_id);
7243 sas.sas_rtxchunks = asoc->stats.rtxchunks;
7244 sas.sas_gapcnt = asoc->stats.gapcnt;
7245 sas.sas_outofseqtsns = asoc->stats.outofseqtsns;
7246 sas.sas_osacks = asoc->stats.osacks;
7247 sas.sas_isacks = asoc->stats.isacks;
7248 sas.sas_octrlchunks = asoc->stats.octrlchunks;
7249 sas.sas_ictrlchunks = asoc->stats.ictrlchunks;
7250 sas.sas_oodchunks = asoc->stats.oodchunks;
7251 sas.sas_iodchunks = asoc->stats.iodchunks;
7252 sas.sas_ouodchunks = asoc->stats.ouodchunks;
7253 sas.sas_iuodchunks = asoc->stats.iuodchunks;
7254 sas.sas_idupchunks = asoc->stats.idupchunks;
7255 sas.sas_opackets = asoc->stats.opackets;
7256 sas.sas_ipackets = asoc->stats.ipackets;
7258 /* New high max rto observed, will return 0 if not a single
7259 * RTO update took place. obs_rto_ipaddr will be bogus
7262 sas.sas_maxrto = asoc->stats.max_obs_rto;
7263 memcpy(&sas.sas_obs_rto_ipaddr, &asoc->stats.obs_rto_ipaddr,
7264 sizeof(struct sockaddr_storage));
7266 /* Mark beginning of a new observation period */
7267 asoc->stats.max_obs_rto = asoc->rto_min;
7269 if (put_user(len, optlen))
7272 pr_debug("%s: len:%d, assoc_id:%d\n", __func__, len, sas.sas_assoc_id);
7274 if (copy_to_user(optval, &sas, len))
7280 static int sctp_getsockopt_recvrcvinfo(struct sock *sk, int len,
7281 char __user *optval,
7286 if (len < sizeof(int))
7290 if (sctp_sk(sk)->recvrcvinfo)
7292 if (put_user(len, optlen))
7294 if (copy_to_user(optval, &val, len))
7300 static int sctp_getsockopt_recvnxtinfo(struct sock *sk, int len,
7301 char __user *optval,
7306 if (len < sizeof(int))
7310 if (sctp_sk(sk)->recvnxtinfo)
7312 if (put_user(len, optlen))
7314 if (copy_to_user(optval, &val, len))
7320 static int sctp_getsockopt_pr_supported(struct sock *sk, int len,
7321 char __user *optval,
7324 struct sctp_assoc_value params;
7325 struct sctp_association *asoc;
7326 int retval = -EFAULT;
7328 if (len < sizeof(params)) {
7333 len = sizeof(params);
7334 if (copy_from_user(¶ms, optval, len))
7337 asoc = sctp_id2assoc(sk, params.assoc_id);
7338 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7339 sctp_style(sk, UDP)) {
7344 params.assoc_value = asoc ? asoc->peer.prsctp_capable
7345 : sctp_sk(sk)->ep->prsctp_enable;
7347 if (put_user(len, optlen))
7350 if (copy_to_user(optval, ¶ms, len))
7359 static int sctp_getsockopt_default_prinfo(struct sock *sk, int len,
7360 char __user *optval,
7363 struct sctp_default_prinfo info;
7364 struct sctp_association *asoc;
7365 int retval = -EFAULT;
7367 if (len < sizeof(info)) {
7373 if (copy_from_user(&info, optval, len))
7376 asoc = sctp_id2assoc(sk, info.pr_assoc_id);
7377 if (!asoc && info.pr_assoc_id != SCTP_FUTURE_ASSOC &&
7378 sctp_style(sk, UDP)) {
7384 info.pr_policy = SCTP_PR_POLICY(asoc->default_flags);
7385 info.pr_value = asoc->default_timetolive;
7387 struct sctp_sock *sp = sctp_sk(sk);
7389 info.pr_policy = SCTP_PR_POLICY(sp->default_flags);
7390 info.pr_value = sp->default_timetolive;
7393 if (put_user(len, optlen))
7396 if (copy_to_user(optval, &info, len))
7405 static int sctp_getsockopt_pr_assocstatus(struct sock *sk, int len,
7406 char __user *optval,
7409 struct sctp_prstatus params;
7410 struct sctp_association *asoc;
7412 int retval = -EINVAL;
7414 if (len < sizeof(params))
7417 len = sizeof(params);
7418 if (copy_from_user(¶ms, optval, len)) {
7423 policy = params.sprstat_policy;
7424 if (!policy || (policy & ~(SCTP_PR_SCTP_MASK | SCTP_PR_SCTP_ALL)) ||
7425 ((policy & SCTP_PR_SCTP_ALL) && (policy & SCTP_PR_SCTP_MASK)))
7428 asoc = sctp_id2assoc(sk, params.sprstat_assoc_id);
7432 if (policy == SCTP_PR_SCTP_ALL) {
7433 params.sprstat_abandoned_unsent = 0;
7434 params.sprstat_abandoned_sent = 0;
7435 for (policy = 0; policy <= SCTP_PR_INDEX(MAX); policy++) {
7436 params.sprstat_abandoned_unsent +=
7437 asoc->abandoned_unsent[policy];
7438 params.sprstat_abandoned_sent +=
7439 asoc->abandoned_sent[policy];
7442 params.sprstat_abandoned_unsent =
7443 asoc->abandoned_unsent[__SCTP_PR_INDEX(policy)];
7444 params.sprstat_abandoned_sent =
7445 asoc->abandoned_sent[__SCTP_PR_INDEX(policy)];
7448 if (put_user(len, optlen)) {
7453 if (copy_to_user(optval, ¶ms, len)) {
7464 static int sctp_getsockopt_pr_streamstatus(struct sock *sk, int len,
7465 char __user *optval,
7468 struct sctp_stream_out_ext *streamoute;
7469 struct sctp_association *asoc;
7470 struct sctp_prstatus params;
7471 int retval = -EINVAL;
7474 if (len < sizeof(params))
7477 len = sizeof(params);
7478 if (copy_from_user(¶ms, optval, len)) {
7483 policy = params.sprstat_policy;
7484 if (!policy || (policy & ~(SCTP_PR_SCTP_MASK | SCTP_PR_SCTP_ALL)) ||
7485 ((policy & SCTP_PR_SCTP_ALL) && (policy & SCTP_PR_SCTP_MASK)))
7488 asoc = sctp_id2assoc(sk, params.sprstat_assoc_id);
7489 if (!asoc || params.sprstat_sid >= asoc->stream.outcnt)
7492 streamoute = SCTP_SO(&asoc->stream, params.sprstat_sid)->ext;
7494 /* Not allocated yet, means all stats are 0 */
7495 params.sprstat_abandoned_unsent = 0;
7496 params.sprstat_abandoned_sent = 0;
7501 if (policy == SCTP_PR_SCTP_ALL) {
7502 params.sprstat_abandoned_unsent = 0;
7503 params.sprstat_abandoned_sent = 0;
7504 for (policy = 0; policy <= SCTP_PR_INDEX(MAX); policy++) {
7505 params.sprstat_abandoned_unsent +=
7506 streamoute->abandoned_unsent[policy];
7507 params.sprstat_abandoned_sent +=
7508 streamoute->abandoned_sent[policy];
7511 params.sprstat_abandoned_unsent =
7512 streamoute->abandoned_unsent[__SCTP_PR_INDEX(policy)];
7513 params.sprstat_abandoned_sent =
7514 streamoute->abandoned_sent[__SCTP_PR_INDEX(policy)];
7517 if (put_user(len, optlen) || copy_to_user(optval, ¶ms, len)) {
7528 static int sctp_getsockopt_reconfig_supported(struct sock *sk, int len,
7529 char __user *optval,
7532 struct sctp_assoc_value params;
7533 struct sctp_association *asoc;
7534 int retval = -EFAULT;
7536 if (len < sizeof(params)) {
7541 len = sizeof(params);
7542 if (copy_from_user(¶ms, optval, len))
7545 asoc = sctp_id2assoc(sk, params.assoc_id);
7546 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7547 sctp_style(sk, UDP)) {
7552 params.assoc_value = asoc ? asoc->peer.reconf_capable
7553 : sctp_sk(sk)->ep->reconf_enable;
7555 if (put_user(len, optlen))
7558 if (copy_to_user(optval, ¶ms, len))
7567 static int sctp_getsockopt_enable_strreset(struct sock *sk, int len,
7568 char __user *optval,
7571 struct sctp_assoc_value params;
7572 struct sctp_association *asoc;
7573 int retval = -EFAULT;
7575 if (len < sizeof(params)) {
7580 len = sizeof(params);
7581 if (copy_from_user(¶ms, optval, len))
7584 asoc = sctp_id2assoc(sk, params.assoc_id);
7585 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7586 sctp_style(sk, UDP)) {
7591 params.assoc_value = asoc ? asoc->strreset_enable
7592 : sctp_sk(sk)->ep->strreset_enable;
7594 if (put_user(len, optlen))
7597 if (copy_to_user(optval, ¶ms, len))
7606 static int sctp_getsockopt_scheduler(struct sock *sk, int len,
7607 char __user *optval,
7610 struct sctp_assoc_value params;
7611 struct sctp_association *asoc;
7612 int retval = -EFAULT;
7614 if (len < sizeof(params)) {
7619 len = sizeof(params);
7620 if (copy_from_user(¶ms, optval, len))
7623 asoc = sctp_id2assoc(sk, params.assoc_id);
7624 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7625 sctp_style(sk, UDP)) {
7630 params.assoc_value = asoc ? sctp_sched_get_sched(asoc)
7631 : sctp_sk(sk)->default_ss;
7633 if (put_user(len, optlen))
7636 if (copy_to_user(optval, ¶ms, len))
7645 static int sctp_getsockopt_scheduler_value(struct sock *sk, int len,
7646 char __user *optval,
7649 struct sctp_stream_value params;
7650 struct sctp_association *asoc;
7651 int retval = -EFAULT;
7653 if (len < sizeof(params)) {
7658 len = sizeof(params);
7659 if (copy_from_user(¶ms, optval, len))
7662 asoc = sctp_id2assoc(sk, params.assoc_id);
7668 retval = sctp_sched_get_value(asoc, params.stream_id,
7669 ¶ms.stream_value);
7673 if (put_user(len, optlen)) {
7678 if (copy_to_user(optval, ¶ms, len)) {
7687 static int sctp_getsockopt_interleaving_supported(struct sock *sk, int len,
7688 char __user *optval,
7691 struct sctp_assoc_value params;
7692 struct sctp_association *asoc;
7693 int retval = -EFAULT;
7695 if (len < sizeof(params)) {
7700 len = sizeof(params);
7701 if (copy_from_user(¶ms, optval, len))
7704 asoc = sctp_id2assoc(sk, params.assoc_id);
7705 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7706 sctp_style(sk, UDP)) {
7711 params.assoc_value = asoc ? asoc->peer.intl_capable
7712 : sctp_sk(sk)->ep->intl_enable;
7714 if (put_user(len, optlen))
7717 if (copy_to_user(optval, ¶ms, len))
7726 static int sctp_getsockopt_reuse_port(struct sock *sk, int len,
7727 char __user *optval,
7732 if (len < sizeof(int))
7736 val = sctp_sk(sk)->reuse;
7737 if (put_user(len, optlen))
7740 if (copy_to_user(optval, &val, len))
7746 static int sctp_getsockopt_event(struct sock *sk, int len, char __user *optval,
7749 struct sctp_association *asoc;
7750 struct sctp_event param;
7753 if (len < sizeof(param))
7756 len = sizeof(param);
7757 if (copy_from_user(¶m, optval, len))
7760 if (param.se_type < SCTP_SN_TYPE_BASE ||
7761 param.se_type > SCTP_SN_TYPE_MAX)
7764 asoc = sctp_id2assoc(sk, param.se_assoc_id);
7765 if (!asoc && param.se_assoc_id != SCTP_FUTURE_ASSOC &&
7766 sctp_style(sk, UDP))
7769 subscribe = asoc ? asoc->subscribe : sctp_sk(sk)->subscribe;
7770 param.se_on = sctp_ulpevent_type_enabled(subscribe, param.se_type);
7772 if (put_user(len, optlen))
7775 if (copy_to_user(optval, ¶m, len))
7781 static int sctp_getsockopt_asconf_supported(struct sock *sk, int len,
7782 char __user *optval,
7785 struct sctp_assoc_value params;
7786 struct sctp_association *asoc;
7787 int retval = -EFAULT;
7789 if (len < sizeof(params)) {
7794 len = sizeof(params);
7795 if (copy_from_user(¶ms, optval, len))
7798 asoc = sctp_id2assoc(sk, params.assoc_id);
7799 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7800 sctp_style(sk, UDP)) {
7805 params.assoc_value = asoc ? asoc->peer.asconf_capable
7806 : sctp_sk(sk)->ep->asconf_enable;
7808 if (put_user(len, optlen))
7811 if (copy_to_user(optval, ¶ms, len))
7820 static int sctp_getsockopt_auth_supported(struct sock *sk, int len,
7821 char __user *optval,
7824 struct sctp_assoc_value params;
7825 struct sctp_association *asoc;
7826 int retval = -EFAULT;
7828 if (len < sizeof(params)) {
7833 len = sizeof(params);
7834 if (copy_from_user(¶ms, optval, len))
7837 asoc = sctp_id2assoc(sk, params.assoc_id);
7838 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7839 sctp_style(sk, UDP)) {
7844 params.assoc_value = asoc ? asoc->peer.auth_capable
7845 : sctp_sk(sk)->ep->auth_enable;
7847 if (put_user(len, optlen))
7850 if (copy_to_user(optval, ¶ms, len))
7859 static int sctp_getsockopt_ecn_supported(struct sock *sk, int len,
7860 char __user *optval,
7863 struct sctp_assoc_value params;
7864 struct sctp_association *asoc;
7865 int retval = -EFAULT;
7867 if (len < sizeof(params)) {
7872 len = sizeof(params);
7873 if (copy_from_user(¶ms, optval, len))
7876 asoc = sctp_id2assoc(sk, params.assoc_id);
7877 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7878 sctp_style(sk, UDP)) {
7883 params.assoc_value = asoc ? asoc->peer.ecn_capable
7884 : sctp_sk(sk)->ep->ecn_enable;
7886 if (put_user(len, optlen))
7889 if (copy_to_user(optval, ¶ms, len))
7898 static int sctp_getsockopt_pf_expose(struct sock *sk, int len,
7899 char __user *optval,
7902 struct sctp_assoc_value params;
7903 struct sctp_association *asoc;
7904 int retval = -EFAULT;
7906 if (len < sizeof(params)) {
7911 len = sizeof(params);
7912 if (copy_from_user(¶ms, optval, len))
7915 asoc = sctp_id2assoc(sk, params.assoc_id);
7916 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7917 sctp_style(sk, UDP)) {
7922 params.assoc_value = asoc ? asoc->pf_expose
7923 : sctp_sk(sk)->pf_expose;
7925 if (put_user(len, optlen))
7928 if (copy_to_user(optval, ¶ms, len))
7937 static int sctp_getsockopt_encap_port(struct sock *sk, int len,
7938 char __user *optval, int __user *optlen)
7940 struct sctp_association *asoc;
7941 struct sctp_udpencaps encap;
7942 struct sctp_transport *t;
7945 if (len < sizeof(encap))
7948 len = sizeof(encap);
7949 if (copy_from_user(&encap, optval, len))
7952 /* If an address other than INADDR_ANY is specified, and
7953 * no transport is found, then the request is invalid.
7955 if (!sctp_is_any(sk, (union sctp_addr *)&encap.sue_address)) {
7956 t = sctp_addr_id2transport(sk, &encap.sue_address,
7957 encap.sue_assoc_id);
7959 pr_debug("%s: failed no transport\n", __func__);
7963 encap_port = t->encap_port;
7967 /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
7968 * socket is a one to many style socket, and an association
7969 * was not found, then the id was invalid.
7971 asoc = sctp_id2assoc(sk, encap.sue_assoc_id);
7972 if (!asoc && encap.sue_assoc_id != SCTP_FUTURE_ASSOC &&
7973 sctp_style(sk, UDP)) {
7974 pr_debug("%s: failed no association\n", __func__);
7979 encap_port = asoc->encap_port;
7983 encap_port = sctp_sk(sk)->encap_port;
7986 encap.sue_port = (__force uint16_t)encap_port;
7987 if (copy_to_user(optval, &encap, len))
7990 if (put_user(len, optlen))
7996 static int sctp_getsockopt_probe_interval(struct sock *sk, int len,
7997 char __user *optval,
8000 struct sctp_probeinterval params;
8001 struct sctp_association *asoc;
8002 struct sctp_transport *t;
8003 __u32 probe_interval;
8005 if (len < sizeof(params))
8008 len = sizeof(params);
8009 if (copy_from_user(¶ms, optval, len))
8012 /* If an address other than INADDR_ANY is specified, and
8013 * no transport is found, then the request is invalid.
8015 if (!sctp_is_any(sk, (union sctp_addr *)¶ms.spi_address)) {
8016 t = sctp_addr_id2transport(sk, ¶ms.spi_address,
8017 params.spi_assoc_id);
8019 pr_debug("%s: failed no transport\n", __func__);
8023 probe_interval = jiffies_to_msecs(t->probe_interval);
8027 /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
8028 * socket is a one to many style socket, and an association
8029 * was not found, then the id was invalid.
8031 asoc = sctp_id2assoc(sk, params.spi_assoc_id);
8032 if (!asoc && params.spi_assoc_id != SCTP_FUTURE_ASSOC &&
8033 sctp_style(sk, UDP)) {
8034 pr_debug("%s: failed no association\n", __func__);
8039 probe_interval = jiffies_to_msecs(asoc->probe_interval);
8043 probe_interval = sctp_sk(sk)->probe_interval;
8046 params.spi_interval = probe_interval;
8047 if (copy_to_user(optval, ¶ms, len))
8050 if (put_user(len, optlen))
8056 static int sctp_getsockopt(struct sock *sk, int level, int optname,
8057 char __user *optval, int __user *optlen)
8062 pr_debug("%s: sk:%p, optname:%d\n", __func__, sk, optname);
8064 /* I can hardly begin to describe how wrong this is. This is
8065 * so broken as to be worse than useless. The API draft
8066 * REALLY is NOT helpful here... I am not convinced that the
8067 * semantics of getsockopt() with a level OTHER THAN SOL_SCTP
8068 * are at all well-founded.
8070 if (level != SOL_SCTP) {
8071 struct sctp_af *af = sctp_sk(sk)->pf->af;
8073 retval = af->getsockopt(sk, level, optname, optval, optlen);
8077 if (get_user(len, optlen))
8087 retval = sctp_getsockopt_sctp_status(sk, len, optval, optlen);
8089 case SCTP_DISABLE_FRAGMENTS:
8090 retval = sctp_getsockopt_disable_fragments(sk, len, optval,
8094 retval = sctp_getsockopt_events(sk, len, optval, optlen);
8096 case SCTP_AUTOCLOSE:
8097 retval = sctp_getsockopt_autoclose(sk, len, optval, optlen);
8099 case SCTP_SOCKOPT_PEELOFF:
8100 retval = sctp_getsockopt_peeloff(sk, len, optval, optlen);
8102 case SCTP_SOCKOPT_PEELOFF_FLAGS:
8103 retval = sctp_getsockopt_peeloff_flags(sk, len, optval, optlen);
8105 case SCTP_PEER_ADDR_PARAMS:
8106 retval = sctp_getsockopt_peer_addr_params(sk, len, optval,
8109 case SCTP_DELAYED_SACK:
8110 retval = sctp_getsockopt_delayed_ack(sk, len, optval,
8114 retval = sctp_getsockopt_initmsg(sk, len, optval, optlen);
8116 case SCTP_GET_PEER_ADDRS:
8117 retval = sctp_getsockopt_peer_addrs(sk, len, optval,
8120 case SCTP_GET_LOCAL_ADDRS:
8121 retval = sctp_getsockopt_local_addrs(sk, len, optval,
8124 case SCTP_SOCKOPT_CONNECTX3:
8125 retval = sctp_getsockopt_connectx3(sk, len, optval, optlen);
8127 case SCTP_DEFAULT_SEND_PARAM:
8128 retval = sctp_getsockopt_default_send_param(sk, len,
8131 case SCTP_DEFAULT_SNDINFO:
8132 retval = sctp_getsockopt_default_sndinfo(sk, len,
8135 case SCTP_PRIMARY_ADDR:
8136 retval = sctp_getsockopt_primary_addr(sk, len, optval, optlen);
8139 retval = sctp_getsockopt_nodelay(sk, len, optval, optlen);
8142 retval = sctp_getsockopt_rtoinfo(sk, len, optval, optlen);
8144 case SCTP_ASSOCINFO:
8145 retval = sctp_getsockopt_associnfo(sk, len, optval, optlen);
8147 case SCTP_I_WANT_MAPPED_V4_ADDR:
8148 retval = sctp_getsockopt_mappedv4(sk, len, optval, optlen);
8151 retval = sctp_getsockopt_maxseg(sk, len, optval, optlen);
8153 case SCTP_GET_PEER_ADDR_INFO:
8154 retval = sctp_getsockopt_peer_addr_info(sk, len, optval,
8157 case SCTP_ADAPTATION_LAYER:
8158 retval = sctp_getsockopt_adaptation_layer(sk, len, optval,
8162 retval = sctp_getsockopt_context(sk, len, optval, optlen);
8164 case SCTP_FRAGMENT_INTERLEAVE:
8165 retval = sctp_getsockopt_fragment_interleave(sk, len, optval,
8168 case SCTP_PARTIAL_DELIVERY_POINT:
8169 retval = sctp_getsockopt_partial_delivery_point(sk, len, optval,
8172 case SCTP_MAX_BURST:
8173 retval = sctp_getsockopt_maxburst(sk, len, optval, optlen);
8176 case SCTP_AUTH_CHUNK:
8177 case SCTP_AUTH_DELETE_KEY:
8178 case SCTP_AUTH_DEACTIVATE_KEY:
8179 retval = -EOPNOTSUPP;
8181 case SCTP_HMAC_IDENT:
8182 retval = sctp_getsockopt_hmac_ident(sk, len, optval, optlen);
8184 case SCTP_AUTH_ACTIVE_KEY:
8185 retval = sctp_getsockopt_active_key(sk, len, optval, optlen);
8187 case SCTP_PEER_AUTH_CHUNKS:
8188 retval = sctp_getsockopt_peer_auth_chunks(sk, len, optval,
8191 case SCTP_LOCAL_AUTH_CHUNKS:
8192 retval = sctp_getsockopt_local_auth_chunks(sk, len, optval,
8195 case SCTP_GET_ASSOC_NUMBER:
8196 retval = sctp_getsockopt_assoc_number(sk, len, optval, optlen);
8198 case SCTP_GET_ASSOC_ID_LIST:
8199 retval = sctp_getsockopt_assoc_ids(sk, len, optval, optlen);
8201 case SCTP_AUTO_ASCONF:
8202 retval = sctp_getsockopt_auto_asconf(sk, len, optval, optlen);
8204 case SCTP_PEER_ADDR_THLDS:
8205 retval = sctp_getsockopt_paddr_thresholds(sk, optval, len,
8208 case SCTP_PEER_ADDR_THLDS_V2:
8209 retval = sctp_getsockopt_paddr_thresholds(sk, optval, len,
8212 case SCTP_GET_ASSOC_STATS:
8213 retval = sctp_getsockopt_assoc_stats(sk, len, optval, optlen);
8215 case SCTP_RECVRCVINFO:
8216 retval = sctp_getsockopt_recvrcvinfo(sk, len, optval, optlen);
8218 case SCTP_RECVNXTINFO:
8219 retval = sctp_getsockopt_recvnxtinfo(sk, len, optval, optlen);
8221 case SCTP_PR_SUPPORTED:
8222 retval = sctp_getsockopt_pr_supported(sk, len, optval, optlen);
8224 case SCTP_DEFAULT_PRINFO:
8225 retval = sctp_getsockopt_default_prinfo(sk, len, optval,
8228 case SCTP_PR_ASSOC_STATUS:
8229 retval = sctp_getsockopt_pr_assocstatus(sk, len, optval,
8232 case SCTP_PR_STREAM_STATUS:
8233 retval = sctp_getsockopt_pr_streamstatus(sk, len, optval,
8236 case SCTP_RECONFIG_SUPPORTED:
8237 retval = sctp_getsockopt_reconfig_supported(sk, len, optval,
8240 case SCTP_ENABLE_STREAM_RESET:
8241 retval = sctp_getsockopt_enable_strreset(sk, len, optval,
8244 case SCTP_STREAM_SCHEDULER:
8245 retval = sctp_getsockopt_scheduler(sk, len, optval,
8248 case SCTP_STREAM_SCHEDULER_VALUE:
8249 retval = sctp_getsockopt_scheduler_value(sk, len, optval,
8252 case SCTP_INTERLEAVING_SUPPORTED:
8253 retval = sctp_getsockopt_interleaving_supported(sk, len, optval,
8256 case SCTP_REUSE_PORT:
8257 retval = sctp_getsockopt_reuse_port(sk, len, optval, optlen);
8260 retval = sctp_getsockopt_event(sk, len, optval, optlen);
8262 case SCTP_ASCONF_SUPPORTED:
8263 retval = sctp_getsockopt_asconf_supported(sk, len, optval,
8266 case SCTP_AUTH_SUPPORTED:
8267 retval = sctp_getsockopt_auth_supported(sk, len, optval,
8270 case SCTP_ECN_SUPPORTED:
8271 retval = sctp_getsockopt_ecn_supported(sk, len, optval, optlen);
8273 case SCTP_EXPOSE_POTENTIALLY_FAILED_STATE:
8274 retval = sctp_getsockopt_pf_expose(sk, len, optval, optlen);
8276 case SCTP_REMOTE_UDP_ENCAPS_PORT:
8277 retval = sctp_getsockopt_encap_port(sk, len, optval, optlen);
8279 case SCTP_PLPMTUD_PROBE_INTERVAL:
8280 retval = sctp_getsockopt_probe_interval(sk, len, optval, optlen);
8283 retval = -ENOPROTOOPT;
8291 static bool sctp_bpf_bypass_getsockopt(int level, int optname)
8293 if (level == SOL_SCTP) {
8295 case SCTP_SOCKOPT_PEELOFF:
8296 case SCTP_SOCKOPT_PEELOFF_FLAGS:
8297 case SCTP_SOCKOPT_CONNECTX3:
8307 static int sctp_hash(struct sock *sk)
8313 static void sctp_unhash(struct sock *sk)
8318 /* Check if port is acceptable. Possibly find first available port.
8320 * The port hash table (contained in the 'global' SCTP protocol storage
8321 * returned by struct sctp_protocol *sctp_get_protocol()). The hash
8322 * table is an array of 4096 lists (sctp_bind_hashbucket). Each
8323 * list (the list number is the port number hashed out, so as you
8324 * would expect from a hash function, all the ports in a given list have
8325 * such a number that hashes out to the same list number; you were
8326 * expecting that, right?); so each list has a set of ports, with a
8327 * link to the socket (struct sock) that uses it, the port number and
8328 * a fastreuse flag (FIXME: NPI ipg).
8330 static struct sctp_bind_bucket *sctp_bucket_create(
8331 struct sctp_bind_hashbucket *head, struct net *, unsigned short snum);
8333 static int sctp_get_port_local(struct sock *sk, union sctp_addr *addr)
8335 struct sctp_sock *sp = sctp_sk(sk);
8336 bool reuse = (sk->sk_reuse || sp->reuse);
8337 struct sctp_bind_hashbucket *head; /* hash list */
8338 struct net *net = sock_net(sk);
8339 kuid_t uid = sock_i_uid(sk);
8340 struct sctp_bind_bucket *pp;
8341 unsigned short snum;
8344 snum = ntohs(addr->v4.sin_port);
8346 pr_debug("%s: begins, snum:%d\n", __func__, snum);
8349 /* Search for an available port. */
8350 int low, high, remaining, index;
8353 inet_get_local_port_range(net, &low, &high);
8354 remaining = (high - low) + 1;
8355 rover = prandom_u32() % remaining + low;
8359 if ((rover < low) || (rover > high))
8361 if (inet_is_local_reserved_port(net, rover))
8363 index = sctp_phashfn(net, rover);
8364 head = &sctp_port_hashtable[index];
8365 spin_lock_bh(&head->lock);
8366 sctp_for_each_hentry(pp, &head->chain)
8367 if ((pp->port == rover) &&
8368 net_eq(net, pp->net))
8372 spin_unlock_bh(&head->lock);
8374 } while (--remaining > 0);
8376 /* Exhausted local port range during search? */
8381 /* OK, here is the one we will use. HEAD (the port
8382 * hash table list entry) is non-NULL and we hold it's
8387 /* We are given an specific port number; we verify
8388 * that it is not being used. If it is used, we will
8389 * exahust the search in the hash list corresponding
8390 * to the port number (snum) - we detect that with the
8391 * port iterator, pp being NULL.
8393 head = &sctp_port_hashtable[sctp_phashfn(net, snum)];
8394 spin_lock_bh(&head->lock);
8395 sctp_for_each_hentry(pp, &head->chain) {
8396 if ((pp->port == snum) && net_eq(pp->net, net))
8403 if (!hlist_empty(&pp->owner)) {
8404 /* We had a port hash table hit - there is an
8405 * available port (pp != NULL) and it is being
8406 * used by other socket (pp->owner not empty); that other
8407 * socket is going to be sk2.
8411 pr_debug("%s: found a possible match\n", __func__);
8413 if ((pp->fastreuse && reuse &&
8414 sk->sk_state != SCTP_SS_LISTENING) ||
8415 (pp->fastreuseport && sk->sk_reuseport &&
8416 uid_eq(pp->fastuid, uid)))
8419 /* Run through the list of sockets bound to the port
8420 * (pp->port) [via the pointers bind_next and
8421 * bind_pprev in the struct sock *sk2 (pp->sk)]. On each one,
8422 * we get the endpoint they describe and run through
8423 * the endpoint's list of IP (v4 or v6) addresses,
8424 * comparing each of the addresses with the address of
8425 * the socket sk. If we find a match, then that means
8426 * that this port/socket (sk) combination are already
8429 sk_for_each_bound(sk2, &pp->owner) {
8430 struct sctp_sock *sp2 = sctp_sk(sk2);
8431 struct sctp_endpoint *ep2 = sp2->ep;
8434 (reuse && (sk2->sk_reuse || sp2->reuse) &&
8435 sk2->sk_state != SCTP_SS_LISTENING) ||
8436 (sk->sk_reuseport && sk2->sk_reuseport &&
8437 uid_eq(uid, sock_i_uid(sk2))))
8440 if (sctp_bind_addr_conflict(&ep2->base.bind_addr,
8447 pr_debug("%s: found a match\n", __func__);
8450 /* If there was a hash table miss, create a new port. */
8452 if (!pp && !(pp = sctp_bucket_create(head, net, snum)))
8455 /* In either case (hit or miss), make sure fastreuse is 1 only
8456 * if sk->sk_reuse is too (that is, if the caller requested
8457 * SO_REUSEADDR on this socket -sk-).
8459 if (hlist_empty(&pp->owner)) {
8460 if (reuse && sk->sk_state != SCTP_SS_LISTENING)
8465 if (sk->sk_reuseport) {
8466 pp->fastreuseport = 1;
8469 pp->fastreuseport = 0;
8472 if (pp->fastreuse &&
8473 (!reuse || sk->sk_state == SCTP_SS_LISTENING))
8476 if (pp->fastreuseport &&
8477 (!sk->sk_reuseport || !uid_eq(pp->fastuid, uid)))
8478 pp->fastreuseport = 0;
8481 /* We are set, so fill up all the data in the hash table
8482 * entry, tie the socket list information with the rest of the
8483 * sockets FIXME: Blurry, NPI (ipg).
8486 if (!sp->bind_hash) {
8487 inet_sk(sk)->inet_num = snum;
8488 sk_add_bind_node(sk, &pp->owner);
8494 spin_unlock_bh(&head->lock);
8498 /* Assign a 'snum' port to the socket. If snum == 0, an ephemeral
8499 * port is requested.
8501 static int sctp_get_port(struct sock *sk, unsigned short snum)
8503 union sctp_addr addr;
8504 struct sctp_af *af = sctp_sk(sk)->pf->af;
8506 /* Set up a dummy address struct from the sk. */
8507 af->from_sk(&addr, sk);
8508 addr.v4.sin_port = htons(snum);
8510 /* Note: sk->sk_num gets filled in if ephemeral port request. */
8511 return sctp_get_port_local(sk, &addr);
8515 * Move a socket to LISTENING state.
8517 static int sctp_listen_start(struct sock *sk, int backlog)
8519 struct sctp_sock *sp = sctp_sk(sk);
8520 struct sctp_endpoint *ep = sp->ep;
8521 struct crypto_shash *tfm = NULL;
8524 /* Allocate HMAC for generating cookie. */
8525 if (!sp->hmac && sp->sctp_hmac_alg) {
8526 sprintf(alg, "hmac(%s)", sp->sctp_hmac_alg);
8527 tfm = crypto_alloc_shash(alg, 0, 0);
8529 net_info_ratelimited("failed to load transform for %s: %ld\n",
8530 sp->sctp_hmac_alg, PTR_ERR(tfm));
8533 sctp_sk(sk)->hmac = tfm;
8537 * If a bind() or sctp_bindx() is not called prior to a listen()
8538 * call that allows new associations to be accepted, the system
8539 * picks an ephemeral port and will choose an address set equivalent
8540 * to binding with a wildcard address.
8542 * This is not currently spelled out in the SCTP sockets
8543 * extensions draft, but follows the practice as seen in TCP
8547 inet_sk_set_state(sk, SCTP_SS_LISTENING);
8548 if (!ep->base.bind_addr.port) {
8549 if (sctp_autobind(sk))
8552 if (sctp_get_port(sk, inet_sk(sk)->inet_num)) {
8553 inet_sk_set_state(sk, SCTP_SS_CLOSED);
8558 WRITE_ONCE(sk->sk_max_ack_backlog, backlog);
8559 return sctp_hash_endpoint(ep);
8563 * 4.1.3 / 5.1.3 listen()
8565 * By default, new associations are not accepted for UDP style sockets.
8566 * An application uses listen() to mark a socket as being able to
8567 * accept new associations.
8569 * On TCP style sockets, applications use listen() to ready the SCTP
8570 * endpoint for accepting inbound associations.
8572 * On both types of endpoints a backlog of '0' disables listening.
8574 * Move a socket to LISTENING state.
8576 int sctp_inet_listen(struct socket *sock, int backlog)
8578 struct sock *sk = sock->sk;
8579 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
8582 if (unlikely(backlog < 0))
8587 /* Peeled-off sockets are not allowed to listen(). */
8588 if (sctp_style(sk, UDP_HIGH_BANDWIDTH))
8591 if (sock->state != SS_UNCONNECTED)
8594 if (!sctp_sstate(sk, LISTENING) && !sctp_sstate(sk, CLOSED))
8597 /* If backlog is zero, disable listening. */
8599 if (sctp_sstate(sk, CLOSED))
8603 sctp_unhash_endpoint(ep);
8604 sk->sk_state = SCTP_SS_CLOSED;
8605 if (sk->sk_reuse || sctp_sk(sk)->reuse)
8606 sctp_sk(sk)->bind_hash->fastreuse = 1;
8610 /* If we are already listening, just update the backlog */
8611 if (sctp_sstate(sk, LISTENING))
8612 WRITE_ONCE(sk->sk_max_ack_backlog, backlog);
8614 err = sctp_listen_start(sk, backlog);
8626 * This function is done by modeling the current datagram_poll() and the
8627 * tcp_poll(). Note that, based on these implementations, we don't
8628 * lock the socket in this function, even though it seems that,
8629 * ideally, locking or some other mechanisms can be used to ensure
8630 * the integrity of the counters (sndbuf and wmem_alloc) used
8631 * in this place. We assume that we don't need locks either until proven
8634 * Another thing to note is that we include the Async I/O support
8635 * here, again, by modeling the current TCP/UDP code. We don't have
8636 * a good way to test with it yet.
8638 __poll_t sctp_poll(struct file *file, struct socket *sock, poll_table *wait)
8640 struct sock *sk = sock->sk;
8641 struct sctp_sock *sp = sctp_sk(sk);
8644 poll_wait(file, sk_sleep(sk), wait);
8646 sock_rps_record_flow(sk);
8648 /* A TCP-style listening socket becomes readable when the accept queue
8651 if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))
8652 return (!list_empty(&sp->ep->asocs)) ?
8653 (EPOLLIN | EPOLLRDNORM) : 0;
8657 /* Is there any exceptional events? */
8658 if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue))
8660 (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? EPOLLPRI : 0);
8661 if (sk->sk_shutdown & RCV_SHUTDOWN)
8662 mask |= EPOLLRDHUP | EPOLLIN | EPOLLRDNORM;
8663 if (sk->sk_shutdown == SHUTDOWN_MASK)
8666 /* Is it readable? Reconsider this code with TCP-style support. */
8667 if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
8668 mask |= EPOLLIN | EPOLLRDNORM;
8670 /* The association is either gone or not ready. */
8671 if (!sctp_style(sk, UDP) && sctp_sstate(sk, CLOSED))
8674 /* Is it writable? */
8675 if (sctp_writeable(sk)) {
8676 mask |= EPOLLOUT | EPOLLWRNORM;
8678 sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk);
8680 * Since the socket is not locked, the buffer
8681 * might be made available after the writeable check and
8682 * before the bit is set. This could cause a lost I/O
8683 * signal. tcp_poll() has a race breaker for this race
8684 * condition. Based on their implementation, we put
8685 * in the following code to cover it as well.
8687 if (sctp_writeable(sk))
8688 mask |= EPOLLOUT | EPOLLWRNORM;
8693 /********************************************************************
8694 * 2nd Level Abstractions
8695 ********************************************************************/
8697 static struct sctp_bind_bucket *sctp_bucket_create(
8698 struct sctp_bind_hashbucket *head, struct net *net, unsigned short snum)
8700 struct sctp_bind_bucket *pp;
8702 pp = kmem_cache_alloc(sctp_bucket_cachep, GFP_ATOMIC);
8704 SCTP_DBG_OBJCNT_INC(bind_bucket);
8707 INIT_HLIST_HEAD(&pp->owner);
8709 hlist_add_head(&pp->node, &head->chain);
8714 /* Caller must hold hashbucket lock for this tb with local BH disabled */
8715 static void sctp_bucket_destroy(struct sctp_bind_bucket *pp)
8717 if (pp && hlist_empty(&pp->owner)) {
8718 __hlist_del(&pp->node);
8719 kmem_cache_free(sctp_bucket_cachep, pp);
8720 SCTP_DBG_OBJCNT_DEC(bind_bucket);
8724 /* Release this socket's reference to a local port. */
8725 static inline void __sctp_put_port(struct sock *sk)
8727 struct sctp_bind_hashbucket *head =
8728 &sctp_port_hashtable[sctp_phashfn(sock_net(sk),
8729 inet_sk(sk)->inet_num)];
8730 struct sctp_bind_bucket *pp;
8732 spin_lock(&head->lock);
8733 pp = sctp_sk(sk)->bind_hash;
8734 __sk_del_bind_node(sk);
8735 sctp_sk(sk)->bind_hash = NULL;
8736 inet_sk(sk)->inet_num = 0;
8737 sctp_bucket_destroy(pp);
8738 spin_unlock(&head->lock);
8741 void sctp_put_port(struct sock *sk)
8744 __sctp_put_port(sk);
8749 * The system picks an ephemeral port and choose an address set equivalent
8750 * to binding with a wildcard address.
8751 * One of those addresses will be the primary address for the association.
8752 * This automatically enables the multihoming capability of SCTP.
8754 static int sctp_autobind(struct sock *sk)
8756 union sctp_addr autoaddr;
8760 /* Initialize a local sockaddr structure to INADDR_ANY. */
8761 af = sctp_sk(sk)->pf->af;
8763 port = htons(inet_sk(sk)->inet_num);
8764 af->inaddr_any(&autoaddr, port);
8766 return sctp_do_bind(sk, &autoaddr, af->sockaddr_len);
8769 /* Parse out IPPROTO_SCTP CMSG headers. Perform only minimal validation.
8772 * 4.2 The cmsghdr Structure *
8774 * When ancillary data is sent or received, any number of ancillary data
8775 * objects can be specified by the msg_control and msg_controllen members of
8776 * the msghdr structure, because each object is preceded by
8777 * a cmsghdr structure defining the object's length (the cmsg_len member).
8778 * Historically Berkeley-derived implementations have passed only one object
8779 * at a time, but this API allows multiple objects to be
8780 * passed in a single call to sendmsg() or recvmsg(). The following example
8781 * shows two ancillary data objects in a control buffer.
8783 * |<--------------------------- msg_controllen -------------------------->|
8786 * |<----- ancillary data object ----->|<----- ancillary data object ----->|
8788 * |<---------- CMSG_SPACE() --------->|<---------- CMSG_SPACE() --------->|
8791 * |<---------- cmsg_len ---------->| |<--------- cmsg_len ----------->| |
8793 * |<--------- CMSG_LEN() --------->| |<-------- CMSG_LEN() ---------->| |
8796 * +-----+-----+-----+--+-----------+--+-----+-----+-----+--+-----------+--+
8797 * |cmsg_|cmsg_|cmsg_|XX| |XX|cmsg_|cmsg_|cmsg_|XX| |XX|
8799 * |len |level|type |XX|cmsg_data[]|XX|len |level|type |XX|cmsg_data[]|XX|
8801 * +-----+-----+-----+--+-----------+--+-----+-----+-----+--+-----------+--+
8808 static int sctp_msghdr_parse(const struct msghdr *msg, struct sctp_cmsgs *cmsgs)
8810 struct msghdr *my_msg = (struct msghdr *)msg;
8811 struct cmsghdr *cmsg;
8813 for_each_cmsghdr(cmsg, my_msg) {
8814 if (!CMSG_OK(my_msg, cmsg))
8817 /* Should we parse this header or ignore? */
8818 if (cmsg->cmsg_level != IPPROTO_SCTP)
8821 /* Strictly check lengths following example in SCM code. */
8822 switch (cmsg->cmsg_type) {
8824 /* SCTP Socket API Extension
8825 * 5.3.1 SCTP Initiation Structure (SCTP_INIT)
8827 * This cmsghdr structure provides information for
8828 * initializing new SCTP associations with sendmsg().
8829 * The SCTP_INITMSG socket option uses this same data
8830 * structure. This structure is not used for
8833 * cmsg_level cmsg_type cmsg_data[]
8834 * ------------ ------------ ----------------------
8835 * IPPROTO_SCTP SCTP_INIT struct sctp_initmsg
8837 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_initmsg)))
8840 cmsgs->init = CMSG_DATA(cmsg);
8844 /* SCTP Socket API Extension
8845 * 5.3.2 SCTP Header Information Structure(SCTP_SNDRCV)
8847 * This cmsghdr structure specifies SCTP options for
8848 * sendmsg() and describes SCTP header information
8849 * about a received message through recvmsg().
8851 * cmsg_level cmsg_type cmsg_data[]
8852 * ------------ ------------ ----------------------
8853 * IPPROTO_SCTP SCTP_SNDRCV struct sctp_sndrcvinfo
8855 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_sndrcvinfo)))
8858 cmsgs->srinfo = CMSG_DATA(cmsg);
8860 if (cmsgs->srinfo->sinfo_flags &
8861 ~(SCTP_UNORDERED | SCTP_ADDR_OVER |
8862 SCTP_SACK_IMMEDIATELY | SCTP_SENDALL |
8863 SCTP_PR_SCTP_MASK | SCTP_ABORT | SCTP_EOF))
8868 /* SCTP Socket API Extension
8869 * 5.3.4 SCTP Send Information Structure (SCTP_SNDINFO)
8871 * This cmsghdr structure specifies SCTP options for
8872 * sendmsg(). This structure and SCTP_RCVINFO replaces
8873 * SCTP_SNDRCV which has been deprecated.
8875 * cmsg_level cmsg_type cmsg_data[]
8876 * ------------ ------------ ---------------------
8877 * IPPROTO_SCTP SCTP_SNDINFO struct sctp_sndinfo
8879 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_sndinfo)))
8882 cmsgs->sinfo = CMSG_DATA(cmsg);
8884 if (cmsgs->sinfo->snd_flags &
8885 ~(SCTP_UNORDERED | SCTP_ADDR_OVER |
8886 SCTP_SACK_IMMEDIATELY | SCTP_SENDALL |
8887 SCTP_PR_SCTP_MASK | SCTP_ABORT | SCTP_EOF))
8891 /* SCTP Socket API Extension
8892 * 5.3.7 SCTP PR-SCTP Information Structure (SCTP_PRINFO)
8894 * This cmsghdr structure specifies SCTP options for sendmsg().
8896 * cmsg_level cmsg_type cmsg_data[]
8897 * ------------ ------------ ---------------------
8898 * IPPROTO_SCTP SCTP_PRINFO struct sctp_prinfo
8900 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_prinfo)))
8903 cmsgs->prinfo = CMSG_DATA(cmsg);
8904 if (cmsgs->prinfo->pr_policy & ~SCTP_PR_SCTP_MASK)
8907 if (cmsgs->prinfo->pr_policy == SCTP_PR_SCTP_NONE)
8908 cmsgs->prinfo->pr_value = 0;
8911 /* SCTP Socket API Extension
8912 * 5.3.8 SCTP AUTH Information Structure (SCTP_AUTHINFO)
8914 * This cmsghdr structure specifies SCTP options for sendmsg().
8916 * cmsg_level cmsg_type cmsg_data[]
8917 * ------------ ------------ ---------------------
8918 * IPPROTO_SCTP SCTP_AUTHINFO struct sctp_authinfo
8920 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_authinfo)))
8923 cmsgs->authinfo = CMSG_DATA(cmsg);
8925 case SCTP_DSTADDRV4:
8926 case SCTP_DSTADDRV6:
8927 /* SCTP Socket API Extension
8928 * 5.3.9/10 SCTP Destination IPv4/6 Address Structure (SCTP_DSTADDRV4/6)
8930 * This cmsghdr structure specifies SCTP options for sendmsg().
8932 * cmsg_level cmsg_type cmsg_data[]
8933 * ------------ ------------ ---------------------
8934 * IPPROTO_SCTP SCTP_DSTADDRV4 struct in_addr
8935 * ------------ ------------ ---------------------
8936 * IPPROTO_SCTP SCTP_DSTADDRV6 struct in6_addr
8938 cmsgs->addrs_msg = my_msg;
8949 * Wait for a packet..
8950 * Note: This function is the same function as in core/datagram.c
8951 * with a few modifications to make lksctp work.
8953 static int sctp_wait_for_packet(struct sock *sk, int *err, long *timeo_p)
8958 prepare_to_wait_exclusive(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
8960 /* Socket errors? */
8961 error = sock_error(sk);
8965 if (!skb_queue_empty(&sk->sk_receive_queue))
8968 /* Socket shut down? */
8969 if (sk->sk_shutdown & RCV_SHUTDOWN)
8972 /* Sequenced packets can come disconnected. If so we report the
8977 /* Is there a good reason to think that we may receive some data? */
8978 if (list_empty(&sctp_sk(sk)->ep->asocs) && !sctp_sstate(sk, LISTENING))
8981 /* Handle signals. */
8982 if (signal_pending(current))
8985 /* Let another process have a go. Since we are going to sleep
8986 * anyway. Note: This may cause odd behaviors if the message
8987 * does not fit in the user's buffer, but this seems to be the
8988 * only way to honor MSG_DONTWAIT realistically.
8991 *timeo_p = schedule_timeout(*timeo_p);
8995 finish_wait(sk_sleep(sk), &wait);
8999 error = sock_intr_errno(*timeo_p);
9002 finish_wait(sk_sleep(sk), &wait);
9007 /* Receive a datagram.
9008 * Note: This is pretty much the same routine as in core/datagram.c
9009 * with a few changes to make lksctp work.
9011 struct sk_buff *sctp_skb_recv_datagram(struct sock *sk, int flags,
9012 int noblock, int *err)
9015 struct sk_buff *skb;
9018 timeo = sock_rcvtimeo(sk, noblock);
9020 pr_debug("%s: timeo:%ld, max:%ld\n", __func__, timeo,
9021 MAX_SCHEDULE_TIMEOUT);
9024 /* Again only user level code calls this function,
9025 * so nothing interrupt level
9026 * will suddenly eat the receive_queue.
9028 * Look at current nfs client by the way...
9029 * However, this function was correct in any case. 8)
9031 if (flags & MSG_PEEK) {
9032 skb = skb_peek(&sk->sk_receive_queue);
9034 refcount_inc(&skb->users);
9036 skb = __skb_dequeue(&sk->sk_receive_queue);
9042 /* Caller is allowed not to check sk->sk_err before calling. */
9043 error = sock_error(sk);
9047 if (sk->sk_shutdown & RCV_SHUTDOWN)
9050 if (sk_can_busy_loop(sk)) {
9051 sk_busy_loop(sk, noblock);
9053 if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
9057 /* User doesn't want to wait. */
9061 } while (sctp_wait_for_packet(sk, err, &timeo) == 0);
9070 /* If sndbuf has changed, wake up per association sndbuf waiters. */
9071 static void __sctp_write_space(struct sctp_association *asoc)
9073 struct sock *sk = asoc->base.sk;
9075 if (sctp_wspace(asoc) <= 0)
9078 if (waitqueue_active(&asoc->wait))
9079 wake_up_interruptible(&asoc->wait);
9081 if (sctp_writeable(sk)) {
9082 struct socket_wq *wq;
9085 wq = rcu_dereference(sk->sk_wq);
9087 if (waitqueue_active(&wq->wait))
9088 wake_up_interruptible(&wq->wait);
9090 /* Note that we try to include the Async I/O support
9091 * here by modeling from the current TCP/UDP code.
9092 * We have not tested with it yet.
9094 if (!(sk->sk_shutdown & SEND_SHUTDOWN))
9095 sock_wake_async(wq, SOCK_WAKE_SPACE, POLL_OUT);
9101 static void sctp_wake_up_waiters(struct sock *sk,
9102 struct sctp_association *asoc)
9104 struct sctp_association *tmp = asoc;
9106 /* We do accounting for the sndbuf space per association,
9107 * so we only need to wake our own association.
9109 if (asoc->ep->sndbuf_policy)
9110 return __sctp_write_space(asoc);
9112 /* If association goes down and is just flushing its
9113 * outq, then just normally notify others.
9115 if (asoc->base.dead)
9116 return sctp_write_space(sk);
9118 /* Accounting for the sndbuf space is per socket, so we
9119 * need to wake up others, try to be fair and in case of
9120 * other associations, let them have a go first instead
9121 * of just doing a sctp_write_space() call.
9123 * Note that we reach sctp_wake_up_waiters() only when
9124 * associations free up queued chunks, thus we are under
9125 * lock and the list of associations on a socket is
9126 * guaranteed not to change.
9128 for (tmp = list_next_entry(tmp, asocs); 1;
9129 tmp = list_next_entry(tmp, asocs)) {
9130 /* Manually skip the head element. */
9131 if (&tmp->asocs == &((sctp_sk(sk))->ep->asocs))
9133 /* Wake up association. */
9134 __sctp_write_space(tmp);
9135 /* We've reached the end. */
9141 /* Do accounting for the sndbuf space.
9142 * Decrement the used sndbuf space of the corresponding association by the
9143 * data size which was just transmitted(freed).
9145 static void sctp_wfree(struct sk_buff *skb)
9147 struct sctp_chunk *chunk = skb_shinfo(skb)->destructor_arg;
9148 struct sctp_association *asoc = chunk->asoc;
9149 struct sock *sk = asoc->base.sk;
9151 sk_mem_uncharge(sk, skb->truesize);
9152 sk_wmem_queued_add(sk, -(skb->truesize + sizeof(struct sctp_chunk)));
9153 asoc->sndbuf_used -= skb->truesize + sizeof(struct sctp_chunk);
9154 WARN_ON(refcount_sub_and_test(sizeof(struct sctp_chunk),
9155 &sk->sk_wmem_alloc));
9158 struct sctp_shared_key *shkey = chunk->shkey;
9160 /* refcnt == 2 and !list_empty mean after this release, it's
9161 * not being used anywhere, and it's time to notify userland
9162 * that this shkey can be freed if it's been deactivated.
9164 if (shkey->deactivated && !list_empty(&shkey->key_list) &&
9165 refcount_read(&shkey->refcnt) == 2) {
9166 struct sctp_ulpevent *ev;
9168 ev = sctp_ulpevent_make_authkey(asoc, shkey->key_id,
9172 asoc->stream.si->enqueue_event(&asoc->ulpq, ev);
9174 sctp_auth_shkey_release(chunk->shkey);
9178 sctp_wake_up_waiters(sk, asoc);
9180 sctp_association_put(asoc);
9183 /* Do accounting for the receive space on the socket.
9184 * Accounting for the association is done in ulpevent.c
9185 * We set this as a destructor for the cloned data skbs so that
9186 * accounting is done at the correct time.
9188 void sctp_sock_rfree(struct sk_buff *skb)
9190 struct sock *sk = skb->sk;
9191 struct sctp_ulpevent *event = sctp_skb2event(skb);
9193 atomic_sub(event->rmem_len, &sk->sk_rmem_alloc);
9196 * Mimic the behavior of sock_rfree
9198 sk_mem_uncharge(sk, event->rmem_len);
9202 /* Helper function to wait for space in the sndbuf. */
9203 static int sctp_wait_for_sndbuf(struct sctp_association *asoc, long *timeo_p,
9206 struct sock *sk = asoc->base.sk;
9207 long current_timeo = *timeo_p;
9211 pr_debug("%s: asoc:%p, timeo:%ld, msg_len:%zu\n", __func__, asoc,
9214 /* Increment the association's refcnt. */
9215 sctp_association_hold(asoc);
9217 /* Wait on the association specific sndbuf space. */
9219 prepare_to_wait_exclusive(&asoc->wait, &wait,
9220 TASK_INTERRUPTIBLE);
9221 if (asoc->base.dead)
9225 if (sk->sk_err || asoc->state >= SCTP_STATE_SHUTDOWN_PENDING)
9227 if (signal_pending(current))
9228 goto do_interrupted;
9229 if (sk_under_memory_pressure(sk))
9231 if ((int)msg_len <= sctp_wspace(asoc) &&
9232 sk_wmem_schedule(sk, msg_len))
9235 /* Let another process have a go. Since we are going
9239 current_timeo = schedule_timeout(current_timeo);
9241 if (sk != asoc->base.sk)
9244 *timeo_p = current_timeo;
9248 finish_wait(&asoc->wait, &wait);
9250 /* Release the association's refcnt. */
9251 sctp_association_put(asoc);
9264 err = sock_intr_errno(*timeo_p);
9272 void sctp_data_ready(struct sock *sk)
9274 struct socket_wq *wq;
9277 wq = rcu_dereference(sk->sk_wq);
9278 if (skwq_has_sleeper(wq))
9279 wake_up_interruptible_sync_poll(&wq->wait, EPOLLIN |
9280 EPOLLRDNORM | EPOLLRDBAND);
9281 sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_IN);
9285 /* If socket sndbuf has changed, wake up all per association waiters. */
9286 void sctp_write_space(struct sock *sk)
9288 struct sctp_association *asoc;
9290 /* Wake up the tasks in each wait queue. */
9291 list_for_each_entry(asoc, &((sctp_sk(sk))->ep->asocs), asocs) {
9292 __sctp_write_space(asoc);
9296 /* Is there any sndbuf space available on the socket?
9298 * Note that sk_wmem_alloc is the sum of the send buffers on all of the
9299 * associations on the same socket. For a UDP-style socket with
9300 * multiple associations, it is possible for it to be "unwriteable"
9301 * prematurely. I assume that this is acceptable because
9302 * a premature "unwriteable" is better than an accidental "writeable" which
9303 * would cause an unwanted block under certain circumstances. For the 1-1
9304 * UDP-style sockets or TCP-style sockets, this code should work.
9307 static bool sctp_writeable(const struct sock *sk)
9309 return READ_ONCE(sk->sk_sndbuf) > READ_ONCE(sk->sk_wmem_queued);
9312 /* Wait for an association to go into ESTABLISHED state. If timeout is 0,
9313 * returns immediately with EINPROGRESS.
9315 static int sctp_wait_for_connect(struct sctp_association *asoc, long *timeo_p)
9317 struct sock *sk = asoc->base.sk;
9319 long current_timeo = *timeo_p;
9322 pr_debug("%s: asoc:%p, timeo:%ld\n", __func__, asoc, *timeo_p);
9324 /* Increment the association's refcnt. */
9325 sctp_association_hold(asoc);
9328 prepare_to_wait_exclusive(&asoc->wait, &wait,
9329 TASK_INTERRUPTIBLE);
9332 if (sk->sk_shutdown & RCV_SHUTDOWN)
9334 if (sk->sk_err || asoc->state >= SCTP_STATE_SHUTDOWN_PENDING ||
9337 if (signal_pending(current))
9338 goto do_interrupted;
9340 if (sctp_state(asoc, ESTABLISHED))
9343 /* Let another process have a go. Since we are going
9347 current_timeo = schedule_timeout(current_timeo);
9350 *timeo_p = current_timeo;
9354 finish_wait(&asoc->wait, &wait);
9356 /* Release the association's refcnt. */
9357 sctp_association_put(asoc);
9362 if (asoc->init_err_counter + 1 > asoc->max_init_attempts)
9365 err = -ECONNREFUSED;
9369 err = sock_intr_errno(*timeo_p);
9377 static int sctp_wait_for_accept(struct sock *sk, long timeo)
9379 struct sctp_endpoint *ep;
9383 ep = sctp_sk(sk)->ep;
9387 prepare_to_wait_exclusive(sk_sleep(sk), &wait,
9388 TASK_INTERRUPTIBLE);
9390 if (list_empty(&ep->asocs)) {
9392 timeo = schedule_timeout(timeo);
9397 if (!sctp_sstate(sk, LISTENING))
9401 if (!list_empty(&ep->asocs))
9404 err = sock_intr_errno(timeo);
9405 if (signal_pending(current))
9413 finish_wait(sk_sleep(sk), &wait);
9418 static void sctp_wait_for_close(struct sock *sk, long timeout)
9423 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
9424 if (list_empty(&sctp_sk(sk)->ep->asocs))
9427 timeout = schedule_timeout(timeout);
9429 } while (!signal_pending(current) && timeout);
9431 finish_wait(sk_sleep(sk), &wait);
9434 static void sctp_skb_set_owner_r_frag(struct sk_buff *skb, struct sock *sk)
9436 struct sk_buff *frag;
9441 /* Don't forget the fragments. */
9442 skb_walk_frags(skb, frag)
9443 sctp_skb_set_owner_r_frag(frag, sk);
9446 sctp_skb_set_owner_r(skb, sk);
9449 void sctp_copy_sock(struct sock *newsk, struct sock *sk,
9450 struct sctp_association *asoc)
9452 struct inet_sock *inet = inet_sk(sk);
9453 struct inet_sock *newinet;
9454 struct sctp_sock *sp = sctp_sk(sk);
9455 struct sctp_endpoint *ep = sp->ep;
9457 newsk->sk_type = sk->sk_type;
9458 newsk->sk_bound_dev_if = sk->sk_bound_dev_if;
9459 newsk->sk_flags = sk->sk_flags;
9460 newsk->sk_tsflags = sk->sk_tsflags;
9461 newsk->sk_no_check_tx = sk->sk_no_check_tx;
9462 newsk->sk_no_check_rx = sk->sk_no_check_rx;
9463 newsk->sk_reuse = sk->sk_reuse;
9464 sctp_sk(newsk)->reuse = sp->reuse;
9466 newsk->sk_shutdown = sk->sk_shutdown;
9467 newsk->sk_destruct = sk->sk_destruct;
9468 newsk->sk_family = sk->sk_family;
9469 newsk->sk_protocol = IPPROTO_SCTP;
9470 newsk->sk_backlog_rcv = sk->sk_prot->backlog_rcv;
9471 newsk->sk_sndbuf = sk->sk_sndbuf;
9472 newsk->sk_rcvbuf = sk->sk_rcvbuf;
9473 newsk->sk_lingertime = sk->sk_lingertime;
9474 newsk->sk_rcvtimeo = sk->sk_rcvtimeo;
9475 newsk->sk_sndtimeo = sk->sk_sndtimeo;
9476 newsk->sk_rxhash = sk->sk_rxhash;
9478 newinet = inet_sk(newsk);
9480 /* Initialize sk's sport, dport, rcv_saddr and daddr for
9481 * getsockname() and getpeername()
9483 newinet->inet_sport = inet->inet_sport;
9484 newinet->inet_saddr = inet->inet_saddr;
9485 newinet->inet_rcv_saddr = inet->inet_rcv_saddr;
9486 newinet->inet_dport = htons(asoc->peer.port);
9487 newinet->pmtudisc = inet->pmtudisc;
9488 newinet->inet_id = prandom_u32();
9490 newinet->uc_ttl = inet->uc_ttl;
9491 newinet->mc_loop = 1;
9492 newinet->mc_ttl = 1;
9493 newinet->mc_index = 0;
9494 newinet->mc_list = NULL;
9496 if (newsk->sk_flags & SK_FLAGS_TIMESTAMP)
9497 net_enable_timestamp();
9499 /* Set newsk security attributes from original sk and connection
9500 * security attribute from ep.
9502 security_sctp_sk_clone(ep, sk, newsk);
9505 static inline void sctp_copy_descendant(struct sock *sk_to,
9506 const struct sock *sk_from)
9508 size_t ancestor_size = sizeof(struct inet_sock);
9510 ancestor_size += sk_from->sk_prot->obj_size;
9511 ancestor_size -= offsetof(struct sctp_sock, pd_lobby);
9512 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
9515 /* Populate the fields of the newsk from the oldsk and migrate the assoc
9516 * and its messages to the newsk.
9518 static int sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
9519 struct sctp_association *assoc,
9520 enum sctp_socket_type type)
9522 struct sctp_sock *oldsp = sctp_sk(oldsk);
9523 struct sctp_sock *newsp = sctp_sk(newsk);
9524 struct sctp_bind_bucket *pp; /* hash list port iterator */
9525 struct sctp_endpoint *newep = newsp->ep;
9526 struct sk_buff *skb, *tmp;
9527 struct sctp_ulpevent *event;
9528 struct sctp_bind_hashbucket *head;
9531 /* Migrate socket buffer sizes and all the socket level options to the
9534 newsk->sk_sndbuf = oldsk->sk_sndbuf;
9535 newsk->sk_rcvbuf = oldsk->sk_rcvbuf;
9536 /* Brute force copy old sctp opt. */
9537 sctp_copy_descendant(newsk, oldsk);
9539 /* Restore the ep value that was overwritten with the above structure
9545 /* Hook this new socket in to the bind_hash list. */
9546 head = &sctp_port_hashtable[sctp_phashfn(sock_net(oldsk),
9547 inet_sk(oldsk)->inet_num)];
9548 spin_lock_bh(&head->lock);
9549 pp = sctp_sk(oldsk)->bind_hash;
9550 sk_add_bind_node(newsk, &pp->owner);
9551 sctp_sk(newsk)->bind_hash = pp;
9552 inet_sk(newsk)->inet_num = inet_sk(oldsk)->inet_num;
9553 spin_unlock_bh(&head->lock);
9555 /* Copy the bind_addr list from the original endpoint to the new
9556 * endpoint so that we can handle restarts properly
9558 err = sctp_bind_addr_dup(&newsp->ep->base.bind_addr,
9559 &oldsp->ep->base.bind_addr, GFP_KERNEL);
9563 /* New ep's auth_hmacs should be set if old ep's is set, in case
9564 * that net->sctp.auth_enable has been changed to 0 by users and
9565 * new ep's auth_hmacs couldn't be set in sctp_endpoint_init().
9567 if (oldsp->ep->auth_hmacs) {
9568 err = sctp_auth_init_hmacs(newsp->ep, GFP_KERNEL);
9573 sctp_auto_asconf_init(newsp);
9575 /* Move any messages in the old socket's receive queue that are for the
9576 * peeled off association to the new socket's receive queue.
9578 sctp_skb_for_each(skb, &oldsk->sk_receive_queue, tmp) {
9579 event = sctp_skb2event(skb);
9580 if (event->asoc == assoc) {
9581 __skb_unlink(skb, &oldsk->sk_receive_queue);
9582 __skb_queue_tail(&newsk->sk_receive_queue, skb);
9583 sctp_skb_set_owner_r_frag(skb, newsk);
9587 /* Clean up any messages pending delivery due to partial
9588 * delivery. Three cases:
9589 * 1) No partial deliver; no work.
9590 * 2) Peeling off partial delivery; keep pd_lobby in new pd_lobby.
9591 * 3) Peeling off non-partial delivery; move pd_lobby to receive_queue.
9593 atomic_set(&sctp_sk(newsk)->pd_mode, assoc->ulpq.pd_mode);
9595 if (atomic_read(&sctp_sk(oldsk)->pd_mode)) {
9596 struct sk_buff_head *queue;
9598 /* Decide which queue to move pd_lobby skbs to. */
9599 if (assoc->ulpq.pd_mode) {
9600 queue = &newsp->pd_lobby;
9602 queue = &newsk->sk_receive_queue;
9604 /* Walk through the pd_lobby, looking for skbs that
9605 * need moved to the new socket.
9607 sctp_skb_for_each(skb, &oldsp->pd_lobby, tmp) {
9608 event = sctp_skb2event(skb);
9609 if (event->asoc == assoc) {
9610 __skb_unlink(skb, &oldsp->pd_lobby);
9611 __skb_queue_tail(queue, skb);
9612 sctp_skb_set_owner_r_frag(skb, newsk);
9616 /* Clear up any skbs waiting for the partial
9617 * delivery to finish.
9619 if (assoc->ulpq.pd_mode)
9620 sctp_clear_pd(oldsk, NULL);
9624 sctp_for_each_rx_skb(assoc, newsk, sctp_skb_set_owner_r_frag);
9626 /* Set the type of socket to indicate that it is peeled off from the
9627 * original UDP-style socket or created with the accept() call on a
9628 * TCP-style socket..
9632 /* Mark the new socket "in-use" by the user so that any packets
9633 * that may arrive on the association after we've moved it are
9634 * queued to the backlog. This prevents a potential race between
9635 * backlog processing on the old socket and new-packet processing
9636 * on the new socket.
9638 * The caller has just allocated newsk so we can guarantee that other
9639 * paths won't try to lock it and then oldsk.
9641 lock_sock_nested(newsk, SINGLE_DEPTH_NESTING);
9642 sctp_for_each_tx_datachunk(assoc, true, sctp_clear_owner_w);
9643 sctp_assoc_migrate(assoc, newsk);
9644 sctp_for_each_tx_datachunk(assoc, false, sctp_set_owner_w);
9646 /* If the association on the newsk is already closed before accept()
9647 * is called, set RCV_SHUTDOWN flag.
9649 if (sctp_state(assoc, CLOSED) && sctp_style(newsk, TCP)) {
9650 inet_sk_set_state(newsk, SCTP_SS_CLOSED);
9651 newsk->sk_shutdown |= RCV_SHUTDOWN;
9653 inet_sk_set_state(newsk, SCTP_SS_ESTABLISHED);
9656 release_sock(newsk);
9662 /* This proto struct describes the ULP interface for SCTP. */
9663 struct proto sctp_prot = {
9665 .owner = THIS_MODULE,
9666 .close = sctp_close,
9667 .disconnect = sctp_disconnect,
9668 .accept = sctp_accept,
9669 .ioctl = sctp_ioctl,
9670 .init = sctp_init_sock,
9671 .destroy = sctp_destroy_sock,
9672 .shutdown = sctp_shutdown,
9673 .setsockopt = sctp_setsockopt,
9674 .getsockopt = sctp_getsockopt,
9675 .bpf_bypass_getsockopt = sctp_bpf_bypass_getsockopt,
9676 .sendmsg = sctp_sendmsg,
9677 .recvmsg = sctp_recvmsg,
9679 .bind_add = sctp_bind_add,
9680 .backlog_rcv = sctp_backlog_rcv,
9682 .unhash = sctp_unhash,
9683 .no_autobind = true,
9684 .obj_size = sizeof(struct sctp_sock),
9685 .useroffset = offsetof(struct sctp_sock, subscribe),
9686 .usersize = offsetof(struct sctp_sock, initmsg) -
9687 offsetof(struct sctp_sock, subscribe) +
9688 sizeof_field(struct sctp_sock, initmsg),
9689 .sysctl_mem = sysctl_sctp_mem,
9690 .sysctl_rmem = sysctl_sctp_rmem,
9691 .sysctl_wmem = sysctl_sctp_wmem,
9692 .memory_pressure = &sctp_memory_pressure,
9693 .enter_memory_pressure = sctp_enter_memory_pressure,
9694 .memory_allocated = &sctp_memory_allocated,
9695 .sockets_allocated = &sctp_sockets_allocated,
9698 #if IS_ENABLED(CONFIG_IPV6)
9700 static void sctp_v6_destruct_sock(struct sock *sk)
9702 sctp_destruct_common(sk);
9703 inet6_sock_destruct(sk);
9706 static int sctp_v6_init_sock(struct sock *sk)
9708 int ret = sctp_init_sock(sk);
9711 sk->sk_destruct = sctp_v6_destruct_sock;
9716 struct proto sctpv6_prot = {
9718 .owner = THIS_MODULE,
9719 .close = sctp_close,
9720 .disconnect = sctp_disconnect,
9721 .accept = sctp_accept,
9722 .ioctl = sctp_ioctl,
9723 .init = sctp_v6_init_sock,
9724 .destroy = sctp_destroy_sock,
9725 .shutdown = sctp_shutdown,
9726 .setsockopt = sctp_setsockopt,
9727 .getsockopt = sctp_getsockopt,
9728 .bpf_bypass_getsockopt = sctp_bpf_bypass_getsockopt,
9729 .sendmsg = sctp_sendmsg,
9730 .recvmsg = sctp_recvmsg,
9732 .bind_add = sctp_bind_add,
9733 .backlog_rcv = sctp_backlog_rcv,
9735 .unhash = sctp_unhash,
9736 .no_autobind = true,
9737 .obj_size = sizeof(struct sctp6_sock),
9738 .useroffset = offsetof(struct sctp6_sock, sctp.subscribe),
9739 .usersize = offsetof(struct sctp6_sock, sctp.initmsg) -
9740 offsetof(struct sctp6_sock, sctp.subscribe) +
9741 sizeof_field(struct sctp6_sock, sctp.initmsg),
9742 .sysctl_mem = sysctl_sctp_mem,
9743 .sysctl_rmem = sysctl_sctp_rmem,
9744 .sysctl_wmem = sysctl_sctp_wmem,
9745 .memory_pressure = &sctp_memory_pressure,
9746 .enter_memory_pressure = sctp_enter_memory_pressure,
9747 .memory_allocated = &sctp_memory_allocated,
9748 .sockets_allocated = &sctp_sockets_allocated,
9750 #endif /* IS_ENABLED(CONFIG_IPV6) */