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 static DEFINE_PER_CPU(int, sctp_memory_per_cpu_fw_alloc);
97 struct percpu_counter sctp_sockets_allocated;
99 static void sctp_enter_memory_pressure(struct sock *sk)
101 WRITE_ONCE(sctp_memory_pressure, 1);
105 /* Get the sndbuf space available at the time on the association. */
106 static inline int sctp_wspace(struct sctp_association *asoc)
108 struct sock *sk = asoc->base.sk;
110 return asoc->ep->sndbuf_policy ? sk->sk_sndbuf - asoc->sndbuf_used
111 : sk_stream_wspace(sk);
114 /* Increment the used sndbuf space count of the corresponding association by
115 * the size of the outgoing data chunk.
116 * Also, set the skb destructor for sndbuf accounting later.
118 * Since it is always 1-1 between chunk and skb, and also a new skb is always
119 * allocated for chunk bundling in sctp_packet_transmit(), we can use the
120 * destructor in the data chunk skb for the purpose of the sndbuf space
123 static inline void sctp_set_owner_w(struct sctp_chunk *chunk)
125 struct sctp_association *asoc = chunk->asoc;
126 struct sock *sk = asoc->base.sk;
128 /* The sndbuf space is tracked per association. */
129 sctp_association_hold(asoc);
132 sctp_auth_shkey_hold(chunk->shkey);
134 skb_set_owner_w(chunk->skb, sk);
136 chunk->skb->destructor = sctp_wfree;
137 /* Save the chunk pointer in skb for sctp_wfree to use later. */
138 skb_shinfo(chunk->skb)->destructor_arg = chunk;
140 refcount_add(sizeof(struct sctp_chunk), &sk->sk_wmem_alloc);
141 asoc->sndbuf_used += chunk->skb->truesize + sizeof(struct sctp_chunk);
142 sk_wmem_queued_add(sk, chunk->skb->truesize + sizeof(struct sctp_chunk));
143 sk_mem_charge(sk, chunk->skb->truesize);
146 static void sctp_clear_owner_w(struct sctp_chunk *chunk)
148 skb_orphan(chunk->skb);
151 #define traverse_and_process() \
154 if (msg == prev_msg) \
156 list_for_each_entry(c, &msg->chunks, frag_list) { \
157 if ((clear && asoc->base.sk == c->skb->sk) || \
158 (!clear && asoc->base.sk != c->skb->sk)) \
164 static void sctp_for_each_tx_datachunk(struct sctp_association *asoc,
166 void (*cb)(struct sctp_chunk *))
169 struct sctp_datamsg *msg, *prev_msg = NULL;
170 struct sctp_outq *q = &asoc->outqueue;
171 struct sctp_chunk *chunk, *c;
172 struct sctp_transport *t;
174 list_for_each_entry(t, &asoc->peer.transport_addr_list, transports)
175 list_for_each_entry(chunk, &t->transmitted, transmitted_list)
176 traverse_and_process();
178 list_for_each_entry(chunk, &q->retransmit, transmitted_list)
179 traverse_and_process();
181 list_for_each_entry(chunk, &q->sacked, transmitted_list)
182 traverse_and_process();
184 list_for_each_entry(chunk, &q->abandoned, transmitted_list)
185 traverse_and_process();
187 list_for_each_entry(chunk, &q->out_chunk_list, list)
188 traverse_and_process();
191 static void sctp_for_each_rx_skb(struct sctp_association *asoc, struct sock *sk,
192 void (*cb)(struct sk_buff *, struct sock *))
195 struct sk_buff *skb, *tmp;
197 sctp_skb_for_each(skb, &asoc->ulpq.lobby, tmp)
200 sctp_skb_for_each(skb, &asoc->ulpq.reasm, tmp)
203 sctp_skb_for_each(skb, &asoc->ulpq.reasm_uo, tmp)
207 /* Verify that this is a valid address. */
208 static inline int sctp_verify_addr(struct sock *sk, union sctp_addr *addr,
213 /* Verify basic sockaddr. */
214 af = sctp_sockaddr_af(sctp_sk(sk), addr, len);
218 /* Is this a valid SCTP address? */
219 if (!af->addr_valid(addr, sctp_sk(sk), NULL))
222 if (!sctp_sk(sk)->pf->send_verify(sctp_sk(sk), (addr)))
228 /* Look up the association by its id. If this is not a UDP-style
229 * socket, the ID field is always ignored.
231 struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id)
233 struct sctp_association *asoc = NULL;
235 /* If this is not a UDP-style socket, assoc id should be ignored. */
236 if (!sctp_style(sk, UDP)) {
237 /* Return NULL if the socket state is not ESTABLISHED. It
238 * could be a TCP-style listening socket or a socket which
239 * hasn't yet called connect() to establish an association.
241 if (!sctp_sstate(sk, ESTABLISHED) && !sctp_sstate(sk, CLOSING))
244 /* Get the first and the only association from the list. */
245 if (!list_empty(&sctp_sk(sk)->ep->asocs))
246 asoc = list_entry(sctp_sk(sk)->ep->asocs.next,
247 struct sctp_association, asocs);
251 /* Otherwise this is a UDP-style socket. */
252 if (id <= SCTP_ALL_ASSOC)
255 spin_lock_bh(&sctp_assocs_id_lock);
256 asoc = (struct sctp_association *)idr_find(&sctp_assocs_id, (int)id);
257 if (asoc && (asoc->base.sk != sk || asoc->base.dead))
259 spin_unlock_bh(&sctp_assocs_id_lock);
264 /* Look up the transport from an address and an assoc id. If both address and
265 * id are specified, the associations matching the address and the id should be
268 static struct sctp_transport *sctp_addr_id2transport(struct sock *sk,
269 struct sockaddr_storage *addr,
272 struct sctp_association *addr_asoc = NULL, *id_asoc = NULL;
273 struct sctp_af *af = sctp_get_af_specific(addr->ss_family);
274 union sctp_addr *laddr = (union sctp_addr *)addr;
275 struct sctp_transport *transport;
277 if (!af || sctp_verify_addr(sk, laddr, af->sockaddr_len))
280 addr_asoc = sctp_endpoint_lookup_assoc(sctp_sk(sk)->ep,
287 id_asoc = sctp_id2assoc(sk, id);
288 if (id_asoc && (id_asoc != addr_asoc))
291 sctp_get_pf_specific(sk->sk_family)->addr_to_user(sctp_sk(sk),
292 (union sctp_addr *)addr);
297 /* API 3.1.2 bind() - UDP Style Syntax
298 * The syntax of bind() is,
300 * ret = bind(int sd, struct sockaddr *addr, int addrlen);
302 * sd - the socket descriptor returned by socket().
303 * addr - the address structure (struct sockaddr_in or struct
304 * sockaddr_in6 [RFC 2553]),
305 * addr_len - the size of the address structure.
307 static int sctp_bind(struct sock *sk, struct sockaddr *addr, int addr_len)
313 pr_debug("%s: sk:%p, addr:%p, addr_len:%d\n", __func__, sk,
316 /* Disallow binding twice. */
317 if (!sctp_sk(sk)->ep->base.bind_addr.port)
318 retval = sctp_do_bind(sk, (union sctp_addr *)addr,
328 static int sctp_get_port_local(struct sock *, union sctp_addr *);
330 /* Verify this is a valid sockaddr. */
331 static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt,
332 union sctp_addr *addr, int len)
336 /* Check minimum size. */
337 if (len < sizeof (struct sockaddr))
340 if (!opt->pf->af_supported(addr->sa.sa_family, opt))
343 if (addr->sa.sa_family == AF_INET6) {
344 if (len < SIN6_LEN_RFC2133)
346 /* V4 mapped address are really of AF_INET family */
347 if (ipv6_addr_v4mapped(&addr->v6.sin6_addr) &&
348 !opt->pf->af_supported(AF_INET, opt))
352 /* If we get this far, af is valid. */
353 af = sctp_get_af_specific(addr->sa.sa_family);
355 if (len < af->sockaddr_len)
361 static void sctp_auto_asconf_init(struct sctp_sock *sp)
363 struct net *net = sock_net(&sp->inet.sk);
365 if (net->sctp.default_auto_asconf) {
366 spin_lock_bh(&net->sctp.addr_wq_lock);
367 list_add_tail(&sp->auto_asconf_list, &net->sctp.auto_asconf_splist);
368 spin_unlock_bh(&net->sctp.addr_wq_lock);
369 sp->do_auto_asconf = 1;
373 /* Bind a local address either to an endpoint or to an association. */
374 static int sctp_do_bind(struct sock *sk, union sctp_addr *addr, int len)
376 struct net *net = sock_net(sk);
377 struct sctp_sock *sp = sctp_sk(sk);
378 struct sctp_endpoint *ep = sp->ep;
379 struct sctp_bind_addr *bp = &ep->base.bind_addr;
384 /* Common sockaddr verification. */
385 af = sctp_sockaddr_af(sp, addr, len);
387 pr_debug("%s: sk:%p, newaddr:%p, len:%d EINVAL\n",
388 __func__, sk, addr, len);
392 snum = ntohs(addr->v4.sin_port);
394 pr_debug("%s: sk:%p, new addr:%pISc, port:%d, new port:%d, len:%d\n",
395 __func__, sk, &addr->sa, bp->port, snum, len);
397 /* PF specific bind() address verification. */
398 if (!sp->pf->bind_verify(sp, addr))
399 return -EADDRNOTAVAIL;
401 /* We must either be unbound, or bind to the same port.
402 * It's OK to allow 0 ports if we are already bound.
403 * We'll just inhert an already bound port in this case
408 else if (snum != bp->port) {
409 pr_debug("%s: new port %d doesn't match existing port "
410 "%d\n", __func__, snum, bp->port);
415 if (snum && inet_port_requires_bind_service(net, snum) &&
416 !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
419 /* See if the address matches any of the addresses we may have
420 * already bound before checking against other endpoints.
422 if (sctp_bind_addr_match(bp, addr, sp))
425 /* Make sure we are allowed to bind here.
426 * The function sctp_get_port_local() does duplicate address
429 addr->v4.sin_port = htons(snum);
430 if (sctp_get_port_local(sk, addr))
433 /* Refresh ephemeral port. */
435 bp->port = inet_sk(sk)->inet_num;
436 sctp_auto_asconf_init(sp);
439 /* Add the address to the bind address list.
440 * Use GFP_ATOMIC since BHs will be disabled.
442 ret = sctp_add_bind_addr(bp, addr, af->sockaddr_len,
443 SCTP_ADDR_SRC, GFP_ATOMIC);
449 /* Copy back into socket for getsockname() use. */
450 inet_sk(sk)->inet_sport = htons(inet_sk(sk)->inet_num);
451 sp->pf->to_sk_saddr(addr, sk);
456 /* ADDIP Section 4.1.1 Congestion Control of ASCONF Chunks
458 * R1) One and only one ASCONF Chunk MAY be in transit and unacknowledged
459 * at any one time. If a sender, after sending an ASCONF chunk, decides
460 * it needs to transfer another ASCONF Chunk, it MUST wait until the
461 * ASCONF-ACK Chunk returns from the previous ASCONF Chunk before sending a
462 * subsequent ASCONF. Note this restriction binds each side, so at any
463 * time two ASCONF may be in-transit on any given association (one sent
464 * from each endpoint).
466 static int sctp_send_asconf(struct sctp_association *asoc,
467 struct sctp_chunk *chunk)
471 /* If there is an outstanding ASCONF chunk, queue it for later
474 if (asoc->addip_last_asconf) {
475 list_add_tail(&chunk->list, &asoc->addip_chunk_list);
479 /* Hold the chunk until an ASCONF_ACK is received. */
480 sctp_chunk_hold(chunk);
481 retval = sctp_primitive_ASCONF(asoc->base.net, asoc, chunk);
483 sctp_chunk_free(chunk);
485 asoc->addip_last_asconf = chunk;
491 /* Add a list of addresses as bind addresses to local endpoint or
494 * Basically run through each address specified in the addrs/addrcnt
495 * array/length pair, determine if it is IPv6 or IPv4 and call
496 * sctp_do_bind() on it.
498 * If any of them fails, then the operation will be reversed and the
499 * ones that were added will be removed.
501 * Only sctp_setsockopt_bindx() is supposed to call this function.
503 static int sctp_bindx_add(struct sock *sk, struct sockaddr *addrs, int addrcnt)
508 struct sockaddr *sa_addr;
511 pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", __func__, sk,
515 for (cnt = 0; cnt < addrcnt; cnt++) {
516 /* The list may contain either IPv4 or IPv6 address;
517 * determine the address length for walking thru the list.
520 af = sctp_get_af_specific(sa_addr->sa_family);
526 retval = sctp_do_bind(sk, (union sctp_addr *)sa_addr,
529 addr_buf += af->sockaddr_len;
533 /* Failed. Cleanup the ones that have been added */
535 sctp_bindx_rem(sk, addrs, cnt);
543 /* Send an ASCONF chunk with Add IP address parameters to all the peers of the
544 * associations that are part of the endpoint indicating that a list of local
545 * addresses are added to the endpoint.
547 * If any of the addresses is already in the bind address list of the
548 * association, we do not send the chunk for that association. But it will not
549 * affect other associations.
551 * Only sctp_setsockopt_bindx() is supposed to call this function.
553 static int sctp_send_asconf_add_ip(struct sock *sk,
554 struct sockaddr *addrs,
557 struct sctp_sock *sp;
558 struct sctp_endpoint *ep;
559 struct sctp_association *asoc;
560 struct sctp_bind_addr *bp;
561 struct sctp_chunk *chunk;
562 struct sctp_sockaddr_entry *laddr;
563 union sctp_addr *addr;
564 union sctp_addr saveaddr;
574 if (!ep->asconf_enable)
577 pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n",
578 __func__, sk, addrs, addrcnt);
580 list_for_each_entry(asoc, &ep->asocs, asocs) {
581 if (!asoc->peer.asconf_capable)
584 if (asoc->peer.addip_disabled_mask & SCTP_PARAM_ADD_IP)
587 if (!sctp_state(asoc, ESTABLISHED))
590 /* Check if any address in the packed array of addresses is
591 * in the bind address list of the association. If so,
592 * do not send the asconf chunk to its peer, but continue with
593 * other associations.
596 for (i = 0; i < addrcnt; i++) {
598 af = sctp_get_af_specific(addr->v4.sin_family);
604 if (sctp_assoc_lookup_laddr(asoc, addr))
607 addr_buf += af->sockaddr_len;
612 /* Use the first valid address in bind addr list of
613 * association as Address Parameter of ASCONF CHUNK.
615 bp = &asoc->base.bind_addr;
616 p = bp->address_list.next;
617 laddr = list_entry(p, struct sctp_sockaddr_entry, list);
618 chunk = sctp_make_asconf_update_ip(asoc, &laddr->a, addrs,
619 addrcnt, SCTP_PARAM_ADD_IP);
625 /* Add the new addresses to the bind address list with
626 * use_as_src set to 0.
629 for (i = 0; i < addrcnt; i++) {
631 af = sctp_get_af_specific(addr->v4.sin_family);
632 memcpy(&saveaddr, addr, af->sockaddr_len);
633 retval = sctp_add_bind_addr(bp, &saveaddr,
635 SCTP_ADDR_NEW, GFP_ATOMIC);
636 addr_buf += af->sockaddr_len;
638 if (asoc->src_out_of_asoc_ok) {
639 struct sctp_transport *trans;
641 list_for_each_entry(trans,
642 &asoc->peer.transport_addr_list, transports) {
643 trans->cwnd = min(4*asoc->pathmtu, max_t(__u32,
644 2*asoc->pathmtu, 4380));
645 trans->ssthresh = asoc->peer.i.a_rwnd;
646 trans->rto = asoc->rto_initial;
647 sctp_max_rto(asoc, trans);
648 trans->rtt = trans->srtt = trans->rttvar = 0;
649 /* Clear the source and route cache */
650 sctp_transport_route(trans, NULL,
651 sctp_sk(asoc->base.sk));
654 retval = sctp_send_asconf(asoc, chunk);
661 /* Remove a list of addresses from bind addresses list. Do not remove the
664 * Basically run through each address specified in the addrs/addrcnt
665 * array/length pair, determine if it is IPv6 or IPv4 and call
666 * sctp_del_bind() on it.
668 * If any of them fails, then the operation will be reversed and the
669 * ones that were removed will be added back.
671 * At least one address has to be left; if only one address is
672 * available, the operation will return -EBUSY.
674 * Only sctp_setsockopt_bindx() is supposed to call this function.
676 static int sctp_bindx_rem(struct sock *sk, struct sockaddr *addrs, int addrcnt)
678 struct sctp_sock *sp = sctp_sk(sk);
679 struct sctp_endpoint *ep = sp->ep;
681 struct sctp_bind_addr *bp = &ep->base.bind_addr;
684 union sctp_addr *sa_addr;
687 pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n",
688 __func__, sk, addrs, addrcnt);
691 for (cnt = 0; cnt < addrcnt; cnt++) {
692 /* If the bind address list is empty or if there is only one
693 * bind address, there is nothing more to be removed (we need
694 * at least one address here).
696 if (list_empty(&bp->address_list) ||
697 (sctp_list_single_entry(&bp->address_list))) {
703 af = sctp_get_af_specific(sa_addr->sa.sa_family);
709 if (!af->addr_valid(sa_addr, sp, NULL)) {
710 retval = -EADDRNOTAVAIL;
714 if (sa_addr->v4.sin_port &&
715 sa_addr->v4.sin_port != htons(bp->port)) {
720 if (!sa_addr->v4.sin_port)
721 sa_addr->v4.sin_port = htons(bp->port);
723 /* FIXME - There is probably a need to check if sk->sk_saddr and
724 * sk->sk_rcv_addr are currently set to one of the addresses to
725 * be removed. This is something which needs to be looked into
726 * when we are fixing the outstanding issues with multi-homing
727 * socket routing and failover schemes. Refer to comments in
728 * sctp_do_bind(). -daisy
730 retval = sctp_del_bind_addr(bp, sa_addr);
732 addr_buf += af->sockaddr_len;
735 /* Failed. Add the ones that has been removed back */
737 sctp_bindx_add(sk, addrs, cnt);
745 /* Send an ASCONF chunk with Delete IP address parameters to all the peers of
746 * the associations that are part of the endpoint indicating that a list of
747 * local addresses are removed from the endpoint.
749 * If any of the addresses is already in the bind address list of the
750 * association, we do not send the chunk for that association. But it will not
751 * affect other associations.
753 * Only sctp_setsockopt_bindx() is supposed to call this function.
755 static int sctp_send_asconf_del_ip(struct sock *sk,
756 struct sockaddr *addrs,
759 struct sctp_sock *sp;
760 struct sctp_endpoint *ep;
761 struct sctp_association *asoc;
762 struct sctp_transport *transport;
763 struct sctp_bind_addr *bp;
764 struct sctp_chunk *chunk;
765 union sctp_addr *laddr;
768 struct sctp_sockaddr_entry *saddr;
777 if (!ep->asconf_enable)
780 pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n",
781 __func__, sk, addrs, addrcnt);
783 list_for_each_entry(asoc, &ep->asocs, asocs) {
785 if (!asoc->peer.asconf_capable)
788 if (asoc->peer.addip_disabled_mask & SCTP_PARAM_DEL_IP)
791 if (!sctp_state(asoc, ESTABLISHED))
794 /* Check if any address in the packed array of addresses is
795 * not present in the bind address list of the association.
796 * If so, do not send the asconf chunk to its peer, but
797 * continue with other associations.
800 for (i = 0; i < addrcnt; i++) {
802 af = sctp_get_af_specific(laddr->v4.sin_family);
808 if (!sctp_assoc_lookup_laddr(asoc, laddr))
811 addr_buf += af->sockaddr_len;
816 /* Find one address in the association's bind address list
817 * that is not in the packed array of addresses. This is to
818 * make sure that we do not delete all the addresses in the
821 bp = &asoc->base.bind_addr;
822 laddr = sctp_find_unmatch_addr(bp, (union sctp_addr *)addrs,
824 if ((laddr == NULL) && (addrcnt == 1)) {
825 if (asoc->asconf_addr_del_pending)
827 asoc->asconf_addr_del_pending =
828 kzalloc(sizeof(union sctp_addr), GFP_ATOMIC);
829 if (asoc->asconf_addr_del_pending == NULL) {
833 asoc->asconf_addr_del_pending->sa.sa_family =
835 asoc->asconf_addr_del_pending->v4.sin_port =
837 if (addrs->sa_family == AF_INET) {
838 struct sockaddr_in *sin;
840 sin = (struct sockaddr_in *)addrs;
841 asoc->asconf_addr_del_pending->v4.sin_addr.s_addr = sin->sin_addr.s_addr;
842 } else if (addrs->sa_family == AF_INET6) {
843 struct sockaddr_in6 *sin6;
845 sin6 = (struct sockaddr_in6 *)addrs;
846 asoc->asconf_addr_del_pending->v6.sin6_addr = sin6->sin6_addr;
849 pr_debug("%s: keep the last address asoc:%p %pISc at %p\n",
850 __func__, asoc, &asoc->asconf_addr_del_pending->sa,
851 asoc->asconf_addr_del_pending);
853 asoc->src_out_of_asoc_ok = 1;
861 /* We do not need RCU protection throughout this loop
862 * because this is done under a socket lock from the
865 chunk = sctp_make_asconf_update_ip(asoc, laddr, addrs, addrcnt,
873 /* Reset use_as_src flag for the addresses in the bind address
874 * list that are to be deleted.
877 for (i = 0; i < addrcnt; i++) {
879 af = sctp_get_af_specific(laddr->v4.sin_family);
880 list_for_each_entry(saddr, &bp->address_list, list) {
881 if (sctp_cmp_addr_exact(&saddr->a, laddr))
882 saddr->state = SCTP_ADDR_DEL;
884 addr_buf += af->sockaddr_len;
887 /* Update the route and saddr entries for all the transports
888 * as some of the addresses in the bind address list are
889 * about to be deleted and cannot be used as source addresses.
891 list_for_each_entry(transport, &asoc->peer.transport_addr_list,
893 sctp_transport_route(transport, NULL,
894 sctp_sk(asoc->base.sk));
898 /* We don't need to transmit ASCONF */
900 retval = sctp_send_asconf(asoc, chunk);
906 /* set addr events to assocs in the endpoint. ep and addr_wq must be locked */
907 int sctp_asconf_mgmt(struct sctp_sock *sp, struct sctp_sockaddr_entry *addrw)
909 struct sock *sk = sctp_opt2sk(sp);
910 union sctp_addr *addr;
913 /* It is safe to write port space in caller. */
915 addr->v4.sin_port = htons(sp->ep->base.bind_addr.port);
916 af = sctp_get_af_specific(addr->sa.sa_family);
919 if (sctp_verify_addr(sk, addr, af->sockaddr_len))
922 if (addrw->state == SCTP_ADDR_NEW)
923 return sctp_send_asconf_add_ip(sk, (struct sockaddr *)addr, 1);
925 return sctp_send_asconf_del_ip(sk, (struct sockaddr *)addr, 1);
928 /* Helper for tunneling sctp_bindx() requests through sctp_setsockopt()
931 * int sctp_bindx(int sd, struct sockaddr *addrs, int addrcnt,
934 * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses.
935 * If the sd is an IPv6 socket, the addresses passed can either be IPv4
938 * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see
939 * Section 3.1.2 for this usage.
941 * addrs is a pointer to an array of one or more socket addresses. Each
942 * address is contained in its appropriate structure (i.e. struct
943 * sockaddr_in or struct sockaddr_in6) the family of the address type
944 * must be used to distinguish the address length (note that this
945 * representation is termed a "packed array" of addresses). The caller
946 * specifies the number of addresses in the array with addrcnt.
948 * On success, sctp_bindx() returns 0. On failure, sctp_bindx() returns
949 * -1, and sets errno to the appropriate error code.
951 * For SCTP, the port given in each socket address must be the same, or
952 * sctp_bindx() will fail, setting errno to EINVAL.
954 * The flags parameter is formed from the bitwise OR of zero or more of
955 * the following currently defined flags:
957 * SCTP_BINDX_ADD_ADDR
959 * SCTP_BINDX_REM_ADDR
961 * SCTP_BINDX_ADD_ADDR directs SCTP to add the given addresses to the
962 * association, and SCTP_BINDX_REM_ADDR directs SCTP to remove the given
963 * addresses from the association. The two flags are mutually exclusive;
964 * if both are given, sctp_bindx() will fail with EINVAL. A caller may
965 * not remove all addresses from an association; sctp_bindx() will
966 * reject such an attempt with EINVAL.
968 * An application can use sctp_bindx(SCTP_BINDX_ADD_ADDR) to associate
969 * additional addresses with an endpoint after calling bind(). Or use
970 * sctp_bindx(SCTP_BINDX_REM_ADDR) to remove some addresses a listening
971 * socket is associated with so that no new association accepted will be
972 * associated with those addresses. If the endpoint supports dynamic
973 * address a SCTP_BINDX_REM_ADDR or SCTP_BINDX_ADD_ADDR may cause a
974 * endpoint to send the appropriate message to the peer to change the
975 * peers address lists.
977 * Adding and removing addresses from a connected association is
978 * optional functionality. Implementations that do not support this
979 * functionality should return EOPNOTSUPP.
981 * Basically do nothing but copying the addresses from user to kernel
982 * land and invoking either sctp_bindx_add() or sctp_bindx_rem() on the sk.
983 * This is used for tunneling the sctp_bindx() request through sctp_setsockopt()
986 * On exit there is no need to do sockfd_put(), sys_setsockopt() does
989 * sk The sk of the socket
990 * addrs The pointer to the addresses
991 * addrssize Size of the addrs buffer
992 * op Operation to perform (add or remove, see the flags of
995 * Returns 0 if ok, <0 errno code on error.
997 static int sctp_setsockopt_bindx(struct sock *sk, struct sockaddr *addrs,
998 int addrs_size, int op)
1003 struct sockaddr *sa_addr;
1004 void *addr_buf = addrs;
1007 pr_debug("%s: sk:%p addrs:%p addrs_size:%d opt:%d\n",
1008 __func__, sk, addr_buf, addrs_size, op);
1010 if (unlikely(addrs_size <= 0))
1013 /* Walk through the addrs buffer and count the number of addresses. */
1014 while (walk_size < addrs_size) {
1015 if (walk_size + sizeof(sa_family_t) > addrs_size)
1019 af = sctp_get_af_specific(sa_addr->sa_family);
1021 /* If the address family is not supported or if this address
1022 * causes the address buffer to overflow return EINVAL.
1024 if (!af || (walk_size + af->sockaddr_len) > addrs_size)
1027 addr_buf += af->sockaddr_len;
1028 walk_size += af->sockaddr_len;
1033 case SCTP_BINDX_ADD_ADDR:
1034 /* Allow security module to validate bindx addresses. */
1035 err = security_sctp_bind_connect(sk, SCTP_SOCKOPT_BINDX_ADD,
1039 err = sctp_bindx_add(sk, addrs, addrcnt);
1042 return sctp_send_asconf_add_ip(sk, addrs, addrcnt);
1043 case SCTP_BINDX_REM_ADDR:
1044 err = sctp_bindx_rem(sk, addrs, addrcnt);
1047 return sctp_send_asconf_del_ip(sk, addrs, addrcnt);
1054 static int sctp_bind_add(struct sock *sk, struct sockaddr *addrs,
1060 err = sctp_setsockopt_bindx(sk, addrs, addrlen, SCTP_BINDX_ADD_ADDR);
1065 static int sctp_connect_new_asoc(struct sctp_endpoint *ep,
1066 const union sctp_addr *daddr,
1067 const struct sctp_initmsg *init,
1068 struct sctp_transport **tp)
1070 struct sctp_association *asoc;
1071 struct sock *sk = ep->base.sk;
1072 struct net *net = sock_net(sk);
1073 enum sctp_scope scope;
1076 if (sctp_endpoint_is_peeled_off(ep, daddr))
1077 return -EADDRNOTAVAIL;
1079 if (!ep->base.bind_addr.port) {
1080 if (sctp_autobind(sk))
1083 if (inet_port_requires_bind_service(net, ep->base.bind_addr.port) &&
1084 !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
1088 scope = sctp_scope(daddr);
1089 asoc = sctp_association_new(ep, sk, scope, GFP_KERNEL);
1093 err = sctp_assoc_set_bind_addr_from_ep(asoc, scope, GFP_KERNEL);
1097 *tp = sctp_assoc_add_peer(asoc, daddr, GFP_KERNEL, SCTP_UNKNOWN);
1106 if (init->sinit_num_ostreams) {
1107 __u16 outcnt = init->sinit_num_ostreams;
1109 asoc->c.sinit_num_ostreams = outcnt;
1110 /* outcnt has been changed, need to re-init stream */
1111 err = sctp_stream_init(&asoc->stream, outcnt, 0, GFP_KERNEL);
1116 if (init->sinit_max_instreams)
1117 asoc->c.sinit_max_instreams = init->sinit_max_instreams;
1119 if (init->sinit_max_attempts)
1120 asoc->max_init_attempts = init->sinit_max_attempts;
1122 if (init->sinit_max_init_timeo)
1123 asoc->max_init_timeo =
1124 msecs_to_jiffies(init->sinit_max_init_timeo);
1128 sctp_association_free(asoc);
1132 static int sctp_connect_add_peer(struct sctp_association *asoc,
1133 union sctp_addr *daddr, int addr_len)
1135 struct sctp_endpoint *ep = asoc->ep;
1136 struct sctp_association *old;
1137 struct sctp_transport *t;
1140 err = sctp_verify_addr(ep->base.sk, daddr, addr_len);
1144 old = sctp_endpoint_lookup_assoc(ep, daddr, &t);
1145 if (old && old != asoc)
1146 return old->state >= SCTP_STATE_ESTABLISHED ? -EISCONN
1149 if (sctp_endpoint_is_peeled_off(ep, daddr))
1150 return -EADDRNOTAVAIL;
1152 t = sctp_assoc_add_peer(asoc, daddr, GFP_KERNEL, SCTP_UNKNOWN);
1159 /* __sctp_connect(struct sock* sk, struct sockaddr *kaddrs, int addrs_size)
1161 * Common routine for handling connect() and sctp_connectx().
1162 * Connect will come in with just a single address.
1164 static int __sctp_connect(struct sock *sk, struct sockaddr *kaddrs,
1165 int addrs_size, int flags, sctp_assoc_t *assoc_id)
1167 struct sctp_sock *sp = sctp_sk(sk);
1168 struct sctp_endpoint *ep = sp->ep;
1169 struct sctp_transport *transport;
1170 struct sctp_association *asoc;
1171 void *addr_buf = kaddrs;
1172 union sctp_addr *daddr;
1177 if (sctp_sstate(sk, ESTABLISHED) || sctp_sstate(sk, CLOSING) ||
1178 (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING)))
1182 af = sctp_get_af_specific(daddr->sa.sa_family);
1183 if (!af || af->sockaddr_len > addrs_size)
1186 err = sctp_verify_addr(sk, daddr, af->sockaddr_len);
1190 asoc = sctp_endpoint_lookup_assoc(ep, daddr, &transport);
1192 return asoc->state >= SCTP_STATE_ESTABLISHED ? -EISCONN
1195 err = sctp_connect_new_asoc(ep, daddr, NULL, &transport);
1198 asoc = transport->asoc;
1200 addr_buf += af->sockaddr_len;
1201 walk_size = af->sockaddr_len;
1202 while (walk_size < addrs_size) {
1204 if (walk_size + sizeof(sa_family_t) > addrs_size)
1208 af = sctp_get_af_specific(daddr->sa.sa_family);
1209 if (!af || af->sockaddr_len + walk_size > addrs_size)
1212 if (asoc->peer.port != ntohs(daddr->v4.sin_port))
1215 err = sctp_connect_add_peer(asoc, daddr, af->sockaddr_len);
1219 addr_buf += af->sockaddr_len;
1220 walk_size += af->sockaddr_len;
1223 /* In case the user of sctp_connectx() wants an association
1224 * id back, assign one now.
1227 err = sctp_assoc_set_id(asoc, GFP_KERNEL);
1232 err = sctp_primitive_ASSOCIATE(sock_net(sk), asoc, NULL);
1236 /* Initialize sk's dport and daddr for getpeername() */
1237 inet_sk(sk)->inet_dport = htons(asoc->peer.port);
1238 sp->pf->to_sk_daddr(daddr, sk);
1242 *assoc_id = asoc->assoc_id;
1244 timeo = sock_sndtimeo(sk, flags & O_NONBLOCK);
1245 return sctp_wait_for_connect(asoc, &timeo);
1248 pr_debug("%s: took out_free path with asoc:%p kaddrs:%p err:%d\n",
1249 __func__, asoc, kaddrs, err);
1250 sctp_association_free(asoc);
1254 /* Helper for tunneling sctp_connectx() requests through sctp_setsockopt()
1257 * int sctp_connectx(int sd, struct sockaddr *addrs, int addrcnt,
1258 * sctp_assoc_t *asoc);
1260 * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses.
1261 * If the sd is an IPv6 socket, the addresses passed can either be IPv4
1262 * or IPv6 addresses.
1264 * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see
1265 * Section 3.1.2 for this usage.
1267 * addrs is a pointer to an array of one or more socket addresses. Each
1268 * address is contained in its appropriate structure (i.e. struct
1269 * sockaddr_in or struct sockaddr_in6) the family of the address type
1270 * must be used to distengish the address length (note that this
1271 * representation is termed a "packed array" of addresses). The caller
1272 * specifies the number of addresses in the array with addrcnt.
1274 * On success, sctp_connectx() returns 0. It also sets the assoc_id to
1275 * the association id of the new association. On failure, sctp_connectx()
1276 * returns -1, and sets errno to the appropriate error code. The assoc_id
1277 * is not touched by the kernel.
1279 * For SCTP, the port given in each socket address must be the same, or
1280 * sctp_connectx() will fail, setting errno to EINVAL.
1282 * An application can use sctp_connectx to initiate an association with
1283 * an endpoint that is multi-homed. Much like sctp_bindx() this call
1284 * allows a caller to specify multiple addresses at which a peer can be
1285 * reached. The way the SCTP stack uses the list of addresses to set up
1286 * the association is implementation dependent. This function only
1287 * specifies that the stack will try to make use of all the addresses in
1288 * the list when needed.
1290 * Note that the list of addresses passed in is only used for setting up
1291 * the association. It does not necessarily equal the set of addresses
1292 * the peer uses for the resulting association. If the caller wants to
1293 * find out the set of peer addresses, it must use sctp_getpaddrs() to
1294 * retrieve them after the association has been set up.
1296 * Basically do nothing but copying the addresses from user to kernel
1297 * land and invoking either sctp_connectx(). This is used for tunneling
1298 * the sctp_connectx() request through sctp_setsockopt() from userspace.
1300 * On exit there is no need to do sockfd_put(), sys_setsockopt() does
1303 * sk The sk of the socket
1304 * addrs The pointer to the addresses
1305 * addrssize Size of the addrs buffer
1307 * Returns >=0 if ok, <0 errno code on error.
1309 static int __sctp_setsockopt_connectx(struct sock *sk, struct sockaddr *kaddrs,
1310 int addrs_size, sctp_assoc_t *assoc_id)
1312 int err = 0, flags = 0;
1314 pr_debug("%s: sk:%p addrs:%p addrs_size:%d\n",
1315 __func__, sk, kaddrs, addrs_size);
1317 /* make sure the 1st addr's sa_family is accessible later */
1318 if (unlikely(addrs_size < sizeof(sa_family_t)))
1321 /* Allow security module to validate connectx addresses. */
1322 err = security_sctp_bind_connect(sk, SCTP_SOCKOPT_CONNECTX,
1323 (struct sockaddr *)kaddrs,
1328 /* in-kernel sockets don't generally have a file allocated to them
1329 * if all they do is call sock_create_kern().
1331 if (sk->sk_socket->file)
1332 flags = sk->sk_socket->file->f_flags;
1334 return __sctp_connect(sk, kaddrs, addrs_size, flags, assoc_id);
1338 * This is an older interface. It's kept for backward compatibility
1339 * to the option that doesn't provide association id.
1341 static int sctp_setsockopt_connectx_old(struct sock *sk,
1342 struct sockaddr *kaddrs,
1345 return __sctp_setsockopt_connectx(sk, kaddrs, addrs_size, NULL);
1349 * New interface for the API. The since the API is done with a socket
1350 * option, to make it simple we feed back the association id is as a return
1351 * indication to the call. Error is always negative and association id is
1354 static int sctp_setsockopt_connectx(struct sock *sk,
1355 struct sockaddr *kaddrs,
1358 sctp_assoc_t assoc_id = 0;
1361 err = __sctp_setsockopt_connectx(sk, kaddrs, addrs_size, &assoc_id);
1370 * New (hopefully final) interface for the API.
1371 * We use the sctp_getaddrs_old structure so that use-space library
1372 * can avoid any unnecessary allocations. The only different part
1373 * is that we store the actual length of the address buffer into the
1374 * addrs_num structure member. That way we can re-use the existing
1377 #ifdef CONFIG_COMPAT
1378 struct compat_sctp_getaddrs_old {
1379 sctp_assoc_t assoc_id;
1381 compat_uptr_t addrs; /* struct sockaddr * */
1385 static int sctp_getsockopt_connectx3(struct sock *sk, int len,
1386 char __user *optval,
1389 struct sctp_getaddrs_old param;
1390 sctp_assoc_t assoc_id = 0;
1391 struct sockaddr *kaddrs;
1394 #ifdef CONFIG_COMPAT
1395 if (in_compat_syscall()) {
1396 struct compat_sctp_getaddrs_old param32;
1398 if (len < sizeof(param32))
1400 if (copy_from_user(¶m32, optval, sizeof(param32)))
1403 param.assoc_id = param32.assoc_id;
1404 param.addr_num = param32.addr_num;
1405 param.addrs = compat_ptr(param32.addrs);
1409 if (len < sizeof(param))
1411 if (copy_from_user(¶m, optval, sizeof(param)))
1415 kaddrs = memdup_user(param.addrs, param.addr_num);
1417 return PTR_ERR(kaddrs);
1419 err = __sctp_setsockopt_connectx(sk, kaddrs, param.addr_num, &assoc_id);
1421 if (err == 0 || err == -EINPROGRESS) {
1422 if (copy_to_user(optval, &assoc_id, sizeof(assoc_id)))
1424 if (put_user(sizeof(assoc_id), optlen))
1431 /* API 3.1.4 close() - UDP Style Syntax
1432 * Applications use close() to perform graceful shutdown (as described in
1433 * Section 10.1 of [SCTP]) on ALL the associations currently represented
1434 * by a UDP-style socket.
1438 * ret = close(int sd);
1440 * sd - the socket descriptor of the associations to be closed.
1442 * To gracefully shutdown a specific association represented by the
1443 * UDP-style socket, an application should use the sendmsg() call,
1444 * passing no user data, but including the appropriate flag in the
1445 * ancillary data (see Section xxxx).
1447 * If sd in the close() call is a branched-off socket representing only
1448 * one association, the shutdown is performed on that association only.
1450 * 4.1.6 close() - TCP Style Syntax
1452 * Applications use close() to gracefully close down an association.
1456 * int close(int sd);
1458 * sd - the socket descriptor of the association to be closed.
1460 * After an application calls close() on a socket descriptor, no further
1461 * socket operations will succeed on that descriptor.
1463 * API 7.1.4 SO_LINGER
1465 * An application using the TCP-style socket can use this option to
1466 * perform the SCTP ABORT primitive. The linger option structure is:
1469 * int l_onoff; // option on/off
1470 * int l_linger; // linger time
1473 * To enable the option, set l_onoff to 1. If the l_linger value is set
1474 * to 0, calling close() is the same as the ABORT primitive. If the
1475 * value is set to a negative value, the setsockopt() call will return
1476 * an error. If the value is set to a positive value linger_time, the
1477 * close() can be blocked for at most linger_time ms. If the graceful
1478 * shutdown phase does not finish during this period, close() will
1479 * return but the graceful shutdown phase continues in the system.
1481 static void sctp_close(struct sock *sk, long timeout)
1483 struct net *net = sock_net(sk);
1484 struct sctp_endpoint *ep;
1485 struct sctp_association *asoc;
1486 struct list_head *pos, *temp;
1487 unsigned int data_was_unread;
1489 pr_debug("%s: sk:%p, timeout:%ld\n", __func__, sk, timeout);
1491 lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
1492 sk->sk_shutdown = SHUTDOWN_MASK;
1493 inet_sk_set_state(sk, SCTP_SS_CLOSING);
1495 ep = sctp_sk(sk)->ep;
1497 /* Clean up any skbs sitting on the receive queue. */
1498 data_was_unread = sctp_queue_purge_ulpevents(&sk->sk_receive_queue);
1499 data_was_unread += sctp_queue_purge_ulpevents(&sctp_sk(sk)->pd_lobby);
1501 /* Walk all associations on an endpoint. */
1502 list_for_each_safe(pos, temp, &ep->asocs) {
1503 asoc = list_entry(pos, struct sctp_association, asocs);
1505 if (sctp_style(sk, TCP)) {
1506 /* A closed association can still be in the list if
1507 * it belongs to a TCP-style listening socket that is
1508 * not yet accepted. If so, free it. If not, send an
1509 * ABORT or SHUTDOWN based on the linger options.
1511 if (sctp_state(asoc, CLOSED)) {
1512 sctp_association_free(asoc);
1517 if (data_was_unread || !skb_queue_empty(&asoc->ulpq.lobby) ||
1518 !skb_queue_empty(&asoc->ulpq.reasm) ||
1519 !skb_queue_empty(&asoc->ulpq.reasm_uo) ||
1520 (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime)) {
1521 struct sctp_chunk *chunk;
1523 chunk = sctp_make_abort_user(asoc, NULL, 0);
1524 sctp_primitive_ABORT(net, asoc, chunk);
1526 sctp_primitive_SHUTDOWN(net, asoc, NULL);
1529 /* On a TCP-style socket, block for at most linger_time if set. */
1530 if (sctp_style(sk, TCP) && timeout)
1531 sctp_wait_for_close(sk, timeout);
1533 /* This will run the backlog queue. */
1536 /* Supposedly, no process has access to the socket, but
1537 * the net layers still may.
1538 * Also, sctp_destroy_sock() needs to be called with addr_wq_lock
1539 * held and that should be grabbed before socket lock.
1541 spin_lock_bh(&net->sctp.addr_wq_lock);
1542 bh_lock_sock_nested(sk);
1544 /* Hold the sock, since sk_common_release() will put sock_put()
1545 * and we have just a little more cleanup.
1548 sk_common_release(sk);
1551 spin_unlock_bh(&net->sctp.addr_wq_lock);
1555 SCTP_DBG_OBJCNT_DEC(sock);
1558 /* Handle EPIPE error. */
1559 static int sctp_error(struct sock *sk, int flags, int err)
1562 err = sock_error(sk) ? : -EPIPE;
1563 if (err == -EPIPE && !(flags & MSG_NOSIGNAL))
1564 send_sig(SIGPIPE, current, 0);
1568 /* API 3.1.3 sendmsg() - UDP Style Syntax
1570 * An application uses sendmsg() and recvmsg() calls to transmit data to
1571 * and receive data from its peer.
1573 * ssize_t sendmsg(int socket, const struct msghdr *message,
1576 * socket - the socket descriptor of the endpoint.
1577 * message - pointer to the msghdr structure which contains a single
1578 * user message and possibly some ancillary data.
1580 * See Section 5 for complete description of the data
1583 * flags - flags sent or received with the user message, see Section
1584 * 5 for complete description of the flags.
1586 * Note: This function could use a rewrite especially when explicit
1587 * connect support comes in.
1589 /* BUG: We do not implement the equivalent of sk_stream_wait_memory(). */
1591 static int sctp_msghdr_parse(const struct msghdr *msg,
1592 struct sctp_cmsgs *cmsgs);
1594 static int sctp_sendmsg_parse(struct sock *sk, struct sctp_cmsgs *cmsgs,
1595 struct sctp_sndrcvinfo *srinfo,
1596 const struct msghdr *msg, size_t msg_len)
1601 if (sctp_sstate(sk, LISTENING) && sctp_style(sk, TCP))
1604 if (msg_len > sk->sk_sndbuf)
1607 memset(cmsgs, 0, sizeof(*cmsgs));
1608 err = sctp_msghdr_parse(msg, cmsgs);
1610 pr_debug("%s: msghdr parse err:%x\n", __func__, err);
1614 memset(srinfo, 0, sizeof(*srinfo));
1615 if (cmsgs->srinfo) {
1616 srinfo->sinfo_stream = cmsgs->srinfo->sinfo_stream;
1617 srinfo->sinfo_flags = cmsgs->srinfo->sinfo_flags;
1618 srinfo->sinfo_ppid = cmsgs->srinfo->sinfo_ppid;
1619 srinfo->sinfo_context = cmsgs->srinfo->sinfo_context;
1620 srinfo->sinfo_assoc_id = cmsgs->srinfo->sinfo_assoc_id;
1621 srinfo->sinfo_timetolive = cmsgs->srinfo->sinfo_timetolive;
1625 srinfo->sinfo_stream = cmsgs->sinfo->snd_sid;
1626 srinfo->sinfo_flags = cmsgs->sinfo->snd_flags;
1627 srinfo->sinfo_ppid = cmsgs->sinfo->snd_ppid;
1628 srinfo->sinfo_context = cmsgs->sinfo->snd_context;
1629 srinfo->sinfo_assoc_id = cmsgs->sinfo->snd_assoc_id;
1632 if (cmsgs->prinfo) {
1633 srinfo->sinfo_timetolive = cmsgs->prinfo->pr_value;
1634 SCTP_PR_SET_POLICY(srinfo->sinfo_flags,
1635 cmsgs->prinfo->pr_policy);
1638 sflags = srinfo->sinfo_flags;
1639 if (!sflags && msg_len)
1642 if (sctp_style(sk, TCP) && (sflags & (SCTP_EOF | SCTP_ABORT)))
1645 if (((sflags & SCTP_EOF) && msg_len > 0) ||
1646 (!(sflags & (SCTP_EOF | SCTP_ABORT)) && msg_len == 0))
1649 if ((sflags & SCTP_ADDR_OVER) && !msg->msg_name)
1655 static int sctp_sendmsg_new_asoc(struct sock *sk, __u16 sflags,
1656 struct sctp_cmsgs *cmsgs,
1657 union sctp_addr *daddr,
1658 struct sctp_transport **tp)
1660 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
1661 struct sctp_association *asoc;
1662 struct cmsghdr *cmsg;
1663 __be32 flowinfo = 0;
1669 if (sflags & (SCTP_EOF | SCTP_ABORT))
1672 if (sctp_style(sk, TCP) && (sctp_sstate(sk, ESTABLISHED) ||
1673 sctp_sstate(sk, CLOSING)))
1674 return -EADDRNOTAVAIL;
1676 /* Label connection socket for first association 1-to-many
1677 * style for client sequence socket()->sendmsg(). This
1678 * needs to be done before sctp_assoc_add_peer() as that will
1679 * set up the initial packet that needs to account for any
1680 * security ip options (CIPSO/CALIPSO) added to the packet.
1682 af = sctp_get_af_specific(daddr->sa.sa_family);
1685 err = security_sctp_bind_connect(sk, SCTP_SENDMSG_CONNECT,
1686 (struct sockaddr *)daddr,
1691 err = sctp_connect_new_asoc(ep, daddr, cmsgs->init, tp);
1696 if (!cmsgs->addrs_msg)
1699 if (daddr->sa.sa_family == AF_INET6)
1700 flowinfo = daddr->v6.sin6_flowinfo;
1702 /* sendv addr list parse */
1703 for_each_cmsghdr(cmsg, cmsgs->addrs_msg) {
1704 union sctp_addr _daddr;
1707 if (cmsg->cmsg_level != IPPROTO_SCTP ||
1708 (cmsg->cmsg_type != SCTP_DSTADDRV4 &&
1709 cmsg->cmsg_type != SCTP_DSTADDRV6))
1713 memset(daddr, 0, sizeof(*daddr));
1714 dlen = cmsg->cmsg_len - sizeof(struct cmsghdr);
1715 if (cmsg->cmsg_type == SCTP_DSTADDRV4) {
1716 if (dlen < sizeof(struct in_addr)) {
1721 dlen = sizeof(struct in_addr);
1722 daddr->v4.sin_family = AF_INET;
1723 daddr->v4.sin_port = htons(asoc->peer.port);
1724 memcpy(&daddr->v4.sin_addr, CMSG_DATA(cmsg), dlen);
1726 if (dlen < sizeof(struct in6_addr)) {
1731 dlen = sizeof(struct in6_addr);
1732 daddr->v6.sin6_flowinfo = flowinfo;
1733 daddr->v6.sin6_family = AF_INET6;
1734 daddr->v6.sin6_port = htons(asoc->peer.port);
1735 memcpy(&daddr->v6.sin6_addr, CMSG_DATA(cmsg), dlen);
1738 err = sctp_connect_add_peer(asoc, daddr, sizeof(*daddr));
1746 sctp_association_free(asoc);
1750 static int sctp_sendmsg_check_sflags(struct sctp_association *asoc,
1751 __u16 sflags, struct msghdr *msg,
1754 struct sock *sk = asoc->base.sk;
1755 struct net *net = sock_net(sk);
1757 if (sctp_state(asoc, CLOSED) && sctp_style(sk, TCP))
1760 if ((sflags & SCTP_SENDALL) && sctp_style(sk, UDP) &&
1761 !sctp_state(asoc, ESTABLISHED))
1764 if (sflags & SCTP_EOF) {
1765 pr_debug("%s: shutting down association:%p\n", __func__, asoc);
1766 sctp_primitive_SHUTDOWN(net, asoc, NULL);
1771 if (sflags & SCTP_ABORT) {
1772 struct sctp_chunk *chunk;
1774 chunk = sctp_make_abort_user(asoc, msg, msg_len);
1778 pr_debug("%s: aborting association:%p\n", __func__, asoc);
1779 sctp_primitive_ABORT(net, asoc, chunk);
1780 iov_iter_revert(&msg->msg_iter, msg_len);
1788 static int sctp_sendmsg_to_asoc(struct sctp_association *asoc,
1789 struct msghdr *msg, size_t msg_len,
1790 struct sctp_transport *transport,
1791 struct sctp_sndrcvinfo *sinfo)
1793 struct sock *sk = asoc->base.sk;
1794 struct sctp_sock *sp = sctp_sk(sk);
1795 struct net *net = sock_net(sk);
1796 struct sctp_datamsg *datamsg;
1797 bool wait_connect = false;
1798 struct sctp_chunk *chunk;
1802 if (sinfo->sinfo_stream >= asoc->stream.outcnt) {
1807 if (unlikely(!SCTP_SO(&asoc->stream, sinfo->sinfo_stream)->ext)) {
1808 err = sctp_stream_init_ext(&asoc->stream, sinfo->sinfo_stream);
1813 if (sp->disable_fragments && msg_len > asoc->frag_point) {
1818 if (asoc->pmtu_pending) {
1819 if (sp->param_flags & SPP_PMTUD_ENABLE)
1820 sctp_assoc_sync_pmtu(asoc);
1821 asoc->pmtu_pending = 0;
1824 if (sctp_wspace(asoc) < (int)msg_len)
1825 sctp_prsctp_prune(asoc, sinfo, msg_len - sctp_wspace(asoc));
1827 if (sctp_wspace(asoc) <= 0 || !sk_wmem_schedule(sk, msg_len)) {
1828 timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT);
1829 err = sctp_wait_for_sndbuf(asoc, &timeo, msg_len);
1832 if (unlikely(sinfo->sinfo_stream >= asoc->stream.outcnt)) {
1838 if (sctp_state(asoc, CLOSED)) {
1839 err = sctp_primitive_ASSOCIATE(net, asoc, NULL);
1843 if (asoc->ep->intl_enable) {
1844 timeo = sock_sndtimeo(sk, 0);
1845 err = sctp_wait_for_connect(asoc, &timeo);
1851 wait_connect = true;
1854 pr_debug("%s: we associated primitively\n", __func__);
1857 datamsg = sctp_datamsg_from_user(asoc, sinfo, &msg->msg_iter);
1858 if (IS_ERR(datamsg)) {
1859 err = PTR_ERR(datamsg);
1863 asoc->force_delay = !!(msg->msg_flags & MSG_MORE);
1865 list_for_each_entry(chunk, &datamsg->chunks, frag_list) {
1866 sctp_chunk_hold(chunk);
1867 sctp_set_owner_w(chunk);
1868 chunk->transport = transport;
1871 err = sctp_primitive_SEND(net, asoc, datamsg);
1873 sctp_datamsg_free(datamsg);
1877 pr_debug("%s: we sent primitively\n", __func__);
1879 sctp_datamsg_put(datamsg);
1881 if (unlikely(wait_connect)) {
1882 timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT);
1883 sctp_wait_for_connect(asoc, &timeo);
1892 static union sctp_addr *sctp_sendmsg_get_daddr(struct sock *sk,
1893 const struct msghdr *msg,
1894 struct sctp_cmsgs *cmsgs)
1896 union sctp_addr *daddr = NULL;
1899 if (!sctp_style(sk, UDP_HIGH_BANDWIDTH) && msg->msg_name) {
1900 int len = msg->msg_namelen;
1902 if (len > sizeof(*daddr))
1903 len = sizeof(*daddr);
1905 daddr = (union sctp_addr *)msg->msg_name;
1907 err = sctp_verify_addr(sk, daddr, len);
1909 return ERR_PTR(err);
1915 static void sctp_sendmsg_update_sinfo(struct sctp_association *asoc,
1916 struct sctp_sndrcvinfo *sinfo,
1917 struct sctp_cmsgs *cmsgs)
1919 if (!cmsgs->srinfo && !cmsgs->sinfo) {
1920 sinfo->sinfo_stream = asoc->default_stream;
1921 sinfo->sinfo_ppid = asoc->default_ppid;
1922 sinfo->sinfo_context = asoc->default_context;
1923 sinfo->sinfo_assoc_id = sctp_assoc2id(asoc);
1926 sinfo->sinfo_flags = asoc->default_flags;
1929 if (!cmsgs->srinfo && !cmsgs->prinfo)
1930 sinfo->sinfo_timetolive = asoc->default_timetolive;
1932 if (cmsgs->authinfo) {
1933 /* Reuse sinfo_tsn to indicate that authinfo was set and
1934 * sinfo_ssn to save the keyid on tx path.
1936 sinfo->sinfo_tsn = 1;
1937 sinfo->sinfo_ssn = cmsgs->authinfo->auth_keynumber;
1941 static int sctp_sendmsg(struct sock *sk, struct msghdr *msg, size_t msg_len)
1943 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
1944 struct sctp_transport *transport = NULL;
1945 struct sctp_sndrcvinfo _sinfo, *sinfo;
1946 struct sctp_association *asoc, *tmp;
1947 struct sctp_cmsgs cmsgs;
1948 union sctp_addr *daddr;
1953 /* Parse and get snd_info */
1954 err = sctp_sendmsg_parse(sk, &cmsgs, &_sinfo, msg, msg_len);
1959 sflags = sinfo->sinfo_flags;
1961 /* Get daddr from msg */
1962 daddr = sctp_sendmsg_get_daddr(sk, msg, &cmsgs);
1963 if (IS_ERR(daddr)) {
1964 err = PTR_ERR(daddr);
1970 /* SCTP_SENDALL process */
1971 if ((sflags & SCTP_SENDALL) && sctp_style(sk, UDP)) {
1972 list_for_each_entry_safe(asoc, tmp, &ep->asocs, asocs) {
1973 err = sctp_sendmsg_check_sflags(asoc, sflags, msg,
1980 sctp_sendmsg_update_sinfo(asoc, sinfo, &cmsgs);
1982 err = sctp_sendmsg_to_asoc(asoc, msg, msg_len,
1987 iov_iter_revert(&msg->msg_iter, err);
1993 /* Get and check or create asoc */
1995 asoc = sctp_endpoint_lookup_assoc(ep, daddr, &transport);
1997 err = sctp_sendmsg_check_sflags(asoc, sflags, msg,
2002 err = sctp_sendmsg_new_asoc(sk, sflags, &cmsgs, daddr,
2007 asoc = transport->asoc;
2011 if (!sctp_style(sk, TCP) && !(sflags & SCTP_ADDR_OVER))
2014 asoc = sctp_id2assoc(sk, sinfo->sinfo_assoc_id);
2020 err = sctp_sendmsg_check_sflags(asoc, sflags, msg, msg_len);
2025 /* Update snd_info with the asoc */
2026 sctp_sendmsg_update_sinfo(asoc, sinfo, &cmsgs);
2028 /* Send msg to the asoc */
2029 err = sctp_sendmsg_to_asoc(asoc, msg, msg_len, transport, sinfo);
2030 if (err < 0 && err != -ESRCH && new)
2031 sctp_association_free(asoc);
2036 return sctp_error(sk, msg->msg_flags, err);
2039 /* This is an extended version of skb_pull() that removes the data from the
2040 * start of a skb even when data is spread across the list of skb's in the
2041 * frag_list. len specifies the total amount of data that needs to be removed.
2042 * when 'len' bytes could be removed from the skb, it returns 0.
2043 * If 'len' exceeds the total skb length, it returns the no. of bytes that
2044 * could not be removed.
2046 static int sctp_skb_pull(struct sk_buff *skb, int len)
2048 struct sk_buff *list;
2049 int skb_len = skb_headlen(skb);
2052 if (len <= skb_len) {
2053 __skb_pull(skb, len);
2057 __skb_pull(skb, skb_len);
2059 skb_walk_frags(skb, list) {
2060 rlen = sctp_skb_pull(list, len);
2061 skb->len -= (len-rlen);
2062 skb->data_len -= (len-rlen);
2073 /* API 3.1.3 recvmsg() - UDP Style Syntax
2075 * ssize_t recvmsg(int socket, struct msghdr *message,
2078 * socket - the socket descriptor of the endpoint.
2079 * message - pointer to the msghdr structure which contains a single
2080 * user message and possibly some ancillary data.
2082 * See Section 5 for complete description of the data
2085 * flags - flags sent or received with the user message, see Section
2086 * 5 for complete description of the flags.
2088 static int sctp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
2089 int flags, int *addr_len)
2091 struct sctp_ulpevent *event = NULL;
2092 struct sctp_sock *sp = sctp_sk(sk);
2093 struct sk_buff *skb, *head_skb;
2098 pr_debug("%s: sk:%p, msghdr:%p, len:%zd, flags:0x%x, addr_len:%p)\n",
2099 __func__, sk, msg, len, flags, addr_len);
2101 if (unlikely(flags & MSG_ERRQUEUE))
2102 return inet_recv_error(sk, msg, len, addr_len);
2104 if (sk_can_busy_loop(sk) &&
2105 skb_queue_empty_lockless(&sk->sk_receive_queue))
2106 sk_busy_loop(sk, flags & MSG_DONTWAIT);
2110 if (sctp_style(sk, TCP) && !sctp_sstate(sk, ESTABLISHED) &&
2111 !sctp_sstate(sk, CLOSING) && !sctp_sstate(sk, CLOSED)) {
2116 skb = sctp_skb_recv_datagram(sk, flags, &err);
2120 /* Get the total length of the skb including any skb's in the
2129 err = skb_copy_datagram_msg(skb, 0, msg, copied);
2131 event = sctp_skb2event(skb);
2136 if (event->chunk && event->chunk->head_skb)
2137 head_skb = event->chunk->head_skb;
2140 sock_recv_cmsgs(msg, sk, head_skb);
2141 if (sctp_ulpevent_is_notification(event)) {
2142 msg->msg_flags |= MSG_NOTIFICATION;
2143 sp->pf->event_msgname(event, msg->msg_name, addr_len);
2145 sp->pf->skb_msgname(head_skb, msg->msg_name, addr_len);
2148 /* Check if we allow SCTP_NXTINFO. */
2149 if (sp->recvnxtinfo)
2150 sctp_ulpevent_read_nxtinfo(event, msg, sk);
2151 /* Check if we allow SCTP_RCVINFO. */
2152 if (sp->recvrcvinfo)
2153 sctp_ulpevent_read_rcvinfo(event, msg);
2154 /* Check if we allow SCTP_SNDRCVINFO. */
2155 if (sctp_ulpevent_type_enabled(sp->subscribe, SCTP_DATA_IO_EVENT))
2156 sctp_ulpevent_read_sndrcvinfo(event, msg);
2160 /* If skb's length exceeds the user's buffer, update the skb and
2161 * push it back to the receive_queue so that the next call to
2162 * recvmsg() will return the remaining data. Don't set MSG_EOR.
2164 if (skb_len > copied) {
2165 msg->msg_flags &= ~MSG_EOR;
2166 if (flags & MSG_PEEK)
2168 sctp_skb_pull(skb, copied);
2169 skb_queue_head(&sk->sk_receive_queue, skb);
2171 /* When only partial message is copied to the user, increase
2172 * rwnd by that amount. If all the data in the skb is read,
2173 * rwnd is updated when the event is freed.
2175 if (!sctp_ulpevent_is_notification(event))
2176 sctp_assoc_rwnd_increase(event->asoc, copied);
2178 } else if ((event->msg_flags & MSG_NOTIFICATION) ||
2179 (event->msg_flags & MSG_EOR))
2180 msg->msg_flags |= MSG_EOR;
2182 msg->msg_flags &= ~MSG_EOR;
2185 if (flags & MSG_PEEK) {
2186 /* Release the skb reference acquired after peeking the skb in
2187 * sctp_skb_recv_datagram().
2191 /* Free the event which includes releasing the reference to
2192 * the owner of the skb, freeing the skb and updating the
2195 sctp_ulpevent_free(event);
2202 /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS)
2204 * This option is a on/off flag. If enabled no SCTP message
2205 * fragmentation will be performed. Instead if a message being sent
2206 * exceeds the current PMTU size, the message will NOT be sent and
2207 * instead a error will be indicated to the user.
2209 static int sctp_setsockopt_disable_fragments(struct sock *sk, int *val,
2210 unsigned int optlen)
2212 if (optlen < sizeof(int))
2214 sctp_sk(sk)->disable_fragments = (*val == 0) ? 0 : 1;
2218 static int sctp_setsockopt_events(struct sock *sk, __u8 *sn_type,
2219 unsigned int optlen)
2221 struct sctp_sock *sp = sctp_sk(sk);
2222 struct sctp_association *asoc;
2225 if (optlen > sizeof(struct sctp_event_subscribe))
2228 for (i = 0; i < optlen; i++)
2229 sctp_ulpevent_type_set(&sp->subscribe, SCTP_SN_TYPE_BASE + i,
2232 list_for_each_entry(asoc, &sp->ep->asocs, asocs)
2233 asoc->subscribe = sctp_sk(sk)->subscribe;
2235 /* At the time when a user app subscribes to SCTP_SENDER_DRY_EVENT,
2236 * if there is no data to be sent or retransmit, the stack will
2237 * immediately send up this notification.
2239 if (sctp_ulpevent_type_enabled(sp->subscribe, SCTP_SENDER_DRY_EVENT)) {
2240 struct sctp_ulpevent *event;
2242 asoc = sctp_id2assoc(sk, 0);
2243 if (asoc && sctp_outq_is_empty(&asoc->outqueue)) {
2244 event = sctp_ulpevent_make_sender_dry_event(asoc,
2245 GFP_USER | __GFP_NOWARN);
2249 asoc->stream.si->enqueue_event(&asoc->ulpq, event);
2256 /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE)
2258 * This socket option is applicable to the UDP-style socket only. When
2259 * set it will cause associations that are idle for more than the
2260 * specified number of seconds to automatically close. An association
2261 * being idle is defined an association that has NOT sent or received
2262 * user data. The special value of '0' indicates that no automatic
2263 * close of any associations should be performed. The option expects an
2264 * integer defining the number of seconds of idle time before an
2265 * association is closed.
2267 static int sctp_setsockopt_autoclose(struct sock *sk, u32 *optval,
2268 unsigned int optlen)
2270 struct sctp_sock *sp = sctp_sk(sk);
2271 struct net *net = sock_net(sk);
2273 /* Applicable to UDP-style socket only */
2274 if (sctp_style(sk, TCP))
2276 if (optlen != sizeof(int))
2279 sp->autoclose = *optval;
2280 if (sp->autoclose > net->sctp.max_autoclose)
2281 sp->autoclose = net->sctp.max_autoclose;
2286 /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS)
2288 * Applications can enable or disable heartbeats for any peer address of
2289 * an association, modify an address's heartbeat interval, force a
2290 * heartbeat to be sent immediately, and adjust the address's maximum
2291 * number of retransmissions sent before an address is considered
2292 * unreachable. The following structure is used to access and modify an
2293 * address's parameters:
2295 * struct sctp_paddrparams {
2296 * sctp_assoc_t spp_assoc_id;
2297 * struct sockaddr_storage spp_address;
2298 * uint32_t spp_hbinterval;
2299 * uint16_t spp_pathmaxrxt;
2300 * uint32_t spp_pathmtu;
2301 * uint32_t spp_sackdelay;
2302 * uint32_t spp_flags;
2303 * uint32_t spp_ipv6_flowlabel;
2307 * spp_assoc_id - (one-to-many style socket) This is filled in the
2308 * application, and identifies the association for
2310 * spp_address - This specifies which address is of interest.
2311 * spp_hbinterval - This contains the value of the heartbeat interval,
2312 * in milliseconds. If a value of zero
2313 * is present in this field then no changes are to
2314 * be made to this parameter.
2315 * spp_pathmaxrxt - This contains the maximum number of
2316 * retransmissions before this address shall be
2317 * considered unreachable. If a value of zero
2318 * is present in this field then no changes are to
2319 * be made to this parameter.
2320 * spp_pathmtu - When Path MTU discovery is disabled the value
2321 * specified here will be the "fixed" path mtu.
2322 * Note that if the spp_address field is empty
2323 * then all associations on this address will
2324 * have this fixed path mtu set upon them.
2326 * spp_sackdelay - When delayed sack is enabled, this value specifies
2327 * the number of milliseconds that sacks will be delayed
2328 * for. This value will apply to all addresses of an
2329 * association if the spp_address field is empty. Note
2330 * also, that if delayed sack is enabled and this
2331 * value is set to 0, no change is made to the last
2332 * recorded delayed sack timer value.
2334 * spp_flags - These flags are used to control various features
2335 * on an association. The flag field may contain
2336 * zero or more of the following options.
2338 * SPP_HB_ENABLE - Enable heartbeats on the
2339 * specified address. Note that if the address
2340 * field is empty all addresses for the association
2341 * have heartbeats enabled upon them.
2343 * SPP_HB_DISABLE - Disable heartbeats on the
2344 * speicifed address. Note that if the address
2345 * field is empty all addresses for the association
2346 * will have their heartbeats disabled. Note also
2347 * that SPP_HB_ENABLE and SPP_HB_DISABLE are
2348 * mutually exclusive, only one of these two should
2349 * be specified. Enabling both fields will have
2350 * undetermined results.
2352 * SPP_HB_DEMAND - Request a user initiated heartbeat
2353 * to be made immediately.
2355 * SPP_HB_TIME_IS_ZERO - Specify's that the time for
2356 * heartbeat delayis to be set to the value of 0
2359 * SPP_PMTUD_ENABLE - This field will enable PMTU
2360 * discovery upon the specified address. Note that
2361 * if the address feild is empty then all addresses
2362 * on the association are effected.
2364 * SPP_PMTUD_DISABLE - This field will disable PMTU
2365 * discovery upon the specified address. Note that
2366 * if the address feild is empty then all addresses
2367 * on the association are effected. Not also that
2368 * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually
2369 * exclusive. Enabling both will have undetermined
2372 * SPP_SACKDELAY_ENABLE - Setting this flag turns
2373 * on delayed sack. The time specified in spp_sackdelay
2374 * is used to specify the sack delay for this address. Note
2375 * that if spp_address is empty then all addresses will
2376 * enable delayed sack and take on the sack delay
2377 * value specified in spp_sackdelay.
2378 * SPP_SACKDELAY_DISABLE - Setting this flag turns
2379 * off delayed sack. If the spp_address field is blank then
2380 * delayed sack is disabled for the entire association. Note
2381 * also that this field is mutually exclusive to
2382 * SPP_SACKDELAY_ENABLE, setting both will have undefined
2385 * SPP_IPV6_FLOWLABEL: Setting this flag enables the
2386 * setting of the IPV6 flow label value. The value is
2387 * contained in the spp_ipv6_flowlabel field.
2388 * Upon retrieval, this flag will be set to indicate that
2389 * the spp_ipv6_flowlabel field has a valid value returned.
2390 * If a specific destination address is set (in the
2391 * spp_address field), then the value returned is that of
2392 * the address. If just an association is specified (and
2393 * no address), then the association's default flow label
2394 * is returned. If neither an association nor a destination
2395 * is specified, then the socket's default flow label is
2396 * returned. For non-IPv6 sockets, this flag will be left
2399 * SPP_DSCP: Setting this flag enables the setting of the
2400 * Differentiated Services Code Point (DSCP) value
2401 * associated with either the association or a specific
2402 * address. The value is obtained in the spp_dscp field.
2403 * Upon retrieval, this flag will be set to indicate that
2404 * the spp_dscp field has a valid value returned. If a
2405 * specific destination address is set when called (in the
2406 * spp_address field), then that specific destination
2407 * address's DSCP value is returned. If just an association
2408 * is specified, then the association's default DSCP is
2409 * returned. If neither an association nor a destination is
2410 * specified, then the socket's default DSCP is returned.
2412 * spp_ipv6_flowlabel
2413 * - This field is used in conjunction with the
2414 * SPP_IPV6_FLOWLABEL flag and contains the IPv6 flow label.
2415 * The 20 least significant bits are used for the flow
2416 * label. This setting has precedence over any IPv6-layer
2419 * spp_dscp - This field is used in conjunction with the SPP_DSCP flag
2420 * and contains the DSCP. The 6 most significant bits are
2421 * used for the DSCP. This setting has precedence over any
2422 * IPv4- or IPv6- layer setting.
2424 static int sctp_apply_peer_addr_params(struct sctp_paddrparams *params,
2425 struct sctp_transport *trans,
2426 struct sctp_association *asoc,
2427 struct sctp_sock *sp,
2430 int sackdelay_change)
2434 if (params->spp_flags & SPP_HB_DEMAND && trans) {
2435 error = sctp_primitive_REQUESTHEARTBEAT(trans->asoc->base.net,
2436 trans->asoc, trans);
2441 /* Note that unless the spp_flag is set to SPP_HB_ENABLE the value of
2442 * this field is ignored. Note also that a value of zero indicates
2443 * the current setting should be left unchanged.
2445 if (params->spp_flags & SPP_HB_ENABLE) {
2447 /* Re-zero the interval if the SPP_HB_TIME_IS_ZERO is
2448 * set. This lets us use 0 value when this flag
2451 if (params->spp_flags & SPP_HB_TIME_IS_ZERO)
2452 params->spp_hbinterval = 0;
2454 if (params->spp_hbinterval ||
2455 (params->spp_flags & SPP_HB_TIME_IS_ZERO)) {
2458 msecs_to_jiffies(params->spp_hbinterval);
2459 sctp_transport_reset_hb_timer(trans);
2462 msecs_to_jiffies(params->spp_hbinterval);
2464 sp->hbinterval = params->spp_hbinterval;
2471 trans->param_flags =
2472 (trans->param_flags & ~SPP_HB) | hb_change;
2475 (asoc->param_flags & ~SPP_HB) | hb_change;
2478 (sp->param_flags & ~SPP_HB) | hb_change;
2482 /* When Path MTU discovery is disabled the value specified here will
2483 * be the "fixed" path mtu (i.e. the value of the spp_flags field must
2484 * include the flag SPP_PMTUD_DISABLE for this field to have any
2487 if ((params->spp_flags & SPP_PMTUD_DISABLE) && params->spp_pathmtu) {
2489 trans->pathmtu = params->spp_pathmtu;
2490 sctp_assoc_sync_pmtu(asoc);
2492 sctp_assoc_set_pmtu(asoc, params->spp_pathmtu);
2494 sp->pathmtu = params->spp_pathmtu;
2500 int update = (trans->param_flags & SPP_PMTUD_DISABLE) &&
2501 (params->spp_flags & SPP_PMTUD_ENABLE);
2502 trans->param_flags =
2503 (trans->param_flags & ~SPP_PMTUD) | pmtud_change;
2505 sctp_transport_pmtu(trans, sctp_opt2sk(sp));
2506 sctp_assoc_sync_pmtu(asoc);
2508 sctp_transport_pl_reset(trans);
2511 (asoc->param_flags & ~SPP_PMTUD) | pmtud_change;
2514 (sp->param_flags & ~SPP_PMTUD) | pmtud_change;
2518 /* Note that unless the spp_flag is set to SPP_SACKDELAY_ENABLE the
2519 * value of this field is ignored. Note also that a value of zero
2520 * indicates the current setting should be left unchanged.
2522 if ((params->spp_flags & SPP_SACKDELAY_ENABLE) && params->spp_sackdelay) {
2525 msecs_to_jiffies(params->spp_sackdelay);
2528 msecs_to_jiffies(params->spp_sackdelay);
2530 sp->sackdelay = params->spp_sackdelay;
2534 if (sackdelay_change) {
2536 trans->param_flags =
2537 (trans->param_flags & ~SPP_SACKDELAY) |
2541 (asoc->param_flags & ~SPP_SACKDELAY) |
2545 (sp->param_flags & ~SPP_SACKDELAY) |
2550 /* Note that a value of zero indicates the current setting should be
2553 if (params->spp_pathmaxrxt) {
2555 trans->pathmaxrxt = params->spp_pathmaxrxt;
2557 asoc->pathmaxrxt = params->spp_pathmaxrxt;
2559 sp->pathmaxrxt = params->spp_pathmaxrxt;
2563 if (params->spp_flags & SPP_IPV6_FLOWLABEL) {
2565 if (trans->ipaddr.sa.sa_family == AF_INET6) {
2566 trans->flowlabel = params->spp_ipv6_flowlabel &
2567 SCTP_FLOWLABEL_VAL_MASK;
2568 trans->flowlabel |= SCTP_FLOWLABEL_SET_MASK;
2571 struct sctp_transport *t;
2573 list_for_each_entry(t, &asoc->peer.transport_addr_list,
2575 if (t->ipaddr.sa.sa_family != AF_INET6)
2577 t->flowlabel = params->spp_ipv6_flowlabel &
2578 SCTP_FLOWLABEL_VAL_MASK;
2579 t->flowlabel |= SCTP_FLOWLABEL_SET_MASK;
2581 asoc->flowlabel = params->spp_ipv6_flowlabel &
2582 SCTP_FLOWLABEL_VAL_MASK;
2583 asoc->flowlabel |= SCTP_FLOWLABEL_SET_MASK;
2584 } else if (sctp_opt2sk(sp)->sk_family == AF_INET6) {
2585 sp->flowlabel = params->spp_ipv6_flowlabel &
2586 SCTP_FLOWLABEL_VAL_MASK;
2587 sp->flowlabel |= SCTP_FLOWLABEL_SET_MASK;
2591 if (params->spp_flags & SPP_DSCP) {
2593 trans->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK;
2594 trans->dscp |= SCTP_DSCP_SET_MASK;
2596 struct sctp_transport *t;
2598 list_for_each_entry(t, &asoc->peer.transport_addr_list,
2600 t->dscp = params->spp_dscp &
2602 t->dscp |= SCTP_DSCP_SET_MASK;
2604 asoc->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK;
2605 asoc->dscp |= SCTP_DSCP_SET_MASK;
2607 sp->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK;
2608 sp->dscp |= SCTP_DSCP_SET_MASK;
2615 static int sctp_setsockopt_peer_addr_params(struct sock *sk,
2616 struct sctp_paddrparams *params,
2617 unsigned int optlen)
2619 struct sctp_transport *trans = NULL;
2620 struct sctp_association *asoc = NULL;
2621 struct sctp_sock *sp = sctp_sk(sk);
2623 int hb_change, pmtud_change, sackdelay_change;
2625 if (optlen == ALIGN(offsetof(struct sctp_paddrparams,
2626 spp_ipv6_flowlabel), 4)) {
2627 if (params->spp_flags & (SPP_DSCP | SPP_IPV6_FLOWLABEL))
2629 } else if (optlen != sizeof(*params)) {
2633 /* Validate flags and value parameters. */
2634 hb_change = params->spp_flags & SPP_HB;
2635 pmtud_change = params->spp_flags & SPP_PMTUD;
2636 sackdelay_change = params->spp_flags & SPP_SACKDELAY;
2638 if (hb_change == SPP_HB ||
2639 pmtud_change == SPP_PMTUD ||
2640 sackdelay_change == SPP_SACKDELAY ||
2641 params->spp_sackdelay > 500 ||
2642 (params->spp_pathmtu &&
2643 params->spp_pathmtu < SCTP_DEFAULT_MINSEGMENT))
2646 /* If an address other than INADDR_ANY is specified, and
2647 * no transport is found, then the request is invalid.
2649 if (!sctp_is_any(sk, (union sctp_addr *)¶ms->spp_address)) {
2650 trans = sctp_addr_id2transport(sk, ¶ms->spp_address,
2651 params->spp_assoc_id);
2656 /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
2657 * socket is a one to many style socket, and an association
2658 * was not found, then the id was invalid.
2660 asoc = sctp_id2assoc(sk, params->spp_assoc_id);
2661 if (!asoc && params->spp_assoc_id != SCTP_FUTURE_ASSOC &&
2662 sctp_style(sk, UDP))
2665 /* Heartbeat demand can only be sent on a transport or
2666 * association, but not a socket.
2668 if (params->spp_flags & SPP_HB_DEMAND && !trans && !asoc)
2671 /* Process parameters. */
2672 error = sctp_apply_peer_addr_params(params, trans, asoc, sp,
2673 hb_change, pmtud_change,
2679 /* If changes are for association, also apply parameters to each
2682 if (!trans && asoc) {
2683 list_for_each_entry(trans, &asoc->peer.transport_addr_list,
2685 sctp_apply_peer_addr_params(params, trans, asoc, sp,
2686 hb_change, pmtud_change,
2694 static inline __u32 sctp_spp_sackdelay_enable(__u32 param_flags)
2696 return (param_flags & ~SPP_SACKDELAY) | SPP_SACKDELAY_ENABLE;
2699 static inline __u32 sctp_spp_sackdelay_disable(__u32 param_flags)
2701 return (param_flags & ~SPP_SACKDELAY) | SPP_SACKDELAY_DISABLE;
2704 static void sctp_apply_asoc_delayed_ack(struct sctp_sack_info *params,
2705 struct sctp_association *asoc)
2707 struct sctp_transport *trans;
2709 if (params->sack_delay) {
2710 asoc->sackdelay = msecs_to_jiffies(params->sack_delay);
2712 sctp_spp_sackdelay_enable(asoc->param_flags);
2714 if (params->sack_freq == 1) {
2716 sctp_spp_sackdelay_disable(asoc->param_flags);
2717 } else if (params->sack_freq > 1) {
2718 asoc->sackfreq = params->sack_freq;
2720 sctp_spp_sackdelay_enable(asoc->param_flags);
2723 list_for_each_entry(trans, &asoc->peer.transport_addr_list,
2725 if (params->sack_delay) {
2726 trans->sackdelay = msecs_to_jiffies(params->sack_delay);
2727 trans->param_flags =
2728 sctp_spp_sackdelay_enable(trans->param_flags);
2730 if (params->sack_freq == 1) {
2731 trans->param_flags =
2732 sctp_spp_sackdelay_disable(trans->param_flags);
2733 } else if (params->sack_freq > 1) {
2734 trans->sackfreq = params->sack_freq;
2735 trans->param_flags =
2736 sctp_spp_sackdelay_enable(trans->param_flags);
2742 * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK)
2744 * This option will effect the way delayed acks are performed. This
2745 * option allows you to get or set the delayed ack time, in
2746 * milliseconds. It also allows changing the delayed ack frequency.
2747 * Changing the frequency to 1 disables the delayed sack algorithm. If
2748 * the assoc_id is 0, then this sets or gets the endpoints default
2749 * values. If the assoc_id field is non-zero, then the set or get
2750 * effects the specified association for the one to many model (the
2751 * assoc_id field is ignored by the one to one model). Note that if
2752 * sack_delay or sack_freq are 0 when setting this option, then the
2753 * current values will remain unchanged.
2755 * struct sctp_sack_info {
2756 * sctp_assoc_t sack_assoc_id;
2757 * uint32_t sack_delay;
2758 * uint32_t sack_freq;
2761 * sack_assoc_id - This parameter, indicates which association the user
2762 * is performing an action upon. Note that if this field's value is
2763 * zero then the endpoints default value is changed (effecting future
2764 * associations only).
2766 * sack_delay - This parameter contains the number of milliseconds that
2767 * the user is requesting the delayed ACK timer be set to. Note that
2768 * this value is defined in the standard to be between 200 and 500
2771 * sack_freq - This parameter contains the number of packets that must
2772 * be received before a sack is sent without waiting for the delay
2773 * timer to expire. The default value for this is 2, setting this
2774 * value to 1 will disable the delayed sack algorithm.
2776 static int __sctp_setsockopt_delayed_ack(struct sock *sk,
2777 struct sctp_sack_info *params)
2779 struct sctp_sock *sp = sctp_sk(sk);
2780 struct sctp_association *asoc;
2782 /* Validate value parameter. */
2783 if (params->sack_delay > 500)
2786 /* Get association, if sack_assoc_id != SCTP_FUTURE_ASSOC and the
2787 * socket is a one to many style socket, and an association
2788 * was not found, then the id was invalid.
2790 asoc = sctp_id2assoc(sk, params->sack_assoc_id);
2791 if (!asoc && params->sack_assoc_id > SCTP_ALL_ASSOC &&
2792 sctp_style(sk, UDP))
2796 sctp_apply_asoc_delayed_ack(params, asoc);
2801 if (sctp_style(sk, TCP))
2802 params->sack_assoc_id = SCTP_FUTURE_ASSOC;
2804 if (params->sack_assoc_id == SCTP_FUTURE_ASSOC ||
2805 params->sack_assoc_id == SCTP_ALL_ASSOC) {
2806 if (params->sack_delay) {
2807 sp->sackdelay = params->sack_delay;
2809 sctp_spp_sackdelay_enable(sp->param_flags);
2811 if (params->sack_freq == 1) {
2813 sctp_spp_sackdelay_disable(sp->param_flags);
2814 } else if (params->sack_freq > 1) {
2815 sp->sackfreq = params->sack_freq;
2817 sctp_spp_sackdelay_enable(sp->param_flags);
2821 if (params->sack_assoc_id == SCTP_CURRENT_ASSOC ||
2822 params->sack_assoc_id == SCTP_ALL_ASSOC)
2823 list_for_each_entry(asoc, &sp->ep->asocs, asocs)
2824 sctp_apply_asoc_delayed_ack(params, asoc);
2829 static int sctp_setsockopt_delayed_ack(struct sock *sk,
2830 struct sctp_sack_info *params,
2831 unsigned int optlen)
2833 if (optlen == sizeof(struct sctp_assoc_value)) {
2834 struct sctp_assoc_value *v = (struct sctp_assoc_value *)params;
2835 struct sctp_sack_info p;
2837 pr_warn_ratelimited(DEPRECATED
2839 "Use of struct sctp_assoc_value in delayed_ack socket option.\n"
2840 "Use struct sctp_sack_info instead\n",
2841 current->comm, task_pid_nr(current));
2843 p.sack_assoc_id = v->assoc_id;
2844 p.sack_delay = v->assoc_value;
2845 p.sack_freq = v->assoc_value ? 0 : 1;
2846 return __sctp_setsockopt_delayed_ack(sk, &p);
2849 if (optlen != sizeof(struct sctp_sack_info))
2851 if (params->sack_delay == 0 && params->sack_freq == 0)
2853 return __sctp_setsockopt_delayed_ack(sk, params);
2856 /* 7.1.3 Initialization Parameters (SCTP_INITMSG)
2858 * Applications can specify protocol parameters for the default association
2859 * initialization. The option name argument to setsockopt() and getsockopt()
2862 * Setting initialization parameters is effective only on an unconnected
2863 * socket (for UDP-style sockets only future associations are effected
2864 * by the change). With TCP-style sockets, this option is inherited by
2865 * sockets derived from a listener socket.
2867 static int sctp_setsockopt_initmsg(struct sock *sk, struct sctp_initmsg *sinit,
2868 unsigned int optlen)
2870 struct sctp_sock *sp = sctp_sk(sk);
2872 if (optlen != sizeof(struct sctp_initmsg))
2875 if (sinit->sinit_num_ostreams)
2876 sp->initmsg.sinit_num_ostreams = sinit->sinit_num_ostreams;
2877 if (sinit->sinit_max_instreams)
2878 sp->initmsg.sinit_max_instreams = sinit->sinit_max_instreams;
2879 if (sinit->sinit_max_attempts)
2880 sp->initmsg.sinit_max_attempts = sinit->sinit_max_attempts;
2881 if (sinit->sinit_max_init_timeo)
2882 sp->initmsg.sinit_max_init_timeo = sinit->sinit_max_init_timeo;
2888 * 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM)
2890 * Applications that wish to use the sendto() system call may wish to
2891 * specify a default set of parameters that would normally be supplied
2892 * through the inclusion of ancillary data. This socket option allows
2893 * such an application to set the default sctp_sndrcvinfo structure.
2894 * The application that wishes to use this socket option simply passes
2895 * in to this call the sctp_sndrcvinfo structure defined in Section
2896 * 5.2.2) The input parameters accepted by this call include
2897 * sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context,
2898 * sinfo_timetolive. The user must provide the sinfo_assoc_id field in
2899 * to this call if the caller is using the UDP model.
2901 static int sctp_setsockopt_default_send_param(struct sock *sk,
2902 struct sctp_sndrcvinfo *info,
2903 unsigned int optlen)
2905 struct sctp_sock *sp = sctp_sk(sk);
2906 struct sctp_association *asoc;
2908 if (optlen != sizeof(*info))
2910 if (info->sinfo_flags &
2911 ~(SCTP_UNORDERED | SCTP_ADDR_OVER |
2912 SCTP_ABORT | SCTP_EOF))
2915 asoc = sctp_id2assoc(sk, info->sinfo_assoc_id);
2916 if (!asoc && info->sinfo_assoc_id > SCTP_ALL_ASSOC &&
2917 sctp_style(sk, UDP))
2921 asoc->default_stream = info->sinfo_stream;
2922 asoc->default_flags = info->sinfo_flags;
2923 asoc->default_ppid = info->sinfo_ppid;
2924 asoc->default_context = info->sinfo_context;
2925 asoc->default_timetolive = info->sinfo_timetolive;
2930 if (sctp_style(sk, TCP))
2931 info->sinfo_assoc_id = SCTP_FUTURE_ASSOC;
2933 if (info->sinfo_assoc_id == SCTP_FUTURE_ASSOC ||
2934 info->sinfo_assoc_id == SCTP_ALL_ASSOC) {
2935 sp->default_stream = info->sinfo_stream;
2936 sp->default_flags = info->sinfo_flags;
2937 sp->default_ppid = info->sinfo_ppid;
2938 sp->default_context = info->sinfo_context;
2939 sp->default_timetolive = info->sinfo_timetolive;
2942 if (info->sinfo_assoc_id == SCTP_CURRENT_ASSOC ||
2943 info->sinfo_assoc_id == SCTP_ALL_ASSOC) {
2944 list_for_each_entry(asoc, &sp->ep->asocs, asocs) {
2945 asoc->default_stream = info->sinfo_stream;
2946 asoc->default_flags = info->sinfo_flags;
2947 asoc->default_ppid = info->sinfo_ppid;
2948 asoc->default_context = info->sinfo_context;
2949 asoc->default_timetolive = info->sinfo_timetolive;
2956 /* RFC6458, Section 8.1.31. Set/get Default Send Parameters
2957 * (SCTP_DEFAULT_SNDINFO)
2959 static int sctp_setsockopt_default_sndinfo(struct sock *sk,
2960 struct sctp_sndinfo *info,
2961 unsigned int optlen)
2963 struct sctp_sock *sp = sctp_sk(sk);
2964 struct sctp_association *asoc;
2966 if (optlen != sizeof(*info))
2968 if (info->snd_flags &
2969 ~(SCTP_UNORDERED | SCTP_ADDR_OVER |
2970 SCTP_ABORT | SCTP_EOF))
2973 asoc = sctp_id2assoc(sk, info->snd_assoc_id);
2974 if (!asoc && info->snd_assoc_id > SCTP_ALL_ASSOC &&
2975 sctp_style(sk, UDP))
2979 asoc->default_stream = info->snd_sid;
2980 asoc->default_flags = info->snd_flags;
2981 asoc->default_ppid = info->snd_ppid;
2982 asoc->default_context = info->snd_context;
2987 if (sctp_style(sk, TCP))
2988 info->snd_assoc_id = SCTP_FUTURE_ASSOC;
2990 if (info->snd_assoc_id == SCTP_FUTURE_ASSOC ||
2991 info->snd_assoc_id == SCTP_ALL_ASSOC) {
2992 sp->default_stream = info->snd_sid;
2993 sp->default_flags = info->snd_flags;
2994 sp->default_ppid = info->snd_ppid;
2995 sp->default_context = info->snd_context;
2998 if (info->snd_assoc_id == SCTP_CURRENT_ASSOC ||
2999 info->snd_assoc_id == SCTP_ALL_ASSOC) {
3000 list_for_each_entry(asoc, &sp->ep->asocs, asocs) {
3001 asoc->default_stream = info->snd_sid;
3002 asoc->default_flags = info->snd_flags;
3003 asoc->default_ppid = info->snd_ppid;
3004 asoc->default_context = info->snd_context;
3011 /* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
3013 * Requests that the local SCTP stack use the enclosed peer address as
3014 * the association primary. The enclosed address must be one of the
3015 * association peer's addresses.
3017 static int sctp_setsockopt_primary_addr(struct sock *sk, struct sctp_prim *prim,
3018 unsigned int optlen)
3020 struct sctp_transport *trans;
3024 if (optlen != sizeof(struct sctp_prim))
3027 /* Allow security module to validate address but need address len. */
3028 af = sctp_get_af_specific(prim->ssp_addr.ss_family);
3032 err = security_sctp_bind_connect(sk, SCTP_PRIMARY_ADDR,
3033 (struct sockaddr *)&prim->ssp_addr,
3038 trans = sctp_addr_id2transport(sk, &prim->ssp_addr, prim->ssp_assoc_id);
3042 sctp_assoc_set_primary(trans->asoc, trans);
3048 * 7.1.5 SCTP_NODELAY
3050 * Turn on/off any Nagle-like algorithm. This means that packets are
3051 * generally sent as soon as possible and no unnecessary delays are
3052 * introduced, at the cost of more packets in the network. Expects an
3053 * integer boolean flag.
3055 static int sctp_setsockopt_nodelay(struct sock *sk, int *val,
3056 unsigned int optlen)
3058 if (optlen < sizeof(int))
3060 sctp_sk(sk)->nodelay = (*val == 0) ? 0 : 1;
3066 * 7.1.1 SCTP_RTOINFO
3068 * The protocol parameters used to initialize and bound retransmission
3069 * timeout (RTO) are tunable. sctp_rtoinfo structure is used to access
3070 * and modify these parameters.
3071 * All parameters are time values, in milliseconds. A value of 0, when
3072 * modifying the parameters, indicates that the current value should not
3076 static int sctp_setsockopt_rtoinfo(struct sock *sk,
3077 struct sctp_rtoinfo *rtoinfo,
3078 unsigned int optlen)
3080 struct sctp_association *asoc;
3081 unsigned long rto_min, rto_max;
3082 struct sctp_sock *sp = sctp_sk(sk);
3084 if (optlen != sizeof (struct sctp_rtoinfo))
3087 asoc = sctp_id2assoc(sk, rtoinfo->srto_assoc_id);
3089 /* Set the values to the specific association */
3090 if (!asoc && rtoinfo->srto_assoc_id != SCTP_FUTURE_ASSOC &&
3091 sctp_style(sk, UDP))
3094 rto_max = rtoinfo->srto_max;
3095 rto_min = rtoinfo->srto_min;
3098 rto_max = asoc ? msecs_to_jiffies(rto_max) : rto_max;
3100 rto_max = asoc ? asoc->rto_max : sp->rtoinfo.srto_max;
3103 rto_min = asoc ? msecs_to_jiffies(rto_min) : rto_min;
3105 rto_min = asoc ? asoc->rto_min : sp->rtoinfo.srto_min;
3107 if (rto_min > rto_max)
3111 if (rtoinfo->srto_initial != 0)
3113 msecs_to_jiffies(rtoinfo->srto_initial);
3114 asoc->rto_max = rto_max;
3115 asoc->rto_min = rto_min;
3117 /* If there is no association or the association-id = 0
3118 * set the values to the endpoint.
3120 if (rtoinfo->srto_initial != 0)
3121 sp->rtoinfo.srto_initial = rtoinfo->srto_initial;
3122 sp->rtoinfo.srto_max = rto_max;
3123 sp->rtoinfo.srto_min = rto_min;
3131 * 7.1.2 SCTP_ASSOCINFO
3133 * This option is used to tune the maximum retransmission attempts
3134 * of the association.
3135 * Returns an error if the new association retransmission value is
3136 * greater than the sum of the retransmission value of the peer.
3137 * See [SCTP] for more information.
3140 static int sctp_setsockopt_associnfo(struct sock *sk,
3141 struct sctp_assocparams *assocparams,
3142 unsigned int optlen)
3145 struct sctp_association *asoc;
3147 if (optlen != sizeof(struct sctp_assocparams))
3150 asoc = sctp_id2assoc(sk, assocparams->sasoc_assoc_id);
3152 if (!asoc && assocparams->sasoc_assoc_id != SCTP_FUTURE_ASSOC &&
3153 sctp_style(sk, UDP))
3156 /* Set the values to the specific association */
3158 if (assocparams->sasoc_asocmaxrxt != 0) {
3161 struct sctp_transport *peer_addr;
3163 list_for_each_entry(peer_addr, &asoc->peer.transport_addr_list,
3165 path_sum += peer_addr->pathmaxrxt;
3169 /* Only validate asocmaxrxt if we have more than
3170 * one path/transport. We do this because path
3171 * retransmissions are only counted when we have more
3175 assocparams->sasoc_asocmaxrxt > path_sum)
3178 asoc->max_retrans = assocparams->sasoc_asocmaxrxt;
3181 if (assocparams->sasoc_cookie_life != 0)
3183 ms_to_ktime(assocparams->sasoc_cookie_life);
3185 /* Set the values to the endpoint */
3186 struct sctp_sock *sp = sctp_sk(sk);
3188 if (assocparams->sasoc_asocmaxrxt != 0)
3189 sp->assocparams.sasoc_asocmaxrxt =
3190 assocparams->sasoc_asocmaxrxt;
3191 if (assocparams->sasoc_cookie_life != 0)
3192 sp->assocparams.sasoc_cookie_life =
3193 assocparams->sasoc_cookie_life;
3199 * 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR)
3201 * This socket option is a boolean flag which turns on or off mapped V4
3202 * addresses. If this option is turned on and the socket is type
3203 * PF_INET6, then IPv4 addresses will be mapped to V6 representation.
3204 * If this option is turned off, then no mapping will be done of V4
3205 * addresses and a user will receive both PF_INET6 and PF_INET type
3206 * addresses on the socket.
3208 static int sctp_setsockopt_mappedv4(struct sock *sk, int *val,
3209 unsigned int optlen)
3211 struct sctp_sock *sp = sctp_sk(sk);
3213 if (optlen < sizeof(int))
3224 * 8.1.16. Get or Set the Maximum Fragmentation Size (SCTP_MAXSEG)
3225 * This option will get or set the maximum size to put in any outgoing
3226 * SCTP DATA chunk. If a message is larger than this size it will be
3227 * fragmented by SCTP into the specified size. Note that the underlying
3228 * SCTP implementation may fragment into smaller sized chunks when the
3229 * PMTU of the underlying association is smaller than the value set by
3230 * the user. The default value for this option is '0' which indicates
3231 * the user is NOT limiting fragmentation and only the PMTU will effect
3232 * SCTP's choice of DATA chunk size. Note also that values set larger
3233 * than the maximum size of an IP datagram will effectively let SCTP
3234 * control fragmentation (i.e. the same as setting this option to 0).
3236 * The following structure is used to access and modify this parameter:
3238 * struct sctp_assoc_value {
3239 * sctp_assoc_t assoc_id;
3240 * uint32_t assoc_value;
3243 * assoc_id: This parameter is ignored for one-to-one style sockets.
3244 * For one-to-many style sockets this parameter indicates which
3245 * association the user is performing an action upon. Note that if
3246 * this field's value is zero then the endpoints default value is
3247 * changed (effecting future associations only).
3248 * assoc_value: This parameter specifies the maximum size in bytes.
3250 static int sctp_setsockopt_maxseg(struct sock *sk,
3251 struct sctp_assoc_value *params,
3252 unsigned int optlen)
3254 struct sctp_sock *sp = sctp_sk(sk);
3255 struct sctp_association *asoc;
3256 sctp_assoc_t assoc_id;
3259 if (optlen == sizeof(int)) {
3260 pr_warn_ratelimited(DEPRECATED
3262 "Use of int in maxseg socket option.\n"
3263 "Use struct sctp_assoc_value instead\n",
3264 current->comm, task_pid_nr(current));
3265 assoc_id = SCTP_FUTURE_ASSOC;
3266 val = *(int *)params;
3267 } else if (optlen == sizeof(struct sctp_assoc_value)) {
3268 assoc_id = params->assoc_id;
3269 val = params->assoc_value;
3274 asoc = sctp_id2assoc(sk, assoc_id);
3275 if (!asoc && assoc_id != SCTP_FUTURE_ASSOC &&
3276 sctp_style(sk, UDP))
3280 int min_len, max_len;
3281 __u16 datasize = asoc ? sctp_datachk_len(&asoc->stream) :
3282 sizeof(struct sctp_data_chunk);
3284 min_len = sctp_min_frag_point(sp, datasize);
3285 max_len = SCTP_MAX_CHUNK_LEN - datasize;
3287 if (val < min_len || val > max_len)
3292 asoc->user_frag = val;
3293 sctp_assoc_update_frag_point(asoc);
3295 sp->user_frag = val;
3303 * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR)
3305 * Requests that the peer mark the enclosed address as the association
3306 * primary. The enclosed address must be one of the association's
3307 * locally bound addresses. The following structure is used to make a
3308 * set primary request:
3310 static int sctp_setsockopt_peer_primary_addr(struct sock *sk,
3311 struct sctp_setpeerprim *prim,
3312 unsigned int optlen)
3314 struct sctp_sock *sp;
3315 struct sctp_association *asoc = NULL;
3316 struct sctp_chunk *chunk;
3322 if (!sp->ep->asconf_enable)
3325 if (optlen != sizeof(struct sctp_setpeerprim))
3328 asoc = sctp_id2assoc(sk, prim->sspp_assoc_id);
3332 if (!asoc->peer.asconf_capable)
3335 if (asoc->peer.addip_disabled_mask & SCTP_PARAM_SET_PRIMARY)
3338 if (!sctp_state(asoc, ESTABLISHED))
3341 af = sctp_get_af_specific(prim->sspp_addr.ss_family);
3345 if (!af->addr_valid((union sctp_addr *)&prim->sspp_addr, sp, NULL))
3346 return -EADDRNOTAVAIL;
3348 if (!sctp_assoc_lookup_laddr(asoc, (union sctp_addr *)&prim->sspp_addr))
3349 return -EADDRNOTAVAIL;
3351 /* Allow security module to validate address. */
3352 err = security_sctp_bind_connect(sk, SCTP_SET_PEER_PRIMARY_ADDR,
3353 (struct sockaddr *)&prim->sspp_addr,
3358 /* Create an ASCONF chunk with SET_PRIMARY parameter */
3359 chunk = sctp_make_asconf_set_prim(asoc,
3360 (union sctp_addr *)&prim->sspp_addr);
3364 err = sctp_send_asconf(asoc, chunk);
3366 pr_debug("%s: we set peer primary addr primitively\n", __func__);
3371 static int sctp_setsockopt_adaptation_layer(struct sock *sk,
3372 struct sctp_setadaptation *adapt,
3373 unsigned int optlen)
3375 if (optlen != sizeof(struct sctp_setadaptation))
3378 sctp_sk(sk)->adaptation_ind = adapt->ssb_adaptation_ind;
3384 * 7.1.29. Set or Get the default context (SCTP_CONTEXT)
3386 * The context field in the sctp_sndrcvinfo structure is normally only
3387 * used when a failed message is retrieved holding the value that was
3388 * sent down on the actual send call. This option allows the setting of
3389 * a default context on an association basis that will be received on
3390 * reading messages from the peer. This is especially helpful in the
3391 * one-2-many model for an application to keep some reference to an
3392 * internal state machine that is processing messages on the
3393 * association. Note that the setting of this value only effects
3394 * received messages from the peer and does not effect the value that is
3395 * saved with outbound messages.
3397 static int sctp_setsockopt_context(struct sock *sk,
3398 struct sctp_assoc_value *params,
3399 unsigned int optlen)
3401 struct sctp_sock *sp = sctp_sk(sk);
3402 struct sctp_association *asoc;
3404 if (optlen != sizeof(struct sctp_assoc_value))
3407 asoc = sctp_id2assoc(sk, params->assoc_id);
3408 if (!asoc && params->assoc_id > SCTP_ALL_ASSOC &&
3409 sctp_style(sk, UDP))
3413 asoc->default_rcv_context = params->assoc_value;
3418 if (sctp_style(sk, TCP))
3419 params->assoc_id = SCTP_FUTURE_ASSOC;
3421 if (params->assoc_id == SCTP_FUTURE_ASSOC ||
3422 params->assoc_id == SCTP_ALL_ASSOC)
3423 sp->default_rcv_context = params->assoc_value;
3425 if (params->assoc_id == SCTP_CURRENT_ASSOC ||
3426 params->assoc_id == SCTP_ALL_ASSOC)
3427 list_for_each_entry(asoc, &sp->ep->asocs, asocs)
3428 asoc->default_rcv_context = params->assoc_value;
3434 * 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE)
3436 * This options will at a minimum specify if the implementation is doing
3437 * fragmented interleave. Fragmented interleave, for a one to many
3438 * socket, is when subsequent calls to receive a message may return
3439 * parts of messages from different associations. Some implementations
3440 * may allow you to turn this value on or off. If so, when turned off,
3441 * no fragment interleave will occur (which will cause a head of line
3442 * blocking amongst multiple associations sharing the same one to many
3443 * socket). When this option is turned on, then each receive call may
3444 * come from a different association (thus the user must receive data
3445 * with the extended calls (e.g. sctp_recvmsg) to keep track of which
3446 * association each receive belongs to.
3448 * This option takes a boolean value. A non-zero value indicates that
3449 * fragmented interleave is on. A value of zero indicates that
3450 * fragmented interleave is off.
3452 * Note that it is important that an implementation that allows this
3453 * option to be turned on, have it off by default. Otherwise an unaware
3454 * application using the one to many model may become confused and act
3457 static int sctp_setsockopt_fragment_interleave(struct sock *sk, int *val,
3458 unsigned int optlen)
3460 if (optlen != sizeof(int))
3463 sctp_sk(sk)->frag_interleave = !!*val;
3465 if (!sctp_sk(sk)->frag_interleave)
3466 sctp_sk(sk)->ep->intl_enable = 0;
3472 * 8.1.21. Set or Get the SCTP Partial Delivery Point
3473 * (SCTP_PARTIAL_DELIVERY_POINT)
3475 * This option will set or get the SCTP partial delivery point. This
3476 * point is the size of a message where the partial delivery API will be
3477 * invoked to help free up rwnd space for the peer. Setting this to a
3478 * lower value will cause partial deliveries to happen more often. The
3479 * calls argument is an integer that sets or gets the partial delivery
3480 * point. Note also that the call will fail if the user attempts to set
3481 * this value larger than the socket receive buffer size.
3483 * Note that any single message having a length smaller than or equal to
3484 * the SCTP partial delivery point will be delivered in one single read
3485 * call as long as the user provided buffer is large enough to hold the
3488 static int sctp_setsockopt_partial_delivery_point(struct sock *sk, u32 *val,
3489 unsigned int optlen)
3491 if (optlen != sizeof(u32))
3494 /* Note: We double the receive buffer from what the user sets
3495 * it to be, also initial rwnd is based on rcvbuf/2.
3497 if (*val > (sk->sk_rcvbuf >> 1))
3500 sctp_sk(sk)->pd_point = *val;
3502 return 0; /* is this the right error code? */
3506 * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST)
3508 * This option will allow a user to change the maximum burst of packets
3509 * that can be emitted by this association. Note that the default value
3510 * is 4, and some implementations may restrict this setting so that it
3511 * can only be lowered.
3513 * NOTE: This text doesn't seem right. Do this on a socket basis with
3514 * future associations inheriting the socket value.
3516 static int sctp_setsockopt_maxburst(struct sock *sk,
3517 struct sctp_assoc_value *params,
3518 unsigned int optlen)
3520 struct sctp_sock *sp = sctp_sk(sk);
3521 struct sctp_association *asoc;
3522 sctp_assoc_t assoc_id;
3525 if (optlen == sizeof(int)) {
3526 pr_warn_ratelimited(DEPRECATED
3528 "Use of int in max_burst socket option deprecated.\n"
3529 "Use struct sctp_assoc_value instead\n",
3530 current->comm, task_pid_nr(current));
3531 assoc_id = SCTP_FUTURE_ASSOC;
3532 assoc_value = *((int *)params);
3533 } else if (optlen == sizeof(struct sctp_assoc_value)) {
3534 assoc_id = params->assoc_id;
3535 assoc_value = params->assoc_value;
3539 asoc = sctp_id2assoc(sk, assoc_id);
3540 if (!asoc && assoc_id > SCTP_ALL_ASSOC && sctp_style(sk, UDP))
3544 asoc->max_burst = assoc_value;
3549 if (sctp_style(sk, TCP))
3550 assoc_id = SCTP_FUTURE_ASSOC;
3552 if (assoc_id == SCTP_FUTURE_ASSOC || assoc_id == SCTP_ALL_ASSOC)
3553 sp->max_burst = assoc_value;
3555 if (assoc_id == SCTP_CURRENT_ASSOC || assoc_id == SCTP_ALL_ASSOC)
3556 list_for_each_entry(asoc, &sp->ep->asocs, asocs)
3557 asoc->max_burst = assoc_value;
3563 * 7.1.18. Add a chunk that must be authenticated (SCTP_AUTH_CHUNK)
3565 * This set option adds a chunk type that the user is requesting to be
3566 * received only in an authenticated way. Changes to the list of chunks
3567 * will only effect future associations on the socket.
3569 static int sctp_setsockopt_auth_chunk(struct sock *sk,
3570 struct sctp_authchunk *val,
3571 unsigned int optlen)
3573 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
3575 if (!ep->auth_enable)
3578 if (optlen != sizeof(struct sctp_authchunk))
3581 switch (val->sauth_chunk) {
3583 case SCTP_CID_INIT_ACK:
3584 case SCTP_CID_SHUTDOWN_COMPLETE:
3589 /* add this chunk id to the endpoint */
3590 return sctp_auth_ep_add_chunkid(ep, val->sauth_chunk);
3594 * 7.1.19. Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT)
3596 * This option gets or sets the list of HMAC algorithms that the local
3597 * endpoint requires the peer to use.
3599 static int sctp_setsockopt_hmac_ident(struct sock *sk,
3600 struct sctp_hmacalgo *hmacs,
3601 unsigned int optlen)
3603 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
3606 if (!ep->auth_enable)
3609 if (optlen < sizeof(struct sctp_hmacalgo))
3611 optlen = min_t(unsigned int, optlen, sizeof(struct sctp_hmacalgo) +
3612 SCTP_AUTH_NUM_HMACS * sizeof(u16));
3614 idents = hmacs->shmac_num_idents;
3615 if (idents == 0 || idents > SCTP_AUTH_NUM_HMACS ||
3616 (idents * sizeof(u16)) > (optlen - sizeof(struct sctp_hmacalgo)))
3619 return sctp_auth_ep_set_hmacs(ep, hmacs);
3623 * 7.1.20. Set a shared key (SCTP_AUTH_KEY)
3625 * This option will set a shared secret key which is used to build an
3626 * association shared key.
3628 static int sctp_setsockopt_auth_key(struct sock *sk,
3629 struct sctp_authkey *authkey,
3630 unsigned int optlen)
3632 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
3633 struct sctp_association *asoc;
3636 if (optlen <= sizeof(struct sctp_authkey))
3638 /* authkey->sca_keylength is u16, so optlen can't be bigger than
3641 optlen = min_t(unsigned int, optlen, USHRT_MAX + sizeof(*authkey));
3643 if (authkey->sca_keylength > optlen - sizeof(*authkey))
3646 asoc = sctp_id2assoc(sk, authkey->sca_assoc_id);
3647 if (!asoc && authkey->sca_assoc_id > SCTP_ALL_ASSOC &&
3648 sctp_style(sk, UDP))
3652 ret = sctp_auth_set_key(ep, asoc, authkey);
3656 if (sctp_style(sk, TCP))
3657 authkey->sca_assoc_id = SCTP_FUTURE_ASSOC;
3659 if (authkey->sca_assoc_id == SCTP_FUTURE_ASSOC ||
3660 authkey->sca_assoc_id == SCTP_ALL_ASSOC) {
3661 ret = sctp_auth_set_key(ep, asoc, authkey);
3668 if (authkey->sca_assoc_id == SCTP_CURRENT_ASSOC ||
3669 authkey->sca_assoc_id == SCTP_ALL_ASSOC) {
3670 list_for_each_entry(asoc, &ep->asocs, asocs) {
3671 int res = sctp_auth_set_key(ep, asoc, authkey);
3679 memzero_explicit(authkey, optlen);
3684 * 7.1.21. Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY)
3686 * This option will get or set the active shared key to be used to build
3687 * the association shared key.
3689 static int sctp_setsockopt_active_key(struct sock *sk,
3690 struct sctp_authkeyid *val,
3691 unsigned int optlen)
3693 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
3694 struct sctp_association *asoc;
3697 if (optlen != sizeof(struct sctp_authkeyid))
3700 asoc = sctp_id2assoc(sk, val->scact_assoc_id);
3701 if (!asoc && val->scact_assoc_id > SCTP_ALL_ASSOC &&
3702 sctp_style(sk, UDP))
3706 return sctp_auth_set_active_key(ep, asoc, val->scact_keynumber);
3708 if (sctp_style(sk, TCP))
3709 val->scact_assoc_id = SCTP_FUTURE_ASSOC;
3711 if (val->scact_assoc_id == SCTP_FUTURE_ASSOC ||
3712 val->scact_assoc_id == SCTP_ALL_ASSOC) {
3713 ret = sctp_auth_set_active_key(ep, asoc, val->scact_keynumber);
3718 if (val->scact_assoc_id == SCTP_CURRENT_ASSOC ||
3719 val->scact_assoc_id == SCTP_ALL_ASSOC) {
3720 list_for_each_entry(asoc, &ep->asocs, asocs) {
3721 int res = sctp_auth_set_active_key(ep, asoc,
3722 val->scact_keynumber);
3733 * 7.1.22. Delete a shared key (SCTP_AUTH_DELETE_KEY)
3735 * This set option will delete a shared secret key from use.
3737 static int sctp_setsockopt_del_key(struct sock *sk,
3738 struct sctp_authkeyid *val,
3739 unsigned int optlen)
3741 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
3742 struct sctp_association *asoc;
3745 if (optlen != sizeof(struct sctp_authkeyid))
3748 asoc = sctp_id2assoc(sk, val->scact_assoc_id);
3749 if (!asoc && val->scact_assoc_id > SCTP_ALL_ASSOC &&
3750 sctp_style(sk, UDP))
3754 return sctp_auth_del_key_id(ep, asoc, val->scact_keynumber);
3756 if (sctp_style(sk, TCP))
3757 val->scact_assoc_id = SCTP_FUTURE_ASSOC;
3759 if (val->scact_assoc_id == SCTP_FUTURE_ASSOC ||
3760 val->scact_assoc_id == SCTP_ALL_ASSOC) {
3761 ret = sctp_auth_del_key_id(ep, asoc, val->scact_keynumber);
3766 if (val->scact_assoc_id == SCTP_CURRENT_ASSOC ||
3767 val->scact_assoc_id == SCTP_ALL_ASSOC) {
3768 list_for_each_entry(asoc, &ep->asocs, asocs) {
3769 int res = sctp_auth_del_key_id(ep, asoc,
3770 val->scact_keynumber);
3781 * 8.3.4 Deactivate a Shared Key (SCTP_AUTH_DEACTIVATE_KEY)
3783 * This set option will deactivate a shared secret key.
3785 static int sctp_setsockopt_deactivate_key(struct sock *sk,
3786 struct sctp_authkeyid *val,
3787 unsigned int optlen)
3789 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
3790 struct sctp_association *asoc;
3793 if (optlen != sizeof(struct sctp_authkeyid))
3796 asoc = sctp_id2assoc(sk, val->scact_assoc_id);
3797 if (!asoc && val->scact_assoc_id > SCTP_ALL_ASSOC &&
3798 sctp_style(sk, UDP))
3802 return sctp_auth_deact_key_id(ep, asoc, val->scact_keynumber);
3804 if (sctp_style(sk, TCP))
3805 val->scact_assoc_id = SCTP_FUTURE_ASSOC;
3807 if (val->scact_assoc_id == SCTP_FUTURE_ASSOC ||
3808 val->scact_assoc_id == SCTP_ALL_ASSOC) {
3809 ret = sctp_auth_deact_key_id(ep, asoc, val->scact_keynumber);
3814 if (val->scact_assoc_id == SCTP_CURRENT_ASSOC ||
3815 val->scact_assoc_id == SCTP_ALL_ASSOC) {
3816 list_for_each_entry(asoc, &ep->asocs, asocs) {
3817 int res = sctp_auth_deact_key_id(ep, asoc,
3818 val->scact_keynumber);
3829 * 8.1.23 SCTP_AUTO_ASCONF
3831 * This option will enable or disable the use of the automatic generation of
3832 * ASCONF chunks to add and delete addresses to an existing association. Note
3833 * that this option has two caveats namely: a) it only affects sockets that
3834 * are bound to all addresses available to the SCTP stack, and b) the system
3835 * administrator may have an overriding control that turns the ASCONF feature
3836 * off no matter what setting the socket option may have.
3837 * This option expects an integer boolean flag, where a non-zero value turns on
3838 * the option, and a zero value turns off the option.
3839 * Note. In this implementation, socket operation overrides default parameter
3840 * being set by sysctl as well as FreeBSD implementation
3842 static int sctp_setsockopt_auto_asconf(struct sock *sk, int *val,
3843 unsigned int optlen)
3845 struct sctp_sock *sp = sctp_sk(sk);
3847 if (optlen < sizeof(int))
3849 if (!sctp_is_ep_boundall(sk) && *val)
3851 if ((*val && sp->do_auto_asconf) || (!*val && !sp->do_auto_asconf))
3854 spin_lock_bh(&sock_net(sk)->sctp.addr_wq_lock);
3855 if (*val == 0 && sp->do_auto_asconf) {
3856 list_del(&sp->auto_asconf_list);
3857 sp->do_auto_asconf = 0;
3858 } else if (*val && !sp->do_auto_asconf) {
3859 list_add_tail(&sp->auto_asconf_list,
3860 &sock_net(sk)->sctp.auto_asconf_splist);
3861 sp->do_auto_asconf = 1;
3863 spin_unlock_bh(&sock_net(sk)->sctp.addr_wq_lock);
3868 * SCTP_PEER_ADDR_THLDS
3870 * This option allows us to alter the partially failed threshold for one or all
3871 * transports in an association. See Section 6.1 of:
3872 * http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txt
3874 static int sctp_setsockopt_paddr_thresholds(struct sock *sk,
3875 struct sctp_paddrthlds_v2 *val,
3876 unsigned int optlen, bool v2)
3878 struct sctp_transport *trans;
3879 struct sctp_association *asoc;
3882 len = v2 ? sizeof(*val) : sizeof(struct sctp_paddrthlds);
3886 if (v2 && val->spt_pathpfthld > val->spt_pathcpthld)
3889 if (!sctp_is_any(sk, (const union sctp_addr *)&val->spt_address)) {
3890 trans = sctp_addr_id2transport(sk, &val->spt_address,
3895 if (val->spt_pathmaxrxt)
3896 trans->pathmaxrxt = val->spt_pathmaxrxt;
3898 trans->ps_retrans = val->spt_pathcpthld;
3899 trans->pf_retrans = val->spt_pathpfthld;
3904 asoc = sctp_id2assoc(sk, val->spt_assoc_id);
3905 if (!asoc && val->spt_assoc_id != SCTP_FUTURE_ASSOC &&
3906 sctp_style(sk, UDP))
3910 list_for_each_entry(trans, &asoc->peer.transport_addr_list,
3912 if (val->spt_pathmaxrxt)
3913 trans->pathmaxrxt = val->spt_pathmaxrxt;
3915 trans->ps_retrans = val->spt_pathcpthld;
3916 trans->pf_retrans = val->spt_pathpfthld;
3919 if (val->spt_pathmaxrxt)
3920 asoc->pathmaxrxt = val->spt_pathmaxrxt;
3922 asoc->ps_retrans = val->spt_pathcpthld;
3923 asoc->pf_retrans = val->spt_pathpfthld;
3925 struct sctp_sock *sp = sctp_sk(sk);
3927 if (val->spt_pathmaxrxt)
3928 sp->pathmaxrxt = val->spt_pathmaxrxt;
3930 sp->ps_retrans = val->spt_pathcpthld;
3931 sp->pf_retrans = val->spt_pathpfthld;
3937 static int sctp_setsockopt_recvrcvinfo(struct sock *sk, int *val,
3938 unsigned int optlen)
3940 if (optlen < sizeof(int))
3943 sctp_sk(sk)->recvrcvinfo = (*val == 0) ? 0 : 1;
3948 static int sctp_setsockopt_recvnxtinfo(struct sock *sk, int *val,
3949 unsigned int optlen)
3951 if (optlen < sizeof(int))
3954 sctp_sk(sk)->recvnxtinfo = (*val == 0) ? 0 : 1;
3959 static int sctp_setsockopt_pr_supported(struct sock *sk,
3960 struct sctp_assoc_value *params,
3961 unsigned int optlen)
3963 struct sctp_association *asoc;
3965 if (optlen != sizeof(*params))
3968 asoc = sctp_id2assoc(sk, params->assoc_id);
3969 if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC &&
3970 sctp_style(sk, UDP))
3973 sctp_sk(sk)->ep->prsctp_enable = !!params->assoc_value;
3978 static int sctp_setsockopt_default_prinfo(struct sock *sk,
3979 struct sctp_default_prinfo *info,
3980 unsigned int optlen)
3982 struct sctp_sock *sp = sctp_sk(sk);
3983 struct sctp_association *asoc;
3984 int retval = -EINVAL;
3986 if (optlen != sizeof(*info))
3989 if (info->pr_policy & ~SCTP_PR_SCTP_MASK)
3992 if (info->pr_policy == SCTP_PR_SCTP_NONE)
3995 asoc = sctp_id2assoc(sk, info->pr_assoc_id);
3996 if (!asoc && info->pr_assoc_id > SCTP_ALL_ASSOC &&
3997 sctp_style(sk, UDP))
4003 SCTP_PR_SET_POLICY(asoc->default_flags, info->pr_policy);
4004 asoc->default_timetolive = info->pr_value;
4008 if (sctp_style(sk, TCP))
4009 info->pr_assoc_id = SCTP_FUTURE_ASSOC;
4011 if (info->pr_assoc_id == SCTP_FUTURE_ASSOC ||
4012 info->pr_assoc_id == SCTP_ALL_ASSOC) {
4013 SCTP_PR_SET_POLICY(sp->default_flags, info->pr_policy);
4014 sp->default_timetolive = info->pr_value;
4017 if (info->pr_assoc_id == SCTP_CURRENT_ASSOC ||
4018 info->pr_assoc_id == SCTP_ALL_ASSOC) {
4019 list_for_each_entry(asoc, &sp->ep->asocs, asocs) {
4020 SCTP_PR_SET_POLICY(asoc->default_flags,
4022 asoc->default_timetolive = info->pr_value;
4030 static int sctp_setsockopt_reconfig_supported(struct sock *sk,
4031 struct sctp_assoc_value *params,
4032 unsigned int optlen)
4034 struct sctp_association *asoc;
4035 int retval = -EINVAL;
4037 if (optlen != sizeof(*params))
4040 asoc = sctp_id2assoc(sk, params->assoc_id);
4041 if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC &&
4042 sctp_style(sk, UDP))
4045 sctp_sk(sk)->ep->reconf_enable = !!params->assoc_value;
4053 static int sctp_setsockopt_enable_strreset(struct sock *sk,
4054 struct sctp_assoc_value *params,
4055 unsigned int optlen)
4057 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
4058 struct sctp_association *asoc;
4059 int retval = -EINVAL;
4061 if (optlen != sizeof(*params))
4064 if (params->assoc_value & (~SCTP_ENABLE_STRRESET_MASK))
4067 asoc = sctp_id2assoc(sk, params->assoc_id);
4068 if (!asoc && params->assoc_id > SCTP_ALL_ASSOC &&
4069 sctp_style(sk, UDP))
4075 asoc->strreset_enable = params->assoc_value;
4079 if (sctp_style(sk, TCP))
4080 params->assoc_id = SCTP_FUTURE_ASSOC;
4082 if (params->assoc_id == SCTP_FUTURE_ASSOC ||
4083 params->assoc_id == SCTP_ALL_ASSOC)
4084 ep->strreset_enable = params->assoc_value;
4086 if (params->assoc_id == SCTP_CURRENT_ASSOC ||
4087 params->assoc_id == SCTP_ALL_ASSOC)
4088 list_for_each_entry(asoc, &ep->asocs, asocs)
4089 asoc->strreset_enable = params->assoc_value;
4095 static int sctp_setsockopt_reset_streams(struct sock *sk,
4096 struct sctp_reset_streams *params,
4097 unsigned int optlen)
4099 struct sctp_association *asoc;
4101 if (optlen < sizeof(*params))
4103 /* srs_number_streams is u16, so optlen can't be bigger than this. */
4104 optlen = min_t(unsigned int, optlen, USHRT_MAX +
4105 sizeof(__u16) * sizeof(*params));
4107 if (params->srs_number_streams * sizeof(__u16) >
4108 optlen - sizeof(*params))
4111 asoc = sctp_id2assoc(sk, params->srs_assoc_id);
4115 return sctp_send_reset_streams(asoc, params);
4118 static int sctp_setsockopt_reset_assoc(struct sock *sk, sctp_assoc_t *associd,
4119 unsigned int optlen)
4121 struct sctp_association *asoc;
4123 if (optlen != sizeof(*associd))
4126 asoc = sctp_id2assoc(sk, *associd);
4130 return sctp_send_reset_assoc(asoc);
4133 static int sctp_setsockopt_add_streams(struct sock *sk,
4134 struct sctp_add_streams *params,
4135 unsigned int optlen)
4137 struct sctp_association *asoc;
4139 if (optlen != sizeof(*params))
4142 asoc = sctp_id2assoc(sk, params->sas_assoc_id);
4146 return sctp_send_add_streams(asoc, params);
4149 static int sctp_setsockopt_scheduler(struct sock *sk,
4150 struct sctp_assoc_value *params,
4151 unsigned int optlen)
4153 struct sctp_sock *sp = sctp_sk(sk);
4154 struct sctp_association *asoc;
4157 if (optlen < sizeof(*params))
4160 if (params->assoc_value > SCTP_SS_MAX)
4163 asoc = sctp_id2assoc(sk, params->assoc_id);
4164 if (!asoc && params->assoc_id > SCTP_ALL_ASSOC &&
4165 sctp_style(sk, UDP))
4169 return sctp_sched_set_sched(asoc, params->assoc_value);
4171 if (sctp_style(sk, TCP))
4172 params->assoc_id = SCTP_FUTURE_ASSOC;
4174 if (params->assoc_id == SCTP_FUTURE_ASSOC ||
4175 params->assoc_id == SCTP_ALL_ASSOC)
4176 sp->default_ss = params->assoc_value;
4178 if (params->assoc_id == SCTP_CURRENT_ASSOC ||
4179 params->assoc_id == SCTP_ALL_ASSOC) {
4180 list_for_each_entry(asoc, &sp->ep->asocs, asocs) {
4181 int ret = sctp_sched_set_sched(asoc,
4182 params->assoc_value);
4192 static int sctp_setsockopt_scheduler_value(struct sock *sk,
4193 struct sctp_stream_value *params,
4194 unsigned int optlen)
4196 struct sctp_association *asoc;
4197 int retval = -EINVAL;
4199 if (optlen < sizeof(*params))
4202 asoc = sctp_id2assoc(sk, params->assoc_id);
4203 if (!asoc && params->assoc_id != SCTP_CURRENT_ASSOC &&
4204 sctp_style(sk, UDP))
4208 retval = sctp_sched_set_value(asoc, params->stream_id,
4209 params->stream_value, GFP_KERNEL);
4215 list_for_each_entry(asoc, &sctp_sk(sk)->ep->asocs, asocs) {
4216 int ret = sctp_sched_set_value(asoc, params->stream_id,
4217 params->stream_value,
4219 if (ret && !retval) /* try to return the 1st error. */
4227 static int sctp_setsockopt_interleaving_supported(struct sock *sk,
4228 struct sctp_assoc_value *p,
4229 unsigned int optlen)
4231 struct sctp_sock *sp = sctp_sk(sk);
4232 struct sctp_association *asoc;
4234 if (optlen < sizeof(*p))
4237 asoc = sctp_id2assoc(sk, p->assoc_id);
4238 if (!asoc && p->assoc_id != SCTP_FUTURE_ASSOC && sctp_style(sk, UDP))
4241 if (!sock_net(sk)->sctp.intl_enable || !sp->frag_interleave) {
4245 sp->ep->intl_enable = !!p->assoc_value;
4249 static int sctp_setsockopt_reuse_port(struct sock *sk, int *val,
4250 unsigned int optlen)
4252 if (!sctp_style(sk, TCP))
4255 if (sctp_sk(sk)->ep->base.bind_addr.port)
4258 if (optlen < sizeof(int))
4261 sctp_sk(sk)->reuse = !!*val;
4266 static int sctp_assoc_ulpevent_type_set(struct sctp_event *param,
4267 struct sctp_association *asoc)
4269 struct sctp_ulpevent *event;
4271 sctp_ulpevent_type_set(&asoc->subscribe, param->se_type, param->se_on);
4273 if (param->se_type == SCTP_SENDER_DRY_EVENT && param->se_on) {
4274 if (sctp_outq_is_empty(&asoc->outqueue)) {
4275 event = sctp_ulpevent_make_sender_dry_event(asoc,
4276 GFP_USER | __GFP_NOWARN);
4280 asoc->stream.si->enqueue_event(&asoc->ulpq, event);
4287 static int sctp_setsockopt_event(struct sock *sk, struct sctp_event *param,
4288 unsigned int optlen)
4290 struct sctp_sock *sp = sctp_sk(sk);
4291 struct sctp_association *asoc;
4294 if (optlen < sizeof(*param))
4297 if (param->se_type < SCTP_SN_TYPE_BASE ||
4298 param->se_type > SCTP_SN_TYPE_MAX)
4301 asoc = sctp_id2assoc(sk, param->se_assoc_id);
4302 if (!asoc && param->se_assoc_id > SCTP_ALL_ASSOC &&
4303 sctp_style(sk, UDP))
4307 return sctp_assoc_ulpevent_type_set(param, asoc);
4309 if (sctp_style(sk, TCP))
4310 param->se_assoc_id = SCTP_FUTURE_ASSOC;
4312 if (param->se_assoc_id == SCTP_FUTURE_ASSOC ||
4313 param->se_assoc_id == SCTP_ALL_ASSOC)
4314 sctp_ulpevent_type_set(&sp->subscribe,
4315 param->se_type, param->se_on);
4317 if (param->se_assoc_id == SCTP_CURRENT_ASSOC ||
4318 param->se_assoc_id == SCTP_ALL_ASSOC) {
4319 list_for_each_entry(asoc, &sp->ep->asocs, asocs) {
4320 int ret = sctp_assoc_ulpevent_type_set(param, asoc);
4330 static int sctp_setsockopt_asconf_supported(struct sock *sk,
4331 struct sctp_assoc_value *params,
4332 unsigned int optlen)
4334 struct sctp_association *asoc;
4335 struct sctp_endpoint *ep;
4336 int retval = -EINVAL;
4338 if (optlen != sizeof(*params))
4341 asoc = sctp_id2assoc(sk, params->assoc_id);
4342 if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC &&
4343 sctp_style(sk, UDP))
4346 ep = sctp_sk(sk)->ep;
4347 ep->asconf_enable = !!params->assoc_value;
4349 if (ep->asconf_enable && ep->auth_enable) {
4350 sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF);
4351 sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF_ACK);
4360 static int sctp_setsockopt_auth_supported(struct sock *sk,
4361 struct sctp_assoc_value *params,
4362 unsigned int optlen)
4364 struct sctp_association *asoc;
4365 struct sctp_endpoint *ep;
4366 int retval = -EINVAL;
4368 if (optlen != sizeof(*params))
4371 asoc = sctp_id2assoc(sk, params->assoc_id);
4372 if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC &&
4373 sctp_style(sk, UDP))
4376 ep = sctp_sk(sk)->ep;
4377 if (params->assoc_value) {
4378 retval = sctp_auth_init(ep, GFP_KERNEL);
4381 if (ep->asconf_enable) {
4382 sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF);
4383 sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF_ACK);
4387 ep->auth_enable = !!params->assoc_value;
4394 static int sctp_setsockopt_ecn_supported(struct sock *sk,
4395 struct sctp_assoc_value *params,
4396 unsigned int optlen)
4398 struct sctp_association *asoc;
4399 int retval = -EINVAL;
4401 if (optlen != sizeof(*params))
4404 asoc = sctp_id2assoc(sk, params->assoc_id);
4405 if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC &&
4406 sctp_style(sk, UDP))
4409 sctp_sk(sk)->ep->ecn_enable = !!params->assoc_value;
4416 static int sctp_setsockopt_pf_expose(struct sock *sk,
4417 struct sctp_assoc_value *params,
4418 unsigned int optlen)
4420 struct sctp_association *asoc;
4421 int retval = -EINVAL;
4423 if (optlen != sizeof(*params))
4426 if (params->assoc_value > SCTP_PF_EXPOSE_MAX)
4429 asoc = sctp_id2assoc(sk, params->assoc_id);
4430 if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC &&
4431 sctp_style(sk, UDP))
4435 asoc->pf_expose = params->assoc_value;
4437 sctp_sk(sk)->pf_expose = params->assoc_value;
4444 static int sctp_setsockopt_encap_port(struct sock *sk,
4445 struct sctp_udpencaps *encap,
4446 unsigned int optlen)
4448 struct sctp_association *asoc;
4449 struct sctp_transport *t;
4452 if (optlen != sizeof(*encap))
4455 /* If an address other than INADDR_ANY is specified, and
4456 * no transport is found, then the request is invalid.
4458 encap_port = (__force __be16)encap->sue_port;
4459 if (!sctp_is_any(sk, (union sctp_addr *)&encap->sue_address)) {
4460 t = sctp_addr_id2transport(sk, &encap->sue_address,
4461 encap->sue_assoc_id);
4465 t->encap_port = encap_port;
4469 /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
4470 * socket is a one to many style socket, and an association
4471 * was not found, then the id was invalid.
4473 asoc = sctp_id2assoc(sk, encap->sue_assoc_id);
4474 if (!asoc && encap->sue_assoc_id != SCTP_FUTURE_ASSOC &&
4475 sctp_style(sk, UDP))
4478 /* If changes are for association, also apply encap_port to
4482 list_for_each_entry(t, &asoc->peer.transport_addr_list,
4484 t->encap_port = encap_port;
4486 asoc->encap_port = encap_port;
4490 sctp_sk(sk)->encap_port = encap_port;
4494 static int sctp_setsockopt_probe_interval(struct sock *sk,
4495 struct sctp_probeinterval *params,
4496 unsigned int optlen)
4498 struct sctp_association *asoc;
4499 struct sctp_transport *t;
4500 __u32 probe_interval;
4502 if (optlen != sizeof(*params))
4505 probe_interval = params->spi_interval;
4506 if (probe_interval && probe_interval < SCTP_PROBE_TIMER_MIN)
4509 /* If an address other than INADDR_ANY is specified, and
4510 * no transport is found, then the request is invalid.
4512 if (!sctp_is_any(sk, (union sctp_addr *)¶ms->spi_address)) {
4513 t = sctp_addr_id2transport(sk, ¶ms->spi_address,
4514 params->spi_assoc_id);
4518 t->probe_interval = msecs_to_jiffies(probe_interval);
4519 sctp_transport_pl_reset(t);
4523 /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
4524 * socket is a one to many style socket, and an association
4525 * was not found, then the id was invalid.
4527 asoc = sctp_id2assoc(sk, params->spi_assoc_id);
4528 if (!asoc && params->spi_assoc_id != SCTP_FUTURE_ASSOC &&
4529 sctp_style(sk, UDP))
4532 /* If changes are for association, also apply probe_interval to
4536 list_for_each_entry(t, &asoc->peer.transport_addr_list, transports) {
4537 t->probe_interval = msecs_to_jiffies(probe_interval);
4538 sctp_transport_pl_reset(t);
4541 asoc->probe_interval = msecs_to_jiffies(probe_interval);
4545 sctp_sk(sk)->probe_interval = probe_interval;
4549 /* API 6.2 setsockopt(), getsockopt()
4551 * Applications use setsockopt() and getsockopt() to set or retrieve
4552 * socket options. Socket options are used to change the default
4553 * behavior of sockets calls. They are described in Section 7.
4557 * ret = getsockopt(int sd, int level, int optname, void __user *optval,
4558 * int __user *optlen);
4559 * ret = setsockopt(int sd, int level, int optname, const void __user *optval,
4562 * sd - the socket descript.
4563 * level - set to IPPROTO_SCTP for all SCTP options.
4564 * optname - the option name.
4565 * optval - the buffer to store the value of the option.
4566 * optlen - the size of the buffer.
4568 static int sctp_setsockopt(struct sock *sk, int level, int optname,
4569 sockptr_t optval, unsigned int optlen)
4574 pr_debug("%s: sk:%p, optname:%d\n", __func__, sk, optname);
4576 /* I can hardly begin to describe how wrong this is. This is
4577 * so broken as to be worse than useless. The API draft
4578 * REALLY is NOT helpful here... I am not convinced that the
4579 * semantics of setsockopt() with a level OTHER THAN SOL_SCTP
4580 * are at all well-founded.
4582 if (level != SOL_SCTP) {
4583 struct sctp_af *af = sctp_sk(sk)->pf->af;
4585 return af->setsockopt(sk, level, optname, optval, optlen);
4589 /* Trim it to the biggest size sctp sockopt may need if necessary */
4590 optlen = min_t(unsigned int, optlen,
4591 PAGE_ALIGN(USHRT_MAX +
4592 sizeof(__u16) * sizeof(struct sctp_reset_streams)));
4593 kopt = memdup_sockptr(optval, optlen);
4595 return PTR_ERR(kopt);
4601 case SCTP_SOCKOPT_BINDX_ADD:
4602 /* 'optlen' is the size of the addresses buffer. */
4603 retval = sctp_setsockopt_bindx(sk, kopt, optlen,
4604 SCTP_BINDX_ADD_ADDR);
4607 case SCTP_SOCKOPT_BINDX_REM:
4608 /* 'optlen' is the size of the addresses buffer. */
4609 retval = sctp_setsockopt_bindx(sk, kopt, optlen,
4610 SCTP_BINDX_REM_ADDR);
4613 case SCTP_SOCKOPT_CONNECTX_OLD:
4614 /* 'optlen' is the size of the addresses buffer. */
4615 retval = sctp_setsockopt_connectx_old(sk, kopt, optlen);
4618 case SCTP_SOCKOPT_CONNECTX:
4619 /* 'optlen' is the size of the addresses buffer. */
4620 retval = sctp_setsockopt_connectx(sk, kopt, optlen);
4623 case SCTP_DISABLE_FRAGMENTS:
4624 retval = sctp_setsockopt_disable_fragments(sk, kopt, optlen);
4628 retval = sctp_setsockopt_events(sk, kopt, optlen);
4631 case SCTP_AUTOCLOSE:
4632 retval = sctp_setsockopt_autoclose(sk, kopt, optlen);
4635 case SCTP_PEER_ADDR_PARAMS:
4636 retval = sctp_setsockopt_peer_addr_params(sk, kopt, optlen);
4639 case SCTP_DELAYED_SACK:
4640 retval = sctp_setsockopt_delayed_ack(sk, kopt, optlen);
4642 case SCTP_PARTIAL_DELIVERY_POINT:
4643 retval = sctp_setsockopt_partial_delivery_point(sk, kopt, optlen);
4647 retval = sctp_setsockopt_initmsg(sk, kopt, optlen);
4649 case SCTP_DEFAULT_SEND_PARAM:
4650 retval = sctp_setsockopt_default_send_param(sk, kopt, optlen);
4652 case SCTP_DEFAULT_SNDINFO:
4653 retval = sctp_setsockopt_default_sndinfo(sk, kopt, optlen);
4655 case SCTP_PRIMARY_ADDR:
4656 retval = sctp_setsockopt_primary_addr(sk, kopt, optlen);
4658 case SCTP_SET_PEER_PRIMARY_ADDR:
4659 retval = sctp_setsockopt_peer_primary_addr(sk, kopt, optlen);
4662 retval = sctp_setsockopt_nodelay(sk, kopt, optlen);
4665 retval = sctp_setsockopt_rtoinfo(sk, kopt, optlen);
4667 case SCTP_ASSOCINFO:
4668 retval = sctp_setsockopt_associnfo(sk, kopt, optlen);
4670 case SCTP_I_WANT_MAPPED_V4_ADDR:
4671 retval = sctp_setsockopt_mappedv4(sk, kopt, optlen);
4674 retval = sctp_setsockopt_maxseg(sk, kopt, optlen);
4676 case SCTP_ADAPTATION_LAYER:
4677 retval = sctp_setsockopt_adaptation_layer(sk, kopt, optlen);
4680 retval = sctp_setsockopt_context(sk, kopt, optlen);
4682 case SCTP_FRAGMENT_INTERLEAVE:
4683 retval = sctp_setsockopt_fragment_interleave(sk, kopt, optlen);
4685 case SCTP_MAX_BURST:
4686 retval = sctp_setsockopt_maxburst(sk, kopt, optlen);
4688 case SCTP_AUTH_CHUNK:
4689 retval = sctp_setsockopt_auth_chunk(sk, kopt, optlen);
4691 case SCTP_HMAC_IDENT:
4692 retval = sctp_setsockopt_hmac_ident(sk, kopt, optlen);
4695 retval = sctp_setsockopt_auth_key(sk, kopt, optlen);
4697 case SCTP_AUTH_ACTIVE_KEY:
4698 retval = sctp_setsockopt_active_key(sk, kopt, optlen);
4700 case SCTP_AUTH_DELETE_KEY:
4701 retval = sctp_setsockopt_del_key(sk, kopt, optlen);
4703 case SCTP_AUTH_DEACTIVATE_KEY:
4704 retval = sctp_setsockopt_deactivate_key(sk, kopt, optlen);
4706 case SCTP_AUTO_ASCONF:
4707 retval = sctp_setsockopt_auto_asconf(sk, kopt, optlen);
4709 case SCTP_PEER_ADDR_THLDS:
4710 retval = sctp_setsockopt_paddr_thresholds(sk, kopt, optlen,
4713 case SCTP_PEER_ADDR_THLDS_V2:
4714 retval = sctp_setsockopt_paddr_thresholds(sk, kopt, optlen,
4717 case SCTP_RECVRCVINFO:
4718 retval = sctp_setsockopt_recvrcvinfo(sk, kopt, optlen);
4720 case SCTP_RECVNXTINFO:
4721 retval = sctp_setsockopt_recvnxtinfo(sk, kopt, optlen);
4723 case SCTP_PR_SUPPORTED:
4724 retval = sctp_setsockopt_pr_supported(sk, kopt, optlen);
4726 case SCTP_DEFAULT_PRINFO:
4727 retval = sctp_setsockopt_default_prinfo(sk, kopt, optlen);
4729 case SCTP_RECONFIG_SUPPORTED:
4730 retval = sctp_setsockopt_reconfig_supported(sk, kopt, optlen);
4732 case SCTP_ENABLE_STREAM_RESET:
4733 retval = sctp_setsockopt_enable_strreset(sk, kopt, optlen);
4735 case SCTP_RESET_STREAMS:
4736 retval = sctp_setsockopt_reset_streams(sk, kopt, optlen);
4738 case SCTP_RESET_ASSOC:
4739 retval = sctp_setsockopt_reset_assoc(sk, kopt, optlen);
4741 case SCTP_ADD_STREAMS:
4742 retval = sctp_setsockopt_add_streams(sk, kopt, optlen);
4744 case SCTP_STREAM_SCHEDULER:
4745 retval = sctp_setsockopt_scheduler(sk, kopt, optlen);
4747 case SCTP_STREAM_SCHEDULER_VALUE:
4748 retval = sctp_setsockopt_scheduler_value(sk, kopt, optlen);
4750 case SCTP_INTERLEAVING_SUPPORTED:
4751 retval = sctp_setsockopt_interleaving_supported(sk, kopt,
4754 case SCTP_REUSE_PORT:
4755 retval = sctp_setsockopt_reuse_port(sk, kopt, optlen);
4758 retval = sctp_setsockopt_event(sk, kopt, optlen);
4760 case SCTP_ASCONF_SUPPORTED:
4761 retval = sctp_setsockopt_asconf_supported(sk, kopt, optlen);
4763 case SCTP_AUTH_SUPPORTED:
4764 retval = sctp_setsockopt_auth_supported(sk, kopt, optlen);
4766 case SCTP_ECN_SUPPORTED:
4767 retval = sctp_setsockopt_ecn_supported(sk, kopt, optlen);
4769 case SCTP_EXPOSE_POTENTIALLY_FAILED_STATE:
4770 retval = sctp_setsockopt_pf_expose(sk, kopt, optlen);
4772 case SCTP_REMOTE_UDP_ENCAPS_PORT:
4773 retval = sctp_setsockopt_encap_port(sk, kopt, optlen);
4775 case SCTP_PLPMTUD_PROBE_INTERVAL:
4776 retval = sctp_setsockopt_probe_interval(sk, kopt, optlen);
4779 retval = -ENOPROTOOPT;
4788 /* API 3.1.6 connect() - UDP Style Syntax
4790 * An application may use the connect() call in the UDP model to initiate an
4791 * association without sending data.
4795 * ret = connect(int sd, const struct sockaddr *nam, socklen_t len);
4797 * sd: the socket descriptor to have a new association added to.
4799 * nam: the address structure (either struct sockaddr_in or struct
4800 * sockaddr_in6 defined in RFC2553 [7]).
4802 * len: the size of the address.
4804 static int sctp_connect(struct sock *sk, struct sockaddr *addr,
4805 int addr_len, int flags)
4811 pr_debug("%s: sk:%p, sockaddr:%p, addr_len:%d\n", __func__, sk,
4814 /* Validate addr_len before calling common connect/connectx routine. */
4815 af = sctp_get_af_specific(addr->sa_family);
4816 if (af && addr_len >= af->sockaddr_len)
4817 err = __sctp_connect(sk, addr, af->sockaddr_len, flags, NULL);
4823 int sctp_inet_connect(struct socket *sock, struct sockaddr *uaddr,
4824 int addr_len, int flags)
4826 if (addr_len < sizeof(uaddr->sa_family))
4829 if (uaddr->sa_family == AF_UNSPEC)
4832 return sctp_connect(sock->sk, uaddr, addr_len, flags);
4835 /* FIXME: Write comments. */
4836 static int sctp_disconnect(struct sock *sk, int flags)
4838 return -EOPNOTSUPP; /* STUB */
4841 /* 4.1.4 accept() - TCP Style Syntax
4843 * Applications use accept() call to remove an established SCTP
4844 * association from the accept queue of the endpoint. A new socket
4845 * descriptor will be returned from accept() to represent the newly
4846 * formed association.
4848 static struct sock *sctp_accept(struct sock *sk, int flags, int *err, bool kern)
4850 struct sctp_sock *sp;
4851 struct sctp_endpoint *ep;
4852 struct sock *newsk = NULL;
4853 struct sctp_association *asoc;
4862 if (!sctp_style(sk, TCP)) {
4863 error = -EOPNOTSUPP;
4867 if (!sctp_sstate(sk, LISTENING)) {
4872 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
4874 error = sctp_wait_for_accept(sk, timeo);
4878 /* We treat the list of associations on the endpoint as the accept
4879 * queue and pick the first association on the list.
4881 asoc = list_entry(ep->asocs.next, struct sctp_association, asocs);
4883 newsk = sp->pf->create_accept_sk(sk, asoc, kern);
4889 /* Populate the fields of the newsk from the oldsk and migrate the
4890 * asoc to the newsk.
4892 error = sctp_sock_migrate(sk, newsk, asoc, SCTP_SOCKET_TCP);
4894 sk_common_release(newsk);
4904 /* The SCTP ioctl handler. */
4905 static int sctp_ioctl(struct sock *sk, int cmd, unsigned long arg)
4912 * SEQPACKET-style sockets in LISTENING state are valid, for
4913 * SCTP, so only discard TCP-style sockets in LISTENING state.
4915 if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))
4920 struct sk_buff *skb;
4921 unsigned int amount = 0;
4923 skb = skb_peek(&sk->sk_receive_queue);
4926 * We will only return the amount of this packet since
4927 * that is all that will be read.
4931 rc = put_user(amount, (int __user *)arg);
4943 /* This is the function which gets called during socket creation to
4944 * initialized the SCTP-specific portion of the sock.
4945 * The sock structure should already be zero-filled memory.
4947 static int sctp_init_sock(struct sock *sk)
4949 struct net *net = sock_net(sk);
4950 struct sctp_sock *sp;
4952 pr_debug("%s: sk:%p\n", __func__, sk);
4956 /* Initialize the SCTP per socket area. */
4957 switch (sk->sk_type) {
4958 case SOCK_SEQPACKET:
4959 sp->type = SCTP_SOCKET_UDP;
4962 sp->type = SCTP_SOCKET_TCP;
4965 return -ESOCKTNOSUPPORT;
4968 sk->sk_gso_type = SKB_GSO_SCTP;
4970 /* Initialize default send parameters. These parameters can be
4971 * modified with the SCTP_DEFAULT_SEND_PARAM socket option.
4973 sp->default_stream = 0;
4974 sp->default_ppid = 0;
4975 sp->default_flags = 0;
4976 sp->default_context = 0;
4977 sp->default_timetolive = 0;
4979 sp->default_rcv_context = 0;
4980 sp->max_burst = net->sctp.max_burst;
4982 sp->sctp_hmac_alg = net->sctp.sctp_hmac_alg;
4984 /* Initialize default setup parameters. These parameters
4985 * can be modified with the SCTP_INITMSG socket option or
4986 * overridden by the SCTP_INIT CMSG.
4988 sp->initmsg.sinit_num_ostreams = sctp_max_outstreams;
4989 sp->initmsg.sinit_max_instreams = sctp_max_instreams;
4990 sp->initmsg.sinit_max_attempts = net->sctp.max_retrans_init;
4991 sp->initmsg.sinit_max_init_timeo = net->sctp.rto_max;
4993 /* Initialize default RTO related parameters. These parameters can
4994 * be modified for with the SCTP_RTOINFO socket option.
4996 sp->rtoinfo.srto_initial = net->sctp.rto_initial;
4997 sp->rtoinfo.srto_max = net->sctp.rto_max;
4998 sp->rtoinfo.srto_min = net->sctp.rto_min;
5000 /* Initialize default association related parameters. These parameters
5001 * can be modified with the SCTP_ASSOCINFO socket option.
5003 sp->assocparams.sasoc_asocmaxrxt = net->sctp.max_retrans_association;
5004 sp->assocparams.sasoc_number_peer_destinations = 0;
5005 sp->assocparams.sasoc_peer_rwnd = 0;
5006 sp->assocparams.sasoc_local_rwnd = 0;
5007 sp->assocparams.sasoc_cookie_life = net->sctp.valid_cookie_life;
5009 /* Initialize default event subscriptions. By default, all the
5014 /* Default Peer Address Parameters. These defaults can
5015 * be modified via SCTP_PEER_ADDR_PARAMS
5017 sp->hbinterval = net->sctp.hb_interval;
5018 sp->udp_port = htons(net->sctp.udp_port);
5019 sp->encap_port = htons(net->sctp.encap_port);
5020 sp->pathmaxrxt = net->sctp.max_retrans_path;
5021 sp->pf_retrans = net->sctp.pf_retrans;
5022 sp->ps_retrans = net->sctp.ps_retrans;
5023 sp->pf_expose = net->sctp.pf_expose;
5024 sp->pathmtu = 0; /* allow default discovery */
5025 sp->sackdelay = net->sctp.sack_timeout;
5027 sp->param_flags = SPP_HB_ENABLE |
5029 SPP_SACKDELAY_ENABLE;
5030 sp->default_ss = SCTP_SS_DEFAULT;
5032 /* If enabled no SCTP message fragmentation will be performed.
5033 * Configure through SCTP_DISABLE_FRAGMENTS socket option.
5035 sp->disable_fragments = 0;
5037 /* Enable Nagle algorithm by default. */
5040 sp->recvrcvinfo = 0;
5041 sp->recvnxtinfo = 0;
5043 /* Enable by default. */
5046 /* Auto-close idle associations after the configured
5047 * number of seconds. A value of 0 disables this
5048 * feature. Configure through the SCTP_AUTOCLOSE socket option,
5049 * for UDP-style sockets only.
5053 /* User specified fragmentation limit. */
5056 sp->adaptation_ind = 0;
5058 sp->pf = sctp_get_pf_specific(sk->sk_family);
5060 /* Control variables for partial data delivery. */
5061 atomic_set(&sp->pd_mode, 0);
5062 skb_queue_head_init(&sp->pd_lobby);
5063 sp->frag_interleave = 0;
5064 sp->probe_interval = net->sctp.probe_interval;
5066 /* Create a per socket endpoint structure. Even if we
5067 * change the data structure relationships, this may still
5068 * be useful for storing pre-connect address information.
5070 sp->ep = sctp_endpoint_new(sk, GFP_KERNEL);
5076 sk->sk_destruct = sctp_destruct_sock;
5078 SCTP_DBG_OBJCNT_INC(sock);
5080 sk_sockets_allocated_inc(sk);
5081 sock_prot_inuse_add(net, sk->sk_prot, 1);
5086 /* Cleanup any SCTP per socket resources. Must be called with
5087 * sock_net(sk)->sctp.addr_wq_lock held if sp->do_auto_asconf is true
5089 static void sctp_destroy_sock(struct sock *sk)
5091 struct sctp_sock *sp;
5093 pr_debug("%s: sk:%p\n", __func__, sk);
5095 /* Release our hold on the endpoint. */
5097 /* This could happen during socket init, thus we bail out
5098 * early, since the rest of the below is not setup either.
5103 if (sp->do_auto_asconf) {
5104 sp->do_auto_asconf = 0;
5105 list_del(&sp->auto_asconf_list);
5107 sctp_endpoint_free(sp->ep);
5108 sk_sockets_allocated_dec(sk);
5109 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
5112 /* Triggered when there are no references on the socket anymore */
5113 static void sctp_destruct_common(struct sock *sk)
5115 struct sctp_sock *sp = sctp_sk(sk);
5117 /* Free up the HMAC transform. */
5118 crypto_free_shash(sp->hmac);
5121 static void sctp_destruct_sock(struct sock *sk)
5123 sctp_destruct_common(sk);
5124 inet_sock_destruct(sk);
5127 /* API 4.1.7 shutdown() - TCP Style Syntax
5128 * int shutdown(int socket, int how);
5130 * sd - the socket descriptor of the association to be closed.
5131 * how - Specifies the type of shutdown. The values are
5134 * Disables further receive operations. No SCTP
5135 * protocol action is taken.
5137 * Disables further send operations, and initiates
5138 * the SCTP shutdown sequence.
5140 * Disables further send and receive operations
5141 * and initiates the SCTP shutdown sequence.
5143 static void sctp_shutdown(struct sock *sk, int how)
5145 struct net *net = sock_net(sk);
5146 struct sctp_endpoint *ep;
5148 if (!sctp_style(sk, TCP))
5151 ep = sctp_sk(sk)->ep;
5152 if (how & SEND_SHUTDOWN && !list_empty(&ep->asocs)) {
5153 struct sctp_association *asoc;
5155 inet_sk_set_state(sk, SCTP_SS_CLOSING);
5156 asoc = list_entry(ep->asocs.next,
5157 struct sctp_association, asocs);
5158 sctp_primitive_SHUTDOWN(net, asoc, NULL);
5162 int sctp_get_sctp_info(struct sock *sk, struct sctp_association *asoc,
5163 struct sctp_info *info)
5165 struct sctp_transport *prim;
5166 struct list_head *pos;
5169 memset(info, 0, sizeof(*info));
5171 struct sctp_sock *sp = sctp_sk(sk);
5173 info->sctpi_s_autoclose = sp->autoclose;
5174 info->sctpi_s_adaptation_ind = sp->adaptation_ind;
5175 info->sctpi_s_pd_point = sp->pd_point;
5176 info->sctpi_s_nodelay = sp->nodelay;
5177 info->sctpi_s_disable_fragments = sp->disable_fragments;
5178 info->sctpi_s_v4mapped = sp->v4mapped;
5179 info->sctpi_s_frag_interleave = sp->frag_interleave;
5180 info->sctpi_s_type = sp->type;
5185 info->sctpi_tag = asoc->c.my_vtag;
5186 info->sctpi_state = asoc->state;
5187 info->sctpi_rwnd = asoc->a_rwnd;
5188 info->sctpi_unackdata = asoc->unack_data;
5189 info->sctpi_penddata = sctp_tsnmap_pending(&asoc->peer.tsn_map);
5190 info->sctpi_instrms = asoc->stream.incnt;
5191 info->sctpi_outstrms = asoc->stream.outcnt;
5192 list_for_each(pos, &asoc->base.inqueue.in_chunk_list)
5193 info->sctpi_inqueue++;
5194 list_for_each(pos, &asoc->outqueue.out_chunk_list)
5195 info->sctpi_outqueue++;
5196 info->sctpi_overall_error = asoc->overall_error_count;
5197 info->sctpi_max_burst = asoc->max_burst;
5198 info->sctpi_maxseg = asoc->frag_point;
5199 info->sctpi_peer_rwnd = asoc->peer.rwnd;
5200 info->sctpi_peer_tag = asoc->c.peer_vtag;
5202 mask = asoc->peer.ecn_capable << 1;
5203 mask = (mask | asoc->peer.ipv4_address) << 1;
5204 mask = (mask | asoc->peer.ipv6_address) << 1;
5205 mask = (mask | asoc->peer.hostname_address) << 1;
5206 mask = (mask | asoc->peer.asconf_capable) << 1;
5207 mask = (mask | asoc->peer.prsctp_capable) << 1;
5208 mask = (mask | asoc->peer.auth_capable);
5209 info->sctpi_peer_capable = mask;
5210 mask = asoc->peer.sack_needed << 1;
5211 mask = (mask | asoc->peer.sack_generation) << 1;
5212 mask = (mask | asoc->peer.zero_window_announced);
5213 info->sctpi_peer_sack = mask;
5215 info->sctpi_isacks = asoc->stats.isacks;
5216 info->sctpi_osacks = asoc->stats.osacks;
5217 info->sctpi_opackets = asoc->stats.opackets;
5218 info->sctpi_ipackets = asoc->stats.ipackets;
5219 info->sctpi_rtxchunks = asoc->stats.rtxchunks;
5220 info->sctpi_outofseqtsns = asoc->stats.outofseqtsns;
5221 info->sctpi_idupchunks = asoc->stats.idupchunks;
5222 info->sctpi_gapcnt = asoc->stats.gapcnt;
5223 info->sctpi_ouodchunks = asoc->stats.ouodchunks;
5224 info->sctpi_iuodchunks = asoc->stats.iuodchunks;
5225 info->sctpi_oodchunks = asoc->stats.oodchunks;
5226 info->sctpi_iodchunks = asoc->stats.iodchunks;
5227 info->sctpi_octrlchunks = asoc->stats.octrlchunks;
5228 info->sctpi_ictrlchunks = asoc->stats.ictrlchunks;
5230 prim = asoc->peer.primary_path;
5231 memcpy(&info->sctpi_p_address, &prim->ipaddr, sizeof(prim->ipaddr));
5232 info->sctpi_p_state = prim->state;
5233 info->sctpi_p_cwnd = prim->cwnd;
5234 info->sctpi_p_srtt = prim->srtt;
5235 info->sctpi_p_rto = jiffies_to_msecs(prim->rto);
5236 info->sctpi_p_hbinterval = prim->hbinterval;
5237 info->sctpi_p_pathmaxrxt = prim->pathmaxrxt;
5238 info->sctpi_p_sackdelay = jiffies_to_msecs(prim->sackdelay);
5239 info->sctpi_p_ssthresh = prim->ssthresh;
5240 info->sctpi_p_partial_bytes_acked = prim->partial_bytes_acked;
5241 info->sctpi_p_flight_size = prim->flight_size;
5242 info->sctpi_p_error = prim->error_count;
5246 EXPORT_SYMBOL_GPL(sctp_get_sctp_info);
5248 /* use callback to avoid exporting the core structure */
5249 void sctp_transport_walk_start(struct rhashtable_iter *iter) __acquires(RCU)
5251 rhltable_walk_enter(&sctp_transport_hashtable, iter);
5253 rhashtable_walk_start(iter);
5256 void sctp_transport_walk_stop(struct rhashtable_iter *iter) __releases(RCU)
5258 rhashtable_walk_stop(iter);
5259 rhashtable_walk_exit(iter);
5262 struct sctp_transport *sctp_transport_get_next(struct net *net,
5263 struct rhashtable_iter *iter)
5265 struct sctp_transport *t;
5267 t = rhashtable_walk_next(iter);
5268 for (; t; t = rhashtable_walk_next(iter)) {
5270 if (PTR_ERR(t) == -EAGAIN)
5275 if (!sctp_transport_hold(t))
5278 if (net_eq(t->asoc->base.net, net) &&
5279 t->asoc->peer.primary_path == t)
5282 sctp_transport_put(t);
5288 struct sctp_transport *sctp_transport_get_idx(struct net *net,
5289 struct rhashtable_iter *iter,
5292 struct sctp_transport *t;
5295 return SEQ_START_TOKEN;
5297 while ((t = sctp_transport_get_next(net, iter)) && !IS_ERR(t)) {
5300 sctp_transport_put(t);
5306 int sctp_for_each_endpoint(int (*cb)(struct sctp_endpoint *, void *),
5310 struct sctp_endpoint *ep;
5311 struct sctp_hashbucket *head;
5313 for (head = sctp_ep_hashtable; hash < sctp_ep_hashsize;
5315 read_lock_bh(&head->lock);
5316 sctp_for_each_hentry(ep, &head->chain) {
5321 read_unlock_bh(&head->lock);
5326 EXPORT_SYMBOL_GPL(sctp_for_each_endpoint);
5328 int sctp_transport_lookup_process(sctp_callback_t cb, struct net *net,
5329 const union sctp_addr *laddr,
5330 const union sctp_addr *paddr, void *p)
5332 struct sctp_transport *transport;
5333 struct sctp_endpoint *ep;
5337 transport = sctp_addrs_lookup_transport(net, laddr, paddr);
5342 ep = transport->asoc->ep;
5343 if (!sctp_endpoint_hold(ep)) { /* asoc can be peeled off */
5344 sctp_transport_put(transport);
5350 err = cb(ep, transport, p);
5351 sctp_endpoint_put(ep);
5352 sctp_transport_put(transport);
5355 EXPORT_SYMBOL_GPL(sctp_transport_lookup_process);
5357 int sctp_transport_traverse_process(sctp_callback_t cb, sctp_callback_t cb_done,
5358 struct net *net, int *pos, void *p)
5360 struct rhashtable_iter hti;
5361 struct sctp_transport *tsp;
5362 struct sctp_endpoint *ep;
5367 sctp_transport_walk_start(&hti);
5369 tsp = sctp_transport_get_idx(net, &hti, *pos + 1);
5370 for (; !IS_ERR_OR_NULL(tsp); tsp = sctp_transport_get_next(net, &hti)) {
5372 if (sctp_endpoint_hold(ep)) { /* asoc can be peeled off */
5373 ret = cb(ep, tsp, p);
5376 sctp_endpoint_put(ep);
5379 sctp_transport_put(tsp);
5381 sctp_transport_walk_stop(&hti);
5384 if (cb_done && !cb_done(ep, tsp, p)) {
5386 sctp_endpoint_put(ep);
5387 sctp_transport_put(tsp);
5390 sctp_endpoint_put(ep);
5391 sctp_transport_put(tsp);
5396 EXPORT_SYMBOL_GPL(sctp_transport_traverse_process);
5398 /* 7.2.1 Association Status (SCTP_STATUS)
5400 * Applications can retrieve current status information about an
5401 * association, including association state, peer receiver window size,
5402 * number of unacked data chunks, and number of data chunks pending
5403 * receipt. This information is read-only.
5405 static int sctp_getsockopt_sctp_status(struct sock *sk, int len,
5406 char __user *optval,
5409 struct sctp_status status;
5410 struct sctp_association *asoc = NULL;
5411 struct sctp_transport *transport;
5412 sctp_assoc_t associd;
5415 if (len < sizeof(status)) {
5420 len = sizeof(status);
5421 if (copy_from_user(&status, optval, len)) {
5426 associd = status.sstat_assoc_id;
5427 asoc = sctp_id2assoc(sk, associd);
5433 transport = asoc->peer.primary_path;
5435 status.sstat_assoc_id = sctp_assoc2id(asoc);
5436 status.sstat_state = sctp_assoc_to_state(asoc);
5437 status.sstat_rwnd = asoc->peer.rwnd;
5438 status.sstat_unackdata = asoc->unack_data;
5440 status.sstat_penddata = sctp_tsnmap_pending(&asoc->peer.tsn_map);
5441 status.sstat_instrms = asoc->stream.incnt;
5442 status.sstat_outstrms = asoc->stream.outcnt;
5443 status.sstat_fragmentation_point = asoc->frag_point;
5444 status.sstat_primary.spinfo_assoc_id = sctp_assoc2id(transport->asoc);
5445 memcpy(&status.sstat_primary.spinfo_address, &transport->ipaddr,
5446 transport->af_specific->sockaddr_len);
5447 /* Map ipv4 address into v4-mapped-on-v6 address. */
5448 sctp_get_pf_specific(sk->sk_family)->addr_to_user(sctp_sk(sk),
5449 (union sctp_addr *)&status.sstat_primary.spinfo_address);
5450 status.sstat_primary.spinfo_state = transport->state;
5451 status.sstat_primary.spinfo_cwnd = transport->cwnd;
5452 status.sstat_primary.spinfo_srtt = transport->srtt;
5453 status.sstat_primary.spinfo_rto = jiffies_to_msecs(transport->rto);
5454 status.sstat_primary.spinfo_mtu = transport->pathmtu;
5456 if (status.sstat_primary.spinfo_state == SCTP_UNKNOWN)
5457 status.sstat_primary.spinfo_state = SCTP_ACTIVE;
5459 if (put_user(len, optlen)) {
5464 pr_debug("%s: len:%d, state:%d, rwnd:%d, assoc_id:%d\n",
5465 __func__, len, status.sstat_state, status.sstat_rwnd,
5466 status.sstat_assoc_id);
5468 if (copy_to_user(optval, &status, len)) {
5478 /* 7.2.2 Peer Address Information (SCTP_GET_PEER_ADDR_INFO)
5480 * Applications can retrieve information about a specific peer address
5481 * of an association, including its reachability state, congestion
5482 * window, and retransmission timer values. This information is
5485 static int sctp_getsockopt_peer_addr_info(struct sock *sk, int len,
5486 char __user *optval,
5489 struct sctp_paddrinfo pinfo;
5490 struct sctp_transport *transport;
5493 if (len < sizeof(pinfo)) {
5498 len = sizeof(pinfo);
5499 if (copy_from_user(&pinfo, optval, len)) {
5504 transport = sctp_addr_id2transport(sk, &pinfo.spinfo_address,
5505 pinfo.spinfo_assoc_id);
5511 if (transport->state == SCTP_PF &&
5512 transport->asoc->pf_expose == SCTP_PF_EXPOSE_DISABLE) {
5517 pinfo.spinfo_assoc_id = sctp_assoc2id(transport->asoc);
5518 pinfo.spinfo_state = transport->state;
5519 pinfo.spinfo_cwnd = transport->cwnd;
5520 pinfo.spinfo_srtt = transport->srtt;
5521 pinfo.spinfo_rto = jiffies_to_msecs(transport->rto);
5522 pinfo.spinfo_mtu = transport->pathmtu;
5524 if (pinfo.spinfo_state == SCTP_UNKNOWN)
5525 pinfo.spinfo_state = SCTP_ACTIVE;
5527 if (put_user(len, optlen)) {
5532 if (copy_to_user(optval, &pinfo, len)) {
5541 /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS)
5543 * This option is a on/off flag. If enabled no SCTP message
5544 * fragmentation will be performed. Instead if a message being sent
5545 * exceeds the current PMTU size, the message will NOT be sent and
5546 * instead a error will be indicated to the user.
5548 static int sctp_getsockopt_disable_fragments(struct sock *sk, int len,
5549 char __user *optval, int __user *optlen)
5553 if (len < sizeof(int))
5557 val = (sctp_sk(sk)->disable_fragments == 1);
5558 if (put_user(len, optlen))
5560 if (copy_to_user(optval, &val, len))
5565 /* 7.1.15 Set notification and ancillary events (SCTP_EVENTS)
5567 * This socket option is used to specify various notifications and
5568 * ancillary data the user wishes to receive.
5570 static int sctp_getsockopt_events(struct sock *sk, int len, char __user *optval,
5573 struct sctp_event_subscribe subscribe;
5574 __u8 *sn_type = (__u8 *)&subscribe;
5579 if (len > sizeof(struct sctp_event_subscribe))
5580 len = sizeof(struct sctp_event_subscribe);
5581 if (put_user(len, optlen))
5584 for (i = 0; i < len; i++)
5585 sn_type[i] = sctp_ulpevent_type_enabled(sctp_sk(sk)->subscribe,
5586 SCTP_SN_TYPE_BASE + i);
5588 if (copy_to_user(optval, &subscribe, len))
5594 /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE)
5596 * This socket option is applicable to the UDP-style socket only. When
5597 * set it will cause associations that are idle for more than the
5598 * specified number of seconds to automatically close. An association
5599 * being idle is defined an association that has NOT sent or received
5600 * user data. The special value of '0' indicates that no automatic
5601 * close of any associations should be performed. The option expects an
5602 * integer defining the number of seconds of idle time before an
5603 * association is closed.
5605 static int sctp_getsockopt_autoclose(struct sock *sk, int len, char __user *optval, int __user *optlen)
5607 /* Applicable to UDP-style socket only */
5608 if (sctp_style(sk, TCP))
5610 if (len < sizeof(int))
5613 if (put_user(len, optlen))
5615 if (put_user(sctp_sk(sk)->autoclose, (int __user *)optval))
5620 /* Helper routine to branch off an association to a new socket. */
5621 int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp)
5623 struct sctp_association *asoc = sctp_id2assoc(sk, id);
5624 struct sctp_sock *sp = sctp_sk(sk);
5625 struct socket *sock;
5628 /* Do not peel off from one netns to another one. */
5629 if (!net_eq(current->nsproxy->net_ns, sock_net(sk)))
5635 /* An association cannot be branched off from an already peeled-off
5636 * socket, nor is this supported for tcp style sockets.
5638 if (!sctp_style(sk, UDP))
5641 /* Create a new socket. */
5642 err = sock_create(sk->sk_family, SOCK_SEQPACKET, IPPROTO_SCTP, &sock);
5646 sctp_copy_sock(sock->sk, sk, asoc);
5648 /* Make peeled-off sockets more like 1-1 accepted sockets.
5649 * Set the daddr and initialize id to something more random and also
5650 * copy over any ip options.
5652 sp->pf->to_sk_daddr(&asoc->peer.primary_addr, sock->sk);
5653 sp->pf->copy_ip_options(sk, sock->sk);
5655 /* Populate the fields of the newsk from the oldsk and migrate the
5656 * asoc to the newsk.
5658 err = sctp_sock_migrate(sk, sock->sk, asoc,
5659 SCTP_SOCKET_UDP_HIGH_BANDWIDTH);
5669 EXPORT_SYMBOL(sctp_do_peeloff);
5671 static int sctp_getsockopt_peeloff_common(struct sock *sk, sctp_peeloff_arg_t *peeloff,
5672 struct file **newfile, unsigned flags)
5674 struct socket *newsock;
5677 retval = sctp_do_peeloff(sk, peeloff->associd, &newsock);
5681 /* Map the socket to an unused fd that can be returned to the user. */
5682 retval = get_unused_fd_flags(flags & SOCK_CLOEXEC);
5684 sock_release(newsock);
5688 *newfile = sock_alloc_file(newsock, 0, NULL);
5689 if (IS_ERR(*newfile)) {
5690 put_unused_fd(retval);
5691 retval = PTR_ERR(*newfile);
5696 pr_debug("%s: sk:%p, newsk:%p, sd:%d\n", __func__, sk, newsock->sk,
5699 peeloff->sd = retval;
5701 if (flags & SOCK_NONBLOCK)
5702 (*newfile)->f_flags |= O_NONBLOCK;
5707 static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval, int __user *optlen)
5709 sctp_peeloff_arg_t peeloff;
5710 struct file *newfile = NULL;
5713 if (len < sizeof(sctp_peeloff_arg_t))
5715 len = sizeof(sctp_peeloff_arg_t);
5716 if (copy_from_user(&peeloff, optval, len))
5719 retval = sctp_getsockopt_peeloff_common(sk, &peeloff, &newfile, 0);
5723 /* Return the fd mapped to the new socket. */
5724 if (put_user(len, optlen)) {
5726 put_unused_fd(retval);
5730 if (copy_to_user(optval, &peeloff, len)) {
5732 put_unused_fd(retval);
5735 fd_install(retval, newfile);
5740 static int sctp_getsockopt_peeloff_flags(struct sock *sk, int len,
5741 char __user *optval, int __user *optlen)
5743 sctp_peeloff_flags_arg_t peeloff;
5744 struct file *newfile = NULL;
5747 if (len < sizeof(sctp_peeloff_flags_arg_t))
5749 len = sizeof(sctp_peeloff_flags_arg_t);
5750 if (copy_from_user(&peeloff, optval, len))
5753 retval = sctp_getsockopt_peeloff_common(sk, &peeloff.p_arg,
5754 &newfile, peeloff.flags);
5758 /* Return the fd mapped to the new socket. */
5759 if (put_user(len, optlen)) {
5761 put_unused_fd(retval);
5765 if (copy_to_user(optval, &peeloff, len)) {
5767 put_unused_fd(retval);
5770 fd_install(retval, newfile);
5775 /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS)
5777 * Applications can enable or disable heartbeats for any peer address of
5778 * an association, modify an address's heartbeat interval, force a
5779 * heartbeat to be sent immediately, and adjust the address's maximum
5780 * number of retransmissions sent before an address is considered
5781 * unreachable. The following structure is used to access and modify an
5782 * address's parameters:
5784 * struct sctp_paddrparams {
5785 * sctp_assoc_t spp_assoc_id;
5786 * struct sockaddr_storage spp_address;
5787 * uint32_t spp_hbinterval;
5788 * uint16_t spp_pathmaxrxt;
5789 * uint32_t spp_pathmtu;
5790 * uint32_t spp_sackdelay;
5791 * uint32_t spp_flags;
5794 * spp_assoc_id - (one-to-many style socket) This is filled in the
5795 * application, and identifies the association for
5797 * spp_address - This specifies which address is of interest.
5798 * spp_hbinterval - This contains the value of the heartbeat interval,
5799 * in milliseconds. If a value of zero
5800 * is present in this field then no changes are to
5801 * be made to this parameter.
5802 * spp_pathmaxrxt - This contains the maximum number of
5803 * retransmissions before this address shall be
5804 * considered unreachable. If a value of zero
5805 * is present in this field then no changes are to
5806 * be made to this parameter.
5807 * spp_pathmtu - When Path MTU discovery is disabled the value
5808 * specified here will be the "fixed" path mtu.
5809 * Note that if the spp_address field is empty
5810 * then all associations on this address will
5811 * have this fixed path mtu set upon them.
5813 * spp_sackdelay - When delayed sack is enabled, this value specifies
5814 * the number of milliseconds that sacks will be delayed
5815 * for. This value will apply to all addresses of an
5816 * association if the spp_address field is empty. Note
5817 * also, that if delayed sack is enabled and this
5818 * value is set to 0, no change is made to the last
5819 * recorded delayed sack timer value.
5821 * spp_flags - These flags are used to control various features
5822 * on an association. The flag field may contain
5823 * zero or more of the following options.
5825 * SPP_HB_ENABLE - Enable heartbeats on the
5826 * specified address. Note that if the address
5827 * field is empty all addresses for the association
5828 * have heartbeats enabled upon them.
5830 * SPP_HB_DISABLE - Disable heartbeats on the
5831 * speicifed address. Note that if the address
5832 * field is empty all addresses for the association
5833 * will have their heartbeats disabled. Note also
5834 * that SPP_HB_ENABLE and SPP_HB_DISABLE are
5835 * mutually exclusive, only one of these two should
5836 * be specified. Enabling both fields will have
5837 * undetermined results.
5839 * SPP_HB_DEMAND - Request a user initiated heartbeat
5840 * to be made immediately.
5842 * SPP_PMTUD_ENABLE - This field will enable PMTU
5843 * discovery upon the specified address. Note that
5844 * if the address feild is empty then all addresses
5845 * on the association are effected.
5847 * SPP_PMTUD_DISABLE - This field will disable PMTU
5848 * discovery upon the specified address. Note that
5849 * if the address feild is empty then all addresses
5850 * on the association are effected. Not also that
5851 * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually
5852 * exclusive. Enabling both will have undetermined
5855 * SPP_SACKDELAY_ENABLE - Setting this flag turns
5856 * on delayed sack. The time specified in spp_sackdelay
5857 * is used to specify the sack delay for this address. Note
5858 * that if spp_address is empty then all addresses will
5859 * enable delayed sack and take on the sack delay
5860 * value specified in spp_sackdelay.
5861 * SPP_SACKDELAY_DISABLE - Setting this flag turns
5862 * off delayed sack. If the spp_address field is blank then
5863 * delayed sack is disabled for the entire association. Note
5864 * also that this field is mutually exclusive to
5865 * SPP_SACKDELAY_ENABLE, setting both will have undefined
5868 * SPP_IPV6_FLOWLABEL: Setting this flag enables the
5869 * setting of the IPV6 flow label value. The value is
5870 * contained in the spp_ipv6_flowlabel field.
5871 * Upon retrieval, this flag will be set to indicate that
5872 * the spp_ipv6_flowlabel field has a valid value returned.
5873 * If a specific destination address is set (in the
5874 * spp_address field), then the value returned is that of
5875 * the address. If just an association is specified (and
5876 * no address), then the association's default flow label
5877 * is returned. If neither an association nor a destination
5878 * is specified, then the socket's default flow label is
5879 * returned. For non-IPv6 sockets, this flag will be left
5882 * SPP_DSCP: Setting this flag enables the setting of the
5883 * Differentiated Services Code Point (DSCP) value
5884 * associated with either the association or a specific
5885 * address. The value is obtained in the spp_dscp field.
5886 * Upon retrieval, this flag will be set to indicate that
5887 * the spp_dscp field has a valid value returned. If a
5888 * specific destination address is set when called (in the
5889 * spp_address field), then that specific destination
5890 * address's DSCP value is returned. If just an association
5891 * is specified, then the association's default DSCP is
5892 * returned. If neither an association nor a destination is
5893 * specified, then the socket's default DSCP is returned.
5895 * spp_ipv6_flowlabel
5896 * - This field is used in conjunction with the
5897 * SPP_IPV6_FLOWLABEL flag and contains the IPv6 flow label.
5898 * The 20 least significant bits are used for the flow
5899 * label. This setting has precedence over any IPv6-layer
5902 * spp_dscp - This field is used in conjunction with the SPP_DSCP flag
5903 * and contains the DSCP. The 6 most significant bits are
5904 * used for the DSCP. This setting has precedence over any
5905 * IPv4- or IPv6- layer setting.
5907 static int sctp_getsockopt_peer_addr_params(struct sock *sk, int len,
5908 char __user *optval, int __user *optlen)
5910 struct sctp_paddrparams params;
5911 struct sctp_transport *trans = NULL;
5912 struct sctp_association *asoc = NULL;
5913 struct sctp_sock *sp = sctp_sk(sk);
5915 if (len >= sizeof(params))
5916 len = sizeof(params);
5917 else if (len >= ALIGN(offsetof(struct sctp_paddrparams,
5918 spp_ipv6_flowlabel), 4))
5919 len = ALIGN(offsetof(struct sctp_paddrparams,
5920 spp_ipv6_flowlabel), 4);
5924 if (copy_from_user(¶ms, optval, len))
5927 /* If an address other than INADDR_ANY is specified, and
5928 * no transport is found, then the request is invalid.
5930 if (!sctp_is_any(sk, (union sctp_addr *)¶ms.spp_address)) {
5931 trans = sctp_addr_id2transport(sk, ¶ms.spp_address,
5932 params.spp_assoc_id);
5934 pr_debug("%s: failed no transport\n", __func__);
5939 /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
5940 * socket is a one to many style socket, and an association
5941 * was not found, then the id was invalid.
5943 asoc = sctp_id2assoc(sk, params.spp_assoc_id);
5944 if (!asoc && params.spp_assoc_id != SCTP_FUTURE_ASSOC &&
5945 sctp_style(sk, UDP)) {
5946 pr_debug("%s: failed no association\n", __func__);
5951 /* Fetch transport values. */
5952 params.spp_hbinterval = jiffies_to_msecs(trans->hbinterval);
5953 params.spp_pathmtu = trans->pathmtu;
5954 params.spp_pathmaxrxt = trans->pathmaxrxt;
5955 params.spp_sackdelay = jiffies_to_msecs(trans->sackdelay);
5957 /*draft-11 doesn't say what to return in spp_flags*/
5958 params.spp_flags = trans->param_flags;
5959 if (trans->flowlabel & SCTP_FLOWLABEL_SET_MASK) {
5960 params.spp_ipv6_flowlabel = trans->flowlabel &
5961 SCTP_FLOWLABEL_VAL_MASK;
5962 params.spp_flags |= SPP_IPV6_FLOWLABEL;
5964 if (trans->dscp & SCTP_DSCP_SET_MASK) {
5965 params.spp_dscp = trans->dscp & SCTP_DSCP_VAL_MASK;
5966 params.spp_flags |= SPP_DSCP;
5969 /* Fetch association values. */
5970 params.spp_hbinterval = jiffies_to_msecs(asoc->hbinterval);
5971 params.spp_pathmtu = asoc->pathmtu;
5972 params.spp_pathmaxrxt = asoc->pathmaxrxt;
5973 params.spp_sackdelay = jiffies_to_msecs(asoc->sackdelay);
5975 /*draft-11 doesn't say what to return in spp_flags*/
5976 params.spp_flags = asoc->param_flags;
5977 if (asoc->flowlabel & SCTP_FLOWLABEL_SET_MASK) {
5978 params.spp_ipv6_flowlabel = asoc->flowlabel &
5979 SCTP_FLOWLABEL_VAL_MASK;
5980 params.spp_flags |= SPP_IPV6_FLOWLABEL;
5982 if (asoc->dscp & SCTP_DSCP_SET_MASK) {
5983 params.spp_dscp = asoc->dscp & SCTP_DSCP_VAL_MASK;
5984 params.spp_flags |= SPP_DSCP;
5987 /* Fetch socket values. */
5988 params.spp_hbinterval = sp->hbinterval;
5989 params.spp_pathmtu = sp->pathmtu;
5990 params.spp_sackdelay = sp->sackdelay;
5991 params.spp_pathmaxrxt = sp->pathmaxrxt;
5993 /*draft-11 doesn't say what to return in spp_flags*/
5994 params.spp_flags = sp->param_flags;
5995 if (sp->flowlabel & SCTP_FLOWLABEL_SET_MASK) {
5996 params.spp_ipv6_flowlabel = sp->flowlabel &
5997 SCTP_FLOWLABEL_VAL_MASK;
5998 params.spp_flags |= SPP_IPV6_FLOWLABEL;
6000 if (sp->dscp & SCTP_DSCP_SET_MASK) {
6001 params.spp_dscp = sp->dscp & SCTP_DSCP_VAL_MASK;
6002 params.spp_flags |= SPP_DSCP;
6006 if (copy_to_user(optval, ¶ms, len))
6009 if (put_user(len, optlen))
6016 * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK)
6018 * This option will effect the way delayed acks are performed. This
6019 * option allows you to get or set the delayed ack time, in
6020 * milliseconds. It also allows changing the delayed ack frequency.
6021 * Changing the frequency to 1 disables the delayed sack algorithm. If
6022 * the assoc_id is 0, then this sets or gets the endpoints default
6023 * values. If the assoc_id field is non-zero, then the set or get
6024 * effects the specified association for the one to many model (the
6025 * assoc_id field is ignored by the one to one model). Note that if
6026 * sack_delay or sack_freq are 0 when setting this option, then the
6027 * current values will remain unchanged.
6029 * struct sctp_sack_info {
6030 * sctp_assoc_t sack_assoc_id;
6031 * uint32_t sack_delay;
6032 * uint32_t sack_freq;
6035 * sack_assoc_id - This parameter, indicates which association the user
6036 * is performing an action upon. Note that if this field's value is
6037 * zero then the endpoints default value is changed (effecting future
6038 * associations only).
6040 * sack_delay - This parameter contains the number of milliseconds that
6041 * the user is requesting the delayed ACK timer be set to. Note that
6042 * this value is defined in the standard to be between 200 and 500
6045 * sack_freq - This parameter contains the number of packets that must
6046 * be received before a sack is sent without waiting for the delay
6047 * timer to expire. The default value for this is 2, setting this
6048 * value to 1 will disable the delayed sack algorithm.
6050 static int sctp_getsockopt_delayed_ack(struct sock *sk, int len,
6051 char __user *optval,
6054 struct sctp_sack_info params;
6055 struct sctp_association *asoc = NULL;
6056 struct sctp_sock *sp = sctp_sk(sk);
6058 if (len >= sizeof(struct sctp_sack_info)) {
6059 len = sizeof(struct sctp_sack_info);
6061 if (copy_from_user(¶ms, optval, len))
6063 } else if (len == sizeof(struct sctp_assoc_value)) {
6064 pr_warn_ratelimited(DEPRECATED
6066 "Use of struct sctp_assoc_value in delayed_ack socket option.\n"
6067 "Use struct sctp_sack_info instead\n",
6068 current->comm, task_pid_nr(current));
6069 if (copy_from_user(¶ms, optval, len))
6074 /* Get association, if sack_assoc_id != SCTP_FUTURE_ASSOC and the
6075 * socket is a one to many style socket, and an association
6076 * was not found, then the id was invalid.
6078 asoc = sctp_id2assoc(sk, params.sack_assoc_id);
6079 if (!asoc && params.sack_assoc_id != SCTP_FUTURE_ASSOC &&
6080 sctp_style(sk, UDP))
6084 /* Fetch association values. */
6085 if (asoc->param_flags & SPP_SACKDELAY_ENABLE) {
6086 params.sack_delay = jiffies_to_msecs(asoc->sackdelay);
6087 params.sack_freq = asoc->sackfreq;
6090 params.sack_delay = 0;
6091 params.sack_freq = 1;
6094 /* Fetch socket values. */
6095 if (sp->param_flags & SPP_SACKDELAY_ENABLE) {
6096 params.sack_delay = sp->sackdelay;
6097 params.sack_freq = sp->sackfreq;
6099 params.sack_delay = 0;
6100 params.sack_freq = 1;
6104 if (copy_to_user(optval, ¶ms, len))
6107 if (put_user(len, optlen))
6113 /* 7.1.3 Initialization Parameters (SCTP_INITMSG)
6115 * Applications can specify protocol parameters for the default association
6116 * initialization. The option name argument to setsockopt() and getsockopt()
6119 * Setting initialization parameters is effective only on an unconnected
6120 * socket (for UDP-style sockets only future associations are effected
6121 * by the change). With TCP-style sockets, this option is inherited by
6122 * sockets derived from a listener socket.
6124 static int sctp_getsockopt_initmsg(struct sock *sk, int len, char __user *optval, int __user *optlen)
6126 if (len < sizeof(struct sctp_initmsg))
6128 len = sizeof(struct sctp_initmsg);
6129 if (put_user(len, optlen))
6131 if (copy_to_user(optval, &sctp_sk(sk)->initmsg, len))
6137 static int sctp_getsockopt_peer_addrs(struct sock *sk, int len,
6138 char __user *optval, int __user *optlen)
6140 struct sctp_association *asoc;
6142 struct sctp_getaddrs getaddrs;
6143 struct sctp_transport *from;
6145 union sctp_addr temp;
6146 struct sctp_sock *sp = sctp_sk(sk);
6151 if (len < sizeof(struct sctp_getaddrs))
6154 if (copy_from_user(&getaddrs, optval, sizeof(struct sctp_getaddrs)))
6157 /* For UDP-style sockets, id specifies the association to query. */
6158 asoc = sctp_id2assoc(sk, getaddrs.assoc_id);
6162 to = optval + offsetof(struct sctp_getaddrs, addrs);
6163 space_left = len - offsetof(struct sctp_getaddrs, addrs);
6165 list_for_each_entry(from, &asoc->peer.transport_addr_list,
6167 memcpy(&temp, &from->ipaddr, sizeof(temp));
6168 addrlen = sctp_get_pf_specific(sk->sk_family)
6169 ->addr_to_user(sp, &temp);
6170 if (space_left < addrlen)
6172 if (copy_to_user(to, &temp, addrlen))
6176 space_left -= addrlen;
6179 if (put_user(cnt, &((struct sctp_getaddrs __user *)optval)->addr_num))
6181 bytes_copied = ((char __user *)to) - optval;
6182 if (put_user(bytes_copied, optlen))
6188 static int sctp_copy_laddrs(struct sock *sk, __u16 port, void *to,
6189 size_t space_left, int *bytes_copied)
6191 struct sctp_sockaddr_entry *addr;
6192 union sctp_addr temp;
6195 struct net *net = sock_net(sk);
6198 list_for_each_entry_rcu(addr, &net->sctp.local_addr_list, list) {
6202 if ((PF_INET == sk->sk_family) &&
6203 (AF_INET6 == addr->a.sa.sa_family))
6205 if ((PF_INET6 == sk->sk_family) &&
6206 inet_v6_ipv6only(sk) &&
6207 (AF_INET == addr->a.sa.sa_family))
6209 memcpy(&temp, &addr->a, sizeof(temp));
6210 if (!temp.v4.sin_port)
6211 temp.v4.sin_port = htons(port);
6213 addrlen = sctp_get_pf_specific(sk->sk_family)
6214 ->addr_to_user(sctp_sk(sk), &temp);
6216 if (space_left < addrlen) {
6220 memcpy(to, &temp, addrlen);
6224 space_left -= addrlen;
6225 *bytes_copied += addrlen;
6233 static int sctp_getsockopt_local_addrs(struct sock *sk, int len,
6234 char __user *optval, int __user *optlen)
6236 struct sctp_bind_addr *bp;
6237 struct sctp_association *asoc;
6239 struct sctp_getaddrs getaddrs;
6240 struct sctp_sockaddr_entry *addr;
6242 union sctp_addr temp;
6243 struct sctp_sock *sp = sctp_sk(sk);
6247 int bytes_copied = 0;
6251 if (len < sizeof(struct sctp_getaddrs))
6254 if (copy_from_user(&getaddrs, optval, sizeof(struct sctp_getaddrs)))
6258 * For UDP-style sockets, id specifies the association to query.
6259 * If the id field is set to the value '0' then the locally bound
6260 * addresses are returned without regard to any particular
6263 if (0 == getaddrs.assoc_id) {
6264 bp = &sctp_sk(sk)->ep->base.bind_addr;
6266 asoc = sctp_id2assoc(sk, getaddrs.assoc_id);
6269 bp = &asoc->base.bind_addr;
6272 to = optval + offsetof(struct sctp_getaddrs, addrs);
6273 space_left = len - offsetof(struct sctp_getaddrs, addrs);
6275 addrs = kmalloc(space_left, GFP_USER | __GFP_NOWARN);
6279 /* If the endpoint is bound to 0.0.0.0 or ::0, get the valid
6280 * addresses from the global local address list.
6282 if (sctp_list_single_entry(&bp->address_list)) {
6283 addr = list_entry(bp->address_list.next,
6284 struct sctp_sockaddr_entry, list);
6285 if (sctp_is_any(sk, &addr->a)) {
6286 cnt = sctp_copy_laddrs(sk, bp->port, addrs,
6287 space_left, &bytes_copied);
6297 /* Protection on the bound address list is not needed since
6298 * in the socket option context we hold a socket lock and
6299 * thus the bound address list can't change.
6301 list_for_each_entry(addr, &bp->address_list, list) {
6302 memcpy(&temp, &addr->a, sizeof(temp));
6303 addrlen = sctp_get_pf_specific(sk->sk_family)
6304 ->addr_to_user(sp, &temp);
6305 if (space_left < addrlen) {
6306 err = -ENOMEM; /*fixme: right error?*/
6309 memcpy(buf, &temp, addrlen);
6311 bytes_copied += addrlen;
6313 space_left -= addrlen;
6317 if (copy_to_user(to, addrs, bytes_copied)) {
6321 if (put_user(cnt, &((struct sctp_getaddrs __user *)optval)->addr_num)) {
6325 /* XXX: We should have accounted for sizeof(struct sctp_getaddrs) too,
6326 * but we can't change it anymore.
6328 if (put_user(bytes_copied, optlen))
6335 /* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
6337 * Requests that the local SCTP stack use the enclosed peer address as
6338 * the association primary. The enclosed address must be one of the
6339 * association peer's addresses.
6341 static int sctp_getsockopt_primary_addr(struct sock *sk, int len,
6342 char __user *optval, int __user *optlen)
6344 struct sctp_prim prim;
6345 struct sctp_association *asoc;
6346 struct sctp_sock *sp = sctp_sk(sk);
6348 if (len < sizeof(struct sctp_prim))
6351 len = sizeof(struct sctp_prim);
6353 if (copy_from_user(&prim, optval, len))
6356 asoc = sctp_id2assoc(sk, prim.ssp_assoc_id);
6360 if (!asoc->peer.primary_path)
6363 memcpy(&prim.ssp_addr, &asoc->peer.primary_path->ipaddr,
6364 asoc->peer.primary_path->af_specific->sockaddr_len);
6366 sctp_get_pf_specific(sk->sk_family)->addr_to_user(sp,
6367 (union sctp_addr *)&prim.ssp_addr);
6369 if (put_user(len, optlen))
6371 if (copy_to_user(optval, &prim, len))
6378 * 7.1.11 Set Adaptation Layer Indicator (SCTP_ADAPTATION_LAYER)
6380 * Requests that the local endpoint set the specified Adaptation Layer
6381 * Indication parameter for all future INIT and INIT-ACK exchanges.
6383 static int sctp_getsockopt_adaptation_layer(struct sock *sk, int len,
6384 char __user *optval, int __user *optlen)
6386 struct sctp_setadaptation adaptation;
6388 if (len < sizeof(struct sctp_setadaptation))
6391 len = sizeof(struct sctp_setadaptation);
6393 adaptation.ssb_adaptation_ind = sctp_sk(sk)->adaptation_ind;
6395 if (put_user(len, optlen))
6397 if (copy_to_user(optval, &adaptation, len))
6405 * 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM)
6407 * Applications that wish to use the sendto() system call may wish to
6408 * specify a default set of parameters that would normally be supplied
6409 * through the inclusion of ancillary data. This socket option allows
6410 * such an application to set the default sctp_sndrcvinfo structure.
6413 * The application that wishes to use this socket option simply passes
6414 * in to this call the sctp_sndrcvinfo structure defined in Section
6415 * 5.2.2) The input parameters accepted by this call include
6416 * sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context,
6417 * sinfo_timetolive. The user must provide the sinfo_assoc_id field in
6418 * to this call if the caller is using the UDP model.
6420 * For getsockopt, it get the default sctp_sndrcvinfo structure.
6422 static int sctp_getsockopt_default_send_param(struct sock *sk,
6423 int len, char __user *optval,
6426 struct sctp_sock *sp = sctp_sk(sk);
6427 struct sctp_association *asoc;
6428 struct sctp_sndrcvinfo info;
6430 if (len < sizeof(info))
6435 if (copy_from_user(&info, optval, len))
6438 asoc = sctp_id2assoc(sk, info.sinfo_assoc_id);
6439 if (!asoc && info.sinfo_assoc_id != SCTP_FUTURE_ASSOC &&
6440 sctp_style(sk, UDP))
6444 info.sinfo_stream = asoc->default_stream;
6445 info.sinfo_flags = asoc->default_flags;
6446 info.sinfo_ppid = asoc->default_ppid;
6447 info.sinfo_context = asoc->default_context;
6448 info.sinfo_timetolive = asoc->default_timetolive;
6450 info.sinfo_stream = sp->default_stream;
6451 info.sinfo_flags = sp->default_flags;
6452 info.sinfo_ppid = sp->default_ppid;
6453 info.sinfo_context = sp->default_context;
6454 info.sinfo_timetolive = sp->default_timetolive;
6457 if (put_user(len, optlen))
6459 if (copy_to_user(optval, &info, len))
6465 /* RFC6458, Section 8.1.31. Set/get Default Send Parameters
6466 * (SCTP_DEFAULT_SNDINFO)
6468 static int sctp_getsockopt_default_sndinfo(struct sock *sk, int len,
6469 char __user *optval,
6472 struct sctp_sock *sp = sctp_sk(sk);
6473 struct sctp_association *asoc;
6474 struct sctp_sndinfo info;
6476 if (len < sizeof(info))
6481 if (copy_from_user(&info, optval, len))
6484 asoc = sctp_id2assoc(sk, info.snd_assoc_id);
6485 if (!asoc && info.snd_assoc_id != SCTP_FUTURE_ASSOC &&
6486 sctp_style(sk, UDP))
6490 info.snd_sid = asoc->default_stream;
6491 info.snd_flags = asoc->default_flags;
6492 info.snd_ppid = asoc->default_ppid;
6493 info.snd_context = asoc->default_context;
6495 info.snd_sid = sp->default_stream;
6496 info.snd_flags = sp->default_flags;
6497 info.snd_ppid = sp->default_ppid;
6498 info.snd_context = sp->default_context;
6501 if (put_user(len, optlen))
6503 if (copy_to_user(optval, &info, len))
6511 * 7.1.5 SCTP_NODELAY
6513 * Turn on/off any Nagle-like algorithm. This means that packets are
6514 * generally sent as soon as possible and no unnecessary delays are
6515 * introduced, at the cost of more packets in the network. Expects an
6516 * integer boolean flag.
6519 static int sctp_getsockopt_nodelay(struct sock *sk, int len,
6520 char __user *optval, int __user *optlen)
6524 if (len < sizeof(int))
6528 val = (sctp_sk(sk)->nodelay == 1);
6529 if (put_user(len, optlen))
6531 if (copy_to_user(optval, &val, len))
6538 * 7.1.1 SCTP_RTOINFO
6540 * The protocol parameters used to initialize and bound retransmission
6541 * timeout (RTO) are tunable. sctp_rtoinfo structure is used to access
6542 * and modify these parameters.
6543 * All parameters are time values, in milliseconds. A value of 0, when
6544 * modifying the parameters, indicates that the current value should not
6548 static int sctp_getsockopt_rtoinfo(struct sock *sk, int len,
6549 char __user *optval,
6550 int __user *optlen) {
6551 struct sctp_rtoinfo rtoinfo;
6552 struct sctp_association *asoc;
6554 if (len < sizeof (struct sctp_rtoinfo))
6557 len = sizeof(struct sctp_rtoinfo);
6559 if (copy_from_user(&rtoinfo, optval, len))
6562 asoc = sctp_id2assoc(sk, rtoinfo.srto_assoc_id);
6564 if (!asoc && rtoinfo.srto_assoc_id != SCTP_FUTURE_ASSOC &&
6565 sctp_style(sk, UDP))
6568 /* Values corresponding to the specific association. */
6570 rtoinfo.srto_initial = jiffies_to_msecs(asoc->rto_initial);
6571 rtoinfo.srto_max = jiffies_to_msecs(asoc->rto_max);
6572 rtoinfo.srto_min = jiffies_to_msecs(asoc->rto_min);
6574 /* Values corresponding to the endpoint. */
6575 struct sctp_sock *sp = sctp_sk(sk);
6577 rtoinfo.srto_initial = sp->rtoinfo.srto_initial;
6578 rtoinfo.srto_max = sp->rtoinfo.srto_max;
6579 rtoinfo.srto_min = sp->rtoinfo.srto_min;
6582 if (put_user(len, optlen))
6585 if (copy_to_user(optval, &rtoinfo, len))
6593 * 7.1.2 SCTP_ASSOCINFO
6595 * This option is used to tune the maximum retransmission attempts
6596 * of the association.
6597 * Returns an error if the new association retransmission value is
6598 * greater than the sum of the retransmission value of the peer.
6599 * See [SCTP] for more information.
6602 static int sctp_getsockopt_associnfo(struct sock *sk, int len,
6603 char __user *optval,
6607 struct sctp_assocparams assocparams;
6608 struct sctp_association *asoc;
6609 struct list_head *pos;
6612 if (len < sizeof (struct sctp_assocparams))
6615 len = sizeof(struct sctp_assocparams);
6617 if (copy_from_user(&assocparams, optval, len))
6620 asoc = sctp_id2assoc(sk, assocparams.sasoc_assoc_id);
6622 if (!asoc && assocparams.sasoc_assoc_id != SCTP_FUTURE_ASSOC &&
6623 sctp_style(sk, UDP))
6626 /* Values correspoinding to the specific association */
6628 assocparams.sasoc_asocmaxrxt = asoc->max_retrans;
6629 assocparams.sasoc_peer_rwnd = asoc->peer.rwnd;
6630 assocparams.sasoc_local_rwnd = asoc->a_rwnd;
6631 assocparams.sasoc_cookie_life = ktime_to_ms(asoc->cookie_life);
6633 list_for_each(pos, &asoc->peer.transport_addr_list) {
6637 assocparams.sasoc_number_peer_destinations = cnt;
6639 /* Values corresponding to the endpoint */
6640 struct sctp_sock *sp = sctp_sk(sk);
6642 assocparams.sasoc_asocmaxrxt = sp->assocparams.sasoc_asocmaxrxt;
6643 assocparams.sasoc_peer_rwnd = sp->assocparams.sasoc_peer_rwnd;
6644 assocparams.sasoc_local_rwnd = sp->assocparams.sasoc_local_rwnd;
6645 assocparams.sasoc_cookie_life =
6646 sp->assocparams.sasoc_cookie_life;
6647 assocparams.sasoc_number_peer_destinations =
6649 sasoc_number_peer_destinations;
6652 if (put_user(len, optlen))
6655 if (copy_to_user(optval, &assocparams, len))
6662 * 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR)
6664 * This socket option is a boolean flag which turns on or off mapped V4
6665 * addresses. If this option is turned on and the socket is type
6666 * PF_INET6, then IPv4 addresses will be mapped to V6 representation.
6667 * If this option is turned off, then no mapping will be done of V4
6668 * addresses and a user will receive both PF_INET6 and PF_INET type
6669 * addresses on the socket.
6671 static int sctp_getsockopt_mappedv4(struct sock *sk, int len,
6672 char __user *optval, int __user *optlen)
6675 struct sctp_sock *sp = sctp_sk(sk);
6677 if (len < sizeof(int))
6682 if (put_user(len, optlen))
6684 if (copy_to_user(optval, &val, len))
6691 * 7.1.29. Set or Get the default context (SCTP_CONTEXT)
6692 * (chapter and verse is quoted at sctp_setsockopt_context())
6694 static int sctp_getsockopt_context(struct sock *sk, int len,
6695 char __user *optval, int __user *optlen)
6697 struct sctp_assoc_value params;
6698 struct sctp_association *asoc;
6700 if (len < sizeof(struct sctp_assoc_value))
6703 len = sizeof(struct sctp_assoc_value);
6705 if (copy_from_user(¶ms, optval, len))
6708 asoc = sctp_id2assoc(sk, params.assoc_id);
6709 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
6710 sctp_style(sk, UDP))
6713 params.assoc_value = asoc ? asoc->default_rcv_context
6714 : sctp_sk(sk)->default_rcv_context;
6716 if (put_user(len, optlen))
6718 if (copy_to_user(optval, ¶ms, len))
6725 * 8.1.16. Get or Set the Maximum Fragmentation Size (SCTP_MAXSEG)
6726 * This option will get or set the maximum size to put in any outgoing
6727 * SCTP DATA chunk. If a message is larger than this size it will be
6728 * fragmented by SCTP into the specified size. Note that the underlying
6729 * SCTP implementation may fragment into smaller sized chunks when the
6730 * PMTU of the underlying association is smaller than the value set by
6731 * the user. The default value for this option is '0' which indicates
6732 * the user is NOT limiting fragmentation and only the PMTU will effect
6733 * SCTP's choice of DATA chunk size. Note also that values set larger
6734 * than the maximum size of an IP datagram will effectively let SCTP
6735 * control fragmentation (i.e. the same as setting this option to 0).
6737 * The following structure is used to access and modify this parameter:
6739 * struct sctp_assoc_value {
6740 * sctp_assoc_t assoc_id;
6741 * uint32_t assoc_value;
6744 * assoc_id: This parameter is ignored for one-to-one style sockets.
6745 * For one-to-many style sockets this parameter indicates which
6746 * association the user is performing an action upon. Note that if
6747 * this field's value is zero then the endpoints default value is
6748 * changed (effecting future associations only).
6749 * assoc_value: This parameter specifies the maximum size in bytes.
6751 static int sctp_getsockopt_maxseg(struct sock *sk, int len,
6752 char __user *optval, int __user *optlen)
6754 struct sctp_assoc_value params;
6755 struct sctp_association *asoc;
6757 if (len == sizeof(int)) {
6758 pr_warn_ratelimited(DEPRECATED
6760 "Use of int in maxseg socket option.\n"
6761 "Use struct sctp_assoc_value instead\n",
6762 current->comm, task_pid_nr(current));
6763 params.assoc_id = SCTP_FUTURE_ASSOC;
6764 } else if (len >= sizeof(struct sctp_assoc_value)) {
6765 len = sizeof(struct sctp_assoc_value);
6766 if (copy_from_user(¶ms, optval, len))
6771 asoc = sctp_id2assoc(sk, params.assoc_id);
6772 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
6773 sctp_style(sk, UDP))
6777 params.assoc_value = asoc->frag_point;
6779 params.assoc_value = sctp_sk(sk)->user_frag;
6781 if (put_user(len, optlen))
6783 if (len == sizeof(int)) {
6784 if (copy_to_user(optval, ¶ms.assoc_value, len))
6787 if (copy_to_user(optval, ¶ms, len))
6795 * 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE)
6796 * (chapter and verse is quoted at sctp_setsockopt_fragment_interleave())
6798 static int sctp_getsockopt_fragment_interleave(struct sock *sk, int len,
6799 char __user *optval, int __user *optlen)
6803 if (len < sizeof(int))
6808 val = sctp_sk(sk)->frag_interleave;
6809 if (put_user(len, optlen))
6811 if (copy_to_user(optval, &val, len))
6818 * 7.1.25. Set or Get the sctp partial delivery point
6819 * (chapter and verse is quoted at sctp_setsockopt_partial_delivery_point())
6821 static int sctp_getsockopt_partial_delivery_point(struct sock *sk, int len,
6822 char __user *optval,
6827 if (len < sizeof(u32))
6832 val = sctp_sk(sk)->pd_point;
6833 if (put_user(len, optlen))
6835 if (copy_to_user(optval, &val, len))
6842 * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST)
6843 * (chapter and verse is quoted at sctp_setsockopt_maxburst())
6845 static int sctp_getsockopt_maxburst(struct sock *sk, int len,
6846 char __user *optval,
6849 struct sctp_assoc_value params;
6850 struct sctp_association *asoc;
6852 if (len == sizeof(int)) {
6853 pr_warn_ratelimited(DEPRECATED
6855 "Use of int in max_burst socket option.\n"
6856 "Use struct sctp_assoc_value instead\n",
6857 current->comm, task_pid_nr(current));
6858 params.assoc_id = SCTP_FUTURE_ASSOC;
6859 } else if (len >= sizeof(struct sctp_assoc_value)) {
6860 len = sizeof(struct sctp_assoc_value);
6861 if (copy_from_user(¶ms, optval, len))
6866 asoc = sctp_id2assoc(sk, params.assoc_id);
6867 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
6868 sctp_style(sk, UDP))
6871 params.assoc_value = asoc ? asoc->max_burst : sctp_sk(sk)->max_burst;
6873 if (len == sizeof(int)) {
6874 if (copy_to_user(optval, ¶ms.assoc_value, len))
6877 if (copy_to_user(optval, ¶ms, len))
6885 static int sctp_getsockopt_hmac_ident(struct sock *sk, int len,
6886 char __user *optval, int __user *optlen)
6888 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
6889 struct sctp_hmacalgo __user *p = (void __user *)optval;
6890 struct sctp_hmac_algo_param *hmacs;
6895 if (!ep->auth_enable)
6898 hmacs = ep->auth_hmacs_list;
6899 data_len = ntohs(hmacs->param_hdr.length) -
6900 sizeof(struct sctp_paramhdr);
6902 if (len < sizeof(struct sctp_hmacalgo) + data_len)
6905 len = sizeof(struct sctp_hmacalgo) + data_len;
6906 num_idents = data_len / sizeof(u16);
6908 if (put_user(len, optlen))
6910 if (put_user(num_idents, &p->shmac_num_idents))
6912 for (i = 0; i < num_idents; i++) {
6913 __u16 hmacid = ntohs(hmacs->hmac_ids[i]);
6915 if (copy_to_user(&p->shmac_idents[i], &hmacid, sizeof(__u16)))
6921 static int sctp_getsockopt_active_key(struct sock *sk, int len,
6922 char __user *optval, int __user *optlen)
6924 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
6925 struct sctp_authkeyid val;
6926 struct sctp_association *asoc;
6928 if (len < sizeof(struct sctp_authkeyid))
6931 len = sizeof(struct sctp_authkeyid);
6932 if (copy_from_user(&val, optval, len))
6935 asoc = sctp_id2assoc(sk, val.scact_assoc_id);
6936 if (!asoc && val.scact_assoc_id && sctp_style(sk, UDP))
6940 if (!asoc->peer.auth_capable)
6942 val.scact_keynumber = asoc->active_key_id;
6944 if (!ep->auth_enable)
6946 val.scact_keynumber = ep->active_key_id;
6949 if (put_user(len, optlen))
6951 if (copy_to_user(optval, &val, len))
6957 static int sctp_getsockopt_peer_auth_chunks(struct sock *sk, int len,
6958 char __user *optval, int __user *optlen)
6960 struct sctp_authchunks __user *p = (void __user *)optval;
6961 struct sctp_authchunks val;
6962 struct sctp_association *asoc;
6963 struct sctp_chunks_param *ch;
6967 if (len < sizeof(struct sctp_authchunks))
6970 if (copy_from_user(&val, optval, sizeof(val)))
6973 to = p->gauth_chunks;
6974 asoc = sctp_id2assoc(sk, val.gauth_assoc_id);
6978 if (!asoc->peer.auth_capable)
6981 ch = asoc->peer.peer_chunks;
6985 /* See if the user provided enough room for all the data */
6986 num_chunks = ntohs(ch->param_hdr.length) - sizeof(struct sctp_paramhdr);
6987 if (len < num_chunks)
6990 if (copy_to_user(to, ch->chunks, num_chunks))
6993 len = sizeof(struct sctp_authchunks) + num_chunks;
6994 if (put_user(len, optlen))
6996 if (put_user(num_chunks, &p->gauth_number_of_chunks))
7001 static int sctp_getsockopt_local_auth_chunks(struct sock *sk, int len,
7002 char __user *optval, int __user *optlen)
7004 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
7005 struct sctp_authchunks __user *p = (void __user *)optval;
7006 struct sctp_authchunks val;
7007 struct sctp_association *asoc;
7008 struct sctp_chunks_param *ch;
7012 if (len < sizeof(struct sctp_authchunks))
7015 if (copy_from_user(&val, optval, sizeof(val)))
7018 to = p->gauth_chunks;
7019 asoc = sctp_id2assoc(sk, val.gauth_assoc_id);
7020 if (!asoc && val.gauth_assoc_id != SCTP_FUTURE_ASSOC &&
7021 sctp_style(sk, UDP))
7025 if (!asoc->peer.auth_capable)
7027 ch = (struct sctp_chunks_param *)asoc->c.auth_chunks;
7029 if (!ep->auth_enable)
7031 ch = ep->auth_chunk_list;
7036 num_chunks = ntohs(ch->param_hdr.length) - sizeof(struct sctp_paramhdr);
7037 if (len < sizeof(struct sctp_authchunks) + num_chunks)
7040 if (copy_to_user(to, ch->chunks, num_chunks))
7043 len = sizeof(struct sctp_authchunks) + num_chunks;
7044 if (put_user(len, optlen))
7046 if (put_user(num_chunks, &p->gauth_number_of_chunks))
7053 * 8.2.5. Get the Current Number of Associations (SCTP_GET_ASSOC_NUMBER)
7054 * This option gets the current number of associations that are attached
7055 * to a one-to-many style socket. The option value is an uint32_t.
7057 static int sctp_getsockopt_assoc_number(struct sock *sk, int len,
7058 char __user *optval, int __user *optlen)
7060 struct sctp_sock *sp = sctp_sk(sk);
7061 struct sctp_association *asoc;
7064 if (sctp_style(sk, TCP))
7067 if (len < sizeof(u32))
7072 list_for_each_entry(asoc, &(sp->ep->asocs), asocs) {
7076 if (put_user(len, optlen))
7078 if (copy_to_user(optval, &val, len))
7085 * 8.1.23 SCTP_AUTO_ASCONF
7086 * See the corresponding setsockopt entry as description
7088 static int sctp_getsockopt_auto_asconf(struct sock *sk, int len,
7089 char __user *optval, int __user *optlen)
7093 if (len < sizeof(int))
7097 if (sctp_sk(sk)->do_auto_asconf && sctp_is_ep_boundall(sk))
7099 if (put_user(len, optlen))
7101 if (copy_to_user(optval, &val, len))
7107 * 8.2.6. Get the Current Identifiers of Associations
7108 * (SCTP_GET_ASSOC_ID_LIST)
7110 * This option gets the current list of SCTP association identifiers of
7111 * the SCTP associations handled by a one-to-many style socket.
7113 static int sctp_getsockopt_assoc_ids(struct sock *sk, int len,
7114 char __user *optval, int __user *optlen)
7116 struct sctp_sock *sp = sctp_sk(sk);
7117 struct sctp_association *asoc;
7118 struct sctp_assoc_ids *ids;
7121 if (sctp_style(sk, TCP))
7124 if (len < sizeof(struct sctp_assoc_ids))
7127 list_for_each_entry(asoc, &(sp->ep->asocs), asocs) {
7131 if (len < sizeof(struct sctp_assoc_ids) + sizeof(sctp_assoc_t) * num)
7134 len = sizeof(struct sctp_assoc_ids) + sizeof(sctp_assoc_t) * num;
7136 ids = kmalloc(len, GFP_USER | __GFP_NOWARN);
7140 ids->gaids_number_of_ids = num;
7142 list_for_each_entry(asoc, &(sp->ep->asocs), asocs) {
7143 ids->gaids_assoc_id[num++] = asoc->assoc_id;
7146 if (put_user(len, optlen) || copy_to_user(optval, ids, len)) {
7156 * SCTP_PEER_ADDR_THLDS
7158 * This option allows us to fetch the partially failed threshold for one or all
7159 * transports in an association. See Section 6.1 of:
7160 * http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txt
7162 static int sctp_getsockopt_paddr_thresholds(struct sock *sk,
7163 char __user *optval, int len,
7164 int __user *optlen, bool v2)
7166 struct sctp_paddrthlds_v2 val;
7167 struct sctp_transport *trans;
7168 struct sctp_association *asoc;
7171 min = v2 ? sizeof(val) : sizeof(struct sctp_paddrthlds);
7175 if (copy_from_user(&val, optval, len))
7178 if (!sctp_is_any(sk, (const union sctp_addr *)&val.spt_address)) {
7179 trans = sctp_addr_id2transport(sk, &val.spt_address,
7184 val.spt_pathmaxrxt = trans->pathmaxrxt;
7185 val.spt_pathpfthld = trans->pf_retrans;
7186 val.spt_pathcpthld = trans->ps_retrans;
7191 asoc = sctp_id2assoc(sk, val.spt_assoc_id);
7192 if (!asoc && val.spt_assoc_id != SCTP_FUTURE_ASSOC &&
7193 sctp_style(sk, UDP))
7197 val.spt_pathpfthld = asoc->pf_retrans;
7198 val.spt_pathmaxrxt = asoc->pathmaxrxt;
7199 val.spt_pathcpthld = asoc->ps_retrans;
7201 struct sctp_sock *sp = sctp_sk(sk);
7203 val.spt_pathpfthld = sp->pf_retrans;
7204 val.spt_pathmaxrxt = sp->pathmaxrxt;
7205 val.spt_pathcpthld = sp->ps_retrans;
7209 if (put_user(len, optlen) || copy_to_user(optval, &val, len))
7216 * SCTP_GET_ASSOC_STATS
7218 * This option retrieves local per endpoint statistics. It is modeled
7219 * after OpenSolaris' implementation
7221 static int sctp_getsockopt_assoc_stats(struct sock *sk, int len,
7222 char __user *optval,
7225 struct sctp_assoc_stats sas;
7226 struct sctp_association *asoc = NULL;
7228 /* User must provide at least the assoc id */
7229 if (len < sizeof(sctp_assoc_t))
7232 /* Allow the struct to grow and fill in as much as possible */
7233 len = min_t(size_t, len, sizeof(sas));
7235 if (copy_from_user(&sas, optval, len))
7238 asoc = sctp_id2assoc(sk, sas.sas_assoc_id);
7242 sas.sas_rtxchunks = asoc->stats.rtxchunks;
7243 sas.sas_gapcnt = asoc->stats.gapcnt;
7244 sas.sas_outofseqtsns = asoc->stats.outofseqtsns;
7245 sas.sas_osacks = asoc->stats.osacks;
7246 sas.sas_isacks = asoc->stats.isacks;
7247 sas.sas_octrlchunks = asoc->stats.octrlchunks;
7248 sas.sas_ictrlchunks = asoc->stats.ictrlchunks;
7249 sas.sas_oodchunks = asoc->stats.oodchunks;
7250 sas.sas_iodchunks = asoc->stats.iodchunks;
7251 sas.sas_ouodchunks = asoc->stats.ouodchunks;
7252 sas.sas_iuodchunks = asoc->stats.iuodchunks;
7253 sas.sas_idupchunks = asoc->stats.idupchunks;
7254 sas.sas_opackets = asoc->stats.opackets;
7255 sas.sas_ipackets = asoc->stats.ipackets;
7257 /* New high max rto observed, will return 0 if not a single
7258 * RTO update took place. obs_rto_ipaddr will be bogus
7261 sas.sas_maxrto = asoc->stats.max_obs_rto;
7262 memcpy(&sas.sas_obs_rto_ipaddr, &asoc->stats.obs_rto_ipaddr,
7263 sizeof(struct sockaddr_storage));
7265 /* Mark beginning of a new observation period */
7266 asoc->stats.max_obs_rto = asoc->rto_min;
7268 if (put_user(len, optlen))
7271 pr_debug("%s: len:%d, assoc_id:%d\n", __func__, len, sas.sas_assoc_id);
7273 if (copy_to_user(optval, &sas, len))
7279 static int sctp_getsockopt_recvrcvinfo(struct sock *sk, int len,
7280 char __user *optval,
7285 if (len < sizeof(int))
7289 if (sctp_sk(sk)->recvrcvinfo)
7291 if (put_user(len, optlen))
7293 if (copy_to_user(optval, &val, len))
7299 static int sctp_getsockopt_recvnxtinfo(struct sock *sk, int len,
7300 char __user *optval,
7305 if (len < sizeof(int))
7309 if (sctp_sk(sk)->recvnxtinfo)
7311 if (put_user(len, optlen))
7313 if (copy_to_user(optval, &val, len))
7319 static int sctp_getsockopt_pr_supported(struct sock *sk, int len,
7320 char __user *optval,
7323 struct sctp_assoc_value params;
7324 struct sctp_association *asoc;
7325 int retval = -EFAULT;
7327 if (len < sizeof(params)) {
7332 len = sizeof(params);
7333 if (copy_from_user(¶ms, optval, len))
7336 asoc = sctp_id2assoc(sk, params.assoc_id);
7337 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7338 sctp_style(sk, UDP)) {
7343 params.assoc_value = asoc ? asoc->peer.prsctp_capable
7344 : sctp_sk(sk)->ep->prsctp_enable;
7346 if (put_user(len, optlen))
7349 if (copy_to_user(optval, ¶ms, len))
7358 static int sctp_getsockopt_default_prinfo(struct sock *sk, int len,
7359 char __user *optval,
7362 struct sctp_default_prinfo info;
7363 struct sctp_association *asoc;
7364 int retval = -EFAULT;
7366 if (len < sizeof(info)) {
7372 if (copy_from_user(&info, optval, len))
7375 asoc = sctp_id2assoc(sk, info.pr_assoc_id);
7376 if (!asoc && info.pr_assoc_id != SCTP_FUTURE_ASSOC &&
7377 sctp_style(sk, UDP)) {
7383 info.pr_policy = SCTP_PR_POLICY(asoc->default_flags);
7384 info.pr_value = asoc->default_timetolive;
7386 struct sctp_sock *sp = sctp_sk(sk);
7388 info.pr_policy = SCTP_PR_POLICY(sp->default_flags);
7389 info.pr_value = sp->default_timetolive;
7392 if (put_user(len, optlen))
7395 if (copy_to_user(optval, &info, len))
7404 static int sctp_getsockopt_pr_assocstatus(struct sock *sk, int len,
7405 char __user *optval,
7408 struct sctp_prstatus params;
7409 struct sctp_association *asoc;
7411 int retval = -EINVAL;
7413 if (len < sizeof(params))
7416 len = sizeof(params);
7417 if (copy_from_user(¶ms, optval, len)) {
7422 policy = params.sprstat_policy;
7423 if (!policy || (policy & ~(SCTP_PR_SCTP_MASK | SCTP_PR_SCTP_ALL)) ||
7424 ((policy & SCTP_PR_SCTP_ALL) && (policy & SCTP_PR_SCTP_MASK)))
7427 asoc = sctp_id2assoc(sk, params.sprstat_assoc_id);
7431 if (policy == SCTP_PR_SCTP_ALL) {
7432 params.sprstat_abandoned_unsent = 0;
7433 params.sprstat_abandoned_sent = 0;
7434 for (policy = 0; policy <= SCTP_PR_INDEX(MAX); policy++) {
7435 params.sprstat_abandoned_unsent +=
7436 asoc->abandoned_unsent[policy];
7437 params.sprstat_abandoned_sent +=
7438 asoc->abandoned_sent[policy];
7441 params.sprstat_abandoned_unsent =
7442 asoc->abandoned_unsent[__SCTP_PR_INDEX(policy)];
7443 params.sprstat_abandoned_sent =
7444 asoc->abandoned_sent[__SCTP_PR_INDEX(policy)];
7447 if (put_user(len, optlen)) {
7452 if (copy_to_user(optval, ¶ms, len)) {
7463 static int sctp_getsockopt_pr_streamstatus(struct sock *sk, int len,
7464 char __user *optval,
7467 struct sctp_stream_out_ext *streamoute;
7468 struct sctp_association *asoc;
7469 struct sctp_prstatus params;
7470 int retval = -EINVAL;
7473 if (len < sizeof(params))
7476 len = sizeof(params);
7477 if (copy_from_user(¶ms, optval, len)) {
7482 policy = params.sprstat_policy;
7483 if (!policy || (policy & ~(SCTP_PR_SCTP_MASK | SCTP_PR_SCTP_ALL)) ||
7484 ((policy & SCTP_PR_SCTP_ALL) && (policy & SCTP_PR_SCTP_MASK)))
7487 asoc = sctp_id2assoc(sk, params.sprstat_assoc_id);
7488 if (!asoc || params.sprstat_sid >= asoc->stream.outcnt)
7491 streamoute = SCTP_SO(&asoc->stream, params.sprstat_sid)->ext;
7493 /* Not allocated yet, means all stats are 0 */
7494 params.sprstat_abandoned_unsent = 0;
7495 params.sprstat_abandoned_sent = 0;
7500 if (policy == SCTP_PR_SCTP_ALL) {
7501 params.sprstat_abandoned_unsent = 0;
7502 params.sprstat_abandoned_sent = 0;
7503 for (policy = 0; policy <= SCTP_PR_INDEX(MAX); policy++) {
7504 params.sprstat_abandoned_unsent +=
7505 streamoute->abandoned_unsent[policy];
7506 params.sprstat_abandoned_sent +=
7507 streamoute->abandoned_sent[policy];
7510 params.sprstat_abandoned_unsent =
7511 streamoute->abandoned_unsent[__SCTP_PR_INDEX(policy)];
7512 params.sprstat_abandoned_sent =
7513 streamoute->abandoned_sent[__SCTP_PR_INDEX(policy)];
7516 if (put_user(len, optlen) || copy_to_user(optval, ¶ms, len)) {
7527 static int sctp_getsockopt_reconfig_supported(struct sock *sk, int len,
7528 char __user *optval,
7531 struct sctp_assoc_value params;
7532 struct sctp_association *asoc;
7533 int retval = -EFAULT;
7535 if (len < sizeof(params)) {
7540 len = sizeof(params);
7541 if (copy_from_user(¶ms, optval, len))
7544 asoc = sctp_id2assoc(sk, params.assoc_id);
7545 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7546 sctp_style(sk, UDP)) {
7551 params.assoc_value = asoc ? asoc->peer.reconf_capable
7552 : sctp_sk(sk)->ep->reconf_enable;
7554 if (put_user(len, optlen))
7557 if (copy_to_user(optval, ¶ms, len))
7566 static int sctp_getsockopt_enable_strreset(struct sock *sk, int len,
7567 char __user *optval,
7570 struct sctp_assoc_value params;
7571 struct sctp_association *asoc;
7572 int retval = -EFAULT;
7574 if (len < sizeof(params)) {
7579 len = sizeof(params);
7580 if (copy_from_user(¶ms, optval, len))
7583 asoc = sctp_id2assoc(sk, params.assoc_id);
7584 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7585 sctp_style(sk, UDP)) {
7590 params.assoc_value = asoc ? asoc->strreset_enable
7591 : sctp_sk(sk)->ep->strreset_enable;
7593 if (put_user(len, optlen))
7596 if (copy_to_user(optval, ¶ms, len))
7605 static int sctp_getsockopt_scheduler(struct sock *sk, int len,
7606 char __user *optval,
7609 struct sctp_assoc_value params;
7610 struct sctp_association *asoc;
7611 int retval = -EFAULT;
7613 if (len < sizeof(params)) {
7618 len = sizeof(params);
7619 if (copy_from_user(¶ms, optval, len))
7622 asoc = sctp_id2assoc(sk, params.assoc_id);
7623 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7624 sctp_style(sk, UDP)) {
7629 params.assoc_value = asoc ? sctp_sched_get_sched(asoc)
7630 : sctp_sk(sk)->default_ss;
7632 if (put_user(len, optlen))
7635 if (copy_to_user(optval, ¶ms, len))
7644 static int sctp_getsockopt_scheduler_value(struct sock *sk, int len,
7645 char __user *optval,
7648 struct sctp_stream_value params;
7649 struct sctp_association *asoc;
7650 int retval = -EFAULT;
7652 if (len < sizeof(params)) {
7657 len = sizeof(params);
7658 if (copy_from_user(¶ms, optval, len))
7661 asoc = sctp_id2assoc(sk, params.assoc_id);
7667 retval = sctp_sched_get_value(asoc, params.stream_id,
7668 ¶ms.stream_value);
7672 if (put_user(len, optlen)) {
7677 if (copy_to_user(optval, ¶ms, len)) {
7686 static int sctp_getsockopt_interleaving_supported(struct sock *sk, int len,
7687 char __user *optval,
7690 struct sctp_assoc_value params;
7691 struct sctp_association *asoc;
7692 int retval = -EFAULT;
7694 if (len < sizeof(params)) {
7699 len = sizeof(params);
7700 if (copy_from_user(¶ms, optval, len))
7703 asoc = sctp_id2assoc(sk, params.assoc_id);
7704 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7705 sctp_style(sk, UDP)) {
7710 params.assoc_value = asoc ? asoc->peer.intl_capable
7711 : sctp_sk(sk)->ep->intl_enable;
7713 if (put_user(len, optlen))
7716 if (copy_to_user(optval, ¶ms, len))
7725 static int sctp_getsockopt_reuse_port(struct sock *sk, int len,
7726 char __user *optval,
7731 if (len < sizeof(int))
7735 val = sctp_sk(sk)->reuse;
7736 if (put_user(len, optlen))
7739 if (copy_to_user(optval, &val, len))
7745 static int sctp_getsockopt_event(struct sock *sk, int len, char __user *optval,
7748 struct sctp_association *asoc;
7749 struct sctp_event param;
7752 if (len < sizeof(param))
7755 len = sizeof(param);
7756 if (copy_from_user(¶m, optval, len))
7759 if (param.se_type < SCTP_SN_TYPE_BASE ||
7760 param.se_type > SCTP_SN_TYPE_MAX)
7763 asoc = sctp_id2assoc(sk, param.se_assoc_id);
7764 if (!asoc && param.se_assoc_id != SCTP_FUTURE_ASSOC &&
7765 sctp_style(sk, UDP))
7768 subscribe = asoc ? asoc->subscribe : sctp_sk(sk)->subscribe;
7769 param.se_on = sctp_ulpevent_type_enabled(subscribe, param.se_type);
7771 if (put_user(len, optlen))
7774 if (copy_to_user(optval, ¶m, len))
7780 static int sctp_getsockopt_asconf_supported(struct sock *sk, int len,
7781 char __user *optval,
7784 struct sctp_assoc_value params;
7785 struct sctp_association *asoc;
7786 int retval = -EFAULT;
7788 if (len < sizeof(params)) {
7793 len = sizeof(params);
7794 if (copy_from_user(¶ms, optval, len))
7797 asoc = sctp_id2assoc(sk, params.assoc_id);
7798 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7799 sctp_style(sk, UDP)) {
7804 params.assoc_value = asoc ? asoc->peer.asconf_capable
7805 : sctp_sk(sk)->ep->asconf_enable;
7807 if (put_user(len, optlen))
7810 if (copy_to_user(optval, ¶ms, len))
7819 static int sctp_getsockopt_auth_supported(struct sock *sk, int len,
7820 char __user *optval,
7823 struct sctp_assoc_value params;
7824 struct sctp_association *asoc;
7825 int retval = -EFAULT;
7827 if (len < sizeof(params)) {
7832 len = sizeof(params);
7833 if (copy_from_user(¶ms, optval, len))
7836 asoc = sctp_id2assoc(sk, params.assoc_id);
7837 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7838 sctp_style(sk, UDP)) {
7843 params.assoc_value = asoc ? asoc->peer.auth_capable
7844 : sctp_sk(sk)->ep->auth_enable;
7846 if (put_user(len, optlen))
7849 if (copy_to_user(optval, ¶ms, len))
7858 static int sctp_getsockopt_ecn_supported(struct sock *sk, int len,
7859 char __user *optval,
7862 struct sctp_assoc_value params;
7863 struct sctp_association *asoc;
7864 int retval = -EFAULT;
7866 if (len < sizeof(params)) {
7871 len = sizeof(params);
7872 if (copy_from_user(¶ms, optval, len))
7875 asoc = sctp_id2assoc(sk, params.assoc_id);
7876 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7877 sctp_style(sk, UDP)) {
7882 params.assoc_value = asoc ? asoc->peer.ecn_capable
7883 : sctp_sk(sk)->ep->ecn_enable;
7885 if (put_user(len, optlen))
7888 if (copy_to_user(optval, ¶ms, len))
7897 static int sctp_getsockopt_pf_expose(struct sock *sk, int len,
7898 char __user *optval,
7901 struct sctp_assoc_value params;
7902 struct sctp_association *asoc;
7903 int retval = -EFAULT;
7905 if (len < sizeof(params)) {
7910 len = sizeof(params);
7911 if (copy_from_user(¶ms, optval, len))
7914 asoc = sctp_id2assoc(sk, params.assoc_id);
7915 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7916 sctp_style(sk, UDP)) {
7921 params.assoc_value = asoc ? asoc->pf_expose
7922 : sctp_sk(sk)->pf_expose;
7924 if (put_user(len, optlen))
7927 if (copy_to_user(optval, ¶ms, len))
7936 static int sctp_getsockopt_encap_port(struct sock *sk, int len,
7937 char __user *optval, int __user *optlen)
7939 struct sctp_association *asoc;
7940 struct sctp_udpencaps encap;
7941 struct sctp_transport *t;
7944 if (len < sizeof(encap))
7947 len = sizeof(encap);
7948 if (copy_from_user(&encap, optval, len))
7951 /* If an address other than INADDR_ANY is specified, and
7952 * no transport is found, then the request is invalid.
7954 if (!sctp_is_any(sk, (union sctp_addr *)&encap.sue_address)) {
7955 t = sctp_addr_id2transport(sk, &encap.sue_address,
7956 encap.sue_assoc_id);
7958 pr_debug("%s: failed no transport\n", __func__);
7962 encap_port = t->encap_port;
7966 /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
7967 * socket is a one to many style socket, and an association
7968 * was not found, then the id was invalid.
7970 asoc = sctp_id2assoc(sk, encap.sue_assoc_id);
7971 if (!asoc && encap.sue_assoc_id != SCTP_FUTURE_ASSOC &&
7972 sctp_style(sk, UDP)) {
7973 pr_debug("%s: failed no association\n", __func__);
7978 encap_port = asoc->encap_port;
7982 encap_port = sctp_sk(sk)->encap_port;
7985 encap.sue_port = (__force uint16_t)encap_port;
7986 if (copy_to_user(optval, &encap, len))
7989 if (put_user(len, optlen))
7995 static int sctp_getsockopt_probe_interval(struct sock *sk, int len,
7996 char __user *optval,
7999 struct sctp_probeinterval params;
8000 struct sctp_association *asoc;
8001 struct sctp_transport *t;
8002 __u32 probe_interval;
8004 if (len < sizeof(params))
8007 len = sizeof(params);
8008 if (copy_from_user(¶ms, optval, len))
8011 /* If an address other than INADDR_ANY is specified, and
8012 * no transport is found, then the request is invalid.
8014 if (!sctp_is_any(sk, (union sctp_addr *)¶ms.spi_address)) {
8015 t = sctp_addr_id2transport(sk, ¶ms.spi_address,
8016 params.spi_assoc_id);
8018 pr_debug("%s: failed no transport\n", __func__);
8022 probe_interval = jiffies_to_msecs(t->probe_interval);
8026 /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
8027 * socket is a one to many style socket, and an association
8028 * was not found, then the id was invalid.
8030 asoc = sctp_id2assoc(sk, params.spi_assoc_id);
8031 if (!asoc && params.spi_assoc_id != SCTP_FUTURE_ASSOC &&
8032 sctp_style(sk, UDP)) {
8033 pr_debug("%s: failed no association\n", __func__);
8038 probe_interval = jiffies_to_msecs(asoc->probe_interval);
8042 probe_interval = sctp_sk(sk)->probe_interval;
8045 params.spi_interval = probe_interval;
8046 if (copy_to_user(optval, ¶ms, len))
8049 if (put_user(len, optlen))
8055 static int sctp_getsockopt(struct sock *sk, int level, int optname,
8056 char __user *optval, int __user *optlen)
8061 pr_debug("%s: sk:%p, optname:%d\n", __func__, sk, optname);
8063 /* I can hardly begin to describe how wrong this is. This is
8064 * so broken as to be worse than useless. The API draft
8065 * REALLY is NOT helpful here... I am not convinced that the
8066 * semantics of getsockopt() with a level OTHER THAN SOL_SCTP
8067 * are at all well-founded.
8069 if (level != SOL_SCTP) {
8070 struct sctp_af *af = sctp_sk(sk)->pf->af;
8072 retval = af->getsockopt(sk, level, optname, optval, optlen);
8076 if (get_user(len, optlen))
8086 retval = sctp_getsockopt_sctp_status(sk, len, optval, optlen);
8088 case SCTP_DISABLE_FRAGMENTS:
8089 retval = sctp_getsockopt_disable_fragments(sk, len, optval,
8093 retval = sctp_getsockopt_events(sk, len, optval, optlen);
8095 case SCTP_AUTOCLOSE:
8096 retval = sctp_getsockopt_autoclose(sk, len, optval, optlen);
8098 case SCTP_SOCKOPT_PEELOFF:
8099 retval = sctp_getsockopt_peeloff(sk, len, optval, optlen);
8101 case SCTP_SOCKOPT_PEELOFF_FLAGS:
8102 retval = sctp_getsockopt_peeloff_flags(sk, len, optval, optlen);
8104 case SCTP_PEER_ADDR_PARAMS:
8105 retval = sctp_getsockopt_peer_addr_params(sk, len, optval,
8108 case SCTP_DELAYED_SACK:
8109 retval = sctp_getsockopt_delayed_ack(sk, len, optval,
8113 retval = sctp_getsockopt_initmsg(sk, len, optval, optlen);
8115 case SCTP_GET_PEER_ADDRS:
8116 retval = sctp_getsockopt_peer_addrs(sk, len, optval,
8119 case SCTP_GET_LOCAL_ADDRS:
8120 retval = sctp_getsockopt_local_addrs(sk, len, optval,
8123 case SCTP_SOCKOPT_CONNECTX3:
8124 retval = sctp_getsockopt_connectx3(sk, len, optval, optlen);
8126 case SCTP_DEFAULT_SEND_PARAM:
8127 retval = sctp_getsockopt_default_send_param(sk, len,
8130 case SCTP_DEFAULT_SNDINFO:
8131 retval = sctp_getsockopt_default_sndinfo(sk, len,
8134 case SCTP_PRIMARY_ADDR:
8135 retval = sctp_getsockopt_primary_addr(sk, len, optval, optlen);
8138 retval = sctp_getsockopt_nodelay(sk, len, optval, optlen);
8141 retval = sctp_getsockopt_rtoinfo(sk, len, optval, optlen);
8143 case SCTP_ASSOCINFO:
8144 retval = sctp_getsockopt_associnfo(sk, len, optval, optlen);
8146 case SCTP_I_WANT_MAPPED_V4_ADDR:
8147 retval = sctp_getsockopt_mappedv4(sk, len, optval, optlen);
8150 retval = sctp_getsockopt_maxseg(sk, len, optval, optlen);
8152 case SCTP_GET_PEER_ADDR_INFO:
8153 retval = sctp_getsockopt_peer_addr_info(sk, len, optval,
8156 case SCTP_ADAPTATION_LAYER:
8157 retval = sctp_getsockopt_adaptation_layer(sk, len, optval,
8161 retval = sctp_getsockopt_context(sk, len, optval, optlen);
8163 case SCTP_FRAGMENT_INTERLEAVE:
8164 retval = sctp_getsockopt_fragment_interleave(sk, len, optval,
8167 case SCTP_PARTIAL_DELIVERY_POINT:
8168 retval = sctp_getsockopt_partial_delivery_point(sk, len, optval,
8171 case SCTP_MAX_BURST:
8172 retval = sctp_getsockopt_maxburst(sk, len, optval, optlen);
8175 case SCTP_AUTH_CHUNK:
8176 case SCTP_AUTH_DELETE_KEY:
8177 case SCTP_AUTH_DEACTIVATE_KEY:
8178 retval = -EOPNOTSUPP;
8180 case SCTP_HMAC_IDENT:
8181 retval = sctp_getsockopt_hmac_ident(sk, len, optval, optlen);
8183 case SCTP_AUTH_ACTIVE_KEY:
8184 retval = sctp_getsockopt_active_key(sk, len, optval, optlen);
8186 case SCTP_PEER_AUTH_CHUNKS:
8187 retval = sctp_getsockopt_peer_auth_chunks(sk, len, optval,
8190 case SCTP_LOCAL_AUTH_CHUNKS:
8191 retval = sctp_getsockopt_local_auth_chunks(sk, len, optval,
8194 case SCTP_GET_ASSOC_NUMBER:
8195 retval = sctp_getsockopt_assoc_number(sk, len, optval, optlen);
8197 case SCTP_GET_ASSOC_ID_LIST:
8198 retval = sctp_getsockopt_assoc_ids(sk, len, optval, optlen);
8200 case SCTP_AUTO_ASCONF:
8201 retval = sctp_getsockopt_auto_asconf(sk, len, optval, optlen);
8203 case SCTP_PEER_ADDR_THLDS:
8204 retval = sctp_getsockopt_paddr_thresholds(sk, optval, len,
8207 case SCTP_PEER_ADDR_THLDS_V2:
8208 retval = sctp_getsockopt_paddr_thresholds(sk, optval, len,
8211 case SCTP_GET_ASSOC_STATS:
8212 retval = sctp_getsockopt_assoc_stats(sk, len, optval, optlen);
8214 case SCTP_RECVRCVINFO:
8215 retval = sctp_getsockopt_recvrcvinfo(sk, len, optval, optlen);
8217 case SCTP_RECVNXTINFO:
8218 retval = sctp_getsockopt_recvnxtinfo(sk, len, optval, optlen);
8220 case SCTP_PR_SUPPORTED:
8221 retval = sctp_getsockopt_pr_supported(sk, len, optval, optlen);
8223 case SCTP_DEFAULT_PRINFO:
8224 retval = sctp_getsockopt_default_prinfo(sk, len, optval,
8227 case SCTP_PR_ASSOC_STATUS:
8228 retval = sctp_getsockopt_pr_assocstatus(sk, len, optval,
8231 case SCTP_PR_STREAM_STATUS:
8232 retval = sctp_getsockopt_pr_streamstatus(sk, len, optval,
8235 case SCTP_RECONFIG_SUPPORTED:
8236 retval = sctp_getsockopt_reconfig_supported(sk, len, optval,
8239 case SCTP_ENABLE_STREAM_RESET:
8240 retval = sctp_getsockopt_enable_strreset(sk, len, optval,
8243 case SCTP_STREAM_SCHEDULER:
8244 retval = sctp_getsockopt_scheduler(sk, len, optval,
8247 case SCTP_STREAM_SCHEDULER_VALUE:
8248 retval = sctp_getsockopt_scheduler_value(sk, len, optval,
8251 case SCTP_INTERLEAVING_SUPPORTED:
8252 retval = sctp_getsockopt_interleaving_supported(sk, len, optval,
8255 case SCTP_REUSE_PORT:
8256 retval = sctp_getsockopt_reuse_port(sk, len, optval, optlen);
8259 retval = sctp_getsockopt_event(sk, len, optval, optlen);
8261 case SCTP_ASCONF_SUPPORTED:
8262 retval = sctp_getsockopt_asconf_supported(sk, len, optval,
8265 case SCTP_AUTH_SUPPORTED:
8266 retval = sctp_getsockopt_auth_supported(sk, len, optval,
8269 case SCTP_ECN_SUPPORTED:
8270 retval = sctp_getsockopt_ecn_supported(sk, len, optval, optlen);
8272 case SCTP_EXPOSE_POTENTIALLY_FAILED_STATE:
8273 retval = sctp_getsockopt_pf_expose(sk, len, optval, optlen);
8275 case SCTP_REMOTE_UDP_ENCAPS_PORT:
8276 retval = sctp_getsockopt_encap_port(sk, len, optval, optlen);
8278 case SCTP_PLPMTUD_PROBE_INTERVAL:
8279 retval = sctp_getsockopt_probe_interval(sk, len, optval, optlen);
8282 retval = -ENOPROTOOPT;
8290 static bool sctp_bpf_bypass_getsockopt(int level, int optname)
8292 if (level == SOL_SCTP) {
8294 case SCTP_SOCKOPT_PEELOFF:
8295 case SCTP_SOCKOPT_PEELOFF_FLAGS:
8296 case SCTP_SOCKOPT_CONNECTX3:
8306 static int sctp_hash(struct sock *sk)
8312 static void sctp_unhash(struct sock *sk)
8317 /* Check if port is acceptable. Possibly find first available port.
8319 * The port hash table (contained in the 'global' SCTP protocol storage
8320 * returned by struct sctp_protocol *sctp_get_protocol()). The hash
8321 * table is an array of 4096 lists (sctp_bind_hashbucket). Each
8322 * list (the list number is the port number hashed out, so as you
8323 * would expect from a hash function, all the ports in a given list have
8324 * such a number that hashes out to the same list number; you were
8325 * expecting that, right?); so each list has a set of ports, with a
8326 * link to the socket (struct sock) that uses it, the port number and
8327 * a fastreuse flag (FIXME: NPI ipg).
8329 static struct sctp_bind_bucket *sctp_bucket_create(
8330 struct sctp_bind_hashbucket *head, struct net *, unsigned short snum);
8332 static int sctp_get_port_local(struct sock *sk, union sctp_addr *addr)
8334 struct sctp_sock *sp = sctp_sk(sk);
8335 bool reuse = (sk->sk_reuse || sp->reuse);
8336 struct sctp_bind_hashbucket *head; /* hash list */
8337 struct net *net = sock_net(sk);
8338 kuid_t uid = sock_i_uid(sk);
8339 struct sctp_bind_bucket *pp;
8340 unsigned short snum;
8343 snum = ntohs(addr->v4.sin_port);
8345 pr_debug("%s: begins, snum:%d\n", __func__, snum);
8348 /* Search for an available port. */
8349 int low, high, remaining, index;
8352 inet_sk_get_local_port_range(sk, &low, &high);
8353 remaining = (high - low) + 1;
8354 rover = prandom_u32_max(remaining) + low;
8358 if ((rover < low) || (rover > high))
8360 if (inet_is_local_reserved_port(net, rover))
8362 index = sctp_phashfn(net, rover);
8363 head = &sctp_port_hashtable[index];
8364 spin_lock_bh(&head->lock);
8365 sctp_for_each_hentry(pp, &head->chain)
8366 if ((pp->port == rover) &&
8367 net_eq(net, pp->net))
8371 spin_unlock_bh(&head->lock);
8373 } while (--remaining > 0);
8375 /* Exhausted local port range during search? */
8380 /* OK, here is the one we will use. HEAD (the port
8381 * hash table list entry) is non-NULL and we hold it's
8386 /* We are given an specific port number; we verify
8387 * that it is not being used. If it is used, we will
8388 * exahust the search in the hash list corresponding
8389 * to the port number (snum) - we detect that with the
8390 * port iterator, pp being NULL.
8392 head = &sctp_port_hashtable[sctp_phashfn(net, snum)];
8393 spin_lock_bh(&head->lock);
8394 sctp_for_each_hentry(pp, &head->chain) {
8395 if ((pp->port == snum) && net_eq(pp->net, net))
8402 if (!hlist_empty(&pp->owner)) {
8403 /* We had a port hash table hit - there is an
8404 * available port (pp != NULL) and it is being
8405 * used by other socket (pp->owner not empty); that other
8406 * socket is going to be sk2.
8410 pr_debug("%s: found a possible match\n", __func__);
8412 if ((pp->fastreuse && reuse &&
8413 sk->sk_state != SCTP_SS_LISTENING) ||
8414 (pp->fastreuseport && sk->sk_reuseport &&
8415 uid_eq(pp->fastuid, uid)))
8418 /* Run through the list of sockets bound to the port
8419 * (pp->port) [via the pointers bind_next and
8420 * bind_pprev in the struct sock *sk2 (pp->sk)]. On each one,
8421 * we get the endpoint they describe and run through
8422 * the endpoint's list of IP (v4 or v6) addresses,
8423 * comparing each of the addresses with the address of
8424 * the socket sk. If we find a match, then that means
8425 * that this port/socket (sk) combination are already
8428 sk_for_each_bound(sk2, &pp->owner) {
8429 struct sctp_sock *sp2 = sctp_sk(sk2);
8430 struct sctp_endpoint *ep2 = sp2->ep;
8433 (reuse && (sk2->sk_reuse || sp2->reuse) &&
8434 sk2->sk_state != SCTP_SS_LISTENING) ||
8435 (sk->sk_reuseport && sk2->sk_reuseport &&
8436 uid_eq(uid, sock_i_uid(sk2))))
8439 if (sctp_bind_addr_conflict(&ep2->base.bind_addr,
8446 pr_debug("%s: found a match\n", __func__);
8449 /* If there was a hash table miss, create a new port. */
8451 if (!pp && !(pp = sctp_bucket_create(head, net, snum)))
8454 /* In either case (hit or miss), make sure fastreuse is 1 only
8455 * if sk->sk_reuse is too (that is, if the caller requested
8456 * SO_REUSEADDR on this socket -sk-).
8458 if (hlist_empty(&pp->owner)) {
8459 if (reuse && sk->sk_state != SCTP_SS_LISTENING)
8464 if (sk->sk_reuseport) {
8465 pp->fastreuseport = 1;
8468 pp->fastreuseport = 0;
8471 if (pp->fastreuse &&
8472 (!reuse || sk->sk_state == SCTP_SS_LISTENING))
8475 if (pp->fastreuseport &&
8476 (!sk->sk_reuseport || !uid_eq(pp->fastuid, uid)))
8477 pp->fastreuseport = 0;
8480 /* We are set, so fill up all the data in the hash table
8481 * entry, tie the socket list information with the rest of the
8482 * sockets FIXME: Blurry, NPI (ipg).
8485 if (!sp->bind_hash) {
8486 inet_sk(sk)->inet_num = snum;
8487 sk_add_bind_node(sk, &pp->owner);
8493 spin_unlock_bh(&head->lock);
8497 /* Assign a 'snum' port to the socket. If snum == 0, an ephemeral
8498 * port is requested.
8500 static int sctp_get_port(struct sock *sk, unsigned short snum)
8502 union sctp_addr addr;
8503 struct sctp_af *af = sctp_sk(sk)->pf->af;
8505 /* Set up a dummy address struct from the sk. */
8506 af->from_sk(&addr, sk);
8507 addr.v4.sin_port = htons(snum);
8509 /* Note: sk->sk_num gets filled in if ephemeral port request. */
8510 return sctp_get_port_local(sk, &addr);
8514 * Move a socket to LISTENING state.
8516 static int sctp_listen_start(struct sock *sk, int backlog)
8518 struct sctp_sock *sp = sctp_sk(sk);
8519 struct sctp_endpoint *ep = sp->ep;
8520 struct crypto_shash *tfm = NULL;
8523 /* Allocate HMAC for generating cookie. */
8524 if (!sp->hmac && sp->sctp_hmac_alg) {
8525 sprintf(alg, "hmac(%s)", sp->sctp_hmac_alg);
8526 tfm = crypto_alloc_shash(alg, 0, 0);
8528 net_info_ratelimited("failed to load transform for %s: %ld\n",
8529 sp->sctp_hmac_alg, PTR_ERR(tfm));
8532 sctp_sk(sk)->hmac = tfm;
8536 * If a bind() or sctp_bindx() is not called prior to a listen()
8537 * call that allows new associations to be accepted, the system
8538 * picks an ephemeral port and will choose an address set equivalent
8539 * to binding with a wildcard address.
8541 * This is not currently spelled out in the SCTP sockets
8542 * extensions draft, but follows the practice as seen in TCP
8546 inet_sk_set_state(sk, SCTP_SS_LISTENING);
8547 if (!ep->base.bind_addr.port) {
8548 if (sctp_autobind(sk))
8551 if (sctp_get_port(sk, inet_sk(sk)->inet_num)) {
8552 inet_sk_set_state(sk, SCTP_SS_CLOSED);
8557 WRITE_ONCE(sk->sk_max_ack_backlog, backlog);
8558 return sctp_hash_endpoint(ep);
8562 * 4.1.3 / 5.1.3 listen()
8564 * By default, new associations are not accepted for UDP style sockets.
8565 * An application uses listen() to mark a socket as being able to
8566 * accept new associations.
8568 * On TCP style sockets, applications use listen() to ready the SCTP
8569 * endpoint for accepting inbound associations.
8571 * On both types of endpoints a backlog of '0' disables listening.
8573 * Move a socket to LISTENING state.
8575 int sctp_inet_listen(struct socket *sock, int backlog)
8577 struct sock *sk = sock->sk;
8578 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
8581 if (unlikely(backlog < 0))
8586 /* Peeled-off sockets are not allowed to listen(). */
8587 if (sctp_style(sk, UDP_HIGH_BANDWIDTH))
8590 if (sock->state != SS_UNCONNECTED)
8593 if (!sctp_sstate(sk, LISTENING) && !sctp_sstate(sk, CLOSED))
8596 /* If backlog is zero, disable listening. */
8598 if (sctp_sstate(sk, CLOSED))
8602 sctp_unhash_endpoint(ep);
8603 sk->sk_state = SCTP_SS_CLOSED;
8604 if (sk->sk_reuse || sctp_sk(sk)->reuse)
8605 sctp_sk(sk)->bind_hash->fastreuse = 1;
8609 /* If we are already listening, just update the backlog */
8610 if (sctp_sstate(sk, LISTENING))
8611 WRITE_ONCE(sk->sk_max_ack_backlog, backlog);
8613 err = sctp_listen_start(sk, backlog);
8625 * This function is done by modeling the current datagram_poll() and the
8626 * tcp_poll(). Note that, based on these implementations, we don't
8627 * lock the socket in this function, even though it seems that,
8628 * ideally, locking or some other mechanisms can be used to ensure
8629 * the integrity of the counters (sndbuf and wmem_alloc) used
8630 * in this place. We assume that we don't need locks either until proven
8633 * Another thing to note is that we include the Async I/O support
8634 * here, again, by modeling the current TCP/UDP code. We don't have
8635 * a good way to test with it yet.
8637 __poll_t sctp_poll(struct file *file, struct socket *sock, poll_table *wait)
8639 struct sock *sk = sock->sk;
8640 struct sctp_sock *sp = sctp_sk(sk);
8643 poll_wait(file, sk_sleep(sk), wait);
8645 sock_rps_record_flow(sk);
8647 /* A TCP-style listening socket becomes readable when the accept queue
8650 if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))
8651 return (!list_empty(&sp->ep->asocs)) ?
8652 (EPOLLIN | EPOLLRDNORM) : 0;
8656 /* Is there any exceptional events? */
8657 if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue))
8659 (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? EPOLLPRI : 0);
8660 if (sk->sk_shutdown & RCV_SHUTDOWN)
8661 mask |= EPOLLRDHUP | EPOLLIN | EPOLLRDNORM;
8662 if (sk->sk_shutdown == SHUTDOWN_MASK)
8665 /* Is it readable? Reconsider this code with TCP-style support. */
8666 if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
8667 mask |= EPOLLIN | EPOLLRDNORM;
8669 /* The association is either gone or not ready. */
8670 if (!sctp_style(sk, UDP) && sctp_sstate(sk, CLOSED))
8673 /* Is it writable? */
8674 if (sctp_writeable(sk)) {
8675 mask |= EPOLLOUT | EPOLLWRNORM;
8677 sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk);
8679 * Since the socket is not locked, the buffer
8680 * might be made available after the writeable check and
8681 * before the bit is set. This could cause a lost I/O
8682 * signal. tcp_poll() has a race breaker for this race
8683 * condition. Based on their implementation, we put
8684 * in the following code to cover it as well.
8686 if (sctp_writeable(sk))
8687 mask |= EPOLLOUT | EPOLLWRNORM;
8692 /********************************************************************
8693 * 2nd Level Abstractions
8694 ********************************************************************/
8696 static struct sctp_bind_bucket *sctp_bucket_create(
8697 struct sctp_bind_hashbucket *head, struct net *net, unsigned short snum)
8699 struct sctp_bind_bucket *pp;
8701 pp = kmem_cache_alloc(sctp_bucket_cachep, GFP_ATOMIC);
8703 SCTP_DBG_OBJCNT_INC(bind_bucket);
8706 INIT_HLIST_HEAD(&pp->owner);
8708 hlist_add_head(&pp->node, &head->chain);
8713 /* Caller must hold hashbucket lock for this tb with local BH disabled */
8714 static void sctp_bucket_destroy(struct sctp_bind_bucket *pp)
8716 if (pp && hlist_empty(&pp->owner)) {
8717 __hlist_del(&pp->node);
8718 kmem_cache_free(sctp_bucket_cachep, pp);
8719 SCTP_DBG_OBJCNT_DEC(bind_bucket);
8723 /* Release this socket's reference to a local port. */
8724 static inline void __sctp_put_port(struct sock *sk)
8726 struct sctp_bind_hashbucket *head =
8727 &sctp_port_hashtable[sctp_phashfn(sock_net(sk),
8728 inet_sk(sk)->inet_num)];
8729 struct sctp_bind_bucket *pp;
8731 spin_lock(&head->lock);
8732 pp = sctp_sk(sk)->bind_hash;
8733 __sk_del_bind_node(sk);
8734 sctp_sk(sk)->bind_hash = NULL;
8735 inet_sk(sk)->inet_num = 0;
8736 sctp_bucket_destroy(pp);
8737 spin_unlock(&head->lock);
8740 void sctp_put_port(struct sock *sk)
8743 __sctp_put_port(sk);
8748 * The system picks an ephemeral port and choose an address set equivalent
8749 * to binding with a wildcard address.
8750 * One of those addresses will be the primary address for the association.
8751 * This automatically enables the multihoming capability of SCTP.
8753 static int sctp_autobind(struct sock *sk)
8755 union sctp_addr autoaddr;
8759 /* Initialize a local sockaddr structure to INADDR_ANY. */
8760 af = sctp_sk(sk)->pf->af;
8762 port = htons(inet_sk(sk)->inet_num);
8763 af->inaddr_any(&autoaddr, port);
8765 return sctp_do_bind(sk, &autoaddr, af->sockaddr_len);
8768 /* Parse out IPPROTO_SCTP CMSG headers. Perform only minimal validation.
8771 * 4.2 The cmsghdr Structure *
8773 * When ancillary data is sent or received, any number of ancillary data
8774 * objects can be specified by the msg_control and msg_controllen members of
8775 * the msghdr structure, because each object is preceded by
8776 * a cmsghdr structure defining the object's length (the cmsg_len member).
8777 * Historically Berkeley-derived implementations have passed only one object
8778 * at a time, but this API allows multiple objects to be
8779 * passed in a single call to sendmsg() or recvmsg(). The following example
8780 * shows two ancillary data objects in a control buffer.
8782 * |<--------------------------- msg_controllen -------------------------->|
8785 * |<----- ancillary data object ----->|<----- ancillary data object ----->|
8787 * |<---------- CMSG_SPACE() --------->|<---------- CMSG_SPACE() --------->|
8790 * |<---------- cmsg_len ---------->| |<--------- cmsg_len ----------->| |
8792 * |<--------- CMSG_LEN() --------->| |<-------- CMSG_LEN() ---------->| |
8795 * +-----+-----+-----+--+-----------+--+-----+-----+-----+--+-----------+--+
8796 * |cmsg_|cmsg_|cmsg_|XX| |XX|cmsg_|cmsg_|cmsg_|XX| |XX|
8798 * |len |level|type |XX|cmsg_data[]|XX|len |level|type |XX|cmsg_data[]|XX|
8800 * +-----+-----+-----+--+-----------+--+-----+-----+-----+--+-----------+--+
8807 static int sctp_msghdr_parse(const struct msghdr *msg, struct sctp_cmsgs *cmsgs)
8809 struct msghdr *my_msg = (struct msghdr *)msg;
8810 struct cmsghdr *cmsg;
8812 for_each_cmsghdr(cmsg, my_msg) {
8813 if (!CMSG_OK(my_msg, cmsg))
8816 /* Should we parse this header or ignore? */
8817 if (cmsg->cmsg_level != IPPROTO_SCTP)
8820 /* Strictly check lengths following example in SCM code. */
8821 switch (cmsg->cmsg_type) {
8823 /* SCTP Socket API Extension
8824 * 5.3.1 SCTP Initiation Structure (SCTP_INIT)
8826 * This cmsghdr structure provides information for
8827 * initializing new SCTP associations with sendmsg().
8828 * The SCTP_INITMSG socket option uses this same data
8829 * structure. This structure is not used for
8832 * cmsg_level cmsg_type cmsg_data[]
8833 * ------------ ------------ ----------------------
8834 * IPPROTO_SCTP SCTP_INIT struct sctp_initmsg
8836 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_initmsg)))
8839 cmsgs->init = CMSG_DATA(cmsg);
8843 /* SCTP Socket API Extension
8844 * 5.3.2 SCTP Header Information Structure(SCTP_SNDRCV)
8846 * This cmsghdr structure specifies SCTP options for
8847 * sendmsg() and describes SCTP header information
8848 * about a received message through recvmsg().
8850 * cmsg_level cmsg_type cmsg_data[]
8851 * ------------ ------------ ----------------------
8852 * IPPROTO_SCTP SCTP_SNDRCV struct sctp_sndrcvinfo
8854 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_sndrcvinfo)))
8857 cmsgs->srinfo = CMSG_DATA(cmsg);
8859 if (cmsgs->srinfo->sinfo_flags &
8860 ~(SCTP_UNORDERED | SCTP_ADDR_OVER |
8861 SCTP_SACK_IMMEDIATELY | SCTP_SENDALL |
8862 SCTP_PR_SCTP_MASK | SCTP_ABORT | SCTP_EOF))
8867 /* SCTP Socket API Extension
8868 * 5.3.4 SCTP Send Information Structure (SCTP_SNDINFO)
8870 * This cmsghdr structure specifies SCTP options for
8871 * sendmsg(). This structure and SCTP_RCVINFO replaces
8872 * SCTP_SNDRCV which has been deprecated.
8874 * cmsg_level cmsg_type cmsg_data[]
8875 * ------------ ------------ ---------------------
8876 * IPPROTO_SCTP SCTP_SNDINFO struct sctp_sndinfo
8878 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_sndinfo)))
8881 cmsgs->sinfo = CMSG_DATA(cmsg);
8883 if (cmsgs->sinfo->snd_flags &
8884 ~(SCTP_UNORDERED | SCTP_ADDR_OVER |
8885 SCTP_SACK_IMMEDIATELY | SCTP_SENDALL |
8886 SCTP_PR_SCTP_MASK | SCTP_ABORT | SCTP_EOF))
8890 /* SCTP Socket API Extension
8891 * 5.3.7 SCTP PR-SCTP Information Structure (SCTP_PRINFO)
8893 * This cmsghdr structure specifies SCTP options for sendmsg().
8895 * cmsg_level cmsg_type cmsg_data[]
8896 * ------------ ------------ ---------------------
8897 * IPPROTO_SCTP SCTP_PRINFO struct sctp_prinfo
8899 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_prinfo)))
8902 cmsgs->prinfo = CMSG_DATA(cmsg);
8903 if (cmsgs->prinfo->pr_policy & ~SCTP_PR_SCTP_MASK)
8906 if (cmsgs->prinfo->pr_policy == SCTP_PR_SCTP_NONE)
8907 cmsgs->prinfo->pr_value = 0;
8910 /* SCTP Socket API Extension
8911 * 5.3.8 SCTP AUTH Information Structure (SCTP_AUTHINFO)
8913 * This cmsghdr structure specifies SCTP options for sendmsg().
8915 * cmsg_level cmsg_type cmsg_data[]
8916 * ------------ ------------ ---------------------
8917 * IPPROTO_SCTP SCTP_AUTHINFO struct sctp_authinfo
8919 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_authinfo)))
8922 cmsgs->authinfo = CMSG_DATA(cmsg);
8924 case SCTP_DSTADDRV4:
8925 case SCTP_DSTADDRV6:
8926 /* SCTP Socket API Extension
8927 * 5.3.9/10 SCTP Destination IPv4/6 Address Structure (SCTP_DSTADDRV4/6)
8929 * This cmsghdr structure specifies SCTP options for sendmsg().
8931 * cmsg_level cmsg_type cmsg_data[]
8932 * ------------ ------------ ---------------------
8933 * IPPROTO_SCTP SCTP_DSTADDRV4 struct in_addr
8934 * ------------ ------------ ---------------------
8935 * IPPROTO_SCTP SCTP_DSTADDRV6 struct in6_addr
8937 cmsgs->addrs_msg = my_msg;
8948 * Wait for a packet..
8949 * Note: This function is the same function as in core/datagram.c
8950 * with a few modifications to make lksctp work.
8952 static int sctp_wait_for_packet(struct sock *sk, int *err, long *timeo_p)
8957 prepare_to_wait_exclusive(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
8959 /* Socket errors? */
8960 error = sock_error(sk);
8964 if (!skb_queue_empty(&sk->sk_receive_queue))
8967 /* Socket shut down? */
8968 if (sk->sk_shutdown & RCV_SHUTDOWN)
8971 /* Sequenced packets can come disconnected. If so we report the
8976 /* Is there a good reason to think that we may receive some data? */
8977 if (list_empty(&sctp_sk(sk)->ep->asocs) && !sctp_sstate(sk, LISTENING))
8980 /* Handle signals. */
8981 if (signal_pending(current))
8984 /* Let another process have a go. Since we are going to sleep
8985 * anyway. Note: This may cause odd behaviors if the message
8986 * does not fit in the user's buffer, but this seems to be the
8987 * only way to honor MSG_DONTWAIT realistically.
8990 *timeo_p = schedule_timeout(*timeo_p);
8994 finish_wait(sk_sleep(sk), &wait);
8998 error = sock_intr_errno(*timeo_p);
9001 finish_wait(sk_sleep(sk), &wait);
9006 /* Receive a datagram.
9007 * Note: This is pretty much the same routine as in core/datagram.c
9008 * with a few changes to make lksctp work.
9010 struct sk_buff *sctp_skb_recv_datagram(struct sock *sk, int flags, int *err)
9013 struct sk_buff *skb;
9016 timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
9018 pr_debug("%s: timeo:%ld, max:%ld\n", __func__, timeo,
9019 MAX_SCHEDULE_TIMEOUT);
9022 /* Again only user level code calls this function,
9023 * so nothing interrupt level
9024 * will suddenly eat the receive_queue.
9026 * Look at current nfs client by the way...
9027 * However, this function was correct in any case. 8)
9029 if (flags & MSG_PEEK) {
9030 skb = skb_peek(&sk->sk_receive_queue);
9032 refcount_inc(&skb->users);
9034 skb = __skb_dequeue(&sk->sk_receive_queue);
9040 /* Caller is allowed not to check sk->sk_err before calling. */
9041 error = sock_error(sk);
9045 if (sk->sk_shutdown & RCV_SHUTDOWN)
9049 /* User doesn't want to wait. */
9053 } while (sctp_wait_for_packet(sk, err, &timeo) == 0);
9062 /* If sndbuf has changed, wake up per association sndbuf waiters. */
9063 static void __sctp_write_space(struct sctp_association *asoc)
9065 struct sock *sk = asoc->base.sk;
9067 if (sctp_wspace(asoc) <= 0)
9070 if (waitqueue_active(&asoc->wait))
9071 wake_up_interruptible(&asoc->wait);
9073 if (sctp_writeable(sk)) {
9074 struct socket_wq *wq;
9077 wq = rcu_dereference(sk->sk_wq);
9079 if (waitqueue_active(&wq->wait))
9080 wake_up_interruptible(&wq->wait);
9082 /* Note that we try to include the Async I/O support
9083 * here by modeling from the current TCP/UDP code.
9084 * We have not tested with it yet.
9086 if (!(sk->sk_shutdown & SEND_SHUTDOWN))
9087 sock_wake_async(wq, SOCK_WAKE_SPACE, POLL_OUT);
9093 static void sctp_wake_up_waiters(struct sock *sk,
9094 struct sctp_association *asoc)
9096 struct sctp_association *tmp = asoc;
9098 /* We do accounting for the sndbuf space per association,
9099 * so we only need to wake our own association.
9101 if (asoc->ep->sndbuf_policy)
9102 return __sctp_write_space(asoc);
9104 /* If association goes down and is just flushing its
9105 * outq, then just normally notify others.
9107 if (asoc->base.dead)
9108 return sctp_write_space(sk);
9110 /* Accounting for the sndbuf space is per socket, so we
9111 * need to wake up others, try to be fair and in case of
9112 * other associations, let them have a go first instead
9113 * of just doing a sctp_write_space() call.
9115 * Note that we reach sctp_wake_up_waiters() only when
9116 * associations free up queued chunks, thus we are under
9117 * lock and the list of associations on a socket is
9118 * guaranteed not to change.
9120 for (tmp = list_next_entry(tmp, asocs); 1;
9121 tmp = list_next_entry(tmp, asocs)) {
9122 /* Manually skip the head element. */
9123 if (&tmp->asocs == &((sctp_sk(sk))->ep->asocs))
9125 /* Wake up association. */
9126 __sctp_write_space(tmp);
9127 /* We've reached the end. */
9133 /* Do accounting for the sndbuf space.
9134 * Decrement the used sndbuf space of the corresponding association by the
9135 * data size which was just transmitted(freed).
9137 static void sctp_wfree(struct sk_buff *skb)
9139 struct sctp_chunk *chunk = skb_shinfo(skb)->destructor_arg;
9140 struct sctp_association *asoc = chunk->asoc;
9141 struct sock *sk = asoc->base.sk;
9143 sk_mem_uncharge(sk, skb->truesize);
9144 sk_wmem_queued_add(sk, -(skb->truesize + sizeof(struct sctp_chunk)));
9145 asoc->sndbuf_used -= skb->truesize + sizeof(struct sctp_chunk);
9146 WARN_ON(refcount_sub_and_test(sizeof(struct sctp_chunk),
9147 &sk->sk_wmem_alloc));
9150 struct sctp_shared_key *shkey = chunk->shkey;
9152 /* refcnt == 2 and !list_empty mean after this release, it's
9153 * not being used anywhere, and it's time to notify userland
9154 * that this shkey can be freed if it's been deactivated.
9156 if (shkey->deactivated && !list_empty(&shkey->key_list) &&
9157 refcount_read(&shkey->refcnt) == 2) {
9158 struct sctp_ulpevent *ev;
9160 ev = sctp_ulpevent_make_authkey(asoc, shkey->key_id,
9164 asoc->stream.si->enqueue_event(&asoc->ulpq, ev);
9166 sctp_auth_shkey_release(chunk->shkey);
9170 sctp_wake_up_waiters(sk, asoc);
9172 sctp_association_put(asoc);
9175 /* Do accounting for the receive space on the socket.
9176 * Accounting for the association is done in ulpevent.c
9177 * We set this as a destructor for the cloned data skbs so that
9178 * accounting is done at the correct time.
9180 void sctp_sock_rfree(struct sk_buff *skb)
9182 struct sock *sk = skb->sk;
9183 struct sctp_ulpevent *event = sctp_skb2event(skb);
9185 atomic_sub(event->rmem_len, &sk->sk_rmem_alloc);
9188 * Mimic the behavior of sock_rfree
9190 sk_mem_uncharge(sk, event->rmem_len);
9194 /* Helper function to wait for space in the sndbuf. */
9195 static int sctp_wait_for_sndbuf(struct sctp_association *asoc, long *timeo_p,
9198 struct sock *sk = asoc->base.sk;
9199 long current_timeo = *timeo_p;
9203 pr_debug("%s: asoc:%p, timeo:%ld, msg_len:%zu\n", __func__, asoc,
9206 /* Increment the association's refcnt. */
9207 sctp_association_hold(asoc);
9209 /* Wait on the association specific sndbuf space. */
9211 prepare_to_wait_exclusive(&asoc->wait, &wait,
9212 TASK_INTERRUPTIBLE);
9213 if (asoc->base.dead)
9217 if (sk->sk_err || asoc->state >= SCTP_STATE_SHUTDOWN_PENDING)
9219 if (signal_pending(current))
9220 goto do_interrupted;
9221 if ((int)msg_len <= sctp_wspace(asoc) &&
9222 sk_wmem_schedule(sk, msg_len))
9225 /* Let another process have a go. Since we are going
9229 current_timeo = schedule_timeout(current_timeo);
9231 if (sk != asoc->base.sk)
9234 *timeo_p = current_timeo;
9238 finish_wait(&asoc->wait, &wait);
9240 /* Release the association's refcnt. */
9241 sctp_association_put(asoc);
9254 err = sock_intr_errno(*timeo_p);
9262 void sctp_data_ready(struct sock *sk)
9264 struct socket_wq *wq;
9267 wq = rcu_dereference(sk->sk_wq);
9268 if (skwq_has_sleeper(wq))
9269 wake_up_interruptible_sync_poll(&wq->wait, EPOLLIN |
9270 EPOLLRDNORM | EPOLLRDBAND);
9271 sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_IN);
9275 /* If socket sndbuf has changed, wake up all per association waiters. */
9276 void sctp_write_space(struct sock *sk)
9278 struct sctp_association *asoc;
9280 /* Wake up the tasks in each wait queue. */
9281 list_for_each_entry(asoc, &((sctp_sk(sk))->ep->asocs), asocs) {
9282 __sctp_write_space(asoc);
9286 /* Is there any sndbuf space available on the socket?
9288 * Note that sk_wmem_alloc is the sum of the send buffers on all of the
9289 * associations on the same socket. For a UDP-style socket with
9290 * multiple associations, it is possible for it to be "unwriteable"
9291 * prematurely. I assume that this is acceptable because
9292 * a premature "unwriteable" is better than an accidental "writeable" which
9293 * would cause an unwanted block under certain circumstances. For the 1-1
9294 * UDP-style sockets or TCP-style sockets, this code should work.
9297 static bool sctp_writeable(const struct sock *sk)
9299 return READ_ONCE(sk->sk_sndbuf) > READ_ONCE(sk->sk_wmem_queued);
9302 /* Wait for an association to go into ESTABLISHED state. If timeout is 0,
9303 * returns immediately with EINPROGRESS.
9305 static int sctp_wait_for_connect(struct sctp_association *asoc, long *timeo_p)
9307 struct sock *sk = asoc->base.sk;
9309 long current_timeo = *timeo_p;
9312 pr_debug("%s: asoc:%p, timeo:%ld\n", __func__, asoc, *timeo_p);
9314 /* Increment the association's refcnt. */
9315 sctp_association_hold(asoc);
9318 prepare_to_wait_exclusive(&asoc->wait, &wait,
9319 TASK_INTERRUPTIBLE);
9322 if (sk->sk_shutdown & RCV_SHUTDOWN)
9324 if (sk->sk_err || asoc->state >= SCTP_STATE_SHUTDOWN_PENDING ||
9327 if (signal_pending(current))
9328 goto do_interrupted;
9330 if (sctp_state(asoc, ESTABLISHED))
9333 /* Let another process have a go. Since we are going
9337 current_timeo = schedule_timeout(current_timeo);
9340 *timeo_p = current_timeo;
9344 finish_wait(&asoc->wait, &wait);
9346 /* Release the association's refcnt. */
9347 sctp_association_put(asoc);
9352 if (asoc->init_err_counter + 1 > asoc->max_init_attempts)
9355 err = -ECONNREFUSED;
9359 err = sock_intr_errno(*timeo_p);
9367 static int sctp_wait_for_accept(struct sock *sk, long timeo)
9369 struct sctp_endpoint *ep;
9373 ep = sctp_sk(sk)->ep;
9377 prepare_to_wait_exclusive(sk_sleep(sk), &wait,
9378 TASK_INTERRUPTIBLE);
9380 if (list_empty(&ep->asocs)) {
9382 timeo = schedule_timeout(timeo);
9387 if (!sctp_sstate(sk, LISTENING))
9391 if (!list_empty(&ep->asocs))
9394 err = sock_intr_errno(timeo);
9395 if (signal_pending(current))
9403 finish_wait(sk_sleep(sk), &wait);
9408 static void sctp_wait_for_close(struct sock *sk, long timeout)
9413 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
9414 if (list_empty(&sctp_sk(sk)->ep->asocs))
9417 timeout = schedule_timeout(timeout);
9419 } while (!signal_pending(current) && timeout);
9421 finish_wait(sk_sleep(sk), &wait);
9424 static void sctp_skb_set_owner_r_frag(struct sk_buff *skb, struct sock *sk)
9426 struct sk_buff *frag;
9431 /* Don't forget the fragments. */
9432 skb_walk_frags(skb, frag)
9433 sctp_skb_set_owner_r_frag(frag, sk);
9436 sctp_skb_set_owner_r(skb, sk);
9439 void sctp_copy_sock(struct sock *newsk, struct sock *sk,
9440 struct sctp_association *asoc)
9442 struct inet_sock *inet = inet_sk(sk);
9443 struct inet_sock *newinet;
9444 struct sctp_sock *sp = sctp_sk(sk);
9446 newsk->sk_type = sk->sk_type;
9447 newsk->sk_bound_dev_if = sk->sk_bound_dev_if;
9448 newsk->sk_flags = sk->sk_flags;
9449 newsk->sk_tsflags = sk->sk_tsflags;
9450 newsk->sk_no_check_tx = sk->sk_no_check_tx;
9451 newsk->sk_no_check_rx = sk->sk_no_check_rx;
9452 newsk->sk_reuse = sk->sk_reuse;
9453 sctp_sk(newsk)->reuse = sp->reuse;
9455 newsk->sk_shutdown = sk->sk_shutdown;
9456 newsk->sk_destruct = sk->sk_destruct;
9457 newsk->sk_family = sk->sk_family;
9458 newsk->sk_protocol = IPPROTO_SCTP;
9459 newsk->sk_backlog_rcv = sk->sk_prot->backlog_rcv;
9460 newsk->sk_sndbuf = sk->sk_sndbuf;
9461 newsk->sk_rcvbuf = sk->sk_rcvbuf;
9462 newsk->sk_lingertime = sk->sk_lingertime;
9463 newsk->sk_rcvtimeo = sk->sk_rcvtimeo;
9464 newsk->sk_sndtimeo = sk->sk_sndtimeo;
9465 newsk->sk_rxhash = sk->sk_rxhash;
9467 newinet = inet_sk(newsk);
9469 /* Initialize sk's sport, dport, rcv_saddr and daddr for
9470 * getsockname() and getpeername()
9472 newinet->inet_sport = inet->inet_sport;
9473 newinet->inet_saddr = inet->inet_saddr;
9474 newinet->inet_rcv_saddr = inet->inet_rcv_saddr;
9475 newinet->inet_dport = htons(asoc->peer.port);
9476 newinet->pmtudisc = inet->pmtudisc;
9477 atomic_set(&newinet->inet_id, get_random_u16());
9479 newinet->uc_ttl = inet->uc_ttl;
9480 newinet->mc_loop = 1;
9481 newinet->mc_ttl = 1;
9482 newinet->mc_index = 0;
9483 newinet->mc_list = NULL;
9485 if (newsk->sk_flags & SK_FLAGS_TIMESTAMP)
9486 net_enable_timestamp();
9488 /* Set newsk security attributes from original sk and connection
9489 * security attribute from asoc.
9491 security_sctp_sk_clone(asoc, sk, newsk);
9494 static inline void sctp_copy_descendant(struct sock *sk_to,
9495 const struct sock *sk_from)
9497 size_t ancestor_size = sizeof(struct inet_sock);
9499 ancestor_size += sk_from->sk_prot->obj_size;
9500 ancestor_size -= offsetof(struct sctp_sock, pd_lobby);
9501 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
9504 /* Populate the fields of the newsk from the oldsk and migrate the assoc
9505 * and its messages to the newsk.
9507 static int sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
9508 struct sctp_association *assoc,
9509 enum sctp_socket_type type)
9511 struct sctp_sock *oldsp = sctp_sk(oldsk);
9512 struct sctp_sock *newsp = sctp_sk(newsk);
9513 struct sctp_bind_bucket *pp; /* hash list port iterator */
9514 struct sctp_endpoint *newep = newsp->ep;
9515 struct sk_buff *skb, *tmp;
9516 struct sctp_ulpevent *event;
9517 struct sctp_bind_hashbucket *head;
9520 /* Migrate socket buffer sizes and all the socket level options to the
9523 newsk->sk_sndbuf = oldsk->sk_sndbuf;
9524 newsk->sk_rcvbuf = oldsk->sk_rcvbuf;
9525 /* Brute force copy old sctp opt. */
9526 sctp_copy_descendant(newsk, oldsk);
9528 /* Restore the ep value that was overwritten with the above structure
9534 /* Hook this new socket in to the bind_hash list. */
9535 head = &sctp_port_hashtable[sctp_phashfn(sock_net(oldsk),
9536 inet_sk(oldsk)->inet_num)];
9537 spin_lock_bh(&head->lock);
9538 pp = sctp_sk(oldsk)->bind_hash;
9539 sk_add_bind_node(newsk, &pp->owner);
9540 sctp_sk(newsk)->bind_hash = pp;
9541 inet_sk(newsk)->inet_num = inet_sk(oldsk)->inet_num;
9542 spin_unlock_bh(&head->lock);
9544 /* Copy the bind_addr list from the original endpoint to the new
9545 * endpoint so that we can handle restarts properly
9547 err = sctp_bind_addr_dup(&newsp->ep->base.bind_addr,
9548 &oldsp->ep->base.bind_addr, GFP_KERNEL);
9552 /* New ep's auth_hmacs should be set if old ep's is set, in case
9553 * that net->sctp.auth_enable has been changed to 0 by users and
9554 * new ep's auth_hmacs couldn't be set in sctp_endpoint_init().
9556 if (oldsp->ep->auth_hmacs) {
9557 err = sctp_auth_init_hmacs(newsp->ep, GFP_KERNEL);
9562 sctp_auto_asconf_init(newsp);
9564 /* Move any messages in the old socket's receive queue that are for the
9565 * peeled off association to the new socket's receive queue.
9567 sctp_skb_for_each(skb, &oldsk->sk_receive_queue, tmp) {
9568 event = sctp_skb2event(skb);
9569 if (event->asoc == assoc) {
9570 __skb_unlink(skb, &oldsk->sk_receive_queue);
9571 __skb_queue_tail(&newsk->sk_receive_queue, skb);
9572 sctp_skb_set_owner_r_frag(skb, newsk);
9576 /* Clean up any messages pending delivery due to partial
9577 * delivery. Three cases:
9578 * 1) No partial deliver; no work.
9579 * 2) Peeling off partial delivery; keep pd_lobby in new pd_lobby.
9580 * 3) Peeling off non-partial delivery; move pd_lobby to receive_queue.
9582 atomic_set(&sctp_sk(newsk)->pd_mode, assoc->ulpq.pd_mode);
9584 if (atomic_read(&sctp_sk(oldsk)->pd_mode)) {
9585 struct sk_buff_head *queue;
9587 /* Decide which queue to move pd_lobby skbs to. */
9588 if (assoc->ulpq.pd_mode) {
9589 queue = &newsp->pd_lobby;
9591 queue = &newsk->sk_receive_queue;
9593 /* Walk through the pd_lobby, looking for skbs that
9594 * need moved to the new socket.
9596 sctp_skb_for_each(skb, &oldsp->pd_lobby, tmp) {
9597 event = sctp_skb2event(skb);
9598 if (event->asoc == assoc) {
9599 __skb_unlink(skb, &oldsp->pd_lobby);
9600 __skb_queue_tail(queue, skb);
9601 sctp_skb_set_owner_r_frag(skb, newsk);
9605 /* Clear up any skbs waiting for the partial
9606 * delivery to finish.
9608 if (assoc->ulpq.pd_mode)
9609 sctp_clear_pd(oldsk, NULL);
9613 sctp_for_each_rx_skb(assoc, newsk, sctp_skb_set_owner_r_frag);
9615 /* Set the type of socket to indicate that it is peeled off from the
9616 * original UDP-style socket or created with the accept() call on a
9617 * TCP-style socket..
9621 /* Mark the new socket "in-use" by the user so that any packets
9622 * that may arrive on the association after we've moved it are
9623 * queued to the backlog. This prevents a potential race between
9624 * backlog processing on the old socket and new-packet processing
9625 * on the new socket.
9627 * The caller has just allocated newsk so we can guarantee that other
9628 * paths won't try to lock it and then oldsk.
9630 lock_sock_nested(newsk, SINGLE_DEPTH_NESTING);
9631 sctp_for_each_tx_datachunk(assoc, true, sctp_clear_owner_w);
9632 sctp_assoc_migrate(assoc, newsk);
9633 sctp_for_each_tx_datachunk(assoc, false, sctp_set_owner_w);
9635 /* If the association on the newsk is already closed before accept()
9636 * is called, set RCV_SHUTDOWN flag.
9638 if (sctp_state(assoc, CLOSED) && sctp_style(newsk, TCP)) {
9639 inet_sk_set_state(newsk, SCTP_SS_CLOSED);
9640 newsk->sk_shutdown |= RCV_SHUTDOWN;
9642 inet_sk_set_state(newsk, SCTP_SS_ESTABLISHED);
9645 release_sock(newsk);
9651 /* This proto struct describes the ULP interface for SCTP. */
9652 struct proto sctp_prot = {
9654 .owner = THIS_MODULE,
9655 .close = sctp_close,
9656 .disconnect = sctp_disconnect,
9657 .accept = sctp_accept,
9658 .ioctl = sctp_ioctl,
9659 .init = sctp_init_sock,
9660 .destroy = sctp_destroy_sock,
9661 .shutdown = sctp_shutdown,
9662 .setsockopt = sctp_setsockopt,
9663 .getsockopt = sctp_getsockopt,
9664 .bpf_bypass_getsockopt = sctp_bpf_bypass_getsockopt,
9665 .sendmsg = sctp_sendmsg,
9666 .recvmsg = sctp_recvmsg,
9668 .bind_add = sctp_bind_add,
9669 .backlog_rcv = sctp_backlog_rcv,
9671 .unhash = sctp_unhash,
9672 .no_autobind = true,
9673 .obj_size = sizeof(struct sctp_sock),
9674 .useroffset = offsetof(struct sctp_sock, subscribe),
9675 .usersize = offsetof(struct sctp_sock, initmsg) -
9676 offsetof(struct sctp_sock, subscribe) +
9677 sizeof_field(struct sctp_sock, initmsg),
9678 .sysctl_mem = sysctl_sctp_mem,
9679 .sysctl_rmem = sysctl_sctp_rmem,
9680 .sysctl_wmem = sysctl_sctp_wmem,
9681 .memory_pressure = &sctp_memory_pressure,
9682 .enter_memory_pressure = sctp_enter_memory_pressure,
9684 .memory_allocated = &sctp_memory_allocated,
9685 .per_cpu_fw_alloc = &sctp_memory_per_cpu_fw_alloc,
9687 .sockets_allocated = &sctp_sockets_allocated,
9690 #if IS_ENABLED(CONFIG_IPV6)
9692 static void sctp_v6_destruct_sock(struct sock *sk)
9694 sctp_destruct_common(sk);
9695 inet6_sock_destruct(sk);
9698 static int sctp_v6_init_sock(struct sock *sk)
9700 int ret = sctp_init_sock(sk);
9703 sk->sk_destruct = sctp_v6_destruct_sock;
9708 struct proto sctpv6_prot = {
9710 .owner = THIS_MODULE,
9711 .close = sctp_close,
9712 .disconnect = sctp_disconnect,
9713 .accept = sctp_accept,
9714 .ioctl = sctp_ioctl,
9715 .init = sctp_v6_init_sock,
9716 .destroy = sctp_destroy_sock,
9717 .shutdown = sctp_shutdown,
9718 .setsockopt = sctp_setsockopt,
9719 .getsockopt = sctp_getsockopt,
9720 .bpf_bypass_getsockopt = sctp_bpf_bypass_getsockopt,
9721 .sendmsg = sctp_sendmsg,
9722 .recvmsg = sctp_recvmsg,
9724 .bind_add = sctp_bind_add,
9725 .backlog_rcv = sctp_backlog_rcv,
9727 .unhash = sctp_unhash,
9728 .no_autobind = true,
9729 .obj_size = sizeof(struct sctp6_sock),
9730 .useroffset = offsetof(struct sctp6_sock, sctp.subscribe),
9731 .usersize = offsetof(struct sctp6_sock, sctp.initmsg) -
9732 offsetof(struct sctp6_sock, sctp.subscribe) +
9733 sizeof_field(struct sctp6_sock, sctp.initmsg),
9734 .sysctl_mem = sysctl_sctp_mem,
9735 .sysctl_rmem = sysctl_sctp_rmem,
9736 .sysctl_wmem = sysctl_sctp_wmem,
9737 .memory_pressure = &sctp_memory_pressure,
9738 .enter_memory_pressure = sctp_enter_memory_pressure,
9740 .memory_allocated = &sctp_memory_allocated,
9741 .per_cpu_fw_alloc = &sctp_memory_per_cpu_fw_alloc,
9743 .sockets_allocated = &sctp_sockets_allocated,
9745 #endif /* IS_ENABLED(CONFIG_IPV6) */