1 /* SCTP kernel implementation
2 * (C) Copyright IBM Corp. 2001, 2004
3 * Copyright (c) 1999-2000 Cisco, Inc.
4 * Copyright (c) 1999-2001 Motorola, Inc.
5 * Copyright (c) 2001-2003 Intel Corp.
6 * Copyright (c) 2001-2002 Nokia, Inc.
7 * Copyright (c) 2001 La Monte H.P. Yarroll
9 * This file is part of the SCTP kernel implementation
11 * These functions interface with the sockets layer to implement the
12 * SCTP Extensions for the Sockets API.
14 * Note that the descriptions from the specification are USER level
15 * functions--this file is the functions which populate the struct proto
16 * for SCTP which is the BOTTOM of the sockets interface.
18 * This SCTP implementation is free software;
19 * you can redistribute it and/or modify it under the terms of
20 * the GNU General Public License as published by
21 * the Free Software Foundation; either version 2, or (at your option)
24 * This SCTP implementation is distributed in the hope that it
25 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
26 * ************************
27 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
28 * See the GNU General Public License for more details.
30 * You should have received a copy of the GNU General Public License
31 * along with GNU CC; see the file COPYING. If not, see
32 * <http://www.gnu.org/licenses/>.
34 * Please send any bug reports or fixes you make to the
36 * lksctp developers <linux-sctp@vger.kernel.org>
38 * Written or modified by:
39 * La Monte H.P. Yarroll <piggy@acm.org>
40 * Narasimha Budihal <narsi@refcode.org>
41 * Karl Knutson <karl@athena.chicago.il.us>
42 * Jon Grimm <jgrimm@us.ibm.com>
43 * Xingang Guo <xingang.guo@intel.com>
44 * Daisy Chang <daisyc@us.ibm.com>
45 * Sridhar Samudrala <samudrala@us.ibm.com>
46 * Inaky Perez-Gonzalez <inaky.gonzalez@intel.com>
47 * Ardelle Fan <ardelle.fan@intel.com>
48 * Ryan Layer <rmlayer@us.ibm.com>
49 * Anup Pemmaiah <pemmaiah@cc.usu.edu>
50 * Kevin Gao <kevin.gao@intel.com>
53 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
55 #include <crypto/hash.h>
56 #include <linux/types.h>
57 #include <linux/kernel.h>
58 #include <linux/wait.h>
59 #include <linux/time.h>
60 #include <linux/sched/signal.h>
62 #include <linux/capability.h>
63 #include <linux/fcntl.h>
64 #include <linux/poll.h>
65 #include <linux/init.h>
66 #include <linux/slab.h>
67 #include <linux/file.h>
68 #include <linux/compat.h>
69 #include <linux/rhashtable.h>
73 #include <net/route.h>
75 #include <net/inet_common.h>
76 #include <net/busy_poll.h>
78 #include <linux/socket.h> /* for sa_family_t */
79 #include <linux/export.h>
81 #include <net/sctp/sctp.h>
82 #include <net/sctp/sm.h>
83 #include <net/sctp/stream_sched.h>
85 /* Forward declarations for internal helper functions. */
86 static bool sctp_writeable(struct sock *sk);
87 static void sctp_wfree(struct sk_buff *skb);
88 static int sctp_wait_for_sndbuf(struct sctp_association *asoc, long *timeo_p,
90 static int sctp_wait_for_packet(struct sock *sk, int *err, long *timeo_p);
91 static int sctp_wait_for_connect(struct sctp_association *, long *timeo_p);
92 static int sctp_wait_for_accept(struct sock *sk, long timeo);
93 static void sctp_wait_for_close(struct sock *sk, long timeo);
94 static void sctp_destruct_sock(struct sock *sk);
95 static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt,
96 union sctp_addr *addr, int len);
97 static int sctp_bindx_add(struct sock *, struct sockaddr *, int);
98 static int sctp_bindx_rem(struct sock *, struct sockaddr *, int);
99 static int sctp_send_asconf_add_ip(struct sock *, struct sockaddr *, int);
100 static int sctp_send_asconf_del_ip(struct sock *, struct sockaddr *, int);
101 static int sctp_send_asconf(struct sctp_association *asoc,
102 struct sctp_chunk *chunk);
103 static int sctp_do_bind(struct sock *, union sctp_addr *, int);
104 static int sctp_autobind(struct sock *sk);
105 static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
106 struct sctp_association *assoc,
107 enum sctp_socket_type type);
109 static unsigned long sctp_memory_pressure;
110 static atomic_long_t sctp_memory_allocated;
111 struct percpu_counter sctp_sockets_allocated;
113 static void sctp_enter_memory_pressure(struct sock *sk)
115 sctp_memory_pressure = 1;
119 /* Get the sndbuf space available at the time on the association. */
120 static inline int sctp_wspace(struct sctp_association *asoc)
122 struct sock *sk = asoc->base.sk;
124 return asoc->ep->sndbuf_policy ? sk->sk_sndbuf - asoc->sndbuf_used
125 : sk_stream_wspace(sk);
128 /* Increment the used sndbuf space count of the corresponding association by
129 * the size of the outgoing data chunk.
130 * Also, set the skb destructor for sndbuf accounting later.
132 * Since it is always 1-1 between chunk and skb, and also a new skb is always
133 * allocated for chunk bundling in sctp_packet_transmit(), we can use the
134 * destructor in the data chunk skb for the purpose of the sndbuf space
137 static inline void sctp_set_owner_w(struct sctp_chunk *chunk)
139 struct sctp_association *asoc = chunk->asoc;
140 struct sock *sk = asoc->base.sk;
142 /* The sndbuf space is tracked per association. */
143 sctp_association_hold(asoc);
146 sctp_auth_shkey_hold(chunk->shkey);
148 skb_set_owner_w(chunk->skb, sk);
150 chunk->skb->destructor = sctp_wfree;
151 /* Save the chunk pointer in skb for sctp_wfree to use later. */
152 skb_shinfo(chunk->skb)->destructor_arg = chunk;
154 refcount_add(sizeof(struct sctp_chunk), &sk->sk_wmem_alloc);
155 asoc->sndbuf_used += chunk->skb->truesize + sizeof(struct sctp_chunk);
156 sk->sk_wmem_queued += chunk->skb->truesize + sizeof(struct sctp_chunk);
157 sk_mem_charge(sk, chunk->skb->truesize);
160 static void sctp_clear_owner_w(struct sctp_chunk *chunk)
162 skb_orphan(chunk->skb);
165 static void sctp_for_each_tx_datachunk(struct sctp_association *asoc,
166 void (*cb)(struct sctp_chunk *))
169 struct sctp_outq *q = &asoc->outqueue;
170 struct sctp_transport *t;
171 struct sctp_chunk *chunk;
173 list_for_each_entry(t, &asoc->peer.transport_addr_list, transports)
174 list_for_each_entry(chunk, &t->transmitted, transmitted_list)
177 list_for_each_entry(chunk, &q->retransmit, transmitted_list)
180 list_for_each_entry(chunk, &q->sacked, transmitted_list)
183 list_for_each_entry(chunk, &q->abandoned, transmitted_list)
186 list_for_each_entry(chunk, &q->out_chunk_list, list)
190 static void sctp_for_each_rx_skb(struct sctp_association *asoc, struct sock *sk,
191 void (*cb)(struct sk_buff *, struct sock *))
194 struct sk_buff *skb, *tmp;
196 sctp_skb_for_each(skb, &asoc->ulpq.lobby, tmp)
199 sctp_skb_for_each(skb, &asoc->ulpq.reasm, tmp)
202 sctp_skb_for_each(skb, &asoc->ulpq.reasm_uo, tmp)
206 /* Verify that this is a valid address. */
207 static inline int sctp_verify_addr(struct sock *sk, union sctp_addr *addr,
212 /* Verify basic sockaddr. */
213 af = sctp_sockaddr_af(sctp_sk(sk), addr, len);
217 /* Is this a valid SCTP address? */
218 if (!af->addr_valid(addr, sctp_sk(sk), NULL))
221 if (!sctp_sk(sk)->pf->send_verify(sctp_sk(sk), (addr)))
227 /* Look up the association by its id. If this is not a UDP-style
228 * socket, the ID field is always ignored.
230 struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id)
232 struct sctp_association *asoc = NULL;
234 /* If this is not a UDP-style socket, assoc id should be ignored. */
235 if (!sctp_style(sk, UDP)) {
236 /* Return NULL if the socket state is not ESTABLISHED. It
237 * could be a TCP-style listening socket or a socket which
238 * hasn't yet called connect() to establish an association.
240 if (!sctp_sstate(sk, ESTABLISHED) && !sctp_sstate(sk, CLOSING))
243 /* Get the first and the only association from the list. */
244 if (!list_empty(&sctp_sk(sk)->ep->asocs))
245 asoc = list_entry(sctp_sk(sk)->ep->asocs.next,
246 struct sctp_association, asocs);
250 /* Otherwise this is a UDP-style socket. */
251 if (id <= SCTP_ALL_ASSOC)
254 spin_lock_bh(&sctp_assocs_id_lock);
255 asoc = (struct sctp_association *)idr_find(&sctp_assocs_id, (int)id);
256 if (asoc && (asoc->base.sk != sk || asoc->base.dead))
258 spin_unlock_bh(&sctp_assocs_id_lock);
263 /* Look up the transport from an address and an assoc id. If both address and
264 * id are specified, the associations matching the address and the id should be
267 static struct sctp_transport *sctp_addr_id2transport(struct sock *sk,
268 struct sockaddr_storage *addr,
271 struct sctp_association *addr_asoc = NULL, *id_asoc = NULL;
272 struct sctp_af *af = sctp_get_af_specific(addr->ss_family);
273 union sctp_addr *laddr = (union sctp_addr *)addr;
274 struct sctp_transport *transport;
276 if (!af || sctp_verify_addr(sk, laddr, af->sockaddr_len))
279 addr_asoc = sctp_endpoint_lookup_assoc(sctp_sk(sk)->ep,
286 id_asoc = sctp_id2assoc(sk, id);
287 if (id_asoc && (id_asoc != addr_asoc))
290 sctp_get_pf_specific(sk->sk_family)->addr_to_user(sctp_sk(sk),
291 (union sctp_addr *)addr);
296 /* API 3.1.2 bind() - UDP Style Syntax
297 * The syntax of bind() is,
299 * ret = bind(int sd, struct sockaddr *addr, int addrlen);
301 * sd - the socket descriptor returned by socket().
302 * addr - the address structure (struct sockaddr_in or struct
303 * sockaddr_in6 [RFC 2553]),
304 * addr_len - the size of the address structure.
306 static int sctp_bind(struct sock *sk, struct sockaddr *addr, int addr_len)
312 pr_debug("%s: sk:%p, addr:%p, addr_len:%d\n", __func__, sk,
315 /* Disallow binding twice. */
316 if (!sctp_sk(sk)->ep->base.bind_addr.port)
317 retval = sctp_do_bind(sk, (union sctp_addr *)addr,
327 static long sctp_get_port_local(struct sock *, union sctp_addr *);
329 /* Verify this is a valid sockaddr. */
330 static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt,
331 union sctp_addr *addr, int len)
335 /* Check minimum size. */
336 if (len < sizeof (struct sockaddr))
339 if (!opt->pf->af_supported(addr->sa.sa_family, opt))
342 if (addr->sa.sa_family == AF_INET6) {
343 if (len < SIN6_LEN_RFC2133)
345 /* V4 mapped address are really of AF_INET family */
346 if (ipv6_addr_v4mapped(&addr->v6.sin6_addr) &&
347 !opt->pf->af_supported(AF_INET, opt))
351 /* If we get this far, af is valid. */
352 af = sctp_get_af_specific(addr->sa.sa_family);
354 if (len < af->sockaddr_len)
360 /* Bind a local address either to an endpoint or to an association. */
361 static int sctp_do_bind(struct sock *sk, union sctp_addr *addr, int len)
363 struct net *net = sock_net(sk);
364 struct sctp_sock *sp = sctp_sk(sk);
365 struct sctp_endpoint *ep = sp->ep;
366 struct sctp_bind_addr *bp = &ep->base.bind_addr;
371 /* Common sockaddr verification. */
372 af = sctp_sockaddr_af(sp, addr, len);
374 pr_debug("%s: sk:%p, newaddr:%p, len:%d EINVAL\n",
375 __func__, sk, addr, len);
379 snum = ntohs(addr->v4.sin_port);
381 pr_debug("%s: sk:%p, new addr:%pISc, port:%d, new port:%d, len:%d\n",
382 __func__, sk, &addr->sa, bp->port, snum, len);
384 /* PF specific bind() address verification. */
385 if (!sp->pf->bind_verify(sp, addr))
386 return -EADDRNOTAVAIL;
388 /* We must either be unbound, or bind to the same port.
389 * It's OK to allow 0 ports if we are already bound.
390 * We'll just inhert an already bound port in this case
395 else if (snum != bp->port) {
396 pr_debug("%s: new port %d doesn't match existing port "
397 "%d\n", __func__, snum, bp->port);
402 if (snum && snum < inet_prot_sock(net) &&
403 !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
406 /* See if the address matches any of the addresses we may have
407 * already bound before checking against other endpoints.
409 if (sctp_bind_addr_match(bp, addr, sp))
412 /* Make sure we are allowed to bind here.
413 * The function sctp_get_port_local() does duplicate address
416 addr->v4.sin_port = htons(snum);
417 if ((ret = sctp_get_port_local(sk, addr))) {
421 /* Refresh ephemeral port. */
423 bp->port = inet_sk(sk)->inet_num;
425 /* Add the address to the bind address list.
426 * Use GFP_ATOMIC since BHs will be disabled.
428 ret = sctp_add_bind_addr(bp, addr, af->sockaddr_len,
429 SCTP_ADDR_SRC, GFP_ATOMIC);
431 /* Copy back into socket for getsockname() use. */
433 inet_sk(sk)->inet_sport = htons(inet_sk(sk)->inet_num);
434 sp->pf->to_sk_saddr(addr, sk);
440 /* ADDIP Section 4.1.1 Congestion Control of ASCONF Chunks
442 * R1) One and only one ASCONF Chunk MAY be in transit and unacknowledged
443 * at any one time. If a sender, after sending an ASCONF chunk, decides
444 * it needs to transfer another ASCONF Chunk, it MUST wait until the
445 * ASCONF-ACK Chunk returns from the previous ASCONF Chunk before sending a
446 * subsequent ASCONF. Note this restriction binds each side, so at any
447 * time two ASCONF may be in-transit on any given association (one sent
448 * from each endpoint).
450 static int sctp_send_asconf(struct sctp_association *asoc,
451 struct sctp_chunk *chunk)
453 struct net *net = sock_net(asoc->base.sk);
456 /* If there is an outstanding ASCONF chunk, queue it for later
459 if (asoc->addip_last_asconf) {
460 list_add_tail(&chunk->list, &asoc->addip_chunk_list);
464 /* Hold the chunk until an ASCONF_ACK is received. */
465 sctp_chunk_hold(chunk);
466 retval = sctp_primitive_ASCONF(net, asoc, chunk);
468 sctp_chunk_free(chunk);
470 asoc->addip_last_asconf = chunk;
476 /* Add a list of addresses as bind addresses to local endpoint or
479 * Basically run through each address specified in the addrs/addrcnt
480 * array/length pair, determine if it is IPv6 or IPv4 and call
481 * sctp_do_bind() on it.
483 * If any of them fails, then the operation will be reversed and the
484 * ones that were added will be removed.
486 * Only sctp_setsockopt_bindx() is supposed to call this function.
488 static int sctp_bindx_add(struct sock *sk, struct sockaddr *addrs, int addrcnt)
493 struct sockaddr *sa_addr;
496 pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", __func__, sk,
500 for (cnt = 0; cnt < addrcnt; cnt++) {
501 /* The list may contain either IPv4 or IPv6 address;
502 * determine the address length for walking thru the list.
505 af = sctp_get_af_specific(sa_addr->sa_family);
511 retval = sctp_do_bind(sk, (union sctp_addr *)sa_addr,
514 addr_buf += af->sockaddr_len;
518 /* Failed. Cleanup the ones that have been added */
520 sctp_bindx_rem(sk, addrs, cnt);
528 /* Send an ASCONF chunk with Add IP address parameters to all the peers of the
529 * associations that are part of the endpoint indicating that a list of local
530 * addresses are added to the endpoint.
532 * If any of the addresses is already in the bind address list of the
533 * association, we do not send the chunk for that association. But it will not
534 * affect other associations.
536 * Only sctp_setsockopt_bindx() is supposed to call this function.
538 static int sctp_send_asconf_add_ip(struct sock *sk,
539 struct sockaddr *addrs,
542 struct net *net = sock_net(sk);
543 struct sctp_sock *sp;
544 struct sctp_endpoint *ep;
545 struct sctp_association *asoc;
546 struct sctp_bind_addr *bp;
547 struct sctp_chunk *chunk;
548 struct sctp_sockaddr_entry *laddr;
549 union sctp_addr *addr;
550 union sctp_addr saveaddr;
557 if (!net->sctp.addip_enable)
563 pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n",
564 __func__, sk, addrs, addrcnt);
566 list_for_each_entry(asoc, &ep->asocs, asocs) {
567 if (!asoc->peer.asconf_capable)
570 if (asoc->peer.addip_disabled_mask & SCTP_PARAM_ADD_IP)
573 if (!sctp_state(asoc, ESTABLISHED))
576 /* Check if any address in the packed array of addresses is
577 * in the bind address list of the association. If so,
578 * do not send the asconf chunk to its peer, but continue with
579 * other associations.
582 for (i = 0; i < addrcnt; i++) {
584 af = sctp_get_af_specific(addr->v4.sin_family);
590 if (sctp_assoc_lookup_laddr(asoc, addr))
593 addr_buf += af->sockaddr_len;
598 /* Use the first valid address in bind addr list of
599 * association as Address Parameter of ASCONF CHUNK.
601 bp = &asoc->base.bind_addr;
602 p = bp->address_list.next;
603 laddr = list_entry(p, struct sctp_sockaddr_entry, list);
604 chunk = sctp_make_asconf_update_ip(asoc, &laddr->a, addrs,
605 addrcnt, SCTP_PARAM_ADD_IP);
611 /* Add the new addresses to the bind address list with
612 * use_as_src set to 0.
615 for (i = 0; i < addrcnt; i++) {
617 af = sctp_get_af_specific(addr->v4.sin_family);
618 memcpy(&saveaddr, addr, af->sockaddr_len);
619 retval = sctp_add_bind_addr(bp, &saveaddr,
621 SCTP_ADDR_NEW, GFP_ATOMIC);
622 addr_buf += af->sockaddr_len;
624 if (asoc->src_out_of_asoc_ok) {
625 struct sctp_transport *trans;
627 list_for_each_entry(trans,
628 &asoc->peer.transport_addr_list, transports) {
629 trans->cwnd = min(4*asoc->pathmtu, max_t(__u32,
630 2*asoc->pathmtu, 4380));
631 trans->ssthresh = asoc->peer.i.a_rwnd;
632 trans->rto = asoc->rto_initial;
633 sctp_max_rto(asoc, trans);
634 trans->rtt = trans->srtt = trans->rttvar = 0;
635 /* Clear the source and route cache */
636 sctp_transport_route(trans, NULL,
637 sctp_sk(asoc->base.sk));
640 retval = sctp_send_asconf(asoc, chunk);
647 /* Remove a list of addresses from bind addresses list. Do not remove the
650 * Basically run through each address specified in the addrs/addrcnt
651 * array/length pair, determine if it is IPv6 or IPv4 and call
652 * sctp_del_bind() on it.
654 * If any of them fails, then the operation will be reversed and the
655 * ones that were removed will be added back.
657 * At least one address has to be left; if only one address is
658 * available, the operation will return -EBUSY.
660 * Only sctp_setsockopt_bindx() is supposed to call this function.
662 static int sctp_bindx_rem(struct sock *sk, struct sockaddr *addrs, int addrcnt)
664 struct sctp_sock *sp = sctp_sk(sk);
665 struct sctp_endpoint *ep = sp->ep;
667 struct sctp_bind_addr *bp = &ep->base.bind_addr;
670 union sctp_addr *sa_addr;
673 pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n",
674 __func__, sk, addrs, addrcnt);
677 for (cnt = 0; cnt < addrcnt; cnt++) {
678 /* If the bind address list is empty or if there is only one
679 * bind address, there is nothing more to be removed (we need
680 * at least one address here).
682 if (list_empty(&bp->address_list) ||
683 (sctp_list_single_entry(&bp->address_list))) {
689 af = sctp_get_af_specific(sa_addr->sa.sa_family);
695 if (!af->addr_valid(sa_addr, sp, NULL)) {
696 retval = -EADDRNOTAVAIL;
700 if (sa_addr->v4.sin_port &&
701 sa_addr->v4.sin_port != htons(bp->port)) {
706 if (!sa_addr->v4.sin_port)
707 sa_addr->v4.sin_port = htons(bp->port);
709 /* FIXME - There is probably a need to check if sk->sk_saddr and
710 * sk->sk_rcv_addr are currently set to one of the addresses to
711 * be removed. This is something which needs to be looked into
712 * when we are fixing the outstanding issues with multi-homing
713 * socket routing and failover schemes. Refer to comments in
714 * sctp_do_bind(). -daisy
716 retval = sctp_del_bind_addr(bp, sa_addr);
718 addr_buf += af->sockaddr_len;
721 /* Failed. Add the ones that has been removed back */
723 sctp_bindx_add(sk, addrs, cnt);
731 /* Send an ASCONF chunk with Delete IP address parameters to all the peers of
732 * the associations that are part of the endpoint indicating that a list of
733 * local addresses are removed from the endpoint.
735 * If any of the addresses is already in the bind address list of the
736 * association, we do not send the chunk for that association. But it will not
737 * affect other associations.
739 * Only sctp_setsockopt_bindx() is supposed to call this function.
741 static int sctp_send_asconf_del_ip(struct sock *sk,
742 struct sockaddr *addrs,
745 struct net *net = sock_net(sk);
746 struct sctp_sock *sp;
747 struct sctp_endpoint *ep;
748 struct sctp_association *asoc;
749 struct sctp_transport *transport;
750 struct sctp_bind_addr *bp;
751 struct sctp_chunk *chunk;
752 union sctp_addr *laddr;
755 struct sctp_sockaddr_entry *saddr;
761 if (!net->sctp.addip_enable)
767 pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n",
768 __func__, sk, addrs, addrcnt);
770 list_for_each_entry(asoc, &ep->asocs, asocs) {
772 if (!asoc->peer.asconf_capable)
775 if (asoc->peer.addip_disabled_mask & SCTP_PARAM_DEL_IP)
778 if (!sctp_state(asoc, ESTABLISHED))
781 /* Check if any address in the packed array of addresses is
782 * not present in the bind address list of the association.
783 * If so, do not send the asconf chunk to its peer, but
784 * continue with other associations.
787 for (i = 0; i < addrcnt; i++) {
789 af = sctp_get_af_specific(laddr->v4.sin_family);
795 if (!sctp_assoc_lookup_laddr(asoc, laddr))
798 addr_buf += af->sockaddr_len;
803 /* Find one address in the association's bind address list
804 * that is not in the packed array of addresses. This is to
805 * make sure that we do not delete all the addresses in the
808 bp = &asoc->base.bind_addr;
809 laddr = sctp_find_unmatch_addr(bp, (union sctp_addr *)addrs,
811 if ((laddr == NULL) && (addrcnt == 1)) {
812 if (asoc->asconf_addr_del_pending)
814 asoc->asconf_addr_del_pending =
815 kzalloc(sizeof(union sctp_addr), GFP_ATOMIC);
816 if (asoc->asconf_addr_del_pending == NULL) {
820 asoc->asconf_addr_del_pending->sa.sa_family =
822 asoc->asconf_addr_del_pending->v4.sin_port =
824 if (addrs->sa_family == AF_INET) {
825 struct sockaddr_in *sin;
827 sin = (struct sockaddr_in *)addrs;
828 asoc->asconf_addr_del_pending->v4.sin_addr.s_addr = sin->sin_addr.s_addr;
829 } else if (addrs->sa_family == AF_INET6) {
830 struct sockaddr_in6 *sin6;
832 sin6 = (struct sockaddr_in6 *)addrs;
833 asoc->asconf_addr_del_pending->v6.sin6_addr = sin6->sin6_addr;
836 pr_debug("%s: keep the last address asoc:%p %pISc at %p\n",
837 __func__, asoc, &asoc->asconf_addr_del_pending->sa,
838 asoc->asconf_addr_del_pending);
840 asoc->src_out_of_asoc_ok = 1;
848 /* We do not need RCU protection throughout this loop
849 * because this is done under a socket lock from the
852 chunk = sctp_make_asconf_update_ip(asoc, laddr, addrs, addrcnt,
860 /* Reset use_as_src flag for the addresses in the bind address
861 * list that are to be deleted.
864 for (i = 0; i < addrcnt; i++) {
866 af = sctp_get_af_specific(laddr->v4.sin_family);
867 list_for_each_entry(saddr, &bp->address_list, list) {
868 if (sctp_cmp_addr_exact(&saddr->a, laddr))
869 saddr->state = SCTP_ADDR_DEL;
871 addr_buf += af->sockaddr_len;
874 /* Update the route and saddr entries for all the transports
875 * as some of the addresses in the bind address list are
876 * about to be deleted and cannot be used as source addresses.
878 list_for_each_entry(transport, &asoc->peer.transport_addr_list,
880 sctp_transport_route(transport, NULL,
881 sctp_sk(asoc->base.sk));
885 /* We don't need to transmit ASCONF */
887 retval = sctp_send_asconf(asoc, chunk);
893 /* set addr events to assocs in the endpoint. ep and addr_wq must be locked */
894 int sctp_asconf_mgmt(struct sctp_sock *sp, struct sctp_sockaddr_entry *addrw)
896 struct sock *sk = sctp_opt2sk(sp);
897 union sctp_addr *addr;
900 /* It is safe to write port space in caller. */
902 addr->v4.sin_port = htons(sp->ep->base.bind_addr.port);
903 af = sctp_get_af_specific(addr->sa.sa_family);
906 if (sctp_verify_addr(sk, addr, af->sockaddr_len))
909 if (addrw->state == SCTP_ADDR_NEW)
910 return sctp_send_asconf_add_ip(sk, (struct sockaddr *)addr, 1);
912 return sctp_send_asconf_del_ip(sk, (struct sockaddr *)addr, 1);
915 /* Helper for tunneling sctp_bindx() requests through sctp_setsockopt()
918 * int sctp_bindx(int sd, struct sockaddr *addrs, int addrcnt,
921 * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses.
922 * If the sd is an IPv6 socket, the addresses passed can either be IPv4
925 * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see
926 * Section 3.1.2 for this usage.
928 * addrs is a pointer to an array of one or more socket addresses. Each
929 * address is contained in its appropriate structure (i.e. struct
930 * sockaddr_in or struct sockaddr_in6) the family of the address type
931 * must be used to distinguish the address length (note that this
932 * representation is termed a "packed array" of addresses). The caller
933 * specifies the number of addresses in the array with addrcnt.
935 * On success, sctp_bindx() returns 0. On failure, sctp_bindx() returns
936 * -1, and sets errno to the appropriate error code.
938 * For SCTP, the port given in each socket address must be the same, or
939 * sctp_bindx() will fail, setting errno to EINVAL.
941 * The flags parameter is formed from the bitwise OR of zero or more of
942 * the following currently defined flags:
944 * SCTP_BINDX_ADD_ADDR
946 * SCTP_BINDX_REM_ADDR
948 * SCTP_BINDX_ADD_ADDR directs SCTP to add the given addresses to the
949 * association, and SCTP_BINDX_REM_ADDR directs SCTP to remove the given
950 * addresses from the association. The two flags are mutually exclusive;
951 * if both are given, sctp_bindx() will fail with EINVAL. A caller may
952 * not remove all addresses from an association; sctp_bindx() will
953 * reject such an attempt with EINVAL.
955 * An application can use sctp_bindx(SCTP_BINDX_ADD_ADDR) to associate
956 * additional addresses with an endpoint after calling bind(). Or use
957 * sctp_bindx(SCTP_BINDX_REM_ADDR) to remove some addresses a listening
958 * socket is associated with so that no new association accepted will be
959 * associated with those addresses. If the endpoint supports dynamic
960 * address a SCTP_BINDX_REM_ADDR or SCTP_BINDX_ADD_ADDR may cause a
961 * endpoint to send the appropriate message to the peer to change the
962 * peers address lists.
964 * Adding and removing addresses from a connected association is
965 * optional functionality. Implementations that do not support this
966 * functionality should return EOPNOTSUPP.
968 * Basically do nothing but copying the addresses from user to kernel
969 * land and invoking either sctp_bindx_add() or sctp_bindx_rem() on the sk.
970 * This is used for tunneling the sctp_bindx() request through sctp_setsockopt()
973 * On exit there is no need to do sockfd_put(), sys_setsockopt() does
976 * sk The sk of the socket
977 * addrs The pointer to the addresses in user land
978 * addrssize Size of the addrs buffer
979 * op Operation to perform (add or remove, see the flags of
982 * Returns 0 if ok, <0 errno code on error.
984 static int sctp_setsockopt_bindx(struct sock *sk,
985 struct sockaddr __user *addrs,
986 int addrs_size, int op)
988 struct sockaddr *kaddrs;
992 struct sockaddr *sa_addr;
996 pr_debug("%s: sk:%p addrs:%p addrs_size:%d opt:%d\n",
997 __func__, sk, addrs, addrs_size, op);
999 if (unlikely(addrs_size <= 0))
1002 kaddrs = vmemdup_user(addrs, addrs_size);
1003 if (unlikely(IS_ERR(kaddrs)))
1004 return PTR_ERR(kaddrs);
1006 /* Walk through the addrs buffer and count the number of addresses. */
1008 while (walk_size < addrs_size) {
1009 if (walk_size + sizeof(sa_family_t) > addrs_size) {
1015 af = sctp_get_af_specific(sa_addr->sa_family);
1017 /* If the address family is not supported or if this address
1018 * causes the address buffer to overflow return EINVAL.
1020 if (!af || (walk_size + af->sockaddr_len) > addrs_size) {
1025 addr_buf += af->sockaddr_len;
1026 walk_size += af->sockaddr_len;
1031 case SCTP_BINDX_ADD_ADDR:
1032 /* Allow security module to validate bindx addresses. */
1033 err = security_sctp_bind_connect(sk, SCTP_SOCKOPT_BINDX_ADD,
1034 (struct sockaddr *)kaddrs,
1038 err = sctp_bindx_add(sk, kaddrs, addrcnt);
1041 err = sctp_send_asconf_add_ip(sk, kaddrs, addrcnt);
1044 case SCTP_BINDX_REM_ADDR:
1045 err = sctp_bindx_rem(sk, kaddrs, addrcnt);
1048 err = sctp_send_asconf_del_ip(sk, kaddrs, addrcnt);
1062 /* __sctp_connect(struct sock* sk, struct sockaddr *kaddrs, int addrs_size)
1064 * Common routine for handling connect() and sctp_connectx().
1065 * Connect will come in with just a single address.
1067 static int __sctp_connect(struct sock *sk,
1068 struct sockaddr *kaddrs,
1069 int addrs_size, int flags,
1070 sctp_assoc_t *assoc_id)
1072 struct net *net = sock_net(sk);
1073 struct sctp_sock *sp;
1074 struct sctp_endpoint *ep;
1075 struct sctp_association *asoc = NULL;
1076 struct sctp_association *asoc2;
1077 struct sctp_transport *transport;
1079 enum sctp_scope scope;
1084 union sctp_addr *sa_addr = NULL;
1086 unsigned short port;
1091 /* connect() cannot be done on a socket that is already in ESTABLISHED
1092 * state - UDP-style peeled off socket or a TCP-style socket that
1093 * is already connected.
1094 * It cannot be done even on a TCP-style listening socket.
1096 if (sctp_sstate(sk, ESTABLISHED) || sctp_sstate(sk, CLOSING) ||
1097 (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))) {
1102 /* Walk through the addrs buffer and count the number of addresses. */
1104 while (walk_size < addrs_size) {
1107 if (walk_size + sizeof(sa_family_t) > addrs_size) {
1113 af = sctp_get_af_specific(sa_addr->sa.sa_family);
1115 /* If the address family is not supported or if this address
1116 * causes the address buffer to overflow return EINVAL.
1118 if (!af || (walk_size + af->sockaddr_len) > addrs_size) {
1123 port = ntohs(sa_addr->v4.sin_port);
1125 /* Save current address so we can work with it */
1126 memcpy(&to, sa_addr, af->sockaddr_len);
1128 err = sctp_verify_addr(sk, &to, af->sockaddr_len);
1132 /* Make sure the destination port is correctly set
1135 if (asoc && asoc->peer.port && asoc->peer.port != port) {
1140 /* Check if there already is a matching association on the
1141 * endpoint (other than the one created here).
1143 asoc2 = sctp_endpoint_lookup_assoc(ep, &to, &transport);
1144 if (asoc2 && asoc2 != asoc) {
1145 if (asoc2->state >= SCTP_STATE_ESTABLISHED)
1152 /* If we could not find a matching association on the endpoint,
1153 * make sure that there is no peeled-off association matching
1154 * the peer address even on another socket.
1156 if (sctp_endpoint_is_peeled_off(ep, &to)) {
1157 err = -EADDRNOTAVAIL;
1162 /* If a bind() or sctp_bindx() is not called prior to
1163 * an sctp_connectx() call, the system picks an
1164 * ephemeral port and will choose an address set
1165 * equivalent to binding with a wildcard address.
1167 if (!ep->base.bind_addr.port) {
1168 if (sctp_autobind(sk)) {
1174 * If an unprivileged user inherits a 1-many
1175 * style socket with open associations on a
1176 * privileged port, it MAY be permitted to
1177 * accept new associations, but it SHOULD NOT
1178 * be permitted to open new associations.
1180 if (ep->base.bind_addr.port <
1181 inet_prot_sock(net) &&
1182 !ns_capable(net->user_ns,
1183 CAP_NET_BIND_SERVICE)) {
1189 scope = sctp_scope(&to);
1190 asoc = sctp_association_new(ep, sk, scope, GFP_KERNEL);
1196 err = sctp_assoc_set_bind_addr_from_ep(asoc, scope,
1204 /* Prime the peer's transport structures. */
1205 transport = sctp_assoc_add_peer(asoc, &to, GFP_KERNEL,
1213 addr_buf += af->sockaddr_len;
1214 walk_size += af->sockaddr_len;
1217 /* In case the user of sctp_connectx() wants an association
1218 * id back, assign one now.
1221 err = sctp_assoc_set_id(asoc, GFP_KERNEL);
1226 err = sctp_primitive_ASSOCIATE(net, asoc, NULL);
1231 /* Initialize sk's dport and daddr for getpeername() */
1232 inet_sk(sk)->inet_dport = htons(asoc->peer.port);
1233 sp->pf->to_sk_daddr(sa_addr, sk);
1236 timeo = sock_sndtimeo(sk, flags & O_NONBLOCK);
1239 *assoc_id = asoc->assoc_id;
1241 err = sctp_wait_for_connect(asoc, &timeo);
1242 /* Note: the asoc may be freed after the return of
1243 * sctp_wait_for_connect.
1246 /* Don't free association on exit. */
1250 pr_debug("%s: took out_free path with asoc:%p kaddrs:%p err:%d\n",
1251 __func__, asoc, kaddrs, err);
1254 /* sctp_primitive_ASSOCIATE may have added this association
1255 * To the hash table, try to unhash it, just in case, its a noop
1256 * if it wasn't hashed so we're safe
1258 sctp_association_free(asoc);
1263 /* Helper for tunneling sctp_connectx() requests through sctp_setsockopt()
1266 * int sctp_connectx(int sd, struct sockaddr *addrs, int addrcnt,
1267 * sctp_assoc_t *asoc);
1269 * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses.
1270 * If the sd is an IPv6 socket, the addresses passed can either be IPv4
1271 * or IPv6 addresses.
1273 * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see
1274 * Section 3.1.2 for this usage.
1276 * addrs is a pointer to an array of one or more socket addresses. Each
1277 * address is contained in its appropriate structure (i.e. struct
1278 * sockaddr_in or struct sockaddr_in6) the family of the address type
1279 * must be used to distengish the address length (note that this
1280 * representation is termed a "packed array" of addresses). The caller
1281 * specifies the number of addresses in the array with addrcnt.
1283 * On success, sctp_connectx() returns 0. It also sets the assoc_id to
1284 * the association id of the new association. On failure, sctp_connectx()
1285 * returns -1, and sets errno to the appropriate error code. The assoc_id
1286 * is not touched by the kernel.
1288 * For SCTP, the port given in each socket address must be the same, or
1289 * sctp_connectx() will fail, setting errno to EINVAL.
1291 * An application can use sctp_connectx to initiate an association with
1292 * an endpoint that is multi-homed. Much like sctp_bindx() this call
1293 * allows a caller to specify multiple addresses at which a peer can be
1294 * reached. The way the SCTP stack uses the list of addresses to set up
1295 * the association is implementation dependent. This function only
1296 * specifies that the stack will try to make use of all the addresses in
1297 * the list when needed.
1299 * Note that the list of addresses passed in is only used for setting up
1300 * the association. It does not necessarily equal the set of addresses
1301 * the peer uses for the resulting association. If the caller wants to
1302 * find out the set of peer addresses, it must use sctp_getpaddrs() to
1303 * retrieve them after the association has been set up.
1305 * Basically do nothing but copying the addresses from user to kernel
1306 * land and invoking either sctp_connectx(). This is used for tunneling
1307 * the sctp_connectx() request through sctp_setsockopt() from userspace.
1309 * On exit there is no need to do sockfd_put(), sys_setsockopt() does
1312 * sk The sk of the socket
1313 * addrs The pointer to the addresses in user land
1314 * addrssize Size of the addrs buffer
1316 * Returns >=0 if ok, <0 errno code on error.
1318 static int __sctp_setsockopt_connectx(struct sock *sk,
1319 struct sockaddr __user *addrs,
1321 sctp_assoc_t *assoc_id)
1323 struct sockaddr *kaddrs;
1324 int err = 0, flags = 0;
1326 pr_debug("%s: sk:%p addrs:%p addrs_size:%d\n",
1327 __func__, sk, addrs, addrs_size);
1329 if (unlikely(addrs_size <= 0))
1332 kaddrs = vmemdup_user(addrs, addrs_size);
1333 if (unlikely(IS_ERR(kaddrs)))
1334 return PTR_ERR(kaddrs);
1336 /* Allow security module to validate connectx addresses. */
1337 err = security_sctp_bind_connect(sk, SCTP_SOCKOPT_CONNECTX,
1338 (struct sockaddr *)kaddrs,
1343 /* in-kernel sockets don't generally have a file allocated to them
1344 * if all they do is call sock_create_kern().
1346 if (sk->sk_socket->file)
1347 flags = sk->sk_socket->file->f_flags;
1349 err = __sctp_connect(sk, kaddrs, addrs_size, flags, assoc_id);
1358 * This is an older interface. It's kept for backward compatibility
1359 * to the option that doesn't provide association id.
1361 static int sctp_setsockopt_connectx_old(struct sock *sk,
1362 struct sockaddr __user *addrs,
1365 return __sctp_setsockopt_connectx(sk, addrs, addrs_size, NULL);
1369 * New interface for the API. The since the API is done with a socket
1370 * option, to make it simple we feed back the association id is as a return
1371 * indication to the call. Error is always negative and association id is
1374 static int sctp_setsockopt_connectx(struct sock *sk,
1375 struct sockaddr __user *addrs,
1378 sctp_assoc_t assoc_id = 0;
1381 err = __sctp_setsockopt_connectx(sk, addrs, addrs_size, &assoc_id);
1390 * New (hopefully final) interface for the API.
1391 * We use the sctp_getaddrs_old structure so that use-space library
1392 * can avoid any unnecessary allocations. The only different part
1393 * is that we store the actual length of the address buffer into the
1394 * addrs_num structure member. That way we can re-use the existing
1397 #ifdef CONFIG_COMPAT
1398 struct compat_sctp_getaddrs_old {
1399 sctp_assoc_t assoc_id;
1401 compat_uptr_t addrs; /* struct sockaddr * */
1405 static int sctp_getsockopt_connectx3(struct sock *sk, int len,
1406 char __user *optval,
1409 struct sctp_getaddrs_old param;
1410 sctp_assoc_t assoc_id = 0;
1413 #ifdef CONFIG_COMPAT
1414 if (in_compat_syscall()) {
1415 struct compat_sctp_getaddrs_old param32;
1417 if (len < sizeof(param32))
1419 if (copy_from_user(¶m32, optval, sizeof(param32)))
1422 param.assoc_id = param32.assoc_id;
1423 param.addr_num = param32.addr_num;
1424 param.addrs = compat_ptr(param32.addrs);
1428 if (len < sizeof(param))
1430 if (copy_from_user(¶m, optval, sizeof(param)))
1434 err = __sctp_setsockopt_connectx(sk, (struct sockaddr __user *)
1435 param.addrs, param.addr_num,
1437 if (err == 0 || err == -EINPROGRESS) {
1438 if (copy_to_user(optval, &assoc_id, sizeof(assoc_id)))
1440 if (put_user(sizeof(assoc_id), optlen))
1447 /* API 3.1.4 close() - UDP Style Syntax
1448 * Applications use close() to perform graceful shutdown (as described in
1449 * Section 10.1 of [SCTP]) on ALL the associations currently represented
1450 * by a UDP-style socket.
1454 * ret = close(int sd);
1456 * sd - the socket descriptor of the associations to be closed.
1458 * To gracefully shutdown a specific association represented by the
1459 * UDP-style socket, an application should use the sendmsg() call,
1460 * passing no user data, but including the appropriate flag in the
1461 * ancillary data (see Section xxxx).
1463 * If sd in the close() call is a branched-off socket representing only
1464 * one association, the shutdown is performed on that association only.
1466 * 4.1.6 close() - TCP Style Syntax
1468 * Applications use close() to gracefully close down an association.
1472 * int close(int sd);
1474 * sd - the socket descriptor of the association to be closed.
1476 * After an application calls close() on a socket descriptor, no further
1477 * socket operations will succeed on that descriptor.
1479 * API 7.1.4 SO_LINGER
1481 * An application using the TCP-style socket can use this option to
1482 * perform the SCTP ABORT primitive. The linger option structure is:
1485 * int l_onoff; // option on/off
1486 * int l_linger; // linger time
1489 * To enable the option, set l_onoff to 1. If the l_linger value is set
1490 * to 0, calling close() is the same as the ABORT primitive. If the
1491 * value is set to a negative value, the setsockopt() call will return
1492 * an error. If the value is set to a positive value linger_time, the
1493 * close() can be blocked for at most linger_time ms. If the graceful
1494 * shutdown phase does not finish during this period, close() will
1495 * return but the graceful shutdown phase continues in the system.
1497 static void sctp_close(struct sock *sk, long timeout)
1499 struct net *net = sock_net(sk);
1500 struct sctp_endpoint *ep;
1501 struct sctp_association *asoc;
1502 struct list_head *pos, *temp;
1503 unsigned int data_was_unread;
1505 pr_debug("%s: sk:%p, timeout:%ld\n", __func__, sk, timeout);
1507 lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
1508 sk->sk_shutdown = SHUTDOWN_MASK;
1509 inet_sk_set_state(sk, SCTP_SS_CLOSING);
1511 ep = sctp_sk(sk)->ep;
1513 /* Clean up any skbs sitting on the receive queue. */
1514 data_was_unread = sctp_queue_purge_ulpevents(&sk->sk_receive_queue);
1515 data_was_unread += sctp_queue_purge_ulpevents(&sctp_sk(sk)->pd_lobby);
1517 /* Walk all associations on an endpoint. */
1518 list_for_each_safe(pos, temp, &ep->asocs) {
1519 asoc = list_entry(pos, struct sctp_association, asocs);
1521 if (sctp_style(sk, TCP)) {
1522 /* A closed association can still be in the list if
1523 * it belongs to a TCP-style listening socket that is
1524 * not yet accepted. If so, free it. If not, send an
1525 * ABORT or SHUTDOWN based on the linger options.
1527 if (sctp_state(asoc, CLOSED)) {
1528 sctp_association_free(asoc);
1533 if (data_was_unread || !skb_queue_empty(&asoc->ulpq.lobby) ||
1534 !skb_queue_empty(&asoc->ulpq.reasm) ||
1535 !skb_queue_empty(&asoc->ulpq.reasm_uo) ||
1536 (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime)) {
1537 struct sctp_chunk *chunk;
1539 chunk = sctp_make_abort_user(asoc, NULL, 0);
1540 sctp_primitive_ABORT(net, asoc, chunk);
1542 sctp_primitive_SHUTDOWN(net, asoc, NULL);
1545 /* On a TCP-style socket, block for at most linger_time if set. */
1546 if (sctp_style(sk, TCP) && timeout)
1547 sctp_wait_for_close(sk, timeout);
1549 /* This will run the backlog queue. */
1552 /* Supposedly, no process has access to the socket, but
1553 * the net layers still may.
1554 * Also, sctp_destroy_sock() needs to be called with addr_wq_lock
1555 * held and that should be grabbed before socket lock.
1557 spin_lock_bh(&net->sctp.addr_wq_lock);
1558 bh_lock_sock_nested(sk);
1560 /* Hold the sock, since sk_common_release() will put sock_put()
1561 * and we have just a little more cleanup.
1564 sk_common_release(sk);
1567 spin_unlock_bh(&net->sctp.addr_wq_lock);
1571 SCTP_DBG_OBJCNT_DEC(sock);
1574 /* Handle EPIPE error. */
1575 static int sctp_error(struct sock *sk, int flags, int err)
1578 err = sock_error(sk) ? : -EPIPE;
1579 if (err == -EPIPE && !(flags & MSG_NOSIGNAL))
1580 send_sig(SIGPIPE, current, 0);
1584 /* API 3.1.3 sendmsg() - UDP Style Syntax
1586 * An application uses sendmsg() and recvmsg() calls to transmit data to
1587 * and receive data from its peer.
1589 * ssize_t sendmsg(int socket, const struct msghdr *message,
1592 * socket - the socket descriptor of the endpoint.
1593 * message - pointer to the msghdr structure which contains a single
1594 * user message and possibly some ancillary data.
1596 * See Section 5 for complete description of the data
1599 * flags - flags sent or received with the user message, see Section
1600 * 5 for complete description of the flags.
1602 * Note: This function could use a rewrite especially when explicit
1603 * connect support comes in.
1605 /* BUG: We do not implement the equivalent of sk_stream_wait_memory(). */
1607 static int sctp_msghdr_parse(const struct msghdr *msg,
1608 struct sctp_cmsgs *cmsgs);
1610 static int sctp_sendmsg_parse(struct sock *sk, struct sctp_cmsgs *cmsgs,
1611 struct sctp_sndrcvinfo *srinfo,
1612 const struct msghdr *msg, size_t msg_len)
1617 if (sctp_sstate(sk, LISTENING) && sctp_style(sk, TCP))
1620 if (msg_len > sk->sk_sndbuf)
1623 memset(cmsgs, 0, sizeof(*cmsgs));
1624 err = sctp_msghdr_parse(msg, cmsgs);
1626 pr_debug("%s: msghdr parse err:%x\n", __func__, err);
1630 memset(srinfo, 0, sizeof(*srinfo));
1631 if (cmsgs->srinfo) {
1632 srinfo->sinfo_stream = cmsgs->srinfo->sinfo_stream;
1633 srinfo->sinfo_flags = cmsgs->srinfo->sinfo_flags;
1634 srinfo->sinfo_ppid = cmsgs->srinfo->sinfo_ppid;
1635 srinfo->sinfo_context = cmsgs->srinfo->sinfo_context;
1636 srinfo->sinfo_assoc_id = cmsgs->srinfo->sinfo_assoc_id;
1637 srinfo->sinfo_timetolive = cmsgs->srinfo->sinfo_timetolive;
1641 srinfo->sinfo_stream = cmsgs->sinfo->snd_sid;
1642 srinfo->sinfo_flags = cmsgs->sinfo->snd_flags;
1643 srinfo->sinfo_ppid = cmsgs->sinfo->snd_ppid;
1644 srinfo->sinfo_context = cmsgs->sinfo->snd_context;
1645 srinfo->sinfo_assoc_id = cmsgs->sinfo->snd_assoc_id;
1648 if (cmsgs->prinfo) {
1649 srinfo->sinfo_timetolive = cmsgs->prinfo->pr_value;
1650 SCTP_PR_SET_POLICY(srinfo->sinfo_flags,
1651 cmsgs->prinfo->pr_policy);
1654 sflags = srinfo->sinfo_flags;
1655 if (!sflags && msg_len)
1658 if (sctp_style(sk, TCP) && (sflags & (SCTP_EOF | SCTP_ABORT)))
1661 if (((sflags & SCTP_EOF) && msg_len > 0) ||
1662 (!(sflags & (SCTP_EOF | SCTP_ABORT)) && msg_len == 0))
1665 if ((sflags & SCTP_ADDR_OVER) && !msg->msg_name)
1671 static int sctp_sendmsg_new_asoc(struct sock *sk, __u16 sflags,
1672 struct sctp_cmsgs *cmsgs,
1673 union sctp_addr *daddr,
1674 struct sctp_transport **tp)
1676 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
1677 struct net *net = sock_net(sk);
1678 struct sctp_association *asoc;
1679 enum sctp_scope scope;
1680 struct cmsghdr *cmsg;
1681 __be32 flowinfo = 0;
1687 if (sflags & (SCTP_EOF | SCTP_ABORT))
1690 if (sctp_style(sk, TCP) && (sctp_sstate(sk, ESTABLISHED) ||
1691 sctp_sstate(sk, CLOSING)))
1692 return -EADDRNOTAVAIL;
1694 if (sctp_endpoint_is_peeled_off(ep, daddr))
1695 return -EADDRNOTAVAIL;
1697 if (!ep->base.bind_addr.port) {
1698 if (sctp_autobind(sk))
1701 if (ep->base.bind_addr.port < inet_prot_sock(net) &&
1702 !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
1706 scope = sctp_scope(daddr);
1708 /* Label connection socket for first association 1-to-many
1709 * style for client sequence socket()->sendmsg(). This
1710 * needs to be done before sctp_assoc_add_peer() as that will
1711 * set up the initial packet that needs to account for any
1712 * security ip options (CIPSO/CALIPSO) added to the packet.
1714 af = sctp_get_af_specific(daddr->sa.sa_family);
1717 err = security_sctp_bind_connect(sk, SCTP_SENDMSG_CONNECT,
1718 (struct sockaddr *)daddr,
1723 asoc = sctp_association_new(ep, sk, scope, GFP_KERNEL);
1727 if (sctp_assoc_set_bind_addr_from_ep(asoc, scope, GFP_KERNEL) < 0) {
1733 struct sctp_initmsg *init = cmsgs->init;
1735 if (init->sinit_num_ostreams) {
1736 __u16 outcnt = init->sinit_num_ostreams;
1738 asoc->c.sinit_num_ostreams = outcnt;
1739 /* outcnt has been changed, need to re-init stream */
1740 err = sctp_stream_init(&asoc->stream, outcnt, 0,
1746 if (init->sinit_max_instreams)
1747 asoc->c.sinit_max_instreams = init->sinit_max_instreams;
1749 if (init->sinit_max_attempts)
1750 asoc->max_init_attempts = init->sinit_max_attempts;
1752 if (init->sinit_max_init_timeo)
1753 asoc->max_init_timeo =
1754 msecs_to_jiffies(init->sinit_max_init_timeo);
1757 *tp = sctp_assoc_add_peer(asoc, daddr, GFP_KERNEL, SCTP_UNKNOWN);
1763 if (!cmsgs->addrs_msg)
1766 if (daddr->sa.sa_family == AF_INET6)
1767 flowinfo = daddr->v6.sin6_flowinfo;
1769 /* sendv addr list parse */
1770 for_each_cmsghdr(cmsg, cmsgs->addrs_msg) {
1771 struct sctp_transport *transport;
1772 struct sctp_association *old;
1773 union sctp_addr _daddr;
1776 if (cmsg->cmsg_level != IPPROTO_SCTP ||
1777 (cmsg->cmsg_type != SCTP_DSTADDRV4 &&
1778 cmsg->cmsg_type != SCTP_DSTADDRV6))
1782 memset(daddr, 0, sizeof(*daddr));
1783 dlen = cmsg->cmsg_len - sizeof(struct cmsghdr);
1784 if (cmsg->cmsg_type == SCTP_DSTADDRV4) {
1785 if (dlen < sizeof(struct in_addr)) {
1790 dlen = sizeof(struct in_addr);
1791 daddr->v4.sin_family = AF_INET;
1792 daddr->v4.sin_port = htons(asoc->peer.port);
1793 memcpy(&daddr->v4.sin_addr, CMSG_DATA(cmsg), dlen);
1795 if (dlen < sizeof(struct in6_addr)) {
1800 dlen = sizeof(struct in6_addr);
1801 daddr->v6.sin6_flowinfo = flowinfo;
1802 daddr->v6.sin6_family = AF_INET6;
1803 daddr->v6.sin6_port = htons(asoc->peer.port);
1804 memcpy(&daddr->v6.sin6_addr, CMSG_DATA(cmsg), dlen);
1806 err = sctp_verify_addr(sk, daddr, sizeof(*daddr));
1810 old = sctp_endpoint_lookup_assoc(ep, daddr, &transport);
1811 if (old && old != asoc) {
1812 if (old->state >= SCTP_STATE_ESTABLISHED)
1819 if (sctp_endpoint_is_peeled_off(ep, daddr)) {
1820 err = -EADDRNOTAVAIL;
1824 transport = sctp_assoc_add_peer(asoc, daddr, GFP_KERNEL,
1835 sctp_association_free(asoc);
1839 static int sctp_sendmsg_check_sflags(struct sctp_association *asoc,
1840 __u16 sflags, struct msghdr *msg,
1843 struct sock *sk = asoc->base.sk;
1844 struct net *net = sock_net(sk);
1846 if (sctp_state(asoc, CLOSED) && sctp_style(sk, TCP))
1849 if ((sflags & SCTP_SENDALL) && sctp_style(sk, UDP) &&
1850 !sctp_state(asoc, ESTABLISHED))
1853 if (sflags & SCTP_EOF) {
1854 pr_debug("%s: shutting down association:%p\n", __func__, asoc);
1855 sctp_primitive_SHUTDOWN(net, asoc, NULL);
1860 if (sflags & SCTP_ABORT) {
1861 struct sctp_chunk *chunk;
1863 chunk = sctp_make_abort_user(asoc, msg, msg_len);
1867 pr_debug("%s: aborting association:%p\n", __func__, asoc);
1868 sctp_primitive_ABORT(net, asoc, chunk);
1876 static int sctp_sendmsg_to_asoc(struct sctp_association *asoc,
1877 struct msghdr *msg, size_t msg_len,
1878 struct sctp_transport *transport,
1879 struct sctp_sndrcvinfo *sinfo)
1881 struct sock *sk = asoc->base.sk;
1882 struct sctp_sock *sp = sctp_sk(sk);
1883 struct net *net = sock_net(sk);
1884 struct sctp_datamsg *datamsg;
1885 bool wait_connect = false;
1886 struct sctp_chunk *chunk;
1890 if (sinfo->sinfo_stream >= asoc->stream.outcnt) {
1895 if (unlikely(!SCTP_SO(&asoc->stream, sinfo->sinfo_stream)->ext)) {
1896 err = sctp_stream_init_ext(&asoc->stream, sinfo->sinfo_stream);
1901 if (sp->disable_fragments && msg_len > asoc->frag_point) {
1906 if (asoc->pmtu_pending) {
1907 if (sp->param_flags & SPP_PMTUD_ENABLE)
1908 sctp_assoc_sync_pmtu(asoc);
1909 asoc->pmtu_pending = 0;
1912 if (sctp_wspace(asoc) < (int)msg_len)
1913 sctp_prsctp_prune(asoc, sinfo, msg_len - sctp_wspace(asoc));
1915 if (sctp_wspace(asoc) <= 0) {
1916 timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT);
1917 err = sctp_wait_for_sndbuf(asoc, &timeo, msg_len);
1922 if (sctp_state(asoc, CLOSED)) {
1923 err = sctp_primitive_ASSOCIATE(net, asoc, NULL);
1927 if (sp->strm_interleave) {
1928 timeo = sock_sndtimeo(sk, 0);
1929 err = sctp_wait_for_connect(asoc, &timeo);
1935 wait_connect = true;
1938 pr_debug("%s: we associated primitively\n", __func__);
1941 datamsg = sctp_datamsg_from_user(asoc, sinfo, &msg->msg_iter);
1942 if (IS_ERR(datamsg)) {
1943 err = PTR_ERR(datamsg);
1947 asoc->force_delay = !!(msg->msg_flags & MSG_MORE);
1949 list_for_each_entry(chunk, &datamsg->chunks, frag_list) {
1950 sctp_chunk_hold(chunk);
1951 sctp_set_owner_w(chunk);
1952 chunk->transport = transport;
1955 err = sctp_primitive_SEND(net, asoc, datamsg);
1957 sctp_datamsg_free(datamsg);
1961 pr_debug("%s: we sent primitively\n", __func__);
1963 sctp_datamsg_put(datamsg);
1965 if (unlikely(wait_connect)) {
1966 timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT);
1967 sctp_wait_for_connect(asoc, &timeo);
1976 static union sctp_addr *sctp_sendmsg_get_daddr(struct sock *sk,
1977 const struct msghdr *msg,
1978 struct sctp_cmsgs *cmsgs)
1980 union sctp_addr *daddr = NULL;
1983 if (!sctp_style(sk, UDP_HIGH_BANDWIDTH) && msg->msg_name) {
1984 int len = msg->msg_namelen;
1986 if (len > sizeof(*daddr))
1987 len = sizeof(*daddr);
1989 daddr = (union sctp_addr *)msg->msg_name;
1991 err = sctp_verify_addr(sk, daddr, len);
1993 return ERR_PTR(err);
1999 static void sctp_sendmsg_update_sinfo(struct sctp_association *asoc,
2000 struct sctp_sndrcvinfo *sinfo,
2001 struct sctp_cmsgs *cmsgs)
2003 if (!cmsgs->srinfo && !cmsgs->sinfo) {
2004 sinfo->sinfo_stream = asoc->default_stream;
2005 sinfo->sinfo_ppid = asoc->default_ppid;
2006 sinfo->sinfo_context = asoc->default_context;
2007 sinfo->sinfo_assoc_id = sctp_assoc2id(asoc);
2010 sinfo->sinfo_flags = asoc->default_flags;
2013 if (!cmsgs->srinfo && !cmsgs->prinfo)
2014 sinfo->sinfo_timetolive = asoc->default_timetolive;
2016 if (cmsgs->authinfo) {
2017 /* Reuse sinfo_tsn to indicate that authinfo was set and
2018 * sinfo_ssn to save the keyid on tx path.
2020 sinfo->sinfo_tsn = 1;
2021 sinfo->sinfo_ssn = cmsgs->authinfo->auth_keynumber;
2025 static int sctp_sendmsg(struct sock *sk, struct msghdr *msg, size_t msg_len)
2027 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
2028 struct sctp_transport *transport = NULL;
2029 struct sctp_sndrcvinfo _sinfo, *sinfo;
2030 struct sctp_association *asoc;
2031 struct sctp_cmsgs cmsgs;
2032 union sctp_addr *daddr;
2037 /* Parse and get snd_info */
2038 err = sctp_sendmsg_parse(sk, &cmsgs, &_sinfo, msg, msg_len);
2043 sflags = sinfo->sinfo_flags;
2045 /* Get daddr from msg */
2046 daddr = sctp_sendmsg_get_daddr(sk, msg, &cmsgs);
2047 if (IS_ERR(daddr)) {
2048 err = PTR_ERR(daddr);
2054 /* SCTP_SENDALL process */
2055 if ((sflags & SCTP_SENDALL) && sctp_style(sk, UDP)) {
2056 list_for_each_entry(asoc, &ep->asocs, asocs) {
2057 err = sctp_sendmsg_check_sflags(asoc, sflags, msg,
2064 sctp_sendmsg_update_sinfo(asoc, sinfo, &cmsgs);
2066 err = sctp_sendmsg_to_asoc(asoc, msg, msg_len,
2071 iov_iter_revert(&msg->msg_iter, err);
2077 /* Get and check or create asoc */
2079 asoc = sctp_endpoint_lookup_assoc(ep, daddr, &transport);
2081 err = sctp_sendmsg_check_sflags(asoc, sflags, msg,
2086 err = sctp_sendmsg_new_asoc(sk, sflags, &cmsgs, daddr,
2091 asoc = transport->asoc;
2095 if (!sctp_style(sk, TCP) && !(sflags & SCTP_ADDR_OVER))
2098 asoc = sctp_id2assoc(sk, sinfo->sinfo_assoc_id);
2104 err = sctp_sendmsg_check_sflags(asoc, sflags, msg, msg_len);
2109 /* Update snd_info with the asoc */
2110 sctp_sendmsg_update_sinfo(asoc, sinfo, &cmsgs);
2112 /* Send msg to the asoc */
2113 err = sctp_sendmsg_to_asoc(asoc, msg, msg_len, transport, sinfo);
2114 if (err < 0 && err != -ESRCH && new)
2115 sctp_association_free(asoc);
2120 return sctp_error(sk, msg->msg_flags, err);
2123 /* This is an extended version of skb_pull() that removes the data from the
2124 * start of a skb even when data is spread across the list of skb's in the
2125 * frag_list. len specifies the total amount of data that needs to be removed.
2126 * when 'len' bytes could be removed from the skb, it returns 0.
2127 * If 'len' exceeds the total skb length, it returns the no. of bytes that
2128 * could not be removed.
2130 static int sctp_skb_pull(struct sk_buff *skb, int len)
2132 struct sk_buff *list;
2133 int skb_len = skb_headlen(skb);
2136 if (len <= skb_len) {
2137 __skb_pull(skb, len);
2141 __skb_pull(skb, skb_len);
2143 skb_walk_frags(skb, list) {
2144 rlen = sctp_skb_pull(list, len);
2145 skb->len -= (len-rlen);
2146 skb->data_len -= (len-rlen);
2157 /* API 3.1.3 recvmsg() - UDP Style Syntax
2159 * ssize_t recvmsg(int socket, struct msghdr *message,
2162 * socket - the socket descriptor of the endpoint.
2163 * message - pointer to the msghdr structure which contains a single
2164 * user message and possibly some ancillary data.
2166 * See Section 5 for complete description of the data
2169 * flags - flags sent or received with the user message, see Section
2170 * 5 for complete description of the flags.
2172 static int sctp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
2173 int noblock, int flags, int *addr_len)
2175 struct sctp_ulpevent *event = NULL;
2176 struct sctp_sock *sp = sctp_sk(sk);
2177 struct sk_buff *skb, *head_skb;
2182 pr_debug("%s: sk:%p, msghdr:%p, len:%zd, noblock:%d, flags:0x%x, "
2183 "addr_len:%p)\n", __func__, sk, msg, len, noblock, flags,
2188 if (sctp_style(sk, TCP) && !sctp_sstate(sk, ESTABLISHED) &&
2189 !sctp_sstate(sk, CLOSING) && !sctp_sstate(sk, CLOSED)) {
2194 skb = sctp_skb_recv_datagram(sk, flags, noblock, &err);
2198 /* Get the total length of the skb including any skb's in the
2207 err = skb_copy_datagram_msg(skb, 0, msg, copied);
2209 event = sctp_skb2event(skb);
2214 if (event->chunk && event->chunk->head_skb)
2215 head_skb = event->chunk->head_skb;
2218 sock_recv_ts_and_drops(msg, sk, head_skb);
2219 if (sctp_ulpevent_is_notification(event)) {
2220 msg->msg_flags |= MSG_NOTIFICATION;
2221 sp->pf->event_msgname(event, msg->msg_name, addr_len);
2223 sp->pf->skb_msgname(head_skb, msg->msg_name, addr_len);
2226 /* Check if we allow SCTP_NXTINFO. */
2227 if (sp->recvnxtinfo)
2228 sctp_ulpevent_read_nxtinfo(event, msg, sk);
2229 /* Check if we allow SCTP_RCVINFO. */
2230 if (sp->recvrcvinfo)
2231 sctp_ulpevent_read_rcvinfo(event, msg);
2232 /* Check if we allow SCTP_SNDRCVINFO. */
2233 if (sctp_ulpevent_type_enabled(sp->subscribe, SCTP_DATA_IO_EVENT))
2234 sctp_ulpevent_read_sndrcvinfo(event, msg);
2238 /* If skb's length exceeds the user's buffer, update the skb and
2239 * push it back to the receive_queue so that the next call to
2240 * recvmsg() will return the remaining data. Don't set MSG_EOR.
2242 if (skb_len > copied) {
2243 msg->msg_flags &= ~MSG_EOR;
2244 if (flags & MSG_PEEK)
2246 sctp_skb_pull(skb, copied);
2247 skb_queue_head(&sk->sk_receive_queue, skb);
2249 /* When only partial message is copied to the user, increase
2250 * rwnd by that amount. If all the data in the skb is read,
2251 * rwnd is updated when the event is freed.
2253 if (!sctp_ulpevent_is_notification(event))
2254 sctp_assoc_rwnd_increase(event->asoc, copied);
2256 } else if ((event->msg_flags & MSG_NOTIFICATION) ||
2257 (event->msg_flags & MSG_EOR))
2258 msg->msg_flags |= MSG_EOR;
2260 msg->msg_flags &= ~MSG_EOR;
2263 if (flags & MSG_PEEK) {
2264 /* Release the skb reference acquired after peeking the skb in
2265 * sctp_skb_recv_datagram().
2269 /* Free the event which includes releasing the reference to
2270 * the owner of the skb, freeing the skb and updating the
2273 sctp_ulpevent_free(event);
2280 /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS)
2282 * This option is a on/off flag. If enabled no SCTP message
2283 * fragmentation will be performed. Instead if a message being sent
2284 * exceeds the current PMTU size, the message will NOT be sent and
2285 * instead a error will be indicated to the user.
2287 static int sctp_setsockopt_disable_fragments(struct sock *sk,
2288 char __user *optval,
2289 unsigned int optlen)
2293 if (optlen < sizeof(int))
2296 if (get_user(val, (int __user *)optval))
2299 sctp_sk(sk)->disable_fragments = (val == 0) ? 0 : 1;
2304 static int sctp_setsockopt_events(struct sock *sk, char __user *optval,
2305 unsigned int optlen)
2307 struct sctp_event_subscribe subscribe;
2308 __u8 *sn_type = (__u8 *)&subscribe;
2309 struct sctp_sock *sp = sctp_sk(sk);
2310 struct sctp_association *asoc;
2313 if (optlen > sizeof(struct sctp_event_subscribe))
2316 if (copy_from_user(&subscribe, optval, optlen))
2319 for (i = 0; i < optlen; i++)
2320 sctp_ulpevent_type_set(&sp->subscribe, SCTP_SN_TYPE_BASE + i,
2323 list_for_each_entry(asoc, &sp->ep->asocs, asocs)
2324 asoc->subscribe = sctp_sk(sk)->subscribe;
2326 /* At the time when a user app subscribes to SCTP_SENDER_DRY_EVENT,
2327 * if there is no data to be sent or retransmit, the stack will
2328 * immediately send up this notification.
2330 if (sctp_ulpevent_type_enabled(sp->subscribe, SCTP_SENDER_DRY_EVENT)) {
2331 struct sctp_ulpevent *event;
2333 asoc = sctp_id2assoc(sk, 0);
2334 if (asoc && sctp_outq_is_empty(&asoc->outqueue)) {
2335 event = sctp_ulpevent_make_sender_dry_event(asoc,
2336 GFP_USER | __GFP_NOWARN);
2340 asoc->stream.si->enqueue_event(&asoc->ulpq, event);
2347 /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE)
2349 * This socket option is applicable to the UDP-style socket only. When
2350 * set it will cause associations that are idle for more than the
2351 * specified number of seconds to automatically close. An association
2352 * being idle is defined an association that has NOT sent or received
2353 * user data. The special value of '0' indicates that no automatic
2354 * close of any associations should be performed. The option expects an
2355 * integer defining the number of seconds of idle time before an
2356 * association is closed.
2358 static int sctp_setsockopt_autoclose(struct sock *sk, char __user *optval,
2359 unsigned int optlen)
2361 struct sctp_sock *sp = sctp_sk(sk);
2362 struct net *net = sock_net(sk);
2364 /* Applicable to UDP-style socket only */
2365 if (sctp_style(sk, TCP))
2367 if (optlen != sizeof(int))
2369 if (copy_from_user(&sp->autoclose, optval, optlen))
2372 if (sp->autoclose > net->sctp.max_autoclose)
2373 sp->autoclose = net->sctp.max_autoclose;
2378 /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS)
2380 * Applications can enable or disable heartbeats for any peer address of
2381 * an association, modify an address's heartbeat interval, force a
2382 * heartbeat to be sent immediately, and adjust the address's maximum
2383 * number of retransmissions sent before an address is considered
2384 * unreachable. The following structure is used to access and modify an
2385 * address's parameters:
2387 * struct sctp_paddrparams {
2388 * sctp_assoc_t spp_assoc_id;
2389 * struct sockaddr_storage spp_address;
2390 * uint32_t spp_hbinterval;
2391 * uint16_t spp_pathmaxrxt;
2392 * uint32_t spp_pathmtu;
2393 * uint32_t spp_sackdelay;
2394 * uint32_t spp_flags;
2395 * uint32_t spp_ipv6_flowlabel;
2399 * spp_assoc_id - (one-to-many style socket) This is filled in the
2400 * application, and identifies the association for
2402 * spp_address - This specifies which address is of interest.
2403 * spp_hbinterval - This contains the value of the heartbeat interval,
2404 * in milliseconds. If a value of zero
2405 * is present in this field then no changes are to
2406 * be made to this parameter.
2407 * spp_pathmaxrxt - This contains the maximum number of
2408 * retransmissions before this address shall be
2409 * considered unreachable. If a value of zero
2410 * is present in this field then no changes are to
2411 * be made to this parameter.
2412 * spp_pathmtu - When Path MTU discovery is disabled the value
2413 * specified here will be the "fixed" path mtu.
2414 * Note that if the spp_address field is empty
2415 * then all associations on this address will
2416 * have this fixed path mtu set upon them.
2418 * spp_sackdelay - When delayed sack is enabled, this value specifies
2419 * the number of milliseconds that sacks will be delayed
2420 * for. This value will apply to all addresses of an
2421 * association if the spp_address field is empty. Note
2422 * also, that if delayed sack is enabled and this
2423 * value is set to 0, no change is made to the last
2424 * recorded delayed sack timer value.
2426 * spp_flags - These flags are used to control various features
2427 * on an association. The flag field may contain
2428 * zero or more of the following options.
2430 * SPP_HB_ENABLE - Enable heartbeats on the
2431 * specified address. Note that if the address
2432 * field is empty all addresses for the association
2433 * have heartbeats enabled upon them.
2435 * SPP_HB_DISABLE - Disable heartbeats on the
2436 * speicifed address. Note that if the address
2437 * field is empty all addresses for the association
2438 * will have their heartbeats disabled. Note also
2439 * that SPP_HB_ENABLE and SPP_HB_DISABLE are
2440 * mutually exclusive, only one of these two should
2441 * be specified. Enabling both fields will have
2442 * undetermined results.
2444 * SPP_HB_DEMAND - Request a user initiated heartbeat
2445 * to be made immediately.
2447 * SPP_HB_TIME_IS_ZERO - Specify's that the time for
2448 * heartbeat delayis to be set to the value of 0
2451 * SPP_PMTUD_ENABLE - This field will enable PMTU
2452 * discovery upon the specified address. Note that
2453 * if the address feild is empty then all addresses
2454 * on the association are effected.
2456 * SPP_PMTUD_DISABLE - This field will disable PMTU
2457 * discovery upon the specified address. Note that
2458 * if the address feild is empty then all addresses
2459 * on the association are effected. Not also that
2460 * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually
2461 * exclusive. Enabling both will have undetermined
2464 * SPP_SACKDELAY_ENABLE - Setting this flag turns
2465 * on delayed sack. The time specified in spp_sackdelay
2466 * is used to specify the sack delay for this address. Note
2467 * that if spp_address is empty then all addresses will
2468 * enable delayed sack and take on the sack delay
2469 * value specified in spp_sackdelay.
2470 * SPP_SACKDELAY_DISABLE - Setting this flag turns
2471 * off delayed sack. If the spp_address field is blank then
2472 * delayed sack is disabled for the entire association. Note
2473 * also that this field is mutually exclusive to
2474 * SPP_SACKDELAY_ENABLE, setting both will have undefined
2477 * SPP_IPV6_FLOWLABEL: Setting this flag enables the
2478 * setting of the IPV6 flow label value. The value is
2479 * contained in the spp_ipv6_flowlabel field.
2480 * Upon retrieval, this flag will be set to indicate that
2481 * the spp_ipv6_flowlabel field has a valid value returned.
2482 * If a specific destination address is set (in the
2483 * spp_address field), then the value returned is that of
2484 * the address. If just an association is specified (and
2485 * no address), then the association's default flow label
2486 * is returned. If neither an association nor a destination
2487 * is specified, then the socket's default flow label is
2488 * returned. For non-IPv6 sockets, this flag will be left
2491 * SPP_DSCP: Setting this flag enables the setting of the
2492 * Differentiated Services Code Point (DSCP) value
2493 * associated with either the association or a specific
2494 * address. The value is obtained in the spp_dscp field.
2495 * Upon retrieval, this flag will be set to indicate that
2496 * the spp_dscp field has a valid value returned. If a
2497 * specific destination address is set when called (in the
2498 * spp_address field), then that specific destination
2499 * address's DSCP value is returned. If just an association
2500 * is specified, then the association's default DSCP is
2501 * returned. If neither an association nor a destination is
2502 * specified, then the socket's default DSCP is returned.
2504 * spp_ipv6_flowlabel
2505 * - This field is used in conjunction with the
2506 * SPP_IPV6_FLOWLABEL flag and contains the IPv6 flow label.
2507 * The 20 least significant bits are used for the flow
2508 * label. This setting has precedence over any IPv6-layer
2511 * spp_dscp - This field is used in conjunction with the SPP_DSCP flag
2512 * and contains the DSCP. The 6 most significant bits are
2513 * used for the DSCP. This setting has precedence over any
2514 * IPv4- or IPv6- layer setting.
2516 static int sctp_apply_peer_addr_params(struct sctp_paddrparams *params,
2517 struct sctp_transport *trans,
2518 struct sctp_association *asoc,
2519 struct sctp_sock *sp,
2522 int sackdelay_change)
2526 if (params->spp_flags & SPP_HB_DEMAND && trans) {
2527 struct net *net = sock_net(trans->asoc->base.sk);
2529 error = sctp_primitive_REQUESTHEARTBEAT(net, trans->asoc, trans);
2534 /* Note that unless the spp_flag is set to SPP_HB_ENABLE the value of
2535 * this field is ignored. Note also that a value of zero indicates
2536 * the current setting should be left unchanged.
2538 if (params->spp_flags & SPP_HB_ENABLE) {
2540 /* Re-zero the interval if the SPP_HB_TIME_IS_ZERO is
2541 * set. This lets us use 0 value when this flag
2544 if (params->spp_flags & SPP_HB_TIME_IS_ZERO)
2545 params->spp_hbinterval = 0;
2547 if (params->spp_hbinterval ||
2548 (params->spp_flags & SPP_HB_TIME_IS_ZERO)) {
2551 msecs_to_jiffies(params->spp_hbinterval);
2554 msecs_to_jiffies(params->spp_hbinterval);
2556 sp->hbinterval = params->spp_hbinterval;
2563 trans->param_flags =
2564 (trans->param_flags & ~SPP_HB) | hb_change;
2567 (asoc->param_flags & ~SPP_HB) | hb_change;
2570 (sp->param_flags & ~SPP_HB) | hb_change;
2574 /* When Path MTU discovery is disabled the value specified here will
2575 * be the "fixed" path mtu (i.e. the value of the spp_flags field must
2576 * include the flag SPP_PMTUD_DISABLE for this field to have any
2579 if ((params->spp_flags & SPP_PMTUD_DISABLE) && params->spp_pathmtu) {
2581 trans->pathmtu = params->spp_pathmtu;
2582 sctp_assoc_sync_pmtu(asoc);
2584 sctp_assoc_set_pmtu(asoc, params->spp_pathmtu);
2586 sp->pathmtu = params->spp_pathmtu;
2592 int update = (trans->param_flags & SPP_PMTUD_DISABLE) &&
2593 (params->spp_flags & SPP_PMTUD_ENABLE);
2594 trans->param_flags =
2595 (trans->param_flags & ~SPP_PMTUD) | pmtud_change;
2597 sctp_transport_pmtu(trans, sctp_opt2sk(sp));
2598 sctp_assoc_sync_pmtu(asoc);
2602 (asoc->param_flags & ~SPP_PMTUD) | pmtud_change;
2605 (sp->param_flags & ~SPP_PMTUD) | pmtud_change;
2609 /* Note that unless the spp_flag is set to SPP_SACKDELAY_ENABLE the
2610 * value of this field is ignored. Note also that a value of zero
2611 * indicates the current setting should be left unchanged.
2613 if ((params->spp_flags & SPP_SACKDELAY_ENABLE) && params->spp_sackdelay) {
2616 msecs_to_jiffies(params->spp_sackdelay);
2619 msecs_to_jiffies(params->spp_sackdelay);
2621 sp->sackdelay = params->spp_sackdelay;
2625 if (sackdelay_change) {
2627 trans->param_flags =
2628 (trans->param_flags & ~SPP_SACKDELAY) |
2632 (asoc->param_flags & ~SPP_SACKDELAY) |
2636 (sp->param_flags & ~SPP_SACKDELAY) |
2641 /* Note that a value of zero indicates the current setting should be
2644 if (params->spp_pathmaxrxt) {
2646 trans->pathmaxrxt = params->spp_pathmaxrxt;
2648 asoc->pathmaxrxt = params->spp_pathmaxrxt;
2650 sp->pathmaxrxt = params->spp_pathmaxrxt;
2654 if (params->spp_flags & SPP_IPV6_FLOWLABEL) {
2656 if (trans->ipaddr.sa.sa_family == AF_INET6) {
2657 trans->flowlabel = params->spp_ipv6_flowlabel &
2658 SCTP_FLOWLABEL_VAL_MASK;
2659 trans->flowlabel |= SCTP_FLOWLABEL_SET_MASK;
2662 struct sctp_transport *t;
2664 list_for_each_entry(t, &asoc->peer.transport_addr_list,
2666 if (t->ipaddr.sa.sa_family != AF_INET6)
2668 t->flowlabel = params->spp_ipv6_flowlabel &
2669 SCTP_FLOWLABEL_VAL_MASK;
2670 t->flowlabel |= SCTP_FLOWLABEL_SET_MASK;
2672 asoc->flowlabel = params->spp_ipv6_flowlabel &
2673 SCTP_FLOWLABEL_VAL_MASK;
2674 asoc->flowlabel |= SCTP_FLOWLABEL_SET_MASK;
2675 } else if (sctp_opt2sk(sp)->sk_family == AF_INET6) {
2676 sp->flowlabel = params->spp_ipv6_flowlabel &
2677 SCTP_FLOWLABEL_VAL_MASK;
2678 sp->flowlabel |= SCTP_FLOWLABEL_SET_MASK;
2682 if (params->spp_flags & SPP_DSCP) {
2684 trans->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK;
2685 trans->dscp |= SCTP_DSCP_SET_MASK;
2687 struct sctp_transport *t;
2689 list_for_each_entry(t, &asoc->peer.transport_addr_list,
2691 t->dscp = params->spp_dscp &
2693 t->dscp |= SCTP_DSCP_SET_MASK;
2695 asoc->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK;
2696 asoc->dscp |= SCTP_DSCP_SET_MASK;
2698 sp->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK;
2699 sp->dscp |= SCTP_DSCP_SET_MASK;
2706 static int sctp_setsockopt_peer_addr_params(struct sock *sk,
2707 char __user *optval,
2708 unsigned int optlen)
2710 struct sctp_paddrparams params;
2711 struct sctp_transport *trans = NULL;
2712 struct sctp_association *asoc = NULL;
2713 struct sctp_sock *sp = sctp_sk(sk);
2715 int hb_change, pmtud_change, sackdelay_change;
2717 if (optlen == sizeof(params)) {
2718 if (copy_from_user(¶ms, optval, optlen))
2720 } else if (optlen == ALIGN(offsetof(struct sctp_paddrparams,
2721 spp_ipv6_flowlabel), 4)) {
2722 if (copy_from_user(¶ms, optval, optlen))
2724 if (params.spp_flags & (SPP_DSCP | SPP_IPV6_FLOWLABEL))
2730 /* Validate flags and value parameters. */
2731 hb_change = params.spp_flags & SPP_HB;
2732 pmtud_change = params.spp_flags & SPP_PMTUD;
2733 sackdelay_change = params.spp_flags & SPP_SACKDELAY;
2735 if (hb_change == SPP_HB ||
2736 pmtud_change == SPP_PMTUD ||
2737 sackdelay_change == SPP_SACKDELAY ||
2738 params.spp_sackdelay > 500 ||
2739 (params.spp_pathmtu &&
2740 params.spp_pathmtu < SCTP_DEFAULT_MINSEGMENT))
2743 /* If an address other than INADDR_ANY is specified, and
2744 * no transport is found, then the request is invalid.
2746 if (!sctp_is_any(sk, (union sctp_addr *)¶ms.spp_address)) {
2747 trans = sctp_addr_id2transport(sk, ¶ms.spp_address,
2748 params.spp_assoc_id);
2753 /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
2754 * socket is a one to many style socket, and an association
2755 * was not found, then the id was invalid.
2757 asoc = sctp_id2assoc(sk, params.spp_assoc_id);
2758 if (!asoc && params.spp_assoc_id != SCTP_FUTURE_ASSOC &&
2759 sctp_style(sk, UDP))
2762 /* Heartbeat demand can only be sent on a transport or
2763 * association, but not a socket.
2765 if (params.spp_flags & SPP_HB_DEMAND && !trans && !asoc)
2768 /* Process parameters. */
2769 error = sctp_apply_peer_addr_params(¶ms, trans, asoc, sp,
2770 hb_change, pmtud_change,
2776 /* If changes are for association, also apply parameters to each
2779 if (!trans && asoc) {
2780 list_for_each_entry(trans, &asoc->peer.transport_addr_list,
2782 sctp_apply_peer_addr_params(¶ms, trans, asoc, sp,
2783 hb_change, pmtud_change,
2791 static inline __u32 sctp_spp_sackdelay_enable(__u32 param_flags)
2793 return (param_flags & ~SPP_SACKDELAY) | SPP_SACKDELAY_ENABLE;
2796 static inline __u32 sctp_spp_sackdelay_disable(__u32 param_flags)
2798 return (param_flags & ~SPP_SACKDELAY) | SPP_SACKDELAY_DISABLE;
2802 * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK)
2804 * This option will effect the way delayed acks are performed. This
2805 * option allows you to get or set the delayed ack time, in
2806 * milliseconds. It also allows changing the delayed ack frequency.
2807 * Changing the frequency to 1 disables the delayed sack algorithm. If
2808 * the assoc_id is 0, then this sets or gets the endpoints default
2809 * values. If the assoc_id field is non-zero, then the set or get
2810 * effects the specified association for the one to many model (the
2811 * assoc_id field is ignored by the one to one model). Note that if
2812 * sack_delay or sack_freq are 0 when setting this option, then the
2813 * current values will remain unchanged.
2815 * struct sctp_sack_info {
2816 * sctp_assoc_t sack_assoc_id;
2817 * uint32_t sack_delay;
2818 * uint32_t sack_freq;
2821 * sack_assoc_id - This parameter, indicates which association the user
2822 * is performing an action upon. Note that if this field's value is
2823 * zero then the endpoints default value is changed (effecting future
2824 * associations only).
2826 * sack_delay - This parameter contains the number of milliseconds that
2827 * the user is requesting the delayed ACK timer be set to. Note that
2828 * this value is defined in the standard to be between 200 and 500
2831 * sack_freq - This parameter contains the number of packets that must
2832 * be received before a sack is sent without waiting for the delay
2833 * timer to expire. The default value for this is 2, setting this
2834 * value to 1 will disable the delayed sack algorithm.
2837 static int sctp_setsockopt_delayed_ack(struct sock *sk,
2838 char __user *optval, unsigned int optlen)
2840 struct sctp_sack_info params;
2841 struct sctp_transport *trans = NULL;
2842 struct sctp_association *asoc = NULL;
2843 struct sctp_sock *sp = sctp_sk(sk);
2845 if (optlen == sizeof(struct sctp_sack_info)) {
2846 if (copy_from_user(¶ms, optval, optlen))
2849 if (params.sack_delay == 0 && params.sack_freq == 0)
2851 } else if (optlen == sizeof(struct sctp_assoc_value)) {
2852 pr_warn_ratelimited(DEPRECATED
2854 "Use of struct sctp_assoc_value in delayed_ack socket option.\n"
2855 "Use struct sctp_sack_info instead\n",
2856 current->comm, task_pid_nr(current));
2857 if (copy_from_user(¶ms, optval, optlen))
2860 if (params.sack_delay == 0)
2861 params.sack_freq = 1;
2863 params.sack_freq = 0;
2867 /* Validate value parameter. */
2868 if (params.sack_delay > 500)
2871 /* Get association, if sack_assoc_id != 0 and the socket is a one
2872 * to many style socket, and an association was not found, then
2873 * the id was invalid.
2875 asoc = sctp_id2assoc(sk, params.sack_assoc_id);
2876 if (!asoc && params.sack_assoc_id && sctp_style(sk, UDP))
2879 if (params.sack_delay) {
2882 msecs_to_jiffies(params.sack_delay);
2884 sctp_spp_sackdelay_enable(asoc->param_flags);
2886 sp->sackdelay = params.sack_delay;
2888 sctp_spp_sackdelay_enable(sp->param_flags);
2892 if (params.sack_freq == 1) {
2895 sctp_spp_sackdelay_disable(asoc->param_flags);
2898 sctp_spp_sackdelay_disable(sp->param_flags);
2900 } else if (params.sack_freq > 1) {
2902 asoc->sackfreq = params.sack_freq;
2904 sctp_spp_sackdelay_enable(asoc->param_flags);
2906 sp->sackfreq = params.sack_freq;
2908 sctp_spp_sackdelay_enable(sp->param_flags);
2912 /* If change is for association, also apply to each transport. */
2914 list_for_each_entry(trans, &asoc->peer.transport_addr_list,
2916 if (params.sack_delay) {
2918 msecs_to_jiffies(params.sack_delay);
2919 trans->param_flags =
2920 sctp_spp_sackdelay_enable(trans->param_flags);
2922 if (params.sack_freq == 1) {
2923 trans->param_flags =
2924 sctp_spp_sackdelay_disable(trans->param_flags);
2925 } else if (params.sack_freq > 1) {
2926 trans->sackfreq = params.sack_freq;
2927 trans->param_flags =
2928 sctp_spp_sackdelay_enable(trans->param_flags);
2936 /* 7.1.3 Initialization Parameters (SCTP_INITMSG)
2938 * Applications can specify protocol parameters for the default association
2939 * initialization. The option name argument to setsockopt() and getsockopt()
2942 * Setting initialization parameters is effective only on an unconnected
2943 * socket (for UDP-style sockets only future associations are effected
2944 * by the change). With TCP-style sockets, this option is inherited by
2945 * sockets derived from a listener socket.
2947 static int sctp_setsockopt_initmsg(struct sock *sk, char __user *optval, unsigned int optlen)
2949 struct sctp_initmsg sinit;
2950 struct sctp_sock *sp = sctp_sk(sk);
2952 if (optlen != sizeof(struct sctp_initmsg))
2954 if (copy_from_user(&sinit, optval, optlen))
2957 if (sinit.sinit_num_ostreams)
2958 sp->initmsg.sinit_num_ostreams = sinit.sinit_num_ostreams;
2959 if (sinit.sinit_max_instreams)
2960 sp->initmsg.sinit_max_instreams = sinit.sinit_max_instreams;
2961 if (sinit.sinit_max_attempts)
2962 sp->initmsg.sinit_max_attempts = sinit.sinit_max_attempts;
2963 if (sinit.sinit_max_init_timeo)
2964 sp->initmsg.sinit_max_init_timeo = sinit.sinit_max_init_timeo;
2970 * 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM)
2972 * Applications that wish to use the sendto() system call may wish to
2973 * specify a default set of parameters that would normally be supplied
2974 * through the inclusion of ancillary data. This socket option allows
2975 * such an application to set the default sctp_sndrcvinfo structure.
2976 * The application that wishes to use this socket option simply passes
2977 * in to this call the sctp_sndrcvinfo structure defined in Section
2978 * 5.2.2) The input parameters accepted by this call include
2979 * sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context,
2980 * sinfo_timetolive. The user must provide the sinfo_assoc_id field in
2981 * to this call if the caller is using the UDP model.
2983 static int sctp_setsockopt_default_send_param(struct sock *sk,
2984 char __user *optval,
2985 unsigned int optlen)
2987 struct sctp_sock *sp = sctp_sk(sk);
2988 struct sctp_association *asoc;
2989 struct sctp_sndrcvinfo info;
2991 if (optlen != sizeof(info))
2993 if (copy_from_user(&info, optval, optlen))
2995 if (info.sinfo_flags &
2996 ~(SCTP_UNORDERED | SCTP_ADDR_OVER |
2997 SCTP_ABORT | SCTP_EOF))
3000 asoc = sctp_id2assoc(sk, info.sinfo_assoc_id);
3001 if (!asoc && info.sinfo_assoc_id && sctp_style(sk, UDP))
3004 asoc->default_stream = info.sinfo_stream;
3005 asoc->default_flags = info.sinfo_flags;
3006 asoc->default_ppid = info.sinfo_ppid;
3007 asoc->default_context = info.sinfo_context;
3008 asoc->default_timetolive = info.sinfo_timetolive;
3010 sp->default_stream = info.sinfo_stream;
3011 sp->default_flags = info.sinfo_flags;
3012 sp->default_ppid = info.sinfo_ppid;
3013 sp->default_context = info.sinfo_context;
3014 sp->default_timetolive = info.sinfo_timetolive;
3020 /* RFC6458, Section 8.1.31. Set/get Default Send Parameters
3021 * (SCTP_DEFAULT_SNDINFO)
3023 static int sctp_setsockopt_default_sndinfo(struct sock *sk,
3024 char __user *optval,
3025 unsigned int optlen)
3027 struct sctp_sock *sp = sctp_sk(sk);
3028 struct sctp_association *asoc;
3029 struct sctp_sndinfo info;
3031 if (optlen != sizeof(info))
3033 if (copy_from_user(&info, optval, optlen))
3035 if (info.snd_flags &
3036 ~(SCTP_UNORDERED | SCTP_ADDR_OVER |
3037 SCTP_ABORT | SCTP_EOF))
3040 asoc = sctp_id2assoc(sk, info.snd_assoc_id);
3041 if (!asoc && info.snd_assoc_id && sctp_style(sk, UDP))
3044 asoc->default_stream = info.snd_sid;
3045 asoc->default_flags = info.snd_flags;
3046 asoc->default_ppid = info.snd_ppid;
3047 asoc->default_context = info.snd_context;
3049 sp->default_stream = info.snd_sid;
3050 sp->default_flags = info.snd_flags;
3051 sp->default_ppid = info.snd_ppid;
3052 sp->default_context = info.snd_context;
3058 /* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
3060 * Requests that the local SCTP stack use the enclosed peer address as
3061 * the association primary. The enclosed address must be one of the
3062 * association peer's addresses.
3064 static int sctp_setsockopt_primary_addr(struct sock *sk, char __user *optval,
3065 unsigned int optlen)
3067 struct sctp_prim prim;
3068 struct sctp_transport *trans;
3072 if (optlen != sizeof(struct sctp_prim))
3075 if (copy_from_user(&prim, optval, sizeof(struct sctp_prim)))
3078 /* Allow security module to validate address but need address len. */
3079 af = sctp_get_af_specific(prim.ssp_addr.ss_family);
3083 err = security_sctp_bind_connect(sk, SCTP_PRIMARY_ADDR,
3084 (struct sockaddr *)&prim.ssp_addr,
3089 trans = sctp_addr_id2transport(sk, &prim.ssp_addr, prim.ssp_assoc_id);
3093 sctp_assoc_set_primary(trans->asoc, trans);
3099 * 7.1.5 SCTP_NODELAY
3101 * Turn on/off any Nagle-like algorithm. This means that packets are
3102 * generally sent as soon as possible and no unnecessary delays are
3103 * introduced, at the cost of more packets in the network. Expects an
3104 * integer boolean flag.
3106 static int sctp_setsockopt_nodelay(struct sock *sk, char __user *optval,
3107 unsigned int optlen)
3111 if (optlen < sizeof(int))
3113 if (get_user(val, (int __user *)optval))
3116 sctp_sk(sk)->nodelay = (val == 0) ? 0 : 1;
3122 * 7.1.1 SCTP_RTOINFO
3124 * The protocol parameters used to initialize and bound retransmission
3125 * timeout (RTO) are tunable. sctp_rtoinfo structure is used to access
3126 * and modify these parameters.
3127 * All parameters are time values, in milliseconds. A value of 0, when
3128 * modifying the parameters, indicates that the current value should not
3132 static int sctp_setsockopt_rtoinfo(struct sock *sk, char __user *optval, unsigned int optlen)
3134 struct sctp_rtoinfo rtoinfo;
3135 struct sctp_association *asoc;
3136 unsigned long rto_min, rto_max;
3137 struct sctp_sock *sp = sctp_sk(sk);
3139 if (optlen != sizeof (struct sctp_rtoinfo))
3142 if (copy_from_user(&rtoinfo, optval, optlen))
3145 asoc = sctp_id2assoc(sk, rtoinfo.srto_assoc_id);
3147 /* Set the values to the specific association */
3148 if (!asoc && rtoinfo.srto_assoc_id != SCTP_FUTURE_ASSOC &&
3149 sctp_style(sk, UDP))
3152 rto_max = rtoinfo.srto_max;
3153 rto_min = rtoinfo.srto_min;
3156 rto_max = asoc ? msecs_to_jiffies(rto_max) : rto_max;
3158 rto_max = asoc ? asoc->rto_max : sp->rtoinfo.srto_max;
3161 rto_min = asoc ? msecs_to_jiffies(rto_min) : rto_min;
3163 rto_min = asoc ? asoc->rto_min : sp->rtoinfo.srto_min;
3165 if (rto_min > rto_max)
3169 if (rtoinfo.srto_initial != 0)
3171 msecs_to_jiffies(rtoinfo.srto_initial);
3172 asoc->rto_max = rto_max;
3173 asoc->rto_min = rto_min;
3175 /* If there is no association or the association-id = 0
3176 * set the values to the endpoint.
3178 if (rtoinfo.srto_initial != 0)
3179 sp->rtoinfo.srto_initial = rtoinfo.srto_initial;
3180 sp->rtoinfo.srto_max = rto_max;
3181 sp->rtoinfo.srto_min = rto_min;
3189 * 7.1.2 SCTP_ASSOCINFO
3191 * This option is used to tune the maximum retransmission attempts
3192 * of the association.
3193 * Returns an error if the new association retransmission value is
3194 * greater than the sum of the retransmission value of the peer.
3195 * See [SCTP] for more information.
3198 static int sctp_setsockopt_associnfo(struct sock *sk, char __user *optval, unsigned int optlen)
3201 struct sctp_assocparams assocparams;
3202 struct sctp_association *asoc;
3204 if (optlen != sizeof(struct sctp_assocparams))
3206 if (copy_from_user(&assocparams, optval, optlen))
3209 asoc = sctp_id2assoc(sk, assocparams.sasoc_assoc_id);
3211 if (!asoc && assocparams.sasoc_assoc_id != SCTP_FUTURE_ASSOC &&
3212 sctp_style(sk, UDP))
3215 /* Set the values to the specific association */
3217 if (assocparams.sasoc_asocmaxrxt != 0) {
3220 struct sctp_transport *peer_addr;
3222 list_for_each_entry(peer_addr, &asoc->peer.transport_addr_list,
3224 path_sum += peer_addr->pathmaxrxt;
3228 /* Only validate asocmaxrxt if we have more than
3229 * one path/transport. We do this because path
3230 * retransmissions are only counted when we have more
3234 assocparams.sasoc_asocmaxrxt > path_sum)
3237 asoc->max_retrans = assocparams.sasoc_asocmaxrxt;
3240 if (assocparams.sasoc_cookie_life != 0)
3241 asoc->cookie_life = ms_to_ktime(assocparams.sasoc_cookie_life);
3243 /* Set the values to the endpoint */
3244 struct sctp_sock *sp = sctp_sk(sk);
3246 if (assocparams.sasoc_asocmaxrxt != 0)
3247 sp->assocparams.sasoc_asocmaxrxt =
3248 assocparams.sasoc_asocmaxrxt;
3249 if (assocparams.sasoc_cookie_life != 0)
3250 sp->assocparams.sasoc_cookie_life =
3251 assocparams.sasoc_cookie_life;
3257 * 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR)
3259 * This socket option is a boolean flag which turns on or off mapped V4
3260 * addresses. If this option is turned on and the socket is type
3261 * PF_INET6, then IPv4 addresses will be mapped to V6 representation.
3262 * If this option is turned off, then no mapping will be done of V4
3263 * addresses and a user will receive both PF_INET6 and PF_INET type
3264 * addresses on the socket.
3266 static int sctp_setsockopt_mappedv4(struct sock *sk, char __user *optval, unsigned int optlen)
3269 struct sctp_sock *sp = sctp_sk(sk);
3271 if (optlen < sizeof(int))
3273 if (get_user(val, (int __user *)optval))
3284 * 8.1.16. Get or Set the Maximum Fragmentation Size (SCTP_MAXSEG)
3285 * This option will get or set the maximum size to put in any outgoing
3286 * SCTP DATA chunk. If a message is larger than this size it will be
3287 * fragmented by SCTP into the specified size. Note that the underlying
3288 * SCTP implementation may fragment into smaller sized chunks when the
3289 * PMTU of the underlying association is smaller than the value set by
3290 * the user. The default value for this option is '0' which indicates
3291 * the user is NOT limiting fragmentation and only the PMTU will effect
3292 * SCTP's choice of DATA chunk size. Note also that values set larger
3293 * than the maximum size of an IP datagram will effectively let SCTP
3294 * control fragmentation (i.e. the same as setting this option to 0).
3296 * The following structure is used to access and modify this parameter:
3298 * struct sctp_assoc_value {
3299 * sctp_assoc_t assoc_id;
3300 * uint32_t assoc_value;
3303 * assoc_id: This parameter is ignored for one-to-one style sockets.
3304 * For one-to-many style sockets this parameter indicates which
3305 * association the user is performing an action upon. Note that if
3306 * this field's value is zero then the endpoints default value is
3307 * changed (effecting future associations only).
3308 * assoc_value: This parameter specifies the maximum size in bytes.
3310 static int sctp_setsockopt_maxseg(struct sock *sk, char __user *optval, unsigned int optlen)
3312 struct sctp_sock *sp = sctp_sk(sk);
3313 struct sctp_assoc_value params;
3314 struct sctp_association *asoc;
3317 if (optlen == sizeof(int)) {
3318 pr_warn_ratelimited(DEPRECATED
3320 "Use of int in maxseg socket option.\n"
3321 "Use struct sctp_assoc_value instead\n",
3322 current->comm, task_pid_nr(current));
3323 if (copy_from_user(&val, optval, optlen))
3325 params.assoc_id = SCTP_FUTURE_ASSOC;
3326 } else if (optlen == sizeof(struct sctp_assoc_value)) {
3327 if (copy_from_user(¶ms, optval, optlen))
3329 val = params.assoc_value;
3334 asoc = sctp_id2assoc(sk, params.assoc_id);
3335 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
3336 sctp_style(sk, UDP))
3340 int min_len, max_len;
3341 __u16 datasize = asoc ? sctp_datachk_len(&asoc->stream) :
3342 sizeof(struct sctp_data_chunk);
3344 min_len = sctp_min_frag_point(sp, datasize);
3345 max_len = SCTP_MAX_CHUNK_LEN - datasize;
3347 if (val < min_len || val > max_len)
3352 asoc->user_frag = val;
3353 sctp_assoc_update_frag_point(asoc);
3355 sp->user_frag = val;
3363 * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR)
3365 * Requests that the peer mark the enclosed address as the association
3366 * primary. The enclosed address must be one of the association's
3367 * locally bound addresses. The following structure is used to make a
3368 * set primary request:
3370 static int sctp_setsockopt_peer_primary_addr(struct sock *sk, char __user *optval,
3371 unsigned int optlen)
3373 struct net *net = sock_net(sk);
3374 struct sctp_sock *sp;
3375 struct sctp_association *asoc = NULL;
3376 struct sctp_setpeerprim prim;
3377 struct sctp_chunk *chunk;
3383 if (!net->sctp.addip_enable)
3386 if (optlen != sizeof(struct sctp_setpeerprim))
3389 if (copy_from_user(&prim, optval, optlen))
3392 asoc = sctp_id2assoc(sk, prim.sspp_assoc_id);
3396 if (!asoc->peer.asconf_capable)
3399 if (asoc->peer.addip_disabled_mask & SCTP_PARAM_SET_PRIMARY)
3402 if (!sctp_state(asoc, ESTABLISHED))
3405 af = sctp_get_af_specific(prim.sspp_addr.ss_family);
3409 if (!af->addr_valid((union sctp_addr *)&prim.sspp_addr, sp, NULL))
3410 return -EADDRNOTAVAIL;
3412 if (!sctp_assoc_lookup_laddr(asoc, (union sctp_addr *)&prim.sspp_addr))
3413 return -EADDRNOTAVAIL;
3415 /* Allow security module to validate address. */
3416 err = security_sctp_bind_connect(sk, SCTP_SET_PEER_PRIMARY_ADDR,
3417 (struct sockaddr *)&prim.sspp_addr,
3422 /* Create an ASCONF chunk with SET_PRIMARY parameter */
3423 chunk = sctp_make_asconf_set_prim(asoc,
3424 (union sctp_addr *)&prim.sspp_addr);
3428 err = sctp_send_asconf(asoc, chunk);
3430 pr_debug("%s: we set peer primary addr primitively\n", __func__);
3435 static int sctp_setsockopt_adaptation_layer(struct sock *sk, char __user *optval,
3436 unsigned int optlen)
3438 struct sctp_setadaptation adaptation;
3440 if (optlen != sizeof(struct sctp_setadaptation))
3442 if (copy_from_user(&adaptation, optval, optlen))
3445 sctp_sk(sk)->adaptation_ind = adaptation.ssb_adaptation_ind;
3451 * 7.1.29. Set or Get the default context (SCTP_CONTEXT)
3453 * The context field in the sctp_sndrcvinfo structure is normally only
3454 * used when a failed message is retrieved holding the value that was
3455 * sent down on the actual send call. This option allows the setting of
3456 * a default context on an association basis that will be received on
3457 * reading messages from the peer. This is especially helpful in the
3458 * one-2-many model for an application to keep some reference to an
3459 * internal state machine that is processing messages on the
3460 * association. Note that the setting of this value only effects
3461 * received messages from the peer and does not effect the value that is
3462 * saved with outbound messages.
3464 static int sctp_setsockopt_context(struct sock *sk, char __user *optval,
3465 unsigned int optlen)
3467 struct sctp_assoc_value params;
3468 struct sctp_sock *sp;
3469 struct sctp_association *asoc;
3471 if (optlen != sizeof(struct sctp_assoc_value))
3473 if (copy_from_user(¶ms, optval, optlen))
3478 if (params.assoc_id != 0) {
3479 asoc = sctp_id2assoc(sk, params.assoc_id);
3482 asoc->default_rcv_context = params.assoc_value;
3484 sp->default_rcv_context = params.assoc_value;
3491 * 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE)
3493 * This options will at a minimum specify if the implementation is doing
3494 * fragmented interleave. Fragmented interleave, for a one to many
3495 * socket, is when subsequent calls to receive a message may return
3496 * parts of messages from different associations. Some implementations
3497 * may allow you to turn this value on or off. If so, when turned off,
3498 * no fragment interleave will occur (which will cause a head of line
3499 * blocking amongst multiple associations sharing the same one to many
3500 * socket). When this option is turned on, then each receive call may
3501 * come from a different association (thus the user must receive data
3502 * with the extended calls (e.g. sctp_recvmsg) to keep track of which
3503 * association each receive belongs to.
3505 * This option takes a boolean value. A non-zero value indicates that
3506 * fragmented interleave is on. A value of zero indicates that
3507 * fragmented interleave is off.
3509 * Note that it is important that an implementation that allows this
3510 * option to be turned on, have it off by default. Otherwise an unaware
3511 * application using the one to many model may become confused and act
3514 static int sctp_setsockopt_fragment_interleave(struct sock *sk,
3515 char __user *optval,
3516 unsigned int optlen)
3520 if (optlen != sizeof(int))
3522 if (get_user(val, (int __user *)optval))
3525 sctp_sk(sk)->frag_interleave = !!val;
3527 if (!sctp_sk(sk)->frag_interleave)
3528 sctp_sk(sk)->strm_interleave = 0;
3534 * 8.1.21. Set or Get the SCTP Partial Delivery Point
3535 * (SCTP_PARTIAL_DELIVERY_POINT)
3537 * This option will set or get the SCTP partial delivery point. This
3538 * point is the size of a message where the partial delivery API will be
3539 * invoked to help free up rwnd space for the peer. Setting this to a
3540 * lower value will cause partial deliveries to happen more often. The
3541 * calls argument is an integer that sets or gets the partial delivery
3542 * point. Note also that the call will fail if the user attempts to set
3543 * this value larger than the socket receive buffer size.
3545 * Note that any single message having a length smaller than or equal to
3546 * the SCTP partial delivery point will be delivered in one single read
3547 * call as long as the user provided buffer is large enough to hold the
3550 static int sctp_setsockopt_partial_delivery_point(struct sock *sk,
3551 char __user *optval,
3552 unsigned int optlen)
3556 if (optlen != sizeof(u32))
3558 if (get_user(val, (int __user *)optval))
3561 /* Note: We double the receive buffer from what the user sets
3562 * it to be, also initial rwnd is based on rcvbuf/2.
3564 if (val > (sk->sk_rcvbuf >> 1))
3567 sctp_sk(sk)->pd_point = val;
3569 return 0; /* is this the right error code? */
3573 * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST)
3575 * This option will allow a user to change the maximum burst of packets
3576 * that can be emitted by this association. Note that the default value
3577 * is 4, and some implementations may restrict this setting so that it
3578 * can only be lowered.
3580 * NOTE: This text doesn't seem right. Do this on a socket basis with
3581 * future associations inheriting the socket value.
3583 static int sctp_setsockopt_maxburst(struct sock *sk,
3584 char __user *optval,
3585 unsigned int optlen)
3587 struct sctp_assoc_value params;
3588 struct sctp_sock *sp;
3589 struct sctp_association *asoc;
3593 if (optlen == sizeof(int)) {
3594 pr_warn_ratelimited(DEPRECATED
3596 "Use of int in max_burst socket option deprecated.\n"
3597 "Use struct sctp_assoc_value instead\n",
3598 current->comm, task_pid_nr(current));
3599 if (copy_from_user(&val, optval, optlen))
3601 } else if (optlen == sizeof(struct sctp_assoc_value)) {
3602 if (copy_from_user(¶ms, optval, optlen))
3604 val = params.assoc_value;
3605 assoc_id = params.assoc_id;
3611 if (assoc_id != 0) {
3612 asoc = sctp_id2assoc(sk, assoc_id);
3615 asoc->max_burst = val;
3617 sp->max_burst = val;
3623 * 7.1.18. Add a chunk that must be authenticated (SCTP_AUTH_CHUNK)
3625 * This set option adds a chunk type that the user is requesting to be
3626 * received only in an authenticated way. Changes to the list of chunks
3627 * will only effect future associations on the socket.
3629 static int sctp_setsockopt_auth_chunk(struct sock *sk,
3630 char __user *optval,
3631 unsigned int optlen)
3633 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
3634 struct sctp_authchunk val;
3636 if (!ep->auth_enable)
3639 if (optlen != sizeof(struct sctp_authchunk))
3641 if (copy_from_user(&val, optval, optlen))
3644 switch (val.sauth_chunk) {
3646 case SCTP_CID_INIT_ACK:
3647 case SCTP_CID_SHUTDOWN_COMPLETE:
3652 /* add this chunk id to the endpoint */
3653 return sctp_auth_ep_add_chunkid(ep, val.sauth_chunk);
3657 * 7.1.19. Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT)
3659 * This option gets or sets the list of HMAC algorithms that the local
3660 * endpoint requires the peer to use.
3662 static int sctp_setsockopt_hmac_ident(struct sock *sk,
3663 char __user *optval,
3664 unsigned int optlen)
3666 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
3667 struct sctp_hmacalgo *hmacs;
3671 if (!ep->auth_enable)
3674 if (optlen < sizeof(struct sctp_hmacalgo))
3676 optlen = min_t(unsigned int, optlen, sizeof(struct sctp_hmacalgo) +
3677 SCTP_AUTH_NUM_HMACS * sizeof(u16));
3679 hmacs = memdup_user(optval, optlen);
3681 return PTR_ERR(hmacs);
3683 idents = hmacs->shmac_num_idents;
3684 if (idents == 0 || idents > SCTP_AUTH_NUM_HMACS ||
3685 (idents * sizeof(u16)) > (optlen - sizeof(struct sctp_hmacalgo))) {
3690 err = sctp_auth_ep_set_hmacs(ep, hmacs);
3697 * 7.1.20. Set a shared key (SCTP_AUTH_KEY)
3699 * This option will set a shared secret key which is used to build an
3700 * association shared key.
3702 static int sctp_setsockopt_auth_key(struct sock *sk,
3703 char __user *optval,
3704 unsigned int optlen)
3706 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
3707 struct sctp_authkey *authkey;
3708 struct sctp_association *asoc;
3711 if (!ep->auth_enable)
3714 if (optlen <= sizeof(struct sctp_authkey))
3716 /* authkey->sca_keylength is u16, so optlen can't be bigger than
3719 optlen = min_t(unsigned int, optlen, USHRT_MAX +
3720 sizeof(struct sctp_authkey));
3722 authkey = memdup_user(optval, optlen);
3723 if (IS_ERR(authkey))
3724 return PTR_ERR(authkey);
3726 if (authkey->sca_keylength > optlen - sizeof(struct sctp_authkey)) {
3731 asoc = sctp_id2assoc(sk, authkey->sca_assoc_id);
3732 if (!asoc && authkey->sca_assoc_id && sctp_style(sk, UDP)) {
3737 ret = sctp_auth_set_key(ep, asoc, authkey);
3744 * 7.1.21. Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY)
3746 * This option will get or set the active shared key to be used to build
3747 * the association shared key.
3749 static int sctp_setsockopt_active_key(struct sock *sk,
3750 char __user *optval,
3751 unsigned int optlen)
3753 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
3754 struct sctp_authkeyid val;
3755 struct sctp_association *asoc;
3757 if (!ep->auth_enable)
3760 if (optlen != sizeof(struct sctp_authkeyid))
3762 if (copy_from_user(&val, optval, optlen))
3765 asoc = sctp_id2assoc(sk, val.scact_assoc_id);
3766 if (!asoc && val.scact_assoc_id && sctp_style(sk, UDP))
3769 return sctp_auth_set_active_key(ep, asoc, val.scact_keynumber);
3773 * 7.1.22. Delete a shared key (SCTP_AUTH_DELETE_KEY)
3775 * This set option will delete a shared secret key from use.
3777 static int sctp_setsockopt_del_key(struct sock *sk,
3778 char __user *optval,
3779 unsigned int optlen)
3781 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
3782 struct sctp_authkeyid val;
3783 struct sctp_association *asoc;
3785 if (!ep->auth_enable)
3788 if (optlen != sizeof(struct sctp_authkeyid))
3790 if (copy_from_user(&val, optval, optlen))
3793 asoc = sctp_id2assoc(sk, val.scact_assoc_id);
3794 if (!asoc && val.scact_assoc_id && sctp_style(sk, UDP))
3797 return sctp_auth_del_key_id(ep, asoc, val.scact_keynumber);
3802 * 8.3.4 Deactivate a Shared Key (SCTP_AUTH_DEACTIVATE_KEY)
3804 * This set option will deactivate a shared secret key.
3806 static int sctp_setsockopt_deactivate_key(struct sock *sk, char __user *optval,
3807 unsigned int optlen)
3809 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
3810 struct sctp_authkeyid val;
3811 struct sctp_association *asoc;
3813 if (!ep->auth_enable)
3816 if (optlen != sizeof(struct sctp_authkeyid))
3818 if (copy_from_user(&val, optval, optlen))
3821 asoc = sctp_id2assoc(sk, val.scact_assoc_id);
3822 if (!asoc && val.scact_assoc_id && sctp_style(sk, UDP))
3825 return sctp_auth_deact_key_id(ep, asoc, 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, char __user *optval,
3843 unsigned int optlen)
3846 struct sctp_sock *sp = sctp_sk(sk);
3848 if (optlen < sizeof(int))
3850 if (get_user(val, (int __user *)optval))
3852 if (!sctp_is_ep_boundall(sk) && val)
3854 if ((val && sp->do_auto_asconf) || (!val && !sp->do_auto_asconf))
3857 spin_lock_bh(&sock_net(sk)->sctp.addr_wq_lock);
3858 if (val == 0 && sp->do_auto_asconf) {
3859 list_del(&sp->auto_asconf_list);
3860 sp->do_auto_asconf = 0;
3861 } else if (val && !sp->do_auto_asconf) {
3862 list_add_tail(&sp->auto_asconf_list,
3863 &sock_net(sk)->sctp.auto_asconf_splist);
3864 sp->do_auto_asconf = 1;
3866 spin_unlock_bh(&sock_net(sk)->sctp.addr_wq_lock);
3871 * SCTP_PEER_ADDR_THLDS
3873 * This option allows us to alter the partially failed threshold for one or all
3874 * transports in an association. See Section 6.1 of:
3875 * http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txt
3877 static int sctp_setsockopt_paddr_thresholds(struct sock *sk,
3878 char __user *optval,
3879 unsigned int optlen)
3881 struct sctp_paddrthlds val;
3882 struct sctp_transport *trans;
3883 struct sctp_association *asoc;
3885 if (optlen < sizeof(struct sctp_paddrthlds))
3887 if (copy_from_user(&val, (struct sctp_paddrthlds __user *)optval,
3888 sizeof(struct sctp_paddrthlds)))
3891 if (!sctp_is_any(sk, (const union sctp_addr *)&val.spt_address)) {
3892 trans = sctp_addr_id2transport(sk, &val.spt_address,
3897 if (val.spt_pathmaxrxt)
3898 trans->pathmaxrxt = val.spt_pathmaxrxt;
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;
3914 trans->pf_retrans = val.spt_pathpfthld;
3917 if (val.spt_pathmaxrxt)
3918 asoc->pathmaxrxt = val.spt_pathmaxrxt;
3919 asoc->pf_retrans = val.spt_pathpfthld;
3921 struct sctp_sock *sp = sctp_sk(sk);
3923 if (val.spt_pathmaxrxt)
3924 sp->pathmaxrxt = val.spt_pathmaxrxt;
3925 sp->pf_retrans = val.spt_pathpfthld;
3931 static int sctp_setsockopt_recvrcvinfo(struct sock *sk,
3932 char __user *optval,
3933 unsigned int optlen)
3937 if (optlen < sizeof(int))
3939 if (get_user(val, (int __user *) optval))
3942 sctp_sk(sk)->recvrcvinfo = (val == 0) ? 0 : 1;
3947 static int sctp_setsockopt_recvnxtinfo(struct sock *sk,
3948 char __user *optval,
3949 unsigned int optlen)
3953 if (optlen < sizeof(int))
3955 if (get_user(val, (int __user *) optval))
3958 sctp_sk(sk)->recvnxtinfo = (val == 0) ? 0 : 1;
3963 static int sctp_setsockopt_pr_supported(struct sock *sk,
3964 char __user *optval,
3965 unsigned int optlen)
3967 struct sctp_assoc_value params;
3968 struct sctp_association *asoc;
3970 if (optlen != sizeof(params))
3973 if (copy_from_user(¶ms, optval, optlen))
3976 asoc = sctp_id2assoc(sk, params.assoc_id);
3977 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
3978 sctp_style(sk, UDP))
3981 sctp_sk(sk)->ep->prsctp_enable = !!params.assoc_value;
3986 static int sctp_setsockopt_default_prinfo(struct sock *sk,
3987 char __user *optval,
3988 unsigned int optlen)
3990 struct sctp_default_prinfo info;
3991 struct sctp_association *asoc;
3992 int retval = -EINVAL;
3994 if (optlen != sizeof(info))
3997 if (copy_from_user(&info, optval, sizeof(info))) {
4002 if (info.pr_policy & ~SCTP_PR_SCTP_MASK)
4005 if (info.pr_policy == SCTP_PR_SCTP_NONE)
4008 asoc = sctp_id2assoc(sk, info.pr_assoc_id);
4010 SCTP_PR_SET_POLICY(asoc->default_flags, info.pr_policy);
4011 asoc->default_timetolive = info.pr_value;
4012 } else if (!info.pr_assoc_id) {
4013 struct sctp_sock *sp = sctp_sk(sk);
4015 SCTP_PR_SET_POLICY(sp->default_flags, info.pr_policy);
4016 sp->default_timetolive = info.pr_value;
4027 static int sctp_setsockopt_reconfig_supported(struct sock *sk,
4028 char __user *optval,
4029 unsigned int optlen)
4031 struct sctp_assoc_value params;
4032 struct sctp_association *asoc;
4033 int retval = -EINVAL;
4035 if (optlen != sizeof(params))
4038 if (copy_from_user(¶ms, optval, optlen)) {
4043 asoc = sctp_id2assoc(sk, params.assoc_id);
4045 asoc->reconf_enable = !!params.assoc_value;
4046 } else if (!params.assoc_id) {
4047 struct sctp_sock *sp = sctp_sk(sk);
4049 sp->ep->reconf_enable = !!params.assoc_value;
4060 static int sctp_setsockopt_enable_strreset(struct sock *sk,
4061 char __user *optval,
4062 unsigned int optlen)
4064 struct sctp_assoc_value params;
4065 struct sctp_association *asoc;
4066 int retval = -EINVAL;
4068 if (optlen != sizeof(params))
4071 if (copy_from_user(¶ms, optval, optlen)) {
4076 if (params.assoc_value & (~SCTP_ENABLE_STRRESET_MASK))
4079 asoc = sctp_id2assoc(sk, params.assoc_id);
4081 asoc->strreset_enable = params.assoc_value;
4082 } else if (!params.assoc_id) {
4083 struct sctp_sock *sp = sctp_sk(sk);
4085 sp->ep->strreset_enable = params.assoc_value;
4096 static int sctp_setsockopt_reset_streams(struct sock *sk,
4097 char __user *optval,
4098 unsigned int optlen)
4100 struct sctp_reset_streams *params;
4101 struct sctp_association *asoc;
4102 int retval = -EINVAL;
4104 if (optlen < sizeof(*params))
4106 /* srs_number_streams is u16, so optlen can't be bigger than this. */
4107 optlen = min_t(unsigned int, optlen, USHRT_MAX +
4108 sizeof(__u16) * sizeof(*params));
4110 params = memdup_user(optval, optlen);
4112 return PTR_ERR(params);
4114 if (params->srs_number_streams * sizeof(__u16) >
4115 optlen - sizeof(*params))
4118 asoc = sctp_id2assoc(sk, params->srs_assoc_id);
4122 retval = sctp_send_reset_streams(asoc, params);
4129 static int sctp_setsockopt_reset_assoc(struct sock *sk,
4130 char __user *optval,
4131 unsigned int optlen)
4133 struct sctp_association *asoc;
4134 sctp_assoc_t associd;
4135 int retval = -EINVAL;
4137 if (optlen != sizeof(associd))
4140 if (copy_from_user(&associd, optval, optlen)) {
4145 asoc = sctp_id2assoc(sk, associd);
4149 retval = sctp_send_reset_assoc(asoc);
4155 static int sctp_setsockopt_add_streams(struct sock *sk,
4156 char __user *optval,
4157 unsigned int optlen)
4159 struct sctp_association *asoc;
4160 struct sctp_add_streams params;
4161 int retval = -EINVAL;
4163 if (optlen != sizeof(params))
4166 if (copy_from_user(¶ms, optval, optlen)) {
4171 asoc = sctp_id2assoc(sk, params.sas_assoc_id);
4175 retval = sctp_send_add_streams(asoc, ¶ms);
4181 static int sctp_setsockopt_scheduler(struct sock *sk,
4182 char __user *optval,
4183 unsigned int optlen)
4185 struct sctp_association *asoc;
4186 struct sctp_assoc_value params;
4187 int retval = -EINVAL;
4189 if (optlen < sizeof(params))
4192 optlen = sizeof(params);
4193 if (copy_from_user(¶ms, optval, optlen)) {
4198 if (params.assoc_value > SCTP_SS_MAX)
4201 asoc = sctp_id2assoc(sk, params.assoc_id);
4205 retval = sctp_sched_set_sched(asoc, params.assoc_value);
4211 static int sctp_setsockopt_scheduler_value(struct sock *sk,
4212 char __user *optval,
4213 unsigned int optlen)
4215 struct sctp_association *asoc;
4216 struct sctp_stream_value params;
4217 int retval = -EINVAL;
4219 if (optlen < sizeof(params))
4222 optlen = sizeof(params);
4223 if (copy_from_user(¶ms, optval, optlen)) {
4228 asoc = sctp_id2assoc(sk, params.assoc_id);
4232 retval = sctp_sched_set_value(asoc, params.stream_id,
4233 params.stream_value, GFP_KERNEL);
4239 static int sctp_setsockopt_interleaving_supported(struct sock *sk,
4240 char __user *optval,
4241 unsigned int optlen)
4243 struct sctp_sock *sp = sctp_sk(sk);
4244 struct net *net = sock_net(sk);
4245 struct sctp_assoc_value params;
4246 int retval = -EINVAL;
4248 if (optlen < sizeof(params))
4251 optlen = sizeof(params);
4252 if (copy_from_user(¶ms, optval, optlen)) {
4257 if (params.assoc_id)
4260 if (!net->sctp.intl_enable || !sp->frag_interleave) {
4265 sp->strm_interleave = !!params.assoc_value;
4273 static int sctp_setsockopt_reuse_port(struct sock *sk, char __user *optval,
4274 unsigned int optlen)
4278 if (!sctp_style(sk, TCP))
4281 if (sctp_sk(sk)->ep->base.bind_addr.port)
4284 if (optlen < sizeof(int))
4287 if (get_user(val, (int __user *)optval))
4290 sctp_sk(sk)->reuse = !!val;
4295 static int sctp_setsockopt_event(struct sock *sk, char __user *optval,
4296 unsigned int optlen)
4298 struct sctp_association *asoc;
4299 struct sctp_ulpevent *event;
4300 struct sctp_event param;
4303 if (optlen < sizeof(param)) {
4308 optlen = sizeof(param);
4309 if (copy_from_user(¶m, optval, optlen)) {
4314 if (param.se_type < SCTP_SN_TYPE_BASE ||
4315 param.se_type > SCTP_SN_TYPE_MAX) {
4320 asoc = sctp_id2assoc(sk, param.se_assoc_id);
4322 sctp_ulpevent_type_set(&sctp_sk(sk)->subscribe,
4323 param.se_type, param.se_on);
4327 sctp_ulpevent_type_set(&asoc->subscribe, param.se_type, param.se_on);
4329 if (param.se_type == SCTP_SENDER_DRY_EVENT && param.se_on) {
4330 if (sctp_outq_is_empty(&asoc->outqueue)) {
4331 event = sctp_ulpevent_make_sender_dry_event(asoc,
4332 GFP_USER | __GFP_NOWARN);
4338 asoc->stream.si->enqueue_event(&asoc->ulpq, event);
4346 /* API 6.2 setsockopt(), getsockopt()
4348 * Applications use setsockopt() and getsockopt() to set or retrieve
4349 * socket options. Socket options are used to change the default
4350 * behavior of sockets calls. They are described in Section 7.
4354 * ret = getsockopt(int sd, int level, int optname, void __user *optval,
4355 * int __user *optlen);
4356 * ret = setsockopt(int sd, int level, int optname, const void __user *optval,
4359 * sd - the socket descript.
4360 * level - set to IPPROTO_SCTP for all SCTP options.
4361 * optname - the option name.
4362 * optval - the buffer to store the value of the option.
4363 * optlen - the size of the buffer.
4365 static int sctp_setsockopt(struct sock *sk, int level, int optname,
4366 char __user *optval, unsigned int optlen)
4370 pr_debug("%s: sk:%p, optname:%d\n", __func__, sk, optname);
4372 /* I can hardly begin to describe how wrong this is. This is
4373 * so broken as to be worse than useless. The API draft
4374 * REALLY is NOT helpful here... I am not convinced that the
4375 * semantics of setsockopt() with a level OTHER THAN SOL_SCTP
4376 * are at all well-founded.
4378 if (level != SOL_SCTP) {
4379 struct sctp_af *af = sctp_sk(sk)->pf->af;
4380 retval = af->setsockopt(sk, level, optname, optval, optlen);
4387 case SCTP_SOCKOPT_BINDX_ADD:
4388 /* 'optlen' is the size of the addresses buffer. */
4389 retval = sctp_setsockopt_bindx(sk, (struct sockaddr __user *)optval,
4390 optlen, SCTP_BINDX_ADD_ADDR);
4393 case SCTP_SOCKOPT_BINDX_REM:
4394 /* 'optlen' is the size of the addresses buffer. */
4395 retval = sctp_setsockopt_bindx(sk, (struct sockaddr __user *)optval,
4396 optlen, SCTP_BINDX_REM_ADDR);
4399 case SCTP_SOCKOPT_CONNECTX_OLD:
4400 /* 'optlen' is the size of the addresses buffer. */
4401 retval = sctp_setsockopt_connectx_old(sk,
4402 (struct sockaddr __user *)optval,
4406 case SCTP_SOCKOPT_CONNECTX:
4407 /* 'optlen' is the size of the addresses buffer. */
4408 retval = sctp_setsockopt_connectx(sk,
4409 (struct sockaddr __user *)optval,
4413 case SCTP_DISABLE_FRAGMENTS:
4414 retval = sctp_setsockopt_disable_fragments(sk, optval, optlen);
4418 retval = sctp_setsockopt_events(sk, optval, optlen);
4421 case SCTP_AUTOCLOSE:
4422 retval = sctp_setsockopt_autoclose(sk, optval, optlen);
4425 case SCTP_PEER_ADDR_PARAMS:
4426 retval = sctp_setsockopt_peer_addr_params(sk, optval, optlen);
4429 case SCTP_DELAYED_SACK:
4430 retval = sctp_setsockopt_delayed_ack(sk, optval, optlen);
4432 case SCTP_PARTIAL_DELIVERY_POINT:
4433 retval = sctp_setsockopt_partial_delivery_point(sk, optval, optlen);
4437 retval = sctp_setsockopt_initmsg(sk, optval, optlen);
4439 case SCTP_DEFAULT_SEND_PARAM:
4440 retval = sctp_setsockopt_default_send_param(sk, optval,
4443 case SCTP_DEFAULT_SNDINFO:
4444 retval = sctp_setsockopt_default_sndinfo(sk, optval, optlen);
4446 case SCTP_PRIMARY_ADDR:
4447 retval = sctp_setsockopt_primary_addr(sk, optval, optlen);
4449 case SCTP_SET_PEER_PRIMARY_ADDR:
4450 retval = sctp_setsockopt_peer_primary_addr(sk, optval, optlen);
4453 retval = sctp_setsockopt_nodelay(sk, optval, optlen);
4456 retval = sctp_setsockopt_rtoinfo(sk, optval, optlen);
4458 case SCTP_ASSOCINFO:
4459 retval = sctp_setsockopt_associnfo(sk, optval, optlen);
4461 case SCTP_I_WANT_MAPPED_V4_ADDR:
4462 retval = sctp_setsockopt_mappedv4(sk, optval, optlen);
4465 retval = sctp_setsockopt_maxseg(sk, optval, optlen);
4467 case SCTP_ADAPTATION_LAYER:
4468 retval = sctp_setsockopt_adaptation_layer(sk, optval, optlen);
4471 retval = sctp_setsockopt_context(sk, optval, optlen);
4473 case SCTP_FRAGMENT_INTERLEAVE:
4474 retval = sctp_setsockopt_fragment_interleave(sk, optval, optlen);
4476 case SCTP_MAX_BURST:
4477 retval = sctp_setsockopt_maxburst(sk, optval, optlen);
4479 case SCTP_AUTH_CHUNK:
4480 retval = sctp_setsockopt_auth_chunk(sk, optval, optlen);
4482 case SCTP_HMAC_IDENT:
4483 retval = sctp_setsockopt_hmac_ident(sk, optval, optlen);
4486 retval = sctp_setsockopt_auth_key(sk, optval, optlen);
4488 case SCTP_AUTH_ACTIVE_KEY:
4489 retval = sctp_setsockopt_active_key(sk, optval, optlen);
4491 case SCTP_AUTH_DELETE_KEY:
4492 retval = sctp_setsockopt_del_key(sk, optval, optlen);
4494 case SCTP_AUTH_DEACTIVATE_KEY:
4495 retval = sctp_setsockopt_deactivate_key(sk, optval, optlen);
4497 case SCTP_AUTO_ASCONF:
4498 retval = sctp_setsockopt_auto_asconf(sk, optval, optlen);
4500 case SCTP_PEER_ADDR_THLDS:
4501 retval = sctp_setsockopt_paddr_thresholds(sk, optval, optlen);
4503 case SCTP_RECVRCVINFO:
4504 retval = sctp_setsockopt_recvrcvinfo(sk, optval, optlen);
4506 case SCTP_RECVNXTINFO:
4507 retval = sctp_setsockopt_recvnxtinfo(sk, optval, optlen);
4509 case SCTP_PR_SUPPORTED:
4510 retval = sctp_setsockopt_pr_supported(sk, optval, optlen);
4512 case SCTP_DEFAULT_PRINFO:
4513 retval = sctp_setsockopt_default_prinfo(sk, optval, optlen);
4515 case SCTP_RECONFIG_SUPPORTED:
4516 retval = sctp_setsockopt_reconfig_supported(sk, optval, optlen);
4518 case SCTP_ENABLE_STREAM_RESET:
4519 retval = sctp_setsockopt_enable_strreset(sk, optval, optlen);
4521 case SCTP_RESET_STREAMS:
4522 retval = sctp_setsockopt_reset_streams(sk, optval, optlen);
4524 case SCTP_RESET_ASSOC:
4525 retval = sctp_setsockopt_reset_assoc(sk, optval, optlen);
4527 case SCTP_ADD_STREAMS:
4528 retval = sctp_setsockopt_add_streams(sk, optval, optlen);
4530 case SCTP_STREAM_SCHEDULER:
4531 retval = sctp_setsockopt_scheduler(sk, optval, optlen);
4533 case SCTP_STREAM_SCHEDULER_VALUE:
4534 retval = sctp_setsockopt_scheduler_value(sk, optval, optlen);
4536 case SCTP_INTERLEAVING_SUPPORTED:
4537 retval = sctp_setsockopt_interleaving_supported(sk, optval,
4540 case SCTP_REUSE_PORT:
4541 retval = sctp_setsockopt_reuse_port(sk, optval, optlen);
4544 retval = sctp_setsockopt_event(sk, optval, optlen);
4547 retval = -ENOPROTOOPT;
4557 /* API 3.1.6 connect() - UDP Style Syntax
4559 * An application may use the connect() call in the UDP model to initiate an
4560 * association without sending data.
4564 * ret = connect(int sd, const struct sockaddr *nam, socklen_t len);
4566 * sd: the socket descriptor to have a new association added to.
4568 * nam: the address structure (either struct sockaddr_in or struct
4569 * sockaddr_in6 defined in RFC2553 [7]).
4571 * len: the size of the address.
4573 static int sctp_connect(struct sock *sk, struct sockaddr *addr,
4574 int addr_len, int flags)
4576 struct inet_sock *inet = inet_sk(sk);
4582 pr_debug("%s: sk:%p, sockaddr:%p, addr_len:%d\n", __func__, sk,
4585 /* We may need to bind the socket. */
4586 if (!inet->inet_num) {
4587 if (sk->sk_prot->get_port(sk, 0)) {
4591 inet->inet_sport = htons(inet->inet_num);
4594 /* Validate addr_len before calling common connect/connectx routine. */
4595 af = sctp_get_af_specific(addr->sa_family);
4596 if (!af || addr_len < af->sockaddr_len) {
4599 /* Pass correct addr len to common routine (so it knows there
4600 * is only one address being passed.
4602 err = __sctp_connect(sk, addr, af->sockaddr_len, flags, NULL);
4609 int sctp_inet_connect(struct socket *sock, struct sockaddr *uaddr,
4610 int addr_len, int flags)
4612 if (addr_len < sizeof(uaddr->sa_family))
4615 if (uaddr->sa_family == AF_UNSPEC)
4618 return sctp_connect(sock->sk, uaddr, addr_len, flags);
4621 /* FIXME: Write comments. */
4622 static int sctp_disconnect(struct sock *sk, int flags)
4624 return -EOPNOTSUPP; /* STUB */
4627 /* 4.1.4 accept() - TCP Style Syntax
4629 * Applications use accept() call to remove an established SCTP
4630 * association from the accept queue of the endpoint. A new socket
4631 * descriptor will be returned from accept() to represent the newly
4632 * formed association.
4634 static struct sock *sctp_accept(struct sock *sk, int flags, int *err, bool kern)
4636 struct sctp_sock *sp;
4637 struct sctp_endpoint *ep;
4638 struct sock *newsk = NULL;
4639 struct sctp_association *asoc;
4648 if (!sctp_style(sk, TCP)) {
4649 error = -EOPNOTSUPP;
4653 if (!sctp_sstate(sk, LISTENING)) {
4658 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
4660 error = sctp_wait_for_accept(sk, timeo);
4664 /* We treat the list of associations on the endpoint as the accept
4665 * queue and pick the first association on the list.
4667 asoc = list_entry(ep->asocs.next, struct sctp_association, asocs);
4669 newsk = sp->pf->create_accept_sk(sk, asoc, kern);
4675 /* Populate the fields of the newsk from the oldsk and migrate the
4676 * asoc to the newsk.
4678 sctp_sock_migrate(sk, newsk, asoc, SCTP_SOCKET_TCP);
4686 /* The SCTP ioctl handler. */
4687 static int sctp_ioctl(struct sock *sk, int cmd, unsigned long arg)
4694 * SEQPACKET-style sockets in LISTENING state are valid, for
4695 * SCTP, so only discard TCP-style sockets in LISTENING state.
4697 if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))
4702 struct sk_buff *skb;
4703 unsigned int amount = 0;
4705 skb = skb_peek(&sk->sk_receive_queue);
4708 * We will only return the amount of this packet since
4709 * that is all that will be read.
4713 rc = put_user(amount, (int __user *)arg);
4725 /* This is the function which gets called during socket creation to
4726 * initialized the SCTP-specific portion of the sock.
4727 * The sock structure should already be zero-filled memory.
4729 static int sctp_init_sock(struct sock *sk)
4731 struct net *net = sock_net(sk);
4732 struct sctp_sock *sp;
4734 pr_debug("%s: sk:%p\n", __func__, sk);
4738 /* Initialize the SCTP per socket area. */
4739 switch (sk->sk_type) {
4740 case SOCK_SEQPACKET:
4741 sp->type = SCTP_SOCKET_UDP;
4744 sp->type = SCTP_SOCKET_TCP;
4747 return -ESOCKTNOSUPPORT;
4750 sk->sk_gso_type = SKB_GSO_SCTP;
4752 /* Initialize default send parameters. These parameters can be
4753 * modified with the SCTP_DEFAULT_SEND_PARAM socket option.
4755 sp->default_stream = 0;
4756 sp->default_ppid = 0;
4757 sp->default_flags = 0;
4758 sp->default_context = 0;
4759 sp->default_timetolive = 0;
4761 sp->default_rcv_context = 0;
4762 sp->max_burst = net->sctp.max_burst;
4764 sp->sctp_hmac_alg = net->sctp.sctp_hmac_alg;
4766 /* Initialize default setup parameters. These parameters
4767 * can be modified with the SCTP_INITMSG socket option or
4768 * overridden by the SCTP_INIT CMSG.
4770 sp->initmsg.sinit_num_ostreams = sctp_max_outstreams;
4771 sp->initmsg.sinit_max_instreams = sctp_max_instreams;
4772 sp->initmsg.sinit_max_attempts = net->sctp.max_retrans_init;
4773 sp->initmsg.sinit_max_init_timeo = net->sctp.rto_max;
4775 /* Initialize default RTO related parameters. These parameters can
4776 * be modified for with the SCTP_RTOINFO socket option.
4778 sp->rtoinfo.srto_initial = net->sctp.rto_initial;
4779 sp->rtoinfo.srto_max = net->sctp.rto_max;
4780 sp->rtoinfo.srto_min = net->sctp.rto_min;
4782 /* Initialize default association related parameters. These parameters
4783 * can be modified with the SCTP_ASSOCINFO socket option.
4785 sp->assocparams.sasoc_asocmaxrxt = net->sctp.max_retrans_association;
4786 sp->assocparams.sasoc_number_peer_destinations = 0;
4787 sp->assocparams.sasoc_peer_rwnd = 0;
4788 sp->assocparams.sasoc_local_rwnd = 0;
4789 sp->assocparams.sasoc_cookie_life = net->sctp.valid_cookie_life;
4791 /* Initialize default event subscriptions. By default, all the
4796 /* Default Peer Address Parameters. These defaults can
4797 * be modified via SCTP_PEER_ADDR_PARAMS
4799 sp->hbinterval = net->sctp.hb_interval;
4800 sp->pathmaxrxt = net->sctp.max_retrans_path;
4801 sp->pf_retrans = net->sctp.pf_retrans;
4802 sp->pathmtu = 0; /* allow default discovery */
4803 sp->sackdelay = net->sctp.sack_timeout;
4805 sp->param_flags = SPP_HB_ENABLE |
4807 SPP_SACKDELAY_ENABLE;
4809 /* If enabled no SCTP message fragmentation will be performed.
4810 * Configure through SCTP_DISABLE_FRAGMENTS socket option.
4812 sp->disable_fragments = 0;
4814 /* Enable Nagle algorithm by default. */
4817 sp->recvrcvinfo = 0;
4818 sp->recvnxtinfo = 0;
4820 /* Enable by default. */
4823 /* Auto-close idle associations after the configured
4824 * number of seconds. A value of 0 disables this
4825 * feature. Configure through the SCTP_AUTOCLOSE socket option,
4826 * for UDP-style sockets only.
4830 /* User specified fragmentation limit. */
4833 sp->adaptation_ind = 0;
4835 sp->pf = sctp_get_pf_specific(sk->sk_family);
4837 /* Control variables for partial data delivery. */
4838 atomic_set(&sp->pd_mode, 0);
4839 skb_queue_head_init(&sp->pd_lobby);
4840 sp->frag_interleave = 0;
4842 /* Create a per socket endpoint structure. Even if we
4843 * change the data structure relationships, this may still
4844 * be useful for storing pre-connect address information.
4846 sp->ep = sctp_endpoint_new(sk, GFP_KERNEL);
4852 sk->sk_destruct = sctp_destruct_sock;
4854 SCTP_DBG_OBJCNT_INC(sock);
4857 sk_sockets_allocated_inc(sk);
4858 sock_prot_inuse_add(net, sk->sk_prot, 1);
4860 /* Nothing can fail after this block, otherwise
4861 * sctp_destroy_sock() will be called without addr_wq_lock held
4863 if (net->sctp.default_auto_asconf) {
4864 spin_lock(&sock_net(sk)->sctp.addr_wq_lock);
4865 list_add_tail(&sp->auto_asconf_list,
4866 &net->sctp.auto_asconf_splist);
4867 sp->do_auto_asconf = 1;
4868 spin_unlock(&sock_net(sk)->sctp.addr_wq_lock);
4870 sp->do_auto_asconf = 0;
4878 /* Cleanup any SCTP per socket resources. Must be called with
4879 * sock_net(sk)->sctp.addr_wq_lock held if sp->do_auto_asconf is true
4881 static void sctp_destroy_sock(struct sock *sk)
4883 struct sctp_sock *sp;
4885 pr_debug("%s: sk:%p\n", __func__, sk);
4887 /* Release our hold on the endpoint. */
4889 /* This could happen during socket init, thus we bail out
4890 * early, since the rest of the below is not setup either.
4895 if (sp->do_auto_asconf) {
4896 sp->do_auto_asconf = 0;
4897 list_del(&sp->auto_asconf_list);
4899 sctp_endpoint_free(sp->ep);
4901 sk_sockets_allocated_dec(sk);
4902 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
4906 /* Triggered when there are no references on the socket anymore */
4907 static void sctp_destruct_sock(struct sock *sk)
4909 struct sctp_sock *sp = sctp_sk(sk);
4911 /* Free up the HMAC transform. */
4912 crypto_free_shash(sp->hmac);
4914 inet_sock_destruct(sk);
4917 /* API 4.1.7 shutdown() - TCP Style Syntax
4918 * int shutdown(int socket, int how);
4920 * sd - the socket descriptor of the association to be closed.
4921 * how - Specifies the type of shutdown. The values are
4924 * Disables further receive operations. No SCTP
4925 * protocol action is taken.
4927 * Disables further send operations, and initiates
4928 * the SCTP shutdown sequence.
4930 * Disables further send and receive operations
4931 * and initiates the SCTP shutdown sequence.
4933 static void sctp_shutdown(struct sock *sk, int how)
4935 struct net *net = sock_net(sk);
4936 struct sctp_endpoint *ep;
4938 if (!sctp_style(sk, TCP))
4941 ep = sctp_sk(sk)->ep;
4942 if (how & SEND_SHUTDOWN && !list_empty(&ep->asocs)) {
4943 struct sctp_association *asoc;
4945 inet_sk_set_state(sk, SCTP_SS_CLOSING);
4946 asoc = list_entry(ep->asocs.next,
4947 struct sctp_association, asocs);
4948 sctp_primitive_SHUTDOWN(net, asoc, NULL);
4952 int sctp_get_sctp_info(struct sock *sk, struct sctp_association *asoc,
4953 struct sctp_info *info)
4955 struct sctp_transport *prim;
4956 struct list_head *pos;
4959 memset(info, 0, sizeof(*info));
4961 struct sctp_sock *sp = sctp_sk(sk);
4963 info->sctpi_s_autoclose = sp->autoclose;
4964 info->sctpi_s_adaptation_ind = sp->adaptation_ind;
4965 info->sctpi_s_pd_point = sp->pd_point;
4966 info->sctpi_s_nodelay = sp->nodelay;
4967 info->sctpi_s_disable_fragments = sp->disable_fragments;
4968 info->sctpi_s_v4mapped = sp->v4mapped;
4969 info->sctpi_s_frag_interleave = sp->frag_interleave;
4970 info->sctpi_s_type = sp->type;
4975 info->sctpi_tag = asoc->c.my_vtag;
4976 info->sctpi_state = asoc->state;
4977 info->sctpi_rwnd = asoc->a_rwnd;
4978 info->sctpi_unackdata = asoc->unack_data;
4979 info->sctpi_penddata = sctp_tsnmap_pending(&asoc->peer.tsn_map);
4980 info->sctpi_instrms = asoc->stream.incnt;
4981 info->sctpi_outstrms = asoc->stream.outcnt;
4982 list_for_each(pos, &asoc->base.inqueue.in_chunk_list)
4983 info->sctpi_inqueue++;
4984 list_for_each(pos, &asoc->outqueue.out_chunk_list)
4985 info->sctpi_outqueue++;
4986 info->sctpi_overall_error = asoc->overall_error_count;
4987 info->sctpi_max_burst = asoc->max_burst;
4988 info->sctpi_maxseg = asoc->frag_point;
4989 info->sctpi_peer_rwnd = asoc->peer.rwnd;
4990 info->sctpi_peer_tag = asoc->c.peer_vtag;
4992 mask = asoc->peer.ecn_capable << 1;
4993 mask = (mask | asoc->peer.ipv4_address) << 1;
4994 mask = (mask | asoc->peer.ipv6_address) << 1;
4995 mask = (mask | asoc->peer.hostname_address) << 1;
4996 mask = (mask | asoc->peer.asconf_capable) << 1;
4997 mask = (mask | asoc->peer.prsctp_capable) << 1;
4998 mask = (mask | asoc->peer.auth_capable);
4999 info->sctpi_peer_capable = mask;
5000 mask = asoc->peer.sack_needed << 1;
5001 mask = (mask | asoc->peer.sack_generation) << 1;
5002 mask = (mask | asoc->peer.zero_window_announced);
5003 info->sctpi_peer_sack = mask;
5005 info->sctpi_isacks = asoc->stats.isacks;
5006 info->sctpi_osacks = asoc->stats.osacks;
5007 info->sctpi_opackets = asoc->stats.opackets;
5008 info->sctpi_ipackets = asoc->stats.ipackets;
5009 info->sctpi_rtxchunks = asoc->stats.rtxchunks;
5010 info->sctpi_outofseqtsns = asoc->stats.outofseqtsns;
5011 info->sctpi_idupchunks = asoc->stats.idupchunks;
5012 info->sctpi_gapcnt = asoc->stats.gapcnt;
5013 info->sctpi_ouodchunks = asoc->stats.ouodchunks;
5014 info->sctpi_iuodchunks = asoc->stats.iuodchunks;
5015 info->sctpi_oodchunks = asoc->stats.oodchunks;
5016 info->sctpi_iodchunks = asoc->stats.iodchunks;
5017 info->sctpi_octrlchunks = asoc->stats.octrlchunks;
5018 info->sctpi_ictrlchunks = asoc->stats.ictrlchunks;
5020 prim = asoc->peer.primary_path;
5021 memcpy(&info->sctpi_p_address, &prim->ipaddr, sizeof(prim->ipaddr));
5022 info->sctpi_p_state = prim->state;
5023 info->sctpi_p_cwnd = prim->cwnd;
5024 info->sctpi_p_srtt = prim->srtt;
5025 info->sctpi_p_rto = jiffies_to_msecs(prim->rto);
5026 info->sctpi_p_hbinterval = prim->hbinterval;
5027 info->sctpi_p_pathmaxrxt = prim->pathmaxrxt;
5028 info->sctpi_p_sackdelay = jiffies_to_msecs(prim->sackdelay);
5029 info->sctpi_p_ssthresh = prim->ssthresh;
5030 info->sctpi_p_partial_bytes_acked = prim->partial_bytes_acked;
5031 info->sctpi_p_flight_size = prim->flight_size;
5032 info->sctpi_p_error = prim->error_count;
5036 EXPORT_SYMBOL_GPL(sctp_get_sctp_info);
5038 /* use callback to avoid exporting the core structure */
5039 void sctp_transport_walk_start(struct rhashtable_iter *iter)
5041 rhltable_walk_enter(&sctp_transport_hashtable, iter);
5043 rhashtable_walk_start(iter);
5046 void sctp_transport_walk_stop(struct rhashtable_iter *iter)
5048 rhashtable_walk_stop(iter);
5049 rhashtable_walk_exit(iter);
5052 struct sctp_transport *sctp_transport_get_next(struct net *net,
5053 struct rhashtable_iter *iter)
5055 struct sctp_transport *t;
5057 t = rhashtable_walk_next(iter);
5058 for (; t; t = rhashtable_walk_next(iter)) {
5060 if (PTR_ERR(t) == -EAGAIN)
5065 if (!sctp_transport_hold(t))
5068 if (net_eq(sock_net(t->asoc->base.sk), net) &&
5069 t->asoc->peer.primary_path == t)
5072 sctp_transport_put(t);
5078 struct sctp_transport *sctp_transport_get_idx(struct net *net,
5079 struct rhashtable_iter *iter,
5082 struct sctp_transport *t;
5085 return SEQ_START_TOKEN;
5087 while ((t = sctp_transport_get_next(net, iter)) && !IS_ERR(t)) {
5090 sctp_transport_put(t);
5096 int sctp_for_each_endpoint(int (*cb)(struct sctp_endpoint *, void *),
5100 struct sctp_ep_common *epb;
5101 struct sctp_hashbucket *head;
5103 for (head = sctp_ep_hashtable; hash < sctp_ep_hashsize;
5105 read_lock_bh(&head->lock);
5106 sctp_for_each_hentry(epb, &head->chain) {
5107 err = cb(sctp_ep(epb), p);
5111 read_unlock_bh(&head->lock);
5116 EXPORT_SYMBOL_GPL(sctp_for_each_endpoint);
5118 int sctp_transport_lookup_process(int (*cb)(struct sctp_transport *, void *),
5120 const union sctp_addr *laddr,
5121 const union sctp_addr *paddr, void *p)
5123 struct sctp_transport *transport;
5127 transport = sctp_addrs_lookup_transport(net, laddr, paddr);
5132 err = cb(transport, p);
5133 sctp_transport_put(transport);
5137 EXPORT_SYMBOL_GPL(sctp_transport_lookup_process);
5139 int sctp_for_each_transport(int (*cb)(struct sctp_transport *, void *),
5140 int (*cb_done)(struct sctp_transport *, void *),
5141 struct net *net, int *pos, void *p) {
5142 struct rhashtable_iter hti;
5143 struct sctp_transport *tsp;
5148 sctp_transport_walk_start(&hti);
5150 tsp = sctp_transport_get_idx(net, &hti, *pos + 1);
5151 for (; !IS_ERR_OR_NULL(tsp); tsp = sctp_transport_get_next(net, &hti)) {
5156 sctp_transport_put(tsp);
5158 sctp_transport_walk_stop(&hti);
5161 if (cb_done && !cb_done(tsp, p)) {
5163 sctp_transport_put(tsp);
5166 sctp_transport_put(tsp);
5171 EXPORT_SYMBOL_GPL(sctp_for_each_transport);
5173 /* 7.2.1 Association Status (SCTP_STATUS)
5175 * Applications can retrieve current status information about an
5176 * association, including association state, peer receiver window size,
5177 * number of unacked data chunks, and number of data chunks pending
5178 * receipt. This information is read-only.
5180 static int sctp_getsockopt_sctp_status(struct sock *sk, int len,
5181 char __user *optval,
5184 struct sctp_status status;
5185 struct sctp_association *asoc = NULL;
5186 struct sctp_transport *transport;
5187 sctp_assoc_t associd;
5190 if (len < sizeof(status)) {
5195 len = sizeof(status);
5196 if (copy_from_user(&status, optval, len)) {
5201 associd = status.sstat_assoc_id;
5202 asoc = sctp_id2assoc(sk, associd);
5208 transport = asoc->peer.primary_path;
5210 status.sstat_assoc_id = sctp_assoc2id(asoc);
5211 status.sstat_state = sctp_assoc_to_state(asoc);
5212 status.sstat_rwnd = asoc->peer.rwnd;
5213 status.sstat_unackdata = asoc->unack_data;
5215 status.sstat_penddata = sctp_tsnmap_pending(&asoc->peer.tsn_map);
5216 status.sstat_instrms = asoc->stream.incnt;
5217 status.sstat_outstrms = asoc->stream.outcnt;
5218 status.sstat_fragmentation_point = asoc->frag_point;
5219 status.sstat_primary.spinfo_assoc_id = sctp_assoc2id(transport->asoc);
5220 memcpy(&status.sstat_primary.spinfo_address, &transport->ipaddr,
5221 transport->af_specific->sockaddr_len);
5222 /* Map ipv4 address into v4-mapped-on-v6 address. */
5223 sctp_get_pf_specific(sk->sk_family)->addr_to_user(sctp_sk(sk),
5224 (union sctp_addr *)&status.sstat_primary.spinfo_address);
5225 status.sstat_primary.spinfo_state = transport->state;
5226 status.sstat_primary.spinfo_cwnd = transport->cwnd;
5227 status.sstat_primary.spinfo_srtt = transport->srtt;
5228 status.sstat_primary.spinfo_rto = jiffies_to_msecs(transport->rto);
5229 status.sstat_primary.spinfo_mtu = transport->pathmtu;
5231 if (status.sstat_primary.spinfo_state == SCTP_UNKNOWN)
5232 status.sstat_primary.spinfo_state = SCTP_ACTIVE;
5234 if (put_user(len, optlen)) {
5239 pr_debug("%s: len:%d, state:%d, rwnd:%d, assoc_id:%d\n",
5240 __func__, len, status.sstat_state, status.sstat_rwnd,
5241 status.sstat_assoc_id);
5243 if (copy_to_user(optval, &status, len)) {
5253 /* 7.2.2 Peer Address Information (SCTP_GET_PEER_ADDR_INFO)
5255 * Applications can retrieve information about a specific peer address
5256 * of an association, including its reachability state, congestion
5257 * window, and retransmission timer values. This information is
5260 static int sctp_getsockopt_peer_addr_info(struct sock *sk, int len,
5261 char __user *optval,
5264 struct sctp_paddrinfo pinfo;
5265 struct sctp_transport *transport;
5268 if (len < sizeof(pinfo)) {
5273 len = sizeof(pinfo);
5274 if (copy_from_user(&pinfo, optval, len)) {
5279 transport = sctp_addr_id2transport(sk, &pinfo.spinfo_address,
5280 pinfo.spinfo_assoc_id);
5284 pinfo.spinfo_assoc_id = sctp_assoc2id(transport->asoc);
5285 pinfo.spinfo_state = transport->state;
5286 pinfo.spinfo_cwnd = transport->cwnd;
5287 pinfo.spinfo_srtt = transport->srtt;
5288 pinfo.spinfo_rto = jiffies_to_msecs(transport->rto);
5289 pinfo.spinfo_mtu = transport->pathmtu;
5291 if (pinfo.spinfo_state == SCTP_UNKNOWN)
5292 pinfo.spinfo_state = SCTP_ACTIVE;
5294 if (put_user(len, optlen)) {
5299 if (copy_to_user(optval, &pinfo, len)) {
5308 /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS)
5310 * This option is a on/off flag. If enabled no SCTP message
5311 * fragmentation will be performed. Instead if a message being sent
5312 * exceeds the current PMTU size, the message will NOT be sent and
5313 * instead a error will be indicated to the user.
5315 static int sctp_getsockopt_disable_fragments(struct sock *sk, int len,
5316 char __user *optval, int __user *optlen)
5320 if (len < sizeof(int))
5324 val = (sctp_sk(sk)->disable_fragments == 1);
5325 if (put_user(len, optlen))
5327 if (copy_to_user(optval, &val, len))
5332 /* 7.1.15 Set notification and ancillary events (SCTP_EVENTS)
5334 * This socket option is used to specify various notifications and
5335 * ancillary data the user wishes to receive.
5337 static int sctp_getsockopt_events(struct sock *sk, int len, char __user *optval,
5340 struct sctp_event_subscribe subscribe;
5341 __u8 *sn_type = (__u8 *)&subscribe;
5346 if (len > sizeof(struct sctp_event_subscribe))
5347 len = sizeof(struct sctp_event_subscribe);
5348 if (put_user(len, optlen))
5351 for (i = 0; i < len; i++)
5352 sn_type[i] = sctp_ulpevent_type_enabled(sctp_sk(sk)->subscribe,
5353 SCTP_SN_TYPE_BASE + i);
5355 if (copy_to_user(optval, &subscribe, len))
5361 /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE)
5363 * This socket option is applicable to the UDP-style socket only. When
5364 * set it will cause associations that are idle for more than the
5365 * specified number of seconds to automatically close. An association
5366 * being idle is defined an association that has NOT sent or received
5367 * user data. The special value of '0' indicates that no automatic
5368 * close of any associations should be performed. The option expects an
5369 * integer defining the number of seconds of idle time before an
5370 * association is closed.
5372 static int sctp_getsockopt_autoclose(struct sock *sk, int len, char __user *optval, int __user *optlen)
5374 /* Applicable to UDP-style socket only */
5375 if (sctp_style(sk, TCP))
5377 if (len < sizeof(int))
5380 if (put_user(len, optlen))
5382 if (put_user(sctp_sk(sk)->autoclose, (int __user *)optval))
5387 /* Helper routine to branch off an association to a new socket. */
5388 int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp)
5390 struct sctp_association *asoc = sctp_id2assoc(sk, id);
5391 struct sctp_sock *sp = sctp_sk(sk);
5392 struct socket *sock;
5395 /* Do not peel off from one netns to another one. */
5396 if (!net_eq(current->nsproxy->net_ns, sock_net(sk)))
5402 /* An association cannot be branched off from an already peeled-off
5403 * socket, nor is this supported for tcp style sockets.
5405 if (!sctp_style(sk, UDP))
5408 /* Create a new socket. */
5409 err = sock_create(sk->sk_family, SOCK_SEQPACKET, IPPROTO_SCTP, &sock);
5413 sctp_copy_sock(sock->sk, sk, asoc);
5415 /* Make peeled-off sockets more like 1-1 accepted sockets.
5416 * Set the daddr and initialize id to something more random and also
5417 * copy over any ip options.
5419 sp->pf->to_sk_daddr(&asoc->peer.primary_addr, sk);
5420 sp->pf->copy_ip_options(sk, sock->sk);
5422 /* Populate the fields of the newsk from the oldsk and migrate the
5423 * asoc to the newsk.
5425 sctp_sock_migrate(sk, sock->sk, asoc, SCTP_SOCKET_UDP_HIGH_BANDWIDTH);
5431 EXPORT_SYMBOL(sctp_do_peeloff);
5433 static int sctp_getsockopt_peeloff_common(struct sock *sk, sctp_peeloff_arg_t *peeloff,
5434 struct file **newfile, unsigned flags)
5436 struct socket *newsock;
5439 retval = sctp_do_peeloff(sk, peeloff->associd, &newsock);
5443 /* Map the socket to an unused fd that can be returned to the user. */
5444 retval = get_unused_fd_flags(flags & SOCK_CLOEXEC);
5446 sock_release(newsock);
5450 *newfile = sock_alloc_file(newsock, 0, NULL);
5451 if (IS_ERR(*newfile)) {
5452 put_unused_fd(retval);
5453 retval = PTR_ERR(*newfile);
5458 pr_debug("%s: sk:%p, newsk:%p, sd:%d\n", __func__, sk, newsock->sk,
5461 peeloff->sd = retval;
5463 if (flags & SOCK_NONBLOCK)
5464 (*newfile)->f_flags |= O_NONBLOCK;
5469 static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval, int __user *optlen)
5471 sctp_peeloff_arg_t peeloff;
5472 struct file *newfile = NULL;
5475 if (len < sizeof(sctp_peeloff_arg_t))
5477 len = sizeof(sctp_peeloff_arg_t);
5478 if (copy_from_user(&peeloff, optval, len))
5481 retval = sctp_getsockopt_peeloff_common(sk, &peeloff, &newfile, 0);
5485 /* Return the fd mapped to the new socket. */
5486 if (put_user(len, optlen)) {
5488 put_unused_fd(retval);
5492 if (copy_to_user(optval, &peeloff, len)) {
5494 put_unused_fd(retval);
5497 fd_install(retval, newfile);
5502 static int sctp_getsockopt_peeloff_flags(struct sock *sk, int len,
5503 char __user *optval, int __user *optlen)
5505 sctp_peeloff_flags_arg_t peeloff;
5506 struct file *newfile = NULL;
5509 if (len < sizeof(sctp_peeloff_flags_arg_t))
5511 len = sizeof(sctp_peeloff_flags_arg_t);
5512 if (copy_from_user(&peeloff, optval, len))
5515 retval = sctp_getsockopt_peeloff_common(sk, &peeloff.p_arg,
5516 &newfile, peeloff.flags);
5520 /* Return the fd mapped to the new socket. */
5521 if (put_user(len, optlen)) {
5523 put_unused_fd(retval);
5527 if (copy_to_user(optval, &peeloff, len)) {
5529 put_unused_fd(retval);
5532 fd_install(retval, newfile);
5537 /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS)
5539 * Applications can enable or disable heartbeats for any peer address of
5540 * an association, modify an address's heartbeat interval, force a
5541 * heartbeat to be sent immediately, and adjust the address's maximum
5542 * number of retransmissions sent before an address is considered
5543 * unreachable. The following structure is used to access and modify an
5544 * address's parameters:
5546 * struct sctp_paddrparams {
5547 * sctp_assoc_t spp_assoc_id;
5548 * struct sockaddr_storage spp_address;
5549 * uint32_t spp_hbinterval;
5550 * uint16_t spp_pathmaxrxt;
5551 * uint32_t spp_pathmtu;
5552 * uint32_t spp_sackdelay;
5553 * uint32_t spp_flags;
5556 * spp_assoc_id - (one-to-many style socket) This is filled in the
5557 * application, and identifies the association for
5559 * spp_address - This specifies which address is of interest.
5560 * spp_hbinterval - This contains the value of the heartbeat interval,
5561 * in milliseconds. If a value of zero
5562 * is present in this field then no changes are to
5563 * be made to this parameter.
5564 * spp_pathmaxrxt - This contains the maximum number of
5565 * retransmissions before this address shall be
5566 * considered unreachable. If a value of zero
5567 * is present in this field then no changes are to
5568 * be made to this parameter.
5569 * spp_pathmtu - When Path MTU discovery is disabled the value
5570 * specified here will be the "fixed" path mtu.
5571 * Note that if the spp_address field is empty
5572 * then all associations on this address will
5573 * have this fixed path mtu set upon them.
5575 * spp_sackdelay - When delayed sack is enabled, this value specifies
5576 * the number of milliseconds that sacks will be delayed
5577 * for. This value will apply to all addresses of an
5578 * association if the spp_address field is empty. Note
5579 * also, that if delayed sack is enabled and this
5580 * value is set to 0, no change is made to the last
5581 * recorded delayed sack timer value.
5583 * spp_flags - These flags are used to control various features
5584 * on an association. The flag field may contain
5585 * zero or more of the following options.
5587 * SPP_HB_ENABLE - Enable heartbeats on the
5588 * specified address. Note that if the address
5589 * field is empty all addresses for the association
5590 * have heartbeats enabled upon them.
5592 * SPP_HB_DISABLE - Disable heartbeats on the
5593 * speicifed address. Note that if the address
5594 * field is empty all addresses for the association
5595 * will have their heartbeats disabled. Note also
5596 * that SPP_HB_ENABLE and SPP_HB_DISABLE are
5597 * mutually exclusive, only one of these two should
5598 * be specified. Enabling both fields will have
5599 * undetermined results.
5601 * SPP_HB_DEMAND - Request a user initiated heartbeat
5602 * to be made immediately.
5604 * SPP_PMTUD_ENABLE - This field will enable PMTU
5605 * discovery upon the specified address. Note that
5606 * if the address feild is empty then all addresses
5607 * on the association are effected.
5609 * SPP_PMTUD_DISABLE - This field will disable PMTU
5610 * discovery upon the specified address. Note that
5611 * if the address feild is empty then all addresses
5612 * on the association are effected. Not also that
5613 * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually
5614 * exclusive. Enabling both will have undetermined
5617 * SPP_SACKDELAY_ENABLE - Setting this flag turns
5618 * on delayed sack. The time specified in spp_sackdelay
5619 * is used to specify the sack delay for this address. Note
5620 * that if spp_address is empty then all addresses will
5621 * enable delayed sack and take on the sack delay
5622 * value specified in spp_sackdelay.
5623 * SPP_SACKDELAY_DISABLE - Setting this flag turns
5624 * off delayed sack. If the spp_address field is blank then
5625 * delayed sack is disabled for the entire association. Note
5626 * also that this field is mutually exclusive to
5627 * SPP_SACKDELAY_ENABLE, setting both will have undefined
5630 * SPP_IPV6_FLOWLABEL: Setting this flag enables the
5631 * setting of the IPV6 flow label value. The value is
5632 * contained in the spp_ipv6_flowlabel field.
5633 * Upon retrieval, this flag will be set to indicate that
5634 * the spp_ipv6_flowlabel field has a valid value returned.
5635 * If a specific destination address is set (in the
5636 * spp_address field), then the value returned is that of
5637 * the address. If just an association is specified (and
5638 * no address), then the association's default flow label
5639 * is returned. If neither an association nor a destination
5640 * is specified, then the socket's default flow label is
5641 * returned. For non-IPv6 sockets, this flag will be left
5644 * SPP_DSCP: Setting this flag enables the setting of the
5645 * Differentiated Services Code Point (DSCP) value
5646 * associated with either the association or a specific
5647 * address. The value is obtained in the spp_dscp field.
5648 * Upon retrieval, this flag will be set to indicate that
5649 * the spp_dscp field has a valid value returned. If a
5650 * specific destination address is set when called (in the
5651 * spp_address field), then that specific destination
5652 * address's DSCP value is returned. If just an association
5653 * is specified, then the association's default DSCP is
5654 * returned. If neither an association nor a destination is
5655 * specified, then the socket's default DSCP is returned.
5657 * spp_ipv6_flowlabel
5658 * - This field is used in conjunction with the
5659 * SPP_IPV6_FLOWLABEL flag and contains the IPv6 flow label.
5660 * The 20 least significant bits are used for the flow
5661 * label. This setting has precedence over any IPv6-layer
5664 * spp_dscp - This field is used in conjunction with the SPP_DSCP flag
5665 * and contains the DSCP. The 6 most significant bits are
5666 * used for the DSCP. This setting has precedence over any
5667 * IPv4- or IPv6- layer setting.
5669 static int sctp_getsockopt_peer_addr_params(struct sock *sk, int len,
5670 char __user *optval, int __user *optlen)
5672 struct sctp_paddrparams params;
5673 struct sctp_transport *trans = NULL;
5674 struct sctp_association *asoc = NULL;
5675 struct sctp_sock *sp = sctp_sk(sk);
5677 if (len >= sizeof(params))
5678 len = sizeof(params);
5679 else if (len >= ALIGN(offsetof(struct sctp_paddrparams,
5680 spp_ipv6_flowlabel), 4))
5681 len = ALIGN(offsetof(struct sctp_paddrparams,
5682 spp_ipv6_flowlabel), 4);
5686 if (copy_from_user(¶ms, optval, len))
5689 /* If an address other than INADDR_ANY is specified, and
5690 * no transport is found, then the request is invalid.
5692 if (!sctp_is_any(sk, (union sctp_addr *)¶ms.spp_address)) {
5693 trans = sctp_addr_id2transport(sk, ¶ms.spp_address,
5694 params.spp_assoc_id);
5696 pr_debug("%s: failed no transport\n", __func__);
5701 /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
5702 * socket is a one to many style socket, and an association
5703 * was not found, then the id was invalid.
5705 asoc = sctp_id2assoc(sk, params.spp_assoc_id);
5706 if (!asoc && params.spp_assoc_id != SCTP_FUTURE_ASSOC &&
5707 sctp_style(sk, UDP)) {
5708 pr_debug("%s: failed no association\n", __func__);
5713 /* Fetch transport values. */
5714 params.spp_hbinterval = jiffies_to_msecs(trans->hbinterval);
5715 params.spp_pathmtu = trans->pathmtu;
5716 params.spp_pathmaxrxt = trans->pathmaxrxt;
5717 params.spp_sackdelay = jiffies_to_msecs(trans->sackdelay);
5719 /*draft-11 doesn't say what to return in spp_flags*/
5720 params.spp_flags = trans->param_flags;
5721 if (trans->flowlabel & SCTP_FLOWLABEL_SET_MASK) {
5722 params.spp_ipv6_flowlabel = trans->flowlabel &
5723 SCTP_FLOWLABEL_VAL_MASK;
5724 params.spp_flags |= SPP_IPV6_FLOWLABEL;
5726 if (trans->dscp & SCTP_DSCP_SET_MASK) {
5727 params.spp_dscp = trans->dscp & SCTP_DSCP_VAL_MASK;
5728 params.spp_flags |= SPP_DSCP;
5731 /* Fetch association values. */
5732 params.spp_hbinterval = jiffies_to_msecs(asoc->hbinterval);
5733 params.spp_pathmtu = asoc->pathmtu;
5734 params.spp_pathmaxrxt = asoc->pathmaxrxt;
5735 params.spp_sackdelay = jiffies_to_msecs(asoc->sackdelay);
5737 /*draft-11 doesn't say what to return in spp_flags*/
5738 params.spp_flags = asoc->param_flags;
5739 if (asoc->flowlabel & SCTP_FLOWLABEL_SET_MASK) {
5740 params.spp_ipv6_flowlabel = asoc->flowlabel &
5741 SCTP_FLOWLABEL_VAL_MASK;
5742 params.spp_flags |= SPP_IPV6_FLOWLABEL;
5744 if (asoc->dscp & SCTP_DSCP_SET_MASK) {
5745 params.spp_dscp = asoc->dscp & SCTP_DSCP_VAL_MASK;
5746 params.spp_flags |= SPP_DSCP;
5749 /* Fetch socket values. */
5750 params.spp_hbinterval = sp->hbinterval;
5751 params.spp_pathmtu = sp->pathmtu;
5752 params.spp_sackdelay = sp->sackdelay;
5753 params.spp_pathmaxrxt = sp->pathmaxrxt;
5755 /*draft-11 doesn't say what to return in spp_flags*/
5756 params.spp_flags = sp->param_flags;
5757 if (sp->flowlabel & SCTP_FLOWLABEL_SET_MASK) {
5758 params.spp_ipv6_flowlabel = sp->flowlabel &
5759 SCTP_FLOWLABEL_VAL_MASK;
5760 params.spp_flags |= SPP_IPV6_FLOWLABEL;
5762 if (sp->dscp & SCTP_DSCP_SET_MASK) {
5763 params.spp_dscp = sp->dscp & SCTP_DSCP_VAL_MASK;
5764 params.spp_flags |= SPP_DSCP;
5768 if (copy_to_user(optval, ¶ms, len))
5771 if (put_user(len, optlen))
5778 * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK)
5780 * This option will effect the way delayed acks are performed. This
5781 * option allows you to get or set the delayed ack time, in
5782 * milliseconds. It also allows changing the delayed ack frequency.
5783 * Changing the frequency to 1 disables the delayed sack algorithm. If
5784 * the assoc_id is 0, then this sets or gets the endpoints default
5785 * values. If the assoc_id field is non-zero, then the set or get
5786 * effects the specified association for the one to many model (the
5787 * assoc_id field is ignored by the one to one model). Note that if
5788 * sack_delay or sack_freq are 0 when setting this option, then the
5789 * current values will remain unchanged.
5791 * struct sctp_sack_info {
5792 * sctp_assoc_t sack_assoc_id;
5793 * uint32_t sack_delay;
5794 * uint32_t sack_freq;
5797 * sack_assoc_id - This parameter, indicates which association the user
5798 * is performing an action upon. Note that if this field's value is
5799 * zero then the endpoints default value is changed (effecting future
5800 * associations only).
5802 * sack_delay - This parameter contains the number of milliseconds that
5803 * the user is requesting the delayed ACK timer be set to. Note that
5804 * this value is defined in the standard to be between 200 and 500
5807 * sack_freq - This parameter contains the number of packets that must
5808 * be received before a sack is sent without waiting for the delay
5809 * timer to expire. The default value for this is 2, setting this
5810 * value to 1 will disable the delayed sack algorithm.
5812 static int sctp_getsockopt_delayed_ack(struct sock *sk, int len,
5813 char __user *optval,
5816 struct sctp_sack_info params;
5817 struct sctp_association *asoc = NULL;
5818 struct sctp_sock *sp = sctp_sk(sk);
5820 if (len >= sizeof(struct sctp_sack_info)) {
5821 len = sizeof(struct sctp_sack_info);
5823 if (copy_from_user(¶ms, optval, len))
5825 } else if (len == sizeof(struct sctp_assoc_value)) {
5826 pr_warn_ratelimited(DEPRECATED
5828 "Use of struct sctp_assoc_value in delayed_ack socket option.\n"
5829 "Use struct sctp_sack_info instead\n",
5830 current->comm, task_pid_nr(current));
5831 if (copy_from_user(¶ms, optval, len))
5836 /* Get association, if sack_assoc_id != 0 and the socket is a one
5837 * to many style socket, and an association was not found, then
5838 * the id was invalid.
5840 asoc = sctp_id2assoc(sk, params.sack_assoc_id);
5841 if (!asoc && params.sack_assoc_id && sctp_style(sk, UDP))
5845 /* Fetch association values. */
5846 if (asoc->param_flags & SPP_SACKDELAY_ENABLE) {
5847 params.sack_delay = jiffies_to_msecs(
5849 params.sack_freq = asoc->sackfreq;
5852 params.sack_delay = 0;
5853 params.sack_freq = 1;
5856 /* Fetch socket values. */
5857 if (sp->param_flags & SPP_SACKDELAY_ENABLE) {
5858 params.sack_delay = sp->sackdelay;
5859 params.sack_freq = sp->sackfreq;
5861 params.sack_delay = 0;
5862 params.sack_freq = 1;
5866 if (copy_to_user(optval, ¶ms, len))
5869 if (put_user(len, optlen))
5875 /* 7.1.3 Initialization Parameters (SCTP_INITMSG)
5877 * Applications can specify protocol parameters for the default association
5878 * initialization. The option name argument to setsockopt() and getsockopt()
5881 * Setting initialization parameters is effective only on an unconnected
5882 * socket (for UDP-style sockets only future associations are effected
5883 * by the change). With TCP-style sockets, this option is inherited by
5884 * sockets derived from a listener socket.
5886 static int sctp_getsockopt_initmsg(struct sock *sk, int len, char __user *optval, int __user *optlen)
5888 if (len < sizeof(struct sctp_initmsg))
5890 len = sizeof(struct sctp_initmsg);
5891 if (put_user(len, optlen))
5893 if (copy_to_user(optval, &sctp_sk(sk)->initmsg, len))
5899 static int sctp_getsockopt_peer_addrs(struct sock *sk, int len,
5900 char __user *optval, int __user *optlen)
5902 struct sctp_association *asoc;
5904 struct sctp_getaddrs getaddrs;
5905 struct sctp_transport *from;
5907 union sctp_addr temp;
5908 struct sctp_sock *sp = sctp_sk(sk);
5913 if (len < sizeof(struct sctp_getaddrs))
5916 if (copy_from_user(&getaddrs, optval, sizeof(struct sctp_getaddrs)))
5919 /* For UDP-style sockets, id specifies the association to query. */
5920 asoc = sctp_id2assoc(sk, getaddrs.assoc_id);
5924 to = optval + offsetof(struct sctp_getaddrs, addrs);
5925 space_left = len - offsetof(struct sctp_getaddrs, addrs);
5927 list_for_each_entry(from, &asoc->peer.transport_addr_list,
5929 memcpy(&temp, &from->ipaddr, sizeof(temp));
5930 addrlen = sctp_get_pf_specific(sk->sk_family)
5931 ->addr_to_user(sp, &temp);
5932 if (space_left < addrlen)
5934 if (copy_to_user(to, &temp, addrlen))
5938 space_left -= addrlen;
5941 if (put_user(cnt, &((struct sctp_getaddrs __user *)optval)->addr_num))
5943 bytes_copied = ((char __user *)to) - optval;
5944 if (put_user(bytes_copied, optlen))
5950 static int sctp_copy_laddrs(struct sock *sk, __u16 port, void *to,
5951 size_t space_left, int *bytes_copied)
5953 struct sctp_sockaddr_entry *addr;
5954 union sctp_addr temp;
5957 struct net *net = sock_net(sk);
5960 list_for_each_entry_rcu(addr, &net->sctp.local_addr_list, list) {
5964 if ((PF_INET == sk->sk_family) &&
5965 (AF_INET6 == addr->a.sa.sa_family))
5967 if ((PF_INET6 == sk->sk_family) &&
5968 inet_v6_ipv6only(sk) &&
5969 (AF_INET == addr->a.sa.sa_family))
5971 memcpy(&temp, &addr->a, sizeof(temp));
5972 if (!temp.v4.sin_port)
5973 temp.v4.sin_port = htons(port);
5975 addrlen = sctp_get_pf_specific(sk->sk_family)
5976 ->addr_to_user(sctp_sk(sk), &temp);
5978 if (space_left < addrlen) {
5982 memcpy(to, &temp, addrlen);
5986 space_left -= addrlen;
5987 *bytes_copied += addrlen;
5995 static int sctp_getsockopt_local_addrs(struct sock *sk, int len,
5996 char __user *optval, int __user *optlen)
5998 struct sctp_bind_addr *bp;
5999 struct sctp_association *asoc;
6001 struct sctp_getaddrs getaddrs;
6002 struct sctp_sockaddr_entry *addr;
6004 union sctp_addr temp;
6005 struct sctp_sock *sp = sctp_sk(sk);
6009 int bytes_copied = 0;
6013 if (len < sizeof(struct sctp_getaddrs))
6016 if (copy_from_user(&getaddrs, optval, sizeof(struct sctp_getaddrs)))
6020 * For UDP-style sockets, id specifies the association to query.
6021 * If the id field is set to the value '0' then the locally bound
6022 * addresses are returned without regard to any particular
6025 if (0 == getaddrs.assoc_id) {
6026 bp = &sctp_sk(sk)->ep->base.bind_addr;
6028 asoc = sctp_id2assoc(sk, getaddrs.assoc_id);
6031 bp = &asoc->base.bind_addr;
6034 to = optval + offsetof(struct sctp_getaddrs, addrs);
6035 space_left = len - offsetof(struct sctp_getaddrs, addrs);
6037 addrs = kmalloc(space_left, GFP_USER | __GFP_NOWARN);
6041 /* If the endpoint is bound to 0.0.0.0 or ::0, get the valid
6042 * addresses from the global local address list.
6044 if (sctp_list_single_entry(&bp->address_list)) {
6045 addr = list_entry(bp->address_list.next,
6046 struct sctp_sockaddr_entry, list);
6047 if (sctp_is_any(sk, &addr->a)) {
6048 cnt = sctp_copy_laddrs(sk, bp->port, addrs,
6049 space_left, &bytes_copied);
6059 /* Protection on the bound address list is not needed since
6060 * in the socket option context we hold a socket lock and
6061 * thus the bound address list can't change.
6063 list_for_each_entry(addr, &bp->address_list, list) {
6064 memcpy(&temp, &addr->a, sizeof(temp));
6065 addrlen = sctp_get_pf_specific(sk->sk_family)
6066 ->addr_to_user(sp, &temp);
6067 if (space_left < addrlen) {
6068 err = -ENOMEM; /*fixme: right error?*/
6071 memcpy(buf, &temp, addrlen);
6073 bytes_copied += addrlen;
6075 space_left -= addrlen;
6079 if (copy_to_user(to, addrs, bytes_copied)) {
6083 if (put_user(cnt, &((struct sctp_getaddrs __user *)optval)->addr_num)) {
6087 /* XXX: We should have accounted for sizeof(struct sctp_getaddrs) too,
6088 * but we can't change it anymore.
6090 if (put_user(bytes_copied, optlen))
6097 /* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
6099 * Requests that the local SCTP stack use the enclosed peer address as
6100 * the association primary. The enclosed address must be one of the
6101 * association peer's addresses.
6103 static int sctp_getsockopt_primary_addr(struct sock *sk, int len,
6104 char __user *optval, int __user *optlen)
6106 struct sctp_prim prim;
6107 struct sctp_association *asoc;
6108 struct sctp_sock *sp = sctp_sk(sk);
6110 if (len < sizeof(struct sctp_prim))
6113 len = sizeof(struct sctp_prim);
6115 if (copy_from_user(&prim, optval, len))
6118 asoc = sctp_id2assoc(sk, prim.ssp_assoc_id);
6122 if (!asoc->peer.primary_path)
6125 memcpy(&prim.ssp_addr, &asoc->peer.primary_path->ipaddr,
6126 asoc->peer.primary_path->af_specific->sockaddr_len);
6128 sctp_get_pf_specific(sk->sk_family)->addr_to_user(sp,
6129 (union sctp_addr *)&prim.ssp_addr);
6131 if (put_user(len, optlen))
6133 if (copy_to_user(optval, &prim, len))
6140 * 7.1.11 Set Adaptation Layer Indicator (SCTP_ADAPTATION_LAYER)
6142 * Requests that the local endpoint set the specified Adaptation Layer
6143 * Indication parameter for all future INIT and INIT-ACK exchanges.
6145 static int sctp_getsockopt_adaptation_layer(struct sock *sk, int len,
6146 char __user *optval, int __user *optlen)
6148 struct sctp_setadaptation adaptation;
6150 if (len < sizeof(struct sctp_setadaptation))
6153 len = sizeof(struct sctp_setadaptation);
6155 adaptation.ssb_adaptation_ind = sctp_sk(sk)->adaptation_ind;
6157 if (put_user(len, optlen))
6159 if (copy_to_user(optval, &adaptation, len))
6167 * 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM)
6169 * Applications that wish to use the sendto() system call may wish to
6170 * specify a default set of parameters that would normally be supplied
6171 * through the inclusion of ancillary data. This socket option allows
6172 * such an application to set the default sctp_sndrcvinfo structure.
6175 * The application that wishes to use this socket option simply passes
6176 * in to this call the sctp_sndrcvinfo structure defined in Section
6177 * 5.2.2) The input parameters accepted by this call include
6178 * sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context,
6179 * sinfo_timetolive. The user must provide the sinfo_assoc_id field in
6180 * to this call if the caller is using the UDP model.
6182 * For getsockopt, it get the default sctp_sndrcvinfo structure.
6184 static int sctp_getsockopt_default_send_param(struct sock *sk,
6185 int len, char __user *optval,
6188 struct sctp_sock *sp = sctp_sk(sk);
6189 struct sctp_association *asoc;
6190 struct sctp_sndrcvinfo info;
6192 if (len < sizeof(info))
6197 if (copy_from_user(&info, optval, len))
6200 asoc = sctp_id2assoc(sk, info.sinfo_assoc_id);
6201 if (!asoc && info.sinfo_assoc_id && sctp_style(sk, UDP))
6204 info.sinfo_stream = asoc->default_stream;
6205 info.sinfo_flags = asoc->default_flags;
6206 info.sinfo_ppid = asoc->default_ppid;
6207 info.sinfo_context = asoc->default_context;
6208 info.sinfo_timetolive = asoc->default_timetolive;
6210 info.sinfo_stream = sp->default_stream;
6211 info.sinfo_flags = sp->default_flags;
6212 info.sinfo_ppid = sp->default_ppid;
6213 info.sinfo_context = sp->default_context;
6214 info.sinfo_timetolive = sp->default_timetolive;
6217 if (put_user(len, optlen))
6219 if (copy_to_user(optval, &info, len))
6225 /* RFC6458, Section 8.1.31. Set/get Default Send Parameters
6226 * (SCTP_DEFAULT_SNDINFO)
6228 static int sctp_getsockopt_default_sndinfo(struct sock *sk, int len,
6229 char __user *optval,
6232 struct sctp_sock *sp = sctp_sk(sk);
6233 struct sctp_association *asoc;
6234 struct sctp_sndinfo info;
6236 if (len < sizeof(info))
6241 if (copy_from_user(&info, optval, len))
6244 asoc = sctp_id2assoc(sk, info.snd_assoc_id);
6245 if (!asoc && info.snd_assoc_id && sctp_style(sk, UDP))
6248 info.snd_sid = asoc->default_stream;
6249 info.snd_flags = asoc->default_flags;
6250 info.snd_ppid = asoc->default_ppid;
6251 info.snd_context = asoc->default_context;
6253 info.snd_sid = sp->default_stream;
6254 info.snd_flags = sp->default_flags;
6255 info.snd_ppid = sp->default_ppid;
6256 info.snd_context = sp->default_context;
6259 if (put_user(len, optlen))
6261 if (copy_to_user(optval, &info, len))
6269 * 7.1.5 SCTP_NODELAY
6271 * Turn on/off any Nagle-like algorithm. This means that packets are
6272 * generally sent as soon as possible and no unnecessary delays are
6273 * introduced, at the cost of more packets in the network. Expects an
6274 * integer boolean flag.
6277 static int sctp_getsockopt_nodelay(struct sock *sk, int len,
6278 char __user *optval, int __user *optlen)
6282 if (len < sizeof(int))
6286 val = (sctp_sk(sk)->nodelay == 1);
6287 if (put_user(len, optlen))
6289 if (copy_to_user(optval, &val, len))
6296 * 7.1.1 SCTP_RTOINFO
6298 * The protocol parameters used to initialize and bound retransmission
6299 * timeout (RTO) are tunable. sctp_rtoinfo structure is used to access
6300 * and modify these parameters.
6301 * All parameters are time values, in milliseconds. A value of 0, when
6302 * modifying the parameters, indicates that the current value should not
6306 static int sctp_getsockopt_rtoinfo(struct sock *sk, int len,
6307 char __user *optval,
6308 int __user *optlen) {
6309 struct sctp_rtoinfo rtoinfo;
6310 struct sctp_association *asoc;
6312 if (len < sizeof (struct sctp_rtoinfo))
6315 len = sizeof(struct sctp_rtoinfo);
6317 if (copy_from_user(&rtoinfo, optval, len))
6320 asoc = sctp_id2assoc(sk, rtoinfo.srto_assoc_id);
6322 if (!asoc && rtoinfo.srto_assoc_id != SCTP_FUTURE_ASSOC &&
6323 sctp_style(sk, UDP))
6326 /* Values corresponding to the specific association. */
6328 rtoinfo.srto_initial = jiffies_to_msecs(asoc->rto_initial);
6329 rtoinfo.srto_max = jiffies_to_msecs(asoc->rto_max);
6330 rtoinfo.srto_min = jiffies_to_msecs(asoc->rto_min);
6332 /* Values corresponding to the endpoint. */
6333 struct sctp_sock *sp = sctp_sk(sk);
6335 rtoinfo.srto_initial = sp->rtoinfo.srto_initial;
6336 rtoinfo.srto_max = sp->rtoinfo.srto_max;
6337 rtoinfo.srto_min = sp->rtoinfo.srto_min;
6340 if (put_user(len, optlen))
6343 if (copy_to_user(optval, &rtoinfo, len))
6351 * 7.1.2 SCTP_ASSOCINFO
6353 * This option is used to tune the maximum retransmission attempts
6354 * of the association.
6355 * Returns an error if the new association retransmission value is
6356 * greater than the sum of the retransmission value of the peer.
6357 * See [SCTP] for more information.
6360 static int sctp_getsockopt_associnfo(struct sock *sk, int len,
6361 char __user *optval,
6365 struct sctp_assocparams assocparams;
6366 struct sctp_association *asoc;
6367 struct list_head *pos;
6370 if (len < sizeof (struct sctp_assocparams))
6373 len = sizeof(struct sctp_assocparams);
6375 if (copy_from_user(&assocparams, optval, len))
6378 asoc = sctp_id2assoc(sk, assocparams.sasoc_assoc_id);
6380 if (!asoc && assocparams.sasoc_assoc_id != SCTP_FUTURE_ASSOC &&
6381 sctp_style(sk, UDP))
6384 /* Values correspoinding to the specific association */
6386 assocparams.sasoc_asocmaxrxt = asoc->max_retrans;
6387 assocparams.sasoc_peer_rwnd = asoc->peer.rwnd;
6388 assocparams.sasoc_local_rwnd = asoc->a_rwnd;
6389 assocparams.sasoc_cookie_life = ktime_to_ms(asoc->cookie_life);
6391 list_for_each(pos, &asoc->peer.transport_addr_list) {
6395 assocparams.sasoc_number_peer_destinations = cnt;
6397 /* Values corresponding to the endpoint */
6398 struct sctp_sock *sp = sctp_sk(sk);
6400 assocparams.sasoc_asocmaxrxt = sp->assocparams.sasoc_asocmaxrxt;
6401 assocparams.sasoc_peer_rwnd = sp->assocparams.sasoc_peer_rwnd;
6402 assocparams.sasoc_local_rwnd = sp->assocparams.sasoc_local_rwnd;
6403 assocparams.sasoc_cookie_life =
6404 sp->assocparams.sasoc_cookie_life;
6405 assocparams.sasoc_number_peer_destinations =
6407 sasoc_number_peer_destinations;
6410 if (put_user(len, optlen))
6413 if (copy_to_user(optval, &assocparams, len))
6420 * 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR)
6422 * This socket option is a boolean flag which turns on or off mapped V4
6423 * addresses. If this option is turned on and the socket is type
6424 * PF_INET6, then IPv4 addresses will be mapped to V6 representation.
6425 * If this option is turned off, then no mapping will be done of V4
6426 * addresses and a user will receive both PF_INET6 and PF_INET type
6427 * addresses on the socket.
6429 static int sctp_getsockopt_mappedv4(struct sock *sk, int len,
6430 char __user *optval, int __user *optlen)
6433 struct sctp_sock *sp = sctp_sk(sk);
6435 if (len < sizeof(int))
6440 if (put_user(len, optlen))
6442 if (copy_to_user(optval, &val, len))
6449 * 7.1.29. Set or Get the default context (SCTP_CONTEXT)
6450 * (chapter and verse is quoted at sctp_setsockopt_context())
6452 static int sctp_getsockopt_context(struct sock *sk, int len,
6453 char __user *optval, int __user *optlen)
6455 struct sctp_assoc_value params;
6456 struct sctp_sock *sp;
6457 struct sctp_association *asoc;
6459 if (len < sizeof(struct sctp_assoc_value))
6462 len = sizeof(struct sctp_assoc_value);
6464 if (copy_from_user(¶ms, optval, len))
6469 if (params.assoc_id != 0) {
6470 asoc = sctp_id2assoc(sk, params.assoc_id);
6473 params.assoc_value = asoc->default_rcv_context;
6475 params.assoc_value = sp->default_rcv_context;
6478 if (put_user(len, optlen))
6480 if (copy_to_user(optval, ¶ms, len))
6487 * 8.1.16. Get or Set the Maximum Fragmentation Size (SCTP_MAXSEG)
6488 * This option will get or set the maximum size to put in any outgoing
6489 * SCTP DATA chunk. If a message is larger than this size it will be
6490 * fragmented by SCTP into the specified size. Note that the underlying
6491 * SCTP implementation may fragment into smaller sized chunks when the
6492 * PMTU of the underlying association is smaller than the value set by
6493 * the user. The default value for this option is '0' which indicates
6494 * the user is NOT limiting fragmentation and only the PMTU will effect
6495 * SCTP's choice of DATA chunk size. Note also that values set larger
6496 * than the maximum size of an IP datagram will effectively let SCTP
6497 * control fragmentation (i.e. the same as setting this option to 0).
6499 * The following structure is used to access and modify this parameter:
6501 * struct sctp_assoc_value {
6502 * sctp_assoc_t assoc_id;
6503 * uint32_t assoc_value;
6506 * assoc_id: This parameter is ignored for one-to-one style sockets.
6507 * For one-to-many style sockets this parameter indicates which
6508 * association the user is performing an action upon. Note that if
6509 * this field's value is zero then the endpoints default value is
6510 * changed (effecting future associations only).
6511 * assoc_value: This parameter specifies the maximum size in bytes.
6513 static int sctp_getsockopt_maxseg(struct sock *sk, int len,
6514 char __user *optval, int __user *optlen)
6516 struct sctp_assoc_value params;
6517 struct sctp_association *asoc;
6519 if (len == sizeof(int)) {
6520 pr_warn_ratelimited(DEPRECATED
6522 "Use of int in maxseg socket option.\n"
6523 "Use struct sctp_assoc_value instead\n",
6524 current->comm, task_pid_nr(current));
6525 params.assoc_id = SCTP_FUTURE_ASSOC;
6526 } else if (len >= sizeof(struct sctp_assoc_value)) {
6527 len = sizeof(struct sctp_assoc_value);
6528 if (copy_from_user(¶ms, optval, len))
6533 asoc = sctp_id2assoc(sk, params.assoc_id);
6534 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
6535 sctp_style(sk, UDP))
6539 params.assoc_value = asoc->frag_point;
6541 params.assoc_value = sctp_sk(sk)->user_frag;
6543 if (put_user(len, optlen))
6545 if (len == sizeof(int)) {
6546 if (copy_to_user(optval, ¶ms.assoc_value, len))
6549 if (copy_to_user(optval, ¶ms, len))
6557 * 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE)
6558 * (chapter and verse is quoted at sctp_setsockopt_fragment_interleave())
6560 static int sctp_getsockopt_fragment_interleave(struct sock *sk, int len,
6561 char __user *optval, int __user *optlen)
6565 if (len < sizeof(int))
6570 val = sctp_sk(sk)->frag_interleave;
6571 if (put_user(len, optlen))
6573 if (copy_to_user(optval, &val, len))
6580 * 7.1.25. Set or Get the sctp partial delivery point
6581 * (chapter and verse is quoted at sctp_setsockopt_partial_delivery_point())
6583 static int sctp_getsockopt_partial_delivery_point(struct sock *sk, int len,
6584 char __user *optval,
6589 if (len < sizeof(u32))
6594 val = sctp_sk(sk)->pd_point;
6595 if (put_user(len, optlen))
6597 if (copy_to_user(optval, &val, len))
6604 * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST)
6605 * (chapter and verse is quoted at sctp_setsockopt_maxburst())
6607 static int sctp_getsockopt_maxburst(struct sock *sk, int len,
6608 char __user *optval,
6611 struct sctp_assoc_value params;
6612 struct sctp_sock *sp;
6613 struct sctp_association *asoc;
6615 if (len == sizeof(int)) {
6616 pr_warn_ratelimited(DEPRECATED
6618 "Use of int in max_burst socket option.\n"
6619 "Use struct sctp_assoc_value instead\n",
6620 current->comm, task_pid_nr(current));
6621 params.assoc_id = 0;
6622 } else if (len >= sizeof(struct sctp_assoc_value)) {
6623 len = sizeof(struct sctp_assoc_value);
6624 if (copy_from_user(¶ms, optval, len))
6631 if (params.assoc_id != 0) {
6632 asoc = sctp_id2assoc(sk, params.assoc_id);
6635 params.assoc_value = asoc->max_burst;
6637 params.assoc_value = sp->max_burst;
6639 if (len == sizeof(int)) {
6640 if (copy_to_user(optval, ¶ms.assoc_value, len))
6643 if (copy_to_user(optval, ¶ms, len))
6651 static int sctp_getsockopt_hmac_ident(struct sock *sk, int len,
6652 char __user *optval, int __user *optlen)
6654 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
6655 struct sctp_hmacalgo __user *p = (void __user *)optval;
6656 struct sctp_hmac_algo_param *hmacs;
6661 if (!ep->auth_enable)
6664 hmacs = ep->auth_hmacs_list;
6665 data_len = ntohs(hmacs->param_hdr.length) -
6666 sizeof(struct sctp_paramhdr);
6668 if (len < sizeof(struct sctp_hmacalgo) + data_len)
6671 len = sizeof(struct sctp_hmacalgo) + data_len;
6672 num_idents = data_len / sizeof(u16);
6674 if (put_user(len, optlen))
6676 if (put_user(num_idents, &p->shmac_num_idents))
6678 for (i = 0; i < num_idents; i++) {
6679 __u16 hmacid = ntohs(hmacs->hmac_ids[i]);
6681 if (copy_to_user(&p->shmac_idents[i], &hmacid, sizeof(__u16)))
6687 static int sctp_getsockopt_active_key(struct sock *sk, int len,
6688 char __user *optval, int __user *optlen)
6690 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
6691 struct sctp_authkeyid val;
6692 struct sctp_association *asoc;
6694 if (!ep->auth_enable)
6697 if (len < sizeof(struct sctp_authkeyid))
6700 len = sizeof(struct sctp_authkeyid);
6701 if (copy_from_user(&val, optval, len))
6704 asoc = sctp_id2assoc(sk, val.scact_assoc_id);
6705 if (!asoc && val.scact_assoc_id && sctp_style(sk, UDP))
6709 val.scact_keynumber = asoc->active_key_id;
6711 val.scact_keynumber = ep->active_key_id;
6713 if (put_user(len, optlen))
6715 if (copy_to_user(optval, &val, len))
6721 static int sctp_getsockopt_peer_auth_chunks(struct sock *sk, int len,
6722 char __user *optval, int __user *optlen)
6724 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
6725 struct sctp_authchunks __user *p = (void __user *)optval;
6726 struct sctp_authchunks val;
6727 struct sctp_association *asoc;
6728 struct sctp_chunks_param *ch;
6732 if (!ep->auth_enable)
6735 if (len < sizeof(struct sctp_authchunks))
6738 if (copy_from_user(&val, optval, sizeof(val)))
6741 to = p->gauth_chunks;
6742 asoc = sctp_id2assoc(sk, val.gauth_assoc_id);
6746 ch = asoc->peer.peer_chunks;
6750 /* See if the user provided enough room for all the data */
6751 num_chunks = ntohs(ch->param_hdr.length) - sizeof(struct sctp_paramhdr);
6752 if (len < num_chunks)
6755 if (copy_to_user(to, ch->chunks, num_chunks))
6758 len = sizeof(struct sctp_authchunks) + num_chunks;
6759 if (put_user(len, optlen))
6761 if (put_user(num_chunks, &p->gauth_number_of_chunks))
6766 static int sctp_getsockopt_local_auth_chunks(struct sock *sk, int len,
6767 char __user *optval, int __user *optlen)
6769 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
6770 struct sctp_authchunks __user *p = (void __user *)optval;
6771 struct sctp_authchunks val;
6772 struct sctp_association *asoc;
6773 struct sctp_chunks_param *ch;
6777 if (!ep->auth_enable)
6780 if (len < sizeof(struct sctp_authchunks))
6783 if (copy_from_user(&val, optval, sizeof(val)))
6786 to = p->gauth_chunks;
6787 asoc = sctp_id2assoc(sk, val.gauth_assoc_id);
6788 if (!asoc && val.gauth_assoc_id != SCTP_FUTURE_ASSOC &&
6789 sctp_style(sk, UDP))
6792 ch = asoc ? (struct sctp_chunks_param *)asoc->c.auth_chunks
6793 : ep->auth_chunk_list;
6797 num_chunks = ntohs(ch->param_hdr.length) - sizeof(struct sctp_paramhdr);
6798 if (len < sizeof(struct sctp_authchunks) + num_chunks)
6801 if (copy_to_user(to, ch->chunks, num_chunks))
6804 len = sizeof(struct sctp_authchunks) + num_chunks;
6805 if (put_user(len, optlen))
6807 if (put_user(num_chunks, &p->gauth_number_of_chunks))
6814 * 8.2.5. Get the Current Number of Associations (SCTP_GET_ASSOC_NUMBER)
6815 * This option gets the current number of associations that are attached
6816 * to a one-to-many style socket. The option value is an uint32_t.
6818 static int sctp_getsockopt_assoc_number(struct sock *sk, int len,
6819 char __user *optval, int __user *optlen)
6821 struct sctp_sock *sp = sctp_sk(sk);
6822 struct sctp_association *asoc;
6825 if (sctp_style(sk, TCP))
6828 if (len < sizeof(u32))
6833 list_for_each_entry(asoc, &(sp->ep->asocs), asocs) {
6837 if (put_user(len, optlen))
6839 if (copy_to_user(optval, &val, len))
6846 * 8.1.23 SCTP_AUTO_ASCONF
6847 * See the corresponding setsockopt entry as description
6849 static int sctp_getsockopt_auto_asconf(struct sock *sk, int len,
6850 char __user *optval, int __user *optlen)
6854 if (len < sizeof(int))
6858 if (sctp_sk(sk)->do_auto_asconf && sctp_is_ep_boundall(sk))
6860 if (put_user(len, optlen))
6862 if (copy_to_user(optval, &val, len))
6868 * 8.2.6. Get the Current Identifiers of Associations
6869 * (SCTP_GET_ASSOC_ID_LIST)
6871 * This option gets the current list of SCTP association identifiers of
6872 * the SCTP associations handled by a one-to-many style socket.
6874 static int sctp_getsockopt_assoc_ids(struct sock *sk, int len,
6875 char __user *optval, int __user *optlen)
6877 struct sctp_sock *sp = sctp_sk(sk);
6878 struct sctp_association *asoc;
6879 struct sctp_assoc_ids *ids;
6882 if (sctp_style(sk, TCP))
6885 if (len < sizeof(struct sctp_assoc_ids))
6888 list_for_each_entry(asoc, &(sp->ep->asocs), asocs) {
6892 if (len < sizeof(struct sctp_assoc_ids) + sizeof(sctp_assoc_t) * num)
6895 len = sizeof(struct sctp_assoc_ids) + sizeof(sctp_assoc_t) * num;
6897 ids = kmalloc(len, GFP_USER | __GFP_NOWARN);
6901 ids->gaids_number_of_ids = num;
6903 list_for_each_entry(asoc, &(sp->ep->asocs), asocs) {
6904 ids->gaids_assoc_id[num++] = asoc->assoc_id;
6907 if (put_user(len, optlen) || copy_to_user(optval, ids, len)) {
6917 * SCTP_PEER_ADDR_THLDS
6919 * This option allows us to fetch the partially failed threshold for one or all
6920 * transports in an association. See Section 6.1 of:
6921 * http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txt
6923 static int sctp_getsockopt_paddr_thresholds(struct sock *sk,
6924 char __user *optval,
6928 struct sctp_paddrthlds val;
6929 struct sctp_transport *trans;
6930 struct sctp_association *asoc;
6932 if (len < sizeof(struct sctp_paddrthlds))
6934 len = sizeof(struct sctp_paddrthlds);
6935 if (copy_from_user(&val, (struct sctp_paddrthlds __user *)optval, len))
6938 if (!sctp_is_any(sk, (const union sctp_addr *)&val.spt_address)) {
6939 trans = sctp_addr_id2transport(sk, &val.spt_address,
6944 val.spt_pathmaxrxt = trans->pathmaxrxt;
6945 val.spt_pathpfthld = trans->pf_retrans;
6950 asoc = sctp_id2assoc(sk, val.spt_assoc_id);
6951 if (!asoc && val.spt_assoc_id != SCTP_FUTURE_ASSOC &&
6952 sctp_style(sk, UDP))
6956 val.spt_pathpfthld = asoc->pf_retrans;
6957 val.spt_pathmaxrxt = asoc->pathmaxrxt;
6959 struct sctp_sock *sp = sctp_sk(sk);
6961 val.spt_pathpfthld = sp->pf_retrans;
6962 val.spt_pathmaxrxt = sp->pathmaxrxt;
6965 if (put_user(len, optlen) || copy_to_user(optval, &val, len))
6972 * SCTP_GET_ASSOC_STATS
6974 * This option retrieves local per endpoint statistics. It is modeled
6975 * after OpenSolaris' implementation
6977 static int sctp_getsockopt_assoc_stats(struct sock *sk, int len,
6978 char __user *optval,
6981 struct sctp_assoc_stats sas;
6982 struct sctp_association *asoc = NULL;
6984 /* User must provide at least the assoc id */
6985 if (len < sizeof(sctp_assoc_t))
6988 /* Allow the struct to grow and fill in as much as possible */
6989 len = min_t(size_t, len, sizeof(sas));
6991 if (copy_from_user(&sas, optval, len))
6994 asoc = sctp_id2assoc(sk, sas.sas_assoc_id);
6998 sas.sas_rtxchunks = asoc->stats.rtxchunks;
6999 sas.sas_gapcnt = asoc->stats.gapcnt;
7000 sas.sas_outofseqtsns = asoc->stats.outofseqtsns;
7001 sas.sas_osacks = asoc->stats.osacks;
7002 sas.sas_isacks = asoc->stats.isacks;
7003 sas.sas_octrlchunks = asoc->stats.octrlchunks;
7004 sas.sas_ictrlchunks = asoc->stats.ictrlchunks;
7005 sas.sas_oodchunks = asoc->stats.oodchunks;
7006 sas.sas_iodchunks = asoc->stats.iodchunks;
7007 sas.sas_ouodchunks = asoc->stats.ouodchunks;
7008 sas.sas_iuodchunks = asoc->stats.iuodchunks;
7009 sas.sas_idupchunks = asoc->stats.idupchunks;
7010 sas.sas_opackets = asoc->stats.opackets;
7011 sas.sas_ipackets = asoc->stats.ipackets;
7013 /* New high max rto observed, will return 0 if not a single
7014 * RTO update took place. obs_rto_ipaddr will be bogus
7017 sas.sas_maxrto = asoc->stats.max_obs_rto;
7018 memcpy(&sas.sas_obs_rto_ipaddr, &asoc->stats.obs_rto_ipaddr,
7019 sizeof(struct sockaddr_storage));
7021 /* Mark beginning of a new observation period */
7022 asoc->stats.max_obs_rto = asoc->rto_min;
7024 if (put_user(len, optlen))
7027 pr_debug("%s: len:%d, assoc_id:%d\n", __func__, len, sas.sas_assoc_id);
7029 if (copy_to_user(optval, &sas, len))
7035 static int sctp_getsockopt_recvrcvinfo(struct sock *sk, int len,
7036 char __user *optval,
7041 if (len < sizeof(int))
7045 if (sctp_sk(sk)->recvrcvinfo)
7047 if (put_user(len, optlen))
7049 if (copy_to_user(optval, &val, len))
7055 static int sctp_getsockopt_recvnxtinfo(struct sock *sk, int len,
7056 char __user *optval,
7061 if (len < sizeof(int))
7065 if (sctp_sk(sk)->recvnxtinfo)
7067 if (put_user(len, optlen))
7069 if (copy_to_user(optval, &val, len))
7075 static int sctp_getsockopt_pr_supported(struct sock *sk, int len,
7076 char __user *optval,
7079 struct sctp_assoc_value params;
7080 struct sctp_association *asoc;
7081 int retval = -EFAULT;
7083 if (len < sizeof(params)) {
7088 len = sizeof(params);
7089 if (copy_from_user(¶ms, optval, len))
7092 asoc = sctp_id2assoc(sk, params.assoc_id);
7093 if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
7094 sctp_style(sk, UDP)) {
7099 params.assoc_value = asoc ? asoc->prsctp_enable
7100 : sctp_sk(sk)->ep->prsctp_enable;
7102 if (put_user(len, optlen))
7105 if (copy_to_user(optval, ¶ms, len))
7114 static int sctp_getsockopt_default_prinfo(struct sock *sk, int len,
7115 char __user *optval,
7118 struct sctp_default_prinfo info;
7119 struct sctp_association *asoc;
7120 int retval = -EFAULT;
7122 if (len < sizeof(info)) {
7128 if (copy_from_user(&info, optval, len))
7131 asoc = sctp_id2assoc(sk, info.pr_assoc_id);
7133 info.pr_policy = SCTP_PR_POLICY(asoc->default_flags);
7134 info.pr_value = asoc->default_timetolive;
7135 } else if (!info.pr_assoc_id) {
7136 struct sctp_sock *sp = sctp_sk(sk);
7138 info.pr_policy = SCTP_PR_POLICY(sp->default_flags);
7139 info.pr_value = sp->default_timetolive;
7145 if (put_user(len, optlen))
7148 if (copy_to_user(optval, &info, len))
7157 static int sctp_getsockopt_pr_assocstatus(struct sock *sk, int len,
7158 char __user *optval,
7161 struct sctp_prstatus params;
7162 struct sctp_association *asoc;
7164 int retval = -EINVAL;
7166 if (len < sizeof(params))
7169 len = sizeof(params);
7170 if (copy_from_user(¶ms, optval, len)) {
7175 policy = params.sprstat_policy;
7176 if (!policy || (policy & ~(SCTP_PR_SCTP_MASK | SCTP_PR_SCTP_ALL)) ||
7177 ((policy & SCTP_PR_SCTP_ALL) && (policy & SCTP_PR_SCTP_MASK)))
7180 asoc = sctp_id2assoc(sk, params.sprstat_assoc_id);
7184 if (policy == SCTP_PR_SCTP_ALL) {
7185 params.sprstat_abandoned_unsent = 0;
7186 params.sprstat_abandoned_sent = 0;
7187 for (policy = 0; policy <= SCTP_PR_INDEX(MAX); policy++) {
7188 params.sprstat_abandoned_unsent +=
7189 asoc->abandoned_unsent[policy];
7190 params.sprstat_abandoned_sent +=
7191 asoc->abandoned_sent[policy];
7194 params.sprstat_abandoned_unsent =
7195 asoc->abandoned_unsent[__SCTP_PR_INDEX(policy)];
7196 params.sprstat_abandoned_sent =
7197 asoc->abandoned_sent[__SCTP_PR_INDEX(policy)];
7200 if (put_user(len, optlen)) {
7205 if (copy_to_user(optval, ¶ms, len)) {
7216 static int sctp_getsockopt_pr_streamstatus(struct sock *sk, int len,
7217 char __user *optval,
7220 struct sctp_stream_out_ext *streamoute;
7221 struct sctp_association *asoc;
7222 struct sctp_prstatus params;
7223 int retval = -EINVAL;
7226 if (len < sizeof(params))
7229 len = sizeof(params);
7230 if (copy_from_user(¶ms, optval, len)) {
7235 policy = params.sprstat_policy;
7236 if (!policy || (policy & ~(SCTP_PR_SCTP_MASK | SCTP_PR_SCTP_ALL)) ||
7237 ((policy & SCTP_PR_SCTP_ALL) && (policy & SCTP_PR_SCTP_MASK)))
7240 asoc = sctp_id2assoc(sk, params.sprstat_assoc_id);
7241 if (!asoc || params.sprstat_sid >= asoc->stream.outcnt)
7244 streamoute = SCTP_SO(&asoc->stream, params.sprstat_sid)->ext;
7246 /* Not allocated yet, means all stats are 0 */
7247 params.sprstat_abandoned_unsent = 0;
7248 params.sprstat_abandoned_sent = 0;
7253 if (policy == SCTP_PR_SCTP_ALL) {
7254 params.sprstat_abandoned_unsent = 0;
7255 params.sprstat_abandoned_sent = 0;
7256 for (policy = 0; policy <= SCTP_PR_INDEX(MAX); policy++) {
7257 params.sprstat_abandoned_unsent +=
7258 streamoute->abandoned_unsent[policy];
7259 params.sprstat_abandoned_sent +=
7260 streamoute->abandoned_sent[policy];
7263 params.sprstat_abandoned_unsent =
7264 streamoute->abandoned_unsent[__SCTP_PR_INDEX(policy)];
7265 params.sprstat_abandoned_sent =
7266 streamoute->abandoned_sent[__SCTP_PR_INDEX(policy)];
7269 if (put_user(len, optlen) || copy_to_user(optval, ¶ms, len)) {
7280 static int sctp_getsockopt_reconfig_supported(struct sock *sk, int len,
7281 char __user *optval,
7284 struct sctp_assoc_value params;
7285 struct sctp_association *asoc;
7286 int retval = -EFAULT;
7288 if (len < sizeof(params)) {
7293 len = sizeof(params);
7294 if (copy_from_user(¶ms, optval, len))
7297 asoc = sctp_id2assoc(sk, params.assoc_id);
7299 params.assoc_value = asoc->reconf_enable;
7300 } else if (!params.assoc_id) {
7301 struct sctp_sock *sp = sctp_sk(sk);
7303 params.assoc_value = sp->ep->reconf_enable;
7309 if (put_user(len, optlen))
7312 if (copy_to_user(optval, ¶ms, len))
7321 static int sctp_getsockopt_enable_strreset(struct sock *sk, int len,
7322 char __user *optval,
7325 struct sctp_assoc_value params;
7326 struct sctp_association *asoc;
7327 int retval = -EFAULT;
7329 if (len < sizeof(params)) {
7334 len = sizeof(params);
7335 if (copy_from_user(¶ms, optval, len))
7338 asoc = sctp_id2assoc(sk, params.assoc_id);
7340 params.assoc_value = asoc->strreset_enable;
7341 } else if (!params.assoc_id) {
7342 struct sctp_sock *sp = sctp_sk(sk);
7344 params.assoc_value = sp->ep->strreset_enable;
7350 if (put_user(len, optlen))
7353 if (copy_to_user(optval, ¶ms, len))
7362 static int sctp_getsockopt_scheduler(struct sock *sk, int len,
7363 char __user *optval,
7366 struct sctp_assoc_value params;
7367 struct sctp_association *asoc;
7368 int retval = -EFAULT;
7370 if (len < sizeof(params)) {
7375 len = sizeof(params);
7376 if (copy_from_user(¶ms, optval, len))
7379 asoc = sctp_id2assoc(sk, params.assoc_id);
7385 params.assoc_value = sctp_sched_get_sched(asoc);
7387 if (put_user(len, optlen))
7390 if (copy_to_user(optval, ¶ms, len))
7399 static int sctp_getsockopt_scheduler_value(struct sock *sk, int len,
7400 char __user *optval,
7403 struct sctp_stream_value params;
7404 struct sctp_association *asoc;
7405 int retval = -EFAULT;
7407 if (len < sizeof(params)) {
7412 len = sizeof(params);
7413 if (copy_from_user(¶ms, optval, len))
7416 asoc = sctp_id2assoc(sk, params.assoc_id);
7422 retval = sctp_sched_get_value(asoc, params.stream_id,
7423 ¶ms.stream_value);
7427 if (put_user(len, optlen)) {
7432 if (copy_to_user(optval, ¶ms, len)) {
7441 static int sctp_getsockopt_interleaving_supported(struct sock *sk, int len,
7442 char __user *optval,
7445 struct sctp_assoc_value params;
7446 struct sctp_association *asoc;
7447 int retval = -EFAULT;
7449 if (len < sizeof(params)) {
7454 len = sizeof(params);
7455 if (copy_from_user(¶ms, optval, len))
7458 asoc = sctp_id2assoc(sk, params.assoc_id);
7460 params.assoc_value = asoc->intl_enable;
7461 } else if (!params.assoc_id) {
7462 struct sctp_sock *sp = sctp_sk(sk);
7464 params.assoc_value = sp->strm_interleave;
7470 if (put_user(len, optlen))
7473 if (copy_to_user(optval, ¶ms, len))
7482 static int sctp_getsockopt_reuse_port(struct sock *sk, int len,
7483 char __user *optval,
7488 if (len < sizeof(int))
7492 val = sctp_sk(sk)->reuse;
7493 if (put_user(len, optlen))
7496 if (copy_to_user(optval, &val, len))
7502 static int sctp_getsockopt_event(struct sock *sk, int len, char __user *optval,
7505 struct sctp_association *asoc;
7506 struct sctp_event param;
7509 if (len < sizeof(param))
7512 len = sizeof(param);
7513 if (copy_from_user(¶m, optval, len))
7516 if (param.se_type < SCTP_SN_TYPE_BASE ||
7517 param.se_type > SCTP_SN_TYPE_MAX)
7520 asoc = sctp_id2assoc(sk, param.se_assoc_id);
7521 subscribe = asoc ? asoc->subscribe : sctp_sk(sk)->subscribe;
7522 param.se_on = sctp_ulpevent_type_enabled(subscribe, param.se_type);
7524 if (put_user(len, optlen))
7527 if (copy_to_user(optval, ¶m, len))
7533 static int sctp_getsockopt(struct sock *sk, int level, int optname,
7534 char __user *optval, int __user *optlen)
7539 pr_debug("%s: sk:%p, optname:%d\n", __func__, sk, optname);
7541 /* I can hardly begin to describe how wrong this is. This is
7542 * so broken as to be worse than useless. The API draft
7543 * REALLY is NOT helpful here... I am not convinced that the
7544 * semantics of getsockopt() with a level OTHER THAN SOL_SCTP
7545 * are at all well-founded.
7547 if (level != SOL_SCTP) {
7548 struct sctp_af *af = sctp_sk(sk)->pf->af;
7550 retval = af->getsockopt(sk, level, optname, optval, optlen);
7554 if (get_user(len, optlen))
7564 retval = sctp_getsockopt_sctp_status(sk, len, optval, optlen);
7566 case SCTP_DISABLE_FRAGMENTS:
7567 retval = sctp_getsockopt_disable_fragments(sk, len, optval,
7571 retval = sctp_getsockopt_events(sk, len, optval, optlen);
7573 case SCTP_AUTOCLOSE:
7574 retval = sctp_getsockopt_autoclose(sk, len, optval, optlen);
7576 case SCTP_SOCKOPT_PEELOFF:
7577 retval = sctp_getsockopt_peeloff(sk, len, optval, optlen);
7579 case SCTP_SOCKOPT_PEELOFF_FLAGS:
7580 retval = sctp_getsockopt_peeloff_flags(sk, len, optval, optlen);
7582 case SCTP_PEER_ADDR_PARAMS:
7583 retval = sctp_getsockopt_peer_addr_params(sk, len, optval,
7586 case SCTP_DELAYED_SACK:
7587 retval = sctp_getsockopt_delayed_ack(sk, len, optval,
7591 retval = sctp_getsockopt_initmsg(sk, len, optval, optlen);
7593 case SCTP_GET_PEER_ADDRS:
7594 retval = sctp_getsockopt_peer_addrs(sk, len, optval,
7597 case SCTP_GET_LOCAL_ADDRS:
7598 retval = sctp_getsockopt_local_addrs(sk, len, optval,
7601 case SCTP_SOCKOPT_CONNECTX3:
7602 retval = sctp_getsockopt_connectx3(sk, len, optval, optlen);
7604 case SCTP_DEFAULT_SEND_PARAM:
7605 retval = sctp_getsockopt_default_send_param(sk, len,
7608 case SCTP_DEFAULT_SNDINFO:
7609 retval = sctp_getsockopt_default_sndinfo(sk, len,
7612 case SCTP_PRIMARY_ADDR:
7613 retval = sctp_getsockopt_primary_addr(sk, len, optval, optlen);
7616 retval = sctp_getsockopt_nodelay(sk, len, optval, optlen);
7619 retval = sctp_getsockopt_rtoinfo(sk, len, optval, optlen);
7621 case SCTP_ASSOCINFO:
7622 retval = sctp_getsockopt_associnfo(sk, len, optval, optlen);
7624 case SCTP_I_WANT_MAPPED_V4_ADDR:
7625 retval = sctp_getsockopt_mappedv4(sk, len, optval, optlen);
7628 retval = sctp_getsockopt_maxseg(sk, len, optval, optlen);
7630 case SCTP_GET_PEER_ADDR_INFO:
7631 retval = sctp_getsockopt_peer_addr_info(sk, len, optval,
7634 case SCTP_ADAPTATION_LAYER:
7635 retval = sctp_getsockopt_adaptation_layer(sk, len, optval,
7639 retval = sctp_getsockopt_context(sk, len, optval, optlen);
7641 case SCTP_FRAGMENT_INTERLEAVE:
7642 retval = sctp_getsockopt_fragment_interleave(sk, len, optval,
7645 case SCTP_PARTIAL_DELIVERY_POINT:
7646 retval = sctp_getsockopt_partial_delivery_point(sk, len, optval,
7649 case SCTP_MAX_BURST:
7650 retval = sctp_getsockopt_maxburst(sk, len, optval, optlen);
7653 case SCTP_AUTH_CHUNK:
7654 case SCTP_AUTH_DELETE_KEY:
7655 case SCTP_AUTH_DEACTIVATE_KEY:
7656 retval = -EOPNOTSUPP;
7658 case SCTP_HMAC_IDENT:
7659 retval = sctp_getsockopt_hmac_ident(sk, len, optval, optlen);
7661 case SCTP_AUTH_ACTIVE_KEY:
7662 retval = sctp_getsockopt_active_key(sk, len, optval, optlen);
7664 case SCTP_PEER_AUTH_CHUNKS:
7665 retval = sctp_getsockopt_peer_auth_chunks(sk, len, optval,
7668 case SCTP_LOCAL_AUTH_CHUNKS:
7669 retval = sctp_getsockopt_local_auth_chunks(sk, len, optval,
7672 case SCTP_GET_ASSOC_NUMBER:
7673 retval = sctp_getsockopt_assoc_number(sk, len, optval, optlen);
7675 case SCTP_GET_ASSOC_ID_LIST:
7676 retval = sctp_getsockopt_assoc_ids(sk, len, optval, optlen);
7678 case SCTP_AUTO_ASCONF:
7679 retval = sctp_getsockopt_auto_asconf(sk, len, optval, optlen);
7681 case SCTP_PEER_ADDR_THLDS:
7682 retval = sctp_getsockopt_paddr_thresholds(sk, optval, len, optlen);
7684 case SCTP_GET_ASSOC_STATS:
7685 retval = sctp_getsockopt_assoc_stats(sk, len, optval, optlen);
7687 case SCTP_RECVRCVINFO:
7688 retval = sctp_getsockopt_recvrcvinfo(sk, len, optval, optlen);
7690 case SCTP_RECVNXTINFO:
7691 retval = sctp_getsockopt_recvnxtinfo(sk, len, optval, optlen);
7693 case SCTP_PR_SUPPORTED:
7694 retval = sctp_getsockopt_pr_supported(sk, len, optval, optlen);
7696 case SCTP_DEFAULT_PRINFO:
7697 retval = sctp_getsockopt_default_prinfo(sk, len, optval,
7700 case SCTP_PR_ASSOC_STATUS:
7701 retval = sctp_getsockopt_pr_assocstatus(sk, len, optval,
7704 case SCTP_PR_STREAM_STATUS:
7705 retval = sctp_getsockopt_pr_streamstatus(sk, len, optval,
7708 case SCTP_RECONFIG_SUPPORTED:
7709 retval = sctp_getsockopt_reconfig_supported(sk, len, optval,
7712 case SCTP_ENABLE_STREAM_RESET:
7713 retval = sctp_getsockopt_enable_strreset(sk, len, optval,
7716 case SCTP_STREAM_SCHEDULER:
7717 retval = sctp_getsockopt_scheduler(sk, len, optval,
7720 case SCTP_STREAM_SCHEDULER_VALUE:
7721 retval = sctp_getsockopt_scheduler_value(sk, len, optval,
7724 case SCTP_INTERLEAVING_SUPPORTED:
7725 retval = sctp_getsockopt_interleaving_supported(sk, len, optval,
7728 case SCTP_REUSE_PORT:
7729 retval = sctp_getsockopt_reuse_port(sk, len, optval, optlen);
7732 retval = sctp_getsockopt_event(sk, len, optval, optlen);
7735 retval = -ENOPROTOOPT;
7743 static int sctp_hash(struct sock *sk)
7749 static void sctp_unhash(struct sock *sk)
7754 /* Check if port is acceptable. Possibly find first available port.
7756 * The port hash table (contained in the 'global' SCTP protocol storage
7757 * returned by struct sctp_protocol *sctp_get_protocol()). The hash
7758 * table is an array of 4096 lists (sctp_bind_hashbucket). Each
7759 * list (the list number is the port number hashed out, so as you
7760 * would expect from a hash function, all the ports in a given list have
7761 * such a number that hashes out to the same list number; you were
7762 * expecting that, right?); so each list has a set of ports, with a
7763 * link to the socket (struct sock) that uses it, the port number and
7764 * a fastreuse flag (FIXME: NPI ipg).
7766 static struct sctp_bind_bucket *sctp_bucket_create(
7767 struct sctp_bind_hashbucket *head, struct net *, unsigned short snum);
7769 static long sctp_get_port_local(struct sock *sk, union sctp_addr *addr)
7771 struct sctp_sock *sp = sctp_sk(sk);
7772 bool reuse = (sk->sk_reuse || sp->reuse);
7773 struct sctp_bind_hashbucket *head; /* hash list */
7774 kuid_t uid = sock_i_uid(sk);
7775 struct sctp_bind_bucket *pp;
7776 unsigned short snum;
7779 snum = ntohs(addr->v4.sin_port);
7781 pr_debug("%s: begins, snum:%d\n", __func__, snum);
7786 /* Search for an available port. */
7787 int low, high, remaining, index;
7789 struct net *net = sock_net(sk);
7791 inet_get_local_port_range(net, &low, &high);
7792 remaining = (high - low) + 1;
7793 rover = prandom_u32() % remaining + low;
7797 if ((rover < low) || (rover > high))
7799 if (inet_is_local_reserved_port(net, rover))
7801 index = sctp_phashfn(sock_net(sk), rover);
7802 head = &sctp_port_hashtable[index];
7803 spin_lock(&head->lock);
7804 sctp_for_each_hentry(pp, &head->chain)
7805 if ((pp->port == rover) &&
7806 net_eq(sock_net(sk), pp->net))
7810 spin_unlock(&head->lock);
7811 } while (--remaining > 0);
7813 /* Exhausted local port range during search? */
7818 /* OK, here is the one we will use. HEAD (the port
7819 * hash table list entry) is non-NULL and we hold it's
7824 /* We are given an specific port number; we verify
7825 * that it is not being used. If it is used, we will
7826 * exahust the search in the hash list corresponding
7827 * to the port number (snum) - we detect that with the
7828 * port iterator, pp being NULL.
7830 head = &sctp_port_hashtable[sctp_phashfn(sock_net(sk), snum)];
7831 spin_lock(&head->lock);
7832 sctp_for_each_hentry(pp, &head->chain) {
7833 if ((pp->port == snum) && net_eq(pp->net, sock_net(sk)))
7840 if (!hlist_empty(&pp->owner)) {
7841 /* We had a port hash table hit - there is an
7842 * available port (pp != NULL) and it is being
7843 * used by other socket (pp->owner not empty); that other
7844 * socket is going to be sk2.
7848 pr_debug("%s: found a possible match\n", __func__);
7850 if ((pp->fastreuse && reuse &&
7851 sk->sk_state != SCTP_SS_LISTENING) ||
7852 (pp->fastreuseport && sk->sk_reuseport &&
7853 uid_eq(pp->fastuid, uid)))
7856 /* Run through the list of sockets bound to the port
7857 * (pp->port) [via the pointers bind_next and
7858 * bind_pprev in the struct sock *sk2 (pp->sk)]. On each one,
7859 * we get the endpoint they describe and run through
7860 * the endpoint's list of IP (v4 or v6) addresses,
7861 * comparing each of the addresses with the address of
7862 * the socket sk. If we find a match, then that means
7863 * that this port/socket (sk) combination are already
7866 sk_for_each_bound(sk2, &pp->owner) {
7867 struct sctp_sock *sp2 = sctp_sk(sk2);
7868 struct sctp_endpoint *ep2 = sp2->ep;
7871 (reuse && (sk2->sk_reuse || sp2->reuse) &&
7872 sk2->sk_state != SCTP_SS_LISTENING) ||
7873 (sk->sk_reuseport && sk2->sk_reuseport &&
7874 uid_eq(uid, sock_i_uid(sk2))))
7877 if (sctp_bind_addr_conflict(&ep2->base.bind_addr,
7884 pr_debug("%s: found a match\n", __func__);
7887 /* If there was a hash table miss, create a new port. */
7889 if (!pp && !(pp = sctp_bucket_create(head, sock_net(sk), snum)))
7892 /* In either case (hit or miss), make sure fastreuse is 1 only
7893 * if sk->sk_reuse is too (that is, if the caller requested
7894 * SO_REUSEADDR on this socket -sk-).
7896 if (hlist_empty(&pp->owner)) {
7897 if (reuse && sk->sk_state != SCTP_SS_LISTENING)
7902 if (sk->sk_reuseport) {
7903 pp->fastreuseport = 1;
7906 pp->fastreuseport = 0;
7909 if (pp->fastreuse &&
7910 (!reuse || sk->sk_state == SCTP_SS_LISTENING))
7913 if (pp->fastreuseport &&
7914 (!sk->sk_reuseport || !uid_eq(pp->fastuid, uid)))
7915 pp->fastreuseport = 0;
7918 /* We are set, so fill up all the data in the hash table
7919 * entry, tie the socket list information with the rest of the
7920 * sockets FIXME: Blurry, NPI (ipg).
7923 if (!sp->bind_hash) {
7924 inet_sk(sk)->inet_num = snum;
7925 sk_add_bind_node(sk, &pp->owner);
7931 spin_unlock(&head->lock);
7938 /* Assign a 'snum' port to the socket. If snum == 0, an ephemeral
7939 * port is requested.
7941 static int sctp_get_port(struct sock *sk, unsigned short snum)
7943 union sctp_addr addr;
7944 struct sctp_af *af = sctp_sk(sk)->pf->af;
7946 /* Set up a dummy address struct from the sk. */
7947 af->from_sk(&addr, sk);
7948 addr.v4.sin_port = htons(snum);
7950 /* Note: sk->sk_num gets filled in if ephemeral port request. */
7951 return !!sctp_get_port_local(sk, &addr);
7955 * Move a socket to LISTENING state.
7957 static int sctp_listen_start(struct sock *sk, int backlog)
7959 struct sctp_sock *sp = sctp_sk(sk);
7960 struct sctp_endpoint *ep = sp->ep;
7961 struct crypto_shash *tfm = NULL;
7964 /* Allocate HMAC for generating cookie. */
7965 if (!sp->hmac && sp->sctp_hmac_alg) {
7966 sprintf(alg, "hmac(%s)", sp->sctp_hmac_alg);
7967 tfm = crypto_alloc_shash(alg, 0, 0);
7969 net_info_ratelimited("failed to load transform for %s: %ld\n",
7970 sp->sctp_hmac_alg, PTR_ERR(tfm));
7973 sctp_sk(sk)->hmac = tfm;
7977 * If a bind() or sctp_bindx() is not called prior to a listen()
7978 * call that allows new associations to be accepted, the system
7979 * picks an ephemeral port and will choose an address set equivalent
7980 * to binding with a wildcard address.
7982 * This is not currently spelled out in the SCTP sockets
7983 * extensions draft, but follows the practice as seen in TCP
7987 inet_sk_set_state(sk, SCTP_SS_LISTENING);
7988 if (!ep->base.bind_addr.port) {
7989 if (sctp_autobind(sk))
7992 if (sctp_get_port(sk, inet_sk(sk)->inet_num)) {
7993 inet_sk_set_state(sk, SCTP_SS_CLOSED);
7998 sk->sk_max_ack_backlog = backlog;
7999 return sctp_hash_endpoint(ep);
8003 * 4.1.3 / 5.1.3 listen()
8005 * By default, new associations are not accepted for UDP style sockets.
8006 * An application uses listen() to mark a socket as being able to
8007 * accept new associations.
8009 * On TCP style sockets, applications use listen() to ready the SCTP
8010 * endpoint for accepting inbound associations.
8012 * On both types of endpoints a backlog of '0' disables listening.
8014 * Move a socket to LISTENING state.
8016 int sctp_inet_listen(struct socket *sock, int backlog)
8018 struct sock *sk = sock->sk;
8019 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
8022 if (unlikely(backlog < 0))
8027 /* Peeled-off sockets are not allowed to listen(). */
8028 if (sctp_style(sk, UDP_HIGH_BANDWIDTH))
8031 if (sock->state != SS_UNCONNECTED)
8034 if (!sctp_sstate(sk, LISTENING) && !sctp_sstate(sk, CLOSED))
8037 /* If backlog is zero, disable listening. */
8039 if (sctp_sstate(sk, CLOSED))
8043 sctp_unhash_endpoint(ep);
8044 sk->sk_state = SCTP_SS_CLOSED;
8045 if (sk->sk_reuse || sctp_sk(sk)->reuse)
8046 sctp_sk(sk)->bind_hash->fastreuse = 1;
8050 /* If we are already listening, just update the backlog */
8051 if (sctp_sstate(sk, LISTENING))
8052 sk->sk_max_ack_backlog = backlog;
8054 err = sctp_listen_start(sk, backlog);
8066 * This function is done by modeling the current datagram_poll() and the
8067 * tcp_poll(). Note that, based on these implementations, we don't
8068 * lock the socket in this function, even though it seems that,
8069 * ideally, locking or some other mechanisms can be used to ensure
8070 * the integrity of the counters (sndbuf and wmem_alloc) used
8071 * in this place. We assume that we don't need locks either until proven
8074 * Another thing to note is that we include the Async I/O support
8075 * here, again, by modeling the current TCP/UDP code. We don't have
8076 * a good way to test with it yet.
8078 __poll_t sctp_poll(struct file *file, struct socket *sock, poll_table *wait)
8080 struct sock *sk = sock->sk;
8081 struct sctp_sock *sp = sctp_sk(sk);
8084 poll_wait(file, sk_sleep(sk), wait);
8086 sock_rps_record_flow(sk);
8088 /* A TCP-style listening socket becomes readable when the accept queue
8091 if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))
8092 return (!list_empty(&sp->ep->asocs)) ?
8093 (EPOLLIN | EPOLLRDNORM) : 0;
8097 /* Is there any exceptional events? */
8098 if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue))
8100 (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? EPOLLPRI : 0);
8101 if (sk->sk_shutdown & RCV_SHUTDOWN)
8102 mask |= EPOLLRDHUP | EPOLLIN | EPOLLRDNORM;
8103 if (sk->sk_shutdown == SHUTDOWN_MASK)
8106 /* Is it readable? Reconsider this code with TCP-style support. */
8107 if (!skb_queue_empty(&sk->sk_receive_queue))
8108 mask |= EPOLLIN | EPOLLRDNORM;
8110 /* The association is either gone or not ready. */
8111 if (!sctp_style(sk, UDP) && sctp_sstate(sk, CLOSED))
8114 /* Is it writable? */
8115 if (sctp_writeable(sk)) {
8116 mask |= EPOLLOUT | EPOLLWRNORM;
8118 sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk);
8120 * Since the socket is not locked, the buffer
8121 * might be made available after the writeable check and
8122 * before the bit is set. This could cause a lost I/O
8123 * signal. tcp_poll() has a race breaker for this race
8124 * condition. Based on their implementation, we put
8125 * in the following code to cover it as well.
8127 if (sctp_writeable(sk))
8128 mask |= EPOLLOUT | EPOLLWRNORM;
8133 /********************************************************************
8134 * 2nd Level Abstractions
8135 ********************************************************************/
8137 static struct sctp_bind_bucket *sctp_bucket_create(
8138 struct sctp_bind_hashbucket *head, struct net *net, unsigned short snum)
8140 struct sctp_bind_bucket *pp;
8142 pp = kmem_cache_alloc(sctp_bucket_cachep, GFP_ATOMIC);
8144 SCTP_DBG_OBJCNT_INC(bind_bucket);
8147 INIT_HLIST_HEAD(&pp->owner);
8149 hlist_add_head(&pp->node, &head->chain);
8154 /* Caller must hold hashbucket lock for this tb with local BH disabled */
8155 static void sctp_bucket_destroy(struct sctp_bind_bucket *pp)
8157 if (pp && hlist_empty(&pp->owner)) {
8158 __hlist_del(&pp->node);
8159 kmem_cache_free(sctp_bucket_cachep, pp);
8160 SCTP_DBG_OBJCNT_DEC(bind_bucket);
8164 /* Release this socket's reference to a local port. */
8165 static inline void __sctp_put_port(struct sock *sk)
8167 struct sctp_bind_hashbucket *head =
8168 &sctp_port_hashtable[sctp_phashfn(sock_net(sk),
8169 inet_sk(sk)->inet_num)];
8170 struct sctp_bind_bucket *pp;
8172 spin_lock(&head->lock);
8173 pp = sctp_sk(sk)->bind_hash;
8174 __sk_del_bind_node(sk);
8175 sctp_sk(sk)->bind_hash = NULL;
8176 inet_sk(sk)->inet_num = 0;
8177 sctp_bucket_destroy(pp);
8178 spin_unlock(&head->lock);
8181 void sctp_put_port(struct sock *sk)
8184 __sctp_put_port(sk);
8189 * The system picks an ephemeral port and choose an address set equivalent
8190 * to binding with a wildcard address.
8191 * One of those addresses will be the primary address for the association.
8192 * This automatically enables the multihoming capability of SCTP.
8194 static int sctp_autobind(struct sock *sk)
8196 union sctp_addr autoaddr;
8200 /* Initialize a local sockaddr structure to INADDR_ANY. */
8201 af = sctp_sk(sk)->pf->af;
8203 port = htons(inet_sk(sk)->inet_num);
8204 af->inaddr_any(&autoaddr, port);
8206 return sctp_do_bind(sk, &autoaddr, af->sockaddr_len);
8209 /* Parse out IPPROTO_SCTP CMSG headers. Perform only minimal validation.
8212 * 4.2 The cmsghdr Structure *
8214 * When ancillary data is sent or received, any number of ancillary data
8215 * objects can be specified by the msg_control and msg_controllen members of
8216 * the msghdr structure, because each object is preceded by
8217 * a cmsghdr structure defining the object's length (the cmsg_len member).
8218 * Historically Berkeley-derived implementations have passed only one object
8219 * at a time, but this API allows multiple objects to be
8220 * passed in a single call to sendmsg() or recvmsg(). The following example
8221 * shows two ancillary data objects in a control buffer.
8223 * |<--------------------------- msg_controllen -------------------------->|
8226 * |<----- ancillary data object ----->|<----- ancillary data object ----->|
8228 * |<---------- CMSG_SPACE() --------->|<---------- CMSG_SPACE() --------->|
8231 * |<---------- cmsg_len ---------->| |<--------- cmsg_len ----------->| |
8233 * |<--------- CMSG_LEN() --------->| |<-------- CMSG_LEN() ---------->| |
8236 * +-----+-----+-----+--+-----------+--+-----+-----+-----+--+-----------+--+
8237 * |cmsg_|cmsg_|cmsg_|XX| |XX|cmsg_|cmsg_|cmsg_|XX| |XX|
8239 * |len |level|type |XX|cmsg_data[]|XX|len |level|type |XX|cmsg_data[]|XX|
8241 * +-----+-----+-----+--+-----------+--+-----+-----+-----+--+-----------+--+
8248 static int sctp_msghdr_parse(const struct msghdr *msg, struct sctp_cmsgs *cmsgs)
8250 struct msghdr *my_msg = (struct msghdr *)msg;
8251 struct cmsghdr *cmsg;
8253 for_each_cmsghdr(cmsg, my_msg) {
8254 if (!CMSG_OK(my_msg, cmsg))
8257 /* Should we parse this header or ignore? */
8258 if (cmsg->cmsg_level != IPPROTO_SCTP)
8261 /* Strictly check lengths following example in SCM code. */
8262 switch (cmsg->cmsg_type) {
8264 /* SCTP Socket API Extension
8265 * 5.3.1 SCTP Initiation Structure (SCTP_INIT)
8267 * This cmsghdr structure provides information for
8268 * initializing new SCTP associations with sendmsg().
8269 * The SCTP_INITMSG socket option uses this same data
8270 * structure. This structure is not used for
8273 * cmsg_level cmsg_type cmsg_data[]
8274 * ------------ ------------ ----------------------
8275 * IPPROTO_SCTP SCTP_INIT struct sctp_initmsg
8277 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_initmsg)))
8280 cmsgs->init = CMSG_DATA(cmsg);
8284 /* SCTP Socket API Extension
8285 * 5.3.2 SCTP Header Information Structure(SCTP_SNDRCV)
8287 * This cmsghdr structure specifies SCTP options for
8288 * sendmsg() and describes SCTP header information
8289 * about a received message through recvmsg().
8291 * cmsg_level cmsg_type cmsg_data[]
8292 * ------------ ------------ ----------------------
8293 * IPPROTO_SCTP SCTP_SNDRCV struct sctp_sndrcvinfo
8295 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_sndrcvinfo)))
8298 cmsgs->srinfo = CMSG_DATA(cmsg);
8300 if (cmsgs->srinfo->sinfo_flags &
8301 ~(SCTP_UNORDERED | SCTP_ADDR_OVER |
8302 SCTP_SACK_IMMEDIATELY | SCTP_SENDALL |
8303 SCTP_PR_SCTP_MASK | SCTP_ABORT | SCTP_EOF))
8308 /* SCTP Socket API Extension
8309 * 5.3.4 SCTP Send Information Structure (SCTP_SNDINFO)
8311 * This cmsghdr structure specifies SCTP options for
8312 * sendmsg(). This structure and SCTP_RCVINFO replaces
8313 * SCTP_SNDRCV which has been deprecated.
8315 * cmsg_level cmsg_type cmsg_data[]
8316 * ------------ ------------ ---------------------
8317 * IPPROTO_SCTP SCTP_SNDINFO struct sctp_sndinfo
8319 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_sndinfo)))
8322 cmsgs->sinfo = CMSG_DATA(cmsg);
8324 if (cmsgs->sinfo->snd_flags &
8325 ~(SCTP_UNORDERED | SCTP_ADDR_OVER |
8326 SCTP_SACK_IMMEDIATELY | SCTP_SENDALL |
8327 SCTP_PR_SCTP_MASK | SCTP_ABORT | SCTP_EOF))
8331 /* SCTP Socket API Extension
8332 * 5.3.7 SCTP PR-SCTP Information Structure (SCTP_PRINFO)
8334 * This cmsghdr structure specifies SCTP options for sendmsg().
8336 * cmsg_level cmsg_type cmsg_data[]
8337 * ------------ ------------ ---------------------
8338 * IPPROTO_SCTP SCTP_PRINFO struct sctp_prinfo
8340 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_prinfo)))
8343 cmsgs->prinfo = CMSG_DATA(cmsg);
8344 if (cmsgs->prinfo->pr_policy & ~SCTP_PR_SCTP_MASK)
8347 if (cmsgs->prinfo->pr_policy == SCTP_PR_SCTP_NONE)
8348 cmsgs->prinfo->pr_value = 0;
8351 /* SCTP Socket API Extension
8352 * 5.3.8 SCTP AUTH Information Structure (SCTP_AUTHINFO)
8354 * This cmsghdr structure specifies SCTP options for sendmsg().
8356 * cmsg_level cmsg_type cmsg_data[]
8357 * ------------ ------------ ---------------------
8358 * IPPROTO_SCTP SCTP_AUTHINFO struct sctp_authinfo
8360 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_authinfo)))
8363 cmsgs->authinfo = CMSG_DATA(cmsg);
8365 case SCTP_DSTADDRV4:
8366 case SCTP_DSTADDRV6:
8367 /* SCTP Socket API Extension
8368 * 5.3.9/10 SCTP Destination IPv4/6 Address Structure (SCTP_DSTADDRV4/6)
8370 * This cmsghdr structure specifies SCTP options for sendmsg().
8372 * cmsg_level cmsg_type cmsg_data[]
8373 * ------------ ------------ ---------------------
8374 * IPPROTO_SCTP SCTP_DSTADDRV4 struct in_addr
8375 * ------------ ------------ ---------------------
8376 * IPPROTO_SCTP SCTP_DSTADDRV6 struct in6_addr
8378 cmsgs->addrs_msg = my_msg;
8389 * Wait for a packet..
8390 * Note: This function is the same function as in core/datagram.c
8391 * with a few modifications to make lksctp work.
8393 static int sctp_wait_for_packet(struct sock *sk, int *err, long *timeo_p)
8398 prepare_to_wait_exclusive(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
8400 /* Socket errors? */
8401 error = sock_error(sk);
8405 if (!skb_queue_empty(&sk->sk_receive_queue))
8408 /* Socket shut down? */
8409 if (sk->sk_shutdown & RCV_SHUTDOWN)
8412 /* Sequenced packets can come disconnected. If so we report the
8417 /* Is there a good reason to think that we may receive some data? */
8418 if (list_empty(&sctp_sk(sk)->ep->asocs) && !sctp_sstate(sk, LISTENING))
8421 /* Handle signals. */
8422 if (signal_pending(current))
8425 /* Let another process have a go. Since we are going to sleep
8426 * anyway. Note: This may cause odd behaviors if the message
8427 * does not fit in the user's buffer, but this seems to be the
8428 * only way to honor MSG_DONTWAIT realistically.
8431 *timeo_p = schedule_timeout(*timeo_p);
8435 finish_wait(sk_sleep(sk), &wait);
8439 error = sock_intr_errno(*timeo_p);
8442 finish_wait(sk_sleep(sk), &wait);
8447 /* Receive a datagram.
8448 * Note: This is pretty much the same routine as in core/datagram.c
8449 * with a few changes to make lksctp work.
8451 struct sk_buff *sctp_skb_recv_datagram(struct sock *sk, int flags,
8452 int noblock, int *err)
8455 struct sk_buff *skb;
8458 timeo = sock_rcvtimeo(sk, noblock);
8460 pr_debug("%s: timeo:%ld, max:%ld\n", __func__, timeo,
8461 MAX_SCHEDULE_TIMEOUT);
8464 /* Again only user level code calls this function,
8465 * so nothing interrupt level
8466 * will suddenly eat the receive_queue.
8468 * Look at current nfs client by the way...
8469 * However, this function was correct in any case. 8)
8471 if (flags & MSG_PEEK) {
8472 skb = skb_peek(&sk->sk_receive_queue);
8474 refcount_inc(&skb->users);
8476 skb = __skb_dequeue(&sk->sk_receive_queue);
8482 /* Caller is allowed not to check sk->sk_err before calling. */
8483 error = sock_error(sk);
8487 if (sk->sk_shutdown & RCV_SHUTDOWN)
8490 if (sk_can_busy_loop(sk)) {
8491 sk_busy_loop(sk, noblock);
8493 if (!skb_queue_empty(&sk->sk_receive_queue))
8497 /* User doesn't want to wait. */
8501 } while (sctp_wait_for_packet(sk, err, &timeo) == 0);
8510 /* If sndbuf has changed, wake up per association sndbuf waiters. */
8511 static void __sctp_write_space(struct sctp_association *asoc)
8513 struct sock *sk = asoc->base.sk;
8515 if (sctp_wspace(asoc) <= 0)
8518 if (waitqueue_active(&asoc->wait))
8519 wake_up_interruptible(&asoc->wait);
8521 if (sctp_writeable(sk)) {
8522 struct socket_wq *wq;
8525 wq = rcu_dereference(sk->sk_wq);
8527 if (waitqueue_active(&wq->wait))
8528 wake_up_interruptible(&wq->wait);
8530 /* Note that we try to include the Async I/O support
8531 * here by modeling from the current TCP/UDP code.
8532 * We have not tested with it yet.
8534 if (!(sk->sk_shutdown & SEND_SHUTDOWN))
8535 sock_wake_async(wq, SOCK_WAKE_SPACE, POLL_OUT);
8541 static void sctp_wake_up_waiters(struct sock *sk,
8542 struct sctp_association *asoc)
8544 struct sctp_association *tmp = asoc;
8546 /* We do accounting for the sndbuf space per association,
8547 * so we only need to wake our own association.
8549 if (asoc->ep->sndbuf_policy)
8550 return __sctp_write_space(asoc);
8552 /* If association goes down and is just flushing its
8553 * outq, then just normally notify others.
8555 if (asoc->base.dead)
8556 return sctp_write_space(sk);
8558 /* Accounting for the sndbuf space is per socket, so we
8559 * need to wake up others, try to be fair and in case of
8560 * other associations, let them have a go first instead
8561 * of just doing a sctp_write_space() call.
8563 * Note that we reach sctp_wake_up_waiters() only when
8564 * associations free up queued chunks, thus we are under
8565 * lock and the list of associations on a socket is
8566 * guaranteed not to change.
8568 for (tmp = list_next_entry(tmp, asocs); 1;
8569 tmp = list_next_entry(tmp, asocs)) {
8570 /* Manually skip the head element. */
8571 if (&tmp->asocs == &((sctp_sk(sk))->ep->asocs))
8573 /* Wake up association. */
8574 __sctp_write_space(tmp);
8575 /* We've reached the end. */
8581 /* Do accounting for the sndbuf space.
8582 * Decrement the used sndbuf space of the corresponding association by the
8583 * data size which was just transmitted(freed).
8585 static void sctp_wfree(struct sk_buff *skb)
8587 struct sctp_chunk *chunk = skb_shinfo(skb)->destructor_arg;
8588 struct sctp_association *asoc = chunk->asoc;
8589 struct sock *sk = asoc->base.sk;
8591 sk_mem_uncharge(sk, skb->truesize);
8592 sk->sk_wmem_queued -= skb->truesize + sizeof(struct sctp_chunk);
8593 asoc->sndbuf_used -= skb->truesize + sizeof(struct sctp_chunk);
8594 WARN_ON(refcount_sub_and_test(sizeof(struct sctp_chunk),
8595 &sk->sk_wmem_alloc));
8598 struct sctp_shared_key *shkey = chunk->shkey;
8600 /* refcnt == 2 and !list_empty mean after this release, it's
8601 * not being used anywhere, and it's time to notify userland
8602 * that this shkey can be freed if it's been deactivated.
8604 if (shkey->deactivated && !list_empty(&shkey->key_list) &&
8605 refcount_read(&shkey->refcnt) == 2) {
8606 struct sctp_ulpevent *ev;
8608 ev = sctp_ulpevent_make_authkey(asoc, shkey->key_id,
8612 asoc->stream.si->enqueue_event(&asoc->ulpq, ev);
8614 sctp_auth_shkey_release(chunk->shkey);
8618 sctp_wake_up_waiters(sk, asoc);
8620 sctp_association_put(asoc);
8623 /* Do accounting for the receive space on the socket.
8624 * Accounting for the association is done in ulpevent.c
8625 * We set this as a destructor for the cloned data skbs so that
8626 * accounting is done at the correct time.
8628 void sctp_sock_rfree(struct sk_buff *skb)
8630 struct sock *sk = skb->sk;
8631 struct sctp_ulpevent *event = sctp_skb2event(skb);
8633 atomic_sub(event->rmem_len, &sk->sk_rmem_alloc);
8636 * Mimic the behavior of sock_rfree
8638 sk_mem_uncharge(sk, event->rmem_len);
8642 /* Helper function to wait for space in the sndbuf. */
8643 static int sctp_wait_for_sndbuf(struct sctp_association *asoc, long *timeo_p,
8646 struct sock *sk = asoc->base.sk;
8647 long current_timeo = *timeo_p;
8651 pr_debug("%s: asoc:%p, timeo:%ld, msg_len:%zu\n", __func__, asoc,
8654 /* Increment the association's refcnt. */
8655 sctp_association_hold(asoc);
8657 /* Wait on the association specific sndbuf space. */
8659 prepare_to_wait_exclusive(&asoc->wait, &wait,
8660 TASK_INTERRUPTIBLE);
8661 if (asoc->base.dead)
8665 if (sk->sk_err || asoc->state >= SCTP_STATE_SHUTDOWN_PENDING)
8667 if (signal_pending(current))
8668 goto do_interrupted;
8669 if ((int)msg_len <= sctp_wspace(asoc))
8672 /* Let another process have a go. Since we are going
8676 current_timeo = schedule_timeout(current_timeo);
8678 if (sk != asoc->base.sk)
8681 *timeo_p = current_timeo;
8685 finish_wait(&asoc->wait, &wait);
8687 /* Release the association's refcnt. */
8688 sctp_association_put(asoc);
8701 err = sock_intr_errno(*timeo_p);
8709 void sctp_data_ready(struct sock *sk)
8711 struct socket_wq *wq;
8714 wq = rcu_dereference(sk->sk_wq);
8715 if (skwq_has_sleeper(wq))
8716 wake_up_interruptible_sync_poll(&wq->wait, EPOLLIN |
8717 EPOLLRDNORM | EPOLLRDBAND);
8718 sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_IN);
8722 /* If socket sndbuf has changed, wake up all per association waiters. */
8723 void sctp_write_space(struct sock *sk)
8725 struct sctp_association *asoc;
8727 /* Wake up the tasks in each wait queue. */
8728 list_for_each_entry(asoc, &((sctp_sk(sk))->ep->asocs), asocs) {
8729 __sctp_write_space(asoc);
8733 /* Is there any sndbuf space available on the socket?
8735 * Note that sk_wmem_alloc is the sum of the send buffers on all of the
8736 * associations on the same socket. For a UDP-style socket with
8737 * multiple associations, it is possible for it to be "unwriteable"
8738 * prematurely. I assume that this is acceptable because
8739 * a premature "unwriteable" is better than an accidental "writeable" which
8740 * would cause an unwanted block under certain circumstances. For the 1-1
8741 * UDP-style sockets or TCP-style sockets, this code should work.
8744 static bool sctp_writeable(struct sock *sk)
8746 return sk->sk_sndbuf > sk->sk_wmem_queued;
8749 /* Wait for an association to go into ESTABLISHED state. If timeout is 0,
8750 * returns immediately with EINPROGRESS.
8752 static int sctp_wait_for_connect(struct sctp_association *asoc, long *timeo_p)
8754 struct sock *sk = asoc->base.sk;
8756 long current_timeo = *timeo_p;
8759 pr_debug("%s: asoc:%p, timeo:%ld\n", __func__, asoc, *timeo_p);
8761 /* Increment the association's refcnt. */
8762 sctp_association_hold(asoc);
8765 prepare_to_wait_exclusive(&asoc->wait, &wait,
8766 TASK_INTERRUPTIBLE);
8769 if (sk->sk_shutdown & RCV_SHUTDOWN)
8771 if (sk->sk_err || asoc->state >= SCTP_STATE_SHUTDOWN_PENDING ||
8774 if (signal_pending(current))
8775 goto do_interrupted;
8777 if (sctp_state(asoc, ESTABLISHED))
8780 /* Let another process have a go. Since we are going
8784 current_timeo = schedule_timeout(current_timeo);
8787 *timeo_p = current_timeo;
8791 finish_wait(&asoc->wait, &wait);
8793 /* Release the association's refcnt. */
8794 sctp_association_put(asoc);
8799 if (asoc->init_err_counter + 1 > asoc->max_init_attempts)
8802 err = -ECONNREFUSED;
8806 err = sock_intr_errno(*timeo_p);
8814 static int sctp_wait_for_accept(struct sock *sk, long timeo)
8816 struct sctp_endpoint *ep;
8820 ep = sctp_sk(sk)->ep;
8824 prepare_to_wait_exclusive(sk_sleep(sk), &wait,
8825 TASK_INTERRUPTIBLE);
8827 if (list_empty(&ep->asocs)) {
8829 timeo = schedule_timeout(timeo);
8834 if (!sctp_sstate(sk, LISTENING))
8838 if (!list_empty(&ep->asocs))
8841 err = sock_intr_errno(timeo);
8842 if (signal_pending(current))
8850 finish_wait(sk_sleep(sk), &wait);
8855 static void sctp_wait_for_close(struct sock *sk, long timeout)
8860 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
8861 if (list_empty(&sctp_sk(sk)->ep->asocs))
8864 timeout = schedule_timeout(timeout);
8866 } while (!signal_pending(current) && timeout);
8868 finish_wait(sk_sleep(sk), &wait);
8871 static void sctp_skb_set_owner_r_frag(struct sk_buff *skb, struct sock *sk)
8873 struct sk_buff *frag;
8878 /* Don't forget the fragments. */
8879 skb_walk_frags(skb, frag)
8880 sctp_skb_set_owner_r_frag(frag, sk);
8883 sctp_skb_set_owner_r(skb, sk);
8886 void sctp_copy_sock(struct sock *newsk, struct sock *sk,
8887 struct sctp_association *asoc)
8889 struct inet_sock *inet = inet_sk(sk);
8890 struct inet_sock *newinet;
8891 struct sctp_sock *sp = sctp_sk(sk);
8892 struct sctp_endpoint *ep = sp->ep;
8894 newsk->sk_type = sk->sk_type;
8895 newsk->sk_bound_dev_if = sk->sk_bound_dev_if;
8896 newsk->sk_flags = sk->sk_flags;
8897 newsk->sk_tsflags = sk->sk_tsflags;
8898 newsk->sk_no_check_tx = sk->sk_no_check_tx;
8899 newsk->sk_no_check_rx = sk->sk_no_check_rx;
8900 newsk->sk_reuse = sk->sk_reuse;
8901 sctp_sk(newsk)->reuse = sp->reuse;
8903 newsk->sk_shutdown = sk->sk_shutdown;
8904 newsk->sk_destruct = sctp_destruct_sock;
8905 newsk->sk_family = sk->sk_family;
8906 newsk->sk_protocol = IPPROTO_SCTP;
8907 newsk->sk_backlog_rcv = sk->sk_prot->backlog_rcv;
8908 newsk->sk_sndbuf = sk->sk_sndbuf;
8909 newsk->sk_rcvbuf = sk->sk_rcvbuf;
8910 newsk->sk_lingertime = sk->sk_lingertime;
8911 newsk->sk_rcvtimeo = sk->sk_rcvtimeo;
8912 newsk->sk_sndtimeo = sk->sk_sndtimeo;
8913 newsk->sk_rxhash = sk->sk_rxhash;
8915 newinet = inet_sk(newsk);
8917 /* Initialize sk's sport, dport, rcv_saddr and daddr for
8918 * getsockname() and getpeername()
8920 newinet->inet_sport = inet->inet_sport;
8921 newinet->inet_saddr = inet->inet_saddr;
8922 newinet->inet_rcv_saddr = inet->inet_rcv_saddr;
8923 newinet->inet_dport = htons(asoc->peer.port);
8924 newinet->pmtudisc = inet->pmtudisc;
8925 newinet->inet_id = asoc->next_tsn ^ jiffies;
8927 newinet->uc_ttl = inet->uc_ttl;
8928 newinet->mc_loop = 1;
8929 newinet->mc_ttl = 1;
8930 newinet->mc_index = 0;
8931 newinet->mc_list = NULL;
8933 if (newsk->sk_flags & SK_FLAGS_TIMESTAMP)
8934 net_enable_timestamp();
8936 /* Set newsk security attributes from orginal sk and connection
8937 * security attribute from ep.
8939 security_sctp_sk_clone(ep, sk, newsk);
8942 static inline void sctp_copy_descendant(struct sock *sk_to,
8943 const struct sock *sk_from)
8945 int ancestor_size = sizeof(struct inet_sock) +
8946 sizeof(struct sctp_sock) -
8947 offsetof(struct sctp_sock, auto_asconf_list);
8949 if (sk_from->sk_family == PF_INET6)
8950 ancestor_size += sizeof(struct ipv6_pinfo);
8952 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
8955 /* Populate the fields of the newsk from the oldsk and migrate the assoc
8956 * and its messages to the newsk.
8958 static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
8959 struct sctp_association *assoc,
8960 enum sctp_socket_type type)
8962 struct sctp_sock *oldsp = sctp_sk(oldsk);
8963 struct sctp_sock *newsp = sctp_sk(newsk);
8964 struct sctp_bind_bucket *pp; /* hash list port iterator */
8965 struct sctp_endpoint *newep = newsp->ep;
8966 struct sk_buff *skb, *tmp;
8967 struct sctp_ulpevent *event;
8968 struct sctp_bind_hashbucket *head;
8970 /* Migrate socket buffer sizes and all the socket level options to the
8973 newsk->sk_sndbuf = oldsk->sk_sndbuf;
8974 newsk->sk_rcvbuf = oldsk->sk_rcvbuf;
8975 /* Brute force copy old sctp opt. */
8976 sctp_copy_descendant(newsk, oldsk);
8978 /* Restore the ep value that was overwritten with the above structure
8984 /* Hook this new socket in to the bind_hash list. */
8985 head = &sctp_port_hashtable[sctp_phashfn(sock_net(oldsk),
8986 inet_sk(oldsk)->inet_num)];
8987 spin_lock_bh(&head->lock);
8988 pp = sctp_sk(oldsk)->bind_hash;
8989 sk_add_bind_node(newsk, &pp->owner);
8990 sctp_sk(newsk)->bind_hash = pp;
8991 inet_sk(newsk)->inet_num = inet_sk(oldsk)->inet_num;
8992 spin_unlock_bh(&head->lock);
8994 /* Copy the bind_addr list from the original endpoint to the new
8995 * endpoint so that we can handle restarts properly
8997 sctp_bind_addr_dup(&newsp->ep->base.bind_addr,
8998 &oldsp->ep->base.bind_addr, GFP_KERNEL);
9000 /* Move any messages in the old socket's receive queue that are for the
9001 * peeled off association to the new socket's receive queue.
9003 sctp_skb_for_each(skb, &oldsk->sk_receive_queue, tmp) {
9004 event = sctp_skb2event(skb);
9005 if (event->asoc == assoc) {
9006 __skb_unlink(skb, &oldsk->sk_receive_queue);
9007 __skb_queue_tail(&newsk->sk_receive_queue, skb);
9008 sctp_skb_set_owner_r_frag(skb, newsk);
9012 /* Clean up any messages pending delivery due to partial
9013 * delivery. Three cases:
9014 * 1) No partial deliver; no work.
9015 * 2) Peeling off partial delivery; keep pd_lobby in new pd_lobby.
9016 * 3) Peeling off non-partial delivery; move pd_lobby to receive_queue.
9018 skb_queue_head_init(&newsp->pd_lobby);
9019 atomic_set(&sctp_sk(newsk)->pd_mode, assoc->ulpq.pd_mode);
9021 if (atomic_read(&sctp_sk(oldsk)->pd_mode)) {
9022 struct sk_buff_head *queue;
9024 /* Decide which queue to move pd_lobby skbs to. */
9025 if (assoc->ulpq.pd_mode) {
9026 queue = &newsp->pd_lobby;
9028 queue = &newsk->sk_receive_queue;
9030 /* Walk through the pd_lobby, looking for skbs that
9031 * need moved to the new socket.
9033 sctp_skb_for_each(skb, &oldsp->pd_lobby, tmp) {
9034 event = sctp_skb2event(skb);
9035 if (event->asoc == assoc) {
9036 __skb_unlink(skb, &oldsp->pd_lobby);
9037 __skb_queue_tail(queue, skb);
9038 sctp_skb_set_owner_r_frag(skb, newsk);
9042 /* Clear up any skbs waiting for the partial
9043 * delivery to finish.
9045 if (assoc->ulpq.pd_mode)
9046 sctp_clear_pd(oldsk, NULL);
9050 sctp_for_each_rx_skb(assoc, newsk, sctp_skb_set_owner_r_frag);
9052 /* Set the type of socket to indicate that it is peeled off from the
9053 * original UDP-style socket or created with the accept() call on a
9054 * TCP-style socket..
9058 /* Mark the new socket "in-use" by the user so that any packets
9059 * that may arrive on the association after we've moved it are
9060 * queued to the backlog. This prevents a potential race between
9061 * backlog processing on the old socket and new-packet processing
9062 * on the new socket.
9064 * The caller has just allocated newsk so we can guarantee that other
9065 * paths won't try to lock it and then oldsk.
9067 lock_sock_nested(newsk, SINGLE_DEPTH_NESTING);
9068 sctp_for_each_tx_datachunk(assoc, sctp_clear_owner_w);
9069 sctp_assoc_migrate(assoc, newsk);
9070 sctp_for_each_tx_datachunk(assoc, sctp_set_owner_w);
9072 /* If the association on the newsk is already closed before accept()
9073 * is called, set RCV_SHUTDOWN flag.
9075 if (sctp_state(assoc, CLOSED) && sctp_style(newsk, TCP)) {
9076 inet_sk_set_state(newsk, SCTP_SS_CLOSED);
9077 newsk->sk_shutdown |= RCV_SHUTDOWN;
9079 inet_sk_set_state(newsk, SCTP_SS_ESTABLISHED);
9082 release_sock(newsk);
9086 /* This proto struct describes the ULP interface for SCTP. */
9087 struct proto sctp_prot = {
9089 .owner = THIS_MODULE,
9090 .close = sctp_close,
9091 .disconnect = sctp_disconnect,
9092 .accept = sctp_accept,
9093 .ioctl = sctp_ioctl,
9094 .init = sctp_init_sock,
9095 .destroy = sctp_destroy_sock,
9096 .shutdown = sctp_shutdown,
9097 .setsockopt = sctp_setsockopt,
9098 .getsockopt = sctp_getsockopt,
9099 .sendmsg = sctp_sendmsg,
9100 .recvmsg = sctp_recvmsg,
9102 .backlog_rcv = sctp_backlog_rcv,
9104 .unhash = sctp_unhash,
9105 .get_port = sctp_get_port,
9106 .obj_size = sizeof(struct sctp_sock),
9107 .useroffset = offsetof(struct sctp_sock, subscribe),
9108 .usersize = offsetof(struct sctp_sock, initmsg) -
9109 offsetof(struct sctp_sock, subscribe) +
9110 sizeof_field(struct sctp_sock, initmsg),
9111 .sysctl_mem = sysctl_sctp_mem,
9112 .sysctl_rmem = sysctl_sctp_rmem,
9113 .sysctl_wmem = sysctl_sctp_wmem,
9114 .memory_pressure = &sctp_memory_pressure,
9115 .enter_memory_pressure = sctp_enter_memory_pressure,
9116 .memory_allocated = &sctp_memory_allocated,
9117 .sockets_allocated = &sctp_sockets_allocated,
9120 #if IS_ENABLED(CONFIG_IPV6)
9122 #include <net/transp_v6.h>
9123 static void sctp_v6_destroy_sock(struct sock *sk)
9125 sctp_destroy_sock(sk);
9126 inet6_destroy_sock(sk);
9129 struct proto sctpv6_prot = {
9131 .owner = THIS_MODULE,
9132 .close = sctp_close,
9133 .disconnect = sctp_disconnect,
9134 .accept = sctp_accept,
9135 .ioctl = sctp_ioctl,
9136 .init = sctp_init_sock,
9137 .destroy = sctp_v6_destroy_sock,
9138 .shutdown = sctp_shutdown,
9139 .setsockopt = sctp_setsockopt,
9140 .getsockopt = sctp_getsockopt,
9141 .sendmsg = sctp_sendmsg,
9142 .recvmsg = sctp_recvmsg,
9144 .backlog_rcv = sctp_backlog_rcv,
9146 .unhash = sctp_unhash,
9147 .get_port = sctp_get_port,
9148 .obj_size = sizeof(struct sctp6_sock),
9149 .useroffset = offsetof(struct sctp6_sock, sctp.subscribe),
9150 .usersize = offsetof(struct sctp6_sock, sctp.initmsg) -
9151 offsetof(struct sctp6_sock, sctp.subscribe) +
9152 sizeof_field(struct sctp6_sock, sctp.initmsg),
9153 .sysctl_mem = sysctl_sctp_mem,
9154 .sysctl_rmem = sysctl_sctp_rmem,
9155 .sysctl_wmem = sysctl_sctp_wmem,
9156 .memory_pressure = &sctp_memory_pressure,
9157 .enter_memory_pressure = sctp_enter_memory_pressure,
9158 .memory_allocated = &sctp_memory_allocated,
9159 .sockets_allocated = &sctp_sockets_allocated,
9161 #endif /* IS_ENABLED(CONFIG_IPV6) */