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60c778b2 | 1 | /* SCTP kernel implementation |
1da177e4 LT |
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 | |
8 | * | |
60c778b2 | 9 | * This file is part of the SCTP kernel implementation |
1da177e4 LT |
10 | * |
11 | * These functions interface with the sockets layer to implement the | |
12 | * SCTP Extensions for the Sockets API. | |
13 | * | |
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. | |
17 | * | |
60c778b2 | 18 | * This SCTP implementation is free software; |
1da177e4 LT |
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) | |
22 | * any later version. | |
23 | * | |
60c778b2 | 24 | * This SCTP implementation is distributed in the hope that it |
1da177e4 LT |
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. | |
29 | * | |
30 | * You should have received a copy of the GNU General Public License | |
4b2f13a2 JK |
31 | * along with GNU CC; see the file COPYING. If not, see |
32 | * <http://www.gnu.org/licenses/>. | |
1da177e4 LT |
33 | * |
34 | * Please send any bug reports or fixes you make to the | |
35 | * email address(es): | |
91705c61 | 36 | * lksctp developers <linux-sctp@vger.kernel.org> |
1da177e4 | 37 | * |
1da177e4 LT |
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> | |
1da177e4 LT |
51 | */ |
52 | ||
145ce502 JP |
53 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
54 | ||
5821c769 | 55 | #include <crypto/hash.h> |
1da177e4 LT |
56 | #include <linux/types.h> |
57 | #include <linux/kernel.h> | |
58 | #include <linux/wait.h> | |
59 | #include <linux/time.h> | |
3f07c014 | 60 | #include <linux/sched/signal.h> |
1da177e4 | 61 | #include <linux/ip.h> |
4fc268d2 | 62 | #include <linux/capability.h> |
1da177e4 LT |
63 | #include <linux/fcntl.h> |
64 | #include <linux/poll.h> | |
65 | #include <linux/init.h> | |
5a0e3ad6 | 66 | #include <linux/slab.h> |
56b31d1c | 67 | #include <linux/file.h> |
ffd59393 | 68 | #include <linux/compat.h> |
1da177e4 LT |
69 | |
70 | #include <net/ip.h> | |
71 | #include <net/icmp.h> | |
72 | #include <net/route.h> | |
73 | #include <net/ipv6.h> | |
74 | #include <net/inet_common.h> | |
8465a5fc | 75 | #include <net/busy_poll.h> |
1da177e4 LT |
76 | |
77 | #include <linux/socket.h> /* for sa_family_t */ | |
bc3b2d7f | 78 | #include <linux/export.h> |
1da177e4 LT |
79 | #include <net/sock.h> |
80 | #include <net/sctp/sctp.h> | |
81 | #include <net/sctp/sm.h> | |
13aa8770 | 82 | #include <net/sctp/stream_sched.h> |
1da177e4 | 83 | |
1da177e4 LT |
84 | /* Forward declarations for internal helper functions. */ |
85 | static int sctp_writeable(struct sock *sk); | |
86 | static void sctp_wfree(struct sk_buff *skb); | |
cea0cc80 | 87 | static int sctp_wait_for_sndbuf(struct sctp_association *asoc, long *timeo_p, |
a0ff6600 | 88 | size_t msg_len); |
26ac8e5f | 89 | static int sctp_wait_for_packet(struct sock *sk, int *err, long *timeo_p); |
1da177e4 LT |
90 | static int sctp_wait_for_connect(struct sctp_association *, long *timeo_p); |
91 | static int sctp_wait_for_accept(struct sock *sk, long timeo); | |
92 | static void sctp_wait_for_close(struct sock *sk, long timeo); | |
0a2fbac1 | 93 | static void sctp_destruct_sock(struct sock *sk); |
1da177e4 LT |
94 | static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt, |
95 | union sctp_addr *addr, int len); | |
96 | static int sctp_bindx_add(struct sock *, struct sockaddr *, int); | |
97 | static int sctp_bindx_rem(struct sock *, struct sockaddr *, int); | |
98 | static int sctp_send_asconf_add_ip(struct sock *, struct sockaddr *, int); | |
99 | static int sctp_send_asconf_del_ip(struct sock *, struct sockaddr *, int); | |
100 | static int sctp_send_asconf(struct sctp_association *asoc, | |
101 | struct sctp_chunk *chunk); | |
102 | static int sctp_do_bind(struct sock *, union sctp_addr *, int); | |
103 | static int sctp_autobind(struct sock *sk); | |
b7ef2618 XL |
104 | static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk, |
105 | struct sctp_association *assoc, | |
106 | enum sctp_socket_type type); | |
1da177e4 | 107 | |
06044751 | 108 | static unsigned long sctp_memory_pressure; |
8d987e5c | 109 | static atomic_long_t sctp_memory_allocated; |
1748376b | 110 | struct percpu_counter sctp_sockets_allocated; |
4d93df0a | 111 | |
5c52ba17 | 112 | static void sctp_enter_memory_pressure(struct sock *sk) |
4d93df0a NH |
113 | { |
114 | sctp_memory_pressure = 1; | |
115 | } | |
116 | ||
117 | ||
1da177e4 LT |
118 | /* Get the sndbuf space available at the time on the association. */ |
119 | static inline int sctp_wspace(struct sctp_association *asoc) | |
120 | { | |
4d93df0a | 121 | int amt; |
1da177e4 | 122 | |
4d93df0a NH |
123 | if (asoc->ep->sndbuf_policy) |
124 | amt = asoc->sndbuf_used; | |
125 | else | |
31e6d363 | 126 | amt = sk_wmem_alloc_get(asoc->base.sk); |
4d93df0a NH |
127 | |
128 | if (amt >= asoc->base.sk->sk_sndbuf) { | |
129 | if (asoc->base.sk->sk_userlocks & SOCK_SNDBUF_LOCK) | |
130 | amt = 0; | |
131 | else { | |
132 | amt = sk_stream_wspace(asoc->base.sk); | |
133 | if (amt < 0) | |
134 | amt = 0; | |
135 | } | |
4eb701df | 136 | } else { |
4d93df0a | 137 | amt = asoc->base.sk->sk_sndbuf - amt; |
4eb701df | 138 | } |
1da177e4 LT |
139 | return amt; |
140 | } | |
141 | ||
142 | /* Increment the used sndbuf space count of the corresponding association by | |
143 | * the size of the outgoing data chunk. | |
144 | * Also, set the skb destructor for sndbuf accounting later. | |
145 | * | |
146 | * Since it is always 1-1 between chunk and skb, and also a new skb is always | |
147 | * allocated for chunk bundling in sctp_packet_transmit(), we can use the | |
148 | * destructor in the data chunk skb for the purpose of the sndbuf space | |
149 | * tracking. | |
150 | */ | |
151 | static inline void sctp_set_owner_w(struct sctp_chunk *chunk) | |
152 | { | |
153 | struct sctp_association *asoc = chunk->asoc; | |
154 | struct sock *sk = asoc->base.sk; | |
155 | ||
156 | /* The sndbuf space is tracked per association. */ | |
157 | sctp_association_hold(asoc); | |
158 | ||
4eb701df NH |
159 | skb_set_owner_w(chunk->skb, sk); |
160 | ||
1da177e4 LT |
161 | chunk->skb->destructor = sctp_wfree; |
162 | /* Save the chunk pointer in skb for sctp_wfree to use later. */ | |
f869c912 | 163 | skb_shinfo(chunk->skb)->destructor_arg = chunk; |
1da177e4 | 164 | |
4eb701df NH |
165 | asoc->sndbuf_used += SCTP_DATA_SNDSIZE(chunk) + |
166 | sizeof(struct sk_buff) + | |
167 | sizeof(struct sctp_chunk); | |
168 | ||
14afee4b | 169 | refcount_add(sizeof(struct sctp_chunk), &sk->sk_wmem_alloc); |
3ab224be HA |
170 | sk->sk_wmem_queued += chunk->skb->truesize; |
171 | sk_mem_charge(sk, chunk->skb->truesize); | |
1da177e4 LT |
172 | } |
173 | ||
d04adf1b XL |
174 | static void sctp_clear_owner_w(struct sctp_chunk *chunk) |
175 | { | |
176 | skb_orphan(chunk->skb); | |
177 | } | |
178 | ||
179 | static void sctp_for_each_tx_datachunk(struct sctp_association *asoc, | |
180 | void (*cb)(struct sctp_chunk *)) | |
181 | ||
182 | { | |
183 | struct sctp_outq *q = &asoc->outqueue; | |
184 | struct sctp_transport *t; | |
185 | struct sctp_chunk *chunk; | |
186 | ||
187 | list_for_each_entry(t, &asoc->peer.transport_addr_list, transports) | |
188 | list_for_each_entry(chunk, &t->transmitted, transmitted_list) | |
189 | cb(chunk); | |
190 | ||
a8dd3979 | 191 | list_for_each_entry(chunk, &q->retransmit, transmitted_list) |
d04adf1b XL |
192 | cb(chunk); |
193 | ||
a8dd3979 | 194 | list_for_each_entry(chunk, &q->sacked, transmitted_list) |
d04adf1b XL |
195 | cb(chunk); |
196 | ||
a8dd3979 | 197 | list_for_each_entry(chunk, &q->abandoned, transmitted_list) |
d04adf1b XL |
198 | cb(chunk); |
199 | ||
200 | list_for_each_entry(chunk, &q->out_chunk_list, list) | |
201 | cb(chunk); | |
202 | } | |
203 | ||
13228238 XL |
204 | static void sctp_for_each_rx_skb(struct sctp_association *asoc, struct sock *sk, |
205 | void (*cb)(struct sk_buff *, struct sock *)) | |
206 | ||
207 | { | |
208 | struct sk_buff *skb, *tmp; | |
209 | ||
210 | sctp_skb_for_each(skb, &asoc->ulpq.lobby, tmp) | |
211 | cb(skb, sk); | |
212 | ||
213 | sctp_skb_for_each(skb, &asoc->ulpq.reasm, tmp) | |
214 | cb(skb, sk); | |
215 | ||
216 | sctp_skb_for_each(skb, &asoc->ulpq.reasm_uo, tmp) | |
217 | cb(skb, sk); | |
218 | } | |
219 | ||
1da177e4 LT |
220 | /* Verify that this is a valid address. */ |
221 | static inline int sctp_verify_addr(struct sock *sk, union sctp_addr *addr, | |
222 | int len) | |
223 | { | |
224 | struct sctp_af *af; | |
225 | ||
226 | /* Verify basic sockaddr. */ | |
227 | af = sctp_sockaddr_af(sctp_sk(sk), addr, len); | |
228 | if (!af) | |
229 | return -EINVAL; | |
230 | ||
231 | /* Is this a valid SCTP address? */ | |
5636bef7 | 232 | if (!af->addr_valid(addr, sctp_sk(sk), NULL)) |
1da177e4 LT |
233 | return -EINVAL; |
234 | ||
235 | if (!sctp_sk(sk)->pf->send_verify(sctp_sk(sk), (addr))) | |
236 | return -EINVAL; | |
237 | ||
238 | return 0; | |
239 | } | |
240 | ||
241 | /* Look up the association by its id. If this is not a UDP-style | |
242 | * socket, the ID field is always ignored. | |
243 | */ | |
244 | struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id) | |
245 | { | |
246 | struct sctp_association *asoc = NULL; | |
247 | ||
248 | /* If this is not a UDP-style socket, assoc id should be ignored. */ | |
249 | if (!sctp_style(sk, UDP)) { | |
250 | /* Return NULL if the socket state is not ESTABLISHED. It | |
251 | * could be a TCP-style listening socket or a socket which | |
252 | * hasn't yet called connect() to establish an association. | |
253 | */ | |
e5b13f34 | 254 | if (!sctp_sstate(sk, ESTABLISHED) && !sctp_sstate(sk, CLOSING)) |
1da177e4 LT |
255 | return NULL; |
256 | ||
257 | /* Get the first and the only association from the list. */ | |
258 | if (!list_empty(&sctp_sk(sk)->ep->asocs)) | |
259 | asoc = list_entry(sctp_sk(sk)->ep->asocs.next, | |
260 | struct sctp_association, asocs); | |
261 | return asoc; | |
262 | } | |
263 | ||
264 | /* Otherwise this is a UDP-style socket. */ | |
265 | if (!id || (id == (sctp_assoc_t)-1)) | |
266 | return NULL; | |
267 | ||
268 | spin_lock_bh(&sctp_assocs_id_lock); | |
269 | asoc = (struct sctp_association *)idr_find(&sctp_assocs_id, (int)id); | |
270 | spin_unlock_bh(&sctp_assocs_id_lock); | |
271 | ||
272 | if (!asoc || (asoc->base.sk != sk) || asoc->base.dead) | |
273 | return NULL; | |
274 | ||
275 | return asoc; | |
276 | } | |
277 | ||
278 | /* Look up the transport from an address and an assoc id. If both address and | |
279 | * id are specified, the associations matching the address and the id should be | |
280 | * the same. | |
281 | */ | |
282 | static struct sctp_transport *sctp_addr_id2transport(struct sock *sk, | |
283 | struct sockaddr_storage *addr, | |
284 | sctp_assoc_t id) | |
285 | { | |
286 | struct sctp_association *addr_asoc = NULL, *id_asoc = NULL; | |
6f29a130 | 287 | struct sctp_af *af = sctp_get_af_specific(addr->ss_family); |
1da177e4 | 288 | union sctp_addr *laddr = (union sctp_addr *)addr; |
6f29a130 XL |
289 | struct sctp_transport *transport; |
290 | ||
912964ea | 291 | if (!af || sctp_verify_addr(sk, laddr, af->sockaddr_len)) |
6f29a130 | 292 | return NULL; |
1da177e4 | 293 | |
1da177e4 | 294 | addr_asoc = sctp_endpoint_lookup_assoc(sctp_sk(sk)->ep, |
cd4ff034 | 295 | laddr, |
1da177e4 | 296 | &transport); |
1da177e4 LT |
297 | |
298 | if (!addr_asoc) | |
299 | return NULL; | |
300 | ||
301 | id_asoc = sctp_id2assoc(sk, id); | |
302 | if (id_asoc && (id_asoc != addr_asoc)) | |
303 | return NULL; | |
304 | ||
299ee123 | 305 | sctp_get_pf_specific(sk->sk_family)->addr_to_user(sctp_sk(sk), |
1da177e4 LT |
306 | (union sctp_addr *)addr); |
307 | ||
308 | return transport; | |
309 | } | |
310 | ||
311 | /* API 3.1.2 bind() - UDP Style Syntax | |
312 | * The syntax of bind() is, | |
313 | * | |
314 | * ret = bind(int sd, struct sockaddr *addr, int addrlen); | |
315 | * | |
316 | * sd - the socket descriptor returned by socket(). | |
317 | * addr - the address structure (struct sockaddr_in or struct | |
318 | * sockaddr_in6 [RFC 2553]), | |
319 | * addr_len - the size of the address structure. | |
320 | */ | |
dda91928 | 321 | static int sctp_bind(struct sock *sk, struct sockaddr *addr, int addr_len) |
1da177e4 LT |
322 | { |
323 | int retval = 0; | |
324 | ||
048ed4b6 | 325 | lock_sock(sk); |
1da177e4 | 326 | |
bb33381d DB |
327 | pr_debug("%s: sk:%p, addr:%p, addr_len:%d\n", __func__, sk, |
328 | addr, addr_len); | |
1da177e4 LT |
329 | |
330 | /* Disallow binding twice. */ | |
331 | if (!sctp_sk(sk)->ep->base.bind_addr.port) | |
3f7a87d2 | 332 | retval = sctp_do_bind(sk, (union sctp_addr *)addr, |
1da177e4 LT |
333 | addr_len); |
334 | else | |
335 | retval = -EINVAL; | |
336 | ||
048ed4b6 | 337 | release_sock(sk); |
1da177e4 LT |
338 | |
339 | return retval; | |
340 | } | |
341 | ||
342 | static long sctp_get_port_local(struct sock *, union sctp_addr *); | |
343 | ||
344 | /* Verify this is a valid sockaddr. */ | |
345 | static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt, | |
346 | union sctp_addr *addr, int len) | |
347 | { | |
348 | struct sctp_af *af; | |
349 | ||
350 | /* Check minimum size. */ | |
351 | if (len < sizeof (struct sockaddr)) | |
352 | return NULL; | |
353 | ||
c5006b8a XL |
354 | if (!opt->pf->af_supported(addr->sa.sa_family, opt)) |
355 | return NULL; | |
356 | ||
7dab83de VY |
357 | /* V4 mapped address are really of AF_INET family */ |
358 | if (addr->sa.sa_family == AF_INET6 && | |
c5006b8a XL |
359 | ipv6_addr_v4mapped(&addr->v6.sin6_addr) && |
360 | !opt->pf->af_supported(AF_INET, opt)) | |
361 | return NULL; | |
1da177e4 LT |
362 | |
363 | /* If we get this far, af is valid. */ | |
364 | af = sctp_get_af_specific(addr->sa.sa_family); | |
365 | ||
366 | if (len < af->sockaddr_len) | |
367 | return NULL; | |
368 | ||
369 | return af; | |
370 | } | |
371 | ||
372 | /* Bind a local address either to an endpoint or to an association. */ | |
dda91928 | 373 | static int sctp_do_bind(struct sock *sk, union sctp_addr *addr, int len) |
1da177e4 | 374 | { |
3594698a | 375 | struct net *net = sock_net(sk); |
1da177e4 LT |
376 | struct sctp_sock *sp = sctp_sk(sk); |
377 | struct sctp_endpoint *ep = sp->ep; | |
378 | struct sctp_bind_addr *bp = &ep->base.bind_addr; | |
379 | struct sctp_af *af; | |
380 | unsigned short snum; | |
381 | int ret = 0; | |
382 | ||
1da177e4 LT |
383 | /* Common sockaddr verification. */ |
384 | af = sctp_sockaddr_af(sp, addr, len); | |
3f7a87d2 | 385 | if (!af) { |
bb33381d DB |
386 | pr_debug("%s: sk:%p, newaddr:%p, len:%d EINVAL\n", |
387 | __func__, sk, addr, len); | |
1da177e4 | 388 | return -EINVAL; |
3f7a87d2 FF |
389 | } |
390 | ||
391 | snum = ntohs(addr->v4.sin_port); | |
392 | ||
bb33381d DB |
393 | pr_debug("%s: sk:%p, new addr:%pISc, port:%d, new port:%d, len:%d\n", |
394 | __func__, sk, &addr->sa, bp->port, snum, len); | |
1da177e4 LT |
395 | |
396 | /* PF specific bind() address verification. */ | |
397 | if (!sp->pf->bind_verify(sp, addr)) | |
398 | return -EADDRNOTAVAIL; | |
399 | ||
8b358056 VY |
400 | /* We must either be unbound, or bind to the same port. |
401 | * It's OK to allow 0 ports if we are already bound. | |
402 | * We'll just inhert an already bound port in this case | |
403 | */ | |
404 | if (bp->port) { | |
405 | if (!snum) | |
406 | snum = bp->port; | |
407 | else if (snum != bp->port) { | |
bb33381d DB |
408 | pr_debug("%s: new port %d doesn't match existing port " |
409 | "%d\n", __func__, snum, bp->port); | |
8b358056 VY |
410 | return -EINVAL; |
411 | } | |
1da177e4 LT |
412 | } |
413 | ||
4548b683 | 414 | if (snum && snum < inet_prot_sock(net) && |
3594698a | 415 | !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE)) |
1da177e4 LT |
416 | return -EACCES; |
417 | ||
4e54064e VY |
418 | /* See if the address matches any of the addresses we may have |
419 | * already bound before checking against other endpoints. | |
420 | */ | |
421 | if (sctp_bind_addr_match(bp, addr, sp)) | |
422 | return -EINVAL; | |
423 | ||
1da177e4 LT |
424 | /* Make sure we are allowed to bind here. |
425 | * The function sctp_get_port_local() does duplicate address | |
426 | * detection. | |
427 | */ | |
2772b495 | 428 | addr->v4.sin_port = htons(snum); |
1da177e4 | 429 | if ((ret = sctp_get_port_local(sk, addr))) { |
4e54064e | 430 | return -EADDRINUSE; |
1da177e4 LT |
431 | } |
432 | ||
433 | /* Refresh ephemeral port. */ | |
434 | if (!bp->port) | |
c720c7e8 | 435 | bp->port = inet_sk(sk)->inet_num; |
1da177e4 | 436 | |
559cf710 VY |
437 | /* Add the address to the bind address list. |
438 | * Use GFP_ATOMIC since BHs will be disabled. | |
439 | */ | |
133800d1 MRL |
440 | ret = sctp_add_bind_addr(bp, addr, af->sockaddr_len, |
441 | SCTP_ADDR_SRC, GFP_ATOMIC); | |
1da177e4 LT |
442 | |
443 | /* Copy back into socket for getsockname() use. */ | |
444 | if (!ret) { | |
c720c7e8 | 445 | inet_sk(sk)->inet_sport = htons(inet_sk(sk)->inet_num); |
299ee123 | 446 | sp->pf->to_sk_saddr(addr, sk); |
1da177e4 LT |
447 | } |
448 | ||
449 | return ret; | |
450 | } | |
451 | ||
452 | /* ADDIP Section 4.1.1 Congestion Control of ASCONF Chunks | |
453 | * | |
d808ad9a | 454 | * R1) One and only one ASCONF Chunk MAY be in transit and unacknowledged |
1da177e4 | 455 | * at any one time. If a sender, after sending an ASCONF chunk, decides |
d808ad9a | 456 | * it needs to transfer another ASCONF Chunk, it MUST wait until the |
1da177e4 | 457 | * ASCONF-ACK Chunk returns from the previous ASCONF Chunk before sending a |
d808ad9a YH |
458 | * subsequent ASCONF. Note this restriction binds each side, so at any |
459 | * time two ASCONF may be in-transit on any given association (one sent | |
1da177e4 LT |
460 | * from each endpoint). |
461 | */ | |
462 | static int sctp_send_asconf(struct sctp_association *asoc, | |
463 | struct sctp_chunk *chunk) | |
464 | { | |
55e26eb9 | 465 | struct net *net = sock_net(asoc->base.sk); |
1da177e4 LT |
466 | int retval = 0; |
467 | ||
468 | /* If there is an outstanding ASCONF chunk, queue it for later | |
469 | * transmission. | |
d808ad9a | 470 | */ |
1da177e4 | 471 | if (asoc->addip_last_asconf) { |
79af02c2 | 472 | list_add_tail(&chunk->list, &asoc->addip_chunk_list); |
d808ad9a | 473 | goto out; |
1da177e4 LT |
474 | } |
475 | ||
476 | /* Hold the chunk until an ASCONF_ACK is received. */ | |
477 | sctp_chunk_hold(chunk); | |
55e26eb9 | 478 | retval = sctp_primitive_ASCONF(net, asoc, chunk); |
1da177e4 LT |
479 | if (retval) |
480 | sctp_chunk_free(chunk); | |
481 | else | |
482 | asoc->addip_last_asconf = chunk; | |
483 | ||
484 | out: | |
485 | return retval; | |
486 | } | |
487 | ||
488 | /* Add a list of addresses as bind addresses to local endpoint or | |
489 | * association. | |
490 | * | |
491 | * Basically run through each address specified in the addrs/addrcnt | |
492 | * array/length pair, determine if it is IPv6 or IPv4 and call | |
493 | * sctp_do_bind() on it. | |
494 | * | |
495 | * If any of them fails, then the operation will be reversed and the | |
496 | * ones that were added will be removed. | |
497 | * | |
498 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
499 | */ | |
04675210 | 500 | static int sctp_bindx_add(struct sock *sk, struct sockaddr *addrs, int addrcnt) |
1da177e4 LT |
501 | { |
502 | int cnt; | |
503 | int retval = 0; | |
504 | void *addr_buf; | |
505 | struct sockaddr *sa_addr; | |
506 | struct sctp_af *af; | |
507 | ||
bb33381d DB |
508 | pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", __func__, sk, |
509 | addrs, addrcnt); | |
1da177e4 LT |
510 | |
511 | addr_buf = addrs; | |
512 | for (cnt = 0; cnt < addrcnt; cnt++) { | |
513 | /* The list may contain either IPv4 or IPv6 address; | |
514 | * determine the address length for walking thru the list. | |
515 | */ | |
ea110733 | 516 | sa_addr = addr_buf; |
1da177e4 LT |
517 | af = sctp_get_af_specific(sa_addr->sa_family); |
518 | if (!af) { | |
519 | retval = -EINVAL; | |
520 | goto err_bindx_add; | |
521 | } | |
522 | ||
d808ad9a | 523 | retval = sctp_do_bind(sk, (union sctp_addr *)sa_addr, |
1da177e4 LT |
524 | af->sockaddr_len); |
525 | ||
526 | addr_buf += af->sockaddr_len; | |
527 | ||
528 | err_bindx_add: | |
529 | if (retval < 0) { | |
530 | /* Failed. Cleanup the ones that have been added */ | |
531 | if (cnt > 0) | |
532 | sctp_bindx_rem(sk, addrs, cnt); | |
533 | return retval; | |
534 | } | |
535 | } | |
536 | ||
537 | return retval; | |
538 | } | |
539 | ||
540 | /* Send an ASCONF chunk with Add IP address parameters to all the peers of the | |
541 | * associations that are part of the endpoint indicating that a list of local | |
542 | * addresses are added to the endpoint. | |
543 | * | |
d808ad9a | 544 | * If any of the addresses is already in the bind address list of the |
1da177e4 LT |
545 | * association, we do not send the chunk for that association. But it will not |
546 | * affect other associations. | |
547 | * | |
548 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
549 | */ | |
d808ad9a | 550 | static int sctp_send_asconf_add_ip(struct sock *sk, |
1da177e4 LT |
551 | struct sockaddr *addrs, |
552 | int addrcnt) | |
553 | { | |
e1fc3b14 | 554 | struct net *net = sock_net(sk); |
1da177e4 LT |
555 | struct sctp_sock *sp; |
556 | struct sctp_endpoint *ep; | |
557 | struct sctp_association *asoc; | |
558 | struct sctp_bind_addr *bp; | |
559 | struct sctp_chunk *chunk; | |
560 | struct sctp_sockaddr_entry *laddr; | |
561 | union sctp_addr *addr; | |
dc022a98 | 562 | union sctp_addr saveaddr; |
1da177e4 LT |
563 | void *addr_buf; |
564 | struct sctp_af *af; | |
1da177e4 LT |
565 | struct list_head *p; |
566 | int i; | |
567 | int retval = 0; | |
568 | ||
e1fc3b14 | 569 | if (!net->sctp.addip_enable) |
1da177e4 LT |
570 | return retval; |
571 | ||
572 | sp = sctp_sk(sk); | |
573 | ep = sp->ep; | |
574 | ||
bb33381d DB |
575 | pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", |
576 | __func__, sk, addrs, addrcnt); | |
1da177e4 | 577 | |
9dbc15f0 | 578 | list_for_each_entry(asoc, &ep->asocs, asocs) { |
1da177e4 LT |
579 | if (!asoc->peer.asconf_capable) |
580 | continue; | |
581 | ||
582 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_ADD_IP) | |
583 | continue; | |
584 | ||
585 | if (!sctp_state(asoc, ESTABLISHED)) | |
586 | continue; | |
587 | ||
588 | /* Check if any address in the packed array of addresses is | |
d808ad9a YH |
589 | * in the bind address list of the association. If so, |
590 | * do not send the asconf chunk to its peer, but continue with | |
1da177e4 LT |
591 | * other associations. |
592 | */ | |
593 | addr_buf = addrs; | |
594 | for (i = 0; i < addrcnt; i++) { | |
ea110733 | 595 | addr = addr_buf; |
1da177e4 LT |
596 | af = sctp_get_af_specific(addr->v4.sin_family); |
597 | if (!af) { | |
598 | retval = -EINVAL; | |
599 | goto out; | |
600 | } | |
601 | ||
602 | if (sctp_assoc_lookup_laddr(asoc, addr)) | |
603 | break; | |
604 | ||
605 | addr_buf += af->sockaddr_len; | |
606 | } | |
607 | if (i < addrcnt) | |
608 | continue; | |
609 | ||
559cf710 VY |
610 | /* Use the first valid address in bind addr list of |
611 | * association as Address Parameter of ASCONF CHUNK. | |
1da177e4 | 612 | */ |
1da177e4 LT |
613 | bp = &asoc->base.bind_addr; |
614 | p = bp->address_list.next; | |
615 | laddr = list_entry(p, struct sctp_sockaddr_entry, list); | |
5ae955cf | 616 | chunk = sctp_make_asconf_update_ip(asoc, &laddr->a, addrs, |
1da177e4 LT |
617 | addrcnt, SCTP_PARAM_ADD_IP); |
618 | if (!chunk) { | |
619 | retval = -ENOMEM; | |
620 | goto out; | |
621 | } | |
622 | ||
dc022a98 SS |
623 | /* Add the new addresses to the bind address list with |
624 | * use_as_src set to 0. | |
1da177e4 | 625 | */ |
dc022a98 SS |
626 | addr_buf = addrs; |
627 | for (i = 0; i < addrcnt; i++) { | |
ea110733 | 628 | addr = addr_buf; |
dc022a98 SS |
629 | af = sctp_get_af_specific(addr->v4.sin_family); |
630 | memcpy(&saveaddr, addr, af->sockaddr_len); | |
f57d96b2 | 631 | retval = sctp_add_bind_addr(bp, &saveaddr, |
133800d1 | 632 | sizeof(saveaddr), |
f57d96b2 | 633 | SCTP_ADDR_NEW, GFP_ATOMIC); |
dc022a98 SS |
634 | addr_buf += af->sockaddr_len; |
635 | } | |
8a07eb0a MH |
636 | if (asoc->src_out_of_asoc_ok) { |
637 | struct sctp_transport *trans; | |
638 | ||
639 | list_for_each_entry(trans, | |
640 | &asoc->peer.transport_addr_list, transports) { | |
641 | /* Clear the source and route cache */ | |
c86a773c | 642 | sctp_transport_dst_release(trans); |
8a07eb0a MH |
643 | trans->cwnd = min(4*asoc->pathmtu, max_t(__u32, |
644 | 2*asoc->pathmtu, 4380)); | |
645 | trans->ssthresh = asoc->peer.i.a_rwnd; | |
646 | trans->rto = asoc->rto_initial; | |
196d6759 | 647 | sctp_max_rto(asoc, trans); |
8a07eb0a MH |
648 | trans->rtt = trans->srtt = trans->rttvar = 0; |
649 | sctp_transport_route(trans, NULL, | |
650 | sctp_sk(asoc->base.sk)); | |
651 | } | |
652 | } | |
653 | retval = sctp_send_asconf(asoc, chunk); | |
1da177e4 LT |
654 | } |
655 | ||
656 | out: | |
657 | return retval; | |
658 | } | |
659 | ||
660 | /* Remove a list of addresses from bind addresses list. Do not remove the | |
661 | * last address. | |
662 | * | |
663 | * Basically run through each address specified in the addrs/addrcnt | |
664 | * array/length pair, determine if it is IPv6 or IPv4 and call | |
665 | * sctp_del_bind() on it. | |
666 | * | |
667 | * If any of them fails, then the operation will be reversed and the | |
668 | * ones that were removed will be added back. | |
669 | * | |
670 | * At least one address has to be left; if only one address is | |
671 | * available, the operation will return -EBUSY. | |
672 | * | |
673 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
674 | */ | |
04675210 | 675 | static int sctp_bindx_rem(struct sock *sk, struct sockaddr *addrs, int addrcnt) |
1da177e4 LT |
676 | { |
677 | struct sctp_sock *sp = sctp_sk(sk); | |
678 | struct sctp_endpoint *ep = sp->ep; | |
679 | int cnt; | |
680 | struct sctp_bind_addr *bp = &ep->base.bind_addr; | |
681 | int retval = 0; | |
1da177e4 | 682 | void *addr_buf; |
c9a08505 | 683 | union sctp_addr *sa_addr; |
1da177e4 LT |
684 | struct sctp_af *af; |
685 | ||
bb33381d DB |
686 | pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", |
687 | __func__, sk, addrs, addrcnt); | |
1da177e4 LT |
688 | |
689 | addr_buf = addrs; | |
690 | for (cnt = 0; cnt < addrcnt; cnt++) { | |
691 | /* If the bind address list is empty or if there is only one | |
692 | * bind address, there is nothing more to be removed (we need | |
693 | * at least one address here). | |
694 | */ | |
695 | if (list_empty(&bp->address_list) || | |
696 | (sctp_list_single_entry(&bp->address_list))) { | |
697 | retval = -EBUSY; | |
698 | goto err_bindx_rem; | |
699 | } | |
700 | ||
ea110733 | 701 | sa_addr = addr_buf; |
c9a08505 | 702 | af = sctp_get_af_specific(sa_addr->sa.sa_family); |
1da177e4 LT |
703 | if (!af) { |
704 | retval = -EINVAL; | |
705 | goto err_bindx_rem; | |
706 | } | |
0304ff8a PG |
707 | |
708 | if (!af->addr_valid(sa_addr, sp, NULL)) { | |
709 | retval = -EADDRNOTAVAIL; | |
710 | goto err_bindx_rem; | |
711 | } | |
712 | ||
ee9cbaca VY |
713 | if (sa_addr->v4.sin_port && |
714 | sa_addr->v4.sin_port != htons(bp->port)) { | |
1da177e4 LT |
715 | retval = -EINVAL; |
716 | goto err_bindx_rem; | |
717 | } | |
718 | ||
ee9cbaca VY |
719 | if (!sa_addr->v4.sin_port) |
720 | sa_addr->v4.sin_port = htons(bp->port); | |
721 | ||
1da177e4 LT |
722 | /* FIXME - There is probably a need to check if sk->sk_saddr and |
723 | * sk->sk_rcv_addr are currently set to one of the addresses to | |
724 | * be removed. This is something which needs to be looked into | |
725 | * when we are fixing the outstanding issues with multi-homing | |
726 | * socket routing and failover schemes. Refer to comments in | |
727 | * sctp_do_bind(). -daisy | |
728 | */ | |
0ed90fb0 | 729 | retval = sctp_del_bind_addr(bp, sa_addr); |
1da177e4 LT |
730 | |
731 | addr_buf += af->sockaddr_len; | |
732 | err_bindx_rem: | |
733 | if (retval < 0) { | |
734 | /* Failed. Add the ones that has been removed back */ | |
735 | if (cnt > 0) | |
736 | sctp_bindx_add(sk, addrs, cnt); | |
737 | return retval; | |
738 | } | |
739 | } | |
740 | ||
741 | return retval; | |
742 | } | |
743 | ||
744 | /* Send an ASCONF chunk with Delete IP address parameters to all the peers of | |
745 | * the associations that are part of the endpoint indicating that a list of | |
746 | * local addresses are removed from the endpoint. | |
747 | * | |
d808ad9a | 748 | * If any of the addresses is already in the bind address list of the |
1da177e4 LT |
749 | * association, we do not send the chunk for that association. But it will not |
750 | * affect other associations. | |
751 | * | |
752 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
753 | */ | |
754 | static int sctp_send_asconf_del_ip(struct sock *sk, | |
755 | struct sockaddr *addrs, | |
756 | int addrcnt) | |
757 | { | |
e1fc3b14 | 758 | struct net *net = sock_net(sk); |
1da177e4 LT |
759 | struct sctp_sock *sp; |
760 | struct sctp_endpoint *ep; | |
761 | struct sctp_association *asoc; | |
dc022a98 | 762 | struct sctp_transport *transport; |
1da177e4 LT |
763 | struct sctp_bind_addr *bp; |
764 | struct sctp_chunk *chunk; | |
765 | union sctp_addr *laddr; | |
766 | void *addr_buf; | |
767 | struct sctp_af *af; | |
dc022a98 | 768 | struct sctp_sockaddr_entry *saddr; |
1da177e4 LT |
769 | int i; |
770 | int retval = 0; | |
8a07eb0a | 771 | int stored = 0; |
1da177e4 | 772 | |
8a07eb0a | 773 | chunk = NULL; |
e1fc3b14 | 774 | if (!net->sctp.addip_enable) |
1da177e4 LT |
775 | return retval; |
776 | ||
777 | sp = sctp_sk(sk); | |
778 | ep = sp->ep; | |
779 | ||
bb33381d DB |
780 | pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", |
781 | __func__, sk, addrs, addrcnt); | |
1da177e4 | 782 | |
9dbc15f0 | 783 | list_for_each_entry(asoc, &ep->asocs, asocs) { |
1da177e4 LT |
784 | |
785 | if (!asoc->peer.asconf_capable) | |
786 | continue; | |
787 | ||
788 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_DEL_IP) | |
789 | continue; | |
790 | ||
791 | if (!sctp_state(asoc, ESTABLISHED)) | |
792 | continue; | |
793 | ||
794 | /* Check if any address in the packed array of addresses is | |
d808ad9a | 795 | * not present in the bind address list of the association. |
1da177e4 LT |
796 | * If so, do not send the asconf chunk to its peer, but |
797 | * continue with other associations. | |
798 | */ | |
799 | addr_buf = addrs; | |
800 | for (i = 0; i < addrcnt; i++) { | |
ea110733 | 801 | laddr = addr_buf; |
1da177e4 LT |
802 | af = sctp_get_af_specific(laddr->v4.sin_family); |
803 | if (!af) { | |
804 | retval = -EINVAL; | |
805 | goto out; | |
806 | } | |
807 | ||
808 | if (!sctp_assoc_lookup_laddr(asoc, laddr)) | |
809 | break; | |
810 | ||
811 | addr_buf += af->sockaddr_len; | |
812 | } | |
813 | if (i < addrcnt) | |
814 | continue; | |
815 | ||
816 | /* Find one address in the association's bind address list | |
817 | * that is not in the packed array of addresses. This is to | |
818 | * make sure that we do not delete all the addresses in the | |
819 | * association. | |
820 | */ | |
1da177e4 LT |
821 | bp = &asoc->base.bind_addr; |
822 | laddr = sctp_find_unmatch_addr(bp, (union sctp_addr *)addrs, | |
823 | addrcnt, sp); | |
8a07eb0a MH |
824 | if ((laddr == NULL) && (addrcnt == 1)) { |
825 | if (asoc->asconf_addr_del_pending) | |
826 | continue; | |
827 | asoc->asconf_addr_del_pending = | |
828 | kzalloc(sizeof(union sctp_addr), GFP_ATOMIC); | |
6d65e5ee MH |
829 | if (asoc->asconf_addr_del_pending == NULL) { |
830 | retval = -ENOMEM; | |
831 | goto out; | |
832 | } | |
8a07eb0a MH |
833 | asoc->asconf_addr_del_pending->sa.sa_family = |
834 | addrs->sa_family; | |
835 | asoc->asconf_addr_del_pending->v4.sin_port = | |
836 | htons(bp->port); | |
837 | if (addrs->sa_family == AF_INET) { | |
838 | struct sockaddr_in *sin; | |
839 | ||
840 | sin = (struct sockaddr_in *)addrs; | |
841 | asoc->asconf_addr_del_pending->v4.sin_addr.s_addr = sin->sin_addr.s_addr; | |
842 | } else if (addrs->sa_family == AF_INET6) { | |
843 | struct sockaddr_in6 *sin6; | |
844 | ||
845 | sin6 = (struct sockaddr_in6 *)addrs; | |
4e3fd7a0 | 846 | asoc->asconf_addr_del_pending->v6.sin6_addr = sin6->sin6_addr; |
8a07eb0a | 847 | } |
bb33381d DB |
848 | |
849 | pr_debug("%s: keep the last address asoc:%p %pISc at %p\n", | |
850 | __func__, asoc, &asoc->asconf_addr_del_pending->sa, | |
851 | asoc->asconf_addr_del_pending); | |
852 | ||
8a07eb0a MH |
853 | asoc->src_out_of_asoc_ok = 1; |
854 | stored = 1; | |
855 | goto skip_mkasconf; | |
856 | } | |
1da177e4 | 857 | |
88362ad8 DB |
858 | if (laddr == NULL) |
859 | return -EINVAL; | |
860 | ||
559cf710 VY |
861 | /* We do not need RCU protection throughout this loop |
862 | * because this is done under a socket lock from the | |
863 | * setsockopt call. | |
864 | */ | |
1da177e4 LT |
865 | chunk = sctp_make_asconf_update_ip(asoc, laddr, addrs, addrcnt, |
866 | SCTP_PARAM_DEL_IP); | |
867 | if (!chunk) { | |
868 | retval = -ENOMEM; | |
869 | goto out; | |
870 | } | |
871 | ||
8a07eb0a | 872 | skip_mkasconf: |
dc022a98 SS |
873 | /* Reset use_as_src flag for the addresses in the bind address |
874 | * list that are to be deleted. | |
875 | */ | |
dc022a98 SS |
876 | addr_buf = addrs; |
877 | for (i = 0; i < addrcnt; i++) { | |
ea110733 | 878 | laddr = addr_buf; |
dc022a98 | 879 | af = sctp_get_af_specific(laddr->v4.sin_family); |
559cf710 | 880 | list_for_each_entry(saddr, &bp->address_list, list) { |
5f242a13 | 881 | if (sctp_cmp_addr_exact(&saddr->a, laddr)) |
f57d96b2 | 882 | saddr->state = SCTP_ADDR_DEL; |
dc022a98 SS |
883 | } |
884 | addr_buf += af->sockaddr_len; | |
885 | } | |
1da177e4 | 886 | |
dc022a98 SS |
887 | /* Update the route and saddr entries for all the transports |
888 | * as some of the addresses in the bind address list are | |
889 | * about to be deleted and cannot be used as source addresses. | |
1da177e4 | 890 | */ |
9dbc15f0 RD |
891 | list_for_each_entry(transport, &asoc->peer.transport_addr_list, |
892 | transports) { | |
c86a773c | 893 | sctp_transport_dst_release(transport); |
dc022a98 SS |
894 | sctp_transport_route(transport, NULL, |
895 | sctp_sk(asoc->base.sk)); | |
896 | } | |
897 | ||
8a07eb0a MH |
898 | if (stored) |
899 | /* We don't need to transmit ASCONF */ | |
900 | continue; | |
dc022a98 | 901 | retval = sctp_send_asconf(asoc, chunk); |
1da177e4 LT |
902 | } |
903 | out: | |
904 | return retval; | |
905 | } | |
906 | ||
9f7d653b MH |
907 | /* set addr events to assocs in the endpoint. ep and addr_wq must be locked */ |
908 | int sctp_asconf_mgmt(struct sctp_sock *sp, struct sctp_sockaddr_entry *addrw) | |
909 | { | |
910 | struct sock *sk = sctp_opt2sk(sp); | |
911 | union sctp_addr *addr; | |
912 | struct sctp_af *af; | |
913 | ||
914 | /* It is safe to write port space in caller. */ | |
915 | addr = &addrw->a; | |
916 | addr->v4.sin_port = htons(sp->ep->base.bind_addr.port); | |
917 | af = sctp_get_af_specific(addr->sa.sa_family); | |
918 | if (!af) | |
919 | return -EINVAL; | |
920 | if (sctp_verify_addr(sk, addr, af->sockaddr_len)) | |
921 | return -EINVAL; | |
922 | ||
923 | if (addrw->state == SCTP_ADDR_NEW) | |
924 | return sctp_send_asconf_add_ip(sk, (struct sockaddr *)addr, 1); | |
925 | else | |
926 | return sctp_send_asconf_del_ip(sk, (struct sockaddr *)addr, 1); | |
927 | } | |
928 | ||
1da177e4 LT |
929 | /* Helper for tunneling sctp_bindx() requests through sctp_setsockopt() |
930 | * | |
931 | * API 8.1 | |
932 | * int sctp_bindx(int sd, struct sockaddr *addrs, int addrcnt, | |
933 | * int flags); | |
934 | * | |
935 | * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses. | |
936 | * If the sd is an IPv6 socket, the addresses passed can either be IPv4 | |
937 | * or IPv6 addresses. | |
938 | * | |
939 | * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see | |
940 | * Section 3.1.2 for this usage. | |
941 | * | |
942 | * addrs is a pointer to an array of one or more socket addresses. Each | |
943 | * address is contained in its appropriate structure (i.e. struct | |
944 | * sockaddr_in or struct sockaddr_in6) the family of the address type | |
23c435f7 | 945 | * must be used to distinguish the address length (note that this |
1da177e4 LT |
946 | * representation is termed a "packed array" of addresses). The caller |
947 | * specifies the number of addresses in the array with addrcnt. | |
948 | * | |
949 | * On success, sctp_bindx() returns 0. On failure, sctp_bindx() returns | |
950 | * -1, and sets errno to the appropriate error code. | |
951 | * | |
952 | * For SCTP, the port given in each socket address must be the same, or | |
953 | * sctp_bindx() will fail, setting errno to EINVAL. | |
954 | * | |
955 | * The flags parameter is formed from the bitwise OR of zero or more of | |
956 | * the following currently defined flags: | |
957 | * | |
958 | * SCTP_BINDX_ADD_ADDR | |
959 | * | |
960 | * SCTP_BINDX_REM_ADDR | |
961 | * | |
962 | * SCTP_BINDX_ADD_ADDR directs SCTP to add the given addresses to the | |
963 | * association, and SCTP_BINDX_REM_ADDR directs SCTP to remove the given | |
964 | * addresses from the association. The two flags are mutually exclusive; | |
965 | * if both are given, sctp_bindx() will fail with EINVAL. A caller may | |
966 | * not remove all addresses from an association; sctp_bindx() will | |
967 | * reject such an attempt with EINVAL. | |
968 | * | |
969 | * An application can use sctp_bindx(SCTP_BINDX_ADD_ADDR) to associate | |
970 | * additional addresses with an endpoint after calling bind(). Or use | |
971 | * sctp_bindx(SCTP_BINDX_REM_ADDR) to remove some addresses a listening | |
972 | * socket is associated with so that no new association accepted will be | |
973 | * associated with those addresses. If the endpoint supports dynamic | |
974 | * address a SCTP_BINDX_REM_ADDR or SCTP_BINDX_ADD_ADDR may cause a | |
975 | * endpoint to send the appropriate message to the peer to change the | |
976 | * peers address lists. | |
977 | * | |
978 | * Adding and removing addresses from a connected association is | |
979 | * optional functionality. Implementations that do not support this | |
980 | * functionality should return EOPNOTSUPP. | |
981 | * | |
982 | * Basically do nothing but copying the addresses from user to kernel | |
983 | * land and invoking either sctp_bindx_add() or sctp_bindx_rem() on the sk. | |
3f7a87d2 FF |
984 | * This is used for tunneling the sctp_bindx() request through sctp_setsockopt() |
985 | * from userspace. | |
1da177e4 | 986 | * |
1da177e4 LT |
987 | * On exit there is no need to do sockfd_put(), sys_setsockopt() does |
988 | * it. | |
989 | * | |
990 | * sk The sk of the socket | |
991 | * addrs The pointer to the addresses in user land | |
992 | * addrssize Size of the addrs buffer | |
993 | * op Operation to perform (add or remove, see the flags of | |
994 | * sctp_bindx) | |
995 | * | |
996 | * Returns 0 if ok, <0 errno code on error. | |
997 | */ | |
26ac8e5f | 998 | static int sctp_setsockopt_bindx(struct sock *sk, |
dda91928 DB |
999 | struct sockaddr __user *addrs, |
1000 | int addrs_size, int op) | |
1da177e4 LT |
1001 | { |
1002 | struct sockaddr *kaddrs; | |
1003 | int err; | |
1004 | int addrcnt = 0; | |
1005 | int walk_size = 0; | |
1006 | struct sockaddr *sa_addr; | |
1007 | void *addr_buf; | |
1008 | struct sctp_af *af; | |
1009 | ||
bb33381d DB |
1010 | pr_debug("%s: sk:%p addrs:%p addrs_size:%d opt:%d\n", |
1011 | __func__, sk, addrs, addrs_size, op); | |
1da177e4 LT |
1012 | |
1013 | if (unlikely(addrs_size <= 0)) | |
1014 | return -EINVAL; | |
1015 | ||
c981f254 AV |
1016 | kaddrs = vmemdup_user(addrs, addrs_size); |
1017 | if (unlikely(IS_ERR(kaddrs))) | |
1018 | return PTR_ERR(kaddrs); | |
1da177e4 | 1019 | |
d808ad9a | 1020 | /* Walk through the addrs buffer and count the number of addresses. */ |
1da177e4 LT |
1021 | addr_buf = kaddrs; |
1022 | while (walk_size < addrs_size) { | |
d7e0d19a | 1023 | if (walk_size + sizeof(sa_family_t) > addrs_size) { |
c981f254 | 1024 | kvfree(kaddrs); |
d7e0d19a DR |
1025 | return -EINVAL; |
1026 | } | |
1027 | ||
ea110733 | 1028 | sa_addr = addr_buf; |
1da177e4 LT |
1029 | af = sctp_get_af_specific(sa_addr->sa_family); |
1030 | ||
1031 | /* If the address family is not supported or if this address | |
1032 | * causes the address buffer to overflow return EINVAL. | |
d808ad9a | 1033 | */ |
1da177e4 | 1034 | if (!af || (walk_size + af->sockaddr_len) > addrs_size) { |
c981f254 | 1035 | kvfree(kaddrs); |
1da177e4 LT |
1036 | return -EINVAL; |
1037 | } | |
1038 | addrcnt++; | |
1039 | addr_buf += af->sockaddr_len; | |
1040 | walk_size += af->sockaddr_len; | |
1041 | } | |
1042 | ||
1043 | /* Do the work. */ | |
1044 | switch (op) { | |
1045 | case SCTP_BINDX_ADD_ADDR: | |
1046 | err = sctp_bindx_add(sk, kaddrs, addrcnt); | |
1047 | if (err) | |
1048 | goto out; | |
1049 | err = sctp_send_asconf_add_ip(sk, kaddrs, addrcnt); | |
1050 | break; | |
1051 | ||
1052 | case SCTP_BINDX_REM_ADDR: | |
1053 | err = sctp_bindx_rem(sk, kaddrs, addrcnt); | |
1054 | if (err) | |
1055 | goto out; | |
1056 | err = sctp_send_asconf_del_ip(sk, kaddrs, addrcnt); | |
1057 | break; | |
1058 | ||
1059 | default: | |
1060 | err = -EINVAL; | |
1061 | break; | |
3ff50b79 | 1062 | } |
1da177e4 LT |
1063 | |
1064 | out: | |
c981f254 | 1065 | kvfree(kaddrs); |
1da177e4 LT |
1066 | |
1067 | return err; | |
1068 | } | |
1069 | ||
3f7a87d2 FF |
1070 | /* __sctp_connect(struct sock* sk, struct sockaddr *kaddrs, int addrs_size) |
1071 | * | |
1072 | * Common routine for handling connect() and sctp_connectx(). | |
1073 | * Connect will come in with just a single address. | |
1074 | */ | |
26ac8e5f | 1075 | static int __sctp_connect(struct sock *sk, |
3f7a87d2 | 1076 | struct sockaddr *kaddrs, |
88a0a948 VY |
1077 | int addrs_size, |
1078 | sctp_assoc_t *assoc_id) | |
3f7a87d2 | 1079 | { |
55e26eb9 | 1080 | struct net *net = sock_net(sk); |
3f7a87d2 FF |
1081 | struct sctp_sock *sp; |
1082 | struct sctp_endpoint *ep; | |
1083 | struct sctp_association *asoc = NULL; | |
1084 | struct sctp_association *asoc2; | |
1085 | struct sctp_transport *transport; | |
1086 | union sctp_addr to; | |
1c662018 | 1087 | enum sctp_scope scope; |
3f7a87d2 FF |
1088 | long timeo; |
1089 | int err = 0; | |
1090 | int addrcnt = 0; | |
1091 | int walk_size = 0; | |
e4d1feab | 1092 | union sctp_addr *sa_addr = NULL; |
3f7a87d2 | 1093 | void *addr_buf; |
16d00fb7 | 1094 | unsigned short port; |
f50f95ca | 1095 | unsigned int f_flags = 0; |
3f7a87d2 FF |
1096 | |
1097 | sp = sctp_sk(sk); | |
1098 | ep = sp->ep; | |
1099 | ||
1100 | /* connect() cannot be done on a socket that is already in ESTABLISHED | |
1101 | * state - UDP-style peeled off socket or a TCP-style socket that | |
1102 | * is already connected. | |
1103 | * It cannot be done even on a TCP-style listening socket. | |
1104 | */ | |
e5b13f34 | 1105 | if (sctp_sstate(sk, ESTABLISHED) || sctp_sstate(sk, CLOSING) || |
3f7a87d2 FF |
1106 | (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))) { |
1107 | err = -EISCONN; | |
1108 | goto out_free; | |
1109 | } | |
1110 | ||
1111 | /* Walk through the addrs buffer and count the number of addresses. */ | |
1112 | addr_buf = kaddrs; | |
1113 | while (walk_size < addrs_size) { | |
299ee123 JG |
1114 | struct sctp_af *af; |
1115 | ||
d7e0d19a DR |
1116 | if (walk_size + sizeof(sa_family_t) > addrs_size) { |
1117 | err = -EINVAL; | |
1118 | goto out_free; | |
1119 | } | |
1120 | ||
ea110733 | 1121 | sa_addr = addr_buf; |
4bdf4b5f | 1122 | af = sctp_get_af_specific(sa_addr->sa.sa_family); |
3f7a87d2 FF |
1123 | |
1124 | /* If the address family is not supported or if this address | |
1125 | * causes the address buffer to overflow return EINVAL. | |
1126 | */ | |
1127 | if (!af || (walk_size + af->sockaddr_len) > addrs_size) { | |
1128 | err = -EINVAL; | |
1129 | goto out_free; | |
1130 | } | |
1131 | ||
d7e0d19a DR |
1132 | port = ntohs(sa_addr->v4.sin_port); |
1133 | ||
e4d1feab VY |
1134 | /* Save current address so we can work with it */ |
1135 | memcpy(&to, sa_addr, af->sockaddr_len); | |
1136 | ||
1137 | err = sctp_verify_addr(sk, &to, af->sockaddr_len); | |
3f7a87d2 FF |
1138 | if (err) |
1139 | goto out_free; | |
1140 | ||
16d00fb7 VY |
1141 | /* Make sure the destination port is correctly set |
1142 | * in all addresses. | |
1143 | */ | |
524fba6c WY |
1144 | if (asoc && asoc->peer.port && asoc->peer.port != port) { |
1145 | err = -EINVAL; | |
16d00fb7 | 1146 | goto out_free; |
524fba6c | 1147 | } |
3f7a87d2 FF |
1148 | |
1149 | /* Check if there already is a matching association on the | |
1150 | * endpoint (other than the one created here). | |
1151 | */ | |
e4d1feab | 1152 | asoc2 = sctp_endpoint_lookup_assoc(ep, &to, &transport); |
3f7a87d2 FF |
1153 | if (asoc2 && asoc2 != asoc) { |
1154 | if (asoc2->state >= SCTP_STATE_ESTABLISHED) | |
1155 | err = -EISCONN; | |
1156 | else | |
1157 | err = -EALREADY; | |
1158 | goto out_free; | |
1159 | } | |
1160 | ||
1161 | /* If we could not find a matching association on the endpoint, | |
1162 | * make sure that there is no peeled-off association matching | |
1163 | * the peer address even on another socket. | |
1164 | */ | |
e4d1feab | 1165 | if (sctp_endpoint_is_peeled_off(ep, &to)) { |
3f7a87d2 FF |
1166 | err = -EADDRNOTAVAIL; |
1167 | goto out_free; | |
1168 | } | |
1169 | ||
1170 | if (!asoc) { | |
1171 | /* If a bind() or sctp_bindx() is not called prior to | |
1172 | * an sctp_connectx() call, the system picks an | |
1173 | * ephemeral port and will choose an address set | |
1174 | * equivalent to binding with a wildcard address. | |
1175 | */ | |
1176 | if (!ep->base.bind_addr.port) { | |
1177 | if (sctp_autobind(sk)) { | |
1178 | err = -EAGAIN; | |
1179 | goto out_free; | |
1180 | } | |
64a0c1c8 ISJ |
1181 | } else { |
1182 | /* | |
d808ad9a YH |
1183 | * If an unprivileged user inherits a 1-many |
1184 | * style socket with open associations on a | |
1185 | * privileged port, it MAY be permitted to | |
1186 | * accept new associations, but it SHOULD NOT | |
64a0c1c8 ISJ |
1187 | * be permitted to open new associations. |
1188 | */ | |
4548b683 KJ |
1189 | if (ep->base.bind_addr.port < |
1190 | inet_prot_sock(net) && | |
1191 | !ns_capable(net->user_ns, | |
1192 | CAP_NET_BIND_SERVICE)) { | |
64a0c1c8 ISJ |
1193 | err = -EACCES; |
1194 | goto out_free; | |
1195 | } | |
3f7a87d2 FF |
1196 | } |
1197 | ||
e4d1feab | 1198 | scope = sctp_scope(&to); |
3f7a87d2 FF |
1199 | asoc = sctp_association_new(ep, sk, scope, GFP_KERNEL); |
1200 | if (!asoc) { | |
1201 | err = -ENOMEM; | |
1202 | goto out_free; | |
1203 | } | |
409b95af VY |
1204 | |
1205 | err = sctp_assoc_set_bind_addr_from_ep(asoc, scope, | |
1206 | GFP_KERNEL); | |
1207 | if (err < 0) { | |
1208 | goto out_free; | |
1209 | } | |
1210 | ||
3f7a87d2 FF |
1211 | } |
1212 | ||
1213 | /* Prime the peer's transport structures. */ | |
e4d1feab | 1214 | transport = sctp_assoc_add_peer(asoc, &to, GFP_KERNEL, |
3f7a87d2 FF |
1215 | SCTP_UNKNOWN); |
1216 | if (!transport) { | |
1217 | err = -ENOMEM; | |
1218 | goto out_free; | |
1219 | } | |
1220 | ||
1221 | addrcnt++; | |
1222 | addr_buf += af->sockaddr_len; | |
1223 | walk_size += af->sockaddr_len; | |
1224 | } | |
1225 | ||
c6ba68a2 VY |
1226 | /* In case the user of sctp_connectx() wants an association |
1227 | * id back, assign one now. | |
1228 | */ | |
1229 | if (assoc_id) { | |
1230 | err = sctp_assoc_set_id(asoc, GFP_KERNEL); | |
1231 | if (err < 0) | |
1232 | goto out_free; | |
1233 | } | |
1234 | ||
55e26eb9 | 1235 | err = sctp_primitive_ASSOCIATE(net, asoc, NULL); |
3f7a87d2 FF |
1236 | if (err < 0) { |
1237 | goto out_free; | |
1238 | } | |
1239 | ||
1240 | /* Initialize sk's dport and daddr for getpeername() */ | |
c720c7e8 | 1241 | inet_sk(sk)->inet_dport = htons(asoc->peer.port); |
299ee123 | 1242 | sp->pf->to_sk_daddr(sa_addr, sk); |
8de8c873 | 1243 | sk->sk_err = 0; |
3f7a87d2 | 1244 | |
f50f95ca VY |
1245 | /* in-kernel sockets don't generally have a file allocated to them |
1246 | * if all they do is call sock_create_kern(). | |
1247 | */ | |
1248 | if (sk->sk_socket->file) | |
1249 | f_flags = sk->sk_socket->file->f_flags; | |
1250 | ||
1251 | timeo = sock_sndtimeo(sk, f_flags & O_NONBLOCK); | |
1252 | ||
7233bc84 | 1253 | if (assoc_id) |
88a0a948 | 1254 | *assoc_id = asoc->assoc_id; |
7233bc84 MRL |
1255 | err = sctp_wait_for_connect(asoc, &timeo); |
1256 | /* Note: the asoc may be freed after the return of | |
1257 | * sctp_wait_for_connect. | |
1258 | */ | |
3f7a87d2 FF |
1259 | |
1260 | /* Don't free association on exit. */ | |
1261 | asoc = NULL; | |
1262 | ||
1263 | out_free: | |
bb33381d DB |
1264 | pr_debug("%s: took out_free path with asoc:%p kaddrs:%p err:%d\n", |
1265 | __func__, asoc, kaddrs, err); | |
3f7a87d2 | 1266 | |
2eebc1e1 NH |
1267 | if (asoc) { |
1268 | /* sctp_primitive_ASSOCIATE may have added this association | |
1269 | * To the hash table, try to unhash it, just in case, its a noop | |
1270 | * if it wasn't hashed so we're safe | |
1271 | */ | |
3f7a87d2 | 1272 | sctp_association_free(asoc); |
2eebc1e1 | 1273 | } |
3f7a87d2 FF |
1274 | return err; |
1275 | } | |
1276 | ||
1277 | /* Helper for tunneling sctp_connectx() requests through sctp_setsockopt() | |
1278 | * | |
1279 | * API 8.9 | |
88a0a948 VY |
1280 | * int sctp_connectx(int sd, struct sockaddr *addrs, int addrcnt, |
1281 | * sctp_assoc_t *asoc); | |
3f7a87d2 FF |
1282 | * |
1283 | * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses. | |
1284 | * If the sd is an IPv6 socket, the addresses passed can either be IPv4 | |
1285 | * or IPv6 addresses. | |
1286 | * | |
1287 | * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see | |
1288 | * Section 3.1.2 for this usage. | |
1289 | * | |
1290 | * addrs is a pointer to an array of one or more socket addresses. Each | |
1291 | * address is contained in its appropriate structure (i.e. struct | |
1292 | * sockaddr_in or struct sockaddr_in6) the family of the address type | |
1293 | * must be used to distengish the address length (note that this | |
1294 | * representation is termed a "packed array" of addresses). The caller | |
1295 | * specifies the number of addresses in the array with addrcnt. | |
1296 | * | |
88a0a948 VY |
1297 | * On success, sctp_connectx() returns 0. It also sets the assoc_id to |
1298 | * the association id of the new association. On failure, sctp_connectx() | |
1299 | * returns -1, and sets errno to the appropriate error code. The assoc_id | |
1300 | * is not touched by the kernel. | |
3f7a87d2 FF |
1301 | * |
1302 | * For SCTP, the port given in each socket address must be the same, or | |
1303 | * sctp_connectx() will fail, setting errno to EINVAL. | |
1304 | * | |
1305 | * An application can use sctp_connectx to initiate an association with | |
1306 | * an endpoint that is multi-homed. Much like sctp_bindx() this call | |
1307 | * allows a caller to specify multiple addresses at which a peer can be | |
1308 | * reached. The way the SCTP stack uses the list of addresses to set up | |
25985edc | 1309 | * the association is implementation dependent. This function only |
3f7a87d2 FF |
1310 | * specifies that the stack will try to make use of all the addresses in |
1311 | * the list when needed. | |
1312 | * | |
1313 | * Note that the list of addresses passed in is only used for setting up | |
1314 | * the association. It does not necessarily equal the set of addresses | |
1315 | * the peer uses for the resulting association. If the caller wants to | |
1316 | * find out the set of peer addresses, it must use sctp_getpaddrs() to | |
1317 | * retrieve them after the association has been set up. | |
1318 | * | |
1319 | * Basically do nothing but copying the addresses from user to kernel | |
1320 | * land and invoking either sctp_connectx(). This is used for tunneling | |
1321 | * the sctp_connectx() request through sctp_setsockopt() from userspace. | |
1322 | * | |
3f7a87d2 FF |
1323 | * On exit there is no need to do sockfd_put(), sys_setsockopt() does |
1324 | * it. | |
1325 | * | |
1326 | * sk The sk of the socket | |
1327 | * addrs The pointer to the addresses in user land | |
1328 | * addrssize Size of the addrs buffer | |
1329 | * | |
88a0a948 | 1330 | * Returns >=0 if ok, <0 errno code on error. |
3f7a87d2 | 1331 | */ |
26ac8e5f | 1332 | static int __sctp_setsockopt_connectx(struct sock *sk, |
3f7a87d2 | 1333 | struct sockaddr __user *addrs, |
88a0a948 VY |
1334 | int addrs_size, |
1335 | sctp_assoc_t *assoc_id) | |
3f7a87d2 | 1336 | { |
3f7a87d2 | 1337 | struct sockaddr *kaddrs; |
9ba0b963 | 1338 | int err = 0; |
3f7a87d2 | 1339 | |
bb33381d DB |
1340 | pr_debug("%s: sk:%p addrs:%p addrs_size:%d\n", |
1341 | __func__, sk, addrs, addrs_size); | |
3f7a87d2 FF |
1342 | |
1343 | if (unlikely(addrs_size <= 0)) | |
1344 | return -EINVAL; | |
1345 | ||
c981f254 AV |
1346 | kaddrs = vmemdup_user(addrs, addrs_size); |
1347 | if (unlikely(IS_ERR(kaddrs))) | |
1348 | return PTR_ERR(kaddrs); | |
3f7a87d2 | 1349 | |
c981f254 AV |
1350 | err = __sctp_connect(sk, kaddrs, addrs_size, assoc_id); |
1351 | kvfree(kaddrs); | |
88a0a948 | 1352 | |
3f7a87d2 FF |
1353 | return err; |
1354 | } | |
1355 | ||
88a0a948 VY |
1356 | /* |
1357 | * This is an older interface. It's kept for backward compatibility | |
1358 | * to the option that doesn't provide association id. | |
1359 | */ | |
26ac8e5f | 1360 | static int sctp_setsockopt_connectx_old(struct sock *sk, |
dda91928 DB |
1361 | struct sockaddr __user *addrs, |
1362 | int addrs_size) | |
88a0a948 VY |
1363 | { |
1364 | return __sctp_setsockopt_connectx(sk, addrs, addrs_size, NULL); | |
1365 | } | |
1366 | ||
1367 | /* | |
1368 | * New interface for the API. The since the API is done with a socket | |
1369 | * option, to make it simple we feed back the association id is as a return | |
1370 | * indication to the call. Error is always negative and association id is | |
1371 | * always positive. | |
1372 | */ | |
26ac8e5f | 1373 | static int sctp_setsockopt_connectx(struct sock *sk, |
dda91928 DB |
1374 | struct sockaddr __user *addrs, |
1375 | int addrs_size) | |
88a0a948 VY |
1376 | { |
1377 | sctp_assoc_t assoc_id = 0; | |
1378 | int err = 0; | |
1379 | ||
1380 | err = __sctp_setsockopt_connectx(sk, addrs, addrs_size, &assoc_id); | |
1381 | ||
1382 | if (err) | |
1383 | return err; | |
1384 | else | |
1385 | return assoc_id; | |
1386 | } | |
1387 | ||
c6ba68a2 | 1388 | /* |
f9c67811 VY |
1389 | * New (hopefully final) interface for the API. |
1390 | * We use the sctp_getaddrs_old structure so that use-space library | |
ffd59393 | 1391 | * can avoid any unnecessary allocations. The only different part |
f9c67811 | 1392 | * is that we store the actual length of the address buffer into the |
ffd59393 | 1393 | * addrs_num structure member. That way we can re-use the existing |
f9c67811 | 1394 | * code. |
c6ba68a2 | 1395 | */ |
ffd59393 DB |
1396 | #ifdef CONFIG_COMPAT |
1397 | struct compat_sctp_getaddrs_old { | |
1398 | sctp_assoc_t assoc_id; | |
1399 | s32 addr_num; | |
1400 | compat_uptr_t addrs; /* struct sockaddr * */ | |
1401 | }; | |
1402 | #endif | |
1403 | ||
26ac8e5f | 1404 | static int sctp_getsockopt_connectx3(struct sock *sk, int len, |
dda91928 DB |
1405 | char __user *optval, |
1406 | int __user *optlen) | |
c6ba68a2 | 1407 | { |
f9c67811 | 1408 | struct sctp_getaddrs_old param; |
c6ba68a2 VY |
1409 | sctp_assoc_t assoc_id = 0; |
1410 | int err = 0; | |
1411 | ||
ffd59393 | 1412 | #ifdef CONFIG_COMPAT |
96c0e0a9 | 1413 | if (in_compat_syscall()) { |
ffd59393 | 1414 | struct compat_sctp_getaddrs_old param32; |
c6ba68a2 | 1415 | |
ffd59393 DB |
1416 | if (len < sizeof(param32)) |
1417 | return -EINVAL; | |
1418 | if (copy_from_user(¶m32, optval, sizeof(param32))) | |
1419 | return -EFAULT; | |
f9c67811 | 1420 | |
ffd59393 DB |
1421 | param.assoc_id = param32.assoc_id; |
1422 | param.addr_num = param32.addr_num; | |
1423 | param.addrs = compat_ptr(param32.addrs); | |
1424 | } else | |
1425 | #endif | |
1426 | { | |
1427 | if (len < sizeof(param)) | |
1428 | return -EINVAL; | |
1429 | if (copy_from_user(¶m, optval, sizeof(param))) | |
1430 | return -EFAULT; | |
1431 | } | |
c6ba68a2 | 1432 | |
ffd59393 DB |
1433 | err = __sctp_setsockopt_connectx(sk, (struct sockaddr __user *) |
1434 | param.addrs, param.addr_num, | |
1435 | &assoc_id); | |
c6ba68a2 VY |
1436 | if (err == 0 || err == -EINPROGRESS) { |
1437 | if (copy_to_user(optval, &assoc_id, sizeof(assoc_id))) | |
1438 | return -EFAULT; | |
1439 | if (put_user(sizeof(assoc_id), optlen)) | |
1440 | return -EFAULT; | |
1441 | } | |
1442 | ||
1443 | return err; | |
1444 | } | |
1445 | ||
1da177e4 LT |
1446 | /* API 3.1.4 close() - UDP Style Syntax |
1447 | * Applications use close() to perform graceful shutdown (as described in | |
1448 | * Section 10.1 of [SCTP]) on ALL the associations currently represented | |
1449 | * by a UDP-style socket. | |
1450 | * | |
1451 | * The syntax is | |
1452 | * | |
1453 | * ret = close(int sd); | |
1454 | * | |
1455 | * sd - the socket descriptor of the associations to be closed. | |
1456 | * | |
1457 | * To gracefully shutdown a specific association represented by the | |
1458 | * UDP-style socket, an application should use the sendmsg() call, | |
1459 | * passing no user data, but including the appropriate flag in the | |
1460 | * ancillary data (see Section xxxx). | |
1461 | * | |
1462 | * If sd in the close() call is a branched-off socket representing only | |
1463 | * one association, the shutdown is performed on that association only. | |
1464 | * | |
1465 | * 4.1.6 close() - TCP Style Syntax | |
1466 | * | |
1467 | * Applications use close() to gracefully close down an association. | |
1468 | * | |
1469 | * The syntax is: | |
1470 | * | |
1471 | * int close(int sd); | |
1472 | * | |
1473 | * sd - the socket descriptor of the association to be closed. | |
1474 | * | |
1475 | * After an application calls close() on a socket descriptor, no further | |
1476 | * socket operations will succeed on that descriptor. | |
1477 | * | |
1478 | * API 7.1.4 SO_LINGER | |
1479 | * | |
1480 | * An application using the TCP-style socket can use this option to | |
1481 | * perform the SCTP ABORT primitive. The linger option structure is: | |
1482 | * | |
1483 | * struct linger { | |
1484 | * int l_onoff; // option on/off | |
1485 | * int l_linger; // linger time | |
1486 | * }; | |
1487 | * | |
1488 | * To enable the option, set l_onoff to 1. If the l_linger value is set | |
1489 | * to 0, calling close() is the same as the ABORT primitive. If the | |
1490 | * value is set to a negative value, the setsockopt() call will return | |
1491 | * an error. If the value is set to a positive value linger_time, the | |
1492 | * close() can be blocked for at most linger_time ms. If the graceful | |
1493 | * shutdown phase does not finish during this period, close() will | |
1494 | * return but the graceful shutdown phase continues in the system. | |
1495 | */ | |
dda91928 | 1496 | static void sctp_close(struct sock *sk, long timeout) |
1da177e4 | 1497 | { |
55e26eb9 | 1498 | struct net *net = sock_net(sk); |
1da177e4 LT |
1499 | struct sctp_endpoint *ep; |
1500 | struct sctp_association *asoc; | |
1501 | struct list_head *pos, *temp; | |
cd4fcc70 | 1502 | unsigned int data_was_unread; |
1da177e4 | 1503 | |
bb33381d | 1504 | pr_debug("%s: sk:%p, timeout:%ld\n", __func__, sk, timeout); |
1da177e4 | 1505 | |
6dfe4b97 | 1506 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 | 1507 | sk->sk_shutdown = SHUTDOWN_MASK; |
cbabf463 | 1508 | inet_sk_set_state(sk, SCTP_SS_CLOSING); |
1da177e4 LT |
1509 | |
1510 | ep = sctp_sk(sk)->ep; | |
1511 | ||
cd4fcc70 TG |
1512 | /* Clean up any skbs sitting on the receive queue. */ |
1513 | data_was_unread = sctp_queue_purge_ulpevents(&sk->sk_receive_queue); | |
1514 | data_was_unread += sctp_queue_purge_ulpevents(&sctp_sk(sk)->pd_lobby); | |
1515 | ||
61c9fed4 | 1516 | /* Walk all associations on an endpoint. */ |
1da177e4 LT |
1517 | list_for_each_safe(pos, temp, &ep->asocs) { |
1518 | asoc = list_entry(pos, struct sctp_association, asocs); | |
1519 | ||
1520 | if (sctp_style(sk, TCP)) { | |
1521 | /* A closed association can still be in the list if | |
1522 | * it belongs to a TCP-style listening socket that is | |
1523 | * not yet accepted. If so, free it. If not, send an | |
1524 | * ABORT or SHUTDOWN based on the linger options. | |
1525 | */ | |
1526 | if (sctp_state(asoc, CLOSED)) { | |
1da177e4 | 1527 | sctp_association_free(asoc); |
b89498a1 VY |
1528 | continue; |
1529 | } | |
1530 | } | |
1da177e4 | 1531 | |
cd4fcc70 TG |
1532 | if (data_was_unread || !skb_queue_empty(&asoc->ulpq.lobby) || |
1533 | !skb_queue_empty(&asoc->ulpq.reasm) || | |
13228238 | 1534 | !skb_queue_empty(&asoc->ulpq.reasm_uo) || |
cd4fcc70 | 1535 | (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime)) { |
b9ac8672 SS |
1536 | struct sctp_chunk *chunk; |
1537 | ||
1538 | chunk = sctp_make_abort_user(asoc, NULL, 0); | |
068d8bd3 | 1539 | sctp_primitive_ABORT(net, asoc, chunk); |
b9ac8672 | 1540 | } else |
55e26eb9 | 1541 | sctp_primitive_SHUTDOWN(net, asoc, NULL); |
1da177e4 LT |
1542 | } |
1543 | ||
1da177e4 LT |
1544 | /* On a TCP-style socket, block for at most linger_time if set. */ |
1545 | if (sctp_style(sk, TCP) && timeout) | |
1546 | sctp_wait_for_close(sk, timeout); | |
1547 | ||
1548 | /* This will run the backlog queue. */ | |
048ed4b6 | 1549 | release_sock(sk); |
1da177e4 LT |
1550 | |
1551 | /* Supposedly, no process has access to the socket, but | |
1552 | * the net layers still may. | |
2d45a02d MRL |
1553 | * Also, sctp_destroy_sock() needs to be called with addr_wq_lock |
1554 | * held and that should be grabbed before socket lock. | |
1da177e4 | 1555 | */ |
2d45a02d | 1556 | spin_lock_bh(&net->sctp.addr_wq_lock); |
6dfe4b97 | 1557 | bh_lock_sock_nested(sk); |
1da177e4 LT |
1558 | |
1559 | /* Hold the sock, since sk_common_release() will put sock_put() | |
1560 | * and we have just a little more cleanup. | |
1561 | */ | |
1562 | sock_hold(sk); | |
1563 | sk_common_release(sk); | |
1564 | ||
5bc1d1b4 | 1565 | bh_unlock_sock(sk); |
2d45a02d | 1566 | spin_unlock_bh(&net->sctp.addr_wq_lock); |
1da177e4 LT |
1567 | |
1568 | sock_put(sk); | |
1569 | ||
1570 | SCTP_DBG_OBJCNT_DEC(sock); | |
1571 | } | |
1572 | ||
1573 | /* Handle EPIPE error. */ | |
1574 | static int sctp_error(struct sock *sk, int flags, int err) | |
1575 | { | |
1576 | if (err == -EPIPE) | |
1577 | err = sock_error(sk) ? : -EPIPE; | |
1578 | if (err == -EPIPE && !(flags & MSG_NOSIGNAL)) | |
1579 | send_sig(SIGPIPE, current, 0); | |
1580 | return err; | |
1581 | } | |
1582 | ||
1583 | /* API 3.1.3 sendmsg() - UDP Style Syntax | |
1584 | * | |
1585 | * An application uses sendmsg() and recvmsg() calls to transmit data to | |
1586 | * and receive data from its peer. | |
1587 | * | |
1588 | * ssize_t sendmsg(int socket, const struct msghdr *message, | |
1589 | * int flags); | |
1590 | * | |
1591 | * socket - the socket descriptor of the endpoint. | |
1592 | * message - pointer to the msghdr structure which contains a single | |
1593 | * user message and possibly some ancillary data. | |
1594 | * | |
1595 | * See Section 5 for complete description of the data | |
1596 | * structures. | |
1597 | * | |
1598 | * flags - flags sent or received with the user message, see Section | |
1599 | * 5 for complete description of the flags. | |
1600 | * | |
1601 | * Note: This function could use a rewrite especially when explicit | |
1602 | * connect support comes in. | |
1603 | */ | |
1604 | /* BUG: We do not implement the equivalent of sk_stream_wait_memory(). */ | |
1605 | ||
a05437ac XL |
1606 | static int sctp_msghdr_parse(const struct msghdr *msg, |
1607 | struct sctp_cmsgs *cmsgs); | |
1da177e4 | 1608 | |
2bfd80f9 XL |
1609 | static int sctp_sendmsg_new_asoc(struct sock *sk, __u16 sflags, |
1610 | struct sctp_cmsgs *cmsgs, | |
1611 | union sctp_addr *daddr, | |
1612 | struct sctp_transport **tp) | |
1613 | { | |
1614 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; | |
1615 | struct net *net = sock_net(sk); | |
1616 | struct sctp_association *asoc; | |
1617 | enum sctp_scope scope; | |
1618 | int err = -EINVAL; | |
1619 | ||
1620 | *tp = NULL; | |
1621 | ||
1622 | if (sflags & (SCTP_EOF | SCTP_ABORT)) | |
1623 | return -EINVAL; | |
1624 | ||
1625 | if (sctp_style(sk, TCP) && (sctp_sstate(sk, ESTABLISHED) || | |
1626 | sctp_sstate(sk, CLOSING))) | |
1627 | return -EADDRNOTAVAIL; | |
1628 | ||
1629 | if (sctp_endpoint_is_peeled_off(ep, daddr)) | |
1630 | return -EADDRNOTAVAIL; | |
1631 | ||
1632 | if (!ep->base.bind_addr.port) { | |
1633 | if (sctp_autobind(sk)) | |
1634 | return -EAGAIN; | |
1635 | } else { | |
1636 | if (ep->base.bind_addr.port < inet_prot_sock(net) && | |
1637 | !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE)) | |
1638 | return -EACCES; | |
1639 | } | |
1640 | ||
1641 | scope = sctp_scope(daddr); | |
1642 | ||
1643 | asoc = sctp_association_new(ep, sk, scope, GFP_KERNEL); | |
1644 | if (!asoc) | |
1645 | return -ENOMEM; | |
1646 | ||
1647 | if (sctp_assoc_set_bind_addr_from_ep(asoc, scope, GFP_KERNEL) < 0) { | |
1648 | err = -ENOMEM; | |
1649 | goto free; | |
1650 | } | |
1651 | ||
1652 | if (cmsgs->init) { | |
1653 | struct sctp_initmsg *init = cmsgs->init; | |
1654 | ||
1655 | if (init->sinit_num_ostreams) { | |
1656 | __u16 outcnt = init->sinit_num_ostreams; | |
1657 | ||
1658 | asoc->c.sinit_num_ostreams = outcnt; | |
1659 | /* outcnt has been changed, need to re-init stream */ | |
1660 | err = sctp_stream_init(&asoc->stream, outcnt, 0, | |
1661 | GFP_KERNEL); | |
1662 | if (err) | |
1663 | goto free; | |
1664 | } | |
1665 | ||
1666 | if (init->sinit_max_instreams) | |
1667 | asoc->c.sinit_max_instreams = init->sinit_max_instreams; | |
1668 | ||
1669 | if (init->sinit_max_attempts) | |
1670 | asoc->max_init_attempts = init->sinit_max_attempts; | |
1671 | ||
1672 | if (init->sinit_max_init_timeo) | |
1673 | asoc->max_init_timeo = | |
1674 | msecs_to_jiffies(init->sinit_max_init_timeo); | |
1675 | } | |
1676 | ||
1677 | *tp = sctp_assoc_add_peer(asoc, daddr, GFP_KERNEL, SCTP_UNKNOWN); | |
1678 | if (!*tp) { | |
1679 | err = -ENOMEM; | |
1680 | goto free; | |
1681 | } | |
1682 | ||
1683 | return 0; | |
1684 | ||
1685 | free: | |
1686 | sctp_association_free(asoc); | |
1687 | return err; | |
1688 | } | |
1689 | ||
c2666de1 XL |
1690 | static int sctp_sendmsg_check_sflags(struct sctp_association *asoc, |
1691 | __u16 sflags, struct msghdr *msg, | |
1692 | size_t msg_len) | |
1693 | { | |
1694 | struct sock *sk = asoc->base.sk; | |
1695 | struct net *net = sock_net(sk); | |
1696 | ||
1697 | if (sctp_state(asoc, CLOSED) && sctp_style(sk, TCP)) | |
1698 | return -EPIPE; | |
1699 | ||
1700 | if (sflags & SCTP_EOF) { | |
1701 | pr_debug("%s: shutting down association:%p\n", __func__, asoc); | |
1702 | sctp_primitive_SHUTDOWN(net, asoc, NULL); | |
1703 | ||
1704 | return 0; | |
1705 | } | |
1706 | ||
1707 | if (sflags & SCTP_ABORT) { | |
1708 | struct sctp_chunk *chunk; | |
1709 | ||
1710 | chunk = sctp_make_abort_user(asoc, msg, msg_len); | |
1711 | if (!chunk) | |
1712 | return -ENOMEM; | |
1713 | ||
1714 | pr_debug("%s: aborting association:%p\n", __func__, asoc); | |
1715 | sctp_primitive_ABORT(net, asoc, chunk); | |
1716 | ||
1717 | return 0; | |
1718 | } | |
1719 | ||
1720 | return 1; | |
1721 | } | |
1722 | ||
f84af331 XL |
1723 | static int sctp_sendmsg_to_asoc(struct sctp_association *asoc, |
1724 | struct msghdr *msg, size_t msg_len, | |
1725 | struct sctp_transport *transport, | |
1726 | struct sctp_sndrcvinfo *sinfo) | |
1727 | { | |
1728 | struct sock *sk = asoc->base.sk; | |
1729 | struct net *net = sock_net(sk); | |
1730 | struct sctp_datamsg *datamsg; | |
1731 | bool wait_connect = false; | |
1732 | struct sctp_chunk *chunk; | |
1733 | long timeo; | |
1734 | int err; | |
1735 | ||
1736 | if (sinfo->sinfo_stream >= asoc->stream.outcnt) { | |
1737 | err = -EINVAL; | |
1738 | goto err; | |
1739 | } | |
1740 | ||
1741 | if (unlikely(!asoc->stream.out[sinfo->sinfo_stream].ext)) { | |
1742 | err = sctp_stream_init_ext(&asoc->stream, sinfo->sinfo_stream); | |
1743 | if (err) | |
1744 | goto err; | |
1745 | } | |
1746 | ||
1747 | if (sctp_sk(sk)->disable_fragments && msg_len > asoc->frag_point) { | |
1748 | err = -EMSGSIZE; | |
1749 | goto err; | |
1750 | } | |
1751 | ||
1752 | if (sctp_state(asoc, CLOSED)) { | |
1753 | err = sctp_primitive_ASSOCIATE(net, asoc, NULL); | |
1754 | if (err) | |
1755 | goto err; | |
1756 | ||
1757 | if (sctp_sk(sk)->strm_interleave) { | |
1758 | timeo = sock_sndtimeo(sk, 0); | |
1759 | err = sctp_wait_for_connect(asoc, &timeo); | |
1760 | if (err) | |
1761 | goto err; | |
1762 | } else { | |
1763 | wait_connect = true; | |
1764 | } | |
1765 | ||
1766 | pr_debug("%s: we associated primitively\n", __func__); | |
1767 | } | |
1768 | ||
1769 | if (asoc->pmtu_pending) | |
1770 | sctp_assoc_pending_pmtu(asoc); | |
1771 | ||
1772 | if (sctp_wspace(asoc) < msg_len) | |
1773 | sctp_prsctp_prune(asoc, sinfo, msg_len - sctp_wspace(asoc)); | |
1774 | ||
1775 | if (!sctp_wspace(asoc)) { | |
1776 | timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT); | |
1777 | err = sctp_wait_for_sndbuf(asoc, &timeo, msg_len); | |
1778 | if (err) | |
1779 | goto err; | |
1780 | } | |
1781 | ||
1782 | datamsg = sctp_datamsg_from_user(asoc, sinfo, &msg->msg_iter); | |
1783 | if (IS_ERR(datamsg)) { | |
1784 | err = PTR_ERR(datamsg); | |
1785 | goto err; | |
1786 | } | |
1787 | ||
1788 | asoc->force_delay = !!(msg->msg_flags & MSG_MORE); | |
1789 | ||
1790 | list_for_each_entry(chunk, &datamsg->chunks, frag_list) { | |
1791 | sctp_chunk_hold(chunk); | |
1792 | sctp_set_owner_w(chunk); | |
1793 | chunk->transport = transport; | |
1794 | } | |
1795 | ||
1796 | err = sctp_primitive_SEND(net, asoc, datamsg); | |
1797 | if (err) { | |
1798 | sctp_datamsg_free(datamsg); | |
1799 | goto err; | |
1800 | } | |
1801 | ||
1802 | pr_debug("%s: we sent primitively\n", __func__); | |
1803 | ||
1804 | sctp_datamsg_put(datamsg); | |
1805 | ||
1806 | if (unlikely(wait_connect)) { | |
1807 | timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT); | |
1808 | sctp_wait_for_connect(asoc, &timeo); | |
1809 | } | |
1810 | ||
1811 | err = msg_len; | |
1812 | ||
1813 | err: | |
1814 | return err; | |
1815 | } | |
1816 | ||
becef9b1 XL |
1817 | static union sctp_addr *sctp_sendmsg_get_daddr(struct sock *sk, |
1818 | const struct msghdr *msg, | |
1819 | struct sctp_cmsgs *cmsgs) | |
1820 | { | |
1821 | union sctp_addr *daddr = NULL; | |
1822 | int err; | |
1823 | ||
1824 | if (!sctp_style(sk, UDP_HIGH_BANDWIDTH) && msg->msg_name) { | |
1825 | int len = msg->msg_namelen; | |
1826 | ||
1827 | if (len > sizeof(*daddr)) | |
1828 | len = sizeof(*daddr); | |
1829 | ||
1830 | daddr = (union sctp_addr *)msg->msg_name; | |
1831 | ||
1832 | err = sctp_verify_addr(sk, daddr, len); | |
1833 | if (err) | |
1834 | return ERR_PTR(err); | |
1835 | } | |
1836 | ||
1837 | return daddr; | |
1838 | } | |
1839 | ||
1b784140 | 1840 | static int sctp_sendmsg(struct sock *sk, struct msghdr *msg, size_t msg_len) |
1da177e4 LT |
1841 | { |
1842 | struct sctp_sock *sp; | |
1843 | struct sctp_endpoint *ep; | |
cb3f837b | 1844 | struct sctp_association *new_asoc = NULL, *asoc = NULL; |
1da177e4 | 1845 | struct sctp_transport *transport, *chunk_tp; |
517aa0bc | 1846 | struct sctp_sndrcvinfo default_sinfo; |
1da177e4 LT |
1847 | struct sctp_sndrcvinfo *sinfo; |
1848 | struct sctp_initmsg *sinit; | |
1849 | sctp_assoc_t associd = 0; | |
a05437ac | 1850 | struct sctp_cmsgs cmsgs = { NULL }; |
f84af331 | 1851 | bool fill_sinfo_ttl = false; |
63b94938 | 1852 | __u16 sinfo_flags = 0; |
becef9b1 | 1853 | union sctp_addr *daddr; |
63b94938 | 1854 | int err; |
1da177e4 | 1855 | |
1da177e4 LT |
1856 | err = 0; |
1857 | sp = sctp_sk(sk); | |
1858 | ep = sp->ep; | |
1859 | ||
bb33381d DB |
1860 | pr_debug("%s: sk:%p, msg:%p, msg_len:%zu ep:%p\n", __func__, sk, |
1861 | msg, msg_len, ep); | |
1da177e4 LT |
1862 | |
1863 | /* We cannot send a message over a TCP-style listening socket. */ | |
1864 | if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING)) { | |
1865 | err = -EPIPE; | |
1866 | goto out_nounlock; | |
1867 | } | |
1868 | ||
1869 | /* Parse out the SCTP CMSGs. */ | |
1870 | err = sctp_msghdr_parse(msg, &cmsgs); | |
1da177e4 | 1871 | if (err) { |
bb33381d | 1872 | pr_debug("%s: msghdr parse err:%x\n", __func__, err); |
1da177e4 LT |
1873 | goto out_nounlock; |
1874 | } | |
1875 | ||
becef9b1 XL |
1876 | /* Get daddr from msg */ |
1877 | daddr = sctp_sendmsg_get_daddr(sk, msg, &cmsgs); | |
1878 | if (IS_ERR(daddr)) { | |
1879 | err = PTR_ERR(daddr); | |
1880 | goto out_nounlock; | |
1da177e4 LT |
1881 | } |
1882 | ||
1da177e4 | 1883 | sinit = cmsgs.init; |
63b94938 GOV |
1884 | if (cmsgs.sinfo != NULL) { |
1885 | memset(&default_sinfo, 0, sizeof(default_sinfo)); | |
1886 | default_sinfo.sinfo_stream = cmsgs.sinfo->snd_sid; | |
1887 | default_sinfo.sinfo_flags = cmsgs.sinfo->snd_flags; | |
1888 | default_sinfo.sinfo_ppid = cmsgs.sinfo->snd_ppid; | |
1889 | default_sinfo.sinfo_context = cmsgs.sinfo->snd_context; | |
1890 | default_sinfo.sinfo_assoc_id = cmsgs.sinfo->snd_assoc_id; | |
1da177e4 | 1891 | |
63b94938 GOV |
1892 | sinfo = &default_sinfo; |
1893 | fill_sinfo_ttl = true; | |
1894 | } else { | |
1895 | sinfo = cmsgs.srinfo; | |
1896 | } | |
1897 | /* Did the user specify SNDINFO/SNDRCVINFO? */ | |
1da177e4 LT |
1898 | if (sinfo) { |
1899 | sinfo_flags = sinfo->sinfo_flags; | |
1900 | associd = sinfo->sinfo_assoc_id; | |
1901 | } | |
1902 | ||
bb33381d DB |
1903 | pr_debug("%s: msg_len:%zu, sinfo_flags:0x%x\n", __func__, |
1904 | msg_len, sinfo_flags); | |
1da177e4 | 1905 | |
eaa5c54d ISJ |
1906 | /* SCTP_EOF or SCTP_ABORT cannot be set on a TCP-style socket. */ |
1907 | if (sctp_style(sk, TCP) && (sinfo_flags & (SCTP_EOF | SCTP_ABORT))) { | |
1da177e4 LT |
1908 | err = -EINVAL; |
1909 | goto out_nounlock; | |
1910 | } | |
1911 | ||
eaa5c54d ISJ |
1912 | /* If SCTP_EOF is set, no data can be sent. Disallow sending zero |
1913 | * length messages when SCTP_EOF|SCTP_ABORT is not set. | |
1914 | * If SCTP_ABORT is set, the message length could be non zero with | |
1da177e4 | 1915 | * the msg_iov set to the user abort reason. |
d808ad9a | 1916 | */ |
eaa5c54d ISJ |
1917 | if (((sinfo_flags & SCTP_EOF) && (msg_len > 0)) || |
1918 | (!(sinfo_flags & (SCTP_EOF|SCTP_ABORT)) && (msg_len == 0))) { | |
1da177e4 LT |
1919 | err = -EINVAL; |
1920 | goto out_nounlock; | |
1921 | } | |
1922 | ||
eaa5c54d | 1923 | /* If SCTP_ADDR_OVER is set, there must be an address |
1da177e4 LT |
1924 | * specified in msg_name. |
1925 | */ | |
eaa5c54d | 1926 | if ((sinfo_flags & SCTP_ADDR_OVER) && (!msg->msg_name)) { |
1da177e4 LT |
1927 | err = -EINVAL; |
1928 | goto out_nounlock; | |
1929 | } | |
1930 | ||
1931 | transport = NULL; | |
1932 | ||
bb33381d | 1933 | pr_debug("%s: about to look up association\n", __func__); |
1da177e4 | 1934 | |
048ed4b6 | 1935 | lock_sock(sk); |
1da177e4 LT |
1936 | |
1937 | /* If a msg_name has been specified, assume this is to be used. */ | |
becef9b1 | 1938 | if (daddr) { |
1da177e4 | 1939 | /* Look for a matching association on the endpoint. */ |
becef9b1 | 1940 | asoc = sctp_endpoint_lookup_assoc(ep, daddr, &transport); |
1da177e4 LT |
1941 | } else { |
1942 | asoc = sctp_id2assoc(sk, associd); | |
1943 | if (!asoc) { | |
1944 | err = -EPIPE; | |
1945 | goto out_unlock; | |
1946 | } | |
1947 | } | |
1948 | ||
1949 | if (asoc) { | |
c2666de1 XL |
1950 | err = sctp_sendmsg_check_sflags(asoc, sinfo_flags, msg, |
1951 | msg_len); | |
1952 | if (err <= 0) | |
1da177e4 | 1953 | goto out_unlock; |
1da177e4 LT |
1954 | } |
1955 | ||
1956 | /* Do we need to create the association? */ | |
1957 | if (!asoc) { | |
becef9b1 | 1958 | err = sctp_sendmsg_new_asoc(sk, sinfo_flags, &cmsgs, daddr, |
2bfd80f9 XL |
1959 | &transport); |
1960 | if (err) | |
1da177e4 | 1961 | goto out_unlock; |
1da177e4 | 1962 | |
2bfd80f9 XL |
1963 | asoc = transport->asoc; |
1964 | new_asoc = asoc; | |
1da177e4 LT |
1965 | } |
1966 | ||
1967 | /* ASSERT: we have a valid association at this point. */ | |
bb33381d | 1968 | pr_debug("%s: we have a valid association\n", __func__); |
1da177e4 LT |
1969 | |
1970 | if (!sinfo) { | |
63b94938 GOV |
1971 | /* If the user didn't specify SNDINFO/SNDRCVINFO, make up |
1972 | * one with some defaults. | |
1da177e4 | 1973 | */ |
517aa0bc | 1974 | memset(&default_sinfo, 0, sizeof(default_sinfo)); |
1da177e4 LT |
1975 | default_sinfo.sinfo_stream = asoc->default_stream; |
1976 | default_sinfo.sinfo_flags = asoc->default_flags; | |
1977 | default_sinfo.sinfo_ppid = asoc->default_ppid; | |
1978 | default_sinfo.sinfo_context = asoc->default_context; | |
1979 | default_sinfo.sinfo_timetolive = asoc->default_timetolive; | |
1980 | default_sinfo.sinfo_assoc_id = sctp_assoc2id(asoc); | |
63b94938 | 1981 | |
1da177e4 | 1982 | sinfo = &default_sinfo; |
63b94938 GOV |
1983 | } else if (fill_sinfo_ttl) { |
1984 | /* In case SNDINFO was specified, we still need to fill | |
1985 | * it with a default ttl from the assoc here. | |
1986 | */ | |
1987 | sinfo->sinfo_timetolive = asoc->default_timetolive; | |
1da177e4 LT |
1988 | } |
1989 | ||
1990 | /* API 7.1.7, the sndbuf size per association bounds the | |
1991 | * maximum size of data that can be sent in a single send call. | |
1992 | */ | |
1993 | if (msg_len > sk->sk_sndbuf) { | |
1994 | err = -EMSGSIZE; | |
1995 | goto out_free; | |
1996 | } | |
1997 | ||
1da177e4 LT |
1998 | /* If an address is passed with the sendto/sendmsg call, it is used |
1999 | * to override the primary destination address in the TCP model, or | |
eaa5c54d | 2000 | * when SCTP_ADDR_OVER flag is set in the UDP model. |
1da177e4 | 2001 | */ |
becef9b1 | 2002 | if ((sctp_style(sk, TCP) && daddr) || |
eaa5c54d | 2003 | (sinfo_flags & SCTP_ADDR_OVER)) { |
becef9b1 | 2004 | chunk_tp = sctp_assoc_lookup_paddr(asoc, daddr); |
1da177e4 LT |
2005 | if (!chunk_tp) { |
2006 | err = -EINVAL; | |
2007 | goto out_free; | |
2008 | } | |
2009 | } else | |
2010 | chunk_tp = NULL; | |
2011 | ||
f84af331 XL |
2012 | /* Send msg to the asoc */ |
2013 | err = sctp_sendmsg_to_asoc(asoc, msg, msg_len, chunk_tp, sinfo); | |
1da177e4 LT |
2014 | |
2015 | out_free: | |
f84af331 | 2016 | if (err < 0 && err != -ESRCH && new_asoc) |
1da177e4 LT |
2017 | sctp_association_free(asoc); |
2018 | out_unlock: | |
048ed4b6 | 2019 | release_sock(sk); |
1da177e4 | 2020 | out_nounlock: |
f84af331 | 2021 | return sctp_error(sk, msg->msg_flags, err); |
1da177e4 LT |
2022 | } |
2023 | ||
2024 | /* This is an extended version of skb_pull() that removes the data from the | |
2025 | * start of a skb even when data is spread across the list of skb's in the | |
2026 | * frag_list. len specifies the total amount of data that needs to be removed. | |
2027 | * when 'len' bytes could be removed from the skb, it returns 0. | |
2028 | * If 'len' exceeds the total skb length, it returns the no. of bytes that | |
2029 | * could not be removed. | |
2030 | */ | |
2031 | static int sctp_skb_pull(struct sk_buff *skb, int len) | |
2032 | { | |
2033 | struct sk_buff *list; | |
2034 | int skb_len = skb_headlen(skb); | |
2035 | int rlen; | |
2036 | ||
2037 | if (len <= skb_len) { | |
2038 | __skb_pull(skb, len); | |
2039 | return 0; | |
2040 | } | |
2041 | len -= skb_len; | |
2042 | __skb_pull(skb, skb_len); | |
2043 | ||
1b003be3 | 2044 | skb_walk_frags(skb, list) { |
1da177e4 LT |
2045 | rlen = sctp_skb_pull(list, len); |
2046 | skb->len -= (len-rlen); | |
2047 | skb->data_len -= (len-rlen); | |
2048 | ||
2049 | if (!rlen) | |
2050 | return 0; | |
2051 | ||
2052 | len = rlen; | |
2053 | } | |
2054 | ||
2055 | return len; | |
2056 | } | |
2057 | ||
2058 | /* API 3.1.3 recvmsg() - UDP Style Syntax | |
2059 | * | |
2060 | * ssize_t recvmsg(int socket, struct msghdr *message, | |
2061 | * int flags); | |
2062 | * | |
2063 | * socket - the socket descriptor of the endpoint. | |
2064 | * message - pointer to the msghdr structure which contains a single | |
2065 | * user message and possibly some ancillary data. | |
2066 | * | |
2067 | * See Section 5 for complete description of the data | |
2068 | * structures. | |
2069 | * | |
2070 | * flags - flags sent or received with the user message, see Section | |
2071 | * 5 for complete description of the flags. | |
2072 | */ | |
1b784140 YX |
2073 | static int sctp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, |
2074 | int noblock, int flags, int *addr_len) | |
1da177e4 LT |
2075 | { |
2076 | struct sctp_ulpevent *event = NULL; | |
2077 | struct sctp_sock *sp = sctp_sk(sk); | |
1f45f78f | 2078 | struct sk_buff *skb, *head_skb; |
1da177e4 LT |
2079 | int copied; |
2080 | int err = 0; | |
2081 | int skb_len; | |
2082 | ||
bb33381d DB |
2083 | pr_debug("%s: sk:%p, msghdr:%p, len:%zd, noblock:%d, flags:0x%x, " |
2084 | "addr_len:%p)\n", __func__, sk, msg, len, noblock, flags, | |
2085 | addr_len); | |
1da177e4 | 2086 | |
048ed4b6 | 2087 | lock_sock(sk); |
1da177e4 | 2088 | |
e5b13f34 | 2089 | if (sctp_style(sk, TCP) && !sctp_sstate(sk, ESTABLISHED) && |
e0878694 | 2090 | !sctp_sstate(sk, CLOSING) && !sctp_sstate(sk, CLOSED)) { |
1da177e4 LT |
2091 | err = -ENOTCONN; |
2092 | goto out; | |
2093 | } | |
2094 | ||
2095 | skb = sctp_skb_recv_datagram(sk, flags, noblock, &err); | |
2096 | if (!skb) | |
2097 | goto out; | |
2098 | ||
2099 | /* Get the total length of the skb including any skb's in the | |
2100 | * frag_list. | |
2101 | */ | |
2102 | skb_len = skb->len; | |
2103 | ||
2104 | copied = skb_len; | |
2105 | if (copied > len) | |
2106 | copied = len; | |
2107 | ||
51f3d02b | 2108 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
1da177e4 LT |
2109 | |
2110 | event = sctp_skb2event(skb); | |
2111 | ||
2112 | if (err) | |
2113 | goto out_free; | |
2114 | ||
1f45f78f MRL |
2115 | if (event->chunk && event->chunk->head_skb) |
2116 | head_skb = event->chunk->head_skb; | |
2117 | else | |
2118 | head_skb = skb; | |
2119 | sock_recv_ts_and_drops(msg, sk, head_skb); | |
1da177e4 LT |
2120 | if (sctp_ulpevent_is_notification(event)) { |
2121 | msg->msg_flags |= MSG_NOTIFICATION; | |
2122 | sp->pf->event_msgname(event, msg->msg_name, addr_len); | |
2123 | } else { | |
1f45f78f | 2124 | sp->pf->skb_msgname(head_skb, msg->msg_name, addr_len); |
1da177e4 LT |
2125 | } |
2126 | ||
2347c80f GOV |
2127 | /* Check if we allow SCTP_NXTINFO. */ |
2128 | if (sp->recvnxtinfo) | |
2129 | sctp_ulpevent_read_nxtinfo(event, msg, sk); | |
0d3a421d GOV |
2130 | /* Check if we allow SCTP_RCVINFO. */ |
2131 | if (sp->recvrcvinfo) | |
2132 | sctp_ulpevent_read_rcvinfo(event, msg); | |
1da177e4 LT |
2133 | /* Check if we allow SCTP_SNDRCVINFO. */ |
2134 | if (sp->subscribe.sctp_data_io_event) | |
2135 | sctp_ulpevent_read_sndrcvinfo(event, msg); | |
0d3a421d | 2136 | |
1da177e4 LT |
2137 | err = copied; |
2138 | ||
2139 | /* If skb's length exceeds the user's buffer, update the skb and | |
2140 | * push it back to the receive_queue so that the next call to | |
2141 | * recvmsg() will return the remaining data. Don't set MSG_EOR. | |
2142 | */ | |
2143 | if (skb_len > copied) { | |
2144 | msg->msg_flags &= ~MSG_EOR; | |
2145 | if (flags & MSG_PEEK) | |
2146 | goto out_free; | |
2147 | sctp_skb_pull(skb, copied); | |
2148 | skb_queue_head(&sk->sk_receive_queue, skb); | |
2149 | ||
362d5204 DB |
2150 | /* When only partial message is copied to the user, increase |
2151 | * rwnd by that amount. If all the data in the skb is read, | |
2152 | * rwnd is updated when the event is freed. | |
2153 | */ | |
2154 | if (!sctp_ulpevent_is_notification(event)) | |
2155 | sctp_assoc_rwnd_increase(event->asoc, copied); | |
1da177e4 LT |
2156 | goto out; |
2157 | } else if ((event->msg_flags & MSG_NOTIFICATION) || | |
2158 | (event->msg_flags & MSG_EOR)) | |
2159 | msg->msg_flags |= MSG_EOR; | |
2160 | else | |
2161 | msg->msg_flags &= ~MSG_EOR; | |
2162 | ||
2163 | out_free: | |
2164 | if (flags & MSG_PEEK) { | |
2165 | /* Release the skb reference acquired after peeking the skb in | |
2166 | * sctp_skb_recv_datagram(). | |
2167 | */ | |
2168 | kfree_skb(skb); | |
2169 | } else { | |
2170 | /* Free the event which includes releasing the reference to | |
2171 | * the owner of the skb, freeing the skb and updating the | |
2172 | * rwnd. | |
2173 | */ | |
2174 | sctp_ulpevent_free(event); | |
2175 | } | |
2176 | out: | |
048ed4b6 | 2177 | release_sock(sk); |
1da177e4 LT |
2178 | return err; |
2179 | } | |
2180 | ||
2181 | /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS) | |
2182 | * | |
2183 | * This option is a on/off flag. If enabled no SCTP message | |
2184 | * fragmentation will be performed. Instead if a message being sent | |
2185 | * exceeds the current PMTU size, the message will NOT be sent and | |
2186 | * instead a error will be indicated to the user. | |
2187 | */ | |
2188 | static int sctp_setsockopt_disable_fragments(struct sock *sk, | |
b7058842 DM |
2189 | char __user *optval, |
2190 | unsigned int optlen) | |
1da177e4 LT |
2191 | { |
2192 | int val; | |
2193 | ||
2194 | if (optlen < sizeof(int)) | |
2195 | return -EINVAL; | |
2196 | ||
2197 | if (get_user(val, (int __user *)optval)) | |
2198 | return -EFAULT; | |
2199 | ||
2200 | sctp_sk(sk)->disable_fragments = (val == 0) ? 0 : 1; | |
2201 | ||
2202 | return 0; | |
2203 | } | |
2204 | ||
2205 | static int sctp_setsockopt_events(struct sock *sk, char __user *optval, | |
b7058842 | 2206 | unsigned int optlen) |
1da177e4 | 2207 | { |
94912301 WY |
2208 | struct sctp_association *asoc; |
2209 | struct sctp_ulpevent *event; | |
2210 | ||
7e8616d8 | 2211 | if (optlen > sizeof(struct sctp_event_subscribe)) |
1da177e4 LT |
2212 | return -EINVAL; |
2213 | if (copy_from_user(&sctp_sk(sk)->subscribe, optval, optlen)) | |
2214 | return -EFAULT; | |
94912301 | 2215 | |
bbbea41d | 2216 | /* At the time when a user app subscribes to SCTP_SENDER_DRY_EVENT, |
94912301 WY |
2217 | * if there is no data to be sent or retransmit, the stack will |
2218 | * immediately send up this notification. | |
2219 | */ | |
2220 | if (sctp_ulpevent_type_enabled(SCTP_SENDER_DRY_EVENT, | |
2221 | &sctp_sk(sk)->subscribe)) { | |
2222 | asoc = sctp_id2assoc(sk, 0); | |
2223 | ||
2224 | if (asoc && sctp_outq_is_empty(&asoc->outqueue)) { | |
2225 | event = sctp_ulpevent_make_sender_dry_event(asoc, | |
2e83acb9 | 2226 | GFP_USER | __GFP_NOWARN); |
94912301 WY |
2227 | if (!event) |
2228 | return -ENOMEM; | |
2229 | ||
9162e0ed | 2230 | asoc->stream.si->enqueue_event(&asoc->ulpq, event); |
94912301 WY |
2231 | } |
2232 | } | |
2233 | ||
1da177e4 LT |
2234 | return 0; |
2235 | } | |
2236 | ||
2237 | /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE) | |
2238 | * | |
2239 | * This socket option is applicable to the UDP-style socket only. When | |
2240 | * set it will cause associations that are idle for more than the | |
2241 | * specified number of seconds to automatically close. An association | |
2242 | * being idle is defined an association that has NOT sent or received | |
2243 | * user data. The special value of '0' indicates that no automatic | |
2244 | * close of any associations should be performed. The option expects an | |
2245 | * integer defining the number of seconds of idle time before an | |
2246 | * association is closed. | |
2247 | */ | |
2248 | static int sctp_setsockopt_autoclose(struct sock *sk, char __user *optval, | |
b7058842 | 2249 | unsigned int optlen) |
1da177e4 LT |
2250 | { |
2251 | struct sctp_sock *sp = sctp_sk(sk); | |
9f70f46b | 2252 | struct net *net = sock_net(sk); |
1da177e4 LT |
2253 | |
2254 | /* Applicable to UDP-style socket only */ | |
2255 | if (sctp_style(sk, TCP)) | |
2256 | return -EOPNOTSUPP; | |
2257 | if (optlen != sizeof(int)) | |
2258 | return -EINVAL; | |
2259 | if (copy_from_user(&sp->autoclose, optval, optlen)) | |
2260 | return -EFAULT; | |
2261 | ||
9f70f46b NH |
2262 | if (sp->autoclose > net->sctp.max_autoclose) |
2263 | sp->autoclose = net->sctp.max_autoclose; | |
2264 | ||
1da177e4 LT |
2265 | return 0; |
2266 | } | |
2267 | ||
2268 | /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS) | |
2269 | * | |
2270 | * Applications can enable or disable heartbeats for any peer address of | |
2271 | * an association, modify an address's heartbeat interval, force a | |
2272 | * heartbeat to be sent immediately, and adjust the address's maximum | |
2273 | * number of retransmissions sent before an address is considered | |
2274 | * unreachable. The following structure is used to access and modify an | |
2275 | * address's parameters: | |
2276 | * | |
2277 | * struct sctp_paddrparams { | |
52ccb8e9 FF |
2278 | * sctp_assoc_t spp_assoc_id; |
2279 | * struct sockaddr_storage spp_address; | |
2280 | * uint32_t spp_hbinterval; | |
2281 | * uint16_t spp_pathmaxrxt; | |
2282 | * uint32_t spp_pathmtu; | |
2283 | * uint32_t spp_sackdelay; | |
2284 | * uint32_t spp_flags; | |
2285 | * }; | |
2286 | * | |
2287 | * spp_assoc_id - (one-to-many style socket) This is filled in the | |
2288 | * application, and identifies the association for | |
2289 | * this query. | |
1da177e4 LT |
2290 | * spp_address - This specifies which address is of interest. |
2291 | * spp_hbinterval - This contains the value of the heartbeat interval, | |
52ccb8e9 FF |
2292 | * in milliseconds. If a value of zero |
2293 | * is present in this field then no changes are to | |
2294 | * be made to this parameter. | |
1da177e4 LT |
2295 | * spp_pathmaxrxt - This contains the maximum number of |
2296 | * retransmissions before this address shall be | |
52ccb8e9 FF |
2297 | * considered unreachable. If a value of zero |
2298 | * is present in this field then no changes are to | |
2299 | * be made to this parameter. | |
2300 | * spp_pathmtu - When Path MTU discovery is disabled the value | |
2301 | * specified here will be the "fixed" path mtu. | |
2302 | * Note that if the spp_address field is empty | |
2303 | * then all associations on this address will | |
2304 | * have this fixed path mtu set upon them. | |
2305 | * | |
2306 | * spp_sackdelay - When delayed sack is enabled, this value specifies | |
2307 | * the number of milliseconds that sacks will be delayed | |
2308 | * for. This value will apply to all addresses of an | |
2309 | * association if the spp_address field is empty. Note | |
2310 | * also, that if delayed sack is enabled and this | |
2311 | * value is set to 0, no change is made to the last | |
2312 | * recorded delayed sack timer value. | |
2313 | * | |
2314 | * spp_flags - These flags are used to control various features | |
2315 | * on an association. The flag field may contain | |
2316 | * zero or more of the following options. | |
2317 | * | |
2318 | * SPP_HB_ENABLE - Enable heartbeats on the | |
2319 | * specified address. Note that if the address | |
2320 | * field is empty all addresses for the association | |
2321 | * have heartbeats enabled upon them. | |
2322 | * | |
2323 | * SPP_HB_DISABLE - Disable heartbeats on the | |
2324 | * speicifed address. Note that if the address | |
2325 | * field is empty all addresses for the association | |
2326 | * will have their heartbeats disabled. Note also | |
2327 | * that SPP_HB_ENABLE and SPP_HB_DISABLE are | |
2328 | * mutually exclusive, only one of these two should | |
2329 | * be specified. Enabling both fields will have | |
2330 | * undetermined results. | |
2331 | * | |
2332 | * SPP_HB_DEMAND - Request a user initiated heartbeat | |
2333 | * to be made immediately. | |
2334 | * | |
bdf3092a VY |
2335 | * SPP_HB_TIME_IS_ZERO - Specify's that the time for |
2336 | * heartbeat delayis to be set to the value of 0 | |
2337 | * milliseconds. | |
2338 | * | |
52ccb8e9 FF |
2339 | * SPP_PMTUD_ENABLE - This field will enable PMTU |
2340 | * discovery upon the specified address. Note that | |
2341 | * if the address feild is empty then all addresses | |
2342 | * on the association are effected. | |
2343 | * | |
2344 | * SPP_PMTUD_DISABLE - This field will disable PMTU | |
2345 | * discovery upon the specified address. Note that | |
2346 | * if the address feild is empty then all addresses | |
2347 | * on the association are effected. Not also that | |
2348 | * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually | |
2349 | * exclusive. Enabling both will have undetermined | |
2350 | * results. | |
2351 | * | |
2352 | * SPP_SACKDELAY_ENABLE - Setting this flag turns | |
2353 | * on delayed sack. The time specified in spp_sackdelay | |
2354 | * is used to specify the sack delay for this address. Note | |
2355 | * that if spp_address is empty then all addresses will | |
2356 | * enable delayed sack and take on the sack delay | |
2357 | * value specified in spp_sackdelay. | |
2358 | * SPP_SACKDELAY_DISABLE - Setting this flag turns | |
2359 | * off delayed sack. If the spp_address field is blank then | |
2360 | * delayed sack is disabled for the entire association. Note | |
2361 | * also that this field is mutually exclusive to | |
2362 | * SPP_SACKDELAY_ENABLE, setting both will have undefined | |
2363 | * results. | |
1da177e4 | 2364 | */ |
16164366 AB |
2365 | static int sctp_apply_peer_addr_params(struct sctp_paddrparams *params, |
2366 | struct sctp_transport *trans, | |
2367 | struct sctp_association *asoc, | |
2368 | struct sctp_sock *sp, | |
2369 | int hb_change, | |
2370 | int pmtud_change, | |
2371 | int sackdelay_change) | |
52ccb8e9 FF |
2372 | { |
2373 | int error; | |
2374 | ||
2375 | if (params->spp_flags & SPP_HB_DEMAND && trans) { | |
55e26eb9 EB |
2376 | struct net *net = sock_net(trans->asoc->base.sk); |
2377 | ||
2378 | error = sctp_primitive_REQUESTHEARTBEAT(net, trans->asoc, trans); | |
52ccb8e9 FF |
2379 | if (error) |
2380 | return error; | |
2381 | } | |
2382 | ||
bdf3092a VY |
2383 | /* Note that unless the spp_flag is set to SPP_HB_ENABLE the value of |
2384 | * this field is ignored. Note also that a value of zero indicates | |
2385 | * the current setting should be left unchanged. | |
2386 | */ | |
2387 | if (params->spp_flags & SPP_HB_ENABLE) { | |
2388 | ||
2389 | /* Re-zero the interval if the SPP_HB_TIME_IS_ZERO is | |
2390 | * set. This lets us use 0 value when this flag | |
2391 | * is set. | |
2392 | */ | |
2393 | if (params->spp_flags & SPP_HB_TIME_IS_ZERO) | |
2394 | params->spp_hbinterval = 0; | |
2395 | ||
2396 | if (params->spp_hbinterval || | |
2397 | (params->spp_flags & SPP_HB_TIME_IS_ZERO)) { | |
2398 | if (trans) { | |
2399 | trans->hbinterval = | |
2400 | msecs_to_jiffies(params->spp_hbinterval); | |
2401 | } else if (asoc) { | |
2402 | asoc->hbinterval = | |
2403 | msecs_to_jiffies(params->spp_hbinterval); | |
2404 | } else { | |
2405 | sp->hbinterval = params->spp_hbinterval; | |
2406 | } | |
52ccb8e9 FF |
2407 | } |
2408 | } | |
2409 | ||
2410 | if (hb_change) { | |
2411 | if (trans) { | |
2412 | trans->param_flags = | |
2413 | (trans->param_flags & ~SPP_HB) | hb_change; | |
2414 | } else if (asoc) { | |
2415 | asoc->param_flags = | |
2416 | (asoc->param_flags & ~SPP_HB) | hb_change; | |
2417 | } else { | |
2418 | sp->param_flags = | |
2419 | (sp->param_flags & ~SPP_HB) | hb_change; | |
2420 | } | |
2421 | } | |
2422 | ||
bdf3092a VY |
2423 | /* When Path MTU discovery is disabled the value specified here will |
2424 | * be the "fixed" path mtu (i.e. the value of the spp_flags field must | |
2425 | * include the flag SPP_PMTUD_DISABLE for this field to have any | |
2426 | * effect). | |
2427 | */ | |
2428 | if ((params->spp_flags & SPP_PMTUD_DISABLE) && params->spp_pathmtu) { | |
52ccb8e9 FF |
2429 | if (trans) { |
2430 | trans->pathmtu = params->spp_pathmtu; | |
3ebfdf08 | 2431 | sctp_assoc_sync_pmtu(asoc); |
52ccb8e9 FF |
2432 | } else if (asoc) { |
2433 | asoc->pathmtu = params->spp_pathmtu; | |
52ccb8e9 FF |
2434 | } else { |
2435 | sp->pathmtu = params->spp_pathmtu; | |
2436 | } | |
2437 | } | |
2438 | ||
2439 | if (pmtud_change) { | |
2440 | if (trans) { | |
2441 | int update = (trans->param_flags & SPP_PMTUD_DISABLE) && | |
2442 | (params->spp_flags & SPP_PMTUD_ENABLE); | |
2443 | trans->param_flags = | |
2444 | (trans->param_flags & ~SPP_PMTUD) | pmtud_change; | |
2445 | if (update) { | |
9914ae3c | 2446 | sctp_transport_pmtu(trans, sctp_opt2sk(sp)); |
3ebfdf08 | 2447 | sctp_assoc_sync_pmtu(asoc); |
52ccb8e9 FF |
2448 | } |
2449 | } else if (asoc) { | |
2450 | asoc->param_flags = | |
2451 | (asoc->param_flags & ~SPP_PMTUD) | pmtud_change; | |
2452 | } else { | |
2453 | sp->param_flags = | |
2454 | (sp->param_flags & ~SPP_PMTUD) | pmtud_change; | |
2455 | } | |
2456 | } | |
2457 | ||
bdf3092a VY |
2458 | /* Note that unless the spp_flag is set to SPP_SACKDELAY_ENABLE the |
2459 | * value of this field is ignored. Note also that a value of zero | |
2460 | * indicates the current setting should be left unchanged. | |
2461 | */ | |
2462 | if ((params->spp_flags & SPP_SACKDELAY_ENABLE) && params->spp_sackdelay) { | |
52ccb8e9 FF |
2463 | if (trans) { |
2464 | trans->sackdelay = | |
2465 | msecs_to_jiffies(params->spp_sackdelay); | |
2466 | } else if (asoc) { | |
2467 | asoc->sackdelay = | |
2468 | msecs_to_jiffies(params->spp_sackdelay); | |
2469 | } else { | |
2470 | sp->sackdelay = params->spp_sackdelay; | |
2471 | } | |
2472 | } | |
2473 | ||
2474 | if (sackdelay_change) { | |
2475 | if (trans) { | |
2476 | trans->param_flags = | |
2477 | (trans->param_flags & ~SPP_SACKDELAY) | | |
2478 | sackdelay_change; | |
2479 | } else if (asoc) { | |
2480 | asoc->param_flags = | |
2481 | (asoc->param_flags & ~SPP_SACKDELAY) | | |
2482 | sackdelay_change; | |
2483 | } else { | |
2484 | sp->param_flags = | |
2485 | (sp->param_flags & ~SPP_SACKDELAY) | | |
2486 | sackdelay_change; | |
2487 | } | |
2488 | } | |
2489 | ||
37051f73 APO |
2490 | /* Note that a value of zero indicates the current setting should be |
2491 | left unchanged. | |
bdf3092a | 2492 | */ |
37051f73 | 2493 | if (params->spp_pathmaxrxt) { |
52ccb8e9 FF |
2494 | if (trans) { |
2495 | trans->pathmaxrxt = params->spp_pathmaxrxt; | |
2496 | } else if (asoc) { | |
2497 | asoc->pathmaxrxt = params->spp_pathmaxrxt; | |
2498 | } else { | |
2499 | sp->pathmaxrxt = params->spp_pathmaxrxt; | |
2500 | } | |
2501 | } | |
2502 | ||
2503 | return 0; | |
2504 | } | |
2505 | ||
1da177e4 | 2506 | static int sctp_setsockopt_peer_addr_params(struct sock *sk, |
b7058842 DM |
2507 | char __user *optval, |
2508 | unsigned int optlen) | |
1da177e4 | 2509 | { |
52ccb8e9 FF |
2510 | struct sctp_paddrparams params; |
2511 | struct sctp_transport *trans = NULL; | |
2512 | struct sctp_association *asoc = NULL; | |
2513 | struct sctp_sock *sp = sctp_sk(sk); | |
1da177e4 | 2514 | int error; |
52ccb8e9 | 2515 | int hb_change, pmtud_change, sackdelay_change; |
1da177e4 LT |
2516 | |
2517 | if (optlen != sizeof(struct sctp_paddrparams)) | |
cb3f837b | 2518 | return -EINVAL; |
52ccb8e9 | 2519 | |
1da177e4 LT |
2520 | if (copy_from_user(¶ms, optval, optlen)) |
2521 | return -EFAULT; | |
2522 | ||
52ccb8e9 FF |
2523 | /* Validate flags and value parameters. */ |
2524 | hb_change = params.spp_flags & SPP_HB; | |
2525 | pmtud_change = params.spp_flags & SPP_PMTUD; | |
2526 | sackdelay_change = params.spp_flags & SPP_SACKDELAY; | |
2527 | ||
2528 | if (hb_change == SPP_HB || | |
2529 | pmtud_change == SPP_PMTUD || | |
2530 | sackdelay_change == SPP_SACKDELAY || | |
2531 | params.spp_sackdelay > 500 || | |
f64f9e71 JP |
2532 | (params.spp_pathmtu && |
2533 | params.spp_pathmtu < SCTP_DEFAULT_MINSEGMENT)) | |
52ccb8e9 | 2534 | return -EINVAL; |
1da177e4 | 2535 | |
52ccb8e9 FF |
2536 | /* If an address other than INADDR_ANY is specified, and |
2537 | * no transport is found, then the request is invalid. | |
2538 | */ | |
cb3f837b | 2539 | if (!sctp_is_any(sk, (union sctp_addr *)¶ms.spp_address)) { |
52ccb8e9 FF |
2540 | trans = sctp_addr_id2transport(sk, ¶ms.spp_address, |
2541 | params.spp_assoc_id); | |
2542 | if (!trans) | |
1da177e4 | 2543 | return -EINVAL; |
1da177e4 LT |
2544 | } |
2545 | ||
52ccb8e9 FF |
2546 | /* Get association, if assoc_id != 0 and the socket is a one |
2547 | * to many style socket, and an association was not found, then | |
2548 | * the id was invalid. | |
2549 | */ | |
2550 | asoc = sctp_id2assoc(sk, params.spp_assoc_id); | |
2551 | if (!asoc && params.spp_assoc_id && sctp_style(sk, UDP)) | |
1da177e4 LT |
2552 | return -EINVAL; |
2553 | ||
52ccb8e9 FF |
2554 | /* Heartbeat demand can only be sent on a transport or |
2555 | * association, but not a socket. | |
1da177e4 | 2556 | */ |
52ccb8e9 FF |
2557 | if (params.spp_flags & SPP_HB_DEMAND && !trans && !asoc) |
2558 | return -EINVAL; | |
2559 | ||
2560 | /* Process parameters. */ | |
2561 | error = sctp_apply_peer_addr_params(¶ms, trans, asoc, sp, | |
2562 | hb_change, pmtud_change, | |
2563 | sackdelay_change); | |
1da177e4 | 2564 | |
52ccb8e9 FF |
2565 | if (error) |
2566 | return error; | |
2567 | ||
2568 | /* If changes are for association, also apply parameters to each | |
2569 | * transport. | |
1da177e4 | 2570 | */ |
52ccb8e9 | 2571 | if (!trans && asoc) { |
9dbc15f0 RD |
2572 | list_for_each_entry(trans, &asoc->peer.transport_addr_list, |
2573 | transports) { | |
52ccb8e9 FF |
2574 | sctp_apply_peer_addr_params(¶ms, trans, asoc, sp, |
2575 | hb_change, pmtud_change, | |
2576 | sackdelay_change); | |
2577 | } | |
2578 | } | |
1da177e4 LT |
2579 | |
2580 | return 0; | |
2581 | } | |
2582 | ||
0ea5e4df | 2583 | static inline __u32 sctp_spp_sackdelay_enable(__u32 param_flags) |
2584 | { | |
2585 | return (param_flags & ~SPP_SACKDELAY) | SPP_SACKDELAY_ENABLE; | |
2586 | } | |
2587 | ||
2588 | static inline __u32 sctp_spp_sackdelay_disable(__u32 param_flags) | |
2589 | { | |
2590 | return (param_flags & ~SPP_SACKDELAY) | SPP_SACKDELAY_DISABLE; | |
2591 | } | |
2592 | ||
d364d927 WY |
2593 | /* |
2594 | * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK) | |
2595 | * | |
2596 | * This option will effect the way delayed acks are performed. This | |
2597 | * option allows you to get or set the delayed ack time, in | |
2598 | * milliseconds. It also allows changing the delayed ack frequency. | |
2599 | * Changing the frequency to 1 disables the delayed sack algorithm. If | |
2600 | * the assoc_id is 0, then this sets or gets the endpoints default | |
2601 | * values. If the assoc_id field is non-zero, then the set or get | |
2602 | * effects the specified association for the one to many model (the | |
2603 | * assoc_id field is ignored by the one to one model). Note that if | |
2604 | * sack_delay or sack_freq are 0 when setting this option, then the | |
2605 | * current values will remain unchanged. | |
2606 | * | |
2607 | * struct sctp_sack_info { | |
2608 | * sctp_assoc_t sack_assoc_id; | |
2609 | * uint32_t sack_delay; | |
2610 | * uint32_t sack_freq; | |
2611 | * }; | |
2612 | * | |
2613 | * sack_assoc_id - This parameter, indicates which association the user | |
2614 | * is performing an action upon. Note that if this field's value is | |
2615 | * zero then the endpoints default value is changed (effecting future | |
2616 | * associations only). | |
2617 | * | |
2618 | * sack_delay - This parameter contains the number of milliseconds that | |
2619 | * the user is requesting the delayed ACK timer be set to. Note that | |
2620 | * this value is defined in the standard to be between 200 and 500 | |
2621 | * milliseconds. | |
2622 | * | |
2623 | * sack_freq - This parameter contains the number of packets that must | |
2624 | * be received before a sack is sent without waiting for the delay | |
2625 | * timer to expire. The default value for this is 2, setting this | |
2626 | * value to 1 will disable the delayed sack algorithm. | |
7708610b FF |
2627 | */ |
2628 | ||
d364d927 | 2629 | static int sctp_setsockopt_delayed_ack(struct sock *sk, |
b7058842 | 2630 | char __user *optval, unsigned int optlen) |
7708610b | 2631 | { |
d364d927 | 2632 | struct sctp_sack_info params; |
7708610b FF |
2633 | struct sctp_transport *trans = NULL; |
2634 | struct sctp_association *asoc = NULL; | |
2635 | struct sctp_sock *sp = sctp_sk(sk); | |
2636 | ||
d364d927 WY |
2637 | if (optlen == sizeof(struct sctp_sack_info)) { |
2638 | if (copy_from_user(¶ms, optval, optlen)) | |
2639 | return -EFAULT; | |
7708610b | 2640 | |
d364d927 WY |
2641 | if (params.sack_delay == 0 && params.sack_freq == 0) |
2642 | return 0; | |
2643 | } else if (optlen == sizeof(struct sctp_assoc_value)) { | |
94f65193 | 2644 | pr_warn_ratelimited(DEPRECATED |
f916ec96 | 2645 | "%s (pid %d) " |
94f65193 | 2646 | "Use of struct sctp_assoc_value in delayed_ack socket option.\n" |
f916ec96 NH |
2647 | "Use struct sctp_sack_info instead\n", |
2648 | current->comm, task_pid_nr(current)); | |
d364d927 WY |
2649 | if (copy_from_user(¶ms, optval, optlen)) |
2650 | return -EFAULT; | |
2651 | ||
2652 | if (params.sack_delay == 0) | |
2653 | params.sack_freq = 1; | |
2654 | else | |
2655 | params.sack_freq = 0; | |
2656 | } else | |
cb3f837b | 2657 | return -EINVAL; |
7708610b FF |
2658 | |
2659 | /* Validate value parameter. */ | |
d364d927 | 2660 | if (params.sack_delay > 500) |
7708610b FF |
2661 | return -EINVAL; |
2662 | ||
d364d927 | 2663 | /* Get association, if sack_assoc_id != 0 and the socket is a one |
7708610b FF |
2664 | * to many style socket, and an association was not found, then |
2665 | * the id was invalid. | |
d808ad9a | 2666 | */ |
d364d927 WY |
2667 | asoc = sctp_id2assoc(sk, params.sack_assoc_id); |
2668 | if (!asoc && params.sack_assoc_id && sctp_style(sk, UDP)) | |
7708610b FF |
2669 | return -EINVAL; |
2670 | ||
d364d927 | 2671 | if (params.sack_delay) { |
7708610b FF |
2672 | if (asoc) { |
2673 | asoc->sackdelay = | |
d364d927 | 2674 | msecs_to_jiffies(params.sack_delay); |
d808ad9a | 2675 | asoc->param_flags = |
0ea5e4df | 2676 | sctp_spp_sackdelay_enable(asoc->param_flags); |
7708610b | 2677 | } else { |
d364d927 | 2678 | sp->sackdelay = params.sack_delay; |
d808ad9a | 2679 | sp->param_flags = |
0ea5e4df | 2680 | sctp_spp_sackdelay_enable(sp->param_flags); |
7708610b | 2681 | } |
d364d927 WY |
2682 | } |
2683 | ||
2684 | if (params.sack_freq == 1) { | |
7708610b | 2685 | if (asoc) { |
d808ad9a | 2686 | asoc->param_flags = |
0ea5e4df | 2687 | sctp_spp_sackdelay_disable(asoc->param_flags); |
7708610b | 2688 | } else { |
d808ad9a | 2689 | sp->param_flags = |
0ea5e4df | 2690 | sctp_spp_sackdelay_disable(sp->param_flags); |
7708610b | 2691 | } |
d364d927 WY |
2692 | } else if (params.sack_freq > 1) { |
2693 | if (asoc) { | |
2694 | asoc->sackfreq = params.sack_freq; | |
2695 | asoc->param_flags = | |
0ea5e4df | 2696 | sctp_spp_sackdelay_enable(asoc->param_flags); |
d364d927 WY |
2697 | } else { |
2698 | sp->sackfreq = params.sack_freq; | |
2699 | sp->param_flags = | |
0ea5e4df | 2700 | sctp_spp_sackdelay_enable(sp->param_flags); |
d364d927 | 2701 | } |
7708610b FF |
2702 | } |
2703 | ||
2704 | /* If change is for association, also apply to each transport. */ | |
2705 | if (asoc) { | |
9dbc15f0 RD |
2706 | list_for_each_entry(trans, &asoc->peer.transport_addr_list, |
2707 | transports) { | |
d364d927 | 2708 | if (params.sack_delay) { |
7708610b | 2709 | trans->sackdelay = |
d364d927 | 2710 | msecs_to_jiffies(params.sack_delay); |
d808ad9a | 2711 | trans->param_flags = |
0ea5e4df | 2712 | sctp_spp_sackdelay_enable(trans->param_flags); |
d364d927 | 2713 | } |
7bfe8bdb | 2714 | if (params.sack_freq == 1) { |
d808ad9a | 2715 | trans->param_flags = |
0ea5e4df | 2716 | sctp_spp_sackdelay_disable(trans->param_flags); |
d364d927 WY |
2717 | } else if (params.sack_freq > 1) { |
2718 | trans->sackfreq = params.sack_freq; | |
2719 | trans->param_flags = | |
0ea5e4df | 2720 | sctp_spp_sackdelay_enable(trans->param_flags); |
7708610b FF |
2721 | } |
2722 | } | |
2723 | } | |
d808ad9a | 2724 | |
7708610b FF |
2725 | return 0; |
2726 | } | |
2727 | ||
1da177e4 LT |
2728 | /* 7.1.3 Initialization Parameters (SCTP_INITMSG) |
2729 | * | |
2730 | * Applications can specify protocol parameters for the default association | |
2731 | * initialization. The option name argument to setsockopt() and getsockopt() | |
2732 | * is SCTP_INITMSG. | |
2733 | * | |
2734 | * Setting initialization parameters is effective only on an unconnected | |
2735 | * socket (for UDP-style sockets only future associations are effected | |
2736 | * by the change). With TCP-style sockets, this option is inherited by | |
2737 | * sockets derived from a listener socket. | |
2738 | */ | |
b7058842 | 2739 | static int sctp_setsockopt_initmsg(struct sock *sk, char __user *optval, unsigned int optlen) |
1da177e4 LT |
2740 | { |
2741 | struct sctp_initmsg sinit; | |
2742 | struct sctp_sock *sp = sctp_sk(sk); | |
2743 | ||
2744 | if (optlen != sizeof(struct sctp_initmsg)) | |
2745 | return -EINVAL; | |
2746 | if (copy_from_user(&sinit, optval, optlen)) | |
2747 | return -EFAULT; | |
2748 | ||
2749 | if (sinit.sinit_num_ostreams) | |
d808ad9a | 2750 | sp->initmsg.sinit_num_ostreams = sinit.sinit_num_ostreams; |
1da177e4 | 2751 | if (sinit.sinit_max_instreams) |
d808ad9a | 2752 | sp->initmsg.sinit_max_instreams = sinit.sinit_max_instreams; |
1da177e4 | 2753 | if (sinit.sinit_max_attempts) |
d808ad9a | 2754 | sp->initmsg.sinit_max_attempts = sinit.sinit_max_attempts; |
1da177e4 | 2755 | if (sinit.sinit_max_init_timeo) |
d808ad9a | 2756 | sp->initmsg.sinit_max_init_timeo = sinit.sinit_max_init_timeo; |
1da177e4 LT |
2757 | |
2758 | return 0; | |
2759 | } | |
2760 | ||
2761 | /* | |
2762 | * 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM) | |
2763 | * | |
2764 | * Applications that wish to use the sendto() system call may wish to | |
2765 | * specify a default set of parameters that would normally be supplied | |
2766 | * through the inclusion of ancillary data. This socket option allows | |
2767 | * such an application to set the default sctp_sndrcvinfo structure. | |
2768 | * The application that wishes to use this socket option simply passes | |
2769 | * in to this call the sctp_sndrcvinfo structure defined in Section | |
2770 | * 5.2.2) The input parameters accepted by this call include | |
2771 | * sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context, | |
2772 | * sinfo_timetolive. The user must provide the sinfo_assoc_id field in | |
2773 | * to this call if the caller is using the UDP model. | |
2774 | */ | |
2775 | static int sctp_setsockopt_default_send_param(struct sock *sk, | |
b7058842 DM |
2776 | char __user *optval, |
2777 | unsigned int optlen) | |
1da177e4 | 2778 | { |
1da177e4 | 2779 | struct sctp_sock *sp = sctp_sk(sk); |
6b3fd5f3 GOV |
2780 | struct sctp_association *asoc; |
2781 | struct sctp_sndrcvinfo info; | |
1da177e4 | 2782 | |
6b3fd5f3 | 2783 | if (optlen != sizeof(info)) |
1da177e4 LT |
2784 | return -EINVAL; |
2785 | if (copy_from_user(&info, optval, optlen)) | |
2786 | return -EFAULT; | |
6b3fd5f3 GOV |
2787 | if (info.sinfo_flags & |
2788 | ~(SCTP_UNORDERED | SCTP_ADDR_OVER | | |
2789 | SCTP_ABORT | SCTP_EOF)) | |
2790 | return -EINVAL; | |
1da177e4 LT |
2791 | |
2792 | asoc = sctp_id2assoc(sk, info.sinfo_assoc_id); | |
2793 | if (!asoc && info.sinfo_assoc_id && sctp_style(sk, UDP)) | |
2794 | return -EINVAL; | |
1da177e4 LT |
2795 | if (asoc) { |
2796 | asoc->default_stream = info.sinfo_stream; | |
2797 | asoc->default_flags = info.sinfo_flags; | |
2798 | asoc->default_ppid = info.sinfo_ppid; | |
2799 | asoc->default_context = info.sinfo_context; | |
2800 | asoc->default_timetolive = info.sinfo_timetolive; | |
2801 | } else { | |
2802 | sp->default_stream = info.sinfo_stream; | |
2803 | sp->default_flags = info.sinfo_flags; | |
2804 | sp->default_ppid = info.sinfo_ppid; | |
2805 | sp->default_context = info.sinfo_context; | |
2806 | sp->default_timetolive = info.sinfo_timetolive; | |
2807 | } | |
2808 | ||
2809 | return 0; | |
2810 | } | |
2811 | ||
6b3fd5f3 GOV |
2812 | /* RFC6458, Section 8.1.31. Set/get Default Send Parameters |
2813 | * (SCTP_DEFAULT_SNDINFO) | |
2814 | */ | |
2815 | static int sctp_setsockopt_default_sndinfo(struct sock *sk, | |
2816 | char __user *optval, | |
2817 | unsigned int optlen) | |
2818 | { | |
2819 | struct sctp_sock *sp = sctp_sk(sk); | |
2820 | struct sctp_association *asoc; | |
2821 | struct sctp_sndinfo info; | |
2822 | ||
2823 | if (optlen != sizeof(info)) | |
2824 | return -EINVAL; | |
2825 | if (copy_from_user(&info, optval, optlen)) | |
2826 | return -EFAULT; | |
2827 | if (info.snd_flags & | |
2828 | ~(SCTP_UNORDERED | SCTP_ADDR_OVER | | |
2829 | SCTP_ABORT | SCTP_EOF)) | |
2830 | return -EINVAL; | |
2831 | ||
2832 | asoc = sctp_id2assoc(sk, info.snd_assoc_id); | |
2833 | if (!asoc && info.snd_assoc_id && sctp_style(sk, UDP)) | |
2834 | return -EINVAL; | |
2835 | if (asoc) { | |
2836 | asoc->default_stream = info.snd_sid; | |
2837 | asoc->default_flags = info.snd_flags; | |
2838 | asoc->default_ppid = info.snd_ppid; | |
2839 | asoc->default_context = info.snd_context; | |
2840 | } else { | |
2841 | sp->default_stream = info.snd_sid; | |
2842 | sp->default_flags = info.snd_flags; | |
2843 | sp->default_ppid = info.snd_ppid; | |
2844 | sp->default_context = info.snd_context; | |
2845 | } | |
2846 | ||
2847 | return 0; | |
2848 | } | |
2849 | ||
1da177e4 LT |
2850 | /* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR) |
2851 | * | |
2852 | * Requests that the local SCTP stack use the enclosed peer address as | |
2853 | * the association primary. The enclosed address must be one of the | |
2854 | * association peer's addresses. | |
2855 | */ | |
2856 | static int sctp_setsockopt_primary_addr(struct sock *sk, char __user *optval, | |
b7058842 | 2857 | unsigned int optlen) |
1da177e4 LT |
2858 | { |
2859 | struct sctp_prim prim; | |
2860 | struct sctp_transport *trans; | |
2861 | ||
2862 | if (optlen != sizeof(struct sctp_prim)) | |
2863 | return -EINVAL; | |
2864 | ||
2865 | if (copy_from_user(&prim, optval, sizeof(struct sctp_prim))) | |
2866 | return -EFAULT; | |
2867 | ||
2868 | trans = sctp_addr_id2transport(sk, &prim.ssp_addr, prim.ssp_assoc_id); | |
2869 | if (!trans) | |
2870 | return -EINVAL; | |
2871 | ||
2872 | sctp_assoc_set_primary(trans->asoc, trans); | |
2873 | ||
2874 | return 0; | |
2875 | } | |
2876 | ||
2877 | /* | |
2878 | * 7.1.5 SCTP_NODELAY | |
2879 | * | |
2880 | * Turn on/off any Nagle-like algorithm. This means that packets are | |
2881 | * generally sent as soon as possible and no unnecessary delays are | |
2882 | * introduced, at the cost of more packets in the network. Expects an | |
2883 | * integer boolean flag. | |
2884 | */ | |
2885 | static int sctp_setsockopt_nodelay(struct sock *sk, char __user *optval, | |
b7058842 | 2886 | unsigned int optlen) |
1da177e4 LT |
2887 | { |
2888 | int val; | |
2889 | ||
2890 | if (optlen < sizeof(int)) | |
2891 | return -EINVAL; | |
2892 | if (get_user(val, (int __user *)optval)) | |
2893 | return -EFAULT; | |
2894 | ||
2895 | sctp_sk(sk)->nodelay = (val == 0) ? 0 : 1; | |
2896 | return 0; | |
2897 | } | |
2898 | ||
2899 | /* | |
2900 | * | |
2901 | * 7.1.1 SCTP_RTOINFO | |
2902 | * | |
2903 | * The protocol parameters used to initialize and bound retransmission | |
2904 | * timeout (RTO) are tunable. sctp_rtoinfo structure is used to access | |
2905 | * and modify these parameters. | |
2906 | * All parameters are time values, in milliseconds. A value of 0, when | |
2907 | * modifying the parameters, indicates that the current value should not | |
2908 | * be changed. | |
2909 | * | |
2910 | */ | |
b7058842 DM |
2911 | static int sctp_setsockopt_rtoinfo(struct sock *sk, char __user *optval, unsigned int optlen) |
2912 | { | |
1da177e4 LT |
2913 | struct sctp_rtoinfo rtoinfo; |
2914 | struct sctp_association *asoc; | |
85f935d4 | 2915 | unsigned long rto_min, rto_max; |
2916 | struct sctp_sock *sp = sctp_sk(sk); | |
1da177e4 LT |
2917 | |
2918 | if (optlen != sizeof (struct sctp_rtoinfo)) | |
2919 | return -EINVAL; | |
2920 | ||
2921 | if (copy_from_user(&rtoinfo, optval, optlen)) | |
2922 | return -EFAULT; | |
2923 | ||
2924 | asoc = sctp_id2assoc(sk, rtoinfo.srto_assoc_id); | |
2925 | ||
2926 | /* Set the values to the specific association */ | |
2927 | if (!asoc && rtoinfo.srto_assoc_id && sctp_style(sk, UDP)) | |
2928 | return -EINVAL; | |
2929 | ||
85f935d4 | 2930 | rto_max = rtoinfo.srto_max; |
2931 | rto_min = rtoinfo.srto_min; | |
2932 | ||
2933 | if (rto_max) | |
2934 | rto_max = asoc ? msecs_to_jiffies(rto_max) : rto_max; | |
2935 | else | |
2936 | rto_max = asoc ? asoc->rto_max : sp->rtoinfo.srto_max; | |
2937 | ||
2938 | if (rto_min) | |
2939 | rto_min = asoc ? msecs_to_jiffies(rto_min) : rto_min; | |
2940 | else | |
2941 | rto_min = asoc ? asoc->rto_min : sp->rtoinfo.srto_min; | |
2942 | ||
2943 | if (rto_min > rto_max) | |
2944 | return -EINVAL; | |
2945 | ||
1da177e4 LT |
2946 | if (asoc) { |
2947 | if (rtoinfo.srto_initial != 0) | |
d808ad9a | 2948 | asoc->rto_initial = |
1da177e4 | 2949 | msecs_to_jiffies(rtoinfo.srto_initial); |
85f935d4 | 2950 | asoc->rto_max = rto_max; |
2951 | asoc->rto_min = rto_min; | |
1da177e4 LT |
2952 | } else { |
2953 | /* If there is no association or the association-id = 0 | |
2954 | * set the values to the endpoint. | |
2955 | */ | |
1da177e4 LT |
2956 | if (rtoinfo.srto_initial != 0) |
2957 | sp->rtoinfo.srto_initial = rtoinfo.srto_initial; | |
85f935d4 | 2958 | sp->rtoinfo.srto_max = rto_max; |
2959 | sp->rtoinfo.srto_min = rto_min; | |
1da177e4 LT |
2960 | } |
2961 | ||
2962 | return 0; | |
2963 | } | |
2964 | ||
2965 | /* | |
2966 | * | |
2967 | * 7.1.2 SCTP_ASSOCINFO | |
2968 | * | |
59c51591 | 2969 | * This option is used to tune the maximum retransmission attempts |
1da177e4 LT |
2970 | * of the association. |
2971 | * Returns an error if the new association retransmission value is | |
2972 | * greater than the sum of the retransmission value of the peer. | |
2973 | * See [SCTP] for more information. | |
2974 | * | |
2975 | */ | |
b7058842 | 2976 | static int sctp_setsockopt_associnfo(struct sock *sk, char __user *optval, unsigned int optlen) |
1da177e4 LT |
2977 | { |
2978 | ||
2979 | struct sctp_assocparams assocparams; | |
2980 | struct sctp_association *asoc; | |
2981 | ||
2982 | if (optlen != sizeof(struct sctp_assocparams)) | |
2983 | return -EINVAL; | |
2984 | if (copy_from_user(&assocparams, optval, optlen)) | |
2985 | return -EFAULT; | |
2986 | ||
2987 | asoc = sctp_id2assoc(sk, assocparams.sasoc_assoc_id); | |
2988 | ||
2989 | if (!asoc && assocparams.sasoc_assoc_id && sctp_style(sk, UDP)) | |
2990 | return -EINVAL; | |
2991 | ||
2992 | /* Set the values to the specific association */ | |
2993 | if (asoc) { | |
402d68c4 VY |
2994 | if (assocparams.sasoc_asocmaxrxt != 0) { |
2995 | __u32 path_sum = 0; | |
2996 | int paths = 0; | |
402d68c4 VY |
2997 | struct sctp_transport *peer_addr; |
2998 | ||
9dbc15f0 RD |
2999 | list_for_each_entry(peer_addr, &asoc->peer.transport_addr_list, |
3000 | transports) { | |
402d68c4 VY |
3001 | path_sum += peer_addr->pathmaxrxt; |
3002 | paths++; | |
3003 | } | |
3004 | ||
025dfdaf | 3005 | /* Only validate asocmaxrxt if we have more than |
402d68c4 VY |
3006 | * one path/transport. We do this because path |
3007 | * retransmissions are only counted when we have more | |
3008 | * then one path. | |
3009 | */ | |
3010 | if (paths > 1 && | |
3011 | assocparams.sasoc_asocmaxrxt > path_sum) | |
3012 | return -EINVAL; | |
3013 | ||
1da177e4 | 3014 | asoc->max_retrans = assocparams.sasoc_asocmaxrxt; |
402d68c4 VY |
3015 | } |
3016 | ||
52db882f DB |
3017 | if (assocparams.sasoc_cookie_life != 0) |
3018 | asoc->cookie_life = ms_to_ktime(assocparams.sasoc_cookie_life); | |
1da177e4 LT |
3019 | } else { |
3020 | /* Set the values to the endpoint */ | |
3021 | struct sctp_sock *sp = sctp_sk(sk); | |
3022 | ||
3023 | if (assocparams.sasoc_asocmaxrxt != 0) | |
3024 | sp->assocparams.sasoc_asocmaxrxt = | |
3025 | assocparams.sasoc_asocmaxrxt; | |
3026 | if (assocparams.sasoc_cookie_life != 0) | |
3027 | sp->assocparams.sasoc_cookie_life = | |
3028 | assocparams.sasoc_cookie_life; | |
3029 | } | |
3030 | return 0; | |
3031 | } | |
3032 | ||
3033 | /* | |
3034 | * 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR) | |
3035 | * | |
3036 | * This socket option is a boolean flag which turns on or off mapped V4 | |
3037 | * addresses. If this option is turned on and the socket is type | |
3038 | * PF_INET6, then IPv4 addresses will be mapped to V6 representation. | |
3039 | * If this option is turned off, then no mapping will be done of V4 | |
3040 | * addresses and a user will receive both PF_INET6 and PF_INET type | |
3041 | * addresses on the socket. | |
3042 | */ | |
b7058842 | 3043 | static int sctp_setsockopt_mappedv4(struct sock *sk, char __user *optval, unsigned int optlen) |
1da177e4 LT |
3044 | { |
3045 | int val; | |
3046 | struct sctp_sock *sp = sctp_sk(sk); | |
3047 | ||
3048 | if (optlen < sizeof(int)) | |
3049 | return -EINVAL; | |
3050 | if (get_user(val, (int __user *)optval)) | |
3051 | return -EFAULT; | |
3052 | if (val) | |
3053 | sp->v4mapped = 1; | |
3054 | else | |
3055 | sp->v4mapped = 0; | |
3056 | ||
3057 | return 0; | |
3058 | } | |
3059 | ||
3060 | /* | |
e89c2095 WY |
3061 | * 8.1.16. Get or Set the Maximum Fragmentation Size (SCTP_MAXSEG) |
3062 | * This option will get or set the maximum size to put in any outgoing | |
3063 | * SCTP DATA chunk. If a message is larger than this size it will be | |
1da177e4 LT |
3064 | * fragmented by SCTP into the specified size. Note that the underlying |
3065 | * SCTP implementation may fragment into smaller sized chunks when the | |
3066 | * PMTU of the underlying association is smaller than the value set by | |
e89c2095 WY |
3067 | * the user. The default value for this option is '0' which indicates |
3068 | * the user is NOT limiting fragmentation and only the PMTU will effect | |
3069 | * SCTP's choice of DATA chunk size. Note also that values set larger | |
3070 | * than the maximum size of an IP datagram will effectively let SCTP | |
3071 | * control fragmentation (i.e. the same as setting this option to 0). | |
3072 | * | |
3073 | * The following structure is used to access and modify this parameter: | |
3074 | * | |
3075 | * struct sctp_assoc_value { | |
3076 | * sctp_assoc_t assoc_id; | |
3077 | * uint32_t assoc_value; | |
3078 | * }; | |
3079 | * | |
3080 | * assoc_id: This parameter is ignored for one-to-one style sockets. | |
3081 | * For one-to-many style sockets this parameter indicates which | |
3082 | * association the user is performing an action upon. Note that if | |
3083 | * this field's value is zero then the endpoints default value is | |
3084 | * changed (effecting future associations only). | |
3085 | * assoc_value: This parameter specifies the maximum size in bytes. | |
1da177e4 | 3086 | */ |
b7058842 | 3087 | static int sctp_setsockopt_maxseg(struct sock *sk, char __user *optval, unsigned int optlen) |
1da177e4 | 3088 | { |
ecca8f88 | 3089 | struct sctp_sock *sp = sctp_sk(sk); |
e89c2095 | 3090 | struct sctp_assoc_value params; |
1da177e4 | 3091 | struct sctp_association *asoc; |
1da177e4 LT |
3092 | int val; |
3093 | ||
e89c2095 | 3094 | if (optlen == sizeof(int)) { |
94f65193 | 3095 | pr_warn_ratelimited(DEPRECATED |
f916ec96 | 3096 | "%s (pid %d) " |
94f65193 | 3097 | "Use of int in maxseg socket option.\n" |
f916ec96 NH |
3098 | "Use struct sctp_assoc_value instead\n", |
3099 | current->comm, task_pid_nr(current)); | |
e89c2095 WY |
3100 | if (copy_from_user(&val, optval, optlen)) |
3101 | return -EFAULT; | |
3102 | params.assoc_id = 0; | |
3103 | } else if (optlen == sizeof(struct sctp_assoc_value)) { | |
3104 | if (copy_from_user(¶ms, optval, optlen)) | |
3105 | return -EFAULT; | |
3106 | val = params.assoc_value; | |
ecca8f88 | 3107 | } else { |
1da177e4 | 3108 | return -EINVAL; |
ecca8f88 | 3109 | } |
e89c2095 | 3110 | |
ecca8f88 XL |
3111 | if (val) { |
3112 | int min_len, max_len; | |
1da177e4 | 3113 | |
ecca8f88 XL |
3114 | min_len = SCTP_DEFAULT_MINSEGMENT - sp->pf->af->net_header_len; |
3115 | min_len -= sizeof(struct sctphdr) + | |
3116 | sizeof(struct sctp_data_chunk); | |
3117 | ||
3118 | max_len = SCTP_MAX_CHUNK_LEN - sizeof(struct sctp_data_chunk); | |
e89c2095 | 3119 | |
ecca8f88 XL |
3120 | if (val < min_len || val > max_len) |
3121 | return -EINVAL; | |
3122 | } | |
3123 | ||
3124 | asoc = sctp_id2assoc(sk, params.assoc_id); | |
e89c2095 WY |
3125 | if (asoc) { |
3126 | if (val == 0) { | |
ecca8f88 | 3127 | val = asoc->pathmtu - sp->pf->af->net_header_len; |
e89c2095 | 3128 | val -= sizeof(struct sctphdr) + |
668c9beb | 3129 | sctp_datachk_len(&asoc->stream); |
e89c2095 | 3130 | } |
f68b2e05 VY |
3131 | asoc->user_frag = val; |
3132 | asoc->frag_point = sctp_frag_point(asoc, asoc->pathmtu); | |
e89c2095 | 3133 | } else { |
ecca8f88 XL |
3134 | if (params.assoc_id && sctp_style(sk, UDP)) |
3135 | return -EINVAL; | |
e89c2095 | 3136 | sp->user_frag = val; |
1da177e4 LT |
3137 | } |
3138 | ||
3139 | return 0; | |
3140 | } | |
3141 | ||
3142 | ||
3143 | /* | |
3144 | * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR) | |
3145 | * | |
3146 | * Requests that the peer mark the enclosed address as the association | |
3147 | * primary. The enclosed address must be one of the association's | |
3148 | * locally bound addresses. The following structure is used to make a | |
3149 | * set primary request: | |
3150 | */ | |
3151 | static int sctp_setsockopt_peer_primary_addr(struct sock *sk, char __user *optval, | |
b7058842 | 3152 | unsigned int optlen) |
1da177e4 | 3153 | { |
e1fc3b14 | 3154 | struct net *net = sock_net(sk); |
1da177e4 | 3155 | struct sctp_sock *sp; |
1da177e4 LT |
3156 | struct sctp_association *asoc = NULL; |
3157 | struct sctp_setpeerprim prim; | |
3158 | struct sctp_chunk *chunk; | |
40a01039 | 3159 | struct sctp_af *af; |
1da177e4 LT |
3160 | int err; |
3161 | ||
3162 | sp = sctp_sk(sk); | |
1da177e4 | 3163 | |
e1fc3b14 | 3164 | if (!net->sctp.addip_enable) |
1da177e4 LT |
3165 | return -EPERM; |
3166 | ||
3167 | if (optlen != sizeof(struct sctp_setpeerprim)) | |
3168 | return -EINVAL; | |
3169 | ||
3170 | if (copy_from_user(&prim, optval, optlen)) | |
3171 | return -EFAULT; | |
3172 | ||
3173 | asoc = sctp_id2assoc(sk, prim.sspp_assoc_id); | |
d808ad9a | 3174 | if (!asoc) |
1da177e4 LT |
3175 | return -EINVAL; |
3176 | ||
3177 | if (!asoc->peer.asconf_capable) | |
3178 | return -EPERM; | |
3179 | ||
3180 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_SET_PRIMARY) | |
3181 | return -EPERM; | |
3182 | ||
3183 | if (!sctp_state(asoc, ESTABLISHED)) | |
3184 | return -ENOTCONN; | |
3185 | ||
40a01039 WY |
3186 | af = sctp_get_af_specific(prim.sspp_addr.ss_family); |
3187 | if (!af) | |
3188 | return -EINVAL; | |
3189 | ||
3190 | if (!af->addr_valid((union sctp_addr *)&prim.sspp_addr, sp, NULL)) | |
3191 | return -EADDRNOTAVAIL; | |
3192 | ||
1da177e4 LT |
3193 | if (!sctp_assoc_lookup_laddr(asoc, (union sctp_addr *)&prim.sspp_addr)) |
3194 | return -EADDRNOTAVAIL; | |
3195 | ||
3196 | /* Create an ASCONF chunk with SET_PRIMARY parameter */ | |
3197 | chunk = sctp_make_asconf_set_prim(asoc, | |
3198 | (union sctp_addr *)&prim.sspp_addr); | |
3199 | if (!chunk) | |
3200 | return -ENOMEM; | |
3201 | ||
3202 | err = sctp_send_asconf(asoc, chunk); | |
3203 | ||
bb33381d | 3204 | pr_debug("%s: we set peer primary addr primitively\n", __func__); |
1da177e4 LT |
3205 | |
3206 | return err; | |
3207 | } | |
3208 | ||
0f3fffd8 | 3209 | static int sctp_setsockopt_adaptation_layer(struct sock *sk, char __user *optval, |
b7058842 | 3210 | unsigned int optlen) |
1da177e4 | 3211 | { |
0f3fffd8 | 3212 | struct sctp_setadaptation adaptation; |
1da177e4 | 3213 | |
0f3fffd8 | 3214 | if (optlen != sizeof(struct sctp_setadaptation)) |
1da177e4 | 3215 | return -EINVAL; |
0f3fffd8 | 3216 | if (copy_from_user(&adaptation, optval, optlen)) |
1da177e4 LT |
3217 | return -EFAULT; |
3218 | ||
0f3fffd8 | 3219 | sctp_sk(sk)->adaptation_ind = adaptation.ssb_adaptation_ind; |
1da177e4 LT |
3220 | |
3221 | return 0; | |
3222 | } | |
3223 | ||
6ab792f5 ISJ |
3224 | /* |
3225 | * 7.1.29. Set or Get the default context (SCTP_CONTEXT) | |
3226 | * | |
3227 | * The context field in the sctp_sndrcvinfo structure is normally only | |
3228 | * used when a failed message is retrieved holding the value that was | |
3229 | * sent down on the actual send call. This option allows the setting of | |
3230 | * a default context on an association basis that will be received on | |
3231 | * reading messages from the peer. This is especially helpful in the | |
3232 | * one-2-many model for an application to keep some reference to an | |
3233 | * internal state machine that is processing messages on the | |
3234 | * association. Note that the setting of this value only effects | |
3235 | * received messages from the peer and does not effect the value that is | |
3236 | * saved with outbound messages. | |
3237 | */ | |
3238 | static int sctp_setsockopt_context(struct sock *sk, char __user *optval, | |
b7058842 | 3239 | unsigned int optlen) |
6ab792f5 ISJ |
3240 | { |
3241 | struct sctp_assoc_value params; | |
3242 | struct sctp_sock *sp; | |
3243 | struct sctp_association *asoc; | |
3244 | ||
3245 | if (optlen != sizeof(struct sctp_assoc_value)) | |
3246 | return -EINVAL; | |
3247 | if (copy_from_user(¶ms, optval, optlen)) | |
3248 | return -EFAULT; | |
3249 | ||
3250 | sp = sctp_sk(sk); | |
3251 | ||
3252 | if (params.assoc_id != 0) { | |
3253 | asoc = sctp_id2assoc(sk, params.assoc_id); | |
3254 | if (!asoc) | |
3255 | return -EINVAL; | |
3256 | asoc->default_rcv_context = params.assoc_value; | |
3257 | } else { | |
3258 | sp->default_rcv_context = params.assoc_value; | |
3259 | } | |
3260 | ||
3261 | return 0; | |
3262 | } | |
3263 | ||
b6e1331f VY |
3264 | /* |
3265 | * 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE) | |
3266 | * | |
3267 | * This options will at a minimum specify if the implementation is doing | |
3268 | * fragmented interleave. Fragmented interleave, for a one to many | |
3269 | * socket, is when subsequent calls to receive a message may return | |
3270 | * parts of messages from different associations. Some implementations | |
3271 | * may allow you to turn this value on or off. If so, when turned off, | |
3272 | * no fragment interleave will occur (which will cause a head of line | |
3273 | * blocking amongst multiple associations sharing the same one to many | |
3274 | * socket). When this option is turned on, then each receive call may | |
3275 | * come from a different association (thus the user must receive data | |
3276 | * with the extended calls (e.g. sctp_recvmsg) to keep track of which | |
3277 | * association each receive belongs to. | |
3278 | * | |
3279 | * This option takes a boolean value. A non-zero value indicates that | |
3280 | * fragmented interleave is on. A value of zero indicates that | |
3281 | * fragmented interleave is off. | |
3282 | * | |
3283 | * Note that it is important that an implementation that allows this | |
3284 | * option to be turned on, have it off by default. Otherwise an unaware | |
3285 | * application using the one to many model may become confused and act | |
3286 | * incorrectly. | |
3287 | */ | |
3288 | static int sctp_setsockopt_fragment_interleave(struct sock *sk, | |
3289 | char __user *optval, | |
b7058842 | 3290 | unsigned int optlen) |
b6e1331f VY |
3291 | { |
3292 | int val; | |
3293 | ||
3294 | if (optlen != sizeof(int)) | |
3295 | return -EINVAL; | |
3296 | if (get_user(val, (int __user *)optval)) | |
3297 | return -EFAULT; | |
3298 | ||
772a5869 XL |
3299 | sctp_sk(sk)->frag_interleave = !!val; |
3300 | ||
3301 | if (!sctp_sk(sk)->frag_interleave) | |
3302 | sctp_sk(sk)->strm_interleave = 0; | |
b6e1331f VY |
3303 | |
3304 | return 0; | |
3305 | } | |
3306 | ||
d49d91d7 | 3307 | /* |
8510b937 | 3308 | * 8.1.21. Set or Get the SCTP Partial Delivery Point |
d49d91d7 | 3309 | * (SCTP_PARTIAL_DELIVERY_POINT) |
8510b937 | 3310 | * |
d49d91d7 VY |
3311 | * This option will set or get the SCTP partial delivery point. This |
3312 | * point is the size of a message where the partial delivery API will be | |
3313 | * invoked to help free up rwnd space for the peer. Setting this to a | |
8510b937 | 3314 | * lower value will cause partial deliveries to happen more often. The |
d49d91d7 | 3315 | * calls argument is an integer that sets or gets the partial delivery |
8510b937 WY |
3316 | * point. Note also that the call will fail if the user attempts to set |
3317 | * this value larger than the socket receive buffer size. | |
3318 | * | |
3319 | * Note that any single message having a length smaller than or equal to | |
3320 | * the SCTP partial delivery point will be delivered in one single read | |
3321 | * call as long as the user provided buffer is large enough to hold the | |
3322 | * message. | |
d49d91d7 VY |
3323 | */ |
3324 | static int sctp_setsockopt_partial_delivery_point(struct sock *sk, | |
3325 | char __user *optval, | |
b7058842 | 3326 | unsigned int optlen) |
d49d91d7 VY |
3327 | { |
3328 | u32 val; | |
3329 | ||
3330 | if (optlen != sizeof(u32)) | |
3331 | return -EINVAL; | |
3332 | if (get_user(val, (int __user *)optval)) | |
3333 | return -EFAULT; | |
3334 | ||
8510b937 WY |
3335 | /* Note: We double the receive buffer from what the user sets |
3336 | * it to be, also initial rwnd is based on rcvbuf/2. | |
3337 | */ | |
3338 | if (val > (sk->sk_rcvbuf >> 1)) | |
3339 | return -EINVAL; | |
3340 | ||
d49d91d7 VY |
3341 | sctp_sk(sk)->pd_point = val; |
3342 | ||
3343 | return 0; /* is this the right error code? */ | |
3344 | } | |
3345 | ||
70331571 VY |
3346 | /* |
3347 | * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST) | |
3348 | * | |
3349 | * This option will allow a user to change the maximum burst of packets | |
3350 | * that can be emitted by this association. Note that the default value | |
3351 | * is 4, and some implementations may restrict this setting so that it | |
3352 | * can only be lowered. | |
3353 | * | |
3354 | * NOTE: This text doesn't seem right. Do this on a socket basis with | |
3355 | * future associations inheriting the socket value. | |
3356 | */ | |
3357 | static int sctp_setsockopt_maxburst(struct sock *sk, | |
3358 | char __user *optval, | |
b7058842 | 3359 | unsigned int optlen) |
70331571 | 3360 | { |
219b99a9 NH |
3361 | struct sctp_assoc_value params; |
3362 | struct sctp_sock *sp; | |
3363 | struct sctp_association *asoc; | |
70331571 | 3364 | int val; |
219b99a9 | 3365 | int assoc_id = 0; |
70331571 | 3366 | |
219b99a9 | 3367 | if (optlen == sizeof(int)) { |
94f65193 | 3368 | pr_warn_ratelimited(DEPRECATED |
f916ec96 | 3369 | "%s (pid %d) " |
94f65193 | 3370 | "Use of int in max_burst socket option deprecated.\n" |
f916ec96 NH |
3371 | "Use struct sctp_assoc_value instead\n", |
3372 | current->comm, task_pid_nr(current)); | |
219b99a9 NH |
3373 | if (copy_from_user(&val, optval, optlen)) |
3374 | return -EFAULT; | |
3375 | } else if (optlen == sizeof(struct sctp_assoc_value)) { | |
3376 | if (copy_from_user(¶ms, optval, optlen)) | |
3377 | return -EFAULT; | |
3378 | val = params.assoc_value; | |
3379 | assoc_id = params.assoc_id; | |
3380 | } else | |
70331571 VY |
3381 | return -EINVAL; |
3382 | ||
219b99a9 NH |
3383 | sp = sctp_sk(sk); |
3384 | ||
3385 | if (assoc_id != 0) { | |
3386 | asoc = sctp_id2assoc(sk, assoc_id); | |
3387 | if (!asoc) | |
3388 | return -EINVAL; | |
3389 | asoc->max_burst = val; | |
3390 | } else | |
3391 | sp->max_burst = val; | |
70331571 VY |
3392 | |
3393 | return 0; | |
3394 | } | |
3395 | ||
65b07e5d VY |
3396 | /* |
3397 | * 7.1.18. Add a chunk that must be authenticated (SCTP_AUTH_CHUNK) | |
3398 | * | |
3399 | * This set option adds a chunk type that the user is requesting to be | |
3400 | * received only in an authenticated way. Changes to the list of chunks | |
3401 | * will only effect future associations on the socket. | |
3402 | */ | |
3403 | static int sctp_setsockopt_auth_chunk(struct sock *sk, | |
b7058842 DM |
3404 | char __user *optval, |
3405 | unsigned int optlen) | |
65b07e5d | 3406 | { |
b14878cc | 3407 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d VY |
3408 | struct sctp_authchunk val; |
3409 | ||
b14878cc | 3410 | if (!ep->auth_enable) |
5e739d17 VY |
3411 | return -EACCES; |
3412 | ||
65b07e5d VY |
3413 | if (optlen != sizeof(struct sctp_authchunk)) |
3414 | return -EINVAL; | |
3415 | if (copy_from_user(&val, optval, optlen)) | |
3416 | return -EFAULT; | |
3417 | ||
3418 | switch (val.sauth_chunk) { | |
7fd71b1e JP |
3419 | case SCTP_CID_INIT: |
3420 | case SCTP_CID_INIT_ACK: | |
3421 | case SCTP_CID_SHUTDOWN_COMPLETE: | |
3422 | case SCTP_CID_AUTH: | |
3423 | return -EINVAL; | |
65b07e5d VY |
3424 | } |
3425 | ||
3426 | /* add this chunk id to the endpoint */ | |
b14878cc | 3427 | return sctp_auth_ep_add_chunkid(ep, val.sauth_chunk); |
65b07e5d VY |
3428 | } |
3429 | ||
3430 | /* | |
3431 | * 7.1.19. Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT) | |
3432 | * | |
3433 | * This option gets or sets the list of HMAC algorithms that the local | |
3434 | * endpoint requires the peer to use. | |
3435 | */ | |
3436 | static int sctp_setsockopt_hmac_ident(struct sock *sk, | |
b7058842 DM |
3437 | char __user *optval, |
3438 | unsigned int optlen) | |
65b07e5d | 3439 | { |
b14878cc | 3440 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d | 3441 | struct sctp_hmacalgo *hmacs; |
d9724055 | 3442 | u32 idents; |
65b07e5d VY |
3443 | int err; |
3444 | ||
b14878cc | 3445 | if (!ep->auth_enable) |
5e739d17 VY |
3446 | return -EACCES; |
3447 | ||
65b07e5d VY |
3448 | if (optlen < sizeof(struct sctp_hmacalgo)) |
3449 | return -EINVAL; | |
5960cefa MRL |
3450 | optlen = min_t(unsigned int, optlen, sizeof(struct sctp_hmacalgo) + |
3451 | SCTP_AUTH_NUM_HMACS * sizeof(u16)); | |
65b07e5d | 3452 | |
cb3f837b | 3453 | hmacs = memdup_user(optval, optlen); |
934253a7 SW |
3454 | if (IS_ERR(hmacs)) |
3455 | return PTR_ERR(hmacs); | |
65b07e5d | 3456 | |
d9724055 VY |
3457 | idents = hmacs->shmac_num_idents; |
3458 | if (idents == 0 || idents > SCTP_AUTH_NUM_HMACS || | |
3459 | (idents * sizeof(u16)) > (optlen - sizeof(struct sctp_hmacalgo))) { | |
65b07e5d VY |
3460 | err = -EINVAL; |
3461 | goto out; | |
3462 | } | |
3463 | ||
b14878cc | 3464 | err = sctp_auth_ep_set_hmacs(ep, hmacs); |
65b07e5d VY |
3465 | out: |
3466 | kfree(hmacs); | |
3467 | return err; | |
3468 | } | |
3469 | ||
3470 | /* | |
3471 | * 7.1.20. Set a shared key (SCTP_AUTH_KEY) | |
3472 | * | |
3473 | * This option will set a shared secret key which is used to build an | |
3474 | * association shared key. | |
3475 | */ | |
3476 | static int sctp_setsockopt_auth_key(struct sock *sk, | |
3477 | char __user *optval, | |
b7058842 | 3478 | unsigned int optlen) |
65b07e5d | 3479 | { |
b14878cc | 3480 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d VY |
3481 | struct sctp_authkey *authkey; |
3482 | struct sctp_association *asoc; | |
3483 | int ret; | |
3484 | ||
b14878cc | 3485 | if (!ep->auth_enable) |
5e739d17 VY |
3486 | return -EACCES; |
3487 | ||
65b07e5d VY |
3488 | if (optlen <= sizeof(struct sctp_authkey)) |
3489 | return -EINVAL; | |
5960cefa MRL |
3490 | /* authkey->sca_keylength is u16, so optlen can't be bigger than |
3491 | * this. | |
3492 | */ | |
3493 | optlen = min_t(unsigned int, optlen, USHRT_MAX + | |
3494 | sizeof(struct sctp_authkey)); | |
65b07e5d | 3495 | |
cb3f837b | 3496 | authkey = memdup_user(optval, optlen); |
934253a7 SW |
3497 | if (IS_ERR(authkey)) |
3498 | return PTR_ERR(authkey); | |
65b07e5d | 3499 | |
328fc47e | 3500 | if (authkey->sca_keylength > optlen - sizeof(struct sctp_authkey)) { |
30c2235c VY |
3501 | ret = -EINVAL; |
3502 | goto out; | |
3503 | } | |
3504 | ||
65b07e5d VY |
3505 | asoc = sctp_id2assoc(sk, authkey->sca_assoc_id); |
3506 | if (!asoc && authkey->sca_assoc_id && sctp_style(sk, UDP)) { | |
3507 | ret = -EINVAL; | |
3508 | goto out; | |
3509 | } | |
3510 | ||
b14878cc | 3511 | ret = sctp_auth_set_key(ep, asoc, authkey); |
65b07e5d | 3512 | out: |
6ba542a2 | 3513 | kzfree(authkey); |
65b07e5d VY |
3514 | return ret; |
3515 | } | |
3516 | ||
3517 | /* | |
3518 | * 7.1.21. Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY) | |
3519 | * | |
3520 | * This option will get or set the active shared key to be used to build | |
3521 | * the association shared key. | |
3522 | */ | |
3523 | static int sctp_setsockopt_active_key(struct sock *sk, | |
b7058842 DM |
3524 | char __user *optval, |
3525 | unsigned int optlen) | |
65b07e5d | 3526 | { |
b14878cc | 3527 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d VY |
3528 | struct sctp_authkeyid val; |
3529 | struct sctp_association *asoc; | |
3530 | ||
b14878cc | 3531 | if (!ep->auth_enable) |
5e739d17 VY |
3532 | return -EACCES; |
3533 | ||
65b07e5d VY |
3534 | if (optlen != sizeof(struct sctp_authkeyid)) |
3535 | return -EINVAL; | |
3536 | if (copy_from_user(&val, optval, optlen)) | |
3537 | return -EFAULT; | |
3538 | ||
3539 | asoc = sctp_id2assoc(sk, val.scact_assoc_id); | |
3540 | if (!asoc && val.scact_assoc_id && sctp_style(sk, UDP)) | |
3541 | return -EINVAL; | |
3542 | ||
b14878cc | 3543 | return sctp_auth_set_active_key(ep, asoc, val.scact_keynumber); |
65b07e5d VY |
3544 | } |
3545 | ||
3546 | /* | |
3547 | * 7.1.22. Delete a shared key (SCTP_AUTH_DELETE_KEY) | |
3548 | * | |
3549 | * This set option will delete a shared secret key from use. | |
3550 | */ | |
3551 | static int sctp_setsockopt_del_key(struct sock *sk, | |
b7058842 DM |
3552 | char __user *optval, |
3553 | unsigned int optlen) | |
65b07e5d | 3554 | { |
b14878cc | 3555 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d VY |
3556 | struct sctp_authkeyid val; |
3557 | struct sctp_association *asoc; | |
3558 | ||
b14878cc | 3559 | if (!ep->auth_enable) |
5e739d17 VY |
3560 | return -EACCES; |
3561 | ||
65b07e5d VY |
3562 | if (optlen != sizeof(struct sctp_authkeyid)) |
3563 | return -EINVAL; | |
3564 | if (copy_from_user(&val, optval, optlen)) | |
3565 | return -EFAULT; | |
3566 | ||
3567 | asoc = sctp_id2assoc(sk, val.scact_assoc_id); | |
3568 | if (!asoc && val.scact_assoc_id && sctp_style(sk, UDP)) | |
3569 | return -EINVAL; | |
3570 | ||
b14878cc | 3571 | return sctp_auth_del_key_id(ep, asoc, val.scact_keynumber); |
65b07e5d VY |
3572 | |
3573 | } | |
3574 | ||
7dc04d71 MH |
3575 | /* |
3576 | * 8.1.23 SCTP_AUTO_ASCONF | |
3577 | * | |
3578 | * This option will enable or disable the use of the automatic generation of | |
3579 | * ASCONF chunks to add and delete addresses to an existing association. Note | |
3580 | * that this option has two caveats namely: a) it only affects sockets that | |
3581 | * are bound to all addresses available to the SCTP stack, and b) the system | |
3582 | * administrator may have an overriding control that turns the ASCONF feature | |
3583 | * off no matter what setting the socket option may have. | |
3584 | * This option expects an integer boolean flag, where a non-zero value turns on | |
3585 | * the option, and a zero value turns off the option. | |
3586 | * Note. In this implementation, socket operation overrides default parameter | |
3587 | * being set by sysctl as well as FreeBSD implementation | |
3588 | */ | |
3589 | static int sctp_setsockopt_auto_asconf(struct sock *sk, char __user *optval, | |
3590 | unsigned int optlen) | |
3591 | { | |
3592 | int val; | |
3593 | struct sctp_sock *sp = sctp_sk(sk); | |
3594 | ||
3595 | if (optlen < sizeof(int)) | |
3596 | return -EINVAL; | |
3597 | if (get_user(val, (int __user *)optval)) | |
3598 | return -EFAULT; | |
3599 | if (!sctp_is_ep_boundall(sk) && val) | |
3600 | return -EINVAL; | |
3601 | if ((val && sp->do_auto_asconf) || (!val && !sp->do_auto_asconf)) | |
3602 | return 0; | |
3603 | ||
2d45a02d | 3604 | spin_lock_bh(&sock_net(sk)->sctp.addr_wq_lock); |
7dc04d71 MH |
3605 | if (val == 0 && sp->do_auto_asconf) { |
3606 | list_del(&sp->auto_asconf_list); | |
3607 | sp->do_auto_asconf = 0; | |
3608 | } else if (val && !sp->do_auto_asconf) { | |
3609 | list_add_tail(&sp->auto_asconf_list, | |
4db67e80 | 3610 | &sock_net(sk)->sctp.auto_asconf_splist); |
7dc04d71 MH |
3611 | sp->do_auto_asconf = 1; |
3612 | } | |
2d45a02d | 3613 | spin_unlock_bh(&sock_net(sk)->sctp.addr_wq_lock); |
7dc04d71 MH |
3614 | return 0; |
3615 | } | |
3616 | ||
5aa93bcf NH |
3617 | /* |
3618 | * SCTP_PEER_ADDR_THLDS | |
3619 | * | |
3620 | * This option allows us to alter the partially failed threshold for one or all | |
3621 | * transports in an association. See Section 6.1 of: | |
3622 | * http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txt | |
3623 | */ | |
3624 | static int sctp_setsockopt_paddr_thresholds(struct sock *sk, | |
3625 | char __user *optval, | |
3626 | unsigned int optlen) | |
3627 | { | |
3628 | struct sctp_paddrthlds val; | |
3629 | struct sctp_transport *trans; | |
3630 | struct sctp_association *asoc; | |
3631 | ||
3632 | if (optlen < sizeof(struct sctp_paddrthlds)) | |
3633 | return -EINVAL; | |
3634 | if (copy_from_user(&val, (struct sctp_paddrthlds __user *)optval, | |
3635 | sizeof(struct sctp_paddrthlds))) | |
3636 | return -EFAULT; | |
3637 | ||
3638 | ||
3639 | if (sctp_is_any(sk, (const union sctp_addr *)&val.spt_address)) { | |
3640 | asoc = sctp_id2assoc(sk, val.spt_assoc_id); | |
3641 | if (!asoc) | |
3642 | return -ENOENT; | |
3643 | list_for_each_entry(trans, &asoc->peer.transport_addr_list, | |
3644 | transports) { | |
3645 | if (val.spt_pathmaxrxt) | |
3646 | trans->pathmaxrxt = val.spt_pathmaxrxt; | |
3647 | trans->pf_retrans = val.spt_pathpfthld; | |
3648 | } | |
3649 | ||
3650 | if (val.spt_pathmaxrxt) | |
3651 | asoc->pathmaxrxt = val.spt_pathmaxrxt; | |
3652 | asoc->pf_retrans = val.spt_pathpfthld; | |
3653 | } else { | |
3654 | trans = sctp_addr_id2transport(sk, &val.spt_address, | |
3655 | val.spt_assoc_id); | |
3656 | if (!trans) | |
3657 | return -ENOENT; | |
3658 | ||
3659 | if (val.spt_pathmaxrxt) | |
3660 | trans->pathmaxrxt = val.spt_pathmaxrxt; | |
3661 | trans->pf_retrans = val.spt_pathpfthld; | |
3662 | } | |
3663 | ||
3664 | return 0; | |
3665 | } | |
3666 | ||
0d3a421d GOV |
3667 | static int sctp_setsockopt_recvrcvinfo(struct sock *sk, |
3668 | char __user *optval, | |
3669 | unsigned int optlen) | |
3670 | { | |
3671 | int val; | |
3672 | ||
3673 | if (optlen < sizeof(int)) | |
3674 | return -EINVAL; | |
3675 | if (get_user(val, (int __user *) optval)) | |
3676 | return -EFAULT; | |
3677 | ||
3678 | sctp_sk(sk)->recvrcvinfo = (val == 0) ? 0 : 1; | |
3679 | ||
3680 | return 0; | |
3681 | } | |
3682 | ||
2347c80f GOV |
3683 | static int sctp_setsockopt_recvnxtinfo(struct sock *sk, |
3684 | char __user *optval, | |
3685 | unsigned int optlen) | |
3686 | { | |
3687 | int val; | |
3688 | ||
3689 | if (optlen < sizeof(int)) | |
3690 | return -EINVAL; | |
3691 | if (get_user(val, (int __user *) optval)) | |
3692 | return -EFAULT; | |
3693 | ||
3694 | sctp_sk(sk)->recvnxtinfo = (val == 0) ? 0 : 1; | |
3695 | ||
3696 | return 0; | |
3697 | } | |
3698 | ||
28aa4c26 XL |
3699 | static int sctp_setsockopt_pr_supported(struct sock *sk, |
3700 | char __user *optval, | |
3701 | unsigned int optlen) | |
3702 | { | |
3703 | struct sctp_assoc_value params; | |
3704 | struct sctp_association *asoc; | |
3705 | int retval = -EINVAL; | |
3706 | ||
3707 | if (optlen != sizeof(params)) | |
3708 | goto out; | |
3709 | ||
3710 | if (copy_from_user(¶ms, optval, optlen)) { | |
3711 | retval = -EFAULT; | |
3712 | goto out; | |
3713 | } | |
3714 | ||
3715 | asoc = sctp_id2assoc(sk, params.assoc_id); | |
3716 | if (asoc) { | |
3717 | asoc->prsctp_enable = !!params.assoc_value; | |
3718 | } else if (!params.assoc_id) { | |
3719 | struct sctp_sock *sp = sctp_sk(sk); | |
3720 | ||
3721 | sp->ep->prsctp_enable = !!params.assoc_value; | |
3722 | } else { | |
3723 | goto out; | |
3724 | } | |
3725 | ||
3726 | retval = 0; | |
3727 | ||
3728 | out: | |
3729 | return retval; | |
3730 | } | |
3731 | ||
f959fb44 XL |
3732 | static int sctp_setsockopt_default_prinfo(struct sock *sk, |
3733 | char __user *optval, | |
3734 | unsigned int optlen) | |
3735 | { | |
3736 | struct sctp_default_prinfo info; | |
3737 | struct sctp_association *asoc; | |
3738 | int retval = -EINVAL; | |
3739 | ||
3740 | if (optlen != sizeof(info)) | |
3741 | goto out; | |
3742 | ||
3743 | if (copy_from_user(&info, optval, sizeof(info))) { | |
3744 | retval = -EFAULT; | |
3745 | goto out; | |
3746 | } | |
3747 | ||
3748 | if (info.pr_policy & ~SCTP_PR_SCTP_MASK) | |
3749 | goto out; | |
3750 | ||
3751 | if (info.pr_policy == SCTP_PR_SCTP_NONE) | |
3752 | info.pr_value = 0; | |
3753 | ||
3754 | asoc = sctp_id2assoc(sk, info.pr_assoc_id); | |
3755 | if (asoc) { | |
3756 | SCTP_PR_SET_POLICY(asoc->default_flags, info.pr_policy); | |
3757 | asoc->default_timetolive = info.pr_value; | |
3758 | } else if (!info.pr_assoc_id) { | |
3759 | struct sctp_sock *sp = sctp_sk(sk); | |
3760 | ||
3761 | SCTP_PR_SET_POLICY(sp->default_flags, info.pr_policy); | |
3762 | sp->default_timetolive = info.pr_value; | |
3763 | } else { | |
3764 | goto out; | |
3765 | } | |
3766 | ||
3767 | retval = 0; | |
3768 | ||
3769 | out: | |
3770 | return retval; | |
3771 | } | |
3772 | ||
c0d8bab6 XL |
3773 | static int sctp_setsockopt_reconfig_supported(struct sock *sk, |
3774 | char __user *optval, | |
3775 | unsigned int optlen) | |
3776 | { | |
3777 | struct sctp_assoc_value params; | |
3778 | struct sctp_association *asoc; | |
3779 | int retval = -EINVAL; | |
3780 | ||
3781 | if (optlen != sizeof(params)) | |
3782 | goto out; | |
3783 | ||
3784 | if (copy_from_user(¶ms, optval, optlen)) { | |
3785 | retval = -EFAULT; | |
3786 | goto out; | |
3787 | } | |
3788 | ||
3789 | asoc = sctp_id2assoc(sk, params.assoc_id); | |
3790 | if (asoc) { | |
3791 | asoc->reconf_enable = !!params.assoc_value; | |
3792 | } else if (!params.assoc_id) { | |
3793 | struct sctp_sock *sp = sctp_sk(sk); | |
3794 | ||
3795 | sp->ep->reconf_enable = !!params.assoc_value; | |
3796 | } else { | |
3797 | goto out; | |
3798 | } | |
3799 | ||
3800 | retval = 0; | |
3801 | ||
3802 | out: | |
3803 | return retval; | |
3804 | } | |
3805 | ||
9fb657ae XL |
3806 | static int sctp_setsockopt_enable_strreset(struct sock *sk, |
3807 | char __user *optval, | |
3808 | unsigned int optlen) | |
3809 | { | |
3810 | struct sctp_assoc_value params; | |
3811 | struct sctp_association *asoc; | |
3812 | int retval = -EINVAL; | |
3813 | ||
3814 | if (optlen != sizeof(params)) | |
3815 | goto out; | |
3816 | ||
3817 | if (copy_from_user(¶ms, optval, optlen)) { | |
3818 | retval = -EFAULT; | |
3819 | goto out; | |
3820 | } | |
3821 | ||
3822 | if (params.assoc_value & (~SCTP_ENABLE_STRRESET_MASK)) | |
3823 | goto out; | |
3824 | ||
3825 | asoc = sctp_id2assoc(sk, params.assoc_id); | |
3826 | if (asoc) { | |
3827 | asoc->strreset_enable = params.assoc_value; | |
3828 | } else if (!params.assoc_id) { | |
3829 | struct sctp_sock *sp = sctp_sk(sk); | |
3830 | ||
3831 | sp->ep->strreset_enable = params.assoc_value; | |
3832 | } else { | |
3833 | goto out; | |
3834 | } | |
3835 | ||
3836 | retval = 0; | |
3837 | ||
3838 | out: | |
3839 | return retval; | |
3840 | } | |
3841 | ||
7f9d68ac XL |
3842 | static int sctp_setsockopt_reset_streams(struct sock *sk, |
3843 | char __user *optval, | |
3844 | unsigned int optlen) | |
3845 | { | |
3846 | struct sctp_reset_streams *params; | |
3847 | struct sctp_association *asoc; | |
3848 | int retval = -EINVAL; | |
3849 | ||
2342b8d9 | 3850 | if (optlen < sizeof(*params)) |
7f9d68ac | 3851 | return -EINVAL; |
5960cefa MRL |
3852 | /* srs_number_streams is u16, so optlen can't be bigger than this. */ |
3853 | optlen = min_t(unsigned int, optlen, USHRT_MAX + | |
3854 | sizeof(__u16) * sizeof(*params)); | |
7f9d68ac XL |
3855 | |
3856 | params = memdup_user(optval, optlen); | |
3857 | if (IS_ERR(params)) | |
3858 | return PTR_ERR(params); | |
3859 | ||
2342b8d9 XL |
3860 | if (params->srs_number_streams * sizeof(__u16) > |
3861 | optlen - sizeof(*params)) | |
3862 | goto out; | |
3863 | ||
7f9d68ac XL |
3864 | asoc = sctp_id2assoc(sk, params->srs_assoc_id); |
3865 | if (!asoc) | |
3866 | goto out; | |
3867 | ||
3868 | retval = sctp_send_reset_streams(asoc, params); | |
3869 | ||
3870 | out: | |
3871 | kfree(params); | |
3872 | return retval; | |
3873 | } | |
3874 | ||
a92ce1a4 XL |
3875 | static int sctp_setsockopt_reset_assoc(struct sock *sk, |
3876 | char __user *optval, | |
3877 | unsigned int optlen) | |
3878 | { | |
3879 | struct sctp_association *asoc; | |
3880 | sctp_assoc_t associd; | |
3881 | int retval = -EINVAL; | |
3882 | ||
3883 | if (optlen != sizeof(associd)) | |
3884 | goto out; | |
3885 | ||
3886 | if (copy_from_user(&associd, optval, optlen)) { | |
3887 | retval = -EFAULT; | |
3888 | goto out; | |
3889 | } | |
3890 | ||
3891 | asoc = sctp_id2assoc(sk, associd); | |
3892 | if (!asoc) | |
3893 | goto out; | |
3894 | ||
3895 | retval = sctp_send_reset_assoc(asoc); | |
3896 | ||
3897 | out: | |
3898 | return retval; | |
3899 | } | |
3900 | ||
242bd2d5 XL |
3901 | static int sctp_setsockopt_add_streams(struct sock *sk, |
3902 | char __user *optval, | |
3903 | unsigned int optlen) | |
3904 | { | |
3905 | struct sctp_association *asoc; | |
3906 | struct sctp_add_streams params; | |
3907 | int retval = -EINVAL; | |
3908 | ||
3909 | if (optlen != sizeof(params)) | |
3910 | goto out; | |
3911 | ||
3912 | if (copy_from_user(¶ms, optval, optlen)) { | |
3913 | retval = -EFAULT; | |
3914 | goto out; | |
3915 | } | |
3916 | ||
3917 | asoc = sctp_id2assoc(sk, params.sas_assoc_id); | |
3918 | if (!asoc) | |
3919 | goto out; | |
3920 | ||
3921 | retval = sctp_send_add_streams(asoc, ¶ms); | |
3922 | ||
3923 | out: | |
3924 | return retval; | |
3925 | } | |
3926 | ||
13aa8770 MRL |
3927 | static int sctp_setsockopt_scheduler(struct sock *sk, |
3928 | char __user *optval, | |
3929 | unsigned int optlen) | |
3930 | { | |
3931 | struct sctp_association *asoc; | |
3932 | struct sctp_assoc_value params; | |
3933 | int retval = -EINVAL; | |
3934 | ||
3935 | if (optlen < sizeof(params)) | |
3936 | goto out; | |
3937 | ||
3938 | optlen = sizeof(params); | |
3939 | if (copy_from_user(¶ms, optval, optlen)) { | |
3940 | retval = -EFAULT; | |
3941 | goto out; | |
3942 | } | |
3943 | ||
3944 | if (params.assoc_value > SCTP_SS_MAX) | |
3945 | goto out; | |
3946 | ||
3947 | asoc = sctp_id2assoc(sk, params.assoc_id); | |
3948 | if (!asoc) | |
3949 | goto out; | |
3950 | ||
3951 | retval = sctp_sched_set_sched(asoc, params.assoc_value); | |
3952 | ||
3953 | out: | |
3954 | return retval; | |
3955 | } | |
3956 | ||
0ccdf3c7 MRL |
3957 | static int sctp_setsockopt_scheduler_value(struct sock *sk, |
3958 | char __user *optval, | |
3959 | unsigned int optlen) | |
3960 | { | |
3961 | struct sctp_association *asoc; | |
3962 | struct sctp_stream_value params; | |
3963 | int retval = -EINVAL; | |
3964 | ||
3965 | if (optlen < sizeof(params)) | |
3966 | goto out; | |
3967 | ||
3968 | optlen = sizeof(params); | |
3969 | if (copy_from_user(¶ms, optval, optlen)) { | |
3970 | retval = -EFAULT; | |
3971 | goto out; | |
3972 | } | |
3973 | ||
3974 | asoc = sctp_id2assoc(sk, params.assoc_id); | |
3975 | if (!asoc) | |
3976 | goto out; | |
3977 | ||
3978 | retval = sctp_sched_set_value(asoc, params.stream_id, | |
3979 | params.stream_value, GFP_KERNEL); | |
3980 | ||
3981 | out: | |
3982 | return retval; | |
3983 | } | |
3984 | ||
772a5869 XL |
3985 | static int sctp_setsockopt_interleaving_supported(struct sock *sk, |
3986 | char __user *optval, | |
3987 | unsigned int optlen) | |
3988 | { | |
3989 | struct sctp_sock *sp = sctp_sk(sk); | |
3990 | struct net *net = sock_net(sk); | |
3991 | struct sctp_assoc_value params; | |
3992 | int retval = -EINVAL; | |
3993 | ||
3994 | if (optlen < sizeof(params)) | |
3995 | goto out; | |
3996 | ||
3997 | optlen = sizeof(params); | |
3998 | if (copy_from_user(¶ms, optval, optlen)) { | |
3999 | retval = -EFAULT; | |
4000 | goto out; | |
4001 | } | |
4002 | ||
4003 | if (params.assoc_id) | |
4004 | goto out; | |
4005 | ||
4006 | if (!net->sctp.intl_enable || !sp->frag_interleave) { | |
4007 | retval = -EPERM; | |
4008 | goto out; | |
4009 | } | |
4010 | ||
4011 | sp->strm_interleave = !!params.assoc_value; | |
4012 | ||
4013 | retval = 0; | |
4014 | ||
4015 | out: | |
4016 | return retval; | |
4017 | } | |
4018 | ||
1da177e4 LT |
4019 | /* API 6.2 setsockopt(), getsockopt() |
4020 | * | |
4021 | * Applications use setsockopt() and getsockopt() to set or retrieve | |
4022 | * socket options. Socket options are used to change the default | |
4023 | * behavior of sockets calls. They are described in Section 7. | |
4024 | * | |
4025 | * The syntax is: | |
4026 | * | |
4027 | * ret = getsockopt(int sd, int level, int optname, void __user *optval, | |
4028 | * int __user *optlen); | |
4029 | * ret = setsockopt(int sd, int level, int optname, const void __user *optval, | |
4030 | * int optlen); | |
4031 | * | |
4032 | * sd - the socket descript. | |
4033 | * level - set to IPPROTO_SCTP for all SCTP options. | |
4034 | * optname - the option name. | |
4035 | * optval - the buffer to store the value of the option. | |
4036 | * optlen - the size of the buffer. | |
4037 | */ | |
dda91928 DB |
4038 | static int sctp_setsockopt(struct sock *sk, int level, int optname, |
4039 | char __user *optval, unsigned int optlen) | |
1da177e4 LT |
4040 | { |
4041 | int retval = 0; | |
4042 | ||
bb33381d | 4043 | pr_debug("%s: sk:%p, optname:%d\n", __func__, sk, optname); |
1da177e4 LT |
4044 | |
4045 | /* I can hardly begin to describe how wrong this is. This is | |
4046 | * so broken as to be worse than useless. The API draft | |
4047 | * REALLY is NOT helpful here... I am not convinced that the | |
4048 | * semantics of setsockopt() with a level OTHER THAN SOL_SCTP | |
4049 | * are at all well-founded. | |
4050 | */ | |
4051 | if (level != SOL_SCTP) { | |
4052 | struct sctp_af *af = sctp_sk(sk)->pf->af; | |
4053 | retval = af->setsockopt(sk, level, optname, optval, optlen); | |
4054 | goto out_nounlock; | |
4055 | } | |
4056 | ||
048ed4b6 | 4057 | lock_sock(sk); |
1da177e4 LT |
4058 | |
4059 | switch (optname) { | |
4060 | case SCTP_SOCKOPT_BINDX_ADD: | |
4061 | /* 'optlen' is the size of the addresses buffer. */ | |
4062 | retval = sctp_setsockopt_bindx(sk, (struct sockaddr __user *)optval, | |
4063 | optlen, SCTP_BINDX_ADD_ADDR); | |
4064 | break; | |
4065 | ||
4066 | case SCTP_SOCKOPT_BINDX_REM: | |
4067 | /* 'optlen' is the size of the addresses buffer. */ | |
4068 | retval = sctp_setsockopt_bindx(sk, (struct sockaddr __user *)optval, | |
4069 | optlen, SCTP_BINDX_REM_ADDR); | |
4070 | break; | |
4071 | ||
88a0a948 VY |
4072 | case SCTP_SOCKOPT_CONNECTX_OLD: |
4073 | /* 'optlen' is the size of the addresses buffer. */ | |
4074 | retval = sctp_setsockopt_connectx_old(sk, | |
4075 | (struct sockaddr __user *)optval, | |
4076 | optlen); | |
4077 | break; | |
4078 | ||
3f7a87d2 FF |
4079 | case SCTP_SOCKOPT_CONNECTX: |
4080 | /* 'optlen' is the size of the addresses buffer. */ | |
88a0a948 VY |
4081 | retval = sctp_setsockopt_connectx(sk, |
4082 | (struct sockaddr __user *)optval, | |
4083 | optlen); | |
3f7a87d2 FF |
4084 | break; |
4085 | ||
1da177e4 LT |
4086 | case SCTP_DISABLE_FRAGMENTS: |
4087 | retval = sctp_setsockopt_disable_fragments(sk, optval, optlen); | |
4088 | break; | |
4089 | ||
4090 | case SCTP_EVENTS: | |
4091 | retval = sctp_setsockopt_events(sk, optval, optlen); | |
4092 | break; | |
4093 | ||
4094 | case SCTP_AUTOCLOSE: | |
4095 | retval = sctp_setsockopt_autoclose(sk, optval, optlen); | |
4096 | break; | |
4097 | ||
4098 | case SCTP_PEER_ADDR_PARAMS: | |
4099 | retval = sctp_setsockopt_peer_addr_params(sk, optval, optlen); | |
4100 | break; | |
4101 | ||
4580ccc0 | 4102 | case SCTP_DELAYED_SACK: |
d364d927 | 4103 | retval = sctp_setsockopt_delayed_ack(sk, optval, optlen); |
7708610b | 4104 | break; |
d49d91d7 VY |
4105 | case SCTP_PARTIAL_DELIVERY_POINT: |
4106 | retval = sctp_setsockopt_partial_delivery_point(sk, optval, optlen); | |
4107 | break; | |
7708610b | 4108 | |
1da177e4 LT |
4109 | case SCTP_INITMSG: |
4110 | retval = sctp_setsockopt_initmsg(sk, optval, optlen); | |
4111 | break; | |
4112 | case SCTP_DEFAULT_SEND_PARAM: | |
4113 | retval = sctp_setsockopt_default_send_param(sk, optval, | |
4114 | optlen); | |
4115 | break; | |
6b3fd5f3 GOV |
4116 | case SCTP_DEFAULT_SNDINFO: |
4117 | retval = sctp_setsockopt_default_sndinfo(sk, optval, optlen); | |
4118 | break; | |
1da177e4 LT |
4119 | case SCTP_PRIMARY_ADDR: |
4120 | retval = sctp_setsockopt_primary_addr(sk, optval, optlen); | |
4121 | break; | |
4122 | case SCTP_SET_PEER_PRIMARY_ADDR: | |
4123 | retval = sctp_setsockopt_peer_primary_addr(sk, optval, optlen); | |
4124 | break; | |
4125 | case SCTP_NODELAY: | |
4126 | retval = sctp_setsockopt_nodelay(sk, optval, optlen); | |
4127 | break; | |
4128 | case SCTP_RTOINFO: | |
4129 | retval = sctp_setsockopt_rtoinfo(sk, optval, optlen); | |
4130 | break; | |
4131 | case SCTP_ASSOCINFO: | |
4132 | retval = sctp_setsockopt_associnfo(sk, optval, optlen); | |
4133 | break; | |
4134 | case SCTP_I_WANT_MAPPED_V4_ADDR: | |
4135 | retval = sctp_setsockopt_mappedv4(sk, optval, optlen); | |
4136 | break; | |
4137 | case SCTP_MAXSEG: | |
4138 | retval = sctp_setsockopt_maxseg(sk, optval, optlen); | |
4139 | break; | |
0f3fffd8 ISJ |
4140 | case SCTP_ADAPTATION_LAYER: |
4141 | retval = sctp_setsockopt_adaptation_layer(sk, optval, optlen); | |
1da177e4 | 4142 | break; |
6ab792f5 ISJ |
4143 | case SCTP_CONTEXT: |
4144 | retval = sctp_setsockopt_context(sk, optval, optlen); | |
4145 | break; | |
b6e1331f VY |
4146 | case SCTP_FRAGMENT_INTERLEAVE: |
4147 | retval = sctp_setsockopt_fragment_interleave(sk, optval, optlen); | |
4148 | break; | |
70331571 VY |
4149 | case SCTP_MAX_BURST: |
4150 | retval = sctp_setsockopt_maxburst(sk, optval, optlen); | |
4151 | break; | |
65b07e5d VY |
4152 | case SCTP_AUTH_CHUNK: |
4153 | retval = sctp_setsockopt_auth_chunk(sk, optval, optlen); | |
4154 | break; | |
4155 | case SCTP_HMAC_IDENT: | |
4156 | retval = sctp_setsockopt_hmac_ident(sk, optval, optlen); | |
4157 | break; | |
4158 | case SCTP_AUTH_KEY: | |
4159 | retval = sctp_setsockopt_auth_key(sk, optval, optlen); | |
4160 | break; | |
4161 | case SCTP_AUTH_ACTIVE_KEY: | |
4162 | retval = sctp_setsockopt_active_key(sk, optval, optlen); | |
4163 | break; | |
4164 | case SCTP_AUTH_DELETE_KEY: | |
4165 | retval = sctp_setsockopt_del_key(sk, optval, optlen); | |
4166 | break; | |
7dc04d71 MH |
4167 | case SCTP_AUTO_ASCONF: |
4168 | retval = sctp_setsockopt_auto_asconf(sk, optval, optlen); | |
4169 | break; | |
5aa93bcf NH |
4170 | case SCTP_PEER_ADDR_THLDS: |
4171 | retval = sctp_setsockopt_paddr_thresholds(sk, optval, optlen); | |
4172 | break; | |
0d3a421d GOV |
4173 | case SCTP_RECVRCVINFO: |
4174 | retval = sctp_setsockopt_recvrcvinfo(sk, optval, optlen); | |
4175 | break; | |
2347c80f GOV |
4176 | case SCTP_RECVNXTINFO: |
4177 | retval = sctp_setsockopt_recvnxtinfo(sk, optval, optlen); | |
4178 | break; | |
28aa4c26 XL |
4179 | case SCTP_PR_SUPPORTED: |
4180 | retval = sctp_setsockopt_pr_supported(sk, optval, optlen); | |
4181 | break; | |
f959fb44 XL |
4182 | case SCTP_DEFAULT_PRINFO: |
4183 | retval = sctp_setsockopt_default_prinfo(sk, optval, optlen); | |
4184 | break; | |
c0d8bab6 XL |
4185 | case SCTP_RECONFIG_SUPPORTED: |
4186 | retval = sctp_setsockopt_reconfig_supported(sk, optval, optlen); | |
4187 | break; | |
9fb657ae XL |
4188 | case SCTP_ENABLE_STREAM_RESET: |
4189 | retval = sctp_setsockopt_enable_strreset(sk, optval, optlen); | |
4190 | break; | |
7f9d68ac XL |
4191 | case SCTP_RESET_STREAMS: |
4192 | retval = sctp_setsockopt_reset_streams(sk, optval, optlen); | |
4193 | break; | |
a92ce1a4 XL |
4194 | case SCTP_RESET_ASSOC: |
4195 | retval = sctp_setsockopt_reset_assoc(sk, optval, optlen); | |
4196 | break; | |
242bd2d5 XL |
4197 | case SCTP_ADD_STREAMS: |
4198 | retval = sctp_setsockopt_add_streams(sk, optval, optlen); | |
4199 | break; | |
13aa8770 MRL |
4200 | case SCTP_STREAM_SCHEDULER: |
4201 | retval = sctp_setsockopt_scheduler(sk, optval, optlen); | |
4202 | break; | |
0ccdf3c7 MRL |
4203 | case SCTP_STREAM_SCHEDULER_VALUE: |
4204 | retval = sctp_setsockopt_scheduler_value(sk, optval, optlen); | |
4205 | break; | |
772a5869 XL |
4206 | case SCTP_INTERLEAVING_SUPPORTED: |
4207 | retval = sctp_setsockopt_interleaving_supported(sk, optval, | |
4208 | optlen); | |
4209 | break; | |
1da177e4 LT |
4210 | default: |
4211 | retval = -ENOPROTOOPT; | |
4212 | break; | |
3ff50b79 | 4213 | } |
1da177e4 | 4214 | |
048ed4b6 | 4215 | release_sock(sk); |
1da177e4 LT |
4216 | |
4217 | out_nounlock: | |
4218 | return retval; | |
4219 | } | |
4220 | ||
4221 | /* API 3.1.6 connect() - UDP Style Syntax | |
4222 | * | |
4223 | * An application may use the connect() call in the UDP model to initiate an | |
4224 | * association without sending data. | |
4225 | * | |
4226 | * The syntax is: | |
4227 | * | |
4228 | * ret = connect(int sd, const struct sockaddr *nam, socklen_t len); | |
4229 | * | |
4230 | * sd: the socket descriptor to have a new association added to. | |
4231 | * | |
4232 | * nam: the address structure (either struct sockaddr_in or struct | |
4233 | * sockaddr_in6 defined in RFC2553 [7]). | |
4234 | * | |
4235 | * len: the size of the address. | |
4236 | */ | |
dda91928 DB |
4237 | static int sctp_connect(struct sock *sk, struct sockaddr *addr, |
4238 | int addr_len) | |
1da177e4 | 4239 | { |
1da177e4 | 4240 | int err = 0; |
3f7a87d2 | 4241 | struct sctp_af *af; |
1da177e4 | 4242 | |
048ed4b6 | 4243 | lock_sock(sk); |
1da177e4 | 4244 | |
bb33381d DB |
4245 | pr_debug("%s: sk:%p, sockaddr:%p, addr_len:%d\n", __func__, sk, |
4246 | addr, addr_len); | |
1da177e4 | 4247 | |
3f7a87d2 FF |
4248 | /* Validate addr_len before calling common connect/connectx routine. */ |
4249 | af = sctp_get_af_specific(addr->sa_family); | |
4250 | if (!af || addr_len < af->sockaddr_len) { | |
4251 | err = -EINVAL; | |
4252 | } else { | |
4253 | /* Pass correct addr len to common routine (so it knows there | |
4254 | * is only one address being passed. | |
4255 | */ | |
88a0a948 | 4256 | err = __sctp_connect(sk, addr, af->sockaddr_len, NULL); |
1da177e4 LT |
4257 | } |
4258 | ||
048ed4b6 | 4259 | release_sock(sk); |
1da177e4 LT |
4260 | return err; |
4261 | } | |
4262 | ||
4263 | /* FIXME: Write comments. */ | |
dda91928 | 4264 | static int sctp_disconnect(struct sock *sk, int flags) |
1da177e4 LT |
4265 | { |
4266 | return -EOPNOTSUPP; /* STUB */ | |
4267 | } | |
4268 | ||
4269 | /* 4.1.4 accept() - TCP Style Syntax | |
4270 | * | |
4271 | * Applications use accept() call to remove an established SCTP | |
4272 | * association from the accept queue of the endpoint. A new socket | |
4273 | * descriptor will be returned from accept() to represent the newly | |
4274 | * formed association. | |
4275 | */ | |
cdfbabfb | 4276 | static struct sock *sctp_accept(struct sock *sk, int flags, int *err, bool kern) |
1da177e4 LT |
4277 | { |
4278 | struct sctp_sock *sp; | |
4279 | struct sctp_endpoint *ep; | |
4280 | struct sock *newsk = NULL; | |
4281 | struct sctp_association *asoc; | |
4282 | long timeo; | |
4283 | int error = 0; | |
4284 | ||
048ed4b6 | 4285 | lock_sock(sk); |
1da177e4 LT |
4286 | |
4287 | sp = sctp_sk(sk); | |
4288 | ep = sp->ep; | |
4289 | ||
4290 | if (!sctp_style(sk, TCP)) { | |
4291 | error = -EOPNOTSUPP; | |
4292 | goto out; | |
4293 | } | |
4294 | ||
4295 | if (!sctp_sstate(sk, LISTENING)) { | |
4296 | error = -EINVAL; | |
4297 | goto out; | |
4298 | } | |
4299 | ||
8abfedd8 | 4300 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
1da177e4 LT |
4301 | |
4302 | error = sctp_wait_for_accept(sk, timeo); | |
4303 | if (error) | |
4304 | goto out; | |
4305 | ||
4306 | /* We treat the list of associations on the endpoint as the accept | |
4307 | * queue and pick the first association on the list. | |
4308 | */ | |
4309 | asoc = list_entry(ep->asocs.next, struct sctp_association, asocs); | |
4310 | ||
cdfbabfb | 4311 | newsk = sp->pf->create_accept_sk(sk, asoc, kern); |
1da177e4 LT |
4312 | if (!newsk) { |
4313 | error = -ENOMEM; | |
4314 | goto out; | |
4315 | } | |
4316 | ||
4317 | /* Populate the fields of the newsk from the oldsk and migrate the | |
4318 | * asoc to the newsk. | |
4319 | */ | |
4320 | sctp_sock_migrate(sk, newsk, asoc, SCTP_SOCKET_TCP); | |
4321 | ||
4322 | out: | |
048ed4b6 | 4323 | release_sock(sk); |
d808ad9a | 4324 | *err = error; |
1da177e4 LT |
4325 | return newsk; |
4326 | } | |
4327 | ||
4328 | /* The SCTP ioctl handler. */ | |
dda91928 | 4329 | static int sctp_ioctl(struct sock *sk, int cmd, unsigned long arg) |
1da177e4 | 4330 | { |
65040c33 DEFP |
4331 | int rc = -ENOTCONN; |
4332 | ||
048ed4b6 | 4333 | lock_sock(sk); |
65040c33 DEFP |
4334 | |
4335 | /* | |
4336 | * SEQPACKET-style sockets in LISTENING state are valid, for | |
4337 | * SCTP, so only discard TCP-style sockets in LISTENING state. | |
4338 | */ | |
4339 | if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING)) | |
4340 | goto out; | |
4341 | ||
4342 | switch (cmd) { | |
4343 | case SIOCINQ: { | |
4344 | struct sk_buff *skb; | |
4345 | unsigned int amount = 0; | |
4346 | ||
4347 | skb = skb_peek(&sk->sk_receive_queue); | |
4348 | if (skb != NULL) { | |
4349 | /* | |
4350 | * We will only return the amount of this packet since | |
4351 | * that is all that will be read. | |
4352 | */ | |
4353 | amount = skb->len; | |
4354 | } | |
4355 | rc = put_user(amount, (int __user *)arg); | |
65040c33 | 4356 | break; |
9a7241c2 | 4357 | } |
65040c33 DEFP |
4358 | default: |
4359 | rc = -ENOIOCTLCMD; | |
4360 | break; | |
4361 | } | |
4362 | out: | |
048ed4b6 | 4363 | release_sock(sk); |
65040c33 | 4364 | return rc; |
1da177e4 LT |
4365 | } |
4366 | ||
4367 | /* This is the function which gets called during socket creation to | |
4368 | * initialized the SCTP-specific portion of the sock. | |
4369 | * The sock structure should already be zero-filled memory. | |
4370 | */ | |
dda91928 | 4371 | static int sctp_init_sock(struct sock *sk) |
1da177e4 | 4372 | { |
e1fc3b14 | 4373 | struct net *net = sock_net(sk); |
1da177e4 LT |
4374 | struct sctp_sock *sp; |
4375 | ||
bb33381d | 4376 | pr_debug("%s: sk:%p\n", __func__, sk); |
1da177e4 LT |
4377 | |
4378 | sp = sctp_sk(sk); | |
4379 | ||
4380 | /* Initialize the SCTP per socket area. */ | |
4381 | switch (sk->sk_type) { | |
4382 | case SOCK_SEQPACKET: | |
4383 | sp->type = SCTP_SOCKET_UDP; | |
4384 | break; | |
4385 | case SOCK_STREAM: | |
4386 | sp->type = SCTP_SOCKET_TCP; | |
4387 | break; | |
4388 | default: | |
4389 | return -ESOCKTNOSUPPORT; | |
4390 | } | |
4391 | ||
90017acc MRL |
4392 | sk->sk_gso_type = SKB_GSO_SCTP; |
4393 | ||
1da177e4 LT |
4394 | /* Initialize default send parameters. These parameters can be |
4395 | * modified with the SCTP_DEFAULT_SEND_PARAM socket option. | |
4396 | */ | |
4397 | sp->default_stream = 0; | |
4398 | sp->default_ppid = 0; | |
4399 | sp->default_flags = 0; | |
4400 | sp->default_context = 0; | |
4401 | sp->default_timetolive = 0; | |
4402 | ||
6ab792f5 | 4403 | sp->default_rcv_context = 0; |
e1fc3b14 | 4404 | sp->max_burst = net->sctp.max_burst; |
6ab792f5 | 4405 | |
3c68198e NH |
4406 | sp->sctp_hmac_alg = net->sctp.sctp_hmac_alg; |
4407 | ||
1da177e4 LT |
4408 | /* Initialize default setup parameters. These parameters |
4409 | * can be modified with the SCTP_INITMSG socket option or | |
4410 | * overridden by the SCTP_INIT CMSG. | |
4411 | */ | |
4412 | sp->initmsg.sinit_num_ostreams = sctp_max_outstreams; | |
4413 | sp->initmsg.sinit_max_instreams = sctp_max_instreams; | |
e1fc3b14 EB |
4414 | sp->initmsg.sinit_max_attempts = net->sctp.max_retrans_init; |
4415 | sp->initmsg.sinit_max_init_timeo = net->sctp.rto_max; | |
1da177e4 LT |
4416 | |
4417 | /* Initialize default RTO related parameters. These parameters can | |
4418 | * be modified for with the SCTP_RTOINFO socket option. | |
4419 | */ | |
e1fc3b14 EB |
4420 | sp->rtoinfo.srto_initial = net->sctp.rto_initial; |
4421 | sp->rtoinfo.srto_max = net->sctp.rto_max; | |
4422 | sp->rtoinfo.srto_min = net->sctp.rto_min; | |
1da177e4 LT |
4423 | |
4424 | /* Initialize default association related parameters. These parameters | |
4425 | * can be modified with the SCTP_ASSOCINFO socket option. | |
4426 | */ | |
e1fc3b14 | 4427 | sp->assocparams.sasoc_asocmaxrxt = net->sctp.max_retrans_association; |
1da177e4 LT |
4428 | sp->assocparams.sasoc_number_peer_destinations = 0; |
4429 | sp->assocparams.sasoc_peer_rwnd = 0; | |
4430 | sp->assocparams.sasoc_local_rwnd = 0; | |
e1fc3b14 | 4431 | sp->assocparams.sasoc_cookie_life = net->sctp.valid_cookie_life; |
1da177e4 LT |
4432 | |
4433 | /* Initialize default event subscriptions. By default, all the | |
d808ad9a | 4434 | * options are off. |
1da177e4 LT |
4435 | */ |
4436 | memset(&sp->subscribe, 0, sizeof(struct sctp_event_subscribe)); | |
4437 | ||
4438 | /* Default Peer Address Parameters. These defaults can | |
4439 | * be modified via SCTP_PEER_ADDR_PARAMS | |
4440 | */ | |
e1fc3b14 EB |
4441 | sp->hbinterval = net->sctp.hb_interval; |
4442 | sp->pathmaxrxt = net->sctp.max_retrans_path; | |
4e2d52bf | 4443 | sp->pathmtu = 0; /* allow default discovery */ |
e1fc3b14 | 4444 | sp->sackdelay = net->sctp.sack_timeout; |
7bfe8bdb | 4445 | sp->sackfreq = 2; |
52ccb8e9 | 4446 | sp->param_flags = SPP_HB_ENABLE | |
d808ad9a YH |
4447 | SPP_PMTUD_ENABLE | |
4448 | SPP_SACKDELAY_ENABLE; | |
1da177e4 LT |
4449 | |
4450 | /* If enabled no SCTP message fragmentation will be performed. | |
4451 | * Configure through SCTP_DISABLE_FRAGMENTS socket option. | |
4452 | */ | |
4453 | sp->disable_fragments = 0; | |
4454 | ||
208edef6 SS |
4455 | /* Enable Nagle algorithm by default. */ |
4456 | sp->nodelay = 0; | |
1da177e4 | 4457 | |
0d3a421d | 4458 | sp->recvrcvinfo = 0; |
2347c80f | 4459 | sp->recvnxtinfo = 0; |
0d3a421d | 4460 | |
1da177e4 LT |
4461 | /* Enable by default. */ |
4462 | sp->v4mapped = 1; | |
4463 | ||
4464 | /* Auto-close idle associations after the configured | |
4465 | * number of seconds. A value of 0 disables this | |
4466 | * feature. Configure through the SCTP_AUTOCLOSE socket option, | |
4467 | * for UDP-style sockets only. | |
4468 | */ | |
4469 | sp->autoclose = 0; | |
4470 | ||
4471 | /* User specified fragmentation limit. */ | |
4472 | sp->user_frag = 0; | |
4473 | ||
0f3fffd8 | 4474 | sp->adaptation_ind = 0; |
1da177e4 LT |
4475 | |
4476 | sp->pf = sctp_get_pf_specific(sk->sk_family); | |
4477 | ||
4478 | /* Control variables for partial data delivery. */ | |
b6e1331f | 4479 | atomic_set(&sp->pd_mode, 0); |
1da177e4 | 4480 | skb_queue_head_init(&sp->pd_lobby); |
b6e1331f | 4481 | sp->frag_interleave = 0; |
1da177e4 LT |
4482 | |
4483 | /* Create a per socket endpoint structure. Even if we | |
4484 | * change the data structure relationships, this may still | |
4485 | * be useful for storing pre-connect address information. | |
4486 | */ | |
c164b838 DB |
4487 | sp->ep = sctp_endpoint_new(sk, GFP_KERNEL); |
4488 | if (!sp->ep) | |
1da177e4 LT |
4489 | return -ENOMEM; |
4490 | ||
1da177e4 LT |
4491 | sp->hmac = NULL; |
4492 | ||
0a2fbac1 DB |
4493 | sk->sk_destruct = sctp_destruct_sock; |
4494 | ||
1da177e4 | 4495 | SCTP_DBG_OBJCNT_INC(sock); |
6f756a8c DM |
4496 | |
4497 | local_bh_disable(); | |
8cb38a60 | 4498 | sk_sockets_allocated_inc(sk); |
e1fc3b14 | 4499 | sock_prot_inuse_add(net, sk->sk_prot, 1); |
2d45a02d MRL |
4500 | |
4501 | /* Nothing can fail after this block, otherwise | |
4502 | * sctp_destroy_sock() will be called without addr_wq_lock held | |
4503 | */ | |
e1fc3b14 | 4504 | if (net->sctp.default_auto_asconf) { |
2d45a02d | 4505 | spin_lock(&sock_net(sk)->sctp.addr_wq_lock); |
9f7d653b | 4506 | list_add_tail(&sp->auto_asconf_list, |
e1fc3b14 | 4507 | &net->sctp.auto_asconf_splist); |
9f7d653b | 4508 | sp->do_auto_asconf = 1; |
2d45a02d MRL |
4509 | spin_unlock(&sock_net(sk)->sctp.addr_wq_lock); |
4510 | } else { | |
9f7d653b | 4511 | sp->do_auto_asconf = 0; |
2d45a02d MRL |
4512 | } |
4513 | ||
6f756a8c DM |
4514 | local_bh_enable(); |
4515 | ||
1da177e4 LT |
4516 | return 0; |
4517 | } | |
4518 | ||
2d45a02d MRL |
4519 | /* Cleanup any SCTP per socket resources. Must be called with |
4520 | * sock_net(sk)->sctp.addr_wq_lock held if sp->do_auto_asconf is true | |
4521 | */ | |
dda91928 | 4522 | static void sctp_destroy_sock(struct sock *sk) |
1da177e4 | 4523 | { |
9f7d653b | 4524 | struct sctp_sock *sp; |
1da177e4 | 4525 | |
bb33381d | 4526 | pr_debug("%s: sk:%p\n", __func__, sk); |
1da177e4 LT |
4527 | |
4528 | /* Release our hold on the endpoint. */ | |
9f7d653b | 4529 | sp = sctp_sk(sk); |
1abd165e DB |
4530 | /* This could happen during socket init, thus we bail out |
4531 | * early, since the rest of the below is not setup either. | |
4532 | */ | |
4533 | if (sp->ep == NULL) | |
4534 | return; | |
4535 | ||
9f7d653b MH |
4536 | if (sp->do_auto_asconf) { |
4537 | sp->do_auto_asconf = 0; | |
4538 | list_del(&sp->auto_asconf_list); | |
4539 | } | |
4540 | sctp_endpoint_free(sp->ep); | |
5bc0b3bf | 4541 | local_bh_disable(); |
8cb38a60 | 4542 | sk_sockets_allocated_dec(sk); |
9a57f7fa | 4543 | sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); |
5bc0b3bf | 4544 | local_bh_enable(); |
1da177e4 LT |
4545 | } |
4546 | ||
0a2fbac1 DB |
4547 | /* Triggered when there are no references on the socket anymore */ |
4548 | static void sctp_destruct_sock(struct sock *sk) | |
4549 | { | |
4550 | struct sctp_sock *sp = sctp_sk(sk); | |
4551 | ||
4552 | /* Free up the HMAC transform. */ | |
5821c769 | 4553 | crypto_free_shash(sp->hmac); |
0a2fbac1 DB |
4554 | |
4555 | inet_sock_destruct(sk); | |
4556 | } | |
4557 | ||
1da177e4 LT |
4558 | /* API 4.1.7 shutdown() - TCP Style Syntax |
4559 | * int shutdown(int socket, int how); | |
4560 | * | |
4561 | * sd - the socket descriptor of the association to be closed. | |
4562 | * how - Specifies the type of shutdown. The values are | |
4563 | * as follows: | |
4564 | * SHUT_RD | |
4565 | * Disables further receive operations. No SCTP | |
4566 | * protocol action is taken. | |
4567 | * SHUT_WR | |
4568 | * Disables further send operations, and initiates | |
4569 | * the SCTP shutdown sequence. | |
4570 | * SHUT_RDWR | |
4571 | * Disables further send and receive operations | |
4572 | * and initiates the SCTP shutdown sequence. | |
4573 | */ | |
dda91928 | 4574 | static void sctp_shutdown(struct sock *sk, int how) |
1da177e4 | 4575 | { |
55e26eb9 | 4576 | struct net *net = sock_net(sk); |
1da177e4 | 4577 | struct sctp_endpoint *ep; |
1da177e4 LT |
4578 | |
4579 | if (!sctp_style(sk, TCP)) | |
4580 | return; | |
4581 | ||
5bf35ddf XL |
4582 | ep = sctp_sk(sk)->ep; |
4583 | if (how & SEND_SHUTDOWN && !list_empty(&ep->asocs)) { | |
4584 | struct sctp_association *asoc; | |
4585 | ||
cbabf463 | 4586 | inet_sk_set_state(sk, SCTP_SS_CLOSING); |
5bf35ddf XL |
4587 | asoc = list_entry(ep->asocs.next, |
4588 | struct sctp_association, asocs); | |
4589 | sctp_primitive_SHUTDOWN(net, asoc, NULL); | |
1da177e4 LT |
4590 | } |
4591 | } | |
4592 | ||
52c52a61 XL |
4593 | int sctp_get_sctp_info(struct sock *sk, struct sctp_association *asoc, |
4594 | struct sctp_info *info) | |
4595 | { | |
4596 | struct sctp_transport *prim; | |
4597 | struct list_head *pos; | |
4598 | int mask; | |
4599 | ||
4600 | memset(info, 0, sizeof(*info)); | |
4601 | if (!asoc) { | |
4602 | struct sctp_sock *sp = sctp_sk(sk); | |
4603 | ||
4604 | info->sctpi_s_autoclose = sp->autoclose; | |
4605 | info->sctpi_s_adaptation_ind = sp->adaptation_ind; | |
4606 | info->sctpi_s_pd_point = sp->pd_point; | |
4607 | info->sctpi_s_nodelay = sp->nodelay; | |
4608 | info->sctpi_s_disable_fragments = sp->disable_fragments; | |
4609 | info->sctpi_s_v4mapped = sp->v4mapped; | |
4610 | info->sctpi_s_frag_interleave = sp->frag_interleave; | |
40eb90e9 | 4611 | info->sctpi_s_type = sp->type; |
52c52a61 XL |
4612 | |
4613 | return 0; | |
4614 | } | |
4615 | ||
4616 | info->sctpi_tag = asoc->c.my_vtag; | |
4617 | info->sctpi_state = asoc->state; | |
4618 | info->sctpi_rwnd = asoc->a_rwnd; | |
4619 | info->sctpi_unackdata = asoc->unack_data; | |
4620 | info->sctpi_penddata = sctp_tsnmap_pending(&asoc->peer.tsn_map); | |
cee360ab XL |
4621 | info->sctpi_instrms = asoc->stream.incnt; |
4622 | info->sctpi_outstrms = asoc->stream.outcnt; | |
52c52a61 XL |
4623 | list_for_each(pos, &asoc->base.inqueue.in_chunk_list) |
4624 | info->sctpi_inqueue++; | |
4625 | list_for_each(pos, &asoc->outqueue.out_chunk_list) | |
4626 | info->sctpi_outqueue++; | |
4627 | info->sctpi_overall_error = asoc->overall_error_count; | |
4628 | info->sctpi_max_burst = asoc->max_burst; | |
4629 | info->sctpi_maxseg = asoc->frag_point; | |
4630 | info->sctpi_peer_rwnd = asoc->peer.rwnd; | |
4631 | info->sctpi_peer_tag = asoc->c.peer_vtag; | |
4632 | ||
4633 | mask = asoc->peer.ecn_capable << 1; | |
4634 | mask = (mask | asoc->peer.ipv4_address) << 1; | |
4635 | mask = (mask | asoc->peer.ipv6_address) << 1; | |
4636 | mask = (mask | asoc->peer.hostname_address) << 1; | |
4637 | mask = (mask | asoc->peer.asconf_capable) << 1; | |
4638 | mask = (mask | asoc->peer.prsctp_capable) << 1; | |
4639 | mask = (mask | asoc->peer.auth_capable); | |
4640 | info->sctpi_peer_capable = mask; | |
4641 | mask = asoc->peer.sack_needed << 1; | |
4642 | mask = (mask | asoc->peer.sack_generation) << 1; | |
4643 | mask = (mask | asoc->peer.zero_window_announced); | |
4644 | info->sctpi_peer_sack = mask; | |
4645 | ||
4646 | info->sctpi_isacks = asoc->stats.isacks; | |
4647 | info->sctpi_osacks = asoc->stats.osacks; | |
4648 | info->sctpi_opackets = asoc->stats.opackets; | |
4649 | info->sctpi_ipackets = asoc->stats.ipackets; | |
4650 | info->sctpi_rtxchunks = asoc->stats.rtxchunks; | |
4651 | info->sctpi_outofseqtsns = asoc->stats.outofseqtsns; | |
4652 | info->sctpi_idupchunks = asoc->stats.idupchunks; | |
4653 | info->sctpi_gapcnt = asoc->stats.gapcnt; | |
4654 | info->sctpi_ouodchunks = asoc->stats.ouodchunks; | |
4655 | info->sctpi_iuodchunks = asoc->stats.iuodchunks; | |
4656 | info->sctpi_oodchunks = asoc->stats.oodchunks; | |
4657 | info->sctpi_iodchunks = asoc->stats.iodchunks; | |
4658 | info->sctpi_octrlchunks = asoc->stats.octrlchunks; | |
4659 | info->sctpi_ictrlchunks = asoc->stats.ictrlchunks; | |
4660 | ||
4661 | prim = asoc->peer.primary_path; | |
ee6c88bb | 4662 | memcpy(&info->sctpi_p_address, &prim->ipaddr, sizeof(prim->ipaddr)); |
52c52a61 XL |
4663 | info->sctpi_p_state = prim->state; |
4664 | info->sctpi_p_cwnd = prim->cwnd; | |
4665 | info->sctpi_p_srtt = prim->srtt; | |
4666 | info->sctpi_p_rto = jiffies_to_msecs(prim->rto); | |
4667 | info->sctpi_p_hbinterval = prim->hbinterval; | |
4668 | info->sctpi_p_pathmaxrxt = prim->pathmaxrxt; | |
4669 | info->sctpi_p_sackdelay = jiffies_to_msecs(prim->sackdelay); | |
4670 | info->sctpi_p_ssthresh = prim->ssthresh; | |
4671 | info->sctpi_p_partial_bytes_acked = prim->partial_bytes_acked; | |
4672 | info->sctpi_p_flight_size = prim->flight_size; | |
4673 | info->sctpi_p_error = prim->error_count; | |
4674 | ||
4675 | return 0; | |
4676 | } | |
4677 | EXPORT_SYMBOL_GPL(sctp_get_sctp_info); | |
4678 | ||
626d16f5 | 4679 | /* use callback to avoid exporting the core structure */ |
97a6ec4a | 4680 | void sctp_transport_walk_start(struct rhashtable_iter *iter) |
626d16f5 | 4681 | { |
7fda702f | 4682 | rhltable_walk_enter(&sctp_transport_hashtable, iter); |
626d16f5 | 4683 | |
97a6ec4a | 4684 | rhashtable_walk_start(iter); |
626d16f5 XL |
4685 | } |
4686 | ||
4687 | void sctp_transport_walk_stop(struct rhashtable_iter *iter) | |
4688 | { | |
4689 | rhashtable_walk_stop(iter); | |
4690 | rhashtable_walk_exit(iter); | |
4691 | } | |
4692 | ||
4693 | struct sctp_transport *sctp_transport_get_next(struct net *net, | |
4694 | struct rhashtable_iter *iter) | |
4695 | { | |
4696 | struct sctp_transport *t; | |
4697 | ||
4698 | t = rhashtable_walk_next(iter); | |
4699 | for (; t; t = rhashtable_walk_next(iter)) { | |
4700 | if (IS_ERR(t)) { | |
4701 | if (PTR_ERR(t) == -EAGAIN) | |
4702 | continue; | |
4703 | break; | |
4704 | } | |
4705 | ||
4706 | if (net_eq(sock_net(t->asoc->base.sk), net) && | |
4707 | t->asoc->peer.primary_path == t) | |
4708 | break; | |
4709 | } | |
4710 | ||
4711 | return t; | |
4712 | } | |
4713 | ||
4714 | struct sctp_transport *sctp_transport_get_idx(struct net *net, | |
4715 | struct rhashtable_iter *iter, | |
4716 | int pos) | |
4717 | { | |
4718 | void *obj = SEQ_START_TOKEN; | |
4719 | ||
4720 | while (pos && (obj = sctp_transport_get_next(net, iter)) && | |
4721 | !IS_ERR(obj)) | |
4722 | pos--; | |
4723 | ||
4724 | return obj; | |
4725 | } | |
4726 | ||
4727 | int sctp_for_each_endpoint(int (*cb)(struct sctp_endpoint *, void *), | |
4728 | void *p) { | |
4729 | int err = 0; | |
4730 | int hash = 0; | |
4731 | struct sctp_ep_common *epb; | |
4732 | struct sctp_hashbucket *head; | |
4733 | ||
4734 | for (head = sctp_ep_hashtable; hash < sctp_ep_hashsize; | |
4735 | hash++, head++) { | |
581409da | 4736 | read_lock_bh(&head->lock); |
626d16f5 XL |
4737 | sctp_for_each_hentry(epb, &head->chain) { |
4738 | err = cb(sctp_ep(epb), p); | |
4739 | if (err) | |
4740 | break; | |
4741 | } | |
581409da | 4742 | read_unlock_bh(&head->lock); |
626d16f5 XL |
4743 | } |
4744 | ||
4745 | return err; | |
4746 | } | |
4747 | EXPORT_SYMBOL_GPL(sctp_for_each_endpoint); | |
4748 | ||
4749 | int sctp_transport_lookup_process(int (*cb)(struct sctp_transport *, void *), | |
4750 | struct net *net, | |
4751 | const union sctp_addr *laddr, | |
4752 | const union sctp_addr *paddr, void *p) | |
4753 | { | |
4754 | struct sctp_transport *transport; | |
08abb795 | 4755 | int err; |
626d16f5 XL |
4756 | |
4757 | rcu_read_lock(); | |
4758 | transport = sctp_addrs_lookup_transport(net, laddr, paddr); | |
08abb795 | 4759 | rcu_read_unlock(); |
7fda702f | 4760 | if (!transport) |
08abb795 | 4761 | return -ENOENT; |
1cceda78 | 4762 | |
1cceda78 | 4763 | err = cb(transport, p); |
cd26da4f | 4764 | sctp_transport_put(transport); |
1cceda78 | 4765 | |
626d16f5 XL |
4766 | return err; |
4767 | } | |
4768 | EXPORT_SYMBOL_GPL(sctp_transport_lookup_process); | |
4769 | ||
4770 | int sctp_for_each_transport(int (*cb)(struct sctp_transport *, void *), | |
d25adbeb XL |
4771 | int (*cb_done)(struct sctp_transport *, void *), |
4772 | struct net *net, int *pos, void *p) { | |
626d16f5 | 4773 | struct rhashtable_iter hti; |
d25adbeb XL |
4774 | struct sctp_transport *tsp; |
4775 | int ret; | |
626d16f5 | 4776 | |
d25adbeb | 4777 | again: |
f53d77e1 | 4778 | ret = 0; |
97a6ec4a | 4779 | sctp_transport_walk_start(&hti); |
626d16f5 | 4780 | |
d25adbeb XL |
4781 | tsp = sctp_transport_get_idx(net, &hti, *pos + 1); |
4782 | for (; !IS_ERR_OR_NULL(tsp); tsp = sctp_transport_get_next(net, &hti)) { | |
4783 | if (!sctp_transport_hold(tsp)) | |
626d16f5 | 4784 | continue; |
d25adbeb XL |
4785 | ret = cb(tsp, p); |
4786 | if (ret) | |
626d16f5 | 4787 | break; |
d25adbeb XL |
4788 | (*pos)++; |
4789 | sctp_transport_put(tsp); | |
626d16f5 | 4790 | } |
626d16f5 | 4791 | sctp_transport_walk_stop(&hti); |
53fa1036 | 4792 | |
d25adbeb XL |
4793 | if (ret) { |
4794 | if (cb_done && !cb_done(tsp, p)) { | |
4795 | (*pos)++; | |
4796 | sctp_transport_put(tsp); | |
4797 | goto again; | |
4798 | } | |
4799 | sctp_transport_put(tsp); | |
4800 | } | |
4801 | ||
4802 | return ret; | |
626d16f5 XL |
4803 | } |
4804 | EXPORT_SYMBOL_GPL(sctp_for_each_transport); | |
4805 | ||
1da177e4 LT |
4806 | /* 7.2.1 Association Status (SCTP_STATUS) |
4807 | ||
4808 | * Applications can retrieve current status information about an | |
4809 | * association, including association state, peer receiver window size, | |
4810 | * number of unacked data chunks, and number of data chunks pending | |
4811 | * receipt. This information is read-only. | |
4812 | */ | |
4813 | static int sctp_getsockopt_sctp_status(struct sock *sk, int len, | |
4814 | char __user *optval, | |
4815 | int __user *optlen) | |
4816 | { | |
4817 | struct sctp_status status; | |
4818 | struct sctp_association *asoc = NULL; | |
4819 | struct sctp_transport *transport; | |
4820 | sctp_assoc_t associd; | |
4821 | int retval = 0; | |
4822 | ||
408f22e8 | 4823 | if (len < sizeof(status)) { |
1da177e4 LT |
4824 | retval = -EINVAL; |
4825 | goto out; | |
4826 | } | |
4827 | ||
408f22e8 NH |
4828 | len = sizeof(status); |
4829 | if (copy_from_user(&status, optval, len)) { | |
1da177e4 LT |
4830 | retval = -EFAULT; |
4831 | goto out; | |
4832 | } | |
4833 | ||
4834 | associd = status.sstat_assoc_id; | |
4835 | asoc = sctp_id2assoc(sk, associd); | |
4836 | if (!asoc) { | |
4837 | retval = -EINVAL; | |
4838 | goto out; | |
4839 | } | |
4840 | ||
4841 | transport = asoc->peer.primary_path; | |
4842 | ||
4843 | status.sstat_assoc_id = sctp_assoc2id(asoc); | |
38ab1fa9 | 4844 | status.sstat_state = sctp_assoc_to_state(asoc); |
1da177e4 LT |
4845 | status.sstat_rwnd = asoc->peer.rwnd; |
4846 | status.sstat_unackdata = asoc->unack_data; | |
4847 | ||
4848 | status.sstat_penddata = sctp_tsnmap_pending(&asoc->peer.tsn_map); | |
cee360ab XL |
4849 | status.sstat_instrms = asoc->stream.incnt; |
4850 | status.sstat_outstrms = asoc->stream.outcnt; | |
1da177e4 LT |
4851 | status.sstat_fragmentation_point = asoc->frag_point; |
4852 | status.sstat_primary.spinfo_assoc_id = sctp_assoc2id(transport->asoc); | |
8cec6b80 AV |
4853 | memcpy(&status.sstat_primary.spinfo_address, &transport->ipaddr, |
4854 | transport->af_specific->sockaddr_len); | |
1da177e4 | 4855 | /* Map ipv4 address into v4-mapped-on-v6 address. */ |
299ee123 | 4856 | sctp_get_pf_specific(sk->sk_family)->addr_to_user(sctp_sk(sk), |
1da177e4 | 4857 | (union sctp_addr *)&status.sstat_primary.spinfo_address); |
3f7a87d2 | 4858 | status.sstat_primary.spinfo_state = transport->state; |
1da177e4 LT |
4859 | status.sstat_primary.spinfo_cwnd = transport->cwnd; |
4860 | status.sstat_primary.spinfo_srtt = transport->srtt; | |
4861 | status.sstat_primary.spinfo_rto = jiffies_to_msecs(transport->rto); | |
52ccb8e9 | 4862 | status.sstat_primary.spinfo_mtu = transport->pathmtu; |
1da177e4 | 4863 | |
3f7a87d2 FF |
4864 | if (status.sstat_primary.spinfo_state == SCTP_UNKNOWN) |
4865 | status.sstat_primary.spinfo_state = SCTP_ACTIVE; | |
4866 | ||
1da177e4 LT |
4867 | if (put_user(len, optlen)) { |
4868 | retval = -EFAULT; | |
4869 | goto out; | |
4870 | } | |
4871 | ||
bb33381d DB |
4872 | pr_debug("%s: len:%d, state:%d, rwnd:%d, assoc_id:%d\n", |
4873 | __func__, len, status.sstat_state, status.sstat_rwnd, | |
4874 | status.sstat_assoc_id); | |
1da177e4 LT |
4875 | |
4876 | if (copy_to_user(optval, &status, len)) { | |
4877 | retval = -EFAULT; | |
4878 | goto out; | |
4879 | } | |
4880 | ||
4881 | out: | |
a02cec21 | 4882 | return retval; |
1da177e4 LT |
4883 | } |
4884 | ||
4885 | ||
4886 | /* 7.2.2 Peer Address Information (SCTP_GET_PEER_ADDR_INFO) | |
4887 | * | |
4888 | * Applications can retrieve information about a specific peer address | |
4889 | * of an association, including its reachability state, congestion | |
4890 | * window, and retransmission timer values. This information is | |
4891 | * read-only. | |
4892 | */ | |
4893 | static int sctp_getsockopt_peer_addr_info(struct sock *sk, int len, | |
4894 | char __user *optval, | |
4895 | int __user *optlen) | |
4896 | { | |
4897 | struct sctp_paddrinfo pinfo; | |
4898 | struct sctp_transport *transport; | |
4899 | int retval = 0; | |
4900 | ||
408f22e8 | 4901 | if (len < sizeof(pinfo)) { |
1da177e4 LT |
4902 | retval = -EINVAL; |
4903 | goto out; | |
4904 | } | |
4905 | ||
408f22e8 NH |
4906 | len = sizeof(pinfo); |
4907 | if (copy_from_user(&pinfo, optval, len)) { | |
1da177e4 LT |
4908 | retval = -EFAULT; |
4909 | goto out; | |
4910 | } | |
4911 | ||
4912 | transport = sctp_addr_id2transport(sk, &pinfo.spinfo_address, | |
4913 | pinfo.spinfo_assoc_id); | |
4914 | if (!transport) | |
4915 | return -EINVAL; | |
4916 | ||
4917 | pinfo.spinfo_assoc_id = sctp_assoc2id(transport->asoc); | |
3f7a87d2 | 4918 | pinfo.spinfo_state = transport->state; |
1da177e4 LT |
4919 | pinfo.spinfo_cwnd = transport->cwnd; |
4920 | pinfo.spinfo_srtt = transport->srtt; | |
4921 | pinfo.spinfo_rto = jiffies_to_msecs(transport->rto); | |
52ccb8e9 | 4922 | pinfo.spinfo_mtu = transport->pathmtu; |
1da177e4 | 4923 | |
3f7a87d2 FF |
4924 | if (pinfo.spinfo_state == SCTP_UNKNOWN) |
4925 | pinfo.spinfo_state = SCTP_ACTIVE; | |
4926 | ||
1da177e4 LT |
4927 | if (put_user(len, optlen)) { |
4928 | retval = -EFAULT; | |
4929 | goto out; | |
4930 | } | |
4931 | ||
4932 | if (copy_to_user(optval, &pinfo, len)) { | |
4933 | retval = -EFAULT; | |
4934 | goto out; | |
4935 | } | |
4936 | ||
4937 | out: | |
a02cec21 | 4938 | return retval; |
1da177e4 LT |
4939 | } |
4940 | ||
4941 | /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS) | |
4942 | * | |
4943 | * This option is a on/off flag. If enabled no SCTP message | |
4944 | * fragmentation will be performed. Instead if a message being sent | |
4945 | * exceeds the current PMTU size, the message will NOT be sent and | |
4946 | * instead a error will be indicated to the user. | |
4947 | */ | |
4948 | static int sctp_getsockopt_disable_fragments(struct sock *sk, int len, | |
4949 | char __user *optval, int __user *optlen) | |
4950 | { | |
4951 | int val; | |
4952 | ||
4953 | if (len < sizeof(int)) | |
4954 | return -EINVAL; | |
4955 | ||
4956 | len = sizeof(int); | |
4957 | val = (sctp_sk(sk)->disable_fragments == 1); | |
4958 | if (put_user(len, optlen)) | |
4959 | return -EFAULT; | |
4960 | if (copy_to_user(optval, &val, len)) | |
4961 | return -EFAULT; | |
4962 | return 0; | |
4963 | } | |
4964 | ||
4965 | /* 7.1.15 Set notification and ancillary events (SCTP_EVENTS) | |
4966 | * | |
4967 | * This socket option is used to specify various notifications and | |
4968 | * ancillary data the user wishes to receive. | |
4969 | */ | |
4970 | static int sctp_getsockopt_events(struct sock *sk, int len, char __user *optval, | |
4971 | int __user *optlen) | |
4972 | { | |
a4b8e71b | 4973 | if (len == 0) |
1da177e4 | 4974 | return -EINVAL; |
acdd5985 TG |
4975 | if (len > sizeof(struct sctp_event_subscribe)) |
4976 | len = sizeof(struct sctp_event_subscribe); | |
408f22e8 NH |
4977 | if (put_user(len, optlen)) |
4978 | return -EFAULT; | |
1da177e4 LT |
4979 | if (copy_to_user(optval, &sctp_sk(sk)->subscribe, len)) |
4980 | return -EFAULT; | |
4981 | return 0; | |
4982 | } | |
4983 | ||
4984 | /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE) | |
4985 | * | |
4986 | * This socket option is applicable to the UDP-style socket only. When | |
4987 | * set it will cause associations that are idle for more than the | |
4988 | * specified number of seconds to automatically close. An association | |
4989 | * being idle is defined an association that has NOT sent or received | |
4990 | * user data. The special value of '0' indicates that no automatic | |
4991 | * close of any associations should be performed. The option expects an | |
4992 | * integer defining the number of seconds of idle time before an | |
4993 | * association is closed. | |
4994 | */ | |
4995 | static int sctp_getsockopt_autoclose(struct sock *sk, int len, char __user *optval, int __user *optlen) | |
4996 | { | |
4997 | /* Applicable to UDP-style socket only */ | |
4998 | if (sctp_style(sk, TCP)) | |
4999 | return -EOPNOTSUPP; | |
408f22e8 | 5000 | if (len < sizeof(int)) |
1da177e4 | 5001 | return -EINVAL; |
408f22e8 NH |
5002 | len = sizeof(int); |
5003 | if (put_user(len, optlen)) | |
5004 | return -EFAULT; | |
b2ce04c2 | 5005 | if (put_user(sctp_sk(sk)->autoclose, (int __user *)optval)) |
1da177e4 LT |
5006 | return -EFAULT; |
5007 | return 0; | |
5008 | } | |
5009 | ||
5010 | /* Helper routine to branch off an association to a new socket. */ | |
0343c554 | 5011 | int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp) |
1da177e4 | 5012 | { |
0343c554 | 5013 | struct sctp_association *asoc = sctp_id2assoc(sk, id); |
299ee123 | 5014 | struct sctp_sock *sp = sctp_sk(sk); |
1da177e4 LT |
5015 | struct socket *sock; |
5016 | int err = 0; | |
5017 | ||
df80cd9b XL |
5018 | /* Do not peel off from one netns to another one. */ |
5019 | if (!net_eq(current->nsproxy->net_ns, sock_net(sk))) | |
5020 | return -EINVAL; | |
5021 | ||
0343c554 BP |
5022 | if (!asoc) |
5023 | return -EINVAL; | |
5024 | ||
1da177e4 LT |
5025 | /* An association cannot be branched off from an already peeled-off |
5026 | * socket, nor is this supported for tcp style sockets. | |
5027 | */ | |
5028 | if (!sctp_style(sk, UDP)) | |
5029 | return -EINVAL; | |
5030 | ||
5031 | /* Create a new socket. */ | |
5032 | err = sock_create(sk->sk_family, SOCK_SEQPACKET, IPPROTO_SCTP, &sock); | |
5033 | if (err < 0) | |
5034 | return err; | |
5035 | ||
914e1c8b | 5036 | sctp_copy_sock(sock->sk, sk, asoc); |
4f444308 VY |
5037 | |
5038 | /* Make peeled-off sockets more like 1-1 accepted sockets. | |
5039 | * Set the daddr and initialize id to something more random | |
5040 | */ | |
299ee123 | 5041 | sp->pf->to_sk_daddr(&asoc->peer.primary_addr, sk); |
914e1c8b VY |
5042 | |
5043 | /* Populate the fields of the newsk from the oldsk and migrate the | |
5044 | * asoc to the newsk. | |
5045 | */ | |
5046 | sctp_sock_migrate(sk, sock->sk, asoc, SCTP_SOCKET_UDP_HIGH_BANDWIDTH); | |
4f444308 | 5047 | |
1da177e4 LT |
5048 | *sockp = sock; |
5049 | ||
5050 | return err; | |
5051 | } | |
0343c554 | 5052 | EXPORT_SYMBOL(sctp_do_peeloff); |
1da177e4 | 5053 | |
2cb5c8e3 NH |
5054 | static int sctp_getsockopt_peeloff_common(struct sock *sk, sctp_peeloff_arg_t *peeloff, |
5055 | struct file **newfile, unsigned flags) | |
5056 | { | |
5057 | struct socket *newsock; | |
5058 | int retval; | |
5059 | ||
5060 | retval = sctp_do_peeloff(sk, peeloff->associd, &newsock); | |
5061 | if (retval < 0) | |
5062 | goto out; | |
5063 | ||
5064 | /* Map the socket to an unused fd that can be returned to the user. */ | |
5065 | retval = get_unused_fd_flags(flags & SOCK_CLOEXEC); | |
5066 | if (retval < 0) { | |
5067 | sock_release(newsock); | |
5068 | goto out; | |
5069 | } | |
5070 | ||
5071 | *newfile = sock_alloc_file(newsock, 0, NULL); | |
5072 | if (IS_ERR(*newfile)) { | |
5073 | put_unused_fd(retval); | |
2cb5c8e3 NH |
5074 | retval = PTR_ERR(*newfile); |
5075 | *newfile = NULL; | |
5076 | return retval; | |
5077 | } | |
5078 | ||
5079 | pr_debug("%s: sk:%p, newsk:%p, sd:%d\n", __func__, sk, newsock->sk, | |
5080 | retval); | |
5081 | ||
5082 | peeloff->sd = retval; | |
5083 | ||
5084 | if (flags & SOCK_NONBLOCK) | |
5085 | (*newfile)->f_flags |= O_NONBLOCK; | |
5086 | out: | |
5087 | return retval; | |
5088 | } | |
5089 | ||
1da177e4 LT |
5090 | static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval, int __user *optlen) |
5091 | { | |
5092 | sctp_peeloff_arg_t peeloff; | |
2cb5c8e3 | 5093 | struct file *newfile = NULL; |
1da177e4 | 5094 | int retval = 0; |
1da177e4 | 5095 | |
408f22e8 | 5096 | if (len < sizeof(sctp_peeloff_arg_t)) |
1da177e4 | 5097 | return -EINVAL; |
408f22e8 | 5098 | len = sizeof(sctp_peeloff_arg_t); |
1da177e4 LT |
5099 | if (copy_from_user(&peeloff, optval, len)) |
5100 | return -EFAULT; | |
5101 | ||
2cb5c8e3 | 5102 | retval = sctp_getsockopt_peeloff_common(sk, &peeloff, &newfile, 0); |
1da177e4 LT |
5103 | if (retval < 0) |
5104 | goto out; | |
5105 | ||
2cb5c8e3 NH |
5106 | /* Return the fd mapped to the new socket. */ |
5107 | if (put_user(len, optlen)) { | |
5108 | fput(newfile); | |
5109 | put_unused_fd(retval); | |
5110 | return -EFAULT; | |
1da177e4 LT |
5111 | } |
5112 | ||
2cb5c8e3 NH |
5113 | if (copy_to_user(optval, &peeloff, len)) { |
5114 | fput(newfile); | |
56b31d1c | 5115 | put_unused_fd(retval); |
2cb5c8e3 | 5116 | return -EFAULT; |
56b31d1c | 5117 | } |
2cb5c8e3 NH |
5118 | fd_install(retval, newfile); |
5119 | out: | |
5120 | return retval; | |
5121 | } | |
56b31d1c | 5122 | |
2cb5c8e3 NH |
5123 | static int sctp_getsockopt_peeloff_flags(struct sock *sk, int len, |
5124 | char __user *optval, int __user *optlen) | |
5125 | { | |
5126 | sctp_peeloff_flags_arg_t peeloff; | |
5127 | struct file *newfile = NULL; | |
5128 | int retval = 0; | |
5129 | ||
5130 | if (len < sizeof(sctp_peeloff_flags_arg_t)) | |
5131 | return -EINVAL; | |
5132 | len = sizeof(sctp_peeloff_flags_arg_t); | |
5133 | if (copy_from_user(&peeloff, optval, len)) | |
5134 | return -EFAULT; | |
5135 | ||
5136 | retval = sctp_getsockopt_peeloff_common(sk, &peeloff.p_arg, | |
5137 | &newfile, peeloff.flags); | |
5138 | if (retval < 0) | |
5139 | goto out; | |
1da177e4 LT |
5140 | |
5141 | /* Return the fd mapped to the new socket. */ | |
56b31d1c AV |
5142 | if (put_user(len, optlen)) { |
5143 | fput(newfile); | |
5144 | put_unused_fd(retval); | |
5145 | return -EFAULT; | |
5146 | } | |
2cb5c8e3 | 5147 | |
56b31d1c AV |
5148 | if (copy_to_user(optval, &peeloff, len)) { |
5149 | fput(newfile); | |
5150 | put_unused_fd(retval); | |
408f22e8 | 5151 | return -EFAULT; |
56b31d1c AV |
5152 | } |
5153 | fd_install(retval, newfile); | |
1da177e4 LT |
5154 | out: |
5155 | return retval; | |
5156 | } | |
5157 | ||
5158 | /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS) | |
5159 | * | |
5160 | * Applications can enable or disable heartbeats for any peer address of | |
5161 | * an association, modify an address's heartbeat interval, force a | |
5162 | * heartbeat to be sent immediately, and adjust the address's maximum | |
5163 | * number of retransmissions sent before an address is considered | |
5164 | * unreachable. The following structure is used to access and modify an | |
5165 | * address's parameters: | |
5166 | * | |
5167 | * struct sctp_paddrparams { | |
52ccb8e9 FF |
5168 | * sctp_assoc_t spp_assoc_id; |
5169 | * struct sockaddr_storage spp_address; | |
5170 | * uint32_t spp_hbinterval; | |
5171 | * uint16_t spp_pathmaxrxt; | |
5172 | * uint32_t spp_pathmtu; | |
5173 | * uint32_t spp_sackdelay; | |
5174 | * uint32_t spp_flags; | |
5175 | * }; | |
5176 | * | |
5177 | * spp_assoc_id - (one-to-many style socket) This is filled in the | |
5178 | * application, and identifies the association for | |
5179 | * this query. | |
1da177e4 LT |
5180 | * spp_address - This specifies which address is of interest. |
5181 | * spp_hbinterval - This contains the value of the heartbeat interval, | |
52ccb8e9 FF |
5182 | * in milliseconds. If a value of zero |
5183 | * is present in this field then no changes are to | |
5184 | * be made to this parameter. | |
1da177e4 LT |
5185 | * spp_pathmaxrxt - This contains the maximum number of |
5186 | * retransmissions before this address shall be | |
52ccb8e9 FF |
5187 | * considered unreachable. If a value of zero |
5188 | * is present in this field then no changes are to | |
5189 | * be made to this parameter. | |
5190 | * spp_pathmtu - When Path MTU discovery is disabled the value | |
5191 | * specified here will be the "fixed" path mtu. | |
5192 | * Note that if the spp_address field is empty | |
5193 | * then all associations on this address will | |
5194 | * have this fixed path mtu set upon them. | |
5195 | * | |
5196 | * spp_sackdelay - When delayed sack is enabled, this value specifies | |
5197 | * the number of milliseconds that sacks will be delayed | |
5198 | * for. This value will apply to all addresses of an | |
5199 | * association if the spp_address field is empty. Note | |
5200 | * also, that if delayed sack is enabled and this | |
5201 | * value is set to 0, no change is made to the last | |
5202 | * recorded delayed sack timer value. | |
5203 | * | |
5204 | * spp_flags - These flags are used to control various features | |
5205 | * on an association. The flag field may contain | |
5206 | * zero or more of the following options. | |
5207 | * | |
5208 | * SPP_HB_ENABLE - Enable heartbeats on the | |
5209 | * specified address. Note that if the address | |
5210 | * field is empty all addresses for the association | |
5211 | * have heartbeats enabled upon them. | |
5212 | * | |
5213 | * SPP_HB_DISABLE - Disable heartbeats on the | |
5214 | * speicifed address. Note that if the address | |
5215 | * field is empty all addresses for the association | |
5216 | * will have their heartbeats disabled. Note also | |
5217 | * that SPP_HB_ENABLE and SPP_HB_DISABLE are | |
5218 | * mutually exclusive, only one of these two should | |
5219 | * be specified. Enabling both fields will have | |
5220 | * undetermined results. | |
5221 | * | |
5222 | * SPP_HB_DEMAND - Request a user initiated heartbeat | |
5223 | * to be made immediately. | |
5224 | * | |
5225 | * SPP_PMTUD_ENABLE - This field will enable PMTU | |
5226 | * discovery upon the specified address. Note that | |
5227 | * if the address feild is empty then all addresses | |
5228 | * on the association are effected. | |
5229 | * | |
5230 | * SPP_PMTUD_DISABLE - This field will disable PMTU | |
5231 | * discovery upon the specified address. Note that | |
5232 | * if the address feild is empty then all addresses | |
5233 | * on the association are effected. Not also that | |
5234 | * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually | |
5235 | * exclusive. Enabling both will have undetermined | |
5236 | * results. | |
5237 | * | |
5238 | * SPP_SACKDELAY_ENABLE - Setting this flag turns | |
5239 | * on delayed sack. The time specified in spp_sackdelay | |
5240 | * is used to specify the sack delay for this address. Note | |
5241 | * that if spp_address is empty then all addresses will | |
5242 | * enable delayed sack and take on the sack delay | |
5243 | * value specified in spp_sackdelay. | |
5244 | * SPP_SACKDELAY_DISABLE - Setting this flag turns | |
5245 | * off delayed sack. If the spp_address field is blank then | |
5246 | * delayed sack is disabled for the entire association. Note | |
5247 | * also that this field is mutually exclusive to | |
5248 | * SPP_SACKDELAY_ENABLE, setting both will have undefined | |
5249 | * results. | |
1da177e4 LT |
5250 | */ |
5251 | static int sctp_getsockopt_peer_addr_params(struct sock *sk, int len, | |
52ccb8e9 | 5252 | char __user *optval, int __user *optlen) |
1da177e4 | 5253 | { |
52ccb8e9 FF |
5254 | struct sctp_paddrparams params; |
5255 | struct sctp_transport *trans = NULL; | |
5256 | struct sctp_association *asoc = NULL; | |
5257 | struct sctp_sock *sp = sctp_sk(sk); | |
1da177e4 | 5258 | |
408f22e8 | 5259 | if (len < sizeof(struct sctp_paddrparams)) |
1da177e4 | 5260 | return -EINVAL; |
408f22e8 | 5261 | len = sizeof(struct sctp_paddrparams); |
1da177e4 LT |
5262 | if (copy_from_user(¶ms, optval, len)) |
5263 | return -EFAULT; | |
5264 | ||
52ccb8e9 FF |
5265 | /* If an address other than INADDR_ANY is specified, and |
5266 | * no transport is found, then the request is invalid. | |
1da177e4 | 5267 | */ |
cb3f837b | 5268 | if (!sctp_is_any(sk, (union sctp_addr *)¶ms.spp_address)) { |
52ccb8e9 FF |
5269 | trans = sctp_addr_id2transport(sk, ¶ms.spp_address, |
5270 | params.spp_assoc_id); | |
5271 | if (!trans) { | |
bb33381d | 5272 | pr_debug("%s: failed no transport\n", __func__); |
52ccb8e9 FF |
5273 | return -EINVAL; |
5274 | } | |
1da177e4 LT |
5275 | } |
5276 | ||
52ccb8e9 FF |
5277 | /* Get association, if assoc_id != 0 and the socket is a one |
5278 | * to many style socket, and an association was not found, then | |
5279 | * the id was invalid. | |
5280 | */ | |
5281 | asoc = sctp_id2assoc(sk, params.spp_assoc_id); | |
5282 | if (!asoc && params.spp_assoc_id && sctp_style(sk, UDP)) { | |
bb33381d | 5283 | pr_debug("%s: failed no association\n", __func__); |
1da177e4 | 5284 | return -EINVAL; |
52ccb8e9 | 5285 | } |
1da177e4 | 5286 | |
52ccb8e9 FF |
5287 | if (trans) { |
5288 | /* Fetch transport values. */ | |
5289 | params.spp_hbinterval = jiffies_to_msecs(trans->hbinterval); | |
5290 | params.spp_pathmtu = trans->pathmtu; | |
5291 | params.spp_pathmaxrxt = trans->pathmaxrxt; | |
5292 | params.spp_sackdelay = jiffies_to_msecs(trans->sackdelay); | |
5293 | ||
5294 | /*draft-11 doesn't say what to return in spp_flags*/ | |
5295 | params.spp_flags = trans->param_flags; | |
5296 | } else if (asoc) { | |
5297 | /* Fetch association values. */ | |
5298 | params.spp_hbinterval = jiffies_to_msecs(asoc->hbinterval); | |
5299 | params.spp_pathmtu = asoc->pathmtu; | |
5300 | params.spp_pathmaxrxt = asoc->pathmaxrxt; | |
5301 | params.spp_sackdelay = jiffies_to_msecs(asoc->sackdelay); | |
5302 | ||
5303 | /*draft-11 doesn't say what to return in spp_flags*/ | |
5304 | params.spp_flags = asoc->param_flags; | |
5305 | } else { | |
5306 | /* Fetch socket values. */ | |
5307 | params.spp_hbinterval = sp->hbinterval; | |
5308 | params.spp_pathmtu = sp->pathmtu; | |
5309 | params.spp_sackdelay = sp->sackdelay; | |
5310 | params.spp_pathmaxrxt = sp->pathmaxrxt; | |
1da177e4 | 5311 | |
52ccb8e9 FF |
5312 | /*draft-11 doesn't say what to return in spp_flags*/ |
5313 | params.spp_flags = sp->param_flags; | |
5314 | } | |
1da177e4 | 5315 | |
1da177e4 LT |
5316 | if (copy_to_user(optval, ¶ms, len)) |
5317 | return -EFAULT; | |
5318 | ||
5319 | if (put_user(len, optlen)) | |
5320 | return -EFAULT; | |
5321 | ||
5322 | return 0; | |
5323 | } | |
5324 | ||
d364d927 WY |
5325 | /* |
5326 | * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK) | |
5327 | * | |
5328 | * This option will effect the way delayed acks are performed. This | |
5329 | * option allows you to get or set the delayed ack time, in | |
5330 | * milliseconds. It also allows changing the delayed ack frequency. | |
5331 | * Changing the frequency to 1 disables the delayed sack algorithm. If | |
5332 | * the assoc_id is 0, then this sets or gets the endpoints default | |
5333 | * values. If the assoc_id field is non-zero, then the set or get | |
5334 | * effects the specified association for the one to many model (the | |
5335 | * assoc_id field is ignored by the one to one model). Note that if | |
5336 | * sack_delay or sack_freq are 0 when setting this option, then the | |
5337 | * current values will remain unchanged. | |
5338 | * | |
5339 | * struct sctp_sack_info { | |
5340 | * sctp_assoc_t sack_assoc_id; | |
5341 | * uint32_t sack_delay; | |
5342 | * uint32_t sack_freq; | |
5343 | * }; | |
7708610b | 5344 | * |
d364d927 WY |
5345 | * sack_assoc_id - This parameter, indicates which association the user |
5346 | * is performing an action upon. Note that if this field's value is | |
5347 | * zero then the endpoints default value is changed (effecting future | |
5348 | * associations only). | |
7708610b | 5349 | * |
d364d927 WY |
5350 | * sack_delay - This parameter contains the number of milliseconds that |
5351 | * the user is requesting the delayed ACK timer be set to. Note that | |
5352 | * this value is defined in the standard to be between 200 and 500 | |
5353 | * milliseconds. | |
7708610b | 5354 | * |
d364d927 WY |
5355 | * sack_freq - This parameter contains the number of packets that must |
5356 | * be received before a sack is sent without waiting for the delay | |
5357 | * timer to expire. The default value for this is 2, setting this | |
5358 | * value to 1 will disable the delayed sack algorithm. | |
7708610b | 5359 | */ |
d364d927 | 5360 | static int sctp_getsockopt_delayed_ack(struct sock *sk, int len, |
7708610b FF |
5361 | char __user *optval, |
5362 | int __user *optlen) | |
5363 | { | |
d364d927 | 5364 | struct sctp_sack_info params; |
7708610b FF |
5365 | struct sctp_association *asoc = NULL; |
5366 | struct sctp_sock *sp = sctp_sk(sk); | |
5367 | ||
d364d927 WY |
5368 | if (len >= sizeof(struct sctp_sack_info)) { |
5369 | len = sizeof(struct sctp_sack_info); | |
7708610b | 5370 | |
d364d927 WY |
5371 | if (copy_from_user(¶ms, optval, len)) |
5372 | return -EFAULT; | |
5373 | } else if (len == sizeof(struct sctp_assoc_value)) { | |
94f65193 | 5374 | pr_warn_ratelimited(DEPRECATED |
f916ec96 | 5375 | "%s (pid %d) " |
94f65193 | 5376 | "Use of struct sctp_assoc_value in delayed_ack socket option.\n" |
f916ec96 NH |
5377 | "Use struct sctp_sack_info instead\n", |
5378 | current->comm, task_pid_nr(current)); | |
d364d927 WY |
5379 | if (copy_from_user(¶ms, optval, len)) |
5380 | return -EFAULT; | |
5381 | } else | |
cb3f837b | 5382 | return -EINVAL; |
7708610b | 5383 | |
d364d927 | 5384 | /* Get association, if sack_assoc_id != 0 and the socket is a one |
7708610b FF |
5385 | * to many style socket, and an association was not found, then |
5386 | * the id was invalid. | |
d808ad9a | 5387 | */ |
d364d927 WY |
5388 | asoc = sctp_id2assoc(sk, params.sack_assoc_id); |
5389 | if (!asoc && params.sack_assoc_id && sctp_style(sk, UDP)) | |
7708610b FF |
5390 | return -EINVAL; |
5391 | ||
5392 | if (asoc) { | |
5393 | /* Fetch association values. */ | |
d364d927 WY |
5394 | if (asoc->param_flags & SPP_SACKDELAY_ENABLE) { |
5395 | params.sack_delay = jiffies_to_msecs( | |
7708610b | 5396 | asoc->sackdelay); |
d364d927 WY |
5397 | params.sack_freq = asoc->sackfreq; |
5398 | ||
5399 | } else { | |
5400 | params.sack_delay = 0; | |
5401 | params.sack_freq = 1; | |
5402 | } | |
7708610b FF |
5403 | } else { |
5404 | /* Fetch socket values. */ | |
d364d927 WY |
5405 | if (sp->param_flags & SPP_SACKDELAY_ENABLE) { |
5406 | params.sack_delay = sp->sackdelay; | |
5407 | params.sack_freq = sp->sackfreq; | |
5408 | } else { | |
5409 | params.sack_delay = 0; | |
5410 | params.sack_freq = 1; | |
5411 | } | |
7708610b FF |
5412 | } |
5413 | ||
5414 | if (copy_to_user(optval, ¶ms, len)) | |
5415 | return -EFAULT; | |
5416 | ||
5417 | if (put_user(len, optlen)) | |
5418 | return -EFAULT; | |
5419 | ||
5420 | return 0; | |
5421 | } | |
5422 | ||
1da177e4 LT |
5423 | /* 7.1.3 Initialization Parameters (SCTP_INITMSG) |
5424 | * | |
5425 | * Applications can specify protocol parameters for the default association | |
5426 | * initialization. The option name argument to setsockopt() and getsockopt() | |
5427 | * is SCTP_INITMSG. | |
5428 | * | |
5429 | * Setting initialization parameters is effective only on an unconnected | |
5430 | * socket (for UDP-style sockets only future associations are effected | |
5431 | * by the change). With TCP-style sockets, this option is inherited by | |
5432 | * sockets derived from a listener socket. | |
5433 | */ | |
5434 | static int sctp_getsockopt_initmsg(struct sock *sk, int len, char __user *optval, int __user *optlen) | |
5435 | { | |
408f22e8 | 5436 | if (len < sizeof(struct sctp_initmsg)) |
1da177e4 | 5437 | return -EINVAL; |
408f22e8 NH |
5438 | len = sizeof(struct sctp_initmsg); |
5439 | if (put_user(len, optlen)) | |
5440 | return -EFAULT; | |
1da177e4 LT |
5441 | if (copy_to_user(optval, &sctp_sk(sk)->initmsg, len)) |
5442 | return -EFAULT; | |
5443 | return 0; | |
5444 | } | |
5445 | ||