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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> | |
60 | #include <linux/ip.h> | |
4fc268d2 | 61 | #include <linux/capability.h> |
1da177e4 LT |
62 | #include <linux/fcntl.h> |
63 | #include <linux/poll.h> | |
64 | #include <linux/init.h> | |
5a0e3ad6 | 65 | #include <linux/slab.h> |
56b31d1c | 66 | #include <linux/file.h> |
ffd59393 | 67 | #include <linux/compat.h> |
1da177e4 LT |
68 | |
69 | #include <net/ip.h> | |
70 | #include <net/icmp.h> | |
71 | #include <net/route.h> | |
72 | #include <net/ipv6.h> | |
73 | #include <net/inet_common.h> | |
8465a5fc | 74 | #include <net/busy_poll.h> |
1da177e4 LT |
75 | |
76 | #include <linux/socket.h> /* for sa_family_t */ | |
bc3b2d7f | 77 | #include <linux/export.h> |
1da177e4 LT |
78 | #include <net/sock.h> |
79 | #include <net/sctp/sctp.h> | |
80 | #include <net/sctp/sm.h> | |
81 | ||
1da177e4 LT |
82 | /* Forward declarations for internal helper functions. */ |
83 | static int sctp_writeable(struct sock *sk); | |
84 | static void sctp_wfree(struct sk_buff *skb); | |
85 | static int sctp_wait_for_sndbuf(struct sctp_association *, long *timeo_p, | |
86 | size_t msg_len); | |
26ac8e5f | 87 | static int sctp_wait_for_packet(struct sock *sk, int *err, long *timeo_p); |
1da177e4 LT |
88 | static int sctp_wait_for_connect(struct sctp_association *, long *timeo_p); |
89 | static int sctp_wait_for_accept(struct sock *sk, long timeo); | |
90 | static void sctp_wait_for_close(struct sock *sk, long timeo); | |
0a2fbac1 | 91 | static void sctp_destruct_sock(struct sock *sk); |
1da177e4 LT |
92 | static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt, |
93 | union sctp_addr *addr, int len); | |
94 | static int sctp_bindx_add(struct sock *, struct sockaddr *, int); | |
95 | static int sctp_bindx_rem(struct sock *, struct sockaddr *, int); | |
96 | static int sctp_send_asconf_add_ip(struct sock *, struct sockaddr *, int); | |
97 | static int sctp_send_asconf_del_ip(struct sock *, struct sockaddr *, int); | |
98 | static int sctp_send_asconf(struct sctp_association *asoc, | |
99 | struct sctp_chunk *chunk); | |
100 | static int sctp_do_bind(struct sock *, union sctp_addr *, int); | |
101 | static int sctp_autobind(struct sock *sk); | |
102 | static void sctp_sock_migrate(struct sock *, struct sock *, | |
103 | struct sctp_association *, sctp_socket_type_t); | |
1da177e4 | 104 | |
b6fa1a4d | 105 | static int sctp_memory_pressure; |
8d987e5c | 106 | static atomic_long_t sctp_memory_allocated; |
1748376b | 107 | struct percpu_counter sctp_sockets_allocated; |
4d93df0a | 108 | |
5c52ba17 | 109 | static void sctp_enter_memory_pressure(struct sock *sk) |
4d93df0a NH |
110 | { |
111 | sctp_memory_pressure = 1; | |
112 | } | |
113 | ||
114 | ||
1da177e4 LT |
115 | /* Get the sndbuf space available at the time on the association. */ |
116 | static inline int sctp_wspace(struct sctp_association *asoc) | |
117 | { | |
4d93df0a | 118 | int amt; |
1da177e4 | 119 | |
4d93df0a NH |
120 | if (asoc->ep->sndbuf_policy) |
121 | amt = asoc->sndbuf_used; | |
122 | else | |
31e6d363 | 123 | amt = sk_wmem_alloc_get(asoc->base.sk); |
4d93df0a NH |
124 | |
125 | if (amt >= asoc->base.sk->sk_sndbuf) { | |
126 | if (asoc->base.sk->sk_userlocks & SOCK_SNDBUF_LOCK) | |
127 | amt = 0; | |
128 | else { | |
129 | amt = sk_stream_wspace(asoc->base.sk); | |
130 | if (amt < 0) | |
131 | amt = 0; | |
132 | } | |
4eb701df | 133 | } else { |
4d93df0a | 134 | amt = asoc->base.sk->sk_sndbuf - amt; |
4eb701df | 135 | } |
1da177e4 LT |
136 | return amt; |
137 | } | |
138 | ||
139 | /* Increment the used sndbuf space count of the corresponding association by | |
140 | * the size of the outgoing data chunk. | |
141 | * Also, set the skb destructor for sndbuf accounting later. | |
142 | * | |
143 | * Since it is always 1-1 between chunk and skb, and also a new skb is always | |
144 | * allocated for chunk bundling in sctp_packet_transmit(), we can use the | |
145 | * destructor in the data chunk skb for the purpose of the sndbuf space | |
146 | * tracking. | |
147 | */ | |
148 | static inline void sctp_set_owner_w(struct sctp_chunk *chunk) | |
149 | { | |
150 | struct sctp_association *asoc = chunk->asoc; | |
151 | struct sock *sk = asoc->base.sk; | |
152 | ||
153 | /* The sndbuf space is tracked per association. */ | |
154 | sctp_association_hold(asoc); | |
155 | ||
4eb701df NH |
156 | skb_set_owner_w(chunk->skb, sk); |
157 | ||
1da177e4 LT |
158 | chunk->skb->destructor = sctp_wfree; |
159 | /* Save the chunk pointer in skb for sctp_wfree to use later. */ | |
f869c912 | 160 | skb_shinfo(chunk->skb)->destructor_arg = chunk; |
1da177e4 | 161 | |
4eb701df NH |
162 | asoc->sndbuf_used += SCTP_DATA_SNDSIZE(chunk) + |
163 | sizeof(struct sk_buff) + | |
164 | sizeof(struct sctp_chunk); | |
165 | ||
4eb701df | 166 | atomic_add(sizeof(struct sctp_chunk), &sk->sk_wmem_alloc); |
3ab224be HA |
167 | sk->sk_wmem_queued += chunk->skb->truesize; |
168 | sk_mem_charge(sk, chunk->skb->truesize); | |
1da177e4 LT |
169 | } |
170 | ||
171 | /* Verify that this is a valid address. */ | |
172 | static inline int sctp_verify_addr(struct sock *sk, union sctp_addr *addr, | |
173 | int len) | |
174 | { | |
175 | struct sctp_af *af; | |
176 | ||
177 | /* Verify basic sockaddr. */ | |
178 | af = sctp_sockaddr_af(sctp_sk(sk), addr, len); | |
179 | if (!af) | |
180 | return -EINVAL; | |
181 | ||
182 | /* Is this a valid SCTP address? */ | |
5636bef7 | 183 | if (!af->addr_valid(addr, sctp_sk(sk), NULL)) |
1da177e4 LT |
184 | return -EINVAL; |
185 | ||
186 | if (!sctp_sk(sk)->pf->send_verify(sctp_sk(sk), (addr))) | |
187 | return -EINVAL; | |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
192 | /* Look up the association by its id. If this is not a UDP-style | |
193 | * socket, the ID field is always ignored. | |
194 | */ | |
195 | struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id) | |
196 | { | |
197 | struct sctp_association *asoc = NULL; | |
198 | ||
199 | /* If this is not a UDP-style socket, assoc id should be ignored. */ | |
200 | if (!sctp_style(sk, UDP)) { | |
201 | /* Return NULL if the socket state is not ESTABLISHED. It | |
202 | * could be a TCP-style listening socket or a socket which | |
203 | * hasn't yet called connect() to establish an association. | |
204 | */ | |
e5b13f34 | 205 | if (!sctp_sstate(sk, ESTABLISHED) && !sctp_sstate(sk, CLOSING)) |
1da177e4 LT |
206 | return NULL; |
207 | ||
208 | /* Get the first and the only association from the list. */ | |
209 | if (!list_empty(&sctp_sk(sk)->ep->asocs)) | |
210 | asoc = list_entry(sctp_sk(sk)->ep->asocs.next, | |
211 | struct sctp_association, asocs); | |
212 | return asoc; | |
213 | } | |
214 | ||
215 | /* Otherwise this is a UDP-style socket. */ | |
216 | if (!id || (id == (sctp_assoc_t)-1)) | |
217 | return NULL; | |
218 | ||
219 | spin_lock_bh(&sctp_assocs_id_lock); | |
220 | asoc = (struct sctp_association *)idr_find(&sctp_assocs_id, (int)id); | |
221 | spin_unlock_bh(&sctp_assocs_id_lock); | |
222 | ||
223 | if (!asoc || (asoc->base.sk != sk) || asoc->base.dead) | |
224 | return NULL; | |
225 | ||
226 | return asoc; | |
227 | } | |
228 | ||
229 | /* Look up the transport from an address and an assoc id. If both address and | |
230 | * id are specified, the associations matching the address and the id should be | |
231 | * the same. | |
232 | */ | |
233 | static struct sctp_transport *sctp_addr_id2transport(struct sock *sk, | |
234 | struct sockaddr_storage *addr, | |
235 | sctp_assoc_t id) | |
236 | { | |
237 | struct sctp_association *addr_asoc = NULL, *id_asoc = NULL; | |
238 | struct sctp_transport *transport; | |
239 | union sctp_addr *laddr = (union sctp_addr *)addr; | |
240 | ||
1da177e4 | 241 | addr_asoc = sctp_endpoint_lookup_assoc(sctp_sk(sk)->ep, |
cd4ff034 | 242 | laddr, |
1da177e4 | 243 | &transport); |
1da177e4 LT |
244 | |
245 | if (!addr_asoc) | |
246 | return NULL; | |
247 | ||
248 | id_asoc = sctp_id2assoc(sk, id); | |
249 | if (id_asoc && (id_asoc != addr_asoc)) | |
250 | return NULL; | |
251 | ||
299ee123 | 252 | sctp_get_pf_specific(sk->sk_family)->addr_to_user(sctp_sk(sk), |
1da177e4 LT |
253 | (union sctp_addr *)addr); |
254 | ||
255 | return transport; | |
256 | } | |
257 | ||
258 | /* API 3.1.2 bind() - UDP Style Syntax | |
259 | * The syntax of bind() is, | |
260 | * | |
261 | * ret = bind(int sd, struct sockaddr *addr, int addrlen); | |
262 | * | |
263 | * sd - the socket descriptor returned by socket(). | |
264 | * addr - the address structure (struct sockaddr_in or struct | |
265 | * sockaddr_in6 [RFC 2553]), | |
266 | * addr_len - the size of the address structure. | |
267 | */ | |
dda91928 | 268 | static int sctp_bind(struct sock *sk, struct sockaddr *addr, int addr_len) |
1da177e4 LT |
269 | { |
270 | int retval = 0; | |
271 | ||
048ed4b6 | 272 | lock_sock(sk); |
1da177e4 | 273 | |
bb33381d DB |
274 | pr_debug("%s: sk:%p, addr:%p, addr_len:%d\n", __func__, sk, |
275 | addr, addr_len); | |
1da177e4 LT |
276 | |
277 | /* Disallow binding twice. */ | |
278 | if (!sctp_sk(sk)->ep->base.bind_addr.port) | |
3f7a87d2 | 279 | retval = sctp_do_bind(sk, (union sctp_addr *)addr, |
1da177e4 LT |
280 | addr_len); |
281 | else | |
282 | retval = -EINVAL; | |
283 | ||
048ed4b6 | 284 | release_sock(sk); |
1da177e4 LT |
285 | |
286 | return retval; | |
287 | } | |
288 | ||
289 | static long sctp_get_port_local(struct sock *, union sctp_addr *); | |
290 | ||
291 | /* Verify this is a valid sockaddr. */ | |
292 | static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt, | |
293 | union sctp_addr *addr, int len) | |
294 | { | |
295 | struct sctp_af *af; | |
296 | ||
297 | /* Check minimum size. */ | |
298 | if (len < sizeof (struct sockaddr)) | |
299 | return NULL; | |
300 | ||
7dab83de VY |
301 | /* V4 mapped address are really of AF_INET family */ |
302 | if (addr->sa.sa_family == AF_INET6 && | |
303 | ipv6_addr_v4mapped(&addr->v6.sin6_addr)) { | |
304 | if (!opt->pf->af_supported(AF_INET, opt)) | |
305 | return NULL; | |
306 | } else { | |
307 | /* Does this PF support this AF? */ | |
308 | if (!opt->pf->af_supported(addr->sa.sa_family, opt)) | |
309 | return NULL; | |
310 | } | |
1da177e4 LT |
311 | |
312 | /* If we get this far, af is valid. */ | |
313 | af = sctp_get_af_specific(addr->sa.sa_family); | |
314 | ||
315 | if (len < af->sockaddr_len) | |
316 | return NULL; | |
317 | ||
318 | return af; | |
319 | } | |
320 | ||
321 | /* Bind a local address either to an endpoint or to an association. */ | |
dda91928 | 322 | static int sctp_do_bind(struct sock *sk, union sctp_addr *addr, int len) |
1da177e4 | 323 | { |
3594698a | 324 | struct net *net = sock_net(sk); |
1da177e4 LT |
325 | struct sctp_sock *sp = sctp_sk(sk); |
326 | struct sctp_endpoint *ep = sp->ep; | |
327 | struct sctp_bind_addr *bp = &ep->base.bind_addr; | |
328 | struct sctp_af *af; | |
329 | unsigned short snum; | |
330 | int ret = 0; | |
331 | ||
1da177e4 LT |
332 | /* Common sockaddr verification. */ |
333 | af = sctp_sockaddr_af(sp, addr, len); | |
3f7a87d2 | 334 | if (!af) { |
bb33381d DB |
335 | pr_debug("%s: sk:%p, newaddr:%p, len:%d EINVAL\n", |
336 | __func__, sk, addr, len); | |
1da177e4 | 337 | return -EINVAL; |
3f7a87d2 FF |
338 | } |
339 | ||
340 | snum = ntohs(addr->v4.sin_port); | |
341 | ||
bb33381d DB |
342 | pr_debug("%s: sk:%p, new addr:%pISc, port:%d, new port:%d, len:%d\n", |
343 | __func__, sk, &addr->sa, bp->port, snum, len); | |
1da177e4 LT |
344 | |
345 | /* PF specific bind() address verification. */ | |
346 | if (!sp->pf->bind_verify(sp, addr)) | |
347 | return -EADDRNOTAVAIL; | |
348 | ||
8b358056 VY |
349 | /* We must either be unbound, or bind to the same port. |
350 | * It's OK to allow 0 ports if we are already bound. | |
351 | * We'll just inhert an already bound port in this case | |
352 | */ | |
353 | if (bp->port) { | |
354 | if (!snum) | |
355 | snum = bp->port; | |
356 | else if (snum != bp->port) { | |
bb33381d DB |
357 | pr_debug("%s: new port %d doesn't match existing port " |
358 | "%d\n", __func__, snum, bp->port); | |
8b358056 VY |
359 | return -EINVAL; |
360 | } | |
1da177e4 LT |
361 | } |
362 | ||
3594698a EB |
363 | if (snum && snum < PROT_SOCK && |
364 | !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE)) | |
1da177e4 LT |
365 | return -EACCES; |
366 | ||
4e54064e VY |
367 | /* See if the address matches any of the addresses we may have |
368 | * already bound before checking against other endpoints. | |
369 | */ | |
370 | if (sctp_bind_addr_match(bp, addr, sp)) | |
371 | return -EINVAL; | |
372 | ||
1da177e4 LT |
373 | /* Make sure we are allowed to bind here. |
374 | * The function sctp_get_port_local() does duplicate address | |
375 | * detection. | |
376 | */ | |
2772b495 | 377 | addr->v4.sin_port = htons(snum); |
1da177e4 | 378 | if ((ret = sctp_get_port_local(sk, addr))) { |
4e54064e | 379 | return -EADDRINUSE; |
1da177e4 LT |
380 | } |
381 | ||
382 | /* Refresh ephemeral port. */ | |
383 | if (!bp->port) | |
c720c7e8 | 384 | bp->port = inet_sk(sk)->inet_num; |
1da177e4 | 385 | |
559cf710 VY |
386 | /* Add the address to the bind address list. |
387 | * Use GFP_ATOMIC since BHs will be disabled. | |
388 | */ | |
133800d1 MRL |
389 | ret = sctp_add_bind_addr(bp, addr, af->sockaddr_len, |
390 | SCTP_ADDR_SRC, GFP_ATOMIC); | |
1da177e4 LT |
391 | |
392 | /* Copy back into socket for getsockname() use. */ | |
393 | if (!ret) { | |
c720c7e8 | 394 | inet_sk(sk)->inet_sport = htons(inet_sk(sk)->inet_num); |
299ee123 | 395 | sp->pf->to_sk_saddr(addr, sk); |
1da177e4 LT |
396 | } |
397 | ||
398 | return ret; | |
399 | } | |
400 | ||
401 | /* ADDIP Section 4.1.1 Congestion Control of ASCONF Chunks | |
402 | * | |
d808ad9a | 403 | * R1) One and only one ASCONF Chunk MAY be in transit and unacknowledged |
1da177e4 | 404 | * at any one time. If a sender, after sending an ASCONF chunk, decides |
d808ad9a | 405 | * it needs to transfer another ASCONF Chunk, it MUST wait until the |
1da177e4 | 406 | * ASCONF-ACK Chunk returns from the previous ASCONF Chunk before sending a |
d808ad9a YH |
407 | * subsequent ASCONF. Note this restriction binds each side, so at any |
408 | * time two ASCONF may be in-transit on any given association (one sent | |
1da177e4 LT |
409 | * from each endpoint). |
410 | */ | |
411 | static int sctp_send_asconf(struct sctp_association *asoc, | |
412 | struct sctp_chunk *chunk) | |
413 | { | |
55e26eb9 | 414 | struct net *net = sock_net(asoc->base.sk); |
1da177e4 LT |
415 | int retval = 0; |
416 | ||
417 | /* If there is an outstanding ASCONF chunk, queue it for later | |
418 | * transmission. | |
d808ad9a | 419 | */ |
1da177e4 | 420 | if (asoc->addip_last_asconf) { |
79af02c2 | 421 | list_add_tail(&chunk->list, &asoc->addip_chunk_list); |
d808ad9a | 422 | goto out; |
1da177e4 LT |
423 | } |
424 | ||
425 | /* Hold the chunk until an ASCONF_ACK is received. */ | |
426 | sctp_chunk_hold(chunk); | |
55e26eb9 | 427 | retval = sctp_primitive_ASCONF(net, asoc, chunk); |
1da177e4 LT |
428 | if (retval) |
429 | sctp_chunk_free(chunk); | |
430 | else | |
431 | asoc->addip_last_asconf = chunk; | |
432 | ||
433 | out: | |
434 | return retval; | |
435 | } | |
436 | ||
437 | /* Add a list of addresses as bind addresses to local endpoint or | |
438 | * association. | |
439 | * | |
440 | * Basically run through each address specified in the addrs/addrcnt | |
441 | * array/length pair, determine if it is IPv6 or IPv4 and call | |
442 | * sctp_do_bind() on it. | |
443 | * | |
444 | * If any of them fails, then the operation will be reversed and the | |
445 | * ones that were added will be removed. | |
446 | * | |
447 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
448 | */ | |
04675210 | 449 | static int sctp_bindx_add(struct sock *sk, struct sockaddr *addrs, int addrcnt) |
1da177e4 LT |
450 | { |
451 | int cnt; | |
452 | int retval = 0; | |
453 | void *addr_buf; | |
454 | struct sockaddr *sa_addr; | |
455 | struct sctp_af *af; | |
456 | ||
bb33381d DB |
457 | pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", __func__, sk, |
458 | addrs, addrcnt); | |
1da177e4 LT |
459 | |
460 | addr_buf = addrs; | |
461 | for (cnt = 0; cnt < addrcnt; cnt++) { | |
462 | /* The list may contain either IPv4 or IPv6 address; | |
463 | * determine the address length for walking thru the list. | |
464 | */ | |
ea110733 | 465 | sa_addr = addr_buf; |
1da177e4 LT |
466 | af = sctp_get_af_specific(sa_addr->sa_family); |
467 | if (!af) { | |
468 | retval = -EINVAL; | |
469 | goto err_bindx_add; | |
470 | } | |
471 | ||
d808ad9a | 472 | retval = sctp_do_bind(sk, (union sctp_addr *)sa_addr, |
1da177e4 LT |
473 | af->sockaddr_len); |
474 | ||
475 | addr_buf += af->sockaddr_len; | |
476 | ||
477 | err_bindx_add: | |
478 | if (retval < 0) { | |
479 | /* Failed. Cleanup the ones that have been added */ | |
480 | if (cnt > 0) | |
481 | sctp_bindx_rem(sk, addrs, cnt); | |
482 | return retval; | |
483 | } | |
484 | } | |
485 | ||
486 | return retval; | |
487 | } | |
488 | ||
489 | /* Send an ASCONF chunk with Add IP address parameters to all the peers of the | |
490 | * associations that are part of the endpoint indicating that a list of local | |
491 | * addresses are added to the endpoint. | |
492 | * | |
d808ad9a | 493 | * If any of the addresses is already in the bind address list of the |
1da177e4 LT |
494 | * association, we do not send the chunk for that association. But it will not |
495 | * affect other associations. | |
496 | * | |
497 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
498 | */ | |
d808ad9a | 499 | static int sctp_send_asconf_add_ip(struct sock *sk, |
1da177e4 LT |
500 | struct sockaddr *addrs, |
501 | int addrcnt) | |
502 | { | |
e1fc3b14 | 503 | struct net *net = sock_net(sk); |
1da177e4 LT |
504 | struct sctp_sock *sp; |
505 | struct sctp_endpoint *ep; | |
506 | struct sctp_association *asoc; | |
507 | struct sctp_bind_addr *bp; | |
508 | struct sctp_chunk *chunk; | |
509 | struct sctp_sockaddr_entry *laddr; | |
510 | union sctp_addr *addr; | |
dc022a98 | 511 | union sctp_addr saveaddr; |
1da177e4 LT |
512 | void *addr_buf; |
513 | struct sctp_af *af; | |
1da177e4 LT |
514 | struct list_head *p; |
515 | int i; | |
516 | int retval = 0; | |
517 | ||
e1fc3b14 | 518 | if (!net->sctp.addip_enable) |
1da177e4 LT |
519 | return retval; |
520 | ||
521 | sp = sctp_sk(sk); | |
522 | ep = sp->ep; | |
523 | ||
bb33381d DB |
524 | pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", |
525 | __func__, sk, addrs, addrcnt); | |
1da177e4 | 526 | |
9dbc15f0 | 527 | list_for_each_entry(asoc, &ep->asocs, asocs) { |
1da177e4 LT |
528 | if (!asoc->peer.asconf_capable) |
529 | continue; | |
530 | ||
531 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_ADD_IP) | |
532 | continue; | |
533 | ||
534 | if (!sctp_state(asoc, ESTABLISHED)) | |
535 | continue; | |
536 | ||
537 | /* Check if any address in the packed array of addresses is | |
d808ad9a YH |
538 | * in the bind address list of the association. If so, |
539 | * do not send the asconf chunk to its peer, but continue with | |
1da177e4 LT |
540 | * other associations. |
541 | */ | |
542 | addr_buf = addrs; | |
543 | for (i = 0; i < addrcnt; i++) { | |
ea110733 | 544 | addr = addr_buf; |
1da177e4 LT |
545 | af = sctp_get_af_specific(addr->v4.sin_family); |
546 | if (!af) { | |
547 | retval = -EINVAL; | |
548 | goto out; | |
549 | } | |
550 | ||
551 | if (sctp_assoc_lookup_laddr(asoc, addr)) | |
552 | break; | |
553 | ||
554 | addr_buf += af->sockaddr_len; | |
555 | } | |
556 | if (i < addrcnt) | |
557 | continue; | |
558 | ||
559cf710 VY |
559 | /* Use the first valid address in bind addr list of |
560 | * association as Address Parameter of ASCONF CHUNK. | |
1da177e4 | 561 | */ |
1da177e4 LT |
562 | bp = &asoc->base.bind_addr; |
563 | p = bp->address_list.next; | |
564 | laddr = list_entry(p, struct sctp_sockaddr_entry, list); | |
5ae955cf | 565 | chunk = sctp_make_asconf_update_ip(asoc, &laddr->a, addrs, |
1da177e4 LT |
566 | addrcnt, SCTP_PARAM_ADD_IP); |
567 | if (!chunk) { | |
568 | retval = -ENOMEM; | |
569 | goto out; | |
570 | } | |
571 | ||
dc022a98 SS |
572 | /* Add the new addresses to the bind address list with |
573 | * use_as_src set to 0. | |
1da177e4 | 574 | */ |
dc022a98 SS |
575 | addr_buf = addrs; |
576 | for (i = 0; i < addrcnt; i++) { | |
ea110733 | 577 | addr = addr_buf; |
dc022a98 SS |
578 | af = sctp_get_af_specific(addr->v4.sin_family); |
579 | memcpy(&saveaddr, addr, af->sockaddr_len); | |
f57d96b2 | 580 | retval = sctp_add_bind_addr(bp, &saveaddr, |
133800d1 | 581 | sizeof(saveaddr), |
f57d96b2 | 582 | SCTP_ADDR_NEW, GFP_ATOMIC); |
dc022a98 SS |
583 | addr_buf += af->sockaddr_len; |
584 | } | |
8a07eb0a MH |
585 | if (asoc->src_out_of_asoc_ok) { |
586 | struct sctp_transport *trans; | |
587 | ||
588 | list_for_each_entry(trans, | |
589 | &asoc->peer.transport_addr_list, transports) { | |
590 | /* Clear the source and route cache */ | |
591 | dst_release(trans->dst); | |
592 | trans->cwnd = min(4*asoc->pathmtu, max_t(__u32, | |
593 | 2*asoc->pathmtu, 4380)); | |
594 | trans->ssthresh = asoc->peer.i.a_rwnd; | |
595 | trans->rto = asoc->rto_initial; | |
196d6759 | 596 | sctp_max_rto(asoc, trans); |
8a07eb0a MH |
597 | trans->rtt = trans->srtt = trans->rttvar = 0; |
598 | sctp_transport_route(trans, NULL, | |
599 | sctp_sk(asoc->base.sk)); | |
600 | } | |
601 | } | |
602 | retval = sctp_send_asconf(asoc, chunk); | |
1da177e4 LT |
603 | } |
604 | ||
605 | out: | |
606 | return retval; | |
607 | } | |
608 | ||
609 | /* Remove a list of addresses from bind addresses list. Do not remove the | |
610 | * last address. | |
611 | * | |
612 | * Basically run through each address specified in the addrs/addrcnt | |
613 | * array/length pair, determine if it is IPv6 or IPv4 and call | |
614 | * sctp_del_bind() on it. | |
615 | * | |
616 | * If any of them fails, then the operation will be reversed and the | |
617 | * ones that were removed will be added back. | |
618 | * | |
619 | * At least one address has to be left; if only one address is | |
620 | * available, the operation will return -EBUSY. | |
621 | * | |
622 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
623 | */ | |
04675210 | 624 | static int sctp_bindx_rem(struct sock *sk, struct sockaddr *addrs, int addrcnt) |
1da177e4 LT |
625 | { |
626 | struct sctp_sock *sp = sctp_sk(sk); | |
627 | struct sctp_endpoint *ep = sp->ep; | |
628 | int cnt; | |
629 | struct sctp_bind_addr *bp = &ep->base.bind_addr; | |
630 | int retval = 0; | |
1da177e4 | 631 | void *addr_buf; |
c9a08505 | 632 | union sctp_addr *sa_addr; |
1da177e4 LT |
633 | struct sctp_af *af; |
634 | ||
bb33381d DB |
635 | pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", |
636 | __func__, sk, addrs, addrcnt); | |
1da177e4 LT |
637 | |
638 | addr_buf = addrs; | |
639 | for (cnt = 0; cnt < addrcnt; cnt++) { | |
640 | /* If the bind address list is empty or if there is only one | |
641 | * bind address, there is nothing more to be removed (we need | |
642 | * at least one address here). | |
643 | */ | |
644 | if (list_empty(&bp->address_list) || | |
645 | (sctp_list_single_entry(&bp->address_list))) { | |
646 | retval = -EBUSY; | |
647 | goto err_bindx_rem; | |
648 | } | |
649 | ||
ea110733 | 650 | sa_addr = addr_buf; |
c9a08505 | 651 | af = sctp_get_af_specific(sa_addr->sa.sa_family); |
1da177e4 LT |
652 | if (!af) { |
653 | retval = -EINVAL; | |
654 | goto err_bindx_rem; | |
655 | } | |
0304ff8a PG |
656 | |
657 | if (!af->addr_valid(sa_addr, sp, NULL)) { | |
658 | retval = -EADDRNOTAVAIL; | |
659 | goto err_bindx_rem; | |
660 | } | |
661 | ||
ee9cbaca VY |
662 | if (sa_addr->v4.sin_port && |
663 | sa_addr->v4.sin_port != htons(bp->port)) { | |
1da177e4 LT |
664 | retval = -EINVAL; |
665 | goto err_bindx_rem; | |
666 | } | |
667 | ||
ee9cbaca VY |
668 | if (!sa_addr->v4.sin_port) |
669 | sa_addr->v4.sin_port = htons(bp->port); | |
670 | ||
1da177e4 LT |
671 | /* FIXME - There is probably a need to check if sk->sk_saddr and |
672 | * sk->sk_rcv_addr are currently set to one of the addresses to | |
673 | * be removed. This is something which needs to be looked into | |
674 | * when we are fixing the outstanding issues with multi-homing | |
675 | * socket routing and failover schemes. Refer to comments in | |
676 | * sctp_do_bind(). -daisy | |
677 | */ | |
0ed90fb0 | 678 | retval = sctp_del_bind_addr(bp, sa_addr); |
1da177e4 LT |
679 | |
680 | addr_buf += af->sockaddr_len; | |
681 | err_bindx_rem: | |
682 | if (retval < 0) { | |
683 | /* Failed. Add the ones that has been removed back */ | |
684 | if (cnt > 0) | |
685 | sctp_bindx_add(sk, addrs, cnt); | |
686 | return retval; | |
687 | } | |
688 | } | |
689 | ||
690 | return retval; | |
691 | } | |
692 | ||
693 | /* Send an ASCONF chunk with Delete IP address parameters to all the peers of | |
694 | * the associations that are part of the endpoint indicating that a list of | |
695 | * local addresses are removed from the endpoint. | |
696 | * | |
d808ad9a | 697 | * If any of the addresses is already in the bind address list of the |
1da177e4 LT |
698 | * association, we do not send the chunk for that association. But it will not |
699 | * affect other associations. | |
700 | * | |
701 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
702 | */ | |
703 | static int sctp_send_asconf_del_ip(struct sock *sk, | |
704 | struct sockaddr *addrs, | |
705 | int addrcnt) | |
706 | { | |
e1fc3b14 | 707 | struct net *net = sock_net(sk); |
1da177e4 LT |
708 | struct sctp_sock *sp; |
709 | struct sctp_endpoint *ep; | |
710 | struct sctp_association *asoc; | |
dc022a98 | 711 | struct sctp_transport *transport; |
1da177e4 LT |
712 | struct sctp_bind_addr *bp; |
713 | struct sctp_chunk *chunk; | |
714 | union sctp_addr *laddr; | |
715 | void *addr_buf; | |
716 | struct sctp_af *af; | |
dc022a98 | 717 | struct sctp_sockaddr_entry *saddr; |
1da177e4 LT |
718 | int i; |
719 | int retval = 0; | |
8a07eb0a | 720 | int stored = 0; |
1da177e4 | 721 | |
8a07eb0a | 722 | chunk = NULL; |
e1fc3b14 | 723 | if (!net->sctp.addip_enable) |
1da177e4 LT |
724 | return retval; |
725 | ||
726 | sp = sctp_sk(sk); | |
727 | ep = sp->ep; | |
728 | ||
bb33381d DB |
729 | pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", |
730 | __func__, sk, addrs, addrcnt); | |
1da177e4 | 731 | |
9dbc15f0 | 732 | list_for_each_entry(asoc, &ep->asocs, asocs) { |
1da177e4 LT |
733 | |
734 | if (!asoc->peer.asconf_capable) | |
735 | continue; | |
736 | ||
737 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_DEL_IP) | |
738 | continue; | |
739 | ||
740 | if (!sctp_state(asoc, ESTABLISHED)) | |
741 | continue; | |
742 | ||
743 | /* Check if any address in the packed array of addresses is | |
d808ad9a | 744 | * not present in the bind address list of the association. |
1da177e4 LT |
745 | * If so, do not send the asconf chunk to its peer, but |
746 | * continue with other associations. | |
747 | */ | |
748 | addr_buf = addrs; | |
749 | for (i = 0; i < addrcnt; i++) { | |
ea110733 | 750 | laddr = addr_buf; |
1da177e4 LT |
751 | af = sctp_get_af_specific(laddr->v4.sin_family); |
752 | if (!af) { | |
753 | retval = -EINVAL; | |
754 | goto out; | |
755 | } | |
756 | ||
757 | if (!sctp_assoc_lookup_laddr(asoc, laddr)) | |
758 | break; | |
759 | ||
760 | addr_buf += af->sockaddr_len; | |
761 | } | |
762 | if (i < addrcnt) | |
763 | continue; | |
764 | ||
765 | /* Find one address in the association's bind address list | |
766 | * that is not in the packed array of addresses. This is to | |
767 | * make sure that we do not delete all the addresses in the | |
768 | * association. | |
769 | */ | |
1da177e4 LT |
770 | bp = &asoc->base.bind_addr; |
771 | laddr = sctp_find_unmatch_addr(bp, (union sctp_addr *)addrs, | |
772 | addrcnt, sp); | |
8a07eb0a MH |
773 | if ((laddr == NULL) && (addrcnt == 1)) { |
774 | if (asoc->asconf_addr_del_pending) | |
775 | continue; | |
776 | asoc->asconf_addr_del_pending = | |
777 | kzalloc(sizeof(union sctp_addr), GFP_ATOMIC); | |
6d65e5ee MH |
778 | if (asoc->asconf_addr_del_pending == NULL) { |
779 | retval = -ENOMEM; | |
780 | goto out; | |
781 | } | |
8a07eb0a MH |
782 | asoc->asconf_addr_del_pending->sa.sa_family = |
783 | addrs->sa_family; | |
784 | asoc->asconf_addr_del_pending->v4.sin_port = | |
785 | htons(bp->port); | |
786 | if (addrs->sa_family == AF_INET) { | |
787 | struct sockaddr_in *sin; | |
788 | ||
789 | sin = (struct sockaddr_in *)addrs; | |
790 | asoc->asconf_addr_del_pending->v4.sin_addr.s_addr = sin->sin_addr.s_addr; | |
791 | } else if (addrs->sa_family == AF_INET6) { | |
792 | struct sockaddr_in6 *sin6; | |
793 | ||
794 | sin6 = (struct sockaddr_in6 *)addrs; | |
4e3fd7a0 | 795 | asoc->asconf_addr_del_pending->v6.sin6_addr = sin6->sin6_addr; |
8a07eb0a | 796 | } |
bb33381d DB |
797 | |
798 | pr_debug("%s: keep the last address asoc:%p %pISc at %p\n", | |
799 | __func__, asoc, &asoc->asconf_addr_del_pending->sa, | |
800 | asoc->asconf_addr_del_pending); | |
801 | ||
8a07eb0a MH |
802 | asoc->src_out_of_asoc_ok = 1; |
803 | stored = 1; | |
804 | goto skip_mkasconf; | |
805 | } | |
1da177e4 | 806 | |
88362ad8 DB |
807 | if (laddr == NULL) |
808 | return -EINVAL; | |
809 | ||
559cf710 VY |
810 | /* We do not need RCU protection throughout this loop |
811 | * because this is done under a socket lock from the | |
812 | * setsockopt call. | |
813 | */ | |
1da177e4 LT |
814 | chunk = sctp_make_asconf_update_ip(asoc, laddr, addrs, addrcnt, |
815 | SCTP_PARAM_DEL_IP); | |
816 | if (!chunk) { | |
817 | retval = -ENOMEM; | |
818 | goto out; | |
819 | } | |
820 | ||
8a07eb0a | 821 | skip_mkasconf: |
dc022a98 SS |
822 | /* Reset use_as_src flag for the addresses in the bind address |
823 | * list that are to be deleted. | |
824 | */ | |
dc022a98 SS |
825 | addr_buf = addrs; |
826 | for (i = 0; i < addrcnt; i++) { | |
ea110733 | 827 | laddr = addr_buf; |
dc022a98 | 828 | af = sctp_get_af_specific(laddr->v4.sin_family); |
559cf710 | 829 | list_for_each_entry(saddr, &bp->address_list, list) { |
5f242a13 | 830 | if (sctp_cmp_addr_exact(&saddr->a, laddr)) |
f57d96b2 | 831 | saddr->state = SCTP_ADDR_DEL; |
dc022a98 SS |
832 | } |
833 | addr_buf += af->sockaddr_len; | |
834 | } | |
1da177e4 | 835 | |
dc022a98 SS |
836 | /* Update the route and saddr entries for all the transports |
837 | * as some of the addresses in the bind address list are | |
838 | * about to be deleted and cannot be used as source addresses. | |
1da177e4 | 839 | */ |
9dbc15f0 RD |
840 | list_for_each_entry(transport, &asoc->peer.transport_addr_list, |
841 | transports) { | |
dc022a98 SS |
842 | dst_release(transport->dst); |
843 | sctp_transport_route(transport, NULL, | |
844 | sctp_sk(asoc->base.sk)); | |
845 | } | |
846 | ||
8a07eb0a MH |
847 | if (stored) |
848 | /* We don't need to transmit ASCONF */ | |
849 | continue; | |
dc022a98 | 850 | retval = sctp_send_asconf(asoc, chunk); |
1da177e4 LT |
851 | } |
852 | out: | |
853 | return retval; | |
854 | } | |
855 | ||
9f7d653b MH |
856 | /* set addr events to assocs in the endpoint. ep and addr_wq must be locked */ |
857 | int sctp_asconf_mgmt(struct sctp_sock *sp, struct sctp_sockaddr_entry *addrw) | |
858 | { | |
859 | struct sock *sk = sctp_opt2sk(sp); | |
860 | union sctp_addr *addr; | |
861 | struct sctp_af *af; | |
862 | ||
863 | /* It is safe to write port space in caller. */ | |
864 | addr = &addrw->a; | |
865 | addr->v4.sin_port = htons(sp->ep->base.bind_addr.port); | |
866 | af = sctp_get_af_specific(addr->sa.sa_family); | |
867 | if (!af) | |
868 | return -EINVAL; | |
869 | if (sctp_verify_addr(sk, addr, af->sockaddr_len)) | |
870 | return -EINVAL; | |
871 | ||
872 | if (addrw->state == SCTP_ADDR_NEW) | |
873 | return sctp_send_asconf_add_ip(sk, (struct sockaddr *)addr, 1); | |
874 | else | |
875 | return sctp_send_asconf_del_ip(sk, (struct sockaddr *)addr, 1); | |
876 | } | |
877 | ||
1da177e4 LT |
878 | /* Helper for tunneling sctp_bindx() requests through sctp_setsockopt() |
879 | * | |
880 | * API 8.1 | |
881 | * int sctp_bindx(int sd, struct sockaddr *addrs, int addrcnt, | |
882 | * int flags); | |
883 | * | |
884 | * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses. | |
885 | * If the sd is an IPv6 socket, the addresses passed can either be IPv4 | |
886 | * or IPv6 addresses. | |
887 | * | |
888 | * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see | |
889 | * Section 3.1.2 for this usage. | |
890 | * | |
891 | * addrs is a pointer to an array of one or more socket addresses. Each | |
892 | * address is contained in its appropriate structure (i.e. struct | |
893 | * sockaddr_in or struct sockaddr_in6) the family of the address type | |
23c435f7 | 894 | * must be used to distinguish the address length (note that this |
1da177e4 LT |
895 | * representation is termed a "packed array" of addresses). The caller |
896 | * specifies the number of addresses in the array with addrcnt. | |
897 | * | |
898 | * On success, sctp_bindx() returns 0. On failure, sctp_bindx() returns | |
899 | * -1, and sets errno to the appropriate error code. | |
900 | * | |
901 | * For SCTP, the port given in each socket address must be the same, or | |
902 | * sctp_bindx() will fail, setting errno to EINVAL. | |
903 | * | |
904 | * The flags parameter is formed from the bitwise OR of zero or more of | |
905 | * the following currently defined flags: | |
906 | * | |
907 | * SCTP_BINDX_ADD_ADDR | |
908 | * | |
909 | * SCTP_BINDX_REM_ADDR | |
910 | * | |
911 | * SCTP_BINDX_ADD_ADDR directs SCTP to add the given addresses to the | |
912 | * association, and SCTP_BINDX_REM_ADDR directs SCTP to remove the given | |
913 | * addresses from the association. The two flags are mutually exclusive; | |
914 | * if both are given, sctp_bindx() will fail with EINVAL. A caller may | |
915 | * not remove all addresses from an association; sctp_bindx() will | |
916 | * reject such an attempt with EINVAL. | |
917 | * | |
918 | * An application can use sctp_bindx(SCTP_BINDX_ADD_ADDR) to associate | |
919 | * additional addresses with an endpoint after calling bind(). Or use | |
920 | * sctp_bindx(SCTP_BINDX_REM_ADDR) to remove some addresses a listening | |
921 | * socket is associated with so that no new association accepted will be | |
922 | * associated with those addresses. If the endpoint supports dynamic | |
923 | * address a SCTP_BINDX_REM_ADDR or SCTP_BINDX_ADD_ADDR may cause a | |
924 | * endpoint to send the appropriate message to the peer to change the | |
925 | * peers address lists. | |
926 | * | |
927 | * Adding and removing addresses from a connected association is | |
928 | * optional functionality. Implementations that do not support this | |
929 | * functionality should return EOPNOTSUPP. | |
930 | * | |
931 | * Basically do nothing but copying the addresses from user to kernel | |
932 | * land and invoking either sctp_bindx_add() or sctp_bindx_rem() on the sk. | |
3f7a87d2 FF |
933 | * This is used for tunneling the sctp_bindx() request through sctp_setsockopt() |
934 | * from userspace. | |
1da177e4 LT |
935 | * |
936 | * We don't use copy_from_user() for optimization: we first do the | |
937 | * sanity checks (buffer size -fast- and access check-healthy | |
938 | * pointer); if all of those succeed, then we can alloc the memory | |
939 | * (expensive operation) needed to copy the data to kernel. Then we do | |
940 | * the copying without checking the user space area | |
941 | * (__copy_from_user()). | |
942 | * | |
943 | * On exit there is no need to do sockfd_put(), sys_setsockopt() does | |
944 | * it. | |
945 | * | |
946 | * sk The sk of the socket | |
947 | * addrs The pointer to the addresses in user land | |
948 | * addrssize Size of the addrs buffer | |
949 | * op Operation to perform (add or remove, see the flags of | |
950 | * sctp_bindx) | |
951 | * | |
952 | * Returns 0 if ok, <0 errno code on error. | |
953 | */ | |
26ac8e5f | 954 | static int sctp_setsockopt_bindx(struct sock *sk, |
dda91928 DB |
955 | struct sockaddr __user *addrs, |
956 | int addrs_size, int op) | |
1da177e4 LT |
957 | { |
958 | struct sockaddr *kaddrs; | |
959 | int err; | |
960 | int addrcnt = 0; | |
961 | int walk_size = 0; | |
962 | struct sockaddr *sa_addr; | |
963 | void *addr_buf; | |
964 | struct sctp_af *af; | |
965 | ||
bb33381d DB |
966 | pr_debug("%s: sk:%p addrs:%p addrs_size:%d opt:%d\n", |
967 | __func__, sk, addrs, addrs_size, op); | |
1da177e4 LT |
968 | |
969 | if (unlikely(addrs_size <= 0)) | |
970 | return -EINVAL; | |
971 | ||
972 | /* Check the user passed a healthy pointer. */ | |
973 | if (unlikely(!access_ok(VERIFY_READ, addrs, addrs_size))) | |
974 | return -EFAULT; | |
975 | ||
976 | /* Alloc space for the address array in kernel memory. */ | |
cacc0621 | 977 | kaddrs = kmalloc(addrs_size, GFP_USER | __GFP_NOWARN); |
1da177e4 LT |
978 | if (unlikely(!kaddrs)) |
979 | return -ENOMEM; | |
980 | ||
981 | if (__copy_from_user(kaddrs, addrs, addrs_size)) { | |
982 | kfree(kaddrs); | |
983 | return -EFAULT; | |
984 | } | |
985 | ||
d808ad9a | 986 | /* Walk through the addrs buffer and count the number of addresses. */ |
1da177e4 LT |
987 | addr_buf = kaddrs; |
988 | while (walk_size < addrs_size) { | |
d7e0d19a DR |
989 | if (walk_size + sizeof(sa_family_t) > addrs_size) { |
990 | kfree(kaddrs); | |
991 | return -EINVAL; | |
992 | } | |
993 | ||
ea110733 | 994 | sa_addr = addr_buf; |
1da177e4 LT |
995 | af = sctp_get_af_specific(sa_addr->sa_family); |
996 | ||
997 | /* If the address family is not supported or if this address | |
998 | * causes the address buffer to overflow return EINVAL. | |
d808ad9a | 999 | */ |
1da177e4 LT |
1000 | if (!af || (walk_size + af->sockaddr_len) > addrs_size) { |
1001 | kfree(kaddrs); | |
1002 | return -EINVAL; | |
1003 | } | |
1004 | addrcnt++; | |
1005 | addr_buf += af->sockaddr_len; | |
1006 | walk_size += af->sockaddr_len; | |
1007 | } | |
1008 | ||
1009 | /* Do the work. */ | |
1010 | switch (op) { | |
1011 | case SCTP_BINDX_ADD_ADDR: | |
1012 | err = sctp_bindx_add(sk, kaddrs, addrcnt); | |
1013 | if (err) | |
1014 | goto out; | |
1015 | err = sctp_send_asconf_add_ip(sk, kaddrs, addrcnt); | |
1016 | break; | |
1017 | ||
1018 | case SCTP_BINDX_REM_ADDR: | |
1019 | err = sctp_bindx_rem(sk, kaddrs, addrcnt); | |
1020 | if (err) | |
1021 | goto out; | |
1022 | err = sctp_send_asconf_del_ip(sk, kaddrs, addrcnt); | |
1023 | break; | |
1024 | ||
1025 | default: | |
1026 | err = -EINVAL; | |
1027 | break; | |
3ff50b79 | 1028 | } |
1da177e4 LT |
1029 | |
1030 | out: | |
1031 | kfree(kaddrs); | |
1032 | ||
1033 | return err; | |
1034 | } | |
1035 | ||
3f7a87d2 FF |
1036 | /* __sctp_connect(struct sock* sk, struct sockaddr *kaddrs, int addrs_size) |
1037 | * | |
1038 | * Common routine for handling connect() and sctp_connectx(). | |
1039 | * Connect will come in with just a single address. | |
1040 | */ | |
26ac8e5f | 1041 | static int __sctp_connect(struct sock *sk, |
3f7a87d2 | 1042 | struct sockaddr *kaddrs, |
88a0a948 VY |
1043 | int addrs_size, |
1044 | sctp_assoc_t *assoc_id) | |
3f7a87d2 | 1045 | { |
55e26eb9 | 1046 | struct net *net = sock_net(sk); |
3f7a87d2 FF |
1047 | struct sctp_sock *sp; |
1048 | struct sctp_endpoint *ep; | |
1049 | struct sctp_association *asoc = NULL; | |
1050 | struct sctp_association *asoc2; | |
1051 | struct sctp_transport *transport; | |
1052 | union sctp_addr to; | |
3f7a87d2 FF |
1053 | sctp_scope_t scope; |
1054 | long timeo; | |
1055 | int err = 0; | |
1056 | int addrcnt = 0; | |
1057 | int walk_size = 0; | |
e4d1feab | 1058 | union sctp_addr *sa_addr = NULL; |
3f7a87d2 | 1059 | void *addr_buf; |
16d00fb7 | 1060 | unsigned short port; |
f50f95ca | 1061 | unsigned int f_flags = 0; |
3f7a87d2 FF |
1062 | |
1063 | sp = sctp_sk(sk); | |
1064 | ep = sp->ep; | |
1065 | ||
1066 | /* connect() cannot be done on a socket that is already in ESTABLISHED | |
1067 | * state - UDP-style peeled off socket or a TCP-style socket that | |
1068 | * is already connected. | |
1069 | * It cannot be done even on a TCP-style listening socket. | |
1070 | */ | |
e5b13f34 | 1071 | if (sctp_sstate(sk, ESTABLISHED) || sctp_sstate(sk, CLOSING) || |
3f7a87d2 FF |
1072 | (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))) { |
1073 | err = -EISCONN; | |
1074 | goto out_free; | |
1075 | } | |
1076 | ||
1077 | /* Walk through the addrs buffer and count the number of addresses. */ | |
1078 | addr_buf = kaddrs; | |
1079 | while (walk_size < addrs_size) { | |
299ee123 JG |
1080 | struct sctp_af *af; |
1081 | ||
d7e0d19a DR |
1082 | if (walk_size + sizeof(sa_family_t) > addrs_size) { |
1083 | err = -EINVAL; | |
1084 | goto out_free; | |
1085 | } | |
1086 | ||
ea110733 | 1087 | sa_addr = addr_buf; |
4bdf4b5f | 1088 | af = sctp_get_af_specific(sa_addr->sa.sa_family); |
3f7a87d2 FF |
1089 | |
1090 | /* If the address family is not supported or if this address | |
1091 | * causes the address buffer to overflow return EINVAL. | |
1092 | */ | |
1093 | if (!af || (walk_size + af->sockaddr_len) > addrs_size) { | |
1094 | err = -EINVAL; | |
1095 | goto out_free; | |
1096 | } | |
1097 | ||
d7e0d19a DR |
1098 | port = ntohs(sa_addr->v4.sin_port); |
1099 | ||
e4d1feab VY |
1100 | /* Save current address so we can work with it */ |
1101 | memcpy(&to, sa_addr, af->sockaddr_len); | |
1102 | ||
1103 | err = sctp_verify_addr(sk, &to, af->sockaddr_len); | |
3f7a87d2 FF |
1104 | if (err) |
1105 | goto out_free; | |
1106 | ||
16d00fb7 VY |
1107 | /* Make sure the destination port is correctly set |
1108 | * in all addresses. | |
1109 | */ | |
524fba6c WY |
1110 | if (asoc && asoc->peer.port && asoc->peer.port != port) { |
1111 | err = -EINVAL; | |
16d00fb7 | 1112 | goto out_free; |
524fba6c | 1113 | } |
3f7a87d2 FF |
1114 | |
1115 | /* Check if there already is a matching association on the | |
1116 | * endpoint (other than the one created here). | |
1117 | */ | |
e4d1feab | 1118 | asoc2 = sctp_endpoint_lookup_assoc(ep, &to, &transport); |
3f7a87d2 FF |
1119 | if (asoc2 && asoc2 != asoc) { |
1120 | if (asoc2->state >= SCTP_STATE_ESTABLISHED) | |
1121 | err = -EISCONN; | |
1122 | else | |
1123 | err = -EALREADY; | |
1124 | goto out_free; | |
1125 | } | |
1126 | ||
1127 | /* If we could not find a matching association on the endpoint, | |
1128 | * make sure that there is no peeled-off association matching | |
1129 | * the peer address even on another socket. | |
1130 | */ | |
e4d1feab | 1131 | if (sctp_endpoint_is_peeled_off(ep, &to)) { |
3f7a87d2 FF |
1132 | err = -EADDRNOTAVAIL; |
1133 | goto out_free; | |
1134 | } | |
1135 | ||
1136 | if (!asoc) { | |
1137 | /* If a bind() or sctp_bindx() is not called prior to | |
1138 | * an sctp_connectx() call, the system picks an | |
1139 | * ephemeral port and will choose an address set | |
1140 | * equivalent to binding with a wildcard address. | |
1141 | */ | |
1142 | if (!ep->base.bind_addr.port) { | |
1143 | if (sctp_autobind(sk)) { | |
1144 | err = -EAGAIN; | |
1145 | goto out_free; | |
1146 | } | |
64a0c1c8 ISJ |
1147 | } else { |
1148 | /* | |
d808ad9a YH |
1149 | * If an unprivileged user inherits a 1-many |
1150 | * style socket with open associations on a | |
1151 | * privileged port, it MAY be permitted to | |
1152 | * accept new associations, but it SHOULD NOT | |
64a0c1c8 ISJ |
1153 | * be permitted to open new associations. |
1154 | */ | |
1155 | if (ep->base.bind_addr.port < PROT_SOCK && | |
3594698a | 1156 | !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE)) { |
64a0c1c8 ISJ |
1157 | err = -EACCES; |
1158 | goto out_free; | |
1159 | } | |
3f7a87d2 FF |
1160 | } |
1161 | ||
e4d1feab | 1162 | scope = sctp_scope(&to); |
3f7a87d2 FF |
1163 | asoc = sctp_association_new(ep, sk, scope, GFP_KERNEL); |
1164 | if (!asoc) { | |
1165 | err = -ENOMEM; | |
1166 | goto out_free; | |
1167 | } | |
409b95af VY |
1168 | |
1169 | err = sctp_assoc_set_bind_addr_from_ep(asoc, scope, | |
1170 | GFP_KERNEL); | |
1171 | if (err < 0) { | |
1172 | goto out_free; | |
1173 | } | |
1174 | ||
3f7a87d2 FF |
1175 | } |
1176 | ||
1177 | /* Prime the peer's transport structures. */ | |
e4d1feab | 1178 | transport = sctp_assoc_add_peer(asoc, &to, GFP_KERNEL, |
3f7a87d2 FF |
1179 | SCTP_UNKNOWN); |
1180 | if (!transport) { | |
1181 | err = -ENOMEM; | |
1182 | goto out_free; | |
1183 | } | |
1184 | ||
1185 | addrcnt++; | |
1186 | addr_buf += af->sockaddr_len; | |
1187 | walk_size += af->sockaddr_len; | |
1188 | } | |
1189 | ||
c6ba68a2 VY |
1190 | /* In case the user of sctp_connectx() wants an association |
1191 | * id back, assign one now. | |
1192 | */ | |
1193 | if (assoc_id) { | |
1194 | err = sctp_assoc_set_id(asoc, GFP_KERNEL); | |
1195 | if (err < 0) | |
1196 | goto out_free; | |
1197 | } | |
1198 | ||
55e26eb9 | 1199 | err = sctp_primitive_ASSOCIATE(net, asoc, NULL); |
3f7a87d2 FF |
1200 | if (err < 0) { |
1201 | goto out_free; | |
1202 | } | |
1203 | ||
1204 | /* Initialize sk's dport and daddr for getpeername() */ | |
c720c7e8 | 1205 | inet_sk(sk)->inet_dport = htons(asoc->peer.port); |
299ee123 | 1206 | sp->pf->to_sk_daddr(sa_addr, sk); |
8de8c873 | 1207 | sk->sk_err = 0; |
3f7a87d2 | 1208 | |
f50f95ca VY |
1209 | /* in-kernel sockets don't generally have a file allocated to them |
1210 | * if all they do is call sock_create_kern(). | |
1211 | */ | |
1212 | if (sk->sk_socket->file) | |
1213 | f_flags = sk->sk_socket->file->f_flags; | |
1214 | ||
1215 | timeo = sock_sndtimeo(sk, f_flags & O_NONBLOCK); | |
1216 | ||
3f7a87d2 | 1217 | err = sctp_wait_for_connect(asoc, &timeo); |
c6ba68a2 | 1218 | if ((err == 0 || err == -EINPROGRESS) && assoc_id) |
88a0a948 | 1219 | *assoc_id = asoc->assoc_id; |
3f7a87d2 FF |
1220 | |
1221 | /* Don't free association on exit. */ | |
1222 | asoc = NULL; | |
1223 | ||
1224 | out_free: | |
bb33381d DB |
1225 | pr_debug("%s: took out_free path with asoc:%p kaddrs:%p err:%d\n", |
1226 | __func__, asoc, kaddrs, err); | |
3f7a87d2 | 1227 | |
2eebc1e1 NH |
1228 | if (asoc) { |
1229 | /* sctp_primitive_ASSOCIATE may have added this association | |
1230 | * To the hash table, try to unhash it, just in case, its a noop | |
1231 | * if it wasn't hashed so we're safe | |
1232 | */ | |
3f7a87d2 | 1233 | sctp_association_free(asoc); |
2eebc1e1 | 1234 | } |
3f7a87d2 FF |
1235 | return err; |
1236 | } | |
1237 | ||
1238 | /* Helper for tunneling sctp_connectx() requests through sctp_setsockopt() | |
1239 | * | |
1240 | * API 8.9 | |
88a0a948 VY |
1241 | * int sctp_connectx(int sd, struct sockaddr *addrs, int addrcnt, |
1242 | * sctp_assoc_t *asoc); | |
3f7a87d2 FF |
1243 | * |
1244 | * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses. | |
1245 | * If the sd is an IPv6 socket, the addresses passed can either be IPv4 | |
1246 | * or IPv6 addresses. | |
1247 | * | |
1248 | * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see | |
1249 | * Section 3.1.2 for this usage. | |
1250 | * | |
1251 | * addrs is a pointer to an array of one or more socket addresses. Each | |
1252 | * address is contained in its appropriate structure (i.e. struct | |
1253 | * sockaddr_in or struct sockaddr_in6) the family of the address type | |
1254 | * must be used to distengish the address length (note that this | |
1255 | * representation is termed a "packed array" of addresses). The caller | |
1256 | * specifies the number of addresses in the array with addrcnt. | |
1257 | * | |
88a0a948 VY |
1258 | * On success, sctp_connectx() returns 0. It also sets the assoc_id to |
1259 | * the association id of the new association. On failure, sctp_connectx() | |
1260 | * returns -1, and sets errno to the appropriate error code. The assoc_id | |
1261 | * is not touched by the kernel. | |
3f7a87d2 FF |
1262 | * |
1263 | * For SCTP, the port given in each socket address must be the same, or | |
1264 | * sctp_connectx() will fail, setting errno to EINVAL. | |
1265 | * | |
1266 | * An application can use sctp_connectx to initiate an association with | |
1267 | * an endpoint that is multi-homed. Much like sctp_bindx() this call | |
1268 | * allows a caller to specify multiple addresses at which a peer can be | |
1269 | * reached. The way the SCTP stack uses the list of addresses to set up | |
25985edc | 1270 | * the association is implementation dependent. This function only |
3f7a87d2 FF |
1271 | * specifies that the stack will try to make use of all the addresses in |
1272 | * the list when needed. | |
1273 | * | |
1274 | * Note that the list of addresses passed in is only used for setting up | |
1275 | * the association. It does not necessarily equal the set of addresses | |
1276 | * the peer uses for the resulting association. If the caller wants to | |
1277 | * find out the set of peer addresses, it must use sctp_getpaddrs() to | |
1278 | * retrieve them after the association has been set up. | |
1279 | * | |
1280 | * Basically do nothing but copying the addresses from user to kernel | |
1281 | * land and invoking either sctp_connectx(). This is used for tunneling | |
1282 | * the sctp_connectx() request through sctp_setsockopt() from userspace. | |
1283 | * | |
1284 | * We don't use copy_from_user() for optimization: we first do the | |
1285 | * sanity checks (buffer size -fast- and access check-healthy | |
1286 | * pointer); if all of those succeed, then we can alloc the memory | |
1287 | * (expensive operation) needed to copy the data to kernel. Then we do | |
1288 | * the copying without checking the user space area | |
1289 | * (__copy_from_user()). | |
1290 | * | |
1291 | * On exit there is no need to do sockfd_put(), sys_setsockopt() does | |
1292 | * it. | |
1293 | * | |
1294 | * sk The sk of the socket | |
1295 | * addrs The pointer to the addresses in user land | |
1296 | * addrssize Size of the addrs buffer | |
1297 | * | |
88a0a948 | 1298 | * Returns >=0 if ok, <0 errno code on error. |
3f7a87d2 | 1299 | */ |
26ac8e5f | 1300 | static int __sctp_setsockopt_connectx(struct sock *sk, |
3f7a87d2 | 1301 | struct sockaddr __user *addrs, |
88a0a948 VY |
1302 | int addrs_size, |
1303 | sctp_assoc_t *assoc_id) | |
3f7a87d2 | 1304 | { |
3f7a87d2 | 1305 | struct sockaddr *kaddrs; |
9ba0b963 MRL |
1306 | gfp_t gfp = GFP_KERNEL; |
1307 | int err = 0; | |
3f7a87d2 | 1308 | |
bb33381d DB |
1309 | pr_debug("%s: sk:%p addrs:%p addrs_size:%d\n", |
1310 | __func__, sk, addrs, addrs_size); | |
3f7a87d2 FF |
1311 | |
1312 | if (unlikely(addrs_size <= 0)) | |
1313 | return -EINVAL; | |
1314 | ||
1315 | /* Check the user passed a healthy pointer. */ | |
1316 | if (unlikely(!access_ok(VERIFY_READ, addrs, addrs_size))) | |
1317 | return -EFAULT; | |
1318 | ||
1319 | /* Alloc space for the address array in kernel memory. */ | |
9ba0b963 MRL |
1320 | if (sk->sk_socket->file) |
1321 | gfp = GFP_USER | __GFP_NOWARN; | |
1322 | kaddrs = kmalloc(addrs_size, gfp); | |
3f7a87d2 FF |
1323 | if (unlikely(!kaddrs)) |
1324 | return -ENOMEM; | |
1325 | ||
1326 | if (__copy_from_user(kaddrs, addrs, addrs_size)) { | |
1327 | err = -EFAULT; | |
1328 | } else { | |
88a0a948 | 1329 | err = __sctp_connect(sk, kaddrs, addrs_size, assoc_id); |
3f7a87d2 FF |
1330 | } |
1331 | ||
1332 | kfree(kaddrs); | |
88a0a948 | 1333 | |
3f7a87d2 FF |
1334 | return err; |
1335 | } | |
1336 | ||
88a0a948 VY |
1337 | /* |
1338 | * This is an older interface. It's kept for backward compatibility | |
1339 | * to the option that doesn't provide association id. | |
1340 | */ | |
26ac8e5f | 1341 | static int sctp_setsockopt_connectx_old(struct sock *sk, |
dda91928 DB |
1342 | struct sockaddr __user *addrs, |
1343 | int addrs_size) | |
88a0a948 VY |
1344 | { |
1345 | return __sctp_setsockopt_connectx(sk, addrs, addrs_size, NULL); | |
1346 | } | |
1347 | ||
1348 | /* | |
1349 | * New interface for the API. The since the API is done with a socket | |
1350 | * option, to make it simple we feed back the association id is as a return | |
1351 | * indication to the call. Error is always negative and association id is | |
1352 | * always positive. | |
1353 | */ | |
26ac8e5f | 1354 | static int sctp_setsockopt_connectx(struct sock *sk, |
dda91928 DB |
1355 | struct sockaddr __user *addrs, |
1356 | int addrs_size) | |
88a0a948 VY |
1357 | { |
1358 | sctp_assoc_t assoc_id = 0; | |
1359 | int err = 0; | |
1360 | ||
1361 | err = __sctp_setsockopt_connectx(sk, addrs, addrs_size, &assoc_id); | |
1362 | ||
1363 | if (err) | |
1364 | return err; | |
1365 | else | |
1366 | return assoc_id; | |
1367 | } | |
1368 | ||
c6ba68a2 | 1369 | /* |
f9c67811 VY |
1370 | * New (hopefully final) interface for the API. |
1371 | * We use the sctp_getaddrs_old structure so that use-space library | |
ffd59393 | 1372 | * can avoid any unnecessary allocations. The only different part |
f9c67811 | 1373 | * is that we store the actual length of the address buffer into the |
ffd59393 | 1374 | * addrs_num structure member. That way we can re-use the existing |
f9c67811 | 1375 | * code. |
c6ba68a2 | 1376 | */ |
ffd59393 DB |
1377 | #ifdef CONFIG_COMPAT |
1378 | struct compat_sctp_getaddrs_old { | |
1379 | sctp_assoc_t assoc_id; | |
1380 | s32 addr_num; | |
1381 | compat_uptr_t addrs; /* struct sockaddr * */ | |
1382 | }; | |
1383 | #endif | |
1384 | ||
26ac8e5f | 1385 | static int sctp_getsockopt_connectx3(struct sock *sk, int len, |
dda91928 DB |
1386 | char __user *optval, |
1387 | int __user *optlen) | |
c6ba68a2 | 1388 | { |
f9c67811 | 1389 | struct sctp_getaddrs_old param; |
c6ba68a2 VY |
1390 | sctp_assoc_t assoc_id = 0; |
1391 | int err = 0; | |
1392 | ||
ffd59393 | 1393 | #ifdef CONFIG_COMPAT |
96c0e0a9 | 1394 | if (in_compat_syscall()) { |
ffd59393 | 1395 | struct compat_sctp_getaddrs_old param32; |
c6ba68a2 | 1396 | |
ffd59393 DB |
1397 | if (len < sizeof(param32)) |
1398 | return -EINVAL; | |
1399 | if (copy_from_user(¶m32, optval, sizeof(param32))) | |
1400 | return -EFAULT; | |
f9c67811 | 1401 | |
ffd59393 DB |
1402 | param.assoc_id = param32.assoc_id; |
1403 | param.addr_num = param32.addr_num; | |
1404 | param.addrs = compat_ptr(param32.addrs); | |
1405 | } else | |
1406 | #endif | |
1407 | { | |
1408 | if (len < sizeof(param)) | |
1409 | return -EINVAL; | |
1410 | if (copy_from_user(¶m, optval, sizeof(param))) | |
1411 | return -EFAULT; | |
1412 | } | |
c6ba68a2 | 1413 | |
ffd59393 DB |
1414 | err = __sctp_setsockopt_connectx(sk, (struct sockaddr __user *) |
1415 | param.addrs, param.addr_num, | |
1416 | &assoc_id); | |
c6ba68a2 VY |
1417 | if (err == 0 || err == -EINPROGRESS) { |
1418 | if (copy_to_user(optval, &assoc_id, sizeof(assoc_id))) | |
1419 | return -EFAULT; | |
1420 | if (put_user(sizeof(assoc_id), optlen)) | |
1421 | return -EFAULT; | |
1422 | } | |
1423 | ||
1424 | return err; | |
1425 | } | |
1426 | ||
1da177e4 LT |
1427 | /* API 3.1.4 close() - UDP Style Syntax |
1428 | * Applications use close() to perform graceful shutdown (as described in | |
1429 | * Section 10.1 of [SCTP]) on ALL the associations currently represented | |
1430 | * by a UDP-style socket. | |
1431 | * | |
1432 | * The syntax is | |
1433 | * | |
1434 | * ret = close(int sd); | |
1435 | * | |
1436 | * sd - the socket descriptor of the associations to be closed. | |
1437 | * | |
1438 | * To gracefully shutdown a specific association represented by the | |
1439 | * UDP-style socket, an application should use the sendmsg() call, | |
1440 | * passing no user data, but including the appropriate flag in the | |
1441 | * ancillary data (see Section xxxx). | |
1442 | * | |
1443 | * If sd in the close() call is a branched-off socket representing only | |
1444 | * one association, the shutdown is performed on that association only. | |
1445 | * | |
1446 | * 4.1.6 close() - TCP Style Syntax | |
1447 | * | |
1448 | * Applications use close() to gracefully close down an association. | |
1449 | * | |
1450 | * The syntax is: | |
1451 | * | |
1452 | * int close(int sd); | |
1453 | * | |
1454 | * sd - the socket descriptor of the association to be closed. | |
1455 | * | |
1456 | * After an application calls close() on a socket descriptor, no further | |
1457 | * socket operations will succeed on that descriptor. | |
1458 | * | |
1459 | * API 7.1.4 SO_LINGER | |
1460 | * | |
1461 | * An application using the TCP-style socket can use this option to | |
1462 | * perform the SCTP ABORT primitive. The linger option structure is: | |
1463 | * | |
1464 | * struct linger { | |
1465 | * int l_onoff; // option on/off | |
1466 | * int l_linger; // linger time | |
1467 | * }; | |
1468 | * | |
1469 | * To enable the option, set l_onoff to 1. If the l_linger value is set | |
1470 | * to 0, calling close() is the same as the ABORT primitive. If the | |
1471 | * value is set to a negative value, the setsockopt() call will return | |
1472 | * an error. If the value is set to a positive value linger_time, the | |
1473 | * close() can be blocked for at most linger_time ms. If the graceful | |
1474 | * shutdown phase does not finish during this period, close() will | |
1475 | * return but the graceful shutdown phase continues in the system. | |
1476 | */ | |
dda91928 | 1477 | static void sctp_close(struct sock *sk, long timeout) |
1da177e4 | 1478 | { |
55e26eb9 | 1479 | struct net *net = sock_net(sk); |
1da177e4 LT |
1480 | struct sctp_endpoint *ep; |
1481 | struct sctp_association *asoc; | |
1482 | struct list_head *pos, *temp; | |
cd4fcc70 | 1483 | unsigned int data_was_unread; |
1da177e4 | 1484 | |
bb33381d | 1485 | pr_debug("%s: sk:%p, timeout:%ld\n", __func__, sk, timeout); |
1da177e4 | 1486 | |
048ed4b6 | 1487 | lock_sock(sk); |
1da177e4 | 1488 | sk->sk_shutdown = SHUTDOWN_MASK; |
bec9640b | 1489 | sk->sk_state = SCTP_SS_CLOSING; |
1da177e4 LT |
1490 | |
1491 | ep = sctp_sk(sk)->ep; | |
1492 | ||
cd4fcc70 TG |
1493 | /* Clean up any skbs sitting on the receive queue. */ |
1494 | data_was_unread = sctp_queue_purge_ulpevents(&sk->sk_receive_queue); | |
1495 | data_was_unread += sctp_queue_purge_ulpevents(&sctp_sk(sk)->pd_lobby); | |
1496 | ||
61c9fed4 | 1497 | /* Walk all associations on an endpoint. */ |
1da177e4 LT |
1498 | list_for_each_safe(pos, temp, &ep->asocs) { |
1499 | asoc = list_entry(pos, struct sctp_association, asocs); | |
1500 | ||
1501 | if (sctp_style(sk, TCP)) { | |
1502 | /* A closed association can still be in the list if | |
1503 | * it belongs to a TCP-style listening socket that is | |
1504 | * not yet accepted. If so, free it. If not, send an | |
1505 | * ABORT or SHUTDOWN based on the linger options. | |
1506 | */ | |
1507 | if (sctp_state(asoc, CLOSED)) { | |
1da177e4 | 1508 | sctp_association_free(asoc); |
b89498a1 VY |
1509 | continue; |
1510 | } | |
1511 | } | |
1da177e4 | 1512 | |
cd4fcc70 TG |
1513 | if (data_was_unread || !skb_queue_empty(&asoc->ulpq.lobby) || |
1514 | !skb_queue_empty(&asoc->ulpq.reasm) || | |
1515 | (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime)) { | |
b9ac8672 SS |
1516 | struct sctp_chunk *chunk; |
1517 | ||
1518 | chunk = sctp_make_abort_user(asoc, NULL, 0); | |
068d8bd3 | 1519 | sctp_primitive_ABORT(net, asoc, chunk); |
b9ac8672 | 1520 | } else |
55e26eb9 | 1521 | sctp_primitive_SHUTDOWN(net, asoc, NULL); |
1da177e4 LT |
1522 | } |
1523 | ||
1da177e4 LT |
1524 | /* On a TCP-style socket, block for at most linger_time if set. */ |
1525 | if (sctp_style(sk, TCP) && timeout) | |
1526 | sctp_wait_for_close(sk, timeout); | |
1527 | ||
1528 | /* This will run the backlog queue. */ | |
048ed4b6 | 1529 | release_sock(sk); |
1da177e4 LT |
1530 | |
1531 | /* Supposedly, no process has access to the socket, but | |
1532 | * the net layers still may. | |
2d45a02d MRL |
1533 | * Also, sctp_destroy_sock() needs to be called with addr_wq_lock |
1534 | * held and that should be grabbed before socket lock. | |
1da177e4 | 1535 | */ |
2d45a02d | 1536 | spin_lock_bh(&net->sctp.addr_wq_lock); |
5bc1d1b4 | 1537 | bh_lock_sock(sk); |
1da177e4 LT |
1538 | |
1539 | /* Hold the sock, since sk_common_release() will put sock_put() | |
1540 | * and we have just a little more cleanup. | |
1541 | */ | |
1542 | sock_hold(sk); | |
1543 | sk_common_release(sk); | |
1544 | ||
5bc1d1b4 | 1545 | bh_unlock_sock(sk); |
2d45a02d | 1546 | spin_unlock_bh(&net->sctp.addr_wq_lock); |
1da177e4 LT |
1547 | |
1548 | sock_put(sk); | |
1549 | ||
1550 | SCTP_DBG_OBJCNT_DEC(sock); | |
1551 | } | |
1552 | ||
1553 | /* Handle EPIPE error. */ | |
1554 | static int sctp_error(struct sock *sk, int flags, int err) | |
1555 | { | |
1556 | if (err == -EPIPE) | |
1557 | err = sock_error(sk) ? : -EPIPE; | |
1558 | if (err == -EPIPE && !(flags & MSG_NOSIGNAL)) | |
1559 | send_sig(SIGPIPE, current, 0); | |
1560 | return err; | |
1561 | } | |
1562 | ||
1563 | /* API 3.1.3 sendmsg() - UDP Style Syntax | |
1564 | * | |
1565 | * An application uses sendmsg() and recvmsg() calls to transmit data to | |
1566 | * and receive data from its peer. | |
1567 | * | |
1568 | * ssize_t sendmsg(int socket, const struct msghdr *message, | |
1569 | * int flags); | |
1570 | * | |
1571 | * socket - the socket descriptor of the endpoint. | |
1572 | * message - pointer to the msghdr structure which contains a single | |
1573 | * user message and possibly some ancillary data. | |
1574 | * | |
1575 | * See Section 5 for complete description of the data | |
1576 | * structures. | |
1577 | * | |
1578 | * flags - flags sent or received with the user message, see Section | |
1579 | * 5 for complete description of the flags. | |
1580 | * | |
1581 | * Note: This function could use a rewrite especially when explicit | |
1582 | * connect support comes in. | |
1583 | */ | |
1584 | /* BUG: We do not implement the equivalent of sk_stream_wait_memory(). */ | |
1585 | ||
dda91928 | 1586 | static int sctp_msghdr_parse(const struct msghdr *, sctp_cmsgs_t *); |
1da177e4 | 1587 | |
1b784140 | 1588 | static int sctp_sendmsg(struct sock *sk, struct msghdr *msg, size_t msg_len) |
1da177e4 | 1589 | { |
55e26eb9 | 1590 | struct net *net = sock_net(sk); |
1da177e4 LT |
1591 | struct sctp_sock *sp; |
1592 | struct sctp_endpoint *ep; | |
cb3f837b | 1593 | struct sctp_association *new_asoc = NULL, *asoc = NULL; |
1da177e4 LT |
1594 | struct sctp_transport *transport, *chunk_tp; |
1595 | struct sctp_chunk *chunk; | |
dce116ae | 1596 | union sctp_addr to; |
1da177e4 | 1597 | struct sockaddr *msg_name = NULL; |
517aa0bc | 1598 | struct sctp_sndrcvinfo default_sinfo; |
1da177e4 LT |
1599 | struct sctp_sndrcvinfo *sinfo; |
1600 | struct sctp_initmsg *sinit; | |
1601 | sctp_assoc_t associd = 0; | |
1602 | sctp_cmsgs_t cmsgs = { NULL }; | |
1da177e4 | 1603 | sctp_scope_t scope; |
2061dcd6 | 1604 | bool fill_sinfo_ttl = false, wait_connect = false; |
1da177e4 | 1605 | struct sctp_datamsg *datamsg; |
1da177e4 | 1606 | int msg_flags = msg->msg_flags; |
63b94938 GOV |
1607 | __u16 sinfo_flags = 0; |
1608 | long timeo; | |
1609 | int err; | |
1da177e4 | 1610 | |
1da177e4 LT |
1611 | err = 0; |
1612 | sp = sctp_sk(sk); | |
1613 | ep = sp->ep; | |
1614 | ||
bb33381d DB |
1615 | pr_debug("%s: sk:%p, msg:%p, msg_len:%zu ep:%p\n", __func__, sk, |
1616 | msg, msg_len, ep); | |
1da177e4 LT |
1617 | |
1618 | /* We cannot send a message over a TCP-style listening socket. */ | |
1619 | if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING)) { | |
1620 | err = -EPIPE; | |
1621 | goto out_nounlock; | |
1622 | } | |
1623 | ||
1624 | /* Parse out the SCTP CMSGs. */ | |
1625 | err = sctp_msghdr_parse(msg, &cmsgs); | |
1da177e4 | 1626 | if (err) { |
bb33381d | 1627 | pr_debug("%s: msghdr parse err:%x\n", __func__, err); |
1da177e4 LT |
1628 | goto out_nounlock; |
1629 | } | |
1630 | ||
1631 | /* Fetch the destination address for this packet. This | |
1632 | * address only selects the association--it is not necessarily | |
1633 | * the address we will send to. | |
1634 | * For a peeled-off socket, msg_name is ignored. | |
1635 | */ | |
1636 | if (!sctp_style(sk, UDP_HIGH_BANDWIDTH) && msg->msg_name) { | |
1637 | int msg_namelen = msg->msg_namelen; | |
1638 | ||
1639 | err = sctp_verify_addr(sk, (union sctp_addr *)msg->msg_name, | |
1640 | msg_namelen); | |
1641 | if (err) | |
1642 | return err; | |
1643 | ||
1644 | if (msg_namelen > sizeof(to)) | |
1645 | msg_namelen = sizeof(to); | |
1646 | memcpy(&to, msg->msg_name, msg_namelen); | |
1da177e4 LT |
1647 | msg_name = msg->msg_name; |
1648 | } | |
1649 | ||
1da177e4 | 1650 | sinit = cmsgs.init; |
63b94938 GOV |
1651 | if (cmsgs.sinfo != NULL) { |
1652 | memset(&default_sinfo, 0, sizeof(default_sinfo)); | |
1653 | default_sinfo.sinfo_stream = cmsgs.sinfo->snd_sid; | |
1654 | default_sinfo.sinfo_flags = cmsgs.sinfo->snd_flags; | |
1655 | default_sinfo.sinfo_ppid = cmsgs.sinfo->snd_ppid; | |
1656 | default_sinfo.sinfo_context = cmsgs.sinfo->snd_context; | |
1657 | default_sinfo.sinfo_assoc_id = cmsgs.sinfo->snd_assoc_id; | |
1da177e4 | 1658 | |
63b94938 GOV |
1659 | sinfo = &default_sinfo; |
1660 | fill_sinfo_ttl = true; | |
1661 | } else { | |
1662 | sinfo = cmsgs.srinfo; | |
1663 | } | |
1664 | /* Did the user specify SNDINFO/SNDRCVINFO? */ | |
1da177e4 LT |
1665 | if (sinfo) { |
1666 | sinfo_flags = sinfo->sinfo_flags; | |
1667 | associd = sinfo->sinfo_assoc_id; | |
1668 | } | |
1669 | ||
bb33381d DB |
1670 | pr_debug("%s: msg_len:%zu, sinfo_flags:0x%x\n", __func__, |
1671 | msg_len, sinfo_flags); | |
1da177e4 | 1672 | |
eaa5c54d ISJ |
1673 | /* SCTP_EOF or SCTP_ABORT cannot be set on a TCP-style socket. */ |
1674 | if (sctp_style(sk, TCP) && (sinfo_flags & (SCTP_EOF | SCTP_ABORT))) { | |
1da177e4 LT |
1675 | err = -EINVAL; |
1676 | goto out_nounlock; | |
1677 | } | |
1678 | ||
eaa5c54d ISJ |
1679 | /* If SCTP_EOF is set, no data can be sent. Disallow sending zero |
1680 | * length messages when SCTP_EOF|SCTP_ABORT is not set. | |
1681 | * If SCTP_ABORT is set, the message length could be non zero with | |
1da177e4 | 1682 | * the msg_iov set to the user abort reason. |
d808ad9a | 1683 | */ |
eaa5c54d ISJ |
1684 | if (((sinfo_flags & SCTP_EOF) && (msg_len > 0)) || |
1685 | (!(sinfo_flags & (SCTP_EOF|SCTP_ABORT)) && (msg_len == 0))) { | |
1da177e4 LT |
1686 | err = -EINVAL; |
1687 | goto out_nounlock; | |
1688 | } | |
1689 | ||
eaa5c54d | 1690 | /* If SCTP_ADDR_OVER is set, there must be an address |
1da177e4 LT |
1691 | * specified in msg_name. |
1692 | */ | |
eaa5c54d | 1693 | if ((sinfo_flags & SCTP_ADDR_OVER) && (!msg->msg_name)) { |
1da177e4 LT |
1694 | err = -EINVAL; |
1695 | goto out_nounlock; | |
1696 | } | |
1697 | ||
1698 | transport = NULL; | |
1699 | ||
bb33381d | 1700 | pr_debug("%s: about to look up association\n", __func__); |
1da177e4 | 1701 | |
048ed4b6 | 1702 | lock_sock(sk); |
1da177e4 LT |
1703 | |
1704 | /* If a msg_name has been specified, assume this is to be used. */ | |
1705 | if (msg_name) { | |
1706 | /* Look for a matching association on the endpoint. */ | |
dce116ae | 1707 | asoc = sctp_endpoint_lookup_assoc(ep, &to, &transport); |
e5b13f34 MRL |
1708 | |
1709 | /* If we could not find a matching association on the | |
1710 | * endpoint, make sure that it is not a TCP-style | |
1711 | * socket that already has an association or there is | |
1712 | * no peeled-off association on another socket. | |
1713 | */ | |
1714 | if (!asoc && | |
1715 | ((sctp_style(sk, TCP) && | |
1716 | (sctp_sstate(sk, ESTABLISHED) || | |
1717 | sctp_sstate(sk, CLOSING))) || | |
1718 | sctp_endpoint_is_peeled_off(ep, &to))) { | |
1719 | err = -EADDRNOTAVAIL; | |
1720 | goto out_unlock; | |
1da177e4 LT |
1721 | } |
1722 | } else { | |
1723 | asoc = sctp_id2assoc(sk, associd); | |
1724 | if (!asoc) { | |
1725 | err = -EPIPE; | |
1726 | goto out_unlock; | |
1727 | } | |
1728 | } | |
1729 | ||
1730 | if (asoc) { | |
bb33381d | 1731 | pr_debug("%s: just looked up association:%p\n", __func__, asoc); |
1da177e4 LT |
1732 | |
1733 | /* We cannot send a message on a TCP-style SCTP_SS_ESTABLISHED | |
1734 | * socket that has an association in CLOSED state. This can | |
1735 | * happen when an accepted socket has an association that is | |
1736 | * already CLOSED. | |
1737 | */ | |
1738 | if (sctp_state(asoc, CLOSED) && sctp_style(sk, TCP)) { | |
1739 | err = -EPIPE; | |
1740 | goto out_unlock; | |
1741 | } | |
1742 | ||
eaa5c54d | 1743 | if (sinfo_flags & SCTP_EOF) { |
bb33381d DB |
1744 | pr_debug("%s: shutting down association:%p\n", |
1745 | __func__, asoc); | |
1746 | ||
55e26eb9 | 1747 | sctp_primitive_SHUTDOWN(net, asoc, NULL); |
1da177e4 LT |
1748 | err = 0; |
1749 | goto out_unlock; | |
1750 | } | |
eaa5c54d | 1751 | if (sinfo_flags & SCTP_ABORT) { |
c164a9ba SS |
1752 | |
1753 | chunk = sctp_make_abort_user(asoc, msg, msg_len); | |
1754 | if (!chunk) { | |
1755 | err = -ENOMEM; | |
1756 | goto out_unlock; | |
1757 | } | |
1758 | ||
bb33381d DB |
1759 | pr_debug("%s: aborting association:%p\n", |
1760 | __func__, asoc); | |
1761 | ||
55e26eb9 | 1762 | sctp_primitive_ABORT(net, asoc, chunk); |
1da177e4 LT |
1763 | err = 0; |
1764 | goto out_unlock; | |
1765 | } | |
1766 | } | |
1767 | ||
1768 | /* Do we need to create the association? */ | |
1769 | if (!asoc) { | |
bb33381d | 1770 | pr_debug("%s: there is no association yet\n", __func__); |
1da177e4 | 1771 | |
eaa5c54d | 1772 | if (sinfo_flags & (SCTP_EOF | SCTP_ABORT)) { |
1da177e4 LT |
1773 | err = -EINVAL; |
1774 | goto out_unlock; | |
1775 | } | |
1776 | ||
1777 | /* Check for invalid stream against the stream counts, | |
1778 | * either the default or the user specified stream counts. | |
1779 | */ | |
1780 | if (sinfo) { | |
0e864b21 | 1781 | if (!sinit || !sinit->sinit_num_ostreams) { |
1da177e4 LT |
1782 | /* Check against the defaults. */ |
1783 | if (sinfo->sinfo_stream >= | |
1784 | sp->initmsg.sinit_num_ostreams) { | |
1785 | err = -EINVAL; | |
1786 | goto out_unlock; | |
1787 | } | |
1788 | } else { | |
1789 | /* Check against the requested. */ | |
1790 | if (sinfo->sinfo_stream >= | |
1791 | sinit->sinit_num_ostreams) { | |
1792 | err = -EINVAL; | |
1793 | goto out_unlock; | |
1794 | } | |
1795 | } | |
1796 | } | |
1797 | ||
1798 | /* | |
1799 | * API 3.1.2 bind() - UDP Style Syntax | |
1800 | * If a bind() or sctp_bindx() is not called prior to a | |
1801 | * sendmsg() call that initiates a new association, the | |
1802 | * system picks an ephemeral port and will choose an address | |
1803 | * set equivalent to binding with a wildcard address. | |
1804 | */ | |
1805 | if (!ep->base.bind_addr.port) { | |
1806 | if (sctp_autobind(sk)) { | |
1807 | err = -EAGAIN; | |
1808 | goto out_unlock; | |
1809 | } | |
64a0c1c8 ISJ |
1810 | } else { |
1811 | /* | |
1812 | * If an unprivileged user inherits a one-to-many | |
1813 | * style socket with open associations on a privileged | |
1814 | * port, it MAY be permitted to accept new associations, | |
1815 | * but it SHOULD NOT be permitted to open new | |
1816 | * associations. | |
1817 | */ | |
1818 | if (ep->base.bind_addr.port < PROT_SOCK && | |
3594698a | 1819 | !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE)) { |
64a0c1c8 ISJ |
1820 | err = -EACCES; |
1821 | goto out_unlock; | |
1822 | } | |
1da177e4 LT |
1823 | } |
1824 | ||
1825 | scope = sctp_scope(&to); | |
1826 | new_asoc = sctp_association_new(ep, sk, scope, GFP_KERNEL); | |
1827 | if (!new_asoc) { | |
1828 | err = -ENOMEM; | |
1829 | goto out_unlock; | |
1830 | } | |
1831 | asoc = new_asoc; | |
409b95af VY |
1832 | err = sctp_assoc_set_bind_addr_from_ep(asoc, scope, GFP_KERNEL); |
1833 | if (err < 0) { | |
1834 | err = -ENOMEM; | |
1835 | goto out_free; | |
1836 | } | |
1da177e4 LT |
1837 | |
1838 | /* If the SCTP_INIT ancillary data is specified, set all | |
1839 | * the association init values accordingly. | |
1840 | */ | |
1841 | if (sinit) { | |
1842 | if (sinit->sinit_num_ostreams) { | |
1843 | asoc->c.sinit_num_ostreams = | |
1844 | sinit->sinit_num_ostreams; | |
1845 | } | |
1846 | if (sinit->sinit_max_instreams) { | |
1847 | asoc->c.sinit_max_instreams = | |
1848 | sinit->sinit_max_instreams; | |
1849 | } | |
1850 | if (sinit->sinit_max_attempts) { | |
1851 | asoc->max_init_attempts | |
1852 | = sinit->sinit_max_attempts; | |
1853 | } | |
1854 | if (sinit->sinit_max_init_timeo) { | |
d808ad9a | 1855 | asoc->max_init_timeo = |
1da177e4 LT |
1856 | msecs_to_jiffies(sinit->sinit_max_init_timeo); |
1857 | } | |
1858 | } | |
1859 | ||
1860 | /* Prime the peer's transport structures. */ | |
dce116ae | 1861 | transport = sctp_assoc_add_peer(asoc, &to, GFP_KERNEL, SCTP_UNKNOWN); |
1da177e4 LT |
1862 | if (!transport) { |
1863 | err = -ENOMEM; | |
1864 | goto out_free; | |
1865 | } | |
1da177e4 LT |
1866 | } |
1867 | ||
1868 | /* ASSERT: we have a valid association at this point. */ | |
bb33381d | 1869 | pr_debug("%s: we have a valid association\n", __func__); |
1da177e4 LT |
1870 | |
1871 | if (!sinfo) { | |
63b94938 GOV |
1872 | /* If the user didn't specify SNDINFO/SNDRCVINFO, make up |
1873 | * one with some defaults. | |
1da177e4 | 1874 | */ |
517aa0bc | 1875 | memset(&default_sinfo, 0, sizeof(default_sinfo)); |
1da177e4 LT |
1876 | default_sinfo.sinfo_stream = asoc->default_stream; |
1877 | default_sinfo.sinfo_flags = asoc->default_flags; | |
1878 | default_sinfo.sinfo_ppid = asoc->default_ppid; | |
1879 | default_sinfo.sinfo_context = asoc->default_context; | |
1880 | default_sinfo.sinfo_timetolive = asoc->default_timetolive; | |
1881 | default_sinfo.sinfo_assoc_id = sctp_assoc2id(asoc); | |
63b94938 | 1882 | |
1da177e4 | 1883 | sinfo = &default_sinfo; |
63b94938 GOV |
1884 | } else if (fill_sinfo_ttl) { |
1885 | /* In case SNDINFO was specified, we still need to fill | |
1886 | * it with a default ttl from the assoc here. | |
1887 | */ | |
1888 | sinfo->sinfo_timetolive = asoc->default_timetolive; | |
1da177e4 LT |
1889 | } |
1890 | ||
1891 | /* API 7.1.7, the sndbuf size per association bounds the | |
1892 | * maximum size of data that can be sent in a single send call. | |
1893 | */ | |
1894 | if (msg_len > sk->sk_sndbuf) { | |
1895 | err = -EMSGSIZE; | |
1896 | goto out_free; | |
1897 | } | |
1898 | ||
8a479491 | 1899 | if (asoc->pmtu_pending) |
02f3d4ce | 1900 | sctp_assoc_pending_pmtu(sk, asoc); |
8a479491 | 1901 | |
1da177e4 LT |
1902 | /* If fragmentation is disabled and the message length exceeds the |
1903 | * association fragmentation point, return EMSGSIZE. The I-D | |
1904 | * does not specify what this error is, but this looks like | |
1905 | * a great fit. | |
1906 | */ | |
1907 | if (sctp_sk(sk)->disable_fragments && (msg_len > asoc->frag_point)) { | |
1908 | err = -EMSGSIZE; | |
1909 | goto out_free; | |
1910 | } | |
1911 | ||
afd7614c JP |
1912 | /* Check for invalid stream. */ |
1913 | if (sinfo->sinfo_stream >= asoc->c.sinit_num_ostreams) { | |
1914 | err = -EINVAL; | |
1915 | goto out_free; | |
1da177e4 LT |
1916 | } |
1917 | ||
8dbdf1f5 XL |
1918 | if (sctp_wspace(asoc) < msg_len) |
1919 | sctp_prsctp_prune(asoc, sinfo, msg_len - sctp_wspace(asoc)); | |
1920 | ||
1da177e4 LT |
1921 | timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT); |
1922 | if (!sctp_wspace(asoc)) { | |
1923 | err = sctp_wait_for_sndbuf(asoc, &timeo, msg_len); | |
1924 | if (err) | |
1925 | goto out_free; | |
1926 | } | |
1927 | ||
1928 | /* If an address is passed with the sendto/sendmsg call, it is used | |
1929 | * to override the primary destination address in the TCP model, or | |
eaa5c54d | 1930 | * when SCTP_ADDR_OVER flag is set in the UDP model. |
1da177e4 LT |
1931 | */ |
1932 | if ((sctp_style(sk, TCP) && msg_name) || | |
eaa5c54d | 1933 | (sinfo_flags & SCTP_ADDR_OVER)) { |
dce116ae | 1934 | chunk_tp = sctp_assoc_lookup_paddr(asoc, &to); |
1da177e4 LT |
1935 | if (!chunk_tp) { |
1936 | err = -EINVAL; | |
1937 | goto out_free; | |
1938 | } | |
1939 | } else | |
1940 | chunk_tp = NULL; | |
1941 | ||
1942 | /* Auto-connect, if we aren't connected already. */ | |
1943 | if (sctp_state(asoc, CLOSED)) { | |
55e26eb9 | 1944 | err = sctp_primitive_ASSOCIATE(net, asoc, NULL); |
1da177e4 LT |
1945 | if (err < 0) |
1946 | goto out_free; | |
bb33381d | 1947 | |
2061dcd6 | 1948 | wait_connect = true; |
bb33381d | 1949 | pr_debug("%s: we associated primitively\n", __func__); |
1da177e4 LT |
1950 | } |
1951 | ||
1952 | /* Break the message into multiple chunks of maximum size. */ | |
c0371da6 | 1953 | datamsg = sctp_datamsg_from_user(asoc, sinfo, &msg->msg_iter); |
6e51fe75 TR |
1954 | if (IS_ERR(datamsg)) { |
1955 | err = PTR_ERR(datamsg); | |
1da177e4 LT |
1956 | goto out_free; |
1957 | } | |
1958 | ||
1959 | /* Now send the (possibly) fragmented message. */ | |
9dbc15f0 | 1960 | list_for_each_entry(chunk, &datamsg->chunks, frag_list) { |
b61c654f XL |
1961 | sctp_chunk_hold(chunk); |
1962 | ||
1da177e4 LT |
1963 | /* Do accounting for the write space. */ |
1964 | sctp_set_owner_w(chunk); | |
1965 | ||
1966 | chunk->transport = chunk_tp; | |
1da177e4 LT |
1967 | } |
1968 | ||
9c5c62be VY |
1969 | /* Send it to the lower layers. Note: all chunks |
1970 | * must either fail or succeed. The lower layer | |
1971 | * works that way today. Keep it that way or this | |
1972 | * breaks. | |
1973 | */ | |
55e26eb9 | 1974 | err = sctp_primitive_SEND(net, asoc, datamsg); |
9c5c62be | 1975 | /* Did the lower layer accept the chunk? */ |
b61c654f XL |
1976 | if (err) { |
1977 | sctp_datamsg_free(datamsg); | |
bb33381d | 1978 | goto out_free; |
b61c654f | 1979 | } |
9c5c62be | 1980 | |
bb33381d | 1981 | pr_debug("%s: we sent primitively\n", __func__); |
9c5c62be | 1982 | |
b61c654f | 1983 | sctp_datamsg_put(datamsg); |
bb33381d | 1984 | err = msg_len; |
1da177e4 | 1985 | |
2061dcd6 DB |
1986 | if (unlikely(wait_connect)) { |
1987 | timeo = sock_sndtimeo(sk, msg_flags & MSG_DONTWAIT); | |
1988 | sctp_wait_for_connect(asoc, &timeo); | |
1989 | } | |
1990 | ||
1da177e4 LT |
1991 | /* If we are already past ASSOCIATE, the lower |
1992 | * layers are responsible for association cleanup. | |
1993 | */ | |
1994 | goto out_unlock; | |
1995 | ||
1996 | out_free: | |
b5eff712 | 1997 | if (new_asoc) |
1da177e4 LT |
1998 | sctp_association_free(asoc); |
1999 | out_unlock: | |
048ed4b6 | 2000 | release_sock(sk); |
1da177e4 LT |
2001 | |
2002 | out_nounlock: | |
2003 | return sctp_error(sk, msg_flags, err); | |
2004 | ||
2005 | #if 0 | |
2006 | do_sock_err: | |
2007 | if (msg_len) | |
2008 | err = msg_len; | |
2009 | else | |
2010 | err = sock_error(sk); | |
2011 | goto out; | |
2012 | ||
2013 | do_interrupted: | |
2014 | if (msg_len) | |
2015 | err = msg_len; | |
2016 | goto out; | |
2017 | #endif /* 0 */ | |
2018 | } | |
2019 | ||
2020 | /* This is an extended version of skb_pull() that removes the data from the | |
2021 | * start of a skb even when data is spread across the list of skb's in the | |
2022 | * frag_list. len specifies the total amount of data that needs to be removed. | |
2023 | * when 'len' bytes could be removed from the skb, it returns 0. | |
2024 | * If 'len' exceeds the total skb length, it returns the no. of bytes that | |
2025 | * could not be removed. | |
2026 | */ | |
2027 | static int sctp_skb_pull(struct sk_buff *skb, int len) | |
2028 | { | |
2029 | struct sk_buff *list; | |
2030 | int skb_len = skb_headlen(skb); | |
2031 | int rlen; | |
2032 | ||
2033 | if (len <= skb_len) { | |
2034 | __skb_pull(skb, len); | |
2035 | return 0; | |
2036 | } | |
2037 | len -= skb_len; | |
2038 | __skb_pull(skb, skb_len); | |
2039 | ||
1b003be3 | 2040 | skb_walk_frags(skb, list) { |
1da177e4 LT |
2041 | rlen = sctp_skb_pull(list, len); |
2042 | skb->len -= (len-rlen); | |
2043 | skb->data_len -= (len-rlen); | |
2044 | ||
2045 | if (!rlen) | |
2046 | return 0; | |
2047 | ||
2048 | len = rlen; | |
2049 | } | |
2050 | ||
2051 | return len; | |
2052 | } | |
2053 | ||
2054 | /* API 3.1.3 recvmsg() - UDP Style Syntax | |
2055 | * | |
2056 | * ssize_t recvmsg(int socket, struct msghdr *message, | |
2057 | * int flags); | |
2058 | * | |
2059 | * socket - the socket descriptor of the endpoint. | |
2060 | * message - pointer to the msghdr structure which contains a single | |
2061 | * user message and possibly some ancillary data. | |
2062 | * | |
2063 | * See Section 5 for complete description of the data | |
2064 | * structures. | |
2065 | * | |
2066 | * flags - flags sent or received with the user message, see Section | |
2067 | * 5 for complete description of the flags. | |
2068 | */ | |
1b784140 YX |
2069 | static int sctp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, |
2070 | int noblock, int flags, int *addr_len) | |
1da177e4 LT |
2071 | { |
2072 | struct sctp_ulpevent *event = NULL; | |
2073 | struct sctp_sock *sp = sctp_sk(sk); | |
1f45f78f | 2074 | struct sk_buff *skb, *head_skb; |
1da177e4 LT |
2075 | int copied; |
2076 | int err = 0; | |
2077 | int skb_len; | |
2078 | ||
bb33381d DB |
2079 | pr_debug("%s: sk:%p, msghdr:%p, len:%zd, noblock:%d, flags:0x%x, " |
2080 | "addr_len:%p)\n", __func__, sk, msg, len, noblock, flags, | |
2081 | addr_len); | |
1da177e4 | 2082 | |
048ed4b6 | 2083 | lock_sock(sk); |
1da177e4 | 2084 | |
e5b13f34 | 2085 | if (sctp_style(sk, TCP) && !sctp_sstate(sk, ESTABLISHED) && |
e0878694 | 2086 | !sctp_sstate(sk, CLOSING) && !sctp_sstate(sk, CLOSED)) { |
1da177e4 LT |
2087 | err = -ENOTCONN; |
2088 | goto out; | |
2089 | } | |
2090 | ||
2091 | skb = sctp_skb_recv_datagram(sk, flags, noblock, &err); | |
2092 | if (!skb) | |
2093 | goto out; | |
2094 | ||
2095 | /* Get the total length of the skb including any skb's in the | |
2096 | * frag_list. | |
2097 | */ | |
2098 | skb_len = skb->len; | |
2099 | ||
2100 | copied = skb_len; | |
2101 | if (copied > len) | |
2102 | copied = len; | |
2103 | ||
51f3d02b | 2104 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
1da177e4 LT |
2105 | |
2106 | event = sctp_skb2event(skb); | |
2107 | ||
2108 | if (err) | |
2109 | goto out_free; | |
2110 | ||
1f45f78f MRL |
2111 | if (event->chunk && event->chunk->head_skb) |
2112 | head_skb = event->chunk->head_skb; | |
2113 | else | |
2114 | head_skb = skb; | |
2115 | sock_recv_ts_and_drops(msg, sk, head_skb); | |
1da177e4 LT |
2116 | if (sctp_ulpevent_is_notification(event)) { |
2117 | msg->msg_flags |= MSG_NOTIFICATION; | |
2118 | sp->pf->event_msgname(event, msg->msg_name, addr_len); | |
2119 | } else { | |
1f45f78f | 2120 | sp->pf->skb_msgname(head_skb, msg->msg_name, addr_len); |
1da177e4 LT |
2121 | } |
2122 | ||
2347c80f GOV |
2123 | /* Check if we allow SCTP_NXTINFO. */ |
2124 | if (sp->recvnxtinfo) | |
2125 | sctp_ulpevent_read_nxtinfo(event, msg, sk); | |
0d3a421d GOV |
2126 | /* Check if we allow SCTP_RCVINFO. */ |
2127 | if (sp->recvrcvinfo) | |
2128 | sctp_ulpevent_read_rcvinfo(event, msg); | |
1da177e4 LT |
2129 | /* Check if we allow SCTP_SNDRCVINFO. */ |
2130 | if (sp->subscribe.sctp_data_io_event) | |
2131 | sctp_ulpevent_read_sndrcvinfo(event, msg); | |
0d3a421d | 2132 | |
1da177e4 LT |
2133 | err = copied; |
2134 | ||
2135 | /* If skb's length exceeds the user's buffer, update the skb and | |
2136 | * push it back to the receive_queue so that the next call to | |
2137 | * recvmsg() will return the remaining data. Don't set MSG_EOR. | |
2138 | */ | |
2139 | if (skb_len > copied) { | |
2140 | msg->msg_flags &= ~MSG_EOR; | |
2141 | if (flags & MSG_PEEK) | |
2142 | goto out_free; | |
2143 | sctp_skb_pull(skb, copied); | |
2144 | skb_queue_head(&sk->sk_receive_queue, skb); | |
2145 | ||
362d5204 DB |
2146 | /* When only partial message is copied to the user, increase |
2147 | * rwnd by that amount. If all the data in the skb is read, | |
2148 | * rwnd is updated when the event is freed. | |
2149 | */ | |
2150 | if (!sctp_ulpevent_is_notification(event)) | |
2151 | sctp_assoc_rwnd_increase(event->asoc, copied); | |
1da177e4 LT |
2152 | goto out; |
2153 | } else if ((event->msg_flags & MSG_NOTIFICATION) || | |
2154 | (event->msg_flags & MSG_EOR)) | |
2155 | msg->msg_flags |= MSG_EOR; | |
2156 | else | |
2157 | msg->msg_flags &= ~MSG_EOR; | |
2158 | ||
2159 | out_free: | |
2160 | if (flags & MSG_PEEK) { | |
2161 | /* Release the skb reference acquired after peeking the skb in | |
2162 | * sctp_skb_recv_datagram(). | |
2163 | */ | |
2164 | kfree_skb(skb); | |
2165 | } else { | |
2166 | /* Free the event which includes releasing the reference to | |
2167 | * the owner of the skb, freeing the skb and updating the | |
2168 | * rwnd. | |
2169 | */ | |
2170 | sctp_ulpevent_free(event); | |
2171 | } | |
2172 | out: | |
048ed4b6 | 2173 | release_sock(sk); |
1da177e4 LT |
2174 | return err; |
2175 | } | |
2176 | ||
2177 | /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS) | |
2178 | * | |
2179 | * This option is a on/off flag. If enabled no SCTP message | |
2180 | * fragmentation will be performed. Instead if a message being sent | |
2181 | * exceeds the current PMTU size, the message will NOT be sent and | |
2182 | * instead a error will be indicated to the user. | |
2183 | */ | |
2184 | static int sctp_setsockopt_disable_fragments(struct sock *sk, | |
b7058842 DM |
2185 | char __user *optval, |
2186 | unsigned int optlen) | |
1da177e4 LT |
2187 | { |
2188 | int val; | |
2189 | ||
2190 | if (optlen < sizeof(int)) | |
2191 | return -EINVAL; | |
2192 | ||
2193 | if (get_user(val, (int __user *)optval)) | |
2194 | return -EFAULT; | |
2195 | ||
2196 | sctp_sk(sk)->disable_fragments = (val == 0) ? 0 : 1; | |
2197 | ||
2198 | return 0; | |
2199 | } | |
2200 | ||
2201 | static int sctp_setsockopt_events(struct sock *sk, char __user *optval, | |
b7058842 | 2202 | unsigned int optlen) |
1da177e4 | 2203 | { |
94912301 WY |
2204 | struct sctp_association *asoc; |
2205 | struct sctp_ulpevent *event; | |
2206 | ||
7e8616d8 | 2207 | if (optlen > sizeof(struct sctp_event_subscribe)) |
1da177e4 LT |
2208 | return -EINVAL; |
2209 | if (copy_from_user(&sctp_sk(sk)->subscribe, optval, optlen)) | |
2210 | return -EFAULT; | |
94912301 | 2211 | |
bbbea41d | 2212 | /* At the time when a user app subscribes to SCTP_SENDER_DRY_EVENT, |
94912301 WY |
2213 | * if there is no data to be sent or retransmit, the stack will |
2214 | * immediately send up this notification. | |
2215 | */ | |
2216 | if (sctp_ulpevent_type_enabled(SCTP_SENDER_DRY_EVENT, | |
2217 | &sctp_sk(sk)->subscribe)) { | |
2218 | asoc = sctp_id2assoc(sk, 0); | |
2219 | ||
2220 | if (asoc && sctp_outq_is_empty(&asoc->outqueue)) { | |
2221 | event = sctp_ulpevent_make_sender_dry_event(asoc, | |
2222 | GFP_ATOMIC); | |
2223 | if (!event) | |
2224 | return -ENOMEM; | |
2225 | ||
2226 | sctp_ulpq_tail_event(&asoc->ulpq, event); | |
2227 | } | |
2228 | } | |
2229 | ||
1da177e4 LT |
2230 | return 0; |
2231 | } | |
2232 | ||
2233 | /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE) | |
2234 | * | |
2235 | * This socket option is applicable to the UDP-style socket only. When | |
2236 | * set it will cause associations that are idle for more than the | |
2237 | * specified number of seconds to automatically close. An association | |
2238 | * being idle is defined an association that has NOT sent or received | |
2239 | * user data. The special value of '0' indicates that no automatic | |
2240 | * close of any associations should be performed. The option expects an | |
2241 | * integer defining the number of seconds of idle time before an | |
2242 | * association is closed. | |
2243 | */ | |
2244 | static int sctp_setsockopt_autoclose(struct sock *sk, char __user *optval, | |
b7058842 | 2245 | unsigned int optlen) |
1da177e4 LT |
2246 | { |
2247 | struct sctp_sock *sp = sctp_sk(sk); | |
9f70f46b | 2248 | struct net *net = sock_net(sk); |
1da177e4 LT |
2249 | |
2250 | /* Applicable to UDP-style socket only */ | |
2251 | if (sctp_style(sk, TCP)) | |
2252 | return -EOPNOTSUPP; | |
2253 | if (optlen != sizeof(int)) | |
2254 | return -EINVAL; | |
2255 | if (copy_from_user(&sp->autoclose, optval, optlen)) | |
2256 | return -EFAULT; | |
2257 | ||
9f70f46b NH |
2258 | if (sp->autoclose > net->sctp.max_autoclose) |
2259 | sp->autoclose = net->sctp.max_autoclose; | |
2260 | ||
1da177e4 LT |
2261 | return 0; |
2262 | } | |
2263 | ||
2264 | /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS) | |
2265 | * | |
2266 | * Applications can enable or disable heartbeats for any peer address of | |
2267 | * an association, modify an address's heartbeat interval, force a | |
2268 | * heartbeat to be sent immediately, and adjust the address's maximum | |
2269 | * number of retransmissions sent before an address is considered | |
2270 | * unreachable. The following structure is used to access and modify an | |
2271 | * address's parameters: | |
2272 | * | |
2273 | * struct sctp_paddrparams { | |
52ccb8e9 FF |
2274 | * sctp_assoc_t spp_assoc_id; |
2275 | * struct sockaddr_storage spp_address; | |
2276 | * uint32_t spp_hbinterval; | |
2277 | * uint16_t spp_pathmaxrxt; | |
2278 | * uint32_t spp_pathmtu; | |
2279 | * uint32_t spp_sackdelay; | |
2280 | * uint32_t spp_flags; | |
2281 | * }; | |
2282 | * | |
2283 | * spp_assoc_id - (one-to-many style socket) This is filled in the | |
2284 | * application, and identifies the association for | |
2285 | * this query. | |
1da177e4 LT |
2286 | * spp_address - This specifies which address is of interest. |
2287 | * spp_hbinterval - This contains the value of the heartbeat interval, | |
52ccb8e9 FF |
2288 | * in milliseconds. If a value of zero |
2289 | * is present in this field then no changes are to | |
2290 | * be made to this parameter. | |
1da177e4 LT |
2291 | * spp_pathmaxrxt - This contains the maximum number of |
2292 | * retransmissions before this address shall be | |
52ccb8e9 FF |
2293 | * considered unreachable. If a value of zero |
2294 | * is present in this field then no changes are to | |
2295 | * be made to this parameter. | |
2296 | * spp_pathmtu - When Path MTU discovery is disabled the value | |
2297 | * specified here will be the "fixed" path mtu. | |
2298 | * Note that if the spp_address field is empty | |
2299 | * then all associations on this address will | |
2300 | * have this fixed path mtu set upon them. | |
2301 | * | |
2302 | * spp_sackdelay - When delayed sack is enabled, this value specifies | |
2303 | * the number of milliseconds that sacks will be delayed | |
2304 | * for. This value will apply to all addresses of an | |
2305 | * association if the spp_address field is empty. Note | |
2306 | * also, that if delayed sack is enabled and this | |
2307 | * value is set to 0, no change is made to the last | |
2308 | * recorded delayed sack timer value. | |
2309 | * | |
2310 | * spp_flags - These flags are used to control various features | |
2311 | * on an association. The flag field may contain | |
2312 | * zero or more of the following options. | |
2313 | * | |
2314 | * SPP_HB_ENABLE - Enable heartbeats on the | |
2315 | * specified address. Note that if the address | |
2316 | * field is empty all addresses for the association | |
2317 | * have heartbeats enabled upon them. | |
2318 | * | |
2319 | * SPP_HB_DISABLE - Disable heartbeats on the | |
2320 | * speicifed address. Note that if the address | |
2321 | * field is empty all addresses for the association | |
2322 | * will have their heartbeats disabled. Note also | |
2323 | * that SPP_HB_ENABLE and SPP_HB_DISABLE are | |
2324 | * mutually exclusive, only one of these two should | |
2325 | * be specified. Enabling both fields will have | |
2326 | * undetermined results. | |
2327 | * | |
2328 | * SPP_HB_DEMAND - Request a user initiated heartbeat | |
2329 | * to be made immediately. | |
2330 | * | |
bdf3092a VY |
2331 | * SPP_HB_TIME_IS_ZERO - Specify's that the time for |
2332 | * heartbeat delayis to be set to the value of 0 | |
2333 | * milliseconds. | |
2334 | * | |
52ccb8e9 FF |
2335 | * SPP_PMTUD_ENABLE - This field will enable PMTU |
2336 | * discovery upon the specified address. Note that | |
2337 | * if the address feild is empty then all addresses | |
2338 | * on the association are effected. | |
2339 | * | |
2340 | * SPP_PMTUD_DISABLE - This field will disable PMTU | |
2341 | * discovery upon the specified address. Note that | |
2342 | * if the address feild is empty then all addresses | |
2343 | * on the association are effected. Not also that | |
2344 | * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually | |
2345 | * exclusive. Enabling both will have undetermined | |
2346 | * results. | |
2347 | * | |
2348 | * SPP_SACKDELAY_ENABLE - Setting this flag turns | |
2349 | * on delayed sack. The time specified in spp_sackdelay | |
2350 | * is used to specify the sack delay for this address. Note | |
2351 | * that if spp_address is empty then all addresses will | |
2352 | * enable delayed sack and take on the sack delay | |
2353 | * value specified in spp_sackdelay. | |
2354 | * SPP_SACKDELAY_DISABLE - Setting this flag turns | |
2355 | * off delayed sack. If the spp_address field is blank then | |
2356 | * delayed sack is disabled for the entire association. Note | |
2357 | * also that this field is mutually exclusive to | |
2358 | * SPP_SACKDELAY_ENABLE, setting both will have undefined | |
2359 | * results. | |
1da177e4 | 2360 | */ |
16164366 AB |
2361 | static int sctp_apply_peer_addr_params(struct sctp_paddrparams *params, |
2362 | struct sctp_transport *trans, | |
2363 | struct sctp_association *asoc, | |
2364 | struct sctp_sock *sp, | |
2365 | int hb_change, | |
2366 | int pmtud_change, | |
2367 | int sackdelay_change) | |
52ccb8e9 FF |
2368 | { |
2369 | int error; | |
2370 | ||
2371 | if (params->spp_flags & SPP_HB_DEMAND && trans) { | |
55e26eb9 EB |
2372 | struct net *net = sock_net(trans->asoc->base.sk); |
2373 | ||
2374 | error = sctp_primitive_REQUESTHEARTBEAT(net, trans->asoc, trans); | |
52ccb8e9 FF |
2375 | if (error) |
2376 | return error; | |
2377 | } | |
2378 | ||
bdf3092a VY |
2379 | /* Note that unless the spp_flag is set to SPP_HB_ENABLE the value of |
2380 | * this field is ignored. Note also that a value of zero indicates | |
2381 | * the current setting should be left unchanged. | |
2382 | */ | |
2383 | if (params->spp_flags & SPP_HB_ENABLE) { | |
2384 | ||
2385 | /* Re-zero the interval if the SPP_HB_TIME_IS_ZERO is | |
2386 | * set. This lets us use 0 value when this flag | |
2387 | * is set. | |
2388 | */ | |
2389 | if (params->spp_flags & SPP_HB_TIME_IS_ZERO) | |
2390 | params->spp_hbinterval = 0; | |
2391 | ||
2392 | if (params->spp_hbinterval || | |
2393 | (params->spp_flags & SPP_HB_TIME_IS_ZERO)) { | |
2394 | if (trans) { | |
2395 | trans->hbinterval = | |
2396 | msecs_to_jiffies(params->spp_hbinterval); | |
2397 | } else if (asoc) { | |
2398 | asoc->hbinterval = | |
2399 | msecs_to_jiffies(params->spp_hbinterval); | |
2400 | } else { | |
2401 | sp->hbinterval = params->spp_hbinterval; | |
2402 | } | |
52ccb8e9 FF |
2403 | } |
2404 | } | |
2405 | ||
2406 | if (hb_change) { | |
2407 | if (trans) { | |
2408 | trans->param_flags = | |
2409 | (trans->param_flags & ~SPP_HB) | hb_change; | |
2410 | } else if (asoc) { | |
2411 | asoc->param_flags = | |
2412 | (asoc->param_flags & ~SPP_HB) | hb_change; | |
2413 | } else { | |
2414 | sp->param_flags = | |
2415 | (sp->param_flags & ~SPP_HB) | hb_change; | |
2416 | } | |
2417 | } | |
2418 | ||
bdf3092a VY |
2419 | /* When Path MTU discovery is disabled the value specified here will |
2420 | * be the "fixed" path mtu (i.e. the value of the spp_flags field must | |
2421 | * include the flag SPP_PMTUD_DISABLE for this field to have any | |
2422 | * effect). | |
2423 | */ | |
2424 | if ((params->spp_flags & SPP_PMTUD_DISABLE) && params->spp_pathmtu) { | |
52ccb8e9 FF |
2425 | if (trans) { |
2426 | trans->pathmtu = params->spp_pathmtu; | |
02f3d4ce | 2427 | sctp_assoc_sync_pmtu(sctp_opt2sk(sp), asoc); |
52ccb8e9 FF |
2428 | } else if (asoc) { |
2429 | asoc->pathmtu = params->spp_pathmtu; | |
f68b2e05 | 2430 | sctp_frag_point(asoc, params->spp_pathmtu); |
52ccb8e9 FF |
2431 | } else { |
2432 | sp->pathmtu = params->spp_pathmtu; | |
2433 | } | |
2434 | } | |
2435 | ||
2436 | if (pmtud_change) { | |
2437 | if (trans) { | |
2438 | int update = (trans->param_flags & SPP_PMTUD_DISABLE) && | |
2439 | (params->spp_flags & SPP_PMTUD_ENABLE); | |
2440 | trans->param_flags = | |
2441 | (trans->param_flags & ~SPP_PMTUD) | pmtud_change; | |
2442 | if (update) { | |
9914ae3c | 2443 | sctp_transport_pmtu(trans, sctp_opt2sk(sp)); |
02f3d4ce | 2444 | sctp_assoc_sync_pmtu(sctp_opt2sk(sp), asoc); |
52ccb8e9 FF |
2445 | } |
2446 | } else if (asoc) { | |
2447 | asoc->param_flags = | |
2448 | (asoc->param_flags & ~SPP_PMTUD) | pmtud_change; | |
2449 | } else { | |
2450 | sp->param_flags = | |
2451 | (sp->param_flags & ~SPP_PMTUD) | pmtud_change; | |
2452 | } | |
2453 | } | |
2454 | ||
bdf3092a VY |
2455 | /* Note that unless the spp_flag is set to SPP_SACKDELAY_ENABLE the |
2456 | * value of this field is ignored. Note also that a value of zero | |
2457 | * indicates the current setting should be left unchanged. | |
2458 | */ | |
2459 | if ((params->spp_flags & SPP_SACKDELAY_ENABLE) && params->spp_sackdelay) { | |
52ccb8e9 FF |
2460 | if (trans) { |
2461 | trans->sackdelay = | |
2462 | msecs_to_jiffies(params->spp_sackdelay); | |
2463 | } else if (asoc) { | |
2464 | asoc->sackdelay = | |
2465 | msecs_to_jiffies(params->spp_sackdelay); | |
2466 | } else { | |
2467 | sp->sackdelay = params->spp_sackdelay; | |
2468 | } | |
2469 | } | |
2470 | ||
2471 | if (sackdelay_change) { | |
2472 | if (trans) { | |
2473 | trans->param_flags = | |
2474 | (trans->param_flags & ~SPP_SACKDELAY) | | |
2475 | sackdelay_change; | |
2476 | } else if (asoc) { | |
2477 | asoc->param_flags = | |
2478 | (asoc->param_flags & ~SPP_SACKDELAY) | | |
2479 | sackdelay_change; | |
2480 | } else { | |
2481 | sp->param_flags = | |
2482 | (sp->param_flags & ~SPP_SACKDELAY) | | |
2483 | sackdelay_change; | |
2484 | } | |
2485 | } | |
2486 | ||
37051f73 APO |
2487 | /* Note that a value of zero indicates the current setting should be |
2488 | left unchanged. | |
bdf3092a | 2489 | */ |
37051f73 | 2490 | if (params->spp_pathmaxrxt) { |
52ccb8e9 FF |
2491 | if (trans) { |
2492 | trans->pathmaxrxt = params->spp_pathmaxrxt; | |
2493 | } else if (asoc) { | |
2494 | asoc->pathmaxrxt = params->spp_pathmaxrxt; | |
2495 | } else { | |
2496 | sp->pathmaxrxt = params->spp_pathmaxrxt; | |
2497 | } | |
2498 | } | |
2499 | ||
2500 | return 0; | |
2501 | } | |
2502 | ||
1da177e4 | 2503 | static int sctp_setsockopt_peer_addr_params(struct sock *sk, |
b7058842 DM |
2504 | char __user *optval, |
2505 | unsigned int optlen) | |
1da177e4 | 2506 | { |
52ccb8e9 FF |
2507 | struct sctp_paddrparams params; |
2508 | struct sctp_transport *trans = NULL; | |
2509 | struct sctp_association *asoc = NULL; | |
2510 | struct sctp_sock *sp = sctp_sk(sk); | |
1da177e4 | 2511 | int error; |
52ccb8e9 | 2512 | int hb_change, pmtud_change, sackdelay_change; |
1da177e4 LT |
2513 | |
2514 | if (optlen != sizeof(struct sctp_paddrparams)) | |
cb3f837b | 2515 | return -EINVAL; |
52ccb8e9 | 2516 | |
1da177e4 LT |
2517 | if (copy_from_user(¶ms, optval, optlen)) |
2518 | return -EFAULT; | |
2519 | ||
52ccb8e9 FF |
2520 | /* Validate flags and value parameters. */ |
2521 | hb_change = params.spp_flags & SPP_HB; | |
2522 | pmtud_change = params.spp_flags & SPP_PMTUD; | |
2523 | sackdelay_change = params.spp_flags & SPP_SACKDELAY; | |
2524 | ||
2525 | if (hb_change == SPP_HB || | |
2526 | pmtud_change == SPP_PMTUD || | |
2527 | sackdelay_change == SPP_SACKDELAY || | |
2528 | params.spp_sackdelay > 500 || | |
f64f9e71 JP |
2529 | (params.spp_pathmtu && |
2530 | params.spp_pathmtu < SCTP_DEFAULT_MINSEGMENT)) | |
52ccb8e9 | 2531 | return -EINVAL; |
1da177e4 | 2532 | |
52ccb8e9 FF |
2533 | /* If an address other than INADDR_ANY is specified, and |
2534 | * no transport is found, then the request is invalid. | |
2535 | */ | |
cb3f837b | 2536 | if (!sctp_is_any(sk, (union sctp_addr *)¶ms.spp_address)) { |
52ccb8e9 FF |
2537 | trans = sctp_addr_id2transport(sk, ¶ms.spp_address, |
2538 | params.spp_assoc_id); | |
2539 | if (!trans) | |
1da177e4 | 2540 | return -EINVAL; |
1da177e4 LT |
2541 | } |
2542 | ||
52ccb8e9 FF |
2543 | /* Get association, if assoc_id != 0 and the socket is a one |
2544 | * to many style socket, and an association was not found, then | |
2545 | * the id was invalid. | |
2546 | */ | |
2547 | asoc = sctp_id2assoc(sk, params.spp_assoc_id); | |
2548 | if (!asoc && params.spp_assoc_id && sctp_style(sk, UDP)) | |
1da177e4 LT |
2549 | return -EINVAL; |
2550 | ||
52ccb8e9 FF |
2551 | /* Heartbeat demand can only be sent on a transport or |
2552 | * association, but not a socket. | |
1da177e4 | 2553 | */ |
52ccb8e9 FF |
2554 | if (params.spp_flags & SPP_HB_DEMAND && !trans && !asoc) |
2555 | return -EINVAL; | |
2556 | ||
2557 | /* Process parameters. */ | |
2558 | error = sctp_apply_peer_addr_params(¶ms, trans, asoc, sp, | |
2559 | hb_change, pmtud_change, | |
2560 | sackdelay_change); | |
1da177e4 | 2561 | |
52ccb8e9 FF |
2562 | if (error) |
2563 | return error; | |
2564 | ||
2565 | /* If changes are for association, also apply parameters to each | |
2566 | * transport. | |
1da177e4 | 2567 | */ |
52ccb8e9 | 2568 | if (!trans && asoc) { |
9dbc15f0 RD |
2569 | list_for_each_entry(trans, &asoc->peer.transport_addr_list, |
2570 | transports) { | |
52ccb8e9 FF |
2571 | sctp_apply_peer_addr_params(¶ms, trans, asoc, sp, |
2572 | hb_change, pmtud_change, | |
2573 | sackdelay_change); | |
2574 | } | |
2575 | } | |
1da177e4 LT |
2576 | |
2577 | return 0; | |
2578 | } | |
2579 | ||
0ea5e4df | 2580 | static inline __u32 sctp_spp_sackdelay_enable(__u32 param_flags) |
2581 | { | |
2582 | return (param_flags & ~SPP_SACKDELAY) | SPP_SACKDELAY_ENABLE; | |
2583 | } | |
2584 | ||
2585 | static inline __u32 sctp_spp_sackdelay_disable(__u32 param_flags) | |
2586 | { | |
2587 | return (param_flags & ~SPP_SACKDELAY) | SPP_SACKDELAY_DISABLE; | |
2588 | } | |
2589 | ||
d364d927 WY |
2590 | /* |
2591 | * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK) | |
2592 | * | |
2593 | * This option will effect the way delayed acks are performed. This | |
2594 | * option allows you to get or set the delayed ack time, in | |
2595 | * milliseconds. It also allows changing the delayed ack frequency. | |
2596 | * Changing the frequency to 1 disables the delayed sack algorithm. If | |
2597 | * the assoc_id is 0, then this sets or gets the endpoints default | |
2598 | * values. If the assoc_id field is non-zero, then the set or get | |
2599 | * effects the specified association for the one to many model (the | |
2600 | * assoc_id field is ignored by the one to one model). Note that if | |
2601 | * sack_delay or sack_freq are 0 when setting this option, then the | |
2602 | * current values will remain unchanged. | |
2603 | * | |
2604 | * struct sctp_sack_info { | |
2605 | * sctp_assoc_t sack_assoc_id; | |
2606 | * uint32_t sack_delay; | |
2607 | * uint32_t sack_freq; | |
2608 | * }; | |
2609 | * | |
2610 | * sack_assoc_id - This parameter, indicates which association the user | |
2611 | * is performing an action upon. Note that if this field's value is | |
2612 | * zero then the endpoints default value is changed (effecting future | |
2613 | * associations only). | |
2614 | * | |
2615 | * sack_delay - This parameter contains the number of milliseconds that | |
2616 | * the user is requesting the delayed ACK timer be set to. Note that | |
2617 | * this value is defined in the standard to be between 200 and 500 | |
2618 | * milliseconds. | |
2619 | * | |
2620 | * sack_freq - This parameter contains the number of packets that must | |
2621 | * be received before a sack is sent without waiting for the delay | |
2622 | * timer to expire. The default value for this is 2, setting this | |
2623 | * value to 1 will disable the delayed sack algorithm. | |
7708610b FF |
2624 | */ |
2625 | ||
d364d927 | 2626 | static int sctp_setsockopt_delayed_ack(struct sock *sk, |
b7058842 | 2627 | char __user *optval, unsigned int optlen) |
7708610b | 2628 | { |
d364d927 | 2629 | struct sctp_sack_info params; |
7708610b FF |
2630 | struct sctp_transport *trans = NULL; |
2631 | struct sctp_association *asoc = NULL; | |
2632 | struct sctp_sock *sp = sctp_sk(sk); | |
2633 | ||
d364d927 WY |
2634 | if (optlen == sizeof(struct sctp_sack_info)) { |
2635 | if (copy_from_user(¶ms, optval, optlen)) | |
2636 | return -EFAULT; | |
7708610b | 2637 | |
d364d927 WY |
2638 | if (params.sack_delay == 0 && params.sack_freq == 0) |
2639 | return 0; | |
2640 | } else if (optlen == sizeof(struct sctp_assoc_value)) { | |
94f65193 | 2641 | pr_warn_ratelimited(DEPRECATED |
f916ec96 | 2642 | "%s (pid %d) " |
94f65193 | 2643 | "Use of struct sctp_assoc_value in delayed_ack socket option.\n" |
f916ec96 NH |
2644 | "Use struct sctp_sack_info instead\n", |
2645 | current->comm, task_pid_nr(current)); | |
d364d927 WY |
2646 | if (copy_from_user(¶ms, optval, optlen)) |
2647 | return -EFAULT; | |
2648 | ||
2649 | if (params.sack_delay == 0) | |
2650 | params.sack_freq = 1; | |
2651 | else | |
2652 | params.sack_freq = 0; | |
2653 | } else | |
cb3f837b | 2654 | return -EINVAL; |
7708610b FF |
2655 | |
2656 | /* Validate value parameter. */ | |
d364d927 | 2657 | if (params.sack_delay > 500) |
7708610b FF |
2658 | return -EINVAL; |
2659 | ||
d364d927 | 2660 | /* Get association, if sack_assoc_id != 0 and the socket is a one |
7708610b FF |
2661 | * to many style socket, and an association was not found, then |
2662 | * the id was invalid. | |
d808ad9a | 2663 | */ |
d364d927 WY |
2664 | asoc = sctp_id2assoc(sk, params.sack_assoc_id); |
2665 | if (!asoc && params.sack_assoc_id && sctp_style(sk, UDP)) | |
7708610b FF |
2666 | return -EINVAL; |
2667 | ||
d364d927 | 2668 | if (params.sack_delay) { |
7708610b FF |
2669 | if (asoc) { |
2670 | asoc->sackdelay = | |
d364d927 | 2671 | msecs_to_jiffies(params.sack_delay); |
d808ad9a | 2672 | asoc->param_flags = |
0ea5e4df | 2673 | sctp_spp_sackdelay_enable(asoc->param_flags); |
7708610b | 2674 | } else { |
d364d927 | 2675 | sp->sackdelay = params.sack_delay; |
d808ad9a | 2676 | sp->param_flags = |
0ea5e4df | 2677 | sctp_spp_sackdelay_enable(sp->param_flags); |
7708610b | 2678 | } |
d364d927 WY |
2679 | } |
2680 | ||
2681 | if (params.sack_freq == 1) { | |
7708610b | 2682 | if (asoc) { |
d808ad9a | 2683 | asoc->param_flags = |
0ea5e4df | 2684 | sctp_spp_sackdelay_disable(asoc->param_flags); |
7708610b | 2685 | } else { |
d808ad9a | 2686 | sp->param_flags = |
0ea5e4df | 2687 | sctp_spp_sackdelay_disable(sp->param_flags); |
7708610b | 2688 | } |
d364d927 WY |
2689 | } else if (params.sack_freq > 1) { |
2690 | if (asoc) { | |
2691 | asoc->sackfreq = params.sack_freq; | |
2692 | asoc->param_flags = | |
0ea5e4df | 2693 | sctp_spp_sackdelay_enable(asoc->param_flags); |
d364d927 WY |
2694 | } else { |
2695 | sp->sackfreq = params.sack_freq; | |
2696 | sp->param_flags = | |
0ea5e4df | 2697 | sctp_spp_sackdelay_enable(sp->param_flags); |
d364d927 | 2698 | } |
7708610b FF |
2699 | } |
2700 | ||
2701 | /* If change is for association, also apply to each transport. */ | |
2702 | if (asoc) { | |
9dbc15f0 RD |
2703 | list_for_each_entry(trans, &asoc->peer.transport_addr_list, |
2704 | transports) { | |
d364d927 | 2705 | if (params.sack_delay) { |
7708610b | 2706 | trans->sackdelay = |
d364d927 | 2707 | msecs_to_jiffies(params.sack_delay); |
d808ad9a | 2708 | trans->param_flags = |
0ea5e4df | 2709 | sctp_spp_sackdelay_enable(trans->param_flags); |
d364d927 | 2710 | } |
7bfe8bdb | 2711 | if (params.sack_freq == 1) { |
d808ad9a | 2712 | trans->param_flags = |
0ea5e4df | 2713 | sctp_spp_sackdelay_disable(trans->param_flags); |
d364d927 WY |
2714 | } else if (params.sack_freq > 1) { |
2715 | trans->sackfreq = params.sack_freq; | |
2716 | trans->param_flags = | |
0ea5e4df | 2717 | sctp_spp_sackdelay_enable(trans->param_flags); |
7708610b FF |
2718 | } |
2719 | } | |
2720 | } | |
d808ad9a | 2721 | |
7708610b FF |
2722 | return 0; |
2723 | } | |
2724 | ||
1da177e4 LT |
2725 | /* 7.1.3 Initialization Parameters (SCTP_INITMSG) |
2726 | * | |
2727 | * Applications can specify protocol parameters for the default association | |
2728 | * initialization. The option name argument to setsockopt() and getsockopt() | |
2729 | * is SCTP_INITMSG. | |
2730 | * | |
2731 | * Setting initialization parameters is effective only on an unconnected | |
2732 | * socket (for UDP-style sockets only future associations are effected | |
2733 | * by the change). With TCP-style sockets, this option is inherited by | |
2734 | * sockets derived from a listener socket. | |
2735 | */ | |
b7058842 | 2736 | static int sctp_setsockopt_initmsg(struct sock *sk, char __user *optval, unsigned int optlen) |
1da177e4 LT |
2737 | { |
2738 | struct sctp_initmsg sinit; | |
2739 | struct sctp_sock *sp = sctp_sk(sk); | |
2740 | ||
2741 | if (optlen != sizeof(struct sctp_initmsg)) | |
2742 | return -EINVAL; | |
2743 | if (copy_from_user(&sinit, optval, optlen)) | |
2744 | return -EFAULT; | |
2745 | ||
2746 | if (sinit.sinit_num_ostreams) | |
d808ad9a | 2747 | sp->initmsg.sinit_num_ostreams = sinit.sinit_num_ostreams; |
1da177e4 | 2748 | if (sinit.sinit_max_instreams) |
d808ad9a | 2749 | sp->initmsg.sinit_max_instreams = sinit.sinit_max_instreams; |
1da177e4 | 2750 | if (sinit.sinit_max_attempts) |
d808ad9a | 2751 | sp->initmsg.sinit_max_attempts = sinit.sinit_max_attempts; |
1da177e4 | 2752 | if (sinit.sinit_max_init_timeo) |
d808ad9a | 2753 | sp->initmsg.sinit_max_init_timeo = sinit.sinit_max_init_timeo; |
1da177e4 LT |
2754 | |
2755 | return 0; | |
2756 | } | |
2757 | ||
2758 | /* | |
2759 | * 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM) | |
2760 | * | |
2761 | * Applications that wish to use the sendto() system call may wish to | |
2762 | * specify a default set of parameters that would normally be supplied | |
2763 | * through the inclusion of ancillary data. This socket option allows | |
2764 | * such an application to set the default sctp_sndrcvinfo structure. | |
2765 | * The application that wishes to use this socket option simply passes | |
2766 | * in to this call the sctp_sndrcvinfo structure defined in Section | |
2767 | * 5.2.2) The input parameters accepted by this call include | |
2768 | * sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context, | |
2769 | * sinfo_timetolive. The user must provide the sinfo_assoc_id field in | |
2770 | * to this call if the caller is using the UDP model. | |
2771 | */ | |
2772 | static int sctp_setsockopt_default_send_param(struct sock *sk, | |
b7058842 DM |
2773 | char __user *optval, |
2774 | unsigned int optlen) | |
1da177e4 | 2775 | { |
1da177e4 | 2776 | struct sctp_sock *sp = sctp_sk(sk); |
6b3fd5f3 GOV |
2777 | struct sctp_association *asoc; |
2778 | struct sctp_sndrcvinfo info; | |
1da177e4 | 2779 | |
6b3fd5f3 | 2780 | if (optlen != sizeof(info)) |
1da177e4 LT |
2781 | return -EINVAL; |
2782 | if (copy_from_user(&info, optval, optlen)) | |
2783 | return -EFAULT; | |
6b3fd5f3 GOV |
2784 | if (info.sinfo_flags & |
2785 | ~(SCTP_UNORDERED | SCTP_ADDR_OVER | | |
2786 | SCTP_ABORT | SCTP_EOF)) | |
2787 | return -EINVAL; | |
1da177e4 LT |
2788 | |
2789 | asoc = sctp_id2assoc(sk, info.sinfo_assoc_id); | |
2790 | if (!asoc && info.sinfo_assoc_id && sctp_style(sk, UDP)) | |
2791 | return -EINVAL; | |
1da177e4 LT |
2792 | if (asoc) { |
2793 | asoc->default_stream = info.sinfo_stream; | |
2794 | asoc->default_flags = info.sinfo_flags; | |
2795 | asoc->default_ppid = info.sinfo_ppid; | |
2796 | asoc->default_context = info.sinfo_context; | |
2797 | asoc->default_timetolive = info.sinfo_timetolive; | |
2798 | } else { | |
2799 | sp->default_stream = info.sinfo_stream; | |
2800 | sp->default_flags = info.sinfo_flags; | |
2801 | sp->default_ppid = info.sinfo_ppid; | |
2802 | sp->default_context = info.sinfo_context; | |
2803 | sp->default_timetolive = info.sinfo_timetolive; | |
2804 | } | |
2805 | ||
2806 | return 0; | |
2807 | } | |
2808 | ||
6b3fd5f3 GOV |
2809 | /* RFC6458, Section 8.1.31. Set/get Default Send Parameters |
2810 | * (SCTP_DEFAULT_SNDINFO) | |
2811 | */ | |
2812 | static int sctp_setsockopt_default_sndinfo(struct sock *sk, | |
2813 | char __user *optval, | |
2814 | unsigned int optlen) | |
2815 | { | |
2816 | struct sctp_sock *sp = sctp_sk(sk); | |
2817 | struct sctp_association *asoc; | |
2818 | struct sctp_sndinfo info; | |
2819 | ||
2820 | if (optlen != sizeof(info)) | |
2821 | return -EINVAL; | |
2822 | if (copy_from_user(&info, optval, optlen)) | |
2823 | return -EFAULT; | |
2824 | if (info.snd_flags & | |
2825 | ~(SCTP_UNORDERED | SCTP_ADDR_OVER | | |
2826 | SCTP_ABORT | SCTP_EOF)) | |
2827 | return -EINVAL; | |
2828 | ||
2829 | asoc = sctp_id2assoc(sk, info.snd_assoc_id); | |
2830 | if (!asoc && info.snd_assoc_id && sctp_style(sk, UDP)) | |
2831 | return -EINVAL; | |
2832 | if (asoc) { | |
2833 | asoc->default_stream = info.snd_sid; | |
2834 | asoc->default_flags = info.snd_flags; | |
2835 | asoc->default_ppid = info.snd_ppid; | |
2836 | asoc->default_context = info.snd_context; | |
2837 | } else { | |
2838 | sp->default_stream = info.snd_sid; | |
2839 | sp->default_flags = info.snd_flags; | |
2840 | sp->default_ppid = info.snd_ppid; | |
2841 | sp->default_context = info.snd_context; | |
2842 | } | |
2843 | ||
2844 | return 0; | |
2845 | } | |
2846 | ||
1da177e4 LT |
2847 | /* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR) |
2848 | * | |
2849 | * Requests that the local SCTP stack use the enclosed peer address as | |
2850 | * the association primary. The enclosed address must be one of the | |
2851 | * association peer's addresses. | |
2852 | */ | |
2853 | static int sctp_setsockopt_primary_addr(struct sock *sk, char __user *optval, | |
b7058842 | 2854 | unsigned int optlen) |
1da177e4 LT |
2855 | { |
2856 | struct sctp_prim prim; | |
2857 | struct sctp_transport *trans; | |
2858 | ||
2859 | if (optlen != sizeof(struct sctp_prim)) | |
2860 | return -EINVAL; | |
2861 | ||
2862 | if (copy_from_user(&prim, optval, sizeof(struct sctp_prim))) | |
2863 | return -EFAULT; | |
2864 | ||
2865 | trans = sctp_addr_id2transport(sk, &prim.ssp_addr, prim.ssp_assoc_id); | |
2866 | if (!trans) | |
2867 | return -EINVAL; | |
2868 | ||
2869 | sctp_assoc_set_primary(trans->asoc, trans); | |
2870 | ||
2871 | return 0; | |
2872 | } | |
2873 | ||
2874 | /* | |
2875 | * 7.1.5 SCTP_NODELAY | |
2876 | * | |
2877 | * Turn on/off any Nagle-like algorithm. This means that packets are | |
2878 | * generally sent as soon as possible and no unnecessary delays are | |
2879 | * introduced, at the cost of more packets in the network. Expects an | |
2880 | * integer boolean flag. | |
2881 | */ | |
2882 | static int sctp_setsockopt_nodelay(struct sock *sk, char __user *optval, | |
b7058842 | 2883 | unsigned int optlen) |
1da177e4 LT |
2884 | { |
2885 | int val; | |
2886 | ||
2887 | if (optlen < sizeof(int)) | |
2888 | return -EINVAL; | |
2889 | if (get_user(val, (int __user *)optval)) | |
2890 | return -EFAULT; | |
2891 | ||
2892 | sctp_sk(sk)->nodelay = (val == 0) ? 0 : 1; | |
2893 | return 0; | |
2894 | } | |
2895 | ||
2896 | /* | |
2897 | * | |
2898 | * 7.1.1 SCTP_RTOINFO | |
2899 | * | |
2900 | * The protocol parameters used to initialize and bound retransmission | |
2901 | * timeout (RTO) are tunable. sctp_rtoinfo structure is used to access | |
2902 | * and modify these parameters. | |
2903 | * All parameters are time values, in milliseconds. A value of 0, when | |
2904 | * modifying the parameters, indicates that the current value should not | |
2905 | * be changed. | |
2906 | * | |
2907 | */ | |
b7058842 DM |
2908 | static int sctp_setsockopt_rtoinfo(struct sock *sk, char __user *optval, unsigned int optlen) |
2909 | { | |
1da177e4 LT |
2910 | struct sctp_rtoinfo rtoinfo; |
2911 | struct sctp_association *asoc; | |
85f935d4 | 2912 | unsigned long rto_min, rto_max; |
2913 | struct sctp_sock *sp = sctp_sk(sk); | |
1da177e4 LT |
2914 | |
2915 | if (optlen != sizeof (struct sctp_rtoinfo)) | |
2916 | return -EINVAL; | |
2917 | ||
2918 | if (copy_from_user(&rtoinfo, optval, optlen)) | |
2919 | return -EFAULT; | |
2920 | ||
2921 | asoc = sctp_id2assoc(sk, rtoinfo.srto_assoc_id); | |
2922 | ||
2923 | /* Set the values to the specific association */ | |
2924 | if (!asoc && rtoinfo.srto_assoc_id && sctp_style(sk, UDP)) | |
2925 | return -EINVAL; | |
2926 | ||
85f935d4 | 2927 | rto_max = rtoinfo.srto_max; |
2928 | rto_min = rtoinfo.srto_min; | |
2929 | ||
2930 | if (rto_max) | |
2931 | rto_max = asoc ? msecs_to_jiffies(rto_max) : rto_max; | |
2932 | else | |
2933 | rto_max = asoc ? asoc->rto_max : sp->rtoinfo.srto_max; | |
2934 | ||
2935 | if (rto_min) | |
2936 | rto_min = asoc ? msecs_to_jiffies(rto_min) : rto_min; | |
2937 | else | |
2938 | rto_min = asoc ? asoc->rto_min : sp->rtoinfo.srto_min; | |
2939 | ||
2940 | if (rto_min > rto_max) | |
2941 | return -EINVAL; | |
2942 | ||
1da177e4 LT |
2943 | if (asoc) { |
2944 | if (rtoinfo.srto_initial != 0) | |
d808ad9a | 2945 | asoc->rto_initial = |
1da177e4 | 2946 | msecs_to_jiffies(rtoinfo.srto_initial); |
85f935d4 | 2947 | asoc->rto_max = rto_max; |
2948 | asoc->rto_min = rto_min; | |
1da177e4 LT |
2949 | } else { |
2950 | /* If there is no association or the association-id = 0 | |
2951 | * set the values to the endpoint. | |
2952 | */ | |
1da177e4 LT |
2953 | if (rtoinfo.srto_initial != 0) |
2954 | sp->rtoinfo.srto_initial = rtoinfo.srto_initial; | |
85f935d4 | 2955 | sp->rtoinfo.srto_max = rto_max; |
2956 | sp->rtoinfo.srto_min = rto_min; | |
1da177e4 LT |
2957 | } |
2958 | ||
2959 | return 0; | |
2960 | } | |
2961 | ||
2962 | /* | |
2963 | * | |
2964 | * 7.1.2 SCTP_ASSOCINFO | |
2965 | * | |
59c51591 | 2966 | * This option is used to tune the maximum retransmission attempts |
1da177e4 LT |
2967 | * of the association. |
2968 | * Returns an error if the new association retransmission value is | |
2969 | * greater than the sum of the retransmission value of the peer. | |
2970 | * See [SCTP] for more information. | |
2971 | * | |
2972 | */ | |
b7058842 | 2973 | static int sctp_setsockopt_associnfo(struct sock *sk, char __user *optval, unsigned int optlen) |
1da177e4 LT |
2974 | { |
2975 | ||
2976 | struct sctp_assocparams assocparams; | |
2977 | struct sctp_association *asoc; | |
2978 | ||
2979 | if (optlen != sizeof(struct sctp_assocparams)) | |
2980 | return -EINVAL; | |
2981 | if (copy_from_user(&assocparams, optval, optlen)) | |
2982 | return -EFAULT; | |
2983 | ||
2984 | asoc = sctp_id2assoc(sk, assocparams.sasoc_assoc_id); | |
2985 | ||
2986 | if (!asoc && assocparams.sasoc_assoc_id && sctp_style(sk, UDP)) | |
2987 | return -EINVAL; | |
2988 | ||
2989 | /* Set the values to the specific association */ | |
2990 | if (asoc) { | |
402d68c4 VY |
2991 | if (assocparams.sasoc_asocmaxrxt != 0) { |
2992 | __u32 path_sum = 0; | |
2993 | int paths = 0; | |
402d68c4 VY |
2994 | struct sctp_transport *peer_addr; |
2995 | ||
9dbc15f0 RD |
2996 | list_for_each_entry(peer_addr, &asoc->peer.transport_addr_list, |
2997 | transports) { | |
402d68c4 VY |
2998 | path_sum += peer_addr->pathmaxrxt; |
2999 | paths++; | |
3000 | } | |
3001 | ||
025dfdaf | 3002 | /* Only validate asocmaxrxt if we have more than |
402d68c4 VY |
3003 | * one path/transport. We do this because path |
3004 | * retransmissions are only counted when we have more | |
3005 | * then one path. | |
3006 | */ | |
3007 | if (paths > 1 && | |
3008 | assocparams.sasoc_asocmaxrxt > path_sum) | |
3009 | return -EINVAL; | |
3010 | ||
1da177e4 | 3011 | asoc->max_retrans = assocparams.sasoc_asocmaxrxt; |
402d68c4 VY |
3012 | } |
3013 | ||
52db882f DB |
3014 | if (assocparams.sasoc_cookie_life != 0) |
3015 | asoc->cookie_life = ms_to_ktime(assocparams.sasoc_cookie_life); | |
1da177e4 LT |
3016 | } else { |
3017 | /* Set the values to the endpoint */ | |
3018 | struct sctp_sock *sp = sctp_sk(sk); | |
3019 | ||
3020 | if (assocparams.sasoc_asocmaxrxt != 0) | |
3021 | sp->assocparams.sasoc_asocmaxrxt = | |
3022 | assocparams.sasoc_asocmaxrxt; | |
3023 | if (assocparams.sasoc_cookie_life != 0) | |
3024 | sp->assocparams.sasoc_cookie_life = | |
3025 | assocparams.sasoc_cookie_life; | |
3026 | } | |
3027 | return 0; | |
3028 | } | |
3029 | ||
3030 | /* | |
3031 | * 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR) | |
3032 | * | |
3033 | * This socket option is a boolean flag which turns on or off mapped V4 | |
3034 | * addresses. If this option is turned on and the socket is type | |
3035 | * PF_INET6, then IPv4 addresses will be mapped to V6 representation. | |
3036 | * If this option is turned off, then no mapping will be done of V4 | |
3037 | * addresses and a user will receive both PF_INET6 and PF_INET type | |
3038 | * addresses on the socket. | |
3039 | */ | |
b7058842 | 3040 | static int sctp_setsockopt_mappedv4(struct sock *sk, char __user *optval, unsigned int optlen) |
1da177e4 LT |
3041 | { |
3042 | int val; | |
3043 | struct sctp_sock *sp = sctp_sk(sk); | |
3044 | ||
3045 | if (optlen < sizeof(int)) | |
3046 | return -EINVAL; | |
3047 | if (get_user(val, (int __user *)optval)) | |
3048 | return -EFAULT; | |
3049 | if (val) | |
3050 | sp->v4mapped = 1; | |
3051 | else | |
3052 | sp->v4mapped = 0; | |
3053 | ||
3054 | return 0; | |
3055 | } | |
3056 | ||
3057 | /* | |
e89c2095 WY |
3058 | * 8.1.16. Get or Set the Maximum Fragmentation Size (SCTP_MAXSEG) |
3059 | * This option will get or set the maximum size to put in any outgoing | |
3060 | * SCTP DATA chunk. If a message is larger than this size it will be | |
1da177e4 LT |
3061 | * fragmented by SCTP into the specified size. Note that the underlying |
3062 | * SCTP implementation may fragment into smaller sized chunks when the | |
3063 | * PMTU of the underlying association is smaller than the value set by | |
e89c2095 WY |
3064 | * the user. The default value for this option is '0' which indicates |
3065 | * the user is NOT limiting fragmentation and only the PMTU will effect | |
3066 | * SCTP's choice of DATA chunk size. Note also that values set larger | |
3067 | * than the maximum size of an IP datagram will effectively let SCTP | |
3068 | * control fragmentation (i.e. the same as setting this option to 0). | |
3069 | * | |
3070 | * The following structure is used to access and modify this parameter: | |
3071 | * | |
3072 | * struct sctp_assoc_value { | |
3073 | * sctp_assoc_t assoc_id; | |
3074 | * uint32_t assoc_value; | |
3075 | * }; | |
3076 | * | |
3077 | * assoc_id: This parameter is ignored for one-to-one style sockets. | |
3078 | * For one-to-many style sockets this parameter indicates which | |
3079 | * association the user is performing an action upon. Note that if | |
3080 | * this field's value is zero then the endpoints default value is | |
3081 | * changed (effecting future associations only). | |
3082 | * assoc_value: This parameter specifies the maximum size in bytes. | |
1da177e4 | 3083 | */ |
b7058842 | 3084 | static int sctp_setsockopt_maxseg(struct sock *sk, char __user *optval, unsigned int optlen) |
1da177e4 | 3085 | { |
e89c2095 | 3086 | struct sctp_assoc_value params; |
1da177e4 | 3087 | struct sctp_association *asoc; |
1da177e4 LT |
3088 | struct sctp_sock *sp = sctp_sk(sk); |
3089 | int val; | |
3090 | ||
e89c2095 | 3091 | if (optlen == sizeof(int)) { |
94f65193 | 3092 | pr_warn_ratelimited(DEPRECATED |
f916ec96 | 3093 | "%s (pid %d) " |
94f65193 | 3094 | "Use of int in maxseg socket option.\n" |
f916ec96 NH |
3095 | "Use struct sctp_assoc_value instead\n", |
3096 | current->comm, task_pid_nr(current)); | |
e89c2095 WY |
3097 | if (copy_from_user(&val, optval, optlen)) |
3098 | return -EFAULT; | |
3099 | params.assoc_id = 0; | |
3100 | } else if (optlen == sizeof(struct sctp_assoc_value)) { | |
3101 | if (copy_from_user(¶ms, optval, optlen)) | |
3102 | return -EFAULT; | |
3103 | val = params.assoc_value; | |
3104 | } else | |
1da177e4 | 3105 | return -EINVAL; |
e89c2095 | 3106 | |
96a33998 | 3107 | if ((val != 0) && ((val < 8) || (val > SCTP_MAX_CHUNK_LEN))) |
1da177e4 | 3108 | return -EINVAL; |
1da177e4 | 3109 | |
e89c2095 WY |
3110 | asoc = sctp_id2assoc(sk, params.assoc_id); |
3111 | if (!asoc && params.assoc_id && sctp_style(sk, UDP)) | |
3112 | return -EINVAL; | |
3113 | ||
3114 | if (asoc) { | |
3115 | if (val == 0) { | |
3116 | val = asoc->pathmtu; | |
3117 | val -= sp->pf->af->net_header_len; | |
3118 | val -= sizeof(struct sctphdr) + | |
3119 | sizeof(struct sctp_data_chunk); | |
3120 | } | |
f68b2e05 VY |
3121 | asoc->user_frag = val; |
3122 | asoc->frag_point = sctp_frag_point(asoc, asoc->pathmtu); | |
e89c2095 WY |
3123 | } else { |
3124 | sp->user_frag = val; | |
1da177e4 LT |
3125 | } |
3126 | ||
3127 | return 0; | |
3128 | } | |
3129 | ||
3130 | ||
3131 | /* | |
3132 | * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR) | |
3133 | * | |
3134 | * Requests that the peer mark the enclosed address as the association | |
3135 | * primary. The enclosed address must be one of the association's | |
3136 | * locally bound addresses. The following structure is used to make a | |
3137 | * set primary request: | |
3138 | */ | |
3139 | static int sctp_setsockopt_peer_primary_addr(struct sock *sk, char __user *optval, | |
b7058842 | 3140 | unsigned int optlen) |
1da177e4 | 3141 | { |
e1fc3b14 | 3142 | struct net *net = sock_net(sk); |
1da177e4 | 3143 | struct sctp_sock *sp; |
1da177e4 LT |
3144 | struct sctp_association *asoc = NULL; |
3145 | struct sctp_setpeerprim prim; | |
3146 | struct sctp_chunk *chunk; | |
40a01039 | 3147 | struct sctp_af *af; |
1da177e4 LT |
3148 | int err; |
3149 | ||
3150 | sp = sctp_sk(sk); | |
1da177e4 | 3151 | |
e1fc3b14 | 3152 | if (!net->sctp.addip_enable) |
1da177e4 LT |
3153 | return -EPERM; |
3154 | ||
3155 | if (optlen != sizeof(struct sctp_setpeerprim)) | |
3156 | return -EINVAL; | |
3157 | ||
3158 | if (copy_from_user(&prim, optval, optlen)) | |
3159 | return -EFAULT; | |
3160 | ||
3161 | asoc = sctp_id2assoc(sk, prim.sspp_assoc_id); | |
d808ad9a | 3162 | if (!asoc) |
1da177e4 LT |
3163 | return -EINVAL; |
3164 | ||
3165 | if (!asoc->peer.asconf_capable) | |
3166 | return -EPERM; | |
3167 | ||
3168 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_SET_PRIMARY) | |
3169 | return -EPERM; | |
3170 | ||
3171 | if (!sctp_state(asoc, ESTABLISHED)) | |
3172 | return -ENOTCONN; | |
3173 | ||
40a01039 WY |
3174 | af = sctp_get_af_specific(prim.sspp_addr.ss_family); |
3175 | if (!af) | |
3176 | return -EINVAL; | |
3177 | ||
3178 | if (!af->addr_valid((union sctp_addr *)&prim.sspp_addr, sp, NULL)) | |
3179 | return -EADDRNOTAVAIL; | |
3180 | ||
1da177e4 LT |
3181 | if (!sctp_assoc_lookup_laddr(asoc, (union sctp_addr *)&prim.sspp_addr)) |
3182 | return -EADDRNOTAVAIL; | |
3183 | ||
3184 | /* Create an ASCONF chunk with SET_PRIMARY parameter */ | |
3185 | chunk = sctp_make_asconf_set_prim(asoc, | |
3186 | (union sctp_addr *)&prim.sspp_addr); | |
3187 | if (!chunk) | |
3188 | return -ENOMEM; | |
3189 | ||
3190 | err = sctp_send_asconf(asoc, chunk); | |
3191 | ||
bb33381d | 3192 | pr_debug("%s: we set peer primary addr primitively\n", __func__); |
1da177e4 LT |
3193 | |
3194 | return err; | |
3195 | } | |
3196 | ||
0f3fffd8 | 3197 | static int sctp_setsockopt_adaptation_layer(struct sock *sk, char __user *optval, |
b7058842 | 3198 | unsigned int optlen) |
1da177e4 | 3199 | { |
0f3fffd8 | 3200 | struct sctp_setadaptation adaptation; |
1da177e4 | 3201 | |
0f3fffd8 | 3202 | if (optlen != sizeof(struct sctp_setadaptation)) |
1da177e4 | 3203 | return -EINVAL; |
0f3fffd8 | 3204 | if (copy_from_user(&adaptation, optval, optlen)) |
1da177e4 LT |
3205 | return -EFAULT; |
3206 | ||
0f3fffd8 | 3207 | sctp_sk(sk)->adaptation_ind = adaptation.ssb_adaptation_ind; |
1da177e4 LT |
3208 | |
3209 | return 0; | |
3210 | } | |
3211 | ||
6ab792f5 ISJ |
3212 | /* |
3213 | * 7.1.29. Set or Get the default context (SCTP_CONTEXT) | |
3214 | * | |
3215 | * The context field in the sctp_sndrcvinfo structure is normally only | |
3216 | * used when a failed message is retrieved holding the value that was | |
3217 | * sent down on the actual send call. This option allows the setting of | |
3218 | * a default context on an association basis that will be received on | |
3219 | * reading messages from the peer. This is especially helpful in the | |
3220 | * one-2-many model for an application to keep some reference to an | |
3221 | * internal state machine that is processing messages on the | |
3222 | * association. Note that the setting of this value only effects | |
3223 | * received messages from the peer and does not effect the value that is | |
3224 | * saved with outbound messages. | |
3225 | */ | |
3226 | static int sctp_setsockopt_context(struct sock *sk, char __user *optval, | |
b7058842 | 3227 | unsigned int optlen) |
6ab792f5 ISJ |
3228 | { |
3229 | struct sctp_assoc_value params; | |
3230 | struct sctp_sock *sp; | |
3231 | struct sctp_association *asoc; | |
3232 | ||
3233 | if (optlen != sizeof(struct sctp_assoc_value)) | |
3234 | return -EINVAL; | |
3235 | if (copy_from_user(¶ms, optval, optlen)) | |
3236 | return -EFAULT; | |
3237 | ||
3238 | sp = sctp_sk(sk); | |
3239 | ||
3240 | if (params.assoc_id != 0) { | |
3241 | asoc = sctp_id2assoc(sk, params.assoc_id); | |
3242 | if (!asoc) | |
3243 | return -EINVAL; | |
3244 | asoc->default_rcv_context = params.assoc_value; | |
3245 | } else { | |
3246 | sp->default_rcv_context = params.assoc_value; | |
3247 | } | |
3248 | ||
3249 | return 0; | |
3250 | } | |
3251 | ||
b6e1331f VY |
3252 | /* |
3253 | * 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE) | |
3254 | * | |
3255 | * This options will at a minimum specify if the implementation is doing | |
3256 | * fragmented interleave. Fragmented interleave, for a one to many | |
3257 | * socket, is when subsequent calls to receive a message may return | |
3258 | * parts of messages from different associations. Some implementations | |
3259 | * may allow you to turn this value on or off. If so, when turned off, | |
3260 | * no fragment interleave will occur (which will cause a head of line | |
3261 | * blocking amongst multiple associations sharing the same one to many | |
3262 | * socket). When this option is turned on, then each receive call may | |
3263 | * come from a different association (thus the user must receive data | |
3264 | * with the extended calls (e.g. sctp_recvmsg) to keep track of which | |
3265 | * association each receive belongs to. | |
3266 | * | |
3267 | * This option takes a boolean value. A non-zero value indicates that | |
3268 | * fragmented interleave is on. A value of zero indicates that | |
3269 | * fragmented interleave is off. | |
3270 | * | |
3271 | * Note that it is important that an implementation that allows this | |
3272 | * option to be turned on, have it off by default. Otherwise an unaware | |
3273 | * application using the one to many model may become confused and act | |
3274 | * incorrectly. | |
3275 | */ | |
3276 | static int sctp_setsockopt_fragment_interleave(struct sock *sk, | |
3277 | char __user *optval, | |
b7058842 | 3278 | unsigned int optlen) |
b6e1331f VY |
3279 | { |
3280 | int val; | |
3281 | ||
3282 | if (optlen != sizeof(int)) | |
3283 | return -EINVAL; | |
3284 | if (get_user(val, (int __user *)optval)) | |
3285 | return -EFAULT; | |
3286 | ||
3287 | sctp_sk(sk)->frag_interleave = (val == 0) ? 0 : 1; | |
3288 | ||
3289 | return 0; | |
3290 | } | |
3291 | ||
d49d91d7 | 3292 | /* |
8510b937 | 3293 | * 8.1.21. Set or Get the SCTP Partial Delivery Point |
d49d91d7 | 3294 | * (SCTP_PARTIAL_DELIVERY_POINT) |
8510b937 | 3295 | * |
d49d91d7 VY |
3296 | * This option will set or get the SCTP partial delivery point. This |
3297 | * point is the size of a message where the partial delivery API will be | |
3298 | * invoked to help free up rwnd space for the peer. Setting this to a | |
8510b937 | 3299 | * lower value will cause partial deliveries to happen more often. The |
d49d91d7 | 3300 | * calls argument is an integer that sets or gets the partial delivery |
8510b937 WY |
3301 | * point. Note also that the call will fail if the user attempts to set |
3302 | * this value larger than the socket receive buffer size. | |
3303 | * | |
3304 | * Note that any single message having a length smaller than or equal to | |
3305 | * the SCTP partial delivery point will be delivered in one single read | |
3306 | * call as long as the user provided buffer is large enough to hold the | |
3307 | * message. | |
d49d91d7 VY |
3308 | */ |
3309 | static int sctp_setsockopt_partial_delivery_point(struct sock *sk, | |
3310 | char __user *optval, | |
b7058842 | 3311 | unsigned int optlen) |
d49d91d7 VY |
3312 | { |
3313 | u32 val; | |
3314 | ||
3315 | if (optlen != sizeof(u32)) | |
3316 | return -EINVAL; | |
3317 | if (get_user(val, (int __user *)optval)) | |
3318 | return -EFAULT; | |
3319 | ||
8510b937 WY |
3320 | /* Note: We double the receive buffer from what the user sets |
3321 | * it to be, also initial rwnd is based on rcvbuf/2. | |
3322 | */ | |
3323 | if (val > (sk->sk_rcvbuf >> 1)) | |
3324 | return -EINVAL; | |
3325 | ||
d49d91d7 VY |
3326 | sctp_sk(sk)->pd_point = val; |
3327 | ||
3328 | return 0; /* is this the right error code? */ | |
3329 | } | |
3330 | ||
70331571 VY |
3331 | /* |
3332 | * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST) | |
3333 | * | |
3334 | * This option will allow a user to change the maximum burst of packets | |
3335 | * that can be emitted by this association. Note that the default value | |
3336 | * is 4, and some implementations may restrict this setting so that it | |
3337 | * can only be lowered. | |
3338 | * | |
3339 | * NOTE: This text doesn't seem right. Do this on a socket basis with | |
3340 | * future associations inheriting the socket value. | |
3341 | */ | |
3342 | static int sctp_setsockopt_maxburst(struct sock *sk, | |
3343 | char __user *optval, | |
b7058842 | 3344 | unsigned int optlen) |
70331571 | 3345 | { |
219b99a9 NH |
3346 | struct sctp_assoc_value params; |
3347 | struct sctp_sock *sp; | |
3348 | struct sctp_association *asoc; | |
70331571 | 3349 | int val; |
219b99a9 | 3350 | int assoc_id = 0; |
70331571 | 3351 | |
219b99a9 | 3352 | if (optlen == sizeof(int)) { |
94f65193 | 3353 | pr_warn_ratelimited(DEPRECATED |
f916ec96 | 3354 | "%s (pid %d) " |
94f65193 | 3355 | "Use of int in max_burst socket option deprecated.\n" |
f916ec96 NH |
3356 | "Use struct sctp_assoc_value instead\n", |
3357 | current->comm, task_pid_nr(current)); | |
219b99a9 NH |
3358 | if (copy_from_user(&val, optval, optlen)) |
3359 | return -EFAULT; | |
3360 | } else if (optlen == sizeof(struct sctp_assoc_value)) { | |
3361 | if (copy_from_user(¶ms, optval, optlen)) | |
3362 | return -EFAULT; | |
3363 | val = params.assoc_value; | |
3364 | assoc_id = params.assoc_id; | |
3365 | } else | |
70331571 VY |
3366 | return -EINVAL; |
3367 | ||
219b99a9 NH |
3368 | sp = sctp_sk(sk); |
3369 | ||
3370 | if (assoc_id != 0) { | |
3371 | asoc = sctp_id2assoc(sk, assoc_id); | |
3372 | if (!asoc) | |
3373 | return -EINVAL; | |
3374 | asoc->max_burst = val; | |
3375 | } else | |
3376 | sp->max_burst = val; | |
70331571 VY |
3377 | |
3378 | return 0; | |
3379 | } | |
3380 | ||
65b07e5d VY |
3381 | /* |
3382 | * 7.1.18. Add a chunk that must be authenticated (SCTP_AUTH_CHUNK) | |
3383 | * | |
3384 | * This set option adds a chunk type that the user is requesting to be | |
3385 | * received only in an authenticated way. Changes to the list of chunks | |
3386 | * will only effect future associations on the socket. | |
3387 | */ | |
3388 | static int sctp_setsockopt_auth_chunk(struct sock *sk, | |
b7058842 DM |
3389 | char __user *optval, |
3390 | unsigned int optlen) | |
65b07e5d | 3391 | { |
b14878cc | 3392 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d VY |
3393 | struct sctp_authchunk val; |
3394 | ||
b14878cc | 3395 | if (!ep->auth_enable) |
5e739d17 VY |
3396 | return -EACCES; |
3397 | ||
65b07e5d VY |
3398 | if (optlen != sizeof(struct sctp_authchunk)) |
3399 | return -EINVAL; | |
3400 | if (copy_from_user(&val, optval, optlen)) | |
3401 | return -EFAULT; | |
3402 | ||
3403 | switch (val.sauth_chunk) { | |
7fd71b1e JP |
3404 | case SCTP_CID_INIT: |
3405 | case SCTP_CID_INIT_ACK: | |
3406 | case SCTP_CID_SHUTDOWN_COMPLETE: | |
3407 | case SCTP_CID_AUTH: | |
3408 | return -EINVAL; | |
65b07e5d VY |
3409 | } |
3410 | ||
3411 | /* add this chunk id to the endpoint */ | |
b14878cc | 3412 | return sctp_auth_ep_add_chunkid(ep, val.sauth_chunk); |
65b07e5d VY |
3413 | } |
3414 | ||
3415 | /* | |
3416 | * 7.1.19. Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT) | |
3417 | * | |
3418 | * This option gets or sets the list of HMAC algorithms that the local | |
3419 | * endpoint requires the peer to use. | |
3420 | */ | |
3421 | static int sctp_setsockopt_hmac_ident(struct sock *sk, | |
b7058842 DM |
3422 | char __user *optval, |
3423 | unsigned int optlen) | |
65b07e5d | 3424 | { |
b14878cc | 3425 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d | 3426 | struct sctp_hmacalgo *hmacs; |
d9724055 | 3427 | u32 idents; |
65b07e5d VY |
3428 | int err; |
3429 | ||
b14878cc | 3430 | if (!ep->auth_enable) |
5e739d17 VY |
3431 | return -EACCES; |
3432 | ||
65b07e5d VY |
3433 | if (optlen < sizeof(struct sctp_hmacalgo)) |
3434 | return -EINVAL; | |
3435 | ||
cb3f837b | 3436 | hmacs = memdup_user(optval, optlen); |
934253a7 SW |
3437 | if (IS_ERR(hmacs)) |
3438 | return PTR_ERR(hmacs); | |
65b07e5d | 3439 | |
d9724055 VY |
3440 | idents = hmacs->shmac_num_idents; |
3441 | if (idents == 0 || idents > SCTP_AUTH_NUM_HMACS || | |
3442 | (idents * sizeof(u16)) > (optlen - sizeof(struct sctp_hmacalgo))) { | |
65b07e5d VY |
3443 | err = -EINVAL; |
3444 | goto out; | |
3445 | } | |
3446 | ||
b14878cc | 3447 | err = sctp_auth_ep_set_hmacs(ep, hmacs); |
65b07e5d VY |
3448 | out: |
3449 | kfree(hmacs); | |
3450 | return err; | |
3451 | } | |
3452 | ||
3453 | /* | |
3454 | * 7.1.20. Set a shared key (SCTP_AUTH_KEY) | |
3455 | * | |
3456 | * This option will set a shared secret key which is used to build an | |
3457 | * association shared key. | |
3458 | */ | |
3459 | static int sctp_setsockopt_auth_key(struct sock *sk, | |
3460 | char __user *optval, | |
b7058842 | 3461 | unsigned int optlen) |
65b07e5d | 3462 | { |
b14878cc | 3463 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d VY |
3464 | struct sctp_authkey *authkey; |
3465 | struct sctp_association *asoc; | |
3466 | int ret; | |
3467 | ||
b14878cc | 3468 | if (!ep->auth_enable) |
5e739d17 VY |
3469 | return -EACCES; |
3470 | ||
65b07e5d VY |
3471 | if (optlen <= sizeof(struct sctp_authkey)) |
3472 | return -EINVAL; | |
3473 | ||
cb3f837b | 3474 | authkey = memdup_user(optval, optlen); |
934253a7 SW |
3475 | if (IS_ERR(authkey)) |
3476 | return PTR_ERR(authkey); | |
65b07e5d | 3477 | |
328fc47e | 3478 | if (authkey->sca_keylength > optlen - sizeof(struct sctp_authkey)) { |
30c2235c VY |
3479 | ret = -EINVAL; |
3480 | goto out; | |
3481 | } | |
3482 | ||
65b07e5d VY |
3483 | asoc = sctp_id2assoc(sk, authkey->sca_assoc_id); |
3484 | if (!asoc && authkey->sca_assoc_id && sctp_style(sk, UDP)) { | |
3485 | ret = -EINVAL; | |
3486 | goto out; | |
3487 | } | |
3488 | ||
b14878cc | 3489 | ret = sctp_auth_set_key(ep, asoc, authkey); |
65b07e5d | 3490 | out: |
6ba542a2 | 3491 | kzfree(authkey); |
65b07e5d VY |
3492 | return ret; |
3493 | } | |
3494 | ||
3495 | /* | |
3496 | * 7.1.21. Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY) | |
3497 | * | |
3498 | * This option will get or set the active shared key to be used to build | |
3499 | * the association shared key. | |
3500 | */ | |
3501 | static int sctp_setsockopt_active_key(struct sock *sk, | |
b7058842 DM |
3502 | char __user *optval, |
3503 | unsigned int optlen) | |
65b07e5d | 3504 | { |
b14878cc | 3505 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d VY |
3506 | struct sctp_authkeyid val; |
3507 | struct sctp_association *asoc; | |
3508 | ||
b14878cc | 3509 | if (!ep->auth_enable) |
5e739d17 VY |
3510 | return -EACCES; |
3511 | ||
65b07e5d VY |
3512 | if (optlen != sizeof(struct sctp_authkeyid)) |
3513 | return -EINVAL; | |
3514 | if (copy_from_user(&val, optval, optlen)) | |
3515 | return -EFAULT; | |
3516 | ||
3517 | asoc = sctp_id2assoc(sk, val.scact_assoc_id); | |
3518 | if (!asoc && val.scact_assoc_id && sctp_style(sk, UDP)) | |
3519 | return -EINVAL; | |
3520 | ||
b14878cc | 3521 | return sctp_auth_set_active_key(ep, asoc, val.scact_keynumber); |
65b07e5d VY |
3522 | } |
3523 | ||
3524 | /* | |
3525 | * 7.1.22. Delete a shared key (SCTP_AUTH_DELETE_KEY) | |
3526 | * | |
3527 | * This set option will delete a shared secret key from use. | |
3528 | */ | |
3529 | static int sctp_setsockopt_del_key(struct sock *sk, | |
b7058842 DM |
3530 | char __user *optval, |
3531 | unsigned int optlen) | |
65b07e5d | 3532 | { |
b14878cc | 3533 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d VY |
3534 | struct sctp_authkeyid val; |
3535 | struct sctp_association *asoc; | |
3536 | ||
b14878cc | 3537 | if (!ep->auth_enable) |
5e739d17 VY |
3538 | return -EACCES; |
3539 | ||
65b07e5d VY |
3540 | if (optlen != sizeof(struct sctp_authkeyid)) |
3541 | return -EINVAL; | |
3542 | if (copy_from_user(&val, optval, optlen)) | |
3543 | return -EFAULT; | |
3544 | ||
3545 | asoc = sctp_id2assoc(sk, val.scact_assoc_id); | |
3546 | if (!asoc && val.scact_assoc_id && sctp_style(sk, UDP)) | |
3547 | return -EINVAL; | |
3548 | ||
b14878cc | 3549 | return sctp_auth_del_key_id(ep, asoc, val.scact_keynumber); |
65b07e5d VY |
3550 | |
3551 | } | |
3552 | ||
7dc04d71 MH |
3553 | /* |
3554 | * 8.1.23 SCTP_AUTO_ASCONF | |
3555 | * | |
3556 | * This option will enable or disable the use of the automatic generation of | |
3557 | * ASCONF chunks to add and delete addresses to an existing association. Note | |
3558 | * that this option has two caveats namely: a) it only affects sockets that | |
3559 | * are bound to all addresses available to the SCTP stack, and b) the system | |
3560 | * administrator may have an overriding control that turns the ASCONF feature | |
3561 | * off no matter what setting the socket option may have. | |
3562 | * This option expects an integer boolean flag, where a non-zero value turns on | |
3563 | * the option, and a zero value turns off the option. | |
3564 | * Note. In this implementation, socket operation overrides default parameter | |
3565 | * being set by sysctl as well as FreeBSD implementation | |
3566 | */ | |
3567 | static int sctp_setsockopt_auto_asconf(struct sock *sk, char __user *optval, | |
3568 | unsigned int optlen) | |
3569 | { | |
3570 | int val; | |
3571 | struct sctp_sock *sp = sctp_sk(sk); | |
3572 | ||
3573 | if (optlen < sizeof(int)) | |
3574 | return -EINVAL; | |
3575 | if (get_user(val, (int __user *)optval)) | |
3576 | return -EFAULT; | |
3577 | if (!sctp_is_ep_boundall(sk) && val) | |
3578 | return -EINVAL; | |
3579 | if ((val && sp->do_auto_asconf) || (!val && !sp->do_auto_asconf)) | |
3580 | return 0; | |
3581 | ||
2d45a02d | 3582 | spin_lock_bh(&sock_net(sk)->sctp.addr_wq_lock); |
7dc04d71 MH |
3583 | if (val == 0 && sp->do_auto_asconf) { |
3584 | list_del(&sp->auto_asconf_list); | |
3585 | sp->do_auto_asconf = 0; | |
3586 | } else if (val && !sp->do_auto_asconf) { | |
3587 | list_add_tail(&sp->auto_asconf_list, | |
4db67e80 | 3588 | &sock_net(sk)->sctp.auto_asconf_splist); |
7dc04d71 MH |
3589 | sp->do_auto_asconf = 1; |
3590 | } | |
2d45a02d | 3591 | spin_unlock_bh(&sock_net(sk)->sctp.addr_wq_lock); |
7dc04d71 MH |
3592 | return 0; |
3593 | } | |
3594 | ||
5aa93bcf NH |
3595 | /* |
3596 | * SCTP_PEER_ADDR_THLDS | |
3597 | * | |
3598 | * This option allows us to alter the partially failed threshold for one or all | |
3599 | * transports in an association. See Section 6.1 of: | |
3600 | * http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txt | |
3601 | */ | |
3602 | static int sctp_setsockopt_paddr_thresholds(struct sock *sk, | |
3603 | char __user *optval, | |
3604 | unsigned int optlen) | |
3605 | { | |
3606 | struct sctp_paddrthlds val; | |
3607 | struct sctp_transport *trans; | |
3608 | struct sctp_association *asoc; | |
3609 | ||
3610 | if (optlen < sizeof(struct sctp_paddrthlds)) | |
3611 | return -EINVAL; | |
3612 | if (copy_from_user(&val, (struct sctp_paddrthlds __user *)optval, | |
3613 | sizeof(struct sctp_paddrthlds))) | |
3614 | return -EFAULT; | |
3615 | ||
3616 | ||
3617 | if (sctp_is_any(sk, (const union sctp_addr *)&val.spt_address)) { | |
3618 | asoc = sctp_id2assoc(sk, val.spt_assoc_id); | |
3619 | if (!asoc) | |
3620 | return -ENOENT; | |
3621 | list_for_each_entry(trans, &asoc->peer.transport_addr_list, | |
3622 | transports) { | |
3623 | if (val.spt_pathmaxrxt) | |
3624 | trans->pathmaxrxt = val.spt_pathmaxrxt; | |
3625 | trans->pf_retrans = val.spt_pathpfthld; | |
3626 | } | |
3627 | ||
3628 | if (val.spt_pathmaxrxt) | |
3629 | asoc->pathmaxrxt = val.spt_pathmaxrxt; | |
3630 | asoc->pf_retrans = val.spt_pathpfthld; | |
3631 | } else { | |
3632 | trans = sctp_addr_id2transport(sk, &val.spt_address, | |
3633 | val.spt_assoc_id); | |
3634 | if (!trans) | |
3635 | return -ENOENT; | |
3636 | ||
3637 | if (val.spt_pathmaxrxt) | |
3638 | trans->pathmaxrxt = val.spt_pathmaxrxt; | |
3639 | trans->pf_retrans = val.spt_pathpfthld; | |
3640 | } | |
3641 | ||
3642 | return 0; | |
3643 | } | |
3644 | ||
0d3a421d GOV |
3645 | static int sctp_setsockopt_recvrcvinfo(struct sock *sk, |
3646 | char __user *optval, | |
3647 | unsigned int optlen) | |
3648 | { | |
3649 | int val; | |
3650 | ||
3651 | if (optlen < sizeof(int)) | |
3652 | return -EINVAL; | |
3653 | if (get_user(val, (int __user *) optval)) | |
3654 | return -EFAULT; | |
3655 | ||
3656 | sctp_sk(sk)->recvrcvinfo = (val == 0) ? 0 : 1; | |
3657 | ||
3658 | return 0; | |
3659 | } | |
3660 | ||
2347c80f GOV |
3661 | static int sctp_setsockopt_recvnxtinfo(struct sock *sk, |
3662 | char __user *optval, | |
3663 | unsigned int optlen) | |
3664 | { | |
3665 | int val; | |
3666 | ||
3667 | if (optlen < sizeof(int)) | |
3668 | return -EINVAL; | |
3669 | if (get_user(val, (int __user *) optval)) | |
3670 | return -EFAULT; | |
3671 | ||
3672 | sctp_sk(sk)->recvnxtinfo = (val == 0) ? 0 : 1; | |
3673 | ||
3674 | return 0; | |
3675 | } | |
3676 | ||
28aa4c26 XL |
3677 | static int sctp_setsockopt_pr_supported(struct sock *sk, |
3678 | char __user *optval, | |
3679 | unsigned int optlen) | |
3680 | { | |
3681 | struct sctp_assoc_value params; | |
3682 | struct sctp_association *asoc; | |
3683 | int retval = -EINVAL; | |
3684 | ||
3685 | if (optlen != sizeof(params)) | |
3686 | goto out; | |
3687 | ||
3688 | if (copy_from_user(¶ms, optval, optlen)) { | |
3689 | retval = -EFAULT; | |
3690 | goto out; | |
3691 | } | |
3692 | ||
3693 | asoc = sctp_id2assoc(sk, params.assoc_id); | |
3694 | if (asoc) { | |
3695 | asoc->prsctp_enable = !!params.assoc_value; | |
3696 | } else if (!params.assoc_id) { | |
3697 | struct sctp_sock *sp = sctp_sk(sk); | |
3698 | ||
3699 | sp->ep->prsctp_enable = !!params.assoc_value; | |
3700 | } else { | |
3701 | goto out; | |
3702 | } | |
3703 | ||
3704 | retval = 0; | |
3705 | ||
3706 | out: | |
3707 | return retval; | |
3708 | } | |
3709 | ||
f959fb44 XL |
3710 | static int sctp_setsockopt_default_prinfo(struct sock *sk, |
3711 | char __user *optval, | |
3712 | unsigned int optlen) | |
3713 | { | |
3714 | struct sctp_default_prinfo info; | |
3715 | struct sctp_association *asoc; | |
3716 | int retval = -EINVAL; | |
3717 | ||
3718 | if (optlen != sizeof(info)) | |
3719 | goto out; | |
3720 | ||
3721 | if (copy_from_user(&info, optval, sizeof(info))) { | |
3722 | retval = -EFAULT; | |
3723 | goto out; | |
3724 | } | |
3725 | ||
3726 | if (info.pr_policy & ~SCTP_PR_SCTP_MASK) | |
3727 | goto out; | |
3728 | ||
3729 | if (info.pr_policy == SCTP_PR_SCTP_NONE) | |
3730 | info.pr_value = 0; | |
3731 | ||
3732 | asoc = sctp_id2assoc(sk, info.pr_assoc_id); | |
3733 | if (asoc) { | |
3734 | SCTP_PR_SET_POLICY(asoc->default_flags, info.pr_policy); | |
3735 | asoc->default_timetolive = info.pr_value; | |
3736 | } else if (!info.pr_assoc_id) { | |
3737 | struct sctp_sock *sp = sctp_sk(sk); | |
3738 | ||
3739 | SCTP_PR_SET_POLICY(sp->default_flags, info.pr_policy); | |
3740 | sp->default_timetolive = info.pr_value; | |
3741 | } else { | |
3742 | goto out; | |
3743 | } | |
3744 | ||
3745 | retval = 0; | |
3746 | ||
3747 | out: | |
3748 | return retval; | |
3749 | } | |
3750 | ||
1da177e4 LT |
3751 | /* API 6.2 setsockopt(), getsockopt() |
3752 | * | |
3753 | * Applications use setsockopt() and getsockopt() to set or retrieve | |
3754 | * socket options. Socket options are used to change the default | |
3755 | * behavior of sockets calls. They are described in Section 7. | |
3756 | * | |
3757 | * The syntax is: | |
3758 | * | |
3759 | * ret = getsockopt(int sd, int level, int optname, void __user *optval, | |
3760 | * int __user *optlen); | |
3761 | * ret = setsockopt(int sd, int level, int optname, const void __user *optval, | |
3762 | * int optlen); | |
3763 | * | |
3764 | * sd - the socket descript. | |
3765 | * level - set to IPPROTO_SCTP for all SCTP options. | |
3766 | * optname - the option name. | |
3767 | * optval - the buffer to store the value of the option. | |
3768 | * optlen - the size of the buffer. | |
3769 | */ | |
dda91928 DB |
3770 | static int sctp_setsockopt(struct sock *sk, int level, int optname, |
3771 | char __user *optval, unsigned int optlen) | |
1da177e4 LT |
3772 | { |
3773 | int retval = 0; | |
3774 | ||
bb33381d | 3775 | pr_debug("%s: sk:%p, optname:%d\n", __func__, sk, optname); |
1da177e4 LT |
3776 | |
3777 | /* I can hardly begin to describe how wrong this is. This is | |
3778 | * so broken as to be worse than useless. The API draft | |
3779 | * REALLY is NOT helpful here... I am not convinced that the | |
3780 | * semantics of setsockopt() with a level OTHER THAN SOL_SCTP | |
3781 | * are at all well-founded. | |
3782 | */ | |
3783 | if (level != SOL_SCTP) { | |
3784 | struct sctp_af *af = sctp_sk(sk)->pf->af; | |
3785 | retval = af->setsockopt(sk, level, optname, optval, optlen); | |
3786 | goto out_nounlock; | |
3787 | } | |
3788 | ||
048ed4b6 | 3789 | lock_sock(sk); |
1da177e4 LT |
3790 | |
3791 | switch (optname) { | |
3792 | case SCTP_SOCKOPT_BINDX_ADD: | |
3793 | /* 'optlen' is the size of the addresses buffer. */ | |
3794 | retval = sctp_setsockopt_bindx(sk, (struct sockaddr __user *)optval, | |
3795 | optlen, SCTP_BINDX_ADD_ADDR); | |
3796 | break; | |
3797 | ||
3798 | case SCTP_SOCKOPT_BINDX_REM: | |
3799 | /* 'optlen' is the size of the addresses buffer. */ | |
3800 | retval = sctp_setsockopt_bindx(sk, (struct sockaddr __user *)optval, | |
3801 | optlen, SCTP_BINDX_REM_ADDR); | |
3802 | break; | |
3803 | ||
88a0a948 VY |
3804 | case SCTP_SOCKOPT_CONNECTX_OLD: |
3805 | /* 'optlen' is the size of the addresses buffer. */ | |
3806 | retval = sctp_setsockopt_connectx_old(sk, | |
3807 | (struct sockaddr __user *)optval, | |
3808 | optlen); | |
3809 | break; | |
3810 | ||
3f7a87d2 FF |
3811 | case SCTP_SOCKOPT_CONNECTX: |
3812 | /* 'optlen' is the size of the addresses buffer. */ | |
88a0a948 VY |
3813 | retval = sctp_setsockopt_connectx(sk, |
3814 | (struct sockaddr __user *)optval, | |
3815 | optlen); | |
3f7a87d2 FF |
3816 | break; |
3817 | ||
1da177e4 LT |
3818 | case SCTP_DISABLE_FRAGMENTS: |
3819 | retval = sctp_setsockopt_disable_fragments(sk, optval, optlen); | |
3820 | break; | |
3821 | ||
3822 | case SCTP_EVENTS: | |
3823 | retval = sctp_setsockopt_events(sk, optval, optlen); | |
3824 | break; | |
3825 | ||
3826 | case SCTP_AUTOCLOSE: | |
3827 | retval = sctp_setsockopt_autoclose(sk, optval, optlen); | |
3828 | break; | |
3829 | ||
3830 | case SCTP_PEER_ADDR_PARAMS: | |
3831 | retval = sctp_setsockopt_peer_addr_params(sk, optval, optlen); | |
3832 | break; | |
3833 | ||
4580ccc0 | 3834 | case SCTP_DELAYED_SACK: |
d364d927 | 3835 | retval = sctp_setsockopt_delayed_ack(sk, optval, optlen); |
7708610b | 3836 | break; |
d49d91d7 VY |
3837 | case SCTP_PARTIAL_DELIVERY_POINT: |
3838 | retval = sctp_setsockopt_partial_delivery_point(sk, optval, optlen); | |
3839 | break; | |
7708610b | 3840 | |
1da177e4 LT |
3841 | case SCTP_INITMSG: |
3842 | retval = sctp_setsockopt_initmsg(sk, optval, optlen); | |
3843 | break; | |
3844 | case SCTP_DEFAULT_SEND_PARAM: | |
3845 | retval = sctp_setsockopt_default_send_param(sk, optval, | |
3846 | optlen); | |
3847 | break; | |
6b3fd5f3 GOV |
3848 | case SCTP_DEFAULT_SNDINFO: |
3849 | retval = sctp_setsockopt_default_sndinfo(sk, optval, optlen); | |
3850 | break; | |
1da177e4 LT |
3851 | case SCTP_PRIMARY_ADDR: |
3852 | retval = sctp_setsockopt_primary_addr(sk, optval, optlen); | |
3853 | break; | |
3854 | case SCTP_SET_PEER_PRIMARY_ADDR: | |
3855 | retval = sctp_setsockopt_peer_primary_addr(sk, optval, optlen); | |
3856 | break; | |
3857 | case SCTP_NODELAY: | |
3858 | retval = sctp_setsockopt_nodelay(sk, optval, optlen); | |
3859 | break; | |
3860 | case SCTP_RTOINFO: | |
3861 | retval = sctp_setsockopt_rtoinfo(sk, optval, optlen); | |
3862 | break; | |
3863 | case SCTP_ASSOCINFO: | |
3864 | retval = sctp_setsockopt_associnfo(sk, optval, optlen); | |
3865 | break; | |
3866 | case SCTP_I_WANT_MAPPED_V4_ADDR: | |
3867 | retval = sctp_setsockopt_mappedv4(sk, optval, optlen); | |
3868 | break; | |
3869 | case SCTP_MAXSEG: | |
3870 | retval = sctp_setsockopt_maxseg(sk, optval, optlen); | |
3871 | break; | |
0f3fffd8 ISJ |
3872 | case SCTP_ADAPTATION_LAYER: |
3873 | retval = sctp_setsockopt_adaptation_layer(sk, optval, optlen); | |
1da177e4 | 3874 | break; |
6ab792f5 ISJ |
3875 | case SCTP_CONTEXT: |
3876 | retval = sctp_setsockopt_context(sk, optval, optlen); | |
3877 | break; | |
b6e1331f VY |
3878 | case SCTP_FRAGMENT_INTERLEAVE: |
3879 | retval = sctp_setsockopt_fragment_interleave(sk, optval, optlen); | |
3880 | break; | |
70331571 VY |
3881 | case SCTP_MAX_BURST: |
3882 | retval = sctp_setsockopt_maxburst(sk, optval, optlen); | |
3883 | break; | |
65b07e5d VY |
3884 | case SCTP_AUTH_CHUNK: |
3885 | retval = sctp_setsockopt_auth_chunk(sk, optval, optlen); | |
3886 | break; | |
3887 | case SCTP_HMAC_IDENT: | |
3888 | retval = sctp_setsockopt_hmac_ident(sk, optval, optlen); | |
3889 | break; | |
3890 | case SCTP_AUTH_KEY: | |
3891 | retval = sctp_setsockopt_auth_key(sk, optval, optlen); | |
3892 | break; | |
3893 | case SCTP_AUTH_ACTIVE_KEY: | |
3894 | retval = sctp_setsockopt_active_key(sk, optval, optlen); | |
3895 | break; | |
3896 | case SCTP_AUTH_DELETE_KEY: | |
3897 | retval = sctp_setsockopt_del_key(sk, optval, optlen); | |
3898 | break; | |
7dc04d71 MH |
3899 | case SCTP_AUTO_ASCONF: |
3900 | retval = sctp_setsockopt_auto_asconf(sk, optval, optlen); | |
3901 | break; | |
5aa93bcf NH |
3902 | case SCTP_PEER_ADDR_THLDS: |
3903 | retval = sctp_setsockopt_paddr_thresholds(sk, optval, optlen); | |
3904 | break; | |
0d3a421d GOV |
3905 | case SCTP_RECVRCVINFO: |
3906 | retval = sctp_setsockopt_recvrcvinfo(sk, optval, optlen); | |
3907 | break; | |
2347c80f GOV |
3908 | case SCTP_RECVNXTINFO: |
3909 | retval = sctp_setsockopt_recvnxtinfo(sk, optval, optlen); | |
3910 | break; | |
28aa4c26 XL |
3911 | case SCTP_PR_SUPPORTED: |
3912 | retval = sctp_setsockopt_pr_supported(sk, optval, optlen); | |
3913 | break; | |
f959fb44 XL |
3914 | case SCTP_DEFAULT_PRINFO: |
3915 | retval = sctp_setsockopt_default_prinfo(sk, optval, optlen); | |
3916 | break; | |
1da177e4 LT |
3917 | default: |
3918 | retval = -ENOPROTOOPT; | |
3919 | break; | |
3ff50b79 | 3920 | } |
1da177e4 | 3921 | |
048ed4b6 | 3922 | release_sock(sk); |
1da177e4 LT |
3923 | |
3924 | out_nounlock: | |
3925 | return retval; | |
3926 | } | |
3927 | ||
3928 | /* API 3.1.6 connect() - UDP Style Syntax | |
3929 | * | |
3930 | * An application may use the connect() call in the UDP model to initiate an | |
3931 | * association without sending data. | |
3932 | * | |
3933 | * The syntax is: | |
3934 | * | |
3935 | * ret = connect(int sd, const struct sockaddr *nam, socklen_t len); | |
3936 | * | |
3937 | * sd: the socket descriptor to have a new association added to. | |
3938 | * | |
3939 | * nam: the address structure (either struct sockaddr_in or struct | |
3940 | * sockaddr_in6 defined in RFC2553 [7]). | |
3941 | * | |
3942 | * len: the size of the address. | |
3943 | */ | |
dda91928 DB |
3944 | static int sctp_connect(struct sock *sk, struct sockaddr *addr, |
3945 | int addr_len) | |
1da177e4 | 3946 | { |
1da177e4 | 3947 | int err = 0; |
3f7a87d2 | 3948 | struct sctp_af *af; |
1da177e4 | 3949 | |
048ed4b6 | 3950 | lock_sock(sk); |
1da177e4 | 3951 | |
bb33381d DB |
3952 | pr_debug("%s: sk:%p, sockaddr:%p, addr_len:%d\n", __func__, sk, |
3953 | addr, addr_len); | |
1da177e4 | 3954 | |
3f7a87d2 FF |
3955 | /* Validate addr_len before calling common connect/connectx routine. */ |
3956 | af = sctp_get_af_specific(addr->sa_family); | |
3957 | if (!af || addr_len < af->sockaddr_len) { | |
3958 | err = -EINVAL; | |
3959 | } else { | |
3960 | /* Pass correct addr len to common routine (so it knows there | |
3961 | * is only one address being passed. | |
3962 | */ | |
88a0a948 | 3963 | err = __sctp_connect(sk, addr, af->sockaddr_len, NULL); |
1da177e4 LT |
3964 | } |
3965 | ||
048ed4b6 | 3966 | release_sock(sk); |
1da177e4 LT |
3967 | return err; |
3968 | } | |
3969 | ||
3970 | /* FIXME: Write comments. */ | |
dda91928 | 3971 | static int sctp_disconnect(struct sock *sk, int flags) |
1da177e4 LT |
3972 | { |
3973 | return -EOPNOTSUPP; /* STUB */ | |
3974 | } | |
3975 | ||
3976 | /* 4.1.4 accept() - TCP Style Syntax | |
3977 | * | |
3978 | * Applications use accept() call to remove an established SCTP | |
3979 | * association from the accept queue of the endpoint. A new socket | |
3980 | * descriptor will be returned from accept() to represent the newly | |
3981 | * formed association. | |
3982 | */ | |
dda91928 | 3983 | static struct sock *sctp_accept(struct sock *sk, int flags, int *err) |
1da177e4 LT |
3984 | { |
3985 | struct sctp_sock *sp; | |
3986 | struct sctp_endpoint *ep; | |
3987 | struct sock *newsk = NULL; | |
3988 | struct sctp_association *asoc; | |
3989 | long timeo; | |
3990 | int error = 0; | |
3991 | ||
048ed4b6 | 3992 | lock_sock(sk); |
1da177e4 LT |
3993 | |
3994 | sp = sctp_sk(sk); | |
3995 | ep = sp->ep; | |
3996 | ||
3997 | if (!sctp_style(sk, TCP)) { | |
3998 | error = -EOPNOTSUPP; | |
3999 | goto out; | |
4000 | } | |
4001 | ||
4002 | if (!sctp_sstate(sk, LISTENING)) { | |
4003 | error = -EINVAL; | |
4004 | goto out; | |
4005 | } | |
4006 | ||
8abfedd8 | 4007 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
1da177e4 LT |
4008 | |
4009 | error = sctp_wait_for_accept(sk, timeo); | |
4010 | if (error) | |
4011 | goto out; | |
4012 | ||
4013 | /* We treat the list of associations on the endpoint as the accept | |
4014 | * queue and pick the first association on the list. | |
4015 | */ | |
4016 | asoc = list_entry(ep->asocs.next, struct sctp_association, asocs); | |
4017 | ||
4018 | newsk = sp->pf->create_accept_sk(sk, asoc); | |
4019 | if (!newsk) { | |
4020 | error = -ENOMEM; | |
4021 | goto out; | |
4022 | } | |
4023 | ||
4024 | /* Populate the fields of the newsk from the oldsk and migrate the | |
4025 | * asoc to the newsk. | |
4026 | */ | |
4027 | sctp_sock_migrate(sk, newsk, asoc, SCTP_SOCKET_TCP); | |
4028 | ||
4029 | out: | |
048ed4b6 | 4030 | release_sock(sk); |
d808ad9a | 4031 | *err = error; |
1da177e4 LT |
4032 | return newsk; |
4033 | } | |
4034 | ||
4035 | /* The SCTP ioctl handler. */ | |
dda91928 | 4036 | static int sctp_ioctl(struct sock *sk, int cmd, unsigned long arg) |
1da177e4 | 4037 | { |
65040c33 DEFP |
4038 | int rc = -ENOTCONN; |
4039 | ||
048ed4b6 | 4040 | lock_sock(sk); |
65040c33 DEFP |
4041 | |
4042 | /* | |
4043 | * SEQPACKET-style sockets in LISTENING state are valid, for | |
4044 | * SCTP, so only discard TCP-style sockets in LISTENING state. | |
4045 | */ | |
4046 | if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING)) | |
4047 | goto out; | |
4048 | ||
4049 | switch (cmd) { | |
4050 | case SIOCINQ: { | |
4051 | struct sk_buff *skb; | |
4052 | unsigned int amount = 0; | |
4053 | ||
4054 | skb = skb_peek(&sk->sk_receive_queue); | |
4055 | if (skb != NULL) { | |
4056 | /* | |
4057 | * We will only return the amount of this packet since | |
4058 | * that is all that will be read. | |
4059 | */ | |
4060 | amount = skb->len; | |
4061 | } | |
4062 | rc = put_user(amount, (int __user *)arg); | |
65040c33 | 4063 | break; |
9a7241c2 | 4064 | } |
65040c33 DEFP |
4065 | default: |
4066 | rc = -ENOIOCTLCMD; | |
4067 | break; | |
4068 | } | |
4069 | out: | |
048ed4b6 | 4070 | release_sock(sk); |
65040c33 | 4071 | return rc; |
1da177e4 LT |
4072 | } |
4073 | ||
4074 | /* This is the function which gets called during socket creation to | |
4075 | * initialized the SCTP-specific portion of the sock. | |
4076 | * The sock structure should already be zero-filled memory. | |
4077 | */ | |
dda91928 | 4078 | static int sctp_init_sock(struct sock *sk) |
1da177e4 | 4079 | { |
e1fc3b14 | 4080 | struct net *net = sock_net(sk); |
1da177e4 LT |
4081 | struct sctp_sock *sp; |
4082 | ||
bb33381d | 4083 | pr_debug("%s: sk:%p\n", __func__, sk); |
1da177e4 LT |
4084 | |
4085 | sp = sctp_sk(sk); | |
4086 | ||
4087 | /* Initialize the SCTP per socket area. */ | |
4088 | switch (sk->sk_type) { | |
4089 | case SOCK_SEQPACKET: | |
4090 | sp->type = SCTP_SOCKET_UDP; | |
4091 | break; | |
4092 | case SOCK_STREAM: | |
4093 | sp->type = SCTP_SOCKET_TCP; | |
4094 | break; | |
4095 | default: | |
4096 | return -ESOCKTNOSUPPORT; | |
4097 | } | |
4098 | ||
90017acc MRL |
4099 | sk->sk_gso_type = SKB_GSO_SCTP; |
4100 | ||
1da177e4 LT |
4101 | /* Initialize default send parameters. These parameters can be |
4102 | * modified with the SCTP_DEFAULT_SEND_PARAM socket option. | |
4103 | */ | |
4104 | sp->default_stream = 0; | |
4105 | sp->default_ppid = 0; | |
4106 | sp->default_flags = 0; | |
4107 | sp->default_context = 0; | |
4108 | sp->default_timetolive = 0; | |
4109 | ||
6ab792f5 | 4110 | sp->default_rcv_context = 0; |
e1fc3b14 | 4111 | sp->max_burst = net->sctp.max_burst; |
6ab792f5 | 4112 | |
3c68198e NH |
4113 | sp->sctp_hmac_alg = net->sctp.sctp_hmac_alg; |
4114 | ||
1da177e4 LT |
4115 | /* Initialize default setup parameters. These parameters |
4116 | * can be modified with the SCTP_INITMSG socket option or | |
4117 | * overridden by the SCTP_INIT CMSG. | |
4118 | */ | |
4119 | sp->initmsg.sinit_num_ostreams = sctp_max_outstreams; | |
4120 | sp->initmsg.sinit_max_instreams = sctp_max_instreams; | |
e1fc3b14 EB |
4121 | sp->initmsg.sinit_max_attempts = net->sctp.max_retrans_init; |
4122 | sp->initmsg.sinit_max_init_timeo = net->sctp.rto_max; | |
1da177e4 LT |
4123 | |
4124 | /* Initialize default RTO related parameters. These parameters can | |
4125 | * be modified for with the SCTP_RTOINFO socket option. | |
4126 | */ | |
e1fc3b14 EB |
4127 | sp->rtoinfo.srto_initial = net->sctp.rto_initial; |
4128 | sp->rtoinfo.srto_max = net->sctp.rto_max; | |
4129 | sp->rtoinfo.srto_min = net->sctp.rto_min; | |
1da177e4 LT |
4130 | |
4131 | /* Initialize default association related parameters. These parameters | |
4132 | * can be modified with the SCTP_ASSOCINFO socket option. | |
4133 | */ | |
e1fc3b14 | 4134 | sp->assocparams.sasoc_asocmaxrxt = net->sctp.max_retrans_association; |
1da177e4 LT |
4135 | sp->assocparams.sasoc_number_peer_destinations = 0; |
4136 | sp->assocparams.sasoc_peer_rwnd = 0; | |
4137 | sp->assocparams.sasoc_local_rwnd = 0; | |
e1fc3b14 | 4138 | sp->assocparams.sasoc_cookie_life = net->sctp.valid_cookie_life; |
1da177e4 LT |
4139 | |
4140 | /* Initialize default event subscriptions. By default, all the | |
d808ad9a | 4141 | * options are off. |
1da177e4 LT |
4142 | */ |
4143 | memset(&sp->subscribe, 0, sizeof(struct sctp_event_subscribe)); | |
4144 | ||
4145 | /* Default Peer Address Parameters. These defaults can | |
4146 | * be modified via SCTP_PEER_ADDR_PARAMS | |
4147 | */ | |
e1fc3b14 EB |
4148 | sp->hbinterval = net->sctp.hb_interval; |
4149 | sp->pathmaxrxt = net->sctp.max_retrans_path; | |
4e2d52bf | 4150 | sp->pathmtu = 0; /* allow default discovery */ |
e1fc3b14 | 4151 | sp->sackdelay = net->sctp.sack_timeout; |
7bfe8bdb | 4152 | sp->sackfreq = 2; |
52ccb8e9 | 4153 | sp->param_flags = SPP_HB_ENABLE | |
d808ad9a YH |
4154 | SPP_PMTUD_ENABLE | |
4155 | SPP_SACKDELAY_ENABLE; | |
1da177e4 LT |
4156 | |
4157 | /* If enabled no SCTP message fragmentation will be performed. | |
4158 | * Configure through SCTP_DISABLE_FRAGMENTS socket option. | |
4159 | */ | |
4160 | sp->disable_fragments = 0; | |
4161 | ||
208edef6 SS |
4162 | /* Enable Nagle algorithm by default. */ |
4163 | sp->nodelay = 0; | |
1da177e4 | 4164 | |
0d3a421d | 4165 | sp->recvrcvinfo = 0; |
2347c80f | 4166 | sp->recvnxtinfo = 0; |
0d3a421d | 4167 | |
1da177e4 LT |
4168 | /* Enable by default. */ |
4169 | sp->v4mapped = 1; | |
4170 | ||
4171 | /* Auto-close idle associations after the configured | |
4172 | * number of seconds. A value of 0 disables this | |
4173 | * feature. Configure through the SCTP_AUTOCLOSE socket option, | |
4174 | * for UDP-style sockets only. | |
4175 | */ | |
4176 | sp->autoclose = 0; | |
4177 | ||
4178 | /* User specified fragmentation limit. */ | |
4179 | sp->user_frag = 0; | |
4180 | ||
0f3fffd8 | 4181 | sp->adaptation_ind = 0; |
1da177e4 LT |
4182 | |
4183 | sp->pf = sctp_get_pf_specific(sk->sk_family); | |
4184 | ||
4185 | /* Control variables for partial data delivery. */ | |
b6e1331f | 4186 | atomic_set(&sp->pd_mode, 0); |
1da177e4 | 4187 | skb_queue_head_init(&sp->pd_lobby); |
b6e1331f | 4188 | sp->frag_interleave = 0; |
1da177e4 LT |
4189 | |
4190 | /* Create a per socket endpoint structure. Even if we | |
4191 | * change the data structure relationships, this may still | |
4192 | * be useful for storing pre-connect address information. | |
4193 | */ | |
c164b838 DB |
4194 | sp->ep = sctp_endpoint_new(sk, GFP_KERNEL); |
4195 | if (!sp->ep) | |
1da177e4 LT |
4196 | return -ENOMEM; |
4197 | ||
1da177e4 LT |
4198 | sp->hmac = NULL; |
4199 | ||
0a2fbac1 DB |
4200 | sk->sk_destruct = sctp_destruct_sock; |
4201 | ||
1da177e4 | 4202 | SCTP_DBG_OBJCNT_INC(sock); |
6f756a8c DM |
4203 | |
4204 | local_bh_disable(); | |
81419d86 | 4205 | percpu_counter_inc(&sctp_sockets_allocated); |
e1fc3b14 | 4206 | sock_prot_inuse_add(net, sk->sk_prot, 1); |
2d45a02d MRL |
4207 | |
4208 | /* Nothing can fail after this block, otherwise | |
4209 | * sctp_destroy_sock() will be called without addr_wq_lock held | |
4210 | */ | |
e1fc3b14 | 4211 | if (net->sctp.default_auto_asconf) { |
2d45a02d | 4212 | spin_lock(&sock_net(sk)->sctp.addr_wq_lock); |
9f7d653b | 4213 | list_add_tail(&sp->auto_asconf_list, |
e1fc3b14 | 4214 | &net->sctp.auto_asconf_splist); |
9f7d653b | 4215 | sp->do_auto_asconf = 1; |
2d45a02d MRL |
4216 | spin_unlock(&sock_net(sk)->sctp.addr_wq_lock); |
4217 | } else { | |
9f7d653b | 4218 | sp->do_auto_asconf = 0; |
2d45a02d MRL |
4219 | } |
4220 | ||
6f756a8c DM |
4221 | local_bh_enable(); |
4222 | ||
1da177e4 LT |
4223 | return 0; |
4224 | } | |
4225 | ||
2d45a02d MRL |
4226 | /* Cleanup any SCTP per socket resources. Must be called with |
4227 | * sock_net(sk)->sctp.addr_wq_lock held if sp->do_auto_asconf is true | |
4228 | */ | |
dda91928 | 4229 | static void sctp_destroy_sock(struct sock *sk) |
1da177e4 | 4230 | { |
9f7d653b | 4231 | struct sctp_sock *sp; |
1da177e4 | 4232 | |
bb33381d | 4233 | pr_debug("%s: sk:%p\n", __func__, sk); |
1da177e4 LT |
4234 | |
4235 | /* Release our hold on the endpoint. */ | |
9f7d653b | 4236 | sp = sctp_sk(sk); |
1abd165e DB |
4237 | /* This could happen during socket init, thus we bail out |
4238 | * early, since the rest of the below is not setup either. | |
4239 | */ | |
4240 | if (sp->ep == NULL) | |
4241 | return; | |
4242 | ||
9f7d653b MH |
4243 | if (sp->do_auto_asconf) { |
4244 | sp->do_auto_asconf = 0; | |
4245 | list_del(&sp->auto_asconf_list); | |
4246 | } | |
4247 | sctp_endpoint_free(sp->ep); | |
5bc0b3bf | 4248 | local_bh_disable(); |
81419d86 | 4249 | percpu_counter_dec(&sctp_sockets_allocated); |
9a57f7fa | 4250 | sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); |
5bc0b3bf | 4251 | local_bh_enable(); |
1da177e4 LT |
4252 | } |
4253 | ||
0a2fbac1 DB |
4254 | /* Triggered when there are no references on the socket anymore */ |
4255 | static void sctp_destruct_sock(struct sock *sk) | |
4256 | { | |
4257 | struct sctp_sock *sp = sctp_sk(sk); | |
4258 | ||
4259 | /* Free up the HMAC transform. */ | |
5821c769 | 4260 | crypto_free_shash(sp->hmac); |
0a2fbac1 DB |
4261 | |
4262 | inet_sock_destruct(sk); | |
4263 | } | |
4264 | ||
1da177e4 LT |
4265 | /* API 4.1.7 shutdown() - TCP Style Syntax |
4266 | * int shutdown(int socket, int how); | |
4267 | * | |
4268 | * sd - the socket descriptor of the association to be closed. | |
4269 | * how - Specifies the type of shutdown. The values are | |
4270 | * as follows: | |
4271 | * SHUT_RD | |
4272 | * Disables further receive operations. No SCTP | |
4273 | * protocol action is taken. | |
4274 | * SHUT_WR | |
4275 | * Disables further send operations, and initiates | |
4276 | * the SCTP shutdown sequence. | |
4277 | * SHUT_RDWR | |
4278 | * Disables further send and receive operations | |
4279 | * and initiates the SCTP shutdown sequence. | |
4280 | */ | |
dda91928 | 4281 | static void sctp_shutdown(struct sock *sk, int how) |
1da177e4 | 4282 | { |
55e26eb9 | 4283 | struct net *net = sock_net(sk); |
1da177e4 LT |
4284 | struct sctp_endpoint *ep; |
4285 | struct sctp_association *asoc; | |
4286 | ||
4287 | if (!sctp_style(sk, TCP)) | |
4288 | return; | |
4289 | ||
4290 | if (how & SEND_SHUTDOWN) { | |
d46e416c | 4291 | sk->sk_state = SCTP_SS_CLOSING; |
1da177e4 LT |
4292 | ep = sctp_sk(sk)->ep; |
4293 | if (!list_empty(&ep->asocs)) { | |
4294 | asoc = list_entry(ep->asocs.next, | |
4295 | struct sctp_association, asocs); | |
55e26eb9 | 4296 | sctp_primitive_SHUTDOWN(net, asoc, NULL); |
1da177e4 LT |
4297 | } |
4298 | } | |
4299 | } | |
4300 | ||
52c52a61 XL |
4301 | int sctp_get_sctp_info(struct sock *sk, struct sctp_association *asoc, |
4302 | struct sctp_info *info) | |
4303 | { | |
4304 | struct sctp_transport *prim; | |
4305 | struct list_head *pos; | |
4306 | int mask; | |
4307 | ||
4308 | memset(info, 0, sizeof(*info)); | |
4309 | if (!asoc) { | |
4310 | struct sctp_sock *sp = sctp_sk(sk); | |
4311 | ||
4312 | info->sctpi_s_autoclose = sp->autoclose; | |
4313 | info->sctpi_s_adaptation_ind = sp->adaptation_ind; | |
4314 | info->sctpi_s_pd_point = sp->pd_point; | |
4315 | info->sctpi_s_nodelay = sp->nodelay; | |
4316 | info->sctpi_s_disable_fragments = sp->disable_fragments; | |
4317 | info->sctpi_s_v4mapped = sp->v4mapped; | |
4318 | info->sctpi_s_frag_interleave = sp->frag_interleave; | |
40eb90e9 | 4319 | info->sctpi_s_type = sp->type; |
52c52a61 XL |
4320 | |
4321 | return 0; | |
4322 | } | |
4323 | ||
4324 | info->sctpi_tag = asoc->c.my_vtag; | |
4325 | info->sctpi_state = asoc->state; | |
4326 | info->sctpi_rwnd = asoc->a_rwnd; | |
4327 | info->sctpi_unackdata = asoc->unack_data; | |
4328 | info->sctpi_penddata = sctp_tsnmap_pending(&asoc->peer.tsn_map); | |
4329 | info->sctpi_instrms = asoc->c.sinit_max_instreams; | |
4330 | info->sctpi_outstrms = asoc->c.sinit_num_ostreams; | |
4331 | list_for_each(pos, &asoc->base.inqueue.in_chunk_list) | |
4332 | info->sctpi_inqueue++; | |
4333 | list_for_each(pos, &asoc->outqueue.out_chunk_list) | |
4334 | info->sctpi_outqueue++; | |
4335 | info->sctpi_overall_error = asoc->overall_error_count; | |
4336 | info->sctpi_max_burst = asoc->max_burst; | |
4337 | info->sctpi_maxseg = asoc->frag_point; | |
4338 | info->sctpi_peer_rwnd = asoc->peer.rwnd; | |
4339 | info->sctpi_peer_tag = asoc->c.peer_vtag; | |
4340 | ||
4341 | mask = asoc->peer.ecn_capable << 1; | |
4342 | mask = (mask | asoc->peer.ipv4_address) << 1; | |
4343 | mask = (mask | asoc->peer.ipv6_address) << 1; | |
4344 | mask = (mask | asoc->peer.hostname_address) << 1; | |
4345 | mask = (mask | asoc->peer.asconf_capable) << 1; | |
4346 | mask = (mask | asoc->peer.prsctp_capable) << 1; | |
4347 | mask = (mask | asoc->peer.auth_capable); | |
4348 | info->sctpi_peer_capable = mask; | |
4349 | mask = asoc->peer.sack_needed << 1; | |
4350 | mask = (mask | asoc->peer.sack_generation) << 1; | |
4351 | mask = (mask | asoc->peer.zero_window_announced); | |
4352 | info->sctpi_peer_sack = mask; | |
4353 | ||
4354 | info->sctpi_isacks = asoc->stats.isacks; | |
4355 | info->sctpi_osacks = asoc->stats.osacks; | |
4356 | info->sctpi_opackets = asoc->stats.opackets; | |
4357 | info->sctpi_ipackets = asoc->stats.ipackets; | |
4358 | info->sctpi_rtxchunks = asoc->stats.rtxchunks; | |
4359 | info->sctpi_outofseqtsns = asoc->stats.outofseqtsns; | |
4360 | info->sctpi_idupchunks = asoc->stats.idupchunks; | |
4361 | info->sctpi_gapcnt = asoc->stats.gapcnt; | |
4362 | info->sctpi_ouodchunks = asoc->stats.ouodchunks; | |
4363 | info->sctpi_iuodchunks = asoc->stats.iuodchunks; | |
4364 | info->sctpi_oodchunks = asoc->stats.oodchunks; | |
4365 | info->sctpi_iodchunks = asoc->stats.iodchunks; | |
4366 | info->sctpi_octrlchunks = asoc->stats.octrlchunks; | |
4367 | info->sctpi_ictrlchunks = asoc->stats.ictrlchunks; | |
4368 | ||
4369 | prim = asoc->peer.primary_path; | |
4370 | memcpy(&info->sctpi_p_address, &prim->ipaddr, | |
4371 | sizeof(struct sockaddr_storage)); | |
4372 | info->sctpi_p_state = prim->state; | |
4373 | info->sctpi_p_cwnd = prim->cwnd; | |
4374 | info->sctpi_p_srtt = prim->srtt; | |
4375 | info->sctpi_p_rto = jiffies_to_msecs(prim->rto); | |
4376 | info->sctpi_p_hbinterval = prim->hbinterval; | |
4377 | info->sctpi_p_pathmaxrxt = prim->pathmaxrxt; | |
4378 | info->sctpi_p_sackdelay = jiffies_to_msecs(prim->sackdelay); | |
4379 | info->sctpi_p_ssthresh = prim->ssthresh; | |
4380 | info->sctpi_p_partial_bytes_acked = prim->partial_bytes_acked; | |
4381 | info->sctpi_p_flight_size = prim->flight_size; | |
4382 | info->sctpi_p_error = prim->error_count; | |
4383 | ||
4384 | return 0; | |
4385 | } | |
4386 | EXPORT_SYMBOL_GPL(sctp_get_sctp_info); | |
4387 | ||
626d16f5 XL |
4388 | /* use callback to avoid exporting the core structure */ |
4389 | int sctp_transport_walk_start(struct rhashtable_iter *iter) | |
4390 | { | |
4391 | int err; | |
4392 | ||
4393 | err = rhashtable_walk_init(&sctp_transport_hashtable, iter, | |
4394 | GFP_KERNEL); | |
4395 | if (err) | |
4396 | return err; | |
4397 | ||
4398 | err = rhashtable_walk_start(iter); | |
53fa1036 | 4399 | if (err && err != -EAGAIN) { |
5fc382d8 | 4400 | rhashtable_walk_stop(iter); |
53fa1036 XL |
4401 | rhashtable_walk_exit(iter); |
4402 | return err; | |
4403 | } | |
626d16f5 | 4404 | |
53fa1036 | 4405 | return 0; |
626d16f5 XL |
4406 | } |
4407 | ||
4408 | void sctp_transport_walk_stop(struct rhashtable_iter *iter) | |
4409 | { | |
4410 | rhashtable_walk_stop(iter); | |
4411 | rhashtable_walk_exit(iter); | |
4412 | } | |
4413 | ||
4414 | struct sctp_transport *sctp_transport_get_next(struct net *net, | |
4415 | struct rhashtable_iter *iter) | |
4416 | { | |
4417 | struct sctp_transport *t; | |
4418 | ||
4419 | t = rhashtable_walk_next(iter); | |
4420 | for (; t; t = rhashtable_walk_next(iter)) { | |
4421 | if (IS_ERR(t)) { | |
4422 | if (PTR_ERR(t) == -EAGAIN) | |
4423 | continue; | |
4424 | break; | |
4425 | } | |
4426 | ||
4427 | if (net_eq(sock_net(t->asoc->base.sk), net) && | |
4428 | t->asoc->peer.primary_path == t) | |
4429 | break; | |
4430 | } | |
4431 | ||
4432 | return t; | |
4433 | } | |
4434 | ||
4435 | struct sctp_transport *sctp_transport_get_idx(struct net *net, | |
4436 | struct rhashtable_iter *iter, | |
4437 | int pos) | |
4438 | { | |
4439 | void *obj = SEQ_START_TOKEN; | |
4440 | ||
4441 | while (pos && (obj = sctp_transport_get_next(net, iter)) && | |
4442 | !IS_ERR(obj)) | |
4443 | pos--; | |
4444 | ||
4445 | return obj; | |
4446 | } | |
4447 | ||
4448 | int sctp_for_each_endpoint(int (*cb)(struct sctp_endpoint *, void *), | |
4449 | void *p) { | |
4450 | int err = 0; | |
4451 | int hash = 0; | |
4452 | struct sctp_ep_common *epb; | |
4453 | struct sctp_hashbucket *head; | |
4454 | ||
4455 | for (head = sctp_ep_hashtable; hash < sctp_ep_hashsize; | |
4456 | hash++, head++) { | |
4457 | read_lock(&head->lock); | |
4458 | sctp_for_each_hentry(epb, &head->chain) { | |
4459 | err = cb(sctp_ep(epb), p); | |
4460 | if (err) | |
4461 | break; | |
4462 | } | |
4463 | read_unlock(&head->lock); | |
4464 | } | |
4465 | ||
4466 | return err; | |
4467 | } | |
4468 | EXPORT_SYMBOL_GPL(sctp_for_each_endpoint); | |
4469 | ||
4470 | int sctp_transport_lookup_process(int (*cb)(struct sctp_transport *, void *), | |
4471 | struct net *net, | |
4472 | const union sctp_addr *laddr, | |
4473 | const union sctp_addr *paddr, void *p) | |
4474 | { | |
4475 | struct sctp_transport *transport; | |
1cceda78 | 4476 | int err = -ENOENT; |
626d16f5 XL |
4477 | |
4478 | rcu_read_lock(); | |
4479 | transport = sctp_addrs_lookup_transport(net, laddr, paddr); | |
4480 | if (!transport || !sctp_transport_hold(transport)) | |
4481 | goto out; | |
1cceda78 XL |
4482 | |
4483 | sctp_association_hold(transport->asoc); | |
626d16f5 XL |
4484 | sctp_transport_put(transport); |
4485 | ||
626d16f5 | 4486 | rcu_read_unlock(); |
1cceda78 XL |
4487 | err = cb(transport, p); |
4488 | sctp_association_put(transport->asoc); | |
4489 | ||
4490 | out: | |
626d16f5 XL |
4491 | return err; |
4492 | } | |
4493 | EXPORT_SYMBOL_GPL(sctp_transport_lookup_process); | |
4494 | ||
4495 | int sctp_for_each_transport(int (*cb)(struct sctp_transport *, void *), | |
4496 | struct net *net, int pos, void *p) { | |
4497 | struct rhashtable_iter hti; | |
626d16f5 | 4498 | void *obj; |
53fa1036 | 4499 | int err; |
626d16f5 | 4500 | |
53fa1036 XL |
4501 | err = sctp_transport_walk_start(&hti); |
4502 | if (err) | |
4503 | return err; | |
626d16f5 XL |
4504 | |
4505 | sctp_transport_get_idx(net, &hti, pos); | |
4506 | obj = sctp_transport_get_next(net, &hti); | |
4507 | for (; obj && !IS_ERR(obj); obj = sctp_transport_get_next(net, &hti)) { | |
4508 | struct sctp_transport *transport = obj; | |
4509 | ||
4510 | if (!sctp_transport_hold(transport)) | |
4511 | continue; | |
4512 | err = cb(transport, p); | |
4513 | sctp_transport_put(transport); | |
4514 | if (err) | |
4515 | break; | |
4516 | } | |
626d16f5 | 4517 | sctp_transport_walk_stop(&hti); |
53fa1036 | 4518 | |
626d16f5 XL |
4519 | return err; |
4520 | } | |
4521 | EXPORT_SYMBOL_GPL(sctp_for_each_transport); | |
4522 | ||
1da177e4 LT |
4523 | /* 7.2.1 Association Status (SCTP_STATUS) |
4524 | ||
4525 | * Applications can retrieve current status information about an | |
4526 | * association, including association state, peer receiver window size, | |
4527 | * number of unacked data chunks, and number of data chunks pending | |
4528 | * receipt. This information is read-only. | |
4529 | */ | |
4530 | static int sctp_getsockopt_sctp_status(struct sock *sk, int len, | |
4531 | char __user *optval, | |
4532 | int __user *optlen) | |
4533 | { | |
4534 | struct sctp_status status; | |
4535 | struct sctp_association *asoc = NULL; | |
4536 | struct sctp_transport *transport; | |
4537 | sctp_assoc_t associd; | |
4538 | int retval = 0; | |
4539 | ||
408f22e8 | 4540 | if (len < sizeof(status)) { |
1da177e4 LT |
4541 | retval = -EINVAL; |
4542 | goto out; | |
4543 | } | |
4544 | ||
408f22e8 NH |
4545 | len = sizeof(status); |
4546 | if (copy_from_user(&status, optval, len)) { | |
1da177e4 LT |
4547 | retval = -EFAULT; |
4548 | goto out; | |
4549 | } | |
4550 | ||
4551 | associd = status.sstat_assoc_id; | |
4552 | asoc = sctp_id2assoc(sk, associd); | |
4553 | if (!asoc) { | |
4554 | retval = -EINVAL; | |
4555 | goto out; | |
4556 | } | |
4557 | ||
4558 | transport = asoc->peer.primary_path; | |
4559 | ||
4560 | status.sstat_assoc_id = sctp_assoc2id(asoc); | |
38ab1fa9 | 4561 | status.sstat_state = sctp_assoc_to_state(asoc); |
1da177e4 LT |
4562 | status.sstat_rwnd = asoc->peer.rwnd; |
4563 | status.sstat_unackdata = asoc->unack_data; | |
4564 | ||
4565 | status.sstat_penddata = sctp_tsnmap_pending(&asoc->peer.tsn_map); | |
4566 | status.sstat_instrms = asoc->c.sinit_max_instreams; | |
4567 | status.sstat_outstrms = asoc->c.sinit_num_ostreams; | |
4568 | status.sstat_fragmentation_point = asoc->frag_point; | |
4569 | status.sstat_primary.spinfo_assoc_id = sctp_assoc2id(transport->asoc); | |
8cec6b80 AV |
4570 | memcpy(&status.sstat_primary.spinfo_address, &transport->ipaddr, |
4571 | transport->af_specific->sockaddr_len); | |
1da177e4 | 4572 | /* Map ipv4 address into v4-mapped-on-v6 address. */ |
299ee123 | 4573 | sctp_get_pf_specific(sk->sk_family)->addr_to_user(sctp_sk(sk), |
1da177e4 | 4574 | (union sctp_addr *)&status.sstat_primary.spinfo_address); |
3f7a87d2 | 4575 | status.sstat_primary.spinfo_state = transport->state; |
1da177e4 LT |
4576 | status.sstat_primary.spinfo_cwnd = transport->cwnd; |
4577 | status.sstat_primary.spinfo_srtt = transport->srtt; | |
4578 | status.sstat_primary.spinfo_rto = jiffies_to_msecs(transport->rto); | |
52ccb8e9 | 4579 | status.sstat_primary.spinfo_mtu = transport->pathmtu; |
1da177e4 | 4580 | |
3f7a87d2 FF |
4581 | if (status.sstat_primary.spinfo_state == SCTP_UNKNOWN) |
4582 | status.sstat_primary.spinfo_state = SCTP_ACTIVE; | |
4583 | ||
1da177e4 LT |
4584 | if (put_user(len, optlen)) { |
4585 | retval = -EFAULT; | |
4586 | goto out; | |
4587 | } | |
4588 | ||
bb33381d DB |
4589 | pr_debug("%s: len:%d, state:%d, rwnd:%d, assoc_id:%d\n", |
4590 | __func__, len, status.sstat_state, status.sstat_rwnd, | |
4591 | status.sstat_assoc_id); | |
1da177e4 LT |
4592 | |
4593 | if (copy_to_user(optval, &status, len)) { | |
4594 | retval = -EFAULT; | |
4595 | goto out; | |
4596 | } | |
4597 | ||
4598 | out: | |
a02cec21 | 4599 | return retval; |
1da177e4 LT |
4600 | } |
4601 | ||
4602 | ||
4603 | /* 7.2.2 Peer Address Information (SCTP_GET_PEER_ADDR_INFO) | |
4604 | * | |
4605 | * Applications can retrieve information about a specific peer address | |
4606 | * of an association, including its reachability state, congestion | |
4607 | * window, and retransmission timer values. This information is | |
4608 | * read-only. | |
4609 | */ | |
4610 | static int sctp_getsockopt_peer_addr_info(struct sock *sk, int len, | |
4611 | char __user *optval, | |
4612 | int __user *optlen) | |
4613 | { | |
4614 | struct sctp_paddrinfo pinfo; | |
4615 | struct sctp_transport *transport; | |
4616 | int retval = 0; | |
4617 | ||
408f22e8 | 4618 | if (len < sizeof(pinfo)) { |
1da177e4 LT |
4619 | retval = -EINVAL; |
4620 | goto out; | |
4621 | } | |
4622 | ||
408f22e8 NH |
4623 | len = sizeof(pinfo); |
4624 | if (copy_from_user(&pinfo, optval, len)) { | |
1da177e4 LT |
4625 | retval = -EFAULT; |
4626 | goto out; | |
4627 | } | |
4628 | ||
4629 | transport = sctp_addr_id2transport(sk, &pinfo.spinfo_address, | |
4630 | pinfo.spinfo_assoc_id); | |
4631 | if (!transport) | |
4632 | return -EINVAL; | |
4633 | ||
4634 | pinfo.spinfo_assoc_id = sctp_assoc2id(transport->asoc); | |
3f7a87d2 | 4635 | pinfo.spinfo_state = transport->state; |
1da177e4 LT |
4636 | pinfo.spinfo_cwnd = transport->cwnd; |
4637 | pinfo.spinfo_srtt = transport->srtt; | |
4638 | pinfo.spinfo_rto = jiffies_to_msecs(transport->rto); | |
52ccb8e9 | 4639 | pinfo.spinfo_mtu = transport->pathmtu; |
1da177e4 | 4640 | |
3f7a87d2 FF |
4641 | if (pinfo.spinfo_state == SCTP_UNKNOWN) |
4642 | pinfo.spinfo_state = SCTP_ACTIVE; | |
4643 | ||
1da177e4 LT |
4644 | if (put_user(len, optlen)) { |
4645 | retval = -EFAULT; | |
4646 | goto out; | |
4647 | } | |
4648 | ||
4649 | if (copy_to_user(optval, &pinfo, len)) { | |
4650 | retval = -EFAULT; | |
4651 | goto out; | |
4652 | } | |
4653 | ||
4654 | out: | |
a02cec21 | 4655 | return retval; |
1da177e4 LT |
4656 | } |
4657 | ||
4658 | /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS) | |
4659 | * | |
4660 | * This option is a on/off flag. If enabled no SCTP message | |
4661 | * fragmentation will be performed. Instead if a message being sent | |
4662 | * exceeds the current PMTU size, the message will NOT be sent and | |
4663 | * instead a error will be indicated to the user. | |
4664 | */ | |
4665 | static int sctp_getsockopt_disable_fragments(struct sock *sk, int len, | |
4666 | char __user *optval, int __user *optlen) | |
4667 | { | |
4668 | int val; | |
4669 | ||
4670 | if (len < sizeof(int)) | |
4671 | return -EINVAL; | |
4672 | ||
4673 | len = sizeof(int); | |
4674 | val = (sctp_sk(sk)->disable_fragments == 1); | |
4675 | if (put_user(len, optlen)) | |
4676 | return -EFAULT; | |
4677 | if (copy_to_user(optval, &val, len)) | |
4678 | return -EFAULT; | |
4679 | return 0; | |
4680 | } | |
4681 | ||
4682 | /* 7.1.15 Set notification and ancillary events (SCTP_EVENTS) | |
4683 | * | |
4684 | * This socket option is used to specify various notifications and | |
4685 | * ancillary data the user wishes to receive. | |
4686 | */ | |
4687 | static int sctp_getsockopt_events(struct sock *sk, int len, char __user *optval, | |
4688 | int __user *optlen) | |
4689 | { | |
acdd5985 | 4690 | if (len <= 0) |
1da177e4 | 4691 | return -EINVAL; |
acdd5985 TG |
4692 | if (len > sizeof(struct sctp_event_subscribe)) |
4693 | len = sizeof(struct sctp_event_subscribe); | |
408f22e8 NH |
4694 | if (put_user(len, optlen)) |
4695 | return -EFAULT; | |
1da177e4 LT |
4696 | if (copy_to_user(optval, &sctp_sk(sk)->subscribe, len)) |
4697 | return -EFAULT; | |
4698 | return 0; | |
4699 | } | |
4700 | ||
4701 | /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE) | |
4702 | * | |
4703 | * This socket option is applicable to the UDP-style socket only. When | |
4704 | * set it will cause associations that are idle for more than the | |
4705 | * specified number of seconds to automatically close. An association | |
4706 | * being idle is defined an association that has NOT sent or received | |
4707 | * user data. The special value of '0' indicates that no automatic | |
4708 | * close of any associations should be performed. The option expects an | |
4709 | * integer defining the number of seconds of idle time before an | |
4710 | * association is closed. | |
4711 | */ | |
4712 | static int sctp_getsockopt_autoclose(struct sock *sk, int len, char __user *optval, int __user *optlen) | |
4713 | { | |
4714 | /* Applicable to UDP-style socket only */ | |
4715 | if (sctp_style(sk, TCP)) | |
4716 | return -EOPNOTSUPP; | |
408f22e8 | 4717 | if (len < sizeof(int)) |
1da177e4 | 4718 | return -EINVAL; |
408f22e8 NH |
4719 | len = sizeof(int); |
4720 | if (put_user(len, optlen)) | |
4721 | return -EFAULT; | |
4722 | if (copy_to_user(optval, &sctp_sk(sk)->autoclose, sizeof(int))) | |
1da177e4 LT |
4723 | return -EFAULT; |
4724 | return 0; | |
4725 | } | |
4726 | ||
4727 | /* Helper routine to branch off an association to a new socket. */ | |
0343c554 | 4728 | int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp) |
1da177e4 | 4729 | { |
0343c554 | 4730 | struct sctp_association *asoc = sctp_id2assoc(sk, id); |
299ee123 | 4731 | struct sctp_sock *sp = sctp_sk(sk); |
1da177e4 LT |
4732 | struct socket *sock; |
4733 | int err = 0; | |
4734 | ||
0343c554 BP |
4735 | if (!asoc) |
4736 | return -EINVAL; | |
4737 | ||
1da177e4 LT |
4738 | /* An association cannot be branched off from an already peeled-off |
4739 | * socket, nor is this supported for tcp style sockets. | |
4740 | */ | |
4741 | if (!sctp_style(sk, UDP)) | |
4742 | return -EINVAL; | |
4743 | ||
4744 | /* Create a new socket. */ | |
4745 | err = sock_create(sk->sk_family, SOCK_SEQPACKET, IPPROTO_SCTP, &sock); | |
4746 | if (err < 0) | |
4747 | return err; | |
4748 | ||
914e1c8b | 4749 | sctp_copy_sock(sock->sk, sk, asoc); |
4f444308 VY |
4750 | |
4751 | /* Make peeled-off sockets more like 1-1 accepted sockets. | |
4752 | * Set the daddr and initialize id to something more random | |
4753 | */ | |
299ee123 | 4754 | sp->pf->to_sk_daddr(&asoc->peer.primary_addr, sk); |
914e1c8b VY |
4755 | |
4756 | /* Populate the fields of the newsk from the oldsk and migrate the | |
4757 | * asoc to the newsk. | |
4758 | */ | |
4759 | sctp_sock_migrate(sk, sock->sk, asoc, SCTP_SOCKET_UDP_HIGH_BANDWIDTH); | |
4f444308 | 4760 | |
1da177e4 LT |
4761 | *sockp = sock; |
4762 | ||
4763 | return err; | |
4764 | } | |
0343c554 | 4765 | EXPORT_SYMBOL(sctp_do_peeloff); |
1da177e4 LT |
4766 | |
4767 | static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval, int __user *optlen) | |
4768 | { | |
4769 | sctp_peeloff_arg_t peeloff; | |
4770 | struct socket *newsock; | |
56b31d1c | 4771 | struct file *newfile; |
1da177e4 | 4772 | int retval = 0; |
1da177e4 | 4773 | |
408f22e8 | 4774 | if (len < sizeof(sctp_peeloff_arg_t)) |
1da177e4 | 4775 | return -EINVAL; |
408f22e8 | 4776 | len = sizeof(sctp_peeloff_arg_t); |
1da177e4 LT |
4777 | if (copy_from_user(&peeloff, optval, len)) |
4778 | return -EFAULT; | |
4779 | ||
0343c554 | 4780 | retval = sctp_do_peeloff(sk, peeloff.associd, &newsock); |
1da177e4 LT |
4781 | if (retval < 0) |
4782 | goto out; | |
4783 | ||
4784 | /* Map the socket to an unused fd that can be returned to the user. */ | |
8a59bd3e | 4785 | retval = get_unused_fd_flags(0); |
1da177e4 LT |
4786 | if (retval < 0) { |
4787 | sock_release(newsock); | |
4788 | goto out; | |
4789 | } | |
4790 | ||
aab174f0 | 4791 | newfile = sock_alloc_file(newsock, 0, NULL); |
b5ffe634 | 4792 | if (IS_ERR(newfile)) { |
56b31d1c AV |
4793 | put_unused_fd(retval); |
4794 | sock_release(newsock); | |
4795 | return PTR_ERR(newfile); | |
4796 | } | |
4797 | ||
bb33381d DB |
4798 | pr_debug("%s: sk:%p, newsk:%p, sd:%d\n", __func__, sk, newsock->sk, |
4799 | retval); | |
1da177e4 LT |
4800 | |
4801 | /* Return the fd mapped to the new socket. */ | |
56b31d1c AV |
4802 | if (put_user(len, optlen)) { |
4803 | fput(newfile); | |
4804 | put_unused_fd(retval); | |
4805 | return -EFAULT; | |
4806 | } | |
1da177e4 | 4807 | peeloff.sd = retval; |
56b31d1c AV |
4808 | if (copy_to_user(optval, &peeloff, len)) { |
4809 | fput(newfile); | |
4810 | put_unused_fd(retval); | |
408f22e8 | 4811 | return -EFAULT; |
56b31d1c AV |
4812 | } |
4813 | fd_install(retval, newfile); | |
1da177e4 LT |
4814 | out: |
4815 | return retval; | |
4816 | } | |
4817 | ||
4818 | /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS) | |
4819 | * | |
4820 | * Applications can enable or disable heartbeats for any peer address of | |
4821 | * an association, modify an address's heartbeat interval, force a | |
4822 | * heartbeat to be sent immediately, and adjust the address's maximum | |
4823 | * number of retransmissions sent before an address is considered | |
4824 | * unreachable. The following structure is used to access and modify an | |
4825 | * address's parameters: | |
4826 | * | |
4827 | * struct sctp_paddrparams { | |
52ccb8e9 FF |
4828 | * sctp_assoc_t spp_assoc_id; |
4829 | * struct sockaddr_storage spp_address; | |
4830 | * uint32_t spp_hbinterval; | |
4831 | * uint16_t spp_pathmaxrxt; | |
4832 | * uint32_t spp_pathmtu; | |
4833 | * uint32_t spp_sackdelay; | |
4834 | * uint32_t spp_flags; | |
4835 | * }; | |
4836 | * | |
4837 | * spp_assoc_id - (one-to-many style socket) This is filled in the | |
4838 | * application, and identifies the association for | |
4839 | * this query. | |
1da177e4 LT |
4840 | * spp_address - This specifies which address is of interest. |
4841 | * spp_hbinterval - This contains the value of the heartbeat interval, | |
52ccb8e9 FF |
4842 | * in milliseconds. If a value of zero |
4843 | * is present in this field then no changes are to | |
4844 | * be made to this parameter. | |
1da177e4 LT |
4845 | * spp_pathmaxrxt - This contains the maximum number of |
4846 | * retransmissions before this address shall be | |
52ccb8e9 FF |
4847 | * considered unreachable. If a value of zero |
4848 | * is present in this field then no changes are to | |
4849 | * be made to this parameter. | |
4850 | * spp_pathmtu - When Path MTU discovery is disabled the value | |
4851 | * specified here will be the "fixed" path mtu. | |
4852 | * Note that if the spp_address field is empty | |
4853 | * then all associations on this address will | |
4854 | * have this fixed path mtu set upon them. | |
4855 | * | |
4856 | * spp_sackdelay - When delayed sack is enabled, this value specifies | |
4857 | * the number of milliseconds that sacks will be delayed | |
4858 | * for. This value will apply to all addresses of an | |
4859 | * association if the spp_address field is empty. Note | |
4860 | * also, that if delayed sack is enabled and this | |
4861 | * value is set to 0, no change is made to the last | |
4862 | * recorded delayed sack timer value. | |
4863 | * | |
4864 | * spp_flags - These flags are used to control various features | |
4865 | * on an association. The flag field may contain | |
4866 | * zero or more of the following options. | |
4867 | * | |
4868 | * SPP_HB_ENABLE - Enable heartbeats on the | |
4869 | * specified address. Note that if the address | |
4870 | * field is empty all addresses for the association | |
4871 | * have heartbeats enabled upon them. | |
4872 | * | |
4873 | * SPP_HB_DISABLE - Disable heartbeats on the | |
4874 | * speicifed address. Note that if the address | |
4875 | * field is empty all addresses for the association | |
4876 | * will have their heartbeats disabled. Note also | |
4877 | * that SPP_HB_ENABLE and SPP_HB_DISABLE are | |
4878 | * mutually exclusive, only one of these two should | |
4879 | * be specified. Enabling both fields will have | |
4880 | * undetermined results. | |
4881 | * | |
4882 | * SPP_HB_DEMAND - Request a user initiated heartbeat | |
4883 | * to be made immediately. | |
4884 | * | |
4885 | * SPP_PMTUD_ENABLE - This field will enable PMTU | |
4886 | * discovery upon the specified address. Note that | |
4887 | * if the address feild is empty then all addresses | |
4888 | * on the association are effected. | |
4889 | * | |
4890 | * SPP_PMTUD_DISABLE - This field will disable PMTU | |
4891 | * discovery upon the specified address. Note that | |
4892 | * if the address feild is empty then all addresses | |
4893 | * on the association are effected. Not also that | |
4894 | * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually | |
4895 | * exclusive. Enabling both will have undetermined | |
4896 | * results. | |
4897 | * | |
4898 | * SPP_SACKDELAY_ENABLE - Setting this flag turns | |
4899 | * on delayed sack. The time specified in spp_sackdelay | |
4900 | * is used to specify the sack delay for this address. Note | |
4901 | * that if spp_address is empty then all addresses will | |
4902 | * enable delayed sack and take on the sack delay | |
4903 | * value specified in spp_sackdelay. | |
4904 | * SPP_SACKDELAY_DISABLE - Setting this flag turns | |
4905 | * off delayed sack. If the spp_address field is blank then | |
4906 | * delayed sack is disabled for the entire association. Note | |
4907 | * also that this field is mutually exclusive to | |
4908 | * SPP_SACKDELAY_ENABLE, setting both will have undefined | |
4909 | * results. | |
1da177e4 LT |
4910 | */ |
4911 | static int sctp_getsockopt_peer_addr_params(struct sock *sk, int len, | |
52ccb8e9 | 4912 | char __user *optval, int __user *optlen) |
1da177e4 | 4913 | { |
52ccb8e9 FF |
4914 | struct sctp_paddrparams params; |
4915 | struct sctp_transport *trans = NULL; | |
4916 | struct sctp_association *asoc = NULL; | |
4917 | struct sctp_sock *sp = sctp_sk(sk); | |
1da177e4 | 4918 | |
408f22e8 | 4919 | if (len < sizeof(struct sctp_paddrparams)) |
1da177e4 | 4920 | return -EINVAL; |
408f22e8 | 4921 | len = sizeof(struct sctp_paddrparams); |
1da177e4 LT |
4922 | if (copy_from_user(¶ms, optval, len)) |
4923 | return -EFAULT; | |
4924 | ||
52ccb8e9 FF |
4925 | /* If an address other than INADDR_ANY is specified, and |
4926 | * no transport is found, then the request is invalid. | |
1da177e4 | 4927 | */ |
cb3f837b | 4928 | if (!sctp_is_any(sk, (union sctp_addr *)¶ms.spp_address)) { |
52ccb8e9 FF |
4929 | trans = sctp_addr_id2transport(sk, ¶ms.spp_address, |
4930 | params.spp_assoc_id); | |
4931 | if (!trans) { | |
bb33381d | 4932 | pr_debug("%s: failed no transport\n", __func__); |
52ccb8e9 FF |
4933 | return -EINVAL; |
4934 | } | |
1da177e4 LT |
4935 | } |
4936 | ||
52ccb8e9 FF |
4937 | /* Get association, if assoc_id != 0 and the socket is a one |
4938 | * to many style socket, and an association was not found, then | |
4939 | * the id was invalid. | |
4940 | */ | |
4941 | asoc = sctp_id2assoc(sk, params.spp_assoc_id); | |
4942 | if (!asoc && params.spp_assoc_id && sctp_style(sk, UDP)) { | |
bb33381d | 4943 | pr_debug("%s: failed no association\n", __func__); |
1da177e4 | 4944 | return -EINVAL; |
52ccb8e9 | 4945 | } |
1da177e4 | 4946 | |
52ccb8e9 FF |
4947 | if (trans) { |
4948 | /* Fetch transport values. */ | |
4949 | params.spp_hbinterval = jiffies_to_msecs(trans->hbinterval); | |
4950 | params.spp_pathmtu = trans->pathmtu; | |
4951 | params.spp_pathmaxrxt = trans->pathmaxrxt; | |
4952 | params.spp_sackdelay = jiffies_to_msecs(trans->sackdelay); | |
4953 | ||
4954 | /*draft-11 doesn't say what to return in spp_flags*/ | |
4955 | params.spp_flags = trans->param_flags; | |
4956 | } else if (asoc) { | |
4957 | /* Fetch association values. */ | |
4958 | params.spp_hbinterval = jiffies_to_msecs(asoc->hbinterval); | |
4959 | params.spp_pathmtu = asoc->pathmtu; | |
4960 | params.spp_pathmaxrxt = asoc->pathmaxrxt; | |
4961 | params.spp_sackdelay = jiffies_to_msecs(asoc->sackdelay); | |
4962 | ||
4963 | /*draft-11 doesn't say what to return in spp_flags*/ | |
4964 | params.spp_flags = asoc->param_flags; | |
4965 | } else { | |
4966 | /* Fetch socket values. */ | |
4967 | params.spp_hbinterval = sp->hbinterval; | |
4968 | params.spp_pathmtu = sp->pathmtu; | |
4969 | params.spp_sackdelay = sp->sackdelay; | |
4970 | params.spp_pathmaxrxt = sp->pathmaxrxt; | |
1da177e4 | 4971 | |
52ccb8e9 FF |
4972 | /*draft-11 doesn't say what to return in spp_flags*/ |
4973 | params.spp_flags = sp->param_flags; | |
4974 | } | |
1da177e4 | 4975 | |
1da177e4 LT |
4976 | if (copy_to_user(optval, ¶ms, len)) |
4977 | return -EFAULT; | |
4978 | ||
4979 | if (put_user(len, optlen)) | |
4980 | return -EFAULT; | |
4981 | ||
4982 | return 0; | |
4983 | } | |
4984 | ||
d364d927 WY |
4985 | /* |
4986 | * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK) | |
4987 | * | |
4988 | * This option will effect the way delayed acks are performed. This | |
4989 | * option allows you to get or set the delayed ack time, in | |
4990 | * milliseconds. It also allows changing the delayed ack frequency. | |
4991 | * Changing the frequency to 1 disables the delayed sack algorithm. If | |
4992 | * the assoc_id is 0, then this sets or gets the endpoints default | |
4993 | * values. If the assoc_id field is non-zero, then the set or get | |
4994 | * effects the specified association for the one to many model (the | |
4995 | * assoc_id field is ignored by the one to one model). Note that if | |
4996 | * sack_delay or sack_freq are 0 when setting this option, then the | |
4997 | * current values will remain unchanged. | |
4998 | * | |
4999 | * struct sctp_sack_info { | |
5000 | * sctp_assoc_t sack_assoc_id; | |
5001 | * uint32_t sack_delay; | |
5002 | * uint32_t sack_freq; | |
5003 | * }; | |
7708610b | 5004 | * |
d364d927 WY |
5005 | * sack_assoc_id - This parameter, indicates which association the user |
5006 | * is performing an action upon. Note that if this field's value is | |
5007 | * zero then the endpoints default value is changed (effecting future | |
5008 | * associations only). | |
7708610b | 5009 | * |
d364d927 WY |
5010 | * sack_delay - This parameter contains the number of milliseconds that |
5011 | * the user is requesting the delayed ACK timer be set to. Note that | |
5012 | * this value is defined in the standard to be between 200 and 500 | |
5013 | * milliseconds. | |
7708610b | 5014 | * |
d364d927 WY |
5015 | * sack_freq - This parameter contains the number of packets that must |
5016 | * be received before a sack is sent without waiting for the delay | |
5017 | * timer to expire. The default value for this is 2, setting this | |
5018 | * value to 1 will disable the delayed sack algorithm. | |
7708610b | 5019 | */ |
d364d927 | 5020 | static int sctp_getsockopt_delayed_ack(struct sock *sk, int len, |
7708610b FF |
5021 | char __user *optval, |
5022 | int __user *optlen) | |
5023 | { | |
d364d927 | 5024 | struct sctp_sack_info params; |
7708610b FF |
5025 | struct sctp_association *asoc = NULL; |
5026 | struct sctp_sock *sp = sctp_sk(sk); | |
5027 | ||
d364d927 WY |
5028 | if (len >= sizeof(struct sctp_sack_info)) { |
5029 | len = sizeof(struct sctp_sack_info); | |
7708610b | 5030 | |
d364d927 WY |
5031 | if (copy_from_user(¶ms, optval, len)) |
5032 | return -EFAULT; | |
5033 | } else if (len == sizeof(struct sctp_assoc_value)) { | |
94f65193 | 5034 | pr_warn_ratelimited(DEPRECATED |
f916ec96 | 5035 | "%s (pid %d) " |
94f65193 | 5036 | "Use of struct sctp_assoc_value in delayed_ack socket option.\n" |
f916ec96 NH |
5037 | "Use struct sctp_sack_info instead\n", |
5038 | current->comm, task_pid_nr(current)); | |
d364d927 WY |
5039 | if (copy_from_user(¶ms, optval, len)) |
5040 | return -EFAULT; | |
5041 | } else | |
cb3f837b | 5042 | return -EINVAL; |
7708610b | 5043 | |
d364d927 | 5044 | /* Get association, if sack_assoc_id != 0 and the socket is a one |
7708610b FF |
5045 | * to many style socket, and an association was not found, then |
5046 | * the id was invalid. | |
d808ad9a | 5047 | */ |
d364d927 WY |
5048 | asoc = sctp_id2assoc(sk, params.sack_assoc_id); |
5049 | if (!asoc && params.sack_assoc_id && sctp_style(sk, UDP)) | |
7708610b FF |
5050 | return -EINVAL; |
5051 | ||
5052 | if (asoc) { | |
5053 | /* Fetch association values. */ | |
d364d927 WY |
5054 | if (asoc->param_flags & SPP_SACKDELAY_ENABLE) { |
5055 | params.sack_delay = jiffies_to_msecs( | |
7708610b | 5056 | asoc->sackdelay); |
d364d927 WY |
5057 | params.sack_freq = asoc->sackfreq; |
5058 | ||
5059 | } else { | |
5060 | params.sack_delay = 0; | |
5061 | params.sack_freq = 1; | |
5062 | } | |
7708610b FF |
5063 | } else { |
5064 | /* Fetch socket values. */ | |
d364d927 WY |
5065 | if (sp->param_flags & SPP_SACKDELAY_ENABLE) { |
5066 | params.sack_delay = sp->sackdelay; | |
5067 | params.sack_freq = sp->sackfreq; | |
5068 | } else { | |
5069 | params.sack_delay = 0; | |
5070 | params.sack_freq = 1; | |
5071 | } | |
7708610b FF |
5072 | } |
5073 | ||
5074 | if (copy_to_user(optval, ¶ms, len)) | |
5075 | return -EFAULT; | |
5076 | ||
5077 | if (put_user(len, optlen)) | |
5078 | return -EFAULT; | |
5079 | ||
5080 | return 0; | |
5081 | } | |
5082 | ||
1da177e4 LT |
5083 | /* 7.1.3 Initialization Parameters (SCTP_INITMSG) |
5084 | * | |
5085 | * Applications can specify protocol parameters for the default association | |
5086 | * initialization. The option name argument to setsockopt() and getsockopt() | |
5087 | * is SCTP_INITMSG. | |
5088 | * | |
5089 | * Setting initialization parameters is effective only on an unconnected | |
5090 | * socket (for UDP-style sockets only future associations are effected | |
5091 | * by the change). With TCP-style sockets, this option is inherited by | |
5092 | * sockets derived from a listener socket. | |
5093 | */ | |
5094 | static int sctp_getsockopt_initmsg(struct sock *sk, int len, char __user *optval, int __user *optlen) | |
5095 | { | |
408f22e8 | 5096 | if (len < sizeof(struct sctp_initmsg)) |
1da177e4 | 5097 | return -EINVAL; |
408f22e8 NH |
5098 | len = sizeof(struct sctp_initmsg); |
5099 | if (put_user(len, optlen)) | |
5100 | return -EFAULT; | |
1da177e4 LT |
5101 | if (copy_to_user(optval, &sctp_sk(sk)->initmsg, len)) |
5102 | return -EFAULT; | |
5103 | return 0; | |
5104 | } | |
5105 | ||