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60c778b2 | 1 | /* SCTP kernel implementation |
1da177e4 LT |
2 | * (C) Copyright IBM Corp. 2001, 2004 |
3 | * Copyright (c) 1999-2000 Cisco, Inc. | |
4 | * Copyright (c) 1999-2001 Motorola, Inc. | |
5 | * Copyright (c) 2001-2003 Intel Corp. | |
6 | * Copyright (c) 2001-2002 Nokia, Inc. | |
7 | * Copyright (c) 2001 La Monte H.P. Yarroll | |
8 | * | |
60c778b2 | 9 | * This file is part of the SCTP kernel implementation |
1da177e4 LT |
10 | * |
11 | * These functions interface with the sockets layer to implement the | |
12 | * SCTP Extensions for the Sockets API. | |
13 | * | |
14 | * Note that the descriptions from the specification are USER level | |
15 | * functions--this file is the functions which populate the struct proto | |
16 | * for SCTP which is the BOTTOM of the sockets interface. | |
17 | * | |
60c778b2 | 18 | * This SCTP implementation is free software; |
1da177e4 LT |
19 | * you can redistribute it and/or modify it under the terms of |
20 | * the GNU General Public License as published by | |
21 | * the Free Software Foundation; either version 2, or (at your option) | |
22 | * any later version. | |
23 | * | |
60c778b2 | 24 | * This SCTP implementation is distributed in the hope that it |
1da177e4 LT |
25 | * will be useful, but WITHOUT ANY WARRANTY; without even the implied |
26 | * ************************ | |
27 | * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
28 | * See the GNU General Public License for more details. | |
29 | * | |
30 | * You should have received a copy of the GNU General Public License | |
4b2f13a2 JK |
31 | * along with GNU CC; see the file COPYING. If not, see |
32 | * <http://www.gnu.org/licenses/>. | |
1da177e4 LT |
33 | * |
34 | * Please send any bug reports or fixes you make to the | |
35 | * email address(es): | |
91705c61 | 36 | * lksctp developers <linux-sctp@vger.kernel.org> |
1da177e4 | 37 | * |
1da177e4 LT |
38 | * Written or modified by: |
39 | * La Monte H.P. Yarroll <piggy@acm.org> | |
40 | * Narasimha Budihal <narsi@refcode.org> | |
41 | * Karl Knutson <karl@athena.chicago.il.us> | |
42 | * Jon Grimm <jgrimm@us.ibm.com> | |
43 | * Xingang Guo <xingang.guo@intel.com> | |
44 | * Daisy Chang <daisyc@us.ibm.com> | |
45 | * Sridhar Samudrala <samudrala@us.ibm.com> | |
46 | * Inaky Perez-Gonzalez <inaky.gonzalez@intel.com> | |
47 | * Ardelle Fan <ardelle.fan@intel.com> | |
48 | * Ryan Layer <rmlayer@us.ibm.com> | |
49 | * Anup Pemmaiah <pemmaiah@cc.usu.edu> | |
50 | * Kevin Gao <kevin.gao@intel.com> | |
1da177e4 LT |
51 | */ |
52 | ||
145ce502 JP |
53 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
54 | ||
5821c769 | 55 | #include <crypto/hash.h> |
1da177e4 LT |
56 | #include <linux/types.h> |
57 | #include <linux/kernel.h> | |
58 | #include <linux/wait.h> | |
59 | #include <linux/time.h> | |
3f07c014 | 60 | #include <linux/sched/signal.h> |
1da177e4 | 61 | #include <linux/ip.h> |
4fc268d2 | 62 | #include <linux/capability.h> |
1da177e4 LT |
63 | #include <linux/fcntl.h> |
64 | #include <linux/poll.h> | |
65 | #include <linux/init.h> | |
5a0e3ad6 | 66 | #include <linux/slab.h> |
56b31d1c | 67 | #include <linux/file.h> |
ffd59393 | 68 | #include <linux/compat.h> |
0eb71a9d | 69 | #include <linux/rhashtable.h> |
1da177e4 LT |
70 | |
71 | #include <net/ip.h> | |
72 | #include <net/icmp.h> | |
73 | #include <net/route.h> | |
74 | #include <net/ipv6.h> | |
75 | #include <net/inet_common.h> | |
8465a5fc | 76 | #include <net/busy_poll.h> |
1da177e4 LT |
77 | |
78 | #include <linux/socket.h> /* for sa_family_t */ | |
bc3b2d7f | 79 | #include <linux/export.h> |
1da177e4 LT |
80 | #include <net/sock.h> |
81 | #include <net/sctp/sctp.h> | |
82 | #include <net/sctp/sm.h> | |
13aa8770 | 83 | #include <net/sctp/stream_sched.h> |
1da177e4 | 84 | |
1da177e4 | 85 | /* Forward declarations for internal helper functions. */ |
cd305c74 | 86 | static bool sctp_writeable(struct sock *sk); |
1da177e4 | 87 | static void sctp_wfree(struct sk_buff *skb); |
cea0cc80 | 88 | static int sctp_wait_for_sndbuf(struct sctp_association *asoc, long *timeo_p, |
a0ff6600 | 89 | size_t msg_len); |
26ac8e5f | 90 | static int sctp_wait_for_packet(struct sock *sk, int *err, long *timeo_p); |
1da177e4 LT |
91 | static int sctp_wait_for_connect(struct sctp_association *, long *timeo_p); |
92 | static int sctp_wait_for_accept(struct sock *sk, long timeo); | |
93 | static void sctp_wait_for_close(struct sock *sk, long timeo); | |
0a2fbac1 | 94 | static void sctp_destruct_sock(struct sock *sk); |
1da177e4 LT |
95 | static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt, |
96 | union sctp_addr *addr, int len); | |
97 | static int sctp_bindx_add(struct sock *, struct sockaddr *, int); | |
98 | static int sctp_bindx_rem(struct sock *, struct sockaddr *, int); | |
99 | static int sctp_send_asconf_add_ip(struct sock *, struct sockaddr *, int); | |
100 | static int sctp_send_asconf_del_ip(struct sock *, struct sockaddr *, int); | |
101 | static int sctp_send_asconf(struct sctp_association *asoc, | |
102 | struct sctp_chunk *chunk); | |
103 | static int sctp_do_bind(struct sock *, union sctp_addr *, int); | |
104 | static int sctp_autobind(struct sock *sk); | |
b7ef2618 XL |
105 | static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk, |
106 | struct sctp_association *assoc, | |
107 | enum sctp_socket_type type); | |
1da177e4 | 108 | |
06044751 | 109 | static unsigned long sctp_memory_pressure; |
8d987e5c | 110 | static atomic_long_t sctp_memory_allocated; |
1748376b | 111 | struct percpu_counter sctp_sockets_allocated; |
4d93df0a | 112 | |
5c52ba17 | 113 | static void sctp_enter_memory_pressure(struct sock *sk) |
4d93df0a NH |
114 | { |
115 | sctp_memory_pressure = 1; | |
116 | } | |
117 | ||
118 | ||
1da177e4 LT |
119 | /* Get the sndbuf space available at the time on the association. */ |
120 | static inline int sctp_wspace(struct sctp_association *asoc) | |
121 | { | |
cd305c74 | 122 | struct sock *sk = asoc->base.sk; |
1da177e4 | 123 | |
cd305c74 XL |
124 | return asoc->ep->sndbuf_policy ? sk->sk_sndbuf - asoc->sndbuf_used |
125 | : sk_stream_wspace(sk); | |
1da177e4 LT |
126 | } |
127 | ||
128 | /* Increment the used sndbuf space count of the corresponding association by | |
129 | * the size of the outgoing data chunk. | |
130 | * Also, set the skb destructor for sndbuf accounting later. | |
131 | * | |
132 | * Since it is always 1-1 between chunk and skb, and also a new skb is always | |
133 | * allocated for chunk bundling in sctp_packet_transmit(), we can use the | |
134 | * destructor in the data chunk skb for the purpose of the sndbuf space | |
135 | * tracking. | |
136 | */ | |
137 | static inline void sctp_set_owner_w(struct sctp_chunk *chunk) | |
138 | { | |
139 | struct sctp_association *asoc = chunk->asoc; | |
140 | struct sock *sk = asoc->base.sk; | |
141 | ||
142 | /* The sndbuf space is tracked per association. */ | |
143 | sctp_association_hold(asoc); | |
144 | ||
1b1e0bc9 XL |
145 | if (chunk->shkey) |
146 | sctp_auth_shkey_hold(chunk->shkey); | |
147 | ||
4eb701df NH |
148 | skb_set_owner_w(chunk->skb, sk); |
149 | ||
1da177e4 LT |
150 | chunk->skb->destructor = sctp_wfree; |
151 | /* Save the chunk pointer in skb for sctp_wfree to use later. */ | |
f869c912 | 152 | skb_shinfo(chunk->skb)->destructor_arg = chunk; |
1da177e4 | 153 | |
14afee4b | 154 | refcount_add(sizeof(struct sctp_chunk), &sk->sk_wmem_alloc); |
605c0ac1 XL |
155 | asoc->sndbuf_used += chunk->skb->truesize + sizeof(struct sctp_chunk); |
156 | sk->sk_wmem_queued += chunk->skb->truesize + sizeof(struct sctp_chunk); | |
3ab224be | 157 | sk_mem_charge(sk, chunk->skb->truesize); |
1da177e4 LT |
158 | } |
159 | ||
d04adf1b XL |
160 | static void sctp_clear_owner_w(struct sctp_chunk *chunk) |
161 | { | |
162 | skb_orphan(chunk->skb); | |
163 | } | |
164 | ||
165 | static void sctp_for_each_tx_datachunk(struct sctp_association *asoc, | |
166 | void (*cb)(struct sctp_chunk *)) | |
167 | ||
168 | { | |
169 | struct sctp_outq *q = &asoc->outqueue; | |
170 | struct sctp_transport *t; | |
171 | struct sctp_chunk *chunk; | |
172 | ||
173 | list_for_each_entry(t, &asoc->peer.transport_addr_list, transports) | |
174 | list_for_each_entry(chunk, &t->transmitted, transmitted_list) | |
175 | cb(chunk); | |
176 | ||
a8dd3979 | 177 | list_for_each_entry(chunk, &q->retransmit, transmitted_list) |
d04adf1b XL |
178 | cb(chunk); |
179 | ||
a8dd3979 | 180 | list_for_each_entry(chunk, &q->sacked, transmitted_list) |
d04adf1b XL |
181 | cb(chunk); |
182 | ||
a8dd3979 | 183 | list_for_each_entry(chunk, &q->abandoned, transmitted_list) |
d04adf1b XL |
184 | cb(chunk); |
185 | ||
186 | list_for_each_entry(chunk, &q->out_chunk_list, list) | |
187 | cb(chunk); | |
188 | } | |
189 | ||
13228238 XL |
190 | static void sctp_for_each_rx_skb(struct sctp_association *asoc, struct sock *sk, |
191 | void (*cb)(struct sk_buff *, struct sock *)) | |
192 | ||
193 | { | |
194 | struct sk_buff *skb, *tmp; | |
195 | ||
196 | sctp_skb_for_each(skb, &asoc->ulpq.lobby, tmp) | |
197 | cb(skb, sk); | |
198 | ||
199 | sctp_skb_for_each(skb, &asoc->ulpq.reasm, tmp) | |
200 | cb(skb, sk); | |
201 | ||
202 | sctp_skb_for_each(skb, &asoc->ulpq.reasm_uo, tmp) | |
203 | cb(skb, sk); | |
204 | } | |
205 | ||
1da177e4 LT |
206 | /* Verify that this is a valid address. */ |
207 | static inline int sctp_verify_addr(struct sock *sk, union sctp_addr *addr, | |
208 | int len) | |
209 | { | |
210 | struct sctp_af *af; | |
211 | ||
212 | /* Verify basic sockaddr. */ | |
213 | af = sctp_sockaddr_af(sctp_sk(sk), addr, len); | |
214 | if (!af) | |
215 | return -EINVAL; | |
216 | ||
217 | /* Is this a valid SCTP address? */ | |
5636bef7 | 218 | if (!af->addr_valid(addr, sctp_sk(sk), NULL)) |
1da177e4 LT |
219 | return -EINVAL; |
220 | ||
221 | if (!sctp_sk(sk)->pf->send_verify(sctp_sk(sk), (addr))) | |
222 | return -EINVAL; | |
223 | ||
224 | return 0; | |
225 | } | |
226 | ||
227 | /* Look up the association by its id. If this is not a UDP-style | |
228 | * socket, the ID field is always ignored. | |
229 | */ | |
230 | struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id) | |
231 | { | |
232 | struct sctp_association *asoc = NULL; | |
233 | ||
234 | /* If this is not a UDP-style socket, assoc id should be ignored. */ | |
235 | if (!sctp_style(sk, UDP)) { | |
236 | /* Return NULL if the socket state is not ESTABLISHED. It | |
237 | * could be a TCP-style listening socket or a socket which | |
238 | * hasn't yet called connect() to establish an association. | |
239 | */ | |
e5b13f34 | 240 | if (!sctp_sstate(sk, ESTABLISHED) && !sctp_sstate(sk, CLOSING)) |
1da177e4 LT |
241 | return NULL; |
242 | ||
243 | /* Get the first and the only association from the list. */ | |
244 | if (!list_empty(&sctp_sk(sk)->ep->asocs)) | |
245 | asoc = list_entry(sctp_sk(sk)->ep->asocs.next, | |
246 | struct sctp_association, asocs); | |
247 | return asoc; | |
248 | } | |
249 | ||
250 | /* Otherwise this is a UDP-style socket. */ | |
251 | if (!id || (id == (sctp_assoc_t)-1)) | |
252 | return NULL; | |
253 | ||
254 | spin_lock_bh(&sctp_assocs_id_lock); | |
255 | asoc = (struct sctp_association *)idr_find(&sctp_assocs_id, (int)id); | |
b336deca MRL |
256 | if (asoc && (asoc->base.sk != sk || asoc->base.dead)) |
257 | asoc = NULL; | |
1da177e4 LT |
258 | spin_unlock_bh(&sctp_assocs_id_lock); |
259 | ||
1da177e4 LT |
260 | return asoc; |
261 | } | |
262 | ||
263 | /* Look up the transport from an address and an assoc id. If both address and | |
264 | * id are specified, the associations matching the address and the id should be | |
265 | * the same. | |
266 | */ | |
267 | static struct sctp_transport *sctp_addr_id2transport(struct sock *sk, | |
268 | struct sockaddr_storage *addr, | |
269 | sctp_assoc_t id) | |
270 | { | |
271 | struct sctp_association *addr_asoc = NULL, *id_asoc = NULL; | |
6f29a130 | 272 | struct sctp_af *af = sctp_get_af_specific(addr->ss_family); |
1da177e4 | 273 | union sctp_addr *laddr = (union sctp_addr *)addr; |
6f29a130 XL |
274 | struct sctp_transport *transport; |
275 | ||
912964ea | 276 | if (!af || sctp_verify_addr(sk, laddr, af->sockaddr_len)) |
6f29a130 | 277 | return NULL; |
1da177e4 | 278 | |
1da177e4 | 279 | addr_asoc = sctp_endpoint_lookup_assoc(sctp_sk(sk)->ep, |
cd4ff034 | 280 | laddr, |
1da177e4 | 281 | &transport); |
1da177e4 LT |
282 | |
283 | if (!addr_asoc) | |
284 | return NULL; | |
285 | ||
286 | id_asoc = sctp_id2assoc(sk, id); | |
287 | if (id_asoc && (id_asoc != addr_asoc)) | |
288 | return NULL; | |
289 | ||
299ee123 | 290 | sctp_get_pf_specific(sk->sk_family)->addr_to_user(sctp_sk(sk), |
1da177e4 LT |
291 | (union sctp_addr *)addr); |
292 | ||
293 | return transport; | |
294 | } | |
295 | ||
296 | /* API 3.1.2 bind() - UDP Style Syntax | |
297 | * The syntax of bind() is, | |
298 | * | |
299 | * ret = bind(int sd, struct sockaddr *addr, int addrlen); | |
300 | * | |
301 | * sd - the socket descriptor returned by socket(). | |
302 | * addr - the address structure (struct sockaddr_in or struct | |
303 | * sockaddr_in6 [RFC 2553]), | |
304 | * addr_len - the size of the address structure. | |
305 | */ | |
dda91928 | 306 | static int sctp_bind(struct sock *sk, struct sockaddr *addr, int addr_len) |
1da177e4 LT |
307 | { |
308 | int retval = 0; | |
309 | ||
048ed4b6 | 310 | lock_sock(sk); |
1da177e4 | 311 | |
bb33381d DB |
312 | pr_debug("%s: sk:%p, addr:%p, addr_len:%d\n", __func__, sk, |
313 | addr, addr_len); | |
1da177e4 LT |
314 | |
315 | /* Disallow binding twice. */ | |
316 | if (!sctp_sk(sk)->ep->base.bind_addr.port) | |
3f7a87d2 | 317 | retval = sctp_do_bind(sk, (union sctp_addr *)addr, |
1da177e4 LT |
318 | addr_len); |
319 | else | |
320 | retval = -EINVAL; | |
321 | ||
048ed4b6 | 322 | release_sock(sk); |
1da177e4 LT |
323 | |
324 | return retval; | |
325 | } | |
326 | ||
327 | static long sctp_get_port_local(struct sock *, union sctp_addr *); | |
328 | ||
329 | /* Verify this is a valid sockaddr. */ | |
330 | static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt, | |
331 | union sctp_addr *addr, int len) | |
332 | { | |
333 | struct sctp_af *af; | |
334 | ||
335 | /* Check minimum size. */ | |
336 | if (len < sizeof (struct sockaddr)) | |
337 | return NULL; | |
338 | ||
c5006b8a XL |
339 | if (!opt->pf->af_supported(addr->sa.sa_family, opt)) |
340 | return NULL; | |
341 | ||
81e98370 ED |
342 | if (addr->sa.sa_family == AF_INET6) { |
343 | if (len < SIN6_LEN_RFC2133) | |
344 | return NULL; | |
345 | /* V4 mapped address are really of AF_INET family */ | |
346 | if (ipv6_addr_v4mapped(&addr->v6.sin6_addr) && | |
347 | !opt->pf->af_supported(AF_INET, opt)) | |
348 | return NULL; | |
349 | } | |
1da177e4 LT |
350 | |
351 | /* If we get this far, af is valid. */ | |
352 | af = sctp_get_af_specific(addr->sa.sa_family); | |
353 | ||
354 | if (len < af->sockaddr_len) | |
355 | return NULL; | |
356 | ||
357 | return af; | |
358 | } | |
359 | ||
360 | /* Bind a local address either to an endpoint or to an association. */ | |
dda91928 | 361 | static int sctp_do_bind(struct sock *sk, union sctp_addr *addr, int len) |
1da177e4 | 362 | { |
3594698a | 363 | struct net *net = sock_net(sk); |
1da177e4 LT |
364 | struct sctp_sock *sp = sctp_sk(sk); |
365 | struct sctp_endpoint *ep = sp->ep; | |
366 | struct sctp_bind_addr *bp = &ep->base.bind_addr; | |
367 | struct sctp_af *af; | |
368 | unsigned short snum; | |
369 | int ret = 0; | |
370 | ||
1da177e4 LT |
371 | /* Common sockaddr verification. */ |
372 | af = sctp_sockaddr_af(sp, addr, len); | |
3f7a87d2 | 373 | if (!af) { |
bb33381d DB |
374 | pr_debug("%s: sk:%p, newaddr:%p, len:%d EINVAL\n", |
375 | __func__, sk, addr, len); | |
1da177e4 | 376 | return -EINVAL; |
3f7a87d2 FF |
377 | } |
378 | ||
379 | snum = ntohs(addr->v4.sin_port); | |
380 | ||
bb33381d DB |
381 | pr_debug("%s: sk:%p, new addr:%pISc, port:%d, new port:%d, len:%d\n", |
382 | __func__, sk, &addr->sa, bp->port, snum, len); | |
1da177e4 LT |
383 | |
384 | /* PF specific bind() address verification. */ | |
385 | if (!sp->pf->bind_verify(sp, addr)) | |
386 | return -EADDRNOTAVAIL; | |
387 | ||
8b358056 VY |
388 | /* We must either be unbound, or bind to the same port. |
389 | * It's OK to allow 0 ports if we are already bound. | |
390 | * We'll just inhert an already bound port in this case | |
391 | */ | |
392 | if (bp->port) { | |
393 | if (!snum) | |
394 | snum = bp->port; | |
395 | else if (snum != bp->port) { | |
bb33381d DB |
396 | pr_debug("%s: new port %d doesn't match existing port " |
397 | "%d\n", __func__, snum, bp->port); | |
8b358056 VY |
398 | return -EINVAL; |
399 | } | |
1da177e4 LT |
400 | } |
401 | ||
4548b683 | 402 | if (snum && snum < inet_prot_sock(net) && |
3594698a | 403 | !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE)) |
1da177e4 LT |
404 | return -EACCES; |
405 | ||
4e54064e VY |
406 | /* See if the address matches any of the addresses we may have |
407 | * already bound before checking against other endpoints. | |
408 | */ | |
409 | if (sctp_bind_addr_match(bp, addr, sp)) | |
410 | return -EINVAL; | |
411 | ||
1da177e4 LT |
412 | /* Make sure we are allowed to bind here. |
413 | * The function sctp_get_port_local() does duplicate address | |
414 | * detection. | |
415 | */ | |
2772b495 | 416 | addr->v4.sin_port = htons(snum); |
1da177e4 | 417 | if ((ret = sctp_get_port_local(sk, addr))) { |
4e54064e | 418 | return -EADDRINUSE; |
1da177e4 LT |
419 | } |
420 | ||
421 | /* Refresh ephemeral port. */ | |
422 | if (!bp->port) | |
c720c7e8 | 423 | bp->port = inet_sk(sk)->inet_num; |
1da177e4 | 424 | |
559cf710 VY |
425 | /* Add the address to the bind address list. |
426 | * Use GFP_ATOMIC since BHs will be disabled. | |
427 | */ | |
133800d1 MRL |
428 | ret = sctp_add_bind_addr(bp, addr, af->sockaddr_len, |
429 | SCTP_ADDR_SRC, GFP_ATOMIC); | |
1da177e4 LT |
430 | |
431 | /* Copy back into socket for getsockname() use. */ | |
432 | if (!ret) { | |
c720c7e8 | 433 | inet_sk(sk)->inet_sport = htons(inet_sk(sk)->inet_num); |
299ee123 | 434 | sp->pf->to_sk_saddr(addr, sk); |
1da177e4 LT |
435 | } |
436 | ||
437 | return ret; | |
438 | } | |
439 | ||
440 | /* ADDIP Section 4.1.1 Congestion Control of ASCONF Chunks | |
441 | * | |
d808ad9a | 442 | * R1) One and only one ASCONF Chunk MAY be in transit and unacknowledged |
1da177e4 | 443 | * at any one time. If a sender, after sending an ASCONF chunk, decides |
d808ad9a | 444 | * it needs to transfer another ASCONF Chunk, it MUST wait until the |
1da177e4 | 445 | * ASCONF-ACK Chunk returns from the previous ASCONF Chunk before sending a |
d808ad9a YH |
446 | * subsequent ASCONF. Note this restriction binds each side, so at any |
447 | * time two ASCONF may be in-transit on any given association (one sent | |
1da177e4 LT |
448 | * from each endpoint). |
449 | */ | |
450 | static int sctp_send_asconf(struct sctp_association *asoc, | |
451 | struct sctp_chunk *chunk) | |
452 | { | |
55e26eb9 | 453 | struct net *net = sock_net(asoc->base.sk); |
1da177e4 LT |
454 | int retval = 0; |
455 | ||
456 | /* If there is an outstanding ASCONF chunk, queue it for later | |
457 | * transmission. | |
d808ad9a | 458 | */ |
1da177e4 | 459 | if (asoc->addip_last_asconf) { |
79af02c2 | 460 | list_add_tail(&chunk->list, &asoc->addip_chunk_list); |
d808ad9a | 461 | goto out; |
1da177e4 LT |
462 | } |
463 | ||
464 | /* Hold the chunk until an ASCONF_ACK is received. */ | |
465 | sctp_chunk_hold(chunk); | |
55e26eb9 | 466 | retval = sctp_primitive_ASCONF(net, asoc, chunk); |
1da177e4 LT |
467 | if (retval) |
468 | sctp_chunk_free(chunk); | |
469 | else | |
470 | asoc->addip_last_asconf = chunk; | |
471 | ||
472 | out: | |
473 | return retval; | |
474 | } | |
475 | ||
476 | /* Add a list of addresses as bind addresses to local endpoint or | |
477 | * association. | |
478 | * | |
479 | * Basically run through each address specified in the addrs/addrcnt | |
480 | * array/length pair, determine if it is IPv6 or IPv4 and call | |
481 | * sctp_do_bind() on it. | |
482 | * | |
483 | * If any of them fails, then the operation will be reversed and the | |
484 | * ones that were added will be removed. | |
485 | * | |
486 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
487 | */ | |
04675210 | 488 | static int sctp_bindx_add(struct sock *sk, struct sockaddr *addrs, int addrcnt) |
1da177e4 LT |
489 | { |
490 | int cnt; | |
491 | int retval = 0; | |
492 | void *addr_buf; | |
493 | struct sockaddr *sa_addr; | |
494 | struct sctp_af *af; | |
495 | ||
bb33381d DB |
496 | pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", __func__, sk, |
497 | addrs, addrcnt); | |
1da177e4 LT |
498 | |
499 | addr_buf = addrs; | |
500 | for (cnt = 0; cnt < addrcnt; cnt++) { | |
501 | /* The list may contain either IPv4 or IPv6 address; | |
502 | * determine the address length for walking thru the list. | |
503 | */ | |
ea110733 | 504 | sa_addr = addr_buf; |
1da177e4 LT |
505 | af = sctp_get_af_specific(sa_addr->sa_family); |
506 | if (!af) { | |
507 | retval = -EINVAL; | |
508 | goto err_bindx_add; | |
509 | } | |
510 | ||
d808ad9a | 511 | retval = sctp_do_bind(sk, (union sctp_addr *)sa_addr, |
1da177e4 LT |
512 | af->sockaddr_len); |
513 | ||
514 | addr_buf += af->sockaddr_len; | |
515 | ||
516 | err_bindx_add: | |
517 | if (retval < 0) { | |
518 | /* Failed. Cleanup the ones that have been added */ | |
519 | if (cnt > 0) | |
520 | sctp_bindx_rem(sk, addrs, cnt); | |
521 | return retval; | |
522 | } | |
523 | } | |
524 | ||
525 | return retval; | |
526 | } | |
527 | ||
528 | /* Send an ASCONF chunk with Add IP address parameters to all the peers of the | |
529 | * associations that are part of the endpoint indicating that a list of local | |
530 | * addresses are added to the endpoint. | |
531 | * | |
d808ad9a | 532 | * If any of the addresses is already in the bind address list of the |
1da177e4 LT |
533 | * association, we do not send the chunk for that association. But it will not |
534 | * affect other associations. | |
535 | * | |
536 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
537 | */ | |
d808ad9a | 538 | static int sctp_send_asconf_add_ip(struct sock *sk, |
1da177e4 LT |
539 | struct sockaddr *addrs, |
540 | int addrcnt) | |
541 | { | |
e1fc3b14 | 542 | struct net *net = sock_net(sk); |
1da177e4 LT |
543 | struct sctp_sock *sp; |
544 | struct sctp_endpoint *ep; | |
545 | struct sctp_association *asoc; | |
546 | struct sctp_bind_addr *bp; | |
547 | struct sctp_chunk *chunk; | |
548 | struct sctp_sockaddr_entry *laddr; | |
549 | union sctp_addr *addr; | |
dc022a98 | 550 | union sctp_addr saveaddr; |
1da177e4 LT |
551 | void *addr_buf; |
552 | struct sctp_af *af; | |
1da177e4 LT |
553 | struct list_head *p; |
554 | int i; | |
555 | int retval = 0; | |
556 | ||
e1fc3b14 | 557 | if (!net->sctp.addip_enable) |
1da177e4 LT |
558 | return retval; |
559 | ||
560 | sp = sctp_sk(sk); | |
561 | ep = sp->ep; | |
562 | ||
bb33381d DB |
563 | pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", |
564 | __func__, sk, addrs, addrcnt); | |
1da177e4 | 565 | |
9dbc15f0 | 566 | list_for_each_entry(asoc, &ep->asocs, asocs) { |
1da177e4 LT |
567 | if (!asoc->peer.asconf_capable) |
568 | continue; | |
569 | ||
570 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_ADD_IP) | |
571 | continue; | |
572 | ||
573 | if (!sctp_state(asoc, ESTABLISHED)) | |
574 | continue; | |
575 | ||
576 | /* Check if any address in the packed array of addresses is | |
d808ad9a YH |
577 | * in the bind address list of the association. If so, |
578 | * do not send the asconf chunk to its peer, but continue with | |
1da177e4 LT |
579 | * other associations. |
580 | */ | |
581 | addr_buf = addrs; | |
582 | for (i = 0; i < addrcnt; i++) { | |
ea110733 | 583 | addr = addr_buf; |
1da177e4 LT |
584 | af = sctp_get_af_specific(addr->v4.sin_family); |
585 | if (!af) { | |
586 | retval = -EINVAL; | |
587 | goto out; | |
588 | } | |
589 | ||
590 | if (sctp_assoc_lookup_laddr(asoc, addr)) | |
591 | break; | |
592 | ||
593 | addr_buf += af->sockaddr_len; | |
594 | } | |
595 | if (i < addrcnt) | |
596 | continue; | |
597 | ||
559cf710 VY |
598 | /* Use the first valid address in bind addr list of |
599 | * association as Address Parameter of ASCONF CHUNK. | |
1da177e4 | 600 | */ |
1da177e4 LT |
601 | bp = &asoc->base.bind_addr; |
602 | p = bp->address_list.next; | |
603 | laddr = list_entry(p, struct sctp_sockaddr_entry, list); | |
5ae955cf | 604 | chunk = sctp_make_asconf_update_ip(asoc, &laddr->a, addrs, |
1da177e4 LT |
605 | addrcnt, SCTP_PARAM_ADD_IP); |
606 | if (!chunk) { | |
607 | retval = -ENOMEM; | |
608 | goto out; | |
609 | } | |
610 | ||
dc022a98 SS |
611 | /* Add the new addresses to the bind address list with |
612 | * use_as_src set to 0. | |
1da177e4 | 613 | */ |
dc022a98 SS |
614 | addr_buf = addrs; |
615 | for (i = 0; i < addrcnt; i++) { | |
ea110733 | 616 | addr = addr_buf; |
dc022a98 SS |
617 | af = sctp_get_af_specific(addr->v4.sin_family); |
618 | memcpy(&saveaddr, addr, af->sockaddr_len); | |
f57d96b2 | 619 | retval = sctp_add_bind_addr(bp, &saveaddr, |
133800d1 | 620 | sizeof(saveaddr), |
f57d96b2 | 621 | SCTP_ADDR_NEW, GFP_ATOMIC); |
dc022a98 SS |
622 | addr_buf += af->sockaddr_len; |
623 | } | |
8a07eb0a MH |
624 | if (asoc->src_out_of_asoc_ok) { |
625 | struct sctp_transport *trans; | |
626 | ||
627 | list_for_each_entry(trans, | |
628 | &asoc->peer.transport_addr_list, transports) { | |
8a07eb0a MH |
629 | trans->cwnd = min(4*asoc->pathmtu, max_t(__u32, |
630 | 2*asoc->pathmtu, 4380)); | |
631 | trans->ssthresh = asoc->peer.i.a_rwnd; | |
632 | trans->rto = asoc->rto_initial; | |
196d6759 | 633 | sctp_max_rto(asoc, trans); |
8a07eb0a | 634 | trans->rtt = trans->srtt = trans->rttvar = 0; |
6e91b578 | 635 | /* Clear the source and route cache */ |
8a07eb0a | 636 | sctp_transport_route(trans, NULL, |
6e91b578 | 637 | sctp_sk(asoc->base.sk)); |
8a07eb0a MH |
638 | } |
639 | } | |
640 | retval = sctp_send_asconf(asoc, chunk); | |
1da177e4 LT |
641 | } |
642 | ||
643 | out: | |
644 | return retval; | |
645 | } | |
646 | ||
647 | /* Remove a list of addresses from bind addresses list. Do not remove the | |
648 | * last address. | |
649 | * | |
650 | * Basically run through each address specified in the addrs/addrcnt | |
651 | * array/length pair, determine if it is IPv6 or IPv4 and call | |
652 | * sctp_del_bind() on it. | |
653 | * | |
654 | * If any of them fails, then the operation will be reversed and the | |
655 | * ones that were removed will be added back. | |
656 | * | |
657 | * At least one address has to be left; if only one address is | |
658 | * available, the operation will return -EBUSY. | |
659 | * | |
660 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
661 | */ | |
04675210 | 662 | static int sctp_bindx_rem(struct sock *sk, struct sockaddr *addrs, int addrcnt) |
1da177e4 LT |
663 | { |
664 | struct sctp_sock *sp = sctp_sk(sk); | |
665 | struct sctp_endpoint *ep = sp->ep; | |
666 | int cnt; | |
667 | struct sctp_bind_addr *bp = &ep->base.bind_addr; | |
668 | int retval = 0; | |
1da177e4 | 669 | void *addr_buf; |
c9a08505 | 670 | union sctp_addr *sa_addr; |
1da177e4 LT |
671 | struct sctp_af *af; |
672 | ||
bb33381d DB |
673 | pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", |
674 | __func__, sk, addrs, addrcnt); | |
1da177e4 LT |
675 | |
676 | addr_buf = addrs; | |
677 | for (cnt = 0; cnt < addrcnt; cnt++) { | |
678 | /* If the bind address list is empty or if there is only one | |
679 | * bind address, there is nothing more to be removed (we need | |
680 | * at least one address here). | |
681 | */ | |
682 | if (list_empty(&bp->address_list) || | |
683 | (sctp_list_single_entry(&bp->address_list))) { | |
684 | retval = -EBUSY; | |
685 | goto err_bindx_rem; | |
686 | } | |
687 | ||
ea110733 | 688 | sa_addr = addr_buf; |
c9a08505 | 689 | af = sctp_get_af_specific(sa_addr->sa.sa_family); |
1da177e4 LT |
690 | if (!af) { |
691 | retval = -EINVAL; | |
692 | goto err_bindx_rem; | |
693 | } | |
0304ff8a PG |
694 | |
695 | if (!af->addr_valid(sa_addr, sp, NULL)) { | |
696 | retval = -EADDRNOTAVAIL; | |
697 | goto err_bindx_rem; | |
698 | } | |
699 | ||
ee9cbaca VY |
700 | if (sa_addr->v4.sin_port && |
701 | sa_addr->v4.sin_port != htons(bp->port)) { | |
1da177e4 LT |
702 | retval = -EINVAL; |
703 | goto err_bindx_rem; | |
704 | } | |
705 | ||
ee9cbaca VY |
706 | if (!sa_addr->v4.sin_port) |
707 | sa_addr->v4.sin_port = htons(bp->port); | |
708 | ||
1da177e4 LT |
709 | /* FIXME - There is probably a need to check if sk->sk_saddr and |
710 | * sk->sk_rcv_addr are currently set to one of the addresses to | |
711 | * be removed. This is something which needs to be looked into | |
712 | * when we are fixing the outstanding issues with multi-homing | |
713 | * socket routing and failover schemes. Refer to comments in | |
714 | * sctp_do_bind(). -daisy | |
715 | */ | |
0ed90fb0 | 716 | retval = sctp_del_bind_addr(bp, sa_addr); |
1da177e4 LT |
717 | |
718 | addr_buf += af->sockaddr_len; | |
719 | err_bindx_rem: | |
720 | if (retval < 0) { | |
721 | /* Failed. Add the ones that has been removed back */ | |
722 | if (cnt > 0) | |
723 | sctp_bindx_add(sk, addrs, cnt); | |
724 | return retval; | |
725 | } | |
726 | } | |
727 | ||
728 | return retval; | |
729 | } | |
730 | ||
731 | /* Send an ASCONF chunk with Delete IP address parameters to all the peers of | |
732 | * the associations that are part of the endpoint indicating that a list of | |
733 | * local addresses are removed from the endpoint. | |
734 | * | |
d808ad9a | 735 | * If any of the addresses is already in the bind address list of the |
1da177e4 LT |
736 | * association, we do not send the chunk for that association. But it will not |
737 | * affect other associations. | |
738 | * | |
739 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
740 | */ | |
741 | static int sctp_send_asconf_del_ip(struct sock *sk, | |
742 | struct sockaddr *addrs, | |
743 | int addrcnt) | |
744 | { | |
e1fc3b14 | 745 | struct net *net = sock_net(sk); |
1da177e4 LT |
746 | struct sctp_sock *sp; |
747 | struct sctp_endpoint *ep; | |
748 | struct sctp_association *asoc; | |
dc022a98 | 749 | struct sctp_transport *transport; |
1da177e4 LT |
750 | struct sctp_bind_addr *bp; |
751 | struct sctp_chunk *chunk; | |
752 | union sctp_addr *laddr; | |
753 | void *addr_buf; | |
754 | struct sctp_af *af; | |
dc022a98 | 755 | struct sctp_sockaddr_entry *saddr; |
1da177e4 LT |
756 | int i; |
757 | int retval = 0; | |
8a07eb0a | 758 | int stored = 0; |
1da177e4 | 759 | |
8a07eb0a | 760 | chunk = NULL; |
e1fc3b14 | 761 | if (!net->sctp.addip_enable) |
1da177e4 LT |
762 | return retval; |
763 | ||
764 | sp = sctp_sk(sk); | |
765 | ep = sp->ep; | |
766 | ||
bb33381d DB |
767 | pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", |
768 | __func__, sk, addrs, addrcnt); | |
1da177e4 | 769 | |
9dbc15f0 | 770 | list_for_each_entry(asoc, &ep->asocs, asocs) { |
1da177e4 LT |
771 | |
772 | if (!asoc->peer.asconf_capable) | |
773 | continue; | |
774 | ||
775 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_DEL_IP) | |
776 | continue; | |
777 | ||
778 | if (!sctp_state(asoc, ESTABLISHED)) | |
779 | continue; | |
780 | ||
781 | /* Check if any address in the packed array of addresses is | |
d808ad9a | 782 | * not present in the bind address list of the association. |
1da177e4 LT |
783 | * If so, do not send the asconf chunk to its peer, but |
784 | * continue with other associations. | |
785 | */ | |
786 | addr_buf = addrs; | |
787 | for (i = 0; i < addrcnt; i++) { | |
ea110733 | 788 | laddr = addr_buf; |
1da177e4 LT |
789 | af = sctp_get_af_specific(laddr->v4.sin_family); |
790 | if (!af) { | |
791 | retval = -EINVAL; | |
792 | goto out; | |
793 | } | |
794 | ||
795 | if (!sctp_assoc_lookup_laddr(asoc, laddr)) | |
796 | break; | |
797 | ||
798 | addr_buf += af->sockaddr_len; | |
799 | } | |
800 | if (i < addrcnt) | |
801 | continue; | |
802 | ||
803 | /* Find one address in the association's bind address list | |
804 | * that is not in the packed array of addresses. This is to | |
805 | * make sure that we do not delete all the addresses in the | |
806 | * association. | |
807 | */ | |
1da177e4 LT |
808 | bp = &asoc->base.bind_addr; |
809 | laddr = sctp_find_unmatch_addr(bp, (union sctp_addr *)addrs, | |
810 | addrcnt, sp); | |
8a07eb0a MH |
811 | if ((laddr == NULL) && (addrcnt == 1)) { |
812 | if (asoc->asconf_addr_del_pending) | |
813 | continue; | |
814 | asoc->asconf_addr_del_pending = | |
815 | kzalloc(sizeof(union sctp_addr), GFP_ATOMIC); | |
6d65e5ee MH |
816 | if (asoc->asconf_addr_del_pending == NULL) { |
817 | retval = -ENOMEM; | |
818 | goto out; | |
819 | } | |
8a07eb0a MH |
820 | asoc->asconf_addr_del_pending->sa.sa_family = |
821 | addrs->sa_family; | |
822 | asoc->asconf_addr_del_pending->v4.sin_port = | |
823 | htons(bp->port); | |
824 | if (addrs->sa_family == AF_INET) { | |
825 | struct sockaddr_in *sin; | |
826 | ||
827 | sin = (struct sockaddr_in *)addrs; | |
828 | asoc->asconf_addr_del_pending->v4.sin_addr.s_addr = sin->sin_addr.s_addr; | |
829 | } else if (addrs->sa_family == AF_INET6) { | |
830 | struct sockaddr_in6 *sin6; | |
831 | ||
832 | sin6 = (struct sockaddr_in6 *)addrs; | |
4e3fd7a0 | 833 | asoc->asconf_addr_del_pending->v6.sin6_addr = sin6->sin6_addr; |
8a07eb0a | 834 | } |
bb33381d DB |
835 | |
836 | pr_debug("%s: keep the last address asoc:%p %pISc at %p\n", | |
837 | __func__, asoc, &asoc->asconf_addr_del_pending->sa, | |
838 | asoc->asconf_addr_del_pending); | |
839 | ||
8a07eb0a MH |
840 | asoc->src_out_of_asoc_ok = 1; |
841 | stored = 1; | |
842 | goto skip_mkasconf; | |
843 | } | |
1da177e4 | 844 | |
88362ad8 DB |
845 | if (laddr == NULL) |
846 | return -EINVAL; | |
847 | ||
559cf710 VY |
848 | /* We do not need RCU protection throughout this loop |
849 | * because this is done under a socket lock from the | |
850 | * setsockopt call. | |
851 | */ | |
1da177e4 LT |
852 | chunk = sctp_make_asconf_update_ip(asoc, laddr, addrs, addrcnt, |
853 | SCTP_PARAM_DEL_IP); | |
854 | if (!chunk) { | |
855 | retval = -ENOMEM; | |
856 | goto out; | |
857 | } | |
858 | ||
8a07eb0a | 859 | skip_mkasconf: |
dc022a98 SS |
860 | /* Reset use_as_src flag for the addresses in the bind address |
861 | * list that are to be deleted. | |
862 | */ | |
dc022a98 SS |
863 | addr_buf = addrs; |
864 | for (i = 0; i < addrcnt; i++) { | |
ea110733 | 865 | laddr = addr_buf; |
dc022a98 | 866 | af = sctp_get_af_specific(laddr->v4.sin_family); |
559cf710 | 867 | list_for_each_entry(saddr, &bp->address_list, list) { |
5f242a13 | 868 | if (sctp_cmp_addr_exact(&saddr->a, laddr)) |
f57d96b2 | 869 | saddr->state = SCTP_ADDR_DEL; |
dc022a98 SS |
870 | } |
871 | addr_buf += af->sockaddr_len; | |
872 | } | |
1da177e4 | 873 | |
dc022a98 SS |
874 | /* Update the route and saddr entries for all the transports |
875 | * as some of the addresses in the bind address list are | |
876 | * about to be deleted and cannot be used as source addresses. | |
1da177e4 | 877 | */ |
9dbc15f0 RD |
878 | list_for_each_entry(transport, &asoc->peer.transport_addr_list, |
879 | transports) { | |
dc022a98 SS |
880 | sctp_transport_route(transport, NULL, |
881 | sctp_sk(asoc->base.sk)); | |
882 | } | |
883 | ||
8a07eb0a MH |
884 | if (stored) |
885 | /* We don't need to transmit ASCONF */ | |
886 | continue; | |
dc022a98 | 887 | retval = sctp_send_asconf(asoc, chunk); |
1da177e4 LT |
888 | } |
889 | out: | |
890 | return retval; | |
891 | } | |
892 | ||
9f7d653b MH |
893 | /* set addr events to assocs in the endpoint. ep and addr_wq must be locked */ |
894 | int sctp_asconf_mgmt(struct sctp_sock *sp, struct sctp_sockaddr_entry *addrw) | |
895 | { | |
896 | struct sock *sk = sctp_opt2sk(sp); | |
897 | union sctp_addr *addr; | |
898 | struct sctp_af *af; | |
899 | ||
900 | /* It is safe to write port space in caller. */ | |
901 | addr = &addrw->a; | |
902 | addr->v4.sin_port = htons(sp->ep->base.bind_addr.port); | |
903 | af = sctp_get_af_specific(addr->sa.sa_family); | |
904 | if (!af) | |
905 | return -EINVAL; | |
906 | if (sctp_verify_addr(sk, addr, af->sockaddr_len)) | |
907 | return -EINVAL; | |
908 | ||
909 | if (addrw->state == SCTP_ADDR_NEW) | |
910 | return sctp_send_asconf_add_ip(sk, (struct sockaddr *)addr, 1); | |
911 | else | |
912 | return sctp_send_asconf_del_ip(sk, (struct sockaddr *)addr, 1); | |
913 | } | |
914 | ||
1da177e4 LT |
915 | /* Helper for tunneling sctp_bindx() requests through sctp_setsockopt() |
916 | * | |
917 | * API 8.1 | |
918 | * int sctp_bindx(int sd, struct sockaddr *addrs, int addrcnt, | |
919 | * int flags); | |
920 | * | |
921 | * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses. | |
922 | * If the sd is an IPv6 socket, the addresses passed can either be IPv4 | |
923 | * or IPv6 addresses. | |
924 | * | |
925 | * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see | |
926 | * Section 3.1.2 for this usage. | |
927 | * | |
928 | * addrs is a pointer to an array of one or more socket addresses. Each | |
929 | * address is contained in its appropriate structure (i.e. struct | |
930 | * sockaddr_in or struct sockaddr_in6) the family of the address type | |
23c435f7 | 931 | * must be used to distinguish the address length (note that this |
1da177e4 LT |
932 | * representation is termed a "packed array" of addresses). The caller |
933 | * specifies the number of addresses in the array with addrcnt. | |
934 | * | |
935 | * On success, sctp_bindx() returns 0. On failure, sctp_bindx() returns | |
936 | * -1, and sets errno to the appropriate error code. | |
937 | * | |
938 | * For SCTP, the port given in each socket address must be the same, or | |
939 | * sctp_bindx() will fail, setting errno to EINVAL. | |
940 | * | |
941 | * The flags parameter is formed from the bitwise OR of zero or more of | |
942 | * the following currently defined flags: | |
943 | * | |
944 | * SCTP_BINDX_ADD_ADDR | |
945 | * | |
946 | * SCTP_BINDX_REM_ADDR | |
947 | * | |
948 | * SCTP_BINDX_ADD_ADDR directs SCTP to add the given addresses to the | |
949 | * association, and SCTP_BINDX_REM_ADDR directs SCTP to remove the given | |
950 | * addresses from the association. The two flags are mutually exclusive; | |
951 | * if both are given, sctp_bindx() will fail with EINVAL. A caller may | |
952 | * not remove all addresses from an association; sctp_bindx() will | |
953 | * reject such an attempt with EINVAL. | |
954 | * | |
955 | * An application can use sctp_bindx(SCTP_BINDX_ADD_ADDR) to associate | |
956 | * additional addresses with an endpoint after calling bind(). Or use | |
957 | * sctp_bindx(SCTP_BINDX_REM_ADDR) to remove some addresses a listening | |
958 | * socket is associated with so that no new association accepted will be | |
959 | * associated with those addresses. If the endpoint supports dynamic | |
960 | * address a SCTP_BINDX_REM_ADDR or SCTP_BINDX_ADD_ADDR may cause a | |
961 | * endpoint to send the appropriate message to the peer to change the | |
962 | * peers address lists. | |
963 | * | |
964 | * Adding and removing addresses from a connected association is | |
965 | * optional functionality. Implementations that do not support this | |
966 | * functionality should return EOPNOTSUPP. | |
967 | * | |
968 | * Basically do nothing but copying the addresses from user to kernel | |
969 | * land and invoking either sctp_bindx_add() or sctp_bindx_rem() on the sk. | |
3f7a87d2 FF |
970 | * This is used for tunneling the sctp_bindx() request through sctp_setsockopt() |
971 | * from userspace. | |
1da177e4 | 972 | * |
1da177e4 LT |
973 | * On exit there is no need to do sockfd_put(), sys_setsockopt() does |
974 | * it. | |
975 | * | |
976 | * sk The sk of the socket | |
977 | * addrs The pointer to the addresses in user land | |
978 | * addrssize Size of the addrs buffer | |
979 | * op Operation to perform (add or remove, see the flags of | |
980 | * sctp_bindx) | |
981 | * | |
982 | * Returns 0 if ok, <0 errno code on error. | |
983 | */ | |
26ac8e5f | 984 | static int sctp_setsockopt_bindx(struct sock *sk, |
dda91928 DB |
985 | struct sockaddr __user *addrs, |
986 | int addrs_size, int op) | |
1da177e4 LT |
987 | { |
988 | struct sockaddr *kaddrs; | |
989 | int err; | |
990 | int addrcnt = 0; | |
991 | int walk_size = 0; | |
992 | struct sockaddr *sa_addr; | |
993 | void *addr_buf; | |
994 | struct sctp_af *af; | |
995 | ||
bb33381d DB |
996 | pr_debug("%s: sk:%p addrs:%p addrs_size:%d opt:%d\n", |
997 | __func__, sk, addrs, addrs_size, op); | |
1da177e4 LT |
998 | |
999 | if (unlikely(addrs_size <= 0)) | |
1000 | return -EINVAL; | |
1001 | ||
c981f254 AV |
1002 | kaddrs = vmemdup_user(addrs, addrs_size); |
1003 | if (unlikely(IS_ERR(kaddrs))) | |
1004 | return PTR_ERR(kaddrs); | |
1da177e4 | 1005 | |
d808ad9a | 1006 | /* Walk through the addrs buffer and count the number of addresses. */ |
1da177e4 LT |
1007 | addr_buf = kaddrs; |
1008 | while (walk_size < addrs_size) { | |
d7e0d19a | 1009 | if (walk_size + sizeof(sa_family_t) > addrs_size) { |
c981f254 | 1010 | kvfree(kaddrs); |
d7e0d19a DR |
1011 | return -EINVAL; |
1012 | } | |
1013 | ||
ea110733 | 1014 | sa_addr = addr_buf; |
1da177e4 LT |
1015 | af = sctp_get_af_specific(sa_addr->sa_family); |
1016 | ||
1017 | /* If the address family is not supported or if this address | |
1018 | * causes the address buffer to overflow return EINVAL. | |
d808ad9a | 1019 | */ |
1da177e4 | 1020 | if (!af || (walk_size + af->sockaddr_len) > addrs_size) { |
c981f254 | 1021 | kvfree(kaddrs); |
1da177e4 LT |
1022 | return -EINVAL; |
1023 | } | |
1024 | addrcnt++; | |
1025 | addr_buf += af->sockaddr_len; | |
1026 | walk_size += af->sockaddr_len; | |
1027 | } | |
1028 | ||
1029 | /* Do the work. */ | |
1030 | switch (op) { | |
1031 | case SCTP_BINDX_ADD_ADDR: | |
2277c7cd RH |
1032 | /* Allow security module to validate bindx addresses. */ |
1033 | err = security_sctp_bind_connect(sk, SCTP_SOCKOPT_BINDX_ADD, | |
1034 | (struct sockaddr *)kaddrs, | |
1035 | addrs_size); | |
1036 | if (err) | |
1037 | goto out; | |
1da177e4 LT |
1038 | err = sctp_bindx_add(sk, kaddrs, addrcnt); |
1039 | if (err) | |
1040 | goto out; | |
1041 | err = sctp_send_asconf_add_ip(sk, kaddrs, addrcnt); | |
1042 | break; | |
1043 | ||
1044 | case SCTP_BINDX_REM_ADDR: | |
1045 | err = sctp_bindx_rem(sk, kaddrs, addrcnt); | |
1046 | if (err) | |
1047 | goto out; | |
1048 | err = sctp_send_asconf_del_ip(sk, kaddrs, addrcnt); | |
1049 | break; | |
1050 | ||
1051 | default: | |
1052 | err = -EINVAL; | |
1053 | break; | |
3ff50b79 | 1054 | } |
1da177e4 LT |
1055 | |
1056 | out: | |
c981f254 | 1057 | kvfree(kaddrs); |
1da177e4 LT |
1058 | |
1059 | return err; | |
1060 | } | |
1061 | ||
3f7a87d2 FF |
1062 | /* __sctp_connect(struct sock* sk, struct sockaddr *kaddrs, int addrs_size) |
1063 | * | |
1064 | * Common routine for handling connect() and sctp_connectx(). | |
1065 | * Connect will come in with just a single address. | |
1066 | */ | |
26ac8e5f | 1067 | static int __sctp_connect(struct sock *sk, |
3f7a87d2 | 1068 | struct sockaddr *kaddrs, |
644fbdea | 1069 | int addrs_size, int flags, |
88a0a948 | 1070 | sctp_assoc_t *assoc_id) |
3f7a87d2 | 1071 | { |
55e26eb9 | 1072 | struct net *net = sock_net(sk); |
3f7a87d2 FF |
1073 | struct sctp_sock *sp; |
1074 | struct sctp_endpoint *ep; | |
1075 | struct sctp_association *asoc = NULL; | |
1076 | struct sctp_association *asoc2; | |
1077 | struct sctp_transport *transport; | |
1078 | union sctp_addr to; | |
1c662018 | 1079 | enum sctp_scope scope; |
3f7a87d2 FF |
1080 | long timeo; |
1081 | int err = 0; | |
1082 | int addrcnt = 0; | |
1083 | int walk_size = 0; | |
e4d1feab | 1084 | union sctp_addr *sa_addr = NULL; |
3f7a87d2 | 1085 | void *addr_buf; |
16d00fb7 | 1086 | unsigned short port; |
3f7a87d2 FF |
1087 | |
1088 | sp = sctp_sk(sk); | |
1089 | ep = sp->ep; | |
1090 | ||
1091 | /* connect() cannot be done on a socket that is already in ESTABLISHED | |
1092 | * state - UDP-style peeled off socket or a TCP-style socket that | |
1093 | * is already connected. | |
1094 | * It cannot be done even on a TCP-style listening socket. | |
1095 | */ | |
e5b13f34 | 1096 | if (sctp_sstate(sk, ESTABLISHED) || sctp_sstate(sk, CLOSING) || |
3f7a87d2 FF |
1097 | (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))) { |
1098 | err = -EISCONN; | |
1099 | goto out_free; | |
1100 | } | |
1101 | ||
1102 | /* Walk through the addrs buffer and count the number of addresses. */ | |
1103 | addr_buf = kaddrs; | |
1104 | while (walk_size < addrs_size) { | |
299ee123 JG |
1105 | struct sctp_af *af; |
1106 | ||
d7e0d19a DR |
1107 | if (walk_size + sizeof(sa_family_t) > addrs_size) { |
1108 | err = -EINVAL; | |
1109 | goto out_free; | |
1110 | } | |
1111 | ||
ea110733 | 1112 | sa_addr = addr_buf; |
4bdf4b5f | 1113 | af = sctp_get_af_specific(sa_addr->sa.sa_family); |
3f7a87d2 FF |
1114 | |
1115 | /* If the address family is not supported or if this address | |
1116 | * causes the address buffer to overflow return EINVAL. | |
1117 | */ | |
1118 | if (!af || (walk_size + af->sockaddr_len) > addrs_size) { | |
1119 | err = -EINVAL; | |
1120 | goto out_free; | |
1121 | } | |
1122 | ||
d7e0d19a DR |
1123 | port = ntohs(sa_addr->v4.sin_port); |
1124 | ||
e4d1feab VY |
1125 | /* Save current address so we can work with it */ |
1126 | memcpy(&to, sa_addr, af->sockaddr_len); | |
1127 | ||
1128 | err = sctp_verify_addr(sk, &to, af->sockaddr_len); | |
3f7a87d2 FF |
1129 | if (err) |
1130 | goto out_free; | |
1131 | ||
16d00fb7 VY |
1132 | /* Make sure the destination port is correctly set |
1133 | * in all addresses. | |
1134 | */ | |
524fba6c WY |
1135 | if (asoc && asoc->peer.port && asoc->peer.port != port) { |
1136 | err = -EINVAL; | |
16d00fb7 | 1137 | goto out_free; |
524fba6c | 1138 | } |
3f7a87d2 FF |
1139 | |
1140 | /* Check if there already is a matching association on the | |
1141 | * endpoint (other than the one created here). | |
1142 | */ | |
e4d1feab | 1143 | asoc2 = sctp_endpoint_lookup_assoc(ep, &to, &transport); |
3f7a87d2 FF |
1144 | if (asoc2 && asoc2 != asoc) { |
1145 | if (asoc2->state >= SCTP_STATE_ESTABLISHED) | |
1146 | err = -EISCONN; | |
1147 | else | |
1148 | err = -EALREADY; | |
1149 | goto out_free; | |
1150 | } | |
1151 | ||
1152 | /* If we could not find a matching association on the endpoint, | |
1153 | * make sure that there is no peeled-off association matching | |
1154 | * the peer address even on another socket. | |
1155 | */ | |
e4d1feab | 1156 | if (sctp_endpoint_is_peeled_off(ep, &to)) { |
3f7a87d2 FF |
1157 | err = -EADDRNOTAVAIL; |
1158 | goto out_free; | |
1159 | } | |
1160 | ||
1161 | if (!asoc) { | |
1162 | /* If a bind() or sctp_bindx() is not called prior to | |
1163 | * an sctp_connectx() call, the system picks an | |
1164 | * ephemeral port and will choose an address set | |
1165 | * equivalent to binding with a wildcard address. | |
1166 | */ | |
1167 | if (!ep->base.bind_addr.port) { | |
1168 | if (sctp_autobind(sk)) { | |
1169 | err = -EAGAIN; | |
1170 | goto out_free; | |
1171 | } | |
64a0c1c8 ISJ |
1172 | } else { |
1173 | /* | |
d808ad9a YH |
1174 | * If an unprivileged user inherits a 1-many |
1175 | * style socket with open associations on a | |
1176 | * privileged port, it MAY be permitted to | |
1177 | * accept new associations, but it SHOULD NOT | |
64a0c1c8 ISJ |
1178 | * be permitted to open new associations. |
1179 | */ | |
4548b683 KJ |
1180 | if (ep->base.bind_addr.port < |
1181 | inet_prot_sock(net) && | |
1182 | !ns_capable(net->user_ns, | |
1183 | CAP_NET_BIND_SERVICE)) { | |
64a0c1c8 ISJ |
1184 | err = -EACCES; |
1185 | goto out_free; | |
1186 | } | |
3f7a87d2 FF |
1187 | } |
1188 | ||
e4d1feab | 1189 | scope = sctp_scope(&to); |
3f7a87d2 FF |
1190 | asoc = sctp_association_new(ep, sk, scope, GFP_KERNEL); |
1191 | if (!asoc) { | |
1192 | err = -ENOMEM; | |
1193 | goto out_free; | |
1194 | } | |
409b95af VY |
1195 | |
1196 | err = sctp_assoc_set_bind_addr_from_ep(asoc, scope, | |
1197 | GFP_KERNEL); | |
1198 | if (err < 0) { | |
1199 | goto out_free; | |
1200 | } | |
1201 | ||
3f7a87d2 FF |
1202 | } |
1203 | ||
1204 | /* Prime the peer's transport structures. */ | |
e4d1feab | 1205 | transport = sctp_assoc_add_peer(asoc, &to, GFP_KERNEL, |
3f7a87d2 FF |
1206 | SCTP_UNKNOWN); |
1207 | if (!transport) { | |
1208 | err = -ENOMEM; | |
1209 | goto out_free; | |
1210 | } | |
1211 | ||
1212 | addrcnt++; | |
1213 | addr_buf += af->sockaddr_len; | |
1214 | walk_size += af->sockaddr_len; | |
1215 | } | |
1216 | ||
c6ba68a2 VY |
1217 | /* In case the user of sctp_connectx() wants an association |
1218 | * id back, assign one now. | |
1219 | */ | |
1220 | if (assoc_id) { | |
1221 | err = sctp_assoc_set_id(asoc, GFP_KERNEL); | |
1222 | if (err < 0) | |
1223 | goto out_free; | |
1224 | } | |
1225 | ||
55e26eb9 | 1226 | err = sctp_primitive_ASSOCIATE(net, asoc, NULL); |
3f7a87d2 FF |
1227 | if (err < 0) { |
1228 | goto out_free; | |
1229 | } | |
1230 | ||
1231 | /* Initialize sk's dport and daddr for getpeername() */ | |
c720c7e8 | 1232 | inet_sk(sk)->inet_dport = htons(asoc->peer.port); |
299ee123 | 1233 | sp->pf->to_sk_daddr(sa_addr, sk); |
8de8c873 | 1234 | sk->sk_err = 0; |
3f7a87d2 | 1235 | |
644fbdea | 1236 | timeo = sock_sndtimeo(sk, flags & O_NONBLOCK); |
f50f95ca | 1237 | |
7233bc84 | 1238 | if (assoc_id) |
88a0a948 | 1239 | *assoc_id = asoc->assoc_id; |
2277c7cd | 1240 | |
7233bc84 MRL |
1241 | err = sctp_wait_for_connect(asoc, &timeo); |
1242 | /* Note: the asoc may be freed after the return of | |
1243 | * sctp_wait_for_connect. | |
1244 | */ | |
3f7a87d2 FF |
1245 | |
1246 | /* Don't free association on exit. */ | |
1247 | asoc = NULL; | |
1248 | ||
1249 | out_free: | |
bb33381d DB |
1250 | pr_debug("%s: took out_free path with asoc:%p kaddrs:%p err:%d\n", |
1251 | __func__, asoc, kaddrs, err); | |
3f7a87d2 | 1252 | |
2eebc1e1 NH |
1253 | if (asoc) { |
1254 | /* sctp_primitive_ASSOCIATE may have added this association | |
1255 | * To the hash table, try to unhash it, just in case, its a noop | |
1256 | * if it wasn't hashed so we're safe | |
1257 | */ | |
3f7a87d2 | 1258 | sctp_association_free(asoc); |
2eebc1e1 | 1259 | } |
3f7a87d2 FF |
1260 | return err; |
1261 | } | |
1262 | ||
1263 | /* Helper for tunneling sctp_connectx() requests through sctp_setsockopt() | |
1264 | * | |
1265 | * API 8.9 | |
88a0a948 VY |
1266 | * int sctp_connectx(int sd, struct sockaddr *addrs, int addrcnt, |
1267 | * sctp_assoc_t *asoc); | |
3f7a87d2 FF |
1268 | * |
1269 | * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses. | |
1270 | * If the sd is an IPv6 socket, the addresses passed can either be IPv4 | |
1271 | * or IPv6 addresses. | |
1272 | * | |
1273 | * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see | |
1274 | * Section 3.1.2 for this usage. | |
1275 | * | |
1276 | * addrs is a pointer to an array of one or more socket addresses. Each | |
1277 | * address is contained in its appropriate structure (i.e. struct | |
1278 | * sockaddr_in or struct sockaddr_in6) the family of the address type | |
1279 | * must be used to distengish the address length (note that this | |
1280 | * representation is termed a "packed array" of addresses). The caller | |
1281 | * specifies the number of addresses in the array with addrcnt. | |
1282 | * | |
88a0a948 VY |
1283 | * On success, sctp_connectx() returns 0. It also sets the assoc_id to |
1284 | * the association id of the new association. On failure, sctp_connectx() | |
1285 | * returns -1, and sets errno to the appropriate error code. The assoc_id | |
1286 | * is not touched by the kernel. | |
3f7a87d2 FF |
1287 | * |
1288 | * For SCTP, the port given in each socket address must be the same, or | |
1289 | * sctp_connectx() will fail, setting errno to EINVAL. | |
1290 | * | |
1291 | * An application can use sctp_connectx to initiate an association with | |
1292 | * an endpoint that is multi-homed. Much like sctp_bindx() this call | |
1293 | * allows a caller to specify multiple addresses at which a peer can be | |
1294 | * reached. The way the SCTP stack uses the list of addresses to set up | |
25985edc | 1295 | * the association is implementation dependent. This function only |
3f7a87d2 FF |
1296 | * specifies that the stack will try to make use of all the addresses in |
1297 | * the list when needed. | |
1298 | * | |
1299 | * Note that the list of addresses passed in is only used for setting up | |
1300 | * the association. It does not necessarily equal the set of addresses | |
1301 | * the peer uses for the resulting association. If the caller wants to | |
1302 | * find out the set of peer addresses, it must use sctp_getpaddrs() to | |
1303 | * retrieve them after the association has been set up. | |
1304 | * | |
1305 | * Basically do nothing but copying the addresses from user to kernel | |
1306 | * land and invoking either sctp_connectx(). This is used for tunneling | |
1307 | * the sctp_connectx() request through sctp_setsockopt() from userspace. | |
1308 | * | |
3f7a87d2 FF |
1309 | * On exit there is no need to do sockfd_put(), sys_setsockopt() does |
1310 | * it. | |
1311 | * | |
1312 | * sk The sk of the socket | |
1313 | * addrs The pointer to the addresses in user land | |
1314 | * addrssize Size of the addrs buffer | |
1315 | * | |
88a0a948 | 1316 | * Returns >=0 if ok, <0 errno code on error. |
3f7a87d2 | 1317 | */ |
26ac8e5f | 1318 | static int __sctp_setsockopt_connectx(struct sock *sk, |
3f7a87d2 | 1319 | struct sockaddr __user *addrs, |
88a0a948 VY |
1320 | int addrs_size, |
1321 | sctp_assoc_t *assoc_id) | |
3f7a87d2 | 1322 | { |
3f7a87d2 | 1323 | struct sockaddr *kaddrs; |
644fbdea | 1324 | int err = 0, flags = 0; |
3f7a87d2 | 1325 | |
bb33381d DB |
1326 | pr_debug("%s: sk:%p addrs:%p addrs_size:%d\n", |
1327 | __func__, sk, addrs, addrs_size); | |
3f7a87d2 FF |
1328 | |
1329 | if (unlikely(addrs_size <= 0)) | |
1330 | return -EINVAL; | |
1331 | ||
c981f254 AV |
1332 | kaddrs = vmemdup_user(addrs, addrs_size); |
1333 | if (unlikely(IS_ERR(kaddrs))) | |
1334 | return PTR_ERR(kaddrs); | |
3f7a87d2 | 1335 | |
2277c7cd RH |
1336 | /* Allow security module to validate connectx addresses. */ |
1337 | err = security_sctp_bind_connect(sk, SCTP_SOCKOPT_CONNECTX, | |
1338 | (struct sockaddr *)kaddrs, | |
1339 | addrs_size); | |
1340 | if (err) | |
1341 | goto out_free; | |
1342 | ||
644fbdea XL |
1343 | /* in-kernel sockets don't generally have a file allocated to them |
1344 | * if all they do is call sock_create_kern(). | |
1345 | */ | |
1346 | if (sk->sk_socket->file) | |
1347 | flags = sk->sk_socket->file->f_flags; | |
1348 | ||
1349 | err = __sctp_connect(sk, kaddrs, addrs_size, flags, assoc_id); | |
2277c7cd RH |
1350 | |
1351 | out_free: | |
c981f254 | 1352 | kvfree(kaddrs); |
88a0a948 | 1353 | |
3f7a87d2 FF |
1354 | return err; |
1355 | } | |
1356 | ||
88a0a948 VY |
1357 | /* |
1358 | * This is an older interface. It's kept for backward compatibility | |
1359 | * to the option that doesn't provide association id. | |
1360 | */ | |
26ac8e5f | 1361 | static int sctp_setsockopt_connectx_old(struct sock *sk, |
dda91928 DB |
1362 | struct sockaddr __user *addrs, |
1363 | int addrs_size) | |
88a0a948 VY |
1364 | { |
1365 | return __sctp_setsockopt_connectx(sk, addrs, addrs_size, NULL); | |
1366 | } | |
1367 | ||
1368 | /* | |
1369 | * New interface for the API. The since the API is done with a socket | |
1370 | * option, to make it simple we feed back the association id is as a return | |
1371 | * indication to the call. Error is always negative and association id is | |
1372 | * always positive. | |
1373 | */ | |
26ac8e5f | 1374 | static int sctp_setsockopt_connectx(struct sock *sk, |
dda91928 DB |
1375 | struct sockaddr __user *addrs, |
1376 | int addrs_size) | |
88a0a948 VY |
1377 | { |
1378 | sctp_assoc_t assoc_id = 0; | |
1379 | int err = 0; | |
1380 | ||
1381 | err = __sctp_setsockopt_connectx(sk, addrs, addrs_size, &assoc_id); | |
1382 | ||
1383 | if (err) | |
1384 | return err; | |
1385 | else | |
1386 | return assoc_id; | |
1387 | } | |
1388 | ||
c6ba68a2 | 1389 | /* |
f9c67811 VY |
1390 | * New (hopefully final) interface for the API. |
1391 | * We use the sctp_getaddrs_old structure so that use-space library | |
ffd59393 | 1392 | * can avoid any unnecessary allocations. The only different part |
f9c67811 | 1393 | * is that we store the actual length of the address buffer into the |
ffd59393 | 1394 | * addrs_num structure member. That way we can re-use the existing |
f9c67811 | 1395 | * code. |
c6ba68a2 | 1396 | */ |
ffd59393 DB |
1397 | #ifdef CONFIG_COMPAT |
1398 | struct compat_sctp_getaddrs_old { | |
1399 | sctp_assoc_t assoc_id; | |
1400 | s32 addr_num; | |
1401 | compat_uptr_t addrs; /* struct sockaddr * */ | |
1402 | }; | |
1403 | #endif | |
1404 | ||
26ac8e5f | 1405 | static int sctp_getsockopt_connectx3(struct sock *sk, int len, |
dda91928 DB |
1406 | char __user *optval, |
1407 | int __user *optlen) | |
c6ba68a2 | 1408 | { |
f9c67811 | 1409 | struct sctp_getaddrs_old param; |
c6ba68a2 VY |
1410 | sctp_assoc_t assoc_id = 0; |
1411 | int err = 0; | |
1412 | ||
ffd59393 | 1413 | #ifdef CONFIG_COMPAT |
96c0e0a9 | 1414 | if (in_compat_syscall()) { |
ffd59393 | 1415 | struct compat_sctp_getaddrs_old param32; |
c6ba68a2 | 1416 | |
ffd59393 DB |
1417 | if (len < sizeof(param32)) |
1418 | return -EINVAL; | |
1419 | if (copy_from_user(¶m32, optval, sizeof(param32))) | |
1420 | return -EFAULT; | |
f9c67811 | 1421 | |
ffd59393 DB |
1422 | param.assoc_id = param32.assoc_id; |
1423 | param.addr_num = param32.addr_num; | |
1424 | param.addrs = compat_ptr(param32.addrs); | |
1425 | } else | |
1426 | #endif | |
1427 | { | |
1428 | if (len < sizeof(param)) | |
1429 | return -EINVAL; | |
1430 | if (copy_from_user(¶m, optval, sizeof(param))) | |
1431 | return -EFAULT; | |
1432 | } | |
c6ba68a2 | 1433 | |
ffd59393 DB |
1434 | err = __sctp_setsockopt_connectx(sk, (struct sockaddr __user *) |
1435 | param.addrs, param.addr_num, | |
1436 | &assoc_id); | |
c6ba68a2 VY |
1437 | if (err == 0 || err == -EINPROGRESS) { |
1438 | if (copy_to_user(optval, &assoc_id, sizeof(assoc_id))) | |
1439 | return -EFAULT; | |
1440 | if (put_user(sizeof(assoc_id), optlen)) | |
1441 | return -EFAULT; | |
1442 | } | |
1443 | ||
1444 | return err; | |
1445 | } | |
1446 | ||
1da177e4 LT |
1447 | /* API 3.1.4 close() - UDP Style Syntax |
1448 | * Applications use close() to perform graceful shutdown (as described in | |
1449 | * Section 10.1 of [SCTP]) on ALL the associations currently represented | |
1450 | * by a UDP-style socket. | |
1451 | * | |
1452 | * The syntax is | |
1453 | * | |
1454 | * ret = close(int sd); | |
1455 | * | |
1456 | * sd - the socket descriptor of the associations to be closed. | |
1457 | * | |
1458 | * To gracefully shutdown a specific association represented by the | |
1459 | * UDP-style socket, an application should use the sendmsg() call, | |
1460 | * passing no user data, but including the appropriate flag in the | |
1461 | * ancillary data (see Section xxxx). | |
1462 | * | |
1463 | * If sd in the close() call is a branched-off socket representing only | |
1464 | * one association, the shutdown is performed on that association only. | |
1465 | * | |
1466 | * 4.1.6 close() - TCP Style Syntax | |
1467 | * | |
1468 | * Applications use close() to gracefully close down an association. | |
1469 | * | |
1470 | * The syntax is: | |
1471 | * | |
1472 | * int close(int sd); | |
1473 | * | |
1474 | * sd - the socket descriptor of the association to be closed. | |
1475 | * | |
1476 | * After an application calls close() on a socket descriptor, no further | |
1477 | * socket operations will succeed on that descriptor. | |
1478 | * | |
1479 | * API 7.1.4 SO_LINGER | |
1480 | * | |
1481 | * An application using the TCP-style socket can use this option to | |
1482 | * perform the SCTP ABORT primitive. The linger option structure is: | |
1483 | * | |
1484 | * struct linger { | |
1485 | * int l_onoff; // option on/off | |
1486 | * int l_linger; // linger time | |
1487 | * }; | |
1488 | * | |
1489 | * To enable the option, set l_onoff to 1. If the l_linger value is set | |
1490 | * to 0, calling close() is the same as the ABORT primitive. If the | |
1491 | * value is set to a negative value, the setsockopt() call will return | |
1492 | * an error. If the value is set to a positive value linger_time, the | |
1493 | * close() can be blocked for at most linger_time ms. If the graceful | |
1494 | * shutdown phase does not finish during this period, close() will | |
1495 | * return but the graceful shutdown phase continues in the system. | |
1496 | */ | |
dda91928 | 1497 | static void sctp_close(struct sock *sk, long timeout) |
1da177e4 | 1498 | { |
55e26eb9 | 1499 | struct net *net = sock_net(sk); |
1da177e4 LT |
1500 | struct sctp_endpoint *ep; |
1501 | struct sctp_association *asoc; | |
1502 | struct list_head *pos, *temp; | |
cd4fcc70 | 1503 | unsigned int data_was_unread; |
1da177e4 | 1504 | |
bb33381d | 1505 | pr_debug("%s: sk:%p, timeout:%ld\n", __func__, sk, timeout); |
1da177e4 | 1506 | |
6dfe4b97 | 1507 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 | 1508 | sk->sk_shutdown = SHUTDOWN_MASK; |
cbabf463 | 1509 | inet_sk_set_state(sk, SCTP_SS_CLOSING); |
1da177e4 LT |
1510 | |
1511 | ep = sctp_sk(sk)->ep; | |
1512 | ||
cd4fcc70 TG |
1513 | /* Clean up any skbs sitting on the receive queue. */ |
1514 | data_was_unread = sctp_queue_purge_ulpevents(&sk->sk_receive_queue); | |
1515 | data_was_unread += sctp_queue_purge_ulpevents(&sctp_sk(sk)->pd_lobby); | |
1516 | ||
61c9fed4 | 1517 | /* Walk all associations on an endpoint. */ |
1da177e4 LT |
1518 | list_for_each_safe(pos, temp, &ep->asocs) { |
1519 | asoc = list_entry(pos, struct sctp_association, asocs); | |
1520 | ||
1521 | if (sctp_style(sk, TCP)) { | |
1522 | /* A closed association can still be in the list if | |
1523 | * it belongs to a TCP-style listening socket that is | |
1524 | * not yet accepted. If so, free it. If not, send an | |
1525 | * ABORT or SHUTDOWN based on the linger options. | |
1526 | */ | |
1527 | if (sctp_state(asoc, CLOSED)) { | |
1da177e4 | 1528 | sctp_association_free(asoc); |
b89498a1 VY |
1529 | continue; |
1530 | } | |
1531 | } | |
1da177e4 | 1532 | |
cd4fcc70 TG |
1533 | if (data_was_unread || !skb_queue_empty(&asoc->ulpq.lobby) || |
1534 | !skb_queue_empty(&asoc->ulpq.reasm) || | |
13228238 | 1535 | !skb_queue_empty(&asoc->ulpq.reasm_uo) || |
cd4fcc70 | 1536 | (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime)) { |
b9ac8672 SS |
1537 | struct sctp_chunk *chunk; |
1538 | ||
1539 | chunk = sctp_make_abort_user(asoc, NULL, 0); | |
068d8bd3 | 1540 | sctp_primitive_ABORT(net, asoc, chunk); |
b9ac8672 | 1541 | } else |
55e26eb9 | 1542 | sctp_primitive_SHUTDOWN(net, asoc, NULL); |
1da177e4 LT |
1543 | } |
1544 | ||
1da177e4 LT |
1545 | /* On a TCP-style socket, block for at most linger_time if set. */ |
1546 | if (sctp_style(sk, TCP) && timeout) | |
1547 | sctp_wait_for_close(sk, timeout); | |
1548 | ||
1549 | /* This will run the backlog queue. */ | |
048ed4b6 | 1550 | release_sock(sk); |
1da177e4 LT |
1551 | |
1552 | /* Supposedly, no process has access to the socket, but | |
1553 | * the net layers still may. | |
2d45a02d MRL |
1554 | * Also, sctp_destroy_sock() needs to be called with addr_wq_lock |
1555 | * held and that should be grabbed before socket lock. | |
1da177e4 | 1556 | */ |
2d45a02d | 1557 | spin_lock_bh(&net->sctp.addr_wq_lock); |
6dfe4b97 | 1558 | bh_lock_sock_nested(sk); |
1da177e4 LT |
1559 | |
1560 | /* Hold the sock, since sk_common_release() will put sock_put() | |
1561 | * and we have just a little more cleanup. | |
1562 | */ | |
1563 | sock_hold(sk); | |
1564 | sk_common_release(sk); | |
1565 | ||
5bc1d1b4 | 1566 | bh_unlock_sock(sk); |
2d45a02d | 1567 | spin_unlock_bh(&net->sctp.addr_wq_lock); |
1da177e4 LT |
1568 | |
1569 | sock_put(sk); | |
1570 | ||
1571 | SCTP_DBG_OBJCNT_DEC(sock); | |
1572 | } | |
1573 | ||
1574 | /* Handle EPIPE error. */ | |
1575 | static int sctp_error(struct sock *sk, int flags, int err) | |
1576 | { | |
1577 | if (err == -EPIPE) | |
1578 | err = sock_error(sk) ? : -EPIPE; | |
1579 | if (err == -EPIPE && !(flags & MSG_NOSIGNAL)) | |
1580 | send_sig(SIGPIPE, current, 0); | |
1581 | return err; | |
1582 | } | |
1583 | ||
1584 | /* API 3.1.3 sendmsg() - UDP Style Syntax | |
1585 | * | |
1586 | * An application uses sendmsg() and recvmsg() calls to transmit data to | |
1587 | * and receive data from its peer. | |
1588 | * | |
1589 | * ssize_t sendmsg(int socket, const struct msghdr *message, | |
1590 | * int flags); | |
1591 | * | |
1592 | * socket - the socket descriptor of the endpoint. | |
1593 | * message - pointer to the msghdr structure which contains a single | |
1594 | * user message and possibly some ancillary data. | |
1595 | * | |
1596 | * See Section 5 for complete description of the data | |
1597 | * structures. | |
1598 | * | |
1599 | * flags - flags sent or received with the user message, see Section | |
1600 | * 5 for complete description of the flags. | |
1601 | * | |
1602 | * Note: This function could use a rewrite especially when explicit | |
1603 | * connect support comes in. | |
1604 | */ | |
1605 | /* BUG: We do not implement the equivalent of sk_stream_wait_memory(). */ | |
1606 | ||
a05437ac XL |
1607 | static int sctp_msghdr_parse(const struct msghdr *msg, |
1608 | struct sctp_cmsgs *cmsgs); | |
1da177e4 | 1609 | |
204f817f XL |
1610 | static int sctp_sendmsg_parse(struct sock *sk, struct sctp_cmsgs *cmsgs, |
1611 | struct sctp_sndrcvinfo *srinfo, | |
1612 | const struct msghdr *msg, size_t msg_len) | |
1613 | { | |
1614 | __u16 sflags; | |
1615 | int err; | |
1616 | ||
1617 | if (sctp_sstate(sk, LISTENING) && sctp_style(sk, TCP)) | |
1618 | return -EPIPE; | |
1619 | ||
1620 | if (msg_len > sk->sk_sndbuf) | |
1621 | return -EMSGSIZE; | |
1622 | ||
1623 | memset(cmsgs, 0, sizeof(*cmsgs)); | |
1624 | err = sctp_msghdr_parse(msg, cmsgs); | |
1625 | if (err) { | |
1626 | pr_debug("%s: msghdr parse err:%x\n", __func__, err); | |
1627 | return err; | |
1628 | } | |
1629 | ||
1630 | memset(srinfo, 0, sizeof(*srinfo)); | |
1631 | if (cmsgs->srinfo) { | |
1632 | srinfo->sinfo_stream = cmsgs->srinfo->sinfo_stream; | |
1633 | srinfo->sinfo_flags = cmsgs->srinfo->sinfo_flags; | |
1634 | srinfo->sinfo_ppid = cmsgs->srinfo->sinfo_ppid; | |
1635 | srinfo->sinfo_context = cmsgs->srinfo->sinfo_context; | |
1636 | srinfo->sinfo_assoc_id = cmsgs->srinfo->sinfo_assoc_id; | |
1637 | srinfo->sinfo_timetolive = cmsgs->srinfo->sinfo_timetolive; | |
1638 | } | |
1639 | ||
1640 | if (cmsgs->sinfo) { | |
1641 | srinfo->sinfo_stream = cmsgs->sinfo->snd_sid; | |
1642 | srinfo->sinfo_flags = cmsgs->sinfo->snd_flags; | |
1643 | srinfo->sinfo_ppid = cmsgs->sinfo->snd_ppid; | |
1644 | srinfo->sinfo_context = cmsgs->sinfo->snd_context; | |
1645 | srinfo->sinfo_assoc_id = cmsgs->sinfo->snd_assoc_id; | |
1646 | } | |
1647 | ||
ed63afb8 XL |
1648 | if (cmsgs->prinfo) { |
1649 | srinfo->sinfo_timetolive = cmsgs->prinfo->pr_value; | |
1650 | SCTP_PR_SET_POLICY(srinfo->sinfo_flags, | |
1651 | cmsgs->prinfo->pr_policy); | |
1652 | } | |
1653 | ||
204f817f XL |
1654 | sflags = srinfo->sinfo_flags; |
1655 | if (!sflags && msg_len) | |
1656 | return 0; | |
1657 | ||
1658 | if (sctp_style(sk, TCP) && (sflags & (SCTP_EOF | SCTP_ABORT))) | |
1659 | return -EINVAL; | |
1660 | ||
1661 | if (((sflags & SCTP_EOF) && msg_len > 0) || | |
1662 | (!(sflags & (SCTP_EOF | SCTP_ABORT)) && msg_len == 0)) | |
1663 | return -EINVAL; | |
1664 | ||
1665 | if ((sflags & SCTP_ADDR_OVER) && !msg->msg_name) | |
1666 | return -EINVAL; | |
1667 | ||
1668 | return 0; | |
1669 | } | |
1670 | ||
2bfd80f9 XL |
1671 | static int sctp_sendmsg_new_asoc(struct sock *sk, __u16 sflags, |
1672 | struct sctp_cmsgs *cmsgs, | |
1673 | union sctp_addr *daddr, | |
1674 | struct sctp_transport **tp) | |
1675 | { | |
1676 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; | |
1677 | struct net *net = sock_net(sk); | |
1678 | struct sctp_association *asoc; | |
1679 | enum sctp_scope scope; | |
2c0dbaa0 | 1680 | struct cmsghdr *cmsg; |
4be4139f | 1681 | __be32 flowinfo = 0; |
9eda2d2d | 1682 | struct sctp_af *af; |
d98985dd | 1683 | int err; |
2bfd80f9 XL |
1684 | |
1685 | *tp = NULL; | |
1686 | ||
1687 | if (sflags & (SCTP_EOF | SCTP_ABORT)) | |
1688 | return -EINVAL; | |
1689 | ||
1690 | if (sctp_style(sk, TCP) && (sctp_sstate(sk, ESTABLISHED) || | |
1691 | sctp_sstate(sk, CLOSING))) | |
1692 | return -EADDRNOTAVAIL; | |
1693 | ||
1694 | if (sctp_endpoint_is_peeled_off(ep, daddr)) | |
1695 | return -EADDRNOTAVAIL; | |
1696 | ||
1697 | if (!ep->base.bind_addr.port) { | |
1698 | if (sctp_autobind(sk)) | |
1699 | return -EAGAIN; | |
1700 | } else { | |
1701 | if (ep->base.bind_addr.port < inet_prot_sock(net) && | |
1702 | !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE)) | |
1703 | return -EACCES; | |
1704 | } | |
1705 | ||
1706 | scope = sctp_scope(daddr); | |
1707 | ||
9eda2d2d LT |
1708 | /* Label connection socket for first association 1-to-many |
1709 | * style for client sequence socket()->sendmsg(). This | |
1710 | * needs to be done before sctp_assoc_add_peer() as that will | |
1711 | * set up the initial packet that needs to account for any | |
1712 | * security ip options (CIPSO/CALIPSO) added to the packet. | |
1713 | */ | |
1714 | af = sctp_get_af_specific(daddr->sa.sa_family); | |
1715 | if (!af) | |
1716 | return -EINVAL; | |
1717 | err = security_sctp_bind_connect(sk, SCTP_SENDMSG_CONNECT, | |
1718 | (struct sockaddr *)daddr, | |
1719 | af->sockaddr_len); | |
1720 | if (err < 0) | |
1721 | return err; | |
1da177e4 | 1722 | |
2bfd80f9 XL |
1723 | asoc = sctp_association_new(ep, sk, scope, GFP_KERNEL); |
1724 | if (!asoc) | |
1725 | return -ENOMEM; | |
1726 | ||
1727 | if (sctp_assoc_set_bind_addr_from_ep(asoc, scope, GFP_KERNEL) < 0) { | |
1728 | err = -ENOMEM; | |
1729 | goto free; | |
1730 | } | |
1731 | ||
1732 | if (cmsgs->init) { | |
1733 | struct sctp_initmsg *init = cmsgs->init; | |
1734 | ||
1735 | if (init->sinit_num_ostreams) { | |
1736 | __u16 outcnt = init->sinit_num_ostreams; | |
1737 | ||
1738 | asoc->c.sinit_num_ostreams = outcnt; | |
1739 | /* outcnt has been changed, need to re-init stream */ | |
1740 | err = sctp_stream_init(&asoc->stream, outcnt, 0, | |
1741 | GFP_KERNEL); | |
1742 | if (err) | |
1743 | goto free; | |
1744 | } | |
1745 | ||
1746 | if (init->sinit_max_instreams) | |
1747 | asoc->c.sinit_max_instreams = init->sinit_max_instreams; | |
1748 | ||
1749 | if (init->sinit_max_attempts) | |
1750 | asoc->max_init_attempts = init->sinit_max_attempts; | |
1751 | ||
1752 | if (init->sinit_max_init_timeo) | |
1753 | asoc->max_init_timeo = | |
1754 | msecs_to_jiffies(init->sinit_max_init_timeo); | |
1755 | } | |
1756 | ||
1757 | *tp = sctp_assoc_add_peer(asoc, daddr, GFP_KERNEL, SCTP_UNKNOWN); | |
1758 | if (!*tp) { | |
1759 | err = -ENOMEM; | |
1760 | goto free; | |
1761 | } | |
1762 | ||
2c0dbaa0 XL |
1763 | if (!cmsgs->addrs_msg) |
1764 | return 0; | |
1765 | ||
4be4139f XL |
1766 | if (daddr->sa.sa_family == AF_INET6) |
1767 | flowinfo = daddr->v6.sin6_flowinfo; | |
1768 | ||
2c0dbaa0 XL |
1769 | /* sendv addr list parse */ |
1770 | for_each_cmsghdr(cmsg, cmsgs->addrs_msg) { | |
1771 | struct sctp_transport *transport; | |
1772 | struct sctp_association *old; | |
1773 | union sctp_addr _daddr; | |
1774 | int dlen; | |
1775 | ||
1776 | if (cmsg->cmsg_level != IPPROTO_SCTP || | |
1777 | (cmsg->cmsg_type != SCTP_DSTADDRV4 && | |
1778 | cmsg->cmsg_type != SCTP_DSTADDRV6)) | |
1779 | continue; | |
1780 | ||
1781 | daddr = &_daddr; | |
1782 | memset(daddr, 0, sizeof(*daddr)); | |
1783 | dlen = cmsg->cmsg_len - sizeof(struct cmsghdr); | |
1784 | if (cmsg->cmsg_type == SCTP_DSTADDRV4) { | |
d98985dd WY |
1785 | if (dlen < sizeof(struct in_addr)) { |
1786 | err = -EINVAL; | |
2c0dbaa0 | 1787 | goto free; |
d98985dd | 1788 | } |
2c0dbaa0 XL |
1789 | |
1790 | dlen = sizeof(struct in_addr); | |
1791 | daddr->v4.sin_family = AF_INET; | |
1792 | daddr->v4.sin_port = htons(asoc->peer.port); | |
1793 | memcpy(&daddr->v4.sin_addr, CMSG_DATA(cmsg), dlen); | |
1794 | } else { | |
d98985dd WY |
1795 | if (dlen < sizeof(struct in6_addr)) { |
1796 | err = -EINVAL; | |
2c0dbaa0 | 1797 | goto free; |
d98985dd | 1798 | } |
2c0dbaa0 XL |
1799 | |
1800 | dlen = sizeof(struct in6_addr); | |
4be4139f | 1801 | daddr->v6.sin6_flowinfo = flowinfo; |
2c0dbaa0 XL |
1802 | daddr->v6.sin6_family = AF_INET6; |
1803 | daddr->v6.sin6_port = htons(asoc->peer.port); | |
1804 | memcpy(&daddr->v6.sin6_addr, CMSG_DATA(cmsg), dlen); | |
1805 | } | |
1806 | err = sctp_verify_addr(sk, daddr, sizeof(*daddr)); | |
1807 | if (err) | |
1808 | goto free; | |
1809 | ||
1810 | old = sctp_endpoint_lookup_assoc(ep, daddr, &transport); | |
1811 | if (old && old != asoc) { | |
1812 | if (old->state >= SCTP_STATE_ESTABLISHED) | |
1813 | err = -EISCONN; | |
1814 | else | |
1815 | err = -EALREADY; | |
1816 | goto free; | |
1817 | } | |
1818 | ||
1819 | if (sctp_endpoint_is_peeled_off(ep, daddr)) { | |
1820 | err = -EADDRNOTAVAIL; | |
1821 | goto free; | |
1822 | } | |
1823 | ||
1824 | transport = sctp_assoc_add_peer(asoc, daddr, GFP_KERNEL, | |
1825 | SCTP_UNKNOWN); | |
1826 | if (!transport) { | |
1827 | err = -ENOMEM; | |
1828 | goto free; | |
1829 | } | |
1830 | } | |
1831 | ||
2bfd80f9 XL |
1832 | return 0; |
1833 | ||
1834 | free: | |
1835 | sctp_association_free(asoc); | |
1836 | return err; | |
1837 | } | |
1838 | ||
c2666de1 XL |
1839 | static int sctp_sendmsg_check_sflags(struct sctp_association *asoc, |
1840 | __u16 sflags, struct msghdr *msg, | |
1841 | size_t msg_len) | |
1842 | { | |
1843 | struct sock *sk = asoc->base.sk; | |
1844 | struct net *net = sock_net(sk); | |
1845 | ||
1846 | if (sctp_state(asoc, CLOSED) && sctp_style(sk, TCP)) | |
1847 | return -EPIPE; | |
1848 | ||
49102805 XL |
1849 | if ((sflags & SCTP_SENDALL) && sctp_style(sk, UDP) && |
1850 | !sctp_state(asoc, ESTABLISHED)) | |
1851 | return 0; | |
1852 | ||
c2666de1 XL |
1853 | if (sflags & SCTP_EOF) { |
1854 | pr_debug("%s: shutting down association:%p\n", __func__, asoc); | |
1855 | sctp_primitive_SHUTDOWN(net, asoc, NULL); | |
1856 | ||
1857 | return 0; | |
1858 | } | |
1859 | ||
1860 | if (sflags & SCTP_ABORT) { | |
1861 | struct sctp_chunk *chunk; | |
1862 | ||
1863 | chunk = sctp_make_abort_user(asoc, msg, msg_len); | |
1864 | if (!chunk) | |
1865 | return -ENOMEM; | |
1866 | ||
1867 | pr_debug("%s: aborting association:%p\n", __func__, asoc); | |
1868 | sctp_primitive_ABORT(net, asoc, chunk); | |
1869 | ||
1870 | return 0; | |
1871 | } | |
1872 | ||
1873 | return 1; | |
1874 | } | |
1875 | ||
f84af331 XL |
1876 | static int sctp_sendmsg_to_asoc(struct sctp_association *asoc, |
1877 | struct msghdr *msg, size_t msg_len, | |
1878 | struct sctp_transport *transport, | |
1879 | struct sctp_sndrcvinfo *sinfo) | |
1880 | { | |
1881 | struct sock *sk = asoc->base.sk; | |
63d01330 | 1882 | struct sctp_sock *sp = sctp_sk(sk); |
f84af331 XL |
1883 | struct net *net = sock_net(sk); |
1884 | struct sctp_datamsg *datamsg; | |
1885 | bool wait_connect = false; | |
1886 | struct sctp_chunk *chunk; | |
1887 | long timeo; | |
1888 | int err; | |
1889 | ||
1890 | if (sinfo->sinfo_stream >= asoc->stream.outcnt) { | |
1891 | err = -EINVAL; | |
1892 | goto err; | |
1893 | } | |
1894 | ||
05364ca0 | 1895 | if (unlikely(!SCTP_SO(&asoc->stream, sinfo->sinfo_stream)->ext)) { |
f84af331 XL |
1896 | err = sctp_stream_init_ext(&asoc->stream, sinfo->sinfo_stream); |
1897 | if (err) | |
1898 | goto err; | |
1899 | } | |
1900 | ||
63d01330 | 1901 | if (sp->disable_fragments && msg_len > asoc->frag_point) { |
f84af331 XL |
1902 | err = -EMSGSIZE; |
1903 | goto err; | |
1904 | } | |
1905 | ||
2521680e | 1906 | if (asoc->pmtu_pending) { |
63d01330 MRL |
1907 | if (sp->param_flags & SPP_PMTUD_ENABLE) |
1908 | sctp_assoc_sync_pmtu(asoc); | |
2521680e MRL |
1909 | asoc->pmtu_pending = 0; |
1910 | } | |
0aee4c25 | 1911 | |
cd305c74 | 1912 | if (sctp_wspace(asoc) < (int)msg_len) |
0aee4c25 NH |
1913 | sctp_prsctp_prune(asoc, sinfo, msg_len - sctp_wspace(asoc)); |
1914 | ||
cd305c74 | 1915 | if (sctp_wspace(asoc) <= 0) { |
0aee4c25 NH |
1916 | timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT); |
1917 | err = sctp_wait_for_sndbuf(asoc, &timeo, msg_len); | |
1918 | if (err) | |
1919 | goto err; | |
1920 | } | |
1921 | ||
f84af331 XL |
1922 | if (sctp_state(asoc, CLOSED)) { |
1923 | err = sctp_primitive_ASSOCIATE(net, asoc, NULL); | |
1924 | if (err) | |
1925 | goto err; | |
1926 | ||
63d01330 | 1927 | if (sp->strm_interleave) { |
f84af331 XL |
1928 | timeo = sock_sndtimeo(sk, 0); |
1929 | err = sctp_wait_for_connect(asoc, &timeo); | |
c863850c XL |
1930 | if (err) { |
1931 | err = -ESRCH; | |
f84af331 | 1932 | goto err; |
c863850c | 1933 | } |
f84af331 XL |
1934 | } else { |
1935 | wait_connect = true; | |
1936 | } | |
1937 | ||
1938 | pr_debug("%s: we associated primitively\n", __func__); | |
1939 | } | |
1940 | ||
f84af331 XL |
1941 | datamsg = sctp_datamsg_from_user(asoc, sinfo, &msg->msg_iter); |
1942 | if (IS_ERR(datamsg)) { | |
1943 | err = PTR_ERR(datamsg); | |
1944 | goto err; | |
1945 | } | |
1946 | ||
1947 | asoc->force_delay = !!(msg->msg_flags & MSG_MORE); | |
1948 | ||
1949 | list_for_each_entry(chunk, &datamsg->chunks, frag_list) { | |
1950 | sctp_chunk_hold(chunk); | |
1951 | sctp_set_owner_w(chunk); | |
1952 | chunk->transport = transport; | |
1953 | } | |
1954 | ||
1955 | err = sctp_primitive_SEND(net, asoc, datamsg); | |
1956 | if (err) { | |
1957 | sctp_datamsg_free(datamsg); | |
1958 | goto err; | |
1959 | } | |
1960 | ||
1961 | pr_debug("%s: we sent primitively\n", __func__); | |
1962 | ||
1963 | sctp_datamsg_put(datamsg); | |
1964 | ||
1965 | if (unlikely(wait_connect)) { | |
1966 | timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT); | |
1967 | sctp_wait_for_connect(asoc, &timeo); | |
1968 | } | |
1969 | ||
1970 | err = msg_len; | |
1971 | ||
1972 | err: | |
1973 | return err; | |
1974 | } | |
1975 | ||
becef9b1 XL |
1976 | static union sctp_addr *sctp_sendmsg_get_daddr(struct sock *sk, |
1977 | const struct msghdr *msg, | |
1978 | struct sctp_cmsgs *cmsgs) | |
1979 | { | |
1980 | union sctp_addr *daddr = NULL; | |
1981 | int err; | |
1982 | ||
1983 | if (!sctp_style(sk, UDP_HIGH_BANDWIDTH) && msg->msg_name) { | |
1984 | int len = msg->msg_namelen; | |
1985 | ||
1986 | if (len > sizeof(*daddr)) | |
1987 | len = sizeof(*daddr); | |
1988 | ||
1989 | daddr = (union sctp_addr *)msg->msg_name; | |
1990 | ||
1991 | err = sctp_verify_addr(sk, daddr, len); | |
1992 | if (err) | |
1993 | return ERR_PTR(err); | |
1994 | } | |
1995 | ||
1996 | return daddr; | |
1997 | } | |
1998 | ||
d42cb06e XL |
1999 | static void sctp_sendmsg_update_sinfo(struct sctp_association *asoc, |
2000 | struct sctp_sndrcvinfo *sinfo, | |
2001 | struct sctp_cmsgs *cmsgs) | |
2002 | { | |
2003 | if (!cmsgs->srinfo && !cmsgs->sinfo) { | |
2004 | sinfo->sinfo_stream = asoc->default_stream; | |
2005 | sinfo->sinfo_ppid = asoc->default_ppid; | |
2006 | sinfo->sinfo_context = asoc->default_context; | |
2007 | sinfo->sinfo_assoc_id = sctp_assoc2id(asoc); | |
ed63afb8 XL |
2008 | |
2009 | if (!cmsgs->prinfo) | |
2010 | sinfo->sinfo_flags = asoc->default_flags; | |
d42cb06e XL |
2011 | } |
2012 | ||
ed63afb8 | 2013 | if (!cmsgs->srinfo && !cmsgs->prinfo) |
d42cb06e | 2014 | sinfo->sinfo_timetolive = asoc->default_timetolive; |
3ff547c0 XL |
2015 | |
2016 | if (cmsgs->authinfo) { | |
2017 | /* Reuse sinfo_tsn to indicate that authinfo was set and | |
2018 | * sinfo_ssn to save the keyid on tx path. | |
2019 | */ | |
2020 | sinfo->sinfo_tsn = 1; | |
2021 | sinfo->sinfo_ssn = cmsgs->authinfo->auth_keynumber; | |
2022 | } | |
d42cb06e XL |
2023 | } |
2024 | ||
1b784140 | 2025 | static int sctp_sendmsg(struct sock *sk, struct msghdr *msg, size_t msg_len) |
1da177e4 | 2026 | { |
204f817f | 2027 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
8e87c6eb | 2028 | struct sctp_transport *transport = NULL; |
204f817f | 2029 | struct sctp_sndrcvinfo _sinfo, *sinfo; |
ba59fb02 | 2030 | struct sctp_association *asoc, *tmp; |
007b7e18 | 2031 | struct sctp_cmsgs cmsgs; |
becef9b1 | 2032 | union sctp_addr *daddr; |
007b7e18 XL |
2033 | bool new = false; |
2034 | __u16 sflags; | |
63b94938 | 2035 | int err; |
1da177e4 | 2036 | |
204f817f XL |
2037 | /* Parse and get snd_info */ |
2038 | err = sctp_sendmsg_parse(sk, &cmsgs, &_sinfo, msg, msg_len); | |
2039 | if (err) | |
007b7e18 | 2040 | goto out; |
1da177e4 | 2041 | |
204f817f | 2042 | sinfo = &_sinfo; |
007b7e18 | 2043 | sflags = sinfo->sinfo_flags; |
1da177e4 | 2044 | |
becef9b1 XL |
2045 | /* Get daddr from msg */ |
2046 | daddr = sctp_sendmsg_get_daddr(sk, msg, &cmsgs); | |
2047 | if (IS_ERR(daddr)) { | |
2048 | err = PTR_ERR(daddr); | |
007b7e18 | 2049 | goto out; |
1da177e4 LT |
2050 | } |
2051 | ||
048ed4b6 | 2052 | lock_sock(sk); |
1da177e4 | 2053 | |
49102805 XL |
2054 | /* SCTP_SENDALL process */ |
2055 | if ((sflags & SCTP_SENDALL) && sctp_style(sk, UDP)) { | |
ba59fb02 | 2056 | list_for_each_entry_safe(asoc, tmp, &ep->asocs, asocs) { |
49102805 XL |
2057 | err = sctp_sendmsg_check_sflags(asoc, sflags, msg, |
2058 | msg_len); | |
2059 | if (err == 0) | |
2060 | continue; | |
2061 | if (err < 0) | |
2062 | goto out_unlock; | |
2063 | ||
2064 | sctp_sendmsg_update_sinfo(asoc, sinfo, &cmsgs); | |
2065 | ||
2066 | err = sctp_sendmsg_to_asoc(asoc, msg, msg_len, | |
2067 | NULL, sinfo); | |
2068 | if (err < 0) | |
2069 | goto out_unlock; | |
2070 | ||
2071 | iov_iter_revert(&msg->msg_iter, err); | |
2072 | } | |
2073 | ||
2074 | goto out_unlock; | |
2075 | } | |
2076 | ||
0a3920d2 | 2077 | /* Get and check or create asoc */ |
becef9b1 | 2078 | if (daddr) { |
becef9b1 | 2079 | asoc = sctp_endpoint_lookup_assoc(ep, daddr, &transport); |
0a3920d2 XL |
2080 | if (asoc) { |
2081 | err = sctp_sendmsg_check_sflags(asoc, sflags, msg, | |
2082 | msg_len); | |
2083 | if (err <= 0) | |
2084 | goto out_unlock; | |
2085 | } else { | |
2086 | err = sctp_sendmsg_new_asoc(sk, sflags, &cmsgs, daddr, | |
2087 | &transport); | |
2088 | if (err) | |
2089 | goto out_unlock; | |
2090 | ||
2091 | asoc = transport->asoc; | |
2092 | new = true; | |
2093 | } | |
2094 | ||
2095 | if (!sctp_style(sk, TCP) && !(sflags & SCTP_ADDR_OVER)) | |
2096 | transport = NULL; | |
1da177e4 | 2097 | } else { |
007b7e18 | 2098 | asoc = sctp_id2assoc(sk, sinfo->sinfo_assoc_id); |
1da177e4 LT |
2099 | if (!asoc) { |
2100 | err = -EPIPE; | |
2101 | goto out_unlock; | |
2102 | } | |
1da177e4 | 2103 | |
007b7e18 | 2104 | err = sctp_sendmsg_check_sflags(asoc, sflags, msg, msg_len); |
c2666de1 | 2105 | if (err <= 0) |
1da177e4 | 2106 | goto out_unlock; |
1da177e4 LT |
2107 | } |
2108 | ||
d42cb06e XL |
2109 | /* Update snd_info with the asoc */ |
2110 | sctp_sendmsg_update_sinfo(asoc, sinfo, &cmsgs); | |
1da177e4 | 2111 | |
f84af331 | 2112 | /* Send msg to the asoc */ |
8e87c6eb | 2113 | err = sctp_sendmsg_to_asoc(asoc, msg, msg_len, transport, sinfo); |
007b7e18 | 2114 | if (err < 0 && err != -ESRCH && new) |
1da177e4 | 2115 | sctp_association_free(asoc); |
8e87c6eb | 2116 | |
1da177e4 | 2117 | out_unlock: |
048ed4b6 | 2118 | release_sock(sk); |
007b7e18 | 2119 | out: |
f84af331 | 2120 | return sctp_error(sk, msg->msg_flags, err); |
1da177e4 LT |
2121 | } |
2122 | ||
2123 | /* This is an extended version of skb_pull() that removes the data from the | |
2124 | * start of a skb even when data is spread across the list of skb's in the | |
2125 | * frag_list. len specifies the total amount of data that needs to be removed. | |
2126 | * when 'len' bytes could be removed from the skb, it returns 0. | |
2127 | * If 'len' exceeds the total skb length, it returns the no. of bytes that | |
2128 | * could not be removed. | |
2129 | */ | |
2130 | static int sctp_skb_pull(struct sk_buff *skb, int len) | |
2131 | { | |
2132 | struct sk_buff *list; | |
2133 | int skb_len = skb_headlen(skb); | |
2134 | int rlen; | |
2135 | ||
2136 | if (len <= skb_len) { | |
2137 | __skb_pull(skb, len); | |
2138 | return 0; | |
2139 | } | |
2140 | len -= skb_len; | |
2141 | __skb_pull(skb, skb_len); | |
2142 | ||
1b003be3 | 2143 | skb_walk_frags(skb, list) { |
1da177e4 LT |
2144 | rlen = sctp_skb_pull(list, len); |
2145 | skb->len -= (len-rlen); | |
2146 | skb->data_len -= (len-rlen); | |
2147 | ||
2148 | if (!rlen) | |
2149 | return 0; | |
2150 | ||
2151 | len = rlen; | |
2152 | } | |
2153 | ||
2154 | return len; | |
2155 | } | |
2156 | ||
2157 | /* API 3.1.3 recvmsg() - UDP Style Syntax | |
2158 | * | |
2159 | * ssize_t recvmsg(int socket, struct msghdr *message, | |
2160 | * int flags); | |
2161 | * | |
2162 | * socket - the socket descriptor of the endpoint. | |
2163 | * message - pointer to the msghdr structure which contains a single | |
2164 | * user message and possibly some ancillary data. | |
2165 | * | |
2166 | * See Section 5 for complete description of the data | |
2167 | * structures. | |
2168 | * | |
2169 | * flags - flags sent or received with the user message, see Section | |
2170 | * 5 for complete description of the flags. | |
2171 | */ | |
1b784140 YX |
2172 | static int sctp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, |
2173 | int noblock, int flags, int *addr_len) | |
1da177e4 LT |
2174 | { |
2175 | struct sctp_ulpevent *event = NULL; | |
2176 | struct sctp_sock *sp = sctp_sk(sk); | |
1f45f78f | 2177 | struct sk_buff *skb, *head_skb; |
1da177e4 LT |
2178 | int copied; |
2179 | int err = 0; | |
2180 | int skb_len; | |
2181 | ||
bb33381d DB |
2182 | pr_debug("%s: sk:%p, msghdr:%p, len:%zd, noblock:%d, flags:0x%x, " |
2183 | "addr_len:%p)\n", __func__, sk, msg, len, noblock, flags, | |
2184 | addr_len); | |
1da177e4 | 2185 | |
048ed4b6 | 2186 | lock_sock(sk); |
1da177e4 | 2187 | |
e5b13f34 | 2188 | if (sctp_style(sk, TCP) && !sctp_sstate(sk, ESTABLISHED) && |
e0878694 | 2189 | !sctp_sstate(sk, CLOSING) && !sctp_sstate(sk, CLOSED)) { |
1da177e4 LT |
2190 | err = -ENOTCONN; |
2191 | goto out; | |
2192 | } | |
2193 | ||
2194 | skb = sctp_skb_recv_datagram(sk, flags, noblock, &err); | |
2195 | if (!skb) | |
2196 | goto out; | |
2197 | ||
2198 | /* Get the total length of the skb including any skb's in the | |
2199 | * frag_list. | |
2200 | */ | |
2201 | skb_len = skb->len; | |
2202 | ||
2203 | copied = skb_len; | |
2204 | if (copied > len) | |
2205 | copied = len; | |
2206 | ||
51f3d02b | 2207 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
1da177e4 LT |
2208 | |
2209 | event = sctp_skb2event(skb); | |
2210 | ||
2211 | if (err) | |
2212 | goto out_free; | |
2213 | ||
1f45f78f MRL |
2214 | if (event->chunk && event->chunk->head_skb) |
2215 | head_skb = event->chunk->head_skb; | |
2216 | else | |
2217 | head_skb = skb; | |
2218 | sock_recv_ts_and_drops(msg, sk, head_skb); | |
1da177e4 LT |
2219 | if (sctp_ulpevent_is_notification(event)) { |
2220 | msg->msg_flags |= MSG_NOTIFICATION; | |
2221 | sp->pf->event_msgname(event, msg->msg_name, addr_len); | |
2222 | } else { | |
1f45f78f | 2223 | sp->pf->skb_msgname(head_skb, msg->msg_name, addr_len); |
1da177e4 LT |
2224 | } |
2225 | ||
2347c80f GOV |
2226 | /* Check if we allow SCTP_NXTINFO. */ |
2227 | if (sp->recvnxtinfo) | |
2228 | sctp_ulpevent_read_nxtinfo(event, msg, sk); | |
0d3a421d GOV |
2229 | /* Check if we allow SCTP_RCVINFO. */ |
2230 | if (sp->recvrcvinfo) | |
2231 | sctp_ulpevent_read_rcvinfo(event, msg); | |
1da177e4 | 2232 | /* Check if we allow SCTP_SNDRCVINFO. */ |
2cc0eeb6 | 2233 | if (sctp_ulpevent_type_enabled(sp->subscribe, SCTP_DATA_IO_EVENT)) |
1da177e4 | 2234 | sctp_ulpevent_read_sndrcvinfo(event, msg); |
0d3a421d | 2235 | |
1da177e4 LT |
2236 | err = copied; |
2237 | ||
2238 | /* If skb's length exceeds the user's buffer, update the skb and | |
2239 | * push it back to the receive_queue so that the next call to | |
2240 | * recvmsg() will return the remaining data. Don't set MSG_EOR. | |
2241 | */ | |
2242 | if (skb_len > copied) { | |
2243 | msg->msg_flags &= ~MSG_EOR; | |
2244 | if (flags & MSG_PEEK) | |
2245 | goto out_free; | |
2246 | sctp_skb_pull(skb, copied); | |
2247 | skb_queue_head(&sk->sk_receive_queue, skb); | |
2248 | ||
362d5204 DB |
2249 | /* When only partial message is copied to the user, increase |
2250 | * rwnd by that amount. If all the data in the skb is read, | |
2251 | * rwnd is updated when the event is freed. | |
2252 | */ | |
2253 | if (!sctp_ulpevent_is_notification(event)) | |
2254 | sctp_assoc_rwnd_increase(event->asoc, copied); | |
1da177e4 LT |
2255 | goto out; |
2256 | } else if ((event->msg_flags & MSG_NOTIFICATION) || | |
2257 | (event->msg_flags & MSG_EOR)) | |
2258 | msg->msg_flags |= MSG_EOR; | |
2259 | else | |
2260 | msg->msg_flags &= ~MSG_EOR; | |
2261 | ||
2262 | out_free: | |
2263 | if (flags & MSG_PEEK) { | |
2264 | /* Release the skb reference acquired after peeking the skb in | |
2265 | * sctp_skb_recv_datagram(). | |
2266 | */ | |
2267 | kfree_skb(skb); | |
2268 | } else { | |
2269 | /* Free the event which includes releasing the reference to | |
2270 | * the owner of the skb, freeing the skb and updating the | |
2271 | * rwnd. | |
2272 | */ | |
2273 | sctp_ulpevent_free(event); | |
2274 | } | |
2275 | out: | |
048ed4b6 | 2276 | release_sock(sk); |
1da177e4 LT |
2277 | return err; |
2278 | } | |
2279 | ||
2280 | /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS) | |
2281 | * | |
2282 | * This option is a on/off flag. If enabled no SCTP message | |
2283 | * fragmentation will be performed. Instead if a message being sent | |
2284 | * exceeds the current PMTU size, the message will NOT be sent and | |
2285 | * instead a error will be indicated to the user. | |
2286 | */ | |
2287 | static int sctp_setsockopt_disable_fragments(struct sock *sk, | |
b7058842 DM |
2288 | char __user *optval, |
2289 | unsigned int optlen) | |
1da177e4 LT |
2290 | { |
2291 | int val; | |
2292 | ||
2293 | if (optlen < sizeof(int)) | |
2294 | return -EINVAL; | |
2295 | ||
2296 | if (get_user(val, (int __user *)optval)) | |
2297 | return -EFAULT; | |
2298 | ||
2299 | sctp_sk(sk)->disable_fragments = (val == 0) ? 0 : 1; | |
2300 | ||
2301 | return 0; | |
2302 | } | |
2303 | ||
2304 | static int sctp_setsockopt_events(struct sock *sk, char __user *optval, | |
b7058842 | 2305 | unsigned int optlen) |
1da177e4 | 2306 | { |
2cc0eeb6 XL |
2307 | struct sctp_event_subscribe subscribe; |
2308 | __u8 *sn_type = (__u8 *)&subscribe; | |
2309 | struct sctp_sock *sp = sctp_sk(sk); | |
a1e3a059 | 2310 | struct sctp_association *asoc; |
2cc0eeb6 | 2311 | int i; |
94912301 | 2312 | |
7e8616d8 | 2313 | if (optlen > sizeof(struct sctp_event_subscribe)) |
1da177e4 | 2314 | return -EINVAL; |
2cc0eeb6 XL |
2315 | |
2316 | if (copy_from_user(&subscribe, optval, optlen)) | |
1da177e4 | 2317 | return -EFAULT; |
94912301 | 2318 | |
2cc0eeb6 XL |
2319 | for (i = 0; i < optlen; i++) |
2320 | sctp_ulpevent_type_set(&sp->subscribe, SCTP_SN_TYPE_BASE + i, | |
2321 | sn_type[i]); | |
2322 | ||
a1e3a059 XL |
2323 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) |
2324 | asoc->subscribe = sctp_sk(sk)->subscribe; | |
2325 | ||
bbbea41d | 2326 | /* At the time when a user app subscribes to SCTP_SENDER_DRY_EVENT, |
94912301 WY |
2327 | * if there is no data to be sent or retransmit, the stack will |
2328 | * immediately send up this notification. | |
2329 | */ | |
2cc0eeb6 | 2330 | if (sctp_ulpevent_type_enabled(sp->subscribe, SCTP_SENDER_DRY_EVENT)) { |
2cc0eeb6 | 2331 | struct sctp_ulpevent *event; |
94912301 | 2332 | |
a1e3a059 | 2333 | asoc = sctp_id2assoc(sk, 0); |
94912301 WY |
2334 | if (asoc && sctp_outq_is_empty(&asoc->outqueue)) { |
2335 | event = sctp_ulpevent_make_sender_dry_event(asoc, | |
2e83acb9 | 2336 | GFP_USER | __GFP_NOWARN); |
94912301 WY |
2337 | if (!event) |
2338 | return -ENOMEM; | |
2339 | ||
9162e0ed | 2340 | asoc->stream.si->enqueue_event(&asoc->ulpq, event); |
94912301 WY |
2341 | } |
2342 | } | |
2343 | ||
1da177e4 LT |
2344 | return 0; |
2345 | } | |
2346 | ||
2347 | /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE) | |
2348 | * | |
2349 | * This socket option is applicable to the UDP-style socket only. When | |
2350 | * set it will cause associations that are idle for more than the | |
2351 | * specified number of seconds to automatically close. An association | |
2352 | * being idle is defined an association that has NOT sent or received | |
2353 | * user data. The special value of '0' indicates that no automatic | |
2354 | * close of any associations should be performed. The option expects an | |
2355 | * integer defining the number of seconds of idle time before an | |
2356 | * association is closed. | |
2357 | */ | |
2358 | static int sctp_setsockopt_autoclose(struct sock *sk, char __user *optval, | |
b7058842 | 2359 | unsigned int optlen) |
1da177e4 LT |
2360 | { |
2361 | struct sctp_sock *sp = sctp_sk(sk); | |
9f70f46b | 2362 | struct net *net = sock_net(sk); |
1da177e4 LT |
2363 | |
2364 | /* Applicable to UDP-style socket only */ | |
2365 | if (sctp_style(sk, TCP)) | |
2366 | return -EOPNOTSUPP; | |
2367 | if (optlen != sizeof(int)) | |
2368 | return -EINVAL; | |
2369 | if (copy_from_user(&sp->autoclose, optval, optlen)) | |
2370 | return -EFAULT; | |
2371 | ||
9f70f46b NH |
2372 | if (sp->autoclose > net->sctp.max_autoclose) |
2373 | sp->autoclose = net->sctp.max_autoclose; | |
2374 | ||
1da177e4 LT |
2375 | return 0; |
2376 | } | |
2377 | ||
2378 | /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS) | |
2379 | * | |
2380 | * Applications can enable or disable heartbeats for any peer address of | |
2381 | * an association, modify an address's heartbeat interval, force a | |
2382 | * heartbeat to be sent immediately, and adjust the address's maximum | |
2383 | * number of retransmissions sent before an address is considered | |
2384 | * unreachable. The following structure is used to access and modify an | |
2385 | * address's parameters: | |
2386 | * | |
2387 | * struct sctp_paddrparams { | |
52ccb8e9 FF |
2388 | * sctp_assoc_t spp_assoc_id; |
2389 | * struct sockaddr_storage spp_address; | |
2390 | * uint32_t spp_hbinterval; | |
2391 | * uint16_t spp_pathmaxrxt; | |
2392 | * uint32_t spp_pathmtu; | |
2393 | * uint32_t spp_sackdelay; | |
2394 | * uint32_t spp_flags; | |
0b0dce7a XL |
2395 | * uint32_t spp_ipv6_flowlabel; |
2396 | * uint8_t spp_dscp; | |
52ccb8e9 FF |
2397 | * }; |
2398 | * | |
2399 | * spp_assoc_id - (one-to-many style socket) This is filled in the | |
2400 | * application, and identifies the association for | |
2401 | * this query. | |
1da177e4 LT |
2402 | * spp_address - This specifies which address is of interest. |
2403 | * spp_hbinterval - This contains the value of the heartbeat interval, | |
52ccb8e9 FF |
2404 | * in milliseconds. If a value of zero |
2405 | * is present in this field then no changes are to | |
2406 | * be made to this parameter. | |
1da177e4 LT |
2407 | * spp_pathmaxrxt - This contains the maximum number of |
2408 | * retransmissions before this address shall be | |
52ccb8e9 FF |
2409 | * considered unreachable. If a value of zero |
2410 | * is present in this field then no changes are to | |
2411 | * be made to this parameter. | |
2412 | * spp_pathmtu - When Path MTU discovery is disabled the value | |
2413 | * specified here will be the "fixed" path mtu. | |
2414 | * Note that if the spp_address field is empty | |
2415 | * then all associations on this address will | |
2416 | * have this fixed path mtu set upon them. | |
2417 | * | |
2418 | * spp_sackdelay - When delayed sack is enabled, this value specifies | |
2419 | * the number of milliseconds that sacks will be delayed | |
2420 | * for. This value will apply to all addresses of an | |
2421 | * association if the spp_address field is empty. Note | |
2422 | * also, that if delayed sack is enabled and this | |
2423 | * value is set to 0, no change is made to the last | |
2424 | * recorded delayed sack timer value. | |
2425 | * | |
2426 | * spp_flags - These flags are used to control various features | |
2427 | * on an association. The flag field may contain | |
2428 | * zero or more of the following options. | |
2429 | * | |
2430 | * SPP_HB_ENABLE - Enable heartbeats on the | |
2431 | * specified address. Note that if the address | |
2432 | * field is empty all addresses for the association | |
2433 | * have heartbeats enabled upon them. | |
2434 | * | |
2435 | * SPP_HB_DISABLE - Disable heartbeats on the | |
2436 | * speicifed address. Note that if the address | |
2437 | * field is empty all addresses for the association | |
2438 | * will have their heartbeats disabled. Note also | |
2439 | * that SPP_HB_ENABLE and SPP_HB_DISABLE are | |
2440 | * mutually exclusive, only one of these two should | |
2441 | * be specified. Enabling both fields will have | |
2442 | * undetermined results. | |
2443 | * | |
2444 | * SPP_HB_DEMAND - Request a user initiated heartbeat | |
2445 | * to be made immediately. | |
2446 | * | |
bdf3092a VY |
2447 | * SPP_HB_TIME_IS_ZERO - Specify's that the time for |
2448 | * heartbeat delayis to be set to the value of 0 | |
2449 | * milliseconds. | |
2450 | * | |
52ccb8e9 FF |
2451 | * SPP_PMTUD_ENABLE - This field will enable PMTU |
2452 | * discovery upon the specified address. Note that | |
2453 | * if the address feild is empty then all addresses | |
2454 | * on the association are effected. | |
2455 | * | |
2456 | * SPP_PMTUD_DISABLE - This field will disable PMTU | |
2457 | * discovery upon the specified address. Note that | |
2458 | * if the address feild is empty then all addresses | |
2459 | * on the association are effected. Not also that | |
2460 | * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually | |
2461 | * exclusive. Enabling both will have undetermined | |
2462 | * results. | |
2463 | * | |
2464 | * SPP_SACKDELAY_ENABLE - Setting this flag turns | |
2465 | * on delayed sack. The time specified in spp_sackdelay | |
2466 | * is used to specify the sack delay for this address. Note | |
2467 | * that if spp_address is empty then all addresses will | |
2468 | * enable delayed sack and take on the sack delay | |
2469 | * value specified in spp_sackdelay. | |
2470 | * SPP_SACKDELAY_DISABLE - Setting this flag turns | |
2471 | * off delayed sack. If the spp_address field is blank then | |
2472 | * delayed sack is disabled for the entire association. Note | |
2473 | * also that this field is mutually exclusive to | |
2474 | * SPP_SACKDELAY_ENABLE, setting both will have undefined | |
2475 | * results. | |
0b0dce7a XL |
2476 | * |
2477 | * SPP_IPV6_FLOWLABEL: Setting this flag enables the | |
2478 | * setting of the IPV6 flow label value. The value is | |
2479 | * contained in the spp_ipv6_flowlabel field. | |
2480 | * Upon retrieval, this flag will be set to indicate that | |
2481 | * the spp_ipv6_flowlabel field has a valid value returned. | |
2482 | * If a specific destination address is set (in the | |
2483 | * spp_address field), then the value returned is that of | |
2484 | * the address. If just an association is specified (and | |
2485 | * no address), then the association's default flow label | |
2486 | * is returned. If neither an association nor a destination | |
2487 | * is specified, then the socket's default flow label is | |
2488 | * returned. For non-IPv6 sockets, this flag will be left | |
2489 | * cleared. | |
2490 | * | |
2491 | * SPP_DSCP: Setting this flag enables the setting of the | |
2492 | * Differentiated Services Code Point (DSCP) value | |
2493 | * associated with either the association or a specific | |
2494 | * address. The value is obtained in the spp_dscp field. | |
2495 | * Upon retrieval, this flag will be set to indicate that | |
2496 | * the spp_dscp field has a valid value returned. If a | |
2497 | * specific destination address is set when called (in the | |
2498 | * spp_address field), then that specific destination | |
2499 | * address's DSCP value is returned. If just an association | |
2500 | * is specified, then the association's default DSCP is | |
2501 | * returned. If neither an association nor a destination is | |
2502 | * specified, then the socket's default DSCP is returned. | |
2503 | * | |
2504 | * spp_ipv6_flowlabel | |
2505 | * - This field is used in conjunction with the | |
2506 | * SPP_IPV6_FLOWLABEL flag and contains the IPv6 flow label. | |
2507 | * The 20 least significant bits are used for the flow | |
2508 | * label. This setting has precedence over any IPv6-layer | |
2509 | * setting. | |
2510 | * | |
2511 | * spp_dscp - This field is used in conjunction with the SPP_DSCP flag | |
2512 | * and contains the DSCP. The 6 most significant bits are | |
2513 | * used for the DSCP. This setting has precedence over any | |
2514 | * IPv4- or IPv6- layer setting. | |
1da177e4 | 2515 | */ |
16164366 AB |
2516 | static int sctp_apply_peer_addr_params(struct sctp_paddrparams *params, |
2517 | struct sctp_transport *trans, | |
2518 | struct sctp_association *asoc, | |
2519 | struct sctp_sock *sp, | |
2520 | int hb_change, | |
2521 | int pmtud_change, | |
2522 | int sackdelay_change) | |
52ccb8e9 FF |
2523 | { |
2524 | int error; | |
2525 | ||
2526 | if (params->spp_flags & SPP_HB_DEMAND && trans) { | |
55e26eb9 EB |
2527 | struct net *net = sock_net(trans->asoc->base.sk); |
2528 | ||
2529 | error = sctp_primitive_REQUESTHEARTBEAT(net, trans->asoc, trans); | |
52ccb8e9 FF |
2530 | if (error) |
2531 | return error; | |
2532 | } | |
2533 | ||
bdf3092a VY |
2534 | /* Note that unless the spp_flag is set to SPP_HB_ENABLE the value of |
2535 | * this field is ignored. Note also that a value of zero indicates | |
2536 | * the current setting should be left unchanged. | |
2537 | */ | |
2538 | if (params->spp_flags & SPP_HB_ENABLE) { | |
2539 | ||
2540 | /* Re-zero the interval if the SPP_HB_TIME_IS_ZERO is | |
2541 | * set. This lets us use 0 value when this flag | |
2542 | * is set. | |
2543 | */ | |
2544 | if (params->spp_flags & SPP_HB_TIME_IS_ZERO) | |
2545 | params->spp_hbinterval = 0; | |
2546 | ||
2547 | if (params->spp_hbinterval || | |
2548 | (params->spp_flags & SPP_HB_TIME_IS_ZERO)) { | |
2549 | if (trans) { | |
2550 | trans->hbinterval = | |
2551 | msecs_to_jiffies(params->spp_hbinterval); | |
2552 | } else if (asoc) { | |
2553 | asoc->hbinterval = | |
2554 | msecs_to_jiffies(params->spp_hbinterval); | |
2555 | } else { | |
2556 | sp->hbinterval = params->spp_hbinterval; | |
2557 | } | |
52ccb8e9 FF |
2558 | } |
2559 | } | |
2560 | ||
2561 | if (hb_change) { | |
2562 | if (trans) { | |
2563 | trans->param_flags = | |
2564 | (trans->param_flags & ~SPP_HB) | hb_change; | |
2565 | } else if (asoc) { | |
2566 | asoc->param_flags = | |
2567 | (asoc->param_flags & ~SPP_HB) | hb_change; | |
2568 | } else { | |
2569 | sp->param_flags = | |
2570 | (sp->param_flags & ~SPP_HB) | hb_change; | |
2571 | } | |
2572 | } | |
2573 | ||
bdf3092a VY |
2574 | /* When Path MTU discovery is disabled the value specified here will |
2575 | * be the "fixed" path mtu (i.e. the value of the spp_flags field must | |
2576 | * include the flag SPP_PMTUD_DISABLE for this field to have any | |
2577 | * effect). | |
2578 | */ | |
2579 | if ((params->spp_flags & SPP_PMTUD_DISABLE) && params->spp_pathmtu) { | |
52ccb8e9 FF |
2580 | if (trans) { |
2581 | trans->pathmtu = params->spp_pathmtu; | |
3ebfdf08 | 2582 | sctp_assoc_sync_pmtu(asoc); |
52ccb8e9 | 2583 | } else if (asoc) { |
c4b2893d | 2584 | sctp_assoc_set_pmtu(asoc, params->spp_pathmtu); |
52ccb8e9 FF |
2585 | } else { |
2586 | sp->pathmtu = params->spp_pathmtu; | |
2587 | } | |
2588 | } | |
2589 | ||
2590 | if (pmtud_change) { | |
2591 | if (trans) { | |
2592 | int update = (trans->param_flags & SPP_PMTUD_DISABLE) && | |
2593 | (params->spp_flags & SPP_PMTUD_ENABLE); | |
2594 | trans->param_flags = | |
2595 | (trans->param_flags & ~SPP_PMTUD) | pmtud_change; | |
2596 | if (update) { | |
9914ae3c | 2597 | sctp_transport_pmtu(trans, sctp_opt2sk(sp)); |
3ebfdf08 | 2598 | sctp_assoc_sync_pmtu(asoc); |
52ccb8e9 FF |
2599 | } |
2600 | } else if (asoc) { | |
2601 | asoc->param_flags = | |
2602 | (asoc->param_flags & ~SPP_PMTUD) | pmtud_change; | |
2603 | } else { | |
2604 | sp->param_flags = | |
2605 | (sp->param_flags & ~SPP_PMTUD) | pmtud_change; | |
2606 | } | |
2607 | } | |
2608 | ||
bdf3092a VY |
2609 | /* Note that unless the spp_flag is set to SPP_SACKDELAY_ENABLE the |
2610 | * value of this field is ignored. Note also that a value of zero | |
2611 | * indicates the current setting should be left unchanged. | |
2612 | */ | |
2613 | if ((params->spp_flags & SPP_SACKDELAY_ENABLE) && params->spp_sackdelay) { | |
52ccb8e9 FF |
2614 | if (trans) { |
2615 | trans->sackdelay = | |
2616 | msecs_to_jiffies(params->spp_sackdelay); | |
2617 | } else if (asoc) { | |
2618 | asoc->sackdelay = | |
2619 | msecs_to_jiffies(params->spp_sackdelay); | |
2620 | } else { | |
2621 | sp->sackdelay = params->spp_sackdelay; | |
2622 | } | |
2623 | } | |
2624 | ||
2625 | if (sackdelay_change) { | |
2626 | if (trans) { | |
2627 | trans->param_flags = | |
2628 | (trans->param_flags & ~SPP_SACKDELAY) | | |
2629 | sackdelay_change; | |
2630 | } else if (asoc) { | |
2631 | asoc->param_flags = | |
2632 | (asoc->param_flags & ~SPP_SACKDELAY) | | |
2633 | sackdelay_change; | |
2634 | } else { | |
2635 | sp->param_flags = | |
2636 | (sp->param_flags & ~SPP_SACKDELAY) | | |
2637 | sackdelay_change; | |
2638 | } | |
2639 | } | |
2640 | ||
37051f73 APO |
2641 | /* Note that a value of zero indicates the current setting should be |
2642 | left unchanged. | |
bdf3092a | 2643 | */ |
37051f73 | 2644 | if (params->spp_pathmaxrxt) { |
52ccb8e9 FF |
2645 | if (trans) { |
2646 | trans->pathmaxrxt = params->spp_pathmaxrxt; | |
2647 | } else if (asoc) { | |
2648 | asoc->pathmaxrxt = params->spp_pathmaxrxt; | |
2649 | } else { | |
2650 | sp->pathmaxrxt = params->spp_pathmaxrxt; | |
2651 | } | |
2652 | } | |
2653 | ||
0b0dce7a | 2654 | if (params->spp_flags & SPP_IPV6_FLOWLABEL) { |
741880e1 XL |
2655 | if (trans) { |
2656 | if (trans->ipaddr.sa.sa_family == AF_INET6) { | |
2657 | trans->flowlabel = params->spp_ipv6_flowlabel & | |
2658 | SCTP_FLOWLABEL_VAL_MASK; | |
2659 | trans->flowlabel |= SCTP_FLOWLABEL_SET_MASK; | |
2660 | } | |
0b0dce7a | 2661 | } else if (asoc) { |
af8a2b8b XL |
2662 | struct sctp_transport *t; |
2663 | ||
2664 | list_for_each_entry(t, &asoc->peer.transport_addr_list, | |
0b0dce7a | 2665 | transports) { |
af8a2b8b | 2666 | if (t->ipaddr.sa.sa_family != AF_INET6) |
0b0dce7a | 2667 | continue; |
af8a2b8b XL |
2668 | t->flowlabel = params->spp_ipv6_flowlabel & |
2669 | SCTP_FLOWLABEL_VAL_MASK; | |
2670 | t->flowlabel |= SCTP_FLOWLABEL_SET_MASK; | |
0b0dce7a XL |
2671 | } |
2672 | asoc->flowlabel = params->spp_ipv6_flowlabel & | |
2673 | SCTP_FLOWLABEL_VAL_MASK; | |
2674 | asoc->flowlabel |= SCTP_FLOWLABEL_SET_MASK; | |
2675 | } else if (sctp_opt2sk(sp)->sk_family == AF_INET6) { | |
2676 | sp->flowlabel = params->spp_ipv6_flowlabel & | |
2677 | SCTP_FLOWLABEL_VAL_MASK; | |
2678 | sp->flowlabel |= SCTP_FLOWLABEL_SET_MASK; | |
2679 | } | |
2680 | } | |
2681 | ||
2682 | if (params->spp_flags & SPP_DSCP) { | |
2683 | if (trans) { | |
2684 | trans->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK; | |
2685 | trans->dscp |= SCTP_DSCP_SET_MASK; | |
2686 | } else if (asoc) { | |
af8a2b8b XL |
2687 | struct sctp_transport *t; |
2688 | ||
2689 | list_for_each_entry(t, &asoc->peer.transport_addr_list, | |
0b0dce7a | 2690 | transports) { |
af8a2b8b XL |
2691 | t->dscp = params->spp_dscp & |
2692 | SCTP_DSCP_VAL_MASK; | |
2693 | t->dscp |= SCTP_DSCP_SET_MASK; | |
0b0dce7a XL |
2694 | } |
2695 | asoc->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK; | |
2696 | asoc->dscp |= SCTP_DSCP_SET_MASK; | |
2697 | } else { | |
2698 | sp->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK; | |
2699 | sp->dscp |= SCTP_DSCP_SET_MASK; | |
2700 | } | |
2701 | } | |
2702 | ||
52ccb8e9 FF |
2703 | return 0; |
2704 | } | |
2705 | ||
1da177e4 | 2706 | static int sctp_setsockopt_peer_addr_params(struct sock *sk, |
b7058842 DM |
2707 | char __user *optval, |
2708 | unsigned int optlen) | |
1da177e4 | 2709 | { |
52ccb8e9 FF |
2710 | struct sctp_paddrparams params; |
2711 | struct sctp_transport *trans = NULL; | |
2712 | struct sctp_association *asoc = NULL; | |
2713 | struct sctp_sock *sp = sctp_sk(sk); | |
1da177e4 | 2714 | int error; |
52ccb8e9 | 2715 | int hb_change, pmtud_change, sackdelay_change; |
1da177e4 | 2716 | |
0b0dce7a XL |
2717 | if (optlen == sizeof(params)) { |
2718 | if (copy_from_user(¶ms, optval, optlen)) | |
2719 | return -EFAULT; | |
2720 | } else if (optlen == ALIGN(offsetof(struct sctp_paddrparams, | |
2721 | spp_ipv6_flowlabel), 4)) { | |
2722 | if (copy_from_user(¶ms, optval, optlen)) | |
2723 | return -EFAULT; | |
2724 | if (params.spp_flags & (SPP_DSCP | SPP_IPV6_FLOWLABEL)) | |
2725 | return -EINVAL; | |
2726 | } else { | |
cb3f837b | 2727 | return -EINVAL; |
0b0dce7a | 2728 | } |
1da177e4 | 2729 | |
52ccb8e9 FF |
2730 | /* Validate flags and value parameters. */ |
2731 | hb_change = params.spp_flags & SPP_HB; | |
2732 | pmtud_change = params.spp_flags & SPP_PMTUD; | |
2733 | sackdelay_change = params.spp_flags & SPP_SACKDELAY; | |
2734 | ||
2735 | if (hb_change == SPP_HB || | |
2736 | pmtud_change == SPP_PMTUD || | |
2737 | sackdelay_change == SPP_SACKDELAY || | |
2738 | params.spp_sackdelay > 500 || | |
f64f9e71 JP |
2739 | (params.spp_pathmtu && |
2740 | params.spp_pathmtu < SCTP_DEFAULT_MINSEGMENT)) | |
52ccb8e9 | 2741 | return -EINVAL; |
1da177e4 | 2742 | |
52ccb8e9 FF |
2743 | /* If an address other than INADDR_ANY is specified, and |
2744 | * no transport is found, then the request is invalid. | |
2745 | */ | |
cb3f837b | 2746 | if (!sctp_is_any(sk, (union sctp_addr *)¶ms.spp_address)) { |
52ccb8e9 FF |
2747 | trans = sctp_addr_id2transport(sk, ¶ms.spp_address, |
2748 | params.spp_assoc_id); | |
2749 | if (!trans) | |
1da177e4 | 2750 | return -EINVAL; |
1da177e4 LT |
2751 | } |
2752 | ||
52ccb8e9 FF |
2753 | /* Get association, if assoc_id != 0 and the socket is a one |
2754 | * to many style socket, and an association was not found, then | |
2755 | * the id was invalid. | |
2756 | */ | |
2757 | asoc = sctp_id2assoc(sk, params.spp_assoc_id); | |
2758 | if (!asoc && params.spp_assoc_id && sctp_style(sk, UDP)) | |
1da177e4 LT |
2759 | return -EINVAL; |
2760 | ||
52ccb8e9 FF |
2761 | /* Heartbeat demand can only be sent on a transport or |
2762 | * association, but not a socket. | |
1da177e4 | 2763 | */ |
52ccb8e9 FF |
2764 | if (params.spp_flags & SPP_HB_DEMAND && !trans && !asoc) |
2765 | return -EINVAL; | |
2766 | ||
2767 | /* Process parameters. */ | |
2768 | error = sctp_apply_peer_addr_params(¶ms, trans, asoc, sp, | |
2769 | hb_change, pmtud_change, | |
2770 | sackdelay_change); | |
1da177e4 | 2771 | |
52ccb8e9 FF |
2772 | if (error) |
2773 | return error; | |
2774 | ||
2775 | /* If changes are for association, also apply parameters to each | |
2776 | * transport. | |
1da177e4 | 2777 | */ |
52ccb8e9 | 2778 | if (!trans && asoc) { |
9dbc15f0 RD |
2779 | list_for_each_entry(trans, &asoc->peer.transport_addr_list, |
2780 | transports) { | |
52ccb8e9 FF |
2781 | sctp_apply_peer_addr_params(¶ms, trans, asoc, sp, |
2782 | hb_change, pmtud_change, | |
2783 | sackdelay_change); | |
2784 | } | |
2785 | } | |
1da177e4 LT |
2786 | |
2787 | return 0; | |
2788 | } | |
2789 | ||
0ea5e4df | 2790 | static inline __u32 sctp_spp_sackdelay_enable(__u32 param_flags) |
2791 | { | |
2792 | return (param_flags & ~SPP_SACKDELAY) | SPP_SACKDELAY_ENABLE; | |
2793 | } | |
2794 | ||
2795 | static inline __u32 sctp_spp_sackdelay_disable(__u32 param_flags) | |
2796 | { | |
2797 | return (param_flags & ~SPP_SACKDELAY) | SPP_SACKDELAY_DISABLE; | |
2798 | } | |
2799 | ||
d364d927 WY |
2800 | /* |
2801 | * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK) | |
2802 | * | |
2803 | * This option will effect the way delayed acks are performed. This | |
2804 | * option allows you to get or set the delayed ack time, in | |
2805 | * milliseconds. It also allows changing the delayed ack frequency. | |
2806 | * Changing the frequency to 1 disables the delayed sack algorithm. If | |
2807 | * the assoc_id is 0, then this sets or gets the endpoints default | |
2808 | * values. If the assoc_id field is non-zero, then the set or get | |
2809 | * effects the specified association for the one to many model (the | |
2810 | * assoc_id field is ignored by the one to one model). Note that if | |
2811 | * sack_delay or sack_freq are 0 when setting this option, then the | |
2812 | * current values will remain unchanged. | |
2813 | * | |
2814 | * struct sctp_sack_info { | |
2815 | * sctp_assoc_t sack_assoc_id; | |
2816 | * uint32_t sack_delay; | |
2817 | * uint32_t sack_freq; | |
2818 | * }; | |
2819 | * | |
2820 | * sack_assoc_id - This parameter, indicates which association the user | |
2821 | * is performing an action upon. Note that if this field's value is | |
2822 | * zero then the endpoints default value is changed (effecting future | |
2823 | * associations only). | |
2824 | * | |
2825 | * sack_delay - This parameter contains the number of milliseconds that | |
2826 | * the user is requesting the delayed ACK timer be set to. Note that | |
2827 | * this value is defined in the standard to be between 200 and 500 | |
2828 | * milliseconds. | |
2829 | * | |
2830 | * sack_freq - This parameter contains the number of packets that must | |
2831 | * be received before a sack is sent without waiting for the delay | |
2832 | * timer to expire. The default value for this is 2, setting this | |
2833 | * value to 1 will disable the delayed sack algorithm. | |
7708610b FF |
2834 | */ |
2835 | ||
d364d927 | 2836 | static int sctp_setsockopt_delayed_ack(struct sock *sk, |
b7058842 | 2837 | char __user *optval, unsigned int optlen) |
7708610b | 2838 | { |
d364d927 | 2839 | struct sctp_sack_info params; |
7708610b FF |
2840 | struct sctp_transport *trans = NULL; |
2841 | struct sctp_association *asoc = NULL; | |
2842 | struct sctp_sock *sp = sctp_sk(sk); | |
2843 | ||
d364d927 WY |
2844 | if (optlen == sizeof(struct sctp_sack_info)) { |
2845 | if (copy_from_user(¶ms, optval, optlen)) | |
2846 | return -EFAULT; | |
7708610b | 2847 | |
d364d927 WY |
2848 | if (params.sack_delay == 0 && params.sack_freq == 0) |
2849 | return 0; | |
2850 | } else if (optlen == sizeof(struct sctp_assoc_value)) { | |
94f65193 | 2851 | pr_warn_ratelimited(DEPRECATED |
f916ec96 | 2852 | "%s (pid %d) " |
94f65193 | 2853 | "Use of struct sctp_assoc_value in delayed_ack socket option.\n" |
f916ec96 NH |
2854 | "Use struct sctp_sack_info instead\n", |
2855 | current->comm, task_pid_nr(current)); | |
d364d927 WY |
2856 | if (copy_from_user(¶ms, optval, optlen)) |
2857 | return -EFAULT; | |
2858 | ||
2859 | if (params.sack_delay == 0) | |
2860 | params.sack_freq = 1; | |
2861 | else | |
2862 | params.sack_freq = 0; | |
2863 | } else | |
cb3f837b | 2864 | return -EINVAL; |
7708610b FF |
2865 | |
2866 | /* Validate value parameter. */ | |
d364d927 | 2867 | if (params.sack_delay > 500) |
7708610b FF |
2868 | return -EINVAL; |
2869 | ||
d364d927 | 2870 | /* Get association, if sack_assoc_id != 0 and the socket is a one |
7708610b FF |
2871 | * to many style socket, and an association was not found, then |
2872 | * the id was invalid. | |
d808ad9a | 2873 | */ |
d364d927 WY |
2874 | asoc = sctp_id2assoc(sk, params.sack_assoc_id); |
2875 | if (!asoc && params.sack_assoc_id && sctp_style(sk, UDP)) | |
7708610b FF |
2876 | return -EINVAL; |
2877 | ||
d364d927 | 2878 | if (params.sack_delay) { |
7708610b FF |
2879 | if (asoc) { |
2880 | asoc->sackdelay = | |
d364d927 | 2881 | msecs_to_jiffies(params.sack_delay); |
d808ad9a | 2882 | asoc->param_flags = |
0ea5e4df | 2883 | sctp_spp_sackdelay_enable(asoc->param_flags); |
7708610b | 2884 | } else { |
d364d927 | 2885 | sp->sackdelay = params.sack_delay; |
d808ad9a | 2886 | sp->param_flags = |
0ea5e4df | 2887 | sctp_spp_sackdelay_enable(sp->param_flags); |
7708610b | 2888 | } |
d364d927 WY |
2889 | } |
2890 | ||
2891 | if (params.sack_freq == 1) { | |
7708610b | 2892 | if (asoc) { |
d808ad9a | 2893 | asoc->param_flags = |
0ea5e4df | 2894 | sctp_spp_sackdelay_disable(asoc->param_flags); |
7708610b | 2895 | } else { |
d808ad9a | 2896 | sp->param_flags = |
0ea5e4df | 2897 | sctp_spp_sackdelay_disable(sp->param_flags); |
7708610b | 2898 | } |
d364d927 WY |
2899 | } else if (params.sack_freq > 1) { |
2900 | if (asoc) { | |
2901 | asoc->sackfreq = params.sack_freq; | |
2902 | asoc->param_flags = | |
0ea5e4df | 2903 | sctp_spp_sackdelay_enable(asoc->param_flags); |
d364d927 WY |
2904 | } else { |
2905 | sp->sackfreq = params.sack_freq; | |
2906 | sp->param_flags = | |
0ea5e4df | 2907 | sctp_spp_sackdelay_enable(sp->param_flags); |
d364d927 | 2908 | } |
7708610b FF |
2909 | } |
2910 | ||
2911 | /* If change is for association, also apply to each transport. */ | |
2912 | if (asoc) { | |
9dbc15f0 RD |
2913 | list_for_each_entry(trans, &asoc->peer.transport_addr_list, |
2914 | transports) { | |
d364d927 | 2915 | if (params.sack_delay) { |
7708610b | 2916 | trans->sackdelay = |
d364d927 | 2917 | msecs_to_jiffies(params.sack_delay); |
d808ad9a | 2918 | trans->param_flags = |
0ea5e4df | 2919 | sctp_spp_sackdelay_enable(trans->param_flags); |
d364d927 | 2920 | } |
7bfe8bdb | 2921 | if (params.sack_freq == 1) { |
d808ad9a | 2922 | trans->param_flags = |
0ea5e4df | 2923 | sctp_spp_sackdelay_disable(trans->param_flags); |
d364d927 WY |
2924 | } else if (params.sack_freq > 1) { |
2925 | trans->sackfreq = params.sack_freq; | |
2926 | trans->param_flags = | |
0ea5e4df | 2927 | sctp_spp_sackdelay_enable(trans->param_flags); |
7708610b FF |
2928 | } |
2929 | } | |
2930 | } | |
d808ad9a | 2931 | |
7708610b FF |
2932 | return 0; |
2933 | } | |
2934 | ||
1da177e4 LT |
2935 | /* 7.1.3 Initialization Parameters (SCTP_INITMSG) |
2936 | * | |
2937 | * Applications can specify protocol parameters for the default association | |
2938 | * initialization. The option name argument to setsockopt() and getsockopt() | |
2939 | * is SCTP_INITMSG. | |
2940 | * | |
2941 | * Setting initialization parameters is effective only on an unconnected | |
2942 | * socket (for UDP-style sockets only future associations are effected | |
2943 | * by the change). With TCP-style sockets, this option is inherited by | |
2944 | * sockets derived from a listener socket. | |
2945 | */ | |
b7058842 | 2946 | static int sctp_setsockopt_initmsg(struct sock *sk, char __user *optval, unsigned int optlen) |
1da177e4 LT |
2947 | { |
2948 | struct sctp_initmsg sinit; | |
2949 | struct sctp_sock *sp = sctp_sk(sk); | |
2950 | ||
2951 | if (optlen != sizeof(struct sctp_initmsg)) | |
2952 | return -EINVAL; | |
2953 | if (copy_from_user(&sinit, optval, optlen)) | |
2954 | return -EFAULT; | |
2955 | ||
2956 | if (sinit.sinit_num_ostreams) | |
d808ad9a | 2957 | sp->initmsg.sinit_num_ostreams = sinit.sinit_num_ostreams; |
1da177e4 | 2958 | if (sinit.sinit_max_instreams) |
d808ad9a | 2959 | sp->initmsg.sinit_max_instreams = sinit.sinit_max_instreams; |
1da177e4 | 2960 | if (sinit.sinit_max_attempts) |
d808ad9a | 2961 | sp->initmsg.sinit_max_attempts = sinit.sinit_max_attempts; |
1da177e4 | 2962 | if (sinit.sinit_max_init_timeo) |
d808ad9a | 2963 | sp->initmsg.sinit_max_init_timeo = sinit.sinit_max_init_timeo; |
1da177e4 LT |
2964 | |
2965 | return 0; | |
2966 | } | |
2967 | ||
2968 | /* | |
2969 | * 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM) | |
2970 | * | |
2971 | * Applications that wish to use the sendto() system call may wish to | |
2972 | * specify a default set of parameters that would normally be supplied | |
2973 | * through the inclusion of ancillary data. This socket option allows | |
2974 | * such an application to set the default sctp_sndrcvinfo structure. | |
2975 | * The application that wishes to use this socket option simply passes | |
2976 | * in to this call the sctp_sndrcvinfo structure defined in Section | |
2977 | * 5.2.2) The input parameters accepted by this call include | |
2978 | * sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context, | |
2979 | * sinfo_timetolive. The user must provide the sinfo_assoc_id field in | |
2980 | * to this call if the caller is using the UDP model. | |
2981 | */ | |
2982 | static int sctp_setsockopt_default_send_param(struct sock *sk, | |
b7058842 DM |
2983 | char __user *optval, |
2984 | unsigned int optlen) | |
1da177e4 | 2985 | { |
1da177e4 | 2986 | struct sctp_sock *sp = sctp_sk(sk); |
6b3fd5f3 GOV |
2987 | struct sctp_association *asoc; |
2988 | struct sctp_sndrcvinfo info; | |
1da177e4 | 2989 | |
6b3fd5f3 | 2990 | if (optlen != sizeof(info)) |
1da177e4 LT |
2991 | return -EINVAL; |
2992 | if (copy_from_user(&info, optval, optlen)) | |
2993 | return -EFAULT; | |
6b3fd5f3 GOV |
2994 | if (info.sinfo_flags & |
2995 | ~(SCTP_UNORDERED | SCTP_ADDR_OVER | | |
2996 | SCTP_ABORT | SCTP_EOF)) | |
2997 | return -EINVAL; | |
1da177e4 LT |
2998 | |
2999 | asoc = sctp_id2assoc(sk, info.sinfo_assoc_id); | |
3000 | if (!asoc && info.sinfo_assoc_id && sctp_style(sk, UDP)) | |
3001 | return -EINVAL; | |
1da177e4 LT |
3002 | if (asoc) { |
3003 | asoc->default_stream = info.sinfo_stream; | |
3004 | asoc->default_flags = info.sinfo_flags; | |
3005 | asoc->default_ppid = info.sinfo_ppid; | |
3006 | asoc->default_context = info.sinfo_context; | |
3007 | asoc->default_timetolive = info.sinfo_timetolive; | |
3008 | } else { | |
3009 | sp->default_stream = info.sinfo_stream; | |
3010 | sp->default_flags = info.sinfo_flags; | |
3011 | sp->default_ppid = info.sinfo_ppid; | |
3012 | sp->default_context = info.sinfo_context; | |
3013 | sp->default_timetolive = info.sinfo_timetolive; | |
3014 | } | |
3015 | ||
3016 | return 0; | |
3017 | } | |
3018 | ||
6b3fd5f3 GOV |
3019 | /* RFC6458, Section 8.1.31. Set/get Default Send Parameters |
3020 | * (SCTP_DEFAULT_SNDINFO) | |
3021 | */ | |
3022 | static int sctp_setsockopt_default_sndinfo(struct sock *sk, | |
3023 | char __user *optval, | |
3024 | unsigned int optlen) | |
3025 | { | |
3026 | struct sctp_sock *sp = sctp_sk(sk); | |
3027 | struct sctp_association *asoc; | |
3028 | struct sctp_sndinfo info; | |
3029 | ||
3030 | if (optlen != sizeof(info)) | |
3031 | return -EINVAL; | |
3032 | if (copy_from_user(&info, optval, optlen)) | |
3033 | return -EFAULT; | |
3034 | if (info.snd_flags & | |
3035 | ~(SCTP_UNORDERED | SCTP_ADDR_OVER | | |
3036 | SCTP_ABORT | SCTP_EOF)) | |
3037 | return -EINVAL; | |
3038 | ||
3039 | asoc = sctp_id2assoc(sk, info.snd_assoc_id); | |
3040 | if (!asoc && info.snd_assoc_id && sctp_style(sk, UDP)) | |
3041 | return -EINVAL; | |
3042 | if (asoc) { | |
3043 | asoc->default_stream = info.snd_sid; | |
3044 | asoc->default_flags = info.snd_flags; | |
3045 | asoc->default_ppid = info.snd_ppid; | |
3046 | asoc->default_context = info.snd_context; | |
3047 | } else { | |
3048 | sp->default_stream = info.snd_sid; | |
3049 | sp->default_flags = info.snd_flags; | |
3050 | sp->default_ppid = info.snd_ppid; | |
3051 | sp->default_context = info.snd_context; | |
3052 | } | |
3053 | ||
3054 | return 0; | |
3055 | } | |
3056 | ||
1da177e4 LT |
3057 | /* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR) |
3058 | * | |
3059 | * Requests that the local SCTP stack use the enclosed peer address as | |
3060 | * the association primary. The enclosed address must be one of the | |
3061 | * association peer's addresses. | |
3062 | */ | |
3063 | static int sctp_setsockopt_primary_addr(struct sock *sk, char __user *optval, | |
b7058842 | 3064 | unsigned int optlen) |
1da177e4 LT |
3065 | { |
3066 | struct sctp_prim prim; | |
3067 | struct sctp_transport *trans; | |
2277c7cd RH |
3068 | struct sctp_af *af; |
3069 | int err; | |
1da177e4 LT |
3070 | |
3071 | if (optlen != sizeof(struct sctp_prim)) | |
3072 | return -EINVAL; | |
3073 | ||
3074 | if (copy_from_user(&prim, optval, sizeof(struct sctp_prim))) | |
3075 | return -EFAULT; | |
3076 | ||
2277c7cd RH |
3077 | /* Allow security module to validate address but need address len. */ |
3078 | af = sctp_get_af_specific(prim.ssp_addr.ss_family); | |
3079 | if (!af) | |
3080 | return -EINVAL; | |
3081 | ||
3082 | err = security_sctp_bind_connect(sk, SCTP_PRIMARY_ADDR, | |
3083 | (struct sockaddr *)&prim.ssp_addr, | |
3084 | af->sockaddr_len); | |
3085 | if (err) | |
3086 | return err; | |
3087 | ||
1da177e4 LT |
3088 | trans = sctp_addr_id2transport(sk, &prim.ssp_addr, prim.ssp_assoc_id); |
3089 | if (!trans) | |
3090 | return -EINVAL; | |
3091 | ||
3092 | sctp_assoc_set_primary(trans->asoc, trans); | |
3093 | ||
3094 | return 0; | |
3095 | } | |
3096 | ||
3097 | /* | |
3098 | * 7.1.5 SCTP_NODELAY | |
3099 | * | |
3100 | * Turn on/off any Nagle-like algorithm. This means that packets are | |
3101 | * generally sent as soon as possible and no unnecessary delays are | |
3102 | * introduced, at the cost of more packets in the network. Expects an | |
3103 | * integer boolean flag. | |
3104 | */ | |
3105 | static int sctp_setsockopt_nodelay(struct sock *sk, char __user *optval, | |
b7058842 | 3106 | unsigned int optlen) |
1da177e4 LT |
3107 | { |
3108 | int val; | |
3109 | ||
3110 | if (optlen < sizeof(int)) | |
3111 | return -EINVAL; | |
3112 | if (get_user(val, (int __user *)optval)) | |
3113 | return -EFAULT; | |
3114 | ||
3115 | sctp_sk(sk)->nodelay = (val == 0) ? 0 : 1; | |
3116 | return 0; | |
3117 | } | |
3118 | ||
3119 | /* | |
3120 | * | |
3121 | * 7.1.1 SCTP_RTOINFO | |
3122 | * | |
3123 | * The protocol parameters used to initialize and bound retransmission | |
3124 | * timeout (RTO) are tunable. sctp_rtoinfo structure is used to access | |
3125 | * and modify these parameters. | |
3126 | * All parameters are time values, in milliseconds. A value of 0, when | |
3127 | * modifying the parameters, indicates that the current value should not | |
3128 | * be changed. | |
3129 | * | |
3130 | */ | |
b7058842 DM |
3131 | static int sctp_setsockopt_rtoinfo(struct sock *sk, char __user *optval, unsigned int optlen) |
3132 | { | |
1da177e4 LT |
3133 | struct sctp_rtoinfo rtoinfo; |
3134 | struct sctp_association *asoc; | |
85f935d4 | 3135 | unsigned long rto_min, rto_max; |
3136 | struct sctp_sock *sp = sctp_sk(sk); | |
1da177e4 LT |
3137 | |
3138 | if (optlen != sizeof (struct sctp_rtoinfo)) | |
3139 | return -EINVAL; | |
3140 | ||
3141 | if (copy_from_user(&rtoinfo, optval, optlen)) | |
3142 | return -EFAULT; | |
3143 | ||
3144 | asoc = sctp_id2assoc(sk, rtoinfo.srto_assoc_id); | |
3145 | ||
3146 | /* Set the values to the specific association */ | |
3147 | if (!asoc && rtoinfo.srto_assoc_id && sctp_style(sk, UDP)) | |
3148 | return -EINVAL; | |
3149 | ||
85f935d4 | 3150 | rto_max = rtoinfo.srto_max; |
3151 | rto_min = rtoinfo.srto_min; | |
3152 | ||
3153 | if (rto_max) | |
3154 | rto_max = asoc ? msecs_to_jiffies(rto_max) : rto_max; | |
3155 | else | |
3156 | rto_max = asoc ? asoc->rto_max : sp->rtoinfo.srto_max; | |
3157 | ||
3158 | if (rto_min) | |
3159 | rto_min = asoc ? msecs_to_jiffies(rto_min) : rto_min; | |
3160 | else | |
3161 | rto_min = asoc ? asoc->rto_min : sp->rtoinfo.srto_min; | |
3162 | ||
3163 | if (rto_min > rto_max) | |
3164 | return -EINVAL; | |
3165 | ||
1da177e4 LT |
3166 | if (asoc) { |
3167 | if (rtoinfo.srto_initial != 0) | |
d808ad9a | 3168 | asoc->rto_initial = |
1da177e4 | 3169 | msecs_to_jiffies(rtoinfo.srto_initial); |
85f935d4 | 3170 | asoc->rto_max = rto_max; |
3171 | asoc->rto_min = rto_min; | |
1da177e4 LT |
3172 | } else { |
3173 | /* If there is no association or the association-id = 0 | |
3174 | * set the values to the endpoint. | |
3175 | */ | |
1da177e4 LT |
3176 | if (rtoinfo.srto_initial != 0) |
3177 | sp->rtoinfo.srto_initial = rtoinfo.srto_initial; | |
85f935d4 | 3178 | sp->rtoinfo.srto_max = rto_max; |
3179 | sp->rtoinfo.srto_min = rto_min; | |
1da177e4 LT |
3180 | } |
3181 | ||
3182 | return 0; | |
3183 | } | |
3184 | ||
3185 | /* | |
3186 | * | |
3187 | * 7.1.2 SCTP_ASSOCINFO | |
3188 | * | |
59c51591 | 3189 | * This option is used to tune the maximum retransmission attempts |
1da177e4 LT |
3190 | * of the association. |
3191 | * Returns an error if the new association retransmission value is | |
3192 | * greater than the sum of the retransmission value of the peer. | |
3193 | * See [SCTP] for more information. | |
3194 | * | |
3195 | */ | |
b7058842 | 3196 | static int sctp_setsockopt_associnfo(struct sock *sk, char __user *optval, unsigned int optlen) |
1da177e4 LT |
3197 | { |
3198 | ||
3199 | struct sctp_assocparams assocparams; | |
3200 | struct sctp_association *asoc; | |
3201 | ||
3202 | if (optlen != sizeof(struct sctp_assocparams)) | |
3203 | return -EINVAL; | |
3204 | if (copy_from_user(&assocparams, optval, optlen)) | |
3205 | return -EFAULT; | |
3206 | ||
3207 | asoc = sctp_id2assoc(sk, assocparams.sasoc_assoc_id); | |
3208 | ||
3209 | if (!asoc && assocparams.sasoc_assoc_id && sctp_style(sk, UDP)) | |
3210 | return -EINVAL; | |
3211 | ||
3212 | /* Set the values to the specific association */ | |
3213 | if (asoc) { | |
402d68c4 VY |
3214 | if (assocparams.sasoc_asocmaxrxt != 0) { |
3215 | __u32 path_sum = 0; | |
3216 | int paths = 0; | |
402d68c4 VY |
3217 | struct sctp_transport *peer_addr; |
3218 | ||
9dbc15f0 RD |
3219 | list_for_each_entry(peer_addr, &asoc->peer.transport_addr_list, |
3220 | transports) { | |
402d68c4 VY |
3221 | path_sum += peer_addr->pathmaxrxt; |
3222 | paths++; | |
3223 | } | |
3224 | ||
025dfdaf | 3225 | /* Only validate asocmaxrxt if we have more than |
402d68c4 VY |
3226 | * one path/transport. We do this because path |
3227 | * retransmissions are only counted when we have more | |
3228 | * then one path. | |
3229 | */ | |
3230 | if (paths > 1 && | |
3231 | assocparams.sasoc_asocmaxrxt > path_sum) | |
3232 | return -EINVAL; | |
3233 | ||
1da177e4 | 3234 | asoc->max_retrans = assocparams.sasoc_asocmaxrxt; |
402d68c4 VY |
3235 | } |
3236 | ||
52db882f DB |
3237 | if (assocparams.sasoc_cookie_life != 0) |
3238 | asoc->cookie_life = ms_to_ktime(assocparams.sasoc_cookie_life); | |
1da177e4 LT |
3239 | } else { |
3240 | /* Set the values to the endpoint */ | |
3241 | struct sctp_sock *sp = sctp_sk(sk); | |
3242 | ||
3243 | if (assocparams.sasoc_asocmaxrxt != 0) | |
3244 | sp->assocparams.sasoc_asocmaxrxt = | |
3245 | assocparams.sasoc_asocmaxrxt; | |
3246 | if (assocparams.sasoc_cookie_life != 0) | |
3247 | sp->assocparams.sasoc_cookie_life = | |
3248 | assocparams.sasoc_cookie_life; | |
3249 | } | |
3250 | return 0; | |
3251 | } | |
3252 | ||
3253 | /* | |
3254 | * 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR) | |
3255 | * | |
3256 | * This socket option is a boolean flag which turns on or off mapped V4 | |
3257 | * addresses. If this option is turned on and the socket is type | |
3258 | * PF_INET6, then IPv4 addresses will be mapped to V6 representation. | |
3259 | * If this option is turned off, then no mapping will be done of V4 | |
3260 | * addresses and a user will receive both PF_INET6 and PF_INET type | |
3261 | * addresses on the socket. | |
3262 | */ | |
b7058842 | 3263 | static int sctp_setsockopt_mappedv4(struct sock *sk, char __user *optval, unsigned int optlen) |
1da177e4 LT |
3264 | { |
3265 | int val; | |
3266 | struct sctp_sock *sp = sctp_sk(sk); | |
3267 | ||
3268 | if (optlen < sizeof(int)) | |
3269 | return -EINVAL; | |
3270 | if (get_user(val, (int __user *)optval)) | |
3271 | return -EFAULT; | |
3272 | if (val) | |
3273 | sp->v4mapped = 1; | |
3274 | else | |
3275 | sp->v4mapped = 0; | |
3276 | ||
3277 | return 0; | |
3278 | } | |
3279 | ||
3280 | /* | |
e89c2095 WY |
3281 | * 8.1.16. Get or Set the Maximum Fragmentation Size (SCTP_MAXSEG) |
3282 | * This option will get or set the maximum size to put in any outgoing | |
3283 | * SCTP DATA chunk. If a message is larger than this size it will be | |
1da177e4 LT |
3284 | * fragmented by SCTP into the specified size. Note that the underlying |
3285 | * SCTP implementation may fragment into smaller sized chunks when the | |
3286 | * PMTU of the underlying association is smaller than the value set by | |
e89c2095 WY |
3287 | * the user. The default value for this option is '0' which indicates |
3288 | * the user is NOT limiting fragmentation and only the PMTU will effect | |
3289 | * SCTP's choice of DATA chunk size. Note also that values set larger | |
3290 | * than the maximum size of an IP datagram will effectively let SCTP | |
3291 | * control fragmentation (i.e. the same as setting this option to 0). | |
3292 | * | |
3293 | * The following structure is used to access and modify this parameter: | |
3294 | * | |
3295 | * struct sctp_assoc_value { | |
3296 | * sctp_assoc_t assoc_id; | |
3297 | * uint32_t assoc_value; | |
3298 | * }; | |
3299 | * | |
3300 | * assoc_id: This parameter is ignored for one-to-one style sockets. | |
3301 | * For one-to-many style sockets this parameter indicates which | |
3302 | * association the user is performing an action upon. Note that if | |
3303 | * this field's value is zero then the endpoints default value is | |
3304 | * changed (effecting future associations only). | |
3305 | * assoc_value: This parameter specifies the maximum size in bytes. | |
1da177e4 | 3306 | */ |
b7058842 | 3307 | static int sctp_setsockopt_maxseg(struct sock *sk, char __user *optval, unsigned int optlen) |
1da177e4 | 3308 | { |
ecca8f88 | 3309 | struct sctp_sock *sp = sctp_sk(sk); |
e89c2095 | 3310 | struct sctp_assoc_value params; |
1da177e4 | 3311 | struct sctp_association *asoc; |
1da177e4 LT |
3312 | int val; |
3313 | ||
e89c2095 | 3314 | if (optlen == sizeof(int)) { |
94f65193 | 3315 | pr_warn_ratelimited(DEPRECATED |
f916ec96 | 3316 | "%s (pid %d) " |
94f65193 | 3317 | "Use of int in maxseg socket option.\n" |
f916ec96 NH |
3318 | "Use struct sctp_assoc_value instead\n", |
3319 | current->comm, task_pid_nr(current)); | |
e89c2095 WY |
3320 | if (copy_from_user(&val, optval, optlen)) |
3321 | return -EFAULT; | |
3322 | params.assoc_id = 0; | |
3323 | } else if (optlen == sizeof(struct sctp_assoc_value)) { | |
3324 | if (copy_from_user(¶ms, optval, optlen)) | |
3325 | return -EFAULT; | |
3326 | val = params.assoc_value; | |
ecca8f88 | 3327 | } else { |
1da177e4 | 3328 | return -EINVAL; |
ecca8f88 | 3329 | } |
e89c2095 | 3330 | |
439ef030 MRL |
3331 | asoc = sctp_id2assoc(sk, params.assoc_id); |
3332 | ||
ecca8f88 XL |
3333 | if (val) { |
3334 | int min_len, max_len; | |
439ef030 MRL |
3335 | __u16 datasize = asoc ? sctp_datachk_len(&asoc->stream) : |
3336 | sizeof(struct sctp_data_chunk); | |
1da177e4 | 3337 | |
afd0a800 | 3338 | min_len = sctp_min_frag_point(sp, datasize); |
439ef030 | 3339 | max_len = SCTP_MAX_CHUNK_LEN - datasize; |
e89c2095 | 3340 | |
ecca8f88 XL |
3341 | if (val < min_len || val > max_len) |
3342 | return -EINVAL; | |
3343 | } | |
3344 | ||
e89c2095 | 3345 | if (asoc) { |
f68b2e05 | 3346 | asoc->user_frag = val; |
2f5e3c9d | 3347 | sctp_assoc_update_frag_point(asoc); |
e89c2095 | 3348 | } else { |
ecca8f88 XL |
3349 | if (params.assoc_id && sctp_style(sk, UDP)) |
3350 | return -EINVAL; | |
e89c2095 | 3351 | sp->user_frag = val; |
1da177e4 LT |
3352 | } |
3353 | ||
3354 | return 0; | |
3355 | } | |
3356 | ||
3357 | ||
3358 | /* | |
3359 | * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR) | |
3360 | * | |
3361 | * Requests that the peer mark the enclosed address as the association | |
3362 | * primary. The enclosed address must be one of the association's | |
3363 | * locally bound addresses. The following structure is used to make a | |
3364 | * set primary request: | |
3365 | */ | |
3366 | static int sctp_setsockopt_peer_primary_addr(struct sock *sk, char __user *optval, | |
b7058842 | 3367 | unsigned int optlen) |
1da177e4 | 3368 | { |
e1fc3b14 | 3369 | struct net *net = sock_net(sk); |
1da177e4 | 3370 | struct sctp_sock *sp; |
1da177e4 LT |
3371 | struct sctp_association *asoc = NULL; |
3372 | struct sctp_setpeerprim prim; | |
3373 | struct sctp_chunk *chunk; | |
40a01039 | 3374 | struct sctp_af *af; |
1da177e4 LT |
3375 | int err; |
3376 | ||
3377 | sp = sctp_sk(sk); | |
1da177e4 | 3378 | |
e1fc3b14 | 3379 | if (!net->sctp.addip_enable) |
1da177e4 LT |
3380 | return -EPERM; |
3381 | ||
3382 | if (optlen != sizeof(struct sctp_setpeerprim)) | |
3383 | return -EINVAL; | |
3384 | ||
3385 | if (copy_from_user(&prim, optval, optlen)) | |
3386 | return -EFAULT; | |
3387 | ||
3388 | asoc = sctp_id2assoc(sk, prim.sspp_assoc_id); | |
d808ad9a | 3389 | if (!asoc) |
1da177e4 LT |
3390 | return -EINVAL; |
3391 | ||
3392 | if (!asoc->peer.asconf_capable) | |
3393 | return -EPERM; | |
3394 | ||
3395 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_SET_PRIMARY) | |
3396 | return -EPERM; | |
3397 | ||
3398 | if (!sctp_state(asoc, ESTABLISHED)) | |
3399 | return -ENOTCONN; | |
3400 | ||
40a01039 WY |
3401 | af = sctp_get_af_specific(prim.sspp_addr.ss_family); |
3402 | if (!af) | |
3403 | return -EINVAL; | |
3404 | ||
3405 | if (!af->addr_valid((union sctp_addr *)&prim.sspp_addr, sp, NULL)) | |
3406 | return -EADDRNOTAVAIL; | |
3407 | ||
1da177e4 LT |
3408 | if (!sctp_assoc_lookup_laddr(asoc, (union sctp_addr *)&prim.sspp_addr)) |
3409 | return -EADDRNOTAVAIL; | |
3410 | ||
2277c7cd RH |
3411 | /* Allow security module to validate address. */ |
3412 | err = security_sctp_bind_connect(sk, SCTP_SET_PEER_PRIMARY_ADDR, | |
3413 | (struct sockaddr *)&prim.sspp_addr, | |
3414 | af->sockaddr_len); | |
3415 | if (err) | |
3416 | return err; | |
3417 | ||
1da177e4 LT |
3418 | /* Create an ASCONF chunk with SET_PRIMARY parameter */ |
3419 | chunk = sctp_make_asconf_set_prim(asoc, | |
3420 | (union sctp_addr *)&prim.sspp_addr); | |
3421 | if (!chunk) | |
3422 | return -ENOMEM; | |
3423 | ||
3424 | err = sctp_send_asconf(asoc, chunk); | |
3425 | ||
bb33381d | 3426 | pr_debug("%s: we set peer primary addr primitively\n", __func__); |
1da177e4 LT |
3427 | |
3428 | return err; | |
3429 | } | |
3430 | ||
0f3fffd8 | 3431 | static int sctp_setsockopt_adaptation_layer(struct sock *sk, char __user *optval, |
b7058842 | 3432 | unsigned int optlen) |
1da177e4 | 3433 | { |
0f3fffd8 | 3434 | struct sctp_setadaptation adaptation; |
1da177e4 | 3435 | |
0f3fffd8 | 3436 | if (optlen != sizeof(struct sctp_setadaptation)) |
1da177e4 | 3437 | return -EINVAL; |
0f3fffd8 | 3438 | if (copy_from_user(&adaptation, optval, optlen)) |
1da177e4 LT |
3439 | return -EFAULT; |
3440 | ||
0f3fffd8 | 3441 | sctp_sk(sk)->adaptation_ind = adaptation.ssb_adaptation_ind; |
1da177e4 LT |
3442 | |
3443 | return 0; | |
3444 | } | |
3445 | ||
6ab792f5 ISJ |
3446 | /* |
3447 | * 7.1.29. Set or Get the default context (SCTP_CONTEXT) | |
3448 | * | |
3449 | * The context field in the sctp_sndrcvinfo structure is normally only | |
3450 | * used when a failed message is retrieved holding the value that was | |
3451 | * sent down on the actual send call. This option allows the setting of | |
3452 | * a default context on an association basis that will be received on | |
3453 | * reading messages from the peer. This is especially helpful in the | |
3454 | * one-2-many model for an application to keep some reference to an | |
3455 | * internal state machine that is processing messages on the | |
3456 | * association. Note that the setting of this value only effects | |
3457 | * received messages from the peer and does not effect the value that is | |
3458 | * saved with outbound messages. | |
3459 | */ | |
3460 | static int sctp_setsockopt_context(struct sock *sk, char __user *optval, | |
b7058842 | 3461 | unsigned int optlen) |
6ab792f5 ISJ |
3462 | { |
3463 | struct sctp_assoc_value params; | |
3464 | struct sctp_sock *sp; | |
3465 | struct sctp_association *asoc; | |
3466 | ||
3467 | if (optlen != sizeof(struct sctp_assoc_value)) | |
3468 | return -EINVAL; | |
3469 | if (copy_from_user(¶ms, optval, optlen)) | |
3470 | return -EFAULT; | |
3471 | ||
3472 | sp = sctp_sk(sk); | |
3473 | ||
3474 | if (params.assoc_id != 0) { | |
3475 | asoc = sctp_id2assoc(sk, params.assoc_id); | |
3476 | if (!asoc) | |
3477 | return -EINVAL; | |
3478 | asoc->default_rcv_context = params.assoc_value; | |
3479 | } else { | |
3480 | sp->default_rcv_context = params.assoc_value; | |
3481 | } | |
3482 | ||
3483 | return 0; | |
3484 | } | |
3485 | ||
b6e1331f VY |
3486 | /* |
3487 | * 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE) | |
3488 | * | |
3489 | * This options will at a minimum specify if the implementation is doing | |
3490 | * fragmented interleave. Fragmented interleave, for a one to many | |
3491 | * socket, is when subsequent calls to receive a message may return | |
3492 | * parts of messages from different associations. Some implementations | |
3493 | * may allow you to turn this value on or off. If so, when turned off, | |
3494 | * no fragment interleave will occur (which will cause a head of line | |
3495 | * blocking amongst multiple associations sharing the same one to many | |
3496 | * socket). When this option is turned on, then each receive call may | |
3497 | * come from a different association (thus the user must receive data | |
3498 | * with the extended calls (e.g. sctp_recvmsg) to keep track of which | |
3499 | * association each receive belongs to. | |
3500 | * | |
3501 | * This option takes a boolean value. A non-zero value indicates that | |
3502 | * fragmented interleave is on. A value of zero indicates that | |
3503 | * fragmented interleave is off. | |
3504 | * | |
3505 | * Note that it is important that an implementation that allows this | |
3506 | * option to be turned on, have it off by default. Otherwise an unaware | |
3507 | * application using the one to many model may become confused and act | |
3508 | * incorrectly. | |
3509 | */ | |
3510 | static int sctp_setsockopt_fragment_interleave(struct sock *sk, | |
3511 | char __user *optval, | |
b7058842 | 3512 | unsigned int optlen) |
b6e1331f VY |
3513 | { |
3514 | int val; | |
3515 | ||
3516 | if (optlen != sizeof(int)) | |
3517 | return -EINVAL; | |
3518 | if (get_user(val, (int __user *)optval)) | |
3519 | return -EFAULT; | |
3520 | ||
772a5869 XL |
3521 | sctp_sk(sk)->frag_interleave = !!val; |
3522 | ||
3523 | if (!sctp_sk(sk)->frag_interleave) | |
3524 | sctp_sk(sk)->strm_interleave = 0; | |
b6e1331f VY |
3525 | |
3526 | return 0; | |
3527 | } | |
3528 | ||
d49d91d7 | 3529 | /* |
8510b937 | 3530 | * 8.1.21. Set or Get the SCTP Partial Delivery Point |
d49d91d7 | 3531 | * (SCTP_PARTIAL_DELIVERY_POINT) |
8510b937 | 3532 | * |
d49d91d7 VY |
3533 | * This option will set or get the SCTP partial delivery point. This |
3534 | * point is the size of a message where the partial delivery API will be | |
3535 | * invoked to help free up rwnd space for the peer. Setting this to a | |
8510b937 | 3536 | * lower value will cause partial deliveries to happen more often. The |
d49d91d7 | 3537 | * calls argument is an integer that sets or gets the partial delivery |
8510b937 WY |
3538 | * point. Note also that the call will fail if the user attempts to set |
3539 | * this value larger than the socket receive buffer size. | |
3540 | * | |
3541 | * Note that any single message having a length smaller than or equal to | |
3542 | * the SCTP partial delivery point will be delivered in one single read | |
3543 | * call as long as the user provided buffer is large enough to hold the | |
3544 | * message. | |
d49d91d7 VY |
3545 | */ |
3546 | static int sctp_setsockopt_partial_delivery_point(struct sock *sk, | |
3547 | char __user *optval, | |
b7058842 | 3548 | unsigned int optlen) |
d49d91d7 VY |
3549 | { |
3550 | u32 val; | |
3551 | ||
3552 | if (optlen != sizeof(u32)) | |
3553 | return -EINVAL; | |
3554 | if (get_user(val, (int __user *)optval)) | |
3555 | return -EFAULT; | |
3556 | ||
8510b937 WY |
3557 | /* Note: We double the receive buffer from what the user sets |
3558 | * it to be, also initial rwnd is based on rcvbuf/2. | |
3559 | */ | |
3560 | if (val > (sk->sk_rcvbuf >> 1)) | |
3561 | return -EINVAL; | |
3562 | ||
d49d91d7 VY |
3563 | sctp_sk(sk)->pd_point = val; |
3564 | ||
3565 | return 0; /* is this the right error code? */ | |
3566 | } | |
3567 | ||
70331571 VY |
3568 | /* |
3569 | * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST) | |
3570 | * | |
3571 | * This option will allow a user to change the maximum burst of packets | |
3572 | * that can be emitted by this association. Note that the default value | |
3573 | * is 4, and some implementations may restrict this setting so that it | |
3574 | * can only be lowered. | |
3575 | * | |
3576 | * NOTE: This text doesn't seem right. Do this on a socket basis with | |
3577 | * future associations inheriting the socket value. | |
3578 | */ | |
3579 | static int sctp_setsockopt_maxburst(struct sock *sk, | |
3580 | char __user *optval, | |
b7058842 | 3581 | unsigned int optlen) |
70331571 | 3582 | { |
219b99a9 NH |
3583 | struct sctp_assoc_value params; |
3584 | struct sctp_sock *sp; | |
3585 | struct sctp_association *asoc; | |
70331571 | 3586 | int val; |
219b99a9 | 3587 | int assoc_id = 0; |
70331571 | 3588 | |
219b99a9 | 3589 | if (optlen == sizeof(int)) { |
94f65193 | 3590 | pr_warn_ratelimited(DEPRECATED |
f916ec96 | 3591 | "%s (pid %d) " |
94f65193 | 3592 | "Use of int in max_burst socket option deprecated.\n" |
f916ec96 NH |
3593 | "Use struct sctp_assoc_value instead\n", |
3594 | current->comm, task_pid_nr(current)); | |
219b99a9 NH |
3595 | if (copy_from_user(&val, optval, optlen)) |
3596 | return -EFAULT; | |
3597 | } else if (optlen == sizeof(struct sctp_assoc_value)) { | |
3598 | if (copy_from_user(¶ms, optval, optlen)) | |
3599 | return -EFAULT; | |
3600 | val = params.assoc_value; | |
3601 | assoc_id = params.assoc_id; | |
3602 | } else | |
70331571 VY |
3603 | return -EINVAL; |
3604 | ||
219b99a9 NH |
3605 | sp = sctp_sk(sk); |
3606 | ||
3607 | if (assoc_id != 0) { | |
3608 | asoc = sctp_id2assoc(sk, assoc_id); | |
3609 | if (!asoc) | |
3610 | return -EINVAL; | |
3611 | asoc->max_burst = val; | |
3612 | } else | |
3613 | sp->max_burst = val; | |
70331571 VY |
3614 | |
3615 | return 0; | |
3616 | } | |
3617 | ||
65b07e5d VY |
3618 | /* |
3619 | * 7.1.18. Add a chunk that must be authenticated (SCTP_AUTH_CHUNK) | |
3620 | * | |
3621 | * This set option adds a chunk type that the user is requesting to be | |
3622 | * received only in an authenticated way. Changes to the list of chunks | |
3623 | * will only effect future associations on the socket. | |
3624 | */ | |
3625 | static int sctp_setsockopt_auth_chunk(struct sock *sk, | |
b7058842 DM |
3626 | char __user *optval, |
3627 | unsigned int optlen) | |
65b07e5d | 3628 | { |
b14878cc | 3629 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d VY |
3630 | struct sctp_authchunk val; |
3631 | ||
b14878cc | 3632 | if (!ep->auth_enable) |
5e739d17 VY |
3633 | return -EACCES; |
3634 | ||
65b07e5d VY |
3635 | if (optlen != sizeof(struct sctp_authchunk)) |
3636 | return -EINVAL; | |
3637 | if (copy_from_user(&val, optval, optlen)) | |
3638 | return -EFAULT; | |
3639 | ||
3640 | switch (val.sauth_chunk) { | |
7fd71b1e JP |
3641 | case SCTP_CID_INIT: |
3642 | case SCTP_CID_INIT_ACK: | |
3643 | case SCTP_CID_SHUTDOWN_COMPLETE: | |
3644 | case SCTP_CID_AUTH: | |
3645 | return -EINVAL; | |
65b07e5d VY |
3646 | } |
3647 | ||
3648 | /* add this chunk id to the endpoint */ | |
b14878cc | 3649 | return sctp_auth_ep_add_chunkid(ep, val.sauth_chunk); |
65b07e5d VY |
3650 | } |
3651 | ||
3652 | /* | |
3653 | * 7.1.19. Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT) | |
3654 | * | |
3655 | * This option gets or sets the list of HMAC algorithms that the local | |
3656 | * endpoint requires the peer to use. | |
3657 | */ | |
3658 | static int sctp_setsockopt_hmac_ident(struct sock *sk, | |
b7058842 DM |
3659 | char __user *optval, |
3660 | unsigned int optlen) | |
65b07e5d | 3661 | { |
b14878cc | 3662 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d | 3663 | struct sctp_hmacalgo *hmacs; |
d9724055 | 3664 | u32 idents; |
65b07e5d VY |
3665 | int err; |
3666 | ||
b14878cc | 3667 | if (!ep->auth_enable) |
5e739d17 VY |
3668 | return -EACCES; |
3669 | ||
65b07e5d VY |
3670 | if (optlen < sizeof(struct sctp_hmacalgo)) |
3671 | return -EINVAL; | |
5960cefa MRL |
3672 | optlen = min_t(unsigned int, optlen, sizeof(struct sctp_hmacalgo) + |
3673 | SCTP_AUTH_NUM_HMACS * sizeof(u16)); | |
65b07e5d | 3674 | |
cb3f837b | 3675 | hmacs = memdup_user(optval, optlen); |
934253a7 SW |
3676 | if (IS_ERR(hmacs)) |
3677 | return PTR_ERR(hmacs); | |
65b07e5d | 3678 | |
d9724055 VY |
3679 | idents = hmacs->shmac_num_idents; |
3680 | if (idents == 0 || idents > SCTP_AUTH_NUM_HMACS || | |
3681 | (idents * sizeof(u16)) > (optlen - sizeof(struct sctp_hmacalgo))) { | |
65b07e5d VY |
3682 | err = -EINVAL; |
3683 | goto out; | |
3684 | } | |
3685 | ||
b14878cc | 3686 | err = sctp_auth_ep_set_hmacs(ep, hmacs); |
65b07e5d VY |
3687 | out: |
3688 | kfree(hmacs); | |
3689 | return err; | |
3690 | } | |
3691 | ||
3692 | /* | |
3693 | * 7.1.20. Set a shared key (SCTP_AUTH_KEY) | |
3694 | * | |
3695 | * This option will set a shared secret key which is used to build an | |
3696 | * association shared key. | |
3697 | */ | |
3698 | static int sctp_setsockopt_auth_key(struct sock *sk, | |
3699 | char __user *optval, | |
b7058842 | 3700 | unsigned int optlen) |
65b07e5d | 3701 | { |
b14878cc | 3702 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d VY |
3703 | struct sctp_authkey *authkey; |
3704 | struct sctp_association *asoc; | |
3705 | int ret; | |
3706 | ||
b14878cc | 3707 | if (!ep->auth_enable) |
5e739d17 VY |
3708 | return -EACCES; |
3709 | ||
65b07e5d VY |
3710 | if (optlen <= sizeof(struct sctp_authkey)) |
3711 | return -EINVAL; | |
5960cefa MRL |
3712 | /* authkey->sca_keylength is u16, so optlen can't be bigger than |
3713 | * this. | |
3714 | */ | |
3715 | optlen = min_t(unsigned int, optlen, USHRT_MAX + | |
3716 | sizeof(struct sctp_authkey)); | |
65b07e5d | 3717 | |
cb3f837b | 3718 | authkey = memdup_user(optval, optlen); |
934253a7 SW |
3719 | if (IS_ERR(authkey)) |
3720 | return PTR_ERR(authkey); | |
65b07e5d | 3721 | |
328fc47e | 3722 | if (authkey->sca_keylength > optlen - sizeof(struct sctp_authkey)) { |
30c2235c VY |
3723 | ret = -EINVAL; |
3724 | goto out; | |
3725 | } | |
3726 | ||
65b07e5d VY |
3727 | asoc = sctp_id2assoc(sk, authkey->sca_assoc_id); |
3728 | if (!asoc && authkey->sca_assoc_id && sctp_style(sk, UDP)) { | |
3729 | ret = -EINVAL; | |
3730 | goto out; | |
3731 | } | |
3732 | ||
b14878cc | 3733 | ret = sctp_auth_set_key(ep, asoc, authkey); |
65b07e5d | 3734 | out: |
6ba542a2 | 3735 | kzfree(authkey); |
65b07e5d VY |
3736 | return ret; |
3737 | } | |
3738 | ||
3739 | /* | |
3740 | * 7.1.21. Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY) | |
3741 | * | |
3742 | * This option will get or set the active shared key to be used to build | |
3743 | * the association shared key. | |
3744 | */ | |
3745 | static int sctp_setsockopt_active_key(struct sock *sk, | |
b7058842 DM |
3746 | char __user *optval, |
3747 | unsigned int optlen) | |
65b07e5d | 3748 | { |
b14878cc | 3749 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d VY |
3750 | struct sctp_authkeyid val; |
3751 | struct sctp_association *asoc; | |
3752 | ||
b14878cc | 3753 | if (!ep->auth_enable) |
5e739d17 VY |
3754 | return -EACCES; |
3755 | ||
65b07e5d VY |
3756 | if (optlen != sizeof(struct sctp_authkeyid)) |
3757 | return -EINVAL; | |
3758 | if (copy_from_user(&val, optval, optlen)) | |
3759 | return -EFAULT; | |
3760 | ||
3761 | asoc = sctp_id2assoc(sk, val.scact_assoc_id); | |
3762 | if (!asoc && val.scact_assoc_id && sctp_style(sk, UDP)) | |
3763 | return -EINVAL; | |
3764 | ||
b14878cc | 3765 | return sctp_auth_set_active_key(ep, asoc, val.scact_keynumber); |
65b07e5d VY |
3766 | } |
3767 | ||
3768 | /* | |
3769 | * 7.1.22. Delete a shared key (SCTP_AUTH_DELETE_KEY) | |
3770 | * | |
3771 | * This set option will delete a shared secret key from use. | |
3772 | */ | |
3773 | static int sctp_setsockopt_del_key(struct sock *sk, | |
b7058842 DM |
3774 | char __user *optval, |
3775 | unsigned int optlen) | |
65b07e5d | 3776 | { |
b14878cc | 3777 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d VY |
3778 | struct sctp_authkeyid val; |
3779 | struct sctp_association *asoc; | |
3780 | ||
b14878cc | 3781 | if (!ep->auth_enable) |
5e739d17 VY |
3782 | return -EACCES; |
3783 | ||
65b07e5d VY |
3784 | if (optlen != sizeof(struct sctp_authkeyid)) |
3785 | return -EINVAL; | |
3786 | if (copy_from_user(&val, optval, optlen)) | |
3787 | return -EFAULT; | |
3788 | ||
3789 | asoc = sctp_id2assoc(sk, val.scact_assoc_id); | |
3790 | if (!asoc && val.scact_assoc_id && sctp_style(sk, UDP)) | |
3791 | return -EINVAL; | |
3792 | ||
b14878cc | 3793 | return sctp_auth_del_key_id(ep, asoc, val.scact_keynumber); |
65b07e5d VY |
3794 | |
3795 | } | |
3796 | ||
601590ec XL |
3797 | /* |
3798 | * 8.3.4 Deactivate a Shared Key (SCTP_AUTH_DEACTIVATE_KEY) | |
3799 | * | |
3800 | * This set option will deactivate a shared secret key. | |
3801 | */ | |
3802 | static int sctp_setsockopt_deactivate_key(struct sock *sk, char __user *optval, | |
3803 | unsigned int optlen) | |
3804 | { | |
3805 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; | |
3806 | struct sctp_authkeyid val; | |
3807 | struct sctp_association *asoc; | |
3808 | ||
3809 | if (!ep->auth_enable) | |
3810 | return -EACCES; | |
3811 | ||
3812 | if (optlen != sizeof(struct sctp_authkeyid)) | |
3813 | return -EINVAL; | |
3814 | if (copy_from_user(&val, optval, optlen)) | |
3815 | return -EFAULT; | |
3816 | ||
3817 | asoc = sctp_id2assoc(sk, val.scact_assoc_id); | |
3818 | if (!asoc && val.scact_assoc_id && sctp_style(sk, UDP)) | |
3819 | return -EINVAL; | |
3820 | ||
3821 | return sctp_auth_deact_key_id(ep, asoc, val.scact_keynumber); | |
3822 | } | |
3823 | ||
7dc04d71 MH |
3824 | /* |
3825 | * 8.1.23 SCTP_AUTO_ASCONF | |
3826 | * | |
3827 | * This option will enable or disable the use of the automatic generation of | |
3828 | * ASCONF chunks to add and delete addresses to an existing association. Note | |
3829 | * that this option has two caveats namely: a) it only affects sockets that | |
3830 | * are bound to all addresses available to the SCTP stack, and b) the system | |
3831 | * administrator may have an overriding control that turns the ASCONF feature | |
3832 | * off no matter what setting the socket option may have. | |
3833 | * This option expects an integer boolean flag, where a non-zero value turns on | |
3834 | * the option, and a zero value turns off the option. | |
3835 | * Note. In this implementation, socket operation overrides default parameter | |
3836 | * being set by sysctl as well as FreeBSD implementation | |
3837 | */ | |
3838 | static int sctp_setsockopt_auto_asconf(struct sock *sk, char __user *optval, | |
3839 | unsigned int optlen) | |
3840 | { | |
3841 | int val; | |
3842 | struct sctp_sock *sp = sctp_sk(sk); | |
3843 | ||
3844 | if (optlen < sizeof(int)) | |
3845 | return -EINVAL; | |
3846 | if (get_user(val, (int __user *)optval)) | |
3847 | return -EFAULT; | |
3848 | if (!sctp_is_ep_boundall(sk) && val) | |
3849 | return -EINVAL; | |
3850 | if ((val && sp->do_auto_asconf) || (!val && !sp->do_auto_asconf)) | |
3851 | return 0; | |
3852 | ||
2d45a02d | 3853 | spin_lock_bh(&sock_net(sk)->sctp.addr_wq_lock); |
7dc04d71 MH |
3854 | if (val == 0 && sp->do_auto_asconf) { |
3855 | list_del(&sp->auto_asconf_list); | |
3856 | sp->do_auto_asconf = 0; | |
3857 | } else if (val && !sp->do_auto_asconf) { | |
3858 | list_add_tail(&sp->auto_asconf_list, | |
4db67e80 | 3859 | &sock_net(sk)->sctp.auto_asconf_splist); |
7dc04d71 MH |
3860 | sp->do_auto_asconf = 1; |
3861 | } | |
2d45a02d | 3862 | spin_unlock_bh(&sock_net(sk)->sctp.addr_wq_lock); |
7dc04d71 MH |
3863 | return 0; |
3864 | } | |
3865 | ||
5aa93bcf NH |
3866 | /* |
3867 | * SCTP_PEER_ADDR_THLDS | |
3868 | * | |
3869 | * This option allows us to alter the partially failed threshold for one or all | |
3870 | * transports in an association. See Section 6.1 of: | |
3871 | * http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txt | |
3872 | */ | |
3873 | static int sctp_setsockopt_paddr_thresholds(struct sock *sk, | |
3874 | char __user *optval, | |
3875 | unsigned int optlen) | |
3876 | { | |
3877 | struct sctp_paddrthlds val; | |
3878 | struct sctp_transport *trans; | |
3879 | struct sctp_association *asoc; | |
3880 | ||
3881 | if (optlen < sizeof(struct sctp_paddrthlds)) | |
3882 | return -EINVAL; | |
3883 | if (copy_from_user(&val, (struct sctp_paddrthlds __user *)optval, | |
3884 | sizeof(struct sctp_paddrthlds))) | |
3885 | return -EFAULT; | |
3886 | ||
3887 | ||
3888 | if (sctp_is_any(sk, (const union sctp_addr *)&val.spt_address)) { | |
3889 | asoc = sctp_id2assoc(sk, val.spt_assoc_id); | |
3890 | if (!asoc) | |
3891 | return -ENOENT; | |
3892 | list_for_each_entry(trans, &asoc->peer.transport_addr_list, | |
3893 | transports) { | |
3894 | if (val.spt_pathmaxrxt) | |
3895 | trans->pathmaxrxt = val.spt_pathmaxrxt; | |
3896 | trans->pf_retrans = val.spt_pathpfthld; | |
3897 | } | |
3898 | ||
3899 | if (val.spt_pathmaxrxt) | |
3900 | asoc->pathmaxrxt = val.spt_pathmaxrxt; | |
3901 | asoc->pf_retrans = val.spt_pathpfthld; | |
3902 | } else { | |
3903 | trans = sctp_addr_id2transport(sk, &val.spt_address, | |
3904 | val.spt_assoc_id); | |
3905 | if (!trans) | |
3906 | return -ENOENT; | |
3907 | ||
3908 | if (val.spt_pathmaxrxt) | |
3909 | trans->pathmaxrxt = val.spt_pathmaxrxt; | |
3910 | trans->pf_retrans = val.spt_pathpfthld; | |
3911 | } | |
3912 | ||
3913 | return 0; | |
3914 | } | |
3915 | ||
0d3a421d GOV |
3916 | static int sctp_setsockopt_recvrcvinfo(struct sock *sk, |
3917 | char __user *optval, | |
3918 | unsigned int optlen) | |
3919 | { | |
3920 | int val; | |
3921 | ||
3922 | if (optlen < sizeof(int)) | |
3923 | return -EINVAL; | |
3924 | if (get_user(val, (int __user *) optval)) | |
3925 | return -EFAULT; | |
3926 | ||
3927 | sctp_sk(sk)->recvrcvinfo = (val == 0) ? 0 : 1; | |
3928 | ||
3929 | return 0; | |
3930 | } | |
3931 | ||
2347c80f GOV |
3932 | static int sctp_setsockopt_recvnxtinfo(struct sock *sk, |
3933 | char __user *optval, | |
3934 | unsigned int optlen) | |
3935 | { | |
3936 | int val; | |
3937 | ||
3938 | if (optlen < sizeof(int)) | |
3939 | return -EINVAL; | |
3940 | if (get_user(val, (int __user *) optval)) | |
3941 | return -EFAULT; | |
3942 | ||
3943 | sctp_sk(sk)->recvnxtinfo = (val == 0) ? 0 : 1; | |
3944 | ||
3945 | return 0; | |
3946 | } | |
3947 | ||
28aa4c26 XL |
3948 | static int sctp_setsockopt_pr_supported(struct sock *sk, |
3949 | char __user *optval, | |
3950 | unsigned int optlen) | |
3951 | { | |
3952 | struct sctp_assoc_value params; | |
28aa4c26 XL |
3953 | |
3954 | if (optlen != sizeof(params)) | |
cc3ccf26 | 3955 | return -EINVAL; |
28aa4c26 | 3956 | |
cc3ccf26 XL |
3957 | if (copy_from_user(¶ms, optval, optlen)) |
3958 | return -EFAULT; | |
28aa4c26 | 3959 | |
cc3ccf26 | 3960 | sctp_sk(sk)->ep->prsctp_enable = !!params.assoc_value; |
28aa4c26 | 3961 | |
cc3ccf26 | 3962 | return 0; |
28aa4c26 XL |
3963 | } |
3964 | ||
f959fb44 XL |
3965 | static int sctp_setsockopt_default_prinfo(struct sock *sk, |
3966 | char __user *optval, | |
3967 | unsigned int optlen) | |
3968 | { | |
3969 | struct sctp_default_prinfo info; | |
3970 | struct sctp_association *asoc; | |
3971 | int retval = -EINVAL; | |
3972 | ||
3973 | if (optlen != sizeof(info)) | |
3974 | goto out; | |
3975 | ||
3976 | if (copy_from_user(&info, optval, sizeof(info))) { | |
3977 | retval = -EFAULT; | |
3978 | goto out; | |
3979 | } | |
3980 | ||
3981 | if (info.pr_policy & ~SCTP_PR_SCTP_MASK) | |
3982 | goto out; | |
3983 | ||
3984 | if (info.pr_policy == SCTP_PR_SCTP_NONE) | |
3985 | info.pr_value = 0; | |
3986 | ||
3987 | asoc = sctp_id2assoc(sk, info.pr_assoc_id); | |
3988 | if (asoc) { | |
3989 | SCTP_PR_SET_POLICY(asoc->default_flags, info.pr_policy); | |
3990 | asoc->default_timetolive = info.pr_value; | |
3991 | } else if (!info.pr_assoc_id) { | |
3992 | struct sctp_sock *sp = sctp_sk(sk); | |
3993 | ||
3994 | SCTP_PR_SET_POLICY(sp->default_flags, info.pr_policy); | |
3995 | sp->default_timetolive = info.pr_value; | |
3996 | } else { | |
3997 | goto out; | |
3998 | } | |
3999 | ||
4000 | retval = 0; | |
4001 | ||
4002 | out: | |
4003 | return retval; | |
4004 | } | |
4005 | ||
c0d8bab6 XL |
4006 | static int sctp_setsockopt_reconfig_supported(struct sock *sk, |
4007 | char __user *optval, | |
4008 | unsigned int optlen) | |
4009 | { | |
4010 | struct sctp_assoc_value params; | |
4011 | struct sctp_association *asoc; | |
4012 | int retval = -EINVAL; | |
4013 | ||
4014 | if (optlen != sizeof(params)) | |
4015 | goto out; | |
4016 | ||
4017 | if (copy_from_user(¶ms, optval, optlen)) { | |
4018 | retval = -EFAULT; | |
4019 | goto out; | |
4020 | } | |
4021 | ||
4022 | asoc = sctp_id2assoc(sk, params.assoc_id); | |
4023 | if (asoc) { | |
4024 | asoc->reconf_enable = !!params.assoc_value; | |
4025 | } else if (!params.assoc_id) { | |
4026 | struct sctp_sock *sp = sctp_sk(sk); | |
4027 | ||
4028 | sp->ep->reconf_enable = !!params.assoc_value; | |
4029 | } else { | |
4030 | goto out; | |
4031 | } | |
4032 | ||
4033 | retval = 0; | |
4034 | ||
4035 | out: | |
4036 | return retval; | |
4037 | } | |
4038 | ||
9fb657ae XL |
4039 | static int sctp_setsockopt_enable_strreset(struct sock *sk, |
4040 | char __user *optval, | |
4041 | unsigned int optlen) | |
4042 | { | |
4043 | struct sctp_assoc_value params; | |
4044 | struct sctp_association *asoc; | |
4045 | int retval = -EINVAL; | |
4046 | ||
4047 | if (optlen != sizeof(params)) | |
4048 | goto out; | |
4049 | ||
4050 | if (copy_from_user(¶ms, optval, optlen)) { | |
4051 | retval = -EFAULT; | |
4052 | goto out; | |
4053 | } | |
4054 | ||
4055 | if (params.assoc_value & (~SCTP_ENABLE_STRRESET_MASK)) | |
4056 | goto out; | |
4057 | ||
4058 | asoc = sctp_id2assoc(sk, params.assoc_id); | |
4059 | if (asoc) { | |
4060 | asoc->strreset_enable = params.assoc_value; | |
4061 | } else if (!params.assoc_id) { | |
4062 | struct sctp_sock *sp = sctp_sk(sk); | |
4063 | ||
4064 | sp->ep->strreset_enable = params.assoc_value; | |
4065 | } else { | |
4066 | goto out; | |
4067 | } | |
4068 | ||
4069 | retval = 0; | |
4070 | ||
4071 | out: | |
4072 | return retval; | |
4073 | } | |
4074 | ||
7f9d68ac XL |
4075 | static int sctp_setsockopt_reset_streams(struct sock *sk, |
4076 | char __user *optval, | |
4077 | unsigned int optlen) | |
4078 | { | |
4079 | struct sctp_reset_streams *params; | |
4080 | struct sctp_association *asoc; | |
4081 | int retval = -EINVAL; | |
4082 | ||
2342b8d9 | 4083 | if (optlen < sizeof(*params)) |
7f9d68ac | 4084 | return -EINVAL; |
5960cefa MRL |
4085 | /* srs_number_streams is u16, so optlen can't be bigger than this. */ |
4086 | optlen = min_t(unsigned int, optlen, USHRT_MAX + | |
4087 | sizeof(__u16) * sizeof(*params)); | |
7f9d68ac XL |
4088 | |
4089 | params = memdup_user(optval, optlen); | |
4090 | if (IS_ERR(params)) | |
4091 | return PTR_ERR(params); | |
4092 | ||
2342b8d9 XL |
4093 | if (params->srs_number_streams * sizeof(__u16) > |
4094 | optlen - sizeof(*params)) | |
4095 | goto out; | |
4096 | ||
7f9d68ac XL |
4097 | asoc = sctp_id2assoc(sk, params->srs_assoc_id); |
4098 | if (!asoc) | |
4099 | goto out; | |
4100 | ||
4101 | retval = sctp_send_reset_streams(asoc, params); | |
4102 | ||
4103 | out: | |
4104 | kfree(params); | |
4105 | return retval; | |
4106 | } | |
4107 | ||
a92ce1a4 XL |
4108 | static int sctp_setsockopt_reset_assoc(struct sock *sk, |
4109 | char __user *optval, | |
4110 | unsigned int optlen) | |
4111 | { | |
4112 | struct sctp_association *asoc; | |
4113 | sctp_assoc_t associd; | |
4114 | int retval = -EINVAL; | |
4115 | ||
4116 | if (optlen != sizeof(associd)) | |
4117 | goto out; | |
4118 | ||
4119 | if (copy_from_user(&associd, optval, optlen)) { | |
4120 | retval = -EFAULT; | |
4121 | goto out; | |
4122 | } | |
4123 | ||
4124 | asoc = sctp_id2assoc(sk, associd); | |
4125 | if (!asoc) | |
4126 | goto out; | |
4127 | ||
4128 | retval = sctp_send_reset_assoc(asoc); | |
4129 | ||
4130 | out: | |
4131 | return retval; | |
4132 | } | |
4133 | ||
242bd2d5 XL |
4134 | static int sctp_setsockopt_add_streams(struct sock *sk, |
4135 | char __user *optval, | |
4136 | unsigned int optlen) | |
4137 | { | |
4138 | struct sctp_association *asoc; | |
4139 | struct sctp_add_streams params; | |
4140 | int retval = -EINVAL; | |
4141 | ||
4142 | if (optlen != sizeof(params)) | |
4143 | goto out; | |
4144 | ||
4145 | if (copy_from_user(¶ms, optval, optlen)) { | |
4146 | retval = -EFAULT; | |
4147 | goto out; | |
4148 | } | |
4149 | ||
4150 | asoc = sctp_id2assoc(sk, params.sas_assoc_id); | |
4151 | if (!asoc) | |
4152 | goto out; | |
4153 | ||
4154 | retval = sctp_send_add_streams(asoc, ¶ms); | |
4155 | ||
4156 | out: | |
4157 | return retval; | |
4158 | } | |
4159 | ||
13aa8770 MRL |
4160 | static int sctp_setsockopt_scheduler(struct sock *sk, |
4161 | char __user *optval, | |
4162 | unsigned int optlen) | |
4163 | { | |
4164 | struct sctp_association *asoc; | |
4165 | struct sctp_assoc_value params; | |
4166 | int retval = -EINVAL; | |
4167 | ||
4168 | if (optlen < sizeof(params)) | |
4169 | goto out; | |
4170 | ||
4171 | optlen = sizeof(params); | |
4172 | if (copy_from_user(¶ms, optval, optlen)) { | |
4173 | retval = -EFAULT; | |
4174 | goto out; | |
4175 | } | |
4176 | ||
4177 | if (params.assoc_value > SCTP_SS_MAX) | |
4178 | goto out; | |
4179 | ||
4180 | asoc = sctp_id2assoc(sk, params.assoc_id); | |
4181 | if (!asoc) | |
4182 | goto out; | |
4183 | ||
4184 | retval = sctp_sched_set_sched(asoc, params.assoc_value); | |
4185 | ||
4186 | out: | |
4187 | return retval; | |
4188 | } | |
4189 | ||
0ccdf3c7 MRL |
4190 | static int sctp_setsockopt_scheduler_value(struct sock *sk, |
4191 | char __user *optval, | |
4192 | unsigned int optlen) | |
4193 | { | |
4194 | struct sctp_association *asoc; | |
4195 | struct sctp_stream_value params; | |
4196 | int retval = -EINVAL; | |
4197 | ||
4198 | if (optlen < sizeof(params)) | |
4199 | goto out; | |
4200 | ||
4201 | optlen = sizeof(params); | |
4202 | if (copy_from_user(¶ms, optval, optlen)) { | |
4203 | retval = -EFAULT; | |
4204 | goto out; | |
4205 | } | |
4206 | ||
4207 | asoc = sctp_id2assoc(sk, params.assoc_id); | |
4208 | if (!asoc) | |
4209 | goto out; | |
4210 | ||
4211 | retval = sctp_sched_set_value(asoc, params.stream_id, | |
4212 | params.stream_value, GFP_KERNEL); | |
4213 | ||
4214 | out: | |
4215 | return retval; | |
4216 | } | |
4217 | ||
772a5869 XL |
4218 | static int sctp_setsockopt_interleaving_supported(struct sock *sk, |
4219 | char __user *optval, | |
4220 | unsigned int optlen) | |
4221 | { | |
4222 | struct sctp_sock *sp = sctp_sk(sk); | |
4223 | struct net *net = sock_net(sk); | |
4224 | struct sctp_assoc_value params; | |
4225 | int retval = -EINVAL; | |
4226 | ||
4227 | if (optlen < sizeof(params)) | |
4228 | goto out; | |
4229 | ||
4230 | optlen = sizeof(params); | |
4231 | if (copy_from_user(¶ms, optval, optlen)) { | |
4232 | retval = -EFAULT; | |
4233 | goto out; | |
4234 | } | |
4235 | ||
4236 | if (params.assoc_id) | |
4237 | goto out; | |
4238 | ||
4239 | if (!net->sctp.intl_enable || !sp->frag_interleave) { | |
4240 | retval = -EPERM; | |
4241 | goto out; | |
4242 | } | |
4243 | ||
4244 | sp->strm_interleave = !!params.assoc_value; | |
4245 | ||
4246 | retval = 0; | |
4247 | ||
4248 | out: | |
4249 | return retval; | |
4250 | } | |
4251 | ||
b0e9a2fe XL |
4252 | static int sctp_setsockopt_reuse_port(struct sock *sk, char __user *optval, |
4253 | unsigned int optlen) | |
4254 | { | |
4255 | int val; | |
4256 | ||
4257 | if (!sctp_style(sk, TCP)) | |
4258 | return -EOPNOTSUPP; | |
4259 | ||
4260 | if (sctp_sk(sk)->ep->base.bind_addr.port) | |
4261 | return -EFAULT; | |
4262 | ||
4263 | if (optlen < sizeof(int)) | |
4264 | return -EINVAL; | |
4265 | ||
4266 | if (get_user(val, (int __user *)optval)) | |
4267 | return -EFAULT; | |
4268 | ||
4269 | sctp_sk(sk)->reuse = !!val; | |
4270 | ||
4271 | return 0; | |
4272 | } | |
4273 | ||
480ba9c1 XL |
4274 | static int sctp_setsockopt_event(struct sock *sk, char __user *optval, |
4275 | unsigned int optlen) | |
4276 | { | |
4277 | struct sctp_association *asoc; | |
4278 | struct sctp_ulpevent *event; | |
4279 | struct sctp_event param; | |
4280 | int retval = 0; | |
4281 | ||
4282 | if (optlen < sizeof(param)) { | |
4283 | retval = -EINVAL; | |
4284 | goto out; | |
4285 | } | |
4286 | ||
4287 | optlen = sizeof(param); | |
4288 | if (copy_from_user(¶m, optval, optlen)) { | |
4289 | retval = -EFAULT; | |
4290 | goto out; | |
4291 | } | |
4292 | ||
4293 | if (param.se_type < SCTP_SN_TYPE_BASE || | |
4294 | param.se_type > SCTP_SN_TYPE_MAX) { | |
4295 | retval = -EINVAL; | |
4296 | goto out; | |
4297 | } | |
4298 | ||
4299 | asoc = sctp_id2assoc(sk, param.se_assoc_id); | |
4300 | if (!asoc) { | |
4301 | sctp_ulpevent_type_set(&sctp_sk(sk)->subscribe, | |
4302 | param.se_type, param.se_on); | |
4303 | goto out; | |
4304 | } | |
4305 | ||
4306 | sctp_ulpevent_type_set(&asoc->subscribe, param.se_type, param.se_on); | |
4307 | ||
4308 | if (param.se_type == SCTP_SENDER_DRY_EVENT && param.se_on) { | |
4309 | if (sctp_outq_is_empty(&asoc->outqueue)) { | |
4310 | event = sctp_ulpevent_make_sender_dry_event(asoc, | |
4311 | GFP_USER | __GFP_NOWARN); | |
4312 | if (!event) { | |
4313 | retval = -ENOMEM; | |
4314 | goto out; | |
4315 | } | |
4316 | ||
4317 | asoc->stream.si->enqueue_event(&asoc->ulpq, event); | |
4318 | } | |
4319 | } | |
4320 | ||
4321 | out: | |
4322 | return retval; | |
4323 | } | |
4324 | ||
1da177e4 LT |
4325 | /* API 6.2 setsockopt(), getsockopt() |
4326 | * | |
4327 | * Applications use setsockopt() and getsockopt() to set or retrieve | |
4328 | * socket options. Socket options are used to change the default | |
4329 | * behavior of sockets calls. They are described in Section 7. | |
4330 | * | |
4331 | * The syntax is: | |
4332 | * | |
4333 | * ret = getsockopt(int sd, int level, int optname, void __user *optval, | |
4334 | * int __user *optlen); | |
4335 | * ret = setsockopt(int sd, int level, int optname, const void __user *optval, | |
4336 | * int optlen); | |
4337 | * | |
4338 | * sd - the socket descript. | |
4339 | * level - set to IPPROTO_SCTP for all SCTP options. | |
4340 | * optname - the option name. | |
4341 | * optval - the buffer to store the value of the option. | |
4342 | * optlen - the size of the buffer. | |
4343 | */ | |
dda91928 DB |
4344 | static int sctp_setsockopt(struct sock *sk, int level, int optname, |
4345 | char __user *optval, unsigned int optlen) | |
1da177e4 LT |
4346 | { |
4347 | int retval = 0; | |
4348 | ||
bb33381d | 4349 | pr_debug("%s: sk:%p, optname:%d\n", __func__, sk, optname); |
1da177e4 LT |
4350 | |
4351 | /* I can hardly begin to describe how wrong this is. This is | |
4352 | * so broken as to be worse than useless. The API draft | |
4353 | * REALLY is NOT helpful here... I am not convinced that the | |
4354 | * semantics of setsockopt() with a level OTHER THAN SOL_SCTP | |
4355 | * are at all well-founded. | |
4356 | */ | |
4357 | if (level != SOL_SCTP) { | |
4358 | struct sctp_af *af = sctp_sk(sk)->pf->af; | |
4359 | retval = af->setsockopt(sk, level, optname, optval, optlen); | |
4360 | goto out_nounlock; | |
4361 | } | |
4362 | ||
048ed4b6 | 4363 | lock_sock(sk); |
1da177e4 LT |
4364 | |
4365 | switch (optname) { | |
4366 | case SCTP_SOCKOPT_BINDX_ADD: | |
4367 | /* 'optlen' is the size of the addresses buffer. */ | |
4368 | retval = sctp_setsockopt_bindx(sk, (struct sockaddr __user *)optval, | |
4369 | optlen, SCTP_BINDX_ADD_ADDR); | |
4370 | break; | |
4371 | ||
4372 | case SCTP_SOCKOPT_BINDX_REM: | |
4373 | /* 'optlen' is the size of the addresses buffer. */ | |
4374 | retval = sctp_setsockopt_bindx(sk, (struct sockaddr __user *)optval, | |
4375 | optlen, SCTP_BINDX_REM_ADDR); | |
4376 | break; | |
4377 | ||
88a0a948 VY |
4378 | case SCTP_SOCKOPT_CONNECTX_OLD: |
4379 | /* 'optlen' is the size of the addresses buffer. */ | |
4380 | retval = sctp_setsockopt_connectx_old(sk, | |
4381 | (struct sockaddr __user *)optval, | |
4382 | optlen); | |
4383 | break; | |
4384 | ||
3f7a87d2 FF |
4385 | case SCTP_SOCKOPT_CONNECTX: |
4386 | /* 'optlen' is the size of the addresses buffer. */ | |
88a0a948 VY |
4387 | retval = sctp_setsockopt_connectx(sk, |
4388 | (struct sockaddr __user *)optval, | |
4389 | optlen); | |
3f7a87d2 FF |
4390 | break; |
4391 | ||
1da177e4 LT |
4392 | case SCTP_DISABLE_FRAGMENTS: |
4393 | retval = sctp_setsockopt_disable_fragments(sk, optval, optlen); | |
4394 | break; | |
4395 | ||
4396 | case SCTP_EVENTS: | |
4397 | retval = sctp_setsockopt_events(sk, optval, optlen); | |
4398 | break; | |
4399 | ||
4400 | case SCTP_AUTOCLOSE: | |
4401 | retval = sctp_setsockopt_autoclose(sk, optval, optlen); | |
4402 | break; | |
4403 | ||
4404 | case SCTP_PEER_ADDR_PARAMS: | |
4405 | retval = sctp_setsockopt_peer_addr_params(sk, optval, optlen); | |
4406 | break; | |
4407 | ||
4580ccc0 | 4408 | case SCTP_DELAYED_SACK: |
d364d927 | 4409 | retval = sctp_setsockopt_delayed_ack(sk, optval, optlen); |
7708610b | 4410 | break; |
d49d91d7 VY |
4411 | case SCTP_PARTIAL_DELIVERY_POINT: |
4412 | retval = sctp_setsockopt_partial_delivery_point(sk, optval, optlen); | |
4413 | break; | |
7708610b | 4414 | |
1da177e4 LT |
4415 | case SCTP_INITMSG: |
4416 | retval = sctp_setsockopt_initmsg(sk, optval, optlen); | |
4417 | break; | |
4418 | case SCTP_DEFAULT_SEND_PARAM: | |
4419 | retval = sctp_setsockopt_default_send_param(sk, optval, | |
4420 | optlen); | |
4421 | break; | |
6b3fd5f3 GOV |
4422 | case SCTP_DEFAULT_SNDINFO: |
4423 | retval = sctp_setsockopt_default_sndinfo(sk, optval, optlen); | |
4424 | break; | |
1da177e4 LT |
4425 | case SCTP_PRIMARY_ADDR: |
4426 | retval = sctp_setsockopt_primary_addr(sk, optval, optlen); | |
4427 | break; | |
4428 | case SCTP_SET_PEER_PRIMARY_ADDR: | |
4429 | retval = sctp_setsockopt_peer_primary_addr(sk, optval, optlen); | |
4430 | break; | |
4431 | case SCTP_NODELAY: | |
4432 | retval = sctp_setsockopt_nodelay(sk, optval, optlen); | |
4433 | break; | |
4434 | case SCTP_RTOINFO: | |
4435 | retval = sctp_setsockopt_rtoinfo(sk, optval, optlen); | |
4436 | break; | |
4437 | case SCTP_ASSOCINFO: | |
4438 | retval = sctp_setsockopt_associnfo(sk, optval, optlen); | |
4439 | break; | |
4440 | case SCTP_I_WANT_MAPPED_V4_ADDR: | |
4441 | retval = sctp_setsockopt_mappedv4(sk, optval, optlen); | |
4442 | break; | |
4443 | case SCTP_MAXSEG: | |
4444 | retval = sctp_setsockopt_maxseg(sk, optval, optlen); | |
4445 | break; | |
0f3fffd8 ISJ |
4446 | case SCTP_ADAPTATION_LAYER: |
4447 | retval = sctp_setsockopt_adaptation_layer(sk, optval, optlen); | |
1da177e4 | 4448 | break; |
6ab792f5 ISJ |
4449 | case SCTP_CONTEXT: |
4450 | retval = sctp_setsockopt_context(sk, optval, optlen); | |
4451 | break; | |
b6e1331f VY |
4452 | case SCTP_FRAGMENT_INTERLEAVE: |
4453 | retval = sctp_setsockopt_fragment_interleave(sk, optval, optlen); | |
4454 | break; | |
70331571 VY |
4455 | case SCTP_MAX_BURST: |
4456 | retval = sctp_setsockopt_maxburst(sk, optval, optlen); | |
4457 | break; | |
65b07e5d VY |
4458 | case SCTP_AUTH_CHUNK: |
4459 | retval = sctp_setsockopt_auth_chunk(sk, optval, optlen); | |
4460 | break; | |
4461 | case SCTP_HMAC_IDENT: | |
4462 | retval = sctp_setsockopt_hmac_ident(sk, optval, optlen); | |
4463 | break; | |
4464 | case SCTP_AUTH_KEY: | |
4465 | retval = sctp_setsockopt_auth_key(sk, optval, optlen); | |
4466 | break; | |
4467 | case SCTP_AUTH_ACTIVE_KEY: | |
4468 | retval = sctp_setsockopt_active_key(sk, optval, optlen); | |
4469 | break; | |
4470 | case SCTP_AUTH_DELETE_KEY: | |
4471 | retval = sctp_setsockopt_del_key(sk, optval, optlen); | |
4472 | break; | |
601590ec XL |
4473 | case SCTP_AUTH_DEACTIVATE_KEY: |
4474 | retval = sctp_setsockopt_deactivate_key(sk, optval, optlen); | |
4475 | break; | |
7dc04d71 MH |
4476 | case SCTP_AUTO_ASCONF: |
4477 | retval = sctp_setsockopt_auto_asconf(sk, optval, optlen); | |
4478 | break; | |
5aa93bcf NH |
4479 | case SCTP_PEER_ADDR_THLDS: |
4480 | retval = sctp_setsockopt_paddr_thresholds(sk, optval, optlen); | |
4481 | break; | |
0d3a421d GOV |
4482 | case SCTP_RECVRCVINFO: |
4483 | retval = sctp_setsockopt_recvrcvinfo(sk, optval, optlen); | |
4484 | break; | |
2347c80f GOV |
4485 | case SCTP_RECVNXTINFO: |
4486 | retval = sctp_setsockopt_recvnxtinfo(sk, optval, optlen); | |
4487 | break; | |
28aa4c26 XL |
4488 | case SCTP_PR_SUPPORTED: |
4489 | retval = sctp_setsockopt_pr_supported(sk, optval, optlen); | |
4490 | break; | |
f959fb44 XL |
4491 | case SCTP_DEFAULT_PRINFO: |
4492 | retval = sctp_setsockopt_default_prinfo(sk, optval, optlen); | |
4493 | break; | |
c0d8bab6 XL |
4494 | case SCTP_RECONFIG_SUPPORTED: |
4495 | retval = sctp_setsockopt_reconfig_supported(sk, optval, optlen); | |
4496 | break; | |
9fb657ae XL |
4497 | case SCTP_ENABLE_STREAM_RESET: |
4498 | retval = sctp_setsockopt_enable_strreset(sk, optval, optlen); | |
4499 | break; | |
7f9d68ac XL |
4500 | case SCTP_RESET_STREAMS: |
4501 | retval = sctp_setsockopt_reset_streams(sk, optval, optlen); | |
4502 | break; | |
a92ce1a4 XL |
4503 | case SCTP_RESET_ASSOC: |
4504 | retval = sctp_setsockopt_reset_assoc(sk, optval, optlen); | |
4505 | break; | |
242bd2d5 XL |
4506 | case SCTP_ADD_STREAMS: |
4507 | retval = sctp_setsockopt_add_streams(sk, optval, optlen); | |
4508 | break; | |
13aa8770 MRL |
4509 | case SCTP_STREAM_SCHEDULER: |
4510 | retval = sctp_setsockopt_scheduler(sk, optval, optlen); | |
4511 | break; | |
0ccdf3c7 MRL |
4512 | case SCTP_STREAM_SCHEDULER_VALUE: |
4513 | retval = sctp_setsockopt_scheduler_value(sk, optval, optlen); | |
4514 | break; | |
772a5869 XL |
4515 | case SCTP_INTERLEAVING_SUPPORTED: |
4516 | retval = sctp_setsockopt_interleaving_supported(sk, optval, | |
4517 | optlen); | |
4518 | break; | |
b0e9a2fe XL |
4519 | case SCTP_REUSE_PORT: |
4520 | retval = sctp_setsockopt_reuse_port(sk, optval, optlen); | |
4521 | break; | |
480ba9c1 XL |
4522 | case SCTP_EVENT: |
4523 | retval = sctp_setsockopt_event(sk, optval, optlen); | |
4524 | break; | |
1da177e4 LT |
4525 | default: |
4526 | retval = -ENOPROTOOPT; | |
4527 | break; | |
3ff50b79 | 4528 | } |
1da177e4 | 4529 | |
048ed4b6 | 4530 | release_sock(sk); |
1da177e4 LT |
4531 | |
4532 | out_nounlock: | |
4533 | return retval; | |
4534 | } | |
4535 | ||
4536 | /* API 3.1.6 connect() - UDP Style Syntax | |
4537 | * | |
4538 | * An application may use the connect() call in the UDP model to initiate an | |
4539 | * association without sending data. | |
4540 | * | |
4541 | * The syntax is: | |
4542 | * | |
4543 | * ret = connect(int sd, const struct sockaddr *nam, socklen_t len); | |
4544 | * | |
4545 | * sd: the socket descriptor to have a new association added to. | |
4546 | * | |
4547 | * nam: the address structure (either struct sockaddr_in or struct | |
4548 | * sockaddr_in6 defined in RFC2553 [7]). | |
4549 | * | |
4550 | * len: the size of the address. | |
4551 | */ | |
dda91928 | 4552 | static int sctp_connect(struct sock *sk, struct sockaddr *addr, |
644fbdea | 4553 | int addr_len, int flags) |
1da177e4 | 4554 | { |
644fbdea | 4555 | struct inet_sock *inet = inet_sk(sk); |
3f7a87d2 | 4556 | struct sctp_af *af; |
644fbdea | 4557 | int err = 0; |
1da177e4 | 4558 | |
048ed4b6 | 4559 | lock_sock(sk); |
1da177e4 | 4560 | |
bb33381d DB |
4561 | pr_debug("%s: sk:%p, sockaddr:%p, addr_len:%d\n", __func__, sk, |
4562 | addr, addr_len); | |
1da177e4 | 4563 | |
644fbdea XL |
4564 | /* We may need to bind the socket. */ |
4565 | if (!inet->inet_num) { | |
4566 | if (sk->sk_prot->get_port(sk, 0)) { | |
4567 | release_sock(sk); | |
4568 | return -EAGAIN; | |
4569 | } | |
4570 | inet->inet_sport = htons(inet->inet_num); | |
4571 | } | |
4572 | ||
3f7a87d2 FF |
4573 | /* Validate addr_len before calling common connect/connectx routine. */ |
4574 | af = sctp_get_af_specific(addr->sa_family); | |
4575 | if (!af || addr_len < af->sockaddr_len) { | |
4576 | err = -EINVAL; | |
4577 | } else { | |
4578 | /* Pass correct addr len to common routine (so it knows there | |
4579 | * is only one address being passed. | |
4580 | */ | |
644fbdea | 4581 | err = __sctp_connect(sk, addr, af->sockaddr_len, flags, NULL); |
1da177e4 LT |
4582 | } |
4583 | ||
048ed4b6 | 4584 | release_sock(sk); |
1da177e4 LT |
4585 | return err; |
4586 | } | |
4587 | ||
644fbdea XL |
4588 | int sctp_inet_connect(struct socket *sock, struct sockaddr *uaddr, |
4589 | int addr_len, int flags) | |
4590 | { | |
4591 | if (addr_len < sizeof(uaddr->sa_family)) | |
4592 | return -EINVAL; | |
4593 | ||
4594 | if (uaddr->sa_family == AF_UNSPEC) | |
4595 | return -EOPNOTSUPP; | |
4596 | ||
4597 | return sctp_connect(sock->sk, uaddr, addr_len, flags); | |
4598 | } | |
4599 | ||
1da177e4 | 4600 | /* FIXME: Write comments. */ |
dda91928 | 4601 | static int sctp_disconnect(struct sock *sk, int flags) |
1da177e4 LT |
4602 | { |
4603 | return -EOPNOTSUPP; /* STUB */ | |
4604 | } | |
4605 | ||
4606 | /* 4.1.4 accept() - TCP Style Syntax | |
4607 | * | |
4608 | * Applications use accept() call to remove an established SCTP | |
4609 | * association from the accept queue of the endpoint. A new socket | |
4610 | * descriptor will be returned from accept() to represent the newly | |
4611 | * formed association. | |
4612 | */ | |
cdfbabfb | 4613 | static struct sock *sctp_accept(struct sock *sk, int flags, int *err, bool kern) |
1da177e4 LT |
4614 | { |
4615 | struct sctp_sock *sp; | |
4616 | struct sctp_endpoint *ep; | |
4617 | struct sock *newsk = NULL; | |
4618 | struct sctp_association *asoc; | |
4619 | long timeo; | |
4620 | int error = 0; | |
4621 | ||
048ed4b6 | 4622 | lock_sock(sk); |
1da177e4 LT |
4623 | |
4624 | sp = sctp_sk(sk); | |
4625 | ep = sp->ep; | |
4626 | ||
4627 | if (!sctp_style(sk, TCP)) { | |
4628 | error = -EOPNOTSUPP; | |
4629 | goto out; | |
4630 | } | |
4631 | ||
4632 | if (!sctp_sstate(sk, LISTENING)) { | |
4633 | error = -EINVAL; | |
4634 | goto out; | |
4635 | } | |
4636 | ||
8abfedd8 | 4637 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
1da177e4 LT |
4638 | |
4639 | error = sctp_wait_for_accept(sk, timeo); | |
4640 | if (error) | |
4641 | goto out; | |
4642 | ||
4643 | /* We treat the list of associations on the endpoint as the accept | |
4644 | * queue and pick the first association on the list. | |
4645 | */ | |
4646 | asoc = list_entry(ep->asocs.next, struct sctp_association, asocs); | |
4647 | ||
cdfbabfb | 4648 | newsk = sp->pf->create_accept_sk(sk, asoc, kern); |
1da177e4 LT |
4649 | if (!newsk) { |
4650 | error = -ENOMEM; | |
4651 | goto out; | |
4652 | } | |
4653 | ||
4654 | /* Populate the fields of the newsk from the oldsk and migrate the | |
4655 | * asoc to the newsk. | |
4656 | */ | |
4657 | sctp_sock_migrate(sk, newsk, asoc, SCTP_SOCKET_TCP); | |
4658 | ||
4659 | out: | |
048ed4b6 | 4660 | release_sock(sk); |
d808ad9a | 4661 | *err = error; |
1da177e4 LT |
4662 | return newsk; |
4663 | } | |
4664 | ||
4665 | /* The SCTP ioctl handler. */ | |
dda91928 | 4666 | static int sctp_ioctl(struct sock *sk, int cmd, unsigned long arg) |
1da177e4 | 4667 | { |
65040c33 DEFP |
4668 | int rc = -ENOTCONN; |
4669 | ||
048ed4b6 | 4670 | lock_sock(sk); |
65040c33 DEFP |
4671 | |
4672 | /* | |
4673 | * SEQPACKET-style sockets in LISTENING state are valid, for | |
4674 | * SCTP, so only discard TCP-style sockets in LISTENING state. | |
4675 | */ | |
4676 | if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING)) | |
4677 | goto out; | |
4678 | ||
4679 | switch (cmd) { | |
4680 | case SIOCINQ: { | |
4681 | struct sk_buff *skb; | |
4682 | unsigned int amount = 0; | |
4683 | ||
4684 | skb = skb_peek(&sk->sk_receive_queue); | |
4685 | if (skb != NULL) { | |
4686 | /* | |
4687 | * We will only return the amount of this packet since | |
4688 | * that is all that will be read. | |
4689 | */ | |
4690 | amount = skb->len; | |
4691 | } | |
4692 | rc = put_user(amount, (int __user *)arg); | |
65040c33 | 4693 | break; |
9a7241c2 | 4694 | } |
65040c33 DEFP |
4695 | default: |
4696 | rc = -ENOIOCTLCMD; | |
4697 | break; | |
4698 | } | |
4699 | out: | |
048ed4b6 | 4700 | release_sock(sk); |
65040c33 | 4701 | return rc; |
1da177e4 LT |
4702 | } |
4703 | ||
4704 | /* This is the function which gets called during socket creation to | |
4705 | * initialized the SCTP-specific portion of the sock. | |
4706 | * The sock structure should already be zero-filled memory. | |
4707 | */ | |
dda91928 | 4708 | static int sctp_init_sock(struct sock *sk) |
1da177e4 | 4709 | { |
e1fc3b14 | 4710 | struct net *net = sock_net(sk); |
1da177e4 LT |
4711 | struct sctp_sock *sp; |
4712 | ||
bb33381d | 4713 | pr_debug("%s: sk:%p\n", __func__, sk); |
1da177e4 LT |
4714 | |
4715 | sp = sctp_sk(sk); | |
4716 | ||
4717 | /* Initialize the SCTP per socket area. */ | |
4718 | switch (sk->sk_type) { | |
4719 | case SOCK_SEQPACKET: | |
4720 | sp->type = SCTP_SOCKET_UDP; | |
4721 | break; | |
4722 | case SOCK_STREAM: | |
4723 | sp->type = SCTP_SOCKET_TCP; | |
4724 | break; | |
4725 | default: | |
4726 | return -ESOCKTNOSUPPORT; | |
4727 | } | |
4728 | ||
90017acc MRL |
4729 | sk->sk_gso_type = SKB_GSO_SCTP; |
4730 | ||
1da177e4 LT |
4731 | /* Initialize default send parameters. These parameters can be |
4732 | * modified with the SCTP_DEFAULT_SEND_PARAM socket option. | |
4733 | */ | |
4734 | sp->default_stream = 0; | |
4735 | sp->default_ppid = 0; | |
4736 | sp->default_flags = 0; | |
4737 | sp->default_context = 0; | |
4738 | sp->default_timetolive = 0; | |
4739 | ||
6ab792f5 | 4740 | sp->default_rcv_context = 0; |
e1fc3b14 | 4741 | sp->max_burst = net->sctp.max_burst; |
6ab792f5 | 4742 | |
3c68198e NH |
4743 | sp->sctp_hmac_alg = net->sctp.sctp_hmac_alg; |
4744 | ||
1da177e4 LT |
4745 | /* Initialize default setup parameters. These parameters |
4746 | * can be modified with the SCTP_INITMSG socket option or | |
4747 | * overridden by the SCTP_INIT CMSG. | |
4748 | */ | |
4749 | sp->initmsg.sinit_num_ostreams = sctp_max_outstreams; | |
4750 | sp->initmsg.sinit_max_instreams = sctp_max_instreams; | |
e1fc3b14 EB |
4751 | sp->initmsg.sinit_max_attempts = net->sctp.max_retrans_init; |
4752 | sp->initmsg.sinit_max_init_timeo = net->sctp.rto_max; | |
1da177e4 LT |
4753 | |
4754 | /* Initialize default RTO related parameters. These parameters can | |
4755 | * be modified for with the SCTP_RTOINFO socket option. | |
4756 | */ | |
e1fc3b14 EB |
4757 | sp->rtoinfo.srto_initial = net->sctp.rto_initial; |
4758 | sp->rtoinfo.srto_max = net->sctp.rto_max; | |
4759 | sp->rtoinfo.srto_min = net->sctp.rto_min; | |
1da177e4 LT |
4760 | |
4761 | /* Initialize default association related parameters. These parameters | |
4762 | * can be modified with the SCTP_ASSOCINFO socket option. | |
4763 | */ | |
e1fc3b14 | 4764 | sp->assocparams.sasoc_asocmaxrxt = net->sctp.max_retrans_association; |
1da177e4 LT |
4765 | sp->assocparams.sasoc_number_peer_destinations = 0; |
4766 | sp->assocparams.sasoc_peer_rwnd = 0; | |
4767 | sp->assocparams.sasoc_local_rwnd = 0; | |
e1fc3b14 | 4768 | sp->assocparams.sasoc_cookie_life = net->sctp.valid_cookie_life; |
1da177e4 LT |
4769 | |
4770 | /* Initialize default event subscriptions. By default, all the | |
d808ad9a | 4771 | * options are off. |
1da177e4 | 4772 | */ |
2cc0eeb6 | 4773 | sp->subscribe = 0; |
1da177e4 LT |
4774 | |
4775 | /* Default Peer Address Parameters. These defaults can | |
4776 | * be modified via SCTP_PEER_ADDR_PARAMS | |
4777 | */ | |
e1fc3b14 EB |
4778 | sp->hbinterval = net->sctp.hb_interval; |
4779 | sp->pathmaxrxt = net->sctp.max_retrans_path; | |
4e2d52bf | 4780 | sp->pathmtu = 0; /* allow default discovery */ |
e1fc3b14 | 4781 | sp->sackdelay = net->sctp.sack_timeout; |
7bfe8bdb | 4782 | sp->sackfreq = 2; |
52ccb8e9 | 4783 | sp->param_flags = SPP_HB_ENABLE | |
d808ad9a YH |
4784 | SPP_PMTUD_ENABLE | |
4785 | SPP_SACKDELAY_ENABLE; | |
1da177e4 LT |
4786 | |
4787 | /* If enabled no SCTP message fragmentation will be performed. | |
4788 | * Configure through SCTP_DISABLE_FRAGMENTS socket option. | |
4789 | */ | |
4790 | sp->disable_fragments = 0; | |
4791 | ||
208edef6 SS |
4792 | /* Enable Nagle algorithm by default. */ |
4793 | sp->nodelay = 0; | |
1da177e4 | 4794 | |
0d3a421d | 4795 | sp->recvrcvinfo = 0; |
2347c80f | 4796 | sp->recvnxtinfo = 0; |
0d3a421d | 4797 | |
1da177e4 LT |
4798 | /* Enable by default. */ |
4799 | sp->v4mapped = 1; | |
4800 | ||
4801 | /* Auto-close idle associations after the configured | |
4802 | * number of seconds. A value of 0 disables this | |
4803 | * feature. Configure through the SCTP_AUTOCLOSE socket option, | |
4804 | * for UDP-style sockets only. | |
4805 | */ | |
4806 | sp->autoclose = 0; | |
4807 | ||
4808 | /* User specified fragmentation limit. */ | |
4809 | sp->user_frag = 0; | |
4810 | ||
0f3fffd8 | 4811 | sp->adaptation_ind = 0; |
1da177e4 LT |
4812 | |
4813 | sp->pf = sctp_get_pf_specific(sk->sk_family); | |
4814 | ||
4815 | /* Control variables for partial data delivery. */ | |
b6e1331f | 4816 | atomic_set(&sp->pd_mode, 0); |
1da177e4 | 4817 | skb_queue_head_init(&sp->pd_lobby); |
b6e1331f | 4818 | sp->frag_interleave = 0; |
1da177e4 LT |
4819 | |
4820 | /* Create a per socket endpoint structure. Even if we | |
4821 | * change the data structure relationships, this may still | |
4822 | * be useful for storing pre-connect address information. | |
4823 | */ | |
c164b838 DB |
4824 | sp->ep = sctp_endpoint_new(sk, GFP_KERNEL); |
4825 | if (!sp->ep) | |
1da177e4 LT |
4826 | return -ENOMEM; |
4827 | ||
1da177e4 LT |
4828 | sp->hmac = NULL; |
4829 | ||
0a2fbac1 DB |
4830 | sk->sk_destruct = sctp_destruct_sock; |
4831 | ||
1da177e4 | 4832 | SCTP_DBG_OBJCNT_INC(sock); |
6f756a8c DM |
4833 | |
4834 | local_bh_disable(); | |
8cb38a60 | 4835 | sk_sockets_allocated_inc(sk); |
e1fc3b14 | 4836 | sock_prot_inuse_add(net, sk->sk_prot, 1); |
2d45a02d MRL |
4837 | |
4838 | /* Nothing can fail after this block, otherwise | |
4839 | * sctp_destroy_sock() will be called without addr_wq_lock held | |
4840 | */ | |
e1fc3b14 | 4841 | if (net->sctp.default_auto_asconf) { |
2d45a02d | 4842 | spin_lock(&sock_net(sk)->sctp.addr_wq_lock); |
9f7d653b | 4843 | list_add_tail(&sp->auto_asconf_list, |
e1fc3b14 | 4844 | &net->sctp.auto_asconf_splist); |
9f7d653b | 4845 | sp->do_auto_asconf = 1; |
2d45a02d MRL |
4846 | spin_unlock(&sock_net(sk)->sctp.addr_wq_lock); |
4847 | } else { | |
9f7d653b | 4848 | sp->do_auto_asconf = 0; |
2d45a02d MRL |
4849 | } |
4850 | ||
6f756a8c DM |
4851 | local_bh_enable(); |
4852 | ||
1da177e4 LT |
4853 | return 0; |
4854 | } | |
4855 | ||
2d45a02d MRL |
4856 | /* Cleanup any SCTP per socket resources. Must be called with |
4857 | * sock_net(sk)->sctp.addr_wq_lock held if sp->do_auto_asconf is true | |
4858 | */ | |
dda91928 | 4859 | static void sctp_destroy_sock(struct sock *sk) |
1da177e4 | 4860 | { |
9f7d653b | 4861 | struct sctp_sock *sp; |
1da177e4 | 4862 | |
bb33381d | 4863 | pr_debug("%s: sk:%p\n", __func__, sk); |
1da177e4 LT |
4864 | |
4865 | /* Release our hold on the endpoint. */ | |
9f7d653b | 4866 | sp = sctp_sk(sk); |
1abd165e DB |
4867 | /* This could happen during socket init, thus we bail out |
4868 | * early, since the rest of the below is not setup either. | |
4869 | */ | |
4870 | if (sp->ep == NULL) | |
4871 | return; | |
4872 | ||
9f7d653b MH |
4873 | if (sp->do_auto_asconf) { |
4874 | sp->do_auto_asconf = 0; | |
4875 | list_del(&sp->auto_asconf_list); | |
4876 | } | |
4877 | sctp_endpoint_free(sp->ep); | |
5bc0b3bf | 4878 | local_bh_disable(); |
8cb38a60 | 4879 | sk_sockets_allocated_dec(sk); |
9a57f7fa | 4880 | sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); |
5bc0b3bf | 4881 | local_bh_enable(); |
1da177e4 LT |
4882 | } |
4883 | ||
0a2fbac1 DB |
4884 | /* Triggered when there are no references on the socket anymore */ |
4885 | static void sctp_destruct_sock(struct sock *sk) | |
4886 | { | |
4887 | struct sctp_sock *sp = sctp_sk(sk); | |
4888 | ||
4889 | /* Free up the HMAC transform. */ | |
5821c769 | 4890 | crypto_free_shash(sp->hmac); |
0a2fbac1 DB |
4891 | |
4892 | inet_sock_destruct(sk); | |
4893 | } | |
4894 | ||
1da177e4 LT |
4895 | /* API 4.1.7 shutdown() - TCP Style Syntax |
4896 | * int shutdown(int socket, int how); | |
4897 | * | |
4898 | * sd - the socket descriptor of the association to be closed. | |
4899 | * how - Specifies the type of shutdown. The values are | |
4900 | * as follows: | |
4901 | * SHUT_RD | |
4902 | * Disables further receive operations. No SCTP | |
4903 | * protocol action is taken. | |
4904 | * SHUT_WR | |
4905 | * Disables further send operations, and initiates | |
4906 | * the SCTP shutdown sequence. | |
4907 | * SHUT_RDWR | |
4908 | * Disables further send and receive operations | |
4909 | * and initiates the SCTP shutdown sequence. | |
4910 | */ | |
dda91928 | 4911 | static void sctp_shutdown(struct sock *sk, int how) |
1da177e4 | 4912 | { |
55e26eb9 | 4913 | struct net *net = sock_net(sk); |
1da177e4 | 4914 | struct sctp_endpoint *ep; |
1da177e4 LT |
4915 | |
4916 | if (!sctp_style(sk, TCP)) | |
4917 | return; | |
4918 | ||
5bf35ddf XL |
4919 | ep = sctp_sk(sk)->ep; |
4920 | if (how & SEND_SHUTDOWN && !list_empty(&ep->asocs)) { | |
4921 | struct sctp_association *asoc; | |
4922 | ||
cbabf463 | 4923 | inet_sk_set_state(sk, SCTP_SS_CLOSING); |
5bf35ddf XL |
4924 | asoc = list_entry(ep->asocs.next, |
4925 | struct sctp_association, asocs); | |
4926 | sctp_primitive_SHUTDOWN(net, asoc, NULL); | |
1da177e4 LT |
4927 | } |
4928 | } | |
4929 | ||
52c52a61 XL |
4930 | int sctp_get_sctp_info(struct sock *sk, struct sctp_association *asoc, |
4931 | struct sctp_info *info) | |
4932 | { | |
4933 | struct sctp_transport *prim; | |
4934 | struct list_head *pos; | |
4935 | int mask; | |
4936 | ||
4937 | memset(info, 0, sizeof(*info)); | |
4938 | if (!asoc) { | |
4939 | struct sctp_sock *sp = sctp_sk(sk); | |
4940 | ||
4941 | info->sctpi_s_autoclose = sp->autoclose; | |
4942 | info->sctpi_s_adaptation_ind = sp->adaptation_ind; | |
4943 | info->sctpi_s_pd_point = sp->pd_point; | |
4944 | info->sctpi_s_nodelay = sp->nodelay; | |
4945 | info->sctpi_s_disable_fragments = sp->disable_fragments; | |
4946 | info->sctpi_s_v4mapped = sp->v4mapped; | |
4947 | info->sctpi_s_frag_interleave = sp->frag_interleave; | |
40eb90e9 | 4948 | info->sctpi_s_type = sp->type; |
52c52a61 XL |
4949 | |
4950 | return 0; | |
4951 | } | |
4952 | ||
4953 | info->sctpi_tag = asoc->c.my_vtag; | |
4954 | info->sctpi_state = asoc->state; | |
4955 | info->sctpi_rwnd = asoc->a_rwnd; | |
4956 | info->sctpi_unackdata = asoc->unack_data; | |
4957 | info->sctpi_penddata = sctp_tsnmap_pending(&asoc->peer.tsn_map); | |
cee360ab XL |
4958 | info->sctpi_instrms = asoc->stream.incnt; |
4959 | info->sctpi_outstrms = asoc->stream.outcnt; | |
52c52a61 XL |
4960 | list_for_each(pos, &asoc->base.inqueue.in_chunk_list) |
4961 | info->sctpi_inqueue++; | |
4962 | list_for_each(pos, &asoc->outqueue.out_chunk_list) | |
4963 | info->sctpi_outqueue++; | |
4964 | info->sctpi_overall_error = asoc->overall_error_count; | |
4965 | info->sctpi_max_burst = asoc->max_burst; | |
4966 | info->sctpi_maxseg = asoc->frag_point; | |
4967 | info->sctpi_peer_rwnd = asoc->peer.rwnd; | |
4968 | info->sctpi_peer_tag = asoc->c.peer_vtag; | |
4969 | ||
4970 | mask = asoc->peer.ecn_capable << 1; | |
4971 | mask = (mask | asoc->peer.ipv4_address) << 1; | |
4972 | mask = (mask | asoc->peer.ipv6_address) << 1; | |
4973 | mask = (mask | asoc->peer.hostname_address) << 1; | |
4974 | mask = (mask | asoc->peer.asconf_capable) << 1; | |
4975 | mask = (mask | asoc->peer.prsctp_capable) << 1; | |
4976 | mask = (mask | asoc->peer.auth_capable); | |
4977 | info->sctpi_peer_capable = mask; | |
4978 | mask = asoc->peer.sack_needed << 1; | |
4979 | mask = (mask | asoc->peer.sack_generation) << 1; | |
4980 | mask = (mask | asoc->peer.zero_window_announced); | |
4981 | info->sctpi_peer_sack = mask; | |
4982 | ||
4983 | info->sctpi_isacks = asoc->stats.isacks; | |
4984 | info->sctpi_osacks = asoc->stats.osacks; | |
4985 | info->sctpi_opackets = asoc->stats.opackets; | |
4986 | info->sctpi_ipackets = asoc->stats.ipackets; | |
4987 | info->sctpi_rtxchunks = asoc->stats.rtxchunks; | |
4988 | info->sctpi_outofseqtsns = asoc->stats.outofseqtsns; | |
4989 | info->sctpi_idupchunks = asoc->stats.idupchunks; | |
4990 | info->sctpi_gapcnt = asoc->stats.gapcnt; | |
4991 | info->sctpi_ouodchunks = asoc->stats.ouodchunks; | |
4992 | info->sctpi_iuodchunks = asoc->stats.iuodchunks; | |
4993 | info->sctpi_oodchunks = asoc->stats.oodchunks; | |
4994 | info->sctpi_iodchunks = asoc->stats.iodchunks; | |
4995 | info->sctpi_octrlchunks = asoc->stats.octrlchunks; | |
4996 | info->sctpi_ictrlchunks = asoc->stats.ictrlchunks; | |
4997 | ||
4998 | prim = asoc->peer.primary_path; | |
ee6c88bb | 4999 | memcpy(&info->sctpi_p_address, &prim->ipaddr, sizeof(prim->ipaddr)); |
52c52a61 XL |
5000 | info->sctpi_p_state = prim->state; |
5001 | info->sctpi_p_cwnd = prim->cwnd; | |
5002 | info->sctpi_p_srtt = prim->srtt; | |
5003 | info->sctpi_p_rto = jiffies_to_msecs(prim->rto); | |
5004 | info->sctpi_p_hbinterval = prim->hbinterval; | |
5005 | info->sctpi_p_pathmaxrxt = prim->pathmaxrxt; | |
5006 | info->sctpi_p_sackdelay = jiffies_to_msecs(prim->sackdelay); | |
5007 | info->sctpi_p_ssthresh = prim->ssthresh; | |
5008 | info->sctpi_p_partial_bytes_acked = prim->partial_bytes_acked; | |
5009 | info->sctpi_p_flight_size = prim->flight_size; | |
5010 | info->sctpi_p_error = prim->error_count; | |
5011 | ||
5012 | return 0; | |
5013 | } | |
5014 | EXPORT_SYMBOL_GPL(sctp_get_sctp_info); | |
5015 | ||
626d16f5 | 5016 | /* use callback to avoid exporting the core structure */ |
97a6ec4a | 5017 | void sctp_transport_walk_start(struct rhashtable_iter *iter) |
626d16f5 | 5018 | { |
7fda702f | 5019 | rhltable_walk_enter(&sctp_transport_hashtable, iter); |
626d16f5 | 5020 | |
97a6ec4a | 5021 | rhashtable_walk_start(iter); |
626d16f5 XL |
5022 | } |
5023 | ||
5024 | void sctp_transport_walk_stop(struct rhashtable_iter *iter) | |
5025 | { | |
5026 | rhashtable_walk_stop(iter); | |
5027 | rhashtable_walk_exit(iter); | |
5028 | } | |
5029 | ||
5030 | struct sctp_transport *sctp_transport_get_next(struct net *net, | |
5031 | struct rhashtable_iter *iter) | |
5032 | { | |
5033 | struct sctp_transport *t; | |
5034 | ||
5035 | t = rhashtable_walk_next(iter); | |
5036 | for (; t; t = rhashtable_walk_next(iter)) { | |
5037 | if (IS_ERR(t)) { | |
5038 | if (PTR_ERR(t) == -EAGAIN) | |
5039 | continue; | |
5040 | break; | |
5041 | } | |
5042 | ||
bab1be79 XL |
5043 | if (!sctp_transport_hold(t)) |
5044 | continue; | |
5045 | ||
626d16f5 XL |
5046 | if (net_eq(sock_net(t->asoc->base.sk), net) && |
5047 | t->asoc->peer.primary_path == t) | |
5048 | break; | |
bab1be79 XL |
5049 | |
5050 | sctp_transport_put(t); | |
626d16f5 XL |
5051 | } |
5052 | ||
5053 | return t; | |
5054 | } | |
5055 | ||
5056 | struct sctp_transport *sctp_transport_get_idx(struct net *net, | |
5057 | struct rhashtable_iter *iter, | |
5058 | int pos) | |
5059 | { | |
bab1be79 | 5060 | struct sctp_transport *t; |
626d16f5 | 5061 | |
bab1be79 XL |
5062 | if (!pos) |
5063 | return SEQ_START_TOKEN; | |
626d16f5 | 5064 | |
bab1be79 XL |
5065 | while ((t = sctp_transport_get_next(net, iter)) && !IS_ERR(t)) { |
5066 | if (!--pos) | |
5067 | break; | |
5068 | sctp_transport_put(t); | |
5069 | } | |
5070 | ||
5071 | return t; | |
626d16f5 XL |
5072 | } |
5073 | ||
5074 | int sctp_for_each_endpoint(int (*cb)(struct sctp_endpoint *, void *), | |
5075 | void *p) { | |
5076 | int err = 0; | |
5077 | int hash = 0; | |
5078 | struct sctp_ep_common *epb; | |
5079 | struct sctp_hashbucket *head; | |
5080 | ||
5081 | for (head = sctp_ep_hashtable; hash < sctp_ep_hashsize; | |
5082 | hash++, head++) { | |
581409da | 5083 | read_lock_bh(&head->lock); |
626d16f5 XL |
5084 | sctp_for_each_hentry(epb, &head->chain) { |
5085 | err = cb(sctp_ep(epb), p); | |
5086 | if (err) | |
5087 | break; | |
5088 | } | |
581409da | 5089 | read_unlock_bh(&head->lock); |
626d16f5 XL |
5090 | } |
5091 | ||
5092 | return err; | |
5093 | } | |
5094 | EXPORT_SYMBOL_GPL(sctp_for_each_endpoint); | |
5095 | ||
5096 | int sctp_transport_lookup_process(int (*cb)(struct sctp_transport *, void *), | |
5097 | struct net *net, | |
5098 | const union sctp_addr *laddr, | |
5099 | const union sctp_addr *paddr, void *p) | |
5100 | { | |
5101 | struct sctp_transport *transport; | |
08abb795 | 5102 | int err; |
626d16f5 XL |
5103 | |
5104 | rcu_read_lock(); | |
5105 | transport = sctp_addrs_lookup_transport(net, laddr, paddr); | |
08abb795 | 5106 | rcu_read_unlock(); |
7fda702f | 5107 | if (!transport) |
08abb795 | 5108 | return -ENOENT; |
1cceda78 | 5109 | |
1cceda78 | 5110 | err = cb(transport, p); |
cd26da4f | 5111 | sctp_transport_put(transport); |
1cceda78 | 5112 | |
626d16f5 XL |
5113 | return err; |
5114 | } | |
5115 | EXPORT_SYMBOL_GPL(sctp_transport_lookup_process); | |
5116 | ||
5117 | int sctp_for_each_transport(int (*cb)(struct sctp_transport *, void *), | |
d25adbeb XL |
5118 | int (*cb_done)(struct sctp_transport *, void *), |
5119 | struct net *net, int *pos, void *p) { | |
626d16f5 | 5120 | struct rhashtable_iter hti; |
d25adbeb XL |
5121 | struct sctp_transport *tsp; |
5122 | int ret; | |
626d16f5 | 5123 | |
d25adbeb | 5124 | again: |
f53d77e1 | 5125 | ret = 0; |
97a6ec4a | 5126 | sctp_transport_walk_start(&hti); |
626d16f5 | 5127 | |
d25adbeb XL |
5128 | tsp = sctp_transport_get_idx(net, &hti, *pos + 1); |
5129 | for (; !IS_ERR_OR_NULL(tsp); tsp = sctp_transport_get_next(net, &hti)) { | |
d25adbeb XL |
5130 | ret = cb(tsp, p); |
5131 | if (ret) | |
626d16f5 | 5132 | break; |
d25adbeb XL |
5133 | (*pos)++; |
5134 | sctp_transport_put(tsp); | |
626d16f5 | 5135 | } |
626d16f5 | 5136 | sctp_transport_walk_stop(&hti); |
53fa1036 | 5137 | |
d25adbeb XL |
5138 | if (ret) { |
5139 | if (cb_done && !cb_done(tsp, p)) { | |
5140 | (*pos)++; | |
5141 | sctp_transport_put(tsp); | |
5142 | goto again; | |
5143 | } | |
5144 | sctp_transport_put(tsp); | |
5145 | } | |
5146 | ||
5147 | return ret; | |
626d16f5 XL |
5148 | } |
5149 | EXPORT_SYMBOL_GPL(sctp_for_each_transport); | |
5150 | ||
1da177e4 LT |
5151 | /* 7.2.1 Association Status (SCTP_STATUS) |
5152 | ||
5153 | * Applications can retrieve current status information about an | |
5154 | * association, including association state, peer receiver window size, | |
5155 | * number of unacked data chunks, and number of data chunks pending | |
5156 | * receipt. This information is read-only. | |
5157 | */ | |
5158 | static int sctp_getsockopt_sctp_status(struct sock *sk, int len, | |
5159 | char __user *optval, | |
5160 | int __user *optlen) | |
5161 | { | |
5162 | struct sctp_status status; | |
5163 | struct sctp_association *asoc = NULL; | |
5164 | struct sctp_transport *transport; | |
5165 | sctp_assoc_t associd; | |
5166 | int retval = 0; | |
5167 | ||
408f22e8 | 5168 | if (len < sizeof(status)) { |
1da177e4 LT |
5169 | retval = -EINVAL; |
5170 | goto out; | |
5171 | } | |
5172 | ||
408f22e8 NH |
5173 | len = sizeof(status); |
5174 | if (copy_from_user(&status, optval, len)) { | |
1da177e4 LT |
5175 | retval = -EFAULT; |
5176 | goto out; | |
5177 | } | |
5178 | ||
5179 | associd = status.sstat_assoc_id; | |
5180 | asoc = sctp_id2assoc(sk, associd); | |
5181 | if (!asoc) { | |
5182 | retval = -EINVAL; | |
5183 | goto out; | |
5184 | } | |
5185 | ||
5186 | transport = asoc->peer.primary_path; | |
5187 | ||
5188 | status.sstat_assoc_id = sctp_assoc2id(asoc); | |
38ab1fa9 | 5189 | status.sstat_state = sctp_assoc_to_state(asoc); |
1da177e4 LT |
5190 | status.sstat_rwnd = asoc->peer.rwnd; |
5191 | status.sstat_unackdata = asoc->unack_data; | |
5192 | ||
5193 | status.sstat_penddata = sctp_tsnmap_pending(&asoc->peer.tsn_map); | |
cee360ab XL |
5194 | status.sstat_instrms = asoc->stream.incnt; |
5195 | status.sstat_outstrms = asoc->stream.outcnt; | |
1da177e4 LT |
5196 | status.sstat_fragmentation_point = asoc->frag_point; |
5197 | status.sstat_primary.spinfo_assoc_id = sctp_assoc2id(transport->asoc); | |
8cec6b80 AV |
5198 | memcpy(&status.sstat_primary.spinfo_address, &transport->ipaddr, |
5199 | transport->af_specific->sockaddr_len); | |
1da177e4 | 5200 | /* Map ipv4 address into v4-mapped-on-v6 address. */ |
299ee123 | 5201 | sctp_get_pf_specific(sk->sk_family)->addr_to_user(sctp_sk(sk), |
1da177e4 | 5202 | (union sctp_addr *)&status.sstat_primary.spinfo_address); |
3f7a87d2 | 5203 | status.sstat_primary.spinfo_state = transport->state; |
1da177e4 LT |
5204 | status.sstat_primary.spinfo_cwnd = transport->cwnd; |
5205 | status.sstat_primary.spinfo_srtt = transport->srtt; | |
5206 | status.sstat_primary.spinfo_rto = jiffies_to_msecs(transport->rto); | |
52ccb8e9 | 5207 | status.sstat_primary.spinfo_mtu = transport->pathmtu; |
1da177e4 | 5208 | |
3f7a87d2 FF |
5209 | if (status.sstat_primary.spinfo_state == SCTP_UNKNOWN) |
5210 | status.sstat_primary.spinfo_state = SCTP_ACTIVE; | |
5211 | ||
1da177e4 LT |
5212 | if (put_user(len, optlen)) { |
5213 | retval = -EFAULT; | |
5214 | goto out; | |
5215 | } | |
5216 | ||
bb33381d DB |
5217 | pr_debug("%s: len:%d, state:%d, rwnd:%d, assoc_id:%d\n", |
5218 | __func__, len, status.sstat_state, status.sstat_rwnd, | |
5219 | status.sstat_assoc_id); | |
1da177e4 LT |
5220 | |
5221 | if (copy_to_user(optval, &status, len)) { | |
5222 | retval = -EFAULT; | |
5223 | goto out; | |
5224 | } | |
5225 | ||
5226 | out: | |
a02cec21 | 5227 | return retval; |
1da177e4 LT |
5228 | } |
5229 | ||
5230 | ||
5231 | /* 7.2.2 Peer Address Information (SCTP_GET_PEER_ADDR_INFO) | |
5232 | * | |
5233 | * Applications can retrieve information about a specific peer address | |
5234 | * of an association, including its reachability state, congestion | |
5235 | * window, and retransmission timer values. This information is | |
5236 | * read-only. | |
5237 | */ | |
5238 | static int sctp_getsockopt_peer_addr_info(struct sock *sk, int len, | |
5239 | char __user *optval, | |
5240 | int __user *optlen) | |
5241 | { | |
5242 | struct sctp_paddrinfo pinfo; | |
5243 | struct sctp_transport *transport; | |
5244 | int retval = 0; | |
5245 | ||
408f22e8 | 5246 | if (len < sizeof(pinfo)) { |
1da177e4 LT |
5247 | retval = -EINVAL; |
5248 | goto out; | |
5249 | } | |
5250 | ||
408f22e8 NH |
5251 | len = sizeof(pinfo); |
5252 | if (copy_from_user(&pinfo, optval, len)) { | |
1da177e4 LT |
5253 | retval = -EFAULT; |
5254 | goto out; | |
5255 | } | |
5256 | ||
5257 | transport = sctp_addr_id2transport(sk, &pinfo.spinfo_address, | |
5258 | pinfo.spinfo_assoc_id); | |
5259 | if (!transport) | |
5260 | return -EINVAL; | |
5261 | ||
5262 | pinfo.spinfo_assoc_id = sctp_assoc2id(transport->asoc); | |
3f7a87d2 | 5263 | pinfo.spinfo_state = transport->state; |
1da177e4 LT |
5264 | pinfo.spinfo_cwnd = transport->cwnd; |
5265 | pinfo.spinfo_srtt = transport->srtt; | |
5266 | pinfo.spinfo_rto = jiffies_to_msecs(transport->rto); | |
52ccb8e9 | 5267 | pinfo.spinfo_mtu = transport->pathmtu; |
1da177e4 | 5268 | |
3f7a87d2 FF |
5269 | if (pinfo.spinfo_state == SCTP_UNKNOWN) |
5270 | pinfo.spinfo_state = SCTP_ACTIVE; | |
5271 | ||
1da177e4 LT |
5272 | if (put_user(len, optlen)) { |
5273 | retval = -EFAULT; | |
5274 | goto out; | |
5275 | } | |
5276 | ||
5277 | if (copy_to_user(optval, &pinfo, len)) { | |
5278 | retval = -EFAULT; | |
5279 | goto out; | |
5280 | } | |
5281 | ||
5282 | out: | |
a02cec21 | 5283 | return retval; |
1da177e4 LT |
5284 | } |
5285 | ||
5286 | /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS) | |
5287 | * | |
5288 | * This option is a on/off flag. If enabled no SCTP message | |
5289 | * fragmentation will be performed. Instead if a message being sent | |
5290 | * exceeds the current PMTU size, the message will NOT be sent and | |
5291 | * instead a error will be indicated to the user. | |
5292 | */ | |
5293 | static int sctp_getsockopt_disable_fragments(struct sock *sk, int len, | |
5294 | char __user *optval, int __user *optlen) | |
5295 | { | |
5296 | int val; | |
5297 | ||
5298 | if (len < sizeof(int)) | |
5299 | return -EINVAL; | |
5300 | ||
5301 | len = sizeof(int); | |
5302 | val = (sctp_sk(sk)->disable_fragments == 1); | |
5303 | if (put_user(len, optlen)) | |
5304 | return -EFAULT; | |
5305 | if (copy_to_user(optval, &val, len)) | |
5306 | return -EFAULT; | |
5307 | return 0; | |
5308 | } | |
5309 | ||
5310 | /* 7.1.15 Set notification and ancillary events (SCTP_EVENTS) | |
5311 | * | |
5312 | * This socket option is used to specify various notifications and | |
5313 | * ancillary data the user wishes to receive. | |
5314 | */ | |
5315 | static int sctp_getsockopt_events(struct sock *sk, int len, char __user *optval, | |
5316 | int __user *optlen) | |
5317 | { | |
2cc0eeb6 XL |
5318 | struct sctp_event_subscribe subscribe; |
5319 | __u8 *sn_type = (__u8 *)&subscribe; | |
5320 | int i; | |
5321 | ||
a4b8e71b | 5322 | if (len == 0) |
1da177e4 | 5323 | return -EINVAL; |
acdd5985 TG |
5324 | if (len > sizeof(struct sctp_event_subscribe)) |
5325 | len = sizeof(struct sctp_event_subscribe); | |
408f22e8 NH |
5326 | if (put_user(len, optlen)) |
5327 | return -EFAULT; | |
2cc0eeb6 XL |
5328 | |
5329 | for (i = 0; i < len; i++) | |
5330 | sn_type[i] = sctp_ulpevent_type_enabled(sctp_sk(sk)->subscribe, | |
5331 | SCTP_SN_TYPE_BASE + i); | |
5332 | ||
5333 | if (copy_to_user(optval, &subscribe, len)) | |
1da177e4 | 5334 | return -EFAULT; |
2cc0eeb6 | 5335 | |
1da177e4 LT |
5336 | return 0; |
5337 | } | |
5338 | ||
5339 | /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE) | |
5340 | * | |
5341 | * This socket option is applicable to the UDP-style socket only. When | |
5342 | * set it will cause associations that are idle for more than the | |
5343 | * specified number of seconds to automatically close. An association | |
5344 | * being idle is defined an association that has NOT sent or received | |
5345 | * user data. The special value of '0' indicates that no automatic | |
5346 | * close of any associations should be performed. The option expects an | |
5347 | * integer defining the number of seconds of idle time before an | |
5348 | * association is closed. | |
5349 | */ | |
5350 | static int sctp_getsockopt_autoclose(struct sock *sk, int len, char __user *optval, int __user *optlen) | |
5351 | { | |
5352 | /* Applicable to UDP-style socket only */ | |
5353 | if (sctp_style(sk, TCP)) | |
5354 | return -EOPNOTSUPP; | |
408f22e8 | 5355 | if (len < sizeof(int)) |
1da177e4 | 5356 | return -EINVAL; |
408f22e8 NH |
5357 | len = sizeof(int); |
5358 | if (put_user(len, optlen)) | |
5359 | return -EFAULT; | |
b2ce04c2 | 5360 | if (put_user(sctp_sk(sk)->autoclose, (int __user *)optval)) |
1da177e4 LT |
5361 | return -EFAULT; |
5362 | return 0; | |
5363 | } | |
5364 | ||
5365 | /* Helper routine to branch off an association to a new socket. */ | |
0343c554 | 5366 | int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp) |
1da177e4 | 5367 | { |
0343c554 | 5368 | struct sctp_association *asoc = sctp_id2assoc(sk, id); |
299ee123 | 5369 | struct sctp_sock *sp = sctp_sk(sk); |
1da177e4 LT |
5370 | struct socket *sock; |
5371 | int err = 0; | |
5372 | ||
df80cd9b XL |
5373 | /* Do not peel off from one netns to another one. */ |
5374 | if (!net_eq(current->nsproxy->net_ns, sock_net(sk))) | |
5375 | return -EINVAL; | |
5376 | ||
0343c554 BP |
5377 | if (!asoc) |
5378 | return -EINVAL; | |
5379 | ||
1da177e4 LT |
5380 | /* An association cannot be branched off from an already peeled-off |
5381 | * socket, nor is this supported for tcp style sockets. | |
5382 | */ | |
5383 | if (!sctp_style(sk, UDP)) | |
5384 | return -EINVAL; | |
5385 | ||
5386 | /* Create a new socket. */ | |
5387 | err = sock_create(sk->sk_family, SOCK_SEQPACKET, IPPROTO_SCTP, &sock); | |
5388 | if (err < 0) | |
5389 | return err; | |
5390 | ||
914e1c8b | 5391 | sctp_copy_sock(sock->sk, sk, asoc); |
4f444308 VY |
5392 | |
5393 | /* Make peeled-off sockets more like 1-1 accepted sockets. | |
b7e10c25 RH |
5394 | * Set the daddr and initialize id to something more random and also |
5395 | * copy over any ip options. | |
4f444308 | 5396 | */ |
299ee123 | 5397 | sp->pf->to_sk_daddr(&asoc->peer.primary_addr, sk); |
b7e10c25 | 5398 | sp->pf->copy_ip_options(sk, sock->sk); |
914e1c8b VY |
5399 | |
5400 | /* Populate the fields of the newsk from the oldsk and migrate the | |
5401 | * asoc to the newsk. | |
5402 | */ | |
5403 | sctp_sock_migrate(sk, sock->sk, asoc, SCTP_SOCKET_UDP_HIGH_BANDWIDTH); | |
4f444308 | 5404 | |
1da177e4 LT |
5405 | *sockp = sock; |
5406 | ||
5407 | return err; | |
5408 | } | |
0343c554 | 5409 | EXPORT_SYMBOL(sctp_do_peeloff); |
1da177e4 | 5410 | |
2cb5c8e3 NH |
5411 | static int sctp_getsockopt_peeloff_common(struct sock *sk, sctp_peeloff_arg_t *peeloff, |
5412 | struct file **newfile, unsigned flags) | |
5413 | { | |
5414 | struct socket *newsock; | |
5415 | int retval; | |
5416 | ||
5417 | retval = sctp_do_peeloff(sk, peeloff->associd, &newsock); | |
5418 | if (retval < 0) | |
5419 | goto out; | |
5420 | ||
5421 | /* Map the socket to an unused fd that can be returned to the user. */ | |
5422 | retval = get_unused_fd_flags(flags & SOCK_CLOEXEC); | |
5423 | if (retval < 0) { | |
5424 | sock_release(newsock); | |
5425 | goto out; | |
5426 | } | |
5427 | ||
5428 | *newfile = sock_alloc_file(newsock, 0, NULL); | |
5429 | if (IS_ERR(*newfile)) { | |
5430 | put_unused_fd(retval); | |
2cb5c8e3 NH |
5431 | retval = PTR_ERR(*newfile); |
5432 | *newfile = NULL; | |
5433 | return retval; | |
5434 | } | |
5435 | ||
5436 | pr_debug("%s: sk:%p, newsk:%p, sd:%d\n", __func__, sk, newsock->sk, | |
5437 | retval); | |
5438 | ||
5439 | peeloff->sd = retval; | |
5440 | ||
5441 | if (flags & SOCK_NONBLOCK) | |
5442 | (*newfile)->f_flags |= O_NONBLOCK; | |
5443 | out: | |
5444 | return retval; | |
5445 | } | |
5446 | ||
1da177e4 LT |
5447 | static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval, int __user *optlen) |
5448 | { | |
5449 | sctp_peeloff_arg_t peeloff; | |
2cb5c8e3 | 5450 | struct file *newfile = NULL; |
1da177e4 | 5451 | int retval = 0; |
1da177e4 | 5452 | |
408f22e8 | 5453 | if (len < sizeof(sctp_peeloff_arg_t)) |
1da177e4 | 5454 | return -EINVAL; |
408f22e8 | 5455 | len = sizeof(sctp_peeloff_arg_t); |
1da177e4 LT |
5456 | if (copy_from_user(&peeloff, optval, len)) |
5457 | return -EFAULT; | |
5458 | ||
2cb5c8e3 | 5459 | retval = sctp_getsockopt_peeloff_common(sk, &peeloff, &newfile, 0); |
1da177e4 LT |
5460 | if (retval < 0) |
5461 | goto out; | |
5462 | ||
2cb5c8e3 NH |
5463 | /* Return the fd mapped to the new socket. */ |
5464 | if (put_user(len, optlen)) { | |
5465 | fput(newfile); | |
5466 | put_unused_fd(retval); | |
5467 | return -EFAULT; | |
1da177e4 LT |
5468 | } |
5469 | ||
2cb5c8e3 NH |
5470 | if (copy_to_user(optval, &peeloff, len)) { |
5471 | fput(newfile); | |
56b31d1c | 5472 | put_unused_fd(retval); |
2cb5c8e3 | 5473 | return -EFAULT; |
56b31d1c | 5474 | } |
2cb5c8e3 NH |
5475 | fd_install(retval, newfile); |
5476 | out: | |
5477 | return retval; | |
5478 | } | |
56b31d1c | 5479 | |
2cb5c8e3 NH |
5480 | static int sctp_getsockopt_peeloff_flags(struct sock *sk, int len, |
5481 | char __user *optval, int __user *optlen) | |
5482 | { | |
5483 | sctp_peeloff_flags_arg_t peeloff; | |
5484 | struct file *newfile = NULL; | |
5485 | int retval = 0; | |
5486 | ||
5487 | if (len < sizeof(sctp_peeloff_flags_arg_t)) | |
5488 | return -EINVAL; | |
5489 | len = sizeof(sctp_peeloff_flags_arg_t); | |
5490 | if (copy_from_user(&peeloff, optval, len)) | |
5491 | return -EFAULT; | |
5492 | ||
5493 | retval = sctp_getsockopt_peeloff_common(sk, &peeloff.p_arg, | |
5494 | &newfile, peeloff.flags); | |
5495 | if (retval < 0) | |
5496 | goto out; | |
1da177e4 LT |
5497 | |
5498 | /* Return the fd mapped to the new socket. */ | |
56b31d1c AV |
5499 | if (put_user(len, optlen)) { |
5500 | fput(newfile); | |
5501 | put_unused_fd(retval); | |
5502 | return -EFAULT; | |
5503 | } | |
2cb5c8e3 | 5504 | |
56b31d1c AV |
5505 | if (copy_to_user(optval, &peeloff, len)) { |
5506 | fput(newfile); | |
5507 | put_unused_fd(retval); | |
408f22e8 | 5508 | return -EFAULT; |
56b31d1c AV |
5509 | } |
5510 | fd_install(retval, newfile); | |
1da177e4 LT |
5511 | out: |
5512 | return retval; | |
5513 | } | |
5514 | ||
5515 | /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS) | |
5516 | * | |
5517 | * Applications can enable or disable heartbeats for any peer address of | |
5518 | * an association, modify an address's heartbeat interval, force a | |
5519 | * heartbeat to be sent immediately, and adjust the address's maximum | |
5520 | * number of retransmissions sent before an address is considered | |
5521 | * unreachable. The following structure is used to access and modify an | |
5522 | * address's parameters: | |
5523 | * | |
5524 | * struct sctp_paddrparams { | |
52ccb8e9 FF |
5525 | * sctp_assoc_t spp_assoc_id; |
5526 | * struct sockaddr_storage spp_address; | |
5527 | * uint32_t spp_hbinterval; | |
5528 | * uint16_t spp_pathmaxrxt; | |
5529 | * uint32_t spp_pathmtu; | |
5530 | * uint32_t spp_sackdelay; | |
5531 | * uint32_t spp_flags; | |
5532 | * }; | |
5533 | * | |
5534 | * spp_assoc_id - (one-to-many style socket) This is filled in the | |
5535 | * application, and identifies the association for | |
5536 | * this query. | |
1da177e4 LT |
5537 | * spp_address - This specifies which address is of interest. |
5538 | * spp_hbinterval - This contains the value of the heartbeat interval, | |
52ccb8e9 FF |
5539 | * in milliseconds. If a value of zero |
5540 | * is present in this field then no changes are to | |
5541 | * be made to this parameter. | |
1da177e4 LT |
5542 | * spp_pathmaxrxt - This contains the maximum number of |
5543 | * retransmissions before this address shall be | |
52ccb8e9 FF |
5544 | * considered unreachable. If a value of zero |
5545 | * is present in this field then no changes are to | |
5546 | * be made to this parameter. | |
5547 | * spp_pathmtu - When Path MTU discovery is disabled the value | |
5548 | * specified here will be the "fixed" path mtu. | |
5549 | * Note that if the spp_address field is empty | |
5550 | * then all associations on this address will | |
5551 | * have this fixed path mtu set upon them. | |
5552 | * | |
5553 | * spp_sackdelay - When delayed sack is enabled, this value specifies | |
5554 | * the number of milliseconds that sacks will be delayed | |
5555 | * for. This value will apply to all addresses of an | |
5556 | * association if the spp_address field is empty. Note | |
5557 | * also, that if delayed sack is enabled and this | |
5558 | * value is set to 0, no change is made to the last | |
5559 | * recorded delayed sack timer value. | |
5560 | * | |
5561 | * spp_flags - These flags are used to control various features | |
5562 | * on an association. The flag field may contain | |
5563 | * zero or more of the following options. | |
5564 | * | |
5565 | * SPP_HB_ENABLE - Enable heartbeats on the | |
5566 | * specified address. Note that if the address | |
5567 | * field is empty all addresses for the association | |
5568 | * have heartbeats enabled upon them. | |
5569 | * | |
5570 | * SPP_HB_DISABLE - Disable heartbeats on the | |
5571 | * speicifed address. Note that if the address | |
5572 | * field is empty all addresses for the association | |
5573 | * will have their heartbeats disabled. Note also | |
5574 | * that SPP_HB_ENABLE and SPP_HB_DISABLE are | |
5575 | * mutually exclusive, only one of these two should | |
5576 | * be specified. Enabling both fields will have | |
5577 | * undetermined results. | |
5578 | * | |
5579 | * SPP_HB_DEMAND - Request a user initiated heartbeat | |
5580 | * to be made immediately. | |
5581 | * | |
5582 | * SPP_PMTUD_ENABLE - This field will enable PMTU | |
5583 | * discovery upon the specified address. Note that | |
5584 | * if the address feild is empty then all addresses | |
5585 | * on the association are effected. | |
5586 | * | |
5587 | * SPP_PMTUD_DISABLE - This field will disable PMTU | |
5588 | * discovery upon the specified address. Note that | |
5589 | * if the address feild is empty then all addresses | |
5590 | * on the association are effected. Not also that | |
5591 | * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually | |
5592 | * exclusive. Enabling both will have undetermined | |
5593 | * results. | |
5594 | * | |
5595 | * SPP_SACKDELAY_ENABLE - Setting this flag turns | |
5596 | * on delayed sack. The time specified in spp_sackdelay | |
5597 | * is used to specify the sack delay for this address. Note | |
5598 | * that if spp_address is empty then all addresses will | |
5599 | * enable delayed sack and take on the sack delay | |
5600 | * value specified in spp_sackdelay. | |
5601 | * SPP_SACKDELAY_DISABLE - Setting this flag turns | |
5602 | * off delayed sack. If the spp_address field is blank then | |
5603 | * delayed sack is disabled for the entire association. Note | |
5604 | * also that this field is mutually exclusive to | |
5605 | * SPP_SACKDELAY_ENABLE, setting both will have undefined | |
5606 | * results. | |
0b0dce7a XL |
5607 | * |
5608 | * SPP_IPV6_FLOWLABEL: Setting this flag enables the | |
5609 | * setting of the IPV6 flow label value. The value is | |
5610 | * contained in the spp_ipv6_flowlabel field. | |
5611 | * Upon retrieval, this flag will be set to indicate that | |
5612 | * the spp_ipv6_flowlabel field has a valid value returned. | |
5613 | * If a specific destination address is set (in the | |
5614 | * spp_address field), then the value returned is that of | |
5615 | * the address. If just an association is specified (and | |
5616 | * no address), then the association's default flow label | |
5617 | * is returned. If neither an association nor a destination | |
5618 | * is specified, then the socket's default flow label is | |
5619 | * returned. For non-IPv6 sockets, this flag will be left | |
5620 | * cleared. | |
5621 | * | |
5622 | * SPP_DSCP: Setting this flag enables the setting of the | |
5623 | * Differentiated Services Code Point (DSCP) value | |
5624 | * associated with either the association or a specific | |
5625 | * address. The value is obtained in the spp_dscp field. | |
5626 | * Upon retrieval, this flag will be set to indicate that | |
5627 | * the spp_dscp field has a valid value returned. If a | |
5628 | * specific destination address is set when called (in the | |
5629 | * spp_address field), then that specific destination | |
5630 | * address's DSCP value is returned. If just an association | |
5631 | * is specified, then the association's default DSCP is | |
5632 | * returned. If neither an association nor a destination is | |
5633 | * specified, then the socket's default DSCP is returned. | |
5634 | * | |
5635 | * spp_ipv6_flowlabel | |
5636 | * - This field is used in conjunction with the | |
5637 | * SPP_IPV6_FLOWLABEL flag and contains the IPv6 flow label. | |
5638 | * The 20 least significant bits are used for the flow | |
5639 | * label. This setting has precedence over any IPv6-layer | |
5640 | * setting. | |
5641 | * | |
5642 | * spp_dscp - This field is used in conjunction with the SPP_DSCP flag | |
5643 | * and contains the DSCP. The 6 most significant bits are | |
5644 | * used for the DSCP. This setting has precedence over any | |
5645 | * IPv4- or IPv6- layer setting. | |
1da177e4 LT |
5646 | */ |
5647 | static int sctp_getsockopt_peer_addr_params(struct sock *sk, int len, | |
52ccb8e9 | 5648 | char __user *optval, int __user *optlen) |
1da177e4 | 5649 | { |
52ccb8e9 FF |
5650 | struct sctp_paddrparams params; |
5651 | struct sctp_transport *trans = NULL; | |
5652 | struct sctp_association *asoc = NULL; | |
5653 | struct sctp_sock *sp = sctp_sk(sk); | |
1da177e4 | 5654 | |
0b0dce7a XL |
5655 | if (len >= sizeof(params)) |
5656 | len = sizeof(params); | |
5657 | else if (len >= ALIGN(offsetof(struct sctp_paddrparams, | |
5658 | spp_ipv6_flowlabel), 4)) | |
5659 | len = ALIGN(offsetof(struct sctp_paddrparams, | |
5660 | spp_ipv6_flowlabel), 4); | |
5661 | else | |
1da177e4 | 5662 | return -EINVAL; |
0b0dce7a | 5663 | |
1da177e4 LT |
5664 | if (copy_from_user(¶ms, optval, len)) |
5665 | return -EFAULT; | |
5666 | ||
52ccb8e9 FF |
5667 | /* If an address other than INADDR_ANY is specified, and |
5668 | * no transport is found, then the request is invalid. | |
1da177e4 | 5669 | */ |
cb3f837b | 5670 | if (!sctp_is_any(sk, (union sctp_addr *)¶ms.spp_address)) { |
52ccb8e9 FF |
5671 | trans = sctp_addr_id2transport(sk, ¶ms.spp_address, |
5672 | params.spp_assoc_id); | |
5673 | if (!trans) { | |
bb33381d | 5674 | pr_debug("%s: failed no transport\n", __func__); |
52ccb8e9 FF |
5675 | return -EINVAL; |
5676 | } | |
1da177e4 LT |
5677 | } |
5678 | ||
52ccb8e9 FF |
5679 | /* Get association, if assoc_id != 0 and the socket is a one |
5680 | * to many style socket, and an association was not found, then | |
5681 | * the id was invalid. | |
5682 | */ | |
5683 | asoc = sctp_id2assoc(sk, params.spp_assoc_id); | |
5684 | if (!asoc && params.spp_assoc_id && sctp_style(sk, UDP)) { | |
bb33381d | 5685 | pr_debug("%s: failed no association\n", __func__); |
1da177e4 | 5686 | return -EINVAL; |
52ccb8e9 | 5687 | } |
1da177e4 | 5688 | |
52ccb8e9 FF |
5689 | if (trans) { |
5690 | /* Fetch transport values. */ | |
5691 | params.spp_hbinterval = jiffies_to_msecs(trans->hbinterval); | |
5692 | params.spp_pathmtu = trans->pathmtu; | |
5693 | params.spp_pathmaxrxt = trans->pathmaxrxt; | |
5694 | params.spp_sackdelay = jiffies_to_msecs(trans->sackdelay); | |
5695 | ||
5696 | /*draft-11 doesn't say what to return in spp_flags*/ | |
5697 | params.spp_flags = trans->param_flags; | |
0b0dce7a XL |
5698 | if (trans->flowlabel & SCTP_FLOWLABEL_SET_MASK) { |
5699 | params.spp_ipv6_flowlabel = trans->flowlabel & | |
5700 | SCTP_FLOWLABEL_VAL_MASK; | |
5701 | params.spp_flags |= SPP_IPV6_FLOWLABEL; | |
5702 | } | |
5703 | if (trans->dscp & SCTP_DSCP_SET_MASK) { | |
5704 | params.spp_dscp = trans->dscp & SCTP_DSCP_VAL_MASK; | |
5705 | params.spp_flags |= SPP_DSCP; | |
5706 | } | |
52ccb8e9 FF |
5707 | } else if (asoc) { |
5708 | /* Fetch association values. */ | |
5709 | params.spp_hbinterval = jiffies_to_msecs(asoc->hbinterval); | |
5710 | params.spp_pathmtu = asoc->pathmtu; | |
5711 | params.spp_pathmaxrxt = asoc->pathmaxrxt; | |
5712 | params.spp_sackdelay = jiffies_to_msecs(asoc->sackdelay); | |
5713 | ||
5714 | /*draft-11 doesn't say what to return in spp_flags*/ | |
5715 | params.spp_flags = asoc->param_flags; | |
0b0dce7a XL |
5716 | if (asoc->flowlabel & SCTP_FLOWLABEL_SET_MASK) { |
5717 | params.spp_ipv6_flowlabel = asoc->flowlabel & | |
5718 | SCTP_FLOWLABEL_VAL_MASK; | |
5719 | params.spp_flags |= SPP_IPV6_FLOWLABEL; | |
5720 | } | |
5721 | if (asoc->dscp & SCTP_DSCP_SET_MASK) { | |
5722 | params.spp_dscp = asoc->dscp & SCTP_DSCP_VAL_MASK; | |
5723 | params.spp_flags |= SPP_DSCP; | |
5724 | } | |
52ccb8e9 FF |
5725 | } else { |
5726 | /* Fetch socket values. */ | |
5727 | params.spp_hbinterval = sp->hbinterval; | |
5728 | params.spp_pathmtu = sp->pathmtu; | |
5729 | params.spp_sackdelay = sp->sackdelay; | |
5730 | params.spp_pathmaxrxt = sp->pathmaxrxt; | |
1da177e4 | 5731 | |
52ccb8e9 FF |
5732 | /*draft-11 doesn't say what to return in spp_flags*/ |
5733 | params.spp_flags = sp->param_flags; | |
0b0dce7a XL |
5734 | if (sp->flowlabel & SCTP_FLOWLABEL_SET_MASK) { |
5735 | params.spp_ipv6_flowlabel = sp->flowlabel & | |
5736 | SCTP_FLOWLABEL_VAL_MASK; | |
5737 | params.spp_flags |= SPP_IPV6_FLOWLABEL; | |
5738 | } | |
5739 | if (sp->dscp & SCTP_DSCP_SET_MASK) { | |
5740 | params.spp_dscp = sp->dscp & SCTP_DSCP_VAL_MASK; | |
5741 | params.spp_flags |= SPP_DSCP; | |
5742 | } | |
52ccb8e9 | 5743 | } |
1da177e4 | 5744 | |
1da177e4 LT |
5745 | if (copy_to_user(optval, ¶ms, len)) |
5746 | return -EFAULT; | |
5747 | ||
5748 | if (put_user(len, optlen)) | |
5749 | return -EFAULT; | |
5750 | ||
5751 | return 0; | |
5752 | } | |
5753 | ||
d364d927 WY |
5754 | /* |
5755 | * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK) | |
5756 | * | |
5757 | * This option will effect the way delayed acks are performed. This | |
5758 | * option allows you to get or set the delayed ack time, in | |
5759 | * milliseconds. It also allows changing the delayed ack frequency. | |
5760 | * Changing the frequency to 1 disables the delayed sack algorithm. If | |
5761 | * the assoc_id is 0, then this sets or gets the endpoints default | |
5762 | * values. If the assoc_id field is non-zero, then the set or get | |
5763 | * effects the specified association for the one to many model (the | |
5764 | * assoc_id field is ignored by the one to one model). Note that if | |
5765 | * sack_delay or sack_freq are 0 when setting this option, then the | |
5766 | * current values will remain unchanged. | |
5767 | * | |
5768 | * struct sctp_sack_info { | |
5769 | * sctp_assoc_t sack_assoc_id; | |
5770 | * uint32_t sack_delay; | |
5771 | * uint32_t sack_freq; | |
5772 | * }; | |
7708610b | 5773 | * |
d364d927 WY |
5774 | * sack_assoc_id - This parameter, indicates which association the user |
5775 | * is performing an action upon. Note that if this field's value is | |
5776 | * zero then the endpoints default value is changed (effecting future | |
5777 | * associations only). | |
7708610b | 5778 | * |
d364d927 WY |
5779 | * sack_delay - This parameter contains the number of milliseconds that |
5780 | * the user is requesting the delayed ACK timer be set to. Note that | |
5781 | * this value is defined in the standard to be between 200 and 500 | |
5782 | * milliseconds. | |
7708610b | 5783 | * |
d364d927 WY |
5784 | * sack_freq - This parameter contains the number of packets that must |
5785 | * be received before a sack is sent without waiting for the delay | |
5786 | * timer to expire. The default value for this is 2, setting this | |
5787 | * value to 1 will disable the delayed sack algorithm. | |
7708610b | 5788 | */ |
d364d927 | 5789 | static int sctp_getsockopt_delayed_ack(struct sock *sk, int len, |
7708610b FF |
5790 | char __user *optval, |
5791 | int __user *optlen) | |
5792 | { | |
d364d927 | 5793 | struct sctp_sack_info params; |
7708610b FF |
5794 | struct sctp_association *asoc = NULL; |
5795 | struct sctp_sock *sp = sctp_sk(sk); | |
5796 | ||
d364d927 WY |
5797 | if (len >= sizeof(struct sctp_sack_info)) { |
5798 | len = sizeof(struct sctp_sack_info); | |
7708610b | 5799 | |
d364d927 WY |
5800 | if (copy_from_user(¶ms, optval, len)) |
5801 | return -EFAULT; | |
5802 | } else if (len == sizeof(struct sctp_assoc_value)) { | |
94f65193 | 5803 | pr_warn_ratelimited(DEPRECATED |
f916ec96 | 5804 | "%s (pid %d) " |
94f65193 | 5805 | "Use of struct sctp_assoc_value in delayed_ack socket option.\n" |
f916ec96 NH |
5806 | "Use struct sctp_sack_info instead\n", |
5807 | current->comm, task_pid_nr(current)); | |
d364d927 WY |
5808 | if (copy_from_user(¶ms, optval, len)) |
5809 | return -EFAULT; | |
5810 | } else | |
cb3f837b | 5811 | return -EINVAL; |
7708610b | 5812 | |
d364d927 | 5813 | /* Get association, if sack_assoc_id != 0 and the socket is a one |
7708610b FF |
5814 | * to many style socket, and an association was not found, then |
5815 | * the id was invalid. | |
d808ad9a | 5816 | */ |
d364d927 WY |
5817 | asoc = sctp_id2assoc(sk, params.sack_assoc_id); |
5818 | if (!asoc && params.sack_assoc_id && sctp_style(sk, UDP)) | |
7708610b FF |
5819 | return -EINVAL; |
5820 | ||
5821 | if (asoc) { | |
5822 | /* Fetch association values. */ | |
d364d927 WY |
5823 | if (asoc->param_flags & SPP_SACKDELAY_ENABLE) { |
5824 | params.sack_delay = jiffies_to_msecs( | |
7708610b | 5825 | asoc->sackdelay); |
d364d927 WY |
5826 | params.sack_freq = asoc->sackfreq; |
5827 | ||
5828 | } else { | |
5829 | params.sack_delay = 0; | |
5830 | params.sack_freq = 1; | |
5831 | } | |
7708610b FF |
5832 | } else { |
5833 | /* Fetch socket values. */ | |
d364d927 WY |
5834 | if (sp->param_flags & SPP_SACKDELAY_ENABLE) { |
5835 | params.sack_delay = sp->sackdelay; | |
5836 | params.sack_freq = sp->sackfreq; | |
5837 | } else { | |
5838 | params.sack_delay = 0; | |
5839 | params.sack_freq = 1; | |
5840 | } | |
7708610b FF |
5841 | } |
5842 | ||
5843 | if (copy_to_user(optval, ¶ms, len)) | |
5844 | return -EFAULT; | |
5845 | ||
5846 | if (put_user(len, optlen)) | |
5847 | return -EFAULT; | |
5848 | ||
5849 | return 0; | |
5850 | } | |
5851 | ||
1da177e4 LT |
5852 | /* 7.1.3 Initialization Parameters (SCTP_INITMSG) |
5853 | * | |
5854 | * Applications can specify protocol parameters for the default association | |
5855 | * initialization. The option name argument to setsockopt() and getsockopt() | |
5856 | * is SCTP_INITMSG. | |
5857 | * | |
5858 | * Setting initialization parameters is effective only on an unconnected | |
5859 | * socket (for UDP-style sockets only future associations are effected | |
5860 | * by the change). With TCP-style sockets, this option is inherited by | |
5861 | * sockets derived from a listener socket. | |
5862 | */ | |
5863 | static int sctp_getsockopt_initmsg(struct sock *sk, int len, char __user *optval, int __user *optlen) | |
5864 | { | |
408f22e8 | 5865 | if (len < sizeof(struct sctp_initmsg)) |
1da177e4 | 5866 | return -EINVAL; |
408f22e8 NH |
5867 | len = sizeof(struct sctp_initmsg); |
5868 | if (put_user(len, optlen)) | |
5869 | return -EFAULT; | |
1da177e4 LT |
5870 | if (copy_to_user(optval, &sctp_sk(sk)->initmsg, len)) |
5871 | return -EFAULT; | |
5872 | return 0; | |
5873 | } | |
5874 | ||