Commit | Line | Data |
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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 | |
31 | * along with GNU CC; see the file COPYING. If not, write to | |
32 | * the Free Software Foundation, 59 Temple Place - Suite 330, | |
33 | * Boston, MA 02111-1307, USA. | |
34 | * | |
35 | * Please send any bug reports or fixes you make to the | |
36 | * email address(es): | |
37 | * lksctp developers <lksctp-developers@lists.sourceforge.net> | |
38 | * | |
39 | * Or submit a bug report through the following website: | |
40 | * http://www.sf.net/projects/lksctp | |
41 | * | |
42 | * Written or modified by: | |
43 | * La Monte H.P. Yarroll <piggy@acm.org> | |
44 | * Narasimha Budihal <narsi@refcode.org> | |
45 | * Karl Knutson <karl@athena.chicago.il.us> | |
46 | * Jon Grimm <jgrimm@us.ibm.com> | |
47 | * Xingang Guo <xingang.guo@intel.com> | |
48 | * Daisy Chang <daisyc@us.ibm.com> | |
49 | * Sridhar Samudrala <samudrala@us.ibm.com> | |
50 | * Inaky Perez-Gonzalez <inaky.gonzalez@intel.com> | |
51 | * Ardelle Fan <ardelle.fan@intel.com> | |
52 | * Ryan Layer <rmlayer@us.ibm.com> | |
53 | * Anup Pemmaiah <pemmaiah@cc.usu.edu> | |
54 | * Kevin Gao <kevin.gao@intel.com> | |
55 | * | |
56 | * Any bugs reported given to us we will try to fix... any fixes shared will | |
57 | * be incorporated into the next SCTP release. | |
58 | */ | |
59 | ||
1da177e4 LT |
60 | #include <linux/types.h> |
61 | #include <linux/kernel.h> | |
62 | #include <linux/wait.h> | |
63 | #include <linux/time.h> | |
64 | #include <linux/ip.h> | |
4fc268d2 | 65 | #include <linux/capability.h> |
1da177e4 LT |
66 | #include <linux/fcntl.h> |
67 | #include <linux/poll.h> | |
68 | #include <linux/init.h> | |
69 | #include <linux/crypto.h> | |
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> | |
76 | ||
77 | #include <linux/socket.h> /* for sa_family_t */ | |
78 | #include <net/sock.h> | |
79 | #include <net/sctp/sctp.h> | |
80 | #include <net/sctp/sm.h> | |
81 | ||
82 | /* WARNING: Please do not remove the SCTP_STATIC attribute to | |
83 | * any of the functions below as they are used to export functions | |
84 | * used by a project regression testsuite. | |
85 | */ | |
86 | ||
87 | /* Forward declarations for internal helper functions. */ | |
88 | static int sctp_writeable(struct sock *sk); | |
89 | static void sctp_wfree(struct sk_buff *skb); | |
90 | static int sctp_wait_for_sndbuf(struct sctp_association *, long *timeo_p, | |
91 | size_t msg_len); | |
92 | static int sctp_wait_for_packet(struct sock * sk, int *err, long *timeo_p); | |
93 | static int sctp_wait_for_connect(struct sctp_association *, long *timeo_p); | |
94 | static int sctp_wait_for_accept(struct sock *sk, long timeo); | |
95 | static void sctp_wait_for_close(struct sock *sk, long timeo); | |
96 | static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt, | |
97 | union sctp_addr *addr, int len); | |
98 | static int sctp_bindx_add(struct sock *, struct sockaddr *, int); | |
99 | static int sctp_bindx_rem(struct sock *, struct sockaddr *, int); | |
100 | static int sctp_send_asconf_add_ip(struct sock *, struct sockaddr *, int); | |
101 | static int sctp_send_asconf_del_ip(struct sock *, struct sockaddr *, int); | |
102 | static int sctp_send_asconf(struct sctp_association *asoc, | |
103 | struct sctp_chunk *chunk); | |
104 | static int sctp_do_bind(struct sock *, union sctp_addr *, int); | |
105 | static int sctp_autobind(struct sock *sk); | |
106 | static void sctp_sock_migrate(struct sock *, struct sock *, | |
107 | struct sctp_association *, sctp_socket_type_t); | |
108 | static char *sctp_hmac_alg = SCTP_COOKIE_HMAC_ALG; | |
109 | ||
4d93df0a NH |
110 | extern struct kmem_cache *sctp_bucket_cachep; |
111 | extern int sysctl_sctp_mem[3]; | |
112 | extern int sysctl_sctp_rmem[3]; | |
113 | extern int sysctl_sctp_wmem[3]; | |
114 | ||
b6fa1a4d AB |
115 | static int sctp_memory_pressure; |
116 | static atomic_t sctp_memory_allocated; | |
117 | static atomic_t sctp_sockets_allocated; | |
4d93df0a | 118 | |
5c52ba17 | 119 | static void sctp_enter_memory_pressure(struct sock *sk) |
4d93df0a NH |
120 | { |
121 | sctp_memory_pressure = 1; | |
122 | } | |
123 | ||
124 | ||
1da177e4 LT |
125 | /* Get the sndbuf space available at the time on the association. */ |
126 | static inline int sctp_wspace(struct sctp_association *asoc) | |
127 | { | |
4d93df0a | 128 | int amt; |
1da177e4 | 129 | |
4d93df0a NH |
130 | if (asoc->ep->sndbuf_policy) |
131 | amt = asoc->sndbuf_used; | |
132 | else | |
133 | amt = atomic_read(&asoc->base.sk->sk_wmem_alloc); | |
134 | ||
135 | if (amt >= asoc->base.sk->sk_sndbuf) { | |
136 | if (asoc->base.sk->sk_userlocks & SOCK_SNDBUF_LOCK) | |
137 | amt = 0; | |
138 | else { | |
139 | amt = sk_stream_wspace(asoc->base.sk); | |
140 | if (amt < 0) | |
141 | amt = 0; | |
142 | } | |
4eb701df | 143 | } else { |
4d93df0a | 144 | amt = asoc->base.sk->sk_sndbuf - amt; |
4eb701df | 145 | } |
1da177e4 LT |
146 | return amt; |
147 | } | |
148 | ||
149 | /* Increment the used sndbuf space count of the corresponding association by | |
150 | * the size of the outgoing data chunk. | |
151 | * Also, set the skb destructor for sndbuf accounting later. | |
152 | * | |
153 | * Since it is always 1-1 between chunk and skb, and also a new skb is always | |
154 | * allocated for chunk bundling in sctp_packet_transmit(), we can use the | |
155 | * destructor in the data chunk skb for the purpose of the sndbuf space | |
156 | * tracking. | |
157 | */ | |
158 | static inline void sctp_set_owner_w(struct sctp_chunk *chunk) | |
159 | { | |
160 | struct sctp_association *asoc = chunk->asoc; | |
161 | struct sock *sk = asoc->base.sk; | |
162 | ||
163 | /* The sndbuf space is tracked per association. */ | |
164 | sctp_association_hold(asoc); | |
165 | ||
4eb701df NH |
166 | skb_set_owner_w(chunk->skb, sk); |
167 | ||
1da177e4 LT |
168 | chunk->skb->destructor = sctp_wfree; |
169 | /* Save the chunk pointer in skb for sctp_wfree to use later. */ | |
170 | *((struct sctp_chunk **)(chunk->skb->cb)) = chunk; | |
171 | ||
4eb701df NH |
172 | asoc->sndbuf_used += SCTP_DATA_SNDSIZE(chunk) + |
173 | sizeof(struct sk_buff) + | |
174 | sizeof(struct sctp_chunk); | |
175 | ||
4eb701df | 176 | atomic_add(sizeof(struct sctp_chunk), &sk->sk_wmem_alloc); |
3ab224be HA |
177 | sk->sk_wmem_queued += chunk->skb->truesize; |
178 | sk_mem_charge(sk, chunk->skb->truesize); | |
1da177e4 LT |
179 | } |
180 | ||
181 | /* Verify that this is a valid address. */ | |
182 | static inline int sctp_verify_addr(struct sock *sk, union sctp_addr *addr, | |
183 | int len) | |
184 | { | |
185 | struct sctp_af *af; | |
186 | ||
187 | /* Verify basic sockaddr. */ | |
188 | af = sctp_sockaddr_af(sctp_sk(sk), addr, len); | |
189 | if (!af) | |
190 | return -EINVAL; | |
191 | ||
192 | /* Is this a valid SCTP address? */ | |
5636bef7 | 193 | if (!af->addr_valid(addr, sctp_sk(sk), NULL)) |
1da177e4 LT |
194 | return -EINVAL; |
195 | ||
196 | if (!sctp_sk(sk)->pf->send_verify(sctp_sk(sk), (addr))) | |
197 | return -EINVAL; | |
198 | ||
199 | return 0; | |
200 | } | |
201 | ||
202 | /* Look up the association by its id. If this is not a UDP-style | |
203 | * socket, the ID field is always ignored. | |
204 | */ | |
205 | struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id) | |
206 | { | |
207 | struct sctp_association *asoc = NULL; | |
208 | ||
209 | /* If this is not a UDP-style socket, assoc id should be ignored. */ | |
210 | if (!sctp_style(sk, UDP)) { | |
211 | /* Return NULL if the socket state is not ESTABLISHED. It | |
212 | * could be a TCP-style listening socket or a socket which | |
213 | * hasn't yet called connect() to establish an association. | |
214 | */ | |
215 | if (!sctp_sstate(sk, ESTABLISHED)) | |
216 | return NULL; | |
217 | ||
218 | /* Get the first and the only association from the list. */ | |
219 | if (!list_empty(&sctp_sk(sk)->ep->asocs)) | |
220 | asoc = list_entry(sctp_sk(sk)->ep->asocs.next, | |
221 | struct sctp_association, asocs); | |
222 | return asoc; | |
223 | } | |
224 | ||
225 | /* Otherwise this is a UDP-style socket. */ | |
226 | if (!id || (id == (sctp_assoc_t)-1)) | |
227 | return NULL; | |
228 | ||
229 | spin_lock_bh(&sctp_assocs_id_lock); | |
230 | asoc = (struct sctp_association *)idr_find(&sctp_assocs_id, (int)id); | |
231 | spin_unlock_bh(&sctp_assocs_id_lock); | |
232 | ||
233 | if (!asoc || (asoc->base.sk != sk) || asoc->base.dead) | |
234 | return NULL; | |
235 | ||
236 | return asoc; | |
237 | } | |
238 | ||
239 | /* Look up the transport from an address and an assoc id. If both address and | |
240 | * id are specified, the associations matching the address and the id should be | |
241 | * the same. | |
242 | */ | |
243 | static struct sctp_transport *sctp_addr_id2transport(struct sock *sk, | |
244 | struct sockaddr_storage *addr, | |
245 | sctp_assoc_t id) | |
246 | { | |
247 | struct sctp_association *addr_asoc = NULL, *id_asoc = NULL; | |
248 | struct sctp_transport *transport; | |
249 | union sctp_addr *laddr = (union sctp_addr *)addr; | |
250 | ||
1da177e4 | 251 | addr_asoc = sctp_endpoint_lookup_assoc(sctp_sk(sk)->ep, |
cd4ff034 | 252 | laddr, |
1da177e4 | 253 | &transport); |
1da177e4 LT |
254 | |
255 | if (!addr_asoc) | |
256 | return NULL; | |
257 | ||
258 | id_asoc = sctp_id2assoc(sk, id); | |
259 | if (id_asoc && (id_asoc != addr_asoc)) | |
260 | return NULL; | |
261 | ||
262 | sctp_get_pf_specific(sk->sk_family)->addr_v4map(sctp_sk(sk), | |
263 | (union sctp_addr *)addr); | |
264 | ||
265 | return transport; | |
266 | } | |
267 | ||
268 | /* API 3.1.2 bind() - UDP Style Syntax | |
269 | * The syntax of bind() is, | |
270 | * | |
271 | * ret = bind(int sd, struct sockaddr *addr, int addrlen); | |
272 | * | |
273 | * sd - the socket descriptor returned by socket(). | |
274 | * addr - the address structure (struct sockaddr_in or struct | |
275 | * sockaddr_in6 [RFC 2553]), | |
276 | * addr_len - the size of the address structure. | |
277 | */ | |
3f7a87d2 | 278 | SCTP_STATIC int sctp_bind(struct sock *sk, struct sockaddr *addr, int addr_len) |
1da177e4 LT |
279 | { |
280 | int retval = 0; | |
281 | ||
282 | sctp_lock_sock(sk); | |
283 | ||
3f7a87d2 FF |
284 | SCTP_DEBUG_PRINTK("sctp_bind(sk: %p, addr: %p, addr_len: %d)\n", |
285 | sk, addr, addr_len); | |
1da177e4 LT |
286 | |
287 | /* Disallow binding twice. */ | |
288 | if (!sctp_sk(sk)->ep->base.bind_addr.port) | |
3f7a87d2 | 289 | retval = sctp_do_bind(sk, (union sctp_addr *)addr, |
1da177e4 LT |
290 | addr_len); |
291 | else | |
292 | retval = -EINVAL; | |
293 | ||
294 | sctp_release_sock(sk); | |
295 | ||
296 | return retval; | |
297 | } | |
298 | ||
299 | static long sctp_get_port_local(struct sock *, union sctp_addr *); | |
300 | ||
301 | /* Verify this is a valid sockaddr. */ | |
302 | static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt, | |
303 | union sctp_addr *addr, int len) | |
304 | { | |
305 | struct sctp_af *af; | |
306 | ||
307 | /* Check minimum size. */ | |
308 | if (len < sizeof (struct sockaddr)) | |
309 | return NULL; | |
310 | ||
7dab83de VY |
311 | /* V4 mapped address are really of AF_INET family */ |
312 | if (addr->sa.sa_family == AF_INET6 && | |
313 | ipv6_addr_v4mapped(&addr->v6.sin6_addr)) { | |
314 | if (!opt->pf->af_supported(AF_INET, opt)) | |
315 | return NULL; | |
316 | } else { | |
317 | /* Does this PF support this AF? */ | |
318 | if (!opt->pf->af_supported(addr->sa.sa_family, opt)) | |
319 | return NULL; | |
320 | } | |
1da177e4 LT |
321 | |
322 | /* If we get this far, af is valid. */ | |
323 | af = sctp_get_af_specific(addr->sa.sa_family); | |
324 | ||
325 | if (len < af->sockaddr_len) | |
326 | return NULL; | |
327 | ||
328 | return af; | |
329 | } | |
330 | ||
331 | /* Bind a local address either to an endpoint or to an association. */ | |
332 | SCTP_STATIC int sctp_do_bind(struct sock *sk, union sctp_addr *addr, int len) | |
333 | { | |
334 | struct sctp_sock *sp = sctp_sk(sk); | |
335 | struct sctp_endpoint *ep = sp->ep; | |
336 | struct sctp_bind_addr *bp = &ep->base.bind_addr; | |
337 | struct sctp_af *af; | |
338 | unsigned short snum; | |
339 | int ret = 0; | |
340 | ||
1da177e4 LT |
341 | /* Common sockaddr verification. */ |
342 | af = sctp_sockaddr_af(sp, addr, len); | |
3f7a87d2 FF |
343 | if (!af) { |
344 | SCTP_DEBUG_PRINTK("sctp_do_bind(sk: %p, newaddr: %p, len: %d) EINVAL\n", | |
345 | sk, addr, len); | |
1da177e4 | 346 | return -EINVAL; |
3f7a87d2 FF |
347 | } |
348 | ||
349 | snum = ntohs(addr->v4.sin_port); | |
350 | ||
351 | SCTP_DEBUG_PRINTK_IPADDR("sctp_do_bind(sk: %p, new addr: ", | |
352 | ", port: %d, new port: %d, len: %d)\n", | |
353 | sk, | |
354 | addr, | |
355 | bp->port, snum, | |
356 | len); | |
1da177e4 LT |
357 | |
358 | /* PF specific bind() address verification. */ | |
359 | if (!sp->pf->bind_verify(sp, addr)) | |
360 | return -EADDRNOTAVAIL; | |
361 | ||
8b358056 VY |
362 | /* We must either be unbound, or bind to the same port. |
363 | * It's OK to allow 0 ports if we are already bound. | |
364 | * We'll just inhert an already bound port in this case | |
365 | */ | |
366 | if (bp->port) { | |
367 | if (!snum) | |
368 | snum = bp->port; | |
369 | else if (snum != bp->port) { | |
370 | SCTP_DEBUG_PRINTK("sctp_do_bind:" | |
1da177e4 LT |
371 | " New port %d does not match existing port " |
372 | "%d.\n", snum, bp->port); | |
8b358056 VY |
373 | return -EINVAL; |
374 | } | |
1da177e4 LT |
375 | } |
376 | ||
377 | if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) | |
378 | return -EACCES; | |
379 | ||
380 | /* Make sure we are allowed to bind here. | |
381 | * The function sctp_get_port_local() does duplicate address | |
382 | * detection. | |
383 | */ | |
2772b495 | 384 | addr->v4.sin_port = htons(snum); |
1da177e4 LT |
385 | if ((ret = sctp_get_port_local(sk, addr))) { |
386 | if (ret == (long) sk) { | |
387 | /* This endpoint has a conflicting address. */ | |
388 | return -EINVAL; | |
389 | } else { | |
390 | return -EADDRINUSE; | |
391 | } | |
392 | } | |
393 | ||
394 | /* Refresh ephemeral port. */ | |
395 | if (!bp->port) | |
396 | bp->port = inet_sk(sk)->num; | |
397 | ||
559cf710 VY |
398 | /* Add the address to the bind address list. |
399 | * Use GFP_ATOMIC since BHs will be disabled. | |
400 | */ | |
f57d96b2 | 401 | ret = sctp_add_bind_addr(bp, addr, SCTP_ADDR_SRC, GFP_ATOMIC); |
1da177e4 LT |
402 | |
403 | /* Copy back into socket for getsockname() use. */ | |
404 | if (!ret) { | |
405 | inet_sk(sk)->sport = htons(inet_sk(sk)->num); | |
406 | af->to_sk_saddr(addr, sk); | |
407 | } | |
408 | ||
409 | return ret; | |
410 | } | |
411 | ||
412 | /* ADDIP Section 4.1.1 Congestion Control of ASCONF Chunks | |
413 | * | |
d808ad9a | 414 | * R1) One and only one ASCONF Chunk MAY be in transit and unacknowledged |
1da177e4 | 415 | * at any one time. If a sender, after sending an ASCONF chunk, decides |
d808ad9a | 416 | * it needs to transfer another ASCONF Chunk, it MUST wait until the |
1da177e4 | 417 | * ASCONF-ACK Chunk returns from the previous ASCONF Chunk before sending a |
d808ad9a YH |
418 | * subsequent ASCONF. Note this restriction binds each side, so at any |
419 | * time two ASCONF may be in-transit on any given association (one sent | |
1da177e4 LT |
420 | * from each endpoint). |
421 | */ | |
422 | static int sctp_send_asconf(struct sctp_association *asoc, | |
423 | struct sctp_chunk *chunk) | |
424 | { | |
425 | int retval = 0; | |
426 | ||
427 | /* If there is an outstanding ASCONF chunk, queue it for later | |
428 | * transmission. | |
d808ad9a | 429 | */ |
1da177e4 | 430 | if (asoc->addip_last_asconf) { |
79af02c2 | 431 | list_add_tail(&chunk->list, &asoc->addip_chunk_list); |
d808ad9a | 432 | goto out; |
1da177e4 LT |
433 | } |
434 | ||
435 | /* Hold the chunk until an ASCONF_ACK is received. */ | |
436 | sctp_chunk_hold(chunk); | |
437 | retval = sctp_primitive_ASCONF(asoc, chunk); | |
438 | if (retval) | |
439 | sctp_chunk_free(chunk); | |
440 | else | |
441 | asoc->addip_last_asconf = chunk; | |
442 | ||
443 | out: | |
444 | return retval; | |
445 | } | |
446 | ||
447 | /* Add a list of addresses as bind addresses to local endpoint or | |
448 | * association. | |
449 | * | |
450 | * Basically run through each address specified in the addrs/addrcnt | |
451 | * array/length pair, determine if it is IPv6 or IPv4 and call | |
452 | * sctp_do_bind() on it. | |
453 | * | |
454 | * If any of them fails, then the operation will be reversed and the | |
455 | * ones that were added will be removed. | |
456 | * | |
457 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
458 | */ | |
04675210 | 459 | static int sctp_bindx_add(struct sock *sk, struct sockaddr *addrs, int addrcnt) |
1da177e4 LT |
460 | { |
461 | int cnt; | |
462 | int retval = 0; | |
463 | void *addr_buf; | |
464 | struct sockaddr *sa_addr; | |
465 | struct sctp_af *af; | |
466 | ||
467 | SCTP_DEBUG_PRINTK("sctp_bindx_add (sk: %p, addrs: %p, addrcnt: %d)\n", | |
468 | sk, addrs, addrcnt); | |
469 | ||
470 | addr_buf = addrs; | |
471 | for (cnt = 0; cnt < addrcnt; cnt++) { | |
472 | /* The list may contain either IPv4 or IPv6 address; | |
473 | * determine the address length for walking thru the list. | |
474 | */ | |
475 | sa_addr = (struct sockaddr *)addr_buf; | |
476 | af = sctp_get_af_specific(sa_addr->sa_family); | |
477 | if (!af) { | |
478 | retval = -EINVAL; | |
479 | goto err_bindx_add; | |
480 | } | |
481 | ||
d808ad9a | 482 | retval = sctp_do_bind(sk, (union sctp_addr *)sa_addr, |
1da177e4 LT |
483 | af->sockaddr_len); |
484 | ||
485 | addr_buf += af->sockaddr_len; | |
486 | ||
487 | err_bindx_add: | |
488 | if (retval < 0) { | |
489 | /* Failed. Cleanup the ones that have been added */ | |
490 | if (cnt > 0) | |
491 | sctp_bindx_rem(sk, addrs, cnt); | |
492 | return retval; | |
493 | } | |
494 | } | |
495 | ||
496 | return retval; | |
497 | } | |
498 | ||
499 | /* Send an ASCONF chunk with Add IP address parameters to all the peers of the | |
500 | * associations that are part of the endpoint indicating that a list of local | |
501 | * addresses are added to the endpoint. | |
502 | * | |
d808ad9a | 503 | * If any of the addresses is already in the bind address list of the |
1da177e4 LT |
504 | * association, we do not send the chunk for that association. But it will not |
505 | * affect other associations. | |
506 | * | |
507 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
508 | */ | |
d808ad9a | 509 | static int sctp_send_asconf_add_ip(struct sock *sk, |
1da177e4 LT |
510 | struct sockaddr *addrs, |
511 | int addrcnt) | |
512 | { | |
513 | struct sctp_sock *sp; | |
514 | struct sctp_endpoint *ep; | |
515 | struct sctp_association *asoc; | |
516 | struct sctp_bind_addr *bp; | |
517 | struct sctp_chunk *chunk; | |
518 | struct sctp_sockaddr_entry *laddr; | |
519 | union sctp_addr *addr; | |
dc022a98 | 520 | union sctp_addr saveaddr; |
1da177e4 LT |
521 | void *addr_buf; |
522 | struct sctp_af *af; | |
1da177e4 LT |
523 | struct list_head *p; |
524 | int i; | |
525 | int retval = 0; | |
526 | ||
527 | if (!sctp_addip_enable) | |
528 | return retval; | |
529 | ||
530 | sp = sctp_sk(sk); | |
531 | ep = sp->ep; | |
532 | ||
533 | SCTP_DEBUG_PRINTK("%s: (sk: %p, addrs: %p, addrcnt: %d)\n", | |
0dc47877 | 534 | __func__, sk, addrs, addrcnt); |
1da177e4 | 535 | |
9dbc15f0 | 536 | list_for_each_entry(asoc, &ep->asocs, asocs) { |
1da177e4 LT |
537 | |
538 | if (!asoc->peer.asconf_capable) | |
539 | continue; | |
540 | ||
541 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_ADD_IP) | |
542 | continue; | |
543 | ||
544 | if (!sctp_state(asoc, ESTABLISHED)) | |
545 | continue; | |
546 | ||
547 | /* Check if any address in the packed array of addresses is | |
d808ad9a YH |
548 | * in the bind address list of the association. If so, |
549 | * do not send the asconf chunk to its peer, but continue with | |
1da177e4 LT |
550 | * other associations. |
551 | */ | |
552 | addr_buf = addrs; | |
553 | for (i = 0; i < addrcnt; i++) { | |
554 | addr = (union sctp_addr *)addr_buf; | |
555 | af = sctp_get_af_specific(addr->v4.sin_family); | |
556 | if (!af) { | |
557 | retval = -EINVAL; | |
558 | goto out; | |
559 | } | |
560 | ||
561 | if (sctp_assoc_lookup_laddr(asoc, addr)) | |
562 | break; | |
563 | ||
564 | addr_buf += af->sockaddr_len; | |
565 | } | |
566 | if (i < addrcnt) | |
567 | continue; | |
568 | ||
559cf710 VY |
569 | /* Use the first valid address in bind addr list of |
570 | * association as Address Parameter of ASCONF CHUNK. | |
1da177e4 | 571 | */ |
1da177e4 LT |
572 | bp = &asoc->base.bind_addr; |
573 | p = bp->address_list.next; | |
574 | laddr = list_entry(p, struct sctp_sockaddr_entry, list); | |
5ae955cf | 575 | chunk = sctp_make_asconf_update_ip(asoc, &laddr->a, addrs, |
1da177e4 LT |
576 | addrcnt, SCTP_PARAM_ADD_IP); |
577 | if (!chunk) { | |
578 | retval = -ENOMEM; | |
579 | goto out; | |
580 | } | |
581 | ||
582 | retval = sctp_send_asconf(asoc, chunk); | |
dc022a98 SS |
583 | if (retval) |
584 | goto out; | |
1da177e4 | 585 | |
dc022a98 SS |
586 | /* Add the new addresses to the bind address list with |
587 | * use_as_src set to 0. | |
1da177e4 | 588 | */ |
dc022a98 SS |
589 | addr_buf = addrs; |
590 | for (i = 0; i < addrcnt; i++) { | |
591 | addr = (union sctp_addr *)addr_buf; | |
592 | af = sctp_get_af_specific(addr->v4.sin_family); | |
593 | memcpy(&saveaddr, addr, af->sockaddr_len); | |
f57d96b2 VY |
594 | retval = sctp_add_bind_addr(bp, &saveaddr, |
595 | SCTP_ADDR_NEW, GFP_ATOMIC); | |
dc022a98 SS |
596 | addr_buf += af->sockaddr_len; |
597 | } | |
1da177e4 LT |
598 | } |
599 | ||
600 | out: | |
601 | return retval; | |
602 | } | |
603 | ||
604 | /* Remove a list of addresses from bind addresses list. Do not remove the | |
605 | * last address. | |
606 | * | |
607 | * Basically run through each address specified in the addrs/addrcnt | |
608 | * array/length pair, determine if it is IPv6 or IPv4 and call | |
609 | * sctp_del_bind() on it. | |
610 | * | |
611 | * If any of them fails, then the operation will be reversed and the | |
612 | * ones that were removed will be added back. | |
613 | * | |
614 | * At least one address has to be left; if only one address is | |
615 | * available, the operation will return -EBUSY. | |
616 | * | |
617 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
618 | */ | |
04675210 | 619 | static int sctp_bindx_rem(struct sock *sk, struct sockaddr *addrs, int addrcnt) |
1da177e4 LT |
620 | { |
621 | struct sctp_sock *sp = sctp_sk(sk); | |
622 | struct sctp_endpoint *ep = sp->ep; | |
623 | int cnt; | |
624 | struct sctp_bind_addr *bp = &ep->base.bind_addr; | |
625 | int retval = 0; | |
1da177e4 | 626 | void *addr_buf; |
c9a08505 | 627 | union sctp_addr *sa_addr; |
1da177e4 LT |
628 | struct sctp_af *af; |
629 | ||
630 | SCTP_DEBUG_PRINTK("sctp_bindx_rem (sk: %p, addrs: %p, addrcnt: %d)\n", | |
631 | sk, addrs, addrcnt); | |
632 | ||
633 | addr_buf = addrs; | |
634 | for (cnt = 0; cnt < addrcnt; cnt++) { | |
635 | /* If the bind address list is empty or if there is only one | |
636 | * bind address, there is nothing more to be removed (we need | |
637 | * at least one address here). | |
638 | */ | |
639 | if (list_empty(&bp->address_list) || | |
640 | (sctp_list_single_entry(&bp->address_list))) { | |
641 | retval = -EBUSY; | |
642 | goto err_bindx_rem; | |
643 | } | |
644 | ||
c9a08505 AV |
645 | sa_addr = (union sctp_addr *)addr_buf; |
646 | af = sctp_get_af_specific(sa_addr->sa.sa_family); | |
1da177e4 LT |
647 | if (!af) { |
648 | retval = -EINVAL; | |
649 | goto err_bindx_rem; | |
650 | } | |
0304ff8a PG |
651 | |
652 | if (!af->addr_valid(sa_addr, sp, NULL)) { | |
653 | retval = -EADDRNOTAVAIL; | |
654 | goto err_bindx_rem; | |
655 | } | |
656 | ||
c9a08505 | 657 | if (sa_addr->v4.sin_port != htons(bp->port)) { |
1da177e4 LT |
658 | retval = -EINVAL; |
659 | goto err_bindx_rem; | |
660 | } | |
661 | ||
662 | /* FIXME - There is probably a need to check if sk->sk_saddr and | |
663 | * sk->sk_rcv_addr are currently set to one of the addresses to | |
664 | * be removed. This is something which needs to be looked into | |
665 | * when we are fixing the outstanding issues with multi-homing | |
666 | * socket routing and failover schemes. Refer to comments in | |
667 | * sctp_do_bind(). -daisy | |
668 | */ | |
0ed90fb0 | 669 | retval = sctp_del_bind_addr(bp, sa_addr); |
1da177e4 LT |
670 | |
671 | addr_buf += af->sockaddr_len; | |
672 | err_bindx_rem: | |
673 | if (retval < 0) { | |
674 | /* Failed. Add the ones that has been removed back */ | |
675 | if (cnt > 0) | |
676 | sctp_bindx_add(sk, addrs, cnt); | |
677 | return retval; | |
678 | } | |
679 | } | |
680 | ||
681 | return retval; | |
682 | } | |
683 | ||
684 | /* Send an ASCONF chunk with Delete IP address parameters to all the peers of | |
685 | * the associations that are part of the endpoint indicating that a list of | |
686 | * local addresses are removed from the endpoint. | |
687 | * | |
d808ad9a | 688 | * If any of the addresses is already in the bind address list of the |
1da177e4 LT |
689 | * association, we do not send the chunk for that association. But it will not |
690 | * affect other associations. | |
691 | * | |
692 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
693 | */ | |
694 | static int sctp_send_asconf_del_ip(struct sock *sk, | |
695 | struct sockaddr *addrs, | |
696 | int addrcnt) | |
697 | { | |
698 | struct sctp_sock *sp; | |
699 | struct sctp_endpoint *ep; | |
700 | struct sctp_association *asoc; | |
dc022a98 | 701 | struct sctp_transport *transport; |
1da177e4 LT |
702 | struct sctp_bind_addr *bp; |
703 | struct sctp_chunk *chunk; | |
704 | union sctp_addr *laddr; | |
705 | void *addr_buf; | |
706 | struct sctp_af *af; | |
dc022a98 | 707 | struct sctp_sockaddr_entry *saddr; |
1da177e4 LT |
708 | int i; |
709 | int retval = 0; | |
710 | ||
711 | if (!sctp_addip_enable) | |
712 | return retval; | |
713 | ||
714 | sp = sctp_sk(sk); | |
715 | ep = sp->ep; | |
716 | ||
717 | SCTP_DEBUG_PRINTK("%s: (sk: %p, addrs: %p, addrcnt: %d)\n", | |
0dc47877 | 718 | __func__, sk, addrs, addrcnt); |
1da177e4 | 719 | |
9dbc15f0 | 720 | list_for_each_entry(asoc, &ep->asocs, asocs) { |
1da177e4 LT |
721 | |
722 | if (!asoc->peer.asconf_capable) | |
723 | continue; | |
724 | ||
725 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_DEL_IP) | |
726 | continue; | |
727 | ||
728 | if (!sctp_state(asoc, ESTABLISHED)) | |
729 | continue; | |
730 | ||
731 | /* Check if any address in the packed array of addresses is | |
d808ad9a | 732 | * not present in the bind address list of the association. |
1da177e4 LT |
733 | * If so, do not send the asconf chunk to its peer, but |
734 | * continue with other associations. | |
735 | */ | |
736 | addr_buf = addrs; | |
737 | for (i = 0; i < addrcnt; i++) { | |
738 | laddr = (union sctp_addr *)addr_buf; | |
739 | af = sctp_get_af_specific(laddr->v4.sin_family); | |
740 | if (!af) { | |
741 | retval = -EINVAL; | |
742 | goto out; | |
743 | } | |
744 | ||
745 | if (!sctp_assoc_lookup_laddr(asoc, laddr)) | |
746 | break; | |
747 | ||
748 | addr_buf += af->sockaddr_len; | |
749 | } | |
750 | if (i < addrcnt) | |
751 | continue; | |
752 | ||
753 | /* Find one address in the association's bind address list | |
754 | * that is not in the packed array of addresses. This is to | |
755 | * make sure that we do not delete all the addresses in the | |
756 | * association. | |
757 | */ | |
1da177e4 LT |
758 | bp = &asoc->base.bind_addr; |
759 | laddr = sctp_find_unmatch_addr(bp, (union sctp_addr *)addrs, | |
760 | addrcnt, sp); | |
1da177e4 LT |
761 | if (!laddr) |
762 | continue; | |
763 | ||
559cf710 VY |
764 | /* We do not need RCU protection throughout this loop |
765 | * because this is done under a socket lock from the | |
766 | * setsockopt call. | |
767 | */ | |
1da177e4 LT |
768 | chunk = sctp_make_asconf_update_ip(asoc, laddr, addrs, addrcnt, |
769 | SCTP_PARAM_DEL_IP); | |
770 | if (!chunk) { | |
771 | retval = -ENOMEM; | |
772 | goto out; | |
773 | } | |
774 | ||
dc022a98 SS |
775 | /* Reset use_as_src flag for the addresses in the bind address |
776 | * list that are to be deleted. | |
777 | */ | |
dc022a98 SS |
778 | addr_buf = addrs; |
779 | for (i = 0; i < addrcnt; i++) { | |
780 | laddr = (union sctp_addr *)addr_buf; | |
781 | af = sctp_get_af_specific(laddr->v4.sin_family); | |
559cf710 | 782 | list_for_each_entry(saddr, &bp->address_list, list) { |
5f242a13 | 783 | if (sctp_cmp_addr_exact(&saddr->a, laddr)) |
f57d96b2 | 784 | saddr->state = SCTP_ADDR_DEL; |
dc022a98 SS |
785 | } |
786 | addr_buf += af->sockaddr_len; | |
787 | } | |
1da177e4 | 788 | |
dc022a98 SS |
789 | /* Update the route and saddr entries for all the transports |
790 | * as some of the addresses in the bind address list are | |
791 | * about to be deleted and cannot be used as source addresses. | |
1da177e4 | 792 | */ |
9dbc15f0 RD |
793 | list_for_each_entry(transport, &asoc->peer.transport_addr_list, |
794 | transports) { | |
dc022a98 SS |
795 | dst_release(transport->dst); |
796 | sctp_transport_route(transport, NULL, | |
797 | sctp_sk(asoc->base.sk)); | |
798 | } | |
799 | ||
800 | retval = sctp_send_asconf(asoc, chunk); | |
1da177e4 LT |
801 | } |
802 | out: | |
803 | return retval; | |
804 | } | |
805 | ||
806 | /* Helper for tunneling sctp_bindx() requests through sctp_setsockopt() | |
807 | * | |
808 | * API 8.1 | |
809 | * int sctp_bindx(int sd, struct sockaddr *addrs, int addrcnt, | |
810 | * int flags); | |
811 | * | |
812 | * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses. | |
813 | * If the sd is an IPv6 socket, the addresses passed can either be IPv4 | |
814 | * or IPv6 addresses. | |
815 | * | |
816 | * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see | |
817 | * Section 3.1.2 for this usage. | |
818 | * | |
819 | * addrs is a pointer to an array of one or more socket addresses. Each | |
820 | * address is contained in its appropriate structure (i.e. struct | |
821 | * sockaddr_in or struct sockaddr_in6) the family of the address type | |
23c435f7 | 822 | * must be used to distinguish the address length (note that this |
1da177e4 LT |
823 | * representation is termed a "packed array" of addresses). The caller |
824 | * specifies the number of addresses in the array with addrcnt. | |
825 | * | |
826 | * On success, sctp_bindx() returns 0. On failure, sctp_bindx() returns | |
827 | * -1, and sets errno to the appropriate error code. | |
828 | * | |
829 | * For SCTP, the port given in each socket address must be the same, or | |
830 | * sctp_bindx() will fail, setting errno to EINVAL. | |
831 | * | |
832 | * The flags parameter is formed from the bitwise OR of zero or more of | |
833 | * the following currently defined flags: | |
834 | * | |
835 | * SCTP_BINDX_ADD_ADDR | |
836 | * | |
837 | * SCTP_BINDX_REM_ADDR | |
838 | * | |
839 | * SCTP_BINDX_ADD_ADDR directs SCTP to add the given addresses to the | |
840 | * association, and SCTP_BINDX_REM_ADDR directs SCTP to remove the given | |
841 | * addresses from the association. The two flags are mutually exclusive; | |
842 | * if both are given, sctp_bindx() will fail with EINVAL. A caller may | |
843 | * not remove all addresses from an association; sctp_bindx() will | |
844 | * reject such an attempt with EINVAL. | |
845 | * | |
846 | * An application can use sctp_bindx(SCTP_BINDX_ADD_ADDR) to associate | |
847 | * additional addresses with an endpoint after calling bind(). Or use | |
848 | * sctp_bindx(SCTP_BINDX_REM_ADDR) to remove some addresses a listening | |
849 | * socket is associated with so that no new association accepted will be | |
850 | * associated with those addresses. If the endpoint supports dynamic | |
851 | * address a SCTP_BINDX_REM_ADDR or SCTP_BINDX_ADD_ADDR may cause a | |
852 | * endpoint to send the appropriate message to the peer to change the | |
853 | * peers address lists. | |
854 | * | |
855 | * Adding and removing addresses from a connected association is | |
856 | * optional functionality. Implementations that do not support this | |
857 | * functionality should return EOPNOTSUPP. | |
858 | * | |
859 | * Basically do nothing but copying the addresses from user to kernel | |
860 | * land and invoking either sctp_bindx_add() or sctp_bindx_rem() on the sk. | |
3f7a87d2 FF |
861 | * This is used for tunneling the sctp_bindx() request through sctp_setsockopt() |
862 | * from userspace. | |
1da177e4 LT |
863 | * |
864 | * We don't use copy_from_user() for optimization: we first do the | |
865 | * sanity checks (buffer size -fast- and access check-healthy | |
866 | * pointer); if all of those succeed, then we can alloc the memory | |
867 | * (expensive operation) needed to copy the data to kernel. Then we do | |
868 | * the copying without checking the user space area | |
869 | * (__copy_from_user()). | |
870 | * | |
871 | * On exit there is no need to do sockfd_put(), sys_setsockopt() does | |
872 | * it. | |
873 | * | |
874 | * sk The sk of the socket | |
875 | * addrs The pointer to the addresses in user land | |
876 | * addrssize Size of the addrs buffer | |
877 | * op Operation to perform (add or remove, see the flags of | |
878 | * sctp_bindx) | |
879 | * | |
880 | * Returns 0 if ok, <0 errno code on error. | |
881 | */ | |
882 | SCTP_STATIC int sctp_setsockopt_bindx(struct sock* sk, | |
883 | struct sockaddr __user *addrs, | |
884 | int addrs_size, int op) | |
885 | { | |
886 | struct sockaddr *kaddrs; | |
887 | int err; | |
888 | int addrcnt = 0; | |
889 | int walk_size = 0; | |
890 | struct sockaddr *sa_addr; | |
891 | void *addr_buf; | |
892 | struct sctp_af *af; | |
893 | ||
894 | SCTP_DEBUG_PRINTK("sctp_setsocktopt_bindx: sk %p addrs %p" | |
895 | " addrs_size %d opt %d\n", sk, addrs, addrs_size, op); | |
896 | ||
897 | if (unlikely(addrs_size <= 0)) | |
898 | return -EINVAL; | |
899 | ||
900 | /* Check the user passed a healthy pointer. */ | |
901 | if (unlikely(!access_ok(VERIFY_READ, addrs, addrs_size))) | |
902 | return -EFAULT; | |
903 | ||
904 | /* Alloc space for the address array in kernel memory. */ | |
8b3a7005 | 905 | kaddrs = kmalloc(addrs_size, GFP_KERNEL); |
1da177e4 LT |
906 | if (unlikely(!kaddrs)) |
907 | return -ENOMEM; | |
908 | ||
909 | if (__copy_from_user(kaddrs, addrs, addrs_size)) { | |
910 | kfree(kaddrs); | |
911 | return -EFAULT; | |
912 | } | |
913 | ||
d808ad9a | 914 | /* Walk through the addrs buffer and count the number of addresses. */ |
1da177e4 LT |
915 | addr_buf = kaddrs; |
916 | while (walk_size < addrs_size) { | |
917 | sa_addr = (struct sockaddr *)addr_buf; | |
918 | af = sctp_get_af_specific(sa_addr->sa_family); | |
919 | ||
920 | /* If the address family is not supported or if this address | |
921 | * causes the address buffer to overflow return EINVAL. | |
d808ad9a | 922 | */ |
1da177e4 LT |
923 | if (!af || (walk_size + af->sockaddr_len) > addrs_size) { |
924 | kfree(kaddrs); | |
925 | return -EINVAL; | |
926 | } | |
927 | addrcnt++; | |
928 | addr_buf += af->sockaddr_len; | |
929 | walk_size += af->sockaddr_len; | |
930 | } | |
931 | ||
932 | /* Do the work. */ | |
933 | switch (op) { | |
934 | case SCTP_BINDX_ADD_ADDR: | |
935 | err = sctp_bindx_add(sk, kaddrs, addrcnt); | |
936 | if (err) | |
937 | goto out; | |
938 | err = sctp_send_asconf_add_ip(sk, kaddrs, addrcnt); | |
939 | break; | |
940 | ||
941 | case SCTP_BINDX_REM_ADDR: | |
942 | err = sctp_bindx_rem(sk, kaddrs, addrcnt); | |
943 | if (err) | |
944 | goto out; | |
945 | err = sctp_send_asconf_del_ip(sk, kaddrs, addrcnt); | |
946 | break; | |
947 | ||
948 | default: | |
949 | err = -EINVAL; | |
950 | break; | |
3ff50b79 | 951 | } |
1da177e4 LT |
952 | |
953 | out: | |
954 | kfree(kaddrs); | |
955 | ||
956 | return err; | |
957 | } | |
958 | ||
3f7a87d2 FF |
959 | /* __sctp_connect(struct sock* sk, struct sockaddr *kaddrs, int addrs_size) |
960 | * | |
961 | * Common routine for handling connect() and sctp_connectx(). | |
962 | * Connect will come in with just a single address. | |
963 | */ | |
964 | static int __sctp_connect(struct sock* sk, | |
965 | struct sockaddr *kaddrs, | |
88a0a948 VY |
966 | int addrs_size, |
967 | sctp_assoc_t *assoc_id) | |
3f7a87d2 FF |
968 | { |
969 | struct sctp_sock *sp; | |
970 | struct sctp_endpoint *ep; | |
971 | struct sctp_association *asoc = NULL; | |
972 | struct sctp_association *asoc2; | |
973 | struct sctp_transport *transport; | |
974 | union sctp_addr to; | |
975 | struct sctp_af *af; | |
976 | sctp_scope_t scope; | |
977 | long timeo; | |
978 | int err = 0; | |
979 | int addrcnt = 0; | |
980 | int walk_size = 0; | |
e4d1feab | 981 | union sctp_addr *sa_addr = NULL; |
3f7a87d2 | 982 | void *addr_buf; |
16d00fb7 | 983 | unsigned short port; |
f50f95ca | 984 | unsigned int f_flags = 0; |
3f7a87d2 FF |
985 | |
986 | sp = sctp_sk(sk); | |
987 | ep = sp->ep; | |
988 | ||
989 | /* connect() cannot be done on a socket that is already in ESTABLISHED | |
990 | * state - UDP-style peeled off socket or a TCP-style socket that | |
991 | * is already connected. | |
992 | * It cannot be done even on a TCP-style listening socket. | |
993 | */ | |
994 | if (sctp_sstate(sk, ESTABLISHED) || | |
995 | (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))) { | |
996 | err = -EISCONN; | |
997 | goto out_free; | |
998 | } | |
999 | ||
1000 | /* Walk through the addrs buffer and count the number of addresses. */ | |
1001 | addr_buf = kaddrs; | |
1002 | while (walk_size < addrs_size) { | |
4bdf4b5f AV |
1003 | sa_addr = (union sctp_addr *)addr_buf; |
1004 | af = sctp_get_af_specific(sa_addr->sa.sa_family); | |
16d00fb7 | 1005 | port = ntohs(sa_addr->v4.sin_port); |
3f7a87d2 FF |
1006 | |
1007 | /* If the address family is not supported or if this address | |
1008 | * causes the address buffer to overflow return EINVAL. | |
1009 | */ | |
1010 | if (!af || (walk_size + af->sockaddr_len) > addrs_size) { | |
1011 | err = -EINVAL; | |
1012 | goto out_free; | |
1013 | } | |
1014 | ||
e4d1feab VY |
1015 | /* Save current address so we can work with it */ |
1016 | memcpy(&to, sa_addr, af->sockaddr_len); | |
1017 | ||
1018 | err = sctp_verify_addr(sk, &to, af->sockaddr_len); | |
3f7a87d2 FF |
1019 | if (err) |
1020 | goto out_free; | |
1021 | ||
16d00fb7 VY |
1022 | /* Make sure the destination port is correctly set |
1023 | * in all addresses. | |
1024 | */ | |
1025 | if (asoc && asoc->peer.port && asoc->peer.port != port) | |
1026 | goto out_free; | |
1027 | ||
3f7a87d2 FF |
1028 | |
1029 | /* Check if there already is a matching association on the | |
1030 | * endpoint (other than the one created here). | |
1031 | */ | |
e4d1feab | 1032 | asoc2 = sctp_endpoint_lookup_assoc(ep, &to, &transport); |
3f7a87d2 FF |
1033 | if (asoc2 && asoc2 != asoc) { |
1034 | if (asoc2->state >= SCTP_STATE_ESTABLISHED) | |
1035 | err = -EISCONN; | |
1036 | else | |
1037 | err = -EALREADY; | |
1038 | goto out_free; | |
1039 | } | |
1040 | ||
1041 | /* If we could not find a matching association on the endpoint, | |
1042 | * make sure that there is no peeled-off association matching | |
1043 | * the peer address even on another socket. | |
1044 | */ | |
e4d1feab | 1045 | if (sctp_endpoint_is_peeled_off(ep, &to)) { |
3f7a87d2 FF |
1046 | err = -EADDRNOTAVAIL; |
1047 | goto out_free; | |
1048 | } | |
1049 | ||
1050 | if (!asoc) { | |
1051 | /* If a bind() or sctp_bindx() is not called prior to | |
1052 | * an sctp_connectx() call, the system picks an | |
1053 | * ephemeral port and will choose an address set | |
1054 | * equivalent to binding with a wildcard address. | |
1055 | */ | |
1056 | if (!ep->base.bind_addr.port) { | |
1057 | if (sctp_autobind(sk)) { | |
1058 | err = -EAGAIN; | |
1059 | goto out_free; | |
1060 | } | |
64a0c1c8 ISJ |
1061 | } else { |
1062 | /* | |
d808ad9a YH |
1063 | * If an unprivileged user inherits a 1-many |
1064 | * style socket with open associations on a | |
1065 | * privileged port, it MAY be permitted to | |
1066 | * accept new associations, but it SHOULD NOT | |
64a0c1c8 ISJ |
1067 | * be permitted to open new associations. |
1068 | */ | |
1069 | if (ep->base.bind_addr.port < PROT_SOCK && | |
1070 | !capable(CAP_NET_BIND_SERVICE)) { | |
1071 | err = -EACCES; | |
1072 | goto out_free; | |
1073 | } | |
3f7a87d2 FF |
1074 | } |
1075 | ||
e4d1feab | 1076 | scope = sctp_scope(&to); |
3f7a87d2 FF |
1077 | asoc = sctp_association_new(ep, sk, scope, GFP_KERNEL); |
1078 | if (!asoc) { | |
1079 | err = -ENOMEM; | |
1080 | goto out_free; | |
1081 | } | |
1082 | } | |
1083 | ||
1084 | /* Prime the peer's transport structures. */ | |
e4d1feab | 1085 | transport = sctp_assoc_add_peer(asoc, &to, GFP_KERNEL, |
3f7a87d2 FF |
1086 | SCTP_UNKNOWN); |
1087 | if (!transport) { | |
1088 | err = -ENOMEM; | |
1089 | goto out_free; | |
1090 | } | |
1091 | ||
1092 | addrcnt++; | |
1093 | addr_buf += af->sockaddr_len; | |
1094 | walk_size += af->sockaddr_len; | |
1095 | } | |
1096 | ||
1097 | err = sctp_assoc_set_bind_addr_from_ep(asoc, GFP_KERNEL); | |
1098 | if (err < 0) { | |
1099 | goto out_free; | |
1100 | } | |
1101 | ||
1102 | err = sctp_primitive_ASSOCIATE(asoc, NULL); | |
1103 | if (err < 0) { | |
1104 | goto out_free; | |
1105 | } | |
1106 | ||
1107 | /* Initialize sk's dport and daddr for getpeername() */ | |
1108 | inet_sk(sk)->dport = htons(asoc->peer.port); | |
e4d1feab VY |
1109 | af = sctp_get_af_specific(sa_addr->sa.sa_family); |
1110 | af->to_sk_daddr(sa_addr, sk); | |
8de8c873 | 1111 | sk->sk_err = 0; |
3f7a87d2 | 1112 | |
f50f95ca VY |
1113 | /* in-kernel sockets don't generally have a file allocated to them |
1114 | * if all they do is call sock_create_kern(). | |
1115 | */ | |
1116 | if (sk->sk_socket->file) | |
1117 | f_flags = sk->sk_socket->file->f_flags; | |
1118 | ||
1119 | timeo = sock_sndtimeo(sk, f_flags & O_NONBLOCK); | |
1120 | ||
3f7a87d2 | 1121 | err = sctp_wait_for_connect(asoc, &timeo); |
88a0a948 VY |
1122 | if (!err && assoc_id) |
1123 | *assoc_id = asoc->assoc_id; | |
3f7a87d2 FF |
1124 | |
1125 | /* Don't free association on exit. */ | |
1126 | asoc = NULL; | |
1127 | ||
1128 | out_free: | |
1129 | ||
1130 | SCTP_DEBUG_PRINTK("About to exit __sctp_connect() free asoc: %p" | |
d808ad9a YH |
1131 | " kaddrs: %p err: %d\n", |
1132 | asoc, kaddrs, err); | |
3f7a87d2 FF |
1133 | if (asoc) |
1134 | sctp_association_free(asoc); | |
1135 | return err; | |
1136 | } | |
1137 | ||
1138 | /* Helper for tunneling sctp_connectx() requests through sctp_setsockopt() | |
1139 | * | |
1140 | * API 8.9 | |
88a0a948 VY |
1141 | * int sctp_connectx(int sd, struct sockaddr *addrs, int addrcnt, |
1142 | * sctp_assoc_t *asoc); | |
3f7a87d2 FF |
1143 | * |
1144 | * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses. | |
1145 | * If the sd is an IPv6 socket, the addresses passed can either be IPv4 | |
1146 | * or IPv6 addresses. | |
1147 | * | |
1148 | * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see | |
1149 | * Section 3.1.2 for this usage. | |
1150 | * | |
1151 | * addrs is a pointer to an array of one or more socket addresses. Each | |
1152 | * address is contained in its appropriate structure (i.e. struct | |
1153 | * sockaddr_in or struct sockaddr_in6) the family of the address type | |
1154 | * must be used to distengish the address length (note that this | |
1155 | * representation is termed a "packed array" of addresses). The caller | |
1156 | * specifies the number of addresses in the array with addrcnt. | |
1157 | * | |
88a0a948 VY |
1158 | * On success, sctp_connectx() returns 0. It also sets the assoc_id to |
1159 | * the association id of the new association. On failure, sctp_connectx() | |
1160 | * returns -1, and sets errno to the appropriate error code. The assoc_id | |
1161 | * is not touched by the kernel. | |
3f7a87d2 FF |
1162 | * |
1163 | * For SCTP, the port given in each socket address must be the same, or | |
1164 | * sctp_connectx() will fail, setting errno to EINVAL. | |
1165 | * | |
1166 | * An application can use sctp_connectx to initiate an association with | |
1167 | * an endpoint that is multi-homed. Much like sctp_bindx() this call | |
1168 | * allows a caller to specify multiple addresses at which a peer can be | |
1169 | * reached. The way the SCTP stack uses the list of addresses to set up | |
1170 | * the association is implementation dependant. This function only | |
1171 | * specifies that the stack will try to make use of all the addresses in | |
1172 | * the list when needed. | |
1173 | * | |
1174 | * Note that the list of addresses passed in is only used for setting up | |
1175 | * the association. It does not necessarily equal the set of addresses | |
1176 | * the peer uses for the resulting association. If the caller wants to | |
1177 | * find out the set of peer addresses, it must use sctp_getpaddrs() to | |
1178 | * retrieve them after the association has been set up. | |
1179 | * | |
1180 | * Basically do nothing but copying the addresses from user to kernel | |
1181 | * land and invoking either sctp_connectx(). This is used for tunneling | |
1182 | * the sctp_connectx() request through sctp_setsockopt() from userspace. | |
1183 | * | |
1184 | * We don't use copy_from_user() for optimization: we first do the | |
1185 | * sanity checks (buffer size -fast- and access check-healthy | |
1186 | * pointer); if all of those succeed, then we can alloc the memory | |
1187 | * (expensive operation) needed to copy the data to kernel. Then we do | |
1188 | * the copying without checking the user space area | |
1189 | * (__copy_from_user()). | |
1190 | * | |
1191 | * On exit there is no need to do sockfd_put(), sys_setsockopt() does | |
1192 | * it. | |
1193 | * | |
1194 | * sk The sk of the socket | |
1195 | * addrs The pointer to the addresses in user land | |
1196 | * addrssize Size of the addrs buffer | |
1197 | * | |
88a0a948 | 1198 | * Returns >=0 if ok, <0 errno code on error. |
3f7a87d2 | 1199 | */ |
88a0a948 | 1200 | SCTP_STATIC int __sctp_setsockopt_connectx(struct sock* sk, |
3f7a87d2 | 1201 | struct sockaddr __user *addrs, |
88a0a948 VY |
1202 | int addrs_size, |
1203 | sctp_assoc_t *assoc_id) | |
3f7a87d2 FF |
1204 | { |
1205 | int err = 0; | |
1206 | struct sockaddr *kaddrs; | |
1207 | ||
1208 | SCTP_DEBUG_PRINTK("%s - sk %p addrs %p addrs_size %d\n", | |
0dc47877 | 1209 | __func__, sk, addrs, addrs_size); |
3f7a87d2 FF |
1210 | |
1211 | if (unlikely(addrs_size <= 0)) | |
1212 | return -EINVAL; | |
1213 | ||
1214 | /* Check the user passed a healthy pointer. */ | |
1215 | if (unlikely(!access_ok(VERIFY_READ, addrs, addrs_size))) | |
1216 | return -EFAULT; | |
1217 | ||
1218 | /* Alloc space for the address array in kernel memory. */ | |
8b3a7005 | 1219 | kaddrs = kmalloc(addrs_size, GFP_KERNEL); |
3f7a87d2 FF |
1220 | if (unlikely(!kaddrs)) |
1221 | return -ENOMEM; | |
1222 | ||
1223 | if (__copy_from_user(kaddrs, addrs, addrs_size)) { | |
1224 | err = -EFAULT; | |
1225 | } else { | |
88a0a948 | 1226 | err = __sctp_connect(sk, kaddrs, addrs_size, assoc_id); |
3f7a87d2 FF |
1227 | } |
1228 | ||
1229 | kfree(kaddrs); | |
88a0a948 | 1230 | |
3f7a87d2 FF |
1231 | return err; |
1232 | } | |
1233 | ||
88a0a948 VY |
1234 | /* |
1235 | * This is an older interface. It's kept for backward compatibility | |
1236 | * to the option that doesn't provide association id. | |
1237 | */ | |
1238 | SCTP_STATIC int sctp_setsockopt_connectx_old(struct sock* sk, | |
1239 | struct sockaddr __user *addrs, | |
1240 | int addrs_size) | |
1241 | { | |
1242 | return __sctp_setsockopt_connectx(sk, addrs, addrs_size, NULL); | |
1243 | } | |
1244 | ||
1245 | /* | |
1246 | * New interface for the API. The since the API is done with a socket | |
1247 | * option, to make it simple we feed back the association id is as a return | |
1248 | * indication to the call. Error is always negative and association id is | |
1249 | * always positive. | |
1250 | */ | |
1251 | SCTP_STATIC int sctp_setsockopt_connectx(struct sock* sk, | |
1252 | struct sockaddr __user *addrs, | |
1253 | int addrs_size) | |
1254 | { | |
1255 | sctp_assoc_t assoc_id = 0; | |
1256 | int err = 0; | |
1257 | ||
1258 | err = __sctp_setsockopt_connectx(sk, addrs, addrs_size, &assoc_id); | |
1259 | ||
1260 | if (err) | |
1261 | return err; | |
1262 | else | |
1263 | return assoc_id; | |
1264 | } | |
1265 | ||
1da177e4 LT |
1266 | /* API 3.1.4 close() - UDP Style Syntax |
1267 | * Applications use close() to perform graceful shutdown (as described in | |
1268 | * Section 10.1 of [SCTP]) on ALL the associations currently represented | |
1269 | * by a UDP-style socket. | |
1270 | * | |
1271 | * The syntax is | |
1272 | * | |
1273 | * ret = close(int sd); | |
1274 | * | |
1275 | * sd - the socket descriptor of the associations to be closed. | |
1276 | * | |
1277 | * To gracefully shutdown a specific association represented by the | |
1278 | * UDP-style socket, an application should use the sendmsg() call, | |
1279 | * passing no user data, but including the appropriate flag in the | |
1280 | * ancillary data (see Section xxxx). | |
1281 | * | |
1282 | * If sd in the close() call is a branched-off socket representing only | |
1283 | * one association, the shutdown is performed on that association only. | |
1284 | * | |
1285 | * 4.1.6 close() - TCP Style Syntax | |
1286 | * | |
1287 | * Applications use close() to gracefully close down an association. | |
1288 | * | |
1289 | * The syntax is: | |
1290 | * | |
1291 | * int close(int sd); | |
1292 | * | |
1293 | * sd - the socket descriptor of the association to be closed. | |
1294 | * | |
1295 | * After an application calls close() on a socket descriptor, no further | |
1296 | * socket operations will succeed on that descriptor. | |
1297 | * | |
1298 | * API 7.1.4 SO_LINGER | |
1299 | * | |
1300 | * An application using the TCP-style socket can use this option to | |
1301 | * perform the SCTP ABORT primitive. The linger option structure is: | |
1302 | * | |
1303 | * struct linger { | |
1304 | * int l_onoff; // option on/off | |
1305 | * int l_linger; // linger time | |
1306 | * }; | |
1307 | * | |
1308 | * To enable the option, set l_onoff to 1. If the l_linger value is set | |
1309 | * to 0, calling close() is the same as the ABORT primitive. If the | |
1310 | * value is set to a negative value, the setsockopt() call will return | |
1311 | * an error. If the value is set to a positive value linger_time, the | |
1312 | * close() can be blocked for at most linger_time ms. If the graceful | |
1313 | * shutdown phase does not finish during this period, close() will | |
1314 | * return but the graceful shutdown phase continues in the system. | |
1315 | */ | |
1316 | SCTP_STATIC void sctp_close(struct sock *sk, long timeout) | |
1317 | { | |
1318 | struct sctp_endpoint *ep; | |
1319 | struct sctp_association *asoc; | |
1320 | struct list_head *pos, *temp; | |
1321 | ||
1322 | SCTP_DEBUG_PRINTK("sctp_close(sk: 0x%p, timeout:%ld)\n", sk, timeout); | |
1323 | ||
1324 | sctp_lock_sock(sk); | |
1325 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1326 | ||
1327 | ep = sctp_sk(sk)->ep; | |
1328 | ||
61c9fed4 | 1329 | /* Walk all associations on an endpoint. */ |
1da177e4 LT |
1330 | list_for_each_safe(pos, temp, &ep->asocs) { |
1331 | asoc = list_entry(pos, struct sctp_association, asocs); | |
1332 | ||
1333 | if (sctp_style(sk, TCP)) { | |
1334 | /* A closed association can still be in the list if | |
1335 | * it belongs to a TCP-style listening socket that is | |
1336 | * not yet accepted. If so, free it. If not, send an | |
1337 | * ABORT or SHUTDOWN based on the linger options. | |
1338 | */ | |
1339 | if (sctp_state(asoc, CLOSED)) { | |
1340 | sctp_unhash_established(asoc); | |
1341 | sctp_association_free(asoc); | |
b89498a1 VY |
1342 | continue; |
1343 | } | |
1344 | } | |
1da177e4 | 1345 | |
b9ac8672 SS |
1346 | if (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime) { |
1347 | struct sctp_chunk *chunk; | |
1348 | ||
1349 | chunk = sctp_make_abort_user(asoc, NULL, 0); | |
1350 | if (chunk) | |
1351 | sctp_primitive_ABORT(asoc, chunk); | |
1352 | } else | |
1da177e4 LT |
1353 | sctp_primitive_SHUTDOWN(asoc, NULL); |
1354 | } | |
1355 | ||
1356 | /* Clean up any skbs sitting on the receive queue. */ | |
1357 | sctp_queue_purge_ulpevents(&sk->sk_receive_queue); | |
1358 | sctp_queue_purge_ulpevents(&sctp_sk(sk)->pd_lobby); | |
1359 | ||
1360 | /* On a TCP-style socket, block for at most linger_time if set. */ | |
1361 | if (sctp_style(sk, TCP) && timeout) | |
1362 | sctp_wait_for_close(sk, timeout); | |
1363 | ||
1364 | /* This will run the backlog queue. */ | |
1365 | sctp_release_sock(sk); | |
1366 | ||
1367 | /* Supposedly, no process has access to the socket, but | |
1368 | * the net layers still may. | |
1369 | */ | |
1370 | sctp_local_bh_disable(); | |
1371 | sctp_bh_lock_sock(sk); | |
1372 | ||
1373 | /* Hold the sock, since sk_common_release() will put sock_put() | |
1374 | * and we have just a little more cleanup. | |
1375 | */ | |
1376 | sock_hold(sk); | |
1377 | sk_common_release(sk); | |
1378 | ||
1379 | sctp_bh_unlock_sock(sk); | |
1380 | sctp_local_bh_enable(); | |
1381 | ||
1382 | sock_put(sk); | |
1383 | ||
1384 | SCTP_DBG_OBJCNT_DEC(sock); | |
1385 | } | |
1386 | ||
1387 | /* Handle EPIPE error. */ | |
1388 | static int sctp_error(struct sock *sk, int flags, int err) | |
1389 | { | |
1390 | if (err == -EPIPE) | |
1391 | err = sock_error(sk) ? : -EPIPE; | |
1392 | if (err == -EPIPE && !(flags & MSG_NOSIGNAL)) | |
1393 | send_sig(SIGPIPE, current, 0); | |
1394 | return err; | |
1395 | } | |
1396 | ||
1397 | /* API 3.1.3 sendmsg() - UDP Style Syntax | |
1398 | * | |
1399 | * An application uses sendmsg() and recvmsg() calls to transmit data to | |
1400 | * and receive data from its peer. | |
1401 | * | |
1402 | * ssize_t sendmsg(int socket, const struct msghdr *message, | |
1403 | * int flags); | |
1404 | * | |
1405 | * socket - the socket descriptor of the endpoint. | |
1406 | * message - pointer to the msghdr structure which contains a single | |
1407 | * user message and possibly some ancillary data. | |
1408 | * | |
1409 | * See Section 5 for complete description of the data | |
1410 | * structures. | |
1411 | * | |
1412 | * flags - flags sent or received with the user message, see Section | |
1413 | * 5 for complete description of the flags. | |
1414 | * | |
1415 | * Note: This function could use a rewrite especially when explicit | |
1416 | * connect support comes in. | |
1417 | */ | |
1418 | /* BUG: We do not implement the equivalent of sk_stream_wait_memory(). */ | |
1419 | ||
1420 | SCTP_STATIC int sctp_msghdr_parse(const struct msghdr *, sctp_cmsgs_t *); | |
1421 | ||
1422 | SCTP_STATIC int sctp_sendmsg(struct kiocb *iocb, struct sock *sk, | |
1423 | struct msghdr *msg, size_t msg_len) | |
1424 | { | |
1425 | struct sctp_sock *sp; | |
1426 | struct sctp_endpoint *ep; | |
1427 | struct sctp_association *new_asoc=NULL, *asoc=NULL; | |
1428 | struct sctp_transport *transport, *chunk_tp; | |
1429 | struct sctp_chunk *chunk; | |
dce116ae | 1430 | union sctp_addr to; |
1da177e4 LT |
1431 | struct sockaddr *msg_name = NULL; |
1432 | struct sctp_sndrcvinfo default_sinfo = { 0 }; | |
1433 | struct sctp_sndrcvinfo *sinfo; | |
1434 | struct sctp_initmsg *sinit; | |
1435 | sctp_assoc_t associd = 0; | |
1436 | sctp_cmsgs_t cmsgs = { NULL }; | |
1437 | int err; | |
1438 | sctp_scope_t scope; | |
1439 | long timeo; | |
1440 | __u16 sinfo_flags = 0; | |
1441 | struct sctp_datamsg *datamsg; | |
1da177e4 LT |
1442 | int msg_flags = msg->msg_flags; |
1443 | ||
1444 | SCTP_DEBUG_PRINTK("sctp_sendmsg(sk: %p, msg: %p, msg_len: %zu)\n", | |
1445 | sk, msg, msg_len); | |
1446 | ||
1447 | err = 0; | |
1448 | sp = sctp_sk(sk); | |
1449 | ep = sp->ep; | |
1450 | ||
3f7a87d2 | 1451 | SCTP_DEBUG_PRINTK("Using endpoint: %p.\n", ep); |
1da177e4 LT |
1452 | |
1453 | /* We cannot send a message over a TCP-style listening socket. */ | |
1454 | if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING)) { | |
1455 | err = -EPIPE; | |
1456 | goto out_nounlock; | |
1457 | } | |
1458 | ||
1459 | /* Parse out the SCTP CMSGs. */ | |
1460 | err = sctp_msghdr_parse(msg, &cmsgs); | |
1461 | ||
1462 | if (err) { | |
1463 | SCTP_DEBUG_PRINTK("msghdr parse err = %x\n", err); | |
1464 | goto out_nounlock; | |
1465 | } | |
1466 | ||
1467 | /* Fetch the destination address for this packet. This | |
1468 | * address only selects the association--it is not necessarily | |
1469 | * the address we will send to. | |
1470 | * For a peeled-off socket, msg_name is ignored. | |
1471 | */ | |
1472 | if (!sctp_style(sk, UDP_HIGH_BANDWIDTH) && msg->msg_name) { | |
1473 | int msg_namelen = msg->msg_namelen; | |
1474 | ||
1475 | err = sctp_verify_addr(sk, (union sctp_addr *)msg->msg_name, | |
1476 | msg_namelen); | |
1477 | if (err) | |
1478 | return err; | |
1479 | ||
1480 | if (msg_namelen > sizeof(to)) | |
1481 | msg_namelen = sizeof(to); | |
1482 | memcpy(&to, msg->msg_name, msg_namelen); | |
1da177e4 LT |
1483 | msg_name = msg->msg_name; |
1484 | } | |
1485 | ||
1486 | sinfo = cmsgs.info; | |
1487 | sinit = cmsgs.init; | |
1488 | ||
1489 | /* Did the user specify SNDRCVINFO? */ | |
1490 | if (sinfo) { | |
1491 | sinfo_flags = sinfo->sinfo_flags; | |
1492 | associd = sinfo->sinfo_assoc_id; | |
1493 | } | |
1494 | ||
1495 | SCTP_DEBUG_PRINTK("msg_len: %zu, sinfo_flags: 0x%x\n", | |
1496 | msg_len, sinfo_flags); | |
1497 | ||
eaa5c54d ISJ |
1498 | /* SCTP_EOF or SCTP_ABORT cannot be set on a TCP-style socket. */ |
1499 | if (sctp_style(sk, TCP) && (sinfo_flags & (SCTP_EOF | SCTP_ABORT))) { | |
1da177e4 LT |
1500 | err = -EINVAL; |
1501 | goto out_nounlock; | |
1502 | } | |
1503 | ||
eaa5c54d ISJ |
1504 | /* If SCTP_EOF is set, no data can be sent. Disallow sending zero |
1505 | * length messages when SCTP_EOF|SCTP_ABORT is not set. | |
1506 | * If SCTP_ABORT is set, the message length could be non zero with | |
1da177e4 | 1507 | * the msg_iov set to the user abort reason. |
d808ad9a | 1508 | */ |
eaa5c54d ISJ |
1509 | if (((sinfo_flags & SCTP_EOF) && (msg_len > 0)) || |
1510 | (!(sinfo_flags & (SCTP_EOF|SCTP_ABORT)) && (msg_len == 0))) { | |
1da177e4 LT |
1511 | err = -EINVAL; |
1512 | goto out_nounlock; | |
1513 | } | |
1514 | ||
eaa5c54d | 1515 | /* If SCTP_ADDR_OVER is set, there must be an address |
1da177e4 LT |
1516 | * specified in msg_name. |
1517 | */ | |
eaa5c54d | 1518 | if ((sinfo_flags & SCTP_ADDR_OVER) && (!msg->msg_name)) { |
1da177e4 LT |
1519 | err = -EINVAL; |
1520 | goto out_nounlock; | |
1521 | } | |
1522 | ||
1523 | transport = NULL; | |
1524 | ||
1525 | SCTP_DEBUG_PRINTK("About to look up association.\n"); | |
1526 | ||
1527 | sctp_lock_sock(sk); | |
1528 | ||
1529 | /* If a msg_name has been specified, assume this is to be used. */ | |
1530 | if (msg_name) { | |
1531 | /* Look for a matching association on the endpoint. */ | |
dce116ae | 1532 | asoc = sctp_endpoint_lookup_assoc(ep, &to, &transport); |
1da177e4 LT |
1533 | if (!asoc) { |
1534 | /* If we could not find a matching association on the | |
1535 | * endpoint, make sure that it is not a TCP-style | |
1536 | * socket that already has an association or there is | |
1537 | * no peeled-off association on another socket. | |
1538 | */ | |
1539 | if ((sctp_style(sk, TCP) && | |
1540 | sctp_sstate(sk, ESTABLISHED)) || | |
dce116ae | 1541 | sctp_endpoint_is_peeled_off(ep, &to)) { |
1da177e4 LT |
1542 | err = -EADDRNOTAVAIL; |
1543 | goto out_unlock; | |
1544 | } | |
1545 | } | |
1546 | } else { | |
1547 | asoc = sctp_id2assoc(sk, associd); | |
1548 | if (!asoc) { | |
1549 | err = -EPIPE; | |
1550 | goto out_unlock; | |
1551 | } | |
1552 | } | |
1553 | ||
1554 | if (asoc) { | |
1555 | SCTP_DEBUG_PRINTK("Just looked up association: %p.\n", asoc); | |
1556 | ||
1557 | /* We cannot send a message on a TCP-style SCTP_SS_ESTABLISHED | |
1558 | * socket that has an association in CLOSED state. This can | |
1559 | * happen when an accepted socket has an association that is | |
1560 | * already CLOSED. | |
1561 | */ | |
1562 | if (sctp_state(asoc, CLOSED) && sctp_style(sk, TCP)) { | |
1563 | err = -EPIPE; | |
1564 | goto out_unlock; | |
1565 | } | |
1566 | ||
eaa5c54d | 1567 | if (sinfo_flags & SCTP_EOF) { |
1da177e4 LT |
1568 | SCTP_DEBUG_PRINTK("Shutting down association: %p\n", |
1569 | asoc); | |
1570 | sctp_primitive_SHUTDOWN(asoc, NULL); | |
1571 | err = 0; | |
1572 | goto out_unlock; | |
1573 | } | |
eaa5c54d | 1574 | if (sinfo_flags & SCTP_ABORT) { |
c164a9ba SS |
1575 | |
1576 | chunk = sctp_make_abort_user(asoc, msg, msg_len); | |
1577 | if (!chunk) { | |
1578 | err = -ENOMEM; | |
1579 | goto out_unlock; | |
1580 | } | |
1581 | ||
1da177e4 | 1582 | SCTP_DEBUG_PRINTK("Aborting association: %p\n", asoc); |
c164a9ba | 1583 | sctp_primitive_ABORT(asoc, chunk); |
1da177e4 LT |
1584 | err = 0; |
1585 | goto out_unlock; | |
1586 | } | |
1587 | } | |
1588 | ||
1589 | /* Do we need to create the association? */ | |
1590 | if (!asoc) { | |
1591 | SCTP_DEBUG_PRINTK("There is no association yet.\n"); | |
1592 | ||
eaa5c54d | 1593 | if (sinfo_flags & (SCTP_EOF | SCTP_ABORT)) { |
1da177e4 LT |
1594 | err = -EINVAL; |
1595 | goto out_unlock; | |
1596 | } | |
1597 | ||
1598 | /* Check for invalid stream against the stream counts, | |
1599 | * either the default or the user specified stream counts. | |
1600 | */ | |
1601 | if (sinfo) { | |
1602 | if (!sinit || (sinit && !sinit->sinit_num_ostreams)) { | |
1603 | /* Check against the defaults. */ | |
1604 | if (sinfo->sinfo_stream >= | |
1605 | sp->initmsg.sinit_num_ostreams) { | |
1606 | err = -EINVAL; | |
1607 | goto out_unlock; | |
1608 | } | |
1609 | } else { | |
1610 | /* Check against the requested. */ | |
1611 | if (sinfo->sinfo_stream >= | |
1612 | sinit->sinit_num_ostreams) { | |
1613 | err = -EINVAL; | |
1614 | goto out_unlock; | |
1615 | } | |
1616 | } | |
1617 | } | |
1618 | ||
1619 | /* | |
1620 | * API 3.1.2 bind() - UDP Style Syntax | |
1621 | * If a bind() or sctp_bindx() is not called prior to a | |
1622 | * sendmsg() call that initiates a new association, the | |
1623 | * system picks an ephemeral port and will choose an address | |
1624 | * set equivalent to binding with a wildcard address. | |
1625 | */ | |
1626 | if (!ep->base.bind_addr.port) { | |
1627 | if (sctp_autobind(sk)) { | |
1628 | err = -EAGAIN; | |
1629 | goto out_unlock; | |
1630 | } | |
64a0c1c8 ISJ |
1631 | } else { |
1632 | /* | |
1633 | * If an unprivileged user inherits a one-to-many | |
1634 | * style socket with open associations on a privileged | |
1635 | * port, it MAY be permitted to accept new associations, | |
1636 | * but it SHOULD NOT be permitted to open new | |
1637 | * associations. | |
1638 | */ | |
1639 | if (ep->base.bind_addr.port < PROT_SOCK && | |
1640 | !capable(CAP_NET_BIND_SERVICE)) { | |
1641 | err = -EACCES; | |
1642 | goto out_unlock; | |
1643 | } | |
1da177e4 LT |
1644 | } |
1645 | ||
1646 | scope = sctp_scope(&to); | |
1647 | new_asoc = sctp_association_new(ep, sk, scope, GFP_KERNEL); | |
1648 | if (!new_asoc) { | |
1649 | err = -ENOMEM; | |
1650 | goto out_unlock; | |
1651 | } | |
1652 | asoc = new_asoc; | |
1653 | ||
1654 | /* If the SCTP_INIT ancillary data is specified, set all | |
1655 | * the association init values accordingly. | |
1656 | */ | |
1657 | if (sinit) { | |
1658 | if (sinit->sinit_num_ostreams) { | |
1659 | asoc->c.sinit_num_ostreams = | |
1660 | sinit->sinit_num_ostreams; | |
1661 | } | |
1662 | if (sinit->sinit_max_instreams) { | |
1663 | asoc->c.sinit_max_instreams = | |
1664 | sinit->sinit_max_instreams; | |
1665 | } | |
1666 | if (sinit->sinit_max_attempts) { | |
1667 | asoc->max_init_attempts | |
1668 | = sinit->sinit_max_attempts; | |
1669 | } | |
1670 | if (sinit->sinit_max_init_timeo) { | |
d808ad9a | 1671 | asoc->max_init_timeo = |
1da177e4 LT |
1672 | msecs_to_jiffies(sinit->sinit_max_init_timeo); |
1673 | } | |
1674 | } | |
1675 | ||
1676 | /* Prime the peer's transport structures. */ | |
dce116ae | 1677 | transport = sctp_assoc_add_peer(asoc, &to, GFP_KERNEL, SCTP_UNKNOWN); |
1da177e4 LT |
1678 | if (!transport) { |
1679 | err = -ENOMEM; | |
1680 | goto out_free; | |
1681 | } | |
1682 | err = sctp_assoc_set_bind_addr_from_ep(asoc, GFP_KERNEL); | |
1683 | if (err < 0) { | |
1684 | err = -ENOMEM; | |
1685 | goto out_free; | |
1686 | } | |
1687 | } | |
1688 | ||
1689 | /* ASSERT: we have a valid association at this point. */ | |
1690 | SCTP_DEBUG_PRINTK("We have a valid association.\n"); | |
1691 | ||
1692 | if (!sinfo) { | |
1693 | /* If the user didn't specify SNDRCVINFO, make up one with | |
1694 | * some defaults. | |
1695 | */ | |
1696 | default_sinfo.sinfo_stream = asoc->default_stream; | |
1697 | default_sinfo.sinfo_flags = asoc->default_flags; | |
1698 | default_sinfo.sinfo_ppid = asoc->default_ppid; | |
1699 | default_sinfo.sinfo_context = asoc->default_context; | |
1700 | default_sinfo.sinfo_timetolive = asoc->default_timetolive; | |
1701 | default_sinfo.sinfo_assoc_id = sctp_assoc2id(asoc); | |
1702 | sinfo = &default_sinfo; | |
1703 | } | |
1704 | ||
1705 | /* API 7.1.7, the sndbuf size per association bounds the | |
1706 | * maximum size of data that can be sent in a single send call. | |
1707 | */ | |
1708 | if (msg_len > sk->sk_sndbuf) { | |
1709 | err = -EMSGSIZE; | |
1710 | goto out_free; | |
1711 | } | |
1712 | ||
8a479491 VY |
1713 | if (asoc->pmtu_pending) |
1714 | sctp_assoc_pending_pmtu(asoc); | |
1715 | ||
1da177e4 LT |
1716 | /* If fragmentation is disabled and the message length exceeds the |
1717 | * association fragmentation point, return EMSGSIZE. The I-D | |
1718 | * does not specify what this error is, but this looks like | |
1719 | * a great fit. | |
1720 | */ | |
1721 | if (sctp_sk(sk)->disable_fragments && (msg_len > asoc->frag_point)) { | |
1722 | err = -EMSGSIZE; | |
1723 | goto out_free; | |
1724 | } | |
1725 | ||
1726 | if (sinfo) { | |
1727 | /* Check for invalid stream. */ | |
1728 | if (sinfo->sinfo_stream >= asoc->c.sinit_num_ostreams) { | |
1729 | err = -EINVAL; | |
1730 | goto out_free; | |
1731 | } | |
1732 | } | |
1733 | ||
1734 | timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT); | |
1735 | if (!sctp_wspace(asoc)) { | |
1736 | err = sctp_wait_for_sndbuf(asoc, &timeo, msg_len); | |
1737 | if (err) | |
1738 | goto out_free; | |
1739 | } | |
1740 | ||
1741 | /* If an address is passed with the sendto/sendmsg call, it is used | |
1742 | * to override the primary destination address in the TCP model, or | |
eaa5c54d | 1743 | * when SCTP_ADDR_OVER flag is set in the UDP model. |
1da177e4 LT |
1744 | */ |
1745 | if ((sctp_style(sk, TCP) && msg_name) || | |
eaa5c54d | 1746 | (sinfo_flags & SCTP_ADDR_OVER)) { |
dce116ae | 1747 | chunk_tp = sctp_assoc_lookup_paddr(asoc, &to); |
1da177e4 LT |
1748 | if (!chunk_tp) { |
1749 | err = -EINVAL; | |
1750 | goto out_free; | |
1751 | } | |
1752 | } else | |
1753 | chunk_tp = NULL; | |
1754 | ||
1755 | /* Auto-connect, if we aren't connected already. */ | |
1756 | if (sctp_state(asoc, CLOSED)) { | |
1757 | err = sctp_primitive_ASSOCIATE(asoc, NULL); | |
1758 | if (err < 0) | |
1759 | goto out_free; | |
1760 | SCTP_DEBUG_PRINTK("We associated primitively.\n"); | |
1761 | } | |
1762 | ||
1763 | /* Break the message into multiple chunks of maximum size. */ | |
1764 | datamsg = sctp_datamsg_from_user(asoc, sinfo, msg, msg_len); | |
1765 | if (!datamsg) { | |
1766 | err = -ENOMEM; | |
1767 | goto out_free; | |
1768 | } | |
1769 | ||
1770 | /* Now send the (possibly) fragmented message. */ | |
9dbc15f0 | 1771 | list_for_each_entry(chunk, &datamsg->chunks, frag_list) { |
80445cfb | 1772 | sctp_chunk_hold(chunk); |
1da177e4 LT |
1773 | |
1774 | /* Do accounting for the write space. */ | |
1775 | sctp_set_owner_w(chunk); | |
1776 | ||
1777 | chunk->transport = chunk_tp; | |
1778 | ||
1779 | /* Send it to the lower layers. Note: all chunks | |
1780 | * must either fail or succeed. The lower layer | |
1781 | * works that way today. Keep it that way or this | |
1782 | * breaks. | |
1783 | */ | |
1784 | err = sctp_primitive_SEND(asoc, chunk); | |
1785 | /* Did the lower layer accept the chunk? */ | |
1786 | if (err) | |
1787 | sctp_chunk_free(chunk); | |
1788 | SCTP_DEBUG_PRINTK("We sent primitively.\n"); | |
1789 | } | |
1790 | ||
80445cfb | 1791 | sctp_datamsg_put(datamsg); |
1da177e4 LT |
1792 | if (err) |
1793 | goto out_free; | |
1794 | else | |
1795 | err = msg_len; | |
1796 | ||
1797 | /* If we are already past ASSOCIATE, the lower | |
1798 | * layers are responsible for association cleanup. | |
1799 | */ | |
1800 | goto out_unlock; | |
1801 | ||
1802 | out_free: | |
1803 | if (new_asoc) | |
1804 | sctp_association_free(asoc); | |
1805 | out_unlock: | |
1806 | sctp_release_sock(sk); | |
1807 | ||
1808 | out_nounlock: | |
1809 | return sctp_error(sk, msg_flags, err); | |
1810 | ||
1811 | #if 0 | |
1812 | do_sock_err: | |
1813 | if (msg_len) | |
1814 | err = msg_len; | |
1815 | else | |
1816 | err = sock_error(sk); | |
1817 | goto out; | |
1818 | ||
1819 | do_interrupted: | |
1820 | if (msg_len) | |
1821 | err = msg_len; | |
1822 | goto out; | |
1823 | #endif /* 0 */ | |
1824 | } | |
1825 | ||
1826 | /* This is an extended version of skb_pull() that removes the data from the | |
1827 | * start of a skb even when data is spread across the list of skb's in the | |
1828 | * frag_list. len specifies the total amount of data that needs to be removed. | |
1829 | * when 'len' bytes could be removed from the skb, it returns 0. | |
1830 | * If 'len' exceeds the total skb length, it returns the no. of bytes that | |
1831 | * could not be removed. | |
1832 | */ | |
1833 | static int sctp_skb_pull(struct sk_buff *skb, int len) | |
1834 | { | |
1835 | struct sk_buff *list; | |
1836 | int skb_len = skb_headlen(skb); | |
1837 | int rlen; | |
1838 | ||
1839 | if (len <= skb_len) { | |
1840 | __skb_pull(skb, len); | |
1841 | return 0; | |
1842 | } | |
1843 | len -= skb_len; | |
1844 | __skb_pull(skb, skb_len); | |
1845 | ||
1846 | for (list = skb_shinfo(skb)->frag_list; list; list = list->next) { | |
1847 | rlen = sctp_skb_pull(list, len); | |
1848 | skb->len -= (len-rlen); | |
1849 | skb->data_len -= (len-rlen); | |
1850 | ||
1851 | if (!rlen) | |
1852 | return 0; | |
1853 | ||
1854 | len = rlen; | |
1855 | } | |
1856 | ||
1857 | return len; | |
1858 | } | |
1859 | ||
1860 | /* API 3.1.3 recvmsg() - UDP Style Syntax | |
1861 | * | |
1862 | * ssize_t recvmsg(int socket, struct msghdr *message, | |
1863 | * int flags); | |
1864 | * | |
1865 | * socket - the socket descriptor of the endpoint. | |
1866 | * message - pointer to the msghdr structure which contains a single | |
1867 | * user message and possibly some ancillary data. | |
1868 | * | |
1869 | * See Section 5 for complete description of the data | |
1870 | * structures. | |
1871 | * | |
1872 | * flags - flags sent or received with the user message, see Section | |
1873 | * 5 for complete description of the flags. | |
1874 | */ | |
1875 | static struct sk_buff *sctp_skb_recv_datagram(struct sock *, int, int, int *); | |
1876 | ||
1877 | SCTP_STATIC int sctp_recvmsg(struct kiocb *iocb, struct sock *sk, | |
1878 | struct msghdr *msg, size_t len, int noblock, | |
1879 | int flags, int *addr_len) | |
1880 | { | |
1881 | struct sctp_ulpevent *event = NULL; | |
1882 | struct sctp_sock *sp = sctp_sk(sk); | |
1883 | struct sk_buff *skb; | |
1884 | int copied; | |
1885 | int err = 0; | |
1886 | int skb_len; | |
1887 | ||
1888 | SCTP_DEBUG_PRINTK("sctp_recvmsg(%s: %p, %s: %p, %s: %zd, %s: %d, %s: " | |
1889 | "0x%x, %s: %p)\n", "sk", sk, "msghdr", msg, | |
1890 | "len", len, "knoblauch", noblock, | |
1891 | "flags", flags, "addr_len", addr_len); | |
1892 | ||
1893 | sctp_lock_sock(sk); | |
1894 | ||
1895 | if (sctp_style(sk, TCP) && !sctp_sstate(sk, ESTABLISHED)) { | |
1896 | err = -ENOTCONN; | |
1897 | goto out; | |
1898 | } | |
1899 | ||
1900 | skb = sctp_skb_recv_datagram(sk, flags, noblock, &err); | |
1901 | if (!skb) | |
1902 | goto out; | |
1903 | ||
1904 | /* Get the total length of the skb including any skb's in the | |
1905 | * frag_list. | |
1906 | */ | |
1907 | skb_len = skb->len; | |
1908 | ||
1909 | copied = skb_len; | |
1910 | if (copied > len) | |
1911 | copied = len; | |
1912 | ||
1913 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
1914 | ||
1915 | event = sctp_skb2event(skb); | |
1916 | ||
1917 | if (err) | |
1918 | goto out_free; | |
1919 | ||
1920 | sock_recv_timestamp(msg, sk, skb); | |
1921 | if (sctp_ulpevent_is_notification(event)) { | |
1922 | msg->msg_flags |= MSG_NOTIFICATION; | |
1923 | sp->pf->event_msgname(event, msg->msg_name, addr_len); | |
1924 | } else { | |
1925 | sp->pf->skb_msgname(skb, msg->msg_name, addr_len); | |
1926 | } | |
1927 | ||
1928 | /* Check if we allow SCTP_SNDRCVINFO. */ | |
1929 | if (sp->subscribe.sctp_data_io_event) | |
1930 | sctp_ulpevent_read_sndrcvinfo(event, msg); | |
1931 | #if 0 | |
1932 | /* FIXME: we should be calling IP/IPv6 layers. */ | |
1933 | if (sk->sk_protinfo.af_inet.cmsg_flags) | |
1934 | ip_cmsg_recv(msg, skb); | |
1935 | #endif | |
1936 | ||
1937 | err = copied; | |
1938 | ||
1939 | /* If skb's length exceeds the user's buffer, update the skb and | |
1940 | * push it back to the receive_queue so that the next call to | |
1941 | * recvmsg() will return the remaining data. Don't set MSG_EOR. | |
1942 | */ | |
1943 | if (skb_len > copied) { | |
1944 | msg->msg_flags &= ~MSG_EOR; | |
1945 | if (flags & MSG_PEEK) | |
1946 | goto out_free; | |
1947 | sctp_skb_pull(skb, copied); | |
1948 | skb_queue_head(&sk->sk_receive_queue, skb); | |
1949 | ||
1950 | /* When only partial message is copied to the user, increase | |
1951 | * rwnd by that amount. If all the data in the skb is read, | |
1952 | * rwnd is updated when the event is freed. | |
1953 | */ | |
0eca8fee VY |
1954 | if (!sctp_ulpevent_is_notification(event)) |
1955 | sctp_assoc_rwnd_increase(event->asoc, copied); | |
1da177e4 LT |
1956 | goto out; |
1957 | } else if ((event->msg_flags & MSG_NOTIFICATION) || | |
1958 | (event->msg_flags & MSG_EOR)) | |
1959 | msg->msg_flags |= MSG_EOR; | |
1960 | else | |
1961 | msg->msg_flags &= ~MSG_EOR; | |
1962 | ||
1963 | out_free: | |
1964 | if (flags & MSG_PEEK) { | |
1965 | /* Release the skb reference acquired after peeking the skb in | |
1966 | * sctp_skb_recv_datagram(). | |
1967 | */ | |
1968 | kfree_skb(skb); | |
1969 | } else { | |
1970 | /* Free the event which includes releasing the reference to | |
1971 | * the owner of the skb, freeing the skb and updating the | |
1972 | * rwnd. | |
1973 | */ | |
1974 | sctp_ulpevent_free(event); | |
1975 | } | |
1976 | out: | |
1977 | sctp_release_sock(sk); | |
1978 | return err; | |
1979 | } | |
1980 | ||
1981 | /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS) | |
1982 | * | |
1983 | * This option is a on/off flag. If enabled no SCTP message | |
1984 | * fragmentation will be performed. Instead if a message being sent | |
1985 | * exceeds the current PMTU size, the message will NOT be sent and | |
1986 | * instead a error will be indicated to the user. | |
1987 | */ | |
1988 | static int sctp_setsockopt_disable_fragments(struct sock *sk, | |
1989 | char __user *optval, int optlen) | |
1990 | { | |
1991 | int val; | |
1992 | ||
1993 | if (optlen < sizeof(int)) | |
1994 | return -EINVAL; | |
1995 | ||
1996 | if (get_user(val, (int __user *)optval)) | |
1997 | return -EFAULT; | |
1998 | ||
1999 | sctp_sk(sk)->disable_fragments = (val == 0) ? 0 : 1; | |
2000 | ||
2001 | return 0; | |
2002 | } | |
2003 | ||
2004 | static int sctp_setsockopt_events(struct sock *sk, char __user *optval, | |
2005 | int optlen) | |
2006 | { | |
7e8616d8 | 2007 | if (optlen > sizeof(struct sctp_event_subscribe)) |
1da177e4 LT |
2008 | return -EINVAL; |
2009 | if (copy_from_user(&sctp_sk(sk)->subscribe, optval, optlen)) | |
2010 | return -EFAULT; | |
2011 | return 0; | |
2012 | } | |
2013 | ||
2014 | /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE) | |
2015 | * | |
2016 | * This socket option is applicable to the UDP-style socket only. When | |
2017 | * set it will cause associations that are idle for more than the | |
2018 | * specified number of seconds to automatically close. An association | |
2019 | * being idle is defined an association that has NOT sent or received | |
2020 | * user data. The special value of '0' indicates that no automatic | |
2021 | * close of any associations should be performed. The option expects an | |
2022 | * integer defining the number of seconds of idle time before an | |
2023 | * association is closed. | |
2024 | */ | |
2025 | static int sctp_setsockopt_autoclose(struct sock *sk, char __user *optval, | |
2026 | int optlen) | |
2027 | { | |
2028 | struct sctp_sock *sp = sctp_sk(sk); | |
2029 | ||
2030 | /* Applicable to UDP-style socket only */ | |
2031 | if (sctp_style(sk, TCP)) | |
2032 | return -EOPNOTSUPP; | |
2033 | if (optlen != sizeof(int)) | |
2034 | return -EINVAL; | |
2035 | if (copy_from_user(&sp->autoclose, optval, optlen)) | |
2036 | return -EFAULT; | |
2037 | ||
1da177e4 LT |
2038 | return 0; |
2039 | } | |
2040 | ||
2041 | /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS) | |
2042 | * | |
2043 | * Applications can enable or disable heartbeats for any peer address of | |
2044 | * an association, modify an address's heartbeat interval, force a | |
2045 | * heartbeat to be sent immediately, and adjust the address's maximum | |
2046 | * number of retransmissions sent before an address is considered | |
2047 | * unreachable. The following structure is used to access and modify an | |
2048 | * address's parameters: | |
2049 | * | |
2050 | * struct sctp_paddrparams { | |
52ccb8e9 FF |
2051 | * sctp_assoc_t spp_assoc_id; |
2052 | * struct sockaddr_storage spp_address; | |
2053 | * uint32_t spp_hbinterval; | |
2054 | * uint16_t spp_pathmaxrxt; | |
2055 | * uint32_t spp_pathmtu; | |
2056 | * uint32_t spp_sackdelay; | |
2057 | * uint32_t spp_flags; | |
2058 | * }; | |
2059 | * | |
2060 | * spp_assoc_id - (one-to-many style socket) This is filled in the | |
2061 | * application, and identifies the association for | |
2062 | * this query. | |
1da177e4 LT |
2063 | * spp_address - This specifies which address is of interest. |
2064 | * spp_hbinterval - This contains the value of the heartbeat interval, | |
52ccb8e9 FF |
2065 | * in milliseconds. If a value of zero |
2066 | * is present in this field then no changes are to | |
2067 | * be made to this parameter. | |
1da177e4 LT |
2068 | * spp_pathmaxrxt - This contains the maximum number of |
2069 | * retransmissions before this address shall be | |
52ccb8e9 FF |
2070 | * considered unreachable. If a value of zero |
2071 | * is present in this field then no changes are to | |
2072 | * be made to this parameter. | |
2073 | * spp_pathmtu - When Path MTU discovery is disabled the value | |
2074 | * specified here will be the "fixed" path mtu. | |
2075 | * Note that if the spp_address field is empty | |
2076 | * then all associations on this address will | |
2077 | * have this fixed path mtu set upon them. | |
2078 | * | |
2079 | * spp_sackdelay - When delayed sack is enabled, this value specifies | |
2080 | * the number of milliseconds that sacks will be delayed | |
2081 | * for. This value will apply to all addresses of an | |
2082 | * association if the spp_address field is empty. Note | |
2083 | * also, that if delayed sack is enabled and this | |
2084 | * value is set to 0, no change is made to the last | |
2085 | * recorded delayed sack timer value. | |
2086 | * | |
2087 | * spp_flags - These flags are used to control various features | |
2088 | * on an association. The flag field may contain | |
2089 | * zero or more of the following options. | |
2090 | * | |
2091 | * SPP_HB_ENABLE - Enable heartbeats on the | |
2092 | * specified address. Note that if the address | |
2093 | * field is empty all addresses for the association | |
2094 | * have heartbeats enabled upon them. | |
2095 | * | |
2096 | * SPP_HB_DISABLE - Disable heartbeats on the | |
2097 | * speicifed address. Note that if the address | |
2098 | * field is empty all addresses for the association | |
2099 | * will have their heartbeats disabled. Note also | |
2100 | * that SPP_HB_ENABLE and SPP_HB_DISABLE are | |
2101 | * mutually exclusive, only one of these two should | |
2102 | * be specified. Enabling both fields will have | |
2103 | * undetermined results. | |
2104 | * | |
2105 | * SPP_HB_DEMAND - Request a user initiated heartbeat | |
2106 | * to be made immediately. | |
2107 | * | |
bdf3092a VY |
2108 | * SPP_HB_TIME_IS_ZERO - Specify's that the time for |
2109 | * heartbeat delayis to be set to the value of 0 | |
2110 | * milliseconds. | |
2111 | * | |
52ccb8e9 FF |
2112 | * SPP_PMTUD_ENABLE - This field will enable PMTU |
2113 | * discovery upon the specified address. Note that | |
2114 | * if the address feild is empty then all addresses | |
2115 | * on the association are effected. | |
2116 | * | |
2117 | * SPP_PMTUD_DISABLE - This field will disable PMTU | |
2118 | * discovery upon the specified address. Note that | |
2119 | * if the address feild is empty then all addresses | |
2120 | * on the association are effected. Not also that | |
2121 | * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually | |
2122 | * exclusive. Enabling both will have undetermined | |
2123 | * results. | |
2124 | * | |
2125 | * SPP_SACKDELAY_ENABLE - Setting this flag turns | |
2126 | * on delayed sack. The time specified in spp_sackdelay | |
2127 | * is used to specify the sack delay for this address. Note | |
2128 | * that if spp_address is empty then all addresses will | |
2129 | * enable delayed sack and take on the sack delay | |
2130 | * value specified in spp_sackdelay. | |
2131 | * SPP_SACKDELAY_DISABLE - Setting this flag turns | |
2132 | * off delayed sack. If the spp_address field is blank then | |
2133 | * delayed sack is disabled for the entire association. Note | |
2134 | * also that this field is mutually exclusive to | |
2135 | * SPP_SACKDELAY_ENABLE, setting both will have undefined | |
2136 | * results. | |
1da177e4 | 2137 | */ |
16164366 AB |
2138 | static int sctp_apply_peer_addr_params(struct sctp_paddrparams *params, |
2139 | struct sctp_transport *trans, | |
2140 | struct sctp_association *asoc, | |
2141 | struct sctp_sock *sp, | |
2142 | int hb_change, | |
2143 | int pmtud_change, | |
2144 | int sackdelay_change) | |
52ccb8e9 FF |
2145 | { |
2146 | int error; | |
2147 | ||
2148 | if (params->spp_flags & SPP_HB_DEMAND && trans) { | |
2149 | error = sctp_primitive_REQUESTHEARTBEAT (trans->asoc, trans); | |
2150 | if (error) | |
2151 | return error; | |
2152 | } | |
2153 | ||
bdf3092a VY |
2154 | /* Note that unless the spp_flag is set to SPP_HB_ENABLE the value of |
2155 | * this field is ignored. Note also that a value of zero indicates | |
2156 | * the current setting should be left unchanged. | |
2157 | */ | |
2158 | if (params->spp_flags & SPP_HB_ENABLE) { | |
2159 | ||
2160 | /* Re-zero the interval if the SPP_HB_TIME_IS_ZERO is | |
2161 | * set. This lets us use 0 value when this flag | |
2162 | * is set. | |
2163 | */ | |
2164 | if (params->spp_flags & SPP_HB_TIME_IS_ZERO) | |
2165 | params->spp_hbinterval = 0; | |
2166 | ||
2167 | if (params->spp_hbinterval || | |
2168 | (params->spp_flags & SPP_HB_TIME_IS_ZERO)) { | |
2169 | if (trans) { | |
2170 | trans->hbinterval = | |
2171 | msecs_to_jiffies(params->spp_hbinterval); | |
2172 | } else if (asoc) { | |
2173 | asoc->hbinterval = | |
2174 | msecs_to_jiffies(params->spp_hbinterval); | |
2175 | } else { | |
2176 | sp->hbinterval = params->spp_hbinterval; | |
2177 | } | |
52ccb8e9 FF |
2178 | } |
2179 | } | |
2180 | ||
2181 | if (hb_change) { | |
2182 | if (trans) { | |
2183 | trans->param_flags = | |
2184 | (trans->param_flags & ~SPP_HB) | hb_change; | |
2185 | } else if (asoc) { | |
2186 | asoc->param_flags = | |
2187 | (asoc->param_flags & ~SPP_HB) | hb_change; | |
2188 | } else { | |
2189 | sp->param_flags = | |
2190 | (sp->param_flags & ~SPP_HB) | hb_change; | |
2191 | } | |
2192 | } | |
2193 | ||
bdf3092a VY |
2194 | /* When Path MTU discovery is disabled the value specified here will |
2195 | * be the "fixed" path mtu (i.e. the value of the spp_flags field must | |
2196 | * include the flag SPP_PMTUD_DISABLE for this field to have any | |
2197 | * effect). | |
2198 | */ | |
2199 | if ((params->spp_flags & SPP_PMTUD_DISABLE) && params->spp_pathmtu) { | |
52ccb8e9 FF |
2200 | if (trans) { |
2201 | trans->pathmtu = params->spp_pathmtu; | |
2202 | sctp_assoc_sync_pmtu(asoc); | |
2203 | } else if (asoc) { | |
2204 | asoc->pathmtu = params->spp_pathmtu; | |
2205 | sctp_frag_point(sp, params->spp_pathmtu); | |
2206 | } else { | |
2207 | sp->pathmtu = params->spp_pathmtu; | |
2208 | } | |
2209 | } | |
2210 | ||
2211 | if (pmtud_change) { | |
2212 | if (trans) { | |
2213 | int update = (trans->param_flags & SPP_PMTUD_DISABLE) && | |
2214 | (params->spp_flags & SPP_PMTUD_ENABLE); | |
2215 | trans->param_flags = | |
2216 | (trans->param_flags & ~SPP_PMTUD) | pmtud_change; | |
2217 | if (update) { | |
2218 | sctp_transport_pmtu(trans); | |
2219 | sctp_assoc_sync_pmtu(asoc); | |
2220 | } | |
2221 | } else if (asoc) { | |
2222 | asoc->param_flags = | |
2223 | (asoc->param_flags & ~SPP_PMTUD) | pmtud_change; | |
2224 | } else { | |
2225 | sp->param_flags = | |
2226 | (sp->param_flags & ~SPP_PMTUD) | pmtud_change; | |
2227 | } | |
2228 | } | |
2229 | ||
bdf3092a VY |
2230 | /* Note that unless the spp_flag is set to SPP_SACKDELAY_ENABLE the |
2231 | * value of this field is ignored. Note also that a value of zero | |
2232 | * indicates the current setting should be left unchanged. | |
2233 | */ | |
2234 | if ((params->spp_flags & SPP_SACKDELAY_ENABLE) && params->spp_sackdelay) { | |
52ccb8e9 FF |
2235 | if (trans) { |
2236 | trans->sackdelay = | |
2237 | msecs_to_jiffies(params->spp_sackdelay); | |
2238 | } else if (asoc) { | |
2239 | asoc->sackdelay = | |
2240 | msecs_to_jiffies(params->spp_sackdelay); | |
2241 | } else { | |
2242 | sp->sackdelay = params->spp_sackdelay; | |
2243 | } | |
2244 | } | |
2245 | ||
2246 | if (sackdelay_change) { | |
2247 | if (trans) { | |
2248 | trans->param_flags = | |
2249 | (trans->param_flags & ~SPP_SACKDELAY) | | |
2250 | sackdelay_change; | |
2251 | } else if (asoc) { | |
2252 | asoc->param_flags = | |
2253 | (asoc->param_flags & ~SPP_SACKDELAY) | | |
2254 | sackdelay_change; | |
2255 | } else { | |
2256 | sp->param_flags = | |
2257 | (sp->param_flags & ~SPP_SACKDELAY) | | |
2258 | sackdelay_change; | |
2259 | } | |
2260 | } | |
2261 | ||
bdf3092a VY |
2262 | /* Note that unless the spp_flag is set to SPP_PMTUD_ENABLE the value |
2263 | * of this field is ignored. Note also that a value of zero | |
2264 | * indicates the current setting should be left unchanged. | |
2265 | */ | |
2266 | if ((params->spp_flags & SPP_PMTUD_ENABLE) && params->spp_pathmaxrxt) { | |
52ccb8e9 FF |
2267 | if (trans) { |
2268 | trans->pathmaxrxt = params->spp_pathmaxrxt; | |
2269 | } else if (asoc) { | |
2270 | asoc->pathmaxrxt = params->spp_pathmaxrxt; | |
2271 | } else { | |
2272 | sp->pathmaxrxt = params->spp_pathmaxrxt; | |
2273 | } | |
2274 | } | |
2275 | ||
2276 | return 0; | |
2277 | } | |
2278 | ||
1da177e4 LT |
2279 | static int sctp_setsockopt_peer_addr_params(struct sock *sk, |
2280 | char __user *optval, int optlen) | |
2281 | { | |
52ccb8e9 FF |
2282 | struct sctp_paddrparams params; |
2283 | struct sctp_transport *trans = NULL; | |
2284 | struct sctp_association *asoc = NULL; | |
2285 | struct sctp_sock *sp = sctp_sk(sk); | |
1da177e4 | 2286 | int error; |
52ccb8e9 | 2287 | int hb_change, pmtud_change, sackdelay_change; |
1da177e4 LT |
2288 | |
2289 | if (optlen != sizeof(struct sctp_paddrparams)) | |
52ccb8e9 FF |
2290 | return - EINVAL; |
2291 | ||
1da177e4 LT |
2292 | if (copy_from_user(¶ms, optval, optlen)) |
2293 | return -EFAULT; | |
2294 | ||
52ccb8e9 FF |
2295 | /* Validate flags and value parameters. */ |
2296 | hb_change = params.spp_flags & SPP_HB; | |
2297 | pmtud_change = params.spp_flags & SPP_PMTUD; | |
2298 | sackdelay_change = params.spp_flags & SPP_SACKDELAY; | |
2299 | ||
2300 | if (hb_change == SPP_HB || | |
2301 | pmtud_change == SPP_PMTUD || | |
2302 | sackdelay_change == SPP_SACKDELAY || | |
2303 | params.spp_sackdelay > 500 || | |
2304 | (params.spp_pathmtu | |
2305 | && params.spp_pathmtu < SCTP_DEFAULT_MINSEGMENT)) | |
2306 | return -EINVAL; | |
1da177e4 | 2307 | |
52ccb8e9 FF |
2308 | /* If an address other than INADDR_ANY is specified, and |
2309 | * no transport is found, then the request is invalid. | |
2310 | */ | |
2311 | if (!sctp_is_any(( union sctp_addr *)¶ms.spp_address)) { | |
2312 | trans = sctp_addr_id2transport(sk, ¶ms.spp_address, | |
2313 | params.spp_assoc_id); | |
2314 | if (!trans) | |
1da177e4 | 2315 | return -EINVAL; |
1da177e4 LT |
2316 | } |
2317 | ||
52ccb8e9 FF |
2318 | /* Get association, if assoc_id != 0 and the socket is a one |
2319 | * to many style socket, and an association was not found, then | |
2320 | * the id was invalid. | |
2321 | */ | |
2322 | asoc = sctp_id2assoc(sk, params.spp_assoc_id); | |
2323 | if (!asoc && params.spp_assoc_id && sctp_style(sk, UDP)) | |
1da177e4 LT |
2324 | return -EINVAL; |
2325 | ||
52ccb8e9 FF |
2326 | /* Heartbeat demand can only be sent on a transport or |
2327 | * association, but not a socket. | |
1da177e4 | 2328 | */ |
52ccb8e9 FF |
2329 | if (params.spp_flags & SPP_HB_DEMAND && !trans && !asoc) |
2330 | return -EINVAL; | |
2331 | ||
2332 | /* Process parameters. */ | |
2333 | error = sctp_apply_peer_addr_params(¶ms, trans, asoc, sp, | |
2334 | hb_change, pmtud_change, | |
2335 | sackdelay_change); | |
1da177e4 | 2336 | |
52ccb8e9 FF |
2337 | if (error) |
2338 | return error; | |
2339 | ||
2340 | /* If changes are for association, also apply parameters to each | |
2341 | * transport. | |
1da177e4 | 2342 | */ |
52ccb8e9 | 2343 | if (!trans && asoc) { |
9dbc15f0 RD |
2344 | list_for_each_entry(trans, &asoc->peer.transport_addr_list, |
2345 | transports) { | |
52ccb8e9 FF |
2346 | sctp_apply_peer_addr_params(¶ms, trans, asoc, sp, |
2347 | hb_change, pmtud_change, | |
2348 | sackdelay_change); | |
2349 | } | |
2350 | } | |
1da177e4 LT |
2351 | |
2352 | return 0; | |
2353 | } | |
2354 | ||
d364d927 WY |
2355 | /* |
2356 | * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK) | |
2357 | * | |
2358 | * This option will effect the way delayed acks are performed. This | |
2359 | * option allows you to get or set the delayed ack time, in | |
2360 | * milliseconds. It also allows changing the delayed ack frequency. | |
2361 | * Changing the frequency to 1 disables the delayed sack algorithm. If | |
2362 | * the assoc_id is 0, then this sets or gets the endpoints default | |
2363 | * values. If the assoc_id field is non-zero, then the set or get | |
2364 | * effects the specified association for the one to many model (the | |
2365 | * assoc_id field is ignored by the one to one model). Note that if | |
2366 | * sack_delay or sack_freq are 0 when setting this option, then the | |
2367 | * current values will remain unchanged. | |
2368 | * | |
2369 | * struct sctp_sack_info { | |
2370 | * sctp_assoc_t sack_assoc_id; | |
2371 | * uint32_t sack_delay; | |
2372 | * uint32_t sack_freq; | |
2373 | * }; | |
2374 | * | |
2375 | * sack_assoc_id - This parameter, indicates which association the user | |
2376 | * is performing an action upon. Note that if this field's value is | |
2377 | * zero then the endpoints default value is changed (effecting future | |
2378 | * associations only). | |
2379 | * | |
2380 | * sack_delay - This parameter contains the number of milliseconds that | |
2381 | * the user is requesting the delayed ACK timer be set to. Note that | |
2382 | * this value is defined in the standard to be between 200 and 500 | |
2383 | * milliseconds. | |
2384 | * | |
2385 | * sack_freq - This parameter contains the number of packets that must | |
2386 | * be received before a sack is sent without waiting for the delay | |
2387 | * timer to expire. The default value for this is 2, setting this | |
2388 | * value to 1 will disable the delayed sack algorithm. | |
7708610b FF |
2389 | */ |
2390 | ||
d364d927 | 2391 | static int sctp_setsockopt_delayed_ack(struct sock *sk, |
7708610b FF |
2392 | char __user *optval, int optlen) |
2393 | { | |
d364d927 | 2394 | struct sctp_sack_info params; |
7708610b FF |
2395 | struct sctp_transport *trans = NULL; |
2396 | struct sctp_association *asoc = NULL; | |
2397 | struct sctp_sock *sp = sctp_sk(sk); | |
2398 | ||
d364d927 WY |
2399 | if (optlen == sizeof(struct sctp_sack_info)) { |
2400 | if (copy_from_user(¶ms, optval, optlen)) | |
2401 | return -EFAULT; | |
7708610b | 2402 | |
d364d927 WY |
2403 | if (params.sack_delay == 0 && params.sack_freq == 0) |
2404 | return 0; | |
2405 | } else if (optlen == sizeof(struct sctp_assoc_value)) { | |
2406 | printk(KERN_WARNING "SCTP: Use of struct sctp_sack_info " | |
2407 | "in delayed_ack socket option deprecated\n"); | |
2408 | printk(KERN_WARNING "SCTP: struct sctp_sack_info instead\n"); | |
2409 | if (copy_from_user(¶ms, optval, optlen)) | |
2410 | return -EFAULT; | |
2411 | ||
2412 | if (params.sack_delay == 0) | |
2413 | params.sack_freq = 1; | |
2414 | else | |
2415 | params.sack_freq = 0; | |
2416 | } else | |
2417 | return - EINVAL; | |
7708610b FF |
2418 | |
2419 | /* Validate value parameter. */ | |
d364d927 | 2420 | if (params.sack_delay > 500) |
7708610b FF |
2421 | return -EINVAL; |
2422 | ||
d364d927 | 2423 | /* Get association, if sack_assoc_id != 0 and the socket is a one |
7708610b FF |
2424 | * to many style socket, and an association was not found, then |
2425 | * the id was invalid. | |
d808ad9a | 2426 | */ |
d364d927 WY |
2427 | asoc = sctp_id2assoc(sk, params.sack_assoc_id); |
2428 | if (!asoc && params.sack_assoc_id && sctp_style(sk, UDP)) | |
7708610b FF |
2429 | return -EINVAL; |
2430 | ||
d364d927 | 2431 | if (params.sack_delay) { |
7708610b FF |
2432 | if (asoc) { |
2433 | asoc->sackdelay = | |
d364d927 | 2434 | msecs_to_jiffies(params.sack_delay); |
d808ad9a | 2435 | asoc->param_flags = |
7708610b FF |
2436 | (asoc->param_flags & ~SPP_SACKDELAY) | |
2437 | SPP_SACKDELAY_ENABLE; | |
2438 | } else { | |
d364d927 | 2439 | sp->sackdelay = params.sack_delay; |
d808ad9a | 2440 | sp->param_flags = |
7708610b FF |
2441 | (sp->param_flags & ~SPP_SACKDELAY) | |
2442 | SPP_SACKDELAY_ENABLE; | |
2443 | } | |
d364d927 WY |
2444 | } |
2445 | ||
2446 | if (params.sack_freq == 1) { | |
7708610b | 2447 | if (asoc) { |
d808ad9a | 2448 | asoc->param_flags = |
7708610b FF |
2449 | (asoc->param_flags & ~SPP_SACKDELAY) | |
2450 | SPP_SACKDELAY_DISABLE; | |
2451 | } else { | |
d808ad9a | 2452 | sp->param_flags = |
7708610b FF |
2453 | (sp->param_flags & ~SPP_SACKDELAY) | |
2454 | SPP_SACKDELAY_DISABLE; | |
2455 | } | |
d364d927 WY |
2456 | } else if (params.sack_freq > 1) { |
2457 | if (asoc) { | |
2458 | asoc->sackfreq = params.sack_freq; | |
2459 | asoc->param_flags = | |
2460 | (asoc->param_flags & ~SPP_SACKDELAY) | | |
2461 | SPP_SACKDELAY_ENABLE; | |
2462 | } else { | |
2463 | sp->sackfreq = params.sack_freq; | |
2464 | sp->param_flags = | |
2465 | (sp->param_flags & ~SPP_SACKDELAY) | | |
2466 | SPP_SACKDELAY_ENABLE; | |
2467 | } | |
7708610b FF |
2468 | } |
2469 | ||
2470 | /* If change is for association, also apply to each transport. */ | |
2471 | if (asoc) { | |
9dbc15f0 RD |
2472 | list_for_each_entry(trans, &asoc->peer.transport_addr_list, |
2473 | transports) { | |
d364d927 | 2474 | if (params.sack_delay) { |
7708610b | 2475 | trans->sackdelay = |
d364d927 | 2476 | msecs_to_jiffies(params.sack_delay); |
d808ad9a | 2477 | trans->param_flags = |
7708610b FF |
2478 | (trans->param_flags & ~SPP_SACKDELAY) | |
2479 | SPP_SACKDELAY_ENABLE; | |
d364d927 | 2480 | } |
7bfe8bdb | 2481 | if (params.sack_freq == 1) { |
d808ad9a | 2482 | trans->param_flags = |
7708610b FF |
2483 | (trans->param_flags & ~SPP_SACKDELAY) | |
2484 | SPP_SACKDELAY_DISABLE; | |
d364d927 WY |
2485 | } else if (params.sack_freq > 1) { |
2486 | trans->sackfreq = params.sack_freq; | |
2487 | trans->param_flags = | |
2488 | (trans->param_flags & ~SPP_SACKDELAY) | | |
2489 | SPP_SACKDELAY_ENABLE; | |
7708610b FF |
2490 | } |
2491 | } | |
2492 | } | |
d808ad9a | 2493 | |
7708610b FF |
2494 | return 0; |
2495 | } | |
2496 | ||
1da177e4 LT |
2497 | /* 7.1.3 Initialization Parameters (SCTP_INITMSG) |
2498 | * | |
2499 | * Applications can specify protocol parameters for the default association | |
2500 | * initialization. The option name argument to setsockopt() and getsockopt() | |
2501 | * is SCTP_INITMSG. | |
2502 | * | |
2503 | * Setting initialization parameters is effective only on an unconnected | |
2504 | * socket (for UDP-style sockets only future associations are effected | |
2505 | * by the change). With TCP-style sockets, this option is inherited by | |
2506 | * sockets derived from a listener socket. | |
2507 | */ | |
2508 | static int sctp_setsockopt_initmsg(struct sock *sk, char __user *optval, int optlen) | |
2509 | { | |
2510 | struct sctp_initmsg sinit; | |
2511 | struct sctp_sock *sp = sctp_sk(sk); | |
2512 | ||
2513 | if (optlen != sizeof(struct sctp_initmsg)) | |
2514 | return -EINVAL; | |
2515 | if (copy_from_user(&sinit, optval, optlen)) | |
2516 | return -EFAULT; | |
2517 | ||
2518 | if (sinit.sinit_num_ostreams) | |
d808ad9a | 2519 | sp->initmsg.sinit_num_ostreams = sinit.sinit_num_ostreams; |
1da177e4 | 2520 | if (sinit.sinit_max_instreams) |
d808ad9a | 2521 | sp->initmsg.sinit_max_instreams = sinit.sinit_max_instreams; |
1da177e4 | 2522 | if (sinit.sinit_max_attempts) |
d808ad9a | 2523 | sp->initmsg.sinit_max_attempts = sinit.sinit_max_attempts; |
1da177e4 | 2524 | if (sinit.sinit_max_init_timeo) |
d808ad9a | 2525 | sp->initmsg.sinit_max_init_timeo = sinit.sinit_max_init_timeo; |
1da177e4 LT |
2526 | |
2527 | return 0; | |
2528 | } | |
2529 | ||
2530 | /* | |
2531 | * 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM) | |
2532 | * | |
2533 | * Applications that wish to use the sendto() system call may wish to | |
2534 | * specify a default set of parameters that would normally be supplied | |
2535 | * through the inclusion of ancillary data. This socket option allows | |
2536 | * such an application to set the default sctp_sndrcvinfo structure. | |
2537 | * The application that wishes to use this socket option simply passes | |
2538 | * in to this call the sctp_sndrcvinfo structure defined in Section | |
2539 | * 5.2.2) The input parameters accepted by this call include | |
2540 | * sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context, | |
2541 | * sinfo_timetolive. The user must provide the sinfo_assoc_id field in | |
2542 | * to this call if the caller is using the UDP model. | |
2543 | */ | |
2544 | static int sctp_setsockopt_default_send_param(struct sock *sk, | |
2545 | char __user *optval, int optlen) | |
2546 | { | |
2547 | struct sctp_sndrcvinfo info; | |
2548 | struct sctp_association *asoc; | |
2549 | struct sctp_sock *sp = sctp_sk(sk); | |
2550 | ||
2551 | if (optlen != sizeof(struct sctp_sndrcvinfo)) | |
2552 | return -EINVAL; | |
2553 | if (copy_from_user(&info, optval, optlen)) | |
2554 | return -EFAULT; | |
2555 | ||
2556 | asoc = sctp_id2assoc(sk, info.sinfo_assoc_id); | |
2557 | if (!asoc && info.sinfo_assoc_id && sctp_style(sk, UDP)) | |
2558 | return -EINVAL; | |
2559 | ||
2560 | if (asoc) { | |
2561 | asoc->default_stream = info.sinfo_stream; | |
2562 | asoc->default_flags = info.sinfo_flags; | |
2563 | asoc->default_ppid = info.sinfo_ppid; | |
2564 | asoc->default_context = info.sinfo_context; | |
2565 | asoc->default_timetolive = info.sinfo_timetolive; | |
2566 | } else { | |
2567 | sp->default_stream = info.sinfo_stream; | |
2568 | sp->default_flags = info.sinfo_flags; | |
2569 | sp->default_ppid = info.sinfo_ppid; | |
2570 | sp->default_context = info.sinfo_context; | |
2571 | sp->default_timetolive = info.sinfo_timetolive; | |
2572 | } | |
2573 | ||
2574 | return 0; | |
2575 | } | |
2576 | ||
2577 | /* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR) | |
2578 | * | |
2579 | * Requests that the local SCTP stack use the enclosed peer address as | |
2580 | * the association primary. The enclosed address must be one of the | |
2581 | * association peer's addresses. | |
2582 | */ | |
2583 | static int sctp_setsockopt_primary_addr(struct sock *sk, char __user *optval, | |
2584 | int optlen) | |
2585 | { | |
2586 | struct sctp_prim prim; | |
2587 | struct sctp_transport *trans; | |
2588 | ||
2589 | if (optlen != sizeof(struct sctp_prim)) | |
2590 | return -EINVAL; | |
2591 | ||
2592 | if (copy_from_user(&prim, optval, sizeof(struct sctp_prim))) | |
2593 | return -EFAULT; | |
2594 | ||
2595 | trans = sctp_addr_id2transport(sk, &prim.ssp_addr, prim.ssp_assoc_id); | |
2596 | if (!trans) | |
2597 | return -EINVAL; | |
2598 | ||
2599 | sctp_assoc_set_primary(trans->asoc, trans); | |
2600 | ||
2601 | return 0; | |
2602 | } | |
2603 | ||
2604 | /* | |
2605 | * 7.1.5 SCTP_NODELAY | |
2606 | * | |
2607 | * Turn on/off any Nagle-like algorithm. This means that packets are | |
2608 | * generally sent as soon as possible and no unnecessary delays are | |
2609 | * introduced, at the cost of more packets in the network. Expects an | |
2610 | * integer boolean flag. | |
2611 | */ | |
2612 | static int sctp_setsockopt_nodelay(struct sock *sk, char __user *optval, | |
2613 | int optlen) | |
2614 | { | |
2615 | int val; | |
2616 | ||
2617 | if (optlen < sizeof(int)) | |
2618 | return -EINVAL; | |
2619 | if (get_user(val, (int __user *)optval)) | |
2620 | return -EFAULT; | |
2621 | ||
2622 | sctp_sk(sk)->nodelay = (val == 0) ? 0 : 1; | |
2623 | return 0; | |
2624 | } | |
2625 | ||
2626 | /* | |
2627 | * | |
2628 | * 7.1.1 SCTP_RTOINFO | |
2629 | * | |
2630 | * The protocol parameters used to initialize and bound retransmission | |
2631 | * timeout (RTO) are tunable. sctp_rtoinfo structure is used to access | |
2632 | * and modify these parameters. | |
2633 | * All parameters are time values, in milliseconds. A value of 0, when | |
2634 | * modifying the parameters, indicates that the current value should not | |
2635 | * be changed. | |
2636 | * | |
2637 | */ | |
2638 | static int sctp_setsockopt_rtoinfo(struct sock *sk, char __user *optval, int optlen) { | |
2639 | struct sctp_rtoinfo rtoinfo; | |
2640 | struct sctp_association *asoc; | |
2641 | ||
2642 | if (optlen != sizeof (struct sctp_rtoinfo)) | |
2643 | return -EINVAL; | |
2644 | ||
2645 | if (copy_from_user(&rtoinfo, optval, optlen)) | |
2646 | return -EFAULT; | |
2647 | ||
2648 | asoc = sctp_id2assoc(sk, rtoinfo.srto_assoc_id); | |
2649 | ||
2650 | /* Set the values to the specific association */ | |
2651 | if (!asoc && rtoinfo.srto_assoc_id && sctp_style(sk, UDP)) | |
2652 | return -EINVAL; | |
2653 | ||
2654 | if (asoc) { | |
2655 | if (rtoinfo.srto_initial != 0) | |
d808ad9a | 2656 | asoc->rto_initial = |
1da177e4 LT |
2657 | msecs_to_jiffies(rtoinfo.srto_initial); |
2658 | if (rtoinfo.srto_max != 0) | |
2659 | asoc->rto_max = msecs_to_jiffies(rtoinfo.srto_max); | |
2660 | if (rtoinfo.srto_min != 0) | |
2661 | asoc->rto_min = msecs_to_jiffies(rtoinfo.srto_min); | |
2662 | } else { | |
2663 | /* If there is no association or the association-id = 0 | |
2664 | * set the values to the endpoint. | |
2665 | */ | |
2666 | struct sctp_sock *sp = sctp_sk(sk); | |
2667 | ||
2668 | if (rtoinfo.srto_initial != 0) | |
2669 | sp->rtoinfo.srto_initial = rtoinfo.srto_initial; | |
2670 | if (rtoinfo.srto_max != 0) | |
2671 | sp->rtoinfo.srto_max = rtoinfo.srto_max; | |
2672 | if (rtoinfo.srto_min != 0) | |
2673 | sp->rtoinfo.srto_min = rtoinfo.srto_min; | |
2674 | } | |
2675 | ||
2676 | return 0; | |
2677 | } | |
2678 | ||
2679 | /* | |
2680 | * | |
2681 | * 7.1.2 SCTP_ASSOCINFO | |
2682 | * | |
59c51591 | 2683 | * This option is used to tune the maximum retransmission attempts |
1da177e4 LT |
2684 | * of the association. |
2685 | * Returns an error if the new association retransmission value is | |
2686 | * greater than the sum of the retransmission value of the peer. | |
2687 | * See [SCTP] for more information. | |
2688 | * | |
2689 | */ | |
2690 | static int sctp_setsockopt_associnfo(struct sock *sk, char __user *optval, int optlen) | |
2691 | { | |
2692 | ||
2693 | struct sctp_assocparams assocparams; | |
2694 | struct sctp_association *asoc; | |
2695 | ||
2696 | if (optlen != sizeof(struct sctp_assocparams)) | |
2697 | return -EINVAL; | |
2698 | if (copy_from_user(&assocparams, optval, optlen)) | |
2699 | return -EFAULT; | |
2700 | ||
2701 | asoc = sctp_id2assoc(sk, assocparams.sasoc_assoc_id); | |
2702 | ||
2703 | if (!asoc && assocparams.sasoc_assoc_id && sctp_style(sk, UDP)) | |
2704 | return -EINVAL; | |
2705 | ||
2706 | /* Set the values to the specific association */ | |
2707 | if (asoc) { | |
402d68c4 VY |
2708 | if (assocparams.sasoc_asocmaxrxt != 0) { |
2709 | __u32 path_sum = 0; | |
2710 | int paths = 0; | |
402d68c4 VY |
2711 | struct sctp_transport *peer_addr; |
2712 | ||
9dbc15f0 RD |
2713 | list_for_each_entry(peer_addr, &asoc->peer.transport_addr_list, |
2714 | transports) { | |
402d68c4 VY |
2715 | path_sum += peer_addr->pathmaxrxt; |
2716 | paths++; | |
2717 | } | |
2718 | ||
2719 | /* Only validate asocmaxrxt if we have more then | |
2720 | * one path/transport. We do this because path | |
2721 | * retransmissions are only counted when we have more | |
2722 | * then one path. | |
2723 | */ | |
2724 | if (paths > 1 && | |
2725 | assocparams.sasoc_asocmaxrxt > path_sum) | |
2726 | return -EINVAL; | |
2727 | ||
1da177e4 | 2728 | asoc->max_retrans = assocparams.sasoc_asocmaxrxt; |
402d68c4 VY |
2729 | } |
2730 | ||
1da177e4 LT |
2731 | if (assocparams.sasoc_cookie_life != 0) { |
2732 | asoc->cookie_life.tv_sec = | |
2733 | assocparams.sasoc_cookie_life / 1000; | |
2734 | asoc->cookie_life.tv_usec = | |
2735 | (assocparams.sasoc_cookie_life % 1000) | |
2736 | * 1000; | |
2737 | } | |
2738 | } else { | |
2739 | /* Set the values to the endpoint */ | |
2740 | struct sctp_sock *sp = sctp_sk(sk); | |
2741 | ||
2742 | if (assocparams.sasoc_asocmaxrxt != 0) | |
2743 | sp->assocparams.sasoc_asocmaxrxt = | |
2744 | assocparams.sasoc_asocmaxrxt; | |
2745 | if (assocparams.sasoc_cookie_life != 0) | |
2746 | sp->assocparams.sasoc_cookie_life = | |
2747 | assocparams.sasoc_cookie_life; | |
2748 | } | |
2749 | return 0; | |
2750 | } | |
2751 | ||
2752 | /* | |
2753 | * 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR) | |
2754 | * | |
2755 | * This socket option is a boolean flag which turns on or off mapped V4 | |
2756 | * addresses. If this option is turned on and the socket is type | |
2757 | * PF_INET6, then IPv4 addresses will be mapped to V6 representation. | |
2758 | * If this option is turned off, then no mapping will be done of V4 | |
2759 | * addresses and a user will receive both PF_INET6 and PF_INET type | |
2760 | * addresses on the socket. | |
2761 | */ | |
2762 | static int sctp_setsockopt_mappedv4(struct sock *sk, char __user *optval, int optlen) | |
2763 | { | |
2764 | int val; | |
2765 | struct sctp_sock *sp = sctp_sk(sk); | |
2766 | ||
2767 | if (optlen < sizeof(int)) | |
2768 | return -EINVAL; | |
2769 | if (get_user(val, (int __user *)optval)) | |
2770 | return -EFAULT; | |
2771 | if (val) | |
2772 | sp->v4mapped = 1; | |
2773 | else | |
2774 | sp->v4mapped = 0; | |
2775 | ||
2776 | return 0; | |
2777 | } | |
2778 | ||
2779 | /* | |
2780 | * 7.1.17 Set the maximum fragrmentation size (SCTP_MAXSEG) | |
2781 | * | |
2782 | * This socket option specifies the maximum size to put in any outgoing | |
2783 | * SCTP chunk. If a message is larger than this size it will be | |
2784 | * fragmented by SCTP into the specified size. Note that the underlying | |
2785 | * SCTP implementation may fragment into smaller sized chunks when the | |
2786 | * PMTU of the underlying association is smaller than the value set by | |
2787 | * the user. | |
2788 | */ | |
2789 | static int sctp_setsockopt_maxseg(struct sock *sk, char __user *optval, int optlen) | |
2790 | { | |
2791 | struct sctp_association *asoc; | |
1da177e4 LT |
2792 | struct sctp_sock *sp = sctp_sk(sk); |
2793 | int val; | |
2794 | ||
2795 | if (optlen < sizeof(int)) | |
2796 | return -EINVAL; | |
2797 | if (get_user(val, (int __user *)optval)) | |
2798 | return -EFAULT; | |
96a33998 | 2799 | if ((val != 0) && ((val < 8) || (val > SCTP_MAX_CHUNK_LEN))) |
1da177e4 LT |
2800 | return -EINVAL; |
2801 | sp->user_frag = val; | |
2802 | ||
96a33998 | 2803 | /* Update the frag_point of the existing associations. */ |
9dbc15f0 | 2804 | list_for_each_entry(asoc, &(sp->ep->asocs), asocs) { |
d808ad9a | 2805 | asoc->frag_point = sctp_frag_point(sp, asoc->pathmtu); |
1da177e4 LT |
2806 | } |
2807 | ||
2808 | return 0; | |
2809 | } | |
2810 | ||
2811 | ||
2812 | /* | |
2813 | * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR) | |
2814 | * | |
2815 | * Requests that the peer mark the enclosed address as the association | |
2816 | * primary. The enclosed address must be one of the association's | |
2817 | * locally bound addresses. The following structure is used to make a | |
2818 | * set primary request: | |
2819 | */ | |
2820 | static int sctp_setsockopt_peer_primary_addr(struct sock *sk, char __user *optval, | |
2821 | int optlen) | |
2822 | { | |
2823 | struct sctp_sock *sp; | |
2824 | struct sctp_endpoint *ep; | |
2825 | struct sctp_association *asoc = NULL; | |
2826 | struct sctp_setpeerprim prim; | |
2827 | struct sctp_chunk *chunk; | |
2828 | int err; | |
2829 | ||
2830 | sp = sctp_sk(sk); | |
2831 | ep = sp->ep; | |
2832 | ||
2833 | if (!sctp_addip_enable) | |
2834 | return -EPERM; | |
2835 | ||
2836 | if (optlen != sizeof(struct sctp_setpeerprim)) | |
2837 | return -EINVAL; | |
2838 | ||
2839 | if (copy_from_user(&prim, optval, optlen)) | |
2840 | return -EFAULT; | |
2841 | ||
2842 | asoc = sctp_id2assoc(sk, prim.sspp_assoc_id); | |
d808ad9a | 2843 | if (!asoc) |
1da177e4 LT |
2844 | return -EINVAL; |
2845 | ||
2846 | if (!asoc->peer.asconf_capable) | |
2847 | return -EPERM; | |
2848 | ||
2849 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_SET_PRIMARY) | |
2850 | return -EPERM; | |
2851 | ||
2852 | if (!sctp_state(asoc, ESTABLISHED)) | |
2853 | return -ENOTCONN; | |
2854 | ||
2855 | if (!sctp_assoc_lookup_laddr(asoc, (union sctp_addr *)&prim.sspp_addr)) | |
2856 | return -EADDRNOTAVAIL; | |
2857 | ||
2858 | /* Create an ASCONF chunk with SET_PRIMARY parameter */ | |
2859 | chunk = sctp_make_asconf_set_prim(asoc, | |
2860 | (union sctp_addr *)&prim.sspp_addr); | |
2861 | if (!chunk) | |
2862 | return -ENOMEM; | |
2863 | ||
2864 | err = sctp_send_asconf(asoc, chunk); | |
2865 | ||
2866 | SCTP_DEBUG_PRINTK("We set peer primary addr primitively.\n"); | |
2867 | ||
2868 | return err; | |
2869 | } | |
2870 | ||
0f3fffd8 | 2871 | static int sctp_setsockopt_adaptation_layer(struct sock *sk, char __user *optval, |
1da177e4 LT |
2872 | int optlen) |
2873 | { | |
0f3fffd8 | 2874 | struct sctp_setadaptation adaptation; |
1da177e4 | 2875 | |
0f3fffd8 | 2876 | if (optlen != sizeof(struct sctp_setadaptation)) |
1da177e4 | 2877 | return -EINVAL; |
0f3fffd8 | 2878 | if (copy_from_user(&adaptation, optval, optlen)) |
1da177e4 LT |
2879 | return -EFAULT; |
2880 | ||
0f3fffd8 | 2881 | sctp_sk(sk)->adaptation_ind = adaptation.ssb_adaptation_ind; |
1da177e4 LT |
2882 | |
2883 | return 0; | |
2884 | } | |
2885 | ||
6ab792f5 ISJ |
2886 | /* |
2887 | * 7.1.29. Set or Get the default context (SCTP_CONTEXT) | |
2888 | * | |
2889 | * The context field in the sctp_sndrcvinfo structure is normally only | |
2890 | * used when a failed message is retrieved holding the value that was | |
2891 | * sent down on the actual send call. This option allows the setting of | |
2892 | * a default context on an association basis that will be received on | |
2893 | * reading messages from the peer. This is especially helpful in the | |
2894 | * one-2-many model for an application to keep some reference to an | |
2895 | * internal state machine that is processing messages on the | |
2896 | * association. Note that the setting of this value only effects | |
2897 | * received messages from the peer and does not effect the value that is | |
2898 | * saved with outbound messages. | |
2899 | */ | |
2900 | static int sctp_setsockopt_context(struct sock *sk, char __user *optval, | |
2901 | int optlen) | |
2902 | { | |
2903 | struct sctp_assoc_value params; | |
2904 | struct sctp_sock *sp; | |
2905 | struct sctp_association *asoc; | |
2906 | ||
2907 | if (optlen != sizeof(struct sctp_assoc_value)) | |
2908 | return -EINVAL; | |
2909 | if (copy_from_user(¶ms, optval, optlen)) | |
2910 | return -EFAULT; | |
2911 | ||
2912 | sp = sctp_sk(sk); | |
2913 | ||
2914 | if (params.assoc_id != 0) { | |
2915 | asoc = sctp_id2assoc(sk, params.assoc_id); | |
2916 | if (!asoc) | |
2917 | return -EINVAL; | |
2918 | asoc->default_rcv_context = params.assoc_value; | |
2919 | } else { | |
2920 | sp->default_rcv_context = params.assoc_value; | |
2921 | } | |
2922 | ||
2923 | return 0; | |
2924 | } | |
2925 | ||
b6e1331f VY |
2926 | /* |
2927 | * 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE) | |
2928 | * | |
2929 | * This options will at a minimum specify if the implementation is doing | |
2930 | * fragmented interleave. Fragmented interleave, for a one to many | |
2931 | * socket, is when subsequent calls to receive a message may return | |
2932 | * parts of messages from different associations. Some implementations | |
2933 | * may allow you to turn this value on or off. If so, when turned off, | |
2934 | * no fragment interleave will occur (which will cause a head of line | |
2935 | * blocking amongst multiple associations sharing the same one to many | |
2936 | * socket). When this option is turned on, then each receive call may | |
2937 | * come from a different association (thus the user must receive data | |
2938 | * with the extended calls (e.g. sctp_recvmsg) to keep track of which | |
2939 | * association each receive belongs to. | |
2940 | * | |
2941 | * This option takes a boolean value. A non-zero value indicates that | |
2942 | * fragmented interleave is on. A value of zero indicates that | |
2943 | * fragmented interleave is off. | |
2944 | * | |
2945 | * Note that it is important that an implementation that allows this | |
2946 | * option to be turned on, have it off by default. Otherwise an unaware | |
2947 | * application using the one to many model may become confused and act | |
2948 | * incorrectly. | |
2949 | */ | |
2950 | static int sctp_setsockopt_fragment_interleave(struct sock *sk, | |
2951 | char __user *optval, | |
2952 | int optlen) | |
2953 | { | |
2954 | int val; | |
2955 | ||
2956 | if (optlen != sizeof(int)) | |
2957 | return -EINVAL; | |
2958 | if (get_user(val, (int __user *)optval)) | |
2959 | return -EFAULT; | |
2960 | ||
2961 | sctp_sk(sk)->frag_interleave = (val == 0) ? 0 : 1; | |
2962 | ||
2963 | return 0; | |
2964 | } | |
2965 | ||
d49d91d7 VY |
2966 | /* |
2967 | * 7.1.25. Set or Get the sctp partial delivery point | |
2968 | * (SCTP_PARTIAL_DELIVERY_POINT) | |
2969 | * This option will set or get the SCTP partial delivery point. This | |
2970 | * point is the size of a message where the partial delivery API will be | |
2971 | * invoked to help free up rwnd space for the peer. Setting this to a | |
2972 | * lower value will cause partial delivery's to happen more often. The | |
2973 | * calls argument is an integer that sets or gets the partial delivery | |
2974 | * point. | |
2975 | */ | |
2976 | static int sctp_setsockopt_partial_delivery_point(struct sock *sk, | |
2977 | char __user *optval, | |
2978 | int optlen) | |
2979 | { | |
2980 | u32 val; | |
2981 | ||
2982 | if (optlen != sizeof(u32)) | |
2983 | return -EINVAL; | |
2984 | if (get_user(val, (int __user *)optval)) | |
2985 | return -EFAULT; | |
2986 | ||
2987 | sctp_sk(sk)->pd_point = val; | |
2988 | ||
2989 | return 0; /* is this the right error code? */ | |
2990 | } | |
2991 | ||
70331571 VY |
2992 | /* |
2993 | * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST) | |
2994 | * | |
2995 | * This option will allow a user to change the maximum burst of packets | |
2996 | * that can be emitted by this association. Note that the default value | |
2997 | * is 4, and some implementations may restrict this setting so that it | |
2998 | * can only be lowered. | |
2999 | * | |
3000 | * NOTE: This text doesn't seem right. Do this on a socket basis with | |
3001 | * future associations inheriting the socket value. | |
3002 | */ | |
3003 | static int sctp_setsockopt_maxburst(struct sock *sk, | |
3004 | char __user *optval, | |
3005 | int optlen) | |
3006 | { | |
219b99a9 NH |
3007 | struct sctp_assoc_value params; |
3008 | struct sctp_sock *sp; | |
3009 | struct sctp_association *asoc; | |
70331571 | 3010 | int val; |
219b99a9 | 3011 | int assoc_id = 0; |
70331571 | 3012 | |
219b99a9 | 3013 | if (optlen < sizeof(int)) |
70331571 | 3014 | return -EINVAL; |
70331571 | 3015 | |
219b99a9 NH |
3016 | if (optlen == sizeof(int)) { |
3017 | printk(KERN_WARNING | |
3018 | "SCTP: Use of int in max_burst socket option deprecated\n"); | |
3019 | printk(KERN_WARNING | |
3020 | "SCTP: Use struct sctp_assoc_value instead\n"); | |
3021 | if (copy_from_user(&val, optval, optlen)) | |
3022 | return -EFAULT; | |
3023 | } else if (optlen == sizeof(struct sctp_assoc_value)) { | |
3024 | if (copy_from_user(¶ms, optval, optlen)) | |
3025 | return -EFAULT; | |
3026 | val = params.assoc_value; | |
3027 | assoc_id = params.assoc_id; | |
3028 | } else | |
70331571 VY |
3029 | return -EINVAL; |
3030 | ||
219b99a9 NH |
3031 | sp = sctp_sk(sk); |
3032 | ||
3033 | if (assoc_id != 0) { | |
3034 | asoc = sctp_id2assoc(sk, assoc_id); | |
3035 | if (!asoc) | |
3036 | return -EINVAL; | |
3037 | asoc->max_burst = val; | |
3038 | } else | |
3039 | sp->max_burst = val; | |
70331571 VY |
3040 | |
3041 | return 0; | |
3042 | } | |
3043 | ||
65b07e5d VY |
3044 | /* |
3045 | * 7.1.18. Add a chunk that must be authenticated (SCTP_AUTH_CHUNK) | |
3046 | * | |
3047 | * This set option adds a chunk type that the user is requesting to be | |
3048 | * received only in an authenticated way. Changes to the list of chunks | |
3049 | * will only effect future associations on the socket. | |
3050 | */ | |
3051 | static int sctp_setsockopt_auth_chunk(struct sock *sk, | |
3052 | char __user *optval, | |
3053 | int optlen) | |
3054 | { | |
3055 | struct sctp_authchunk val; | |
3056 | ||
3057 | if (optlen != sizeof(struct sctp_authchunk)) | |
3058 | return -EINVAL; | |
3059 | if (copy_from_user(&val, optval, optlen)) | |
3060 | return -EFAULT; | |
3061 | ||
3062 | switch (val.sauth_chunk) { | |
3063 | case SCTP_CID_INIT: | |
3064 | case SCTP_CID_INIT_ACK: | |
3065 | case SCTP_CID_SHUTDOWN_COMPLETE: | |
3066 | case SCTP_CID_AUTH: | |
3067 | return -EINVAL; | |
3068 | } | |
3069 | ||
3070 | /* add this chunk id to the endpoint */ | |
3071 | return sctp_auth_ep_add_chunkid(sctp_sk(sk)->ep, val.sauth_chunk); | |
3072 | } | |
3073 | ||
3074 | /* | |
3075 | * 7.1.19. Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT) | |
3076 | * | |
3077 | * This option gets or sets the list of HMAC algorithms that the local | |
3078 | * endpoint requires the peer to use. | |
3079 | */ | |
3080 | static int sctp_setsockopt_hmac_ident(struct sock *sk, | |
3081 | char __user *optval, | |
3082 | int optlen) | |
3083 | { | |
3084 | struct sctp_hmacalgo *hmacs; | |
3085 | int err; | |
3086 | ||
3087 | if (optlen < sizeof(struct sctp_hmacalgo)) | |
3088 | return -EINVAL; | |
3089 | ||
3090 | hmacs = kmalloc(optlen, GFP_KERNEL); | |
3091 | if (!hmacs) | |
3092 | return -ENOMEM; | |
3093 | ||
3094 | if (copy_from_user(hmacs, optval, optlen)) { | |
3095 | err = -EFAULT; | |
3096 | goto out; | |
3097 | } | |
3098 | ||
3099 | if (hmacs->shmac_num_idents == 0 || | |
3100 | hmacs->shmac_num_idents > SCTP_AUTH_NUM_HMACS) { | |
3101 | err = -EINVAL; | |
3102 | goto out; | |
3103 | } | |
3104 | ||
3105 | err = sctp_auth_ep_set_hmacs(sctp_sk(sk)->ep, hmacs); | |
3106 | out: | |
3107 | kfree(hmacs); | |
3108 | return err; | |
3109 | } | |
3110 | ||
3111 | /* | |
3112 | * 7.1.20. Set a shared key (SCTP_AUTH_KEY) | |
3113 | * | |
3114 | * This option will set a shared secret key which is used to build an | |
3115 | * association shared key. | |
3116 | */ | |
3117 | static int sctp_setsockopt_auth_key(struct sock *sk, | |
3118 | char __user *optval, | |
3119 | int optlen) | |
3120 | { | |
3121 | struct sctp_authkey *authkey; | |
3122 | struct sctp_association *asoc; | |
3123 | int ret; | |
3124 | ||
3125 | if (optlen <= sizeof(struct sctp_authkey)) | |
3126 | return -EINVAL; | |
3127 | ||
3128 | authkey = kmalloc(optlen, GFP_KERNEL); | |
3129 | if (!authkey) | |
3130 | return -ENOMEM; | |
3131 | ||
3132 | if (copy_from_user(authkey, optval, optlen)) { | |
3133 | ret = -EFAULT; | |
3134 | goto out; | |
3135 | } | |
3136 | ||
3137 | asoc = sctp_id2assoc(sk, authkey->sca_assoc_id); | |
3138 | if (!asoc && authkey->sca_assoc_id && sctp_style(sk, UDP)) { | |
3139 | ret = -EINVAL; | |
3140 | goto out; | |
3141 | } | |
3142 | ||
3143 | ret = sctp_auth_set_key(sctp_sk(sk)->ep, asoc, authkey); | |
3144 | out: | |
3145 | kfree(authkey); | |
3146 | return ret; | |
3147 | } | |
3148 | ||
3149 | /* | |
3150 | * 7.1.21. Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY) | |
3151 | * | |
3152 | * This option will get or set the active shared key to be used to build | |
3153 | * the association shared key. | |
3154 | */ | |
3155 | static int sctp_setsockopt_active_key(struct sock *sk, | |
3156 | char __user *optval, | |
3157 | int optlen) | |
3158 | { | |
3159 | struct sctp_authkeyid val; | |
3160 | struct sctp_association *asoc; | |
3161 | ||
3162 | if (optlen != sizeof(struct sctp_authkeyid)) | |
3163 | return -EINVAL; | |
3164 | if (copy_from_user(&val, optval, optlen)) | |
3165 | return -EFAULT; | |
3166 | ||
3167 | asoc = sctp_id2assoc(sk, val.scact_assoc_id); | |
3168 | if (!asoc && val.scact_assoc_id && sctp_style(sk, UDP)) | |
3169 | return -EINVAL; | |
3170 | ||
3171 | return sctp_auth_set_active_key(sctp_sk(sk)->ep, asoc, | |
3172 | val.scact_keynumber); | |
3173 | } | |
3174 | ||
3175 | /* | |
3176 | * 7.1.22. Delete a shared key (SCTP_AUTH_DELETE_KEY) | |
3177 | * | |
3178 | * This set option will delete a shared secret key from use. | |
3179 | */ | |
3180 | static int sctp_setsockopt_del_key(struct sock *sk, | |
3181 | char __user *optval, | |
3182 | int optlen) | |
3183 | { | |
3184 | struct sctp_authkeyid val; | |
3185 | struct sctp_association *asoc; | |
3186 | ||
3187 | if (optlen != sizeof(struct sctp_authkeyid)) | |
3188 | return -EINVAL; | |
3189 | if (copy_from_user(&val, optval, optlen)) | |
3190 | return -EFAULT; | |
3191 | ||
3192 | asoc = sctp_id2assoc(sk, val.scact_assoc_id); | |
3193 | if (!asoc && val.scact_assoc_id && sctp_style(sk, UDP)) | |
3194 | return -EINVAL; | |
3195 | ||
3196 | return sctp_auth_del_key_id(sctp_sk(sk)->ep, asoc, | |
3197 | val.scact_keynumber); | |
3198 | ||
3199 | } | |
3200 | ||
3201 | ||
1da177e4 LT |
3202 | /* API 6.2 setsockopt(), getsockopt() |
3203 | * | |
3204 | * Applications use setsockopt() and getsockopt() to set or retrieve | |
3205 | * socket options. Socket options are used to change the default | |
3206 | * behavior of sockets calls. They are described in Section 7. | |
3207 | * | |
3208 | * The syntax is: | |
3209 | * | |
3210 | * ret = getsockopt(int sd, int level, int optname, void __user *optval, | |
3211 | * int __user *optlen); | |
3212 | * ret = setsockopt(int sd, int level, int optname, const void __user *optval, | |
3213 | * int optlen); | |
3214 | * | |
3215 | * sd - the socket descript. | |
3216 | * level - set to IPPROTO_SCTP for all SCTP options. | |
3217 | * optname - the option name. | |
3218 | * optval - the buffer to store the value of the option. | |
3219 | * optlen - the size of the buffer. | |
3220 | */ | |
3221 | SCTP_STATIC int sctp_setsockopt(struct sock *sk, int level, int optname, | |
3222 | char __user *optval, int optlen) | |
3223 | { | |
3224 | int retval = 0; | |
3225 | ||
3226 | SCTP_DEBUG_PRINTK("sctp_setsockopt(sk: %p... optname: %d)\n", | |
3227 | sk, optname); | |
3228 | ||
3229 | /* I can hardly begin to describe how wrong this is. This is | |
3230 | * so broken as to be worse than useless. The API draft | |
3231 | * REALLY is NOT helpful here... I am not convinced that the | |
3232 | * semantics of setsockopt() with a level OTHER THAN SOL_SCTP | |
3233 | * are at all well-founded. | |
3234 | */ | |
3235 | if (level != SOL_SCTP) { | |
3236 | struct sctp_af *af = sctp_sk(sk)->pf->af; | |
3237 | retval = af->setsockopt(sk, level, optname, optval, optlen); | |
3238 | goto out_nounlock; | |
3239 | } | |
3240 | ||
3241 | sctp_lock_sock(sk); | |
3242 | ||
3243 | switch (optname) { | |
3244 | case SCTP_SOCKOPT_BINDX_ADD: | |
3245 | /* 'optlen' is the size of the addresses buffer. */ | |
3246 | retval = sctp_setsockopt_bindx(sk, (struct sockaddr __user *)optval, | |
3247 | optlen, SCTP_BINDX_ADD_ADDR); | |
3248 | break; | |
3249 | ||
3250 | case SCTP_SOCKOPT_BINDX_REM: | |
3251 | /* 'optlen' is the size of the addresses buffer. */ | |
3252 | retval = sctp_setsockopt_bindx(sk, (struct sockaddr __user *)optval, | |
3253 | optlen, SCTP_BINDX_REM_ADDR); | |
3254 | break; | |
3255 | ||
88a0a948 VY |
3256 | case SCTP_SOCKOPT_CONNECTX_OLD: |
3257 | /* 'optlen' is the size of the addresses buffer. */ | |
3258 | retval = sctp_setsockopt_connectx_old(sk, | |
3259 | (struct sockaddr __user *)optval, | |
3260 | optlen); | |
3261 | break; | |
3262 | ||
3f7a87d2 FF |
3263 | case SCTP_SOCKOPT_CONNECTX: |
3264 | /* 'optlen' is the size of the addresses buffer. */ | |
88a0a948 VY |
3265 | retval = sctp_setsockopt_connectx(sk, |
3266 | (struct sockaddr __user *)optval, | |
3267 | optlen); | |
3f7a87d2 FF |
3268 | break; |
3269 | ||
1da177e4 LT |
3270 | case SCTP_DISABLE_FRAGMENTS: |
3271 | retval = sctp_setsockopt_disable_fragments(sk, optval, optlen); | |
3272 | break; | |
3273 | ||
3274 | case SCTP_EVENTS: | |
3275 | retval = sctp_setsockopt_events(sk, optval, optlen); | |
3276 | break; | |
3277 | ||
3278 | case SCTP_AUTOCLOSE: | |
3279 | retval = sctp_setsockopt_autoclose(sk, optval, optlen); | |
3280 | break; | |
3281 | ||
3282 | case SCTP_PEER_ADDR_PARAMS: | |
3283 | retval = sctp_setsockopt_peer_addr_params(sk, optval, optlen); | |
3284 | break; | |
3285 | ||
d364d927 WY |
3286 | case SCTP_DELAYED_ACK: |
3287 | retval = sctp_setsockopt_delayed_ack(sk, optval, optlen); | |
7708610b | 3288 | break; |
d49d91d7 VY |
3289 | case SCTP_PARTIAL_DELIVERY_POINT: |
3290 | retval = sctp_setsockopt_partial_delivery_point(sk, optval, optlen); | |
3291 | break; | |
7708610b | 3292 | |
1da177e4 LT |
3293 | case SCTP_INITMSG: |
3294 | retval = sctp_setsockopt_initmsg(sk, optval, optlen); | |
3295 | break; | |
3296 | case SCTP_DEFAULT_SEND_PARAM: | |
3297 | retval = sctp_setsockopt_default_send_param(sk, optval, | |
3298 | optlen); | |
3299 | break; | |
3300 | case SCTP_PRIMARY_ADDR: | |
3301 | retval = sctp_setsockopt_primary_addr(sk, optval, optlen); | |
3302 | break; | |
3303 | case SCTP_SET_PEER_PRIMARY_ADDR: | |
3304 | retval = sctp_setsockopt_peer_primary_addr(sk, optval, optlen); | |
3305 | break; | |
3306 | case SCTP_NODELAY: | |
3307 | retval = sctp_setsockopt_nodelay(sk, optval, optlen); | |
3308 | break; | |
3309 | case SCTP_RTOINFO: | |
3310 | retval = sctp_setsockopt_rtoinfo(sk, optval, optlen); | |
3311 | break; | |
3312 | case SCTP_ASSOCINFO: | |
3313 | retval = sctp_setsockopt_associnfo(sk, optval, optlen); | |
3314 | break; | |
3315 | case SCTP_I_WANT_MAPPED_V4_ADDR: | |
3316 | retval = sctp_setsockopt_mappedv4(sk, optval, optlen); | |
3317 | break; | |
3318 | case SCTP_MAXSEG: | |
3319 | retval = sctp_setsockopt_maxseg(sk, optval, optlen); | |
3320 | break; | |
0f3fffd8 ISJ |
3321 | case SCTP_ADAPTATION_LAYER: |
3322 | retval = sctp_setsockopt_adaptation_layer(sk, optval, optlen); | |
1da177e4 | 3323 | break; |
6ab792f5 ISJ |
3324 | case SCTP_CONTEXT: |
3325 | retval = sctp_setsockopt_context(sk, optval, optlen); | |
3326 | break; | |
b6e1331f VY |
3327 | case SCTP_FRAGMENT_INTERLEAVE: |
3328 | retval = sctp_setsockopt_fragment_interleave(sk, optval, optlen); | |
3329 | break; | |
70331571 VY |
3330 | case SCTP_MAX_BURST: |
3331 | retval = sctp_setsockopt_maxburst(sk, optval, optlen); | |
3332 | break; | |
65b07e5d VY |
3333 | case SCTP_AUTH_CHUNK: |
3334 | retval = sctp_setsockopt_auth_chunk(sk, optval, optlen); | |
3335 | break; | |
3336 | case SCTP_HMAC_IDENT: | |
3337 | retval = sctp_setsockopt_hmac_ident(sk, optval, optlen); | |
3338 | break; | |
3339 | case SCTP_AUTH_KEY: | |
3340 | retval = sctp_setsockopt_auth_key(sk, optval, optlen); | |
3341 | break; | |
3342 | case SCTP_AUTH_ACTIVE_KEY: | |
3343 | retval = sctp_setsockopt_active_key(sk, optval, optlen); | |
3344 | break; | |
3345 | case SCTP_AUTH_DELETE_KEY: | |
3346 | retval = sctp_setsockopt_del_key(sk, optval, optlen); | |
3347 | break; | |
1da177e4 LT |
3348 | default: |
3349 | retval = -ENOPROTOOPT; | |
3350 | break; | |
3ff50b79 | 3351 | } |
1da177e4 LT |
3352 | |
3353 | sctp_release_sock(sk); | |
3354 | ||
3355 | out_nounlock: | |
3356 | return retval; | |
3357 | } | |
3358 | ||
3359 | /* API 3.1.6 connect() - UDP Style Syntax | |
3360 | * | |
3361 | * An application may use the connect() call in the UDP model to initiate an | |
3362 | * association without sending data. | |
3363 | * | |
3364 | * The syntax is: | |
3365 | * | |
3366 | * ret = connect(int sd, const struct sockaddr *nam, socklen_t len); | |
3367 | * | |
3368 | * sd: the socket descriptor to have a new association added to. | |
3369 | * | |
3370 | * nam: the address structure (either struct sockaddr_in or struct | |
3371 | * sockaddr_in6 defined in RFC2553 [7]). | |
3372 | * | |
3373 | * len: the size of the address. | |
3374 | */ | |
3f7a87d2 | 3375 | SCTP_STATIC int sctp_connect(struct sock *sk, struct sockaddr *addr, |
1da177e4 LT |
3376 | int addr_len) |
3377 | { | |
1da177e4 | 3378 | int err = 0; |
3f7a87d2 | 3379 | struct sctp_af *af; |
1da177e4 LT |
3380 | |
3381 | sctp_lock_sock(sk); | |
3382 | ||
3f7a87d2 | 3383 | SCTP_DEBUG_PRINTK("%s - sk: %p, sockaddr: %p, addr_len: %d\n", |
0dc47877 | 3384 | __func__, sk, addr, addr_len); |
1da177e4 | 3385 | |
3f7a87d2 FF |
3386 | /* Validate addr_len before calling common connect/connectx routine. */ |
3387 | af = sctp_get_af_specific(addr->sa_family); | |
3388 | if (!af || addr_len < af->sockaddr_len) { | |
3389 | err = -EINVAL; | |
3390 | } else { | |
3391 | /* Pass correct addr len to common routine (so it knows there | |
3392 | * is only one address being passed. | |
3393 | */ | |
88a0a948 | 3394 | err = __sctp_connect(sk, addr, af->sockaddr_len, NULL); |
1da177e4 LT |
3395 | } |
3396 | ||
1da177e4 | 3397 | sctp_release_sock(sk); |
1da177e4 LT |
3398 | return err; |
3399 | } | |
3400 | ||
3401 | /* FIXME: Write comments. */ | |
3402 | SCTP_STATIC int sctp_disconnect(struct sock *sk, int flags) | |
3403 | { | |
3404 | return -EOPNOTSUPP; /* STUB */ | |
3405 | } | |
3406 | ||
3407 | /* 4.1.4 accept() - TCP Style Syntax | |
3408 | * | |
3409 | * Applications use accept() call to remove an established SCTP | |
3410 | * association from the accept queue of the endpoint. A new socket | |
3411 | * descriptor will be returned from accept() to represent the newly | |
3412 | * formed association. | |
3413 | */ | |
3414 | SCTP_STATIC struct sock *sctp_accept(struct sock *sk, int flags, int *err) | |
3415 | { | |
3416 | struct sctp_sock *sp; | |
3417 | struct sctp_endpoint *ep; | |
3418 | struct sock *newsk = NULL; | |
3419 | struct sctp_association *asoc; | |
3420 | long timeo; | |
3421 | int error = 0; | |
3422 | ||
3423 | sctp_lock_sock(sk); | |
3424 | ||
3425 | sp = sctp_sk(sk); | |
3426 | ep = sp->ep; | |
3427 | ||
3428 | if (!sctp_style(sk, TCP)) { | |
3429 | error = -EOPNOTSUPP; | |
3430 | goto out; | |
3431 | } | |
3432 | ||
3433 | if (!sctp_sstate(sk, LISTENING)) { | |
3434 | error = -EINVAL; | |
3435 | goto out; | |
3436 | } | |
3437 | ||
8abfedd8 | 3438 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
1da177e4 LT |
3439 | |
3440 | error = sctp_wait_for_accept(sk, timeo); | |
3441 | if (error) | |
3442 | goto out; | |
3443 | ||
3444 | /* We treat the list of associations on the endpoint as the accept | |
3445 | * queue and pick the first association on the list. | |
3446 | */ | |
3447 | asoc = list_entry(ep->asocs.next, struct sctp_association, asocs); | |
3448 | ||
3449 | newsk = sp->pf->create_accept_sk(sk, asoc); | |
3450 | if (!newsk) { | |
3451 | error = -ENOMEM; | |
3452 | goto out; | |
3453 | } | |
3454 | ||
3455 | /* Populate the fields of the newsk from the oldsk and migrate the | |
3456 | * asoc to the newsk. | |
3457 | */ | |
3458 | sctp_sock_migrate(sk, newsk, asoc, SCTP_SOCKET_TCP); | |
3459 | ||
3460 | out: | |
3461 | sctp_release_sock(sk); | |
d808ad9a | 3462 | *err = error; |
1da177e4 LT |
3463 | return newsk; |
3464 | } | |
3465 | ||
3466 | /* The SCTP ioctl handler. */ | |
3467 | SCTP_STATIC int sctp_ioctl(struct sock *sk, int cmd, unsigned long arg) | |
3468 | { | |
3469 | return -ENOIOCTLCMD; | |
3470 | } | |
3471 | ||
3472 | /* This is the function which gets called during socket creation to | |
3473 | * initialized the SCTP-specific portion of the sock. | |
3474 | * The sock structure should already be zero-filled memory. | |
3475 | */ | |
3476 | SCTP_STATIC int sctp_init_sock(struct sock *sk) | |
3477 | { | |
3478 | struct sctp_endpoint *ep; | |
3479 | struct sctp_sock *sp; | |
3480 | ||
3481 | SCTP_DEBUG_PRINTK("sctp_init_sock(sk: %p)\n", sk); | |
3482 | ||
3483 | sp = sctp_sk(sk); | |
3484 | ||
3485 | /* Initialize the SCTP per socket area. */ | |
3486 | switch (sk->sk_type) { | |
3487 | case SOCK_SEQPACKET: | |
3488 | sp->type = SCTP_SOCKET_UDP; | |
3489 | break; | |
3490 | case SOCK_STREAM: | |
3491 | sp->type = SCTP_SOCKET_TCP; | |
3492 | break; | |
3493 | default: | |
3494 | return -ESOCKTNOSUPPORT; | |
3495 | } | |
3496 | ||
3497 | /* Initialize default send parameters. These parameters can be | |
3498 | * modified with the SCTP_DEFAULT_SEND_PARAM socket option. | |
3499 | */ | |
3500 | sp->default_stream = 0; | |
3501 | sp->default_ppid = 0; | |
3502 | sp->default_flags = 0; | |
3503 | sp->default_context = 0; | |
3504 | sp->default_timetolive = 0; | |
3505 | ||
6ab792f5 | 3506 | sp->default_rcv_context = 0; |
70331571 | 3507 | sp->max_burst = sctp_max_burst; |
6ab792f5 | 3508 | |
1da177e4 LT |
3509 | /* Initialize default setup parameters. These parameters |
3510 | * can be modified with the SCTP_INITMSG socket option or | |
3511 | * overridden by the SCTP_INIT CMSG. | |
3512 | */ | |
3513 | sp->initmsg.sinit_num_ostreams = sctp_max_outstreams; | |
3514 | sp->initmsg.sinit_max_instreams = sctp_max_instreams; | |
3515 | sp->initmsg.sinit_max_attempts = sctp_max_retrans_init; | |
3fd091e7 | 3516 | sp->initmsg.sinit_max_init_timeo = sctp_rto_max; |
1da177e4 LT |
3517 | |
3518 | /* Initialize default RTO related parameters. These parameters can | |
3519 | * be modified for with the SCTP_RTOINFO socket option. | |
3520 | */ | |
3fd091e7 VY |
3521 | sp->rtoinfo.srto_initial = sctp_rto_initial; |
3522 | sp->rtoinfo.srto_max = sctp_rto_max; | |
3523 | sp->rtoinfo.srto_min = sctp_rto_min; | |
1da177e4 LT |
3524 | |
3525 | /* Initialize default association related parameters. These parameters | |
3526 | * can be modified with the SCTP_ASSOCINFO socket option. | |
3527 | */ | |
3528 | sp->assocparams.sasoc_asocmaxrxt = sctp_max_retrans_association; | |
3529 | sp->assocparams.sasoc_number_peer_destinations = 0; | |
3530 | sp->assocparams.sasoc_peer_rwnd = 0; | |
3531 | sp->assocparams.sasoc_local_rwnd = 0; | |
3fd091e7 | 3532 | sp->assocparams.sasoc_cookie_life = sctp_valid_cookie_life; |
1da177e4 LT |
3533 | |
3534 | /* Initialize default event subscriptions. By default, all the | |
d808ad9a | 3535 | * options are off. |
1da177e4 LT |
3536 | */ |
3537 | memset(&sp->subscribe, 0, sizeof(struct sctp_event_subscribe)); | |
3538 | ||
3539 | /* Default Peer Address Parameters. These defaults can | |
3540 | * be modified via SCTP_PEER_ADDR_PARAMS | |
3541 | */ | |
3fd091e7 | 3542 | sp->hbinterval = sctp_hb_interval; |
52ccb8e9 FF |
3543 | sp->pathmaxrxt = sctp_max_retrans_path; |
3544 | sp->pathmtu = 0; // allow default discovery | |
3fd091e7 | 3545 | sp->sackdelay = sctp_sack_timeout; |
7bfe8bdb | 3546 | sp->sackfreq = 2; |
52ccb8e9 | 3547 | sp->param_flags = SPP_HB_ENABLE | |
d808ad9a YH |
3548 | SPP_PMTUD_ENABLE | |
3549 | SPP_SACKDELAY_ENABLE; | |
1da177e4 LT |
3550 | |
3551 | /* If enabled no SCTP message fragmentation will be performed. | |
3552 | * Configure through SCTP_DISABLE_FRAGMENTS socket option. | |
3553 | */ | |
3554 | sp->disable_fragments = 0; | |
3555 | ||
208edef6 SS |
3556 | /* Enable Nagle algorithm by default. */ |
3557 | sp->nodelay = 0; | |
1da177e4 LT |
3558 | |
3559 | /* Enable by default. */ | |
3560 | sp->v4mapped = 1; | |
3561 | ||
3562 | /* Auto-close idle associations after the configured | |
3563 | * number of seconds. A value of 0 disables this | |
3564 | * feature. Configure through the SCTP_AUTOCLOSE socket option, | |
3565 | * for UDP-style sockets only. | |
3566 | */ | |
3567 | sp->autoclose = 0; | |
3568 | ||
3569 | /* User specified fragmentation limit. */ | |
3570 | sp->user_frag = 0; | |
3571 | ||
0f3fffd8 | 3572 | sp->adaptation_ind = 0; |
1da177e4 LT |
3573 | |
3574 | sp->pf = sctp_get_pf_specific(sk->sk_family); | |
3575 | ||
3576 | /* Control variables for partial data delivery. */ | |
b6e1331f | 3577 | atomic_set(&sp->pd_mode, 0); |
1da177e4 | 3578 | skb_queue_head_init(&sp->pd_lobby); |
b6e1331f | 3579 | sp->frag_interleave = 0; |
1da177e4 LT |
3580 | |
3581 | /* Create a per socket endpoint structure. Even if we | |
3582 | * change the data structure relationships, this may still | |
3583 | * be useful for storing pre-connect address information. | |
3584 | */ | |
3585 | ep = sctp_endpoint_new(sk, GFP_KERNEL); | |
3586 | if (!ep) | |
3587 | return -ENOMEM; | |
3588 | ||
3589 | sp->ep = ep; | |
3590 | sp->hmac = NULL; | |
3591 | ||
3592 | SCTP_DBG_OBJCNT_INC(sock); | |
4d93df0a | 3593 | atomic_inc(&sctp_sockets_allocated); |
1da177e4 LT |
3594 | return 0; |
3595 | } | |
3596 | ||
3597 | /* Cleanup any SCTP per socket resources. */ | |
7d06b2e0 | 3598 | SCTP_STATIC void sctp_destroy_sock(struct sock *sk) |
1da177e4 LT |
3599 | { |
3600 | struct sctp_endpoint *ep; | |
3601 | ||
3602 | SCTP_DEBUG_PRINTK("sctp_destroy_sock(sk: %p)\n", sk); | |
3603 | ||
3604 | /* Release our hold on the endpoint. */ | |
3605 | ep = sctp_sk(sk)->ep; | |
3606 | sctp_endpoint_free(ep); | |
4d93df0a | 3607 | atomic_dec(&sctp_sockets_allocated); |
1da177e4 LT |
3608 | } |
3609 | ||
3610 | /* API 4.1.7 shutdown() - TCP Style Syntax | |
3611 | * int shutdown(int socket, int how); | |
3612 | * | |
3613 | * sd - the socket descriptor of the association to be closed. | |
3614 | * how - Specifies the type of shutdown. The values are | |
3615 | * as follows: | |
3616 | * SHUT_RD | |
3617 | * Disables further receive operations. No SCTP | |
3618 | * protocol action is taken. | |
3619 | * SHUT_WR | |
3620 | * Disables further send operations, and initiates | |
3621 | * the SCTP shutdown sequence. | |
3622 | * SHUT_RDWR | |
3623 | * Disables further send and receive operations | |
3624 | * and initiates the SCTP shutdown sequence. | |
3625 | */ | |
3626 | SCTP_STATIC void sctp_shutdown(struct sock *sk, int how) | |
3627 | { | |
3628 | struct sctp_endpoint *ep; | |
3629 | struct sctp_association *asoc; | |
3630 | ||
3631 | if (!sctp_style(sk, TCP)) | |
3632 | return; | |
3633 | ||
3634 | if (how & SEND_SHUTDOWN) { | |
3635 | ep = sctp_sk(sk)->ep; | |
3636 | if (!list_empty(&ep->asocs)) { | |
3637 | asoc = list_entry(ep->asocs.next, | |
3638 | struct sctp_association, asocs); | |
3639 | sctp_primitive_SHUTDOWN(asoc, NULL); | |
3640 | } | |
3641 | } | |
3642 | } | |
3643 | ||
3644 | /* 7.2.1 Association Status (SCTP_STATUS) | |
3645 | ||
3646 | * Applications can retrieve current status information about an | |
3647 | * association, including association state, peer receiver window size, | |
3648 | * number of unacked data chunks, and number of data chunks pending | |
3649 | * receipt. This information is read-only. | |
3650 | */ | |
3651 | static int sctp_getsockopt_sctp_status(struct sock *sk, int len, | |
3652 | char __user *optval, | |
3653 | int __user *optlen) | |
3654 | { | |
3655 | struct sctp_status status; | |
3656 | struct sctp_association *asoc = NULL; | |
3657 | struct sctp_transport *transport; | |
3658 | sctp_assoc_t associd; | |
3659 | int retval = 0; | |
3660 | ||
408f22e8 | 3661 | if (len < sizeof(status)) { |
1da177e4 LT |
3662 | retval = -EINVAL; |
3663 | goto out; | |
3664 | } | |
3665 | ||
408f22e8 NH |
3666 | len = sizeof(status); |
3667 | if (copy_from_user(&status, optval, len)) { | |
1da177e4 LT |
3668 | retval = -EFAULT; |
3669 | goto out; | |
3670 | } | |
3671 | ||
3672 | associd = status.sstat_assoc_id; | |
3673 | asoc = sctp_id2assoc(sk, associd); | |
3674 | if (!asoc) { | |
3675 | retval = -EINVAL; | |
3676 | goto out; | |
3677 | } | |
3678 | ||
3679 | transport = asoc->peer.primary_path; | |
3680 | ||
3681 | status.sstat_assoc_id = sctp_assoc2id(asoc); | |
3682 | status.sstat_state = asoc->state; | |
3683 | status.sstat_rwnd = asoc->peer.rwnd; | |
3684 | status.sstat_unackdata = asoc->unack_data; | |
3685 | ||
3686 | status.sstat_penddata = sctp_tsnmap_pending(&asoc->peer.tsn_map); | |
3687 | status.sstat_instrms = asoc->c.sinit_max_instreams; | |
3688 | status.sstat_outstrms = asoc->c.sinit_num_ostreams; | |
3689 | status.sstat_fragmentation_point = asoc->frag_point; | |
3690 | status.sstat_primary.spinfo_assoc_id = sctp_assoc2id(transport->asoc); | |
8cec6b80 AV |
3691 | memcpy(&status.sstat_primary.spinfo_address, &transport->ipaddr, |
3692 | transport->af_specific->sockaddr_len); | |
1da177e4 LT |
3693 | /* Map ipv4 address into v4-mapped-on-v6 address. */ |
3694 | sctp_get_pf_specific(sk->sk_family)->addr_v4map(sctp_sk(sk), | |
3695 | (union sctp_addr *)&status.sstat_primary.spinfo_address); | |
3f7a87d2 | 3696 | status.sstat_primary.spinfo_state = transport->state; |
1da177e4 LT |
3697 | status.sstat_primary.spinfo_cwnd = transport->cwnd; |
3698 | status.sstat_primary.spinfo_srtt = transport->srtt; | |
3699 | status.sstat_primary.spinfo_rto = jiffies_to_msecs(transport->rto); | |
52ccb8e9 | 3700 | status.sstat_primary.spinfo_mtu = transport->pathmtu; |
1da177e4 | 3701 | |
3f7a87d2 FF |
3702 | if (status.sstat_primary.spinfo_state == SCTP_UNKNOWN) |
3703 | status.sstat_primary.spinfo_state = SCTP_ACTIVE; | |
3704 | ||
1da177e4 LT |
3705 | if (put_user(len, optlen)) { |
3706 | retval = -EFAULT; | |
3707 | goto out; | |
3708 | } | |
3709 | ||
3710 | SCTP_DEBUG_PRINTK("sctp_getsockopt_sctp_status(%d): %d %d %d\n", | |
3711 | len, status.sstat_state, status.sstat_rwnd, | |
3712 | status.sstat_assoc_id); | |
3713 | ||
3714 | if (copy_to_user(optval, &status, len)) { | |
3715 | retval = -EFAULT; | |
3716 | goto out; | |
3717 | } | |
3718 | ||
3719 | out: | |
3720 | return (retval); | |
3721 | } | |
3722 | ||
3723 | ||
3724 | /* 7.2.2 Peer Address Information (SCTP_GET_PEER_ADDR_INFO) | |
3725 | * | |
3726 | * Applications can retrieve information about a specific peer address | |
3727 | * of an association, including its reachability state, congestion | |
3728 | * window, and retransmission timer values. This information is | |
3729 | * read-only. | |
3730 | */ | |
3731 | static int sctp_getsockopt_peer_addr_info(struct sock *sk, int len, | |
3732 | char __user *optval, | |
3733 | int __user *optlen) | |
3734 | { | |
3735 | struct sctp_paddrinfo pinfo; | |
3736 | struct sctp_transport *transport; | |
3737 | int retval = 0; | |
3738 | ||
408f22e8 | 3739 | if (len < sizeof(pinfo)) { |
1da177e4 LT |
3740 | retval = -EINVAL; |
3741 | goto out; | |
3742 | } | |
3743 | ||
408f22e8 NH |
3744 | len = sizeof(pinfo); |
3745 | if (copy_from_user(&pinfo, optval, len)) { | |
1da177e4 LT |
3746 | retval = -EFAULT; |
3747 | goto out; | |
3748 | } | |
3749 | ||
3750 | transport = sctp_addr_id2transport(sk, &pinfo.spinfo_address, | |
3751 | pinfo.spinfo_assoc_id); | |
3752 | if (!transport) | |
3753 | return -EINVAL; | |
3754 | ||
3755 | pinfo.spinfo_assoc_id = sctp_assoc2id(transport->asoc); | |
3f7a87d2 | 3756 | pinfo.spinfo_state = transport->state; |
1da177e4 LT |
3757 | pinfo.spinfo_cwnd = transport->cwnd; |
3758 | pinfo.spinfo_srtt = transport->srtt; | |
3759 | pinfo.spinfo_rto = jiffies_to_msecs(transport->rto); | |
52ccb8e9 | 3760 | pinfo.spinfo_mtu = transport->pathmtu; |
1da177e4 | 3761 | |
3f7a87d2 FF |
3762 | if (pinfo.spinfo_state == SCTP_UNKNOWN) |
3763 | pinfo.spinfo_state = SCTP_ACTIVE; | |
3764 | ||
1da177e4 LT |
3765 | if (put_user(len, optlen)) { |
3766 | retval = -EFAULT; | |
3767 | goto out; | |
3768 | } | |
3769 | ||
3770 | if (copy_to_user(optval, &pinfo, len)) { | |
3771 | retval = -EFAULT; | |
3772 | goto out; | |
3773 | } | |
3774 | ||
3775 | out: | |
3776 | return (retval); | |
3777 | } | |
3778 | ||
3779 | /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS) | |
3780 | * | |
3781 | * This option is a on/off flag. If enabled no SCTP message | |
3782 | * fragmentation will be performed. Instead if a message being sent | |
3783 | * exceeds the current PMTU size, the message will NOT be sent and | |
3784 | * instead a error will be indicated to the user. | |
3785 | */ | |
3786 | static int sctp_getsockopt_disable_fragments(struct sock *sk, int len, | |
3787 | char __user *optval, int __user *optlen) | |
3788 | { | |
3789 | int val; | |
3790 | ||
3791 | if (len < sizeof(int)) | |
3792 | return -EINVAL; | |
3793 | ||
3794 | len = sizeof(int); | |
3795 | val = (sctp_sk(sk)->disable_fragments == 1); | |
3796 | if (put_user(len, optlen)) | |
3797 | return -EFAULT; | |
3798 | if (copy_to_user(optval, &val, len)) | |
3799 | return -EFAULT; | |
3800 | return 0; | |
3801 | } | |
3802 | ||
3803 | /* 7.1.15 Set notification and ancillary events (SCTP_EVENTS) | |
3804 | * | |
3805 | * This socket option is used to specify various notifications and | |
3806 | * ancillary data the user wishes to receive. | |
3807 | */ | |
3808 | static int sctp_getsockopt_events(struct sock *sk, int len, char __user *optval, | |
3809 | int __user *optlen) | |
3810 | { | |
408f22e8 | 3811 | if (len < sizeof(struct sctp_event_subscribe)) |
1da177e4 | 3812 | return -EINVAL; |
408f22e8 NH |
3813 | len = sizeof(struct sctp_event_subscribe); |
3814 | if (put_user(len, optlen)) | |
3815 | return -EFAULT; | |
1da177e4 LT |
3816 | if (copy_to_user(optval, &sctp_sk(sk)->subscribe, len)) |
3817 | return -EFAULT; | |
3818 | return 0; | |
3819 | } | |
3820 | ||
3821 | /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE) | |
3822 | * | |
3823 | * This socket option is applicable to the UDP-style socket only. When | |
3824 | * set it will cause associations that are idle for more than the | |
3825 | * specified number of seconds to automatically close. An association | |
3826 | * being idle is defined an association that has NOT sent or received | |
3827 | * user data. The special value of '0' indicates that no automatic | |
3828 | * close of any associations should be performed. The option expects an | |
3829 | * integer defining the number of seconds of idle time before an | |
3830 | * association is closed. | |
3831 | */ | |
3832 | static int sctp_getsockopt_autoclose(struct sock *sk, int len, char __user *optval, int __user *optlen) | |
3833 | { | |
3834 | /* Applicable to UDP-style socket only */ | |
3835 | if (sctp_style(sk, TCP)) | |
3836 | return -EOPNOTSUPP; | |
408f22e8 | 3837 | if (len < sizeof(int)) |
1da177e4 | 3838 | return -EINVAL; |
408f22e8 NH |
3839 | len = sizeof(int); |
3840 | if (put_user(len, optlen)) | |
3841 | return -EFAULT; | |
3842 | if (copy_to_user(optval, &sctp_sk(sk)->autoclose, sizeof(int))) | |
1da177e4 LT |
3843 | return -EFAULT; |
3844 | return 0; | |
3845 | } | |
3846 | ||
3847 | /* Helper routine to branch off an association to a new socket. */ | |
3848 | SCTP_STATIC int sctp_do_peeloff(struct sctp_association *asoc, | |
3849 | struct socket **sockp) | |
3850 | { | |
3851 | struct sock *sk = asoc->base.sk; | |
3852 | struct socket *sock; | |
4f444308 | 3853 | struct inet_sock *inetsk; |
d570ee49 | 3854 | struct sctp_af *af; |
1da177e4 LT |
3855 | int err = 0; |
3856 | ||
3857 | /* An association cannot be branched off from an already peeled-off | |
3858 | * socket, nor is this supported for tcp style sockets. | |
3859 | */ | |
3860 | if (!sctp_style(sk, UDP)) | |
3861 | return -EINVAL; | |
3862 | ||
3863 | /* Create a new socket. */ | |
3864 | err = sock_create(sk->sk_family, SOCK_SEQPACKET, IPPROTO_SCTP, &sock); | |
3865 | if (err < 0) | |
3866 | return err; | |
3867 | ||
3868 | /* Populate the fields of the newsk from the oldsk and migrate the | |
3869 | * asoc to the newsk. | |
3870 | */ | |
3871 | sctp_sock_migrate(sk, sock->sk, asoc, SCTP_SOCKET_UDP_HIGH_BANDWIDTH); | |
4f444308 VY |
3872 | |
3873 | /* Make peeled-off sockets more like 1-1 accepted sockets. | |
3874 | * Set the daddr and initialize id to something more random | |
3875 | */ | |
d570ee49 VY |
3876 | af = sctp_get_af_specific(asoc->peer.primary_addr.sa.sa_family); |
3877 | af->to_sk_daddr(&asoc->peer.primary_addr, sk); | |
4f444308 | 3878 | inetsk = inet_sk(sock->sk); |
4f444308 VY |
3879 | inetsk->id = asoc->next_tsn ^ jiffies; |
3880 | ||
1da177e4 LT |
3881 | *sockp = sock; |
3882 | ||
3883 | return err; | |
3884 | } | |
3885 | ||
3886 | static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval, int __user *optlen) | |
3887 | { | |
3888 | sctp_peeloff_arg_t peeloff; | |
3889 | struct socket *newsock; | |
3890 | int retval = 0; | |
3891 | struct sctp_association *asoc; | |
3892 | ||
408f22e8 | 3893 | if (len < sizeof(sctp_peeloff_arg_t)) |
1da177e4 | 3894 | return -EINVAL; |
408f22e8 | 3895 | len = sizeof(sctp_peeloff_arg_t); |
1da177e4 LT |
3896 | if (copy_from_user(&peeloff, optval, len)) |
3897 | return -EFAULT; | |
3898 | ||
3899 | asoc = sctp_id2assoc(sk, peeloff.associd); | |
3900 | if (!asoc) { | |
3901 | retval = -EINVAL; | |
3902 | goto out; | |
3903 | } | |
3904 | ||
0dc47877 | 3905 | SCTP_DEBUG_PRINTK("%s: sk: %p asoc: %p\n", __func__, sk, asoc); |
1da177e4 LT |
3906 | |
3907 | retval = sctp_do_peeloff(asoc, &newsock); | |
3908 | if (retval < 0) | |
3909 | goto out; | |
3910 | ||
3911 | /* Map the socket to an unused fd that can be returned to the user. */ | |
3912 | retval = sock_map_fd(newsock); | |
3913 | if (retval < 0) { | |
3914 | sock_release(newsock); | |
3915 | goto out; | |
3916 | } | |
3917 | ||
3918 | SCTP_DEBUG_PRINTK("%s: sk: %p asoc: %p newsk: %p sd: %d\n", | |
0dc47877 | 3919 | __func__, sk, asoc, newsock->sk, retval); |
1da177e4 LT |
3920 | |
3921 | /* Return the fd mapped to the new socket. */ | |
3922 | peeloff.sd = retval; | |
408f22e8 NH |
3923 | if (put_user(len, optlen)) |
3924 | return -EFAULT; | |
1da177e4 LT |
3925 | if (copy_to_user(optval, &peeloff, len)) |
3926 | retval = -EFAULT; | |
3927 | ||
3928 | out: | |
3929 | return retval; | |
3930 | } | |
3931 | ||
3932 | /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS) | |
3933 | * | |
3934 | * Applications can enable or disable heartbeats for any peer address of | |
3935 | * an association, modify an address's heartbeat interval, force a | |
3936 | * heartbeat to be sent immediately, and adjust the address's maximum | |
3937 | * number of retransmissions sent before an address is considered | |
3938 | * unreachable. The following structure is used to access and modify an | |
3939 | * address's parameters: | |
3940 | * | |
3941 | * struct sctp_paddrparams { | |
52ccb8e9 FF |
3942 | * sctp_assoc_t spp_assoc_id; |
3943 | * struct sockaddr_storage spp_address; | |
3944 | * uint32_t spp_hbinterval; | |
3945 | * uint16_t spp_pathmaxrxt; | |
3946 | * uint32_t spp_pathmtu; | |
3947 | * uint32_t spp_sackdelay; | |
3948 | * uint32_t spp_flags; | |
3949 | * }; | |
3950 | * | |
3951 | * spp_assoc_id - (one-to-many style socket) This is filled in the | |
3952 | * application, and identifies the association for | |
3953 | * this query. | |
1da177e4 LT |
3954 | * spp_address - This specifies which address is of interest. |
3955 | * spp_hbinterval - This contains the value of the heartbeat interval, | |
52ccb8e9 FF |
3956 | * in milliseconds. If a value of zero |
3957 | * is present in this field then no changes are to | |
3958 | * be made to this parameter. | |
1da177e4 LT |
3959 | * spp_pathmaxrxt - This contains the maximum number of |
3960 | * retransmissions before this address shall be | |
52ccb8e9 FF |
3961 | * considered unreachable. If a value of zero |
3962 | * is present in this field then no changes are to | |
3963 | * be made to this parameter. | |
3964 | * spp_pathmtu - When Path MTU discovery is disabled the value | |
3965 | * specified here will be the "fixed" path mtu. | |
3966 | * Note that if the spp_address field is empty | |
3967 | * then all associations on this address will | |
3968 | * have this fixed path mtu set upon them. | |
3969 | * | |
3970 | * spp_sackdelay - When delayed sack is enabled, this value specifies | |
3971 | * the number of milliseconds that sacks will be delayed | |
3972 | * for. This value will apply to all addresses of an | |
3973 | * association if the spp_address field is empty. Note | |
3974 | * also, that if delayed sack is enabled and this | |
3975 | * value is set to 0, no change is made to the last | |
3976 | * recorded delayed sack timer value. | |
3977 | * | |
3978 | * spp_flags - These flags are used to control various features | |
3979 | * on an association. The flag field may contain | |
3980 | * zero or more of the following options. | |
3981 | * | |
3982 | * SPP_HB_ENABLE - Enable heartbeats on the | |
3983 | * specified address. Note that if the address | |
3984 | * field is empty all addresses for the association | |
3985 | * have heartbeats enabled upon them. | |
3986 | * | |
3987 | * SPP_HB_DISABLE - Disable heartbeats on the | |
3988 | * speicifed address. Note that if the address | |
3989 | * field is empty all addresses for the association | |
3990 | * will have their heartbeats disabled. Note also | |
3991 | * that SPP_HB_ENABLE and SPP_HB_DISABLE are | |
3992 | * mutually exclusive, only one of these two should | |
3993 | * be specified. Enabling both fields will have | |
3994 | * undetermined results. | |
3995 | * | |
3996 | * SPP_HB_DEMAND - Request a user initiated heartbeat | |
3997 | * to be made immediately. | |
3998 | * | |
3999 | * SPP_PMTUD_ENABLE - This field will enable PMTU | |
4000 | * discovery upon the specified address. Note that | |
4001 | * if the address feild is empty then all addresses | |
4002 | * on the association are effected. | |
4003 | * | |
4004 | * SPP_PMTUD_DISABLE - This field will disable PMTU | |
4005 | * discovery upon the specified address. Note that | |
4006 | * if the address feild is empty then all addresses | |
4007 | * on the association are effected. Not also that | |
4008 | * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually | |
4009 | * exclusive. Enabling both will have undetermined | |
4010 | * results. | |
4011 | * | |
4012 | * SPP_SACKDELAY_ENABLE - Setting this flag turns | |
4013 | * on delayed sack. The time specified in spp_sackdelay | |
4014 | * is used to specify the sack delay for this address. Note | |
4015 | * that if spp_address is empty then all addresses will | |
4016 | * enable delayed sack and take on the sack delay | |
4017 | * value specified in spp_sackdelay. | |
4018 | * SPP_SACKDELAY_DISABLE - Setting this flag turns | |
4019 | * off delayed sack. If the spp_address field is blank then | |
4020 | * delayed sack is disabled for the entire association. Note | |
4021 | * also that this field is mutually exclusive to | |
4022 | * SPP_SACKDELAY_ENABLE, setting both will have undefined | |
4023 | * results. | |
1da177e4 LT |
4024 | */ |
4025 | static int sctp_getsockopt_peer_addr_params(struct sock *sk, int len, | |
52ccb8e9 | 4026 | char __user *optval, int __user *optlen) |
1da177e4 | 4027 | { |
52ccb8e9 FF |
4028 | struct sctp_paddrparams params; |
4029 | struct sctp_transport *trans = NULL; | |
4030 | struct sctp_association *asoc = NULL; | |
4031 | struct sctp_sock *sp = sctp_sk(sk); | |
1da177e4 | 4032 | |
408f22e8 | 4033 | if (len < sizeof(struct sctp_paddrparams)) |
1da177e4 | 4034 | return -EINVAL; |
408f22e8 | 4035 | len = sizeof(struct sctp_paddrparams); |
1da177e4 LT |
4036 | if (copy_from_user(¶ms, optval, len)) |
4037 | return -EFAULT; | |
4038 | ||
52ccb8e9 FF |
4039 | /* If an address other than INADDR_ANY is specified, and |
4040 | * no transport is found, then the request is invalid. | |
1da177e4 | 4041 | */ |
52ccb8e9 FF |
4042 | if (!sctp_is_any(( union sctp_addr *)¶ms.spp_address)) { |
4043 | trans = sctp_addr_id2transport(sk, ¶ms.spp_address, | |
4044 | params.spp_assoc_id); | |
4045 | if (!trans) { | |
4046 | SCTP_DEBUG_PRINTK("Failed no transport\n"); | |
4047 | return -EINVAL; | |
4048 | } | |
1da177e4 LT |
4049 | } |
4050 | ||
52ccb8e9 FF |
4051 | /* Get association, if assoc_id != 0 and the socket is a one |
4052 | * to many style socket, and an association was not found, then | |
4053 | * the id was invalid. | |
4054 | */ | |
4055 | asoc = sctp_id2assoc(sk, params.spp_assoc_id); | |
4056 | if (!asoc && params.spp_assoc_id && sctp_style(sk, UDP)) { | |
4057 | SCTP_DEBUG_PRINTK("Failed no association\n"); | |
1da177e4 | 4058 | return -EINVAL; |
52ccb8e9 | 4059 | } |
1da177e4 | 4060 | |
52ccb8e9 FF |
4061 | if (trans) { |
4062 | /* Fetch transport values. */ | |
4063 | params.spp_hbinterval = jiffies_to_msecs(trans->hbinterval); | |
4064 | params.spp_pathmtu = trans->pathmtu; | |
4065 | params.spp_pathmaxrxt = trans->pathmaxrxt; | |
4066 | params.spp_sackdelay = jiffies_to_msecs(trans->sackdelay); | |
4067 | ||
4068 | /*draft-11 doesn't say what to return in spp_flags*/ | |
4069 | params.spp_flags = trans->param_flags; | |
4070 | } else if (asoc) { | |
4071 | /* Fetch association values. */ | |
4072 | params.spp_hbinterval = jiffies_to_msecs(asoc->hbinterval); | |
4073 | params.spp_pathmtu = asoc->pathmtu; | |
4074 | params.spp_pathmaxrxt = asoc->pathmaxrxt; | |
4075 | params.spp_sackdelay = jiffies_to_msecs(asoc->sackdelay); | |
4076 | ||
4077 | /*draft-11 doesn't say what to return in spp_flags*/ | |
4078 | params.spp_flags = asoc->param_flags; | |
4079 | } else { | |
4080 | /* Fetch socket values. */ | |
4081 | params.spp_hbinterval = sp->hbinterval; | |
4082 | params.spp_pathmtu = sp->pathmtu; | |
4083 | params.spp_sackdelay = sp->sackdelay; | |
4084 | params.spp_pathmaxrxt = sp->pathmaxrxt; | |
1da177e4 | 4085 | |
52ccb8e9 FF |
4086 | /*draft-11 doesn't say what to return in spp_flags*/ |
4087 | params.spp_flags = sp->param_flags; | |
4088 | } | |
1da177e4 | 4089 | |
1da177e4 LT |
4090 | if (copy_to_user(optval, ¶ms, len)) |
4091 | return -EFAULT; | |
4092 | ||
4093 | if (put_user(len, optlen)) | |
4094 | return -EFAULT; | |
4095 | ||
4096 | return 0; | |
4097 | } | |
4098 | ||
d364d927 WY |
4099 | /* |
4100 | * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK) | |
4101 | * | |
4102 | * This option will effect the way delayed acks are performed. This | |
4103 | * option allows you to get or set the delayed ack time, in | |
4104 | * milliseconds. It also allows changing the delayed ack frequency. | |
4105 | * Changing the frequency to 1 disables the delayed sack algorithm. If | |
4106 | * the assoc_id is 0, then this sets or gets the endpoints default | |
4107 | * values. If the assoc_id field is non-zero, then the set or get | |
4108 | * effects the specified association for the one to many model (the | |
4109 | * assoc_id field is ignored by the one to one model). Note that if | |
4110 | * sack_delay or sack_freq are 0 when setting this option, then the | |
4111 | * current values will remain unchanged. | |
4112 | * | |
4113 | * struct sctp_sack_info { | |
4114 | * sctp_assoc_t sack_assoc_id; | |
4115 | * uint32_t sack_delay; | |
4116 | * uint32_t sack_freq; | |
4117 | * }; | |
7708610b | 4118 | * |
d364d927 WY |
4119 | * sack_assoc_id - This parameter, indicates which association the user |
4120 | * is performing an action upon. Note that if this field's value is | |
4121 | * zero then the endpoints default value is changed (effecting future | |
4122 | * associations only). | |
7708610b | 4123 | * |
d364d927 WY |
4124 | * sack_delay - This parameter contains the number of milliseconds that |
4125 | * the user is requesting the delayed ACK timer be set to. Note that | |
4126 | * this value is defined in the standard to be between 200 and 500 | |
4127 | * milliseconds. | |
7708610b | 4128 | * |
d364d927 WY |
4129 | * sack_freq - This parameter contains the number of packets that must |
4130 | * be received before a sack is sent without waiting for the delay | |
4131 | * timer to expire. The default value for this is 2, setting this | |
4132 | * value to 1 will disable the delayed sack algorithm. | |
7708610b | 4133 | */ |
d364d927 | 4134 | static int sctp_getsockopt_delayed_ack(struct sock *sk, int len, |
7708610b FF |
4135 | char __user *optval, |
4136 | int __user *optlen) | |
4137 | { | |
d364d927 | 4138 | struct sctp_sack_info params; |
7708610b FF |
4139 | struct sctp_association *asoc = NULL; |
4140 | struct sctp_sock *sp = sctp_sk(sk); | |
4141 | ||
d364d927 WY |
4142 | if (len >= sizeof(struct sctp_sack_info)) { |
4143 | len = sizeof(struct sctp_sack_info); | |
7708610b | 4144 | |
d364d927 WY |
4145 | if (copy_from_user(¶ms, optval, len)) |
4146 | return -EFAULT; | |
4147 | } else if (len == sizeof(struct sctp_assoc_value)) { | |
4148 | printk(KERN_WARNING "SCTP: Use of struct sctp_sack_info " | |
4149 | "in delayed_ack socket option deprecated\n"); | |
4150 | printk(KERN_WARNING "SCTP: struct sctp_sack_info instead\n"); | |
4151 | if (copy_from_user(¶ms, optval, len)) | |
4152 | return -EFAULT; | |
4153 | } else | |
4154 | return - EINVAL; | |
7708610b | 4155 | |
d364d927 | 4156 | /* Get association, if sack_assoc_id != 0 and the socket is a one |
7708610b FF |
4157 | * to many style socket, and an association was not found, then |
4158 | * the id was invalid. | |
d808ad9a | 4159 | */ |
d364d927 WY |
4160 | asoc = sctp_id2assoc(sk, params.sack_assoc_id); |
4161 | if (!asoc && params.sack_assoc_id && sctp_style(sk, UDP)) | |
7708610b FF |
4162 | return -EINVAL; |
4163 | ||
4164 | if (asoc) { | |
4165 | /* Fetch association values. */ | |
d364d927 WY |
4166 | if (asoc->param_flags & SPP_SACKDELAY_ENABLE) { |
4167 | params.sack_delay = jiffies_to_msecs( | |
7708610b | 4168 | asoc->sackdelay); |
d364d927 WY |
4169 | params.sack_freq = asoc->sackfreq; |
4170 | ||
4171 | } else { | |
4172 | params.sack_delay = 0; | |
4173 | params.sack_freq = 1; | |
4174 | } | |
7708610b FF |
4175 | } else { |
4176 | /* Fetch socket values. */ | |
d364d927 WY |
4177 | if (sp->param_flags & SPP_SACKDELAY_ENABLE) { |
4178 | params.sack_delay = sp->sackdelay; | |
4179 | params.sack_freq = sp->sackfreq; | |
4180 | } else { | |
4181 | params.sack_delay = 0; | |
4182 | params.sack_freq = 1; | |
4183 | } | |
7708610b FF |
4184 | } |
4185 | ||
4186 | if (copy_to_user(optval, ¶ms, len)) | |
4187 | return -EFAULT; | |
4188 | ||
4189 | if (put_user(len, optlen)) | |
4190 | return -EFAULT; | |
4191 | ||
4192 | return 0; | |
4193 | } | |
4194 | ||
1da177e4 LT |
4195 | /* 7.1.3 Initialization Parameters (SCTP_INITMSG) |
4196 | * | |
4197 | * Applications can specify protocol parameters for the default association | |
4198 | * initialization. The option name argument to setsockopt() and getsockopt() | |
4199 | * is SCTP_INITMSG. | |
4200 | * | |
4201 | * Setting initialization parameters is effective only on an unconnected | |
4202 | * socket (for UDP-style sockets only future associations are effected | |
4203 | * by the change). With TCP-style sockets, this option is inherited by | |
4204 | * sockets derived from a listener socket. | |
4205 | */ | |
4206 | static int sctp_getsockopt_initmsg(struct sock *sk, int len, char __user *optval, int __user *optlen) | |
4207 | { | |
408f22e8 | 4208 | if (len < sizeof(struct sctp_initmsg)) |
1da177e4 | 4209 | return -EINVAL; |
408f22e8 NH |
4210 | len = sizeof(struct sctp_initmsg); |
4211 | if (put_user(len, optlen)) | |
4212 | return -EFAULT; | |
1da177e4 LT |
4213 | if (copy_to_user(optval, &sctp_sk(sk)->initmsg, len)) |
4214 | return -EFAULT; | |
4215 | return 0; | |
4216 | } | |
4217 | ||