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1da177e4 LT |
1 | /* SCTP kernel reference Implementation |
2 | * (C) Copyright IBM Corp. 2001, 2004 | |
3 | * Copyright (c) 1999-2000 Cisco, Inc. | |
4 | * Copyright (c) 1999-2001 Motorola, Inc. | |
5 | * Copyright (c) 2001-2003 Intel Corp. | |
6 | * Copyright (c) 2001-2002 Nokia, Inc. | |
7 | * Copyright (c) 2001 La Monte H.P. Yarroll | |
8 | * | |
9 | * This file is part of the SCTP kernel reference Implementation | |
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 | * | |
18 | * The SCTP reference implementation is free software; | |
19 | * you can redistribute it and/or modify it under the terms of | |
20 | * the GNU General Public License as published by | |
21 | * the Free Software Foundation; either version 2, or (at your option) | |
22 | * any later version. | |
23 | * | |
24 | * The SCTP reference implementation is distributed in the hope that it | |
25 | * will be useful, but WITHOUT ANY WARRANTY; without even the implied | |
26 | * ************************ | |
27 | * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
28 | * See the GNU General Public License for more details. | |
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 | ||
1da177e4 LT |
110 | /* Get the sndbuf space available at the time on the association. */ |
111 | static inline int sctp_wspace(struct sctp_association *asoc) | |
112 | { | |
113 | struct sock *sk = asoc->base.sk; | |
114 | int amt = 0; | |
115 | ||
4eb701df NH |
116 | if (asoc->ep->sndbuf_policy) { |
117 | /* make sure that no association uses more than sk_sndbuf */ | |
118 | amt = sk->sk_sndbuf - asoc->sndbuf_used; | |
119 | } else { | |
120 | /* do socket level accounting */ | |
121 | amt = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc); | |
122 | } | |
123 | ||
1da177e4 LT |
124 | if (amt < 0) |
125 | amt = 0; | |
4eb701df | 126 | |
1da177e4 LT |
127 | return amt; |
128 | } | |
129 | ||
130 | /* Increment the used sndbuf space count of the corresponding association by | |
131 | * the size of the outgoing data chunk. | |
132 | * Also, set the skb destructor for sndbuf accounting later. | |
133 | * | |
134 | * Since it is always 1-1 between chunk and skb, and also a new skb is always | |
135 | * allocated for chunk bundling in sctp_packet_transmit(), we can use the | |
136 | * destructor in the data chunk skb for the purpose of the sndbuf space | |
137 | * tracking. | |
138 | */ | |
139 | static inline void sctp_set_owner_w(struct sctp_chunk *chunk) | |
140 | { | |
141 | struct sctp_association *asoc = chunk->asoc; | |
142 | struct sock *sk = asoc->base.sk; | |
143 | ||
144 | /* The sndbuf space is tracked per association. */ | |
145 | sctp_association_hold(asoc); | |
146 | ||
4eb701df NH |
147 | skb_set_owner_w(chunk->skb, sk); |
148 | ||
1da177e4 LT |
149 | chunk->skb->destructor = sctp_wfree; |
150 | /* Save the chunk pointer in skb for sctp_wfree to use later. */ | |
151 | *((struct sctp_chunk **)(chunk->skb->cb)) = chunk; | |
152 | ||
4eb701df NH |
153 | asoc->sndbuf_used += SCTP_DATA_SNDSIZE(chunk) + |
154 | sizeof(struct sk_buff) + | |
155 | sizeof(struct sctp_chunk); | |
156 | ||
4eb701df | 157 | atomic_add(sizeof(struct sctp_chunk), &sk->sk_wmem_alloc); |
1da177e4 LT |
158 | } |
159 | ||
160 | /* Verify that this is a valid address. */ | |
161 | static inline int sctp_verify_addr(struct sock *sk, union sctp_addr *addr, | |
162 | int len) | |
163 | { | |
164 | struct sctp_af *af; | |
165 | ||
166 | /* Verify basic sockaddr. */ | |
167 | af = sctp_sockaddr_af(sctp_sk(sk), addr, len); | |
168 | if (!af) | |
169 | return -EINVAL; | |
170 | ||
171 | /* Is this a valid SCTP address? */ | |
5636bef7 | 172 | if (!af->addr_valid(addr, sctp_sk(sk), NULL)) |
1da177e4 LT |
173 | return -EINVAL; |
174 | ||
175 | if (!sctp_sk(sk)->pf->send_verify(sctp_sk(sk), (addr))) | |
176 | return -EINVAL; | |
177 | ||
178 | return 0; | |
179 | } | |
180 | ||
181 | /* Look up the association by its id. If this is not a UDP-style | |
182 | * socket, the ID field is always ignored. | |
183 | */ | |
184 | struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id) | |
185 | { | |
186 | struct sctp_association *asoc = NULL; | |
187 | ||
188 | /* If this is not a UDP-style socket, assoc id should be ignored. */ | |
189 | if (!sctp_style(sk, UDP)) { | |
190 | /* Return NULL if the socket state is not ESTABLISHED. It | |
191 | * could be a TCP-style listening socket or a socket which | |
192 | * hasn't yet called connect() to establish an association. | |
193 | */ | |
194 | if (!sctp_sstate(sk, ESTABLISHED)) | |
195 | return NULL; | |
196 | ||
197 | /* Get the first and the only association from the list. */ | |
198 | if (!list_empty(&sctp_sk(sk)->ep->asocs)) | |
199 | asoc = list_entry(sctp_sk(sk)->ep->asocs.next, | |
200 | struct sctp_association, asocs); | |
201 | return asoc; | |
202 | } | |
203 | ||
204 | /* Otherwise this is a UDP-style socket. */ | |
205 | if (!id || (id == (sctp_assoc_t)-1)) | |
206 | return NULL; | |
207 | ||
208 | spin_lock_bh(&sctp_assocs_id_lock); | |
209 | asoc = (struct sctp_association *)idr_find(&sctp_assocs_id, (int)id); | |
210 | spin_unlock_bh(&sctp_assocs_id_lock); | |
211 | ||
212 | if (!asoc || (asoc->base.sk != sk) || asoc->base.dead) | |
213 | return NULL; | |
214 | ||
215 | return asoc; | |
216 | } | |
217 | ||
218 | /* Look up the transport from an address and an assoc id. If both address and | |
219 | * id are specified, the associations matching the address and the id should be | |
220 | * the same. | |
221 | */ | |
222 | static struct sctp_transport *sctp_addr_id2transport(struct sock *sk, | |
223 | struct sockaddr_storage *addr, | |
224 | sctp_assoc_t id) | |
225 | { | |
226 | struct sctp_association *addr_asoc = NULL, *id_asoc = NULL; | |
227 | struct sctp_transport *transport; | |
228 | union sctp_addr *laddr = (union sctp_addr *)addr; | |
229 | ||
1da177e4 | 230 | addr_asoc = sctp_endpoint_lookup_assoc(sctp_sk(sk)->ep, |
cd4ff034 | 231 | laddr, |
1da177e4 | 232 | &transport); |
1da177e4 LT |
233 | |
234 | if (!addr_asoc) | |
235 | return NULL; | |
236 | ||
237 | id_asoc = sctp_id2assoc(sk, id); | |
238 | if (id_asoc && (id_asoc != addr_asoc)) | |
239 | return NULL; | |
240 | ||
241 | sctp_get_pf_specific(sk->sk_family)->addr_v4map(sctp_sk(sk), | |
242 | (union sctp_addr *)addr); | |
243 | ||
244 | return transport; | |
245 | } | |
246 | ||
247 | /* API 3.1.2 bind() - UDP Style Syntax | |
248 | * The syntax of bind() is, | |
249 | * | |
250 | * ret = bind(int sd, struct sockaddr *addr, int addrlen); | |
251 | * | |
252 | * sd - the socket descriptor returned by socket(). | |
253 | * addr - the address structure (struct sockaddr_in or struct | |
254 | * sockaddr_in6 [RFC 2553]), | |
255 | * addr_len - the size of the address structure. | |
256 | */ | |
3f7a87d2 | 257 | SCTP_STATIC int sctp_bind(struct sock *sk, struct sockaddr *addr, int addr_len) |
1da177e4 LT |
258 | { |
259 | int retval = 0; | |
260 | ||
261 | sctp_lock_sock(sk); | |
262 | ||
3f7a87d2 FF |
263 | SCTP_DEBUG_PRINTK("sctp_bind(sk: %p, addr: %p, addr_len: %d)\n", |
264 | sk, addr, addr_len); | |
1da177e4 LT |
265 | |
266 | /* Disallow binding twice. */ | |
267 | if (!sctp_sk(sk)->ep->base.bind_addr.port) | |
3f7a87d2 | 268 | retval = sctp_do_bind(sk, (union sctp_addr *)addr, |
1da177e4 LT |
269 | addr_len); |
270 | else | |
271 | retval = -EINVAL; | |
272 | ||
273 | sctp_release_sock(sk); | |
274 | ||
275 | return retval; | |
276 | } | |
277 | ||
278 | static long sctp_get_port_local(struct sock *, union sctp_addr *); | |
279 | ||
280 | /* Verify this is a valid sockaddr. */ | |
281 | static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt, | |
282 | union sctp_addr *addr, int len) | |
283 | { | |
284 | struct sctp_af *af; | |
285 | ||
286 | /* Check minimum size. */ | |
287 | if (len < sizeof (struct sockaddr)) | |
288 | return NULL; | |
289 | ||
290 | /* Does this PF support this AF? */ | |
291 | if (!opt->pf->af_supported(addr->sa.sa_family, opt)) | |
292 | return NULL; | |
293 | ||
294 | /* If we get this far, af is valid. */ | |
295 | af = sctp_get_af_specific(addr->sa.sa_family); | |
296 | ||
297 | if (len < af->sockaddr_len) | |
298 | return NULL; | |
299 | ||
300 | return af; | |
301 | } | |
302 | ||
303 | /* Bind a local address either to an endpoint or to an association. */ | |
304 | SCTP_STATIC int sctp_do_bind(struct sock *sk, union sctp_addr *addr, int len) | |
305 | { | |
306 | struct sctp_sock *sp = sctp_sk(sk); | |
307 | struct sctp_endpoint *ep = sp->ep; | |
308 | struct sctp_bind_addr *bp = &ep->base.bind_addr; | |
309 | struct sctp_af *af; | |
310 | unsigned short snum; | |
311 | int ret = 0; | |
312 | ||
1da177e4 LT |
313 | /* Common sockaddr verification. */ |
314 | af = sctp_sockaddr_af(sp, addr, len); | |
3f7a87d2 FF |
315 | if (!af) { |
316 | SCTP_DEBUG_PRINTK("sctp_do_bind(sk: %p, newaddr: %p, len: %d) EINVAL\n", | |
317 | sk, addr, len); | |
1da177e4 | 318 | return -EINVAL; |
3f7a87d2 FF |
319 | } |
320 | ||
321 | snum = ntohs(addr->v4.sin_port); | |
322 | ||
323 | SCTP_DEBUG_PRINTK_IPADDR("sctp_do_bind(sk: %p, new addr: ", | |
324 | ", port: %d, new port: %d, len: %d)\n", | |
325 | sk, | |
326 | addr, | |
327 | bp->port, snum, | |
328 | len); | |
1da177e4 LT |
329 | |
330 | /* PF specific bind() address verification. */ | |
331 | if (!sp->pf->bind_verify(sp, addr)) | |
332 | return -EADDRNOTAVAIL; | |
333 | ||
8b358056 VY |
334 | /* We must either be unbound, or bind to the same port. |
335 | * It's OK to allow 0 ports if we are already bound. | |
336 | * We'll just inhert an already bound port in this case | |
337 | */ | |
338 | if (bp->port) { | |
339 | if (!snum) | |
340 | snum = bp->port; | |
341 | else if (snum != bp->port) { | |
342 | SCTP_DEBUG_PRINTK("sctp_do_bind:" | |
1da177e4 LT |
343 | " New port %d does not match existing port " |
344 | "%d.\n", snum, bp->port); | |
8b358056 VY |
345 | return -EINVAL; |
346 | } | |
1da177e4 LT |
347 | } |
348 | ||
349 | if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) | |
350 | return -EACCES; | |
351 | ||
352 | /* Make sure we are allowed to bind here. | |
353 | * The function sctp_get_port_local() does duplicate address | |
354 | * detection. | |
355 | */ | |
356 | if ((ret = sctp_get_port_local(sk, addr))) { | |
357 | if (ret == (long) sk) { | |
358 | /* This endpoint has a conflicting address. */ | |
359 | return -EINVAL; | |
360 | } else { | |
361 | return -EADDRINUSE; | |
362 | } | |
363 | } | |
364 | ||
365 | /* Refresh ephemeral port. */ | |
366 | if (!bp->port) | |
367 | bp->port = inet_sk(sk)->num; | |
368 | ||
369 | /* Add the address to the bind address list. */ | |
370 | sctp_local_bh_disable(); | |
371 | sctp_write_lock(&ep->base.addr_lock); | |
372 | ||
373 | /* Use GFP_ATOMIC since BHs are disabled. */ | |
5ab7b859 | 374 | ret = sctp_add_bind_addr(bp, addr, 1, GFP_ATOMIC); |
1da177e4 LT |
375 | sctp_write_unlock(&ep->base.addr_lock); |
376 | sctp_local_bh_enable(); | |
377 | ||
378 | /* Copy back into socket for getsockname() use. */ | |
379 | if (!ret) { | |
380 | inet_sk(sk)->sport = htons(inet_sk(sk)->num); | |
381 | af->to_sk_saddr(addr, sk); | |
382 | } | |
383 | ||
384 | return ret; | |
385 | } | |
386 | ||
387 | /* ADDIP Section 4.1.1 Congestion Control of ASCONF Chunks | |
388 | * | |
d808ad9a | 389 | * R1) One and only one ASCONF Chunk MAY be in transit and unacknowledged |
1da177e4 | 390 | * at any one time. If a sender, after sending an ASCONF chunk, decides |
d808ad9a | 391 | * it needs to transfer another ASCONF Chunk, it MUST wait until the |
1da177e4 | 392 | * ASCONF-ACK Chunk returns from the previous ASCONF Chunk before sending a |
d808ad9a YH |
393 | * subsequent ASCONF. Note this restriction binds each side, so at any |
394 | * time two ASCONF may be in-transit on any given association (one sent | |
1da177e4 LT |
395 | * from each endpoint). |
396 | */ | |
397 | static int sctp_send_asconf(struct sctp_association *asoc, | |
398 | struct sctp_chunk *chunk) | |
399 | { | |
400 | int retval = 0; | |
401 | ||
402 | /* If there is an outstanding ASCONF chunk, queue it for later | |
403 | * transmission. | |
d808ad9a | 404 | */ |
1da177e4 | 405 | if (asoc->addip_last_asconf) { |
79af02c2 | 406 | list_add_tail(&chunk->list, &asoc->addip_chunk_list); |
d808ad9a | 407 | goto out; |
1da177e4 LT |
408 | } |
409 | ||
410 | /* Hold the chunk until an ASCONF_ACK is received. */ | |
411 | sctp_chunk_hold(chunk); | |
412 | retval = sctp_primitive_ASCONF(asoc, chunk); | |
413 | if (retval) | |
414 | sctp_chunk_free(chunk); | |
415 | else | |
416 | asoc->addip_last_asconf = chunk; | |
417 | ||
418 | out: | |
419 | return retval; | |
420 | } | |
421 | ||
422 | /* Add a list of addresses as bind addresses to local endpoint or | |
423 | * association. | |
424 | * | |
425 | * Basically run through each address specified in the addrs/addrcnt | |
426 | * array/length pair, determine if it is IPv6 or IPv4 and call | |
427 | * sctp_do_bind() on it. | |
428 | * | |
429 | * If any of them fails, then the operation will be reversed and the | |
430 | * ones that were added will be removed. | |
431 | * | |
432 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
433 | */ | |
04675210 | 434 | static int sctp_bindx_add(struct sock *sk, struct sockaddr *addrs, int addrcnt) |
1da177e4 LT |
435 | { |
436 | int cnt; | |
437 | int retval = 0; | |
438 | void *addr_buf; | |
439 | struct sockaddr *sa_addr; | |
440 | struct sctp_af *af; | |
441 | ||
442 | SCTP_DEBUG_PRINTK("sctp_bindx_add (sk: %p, addrs: %p, addrcnt: %d)\n", | |
443 | sk, addrs, addrcnt); | |
444 | ||
445 | addr_buf = addrs; | |
446 | for (cnt = 0; cnt < addrcnt; cnt++) { | |
447 | /* The list may contain either IPv4 or IPv6 address; | |
448 | * determine the address length for walking thru the list. | |
449 | */ | |
450 | sa_addr = (struct sockaddr *)addr_buf; | |
451 | af = sctp_get_af_specific(sa_addr->sa_family); | |
452 | if (!af) { | |
453 | retval = -EINVAL; | |
454 | goto err_bindx_add; | |
455 | } | |
456 | ||
d808ad9a | 457 | retval = sctp_do_bind(sk, (union sctp_addr *)sa_addr, |
1da177e4 LT |
458 | af->sockaddr_len); |
459 | ||
460 | addr_buf += af->sockaddr_len; | |
461 | ||
462 | err_bindx_add: | |
463 | if (retval < 0) { | |
464 | /* Failed. Cleanup the ones that have been added */ | |
465 | if (cnt > 0) | |
466 | sctp_bindx_rem(sk, addrs, cnt); | |
467 | return retval; | |
468 | } | |
469 | } | |
470 | ||
471 | return retval; | |
472 | } | |
473 | ||
474 | /* Send an ASCONF chunk with Add IP address parameters to all the peers of the | |
475 | * associations that are part of the endpoint indicating that a list of local | |
476 | * addresses are added to the endpoint. | |
477 | * | |
d808ad9a | 478 | * If any of the addresses is already in the bind address list of the |
1da177e4 LT |
479 | * association, we do not send the chunk for that association. But it will not |
480 | * affect other associations. | |
481 | * | |
482 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
483 | */ | |
d808ad9a | 484 | static int sctp_send_asconf_add_ip(struct sock *sk, |
1da177e4 LT |
485 | struct sockaddr *addrs, |
486 | int addrcnt) | |
487 | { | |
488 | struct sctp_sock *sp; | |
489 | struct sctp_endpoint *ep; | |
490 | struct sctp_association *asoc; | |
491 | struct sctp_bind_addr *bp; | |
492 | struct sctp_chunk *chunk; | |
493 | struct sctp_sockaddr_entry *laddr; | |
494 | union sctp_addr *addr; | |
dc022a98 | 495 | union sctp_addr saveaddr; |
1da177e4 LT |
496 | void *addr_buf; |
497 | struct sctp_af *af; | |
498 | struct list_head *pos; | |
499 | struct list_head *p; | |
500 | int i; | |
501 | int retval = 0; | |
502 | ||
503 | if (!sctp_addip_enable) | |
504 | return retval; | |
505 | ||
506 | sp = sctp_sk(sk); | |
507 | ep = sp->ep; | |
508 | ||
509 | SCTP_DEBUG_PRINTK("%s: (sk: %p, addrs: %p, addrcnt: %d)\n", | |
510 | __FUNCTION__, sk, addrs, addrcnt); | |
511 | ||
512 | list_for_each(pos, &ep->asocs) { | |
513 | asoc = list_entry(pos, struct sctp_association, asocs); | |
514 | ||
515 | if (!asoc->peer.asconf_capable) | |
516 | continue; | |
517 | ||
518 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_ADD_IP) | |
519 | continue; | |
520 | ||
521 | if (!sctp_state(asoc, ESTABLISHED)) | |
522 | continue; | |
523 | ||
524 | /* Check if any address in the packed array of addresses is | |
d808ad9a YH |
525 | * in the bind address list of the association. If so, |
526 | * do not send the asconf chunk to its peer, but continue with | |
1da177e4 LT |
527 | * other associations. |
528 | */ | |
529 | addr_buf = addrs; | |
530 | for (i = 0; i < addrcnt; i++) { | |
531 | addr = (union sctp_addr *)addr_buf; | |
532 | af = sctp_get_af_specific(addr->v4.sin_family); | |
533 | if (!af) { | |
534 | retval = -EINVAL; | |
535 | goto out; | |
536 | } | |
537 | ||
538 | if (sctp_assoc_lookup_laddr(asoc, addr)) | |
539 | break; | |
540 | ||
541 | addr_buf += af->sockaddr_len; | |
542 | } | |
543 | if (i < addrcnt) | |
544 | continue; | |
545 | ||
546 | /* Use the first address in bind addr list of association as | |
547 | * Address Parameter of ASCONF CHUNK. | |
548 | */ | |
549 | sctp_read_lock(&asoc->base.addr_lock); | |
550 | bp = &asoc->base.bind_addr; | |
551 | p = bp->address_list.next; | |
552 | laddr = list_entry(p, struct sctp_sockaddr_entry, list); | |
553 | sctp_read_unlock(&asoc->base.addr_lock); | |
554 | ||
5ae955cf | 555 | chunk = sctp_make_asconf_update_ip(asoc, &laddr->a, addrs, |
1da177e4 LT |
556 | addrcnt, SCTP_PARAM_ADD_IP); |
557 | if (!chunk) { | |
558 | retval = -ENOMEM; | |
559 | goto out; | |
560 | } | |
561 | ||
562 | retval = sctp_send_asconf(asoc, chunk); | |
dc022a98 SS |
563 | if (retval) |
564 | goto out; | |
1da177e4 | 565 | |
dc022a98 SS |
566 | /* Add the new addresses to the bind address list with |
567 | * use_as_src set to 0. | |
1da177e4 | 568 | */ |
dc022a98 SS |
569 | sctp_local_bh_disable(); |
570 | sctp_write_lock(&asoc->base.addr_lock); | |
571 | addr_buf = addrs; | |
572 | for (i = 0; i < addrcnt; i++) { | |
573 | addr = (union sctp_addr *)addr_buf; | |
574 | af = sctp_get_af_specific(addr->v4.sin_family); | |
575 | memcpy(&saveaddr, addr, af->sockaddr_len); | |
dc022a98 SS |
576 | retval = sctp_add_bind_addr(bp, &saveaddr, 0, |
577 | GFP_ATOMIC); | |
578 | addr_buf += af->sockaddr_len; | |
579 | } | |
580 | sctp_write_unlock(&asoc->base.addr_lock); | |
581 | sctp_local_bh_enable(); | |
1da177e4 LT |
582 | } |
583 | ||
584 | out: | |
585 | return retval; | |
586 | } | |
587 | ||
588 | /* Remove a list of addresses from bind addresses list. Do not remove the | |
589 | * last address. | |
590 | * | |
591 | * Basically run through each address specified in the addrs/addrcnt | |
592 | * array/length pair, determine if it is IPv6 or IPv4 and call | |
593 | * sctp_del_bind() on it. | |
594 | * | |
595 | * If any of them fails, then the operation will be reversed and the | |
596 | * ones that were removed will be added back. | |
597 | * | |
598 | * At least one address has to be left; if only one address is | |
599 | * available, the operation will return -EBUSY. | |
600 | * | |
601 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
602 | */ | |
04675210 | 603 | static int sctp_bindx_rem(struct sock *sk, struct sockaddr *addrs, int addrcnt) |
1da177e4 LT |
604 | { |
605 | struct sctp_sock *sp = sctp_sk(sk); | |
606 | struct sctp_endpoint *ep = sp->ep; | |
607 | int cnt; | |
608 | struct sctp_bind_addr *bp = &ep->base.bind_addr; | |
609 | int retval = 0; | |
1da177e4 | 610 | void *addr_buf; |
c9a08505 | 611 | union sctp_addr *sa_addr; |
1da177e4 LT |
612 | struct sctp_af *af; |
613 | ||
614 | SCTP_DEBUG_PRINTK("sctp_bindx_rem (sk: %p, addrs: %p, addrcnt: %d)\n", | |
615 | sk, addrs, addrcnt); | |
616 | ||
617 | addr_buf = addrs; | |
618 | for (cnt = 0; cnt < addrcnt; cnt++) { | |
619 | /* If the bind address list is empty or if there is only one | |
620 | * bind address, there is nothing more to be removed (we need | |
621 | * at least one address here). | |
622 | */ | |
623 | if (list_empty(&bp->address_list) || | |
624 | (sctp_list_single_entry(&bp->address_list))) { | |
625 | retval = -EBUSY; | |
626 | goto err_bindx_rem; | |
627 | } | |
628 | ||
c9a08505 AV |
629 | sa_addr = (union sctp_addr *)addr_buf; |
630 | af = sctp_get_af_specific(sa_addr->sa.sa_family); | |
1da177e4 LT |
631 | if (!af) { |
632 | retval = -EINVAL; | |
633 | goto err_bindx_rem; | |
634 | } | |
0304ff8a PG |
635 | |
636 | if (!af->addr_valid(sa_addr, sp, NULL)) { | |
637 | retval = -EADDRNOTAVAIL; | |
638 | goto err_bindx_rem; | |
639 | } | |
640 | ||
c9a08505 | 641 | if (sa_addr->v4.sin_port != htons(bp->port)) { |
1da177e4 LT |
642 | retval = -EINVAL; |
643 | goto err_bindx_rem; | |
644 | } | |
645 | ||
646 | /* FIXME - There is probably a need to check if sk->sk_saddr and | |
647 | * sk->sk_rcv_addr are currently set to one of the addresses to | |
648 | * be removed. This is something which needs to be looked into | |
649 | * when we are fixing the outstanding issues with multi-homing | |
650 | * socket routing and failover schemes. Refer to comments in | |
651 | * sctp_do_bind(). -daisy | |
652 | */ | |
653 | sctp_local_bh_disable(); | |
654 | sctp_write_lock(&ep->base.addr_lock); | |
655 | ||
c9a08505 | 656 | retval = sctp_del_bind_addr(bp, sa_addr); |
1da177e4 LT |
657 | |
658 | sctp_write_unlock(&ep->base.addr_lock); | |
659 | sctp_local_bh_enable(); | |
660 | ||
661 | addr_buf += af->sockaddr_len; | |
662 | err_bindx_rem: | |
663 | if (retval < 0) { | |
664 | /* Failed. Add the ones that has been removed back */ | |
665 | if (cnt > 0) | |
666 | sctp_bindx_add(sk, addrs, cnt); | |
667 | return retval; | |
668 | } | |
669 | } | |
670 | ||
671 | return retval; | |
672 | } | |
673 | ||
674 | /* Send an ASCONF chunk with Delete IP address parameters to all the peers of | |
675 | * the associations that are part of the endpoint indicating that a list of | |
676 | * local addresses are removed from the endpoint. | |
677 | * | |
d808ad9a | 678 | * If any of the addresses is already in the bind address list of the |
1da177e4 LT |
679 | * association, we do not send the chunk for that association. But it will not |
680 | * affect other associations. | |
681 | * | |
682 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
683 | */ | |
684 | static int sctp_send_asconf_del_ip(struct sock *sk, | |
685 | struct sockaddr *addrs, | |
686 | int addrcnt) | |
687 | { | |
688 | struct sctp_sock *sp; | |
689 | struct sctp_endpoint *ep; | |
690 | struct sctp_association *asoc; | |
dc022a98 | 691 | struct sctp_transport *transport; |
1da177e4 LT |
692 | struct sctp_bind_addr *bp; |
693 | struct sctp_chunk *chunk; | |
694 | union sctp_addr *laddr; | |
695 | void *addr_buf; | |
696 | struct sctp_af *af; | |
dc022a98 SS |
697 | struct list_head *pos, *pos1; |
698 | struct sctp_sockaddr_entry *saddr; | |
1da177e4 LT |
699 | int i; |
700 | int retval = 0; | |
701 | ||
702 | if (!sctp_addip_enable) | |
703 | return retval; | |
704 | ||
705 | sp = sctp_sk(sk); | |
706 | ep = sp->ep; | |
707 | ||
708 | SCTP_DEBUG_PRINTK("%s: (sk: %p, addrs: %p, addrcnt: %d)\n", | |
709 | __FUNCTION__, sk, addrs, addrcnt); | |
710 | ||
711 | list_for_each(pos, &ep->asocs) { | |
712 | asoc = list_entry(pos, struct sctp_association, asocs); | |
713 | ||
714 | if (!asoc->peer.asconf_capable) | |
715 | continue; | |
716 | ||
717 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_DEL_IP) | |
718 | continue; | |
719 | ||
720 | if (!sctp_state(asoc, ESTABLISHED)) | |
721 | continue; | |
722 | ||
723 | /* Check if any address in the packed array of addresses is | |
d808ad9a | 724 | * not present in the bind address list of the association. |
1da177e4 LT |
725 | * If so, do not send the asconf chunk to its peer, but |
726 | * continue with other associations. | |
727 | */ | |
728 | addr_buf = addrs; | |
729 | for (i = 0; i < addrcnt; i++) { | |
730 | laddr = (union sctp_addr *)addr_buf; | |
731 | af = sctp_get_af_specific(laddr->v4.sin_family); | |
732 | if (!af) { | |
733 | retval = -EINVAL; | |
734 | goto out; | |
735 | } | |
736 | ||
737 | if (!sctp_assoc_lookup_laddr(asoc, laddr)) | |
738 | break; | |
739 | ||
740 | addr_buf += af->sockaddr_len; | |
741 | } | |
742 | if (i < addrcnt) | |
743 | continue; | |
744 | ||
745 | /* Find one address in the association's bind address list | |
746 | * that is not in the packed array of addresses. This is to | |
747 | * make sure that we do not delete all the addresses in the | |
748 | * association. | |
749 | */ | |
750 | sctp_read_lock(&asoc->base.addr_lock); | |
751 | bp = &asoc->base.bind_addr; | |
752 | laddr = sctp_find_unmatch_addr(bp, (union sctp_addr *)addrs, | |
753 | addrcnt, sp); | |
754 | sctp_read_unlock(&asoc->base.addr_lock); | |
755 | if (!laddr) | |
756 | continue; | |
757 | ||
758 | chunk = sctp_make_asconf_update_ip(asoc, laddr, addrs, addrcnt, | |
759 | SCTP_PARAM_DEL_IP); | |
760 | if (!chunk) { | |
761 | retval = -ENOMEM; | |
762 | goto out; | |
763 | } | |
764 | ||
dc022a98 SS |
765 | /* Reset use_as_src flag for the addresses in the bind address |
766 | * list that are to be deleted. | |
767 | */ | |
768 | sctp_local_bh_disable(); | |
769 | sctp_write_lock(&asoc->base.addr_lock); | |
770 | addr_buf = addrs; | |
771 | for (i = 0; i < addrcnt; i++) { | |
772 | laddr = (union sctp_addr *)addr_buf; | |
773 | af = sctp_get_af_specific(laddr->v4.sin_family); | |
dc022a98 SS |
774 | list_for_each(pos1, &bp->address_list) { |
775 | saddr = list_entry(pos1, | |
776 | struct sctp_sockaddr_entry, | |
777 | list); | |
5f242a13 | 778 | if (sctp_cmp_addr_exact(&saddr->a, laddr)) |
dc022a98 SS |
779 | saddr->use_as_src = 0; |
780 | } | |
781 | addr_buf += af->sockaddr_len; | |
782 | } | |
783 | sctp_write_unlock(&asoc->base.addr_lock); | |
784 | sctp_local_bh_enable(); | |
1da177e4 | 785 | |
dc022a98 SS |
786 | /* Update the route and saddr entries for all the transports |
787 | * as some of the addresses in the bind address list are | |
788 | * about to be deleted and cannot be used as source addresses. | |
1da177e4 | 789 | */ |
dc022a98 SS |
790 | list_for_each(pos1, &asoc->peer.transport_addr_list) { |
791 | transport = list_entry(pos1, struct sctp_transport, | |
792 | transports); | |
793 | dst_release(transport->dst); | |
794 | sctp_transport_route(transport, NULL, | |
795 | sctp_sk(asoc->base.sk)); | |
796 | } | |
797 | ||
798 | retval = sctp_send_asconf(asoc, chunk); | |
1da177e4 LT |
799 | } |
800 | out: | |
801 | return retval; | |
802 | } | |
803 | ||
804 | /* Helper for tunneling sctp_bindx() requests through sctp_setsockopt() | |
805 | * | |
806 | * API 8.1 | |
807 | * int sctp_bindx(int sd, struct sockaddr *addrs, int addrcnt, | |
808 | * int flags); | |
809 | * | |
810 | * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses. | |
811 | * If the sd is an IPv6 socket, the addresses passed can either be IPv4 | |
812 | * or IPv6 addresses. | |
813 | * | |
814 | * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see | |
815 | * Section 3.1.2 for this usage. | |
816 | * | |
817 | * addrs is a pointer to an array of one or more socket addresses. Each | |
818 | * address is contained in its appropriate structure (i.e. struct | |
819 | * sockaddr_in or struct sockaddr_in6) the family of the address type | |
23c435f7 | 820 | * must be used to distinguish the address length (note that this |
1da177e4 LT |
821 | * representation is termed a "packed array" of addresses). The caller |
822 | * specifies the number of addresses in the array with addrcnt. | |
823 | * | |
824 | * On success, sctp_bindx() returns 0. On failure, sctp_bindx() returns | |
825 | * -1, and sets errno to the appropriate error code. | |
826 | * | |
827 | * For SCTP, the port given in each socket address must be the same, or | |
828 | * sctp_bindx() will fail, setting errno to EINVAL. | |
829 | * | |
830 | * The flags parameter is formed from the bitwise OR of zero or more of | |
831 | * the following currently defined flags: | |
832 | * | |
833 | * SCTP_BINDX_ADD_ADDR | |
834 | * | |
835 | * SCTP_BINDX_REM_ADDR | |
836 | * | |
837 | * SCTP_BINDX_ADD_ADDR directs SCTP to add the given addresses to the | |
838 | * association, and SCTP_BINDX_REM_ADDR directs SCTP to remove the given | |
839 | * addresses from the association. The two flags are mutually exclusive; | |
840 | * if both are given, sctp_bindx() will fail with EINVAL. A caller may | |
841 | * not remove all addresses from an association; sctp_bindx() will | |
842 | * reject such an attempt with EINVAL. | |
843 | * | |
844 | * An application can use sctp_bindx(SCTP_BINDX_ADD_ADDR) to associate | |
845 | * additional addresses with an endpoint after calling bind(). Or use | |
846 | * sctp_bindx(SCTP_BINDX_REM_ADDR) to remove some addresses a listening | |
847 | * socket is associated with so that no new association accepted will be | |
848 | * associated with those addresses. If the endpoint supports dynamic | |
849 | * address a SCTP_BINDX_REM_ADDR or SCTP_BINDX_ADD_ADDR may cause a | |
850 | * endpoint to send the appropriate message to the peer to change the | |
851 | * peers address lists. | |
852 | * | |
853 | * Adding and removing addresses from a connected association is | |
854 | * optional functionality. Implementations that do not support this | |
855 | * functionality should return EOPNOTSUPP. | |
856 | * | |
857 | * Basically do nothing but copying the addresses from user to kernel | |
858 | * land and invoking either sctp_bindx_add() or sctp_bindx_rem() on the sk. | |
3f7a87d2 FF |
859 | * This is used for tunneling the sctp_bindx() request through sctp_setsockopt() |
860 | * from userspace. | |
1da177e4 LT |
861 | * |
862 | * We don't use copy_from_user() for optimization: we first do the | |
863 | * sanity checks (buffer size -fast- and access check-healthy | |
864 | * pointer); if all of those succeed, then we can alloc the memory | |
865 | * (expensive operation) needed to copy the data to kernel. Then we do | |
866 | * the copying without checking the user space area | |
867 | * (__copy_from_user()). | |
868 | * | |
869 | * On exit there is no need to do sockfd_put(), sys_setsockopt() does | |
870 | * it. | |
871 | * | |
872 | * sk The sk of the socket | |
873 | * addrs The pointer to the addresses in user land | |
874 | * addrssize Size of the addrs buffer | |
875 | * op Operation to perform (add or remove, see the flags of | |
876 | * sctp_bindx) | |
877 | * | |
878 | * Returns 0 if ok, <0 errno code on error. | |
879 | */ | |
880 | SCTP_STATIC int sctp_setsockopt_bindx(struct sock* sk, | |
881 | struct sockaddr __user *addrs, | |
882 | int addrs_size, int op) | |
883 | { | |
884 | struct sockaddr *kaddrs; | |
885 | int err; | |
886 | int addrcnt = 0; | |
887 | int walk_size = 0; | |
888 | struct sockaddr *sa_addr; | |
889 | void *addr_buf; | |
890 | struct sctp_af *af; | |
891 | ||
892 | SCTP_DEBUG_PRINTK("sctp_setsocktopt_bindx: sk %p addrs %p" | |
893 | " addrs_size %d opt %d\n", sk, addrs, addrs_size, op); | |
894 | ||
895 | if (unlikely(addrs_size <= 0)) | |
896 | return -EINVAL; | |
897 | ||
898 | /* Check the user passed a healthy pointer. */ | |
899 | if (unlikely(!access_ok(VERIFY_READ, addrs, addrs_size))) | |
900 | return -EFAULT; | |
901 | ||
902 | /* Alloc space for the address array in kernel memory. */ | |
8b3a7005 | 903 | kaddrs = kmalloc(addrs_size, GFP_KERNEL); |
1da177e4 LT |
904 | if (unlikely(!kaddrs)) |
905 | return -ENOMEM; | |
906 | ||
907 | if (__copy_from_user(kaddrs, addrs, addrs_size)) { | |
908 | kfree(kaddrs); | |
909 | return -EFAULT; | |
910 | } | |
911 | ||
d808ad9a | 912 | /* Walk through the addrs buffer and count the number of addresses. */ |
1da177e4 LT |
913 | addr_buf = kaddrs; |
914 | while (walk_size < addrs_size) { | |
915 | sa_addr = (struct sockaddr *)addr_buf; | |
916 | af = sctp_get_af_specific(sa_addr->sa_family); | |
917 | ||
918 | /* If the address family is not supported or if this address | |
919 | * causes the address buffer to overflow return EINVAL. | |
d808ad9a | 920 | */ |
1da177e4 LT |
921 | if (!af || (walk_size + af->sockaddr_len) > addrs_size) { |
922 | kfree(kaddrs); | |
923 | return -EINVAL; | |
924 | } | |
925 | addrcnt++; | |
926 | addr_buf += af->sockaddr_len; | |
927 | walk_size += af->sockaddr_len; | |
928 | } | |
929 | ||
930 | /* Do the work. */ | |
931 | switch (op) { | |
932 | case SCTP_BINDX_ADD_ADDR: | |
933 | err = sctp_bindx_add(sk, kaddrs, addrcnt); | |
934 | if (err) | |
935 | goto out; | |
936 | err = sctp_send_asconf_add_ip(sk, kaddrs, addrcnt); | |
937 | break; | |
938 | ||
939 | case SCTP_BINDX_REM_ADDR: | |
940 | err = sctp_bindx_rem(sk, kaddrs, addrcnt); | |
941 | if (err) | |
942 | goto out; | |
943 | err = sctp_send_asconf_del_ip(sk, kaddrs, addrcnt); | |
944 | break; | |
945 | ||
946 | default: | |
947 | err = -EINVAL; | |
948 | break; | |
3ff50b79 | 949 | } |
1da177e4 LT |
950 | |
951 | out: | |
952 | kfree(kaddrs); | |
953 | ||
954 | return err; | |
955 | } | |
956 | ||
3f7a87d2 FF |
957 | /* __sctp_connect(struct sock* sk, struct sockaddr *kaddrs, int addrs_size) |
958 | * | |
959 | * Common routine for handling connect() and sctp_connectx(). | |
960 | * Connect will come in with just a single address. | |
961 | */ | |
962 | static int __sctp_connect(struct sock* sk, | |
963 | struct sockaddr *kaddrs, | |
964 | int addrs_size) | |
965 | { | |
966 | struct sctp_sock *sp; | |
967 | struct sctp_endpoint *ep; | |
968 | struct sctp_association *asoc = NULL; | |
969 | struct sctp_association *asoc2; | |
970 | struct sctp_transport *transport; | |
971 | union sctp_addr to; | |
972 | struct sctp_af *af; | |
973 | sctp_scope_t scope; | |
974 | long timeo; | |
975 | int err = 0; | |
976 | int addrcnt = 0; | |
977 | int walk_size = 0; | |
4bdf4b5f | 978 | union sctp_addr *sa_addr; |
3f7a87d2 | 979 | void *addr_buf; |
16d00fb7 | 980 | unsigned short port; |
f50f95ca | 981 | unsigned int f_flags = 0; |
3f7a87d2 FF |
982 | |
983 | sp = sctp_sk(sk); | |
984 | ep = sp->ep; | |
985 | ||
986 | /* connect() cannot be done on a socket that is already in ESTABLISHED | |
987 | * state - UDP-style peeled off socket or a TCP-style socket that | |
988 | * is already connected. | |
989 | * It cannot be done even on a TCP-style listening socket. | |
990 | */ | |
991 | if (sctp_sstate(sk, ESTABLISHED) || | |
992 | (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))) { | |
993 | err = -EISCONN; | |
994 | goto out_free; | |
995 | } | |
996 | ||
997 | /* Walk through the addrs buffer and count the number of addresses. */ | |
998 | addr_buf = kaddrs; | |
999 | while (walk_size < addrs_size) { | |
4bdf4b5f AV |
1000 | sa_addr = (union sctp_addr *)addr_buf; |
1001 | af = sctp_get_af_specific(sa_addr->sa.sa_family); | |
16d00fb7 | 1002 | port = ntohs(sa_addr->v4.sin_port); |
3f7a87d2 FF |
1003 | |
1004 | /* If the address family is not supported or if this address | |
1005 | * causes the address buffer to overflow return EINVAL. | |
1006 | */ | |
1007 | if (!af || (walk_size + af->sockaddr_len) > addrs_size) { | |
1008 | err = -EINVAL; | |
1009 | goto out_free; | |
1010 | } | |
1011 | ||
4bdf4b5f | 1012 | err = sctp_verify_addr(sk, sa_addr, af->sockaddr_len); |
3f7a87d2 FF |
1013 | if (err) |
1014 | goto out_free; | |
1015 | ||
16d00fb7 VY |
1016 | /* Make sure the destination port is correctly set |
1017 | * in all addresses. | |
1018 | */ | |
1019 | if (asoc && asoc->peer.port && asoc->peer.port != port) | |
1020 | goto out_free; | |
1021 | ||
3f7a87d2 | 1022 | memcpy(&to, sa_addr, af->sockaddr_len); |
3f7a87d2 FF |
1023 | |
1024 | /* Check if there already is a matching association on the | |
1025 | * endpoint (other than the one created here). | |
1026 | */ | |
cd4ff034 | 1027 | asoc2 = sctp_endpoint_lookup_assoc(ep, sa_addr, &transport); |
3f7a87d2 FF |
1028 | if (asoc2 && asoc2 != asoc) { |
1029 | if (asoc2->state >= SCTP_STATE_ESTABLISHED) | |
1030 | err = -EISCONN; | |
1031 | else | |
1032 | err = -EALREADY; | |
1033 | goto out_free; | |
1034 | } | |
1035 | ||
1036 | /* If we could not find a matching association on the endpoint, | |
1037 | * make sure that there is no peeled-off association matching | |
1038 | * the peer address even on another socket. | |
1039 | */ | |
6c7be55c | 1040 | if (sctp_endpoint_is_peeled_off(ep, sa_addr)) { |
3f7a87d2 FF |
1041 | err = -EADDRNOTAVAIL; |
1042 | goto out_free; | |
1043 | } | |
1044 | ||
1045 | if (!asoc) { | |
1046 | /* If a bind() or sctp_bindx() is not called prior to | |
1047 | * an sctp_connectx() call, the system picks an | |
1048 | * ephemeral port and will choose an address set | |
1049 | * equivalent to binding with a wildcard address. | |
1050 | */ | |
1051 | if (!ep->base.bind_addr.port) { | |
1052 | if (sctp_autobind(sk)) { | |
1053 | err = -EAGAIN; | |
1054 | goto out_free; | |
1055 | } | |
64a0c1c8 ISJ |
1056 | } else { |
1057 | /* | |
d808ad9a YH |
1058 | * If an unprivileged user inherits a 1-many |
1059 | * style socket with open associations on a | |
1060 | * privileged port, it MAY be permitted to | |
1061 | * accept new associations, but it SHOULD NOT | |
64a0c1c8 ISJ |
1062 | * be permitted to open new associations. |
1063 | */ | |
1064 | if (ep->base.bind_addr.port < PROT_SOCK && | |
1065 | !capable(CAP_NET_BIND_SERVICE)) { | |
1066 | err = -EACCES; | |
1067 | goto out_free; | |
1068 | } | |
3f7a87d2 FF |
1069 | } |
1070 | ||
dce116ae | 1071 | scope = sctp_scope(sa_addr); |
3f7a87d2 FF |
1072 | asoc = sctp_association_new(ep, sk, scope, GFP_KERNEL); |
1073 | if (!asoc) { | |
1074 | err = -ENOMEM; | |
1075 | goto out_free; | |
1076 | } | |
1077 | } | |
1078 | ||
1079 | /* Prime the peer's transport structures. */ | |
4bdf4b5f | 1080 | transport = sctp_assoc_add_peer(asoc, sa_addr, GFP_KERNEL, |
3f7a87d2 FF |
1081 | SCTP_UNKNOWN); |
1082 | if (!transport) { | |
1083 | err = -ENOMEM; | |
1084 | goto out_free; | |
1085 | } | |
1086 | ||
1087 | addrcnt++; | |
1088 | addr_buf += af->sockaddr_len; | |
1089 | walk_size += af->sockaddr_len; | |
1090 | } | |
1091 | ||
1092 | err = sctp_assoc_set_bind_addr_from_ep(asoc, GFP_KERNEL); | |
1093 | if (err < 0) { | |
1094 | goto out_free; | |
1095 | } | |
1096 | ||
1097 | err = sctp_primitive_ASSOCIATE(asoc, NULL); | |
1098 | if (err < 0) { | |
1099 | goto out_free; | |
1100 | } | |
1101 | ||
1102 | /* Initialize sk's dport and daddr for getpeername() */ | |
1103 | inet_sk(sk)->dport = htons(asoc->peer.port); | |
1104 | af = sctp_get_af_specific(to.sa.sa_family); | |
1105 | af->to_sk_daddr(&to, sk); | |
8de8c873 | 1106 | sk->sk_err = 0; |
3f7a87d2 | 1107 | |
f50f95ca VY |
1108 | /* in-kernel sockets don't generally have a file allocated to them |
1109 | * if all they do is call sock_create_kern(). | |
1110 | */ | |
1111 | if (sk->sk_socket->file) | |
1112 | f_flags = sk->sk_socket->file->f_flags; | |
1113 | ||
1114 | timeo = sock_sndtimeo(sk, f_flags & O_NONBLOCK); | |
1115 | ||
3f7a87d2 FF |
1116 | err = sctp_wait_for_connect(asoc, &timeo); |
1117 | ||
1118 | /* Don't free association on exit. */ | |
1119 | asoc = NULL; | |
1120 | ||
1121 | out_free: | |
1122 | ||
1123 | SCTP_DEBUG_PRINTK("About to exit __sctp_connect() free asoc: %p" | |
d808ad9a YH |
1124 | " kaddrs: %p err: %d\n", |
1125 | asoc, kaddrs, err); | |
3f7a87d2 FF |
1126 | if (asoc) |
1127 | sctp_association_free(asoc); | |
1128 | return err; | |
1129 | } | |
1130 | ||
1131 | /* Helper for tunneling sctp_connectx() requests through sctp_setsockopt() | |
1132 | * | |
1133 | * API 8.9 | |
1134 | * int sctp_connectx(int sd, struct sockaddr *addrs, int addrcnt); | |
1135 | * | |
1136 | * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses. | |
1137 | * If the sd is an IPv6 socket, the addresses passed can either be IPv4 | |
1138 | * or IPv6 addresses. | |
1139 | * | |
1140 | * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see | |
1141 | * Section 3.1.2 for this usage. | |
1142 | * | |
1143 | * addrs is a pointer to an array of one or more socket addresses. Each | |
1144 | * address is contained in its appropriate structure (i.e. struct | |
1145 | * sockaddr_in or struct sockaddr_in6) the family of the address type | |
1146 | * must be used to distengish the address length (note that this | |
1147 | * representation is termed a "packed array" of addresses). The caller | |
1148 | * specifies the number of addresses in the array with addrcnt. | |
1149 | * | |
1150 | * On success, sctp_connectx() returns 0. On failure, sctp_connectx() returns | |
1151 | * -1, and sets errno to the appropriate error code. | |
1152 | * | |
1153 | * For SCTP, the port given in each socket address must be the same, or | |
1154 | * sctp_connectx() will fail, setting errno to EINVAL. | |
1155 | * | |
1156 | * An application can use sctp_connectx to initiate an association with | |
1157 | * an endpoint that is multi-homed. Much like sctp_bindx() this call | |
1158 | * allows a caller to specify multiple addresses at which a peer can be | |
1159 | * reached. The way the SCTP stack uses the list of addresses to set up | |
1160 | * the association is implementation dependant. This function only | |
1161 | * specifies that the stack will try to make use of all the addresses in | |
1162 | * the list when needed. | |
1163 | * | |
1164 | * Note that the list of addresses passed in is only used for setting up | |
1165 | * the association. It does not necessarily equal the set of addresses | |
1166 | * the peer uses for the resulting association. If the caller wants to | |
1167 | * find out the set of peer addresses, it must use sctp_getpaddrs() to | |
1168 | * retrieve them after the association has been set up. | |
1169 | * | |
1170 | * Basically do nothing but copying the addresses from user to kernel | |
1171 | * land and invoking either sctp_connectx(). This is used for tunneling | |
1172 | * the sctp_connectx() request through sctp_setsockopt() from userspace. | |
1173 | * | |
1174 | * We don't use copy_from_user() for optimization: we first do the | |
1175 | * sanity checks (buffer size -fast- and access check-healthy | |
1176 | * pointer); if all of those succeed, then we can alloc the memory | |
1177 | * (expensive operation) needed to copy the data to kernel. Then we do | |
1178 | * the copying without checking the user space area | |
1179 | * (__copy_from_user()). | |
1180 | * | |
1181 | * On exit there is no need to do sockfd_put(), sys_setsockopt() does | |
1182 | * it. | |
1183 | * | |
1184 | * sk The sk of the socket | |
1185 | * addrs The pointer to the addresses in user land | |
1186 | * addrssize Size of the addrs buffer | |
1187 | * | |
1188 | * Returns 0 if ok, <0 errno code on error. | |
1189 | */ | |
1190 | SCTP_STATIC int sctp_setsockopt_connectx(struct sock* sk, | |
1191 | struct sockaddr __user *addrs, | |
1192 | int addrs_size) | |
1193 | { | |
1194 | int err = 0; | |
1195 | struct sockaddr *kaddrs; | |
1196 | ||
1197 | SCTP_DEBUG_PRINTK("%s - sk %p addrs %p addrs_size %d\n", | |
1198 | __FUNCTION__, sk, addrs, addrs_size); | |
1199 | ||
1200 | if (unlikely(addrs_size <= 0)) | |
1201 | return -EINVAL; | |
1202 | ||
1203 | /* Check the user passed a healthy pointer. */ | |
1204 | if (unlikely(!access_ok(VERIFY_READ, addrs, addrs_size))) | |
1205 | return -EFAULT; | |
1206 | ||
1207 | /* Alloc space for the address array in kernel memory. */ | |
8b3a7005 | 1208 | kaddrs = kmalloc(addrs_size, GFP_KERNEL); |
3f7a87d2 FF |
1209 | if (unlikely(!kaddrs)) |
1210 | return -ENOMEM; | |
1211 | ||
1212 | if (__copy_from_user(kaddrs, addrs, addrs_size)) { | |
1213 | err = -EFAULT; | |
1214 | } else { | |
1215 | err = __sctp_connect(sk, kaddrs, addrs_size); | |
1216 | } | |
1217 | ||
1218 | kfree(kaddrs); | |
1219 | return err; | |
1220 | } | |
1221 | ||
1da177e4 LT |
1222 | /* API 3.1.4 close() - UDP Style Syntax |
1223 | * Applications use close() to perform graceful shutdown (as described in | |
1224 | * Section 10.1 of [SCTP]) on ALL the associations currently represented | |
1225 | * by a UDP-style socket. | |
1226 | * | |
1227 | * The syntax is | |
1228 | * | |
1229 | * ret = close(int sd); | |
1230 | * | |
1231 | * sd - the socket descriptor of the associations to be closed. | |
1232 | * | |
1233 | * To gracefully shutdown a specific association represented by the | |
1234 | * UDP-style socket, an application should use the sendmsg() call, | |
1235 | * passing no user data, but including the appropriate flag in the | |
1236 | * ancillary data (see Section xxxx). | |
1237 | * | |
1238 | * If sd in the close() call is a branched-off socket representing only | |
1239 | * one association, the shutdown is performed on that association only. | |
1240 | * | |
1241 | * 4.1.6 close() - TCP Style Syntax | |
1242 | * | |
1243 | * Applications use close() to gracefully close down an association. | |
1244 | * | |
1245 | * The syntax is: | |
1246 | * | |
1247 | * int close(int sd); | |
1248 | * | |
1249 | * sd - the socket descriptor of the association to be closed. | |
1250 | * | |
1251 | * After an application calls close() on a socket descriptor, no further | |
1252 | * socket operations will succeed on that descriptor. | |
1253 | * | |
1254 | * API 7.1.4 SO_LINGER | |
1255 | * | |
1256 | * An application using the TCP-style socket can use this option to | |
1257 | * perform the SCTP ABORT primitive. The linger option structure is: | |
1258 | * | |
1259 | * struct linger { | |
1260 | * int l_onoff; // option on/off | |
1261 | * int l_linger; // linger time | |
1262 | * }; | |
1263 | * | |
1264 | * To enable the option, set l_onoff to 1. If the l_linger value is set | |
1265 | * to 0, calling close() is the same as the ABORT primitive. If the | |
1266 | * value is set to a negative value, the setsockopt() call will return | |
1267 | * an error. If the value is set to a positive value linger_time, the | |
1268 | * close() can be blocked for at most linger_time ms. If the graceful | |
1269 | * shutdown phase does not finish during this period, close() will | |
1270 | * return but the graceful shutdown phase continues in the system. | |
1271 | */ | |
1272 | SCTP_STATIC void sctp_close(struct sock *sk, long timeout) | |
1273 | { | |
1274 | struct sctp_endpoint *ep; | |
1275 | struct sctp_association *asoc; | |
1276 | struct list_head *pos, *temp; | |
1277 | ||
1278 | SCTP_DEBUG_PRINTK("sctp_close(sk: 0x%p, timeout:%ld)\n", sk, timeout); | |
1279 | ||
1280 | sctp_lock_sock(sk); | |
1281 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1282 | ||
1283 | ep = sctp_sk(sk)->ep; | |
1284 | ||
61c9fed4 | 1285 | /* Walk all associations on an endpoint. */ |
1da177e4 LT |
1286 | list_for_each_safe(pos, temp, &ep->asocs) { |
1287 | asoc = list_entry(pos, struct sctp_association, asocs); | |
1288 | ||
1289 | if (sctp_style(sk, TCP)) { | |
1290 | /* A closed association can still be in the list if | |
1291 | * it belongs to a TCP-style listening socket that is | |
1292 | * not yet accepted. If so, free it. If not, send an | |
1293 | * ABORT or SHUTDOWN based on the linger options. | |
1294 | */ | |
1295 | if (sctp_state(asoc, CLOSED)) { | |
1296 | sctp_unhash_established(asoc); | |
1297 | sctp_association_free(asoc); | |
b89498a1 VY |
1298 | continue; |
1299 | } | |
1300 | } | |
1da177e4 | 1301 | |
b9ac8672 SS |
1302 | if (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime) { |
1303 | struct sctp_chunk *chunk; | |
1304 | ||
1305 | chunk = sctp_make_abort_user(asoc, NULL, 0); | |
1306 | if (chunk) | |
1307 | sctp_primitive_ABORT(asoc, chunk); | |
1308 | } else | |
1da177e4 LT |
1309 | sctp_primitive_SHUTDOWN(asoc, NULL); |
1310 | } | |
1311 | ||
1312 | /* Clean up any skbs sitting on the receive queue. */ | |
1313 | sctp_queue_purge_ulpevents(&sk->sk_receive_queue); | |
1314 | sctp_queue_purge_ulpevents(&sctp_sk(sk)->pd_lobby); | |
1315 | ||
1316 | /* On a TCP-style socket, block for at most linger_time if set. */ | |
1317 | if (sctp_style(sk, TCP) && timeout) | |
1318 | sctp_wait_for_close(sk, timeout); | |
1319 | ||
1320 | /* This will run the backlog queue. */ | |
1321 | sctp_release_sock(sk); | |
1322 | ||
1323 | /* Supposedly, no process has access to the socket, but | |
1324 | * the net layers still may. | |
1325 | */ | |
1326 | sctp_local_bh_disable(); | |
1327 | sctp_bh_lock_sock(sk); | |
1328 | ||
1329 | /* Hold the sock, since sk_common_release() will put sock_put() | |
1330 | * and we have just a little more cleanup. | |
1331 | */ | |
1332 | sock_hold(sk); | |
1333 | sk_common_release(sk); | |
1334 | ||
1335 | sctp_bh_unlock_sock(sk); | |
1336 | sctp_local_bh_enable(); | |
1337 | ||
1338 | sock_put(sk); | |
1339 | ||
1340 | SCTP_DBG_OBJCNT_DEC(sock); | |
1341 | } | |
1342 | ||
1343 | /* Handle EPIPE error. */ | |
1344 | static int sctp_error(struct sock *sk, int flags, int err) | |
1345 | { | |
1346 | if (err == -EPIPE) | |
1347 | err = sock_error(sk) ? : -EPIPE; | |
1348 | if (err == -EPIPE && !(flags & MSG_NOSIGNAL)) | |
1349 | send_sig(SIGPIPE, current, 0); | |
1350 | return err; | |
1351 | } | |
1352 | ||
1353 | /* API 3.1.3 sendmsg() - UDP Style Syntax | |
1354 | * | |
1355 | * An application uses sendmsg() and recvmsg() calls to transmit data to | |
1356 | * and receive data from its peer. | |
1357 | * | |
1358 | * ssize_t sendmsg(int socket, const struct msghdr *message, | |
1359 | * int flags); | |
1360 | * | |
1361 | * socket - the socket descriptor of the endpoint. | |
1362 | * message - pointer to the msghdr structure which contains a single | |
1363 | * user message and possibly some ancillary data. | |
1364 | * | |
1365 | * See Section 5 for complete description of the data | |
1366 | * structures. | |
1367 | * | |
1368 | * flags - flags sent or received with the user message, see Section | |
1369 | * 5 for complete description of the flags. | |
1370 | * | |
1371 | * Note: This function could use a rewrite especially when explicit | |
1372 | * connect support comes in. | |
1373 | */ | |
1374 | /* BUG: We do not implement the equivalent of sk_stream_wait_memory(). */ | |
1375 | ||
1376 | SCTP_STATIC int sctp_msghdr_parse(const struct msghdr *, sctp_cmsgs_t *); | |
1377 | ||
1378 | SCTP_STATIC int sctp_sendmsg(struct kiocb *iocb, struct sock *sk, | |
1379 | struct msghdr *msg, size_t msg_len) | |
1380 | { | |
1381 | struct sctp_sock *sp; | |
1382 | struct sctp_endpoint *ep; | |
1383 | struct sctp_association *new_asoc=NULL, *asoc=NULL; | |
1384 | struct sctp_transport *transport, *chunk_tp; | |
1385 | struct sctp_chunk *chunk; | |
dce116ae | 1386 | union sctp_addr to; |
1da177e4 LT |
1387 | struct sockaddr *msg_name = NULL; |
1388 | struct sctp_sndrcvinfo default_sinfo = { 0 }; | |
1389 | struct sctp_sndrcvinfo *sinfo; | |
1390 | struct sctp_initmsg *sinit; | |
1391 | sctp_assoc_t associd = 0; | |
1392 | sctp_cmsgs_t cmsgs = { NULL }; | |
1393 | int err; | |
1394 | sctp_scope_t scope; | |
1395 | long timeo; | |
1396 | __u16 sinfo_flags = 0; | |
1397 | struct sctp_datamsg *datamsg; | |
1398 | struct list_head *pos; | |
1399 | int msg_flags = msg->msg_flags; | |
1400 | ||
1401 | SCTP_DEBUG_PRINTK("sctp_sendmsg(sk: %p, msg: %p, msg_len: %zu)\n", | |
1402 | sk, msg, msg_len); | |
1403 | ||
1404 | err = 0; | |
1405 | sp = sctp_sk(sk); | |
1406 | ep = sp->ep; | |
1407 | ||
3f7a87d2 | 1408 | SCTP_DEBUG_PRINTK("Using endpoint: %p.\n", ep); |
1da177e4 LT |
1409 | |
1410 | /* We cannot send a message over a TCP-style listening socket. */ | |
1411 | if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING)) { | |
1412 | err = -EPIPE; | |
1413 | goto out_nounlock; | |
1414 | } | |
1415 | ||
1416 | /* Parse out the SCTP CMSGs. */ | |
1417 | err = sctp_msghdr_parse(msg, &cmsgs); | |
1418 | ||
1419 | if (err) { | |
1420 | SCTP_DEBUG_PRINTK("msghdr parse err = %x\n", err); | |
1421 | goto out_nounlock; | |
1422 | } | |
1423 | ||
1424 | /* Fetch the destination address for this packet. This | |
1425 | * address only selects the association--it is not necessarily | |
1426 | * the address we will send to. | |
1427 | * For a peeled-off socket, msg_name is ignored. | |
1428 | */ | |
1429 | if (!sctp_style(sk, UDP_HIGH_BANDWIDTH) && msg->msg_name) { | |
1430 | int msg_namelen = msg->msg_namelen; | |
1431 | ||
1432 | err = sctp_verify_addr(sk, (union sctp_addr *)msg->msg_name, | |
1433 | msg_namelen); | |
1434 | if (err) | |
1435 | return err; | |
1436 | ||
1437 | if (msg_namelen > sizeof(to)) | |
1438 | msg_namelen = sizeof(to); | |
1439 | memcpy(&to, msg->msg_name, msg_namelen); | |
1da177e4 LT |
1440 | msg_name = msg->msg_name; |
1441 | } | |
1442 | ||
1443 | sinfo = cmsgs.info; | |
1444 | sinit = cmsgs.init; | |
1445 | ||
1446 | /* Did the user specify SNDRCVINFO? */ | |
1447 | if (sinfo) { | |
1448 | sinfo_flags = sinfo->sinfo_flags; | |
1449 | associd = sinfo->sinfo_assoc_id; | |
1450 | } | |
1451 | ||
1452 | SCTP_DEBUG_PRINTK("msg_len: %zu, sinfo_flags: 0x%x\n", | |
1453 | msg_len, sinfo_flags); | |
1454 | ||
eaa5c54d ISJ |
1455 | /* SCTP_EOF or SCTP_ABORT cannot be set on a TCP-style socket. */ |
1456 | if (sctp_style(sk, TCP) && (sinfo_flags & (SCTP_EOF | SCTP_ABORT))) { | |
1da177e4 LT |
1457 | err = -EINVAL; |
1458 | goto out_nounlock; | |
1459 | } | |
1460 | ||
eaa5c54d ISJ |
1461 | /* If SCTP_EOF is set, no data can be sent. Disallow sending zero |
1462 | * length messages when SCTP_EOF|SCTP_ABORT is not set. | |
1463 | * If SCTP_ABORT is set, the message length could be non zero with | |
1da177e4 | 1464 | * the msg_iov set to the user abort reason. |
d808ad9a | 1465 | */ |
eaa5c54d ISJ |
1466 | if (((sinfo_flags & SCTP_EOF) && (msg_len > 0)) || |
1467 | (!(sinfo_flags & (SCTP_EOF|SCTP_ABORT)) && (msg_len == 0))) { | |
1da177e4 LT |
1468 | err = -EINVAL; |
1469 | goto out_nounlock; | |
1470 | } | |
1471 | ||
eaa5c54d | 1472 | /* If SCTP_ADDR_OVER is set, there must be an address |
1da177e4 LT |
1473 | * specified in msg_name. |
1474 | */ | |
eaa5c54d | 1475 | if ((sinfo_flags & SCTP_ADDR_OVER) && (!msg->msg_name)) { |
1da177e4 LT |
1476 | err = -EINVAL; |
1477 | goto out_nounlock; | |
1478 | } | |
1479 | ||
1480 | transport = NULL; | |
1481 | ||
1482 | SCTP_DEBUG_PRINTK("About to look up association.\n"); | |
1483 | ||
1484 | sctp_lock_sock(sk); | |
1485 | ||
1486 | /* If a msg_name has been specified, assume this is to be used. */ | |
1487 | if (msg_name) { | |
1488 | /* Look for a matching association on the endpoint. */ | |
dce116ae | 1489 | asoc = sctp_endpoint_lookup_assoc(ep, &to, &transport); |
1da177e4 LT |
1490 | if (!asoc) { |
1491 | /* If we could not find a matching association on the | |
1492 | * endpoint, make sure that it is not a TCP-style | |
1493 | * socket that already has an association or there is | |
1494 | * no peeled-off association on another socket. | |
1495 | */ | |
1496 | if ((sctp_style(sk, TCP) && | |
1497 | sctp_sstate(sk, ESTABLISHED)) || | |
dce116ae | 1498 | sctp_endpoint_is_peeled_off(ep, &to)) { |
1da177e4 LT |
1499 | err = -EADDRNOTAVAIL; |
1500 | goto out_unlock; | |
1501 | } | |
1502 | } | |
1503 | } else { | |
1504 | asoc = sctp_id2assoc(sk, associd); | |
1505 | if (!asoc) { | |
1506 | err = -EPIPE; | |
1507 | goto out_unlock; | |
1508 | } | |
1509 | } | |
1510 | ||
1511 | if (asoc) { | |
1512 | SCTP_DEBUG_PRINTK("Just looked up association: %p.\n", asoc); | |
1513 | ||
1514 | /* We cannot send a message on a TCP-style SCTP_SS_ESTABLISHED | |
1515 | * socket that has an association in CLOSED state. This can | |
1516 | * happen when an accepted socket has an association that is | |
1517 | * already CLOSED. | |
1518 | */ | |
1519 | if (sctp_state(asoc, CLOSED) && sctp_style(sk, TCP)) { | |
1520 | err = -EPIPE; | |
1521 | goto out_unlock; | |
1522 | } | |
1523 | ||
eaa5c54d | 1524 | if (sinfo_flags & SCTP_EOF) { |
1da177e4 LT |
1525 | SCTP_DEBUG_PRINTK("Shutting down association: %p\n", |
1526 | asoc); | |
1527 | sctp_primitive_SHUTDOWN(asoc, NULL); | |
1528 | err = 0; | |
1529 | goto out_unlock; | |
1530 | } | |
eaa5c54d | 1531 | if (sinfo_flags & SCTP_ABORT) { |
c164a9ba SS |
1532 | |
1533 | chunk = sctp_make_abort_user(asoc, msg, msg_len); | |
1534 | if (!chunk) { | |
1535 | err = -ENOMEM; | |
1536 | goto out_unlock; | |
1537 | } | |
1538 | ||
1da177e4 | 1539 | SCTP_DEBUG_PRINTK("Aborting association: %p\n", asoc); |
c164a9ba | 1540 | sctp_primitive_ABORT(asoc, chunk); |
1da177e4 LT |
1541 | err = 0; |
1542 | goto out_unlock; | |
1543 | } | |
1544 | } | |
1545 | ||
1546 | /* Do we need to create the association? */ | |
1547 | if (!asoc) { | |
1548 | SCTP_DEBUG_PRINTK("There is no association yet.\n"); | |
1549 | ||
eaa5c54d | 1550 | if (sinfo_flags & (SCTP_EOF | SCTP_ABORT)) { |
1da177e4 LT |
1551 | err = -EINVAL; |
1552 | goto out_unlock; | |
1553 | } | |
1554 | ||
1555 | /* Check for invalid stream against the stream counts, | |
1556 | * either the default or the user specified stream counts. | |
1557 | */ | |
1558 | if (sinfo) { | |
1559 | if (!sinit || (sinit && !sinit->sinit_num_ostreams)) { | |
1560 | /* Check against the defaults. */ | |
1561 | if (sinfo->sinfo_stream >= | |
1562 | sp->initmsg.sinit_num_ostreams) { | |
1563 | err = -EINVAL; | |
1564 | goto out_unlock; | |
1565 | } | |
1566 | } else { | |
1567 | /* Check against the requested. */ | |
1568 | if (sinfo->sinfo_stream >= | |
1569 | sinit->sinit_num_ostreams) { | |
1570 | err = -EINVAL; | |
1571 | goto out_unlock; | |
1572 | } | |
1573 | } | |
1574 | } | |
1575 | ||
1576 | /* | |
1577 | * API 3.1.2 bind() - UDP Style Syntax | |
1578 | * If a bind() or sctp_bindx() is not called prior to a | |
1579 | * sendmsg() call that initiates a new association, the | |
1580 | * system picks an ephemeral port and will choose an address | |
1581 | * set equivalent to binding with a wildcard address. | |
1582 | */ | |
1583 | if (!ep->base.bind_addr.port) { | |
1584 | if (sctp_autobind(sk)) { | |
1585 | err = -EAGAIN; | |
1586 | goto out_unlock; | |
1587 | } | |
64a0c1c8 ISJ |
1588 | } else { |
1589 | /* | |
1590 | * If an unprivileged user inherits a one-to-many | |
1591 | * style socket with open associations on a privileged | |
1592 | * port, it MAY be permitted to accept new associations, | |
1593 | * but it SHOULD NOT be permitted to open new | |
1594 | * associations. | |
1595 | */ | |
1596 | if (ep->base.bind_addr.port < PROT_SOCK && | |
1597 | !capable(CAP_NET_BIND_SERVICE)) { | |
1598 | err = -EACCES; | |
1599 | goto out_unlock; | |
1600 | } | |
1da177e4 LT |
1601 | } |
1602 | ||
1603 | scope = sctp_scope(&to); | |
1604 | new_asoc = sctp_association_new(ep, sk, scope, GFP_KERNEL); | |
1605 | if (!new_asoc) { | |
1606 | err = -ENOMEM; | |
1607 | goto out_unlock; | |
1608 | } | |
1609 | asoc = new_asoc; | |
1610 | ||
1611 | /* If the SCTP_INIT ancillary data is specified, set all | |
1612 | * the association init values accordingly. | |
1613 | */ | |
1614 | if (sinit) { | |
1615 | if (sinit->sinit_num_ostreams) { | |
1616 | asoc->c.sinit_num_ostreams = | |
1617 | sinit->sinit_num_ostreams; | |
1618 | } | |
1619 | if (sinit->sinit_max_instreams) { | |
1620 | asoc->c.sinit_max_instreams = | |
1621 | sinit->sinit_max_instreams; | |
1622 | } | |
1623 | if (sinit->sinit_max_attempts) { | |
1624 | asoc->max_init_attempts | |
1625 | = sinit->sinit_max_attempts; | |
1626 | } | |
1627 | if (sinit->sinit_max_init_timeo) { | |
d808ad9a | 1628 | asoc->max_init_timeo = |
1da177e4 LT |
1629 | msecs_to_jiffies(sinit->sinit_max_init_timeo); |
1630 | } | |
1631 | } | |
1632 | ||
1633 | /* Prime the peer's transport structures. */ | |
dce116ae | 1634 | transport = sctp_assoc_add_peer(asoc, &to, GFP_KERNEL, SCTP_UNKNOWN); |
1da177e4 LT |
1635 | if (!transport) { |
1636 | err = -ENOMEM; | |
1637 | goto out_free; | |
1638 | } | |
1639 | err = sctp_assoc_set_bind_addr_from_ep(asoc, GFP_KERNEL); | |
1640 | if (err < 0) { | |
1641 | err = -ENOMEM; | |
1642 | goto out_free; | |
1643 | } | |
1644 | } | |
1645 | ||
1646 | /* ASSERT: we have a valid association at this point. */ | |
1647 | SCTP_DEBUG_PRINTK("We have a valid association.\n"); | |
1648 | ||
1649 | if (!sinfo) { | |
1650 | /* If the user didn't specify SNDRCVINFO, make up one with | |
1651 | * some defaults. | |
1652 | */ | |
1653 | default_sinfo.sinfo_stream = asoc->default_stream; | |
1654 | default_sinfo.sinfo_flags = asoc->default_flags; | |
1655 | default_sinfo.sinfo_ppid = asoc->default_ppid; | |
1656 | default_sinfo.sinfo_context = asoc->default_context; | |
1657 | default_sinfo.sinfo_timetolive = asoc->default_timetolive; | |
1658 | default_sinfo.sinfo_assoc_id = sctp_assoc2id(asoc); | |
1659 | sinfo = &default_sinfo; | |
1660 | } | |
1661 | ||
1662 | /* API 7.1.7, the sndbuf size per association bounds the | |
1663 | * maximum size of data that can be sent in a single send call. | |
1664 | */ | |
1665 | if (msg_len > sk->sk_sndbuf) { | |
1666 | err = -EMSGSIZE; | |
1667 | goto out_free; | |
1668 | } | |
1669 | ||
8a479491 VY |
1670 | if (asoc->pmtu_pending) |
1671 | sctp_assoc_pending_pmtu(asoc); | |
1672 | ||
1da177e4 LT |
1673 | /* If fragmentation is disabled and the message length exceeds the |
1674 | * association fragmentation point, return EMSGSIZE. The I-D | |
1675 | * does not specify what this error is, but this looks like | |
1676 | * a great fit. | |
1677 | */ | |
1678 | if (sctp_sk(sk)->disable_fragments && (msg_len > asoc->frag_point)) { | |
1679 | err = -EMSGSIZE; | |
1680 | goto out_free; | |
1681 | } | |
1682 | ||
1683 | if (sinfo) { | |
1684 | /* Check for invalid stream. */ | |
1685 | if (sinfo->sinfo_stream >= asoc->c.sinit_num_ostreams) { | |
1686 | err = -EINVAL; | |
1687 | goto out_free; | |
1688 | } | |
1689 | } | |
1690 | ||
1691 | timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT); | |
1692 | if (!sctp_wspace(asoc)) { | |
1693 | err = sctp_wait_for_sndbuf(asoc, &timeo, msg_len); | |
1694 | if (err) | |
1695 | goto out_free; | |
1696 | } | |
1697 | ||
1698 | /* If an address is passed with the sendto/sendmsg call, it is used | |
1699 | * to override the primary destination address in the TCP model, or | |
eaa5c54d | 1700 | * when SCTP_ADDR_OVER flag is set in the UDP model. |
1da177e4 LT |
1701 | */ |
1702 | if ((sctp_style(sk, TCP) && msg_name) || | |
eaa5c54d | 1703 | (sinfo_flags & SCTP_ADDR_OVER)) { |
dce116ae | 1704 | chunk_tp = sctp_assoc_lookup_paddr(asoc, &to); |
1da177e4 LT |
1705 | if (!chunk_tp) { |
1706 | err = -EINVAL; | |
1707 | goto out_free; | |
1708 | } | |
1709 | } else | |
1710 | chunk_tp = NULL; | |
1711 | ||
1712 | /* Auto-connect, if we aren't connected already. */ | |
1713 | if (sctp_state(asoc, CLOSED)) { | |
1714 | err = sctp_primitive_ASSOCIATE(asoc, NULL); | |
1715 | if (err < 0) | |
1716 | goto out_free; | |
1717 | SCTP_DEBUG_PRINTK("We associated primitively.\n"); | |
1718 | } | |
1719 | ||
1720 | /* Break the message into multiple chunks of maximum size. */ | |
1721 | datamsg = sctp_datamsg_from_user(asoc, sinfo, msg, msg_len); | |
1722 | if (!datamsg) { | |
1723 | err = -ENOMEM; | |
1724 | goto out_free; | |
1725 | } | |
1726 | ||
1727 | /* Now send the (possibly) fragmented message. */ | |
1728 | list_for_each(pos, &datamsg->chunks) { | |
1729 | chunk = list_entry(pos, struct sctp_chunk, frag_list); | |
1730 | sctp_datamsg_track(chunk); | |
1731 | ||
1732 | /* Do accounting for the write space. */ | |
1733 | sctp_set_owner_w(chunk); | |
1734 | ||
1735 | chunk->transport = chunk_tp; | |
1736 | ||
1737 | /* Send it to the lower layers. Note: all chunks | |
1738 | * must either fail or succeed. The lower layer | |
1739 | * works that way today. Keep it that way or this | |
1740 | * breaks. | |
1741 | */ | |
1742 | err = sctp_primitive_SEND(asoc, chunk); | |
1743 | /* Did the lower layer accept the chunk? */ | |
1744 | if (err) | |
1745 | sctp_chunk_free(chunk); | |
1746 | SCTP_DEBUG_PRINTK("We sent primitively.\n"); | |
1747 | } | |
1748 | ||
1749 | sctp_datamsg_free(datamsg); | |
1750 | if (err) | |
1751 | goto out_free; | |
1752 | else | |
1753 | err = msg_len; | |
1754 | ||
1755 | /* If we are already past ASSOCIATE, the lower | |
1756 | * layers are responsible for association cleanup. | |
1757 | */ | |
1758 | goto out_unlock; | |
1759 | ||
1760 | out_free: | |
1761 | if (new_asoc) | |
1762 | sctp_association_free(asoc); | |
1763 | out_unlock: | |
1764 | sctp_release_sock(sk); | |
1765 | ||
1766 | out_nounlock: | |
1767 | return sctp_error(sk, msg_flags, err); | |
1768 | ||
1769 | #if 0 | |
1770 | do_sock_err: | |
1771 | if (msg_len) | |
1772 | err = msg_len; | |
1773 | else | |
1774 | err = sock_error(sk); | |
1775 | goto out; | |
1776 | ||
1777 | do_interrupted: | |
1778 | if (msg_len) | |
1779 | err = msg_len; | |
1780 | goto out; | |
1781 | #endif /* 0 */ | |
1782 | } | |
1783 | ||
1784 | /* This is an extended version of skb_pull() that removes the data from the | |
1785 | * start of a skb even when data is spread across the list of skb's in the | |
1786 | * frag_list. len specifies the total amount of data that needs to be removed. | |
1787 | * when 'len' bytes could be removed from the skb, it returns 0. | |
1788 | * If 'len' exceeds the total skb length, it returns the no. of bytes that | |
1789 | * could not be removed. | |
1790 | */ | |
1791 | static int sctp_skb_pull(struct sk_buff *skb, int len) | |
1792 | { | |
1793 | struct sk_buff *list; | |
1794 | int skb_len = skb_headlen(skb); | |
1795 | int rlen; | |
1796 | ||
1797 | if (len <= skb_len) { | |
1798 | __skb_pull(skb, len); | |
1799 | return 0; | |
1800 | } | |
1801 | len -= skb_len; | |
1802 | __skb_pull(skb, skb_len); | |
1803 | ||
1804 | for (list = skb_shinfo(skb)->frag_list; list; list = list->next) { | |
1805 | rlen = sctp_skb_pull(list, len); | |
1806 | skb->len -= (len-rlen); | |
1807 | skb->data_len -= (len-rlen); | |
1808 | ||
1809 | if (!rlen) | |
1810 | return 0; | |
1811 | ||
1812 | len = rlen; | |
1813 | } | |
1814 | ||
1815 | return len; | |
1816 | } | |
1817 | ||
1818 | /* API 3.1.3 recvmsg() - UDP Style Syntax | |
1819 | * | |
1820 | * ssize_t recvmsg(int socket, struct msghdr *message, | |
1821 | * int flags); | |
1822 | * | |
1823 | * socket - the socket descriptor of the endpoint. | |
1824 | * message - pointer to the msghdr structure which contains a single | |
1825 | * user message and possibly some ancillary data. | |
1826 | * | |
1827 | * See Section 5 for complete description of the data | |
1828 | * structures. | |
1829 | * | |
1830 | * flags - flags sent or received with the user message, see Section | |
1831 | * 5 for complete description of the flags. | |
1832 | */ | |
1833 | static struct sk_buff *sctp_skb_recv_datagram(struct sock *, int, int, int *); | |
1834 | ||
1835 | SCTP_STATIC int sctp_recvmsg(struct kiocb *iocb, struct sock *sk, | |
1836 | struct msghdr *msg, size_t len, int noblock, | |
1837 | int flags, int *addr_len) | |
1838 | { | |
1839 | struct sctp_ulpevent *event = NULL; | |
1840 | struct sctp_sock *sp = sctp_sk(sk); | |
1841 | struct sk_buff *skb; | |
1842 | int copied; | |
1843 | int err = 0; | |
1844 | int skb_len; | |
1845 | ||
1846 | SCTP_DEBUG_PRINTK("sctp_recvmsg(%s: %p, %s: %p, %s: %zd, %s: %d, %s: " | |
1847 | "0x%x, %s: %p)\n", "sk", sk, "msghdr", msg, | |
1848 | "len", len, "knoblauch", noblock, | |
1849 | "flags", flags, "addr_len", addr_len); | |
1850 | ||
1851 | sctp_lock_sock(sk); | |
1852 | ||
1853 | if (sctp_style(sk, TCP) && !sctp_sstate(sk, ESTABLISHED)) { | |
1854 | err = -ENOTCONN; | |
1855 | goto out; | |
1856 | } | |
1857 | ||
1858 | skb = sctp_skb_recv_datagram(sk, flags, noblock, &err); | |
1859 | if (!skb) | |
1860 | goto out; | |
1861 | ||
1862 | /* Get the total length of the skb including any skb's in the | |
1863 | * frag_list. | |
1864 | */ | |
1865 | skb_len = skb->len; | |
1866 | ||
1867 | copied = skb_len; | |
1868 | if (copied > len) | |
1869 | copied = len; | |
1870 | ||
1871 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
1872 | ||
1873 | event = sctp_skb2event(skb); | |
1874 | ||
1875 | if (err) | |
1876 | goto out_free; | |
1877 | ||
1878 | sock_recv_timestamp(msg, sk, skb); | |
1879 | if (sctp_ulpevent_is_notification(event)) { | |
1880 | msg->msg_flags |= MSG_NOTIFICATION; | |
1881 | sp->pf->event_msgname(event, msg->msg_name, addr_len); | |
1882 | } else { | |
1883 | sp->pf->skb_msgname(skb, msg->msg_name, addr_len); | |
1884 | } | |
1885 | ||
1886 | /* Check if we allow SCTP_SNDRCVINFO. */ | |
1887 | if (sp->subscribe.sctp_data_io_event) | |
1888 | sctp_ulpevent_read_sndrcvinfo(event, msg); | |
1889 | #if 0 | |
1890 | /* FIXME: we should be calling IP/IPv6 layers. */ | |
1891 | if (sk->sk_protinfo.af_inet.cmsg_flags) | |
1892 | ip_cmsg_recv(msg, skb); | |
1893 | #endif | |
1894 | ||
1895 | err = copied; | |
1896 | ||
1897 | /* If skb's length exceeds the user's buffer, update the skb and | |
1898 | * push it back to the receive_queue so that the next call to | |
1899 | * recvmsg() will return the remaining data. Don't set MSG_EOR. | |
1900 | */ | |
1901 | if (skb_len > copied) { | |
1902 | msg->msg_flags &= ~MSG_EOR; | |
1903 | if (flags & MSG_PEEK) | |
1904 | goto out_free; | |
1905 | sctp_skb_pull(skb, copied); | |
1906 | skb_queue_head(&sk->sk_receive_queue, skb); | |
1907 | ||
1908 | /* When only partial message is copied to the user, increase | |
1909 | * rwnd by that amount. If all the data in the skb is read, | |
1910 | * rwnd is updated when the event is freed. | |
1911 | */ | |
1912 | sctp_assoc_rwnd_increase(event->asoc, copied); | |
1913 | goto out; | |
1914 | } else if ((event->msg_flags & MSG_NOTIFICATION) || | |
1915 | (event->msg_flags & MSG_EOR)) | |
1916 | msg->msg_flags |= MSG_EOR; | |
1917 | else | |
1918 | msg->msg_flags &= ~MSG_EOR; | |
1919 | ||
1920 | out_free: | |
1921 | if (flags & MSG_PEEK) { | |
1922 | /* Release the skb reference acquired after peeking the skb in | |
1923 | * sctp_skb_recv_datagram(). | |
1924 | */ | |
1925 | kfree_skb(skb); | |
1926 | } else { | |
1927 | /* Free the event which includes releasing the reference to | |
1928 | * the owner of the skb, freeing the skb and updating the | |
1929 | * rwnd. | |
1930 | */ | |
1931 | sctp_ulpevent_free(event); | |
1932 | } | |
1933 | out: | |
1934 | sctp_release_sock(sk); | |
1935 | return err; | |
1936 | } | |
1937 | ||
1938 | /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS) | |
1939 | * | |
1940 | * This option is a on/off flag. If enabled no SCTP message | |
1941 | * fragmentation will be performed. Instead if a message being sent | |
1942 | * exceeds the current PMTU size, the message will NOT be sent and | |
1943 | * instead a error will be indicated to the user. | |
1944 | */ | |
1945 | static int sctp_setsockopt_disable_fragments(struct sock *sk, | |
1946 | char __user *optval, int optlen) | |
1947 | { | |
1948 | int val; | |
1949 | ||
1950 | if (optlen < sizeof(int)) | |
1951 | return -EINVAL; | |
1952 | ||
1953 | if (get_user(val, (int __user *)optval)) | |
1954 | return -EFAULT; | |
1955 | ||
1956 | sctp_sk(sk)->disable_fragments = (val == 0) ? 0 : 1; | |
1957 | ||
1958 | return 0; | |
1959 | } | |
1960 | ||
1961 | static int sctp_setsockopt_events(struct sock *sk, char __user *optval, | |
1962 | int optlen) | |
1963 | { | |
1964 | if (optlen != sizeof(struct sctp_event_subscribe)) | |
1965 | return -EINVAL; | |
1966 | if (copy_from_user(&sctp_sk(sk)->subscribe, optval, optlen)) | |
1967 | return -EFAULT; | |
1968 | return 0; | |
1969 | } | |
1970 | ||
1971 | /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE) | |
1972 | * | |
1973 | * This socket option is applicable to the UDP-style socket only. When | |
1974 | * set it will cause associations that are idle for more than the | |
1975 | * specified number of seconds to automatically close. An association | |
1976 | * being idle is defined an association that has NOT sent or received | |
1977 | * user data. The special value of '0' indicates that no automatic | |
1978 | * close of any associations should be performed. The option expects an | |
1979 | * integer defining the number of seconds of idle time before an | |
1980 | * association is closed. | |
1981 | */ | |
1982 | static int sctp_setsockopt_autoclose(struct sock *sk, char __user *optval, | |
1983 | int optlen) | |
1984 | { | |
1985 | struct sctp_sock *sp = sctp_sk(sk); | |
1986 | ||
1987 | /* Applicable to UDP-style socket only */ | |
1988 | if (sctp_style(sk, TCP)) | |
1989 | return -EOPNOTSUPP; | |
1990 | if (optlen != sizeof(int)) | |
1991 | return -EINVAL; | |
1992 | if (copy_from_user(&sp->autoclose, optval, optlen)) | |
1993 | return -EFAULT; | |
1994 | ||
1da177e4 LT |
1995 | return 0; |
1996 | } | |
1997 | ||
1998 | /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS) | |
1999 | * | |
2000 | * Applications can enable or disable heartbeats for any peer address of | |
2001 | * an association, modify an address's heartbeat interval, force a | |
2002 | * heartbeat to be sent immediately, and adjust the address's maximum | |
2003 | * number of retransmissions sent before an address is considered | |
2004 | * unreachable. The following structure is used to access and modify an | |
2005 | * address's parameters: | |
2006 | * | |
2007 | * struct sctp_paddrparams { | |
52ccb8e9 FF |
2008 | * sctp_assoc_t spp_assoc_id; |
2009 | * struct sockaddr_storage spp_address; | |
2010 | * uint32_t spp_hbinterval; | |
2011 | * uint16_t spp_pathmaxrxt; | |
2012 | * uint32_t spp_pathmtu; | |
2013 | * uint32_t spp_sackdelay; | |
2014 | * uint32_t spp_flags; | |
2015 | * }; | |
2016 | * | |
2017 | * spp_assoc_id - (one-to-many style socket) This is filled in the | |
2018 | * application, and identifies the association for | |
2019 | * this query. | |
1da177e4 LT |
2020 | * spp_address - This specifies which address is of interest. |
2021 | * spp_hbinterval - This contains the value of the heartbeat interval, | |
52ccb8e9 FF |
2022 | * in milliseconds. If a value of zero |
2023 | * is present in this field then no changes are to | |
2024 | * be made to this parameter. | |
1da177e4 LT |
2025 | * spp_pathmaxrxt - This contains the maximum number of |
2026 | * retransmissions before this address shall be | |
52ccb8e9 FF |
2027 | * considered unreachable. If a value of zero |
2028 | * is present in this field then no changes are to | |
2029 | * be made to this parameter. | |
2030 | * spp_pathmtu - When Path MTU discovery is disabled the value | |
2031 | * specified here will be the "fixed" path mtu. | |
2032 | * Note that if the spp_address field is empty | |
2033 | * then all associations on this address will | |
2034 | * have this fixed path mtu set upon them. | |
2035 | * | |
2036 | * spp_sackdelay - When delayed sack is enabled, this value specifies | |
2037 | * the number of milliseconds that sacks will be delayed | |
2038 | * for. This value will apply to all addresses of an | |
2039 | * association if the spp_address field is empty. Note | |
2040 | * also, that if delayed sack is enabled and this | |
2041 | * value is set to 0, no change is made to the last | |
2042 | * recorded delayed sack timer value. | |
2043 | * | |
2044 | * spp_flags - These flags are used to control various features | |
2045 | * on an association. The flag field may contain | |
2046 | * zero or more of the following options. | |
2047 | * | |
2048 | * SPP_HB_ENABLE - Enable heartbeats on the | |
2049 | * specified address. Note that if the address | |
2050 | * field is empty all addresses for the association | |
2051 | * have heartbeats enabled upon them. | |
2052 | * | |
2053 | * SPP_HB_DISABLE - Disable heartbeats on the | |
2054 | * speicifed address. Note that if the address | |
2055 | * field is empty all addresses for the association | |
2056 | * will have their heartbeats disabled. Note also | |
2057 | * that SPP_HB_ENABLE and SPP_HB_DISABLE are | |
2058 | * mutually exclusive, only one of these two should | |
2059 | * be specified. Enabling both fields will have | |
2060 | * undetermined results. | |
2061 | * | |
2062 | * SPP_HB_DEMAND - Request a user initiated heartbeat | |
2063 | * to be made immediately. | |
2064 | * | |
bdf3092a VY |
2065 | * SPP_HB_TIME_IS_ZERO - Specify's that the time for |
2066 | * heartbeat delayis to be set to the value of 0 | |
2067 | * milliseconds. | |
2068 | * | |
52ccb8e9 FF |
2069 | * SPP_PMTUD_ENABLE - This field will enable PMTU |
2070 | * discovery upon the specified address. Note that | |
2071 | * if the address feild is empty then all addresses | |
2072 | * on the association are effected. | |
2073 | * | |
2074 | * SPP_PMTUD_DISABLE - This field will disable PMTU | |
2075 | * discovery upon the specified address. Note that | |
2076 | * if the address feild is empty then all addresses | |
2077 | * on the association are effected. Not also that | |
2078 | * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually | |
2079 | * exclusive. Enabling both will have undetermined | |
2080 | * results. | |
2081 | * | |
2082 | * SPP_SACKDELAY_ENABLE - Setting this flag turns | |
2083 | * on delayed sack. The time specified in spp_sackdelay | |
2084 | * is used to specify the sack delay for this address. Note | |
2085 | * that if spp_address is empty then all addresses will | |
2086 | * enable delayed sack and take on the sack delay | |
2087 | * value specified in spp_sackdelay. | |
2088 | * SPP_SACKDELAY_DISABLE - Setting this flag turns | |
2089 | * off delayed sack. If the spp_address field is blank then | |
2090 | * delayed sack is disabled for the entire association. Note | |
2091 | * also that this field is mutually exclusive to | |
2092 | * SPP_SACKDELAY_ENABLE, setting both will have undefined | |
2093 | * results. | |
1da177e4 | 2094 | */ |
16164366 AB |
2095 | static int sctp_apply_peer_addr_params(struct sctp_paddrparams *params, |
2096 | struct sctp_transport *trans, | |
2097 | struct sctp_association *asoc, | |
2098 | struct sctp_sock *sp, | |
2099 | int hb_change, | |
2100 | int pmtud_change, | |
2101 | int sackdelay_change) | |
52ccb8e9 FF |
2102 | { |
2103 | int error; | |
2104 | ||
2105 | if (params->spp_flags & SPP_HB_DEMAND && trans) { | |
2106 | error = sctp_primitive_REQUESTHEARTBEAT (trans->asoc, trans); | |
2107 | if (error) | |
2108 | return error; | |
2109 | } | |
2110 | ||
bdf3092a VY |
2111 | /* Note that unless the spp_flag is set to SPP_HB_ENABLE the value of |
2112 | * this field is ignored. Note also that a value of zero indicates | |
2113 | * the current setting should be left unchanged. | |
2114 | */ | |
2115 | if (params->spp_flags & SPP_HB_ENABLE) { | |
2116 | ||
2117 | /* Re-zero the interval if the SPP_HB_TIME_IS_ZERO is | |
2118 | * set. This lets us use 0 value when this flag | |
2119 | * is set. | |
2120 | */ | |
2121 | if (params->spp_flags & SPP_HB_TIME_IS_ZERO) | |
2122 | params->spp_hbinterval = 0; | |
2123 | ||
2124 | if (params->spp_hbinterval || | |
2125 | (params->spp_flags & SPP_HB_TIME_IS_ZERO)) { | |
2126 | if (trans) { | |
2127 | trans->hbinterval = | |
2128 | msecs_to_jiffies(params->spp_hbinterval); | |
2129 | } else if (asoc) { | |
2130 | asoc->hbinterval = | |
2131 | msecs_to_jiffies(params->spp_hbinterval); | |
2132 | } else { | |
2133 | sp->hbinterval = params->spp_hbinterval; | |
2134 | } | |
52ccb8e9 FF |
2135 | } |
2136 | } | |
2137 | ||
2138 | if (hb_change) { | |
2139 | if (trans) { | |
2140 | trans->param_flags = | |
2141 | (trans->param_flags & ~SPP_HB) | hb_change; | |
2142 | } else if (asoc) { | |
2143 | asoc->param_flags = | |
2144 | (asoc->param_flags & ~SPP_HB) | hb_change; | |
2145 | } else { | |
2146 | sp->param_flags = | |
2147 | (sp->param_flags & ~SPP_HB) | hb_change; | |
2148 | } | |
2149 | } | |
2150 | ||
bdf3092a VY |
2151 | /* When Path MTU discovery is disabled the value specified here will |
2152 | * be the "fixed" path mtu (i.e. the value of the spp_flags field must | |
2153 | * include the flag SPP_PMTUD_DISABLE for this field to have any | |
2154 | * effect). | |
2155 | */ | |
2156 | if ((params->spp_flags & SPP_PMTUD_DISABLE) && params->spp_pathmtu) { | |
52ccb8e9 FF |
2157 | if (trans) { |
2158 | trans->pathmtu = params->spp_pathmtu; | |
2159 | sctp_assoc_sync_pmtu(asoc); | |
2160 | } else if (asoc) { | |
2161 | asoc->pathmtu = params->spp_pathmtu; | |
2162 | sctp_frag_point(sp, params->spp_pathmtu); | |
2163 | } else { | |
2164 | sp->pathmtu = params->spp_pathmtu; | |
2165 | } | |
2166 | } | |
2167 | ||
2168 | if (pmtud_change) { | |
2169 | if (trans) { | |
2170 | int update = (trans->param_flags & SPP_PMTUD_DISABLE) && | |
2171 | (params->spp_flags & SPP_PMTUD_ENABLE); | |
2172 | trans->param_flags = | |
2173 | (trans->param_flags & ~SPP_PMTUD) | pmtud_change; | |
2174 | if (update) { | |
2175 | sctp_transport_pmtu(trans); | |
2176 | sctp_assoc_sync_pmtu(asoc); | |
2177 | } | |
2178 | } else if (asoc) { | |
2179 | asoc->param_flags = | |
2180 | (asoc->param_flags & ~SPP_PMTUD) | pmtud_change; | |
2181 | } else { | |
2182 | sp->param_flags = | |
2183 | (sp->param_flags & ~SPP_PMTUD) | pmtud_change; | |
2184 | } | |
2185 | } | |
2186 | ||
bdf3092a VY |
2187 | /* Note that unless the spp_flag is set to SPP_SACKDELAY_ENABLE the |
2188 | * value of this field is ignored. Note also that a value of zero | |
2189 | * indicates the current setting should be left unchanged. | |
2190 | */ | |
2191 | if ((params->spp_flags & SPP_SACKDELAY_ENABLE) && params->spp_sackdelay) { | |
52ccb8e9 FF |
2192 | if (trans) { |
2193 | trans->sackdelay = | |
2194 | msecs_to_jiffies(params->spp_sackdelay); | |
2195 | } else if (asoc) { | |
2196 | asoc->sackdelay = | |
2197 | msecs_to_jiffies(params->spp_sackdelay); | |
2198 | } else { | |
2199 | sp->sackdelay = params->spp_sackdelay; | |
2200 | } | |
2201 | } | |
2202 | ||
2203 | if (sackdelay_change) { | |
2204 | if (trans) { | |
2205 | trans->param_flags = | |
2206 | (trans->param_flags & ~SPP_SACKDELAY) | | |
2207 | sackdelay_change; | |
2208 | } else if (asoc) { | |
2209 | asoc->param_flags = | |
2210 | (asoc->param_flags & ~SPP_SACKDELAY) | | |
2211 | sackdelay_change; | |
2212 | } else { | |
2213 | sp->param_flags = | |
2214 | (sp->param_flags & ~SPP_SACKDELAY) | | |
2215 | sackdelay_change; | |
2216 | } | |
2217 | } | |
2218 | ||
bdf3092a VY |
2219 | /* Note that unless the spp_flag is set to SPP_PMTUD_ENABLE the value |
2220 | * of this field is ignored. Note also that a value of zero | |
2221 | * indicates the current setting should be left unchanged. | |
2222 | */ | |
2223 | if ((params->spp_flags & SPP_PMTUD_ENABLE) && params->spp_pathmaxrxt) { | |
52ccb8e9 FF |
2224 | if (trans) { |
2225 | trans->pathmaxrxt = params->spp_pathmaxrxt; | |
2226 | } else if (asoc) { | |
2227 | asoc->pathmaxrxt = params->spp_pathmaxrxt; | |
2228 | } else { | |
2229 | sp->pathmaxrxt = params->spp_pathmaxrxt; | |
2230 | } | |
2231 | } | |
2232 | ||
2233 | return 0; | |
2234 | } | |
2235 | ||
1da177e4 LT |
2236 | static int sctp_setsockopt_peer_addr_params(struct sock *sk, |
2237 | char __user *optval, int optlen) | |
2238 | { | |
52ccb8e9 FF |
2239 | struct sctp_paddrparams params; |
2240 | struct sctp_transport *trans = NULL; | |
2241 | struct sctp_association *asoc = NULL; | |
2242 | struct sctp_sock *sp = sctp_sk(sk); | |
1da177e4 | 2243 | int error; |
52ccb8e9 | 2244 | int hb_change, pmtud_change, sackdelay_change; |
1da177e4 LT |
2245 | |
2246 | if (optlen != sizeof(struct sctp_paddrparams)) | |
52ccb8e9 FF |
2247 | return - EINVAL; |
2248 | ||
1da177e4 LT |
2249 | if (copy_from_user(¶ms, optval, optlen)) |
2250 | return -EFAULT; | |
2251 | ||
52ccb8e9 FF |
2252 | /* Validate flags and value parameters. */ |
2253 | hb_change = params.spp_flags & SPP_HB; | |
2254 | pmtud_change = params.spp_flags & SPP_PMTUD; | |
2255 | sackdelay_change = params.spp_flags & SPP_SACKDELAY; | |
2256 | ||
2257 | if (hb_change == SPP_HB || | |
2258 | pmtud_change == SPP_PMTUD || | |
2259 | sackdelay_change == SPP_SACKDELAY || | |
2260 | params.spp_sackdelay > 500 || | |
2261 | (params.spp_pathmtu | |
2262 | && params.spp_pathmtu < SCTP_DEFAULT_MINSEGMENT)) | |
2263 | return -EINVAL; | |
1da177e4 | 2264 | |
52ccb8e9 FF |
2265 | /* If an address other than INADDR_ANY is specified, and |
2266 | * no transport is found, then the request is invalid. | |
2267 | */ | |
2268 | if (!sctp_is_any(( union sctp_addr *)¶ms.spp_address)) { | |
2269 | trans = sctp_addr_id2transport(sk, ¶ms.spp_address, | |
2270 | params.spp_assoc_id); | |
2271 | if (!trans) | |
1da177e4 | 2272 | return -EINVAL; |
1da177e4 LT |
2273 | } |
2274 | ||
52ccb8e9 FF |
2275 | /* Get association, if assoc_id != 0 and the socket is a one |
2276 | * to many style socket, and an association was not found, then | |
2277 | * the id was invalid. | |
2278 | */ | |
2279 | asoc = sctp_id2assoc(sk, params.spp_assoc_id); | |
2280 | if (!asoc && params.spp_assoc_id && sctp_style(sk, UDP)) | |
1da177e4 LT |
2281 | return -EINVAL; |
2282 | ||
52ccb8e9 FF |
2283 | /* Heartbeat demand can only be sent on a transport or |
2284 | * association, but not a socket. | |
1da177e4 | 2285 | */ |
52ccb8e9 FF |
2286 | if (params.spp_flags & SPP_HB_DEMAND && !trans && !asoc) |
2287 | return -EINVAL; | |
2288 | ||
2289 | /* Process parameters. */ | |
2290 | error = sctp_apply_peer_addr_params(¶ms, trans, asoc, sp, | |
2291 | hb_change, pmtud_change, | |
2292 | sackdelay_change); | |
1da177e4 | 2293 | |
52ccb8e9 FF |
2294 | if (error) |
2295 | return error; | |
2296 | ||
2297 | /* If changes are for association, also apply parameters to each | |
2298 | * transport. | |
1da177e4 | 2299 | */ |
52ccb8e9 FF |
2300 | if (!trans && asoc) { |
2301 | struct list_head *pos; | |
2302 | ||
2303 | list_for_each(pos, &asoc->peer.transport_addr_list) { | |
2304 | trans = list_entry(pos, struct sctp_transport, | |
2305 | transports); | |
2306 | sctp_apply_peer_addr_params(¶ms, trans, asoc, sp, | |
2307 | hb_change, pmtud_change, | |
2308 | sackdelay_change); | |
2309 | } | |
2310 | } | |
1da177e4 LT |
2311 | |
2312 | return 0; | |
2313 | } | |
2314 | ||
b6e1331f | 2315 | /* 7.1.23. Delayed Ack Timer (SCTP_DELAYED_ACK_TIME) |
7708610b FF |
2316 | * |
2317 | * This options will get or set the delayed ack timer. The time is set | |
2318 | * in milliseconds. If the assoc_id is 0, then this sets or gets the | |
2319 | * endpoints default delayed ack timer value. If the assoc_id field is | |
2320 | * non-zero, then the set or get effects the specified association. | |
2321 | * | |
2322 | * struct sctp_assoc_value { | |
2323 | * sctp_assoc_t assoc_id; | |
2324 | * uint32_t assoc_value; | |
2325 | * }; | |
2326 | * | |
2327 | * assoc_id - This parameter, indicates which association the | |
2328 | * user is preforming an action upon. Note that if | |
2329 | * this field's value is zero then the endpoints | |
2330 | * default value is changed (effecting future | |
2331 | * associations only). | |
2332 | * | |
2333 | * assoc_value - This parameter contains the number of milliseconds | |
2334 | * that the user is requesting the delayed ACK timer | |
2335 | * be set to. Note that this value is defined in | |
2336 | * the standard to be between 200 and 500 milliseconds. | |
2337 | * | |
2338 | * Note: a value of zero will leave the value alone, | |
2339 | * but disable SACK delay. A non-zero value will also | |
2340 | * enable SACK delay. | |
2341 | */ | |
2342 | ||
2343 | static int sctp_setsockopt_delayed_ack_time(struct sock *sk, | |
2344 | char __user *optval, int optlen) | |
2345 | { | |
2346 | struct sctp_assoc_value params; | |
2347 | struct sctp_transport *trans = NULL; | |
2348 | struct sctp_association *asoc = NULL; | |
2349 | struct sctp_sock *sp = sctp_sk(sk); | |
2350 | ||
2351 | if (optlen != sizeof(struct sctp_assoc_value)) | |
2352 | return - EINVAL; | |
2353 | ||
2354 | if (copy_from_user(¶ms, optval, optlen)) | |
2355 | return -EFAULT; | |
2356 | ||
2357 | /* Validate value parameter. */ | |
2358 | if (params.assoc_value > 500) | |
2359 | return -EINVAL; | |
2360 | ||
2361 | /* Get association, if assoc_id != 0 and the socket is a one | |
2362 | * to many style socket, and an association was not found, then | |
2363 | * the id was invalid. | |
d808ad9a | 2364 | */ |
7708610b FF |
2365 | asoc = sctp_id2assoc(sk, params.assoc_id); |
2366 | if (!asoc && params.assoc_id && sctp_style(sk, UDP)) | |
2367 | return -EINVAL; | |
2368 | ||
2369 | if (params.assoc_value) { | |
2370 | if (asoc) { | |
2371 | asoc->sackdelay = | |
2372 | msecs_to_jiffies(params.assoc_value); | |
d808ad9a | 2373 | asoc->param_flags = |
7708610b FF |
2374 | (asoc->param_flags & ~SPP_SACKDELAY) | |
2375 | SPP_SACKDELAY_ENABLE; | |
2376 | } else { | |
2377 | sp->sackdelay = params.assoc_value; | |
d808ad9a | 2378 | sp->param_flags = |
7708610b FF |
2379 | (sp->param_flags & ~SPP_SACKDELAY) | |
2380 | SPP_SACKDELAY_ENABLE; | |
2381 | } | |
2382 | } else { | |
2383 | if (asoc) { | |
d808ad9a | 2384 | asoc->param_flags = |
7708610b FF |
2385 | (asoc->param_flags & ~SPP_SACKDELAY) | |
2386 | SPP_SACKDELAY_DISABLE; | |
2387 | } else { | |
d808ad9a | 2388 | sp->param_flags = |
7708610b FF |
2389 | (sp->param_flags & ~SPP_SACKDELAY) | |
2390 | SPP_SACKDELAY_DISABLE; | |
2391 | } | |
2392 | } | |
2393 | ||
2394 | /* If change is for association, also apply to each transport. */ | |
2395 | if (asoc) { | |
2396 | struct list_head *pos; | |
2397 | ||
2398 | list_for_each(pos, &asoc->peer.transport_addr_list) { | |
2399 | trans = list_entry(pos, struct sctp_transport, | |
2400 | transports); | |
2401 | if (params.assoc_value) { | |
2402 | trans->sackdelay = | |
2403 | msecs_to_jiffies(params.assoc_value); | |
d808ad9a | 2404 | trans->param_flags = |
7708610b FF |
2405 | (trans->param_flags & ~SPP_SACKDELAY) | |
2406 | SPP_SACKDELAY_ENABLE; | |
2407 | } else { | |
d808ad9a | 2408 | trans->param_flags = |
7708610b FF |
2409 | (trans->param_flags & ~SPP_SACKDELAY) | |
2410 | SPP_SACKDELAY_DISABLE; | |
2411 | } | |
2412 | } | |
2413 | } | |
d808ad9a | 2414 | |
7708610b FF |
2415 | return 0; |
2416 | } | |
2417 | ||
1da177e4 LT |
2418 | /* 7.1.3 Initialization Parameters (SCTP_INITMSG) |
2419 | * | |
2420 | * Applications can specify protocol parameters for the default association | |
2421 | * initialization. The option name argument to setsockopt() and getsockopt() | |
2422 | * is SCTP_INITMSG. | |
2423 | * | |
2424 | * Setting initialization parameters is effective only on an unconnected | |
2425 | * socket (for UDP-style sockets only future associations are effected | |
2426 | * by the change). With TCP-style sockets, this option is inherited by | |
2427 | * sockets derived from a listener socket. | |
2428 | */ | |
2429 | static int sctp_setsockopt_initmsg(struct sock *sk, char __user *optval, int optlen) | |
2430 | { | |
2431 | struct sctp_initmsg sinit; | |
2432 | struct sctp_sock *sp = sctp_sk(sk); | |
2433 | ||
2434 | if (optlen != sizeof(struct sctp_initmsg)) | |
2435 | return -EINVAL; | |
2436 | if (copy_from_user(&sinit, optval, optlen)) | |
2437 | return -EFAULT; | |
2438 | ||
2439 | if (sinit.sinit_num_ostreams) | |
d808ad9a | 2440 | sp->initmsg.sinit_num_ostreams = sinit.sinit_num_ostreams; |
1da177e4 | 2441 | if (sinit.sinit_max_instreams) |
d808ad9a | 2442 | sp->initmsg.sinit_max_instreams = sinit.sinit_max_instreams; |
1da177e4 | 2443 | if (sinit.sinit_max_attempts) |
d808ad9a | 2444 | sp->initmsg.sinit_max_attempts = sinit.sinit_max_attempts; |
1da177e4 | 2445 | if (sinit.sinit_max_init_timeo) |
d808ad9a | 2446 | sp->initmsg.sinit_max_init_timeo = sinit.sinit_max_init_timeo; |
1da177e4 LT |
2447 | |
2448 | return 0; | |
2449 | } | |
2450 | ||
2451 | /* | |
2452 | * 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM) | |
2453 | * | |
2454 | * Applications that wish to use the sendto() system call may wish to | |
2455 | * specify a default set of parameters that would normally be supplied | |
2456 | * through the inclusion of ancillary data. This socket option allows | |
2457 | * such an application to set the default sctp_sndrcvinfo structure. | |
2458 | * The application that wishes to use this socket option simply passes | |
2459 | * in to this call the sctp_sndrcvinfo structure defined in Section | |
2460 | * 5.2.2) The input parameters accepted by this call include | |
2461 | * sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context, | |
2462 | * sinfo_timetolive. The user must provide the sinfo_assoc_id field in | |
2463 | * to this call if the caller is using the UDP model. | |
2464 | */ | |
2465 | static int sctp_setsockopt_default_send_param(struct sock *sk, | |
2466 | char __user *optval, int optlen) | |
2467 | { | |
2468 | struct sctp_sndrcvinfo info; | |
2469 | struct sctp_association *asoc; | |
2470 | struct sctp_sock *sp = sctp_sk(sk); | |
2471 | ||
2472 | if (optlen != sizeof(struct sctp_sndrcvinfo)) | |
2473 | return -EINVAL; | |
2474 | if (copy_from_user(&info, optval, optlen)) | |
2475 | return -EFAULT; | |
2476 | ||
2477 | asoc = sctp_id2assoc(sk, info.sinfo_assoc_id); | |
2478 | if (!asoc && info.sinfo_assoc_id && sctp_style(sk, UDP)) | |
2479 | return -EINVAL; | |
2480 | ||
2481 | if (asoc) { | |
2482 | asoc->default_stream = info.sinfo_stream; | |
2483 | asoc->default_flags = info.sinfo_flags; | |
2484 | asoc->default_ppid = info.sinfo_ppid; | |
2485 | asoc->default_context = info.sinfo_context; | |
2486 | asoc->default_timetolive = info.sinfo_timetolive; | |
2487 | } else { | |
2488 | sp->default_stream = info.sinfo_stream; | |
2489 | sp->default_flags = info.sinfo_flags; | |
2490 | sp->default_ppid = info.sinfo_ppid; | |
2491 | sp->default_context = info.sinfo_context; | |
2492 | sp->default_timetolive = info.sinfo_timetolive; | |
2493 | } | |
2494 | ||
2495 | return 0; | |
2496 | } | |
2497 | ||
2498 | /* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR) | |
2499 | * | |
2500 | * Requests that the local SCTP stack use the enclosed peer address as | |
2501 | * the association primary. The enclosed address must be one of the | |
2502 | * association peer's addresses. | |
2503 | */ | |
2504 | static int sctp_setsockopt_primary_addr(struct sock *sk, char __user *optval, | |
2505 | int optlen) | |
2506 | { | |
2507 | struct sctp_prim prim; | |
2508 | struct sctp_transport *trans; | |
2509 | ||
2510 | if (optlen != sizeof(struct sctp_prim)) | |
2511 | return -EINVAL; | |
2512 | ||
2513 | if (copy_from_user(&prim, optval, sizeof(struct sctp_prim))) | |
2514 | return -EFAULT; | |
2515 | ||
2516 | trans = sctp_addr_id2transport(sk, &prim.ssp_addr, prim.ssp_assoc_id); | |
2517 | if (!trans) | |
2518 | return -EINVAL; | |
2519 | ||
2520 | sctp_assoc_set_primary(trans->asoc, trans); | |
2521 | ||
2522 | return 0; | |
2523 | } | |
2524 | ||
2525 | /* | |
2526 | * 7.1.5 SCTP_NODELAY | |
2527 | * | |
2528 | * Turn on/off any Nagle-like algorithm. This means that packets are | |
2529 | * generally sent as soon as possible and no unnecessary delays are | |
2530 | * introduced, at the cost of more packets in the network. Expects an | |
2531 | * integer boolean flag. | |
2532 | */ | |
2533 | static int sctp_setsockopt_nodelay(struct sock *sk, char __user *optval, | |
2534 | int optlen) | |
2535 | { | |
2536 | int val; | |
2537 | ||
2538 | if (optlen < sizeof(int)) | |
2539 | return -EINVAL; | |
2540 | if (get_user(val, (int __user *)optval)) | |
2541 | return -EFAULT; | |
2542 | ||
2543 | sctp_sk(sk)->nodelay = (val == 0) ? 0 : 1; | |
2544 | return 0; | |
2545 | } | |
2546 | ||
2547 | /* | |
2548 | * | |
2549 | * 7.1.1 SCTP_RTOINFO | |
2550 | * | |
2551 | * The protocol parameters used to initialize and bound retransmission | |
2552 | * timeout (RTO) are tunable. sctp_rtoinfo structure is used to access | |
2553 | * and modify these parameters. | |
2554 | * All parameters are time values, in milliseconds. A value of 0, when | |
2555 | * modifying the parameters, indicates that the current value should not | |
2556 | * be changed. | |
2557 | * | |
2558 | */ | |
2559 | static int sctp_setsockopt_rtoinfo(struct sock *sk, char __user *optval, int optlen) { | |
2560 | struct sctp_rtoinfo rtoinfo; | |
2561 | struct sctp_association *asoc; | |
2562 | ||
2563 | if (optlen != sizeof (struct sctp_rtoinfo)) | |
2564 | return -EINVAL; | |
2565 | ||
2566 | if (copy_from_user(&rtoinfo, optval, optlen)) | |
2567 | return -EFAULT; | |
2568 | ||
2569 | asoc = sctp_id2assoc(sk, rtoinfo.srto_assoc_id); | |
2570 | ||
2571 | /* Set the values to the specific association */ | |
2572 | if (!asoc && rtoinfo.srto_assoc_id && sctp_style(sk, UDP)) | |
2573 | return -EINVAL; | |
2574 | ||
2575 | if (asoc) { | |
2576 | if (rtoinfo.srto_initial != 0) | |
d808ad9a | 2577 | asoc->rto_initial = |
1da177e4 LT |
2578 | msecs_to_jiffies(rtoinfo.srto_initial); |
2579 | if (rtoinfo.srto_max != 0) | |
2580 | asoc->rto_max = msecs_to_jiffies(rtoinfo.srto_max); | |
2581 | if (rtoinfo.srto_min != 0) | |
2582 | asoc->rto_min = msecs_to_jiffies(rtoinfo.srto_min); | |
2583 | } else { | |
2584 | /* If there is no association or the association-id = 0 | |
2585 | * set the values to the endpoint. | |
2586 | */ | |
2587 | struct sctp_sock *sp = sctp_sk(sk); | |
2588 | ||
2589 | if (rtoinfo.srto_initial != 0) | |
2590 | sp->rtoinfo.srto_initial = rtoinfo.srto_initial; | |
2591 | if (rtoinfo.srto_max != 0) | |
2592 | sp->rtoinfo.srto_max = rtoinfo.srto_max; | |
2593 | if (rtoinfo.srto_min != 0) | |
2594 | sp->rtoinfo.srto_min = rtoinfo.srto_min; | |
2595 | } | |
2596 | ||
2597 | return 0; | |
2598 | } | |
2599 | ||
2600 | /* | |
2601 | * | |
2602 | * 7.1.2 SCTP_ASSOCINFO | |
2603 | * | |
59c51591 | 2604 | * This option is used to tune the maximum retransmission attempts |
1da177e4 LT |
2605 | * of the association. |
2606 | * Returns an error if the new association retransmission value is | |
2607 | * greater than the sum of the retransmission value of the peer. | |
2608 | * See [SCTP] for more information. | |
2609 | * | |
2610 | */ | |
2611 | static int sctp_setsockopt_associnfo(struct sock *sk, char __user *optval, int optlen) | |
2612 | { | |
2613 | ||
2614 | struct sctp_assocparams assocparams; | |
2615 | struct sctp_association *asoc; | |
2616 | ||
2617 | if (optlen != sizeof(struct sctp_assocparams)) | |
2618 | return -EINVAL; | |
2619 | if (copy_from_user(&assocparams, optval, optlen)) | |
2620 | return -EFAULT; | |
2621 | ||
2622 | asoc = sctp_id2assoc(sk, assocparams.sasoc_assoc_id); | |
2623 | ||
2624 | if (!asoc && assocparams.sasoc_assoc_id && sctp_style(sk, UDP)) | |
2625 | return -EINVAL; | |
2626 | ||
2627 | /* Set the values to the specific association */ | |
2628 | if (asoc) { | |
402d68c4 VY |
2629 | if (assocparams.sasoc_asocmaxrxt != 0) { |
2630 | __u32 path_sum = 0; | |
2631 | int paths = 0; | |
2632 | struct list_head *pos; | |
2633 | struct sctp_transport *peer_addr; | |
2634 | ||
2635 | list_for_each(pos, &asoc->peer.transport_addr_list) { | |
2636 | peer_addr = list_entry(pos, | |
2637 | struct sctp_transport, | |
2638 | transports); | |
2639 | path_sum += peer_addr->pathmaxrxt; | |
2640 | paths++; | |
2641 | } | |
2642 | ||
2643 | /* Only validate asocmaxrxt if we have more then | |
2644 | * one path/transport. We do this because path | |
2645 | * retransmissions are only counted when we have more | |
2646 | * then one path. | |
2647 | */ | |
2648 | if (paths > 1 && | |
2649 | assocparams.sasoc_asocmaxrxt > path_sum) | |
2650 | return -EINVAL; | |
2651 | ||
1da177e4 | 2652 | asoc->max_retrans = assocparams.sasoc_asocmaxrxt; |
402d68c4 VY |
2653 | } |
2654 | ||
1da177e4 LT |
2655 | if (assocparams.sasoc_cookie_life != 0) { |
2656 | asoc->cookie_life.tv_sec = | |
2657 | assocparams.sasoc_cookie_life / 1000; | |
2658 | asoc->cookie_life.tv_usec = | |
2659 | (assocparams.sasoc_cookie_life % 1000) | |
2660 | * 1000; | |
2661 | } | |
2662 | } else { | |
2663 | /* Set the values to the endpoint */ | |
2664 | struct sctp_sock *sp = sctp_sk(sk); | |
2665 | ||
2666 | if (assocparams.sasoc_asocmaxrxt != 0) | |
2667 | sp->assocparams.sasoc_asocmaxrxt = | |
2668 | assocparams.sasoc_asocmaxrxt; | |
2669 | if (assocparams.sasoc_cookie_life != 0) | |
2670 | sp->assocparams.sasoc_cookie_life = | |
2671 | assocparams.sasoc_cookie_life; | |
2672 | } | |
2673 | return 0; | |
2674 | } | |
2675 | ||
2676 | /* | |
2677 | * 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR) | |
2678 | * | |
2679 | * This socket option is a boolean flag which turns on or off mapped V4 | |
2680 | * addresses. If this option is turned on and the socket is type | |
2681 | * PF_INET6, then IPv4 addresses will be mapped to V6 representation. | |
2682 | * If this option is turned off, then no mapping will be done of V4 | |
2683 | * addresses and a user will receive both PF_INET6 and PF_INET type | |
2684 | * addresses on the socket. | |
2685 | */ | |
2686 | static int sctp_setsockopt_mappedv4(struct sock *sk, char __user *optval, int optlen) | |
2687 | { | |
2688 | int val; | |
2689 | struct sctp_sock *sp = sctp_sk(sk); | |
2690 | ||
2691 | if (optlen < sizeof(int)) | |
2692 | return -EINVAL; | |
2693 | if (get_user(val, (int __user *)optval)) | |
2694 | return -EFAULT; | |
2695 | if (val) | |
2696 | sp->v4mapped = 1; | |
2697 | else | |
2698 | sp->v4mapped = 0; | |
2699 | ||
2700 | return 0; | |
2701 | } | |
2702 | ||
2703 | /* | |
2704 | * 7.1.17 Set the maximum fragrmentation size (SCTP_MAXSEG) | |
2705 | * | |
2706 | * This socket option specifies the maximum size to put in any outgoing | |
2707 | * SCTP chunk. If a message is larger than this size it will be | |
2708 | * fragmented by SCTP into the specified size. Note that the underlying | |
2709 | * SCTP implementation may fragment into smaller sized chunks when the | |
2710 | * PMTU of the underlying association is smaller than the value set by | |
2711 | * the user. | |
2712 | */ | |
2713 | static int sctp_setsockopt_maxseg(struct sock *sk, char __user *optval, int optlen) | |
2714 | { | |
2715 | struct sctp_association *asoc; | |
2716 | struct list_head *pos; | |
2717 | struct sctp_sock *sp = sctp_sk(sk); | |
2718 | int val; | |
2719 | ||
2720 | if (optlen < sizeof(int)) | |
2721 | return -EINVAL; | |
2722 | if (get_user(val, (int __user *)optval)) | |
2723 | return -EFAULT; | |
96a33998 | 2724 | if ((val != 0) && ((val < 8) || (val > SCTP_MAX_CHUNK_LEN))) |
1da177e4 LT |
2725 | return -EINVAL; |
2726 | sp->user_frag = val; | |
2727 | ||
96a33998 ISJ |
2728 | /* Update the frag_point of the existing associations. */ |
2729 | list_for_each(pos, &(sp->ep->asocs)) { | |
2730 | asoc = list_entry(pos, struct sctp_association, asocs); | |
d808ad9a | 2731 | asoc->frag_point = sctp_frag_point(sp, asoc->pathmtu); |
1da177e4 LT |
2732 | } |
2733 | ||
2734 | return 0; | |
2735 | } | |
2736 | ||
2737 | ||
2738 | /* | |
2739 | * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR) | |
2740 | * | |
2741 | * Requests that the peer mark the enclosed address as the association | |
2742 | * primary. The enclosed address must be one of the association's | |
2743 | * locally bound addresses. The following structure is used to make a | |
2744 | * set primary request: | |
2745 | */ | |
2746 | static int sctp_setsockopt_peer_primary_addr(struct sock *sk, char __user *optval, | |
2747 | int optlen) | |
2748 | { | |
2749 | struct sctp_sock *sp; | |
2750 | struct sctp_endpoint *ep; | |
2751 | struct sctp_association *asoc = NULL; | |
2752 | struct sctp_setpeerprim prim; | |
2753 | struct sctp_chunk *chunk; | |
2754 | int err; | |
2755 | ||
2756 | sp = sctp_sk(sk); | |
2757 | ep = sp->ep; | |
2758 | ||
2759 | if (!sctp_addip_enable) | |
2760 | return -EPERM; | |
2761 | ||
2762 | if (optlen != sizeof(struct sctp_setpeerprim)) | |
2763 | return -EINVAL; | |
2764 | ||
2765 | if (copy_from_user(&prim, optval, optlen)) | |
2766 | return -EFAULT; | |
2767 | ||
2768 | asoc = sctp_id2assoc(sk, prim.sspp_assoc_id); | |
d808ad9a | 2769 | if (!asoc) |
1da177e4 LT |
2770 | return -EINVAL; |
2771 | ||
2772 | if (!asoc->peer.asconf_capable) | |
2773 | return -EPERM; | |
2774 | ||
2775 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_SET_PRIMARY) | |
2776 | return -EPERM; | |
2777 | ||
2778 | if (!sctp_state(asoc, ESTABLISHED)) | |
2779 | return -ENOTCONN; | |
2780 | ||
2781 | if (!sctp_assoc_lookup_laddr(asoc, (union sctp_addr *)&prim.sspp_addr)) | |
2782 | return -EADDRNOTAVAIL; | |
2783 | ||
2784 | /* Create an ASCONF chunk with SET_PRIMARY parameter */ | |
2785 | chunk = sctp_make_asconf_set_prim(asoc, | |
2786 | (union sctp_addr *)&prim.sspp_addr); | |
2787 | if (!chunk) | |
2788 | return -ENOMEM; | |
2789 | ||
2790 | err = sctp_send_asconf(asoc, chunk); | |
2791 | ||
2792 | SCTP_DEBUG_PRINTK("We set peer primary addr primitively.\n"); | |
2793 | ||
2794 | return err; | |
2795 | } | |
2796 | ||
0f3fffd8 | 2797 | static int sctp_setsockopt_adaptation_layer(struct sock *sk, char __user *optval, |
1da177e4 LT |
2798 | int optlen) |
2799 | { | |
0f3fffd8 | 2800 | struct sctp_setadaptation adaptation; |
1da177e4 | 2801 | |
0f3fffd8 | 2802 | if (optlen != sizeof(struct sctp_setadaptation)) |
1da177e4 | 2803 | return -EINVAL; |
0f3fffd8 | 2804 | if (copy_from_user(&adaptation, optval, optlen)) |
1da177e4 LT |
2805 | return -EFAULT; |
2806 | ||
0f3fffd8 | 2807 | sctp_sk(sk)->adaptation_ind = adaptation.ssb_adaptation_ind; |
1da177e4 LT |
2808 | |
2809 | return 0; | |
2810 | } | |
2811 | ||
6ab792f5 ISJ |
2812 | /* |
2813 | * 7.1.29. Set or Get the default context (SCTP_CONTEXT) | |
2814 | * | |
2815 | * The context field in the sctp_sndrcvinfo structure is normally only | |
2816 | * used when a failed message is retrieved holding the value that was | |
2817 | * sent down on the actual send call. This option allows the setting of | |
2818 | * a default context on an association basis that will be received on | |
2819 | * reading messages from the peer. This is especially helpful in the | |
2820 | * one-2-many model for an application to keep some reference to an | |
2821 | * internal state machine that is processing messages on the | |
2822 | * association. Note that the setting of this value only effects | |
2823 | * received messages from the peer and does not effect the value that is | |
2824 | * saved with outbound messages. | |
2825 | */ | |
2826 | static int sctp_setsockopt_context(struct sock *sk, char __user *optval, | |
2827 | int optlen) | |
2828 | { | |
2829 | struct sctp_assoc_value params; | |
2830 | struct sctp_sock *sp; | |
2831 | struct sctp_association *asoc; | |
2832 | ||
2833 | if (optlen != sizeof(struct sctp_assoc_value)) | |
2834 | return -EINVAL; | |
2835 | if (copy_from_user(¶ms, optval, optlen)) | |
2836 | return -EFAULT; | |
2837 | ||
2838 | sp = sctp_sk(sk); | |
2839 | ||
2840 | if (params.assoc_id != 0) { | |
2841 | asoc = sctp_id2assoc(sk, params.assoc_id); | |
2842 | if (!asoc) | |
2843 | return -EINVAL; | |
2844 | asoc->default_rcv_context = params.assoc_value; | |
2845 | } else { | |
2846 | sp->default_rcv_context = params.assoc_value; | |
2847 | } | |
2848 | ||
2849 | return 0; | |
2850 | } | |
2851 | ||
b6e1331f VY |
2852 | /* |
2853 | * 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE) | |
2854 | * | |
2855 | * This options will at a minimum specify if the implementation is doing | |
2856 | * fragmented interleave. Fragmented interleave, for a one to many | |
2857 | * socket, is when subsequent calls to receive a message may return | |
2858 | * parts of messages from different associations. Some implementations | |
2859 | * may allow you to turn this value on or off. If so, when turned off, | |
2860 | * no fragment interleave will occur (which will cause a head of line | |
2861 | * blocking amongst multiple associations sharing the same one to many | |
2862 | * socket). When this option is turned on, then each receive call may | |
2863 | * come from a different association (thus the user must receive data | |
2864 | * with the extended calls (e.g. sctp_recvmsg) to keep track of which | |
2865 | * association each receive belongs to. | |
2866 | * | |
2867 | * This option takes a boolean value. A non-zero value indicates that | |
2868 | * fragmented interleave is on. A value of zero indicates that | |
2869 | * fragmented interleave is off. | |
2870 | * | |
2871 | * Note that it is important that an implementation that allows this | |
2872 | * option to be turned on, have it off by default. Otherwise an unaware | |
2873 | * application using the one to many model may become confused and act | |
2874 | * incorrectly. | |
2875 | */ | |
2876 | static int sctp_setsockopt_fragment_interleave(struct sock *sk, | |
2877 | char __user *optval, | |
2878 | int optlen) | |
2879 | { | |
2880 | int val; | |
2881 | ||
2882 | if (optlen != sizeof(int)) | |
2883 | return -EINVAL; | |
2884 | if (get_user(val, (int __user *)optval)) | |
2885 | return -EFAULT; | |
2886 | ||
2887 | sctp_sk(sk)->frag_interleave = (val == 0) ? 0 : 1; | |
2888 | ||
2889 | return 0; | |
2890 | } | |
2891 | ||
d49d91d7 VY |
2892 | /* |
2893 | * 7.1.25. Set or Get the sctp partial delivery point | |
2894 | * (SCTP_PARTIAL_DELIVERY_POINT) | |
2895 | * This option will set or get the SCTP partial delivery point. This | |
2896 | * point is the size of a message where the partial delivery API will be | |
2897 | * invoked to help free up rwnd space for the peer. Setting this to a | |
2898 | * lower value will cause partial delivery's to happen more often. The | |
2899 | * calls argument is an integer that sets or gets the partial delivery | |
2900 | * point. | |
2901 | */ | |
2902 | static int sctp_setsockopt_partial_delivery_point(struct sock *sk, | |
2903 | char __user *optval, | |
2904 | int optlen) | |
2905 | { | |
2906 | u32 val; | |
2907 | ||
2908 | if (optlen != sizeof(u32)) | |
2909 | return -EINVAL; | |
2910 | if (get_user(val, (int __user *)optval)) | |
2911 | return -EFAULT; | |
2912 | ||
2913 | sctp_sk(sk)->pd_point = val; | |
2914 | ||
2915 | return 0; /* is this the right error code? */ | |
2916 | } | |
2917 | ||
70331571 VY |
2918 | /* |
2919 | * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST) | |
2920 | * | |
2921 | * This option will allow a user to change the maximum burst of packets | |
2922 | * that can be emitted by this association. Note that the default value | |
2923 | * is 4, and some implementations may restrict this setting so that it | |
2924 | * can only be lowered. | |
2925 | * | |
2926 | * NOTE: This text doesn't seem right. Do this on a socket basis with | |
2927 | * future associations inheriting the socket value. | |
2928 | */ | |
2929 | static int sctp_setsockopt_maxburst(struct sock *sk, | |
2930 | char __user *optval, | |
2931 | int optlen) | |
2932 | { | |
2933 | int val; | |
2934 | ||
2935 | if (optlen != sizeof(int)) | |
2936 | return -EINVAL; | |
2937 | if (get_user(val, (int __user *)optval)) | |
2938 | return -EFAULT; | |
2939 | ||
2940 | if (val < 0) | |
2941 | return -EINVAL; | |
2942 | ||
2943 | sctp_sk(sk)->max_burst = val; | |
2944 | ||
2945 | return 0; | |
2946 | } | |
2947 | ||
1da177e4 LT |
2948 | /* API 6.2 setsockopt(), getsockopt() |
2949 | * | |
2950 | * Applications use setsockopt() and getsockopt() to set or retrieve | |
2951 | * socket options. Socket options are used to change the default | |
2952 | * behavior of sockets calls. They are described in Section 7. | |
2953 | * | |
2954 | * The syntax is: | |
2955 | * | |
2956 | * ret = getsockopt(int sd, int level, int optname, void __user *optval, | |
2957 | * int __user *optlen); | |
2958 | * ret = setsockopt(int sd, int level, int optname, const void __user *optval, | |
2959 | * int optlen); | |
2960 | * | |
2961 | * sd - the socket descript. | |
2962 | * level - set to IPPROTO_SCTP for all SCTP options. | |
2963 | * optname - the option name. | |
2964 | * optval - the buffer to store the value of the option. | |
2965 | * optlen - the size of the buffer. | |
2966 | */ | |
2967 | SCTP_STATIC int sctp_setsockopt(struct sock *sk, int level, int optname, | |
2968 | char __user *optval, int optlen) | |
2969 | { | |
2970 | int retval = 0; | |
2971 | ||
2972 | SCTP_DEBUG_PRINTK("sctp_setsockopt(sk: %p... optname: %d)\n", | |
2973 | sk, optname); | |
2974 | ||
2975 | /* I can hardly begin to describe how wrong this is. This is | |
2976 | * so broken as to be worse than useless. The API draft | |
2977 | * REALLY is NOT helpful here... I am not convinced that the | |
2978 | * semantics of setsockopt() with a level OTHER THAN SOL_SCTP | |
2979 | * are at all well-founded. | |
2980 | */ | |
2981 | if (level != SOL_SCTP) { | |
2982 | struct sctp_af *af = sctp_sk(sk)->pf->af; | |
2983 | retval = af->setsockopt(sk, level, optname, optval, optlen); | |
2984 | goto out_nounlock; | |
2985 | } | |
2986 | ||
2987 | sctp_lock_sock(sk); | |
2988 | ||
2989 | switch (optname) { | |
2990 | case SCTP_SOCKOPT_BINDX_ADD: | |
2991 | /* 'optlen' is the size of the addresses buffer. */ | |
2992 | retval = sctp_setsockopt_bindx(sk, (struct sockaddr __user *)optval, | |
2993 | optlen, SCTP_BINDX_ADD_ADDR); | |
2994 | break; | |
2995 | ||
2996 | case SCTP_SOCKOPT_BINDX_REM: | |
2997 | /* 'optlen' is the size of the addresses buffer. */ | |
2998 | retval = sctp_setsockopt_bindx(sk, (struct sockaddr __user *)optval, | |
2999 | optlen, SCTP_BINDX_REM_ADDR); | |
3000 | break; | |
3001 | ||
3f7a87d2 FF |
3002 | case SCTP_SOCKOPT_CONNECTX: |
3003 | /* 'optlen' is the size of the addresses buffer. */ | |
3004 | retval = sctp_setsockopt_connectx(sk, (struct sockaddr __user *)optval, | |
3005 | optlen); | |
3006 | break; | |
3007 | ||
1da177e4 LT |
3008 | case SCTP_DISABLE_FRAGMENTS: |
3009 | retval = sctp_setsockopt_disable_fragments(sk, optval, optlen); | |
3010 | break; | |
3011 | ||
3012 | case SCTP_EVENTS: | |
3013 | retval = sctp_setsockopt_events(sk, optval, optlen); | |
3014 | break; | |
3015 | ||
3016 | case SCTP_AUTOCLOSE: | |
3017 | retval = sctp_setsockopt_autoclose(sk, optval, optlen); | |
3018 | break; | |
3019 | ||
3020 | case SCTP_PEER_ADDR_PARAMS: | |
3021 | retval = sctp_setsockopt_peer_addr_params(sk, optval, optlen); | |
3022 | break; | |
3023 | ||
7708610b FF |
3024 | case SCTP_DELAYED_ACK_TIME: |
3025 | retval = sctp_setsockopt_delayed_ack_time(sk, optval, optlen); | |
3026 | break; | |
d49d91d7 VY |
3027 | case SCTP_PARTIAL_DELIVERY_POINT: |
3028 | retval = sctp_setsockopt_partial_delivery_point(sk, optval, optlen); | |
3029 | break; | |
7708610b | 3030 | |
1da177e4 LT |
3031 | case SCTP_INITMSG: |
3032 | retval = sctp_setsockopt_initmsg(sk, optval, optlen); | |
3033 | break; | |
3034 | case SCTP_DEFAULT_SEND_PARAM: | |
3035 | retval = sctp_setsockopt_default_send_param(sk, optval, | |
3036 | optlen); | |
3037 | break; | |
3038 | case SCTP_PRIMARY_ADDR: | |
3039 | retval = sctp_setsockopt_primary_addr(sk, optval, optlen); | |
3040 | break; | |
3041 | case SCTP_SET_PEER_PRIMARY_ADDR: | |
3042 | retval = sctp_setsockopt_peer_primary_addr(sk, optval, optlen); | |
3043 | break; | |
3044 | case SCTP_NODELAY: | |
3045 | retval = sctp_setsockopt_nodelay(sk, optval, optlen); | |
3046 | break; | |
3047 | case SCTP_RTOINFO: | |
3048 | retval = sctp_setsockopt_rtoinfo(sk, optval, optlen); | |
3049 | break; | |
3050 | case SCTP_ASSOCINFO: | |
3051 | retval = sctp_setsockopt_associnfo(sk, optval, optlen); | |
3052 | break; | |
3053 | case SCTP_I_WANT_MAPPED_V4_ADDR: | |
3054 | retval = sctp_setsockopt_mappedv4(sk, optval, optlen); | |
3055 | break; | |
3056 | case SCTP_MAXSEG: | |
3057 | retval = sctp_setsockopt_maxseg(sk, optval, optlen); | |
3058 | break; | |
0f3fffd8 ISJ |
3059 | case SCTP_ADAPTATION_LAYER: |
3060 | retval = sctp_setsockopt_adaptation_layer(sk, optval, optlen); | |
1da177e4 | 3061 | break; |
6ab792f5 ISJ |
3062 | case SCTP_CONTEXT: |
3063 | retval = sctp_setsockopt_context(sk, optval, optlen); | |
3064 | break; | |
b6e1331f VY |
3065 | case SCTP_FRAGMENT_INTERLEAVE: |
3066 | retval = sctp_setsockopt_fragment_interleave(sk, optval, optlen); | |
3067 | break; | |
70331571 VY |
3068 | case SCTP_MAX_BURST: |
3069 | retval = sctp_setsockopt_maxburst(sk, optval, optlen); | |
3070 | break; | |
1da177e4 LT |
3071 | default: |
3072 | retval = -ENOPROTOOPT; | |
3073 | break; | |
3ff50b79 | 3074 | } |
1da177e4 LT |
3075 | |
3076 | sctp_release_sock(sk); | |
3077 | ||
3078 | out_nounlock: | |
3079 | return retval; | |
3080 | } | |
3081 | ||
3082 | /* API 3.1.6 connect() - UDP Style Syntax | |
3083 | * | |
3084 | * An application may use the connect() call in the UDP model to initiate an | |
3085 | * association without sending data. | |
3086 | * | |
3087 | * The syntax is: | |
3088 | * | |
3089 | * ret = connect(int sd, const struct sockaddr *nam, socklen_t len); | |
3090 | * | |
3091 | * sd: the socket descriptor to have a new association added to. | |
3092 | * | |
3093 | * nam: the address structure (either struct sockaddr_in or struct | |
3094 | * sockaddr_in6 defined in RFC2553 [7]). | |
3095 | * | |
3096 | * len: the size of the address. | |
3097 | */ | |
3f7a87d2 | 3098 | SCTP_STATIC int sctp_connect(struct sock *sk, struct sockaddr *addr, |
1da177e4 LT |
3099 | int addr_len) |
3100 | { | |
1da177e4 | 3101 | int err = 0; |
3f7a87d2 | 3102 | struct sctp_af *af; |
1da177e4 LT |
3103 | |
3104 | sctp_lock_sock(sk); | |
3105 | ||
3f7a87d2 FF |
3106 | SCTP_DEBUG_PRINTK("%s - sk: %p, sockaddr: %p, addr_len: %d\n", |
3107 | __FUNCTION__, sk, addr, addr_len); | |
1da177e4 | 3108 | |
3f7a87d2 FF |
3109 | /* Validate addr_len before calling common connect/connectx routine. */ |
3110 | af = sctp_get_af_specific(addr->sa_family); | |
3111 | if (!af || addr_len < af->sockaddr_len) { | |
3112 | err = -EINVAL; | |
3113 | } else { | |
3114 | /* Pass correct addr len to common routine (so it knows there | |
3115 | * is only one address being passed. | |
3116 | */ | |
3117 | err = __sctp_connect(sk, addr, af->sockaddr_len); | |
1da177e4 LT |
3118 | } |
3119 | ||
1da177e4 | 3120 | sctp_release_sock(sk); |
1da177e4 LT |
3121 | return err; |
3122 | } | |
3123 | ||
3124 | /* FIXME: Write comments. */ | |
3125 | SCTP_STATIC int sctp_disconnect(struct sock *sk, int flags) | |
3126 | { | |
3127 | return -EOPNOTSUPP; /* STUB */ | |
3128 | } | |
3129 | ||
3130 | /* 4.1.4 accept() - TCP Style Syntax | |
3131 | * | |
3132 | * Applications use accept() call to remove an established SCTP | |
3133 | * association from the accept queue of the endpoint. A new socket | |
3134 | * descriptor will be returned from accept() to represent the newly | |
3135 | * formed association. | |
3136 | */ | |
3137 | SCTP_STATIC struct sock *sctp_accept(struct sock *sk, int flags, int *err) | |
3138 | { | |
3139 | struct sctp_sock *sp; | |
3140 | struct sctp_endpoint *ep; | |
3141 | struct sock *newsk = NULL; | |
3142 | struct sctp_association *asoc; | |
3143 | long timeo; | |
3144 | int error = 0; | |
3145 | ||
3146 | sctp_lock_sock(sk); | |
3147 | ||
3148 | sp = sctp_sk(sk); | |
3149 | ep = sp->ep; | |
3150 | ||
3151 | if (!sctp_style(sk, TCP)) { | |
3152 | error = -EOPNOTSUPP; | |
3153 | goto out; | |
3154 | } | |
3155 | ||
3156 | if (!sctp_sstate(sk, LISTENING)) { | |
3157 | error = -EINVAL; | |
3158 | goto out; | |
3159 | } | |
3160 | ||
8abfedd8 | 3161 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
1da177e4 LT |
3162 | |
3163 | error = sctp_wait_for_accept(sk, timeo); | |
3164 | if (error) | |
3165 | goto out; | |
3166 | ||
3167 | /* We treat the list of associations on the endpoint as the accept | |
3168 | * queue and pick the first association on the list. | |
3169 | */ | |
3170 | asoc = list_entry(ep->asocs.next, struct sctp_association, asocs); | |
3171 | ||
3172 | newsk = sp->pf->create_accept_sk(sk, asoc); | |
3173 | if (!newsk) { | |
3174 | error = -ENOMEM; | |
3175 | goto out; | |
3176 | } | |
3177 | ||
3178 | /* Populate the fields of the newsk from the oldsk and migrate the | |
3179 | * asoc to the newsk. | |
3180 | */ | |
3181 | sctp_sock_migrate(sk, newsk, asoc, SCTP_SOCKET_TCP); | |
3182 | ||
3183 | out: | |
3184 | sctp_release_sock(sk); | |
d808ad9a | 3185 | *err = error; |
1da177e4 LT |
3186 | return newsk; |
3187 | } | |
3188 | ||
3189 | /* The SCTP ioctl handler. */ | |
3190 | SCTP_STATIC int sctp_ioctl(struct sock *sk, int cmd, unsigned long arg) | |
3191 | { | |
3192 | return -ENOIOCTLCMD; | |
3193 | } | |
3194 | ||
3195 | /* This is the function which gets called during socket creation to | |
3196 | * initialized the SCTP-specific portion of the sock. | |
3197 | * The sock structure should already be zero-filled memory. | |
3198 | */ | |
3199 | SCTP_STATIC int sctp_init_sock(struct sock *sk) | |
3200 | { | |
3201 | struct sctp_endpoint *ep; | |
3202 | struct sctp_sock *sp; | |
3203 | ||
3204 | SCTP_DEBUG_PRINTK("sctp_init_sock(sk: %p)\n", sk); | |
3205 | ||
3206 | sp = sctp_sk(sk); | |
3207 | ||
3208 | /* Initialize the SCTP per socket area. */ | |
3209 | switch (sk->sk_type) { | |
3210 | case SOCK_SEQPACKET: | |
3211 | sp->type = SCTP_SOCKET_UDP; | |
3212 | break; | |
3213 | case SOCK_STREAM: | |
3214 | sp->type = SCTP_SOCKET_TCP; | |
3215 | break; | |
3216 | default: | |
3217 | return -ESOCKTNOSUPPORT; | |
3218 | } | |
3219 | ||
3220 | /* Initialize default send parameters. These parameters can be | |
3221 | * modified with the SCTP_DEFAULT_SEND_PARAM socket option. | |
3222 | */ | |
3223 | sp->default_stream = 0; | |
3224 | sp->default_ppid = 0; | |
3225 | sp->default_flags = 0; | |
3226 | sp->default_context = 0; | |
3227 | sp->default_timetolive = 0; | |
3228 | ||
6ab792f5 | 3229 | sp->default_rcv_context = 0; |
70331571 | 3230 | sp->max_burst = sctp_max_burst; |
6ab792f5 | 3231 | |
1da177e4 LT |
3232 | /* Initialize default setup parameters. These parameters |
3233 | * can be modified with the SCTP_INITMSG socket option or | |
3234 | * overridden by the SCTP_INIT CMSG. | |
3235 | */ | |
3236 | sp->initmsg.sinit_num_ostreams = sctp_max_outstreams; | |
3237 | sp->initmsg.sinit_max_instreams = sctp_max_instreams; | |
3238 | sp->initmsg.sinit_max_attempts = sctp_max_retrans_init; | |
3fd091e7 | 3239 | sp->initmsg.sinit_max_init_timeo = sctp_rto_max; |
1da177e4 LT |
3240 | |
3241 | /* Initialize default RTO related parameters. These parameters can | |
3242 | * be modified for with the SCTP_RTOINFO socket option. | |
3243 | */ | |
3fd091e7 VY |
3244 | sp->rtoinfo.srto_initial = sctp_rto_initial; |
3245 | sp->rtoinfo.srto_max = sctp_rto_max; | |
3246 | sp->rtoinfo.srto_min = sctp_rto_min; | |
1da177e4 LT |
3247 | |
3248 | /* Initialize default association related parameters. These parameters | |
3249 | * can be modified with the SCTP_ASSOCINFO socket option. | |
3250 | */ | |
3251 | sp->assocparams.sasoc_asocmaxrxt = sctp_max_retrans_association; | |
3252 | sp->assocparams.sasoc_number_peer_destinations = 0; | |
3253 | sp->assocparams.sasoc_peer_rwnd = 0; | |
3254 | sp->assocparams.sasoc_local_rwnd = 0; | |
3fd091e7 | 3255 | sp->assocparams.sasoc_cookie_life = sctp_valid_cookie_life; |
1da177e4 LT |
3256 | |
3257 | /* Initialize default event subscriptions. By default, all the | |
d808ad9a | 3258 | * options are off. |
1da177e4 LT |
3259 | */ |
3260 | memset(&sp->subscribe, 0, sizeof(struct sctp_event_subscribe)); | |
3261 | ||
3262 | /* Default Peer Address Parameters. These defaults can | |
3263 | * be modified via SCTP_PEER_ADDR_PARAMS | |
3264 | */ | |
3fd091e7 | 3265 | sp->hbinterval = sctp_hb_interval; |
52ccb8e9 FF |
3266 | sp->pathmaxrxt = sctp_max_retrans_path; |
3267 | sp->pathmtu = 0; // allow default discovery | |
3fd091e7 | 3268 | sp->sackdelay = sctp_sack_timeout; |
52ccb8e9 | 3269 | sp->param_flags = SPP_HB_ENABLE | |
d808ad9a YH |
3270 | SPP_PMTUD_ENABLE | |
3271 | SPP_SACKDELAY_ENABLE; | |
1da177e4 LT |
3272 | |
3273 | /* If enabled no SCTP message fragmentation will be performed. | |
3274 | * Configure through SCTP_DISABLE_FRAGMENTS socket option. | |
3275 | */ | |
3276 | sp->disable_fragments = 0; | |
3277 | ||
208edef6 SS |
3278 | /* Enable Nagle algorithm by default. */ |
3279 | sp->nodelay = 0; | |
1da177e4 LT |
3280 | |
3281 | /* Enable by default. */ | |
3282 | sp->v4mapped = 1; | |
3283 | ||
3284 | /* Auto-close idle associations after the configured | |
3285 | * number of seconds. A value of 0 disables this | |
3286 | * feature. Configure through the SCTP_AUTOCLOSE socket option, | |
3287 | * for UDP-style sockets only. | |
3288 | */ | |
3289 | sp->autoclose = 0; | |
3290 | ||
3291 | /* User specified fragmentation limit. */ | |
3292 | sp->user_frag = 0; | |
3293 | ||
0f3fffd8 | 3294 | sp->adaptation_ind = 0; |
1da177e4 LT |
3295 | |
3296 | sp->pf = sctp_get_pf_specific(sk->sk_family); | |
3297 | ||
3298 | /* Control variables for partial data delivery. */ | |
b6e1331f | 3299 | atomic_set(&sp->pd_mode, 0); |
1da177e4 | 3300 | skb_queue_head_init(&sp->pd_lobby); |
b6e1331f | 3301 | sp->frag_interleave = 0; |
1da177e4 LT |
3302 | |
3303 | /* Create a per socket endpoint structure. Even if we | |
3304 | * change the data structure relationships, this may still | |
3305 | * be useful for storing pre-connect address information. | |
3306 | */ | |
3307 | ep = sctp_endpoint_new(sk, GFP_KERNEL); | |
3308 | if (!ep) | |
3309 | return -ENOMEM; | |
3310 | ||
3311 | sp->ep = ep; | |
3312 | sp->hmac = NULL; | |
3313 | ||
3314 | SCTP_DBG_OBJCNT_INC(sock); | |
3315 | return 0; | |
3316 | } | |
3317 | ||
3318 | /* Cleanup any SCTP per socket resources. */ | |
3319 | SCTP_STATIC int sctp_destroy_sock(struct sock *sk) | |
3320 | { | |
3321 | struct sctp_endpoint *ep; | |
3322 | ||
3323 | SCTP_DEBUG_PRINTK("sctp_destroy_sock(sk: %p)\n", sk); | |
3324 | ||
3325 | /* Release our hold on the endpoint. */ | |
3326 | ep = sctp_sk(sk)->ep; | |
3327 | sctp_endpoint_free(ep); | |
3328 | ||
3329 | return 0; | |
3330 | } | |
3331 | ||
3332 | /* API 4.1.7 shutdown() - TCP Style Syntax | |
3333 | * int shutdown(int socket, int how); | |
3334 | * | |
3335 | * sd - the socket descriptor of the association to be closed. | |
3336 | * how - Specifies the type of shutdown. The values are | |
3337 | * as follows: | |
3338 | * SHUT_RD | |
3339 | * Disables further receive operations. No SCTP | |
3340 | * protocol action is taken. | |
3341 | * SHUT_WR | |
3342 | * Disables further send operations, and initiates | |
3343 | * the SCTP shutdown sequence. | |
3344 | * SHUT_RDWR | |
3345 | * Disables further send and receive operations | |
3346 | * and initiates the SCTP shutdown sequence. | |
3347 | */ | |
3348 | SCTP_STATIC void sctp_shutdown(struct sock *sk, int how) | |
3349 | { | |
3350 | struct sctp_endpoint *ep; | |
3351 | struct sctp_association *asoc; | |
3352 | ||
3353 | if (!sctp_style(sk, TCP)) | |
3354 | return; | |
3355 | ||
3356 | if (how & SEND_SHUTDOWN) { | |
3357 | ep = sctp_sk(sk)->ep; | |
3358 | if (!list_empty(&ep->asocs)) { | |
3359 | asoc = list_entry(ep->asocs.next, | |
3360 | struct sctp_association, asocs); | |
3361 | sctp_primitive_SHUTDOWN(asoc, NULL); | |
3362 | } | |
3363 | } | |
3364 | } | |
3365 | ||
3366 | /* 7.2.1 Association Status (SCTP_STATUS) | |
3367 | ||
3368 | * Applications can retrieve current status information about an | |
3369 | * association, including association state, peer receiver window size, | |
3370 | * number of unacked data chunks, and number of data chunks pending | |
3371 | * receipt. This information is read-only. | |
3372 | */ | |
3373 | static int sctp_getsockopt_sctp_status(struct sock *sk, int len, | |
3374 | char __user *optval, | |
3375 | int __user *optlen) | |
3376 | { | |
3377 | struct sctp_status status; | |
3378 | struct sctp_association *asoc = NULL; | |
3379 | struct sctp_transport *transport; | |
3380 | sctp_assoc_t associd; | |
3381 | int retval = 0; | |
3382 | ||
408f22e8 | 3383 | if (len < sizeof(status)) { |
1da177e4 LT |
3384 | retval = -EINVAL; |
3385 | goto out; | |
3386 | } | |
3387 | ||
408f22e8 NH |
3388 | len = sizeof(status); |
3389 | if (copy_from_user(&status, optval, len)) { | |
1da177e4 LT |
3390 | retval = -EFAULT; |
3391 | goto out; | |
3392 | } | |
3393 | ||
3394 | associd = status.sstat_assoc_id; | |
3395 | asoc = sctp_id2assoc(sk, associd); | |
3396 | if (!asoc) { | |
3397 | retval = -EINVAL; | |
3398 | goto out; | |
3399 | } | |
3400 | ||
3401 | transport = asoc->peer.primary_path; | |
3402 | ||
3403 | status.sstat_assoc_id = sctp_assoc2id(asoc); | |
3404 | status.sstat_state = asoc->state; | |
3405 | status.sstat_rwnd = asoc->peer.rwnd; | |
3406 | status.sstat_unackdata = asoc->unack_data; | |
3407 | ||
3408 | status.sstat_penddata = sctp_tsnmap_pending(&asoc->peer.tsn_map); | |
3409 | status.sstat_instrms = asoc->c.sinit_max_instreams; | |
3410 | status.sstat_outstrms = asoc->c.sinit_num_ostreams; | |
3411 | status.sstat_fragmentation_point = asoc->frag_point; | |
3412 | status.sstat_primary.spinfo_assoc_id = sctp_assoc2id(transport->asoc); | |
8cec6b80 AV |
3413 | memcpy(&status.sstat_primary.spinfo_address, &transport->ipaddr, |
3414 | transport->af_specific->sockaddr_len); | |
1da177e4 LT |
3415 | /* Map ipv4 address into v4-mapped-on-v6 address. */ |
3416 | sctp_get_pf_specific(sk->sk_family)->addr_v4map(sctp_sk(sk), | |
3417 | (union sctp_addr *)&status.sstat_primary.spinfo_address); | |
3f7a87d2 | 3418 | status.sstat_primary.spinfo_state = transport->state; |
1da177e4 LT |
3419 | status.sstat_primary.spinfo_cwnd = transport->cwnd; |
3420 | status.sstat_primary.spinfo_srtt = transport->srtt; | |
3421 | status.sstat_primary.spinfo_rto = jiffies_to_msecs(transport->rto); | |
52ccb8e9 | 3422 | status.sstat_primary.spinfo_mtu = transport->pathmtu; |
1da177e4 | 3423 | |
3f7a87d2 FF |
3424 | if (status.sstat_primary.spinfo_state == SCTP_UNKNOWN) |
3425 | status.sstat_primary.spinfo_state = SCTP_ACTIVE; | |
3426 | ||
1da177e4 LT |
3427 | if (put_user(len, optlen)) { |
3428 | retval = -EFAULT; | |
3429 | goto out; | |
3430 | } | |
3431 | ||
3432 | SCTP_DEBUG_PRINTK("sctp_getsockopt_sctp_status(%d): %d %d %d\n", | |
3433 | len, status.sstat_state, status.sstat_rwnd, | |
3434 | status.sstat_assoc_id); | |
3435 | ||
3436 | if (copy_to_user(optval, &status, len)) { | |
3437 | retval = -EFAULT; | |
3438 | goto out; | |
3439 | } | |
3440 | ||
3441 | out: | |
3442 | return (retval); | |
3443 | } | |
3444 | ||
3445 | ||
3446 | /* 7.2.2 Peer Address Information (SCTP_GET_PEER_ADDR_INFO) | |
3447 | * | |
3448 | * Applications can retrieve information about a specific peer address | |
3449 | * of an association, including its reachability state, congestion | |
3450 | * window, and retransmission timer values. This information is | |
3451 | * read-only. | |
3452 | */ | |
3453 | static int sctp_getsockopt_peer_addr_info(struct sock *sk, int len, | |
3454 | char __user *optval, | |
3455 | int __user *optlen) | |
3456 | { | |
3457 | struct sctp_paddrinfo pinfo; | |
3458 | struct sctp_transport *transport; | |
3459 | int retval = 0; | |
3460 | ||
408f22e8 | 3461 | if (len < sizeof(pinfo)) { |
1da177e4 LT |
3462 | retval = -EINVAL; |
3463 | goto out; | |
3464 | } | |
3465 | ||
408f22e8 NH |
3466 | len = sizeof(pinfo); |
3467 | if (copy_from_user(&pinfo, optval, len)) { | |
1da177e4 LT |
3468 | retval = -EFAULT; |
3469 | goto out; | |
3470 | } | |
3471 | ||
3472 | transport = sctp_addr_id2transport(sk, &pinfo.spinfo_address, | |
3473 | pinfo.spinfo_assoc_id); | |
3474 | if (!transport) | |
3475 | return -EINVAL; | |
3476 | ||
3477 | pinfo.spinfo_assoc_id = sctp_assoc2id(transport->asoc); | |
3f7a87d2 | 3478 | pinfo.spinfo_state = transport->state; |
1da177e4 LT |
3479 | pinfo.spinfo_cwnd = transport->cwnd; |
3480 | pinfo.spinfo_srtt = transport->srtt; | |
3481 | pinfo.spinfo_rto = jiffies_to_msecs(transport->rto); | |
52ccb8e9 | 3482 | pinfo.spinfo_mtu = transport->pathmtu; |
1da177e4 | 3483 | |
3f7a87d2 FF |
3484 | if (pinfo.spinfo_state == SCTP_UNKNOWN) |
3485 | pinfo.spinfo_state = SCTP_ACTIVE; | |
3486 | ||
1da177e4 LT |
3487 | if (put_user(len, optlen)) { |
3488 | retval = -EFAULT; | |
3489 | goto out; | |
3490 | } | |
3491 | ||
3492 | if (copy_to_user(optval, &pinfo, len)) { | |
3493 | retval = -EFAULT; | |
3494 | goto out; | |
3495 | } | |
3496 | ||
3497 | out: | |
3498 | return (retval); | |
3499 | } | |
3500 | ||
3501 | /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS) | |
3502 | * | |
3503 | * This option is a on/off flag. If enabled no SCTP message | |
3504 | * fragmentation will be performed. Instead if a message being sent | |
3505 | * exceeds the current PMTU size, the message will NOT be sent and | |
3506 | * instead a error will be indicated to the user. | |
3507 | */ | |
3508 | static int sctp_getsockopt_disable_fragments(struct sock *sk, int len, | |
3509 | char __user *optval, int __user *optlen) | |
3510 | { | |
3511 | int val; | |
3512 | ||
3513 | if (len < sizeof(int)) | |
3514 | return -EINVAL; | |
3515 | ||
3516 | len = sizeof(int); | |
3517 | val = (sctp_sk(sk)->disable_fragments == 1); | |
3518 | if (put_user(len, optlen)) | |
3519 | return -EFAULT; | |
3520 | if (copy_to_user(optval, &val, len)) | |
3521 | return -EFAULT; | |
3522 | return 0; | |
3523 | } | |
3524 | ||
3525 | /* 7.1.15 Set notification and ancillary events (SCTP_EVENTS) | |
3526 | * | |
3527 | * This socket option is used to specify various notifications and | |
3528 | * ancillary data the user wishes to receive. | |
3529 | */ | |
3530 | static int sctp_getsockopt_events(struct sock *sk, int len, char __user *optval, | |
3531 | int __user *optlen) | |
3532 | { | |
408f22e8 | 3533 | if (len < sizeof(struct sctp_event_subscribe)) |
1da177e4 | 3534 | return -EINVAL; |
408f22e8 NH |
3535 | len = sizeof(struct sctp_event_subscribe); |
3536 | if (put_user(len, optlen)) | |
3537 | return -EFAULT; | |
1da177e4 LT |
3538 | if (copy_to_user(optval, &sctp_sk(sk)->subscribe, len)) |
3539 | return -EFAULT; | |
3540 | return 0; | |
3541 | } | |
3542 | ||
3543 | /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE) | |
3544 | * | |
3545 | * This socket option is applicable to the UDP-style socket only. When | |
3546 | * set it will cause associations that are idle for more than the | |
3547 | * specified number of seconds to automatically close. An association | |
3548 | * being idle is defined an association that has NOT sent or received | |
3549 | * user data. The special value of '0' indicates that no automatic | |
3550 | * close of any associations should be performed. The option expects an | |
3551 | * integer defining the number of seconds of idle time before an | |
3552 | * association is closed. | |
3553 | */ | |
3554 | static int sctp_getsockopt_autoclose(struct sock *sk, int len, char __user *optval, int __user *optlen) | |
3555 | { | |
3556 | /* Applicable to UDP-style socket only */ | |
3557 | if (sctp_style(sk, TCP)) | |
3558 | return -EOPNOTSUPP; | |
408f22e8 | 3559 | if (len < sizeof(int)) |
1da177e4 | 3560 | return -EINVAL; |
408f22e8 NH |
3561 | len = sizeof(int); |
3562 | if (put_user(len, optlen)) | |
3563 | return -EFAULT; | |
3564 | if (copy_to_user(optval, &sctp_sk(sk)->autoclose, sizeof(int))) | |
1da177e4 LT |
3565 | return -EFAULT; |
3566 | return 0; | |
3567 | } | |
3568 | ||
3569 | /* Helper routine to branch off an association to a new socket. */ | |
3570 | SCTP_STATIC int sctp_do_peeloff(struct sctp_association *asoc, | |
3571 | struct socket **sockp) | |
3572 | { | |
3573 | struct sock *sk = asoc->base.sk; | |
3574 | struct socket *sock; | |
4f444308 | 3575 | struct inet_sock *inetsk; |
d570ee49 | 3576 | struct sctp_af *af; |
1da177e4 LT |
3577 | int err = 0; |
3578 | ||
3579 | /* An association cannot be branched off from an already peeled-off | |
3580 | * socket, nor is this supported for tcp style sockets. | |
3581 | */ | |
3582 | if (!sctp_style(sk, UDP)) | |
3583 | return -EINVAL; | |
3584 | ||
3585 | /* Create a new socket. */ | |
3586 | err = sock_create(sk->sk_family, SOCK_SEQPACKET, IPPROTO_SCTP, &sock); | |
3587 | if (err < 0) | |
3588 | return err; | |
3589 | ||
3590 | /* Populate the fields of the newsk from the oldsk and migrate the | |
3591 | * asoc to the newsk. | |
3592 | */ | |
3593 | sctp_sock_migrate(sk, sock->sk, asoc, SCTP_SOCKET_UDP_HIGH_BANDWIDTH); | |
4f444308 VY |
3594 | |
3595 | /* Make peeled-off sockets more like 1-1 accepted sockets. | |
3596 | * Set the daddr and initialize id to something more random | |
3597 | */ | |
d570ee49 VY |
3598 | af = sctp_get_af_specific(asoc->peer.primary_addr.sa.sa_family); |
3599 | af->to_sk_daddr(&asoc->peer.primary_addr, sk); | |
4f444308 | 3600 | inetsk = inet_sk(sock->sk); |
4f444308 VY |
3601 | inetsk->id = asoc->next_tsn ^ jiffies; |
3602 | ||
1da177e4 LT |
3603 | *sockp = sock; |
3604 | ||
3605 | return err; | |
3606 | } | |
3607 | ||
3608 | static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval, int __user *optlen) | |
3609 | { | |
3610 | sctp_peeloff_arg_t peeloff; | |
3611 | struct socket *newsock; | |
3612 | int retval = 0; | |
3613 | struct sctp_association *asoc; | |
3614 | ||
408f22e8 | 3615 | if (len < sizeof(sctp_peeloff_arg_t)) |
1da177e4 | 3616 | return -EINVAL; |
408f22e8 | 3617 | len = sizeof(sctp_peeloff_arg_t); |
1da177e4 LT |
3618 | if (copy_from_user(&peeloff, optval, len)) |
3619 | return -EFAULT; | |
3620 | ||
3621 | asoc = sctp_id2assoc(sk, peeloff.associd); | |
3622 | if (!asoc) { | |
3623 | retval = -EINVAL; | |
3624 | goto out; | |
3625 | } | |
3626 | ||
3627 | SCTP_DEBUG_PRINTK("%s: sk: %p asoc: %p\n", __FUNCTION__, sk, asoc); | |
3628 | ||
3629 | retval = sctp_do_peeloff(asoc, &newsock); | |
3630 | if (retval < 0) | |
3631 | goto out; | |
3632 | ||
3633 | /* Map the socket to an unused fd that can be returned to the user. */ | |
3634 | retval = sock_map_fd(newsock); | |
3635 | if (retval < 0) { | |
3636 | sock_release(newsock); | |
3637 | goto out; | |
3638 | } | |
3639 | ||
3640 | SCTP_DEBUG_PRINTK("%s: sk: %p asoc: %p newsk: %p sd: %d\n", | |
3641 | __FUNCTION__, sk, asoc, newsock->sk, retval); | |
3642 | ||
3643 | /* Return the fd mapped to the new socket. */ | |
3644 | peeloff.sd = retval; | |
408f22e8 NH |
3645 | if (put_user(len, optlen)) |
3646 | return -EFAULT; | |
1da177e4 LT |
3647 | if (copy_to_user(optval, &peeloff, len)) |
3648 | retval = -EFAULT; | |
3649 | ||
3650 | out: | |
3651 | return retval; | |
3652 | } | |
3653 | ||
3654 | /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS) | |
3655 | * | |
3656 | * Applications can enable or disable heartbeats for any peer address of | |
3657 | * an association, modify an address's heartbeat interval, force a | |
3658 | * heartbeat to be sent immediately, and adjust the address's maximum | |
3659 | * number of retransmissions sent before an address is considered | |
3660 | * unreachable. The following structure is used to access and modify an | |
3661 | * address's parameters: | |
3662 | * | |
3663 | * struct sctp_paddrparams { | |
52ccb8e9 FF |
3664 | * sctp_assoc_t spp_assoc_id; |
3665 | * struct sockaddr_storage spp_address; | |
3666 | * uint32_t spp_hbinterval; | |
3667 | * uint16_t spp_pathmaxrxt; | |
3668 | * uint32_t spp_pathmtu; | |
3669 | * uint32_t spp_sackdelay; | |
3670 | * uint32_t spp_flags; | |
3671 | * }; | |
3672 | * | |
3673 | * spp_assoc_id - (one-to-many style socket) This is filled in the | |
3674 | * application, and identifies the association for | |
3675 | * this query. | |
1da177e4 LT |
3676 | * spp_address - This specifies which address is of interest. |
3677 | * spp_hbinterval - This contains the value of the heartbeat interval, | |
52ccb8e9 FF |
3678 | * in milliseconds. If a value of zero |
3679 | * is present in this field then no changes are to | |
3680 | * be made to this parameter. | |
1da177e4 LT |
3681 | * spp_pathmaxrxt - This contains the maximum number of |
3682 | * retransmissions before this address shall be | |
52ccb8e9 FF |
3683 | * considered unreachable. If a value of zero |
3684 | * is present in this field then no changes are to | |
3685 | * be made to this parameter. | |
3686 | * spp_pathmtu - When Path MTU discovery is disabled the value | |
3687 | * specified here will be the "fixed" path mtu. | |
3688 | * Note that if the spp_address field is empty | |
3689 | * then all associations on this address will | |
3690 | * have this fixed path mtu set upon them. | |
3691 | * | |
3692 | * spp_sackdelay - When delayed sack is enabled, this value specifies | |
3693 | * the number of milliseconds that sacks will be delayed | |
3694 | * for. This value will apply to all addresses of an | |
3695 | * association if the spp_address field is empty. Note | |
3696 | * also, that if delayed sack is enabled and this | |
3697 | * value is set to 0, no change is made to the last | |
3698 | * recorded delayed sack timer value. | |
3699 | * | |
3700 | * spp_flags - These flags are used to control various features | |
3701 | * on an association. The flag field may contain | |
3702 | * zero or more of the following options. | |
3703 | * | |
3704 | * SPP_HB_ENABLE - Enable heartbeats on the | |
3705 | * specified address. Note that if the address | |
3706 | * field is empty all addresses for the association | |
3707 | * have heartbeats enabled upon them. | |
3708 | * | |
3709 | * SPP_HB_DISABLE - Disable heartbeats on the | |
3710 | * speicifed address. Note that if the address | |
3711 | * field is empty all addresses for the association | |
3712 | * will have their heartbeats disabled. Note also | |
3713 | * that SPP_HB_ENABLE and SPP_HB_DISABLE are | |
3714 | * mutually exclusive, only one of these two should | |
3715 | * be specified. Enabling both fields will have | |
3716 | * undetermined results. | |
3717 | * | |
3718 | * SPP_HB_DEMAND - Request a user initiated heartbeat | |
3719 | * to be made immediately. | |
3720 | * | |
3721 | * SPP_PMTUD_ENABLE - This field will enable PMTU | |
3722 | * discovery upon the specified address. Note that | |
3723 | * if the address feild is empty then all addresses | |
3724 | * on the association are effected. | |
3725 | * | |
3726 | * SPP_PMTUD_DISABLE - This field will disable PMTU | |
3727 | * discovery upon the specified address. Note that | |
3728 | * if the address feild is empty then all addresses | |
3729 | * on the association are effected. Not also that | |
3730 | * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually | |
3731 | * exclusive. Enabling both will have undetermined | |
3732 | * results. | |
3733 | * | |
3734 | * SPP_SACKDELAY_ENABLE - Setting this flag turns | |
3735 | * on delayed sack. The time specified in spp_sackdelay | |
3736 | * is used to specify the sack delay for this address. Note | |
3737 | * that if spp_address is empty then all addresses will | |
3738 | * enable delayed sack and take on the sack delay | |
3739 | * value specified in spp_sackdelay. | |
3740 | * SPP_SACKDELAY_DISABLE - Setting this flag turns | |
3741 | * off delayed sack. If the spp_address field is blank then | |
3742 | * delayed sack is disabled for the entire association. Note | |
3743 | * also that this field is mutually exclusive to | |
3744 | * SPP_SACKDELAY_ENABLE, setting both will have undefined | |
3745 | * results. | |
1da177e4 LT |
3746 | */ |
3747 | static int sctp_getsockopt_peer_addr_params(struct sock *sk, int len, | |
52ccb8e9 | 3748 | char __user *optval, int __user *optlen) |
1da177e4 | 3749 | { |
52ccb8e9 FF |
3750 | struct sctp_paddrparams params; |
3751 | struct sctp_transport *trans = NULL; | |
3752 | struct sctp_association *asoc = NULL; | |
3753 | struct sctp_sock *sp = sctp_sk(sk); | |
1da177e4 | 3754 | |
408f22e8 | 3755 | if (len < sizeof(struct sctp_paddrparams)) |
1da177e4 | 3756 | return -EINVAL; |
408f22e8 | 3757 | len = sizeof(struct sctp_paddrparams); |
1da177e4 LT |
3758 | if (copy_from_user(¶ms, optval, len)) |
3759 | return -EFAULT; | |
3760 | ||
52ccb8e9 FF |
3761 | /* If an address other than INADDR_ANY is specified, and |
3762 | * no transport is found, then the request is invalid. | |
1da177e4 | 3763 | */ |
52ccb8e9 FF |
3764 | if (!sctp_is_any(( union sctp_addr *)¶ms.spp_address)) { |
3765 | trans = sctp_addr_id2transport(sk, ¶ms.spp_address, | |
3766 | params.spp_assoc_id); | |
3767 | if (!trans) { | |
3768 | SCTP_DEBUG_PRINTK("Failed no transport\n"); | |
3769 | return -EINVAL; | |
3770 | } | |
1da177e4 LT |
3771 | } |
3772 | ||
52ccb8e9 FF |
3773 | /* Get association, if assoc_id != 0 and the socket is a one |
3774 | * to many style socket, and an association was not found, then | |
3775 | * the id was invalid. | |
3776 | */ | |
3777 | asoc = sctp_id2assoc(sk, params.spp_assoc_id); | |
3778 | if (!asoc && params.spp_assoc_id && sctp_style(sk, UDP)) { | |
3779 | SCTP_DEBUG_PRINTK("Failed no association\n"); | |
1da177e4 | 3780 | return -EINVAL; |
52ccb8e9 | 3781 | } |
1da177e4 | 3782 | |
52ccb8e9 FF |
3783 | if (trans) { |
3784 | /* Fetch transport values. */ | |
3785 | params.spp_hbinterval = jiffies_to_msecs(trans->hbinterval); | |
3786 | params.spp_pathmtu = trans->pathmtu; | |
3787 | params.spp_pathmaxrxt = trans->pathmaxrxt; | |
3788 | params.spp_sackdelay = jiffies_to_msecs(trans->sackdelay); | |
3789 | ||
3790 | /*draft-11 doesn't say what to return in spp_flags*/ | |
3791 | params.spp_flags = trans->param_flags; | |
3792 | } else if (asoc) { | |
3793 | /* Fetch association values. */ | |
3794 | params.spp_hbinterval = jiffies_to_msecs(asoc->hbinterval); | |
3795 | params.spp_pathmtu = asoc->pathmtu; | |
3796 | params.spp_pathmaxrxt = asoc->pathmaxrxt; | |
3797 | params.spp_sackdelay = jiffies_to_msecs(asoc->sackdelay); | |
3798 | ||
3799 | /*draft-11 doesn't say what to return in spp_flags*/ | |
3800 | params.spp_flags = asoc->param_flags; | |
3801 | } else { | |
3802 | /* Fetch socket values. */ | |
3803 | params.spp_hbinterval = sp->hbinterval; | |
3804 | params.spp_pathmtu = sp->pathmtu; | |
3805 | params.spp_sackdelay = sp->sackdelay; | |
3806 | params.spp_pathmaxrxt = sp->pathmaxrxt; | |
1da177e4 | 3807 | |
52ccb8e9 FF |
3808 | /*draft-11 doesn't say what to return in spp_flags*/ |
3809 | params.spp_flags = sp->param_flags; | |
3810 | } | |
1da177e4 | 3811 | |
1da177e4 LT |
3812 | if (copy_to_user(optval, ¶ms, len)) |
3813 | return -EFAULT; | |
3814 | ||
3815 | if (put_user(len, optlen)) | |
3816 | return -EFAULT; | |
3817 | ||
3818 | return 0; | |
3819 | } | |
3820 | ||
b6e1331f | 3821 | /* 7.1.23. Delayed Ack Timer (SCTP_DELAYED_ACK_TIME) |
7708610b FF |
3822 | * |
3823 | * This options will get or set the delayed ack timer. The time is set | |
3824 | * in milliseconds. If the assoc_id is 0, then this sets or gets the | |
3825 | * endpoints default delayed ack timer value. If the assoc_id field is | |
3826 | * non-zero, then the set or get effects the specified association. | |
3827 | * | |
3828 | * struct sctp_assoc_value { | |
3829 | * sctp_assoc_t assoc_id; | |
3830 | * uint32_t assoc_value; | |
3831 | * }; | |
3832 | * | |
3833 | * assoc_id - This parameter, indicates which association the | |
3834 | * user is preforming an action upon. Note that if | |
3835 | * this field's value is zero then the endpoints | |
3836 | * default value is changed (effecting future | |
3837 | * associations only). | |
3838 | * | |
3839 | * assoc_value - This parameter contains the number of milliseconds | |
3840 | * that the user is requesting the delayed ACK timer | |
3841 | * be set to. Note that this value is defined in | |
3842 | * the standard to be between 200 and 500 milliseconds. | |
3843 | * | |
3844 | * Note: a value of zero will leave the value alone, | |
3845 | * but disable SACK delay. A non-zero value will also | |
3846 | * enable SACK delay. | |
3847 | */ | |
3848 | static int sctp_getsockopt_delayed_ack_time(struct sock *sk, int len, | |
3849 | char __user *optval, | |
3850 | int __user *optlen) | |
3851 | { | |
3852 | struct sctp_assoc_value params; | |
3853 | struct sctp_association *asoc = NULL; | |
3854 | struct sctp_sock *sp = sctp_sk(sk); | |
3855 | ||
408f22e8 | 3856 | if (len < sizeof(struct sctp_assoc_value)) |
7708610b FF |
3857 | return - EINVAL; |
3858 | ||
408f22e8 NH |
3859 | len = sizeof(struct sctp_assoc_value); |
3860 | ||
7708610b FF |
3861 | if (copy_from_user(¶ms, optval, len)) |
3862 | return -EFAULT; | |
3863 | ||
3864 | /* Get association, if assoc_id != 0 and the socket is a one | |
3865 | * to many style socket, and an association was not found, then | |
3866 | * the id was invalid. | |
d808ad9a | 3867 | */ |
7708610b FF |
3868 | asoc = sctp_id2assoc(sk, params.assoc_id); |
3869 | if (!asoc && params.assoc_id && sctp_style(sk, UDP)) | |
3870 | return -EINVAL; | |
3871 | ||
3872 | if (asoc) { | |
3873 | /* Fetch association values. */ | |
3874 | if (asoc->param_flags & SPP_SACKDELAY_ENABLE) | |
3875 | params.assoc_value = jiffies_to_msecs( | |
3876 | asoc->sackdelay); | |
3877 | else | |
3878 | params.assoc_value = 0; | |
3879 | } else { | |
3880 | /* Fetch socket values. */ | |
3881 | if (sp->param_flags & SPP_SACKDELAY_ENABLE) | |
3882 | params.assoc_value = sp->sackdelay; | |
3883 | else | |
3884 | params.assoc_value = 0; | |
3885 | } | |
3886 | ||
3887 | if (copy_to_user(optval, ¶ms, len)) | |
3888 | return -EFAULT; | |
3889 | ||
3890 | if (put_user(len, optlen)) | |
3891 | return -EFAULT; | |
3892 | ||
3893 | return 0; | |
3894 | } | |
3895 | ||
1da177e4 LT |
3896 | /* 7.1.3 Initialization Parameters (SCTP_INITMSG) |
3897 | * | |
3898 | * Applications can specify protocol parameters for the default association | |
3899 | * initialization. The option name argument to setsockopt() and getsockopt() | |
3900 | * is SCTP_INITMSG. | |
3901 | * | |
3902 | * Setting initialization parameters is effective only on an unconnected | |
3903 | * socket (for UDP-style sockets only future associations are effected | |
3904 | * by the change). With TCP-style sockets, this option is inherited by | |
3905 | * sockets derived from a listener socket. | |
3906 | */ | |
3907 | static int sctp_getsockopt_initmsg(struct sock *sk, int len, char __user *optval, int __user *optlen) | |
3908 | { | |
408f22e8 | 3909 | if (len < sizeof(struct sctp_initmsg)) |
1da177e4 | 3910 | return -EINVAL; |
408f22e8 NH |
3911 | len = sizeof(struct sctp_initmsg); |
3912 | if (put_user(len, optlen)) | |
3913 | return -EFAULT; | |
1da177e4 LT |
3914 | if (copy_to_user(optval, &sctp_sk(sk)->initmsg, len)) |
3915 | return -EFAULT; | |
3916 | return 0; | |
3917 | } | |
3918 | ||