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47505b8b | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
60c778b2 | 2 | /* SCTP kernel implementation |
1da177e4 LT |
3 | * (C) Copyright IBM Corp. 2001, 2004 |
4 | * Copyright (c) 1999-2000 Cisco, Inc. | |
5 | * Copyright (c) 1999-2001 Motorola, Inc. | |
6 | * Copyright (c) 2001-2003 Intel Corp. | |
7 | * Copyright (c) 2001-2002 Nokia, Inc. | |
8 | * Copyright (c) 2001 La Monte H.P. Yarroll | |
9 | * | |
60c778b2 | 10 | * This file is part of the SCTP kernel implementation |
1da177e4 LT |
11 | * |
12 | * These functions interface with the sockets layer to implement the | |
13 | * SCTP Extensions for the Sockets API. | |
14 | * | |
15 | * Note that the descriptions from the specification are USER level | |
16 | * functions--this file is the functions which populate the struct proto | |
17 | * for SCTP which is the BOTTOM of the sockets interface. | |
18 | * | |
1da177e4 LT |
19 | * Please send any bug reports or fixes you make to the |
20 | * email address(es): | |
91705c61 | 21 | * lksctp developers <linux-sctp@vger.kernel.org> |
1da177e4 | 22 | * |
1da177e4 LT |
23 | * Written or modified by: |
24 | * La Monte H.P. Yarroll <piggy@acm.org> | |
25 | * Narasimha Budihal <narsi@refcode.org> | |
26 | * Karl Knutson <karl@athena.chicago.il.us> | |
27 | * Jon Grimm <jgrimm@us.ibm.com> | |
28 | * Xingang Guo <xingang.guo@intel.com> | |
29 | * Daisy Chang <daisyc@us.ibm.com> | |
30 | * Sridhar Samudrala <samudrala@us.ibm.com> | |
31 | * Inaky Perez-Gonzalez <inaky.gonzalez@intel.com> | |
32 | * Ardelle Fan <ardelle.fan@intel.com> | |
33 | * Ryan Layer <rmlayer@us.ibm.com> | |
34 | * Anup Pemmaiah <pemmaiah@cc.usu.edu> | |
35 | * Kevin Gao <kevin.gao@intel.com> | |
1da177e4 LT |
36 | */ |
37 | ||
145ce502 JP |
38 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
39 | ||
5821c769 | 40 | #include <crypto/hash.h> |
1da177e4 LT |
41 | #include <linux/types.h> |
42 | #include <linux/kernel.h> | |
43 | #include <linux/wait.h> | |
44 | #include <linux/time.h> | |
3f07c014 | 45 | #include <linux/sched/signal.h> |
1da177e4 | 46 | #include <linux/ip.h> |
4fc268d2 | 47 | #include <linux/capability.h> |
1da177e4 LT |
48 | #include <linux/fcntl.h> |
49 | #include <linux/poll.h> | |
50 | #include <linux/init.h> | |
5a0e3ad6 | 51 | #include <linux/slab.h> |
56b31d1c | 52 | #include <linux/file.h> |
ffd59393 | 53 | #include <linux/compat.h> |
0eb71a9d | 54 | #include <linux/rhashtable.h> |
1da177e4 LT |
55 | |
56 | #include <net/ip.h> | |
57 | #include <net/icmp.h> | |
58 | #include <net/route.h> | |
59 | #include <net/ipv6.h> | |
60 | #include <net/inet_common.h> | |
8465a5fc | 61 | #include <net/busy_poll.h> |
1da177e4 LT |
62 | |
63 | #include <linux/socket.h> /* for sa_family_t */ | |
bc3b2d7f | 64 | #include <linux/export.h> |
1da177e4 LT |
65 | #include <net/sock.h> |
66 | #include <net/sctp/sctp.h> | |
67 | #include <net/sctp/sm.h> | |
13aa8770 | 68 | #include <net/sctp/stream_sched.h> |
1da177e4 | 69 | |
1da177e4 | 70 | /* Forward declarations for internal helper functions. */ |
cd305c74 | 71 | static bool sctp_writeable(struct sock *sk); |
1da177e4 | 72 | static void sctp_wfree(struct sk_buff *skb); |
cea0cc80 | 73 | static int sctp_wait_for_sndbuf(struct sctp_association *asoc, long *timeo_p, |
a0ff6600 | 74 | size_t msg_len); |
26ac8e5f | 75 | static int sctp_wait_for_packet(struct sock *sk, int *err, long *timeo_p); |
1da177e4 LT |
76 | static int sctp_wait_for_connect(struct sctp_association *, long *timeo_p); |
77 | static int sctp_wait_for_accept(struct sock *sk, long timeo); | |
78 | static void sctp_wait_for_close(struct sock *sk, long timeo); | |
0a2fbac1 | 79 | static void sctp_destruct_sock(struct sock *sk); |
1da177e4 LT |
80 | static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt, |
81 | union sctp_addr *addr, int len); | |
82 | static int sctp_bindx_add(struct sock *, struct sockaddr *, int); | |
83 | static int sctp_bindx_rem(struct sock *, struct sockaddr *, int); | |
84 | static int sctp_send_asconf_add_ip(struct sock *, struct sockaddr *, int); | |
85 | static int sctp_send_asconf_del_ip(struct sock *, struct sockaddr *, int); | |
86 | static int sctp_send_asconf(struct sctp_association *asoc, | |
87 | struct sctp_chunk *chunk); | |
88 | static int sctp_do_bind(struct sock *, union sctp_addr *, int); | |
89 | static int sctp_autobind(struct sock *sk); | |
89664c62 XL |
90 | static int sctp_sock_migrate(struct sock *oldsk, struct sock *newsk, |
91 | struct sctp_association *assoc, | |
92 | enum sctp_socket_type type); | |
1da177e4 | 93 | |
06044751 | 94 | static unsigned long sctp_memory_pressure; |
8d987e5c | 95 | static atomic_long_t sctp_memory_allocated; |
1748376b | 96 | struct percpu_counter sctp_sockets_allocated; |
4d93df0a | 97 | |
5c52ba17 | 98 | static void sctp_enter_memory_pressure(struct sock *sk) |
4d93df0a NH |
99 | { |
100 | sctp_memory_pressure = 1; | |
101 | } | |
102 | ||
103 | ||
1da177e4 LT |
104 | /* Get the sndbuf space available at the time on the association. */ |
105 | static inline int sctp_wspace(struct sctp_association *asoc) | |
106 | { | |
cd305c74 | 107 | struct sock *sk = asoc->base.sk; |
1da177e4 | 108 | |
cd305c74 XL |
109 | return asoc->ep->sndbuf_policy ? sk->sk_sndbuf - asoc->sndbuf_used |
110 | : sk_stream_wspace(sk); | |
1da177e4 LT |
111 | } |
112 | ||
113 | /* Increment the used sndbuf space count of the corresponding association by | |
114 | * the size of the outgoing data chunk. | |
115 | * Also, set the skb destructor for sndbuf accounting later. | |
116 | * | |
117 | * Since it is always 1-1 between chunk and skb, and also a new skb is always | |
118 | * allocated for chunk bundling in sctp_packet_transmit(), we can use the | |
119 | * destructor in the data chunk skb for the purpose of the sndbuf space | |
120 | * tracking. | |
121 | */ | |
122 | static inline void sctp_set_owner_w(struct sctp_chunk *chunk) | |
123 | { | |
124 | struct sctp_association *asoc = chunk->asoc; | |
125 | struct sock *sk = asoc->base.sk; | |
126 | ||
127 | /* The sndbuf space is tracked per association. */ | |
128 | sctp_association_hold(asoc); | |
129 | ||
1b1e0bc9 XL |
130 | if (chunk->shkey) |
131 | sctp_auth_shkey_hold(chunk->shkey); | |
132 | ||
4eb701df NH |
133 | skb_set_owner_w(chunk->skb, sk); |
134 | ||
1da177e4 LT |
135 | chunk->skb->destructor = sctp_wfree; |
136 | /* Save the chunk pointer in skb for sctp_wfree to use later. */ | |
f869c912 | 137 | skb_shinfo(chunk->skb)->destructor_arg = chunk; |
1da177e4 | 138 | |
14afee4b | 139 | refcount_add(sizeof(struct sctp_chunk), &sk->sk_wmem_alloc); |
605c0ac1 XL |
140 | asoc->sndbuf_used += chunk->skb->truesize + sizeof(struct sctp_chunk); |
141 | sk->sk_wmem_queued += chunk->skb->truesize + sizeof(struct sctp_chunk); | |
3ab224be | 142 | sk_mem_charge(sk, chunk->skb->truesize); |
1da177e4 LT |
143 | } |
144 | ||
d04adf1b XL |
145 | static void sctp_clear_owner_w(struct sctp_chunk *chunk) |
146 | { | |
147 | skb_orphan(chunk->skb); | |
148 | } | |
149 | ||
5c3e82fe QH |
150 | #define traverse_and_process() \ |
151 | do { \ | |
152 | msg = chunk->msg; \ | |
153 | if (msg == prev_msg) \ | |
154 | continue; \ | |
155 | list_for_each_entry(c, &msg->chunks, frag_list) { \ | |
156 | if ((clear && asoc->base.sk == c->skb->sk) || \ | |
157 | (!clear && asoc->base.sk != c->skb->sk)) \ | |
158 | cb(c); \ | |
159 | } \ | |
160 | prev_msg = msg; \ | |
161 | } while (0) | |
162 | ||
d04adf1b | 163 | static void sctp_for_each_tx_datachunk(struct sctp_association *asoc, |
5c3e82fe | 164 | bool clear, |
d04adf1b XL |
165 | void (*cb)(struct sctp_chunk *)) |
166 | ||
167 | { | |
5c3e82fe | 168 | struct sctp_datamsg *msg, *prev_msg = NULL; |
d04adf1b | 169 | struct sctp_outq *q = &asoc->outqueue; |
5c3e82fe | 170 | struct sctp_chunk *chunk, *c; |
d04adf1b | 171 | struct sctp_transport *t; |
d04adf1b XL |
172 | |
173 | list_for_each_entry(t, &asoc->peer.transport_addr_list, transports) | |
174 | list_for_each_entry(chunk, &t->transmitted, transmitted_list) | |
5c3e82fe | 175 | traverse_and_process(); |
d04adf1b | 176 | |
a8dd3979 | 177 | list_for_each_entry(chunk, &q->retransmit, transmitted_list) |
5c3e82fe | 178 | traverse_and_process(); |
d04adf1b | 179 | |
a8dd3979 | 180 | list_for_each_entry(chunk, &q->sacked, transmitted_list) |
5c3e82fe | 181 | traverse_and_process(); |
d04adf1b | 182 | |
a8dd3979 | 183 | list_for_each_entry(chunk, &q->abandoned, transmitted_list) |
5c3e82fe | 184 | traverse_and_process(); |
d04adf1b XL |
185 | |
186 | list_for_each_entry(chunk, &q->out_chunk_list, list) | |
5c3e82fe | 187 | traverse_and_process(); |
d04adf1b XL |
188 | } |
189 | ||
13228238 XL |
190 | static void sctp_for_each_rx_skb(struct sctp_association *asoc, struct sock *sk, |
191 | void (*cb)(struct sk_buff *, struct sock *)) | |
192 | ||
193 | { | |
194 | struct sk_buff *skb, *tmp; | |
195 | ||
196 | sctp_skb_for_each(skb, &asoc->ulpq.lobby, tmp) | |
197 | cb(skb, sk); | |
198 | ||
199 | sctp_skb_for_each(skb, &asoc->ulpq.reasm, tmp) | |
200 | cb(skb, sk); | |
201 | ||
202 | sctp_skb_for_each(skb, &asoc->ulpq.reasm_uo, tmp) | |
203 | cb(skb, sk); | |
204 | } | |
205 | ||
1da177e4 LT |
206 | /* Verify that this is a valid address. */ |
207 | static inline int sctp_verify_addr(struct sock *sk, union sctp_addr *addr, | |
208 | int len) | |
209 | { | |
210 | struct sctp_af *af; | |
211 | ||
212 | /* Verify basic sockaddr. */ | |
213 | af = sctp_sockaddr_af(sctp_sk(sk), addr, len); | |
214 | if (!af) | |
215 | return -EINVAL; | |
216 | ||
217 | /* Is this a valid SCTP address? */ | |
5636bef7 | 218 | if (!af->addr_valid(addr, sctp_sk(sk), NULL)) |
1da177e4 LT |
219 | return -EINVAL; |
220 | ||
221 | if (!sctp_sk(sk)->pf->send_verify(sctp_sk(sk), (addr))) | |
222 | return -EINVAL; | |
223 | ||
224 | return 0; | |
225 | } | |
226 | ||
227 | /* Look up the association by its id. If this is not a UDP-style | |
228 | * socket, the ID field is always ignored. | |
229 | */ | |
230 | struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id) | |
231 | { | |
232 | struct sctp_association *asoc = NULL; | |
233 | ||
234 | /* If this is not a UDP-style socket, assoc id should be ignored. */ | |
235 | if (!sctp_style(sk, UDP)) { | |
236 | /* Return NULL if the socket state is not ESTABLISHED. It | |
237 | * could be a TCP-style listening socket or a socket which | |
238 | * hasn't yet called connect() to establish an association. | |
239 | */ | |
e5b13f34 | 240 | if (!sctp_sstate(sk, ESTABLISHED) && !sctp_sstate(sk, CLOSING)) |
1da177e4 LT |
241 | return NULL; |
242 | ||
243 | /* Get the first and the only association from the list. */ | |
244 | if (!list_empty(&sctp_sk(sk)->ep->asocs)) | |
245 | asoc = list_entry(sctp_sk(sk)->ep->asocs.next, | |
246 | struct sctp_association, asocs); | |
247 | return asoc; | |
248 | } | |
249 | ||
250 | /* Otherwise this is a UDP-style socket. */ | |
80df2704 | 251 | if (id <= SCTP_ALL_ASSOC) |
1da177e4 LT |
252 | return NULL; |
253 | ||
254 | spin_lock_bh(&sctp_assocs_id_lock); | |
255 | asoc = (struct sctp_association *)idr_find(&sctp_assocs_id, (int)id); | |
b336deca MRL |
256 | if (asoc && (asoc->base.sk != sk || asoc->base.dead)) |
257 | asoc = NULL; | |
1da177e4 LT |
258 | spin_unlock_bh(&sctp_assocs_id_lock); |
259 | ||
1da177e4 LT |
260 | return asoc; |
261 | } | |
262 | ||
263 | /* Look up the transport from an address and an assoc id. If both address and | |
264 | * id are specified, the associations matching the address and the id should be | |
265 | * the same. | |
266 | */ | |
267 | static struct sctp_transport *sctp_addr_id2transport(struct sock *sk, | |
268 | struct sockaddr_storage *addr, | |
269 | sctp_assoc_t id) | |
270 | { | |
271 | struct sctp_association *addr_asoc = NULL, *id_asoc = NULL; | |
6f29a130 | 272 | struct sctp_af *af = sctp_get_af_specific(addr->ss_family); |
1da177e4 | 273 | union sctp_addr *laddr = (union sctp_addr *)addr; |
6f29a130 XL |
274 | struct sctp_transport *transport; |
275 | ||
912964ea | 276 | if (!af || sctp_verify_addr(sk, laddr, af->sockaddr_len)) |
6f29a130 | 277 | return NULL; |
1da177e4 | 278 | |
1da177e4 | 279 | addr_asoc = sctp_endpoint_lookup_assoc(sctp_sk(sk)->ep, |
cd4ff034 | 280 | laddr, |
1da177e4 | 281 | &transport); |
1da177e4 LT |
282 | |
283 | if (!addr_asoc) | |
284 | return NULL; | |
285 | ||
286 | id_asoc = sctp_id2assoc(sk, id); | |
287 | if (id_asoc && (id_asoc != addr_asoc)) | |
288 | return NULL; | |
289 | ||
299ee123 | 290 | sctp_get_pf_specific(sk->sk_family)->addr_to_user(sctp_sk(sk), |
1da177e4 LT |
291 | (union sctp_addr *)addr); |
292 | ||
293 | return transport; | |
294 | } | |
295 | ||
296 | /* API 3.1.2 bind() - UDP Style Syntax | |
297 | * The syntax of bind() is, | |
298 | * | |
299 | * ret = bind(int sd, struct sockaddr *addr, int addrlen); | |
300 | * | |
301 | * sd - the socket descriptor returned by socket(). | |
302 | * addr - the address structure (struct sockaddr_in or struct | |
303 | * sockaddr_in6 [RFC 2553]), | |
304 | * addr_len - the size of the address structure. | |
305 | */ | |
dda91928 | 306 | static int sctp_bind(struct sock *sk, struct sockaddr *addr, int addr_len) |
1da177e4 LT |
307 | { |
308 | int retval = 0; | |
309 | ||
048ed4b6 | 310 | lock_sock(sk); |
1da177e4 | 311 | |
bb33381d DB |
312 | pr_debug("%s: sk:%p, addr:%p, addr_len:%d\n", __func__, sk, |
313 | addr, addr_len); | |
1da177e4 LT |
314 | |
315 | /* Disallow binding twice. */ | |
316 | if (!sctp_sk(sk)->ep->base.bind_addr.port) | |
3f7a87d2 | 317 | retval = sctp_do_bind(sk, (union sctp_addr *)addr, |
1da177e4 LT |
318 | addr_len); |
319 | else | |
320 | retval = -EINVAL; | |
321 | ||
048ed4b6 | 322 | release_sock(sk); |
1da177e4 LT |
323 | |
324 | return retval; | |
325 | } | |
326 | ||
8e2ef6ab | 327 | static int sctp_get_port_local(struct sock *, union sctp_addr *); |
1da177e4 LT |
328 | |
329 | /* Verify this is a valid sockaddr. */ | |
330 | static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt, | |
331 | union sctp_addr *addr, int len) | |
332 | { | |
333 | struct sctp_af *af; | |
334 | ||
335 | /* Check minimum size. */ | |
336 | if (len < sizeof (struct sockaddr)) | |
337 | return NULL; | |
338 | ||
c5006b8a XL |
339 | if (!opt->pf->af_supported(addr->sa.sa_family, opt)) |
340 | return NULL; | |
341 | ||
81e98370 ED |
342 | if (addr->sa.sa_family == AF_INET6) { |
343 | if (len < SIN6_LEN_RFC2133) | |
344 | return NULL; | |
345 | /* V4 mapped address are really of AF_INET family */ | |
346 | if (ipv6_addr_v4mapped(&addr->v6.sin6_addr) && | |
347 | !opt->pf->af_supported(AF_INET, opt)) | |
348 | return NULL; | |
349 | } | |
1da177e4 LT |
350 | |
351 | /* If we get this far, af is valid. */ | |
352 | af = sctp_get_af_specific(addr->sa.sa_family); | |
353 | ||
354 | if (len < af->sockaddr_len) | |
355 | return NULL; | |
356 | ||
357 | return af; | |
358 | } | |
359 | ||
360 | /* Bind a local address either to an endpoint or to an association. */ | |
dda91928 | 361 | static int sctp_do_bind(struct sock *sk, union sctp_addr *addr, int len) |
1da177e4 | 362 | { |
3594698a | 363 | struct net *net = sock_net(sk); |
1da177e4 LT |
364 | struct sctp_sock *sp = sctp_sk(sk); |
365 | struct sctp_endpoint *ep = sp->ep; | |
366 | struct sctp_bind_addr *bp = &ep->base.bind_addr; | |
367 | struct sctp_af *af; | |
368 | unsigned short snum; | |
369 | int ret = 0; | |
370 | ||
1da177e4 LT |
371 | /* Common sockaddr verification. */ |
372 | af = sctp_sockaddr_af(sp, addr, len); | |
3f7a87d2 | 373 | if (!af) { |
bb33381d DB |
374 | pr_debug("%s: sk:%p, newaddr:%p, len:%d EINVAL\n", |
375 | __func__, sk, addr, len); | |
1da177e4 | 376 | return -EINVAL; |
3f7a87d2 FF |
377 | } |
378 | ||
379 | snum = ntohs(addr->v4.sin_port); | |
380 | ||
bb33381d DB |
381 | pr_debug("%s: sk:%p, new addr:%pISc, port:%d, new port:%d, len:%d\n", |
382 | __func__, sk, &addr->sa, bp->port, snum, len); | |
1da177e4 LT |
383 | |
384 | /* PF specific bind() address verification. */ | |
385 | if (!sp->pf->bind_verify(sp, addr)) | |
386 | return -EADDRNOTAVAIL; | |
387 | ||
8b358056 VY |
388 | /* We must either be unbound, or bind to the same port. |
389 | * It's OK to allow 0 ports if we are already bound. | |
390 | * We'll just inhert an already bound port in this case | |
391 | */ | |
392 | if (bp->port) { | |
393 | if (!snum) | |
394 | snum = bp->port; | |
395 | else if (snum != bp->port) { | |
bb33381d DB |
396 | pr_debug("%s: new port %d doesn't match existing port " |
397 | "%d\n", __func__, snum, bp->port); | |
8b358056 VY |
398 | return -EINVAL; |
399 | } | |
1da177e4 LT |
400 | } |
401 | ||
82f31ebf | 402 | if (snum && inet_port_requires_bind_service(net, snum) && |
3594698a | 403 | !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE)) |
1da177e4 LT |
404 | return -EACCES; |
405 | ||
4e54064e VY |
406 | /* See if the address matches any of the addresses we may have |
407 | * already bound before checking against other endpoints. | |
408 | */ | |
409 | if (sctp_bind_addr_match(bp, addr, sp)) | |
410 | return -EINVAL; | |
411 | ||
1da177e4 LT |
412 | /* Make sure we are allowed to bind here. |
413 | * The function sctp_get_port_local() does duplicate address | |
414 | * detection. | |
415 | */ | |
2772b495 | 416 | addr->v4.sin_port = htons(snum); |
e0e4b8de | 417 | if (sctp_get_port_local(sk, addr)) |
4e54064e | 418 | return -EADDRINUSE; |
1da177e4 LT |
419 | |
420 | /* Refresh ephemeral port. */ | |
421 | if (!bp->port) | |
c720c7e8 | 422 | bp->port = inet_sk(sk)->inet_num; |
1da177e4 | 423 | |
559cf710 VY |
424 | /* Add the address to the bind address list. |
425 | * Use GFP_ATOMIC since BHs will be disabled. | |
426 | */ | |
133800d1 MRL |
427 | ret = sctp_add_bind_addr(bp, addr, af->sockaddr_len, |
428 | SCTP_ADDR_SRC, GFP_ATOMIC); | |
1da177e4 | 429 | |
29b99f54 MW |
430 | if (ret) { |
431 | sctp_put_port(sk); | |
432 | return ret; | |
1da177e4 | 433 | } |
29b99f54 MW |
434 | /* Copy back into socket for getsockname() use. */ |
435 | inet_sk(sk)->inet_sport = htons(inet_sk(sk)->inet_num); | |
436 | sp->pf->to_sk_saddr(addr, sk); | |
1da177e4 LT |
437 | |
438 | return ret; | |
439 | } | |
440 | ||
441 | /* ADDIP Section 4.1.1 Congestion Control of ASCONF Chunks | |
442 | * | |
d808ad9a | 443 | * R1) One and only one ASCONF Chunk MAY be in transit and unacknowledged |
1da177e4 | 444 | * at any one time. If a sender, after sending an ASCONF chunk, decides |
d808ad9a | 445 | * it needs to transfer another ASCONF Chunk, it MUST wait until the |
1da177e4 | 446 | * ASCONF-ACK Chunk returns from the previous ASCONF Chunk before sending a |
d808ad9a YH |
447 | * subsequent ASCONF. Note this restriction binds each side, so at any |
448 | * time two ASCONF may be in-transit on any given association (one sent | |
1da177e4 LT |
449 | * from each endpoint). |
450 | */ | |
451 | static int sctp_send_asconf(struct sctp_association *asoc, | |
452 | struct sctp_chunk *chunk) | |
453 | { | |
4e7696d9 | 454 | int retval = 0; |
1da177e4 LT |
455 | |
456 | /* If there is an outstanding ASCONF chunk, queue it for later | |
457 | * transmission. | |
d808ad9a | 458 | */ |
1da177e4 | 459 | if (asoc->addip_last_asconf) { |
79af02c2 | 460 | list_add_tail(&chunk->list, &asoc->addip_chunk_list); |
d808ad9a | 461 | goto out; |
1da177e4 LT |
462 | } |
463 | ||
464 | /* Hold the chunk until an ASCONF_ACK is received. */ | |
465 | sctp_chunk_hold(chunk); | |
4e7696d9 | 466 | retval = sctp_primitive_ASCONF(asoc->base.net, asoc, chunk); |
1da177e4 LT |
467 | if (retval) |
468 | sctp_chunk_free(chunk); | |
469 | else | |
470 | asoc->addip_last_asconf = chunk; | |
471 | ||
472 | out: | |
473 | return retval; | |
474 | } | |
475 | ||
476 | /* Add a list of addresses as bind addresses to local endpoint or | |
477 | * association. | |
478 | * | |
479 | * Basically run through each address specified in the addrs/addrcnt | |
480 | * array/length pair, determine if it is IPv6 or IPv4 and call | |
481 | * sctp_do_bind() on it. | |
482 | * | |
483 | * If any of them fails, then the operation will be reversed and the | |
484 | * ones that were added will be removed. | |
485 | * | |
486 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
487 | */ | |
04675210 | 488 | static int sctp_bindx_add(struct sock *sk, struct sockaddr *addrs, int addrcnt) |
1da177e4 LT |
489 | { |
490 | int cnt; | |
491 | int retval = 0; | |
492 | void *addr_buf; | |
493 | struct sockaddr *sa_addr; | |
494 | struct sctp_af *af; | |
495 | ||
bb33381d DB |
496 | pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", __func__, sk, |
497 | addrs, addrcnt); | |
1da177e4 LT |
498 | |
499 | addr_buf = addrs; | |
500 | for (cnt = 0; cnt < addrcnt; cnt++) { | |
501 | /* The list may contain either IPv4 or IPv6 address; | |
502 | * determine the address length for walking thru the list. | |
503 | */ | |
ea110733 | 504 | sa_addr = addr_buf; |
1da177e4 LT |
505 | af = sctp_get_af_specific(sa_addr->sa_family); |
506 | if (!af) { | |
507 | retval = -EINVAL; | |
508 | goto err_bindx_add; | |
509 | } | |
510 | ||
d808ad9a | 511 | retval = sctp_do_bind(sk, (union sctp_addr *)sa_addr, |
1da177e4 LT |
512 | af->sockaddr_len); |
513 | ||
514 | addr_buf += af->sockaddr_len; | |
515 | ||
516 | err_bindx_add: | |
517 | if (retval < 0) { | |
518 | /* Failed. Cleanup the ones that have been added */ | |
519 | if (cnt > 0) | |
520 | sctp_bindx_rem(sk, addrs, cnt); | |
521 | return retval; | |
522 | } | |
523 | } | |
524 | ||
525 | return retval; | |
526 | } | |
527 | ||
528 | /* Send an ASCONF chunk with Add IP address parameters to all the peers of the | |
529 | * associations that are part of the endpoint indicating that a list of local | |
530 | * addresses are added to the endpoint. | |
531 | * | |
d808ad9a | 532 | * If any of the addresses is already in the bind address list of the |
1da177e4 LT |
533 | * association, we do not send the chunk for that association. But it will not |
534 | * affect other associations. | |
535 | * | |
536 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
537 | */ | |
d808ad9a | 538 | static int sctp_send_asconf_add_ip(struct sock *sk, |
1da177e4 LT |
539 | struct sockaddr *addrs, |
540 | int addrcnt) | |
541 | { | |
542 | struct sctp_sock *sp; | |
543 | struct sctp_endpoint *ep; | |
544 | struct sctp_association *asoc; | |
545 | struct sctp_bind_addr *bp; | |
546 | struct sctp_chunk *chunk; | |
547 | struct sctp_sockaddr_entry *laddr; | |
548 | union sctp_addr *addr; | |
dc022a98 | 549 | union sctp_addr saveaddr; |
1da177e4 LT |
550 | void *addr_buf; |
551 | struct sctp_af *af; | |
1da177e4 LT |
552 | struct list_head *p; |
553 | int i; | |
554 | int retval = 0; | |
555 | ||
1da177e4 LT |
556 | sp = sctp_sk(sk); |
557 | ep = sp->ep; | |
558 | ||
4e27428f XL |
559 | if (!ep->asconf_enable) |
560 | return retval; | |
561 | ||
bb33381d DB |
562 | pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", |
563 | __func__, sk, addrs, addrcnt); | |
1da177e4 | 564 | |
9dbc15f0 | 565 | list_for_each_entry(asoc, &ep->asocs, asocs) { |
1da177e4 LT |
566 | if (!asoc->peer.asconf_capable) |
567 | continue; | |
568 | ||
569 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_ADD_IP) | |
570 | continue; | |
571 | ||
572 | if (!sctp_state(asoc, ESTABLISHED)) | |
573 | continue; | |
574 | ||
575 | /* Check if any address in the packed array of addresses is | |
d808ad9a YH |
576 | * in the bind address list of the association. If so, |
577 | * do not send the asconf chunk to its peer, but continue with | |
1da177e4 LT |
578 | * other associations. |
579 | */ | |
580 | addr_buf = addrs; | |
581 | for (i = 0; i < addrcnt; i++) { | |
ea110733 | 582 | addr = addr_buf; |
1da177e4 LT |
583 | af = sctp_get_af_specific(addr->v4.sin_family); |
584 | if (!af) { | |
585 | retval = -EINVAL; | |
586 | goto out; | |
587 | } | |
588 | ||
589 | if (sctp_assoc_lookup_laddr(asoc, addr)) | |
590 | break; | |
591 | ||
592 | addr_buf += af->sockaddr_len; | |
593 | } | |
594 | if (i < addrcnt) | |
595 | continue; | |
596 | ||
559cf710 VY |
597 | /* Use the first valid address in bind addr list of |
598 | * association as Address Parameter of ASCONF CHUNK. | |
1da177e4 | 599 | */ |
1da177e4 LT |
600 | bp = &asoc->base.bind_addr; |
601 | p = bp->address_list.next; | |
602 | laddr = list_entry(p, struct sctp_sockaddr_entry, list); | |
5ae955cf | 603 | chunk = sctp_make_asconf_update_ip(asoc, &laddr->a, addrs, |
1da177e4 LT |
604 | addrcnt, SCTP_PARAM_ADD_IP); |
605 | if (!chunk) { | |
606 | retval = -ENOMEM; | |
607 | goto out; | |
608 | } | |
609 | ||
dc022a98 SS |
610 | /* Add the new addresses to the bind address list with |
611 | * use_as_src set to 0. | |
1da177e4 | 612 | */ |
dc022a98 SS |
613 | addr_buf = addrs; |
614 | for (i = 0; i < addrcnt; i++) { | |
ea110733 | 615 | addr = addr_buf; |
dc022a98 SS |
616 | af = sctp_get_af_specific(addr->v4.sin_family); |
617 | memcpy(&saveaddr, addr, af->sockaddr_len); | |
f57d96b2 | 618 | retval = sctp_add_bind_addr(bp, &saveaddr, |
133800d1 | 619 | sizeof(saveaddr), |
f57d96b2 | 620 | SCTP_ADDR_NEW, GFP_ATOMIC); |
dc022a98 SS |
621 | addr_buf += af->sockaddr_len; |
622 | } | |
8a07eb0a MH |
623 | if (asoc->src_out_of_asoc_ok) { |
624 | struct sctp_transport *trans; | |
625 | ||
626 | list_for_each_entry(trans, | |
627 | &asoc->peer.transport_addr_list, transports) { | |
8a07eb0a MH |
628 | trans->cwnd = min(4*asoc->pathmtu, max_t(__u32, |
629 | 2*asoc->pathmtu, 4380)); | |
630 | trans->ssthresh = asoc->peer.i.a_rwnd; | |
631 | trans->rto = asoc->rto_initial; | |
196d6759 | 632 | sctp_max_rto(asoc, trans); |
8a07eb0a | 633 | trans->rtt = trans->srtt = trans->rttvar = 0; |
6e91b578 | 634 | /* Clear the source and route cache */ |
8a07eb0a | 635 | sctp_transport_route(trans, NULL, |
6e91b578 | 636 | sctp_sk(asoc->base.sk)); |
8a07eb0a MH |
637 | } |
638 | } | |
639 | retval = sctp_send_asconf(asoc, chunk); | |
1da177e4 LT |
640 | } |
641 | ||
642 | out: | |
643 | return retval; | |
644 | } | |
645 | ||
646 | /* Remove a list of addresses from bind addresses list. Do not remove the | |
647 | * last address. | |
648 | * | |
649 | * Basically run through each address specified in the addrs/addrcnt | |
650 | * array/length pair, determine if it is IPv6 or IPv4 and call | |
651 | * sctp_del_bind() on it. | |
652 | * | |
653 | * If any of them fails, then the operation will be reversed and the | |
654 | * ones that were removed will be added back. | |
655 | * | |
656 | * At least one address has to be left; if only one address is | |
657 | * available, the operation will return -EBUSY. | |
658 | * | |
659 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
660 | */ | |
04675210 | 661 | static int sctp_bindx_rem(struct sock *sk, struct sockaddr *addrs, int addrcnt) |
1da177e4 LT |
662 | { |
663 | struct sctp_sock *sp = sctp_sk(sk); | |
664 | struct sctp_endpoint *ep = sp->ep; | |
665 | int cnt; | |
666 | struct sctp_bind_addr *bp = &ep->base.bind_addr; | |
667 | int retval = 0; | |
1da177e4 | 668 | void *addr_buf; |
c9a08505 | 669 | union sctp_addr *sa_addr; |
1da177e4 LT |
670 | struct sctp_af *af; |
671 | ||
bb33381d DB |
672 | pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", |
673 | __func__, sk, addrs, addrcnt); | |
1da177e4 LT |
674 | |
675 | addr_buf = addrs; | |
676 | for (cnt = 0; cnt < addrcnt; cnt++) { | |
677 | /* If the bind address list is empty or if there is only one | |
678 | * bind address, there is nothing more to be removed (we need | |
679 | * at least one address here). | |
680 | */ | |
681 | if (list_empty(&bp->address_list) || | |
682 | (sctp_list_single_entry(&bp->address_list))) { | |
683 | retval = -EBUSY; | |
684 | goto err_bindx_rem; | |
685 | } | |
686 | ||
ea110733 | 687 | sa_addr = addr_buf; |
c9a08505 | 688 | af = sctp_get_af_specific(sa_addr->sa.sa_family); |
1da177e4 LT |
689 | if (!af) { |
690 | retval = -EINVAL; | |
691 | goto err_bindx_rem; | |
692 | } | |
0304ff8a PG |
693 | |
694 | if (!af->addr_valid(sa_addr, sp, NULL)) { | |
695 | retval = -EADDRNOTAVAIL; | |
696 | goto err_bindx_rem; | |
697 | } | |
698 | ||
ee9cbaca VY |
699 | if (sa_addr->v4.sin_port && |
700 | sa_addr->v4.sin_port != htons(bp->port)) { | |
1da177e4 LT |
701 | retval = -EINVAL; |
702 | goto err_bindx_rem; | |
703 | } | |
704 | ||
ee9cbaca VY |
705 | if (!sa_addr->v4.sin_port) |
706 | sa_addr->v4.sin_port = htons(bp->port); | |
707 | ||
1da177e4 LT |
708 | /* FIXME - There is probably a need to check if sk->sk_saddr and |
709 | * sk->sk_rcv_addr are currently set to one of the addresses to | |
710 | * be removed. This is something which needs to be looked into | |
711 | * when we are fixing the outstanding issues with multi-homing | |
712 | * socket routing and failover schemes. Refer to comments in | |
713 | * sctp_do_bind(). -daisy | |
714 | */ | |
0ed90fb0 | 715 | retval = sctp_del_bind_addr(bp, sa_addr); |
1da177e4 LT |
716 | |
717 | addr_buf += af->sockaddr_len; | |
718 | err_bindx_rem: | |
719 | if (retval < 0) { | |
720 | /* Failed. Add the ones that has been removed back */ | |
721 | if (cnt > 0) | |
722 | sctp_bindx_add(sk, addrs, cnt); | |
723 | return retval; | |
724 | } | |
725 | } | |
726 | ||
727 | return retval; | |
728 | } | |
729 | ||
730 | /* Send an ASCONF chunk with Delete IP address parameters to all the peers of | |
731 | * the associations that are part of the endpoint indicating that a list of | |
732 | * local addresses are removed from the endpoint. | |
733 | * | |
d808ad9a | 734 | * If any of the addresses is already in the bind address list of the |
1da177e4 LT |
735 | * association, we do not send the chunk for that association. But it will not |
736 | * affect other associations. | |
737 | * | |
738 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
739 | */ | |
740 | static int sctp_send_asconf_del_ip(struct sock *sk, | |
741 | struct sockaddr *addrs, | |
742 | int addrcnt) | |
743 | { | |
744 | struct sctp_sock *sp; | |
745 | struct sctp_endpoint *ep; | |
746 | struct sctp_association *asoc; | |
dc022a98 | 747 | struct sctp_transport *transport; |
1da177e4 LT |
748 | struct sctp_bind_addr *bp; |
749 | struct sctp_chunk *chunk; | |
750 | union sctp_addr *laddr; | |
751 | void *addr_buf; | |
752 | struct sctp_af *af; | |
dc022a98 | 753 | struct sctp_sockaddr_entry *saddr; |
1da177e4 LT |
754 | int i; |
755 | int retval = 0; | |
8a07eb0a | 756 | int stored = 0; |
1da177e4 | 757 | |
8a07eb0a | 758 | chunk = NULL; |
1da177e4 LT |
759 | sp = sctp_sk(sk); |
760 | ep = sp->ep; | |
761 | ||
4e27428f XL |
762 | if (!ep->asconf_enable) |
763 | return retval; | |
764 | ||
bb33381d DB |
765 | pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", |
766 | __func__, sk, addrs, addrcnt); | |
1da177e4 | 767 | |
9dbc15f0 | 768 | list_for_each_entry(asoc, &ep->asocs, asocs) { |
1da177e4 LT |
769 | |
770 | if (!asoc->peer.asconf_capable) | |
771 | continue; | |
772 | ||
773 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_DEL_IP) | |
774 | continue; | |
775 | ||
776 | if (!sctp_state(asoc, ESTABLISHED)) | |
777 | continue; | |
778 | ||
779 | /* Check if any address in the packed array of addresses is | |
d808ad9a | 780 | * not present in the bind address list of the association. |
1da177e4 LT |
781 | * If so, do not send the asconf chunk to its peer, but |
782 | * continue with other associations. | |
783 | */ | |
784 | addr_buf = addrs; | |
785 | for (i = 0; i < addrcnt; i++) { | |
ea110733 | 786 | laddr = addr_buf; |
1da177e4 LT |
787 | af = sctp_get_af_specific(laddr->v4.sin_family); |
788 | if (!af) { | |
789 | retval = -EINVAL; | |
790 | goto out; | |
791 | } | |
792 | ||
793 | if (!sctp_assoc_lookup_laddr(asoc, laddr)) | |
794 | break; | |
795 | ||
796 | addr_buf += af->sockaddr_len; | |
797 | } | |
798 | if (i < addrcnt) | |
799 | continue; | |
800 | ||
801 | /* Find one address in the association's bind address list | |
802 | * that is not in the packed array of addresses. This is to | |
803 | * make sure that we do not delete all the addresses in the | |
804 | * association. | |
805 | */ | |
1da177e4 LT |
806 | bp = &asoc->base.bind_addr; |
807 | laddr = sctp_find_unmatch_addr(bp, (union sctp_addr *)addrs, | |
808 | addrcnt, sp); | |
8a07eb0a MH |
809 | if ((laddr == NULL) && (addrcnt == 1)) { |
810 | if (asoc->asconf_addr_del_pending) | |
811 | continue; | |
812 | asoc->asconf_addr_del_pending = | |
813 | kzalloc(sizeof(union sctp_addr), GFP_ATOMIC); | |
6d65e5ee MH |
814 | if (asoc->asconf_addr_del_pending == NULL) { |
815 | retval = -ENOMEM; | |
816 | goto out; | |
817 | } | |
8a07eb0a MH |
818 | asoc->asconf_addr_del_pending->sa.sa_family = |
819 | addrs->sa_family; | |
820 | asoc->asconf_addr_del_pending->v4.sin_port = | |
821 | htons(bp->port); | |
822 | if (addrs->sa_family == AF_INET) { | |
823 | struct sockaddr_in *sin; | |
824 | ||
825 | sin = (struct sockaddr_in *)addrs; | |
826 | asoc->asconf_addr_del_pending->v4.sin_addr.s_addr = sin->sin_addr.s_addr; | |
827 | } else if (addrs->sa_family == AF_INET6) { | |
828 | struct sockaddr_in6 *sin6; | |
829 | ||
830 | sin6 = (struct sockaddr_in6 *)addrs; | |
4e3fd7a0 | 831 | asoc->asconf_addr_del_pending->v6.sin6_addr = sin6->sin6_addr; |
8a07eb0a | 832 | } |
bb33381d DB |
833 | |
834 | pr_debug("%s: keep the last address asoc:%p %pISc at %p\n", | |
835 | __func__, asoc, &asoc->asconf_addr_del_pending->sa, | |
836 | asoc->asconf_addr_del_pending); | |
837 | ||
8a07eb0a MH |
838 | asoc->src_out_of_asoc_ok = 1; |
839 | stored = 1; | |
840 | goto skip_mkasconf; | |
841 | } | |
1da177e4 | 842 | |
88362ad8 DB |
843 | if (laddr == NULL) |
844 | return -EINVAL; | |
845 | ||
559cf710 VY |
846 | /* We do not need RCU protection throughout this loop |
847 | * because this is done under a socket lock from the | |
848 | * setsockopt call. | |
849 | */ | |
1da177e4 LT |
850 | chunk = sctp_make_asconf_update_ip(asoc, laddr, addrs, addrcnt, |
851 | SCTP_PARAM_DEL_IP); | |
852 | if (!chunk) { | |
853 | retval = -ENOMEM; | |
854 | goto out; | |
855 | } | |
856 | ||
8a07eb0a | 857 | skip_mkasconf: |
dc022a98 SS |
858 | /* Reset use_as_src flag for the addresses in the bind address |
859 | * list that are to be deleted. | |
860 | */ | |
dc022a98 SS |
861 | addr_buf = addrs; |
862 | for (i = 0; i < addrcnt; i++) { | |
ea110733 | 863 | laddr = addr_buf; |
dc022a98 | 864 | af = sctp_get_af_specific(laddr->v4.sin_family); |
559cf710 | 865 | list_for_each_entry(saddr, &bp->address_list, list) { |
5f242a13 | 866 | if (sctp_cmp_addr_exact(&saddr->a, laddr)) |
f57d96b2 | 867 | saddr->state = SCTP_ADDR_DEL; |
dc022a98 SS |
868 | } |
869 | addr_buf += af->sockaddr_len; | |
870 | } | |
1da177e4 | 871 | |
dc022a98 SS |
872 | /* Update the route and saddr entries for all the transports |
873 | * as some of the addresses in the bind address list are | |
874 | * about to be deleted and cannot be used as source addresses. | |
1da177e4 | 875 | */ |
9dbc15f0 RD |
876 | list_for_each_entry(transport, &asoc->peer.transport_addr_list, |
877 | transports) { | |
dc022a98 SS |
878 | sctp_transport_route(transport, NULL, |
879 | sctp_sk(asoc->base.sk)); | |
880 | } | |
881 | ||
8a07eb0a MH |
882 | if (stored) |
883 | /* We don't need to transmit ASCONF */ | |
884 | continue; | |
dc022a98 | 885 | retval = sctp_send_asconf(asoc, chunk); |
1da177e4 LT |
886 | } |
887 | out: | |
888 | return retval; | |
889 | } | |
890 | ||
9f7d653b MH |
891 | /* set addr events to assocs in the endpoint. ep and addr_wq must be locked */ |
892 | int sctp_asconf_mgmt(struct sctp_sock *sp, struct sctp_sockaddr_entry *addrw) | |
893 | { | |
894 | struct sock *sk = sctp_opt2sk(sp); | |
895 | union sctp_addr *addr; | |
896 | struct sctp_af *af; | |
897 | ||
898 | /* It is safe to write port space in caller. */ | |
899 | addr = &addrw->a; | |
900 | addr->v4.sin_port = htons(sp->ep->base.bind_addr.port); | |
901 | af = sctp_get_af_specific(addr->sa.sa_family); | |
902 | if (!af) | |
903 | return -EINVAL; | |
904 | if (sctp_verify_addr(sk, addr, af->sockaddr_len)) | |
905 | return -EINVAL; | |
906 | ||
907 | if (addrw->state == SCTP_ADDR_NEW) | |
908 | return sctp_send_asconf_add_ip(sk, (struct sockaddr *)addr, 1); | |
909 | else | |
910 | return sctp_send_asconf_del_ip(sk, (struct sockaddr *)addr, 1); | |
911 | } | |
912 | ||
1da177e4 LT |
913 | /* Helper for tunneling sctp_bindx() requests through sctp_setsockopt() |
914 | * | |
915 | * API 8.1 | |
916 | * int sctp_bindx(int sd, struct sockaddr *addrs, int addrcnt, | |
917 | * int flags); | |
918 | * | |
919 | * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses. | |
920 | * If the sd is an IPv6 socket, the addresses passed can either be IPv4 | |
921 | * or IPv6 addresses. | |
922 | * | |
923 | * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see | |
924 | * Section 3.1.2 for this usage. | |
925 | * | |
926 | * addrs is a pointer to an array of one or more socket addresses. Each | |
927 | * address is contained in its appropriate structure (i.e. struct | |
928 | * sockaddr_in or struct sockaddr_in6) the family of the address type | |
23c435f7 | 929 | * must be used to distinguish the address length (note that this |
1da177e4 LT |
930 | * representation is termed a "packed array" of addresses). The caller |
931 | * specifies the number of addresses in the array with addrcnt. | |
932 | * | |
933 | * On success, sctp_bindx() returns 0. On failure, sctp_bindx() returns | |
934 | * -1, and sets errno to the appropriate error code. | |
935 | * | |
936 | * For SCTP, the port given in each socket address must be the same, or | |
937 | * sctp_bindx() will fail, setting errno to EINVAL. | |
938 | * | |
939 | * The flags parameter is formed from the bitwise OR of zero or more of | |
940 | * the following currently defined flags: | |
941 | * | |
942 | * SCTP_BINDX_ADD_ADDR | |
943 | * | |
944 | * SCTP_BINDX_REM_ADDR | |
945 | * | |
946 | * SCTP_BINDX_ADD_ADDR directs SCTP to add the given addresses to the | |
947 | * association, and SCTP_BINDX_REM_ADDR directs SCTP to remove the given | |
948 | * addresses from the association. The two flags are mutually exclusive; | |
949 | * if both are given, sctp_bindx() will fail with EINVAL. A caller may | |
950 | * not remove all addresses from an association; sctp_bindx() will | |
951 | * reject such an attempt with EINVAL. | |
952 | * | |
953 | * An application can use sctp_bindx(SCTP_BINDX_ADD_ADDR) to associate | |
954 | * additional addresses with an endpoint after calling bind(). Or use | |
955 | * sctp_bindx(SCTP_BINDX_REM_ADDR) to remove some addresses a listening | |
956 | * socket is associated with so that no new association accepted will be | |
957 | * associated with those addresses. If the endpoint supports dynamic | |
958 | * address a SCTP_BINDX_REM_ADDR or SCTP_BINDX_ADD_ADDR may cause a | |
959 | * endpoint to send the appropriate message to the peer to change the | |
960 | * peers address lists. | |
961 | * | |
962 | * Adding and removing addresses from a connected association is | |
963 | * optional functionality. Implementations that do not support this | |
964 | * functionality should return EOPNOTSUPP. | |
965 | * | |
966 | * Basically do nothing but copying the addresses from user to kernel | |
967 | * land and invoking either sctp_bindx_add() or sctp_bindx_rem() on the sk. | |
3f7a87d2 FF |
968 | * This is used for tunneling the sctp_bindx() request through sctp_setsockopt() |
969 | * from userspace. | |
1da177e4 | 970 | * |
1da177e4 LT |
971 | * On exit there is no need to do sockfd_put(), sys_setsockopt() does |
972 | * it. | |
973 | * | |
974 | * sk The sk of the socket | |
05bfd366 | 975 | * addrs The pointer to the addresses |
1da177e4 LT |
976 | * addrssize Size of the addrs buffer |
977 | * op Operation to perform (add or remove, see the flags of | |
978 | * sctp_bindx) | |
979 | * | |
980 | * Returns 0 if ok, <0 errno code on error. | |
981 | */ | |
8c7517f5 CH |
982 | static int sctp_setsockopt_bindx(struct sock *sk, struct sockaddr *addrs, |
983 | int addrs_size, int op) | |
1da177e4 | 984 | { |
1da177e4 LT |
985 | int err; |
986 | int addrcnt = 0; | |
987 | int walk_size = 0; | |
988 | struct sockaddr *sa_addr; | |
05bfd366 | 989 | void *addr_buf = addrs; |
1da177e4 LT |
990 | struct sctp_af *af; |
991 | ||
bb33381d | 992 | pr_debug("%s: sk:%p addrs:%p addrs_size:%d opt:%d\n", |
8c7517f5 | 993 | __func__, sk, addr_buf, addrs_size, op); |
1da177e4 LT |
994 | |
995 | if (unlikely(addrs_size <= 0)) | |
996 | return -EINVAL; | |
997 | ||
d808ad9a | 998 | /* Walk through the addrs buffer and count the number of addresses. */ |
1da177e4 | 999 | while (walk_size < addrs_size) { |
05bfd366 | 1000 | if (walk_size + sizeof(sa_family_t) > addrs_size) |
d7e0d19a | 1001 | return -EINVAL; |
d7e0d19a | 1002 | |
ea110733 | 1003 | sa_addr = addr_buf; |
1da177e4 LT |
1004 | af = sctp_get_af_specific(sa_addr->sa_family); |
1005 | ||
1006 | /* If the address family is not supported or if this address | |
1007 | * causes the address buffer to overflow return EINVAL. | |
d808ad9a | 1008 | */ |
05bfd366 | 1009 | if (!af || (walk_size + af->sockaddr_len) > addrs_size) |
1da177e4 | 1010 | return -EINVAL; |
1da177e4 LT |
1011 | addrcnt++; |
1012 | addr_buf += af->sockaddr_len; | |
1013 | walk_size += af->sockaddr_len; | |
1014 | } | |
1015 | ||
1016 | /* Do the work. */ | |
1017 | switch (op) { | |
1018 | case SCTP_BINDX_ADD_ADDR: | |
2277c7cd RH |
1019 | /* Allow security module to validate bindx addresses. */ |
1020 | err = security_sctp_bind_connect(sk, SCTP_SOCKOPT_BINDX_ADD, | |
05bfd366 | 1021 | addrs, addrs_size); |
2277c7cd | 1022 | if (err) |
05bfd366 CH |
1023 | return err; |
1024 | err = sctp_bindx_add(sk, addrs, addrcnt); | |
1da177e4 | 1025 | if (err) |
05bfd366 CH |
1026 | return err; |
1027 | return sctp_send_asconf_add_ip(sk, addrs, addrcnt); | |
1da177e4 | 1028 | case SCTP_BINDX_REM_ADDR: |
05bfd366 | 1029 | err = sctp_bindx_rem(sk, addrs, addrcnt); |
1da177e4 | 1030 | if (err) |
05bfd366 CH |
1031 | return err; |
1032 | return sctp_send_asconf_del_ip(sk, addrs, addrcnt); | |
1da177e4 LT |
1033 | |
1034 | default: | |
05bfd366 | 1035 | return -EINVAL; |
3ff50b79 | 1036 | } |
05bfd366 | 1037 | } |
1da177e4 | 1038 | |
c0425a42 CH |
1039 | static int sctp_bind_add(struct sock *sk, struct sockaddr *addrs, |
1040 | int addrlen) | |
1041 | { | |
1042 | int err; | |
1043 | ||
1044 | lock_sock(sk); | |
8c7517f5 | 1045 | err = sctp_setsockopt_bindx(sk, addrs, addrlen, SCTP_BINDX_ADD_ADDR); |
c0425a42 CH |
1046 | release_sock(sk); |
1047 | return err; | |
1048 | } | |
1049 | ||
f26f9951 XL |
1050 | static int sctp_connect_new_asoc(struct sctp_endpoint *ep, |
1051 | const union sctp_addr *daddr, | |
1052 | const struct sctp_initmsg *init, | |
1053 | struct sctp_transport **tp) | |
1054 | { | |
1055 | struct sctp_association *asoc; | |
1056 | struct sock *sk = ep->base.sk; | |
1057 | struct net *net = sock_net(sk); | |
1058 | enum sctp_scope scope; | |
1059 | int err; | |
1060 | ||
1061 | if (sctp_endpoint_is_peeled_off(ep, daddr)) | |
1062 | return -EADDRNOTAVAIL; | |
1063 | ||
1064 | if (!ep->base.bind_addr.port) { | |
1065 | if (sctp_autobind(sk)) | |
1066 | return -EAGAIN; | |
1067 | } else { | |
82f31ebf | 1068 | if (inet_port_requires_bind_service(net, ep->base.bind_addr.port) && |
f26f9951 XL |
1069 | !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE)) |
1070 | return -EACCES; | |
1071 | } | |
1072 | ||
1073 | scope = sctp_scope(daddr); | |
1074 | asoc = sctp_association_new(ep, sk, scope, GFP_KERNEL); | |
1075 | if (!asoc) | |
1076 | return -ENOMEM; | |
1077 | ||
1078 | err = sctp_assoc_set_bind_addr_from_ep(asoc, scope, GFP_KERNEL); | |
1079 | if (err < 0) | |
1080 | goto free; | |
1081 | ||
1082 | *tp = sctp_assoc_add_peer(asoc, daddr, GFP_KERNEL, SCTP_UNKNOWN); | |
1083 | if (!*tp) { | |
1084 | err = -ENOMEM; | |
1085 | goto free; | |
1086 | } | |
1087 | ||
1088 | if (!init) | |
1089 | return 0; | |
1090 | ||
1091 | if (init->sinit_num_ostreams) { | |
1092 | __u16 outcnt = init->sinit_num_ostreams; | |
1093 | ||
1094 | asoc->c.sinit_num_ostreams = outcnt; | |
1095 | /* outcnt has been changed, need to re-init stream */ | |
1096 | err = sctp_stream_init(&asoc->stream, outcnt, 0, GFP_KERNEL); | |
1097 | if (err) | |
1098 | goto free; | |
1099 | } | |
1100 | ||
1101 | if (init->sinit_max_instreams) | |
1102 | asoc->c.sinit_max_instreams = init->sinit_max_instreams; | |
1103 | ||
1104 | if (init->sinit_max_attempts) | |
1105 | asoc->max_init_attempts = init->sinit_max_attempts; | |
1106 | ||
1107 | if (init->sinit_max_init_timeo) | |
1108 | asoc->max_init_timeo = | |
1109 | msecs_to_jiffies(init->sinit_max_init_timeo); | |
1110 | ||
1111 | return 0; | |
1112 | free: | |
1113 | sctp_association_free(asoc); | |
1114 | return err; | |
1115 | } | |
1116 | ||
a64e59c7 XL |
1117 | static int sctp_connect_add_peer(struct sctp_association *asoc, |
1118 | union sctp_addr *daddr, int addr_len) | |
1119 | { | |
1120 | struct sctp_endpoint *ep = asoc->ep; | |
1121 | struct sctp_association *old; | |
1122 | struct sctp_transport *t; | |
1123 | int err; | |
1124 | ||
1125 | err = sctp_verify_addr(ep->base.sk, daddr, addr_len); | |
1126 | if (err) | |
1127 | return err; | |
1128 | ||
1129 | old = sctp_endpoint_lookup_assoc(ep, daddr, &t); | |
1130 | if (old && old != asoc) | |
1131 | return old->state >= SCTP_STATE_ESTABLISHED ? -EISCONN | |
1132 | : -EALREADY; | |
1133 | ||
1134 | if (sctp_endpoint_is_peeled_off(ep, daddr)) | |
1135 | return -EADDRNOTAVAIL; | |
1136 | ||
1137 | t = sctp_assoc_add_peer(asoc, daddr, GFP_KERNEL, SCTP_UNKNOWN); | |
1138 | if (!t) | |
1139 | return -ENOMEM; | |
1140 | ||
1141 | return 0; | |
1142 | } | |
1143 | ||
3f7a87d2 FF |
1144 | /* __sctp_connect(struct sock* sk, struct sockaddr *kaddrs, int addrs_size) |
1145 | * | |
1146 | * Common routine for handling connect() and sctp_connectx(). | |
1147 | * Connect will come in with just a single address. | |
1148 | */ | |
dd8378b3 XL |
1149 | static int __sctp_connect(struct sock *sk, struct sockaddr *kaddrs, |
1150 | int addrs_size, int flags, sctp_assoc_t *assoc_id) | |
3f7a87d2 | 1151 | { |
dd8378b3 XL |
1152 | struct sctp_sock *sp = sctp_sk(sk); |
1153 | struct sctp_endpoint *ep = sp->ep; | |
3f7a87d2 | 1154 | struct sctp_transport *transport; |
a64e59c7 | 1155 | struct sctp_association *asoc; |
dd8378b3 XL |
1156 | void *addr_buf = kaddrs; |
1157 | union sctp_addr *daddr; | |
dd8378b3 XL |
1158 | struct sctp_af *af; |
1159 | int walk_size, err; | |
3f7a87d2 | 1160 | long timeo; |
3f7a87d2 | 1161 | |
e5b13f34 | 1162 | if (sctp_sstate(sk, ESTABLISHED) || sctp_sstate(sk, CLOSING) || |
dd8378b3 XL |
1163 | (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))) |
1164 | return -EISCONN; | |
1165 | ||
1166 | daddr = addr_buf; | |
1167 | af = sctp_get_af_specific(daddr->sa.sa_family); | |
1168 | if (!af || af->sockaddr_len > addrs_size) | |
1169 | return -EINVAL; | |
1170 | ||
1171 | err = sctp_verify_addr(sk, daddr, af->sockaddr_len); | |
1172 | if (err) | |
1173 | return err; | |
1174 | ||
1175 | asoc = sctp_endpoint_lookup_assoc(ep, daddr, &transport); | |
1176 | if (asoc) | |
1177 | return asoc->state >= SCTP_STATE_ESTABLISHED ? -EISCONN | |
1178 | : -EALREADY; | |
1179 | ||
f26f9951 XL |
1180 | err = sctp_connect_new_asoc(ep, daddr, NULL, &transport); |
1181 | if (err) | |
1182 | return err; | |
1183 | asoc = transport->asoc; | |
3f7a87d2 | 1184 | |
dd8378b3 XL |
1185 | addr_buf += af->sockaddr_len; |
1186 | walk_size = af->sockaddr_len; | |
1187 | while (walk_size < addrs_size) { | |
1188 | err = -EINVAL; | |
1189 | if (walk_size + sizeof(sa_family_t) > addrs_size) | |
3f7a87d2 | 1190 | goto out_free; |
d7e0d19a | 1191 | |
dd8378b3 XL |
1192 | daddr = addr_buf; |
1193 | af = sctp_get_af_specific(daddr->sa.sa_family); | |
1194 | if (!af || af->sockaddr_len + walk_size > addrs_size) | |
1195 | goto out_free; | |
e4d1feab | 1196 | |
dd8378b3 | 1197 | if (asoc->peer.port != ntohs(daddr->v4.sin_port)) |
3f7a87d2 FF |
1198 | goto out_free; |
1199 | ||
a64e59c7 | 1200 | err = sctp_connect_add_peer(asoc, daddr, af->sockaddr_len); |
dd8378b3 | 1201 | if (err) |
16d00fb7 | 1202 | goto out_free; |
3f7a87d2 | 1203 | |
dd8378b3 | 1204 | addr_buf += af->sockaddr_len; |
3f7a87d2 FF |
1205 | walk_size += af->sockaddr_len; |
1206 | } | |
1207 | ||
c6ba68a2 VY |
1208 | /* In case the user of sctp_connectx() wants an association |
1209 | * id back, assign one now. | |
1210 | */ | |
1211 | if (assoc_id) { | |
1212 | err = sctp_assoc_set_id(asoc, GFP_KERNEL); | |
1213 | if (err < 0) | |
1214 | goto out_free; | |
1215 | } | |
1216 | ||
f26f9951 | 1217 | err = sctp_primitive_ASSOCIATE(sock_net(sk), asoc, NULL); |
dd8378b3 | 1218 | if (err < 0) |
3f7a87d2 | 1219 | goto out_free; |
3f7a87d2 FF |
1220 | |
1221 | /* Initialize sk's dport and daddr for getpeername() */ | |
c720c7e8 | 1222 | inet_sk(sk)->inet_dport = htons(asoc->peer.port); |
dd8378b3 | 1223 | sp->pf->to_sk_daddr(daddr, sk); |
8de8c873 | 1224 | sk->sk_err = 0; |
3f7a87d2 | 1225 | |
7233bc84 | 1226 | if (assoc_id) |
88a0a948 | 1227 | *assoc_id = asoc->assoc_id; |
2277c7cd | 1228 | |
dd8378b3 XL |
1229 | timeo = sock_sndtimeo(sk, flags & O_NONBLOCK); |
1230 | return sctp_wait_for_connect(asoc, &timeo); | |
3f7a87d2 FF |
1231 | |
1232 | out_free: | |
bb33381d DB |
1233 | pr_debug("%s: took out_free path with asoc:%p kaddrs:%p err:%d\n", |
1234 | __func__, asoc, kaddrs, err); | |
dd8378b3 | 1235 | sctp_association_free(asoc); |
3f7a87d2 FF |
1236 | return err; |
1237 | } | |
1238 | ||
1239 | /* Helper for tunneling sctp_connectx() requests through sctp_setsockopt() | |
1240 | * | |
1241 | * API 8.9 | |
88a0a948 VY |
1242 | * int sctp_connectx(int sd, struct sockaddr *addrs, int addrcnt, |
1243 | * sctp_assoc_t *asoc); | |
3f7a87d2 FF |
1244 | * |
1245 | * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses. | |
1246 | * If the sd is an IPv6 socket, the addresses passed can either be IPv4 | |
1247 | * or IPv6 addresses. | |
1248 | * | |
1249 | * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see | |
1250 | * Section 3.1.2 for this usage. | |
1251 | * | |
1252 | * addrs is a pointer to an array of one or more socket addresses. Each | |
1253 | * address is contained in its appropriate structure (i.e. struct | |
1254 | * sockaddr_in or struct sockaddr_in6) the family of the address type | |
1255 | * must be used to distengish the address length (note that this | |
1256 | * representation is termed a "packed array" of addresses). The caller | |
1257 | * specifies the number of addresses in the array with addrcnt. | |
1258 | * | |
88a0a948 VY |
1259 | * On success, sctp_connectx() returns 0. It also sets the assoc_id to |
1260 | * the association id of the new association. On failure, sctp_connectx() | |
1261 | * returns -1, and sets errno to the appropriate error code. The assoc_id | |
1262 | * is not touched by the kernel. | |
3f7a87d2 FF |
1263 | * |
1264 | * For SCTP, the port given in each socket address must be the same, or | |
1265 | * sctp_connectx() will fail, setting errno to EINVAL. | |
1266 | * | |
1267 | * An application can use sctp_connectx to initiate an association with | |
1268 | * an endpoint that is multi-homed. Much like sctp_bindx() this call | |
1269 | * allows a caller to specify multiple addresses at which a peer can be | |
1270 | * reached. The way the SCTP stack uses the list of addresses to set up | |
25985edc | 1271 | * the association is implementation dependent. This function only |
3f7a87d2 FF |
1272 | * specifies that the stack will try to make use of all the addresses in |
1273 | * the list when needed. | |
1274 | * | |
1275 | * Note that the list of addresses passed in is only used for setting up | |
1276 | * the association. It does not necessarily equal the set of addresses | |
1277 | * the peer uses for the resulting association. If the caller wants to | |
1278 | * find out the set of peer addresses, it must use sctp_getpaddrs() to | |
1279 | * retrieve them after the association has been set up. | |
1280 | * | |
1281 | * Basically do nothing but copying the addresses from user to kernel | |
1282 | * land and invoking either sctp_connectx(). This is used for tunneling | |
1283 | * the sctp_connectx() request through sctp_setsockopt() from userspace. | |
1284 | * | |
3f7a87d2 FF |
1285 | * On exit there is no need to do sockfd_put(), sys_setsockopt() does |
1286 | * it. | |
1287 | * | |
1288 | * sk The sk of the socket | |
ce5b2f89 | 1289 | * addrs The pointer to the addresses |
3f7a87d2 FF |
1290 | * addrssize Size of the addrs buffer |
1291 | * | |
88a0a948 | 1292 | * Returns >=0 if ok, <0 errno code on error. |
3f7a87d2 | 1293 | */ |
ce5b2f89 CH |
1294 | static int __sctp_setsockopt_connectx(struct sock *sk, struct sockaddr *kaddrs, |
1295 | int addrs_size, sctp_assoc_t *assoc_id) | |
3f7a87d2 | 1296 | { |
644fbdea | 1297 | int err = 0, flags = 0; |
3f7a87d2 | 1298 | |
bb33381d | 1299 | pr_debug("%s: sk:%p addrs:%p addrs_size:%d\n", |
ce5b2f89 | 1300 | __func__, sk, kaddrs, addrs_size); |
3f7a87d2 | 1301 | |
f40f1177 XL |
1302 | /* make sure the 1st addr's sa_family is accessible later */ |
1303 | if (unlikely(addrs_size < sizeof(sa_family_t))) | |
3f7a87d2 FF |
1304 | return -EINVAL; |
1305 | ||
2277c7cd RH |
1306 | /* Allow security module to validate connectx addresses. */ |
1307 | err = security_sctp_bind_connect(sk, SCTP_SOCKOPT_CONNECTX, | |
1308 | (struct sockaddr *)kaddrs, | |
1309 | addrs_size); | |
1310 | if (err) | |
ce5b2f89 | 1311 | return err; |
2277c7cd | 1312 | |
644fbdea XL |
1313 | /* in-kernel sockets don't generally have a file allocated to them |
1314 | * if all they do is call sock_create_kern(). | |
1315 | */ | |
1316 | if (sk->sk_socket->file) | |
1317 | flags = sk->sk_socket->file->f_flags; | |
1318 | ||
ce5b2f89 | 1319 | return __sctp_connect(sk, kaddrs, addrs_size, flags, assoc_id); |
3f7a87d2 FF |
1320 | } |
1321 | ||
88a0a948 VY |
1322 | /* |
1323 | * This is an older interface. It's kept for backward compatibility | |
1324 | * to the option that doesn't provide association id. | |
1325 | */ | |
26ac8e5f | 1326 | static int sctp_setsockopt_connectx_old(struct sock *sk, |
ce5b2f89 | 1327 | struct sockaddr *kaddrs, |
dda91928 | 1328 | int addrs_size) |
88a0a948 | 1329 | { |
ce5b2f89 | 1330 | return __sctp_setsockopt_connectx(sk, kaddrs, addrs_size, NULL); |
88a0a948 VY |
1331 | } |
1332 | ||
1333 | /* | |
1334 | * New interface for the API. The since the API is done with a socket | |
1335 | * option, to make it simple we feed back the association id is as a return | |
1336 | * indication to the call. Error is always negative and association id is | |
1337 | * always positive. | |
1338 | */ | |
26ac8e5f | 1339 | static int sctp_setsockopt_connectx(struct sock *sk, |
ce5b2f89 | 1340 | struct sockaddr *kaddrs, |
dda91928 | 1341 | int addrs_size) |
88a0a948 VY |
1342 | { |
1343 | sctp_assoc_t assoc_id = 0; | |
1344 | int err = 0; | |
1345 | ||
ce5b2f89 | 1346 | err = __sctp_setsockopt_connectx(sk, kaddrs, addrs_size, &assoc_id); |
88a0a948 VY |
1347 | |
1348 | if (err) | |
1349 | return err; | |
1350 | else | |
1351 | return assoc_id; | |
1352 | } | |
1353 | ||
c6ba68a2 | 1354 | /* |
f9c67811 VY |
1355 | * New (hopefully final) interface for the API. |
1356 | * We use the sctp_getaddrs_old structure so that use-space library | |
ffd59393 | 1357 | * can avoid any unnecessary allocations. The only different part |
f9c67811 | 1358 | * is that we store the actual length of the address buffer into the |
ffd59393 | 1359 | * addrs_num structure member. That way we can re-use the existing |
f9c67811 | 1360 | * code. |
c6ba68a2 | 1361 | */ |
ffd59393 DB |
1362 | #ifdef CONFIG_COMPAT |
1363 | struct compat_sctp_getaddrs_old { | |
1364 | sctp_assoc_t assoc_id; | |
1365 | s32 addr_num; | |
1366 | compat_uptr_t addrs; /* struct sockaddr * */ | |
1367 | }; | |
1368 | #endif | |
1369 | ||
26ac8e5f | 1370 | static int sctp_getsockopt_connectx3(struct sock *sk, int len, |
dda91928 DB |
1371 | char __user *optval, |
1372 | int __user *optlen) | |
c6ba68a2 | 1373 | { |
f9c67811 | 1374 | struct sctp_getaddrs_old param; |
c6ba68a2 | 1375 | sctp_assoc_t assoc_id = 0; |
ce5b2f89 | 1376 | struct sockaddr *kaddrs; |
c6ba68a2 VY |
1377 | int err = 0; |
1378 | ||
ffd59393 | 1379 | #ifdef CONFIG_COMPAT |
96c0e0a9 | 1380 | if (in_compat_syscall()) { |
ffd59393 | 1381 | struct compat_sctp_getaddrs_old param32; |
c6ba68a2 | 1382 | |
ffd59393 DB |
1383 | if (len < sizeof(param32)) |
1384 | return -EINVAL; | |
1385 | if (copy_from_user(¶m32, optval, sizeof(param32))) | |
1386 | return -EFAULT; | |
f9c67811 | 1387 | |
ffd59393 DB |
1388 | param.assoc_id = param32.assoc_id; |
1389 | param.addr_num = param32.addr_num; | |
1390 | param.addrs = compat_ptr(param32.addrs); | |
1391 | } else | |
1392 | #endif | |
1393 | { | |
1394 | if (len < sizeof(param)) | |
1395 | return -EINVAL; | |
1396 | if (copy_from_user(¶m, optval, sizeof(param))) | |
1397 | return -EFAULT; | |
1398 | } | |
c6ba68a2 | 1399 | |
ce5b2f89 CH |
1400 | kaddrs = memdup_user(param.addrs, param.addr_num); |
1401 | if (IS_ERR(kaddrs)) | |
1402 | return PTR_ERR(kaddrs); | |
1403 | ||
1404 | err = __sctp_setsockopt_connectx(sk, kaddrs, param.addr_num, &assoc_id); | |
1405 | kfree(kaddrs); | |
c6ba68a2 VY |
1406 | if (err == 0 || err == -EINPROGRESS) { |
1407 | if (copy_to_user(optval, &assoc_id, sizeof(assoc_id))) | |
1408 | return -EFAULT; | |
1409 | if (put_user(sizeof(assoc_id), optlen)) | |
1410 | return -EFAULT; | |
1411 | } | |
1412 | ||
1413 | return err; | |
1414 | } | |
1415 | ||
1da177e4 LT |
1416 | /* API 3.1.4 close() - UDP Style Syntax |
1417 | * Applications use close() to perform graceful shutdown (as described in | |
1418 | * Section 10.1 of [SCTP]) on ALL the associations currently represented | |
1419 | * by a UDP-style socket. | |
1420 | * | |
1421 | * The syntax is | |
1422 | * | |
1423 | * ret = close(int sd); | |
1424 | * | |
1425 | * sd - the socket descriptor of the associations to be closed. | |
1426 | * | |
1427 | * To gracefully shutdown a specific association represented by the | |
1428 | * UDP-style socket, an application should use the sendmsg() call, | |
1429 | * passing no user data, but including the appropriate flag in the | |
1430 | * ancillary data (see Section xxxx). | |
1431 | * | |
1432 | * If sd in the close() call is a branched-off socket representing only | |
1433 | * one association, the shutdown is performed on that association only. | |
1434 | * | |
1435 | * 4.1.6 close() - TCP Style Syntax | |
1436 | * | |
1437 | * Applications use close() to gracefully close down an association. | |
1438 | * | |
1439 | * The syntax is: | |
1440 | * | |
1441 | * int close(int sd); | |
1442 | * | |
1443 | * sd - the socket descriptor of the association to be closed. | |
1444 | * | |
1445 | * After an application calls close() on a socket descriptor, no further | |
1446 | * socket operations will succeed on that descriptor. | |
1447 | * | |
1448 | * API 7.1.4 SO_LINGER | |
1449 | * | |
1450 | * An application using the TCP-style socket can use this option to | |
1451 | * perform the SCTP ABORT primitive. The linger option structure is: | |
1452 | * | |
1453 | * struct linger { | |
1454 | * int l_onoff; // option on/off | |
1455 | * int l_linger; // linger time | |
1456 | * }; | |
1457 | * | |
1458 | * To enable the option, set l_onoff to 1. If the l_linger value is set | |
1459 | * to 0, calling close() is the same as the ABORT primitive. If the | |
1460 | * value is set to a negative value, the setsockopt() call will return | |
1461 | * an error. If the value is set to a positive value linger_time, the | |
1462 | * close() can be blocked for at most linger_time ms. If the graceful | |
1463 | * shutdown phase does not finish during this period, close() will | |
1464 | * return but the graceful shutdown phase continues in the system. | |
1465 | */ | |
dda91928 | 1466 | static void sctp_close(struct sock *sk, long timeout) |
1da177e4 | 1467 | { |
55e26eb9 | 1468 | struct net *net = sock_net(sk); |
1da177e4 LT |
1469 | struct sctp_endpoint *ep; |
1470 | struct sctp_association *asoc; | |
1471 | struct list_head *pos, *temp; | |
cd4fcc70 | 1472 | unsigned int data_was_unread; |
1da177e4 | 1473 | |
bb33381d | 1474 | pr_debug("%s: sk:%p, timeout:%ld\n", __func__, sk, timeout); |
1da177e4 | 1475 | |
6dfe4b97 | 1476 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 | 1477 | sk->sk_shutdown = SHUTDOWN_MASK; |
cbabf463 | 1478 | inet_sk_set_state(sk, SCTP_SS_CLOSING); |
1da177e4 LT |
1479 | |
1480 | ep = sctp_sk(sk)->ep; | |
1481 | ||
cd4fcc70 TG |
1482 | /* Clean up any skbs sitting on the receive queue. */ |
1483 | data_was_unread = sctp_queue_purge_ulpevents(&sk->sk_receive_queue); | |
1484 | data_was_unread += sctp_queue_purge_ulpevents(&sctp_sk(sk)->pd_lobby); | |
1485 | ||
61c9fed4 | 1486 | /* Walk all associations on an endpoint. */ |
1da177e4 LT |
1487 | list_for_each_safe(pos, temp, &ep->asocs) { |
1488 | asoc = list_entry(pos, struct sctp_association, asocs); | |
1489 | ||
1490 | if (sctp_style(sk, TCP)) { | |
1491 | /* A closed association can still be in the list if | |
1492 | * it belongs to a TCP-style listening socket that is | |
1493 | * not yet accepted. If so, free it. If not, send an | |
1494 | * ABORT or SHUTDOWN based on the linger options. | |
1495 | */ | |
1496 | if (sctp_state(asoc, CLOSED)) { | |
1da177e4 | 1497 | sctp_association_free(asoc); |
b89498a1 VY |
1498 | continue; |
1499 | } | |
1500 | } | |
1da177e4 | 1501 | |
cd4fcc70 TG |
1502 | if (data_was_unread || !skb_queue_empty(&asoc->ulpq.lobby) || |
1503 | !skb_queue_empty(&asoc->ulpq.reasm) || | |
13228238 | 1504 | !skb_queue_empty(&asoc->ulpq.reasm_uo) || |
cd4fcc70 | 1505 | (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime)) { |
b9ac8672 SS |
1506 | struct sctp_chunk *chunk; |
1507 | ||
1508 | chunk = sctp_make_abort_user(asoc, NULL, 0); | |
068d8bd3 | 1509 | sctp_primitive_ABORT(net, asoc, chunk); |
b9ac8672 | 1510 | } else |
55e26eb9 | 1511 | sctp_primitive_SHUTDOWN(net, asoc, NULL); |
1da177e4 LT |
1512 | } |
1513 | ||
1da177e4 LT |
1514 | /* On a TCP-style socket, block for at most linger_time if set. */ |
1515 | if (sctp_style(sk, TCP) && timeout) | |
1516 | sctp_wait_for_close(sk, timeout); | |
1517 | ||
1518 | /* This will run the backlog queue. */ | |
048ed4b6 | 1519 | release_sock(sk); |
1da177e4 LT |
1520 | |
1521 | /* Supposedly, no process has access to the socket, but | |
1522 | * the net layers still may. | |
2d45a02d MRL |
1523 | * Also, sctp_destroy_sock() needs to be called with addr_wq_lock |
1524 | * held and that should be grabbed before socket lock. | |
1da177e4 | 1525 | */ |
2d45a02d | 1526 | spin_lock_bh(&net->sctp.addr_wq_lock); |
6dfe4b97 | 1527 | bh_lock_sock_nested(sk); |
1da177e4 LT |
1528 | |
1529 | /* Hold the sock, since sk_common_release() will put sock_put() | |
1530 | * and we have just a little more cleanup. | |
1531 | */ | |
1532 | sock_hold(sk); | |
1533 | sk_common_release(sk); | |
1534 | ||
5bc1d1b4 | 1535 | bh_unlock_sock(sk); |
2d45a02d | 1536 | spin_unlock_bh(&net->sctp.addr_wq_lock); |
1da177e4 LT |
1537 | |
1538 | sock_put(sk); | |
1539 | ||
1540 | SCTP_DBG_OBJCNT_DEC(sock); | |
1541 | } | |
1542 | ||
1543 | /* Handle EPIPE error. */ | |
1544 | static int sctp_error(struct sock *sk, int flags, int err) | |
1545 | { | |
1546 | if (err == -EPIPE) | |
1547 | err = sock_error(sk) ? : -EPIPE; | |
1548 | if (err == -EPIPE && !(flags & MSG_NOSIGNAL)) | |
1549 | send_sig(SIGPIPE, current, 0); | |
1550 | return err; | |
1551 | } | |
1552 | ||
1553 | /* API 3.1.3 sendmsg() - UDP Style Syntax | |
1554 | * | |
1555 | * An application uses sendmsg() and recvmsg() calls to transmit data to | |
1556 | * and receive data from its peer. | |
1557 | * | |
1558 | * ssize_t sendmsg(int socket, const struct msghdr *message, | |
1559 | * int flags); | |
1560 | * | |
1561 | * socket - the socket descriptor of the endpoint. | |
1562 | * message - pointer to the msghdr structure which contains a single | |
1563 | * user message and possibly some ancillary data. | |
1564 | * | |
1565 | * See Section 5 for complete description of the data | |
1566 | * structures. | |
1567 | * | |
1568 | * flags - flags sent or received with the user message, see Section | |
1569 | * 5 for complete description of the flags. | |
1570 | * | |
1571 | * Note: This function could use a rewrite especially when explicit | |
1572 | * connect support comes in. | |
1573 | */ | |
1574 | /* BUG: We do not implement the equivalent of sk_stream_wait_memory(). */ | |
1575 | ||
a05437ac XL |
1576 | static int sctp_msghdr_parse(const struct msghdr *msg, |
1577 | struct sctp_cmsgs *cmsgs); | |
1da177e4 | 1578 | |
204f817f XL |
1579 | static int sctp_sendmsg_parse(struct sock *sk, struct sctp_cmsgs *cmsgs, |
1580 | struct sctp_sndrcvinfo *srinfo, | |
1581 | const struct msghdr *msg, size_t msg_len) | |
1582 | { | |
1583 | __u16 sflags; | |
1584 | int err; | |
1585 | ||
1586 | if (sctp_sstate(sk, LISTENING) && sctp_style(sk, TCP)) | |
1587 | return -EPIPE; | |
1588 | ||
1589 | if (msg_len > sk->sk_sndbuf) | |
1590 | return -EMSGSIZE; | |
1591 | ||
1592 | memset(cmsgs, 0, sizeof(*cmsgs)); | |
1593 | err = sctp_msghdr_parse(msg, cmsgs); | |
1594 | if (err) { | |
1595 | pr_debug("%s: msghdr parse err:%x\n", __func__, err); | |
1596 | return err; | |
1597 | } | |
1598 | ||
1599 | memset(srinfo, 0, sizeof(*srinfo)); | |
1600 | if (cmsgs->srinfo) { | |
1601 | srinfo->sinfo_stream = cmsgs->srinfo->sinfo_stream; | |
1602 | srinfo->sinfo_flags = cmsgs->srinfo->sinfo_flags; | |
1603 | srinfo->sinfo_ppid = cmsgs->srinfo->sinfo_ppid; | |
1604 | srinfo->sinfo_context = cmsgs->srinfo->sinfo_context; | |
1605 | srinfo->sinfo_assoc_id = cmsgs->srinfo->sinfo_assoc_id; | |
1606 | srinfo->sinfo_timetolive = cmsgs->srinfo->sinfo_timetolive; | |
1607 | } | |
1608 | ||
1609 | if (cmsgs->sinfo) { | |
1610 | srinfo->sinfo_stream = cmsgs->sinfo->snd_sid; | |
1611 | srinfo->sinfo_flags = cmsgs->sinfo->snd_flags; | |
1612 | srinfo->sinfo_ppid = cmsgs->sinfo->snd_ppid; | |
1613 | srinfo->sinfo_context = cmsgs->sinfo->snd_context; | |
1614 | srinfo->sinfo_assoc_id = cmsgs->sinfo->snd_assoc_id; | |
1615 | } | |
1616 | ||
ed63afb8 XL |
1617 | if (cmsgs->prinfo) { |
1618 | srinfo->sinfo_timetolive = cmsgs->prinfo->pr_value; | |
1619 | SCTP_PR_SET_POLICY(srinfo->sinfo_flags, | |
1620 | cmsgs->prinfo->pr_policy); | |
1621 | } | |
1622 | ||
204f817f XL |
1623 | sflags = srinfo->sinfo_flags; |
1624 | if (!sflags && msg_len) | |
1625 | return 0; | |
1626 | ||
1627 | if (sctp_style(sk, TCP) && (sflags & (SCTP_EOF | SCTP_ABORT))) | |
1628 | return -EINVAL; | |
1629 | ||
1630 | if (((sflags & SCTP_EOF) && msg_len > 0) || | |
1631 | (!(sflags & (SCTP_EOF | SCTP_ABORT)) && msg_len == 0)) | |
1632 | return -EINVAL; | |
1633 | ||
1634 | if ((sflags & SCTP_ADDR_OVER) && !msg->msg_name) | |
1635 | return -EINVAL; | |
1636 | ||
1637 | return 0; | |
1638 | } | |
1639 | ||
2bfd80f9 XL |
1640 | static int sctp_sendmsg_new_asoc(struct sock *sk, __u16 sflags, |
1641 | struct sctp_cmsgs *cmsgs, | |
1642 | union sctp_addr *daddr, | |
1643 | struct sctp_transport **tp) | |
1644 | { | |
1645 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; | |
2bfd80f9 | 1646 | struct sctp_association *asoc; |
2c0dbaa0 | 1647 | struct cmsghdr *cmsg; |
4be4139f | 1648 | __be32 flowinfo = 0; |
9eda2d2d | 1649 | struct sctp_af *af; |
d98985dd | 1650 | int err; |
2bfd80f9 XL |
1651 | |
1652 | *tp = NULL; | |
1653 | ||
1654 | if (sflags & (SCTP_EOF | SCTP_ABORT)) | |
1655 | return -EINVAL; | |
1656 | ||
1657 | if (sctp_style(sk, TCP) && (sctp_sstate(sk, ESTABLISHED) || | |
1658 | sctp_sstate(sk, CLOSING))) | |
1659 | return -EADDRNOTAVAIL; | |
1660 | ||
9eda2d2d LT |
1661 | /* Label connection socket for first association 1-to-many |
1662 | * style for client sequence socket()->sendmsg(). This | |
1663 | * needs to be done before sctp_assoc_add_peer() as that will | |
1664 | * set up the initial packet that needs to account for any | |
1665 | * security ip options (CIPSO/CALIPSO) added to the packet. | |
1666 | */ | |
1667 | af = sctp_get_af_specific(daddr->sa.sa_family); | |
1668 | if (!af) | |
1669 | return -EINVAL; | |
1670 | err = security_sctp_bind_connect(sk, SCTP_SENDMSG_CONNECT, | |
1671 | (struct sockaddr *)daddr, | |
1672 | af->sockaddr_len); | |
1673 | if (err < 0) | |
1674 | return err; | |
1da177e4 | 1675 | |
f26f9951 XL |
1676 | err = sctp_connect_new_asoc(ep, daddr, cmsgs->init, tp); |
1677 | if (err) | |
1678 | return err; | |
1679 | asoc = (*tp)->asoc; | |
2bfd80f9 | 1680 | |
2c0dbaa0 XL |
1681 | if (!cmsgs->addrs_msg) |
1682 | return 0; | |
1683 | ||
4be4139f XL |
1684 | if (daddr->sa.sa_family == AF_INET6) |
1685 | flowinfo = daddr->v6.sin6_flowinfo; | |
1686 | ||
2c0dbaa0 XL |
1687 | /* sendv addr list parse */ |
1688 | for_each_cmsghdr(cmsg, cmsgs->addrs_msg) { | |
2c0dbaa0 XL |
1689 | union sctp_addr _daddr; |
1690 | int dlen; | |
1691 | ||
1692 | if (cmsg->cmsg_level != IPPROTO_SCTP || | |
1693 | (cmsg->cmsg_type != SCTP_DSTADDRV4 && | |
1694 | cmsg->cmsg_type != SCTP_DSTADDRV6)) | |
1695 | continue; | |
1696 | ||
1697 | daddr = &_daddr; | |
1698 | memset(daddr, 0, sizeof(*daddr)); | |
1699 | dlen = cmsg->cmsg_len - sizeof(struct cmsghdr); | |
1700 | if (cmsg->cmsg_type == SCTP_DSTADDRV4) { | |
d98985dd WY |
1701 | if (dlen < sizeof(struct in_addr)) { |
1702 | err = -EINVAL; | |
2c0dbaa0 | 1703 | goto free; |
d98985dd | 1704 | } |
2c0dbaa0 XL |
1705 | |
1706 | dlen = sizeof(struct in_addr); | |
1707 | daddr->v4.sin_family = AF_INET; | |
1708 | daddr->v4.sin_port = htons(asoc->peer.port); | |
1709 | memcpy(&daddr->v4.sin_addr, CMSG_DATA(cmsg), dlen); | |
1710 | } else { | |
d98985dd WY |
1711 | if (dlen < sizeof(struct in6_addr)) { |
1712 | err = -EINVAL; | |
2c0dbaa0 | 1713 | goto free; |
d98985dd | 1714 | } |
2c0dbaa0 XL |
1715 | |
1716 | dlen = sizeof(struct in6_addr); | |
4be4139f | 1717 | daddr->v6.sin6_flowinfo = flowinfo; |
2c0dbaa0 XL |
1718 | daddr->v6.sin6_family = AF_INET6; |
1719 | daddr->v6.sin6_port = htons(asoc->peer.port); | |
1720 | memcpy(&daddr->v6.sin6_addr, CMSG_DATA(cmsg), dlen); | |
1721 | } | |
2c0dbaa0 | 1722 | |
a64e59c7 XL |
1723 | err = sctp_connect_add_peer(asoc, daddr, sizeof(*daddr)); |
1724 | if (err) | |
2c0dbaa0 | 1725 | goto free; |
2c0dbaa0 XL |
1726 | } |
1727 | ||
2bfd80f9 XL |
1728 | return 0; |
1729 | ||
1730 | free: | |
1731 | sctp_association_free(asoc); | |
1732 | return err; | |
1733 | } | |
1734 | ||
c2666de1 XL |
1735 | static int sctp_sendmsg_check_sflags(struct sctp_association *asoc, |
1736 | __u16 sflags, struct msghdr *msg, | |
1737 | size_t msg_len) | |
1738 | { | |
1739 | struct sock *sk = asoc->base.sk; | |
1740 | struct net *net = sock_net(sk); | |
1741 | ||
1742 | if (sctp_state(asoc, CLOSED) && sctp_style(sk, TCP)) | |
1743 | return -EPIPE; | |
1744 | ||
49102805 XL |
1745 | if ((sflags & SCTP_SENDALL) && sctp_style(sk, UDP) && |
1746 | !sctp_state(asoc, ESTABLISHED)) | |
1747 | return 0; | |
1748 | ||
c2666de1 XL |
1749 | if (sflags & SCTP_EOF) { |
1750 | pr_debug("%s: shutting down association:%p\n", __func__, asoc); | |
1751 | sctp_primitive_SHUTDOWN(net, asoc, NULL); | |
1752 | ||
1753 | return 0; | |
1754 | } | |
1755 | ||
1756 | if (sflags & SCTP_ABORT) { | |
1757 | struct sctp_chunk *chunk; | |
1758 | ||
1759 | chunk = sctp_make_abort_user(asoc, msg, msg_len); | |
1760 | if (!chunk) | |
1761 | return -ENOMEM; | |
1762 | ||
1763 | pr_debug("%s: aborting association:%p\n", __func__, asoc); | |
1764 | sctp_primitive_ABORT(net, asoc, chunk); | |
901efe12 | 1765 | iov_iter_revert(&msg->msg_iter, msg_len); |
c2666de1 XL |
1766 | |
1767 | return 0; | |
1768 | } | |
1769 | ||
1770 | return 1; | |
1771 | } | |
1772 | ||
f84af331 XL |
1773 | static int sctp_sendmsg_to_asoc(struct sctp_association *asoc, |
1774 | struct msghdr *msg, size_t msg_len, | |
1775 | struct sctp_transport *transport, | |
1776 | struct sctp_sndrcvinfo *sinfo) | |
1777 | { | |
1778 | struct sock *sk = asoc->base.sk; | |
63d01330 | 1779 | struct sctp_sock *sp = sctp_sk(sk); |
f84af331 XL |
1780 | struct net *net = sock_net(sk); |
1781 | struct sctp_datamsg *datamsg; | |
1782 | bool wait_connect = false; | |
1783 | struct sctp_chunk *chunk; | |
1784 | long timeo; | |
1785 | int err; | |
1786 | ||
1787 | if (sinfo->sinfo_stream >= asoc->stream.outcnt) { | |
1788 | err = -EINVAL; | |
1789 | goto err; | |
1790 | } | |
1791 | ||
05364ca0 | 1792 | if (unlikely(!SCTP_SO(&asoc->stream, sinfo->sinfo_stream)->ext)) { |
f84af331 XL |
1793 | err = sctp_stream_init_ext(&asoc->stream, sinfo->sinfo_stream); |
1794 | if (err) | |
1795 | goto err; | |
1796 | } | |
1797 | ||
63d01330 | 1798 | if (sp->disable_fragments && msg_len > asoc->frag_point) { |
f84af331 XL |
1799 | err = -EMSGSIZE; |
1800 | goto err; | |
1801 | } | |
1802 | ||
2521680e | 1803 | if (asoc->pmtu_pending) { |
63d01330 MRL |
1804 | if (sp->param_flags & SPP_PMTUD_ENABLE) |
1805 | sctp_assoc_sync_pmtu(asoc); | |
2521680e MRL |
1806 | asoc->pmtu_pending = 0; |
1807 | } | |
0aee4c25 | 1808 | |
cd305c74 | 1809 | if (sctp_wspace(asoc) < (int)msg_len) |
0aee4c25 NH |
1810 | sctp_prsctp_prune(asoc, sinfo, msg_len - sctp_wspace(asoc)); |
1811 | ||
1033990a XL |
1812 | if (sk_under_memory_pressure(sk)) |
1813 | sk_mem_reclaim(sk); | |
1814 | ||
1815 | if (sctp_wspace(asoc) <= 0 || !sk_wmem_schedule(sk, msg_len)) { | |
0aee4c25 NH |
1816 | timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT); |
1817 | err = sctp_wait_for_sndbuf(asoc, &timeo, msg_len); | |
1818 | if (err) | |
1819 | goto err; | |
1820 | } | |
1821 | ||
f84af331 XL |
1822 | if (sctp_state(asoc, CLOSED)) { |
1823 | err = sctp_primitive_ASSOCIATE(net, asoc, NULL); | |
1824 | if (err) | |
1825 | goto err; | |
1826 | ||
e55f4b8b | 1827 | if (asoc->ep->intl_enable) { |
f84af331 XL |
1828 | timeo = sock_sndtimeo(sk, 0); |
1829 | err = sctp_wait_for_connect(asoc, &timeo); | |
c863850c XL |
1830 | if (err) { |
1831 | err = -ESRCH; | |
f84af331 | 1832 | goto err; |
c863850c | 1833 | } |
f84af331 XL |
1834 | } else { |
1835 | wait_connect = true; | |
1836 | } | |
1837 | ||
1838 | pr_debug("%s: we associated primitively\n", __func__); | |
1839 | } | |
1840 | ||
f84af331 XL |
1841 | datamsg = sctp_datamsg_from_user(asoc, sinfo, &msg->msg_iter); |
1842 | if (IS_ERR(datamsg)) { | |
1843 | err = PTR_ERR(datamsg); | |
1844 | goto err; | |
1845 | } | |
1846 | ||
1847 | asoc->force_delay = !!(msg->msg_flags & MSG_MORE); | |
1848 | ||
1849 | list_for_each_entry(chunk, &datamsg->chunks, frag_list) { | |
1850 | sctp_chunk_hold(chunk); | |
1851 | sctp_set_owner_w(chunk); | |
1852 | chunk->transport = transport; | |
1853 | } | |
1854 | ||
1855 | err = sctp_primitive_SEND(net, asoc, datamsg); | |
1856 | if (err) { | |
1857 | sctp_datamsg_free(datamsg); | |
1858 | goto err; | |
1859 | } | |
1860 | ||
1861 | pr_debug("%s: we sent primitively\n", __func__); | |
1862 | ||
1863 | sctp_datamsg_put(datamsg); | |
1864 | ||
1865 | if (unlikely(wait_connect)) { | |
1866 | timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT); | |
1867 | sctp_wait_for_connect(asoc, &timeo); | |
1868 | } | |
1869 | ||
1870 | err = msg_len; | |
1871 | ||
1872 | err: | |
1873 | return err; | |
1874 | } | |
1875 | ||
becef9b1 XL |
1876 | static union sctp_addr *sctp_sendmsg_get_daddr(struct sock *sk, |
1877 | const struct msghdr *msg, | |
1878 | struct sctp_cmsgs *cmsgs) | |
1879 | { | |
1880 | union sctp_addr *daddr = NULL; | |
1881 | int err; | |
1882 | ||
1883 | if (!sctp_style(sk, UDP_HIGH_BANDWIDTH) && msg->msg_name) { | |
1884 | int len = msg->msg_namelen; | |
1885 | ||
1886 | if (len > sizeof(*daddr)) | |
1887 | len = sizeof(*daddr); | |
1888 | ||
1889 | daddr = (union sctp_addr *)msg->msg_name; | |
1890 | ||
1891 | err = sctp_verify_addr(sk, daddr, len); | |
1892 | if (err) | |
1893 | return ERR_PTR(err); | |
1894 | } | |
1895 | ||
1896 | return daddr; | |
1897 | } | |
1898 | ||
d42cb06e XL |
1899 | static void sctp_sendmsg_update_sinfo(struct sctp_association *asoc, |
1900 | struct sctp_sndrcvinfo *sinfo, | |
1901 | struct sctp_cmsgs *cmsgs) | |
1902 | { | |
1903 | if (!cmsgs->srinfo && !cmsgs->sinfo) { | |
1904 | sinfo->sinfo_stream = asoc->default_stream; | |
1905 | sinfo->sinfo_ppid = asoc->default_ppid; | |
1906 | sinfo->sinfo_context = asoc->default_context; | |
1907 | sinfo->sinfo_assoc_id = sctp_assoc2id(asoc); | |
ed63afb8 XL |
1908 | |
1909 | if (!cmsgs->prinfo) | |
1910 | sinfo->sinfo_flags = asoc->default_flags; | |
d42cb06e XL |
1911 | } |
1912 | ||
ed63afb8 | 1913 | if (!cmsgs->srinfo && !cmsgs->prinfo) |
d42cb06e | 1914 | sinfo->sinfo_timetolive = asoc->default_timetolive; |
3ff547c0 XL |
1915 | |
1916 | if (cmsgs->authinfo) { | |
1917 | /* Reuse sinfo_tsn to indicate that authinfo was set and | |
1918 | * sinfo_ssn to save the keyid on tx path. | |
1919 | */ | |
1920 | sinfo->sinfo_tsn = 1; | |
1921 | sinfo->sinfo_ssn = cmsgs->authinfo->auth_keynumber; | |
1922 | } | |
d42cb06e XL |
1923 | } |
1924 | ||
1b784140 | 1925 | static int sctp_sendmsg(struct sock *sk, struct msghdr *msg, size_t msg_len) |
1da177e4 | 1926 | { |
204f817f | 1927 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
8e87c6eb | 1928 | struct sctp_transport *transport = NULL; |
204f817f | 1929 | struct sctp_sndrcvinfo _sinfo, *sinfo; |
ba59fb02 | 1930 | struct sctp_association *asoc, *tmp; |
007b7e18 | 1931 | struct sctp_cmsgs cmsgs; |
becef9b1 | 1932 | union sctp_addr *daddr; |
007b7e18 XL |
1933 | bool new = false; |
1934 | __u16 sflags; | |
63b94938 | 1935 | int err; |
1da177e4 | 1936 | |
204f817f XL |
1937 | /* Parse and get snd_info */ |
1938 | err = sctp_sendmsg_parse(sk, &cmsgs, &_sinfo, msg, msg_len); | |
1939 | if (err) | |
007b7e18 | 1940 | goto out; |
1da177e4 | 1941 | |
204f817f | 1942 | sinfo = &_sinfo; |
007b7e18 | 1943 | sflags = sinfo->sinfo_flags; |
1da177e4 | 1944 | |
becef9b1 XL |
1945 | /* Get daddr from msg */ |
1946 | daddr = sctp_sendmsg_get_daddr(sk, msg, &cmsgs); | |
1947 | if (IS_ERR(daddr)) { | |
1948 | err = PTR_ERR(daddr); | |
007b7e18 | 1949 | goto out; |
1da177e4 LT |
1950 | } |
1951 | ||
048ed4b6 | 1952 | lock_sock(sk); |
1da177e4 | 1953 | |
49102805 XL |
1954 | /* SCTP_SENDALL process */ |
1955 | if ((sflags & SCTP_SENDALL) && sctp_style(sk, UDP)) { | |
ba59fb02 | 1956 | list_for_each_entry_safe(asoc, tmp, &ep->asocs, asocs) { |
49102805 XL |
1957 | err = sctp_sendmsg_check_sflags(asoc, sflags, msg, |
1958 | msg_len); | |
1959 | if (err == 0) | |
1960 | continue; | |
1961 | if (err < 0) | |
1962 | goto out_unlock; | |
1963 | ||
1964 | sctp_sendmsg_update_sinfo(asoc, sinfo, &cmsgs); | |
1965 | ||
1966 | err = sctp_sendmsg_to_asoc(asoc, msg, msg_len, | |
1967 | NULL, sinfo); | |
1968 | if (err < 0) | |
1969 | goto out_unlock; | |
1970 | ||
1971 | iov_iter_revert(&msg->msg_iter, err); | |
1972 | } | |
1973 | ||
1974 | goto out_unlock; | |
1975 | } | |
1976 | ||
0a3920d2 | 1977 | /* Get and check or create asoc */ |
becef9b1 | 1978 | if (daddr) { |
becef9b1 | 1979 | asoc = sctp_endpoint_lookup_assoc(ep, daddr, &transport); |
0a3920d2 XL |
1980 | if (asoc) { |
1981 | err = sctp_sendmsg_check_sflags(asoc, sflags, msg, | |
1982 | msg_len); | |
1983 | if (err <= 0) | |
1984 | goto out_unlock; | |
1985 | } else { | |
1986 | err = sctp_sendmsg_new_asoc(sk, sflags, &cmsgs, daddr, | |
1987 | &transport); | |
1988 | if (err) | |
1989 | goto out_unlock; | |
1990 | ||
1991 | asoc = transport->asoc; | |
1992 | new = true; | |
1993 | } | |
1994 | ||
1995 | if (!sctp_style(sk, TCP) && !(sflags & SCTP_ADDR_OVER)) | |
1996 | transport = NULL; | |
1da177e4 | 1997 | } else { |
007b7e18 | 1998 | asoc = sctp_id2assoc(sk, sinfo->sinfo_assoc_id); |
1da177e4 LT |
1999 | if (!asoc) { |
2000 | err = -EPIPE; | |
2001 | goto out_unlock; | |
2002 | } | |
1da177e4 | 2003 | |
007b7e18 | 2004 | err = sctp_sendmsg_check_sflags(asoc, sflags, msg, msg_len); |
c2666de1 | 2005 | if (err <= 0) |
1da177e4 | 2006 | goto out_unlock; |
1da177e4 LT |
2007 | } |
2008 | ||
d42cb06e XL |
2009 | /* Update snd_info with the asoc */ |
2010 | sctp_sendmsg_update_sinfo(asoc, sinfo, &cmsgs); | |
1da177e4 | 2011 | |
f84af331 | 2012 | /* Send msg to the asoc */ |
8e87c6eb | 2013 | err = sctp_sendmsg_to_asoc(asoc, msg, msg_len, transport, sinfo); |
007b7e18 | 2014 | if (err < 0 && err != -ESRCH && new) |
1da177e4 | 2015 | sctp_association_free(asoc); |
8e87c6eb | 2016 | |
1da177e4 | 2017 | out_unlock: |
048ed4b6 | 2018 | release_sock(sk); |
007b7e18 | 2019 | out: |
f84af331 | 2020 | return sctp_error(sk, msg->msg_flags, err); |
1da177e4 LT |
2021 | } |
2022 | ||
2023 | /* This is an extended version of skb_pull() that removes the data from the | |
2024 | * start of a skb even when data is spread across the list of skb's in the | |
2025 | * frag_list. len specifies the total amount of data that needs to be removed. | |
2026 | * when 'len' bytes could be removed from the skb, it returns 0. | |
2027 | * If 'len' exceeds the total skb length, it returns the no. of bytes that | |
2028 | * could not be removed. | |
2029 | */ | |
2030 | static int sctp_skb_pull(struct sk_buff *skb, int len) | |
2031 | { | |
2032 | struct sk_buff *list; | |
2033 | int skb_len = skb_headlen(skb); | |
2034 | int rlen; | |
2035 | ||
2036 | if (len <= skb_len) { | |
2037 | __skb_pull(skb, len); | |
2038 | return 0; | |
2039 | } | |
2040 | len -= skb_len; | |
2041 | __skb_pull(skb, skb_len); | |
2042 | ||
1b003be3 | 2043 | skb_walk_frags(skb, list) { |
1da177e4 LT |
2044 | rlen = sctp_skb_pull(list, len); |
2045 | skb->len -= (len-rlen); | |
2046 | skb->data_len -= (len-rlen); | |
2047 | ||
2048 | if (!rlen) | |
2049 | return 0; | |
2050 | ||
2051 | len = rlen; | |
2052 | } | |
2053 | ||
2054 | return len; | |
2055 | } | |
2056 | ||
2057 | /* API 3.1.3 recvmsg() - UDP Style Syntax | |
2058 | * | |
2059 | * ssize_t recvmsg(int socket, struct msghdr *message, | |
2060 | * int flags); | |
2061 | * | |
2062 | * socket - the socket descriptor of the endpoint. | |
2063 | * message - pointer to the msghdr structure which contains a single | |
2064 | * user message and possibly some ancillary data. | |
2065 | * | |
2066 | * See Section 5 for complete description of the data | |
2067 | * structures. | |
2068 | * | |
2069 | * flags - flags sent or received with the user message, see Section | |
2070 | * 5 for complete description of the flags. | |
2071 | */ | |
1b784140 YX |
2072 | static int sctp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, |
2073 | int noblock, int flags, int *addr_len) | |
1da177e4 LT |
2074 | { |
2075 | struct sctp_ulpevent *event = NULL; | |
2076 | struct sctp_sock *sp = sctp_sk(sk); | |
1f45f78f | 2077 | struct sk_buff *skb, *head_skb; |
1da177e4 LT |
2078 | int copied; |
2079 | int err = 0; | |
2080 | int skb_len; | |
2081 | ||
bb33381d DB |
2082 | pr_debug("%s: sk:%p, msghdr:%p, len:%zd, noblock:%d, flags:0x%x, " |
2083 | "addr_len:%p)\n", __func__, sk, msg, len, noblock, flags, | |
2084 | addr_len); | |
1da177e4 | 2085 | |
048ed4b6 | 2086 | lock_sock(sk); |
1da177e4 | 2087 | |
e5b13f34 | 2088 | if (sctp_style(sk, TCP) && !sctp_sstate(sk, ESTABLISHED) && |
e0878694 | 2089 | !sctp_sstate(sk, CLOSING) && !sctp_sstate(sk, CLOSED)) { |
1da177e4 LT |
2090 | err = -ENOTCONN; |
2091 | goto out; | |
2092 | } | |
2093 | ||
2094 | skb = sctp_skb_recv_datagram(sk, flags, noblock, &err); | |
2095 | if (!skb) | |
2096 | goto out; | |
2097 | ||
2098 | /* Get the total length of the skb including any skb's in the | |
2099 | * frag_list. | |
2100 | */ | |
2101 | skb_len = skb->len; | |
2102 | ||
2103 | copied = skb_len; | |
2104 | if (copied > len) | |
2105 | copied = len; | |
2106 | ||
51f3d02b | 2107 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
1da177e4 LT |
2108 | |
2109 | event = sctp_skb2event(skb); | |
2110 | ||
2111 | if (err) | |
2112 | goto out_free; | |
2113 | ||
1f45f78f MRL |
2114 | if (event->chunk && event->chunk->head_skb) |
2115 | head_skb = event->chunk->head_skb; | |
2116 | else | |
2117 | head_skb = skb; | |
2118 | sock_recv_ts_and_drops(msg, sk, head_skb); | |
1da177e4 LT |
2119 | if (sctp_ulpevent_is_notification(event)) { |
2120 | msg->msg_flags |= MSG_NOTIFICATION; | |
2121 | sp->pf->event_msgname(event, msg->msg_name, addr_len); | |
2122 | } else { | |
1f45f78f | 2123 | sp->pf->skb_msgname(head_skb, msg->msg_name, addr_len); |
1da177e4 LT |
2124 | } |
2125 | ||
2347c80f GOV |
2126 | /* Check if we allow SCTP_NXTINFO. */ |
2127 | if (sp->recvnxtinfo) | |
2128 | sctp_ulpevent_read_nxtinfo(event, msg, sk); | |
0d3a421d GOV |
2129 | /* Check if we allow SCTP_RCVINFO. */ |
2130 | if (sp->recvrcvinfo) | |
2131 | sctp_ulpevent_read_rcvinfo(event, msg); | |
1da177e4 | 2132 | /* Check if we allow SCTP_SNDRCVINFO. */ |
2cc0eeb6 | 2133 | if (sctp_ulpevent_type_enabled(sp->subscribe, SCTP_DATA_IO_EVENT)) |
1da177e4 | 2134 | sctp_ulpevent_read_sndrcvinfo(event, msg); |
0d3a421d | 2135 | |
1da177e4 LT |
2136 | err = copied; |
2137 | ||
2138 | /* If skb's length exceeds the user's buffer, update the skb and | |
2139 | * push it back to the receive_queue so that the next call to | |
2140 | * recvmsg() will return the remaining data. Don't set MSG_EOR. | |
2141 | */ | |
2142 | if (skb_len > copied) { | |
2143 | msg->msg_flags &= ~MSG_EOR; | |
2144 | if (flags & MSG_PEEK) | |
2145 | goto out_free; | |
2146 | sctp_skb_pull(skb, copied); | |
2147 | skb_queue_head(&sk->sk_receive_queue, skb); | |
2148 | ||
362d5204 DB |
2149 | /* When only partial message is copied to the user, increase |
2150 | * rwnd by that amount. If all the data in the skb is read, | |
2151 | * rwnd is updated when the event is freed. | |
2152 | */ | |
2153 | if (!sctp_ulpevent_is_notification(event)) | |
2154 | sctp_assoc_rwnd_increase(event->asoc, copied); | |
1da177e4 LT |
2155 | goto out; |
2156 | } else if ((event->msg_flags & MSG_NOTIFICATION) || | |
2157 | (event->msg_flags & MSG_EOR)) | |
2158 | msg->msg_flags |= MSG_EOR; | |
2159 | else | |
2160 | msg->msg_flags &= ~MSG_EOR; | |
2161 | ||
2162 | out_free: | |
2163 | if (flags & MSG_PEEK) { | |
2164 | /* Release the skb reference acquired after peeking the skb in | |
2165 | * sctp_skb_recv_datagram(). | |
2166 | */ | |
2167 | kfree_skb(skb); | |
2168 | } else { | |
2169 | /* Free the event which includes releasing the reference to | |
2170 | * the owner of the skb, freeing the skb and updating the | |
2171 | * rwnd. | |
2172 | */ | |
2173 | sctp_ulpevent_free(event); | |
2174 | } | |
2175 | out: | |
048ed4b6 | 2176 | release_sock(sk); |
1da177e4 LT |
2177 | return err; |
2178 | } | |
2179 | ||
2180 | /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS) | |
2181 | * | |
2182 | * This option is a on/off flag. If enabled no SCTP message | |
2183 | * fragmentation will be performed. Instead if a message being sent | |
2184 | * exceeds the current PMTU size, the message will NOT be sent and | |
2185 | * instead a error will be indicated to the user. | |
2186 | */ | |
2187 | static int sctp_setsockopt_disable_fragments(struct sock *sk, | |
b7058842 DM |
2188 | char __user *optval, |
2189 | unsigned int optlen) | |
1da177e4 LT |
2190 | { |
2191 | int val; | |
2192 | ||
2193 | if (optlen < sizeof(int)) | |
2194 | return -EINVAL; | |
2195 | ||
2196 | if (get_user(val, (int __user *)optval)) | |
2197 | return -EFAULT; | |
2198 | ||
2199 | sctp_sk(sk)->disable_fragments = (val == 0) ? 0 : 1; | |
2200 | ||
2201 | return 0; | |
2202 | } | |
2203 | ||
2204 | static int sctp_setsockopt_events(struct sock *sk, char __user *optval, | |
b7058842 | 2205 | unsigned int optlen) |
1da177e4 | 2206 | { |
2cc0eeb6 XL |
2207 | struct sctp_event_subscribe subscribe; |
2208 | __u8 *sn_type = (__u8 *)&subscribe; | |
2209 | struct sctp_sock *sp = sctp_sk(sk); | |
a1e3a059 | 2210 | struct sctp_association *asoc; |
2cc0eeb6 | 2211 | int i; |
94912301 | 2212 | |
7e8616d8 | 2213 | if (optlen > sizeof(struct sctp_event_subscribe)) |
1da177e4 | 2214 | return -EINVAL; |
2cc0eeb6 XL |
2215 | |
2216 | if (copy_from_user(&subscribe, optval, optlen)) | |
1da177e4 | 2217 | return -EFAULT; |
94912301 | 2218 | |
2cc0eeb6 XL |
2219 | for (i = 0; i < optlen; i++) |
2220 | sctp_ulpevent_type_set(&sp->subscribe, SCTP_SN_TYPE_BASE + i, | |
2221 | sn_type[i]); | |
2222 | ||
a1e3a059 XL |
2223 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) |
2224 | asoc->subscribe = sctp_sk(sk)->subscribe; | |
2225 | ||
bbbea41d | 2226 | /* At the time when a user app subscribes to SCTP_SENDER_DRY_EVENT, |
94912301 WY |
2227 | * if there is no data to be sent or retransmit, the stack will |
2228 | * immediately send up this notification. | |
2229 | */ | |
2cc0eeb6 | 2230 | if (sctp_ulpevent_type_enabled(sp->subscribe, SCTP_SENDER_DRY_EVENT)) { |
2cc0eeb6 | 2231 | struct sctp_ulpevent *event; |
94912301 | 2232 | |
a1e3a059 | 2233 | asoc = sctp_id2assoc(sk, 0); |
94912301 WY |
2234 | if (asoc && sctp_outq_is_empty(&asoc->outqueue)) { |
2235 | event = sctp_ulpevent_make_sender_dry_event(asoc, | |
2e83acb9 | 2236 | GFP_USER | __GFP_NOWARN); |
94912301 WY |
2237 | if (!event) |
2238 | return -ENOMEM; | |
2239 | ||
9162e0ed | 2240 | asoc->stream.si->enqueue_event(&asoc->ulpq, event); |
94912301 WY |
2241 | } |
2242 | } | |
2243 | ||
1da177e4 LT |
2244 | return 0; |
2245 | } | |
2246 | ||
2247 | /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE) | |
2248 | * | |
2249 | * This socket option is applicable to the UDP-style socket only. When | |
2250 | * set it will cause associations that are idle for more than the | |
2251 | * specified number of seconds to automatically close. An association | |
2252 | * being idle is defined an association that has NOT sent or received | |
2253 | * user data. The special value of '0' indicates that no automatic | |
2254 | * close of any associations should be performed. The option expects an | |
2255 | * integer defining the number of seconds of idle time before an | |
2256 | * association is closed. | |
2257 | */ | |
2258 | static int sctp_setsockopt_autoclose(struct sock *sk, char __user *optval, | |
b7058842 | 2259 | unsigned int optlen) |
1da177e4 LT |
2260 | { |
2261 | struct sctp_sock *sp = sctp_sk(sk); | |
9f70f46b | 2262 | struct net *net = sock_net(sk); |
1da177e4 LT |
2263 | |
2264 | /* Applicable to UDP-style socket only */ | |
2265 | if (sctp_style(sk, TCP)) | |
2266 | return -EOPNOTSUPP; | |
2267 | if (optlen != sizeof(int)) | |
2268 | return -EINVAL; | |
2269 | if (copy_from_user(&sp->autoclose, optval, optlen)) | |
2270 | return -EFAULT; | |
2271 | ||
9f70f46b NH |
2272 | if (sp->autoclose > net->sctp.max_autoclose) |
2273 | sp->autoclose = net->sctp.max_autoclose; | |
2274 | ||
1da177e4 LT |
2275 | return 0; |
2276 | } | |
2277 | ||
2278 | /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS) | |
2279 | * | |
2280 | * Applications can enable or disable heartbeats for any peer address of | |
2281 | * an association, modify an address's heartbeat interval, force a | |
2282 | * heartbeat to be sent immediately, and adjust the address's maximum | |
2283 | * number of retransmissions sent before an address is considered | |
2284 | * unreachable. The following structure is used to access and modify an | |
2285 | * address's parameters: | |
2286 | * | |
2287 | * struct sctp_paddrparams { | |
52ccb8e9 FF |
2288 | * sctp_assoc_t spp_assoc_id; |
2289 | * struct sockaddr_storage spp_address; | |
2290 | * uint32_t spp_hbinterval; | |
2291 | * uint16_t spp_pathmaxrxt; | |
2292 | * uint32_t spp_pathmtu; | |
2293 | * uint32_t spp_sackdelay; | |
2294 | * uint32_t spp_flags; | |
0b0dce7a XL |
2295 | * uint32_t spp_ipv6_flowlabel; |
2296 | * uint8_t spp_dscp; | |
52ccb8e9 FF |
2297 | * }; |
2298 | * | |
2299 | * spp_assoc_id - (one-to-many style socket) This is filled in the | |
2300 | * application, and identifies the association for | |
2301 | * this query. | |
1da177e4 LT |
2302 | * spp_address - This specifies which address is of interest. |
2303 | * spp_hbinterval - This contains the value of the heartbeat interval, | |
52ccb8e9 FF |
2304 | * in milliseconds. If a value of zero |
2305 | * is present in this field then no changes are to | |
2306 | * be made to this parameter. | |
1da177e4 LT |
2307 | * spp_pathmaxrxt - This contains the maximum number of |
2308 | * retransmissions before this address shall be | |
52ccb8e9 FF |
2309 | * considered unreachable. If a value of zero |
2310 | * is present in this field then no changes are to | |
2311 | * be made to this parameter. | |
2312 | * spp_pathmtu - When Path MTU discovery is disabled the value | |
2313 | * specified here will be the "fixed" path mtu. | |
2314 | * Note that if the spp_address field is empty | |
2315 | * then all associations on this address will | |
2316 | * have this fixed path mtu set upon them. | |
2317 | * | |
2318 | * spp_sackdelay - When delayed sack is enabled, this value specifies | |
2319 | * the number of milliseconds that sacks will be delayed | |
2320 | * for. This value will apply to all addresses of an | |
2321 | * association if the spp_address field is empty. Note | |
2322 | * also, that if delayed sack is enabled and this | |
2323 | * value is set to 0, no change is made to the last | |
2324 | * recorded delayed sack timer value. | |
2325 | * | |
2326 | * spp_flags - These flags are used to control various features | |
2327 | * on an association. The flag field may contain | |
2328 | * zero or more of the following options. | |
2329 | * | |
2330 | * SPP_HB_ENABLE - Enable heartbeats on the | |
2331 | * specified address. Note that if the address | |
2332 | * field is empty all addresses for the association | |
2333 | * have heartbeats enabled upon them. | |
2334 | * | |
2335 | * SPP_HB_DISABLE - Disable heartbeats on the | |
2336 | * speicifed address. Note that if the address | |
2337 | * field is empty all addresses for the association | |
2338 | * will have their heartbeats disabled. Note also | |
2339 | * that SPP_HB_ENABLE and SPP_HB_DISABLE are | |
2340 | * mutually exclusive, only one of these two should | |
2341 | * be specified. Enabling both fields will have | |
2342 | * undetermined results. | |
2343 | * | |
2344 | * SPP_HB_DEMAND - Request a user initiated heartbeat | |
2345 | * to be made immediately. | |
2346 | * | |
bdf3092a VY |
2347 | * SPP_HB_TIME_IS_ZERO - Specify's that the time for |
2348 | * heartbeat delayis to be set to the value of 0 | |
2349 | * milliseconds. | |
2350 | * | |
52ccb8e9 FF |
2351 | * SPP_PMTUD_ENABLE - This field will enable PMTU |
2352 | * discovery upon the specified address. Note that | |
2353 | * if the address feild is empty then all addresses | |
2354 | * on the association are effected. | |
2355 | * | |
2356 | * SPP_PMTUD_DISABLE - This field will disable PMTU | |
2357 | * discovery upon the specified address. Note that | |
2358 | * if the address feild is empty then all addresses | |
2359 | * on the association are effected. Not also that | |
2360 | * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually | |
2361 | * exclusive. Enabling both will have undetermined | |
2362 | * results. | |
2363 | * | |
2364 | * SPP_SACKDELAY_ENABLE - Setting this flag turns | |
2365 | * on delayed sack. The time specified in spp_sackdelay | |
2366 | * is used to specify the sack delay for this address. Note | |
2367 | * that if spp_address is empty then all addresses will | |
2368 | * enable delayed sack and take on the sack delay | |
2369 | * value specified in spp_sackdelay. | |
2370 | * SPP_SACKDELAY_DISABLE - Setting this flag turns | |
2371 | * off delayed sack. If the spp_address field is blank then | |
2372 | * delayed sack is disabled for the entire association. Note | |
2373 | * also that this field is mutually exclusive to | |
2374 | * SPP_SACKDELAY_ENABLE, setting both will have undefined | |
2375 | * results. | |
0b0dce7a XL |
2376 | * |
2377 | * SPP_IPV6_FLOWLABEL: Setting this flag enables the | |
2378 | * setting of the IPV6 flow label value. The value is | |
2379 | * contained in the spp_ipv6_flowlabel field. | |
2380 | * Upon retrieval, this flag will be set to indicate that | |
2381 | * the spp_ipv6_flowlabel field has a valid value returned. | |
2382 | * If a specific destination address is set (in the | |
2383 | * spp_address field), then the value returned is that of | |
2384 | * the address. If just an association is specified (and | |
2385 | * no address), then the association's default flow label | |
2386 | * is returned. If neither an association nor a destination | |
2387 | * is specified, then the socket's default flow label is | |
2388 | * returned. For non-IPv6 sockets, this flag will be left | |
2389 | * cleared. | |
2390 | * | |
2391 | * SPP_DSCP: Setting this flag enables the setting of the | |
2392 | * Differentiated Services Code Point (DSCP) value | |
2393 | * associated with either the association or a specific | |
2394 | * address. The value is obtained in the spp_dscp field. | |
2395 | * Upon retrieval, this flag will be set to indicate that | |
2396 | * the spp_dscp field has a valid value returned. If a | |
2397 | * specific destination address is set when called (in the | |
2398 | * spp_address field), then that specific destination | |
2399 | * address's DSCP value is returned. If just an association | |
2400 | * is specified, then the association's default DSCP is | |
2401 | * returned. If neither an association nor a destination is | |
2402 | * specified, then the socket's default DSCP is returned. | |
2403 | * | |
2404 | * spp_ipv6_flowlabel | |
2405 | * - This field is used in conjunction with the | |
2406 | * SPP_IPV6_FLOWLABEL flag and contains the IPv6 flow label. | |
2407 | * The 20 least significant bits are used for the flow | |
2408 | * label. This setting has precedence over any IPv6-layer | |
2409 | * setting. | |
2410 | * | |
2411 | * spp_dscp - This field is used in conjunction with the SPP_DSCP flag | |
2412 | * and contains the DSCP. The 6 most significant bits are | |
2413 | * used for the DSCP. This setting has precedence over any | |
2414 | * IPv4- or IPv6- layer setting. | |
1da177e4 | 2415 | */ |
16164366 AB |
2416 | static int sctp_apply_peer_addr_params(struct sctp_paddrparams *params, |
2417 | struct sctp_transport *trans, | |
2418 | struct sctp_association *asoc, | |
2419 | struct sctp_sock *sp, | |
2420 | int hb_change, | |
2421 | int pmtud_change, | |
2422 | int sackdelay_change) | |
52ccb8e9 FF |
2423 | { |
2424 | int error; | |
2425 | ||
2426 | if (params->spp_flags & SPP_HB_DEMAND && trans) { | |
4e7696d9 XL |
2427 | error = sctp_primitive_REQUESTHEARTBEAT(trans->asoc->base.net, |
2428 | trans->asoc, trans); | |
52ccb8e9 FF |
2429 | if (error) |
2430 | return error; | |
2431 | } | |
2432 | ||
bdf3092a VY |
2433 | /* Note that unless the spp_flag is set to SPP_HB_ENABLE the value of |
2434 | * this field is ignored. Note also that a value of zero indicates | |
2435 | * the current setting should be left unchanged. | |
2436 | */ | |
2437 | if (params->spp_flags & SPP_HB_ENABLE) { | |
2438 | ||
2439 | /* Re-zero the interval if the SPP_HB_TIME_IS_ZERO is | |
2440 | * set. This lets us use 0 value when this flag | |
2441 | * is set. | |
2442 | */ | |
2443 | if (params->spp_flags & SPP_HB_TIME_IS_ZERO) | |
2444 | params->spp_hbinterval = 0; | |
2445 | ||
2446 | if (params->spp_hbinterval || | |
2447 | (params->spp_flags & SPP_HB_TIME_IS_ZERO)) { | |
2448 | if (trans) { | |
2449 | trans->hbinterval = | |
2450 | msecs_to_jiffies(params->spp_hbinterval); | |
2451 | } else if (asoc) { | |
2452 | asoc->hbinterval = | |
2453 | msecs_to_jiffies(params->spp_hbinterval); | |
2454 | } else { | |
2455 | sp->hbinterval = params->spp_hbinterval; | |
2456 | } | |
52ccb8e9 FF |
2457 | } |
2458 | } | |
2459 | ||
2460 | if (hb_change) { | |
2461 | if (trans) { | |
2462 | trans->param_flags = | |
2463 | (trans->param_flags & ~SPP_HB) | hb_change; | |
2464 | } else if (asoc) { | |
2465 | asoc->param_flags = | |
2466 | (asoc->param_flags & ~SPP_HB) | hb_change; | |
2467 | } else { | |
2468 | sp->param_flags = | |
2469 | (sp->param_flags & ~SPP_HB) | hb_change; | |
2470 | } | |
2471 | } | |
2472 | ||
bdf3092a VY |
2473 | /* When Path MTU discovery is disabled the value specified here will |
2474 | * be the "fixed" path mtu (i.e. the value of the spp_flags field must | |
2475 | * include the flag SPP_PMTUD_DISABLE for this field to have any | |
2476 | * effect). | |
2477 | */ | |
2478 | if ((params->spp_flags & SPP_PMTUD_DISABLE) && params->spp_pathmtu) { | |
52ccb8e9 FF |
2479 | if (trans) { |
2480 | trans->pathmtu = params->spp_pathmtu; | |
3ebfdf08 | 2481 | sctp_assoc_sync_pmtu(asoc); |
52ccb8e9 | 2482 | } else if (asoc) { |
c4b2893d | 2483 | sctp_assoc_set_pmtu(asoc, params->spp_pathmtu); |
52ccb8e9 FF |
2484 | } else { |
2485 | sp->pathmtu = params->spp_pathmtu; | |
2486 | } | |
2487 | } | |
2488 | ||
2489 | if (pmtud_change) { | |
2490 | if (trans) { | |
2491 | int update = (trans->param_flags & SPP_PMTUD_DISABLE) && | |
2492 | (params->spp_flags & SPP_PMTUD_ENABLE); | |
2493 | trans->param_flags = | |
2494 | (trans->param_flags & ~SPP_PMTUD) | pmtud_change; | |
2495 | if (update) { | |
9914ae3c | 2496 | sctp_transport_pmtu(trans, sctp_opt2sk(sp)); |
3ebfdf08 | 2497 | sctp_assoc_sync_pmtu(asoc); |
52ccb8e9 FF |
2498 | } |
2499 | } else if (asoc) { | |
2500 | asoc->param_flags = | |
2501 | (asoc->param_flags & ~SPP_PMTUD) | pmtud_change; | |
2502 | } else { | |
2503 | sp->param_flags = | |
2504 | (sp->param_flags & ~SPP_PMTUD) | pmtud_change; | |
2505 | } | |
2506 | } | |
2507 | ||
bdf3092a VY |
2508 | /* Note that unless the spp_flag is set to SPP_SACKDELAY_ENABLE the |
2509 | * value of this field is ignored. Note also that a value of zero | |
2510 | * indicates the current setting should be left unchanged. | |
2511 | */ | |
2512 | if ((params->spp_flags & SPP_SACKDELAY_ENABLE) && params->spp_sackdelay) { | |
52ccb8e9 FF |
2513 | if (trans) { |
2514 | trans->sackdelay = | |
2515 | msecs_to_jiffies(params->spp_sackdelay); | |
2516 | } else if (asoc) { | |
2517 | asoc->sackdelay = | |
2518 | msecs_to_jiffies(params->spp_sackdelay); | |
2519 | } else { | |
2520 | sp->sackdelay = params->spp_sackdelay; | |
2521 | } | |
2522 | } | |
2523 | ||
2524 | if (sackdelay_change) { | |
2525 | if (trans) { | |
2526 | trans->param_flags = | |
2527 | (trans->param_flags & ~SPP_SACKDELAY) | | |
2528 | sackdelay_change; | |
2529 | } else if (asoc) { | |
2530 | asoc->param_flags = | |
2531 | (asoc->param_flags & ~SPP_SACKDELAY) | | |
2532 | sackdelay_change; | |
2533 | } else { | |
2534 | sp->param_flags = | |
2535 | (sp->param_flags & ~SPP_SACKDELAY) | | |
2536 | sackdelay_change; | |
2537 | } | |
2538 | } | |
2539 | ||
37051f73 APO |
2540 | /* Note that a value of zero indicates the current setting should be |
2541 | left unchanged. | |
bdf3092a | 2542 | */ |
37051f73 | 2543 | if (params->spp_pathmaxrxt) { |
52ccb8e9 FF |
2544 | if (trans) { |
2545 | trans->pathmaxrxt = params->spp_pathmaxrxt; | |
2546 | } else if (asoc) { | |
2547 | asoc->pathmaxrxt = params->spp_pathmaxrxt; | |
2548 | } else { | |
2549 | sp->pathmaxrxt = params->spp_pathmaxrxt; | |
2550 | } | |
2551 | } | |
2552 | ||
0b0dce7a | 2553 | if (params->spp_flags & SPP_IPV6_FLOWLABEL) { |
741880e1 XL |
2554 | if (trans) { |
2555 | if (trans->ipaddr.sa.sa_family == AF_INET6) { | |
2556 | trans->flowlabel = params->spp_ipv6_flowlabel & | |
2557 | SCTP_FLOWLABEL_VAL_MASK; | |
2558 | trans->flowlabel |= SCTP_FLOWLABEL_SET_MASK; | |
2559 | } | |
0b0dce7a | 2560 | } else if (asoc) { |
af8a2b8b XL |
2561 | struct sctp_transport *t; |
2562 | ||
2563 | list_for_each_entry(t, &asoc->peer.transport_addr_list, | |
0b0dce7a | 2564 | transports) { |
af8a2b8b | 2565 | if (t->ipaddr.sa.sa_family != AF_INET6) |
0b0dce7a | 2566 | continue; |
af8a2b8b XL |
2567 | t->flowlabel = params->spp_ipv6_flowlabel & |
2568 | SCTP_FLOWLABEL_VAL_MASK; | |
2569 | t->flowlabel |= SCTP_FLOWLABEL_SET_MASK; | |
0b0dce7a XL |
2570 | } |
2571 | asoc->flowlabel = params->spp_ipv6_flowlabel & | |
2572 | SCTP_FLOWLABEL_VAL_MASK; | |
2573 | asoc->flowlabel |= SCTP_FLOWLABEL_SET_MASK; | |
2574 | } else if (sctp_opt2sk(sp)->sk_family == AF_INET6) { | |
2575 | sp->flowlabel = params->spp_ipv6_flowlabel & | |
2576 | SCTP_FLOWLABEL_VAL_MASK; | |
2577 | sp->flowlabel |= SCTP_FLOWLABEL_SET_MASK; | |
2578 | } | |
2579 | } | |
2580 | ||
2581 | if (params->spp_flags & SPP_DSCP) { | |
2582 | if (trans) { | |
2583 | trans->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK; | |
2584 | trans->dscp |= SCTP_DSCP_SET_MASK; | |
2585 | } else if (asoc) { | |
af8a2b8b XL |
2586 | struct sctp_transport *t; |
2587 | ||
2588 | list_for_each_entry(t, &asoc->peer.transport_addr_list, | |
0b0dce7a | 2589 | transports) { |
af8a2b8b XL |
2590 | t->dscp = params->spp_dscp & |
2591 | SCTP_DSCP_VAL_MASK; | |
2592 | t->dscp |= SCTP_DSCP_SET_MASK; | |
0b0dce7a XL |
2593 | } |
2594 | asoc->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK; | |
2595 | asoc->dscp |= SCTP_DSCP_SET_MASK; | |
2596 | } else { | |
2597 | sp->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK; | |
2598 | sp->dscp |= SCTP_DSCP_SET_MASK; | |
2599 | } | |
2600 | } | |
2601 | ||
52ccb8e9 FF |
2602 | return 0; |
2603 | } | |
2604 | ||
1da177e4 | 2605 | static int sctp_setsockopt_peer_addr_params(struct sock *sk, |
b7058842 DM |
2606 | char __user *optval, |
2607 | unsigned int optlen) | |
1da177e4 | 2608 | { |
52ccb8e9 FF |
2609 | struct sctp_paddrparams params; |
2610 | struct sctp_transport *trans = NULL; | |
2611 | struct sctp_association *asoc = NULL; | |
2612 | struct sctp_sock *sp = sctp_sk(sk); | |
1da177e4 | 2613 | int error; |
52ccb8e9 | 2614 | int hb_change, pmtud_change, sackdelay_change; |
1da177e4 | 2615 | |
0b0dce7a XL |
2616 | if (optlen == sizeof(params)) { |
2617 | if (copy_from_user(¶ms, optval, optlen)) | |
2618 | return -EFAULT; | |
2619 | } else if (optlen == ALIGN(offsetof(struct sctp_paddrparams, | |
2620 | spp_ipv6_flowlabel), 4)) { | |
2621 | if (copy_from_user(¶ms, optval, optlen)) | |
2622 | return -EFAULT; | |
2623 | if (params.spp_flags & (SPP_DSCP | SPP_IPV6_FLOWLABEL)) | |
2624 | return -EINVAL; | |
2625 | } else { | |
cb3f837b | 2626 | return -EINVAL; |
0b0dce7a | 2627 | } |
1da177e4 | 2628 | |
52ccb8e9 FF |
2629 | /* Validate flags and value parameters. */ |
2630 | hb_change = params.spp_flags & SPP_HB; | |
2631 | pmtud_change = params.spp_flags & SPP_PMTUD; | |
2632 | sackdelay_change = params.spp_flags & SPP_SACKDELAY; | |
2633 | ||
2634 | if (hb_change == SPP_HB || | |
2635 | pmtud_change == SPP_PMTUD || | |
2636 | sackdelay_change == SPP_SACKDELAY || | |
2637 | params.spp_sackdelay > 500 || | |
f64f9e71 JP |
2638 | (params.spp_pathmtu && |
2639 | params.spp_pathmtu < SCTP_DEFAULT_MINSEGMENT)) | |
52ccb8e9 | 2640 | return -EINVAL; |
1da177e4 | 2641 | |
52ccb8e9 FF |
2642 | /* If an address other than INADDR_ANY is specified, and |
2643 | * no transport is found, then the request is invalid. | |
2644 | */ | |
cb3f837b | 2645 | if (!sctp_is_any(sk, (union sctp_addr *)¶ms.spp_address)) { |
52ccb8e9 FF |
2646 | trans = sctp_addr_id2transport(sk, ¶ms.spp_address, |
2647 | params.spp_assoc_id); | |
2648 | if (!trans) | |
1da177e4 | 2649 | return -EINVAL; |
1da177e4 LT |
2650 | } |
2651 | ||
b99e5e02 XL |
2652 | /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the |
2653 | * socket is a one to many style socket, and an association | |
2654 | * was not found, then the id was invalid. | |
52ccb8e9 FF |
2655 | */ |
2656 | asoc = sctp_id2assoc(sk, params.spp_assoc_id); | |
b99e5e02 XL |
2657 | if (!asoc && params.spp_assoc_id != SCTP_FUTURE_ASSOC && |
2658 | sctp_style(sk, UDP)) | |
1da177e4 LT |
2659 | return -EINVAL; |
2660 | ||
52ccb8e9 FF |
2661 | /* Heartbeat demand can only be sent on a transport or |
2662 | * association, but not a socket. | |
1da177e4 | 2663 | */ |
52ccb8e9 FF |
2664 | if (params.spp_flags & SPP_HB_DEMAND && !trans && !asoc) |
2665 | return -EINVAL; | |
2666 | ||
2667 | /* Process parameters. */ | |
2668 | error = sctp_apply_peer_addr_params(¶ms, trans, asoc, sp, | |
2669 | hb_change, pmtud_change, | |
2670 | sackdelay_change); | |
1da177e4 | 2671 | |
52ccb8e9 FF |
2672 | if (error) |
2673 | return error; | |
2674 | ||
2675 | /* If changes are for association, also apply parameters to each | |
2676 | * transport. | |
1da177e4 | 2677 | */ |
52ccb8e9 | 2678 | if (!trans && asoc) { |
9dbc15f0 RD |
2679 | list_for_each_entry(trans, &asoc->peer.transport_addr_list, |
2680 | transports) { | |
52ccb8e9 FF |
2681 | sctp_apply_peer_addr_params(¶ms, trans, asoc, sp, |
2682 | hb_change, pmtud_change, | |
2683 | sackdelay_change); | |
2684 | } | |
2685 | } | |
1da177e4 LT |
2686 | |
2687 | return 0; | |
2688 | } | |
2689 | ||
0ea5e4df | 2690 | static inline __u32 sctp_spp_sackdelay_enable(__u32 param_flags) |
2691 | { | |
2692 | return (param_flags & ~SPP_SACKDELAY) | SPP_SACKDELAY_ENABLE; | |
2693 | } | |
2694 | ||
2695 | static inline __u32 sctp_spp_sackdelay_disable(__u32 param_flags) | |
2696 | { | |
2697 | return (param_flags & ~SPP_SACKDELAY) | SPP_SACKDELAY_DISABLE; | |
2698 | } | |
2699 | ||
9c5829e1 XL |
2700 | static void sctp_apply_asoc_delayed_ack(struct sctp_sack_info *params, |
2701 | struct sctp_association *asoc) | |
2702 | { | |
2703 | struct sctp_transport *trans; | |
2704 | ||
2705 | if (params->sack_delay) { | |
2706 | asoc->sackdelay = msecs_to_jiffies(params->sack_delay); | |
2707 | asoc->param_flags = | |
2708 | sctp_spp_sackdelay_enable(asoc->param_flags); | |
2709 | } | |
2710 | if (params->sack_freq == 1) { | |
2711 | asoc->param_flags = | |
2712 | sctp_spp_sackdelay_disable(asoc->param_flags); | |
2713 | } else if (params->sack_freq > 1) { | |
2714 | asoc->sackfreq = params->sack_freq; | |
2715 | asoc->param_flags = | |
2716 | sctp_spp_sackdelay_enable(asoc->param_flags); | |
2717 | } | |
2718 | ||
2719 | list_for_each_entry(trans, &asoc->peer.transport_addr_list, | |
2720 | transports) { | |
2721 | if (params->sack_delay) { | |
2722 | trans->sackdelay = msecs_to_jiffies(params->sack_delay); | |
2723 | trans->param_flags = | |
2724 | sctp_spp_sackdelay_enable(trans->param_flags); | |
2725 | } | |
2726 | if (params->sack_freq == 1) { | |
2727 | trans->param_flags = | |
2728 | sctp_spp_sackdelay_disable(trans->param_flags); | |
2729 | } else if (params->sack_freq > 1) { | |
2730 | trans->sackfreq = params->sack_freq; | |
2731 | trans->param_flags = | |
2732 | sctp_spp_sackdelay_enable(trans->param_flags); | |
2733 | } | |
2734 | } | |
2735 | } | |
2736 | ||
d364d927 WY |
2737 | /* |
2738 | * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK) | |
2739 | * | |
2740 | * This option will effect the way delayed acks are performed. This | |
2741 | * option allows you to get or set the delayed ack time, in | |
2742 | * milliseconds. It also allows changing the delayed ack frequency. | |
2743 | * Changing the frequency to 1 disables the delayed sack algorithm. If | |
2744 | * the assoc_id is 0, then this sets or gets the endpoints default | |
2745 | * values. If the assoc_id field is non-zero, then the set or get | |
2746 | * effects the specified association for the one to many model (the | |
2747 | * assoc_id field is ignored by the one to one model). Note that if | |
2748 | * sack_delay or sack_freq are 0 when setting this option, then the | |
2749 | * current values will remain unchanged. | |
2750 | * | |
2751 | * struct sctp_sack_info { | |
2752 | * sctp_assoc_t sack_assoc_id; | |
2753 | * uint32_t sack_delay; | |
2754 | * uint32_t sack_freq; | |
2755 | * }; | |
2756 | * | |
2757 | * sack_assoc_id - This parameter, indicates which association the user | |
2758 | * is performing an action upon. Note that if this field's value is | |
2759 | * zero then the endpoints default value is changed (effecting future | |
2760 | * associations only). | |
2761 | * | |
2762 | * sack_delay - This parameter contains the number of milliseconds that | |
2763 | * the user is requesting the delayed ACK timer be set to. Note that | |
2764 | * this value is defined in the standard to be between 200 and 500 | |
2765 | * milliseconds. | |
2766 | * | |
2767 | * sack_freq - This parameter contains the number of packets that must | |
2768 | * be received before a sack is sent without waiting for the delay | |
2769 | * timer to expire. The default value for this is 2, setting this | |
2770 | * value to 1 will disable the delayed sack algorithm. | |
7708610b FF |
2771 | */ |
2772 | ||
d364d927 | 2773 | static int sctp_setsockopt_delayed_ack(struct sock *sk, |
b7058842 | 2774 | char __user *optval, unsigned int optlen) |
7708610b | 2775 | { |
9c5829e1 XL |
2776 | struct sctp_sock *sp = sctp_sk(sk); |
2777 | struct sctp_association *asoc; | |
2778 | struct sctp_sack_info params; | |
7708610b | 2779 | |
d364d927 WY |
2780 | if (optlen == sizeof(struct sctp_sack_info)) { |
2781 | if (copy_from_user(¶ms, optval, optlen)) | |
2782 | return -EFAULT; | |
7708610b | 2783 | |
d364d927 WY |
2784 | if (params.sack_delay == 0 && params.sack_freq == 0) |
2785 | return 0; | |
2786 | } else if (optlen == sizeof(struct sctp_assoc_value)) { | |
94f65193 | 2787 | pr_warn_ratelimited(DEPRECATED |
f916ec96 | 2788 | "%s (pid %d) " |
94f65193 | 2789 | "Use of struct sctp_assoc_value in delayed_ack socket option.\n" |
f916ec96 NH |
2790 | "Use struct sctp_sack_info instead\n", |
2791 | current->comm, task_pid_nr(current)); | |
d364d927 WY |
2792 | if (copy_from_user(¶ms, optval, optlen)) |
2793 | return -EFAULT; | |
2794 | ||
2795 | if (params.sack_delay == 0) | |
2796 | params.sack_freq = 1; | |
2797 | else | |
2798 | params.sack_freq = 0; | |
2799 | } else | |
cb3f837b | 2800 | return -EINVAL; |
7708610b FF |
2801 | |
2802 | /* Validate value parameter. */ | |
d364d927 | 2803 | if (params.sack_delay > 500) |
7708610b FF |
2804 | return -EINVAL; |
2805 | ||
9c5829e1 XL |
2806 | /* Get association, if sack_assoc_id != SCTP_FUTURE_ASSOC and the |
2807 | * socket is a one to many style socket, and an association | |
2808 | * was not found, then the id was invalid. | |
d808ad9a | 2809 | */ |
d364d927 | 2810 | asoc = sctp_id2assoc(sk, params.sack_assoc_id); |
9c5829e1 XL |
2811 | if (!asoc && params.sack_assoc_id > SCTP_ALL_ASSOC && |
2812 | sctp_style(sk, UDP)) | |
7708610b FF |
2813 | return -EINVAL; |
2814 | ||
9c5829e1 XL |
2815 | if (asoc) { |
2816 | sctp_apply_asoc_delayed_ack(¶ms, asoc); | |
2817 | ||
2818 | return 0; | |
2819 | } | |
2820 | ||
8e2614fc XL |
2821 | if (sctp_style(sk, TCP)) |
2822 | params.sack_assoc_id = SCTP_FUTURE_ASSOC; | |
2823 | ||
9c5829e1 XL |
2824 | if (params.sack_assoc_id == SCTP_FUTURE_ASSOC || |
2825 | params.sack_assoc_id == SCTP_ALL_ASSOC) { | |
2826 | if (params.sack_delay) { | |
d364d927 | 2827 | sp->sackdelay = params.sack_delay; |
d808ad9a | 2828 | sp->param_flags = |
0ea5e4df | 2829 | sctp_spp_sackdelay_enable(sp->param_flags); |
7708610b | 2830 | } |
9c5829e1 | 2831 | if (params.sack_freq == 1) { |
d808ad9a | 2832 | sp->param_flags = |
0ea5e4df | 2833 | sctp_spp_sackdelay_disable(sp->param_flags); |
9c5829e1 | 2834 | } else if (params.sack_freq > 1) { |
d364d927 WY |
2835 | sp->sackfreq = params.sack_freq; |
2836 | sp->param_flags = | |
0ea5e4df | 2837 | sctp_spp_sackdelay_enable(sp->param_flags); |
d364d927 | 2838 | } |
7708610b FF |
2839 | } |
2840 | ||
9c5829e1 XL |
2841 | if (params.sack_assoc_id == SCTP_CURRENT_ASSOC || |
2842 | params.sack_assoc_id == SCTP_ALL_ASSOC) | |
2843 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) | |
2844 | sctp_apply_asoc_delayed_ack(¶ms, asoc); | |
d808ad9a | 2845 | |
7708610b FF |
2846 | return 0; |
2847 | } | |
2848 | ||
1da177e4 LT |
2849 | /* 7.1.3 Initialization Parameters (SCTP_INITMSG) |
2850 | * | |
2851 | * Applications can specify protocol parameters for the default association | |
2852 | * initialization. The option name argument to setsockopt() and getsockopt() | |
2853 | * is SCTP_INITMSG. | |
2854 | * | |
2855 | * Setting initialization parameters is effective only on an unconnected | |
2856 | * socket (for UDP-style sockets only future associations are effected | |
2857 | * by the change). With TCP-style sockets, this option is inherited by | |
2858 | * sockets derived from a listener socket. | |
2859 | */ | |
b7058842 | 2860 | static int sctp_setsockopt_initmsg(struct sock *sk, char __user *optval, unsigned int optlen) |
1da177e4 LT |
2861 | { |
2862 | struct sctp_initmsg sinit; | |
2863 | struct sctp_sock *sp = sctp_sk(sk); | |
2864 | ||
2865 | if (optlen != sizeof(struct sctp_initmsg)) | |
2866 | return -EINVAL; | |
2867 | if (copy_from_user(&sinit, optval, optlen)) | |
2868 | return -EFAULT; | |
2869 | ||
2870 | if (sinit.sinit_num_ostreams) | |
d808ad9a | 2871 | sp->initmsg.sinit_num_ostreams = sinit.sinit_num_ostreams; |
1da177e4 | 2872 | if (sinit.sinit_max_instreams) |
d808ad9a | 2873 | sp->initmsg.sinit_max_instreams = sinit.sinit_max_instreams; |
1da177e4 | 2874 | if (sinit.sinit_max_attempts) |
d808ad9a | 2875 | sp->initmsg.sinit_max_attempts = sinit.sinit_max_attempts; |
1da177e4 | 2876 | if (sinit.sinit_max_init_timeo) |
d808ad9a | 2877 | sp->initmsg.sinit_max_init_timeo = sinit.sinit_max_init_timeo; |
1da177e4 LT |
2878 | |
2879 | return 0; | |
2880 | } | |
2881 | ||
2882 | /* | |
2883 | * 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM) | |
2884 | * | |
2885 | * Applications that wish to use the sendto() system call may wish to | |
2886 | * specify a default set of parameters that would normally be supplied | |
2887 | * through the inclusion of ancillary data. This socket option allows | |
2888 | * such an application to set the default sctp_sndrcvinfo structure. | |
2889 | * The application that wishes to use this socket option simply passes | |
2890 | * in to this call the sctp_sndrcvinfo structure defined in Section | |
2891 | * 5.2.2) The input parameters accepted by this call include | |
2892 | * sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context, | |
2893 | * sinfo_timetolive. The user must provide the sinfo_assoc_id field in | |
2894 | * to this call if the caller is using the UDP model. | |
2895 | */ | |
2896 | static int sctp_setsockopt_default_send_param(struct sock *sk, | |
b7058842 DM |
2897 | char __user *optval, |
2898 | unsigned int optlen) | |
1da177e4 | 2899 | { |
1da177e4 | 2900 | struct sctp_sock *sp = sctp_sk(sk); |
6b3fd5f3 GOV |
2901 | struct sctp_association *asoc; |
2902 | struct sctp_sndrcvinfo info; | |
1da177e4 | 2903 | |
6b3fd5f3 | 2904 | if (optlen != sizeof(info)) |
1da177e4 LT |
2905 | return -EINVAL; |
2906 | if (copy_from_user(&info, optval, optlen)) | |
2907 | return -EFAULT; | |
6b3fd5f3 GOV |
2908 | if (info.sinfo_flags & |
2909 | ~(SCTP_UNORDERED | SCTP_ADDR_OVER | | |
2910 | SCTP_ABORT | SCTP_EOF)) | |
2911 | return -EINVAL; | |
1da177e4 LT |
2912 | |
2913 | asoc = sctp_id2assoc(sk, info.sinfo_assoc_id); | |
707e45b3 XL |
2914 | if (!asoc && info.sinfo_assoc_id > SCTP_ALL_ASSOC && |
2915 | sctp_style(sk, UDP)) | |
1da177e4 | 2916 | return -EINVAL; |
707e45b3 | 2917 | |
1da177e4 LT |
2918 | if (asoc) { |
2919 | asoc->default_stream = info.sinfo_stream; | |
2920 | asoc->default_flags = info.sinfo_flags; | |
2921 | asoc->default_ppid = info.sinfo_ppid; | |
2922 | asoc->default_context = info.sinfo_context; | |
2923 | asoc->default_timetolive = info.sinfo_timetolive; | |
707e45b3 XL |
2924 | |
2925 | return 0; | |
2926 | } | |
2927 | ||
1354e72f MRL |
2928 | if (sctp_style(sk, TCP)) |
2929 | info.sinfo_assoc_id = SCTP_FUTURE_ASSOC; | |
2930 | ||
707e45b3 XL |
2931 | if (info.sinfo_assoc_id == SCTP_FUTURE_ASSOC || |
2932 | info.sinfo_assoc_id == SCTP_ALL_ASSOC) { | |
1da177e4 LT |
2933 | sp->default_stream = info.sinfo_stream; |
2934 | sp->default_flags = info.sinfo_flags; | |
2935 | sp->default_ppid = info.sinfo_ppid; | |
2936 | sp->default_context = info.sinfo_context; | |
2937 | sp->default_timetolive = info.sinfo_timetolive; | |
2938 | } | |
2939 | ||
707e45b3 XL |
2940 | if (info.sinfo_assoc_id == SCTP_CURRENT_ASSOC || |
2941 | info.sinfo_assoc_id == SCTP_ALL_ASSOC) { | |
2942 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) { | |
2943 | asoc->default_stream = info.sinfo_stream; | |
2944 | asoc->default_flags = info.sinfo_flags; | |
2945 | asoc->default_ppid = info.sinfo_ppid; | |
2946 | asoc->default_context = info.sinfo_context; | |
2947 | asoc->default_timetolive = info.sinfo_timetolive; | |
2948 | } | |
2949 | } | |
2950 | ||
1da177e4 LT |
2951 | return 0; |
2952 | } | |
2953 | ||
6b3fd5f3 GOV |
2954 | /* RFC6458, Section 8.1.31. Set/get Default Send Parameters |
2955 | * (SCTP_DEFAULT_SNDINFO) | |
2956 | */ | |
2957 | static int sctp_setsockopt_default_sndinfo(struct sock *sk, | |
2958 | char __user *optval, | |
2959 | unsigned int optlen) | |
2960 | { | |
2961 | struct sctp_sock *sp = sctp_sk(sk); | |
2962 | struct sctp_association *asoc; | |
2963 | struct sctp_sndinfo info; | |
2964 | ||
2965 | if (optlen != sizeof(info)) | |
2966 | return -EINVAL; | |
2967 | if (copy_from_user(&info, optval, optlen)) | |
2968 | return -EFAULT; | |
2969 | if (info.snd_flags & | |
2970 | ~(SCTP_UNORDERED | SCTP_ADDR_OVER | | |
2971 | SCTP_ABORT | SCTP_EOF)) | |
2972 | return -EINVAL; | |
2973 | ||
2974 | asoc = sctp_id2assoc(sk, info.snd_assoc_id); | |
92fc3bd9 XL |
2975 | if (!asoc && info.snd_assoc_id > SCTP_ALL_ASSOC && |
2976 | sctp_style(sk, UDP)) | |
6b3fd5f3 | 2977 | return -EINVAL; |
92fc3bd9 | 2978 | |
6b3fd5f3 GOV |
2979 | if (asoc) { |
2980 | asoc->default_stream = info.snd_sid; | |
2981 | asoc->default_flags = info.snd_flags; | |
2982 | asoc->default_ppid = info.snd_ppid; | |
2983 | asoc->default_context = info.snd_context; | |
92fc3bd9 XL |
2984 | |
2985 | return 0; | |
2986 | } | |
2987 | ||
a842e65b XL |
2988 | if (sctp_style(sk, TCP)) |
2989 | info.snd_assoc_id = SCTP_FUTURE_ASSOC; | |
2990 | ||
92fc3bd9 XL |
2991 | if (info.snd_assoc_id == SCTP_FUTURE_ASSOC || |
2992 | info.snd_assoc_id == SCTP_ALL_ASSOC) { | |
6b3fd5f3 GOV |
2993 | sp->default_stream = info.snd_sid; |
2994 | sp->default_flags = info.snd_flags; | |
2995 | sp->default_ppid = info.snd_ppid; | |
2996 | sp->default_context = info.snd_context; | |
2997 | } | |
2998 | ||
92fc3bd9 XL |
2999 | if (info.snd_assoc_id == SCTP_CURRENT_ASSOC || |
3000 | info.snd_assoc_id == SCTP_ALL_ASSOC) { | |
3001 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) { | |
3002 | asoc->default_stream = info.snd_sid; | |
3003 | asoc->default_flags = info.snd_flags; | |
3004 | asoc->default_ppid = info.snd_ppid; | |
3005 | asoc->default_context = info.snd_context; | |
3006 | } | |
3007 | } | |
3008 | ||
6b3fd5f3 GOV |
3009 | return 0; |
3010 | } | |
3011 | ||
1da177e4 LT |
3012 | /* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR) |
3013 | * | |
3014 | * Requests that the local SCTP stack use the enclosed peer address as | |
3015 | * the association primary. The enclosed address must be one of the | |
3016 | * association peer's addresses. | |
3017 | */ | |
3018 | static int sctp_setsockopt_primary_addr(struct sock *sk, char __user *optval, | |
b7058842 | 3019 | unsigned int optlen) |
1da177e4 LT |
3020 | { |
3021 | struct sctp_prim prim; | |
3022 | struct sctp_transport *trans; | |
2277c7cd RH |
3023 | struct sctp_af *af; |
3024 | int err; | |
1da177e4 LT |
3025 | |
3026 | if (optlen != sizeof(struct sctp_prim)) | |
3027 | return -EINVAL; | |
3028 | ||
3029 | if (copy_from_user(&prim, optval, sizeof(struct sctp_prim))) | |
3030 | return -EFAULT; | |
3031 | ||
2277c7cd RH |
3032 | /* Allow security module to validate address but need address len. */ |
3033 | af = sctp_get_af_specific(prim.ssp_addr.ss_family); | |
3034 | if (!af) | |
3035 | return -EINVAL; | |
3036 | ||
3037 | err = security_sctp_bind_connect(sk, SCTP_PRIMARY_ADDR, | |
3038 | (struct sockaddr *)&prim.ssp_addr, | |
3039 | af->sockaddr_len); | |
3040 | if (err) | |
3041 | return err; | |
3042 | ||
1da177e4 LT |
3043 | trans = sctp_addr_id2transport(sk, &prim.ssp_addr, prim.ssp_assoc_id); |
3044 | if (!trans) | |
3045 | return -EINVAL; | |
3046 | ||
3047 | sctp_assoc_set_primary(trans->asoc, trans); | |
3048 | ||
3049 | return 0; | |
3050 | } | |
3051 | ||
3052 | /* | |
3053 | * 7.1.5 SCTP_NODELAY | |
3054 | * | |
3055 | * Turn on/off any Nagle-like algorithm. This means that packets are | |
3056 | * generally sent as soon as possible and no unnecessary delays are | |
3057 | * introduced, at the cost of more packets in the network. Expects an | |
3058 | * integer boolean flag. | |
3059 | */ | |
3060 | static int sctp_setsockopt_nodelay(struct sock *sk, char __user *optval, | |
b7058842 | 3061 | unsigned int optlen) |
1da177e4 LT |
3062 | { |
3063 | int val; | |
3064 | ||
3065 | if (optlen < sizeof(int)) | |
3066 | return -EINVAL; | |
3067 | if (get_user(val, (int __user *)optval)) | |
3068 | return -EFAULT; | |
3069 | ||
3070 | sctp_sk(sk)->nodelay = (val == 0) ? 0 : 1; | |
3071 | return 0; | |
3072 | } | |
3073 | ||
3074 | /* | |
3075 | * | |
3076 | * 7.1.1 SCTP_RTOINFO | |
3077 | * | |
3078 | * The protocol parameters used to initialize and bound retransmission | |
3079 | * timeout (RTO) are tunable. sctp_rtoinfo structure is used to access | |
3080 | * and modify these parameters. | |
3081 | * All parameters are time values, in milliseconds. A value of 0, when | |
3082 | * modifying the parameters, indicates that the current value should not | |
3083 | * be changed. | |
3084 | * | |
3085 | */ | |
b7058842 DM |
3086 | static int sctp_setsockopt_rtoinfo(struct sock *sk, char __user *optval, unsigned int optlen) |
3087 | { | |
1da177e4 LT |
3088 | struct sctp_rtoinfo rtoinfo; |
3089 | struct sctp_association *asoc; | |
85f935d4 | 3090 | unsigned long rto_min, rto_max; |
3091 | struct sctp_sock *sp = sctp_sk(sk); | |
1da177e4 LT |
3092 | |
3093 | if (optlen != sizeof (struct sctp_rtoinfo)) | |
3094 | return -EINVAL; | |
3095 | ||
3096 | if (copy_from_user(&rtoinfo, optval, optlen)) | |
3097 | return -EFAULT; | |
3098 | ||
3099 | asoc = sctp_id2assoc(sk, rtoinfo.srto_assoc_id); | |
3100 | ||
3101 | /* Set the values to the specific association */ | |
7adb5ed5 XL |
3102 | if (!asoc && rtoinfo.srto_assoc_id != SCTP_FUTURE_ASSOC && |
3103 | sctp_style(sk, UDP)) | |
1da177e4 LT |
3104 | return -EINVAL; |
3105 | ||
85f935d4 | 3106 | rto_max = rtoinfo.srto_max; |
3107 | rto_min = rtoinfo.srto_min; | |
3108 | ||
3109 | if (rto_max) | |
3110 | rto_max = asoc ? msecs_to_jiffies(rto_max) : rto_max; | |
3111 | else | |
3112 | rto_max = asoc ? asoc->rto_max : sp->rtoinfo.srto_max; | |
3113 | ||
3114 | if (rto_min) | |
3115 | rto_min = asoc ? msecs_to_jiffies(rto_min) : rto_min; | |
3116 | else | |
3117 | rto_min = asoc ? asoc->rto_min : sp->rtoinfo.srto_min; | |
3118 | ||
3119 | if (rto_min > rto_max) | |
3120 | return -EINVAL; | |
3121 | ||
1da177e4 LT |
3122 | if (asoc) { |
3123 | if (rtoinfo.srto_initial != 0) | |
d808ad9a | 3124 | asoc->rto_initial = |
1da177e4 | 3125 | msecs_to_jiffies(rtoinfo.srto_initial); |
85f935d4 | 3126 | asoc->rto_max = rto_max; |
3127 | asoc->rto_min = rto_min; | |
1da177e4 LT |
3128 | } else { |
3129 | /* If there is no association or the association-id = 0 | |
3130 | * set the values to the endpoint. | |
3131 | */ | |
1da177e4 LT |
3132 | if (rtoinfo.srto_initial != 0) |
3133 | sp->rtoinfo.srto_initial = rtoinfo.srto_initial; | |
85f935d4 | 3134 | sp->rtoinfo.srto_max = rto_max; |
3135 | sp->rtoinfo.srto_min = rto_min; | |
1da177e4 LT |
3136 | } |
3137 | ||
3138 | return 0; | |
3139 | } | |
3140 | ||
3141 | /* | |
3142 | * | |
3143 | * 7.1.2 SCTP_ASSOCINFO | |
3144 | * | |
59c51591 | 3145 | * This option is used to tune the maximum retransmission attempts |
1da177e4 LT |
3146 | * of the association. |
3147 | * Returns an error if the new association retransmission value is | |
3148 | * greater than the sum of the retransmission value of the peer. | |
3149 | * See [SCTP] for more information. | |
3150 | * | |
3151 | */ | |
b7058842 | 3152 | static int sctp_setsockopt_associnfo(struct sock *sk, char __user *optval, unsigned int optlen) |
1da177e4 LT |
3153 | { |
3154 | ||
3155 | struct sctp_assocparams assocparams; | |
3156 | struct sctp_association *asoc; | |
3157 | ||
3158 | if (optlen != sizeof(struct sctp_assocparams)) | |
3159 | return -EINVAL; | |
3160 | if (copy_from_user(&assocparams, optval, optlen)) | |
3161 | return -EFAULT; | |
3162 | ||
3163 | asoc = sctp_id2assoc(sk, assocparams.sasoc_assoc_id); | |
3164 | ||
8889394d XL |
3165 | if (!asoc && assocparams.sasoc_assoc_id != SCTP_FUTURE_ASSOC && |
3166 | sctp_style(sk, UDP)) | |
1da177e4 LT |
3167 | return -EINVAL; |
3168 | ||
3169 | /* Set the values to the specific association */ | |
3170 | if (asoc) { | |
402d68c4 VY |
3171 | if (assocparams.sasoc_asocmaxrxt != 0) { |
3172 | __u32 path_sum = 0; | |
3173 | int paths = 0; | |
402d68c4 VY |
3174 | struct sctp_transport *peer_addr; |
3175 | ||
9dbc15f0 RD |
3176 | list_for_each_entry(peer_addr, &asoc->peer.transport_addr_list, |
3177 | transports) { | |
402d68c4 VY |
3178 | path_sum += peer_addr->pathmaxrxt; |
3179 | paths++; | |
3180 | } | |
3181 | ||
025dfdaf | 3182 | /* Only validate asocmaxrxt if we have more than |
402d68c4 VY |
3183 | * one path/transport. We do this because path |
3184 | * retransmissions are only counted when we have more | |
3185 | * then one path. | |
3186 | */ | |
3187 | if (paths > 1 && | |
3188 | assocparams.sasoc_asocmaxrxt > path_sum) | |
3189 | return -EINVAL; | |
3190 | ||
1da177e4 | 3191 | asoc->max_retrans = assocparams.sasoc_asocmaxrxt; |
402d68c4 VY |
3192 | } |
3193 | ||
52db882f DB |
3194 | if (assocparams.sasoc_cookie_life != 0) |
3195 | asoc->cookie_life = ms_to_ktime(assocparams.sasoc_cookie_life); | |
1da177e4 LT |
3196 | } else { |
3197 | /* Set the values to the endpoint */ | |
3198 | struct sctp_sock *sp = sctp_sk(sk); | |
3199 | ||
3200 | if (assocparams.sasoc_asocmaxrxt != 0) | |
3201 | sp->assocparams.sasoc_asocmaxrxt = | |
3202 | assocparams.sasoc_asocmaxrxt; | |
3203 | if (assocparams.sasoc_cookie_life != 0) | |
3204 | sp->assocparams.sasoc_cookie_life = | |
3205 | assocparams.sasoc_cookie_life; | |
3206 | } | |
3207 | return 0; | |
3208 | } | |
3209 | ||
3210 | /* | |
3211 | * 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR) | |
3212 | * | |
3213 | * This socket option is a boolean flag which turns on or off mapped V4 | |
3214 | * addresses. If this option is turned on and the socket is type | |
3215 | * PF_INET6, then IPv4 addresses will be mapped to V6 representation. | |
3216 | * If this option is turned off, then no mapping will be done of V4 | |
3217 | * addresses and a user will receive both PF_INET6 and PF_INET type | |
3218 | * addresses on the socket. | |
3219 | */ | |
b7058842 | 3220 | static int sctp_setsockopt_mappedv4(struct sock *sk, char __user *optval, unsigned int optlen) |
1da177e4 LT |
3221 | { |
3222 | int val; | |
3223 | struct sctp_sock *sp = sctp_sk(sk); | |
3224 | ||
3225 | if (optlen < sizeof(int)) | |
3226 | return -EINVAL; | |
3227 | if (get_user(val, (int __user *)optval)) | |
3228 | return -EFAULT; | |
3229 | if (val) | |
3230 | sp->v4mapped = 1; | |
3231 | else | |
3232 | sp->v4mapped = 0; | |
3233 | ||
3234 | return 0; | |
3235 | } | |
3236 | ||
3237 | /* | |
e89c2095 WY |
3238 | * 8.1.16. Get or Set the Maximum Fragmentation Size (SCTP_MAXSEG) |
3239 | * This option will get or set the maximum size to put in any outgoing | |
3240 | * SCTP DATA chunk. If a message is larger than this size it will be | |
1da177e4 LT |
3241 | * fragmented by SCTP into the specified size. Note that the underlying |
3242 | * SCTP implementation may fragment into smaller sized chunks when the | |
3243 | * PMTU of the underlying association is smaller than the value set by | |
e89c2095 WY |
3244 | * the user. The default value for this option is '0' which indicates |
3245 | * the user is NOT limiting fragmentation and only the PMTU will effect | |
3246 | * SCTP's choice of DATA chunk size. Note also that values set larger | |
3247 | * than the maximum size of an IP datagram will effectively let SCTP | |
3248 | * control fragmentation (i.e. the same as setting this option to 0). | |
3249 | * | |
3250 | * The following structure is used to access and modify this parameter: | |
3251 | * | |
3252 | * struct sctp_assoc_value { | |
3253 | * sctp_assoc_t assoc_id; | |
3254 | * uint32_t assoc_value; | |
3255 | * }; | |
3256 | * | |
3257 | * assoc_id: This parameter is ignored for one-to-one style sockets. | |
3258 | * For one-to-many style sockets this parameter indicates which | |
3259 | * association the user is performing an action upon. Note that if | |
3260 | * this field's value is zero then the endpoints default value is | |
3261 | * changed (effecting future associations only). | |
3262 | * assoc_value: This parameter specifies the maximum size in bytes. | |
1da177e4 | 3263 | */ |
b7058842 | 3264 | static int sctp_setsockopt_maxseg(struct sock *sk, char __user *optval, unsigned int optlen) |
1da177e4 | 3265 | { |
ecca8f88 | 3266 | struct sctp_sock *sp = sctp_sk(sk); |
e89c2095 | 3267 | struct sctp_assoc_value params; |
1da177e4 | 3268 | struct sctp_association *asoc; |
1da177e4 LT |
3269 | int val; |
3270 | ||
e89c2095 | 3271 | if (optlen == sizeof(int)) { |
94f65193 | 3272 | pr_warn_ratelimited(DEPRECATED |
f916ec96 | 3273 | "%s (pid %d) " |
94f65193 | 3274 | "Use of int in maxseg socket option.\n" |
f916ec96 NH |
3275 | "Use struct sctp_assoc_value instead\n", |
3276 | current->comm, task_pid_nr(current)); | |
e89c2095 WY |
3277 | if (copy_from_user(&val, optval, optlen)) |
3278 | return -EFAULT; | |
6fd769be | 3279 | params.assoc_id = SCTP_FUTURE_ASSOC; |
e89c2095 WY |
3280 | } else if (optlen == sizeof(struct sctp_assoc_value)) { |
3281 | if (copy_from_user(¶ms, optval, optlen)) | |
3282 | return -EFAULT; | |
3283 | val = params.assoc_value; | |
ecca8f88 | 3284 | } else { |
1da177e4 | 3285 | return -EINVAL; |
ecca8f88 | 3286 | } |
e89c2095 | 3287 | |
439ef030 | 3288 | asoc = sctp_id2assoc(sk, params.assoc_id); |
6fd769be XL |
3289 | if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC && |
3290 | sctp_style(sk, UDP)) | |
3291 | return -EINVAL; | |
439ef030 | 3292 | |
ecca8f88 XL |
3293 | if (val) { |
3294 | int min_len, max_len; | |
439ef030 MRL |
3295 | __u16 datasize = asoc ? sctp_datachk_len(&asoc->stream) : |
3296 | sizeof(struct sctp_data_chunk); | |
1da177e4 | 3297 | |
afd0a800 | 3298 | min_len = sctp_min_frag_point(sp, datasize); |
439ef030 | 3299 | max_len = SCTP_MAX_CHUNK_LEN - datasize; |
e89c2095 | 3300 | |
ecca8f88 XL |
3301 | if (val < min_len || val > max_len) |
3302 | return -EINVAL; | |
3303 | } | |
3304 | ||
e89c2095 | 3305 | if (asoc) { |
f68b2e05 | 3306 | asoc->user_frag = val; |
2f5e3c9d | 3307 | sctp_assoc_update_frag_point(asoc); |
e89c2095 WY |
3308 | } else { |
3309 | sp->user_frag = val; | |
1da177e4 LT |
3310 | } |
3311 | ||
3312 | return 0; | |
3313 | } | |
3314 | ||
3315 | ||
3316 | /* | |
3317 | * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR) | |
3318 | * | |
3319 | * Requests that the peer mark the enclosed address as the association | |
3320 | * primary. The enclosed address must be one of the association's | |
3321 | * locally bound addresses. The following structure is used to make a | |
3322 | * set primary request: | |
3323 | */ | |
3324 | static int sctp_setsockopt_peer_primary_addr(struct sock *sk, char __user *optval, | |
b7058842 | 3325 | unsigned int optlen) |
1da177e4 LT |
3326 | { |
3327 | struct sctp_sock *sp; | |
1da177e4 LT |
3328 | struct sctp_association *asoc = NULL; |
3329 | struct sctp_setpeerprim prim; | |
3330 | struct sctp_chunk *chunk; | |
40a01039 | 3331 | struct sctp_af *af; |
1da177e4 LT |
3332 | int err; |
3333 | ||
3334 | sp = sctp_sk(sk); | |
1da177e4 | 3335 | |
4e27428f | 3336 | if (!sp->ep->asconf_enable) |
1da177e4 LT |
3337 | return -EPERM; |
3338 | ||
3339 | if (optlen != sizeof(struct sctp_setpeerprim)) | |
3340 | return -EINVAL; | |
3341 | ||
3342 | if (copy_from_user(&prim, optval, optlen)) | |
3343 | return -EFAULT; | |
3344 | ||
3345 | asoc = sctp_id2assoc(sk, prim.sspp_assoc_id); | |
d808ad9a | 3346 | if (!asoc) |
1da177e4 LT |
3347 | return -EINVAL; |
3348 | ||
3349 | if (!asoc->peer.asconf_capable) | |
3350 | return -EPERM; | |
3351 | ||
3352 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_SET_PRIMARY) | |
3353 | return -EPERM; | |
3354 | ||
3355 | if (!sctp_state(asoc, ESTABLISHED)) | |
3356 | return -ENOTCONN; | |
3357 | ||
40a01039 WY |
3358 | af = sctp_get_af_specific(prim.sspp_addr.ss_family); |
3359 | if (!af) | |
3360 | return -EINVAL; | |
3361 | ||
3362 | if (!af->addr_valid((union sctp_addr *)&prim.sspp_addr, sp, NULL)) | |
3363 | return -EADDRNOTAVAIL; | |
3364 | ||
1da177e4 LT |
3365 | if (!sctp_assoc_lookup_laddr(asoc, (union sctp_addr *)&prim.sspp_addr)) |
3366 | return -EADDRNOTAVAIL; | |
3367 | ||
2277c7cd RH |
3368 | /* Allow security module to validate address. */ |
3369 | err = security_sctp_bind_connect(sk, SCTP_SET_PEER_PRIMARY_ADDR, | |
3370 | (struct sockaddr *)&prim.sspp_addr, | |
3371 | af->sockaddr_len); | |
3372 | if (err) | |
3373 | return err; | |
3374 | ||
1da177e4 LT |
3375 | /* Create an ASCONF chunk with SET_PRIMARY parameter */ |
3376 | chunk = sctp_make_asconf_set_prim(asoc, | |
3377 | (union sctp_addr *)&prim.sspp_addr); | |
3378 | if (!chunk) | |
3379 | return -ENOMEM; | |
3380 | ||
3381 | err = sctp_send_asconf(asoc, chunk); | |
3382 | ||
bb33381d | 3383 | pr_debug("%s: we set peer primary addr primitively\n", __func__); |
1da177e4 LT |
3384 | |
3385 | return err; | |
3386 | } | |
3387 | ||
0f3fffd8 | 3388 | static int sctp_setsockopt_adaptation_layer(struct sock *sk, char __user *optval, |
b7058842 | 3389 | unsigned int optlen) |
1da177e4 | 3390 | { |
0f3fffd8 | 3391 | struct sctp_setadaptation adaptation; |
1da177e4 | 3392 | |
0f3fffd8 | 3393 | if (optlen != sizeof(struct sctp_setadaptation)) |
1da177e4 | 3394 | return -EINVAL; |
0f3fffd8 | 3395 | if (copy_from_user(&adaptation, optval, optlen)) |
1da177e4 LT |
3396 | return -EFAULT; |
3397 | ||
0f3fffd8 | 3398 | sctp_sk(sk)->adaptation_ind = adaptation.ssb_adaptation_ind; |
1da177e4 LT |
3399 | |
3400 | return 0; | |
3401 | } | |
3402 | ||
6ab792f5 ISJ |
3403 | /* |
3404 | * 7.1.29. Set or Get the default context (SCTP_CONTEXT) | |
3405 | * | |
3406 | * The context field in the sctp_sndrcvinfo structure is normally only | |
3407 | * used when a failed message is retrieved holding the value that was | |
3408 | * sent down on the actual send call. This option allows the setting of | |
3409 | * a default context on an association basis that will be received on | |
3410 | * reading messages from the peer. This is especially helpful in the | |
3411 | * one-2-many model for an application to keep some reference to an | |
3412 | * internal state machine that is processing messages on the | |
3413 | * association. Note that the setting of this value only effects | |
3414 | * received messages from the peer and does not effect the value that is | |
3415 | * saved with outbound messages. | |
3416 | */ | |
3417 | static int sctp_setsockopt_context(struct sock *sk, char __user *optval, | |
b7058842 | 3418 | unsigned int optlen) |
6ab792f5 | 3419 | { |
49b037ac | 3420 | struct sctp_sock *sp = sctp_sk(sk); |
6ab792f5 | 3421 | struct sctp_assoc_value params; |
6ab792f5 ISJ |
3422 | struct sctp_association *asoc; |
3423 | ||
3424 | if (optlen != sizeof(struct sctp_assoc_value)) | |
3425 | return -EINVAL; | |
3426 | if (copy_from_user(¶ms, optval, optlen)) | |
3427 | return -EFAULT; | |
3428 | ||
49b037ac XL |
3429 | asoc = sctp_id2assoc(sk, params.assoc_id); |
3430 | if (!asoc && params.assoc_id > SCTP_ALL_ASSOC && | |
3431 | sctp_style(sk, UDP)) | |
3432 | return -EINVAL; | |
6ab792f5 | 3433 | |
49b037ac | 3434 | if (asoc) { |
6ab792f5 | 3435 | asoc->default_rcv_context = params.assoc_value; |
49b037ac XL |
3436 | |
3437 | return 0; | |
6ab792f5 ISJ |
3438 | } |
3439 | ||
cface2cb XL |
3440 | if (sctp_style(sk, TCP)) |
3441 | params.assoc_id = SCTP_FUTURE_ASSOC; | |
3442 | ||
49b037ac XL |
3443 | if (params.assoc_id == SCTP_FUTURE_ASSOC || |
3444 | params.assoc_id == SCTP_ALL_ASSOC) | |
3445 | sp->default_rcv_context = params.assoc_value; | |
3446 | ||
3447 | if (params.assoc_id == SCTP_CURRENT_ASSOC || | |
3448 | params.assoc_id == SCTP_ALL_ASSOC) | |
3449 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) | |
3450 | asoc->default_rcv_context = params.assoc_value; | |
3451 | ||
6ab792f5 ISJ |
3452 | return 0; |
3453 | } | |
3454 | ||
b6e1331f VY |
3455 | /* |
3456 | * 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE) | |
3457 | * | |
3458 | * This options will at a minimum specify if the implementation is doing | |
3459 | * fragmented interleave. Fragmented interleave, for a one to many | |
3460 | * socket, is when subsequent calls to receive a message may return | |
3461 | * parts of messages from different associations. Some implementations | |
3462 | * may allow you to turn this value on or off. If so, when turned off, | |
3463 | * no fragment interleave will occur (which will cause a head of line | |
3464 | * blocking amongst multiple associations sharing the same one to many | |
3465 | * socket). When this option is turned on, then each receive call may | |
3466 | * come from a different association (thus the user must receive data | |
3467 | * with the extended calls (e.g. sctp_recvmsg) to keep track of which | |
3468 | * association each receive belongs to. | |
3469 | * | |
3470 | * This option takes a boolean value. A non-zero value indicates that | |
3471 | * fragmented interleave is on. A value of zero indicates that | |
3472 | * fragmented interleave is off. | |
3473 | * | |
3474 | * Note that it is important that an implementation that allows this | |
3475 | * option to be turned on, have it off by default. Otherwise an unaware | |
3476 | * application using the one to many model may become confused and act | |
3477 | * incorrectly. | |
3478 | */ | |
3479 | static int sctp_setsockopt_fragment_interleave(struct sock *sk, | |
3480 | char __user *optval, | |
b7058842 | 3481 | unsigned int optlen) |
b6e1331f VY |
3482 | { |
3483 | int val; | |
3484 | ||
3485 | if (optlen != sizeof(int)) | |
3486 | return -EINVAL; | |
3487 | if (get_user(val, (int __user *)optval)) | |
3488 | return -EFAULT; | |
3489 | ||
772a5869 XL |
3490 | sctp_sk(sk)->frag_interleave = !!val; |
3491 | ||
3492 | if (!sctp_sk(sk)->frag_interleave) | |
e55f4b8b | 3493 | sctp_sk(sk)->ep->intl_enable = 0; |
b6e1331f VY |
3494 | |
3495 | return 0; | |
3496 | } | |
3497 | ||
d49d91d7 | 3498 | /* |
8510b937 | 3499 | * 8.1.21. Set or Get the SCTP Partial Delivery Point |
d49d91d7 | 3500 | * (SCTP_PARTIAL_DELIVERY_POINT) |
8510b937 | 3501 | * |
d49d91d7 VY |
3502 | * This option will set or get the SCTP partial delivery point. This |
3503 | * point is the size of a message where the partial delivery API will be | |
3504 | * invoked to help free up rwnd space for the peer. Setting this to a | |
8510b937 | 3505 | * lower value will cause partial deliveries to happen more often. The |
d49d91d7 | 3506 | * calls argument is an integer that sets or gets the partial delivery |
8510b937 WY |
3507 | * point. Note also that the call will fail if the user attempts to set |
3508 | * this value larger than the socket receive buffer size. | |
3509 | * | |
3510 | * Note that any single message having a length smaller than or equal to | |
3511 | * the SCTP partial delivery point will be delivered in one single read | |
3512 | * call as long as the user provided buffer is large enough to hold the | |
3513 | * message. | |
d49d91d7 VY |
3514 | */ |
3515 | static int sctp_setsockopt_partial_delivery_point(struct sock *sk, | |
3516 | char __user *optval, | |
b7058842 | 3517 | unsigned int optlen) |
d49d91d7 VY |
3518 | { |
3519 | u32 val; | |
3520 | ||
3521 | if (optlen != sizeof(u32)) | |
3522 | return -EINVAL; | |
3523 | if (get_user(val, (int __user *)optval)) | |
3524 | return -EFAULT; | |
3525 | ||
8510b937 WY |
3526 | /* Note: We double the receive buffer from what the user sets |
3527 | * it to be, also initial rwnd is based on rcvbuf/2. | |
3528 | */ | |
3529 | if (val > (sk->sk_rcvbuf >> 1)) | |
3530 | return -EINVAL; | |
3531 | ||
d49d91d7 VY |
3532 | sctp_sk(sk)->pd_point = val; |
3533 | ||
3534 | return 0; /* is this the right error code? */ | |
3535 | } | |
3536 | ||
70331571 VY |
3537 | /* |
3538 | * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST) | |
3539 | * | |
3540 | * This option will allow a user to change the maximum burst of packets | |
3541 | * that can be emitted by this association. Note that the default value | |
3542 | * is 4, and some implementations may restrict this setting so that it | |
3543 | * can only be lowered. | |
3544 | * | |
3545 | * NOTE: This text doesn't seem right. Do this on a socket basis with | |
3546 | * future associations inheriting the socket value. | |
3547 | */ | |
3548 | static int sctp_setsockopt_maxburst(struct sock *sk, | |
3549 | char __user *optval, | |
b7058842 | 3550 | unsigned int optlen) |
70331571 | 3551 | { |
e0651a0d | 3552 | struct sctp_sock *sp = sctp_sk(sk); |
219b99a9 | 3553 | struct sctp_assoc_value params; |
219b99a9 | 3554 | struct sctp_association *asoc; |
70331571 | 3555 | |
219b99a9 | 3556 | if (optlen == sizeof(int)) { |
94f65193 | 3557 | pr_warn_ratelimited(DEPRECATED |
f916ec96 | 3558 | "%s (pid %d) " |
94f65193 | 3559 | "Use of int in max_burst socket option deprecated.\n" |
f916ec96 NH |
3560 | "Use struct sctp_assoc_value instead\n", |
3561 | current->comm, task_pid_nr(current)); | |
e0651a0d | 3562 | if (copy_from_user(¶ms.assoc_value, optval, optlen)) |
219b99a9 | 3563 | return -EFAULT; |
e0651a0d | 3564 | params.assoc_id = SCTP_FUTURE_ASSOC; |
219b99a9 NH |
3565 | } else if (optlen == sizeof(struct sctp_assoc_value)) { |
3566 | if (copy_from_user(¶ms, optval, optlen)) | |
3567 | return -EFAULT; | |
219b99a9 | 3568 | } else |
70331571 VY |
3569 | return -EINVAL; |
3570 | ||
e0651a0d XL |
3571 | asoc = sctp_id2assoc(sk, params.assoc_id); |
3572 | if (!asoc && params.assoc_id > SCTP_ALL_ASSOC && | |
3573 | sctp_style(sk, UDP)) | |
3574 | return -EINVAL; | |
219b99a9 | 3575 | |
e0651a0d XL |
3576 | if (asoc) { |
3577 | asoc->max_burst = params.assoc_value; | |
3578 | ||
3579 | return 0; | |
3580 | } | |
3581 | ||
746bc215 XL |
3582 | if (sctp_style(sk, TCP)) |
3583 | params.assoc_id = SCTP_FUTURE_ASSOC; | |
3584 | ||
e0651a0d XL |
3585 | if (params.assoc_id == SCTP_FUTURE_ASSOC || |
3586 | params.assoc_id == SCTP_ALL_ASSOC) | |
3587 | sp->max_burst = params.assoc_value; | |
3588 | ||
3589 | if (params.assoc_id == SCTP_CURRENT_ASSOC || | |
3590 | params.assoc_id == SCTP_ALL_ASSOC) | |
3591 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) | |
3592 | asoc->max_burst = params.assoc_value; | |
70331571 VY |
3593 | |
3594 | return 0; | |
3595 | } | |
3596 | ||
65b07e5d VY |
3597 | /* |
3598 | * 7.1.18. Add a chunk that must be authenticated (SCTP_AUTH_CHUNK) | |
3599 | * | |
3600 | * This set option adds a chunk type that the user is requesting to be | |
3601 | * received only in an authenticated way. Changes to the list of chunks | |
3602 | * will only effect future associations on the socket. | |
3603 | */ | |
3604 | static int sctp_setsockopt_auth_chunk(struct sock *sk, | |
b7058842 DM |
3605 | char __user *optval, |
3606 | unsigned int optlen) | |
65b07e5d | 3607 | { |
b14878cc | 3608 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d VY |
3609 | struct sctp_authchunk val; |
3610 | ||
b14878cc | 3611 | if (!ep->auth_enable) |
5e739d17 VY |
3612 | return -EACCES; |
3613 | ||
65b07e5d VY |
3614 | if (optlen != sizeof(struct sctp_authchunk)) |
3615 | return -EINVAL; | |
3616 | if (copy_from_user(&val, optval, optlen)) | |
3617 | return -EFAULT; | |
3618 | ||
3619 | switch (val.sauth_chunk) { | |
7fd71b1e JP |
3620 | case SCTP_CID_INIT: |
3621 | case SCTP_CID_INIT_ACK: | |
3622 | case SCTP_CID_SHUTDOWN_COMPLETE: | |
3623 | case SCTP_CID_AUTH: | |
3624 | return -EINVAL; | |
65b07e5d VY |
3625 | } |
3626 | ||
3627 | /* add this chunk id to the endpoint */ | |
b14878cc | 3628 | return sctp_auth_ep_add_chunkid(ep, val.sauth_chunk); |
65b07e5d VY |
3629 | } |
3630 | ||
3631 | /* | |
3632 | * 7.1.19. Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT) | |
3633 | * | |
3634 | * This option gets or sets the list of HMAC algorithms that the local | |
3635 | * endpoint requires the peer to use. | |
3636 | */ | |
3637 | static int sctp_setsockopt_hmac_ident(struct sock *sk, | |
b7058842 DM |
3638 | char __user *optval, |
3639 | unsigned int optlen) | |
65b07e5d | 3640 | { |
b14878cc | 3641 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d | 3642 | struct sctp_hmacalgo *hmacs; |
d9724055 | 3643 | u32 idents; |
65b07e5d VY |
3644 | int err; |
3645 | ||
b14878cc | 3646 | if (!ep->auth_enable) |
5e739d17 VY |
3647 | return -EACCES; |
3648 | ||
65b07e5d VY |
3649 | if (optlen < sizeof(struct sctp_hmacalgo)) |
3650 | return -EINVAL; | |
5960cefa MRL |
3651 | optlen = min_t(unsigned int, optlen, sizeof(struct sctp_hmacalgo) + |
3652 | SCTP_AUTH_NUM_HMACS * sizeof(u16)); | |
65b07e5d | 3653 | |
cb3f837b | 3654 | hmacs = memdup_user(optval, optlen); |
934253a7 SW |
3655 | if (IS_ERR(hmacs)) |
3656 | return PTR_ERR(hmacs); | |
65b07e5d | 3657 | |
d9724055 VY |
3658 | idents = hmacs->shmac_num_idents; |
3659 | if (idents == 0 || idents > SCTP_AUTH_NUM_HMACS || | |
3660 | (idents * sizeof(u16)) > (optlen - sizeof(struct sctp_hmacalgo))) { | |
65b07e5d VY |
3661 | err = -EINVAL; |
3662 | goto out; | |
3663 | } | |
3664 | ||
b14878cc | 3665 | err = sctp_auth_ep_set_hmacs(ep, hmacs); |
65b07e5d VY |
3666 | out: |
3667 | kfree(hmacs); | |
3668 | return err; | |
3669 | } | |
3670 | ||
3671 | /* | |
3672 | * 7.1.20. Set a shared key (SCTP_AUTH_KEY) | |
3673 | * | |
3674 | * This option will set a shared secret key which is used to build an | |
3675 | * association shared key. | |
3676 | */ | |
3677 | static int sctp_setsockopt_auth_key(struct sock *sk, | |
3678 | char __user *optval, | |
b7058842 | 3679 | unsigned int optlen) |
65b07e5d | 3680 | { |
b14878cc | 3681 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d VY |
3682 | struct sctp_authkey *authkey; |
3683 | struct sctp_association *asoc; | |
7fb3be13 | 3684 | int ret = -EINVAL; |
65b07e5d VY |
3685 | |
3686 | if (optlen <= sizeof(struct sctp_authkey)) | |
3687 | return -EINVAL; | |
5960cefa MRL |
3688 | /* authkey->sca_keylength is u16, so optlen can't be bigger than |
3689 | * this. | |
3690 | */ | |
7fb3be13 | 3691 | optlen = min_t(unsigned int, optlen, USHRT_MAX + sizeof(*authkey)); |
65b07e5d | 3692 | |
cb3f837b | 3693 | authkey = memdup_user(optval, optlen); |
934253a7 SW |
3694 | if (IS_ERR(authkey)) |
3695 | return PTR_ERR(authkey); | |
65b07e5d | 3696 | |
7fb3be13 | 3697 | if (authkey->sca_keylength > optlen - sizeof(*authkey)) |
30c2235c | 3698 | goto out; |
30c2235c | 3699 | |
65b07e5d | 3700 | asoc = sctp_id2assoc(sk, authkey->sca_assoc_id); |
7fb3be13 XL |
3701 | if (!asoc && authkey->sca_assoc_id > SCTP_ALL_ASSOC && |
3702 | sctp_style(sk, UDP)) | |
65b07e5d | 3703 | goto out; |
7fb3be13 XL |
3704 | |
3705 | if (asoc) { | |
3706 | ret = sctp_auth_set_key(ep, asoc, authkey); | |
3707 | goto out; | |
3708 | } | |
3709 | ||
0685d6b7 XL |
3710 | if (sctp_style(sk, TCP)) |
3711 | authkey->sca_assoc_id = SCTP_FUTURE_ASSOC; | |
3712 | ||
7fb3be13 XL |
3713 | if (authkey->sca_assoc_id == SCTP_FUTURE_ASSOC || |
3714 | authkey->sca_assoc_id == SCTP_ALL_ASSOC) { | |
3715 | ret = sctp_auth_set_key(ep, asoc, authkey); | |
3716 | if (ret) | |
3717 | goto out; | |
3718 | } | |
3719 | ||
3720 | ret = 0; | |
3721 | ||
3722 | if (authkey->sca_assoc_id == SCTP_CURRENT_ASSOC || | |
3723 | authkey->sca_assoc_id == SCTP_ALL_ASSOC) { | |
3724 | list_for_each_entry(asoc, &ep->asocs, asocs) { | |
3725 | int res = sctp_auth_set_key(ep, asoc, authkey); | |
3726 | ||
3727 | if (res && !ret) | |
3728 | ret = res; | |
3729 | } | |
65b07e5d VY |
3730 | } |
3731 | ||
65b07e5d | 3732 | out: |
6ba542a2 | 3733 | kzfree(authkey); |
65b07e5d VY |
3734 | return ret; |
3735 | } | |
3736 | ||
3737 | /* | |
3738 | * 7.1.21. Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY) | |
3739 | * | |
3740 | * This option will get or set the active shared key to be used to build | |
3741 | * the association shared key. | |
3742 | */ | |
3743 | static int sctp_setsockopt_active_key(struct sock *sk, | |
b7058842 DM |
3744 | char __user *optval, |
3745 | unsigned int optlen) | |
65b07e5d | 3746 | { |
b14878cc | 3747 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d | 3748 | struct sctp_association *asoc; |
bf9fb6ad XL |
3749 | struct sctp_authkeyid val; |
3750 | int ret = 0; | |
65b07e5d VY |
3751 | |
3752 | if (optlen != sizeof(struct sctp_authkeyid)) | |
3753 | return -EINVAL; | |
3754 | if (copy_from_user(&val, optval, optlen)) | |
3755 | return -EFAULT; | |
3756 | ||
3757 | asoc = sctp_id2assoc(sk, val.scact_assoc_id); | |
bf9fb6ad XL |
3758 | if (!asoc && val.scact_assoc_id > SCTP_ALL_ASSOC && |
3759 | sctp_style(sk, UDP)) | |
65b07e5d VY |
3760 | return -EINVAL; |
3761 | ||
bf9fb6ad XL |
3762 | if (asoc) |
3763 | return sctp_auth_set_active_key(ep, asoc, val.scact_keynumber); | |
3764 | ||
06b39e85 XL |
3765 | if (sctp_style(sk, TCP)) |
3766 | val.scact_assoc_id = SCTP_FUTURE_ASSOC; | |
3767 | ||
bf9fb6ad XL |
3768 | if (val.scact_assoc_id == SCTP_FUTURE_ASSOC || |
3769 | val.scact_assoc_id == SCTP_ALL_ASSOC) { | |
3770 | ret = sctp_auth_set_active_key(ep, asoc, val.scact_keynumber); | |
3771 | if (ret) | |
3772 | return ret; | |
3773 | } | |
3774 | ||
3775 | if (val.scact_assoc_id == SCTP_CURRENT_ASSOC || | |
3776 | val.scact_assoc_id == SCTP_ALL_ASSOC) { | |
3777 | list_for_each_entry(asoc, &ep->asocs, asocs) { | |
3778 | int res = sctp_auth_set_active_key(ep, asoc, | |
3779 | val.scact_keynumber); | |
3780 | ||
3781 | if (res && !ret) | |
3782 | ret = res; | |
3783 | } | |
3784 | } | |
3785 | ||
3786 | return ret; | |
65b07e5d VY |
3787 | } |
3788 | ||
3789 | /* | |
3790 | * 7.1.22. Delete a shared key (SCTP_AUTH_DELETE_KEY) | |
3791 | * | |
3792 | * This set option will delete a shared secret key from use. | |
3793 | */ | |
3794 | static int sctp_setsockopt_del_key(struct sock *sk, | |
b7058842 DM |
3795 | char __user *optval, |
3796 | unsigned int optlen) | |
65b07e5d | 3797 | { |
b14878cc | 3798 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d | 3799 | struct sctp_association *asoc; |
3adcc300 XL |
3800 | struct sctp_authkeyid val; |
3801 | int ret = 0; | |
65b07e5d VY |
3802 | |
3803 | if (optlen != sizeof(struct sctp_authkeyid)) | |
3804 | return -EINVAL; | |
3805 | if (copy_from_user(&val, optval, optlen)) | |
3806 | return -EFAULT; | |
3807 | ||
3808 | asoc = sctp_id2assoc(sk, val.scact_assoc_id); | |
3adcc300 XL |
3809 | if (!asoc && val.scact_assoc_id > SCTP_ALL_ASSOC && |
3810 | sctp_style(sk, UDP)) | |
65b07e5d VY |
3811 | return -EINVAL; |
3812 | ||
3adcc300 XL |
3813 | if (asoc) |
3814 | return sctp_auth_del_key_id(ep, asoc, val.scact_keynumber); | |
65b07e5d | 3815 | |
220675eb XL |
3816 | if (sctp_style(sk, TCP)) |
3817 | val.scact_assoc_id = SCTP_FUTURE_ASSOC; | |
3818 | ||
3adcc300 XL |
3819 | if (val.scact_assoc_id == SCTP_FUTURE_ASSOC || |
3820 | val.scact_assoc_id == SCTP_ALL_ASSOC) { | |
3821 | ret = sctp_auth_del_key_id(ep, asoc, val.scact_keynumber); | |
3822 | if (ret) | |
3823 | return ret; | |
3824 | } | |
3825 | ||
3826 | if (val.scact_assoc_id == SCTP_CURRENT_ASSOC || | |
3827 | val.scact_assoc_id == SCTP_ALL_ASSOC) { | |
3828 | list_for_each_entry(asoc, &ep->asocs, asocs) { | |
3829 | int res = sctp_auth_del_key_id(ep, asoc, | |
3830 | val.scact_keynumber); | |
3831 | ||
3832 | if (res && !ret) | |
3833 | ret = res; | |
3834 | } | |
3835 | } | |
3836 | ||
3837 | return ret; | |
65b07e5d VY |
3838 | } |
3839 | ||
601590ec XL |
3840 | /* |
3841 | * 8.3.4 Deactivate a Shared Key (SCTP_AUTH_DEACTIVATE_KEY) | |
3842 | * | |
3843 | * This set option will deactivate a shared secret key. | |
3844 | */ | |
3845 | static int sctp_setsockopt_deactivate_key(struct sock *sk, char __user *optval, | |
3846 | unsigned int optlen) | |
3847 | { | |
3848 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; | |
601590ec | 3849 | struct sctp_association *asoc; |
2af66ff3 XL |
3850 | struct sctp_authkeyid val; |
3851 | int ret = 0; | |
601590ec | 3852 | |
601590ec XL |
3853 | if (optlen != sizeof(struct sctp_authkeyid)) |
3854 | return -EINVAL; | |
3855 | if (copy_from_user(&val, optval, optlen)) | |
3856 | return -EFAULT; | |
3857 | ||
3858 | asoc = sctp_id2assoc(sk, val.scact_assoc_id); | |
2af66ff3 XL |
3859 | if (!asoc && val.scact_assoc_id > SCTP_ALL_ASSOC && |
3860 | sctp_style(sk, UDP)) | |
601590ec XL |
3861 | return -EINVAL; |
3862 | ||
2af66ff3 XL |
3863 | if (asoc) |
3864 | return sctp_auth_deact_key_id(ep, asoc, val.scact_keynumber); | |
3865 | ||
200f3a3b XL |
3866 | if (sctp_style(sk, TCP)) |
3867 | val.scact_assoc_id = SCTP_FUTURE_ASSOC; | |
3868 | ||
2af66ff3 XL |
3869 | if (val.scact_assoc_id == SCTP_FUTURE_ASSOC || |
3870 | val.scact_assoc_id == SCTP_ALL_ASSOC) { | |
3871 | ret = sctp_auth_deact_key_id(ep, asoc, val.scact_keynumber); | |
3872 | if (ret) | |
3873 | return ret; | |
3874 | } | |
3875 | ||
3876 | if (val.scact_assoc_id == SCTP_CURRENT_ASSOC || | |
3877 | val.scact_assoc_id == SCTP_ALL_ASSOC) { | |
3878 | list_for_each_entry(asoc, &ep->asocs, asocs) { | |
3879 | int res = sctp_auth_deact_key_id(ep, asoc, | |
3880 | val.scact_keynumber); | |
3881 | ||
3882 | if (res && !ret) | |
3883 | ret = res; | |
3884 | } | |
3885 | } | |
3886 | ||
3887 | return ret; | |
601590ec XL |
3888 | } |
3889 | ||
7dc04d71 MH |
3890 | /* |
3891 | * 8.1.23 SCTP_AUTO_ASCONF | |
3892 | * | |
3893 | * This option will enable or disable the use of the automatic generation of | |
3894 | * ASCONF chunks to add and delete addresses to an existing association. Note | |
3895 | * that this option has two caveats namely: a) it only affects sockets that | |
3896 | * are bound to all addresses available to the SCTP stack, and b) the system | |
3897 | * administrator may have an overriding control that turns the ASCONF feature | |
3898 | * off no matter what setting the socket option may have. | |
3899 | * This option expects an integer boolean flag, where a non-zero value turns on | |
3900 | * the option, and a zero value turns off the option. | |
3901 | * Note. In this implementation, socket operation overrides default parameter | |
3902 | * being set by sysctl as well as FreeBSD implementation | |
3903 | */ | |
3904 | static int sctp_setsockopt_auto_asconf(struct sock *sk, char __user *optval, | |
3905 | unsigned int optlen) | |
3906 | { | |
3907 | int val; | |
3908 | struct sctp_sock *sp = sctp_sk(sk); | |
3909 | ||
3910 | if (optlen < sizeof(int)) | |
3911 | return -EINVAL; | |
3912 | if (get_user(val, (int __user *)optval)) | |
3913 | return -EFAULT; | |
3914 | if (!sctp_is_ep_boundall(sk) && val) | |
3915 | return -EINVAL; | |
3916 | if ((val && sp->do_auto_asconf) || (!val && !sp->do_auto_asconf)) | |
3917 | return 0; | |
3918 | ||
2d45a02d | 3919 | spin_lock_bh(&sock_net(sk)->sctp.addr_wq_lock); |
7dc04d71 MH |
3920 | if (val == 0 && sp->do_auto_asconf) { |
3921 | list_del(&sp->auto_asconf_list); | |
3922 | sp->do_auto_asconf = 0; | |
3923 | } else if (val && !sp->do_auto_asconf) { | |
3924 | list_add_tail(&sp->auto_asconf_list, | |
4db67e80 | 3925 | &sock_net(sk)->sctp.auto_asconf_splist); |
7dc04d71 MH |
3926 | sp->do_auto_asconf = 1; |
3927 | } | |
2d45a02d | 3928 | spin_unlock_bh(&sock_net(sk)->sctp.addr_wq_lock); |
7dc04d71 MH |
3929 | return 0; |
3930 | } | |
3931 | ||
5aa93bcf NH |
3932 | /* |
3933 | * SCTP_PEER_ADDR_THLDS | |
3934 | * | |
3935 | * This option allows us to alter the partially failed threshold for one or all | |
3936 | * transports in an association. See Section 6.1 of: | |
3937 | * http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txt | |
3938 | */ | |
3939 | static int sctp_setsockopt_paddr_thresholds(struct sock *sk, | |
3940 | char __user *optval, | |
d467ac0a | 3941 | unsigned int optlen, bool v2) |
5aa93bcf | 3942 | { |
d467ac0a | 3943 | struct sctp_paddrthlds_v2 val; |
5aa93bcf NH |
3944 | struct sctp_transport *trans; |
3945 | struct sctp_association *asoc; | |
d467ac0a | 3946 | int len; |
5aa93bcf | 3947 | |
d467ac0a XL |
3948 | len = v2 ? sizeof(val) : sizeof(struct sctp_paddrthlds); |
3949 | if (optlen < len) | |
5aa93bcf | 3950 | return -EINVAL; |
d467ac0a | 3951 | if (copy_from_user(&val, optval, len)) |
5aa93bcf NH |
3952 | return -EFAULT; |
3953 | ||
d467ac0a XL |
3954 | if (v2 && val.spt_pathpfthld > val.spt_pathcpthld) |
3955 | return -EINVAL; | |
3956 | ||
8add543e XL |
3957 | if (!sctp_is_any(sk, (const union sctp_addr *)&val.spt_address)) { |
3958 | trans = sctp_addr_id2transport(sk, &val.spt_address, | |
3959 | val.spt_assoc_id); | |
3960 | if (!trans) | |
5aa93bcf | 3961 | return -ENOENT; |
8add543e XL |
3962 | |
3963 | if (val.spt_pathmaxrxt) | |
3964 | trans->pathmaxrxt = val.spt_pathmaxrxt; | |
d467ac0a XL |
3965 | if (v2) |
3966 | trans->ps_retrans = val.spt_pathcpthld; | |
8add543e XL |
3967 | trans->pf_retrans = val.spt_pathpfthld; |
3968 | ||
3969 | return 0; | |
3970 | } | |
3971 | ||
3972 | asoc = sctp_id2assoc(sk, val.spt_assoc_id); | |
3973 | if (!asoc && val.spt_assoc_id != SCTP_FUTURE_ASSOC && | |
3974 | sctp_style(sk, UDP)) | |
3975 | return -EINVAL; | |
3976 | ||
3977 | if (asoc) { | |
5aa93bcf NH |
3978 | list_for_each_entry(trans, &asoc->peer.transport_addr_list, |
3979 | transports) { | |
3980 | if (val.spt_pathmaxrxt) | |
3981 | trans->pathmaxrxt = val.spt_pathmaxrxt; | |
d467ac0a XL |
3982 | if (v2) |
3983 | trans->ps_retrans = val.spt_pathcpthld; | |
5aa93bcf NH |
3984 | trans->pf_retrans = val.spt_pathpfthld; |
3985 | } | |
3986 | ||
3987 | if (val.spt_pathmaxrxt) | |
3988 | asoc->pathmaxrxt = val.spt_pathmaxrxt; | |
d467ac0a XL |
3989 | if (v2) |
3990 | asoc->ps_retrans = val.spt_pathcpthld; | |
5aa93bcf NH |
3991 | asoc->pf_retrans = val.spt_pathpfthld; |
3992 | } else { | |
8add543e | 3993 | struct sctp_sock *sp = sctp_sk(sk); |
5aa93bcf NH |
3994 | |
3995 | if (val.spt_pathmaxrxt) | |
8add543e | 3996 | sp->pathmaxrxt = val.spt_pathmaxrxt; |
d467ac0a XL |
3997 | if (v2) |
3998 | sp->ps_retrans = val.spt_pathcpthld; | |
8add543e | 3999 | sp->pf_retrans = val.spt_pathpfthld; |
5aa93bcf NH |
4000 | } |
4001 | ||
4002 | return 0; | |
4003 | } | |
4004 | ||
0d3a421d GOV |
4005 | static int sctp_setsockopt_recvrcvinfo(struct sock *sk, |
4006 | char __user *optval, | |
4007 | unsigned int optlen) | |
4008 | { | |
4009 | int val; | |
4010 | ||
4011 | if (optlen < sizeof(int)) | |
4012 | return -EINVAL; | |
4013 | if (get_user(val, (int __user *) optval)) | |
4014 | return -EFAULT; | |
4015 | ||
4016 | sctp_sk(sk)->recvrcvinfo = (val == 0) ? 0 : 1; | |
4017 | ||
4018 | return 0; | |
4019 | } | |
4020 | ||
2347c80f GOV |
4021 | static int sctp_setsockopt_recvnxtinfo(struct sock *sk, |
4022 | char __user *optval, | |
4023 | unsigned int optlen) | |
4024 | { | |
4025 | int val; | |
4026 | ||
4027 | if (optlen < sizeof(int)) | |
4028 | return -EINVAL; | |
4029 | if (get_user(val, (int __user *) optval)) | |
4030 | return -EFAULT; | |
4031 | ||
4032 | sctp_sk(sk)->recvnxtinfo = (val == 0) ? 0 : 1; | |
4033 | ||
4034 | return 0; | |
4035 | } | |
4036 | ||
28aa4c26 XL |
4037 | static int sctp_setsockopt_pr_supported(struct sock *sk, |
4038 | char __user *optval, | |
4039 | unsigned int optlen) | |
4040 | { | |
4041 | struct sctp_assoc_value params; | |
fb195605 | 4042 | struct sctp_association *asoc; |
28aa4c26 XL |
4043 | |
4044 | if (optlen != sizeof(params)) | |
cc3ccf26 | 4045 | return -EINVAL; |
28aa4c26 | 4046 | |
cc3ccf26 XL |
4047 | if (copy_from_user(¶ms, optval, optlen)) |
4048 | return -EFAULT; | |
28aa4c26 | 4049 | |
fb195605 XL |
4050 | asoc = sctp_id2assoc(sk, params.assoc_id); |
4051 | if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC && | |
4052 | sctp_style(sk, UDP)) | |
4053 | return -EINVAL; | |
4054 | ||
cc3ccf26 | 4055 | sctp_sk(sk)->ep->prsctp_enable = !!params.assoc_value; |
28aa4c26 | 4056 | |
cc3ccf26 | 4057 | return 0; |
28aa4c26 XL |
4058 | } |
4059 | ||
f959fb44 XL |
4060 | static int sctp_setsockopt_default_prinfo(struct sock *sk, |
4061 | char __user *optval, | |
4062 | unsigned int optlen) | |
4063 | { | |
3a583059 | 4064 | struct sctp_sock *sp = sctp_sk(sk); |
f959fb44 XL |
4065 | struct sctp_default_prinfo info; |
4066 | struct sctp_association *asoc; | |
4067 | int retval = -EINVAL; | |
4068 | ||
4069 | if (optlen != sizeof(info)) | |
4070 | goto out; | |
4071 | ||
4072 | if (copy_from_user(&info, optval, sizeof(info))) { | |
4073 | retval = -EFAULT; | |
4074 | goto out; | |
4075 | } | |
4076 | ||
4077 | if (info.pr_policy & ~SCTP_PR_SCTP_MASK) | |
4078 | goto out; | |
4079 | ||
4080 | if (info.pr_policy == SCTP_PR_SCTP_NONE) | |
4081 | info.pr_value = 0; | |
4082 | ||
4083 | asoc = sctp_id2assoc(sk, info.pr_assoc_id); | |
3a583059 XL |
4084 | if (!asoc && info.pr_assoc_id > SCTP_ALL_ASSOC && |
4085 | sctp_style(sk, UDP)) | |
4086 | goto out; | |
4087 | ||
4088 | retval = 0; | |
4089 | ||
f959fb44 XL |
4090 | if (asoc) { |
4091 | SCTP_PR_SET_POLICY(asoc->default_flags, info.pr_policy); | |
4092 | asoc->default_timetolive = info.pr_value; | |
3a583059 XL |
4093 | goto out; |
4094 | } | |
f959fb44 | 4095 | |
cbb45c6c XL |
4096 | if (sctp_style(sk, TCP)) |
4097 | info.pr_assoc_id = SCTP_FUTURE_ASSOC; | |
4098 | ||
3a583059 XL |
4099 | if (info.pr_assoc_id == SCTP_FUTURE_ASSOC || |
4100 | info.pr_assoc_id == SCTP_ALL_ASSOC) { | |
f959fb44 XL |
4101 | SCTP_PR_SET_POLICY(sp->default_flags, info.pr_policy); |
4102 | sp->default_timetolive = info.pr_value; | |
f959fb44 XL |
4103 | } |
4104 | ||
3a583059 XL |
4105 | if (info.pr_assoc_id == SCTP_CURRENT_ASSOC || |
4106 | info.pr_assoc_id == SCTP_ALL_ASSOC) { | |
4107 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) { | |
4108 | SCTP_PR_SET_POLICY(asoc->default_flags, info.pr_policy); | |
4109 | asoc->default_timetolive = info.pr_value; | |
4110 | } | |
4111 | } | |
f959fb44 XL |
4112 | |
4113 | out: | |
4114 | return retval; | |
4115 | } | |
4116 | ||
c0d8bab6 XL |
4117 | static int sctp_setsockopt_reconfig_supported(struct sock *sk, |
4118 | char __user *optval, | |
4119 | unsigned int optlen) | |
4120 | { | |
4121 | struct sctp_assoc_value params; | |
4122 | struct sctp_association *asoc; | |
4123 | int retval = -EINVAL; | |
4124 | ||
4125 | if (optlen != sizeof(params)) | |
4126 | goto out; | |
4127 | ||
4128 | if (copy_from_user(¶ms, optval, optlen)) { | |
4129 | retval = -EFAULT; | |
4130 | goto out; | |
4131 | } | |
4132 | ||
4133 | asoc = sctp_id2assoc(sk, params.assoc_id); | |
acce7f3b XL |
4134 | if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC && |
4135 | sctp_style(sk, UDP)) | |
c0d8bab6 | 4136 | goto out; |
acce7f3b | 4137 | |
a96701fb | 4138 | sctp_sk(sk)->ep->reconf_enable = !!params.assoc_value; |
c0d8bab6 XL |
4139 | |
4140 | retval = 0; | |
4141 | ||
4142 | out: | |
4143 | return retval; | |
4144 | } | |
4145 | ||
9fb657ae XL |
4146 | static int sctp_setsockopt_enable_strreset(struct sock *sk, |
4147 | char __user *optval, | |
4148 | unsigned int optlen) | |
4149 | { | |
99a62135 | 4150 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
9fb657ae XL |
4151 | struct sctp_assoc_value params; |
4152 | struct sctp_association *asoc; | |
4153 | int retval = -EINVAL; | |
4154 | ||
4155 | if (optlen != sizeof(params)) | |
4156 | goto out; | |
4157 | ||
4158 | if (copy_from_user(¶ms, optval, optlen)) { | |
4159 | retval = -EFAULT; | |
4160 | goto out; | |
4161 | } | |
4162 | ||
4163 | if (params.assoc_value & (~SCTP_ENABLE_STRRESET_MASK)) | |
4164 | goto out; | |
4165 | ||
4166 | asoc = sctp_id2assoc(sk, params.assoc_id); | |
99a62135 XL |
4167 | if (!asoc && params.assoc_id > SCTP_ALL_ASSOC && |
4168 | sctp_style(sk, UDP)) | |
4169 | goto out; | |
4170 | ||
4171 | retval = 0; | |
4172 | ||
9fb657ae XL |
4173 | if (asoc) { |
4174 | asoc->strreset_enable = params.assoc_value; | |
9fb657ae XL |
4175 | goto out; |
4176 | } | |
4177 | ||
9430ff99 XL |
4178 | if (sctp_style(sk, TCP)) |
4179 | params.assoc_id = SCTP_FUTURE_ASSOC; | |
4180 | ||
99a62135 XL |
4181 | if (params.assoc_id == SCTP_FUTURE_ASSOC || |
4182 | params.assoc_id == SCTP_ALL_ASSOC) | |
4183 | ep->strreset_enable = params.assoc_value; | |
4184 | ||
4185 | if (params.assoc_id == SCTP_CURRENT_ASSOC || | |
4186 | params.assoc_id == SCTP_ALL_ASSOC) | |
4187 | list_for_each_entry(asoc, &ep->asocs, asocs) | |
4188 | asoc->strreset_enable = params.assoc_value; | |
9fb657ae XL |
4189 | |
4190 | out: | |
4191 | return retval; | |
4192 | } | |
4193 | ||
7f9d68ac XL |
4194 | static int sctp_setsockopt_reset_streams(struct sock *sk, |
4195 | char __user *optval, | |
4196 | unsigned int optlen) | |
4197 | { | |
4198 | struct sctp_reset_streams *params; | |
4199 | struct sctp_association *asoc; | |
4200 | int retval = -EINVAL; | |
4201 | ||
2342b8d9 | 4202 | if (optlen < sizeof(*params)) |
7f9d68ac | 4203 | return -EINVAL; |
5960cefa MRL |
4204 | /* srs_number_streams is u16, so optlen can't be bigger than this. */ |
4205 | optlen = min_t(unsigned int, optlen, USHRT_MAX + | |
4206 | sizeof(__u16) * sizeof(*params)); | |
7f9d68ac XL |
4207 | |
4208 | params = memdup_user(optval, optlen); | |
4209 | if (IS_ERR(params)) | |
4210 | return PTR_ERR(params); | |
4211 | ||
2342b8d9 XL |
4212 | if (params->srs_number_streams * sizeof(__u16) > |
4213 | optlen - sizeof(*params)) | |
4214 | goto out; | |
4215 | ||
7f9d68ac XL |
4216 | asoc = sctp_id2assoc(sk, params->srs_assoc_id); |
4217 | if (!asoc) | |
4218 | goto out; | |
4219 | ||
4220 | retval = sctp_send_reset_streams(asoc, params); | |
4221 | ||
4222 | out: | |
4223 | kfree(params); | |
4224 | return retval; | |
4225 | } | |
4226 | ||
a92ce1a4 XL |
4227 | static int sctp_setsockopt_reset_assoc(struct sock *sk, |
4228 | char __user *optval, | |
4229 | unsigned int optlen) | |
4230 | { | |
4231 | struct sctp_association *asoc; | |
4232 | sctp_assoc_t associd; | |
4233 | int retval = -EINVAL; | |
4234 | ||
4235 | if (optlen != sizeof(associd)) | |
4236 | goto out; | |
4237 | ||
4238 | if (copy_from_user(&associd, optval, optlen)) { | |
4239 | retval = -EFAULT; | |
4240 | goto out; | |
4241 | } | |
4242 | ||
4243 | asoc = sctp_id2assoc(sk, associd); | |
4244 | if (!asoc) | |
4245 | goto out; | |
4246 | ||
4247 | retval = sctp_send_reset_assoc(asoc); | |
4248 | ||
4249 | out: | |
4250 | return retval; | |
4251 | } | |
4252 | ||
242bd2d5 XL |
4253 | static int sctp_setsockopt_add_streams(struct sock *sk, |
4254 | char __user *optval, | |
4255 | unsigned int optlen) | |
4256 | { | |
4257 | struct sctp_association *asoc; | |
4258 | struct sctp_add_streams params; | |
4259 | int retval = -EINVAL; | |
4260 | ||
4261 | if (optlen != sizeof(params)) | |
4262 | goto out; | |
4263 | ||
4264 | if (copy_from_user(¶ms, optval, optlen)) { | |
4265 | retval = -EFAULT; | |
4266 | goto out; | |
4267 | } | |
4268 | ||
4269 | asoc = sctp_id2assoc(sk, params.sas_assoc_id); | |
4270 | if (!asoc) | |
4271 | goto out; | |
4272 | ||
4273 | retval = sctp_send_add_streams(asoc, ¶ms); | |
4274 | ||
4275 | out: | |
4276 | return retval; | |
4277 | } | |
4278 | ||
13aa8770 MRL |
4279 | static int sctp_setsockopt_scheduler(struct sock *sk, |
4280 | char __user *optval, | |
4281 | unsigned int optlen) | |
4282 | { | |
7efba10d | 4283 | struct sctp_sock *sp = sctp_sk(sk); |
13aa8770 MRL |
4284 | struct sctp_association *asoc; |
4285 | struct sctp_assoc_value params; | |
7efba10d | 4286 | int retval = 0; |
13aa8770 MRL |
4287 | |
4288 | if (optlen < sizeof(params)) | |
7efba10d | 4289 | return -EINVAL; |
13aa8770 MRL |
4290 | |
4291 | optlen = sizeof(params); | |
7efba10d XL |
4292 | if (copy_from_user(¶ms, optval, optlen)) |
4293 | return -EFAULT; | |
13aa8770 MRL |
4294 | |
4295 | if (params.assoc_value > SCTP_SS_MAX) | |
7efba10d | 4296 | return -EINVAL; |
13aa8770 MRL |
4297 | |
4298 | asoc = sctp_id2assoc(sk, params.assoc_id); | |
7efba10d XL |
4299 | if (!asoc && params.assoc_id > SCTP_ALL_ASSOC && |
4300 | sctp_style(sk, UDP)) | |
4301 | return -EINVAL; | |
13aa8770 | 4302 | |
7efba10d XL |
4303 | if (asoc) |
4304 | return sctp_sched_set_sched(asoc, params.assoc_value); | |
4305 | ||
b59c19d9 XL |
4306 | if (sctp_style(sk, TCP)) |
4307 | params.assoc_id = SCTP_FUTURE_ASSOC; | |
4308 | ||
7efba10d XL |
4309 | if (params.assoc_id == SCTP_FUTURE_ASSOC || |
4310 | params.assoc_id == SCTP_ALL_ASSOC) | |
4311 | sp->default_ss = params.assoc_value; | |
4312 | ||
4313 | if (params.assoc_id == SCTP_CURRENT_ASSOC || | |
4314 | params.assoc_id == SCTP_ALL_ASSOC) { | |
4315 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) { | |
4316 | int ret = sctp_sched_set_sched(asoc, | |
4317 | params.assoc_value); | |
4318 | ||
4319 | if (ret && !retval) | |
4320 | retval = ret; | |
4321 | } | |
4322 | } | |
13aa8770 | 4323 | |
13aa8770 MRL |
4324 | return retval; |
4325 | } | |
4326 | ||
0ccdf3c7 MRL |
4327 | static int sctp_setsockopt_scheduler_value(struct sock *sk, |
4328 | char __user *optval, | |
4329 | unsigned int optlen) | |
4330 | { | |
0ccdf3c7 | 4331 | struct sctp_stream_value params; |
e7f28248 | 4332 | struct sctp_association *asoc; |
0ccdf3c7 MRL |
4333 | int retval = -EINVAL; |
4334 | ||
4335 | if (optlen < sizeof(params)) | |
4336 | goto out; | |
4337 | ||
4338 | optlen = sizeof(params); | |
4339 | if (copy_from_user(¶ms, optval, optlen)) { | |
4340 | retval = -EFAULT; | |
4341 | goto out; | |
4342 | } | |
4343 | ||
4344 | asoc = sctp_id2assoc(sk, params.assoc_id); | |
e7f28248 XL |
4345 | if (!asoc && params.assoc_id != SCTP_CURRENT_ASSOC && |
4346 | sctp_style(sk, UDP)) | |
0ccdf3c7 MRL |
4347 | goto out; |
4348 | ||
e7f28248 XL |
4349 | if (asoc) { |
4350 | retval = sctp_sched_set_value(asoc, params.stream_id, | |
4351 | params.stream_value, GFP_KERNEL); | |
4352 | goto out; | |
4353 | } | |
4354 | ||
4355 | retval = 0; | |
4356 | ||
4357 | list_for_each_entry(asoc, &sctp_sk(sk)->ep->asocs, asocs) { | |
4358 | int ret = sctp_sched_set_value(asoc, params.stream_id, | |
4359 | params.stream_value, GFP_KERNEL); | |
4360 | if (ret && !retval) /* try to return the 1st error. */ | |
4361 | retval = ret; | |
4362 | } | |
0ccdf3c7 MRL |
4363 | |
4364 | out: | |
4365 | return retval; | |
4366 | } | |
4367 | ||
772a5869 XL |
4368 | static int sctp_setsockopt_interleaving_supported(struct sock *sk, |
4369 | char __user *optval, | |
4370 | unsigned int optlen) | |
4371 | { | |
4372 | struct sctp_sock *sp = sctp_sk(sk); | |
772a5869 | 4373 | struct sctp_assoc_value params; |
2e7709d1 | 4374 | struct sctp_association *asoc; |
772a5869 XL |
4375 | int retval = -EINVAL; |
4376 | ||
4377 | if (optlen < sizeof(params)) | |
4378 | goto out; | |
4379 | ||
4380 | optlen = sizeof(params); | |
4381 | if (copy_from_user(¶ms, optval, optlen)) { | |
4382 | retval = -EFAULT; | |
4383 | goto out; | |
4384 | } | |
4385 | ||
2e7709d1 XL |
4386 | asoc = sctp_id2assoc(sk, params.assoc_id); |
4387 | if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC && | |
4388 | sctp_style(sk, UDP)) | |
772a5869 XL |
4389 | goto out; |
4390 | ||
2e7709d1 | 4391 | if (!sock_net(sk)->sctp.intl_enable || !sp->frag_interleave) { |
772a5869 XL |
4392 | retval = -EPERM; |
4393 | goto out; | |
4394 | } | |
4395 | ||
e55f4b8b | 4396 | sp->ep->intl_enable = !!params.assoc_value; |
772a5869 XL |
4397 | |
4398 | retval = 0; | |
4399 | ||
4400 | out: | |
4401 | return retval; | |
4402 | } | |
4403 | ||
b0e9a2fe XL |
4404 | static int sctp_setsockopt_reuse_port(struct sock *sk, char __user *optval, |
4405 | unsigned int optlen) | |
4406 | { | |
4407 | int val; | |
4408 | ||
4409 | if (!sctp_style(sk, TCP)) | |
4410 | return -EOPNOTSUPP; | |
4411 | ||
4412 | if (sctp_sk(sk)->ep->base.bind_addr.port) | |
4413 | return -EFAULT; | |
4414 | ||
4415 | if (optlen < sizeof(int)) | |
4416 | return -EINVAL; | |
4417 | ||
4418 | if (get_user(val, (int __user *)optval)) | |
4419 | return -EFAULT; | |
4420 | ||
4421 | sctp_sk(sk)->reuse = !!val; | |
4422 | ||
4423 | return 0; | |
4424 | } | |
4425 | ||
d251f05e XL |
4426 | static int sctp_assoc_ulpevent_type_set(struct sctp_event *param, |
4427 | struct sctp_association *asoc) | |
4428 | { | |
4429 | struct sctp_ulpevent *event; | |
4430 | ||
4431 | sctp_ulpevent_type_set(&asoc->subscribe, param->se_type, param->se_on); | |
4432 | ||
4433 | if (param->se_type == SCTP_SENDER_DRY_EVENT && param->se_on) { | |
4434 | if (sctp_outq_is_empty(&asoc->outqueue)) { | |
4435 | event = sctp_ulpevent_make_sender_dry_event(asoc, | |
4436 | GFP_USER | __GFP_NOWARN); | |
4437 | if (!event) | |
4438 | return -ENOMEM; | |
4439 | ||
4440 | asoc->stream.si->enqueue_event(&asoc->ulpq, event); | |
4441 | } | |
4442 | } | |
4443 | ||
4444 | return 0; | |
4445 | } | |
4446 | ||
480ba9c1 XL |
4447 | static int sctp_setsockopt_event(struct sock *sk, char __user *optval, |
4448 | unsigned int optlen) | |
4449 | { | |
d251f05e | 4450 | struct sctp_sock *sp = sctp_sk(sk); |
480ba9c1 | 4451 | struct sctp_association *asoc; |
480ba9c1 XL |
4452 | struct sctp_event param; |
4453 | int retval = 0; | |
4454 | ||
d251f05e XL |
4455 | if (optlen < sizeof(param)) |
4456 | return -EINVAL; | |
480ba9c1 XL |
4457 | |
4458 | optlen = sizeof(param); | |
d251f05e XL |
4459 | if (copy_from_user(¶m, optval, optlen)) |
4460 | return -EFAULT; | |
480ba9c1 XL |
4461 | |
4462 | if (param.se_type < SCTP_SN_TYPE_BASE || | |
d251f05e XL |
4463 | param.se_type > SCTP_SN_TYPE_MAX) |
4464 | return -EINVAL; | |
480ba9c1 XL |
4465 | |
4466 | asoc = sctp_id2assoc(sk, param.se_assoc_id); | |
d251f05e XL |
4467 | if (!asoc && param.se_assoc_id > SCTP_ALL_ASSOC && |
4468 | sctp_style(sk, UDP)) | |
4469 | return -EINVAL; | |
480ba9c1 | 4470 | |
d251f05e XL |
4471 | if (asoc) |
4472 | return sctp_assoc_ulpevent_type_set(¶m, asoc); | |
480ba9c1 | 4473 | |
99518619 XL |
4474 | if (sctp_style(sk, TCP)) |
4475 | param.se_assoc_id = SCTP_FUTURE_ASSOC; | |
4476 | ||
d251f05e XL |
4477 | if (param.se_assoc_id == SCTP_FUTURE_ASSOC || |
4478 | param.se_assoc_id == SCTP_ALL_ASSOC) | |
4479 | sctp_ulpevent_type_set(&sp->subscribe, | |
4480 | param.se_type, param.se_on); | |
480ba9c1 | 4481 | |
d251f05e XL |
4482 | if (param.se_assoc_id == SCTP_CURRENT_ASSOC || |
4483 | param.se_assoc_id == SCTP_ALL_ASSOC) { | |
4484 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) { | |
4485 | int ret = sctp_assoc_ulpevent_type_set(¶m, asoc); | |
4486 | ||
4487 | if (ret && !retval) | |
4488 | retval = ret; | |
480ba9c1 XL |
4489 | } |
4490 | } | |
4491 | ||
480ba9c1 XL |
4492 | return retval; |
4493 | } | |
4494 | ||
df2c71ff XL |
4495 | static int sctp_setsockopt_asconf_supported(struct sock *sk, |
4496 | char __user *optval, | |
4497 | unsigned int optlen) | |
4498 | { | |
4499 | struct sctp_assoc_value params; | |
4500 | struct sctp_association *asoc; | |
4501 | struct sctp_endpoint *ep; | |
4502 | int retval = -EINVAL; | |
4503 | ||
4504 | if (optlen != sizeof(params)) | |
4505 | goto out; | |
4506 | ||
4507 | if (copy_from_user(¶ms, optval, optlen)) { | |
4508 | retval = -EFAULT; | |
4509 | goto out; | |
4510 | } | |
4511 | ||
4512 | asoc = sctp_id2assoc(sk, params.assoc_id); | |
4513 | if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC && | |
4514 | sctp_style(sk, UDP)) | |
4515 | goto out; | |
4516 | ||
4517 | ep = sctp_sk(sk)->ep; | |
4518 | ep->asconf_enable = !!params.assoc_value; | |
4519 | ||
4520 | if (ep->asconf_enable && ep->auth_enable) { | |
4521 | sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF); | |
4522 | sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF_ACK); | |
4523 | } | |
4524 | ||
4525 | retval = 0; | |
4526 | ||
4527 | out: | |
4528 | return retval; | |
4529 | } | |
4530 | ||
56dd525a XL |
4531 | static int sctp_setsockopt_auth_supported(struct sock *sk, |
4532 | char __user *optval, | |
4533 | unsigned int optlen) | |
4534 | { | |
4535 | struct sctp_assoc_value params; | |
4536 | struct sctp_association *asoc; | |
4537 | struct sctp_endpoint *ep; | |
4538 | int retval = -EINVAL; | |
4539 | ||
4540 | if (optlen != sizeof(params)) | |
4541 | goto out; | |
4542 | ||
4543 | if (copy_from_user(¶ms, optval, optlen)) { | |
4544 | retval = -EFAULT; | |
4545 | goto out; | |
4546 | } | |
4547 | ||
4548 | asoc = sctp_id2assoc(sk, params.assoc_id); | |
4549 | if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC && | |
4550 | sctp_style(sk, UDP)) | |
4551 | goto out; | |
4552 | ||
4553 | ep = sctp_sk(sk)->ep; | |
4554 | if (params.assoc_value) { | |
4555 | retval = sctp_auth_init(ep, GFP_KERNEL); | |
4556 | if (retval) | |
4557 | goto out; | |
4558 | if (ep->asconf_enable) { | |
4559 | sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF); | |
4560 | sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF_ACK); | |
4561 | } | |
4562 | } | |
4563 | ||
4564 | ep->auth_enable = !!params.assoc_value; | |
4565 | retval = 0; | |
4566 | ||
4567 | out: | |
4568 | return retval; | |
4569 | } | |
4570 | ||
d5886b91 XL |
4571 | static int sctp_setsockopt_ecn_supported(struct sock *sk, |
4572 | char __user *optval, | |
4573 | unsigned int optlen) | |
4574 | { | |
4575 | struct sctp_assoc_value params; | |
4576 | struct sctp_association *asoc; | |
4577 | int retval = -EINVAL; | |
4578 | ||
4579 | if (optlen != sizeof(params)) | |
4580 | goto out; | |
4581 | ||
4582 | if (copy_from_user(¶ms, optval, optlen)) { | |
4583 | retval = -EFAULT; | |
4584 | goto out; | |
4585 | } | |
4586 | ||
4587 | asoc = sctp_id2assoc(sk, params.assoc_id); | |
4588 | if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC && | |
4589 | sctp_style(sk, UDP)) | |
4590 | goto out; | |
4591 | ||
4592 | sctp_sk(sk)->ep->ecn_enable = !!params.assoc_value; | |
4593 | retval = 0; | |
4594 | ||
4595 | out: | |
4596 | return retval; | |
4597 | } | |
4598 | ||
8d2a6935 XL |
4599 | static int sctp_setsockopt_pf_expose(struct sock *sk, |
4600 | char __user *optval, | |
4601 | unsigned int optlen) | |
4602 | { | |
4603 | struct sctp_assoc_value params; | |
4604 | struct sctp_association *asoc; | |
4605 | int retval = -EINVAL; | |
4606 | ||
4607 | if (optlen != sizeof(params)) | |
4608 | goto out; | |
4609 | ||
4610 | if (copy_from_user(¶ms, optval, optlen)) { | |
4611 | retval = -EFAULT; | |
4612 | goto out; | |
4613 | } | |
4614 | ||
4615 | if (params.assoc_value > SCTP_PF_EXPOSE_MAX) | |
4616 | goto out; | |
4617 | ||
4618 | asoc = sctp_id2assoc(sk, params.assoc_id); | |
4619 | if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC && | |
4620 | sctp_style(sk, UDP)) | |
4621 | goto out; | |
4622 | ||
4623 | if (asoc) | |
4624 | asoc->pf_expose = params.assoc_value; | |
4625 | else | |
4626 | sctp_sk(sk)->pf_expose = params.assoc_value; | |
4627 | retval = 0; | |
4628 | ||
4629 | out: | |
4630 | return retval; | |
4631 | } | |
4632 | ||
1da177e4 LT |
4633 | /* API 6.2 setsockopt(), getsockopt() |
4634 | * | |
4635 | * Applications use setsockopt() and getsockopt() to set or retrieve | |
4636 | * socket options. Socket options are used to change the default | |
4637 | * behavior of sockets calls. They are described in Section 7. | |
4638 | * | |
4639 | * The syntax is: | |
4640 | * | |
4641 | * ret = getsockopt(int sd, int level, int optname, void __user *optval, | |
4642 | * int __user *optlen); | |
4643 | * ret = setsockopt(int sd, int level, int optname, const void __user *optval, | |
4644 | * int optlen); | |
4645 | * | |
4646 | * sd - the socket descript. | |
4647 | * level - set to IPPROTO_SCTP for all SCTP options. | |
4648 | * optname - the option name. | |
4649 | * optval - the buffer to store the value of the option. | |
4650 | * optlen - the size of the buffer. | |
4651 | */ | |
dda91928 DB |
4652 | static int sctp_setsockopt(struct sock *sk, int level, int optname, |
4653 | char __user *optval, unsigned int optlen) | |
1da177e4 | 4654 | { |
ca84bd05 | 4655 | void *kopt = NULL; |
1da177e4 LT |
4656 | int retval = 0; |
4657 | ||
bb33381d | 4658 | pr_debug("%s: sk:%p, optname:%d\n", __func__, sk, optname); |
1da177e4 LT |
4659 | |
4660 | /* I can hardly begin to describe how wrong this is. This is | |
4661 | * so broken as to be worse than useless. The API draft | |
4662 | * REALLY is NOT helpful here... I am not convinced that the | |
4663 | * semantics of setsockopt() with a level OTHER THAN SOL_SCTP | |
4664 | * are at all well-founded. | |
4665 | */ | |
4666 | if (level != SOL_SCTP) { | |
4667 | struct sctp_af *af = sctp_sk(sk)->pf->af; | |
4668 | retval = af->setsockopt(sk, level, optname, optval, optlen); | |
4669 | goto out_nounlock; | |
4670 | } | |
4671 | ||
ca84bd05 CH |
4672 | if (optlen > 0) { |
4673 | kopt = memdup_user(optval, optlen); | |
4674 | if (IS_ERR(kopt)) | |
4675 | return PTR_ERR(kopt); | |
4676 | } | |
4677 | ||
048ed4b6 | 4678 | lock_sock(sk); |
1da177e4 LT |
4679 | |
4680 | switch (optname) { | |
4681 | case SCTP_SOCKOPT_BINDX_ADD: | |
4682 | /* 'optlen' is the size of the addresses buffer. */ | |
8c7517f5 CH |
4683 | retval = sctp_setsockopt_bindx(sk, kopt, optlen, |
4684 | SCTP_BINDX_ADD_ADDR); | |
1da177e4 LT |
4685 | break; |
4686 | ||
4687 | case SCTP_SOCKOPT_BINDX_REM: | |
4688 | /* 'optlen' is the size of the addresses buffer. */ | |
8c7517f5 CH |
4689 | retval = sctp_setsockopt_bindx(sk, kopt, optlen, |
4690 | SCTP_BINDX_REM_ADDR); | |
1da177e4 LT |
4691 | break; |
4692 | ||
88a0a948 VY |
4693 | case SCTP_SOCKOPT_CONNECTX_OLD: |
4694 | /* 'optlen' is the size of the addresses buffer. */ | |
ce5b2f89 | 4695 | retval = sctp_setsockopt_connectx_old(sk, kopt, optlen); |
88a0a948 VY |
4696 | break; |
4697 | ||
3f7a87d2 FF |
4698 | case SCTP_SOCKOPT_CONNECTX: |
4699 | /* 'optlen' is the size of the addresses buffer. */ | |
ce5b2f89 | 4700 | retval = sctp_setsockopt_connectx(sk, kopt, optlen); |
3f7a87d2 FF |
4701 | break; |
4702 | ||
1da177e4 LT |
4703 | case SCTP_DISABLE_FRAGMENTS: |
4704 | retval = sctp_setsockopt_disable_fragments(sk, optval, optlen); | |
4705 | break; | |
4706 | ||
4707 | case SCTP_EVENTS: | |
4708 | retval = sctp_setsockopt_events(sk, optval, optlen); | |
4709 | break; | |
4710 | ||
4711 | case SCTP_AUTOCLOSE: | |
4712 | retval = sctp_setsockopt_autoclose(sk, optval, optlen); | |
4713 | break; | |
4714 | ||
4715 | case SCTP_PEER_ADDR_PARAMS: | |
4716 | retval = sctp_setsockopt_peer_addr_params(sk, optval, optlen); | |
4717 | break; | |
4718 | ||
4580ccc0 | 4719 | case SCTP_DELAYED_SACK: |
d364d927 | 4720 | retval = sctp_setsockopt_delayed_ack(sk, optval, optlen); |
7708610b | 4721 | break; |
d49d91d7 VY |
4722 | case SCTP_PARTIAL_DELIVERY_POINT: |
4723 | retval = sctp_setsockopt_partial_delivery_point(sk, optval, optlen); | |
4724 | break; | |
7708610b | 4725 | |
1da177e4 LT |
4726 | case SCTP_INITMSG: |
4727 | retval = sctp_setsockopt_initmsg(sk, optval, optlen); | |
4728 | break; | |
4729 | case SCTP_DEFAULT_SEND_PARAM: | |
4730 | retval = sctp_setsockopt_default_send_param(sk, optval, | |
4731 | optlen); | |
4732 | break; | |
6b3fd5f3 GOV |
4733 | case SCTP_DEFAULT_SNDINFO: |
4734 | retval = sctp_setsockopt_default_sndinfo(sk, optval, optlen); | |
4735 | break; | |
1da177e4 LT |
4736 | case SCTP_PRIMARY_ADDR: |
4737 | retval = sctp_setsockopt_primary_addr(sk, optval, optlen); | |
4738 | break; | |
4739 | case SCTP_SET_PEER_PRIMARY_ADDR: | |
4740 | retval = sctp_setsockopt_peer_primary_addr(sk, optval, optlen); | |
4741 | break; | |
4742 | case SCTP_NODELAY: | |
4743 | retval = sctp_setsockopt_nodelay(sk, optval, optlen); | |
4744 | break; | |
4745 | case SCTP_RTOINFO: | |
4746 | retval = sctp_setsockopt_rtoinfo(sk, optval, optlen); | |
4747 | break; | |
4748 | case SCTP_ASSOCINFO: | |
4749 | retval = sctp_setsockopt_associnfo(sk, optval, optlen); | |
4750 | break; | |
4751 | case SCTP_I_WANT_MAPPED_V4_ADDR: | |
4752 | retval = sctp_setsockopt_mappedv4(sk, optval, optlen); | |
4753 | break; | |
4754 | case SCTP_MAXSEG: | |
4755 | retval = sctp_setsockopt_maxseg(sk, optval, optlen); | |
4756 | break; | |
0f3fffd8 ISJ |
4757 | case SCTP_ADAPTATION_LAYER: |
4758 | retval = sctp_setsockopt_adaptation_layer(sk, optval, optlen); | |
1da177e4 | 4759 | break; |
6ab792f5 ISJ |
4760 | case SCTP_CONTEXT: |
4761 | retval = sctp_setsockopt_context(sk, optval, optlen); | |
4762 | break; | |
b6e1331f VY |
4763 | case SCTP_FRAGMENT_INTERLEAVE: |
4764 | retval = sctp_setsockopt_fragment_interleave(sk, optval, optlen); | |
4765 | break; | |
70331571 VY |
4766 | case SCTP_MAX_BURST: |
4767 | retval = sctp_setsockopt_maxburst(sk, optval, optlen); | |
4768 | break; | |
65b07e5d VY |
4769 | case SCTP_AUTH_CHUNK: |
4770 | retval = sctp_setsockopt_auth_chunk(sk, optval, optlen); | |
4771 | break; | |
4772 | case SCTP_HMAC_IDENT: | |
4773 | retval = sctp_setsockopt_hmac_ident(sk, optval, optlen); | |
4774 | break; | |
4775 | case SCTP_AUTH_KEY: | |
4776 | retval = sctp_setsockopt_auth_key(sk, optval, optlen); | |
4777 | break; | |
4778 | case SCTP_AUTH_ACTIVE_KEY: | |
4779 | retval = sctp_setsockopt_active_key(sk, optval, optlen); | |
4780 | break; | |
4781 | case SCTP_AUTH_DELETE_KEY: | |
4782 | retval = sctp_setsockopt_del_key(sk, optval, optlen); | |
4783 | break; | |
601590ec XL |
4784 | case SCTP_AUTH_DEACTIVATE_KEY: |
4785 | retval = sctp_setsockopt_deactivate_key(sk, optval, optlen); | |
4786 | break; | |
7dc04d71 MH |
4787 | case SCTP_AUTO_ASCONF: |
4788 | retval = sctp_setsockopt_auto_asconf(sk, optval, optlen); | |
4789 | break; | |
5aa93bcf | 4790 | case SCTP_PEER_ADDR_THLDS: |
d467ac0a XL |
4791 | retval = sctp_setsockopt_paddr_thresholds(sk, optval, optlen, |
4792 | false); | |
4793 | break; | |
4794 | case SCTP_PEER_ADDR_THLDS_V2: | |
4795 | retval = sctp_setsockopt_paddr_thresholds(sk, optval, optlen, | |
4796 | true); | |
5aa93bcf | 4797 | break; |
0d3a421d GOV |
4798 | case SCTP_RECVRCVINFO: |
4799 | retval = sctp_setsockopt_recvrcvinfo(sk, optval, optlen); | |
4800 | break; | |
2347c80f GOV |
4801 | case SCTP_RECVNXTINFO: |
4802 | retval = sctp_setsockopt_recvnxtinfo(sk, optval, optlen); | |
4803 | break; | |
28aa4c26 XL |
4804 | case SCTP_PR_SUPPORTED: |
4805 | retval = sctp_setsockopt_pr_supported(sk, optval, optlen); | |
4806 | break; | |
f959fb44 XL |
4807 | case SCTP_DEFAULT_PRINFO: |
4808 | retval = sctp_setsockopt_default_prinfo(sk, optval, optlen); | |
4809 | break; | |
c0d8bab6 XL |
4810 | case SCTP_RECONFIG_SUPPORTED: |
4811 | retval = sctp_setsockopt_reconfig_supported(sk, optval, optlen); | |
4812 | break; | |
9fb657ae XL |
4813 | case SCTP_ENABLE_STREAM_RESET: |
4814 | retval = sctp_setsockopt_enable_strreset(sk, optval, optlen); | |
4815 | break; | |
7f9d68ac XL |
4816 | case SCTP_RESET_STREAMS: |
4817 | retval = sctp_setsockopt_reset_streams(sk, optval, optlen); | |
4818 | break; | |
a92ce1a4 XL |
4819 | case SCTP_RESET_ASSOC: |
4820 | retval = sctp_setsockopt_reset_assoc(sk, optval, optlen); | |
4821 | break; | |
242bd2d5 XL |
4822 | case SCTP_ADD_STREAMS: |
4823 | retval = sctp_setsockopt_add_streams(sk, optval, optlen); | |
4824 | break; | |
13aa8770 MRL |
4825 | case SCTP_STREAM_SCHEDULER: |
4826 | retval = sctp_setsockopt_scheduler(sk, optval, optlen); | |
4827 | break; | |
0ccdf3c7 MRL |
4828 | case SCTP_STREAM_SCHEDULER_VALUE: |
4829 | retval = sctp_setsockopt_scheduler_value(sk, optval, optlen); | |
4830 | break; | |
772a5869 XL |
4831 | case SCTP_INTERLEAVING_SUPPORTED: |
4832 | retval = sctp_setsockopt_interleaving_supported(sk, optval, | |
4833 | optlen); | |
4834 | break; | |
b0e9a2fe XL |
4835 | case SCTP_REUSE_PORT: |
4836 | retval = sctp_setsockopt_reuse_port(sk, optval, optlen); | |
4837 | break; | |
480ba9c1 XL |
4838 | case SCTP_EVENT: |
4839 | retval = sctp_setsockopt_event(sk, optval, optlen); | |
4840 | break; | |
df2c71ff XL |
4841 | case SCTP_ASCONF_SUPPORTED: |
4842 | retval = sctp_setsockopt_asconf_supported(sk, optval, optlen); | |
4843 | break; | |
56dd525a XL |
4844 | case SCTP_AUTH_SUPPORTED: |
4845 | retval = sctp_setsockopt_auth_supported(sk, optval, optlen); | |
4846 | break; | |
d5886b91 XL |
4847 | case SCTP_ECN_SUPPORTED: |
4848 | retval = sctp_setsockopt_ecn_supported(sk, optval, optlen); | |
4849 | break; | |
8d2a6935 XL |
4850 | case SCTP_EXPOSE_POTENTIALLY_FAILED_STATE: |
4851 | retval = sctp_setsockopt_pf_expose(sk, optval, optlen); | |
4852 | break; | |
1da177e4 LT |
4853 | default: |
4854 | retval = -ENOPROTOOPT; | |
4855 | break; | |
3ff50b79 | 4856 | } |
1da177e4 | 4857 | |
048ed4b6 | 4858 | release_sock(sk); |
ca84bd05 | 4859 | kfree(kopt); |
1da177e4 LT |
4860 | |
4861 | out_nounlock: | |
4862 | return retval; | |
4863 | } | |
4864 | ||
4865 | /* API 3.1.6 connect() - UDP Style Syntax | |
4866 | * | |
4867 | * An application may use the connect() call in the UDP model to initiate an | |
4868 | * association without sending data. | |
4869 | * | |
4870 | * The syntax is: | |
4871 | * | |
4872 | * ret = connect(int sd, const struct sockaddr *nam, socklen_t len); | |
4873 | * | |
4874 | * sd: the socket descriptor to have a new association added to. | |
4875 | * | |
4876 | * nam: the address structure (either struct sockaddr_in or struct | |
4877 | * sockaddr_in6 defined in RFC2553 [7]). | |
4878 | * | |
4879 | * len: the size of the address. | |
4880 | */ | |
dda91928 | 4881 | static int sctp_connect(struct sock *sk, struct sockaddr *addr, |
644fbdea | 4882 | int addr_len, int flags) |
1da177e4 | 4883 | { |
3f7a87d2 | 4884 | struct sctp_af *af; |
9b6c0887 | 4885 | int err = -EINVAL; |
1da177e4 | 4886 | |
048ed4b6 | 4887 | lock_sock(sk); |
bb33381d DB |
4888 | pr_debug("%s: sk:%p, sockaddr:%p, addr_len:%d\n", __func__, sk, |
4889 | addr, addr_len); | |
1da177e4 | 4890 | |
3f7a87d2 | 4891 | /* Validate addr_len before calling common connect/connectx routine. */ |
9b6c0887 XL |
4892 | af = sctp_get_af_specific(addr->sa_family); |
4893 | if (af && addr_len >= af->sockaddr_len) | |
644fbdea | 4894 | err = __sctp_connect(sk, addr, af->sockaddr_len, flags, NULL); |
1da177e4 | 4895 | |
048ed4b6 | 4896 | release_sock(sk); |
1da177e4 LT |
4897 | return err; |
4898 | } | |
4899 | ||
644fbdea XL |
4900 | int sctp_inet_connect(struct socket *sock, struct sockaddr *uaddr, |
4901 | int addr_len, int flags) | |
4902 | { | |
4903 | if (addr_len < sizeof(uaddr->sa_family)) | |
4904 | return -EINVAL; | |
4905 | ||
4906 | if (uaddr->sa_family == AF_UNSPEC) | |
4907 | return -EOPNOTSUPP; | |
4908 | ||
4909 | return sctp_connect(sock->sk, uaddr, addr_len, flags); | |
4910 | } | |
4911 | ||
1da177e4 | 4912 | /* FIXME: Write comments. */ |
dda91928 | 4913 | static int sctp_disconnect(struct sock *sk, int flags) |
1da177e4 LT |
4914 | { |
4915 | return -EOPNOTSUPP; /* STUB */ | |
4916 | } | |
4917 | ||
4918 | /* 4.1.4 accept() - TCP Style Syntax | |
4919 | * | |
4920 | * Applications use accept() call to remove an established SCTP | |
4921 | * association from the accept queue of the endpoint. A new socket | |
4922 | * descriptor will be returned from accept() to represent the newly | |
4923 | * formed association. | |
4924 | */ | |
cdfbabfb | 4925 | static struct sock *sctp_accept(struct sock *sk, int flags, int *err, bool kern) |
1da177e4 LT |
4926 | { |
4927 | struct sctp_sock *sp; | |
4928 | struct sctp_endpoint *ep; | |
4929 | struct sock *newsk = NULL; | |
4930 | struct sctp_association *asoc; | |
4931 | long timeo; | |
4932 | int error = 0; | |
4933 | ||
048ed4b6 | 4934 | lock_sock(sk); |
1da177e4 LT |
4935 | |
4936 | sp = sctp_sk(sk); | |
4937 | ep = sp->ep; | |
4938 | ||
4939 | if (!sctp_style(sk, TCP)) { | |
4940 | error = -EOPNOTSUPP; | |
4941 | goto out; | |
4942 | } | |
4943 | ||
4944 | if (!sctp_sstate(sk, LISTENING)) { | |
4945 | error = -EINVAL; | |
4946 | goto out; | |
4947 | } | |
4948 | ||
8abfedd8 | 4949 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
1da177e4 LT |
4950 | |
4951 | error = sctp_wait_for_accept(sk, timeo); | |
4952 | if (error) | |
4953 | goto out; | |
4954 | ||
4955 | /* We treat the list of associations on the endpoint as the accept | |
4956 | * queue and pick the first association on the list. | |
4957 | */ | |
4958 | asoc = list_entry(ep->asocs.next, struct sctp_association, asocs); | |
4959 | ||
cdfbabfb | 4960 | newsk = sp->pf->create_accept_sk(sk, asoc, kern); |
1da177e4 LT |
4961 | if (!newsk) { |
4962 | error = -ENOMEM; | |
4963 | goto out; | |
4964 | } | |
4965 | ||
4966 | /* Populate the fields of the newsk from the oldsk and migrate the | |
4967 | * asoc to the newsk. | |
4968 | */ | |
89664c62 XL |
4969 | error = sctp_sock_migrate(sk, newsk, asoc, SCTP_SOCKET_TCP); |
4970 | if (error) { | |
4971 | sk_common_release(newsk); | |
4972 | newsk = NULL; | |
4973 | } | |
1da177e4 LT |
4974 | |
4975 | out: | |
048ed4b6 | 4976 | release_sock(sk); |
d808ad9a | 4977 | *err = error; |
1da177e4 LT |
4978 | return newsk; |
4979 | } | |
4980 | ||
4981 | /* The SCTP ioctl handler. */ | |
dda91928 | 4982 | static int sctp_ioctl(struct sock *sk, int cmd, unsigned long arg) |
1da177e4 | 4983 | { |
65040c33 DEFP |
4984 | int rc = -ENOTCONN; |
4985 | ||
048ed4b6 | 4986 | lock_sock(sk); |
65040c33 DEFP |
4987 | |
4988 | /* | |
4989 | * SEQPACKET-style sockets in LISTENING state are valid, for | |
4990 | * SCTP, so only discard TCP-style sockets in LISTENING state. | |
4991 | */ | |
4992 | if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING)) | |
4993 | goto out; | |
4994 | ||
4995 | switch (cmd) { | |
4996 | case SIOCINQ: { | |
4997 | struct sk_buff *skb; | |
4998 | unsigned int amount = 0; | |
4999 | ||
5000 | skb = skb_peek(&sk->sk_receive_queue); | |
5001 | if (skb != NULL) { | |
5002 | /* | |
5003 | * We will only return the amount of this packet since | |
5004 | * that is all that will be read. | |
5005 | */ | |
5006 | amount = skb->len; | |
5007 | } | |
5008 | rc = put_user(amount, (int __user *)arg); | |
65040c33 | 5009 | break; |
9a7241c2 | 5010 | } |
65040c33 DEFP |
5011 | default: |
5012 | rc = -ENOIOCTLCMD; | |
5013 | break; | |
5014 | } | |
5015 | out: | |
048ed4b6 | 5016 | release_sock(sk); |
65040c33 | 5017 | return rc; |
1da177e4 LT |
5018 | } |
5019 | ||
5020 | /* This is the function which gets called during socket creation to | |
5021 | * initialized the SCTP-specific portion of the sock. | |
5022 | * The sock structure should already be zero-filled memory. | |
5023 | */ | |
dda91928 | 5024 | static int sctp_init_sock(struct sock *sk) |
1da177e4 | 5025 | { |
e1fc3b14 | 5026 | struct net *net = sock_net(sk); |
1da177e4 LT |
5027 | struct sctp_sock *sp; |
5028 | ||
bb33381d | 5029 | pr_debug("%s: sk:%p\n", __func__, sk); |
1da177e4 LT |
5030 | |
5031 | sp = sctp_sk(sk); | |
5032 | ||
5033 | /* Initialize the SCTP per socket area. */ | |
5034 | switch (sk->sk_type) { | |
5035 | case SOCK_SEQPACKET: | |
5036 | sp->type = SCTP_SOCKET_UDP; | |
5037 | break; | |
5038 | case SOCK_STREAM: | |
5039 | sp->type = SCTP_SOCKET_TCP; | |
5040 | break; | |
5041 | default: | |
5042 | return -ESOCKTNOSUPPORT; | |
5043 | } | |
5044 | ||
90017acc MRL |
5045 | sk->sk_gso_type = SKB_GSO_SCTP; |
5046 | ||
1da177e4 LT |
5047 | /* Initialize default send parameters. These parameters can be |
5048 | * modified with the SCTP_DEFAULT_SEND_PARAM socket option. | |
5049 | */ | |
5050 | sp->default_stream = 0; | |
5051 | sp->default_ppid = 0; | |
5052 | sp->default_flags = 0; | |
5053 | sp->default_context = 0; | |
5054 | sp->default_timetolive = 0; | |
5055 | ||
6ab792f5 | 5056 | sp->default_rcv_context = 0; |
e1fc3b14 | 5057 | sp->max_burst = net->sctp.max_burst; |
6ab792f5 | 5058 | |
3c68198e NH |
5059 | sp->sctp_hmac_alg = net->sctp.sctp_hmac_alg; |
5060 | ||
1da177e4 LT |
5061 | /* Initialize default setup parameters. These parameters |
5062 | * can be modified with the SCTP_INITMSG socket option or | |
5063 | * overridden by the SCTP_INIT CMSG. | |
5064 | */ | |
5065 | sp->initmsg.sinit_num_ostreams = sctp_max_outstreams; | |
5066 | sp->initmsg.sinit_max_instreams = sctp_max_instreams; | |
e1fc3b14 EB |
5067 | sp->initmsg.sinit_max_attempts = net->sctp.max_retrans_init; |
5068 | sp->initmsg.sinit_max_init_timeo = net->sctp.rto_max; | |
1da177e4 LT |
5069 | |
5070 | /* Initialize default RTO related parameters. These parameters can | |
5071 | * be modified for with the SCTP_RTOINFO socket option. | |
5072 | */ | |
e1fc3b14 EB |
5073 | sp->rtoinfo.srto_initial = net->sctp.rto_initial; |
5074 | sp->rtoinfo.srto_max = net->sctp.rto_max; | |
5075 | sp->rtoinfo.srto_min = net->sctp.rto_min; | |
1da177e4 LT |
5076 | |
5077 | /* Initialize default association related parameters. These parameters | |
5078 | * can be modified with the SCTP_ASSOCINFO socket option. | |
5079 | */ | |
e1fc3b14 | 5080 | sp->assocparams.sasoc_asocmaxrxt = net->sctp.max_retrans_association; |
1da177e4 LT |
5081 | sp->assocparams.sasoc_number_peer_destinations = 0; |
5082 | sp->assocparams.sasoc_peer_rwnd = 0; | |
5083 | sp->assocparams.sasoc_local_rwnd = 0; | |
e1fc3b14 | 5084 | sp->assocparams.sasoc_cookie_life = net->sctp.valid_cookie_life; |
1da177e4 LT |
5085 | |
5086 | /* Initialize default event subscriptions. By default, all the | |
d808ad9a | 5087 | * options are off. |
1da177e4 | 5088 | */ |
2cc0eeb6 | 5089 | sp->subscribe = 0; |
1da177e4 LT |
5090 | |
5091 | /* Default Peer Address Parameters. These defaults can | |
5092 | * be modified via SCTP_PEER_ADDR_PARAMS | |
5093 | */ | |
e1fc3b14 EB |
5094 | sp->hbinterval = net->sctp.hb_interval; |
5095 | sp->pathmaxrxt = net->sctp.max_retrans_path; | |
8add543e | 5096 | sp->pf_retrans = net->sctp.pf_retrans; |
34515e94 | 5097 | sp->ps_retrans = net->sctp.ps_retrans; |
aef587be | 5098 | sp->pf_expose = net->sctp.pf_expose; |
4e2d52bf | 5099 | sp->pathmtu = 0; /* allow default discovery */ |
e1fc3b14 | 5100 | sp->sackdelay = net->sctp.sack_timeout; |
7bfe8bdb | 5101 | sp->sackfreq = 2; |
52ccb8e9 | 5102 | sp->param_flags = SPP_HB_ENABLE | |
d808ad9a YH |
5103 | SPP_PMTUD_ENABLE | |
5104 | SPP_SACKDELAY_ENABLE; | |
7efba10d | 5105 | sp->default_ss = SCTP_SS_DEFAULT; |
1da177e4 LT |
5106 | |
5107 | /* If enabled no SCTP message fragmentation will be performed. | |
5108 | * Configure through SCTP_DISABLE_FRAGMENTS socket option. | |
5109 | */ | |
5110 | sp->disable_fragments = 0; | |
5111 | ||
208edef6 SS |
5112 | /* Enable Nagle algorithm by default. */ |
5113 | sp->nodelay = 0; | |
1da177e4 | 5114 | |
0d3a421d | 5115 | sp->recvrcvinfo = 0; |
2347c80f | 5116 | sp->recvnxtinfo = 0; |
0d3a421d | 5117 | |
1da177e4 LT |
5118 | /* Enable by default. */ |
5119 | sp->v4mapped = 1; | |
5120 | ||
5121 | /* Auto-close idle associations after the configured | |
5122 | * number of seconds. A value of 0 disables this | |
5123 | * feature. Configure through the SCTP_AUTOCLOSE socket option, | |
5124 | * for UDP-style sockets only. | |
5125 | */ | |
5126 | sp->autoclose = 0; | |
5127 | ||
5128 | /* User specified fragmentation limit. */ | |
5129 | sp->user_frag = 0; | |
5130 | ||
0f3fffd8 | 5131 | sp->adaptation_ind = 0; |
1da177e4 LT |
5132 | |
5133 | sp->pf = sctp_get_pf_specific(sk->sk_family); | |
5134 | ||
5135 | /* Control variables for partial data delivery. */ | |
b6e1331f | 5136 | atomic_set(&sp->pd_mode, 0); |
1da177e4 | 5137 | skb_queue_head_init(&sp->pd_lobby); |
b6e1331f | 5138 | sp->frag_interleave = 0; |
1da177e4 LT |
5139 | |
5140 | /* Create a per socket endpoint structure. Even if we | |
5141 | * change the data structure relationships, this may still | |
5142 | * be useful for storing pre-connect address information. | |
5143 | */ | |
c164b838 DB |
5144 | sp->ep = sctp_endpoint_new(sk, GFP_KERNEL); |
5145 | if (!sp->ep) | |
1da177e4 LT |
5146 | return -ENOMEM; |
5147 | ||
1da177e4 LT |
5148 | sp->hmac = NULL; |
5149 | ||
0a2fbac1 DB |
5150 | sk->sk_destruct = sctp_destruct_sock; |
5151 | ||
1da177e4 | 5152 | SCTP_DBG_OBJCNT_INC(sock); |
6f756a8c DM |
5153 | |
5154 | local_bh_disable(); | |
8cb38a60 | 5155 | sk_sockets_allocated_inc(sk); |
e1fc3b14 | 5156 | sock_prot_inuse_add(net, sk->sk_prot, 1); |
2d45a02d MRL |
5157 | |
5158 | /* Nothing can fail after this block, otherwise | |
5159 | * sctp_destroy_sock() will be called without addr_wq_lock held | |
5160 | */ | |
e1fc3b14 | 5161 | if (net->sctp.default_auto_asconf) { |
2d45a02d | 5162 | spin_lock(&sock_net(sk)->sctp.addr_wq_lock); |
9f7d653b | 5163 | list_add_tail(&sp->auto_asconf_list, |
e1fc3b14 | 5164 | &net->sctp.auto_asconf_splist); |
9f7d653b | 5165 | sp->do_auto_asconf = 1; |
2d45a02d MRL |
5166 | spin_unlock(&sock_net(sk)->sctp.addr_wq_lock); |
5167 | } else { | |
9f7d653b | 5168 | sp->do_auto_asconf = 0; |
2d45a02d MRL |
5169 | } |
5170 | ||
6f756a8c DM |
5171 | local_bh_enable(); |
5172 | ||
1da177e4 LT |
5173 | return 0; |
5174 | } | |
5175 | ||
2d45a02d MRL |
5176 | /* Cleanup any SCTP per socket resources. Must be called with |
5177 | * sock_net(sk)->sctp.addr_wq_lock held if sp->do_auto_asconf is true | |
5178 | */ | |
dda91928 | 5179 | static void sctp_destroy_sock(struct sock *sk) |
1da177e4 | 5180 | { |
9f7d653b | 5181 | struct sctp_sock *sp; |
1da177e4 | 5182 | |
bb33381d | 5183 | pr_debug("%s: sk:%p\n", __func__, sk); |
1da177e4 LT |
5184 | |
5185 | /* Release our hold on the endpoint. */ | |
9f7d653b | 5186 | sp = sctp_sk(sk); |
1abd165e DB |
5187 | /* This could happen during socket init, thus we bail out |
5188 | * early, since the rest of the below is not setup either. | |
5189 | */ | |
5190 | if (sp->ep == NULL) | |
5191 | return; | |
5192 | ||
9f7d653b MH |
5193 | if (sp->do_auto_asconf) { |
5194 | sp->do_auto_asconf = 0; | |
5195 | list_del(&sp->auto_asconf_list); | |
5196 | } | |
5197 | sctp_endpoint_free(sp->ep); | |
5bc0b3bf | 5198 | local_bh_disable(); |
8cb38a60 | 5199 | sk_sockets_allocated_dec(sk); |
9a57f7fa | 5200 | sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); |
5bc0b3bf | 5201 | local_bh_enable(); |
1da177e4 LT |
5202 | } |
5203 | ||
0a2fbac1 DB |
5204 | /* Triggered when there are no references on the socket anymore */ |
5205 | static void sctp_destruct_sock(struct sock *sk) | |
5206 | { | |
5207 | struct sctp_sock *sp = sctp_sk(sk); | |
5208 | ||
5209 | /* Free up the HMAC transform. */ | |
5821c769 | 5210 | crypto_free_shash(sp->hmac); |
0a2fbac1 DB |
5211 | |
5212 | inet_sock_destruct(sk); | |
5213 | } | |
5214 | ||
1da177e4 LT |
5215 | /* API 4.1.7 shutdown() - TCP Style Syntax |
5216 | * int shutdown(int socket, int how); | |
5217 | * | |
5218 | * sd - the socket descriptor of the association to be closed. | |
5219 | * how - Specifies the type of shutdown. The values are | |
5220 | * as follows: | |
5221 | * SHUT_RD | |
5222 | * Disables further receive operations. No SCTP | |
5223 | * protocol action is taken. | |
5224 | * SHUT_WR | |
5225 | * Disables further send operations, and initiates | |
5226 | * the SCTP shutdown sequence. | |
5227 | * SHUT_RDWR | |
5228 | * Disables further send and receive operations | |
5229 | * and initiates the SCTP shutdown sequence. | |
5230 | */ | |
dda91928 | 5231 | static void sctp_shutdown(struct sock *sk, int how) |
1da177e4 | 5232 | { |
55e26eb9 | 5233 | struct net *net = sock_net(sk); |
1da177e4 | 5234 | struct sctp_endpoint *ep; |
1da177e4 LT |
5235 | |
5236 | if (!sctp_style(sk, TCP)) | |
5237 | return; | |
5238 | ||
5bf35ddf XL |
5239 | ep = sctp_sk(sk)->ep; |
5240 | if (how & SEND_SHUTDOWN && !list_empty(&ep->asocs)) { | |
5241 | struct sctp_association *asoc; | |
5242 | ||
cbabf463 | 5243 | inet_sk_set_state(sk, SCTP_SS_CLOSING); |
5bf35ddf XL |
5244 | asoc = list_entry(ep->asocs.next, |
5245 | struct sctp_association, asocs); | |
5246 | sctp_primitive_SHUTDOWN(net, asoc, NULL); | |
1da177e4 LT |
5247 | } |
5248 | } | |
5249 | ||
52c52a61 XL |
5250 | int sctp_get_sctp_info(struct sock *sk, struct sctp_association *asoc, |
5251 | struct sctp_info *info) | |
5252 | { | |
5253 | struct sctp_transport *prim; | |
5254 | struct list_head *pos; | |
5255 | int mask; | |
5256 | ||
5257 | memset(info, 0, sizeof(*info)); | |
5258 | if (!asoc) { | |
5259 | struct sctp_sock *sp = sctp_sk(sk); | |
5260 | ||
5261 | info->sctpi_s_autoclose = sp->autoclose; | |
5262 | info->sctpi_s_adaptation_ind = sp->adaptation_ind; | |
5263 | info->sctpi_s_pd_point = sp->pd_point; | |
5264 | info->sctpi_s_nodelay = sp->nodelay; | |
5265 | info->sctpi_s_disable_fragments = sp->disable_fragments; | |
5266 | info->sctpi_s_v4mapped = sp->v4mapped; | |
5267 | info->sctpi_s_frag_interleave = sp->frag_interleave; | |
40eb90e9 | 5268 | info->sctpi_s_type = sp->type; |
52c52a61 XL |
5269 | |
5270 | return 0; | |
5271 | } | |
5272 | ||
5273 | info->sctpi_tag = asoc->c.my_vtag; | |
5274 | info->sctpi_state = asoc->state; | |
5275 | info->sctpi_rwnd = asoc->a_rwnd; | |
5276 | info->sctpi_unackdata = asoc->unack_data; | |
5277 | info->sctpi_penddata = sctp_tsnmap_pending(&asoc->peer.tsn_map); | |
cee360ab XL |
5278 | info->sctpi_instrms = asoc->stream.incnt; |
5279 | info->sctpi_outstrms = asoc->stream.outcnt; | |
52c52a61 XL |
5280 | list_for_each(pos, &asoc->base.inqueue.in_chunk_list) |
5281 | info->sctpi_inqueue++; | |
5282 | list_for_each(pos, &asoc->outqueue.out_chunk_list) | |
5283 | info->sctpi_outqueue++; | |
5284 | info->sctpi_overall_error = asoc->overall_error_count; | |
5285 | info->sctpi_max_burst = asoc->max_burst; | |
5286 | info->sctpi_maxseg = asoc->frag_point; | |
5287 | info->sctpi_peer_rwnd = asoc->peer.rwnd; | |
5288 | info->sctpi_peer_tag = asoc->c.peer_vtag; | |
5289 | ||
5290 | mask = asoc->peer.ecn_capable << 1; | |
5291 | mask = (mask | asoc->peer.ipv4_address) << 1; | |
5292 | mask = (mask | asoc->peer.ipv6_address) << 1; | |
5293 | mask = (mask | asoc->peer.hostname_address) << 1; | |
5294 | mask = (mask | asoc->peer.asconf_capable) << 1; | |
5295 | mask = (mask | asoc->peer.prsctp_capable) << 1; | |
5296 | mask = (mask | asoc->peer.auth_capable); | |
5297 | info->sctpi_peer_capable = mask; | |
5298 | mask = asoc->peer.sack_needed << 1; | |
5299 | mask = (mask | asoc->peer.sack_generation) << 1; | |
5300 | mask = (mask | asoc->peer.zero_window_announced); | |
5301 | info->sctpi_peer_sack = mask; | |
5302 | ||
5303 | info->sctpi_isacks = asoc->stats.isacks; | |
5304 | info->sctpi_osacks = asoc->stats.osacks; | |
5305 | info->sctpi_opackets = asoc->stats.opackets; | |
5306 | info->sctpi_ipackets = asoc->stats.ipackets; | |
5307 | info->sctpi_rtxchunks = asoc->stats.rtxchunks; | |
5308 | info->sctpi_outofseqtsns = asoc->stats.outofseqtsns; | |
5309 | info->sctpi_idupchunks = asoc->stats.idupchunks; | |
5310 | info->sctpi_gapcnt = asoc->stats.gapcnt; | |
5311 | info->sctpi_ouodchunks = asoc->stats.ouodchunks; | |
5312 | info->sctpi_iuodchunks = asoc->stats.iuodchunks; | |
5313 | info->sctpi_oodchunks = asoc->stats.oodchunks; | |
5314 | info->sctpi_iodchunks = asoc->stats.iodchunks; | |
5315 | info->sctpi_octrlchunks = asoc->stats.octrlchunks; | |
5316 | info->sctpi_ictrlchunks = asoc->stats.ictrlchunks; | |
5317 | ||
5318 | prim = asoc->peer.primary_path; | |
ee6c88bb | 5319 | memcpy(&info->sctpi_p_address, &prim->ipaddr, sizeof(prim->ipaddr)); |
52c52a61 XL |
5320 | info->sctpi_p_state = prim->state; |
5321 | info->sctpi_p_cwnd = prim->cwnd; | |
5322 | info->sctpi_p_srtt = prim->srtt; | |
5323 | info->sctpi_p_rto = jiffies_to_msecs(prim->rto); | |
5324 | info->sctpi_p_hbinterval = prim->hbinterval; | |
5325 | info->sctpi_p_pathmaxrxt = prim->pathmaxrxt; | |
5326 | info->sctpi_p_sackdelay = jiffies_to_msecs(prim->sackdelay); | |
5327 | info->sctpi_p_ssthresh = prim->ssthresh; | |
5328 | info->sctpi_p_partial_bytes_acked = prim->partial_bytes_acked; | |
5329 | info->sctpi_p_flight_size = prim->flight_size; | |
5330 | info->sctpi_p_error = prim->error_count; | |
5331 | ||
5332 | return 0; | |
5333 | } | |
5334 | EXPORT_SYMBOL_GPL(sctp_get_sctp_info); | |
5335 | ||
626d16f5 | 5336 | /* use callback to avoid exporting the core structure */ |
6c72b774 | 5337 | void sctp_transport_walk_start(struct rhashtable_iter *iter) __acquires(RCU) |
626d16f5 | 5338 | { |
7fda702f | 5339 | rhltable_walk_enter(&sctp_transport_hashtable, iter); |
626d16f5 | 5340 | |
97a6ec4a | 5341 | rhashtable_walk_start(iter); |
626d16f5 XL |
5342 | } |
5343 | ||
b77b4f63 | 5344 | void sctp_transport_walk_stop(struct rhashtable_iter *iter) __releases(RCU) |
626d16f5 XL |
5345 | { |
5346 | rhashtable_walk_stop(iter); | |
5347 | rhashtable_walk_exit(iter); | |
5348 | } | |
5349 | ||
5350 | struct sctp_transport *sctp_transport_get_next(struct net *net, | |
5351 | struct rhashtable_iter *iter) | |
5352 | { | |
5353 | struct sctp_transport *t; | |
5354 | ||
5355 | t = rhashtable_walk_next(iter); | |
5356 | for (; t; t = rhashtable_walk_next(iter)) { | |
5357 | if (IS_ERR(t)) { | |
5358 | if (PTR_ERR(t) == -EAGAIN) | |
5359 | continue; | |
5360 | break; | |
5361 | } | |
5362 | ||
bab1be79 XL |
5363 | if (!sctp_transport_hold(t)) |
5364 | continue; | |
5365 | ||
4e7696d9 | 5366 | if (net_eq(t->asoc->base.net, net) && |
626d16f5 XL |
5367 | t->asoc->peer.primary_path == t) |
5368 | break; | |
bab1be79 XL |
5369 | |
5370 | sctp_transport_put(t); | |
626d16f5 XL |
5371 | } |
5372 | ||
5373 | return t; | |
5374 | } | |
5375 | ||
5376 | struct sctp_transport *sctp_transport_get_idx(struct net *net, | |
5377 | struct rhashtable_iter *iter, | |
5378 | int pos) | |
5379 | { | |
bab1be79 | 5380 | struct sctp_transport *t; |
626d16f5 | 5381 | |
bab1be79 XL |
5382 | if (!pos) |
5383 | return SEQ_START_TOKEN; | |
626d16f5 | 5384 | |
bab1be79 XL |
5385 | while ((t = sctp_transport_get_next(net, iter)) && !IS_ERR(t)) { |
5386 | if (!--pos) | |
5387 | break; | |
5388 | sctp_transport_put(t); | |
5389 | } | |
5390 | ||
5391 | return t; | |
626d16f5 XL |
5392 | } |
5393 | ||
5394 | int sctp_for_each_endpoint(int (*cb)(struct sctp_endpoint *, void *), | |
5395 | void *p) { | |
5396 | int err = 0; | |
5397 | int hash = 0; | |
5398 | struct sctp_ep_common *epb; | |
5399 | struct sctp_hashbucket *head; | |
5400 | ||
5401 | for (head = sctp_ep_hashtable; hash < sctp_ep_hashsize; | |
5402 | hash++, head++) { | |
581409da | 5403 | read_lock_bh(&head->lock); |
626d16f5 XL |
5404 | sctp_for_each_hentry(epb, &head->chain) { |
5405 | err = cb(sctp_ep(epb), p); | |
5406 | if (err) | |
5407 | break; | |
5408 | } | |
581409da | 5409 | read_unlock_bh(&head->lock); |
626d16f5 XL |
5410 | } |
5411 | ||
5412 | return err; | |
5413 | } | |
5414 | EXPORT_SYMBOL_GPL(sctp_for_each_endpoint); | |
5415 | ||
5416 | int sctp_transport_lookup_process(int (*cb)(struct sctp_transport *, void *), | |
5417 | struct net *net, | |
5418 | const union sctp_addr *laddr, | |
5419 | const union sctp_addr *paddr, void *p) | |
5420 | { | |
5421 | struct sctp_transport *transport; | |
08abb795 | 5422 | int err; |
626d16f5 XL |
5423 | |
5424 | rcu_read_lock(); | |
5425 | transport = sctp_addrs_lookup_transport(net, laddr, paddr); | |
08abb795 | 5426 | rcu_read_unlock(); |
7fda702f | 5427 | if (!transport) |
08abb795 | 5428 | return -ENOENT; |
1cceda78 | 5429 | |
1cceda78 | 5430 | err = cb(transport, p); |
cd26da4f | 5431 | sctp_transport_put(transport); |
1cceda78 | 5432 | |
626d16f5 XL |
5433 | return err; |
5434 | } | |
5435 | EXPORT_SYMBOL_GPL(sctp_transport_lookup_process); | |
5436 | ||
5437 | int sctp_for_each_transport(int (*cb)(struct sctp_transport *, void *), | |
d25adbeb XL |
5438 | int (*cb_done)(struct sctp_transport *, void *), |
5439 | struct net *net, int *pos, void *p) { | |
626d16f5 | 5440 | struct rhashtable_iter hti; |
d25adbeb XL |
5441 | struct sctp_transport *tsp; |
5442 | int ret; | |
626d16f5 | 5443 | |
d25adbeb | 5444 | again: |
f53d77e1 | 5445 | ret = 0; |
97a6ec4a | 5446 | sctp_transport_walk_start(&hti); |
626d16f5 | 5447 | |
d25adbeb XL |
5448 | tsp = sctp_transport_get_idx(net, &hti, *pos + 1); |
5449 | for (; !IS_ERR_OR_NULL(tsp); tsp = sctp_transport_get_next(net, &hti)) { | |
d25adbeb XL |
5450 | ret = cb(tsp, p); |
5451 | if (ret) | |
626d16f5 | 5452 | break; |
d25adbeb XL |
5453 | (*pos)++; |
5454 | sctp_transport_put(tsp); | |
626d16f5 | 5455 | } |
626d16f5 | 5456 | sctp_transport_walk_stop(&hti); |
53fa1036 | 5457 | |
d25adbeb XL |
5458 | if (ret) { |
5459 | if (cb_done && !cb_done(tsp, p)) { | |
5460 | (*pos)++; | |
5461 | sctp_transport_put(tsp); | |
5462 | goto again; | |
5463 | } | |
5464 | sctp_transport_put(tsp); | |
5465 | } | |
5466 | ||
5467 | return ret; | |
626d16f5 XL |
5468 | } |
5469 | EXPORT_SYMBOL_GPL(sctp_for_each_transport); | |
5470 | ||
1da177e4 LT |
5471 | /* 7.2.1 Association Status (SCTP_STATUS) |
5472 | ||
5473 | * Applications can retrieve current status information about an | |
5474 | * association, including association state, peer receiver window size, | |
5475 | * number of unacked data chunks, and number of data chunks pending | |
5476 | * receipt. This information is read-only. | |
5477 | */ | |
5478 | static int sctp_getsockopt_sctp_status(struct sock *sk, int len, | |
5479 | char __user *optval, | |
5480 | int __user *optlen) | |
5481 | { | |
5482 | struct sctp_status status; | |
5483 | struct sctp_association *asoc = NULL; | |
5484 | struct sctp_transport *transport; | |
5485 | sctp_assoc_t associd; | |
5486 | int retval = 0; | |
5487 | ||
408f22e8 | 5488 | if (len < sizeof(status)) { |
1da177e4 LT |
5489 | retval = -EINVAL; |
5490 | goto out; | |
5491 | } | |
5492 | ||
408f22e8 NH |
5493 | len = sizeof(status); |
5494 | if (copy_from_user(&status, optval, len)) { | |
1da177e4 LT |
5495 | retval = -EFAULT; |
5496 | goto out; | |
5497 | } | |
5498 | ||
5499 | associd = status.sstat_assoc_id; | |
5500 | asoc = sctp_id2assoc(sk, associd); | |
5501 | if (!asoc) { | |
5502 | retval = -EINVAL; | |
5503 | goto out; | |
5504 | } | |
5505 | ||
5506 | transport = asoc->peer.primary_path; | |
5507 | ||
5508 | status.sstat_assoc_id = sctp_assoc2id(asoc); | |
38ab1fa9 | 5509 | status.sstat_state = sctp_assoc_to_state(asoc); |
1da177e4 LT |
5510 | status.sstat_rwnd = asoc->peer.rwnd; |
5511 | status.sstat_unackdata = asoc->unack_data; | |
5512 | ||
5513 | status.sstat_penddata = sctp_tsnmap_pending(&asoc->peer.tsn_map); | |
cee360ab XL |
5514 | status.sstat_instrms = asoc->stream.incnt; |
5515 | status.sstat_outstrms = asoc->stream.outcnt; | |
1da177e4 LT |
5516 | status.sstat_fragmentation_point = asoc->frag_point; |
5517 | status.sstat_primary.spinfo_assoc_id = sctp_assoc2id(transport->asoc); | |
8cec6b80 AV |
5518 | memcpy(&status.sstat_primary.spinfo_address, &transport->ipaddr, |
5519 | transport->af_specific->sockaddr_len); | |
1da177e4 | 5520 | /* Map ipv4 address into v4-mapped-on-v6 address. */ |
299ee123 | 5521 | sctp_get_pf_specific(sk->sk_family)->addr_to_user(sctp_sk(sk), |
1da177e4 | 5522 | (union sctp_addr *)&status.sstat_primary.spinfo_address); |
3f7a87d2 | 5523 | status.sstat_primary.spinfo_state = transport->state; |
1da177e4 LT |
5524 | status.sstat_primary.spinfo_cwnd = transport->cwnd; |
5525 | status.sstat_primary.spinfo_srtt = transport->srtt; | |
5526 | status.sstat_primary.spinfo_rto = jiffies_to_msecs(transport->rto); | |
52ccb8e9 | 5527 | status.sstat_primary.spinfo_mtu = transport->pathmtu; |
1da177e4 | 5528 | |
3f7a87d2 FF |
5529 | if (status.sstat_primary.spinfo_state == SCTP_UNKNOWN) |
5530 | status.sstat_primary.spinfo_state = SCTP_ACTIVE; | |
5531 | ||
1da177e4 LT |
5532 | if (put_user(len, optlen)) { |
5533 | retval = -EFAULT; | |
5534 | goto out; | |
5535 | } | |
5536 | ||
bb33381d DB |
5537 | pr_debug("%s: len:%d, state:%d, rwnd:%d, assoc_id:%d\n", |
5538 | __func__, len, status.sstat_state, status.sstat_rwnd, | |
5539 | status.sstat_assoc_id); | |
1da177e4 LT |
5540 | |
5541 | if (copy_to_user(optval, &status, len)) { | |
5542 | retval = -EFAULT; | |
5543 | goto out; | |
5544 | } | |
5545 | ||
5546 | out: | |
a02cec21 | 5547 | return retval; |
1da177e4 LT |
5548 | } |
5549 | ||
5550 | ||
5551 | /* 7.2.2 Peer Address Information (SCTP_GET_PEER_ADDR_INFO) | |
5552 | * | |
5553 | * Applications can retrieve information about a specific peer address | |
5554 | * of an association, including its reachability state, congestion | |
5555 | * window, and retransmission timer values. This information is | |
5556 | * read-only. | |
5557 | */ | |
5558 | static int sctp_getsockopt_peer_addr_info(struct sock *sk, int len, | |
5559 | char __user *optval, | |
5560 | int __user *optlen) | |
5561 | { | |
5562 | struct sctp_paddrinfo pinfo; | |
5563 | struct sctp_transport *transport; | |
5564 | int retval = 0; | |
5565 | ||
408f22e8 | 5566 | if (len < sizeof(pinfo)) { |
1da177e4 LT |
5567 | retval = -EINVAL; |
5568 | goto out; | |
5569 | } | |
5570 | ||
408f22e8 NH |
5571 | len = sizeof(pinfo); |
5572 | if (copy_from_user(&pinfo, optval, len)) { | |
1da177e4 LT |
5573 | retval = -EFAULT; |
5574 | goto out; | |
5575 | } | |
5576 | ||
5577 | transport = sctp_addr_id2transport(sk, &pinfo.spinfo_address, | |
5578 | pinfo.spinfo_assoc_id); | |
aef587be XL |
5579 | if (!transport) { |
5580 | retval = -EINVAL; | |
5581 | goto out; | |
5582 | } | |
5583 | ||
5584 | if (transport->state == SCTP_PF && | |
5585 | transport->asoc->pf_expose == SCTP_PF_EXPOSE_DISABLE) { | |
5586 | retval = -EACCES; | |
5587 | goto out; | |
5588 | } | |
1da177e4 LT |
5589 | |
5590 | pinfo.spinfo_assoc_id = sctp_assoc2id(transport->asoc); | |
3f7a87d2 | 5591 | pinfo.spinfo_state = transport->state; |
1da177e4 LT |
5592 | pinfo.spinfo_cwnd = transport->cwnd; |
5593 | pinfo.spinfo_srtt = transport->srtt; | |
5594 | pinfo.spinfo_rto = jiffies_to_msecs(transport->rto); | |
52ccb8e9 | 5595 | pinfo.spinfo_mtu = transport->pathmtu; |
1da177e4 | 5596 | |
3f7a87d2 FF |
5597 | if (pinfo.spinfo_state == SCTP_UNKNOWN) |
5598 | pinfo.spinfo_state = SCTP_ACTIVE; | |
5599 | ||
1da177e4 LT |
5600 | if (put_user(len, optlen)) { |
5601 | retval = -EFAULT; | |
5602 | goto out; | |
5603 | } | |
5604 | ||
5605 | if (copy_to_user(optval, &pinfo, len)) { | |
5606 | retval = -EFAULT; | |
5607 | goto out; | |
5608 | } | |
5609 | ||
5610 | out: | |
a02cec21 | 5611 | return retval; |
1da177e4 LT |
5612 | } |
5613 | ||
5614 | /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS) | |
5615 | * | |
5616 | * This option is a on/off flag. If enabled no SCTP message | |
5617 | * fragmentation will be performed. Instead if a message being sent | |
5618 | * exceeds the current PMTU size, the message will NOT be sent and | |
5619 | * instead a error will be indicated to the user. | |
5620 | */ | |
5621 | static int sctp_getsockopt_disable_fragments(struct sock *sk, int len, | |
5622 | char __user *optval, int __user *optlen) | |
5623 | { | |
5624 | int val; | |
5625 | ||
5626 | if (len < sizeof(int)) | |
5627 | return -EINVAL; | |
5628 | ||
5629 | len = sizeof(int); | |
5630 | val = (sctp_sk(sk)->disable_fragments == 1); | |
5631 | if (put_user(len, optlen)) | |
5632 | return -EFAULT; | |
5633 | if (copy_to_user(optval, &val, len)) | |
5634 | return -EFAULT; | |
5635 | return 0; | |
5636 | } | |
5637 | ||
5638 | /* 7.1.15 Set notification and ancillary events (SCTP_EVENTS) | |
5639 | * | |
5640 | * This socket option is used to specify various notifications and | |
5641 | * ancillary data the user wishes to receive. | |
5642 | */ | |
5643 | static int sctp_getsockopt_events(struct sock *sk, int len, char __user *optval, | |
5644 | int __user *optlen) | |
5645 | { | |
2cc0eeb6 XL |
5646 | struct sctp_event_subscribe subscribe; |
5647 | __u8 *sn_type = (__u8 *)&subscribe; | |
5648 | int i; | |
5649 | ||
a4b8e71b | 5650 | if (len == 0) |
1da177e4 | 5651 | return -EINVAL; |
acdd5985 TG |
5652 | if (len > sizeof(struct sctp_event_subscribe)) |
5653 | len = sizeof(struct sctp_event_subscribe); | |
408f22e8 NH |
5654 | if (put_user(len, optlen)) |
5655 | return -EFAULT; | |
2cc0eeb6 XL |
5656 | |
5657 | for (i = 0; i < len; i++) | |
5658 | sn_type[i] = sctp_ulpevent_type_enabled(sctp_sk(sk)->subscribe, | |
5659 | SCTP_SN_TYPE_BASE + i); | |
5660 | ||
5661 | if (copy_to_user(optval, &subscribe, len)) | |
1da177e4 | 5662 | return -EFAULT; |
2cc0eeb6 | 5663 | |
1da177e4 LT |
5664 | return 0; |
5665 | } | |
5666 | ||
5667 | /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE) | |
5668 | * | |
5669 | * This socket option is applicable to the UDP-style socket only. When | |
5670 | * set it will cause associations that are idle for more than the | |
5671 | * specified number of seconds to automatically close. An association | |
5672 | * being idle is defined an association that has NOT sent or received | |
5673 | * user data. The special value of '0' indicates that no automatic | |
5674 | * close of any associations should be performed. The option expects an | |
5675 | * integer defining the number of seconds of idle time before an | |
5676 | * association is closed. | |
5677 | */ | |
5678 | static int sctp_getsockopt_autoclose(struct sock *sk, int len, char __user *optval, int __user *optlen) | |
5679 | { | |
5680 | /* Applicable to UDP-style socket only */ | |
5681 | if (sctp_style(sk, TCP)) | |
5682 | return -EOPNOTSUPP; | |
408f22e8 | 5683 | if (len < sizeof(int)) |
1da177e4 | 5684 | return -EINVAL; |
408f22e8 NH |
5685 | len = sizeof(int); |
5686 | if (put_user(len, optlen)) | |
5687 | return -EFAULT; | |
b2ce04c2 | 5688 | if (put_user(sctp_sk(sk)->autoclose, (int __user *)optval)) |
1da177e4 LT |
5689 | return -EFAULT; |
5690 | return 0; | |
5691 | } | |
5692 | ||
5693 | /* Helper routine to branch off an association to a new socket. */ | |
0343c554 | 5694 | int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp) |
1da177e4 | 5695 | { |
0343c554 | 5696 | struct sctp_association *asoc = sctp_id2assoc(sk, id); |
299ee123 | 5697 | struct sctp_sock *sp = sctp_sk(sk); |
1da177e4 LT |
5698 | struct socket *sock; |
5699 | int err = 0; | |
5700 | ||
df80cd9b XL |
5701 | /* Do not peel off from one netns to another one. */ |
5702 | if (!net_eq(current->nsproxy->net_ns, sock_net(sk))) | |
5703 | return -EINVAL; | |
5704 | ||
0343c554 BP |
5705 | if (!asoc) |
5706 | return -EINVAL; | |
5707 | ||
1da177e4 LT |
5708 | /* An association cannot be branched off from an already peeled-off |
5709 | * socket, nor is this supported for tcp style sockets. | |
5710 | */ | |
5711 | if (!sctp_style(sk, UDP)) | |
5712 | return -EINVAL; | |
5713 | ||
5714 | /* Create a new socket. */ | |
5715 | err = sock_create(sk->sk_family, SOCK_SEQPACKET, IPPROTO_SCTP, &sock); | |
5716 | if (err < 0) | |
5717 | return err; | |
5718 | ||
914e1c8b | 5719 | sctp_copy_sock(sock->sk, sk, asoc); |
4f444308 VY |
5720 | |
5721 | /* Make peeled-off sockets more like 1-1 accepted sockets. | |
b7e10c25 RH |
5722 | * Set the daddr and initialize id to something more random and also |
5723 | * copy over any ip options. | |
4f444308 | 5724 | */ |
299ee123 | 5725 | sp->pf->to_sk_daddr(&asoc->peer.primary_addr, sk); |
b7e10c25 | 5726 | sp->pf->copy_ip_options(sk, sock->sk); |
914e1c8b VY |
5727 | |
5728 | /* Populate the fields of the newsk from the oldsk and migrate the | |
5729 | * asoc to the newsk. | |
5730 | */ | |
89664c62 XL |
5731 | err = sctp_sock_migrate(sk, sock->sk, asoc, |
5732 | SCTP_SOCKET_UDP_HIGH_BANDWIDTH); | |
5733 | if (err) { | |
5734 | sock_release(sock); | |
5735 | sock = NULL; | |
5736 | } | |
4f444308 | 5737 | |
1da177e4 LT |
5738 | *sockp = sock; |
5739 | ||
5740 | return err; | |
5741 | } | |
0343c554 | 5742 | EXPORT_SYMBOL(sctp_do_peeloff); |
1da177e4 | 5743 | |
2cb5c8e3 NH |
5744 | static int sctp_getsockopt_peeloff_common(struct sock *sk, sctp_peeloff_arg_t *peeloff, |
5745 | struct file **newfile, unsigned flags) | |
5746 | { | |
5747 | struct socket *newsock; | |
5748 | int retval; | |
5749 | ||
5750 | retval = sctp_do_peeloff(sk, peeloff->associd, &newsock); | |
5751 | if (retval < 0) | |
5752 | goto out; | |
5753 | ||
5754 | /* Map the socket to an unused fd that can be returned to the user. */ | |
5755 | retval = get_unused_fd_flags(flags & SOCK_CLOEXEC); | |
5756 | if (retval < 0) { | |
5757 | sock_release(newsock); | |
5758 | goto out; | |
5759 | } | |
5760 | ||
5761 | *newfile = sock_alloc_file(newsock, 0, NULL); | |
5762 | if (IS_ERR(*newfile)) { | |
5763 | put_unused_fd(retval); | |
2cb5c8e3 NH |
5764 | retval = PTR_ERR(*newfile); |
5765 | *newfile = NULL; | |
5766 | return retval; | |
5767 | } | |
5768 | ||
5769 | pr_debug("%s: sk:%p, newsk:%p, sd:%d\n", __func__, sk, newsock->sk, | |
5770 | retval); | |
5771 | ||
5772 | peeloff->sd = retval; | |
5773 | ||
5774 | if (flags & SOCK_NONBLOCK) | |
5775 | (*newfile)->f_flags |= O_NONBLOCK; | |
5776 | out: | |
5777 | return retval; | |
5778 | } | |
5779 | ||
1da177e4 LT |
5780 | static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval, int __user *optlen) |
5781 | { | |
5782 | sctp_peeloff_arg_t peeloff; | |
2cb5c8e3 | 5783 | struct file *newfile = NULL; |
1da177e4 | 5784 | int retval = 0; |
1da177e4 | 5785 | |
408f22e8 | 5786 | if (len < sizeof(sctp_peeloff_arg_t)) |
1da177e4 | 5787 | return -EINVAL; |
408f22e8 | 5788 | len = sizeof(sctp_peeloff_arg_t); |
1da177e4 LT |
5789 | if (copy_from_user(&peeloff, optval, len)) |
5790 | return -EFAULT; | |
5791 | ||
2cb5c8e3 | 5792 | retval = sctp_getsockopt_peeloff_common(sk, &peeloff, &newfile, 0); |
1da177e4 LT |
5793 | if (retval < 0) |
5794 | goto out; | |
5795 | ||
2cb5c8e3 NH |
5796 | /* Return the fd mapped to the new socket. */ |
5797 | if (put_user(len, optlen)) { | |
5798 | fput(newfile); | |
5799 | put_unused_fd(retval); | |
5800 | return -EFAULT; | |
1da177e4 LT |
5801 | } |
5802 | ||
2cb5c8e3 NH |
5803 | if (copy_to_user(optval, &peeloff, len)) { |
5804 | fput(newfile); | |
56b31d1c | 5805 | put_unused_fd(retval); |
2cb5c8e3 | 5806 | return -EFAULT; |
56b31d1c | 5807 | } |
2cb5c8e3 NH |
5808 | fd_install(retval, newfile); |
5809 | out: | |
5810 | return retval; | |
5811 | } | |
56b31d1c | 5812 | |
2cb5c8e3 NH |
5813 | static int sctp_getsockopt_peeloff_flags(struct sock *sk, int len, |
5814 | char __user *optval, int __user *optlen) | |
5815 | { | |
5816 | sctp_peeloff_flags_arg_t peeloff; | |
5817 | struct file *newfile = NULL; | |
5818 | int retval = 0; | |
5819 | ||
5820 | if (len < sizeof(sctp_peeloff_flags_arg_t)) | |
5821 | return -EINVAL; | |
5822 | len = sizeof(sctp_peeloff_flags_arg_t); | |
5823 | if (copy_from_user(&peeloff, optval, len)) | |
5824 | return -EFAULT; | |
5825 | ||
5826 | retval = sctp_getsockopt_peeloff_common(sk, &peeloff.p_arg, | |
5827 | &newfile, peeloff.flags); | |
5828 | if (retval < 0) | |
5829 | goto out; | |
1da177e4 LT |
5830 | |
5831 | /* Return the fd mapped to the new socket. */ | |
56b31d1c AV |
5832 | if (put_user(len, optlen)) { |
5833 | fput(newfile); | |
5834 | put_unused_fd(retval); | |
5835 | return -EFAULT; | |
5836 | } | |
2cb5c8e3 | 5837 | |
56b31d1c AV |
5838 | if (copy_to_user(optval, &peeloff, len)) { |
5839 | fput(newfile); | |
5840 | put_unused_fd(retval); | |
408f22e8 | 5841 | return -EFAULT; |
56b31d1c AV |
5842 | } |
5843 | fd_install(retval, newfile); | |
1da177e4 LT |
5844 | out: |
5845 | return retval; | |
5846 | } | |
5847 | ||
5848 | /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS) | |
5849 | * | |
5850 | * Applications can enable or disable heartbeats for any peer address of | |
5851 | * an association, modify an address's heartbeat interval, force a | |
5852 | * heartbeat to be sent immediately, and adjust the address's maximum | |
5853 | * number of retransmissions sent before an address is considered | |
5854 | * unreachable. The following structure is used to access and modify an | |
5855 | * address's parameters: | |
5856 | * | |
5857 | * struct sctp_paddrparams { | |
52ccb8e9 FF |
5858 | * sctp_assoc_t spp_assoc_id; |
5859 | * struct sockaddr_storage spp_address; | |
5860 | * uint32_t spp_hbinterval; | |
5861 | * uint16_t spp_pathmaxrxt; | |
5862 | * uint32_t spp_pathmtu; | |
5863 | * uint32_t spp_sackdelay; | |
5864 | * uint32_t spp_flags; | |
5865 | * }; | |
5866 | * | |
5867 | * spp_assoc_id - (one-to-many style socket) This is filled in the | |
5868 | * application, and identifies the association for | |
5869 | * this query. | |
1da177e4 LT |
5870 | * spp_address - This specifies which address is of interest. |
5871 | * spp_hbinterval - This contains the value of the heartbeat interval, | |
52ccb8e9 FF |
5872 | * in milliseconds. If a value of zero |
5873 | * is present in this field then no changes are to | |
5874 | * be made to this parameter. | |
1da177e4 LT |
5875 | * spp_pathmaxrxt - This contains the maximum number of |
5876 | * retransmissions before this address shall be | |
52ccb8e9 FF |
5877 | * considered unreachable. If a value of zero |
5878 | * is present in this field then no changes are to | |
5879 | * be made to this parameter. | |
5880 | * spp_pathmtu - When Path MTU discovery is disabled the value | |
5881 | * specified here will be the "fixed" path mtu. | |
5882 | * Note that if the spp_address field is empty | |
5883 | * then all associations on this address will | |
5884 | * have this fixed path mtu set upon them. | |
5885 | * | |
5886 | * spp_sackdelay - When delayed sack is enabled, this value specifies | |
5887 | * the number of milliseconds that sacks will be delayed | |
5888 | * for. This value will apply to all addresses of an | |
5889 | * association if the spp_address field is empty. Note | |
5890 | * also, that if delayed sack is enabled and this | |
5891 | * value is set to 0, no change is made to the last | |
5892 | * recorded delayed sack timer value. | |
5893 | * | |
5894 | * spp_flags - These flags are used to control various features | |
5895 | * on an association. The flag field may contain | |
5896 | * zero or more of the following options. | |
5897 | * | |
5898 | * SPP_HB_ENABLE - Enable heartbeats on the | |
5899 | * specified address. Note that if the address | |
5900 | * field is empty all addresses for the association | |
5901 | * have heartbeats enabled upon them. | |
5902 | * | |
5903 | * SPP_HB_DISABLE - Disable heartbeats on the | |
5904 | * speicifed address. Note that if the address | |
5905 | * field is empty all addresses for the association | |
5906 | * will have their heartbeats disabled. Note also | |
5907 | * that SPP_HB_ENABLE and SPP_HB_DISABLE are | |
5908 | * mutually exclusive, only one of these two should | |
5909 | * be specified. Enabling both fields will have | |
5910 | * undetermined results. | |
5911 | * | |
5912 | * SPP_HB_DEMAND - Request a user initiated heartbeat | |
5913 | * to be made immediately. | |
5914 | * | |
5915 | * SPP_PMTUD_ENABLE - This field will enable PMTU | |
5916 | * discovery upon the specified address. Note that | |
5917 | * if the address feild is empty then all addresses | |
5918 | * on the association are effected. | |
5919 | * | |
5920 | * SPP_PMTUD_DISABLE - This field will disable PMTU | |
5921 | * discovery upon the specified address. Note that | |
5922 | * if the address feild is empty then all addresses | |
5923 | * on the association are effected. Not also that | |
5924 | * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually | |
5925 | * exclusive. Enabling both will have undetermined | |
5926 | * results. | |
5927 | * | |
5928 | * SPP_SACKDELAY_ENABLE - Setting this flag turns | |
5929 | * on delayed sack. The time specified in spp_sackdelay | |
5930 | * is used to specify the sack delay for this address. Note | |
5931 | * that if spp_address is empty then all addresses will | |
5932 | * enable delayed sack and take on the sack delay | |
5933 | * value specified in spp_sackdelay. | |
5934 | * SPP_SACKDELAY_DISABLE - Setting this flag turns | |
5935 | * off delayed sack. If the spp_address field is blank then | |
5936 | * delayed sack is disabled for the entire association. Note | |
5937 | * also that this field is mutually exclusive to | |
5938 | * SPP_SACKDELAY_ENABLE, setting both will have undefined | |
5939 | * results. | |
0b0dce7a XL |
5940 | * |
5941 | * SPP_IPV6_FLOWLABEL: Setting this flag enables the | |
5942 | * setting of the IPV6 flow label value. The value is | |
5943 | * contained in the spp_ipv6_flowlabel field. | |
5944 | * Upon retrieval, this flag will be set to indicate that | |
5945 | * the spp_ipv6_flowlabel field has a valid value returned. | |
5946 | * If a specific destination address is set (in the | |
5947 | * spp_address field), then the value returned is that of | |
5948 | * the address. If just an association is specified (and | |
5949 | * no address), then the association's default flow label | |
5950 | * is returned. If neither an association nor a destination | |
5951 | * is specified, then the socket's default flow label is | |
5952 | * returned. For non-IPv6 sockets, this flag will be left | |
5953 | * cleared. | |
5954 | * | |
5955 | * SPP_DSCP: Setting this flag enables the setting of the | |
5956 | * Differentiated Services Code Point (DSCP) value | |
5957 | * associated with either the association or a specific | |
5958 | * address. The value is obtained in the spp_dscp field. | |
5959 | * Upon retrieval, this flag will be set to indicate that | |
5960 | * the spp_dscp field has a valid value returned. If a | |
5961 | * specific destination address is set when called (in the | |
5962 | * spp_address field), then that specific destination | |
5963 | * address's DSCP value is returned. If just an association | |
5964 | * is specified, then the association's default DSCP is | |
5965 | * returned. If neither an association nor a destination is | |
5966 | * specified, then the socket's default DSCP is returned. | |
5967 | * | |
5968 | * spp_ipv6_flowlabel | |
5969 | * - This field is used in conjunction with the | |
5970 | * SPP_IPV6_FLOWLABEL flag and contains the IPv6 flow label. | |
5971 | * The 20 least significant bits are used for the flow | |
5972 | * label. This setting has precedence over any IPv6-layer | |
5973 | * setting. | |
5974 | * | |
5975 | * spp_dscp - This field is used in conjunction with the SPP_DSCP flag | |
5976 | * and contains the DSCP. The 6 most significant bits are | |
5977 | * used for the DSCP. This setting has precedence over any | |
5978 | * IPv4- or IPv6- layer setting. | |
1da177e4 LT |
5979 | */ |
5980 | static int sctp_getsockopt_peer_addr_params(struct sock *sk, int len, | |
52ccb8e9 | 5981 | char __user *optval, int __user *optlen) |
1da177e4 | 5982 | { |
52ccb8e9 FF |
5983 | struct sctp_paddrparams params; |
5984 | struct sctp_transport *trans = NULL; | |
5985 | struct sctp_association *asoc = NULL; | |
5986 | struct sctp_sock *sp = sctp_sk(sk); | |
1da177e4 | 5987 | |
0b0dce7a XL |
5988 | if (len >= sizeof(params)) |
5989 | len = sizeof(params); | |
5990 | else if (len >= ALIGN(offsetof(struct sctp_paddrparams, | |
5991 | spp_ipv6_flowlabel), 4)) | |
5992 | len = ALIGN(offsetof(struct sctp_paddrparams, | |
5993 | spp_ipv6_flowlabel), 4); | |
5994 | else | |
1da177e4 | 5995 | return -EINVAL; |
0b0dce7a | 5996 | |
1da177e4 LT |
5997 | if (copy_from_user(¶ms, optval, len)) |
5998 | return -EFAULT; | |
5999 | ||
52ccb8e9 FF |
6000 | /* If an address other than INADDR_ANY is specified, and |
6001 | * no transport is found, then the request is invalid. | |
1da177e4 | 6002 | */ |
cb3f837b | 6003 | if (!sctp_is_any(sk, (union sctp_addr *)¶ms.spp_address)) { |
52ccb8e9 FF |
6004 | trans = sctp_addr_id2transport(sk, ¶ms.spp_address, |
6005 | params.spp_assoc_id); | |
6006 | if (!trans) { | |
bb33381d | 6007 | pr_debug("%s: failed no transport\n", __func__); |
52ccb8e9 FF |
6008 | return -EINVAL; |
6009 | } | |
1da177e4 LT |
6010 | } |
6011 | ||
b99e5e02 XL |
6012 | /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the |
6013 | * socket is a one to many style socket, and an association | |
6014 | * was not found, then the id was invalid. | |
52ccb8e9 FF |
6015 | */ |
6016 | asoc = sctp_id2assoc(sk, params.spp_assoc_id); | |
b99e5e02 XL |
6017 | if (!asoc && params.spp_assoc_id != SCTP_FUTURE_ASSOC && |
6018 | sctp_style(sk, UDP)) { | |
bb33381d | 6019 | pr_debug("%s: failed no association\n", __func__); |
1da177e4 | 6020 | return -EINVAL; |
52ccb8e9 | 6021 | } |
1da177e4 | 6022 | |
52ccb8e9 FF |
6023 | if (trans) { |
6024 | /* Fetch transport values. */ | |
6025 | params.spp_hbinterval = jiffies_to_msecs(trans->hbinterval); | |
6026 | params.spp_pathmtu = trans->pathmtu; | |
6027 | params.spp_pathmaxrxt = trans->pathmaxrxt; | |
6028 | params.spp_sackdelay = jiffies_to_msecs(trans->sackdelay); | |
6029 | ||
6030 | /*draft-11 doesn't say what to return in spp_flags*/ | |
6031 | params.spp_flags = trans->param_flags; | |
0b0dce7a XL |
6032 | if (trans->flowlabel & SCTP_FLOWLABEL_SET_MASK) { |
6033 | params.spp_ipv6_flowlabel = trans->flowlabel & | |
6034 | SCTP_FLOWLABEL_VAL_MASK; | |
6035 | params.spp_flags |= SPP_IPV6_FLOWLABEL; | |
6036 | } | |
6037 | if (trans->dscp & SCTP_DSCP_SET_MASK) { | |
6038 | params.spp_dscp = trans->dscp & SCTP_DSCP_VAL_MASK; | |
6039 | params.spp_flags |= SPP_DSCP; | |
6040 | } | |
52ccb8e9 FF |
6041 | } else if (asoc) { |
6042 | /* Fetch association values. */ | |
6043 | params.spp_hbinterval = jiffies_to_msecs(asoc->hbinterval); | |
6044 | params.spp_pathmtu = asoc->pathmtu; | |
6045 | params.spp_pathmaxrxt = asoc->pathmaxrxt; | |
6046 | params.spp_sackdelay = jiffies_to_msecs(asoc->sackdelay); | |
6047 | ||
6048 | /*draft-11 doesn't say what to return in spp_flags*/ | |
6049 | params.spp_flags = asoc->param_flags; | |
0b0dce7a XL |
6050 | if (asoc->flowlabel & SCTP_FLOWLABEL_SET_MASK) { |
6051 | params.spp_ipv6_flowlabel = asoc->flowlabel & | |
6052 | SCTP_FLOWLABEL_VAL_MASK; | |
6053 | params.spp_flags |= SPP_IPV6_FLOWLABEL; | |
6054 | } | |
6055 | if (asoc->dscp & SCTP_DSCP_SET_MASK) { | |
6056 | params.spp_dscp = asoc->dscp & SCTP_DSCP_VAL_MASK; | |
6057 | params.spp_flags |= SPP_DSCP; | |
6058 | } | |
52ccb8e9 FF |
6059 | } else { |
6060 | /* Fetch socket values. */ | |
6061 | params.spp_hbinterval = sp->hbinterval; | |
6062 | params.spp_pathmtu = sp->pathmtu; | |
6063 | params.spp_sackdelay = sp->sackdelay; | |
6064 | params.spp_pathmaxrxt = sp->pathmaxrxt; | |
1da177e4 | 6065 | |
52ccb8e9 FF |
6066 | /*draft-11 doesn't say what to return in spp_flags*/ |
6067 | params.spp_flags = sp->param_flags; | |
0b0dce7a XL |
6068 | if (sp->flowlabel & SCTP_FLOWLABEL_SET_MASK) { |
6069 | params.spp_ipv6_flowlabel = sp->flowlabel & | |
6070 | SCTP_FLOWLABEL_VAL_MASK; | |
6071 | params.spp_flags |= SPP_IPV6_FLOWLABEL; | |
6072 | } | |
6073 | if (sp->dscp & SCTP_DSCP_SET_MASK) { | |
6074 | params.spp_dscp = sp->dscp & SCTP_DSCP_VAL_MASK; | |
6075 | params.spp_flags |= SPP_DSCP; | |
6076 | } | |
52ccb8e9 | 6077 | } |
1da177e4 | 6078 | |
1da177e4 LT |
6079 | if (copy_to_user(optval, ¶ms, len)) |
6080 | return -EFAULT; | |
6081 | ||
6082 | if (put_user(len, optlen)) | |
6083 | return -EFAULT; | |
6084 | ||
6085 | return 0; | |
6086 | } | |
6087 | ||
d364d927 WY |
6088 | /* |
6089 | * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK) | |
6090 | * | |
6091 | * This option will effect the way delayed acks are performed. This | |
6092 | * option allows you to get or set the delayed ack time, in | |
6093 | * milliseconds. It also allows changing the delayed ack frequency. | |
6094 | * Changing the frequency to 1 disables the delayed sack algorithm. If | |
6095 | * the assoc_id is 0, then this sets or gets the endpoints default | |
6096 | * values. If the assoc_id field is non-zero, then the set or get | |
6097 | * effects the specified association for the one to many model (the | |
6098 | * assoc_id field is ignored by the one to one model). Note that if | |
6099 | * sack_delay or sack_freq are 0 when setting this option, then the | |
6100 | * current values will remain unchanged. | |
6101 | * | |
6102 | * struct sctp_sack_info { | |
6103 | * sctp_assoc_t sack_assoc_id; | |
6104 | * uint32_t sack_delay; | |
6105 | * uint32_t sack_freq; | |
6106 | * }; | |
7708610b | 6107 | * |
d364d927 WY |
6108 | * sack_assoc_id - This parameter, indicates which association the user |
6109 | * is performing an action upon. Note that if this field's value is | |
6110 | * zero then the endpoints default value is changed (effecting future | |
6111 | * associations only). | |
7708610b | 6112 | * |
d364d927 WY |
6113 | * sack_delay - This parameter contains the number of milliseconds that |
6114 | * the user is requesting the delayed ACK timer be set to. Note that | |
6115 | * this value is defined in the standard to be between 200 and 500 | |
6116 | * milliseconds. | |
7708610b | 6117 | * |
d364d927 WY |
6118 | * sack_freq - This parameter contains the number of packets that must |
6119 | * be received before a sack is sent without waiting for the delay | |
6120 | * timer to expire. The default value for this is 2, setting this | |
6121 | * value to 1 will disable the delayed sack algorithm. | |
7708610b | 6122 | */ |
d364d927 | 6123 | static int sctp_getsockopt_delayed_ack(struct sock *sk, int len, |
7708610b FF |
6124 | char __user *optval, |
6125 | int __user *optlen) | |
6126 | { | |
d364d927 | 6127 | struct sctp_sack_info params; |
7708610b FF |
6128 | struct sctp_association *asoc = NULL; |
6129 | struct sctp_sock *sp = sctp_sk(sk); | |
6130 | ||
d364d927 WY |
6131 | if (len >= sizeof(struct sctp_sack_info)) { |
6132 | len = sizeof(struct sctp_sack_info); | |
7708610b | 6133 | |
d364d927 WY |
6134 | if (copy_from_user(¶ms, optval, len)) |
6135 | return -EFAULT; | |
6136 | } else if (len == sizeof(struct sctp_assoc_value)) { | |
94f65193 | 6137 | pr_warn_ratelimited(DEPRECATED |
f916ec96 | 6138 | "%s (pid %d) " |
94f65193 | 6139 | "Use of struct sctp_assoc_value in delayed_ack socket option.\n" |
f916ec96 NH |
6140 | "Use struct sctp_sack_info instead\n", |
6141 | current->comm, task_pid_nr(current)); | |
d364d927 WY |
6142 | if (copy_from_user(¶ms, optval, len)) |
6143 | return -EFAULT; | |
6144 | } else | |
cb3f837b | 6145 | return -EINVAL; |
7708610b | 6146 | |
9c5829e1 XL |
6147 | /* Get association, if sack_assoc_id != SCTP_FUTURE_ASSOC and the |
6148 | * socket is a one to many style socket, and an association | |
6149 | * was not found, then the id was invalid. | |
d808ad9a | 6150 | */ |
d364d927 | 6151 | asoc = sctp_id2assoc(sk, params.sack_assoc_id); |
9c5829e1 XL |
6152 | if (!asoc && params.sack_assoc_id != SCTP_FUTURE_ASSOC && |
6153 | sctp_style(sk, UDP)) | |
7708610b FF |
6154 | return -EINVAL; |
6155 | ||
6156 | if (asoc) { | |
6157 | /* Fetch association values. */ | |
d364d927 | 6158 | if (asoc->param_flags & SPP_SACKDELAY_ENABLE) { |
9c5829e1 | 6159 | params.sack_delay = jiffies_to_msecs(asoc->sackdelay); |
d364d927 WY |
6160 | params.sack_freq = asoc->sackfreq; |
6161 | ||
6162 | } else { | |
6163 | params.sack_delay = 0; | |
6164 | params.sack_freq = 1; | |
6165 | } | |
7708610b FF |
6166 | } else { |
6167 | /* Fetch socket values. */ | |
d364d927 WY |
6168 | if (sp->param_flags & SPP_SACKDELAY_ENABLE) { |
6169 | params.sack_delay = sp->sackdelay; | |
6170 | params.sack_freq = sp->sackfreq; | |
6171 | } else { | |
6172 | params.sack_delay = 0; | |
6173 | params.sack_freq = 1; | |
6174 | } | |
7708610b FF |
6175 | } |
6176 | ||
6177 | if (copy_to_user(optval, ¶ms, len)) | |
6178 | return -EFAULT; | |
6179 | ||
6180 | if (put_user(len, optlen)) | |
6181 | return -EFAULT; | |
6182 | ||
6183 | return 0; | |
6184 | } | |
6185 | ||
1da177e4 LT |
6186 | /* 7.1.3 Initialization Parameters (SCTP_INITMSG) |
6187 | * | |
6188 | * Applications can specify protocol parameters for the default association | |
6189 | * initialization. The option name argument to setsockopt() and getsockopt() | |
6190 | * is SCTP_INITMSG. | |
6191 | * | |
6192 | * Setting initialization parameters is effective only on an unconnected | |
6193 | * socket (for UDP-style sockets only future associations are effected | |
6194 | * by the change). With TCP-style sockets, this option is inherited by | |
6195 | * sockets derived from a listener socket. | |
6196 | */ | |
6197 | static int sctp_getsockopt_initmsg(struct sock *sk, int len, char __user *optval, int __user *optlen) | |
6198 | { | |
408f22e8 | 6199 | if (len < sizeof(struct sctp_initmsg)) |
1da177e4 | 6200 | return -EINVAL; |
408f22e8 NH |
6201 | len = sizeof(struct sctp_initmsg); |
6202 | if (put_user(len, optlen)) | |
6203 | return -EFAULT; | |
1da177e4 LT |
6204 | if (copy_to_user(optval, &sctp_sk(sk)->initmsg, len)) |
6205 | return -EFAULT; | |
6206 | return 0; | |
6207 | } | |
6208 | ||