]>
Commit | Line | Data |
---|---|---|
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> |
40e0b090 | 62 | #include <trace/events/sock.h> |
1da177e4 LT |
63 | |
64 | #include <linux/socket.h> /* for sa_family_t */ | |
bc3b2d7f | 65 | #include <linux/export.h> |
1da177e4 LT |
66 | #include <net/sock.h> |
67 | #include <net/sctp/sctp.h> | |
68 | #include <net/sctp/sm.h> | |
13aa8770 | 69 | #include <net/sctp/stream_sched.h> |
490a79fa | 70 | #include <net/rps.h> |
1da177e4 | 71 | |
1da177e4 | 72 | /* Forward declarations for internal helper functions. */ |
dc9511dd | 73 | static bool sctp_writeable(const struct sock *sk); |
1da177e4 | 74 | static void sctp_wfree(struct sk_buff *skb); |
cea0cc80 | 75 | static int sctp_wait_for_sndbuf(struct sctp_association *asoc, long *timeo_p, |
a0ff6600 | 76 | size_t msg_len); |
26ac8e5f | 77 | static int sctp_wait_for_packet(struct sock *sk, int *err, long *timeo_p); |
1da177e4 LT |
78 | static int sctp_wait_for_connect(struct sctp_association *, long *timeo_p); |
79 | static int sctp_wait_for_accept(struct sock *sk, long timeo); | |
80 | static void sctp_wait_for_close(struct sock *sk, long timeo); | |
0a2fbac1 | 81 | static void sctp_destruct_sock(struct sock *sk); |
1da177e4 LT |
82 | static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt, |
83 | union sctp_addr *addr, int len); | |
84 | static int sctp_bindx_add(struct sock *, struct sockaddr *, int); | |
85 | static int sctp_bindx_rem(struct sock *, struct sockaddr *, int); | |
86 | static int sctp_send_asconf_add_ip(struct sock *, struct sockaddr *, int); | |
87 | static int sctp_send_asconf_del_ip(struct sock *, struct sockaddr *, int); | |
88 | static int sctp_send_asconf(struct sctp_association *asoc, | |
89 | struct sctp_chunk *chunk); | |
90 | static int sctp_do_bind(struct sock *, union sctp_addr *, int); | |
91 | static int sctp_autobind(struct sock *sk); | |
89664c62 XL |
92 | static int sctp_sock_migrate(struct sock *oldsk, struct sock *newsk, |
93 | struct sctp_association *assoc, | |
94 | enum sctp_socket_type type); | |
1da177e4 | 95 | |
06044751 | 96 | static unsigned long sctp_memory_pressure; |
8d987e5c | 97 | static atomic_long_t sctp_memory_allocated; |
0defbb0a | 98 | static DEFINE_PER_CPU(int, sctp_memory_per_cpu_fw_alloc); |
1748376b | 99 | struct percpu_counter sctp_sockets_allocated; |
4d93df0a | 100 | |
5c52ba17 | 101 | static void sctp_enter_memory_pressure(struct sock *sk) |
4d93df0a | 102 | { |
76f33296 | 103 | WRITE_ONCE(sctp_memory_pressure, 1); |
4d93df0a NH |
104 | } |
105 | ||
106 | ||
1da177e4 LT |
107 | /* Get the sndbuf space available at the time on the association. */ |
108 | static inline int sctp_wspace(struct sctp_association *asoc) | |
109 | { | |
cd305c74 | 110 | struct sock *sk = asoc->base.sk; |
1da177e4 | 111 | |
cd305c74 XL |
112 | return asoc->ep->sndbuf_policy ? sk->sk_sndbuf - asoc->sndbuf_used |
113 | : sk_stream_wspace(sk); | |
1da177e4 LT |
114 | } |
115 | ||
116 | /* Increment the used sndbuf space count of the corresponding association by | |
117 | * the size of the outgoing data chunk. | |
118 | * Also, set the skb destructor for sndbuf accounting later. | |
119 | * | |
120 | * Since it is always 1-1 between chunk and skb, and also a new skb is always | |
121 | * allocated for chunk bundling in sctp_packet_transmit(), we can use the | |
122 | * destructor in the data chunk skb for the purpose of the sndbuf space | |
123 | * tracking. | |
124 | */ | |
125 | static inline void sctp_set_owner_w(struct sctp_chunk *chunk) | |
126 | { | |
127 | struct sctp_association *asoc = chunk->asoc; | |
128 | struct sock *sk = asoc->base.sk; | |
129 | ||
130 | /* The sndbuf space is tracked per association. */ | |
131 | sctp_association_hold(asoc); | |
132 | ||
1b1e0bc9 XL |
133 | if (chunk->shkey) |
134 | sctp_auth_shkey_hold(chunk->shkey); | |
135 | ||
4eb701df NH |
136 | skb_set_owner_w(chunk->skb, sk); |
137 | ||
1da177e4 LT |
138 | chunk->skb->destructor = sctp_wfree; |
139 | /* Save the chunk pointer in skb for sctp_wfree to use later. */ | |
f869c912 | 140 | skb_shinfo(chunk->skb)->destructor_arg = chunk; |
1da177e4 | 141 | |
14afee4b | 142 | refcount_add(sizeof(struct sctp_chunk), &sk->sk_wmem_alloc); |
605c0ac1 | 143 | asoc->sndbuf_used += chunk->skb->truesize + sizeof(struct sctp_chunk); |
dc9511dd | 144 | sk_wmem_queued_add(sk, chunk->skb->truesize + sizeof(struct sctp_chunk)); |
3ab224be | 145 | sk_mem_charge(sk, chunk->skb->truesize); |
1da177e4 LT |
146 | } |
147 | ||
d04adf1b XL |
148 | static void sctp_clear_owner_w(struct sctp_chunk *chunk) |
149 | { | |
150 | skb_orphan(chunk->skb); | |
151 | } | |
152 | ||
5c3e82fe QH |
153 | #define traverse_and_process() \ |
154 | do { \ | |
155 | msg = chunk->msg; \ | |
156 | if (msg == prev_msg) \ | |
157 | continue; \ | |
158 | list_for_each_entry(c, &msg->chunks, frag_list) { \ | |
159 | if ((clear && asoc->base.sk == c->skb->sk) || \ | |
160 | (!clear && asoc->base.sk != c->skb->sk)) \ | |
161 | cb(c); \ | |
162 | } \ | |
163 | prev_msg = msg; \ | |
164 | } while (0) | |
165 | ||
d04adf1b | 166 | static void sctp_for_each_tx_datachunk(struct sctp_association *asoc, |
5c3e82fe | 167 | bool clear, |
d04adf1b XL |
168 | void (*cb)(struct sctp_chunk *)) |
169 | ||
170 | { | |
5c3e82fe | 171 | struct sctp_datamsg *msg, *prev_msg = NULL; |
d04adf1b | 172 | struct sctp_outq *q = &asoc->outqueue; |
5c3e82fe | 173 | struct sctp_chunk *chunk, *c; |
d04adf1b | 174 | struct sctp_transport *t; |
d04adf1b XL |
175 | |
176 | list_for_each_entry(t, &asoc->peer.transport_addr_list, transports) | |
177 | list_for_each_entry(chunk, &t->transmitted, transmitted_list) | |
5c3e82fe | 178 | traverse_and_process(); |
d04adf1b | 179 | |
a8dd3979 | 180 | list_for_each_entry(chunk, &q->retransmit, transmitted_list) |
5c3e82fe | 181 | traverse_and_process(); |
d04adf1b | 182 | |
a8dd3979 | 183 | list_for_each_entry(chunk, &q->sacked, transmitted_list) |
5c3e82fe | 184 | traverse_and_process(); |
d04adf1b | 185 | |
a8dd3979 | 186 | list_for_each_entry(chunk, &q->abandoned, transmitted_list) |
5c3e82fe | 187 | traverse_and_process(); |
d04adf1b XL |
188 | |
189 | list_for_each_entry(chunk, &q->out_chunk_list, list) | |
5c3e82fe | 190 | traverse_and_process(); |
d04adf1b XL |
191 | } |
192 | ||
13228238 XL |
193 | static void sctp_for_each_rx_skb(struct sctp_association *asoc, struct sock *sk, |
194 | void (*cb)(struct sk_buff *, struct sock *)) | |
195 | ||
196 | { | |
197 | struct sk_buff *skb, *tmp; | |
198 | ||
199 | sctp_skb_for_each(skb, &asoc->ulpq.lobby, tmp) | |
200 | cb(skb, sk); | |
201 | ||
202 | sctp_skb_for_each(skb, &asoc->ulpq.reasm, tmp) | |
203 | cb(skb, sk); | |
204 | ||
205 | sctp_skb_for_each(skb, &asoc->ulpq.reasm_uo, tmp) | |
206 | cb(skb, sk); | |
207 | } | |
208 | ||
1da177e4 LT |
209 | /* Verify that this is a valid address. */ |
210 | static inline int sctp_verify_addr(struct sock *sk, union sctp_addr *addr, | |
211 | int len) | |
212 | { | |
213 | struct sctp_af *af; | |
214 | ||
215 | /* Verify basic sockaddr. */ | |
216 | af = sctp_sockaddr_af(sctp_sk(sk), addr, len); | |
217 | if (!af) | |
218 | return -EINVAL; | |
219 | ||
220 | /* Is this a valid SCTP address? */ | |
5636bef7 | 221 | if (!af->addr_valid(addr, sctp_sk(sk), NULL)) |
1da177e4 LT |
222 | return -EINVAL; |
223 | ||
224 | if (!sctp_sk(sk)->pf->send_verify(sctp_sk(sk), (addr))) | |
225 | return -EINVAL; | |
226 | ||
227 | return 0; | |
228 | } | |
229 | ||
230 | /* Look up the association by its id. If this is not a UDP-style | |
231 | * socket, the ID field is always ignored. | |
232 | */ | |
233 | struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id) | |
234 | { | |
235 | struct sctp_association *asoc = NULL; | |
236 | ||
237 | /* If this is not a UDP-style socket, assoc id should be ignored. */ | |
238 | if (!sctp_style(sk, UDP)) { | |
239 | /* Return NULL if the socket state is not ESTABLISHED. It | |
240 | * could be a TCP-style listening socket or a socket which | |
241 | * hasn't yet called connect() to establish an association. | |
242 | */ | |
e5b13f34 | 243 | if (!sctp_sstate(sk, ESTABLISHED) && !sctp_sstate(sk, CLOSING)) |
1da177e4 LT |
244 | return NULL; |
245 | ||
246 | /* Get the first and the only association from the list. */ | |
247 | if (!list_empty(&sctp_sk(sk)->ep->asocs)) | |
248 | asoc = list_entry(sctp_sk(sk)->ep->asocs.next, | |
249 | struct sctp_association, asocs); | |
250 | return asoc; | |
251 | } | |
252 | ||
253 | /* Otherwise this is a UDP-style socket. */ | |
80df2704 | 254 | if (id <= SCTP_ALL_ASSOC) |
1da177e4 LT |
255 | return NULL; |
256 | ||
257 | spin_lock_bh(&sctp_assocs_id_lock); | |
258 | asoc = (struct sctp_association *)idr_find(&sctp_assocs_id, (int)id); | |
b336deca MRL |
259 | if (asoc && (asoc->base.sk != sk || asoc->base.dead)) |
260 | asoc = NULL; | |
1da177e4 LT |
261 | spin_unlock_bh(&sctp_assocs_id_lock); |
262 | ||
1da177e4 LT |
263 | return asoc; |
264 | } | |
265 | ||
266 | /* Look up the transport from an address and an assoc id. If both address and | |
267 | * id are specified, the associations matching the address and the id should be | |
268 | * the same. | |
269 | */ | |
270 | static struct sctp_transport *sctp_addr_id2transport(struct sock *sk, | |
271 | struct sockaddr_storage *addr, | |
272 | sctp_assoc_t id) | |
273 | { | |
274 | struct sctp_association *addr_asoc = NULL, *id_asoc = NULL; | |
6f29a130 | 275 | struct sctp_af *af = sctp_get_af_specific(addr->ss_family); |
1da177e4 | 276 | union sctp_addr *laddr = (union sctp_addr *)addr; |
6f29a130 XL |
277 | struct sctp_transport *transport; |
278 | ||
912964ea | 279 | if (!af || sctp_verify_addr(sk, laddr, af->sockaddr_len)) |
6f29a130 | 280 | return NULL; |
1da177e4 | 281 | |
1da177e4 | 282 | addr_asoc = sctp_endpoint_lookup_assoc(sctp_sk(sk)->ep, |
cd4ff034 | 283 | laddr, |
1da177e4 | 284 | &transport); |
1da177e4 LT |
285 | |
286 | if (!addr_asoc) | |
287 | return NULL; | |
288 | ||
289 | id_asoc = sctp_id2assoc(sk, id); | |
290 | if (id_asoc && (id_asoc != addr_asoc)) | |
291 | return NULL; | |
292 | ||
299ee123 | 293 | sctp_get_pf_specific(sk->sk_family)->addr_to_user(sctp_sk(sk), |
1da177e4 LT |
294 | (union sctp_addr *)addr); |
295 | ||
296 | return transport; | |
297 | } | |
298 | ||
299 | /* API 3.1.2 bind() - UDP Style Syntax | |
300 | * The syntax of bind() is, | |
301 | * | |
302 | * ret = bind(int sd, struct sockaddr *addr, int addrlen); | |
303 | * | |
304 | * sd - the socket descriptor returned by socket(). | |
305 | * addr - the address structure (struct sockaddr_in or struct | |
306 | * sockaddr_in6 [RFC 2553]), | |
307 | * addr_len - the size of the address structure. | |
308 | */ | |
dda91928 | 309 | static int sctp_bind(struct sock *sk, struct sockaddr *addr, int addr_len) |
1da177e4 LT |
310 | { |
311 | int retval = 0; | |
312 | ||
048ed4b6 | 313 | lock_sock(sk); |
1da177e4 | 314 | |
bb33381d DB |
315 | pr_debug("%s: sk:%p, addr:%p, addr_len:%d\n", __func__, sk, |
316 | addr, addr_len); | |
1da177e4 LT |
317 | |
318 | /* Disallow binding twice. */ | |
319 | if (!sctp_sk(sk)->ep->base.bind_addr.port) | |
3f7a87d2 | 320 | retval = sctp_do_bind(sk, (union sctp_addr *)addr, |
1da177e4 LT |
321 | addr_len); |
322 | else | |
323 | retval = -EINVAL; | |
324 | ||
048ed4b6 | 325 | release_sock(sk); |
1da177e4 LT |
326 | |
327 | return retval; | |
328 | } | |
329 | ||
8e2ef6ab | 330 | static int sctp_get_port_local(struct sock *, union sctp_addr *); |
1da177e4 LT |
331 | |
332 | /* Verify this is a valid sockaddr. */ | |
333 | static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt, | |
334 | union sctp_addr *addr, int len) | |
335 | { | |
336 | struct sctp_af *af; | |
337 | ||
338 | /* Check minimum size. */ | |
339 | if (len < sizeof (struct sockaddr)) | |
340 | return NULL; | |
341 | ||
c5006b8a XL |
342 | if (!opt->pf->af_supported(addr->sa.sa_family, opt)) |
343 | return NULL; | |
344 | ||
81e98370 ED |
345 | if (addr->sa.sa_family == AF_INET6) { |
346 | if (len < SIN6_LEN_RFC2133) | |
347 | return NULL; | |
348 | /* V4 mapped address are really of AF_INET family */ | |
349 | if (ipv6_addr_v4mapped(&addr->v6.sin6_addr) && | |
350 | !opt->pf->af_supported(AF_INET, opt)) | |
351 | return NULL; | |
352 | } | |
1da177e4 LT |
353 | |
354 | /* If we get this far, af is valid. */ | |
355 | af = sctp_get_af_specific(addr->sa.sa_family); | |
356 | ||
357 | if (len < af->sockaddr_len) | |
358 | return NULL; | |
359 | ||
360 | return af; | |
361 | } | |
362 | ||
34e5b011 XL |
363 | static void sctp_auto_asconf_init(struct sctp_sock *sp) |
364 | { | |
365 | struct net *net = sock_net(&sp->inet.sk); | |
366 | ||
367 | if (net->sctp.default_auto_asconf) { | |
6feb37b3 | 368 | spin_lock_bh(&net->sctp.addr_wq_lock); |
34e5b011 | 369 | list_add_tail(&sp->auto_asconf_list, &net->sctp.auto_asconf_splist); |
6feb37b3 | 370 | spin_unlock_bh(&net->sctp.addr_wq_lock); |
34e5b011 XL |
371 | sp->do_auto_asconf = 1; |
372 | } | |
373 | } | |
374 | ||
1da177e4 | 375 | /* Bind a local address either to an endpoint or to an association. */ |
dda91928 | 376 | static int sctp_do_bind(struct sock *sk, union sctp_addr *addr, int len) |
1da177e4 | 377 | { |
3594698a | 378 | struct net *net = sock_net(sk); |
1da177e4 LT |
379 | struct sctp_sock *sp = sctp_sk(sk); |
380 | struct sctp_endpoint *ep = sp->ep; | |
381 | struct sctp_bind_addr *bp = &ep->base.bind_addr; | |
382 | struct sctp_af *af; | |
383 | unsigned short snum; | |
384 | int ret = 0; | |
385 | ||
1da177e4 LT |
386 | /* Common sockaddr verification. */ |
387 | af = sctp_sockaddr_af(sp, addr, len); | |
3f7a87d2 | 388 | if (!af) { |
bb33381d DB |
389 | pr_debug("%s: sk:%p, newaddr:%p, len:%d EINVAL\n", |
390 | __func__, sk, addr, len); | |
1da177e4 | 391 | return -EINVAL; |
3f7a87d2 FF |
392 | } |
393 | ||
394 | snum = ntohs(addr->v4.sin_port); | |
395 | ||
bb33381d DB |
396 | pr_debug("%s: sk:%p, new addr:%pISc, port:%d, new port:%d, len:%d\n", |
397 | __func__, sk, &addr->sa, bp->port, snum, len); | |
1da177e4 LT |
398 | |
399 | /* PF specific bind() address verification. */ | |
400 | if (!sp->pf->bind_verify(sp, addr)) | |
401 | return -EADDRNOTAVAIL; | |
402 | ||
8b358056 VY |
403 | /* We must either be unbound, or bind to the same port. |
404 | * It's OK to allow 0 ports if we are already bound. | |
405 | * We'll just inhert an already bound port in this case | |
406 | */ | |
407 | if (bp->port) { | |
408 | if (!snum) | |
409 | snum = bp->port; | |
410 | else if (snum != bp->port) { | |
bb33381d DB |
411 | pr_debug("%s: new port %d doesn't match existing port " |
412 | "%d\n", __func__, snum, bp->port); | |
8b358056 VY |
413 | return -EINVAL; |
414 | } | |
1da177e4 LT |
415 | } |
416 | ||
82f31ebf | 417 | if (snum && inet_port_requires_bind_service(net, snum) && |
3594698a | 418 | !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE)) |
1da177e4 LT |
419 | return -EACCES; |
420 | ||
4e54064e VY |
421 | /* See if the address matches any of the addresses we may have |
422 | * already bound before checking against other endpoints. | |
423 | */ | |
424 | if (sctp_bind_addr_match(bp, addr, sp)) | |
425 | return -EINVAL; | |
426 | ||
1da177e4 LT |
427 | /* Make sure we are allowed to bind here. |
428 | * The function sctp_get_port_local() does duplicate address | |
429 | * detection. | |
430 | */ | |
2772b495 | 431 | addr->v4.sin_port = htons(snum); |
e0e4b8de | 432 | if (sctp_get_port_local(sk, addr)) |
4e54064e | 433 | return -EADDRINUSE; |
1da177e4 LT |
434 | |
435 | /* Refresh ephemeral port. */ | |
34e5b011 | 436 | if (!bp->port) { |
c720c7e8 | 437 | bp->port = inet_sk(sk)->inet_num; |
34e5b011 XL |
438 | sctp_auto_asconf_init(sp); |
439 | } | |
1da177e4 | 440 | |
559cf710 VY |
441 | /* Add the address to the bind address list. |
442 | * Use GFP_ATOMIC since BHs will be disabled. | |
443 | */ | |
133800d1 MRL |
444 | ret = sctp_add_bind_addr(bp, addr, af->sockaddr_len, |
445 | SCTP_ADDR_SRC, GFP_ATOMIC); | |
1da177e4 | 446 | |
29b99f54 MW |
447 | if (ret) { |
448 | sctp_put_port(sk); | |
449 | return ret; | |
1da177e4 | 450 | } |
29b99f54 MW |
451 | /* Copy back into socket for getsockname() use. */ |
452 | inet_sk(sk)->inet_sport = htons(inet_sk(sk)->inet_num); | |
453 | sp->pf->to_sk_saddr(addr, sk); | |
1da177e4 LT |
454 | |
455 | return ret; | |
456 | } | |
457 | ||
458 | /* ADDIP Section 4.1.1 Congestion Control of ASCONF Chunks | |
459 | * | |
d808ad9a | 460 | * R1) One and only one ASCONF Chunk MAY be in transit and unacknowledged |
1da177e4 | 461 | * at any one time. If a sender, after sending an ASCONF chunk, decides |
d808ad9a | 462 | * it needs to transfer another ASCONF Chunk, it MUST wait until the |
1da177e4 | 463 | * ASCONF-ACK Chunk returns from the previous ASCONF Chunk before sending a |
d808ad9a YH |
464 | * subsequent ASCONF. Note this restriction binds each side, so at any |
465 | * time two ASCONF may be in-transit on any given association (one sent | |
1da177e4 LT |
466 | * from each endpoint). |
467 | */ | |
468 | static int sctp_send_asconf(struct sctp_association *asoc, | |
469 | struct sctp_chunk *chunk) | |
470 | { | |
4e7696d9 | 471 | int retval = 0; |
1da177e4 LT |
472 | |
473 | /* If there is an outstanding ASCONF chunk, queue it for later | |
474 | * transmission. | |
d808ad9a | 475 | */ |
1da177e4 | 476 | if (asoc->addip_last_asconf) { |
79af02c2 | 477 | list_add_tail(&chunk->list, &asoc->addip_chunk_list); |
d808ad9a | 478 | goto out; |
1da177e4 LT |
479 | } |
480 | ||
481 | /* Hold the chunk until an ASCONF_ACK is received. */ | |
482 | sctp_chunk_hold(chunk); | |
4e7696d9 | 483 | retval = sctp_primitive_ASCONF(asoc->base.net, asoc, chunk); |
1da177e4 LT |
484 | if (retval) |
485 | sctp_chunk_free(chunk); | |
486 | else | |
487 | asoc->addip_last_asconf = chunk; | |
488 | ||
489 | out: | |
490 | return retval; | |
491 | } | |
492 | ||
493 | /* Add a list of addresses as bind addresses to local endpoint or | |
494 | * association. | |
495 | * | |
496 | * Basically run through each address specified in the addrs/addrcnt | |
497 | * array/length pair, determine if it is IPv6 or IPv4 and call | |
498 | * sctp_do_bind() on it. | |
499 | * | |
500 | * If any of them fails, then the operation will be reversed and the | |
501 | * ones that were added will be removed. | |
502 | * | |
503 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
504 | */ | |
04675210 | 505 | static int sctp_bindx_add(struct sock *sk, struct sockaddr *addrs, int addrcnt) |
1da177e4 LT |
506 | { |
507 | int cnt; | |
508 | int retval = 0; | |
509 | void *addr_buf; | |
510 | struct sockaddr *sa_addr; | |
511 | struct sctp_af *af; | |
512 | ||
bb33381d DB |
513 | pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", __func__, sk, |
514 | addrs, addrcnt); | |
1da177e4 LT |
515 | |
516 | addr_buf = addrs; | |
517 | for (cnt = 0; cnt < addrcnt; cnt++) { | |
518 | /* The list may contain either IPv4 or IPv6 address; | |
519 | * determine the address length for walking thru the list. | |
520 | */ | |
ea110733 | 521 | sa_addr = addr_buf; |
1da177e4 LT |
522 | af = sctp_get_af_specific(sa_addr->sa_family); |
523 | if (!af) { | |
524 | retval = -EINVAL; | |
525 | goto err_bindx_add; | |
526 | } | |
527 | ||
d808ad9a | 528 | retval = sctp_do_bind(sk, (union sctp_addr *)sa_addr, |
1da177e4 LT |
529 | af->sockaddr_len); |
530 | ||
531 | addr_buf += af->sockaddr_len; | |
532 | ||
533 | err_bindx_add: | |
534 | if (retval < 0) { | |
535 | /* Failed. Cleanup the ones that have been added */ | |
536 | if (cnt > 0) | |
537 | sctp_bindx_rem(sk, addrs, cnt); | |
538 | return retval; | |
539 | } | |
540 | } | |
541 | ||
542 | return retval; | |
543 | } | |
544 | ||
545 | /* Send an ASCONF chunk with Add IP address parameters to all the peers of the | |
546 | * associations that are part of the endpoint indicating that a list of local | |
547 | * addresses are added to the endpoint. | |
548 | * | |
d808ad9a | 549 | * If any of the addresses is already in the bind address list of the |
1da177e4 LT |
550 | * association, we do not send the chunk for that association. But it will not |
551 | * affect other associations. | |
552 | * | |
553 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
554 | */ | |
d808ad9a | 555 | static int sctp_send_asconf_add_ip(struct sock *sk, |
1da177e4 LT |
556 | struct sockaddr *addrs, |
557 | int addrcnt) | |
558 | { | |
559 | struct sctp_sock *sp; | |
560 | struct sctp_endpoint *ep; | |
561 | struct sctp_association *asoc; | |
562 | struct sctp_bind_addr *bp; | |
563 | struct sctp_chunk *chunk; | |
564 | struct sctp_sockaddr_entry *laddr; | |
565 | union sctp_addr *addr; | |
dc022a98 | 566 | union sctp_addr saveaddr; |
1da177e4 LT |
567 | void *addr_buf; |
568 | struct sctp_af *af; | |
1da177e4 LT |
569 | struct list_head *p; |
570 | int i; | |
571 | int retval = 0; | |
572 | ||
1da177e4 LT |
573 | sp = sctp_sk(sk); |
574 | ep = sp->ep; | |
575 | ||
4e27428f XL |
576 | if (!ep->asconf_enable) |
577 | return retval; | |
578 | ||
bb33381d DB |
579 | pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", |
580 | __func__, sk, addrs, addrcnt); | |
1da177e4 | 581 | |
9dbc15f0 | 582 | list_for_each_entry(asoc, &ep->asocs, asocs) { |
1da177e4 LT |
583 | if (!asoc->peer.asconf_capable) |
584 | continue; | |
585 | ||
586 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_ADD_IP) | |
587 | continue; | |
588 | ||
589 | if (!sctp_state(asoc, ESTABLISHED)) | |
590 | continue; | |
591 | ||
592 | /* Check if any address in the packed array of addresses is | |
d808ad9a YH |
593 | * in the bind address list of the association. If so, |
594 | * do not send the asconf chunk to its peer, but continue with | |
1da177e4 LT |
595 | * other associations. |
596 | */ | |
597 | addr_buf = addrs; | |
598 | for (i = 0; i < addrcnt; i++) { | |
ea110733 | 599 | addr = addr_buf; |
1da177e4 LT |
600 | af = sctp_get_af_specific(addr->v4.sin_family); |
601 | if (!af) { | |
602 | retval = -EINVAL; | |
603 | goto out; | |
604 | } | |
605 | ||
606 | if (sctp_assoc_lookup_laddr(asoc, addr)) | |
607 | break; | |
608 | ||
609 | addr_buf += af->sockaddr_len; | |
610 | } | |
611 | if (i < addrcnt) | |
612 | continue; | |
613 | ||
559cf710 VY |
614 | /* Use the first valid address in bind addr list of |
615 | * association as Address Parameter of ASCONF CHUNK. | |
1da177e4 | 616 | */ |
1da177e4 LT |
617 | bp = &asoc->base.bind_addr; |
618 | p = bp->address_list.next; | |
619 | laddr = list_entry(p, struct sctp_sockaddr_entry, list); | |
5ae955cf | 620 | chunk = sctp_make_asconf_update_ip(asoc, &laddr->a, addrs, |
1da177e4 LT |
621 | addrcnt, SCTP_PARAM_ADD_IP); |
622 | if (!chunk) { | |
623 | retval = -ENOMEM; | |
624 | goto out; | |
625 | } | |
626 | ||
dc022a98 SS |
627 | /* Add the new addresses to the bind address list with |
628 | * use_as_src set to 0. | |
1da177e4 | 629 | */ |
dc022a98 SS |
630 | addr_buf = addrs; |
631 | for (i = 0; i < addrcnt; i++) { | |
ea110733 | 632 | addr = addr_buf; |
dc022a98 SS |
633 | af = sctp_get_af_specific(addr->v4.sin_family); |
634 | memcpy(&saveaddr, addr, af->sockaddr_len); | |
f57d96b2 | 635 | retval = sctp_add_bind_addr(bp, &saveaddr, |
133800d1 | 636 | sizeof(saveaddr), |
f57d96b2 | 637 | SCTP_ADDR_NEW, GFP_ATOMIC); |
dc022a98 SS |
638 | addr_buf += af->sockaddr_len; |
639 | } | |
8a07eb0a MH |
640 | if (asoc->src_out_of_asoc_ok) { |
641 | struct sctp_transport *trans; | |
642 | ||
643 | list_for_each_entry(trans, | |
644 | &asoc->peer.transport_addr_list, transports) { | |
8a07eb0a MH |
645 | trans->cwnd = min(4*asoc->pathmtu, max_t(__u32, |
646 | 2*asoc->pathmtu, 4380)); | |
647 | trans->ssthresh = asoc->peer.i.a_rwnd; | |
648 | trans->rto = asoc->rto_initial; | |
196d6759 | 649 | sctp_max_rto(asoc, trans); |
8a07eb0a | 650 | trans->rtt = trans->srtt = trans->rttvar = 0; |
6e91b578 | 651 | /* Clear the source and route cache */ |
8a07eb0a | 652 | sctp_transport_route(trans, NULL, |
6e91b578 | 653 | sctp_sk(asoc->base.sk)); |
8a07eb0a MH |
654 | } |
655 | } | |
656 | retval = sctp_send_asconf(asoc, chunk); | |
1da177e4 LT |
657 | } |
658 | ||
659 | out: | |
660 | return retval; | |
661 | } | |
662 | ||
663 | /* Remove a list of addresses from bind addresses list. Do not remove the | |
664 | * last address. | |
665 | * | |
666 | * Basically run through each address specified in the addrs/addrcnt | |
667 | * array/length pair, determine if it is IPv6 or IPv4 and call | |
668 | * sctp_del_bind() on it. | |
669 | * | |
670 | * If any of them fails, then the operation will be reversed and the | |
671 | * ones that were removed will be added back. | |
672 | * | |
673 | * At least one address has to be left; if only one address is | |
674 | * available, the operation will return -EBUSY. | |
675 | * | |
676 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
677 | */ | |
04675210 | 678 | static int sctp_bindx_rem(struct sock *sk, struct sockaddr *addrs, int addrcnt) |
1da177e4 LT |
679 | { |
680 | struct sctp_sock *sp = sctp_sk(sk); | |
681 | struct sctp_endpoint *ep = sp->ep; | |
682 | int cnt; | |
683 | struct sctp_bind_addr *bp = &ep->base.bind_addr; | |
684 | int retval = 0; | |
1da177e4 | 685 | void *addr_buf; |
c9a08505 | 686 | union sctp_addr *sa_addr; |
1da177e4 LT |
687 | struct sctp_af *af; |
688 | ||
bb33381d DB |
689 | pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", |
690 | __func__, sk, addrs, addrcnt); | |
1da177e4 LT |
691 | |
692 | addr_buf = addrs; | |
693 | for (cnt = 0; cnt < addrcnt; cnt++) { | |
694 | /* If the bind address list is empty or if there is only one | |
695 | * bind address, there is nothing more to be removed (we need | |
696 | * at least one address here). | |
697 | */ | |
698 | if (list_empty(&bp->address_list) || | |
699 | (sctp_list_single_entry(&bp->address_list))) { | |
700 | retval = -EBUSY; | |
701 | goto err_bindx_rem; | |
702 | } | |
703 | ||
ea110733 | 704 | sa_addr = addr_buf; |
c9a08505 | 705 | af = sctp_get_af_specific(sa_addr->sa.sa_family); |
1da177e4 LT |
706 | if (!af) { |
707 | retval = -EINVAL; | |
708 | goto err_bindx_rem; | |
709 | } | |
0304ff8a PG |
710 | |
711 | if (!af->addr_valid(sa_addr, sp, NULL)) { | |
712 | retval = -EADDRNOTAVAIL; | |
713 | goto err_bindx_rem; | |
714 | } | |
715 | ||
ee9cbaca VY |
716 | if (sa_addr->v4.sin_port && |
717 | sa_addr->v4.sin_port != htons(bp->port)) { | |
1da177e4 LT |
718 | retval = -EINVAL; |
719 | goto err_bindx_rem; | |
720 | } | |
721 | ||
ee9cbaca VY |
722 | if (!sa_addr->v4.sin_port) |
723 | sa_addr->v4.sin_port = htons(bp->port); | |
724 | ||
1da177e4 LT |
725 | /* FIXME - There is probably a need to check if sk->sk_saddr and |
726 | * sk->sk_rcv_addr are currently set to one of the addresses to | |
727 | * be removed. This is something which needs to be looked into | |
728 | * when we are fixing the outstanding issues with multi-homing | |
729 | * socket routing and failover schemes. Refer to comments in | |
730 | * sctp_do_bind(). -daisy | |
731 | */ | |
0ed90fb0 | 732 | retval = sctp_del_bind_addr(bp, sa_addr); |
1da177e4 LT |
733 | |
734 | addr_buf += af->sockaddr_len; | |
735 | err_bindx_rem: | |
736 | if (retval < 0) { | |
737 | /* Failed. Add the ones that has been removed back */ | |
738 | if (cnt > 0) | |
739 | sctp_bindx_add(sk, addrs, cnt); | |
740 | return retval; | |
741 | } | |
742 | } | |
743 | ||
744 | return retval; | |
745 | } | |
746 | ||
747 | /* Send an ASCONF chunk with Delete IP address parameters to all the peers of | |
748 | * the associations that are part of the endpoint indicating that a list of | |
749 | * local addresses are removed from the endpoint. | |
750 | * | |
d808ad9a | 751 | * If any of the addresses is already in the bind address list of the |
1da177e4 LT |
752 | * association, we do not send the chunk for that association. But it will not |
753 | * affect other associations. | |
754 | * | |
755 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
756 | */ | |
757 | static int sctp_send_asconf_del_ip(struct sock *sk, | |
758 | struct sockaddr *addrs, | |
759 | int addrcnt) | |
760 | { | |
761 | struct sctp_sock *sp; | |
762 | struct sctp_endpoint *ep; | |
763 | struct sctp_association *asoc; | |
dc022a98 | 764 | struct sctp_transport *transport; |
1da177e4 LT |
765 | struct sctp_bind_addr *bp; |
766 | struct sctp_chunk *chunk; | |
767 | union sctp_addr *laddr; | |
768 | void *addr_buf; | |
769 | struct sctp_af *af; | |
dc022a98 | 770 | struct sctp_sockaddr_entry *saddr; |
1da177e4 LT |
771 | int i; |
772 | int retval = 0; | |
8a07eb0a | 773 | int stored = 0; |
1da177e4 | 774 | |
8a07eb0a | 775 | chunk = NULL; |
1da177e4 LT |
776 | sp = sctp_sk(sk); |
777 | ep = sp->ep; | |
778 | ||
4e27428f XL |
779 | if (!ep->asconf_enable) |
780 | return retval; | |
781 | ||
bb33381d DB |
782 | pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", |
783 | __func__, sk, addrs, addrcnt); | |
1da177e4 | 784 | |
9dbc15f0 | 785 | list_for_each_entry(asoc, &ep->asocs, asocs) { |
1da177e4 LT |
786 | |
787 | if (!asoc->peer.asconf_capable) | |
788 | continue; | |
789 | ||
790 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_DEL_IP) | |
791 | continue; | |
792 | ||
793 | if (!sctp_state(asoc, ESTABLISHED)) | |
794 | continue; | |
795 | ||
796 | /* Check if any address in the packed array of addresses is | |
d808ad9a | 797 | * not present in the bind address list of the association. |
1da177e4 LT |
798 | * If so, do not send the asconf chunk to its peer, but |
799 | * continue with other associations. | |
800 | */ | |
801 | addr_buf = addrs; | |
802 | for (i = 0; i < addrcnt; i++) { | |
ea110733 | 803 | laddr = addr_buf; |
1da177e4 LT |
804 | af = sctp_get_af_specific(laddr->v4.sin_family); |
805 | if (!af) { | |
806 | retval = -EINVAL; | |
807 | goto out; | |
808 | } | |
809 | ||
810 | if (!sctp_assoc_lookup_laddr(asoc, laddr)) | |
811 | break; | |
812 | ||
813 | addr_buf += af->sockaddr_len; | |
814 | } | |
815 | if (i < addrcnt) | |
816 | continue; | |
817 | ||
818 | /* Find one address in the association's bind address list | |
819 | * that is not in the packed array of addresses. This is to | |
820 | * make sure that we do not delete all the addresses in the | |
821 | * association. | |
822 | */ | |
1da177e4 LT |
823 | bp = &asoc->base.bind_addr; |
824 | laddr = sctp_find_unmatch_addr(bp, (union sctp_addr *)addrs, | |
825 | addrcnt, sp); | |
8a07eb0a MH |
826 | if ((laddr == NULL) && (addrcnt == 1)) { |
827 | if (asoc->asconf_addr_del_pending) | |
828 | continue; | |
829 | asoc->asconf_addr_del_pending = | |
830 | kzalloc(sizeof(union sctp_addr), GFP_ATOMIC); | |
6d65e5ee MH |
831 | if (asoc->asconf_addr_del_pending == NULL) { |
832 | retval = -ENOMEM; | |
833 | goto out; | |
834 | } | |
8a07eb0a MH |
835 | asoc->asconf_addr_del_pending->sa.sa_family = |
836 | addrs->sa_family; | |
837 | asoc->asconf_addr_del_pending->v4.sin_port = | |
838 | htons(bp->port); | |
839 | if (addrs->sa_family == AF_INET) { | |
840 | struct sockaddr_in *sin; | |
841 | ||
842 | sin = (struct sockaddr_in *)addrs; | |
843 | asoc->asconf_addr_del_pending->v4.sin_addr.s_addr = sin->sin_addr.s_addr; | |
844 | } else if (addrs->sa_family == AF_INET6) { | |
845 | struct sockaddr_in6 *sin6; | |
846 | ||
847 | sin6 = (struct sockaddr_in6 *)addrs; | |
4e3fd7a0 | 848 | asoc->asconf_addr_del_pending->v6.sin6_addr = sin6->sin6_addr; |
8a07eb0a | 849 | } |
bb33381d DB |
850 | |
851 | pr_debug("%s: keep the last address asoc:%p %pISc at %p\n", | |
852 | __func__, asoc, &asoc->asconf_addr_del_pending->sa, | |
853 | asoc->asconf_addr_del_pending); | |
854 | ||
8a07eb0a MH |
855 | asoc->src_out_of_asoc_ok = 1; |
856 | stored = 1; | |
857 | goto skip_mkasconf; | |
858 | } | |
1da177e4 | 859 | |
88362ad8 DB |
860 | if (laddr == NULL) |
861 | return -EINVAL; | |
862 | ||
559cf710 VY |
863 | /* We do not need RCU protection throughout this loop |
864 | * because this is done under a socket lock from the | |
865 | * setsockopt call. | |
866 | */ | |
1da177e4 LT |
867 | chunk = sctp_make_asconf_update_ip(asoc, laddr, addrs, addrcnt, |
868 | SCTP_PARAM_DEL_IP); | |
869 | if (!chunk) { | |
870 | retval = -ENOMEM; | |
871 | goto out; | |
872 | } | |
873 | ||
8a07eb0a | 874 | skip_mkasconf: |
dc022a98 SS |
875 | /* Reset use_as_src flag for the addresses in the bind address |
876 | * list that are to be deleted. | |
877 | */ | |
dc022a98 SS |
878 | addr_buf = addrs; |
879 | for (i = 0; i < addrcnt; i++) { | |
ea110733 | 880 | laddr = addr_buf; |
dc022a98 | 881 | af = sctp_get_af_specific(laddr->v4.sin_family); |
559cf710 | 882 | list_for_each_entry(saddr, &bp->address_list, list) { |
5f242a13 | 883 | if (sctp_cmp_addr_exact(&saddr->a, laddr)) |
f57d96b2 | 884 | saddr->state = SCTP_ADDR_DEL; |
dc022a98 SS |
885 | } |
886 | addr_buf += af->sockaddr_len; | |
887 | } | |
1da177e4 | 888 | |
dc022a98 SS |
889 | /* Update the route and saddr entries for all the transports |
890 | * as some of the addresses in the bind address list are | |
891 | * about to be deleted and cannot be used as source addresses. | |
1da177e4 | 892 | */ |
9dbc15f0 RD |
893 | list_for_each_entry(transport, &asoc->peer.transport_addr_list, |
894 | transports) { | |
dc022a98 SS |
895 | sctp_transport_route(transport, NULL, |
896 | sctp_sk(asoc->base.sk)); | |
897 | } | |
898 | ||
8a07eb0a MH |
899 | if (stored) |
900 | /* We don't need to transmit ASCONF */ | |
901 | continue; | |
dc022a98 | 902 | retval = sctp_send_asconf(asoc, chunk); |
1da177e4 LT |
903 | } |
904 | out: | |
905 | return retval; | |
906 | } | |
907 | ||
9f7d653b MH |
908 | /* set addr events to assocs in the endpoint. ep and addr_wq must be locked */ |
909 | int sctp_asconf_mgmt(struct sctp_sock *sp, struct sctp_sockaddr_entry *addrw) | |
910 | { | |
911 | struct sock *sk = sctp_opt2sk(sp); | |
912 | union sctp_addr *addr; | |
913 | struct sctp_af *af; | |
914 | ||
915 | /* It is safe to write port space in caller. */ | |
916 | addr = &addrw->a; | |
917 | addr->v4.sin_port = htons(sp->ep->base.bind_addr.port); | |
918 | af = sctp_get_af_specific(addr->sa.sa_family); | |
919 | if (!af) | |
920 | return -EINVAL; | |
921 | if (sctp_verify_addr(sk, addr, af->sockaddr_len)) | |
922 | return -EINVAL; | |
923 | ||
924 | if (addrw->state == SCTP_ADDR_NEW) | |
925 | return sctp_send_asconf_add_ip(sk, (struct sockaddr *)addr, 1); | |
926 | else | |
927 | return sctp_send_asconf_del_ip(sk, (struct sockaddr *)addr, 1); | |
928 | } | |
929 | ||
1da177e4 LT |
930 | /* Helper for tunneling sctp_bindx() requests through sctp_setsockopt() |
931 | * | |
932 | * API 8.1 | |
933 | * int sctp_bindx(int sd, struct sockaddr *addrs, int addrcnt, | |
934 | * int flags); | |
935 | * | |
936 | * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses. | |
937 | * If the sd is an IPv6 socket, the addresses passed can either be IPv4 | |
938 | * or IPv6 addresses. | |
939 | * | |
940 | * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see | |
941 | * Section 3.1.2 for this usage. | |
942 | * | |
943 | * addrs is a pointer to an array of one or more socket addresses. Each | |
944 | * address is contained in its appropriate structure (i.e. struct | |
945 | * sockaddr_in or struct sockaddr_in6) the family of the address type | |
23c435f7 | 946 | * must be used to distinguish the address length (note that this |
1da177e4 LT |
947 | * representation is termed a "packed array" of addresses). The caller |
948 | * specifies the number of addresses in the array with addrcnt. | |
949 | * | |
950 | * On success, sctp_bindx() returns 0. On failure, sctp_bindx() returns | |
951 | * -1, and sets errno to the appropriate error code. | |
952 | * | |
953 | * For SCTP, the port given in each socket address must be the same, or | |
954 | * sctp_bindx() will fail, setting errno to EINVAL. | |
955 | * | |
956 | * The flags parameter is formed from the bitwise OR of zero or more of | |
957 | * the following currently defined flags: | |
958 | * | |
959 | * SCTP_BINDX_ADD_ADDR | |
960 | * | |
961 | * SCTP_BINDX_REM_ADDR | |
962 | * | |
963 | * SCTP_BINDX_ADD_ADDR directs SCTP to add the given addresses to the | |
964 | * association, and SCTP_BINDX_REM_ADDR directs SCTP to remove the given | |
965 | * addresses from the association. The two flags are mutually exclusive; | |
966 | * if both are given, sctp_bindx() will fail with EINVAL. A caller may | |
967 | * not remove all addresses from an association; sctp_bindx() will | |
968 | * reject such an attempt with EINVAL. | |
969 | * | |
970 | * An application can use sctp_bindx(SCTP_BINDX_ADD_ADDR) to associate | |
971 | * additional addresses with an endpoint after calling bind(). Or use | |
972 | * sctp_bindx(SCTP_BINDX_REM_ADDR) to remove some addresses a listening | |
973 | * socket is associated with so that no new association accepted will be | |
974 | * associated with those addresses. If the endpoint supports dynamic | |
975 | * address a SCTP_BINDX_REM_ADDR or SCTP_BINDX_ADD_ADDR may cause a | |
976 | * endpoint to send the appropriate message to the peer to change the | |
977 | * peers address lists. | |
978 | * | |
979 | * Adding and removing addresses from a connected association is | |
980 | * optional functionality. Implementations that do not support this | |
981 | * functionality should return EOPNOTSUPP. | |
982 | * | |
983 | * Basically do nothing but copying the addresses from user to kernel | |
984 | * land and invoking either sctp_bindx_add() or sctp_bindx_rem() on the sk. | |
3f7a87d2 FF |
985 | * This is used for tunneling the sctp_bindx() request through sctp_setsockopt() |
986 | * from userspace. | |
1da177e4 | 987 | * |
1da177e4 LT |
988 | * On exit there is no need to do sockfd_put(), sys_setsockopt() does |
989 | * it. | |
990 | * | |
991 | * sk The sk of the socket | |
05bfd366 | 992 | * addrs The pointer to the addresses |
1da177e4 LT |
993 | * addrssize Size of the addrs buffer |
994 | * op Operation to perform (add or remove, see the flags of | |
995 | * sctp_bindx) | |
996 | * | |
997 | * Returns 0 if ok, <0 errno code on error. | |
998 | */ | |
8c7517f5 CH |
999 | static int sctp_setsockopt_bindx(struct sock *sk, struct sockaddr *addrs, |
1000 | int addrs_size, int op) | |
1da177e4 | 1001 | { |
1da177e4 LT |
1002 | int err; |
1003 | int addrcnt = 0; | |
1004 | int walk_size = 0; | |
1005 | struct sockaddr *sa_addr; | |
05bfd366 | 1006 | void *addr_buf = addrs; |
1da177e4 LT |
1007 | struct sctp_af *af; |
1008 | ||
bb33381d | 1009 | pr_debug("%s: sk:%p addrs:%p addrs_size:%d opt:%d\n", |
8c7517f5 | 1010 | __func__, sk, addr_buf, addrs_size, op); |
1da177e4 LT |
1011 | |
1012 | if (unlikely(addrs_size <= 0)) | |
1013 | return -EINVAL; | |
1014 | ||
d808ad9a | 1015 | /* Walk through the addrs buffer and count the number of addresses. */ |
1da177e4 | 1016 | while (walk_size < addrs_size) { |
05bfd366 | 1017 | if (walk_size + sizeof(sa_family_t) > addrs_size) |
d7e0d19a | 1018 | return -EINVAL; |
d7e0d19a | 1019 | |
ea110733 | 1020 | sa_addr = addr_buf; |
1da177e4 LT |
1021 | af = sctp_get_af_specific(sa_addr->sa_family); |
1022 | ||
1023 | /* If the address family is not supported or if this address | |
1024 | * causes the address buffer to overflow return EINVAL. | |
d808ad9a | 1025 | */ |
05bfd366 | 1026 | if (!af || (walk_size + af->sockaddr_len) > addrs_size) |
1da177e4 | 1027 | return -EINVAL; |
1da177e4 LT |
1028 | addrcnt++; |
1029 | addr_buf += af->sockaddr_len; | |
1030 | walk_size += af->sockaddr_len; | |
1031 | } | |
1032 | ||
1033 | /* Do the work. */ | |
1034 | switch (op) { | |
1035 | case SCTP_BINDX_ADD_ADDR: | |
2277c7cd RH |
1036 | /* Allow security module to validate bindx addresses. */ |
1037 | err = security_sctp_bind_connect(sk, SCTP_SOCKOPT_BINDX_ADD, | |
05bfd366 | 1038 | addrs, addrs_size); |
2277c7cd | 1039 | if (err) |
05bfd366 CH |
1040 | return err; |
1041 | err = sctp_bindx_add(sk, addrs, addrcnt); | |
1da177e4 | 1042 | if (err) |
05bfd366 CH |
1043 | return err; |
1044 | return sctp_send_asconf_add_ip(sk, addrs, addrcnt); | |
1da177e4 | 1045 | case SCTP_BINDX_REM_ADDR: |
05bfd366 | 1046 | err = sctp_bindx_rem(sk, addrs, addrcnt); |
1da177e4 | 1047 | if (err) |
05bfd366 CH |
1048 | return err; |
1049 | return sctp_send_asconf_del_ip(sk, addrs, addrcnt); | |
1da177e4 LT |
1050 | |
1051 | default: | |
05bfd366 | 1052 | return -EINVAL; |
3ff50b79 | 1053 | } |
05bfd366 | 1054 | } |
1da177e4 | 1055 | |
c0425a42 CH |
1056 | static int sctp_bind_add(struct sock *sk, struct sockaddr *addrs, |
1057 | int addrlen) | |
1058 | { | |
1059 | int err; | |
1060 | ||
1061 | lock_sock(sk); | |
8c7517f5 | 1062 | err = sctp_setsockopt_bindx(sk, addrs, addrlen, SCTP_BINDX_ADD_ADDR); |
c0425a42 CH |
1063 | release_sock(sk); |
1064 | return err; | |
1065 | } | |
1066 | ||
f26f9951 XL |
1067 | static int sctp_connect_new_asoc(struct sctp_endpoint *ep, |
1068 | const union sctp_addr *daddr, | |
1069 | const struct sctp_initmsg *init, | |
1070 | struct sctp_transport **tp) | |
1071 | { | |
1072 | struct sctp_association *asoc; | |
1073 | struct sock *sk = ep->base.sk; | |
1074 | struct net *net = sock_net(sk); | |
1075 | enum sctp_scope scope; | |
1076 | int err; | |
1077 | ||
1078 | if (sctp_endpoint_is_peeled_off(ep, daddr)) | |
1079 | return -EADDRNOTAVAIL; | |
1080 | ||
1081 | if (!ep->base.bind_addr.port) { | |
1082 | if (sctp_autobind(sk)) | |
1083 | return -EAGAIN; | |
1084 | } else { | |
82f31ebf | 1085 | if (inet_port_requires_bind_service(net, ep->base.bind_addr.port) && |
f26f9951 XL |
1086 | !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE)) |
1087 | return -EACCES; | |
1088 | } | |
1089 | ||
1090 | scope = sctp_scope(daddr); | |
1091 | asoc = sctp_association_new(ep, sk, scope, GFP_KERNEL); | |
1092 | if (!asoc) | |
1093 | return -ENOMEM; | |
1094 | ||
1095 | err = sctp_assoc_set_bind_addr_from_ep(asoc, scope, GFP_KERNEL); | |
1096 | if (err < 0) | |
1097 | goto free; | |
1098 | ||
1099 | *tp = sctp_assoc_add_peer(asoc, daddr, GFP_KERNEL, SCTP_UNKNOWN); | |
1100 | if (!*tp) { | |
1101 | err = -ENOMEM; | |
1102 | goto free; | |
1103 | } | |
1104 | ||
1105 | if (!init) | |
1106 | return 0; | |
1107 | ||
1108 | if (init->sinit_num_ostreams) { | |
1109 | __u16 outcnt = init->sinit_num_ostreams; | |
1110 | ||
1111 | asoc->c.sinit_num_ostreams = outcnt; | |
1112 | /* outcnt has been changed, need to re-init stream */ | |
1113 | err = sctp_stream_init(&asoc->stream, outcnt, 0, GFP_KERNEL); | |
1114 | if (err) | |
1115 | goto free; | |
1116 | } | |
1117 | ||
1118 | if (init->sinit_max_instreams) | |
1119 | asoc->c.sinit_max_instreams = init->sinit_max_instreams; | |
1120 | ||
1121 | if (init->sinit_max_attempts) | |
1122 | asoc->max_init_attempts = init->sinit_max_attempts; | |
1123 | ||
1124 | if (init->sinit_max_init_timeo) | |
1125 | asoc->max_init_timeo = | |
1126 | msecs_to_jiffies(init->sinit_max_init_timeo); | |
1127 | ||
1128 | return 0; | |
1129 | free: | |
1130 | sctp_association_free(asoc); | |
1131 | return err; | |
1132 | } | |
1133 | ||
a64e59c7 XL |
1134 | static int sctp_connect_add_peer(struct sctp_association *asoc, |
1135 | union sctp_addr *daddr, int addr_len) | |
1136 | { | |
1137 | struct sctp_endpoint *ep = asoc->ep; | |
1138 | struct sctp_association *old; | |
1139 | struct sctp_transport *t; | |
1140 | int err; | |
1141 | ||
1142 | err = sctp_verify_addr(ep->base.sk, daddr, addr_len); | |
1143 | if (err) | |
1144 | return err; | |
1145 | ||
1146 | old = sctp_endpoint_lookup_assoc(ep, daddr, &t); | |
1147 | if (old && old != asoc) | |
1148 | return old->state >= SCTP_STATE_ESTABLISHED ? -EISCONN | |
1149 | : -EALREADY; | |
1150 | ||
1151 | if (sctp_endpoint_is_peeled_off(ep, daddr)) | |
1152 | return -EADDRNOTAVAIL; | |
1153 | ||
1154 | t = sctp_assoc_add_peer(asoc, daddr, GFP_KERNEL, SCTP_UNKNOWN); | |
1155 | if (!t) | |
1156 | return -ENOMEM; | |
1157 | ||
1158 | return 0; | |
1159 | } | |
1160 | ||
3f7a87d2 FF |
1161 | /* __sctp_connect(struct sock* sk, struct sockaddr *kaddrs, int addrs_size) |
1162 | * | |
1163 | * Common routine for handling connect() and sctp_connectx(). | |
1164 | * Connect will come in with just a single address. | |
1165 | */ | |
dd8378b3 XL |
1166 | static int __sctp_connect(struct sock *sk, struct sockaddr *kaddrs, |
1167 | int addrs_size, int flags, sctp_assoc_t *assoc_id) | |
3f7a87d2 | 1168 | { |
dd8378b3 XL |
1169 | struct sctp_sock *sp = sctp_sk(sk); |
1170 | struct sctp_endpoint *ep = sp->ep; | |
3f7a87d2 | 1171 | struct sctp_transport *transport; |
a64e59c7 | 1172 | struct sctp_association *asoc; |
dd8378b3 XL |
1173 | void *addr_buf = kaddrs; |
1174 | union sctp_addr *daddr; | |
dd8378b3 XL |
1175 | struct sctp_af *af; |
1176 | int walk_size, err; | |
3f7a87d2 | 1177 | long timeo; |
3f7a87d2 | 1178 | |
e5b13f34 | 1179 | if (sctp_sstate(sk, ESTABLISHED) || sctp_sstate(sk, CLOSING) || |
dd8378b3 XL |
1180 | (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))) |
1181 | return -EISCONN; | |
1182 | ||
1183 | daddr = addr_buf; | |
1184 | af = sctp_get_af_specific(daddr->sa.sa_family); | |
1185 | if (!af || af->sockaddr_len > addrs_size) | |
1186 | return -EINVAL; | |
1187 | ||
1188 | err = sctp_verify_addr(sk, daddr, af->sockaddr_len); | |
1189 | if (err) | |
1190 | return err; | |
1191 | ||
1192 | asoc = sctp_endpoint_lookup_assoc(ep, daddr, &transport); | |
1193 | if (asoc) | |
1194 | return asoc->state >= SCTP_STATE_ESTABLISHED ? -EISCONN | |
1195 | : -EALREADY; | |
1196 | ||
f26f9951 XL |
1197 | err = sctp_connect_new_asoc(ep, daddr, NULL, &transport); |
1198 | if (err) | |
1199 | return err; | |
1200 | asoc = transport->asoc; | |
3f7a87d2 | 1201 | |
dd8378b3 XL |
1202 | addr_buf += af->sockaddr_len; |
1203 | walk_size = af->sockaddr_len; | |
1204 | while (walk_size < addrs_size) { | |
1205 | err = -EINVAL; | |
1206 | if (walk_size + sizeof(sa_family_t) > addrs_size) | |
3f7a87d2 | 1207 | goto out_free; |
d7e0d19a | 1208 | |
dd8378b3 XL |
1209 | daddr = addr_buf; |
1210 | af = sctp_get_af_specific(daddr->sa.sa_family); | |
1211 | if (!af || af->sockaddr_len + walk_size > addrs_size) | |
1212 | goto out_free; | |
e4d1feab | 1213 | |
dd8378b3 | 1214 | if (asoc->peer.port != ntohs(daddr->v4.sin_port)) |
3f7a87d2 FF |
1215 | goto out_free; |
1216 | ||
a64e59c7 | 1217 | err = sctp_connect_add_peer(asoc, daddr, af->sockaddr_len); |
dd8378b3 | 1218 | if (err) |
16d00fb7 | 1219 | goto out_free; |
3f7a87d2 | 1220 | |
dd8378b3 | 1221 | addr_buf += af->sockaddr_len; |
3f7a87d2 FF |
1222 | walk_size += af->sockaddr_len; |
1223 | } | |
1224 | ||
c6ba68a2 VY |
1225 | /* In case the user of sctp_connectx() wants an association |
1226 | * id back, assign one now. | |
1227 | */ | |
1228 | if (assoc_id) { | |
1229 | err = sctp_assoc_set_id(asoc, GFP_KERNEL); | |
1230 | if (err < 0) | |
1231 | goto out_free; | |
1232 | } | |
1233 | ||
f26f9951 | 1234 | err = sctp_primitive_ASSOCIATE(sock_net(sk), asoc, NULL); |
dd8378b3 | 1235 | if (err < 0) |
3f7a87d2 | 1236 | goto out_free; |
3f7a87d2 FF |
1237 | |
1238 | /* Initialize sk's dport and daddr for getpeername() */ | |
c720c7e8 | 1239 | inet_sk(sk)->inet_dport = htons(asoc->peer.port); |
dd8378b3 | 1240 | sp->pf->to_sk_daddr(daddr, sk); |
8de8c873 | 1241 | sk->sk_err = 0; |
3f7a87d2 | 1242 | |
7233bc84 | 1243 | if (assoc_id) |
88a0a948 | 1244 | *assoc_id = asoc->assoc_id; |
2277c7cd | 1245 | |
dd8378b3 XL |
1246 | timeo = sock_sndtimeo(sk, flags & O_NONBLOCK); |
1247 | return sctp_wait_for_connect(asoc, &timeo); | |
3f7a87d2 FF |
1248 | |
1249 | out_free: | |
bb33381d DB |
1250 | pr_debug("%s: took out_free path with asoc:%p kaddrs:%p err:%d\n", |
1251 | __func__, asoc, kaddrs, err); | |
dd8378b3 | 1252 | sctp_association_free(asoc); |
3f7a87d2 FF |
1253 | return err; |
1254 | } | |
1255 | ||
1256 | /* Helper for tunneling sctp_connectx() requests through sctp_setsockopt() | |
1257 | * | |
1258 | * API 8.9 | |
88a0a948 VY |
1259 | * int sctp_connectx(int sd, struct sockaddr *addrs, int addrcnt, |
1260 | * sctp_assoc_t *asoc); | |
3f7a87d2 FF |
1261 | * |
1262 | * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses. | |
1263 | * If the sd is an IPv6 socket, the addresses passed can either be IPv4 | |
1264 | * or IPv6 addresses. | |
1265 | * | |
1266 | * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see | |
1267 | * Section 3.1.2 for this usage. | |
1268 | * | |
1269 | * addrs is a pointer to an array of one or more socket addresses. Each | |
1270 | * address is contained in its appropriate structure (i.e. struct | |
1271 | * sockaddr_in or struct sockaddr_in6) the family of the address type | |
1272 | * must be used to distengish the address length (note that this | |
1273 | * representation is termed a "packed array" of addresses). The caller | |
1274 | * specifies the number of addresses in the array with addrcnt. | |
1275 | * | |
88a0a948 VY |
1276 | * On success, sctp_connectx() returns 0. It also sets the assoc_id to |
1277 | * the association id of the new association. On failure, sctp_connectx() | |
1278 | * returns -1, and sets errno to the appropriate error code. The assoc_id | |
1279 | * is not touched by the kernel. | |
3f7a87d2 FF |
1280 | * |
1281 | * For SCTP, the port given in each socket address must be the same, or | |
1282 | * sctp_connectx() will fail, setting errno to EINVAL. | |
1283 | * | |
1284 | * An application can use sctp_connectx to initiate an association with | |
1285 | * an endpoint that is multi-homed. Much like sctp_bindx() this call | |
1286 | * allows a caller to specify multiple addresses at which a peer can be | |
1287 | * reached. The way the SCTP stack uses the list of addresses to set up | |
25985edc | 1288 | * the association is implementation dependent. This function only |
3f7a87d2 FF |
1289 | * specifies that the stack will try to make use of all the addresses in |
1290 | * the list when needed. | |
1291 | * | |
1292 | * Note that the list of addresses passed in is only used for setting up | |
1293 | * the association. It does not necessarily equal the set of addresses | |
1294 | * the peer uses for the resulting association. If the caller wants to | |
1295 | * find out the set of peer addresses, it must use sctp_getpaddrs() to | |
1296 | * retrieve them after the association has been set up. | |
1297 | * | |
1298 | * Basically do nothing but copying the addresses from user to kernel | |
1299 | * land and invoking either sctp_connectx(). This is used for tunneling | |
1300 | * the sctp_connectx() request through sctp_setsockopt() from userspace. | |
1301 | * | |
3f7a87d2 FF |
1302 | * On exit there is no need to do sockfd_put(), sys_setsockopt() does |
1303 | * it. | |
1304 | * | |
1305 | * sk The sk of the socket | |
ce5b2f89 | 1306 | * addrs The pointer to the addresses |
3f7a87d2 FF |
1307 | * addrssize Size of the addrs buffer |
1308 | * | |
88a0a948 | 1309 | * Returns >=0 if ok, <0 errno code on error. |
3f7a87d2 | 1310 | */ |
ce5b2f89 CH |
1311 | static int __sctp_setsockopt_connectx(struct sock *sk, struct sockaddr *kaddrs, |
1312 | int addrs_size, sctp_assoc_t *assoc_id) | |
3f7a87d2 | 1313 | { |
644fbdea | 1314 | int err = 0, flags = 0; |
3f7a87d2 | 1315 | |
bb33381d | 1316 | pr_debug("%s: sk:%p addrs:%p addrs_size:%d\n", |
ce5b2f89 | 1317 | __func__, sk, kaddrs, addrs_size); |
3f7a87d2 | 1318 | |
f40f1177 XL |
1319 | /* make sure the 1st addr's sa_family is accessible later */ |
1320 | if (unlikely(addrs_size < sizeof(sa_family_t))) | |
3f7a87d2 FF |
1321 | return -EINVAL; |
1322 | ||
2277c7cd RH |
1323 | /* Allow security module to validate connectx addresses. */ |
1324 | err = security_sctp_bind_connect(sk, SCTP_SOCKOPT_CONNECTX, | |
1325 | (struct sockaddr *)kaddrs, | |
1326 | addrs_size); | |
1327 | if (err) | |
ce5b2f89 | 1328 | return err; |
2277c7cd | 1329 | |
644fbdea XL |
1330 | /* in-kernel sockets don't generally have a file allocated to them |
1331 | * if all they do is call sock_create_kern(). | |
1332 | */ | |
1333 | if (sk->sk_socket->file) | |
1334 | flags = sk->sk_socket->file->f_flags; | |
1335 | ||
ce5b2f89 | 1336 | return __sctp_connect(sk, kaddrs, addrs_size, flags, assoc_id); |
3f7a87d2 FF |
1337 | } |
1338 | ||
88a0a948 VY |
1339 | /* |
1340 | * This is an older interface. It's kept for backward compatibility | |
1341 | * to the option that doesn't provide association id. | |
1342 | */ | |
26ac8e5f | 1343 | static int sctp_setsockopt_connectx_old(struct sock *sk, |
ce5b2f89 | 1344 | struct sockaddr *kaddrs, |
dda91928 | 1345 | int addrs_size) |
88a0a948 | 1346 | { |
ce5b2f89 | 1347 | return __sctp_setsockopt_connectx(sk, kaddrs, addrs_size, NULL); |
88a0a948 VY |
1348 | } |
1349 | ||
1350 | /* | |
1351 | * New interface for the API. The since the API is done with a socket | |
1352 | * option, to make it simple we feed back the association id is as a return | |
1353 | * indication to the call. Error is always negative and association id is | |
1354 | * always positive. | |
1355 | */ | |
26ac8e5f | 1356 | static int sctp_setsockopt_connectx(struct sock *sk, |
ce5b2f89 | 1357 | struct sockaddr *kaddrs, |
dda91928 | 1358 | int addrs_size) |
88a0a948 VY |
1359 | { |
1360 | sctp_assoc_t assoc_id = 0; | |
1361 | int err = 0; | |
1362 | ||
ce5b2f89 | 1363 | err = __sctp_setsockopt_connectx(sk, kaddrs, addrs_size, &assoc_id); |
88a0a948 VY |
1364 | |
1365 | if (err) | |
1366 | return err; | |
1367 | else | |
1368 | return assoc_id; | |
1369 | } | |
1370 | ||
c6ba68a2 | 1371 | /* |
f9c67811 VY |
1372 | * New (hopefully final) interface for the API. |
1373 | * We use the sctp_getaddrs_old structure so that use-space library | |
ffd59393 | 1374 | * can avoid any unnecessary allocations. The only different part |
f9c67811 | 1375 | * is that we store the actual length of the address buffer into the |
ffd59393 | 1376 | * addrs_num structure member. That way we can re-use the existing |
f9c67811 | 1377 | * code. |
c6ba68a2 | 1378 | */ |
ffd59393 DB |
1379 | #ifdef CONFIG_COMPAT |
1380 | struct compat_sctp_getaddrs_old { | |
1381 | sctp_assoc_t assoc_id; | |
1382 | s32 addr_num; | |
1383 | compat_uptr_t addrs; /* struct sockaddr * */ | |
1384 | }; | |
1385 | #endif | |
1386 | ||
26ac8e5f | 1387 | static int sctp_getsockopt_connectx3(struct sock *sk, int len, |
dda91928 DB |
1388 | char __user *optval, |
1389 | int __user *optlen) | |
c6ba68a2 | 1390 | { |
f9c67811 | 1391 | struct sctp_getaddrs_old param; |
c6ba68a2 | 1392 | sctp_assoc_t assoc_id = 0; |
ce5b2f89 | 1393 | struct sockaddr *kaddrs; |
c6ba68a2 VY |
1394 | int err = 0; |
1395 | ||
ffd59393 | 1396 | #ifdef CONFIG_COMPAT |
96c0e0a9 | 1397 | if (in_compat_syscall()) { |
ffd59393 | 1398 | struct compat_sctp_getaddrs_old param32; |
c6ba68a2 | 1399 | |
ffd59393 DB |
1400 | if (len < sizeof(param32)) |
1401 | return -EINVAL; | |
1402 | if (copy_from_user(¶m32, optval, sizeof(param32))) | |
1403 | return -EFAULT; | |
f9c67811 | 1404 | |
ffd59393 DB |
1405 | param.assoc_id = param32.assoc_id; |
1406 | param.addr_num = param32.addr_num; | |
1407 | param.addrs = compat_ptr(param32.addrs); | |
1408 | } else | |
1409 | #endif | |
1410 | { | |
1411 | if (len < sizeof(param)) | |
1412 | return -EINVAL; | |
1413 | if (copy_from_user(¶m, optval, sizeof(param))) | |
1414 | return -EFAULT; | |
1415 | } | |
c6ba68a2 | 1416 | |
ce5b2f89 CH |
1417 | kaddrs = memdup_user(param.addrs, param.addr_num); |
1418 | if (IS_ERR(kaddrs)) | |
1419 | return PTR_ERR(kaddrs); | |
1420 | ||
1421 | err = __sctp_setsockopt_connectx(sk, kaddrs, param.addr_num, &assoc_id); | |
1422 | kfree(kaddrs); | |
c6ba68a2 VY |
1423 | if (err == 0 || err == -EINPROGRESS) { |
1424 | if (copy_to_user(optval, &assoc_id, sizeof(assoc_id))) | |
1425 | return -EFAULT; | |
1426 | if (put_user(sizeof(assoc_id), optlen)) | |
1427 | return -EFAULT; | |
1428 | } | |
1429 | ||
1430 | return err; | |
1431 | } | |
1432 | ||
1da177e4 LT |
1433 | /* API 3.1.4 close() - UDP Style Syntax |
1434 | * Applications use close() to perform graceful shutdown (as described in | |
1435 | * Section 10.1 of [SCTP]) on ALL the associations currently represented | |
1436 | * by a UDP-style socket. | |
1437 | * | |
1438 | * The syntax is | |
1439 | * | |
1440 | * ret = close(int sd); | |
1441 | * | |
1442 | * sd - the socket descriptor of the associations to be closed. | |
1443 | * | |
1444 | * To gracefully shutdown a specific association represented by the | |
1445 | * UDP-style socket, an application should use the sendmsg() call, | |
1446 | * passing no user data, but including the appropriate flag in the | |
1447 | * ancillary data (see Section xxxx). | |
1448 | * | |
1449 | * If sd in the close() call is a branched-off socket representing only | |
1450 | * one association, the shutdown is performed on that association only. | |
1451 | * | |
1452 | * 4.1.6 close() - TCP Style Syntax | |
1453 | * | |
1454 | * Applications use close() to gracefully close down an association. | |
1455 | * | |
1456 | * The syntax is: | |
1457 | * | |
1458 | * int close(int sd); | |
1459 | * | |
1460 | * sd - the socket descriptor of the association to be closed. | |
1461 | * | |
1462 | * After an application calls close() on a socket descriptor, no further | |
1463 | * socket operations will succeed on that descriptor. | |
1464 | * | |
1465 | * API 7.1.4 SO_LINGER | |
1466 | * | |
1467 | * An application using the TCP-style socket can use this option to | |
1468 | * perform the SCTP ABORT primitive. The linger option structure is: | |
1469 | * | |
1470 | * struct linger { | |
1471 | * int l_onoff; // option on/off | |
1472 | * int l_linger; // linger time | |
1473 | * }; | |
1474 | * | |
1475 | * To enable the option, set l_onoff to 1. If the l_linger value is set | |
1476 | * to 0, calling close() is the same as the ABORT primitive. If the | |
1477 | * value is set to a negative value, the setsockopt() call will return | |
1478 | * an error. If the value is set to a positive value linger_time, the | |
1479 | * close() can be blocked for at most linger_time ms. If the graceful | |
1480 | * shutdown phase does not finish during this period, close() will | |
1481 | * return but the graceful shutdown phase continues in the system. | |
1482 | */ | |
dda91928 | 1483 | static void sctp_close(struct sock *sk, long timeout) |
1da177e4 | 1484 | { |
55e26eb9 | 1485 | struct net *net = sock_net(sk); |
1da177e4 LT |
1486 | struct sctp_endpoint *ep; |
1487 | struct sctp_association *asoc; | |
1488 | struct list_head *pos, *temp; | |
cd4fcc70 | 1489 | unsigned int data_was_unread; |
1da177e4 | 1490 | |
bb33381d | 1491 | pr_debug("%s: sk:%p, timeout:%ld\n", __func__, sk, timeout); |
1da177e4 | 1492 | |
6dfe4b97 | 1493 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 | 1494 | sk->sk_shutdown = SHUTDOWN_MASK; |
cbabf463 | 1495 | inet_sk_set_state(sk, SCTP_SS_CLOSING); |
1da177e4 LT |
1496 | |
1497 | ep = sctp_sk(sk)->ep; | |
1498 | ||
cd4fcc70 TG |
1499 | /* Clean up any skbs sitting on the receive queue. */ |
1500 | data_was_unread = sctp_queue_purge_ulpevents(&sk->sk_receive_queue); | |
1501 | data_was_unread += sctp_queue_purge_ulpevents(&sctp_sk(sk)->pd_lobby); | |
1502 | ||
61c9fed4 | 1503 | /* Walk all associations on an endpoint. */ |
1da177e4 LT |
1504 | list_for_each_safe(pos, temp, &ep->asocs) { |
1505 | asoc = list_entry(pos, struct sctp_association, asocs); | |
1506 | ||
1507 | if (sctp_style(sk, TCP)) { | |
1508 | /* A closed association can still be in the list if | |
1509 | * it belongs to a TCP-style listening socket that is | |
1510 | * not yet accepted. If so, free it. If not, send an | |
1511 | * ABORT or SHUTDOWN based on the linger options. | |
1512 | */ | |
1513 | if (sctp_state(asoc, CLOSED)) { | |
1da177e4 | 1514 | sctp_association_free(asoc); |
b89498a1 VY |
1515 | continue; |
1516 | } | |
1517 | } | |
1da177e4 | 1518 | |
cd4fcc70 TG |
1519 | if (data_was_unread || !skb_queue_empty(&asoc->ulpq.lobby) || |
1520 | !skb_queue_empty(&asoc->ulpq.reasm) || | |
13228238 | 1521 | !skb_queue_empty(&asoc->ulpq.reasm_uo) || |
cd4fcc70 | 1522 | (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime)) { |
b9ac8672 SS |
1523 | struct sctp_chunk *chunk; |
1524 | ||
1525 | chunk = sctp_make_abort_user(asoc, NULL, 0); | |
068d8bd3 | 1526 | sctp_primitive_ABORT(net, asoc, chunk); |
b9ac8672 | 1527 | } else |
55e26eb9 | 1528 | sctp_primitive_SHUTDOWN(net, asoc, NULL); |
1da177e4 LT |
1529 | } |
1530 | ||
1da177e4 LT |
1531 | /* On a TCP-style socket, block for at most linger_time if set. */ |
1532 | if (sctp_style(sk, TCP) && timeout) | |
1533 | sctp_wait_for_close(sk, timeout); | |
1534 | ||
1535 | /* This will run the backlog queue. */ | |
048ed4b6 | 1536 | release_sock(sk); |
1da177e4 LT |
1537 | |
1538 | /* Supposedly, no process has access to the socket, but | |
1539 | * the net layers still may. | |
01bfe5e8 XL |
1540 | * Also, sctp_destroy_sock() needs to be called with addr_wq_lock |
1541 | * held and that should be grabbed before socket lock. | |
1da177e4 | 1542 | */ |
01bfe5e8 XL |
1543 | spin_lock_bh(&net->sctp.addr_wq_lock); |
1544 | bh_lock_sock_nested(sk); | |
1da177e4 LT |
1545 | |
1546 | /* Hold the sock, since sk_common_release() will put sock_put() | |
1547 | * and we have just a little more cleanup. | |
1548 | */ | |
1549 | sock_hold(sk); | |
1550 | sk_common_release(sk); | |
1551 | ||
5bc1d1b4 | 1552 | bh_unlock_sock(sk); |
01bfe5e8 | 1553 | spin_unlock_bh(&net->sctp.addr_wq_lock); |
1da177e4 LT |
1554 | |
1555 | sock_put(sk); | |
1556 | ||
1557 | SCTP_DBG_OBJCNT_DEC(sock); | |
1558 | } | |
1559 | ||
1560 | /* Handle EPIPE error. */ | |
1561 | static int sctp_error(struct sock *sk, int flags, int err) | |
1562 | { | |
1563 | if (err == -EPIPE) | |
1564 | err = sock_error(sk) ? : -EPIPE; | |
1565 | if (err == -EPIPE && !(flags & MSG_NOSIGNAL)) | |
1566 | send_sig(SIGPIPE, current, 0); | |
1567 | return err; | |
1568 | } | |
1569 | ||
1570 | /* API 3.1.3 sendmsg() - UDP Style Syntax | |
1571 | * | |
1572 | * An application uses sendmsg() and recvmsg() calls to transmit data to | |
1573 | * and receive data from its peer. | |
1574 | * | |
1575 | * ssize_t sendmsg(int socket, const struct msghdr *message, | |
1576 | * int flags); | |
1577 | * | |
1578 | * socket - the socket descriptor of the endpoint. | |
1579 | * message - pointer to the msghdr structure which contains a single | |
1580 | * user message and possibly some ancillary data. | |
1581 | * | |
1582 | * See Section 5 for complete description of the data | |
1583 | * structures. | |
1584 | * | |
1585 | * flags - flags sent or received with the user message, see Section | |
1586 | * 5 for complete description of the flags. | |
1587 | * | |
1588 | * Note: This function could use a rewrite especially when explicit | |
1589 | * connect support comes in. | |
1590 | */ | |
1591 | /* BUG: We do not implement the equivalent of sk_stream_wait_memory(). */ | |
1592 | ||
a05437ac XL |
1593 | static int sctp_msghdr_parse(const struct msghdr *msg, |
1594 | struct sctp_cmsgs *cmsgs); | |
1da177e4 | 1595 | |
204f817f XL |
1596 | static int sctp_sendmsg_parse(struct sock *sk, struct sctp_cmsgs *cmsgs, |
1597 | struct sctp_sndrcvinfo *srinfo, | |
1598 | const struct msghdr *msg, size_t msg_len) | |
1599 | { | |
1600 | __u16 sflags; | |
1601 | int err; | |
1602 | ||
1603 | if (sctp_sstate(sk, LISTENING) && sctp_style(sk, TCP)) | |
1604 | return -EPIPE; | |
1605 | ||
1606 | if (msg_len > sk->sk_sndbuf) | |
1607 | return -EMSGSIZE; | |
1608 | ||
1609 | memset(cmsgs, 0, sizeof(*cmsgs)); | |
1610 | err = sctp_msghdr_parse(msg, cmsgs); | |
1611 | if (err) { | |
1612 | pr_debug("%s: msghdr parse err:%x\n", __func__, err); | |
1613 | return err; | |
1614 | } | |
1615 | ||
1616 | memset(srinfo, 0, sizeof(*srinfo)); | |
1617 | if (cmsgs->srinfo) { | |
1618 | srinfo->sinfo_stream = cmsgs->srinfo->sinfo_stream; | |
1619 | srinfo->sinfo_flags = cmsgs->srinfo->sinfo_flags; | |
1620 | srinfo->sinfo_ppid = cmsgs->srinfo->sinfo_ppid; | |
1621 | srinfo->sinfo_context = cmsgs->srinfo->sinfo_context; | |
1622 | srinfo->sinfo_assoc_id = cmsgs->srinfo->sinfo_assoc_id; | |
1623 | srinfo->sinfo_timetolive = cmsgs->srinfo->sinfo_timetolive; | |
1624 | } | |
1625 | ||
1626 | if (cmsgs->sinfo) { | |
1627 | srinfo->sinfo_stream = cmsgs->sinfo->snd_sid; | |
1628 | srinfo->sinfo_flags = cmsgs->sinfo->snd_flags; | |
1629 | srinfo->sinfo_ppid = cmsgs->sinfo->snd_ppid; | |
1630 | srinfo->sinfo_context = cmsgs->sinfo->snd_context; | |
1631 | srinfo->sinfo_assoc_id = cmsgs->sinfo->snd_assoc_id; | |
1632 | } | |
1633 | ||
ed63afb8 XL |
1634 | if (cmsgs->prinfo) { |
1635 | srinfo->sinfo_timetolive = cmsgs->prinfo->pr_value; | |
1636 | SCTP_PR_SET_POLICY(srinfo->sinfo_flags, | |
1637 | cmsgs->prinfo->pr_policy); | |
1638 | } | |
1639 | ||
204f817f XL |
1640 | sflags = srinfo->sinfo_flags; |
1641 | if (!sflags && msg_len) | |
1642 | return 0; | |
1643 | ||
1644 | if (sctp_style(sk, TCP) && (sflags & (SCTP_EOF | SCTP_ABORT))) | |
1645 | return -EINVAL; | |
1646 | ||
1647 | if (((sflags & SCTP_EOF) && msg_len > 0) || | |
1648 | (!(sflags & (SCTP_EOF | SCTP_ABORT)) && msg_len == 0)) | |
1649 | return -EINVAL; | |
1650 | ||
1651 | if ((sflags & SCTP_ADDR_OVER) && !msg->msg_name) | |
1652 | return -EINVAL; | |
1653 | ||
1654 | return 0; | |
1655 | } | |
1656 | ||
2bfd80f9 XL |
1657 | static int sctp_sendmsg_new_asoc(struct sock *sk, __u16 sflags, |
1658 | struct sctp_cmsgs *cmsgs, | |
1659 | union sctp_addr *daddr, | |
1660 | struct sctp_transport **tp) | |
1661 | { | |
1662 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; | |
2bfd80f9 | 1663 | struct sctp_association *asoc; |
2c0dbaa0 | 1664 | struct cmsghdr *cmsg; |
4be4139f | 1665 | __be32 flowinfo = 0; |
9eda2d2d | 1666 | struct sctp_af *af; |
d98985dd | 1667 | int err; |
2bfd80f9 XL |
1668 | |
1669 | *tp = NULL; | |
1670 | ||
1671 | if (sflags & (SCTP_EOF | SCTP_ABORT)) | |
1672 | return -EINVAL; | |
1673 | ||
1674 | if (sctp_style(sk, TCP) && (sctp_sstate(sk, ESTABLISHED) || | |
1675 | sctp_sstate(sk, CLOSING))) | |
1676 | return -EADDRNOTAVAIL; | |
1677 | ||
9eda2d2d LT |
1678 | /* Label connection socket for first association 1-to-many |
1679 | * style for client sequence socket()->sendmsg(). This | |
1680 | * needs to be done before sctp_assoc_add_peer() as that will | |
1681 | * set up the initial packet that needs to account for any | |
1682 | * security ip options (CIPSO/CALIPSO) added to the packet. | |
1683 | */ | |
1684 | af = sctp_get_af_specific(daddr->sa.sa_family); | |
1685 | if (!af) | |
1686 | return -EINVAL; | |
1687 | err = security_sctp_bind_connect(sk, SCTP_SENDMSG_CONNECT, | |
1688 | (struct sockaddr *)daddr, | |
1689 | af->sockaddr_len); | |
1690 | if (err < 0) | |
1691 | return err; | |
1da177e4 | 1692 | |
f26f9951 XL |
1693 | err = sctp_connect_new_asoc(ep, daddr, cmsgs->init, tp); |
1694 | if (err) | |
1695 | return err; | |
1696 | asoc = (*tp)->asoc; | |
2bfd80f9 | 1697 | |
2c0dbaa0 XL |
1698 | if (!cmsgs->addrs_msg) |
1699 | return 0; | |
1700 | ||
4be4139f XL |
1701 | if (daddr->sa.sa_family == AF_INET6) |
1702 | flowinfo = daddr->v6.sin6_flowinfo; | |
1703 | ||
2c0dbaa0 XL |
1704 | /* sendv addr list parse */ |
1705 | for_each_cmsghdr(cmsg, cmsgs->addrs_msg) { | |
2c0dbaa0 XL |
1706 | union sctp_addr _daddr; |
1707 | int dlen; | |
1708 | ||
1709 | if (cmsg->cmsg_level != IPPROTO_SCTP || | |
1710 | (cmsg->cmsg_type != SCTP_DSTADDRV4 && | |
1711 | cmsg->cmsg_type != SCTP_DSTADDRV6)) | |
1712 | continue; | |
1713 | ||
1714 | daddr = &_daddr; | |
1715 | memset(daddr, 0, sizeof(*daddr)); | |
1716 | dlen = cmsg->cmsg_len - sizeof(struct cmsghdr); | |
1717 | if (cmsg->cmsg_type == SCTP_DSTADDRV4) { | |
d98985dd WY |
1718 | if (dlen < sizeof(struct in_addr)) { |
1719 | err = -EINVAL; | |
2c0dbaa0 | 1720 | goto free; |
d98985dd | 1721 | } |
2c0dbaa0 XL |
1722 | |
1723 | dlen = sizeof(struct in_addr); | |
1724 | daddr->v4.sin_family = AF_INET; | |
1725 | daddr->v4.sin_port = htons(asoc->peer.port); | |
1726 | memcpy(&daddr->v4.sin_addr, CMSG_DATA(cmsg), dlen); | |
1727 | } else { | |
d98985dd WY |
1728 | if (dlen < sizeof(struct in6_addr)) { |
1729 | err = -EINVAL; | |
2c0dbaa0 | 1730 | goto free; |
d98985dd | 1731 | } |
2c0dbaa0 XL |
1732 | |
1733 | dlen = sizeof(struct in6_addr); | |
4be4139f | 1734 | daddr->v6.sin6_flowinfo = flowinfo; |
2c0dbaa0 XL |
1735 | daddr->v6.sin6_family = AF_INET6; |
1736 | daddr->v6.sin6_port = htons(asoc->peer.port); | |
1737 | memcpy(&daddr->v6.sin6_addr, CMSG_DATA(cmsg), dlen); | |
1738 | } | |
2c0dbaa0 | 1739 | |
a64e59c7 XL |
1740 | err = sctp_connect_add_peer(asoc, daddr, sizeof(*daddr)); |
1741 | if (err) | |
2c0dbaa0 | 1742 | goto free; |
2c0dbaa0 XL |
1743 | } |
1744 | ||
2bfd80f9 XL |
1745 | return 0; |
1746 | ||
1747 | free: | |
1748 | sctp_association_free(asoc); | |
1749 | return err; | |
1750 | } | |
1751 | ||
c2666de1 XL |
1752 | static int sctp_sendmsg_check_sflags(struct sctp_association *asoc, |
1753 | __u16 sflags, struct msghdr *msg, | |
1754 | size_t msg_len) | |
1755 | { | |
1756 | struct sock *sk = asoc->base.sk; | |
1757 | struct net *net = sock_net(sk); | |
1758 | ||
1759 | if (sctp_state(asoc, CLOSED) && sctp_style(sk, TCP)) | |
1760 | return -EPIPE; | |
1761 | ||
49102805 XL |
1762 | if ((sflags & SCTP_SENDALL) && sctp_style(sk, UDP) && |
1763 | !sctp_state(asoc, ESTABLISHED)) | |
1764 | return 0; | |
1765 | ||
c2666de1 XL |
1766 | if (sflags & SCTP_EOF) { |
1767 | pr_debug("%s: shutting down association:%p\n", __func__, asoc); | |
1768 | sctp_primitive_SHUTDOWN(net, asoc, NULL); | |
1769 | ||
1770 | return 0; | |
1771 | } | |
1772 | ||
1773 | if (sflags & SCTP_ABORT) { | |
1774 | struct sctp_chunk *chunk; | |
1775 | ||
1776 | chunk = sctp_make_abort_user(asoc, msg, msg_len); | |
1777 | if (!chunk) | |
1778 | return -ENOMEM; | |
1779 | ||
1780 | pr_debug("%s: aborting association:%p\n", __func__, asoc); | |
1781 | sctp_primitive_ABORT(net, asoc, chunk); | |
901efe12 | 1782 | iov_iter_revert(&msg->msg_iter, msg_len); |
c2666de1 XL |
1783 | |
1784 | return 0; | |
1785 | } | |
1786 | ||
1787 | return 1; | |
1788 | } | |
1789 | ||
f84af331 XL |
1790 | static int sctp_sendmsg_to_asoc(struct sctp_association *asoc, |
1791 | struct msghdr *msg, size_t msg_len, | |
1792 | struct sctp_transport *transport, | |
1793 | struct sctp_sndrcvinfo *sinfo) | |
1794 | { | |
1795 | struct sock *sk = asoc->base.sk; | |
63d01330 | 1796 | struct sctp_sock *sp = sctp_sk(sk); |
f84af331 XL |
1797 | struct net *net = sock_net(sk); |
1798 | struct sctp_datamsg *datamsg; | |
1799 | bool wait_connect = false; | |
1800 | struct sctp_chunk *chunk; | |
1801 | long timeo; | |
1802 | int err; | |
1803 | ||
1804 | if (sinfo->sinfo_stream >= asoc->stream.outcnt) { | |
1805 | err = -EINVAL; | |
1806 | goto err; | |
1807 | } | |
1808 | ||
05364ca0 | 1809 | if (unlikely(!SCTP_SO(&asoc->stream, sinfo->sinfo_stream)->ext)) { |
f84af331 XL |
1810 | err = sctp_stream_init_ext(&asoc->stream, sinfo->sinfo_stream); |
1811 | if (err) | |
1812 | goto err; | |
1813 | } | |
1814 | ||
63d01330 | 1815 | if (sp->disable_fragments && msg_len > asoc->frag_point) { |
f84af331 XL |
1816 | err = -EMSGSIZE; |
1817 | goto err; | |
1818 | } | |
1819 | ||
2521680e | 1820 | if (asoc->pmtu_pending) { |
63d01330 MRL |
1821 | if (sp->param_flags & SPP_PMTUD_ENABLE) |
1822 | sctp_assoc_sync_pmtu(asoc); | |
2521680e MRL |
1823 | asoc->pmtu_pending = 0; |
1824 | } | |
0aee4c25 | 1825 | |
cd305c74 | 1826 | if (sctp_wspace(asoc) < (int)msg_len) |
0aee4c25 NH |
1827 | sctp_prsctp_prune(asoc, sinfo, msg_len - sctp_wspace(asoc)); |
1828 | ||
1033990a | 1829 | if (sctp_wspace(asoc) <= 0 || !sk_wmem_schedule(sk, msg_len)) { |
0aee4c25 NH |
1830 | timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT); |
1831 | err = sctp_wait_for_sndbuf(asoc, &timeo, msg_len); | |
1832 | if (err) | |
1833 | goto err; | |
2584024b XL |
1834 | if (unlikely(sinfo->sinfo_stream >= asoc->stream.outcnt)) { |
1835 | err = -EINVAL; | |
1836 | goto err; | |
1837 | } | |
0aee4c25 NH |
1838 | } |
1839 | ||
f84af331 XL |
1840 | if (sctp_state(asoc, CLOSED)) { |
1841 | err = sctp_primitive_ASSOCIATE(net, asoc, NULL); | |
1842 | if (err) | |
1843 | goto err; | |
1844 | ||
e55f4b8b | 1845 | if (asoc->ep->intl_enable) { |
f84af331 XL |
1846 | timeo = sock_sndtimeo(sk, 0); |
1847 | err = sctp_wait_for_connect(asoc, &timeo); | |
c863850c XL |
1848 | if (err) { |
1849 | err = -ESRCH; | |
f84af331 | 1850 | goto err; |
c863850c | 1851 | } |
f84af331 XL |
1852 | } else { |
1853 | wait_connect = true; | |
1854 | } | |
1855 | ||
1856 | pr_debug("%s: we associated primitively\n", __func__); | |
1857 | } | |
1858 | ||
f84af331 XL |
1859 | datamsg = sctp_datamsg_from_user(asoc, sinfo, &msg->msg_iter); |
1860 | if (IS_ERR(datamsg)) { | |
1861 | err = PTR_ERR(datamsg); | |
1862 | goto err; | |
1863 | } | |
1864 | ||
1865 | asoc->force_delay = !!(msg->msg_flags & MSG_MORE); | |
1866 | ||
1867 | list_for_each_entry(chunk, &datamsg->chunks, frag_list) { | |
1868 | sctp_chunk_hold(chunk); | |
1869 | sctp_set_owner_w(chunk); | |
1870 | chunk->transport = transport; | |
1871 | } | |
1872 | ||
1873 | err = sctp_primitive_SEND(net, asoc, datamsg); | |
1874 | if (err) { | |
1875 | sctp_datamsg_free(datamsg); | |
1876 | goto err; | |
1877 | } | |
1878 | ||
1879 | pr_debug("%s: we sent primitively\n", __func__); | |
1880 | ||
1881 | sctp_datamsg_put(datamsg); | |
1882 | ||
1883 | if (unlikely(wait_connect)) { | |
1884 | timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT); | |
1885 | sctp_wait_for_connect(asoc, &timeo); | |
1886 | } | |
1887 | ||
1888 | err = msg_len; | |
1889 | ||
1890 | err: | |
1891 | return err; | |
1892 | } | |
1893 | ||
becef9b1 XL |
1894 | static union sctp_addr *sctp_sendmsg_get_daddr(struct sock *sk, |
1895 | const struct msghdr *msg, | |
1896 | struct sctp_cmsgs *cmsgs) | |
1897 | { | |
1898 | union sctp_addr *daddr = NULL; | |
1899 | int err; | |
1900 | ||
1901 | if (!sctp_style(sk, UDP_HIGH_BANDWIDTH) && msg->msg_name) { | |
1902 | int len = msg->msg_namelen; | |
1903 | ||
1904 | if (len > sizeof(*daddr)) | |
1905 | len = sizeof(*daddr); | |
1906 | ||
1907 | daddr = (union sctp_addr *)msg->msg_name; | |
1908 | ||
1909 | err = sctp_verify_addr(sk, daddr, len); | |
1910 | if (err) | |
1911 | return ERR_PTR(err); | |
1912 | } | |
1913 | ||
1914 | return daddr; | |
1915 | } | |
1916 | ||
d42cb06e XL |
1917 | static void sctp_sendmsg_update_sinfo(struct sctp_association *asoc, |
1918 | struct sctp_sndrcvinfo *sinfo, | |
1919 | struct sctp_cmsgs *cmsgs) | |
1920 | { | |
1921 | if (!cmsgs->srinfo && !cmsgs->sinfo) { | |
1922 | sinfo->sinfo_stream = asoc->default_stream; | |
1923 | sinfo->sinfo_ppid = asoc->default_ppid; | |
1924 | sinfo->sinfo_context = asoc->default_context; | |
1925 | sinfo->sinfo_assoc_id = sctp_assoc2id(asoc); | |
ed63afb8 XL |
1926 | |
1927 | if (!cmsgs->prinfo) | |
1928 | sinfo->sinfo_flags = asoc->default_flags; | |
d42cb06e XL |
1929 | } |
1930 | ||
ed63afb8 | 1931 | if (!cmsgs->srinfo && !cmsgs->prinfo) |
d42cb06e | 1932 | sinfo->sinfo_timetolive = asoc->default_timetolive; |
3ff547c0 XL |
1933 | |
1934 | if (cmsgs->authinfo) { | |
1935 | /* Reuse sinfo_tsn to indicate that authinfo was set and | |
1936 | * sinfo_ssn to save the keyid on tx path. | |
1937 | */ | |
1938 | sinfo->sinfo_tsn = 1; | |
1939 | sinfo->sinfo_ssn = cmsgs->authinfo->auth_keynumber; | |
1940 | } | |
d42cb06e XL |
1941 | } |
1942 | ||
1b784140 | 1943 | static int sctp_sendmsg(struct sock *sk, struct msghdr *msg, size_t msg_len) |
1da177e4 | 1944 | { |
204f817f | 1945 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
8e87c6eb | 1946 | struct sctp_transport *transport = NULL; |
204f817f | 1947 | struct sctp_sndrcvinfo _sinfo, *sinfo; |
ba59fb02 | 1948 | struct sctp_association *asoc, *tmp; |
007b7e18 | 1949 | struct sctp_cmsgs cmsgs; |
becef9b1 | 1950 | union sctp_addr *daddr; |
007b7e18 XL |
1951 | bool new = false; |
1952 | __u16 sflags; | |
63b94938 | 1953 | int err; |
1da177e4 | 1954 | |
204f817f XL |
1955 | /* Parse and get snd_info */ |
1956 | err = sctp_sendmsg_parse(sk, &cmsgs, &_sinfo, msg, msg_len); | |
1957 | if (err) | |
007b7e18 | 1958 | goto out; |
1da177e4 | 1959 | |
204f817f | 1960 | sinfo = &_sinfo; |
007b7e18 | 1961 | sflags = sinfo->sinfo_flags; |
1da177e4 | 1962 | |
becef9b1 XL |
1963 | /* Get daddr from msg */ |
1964 | daddr = sctp_sendmsg_get_daddr(sk, msg, &cmsgs); | |
1965 | if (IS_ERR(daddr)) { | |
1966 | err = PTR_ERR(daddr); | |
007b7e18 | 1967 | goto out; |
1da177e4 LT |
1968 | } |
1969 | ||
048ed4b6 | 1970 | lock_sock(sk); |
1da177e4 | 1971 | |
49102805 XL |
1972 | /* SCTP_SENDALL process */ |
1973 | if ((sflags & SCTP_SENDALL) && sctp_style(sk, UDP)) { | |
ba59fb02 | 1974 | list_for_each_entry_safe(asoc, tmp, &ep->asocs, asocs) { |
49102805 XL |
1975 | err = sctp_sendmsg_check_sflags(asoc, sflags, msg, |
1976 | msg_len); | |
1977 | if (err == 0) | |
1978 | continue; | |
1979 | if (err < 0) | |
1980 | goto out_unlock; | |
1981 | ||
1982 | sctp_sendmsg_update_sinfo(asoc, sinfo, &cmsgs); | |
1983 | ||
1984 | err = sctp_sendmsg_to_asoc(asoc, msg, msg_len, | |
1985 | NULL, sinfo); | |
1986 | if (err < 0) | |
1987 | goto out_unlock; | |
1988 | ||
1989 | iov_iter_revert(&msg->msg_iter, err); | |
1990 | } | |
1991 | ||
1992 | goto out_unlock; | |
1993 | } | |
1994 | ||
0a3920d2 | 1995 | /* Get and check or create asoc */ |
becef9b1 | 1996 | if (daddr) { |
becef9b1 | 1997 | asoc = sctp_endpoint_lookup_assoc(ep, daddr, &transport); |
0a3920d2 XL |
1998 | if (asoc) { |
1999 | err = sctp_sendmsg_check_sflags(asoc, sflags, msg, | |
2000 | msg_len); | |
2001 | if (err <= 0) | |
2002 | goto out_unlock; | |
2003 | } else { | |
2004 | err = sctp_sendmsg_new_asoc(sk, sflags, &cmsgs, daddr, | |
2005 | &transport); | |
2006 | if (err) | |
2007 | goto out_unlock; | |
2008 | ||
2009 | asoc = transport->asoc; | |
2010 | new = true; | |
2011 | } | |
2012 | ||
2013 | if (!sctp_style(sk, TCP) && !(sflags & SCTP_ADDR_OVER)) | |
2014 | transport = NULL; | |
1da177e4 | 2015 | } else { |
007b7e18 | 2016 | asoc = sctp_id2assoc(sk, sinfo->sinfo_assoc_id); |
1da177e4 LT |
2017 | if (!asoc) { |
2018 | err = -EPIPE; | |
2019 | goto out_unlock; | |
2020 | } | |
1da177e4 | 2021 | |
007b7e18 | 2022 | err = sctp_sendmsg_check_sflags(asoc, sflags, msg, msg_len); |
c2666de1 | 2023 | if (err <= 0) |
1da177e4 | 2024 | goto out_unlock; |
1da177e4 LT |
2025 | } |
2026 | ||
d42cb06e XL |
2027 | /* Update snd_info with the asoc */ |
2028 | sctp_sendmsg_update_sinfo(asoc, sinfo, &cmsgs); | |
1da177e4 | 2029 | |
f84af331 | 2030 | /* Send msg to the asoc */ |
8e87c6eb | 2031 | err = sctp_sendmsg_to_asoc(asoc, msg, msg_len, transport, sinfo); |
007b7e18 | 2032 | if (err < 0 && err != -ESRCH && new) |
1da177e4 | 2033 | sctp_association_free(asoc); |
8e87c6eb | 2034 | |
1da177e4 | 2035 | out_unlock: |
048ed4b6 | 2036 | release_sock(sk); |
007b7e18 | 2037 | out: |
f84af331 | 2038 | return sctp_error(sk, msg->msg_flags, err); |
1da177e4 LT |
2039 | } |
2040 | ||
2041 | /* This is an extended version of skb_pull() that removes the data from the | |
2042 | * start of a skb even when data is spread across the list of skb's in the | |
2043 | * frag_list. len specifies the total amount of data that needs to be removed. | |
2044 | * when 'len' bytes could be removed from the skb, it returns 0. | |
2045 | * If 'len' exceeds the total skb length, it returns the no. of bytes that | |
2046 | * could not be removed. | |
2047 | */ | |
2048 | static int sctp_skb_pull(struct sk_buff *skb, int len) | |
2049 | { | |
2050 | struct sk_buff *list; | |
2051 | int skb_len = skb_headlen(skb); | |
2052 | int rlen; | |
2053 | ||
2054 | if (len <= skb_len) { | |
2055 | __skb_pull(skb, len); | |
2056 | return 0; | |
2057 | } | |
2058 | len -= skb_len; | |
2059 | __skb_pull(skb, skb_len); | |
2060 | ||
1b003be3 | 2061 | skb_walk_frags(skb, list) { |
1da177e4 LT |
2062 | rlen = sctp_skb_pull(list, len); |
2063 | skb->len -= (len-rlen); | |
2064 | skb->data_len -= (len-rlen); | |
2065 | ||
2066 | if (!rlen) | |
2067 | return 0; | |
2068 | ||
2069 | len = rlen; | |
2070 | } | |
2071 | ||
2072 | return len; | |
2073 | } | |
2074 | ||
2075 | /* API 3.1.3 recvmsg() - UDP Style Syntax | |
2076 | * | |
2077 | * ssize_t recvmsg(int socket, struct msghdr *message, | |
2078 | * int flags); | |
2079 | * | |
2080 | * socket - the socket descriptor of the endpoint. | |
2081 | * message - pointer to the msghdr structure which contains a single | |
2082 | * user message and possibly some ancillary data. | |
2083 | * | |
2084 | * See Section 5 for complete description of the data | |
2085 | * structures. | |
2086 | * | |
2087 | * flags - flags sent or received with the user message, see Section | |
2088 | * 5 for complete description of the flags. | |
2089 | */ | |
1b784140 | 2090 | static int sctp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, |
ec095263 | 2091 | int flags, int *addr_len) |
1da177e4 LT |
2092 | { |
2093 | struct sctp_ulpevent *event = NULL; | |
2094 | struct sctp_sock *sp = sctp_sk(sk); | |
1f45f78f | 2095 | struct sk_buff *skb, *head_skb; |
1da177e4 LT |
2096 | int copied; |
2097 | int err = 0; | |
2098 | int skb_len; | |
2099 | ||
ec095263 OH |
2100 | pr_debug("%s: sk:%p, msghdr:%p, len:%zd, flags:0x%x, addr_len:%p)\n", |
2101 | __func__, sk, msg, len, flags, addr_len); | |
1da177e4 | 2102 | |
4746b36b ED |
2103 | if (unlikely(flags & MSG_ERRQUEUE)) |
2104 | return inet_recv_error(sk, msg, len, addr_len); | |
2105 | ||
a562c0a2 ED |
2106 | if (sk_can_busy_loop(sk) && |
2107 | skb_queue_empty_lockless(&sk->sk_receive_queue)) | |
2108 | sk_busy_loop(sk, flags & MSG_DONTWAIT); | |
2109 | ||
048ed4b6 | 2110 | lock_sock(sk); |
1da177e4 | 2111 | |
e5b13f34 | 2112 | if (sctp_style(sk, TCP) && !sctp_sstate(sk, ESTABLISHED) && |
e0878694 | 2113 | !sctp_sstate(sk, CLOSING) && !sctp_sstate(sk, CLOSED)) { |
1da177e4 LT |
2114 | err = -ENOTCONN; |
2115 | goto out; | |
2116 | } | |
2117 | ||
ec095263 | 2118 | skb = sctp_skb_recv_datagram(sk, flags, &err); |
1da177e4 LT |
2119 | if (!skb) |
2120 | goto out; | |
2121 | ||
2122 | /* Get the total length of the skb including any skb's in the | |
2123 | * frag_list. | |
2124 | */ | |
2125 | skb_len = skb->len; | |
2126 | ||
2127 | copied = skb_len; | |
2128 | if (copied > len) | |
2129 | copied = len; | |
2130 | ||
51f3d02b | 2131 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
1da177e4 LT |
2132 | |
2133 | event = sctp_skb2event(skb); | |
2134 | ||
2135 | if (err) | |
2136 | goto out_free; | |
2137 | ||
1f45f78f MRL |
2138 | if (event->chunk && event->chunk->head_skb) |
2139 | head_skb = event->chunk->head_skb; | |
2140 | else | |
2141 | head_skb = skb; | |
6fd1d51c | 2142 | sock_recv_cmsgs(msg, sk, head_skb); |
1da177e4 LT |
2143 | if (sctp_ulpevent_is_notification(event)) { |
2144 | msg->msg_flags |= MSG_NOTIFICATION; | |
2145 | sp->pf->event_msgname(event, msg->msg_name, addr_len); | |
2146 | } else { | |
1f45f78f | 2147 | sp->pf->skb_msgname(head_skb, msg->msg_name, addr_len); |
1da177e4 LT |
2148 | } |
2149 | ||
2347c80f GOV |
2150 | /* Check if we allow SCTP_NXTINFO. */ |
2151 | if (sp->recvnxtinfo) | |
2152 | sctp_ulpevent_read_nxtinfo(event, msg, sk); | |
0d3a421d GOV |
2153 | /* Check if we allow SCTP_RCVINFO. */ |
2154 | if (sp->recvrcvinfo) | |
2155 | sctp_ulpevent_read_rcvinfo(event, msg); | |
1da177e4 | 2156 | /* Check if we allow SCTP_SNDRCVINFO. */ |
2cc0eeb6 | 2157 | if (sctp_ulpevent_type_enabled(sp->subscribe, SCTP_DATA_IO_EVENT)) |
1da177e4 | 2158 | sctp_ulpevent_read_sndrcvinfo(event, msg); |
0d3a421d | 2159 | |
1da177e4 LT |
2160 | err = copied; |
2161 | ||
2162 | /* If skb's length exceeds the user's buffer, update the skb and | |
2163 | * push it back to the receive_queue so that the next call to | |
2164 | * recvmsg() will return the remaining data. Don't set MSG_EOR. | |
2165 | */ | |
2166 | if (skb_len > copied) { | |
2167 | msg->msg_flags &= ~MSG_EOR; | |
2168 | if (flags & MSG_PEEK) | |
2169 | goto out_free; | |
2170 | sctp_skb_pull(skb, copied); | |
2171 | skb_queue_head(&sk->sk_receive_queue, skb); | |
2172 | ||
362d5204 DB |
2173 | /* When only partial message is copied to the user, increase |
2174 | * rwnd by that amount. If all the data in the skb is read, | |
2175 | * rwnd is updated when the event is freed. | |
2176 | */ | |
2177 | if (!sctp_ulpevent_is_notification(event)) | |
2178 | sctp_assoc_rwnd_increase(event->asoc, copied); | |
1da177e4 LT |
2179 | goto out; |
2180 | } else if ((event->msg_flags & MSG_NOTIFICATION) || | |
2181 | (event->msg_flags & MSG_EOR)) | |
2182 | msg->msg_flags |= MSG_EOR; | |
2183 | else | |
2184 | msg->msg_flags &= ~MSG_EOR; | |
2185 | ||
2186 | out_free: | |
2187 | if (flags & MSG_PEEK) { | |
2188 | /* Release the skb reference acquired after peeking the skb in | |
2189 | * sctp_skb_recv_datagram(). | |
2190 | */ | |
2191 | kfree_skb(skb); | |
2192 | } else { | |
2193 | /* Free the event which includes releasing the reference to | |
2194 | * the owner of the skb, freeing the skb and updating the | |
2195 | * rwnd. | |
2196 | */ | |
2197 | sctp_ulpevent_free(event); | |
2198 | } | |
2199 | out: | |
048ed4b6 | 2200 | release_sock(sk); |
1da177e4 LT |
2201 | return err; |
2202 | } | |
2203 | ||
2204 | /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS) | |
2205 | * | |
2206 | * This option is a on/off flag. If enabled no SCTP message | |
2207 | * fragmentation will be performed. Instead if a message being sent | |
2208 | * exceeds the current PMTU size, the message will NOT be sent and | |
2209 | * instead a error will be indicated to the user. | |
2210 | */ | |
10835825 | 2211 | static int sctp_setsockopt_disable_fragments(struct sock *sk, int *val, |
b7058842 | 2212 | unsigned int optlen) |
1da177e4 | 2213 | { |
1da177e4 LT |
2214 | if (optlen < sizeof(int)) |
2215 | return -EINVAL; | |
10835825 | 2216 | sctp_sk(sk)->disable_fragments = (*val == 0) ? 0 : 1; |
1da177e4 LT |
2217 | return 0; |
2218 | } | |
2219 | ||
a98d21a1 | 2220 | static int sctp_setsockopt_events(struct sock *sk, __u8 *sn_type, |
b7058842 | 2221 | unsigned int optlen) |
1da177e4 | 2222 | { |
2cc0eeb6 | 2223 | struct sctp_sock *sp = sctp_sk(sk); |
a1e3a059 | 2224 | struct sctp_association *asoc; |
2cc0eeb6 | 2225 | int i; |
94912301 | 2226 | |
7e8616d8 | 2227 | if (optlen > sizeof(struct sctp_event_subscribe)) |
1da177e4 | 2228 | return -EINVAL; |
2cc0eeb6 | 2229 | |
2cc0eeb6 XL |
2230 | for (i = 0; i < optlen; i++) |
2231 | sctp_ulpevent_type_set(&sp->subscribe, SCTP_SN_TYPE_BASE + i, | |
2232 | sn_type[i]); | |
2233 | ||
a1e3a059 XL |
2234 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) |
2235 | asoc->subscribe = sctp_sk(sk)->subscribe; | |
2236 | ||
bbbea41d | 2237 | /* At the time when a user app subscribes to SCTP_SENDER_DRY_EVENT, |
94912301 WY |
2238 | * if there is no data to be sent or retransmit, the stack will |
2239 | * immediately send up this notification. | |
2240 | */ | |
2cc0eeb6 | 2241 | if (sctp_ulpevent_type_enabled(sp->subscribe, SCTP_SENDER_DRY_EVENT)) { |
2cc0eeb6 | 2242 | struct sctp_ulpevent *event; |
94912301 | 2243 | |
a1e3a059 | 2244 | asoc = sctp_id2assoc(sk, 0); |
94912301 WY |
2245 | if (asoc && sctp_outq_is_empty(&asoc->outqueue)) { |
2246 | event = sctp_ulpevent_make_sender_dry_event(asoc, | |
2e83acb9 | 2247 | GFP_USER | __GFP_NOWARN); |
94912301 WY |
2248 | if (!event) |
2249 | return -ENOMEM; | |
2250 | ||
9162e0ed | 2251 | asoc->stream.si->enqueue_event(&asoc->ulpq, event); |
94912301 WY |
2252 | } |
2253 | } | |
2254 | ||
1da177e4 LT |
2255 | return 0; |
2256 | } | |
2257 | ||
2258 | /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE) | |
2259 | * | |
2260 | * This socket option is applicable to the UDP-style socket only. When | |
2261 | * set it will cause associations that are idle for more than the | |
2262 | * specified number of seconds to automatically close. An association | |
2263 | * being idle is defined an association that has NOT sent or received | |
2264 | * user data. The special value of '0' indicates that no automatic | |
2265 | * close of any associations should be performed. The option expects an | |
2266 | * integer defining the number of seconds of idle time before an | |
2267 | * association is closed. | |
2268 | */ | |
0b49a65c | 2269 | static int sctp_setsockopt_autoclose(struct sock *sk, u32 *optval, |
b7058842 | 2270 | unsigned int optlen) |
1da177e4 LT |
2271 | { |
2272 | struct sctp_sock *sp = sctp_sk(sk); | |
9f70f46b | 2273 | struct net *net = sock_net(sk); |
1da177e4 LT |
2274 | |
2275 | /* Applicable to UDP-style socket only */ | |
2276 | if (sctp_style(sk, TCP)) | |
2277 | return -EOPNOTSUPP; | |
2278 | if (optlen != sizeof(int)) | |
2279 | return -EINVAL; | |
1da177e4 | 2280 | |
0b49a65c | 2281 | sp->autoclose = *optval; |
9f70f46b NH |
2282 | if (sp->autoclose > net->sctp.max_autoclose) |
2283 | sp->autoclose = net->sctp.max_autoclose; | |
2284 | ||
1da177e4 LT |
2285 | return 0; |
2286 | } | |
2287 | ||
2288 | /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS) | |
2289 | * | |
2290 | * Applications can enable or disable heartbeats for any peer address of | |
2291 | * an association, modify an address's heartbeat interval, force a | |
2292 | * heartbeat to be sent immediately, and adjust the address's maximum | |
2293 | * number of retransmissions sent before an address is considered | |
2294 | * unreachable. The following structure is used to access and modify an | |
2295 | * address's parameters: | |
2296 | * | |
2297 | * struct sctp_paddrparams { | |
52ccb8e9 FF |
2298 | * sctp_assoc_t spp_assoc_id; |
2299 | * struct sockaddr_storage spp_address; | |
2300 | * uint32_t spp_hbinterval; | |
2301 | * uint16_t spp_pathmaxrxt; | |
2302 | * uint32_t spp_pathmtu; | |
2303 | * uint32_t spp_sackdelay; | |
2304 | * uint32_t spp_flags; | |
0b0dce7a XL |
2305 | * uint32_t spp_ipv6_flowlabel; |
2306 | * uint8_t spp_dscp; | |
52ccb8e9 FF |
2307 | * }; |
2308 | * | |
2309 | * spp_assoc_id - (one-to-many style socket) This is filled in the | |
2310 | * application, and identifies the association for | |
2311 | * this query. | |
1da177e4 LT |
2312 | * spp_address - This specifies which address is of interest. |
2313 | * spp_hbinterval - This contains the value of the heartbeat interval, | |
52ccb8e9 FF |
2314 | * in milliseconds. If a value of zero |
2315 | * is present in this field then no changes are to | |
2316 | * be made to this parameter. | |
1da177e4 LT |
2317 | * spp_pathmaxrxt - This contains the maximum number of |
2318 | * retransmissions before this address shall be | |
52ccb8e9 FF |
2319 | * considered unreachable. If a value of zero |
2320 | * is present in this field then no changes are to | |
2321 | * be made to this parameter. | |
2322 | * spp_pathmtu - When Path MTU discovery is disabled the value | |
2323 | * specified here will be the "fixed" path mtu. | |
2324 | * Note that if the spp_address field is empty | |
2325 | * then all associations on this address will | |
2326 | * have this fixed path mtu set upon them. | |
2327 | * | |
2328 | * spp_sackdelay - When delayed sack is enabled, this value specifies | |
2329 | * the number of milliseconds that sacks will be delayed | |
2330 | * for. This value will apply to all addresses of an | |
2331 | * association if the spp_address field is empty. Note | |
2332 | * also, that if delayed sack is enabled and this | |
2333 | * value is set to 0, no change is made to the last | |
2334 | * recorded delayed sack timer value. | |
2335 | * | |
2336 | * spp_flags - These flags are used to control various features | |
2337 | * on an association. The flag field may contain | |
2338 | * zero or more of the following options. | |
2339 | * | |
2340 | * SPP_HB_ENABLE - Enable heartbeats on the | |
2341 | * specified address. Note that if the address | |
2342 | * field is empty all addresses for the association | |
2343 | * have heartbeats enabled upon them. | |
2344 | * | |
2345 | * SPP_HB_DISABLE - Disable heartbeats on the | |
2346 | * speicifed address. Note that if the address | |
2347 | * field is empty all addresses for the association | |
2348 | * will have their heartbeats disabled. Note also | |
2349 | * that SPP_HB_ENABLE and SPP_HB_DISABLE are | |
2350 | * mutually exclusive, only one of these two should | |
2351 | * be specified. Enabling both fields will have | |
2352 | * undetermined results. | |
2353 | * | |
2354 | * SPP_HB_DEMAND - Request a user initiated heartbeat | |
2355 | * to be made immediately. | |
2356 | * | |
bdf3092a VY |
2357 | * SPP_HB_TIME_IS_ZERO - Specify's that the time for |
2358 | * heartbeat delayis to be set to the value of 0 | |
2359 | * milliseconds. | |
2360 | * | |
52ccb8e9 FF |
2361 | * SPP_PMTUD_ENABLE - This field will enable PMTU |
2362 | * discovery upon the specified address. Note that | |
2363 | * if the address feild is empty then all addresses | |
2364 | * on the association are effected. | |
2365 | * | |
2366 | * SPP_PMTUD_DISABLE - This field will disable PMTU | |
2367 | * discovery upon the specified address. Note that | |
2368 | * if the address feild is empty then all addresses | |
2369 | * on the association are effected. Not also that | |
2370 | * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually | |
2371 | * exclusive. Enabling both will have undetermined | |
2372 | * results. | |
2373 | * | |
2374 | * SPP_SACKDELAY_ENABLE - Setting this flag turns | |
2375 | * on delayed sack. The time specified in spp_sackdelay | |
2376 | * is used to specify the sack delay for this address. Note | |
2377 | * that if spp_address is empty then all addresses will | |
2378 | * enable delayed sack and take on the sack delay | |
2379 | * value specified in spp_sackdelay. | |
2380 | * SPP_SACKDELAY_DISABLE - Setting this flag turns | |
2381 | * off delayed sack. If the spp_address field is blank then | |
2382 | * delayed sack is disabled for the entire association. Note | |
2383 | * also that this field is mutually exclusive to | |
2384 | * SPP_SACKDELAY_ENABLE, setting both will have undefined | |
2385 | * results. | |
0b0dce7a XL |
2386 | * |
2387 | * SPP_IPV6_FLOWLABEL: Setting this flag enables the | |
2388 | * setting of the IPV6 flow label value. The value is | |
2389 | * contained in the spp_ipv6_flowlabel field. | |
2390 | * Upon retrieval, this flag will be set to indicate that | |
2391 | * the spp_ipv6_flowlabel field has a valid value returned. | |
2392 | * If a specific destination address is set (in the | |
2393 | * spp_address field), then the value returned is that of | |
2394 | * the address. If just an association is specified (and | |
2395 | * no address), then the association's default flow label | |
2396 | * is returned. If neither an association nor a destination | |
2397 | * is specified, then the socket's default flow label is | |
2398 | * returned. For non-IPv6 sockets, this flag will be left | |
2399 | * cleared. | |
2400 | * | |
2401 | * SPP_DSCP: Setting this flag enables the setting of the | |
2402 | * Differentiated Services Code Point (DSCP) value | |
2403 | * associated with either the association or a specific | |
2404 | * address. The value is obtained in the spp_dscp field. | |
2405 | * Upon retrieval, this flag will be set to indicate that | |
2406 | * the spp_dscp field has a valid value returned. If a | |
2407 | * specific destination address is set when called (in the | |
2408 | * spp_address field), then that specific destination | |
2409 | * address's DSCP value is returned. If just an association | |
2410 | * is specified, then the association's default DSCP is | |
2411 | * returned. If neither an association nor a destination is | |
2412 | * specified, then the socket's default DSCP is returned. | |
2413 | * | |
2414 | * spp_ipv6_flowlabel | |
2415 | * - This field is used in conjunction with the | |
2416 | * SPP_IPV6_FLOWLABEL flag and contains the IPv6 flow label. | |
2417 | * The 20 least significant bits are used for the flow | |
2418 | * label. This setting has precedence over any IPv6-layer | |
2419 | * setting. | |
2420 | * | |
2421 | * spp_dscp - This field is used in conjunction with the SPP_DSCP flag | |
2422 | * and contains the DSCP. The 6 most significant bits are | |
2423 | * used for the DSCP. This setting has precedence over any | |
2424 | * IPv4- or IPv6- layer setting. | |
1da177e4 | 2425 | */ |
16164366 AB |
2426 | static int sctp_apply_peer_addr_params(struct sctp_paddrparams *params, |
2427 | struct sctp_transport *trans, | |
2428 | struct sctp_association *asoc, | |
2429 | struct sctp_sock *sp, | |
2430 | int hb_change, | |
2431 | int pmtud_change, | |
2432 | int sackdelay_change) | |
52ccb8e9 FF |
2433 | { |
2434 | int error; | |
2435 | ||
2436 | if (params->spp_flags & SPP_HB_DEMAND && trans) { | |
4e7696d9 XL |
2437 | error = sctp_primitive_REQUESTHEARTBEAT(trans->asoc->base.net, |
2438 | trans->asoc, trans); | |
52ccb8e9 FF |
2439 | if (error) |
2440 | return error; | |
2441 | } | |
2442 | ||
bdf3092a VY |
2443 | /* Note that unless the spp_flag is set to SPP_HB_ENABLE the value of |
2444 | * this field is ignored. Note also that a value of zero indicates | |
2445 | * the current setting should be left unchanged. | |
2446 | */ | |
2447 | if (params->spp_flags & SPP_HB_ENABLE) { | |
2448 | ||
2449 | /* Re-zero the interval if the SPP_HB_TIME_IS_ZERO is | |
2450 | * set. This lets us use 0 value when this flag | |
2451 | * is set. | |
2452 | */ | |
2453 | if (params->spp_flags & SPP_HB_TIME_IS_ZERO) | |
2454 | params->spp_hbinterval = 0; | |
2455 | ||
2456 | if (params->spp_hbinterval || | |
2457 | (params->spp_flags & SPP_HB_TIME_IS_ZERO)) { | |
2458 | if (trans) { | |
2459 | trans->hbinterval = | |
2460 | msecs_to_jiffies(params->spp_hbinterval); | |
1f4e803c | 2461 | sctp_transport_reset_hb_timer(trans); |
bdf3092a VY |
2462 | } else if (asoc) { |
2463 | asoc->hbinterval = | |
2464 | msecs_to_jiffies(params->spp_hbinterval); | |
2465 | } else { | |
2466 | sp->hbinterval = params->spp_hbinterval; | |
2467 | } | |
52ccb8e9 FF |
2468 | } |
2469 | } | |
2470 | ||
2471 | if (hb_change) { | |
2472 | if (trans) { | |
2473 | trans->param_flags = | |
2474 | (trans->param_flags & ~SPP_HB) | hb_change; | |
2475 | } else if (asoc) { | |
2476 | asoc->param_flags = | |
2477 | (asoc->param_flags & ~SPP_HB) | hb_change; | |
2478 | } else { | |
2479 | sp->param_flags = | |
2480 | (sp->param_flags & ~SPP_HB) | hb_change; | |
2481 | } | |
2482 | } | |
2483 | ||
bdf3092a VY |
2484 | /* When Path MTU discovery is disabled the value specified here will |
2485 | * be the "fixed" path mtu (i.e. the value of the spp_flags field must | |
2486 | * include the flag SPP_PMTUD_DISABLE for this field to have any | |
2487 | * effect). | |
2488 | */ | |
2489 | if ((params->spp_flags & SPP_PMTUD_DISABLE) && params->spp_pathmtu) { | |
52ccb8e9 FF |
2490 | if (trans) { |
2491 | trans->pathmtu = params->spp_pathmtu; | |
3ebfdf08 | 2492 | sctp_assoc_sync_pmtu(asoc); |
52ccb8e9 | 2493 | } else if (asoc) { |
c4b2893d | 2494 | sctp_assoc_set_pmtu(asoc, params->spp_pathmtu); |
52ccb8e9 FF |
2495 | } else { |
2496 | sp->pathmtu = params->spp_pathmtu; | |
2497 | } | |
2498 | } | |
2499 | ||
2500 | if (pmtud_change) { | |
2501 | if (trans) { | |
2502 | int update = (trans->param_flags & SPP_PMTUD_DISABLE) && | |
2503 | (params->spp_flags & SPP_PMTUD_ENABLE); | |
2504 | trans->param_flags = | |
2505 | (trans->param_flags & ~SPP_PMTUD) | pmtud_change; | |
2506 | if (update) { | |
9914ae3c | 2507 | sctp_transport_pmtu(trans, sctp_opt2sk(sp)); |
3ebfdf08 | 2508 | sctp_assoc_sync_pmtu(asoc); |
52ccb8e9 | 2509 | } |
7307e4fa | 2510 | sctp_transport_pl_reset(trans); |
52ccb8e9 FF |
2511 | } else if (asoc) { |
2512 | asoc->param_flags = | |
2513 | (asoc->param_flags & ~SPP_PMTUD) | pmtud_change; | |
2514 | } else { | |
2515 | sp->param_flags = | |
2516 | (sp->param_flags & ~SPP_PMTUD) | pmtud_change; | |
2517 | } | |
2518 | } | |
2519 | ||
bdf3092a VY |
2520 | /* Note that unless the spp_flag is set to SPP_SACKDELAY_ENABLE the |
2521 | * value of this field is ignored. Note also that a value of zero | |
2522 | * indicates the current setting should be left unchanged. | |
2523 | */ | |
2524 | if ((params->spp_flags & SPP_SACKDELAY_ENABLE) && params->spp_sackdelay) { | |
52ccb8e9 FF |
2525 | if (trans) { |
2526 | trans->sackdelay = | |
2527 | msecs_to_jiffies(params->spp_sackdelay); | |
2528 | } else if (asoc) { | |
2529 | asoc->sackdelay = | |
2530 | msecs_to_jiffies(params->spp_sackdelay); | |
2531 | } else { | |
2532 | sp->sackdelay = params->spp_sackdelay; | |
2533 | } | |
2534 | } | |
2535 | ||
2536 | if (sackdelay_change) { | |
2537 | if (trans) { | |
2538 | trans->param_flags = | |
2539 | (trans->param_flags & ~SPP_SACKDELAY) | | |
2540 | sackdelay_change; | |
2541 | } else if (asoc) { | |
2542 | asoc->param_flags = | |
2543 | (asoc->param_flags & ~SPP_SACKDELAY) | | |
2544 | sackdelay_change; | |
2545 | } else { | |
2546 | sp->param_flags = | |
2547 | (sp->param_flags & ~SPP_SACKDELAY) | | |
2548 | sackdelay_change; | |
2549 | } | |
2550 | } | |
2551 | ||
37051f73 APO |
2552 | /* Note that a value of zero indicates the current setting should be |
2553 | left unchanged. | |
bdf3092a | 2554 | */ |
37051f73 | 2555 | if (params->spp_pathmaxrxt) { |
52ccb8e9 FF |
2556 | if (trans) { |
2557 | trans->pathmaxrxt = params->spp_pathmaxrxt; | |
2558 | } else if (asoc) { | |
2559 | asoc->pathmaxrxt = params->spp_pathmaxrxt; | |
2560 | } else { | |
2561 | sp->pathmaxrxt = params->spp_pathmaxrxt; | |
2562 | } | |
2563 | } | |
2564 | ||
0b0dce7a | 2565 | if (params->spp_flags & SPP_IPV6_FLOWLABEL) { |
741880e1 XL |
2566 | if (trans) { |
2567 | if (trans->ipaddr.sa.sa_family == AF_INET6) { | |
2568 | trans->flowlabel = params->spp_ipv6_flowlabel & | |
2569 | SCTP_FLOWLABEL_VAL_MASK; | |
2570 | trans->flowlabel |= SCTP_FLOWLABEL_SET_MASK; | |
2571 | } | |
0b0dce7a | 2572 | } else if (asoc) { |
af8a2b8b XL |
2573 | struct sctp_transport *t; |
2574 | ||
2575 | list_for_each_entry(t, &asoc->peer.transport_addr_list, | |
0b0dce7a | 2576 | transports) { |
af8a2b8b | 2577 | if (t->ipaddr.sa.sa_family != AF_INET6) |
0b0dce7a | 2578 | continue; |
af8a2b8b XL |
2579 | t->flowlabel = params->spp_ipv6_flowlabel & |
2580 | SCTP_FLOWLABEL_VAL_MASK; | |
2581 | t->flowlabel |= SCTP_FLOWLABEL_SET_MASK; | |
0b0dce7a XL |
2582 | } |
2583 | asoc->flowlabel = params->spp_ipv6_flowlabel & | |
2584 | SCTP_FLOWLABEL_VAL_MASK; | |
2585 | asoc->flowlabel |= SCTP_FLOWLABEL_SET_MASK; | |
2586 | } else if (sctp_opt2sk(sp)->sk_family == AF_INET6) { | |
2587 | sp->flowlabel = params->spp_ipv6_flowlabel & | |
2588 | SCTP_FLOWLABEL_VAL_MASK; | |
2589 | sp->flowlabel |= SCTP_FLOWLABEL_SET_MASK; | |
2590 | } | |
2591 | } | |
2592 | ||
2593 | if (params->spp_flags & SPP_DSCP) { | |
2594 | if (trans) { | |
2595 | trans->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK; | |
2596 | trans->dscp |= SCTP_DSCP_SET_MASK; | |
2597 | } else if (asoc) { | |
af8a2b8b XL |
2598 | struct sctp_transport *t; |
2599 | ||
2600 | list_for_each_entry(t, &asoc->peer.transport_addr_list, | |
0b0dce7a | 2601 | transports) { |
af8a2b8b XL |
2602 | t->dscp = params->spp_dscp & |
2603 | SCTP_DSCP_VAL_MASK; | |
2604 | t->dscp |= SCTP_DSCP_SET_MASK; | |
0b0dce7a XL |
2605 | } |
2606 | asoc->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK; | |
2607 | asoc->dscp |= SCTP_DSCP_SET_MASK; | |
2608 | } else { | |
2609 | sp->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK; | |
2610 | sp->dscp |= SCTP_DSCP_SET_MASK; | |
2611 | } | |
2612 | } | |
2613 | ||
52ccb8e9 FF |
2614 | return 0; |
2615 | } | |
2616 | ||
1da177e4 | 2617 | static int sctp_setsockopt_peer_addr_params(struct sock *sk, |
9b7b0d1a | 2618 | struct sctp_paddrparams *params, |
b7058842 | 2619 | unsigned int optlen) |
1da177e4 | 2620 | { |
52ccb8e9 FF |
2621 | struct sctp_transport *trans = NULL; |
2622 | struct sctp_association *asoc = NULL; | |
2623 | struct sctp_sock *sp = sctp_sk(sk); | |
1da177e4 | 2624 | int error; |
52ccb8e9 | 2625 | int hb_change, pmtud_change, sackdelay_change; |
1da177e4 | 2626 | |
9b7b0d1a | 2627 | if (optlen == ALIGN(offsetof(struct sctp_paddrparams, |
0b0dce7a | 2628 | spp_ipv6_flowlabel), 4)) { |
9b7b0d1a | 2629 | if (params->spp_flags & (SPP_DSCP | SPP_IPV6_FLOWLABEL)) |
0b0dce7a | 2630 | return -EINVAL; |
9b7b0d1a | 2631 | } else if (optlen != sizeof(*params)) { |
cb3f837b | 2632 | return -EINVAL; |
0b0dce7a | 2633 | } |
1da177e4 | 2634 | |
52ccb8e9 | 2635 | /* Validate flags and value parameters. */ |
9b7b0d1a CH |
2636 | hb_change = params->spp_flags & SPP_HB; |
2637 | pmtud_change = params->spp_flags & SPP_PMTUD; | |
2638 | sackdelay_change = params->spp_flags & SPP_SACKDELAY; | |
52ccb8e9 FF |
2639 | |
2640 | if (hb_change == SPP_HB || | |
2641 | pmtud_change == SPP_PMTUD || | |
2642 | sackdelay_change == SPP_SACKDELAY || | |
9b7b0d1a CH |
2643 | params->spp_sackdelay > 500 || |
2644 | (params->spp_pathmtu && | |
2645 | params->spp_pathmtu < SCTP_DEFAULT_MINSEGMENT)) | |
52ccb8e9 | 2646 | return -EINVAL; |
1da177e4 | 2647 | |
52ccb8e9 FF |
2648 | /* If an address other than INADDR_ANY is specified, and |
2649 | * no transport is found, then the request is invalid. | |
2650 | */ | |
9b7b0d1a CH |
2651 | if (!sctp_is_any(sk, (union sctp_addr *)¶ms->spp_address)) { |
2652 | trans = sctp_addr_id2transport(sk, ¶ms->spp_address, | |
2653 | params->spp_assoc_id); | |
52ccb8e9 | 2654 | if (!trans) |
1da177e4 | 2655 | return -EINVAL; |
1da177e4 LT |
2656 | } |
2657 | ||
b99e5e02 XL |
2658 | /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the |
2659 | * socket is a one to many style socket, and an association | |
2660 | * was not found, then the id was invalid. | |
52ccb8e9 | 2661 | */ |
9b7b0d1a CH |
2662 | asoc = sctp_id2assoc(sk, params->spp_assoc_id); |
2663 | if (!asoc && params->spp_assoc_id != SCTP_FUTURE_ASSOC && | |
b99e5e02 | 2664 | sctp_style(sk, UDP)) |
1da177e4 LT |
2665 | return -EINVAL; |
2666 | ||
52ccb8e9 FF |
2667 | /* Heartbeat demand can only be sent on a transport or |
2668 | * association, but not a socket. | |
1da177e4 | 2669 | */ |
9b7b0d1a | 2670 | if (params->spp_flags & SPP_HB_DEMAND && !trans && !asoc) |
52ccb8e9 FF |
2671 | return -EINVAL; |
2672 | ||
2673 | /* Process parameters. */ | |
9b7b0d1a | 2674 | error = sctp_apply_peer_addr_params(params, trans, asoc, sp, |
52ccb8e9 FF |
2675 | hb_change, pmtud_change, |
2676 | sackdelay_change); | |
1da177e4 | 2677 | |
52ccb8e9 FF |
2678 | if (error) |
2679 | return error; | |
2680 | ||
2681 | /* If changes are for association, also apply parameters to each | |
2682 | * transport. | |
1da177e4 | 2683 | */ |
52ccb8e9 | 2684 | if (!trans && asoc) { |
9dbc15f0 RD |
2685 | list_for_each_entry(trans, &asoc->peer.transport_addr_list, |
2686 | transports) { | |
9b7b0d1a | 2687 | sctp_apply_peer_addr_params(params, trans, asoc, sp, |
52ccb8e9 FF |
2688 | hb_change, pmtud_change, |
2689 | sackdelay_change); | |
2690 | } | |
2691 | } | |
1da177e4 LT |
2692 | |
2693 | return 0; | |
2694 | } | |
2695 | ||
0ea5e4df | 2696 | static inline __u32 sctp_spp_sackdelay_enable(__u32 param_flags) |
2697 | { | |
2698 | return (param_flags & ~SPP_SACKDELAY) | SPP_SACKDELAY_ENABLE; | |
2699 | } | |
2700 | ||
2701 | static inline __u32 sctp_spp_sackdelay_disable(__u32 param_flags) | |
2702 | { | |
2703 | return (param_flags & ~SPP_SACKDELAY) | SPP_SACKDELAY_DISABLE; | |
2704 | } | |
2705 | ||
9c5829e1 XL |
2706 | static void sctp_apply_asoc_delayed_ack(struct sctp_sack_info *params, |
2707 | struct sctp_association *asoc) | |
2708 | { | |
2709 | struct sctp_transport *trans; | |
2710 | ||
2711 | if (params->sack_delay) { | |
2712 | asoc->sackdelay = msecs_to_jiffies(params->sack_delay); | |
2713 | asoc->param_flags = | |
2714 | sctp_spp_sackdelay_enable(asoc->param_flags); | |
2715 | } | |
2716 | if (params->sack_freq == 1) { | |
2717 | asoc->param_flags = | |
2718 | sctp_spp_sackdelay_disable(asoc->param_flags); | |
2719 | } else if (params->sack_freq > 1) { | |
2720 | asoc->sackfreq = params->sack_freq; | |
2721 | asoc->param_flags = | |
2722 | sctp_spp_sackdelay_enable(asoc->param_flags); | |
2723 | } | |
2724 | ||
2725 | list_for_each_entry(trans, &asoc->peer.transport_addr_list, | |
2726 | transports) { | |
2727 | if (params->sack_delay) { | |
2728 | trans->sackdelay = msecs_to_jiffies(params->sack_delay); | |
2729 | trans->param_flags = | |
2730 | sctp_spp_sackdelay_enable(trans->param_flags); | |
2731 | } | |
2732 | if (params->sack_freq == 1) { | |
2733 | trans->param_flags = | |
2734 | sctp_spp_sackdelay_disable(trans->param_flags); | |
2735 | } else if (params->sack_freq > 1) { | |
2736 | trans->sackfreq = params->sack_freq; | |
2737 | trans->param_flags = | |
2738 | sctp_spp_sackdelay_enable(trans->param_flags); | |
2739 | } | |
2740 | } | |
2741 | } | |
2742 | ||
d364d927 WY |
2743 | /* |
2744 | * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK) | |
2745 | * | |
2746 | * This option will effect the way delayed acks are performed. This | |
2747 | * option allows you to get or set the delayed ack time, in | |
2748 | * milliseconds. It also allows changing the delayed ack frequency. | |
2749 | * Changing the frequency to 1 disables the delayed sack algorithm. If | |
2750 | * the assoc_id is 0, then this sets or gets the endpoints default | |
2751 | * values. If the assoc_id field is non-zero, then the set or get | |
2752 | * effects the specified association for the one to many model (the | |
2753 | * assoc_id field is ignored by the one to one model). Note that if | |
2754 | * sack_delay or sack_freq are 0 when setting this option, then the | |
2755 | * current values will remain unchanged. | |
2756 | * | |
2757 | * struct sctp_sack_info { | |
2758 | * sctp_assoc_t sack_assoc_id; | |
2759 | * uint32_t sack_delay; | |
2760 | * uint32_t sack_freq; | |
2761 | * }; | |
2762 | * | |
2763 | * sack_assoc_id - This parameter, indicates which association the user | |
2764 | * is performing an action upon. Note that if this field's value is | |
2765 | * zero then the endpoints default value is changed (effecting future | |
2766 | * associations only). | |
2767 | * | |
2768 | * sack_delay - This parameter contains the number of milliseconds that | |
2769 | * the user is requesting the delayed ACK timer be set to. Note that | |
2770 | * this value is defined in the standard to be between 200 and 500 | |
2771 | * milliseconds. | |
2772 | * | |
2773 | * sack_freq - This parameter contains the number of packets that must | |
2774 | * be received before a sack is sent without waiting for the delay | |
2775 | * timer to expire. The default value for this is 2, setting this | |
2776 | * value to 1 will disable the delayed sack algorithm. | |
7708610b | 2777 | */ |
dfd3d526 CH |
2778 | static int __sctp_setsockopt_delayed_ack(struct sock *sk, |
2779 | struct sctp_sack_info *params) | |
7708610b | 2780 | { |
9c5829e1 XL |
2781 | struct sctp_sock *sp = sctp_sk(sk); |
2782 | struct sctp_association *asoc; | |
7708610b | 2783 | |
7708610b | 2784 | /* Validate value parameter. */ |
ebb25def | 2785 | if (params->sack_delay > 500) |
7708610b FF |
2786 | return -EINVAL; |
2787 | ||
9c5829e1 XL |
2788 | /* Get association, if sack_assoc_id != SCTP_FUTURE_ASSOC and the |
2789 | * socket is a one to many style socket, and an association | |
2790 | * was not found, then the id was invalid. | |
d808ad9a | 2791 | */ |
ebb25def CH |
2792 | asoc = sctp_id2assoc(sk, params->sack_assoc_id); |
2793 | if (!asoc && params->sack_assoc_id > SCTP_ALL_ASSOC && | |
9c5829e1 | 2794 | sctp_style(sk, UDP)) |
7708610b FF |
2795 | return -EINVAL; |
2796 | ||
9c5829e1 | 2797 | if (asoc) { |
ebb25def | 2798 | sctp_apply_asoc_delayed_ack(params, asoc); |
9c5829e1 XL |
2799 | |
2800 | return 0; | |
2801 | } | |
2802 | ||
8e2614fc | 2803 | if (sctp_style(sk, TCP)) |
ebb25def | 2804 | params->sack_assoc_id = SCTP_FUTURE_ASSOC; |
8e2614fc | 2805 | |
ebb25def CH |
2806 | if (params->sack_assoc_id == SCTP_FUTURE_ASSOC || |
2807 | params->sack_assoc_id == SCTP_ALL_ASSOC) { | |
2808 | if (params->sack_delay) { | |
2809 | sp->sackdelay = params->sack_delay; | |
d808ad9a | 2810 | sp->param_flags = |
0ea5e4df | 2811 | sctp_spp_sackdelay_enable(sp->param_flags); |
7708610b | 2812 | } |
ebb25def | 2813 | if (params->sack_freq == 1) { |
d808ad9a | 2814 | sp->param_flags = |
0ea5e4df | 2815 | sctp_spp_sackdelay_disable(sp->param_flags); |
ebb25def CH |
2816 | } else if (params->sack_freq > 1) { |
2817 | sp->sackfreq = params->sack_freq; | |
d364d927 | 2818 | sp->param_flags = |
0ea5e4df | 2819 | sctp_spp_sackdelay_enable(sp->param_flags); |
d364d927 | 2820 | } |
7708610b FF |
2821 | } |
2822 | ||
ebb25def CH |
2823 | if (params->sack_assoc_id == SCTP_CURRENT_ASSOC || |
2824 | params->sack_assoc_id == SCTP_ALL_ASSOC) | |
9c5829e1 | 2825 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) |
ebb25def | 2826 | sctp_apply_asoc_delayed_ack(params, asoc); |
d808ad9a | 2827 | |
7708610b FF |
2828 | return 0; |
2829 | } | |
2830 | ||
dfd3d526 CH |
2831 | static int sctp_setsockopt_delayed_ack(struct sock *sk, |
2832 | struct sctp_sack_info *params, | |
2833 | unsigned int optlen) | |
2834 | { | |
2835 | if (optlen == sizeof(struct sctp_assoc_value)) { | |
2836 | struct sctp_assoc_value *v = (struct sctp_assoc_value *)params; | |
2837 | struct sctp_sack_info p; | |
2838 | ||
2839 | pr_warn_ratelimited(DEPRECATED | |
2840 | "%s (pid %d) " | |
2841 | "Use of struct sctp_assoc_value in delayed_ack socket option.\n" | |
2842 | "Use struct sctp_sack_info instead\n", | |
2843 | current->comm, task_pid_nr(current)); | |
2844 | ||
2845 | p.sack_assoc_id = v->assoc_id; | |
2846 | p.sack_delay = v->assoc_value; | |
2847 | p.sack_freq = v->assoc_value ? 0 : 1; | |
2848 | return __sctp_setsockopt_delayed_ack(sk, &p); | |
2849 | } | |
2850 | ||
2851 | if (optlen != sizeof(struct sctp_sack_info)) | |
2852 | return -EINVAL; | |
2853 | if (params->sack_delay == 0 && params->sack_freq == 0) | |
2854 | return 0; | |
2855 | return __sctp_setsockopt_delayed_ack(sk, params); | |
2856 | } | |
2857 | ||
1da177e4 LT |
2858 | /* 7.1.3 Initialization Parameters (SCTP_INITMSG) |
2859 | * | |
2860 | * Applications can specify protocol parameters for the default association | |
2861 | * initialization. The option name argument to setsockopt() and getsockopt() | |
2862 | * is SCTP_INITMSG. | |
2863 | * | |
2864 | * Setting initialization parameters is effective only on an unconnected | |
2865 | * socket (for UDP-style sockets only future associations are effected | |
2866 | * by the change). With TCP-style sockets, this option is inherited by | |
2867 | * sockets derived from a listener socket. | |
2868 | */ | |
9dfa6f04 CH |
2869 | static int sctp_setsockopt_initmsg(struct sock *sk, struct sctp_initmsg *sinit, |
2870 | unsigned int optlen) | |
1da177e4 | 2871 | { |
1da177e4 LT |
2872 | struct sctp_sock *sp = sctp_sk(sk); |
2873 | ||
2874 | if (optlen != sizeof(struct sctp_initmsg)) | |
2875 | return -EINVAL; | |
1da177e4 | 2876 | |
9dfa6f04 CH |
2877 | if (sinit->sinit_num_ostreams) |
2878 | sp->initmsg.sinit_num_ostreams = sinit->sinit_num_ostreams; | |
2879 | if (sinit->sinit_max_instreams) | |
2880 | sp->initmsg.sinit_max_instreams = sinit->sinit_max_instreams; | |
2881 | if (sinit->sinit_max_attempts) | |
2882 | sp->initmsg.sinit_max_attempts = sinit->sinit_max_attempts; | |
2883 | if (sinit->sinit_max_init_timeo) | |
2884 | sp->initmsg.sinit_max_init_timeo = sinit->sinit_max_init_timeo; | |
1da177e4 LT |
2885 | |
2886 | return 0; | |
2887 | } | |
2888 | ||
2889 | /* | |
2890 | * 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM) | |
2891 | * | |
2892 | * Applications that wish to use the sendto() system call may wish to | |
2893 | * specify a default set of parameters that would normally be supplied | |
2894 | * through the inclusion of ancillary data. This socket option allows | |
2895 | * such an application to set the default sctp_sndrcvinfo structure. | |
2896 | * The application that wishes to use this socket option simply passes | |
2897 | * in to this call the sctp_sndrcvinfo structure defined in Section | |
2898 | * 5.2.2) The input parameters accepted by this call include | |
2899 | * sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context, | |
2900 | * sinfo_timetolive. The user must provide the sinfo_assoc_id field in | |
2901 | * to this call if the caller is using the UDP model. | |
2902 | */ | |
2903 | static int sctp_setsockopt_default_send_param(struct sock *sk, | |
c23ad6d2 | 2904 | struct sctp_sndrcvinfo *info, |
b7058842 | 2905 | unsigned int optlen) |
1da177e4 | 2906 | { |
1da177e4 | 2907 | struct sctp_sock *sp = sctp_sk(sk); |
6b3fd5f3 | 2908 | struct sctp_association *asoc; |
1da177e4 | 2909 | |
c23ad6d2 | 2910 | if (optlen != sizeof(*info)) |
1da177e4 | 2911 | return -EINVAL; |
c23ad6d2 | 2912 | if (info->sinfo_flags & |
6b3fd5f3 GOV |
2913 | ~(SCTP_UNORDERED | SCTP_ADDR_OVER | |
2914 | SCTP_ABORT | SCTP_EOF)) | |
2915 | return -EINVAL; | |
1da177e4 | 2916 | |
c23ad6d2 CH |
2917 | asoc = sctp_id2assoc(sk, info->sinfo_assoc_id); |
2918 | if (!asoc && info->sinfo_assoc_id > SCTP_ALL_ASSOC && | |
707e45b3 | 2919 | sctp_style(sk, UDP)) |
1da177e4 | 2920 | return -EINVAL; |
707e45b3 | 2921 | |
1da177e4 | 2922 | if (asoc) { |
c23ad6d2 CH |
2923 | asoc->default_stream = info->sinfo_stream; |
2924 | asoc->default_flags = info->sinfo_flags; | |
2925 | asoc->default_ppid = info->sinfo_ppid; | |
2926 | asoc->default_context = info->sinfo_context; | |
2927 | asoc->default_timetolive = info->sinfo_timetolive; | |
707e45b3 XL |
2928 | |
2929 | return 0; | |
2930 | } | |
2931 | ||
1354e72f | 2932 | if (sctp_style(sk, TCP)) |
c23ad6d2 CH |
2933 | info->sinfo_assoc_id = SCTP_FUTURE_ASSOC; |
2934 | ||
2935 | if (info->sinfo_assoc_id == SCTP_FUTURE_ASSOC || | |
2936 | info->sinfo_assoc_id == SCTP_ALL_ASSOC) { | |
2937 | sp->default_stream = info->sinfo_stream; | |
2938 | sp->default_flags = info->sinfo_flags; | |
2939 | sp->default_ppid = info->sinfo_ppid; | |
2940 | sp->default_context = info->sinfo_context; | |
2941 | sp->default_timetolive = info->sinfo_timetolive; | |
1da177e4 LT |
2942 | } |
2943 | ||
c23ad6d2 CH |
2944 | if (info->sinfo_assoc_id == SCTP_CURRENT_ASSOC || |
2945 | info->sinfo_assoc_id == SCTP_ALL_ASSOC) { | |
707e45b3 | 2946 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) { |
c23ad6d2 CH |
2947 | asoc->default_stream = info->sinfo_stream; |
2948 | asoc->default_flags = info->sinfo_flags; | |
2949 | asoc->default_ppid = info->sinfo_ppid; | |
2950 | asoc->default_context = info->sinfo_context; | |
2951 | asoc->default_timetolive = info->sinfo_timetolive; | |
707e45b3 XL |
2952 | } |
2953 | } | |
2954 | ||
1da177e4 LT |
2955 | return 0; |
2956 | } | |
2957 | ||
6b3fd5f3 GOV |
2958 | /* RFC6458, Section 8.1.31. Set/get Default Send Parameters |
2959 | * (SCTP_DEFAULT_SNDINFO) | |
2960 | */ | |
2961 | static int sctp_setsockopt_default_sndinfo(struct sock *sk, | |
8a2409d3 | 2962 | struct sctp_sndinfo *info, |
6b3fd5f3 GOV |
2963 | unsigned int optlen) |
2964 | { | |
2965 | struct sctp_sock *sp = sctp_sk(sk); | |
2966 | struct sctp_association *asoc; | |
6b3fd5f3 | 2967 | |
8a2409d3 | 2968 | if (optlen != sizeof(*info)) |
6b3fd5f3 | 2969 | return -EINVAL; |
8a2409d3 | 2970 | if (info->snd_flags & |
6b3fd5f3 GOV |
2971 | ~(SCTP_UNORDERED | SCTP_ADDR_OVER | |
2972 | SCTP_ABORT | SCTP_EOF)) | |
2973 | return -EINVAL; | |
2974 | ||
8a2409d3 CH |
2975 | asoc = sctp_id2assoc(sk, info->snd_assoc_id); |
2976 | if (!asoc && info->snd_assoc_id > SCTP_ALL_ASSOC && | |
92fc3bd9 | 2977 | sctp_style(sk, UDP)) |
6b3fd5f3 | 2978 | return -EINVAL; |
92fc3bd9 | 2979 | |
6b3fd5f3 | 2980 | if (asoc) { |
8a2409d3 CH |
2981 | asoc->default_stream = info->snd_sid; |
2982 | asoc->default_flags = info->snd_flags; | |
2983 | asoc->default_ppid = info->snd_ppid; | |
2984 | asoc->default_context = info->snd_context; | |
92fc3bd9 XL |
2985 | |
2986 | return 0; | |
2987 | } | |
2988 | ||
a842e65b | 2989 | if (sctp_style(sk, TCP)) |
8a2409d3 CH |
2990 | info->snd_assoc_id = SCTP_FUTURE_ASSOC; |
2991 | ||
2992 | if (info->snd_assoc_id == SCTP_FUTURE_ASSOC || | |
2993 | info->snd_assoc_id == SCTP_ALL_ASSOC) { | |
2994 | sp->default_stream = info->snd_sid; | |
2995 | sp->default_flags = info->snd_flags; | |
2996 | sp->default_ppid = info->snd_ppid; | |
2997 | sp->default_context = info->snd_context; | |
6b3fd5f3 GOV |
2998 | } |
2999 | ||
8a2409d3 CH |
3000 | if (info->snd_assoc_id == SCTP_CURRENT_ASSOC || |
3001 | info->snd_assoc_id == SCTP_ALL_ASSOC) { | |
92fc3bd9 | 3002 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) { |
8a2409d3 CH |
3003 | asoc->default_stream = info->snd_sid; |
3004 | asoc->default_flags = info->snd_flags; | |
3005 | asoc->default_ppid = info->snd_ppid; | |
3006 | asoc->default_context = info->snd_context; | |
92fc3bd9 XL |
3007 | } |
3008 | } | |
3009 | ||
6b3fd5f3 GOV |
3010 | return 0; |
3011 | } | |
3012 | ||
1da177e4 LT |
3013 | /* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR) |
3014 | * | |
3015 | * Requests that the local SCTP stack use the enclosed peer address as | |
3016 | * the association primary. The enclosed address must be one of the | |
3017 | * association peer's addresses. | |
3018 | */ | |
1eec6958 | 3019 | static int sctp_setsockopt_primary_addr(struct sock *sk, struct sctp_prim *prim, |
b7058842 | 3020 | unsigned int optlen) |
1da177e4 | 3021 | { |
1da177e4 | 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 | ||
2277c7cd | 3029 | /* Allow security module to validate address but need address len. */ |
1eec6958 | 3030 | af = sctp_get_af_specific(prim->ssp_addr.ss_family); |
2277c7cd RH |
3031 | if (!af) |
3032 | return -EINVAL; | |
3033 | ||
3034 | err = security_sctp_bind_connect(sk, SCTP_PRIMARY_ADDR, | |
1eec6958 | 3035 | (struct sockaddr *)&prim->ssp_addr, |
2277c7cd RH |
3036 | af->sockaddr_len); |
3037 | if (err) | |
3038 | return err; | |
3039 | ||
1eec6958 | 3040 | trans = sctp_addr_id2transport(sk, &prim->ssp_addr, prim->ssp_assoc_id); |
1da177e4 LT |
3041 | if (!trans) |
3042 | return -EINVAL; | |
3043 | ||
3044 | sctp_assoc_set_primary(trans->asoc, trans); | |
3045 | ||
3046 | return 0; | |
3047 | } | |
3048 | ||
3049 | /* | |
3050 | * 7.1.5 SCTP_NODELAY | |
3051 | * | |
3052 | * Turn on/off any Nagle-like algorithm. This means that packets are | |
3053 | * generally sent as soon as possible and no unnecessary delays are | |
3054 | * introduced, at the cost of more packets in the network. Expects an | |
3055 | * integer boolean flag. | |
3056 | */ | |
f87ddbc0 | 3057 | static int sctp_setsockopt_nodelay(struct sock *sk, int *val, |
b7058842 | 3058 | unsigned int optlen) |
1da177e4 | 3059 | { |
1da177e4 LT |
3060 | if (optlen < sizeof(int)) |
3061 | return -EINVAL; | |
f87ddbc0 | 3062 | sctp_sk(sk)->nodelay = (*val == 0) ? 0 : 1; |
1da177e4 LT |
3063 | return 0; |
3064 | } | |
3065 | ||
3066 | /* | |
3067 | * | |
3068 | * 7.1.1 SCTP_RTOINFO | |
3069 | * | |
3070 | * The protocol parameters used to initialize and bound retransmission | |
3071 | * timeout (RTO) are tunable. sctp_rtoinfo structure is used to access | |
3072 | * and modify these parameters. | |
3073 | * All parameters are time values, in milliseconds. A value of 0, when | |
3074 | * modifying the parameters, indicates that the current value should not | |
3075 | * be changed. | |
3076 | * | |
3077 | */ | |
af5ae60e CH |
3078 | static int sctp_setsockopt_rtoinfo(struct sock *sk, |
3079 | struct sctp_rtoinfo *rtoinfo, | |
3080 | unsigned int optlen) | |
b7058842 | 3081 | { |
1da177e4 | 3082 | struct sctp_association *asoc; |
85f935d4 | 3083 | unsigned long rto_min, rto_max; |
3084 | struct sctp_sock *sp = sctp_sk(sk); | |
1da177e4 LT |
3085 | |
3086 | if (optlen != sizeof (struct sctp_rtoinfo)) | |
3087 | return -EINVAL; | |
3088 | ||
af5ae60e | 3089 | asoc = sctp_id2assoc(sk, rtoinfo->srto_assoc_id); |
1da177e4 LT |
3090 | |
3091 | /* Set the values to the specific association */ | |
af5ae60e | 3092 | if (!asoc && rtoinfo->srto_assoc_id != SCTP_FUTURE_ASSOC && |
7adb5ed5 | 3093 | sctp_style(sk, UDP)) |
1da177e4 LT |
3094 | return -EINVAL; |
3095 | ||
af5ae60e CH |
3096 | rto_max = rtoinfo->srto_max; |
3097 | rto_min = rtoinfo->srto_min; | |
85f935d4 | 3098 | |
3099 | if (rto_max) | |
3100 | rto_max = asoc ? msecs_to_jiffies(rto_max) : rto_max; | |
3101 | else | |
3102 | rto_max = asoc ? asoc->rto_max : sp->rtoinfo.srto_max; | |
3103 | ||
3104 | if (rto_min) | |
3105 | rto_min = asoc ? msecs_to_jiffies(rto_min) : rto_min; | |
3106 | else | |
3107 | rto_min = asoc ? asoc->rto_min : sp->rtoinfo.srto_min; | |
3108 | ||
3109 | if (rto_min > rto_max) | |
3110 | return -EINVAL; | |
3111 | ||
1da177e4 | 3112 | if (asoc) { |
af5ae60e | 3113 | if (rtoinfo->srto_initial != 0) |
d808ad9a | 3114 | asoc->rto_initial = |
af5ae60e | 3115 | msecs_to_jiffies(rtoinfo->srto_initial); |
85f935d4 | 3116 | asoc->rto_max = rto_max; |
3117 | asoc->rto_min = rto_min; | |
1da177e4 LT |
3118 | } else { |
3119 | /* If there is no association or the association-id = 0 | |
3120 | * set the values to the endpoint. | |
3121 | */ | |
af5ae60e CH |
3122 | if (rtoinfo->srto_initial != 0) |
3123 | sp->rtoinfo.srto_initial = rtoinfo->srto_initial; | |
85f935d4 | 3124 | sp->rtoinfo.srto_max = rto_max; |
3125 | sp->rtoinfo.srto_min = rto_min; | |
1da177e4 LT |
3126 | } |
3127 | ||
3128 | return 0; | |
3129 | } | |
3130 | ||
3131 | /* | |
3132 | * | |
3133 | * 7.1.2 SCTP_ASSOCINFO | |
3134 | * | |
59c51591 | 3135 | * This option is used to tune the maximum retransmission attempts |
1da177e4 LT |
3136 | * of the association. |
3137 | * Returns an error if the new association retransmission value is | |
3138 | * greater than the sum of the retransmission value of the peer. | |
3139 | * See [SCTP] for more information. | |
3140 | * | |
3141 | */ | |
5b864c8d CH |
3142 | static int sctp_setsockopt_associnfo(struct sock *sk, |
3143 | struct sctp_assocparams *assocparams, | |
3144 | unsigned int optlen) | |
1da177e4 LT |
3145 | { |
3146 | ||
1da177e4 LT |
3147 | struct sctp_association *asoc; |
3148 | ||
3149 | if (optlen != sizeof(struct sctp_assocparams)) | |
3150 | return -EINVAL; | |
1da177e4 | 3151 | |
5b864c8d | 3152 | asoc = sctp_id2assoc(sk, assocparams->sasoc_assoc_id); |
1da177e4 | 3153 | |
5b864c8d | 3154 | if (!asoc && assocparams->sasoc_assoc_id != SCTP_FUTURE_ASSOC && |
8889394d | 3155 | sctp_style(sk, UDP)) |
1da177e4 LT |
3156 | return -EINVAL; |
3157 | ||
3158 | /* Set the values to the specific association */ | |
3159 | if (asoc) { | |
5b864c8d | 3160 | if (assocparams->sasoc_asocmaxrxt != 0) { |
402d68c4 VY |
3161 | __u32 path_sum = 0; |
3162 | int paths = 0; | |
402d68c4 VY |
3163 | struct sctp_transport *peer_addr; |
3164 | ||
9dbc15f0 RD |
3165 | list_for_each_entry(peer_addr, &asoc->peer.transport_addr_list, |
3166 | transports) { | |
402d68c4 VY |
3167 | path_sum += peer_addr->pathmaxrxt; |
3168 | paths++; | |
3169 | } | |
3170 | ||
025dfdaf | 3171 | /* Only validate asocmaxrxt if we have more than |
402d68c4 VY |
3172 | * one path/transport. We do this because path |
3173 | * retransmissions are only counted when we have more | |
3174 | * then one path. | |
3175 | */ | |
3176 | if (paths > 1 && | |
5b864c8d | 3177 | assocparams->sasoc_asocmaxrxt > path_sum) |
402d68c4 VY |
3178 | return -EINVAL; |
3179 | ||
5b864c8d | 3180 | asoc->max_retrans = assocparams->sasoc_asocmaxrxt; |
402d68c4 VY |
3181 | } |
3182 | ||
5b864c8d CH |
3183 | if (assocparams->sasoc_cookie_life != 0) |
3184 | asoc->cookie_life = | |
3185 | ms_to_ktime(assocparams->sasoc_cookie_life); | |
1da177e4 LT |
3186 | } else { |
3187 | /* Set the values to the endpoint */ | |
3188 | struct sctp_sock *sp = sctp_sk(sk); | |
3189 | ||
5b864c8d | 3190 | if (assocparams->sasoc_asocmaxrxt != 0) |
1da177e4 | 3191 | sp->assocparams.sasoc_asocmaxrxt = |
5b864c8d CH |
3192 | assocparams->sasoc_asocmaxrxt; |
3193 | if (assocparams->sasoc_cookie_life != 0) | |
1da177e4 | 3194 | sp->assocparams.sasoc_cookie_life = |
5b864c8d | 3195 | assocparams->sasoc_cookie_life; |
1da177e4 LT |
3196 | } |
3197 | return 0; | |
3198 | } | |
3199 | ||
3200 | /* | |
3201 | * 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR) | |
3202 | * | |
3203 | * This socket option is a boolean flag which turns on or off mapped V4 | |
3204 | * addresses. If this option is turned on and the socket is type | |
3205 | * PF_INET6, then IPv4 addresses will be mapped to V6 representation. | |
3206 | * If this option is turned off, then no mapping will be done of V4 | |
3207 | * addresses and a user will receive both PF_INET6 and PF_INET type | |
3208 | * addresses on the socket. | |
3209 | */ | |
ffc08f08 CH |
3210 | static int sctp_setsockopt_mappedv4(struct sock *sk, int *val, |
3211 | unsigned int optlen) | |
1da177e4 | 3212 | { |
1da177e4 LT |
3213 | struct sctp_sock *sp = sctp_sk(sk); |
3214 | ||
3215 | if (optlen < sizeof(int)) | |
3216 | return -EINVAL; | |
ffc08f08 | 3217 | if (*val) |
1da177e4 LT |
3218 | sp->v4mapped = 1; |
3219 | else | |
3220 | sp->v4mapped = 0; | |
3221 | ||
3222 | return 0; | |
3223 | } | |
3224 | ||
3225 | /* | |
e89c2095 WY |
3226 | * 8.1.16. Get or Set the Maximum Fragmentation Size (SCTP_MAXSEG) |
3227 | * This option will get or set the maximum size to put in any outgoing | |
3228 | * SCTP DATA chunk. If a message is larger than this size it will be | |
1da177e4 LT |
3229 | * fragmented by SCTP into the specified size. Note that the underlying |
3230 | * SCTP implementation may fragment into smaller sized chunks when the | |
3231 | * PMTU of the underlying association is smaller than the value set by | |
e89c2095 WY |
3232 | * the user. The default value for this option is '0' which indicates |
3233 | * the user is NOT limiting fragmentation and only the PMTU will effect | |
3234 | * SCTP's choice of DATA chunk size. Note also that values set larger | |
3235 | * than the maximum size of an IP datagram will effectively let SCTP | |
3236 | * control fragmentation (i.e. the same as setting this option to 0). | |
3237 | * | |
3238 | * The following structure is used to access and modify this parameter: | |
3239 | * | |
3240 | * struct sctp_assoc_value { | |
3241 | * sctp_assoc_t assoc_id; | |
3242 | * uint32_t assoc_value; | |
3243 | * }; | |
3244 | * | |
3245 | * assoc_id: This parameter is ignored for one-to-one style sockets. | |
3246 | * For one-to-many style sockets this parameter indicates which | |
3247 | * association the user is performing an action upon. Note that if | |
3248 | * this field's value is zero then the endpoints default value is | |
3249 | * changed (effecting future associations only). | |
3250 | * assoc_value: This parameter specifies the maximum size in bytes. | |
1da177e4 | 3251 | */ |
dcd03575 CH |
3252 | static int sctp_setsockopt_maxseg(struct sock *sk, |
3253 | struct sctp_assoc_value *params, | |
3254 | unsigned int optlen) | |
1da177e4 | 3255 | { |
ecca8f88 | 3256 | struct sctp_sock *sp = sctp_sk(sk); |
1da177e4 | 3257 | struct sctp_association *asoc; |
dcd03575 | 3258 | sctp_assoc_t assoc_id; |
1da177e4 LT |
3259 | int val; |
3260 | ||
e89c2095 | 3261 | if (optlen == sizeof(int)) { |
94f65193 | 3262 | pr_warn_ratelimited(DEPRECATED |
f916ec96 | 3263 | "%s (pid %d) " |
94f65193 | 3264 | "Use of int in maxseg socket option.\n" |
f916ec96 NH |
3265 | "Use struct sctp_assoc_value instead\n", |
3266 | current->comm, task_pid_nr(current)); | |
dcd03575 CH |
3267 | assoc_id = SCTP_FUTURE_ASSOC; |
3268 | val = *(int *)params; | |
e89c2095 | 3269 | } else if (optlen == sizeof(struct sctp_assoc_value)) { |
dcd03575 CH |
3270 | assoc_id = params->assoc_id; |
3271 | val = params->assoc_value; | |
ecca8f88 | 3272 | } else { |
1da177e4 | 3273 | return -EINVAL; |
ecca8f88 | 3274 | } |
e89c2095 | 3275 | |
dcd03575 CH |
3276 | asoc = sctp_id2assoc(sk, assoc_id); |
3277 | if (!asoc && assoc_id != SCTP_FUTURE_ASSOC && | |
6fd769be XL |
3278 | sctp_style(sk, UDP)) |
3279 | return -EINVAL; | |
439ef030 | 3280 | |
ecca8f88 XL |
3281 | if (val) { |
3282 | int min_len, max_len; | |
439ef030 MRL |
3283 | __u16 datasize = asoc ? sctp_datachk_len(&asoc->stream) : |
3284 | sizeof(struct sctp_data_chunk); | |
1da177e4 | 3285 | |
afd0a800 | 3286 | min_len = sctp_min_frag_point(sp, datasize); |
439ef030 | 3287 | max_len = SCTP_MAX_CHUNK_LEN - datasize; |
e89c2095 | 3288 | |
ecca8f88 XL |
3289 | if (val < min_len || val > max_len) |
3290 | return -EINVAL; | |
3291 | } | |
3292 | ||
e89c2095 | 3293 | if (asoc) { |
f68b2e05 | 3294 | asoc->user_frag = val; |
2f5e3c9d | 3295 | sctp_assoc_update_frag_point(asoc); |
e89c2095 WY |
3296 | } else { |
3297 | sp->user_frag = val; | |
1da177e4 LT |
3298 | } |
3299 | ||
3300 | return 0; | |
3301 | } | |
3302 | ||
3303 | ||
3304 | /* | |
3305 | * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR) | |
3306 | * | |
3307 | * Requests that the peer mark the enclosed address as the association | |
3308 | * primary. The enclosed address must be one of the association's | |
3309 | * locally bound addresses. The following structure is used to make a | |
3310 | * set primary request: | |
3311 | */ | |
46a0ae9d CH |
3312 | static int sctp_setsockopt_peer_primary_addr(struct sock *sk, |
3313 | struct sctp_setpeerprim *prim, | |
b7058842 | 3314 | unsigned int optlen) |
1da177e4 LT |
3315 | { |
3316 | struct sctp_sock *sp; | |
1da177e4 | 3317 | struct sctp_association *asoc = NULL; |
1da177e4 | 3318 | struct sctp_chunk *chunk; |
40a01039 | 3319 | struct sctp_af *af; |
1da177e4 LT |
3320 | int err; |
3321 | ||
3322 | sp = sctp_sk(sk); | |
1da177e4 | 3323 | |
4e27428f | 3324 | if (!sp->ep->asconf_enable) |
1da177e4 LT |
3325 | return -EPERM; |
3326 | ||
3327 | if (optlen != sizeof(struct sctp_setpeerprim)) | |
3328 | return -EINVAL; | |
3329 | ||
46a0ae9d | 3330 | asoc = sctp_id2assoc(sk, prim->sspp_assoc_id); |
d808ad9a | 3331 | if (!asoc) |
1da177e4 LT |
3332 | return -EINVAL; |
3333 | ||
3334 | if (!asoc->peer.asconf_capable) | |
3335 | return -EPERM; | |
3336 | ||
3337 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_SET_PRIMARY) | |
3338 | return -EPERM; | |
3339 | ||
3340 | if (!sctp_state(asoc, ESTABLISHED)) | |
3341 | return -ENOTCONN; | |
3342 | ||
46a0ae9d | 3343 | af = sctp_get_af_specific(prim->sspp_addr.ss_family); |
40a01039 WY |
3344 | if (!af) |
3345 | return -EINVAL; | |
3346 | ||
46a0ae9d | 3347 | if (!af->addr_valid((union sctp_addr *)&prim->sspp_addr, sp, NULL)) |
40a01039 WY |
3348 | return -EADDRNOTAVAIL; |
3349 | ||
46a0ae9d | 3350 | if (!sctp_assoc_lookup_laddr(asoc, (union sctp_addr *)&prim->sspp_addr)) |
1da177e4 LT |
3351 | return -EADDRNOTAVAIL; |
3352 | ||
2277c7cd RH |
3353 | /* Allow security module to validate address. */ |
3354 | err = security_sctp_bind_connect(sk, SCTP_SET_PEER_PRIMARY_ADDR, | |
46a0ae9d | 3355 | (struct sockaddr *)&prim->sspp_addr, |
2277c7cd RH |
3356 | af->sockaddr_len); |
3357 | if (err) | |
3358 | return err; | |
3359 | ||
1da177e4 LT |
3360 | /* Create an ASCONF chunk with SET_PRIMARY parameter */ |
3361 | chunk = sctp_make_asconf_set_prim(asoc, | |
46a0ae9d | 3362 | (union sctp_addr *)&prim->sspp_addr); |
1da177e4 LT |
3363 | if (!chunk) |
3364 | return -ENOMEM; | |
3365 | ||
3366 | err = sctp_send_asconf(asoc, chunk); | |
3367 | ||
bb33381d | 3368 | pr_debug("%s: we set peer primary addr primitively\n", __func__); |
1da177e4 LT |
3369 | |
3370 | return err; | |
3371 | } | |
3372 | ||
07e5035c CH |
3373 | static int sctp_setsockopt_adaptation_layer(struct sock *sk, |
3374 | struct sctp_setadaptation *adapt, | |
b7058842 | 3375 | unsigned int optlen) |
1da177e4 | 3376 | { |
0f3fffd8 | 3377 | if (optlen != sizeof(struct sctp_setadaptation)) |
1da177e4 | 3378 | return -EINVAL; |
1da177e4 | 3379 | |
07e5035c | 3380 | sctp_sk(sk)->adaptation_ind = adapt->ssb_adaptation_ind; |
1da177e4 LT |
3381 | |
3382 | return 0; | |
3383 | } | |
3384 | ||
6ab792f5 ISJ |
3385 | /* |
3386 | * 7.1.29. Set or Get the default context (SCTP_CONTEXT) | |
3387 | * | |
3388 | * The context field in the sctp_sndrcvinfo structure is normally only | |
3389 | * used when a failed message is retrieved holding the value that was | |
3390 | * sent down on the actual send call. This option allows the setting of | |
3391 | * a default context on an association basis that will be received on | |
3392 | * reading messages from the peer. This is especially helpful in the | |
3393 | * one-2-many model for an application to keep some reference to an | |
3394 | * internal state machine that is processing messages on the | |
3395 | * association. Note that the setting of this value only effects | |
3396 | * received messages from the peer and does not effect the value that is | |
3397 | * saved with outbound messages. | |
3398 | */ | |
722eca9e CH |
3399 | static int sctp_setsockopt_context(struct sock *sk, |
3400 | struct sctp_assoc_value *params, | |
b7058842 | 3401 | unsigned int optlen) |
6ab792f5 | 3402 | { |
49b037ac | 3403 | struct sctp_sock *sp = sctp_sk(sk); |
6ab792f5 ISJ |
3404 | struct sctp_association *asoc; |
3405 | ||
3406 | if (optlen != sizeof(struct sctp_assoc_value)) | |
3407 | return -EINVAL; | |
6ab792f5 | 3408 | |
722eca9e CH |
3409 | asoc = sctp_id2assoc(sk, params->assoc_id); |
3410 | if (!asoc && params->assoc_id > SCTP_ALL_ASSOC && | |
49b037ac XL |
3411 | sctp_style(sk, UDP)) |
3412 | return -EINVAL; | |
6ab792f5 | 3413 | |
49b037ac | 3414 | if (asoc) { |
722eca9e | 3415 | asoc->default_rcv_context = params->assoc_value; |
49b037ac XL |
3416 | |
3417 | return 0; | |
6ab792f5 ISJ |
3418 | } |
3419 | ||
cface2cb | 3420 | if (sctp_style(sk, TCP)) |
722eca9e | 3421 | params->assoc_id = SCTP_FUTURE_ASSOC; |
cface2cb | 3422 | |
722eca9e CH |
3423 | if (params->assoc_id == SCTP_FUTURE_ASSOC || |
3424 | params->assoc_id == SCTP_ALL_ASSOC) | |
3425 | sp->default_rcv_context = params->assoc_value; | |
49b037ac | 3426 | |
722eca9e CH |
3427 | if (params->assoc_id == SCTP_CURRENT_ASSOC || |
3428 | params->assoc_id == SCTP_ALL_ASSOC) | |
49b037ac | 3429 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) |
722eca9e | 3430 | asoc->default_rcv_context = params->assoc_value; |
49b037ac | 3431 | |
6ab792f5 ISJ |
3432 | return 0; |
3433 | } | |
3434 | ||
b6e1331f VY |
3435 | /* |
3436 | * 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE) | |
3437 | * | |
3438 | * This options will at a minimum specify if the implementation is doing | |
3439 | * fragmented interleave. Fragmented interleave, for a one to many | |
3440 | * socket, is when subsequent calls to receive a message may return | |
3441 | * parts of messages from different associations. Some implementations | |
3442 | * may allow you to turn this value on or off. If so, when turned off, | |
3443 | * no fragment interleave will occur (which will cause a head of line | |
3444 | * blocking amongst multiple associations sharing the same one to many | |
3445 | * socket). When this option is turned on, then each receive call may | |
3446 | * come from a different association (thus the user must receive data | |
3447 | * with the extended calls (e.g. sctp_recvmsg) to keep track of which | |
3448 | * association each receive belongs to. | |
3449 | * | |
3450 | * This option takes a boolean value. A non-zero value indicates that | |
3451 | * fragmented interleave is on. A value of zero indicates that | |
3452 | * fragmented interleave is off. | |
3453 | * | |
3454 | * Note that it is important that an implementation that allows this | |
3455 | * option to be turned on, have it off by default. Otherwise an unaware | |
3456 | * application using the one to many model may become confused and act | |
3457 | * incorrectly. | |
3458 | */ | |
1031cea0 | 3459 | static int sctp_setsockopt_fragment_interleave(struct sock *sk, int *val, |
b7058842 | 3460 | unsigned int optlen) |
b6e1331f | 3461 | { |
b6e1331f VY |
3462 | if (optlen != sizeof(int)) |
3463 | return -EINVAL; | |
b6e1331f | 3464 | |
1031cea0 | 3465 | sctp_sk(sk)->frag_interleave = !!*val; |
772a5869 XL |
3466 | |
3467 | if (!sctp_sk(sk)->frag_interleave) | |
e55f4b8b | 3468 | sctp_sk(sk)->ep->intl_enable = 0; |
b6e1331f VY |
3469 | |
3470 | return 0; | |
3471 | } | |
3472 | ||
d49d91d7 | 3473 | /* |
8510b937 | 3474 | * 8.1.21. Set or Get the SCTP Partial Delivery Point |
d49d91d7 | 3475 | * (SCTP_PARTIAL_DELIVERY_POINT) |
8510b937 | 3476 | * |
d49d91d7 VY |
3477 | * This option will set or get the SCTP partial delivery point. This |
3478 | * point is the size of a message where the partial delivery API will be | |
3479 | * invoked to help free up rwnd space for the peer. Setting this to a | |
8510b937 | 3480 | * lower value will cause partial deliveries to happen more often. The |
d49d91d7 | 3481 | * calls argument is an integer that sets or gets the partial delivery |
8510b937 WY |
3482 | * point. Note also that the call will fail if the user attempts to set |
3483 | * this value larger than the socket receive buffer size. | |
3484 | * | |
3485 | * Note that any single message having a length smaller than or equal to | |
3486 | * the SCTP partial delivery point will be delivered in one single read | |
3487 | * call as long as the user provided buffer is large enough to hold the | |
3488 | * message. | |
d49d91d7 | 3489 | */ |
bb13d647 | 3490 | static int sctp_setsockopt_partial_delivery_point(struct sock *sk, u32 *val, |
b7058842 | 3491 | unsigned int optlen) |
d49d91d7 | 3492 | { |
d49d91d7 VY |
3493 | if (optlen != sizeof(u32)) |
3494 | return -EINVAL; | |
d49d91d7 | 3495 | |
8510b937 WY |
3496 | /* Note: We double the receive buffer from what the user sets |
3497 | * it to be, also initial rwnd is based on rcvbuf/2. | |
3498 | */ | |
bb13d647 | 3499 | if (*val > (sk->sk_rcvbuf >> 1)) |
8510b937 WY |
3500 | return -EINVAL; |
3501 | ||
bb13d647 | 3502 | sctp_sk(sk)->pd_point = *val; |
d49d91d7 VY |
3503 | |
3504 | return 0; /* is this the right error code? */ | |
3505 | } | |
3506 | ||
70331571 VY |
3507 | /* |
3508 | * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST) | |
3509 | * | |
3510 | * This option will allow a user to change the maximum burst of packets | |
3511 | * that can be emitted by this association. Note that the default value | |
3512 | * is 4, and some implementations may restrict this setting so that it | |
3513 | * can only be lowered. | |
3514 | * | |
3515 | * NOTE: This text doesn't seem right. Do this on a socket basis with | |
3516 | * future associations inheriting the socket value. | |
3517 | */ | |
3518 | static int sctp_setsockopt_maxburst(struct sock *sk, | |
f5bee0ad | 3519 | struct sctp_assoc_value *params, |
b7058842 | 3520 | unsigned int optlen) |
70331571 | 3521 | { |
e0651a0d | 3522 | struct sctp_sock *sp = sctp_sk(sk); |
219b99a9 | 3523 | struct sctp_association *asoc; |
f5bee0ad CH |
3524 | sctp_assoc_t assoc_id; |
3525 | u32 assoc_value; | |
70331571 | 3526 | |
219b99a9 | 3527 | if (optlen == sizeof(int)) { |
94f65193 | 3528 | pr_warn_ratelimited(DEPRECATED |
f916ec96 | 3529 | "%s (pid %d) " |
94f65193 | 3530 | "Use of int in max_burst socket option deprecated.\n" |
f916ec96 NH |
3531 | "Use struct sctp_assoc_value instead\n", |
3532 | current->comm, task_pid_nr(current)); | |
f5bee0ad CH |
3533 | assoc_id = SCTP_FUTURE_ASSOC; |
3534 | assoc_value = *((int *)params); | |
219b99a9 | 3535 | } else if (optlen == sizeof(struct sctp_assoc_value)) { |
f5bee0ad CH |
3536 | assoc_id = params->assoc_id; |
3537 | assoc_value = params->assoc_value; | |
219b99a9 | 3538 | } else |
70331571 VY |
3539 | return -EINVAL; |
3540 | ||
f5bee0ad CH |
3541 | asoc = sctp_id2assoc(sk, assoc_id); |
3542 | if (!asoc && assoc_id > SCTP_ALL_ASSOC && sctp_style(sk, UDP)) | |
e0651a0d | 3543 | return -EINVAL; |
219b99a9 | 3544 | |
e0651a0d | 3545 | if (asoc) { |
f5bee0ad | 3546 | asoc->max_burst = assoc_value; |
e0651a0d XL |
3547 | |
3548 | return 0; | |
3549 | } | |
3550 | ||
746bc215 | 3551 | if (sctp_style(sk, TCP)) |
f5bee0ad | 3552 | assoc_id = SCTP_FUTURE_ASSOC; |
746bc215 | 3553 | |
f5bee0ad CH |
3554 | if (assoc_id == SCTP_FUTURE_ASSOC || assoc_id == SCTP_ALL_ASSOC) |
3555 | sp->max_burst = assoc_value; | |
e0651a0d | 3556 | |
f5bee0ad | 3557 | if (assoc_id == SCTP_CURRENT_ASSOC || assoc_id == SCTP_ALL_ASSOC) |
e0651a0d | 3558 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) |
f5bee0ad | 3559 | asoc->max_burst = assoc_value; |
70331571 VY |
3560 | |
3561 | return 0; | |
3562 | } | |
3563 | ||
65b07e5d VY |
3564 | /* |
3565 | * 7.1.18. Add a chunk that must be authenticated (SCTP_AUTH_CHUNK) | |
3566 | * | |
3567 | * This set option adds a chunk type that the user is requesting to be | |
3568 | * received only in an authenticated way. Changes to the list of chunks | |
3569 | * will only effect future associations on the socket. | |
3570 | */ | |
3571 | static int sctp_setsockopt_auth_chunk(struct sock *sk, | |
88266d31 | 3572 | struct sctp_authchunk *val, |
b7058842 | 3573 | unsigned int optlen) |
65b07e5d | 3574 | { |
b14878cc | 3575 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d | 3576 | |
b14878cc | 3577 | if (!ep->auth_enable) |
5e739d17 VY |
3578 | return -EACCES; |
3579 | ||
65b07e5d VY |
3580 | if (optlen != sizeof(struct sctp_authchunk)) |
3581 | return -EINVAL; | |
65b07e5d | 3582 | |
88266d31 | 3583 | switch (val->sauth_chunk) { |
7fd71b1e JP |
3584 | case SCTP_CID_INIT: |
3585 | case SCTP_CID_INIT_ACK: | |
3586 | case SCTP_CID_SHUTDOWN_COMPLETE: | |
3587 | case SCTP_CID_AUTH: | |
3588 | return -EINVAL; | |
65b07e5d VY |
3589 | } |
3590 | ||
3591 | /* add this chunk id to the endpoint */ | |
88266d31 | 3592 | return sctp_auth_ep_add_chunkid(ep, val->sauth_chunk); |
65b07e5d VY |
3593 | } |
3594 | ||
3595 | /* | |
3596 | * 7.1.19. Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT) | |
3597 | * | |
3598 | * This option gets or sets the list of HMAC algorithms that the local | |
3599 | * endpoint requires the peer to use. | |
3600 | */ | |
3601 | static int sctp_setsockopt_hmac_ident(struct sock *sk, | |
3564ef44 | 3602 | struct sctp_hmacalgo *hmacs, |
b7058842 | 3603 | unsigned int optlen) |
65b07e5d | 3604 | { |
b14878cc | 3605 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
d9724055 | 3606 | u32 idents; |
65b07e5d | 3607 | |
b14878cc | 3608 | if (!ep->auth_enable) |
5e739d17 VY |
3609 | return -EACCES; |
3610 | ||
65b07e5d VY |
3611 | if (optlen < sizeof(struct sctp_hmacalgo)) |
3612 | return -EINVAL; | |
5960cefa MRL |
3613 | optlen = min_t(unsigned int, optlen, sizeof(struct sctp_hmacalgo) + |
3614 | SCTP_AUTH_NUM_HMACS * sizeof(u16)); | |
65b07e5d | 3615 | |
d9724055 VY |
3616 | idents = hmacs->shmac_num_idents; |
3617 | if (idents == 0 || idents > SCTP_AUTH_NUM_HMACS || | |
3564ef44 CH |
3618 | (idents * sizeof(u16)) > (optlen - sizeof(struct sctp_hmacalgo))) |
3619 | return -EINVAL; | |
65b07e5d | 3620 | |
3564ef44 | 3621 | return sctp_auth_ep_set_hmacs(ep, hmacs); |
65b07e5d VY |
3622 | } |
3623 | ||
3624 | /* | |
3625 | * 7.1.20. Set a shared key (SCTP_AUTH_KEY) | |
3626 | * | |
3627 | * This option will set a shared secret key which is used to build an | |
3628 | * association shared key. | |
3629 | */ | |
3630 | static int sctp_setsockopt_auth_key(struct sock *sk, | |
534d13d0 | 3631 | struct sctp_authkey *authkey, |
b7058842 | 3632 | unsigned int optlen) |
65b07e5d | 3633 | { |
b14878cc | 3634 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d | 3635 | struct sctp_association *asoc; |
7fb3be13 | 3636 | int ret = -EINVAL; |
65b07e5d VY |
3637 | |
3638 | if (optlen <= sizeof(struct sctp_authkey)) | |
3639 | return -EINVAL; | |
5960cefa MRL |
3640 | /* authkey->sca_keylength is u16, so optlen can't be bigger than |
3641 | * this. | |
3642 | */ | |
7fb3be13 | 3643 | optlen = min_t(unsigned int, optlen, USHRT_MAX + sizeof(*authkey)); |
65b07e5d | 3644 | |
7fb3be13 | 3645 | if (authkey->sca_keylength > optlen - sizeof(*authkey)) |
30c2235c | 3646 | goto out; |
30c2235c | 3647 | |
65b07e5d | 3648 | asoc = sctp_id2assoc(sk, authkey->sca_assoc_id); |
7fb3be13 XL |
3649 | if (!asoc && authkey->sca_assoc_id > SCTP_ALL_ASSOC && |
3650 | sctp_style(sk, UDP)) | |
65b07e5d | 3651 | goto out; |
7fb3be13 XL |
3652 | |
3653 | if (asoc) { | |
3654 | ret = sctp_auth_set_key(ep, asoc, authkey); | |
3655 | goto out; | |
3656 | } | |
3657 | ||
0685d6b7 XL |
3658 | if (sctp_style(sk, TCP)) |
3659 | authkey->sca_assoc_id = SCTP_FUTURE_ASSOC; | |
3660 | ||
7fb3be13 XL |
3661 | if (authkey->sca_assoc_id == SCTP_FUTURE_ASSOC || |
3662 | authkey->sca_assoc_id == SCTP_ALL_ASSOC) { | |
3663 | ret = sctp_auth_set_key(ep, asoc, authkey); | |
3664 | if (ret) | |
3665 | goto out; | |
3666 | } | |
3667 | ||
3668 | ret = 0; | |
3669 | ||
3670 | if (authkey->sca_assoc_id == SCTP_CURRENT_ASSOC || | |
3671 | authkey->sca_assoc_id == SCTP_ALL_ASSOC) { | |
3672 | list_for_each_entry(asoc, &ep->asocs, asocs) { | |
3673 | int res = sctp_auth_set_key(ep, asoc, authkey); | |
3674 | ||
3675 | if (res && !ret) | |
3676 | ret = res; | |
3677 | } | |
65b07e5d VY |
3678 | } |
3679 | ||
65b07e5d | 3680 | out: |
89fae01e | 3681 | memzero_explicit(authkey, optlen); |
65b07e5d VY |
3682 | return ret; |
3683 | } | |
3684 | ||
3685 | /* | |
3686 | * 7.1.21. Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY) | |
3687 | * | |
3688 | * This option will get or set the active shared key to be used to build | |
3689 | * the association shared key. | |
3690 | */ | |
3691 | static int sctp_setsockopt_active_key(struct sock *sk, | |
dcab0a7a | 3692 | struct sctp_authkeyid *val, |
b7058842 | 3693 | unsigned int optlen) |
65b07e5d | 3694 | { |
b14878cc | 3695 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d | 3696 | struct sctp_association *asoc; |
bf9fb6ad | 3697 | int ret = 0; |
65b07e5d VY |
3698 | |
3699 | if (optlen != sizeof(struct sctp_authkeyid)) | |
3700 | return -EINVAL; | |
65b07e5d | 3701 | |
dcab0a7a CH |
3702 | asoc = sctp_id2assoc(sk, val->scact_assoc_id); |
3703 | if (!asoc && val->scact_assoc_id > SCTP_ALL_ASSOC && | |
bf9fb6ad | 3704 | sctp_style(sk, UDP)) |
65b07e5d VY |
3705 | return -EINVAL; |
3706 | ||
bf9fb6ad | 3707 | if (asoc) |
dcab0a7a | 3708 | return sctp_auth_set_active_key(ep, asoc, val->scact_keynumber); |
bf9fb6ad | 3709 | |
06b39e85 | 3710 | if (sctp_style(sk, TCP)) |
dcab0a7a | 3711 | val->scact_assoc_id = SCTP_FUTURE_ASSOC; |
06b39e85 | 3712 | |
dcab0a7a CH |
3713 | if (val->scact_assoc_id == SCTP_FUTURE_ASSOC || |
3714 | val->scact_assoc_id == SCTP_ALL_ASSOC) { | |
3715 | ret = sctp_auth_set_active_key(ep, asoc, val->scact_keynumber); | |
bf9fb6ad XL |
3716 | if (ret) |
3717 | return ret; | |
3718 | } | |
3719 | ||
dcab0a7a CH |
3720 | if (val->scact_assoc_id == SCTP_CURRENT_ASSOC || |
3721 | val->scact_assoc_id == SCTP_ALL_ASSOC) { | |
bf9fb6ad XL |
3722 | list_for_each_entry(asoc, &ep->asocs, asocs) { |
3723 | int res = sctp_auth_set_active_key(ep, asoc, | |
dcab0a7a | 3724 | val->scact_keynumber); |
bf9fb6ad XL |
3725 | |
3726 | if (res && !ret) | |
3727 | ret = res; | |
3728 | } | |
3729 | } | |
3730 | ||
3731 | return ret; | |
65b07e5d VY |
3732 | } |
3733 | ||
3734 | /* | |
3735 | * 7.1.22. Delete a shared key (SCTP_AUTH_DELETE_KEY) | |
3736 | * | |
3737 | * This set option will delete a shared secret key from use. | |
3738 | */ | |
3739 | static int sctp_setsockopt_del_key(struct sock *sk, | |
97dc9f2e | 3740 | struct sctp_authkeyid *val, |
b7058842 | 3741 | unsigned int optlen) |
65b07e5d | 3742 | { |
b14878cc | 3743 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d | 3744 | struct sctp_association *asoc; |
3adcc300 | 3745 | int ret = 0; |
65b07e5d VY |
3746 | |
3747 | if (optlen != sizeof(struct sctp_authkeyid)) | |
3748 | return -EINVAL; | |
65b07e5d | 3749 | |
97dc9f2e CH |
3750 | asoc = sctp_id2assoc(sk, val->scact_assoc_id); |
3751 | if (!asoc && val->scact_assoc_id > SCTP_ALL_ASSOC && | |
3adcc300 | 3752 | sctp_style(sk, UDP)) |
65b07e5d VY |
3753 | return -EINVAL; |
3754 | ||
3adcc300 | 3755 | if (asoc) |
97dc9f2e | 3756 | return sctp_auth_del_key_id(ep, asoc, val->scact_keynumber); |
65b07e5d | 3757 | |
220675eb | 3758 | if (sctp_style(sk, TCP)) |
97dc9f2e | 3759 | val->scact_assoc_id = SCTP_FUTURE_ASSOC; |
220675eb | 3760 | |
97dc9f2e CH |
3761 | if (val->scact_assoc_id == SCTP_FUTURE_ASSOC || |
3762 | val->scact_assoc_id == SCTP_ALL_ASSOC) { | |
3763 | ret = sctp_auth_del_key_id(ep, asoc, val->scact_keynumber); | |
3adcc300 XL |
3764 | if (ret) |
3765 | return ret; | |
3766 | } | |
3767 | ||
97dc9f2e CH |
3768 | if (val->scact_assoc_id == SCTP_CURRENT_ASSOC || |
3769 | val->scact_assoc_id == SCTP_ALL_ASSOC) { | |
3adcc300 XL |
3770 | list_for_each_entry(asoc, &ep->asocs, asocs) { |
3771 | int res = sctp_auth_del_key_id(ep, asoc, | |
97dc9f2e | 3772 | val->scact_keynumber); |
3adcc300 XL |
3773 | |
3774 | if (res && !ret) | |
3775 | ret = res; | |
3776 | } | |
3777 | } | |
3778 | ||
3779 | return ret; | |
65b07e5d VY |
3780 | } |
3781 | ||
601590ec XL |
3782 | /* |
3783 | * 8.3.4 Deactivate a Shared Key (SCTP_AUTH_DEACTIVATE_KEY) | |
3784 | * | |
3785 | * This set option will deactivate a shared secret key. | |
3786 | */ | |
76b3d0c4 CH |
3787 | static int sctp_setsockopt_deactivate_key(struct sock *sk, |
3788 | struct sctp_authkeyid *val, | |
601590ec XL |
3789 | unsigned int optlen) |
3790 | { | |
3791 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; | |
601590ec | 3792 | struct sctp_association *asoc; |
2af66ff3 | 3793 | int ret = 0; |
601590ec | 3794 | |
601590ec XL |
3795 | if (optlen != sizeof(struct sctp_authkeyid)) |
3796 | return -EINVAL; | |
601590ec | 3797 | |
76b3d0c4 CH |
3798 | asoc = sctp_id2assoc(sk, val->scact_assoc_id); |
3799 | if (!asoc && val->scact_assoc_id > SCTP_ALL_ASSOC && | |
2af66ff3 | 3800 | sctp_style(sk, UDP)) |
601590ec XL |
3801 | return -EINVAL; |
3802 | ||
2af66ff3 | 3803 | if (asoc) |
76b3d0c4 | 3804 | return sctp_auth_deact_key_id(ep, asoc, val->scact_keynumber); |
2af66ff3 | 3805 | |
200f3a3b | 3806 | if (sctp_style(sk, TCP)) |
76b3d0c4 | 3807 | val->scact_assoc_id = SCTP_FUTURE_ASSOC; |
200f3a3b | 3808 | |
76b3d0c4 CH |
3809 | if (val->scact_assoc_id == SCTP_FUTURE_ASSOC || |
3810 | val->scact_assoc_id == SCTP_ALL_ASSOC) { | |
3811 | ret = sctp_auth_deact_key_id(ep, asoc, val->scact_keynumber); | |
2af66ff3 XL |
3812 | if (ret) |
3813 | return ret; | |
3814 | } | |
3815 | ||
76b3d0c4 CH |
3816 | if (val->scact_assoc_id == SCTP_CURRENT_ASSOC || |
3817 | val->scact_assoc_id == SCTP_ALL_ASSOC) { | |
2af66ff3 XL |
3818 | list_for_each_entry(asoc, &ep->asocs, asocs) { |
3819 | int res = sctp_auth_deact_key_id(ep, asoc, | |
76b3d0c4 | 3820 | val->scact_keynumber); |
2af66ff3 XL |
3821 | |
3822 | if (res && !ret) | |
3823 | ret = res; | |
3824 | } | |
3825 | } | |
3826 | ||
3827 | return ret; | |
601590ec XL |
3828 | } |
3829 | ||
7dc04d71 MH |
3830 | /* |
3831 | * 8.1.23 SCTP_AUTO_ASCONF | |
3832 | * | |
3833 | * This option will enable or disable the use of the automatic generation of | |
3834 | * ASCONF chunks to add and delete addresses to an existing association. Note | |
3835 | * that this option has two caveats namely: a) it only affects sockets that | |
3836 | * are bound to all addresses available to the SCTP stack, and b) the system | |
3837 | * administrator may have an overriding control that turns the ASCONF feature | |
3838 | * off no matter what setting the socket option may have. | |
3839 | * This option expects an integer boolean flag, where a non-zero value turns on | |
3840 | * the option, and a zero value turns off the option. | |
3841 | * Note. In this implementation, socket operation overrides default parameter | |
3842 | * being set by sysctl as well as FreeBSD implementation | |
3843 | */ | |
c9abc2c1 | 3844 | static int sctp_setsockopt_auto_asconf(struct sock *sk, int *val, |
7dc04d71 MH |
3845 | unsigned int optlen) |
3846 | { | |
7dc04d71 MH |
3847 | struct sctp_sock *sp = sctp_sk(sk); |
3848 | ||
3849 | if (optlen < sizeof(int)) | |
3850 | return -EINVAL; | |
c9abc2c1 | 3851 | if (!sctp_is_ep_boundall(sk) && *val) |
7dc04d71 | 3852 | return -EINVAL; |
c9abc2c1 | 3853 | if ((*val && sp->do_auto_asconf) || (!*val && !sp->do_auto_asconf)) |
7dc04d71 MH |
3854 | return 0; |
3855 | ||
2d45a02d | 3856 | spin_lock_bh(&sock_net(sk)->sctp.addr_wq_lock); |
c9abc2c1 | 3857 | if (*val == 0 && sp->do_auto_asconf) { |
7dc04d71 MH |
3858 | list_del(&sp->auto_asconf_list); |
3859 | sp->do_auto_asconf = 0; | |
c9abc2c1 | 3860 | } else if (*val && !sp->do_auto_asconf) { |
7dc04d71 | 3861 | list_add_tail(&sp->auto_asconf_list, |
4db67e80 | 3862 | &sock_net(sk)->sctp.auto_asconf_splist); |
7dc04d71 MH |
3863 | sp->do_auto_asconf = 1; |
3864 | } | |
2d45a02d | 3865 | spin_unlock_bh(&sock_net(sk)->sctp.addr_wq_lock); |
7dc04d71 MH |
3866 | return 0; |
3867 | } | |
3868 | ||
5aa93bcf NH |
3869 | /* |
3870 | * SCTP_PEER_ADDR_THLDS | |
3871 | * | |
3872 | * This option allows us to alter the partially failed threshold for one or all | |
3873 | * transports in an association. See Section 6.1 of: | |
3874 | * http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txt | |
3875 | */ | |
3876 | static int sctp_setsockopt_paddr_thresholds(struct sock *sk, | |
b0ac3bb8 | 3877 | struct sctp_paddrthlds_v2 *val, |
d467ac0a | 3878 | unsigned int optlen, bool v2) |
5aa93bcf | 3879 | { |
5aa93bcf NH |
3880 | struct sctp_transport *trans; |
3881 | struct sctp_association *asoc; | |
d467ac0a | 3882 | int len; |
5aa93bcf | 3883 | |
b0ac3bb8 | 3884 | len = v2 ? sizeof(*val) : sizeof(struct sctp_paddrthlds); |
d467ac0a | 3885 | if (optlen < len) |
5aa93bcf | 3886 | return -EINVAL; |
5aa93bcf | 3887 | |
b0ac3bb8 | 3888 | if (v2 && val->spt_pathpfthld > val->spt_pathcpthld) |
d467ac0a XL |
3889 | return -EINVAL; |
3890 | ||
b0ac3bb8 CH |
3891 | if (!sctp_is_any(sk, (const union sctp_addr *)&val->spt_address)) { |
3892 | trans = sctp_addr_id2transport(sk, &val->spt_address, | |
3893 | val->spt_assoc_id); | |
8add543e | 3894 | if (!trans) |
5aa93bcf | 3895 | return -ENOENT; |
8add543e | 3896 | |
b0ac3bb8 CH |
3897 | if (val->spt_pathmaxrxt) |
3898 | trans->pathmaxrxt = val->spt_pathmaxrxt; | |
d467ac0a | 3899 | if (v2) |
b0ac3bb8 CH |
3900 | trans->ps_retrans = val->spt_pathcpthld; |
3901 | trans->pf_retrans = val->spt_pathpfthld; | |
8add543e XL |
3902 | |
3903 | return 0; | |
3904 | } | |
3905 | ||
b0ac3bb8 CH |
3906 | asoc = sctp_id2assoc(sk, val->spt_assoc_id); |
3907 | if (!asoc && val->spt_assoc_id != SCTP_FUTURE_ASSOC && | |
8add543e XL |
3908 | sctp_style(sk, UDP)) |
3909 | return -EINVAL; | |
3910 | ||
3911 | if (asoc) { | |
5aa93bcf NH |
3912 | list_for_each_entry(trans, &asoc->peer.transport_addr_list, |
3913 | transports) { | |
b0ac3bb8 CH |
3914 | if (val->spt_pathmaxrxt) |
3915 | trans->pathmaxrxt = val->spt_pathmaxrxt; | |
d467ac0a | 3916 | if (v2) |
b0ac3bb8 CH |
3917 | trans->ps_retrans = val->spt_pathcpthld; |
3918 | trans->pf_retrans = val->spt_pathpfthld; | |
5aa93bcf NH |
3919 | } |
3920 | ||
b0ac3bb8 CH |
3921 | if (val->spt_pathmaxrxt) |
3922 | asoc->pathmaxrxt = val->spt_pathmaxrxt; | |
d467ac0a | 3923 | if (v2) |
b0ac3bb8 CH |
3924 | asoc->ps_retrans = val->spt_pathcpthld; |
3925 | asoc->pf_retrans = val->spt_pathpfthld; | |
5aa93bcf | 3926 | } else { |
8add543e | 3927 | struct sctp_sock *sp = sctp_sk(sk); |
5aa93bcf | 3928 | |
b0ac3bb8 CH |
3929 | if (val->spt_pathmaxrxt) |
3930 | sp->pathmaxrxt = val->spt_pathmaxrxt; | |
d467ac0a | 3931 | if (v2) |
b0ac3bb8 CH |
3932 | sp->ps_retrans = val->spt_pathcpthld; |
3933 | sp->pf_retrans = val->spt_pathpfthld; | |
5aa93bcf NH |
3934 | } |
3935 | ||
3936 | return 0; | |
3937 | } | |
3938 | ||
a98af7c8 | 3939 | static int sctp_setsockopt_recvrcvinfo(struct sock *sk, int *val, |
0d3a421d GOV |
3940 | unsigned int optlen) |
3941 | { | |
0d3a421d GOV |
3942 | if (optlen < sizeof(int)) |
3943 | return -EINVAL; | |
0d3a421d | 3944 | |
a98af7c8 | 3945 | sctp_sk(sk)->recvrcvinfo = (*val == 0) ? 0 : 1; |
0d3a421d GOV |
3946 | |
3947 | return 0; | |
3948 | } | |
3949 | ||
cfa6fde2 | 3950 | static int sctp_setsockopt_recvnxtinfo(struct sock *sk, int *val, |
2347c80f GOV |
3951 | unsigned int optlen) |
3952 | { | |
2347c80f GOV |
3953 | if (optlen < sizeof(int)) |
3954 | return -EINVAL; | |
2347c80f | 3955 | |
cfa6fde2 | 3956 | sctp_sk(sk)->recvnxtinfo = (*val == 0) ? 0 : 1; |
2347c80f GOV |
3957 | |
3958 | return 0; | |
3959 | } | |
3960 | ||
28aa4c26 | 3961 | static int sctp_setsockopt_pr_supported(struct sock *sk, |
4a97fa4f | 3962 | struct sctp_assoc_value *params, |
28aa4c26 XL |
3963 | unsigned int optlen) |
3964 | { | |
fb195605 | 3965 | struct sctp_association *asoc; |
28aa4c26 | 3966 | |
4a97fa4f | 3967 | if (optlen != sizeof(*params)) |
cc3ccf26 | 3968 | return -EINVAL; |
28aa4c26 | 3969 | |
4a97fa4f CH |
3970 | asoc = sctp_id2assoc(sk, params->assoc_id); |
3971 | if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC && | |
fb195605 XL |
3972 | sctp_style(sk, UDP)) |
3973 | return -EINVAL; | |
3974 | ||
4a97fa4f | 3975 | sctp_sk(sk)->ep->prsctp_enable = !!params->assoc_value; |
28aa4c26 | 3976 | |
cc3ccf26 | 3977 | return 0; |
28aa4c26 XL |
3978 | } |
3979 | ||
f959fb44 | 3980 | static int sctp_setsockopt_default_prinfo(struct sock *sk, |
ac37435b | 3981 | struct sctp_default_prinfo *info, |
f959fb44 XL |
3982 | unsigned int optlen) |
3983 | { | |
3a583059 | 3984 | struct sctp_sock *sp = sctp_sk(sk); |
f959fb44 XL |
3985 | struct sctp_association *asoc; |
3986 | int retval = -EINVAL; | |
3987 | ||
ac37435b | 3988 | if (optlen != sizeof(*info)) |
f959fb44 | 3989 | goto out; |
f959fb44 | 3990 | |
ac37435b | 3991 | if (info->pr_policy & ~SCTP_PR_SCTP_MASK) |
f959fb44 XL |
3992 | goto out; |
3993 | ||
ac37435b CH |
3994 | if (info->pr_policy == SCTP_PR_SCTP_NONE) |
3995 | info->pr_value = 0; | |
f959fb44 | 3996 | |
ac37435b CH |
3997 | asoc = sctp_id2assoc(sk, info->pr_assoc_id); |
3998 | if (!asoc && info->pr_assoc_id > SCTP_ALL_ASSOC && | |
3a583059 XL |
3999 | sctp_style(sk, UDP)) |
4000 | goto out; | |
4001 | ||
4002 | retval = 0; | |
4003 | ||
f959fb44 | 4004 | if (asoc) { |
ac37435b CH |
4005 | SCTP_PR_SET_POLICY(asoc->default_flags, info->pr_policy); |
4006 | asoc->default_timetolive = info->pr_value; | |
3a583059 XL |
4007 | goto out; |
4008 | } | |
f959fb44 | 4009 | |
cbb45c6c | 4010 | if (sctp_style(sk, TCP)) |
ac37435b | 4011 | info->pr_assoc_id = SCTP_FUTURE_ASSOC; |
cbb45c6c | 4012 | |
ac37435b CH |
4013 | if (info->pr_assoc_id == SCTP_FUTURE_ASSOC || |
4014 | info->pr_assoc_id == SCTP_ALL_ASSOC) { | |
4015 | SCTP_PR_SET_POLICY(sp->default_flags, info->pr_policy); | |
4016 | sp->default_timetolive = info->pr_value; | |
f959fb44 XL |
4017 | } |
4018 | ||
ac37435b CH |
4019 | if (info->pr_assoc_id == SCTP_CURRENT_ASSOC || |
4020 | info->pr_assoc_id == SCTP_ALL_ASSOC) { | |
3a583059 | 4021 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) { |
ac37435b CH |
4022 | SCTP_PR_SET_POLICY(asoc->default_flags, |
4023 | info->pr_policy); | |
4024 | asoc->default_timetolive = info->pr_value; | |
3a583059 XL |
4025 | } |
4026 | } | |
f959fb44 XL |
4027 | |
4028 | out: | |
4029 | return retval; | |
4030 | } | |
4031 | ||
c0d8bab6 | 4032 | static int sctp_setsockopt_reconfig_supported(struct sock *sk, |
3f49f720 | 4033 | struct sctp_assoc_value *params, |
c0d8bab6 XL |
4034 | unsigned int optlen) |
4035 | { | |
c0d8bab6 XL |
4036 | struct sctp_association *asoc; |
4037 | int retval = -EINVAL; | |
4038 | ||
3f49f720 | 4039 | if (optlen != sizeof(*params)) |
c0d8bab6 | 4040 | goto out; |
c0d8bab6 | 4041 | |
3f49f720 CH |
4042 | asoc = sctp_id2assoc(sk, params->assoc_id); |
4043 | if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC && | |
acce7f3b | 4044 | sctp_style(sk, UDP)) |
c0d8bab6 | 4045 | goto out; |
acce7f3b | 4046 | |
3f49f720 | 4047 | sctp_sk(sk)->ep->reconf_enable = !!params->assoc_value; |
c0d8bab6 XL |
4048 | |
4049 | retval = 0; | |
4050 | ||
4051 | out: | |
4052 | return retval; | |
4053 | } | |
4054 | ||
9fb657ae | 4055 | static int sctp_setsockopt_enable_strreset(struct sock *sk, |
356dc6f1 | 4056 | struct sctp_assoc_value *params, |
9fb657ae XL |
4057 | unsigned int optlen) |
4058 | { | |
99a62135 | 4059 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
9fb657ae XL |
4060 | struct sctp_association *asoc; |
4061 | int retval = -EINVAL; | |
4062 | ||
356dc6f1 | 4063 | if (optlen != sizeof(*params)) |
9fb657ae | 4064 | goto out; |
9fb657ae | 4065 | |
356dc6f1 | 4066 | if (params->assoc_value & (~SCTP_ENABLE_STRRESET_MASK)) |
9fb657ae XL |
4067 | goto out; |
4068 | ||
356dc6f1 CH |
4069 | asoc = sctp_id2assoc(sk, params->assoc_id); |
4070 | if (!asoc && params->assoc_id > SCTP_ALL_ASSOC && | |
99a62135 XL |
4071 | sctp_style(sk, UDP)) |
4072 | goto out; | |
4073 | ||
4074 | retval = 0; | |
4075 | ||
9fb657ae | 4076 | if (asoc) { |
356dc6f1 | 4077 | asoc->strreset_enable = params->assoc_value; |
9fb657ae XL |
4078 | goto out; |
4079 | } | |
4080 | ||
9430ff99 | 4081 | if (sctp_style(sk, TCP)) |
356dc6f1 | 4082 | params->assoc_id = SCTP_FUTURE_ASSOC; |
9430ff99 | 4083 | |
356dc6f1 CH |
4084 | if (params->assoc_id == SCTP_FUTURE_ASSOC || |
4085 | params->assoc_id == SCTP_ALL_ASSOC) | |
4086 | ep->strreset_enable = params->assoc_value; | |
99a62135 | 4087 | |
356dc6f1 CH |
4088 | if (params->assoc_id == SCTP_CURRENT_ASSOC || |
4089 | params->assoc_id == SCTP_ALL_ASSOC) | |
99a62135 | 4090 | list_for_each_entry(asoc, &ep->asocs, asocs) |
356dc6f1 | 4091 | asoc->strreset_enable = params->assoc_value; |
9fb657ae XL |
4092 | |
4093 | out: | |
4094 | return retval; | |
4095 | } | |
4096 | ||
7f9d68ac | 4097 | static int sctp_setsockopt_reset_streams(struct sock *sk, |
d4922434 | 4098 | struct sctp_reset_streams *params, |
7f9d68ac XL |
4099 | unsigned int optlen) |
4100 | { | |
7f9d68ac | 4101 | struct sctp_association *asoc; |
7f9d68ac | 4102 | |
2342b8d9 | 4103 | if (optlen < sizeof(*params)) |
7f9d68ac | 4104 | return -EINVAL; |
5960cefa MRL |
4105 | /* srs_number_streams is u16, so optlen can't be bigger than this. */ |
4106 | optlen = min_t(unsigned int, optlen, USHRT_MAX + | |
4107 | sizeof(__u16) * sizeof(*params)); | |
7f9d68ac | 4108 | |
2342b8d9 XL |
4109 | if (params->srs_number_streams * sizeof(__u16) > |
4110 | optlen - sizeof(*params)) | |
d4922434 | 4111 | return -EINVAL; |
2342b8d9 | 4112 | |
7f9d68ac XL |
4113 | asoc = sctp_id2assoc(sk, params->srs_assoc_id); |
4114 | if (!asoc) | |
d4922434 | 4115 | return -EINVAL; |
7f9d68ac | 4116 | |
d4922434 | 4117 | return sctp_send_reset_streams(asoc, params); |
7f9d68ac XL |
4118 | } |
4119 | ||
b97d20ce | 4120 | static int sctp_setsockopt_reset_assoc(struct sock *sk, sctp_assoc_t *associd, |
a92ce1a4 XL |
4121 | unsigned int optlen) |
4122 | { | |
4123 | struct sctp_association *asoc; | |
a92ce1a4 | 4124 | |
b97d20ce CH |
4125 | if (optlen != sizeof(*associd)) |
4126 | return -EINVAL; | |
a92ce1a4 | 4127 | |
b97d20ce | 4128 | asoc = sctp_id2assoc(sk, *associd); |
a92ce1a4 | 4129 | if (!asoc) |
b97d20ce | 4130 | return -EINVAL; |
a92ce1a4 | 4131 | |
b97d20ce | 4132 | return sctp_send_reset_assoc(asoc); |
a92ce1a4 XL |
4133 | } |
4134 | ||
242bd2d5 | 4135 | static int sctp_setsockopt_add_streams(struct sock *sk, |
4d6fb260 | 4136 | struct sctp_add_streams *params, |
242bd2d5 XL |
4137 | unsigned int optlen) |
4138 | { | |
4139 | struct sctp_association *asoc; | |
242bd2d5 | 4140 | |
4d6fb260 CH |
4141 | if (optlen != sizeof(*params)) |
4142 | return -EINVAL; | |
242bd2d5 | 4143 | |
4d6fb260 | 4144 | asoc = sctp_id2assoc(sk, params->sas_assoc_id); |
242bd2d5 | 4145 | if (!asoc) |
4d6fb260 | 4146 | return -EINVAL; |
242bd2d5 | 4147 | |
4d6fb260 | 4148 | return sctp_send_add_streams(asoc, params); |
242bd2d5 XL |
4149 | } |
4150 | ||
13aa8770 | 4151 | static int sctp_setsockopt_scheduler(struct sock *sk, |
4d2fba3a | 4152 | struct sctp_assoc_value *params, |
13aa8770 MRL |
4153 | unsigned int optlen) |
4154 | { | |
7efba10d | 4155 | struct sctp_sock *sp = sctp_sk(sk); |
13aa8770 | 4156 | struct sctp_association *asoc; |
7efba10d | 4157 | int retval = 0; |
13aa8770 | 4158 | |
4d2fba3a | 4159 | if (optlen < sizeof(*params)) |
7efba10d | 4160 | return -EINVAL; |
13aa8770 | 4161 | |
4d2fba3a | 4162 | if (params->assoc_value > SCTP_SS_MAX) |
7efba10d | 4163 | return -EINVAL; |
13aa8770 | 4164 | |
4d2fba3a CH |
4165 | asoc = sctp_id2assoc(sk, params->assoc_id); |
4166 | if (!asoc && params->assoc_id > SCTP_ALL_ASSOC && | |
7efba10d XL |
4167 | sctp_style(sk, UDP)) |
4168 | return -EINVAL; | |
13aa8770 | 4169 | |
7efba10d | 4170 | if (asoc) |
4d2fba3a | 4171 | return sctp_sched_set_sched(asoc, params->assoc_value); |
7efba10d | 4172 | |
b59c19d9 | 4173 | if (sctp_style(sk, TCP)) |
4d2fba3a | 4174 | params->assoc_id = SCTP_FUTURE_ASSOC; |
b59c19d9 | 4175 | |
4d2fba3a CH |
4176 | if (params->assoc_id == SCTP_FUTURE_ASSOC || |
4177 | params->assoc_id == SCTP_ALL_ASSOC) | |
4178 | sp->default_ss = params->assoc_value; | |
7efba10d | 4179 | |
4d2fba3a CH |
4180 | if (params->assoc_id == SCTP_CURRENT_ASSOC || |
4181 | params->assoc_id == SCTP_ALL_ASSOC) { | |
7efba10d XL |
4182 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) { |
4183 | int ret = sctp_sched_set_sched(asoc, | |
4d2fba3a | 4184 | params->assoc_value); |
7efba10d XL |
4185 | |
4186 | if (ret && !retval) | |
4187 | retval = ret; | |
4188 | } | |
4189 | } | |
13aa8770 | 4190 | |
13aa8770 MRL |
4191 | return retval; |
4192 | } | |
4193 | ||
0ccdf3c7 | 4194 | static int sctp_setsockopt_scheduler_value(struct sock *sk, |
d636e7f3 | 4195 | struct sctp_stream_value *params, |
0ccdf3c7 MRL |
4196 | unsigned int optlen) |
4197 | { | |
e7f28248 | 4198 | struct sctp_association *asoc; |
0ccdf3c7 MRL |
4199 | int retval = -EINVAL; |
4200 | ||
d636e7f3 | 4201 | if (optlen < sizeof(*params)) |
0ccdf3c7 | 4202 | goto out; |
0ccdf3c7 | 4203 | |
d636e7f3 CH |
4204 | asoc = sctp_id2assoc(sk, params->assoc_id); |
4205 | if (!asoc && params->assoc_id != SCTP_CURRENT_ASSOC && | |
e7f28248 | 4206 | sctp_style(sk, UDP)) |
0ccdf3c7 MRL |
4207 | goto out; |
4208 | ||
e7f28248 | 4209 | if (asoc) { |
d636e7f3 CH |
4210 | retval = sctp_sched_set_value(asoc, params->stream_id, |
4211 | params->stream_value, GFP_KERNEL); | |
e7f28248 XL |
4212 | goto out; |
4213 | } | |
4214 | ||
4215 | retval = 0; | |
4216 | ||
4217 | list_for_each_entry(asoc, &sctp_sk(sk)->ep->asocs, asocs) { | |
d636e7f3 CH |
4218 | int ret = sctp_sched_set_value(asoc, params->stream_id, |
4219 | params->stream_value, | |
4220 | GFP_KERNEL); | |
e7f28248 XL |
4221 | if (ret && !retval) /* try to return the 1st error. */ |
4222 | retval = ret; | |
4223 | } | |
0ccdf3c7 MRL |
4224 | |
4225 | out: | |
4226 | return retval; | |
4227 | } | |
4228 | ||
772a5869 | 4229 | static int sctp_setsockopt_interleaving_supported(struct sock *sk, |
5b8d3b24 | 4230 | struct sctp_assoc_value *p, |
772a5869 XL |
4231 | unsigned int optlen) |
4232 | { | |
4233 | struct sctp_sock *sp = sctp_sk(sk); | |
2e7709d1 | 4234 | struct sctp_association *asoc; |
772a5869 | 4235 | |
5b8d3b24 CH |
4236 | if (optlen < sizeof(*p)) |
4237 | return -EINVAL; | |
772a5869 | 4238 | |
5b8d3b24 CH |
4239 | asoc = sctp_id2assoc(sk, p->assoc_id); |
4240 | if (!asoc && p->assoc_id != SCTP_FUTURE_ASSOC && sctp_style(sk, UDP)) | |
4241 | return -EINVAL; | |
772a5869 | 4242 | |
2e7709d1 | 4243 | if (!sock_net(sk)->sctp.intl_enable || !sp->frag_interleave) { |
5b8d3b24 | 4244 | return -EPERM; |
772a5869 XL |
4245 | } |
4246 | ||
5b8d3b24 CH |
4247 | sp->ep->intl_enable = !!p->assoc_value; |
4248 | return 0; | |
772a5869 XL |
4249 | } |
4250 | ||
a4262466 | 4251 | static int sctp_setsockopt_reuse_port(struct sock *sk, int *val, |
b0e9a2fe XL |
4252 | unsigned int optlen) |
4253 | { | |
b0e9a2fe XL |
4254 | if (!sctp_style(sk, TCP)) |
4255 | return -EOPNOTSUPP; | |
4256 | ||
4257 | if (sctp_sk(sk)->ep->base.bind_addr.port) | |
4258 | return -EFAULT; | |
4259 | ||
4260 | if (optlen < sizeof(int)) | |
4261 | return -EINVAL; | |
4262 | ||
a4262466 | 4263 | sctp_sk(sk)->reuse = !!*val; |
b0e9a2fe XL |
4264 | |
4265 | return 0; | |
4266 | } | |
4267 | ||
d251f05e XL |
4268 | static int sctp_assoc_ulpevent_type_set(struct sctp_event *param, |
4269 | struct sctp_association *asoc) | |
4270 | { | |
4271 | struct sctp_ulpevent *event; | |
4272 | ||
4273 | sctp_ulpevent_type_set(&asoc->subscribe, param->se_type, param->se_on); | |
4274 | ||
4275 | if (param->se_type == SCTP_SENDER_DRY_EVENT && param->se_on) { | |
4276 | if (sctp_outq_is_empty(&asoc->outqueue)) { | |
4277 | event = sctp_ulpevent_make_sender_dry_event(asoc, | |
4278 | GFP_USER | __GFP_NOWARN); | |
4279 | if (!event) | |
4280 | return -ENOMEM; | |
4281 | ||
4282 | asoc->stream.si->enqueue_event(&asoc->ulpq, event); | |
4283 | } | |
4284 | } | |
4285 | ||
4286 | return 0; | |
4287 | } | |
4288 | ||
565059cb | 4289 | static int sctp_setsockopt_event(struct sock *sk, struct sctp_event *param, |
480ba9c1 XL |
4290 | unsigned int optlen) |
4291 | { | |
d251f05e | 4292 | struct sctp_sock *sp = sctp_sk(sk); |
480ba9c1 | 4293 | struct sctp_association *asoc; |
480ba9c1 XL |
4294 | int retval = 0; |
4295 | ||
565059cb | 4296 | if (optlen < sizeof(*param)) |
d251f05e | 4297 | return -EINVAL; |
480ba9c1 | 4298 | |
565059cb CH |
4299 | if (param->se_type < SCTP_SN_TYPE_BASE || |
4300 | param->se_type > SCTP_SN_TYPE_MAX) | |
d251f05e | 4301 | return -EINVAL; |
480ba9c1 | 4302 | |
565059cb CH |
4303 | asoc = sctp_id2assoc(sk, param->se_assoc_id); |
4304 | if (!asoc && param->se_assoc_id > SCTP_ALL_ASSOC && | |
d251f05e XL |
4305 | sctp_style(sk, UDP)) |
4306 | return -EINVAL; | |
480ba9c1 | 4307 | |
d251f05e | 4308 | if (asoc) |
565059cb | 4309 | return sctp_assoc_ulpevent_type_set(param, asoc); |
480ba9c1 | 4310 | |
99518619 | 4311 | if (sctp_style(sk, TCP)) |
565059cb | 4312 | param->se_assoc_id = SCTP_FUTURE_ASSOC; |
99518619 | 4313 | |
565059cb CH |
4314 | if (param->se_assoc_id == SCTP_FUTURE_ASSOC || |
4315 | param->se_assoc_id == SCTP_ALL_ASSOC) | |
d251f05e | 4316 | sctp_ulpevent_type_set(&sp->subscribe, |
565059cb | 4317 | param->se_type, param->se_on); |
480ba9c1 | 4318 | |
565059cb CH |
4319 | if (param->se_assoc_id == SCTP_CURRENT_ASSOC || |
4320 | param->se_assoc_id == SCTP_ALL_ASSOC) { | |
d251f05e | 4321 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) { |
565059cb | 4322 | int ret = sctp_assoc_ulpevent_type_set(param, asoc); |
d251f05e XL |
4323 | |
4324 | if (ret && !retval) | |
4325 | retval = ret; | |
480ba9c1 XL |
4326 | } |
4327 | } | |
4328 | ||
480ba9c1 XL |
4329 | return retval; |
4330 | } | |
4331 | ||
df2c71ff | 4332 | static int sctp_setsockopt_asconf_supported(struct sock *sk, |
9263ac97 | 4333 | struct sctp_assoc_value *params, |
df2c71ff XL |
4334 | unsigned int optlen) |
4335 | { | |
df2c71ff XL |
4336 | struct sctp_association *asoc; |
4337 | struct sctp_endpoint *ep; | |
4338 | int retval = -EINVAL; | |
4339 | ||
9263ac97 | 4340 | if (optlen != sizeof(*params)) |
df2c71ff | 4341 | goto out; |
df2c71ff | 4342 | |
9263ac97 CH |
4343 | asoc = sctp_id2assoc(sk, params->assoc_id); |
4344 | if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC && | |
df2c71ff XL |
4345 | sctp_style(sk, UDP)) |
4346 | goto out; | |
4347 | ||
4348 | ep = sctp_sk(sk)->ep; | |
9263ac97 | 4349 | ep->asconf_enable = !!params->assoc_value; |
df2c71ff XL |
4350 | |
4351 | if (ep->asconf_enable && ep->auth_enable) { | |
4352 | sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF); | |
4353 | sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF_ACK); | |
4354 | } | |
4355 | ||
4356 | retval = 0; | |
4357 | ||
4358 | out: | |
4359 | return retval; | |
4360 | } | |
4361 | ||
56dd525a | 4362 | static int sctp_setsockopt_auth_supported(struct sock *sk, |
963855a9 | 4363 | struct sctp_assoc_value *params, |
56dd525a XL |
4364 | unsigned int optlen) |
4365 | { | |
56dd525a XL |
4366 | struct sctp_association *asoc; |
4367 | struct sctp_endpoint *ep; | |
4368 | int retval = -EINVAL; | |
4369 | ||
963855a9 | 4370 | if (optlen != sizeof(*params)) |
56dd525a | 4371 | goto out; |
56dd525a | 4372 | |
963855a9 CH |
4373 | asoc = sctp_id2assoc(sk, params->assoc_id); |
4374 | if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC && | |
56dd525a XL |
4375 | sctp_style(sk, UDP)) |
4376 | goto out; | |
4377 | ||
4378 | ep = sctp_sk(sk)->ep; | |
963855a9 | 4379 | if (params->assoc_value) { |
56dd525a XL |
4380 | retval = sctp_auth_init(ep, GFP_KERNEL); |
4381 | if (retval) | |
4382 | goto out; | |
4383 | if (ep->asconf_enable) { | |
4384 | sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF); | |
4385 | sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF_ACK); | |
4386 | } | |
4387 | } | |
4388 | ||
963855a9 | 4389 | ep->auth_enable = !!params->assoc_value; |
56dd525a XL |
4390 | retval = 0; |
4391 | ||
4392 | out: | |
4393 | return retval; | |
4394 | } | |
4395 | ||
d5886b91 | 4396 | static int sctp_setsockopt_ecn_supported(struct sock *sk, |
92c4f172 | 4397 | struct sctp_assoc_value *params, |
d5886b91 XL |
4398 | unsigned int optlen) |
4399 | { | |
d5886b91 XL |
4400 | struct sctp_association *asoc; |
4401 | int retval = -EINVAL; | |
4402 | ||
92c4f172 | 4403 | if (optlen != sizeof(*params)) |
d5886b91 | 4404 | goto out; |
d5886b91 | 4405 | |
92c4f172 CH |
4406 | asoc = sctp_id2assoc(sk, params->assoc_id); |
4407 | if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC && | |
d5886b91 XL |
4408 | sctp_style(sk, UDP)) |
4409 | goto out; | |
4410 | ||
92c4f172 | 4411 | sctp_sk(sk)->ep->ecn_enable = !!params->assoc_value; |
d5886b91 XL |
4412 | retval = 0; |
4413 | ||
4414 | out: | |
4415 | return retval; | |
4416 | } | |
4417 | ||
8d2a6935 | 4418 | static int sctp_setsockopt_pf_expose(struct sock *sk, |
26feba80 | 4419 | struct sctp_assoc_value *params, |
8d2a6935 XL |
4420 | unsigned int optlen) |
4421 | { | |
8d2a6935 XL |
4422 | struct sctp_association *asoc; |
4423 | int retval = -EINVAL; | |
4424 | ||
26feba80 | 4425 | if (optlen != sizeof(*params)) |
8d2a6935 | 4426 | goto out; |
8d2a6935 | 4427 | |
26feba80 | 4428 | if (params->assoc_value > SCTP_PF_EXPOSE_MAX) |
8d2a6935 XL |
4429 | goto out; |
4430 | ||
26feba80 CH |
4431 | asoc = sctp_id2assoc(sk, params->assoc_id); |
4432 | if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC && | |
8d2a6935 XL |
4433 | sctp_style(sk, UDP)) |
4434 | goto out; | |
4435 | ||
4436 | if (asoc) | |
26feba80 | 4437 | asoc->pf_expose = params->assoc_value; |
8d2a6935 | 4438 | else |
26feba80 | 4439 | sctp_sk(sk)->pf_expose = params->assoc_value; |
8d2a6935 XL |
4440 | retval = 0; |
4441 | ||
4442 | out: | |
4443 | return retval; | |
4444 | } | |
4445 | ||
8dba2960 XL |
4446 | static int sctp_setsockopt_encap_port(struct sock *sk, |
4447 | struct sctp_udpencaps *encap, | |
4448 | unsigned int optlen) | |
4449 | { | |
4450 | struct sctp_association *asoc; | |
4451 | struct sctp_transport *t; | |
4452 | __be16 encap_port; | |
4453 | ||
4454 | if (optlen != sizeof(*encap)) | |
4455 | return -EINVAL; | |
4456 | ||
4457 | /* If an address other than INADDR_ANY is specified, and | |
4458 | * no transport is found, then the request is invalid. | |
4459 | */ | |
4460 | encap_port = (__force __be16)encap->sue_port; | |
4461 | if (!sctp_is_any(sk, (union sctp_addr *)&encap->sue_address)) { | |
4462 | t = sctp_addr_id2transport(sk, &encap->sue_address, | |
4463 | encap->sue_assoc_id); | |
4464 | if (!t) | |
4465 | return -EINVAL; | |
4466 | ||
4467 | t->encap_port = encap_port; | |
4468 | return 0; | |
4469 | } | |
4470 | ||
4471 | /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the | |
4472 | * socket is a one to many style socket, and an association | |
4473 | * was not found, then the id was invalid. | |
4474 | */ | |
4475 | asoc = sctp_id2assoc(sk, encap->sue_assoc_id); | |
4476 | if (!asoc && encap->sue_assoc_id != SCTP_FUTURE_ASSOC && | |
4477 | sctp_style(sk, UDP)) | |
4478 | return -EINVAL; | |
4479 | ||
4480 | /* If changes are for association, also apply encap_port to | |
4481 | * each transport. | |
4482 | */ | |
4483 | if (asoc) { | |
4484 | list_for_each_entry(t, &asoc->peer.transport_addr_list, | |
4485 | transports) | |
4486 | t->encap_port = encap_port; | |
4487 | ||
297739bd | 4488 | asoc->encap_port = encap_port; |
8dba2960 XL |
4489 | return 0; |
4490 | } | |
4491 | ||
4492 | sctp_sk(sk)->encap_port = encap_port; | |
4493 | return 0; | |
4494 | } | |
4495 | ||
3190b649 XL |
4496 | static int sctp_setsockopt_probe_interval(struct sock *sk, |
4497 | struct sctp_probeinterval *params, | |
4498 | unsigned int optlen) | |
4499 | { | |
4500 | struct sctp_association *asoc; | |
4501 | struct sctp_transport *t; | |
4502 | __u32 probe_interval; | |
4503 | ||
4504 | if (optlen != sizeof(*params)) | |
4505 | return -EINVAL; | |
4506 | ||
4507 | probe_interval = params->spi_interval; | |
4508 | if (probe_interval && probe_interval < SCTP_PROBE_TIMER_MIN) | |
4509 | return -EINVAL; | |
4510 | ||
4511 | /* If an address other than INADDR_ANY is specified, and | |
4512 | * no transport is found, then the request is invalid. | |
4513 | */ | |
4514 | if (!sctp_is_any(sk, (union sctp_addr *)¶ms->spi_address)) { | |
4515 | t = sctp_addr_id2transport(sk, ¶ms->spi_address, | |
4516 | params->spi_assoc_id); | |
4517 | if (!t) | |
4518 | return -EINVAL; | |
4519 | ||
4520 | t->probe_interval = msecs_to_jiffies(probe_interval); | |
7307e4fa | 4521 | sctp_transport_pl_reset(t); |
3190b649 XL |
4522 | return 0; |
4523 | } | |
4524 | ||
4525 | /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the | |
4526 | * socket is a one to many style socket, and an association | |
4527 | * was not found, then the id was invalid. | |
4528 | */ | |
4529 | asoc = sctp_id2assoc(sk, params->spi_assoc_id); | |
4530 | if (!asoc && params->spi_assoc_id != SCTP_FUTURE_ASSOC && | |
4531 | sctp_style(sk, UDP)) | |
4532 | return -EINVAL; | |
4533 | ||
4534 | /* If changes are for association, also apply probe_interval to | |
4535 | * each transport. | |
4536 | */ | |
4537 | if (asoc) { | |
7307e4fa | 4538 | list_for_each_entry(t, &asoc->peer.transport_addr_list, transports) { |
3190b649 | 4539 | t->probe_interval = msecs_to_jiffies(probe_interval); |
7307e4fa XL |
4540 | sctp_transport_pl_reset(t); |
4541 | } | |
3190b649 XL |
4542 | |
4543 | asoc->probe_interval = msecs_to_jiffies(probe_interval); | |
4544 | return 0; | |
4545 | } | |
4546 | ||
4547 | sctp_sk(sk)->probe_interval = probe_interval; | |
4548 | return 0; | |
4549 | } | |
4550 | ||
1da177e4 LT |
4551 | /* API 6.2 setsockopt(), getsockopt() |
4552 | * | |
4553 | * Applications use setsockopt() and getsockopt() to set or retrieve | |
4554 | * socket options. Socket options are used to change the default | |
4555 | * behavior of sockets calls. They are described in Section 7. | |
4556 | * | |
4557 | * The syntax is: | |
4558 | * | |
4559 | * ret = getsockopt(int sd, int level, int optname, void __user *optval, | |
4560 | * int __user *optlen); | |
4561 | * ret = setsockopt(int sd, int level, int optname, const void __user *optval, | |
4562 | * int optlen); | |
4563 | * | |
4564 | * sd - the socket descript. | |
4565 | * level - set to IPPROTO_SCTP for all SCTP options. | |
4566 | * optname - the option name. | |
4567 | * optval - the buffer to store the value of the option. | |
4568 | * optlen - the size of the buffer. | |
4569 | */ | |
dda91928 | 4570 | static int sctp_setsockopt(struct sock *sk, int level, int optname, |
a7b75c5a | 4571 | sockptr_t optval, unsigned int optlen) |
1da177e4 | 4572 | { |
ca84bd05 | 4573 | void *kopt = NULL; |
1da177e4 LT |
4574 | int retval = 0; |
4575 | ||
bb33381d | 4576 | pr_debug("%s: sk:%p, optname:%d\n", __func__, sk, optname); |
1da177e4 LT |
4577 | |
4578 | /* I can hardly begin to describe how wrong this is. This is | |
4579 | * so broken as to be worse than useless. The API draft | |
4580 | * REALLY is NOT helpful here... I am not convinced that the | |
4581 | * semantics of setsockopt() with a level OTHER THAN SOL_SCTP | |
4582 | * are at all well-founded. | |
4583 | */ | |
4584 | if (level != SOL_SCTP) { | |
4585 | struct sctp_af *af = sctp_sk(sk)->pf->af; | |
6c8983a6 CH |
4586 | |
4587 | return af->setsockopt(sk, level, optname, optval, optlen); | |
1da177e4 LT |
4588 | } |
4589 | ||
ca84bd05 | 4590 | if (optlen > 0) { |
2f3fdd8d XL |
4591 | /* Trim it to the biggest size sctp sockopt may need if necessary */ |
4592 | optlen = min_t(unsigned int, optlen, | |
4593 | PAGE_ALIGN(USHRT_MAX + | |
4594 | sizeof(__u16) * sizeof(struct sctp_reset_streams))); | |
a7b75c5a | 4595 | kopt = memdup_sockptr(optval, optlen); |
ca84bd05 CH |
4596 | if (IS_ERR(kopt)) |
4597 | return PTR_ERR(kopt); | |
4598 | } | |
4599 | ||
048ed4b6 | 4600 | lock_sock(sk); |
1da177e4 LT |
4601 | |
4602 | switch (optname) { | |
4603 | case SCTP_SOCKOPT_BINDX_ADD: | |
4604 | /* 'optlen' is the size of the addresses buffer. */ | |
8c7517f5 CH |
4605 | retval = sctp_setsockopt_bindx(sk, kopt, optlen, |
4606 | SCTP_BINDX_ADD_ADDR); | |
1da177e4 LT |
4607 | break; |
4608 | ||
4609 | case SCTP_SOCKOPT_BINDX_REM: | |
4610 | /* 'optlen' is the size of the addresses buffer. */ | |
8c7517f5 CH |
4611 | retval = sctp_setsockopt_bindx(sk, kopt, optlen, |
4612 | SCTP_BINDX_REM_ADDR); | |
1da177e4 LT |
4613 | break; |
4614 | ||
88a0a948 VY |
4615 | case SCTP_SOCKOPT_CONNECTX_OLD: |
4616 | /* 'optlen' is the size of the addresses buffer. */ | |
ce5b2f89 | 4617 | retval = sctp_setsockopt_connectx_old(sk, kopt, optlen); |
88a0a948 VY |
4618 | break; |
4619 | ||
3f7a87d2 FF |
4620 | case SCTP_SOCKOPT_CONNECTX: |
4621 | /* 'optlen' is the size of the addresses buffer. */ | |
ce5b2f89 | 4622 | retval = sctp_setsockopt_connectx(sk, kopt, optlen); |
3f7a87d2 FF |
4623 | break; |
4624 | ||
1da177e4 | 4625 | case SCTP_DISABLE_FRAGMENTS: |
10835825 | 4626 | retval = sctp_setsockopt_disable_fragments(sk, kopt, optlen); |
1da177e4 LT |
4627 | break; |
4628 | ||
4629 | case SCTP_EVENTS: | |
a98d21a1 | 4630 | retval = sctp_setsockopt_events(sk, kopt, optlen); |
1da177e4 LT |
4631 | break; |
4632 | ||
4633 | case SCTP_AUTOCLOSE: | |
0b49a65c | 4634 | retval = sctp_setsockopt_autoclose(sk, kopt, optlen); |
1da177e4 LT |
4635 | break; |
4636 | ||
4637 | case SCTP_PEER_ADDR_PARAMS: | |
9b7b0d1a | 4638 | retval = sctp_setsockopt_peer_addr_params(sk, kopt, optlen); |
1da177e4 LT |
4639 | break; |
4640 | ||
4580ccc0 | 4641 | case SCTP_DELAYED_SACK: |
ebb25def | 4642 | retval = sctp_setsockopt_delayed_ack(sk, kopt, optlen); |
7708610b | 4643 | break; |
d49d91d7 | 4644 | case SCTP_PARTIAL_DELIVERY_POINT: |
bb13d647 | 4645 | retval = sctp_setsockopt_partial_delivery_point(sk, kopt, optlen); |
d49d91d7 | 4646 | break; |
7708610b | 4647 | |
1da177e4 | 4648 | case SCTP_INITMSG: |
9dfa6f04 | 4649 | retval = sctp_setsockopt_initmsg(sk, kopt, optlen); |
1da177e4 LT |
4650 | break; |
4651 | case SCTP_DEFAULT_SEND_PARAM: | |
c23ad6d2 | 4652 | retval = sctp_setsockopt_default_send_param(sk, kopt, optlen); |
1da177e4 | 4653 | break; |
6b3fd5f3 | 4654 | case SCTP_DEFAULT_SNDINFO: |
8a2409d3 | 4655 | retval = sctp_setsockopt_default_sndinfo(sk, kopt, optlen); |
6b3fd5f3 | 4656 | break; |
1da177e4 | 4657 | case SCTP_PRIMARY_ADDR: |
1eec6958 | 4658 | retval = sctp_setsockopt_primary_addr(sk, kopt, optlen); |
1da177e4 LT |
4659 | break; |
4660 | case SCTP_SET_PEER_PRIMARY_ADDR: | |
46a0ae9d | 4661 | retval = sctp_setsockopt_peer_primary_addr(sk, kopt, optlen); |
1da177e4 LT |
4662 | break; |
4663 | case SCTP_NODELAY: | |
f87ddbc0 | 4664 | retval = sctp_setsockopt_nodelay(sk, kopt, optlen); |
1da177e4 LT |
4665 | break; |
4666 | case SCTP_RTOINFO: | |
af5ae60e | 4667 | retval = sctp_setsockopt_rtoinfo(sk, kopt, optlen); |
1da177e4 LT |
4668 | break; |
4669 | case SCTP_ASSOCINFO: | |
5b864c8d | 4670 | retval = sctp_setsockopt_associnfo(sk, kopt, optlen); |
1da177e4 LT |
4671 | break; |
4672 | case SCTP_I_WANT_MAPPED_V4_ADDR: | |
ffc08f08 | 4673 | retval = sctp_setsockopt_mappedv4(sk, kopt, optlen); |
1da177e4 LT |
4674 | break; |
4675 | case SCTP_MAXSEG: | |
dcd03575 | 4676 | retval = sctp_setsockopt_maxseg(sk, kopt, optlen); |
1da177e4 | 4677 | break; |
0f3fffd8 | 4678 | case SCTP_ADAPTATION_LAYER: |
07e5035c | 4679 | retval = sctp_setsockopt_adaptation_layer(sk, kopt, optlen); |
1da177e4 | 4680 | break; |
6ab792f5 | 4681 | case SCTP_CONTEXT: |
722eca9e | 4682 | retval = sctp_setsockopt_context(sk, kopt, optlen); |
6ab792f5 | 4683 | break; |
b6e1331f | 4684 | case SCTP_FRAGMENT_INTERLEAVE: |
1031cea0 | 4685 | retval = sctp_setsockopt_fragment_interleave(sk, kopt, optlen); |
b6e1331f | 4686 | break; |
70331571 | 4687 | case SCTP_MAX_BURST: |
f5bee0ad | 4688 | retval = sctp_setsockopt_maxburst(sk, kopt, optlen); |
70331571 | 4689 | break; |
65b07e5d | 4690 | case SCTP_AUTH_CHUNK: |
88266d31 | 4691 | retval = sctp_setsockopt_auth_chunk(sk, kopt, optlen); |
65b07e5d VY |
4692 | break; |
4693 | case SCTP_HMAC_IDENT: | |
3564ef44 | 4694 | retval = sctp_setsockopt_hmac_ident(sk, kopt, optlen); |
65b07e5d VY |
4695 | break; |
4696 | case SCTP_AUTH_KEY: | |
534d13d0 | 4697 | retval = sctp_setsockopt_auth_key(sk, kopt, optlen); |
65b07e5d VY |
4698 | break; |
4699 | case SCTP_AUTH_ACTIVE_KEY: | |
dcab0a7a | 4700 | retval = sctp_setsockopt_active_key(sk, kopt, optlen); |
65b07e5d VY |
4701 | break; |
4702 | case SCTP_AUTH_DELETE_KEY: | |
97dc9f2e | 4703 | retval = sctp_setsockopt_del_key(sk, kopt, optlen); |
65b07e5d | 4704 | break; |
601590ec | 4705 | case SCTP_AUTH_DEACTIVATE_KEY: |
76b3d0c4 | 4706 | retval = sctp_setsockopt_deactivate_key(sk, kopt, optlen); |
601590ec | 4707 | break; |
7dc04d71 | 4708 | case SCTP_AUTO_ASCONF: |
c9abc2c1 | 4709 | retval = sctp_setsockopt_auto_asconf(sk, kopt, optlen); |
7dc04d71 | 4710 | break; |
5aa93bcf | 4711 | case SCTP_PEER_ADDR_THLDS: |
b0ac3bb8 | 4712 | retval = sctp_setsockopt_paddr_thresholds(sk, kopt, optlen, |
d467ac0a XL |
4713 | false); |
4714 | break; | |
4715 | case SCTP_PEER_ADDR_THLDS_V2: | |
b0ac3bb8 | 4716 | retval = sctp_setsockopt_paddr_thresholds(sk, kopt, optlen, |
d467ac0a | 4717 | true); |
5aa93bcf | 4718 | break; |
0d3a421d | 4719 | case SCTP_RECVRCVINFO: |
a98af7c8 | 4720 | retval = sctp_setsockopt_recvrcvinfo(sk, kopt, optlen); |
0d3a421d | 4721 | break; |
2347c80f | 4722 | case SCTP_RECVNXTINFO: |
cfa6fde2 | 4723 | retval = sctp_setsockopt_recvnxtinfo(sk, kopt, optlen); |
2347c80f | 4724 | break; |
28aa4c26 | 4725 | case SCTP_PR_SUPPORTED: |
4a97fa4f | 4726 | retval = sctp_setsockopt_pr_supported(sk, kopt, optlen); |
28aa4c26 | 4727 | break; |
f959fb44 | 4728 | case SCTP_DEFAULT_PRINFO: |
ac37435b | 4729 | retval = sctp_setsockopt_default_prinfo(sk, kopt, optlen); |
f959fb44 | 4730 | break; |
c0d8bab6 | 4731 | case SCTP_RECONFIG_SUPPORTED: |
3f49f720 | 4732 | retval = sctp_setsockopt_reconfig_supported(sk, kopt, optlen); |
c0d8bab6 | 4733 | break; |
9fb657ae | 4734 | case SCTP_ENABLE_STREAM_RESET: |
356dc6f1 | 4735 | retval = sctp_setsockopt_enable_strreset(sk, kopt, optlen); |
9fb657ae | 4736 | break; |
7f9d68ac | 4737 | case SCTP_RESET_STREAMS: |
d4922434 | 4738 | retval = sctp_setsockopt_reset_streams(sk, kopt, optlen); |
7f9d68ac | 4739 | break; |
a92ce1a4 | 4740 | case SCTP_RESET_ASSOC: |
b97d20ce | 4741 | retval = sctp_setsockopt_reset_assoc(sk, kopt, optlen); |
a92ce1a4 | 4742 | break; |
242bd2d5 | 4743 | case SCTP_ADD_STREAMS: |
4d6fb260 | 4744 | retval = sctp_setsockopt_add_streams(sk, kopt, optlen); |
242bd2d5 | 4745 | break; |
13aa8770 | 4746 | case SCTP_STREAM_SCHEDULER: |
4d2fba3a | 4747 | retval = sctp_setsockopt_scheduler(sk, kopt, optlen); |
13aa8770 | 4748 | break; |
0ccdf3c7 | 4749 | case SCTP_STREAM_SCHEDULER_VALUE: |
d636e7f3 | 4750 | retval = sctp_setsockopt_scheduler_value(sk, kopt, optlen); |
0ccdf3c7 | 4751 | break; |
772a5869 | 4752 | case SCTP_INTERLEAVING_SUPPORTED: |
5b8d3b24 | 4753 | retval = sctp_setsockopt_interleaving_supported(sk, kopt, |
772a5869 XL |
4754 | optlen); |
4755 | break; | |
b0e9a2fe | 4756 | case SCTP_REUSE_PORT: |
a4262466 | 4757 | retval = sctp_setsockopt_reuse_port(sk, kopt, optlen); |
b0e9a2fe | 4758 | break; |
480ba9c1 | 4759 | case SCTP_EVENT: |
565059cb | 4760 | retval = sctp_setsockopt_event(sk, kopt, optlen); |
480ba9c1 | 4761 | break; |
df2c71ff | 4762 | case SCTP_ASCONF_SUPPORTED: |
9263ac97 | 4763 | retval = sctp_setsockopt_asconf_supported(sk, kopt, optlen); |
df2c71ff | 4764 | break; |
56dd525a | 4765 | case SCTP_AUTH_SUPPORTED: |
963855a9 | 4766 | retval = sctp_setsockopt_auth_supported(sk, kopt, optlen); |
56dd525a | 4767 | break; |
d5886b91 | 4768 | case SCTP_ECN_SUPPORTED: |
92c4f172 | 4769 | retval = sctp_setsockopt_ecn_supported(sk, kopt, optlen); |
d5886b91 | 4770 | break; |
8d2a6935 | 4771 | case SCTP_EXPOSE_POTENTIALLY_FAILED_STATE: |
26feba80 | 4772 | retval = sctp_setsockopt_pf_expose(sk, kopt, optlen); |
8d2a6935 | 4773 | break; |
8dba2960 XL |
4774 | case SCTP_REMOTE_UDP_ENCAPS_PORT: |
4775 | retval = sctp_setsockopt_encap_port(sk, kopt, optlen); | |
4776 | break; | |
3190b649 XL |
4777 | case SCTP_PLPMTUD_PROBE_INTERVAL: |
4778 | retval = sctp_setsockopt_probe_interval(sk, kopt, optlen); | |
4779 | break; | |
1da177e4 LT |
4780 | default: |
4781 | retval = -ENOPROTOOPT; | |
4782 | break; | |
3ff50b79 | 4783 | } |
1da177e4 | 4784 | |
048ed4b6 | 4785 | release_sock(sk); |
ca84bd05 | 4786 | kfree(kopt); |
1da177e4 LT |
4787 | return retval; |
4788 | } | |
4789 | ||
4790 | /* API 3.1.6 connect() - UDP Style Syntax | |
4791 | * | |
4792 | * An application may use the connect() call in the UDP model to initiate an | |
4793 | * association without sending data. | |
4794 | * | |
4795 | * The syntax is: | |
4796 | * | |
4797 | * ret = connect(int sd, const struct sockaddr *nam, socklen_t len); | |
4798 | * | |
4799 | * sd: the socket descriptor to have a new association added to. | |
4800 | * | |
4801 | * nam: the address structure (either struct sockaddr_in or struct | |
4802 | * sockaddr_in6 defined in RFC2553 [7]). | |
4803 | * | |
4804 | * len: the size of the address. | |
4805 | */ | |
dda91928 | 4806 | static int sctp_connect(struct sock *sk, struct sockaddr *addr, |
644fbdea | 4807 | int addr_len, int flags) |
1da177e4 | 4808 | { |
3f7a87d2 | 4809 | struct sctp_af *af; |
9b6c0887 | 4810 | int err = -EINVAL; |
1da177e4 | 4811 | |
048ed4b6 | 4812 | lock_sock(sk); |
bb33381d DB |
4813 | pr_debug("%s: sk:%p, sockaddr:%p, addr_len:%d\n", __func__, sk, |
4814 | addr, addr_len); | |
1da177e4 | 4815 | |
3f7a87d2 | 4816 | /* Validate addr_len before calling common connect/connectx routine. */ |
9b6c0887 XL |
4817 | af = sctp_get_af_specific(addr->sa_family); |
4818 | if (af && addr_len >= af->sockaddr_len) | |
644fbdea | 4819 | err = __sctp_connect(sk, addr, af->sockaddr_len, flags, NULL); |
1da177e4 | 4820 | |
048ed4b6 | 4821 | release_sock(sk); |
1da177e4 LT |
4822 | return err; |
4823 | } | |
4824 | ||
644fbdea XL |
4825 | int sctp_inet_connect(struct socket *sock, struct sockaddr *uaddr, |
4826 | int addr_len, int flags) | |
4827 | { | |
4828 | if (addr_len < sizeof(uaddr->sa_family)) | |
4829 | return -EINVAL; | |
4830 | ||
4831 | if (uaddr->sa_family == AF_UNSPEC) | |
4832 | return -EOPNOTSUPP; | |
4833 | ||
4834 | return sctp_connect(sock->sk, uaddr, addr_len, flags); | |
4835 | } | |
4836 | ||
cda91d5b | 4837 | /* Only called when shutdown a listening SCTP socket. */ |
dda91928 | 4838 | static int sctp_disconnect(struct sock *sk, int flags) |
1da177e4 | 4839 | { |
cda91d5b XL |
4840 | if (!sctp_style(sk, TCP)) |
4841 | return -EOPNOTSUPP; | |
4842 | ||
4843 | sk->sk_shutdown |= RCV_SHUTDOWN; | |
4844 | return 0; | |
1da177e4 LT |
4845 | } |
4846 | ||
4847 | /* 4.1.4 accept() - TCP Style Syntax | |
4848 | * | |
4849 | * Applications use accept() call to remove an established SCTP | |
4850 | * association from the accept queue of the endpoint. A new socket | |
4851 | * descriptor will be returned from accept() to represent the newly | |
4852 | * formed association. | |
4853 | */ | |
92ef0fd5 | 4854 | static struct sock *sctp_accept(struct sock *sk, struct proto_accept_arg *arg) |
1da177e4 LT |
4855 | { |
4856 | struct sctp_sock *sp; | |
4857 | struct sctp_endpoint *ep; | |
4858 | struct sock *newsk = NULL; | |
4859 | struct sctp_association *asoc; | |
4860 | long timeo; | |
4861 | int error = 0; | |
4862 | ||
048ed4b6 | 4863 | lock_sock(sk); |
1da177e4 LT |
4864 | |
4865 | sp = sctp_sk(sk); | |
4866 | ep = sp->ep; | |
4867 | ||
4868 | if (!sctp_style(sk, TCP)) { | |
4869 | error = -EOPNOTSUPP; | |
4870 | goto out; | |
4871 | } | |
4872 | ||
cda91d5b XL |
4873 | if (!sctp_sstate(sk, LISTENING) || |
4874 | (sk->sk_shutdown & RCV_SHUTDOWN)) { | |
1da177e4 LT |
4875 | error = -EINVAL; |
4876 | goto out; | |
4877 | } | |
4878 | ||
92ef0fd5 | 4879 | timeo = sock_rcvtimeo(sk, arg->flags & O_NONBLOCK); |
1da177e4 LT |
4880 | |
4881 | error = sctp_wait_for_accept(sk, timeo); | |
4882 | if (error) | |
4883 | goto out; | |
4884 | ||
4885 | /* We treat the list of associations on the endpoint as the accept | |
4886 | * queue and pick the first association on the list. | |
4887 | */ | |
4888 | asoc = list_entry(ep->asocs.next, struct sctp_association, asocs); | |
4889 | ||
92ef0fd5 | 4890 | newsk = sp->pf->create_accept_sk(sk, asoc, arg->kern); |
1da177e4 LT |
4891 | if (!newsk) { |
4892 | error = -ENOMEM; | |
4893 | goto out; | |
4894 | } | |
4895 | ||
4896 | /* Populate the fields of the newsk from the oldsk and migrate the | |
4897 | * asoc to the newsk. | |
4898 | */ | |
89664c62 XL |
4899 | error = sctp_sock_migrate(sk, newsk, asoc, SCTP_SOCKET_TCP); |
4900 | if (error) { | |
4901 | sk_common_release(newsk); | |
4902 | newsk = NULL; | |
4903 | } | |
1da177e4 LT |
4904 | |
4905 | out: | |
048ed4b6 | 4906 | release_sock(sk); |
92ef0fd5 | 4907 | arg->err = error; |
1da177e4 LT |
4908 | return newsk; |
4909 | } | |
4910 | ||
4911 | /* The SCTP ioctl handler. */ | |
e1d001fa | 4912 | static int sctp_ioctl(struct sock *sk, int cmd, int *karg) |
1da177e4 | 4913 | { |
65040c33 DEFP |
4914 | int rc = -ENOTCONN; |
4915 | ||
048ed4b6 | 4916 | lock_sock(sk); |
65040c33 DEFP |
4917 | |
4918 | /* | |
4919 | * SEQPACKET-style sockets in LISTENING state are valid, for | |
4920 | * SCTP, so only discard TCP-style sockets in LISTENING state. | |
4921 | */ | |
4922 | if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING)) | |
4923 | goto out; | |
4924 | ||
4925 | switch (cmd) { | |
4926 | case SIOCINQ: { | |
4927 | struct sk_buff *skb; | |
e1d001fa | 4928 | *karg = 0; |
65040c33 DEFP |
4929 | |
4930 | skb = skb_peek(&sk->sk_receive_queue); | |
4931 | if (skb != NULL) { | |
4932 | /* | |
4933 | * We will only return the amount of this packet since | |
4934 | * that is all that will be read. | |
4935 | */ | |
e1d001fa | 4936 | *karg = skb->len; |
65040c33 | 4937 | } |
e1d001fa | 4938 | rc = 0; |
65040c33 | 4939 | break; |
9a7241c2 | 4940 | } |
65040c33 DEFP |
4941 | default: |
4942 | rc = -ENOIOCTLCMD; | |
4943 | break; | |
4944 | } | |
4945 | out: | |
048ed4b6 | 4946 | release_sock(sk); |
65040c33 | 4947 | return rc; |
1da177e4 LT |
4948 | } |
4949 | ||
4950 | /* This is the function which gets called during socket creation to | |
4951 | * initialized the SCTP-specific portion of the sock. | |
4952 | * The sock structure should already be zero-filled memory. | |
4953 | */ | |
dda91928 | 4954 | static int sctp_init_sock(struct sock *sk) |
1da177e4 | 4955 | { |
e1fc3b14 | 4956 | struct net *net = sock_net(sk); |
1da177e4 LT |
4957 | struct sctp_sock *sp; |
4958 | ||
bb33381d | 4959 | pr_debug("%s: sk:%p\n", __func__, sk); |
1da177e4 LT |
4960 | |
4961 | sp = sctp_sk(sk); | |
4962 | ||
4963 | /* Initialize the SCTP per socket area. */ | |
4964 | switch (sk->sk_type) { | |
4965 | case SOCK_SEQPACKET: | |
4966 | sp->type = SCTP_SOCKET_UDP; | |
4967 | break; | |
4968 | case SOCK_STREAM: | |
4969 | sp->type = SCTP_SOCKET_TCP; | |
4970 | break; | |
4971 | default: | |
4972 | return -ESOCKTNOSUPPORT; | |
4973 | } | |
4974 | ||
90017acc MRL |
4975 | sk->sk_gso_type = SKB_GSO_SCTP; |
4976 | ||
1da177e4 LT |
4977 | /* Initialize default send parameters. These parameters can be |
4978 | * modified with the SCTP_DEFAULT_SEND_PARAM socket option. | |
4979 | */ | |
4980 | sp->default_stream = 0; | |
4981 | sp->default_ppid = 0; | |
4982 | sp->default_flags = 0; | |
4983 | sp->default_context = 0; | |
4984 | sp->default_timetolive = 0; | |
4985 | ||
6ab792f5 | 4986 | sp->default_rcv_context = 0; |
e1fc3b14 | 4987 | sp->max_burst = net->sctp.max_burst; |
6ab792f5 | 4988 | |
3c68198e NH |
4989 | sp->sctp_hmac_alg = net->sctp.sctp_hmac_alg; |
4990 | ||
1da177e4 LT |
4991 | /* Initialize default setup parameters. These parameters |
4992 | * can be modified with the SCTP_INITMSG socket option or | |
4993 | * overridden by the SCTP_INIT CMSG. | |
4994 | */ | |
4995 | sp->initmsg.sinit_num_ostreams = sctp_max_outstreams; | |
4996 | sp->initmsg.sinit_max_instreams = sctp_max_instreams; | |
e1fc3b14 EB |
4997 | sp->initmsg.sinit_max_attempts = net->sctp.max_retrans_init; |
4998 | sp->initmsg.sinit_max_init_timeo = net->sctp.rto_max; | |
1da177e4 LT |
4999 | |
5000 | /* Initialize default RTO related parameters. These parameters can | |
5001 | * be modified for with the SCTP_RTOINFO socket option. | |
5002 | */ | |
e1fc3b14 EB |
5003 | sp->rtoinfo.srto_initial = net->sctp.rto_initial; |
5004 | sp->rtoinfo.srto_max = net->sctp.rto_max; | |
5005 | sp->rtoinfo.srto_min = net->sctp.rto_min; | |
1da177e4 LT |
5006 | |
5007 | /* Initialize default association related parameters. These parameters | |
5008 | * can be modified with the SCTP_ASSOCINFO socket option. | |
5009 | */ | |
e1fc3b14 | 5010 | sp->assocparams.sasoc_asocmaxrxt = net->sctp.max_retrans_association; |
1da177e4 LT |
5011 | sp->assocparams.sasoc_number_peer_destinations = 0; |
5012 | sp->assocparams.sasoc_peer_rwnd = 0; | |
5013 | sp->assocparams.sasoc_local_rwnd = 0; | |
e1fc3b14 | 5014 | sp->assocparams.sasoc_cookie_life = net->sctp.valid_cookie_life; |
1da177e4 LT |
5015 | |
5016 | /* Initialize default event subscriptions. By default, all the | |
d808ad9a | 5017 | * options are off. |
1da177e4 | 5018 | */ |
2cc0eeb6 | 5019 | sp->subscribe = 0; |
1da177e4 LT |
5020 | |
5021 | /* Default Peer Address Parameters. These defaults can | |
5022 | * be modified via SCTP_PEER_ADDR_PARAMS | |
5023 | */ | |
e1fc3b14 | 5024 | sp->hbinterval = net->sctp.hb_interval; |
f1bfe8b5 | 5025 | sp->udp_port = htons(net->sctp.udp_port); |
e8a3001c | 5026 | sp->encap_port = htons(net->sctp.encap_port); |
e1fc3b14 | 5027 | sp->pathmaxrxt = net->sctp.max_retrans_path; |
8add543e | 5028 | sp->pf_retrans = net->sctp.pf_retrans; |
34515e94 | 5029 | sp->ps_retrans = net->sctp.ps_retrans; |
aef587be | 5030 | sp->pf_expose = net->sctp.pf_expose; |
4e2d52bf | 5031 | sp->pathmtu = 0; /* allow default discovery */ |
e1fc3b14 | 5032 | sp->sackdelay = net->sctp.sack_timeout; |
7bfe8bdb | 5033 | sp->sackfreq = 2; |
52ccb8e9 | 5034 | sp->param_flags = SPP_HB_ENABLE | |
d808ad9a YH |
5035 | SPP_PMTUD_ENABLE | |
5036 | SPP_SACKDELAY_ENABLE; | |
7efba10d | 5037 | sp->default_ss = SCTP_SS_DEFAULT; |
1da177e4 LT |
5038 | |
5039 | /* If enabled no SCTP message fragmentation will be performed. | |
5040 | * Configure through SCTP_DISABLE_FRAGMENTS socket option. | |
5041 | */ | |
5042 | sp->disable_fragments = 0; | |
5043 | ||
208edef6 SS |
5044 | /* Enable Nagle algorithm by default. */ |
5045 | sp->nodelay = 0; | |
1da177e4 | 5046 | |
0d3a421d | 5047 | sp->recvrcvinfo = 0; |
2347c80f | 5048 | sp->recvnxtinfo = 0; |
0d3a421d | 5049 | |
1da177e4 LT |
5050 | /* Enable by default. */ |
5051 | sp->v4mapped = 1; | |
5052 | ||
5053 | /* Auto-close idle associations after the configured | |
5054 | * number of seconds. A value of 0 disables this | |
5055 | * feature. Configure through the SCTP_AUTOCLOSE socket option, | |
5056 | * for UDP-style sockets only. | |
5057 | */ | |
5058 | sp->autoclose = 0; | |
5059 | ||
5060 | /* User specified fragmentation limit. */ | |
5061 | sp->user_frag = 0; | |
5062 | ||
0f3fffd8 | 5063 | sp->adaptation_ind = 0; |
1da177e4 LT |
5064 | |
5065 | sp->pf = sctp_get_pf_specific(sk->sk_family); | |
5066 | ||
5067 | /* Control variables for partial data delivery. */ | |
b6e1331f | 5068 | atomic_set(&sp->pd_mode, 0); |
1da177e4 | 5069 | skb_queue_head_init(&sp->pd_lobby); |
b6e1331f | 5070 | sp->frag_interleave = 0; |
d1e462a7 | 5071 | sp->probe_interval = net->sctp.probe_interval; |
1da177e4 LT |
5072 | |
5073 | /* Create a per socket endpoint structure. Even if we | |
5074 | * change the data structure relationships, this may still | |
5075 | * be useful for storing pre-connect address information. | |
5076 | */ | |
c164b838 DB |
5077 | sp->ep = sctp_endpoint_new(sk, GFP_KERNEL); |
5078 | if (!sp->ep) | |
1da177e4 LT |
5079 | return -ENOMEM; |
5080 | ||
1da177e4 LT |
5081 | sp->hmac = NULL; |
5082 | ||
0a2fbac1 DB |
5083 | sk->sk_destruct = sctp_destruct_sock; |
5084 | ||
1da177e4 | 5085 | SCTP_DBG_OBJCNT_INC(sock); |
6f756a8c | 5086 | |
8cb38a60 | 5087 | sk_sockets_allocated_inc(sk); |
e1fc3b14 | 5088 | sock_prot_inuse_add(net, sk->sk_prot, 1); |
2d45a02d | 5089 | |
1da177e4 LT |
5090 | return 0; |
5091 | } | |
5092 | ||
2d45a02d MRL |
5093 | /* Cleanup any SCTP per socket resources. Must be called with |
5094 | * sock_net(sk)->sctp.addr_wq_lock held if sp->do_auto_asconf is true | |
5095 | */ | |
dda91928 | 5096 | static void sctp_destroy_sock(struct sock *sk) |
1da177e4 | 5097 | { |
9f7d653b | 5098 | struct sctp_sock *sp; |
1da177e4 | 5099 | |
bb33381d | 5100 | pr_debug("%s: sk:%p\n", __func__, sk); |
1da177e4 LT |
5101 | |
5102 | /* Release our hold on the endpoint. */ | |
9f7d653b | 5103 | sp = sctp_sk(sk); |
1abd165e DB |
5104 | /* This could happen during socket init, thus we bail out |
5105 | * early, since the rest of the below is not setup either. | |
5106 | */ | |
5107 | if (sp->ep == NULL) | |
5108 | return; | |
5109 | ||
9f7d653b MH |
5110 | if (sp->do_auto_asconf) { |
5111 | sp->do_auto_asconf = 0; | |
5112 | list_del(&sp->auto_asconf_list); | |
5113 | } | |
5114 | sctp_endpoint_free(sp->ep); | |
8cb38a60 | 5115 | sk_sockets_allocated_dec(sk); |
9a57f7fa | 5116 | sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); |
1da177e4 LT |
5117 | } |
5118 | ||
0a2fbac1 | 5119 | /* Triggered when there are no references on the socket anymore */ |
6431b0f6 | 5120 | static void sctp_destruct_common(struct sock *sk) |
0a2fbac1 DB |
5121 | { |
5122 | struct sctp_sock *sp = sctp_sk(sk); | |
5123 | ||
5124 | /* Free up the HMAC transform. */ | |
5821c769 | 5125 | crypto_free_shash(sp->hmac); |
6431b0f6 | 5126 | } |
0a2fbac1 | 5127 | |
6431b0f6 KI |
5128 | static void sctp_destruct_sock(struct sock *sk) |
5129 | { | |
5130 | sctp_destruct_common(sk); | |
0a2fbac1 DB |
5131 | inet_sock_destruct(sk); |
5132 | } | |
5133 | ||
1da177e4 LT |
5134 | /* API 4.1.7 shutdown() - TCP Style Syntax |
5135 | * int shutdown(int socket, int how); | |
5136 | * | |
5137 | * sd - the socket descriptor of the association to be closed. | |
5138 | * how - Specifies the type of shutdown. The values are | |
5139 | * as follows: | |
5140 | * SHUT_RD | |
5141 | * Disables further receive operations. No SCTP | |
5142 | * protocol action is taken. | |
5143 | * SHUT_WR | |
5144 | * Disables further send operations, and initiates | |
5145 | * the SCTP shutdown sequence. | |
5146 | * SHUT_RDWR | |
5147 | * Disables further send and receive operations | |
5148 | * and initiates the SCTP shutdown sequence. | |
5149 | */ | |
dda91928 | 5150 | static void sctp_shutdown(struct sock *sk, int how) |
1da177e4 | 5151 | { |
55e26eb9 | 5152 | struct net *net = sock_net(sk); |
1da177e4 | 5153 | struct sctp_endpoint *ep; |
1da177e4 LT |
5154 | |
5155 | if (!sctp_style(sk, TCP)) | |
5156 | return; | |
5157 | ||
5bf35ddf XL |
5158 | ep = sctp_sk(sk)->ep; |
5159 | if (how & SEND_SHUTDOWN && !list_empty(&ep->asocs)) { | |
5160 | struct sctp_association *asoc; | |
5161 | ||
cbabf463 | 5162 | inet_sk_set_state(sk, SCTP_SS_CLOSING); |
5bf35ddf XL |
5163 | asoc = list_entry(ep->asocs.next, |
5164 | struct sctp_association, asocs); | |
5165 | sctp_primitive_SHUTDOWN(net, asoc, NULL); | |
1da177e4 LT |
5166 | } |
5167 | } | |
5168 | ||
52c52a61 XL |
5169 | int sctp_get_sctp_info(struct sock *sk, struct sctp_association *asoc, |
5170 | struct sctp_info *info) | |
5171 | { | |
5172 | struct sctp_transport *prim; | |
5173 | struct list_head *pos; | |
5174 | int mask; | |
5175 | ||
5176 | memset(info, 0, sizeof(*info)); | |
5177 | if (!asoc) { | |
5178 | struct sctp_sock *sp = sctp_sk(sk); | |
5179 | ||
5180 | info->sctpi_s_autoclose = sp->autoclose; | |
5181 | info->sctpi_s_adaptation_ind = sp->adaptation_ind; | |
5182 | info->sctpi_s_pd_point = sp->pd_point; | |
5183 | info->sctpi_s_nodelay = sp->nodelay; | |
5184 | info->sctpi_s_disable_fragments = sp->disable_fragments; | |
5185 | info->sctpi_s_v4mapped = sp->v4mapped; | |
5186 | info->sctpi_s_frag_interleave = sp->frag_interleave; | |
40eb90e9 | 5187 | info->sctpi_s_type = sp->type; |
52c52a61 XL |
5188 | |
5189 | return 0; | |
5190 | } | |
5191 | ||
5192 | info->sctpi_tag = asoc->c.my_vtag; | |
5193 | info->sctpi_state = asoc->state; | |
5194 | info->sctpi_rwnd = asoc->a_rwnd; | |
5195 | info->sctpi_unackdata = asoc->unack_data; | |
5196 | info->sctpi_penddata = sctp_tsnmap_pending(&asoc->peer.tsn_map); | |
cee360ab XL |
5197 | info->sctpi_instrms = asoc->stream.incnt; |
5198 | info->sctpi_outstrms = asoc->stream.outcnt; | |
52c52a61 XL |
5199 | list_for_each(pos, &asoc->base.inqueue.in_chunk_list) |
5200 | info->sctpi_inqueue++; | |
5201 | list_for_each(pos, &asoc->outqueue.out_chunk_list) | |
5202 | info->sctpi_outqueue++; | |
5203 | info->sctpi_overall_error = asoc->overall_error_count; | |
5204 | info->sctpi_max_burst = asoc->max_burst; | |
5205 | info->sctpi_maxseg = asoc->frag_point; | |
5206 | info->sctpi_peer_rwnd = asoc->peer.rwnd; | |
5207 | info->sctpi_peer_tag = asoc->c.peer_vtag; | |
5208 | ||
ab4f1e28 XL |
5209 | mask = asoc->peer.intl_capable << 1; |
5210 | mask = (mask | asoc->peer.ecn_capable) << 1; | |
52c52a61 XL |
5211 | mask = (mask | asoc->peer.ipv4_address) << 1; |
5212 | mask = (mask | asoc->peer.ipv6_address) << 1; | |
ab4f1e28 | 5213 | mask = (mask | asoc->peer.reconf_capable) << 1; |
52c52a61 XL |
5214 | mask = (mask | asoc->peer.asconf_capable) << 1; |
5215 | mask = (mask | asoc->peer.prsctp_capable) << 1; | |
5216 | mask = (mask | asoc->peer.auth_capable); | |
5217 | info->sctpi_peer_capable = mask; | |
5218 | mask = asoc->peer.sack_needed << 1; | |
5219 | mask = (mask | asoc->peer.sack_generation) << 1; | |
5220 | mask = (mask | asoc->peer.zero_window_announced); | |
5221 | info->sctpi_peer_sack = mask; | |
5222 | ||
5223 | info->sctpi_isacks = asoc->stats.isacks; | |
5224 | info->sctpi_osacks = asoc->stats.osacks; | |
5225 | info->sctpi_opackets = asoc->stats.opackets; | |
5226 | info->sctpi_ipackets = asoc->stats.ipackets; | |
5227 | info->sctpi_rtxchunks = asoc->stats.rtxchunks; | |
5228 | info->sctpi_outofseqtsns = asoc->stats.outofseqtsns; | |
5229 | info->sctpi_idupchunks = asoc->stats.idupchunks; | |
5230 | info->sctpi_gapcnt = asoc->stats.gapcnt; | |
5231 | info->sctpi_ouodchunks = asoc->stats.ouodchunks; | |
5232 | info->sctpi_iuodchunks = asoc->stats.iuodchunks; | |
5233 | info->sctpi_oodchunks = asoc->stats.oodchunks; | |
5234 | info->sctpi_iodchunks = asoc->stats.iodchunks; | |
5235 | info->sctpi_octrlchunks = asoc->stats.octrlchunks; | |
5236 | info->sctpi_ictrlchunks = asoc->stats.ictrlchunks; | |
5237 | ||
5238 | prim = asoc->peer.primary_path; | |
ee6c88bb | 5239 | memcpy(&info->sctpi_p_address, &prim->ipaddr, sizeof(prim->ipaddr)); |
52c52a61 XL |
5240 | info->sctpi_p_state = prim->state; |
5241 | info->sctpi_p_cwnd = prim->cwnd; | |
5242 | info->sctpi_p_srtt = prim->srtt; | |
5243 | info->sctpi_p_rto = jiffies_to_msecs(prim->rto); | |
5244 | info->sctpi_p_hbinterval = prim->hbinterval; | |
5245 | info->sctpi_p_pathmaxrxt = prim->pathmaxrxt; | |
5246 | info->sctpi_p_sackdelay = jiffies_to_msecs(prim->sackdelay); | |
5247 | info->sctpi_p_ssthresh = prim->ssthresh; | |
5248 | info->sctpi_p_partial_bytes_acked = prim->partial_bytes_acked; | |
5249 | info->sctpi_p_flight_size = prim->flight_size; | |
5250 | info->sctpi_p_error = prim->error_count; | |
5251 | ||
5252 | return 0; | |
5253 | } | |
5254 | EXPORT_SYMBOL_GPL(sctp_get_sctp_info); | |
5255 | ||
626d16f5 | 5256 | /* use callback to avoid exporting the core structure */ |
6c72b774 | 5257 | void sctp_transport_walk_start(struct rhashtable_iter *iter) __acquires(RCU) |
626d16f5 | 5258 | { |
7fda702f | 5259 | rhltable_walk_enter(&sctp_transport_hashtable, iter); |
626d16f5 | 5260 | |
97a6ec4a | 5261 | rhashtable_walk_start(iter); |
626d16f5 XL |
5262 | } |
5263 | ||
b77b4f63 | 5264 | void sctp_transport_walk_stop(struct rhashtable_iter *iter) __releases(RCU) |
626d16f5 XL |
5265 | { |
5266 | rhashtable_walk_stop(iter); | |
5267 | rhashtable_walk_exit(iter); | |
5268 | } | |
5269 | ||
5270 | struct sctp_transport *sctp_transport_get_next(struct net *net, | |
5271 | struct rhashtable_iter *iter) | |
5272 | { | |
5273 | struct sctp_transport *t; | |
5274 | ||
5275 | t = rhashtable_walk_next(iter); | |
5276 | for (; t; t = rhashtable_walk_next(iter)) { | |
5277 | if (IS_ERR(t)) { | |
5278 | if (PTR_ERR(t) == -EAGAIN) | |
5279 | continue; | |
5280 | break; | |
5281 | } | |
5282 | ||
bab1be79 XL |
5283 | if (!sctp_transport_hold(t)) |
5284 | continue; | |
5285 | ||
4e7696d9 | 5286 | if (net_eq(t->asoc->base.net, net) && |
626d16f5 XL |
5287 | t->asoc->peer.primary_path == t) |
5288 | break; | |
bab1be79 XL |
5289 | |
5290 | sctp_transport_put(t); | |
626d16f5 XL |
5291 | } |
5292 | ||
5293 | return t; | |
5294 | } | |
5295 | ||
5296 | struct sctp_transport *sctp_transport_get_idx(struct net *net, | |
5297 | struct rhashtable_iter *iter, | |
5298 | int pos) | |
5299 | { | |
bab1be79 | 5300 | struct sctp_transport *t; |
626d16f5 | 5301 | |
bab1be79 XL |
5302 | if (!pos) |
5303 | return SEQ_START_TOKEN; | |
626d16f5 | 5304 | |
bab1be79 XL |
5305 | while ((t = sctp_transport_get_next(net, iter)) && !IS_ERR(t)) { |
5306 | if (!--pos) | |
5307 | break; | |
5308 | sctp_transport_put(t); | |
5309 | } | |
5310 | ||
5311 | return t; | |
626d16f5 XL |
5312 | } |
5313 | ||
5314 | int sctp_for_each_endpoint(int (*cb)(struct sctp_endpoint *, void *), | |
5315 | void *p) { | |
5316 | int err = 0; | |
5317 | int hash = 0; | |
3d3b2f57 | 5318 | struct sctp_endpoint *ep; |
626d16f5 XL |
5319 | struct sctp_hashbucket *head; |
5320 | ||
5321 | for (head = sctp_ep_hashtable; hash < sctp_ep_hashsize; | |
5322 | hash++, head++) { | |
581409da | 5323 | read_lock_bh(&head->lock); |
3d3b2f57 XL |
5324 | sctp_for_each_hentry(ep, &head->chain) { |
5325 | err = cb(ep, p); | |
626d16f5 XL |
5326 | if (err) |
5327 | break; | |
5328 | } | |
581409da | 5329 | read_unlock_bh(&head->lock); |
626d16f5 XL |
5330 | } |
5331 | ||
5332 | return err; | |
5333 | } | |
5334 | EXPORT_SYMBOL_GPL(sctp_for_each_endpoint); | |
5335 | ||
f9d31c4c | 5336 | int sctp_transport_lookup_process(sctp_callback_t cb, struct net *net, |
626d16f5 | 5337 | const union sctp_addr *laddr, |
0af03170 | 5338 | const union sctp_addr *paddr, void *p, int dif) |
626d16f5 XL |
5339 | { |
5340 | struct sctp_transport *transport; | |
f9d31c4c XL |
5341 | struct sctp_endpoint *ep; |
5342 | int err = -ENOENT; | |
626d16f5 XL |
5343 | |
5344 | rcu_read_lock(); | |
0af03170 | 5345 | transport = sctp_addrs_lookup_transport(net, laddr, paddr, dif, dif); |
f9d31c4c XL |
5346 | if (!transport) { |
5347 | rcu_read_unlock(); | |
5348 | return err; | |
5349 | } | |
5350 | ep = transport->asoc->ep; | |
5351 | if (!sctp_endpoint_hold(ep)) { /* asoc can be peeled off */ | |
5352 | sctp_transport_put(transport); | |
5353 | rcu_read_unlock(); | |
5354 | return err; | |
5355 | } | |
08abb795 | 5356 | rcu_read_unlock(); |
1cceda78 | 5357 | |
f9d31c4c XL |
5358 | err = cb(ep, transport, p); |
5359 | sctp_endpoint_put(ep); | |
cd26da4f | 5360 | sctp_transport_put(transport); |
626d16f5 XL |
5361 | return err; |
5362 | } | |
5363 | EXPORT_SYMBOL_GPL(sctp_transport_lookup_process); | |
5364 | ||
5ec7d18d XL |
5365 | int sctp_transport_traverse_process(sctp_callback_t cb, sctp_callback_t cb_done, |
5366 | struct net *net, int *pos, void *p) | |
5367 | { | |
626d16f5 | 5368 | struct rhashtable_iter hti; |
d25adbeb | 5369 | struct sctp_transport *tsp; |
5ec7d18d | 5370 | struct sctp_endpoint *ep; |
d25adbeb | 5371 | int ret; |
626d16f5 | 5372 | |
d25adbeb | 5373 | again: |
f53d77e1 | 5374 | ret = 0; |
97a6ec4a | 5375 | sctp_transport_walk_start(&hti); |
626d16f5 | 5376 | |
d25adbeb XL |
5377 | tsp = sctp_transport_get_idx(net, &hti, *pos + 1); |
5378 | for (; !IS_ERR_OR_NULL(tsp); tsp = sctp_transport_get_next(net, &hti)) { | |
5ec7d18d XL |
5379 | ep = tsp->asoc->ep; |
5380 | if (sctp_endpoint_hold(ep)) { /* asoc can be peeled off */ | |
5381 | ret = cb(ep, tsp, p); | |
5382 | if (ret) | |
5383 | break; | |
5384 | sctp_endpoint_put(ep); | |
5385 | } | |
d25adbeb XL |
5386 | (*pos)++; |
5387 | sctp_transport_put(tsp); | |
626d16f5 | 5388 | } |
626d16f5 | 5389 | sctp_transport_walk_stop(&hti); |
53fa1036 | 5390 | |
d25adbeb | 5391 | if (ret) { |
5ec7d18d | 5392 | if (cb_done && !cb_done(ep, tsp, p)) { |
d25adbeb | 5393 | (*pos)++; |
5ec7d18d | 5394 | sctp_endpoint_put(ep); |
d25adbeb XL |
5395 | sctp_transport_put(tsp); |
5396 | goto again; | |
5397 | } | |
5ec7d18d | 5398 | sctp_endpoint_put(ep); |
d25adbeb XL |
5399 | sctp_transport_put(tsp); |
5400 | } | |
5401 | ||
5402 | return ret; | |
626d16f5 | 5403 | } |
5ec7d18d | 5404 | EXPORT_SYMBOL_GPL(sctp_transport_traverse_process); |
626d16f5 | 5405 | |
1da177e4 LT |
5406 | /* 7.2.1 Association Status (SCTP_STATUS) |
5407 | ||
5408 | * Applications can retrieve current status information about an | |
5409 | * association, including association state, peer receiver window size, | |
5410 | * number of unacked data chunks, and number of data chunks pending | |
5411 | * receipt. This information is read-only. | |
5412 | */ | |
5413 | static int sctp_getsockopt_sctp_status(struct sock *sk, int len, | |
5414 | char __user *optval, | |
5415 | int __user *optlen) | |
5416 | { | |
5417 | struct sctp_status status; | |
5418 | struct sctp_association *asoc = NULL; | |
5419 | struct sctp_transport *transport; | |
5420 | sctp_assoc_t associd; | |
5421 | int retval = 0; | |
5422 | ||
408f22e8 | 5423 | if (len < sizeof(status)) { |
1da177e4 LT |
5424 | retval = -EINVAL; |
5425 | goto out; | |
5426 | } | |
5427 | ||
408f22e8 NH |
5428 | len = sizeof(status); |
5429 | if (copy_from_user(&status, optval, len)) { | |
1da177e4 LT |
5430 | retval = -EFAULT; |
5431 | goto out; | |
5432 | } | |
5433 | ||
5434 | associd = status.sstat_assoc_id; | |
5435 | asoc = sctp_id2assoc(sk, associd); | |
5436 | if (!asoc) { | |
5437 | retval = -EINVAL; | |
5438 | goto out; | |
5439 | } | |
5440 | ||
5441 | transport = asoc->peer.primary_path; | |
5442 | ||
5443 | status.sstat_assoc_id = sctp_assoc2id(asoc); | |
38ab1fa9 | 5444 | status.sstat_state = sctp_assoc_to_state(asoc); |
1da177e4 LT |
5445 | status.sstat_rwnd = asoc->peer.rwnd; |
5446 | status.sstat_unackdata = asoc->unack_data; | |
5447 | ||
5448 | status.sstat_penddata = sctp_tsnmap_pending(&asoc->peer.tsn_map); | |
cee360ab XL |
5449 | status.sstat_instrms = asoc->stream.incnt; |
5450 | status.sstat_outstrms = asoc->stream.outcnt; | |
1da177e4 LT |
5451 | status.sstat_fragmentation_point = asoc->frag_point; |
5452 | status.sstat_primary.spinfo_assoc_id = sctp_assoc2id(transport->asoc); | |
8cec6b80 AV |
5453 | memcpy(&status.sstat_primary.spinfo_address, &transport->ipaddr, |
5454 | transport->af_specific->sockaddr_len); | |
1da177e4 | 5455 | /* Map ipv4 address into v4-mapped-on-v6 address. */ |
299ee123 | 5456 | sctp_get_pf_specific(sk->sk_family)->addr_to_user(sctp_sk(sk), |
1da177e4 | 5457 | (union sctp_addr *)&status.sstat_primary.spinfo_address); |
3f7a87d2 | 5458 | status.sstat_primary.spinfo_state = transport->state; |
1da177e4 LT |
5459 | status.sstat_primary.spinfo_cwnd = transport->cwnd; |
5460 | status.sstat_primary.spinfo_srtt = transport->srtt; | |
5461 | status.sstat_primary.spinfo_rto = jiffies_to_msecs(transport->rto); | |
52ccb8e9 | 5462 | status.sstat_primary.spinfo_mtu = transport->pathmtu; |
1da177e4 | 5463 | |
3f7a87d2 FF |
5464 | if (status.sstat_primary.spinfo_state == SCTP_UNKNOWN) |
5465 | status.sstat_primary.spinfo_state = SCTP_ACTIVE; | |
5466 | ||
1da177e4 LT |
5467 | if (put_user(len, optlen)) { |
5468 | retval = -EFAULT; | |
5469 | goto out; | |
5470 | } | |
5471 | ||
bb33381d DB |
5472 | pr_debug("%s: len:%d, state:%d, rwnd:%d, assoc_id:%d\n", |
5473 | __func__, len, status.sstat_state, status.sstat_rwnd, | |
5474 | status.sstat_assoc_id); | |
1da177e4 LT |
5475 | |
5476 | if (copy_to_user(optval, &status, len)) { | |
5477 | retval = -EFAULT; | |
5478 | goto out; | |
5479 | } | |
5480 | ||
5481 | out: | |
a02cec21 | 5482 | return retval; |
1da177e4 LT |
5483 | } |
5484 | ||
5485 | ||
5486 | /* 7.2.2 Peer Address Information (SCTP_GET_PEER_ADDR_INFO) | |
5487 | * | |
5488 | * Applications can retrieve information about a specific peer address | |
5489 | * of an association, including its reachability state, congestion | |
5490 | * window, and retransmission timer values. This information is | |
5491 | * read-only. | |
5492 | */ | |
5493 | static int sctp_getsockopt_peer_addr_info(struct sock *sk, int len, | |
5494 | char __user *optval, | |
5495 | int __user *optlen) | |
5496 | { | |
5497 | struct sctp_paddrinfo pinfo; | |
5498 | struct sctp_transport *transport; | |
5499 | int retval = 0; | |
5500 | ||
408f22e8 | 5501 | if (len < sizeof(pinfo)) { |
1da177e4 LT |
5502 | retval = -EINVAL; |
5503 | goto out; | |
5504 | } | |
5505 | ||
408f22e8 NH |
5506 | len = sizeof(pinfo); |
5507 | if (copy_from_user(&pinfo, optval, len)) { | |
1da177e4 LT |
5508 | retval = -EFAULT; |
5509 | goto out; | |
5510 | } | |
5511 | ||
5512 | transport = sctp_addr_id2transport(sk, &pinfo.spinfo_address, | |
5513 | pinfo.spinfo_assoc_id); | |
aef587be XL |
5514 | if (!transport) { |
5515 | retval = -EINVAL; | |
5516 | goto out; | |
5517 | } | |
5518 | ||
5519 | if (transport->state == SCTP_PF && | |
5520 | transport->asoc->pf_expose == SCTP_PF_EXPOSE_DISABLE) { | |
5521 | retval = -EACCES; | |
5522 | goto out; | |
5523 | } | |
1da177e4 LT |
5524 | |
5525 | pinfo.spinfo_assoc_id = sctp_assoc2id(transport->asoc); | |
3f7a87d2 | 5526 | pinfo.spinfo_state = transport->state; |
1da177e4 LT |
5527 | pinfo.spinfo_cwnd = transport->cwnd; |
5528 | pinfo.spinfo_srtt = transport->srtt; | |
5529 | pinfo.spinfo_rto = jiffies_to_msecs(transport->rto); | |
52ccb8e9 | 5530 | pinfo.spinfo_mtu = transport->pathmtu; |
1da177e4 | 5531 | |
3f7a87d2 FF |
5532 | if (pinfo.spinfo_state == SCTP_UNKNOWN) |
5533 | pinfo.spinfo_state = SCTP_ACTIVE; | |
5534 | ||
1da177e4 LT |
5535 | if (put_user(len, optlen)) { |
5536 | retval = -EFAULT; | |
5537 | goto out; | |
5538 | } | |
5539 | ||
5540 | if (copy_to_user(optval, &pinfo, len)) { | |
5541 | retval = -EFAULT; | |
5542 | goto out; | |
5543 | } | |
5544 | ||
5545 | out: | |
a02cec21 | 5546 | return retval; |
1da177e4 LT |
5547 | } |
5548 | ||
5549 | /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS) | |
5550 | * | |
5551 | * This option is a on/off flag. If enabled no SCTP message | |
5552 | * fragmentation will be performed. Instead if a message being sent | |
5553 | * exceeds the current PMTU size, the message will NOT be sent and | |
5554 | * instead a error will be indicated to the user. | |
5555 | */ | |
5556 | static int sctp_getsockopt_disable_fragments(struct sock *sk, int len, | |
5557 | char __user *optval, int __user *optlen) | |
5558 | { | |
5559 | int val; | |
5560 | ||
5561 | if (len < sizeof(int)) | |
5562 | return -EINVAL; | |
5563 | ||
5564 | len = sizeof(int); | |
5565 | val = (sctp_sk(sk)->disable_fragments == 1); | |
5566 | if (put_user(len, optlen)) | |
5567 | return -EFAULT; | |
5568 | if (copy_to_user(optval, &val, len)) | |
5569 | return -EFAULT; | |
5570 | return 0; | |
5571 | } | |
5572 | ||
5573 | /* 7.1.15 Set notification and ancillary events (SCTP_EVENTS) | |
5574 | * | |
5575 | * This socket option is used to specify various notifications and | |
5576 | * ancillary data the user wishes to receive. | |
5577 | */ | |
5578 | static int sctp_getsockopt_events(struct sock *sk, int len, char __user *optval, | |
5579 | int __user *optlen) | |
5580 | { | |
2cc0eeb6 XL |
5581 | struct sctp_event_subscribe subscribe; |
5582 | __u8 *sn_type = (__u8 *)&subscribe; | |
5583 | int i; | |
5584 | ||
a4b8e71b | 5585 | if (len == 0) |
1da177e4 | 5586 | return -EINVAL; |
acdd5985 TG |
5587 | if (len > sizeof(struct sctp_event_subscribe)) |
5588 | len = sizeof(struct sctp_event_subscribe); | |
408f22e8 NH |
5589 | if (put_user(len, optlen)) |
5590 | return -EFAULT; | |
2cc0eeb6 XL |
5591 | |
5592 | for (i = 0; i < len; i++) | |
5593 | sn_type[i] = sctp_ulpevent_type_enabled(sctp_sk(sk)->subscribe, | |
5594 | SCTP_SN_TYPE_BASE + i); | |
5595 | ||
5596 | if (copy_to_user(optval, &subscribe, len)) | |
1da177e4 | 5597 | return -EFAULT; |
2cc0eeb6 | 5598 | |
1da177e4 LT |
5599 | return 0; |
5600 | } | |
5601 | ||
5602 | /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE) | |
5603 | * | |
5604 | * This socket option is applicable to the UDP-style socket only. When | |
5605 | * set it will cause associations that are idle for more than the | |
5606 | * specified number of seconds to automatically close. An association | |
5607 | * being idle is defined an association that has NOT sent or received | |
5608 | * user data. The special value of '0' indicates that no automatic | |
5609 | * close of any associations should be performed. The option expects an | |
5610 | * integer defining the number of seconds of idle time before an | |
5611 | * association is closed. | |
5612 | */ | |
5613 | static int sctp_getsockopt_autoclose(struct sock *sk, int len, char __user *optval, int __user *optlen) | |
5614 | { | |
5615 | /* Applicable to UDP-style socket only */ | |
5616 | if (sctp_style(sk, TCP)) | |
5617 | return -EOPNOTSUPP; | |
408f22e8 | 5618 | if (len < sizeof(int)) |
1da177e4 | 5619 | return -EINVAL; |
408f22e8 NH |
5620 | len = sizeof(int); |
5621 | if (put_user(len, optlen)) | |
5622 | return -EFAULT; | |
b2ce04c2 | 5623 | if (put_user(sctp_sk(sk)->autoclose, (int __user *)optval)) |
1da177e4 LT |
5624 | return -EFAULT; |
5625 | return 0; | |
5626 | } | |
5627 | ||
5628 | /* Helper routine to branch off an association to a new socket. */ | |
0343c554 | 5629 | int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp) |
1da177e4 | 5630 | { |
0343c554 | 5631 | struct sctp_association *asoc = sctp_id2assoc(sk, id); |
299ee123 | 5632 | struct sctp_sock *sp = sctp_sk(sk); |
1da177e4 LT |
5633 | struct socket *sock; |
5634 | int err = 0; | |
5635 | ||
df80cd9b XL |
5636 | /* Do not peel off from one netns to another one. */ |
5637 | if (!net_eq(current->nsproxy->net_ns, sock_net(sk))) | |
5638 | return -EINVAL; | |
5639 | ||
0343c554 BP |
5640 | if (!asoc) |
5641 | return -EINVAL; | |
5642 | ||
1da177e4 LT |
5643 | /* An association cannot be branched off from an already peeled-off |
5644 | * socket, nor is this supported for tcp style sockets. | |
5645 | */ | |
5646 | if (!sctp_style(sk, UDP)) | |
5647 | return -EINVAL; | |
5648 | ||
5649 | /* Create a new socket. */ | |
5650 | err = sock_create(sk->sk_family, SOCK_SEQPACKET, IPPROTO_SCTP, &sock); | |
5651 | if (err < 0) | |
5652 | return err; | |
5653 | ||
914e1c8b | 5654 | sctp_copy_sock(sock->sk, sk, asoc); |
4f444308 VY |
5655 | |
5656 | /* Make peeled-off sockets more like 1-1 accepted sockets. | |
b7e10c25 RH |
5657 | * Set the daddr and initialize id to something more random and also |
5658 | * copy over any ip options. | |
4f444308 | 5659 | */ |
8467dda0 | 5660 | sp->pf->to_sk_daddr(&asoc->peer.primary_addr, sock->sk); |
b7e10c25 | 5661 | sp->pf->copy_ip_options(sk, sock->sk); |
914e1c8b VY |
5662 | |
5663 | /* Populate the fields of the newsk from the oldsk and migrate the | |
5664 | * asoc to the newsk. | |
5665 | */ | |
89664c62 XL |
5666 | err = sctp_sock_migrate(sk, sock->sk, asoc, |
5667 | SCTP_SOCKET_UDP_HIGH_BANDWIDTH); | |
5668 | if (err) { | |
5669 | sock_release(sock); | |
5670 | sock = NULL; | |
5671 | } | |
4f444308 | 5672 | |
1da177e4 LT |
5673 | *sockp = sock; |
5674 | ||
5675 | return err; | |
5676 | } | |
0343c554 | 5677 | EXPORT_SYMBOL(sctp_do_peeloff); |
1da177e4 | 5678 | |
2cb5c8e3 NH |
5679 | static int sctp_getsockopt_peeloff_common(struct sock *sk, sctp_peeloff_arg_t *peeloff, |
5680 | struct file **newfile, unsigned flags) | |
5681 | { | |
5682 | struct socket *newsock; | |
5683 | int retval; | |
5684 | ||
5685 | retval = sctp_do_peeloff(sk, peeloff->associd, &newsock); | |
5686 | if (retval < 0) | |
5687 | goto out; | |
5688 | ||
5689 | /* Map the socket to an unused fd that can be returned to the user. */ | |
5690 | retval = get_unused_fd_flags(flags & SOCK_CLOEXEC); | |
5691 | if (retval < 0) { | |
5692 | sock_release(newsock); | |
5693 | goto out; | |
5694 | } | |
5695 | ||
5696 | *newfile = sock_alloc_file(newsock, 0, NULL); | |
5697 | if (IS_ERR(*newfile)) { | |
5698 | put_unused_fd(retval); | |
2cb5c8e3 NH |
5699 | retval = PTR_ERR(*newfile); |
5700 | *newfile = NULL; | |
5701 | return retval; | |
5702 | } | |
5703 | ||
5704 | pr_debug("%s: sk:%p, newsk:%p, sd:%d\n", __func__, sk, newsock->sk, | |
5705 | retval); | |
5706 | ||
5707 | peeloff->sd = retval; | |
5708 | ||
5709 | if (flags & SOCK_NONBLOCK) | |
5710 | (*newfile)->f_flags |= O_NONBLOCK; | |
5711 | out: | |
5712 | return retval; | |
5713 | } | |
5714 | ||
1da177e4 LT |
5715 | static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval, int __user *optlen) |
5716 | { | |
5717 | sctp_peeloff_arg_t peeloff; | |
2cb5c8e3 | 5718 | struct file *newfile = NULL; |
1da177e4 | 5719 | int retval = 0; |
1da177e4 | 5720 | |
408f22e8 | 5721 | if (len < sizeof(sctp_peeloff_arg_t)) |
1da177e4 | 5722 | return -EINVAL; |
408f22e8 | 5723 | len = sizeof(sctp_peeloff_arg_t); |
1da177e4 LT |
5724 | if (copy_from_user(&peeloff, optval, len)) |
5725 | return -EFAULT; | |
5726 | ||
2cb5c8e3 | 5727 | retval = sctp_getsockopt_peeloff_common(sk, &peeloff, &newfile, 0); |
1da177e4 LT |
5728 | if (retval < 0) |
5729 | goto out; | |
5730 | ||
2cb5c8e3 NH |
5731 | /* Return the fd mapped to the new socket. */ |
5732 | if (put_user(len, optlen)) { | |
5733 | fput(newfile); | |
5734 | put_unused_fd(retval); | |
5735 | return -EFAULT; | |
1da177e4 LT |
5736 | } |
5737 | ||
2cb5c8e3 NH |
5738 | if (copy_to_user(optval, &peeloff, len)) { |
5739 | fput(newfile); | |
56b31d1c | 5740 | put_unused_fd(retval); |
2cb5c8e3 | 5741 | return -EFAULT; |
56b31d1c | 5742 | } |
2cb5c8e3 NH |
5743 | fd_install(retval, newfile); |
5744 | out: | |
5745 | return retval; | |
5746 | } | |
56b31d1c | 5747 | |
2cb5c8e3 NH |
5748 | static int sctp_getsockopt_peeloff_flags(struct sock *sk, int len, |
5749 | char __user *optval, int __user *optlen) | |
5750 | { | |
5751 | sctp_peeloff_flags_arg_t peeloff; | |
5752 | struct file *newfile = NULL; | |
5753 | int retval = 0; | |
5754 | ||
5755 | if (len < sizeof(sctp_peeloff_flags_arg_t)) | |
5756 | return -EINVAL; | |
5757 | len = sizeof(sctp_peeloff_flags_arg_t); | |
5758 | if (copy_from_user(&peeloff, optval, len)) | |
5759 | return -EFAULT; | |
5760 | ||
5761 | retval = sctp_getsockopt_peeloff_common(sk, &peeloff.p_arg, | |
5762 | &newfile, peeloff.flags); | |
5763 | if (retval < 0) | |
5764 | goto out; | |
1da177e4 LT |
5765 | |
5766 | /* Return the fd mapped to the new socket. */ | |
56b31d1c AV |
5767 | if (put_user(len, optlen)) { |
5768 | fput(newfile); | |
5769 | put_unused_fd(retval); | |
5770 | return -EFAULT; | |
5771 | } | |
2cb5c8e3 | 5772 | |
56b31d1c AV |
5773 | if (copy_to_user(optval, &peeloff, len)) { |
5774 | fput(newfile); | |
5775 | put_unused_fd(retval); | |
408f22e8 | 5776 | return -EFAULT; |
56b31d1c AV |
5777 | } |
5778 | fd_install(retval, newfile); | |
1da177e4 LT |
5779 | out: |
5780 | return retval; | |
5781 | } | |
5782 | ||
5783 | /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS) | |
5784 | * | |
5785 | * Applications can enable or disable heartbeats for any peer address of | |
5786 | * an association, modify an address's heartbeat interval, force a | |
5787 | * heartbeat to be sent immediately, and adjust the address's maximum | |
5788 | * number of retransmissions sent before an address is considered | |
5789 | * unreachable. The following structure is used to access and modify an | |
5790 | * address's parameters: | |
5791 | * | |
5792 | * struct sctp_paddrparams { | |
52ccb8e9 FF |
5793 | * sctp_assoc_t spp_assoc_id; |
5794 | * struct sockaddr_storage spp_address; | |
5795 | * uint32_t spp_hbinterval; | |
5796 | * uint16_t spp_pathmaxrxt; | |
5797 | * uint32_t spp_pathmtu; | |
5798 | * uint32_t spp_sackdelay; | |
5799 | * uint32_t spp_flags; | |
5800 | * }; | |
5801 | * | |
5802 | * spp_assoc_id - (one-to-many style socket) This is filled in the | |
5803 | * application, and identifies the association for | |
5804 | * this query. | |
1da177e4 LT |
5805 | * spp_address - This specifies which address is of interest. |
5806 | * spp_hbinterval - This contains the value of the heartbeat interval, | |
52ccb8e9 FF |
5807 | * in milliseconds. If a value of zero |
5808 | * is present in this field then no changes are to | |
5809 | * be made to this parameter. | |
1da177e4 LT |
5810 | * spp_pathmaxrxt - This contains the maximum number of |
5811 | * retransmissions before this address shall be | |
52ccb8e9 FF |
5812 | * considered unreachable. If a value of zero |
5813 | * is present in this field then no changes are to | |
5814 | * be made to this parameter. | |
5815 | * spp_pathmtu - When Path MTU discovery is disabled the value | |
5816 | * specified here will be the "fixed" path mtu. | |
5817 | * Note that if the spp_address field is empty | |
5818 | * then all associations on this address will | |
5819 | * have this fixed path mtu set upon them. | |
5820 | * | |
5821 | * spp_sackdelay - When delayed sack is enabled, this value specifies | |
5822 | * the number of milliseconds that sacks will be delayed | |
5823 | * for. This value will apply to all addresses of an | |
5824 | * association if the spp_address field is empty. Note | |
5825 | * also, that if delayed sack is enabled and this | |
5826 | * value is set to 0, no change is made to the last | |
5827 | * recorded delayed sack timer value. | |
5828 | * | |
5829 | * spp_flags - These flags are used to control various features | |
5830 | * on an association. The flag field may contain | |
5831 | * zero or more of the following options. | |
5832 | * | |
5833 | * SPP_HB_ENABLE - Enable heartbeats on the | |
5834 | * specified address. Note that if the address | |
5835 | * field is empty all addresses for the association | |
5836 | * have heartbeats enabled upon them. | |
5837 | * | |
5838 | * SPP_HB_DISABLE - Disable heartbeats on the | |
5839 | * speicifed address. Note that if the address | |
5840 | * field is empty all addresses for the association | |
5841 | * will have their heartbeats disabled. Note also | |
5842 | * that SPP_HB_ENABLE and SPP_HB_DISABLE are | |
5843 | * mutually exclusive, only one of these two should | |
5844 | * be specified. Enabling both fields will have | |
5845 | * undetermined results. | |
5846 | * | |
5847 | * SPP_HB_DEMAND - Request a user initiated heartbeat | |
5848 | * to be made immediately. | |
5849 | * | |
5850 | * SPP_PMTUD_ENABLE - This field will enable PMTU | |
5851 | * discovery upon the specified address. Note that | |
5852 | * if the address feild is empty then all addresses | |
5853 | * on the association are effected. | |
5854 | * | |
5855 | * SPP_PMTUD_DISABLE - This field will disable PMTU | |
5856 | * discovery upon the specified address. Note that | |
5857 | * if the address feild is empty then all addresses | |
5858 | * on the association are effected. Not also that | |
5859 | * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually | |
5860 | * exclusive. Enabling both will have undetermined | |
5861 | * results. | |
5862 | * | |
5863 | * SPP_SACKDELAY_ENABLE - Setting this flag turns | |
5864 | * on delayed sack. The time specified in spp_sackdelay | |
5865 | * is used to specify the sack delay for this address. Note | |
5866 | * that if spp_address is empty then all addresses will | |
5867 | * enable delayed sack and take on the sack delay | |
5868 | * value specified in spp_sackdelay. | |
5869 | * SPP_SACKDELAY_DISABLE - Setting this flag turns | |
5870 | * off delayed sack. If the spp_address field is blank then | |
5871 | * delayed sack is disabled for the entire association. Note | |
5872 | * also that this field is mutually exclusive to | |
5873 | * SPP_SACKDELAY_ENABLE, setting both will have undefined | |
5874 | * results. | |
0b0dce7a XL |
5875 | * |
5876 | * SPP_IPV6_FLOWLABEL: Setting this flag enables the | |
5877 | * setting of the IPV6 flow label value. The value is | |
5878 | * contained in the spp_ipv6_flowlabel field. | |
5879 | * Upon retrieval, this flag will be set to indicate that | |
5880 | * the spp_ipv6_flowlabel field has a valid value returned. | |
5881 | * If a specific destination address is set (in the | |
5882 | * spp_address field), then the value returned is that of | |
5883 | * the address. If just an association is specified (and | |
5884 | * no address), then the association's default flow label | |
5885 | * is returned. If neither an association nor a destination | |
5886 | * is specified, then the socket's default flow label is | |
5887 | * returned. For non-IPv6 sockets, this flag will be left | |
5888 | * cleared. | |
5889 | * | |
5890 | * SPP_DSCP: Setting this flag enables the setting of the | |
5891 | * Differentiated Services Code Point (DSCP) value | |
5892 | * associated with either the association or a specific | |
5893 | * address. The value is obtained in the spp_dscp field. | |
5894 | * Upon retrieval, this flag will be set to indicate that | |
5895 | * the spp_dscp field has a valid value returned. If a | |
5896 | * specific destination address is set when called (in the | |
5897 | * spp_address field), then that specific destination | |
5898 | * address's DSCP value is returned. If just an association | |
5899 | * is specified, then the association's default DSCP is | |
5900 | * returned. If neither an association nor a destination is | |
5901 | * specified, then the socket's default DSCP is returned. | |
5902 | * | |
5903 | * spp_ipv6_flowlabel | |
5904 | * - This field is used in conjunction with the | |
5905 | * SPP_IPV6_FLOWLABEL flag and contains the IPv6 flow label. | |
5906 | * The 20 least significant bits are used for the flow | |
5907 | * label. This setting has precedence over any IPv6-layer | |
5908 | * setting. | |
5909 | * | |
5910 | * spp_dscp - This field is used in conjunction with the SPP_DSCP flag | |
5911 | * and contains the DSCP. The 6 most significant bits are | |
5912 | * used for the DSCP. This setting has precedence over any | |
5913 | * IPv4- or IPv6- layer setting. | |
1da177e4 LT |
5914 | */ |
5915 | static int sctp_getsockopt_peer_addr_params(struct sock *sk, int len, | |
52ccb8e9 | 5916 | char __user *optval, int __user *optlen) |
1da177e4 | 5917 | { |
52ccb8e9 FF |
5918 | struct sctp_paddrparams params; |
5919 | struct sctp_transport *trans = NULL; | |
5920 | struct sctp_association *asoc = NULL; | |
5921 | struct sctp_sock *sp = sctp_sk(sk); | |
1da177e4 | 5922 | |
0b0dce7a XL |
5923 | if (len >= sizeof(params)) |
5924 | len = sizeof(params); | |
5925 | else if (len >= ALIGN(offsetof(struct sctp_paddrparams, | |
5926 | spp_ipv6_flowlabel), 4)) | |
5927 | len = ALIGN(offsetof(struct sctp_paddrparams, | |
5928 | spp_ipv6_flowlabel), 4); | |
5929 | else | |
1da177e4 | 5930 | return -EINVAL; |
0b0dce7a | 5931 | |
1da177e4 LT |
5932 | if (copy_from_user(¶ms, optval, len)) |
5933 | return -EFAULT; | |
5934 | ||
52ccb8e9 FF |
5935 | /* If an address other than INADDR_ANY is specified, and |
5936 | * no transport is found, then the request is invalid. | |
1da177e4 | 5937 | */ |
cb3f837b | 5938 | if (!sctp_is_any(sk, (union sctp_addr *)¶ms.spp_address)) { |
52ccb8e9 FF |
5939 | trans = sctp_addr_id2transport(sk, ¶ms.spp_address, |
5940 | params.spp_assoc_id); | |
5941 | if (!trans) { | |
bb33381d | 5942 | pr_debug("%s: failed no transport\n", __func__); |
52ccb8e9 FF |
5943 | return -EINVAL; |
5944 | } | |
1da177e4 LT |
5945 | } |
5946 | ||
b99e5e02 XL |
5947 | /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the |
5948 | * socket is a one to many style socket, and an association | |
5949 | * was not found, then the id was invalid. | |
52ccb8e9 FF |
5950 | */ |
5951 | asoc = sctp_id2assoc(sk, params.spp_assoc_id); | |
b99e5e02 XL |
5952 | if (!asoc && params.spp_assoc_id != SCTP_FUTURE_ASSOC && |
5953 | sctp_style(sk, UDP)) { | |
bb33381d | 5954 | pr_debug("%s: failed no association\n", __func__); |
1da177e4 | 5955 | return -EINVAL; |
52ccb8e9 | 5956 | } |
1da177e4 | 5957 | |
52ccb8e9 FF |
5958 | if (trans) { |
5959 | /* Fetch transport values. */ | |
5960 | params.spp_hbinterval = jiffies_to_msecs(trans->hbinterval); | |
5961 | params.spp_pathmtu = trans->pathmtu; | |
5962 | params.spp_pathmaxrxt = trans->pathmaxrxt; | |
5963 | params.spp_sackdelay = jiffies_to_msecs(trans->sackdelay); | |
5964 | ||
5965 | /*draft-11 doesn't say what to return in spp_flags*/ | |
5966 | params.spp_flags = trans->param_flags; | |
0b0dce7a XL |
5967 | if (trans->flowlabel & SCTP_FLOWLABEL_SET_MASK) { |
5968 | params.spp_ipv6_flowlabel = trans->flowlabel & | |
5969 | SCTP_FLOWLABEL_VAL_MASK; | |
5970 | params.spp_flags |= SPP_IPV6_FLOWLABEL; | |
5971 | } | |
5972 | if (trans->dscp & SCTP_DSCP_SET_MASK) { | |
5973 | params.spp_dscp = trans->dscp & SCTP_DSCP_VAL_MASK; | |
5974 | params.spp_flags |= SPP_DSCP; | |
5975 | } | |
52ccb8e9 FF |
5976 | } else if (asoc) { |
5977 | /* Fetch association values. */ | |
5978 | params.spp_hbinterval = jiffies_to_msecs(asoc->hbinterval); | |
5979 | params.spp_pathmtu = asoc->pathmtu; | |
5980 | params.spp_pathmaxrxt = asoc->pathmaxrxt; | |
5981 | params.spp_sackdelay = jiffies_to_msecs(asoc->sackdelay); | |
5982 | ||
5983 | /*draft-11 doesn't say what to return in spp_flags*/ | |
5984 | params.spp_flags = asoc->param_flags; | |
0b0dce7a XL |
5985 | if (asoc->flowlabel & SCTP_FLOWLABEL_SET_MASK) { |
5986 | params.spp_ipv6_flowlabel = asoc->flowlabel & | |
5987 | SCTP_FLOWLABEL_VAL_MASK; | |
5988 | params.spp_flags |= SPP_IPV6_FLOWLABEL; | |
5989 | } | |
5990 | if (asoc->dscp & SCTP_DSCP_SET_MASK) { | |
5991 | params.spp_dscp = asoc->dscp & SCTP_DSCP_VAL_MASK; | |
5992 | params.spp_flags |= SPP_DSCP; | |
5993 | } | |
52ccb8e9 FF |
5994 | } else { |
5995 | /* Fetch socket values. */ | |
5996 | params.spp_hbinterval = sp->hbinterval; | |
5997 | params.spp_pathmtu = sp->pathmtu; | |
5998 | params.spp_sackdelay = sp->sackdelay; | |
5999 | params.spp_pathmaxrxt = sp->pathmaxrxt; | |
1da177e4 | 6000 | |
52ccb8e9 FF |
6001 | /*draft-11 doesn't say what to return in spp_flags*/ |
6002 | params.spp_flags = sp->param_flags; | |
0b0dce7a XL |
6003 | if (sp->flowlabel & SCTP_FLOWLABEL_SET_MASK) { |
6004 | params.spp_ipv6_flowlabel = sp->flowlabel & | |
6005 | SCTP_FLOWLABEL_VAL_MASK; | |
6006 | params.spp_flags |= SPP_IPV6_FLOWLABEL; | |
6007 | } | |
6008 | if (sp->dscp & SCTP_DSCP_SET_MASK) { | |
6009 | params.spp_dscp = sp->dscp & SCTP_DSCP_VAL_MASK; | |
6010 | params.spp_flags |= SPP_DSCP; | |
6011 | } | |
52ccb8e9 | 6012 | } |
1da177e4 | 6013 | |
1da177e4 LT |
6014 | if (copy_to_user(optval, ¶ms, len)) |
6015 | return -EFAULT; | |
6016 | ||
6017 | if (put_user(len, optlen)) | |
6018 | return -EFAULT; | |
6019 | ||
6020 | return 0; | |
6021 | } | |
6022 | ||
d364d927 WY |
6023 | /* |
6024 | * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK) | |
6025 | * | |
6026 | * This option will effect the way delayed acks are performed. This | |
6027 | * option allows you to get or set the delayed ack time, in | |
6028 | * milliseconds. It also allows changing the delayed ack frequency. | |
6029 | * Changing the frequency to 1 disables the delayed sack algorithm. If | |
6030 | * the assoc_id is 0, then this sets or gets the endpoints default | |
6031 | * values. If the assoc_id field is non-zero, then the set or get | |
6032 | * effects the specified association for the one to many model (the | |
6033 | * assoc_id field is ignored by the one to one model). Note that if | |
6034 | * sack_delay or sack_freq are 0 when setting this option, then the | |
6035 | * current values will remain unchanged. | |
6036 | * | |
6037 | * struct sctp_sack_info { | |
6038 | * sctp_assoc_t sack_assoc_id; | |
6039 | * uint32_t sack_delay; | |
6040 | * uint32_t sack_freq; | |
6041 | * }; | |
7708610b | 6042 | * |
d364d927 WY |
6043 | * sack_assoc_id - This parameter, indicates which association the user |
6044 | * is performing an action upon. Note that if this field's value is | |
6045 | * zero then the endpoints default value is changed (effecting future | |
6046 | * associations only). | |
7708610b | 6047 | * |
d364d927 WY |
6048 | * sack_delay - This parameter contains the number of milliseconds that |
6049 | * the user is requesting the delayed ACK timer be set to. Note that | |
6050 | * this value is defined in the standard to be between 200 and 500 | |
6051 | * milliseconds. | |
7708610b | 6052 | * |
d364d927 WY |
6053 | * sack_freq - This parameter contains the number of packets that must |
6054 | * be received before a sack is sent without waiting for the delay | |
6055 | * timer to expire. The default value for this is 2, setting this | |
6056 | * value to 1 will disable the delayed sack algorithm. | |
7708610b | 6057 | */ |
d364d927 | 6058 | static int sctp_getsockopt_delayed_ack(struct sock *sk, int len, |
7708610b FF |
6059 | char __user *optval, |
6060 | int __user *optlen) | |
6061 | { | |
d364d927 | 6062 | struct sctp_sack_info params; |
7708610b FF |
6063 | struct sctp_association *asoc = NULL; |
6064 | struct sctp_sock *sp = sctp_sk(sk); | |
6065 | ||
d364d927 WY |
6066 | if (len >= sizeof(struct sctp_sack_info)) { |
6067 | len = sizeof(struct sctp_sack_info); | |
7708610b | 6068 | |
d364d927 WY |
6069 | if (copy_from_user(¶ms, optval, len)) |
6070 | return -EFAULT; | |
6071 | } else if (len == sizeof(struct sctp_assoc_value)) { | |
94f65193 | 6072 | pr_warn_ratelimited(DEPRECATED |
f916ec96 | 6073 | "%s (pid %d) " |
94f65193 | 6074 | "Use of struct sctp_assoc_value in delayed_ack socket option.\n" |
f916ec96 NH |
6075 | "Use struct sctp_sack_info instead\n", |
6076 | current->comm, task_pid_nr(current)); | |
d364d927 WY |
6077 | if (copy_from_user(¶ms, optval, len)) |
6078 | return -EFAULT; | |
6079 | } else | |
cb3f837b | 6080 | return -EINVAL; |
7708610b | 6081 | |
9c5829e1 XL |
6082 | /* Get association, if sack_assoc_id != SCTP_FUTURE_ASSOC and the |
6083 | * socket is a one to many style socket, and an association | |
6084 | * was not found, then the id was invalid. | |
d808ad9a | 6085 | */ |
d364d927 | 6086 | asoc = sctp_id2assoc(sk, params.sack_assoc_id); |
9c5829e1 XL |
6087 | if (!asoc && params.sack_assoc_id != SCTP_FUTURE_ASSOC && |
6088 | sctp_style(sk, UDP)) | |
7708610b FF |
6089 | return -EINVAL; |
6090 | ||
6091 | if (asoc) { | |
6092 | /* Fetch association values. */ | |
d364d927 | 6093 | if (asoc->param_flags & SPP_SACKDELAY_ENABLE) { |
9c5829e1 | 6094 | params.sack_delay = jiffies_to_msecs(asoc->sackdelay); |
d364d927 WY |
6095 | params.sack_freq = asoc->sackfreq; |
6096 | ||
6097 | } else { | |
6098 | params.sack_delay = 0; | |
6099 | params.sack_freq = 1; | |
6100 | } | |
7708610b FF |
6101 | } else { |
6102 | /* Fetch socket values. */ | |
d364d927 WY |
6103 | if (sp->param_flags & SPP_SACKDELAY_ENABLE) { |
6104 | params.sack_delay = sp->sackdelay; | |
6105 | params.sack_freq = sp->sackfreq; | |
6106 | } else { | |
6107 | params.sack_delay = 0; | |
6108 | params.sack_freq = 1; | |
6109 | } | |
7708610b FF |
6110 | } |
6111 | ||
6112 | if (copy_to_user(optval, ¶ms, len)) | |
6113 | return -EFAULT; | |
6114 | ||
6115 | if (put_user(len, optlen)) | |
6116 | return -EFAULT; | |
6117 | ||
6118 | return 0; | |
6119 | } | |
6120 | ||
1da177e4 LT |
6121 | /* 7.1.3 Initialization Parameters (SCTP_INITMSG) |
6122 | * | |
6123 | * Applications can specify protocol parameters for the default association | |
6124 | * initialization. The option name argument to setsockopt() and getsockopt() | |
6125 | * is SCTP_INITMSG. | |
6126 | * | |
6127 | * Setting initialization parameters is effective only on an unconnected | |
6128 | * socket (for UDP-style sockets only future associations are effected | |
6129 | * by the change). With TCP-style sockets, this option is inherited by | |
6130 | * sockets derived from a listener socket. | |
6131 | */ | |
6132 | static int sctp_getsockopt_initmsg(struct sock *sk, int len, char __user *optval, int __user *optlen) | |
6133 | { | |
408f22e8 | 6134 | if (len < sizeof(struct sctp_initmsg)) |
1da177e4 | 6135 | return -EINVAL; |
408f22e8 NH |
6136 | len = sizeof(struct sctp_initmsg); |
6137 | if (put_user(len, optlen)) | |
6138 | return -EFAULT; | |
1da177e4 LT |
6139 | if (copy_to_user(optval, &sctp_sk(sk)->initmsg, len)) |
6140 | return -EFAULT; | |
6141 | return 0; | |
6142 | } | |
6143 | ||