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47505b8b | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
60c778b2 | 2 | /* SCTP kernel implementation |
1da177e4 LT |
3 | * (C) Copyright IBM Corp. 2001, 2004 |
4 | * Copyright (c) 1999-2000 Cisco, Inc. | |
5 | * Copyright (c) 1999-2001 Motorola, Inc. | |
6 | * Copyright (c) 2001-2003 Intel Corp. | |
7 | * Copyright (c) 2001-2002 Nokia, Inc. | |
8 | * Copyright (c) 2001 La Monte H.P. Yarroll | |
9 | * | |
60c778b2 | 10 | * This file is part of the SCTP kernel implementation |
1da177e4 LT |
11 | * |
12 | * These functions interface with the sockets layer to implement the | |
13 | * SCTP Extensions for the Sockets API. | |
14 | * | |
15 | * Note that the descriptions from the specification are USER level | |
16 | * functions--this file is the functions which populate the struct proto | |
17 | * for SCTP which is the BOTTOM of the sockets interface. | |
18 | * | |
1da177e4 LT |
19 | * Please send any bug reports or fixes you make to the |
20 | * email address(es): | |
91705c61 | 21 | * lksctp developers <linux-sctp@vger.kernel.org> |
1da177e4 | 22 | * |
1da177e4 LT |
23 | * Written or modified by: |
24 | * La Monte H.P. Yarroll <piggy@acm.org> | |
25 | * Narasimha Budihal <narsi@refcode.org> | |
26 | * Karl Knutson <karl@athena.chicago.il.us> | |
27 | * Jon Grimm <jgrimm@us.ibm.com> | |
28 | * Xingang Guo <xingang.guo@intel.com> | |
29 | * Daisy Chang <daisyc@us.ibm.com> | |
30 | * Sridhar Samudrala <samudrala@us.ibm.com> | |
31 | * Inaky Perez-Gonzalez <inaky.gonzalez@intel.com> | |
32 | * Ardelle Fan <ardelle.fan@intel.com> | |
33 | * Ryan Layer <rmlayer@us.ibm.com> | |
34 | * Anup Pemmaiah <pemmaiah@cc.usu.edu> | |
35 | * Kevin Gao <kevin.gao@intel.com> | |
1da177e4 LT |
36 | */ |
37 | ||
145ce502 JP |
38 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
39 | ||
5821c769 | 40 | #include <crypto/hash.h> |
1da177e4 LT |
41 | #include <linux/types.h> |
42 | #include <linux/kernel.h> | |
43 | #include <linux/wait.h> | |
44 | #include <linux/time.h> | |
3f07c014 | 45 | #include <linux/sched/signal.h> |
1da177e4 | 46 | #include <linux/ip.h> |
4fc268d2 | 47 | #include <linux/capability.h> |
1da177e4 LT |
48 | #include <linux/fcntl.h> |
49 | #include <linux/poll.h> | |
50 | #include <linux/init.h> | |
5a0e3ad6 | 51 | #include <linux/slab.h> |
56b31d1c | 52 | #include <linux/file.h> |
ffd59393 | 53 | #include <linux/compat.h> |
0eb71a9d | 54 | #include <linux/rhashtable.h> |
1da177e4 LT |
55 | |
56 | #include <net/ip.h> | |
57 | #include <net/icmp.h> | |
58 | #include <net/route.h> | |
59 | #include <net/ipv6.h> | |
60 | #include <net/inet_common.h> | |
8465a5fc | 61 | #include <net/busy_poll.h> |
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> |
1da177e4 | 70 | |
1da177e4 | 71 | /* Forward declarations for internal helper functions. */ |
cd305c74 | 72 | static bool sctp_writeable(struct sock *sk); |
1da177e4 | 73 | static void sctp_wfree(struct sk_buff *skb); |
cea0cc80 | 74 | static int sctp_wait_for_sndbuf(struct sctp_association *asoc, long *timeo_p, |
a0ff6600 | 75 | size_t msg_len); |
26ac8e5f | 76 | static int sctp_wait_for_packet(struct sock *sk, int *err, long *timeo_p); |
1da177e4 LT |
77 | static int sctp_wait_for_connect(struct sctp_association *, long *timeo_p); |
78 | static int sctp_wait_for_accept(struct sock *sk, long timeo); | |
79 | static void sctp_wait_for_close(struct sock *sk, long timeo); | |
0a2fbac1 | 80 | static void sctp_destruct_sock(struct sock *sk); |
1da177e4 LT |
81 | static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt, |
82 | union sctp_addr *addr, int len); | |
83 | static int sctp_bindx_add(struct sock *, struct sockaddr *, int); | |
84 | static int sctp_bindx_rem(struct sock *, struct sockaddr *, int); | |
85 | static int sctp_send_asconf_add_ip(struct sock *, struct sockaddr *, int); | |
86 | static int sctp_send_asconf_del_ip(struct sock *, struct sockaddr *, int); | |
87 | static int sctp_send_asconf(struct sctp_association *asoc, | |
88 | struct sctp_chunk *chunk); | |
89 | static int sctp_do_bind(struct sock *, union sctp_addr *, int); | |
90 | static int sctp_autobind(struct sock *sk); | |
89664c62 XL |
91 | static int sctp_sock_migrate(struct sock *oldsk, struct sock *newsk, |
92 | struct sctp_association *assoc, | |
93 | enum sctp_socket_type type); | |
1da177e4 | 94 | |
06044751 | 95 | static unsigned long sctp_memory_pressure; |
8d987e5c | 96 | static atomic_long_t sctp_memory_allocated; |
0defbb0a | 97 | static DEFINE_PER_CPU(int, sctp_memory_per_cpu_fw_alloc); |
1748376b | 98 | struct percpu_counter sctp_sockets_allocated; |
4d93df0a | 99 | |
5c52ba17 | 100 | static void sctp_enter_memory_pressure(struct sock *sk) |
4d93df0a NH |
101 | { |
102 | sctp_memory_pressure = 1; | |
103 | } | |
104 | ||
105 | ||
1da177e4 LT |
106 | /* Get the sndbuf space available at the time on the association. */ |
107 | static inline int sctp_wspace(struct sctp_association *asoc) | |
108 | { | |
cd305c74 | 109 | struct sock *sk = asoc->base.sk; |
1da177e4 | 110 | |
cd305c74 XL |
111 | return asoc->ep->sndbuf_policy ? sk->sk_sndbuf - asoc->sndbuf_used |
112 | : sk_stream_wspace(sk); | |
1da177e4 LT |
113 | } |
114 | ||
115 | /* Increment the used sndbuf space count of the corresponding association by | |
116 | * the size of the outgoing data chunk. | |
117 | * Also, set the skb destructor for sndbuf accounting later. | |
118 | * | |
119 | * Since it is always 1-1 between chunk and skb, and also a new skb is always | |
120 | * allocated for chunk bundling in sctp_packet_transmit(), we can use the | |
121 | * destructor in the data chunk skb for the purpose of the sndbuf space | |
122 | * tracking. | |
123 | */ | |
124 | static inline void sctp_set_owner_w(struct sctp_chunk *chunk) | |
125 | { | |
126 | struct sctp_association *asoc = chunk->asoc; | |
127 | struct sock *sk = asoc->base.sk; | |
128 | ||
129 | /* The sndbuf space is tracked per association. */ | |
130 | sctp_association_hold(asoc); | |
131 | ||
1b1e0bc9 XL |
132 | if (chunk->shkey) |
133 | sctp_auth_shkey_hold(chunk->shkey); | |
134 | ||
4eb701df NH |
135 | skb_set_owner_w(chunk->skb, sk); |
136 | ||
1da177e4 LT |
137 | chunk->skb->destructor = sctp_wfree; |
138 | /* Save the chunk pointer in skb for sctp_wfree to use later. */ | |
f869c912 | 139 | skb_shinfo(chunk->skb)->destructor_arg = chunk; |
1da177e4 | 140 | |
14afee4b | 141 | refcount_add(sizeof(struct sctp_chunk), &sk->sk_wmem_alloc); |
605c0ac1 XL |
142 | asoc->sndbuf_used += chunk->skb->truesize + sizeof(struct sctp_chunk); |
143 | sk->sk_wmem_queued += chunk->skb->truesize + sizeof(struct sctp_chunk); | |
3ab224be | 144 | sk_mem_charge(sk, chunk->skb->truesize); |
1da177e4 LT |
145 | } |
146 | ||
d04adf1b XL |
147 | static void sctp_clear_owner_w(struct sctp_chunk *chunk) |
148 | { | |
149 | skb_orphan(chunk->skb); | |
150 | } | |
151 | ||
5c3e82fe QH |
152 | #define traverse_and_process() \ |
153 | do { \ | |
154 | msg = chunk->msg; \ | |
155 | if (msg == prev_msg) \ | |
156 | continue; \ | |
157 | list_for_each_entry(c, &msg->chunks, frag_list) { \ | |
158 | if ((clear && asoc->base.sk == c->skb->sk) || \ | |
159 | (!clear && asoc->base.sk != c->skb->sk)) \ | |
160 | cb(c); \ | |
161 | } \ | |
162 | prev_msg = msg; \ | |
163 | } while (0) | |
164 | ||
d04adf1b | 165 | static void sctp_for_each_tx_datachunk(struct sctp_association *asoc, |
5c3e82fe | 166 | bool clear, |
d04adf1b XL |
167 | void (*cb)(struct sctp_chunk *)) |
168 | ||
169 | { | |
5c3e82fe | 170 | struct sctp_datamsg *msg, *prev_msg = NULL; |
d04adf1b | 171 | struct sctp_outq *q = &asoc->outqueue; |
5c3e82fe | 172 | struct sctp_chunk *chunk, *c; |
d04adf1b | 173 | struct sctp_transport *t; |
d04adf1b XL |
174 | |
175 | list_for_each_entry(t, &asoc->peer.transport_addr_list, transports) | |
176 | list_for_each_entry(chunk, &t->transmitted, transmitted_list) | |
5c3e82fe | 177 | traverse_and_process(); |
d04adf1b | 178 | |
a8dd3979 | 179 | list_for_each_entry(chunk, &q->retransmit, transmitted_list) |
5c3e82fe | 180 | traverse_and_process(); |
d04adf1b | 181 | |
a8dd3979 | 182 | list_for_each_entry(chunk, &q->sacked, transmitted_list) |
5c3e82fe | 183 | traverse_and_process(); |
d04adf1b | 184 | |
a8dd3979 | 185 | list_for_each_entry(chunk, &q->abandoned, transmitted_list) |
5c3e82fe | 186 | traverse_and_process(); |
d04adf1b XL |
187 | |
188 | list_for_each_entry(chunk, &q->out_chunk_list, list) | |
5c3e82fe | 189 | traverse_and_process(); |
d04adf1b XL |
190 | } |
191 | ||
13228238 XL |
192 | static void sctp_for_each_rx_skb(struct sctp_association *asoc, struct sock *sk, |
193 | void (*cb)(struct sk_buff *, struct sock *)) | |
194 | ||
195 | { | |
196 | struct sk_buff *skb, *tmp; | |
197 | ||
198 | sctp_skb_for_each(skb, &asoc->ulpq.lobby, tmp) | |
199 | cb(skb, sk); | |
200 | ||
201 | sctp_skb_for_each(skb, &asoc->ulpq.reasm, tmp) | |
202 | cb(skb, sk); | |
203 | ||
204 | sctp_skb_for_each(skb, &asoc->ulpq.reasm_uo, tmp) | |
205 | cb(skb, sk); | |
206 | } | |
207 | ||
1da177e4 LT |
208 | /* Verify that this is a valid address. */ |
209 | static inline int sctp_verify_addr(struct sock *sk, union sctp_addr *addr, | |
210 | int len) | |
211 | { | |
212 | struct sctp_af *af; | |
213 | ||
214 | /* Verify basic sockaddr. */ | |
215 | af = sctp_sockaddr_af(sctp_sk(sk), addr, len); | |
216 | if (!af) | |
217 | return -EINVAL; | |
218 | ||
219 | /* Is this a valid SCTP address? */ | |
5636bef7 | 220 | if (!af->addr_valid(addr, sctp_sk(sk), NULL)) |
1da177e4 LT |
221 | return -EINVAL; |
222 | ||
223 | if (!sctp_sk(sk)->pf->send_verify(sctp_sk(sk), (addr))) | |
224 | return -EINVAL; | |
225 | ||
226 | return 0; | |
227 | } | |
228 | ||
229 | /* Look up the association by its id. If this is not a UDP-style | |
230 | * socket, the ID field is always ignored. | |
231 | */ | |
232 | struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id) | |
233 | { | |
234 | struct sctp_association *asoc = NULL; | |
235 | ||
236 | /* If this is not a UDP-style socket, assoc id should be ignored. */ | |
237 | if (!sctp_style(sk, UDP)) { | |
238 | /* Return NULL if the socket state is not ESTABLISHED. It | |
239 | * could be a TCP-style listening socket or a socket which | |
240 | * hasn't yet called connect() to establish an association. | |
241 | */ | |
e5b13f34 | 242 | if (!sctp_sstate(sk, ESTABLISHED) && !sctp_sstate(sk, CLOSING)) |
1da177e4 LT |
243 | return NULL; |
244 | ||
245 | /* Get the first and the only association from the list. */ | |
246 | if (!list_empty(&sctp_sk(sk)->ep->asocs)) | |
247 | asoc = list_entry(sctp_sk(sk)->ep->asocs.next, | |
248 | struct sctp_association, asocs); | |
249 | return asoc; | |
250 | } | |
251 | ||
252 | /* Otherwise this is a UDP-style socket. */ | |
80df2704 | 253 | if (id <= SCTP_ALL_ASSOC) |
1da177e4 LT |
254 | return NULL; |
255 | ||
256 | spin_lock_bh(&sctp_assocs_id_lock); | |
257 | asoc = (struct sctp_association *)idr_find(&sctp_assocs_id, (int)id); | |
b336deca MRL |
258 | if (asoc && (asoc->base.sk != sk || asoc->base.dead)) |
259 | asoc = NULL; | |
1da177e4 LT |
260 | spin_unlock_bh(&sctp_assocs_id_lock); |
261 | ||
1da177e4 LT |
262 | return asoc; |
263 | } | |
264 | ||
265 | /* Look up the transport from an address and an assoc id. If both address and | |
266 | * id are specified, the associations matching the address and the id should be | |
267 | * the same. | |
268 | */ | |
269 | static struct sctp_transport *sctp_addr_id2transport(struct sock *sk, | |
270 | struct sockaddr_storage *addr, | |
271 | sctp_assoc_t id) | |
272 | { | |
273 | struct sctp_association *addr_asoc = NULL, *id_asoc = NULL; | |
6f29a130 | 274 | struct sctp_af *af = sctp_get_af_specific(addr->ss_family); |
1da177e4 | 275 | union sctp_addr *laddr = (union sctp_addr *)addr; |
6f29a130 XL |
276 | struct sctp_transport *transport; |
277 | ||
912964ea | 278 | if (!af || sctp_verify_addr(sk, laddr, af->sockaddr_len)) |
6f29a130 | 279 | return NULL; |
1da177e4 | 280 | |
1da177e4 | 281 | addr_asoc = sctp_endpoint_lookup_assoc(sctp_sk(sk)->ep, |
cd4ff034 | 282 | laddr, |
1da177e4 | 283 | &transport); |
1da177e4 LT |
284 | |
285 | if (!addr_asoc) | |
286 | return NULL; | |
287 | ||
288 | id_asoc = sctp_id2assoc(sk, id); | |
289 | if (id_asoc && (id_asoc != addr_asoc)) | |
290 | return NULL; | |
291 | ||
299ee123 | 292 | sctp_get_pf_specific(sk->sk_family)->addr_to_user(sctp_sk(sk), |
1da177e4 LT |
293 | (union sctp_addr *)addr); |
294 | ||
295 | return transport; | |
296 | } | |
297 | ||
298 | /* API 3.1.2 bind() - UDP Style Syntax | |
299 | * The syntax of bind() is, | |
300 | * | |
301 | * ret = bind(int sd, struct sockaddr *addr, int addrlen); | |
302 | * | |
303 | * sd - the socket descriptor returned by socket(). | |
304 | * addr - the address structure (struct sockaddr_in or struct | |
305 | * sockaddr_in6 [RFC 2553]), | |
306 | * addr_len - the size of the address structure. | |
307 | */ | |
dda91928 | 308 | static int sctp_bind(struct sock *sk, struct sockaddr *addr, int addr_len) |
1da177e4 LT |
309 | { |
310 | int retval = 0; | |
311 | ||
048ed4b6 | 312 | lock_sock(sk); |
1da177e4 | 313 | |
bb33381d DB |
314 | pr_debug("%s: sk:%p, addr:%p, addr_len:%d\n", __func__, sk, |
315 | addr, addr_len); | |
1da177e4 LT |
316 | |
317 | /* Disallow binding twice. */ | |
318 | if (!sctp_sk(sk)->ep->base.bind_addr.port) | |
3f7a87d2 | 319 | retval = sctp_do_bind(sk, (union sctp_addr *)addr, |
1da177e4 LT |
320 | addr_len); |
321 | else | |
322 | retval = -EINVAL; | |
323 | ||
048ed4b6 | 324 | release_sock(sk); |
1da177e4 LT |
325 | |
326 | return retval; | |
327 | } | |
328 | ||
8e2ef6ab | 329 | static int sctp_get_port_local(struct sock *, union sctp_addr *); |
1da177e4 LT |
330 | |
331 | /* Verify this is a valid sockaddr. */ | |
332 | static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt, | |
333 | union sctp_addr *addr, int len) | |
334 | { | |
335 | struct sctp_af *af; | |
336 | ||
337 | /* Check minimum size. */ | |
338 | if (len < sizeof (struct sockaddr)) | |
339 | return NULL; | |
340 | ||
c5006b8a XL |
341 | if (!opt->pf->af_supported(addr->sa.sa_family, opt)) |
342 | return NULL; | |
343 | ||
81e98370 ED |
344 | if (addr->sa.sa_family == AF_INET6) { |
345 | if (len < SIN6_LEN_RFC2133) | |
346 | return NULL; | |
347 | /* V4 mapped address are really of AF_INET family */ | |
348 | if (ipv6_addr_v4mapped(&addr->v6.sin6_addr) && | |
349 | !opt->pf->af_supported(AF_INET, opt)) | |
350 | return NULL; | |
351 | } | |
1da177e4 LT |
352 | |
353 | /* If we get this far, af is valid. */ | |
354 | af = sctp_get_af_specific(addr->sa.sa_family); | |
355 | ||
356 | if (len < af->sockaddr_len) | |
357 | return NULL; | |
358 | ||
359 | return af; | |
360 | } | |
361 | ||
34e5b011 XL |
362 | static void sctp_auto_asconf_init(struct sctp_sock *sp) |
363 | { | |
364 | struct net *net = sock_net(&sp->inet.sk); | |
365 | ||
366 | if (net->sctp.default_auto_asconf) { | |
367 | spin_lock(&net->sctp.addr_wq_lock); | |
368 | list_add_tail(&sp->auto_asconf_list, &net->sctp.auto_asconf_splist); | |
369 | spin_unlock(&net->sctp.addr_wq_lock); | |
370 | sp->do_auto_asconf = 1; | |
371 | } | |
372 | } | |
373 | ||
1da177e4 | 374 | /* Bind a local address either to an endpoint or to an association. */ |
dda91928 | 375 | static int sctp_do_bind(struct sock *sk, union sctp_addr *addr, int len) |
1da177e4 | 376 | { |
3594698a | 377 | struct net *net = sock_net(sk); |
1da177e4 LT |
378 | struct sctp_sock *sp = sctp_sk(sk); |
379 | struct sctp_endpoint *ep = sp->ep; | |
380 | struct sctp_bind_addr *bp = &ep->base.bind_addr; | |
381 | struct sctp_af *af; | |
382 | unsigned short snum; | |
383 | int ret = 0; | |
384 | ||
1da177e4 LT |
385 | /* Common sockaddr verification. */ |
386 | af = sctp_sockaddr_af(sp, addr, len); | |
3f7a87d2 | 387 | if (!af) { |
bb33381d DB |
388 | pr_debug("%s: sk:%p, newaddr:%p, len:%d EINVAL\n", |
389 | __func__, sk, addr, len); | |
1da177e4 | 390 | return -EINVAL; |
3f7a87d2 FF |
391 | } |
392 | ||
393 | snum = ntohs(addr->v4.sin_port); | |
394 | ||
bb33381d DB |
395 | pr_debug("%s: sk:%p, new addr:%pISc, port:%d, new port:%d, len:%d\n", |
396 | __func__, sk, &addr->sa, bp->port, snum, len); | |
1da177e4 LT |
397 | |
398 | /* PF specific bind() address verification. */ | |
399 | if (!sp->pf->bind_verify(sp, addr)) | |
400 | return -EADDRNOTAVAIL; | |
401 | ||
8b358056 VY |
402 | /* We must either be unbound, or bind to the same port. |
403 | * It's OK to allow 0 ports if we are already bound. | |
404 | * We'll just inhert an already bound port in this case | |
405 | */ | |
406 | if (bp->port) { | |
407 | if (!snum) | |
408 | snum = bp->port; | |
409 | else if (snum != bp->port) { | |
bb33381d DB |
410 | pr_debug("%s: new port %d doesn't match existing port " |
411 | "%d\n", __func__, snum, bp->port); | |
8b358056 VY |
412 | return -EINVAL; |
413 | } | |
1da177e4 LT |
414 | } |
415 | ||
82f31ebf | 416 | if (snum && inet_port_requires_bind_service(net, snum) && |
3594698a | 417 | !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE)) |
1da177e4 LT |
418 | return -EACCES; |
419 | ||
4e54064e VY |
420 | /* See if the address matches any of the addresses we may have |
421 | * already bound before checking against other endpoints. | |
422 | */ | |
423 | if (sctp_bind_addr_match(bp, addr, sp)) | |
424 | return -EINVAL; | |
425 | ||
1da177e4 LT |
426 | /* Make sure we are allowed to bind here. |
427 | * The function sctp_get_port_local() does duplicate address | |
428 | * detection. | |
429 | */ | |
2772b495 | 430 | addr->v4.sin_port = htons(snum); |
e0e4b8de | 431 | if (sctp_get_port_local(sk, addr)) |
4e54064e | 432 | return -EADDRINUSE; |
1da177e4 LT |
433 | |
434 | /* Refresh ephemeral port. */ | |
34e5b011 | 435 | if (!bp->port) { |
c720c7e8 | 436 | bp->port = inet_sk(sk)->inet_num; |
34e5b011 XL |
437 | sctp_auto_asconf_init(sp); |
438 | } | |
1da177e4 | 439 | |
559cf710 VY |
440 | /* Add the address to the bind address list. |
441 | * Use GFP_ATOMIC since BHs will be disabled. | |
442 | */ | |
133800d1 MRL |
443 | ret = sctp_add_bind_addr(bp, addr, af->sockaddr_len, |
444 | SCTP_ADDR_SRC, GFP_ATOMIC); | |
1da177e4 | 445 | |
29b99f54 MW |
446 | if (ret) { |
447 | sctp_put_port(sk); | |
448 | return ret; | |
1da177e4 | 449 | } |
29b99f54 MW |
450 | /* Copy back into socket for getsockname() use. */ |
451 | inet_sk(sk)->inet_sport = htons(inet_sk(sk)->inet_num); | |
452 | sp->pf->to_sk_saddr(addr, sk); | |
1da177e4 LT |
453 | |
454 | return ret; | |
455 | } | |
456 | ||
457 | /* ADDIP Section 4.1.1 Congestion Control of ASCONF Chunks | |
458 | * | |
d808ad9a | 459 | * R1) One and only one ASCONF Chunk MAY be in transit and unacknowledged |
1da177e4 | 460 | * at any one time. If a sender, after sending an ASCONF chunk, decides |
d808ad9a | 461 | * it needs to transfer another ASCONF Chunk, it MUST wait until the |
1da177e4 | 462 | * ASCONF-ACK Chunk returns from the previous ASCONF Chunk before sending a |
d808ad9a YH |
463 | * subsequent ASCONF. Note this restriction binds each side, so at any |
464 | * time two ASCONF may be in-transit on any given association (one sent | |
1da177e4 LT |
465 | * from each endpoint). |
466 | */ | |
467 | static int sctp_send_asconf(struct sctp_association *asoc, | |
468 | struct sctp_chunk *chunk) | |
469 | { | |
4e7696d9 | 470 | int retval = 0; |
1da177e4 LT |
471 | |
472 | /* If there is an outstanding ASCONF chunk, queue it for later | |
473 | * transmission. | |
d808ad9a | 474 | */ |
1da177e4 | 475 | if (asoc->addip_last_asconf) { |
79af02c2 | 476 | list_add_tail(&chunk->list, &asoc->addip_chunk_list); |
d808ad9a | 477 | goto out; |
1da177e4 LT |
478 | } |
479 | ||
480 | /* Hold the chunk until an ASCONF_ACK is received. */ | |
481 | sctp_chunk_hold(chunk); | |
4e7696d9 | 482 | retval = sctp_primitive_ASCONF(asoc->base.net, asoc, chunk); |
1da177e4 LT |
483 | if (retval) |
484 | sctp_chunk_free(chunk); | |
485 | else | |
486 | asoc->addip_last_asconf = chunk; | |
487 | ||
488 | out: | |
489 | return retval; | |
490 | } | |
491 | ||
492 | /* Add a list of addresses as bind addresses to local endpoint or | |
493 | * association. | |
494 | * | |
495 | * Basically run through each address specified in the addrs/addrcnt | |
496 | * array/length pair, determine if it is IPv6 or IPv4 and call | |
497 | * sctp_do_bind() on it. | |
498 | * | |
499 | * If any of them fails, then the operation will be reversed and the | |
500 | * ones that were added will be removed. | |
501 | * | |
502 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
503 | */ | |
04675210 | 504 | static int sctp_bindx_add(struct sock *sk, struct sockaddr *addrs, int addrcnt) |
1da177e4 LT |
505 | { |
506 | int cnt; | |
507 | int retval = 0; | |
508 | void *addr_buf; | |
509 | struct sockaddr *sa_addr; | |
510 | struct sctp_af *af; | |
511 | ||
bb33381d DB |
512 | pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", __func__, sk, |
513 | addrs, addrcnt); | |
1da177e4 LT |
514 | |
515 | addr_buf = addrs; | |
516 | for (cnt = 0; cnt < addrcnt; cnt++) { | |
517 | /* The list may contain either IPv4 or IPv6 address; | |
518 | * determine the address length for walking thru the list. | |
519 | */ | |
ea110733 | 520 | sa_addr = addr_buf; |
1da177e4 LT |
521 | af = sctp_get_af_specific(sa_addr->sa_family); |
522 | if (!af) { | |
523 | retval = -EINVAL; | |
524 | goto err_bindx_add; | |
525 | } | |
526 | ||
d808ad9a | 527 | retval = sctp_do_bind(sk, (union sctp_addr *)sa_addr, |
1da177e4 LT |
528 | af->sockaddr_len); |
529 | ||
530 | addr_buf += af->sockaddr_len; | |
531 | ||
532 | err_bindx_add: | |
533 | if (retval < 0) { | |
534 | /* Failed. Cleanup the ones that have been added */ | |
535 | if (cnt > 0) | |
536 | sctp_bindx_rem(sk, addrs, cnt); | |
537 | return retval; | |
538 | } | |
539 | } | |
540 | ||
541 | return retval; | |
542 | } | |
543 | ||
544 | /* Send an ASCONF chunk with Add IP address parameters to all the peers of the | |
545 | * associations that are part of the endpoint indicating that a list of local | |
546 | * addresses are added to the endpoint. | |
547 | * | |
d808ad9a | 548 | * If any of the addresses is already in the bind address list of the |
1da177e4 LT |
549 | * association, we do not send the chunk for that association. But it will not |
550 | * affect other associations. | |
551 | * | |
552 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
553 | */ | |
d808ad9a | 554 | static int sctp_send_asconf_add_ip(struct sock *sk, |
1da177e4 LT |
555 | struct sockaddr *addrs, |
556 | int addrcnt) | |
557 | { | |
558 | struct sctp_sock *sp; | |
559 | struct sctp_endpoint *ep; | |
560 | struct sctp_association *asoc; | |
561 | struct sctp_bind_addr *bp; | |
562 | struct sctp_chunk *chunk; | |
563 | struct sctp_sockaddr_entry *laddr; | |
564 | union sctp_addr *addr; | |
dc022a98 | 565 | union sctp_addr saveaddr; |
1da177e4 LT |
566 | void *addr_buf; |
567 | struct sctp_af *af; | |
1da177e4 LT |
568 | struct list_head *p; |
569 | int i; | |
570 | int retval = 0; | |
571 | ||
1da177e4 LT |
572 | sp = sctp_sk(sk); |
573 | ep = sp->ep; | |
574 | ||
4e27428f XL |
575 | if (!ep->asconf_enable) |
576 | return retval; | |
577 | ||
bb33381d DB |
578 | pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", |
579 | __func__, sk, addrs, addrcnt); | |
1da177e4 | 580 | |
9dbc15f0 | 581 | list_for_each_entry(asoc, &ep->asocs, asocs) { |
1da177e4 LT |
582 | if (!asoc->peer.asconf_capable) |
583 | continue; | |
584 | ||
585 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_ADD_IP) | |
586 | continue; | |
587 | ||
588 | if (!sctp_state(asoc, ESTABLISHED)) | |
589 | continue; | |
590 | ||
591 | /* Check if any address in the packed array of addresses is | |
d808ad9a YH |
592 | * in the bind address list of the association. If so, |
593 | * do not send the asconf chunk to its peer, but continue with | |
1da177e4 LT |
594 | * other associations. |
595 | */ | |
596 | addr_buf = addrs; | |
597 | for (i = 0; i < addrcnt; i++) { | |
ea110733 | 598 | addr = addr_buf; |
1da177e4 LT |
599 | af = sctp_get_af_specific(addr->v4.sin_family); |
600 | if (!af) { | |
601 | retval = -EINVAL; | |
602 | goto out; | |
603 | } | |
604 | ||
605 | if (sctp_assoc_lookup_laddr(asoc, addr)) | |
606 | break; | |
607 | ||
608 | addr_buf += af->sockaddr_len; | |
609 | } | |
610 | if (i < addrcnt) | |
611 | continue; | |
612 | ||
559cf710 VY |
613 | /* Use the first valid address in bind addr list of |
614 | * association as Address Parameter of ASCONF CHUNK. | |
1da177e4 | 615 | */ |
1da177e4 LT |
616 | bp = &asoc->base.bind_addr; |
617 | p = bp->address_list.next; | |
618 | laddr = list_entry(p, struct sctp_sockaddr_entry, list); | |
5ae955cf | 619 | chunk = sctp_make_asconf_update_ip(asoc, &laddr->a, addrs, |
1da177e4 LT |
620 | addrcnt, SCTP_PARAM_ADD_IP); |
621 | if (!chunk) { | |
622 | retval = -ENOMEM; | |
623 | goto out; | |
624 | } | |
625 | ||
dc022a98 SS |
626 | /* Add the new addresses to the bind address list with |
627 | * use_as_src set to 0. | |
1da177e4 | 628 | */ |
dc022a98 SS |
629 | addr_buf = addrs; |
630 | for (i = 0; i < addrcnt; i++) { | |
ea110733 | 631 | addr = addr_buf; |
dc022a98 SS |
632 | af = sctp_get_af_specific(addr->v4.sin_family); |
633 | memcpy(&saveaddr, addr, af->sockaddr_len); | |
f57d96b2 | 634 | retval = sctp_add_bind_addr(bp, &saveaddr, |
133800d1 | 635 | sizeof(saveaddr), |
f57d96b2 | 636 | SCTP_ADDR_NEW, GFP_ATOMIC); |
dc022a98 SS |
637 | addr_buf += af->sockaddr_len; |
638 | } | |
8a07eb0a MH |
639 | if (asoc->src_out_of_asoc_ok) { |
640 | struct sctp_transport *trans; | |
641 | ||
642 | list_for_each_entry(trans, | |
643 | &asoc->peer.transport_addr_list, transports) { | |
8a07eb0a MH |
644 | trans->cwnd = min(4*asoc->pathmtu, max_t(__u32, |
645 | 2*asoc->pathmtu, 4380)); | |
646 | trans->ssthresh = asoc->peer.i.a_rwnd; | |
647 | trans->rto = asoc->rto_initial; | |
196d6759 | 648 | sctp_max_rto(asoc, trans); |
8a07eb0a | 649 | trans->rtt = trans->srtt = trans->rttvar = 0; |
6e91b578 | 650 | /* Clear the source and route cache */ |
8a07eb0a | 651 | sctp_transport_route(trans, NULL, |
6e91b578 | 652 | sctp_sk(asoc->base.sk)); |
8a07eb0a MH |
653 | } |
654 | } | |
655 | retval = sctp_send_asconf(asoc, chunk); | |
1da177e4 LT |
656 | } |
657 | ||
658 | out: | |
659 | return retval; | |
660 | } | |
661 | ||
662 | /* Remove a list of addresses from bind addresses list. Do not remove the | |
663 | * last address. | |
664 | * | |
665 | * Basically run through each address specified in the addrs/addrcnt | |
666 | * array/length pair, determine if it is IPv6 or IPv4 and call | |
667 | * sctp_del_bind() on it. | |
668 | * | |
669 | * If any of them fails, then the operation will be reversed and the | |
670 | * ones that were removed will be added back. | |
671 | * | |
672 | * At least one address has to be left; if only one address is | |
673 | * available, the operation will return -EBUSY. | |
674 | * | |
675 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
676 | */ | |
04675210 | 677 | static int sctp_bindx_rem(struct sock *sk, struct sockaddr *addrs, int addrcnt) |
1da177e4 LT |
678 | { |
679 | struct sctp_sock *sp = sctp_sk(sk); | |
680 | struct sctp_endpoint *ep = sp->ep; | |
681 | int cnt; | |
682 | struct sctp_bind_addr *bp = &ep->base.bind_addr; | |
683 | int retval = 0; | |
1da177e4 | 684 | void *addr_buf; |
c9a08505 | 685 | union sctp_addr *sa_addr; |
1da177e4 LT |
686 | struct sctp_af *af; |
687 | ||
bb33381d DB |
688 | pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", |
689 | __func__, sk, addrs, addrcnt); | |
1da177e4 LT |
690 | |
691 | addr_buf = addrs; | |
692 | for (cnt = 0; cnt < addrcnt; cnt++) { | |
693 | /* If the bind address list is empty or if there is only one | |
694 | * bind address, there is nothing more to be removed (we need | |
695 | * at least one address here). | |
696 | */ | |
697 | if (list_empty(&bp->address_list) || | |
698 | (sctp_list_single_entry(&bp->address_list))) { | |
699 | retval = -EBUSY; | |
700 | goto err_bindx_rem; | |
701 | } | |
702 | ||
ea110733 | 703 | sa_addr = addr_buf; |
c9a08505 | 704 | af = sctp_get_af_specific(sa_addr->sa.sa_family); |
1da177e4 LT |
705 | if (!af) { |
706 | retval = -EINVAL; | |
707 | goto err_bindx_rem; | |
708 | } | |
0304ff8a PG |
709 | |
710 | if (!af->addr_valid(sa_addr, sp, NULL)) { | |
711 | retval = -EADDRNOTAVAIL; | |
712 | goto err_bindx_rem; | |
713 | } | |
714 | ||
ee9cbaca VY |
715 | if (sa_addr->v4.sin_port && |
716 | sa_addr->v4.sin_port != htons(bp->port)) { | |
1da177e4 LT |
717 | retval = -EINVAL; |
718 | goto err_bindx_rem; | |
719 | } | |
720 | ||
ee9cbaca VY |
721 | if (!sa_addr->v4.sin_port) |
722 | sa_addr->v4.sin_port = htons(bp->port); | |
723 | ||
1da177e4 LT |
724 | /* FIXME - There is probably a need to check if sk->sk_saddr and |
725 | * sk->sk_rcv_addr are currently set to one of the addresses to | |
726 | * be removed. This is something which needs to be looked into | |
727 | * when we are fixing the outstanding issues with multi-homing | |
728 | * socket routing and failover schemes. Refer to comments in | |
729 | * sctp_do_bind(). -daisy | |
730 | */ | |
0ed90fb0 | 731 | retval = sctp_del_bind_addr(bp, sa_addr); |
1da177e4 LT |
732 | |
733 | addr_buf += af->sockaddr_len; | |
734 | err_bindx_rem: | |
735 | if (retval < 0) { | |
736 | /* Failed. Add the ones that has been removed back */ | |
737 | if (cnt > 0) | |
738 | sctp_bindx_add(sk, addrs, cnt); | |
739 | return retval; | |
740 | } | |
741 | } | |
742 | ||
743 | return retval; | |
744 | } | |
745 | ||
746 | /* Send an ASCONF chunk with Delete IP address parameters to all the peers of | |
747 | * the associations that are part of the endpoint indicating that a list of | |
748 | * local addresses are removed from the endpoint. | |
749 | * | |
d808ad9a | 750 | * If any of the addresses is already in the bind address list of the |
1da177e4 LT |
751 | * association, we do not send the chunk for that association. But it will not |
752 | * affect other associations. | |
753 | * | |
754 | * Only sctp_setsockopt_bindx() is supposed to call this function. | |
755 | */ | |
756 | static int sctp_send_asconf_del_ip(struct sock *sk, | |
757 | struct sockaddr *addrs, | |
758 | int addrcnt) | |
759 | { | |
760 | struct sctp_sock *sp; | |
761 | struct sctp_endpoint *ep; | |
762 | struct sctp_association *asoc; | |
dc022a98 | 763 | struct sctp_transport *transport; |
1da177e4 LT |
764 | struct sctp_bind_addr *bp; |
765 | struct sctp_chunk *chunk; | |
766 | union sctp_addr *laddr; | |
767 | void *addr_buf; | |
768 | struct sctp_af *af; | |
dc022a98 | 769 | struct sctp_sockaddr_entry *saddr; |
1da177e4 LT |
770 | int i; |
771 | int retval = 0; | |
8a07eb0a | 772 | int stored = 0; |
1da177e4 | 773 | |
8a07eb0a | 774 | chunk = NULL; |
1da177e4 LT |
775 | sp = sctp_sk(sk); |
776 | ep = sp->ep; | |
777 | ||
4e27428f XL |
778 | if (!ep->asconf_enable) |
779 | return retval; | |
780 | ||
bb33381d DB |
781 | pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", |
782 | __func__, sk, addrs, addrcnt); | |
1da177e4 | 783 | |
9dbc15f0 | 784 | list_for_each_entry(asoc, &ep->asocs, asocs) { |
1da177e4 LT |
785 | |
786 | if (!asoc->peer.asconf_capable) | |
787 | continue; | |
788 | ||
789 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_DEL_IP) | |
790 | continue; | |
791 | ||
792 | if (!sctp_state(asoc, ESTABLISHED)) | |
793 | continue; | |
794 | ||
795 | /* Check if any address in the packed array of addresses is | |
d808ad9a | 796 | * not present in the bind address list of the association. |
1da177e4 LT |
797 | * If so, do not send the asconf chunk to its peer, but |
798 | * continue with other associations. | |
799 | */ | |
800 | addr_buf = addrs; | |
801 | for (i = 0; i < addrcnt; i++) { | |
ea110733 | 802 | laddr = addr_buf; |
1da177e4 LT |
803 | af = sctp_get_af_specific(laddr->v4.sin_family); |
804 | if (!af) { | |
805 | retval = -EINVAL; | |
806 | goto out; | |
807 | } | |
808 | ||
809 | if (!sctp_assoc_lookup_laddr(asoc, laddr)) | |
810 | break; | |
811 | ||
812 | addr_buf += af->sockaddr_len; | |
813 | } | |
814 | if (i < addrcnt) | |
815 | continue; | |
816 | ||
817 | /* Find one address in the association's bind address list | |
818 | * that is not in the packed array of addresses. This is to | |
819 | * make sure that we do not delete all the addresses in the | |
820 | * association. | |
821 | */ | |
1da177e4 LT |
822 | bp = &asoc->base.bind_addr; |
823 | laddr = sctp_find_unmatch_addr(bp, (union sctp_addr *)addrs, | |
824 | addrcnt, sp); | |
8a07eb0a MH |
825 | if ((laddr == NULL) && (addrcnt == 1)) { |
826 | if (asoc->asconf_addr_del_pending) | |
827 | continue; | |
828 | asoc->asconf_addr_del_pending = | |
829 | kzalloc(sizeof(union sctp_addr), GFP_ATOMIC); | |
6d65e5ee MH |
830 | if (asoc->asconf_addr_del_pending == NULL) { |
831 | retval = -ENOMEM; | |
832 | goto out; | |
833 | } | |
8a07eb0a MH |
834 | asoc->asconf_addr_del_pending->sa.sa_family = |
835 | addrs->sa_family; | |
836 | asoc->asconf_addr_del_pending->v4.sin_port = | |
837 | htons(bp->port); | |
838 | if (addrs->sa_family == AF_INET) { | |
839 | struct sockaddr_in *sin; | |
840 | ||
841 | sin = (struct sockaddr_in *)addrs; | |
842 | asoc->asconf_addr_del_pending->v4.sin_addr.s_addr = sin->sin_addr.s_addr; | |
843 | } else if (addrs->sa_family == AF_INET6) { | |
844 | struct sockaddr_in6 *sin6; | |
845 | ||
846 | sin6 = (struct sockaddr_in6 *)addrs; | |
4e3fd7a0 | 847 | asoc->asconf_addr_del_pending->v6.sin6_addr = sin6->sin6_addr; |
8a07eb0a | 848 | } |
bb33381d DB |
849 | |
850 | pr_debug("%s: keep the last address asoc:%p %pISc at %p\n", | |
851 | __func__, asoc, &asoc->asconf_addr_del_pending->sa, | |
852 | asoc->asconf_addr_del_pending); | |
853 | ||
8a07eb0a MH |
854 | asoc->src_out_of_asoc_ok = 1; |
855 | stored = 1; | |
856 | goto skip_mkasconf; | |
857 | } | |
1da177e4 | 858 | |
88362ad8 DB |
859 | if (laddr == NULL) |
860 | return -EINVAL; | |
861 | ||
559cf710 VY |
862 | /* We do not need RCU protection throughout this loop |
863 | * because this is done under a socket lock from the | |
864 | * setsockopt call. | |
865 | */ | |
1da177e4 LT |
866 | chunk = sctp_make_asconf_update_ip(asoc, laddr, addrs, addrcnt, |
867 | SCTP_PARAM_DEL_IP); | |
868 | if (!chunk) { | |
869 | retval = -ENOMEM; | |
870 | goto out; | |
871 | } | |
872 | ||
8a07eb0a | 873 | skip_mkasconf: |
dc022a98 SS |
874 | /* Reset use_as_src flag for the addresses in the bind address |
875 | * list that are to be deleted. | |
876 | */ | |
dc022a98 SS |
877 | addr_buf = addrs; |
878 | for (i = 0; i < addrcnt; i++) { | |
ea110733 | 879 | laddr = addr_buf; |
dc022a98 | 880 | af = sctp_get_af_specific(laddr->v4.sin_family); |
559cf710 | 881 | list_for_each_entry(saddr, &bp->address_list, list) { |
5f242a13 | 882 | if (sctp_cmp_addr_exact(&saddr->a, laddr)) |
f57d96b2 | 883 | saddr->state = SCTP_ADDR_DEL; |
dc022a98 SS |
884 | } |
885 | addr_buf += af->sockaddr_len; | |
886 | } | |
1da177e4 | 887 | |
dc022a98 SS |
888 | /* Update the route and saddr entries for all the transports |
889 | * as some of the addresses in the bind address list are | |
890 | * about to be deleted and cannot be used as source addresses. | |
1da177e4 | 891 | */ |
9dbc15f0 RD |
892 | list_for_each_entry(transport, &asoc->peer.transport_addr_list, |
893 | transports) { | |
dc022a98 SS |
894 | sctp_transport_route(transport, NULL, |
895 | sctp_sk(asoc->base.sk)); | |
896 | } | |
897 | ||
8a07eb0a MH |
898 | if (stored) |
899 | /* We don't need to transmit ASCONF */ | |
900 | continue; | |
dc022a98 | 901 | retval = sctp_send_asconf(asoc, chunk); |
1da177e4 LT |
902 | } |
903 | out: | |
904 | return retval; | |
905 | } | |
906 | ||
9f7d653b MH |
907 | /* set addr events to assocs in the endpoint. ep and addr_wq must be locked */ |
908 | int sctp_asconf_mgmt(struct sctp_sock *sp, struct sctp_sockaddr_entry *addrw) | |
909 | { | |
910 | struct sock *sk = sctp_opt2sk(sp); | |
911 | union sctp_addr *addr; | |
912 | struct sctp_af *af; | |
913 | ||
914 | /* It is safe to write port space in caller. */ | |
915 | addr = &addrw->a; | |
916 | addr->v4.sin_port = htons(sp->ep->base.bind_addr.port); | |
917 | af = sctp_get_af_specific(addr->sa.sa_family); | |
918 | if (!af) | |
919 | return -EINVAL; | |
920 | if (sctp_verify_addr(sk, addr, af->sockaddr_len)) | |
921 | return -EINVAL; | |
922 | ||
923 | if (addrw->state == SCTP_ADDR_NEW) | |
924 | return sctp_send_asconf_add_ip(sk, (struct sockaddr *)addr, 1); | |
925 | else | |
926 | return sctp_send_asconf_del_ip(sk, (struct sockaddr *)addr, 1); | |
927 | } | |
928 | ||
1da177e4 LT |
929 | /* Helper for tunneling sctp_bindx() requests through sctp_setsockopt() |
930 | * | |
931 | * API 8.1 | |
932 | * int sctp_bindx(int sd, struct sockaddr *addrs, int addrcnt, | |
933 | * int flags); | |
934 | * | |
935 | * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses. | |
936 | * If the sd is an IPv6 socket, the addresses passed can either be IPv4 | |
937 | * or IPv6 addresses. | |
938 | * | |
939 | * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see | |
940 | * Section 3.1.2 for this usage. | |
941 | * | |
942 | * addrs is a pointer to an array of one or more socket addresses. Each | |
943 | * address is contained in its appropriate structure (i.e. struct | |
944 | * sockaddr_in or struct sockaddr_in6) the family of the address type | |
23c435f7 | 945 | * must be used to distinguish the address length (note that this |
1da177e4 LT |
946 | * representation is termed a "packed array" of addresses). The caller |
947 | * specifies the number of addresses in the array with addrcnt. | |
948 | * | |
949 | * On success, sctp_bindx() returns 0. On failure, sctp_bindx() returns | |
950 | * -1, and sets errno to the appropriate error code. | |
951 | * | |
952 | * For SCTP, the port given in each socket address must be the same, or | |
953 | * sctp_bindx() will fail, setting errno to EINVAL. | |
954 | * | |
955 | * The flags parameter is formed from the bitwise OR of zero or more of | |
956 | * the following currently defined flags: | |
957 | * | |
958 | * SCTP_BINDX_ADD_ADDR | |
959 | * | |
960 | * SCTP_BINDX_REM_ADDR | |
961 | * | |
962 | * SCTP_BINDX_ADD_ADDR directs SCTP to add the given addresses to the | |
963 | * association, and SCTP_BINDX_REM_ADDR directs SCTP to remove the given | |
964 | * addresses from the association. The two flags are mutually exclusive; | |
965 | * if both are given, sctp_bindx() will fail with EINVAL. A caller may | |
966 | * not remove all addresses from an association; sctp_bindx() will | |
967 | * reject such an attempt with EINVAL. | |
968 | * | |
969 | * An application can use sctp_bindx(SCTP_BINDX_ADD_ADDR) to associate | |
970 | * additional addresses with an endpoint after calling bind(). Or use | |
971 | * sctp_bindx(SCTP_BINDX_REM_ADDR) to remove some addresses a listening | |
972 | * socket is associated with so that no new association accepted will be | |
973 | * associated with those addresses. If the endpoint supports dynamic | |
974 | * address a SCTP_BINDX_REM_ADDR or SCTP_BINDX_ADD_ADDR may cause a | |
975 | * endpoint to send the appropriate message to the peer to change the | |
976 | * peers address lists. | |
977 | * | |
978 | * Adding and removing addresses from a connected association is | |
979 | * optional functionality. Implementations that do not support this | |
980 | * functionality should return EOPNOTSUPP. | |
981 | * | |
982 | * Basically do nothing but copying the addresses from user to kernel | |
983 | * land and invoking either sctp_bindx_add() or sctp_bindx_rem() on the sk. | |
3f7a87d2 FF |
984 | * This is used for tunneling the sctp_bindx() request through sctp_setsockopt() |
985 | * from userspace. | |
1da177e4 | 986 | * |
1da177e4 LT |
987 | * On exit there is no need to do sockfd_put(), sys_setsockopt() does |
988 | * it. | |
989 | * | |
990 | * sk The sk of the socket | |
05bfd366 | 991 | * addrs The pointer to the addresses |
1da177e4 LT |
992 | * addrssize Size of the addrs buffer |
993 | * op Operation to perform (add or remove, see the flags of | |
994 | * sctp_bindx) | |
995 | * | |
996 | * Returns 0 if ok, <0 errno code on error. | |
997 | */ | |
8c7517f5 CH |
998 | static int sctp_setsockopt_bindx(struct sock *sk, struct sockaddr *addrs, |
999 | int addrs_size, int op) | |
1da177e4 | 1000 | { |
1da177e4 LT |
1001 | int err; |
1002 | int addrcnt = 0; | |
1003 | int walk_size = 0; | |
1004 | struct sockaddr *sa_addr; | |
05bfd366 | 1005 | void *addr_buf = addrs; |
1da177e4 LT |
1006 | struct sctp_af *af; |
1007 | ||
bb33381d | 1008 | pr_debug("%s: sk:%p addrs:%p addrs_size:%d opt:%d\n", |
8c7517f5 | 1009 | __func__, sk, addr_buf, addrs_size, op); |
1da177e4 LT |
1010 | |
1011 | if (unlikely(addrs_size <= 0)) | |
1012 | return -EINVAL; | |
1013 | ||
d808ad9a | 1014 | /* Walk through the addrs buffer and count the number of addresses. */ |
1da177e4 | 1015 | while (walk_size < addrs_size) { |
05bfd366 | 1016 | if (walk_size + sizeof(sa_family_t) > addrs_size) |
d7e0d19a | 1017 | return -EINVAL; |
d7e0d19a | 1018 | |
ea110733 | 1019 | sa_addr = addr_buf; |
1da177e4 LT |
1020 | af = sctp_get_af_specific(sa_addr->sa_family); |
1021 | ||
1022 | /* If the address family is not supported or if this address | |
1023 | * causes the address buffer to overflow return EINVAL. | |
d808ad9a | 1024 | */ |
05bfd366 | 1025 | if (!af || (walk_size + af->sockaddr_len) > addrs_size) |
1da177e4 | 1026 | return -EINVAL; |
1da177e4 LT |
1027 | addrcnt++; |
1028 | addr_buf += af->sockaddr_len; | |
1029 | walk_size += af->sockaddr_len; | |
1030 | } | |
1031 | ||
1032 | /* Do the work. */ | |
1033 | switch (op) { | |
1034 | case SCTP_BINDX_ADD_ADDR: | |
2277c7cd RH |
1035 | /* Allow security module to validate bindx addresses. */ |
1036 | err = security_sctp_bind_connect(sk, SCTP_SOCKOPT_BINDX_ADD, | |
05bfd366 | 1037 | addrs, addrs_size); |
2277c7cd | 1038 | if (err) |
05bfd366 CH |
1039 | return err; |
1040 | err = sctp_bindx_add(sk, addrs, addrcnt); | |
1da177e4 | 1041 | if (err) |
05bfd366 CH |
1042 | return err; |
1043 | return sctp_send_asconf_add_ip(sk, addrs, addrcnt); | |
1da177e4 | 1044 | case SCTP_BINDX_REM_ADDR: |
05bfd366 | 1045 | err = sctp_bindx_rem(sk, addrs, addrcnt); |
1da177e4 | 1046 | if (err) |
05bfd366 CH |
1047 | return err; |
1048 | return sctp_send_asconf_del_ip(sk, addrs, addrcnt); | |
1da177e4 LT |
1049 | |
1050 | default: | |
05bfd366 | 1051 | return -EINVAL; |
3ff50b79 | 1052 | } |
05bfd366 | 1053 | } |
1da177e4 | 1054 | |
c0425a42 CH |
1055 | static int sctp_bind_add(struct sock *sk, struct sockaddr *addrs, |
1056 | int addrlen) | |
1057 | { | |
1058 | int err; | |
1059 | ||
1060 | lock_sock(sk); | |
8c7517f5 | 1061 | err = sctp_setsockopt_bindx(sk, addrs, addrlen, SCTP_BINDX_ADD_ADDR); |
c0425a42 CH |
1062 | release_sock(sk); |
1063 | return err; | |
1064 | } | |
1065 | ||
f26f9951 XL |
1066 | static int sctp_connect_new_asoc(struct sctp_endpoint *ep, |
1067 | const union sctp_addr *daddr, | |
1068 | const struct sctp_initmsg *init, | |
1069 | struct sctp_transport **tp) | |
1070 | { | |
1071 | struct sctp_association *asoc; | |
1072 | struct sock *sk = ep->base.sk; | |
1073 | struct net *net = sock_net(sk); | |
1074 | enum sctp_scope scope; | |
1075 | int err; | |
1076 | ||
1077 | if (sctp_endpoint_is_peeled_off(ep, daddr)) | |
1078 | return -EADDRNOTAVAIL; | |
1079 | ||
1080 | if (!ep->base.bind_addr.port) { | |
1081 | if (sctp_autobind(sk)) | |
1082 | return -EAGAIN; | |
1083 | } else { | |
82f31ebf | 1084 | if (inet_port_requires_bind_service(net, ep->base.bind_addr.port) && |
f26f9951 XL |
1085 | !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE)) |
1086 | return -EACCES; | |
1087 | } | |
1088 | ||
1089 | scope = sctp_scope(daddr); | |
1090 | asoc = sctp_association_new(ep, sk, scope, GFP_KERNEL); | |
1091 | if (!asoc) | |
1092 | return -ENOMEM; | |
1093 | ||
1094 | err = sctp_assoc_set_bind_addr_from_ep(asoc, scope, GFP_KERNEL); | |
1095 | if (err < 0) | |
1096 | goto free; | |
1097 | ||
1098 | *tp = sctp_assoc_add_peer(asoc, daddr, GFP_KERNEL, SCTP_UNKNOWN); | |
1099 | if (!*tp) { | |
1100 | err = -ENOMEM; | |
1101 | goto free; | |
1102 | } | |
1103 | ||
1104 | if (!init) | |
1105 | return 0; | |
1106 | ||
1107 | if (init->sinit_num_ostreams) { | |
1108 | __u16 outcnt = init->sinit_num_ostreams; | |
1109 | ||
1110 | asoc->c.sinit_num_ostreams = outcnt; | |
1111 | /* outcnt has been changed, need to re-init stream */ | |
1112 | err = sctp_stream_init(&asoc->stream, outcnt, 0, GFP_KERNEL); | |
1113 | if (err) | |
1114 | goto free; | |
1115 | } | |
1116 | ||
1117 | if (init->sinit_max_instreams) | |
1118 | asoc->c.sinit_max_instreams = init->sinit_max_instreams; | |
1119 | ||
1120 | if (init->sinit_max_attempts) | |
1121 | asoc->max_init_attempts = init->sinit_max_attempts; | |
1122 | ||
1123 | if (init->sinit_max_init_timeo) | |
1124 | asoc->max_init_timeo = | |
1125 | msecs_to_jiffies(init->sinit_max_init_timeo); | |
1126 | ||
1127 | return 0; | |
1128 | free: | |
1129 | sctp_association_free(asoc); | |
1130 | return err; | |
1131 | } | |
1132 | ||
a64e59c7 XL |
1133 | static int sctp_connect_add_peer(struct sctp_association *asoc, |
1134 | union sctp_addr *daddr, int addr_len) | |
1135 | { | |
1136 | struct sctp_endpoint *ep = asoc->ep; | |
1137 | struct sctp_association *old; | |
1138 | struct sctp_transport *t; | |
1139 | int err; | |
1140 | ||
1141 | err = sctp_verify_addr(ep->base.sk, daddr, addr_len); | |
1142 | if (err) | |
1143 | return err; | |
1144 | ||
1145 | old = sctp_endpoint_lookup_assoc(ep, daddr, &t); | |
1146 | if (old && old != asoc) | |
1147 | return old->state >= SCTP_STATE_ESTABLISHED ? -EISCONN | |
1148 | : -EALREADY; | |
1149 | ||
1150 | if (sctp_endpoint_is_peeled_off(ep, daddr)) | |
1151 | return -EADDRNOTAVAIL; | |
1152 | ||
1153 | t = sctp_assoc_add_peer(asoc, daddr, GFP_KERNEL, SCTP_UNKNOWN); | |
1154 | if (!t) | |
1155 | return -ENOMEM; | |
1156 | ||
1157 | return 0; | |
1158 | } | |
1159 | ||
3f7a87d2 FF |
1160 | /* __sctp_connect(struct sock* sk, struct sockaddr *kaddrs, int addrs_size) |
1161 | * | |
1162 | * Common routine for handling connect() and sctp_connectx(). | |
1163 | * Connect will come in with just a single address. | |
1164 | */ | |
dd8378b3 XL |
1165 | static int __sctp_connect(struct sock *sk, struct sockaddr *kaddrs, |
1166 | int addrs_size, int flags, sctp_assoc_t *assoc_id) | |
3f7a87d2 | 1167 | { |
dd8378b3 XL |
1168 | struct sctp_sock *sp = sctp_sk(sk); |
1169 | struct sctp_endpoint *ep = sp->ep; | |
3f7a87d2 | 1170 | struct sctp_transport *transport; |
a64e59c7 | 1171 | struct sctp_association *asoc; |
dd8378b3 XL |
1172 | void *addr_buf = kaddrs; |
1173 | union sctp_addr *daddr; | |
dd8378b3 XL |
1174 | struct sctp_af *af; |
1175 | int walk_size, err; | |
3f7a87d2 | 1176 | long timeo; |
3f7a87d2 | 1177 | |
e5b13f34 | 1178 | if (sctp_sstate(sk, ESTABLISHED) || sctp_sstate(sk, CLOSING) || |
dd8378b3 XL |
1179 | (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))) |
1180 | return -EISCONN; | |
1181 | ||
1182 | daddr = addr_buf; | |
1183 | af = sctp_get_af_specific(daddr->sa.sa_family); | |
1184 | if (!af || af->sockaddr_len > addrs_size) | |
1185 | return -EINVAL; | |
1186 | ||
1187 | err = sctp_verify_addr(sk, daddr, af->sockaddr_len); | |
1188 | if (err) | |
1189 | return err; | |
1190 | ||
1191 | asoc = sctp_endpoint_lookup_assoc(ep, daddr, &transport); | |
1192 | if (asoc) | |
1193 | return asoc->state >= SCTP_STATE_ESTABLISHED ? -EISCONN | |
1194 | : -EALREADY; | |
1195 | ||
f26f9951 XL |
1196 | err = sctp_connect_new_asoc(ep, daddr, NULL, &transport); |
1197 | if (err) | |
1198 | return err; | |
1199 | asoc = transport->asoc; | |
3f7a87d2 | 1200 | |
dd8378b3 XL |
1201 | addr_buf += af->sockaddr_len; |
1202 | walk_size = af->sockaddr_len; | |
1203 | while (walk_size < addrs_size) { | |
1204 | err = -EINVAL; | |
1205 | if (walk_size + sizeof(sa_family_t) > addrs_size) | |
3f7a87d2 | 1206 | goto out_free; |
d7e0d19a | 1207 | |
dd8378b3 XL |
1208 | daddr = addr_buf; |
1209 | af = sctp_get_af_specific(daddr->sa.sa_family); | |
1210 | if (!af || af->sockaddr_len + walk_size > addrs_size) | |
1211 | goto out_free; | |
e4d1feab | 1212 | |
dd8378b3 | 1213 | if (asoc->peer.port != ntohs(daddr->v4.sin_port)) |
3f7a87d2 FF |
1214 | goto out_free; |
1215 | ||
a64e59c7 | 1216 | err = sctp_connect_add_peer(asoc, daddr, af->sockaddr_len); |
dd8378b3 | 1217 | if (err) |
16d00fb7 | 1218 | goto out_free; |
3f7a87d2 | 1219 | |
dd8378b3 | 1220 | addr_buf += af->sockaddr_len; |
3f7a87d2 FF |
1221 | walk_size += af->sockaddr_len; |
1222 | } | |
1223 | ||
c6ba68a2 VY |
1224 | /* In case the user of sctp_connectx() wants an association |
1225 | * id back, assign one now. | |
1226 | */ | |
1227 | if (assoc_id) { | |
1228 | err = sctp_assoc_set_id(asoc, GFP_KERNEL); | |
1229 | if (err < 0) | |
1230 | goto out_free; | |
1231 | } | |
1232 | ||
f26f9951 | 1233 | err = sctp_primitive_ASSOCIATE(sock_net(sk), asoc, NULL); |
dd8378b3 | 1234 | if (err < 0) |
3f7a87d2 | 1235 | goto out_free; |
3f7a87d2 FF |
1236 | |
1237 | /* Initialize sk's dport and daddr for getpeername() */ | |
c720c7e8 | 1238 | inet_sk(sk)->inet_dport = htons(asoc->peer.port); |
dd8378b3 | 1239 | sp->pf->to_sk_daddr(daddr, sk); |
8de8c873 | 1240 | sk->sk_err = 0; |
3f7a87d2 | 1241 | |
7233bc84 | 1242 | if (assoc_id) |
88a0a948 | 1243 | *assoc_id = asoc->assoc_id; |
2277c7cd | 1244 | |
dd8378b3 XL |
1245 | timeo = sock_sndtimeo(sk, flags & O_NONBLOCK); |
1246 | return sctp_wait_for_connect(asoc, &timeo); | |
3f7a87d2 FF |
1247 | |
1248 | out_free: | |
bb33381d DB |
1249 | pr_debug("%s: took out_free path with asoc:%p kaddrs:%p err:%d\n", |
1250 | __func__, asoc, kaddrs, err); | |
dd8378b3 | 1251 | sctp_association_free(asoc); |
3f7a87d2 FF |
1252 | return err; |
1253 | } | |
1254 | ||
1255 | /* Helper for tunneling sctp_connectx() requests through sctp_setsockopt() | |
1256 | * | |
1257 | * API 8.9 | |
88a0a948 VY |
1258 | * int sctp_connectx(int sd, struct sockaddr *addrs, int addrcnt, |
1259 | * sctp_assoc_t *asoc); | |
3f7a87d2 FF |
1260 | * |
1261 | * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses. | |
1262 | * If the sd is an IPv6 socket, the addresses passed can either be IPv4 | |
1263 | * or IPv6 addresses. | |
1264 | * | |
1265 | * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see | |
1266 | * Section 3.1.2 for this usage. | |
1267 | * | |
1268 | * addrs is a pointer to an array of one or more socket addresses. Each | |
1269 | * address is contained in its appropriate structure (i.e. struct | |
1270 | * sockaddr_in or struct sockaddr_in6) the family of the address type | |
1271 | * must be used to distengish the address length (note that this | |
1272 | * representation is termed a "packed array" of addresses). The caller | |
1273 | * specifies the number of addresses in the array with addrcnt. | |
1274 | * | |
88a0a948 VY |
1275 | * On success, sctp_connectx() returns 0. It also sets the assoc_id to |
1276 | * the association id of the new association. On failure, sctp_connectx() | |
1277 | * returns -1, and sets errno to the appropriate error code. The assoc_id | |
1278 | * is not touched by the kernel. | |
3f7a87d2 FF |
1279 | * |
1280 | * For SCTP, the port given in each socket address must be the same, or | |
1281 | * sctp_connectx() will fail, setting errno to EINVAL. | |
1282 | * | |
1283 | * An application can use sctp_connectx to initiate an association with | |
1284 | * an endpoint that is multi-homed. Much like sctp_bindx() this call | |
1285 | * allows a caller to specify multiple addresses at which a peer can be | |
1286 | * reached. The way the SCTP stack uses the list of addresses to set up | |
25985edc | 1287 | * the association is implementation dependent. This function only |
3f7a87d2 FF |
1288 | * specifies that the stack will try to make use of all the addresses in |
1289 | * the list when needed. | |
1290 | * | |
1291 | * Note that the list of addresses passed in is only used for setting up | |
1292 | * the association. It does not necessarily equal the set of addresses | |
1293 | * the peer uses for the resulting association. If the caller wants to | |
1294 | * find out the set of peer addresses, it must use sctp_getpaddrs() to | |
1295 | * retrieve them after the association has been set up. | |
1296 | * | |
1297 | * Basically do nothing but copying the addresses from user to kernel | |
1298 | * land and invoking either sctp_connectx(). This is used for tunneling | |
1299 | * the sctp_connectx() request through sctp_setsockopt() from userspace. | |
1300 | * | |
3f7a87d2 FF |
1301 | * On exit there is no need to do sockfd_put(), sys_setsockopt() does |
1302 | * it. | |
1303 | * | |
1304 | * sk The sk of the socket | |
ce5b2f89 | 1305 | * addrs The pointer to the addresses |
3f7a87d2 FF |
1306 | * addrssize Size of the addrs buffer |
1307 | * | |
88a0a948 | 1308 | * Returns >=0 if ok, <0 errno code on error. |
3f7a87d2 | 1309 | */ |
ce5b2f89 CH |
1310 | static int __sctp_setsockopt_connectx(struct sock *sk, struct sockaddr *kaddrs, |
1311 | int addrs_size, sctp_assoc_t *assoc_id) | |
3f7a87d2 | 1312 | { |
644fbdea | 1313 | int err = 0, flags = 0; |
3f7a87d2 | 1314 | |
bb33381d | 1315 | pr_debug("%s: sk:%p addrs:%p addrs_size:%d\n", |
ce5b2f89 | 1316 | __func__, sk, kaddrs, addrs_size); |
3f7a87d2 | 1317 | |
f40f1177 XL |
1318 | /* make sure the 1st addr's sa_family is accessible later */ |
1319 | if (unlikely(addrs_size < sizeof(sa_family_t))) | |
3f7a87d2 FF |
1320 | return -EINVAL; |
1321 | ||
2277c7cd RH |
1322 | /* Allow security module to validate connectx addresses. */ |
1323 | err = security_sctp_bind_connect(sk, SCTP_SOCKOPT_CONNECTX, | |
1324 | (struct sockaddr *)kaddrs, | |
1325 | addrs_size); | |
1326 | if (err) | |
ce5b2f89 | 1327 | return err; |
2277c7cd | 1328 | |
644fbdea XL |
1329 | /* in-kernel sockets don't generally have a file allocated to them |
1330 | * if all they do is call sock_create_kern(). | |
1331 | */ | |
1332 | if (sk->sk_socket->file) | |
1333 | flags = sk->sk_socket->file->f_flags; | |
1334 | ||
ce5b2f89 | 1335 | return __sctp_connect(sk, kaddrs, addrs_size, flags, assoc_id); |
3f7a87d2 FF |
1336 | } |
1337 | ||
88a0a948 VY |
1338 | /* |
1339 | * This is an older interface. It's kept for backward compatibility | |
1340 | * to the option that doesn't provide association id. | |
1341 | */ | |
26ac8e5f | 1342 | static int sctp_setsockopt_connectx_old(struct sock *sk, |
ce5b2f89 | 1343 | struct sockaddr *kaddrs, |
dda91928 | 1344 | int addrs_size) |
88a0a948 | 1345 | { |
ce5b2f89 | 1346 | return __sctp_setsockopt_connectx(sk, kaddrs, addrs_size, NULL); |
88a0a948 VY |
1347 | } |
1348 | ||
1349 | /* | |
1350 | * New interface for the API. The since the API is done with a socket | |
1351 | * option, to make it simple we feed back the association id is as a return | |
1352 | * indication to the call. Error is always negative and association id is | |
1353 | * always positive. | |
1354 | */ | |
26ac8e5f | 1355 | static int sctp_setsockopt_connectx(struct sock *sk, |
ce5b2f89 | 1356 | struct sockaddr *kaddrs, |
dda91928 | 1357 | int addrs_size) |
88a0a948 VY |
1358 | { |
1359 | sctp_assoc_t assoc_id = 0; | |
1360 | int err = 0; | |
1361 | ||
ce5b2f89 | 1362 | err = __sctp_setsockopt_connectx(sk, kaddrs, addrs_size, &assoc_id); |
88a0a948 VY |
1363 | |
1364 | if (err) | |
1365 | return err; | |
1366 | else | |
1367 | return assoc_id; | |
1368 | } | |
1369 | ||
c6ba68a2 | 1370 | /* |
f9c67811 VY |
1371 | * New (hopefully final) interface for the API. |
1372 | * We use the sctp_getaddrs_old structure so that use-space library | |
ffd59393 | 1373 | * can avoid any unnecessary allocations. The only different part |
f9c67811 | 1374 | * is that we store the actual length of the address buffer into the |
ffd59393 | 1375 | * addrs_num structure member. That way we can re-use the existing |
f9c67811 | 1376 | * code. |
c6ba68a2 | 1377 | */ |
ffd59393 DB |
1378 | #ifdef CONFIG_COMPAT |
1379 | struct compat_sctp_getaddrs_old { | |
1380 | sctp_assoc_t assoc_id; | |
1381 | s32 addr_num; | |
1382 | compat_uptr_t addrs; /* struct sockaddr * */ | |
1383 | }; | |
1384 | #endif | |
1385 | ||
26ac8e5f | 1386 | static int sctp_getsockopt_connectx3(struct sock *sk, int len, |
dda91928 DB |
1387 | char __user *optval, |
1388 | int __user *optlen) | |
c6ba68a2 | 1389 | { |
f9c67811 | 1390 | struct sctp_getaddrs_old param; |
c6ba68a2 | 1391 | sctp_assoc_t assoc_id = 0; |
ce5b2f89 | 1392 | struct sockaddr *kaddrs; |
c6ba68a2 VY |
1393 | int err = 0; |
1394 | ||
ffd59393 | 1395 | #ifdef CONFIG_COMPAT |
96c0e0a9 | 1396 | if (in_compat_syscall()) { |
ffd59393 | 1397 | struct compat_sctp_getaddrs_old param32; |
c6ba68a2 | 1398 | |
ffd59393 DB |
1399 | if (len < sizeof(param32)) |
1400 | return -EINVAL; | |
1401 | if (copy_from_user(¶m32, optval, sizeof(param32))) | |
1402 | return -EFAULT; | |
f9c67811 | 1403 | |
ffd59393 DB |
1404 | param.assoc_id = param32.assoc_id; |
1405 | param.addr_num = param32.addr_num; | |
1406 | param.addrs = compat_ptr(param32.addrs); | |
1407 | } else | |
1408 | #endif | |
1409 | { | |
1410 | if (len < sizeof(param)) | |
1411 | return -EINVAL; | |
1412 | if (copy_from_user(¶m, optval, sizeof(param))) | |
1413 | return -EFAULT; | |
1414 | } | |
c6ba68a2 | 1415 | |
ce5b2f89 CH |
1416 | kaddrs = memdup_user(param.addrs, param.addr_num); |
1417 | if (IS_ERR(kaddrs)) | |
1418 | return PTR_ERR(kaddrs); | |
1419 | ||
1420 | err = __sctp_setsockopt_connectx(sk, kaddrs, param.addr_num, &assoc_id); | |
1421 | kfree(kaddrs); | |
c6ba68a2 VY |
1422 | if (err == 0 || err == -EINPROGRESS) { |
1423 | if (copy_to_user(optval, &assoc_id, sizeof(assoc_id))) | |
1424 | return -EFAULT; | |
1425 | if (put_user(sizeof(assoc_id), optlen)) | |
1426 | return -EFAULT; | |
1427 | } | |
1428 | ||
1429 | return err; | |
1430 | } | |
1431 | ||
1da177e4 LT |
1432 | /* API 3.1.4 close() - UDP Style Syntax |
1433 | * Applications use close() to perform graceful shutdown (as described in | |
1434 | * Section 10.1 of [SCTP]) on ALL the associations currently represented | |
1435 | * by a UDP-style socket. | |
1436 | * | |
1437 | * The syntax is | |
1438 | * | |
1439 | * ret = close(int sd); | |
1440 | * | |
1441 | * sd - the socket descriptor of the associations to be closed. | |
1442 | * | |
1443 | * To gracefully shutdown a specific association represented by the | |
1444 | * UDP-style socket, an application should use the sendmsg() call, | |
1445 | * passing no user data, but including the appropriate flag in the | |
1446 | * ancillary data (see Section xxxx). | |
1447 | * | |
1448 | * If sd in the close() call is a branched-off socket representing only | |
1449 | * one association, the shutdown is performed on that association only. | |
1450 | * | |
1451 | * 4.1.6 close() - TCP Style Syntax | |
1452 | * | |
1453 | * Applications use close() to gracefully close down an association. | |
1454 | * | |
1455 | * The syntax is: | |
1456 | * | |
1457 | * int close(int sd); | |
1458 | * | |
1459 | * sd - the socket descriptor of the association to be closed. | |
1460 | * | |
1461 | * After an application calls close() on a socket descriptor, no further | |
1462 | * socket operations will succeed on that descriptor. | |
1463 | * | |
1464 | * API 7.1.4 SO_LINGER | |
1465 | * | |
1466 | * An application using the TCP-style socket can use this option to | |
1467 | * perform the SCTP ABORT primitive. The linger option structure is: | |
1468 | * | |
1469 | * struct linger { | |
1470 | * int l_onoff; // option on/off | |
1471 | * int l_linger; // linger time | |
1472 | * }; | |
1473 | * | |
1474 | * To enable the option, set l_onoff to 1. If the l_linger value is set | |
1475 | * to 0, calling close() is the same as the ABORT primitive. If the | |
1476 | * value is set to a negative value, the setsockopt() call will return | |
1477 | * an error. If the value is set to a positive value linger_time, the | |
1478 | * close() can be blocked for at most linger_time ms. If the graceful | |
1479 | * shutdown phase does not finish during this period, close() will | |
1480 | * return but the graceful shutdown phase continues in the system. | |
1481 | */ | |
dda91928 | 1482 | static void sctp_close(struct sock *sk, long timeout) |
1da177e4 | 1483 | { |
55e26eb9 | 1484 | struct net *net = sock_net(sk); |
1da177e4 LT |
1485 | struct sctp_endpoint *ep; |
1486 | struct sctp_association *asoc; | |
1487 | struct list_head *pos, *temp; | |
cd4fcc70 | 1488 | unsigned int data_was_unread; |
1da177e4 | 1489 | |
bb33381d | 1490 | pr_debug("%s: sk:%p, timeout:%ld\n", __func__, sk, timeout); |
1da177e4 | 1491 | |
6dfe4b97 | 1492 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
1da177e4 | 1493 | sk->sk_shutdown = SHUTDOWN_MASK; |
cbabf463 | 1494 | inet_sk_set_state(sk, SCTP_SS_CLOSING); |
1da177e4 LT |
1495 | |
1496 | ep = sctp_sk(sk)->ep; | |
1497 | ||
cd4fcc70 TG |
1498 | /* Clean up any skbs sitting on the receive queue. */ |
1499 | data_was_unread = sctp_queue_purge_ulpevents(&sk->sk_receive_queue); | |
1500 | data_was_unread += sctp_queue_purge_ulpevents(&sctp_sk(sk)->pd_lobby); | |
1501 | ||
61c9fed4 | 1502 | /* Walk all associations on an endpoint. */ |
1da177e4 LT |
1503 | list_for_each_safe(pos, temp, &ep->asocs) { |
1504 | asoc = list_entry(pos, struct sctp_association, asocs); | |
1505 | ||
1506 | if (sctp_style(sk, TCP)) { | |
1507 | /* A closed association can still be in the list if | |
1508 | * it belongs to a TCP-style listening socket that is | |
1509 | * not yet accepted. If so, free it. If not, send an | |
1510 | * ABORT or SHUTDOWN based on the linger options. | |
1511 | */ | |
1512 | if (sctp_state(asoc, CLOSED)) { | |
1da177e4 | 1513 | sctp_association_free(asoc); |
b89498a1 VY |
1514 | continue; |
1515 | } | |
1516 | } | |
1da177e4 | 1517 | |
cd4fcc70 TG |
1518 | if (data_was_unread || !skb_queue_empty(&asoc->ulpq.lobby) || |
1519 | !skb_queue_empty(&asoc->ulpq.reasm) || | |
13228238 | 1520 | !skb_queue_empty(&asoc->ulpq.reasm_uo) || |
cd4fcc70 | 1521 | (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime)) { |
b9ac8672 SS |
1522 | struct sctp_chunk *chunk; |
1523 | ||
1524 | chunk = sctp_make_abort_user(asoc, NULL, 0); | |
068d8bd3 | 1525 | sctp_primitive_ABORT(net, asoc, chunk); |
b9ac8672 | 1526 | } else |
55e26eb9 | 1527 | sctp_primitive_SHUTDOWN(net, asoc, NULL); |
1da177e4 LT |
1528 | } |
1529 | ||
1da177e4 LT |
1530 | /* On a TCP-style socket, block for at most linger_time if set. */ |
1531 | if (sctp_style(sk, TCP) && timeout) | |
1532 | sctp_wait_for_close(sk, timeout); | |
1533 | ||
1534 | /* This will run the backlog queue. */ | |
048ed4b6 | 1535 | release_sock(sk); |
1da177e4 LT |
1536 | |
1537 | /* Supposedly, no process has access to the socket, but | |
1538 | * the net layers still may. | |
01bfe5e8 XL |
1539 | * Also, sctp_destroy_sock() needs to be called with addr_wq_lock |
1540 | * held and that should be grabbed before socket lock. | |
1da177e4 | 1541 | */ |
01bfe5e8 XL |
1542 | spin_lock_bh(&net->sctp.addr_wq_lock); |
1543 | bh_lock_sock_nested(sk); | |
1da177e4 LT |
1544 | |
1545 | /* Hold the sock, since sk_common_release() will put sock_put() | |
1546 | * and we have just a little more cleanup. | |
1547 | */ | |
1548 | sock_hold(sk); | |
1549 | sk_common_release(sk); | |
1550 | ||
5bc1d1b4 | 1551 | bh_unlock_sock(sk); |
01bfe5e8 | 1552 | spin_unlock_bh(&net->sctp.addr_wq_lock); |
1da177e4 LT |
1553 | |
1554 | sock_put(sk); | |
1555 | ||
1556 | SCTP_DBG_OBJCNT_DEC(sock); | |
1557 | } | |
1558 | ||
1559 | /* Handle EPIPE error. */ | |
1560 | static int sctp_error(struct sock *sk, int flags, int err) | |
1561 | { | |
1562 | if (err == -EPIPE) | |
1563 | err = sock_error(sk) ? : -EPIPE; | |
1564 | if (err == -EPIPE && !(flags & MSG_NOSIGNAL)) | |
1565 | send_sig(SIGPIPE, current, 0); | |
1566 | return err; | |
1567 | } | |
1568 | ||
1569 | /* API 3.1.3 sendmsg() - UDP Style Syntax | |
1570 | * | |
1571 | * An application uses sendmsg() and recvmsg() calls to transmit data to | |
1572 | * and receive data from its peer. | |
1573 | * | |
1574 | * ssize_t sendmsg(int socket, const struct msghdr *message, | |
1575 | * int flags); | |
1576 | * | |
1577 | * socket - the socket descriptor of the endpoint. | |
1578 | * message - pointer to the msghdr structure which contains a single | |
1579 | * user message and possibly some ancillary data. | |
1580 | * | |
1581 | * See Section 5 for complete description of the data | |
1582 | * structures. | |
1583 | * | |
1584 | * flags - flags sent or received with the user message, see Section | |
1585 | * 5 for complete description of the flags. | |
1586 | * | |
1587 | * Note: This function could use a rewrite especially when explicit | |
1588 | * connect support comes in. | |
1589 | */ | |
1590 | /* BUG: We do not implement the equivalent of sk_stream_wait_memory(). */ | |
1591 | ||
a05437ac XL |
1592 | static int sctp_msghdr_parse(const struct msghdr *msg, |
1593 | struct sctp_cmsgs *cmsgs); | |
1da177e4 | 1594 | |
204f817f XL |
1595 | static int sctp_sendmsg_parse(struct sock *sk, struct sctp_cmsgs *cmsgs, |
1596 | struct sctp_sndrcvinfo *srinfo, | |
1597 | const struct msghdr *msg, size_t msg_len) | |
1598 | { | |
1599 | __u16 sflags; | |
1600 | int err; | |
1601 | ||
1602 | if (sctp_sstate(sk, LISTENING) && sctp_style(sk, TCP)) | |
1603 | return -EPIPE; | |
1604 | ||
1605 | if (msg_len > sk->sk_sndbuf) | |
1606 | return -EMSGSIZE; | |
1607 | ||
1608 | memset(cmsgs, 0, sizeof(*cmsgs)); | |
1609 | err = sctp_msghdr_parse(msg, cmsgs); | |
1610 | if (err) { | |
1611 | pr_debug("%s: msghdr parse err:%x\n", __func__, err); | |
1612 | return err; | |
1613 | } | |
1614 | ||
1615 | memset(srinfo, 0, sizeof(*srinfo)); | |
1616 | if (cmsgs->srinfo) { | |
1617 | srinfo->sinfo_stream = cmsgs->srinfo->sinfo_stream; | |
1618 | srinfo->sinfo_flags = cmsgs->srinfo->sinfo_flags; | |
1619 | srinfo->sinfo_ppid = cmsgs->srinfo->sinfo_ppid; | |
1620 | srinfo->sinfo_context = cmsgs->srinfo->sinfo_context; | |
1621 | srinfo->sinfo_assoc_id = cmsgs->srinfo->sinfo_assoc_id; | |
1622 | srinfo->sinfo_timetolive = cmsgs->srinfo->sinfo_timetolive; | |
1623 | } | |
1624 | ||
1625 | if (cmsgs->sinfo) { | |
1626 | srinfo->sinfo_stream = cmsgs->sinfo->snd_sid; | |
1627 | srinfo->sinfo_flags = cmsgs->sinfo->snd_flags; | |
1628 | srinfo->sinfo_ppid = cmsgs->sinfo->snd_ppid; | |
1629 | srinfo->sinfo_context = cmsgs->sinfo->snd_context; | |
1630 | srinfo->sinfo_assoc_id = cmsgs->sinfo->snd_assoc_id; | |
1631 | } | |
1632 | ||
ed63afb8 XL |
1633 | if (cmsgs->prinfo) { |
1634 | srinfo->sinfo_timetolive = cmsgs->prinfo->pr_value; | |
1635 | SCTP_PR_SET_POLICY(srinfo->sinfo_flags, | |
1636 | cmsgs->prinfo->pr_policy); | |
1637 | } | |
1638 | ||
204f817f XL |
1639 | sflags = srinfo->sinfo_flags; |
1640 | if (!sflags && msg_len) | |
1641 | return 0; | |
1642 | ||
1643 | if (sctp_style(sk, TCP) && (sflags & (SCTP_EOF | SCTP_ABORT))) | |
1644 | return -EINVAL; | |
1645 | ||
1646 | if (((sflags & SCTP_EOF) && msg_len > 0) || | |
1647 | (!(sflags & (SCTP_EOF | SCTP_ABORT)) && msg_len == 0)) | |
1648 | return -EINVAL; | |
1649 | ||
1650 | if ((sflags & SCTP_ADDR_OVER) && !msg->msg_name) | |
1651 | return -EINVAL; | |
1652 | ||
1653 | return 0; | |
1654 | } | |
1655 | ||
2bfd80f9 XL |
1656 | static int sctp_sendmsg_new_asoc(struct sock *sk, __u16 sflags, |
1657 | struct sctp_cmsgs *cmsgs, | |
1658 | union sctp_addr *daddr, | |
1659 | struct sctp_transport **tp) | |
1660 | { | |
1661 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; | |
2bfd80f9 | 1662 | struct sctp_association *asoc; |
2c0dbaa0 | 1663 | struct cmsghdr *cmsg; |
4be4139f | 1664 | __be32 flowinfo = 0; |
9eda2d2d | 1665 | struct sctp_af *af; |
d98985dd | 1666 | int err; |
2bfd80f9 XL |
1667 | |
1668 | *tp = NULL; | |
1669 | ||
1670 | if (sflags & (SCTP_EOF | SCTP_ABORT)) | |
1671 | return -EINVAL; | |
1672 | ||
1673 | if (sctp_style(sk, TCP) && (sctp_sstate(sk, ESTABLISHED) || | |
1674 | sctp_sstate(sk, CLOSING))) | |
1675 | return -EADDRNOTAVAIL; | |
1676 | ||
9eda2d2d LT |
1677 | /* Label connection socket for first association 1-to-many |
1678 | * style for client sequence socket()->sendmsg(). This | |
1679 | * needs to be done before sctp_assoc_add_peer() as that will | |
1680 | * set up the initial packet that needs to account for any | |
1681 | * security ip options (CIPSO/CALIPSO) added to the packet. | |
1682 | */ | |
1683 | af = sctp_get_af_specific(daddr->sa.sa_family); | |
1684 | if (!af) | |
1685 | return -EINVAL; | |
1686 | err = security_sctp_bind_connect(sk, SCTP_SENDMSG_CONNECT, | |
1687 | (struct sockaddr *)daddr, | |
1688 | af->sockaddr_len); | |
1689 | if (err < 0) | |
1690 | return err; | |
1da177e4 | 1691 | |
f26f9951 XL |
1692 | err = sctp_connect_new_asoc(ep, daddr, cmsgs->init, tp); |
1693 | if (err) | |
1694 | return err; | |
1695 | asoc = (*tp)->asoc; | |
2bfd80f9 | 1696 | |
2c0dbaa0 XL |
1697 | if (!cmsgs->addrs_msg) |
1698 | return 0; | |
1699 | ||
4be4139f XL |
1700 | if (daddr->sa.sa_family == AF_INET6) |
1701 | flowinfo = daddr->v6.sin6_flowinfo; | |
1702 | ||
2c0dbaa0 XL |
1703 | /* sendv addr list parse */ |
1704 | for_each_cmsghdr(cmsg, cmsgs->addrs_msg) { | |
2c0dbaa0 XL |
1705 | union sctp_addr _daddr; |
1706 | int dlen; | |
1707 | ||
1708 | if (cmsg->cmsg_level != IPPROTO_SCTP || | |
1709 | (cmsg->cmsg_type != SCTP_DSTADDRV4 && | |
1710 | cmsg->cmsg_type != SCTP_DSTADDRV6)) | |
1711 | continue; | |
1712 | ||
1713 | daddr = &_daddr; | |
1714 | memset(daddr, 0, sizeof(*daddr)); | |
1715 | dlen = cmsg->cmsg_len - sizeof(struct cmsghdr); | |
1716 | if (cmsg->cmsg_type == SCTP_DSTADDRV4) { | |
d98985dd WY |
1717 | if (dlen < sizeof(struct in_addr)) { |
1718 | err = -EINVAL; | |
2c0dbaa0 | 1719 | goto free; |
d98985dd | 1720 | } |
2c0dbaa0 XL |
1721 | |
1722 | dlen = sizeof(struct in_addr); | |
1723 | daddr->v4.sin_family = AF_INET; | |
1724 | daddr->v4.sin_port = htons(asoc->peer.port); | |
1725 | memcpy(&daddr->v4.sin_addr, CMSG_DATA(cmsg), dlen); | |
1726 | } else { | |
d98985dd WY |
1727 | if (dlen < sizeof(struct in6_addr)) { |
1728 | err = -EINVAL; | |
2c0dbaa0 | 1729 | goto free; |
d98985dd | 1730 | } |
2c0dbaa0 XL |
1731 | |
1732 | dlen = sizeof(struct in6_addr); | |
4be4139f | 1733 | daddr->v6.sin6_flowinfo = flowinfo; |
2c0dbaa0 XL |
1734 | daddr->v6.sin6_family = AF_INET6; |
1735 | daddr->v6.sin6_port = htons(asoc->peer.port); | |
1736 | memcpy(&daddr->v6.sin6_addr, CMSG_DATA(cmsg), dlen); | |
1737 | } | |
2c0dbaa0 | 1738 | |
a64e59c7 XL |
1739 | err = sctp_connect_add_peer(asoc, daddr, sizeof(*daddr)); |
1740 | if (err) | |
2c0dbaa0 | 1741 | goto free; |
2c0dbaa0 XL |
1742 | } |
1743 | ||
2bfd80f9 XL |
1744 | return 0; |
1745 | ||
1746 | free: | |
1747 | sctp_association_free(asoc); | |
1748 | return err; | |
1749 | } | |
1750 | ||
c2666de1 XL |
1751 | static int sctp_sendmsg_check_sflags(struct sctp_association *asoc, |
1752 | __u16 sflags, struct msghdr *msg, | |
1753 | size_t msg_len) | |
1754 | { | |
1755 | struct sock *sk = asoc->base.sk; | |
1756 | struct net *net = sock_net(sk); | |
1757 | ||
1758 | if (sctp_state(asoc, CLOSED) && sctp_style(sk, TCP)) | |
1759 | return -EPIPE; | |
1760 | ||
49102805 XL |
1761 | if ((sflags & SCTP_SENDALL) && sctp_style(sk, UDP) && |
1762 | !sctp_state(asoc, ESTABLISHED)) | |
1763 | return 0; | |
1764 | ||
c2666de1 XL |
1765 | if (sflags & SCTP_EOF) { |
1766 | pr_debug("%s: shutting down association:%p\n", __func__, asoc); | |
1767 | sctp_primitive_SHUTDOWN(net, asoc, NULL); | |
1768 | ||
1769 | return 0; | |
1770 | } | |
1771 | ||
1772 | if (sflags & SCTP_ABORT) { | |
1773 | struct sctp_chunk *chunk; | |
1774 | ||
1775 | chunk = sctp_make_abort_user(asoc, msg, msg_len); | |
1776 | if (!chunk) | |
1777 | return -ENOMEM; | |
1778 | ||
1779 | pr_debug("%s: aborting association:%p\n", __func__, asoc); | |
1780 | sctp_primitive_ABORT(net, asoc, chunk); | |
901efe12 | 1781 | iov_iter_revert(&msg->msg_iter, msg_len); |
c2666de1 XL |
1782 | |
1783 | return 0; | |
1784 | } | |
1785 | ||
1786 | return 1; | |
1787 | } | |
1788 | ||
f84af331 XL |
1789 | static int sctp_sendmsg_to_asoc(struct sctp_association *asoc, |
1790 | struct msghdr *msg, size_t msg_len, | |
1791 | struct sctp_transport *transport, | |
1792 | struct sctp_sndrcvinfo *sinfo) | |
1793 | { | |
1794 | struct sock *sk = asoc->base.sk; | |
63d01330 | 1795 | struct sctp_sock *sp = sctp_sk(sk); |
f84af331 XL |
1796 | struct net *net = sock_net(sk); |
1797 | struct sctp_datamsg *datamsg; | |
1798 | bool wait_connect = false; | |
1799 | struct sctp_chunk *chunk; | |
1800 | long timeo; | |
1801 | int err; | |
1802 | ||
1803 | if (sinfo->sinfo_stream >= asoc->stream.outcnt) { | |
1804 | err = -EINVAL; | |
1805 | goto err; | |
1806 | } | |
1807 | ||
05364ca0 | 1808 | if (unlikely(!SCTP_SO(&asoc->stream, sinfo->sinfo_stream)->ext)) { |
f84af331 XL |
1809 | err = sctp_stream_init_ext(&asoc->stream, sinfo->sinfo_stream); |
1810 | if (err) | |
1811 | goto err; | |
1812 | } | |
1813 | ||
63d01330 | 1814 | if (sp->disable_fragments && msg_len > asoc->frag_point) { |
f84af331 XL |
1815 | err = -EMSGSIZE; |
1816 | goto err; | |
1817 | } | |
1818 | ||
2521680e | 1819 | if (asoc->pmtu_pending) { |
63d01330 MRL |
1820 | if (sp->param_flags & SPP_PMTUD_ENABLE) |
1821 | sctp_assoc_sync_pmtu(asoc); | |
2521680e MRL |
1822 | asoc->pmtu_pending = 0; |
1823 | } | |
0aee4c25 | 1824 | |
cd305c74 | 1825 | if (sctp_wspace(asoc) < (int)msg_len) |
0aee4c25 NH |
1826 | sctp_prsctp_prune(asoc, sinfo, msg_len - sctp_wspace(asoc)); |
1827 | ||
1033990a | 1828 | if (sctp_wspace(asoc) <= 0 || !sk_wmem_schedule(sk, msg_len)) { |
0aee4c25 NH |
1829 | timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT); |
1830 | err = sctp_wait_for_sndbuf(asoc, &timeo, msg_len); | |
1831 | if (err) | |
1832 | goto err; | |
2584024b XL |
1833 | if (unlikely(sinfo->sinfo_stream >= asoc->stream.outcnt)) { |
1834 | err = -EINVAL; | |
1835 | goto err; | |
1836 | } | |
0aee4c25 NH |
1837 | } |
1838 | ||
f84af331 XL |
1839 | if (sctp_state(asoc, CLOSED)) { |
1840 | err = sctp_primitive_ASSOCIATE(net, asoc, NULL); | |
1841 | if (err) | |
1842 | goto err; | |
1843 | ||
e55f4b8b | 1844 | if (asoc->ep->intl_enable) { |
f84af331 XL |
1845 | timeo = sock_sndtimeo(sk, 0); |
1846 | err = sctp_wait_for_connect(asoc, &timeo); | |
c863850c XL |
1847 | if (err) { |
1848 | err = -ESRCH; | |
f84af331 | 1849 | goto err; |
c863850c | 1850 | } |
f84af331 XL |
1851 | } else { |
1852 | wait_connect = true; | |
1853 | } | |
1854 | ||
1855 | pr_debug("%s: we associated primitively\n", __func__); | |
1856 | } | |
1857 | ||
f84af331 XL |
1858 | datamsg = sctp_datamsg_from_user(asoc, sinfo, &msg->msg_iter); |
1859 | if (IS_ERR(datamsg)) { | |
1860 | err = PTR_ERR(datamsg); | |
1861 | goto err; | |
1862 | } | |
1863 | ||
1864 | asoc->force_delay = !!(msg->msg_flags & MSG_MORE); | |
1865 | ||
1866 | list_for_each_entry(chunk, &datamsg->chunks, frag_list) { | |
1867 | sctp_chunk_hold(chunk); | |
1868 | sctp_set_owner_w(chunk); | |
1869 | chunk->transport = transport; | |
1870 | } | |
1871 | ||
1872 | err = sctp_primitive_SEND(net, asoc, datamsg); | |
1873 | if (err) { | |
1874 | sctp_datamsg_free(datamsg); | |
1875 | goto err; | |
1876 | } | |
1877 | ||
1878 | pr_debug("%s: we sent primitively\n", __func__); | |
1879 | ||
1880 | sctp_datamsg_put(datamsg); | |
1881 | ||
1882 | if (unlikely(wait_connect)) { | |
1883 | timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT); | |
1884 | sctp_wait_for_connect(asoc, &timeo); | |
1885 | } | |
1886 | ||
1887 | err = msg_len; | |
1888 | ||
1889 | err: | |
1890 | return err; | |
1891 | } | |
1892 | ||
becef9b1 XL |
1893 | static union sctp_addr *sctp_sendmsg_get_daddr(struct sock *sk, |
1894 | const struct msghdr *msg, | |
1895 | struct sctp_cmsgs *cmsgs) | |
1896 | { | |
1897 | union sctp_addr *daddr = NULL; | |
1898 | int err; | |
1899 | ||
1900 | if (!sctp_style(sk, UDP_HIGH_BANDWIDTH) && msg->msg_name) { | |
1901 | int len = msg->msg_namelen; | |
1902 | ||
1903 | if (len > sizeof(*daddr)) | |
1904 | len = sizeof(*daddr); | |
1905 | ||
1906 | daddr = (union sctp_addr *)msg->msg_name; | |
1907 | ||
1908 | err = sctp_verify_addr(sk, daddr, len); | |
1909 | if (err) | |
1910 | return ERR_PTR(err); | |
1911 | } | |
1912 | ||
1913 | return daddr; | |
1914 | } | |
1915 | ||
d42cb06e XL |
1916 | static void sctp_sendmsg_update_sinfo(struct sctp_association *asoc, |
1917 | struct sctp_sndrcvinfo *sinfo, | |
1918 | struct sctp_cmsgs *cmsgs) | |
1919 | { | |
1920 | if (!cmsgs->srinfo && !cmsgs->sinfo) { | |
1921 | sinfo->sinfo_stream = asoc->default_stream; | |
1922 | sinfo->sinfo_ppid = asoc->default_ppid; | |
1923 | sinfo->sinfo_context = asoc->default_context; | |
1924 | sinfo->sinfo_assoc_id = sctp_assoc2id(asoc); | |
ed63afb8 XL |
1925 | |
1926 | if (!cmsgs->prinfo) | |
1927 | sinfo->sinfo_flags = asoc->default_flags; | |
d42cb06e XL |
1928 | } |
1929 | ||
ed63afb8 | 1930 | if (!cmsgs->srinfo && !cmsgs->prinfo) |
d42cb06e | 1931 | sinfo->sinfo_timetolive = asoc->default_timetolive; |
3ff547c0 XL |
1932 | |
1933 | if (cmsgs->authinfo) { | |
1934 | /* Reuse sinfo_tsn to indicate that authinfo was set and | |
1935 | * sinfo_ssn to save the keyid on tx path. | |
1936 | */ | |
1937 | sinfo->sinfo_tsn = 1; | |
1938 | sinfo->sinfo_ssn = cmsgs->authinfo->auth_keynumber; | |
1939 | } | |
d42cb06e XL |
1940 | } |
1941 | ||
1b784140 | 1942 | static int sctp_sendmsg(struct sock *sk, struct msghdr *msg, size_t msg_len) |
1da177e4 | 1943 | { |
204f817f | 1944 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
8e87c6eb | 1945 | struct sctp_transport *transport = NULL; |
204f817f | 1946 | struct sctp_sndrcvinfo _sinfo, *sinfo; |
ba59fb02 | 1947 | struct sctp_association *asoc, *tmp; |
007b7e18 | 1948 | struct sctp_cmsgs cmsgs; |
becef9b1 | 1949 | union sctp_addr *daddr; |
007b7e18 XL |
1950 | bool new = false; |
1951 | __u16 sflags; | |
63b94938 | 1952 | int err; |
1da177e4 | 1953 | |
204f817f XL |
1954 | /* Parse and get snd_info */ |
1955 | err = sctp_sendmsg_parse(sk, &cmsgs, &_sinfo, msg, msg_len); | |
1956 | if (err) | |
007b7e18 | 1957 | goto out; |
1da177e4 | 1958 | |
204f817f | 1959 | sinfo = &_sinfo; |
007b7e18 | 1960 | sflags = sinfo->sinfo_flags; |
1da177e4 | 1961 | |
becef9b1 XL |
1962 | /* Get daddr from msg */ |
1963 | daddr = sctp_sendmsg_get_daddr(sk, msg, &cmsgs); | |
1964 | if (IS_ERR(daddr)) { | |
1965 | err = PTR_ERR(daddr); | |
007b7e18 | 1966 | goto out; |
1da177e4 LT |
1967 | } |
1968 | ||
048ed4b6 | 1969 | lock_sock(sk); |
1da177e4 | 1970 | |
49102805 XL |
1971 | /* SCTP_SENDALL process */ |
1972 | if ((sflags & SCTP_SENDALL) && sctp_style(sk, UDP)) { | |
ba59fb02 | 1973 | list_for_each_entry_safe(asoc, tmp, &ep->asocs, asocs) { |
49102805 XL |
1974 | err = sctp_sendmsg_check_sflags(asoc, sflags, msg, |
1975 | msg_len); | |
1976 | if (err == 0) | |
1977 | continue; | |
1978 | if (err < 0) | |
1979 | goto out_unlock; | |
1980 | ||
1981 | sctp_sendmsg_update_sinfo(asoc, sinfo, &cmsgs); | |
1982 | ||
1983 | err = sctp_sendmsg_to_asoc(asoc, msg, msg_len, | |
1984 | NULL, sinfo); | |
1985 | if (err < 0) | |
1986 | goto out_unlock; | |
1987 | ||
1988 | iov_iter_revert(&msg->msg_iter, err); | |
1989 | } | |
1990 | ||
1991 | goto out_unlock; | |
1992 | } | |
1993 | ||
0a3920d2 | 1994 | /* Get and check or create asoc */ |
becef9b1 | 1995 | if (daddr) { |
becef9b1 | 1996 | asoc = sctp_endpoint_lookup_assoc(ep, daddr, &transport); |
0a3920d2 XL |
1997 | if (asoc) { |
1998 | err = sctp_sendmsg_check_sflags(asoc, sflags, msg, | |
1999 | msg_len); | |
2000 | if (err <= 0) | |
2001 | goto out_unlock; | |
2002 | } else { | |
2003 | err = sctp_sendmsg_new_asoc(sk, sflags, &cmsgs, daddr, | |
2004 | &transport); | |
2005 | if (err) | |
2006 | goto out_unlock; | |
2007 | ||
2008 | asoc = transport->asoc; | |
2009 | new = true; | |
2010 | } | |
2011 | ||
2012 | if (!sctp_style(sk, TCP) && !(sflags & SCTP_ADDR_OVER)) | |
2013 | transport = NULL; | |
1da177e4 | 2014 | } else { |
007b7e18 | 2015 | asoc = sctp_id2assoc(sk, sinfo->sinfo_assoc_id); |
1da177e4 LT |
2016 | if (!asoc) { |
2017 | err = -EPIPE; | |
2018 | goto out_unlock; | |
2019 | } | |
1da177e4 | 2020 | |
007b7e18 | 2021 | err = sctp_sendmsg_check_sflags(asoc, sflags, msg, msg_len); |
c2666de1 | 2022 | if (err <= 0) |
1da177e4 | 2023 | goto out_unlock; |
1da177e4 LT |
2024 | } |
2025 | ||
d42cb06e XL |
2026 | /* Update snd_info with the asoc */ |
2027 | sctp_sendmsg_update_sinfo(asoc, sinfo, &cmsgs); | |
1da177e4 | 2028 | |
f84af331 | 2029 | /* Send msg to the asoc */ |
8e87c6eb | 2030 | err = sctp_sendmsg_to_asoc(asoc, msg, msg_len, transport, sinfo); |
007b7e18 | 2031 | if (err < 0 && err != -ESRCH && new) |
1da177e4 | 2032 | sctp_association_free(asoc); |
8e87c6eb | 2033 | |
1da177e4 | 2034 | out_unlock: |
048ed4b6 | 2035 | release_sock(sk); |
007b7e18 | 2036 | out: |
f84af331 | 2037 | return sctp_error(sk, msg->msg_flags, err); |
1da177e4 LT |
2038 | } |
2039 | ||
2040 | /* This is an extended version of skb_pull() that removes the data from the | |
2041 | * start of a skb even when data is spread across the list of skb's in the | |
2042 | * frag_list. len specifies the total amount of data that needs to be removed. | |
2043 | * when 'len' bytes could be removed from the skb, it returns 0. | |
2044 | * If 'len' exceeds the total skb length, it returns the no. of bytes that | |
2045 | * could not be removed. | |
2046 | */ | |
2047 | static int sctp_skb_pull(struct sk_buff *skb, int len) | |
2048 | { | |
2049 | struct sk_buff *list; | |
2050 | int skb_len = skb_headlen(skb); | |
2051 | int rlen; | |
2052 | ||
2053 | if (len <= skb_len) { | |
2054 | __skb_pull(skb, len); | |
2055 | return 0; | |
2056 | } | |
2057 | len -= skb_len; | |
2058 | __skb_pull(skb, skb_len); | |
2059 | ||
1b003be3 | 2060 | skb_walk_frags(skb, list) { |
1da177e4 LT |
2061 | rlen = sctp_skb_pull(list, len); |
2062 | skb->len -= (len-rlen); | |
2063 | skb->data_len -= (len-rlen); | |
2064 | ||
2065 | if (!rlen) | |
2066 | return 0; | |
2067 | ||
2068 | len = rlen; | |
2069 | } | |
2070 | ||
2071 | return len; | |
2072 | } | |
2073 | ||
2074 | /* API 3.1.3 recvmsg() - UDP Style Syntax | |
2075 | * | |
2076 | * ssize_t recvmsg(int socket, struct msghdr *message, | |
2077 | * int flags); | |
2078 | * | |
2079 | * socket - the socket descriptor of the endpoint. | |
2080 | * message - pointer to the msghdr structure which contains a single | |
2081 | * user message and possibly some ancillary data. | |
2082 | * | |
2083 | * See Section 5 for complete description of the data | |
2084 | * structures. | |
2085 | * | |
2086 | * flags - flags sent or received with the user message, see Section | |
2087 | * 5 for complete description of the flags. | |
2088 | */ | |
1b784140 | 2089 | static int sctp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, |
ec095263 | 2090 | int flags, int *addr_len) |
1da177e4 LT |
2091 | { |
2092 | struct sctp_ulpevent *event = NULL; | |
2093 | struct sctp_sock *sp = sctp_sk(sk); | |
1f45f78f | 2094 | struct sk_buff *skb, *head_skb; |
1da177e4 LT |
2095 | int copied; |
2096 | int err = 0; | |
2097 | int skb_len; | |
2098 | ||
ec095263 OH |
2099 | pr_debug("%s: sk:%p, msghdr:%p, len:%zd, flags:0x%x, addr_len:%p)\n", |
2100 | __func__, sk, msg, len, flags, addr_len); | |
1da177e4 | 2101 | |
048ed4b6 | 2102 | lock_sock(sk); |
1da177e4 | 2103 | |
e5b13f34 | 2104 | if (sctp_style(sk, TCP) && !sctp_sstate(sk, ESTABLISHED) && |
e0878694 | 2105 | !sctp_sstate(sk, CLOSING) && !sctp_sstate(sk, CLOSED)) { |
1da177e4 LT |
2106 | err = -ENOTCONN; |
2107 | goto out; | |
2108 | } | |
2109 | ||
ec095263 | 2110 | skb = sctp_skb_recv_datagram(sk, flags, &err); |
1da177e4 LT |
2111 | if (!skb) |
2112 | goto out; | |
2113 | ||
2114 | /* Get the total length of the skb including any skb's in the | |
2115 | * frag_list. | |
2116 | */ | |
2117 | skb_len = skb->len; | |
2118 | ||
2119 | copied = skb_len; | |
2120 | if (copied > len) | |
2121 | copied = len; | |
2122 | ||
51f3d02b | 2123 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
1da177e4 LT |
2124 | |
2125 | event = sctp_skb2event(skb); | |
2126 | ||
2127 | if (err) | |
2128 | goto out_free; | |
2129 | ||
1f45f78f MRL |
2130 | if (event->chunk && event->chunk->head_skb) |
2131 | head_skb = event->chunk->head_skb; | |
2132 | else | |
2133 | head_skb = skb; | |
6fd1d51c | 2134 | sock_recv_cmsgs(msg, sk, head_skb); |
1da177e4 LT |
2135 | if (sctp_ulpevent_is_notification(event)) { |
2136 | msg->msg_flags |= MSG_NOTIFICATION; | |
2137 | sp->pf->event_msgname(event, msg->msg_name, addr_len); | |
2138 | } else { | |
1f45f78f | 2139 | sp->pf->skb_msgname(head_skb, msg->msg_name, addr_len); |
1da177e4 LT |
2140 | } |
2141 | ||
2347c80f GOV |
2142 | /* Check if we allow SCTP_NXTINFO. */ |
2143 | if (sp->recvnxtinfo) | |
2144 | sctp_ulpevent_read_nxtinfo(event, msg, sk); | |
0d3a421d GOV |
2145 | /* Check if we allow SCTP_RCVINFO. */ |
2146 | if (sp->recvrcvinfo) | |
2147 | sctp_ulpevent_read_rcvinfo(event, msg); | |
1da177e4 | 2148 | /* Check if we allow SCTP_SNDRCVINFO. */ |
2cc0eeb6 | 2149 | if (sctp_ulpevent_type_enabled(sp->subscribe, SCTP_DATA_IO_EVENT)) |
1da177e4 | 2150 | sctp_ulpevent_read_sndrcvinfo(event, msg); |
0d3a421d | 2151 | |
1da177e4 LT |
2152 | err = copied; |
2153 | ||
2154 | /* If skb's length exceeds the user's buffer, update the skb and | |
2155 | * push it back to the receive_queue so that the next call to | |
2156 | * recvmsg() will return the remaining data. Don't set MSG_EOR. | |
2157 | */ | |
2158 | if (skb_len > copied) { | |
2159 | msg->msg_flags &= ~MSG_EOR; | |
2160 | if (flags & MSG_PEEK) | |
2161 | goto out_free; | |
2162 | sctp_skb_pull(skb, copied); | |
2163 | skb_queue_head(&sk->sk_receive_queue, skb); | |
2164 | ||
362d5204 DB |
2165 | /* When only partial message is copied to the user, increase |
2166 | * rwnd by that amount. If all the data in the skb is read, | |
2167 | * rwnd is updated when the event is freed. | |
2168 | */ | |
2169 | if (!sctp_ulpevent_is_notification(event)) | |
2170 | sctp_assoc_rwnd_increase(event->asoc, copied); | |
1da177e4 LT |
2171 | goto out; |
2172 | } else if ((event->msg_flags & MSG_NOTIFICATION) || | |
2173 | (event->msg_flags & MSG_EOR)) | |
2174 | msg->msg_flags |= MSG_EOR; | |
2175 | else | |
2176 | msg->msg_flags &= ~MSG_EOR; | |
2177 | ||
2178 | out_free: | |
2179 | if (flags & MSG_PEEK) { | |
2180 | /* Release the skb reference acquired after peeking the skb in | |
2181 | * sctp_skb_recv_datagram(). | |
2182 | */ | |
2183 | kfree_skb(skb); | |
2184 | } else { | |
2185 | /* Free the event which includes releasing the reference to | |
2186 | * the owner of the skb, freeing the skb and updating the | |
2187 | * rwnd. | |
2188 | */ | |
2189 | sctp_ulpevent_free(event); | |
2190 | } | |
2191 | out: | |
048ed4b6 | 2192 | release_sock(sk); |
1da177e4 LT |
2193 | return err; |
2194 | } | |
2195 | ||
2196 | /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS) | |
2197 | * | |
2198 | * This option is a on/off flag. If enabled no SCTP message | |
2199 | * fragmentation will be performed. Instead if a message being sent | |
2200 | * exceeds the current PMTU size, the message will NOT be sent and | |
2201 | * instead a error will be indicated to the user. | |
2202 | */ | |
10835825 | 2203 | static int sctp_setsockopt_disable_fragments(struct sock *sk, int *val, |
b7058842 | 2204 | unsigned int optlen) |
1da177e4 | 2205 | { |
1da177e4 LT |
2206 | if (optlen < sizeof(int)) |
2207 | return -EINVAL; | |
10835825 | 2208 | sctp_sk(sk)->disable_fragments = (*val == 0) ? 0 : 1; |
1da177e4 LT |
2209 | return 0; |
2210 | } | |
2211 | ||
a98d21a1 | 2212 | static int sctp_setsockopt_events(struct sock *sk, __u8 *sn_type, |
b7058842 | 2213 | unsigned int optlen) |
1da177e4 | 2214 | { |
2cc0eeb6 | 2215 | struct sctp_sock *sp = sctp_sk(sk); |
a1e3a059 | 2216 | struct sctp_association *asoc; |
2cc0eeb6 | 2217 | int i; |
94912301 | 2218 | |
7e8616d8 | 2219 | if (optlen > sizeof(struct sctp_event_subscribe)) |
1da177e4 | 2220 | return -EINVAL; |
2cc0eeb6 | 2221 | |
2cc0eeb6 XL |
2222 | for (i = 0; i < optlen; i++) |
2223 | sctp_ulpevent_type_set(&sp->subscribe, SCTP_SN_TYPE_BASE + i, | |
2224 | sn_type[i]); | |
2225 | ||
a1e3a059 XL |
2226 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) |
2227 | asoc->subscribe = sctp_sk(sk)->subscribe; | |
2228 | ||
bbbea41d | 2229 | /* At the time when a user app subscribes to SCTP_SENDER_DRY_EVENT, |
94912301 WY |
2230 | * if there is no data to be sent or retransmit, the stack will |
2231 | * immediately send up this notification. | |
2232 | */ | |
2cc0eeb6 | 2233 | if (sctp_ulpevent_type_enabled(sp->subscribe, SCTP_SENDER_DRY_EVENT)) { |
2cc0eeb6 | 2234 | struct sctp_ulpevent *event; |
94912301 | 2235 | |
a1e3a059 | 2236 | asoc = sctp_id2assoc(sk, 0); |
94912301 WY |
2237 | if (asoc && sctp_outq_is_empty(&asoc->outqueue)) { |
2238 | event = sctp_ulpevent_make_sender_dry_event(asoc, | |
2e83acb9 | 2239 | GFP_USER | __GFP_NOWARN); |
94912301 WY |
2240 | if (!event) |
2241 | return -ENOMEM; | |
2242 | ||
9162e0ed | 2243 | asoc->stream.si->enqueue_event(&asoc->ulpq, event); |
94912301 WY |
2244 | } |
2245 | } | |
2246 | ||
1da177e4 LT |
2247 | return 0; |
2248 | } | |
2249 | ||
2250 | /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE) | |
2251 | * | |
2252 | * This socket option is applicable to the UDP-style socket only. When | |
2253 | * set it will cause associations that are idle for more than the | |
2254 | * specified number of seconds to automatically close. An association | |
2255 | * being idle is defined an association that has NOT sent or received | |
2256 | * user data. The special value of '0' indicates that no automatic | |
2257 | * close of any associations should be performed. The option expects an | |
2258 | * integer defining the number of seconds of idle time before an | |
2259 | * association is closed. | |
2260 | */ | |
0b49a65c | 2261 | static int sctp_setsockopt_autoclose(struct sock *sk, u32 *optval, |
b7058842 | 2262 | unsigned int optlen) |
1da177e4 LT |
2263 | { |
2264 | struct sctp_sock *sp = sctp_sk(sk); | |
9f70f46b | 2265 | struct net *net = sock_net(sk); |
1da177e4 LT |
2266 | |
2267 | /* Applicable to UDP-style socket only */ | |
2268 | if (sctp_style(sk, TCP)) | |
2269 | return -EOPNOTSUPP; | |
2270 | if (optlen != sizeof(int)) | |
2271 | return -EINVAL; | |
1da177e4 | 2272 | |
0b49a65c | 2273 | sp->autoclose = *optval; |
9f70f46b NH |
2274 | if (sp->autoclose > net->sctp.max_autoclose) |
2275 | sp->autoclose = net->sctp.max_autoclose; | |
2276 | ||
1da177e4 LT |
2277 | return 0; |
2278 | } | |
2279 | ||
2280 | /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS) | |
2281 | * | |
2282 | * Applications can enable or disable heartbeats for any peer address of | |
2283 | * an association, modify an address's heartbeat interval, force a | |
2284 | * heartbeat to be sent immediately, and adjust the address's maximum | |
2285 | * number of retransmissions sent before an address is considered | |
2286 | * unreachable. The following structure is used to access and modify an | |
2287 | * address's parameters: | |
2288 | * | |
2289 | * struct sctp_paddrparams { | |
52ccb8e9 FF |
2290 | * sctp_assoc_t spp_assoc_id; |
2291 | * struct sockaddr_storage spp_address; | |
2292 | * uint32_t spp_hbinterval; | |
2293 | * uint16_t spp_pathmaxrxt; | |
2294 | * uint32_t spp_pathmtu; | |
2295 | * uint32_t spp_sackdelay; | |
2296 | * uint32_t spp_flags; | |
0b0dce7a XL |
2297 | * uint32_t spp_ipv6_flowlabel; |
2298 | * uint8_t spp_dscp; | |
52ccb8e9 FF |
2299 | * }; |
2300 | * | |
2301 | * spp_assoc_id - (one-to-many style socket) This is filled in the | |
2302 | * application, and identifies the association for | |
2303 | * this query. | |
1da177e4 LT |
2304 | * spp_address - This specifies which address is of interest. |
2305 | * spp_hbinterval - This contains the value of the heartbeat interval, | |
52ccb8e9 FF |
2306 | * in milliseconds. If a value of zero |
2307 | * is present in this field then no changes are to | |
2308 | * be made to this parameter. | |
1da177e4 LT |
2309 | * spp_pathmaxrxt - This contains the maximum number of |
2310 | * retransmissions before this address shall be | |
52ccb8e9 FF |
2311 | * considered unreachable. If a value of zero |
2312 | * is present in this field then no changes are to | |
2313 | * be made to this parameter. | |
2314 | * spp_pathmtu - When Path MTU discovery is disabled the value | |
2315 | * specified here will be the "fixed" path mtu. | |
2316 | * Note that if the spp_address field is empty | |
2317 | * then all associations on this address will | |
2318 | * have this fixed path mtu set upon them. | |
2319 | * | |
2320 | * spp_sackdelay - When delayed sack is enabled, this value specifies | |
2321 | * the number of milliseconds that sacks will be delayed | |
2322 | * for. This value will apply to all addresses of an | |
2323 | * association if the spp_address field is empty. Note | |
2324 | * also, that if delayed sack is enabled and this | |
2325 | * value is set to 0, no change is made to the last | |
2326 | * recorded delayed sack timer value. | |
2327 | * | |
2328 | * spp_flags - These flags are used to control various features | |
2329 | * on an association. The flag field may contain | |
2330 | * zero or more of the following options. | |
2331 | * | |
2332 | * SPP_HB_ENABLE - Enable heartbeats on the | |
2333 | * specified address. Note that if the address | |
2334 | * field is empty all addresses for the association | |
2335 | * have heartbeats enabled upon them. | |
2336 | * | |
2337 | * SPP_HB_DISABLE - Disable heartbeats on the | |
2338 | * speicifed address. Note that if the address | |
2339 | * field is empty all addresses for the association | |
2340 | * will have their heartbeats disabled. Note also | |
2341 | * that SPP_HB_ENABLE and SPP_HB_DISABLE are | |
2342 | * mutually exclusive, only one of these two should | |
2343 | * be specified. Enabling both fields will have | |
2344 | * undetermined results. | |
2345 | * | |
2346 | * SPP_HB_DEMAND - Request a user initiated heartbeat | |
2347 | * to be made immediately. | |
2348 | * | |
bdf3092a VY |
2349 | * SPP_HB_TIME_IS_ZERO - Specify's that the time for |
2350 | * heartbeat delayis to be set to the value of 0 | |
2351 | * milliseconds. | |
2352 | * | |
52ccb8e9 FF |
2353 | * SPP_PMTUD_ENABLE - This field will enable PMTU |
2354 | * discovery upon the specified address. Note that | |
2355 | * if the address feild is empty then all addresses | |
2356 | * on the association are effected. | |
2357 | * | |
2358 | * SPP_PMTUD_DISABLE - This field will disable PMTU | |
2359 | * discovery upon the specified address. Note that | |
2360 | * if the address feild is empty then all addresses | |
2361 | * on the association are effected. Not also that | |
2362 | * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually | |
2363 | * exclusive. Enabling both will have undetermined | |
2364 | * results. | |
2365 | * | |
2366 | * SPP_SACKDELAY_ENABLE - Setting this flag turns | |
2367 | * on delayed sack. The time specified in spp_sackdelay | |
2368 | * is used to specify the sack delay for this address. Note | |
2369 | * that if spp_address is empty then all addresses will | |
2370 | * enable delayed sack and take on the sack delay | |
2371 | * value specified in spp_sackdelay. | |
2372 | * SPP_SACKDELAY_DISABLE - Setting this flag turns | |
2373 | * off delayed sack. If the spp_address field is blank then | |
2374 | * delayed sack is disabled for the entire association. Note | |
2375 | * also that this field is mutually exclusive to | |
2376 | * SPP_SACKDELAY_ENABLE, setting both will have undefined | |
2377 | * results. | |
0b0dce7a XL |
2378 | * |
2379 | * SPP_IPV6_FLOWLABEL: Setting this flag enables the | |
2380 | * setting of the IPV6 flow label value. The value is | |
2381 | * contained in the spp_ipv6_flowlabel field. | |
2382 | * Upon retrieval, this flag will be set to indicate that | |
2383 | * the spp_ipv6_flowlabel field has a valid value returned. | |
2384 | * If a specific destination address is set (in the | |
2385 | * spp_address field), then the value returned is that of | |
2386 | * the address. If just an association is specified (and | |
2387 | * no address), then the association's default flow label | |
2388 | * is returned. If neither an association nor a destination | |
2389 | * is specified, then the socket's default flow label is | |
2390 | * returned. For non-IPv6 sockets, this flag will be left | |
2391 | * cleared. | |
2392 | * | |
2393 | * SPP_DSCP: Setting this flag enables the setting of the | |
2394 | * Differentiated Services Code Point (DSCP) value | |
2395 | * associated with either the association or a specific | |
2396 | * address. The value is obtained in the spp_dscp field. | |
2397 | * Upon retrieval, this flag will be set to indicate that | |
2398 | * the spp_dscp field has a valid value returned. If a | |
2399 | * specific destination address is set when called (in the | |
2400 | * spp_address field), then that specific destination | |
2401 | * address's DSCP value is returned. If just an association | |
2402 | * is specified, then the association's default DSCP is | |
2403 | * returned. If neither an association nor a destination is | |
2404 | * specified, then the socket's default DSCP is returned. | |
2405 | * | |
2406 | * spp_ipv6_flowlabel | |
2407 | * - This field is used in conjunction with the | |
2408 | * SPP_IPV6_FLOWLABEL flag and contains the IPv6 flow label. | |
2409 | * The 20 least significant bits are used for the flow | |
2410 | * label. This setting has precedence over any IPv6-layer | |
2411 | * setting. | |
2412 | * | |
2413 | * spp_dscp - This field is used in conjunction with the SPP_DSCP flag | |
2414 | * and contains the DSCP. The 6 most significant bits are | |
2415 | * used for the DSCP. This setting has precedence over any | |
2416 | * IPv4- or IPv6- layer setting. | |
1da177e4 | 2417 | */ |
16164366 AB |
2418 | static int sctp_apply_peer_addr_params(struct sctp_paddrparams *params, |
2419 | struct sctp_transport *trans, | |
2420 | struct sctp_association *asoc, | |
2421 | struct sctp_sock *sp, | |
2422 | int hb_change, | |
2423 | int pmtud_change, | |
2424 | int sackdelay_change) | |
52ccb8e9 FF |
2425 | { |
2426 | int error; | |
2427 | ||
2428 | if (params->spp_flags & SPP_HB_DEMAND && trans) { | |
4e7696d9 XL |
2429 | error = sctp_primitive_REQUESTHEARTBEAT(trans->asoc->base.net, |
2430 | trans->asoc, trans); | |
52ccb8e9 FF |
2431 | if (error) |
2432 | return error; | |
2433 | } | |
2434 | ||
bdf3092a VY |
2435 | /* Note that unless the spp_flag is set to SPP_HB_ENABLE the value of |
2436 | * this field is ignored. Note also that a value of zero indicates | |
2437 | * the current setting should be left unchanged. | |
2438 | */ | |
2439 | if (params->spp_flags & SPP_HB_ENABLE) { | |
2440 | ||
2441 | /* Re-zero the interval if the SPP_HB_TIME_IS_ZERO is | |
2442 | * set. This lets us use 0 value when this flag | |
2443 | * is set. | |
2444 | */ | |
2445 | if (params->spp_flags & SPP_HB_TIME_IS_ZERO) | |
2446 | params->spp_hbinterval = 0; | |
2447 | ||
2448 | if (params->spp_hbinterval || | |
2449 | (params->spp_flags & SPP_HB_TIME_IS_ZERO)) { | |
2450 | if (trans) { | |
2451 | trans->hbinterval = | |
2452 | msecs_to_jiffies(params->spp_hbinterval); | |
2453 | } else if (asoc) { | |
2454 | asoc->hbinterval = | |
2455 | msecs_to_jiffies(params->spp_hbinterval); | |
2456 | } else { | |
2457 | sp->hbinterval = params->spp_hbinterval; | |
2458 | } | |
52ccb8e9 FF |
2459 | } |
2460 | } | |
2461 | ||
2462 | if (hb_change) { | |
2463 | if (trans) { | |
2464 | trans->param_flags = | |
2465 | (trans->param_flags & ~SPP_HB) | hb_change; | |
2466 | } else if (asoc) { | |
2467 | asoc->param_flags = | |
2468 | (asoc->param_flags & ~SPP_HB) | hb_change; | |
2469 | } else { | |
2470 | sp->param_flags = | |
2471 | (sp->param_flags & ~SPP_HB) | hb_change; | |
2472 | } | |
2473 | } | |
2474 | ||
bdf3092a VY |
2475 | /* When Path MTU discovery is disabled the value specified here will |
2476 | * be the "fixed" path mtu (i.e. the value of the spp_flags field must | |
2477 | * include the flag SPP_PMTUD_DISABLE for this field to have any | |
2478 | * effect). | |
2479 | */ | |
2480 | if ((params->spp_flags & SPP_PMTUD_DISABLE) && params->spp_pathmtu) { | |
52ccb8e9 FF |
2481 | if (trans) { |
2482 | trans->pathmtu = params->spp_pathmtu; | |
3ebfdf08 | 2483 | sctp_assoc_sync_pmtu(asoc); |
52ccb8e9 | 2484 | } else if (asoc) { |
c4b2893d | 2485 | sctp_assoc_set_pmtu(asoc, params->spp_pathmtu); |
52ccb8e9 FF |
2486 | } else { |
2487 | sp->pathmtu = params->spp_pathmtu; | |
2488 | } | |
2489 | } | |
2490 | ||
2491 | if (pmtud_change) { | |
2492 | if (trans) { | |
2493 | int update = (trans->param_flags & SPP_PMTUD_DISABLE) && | |
2494 | (params->spp_flags & SPP_PMTUD_ENABLE); | |
2495 | trans->param_flags = | |
2496 | (trans->param_flags & ~SPP_PMTUD) | pmtud_change; | |
2497 | if (update) { | |
9914ae3c | 2498 | sctp_transport_pmtu(trans, sctp_opt2sk(sp)); |
3ebfdf08 | 2499 | sctp_assoc_sync_pmtu(asoc); |
52ccb8e9 | 2500 | } |
7307e4fa | 2501 | sctp_transport_pl_reset(trans); |
52ccb8e9 FF |
2502 | } else if (asoc) { |
2503 | asoc->param_flags = | |
2504 | (asoc->param_flags & ~SPP_PMTUD) | pmtud_change; | |
2505 | } else { | |
2506 | sp->param_flags = | |
2507 | (sp->param_flags & ~SPP_PMTUD) | pmtud_change; | |
2508 | } | |
2509 | } | |
2510 | ||
bdf3092a VY |
2511 | /* Note that unless the spp_flag is set to SPP_SACKDELAY_ENABLE the |
2512 | * value of this field is ignored. Note also that a value of zero | |
2513 | * indicates the current setting should be left unchanged. | |
2514 | */ | |
2515 | if ((params->spp_flags & SPP_SACKDELAY_ENABLE) && params->spp_sackdelay) { | |
52ccb8e9 FF |
2516 | if (trans) { |
2517 | trans->sackdelay = | |
2518 | msecs_to_jiffies(params->spp_sackdelay); | |
2519 | } else if (asoc) { | |
2520 | asoc->sackdelay = | |
2521 | msecs_to_jiffies(params->spp_sackdelay); | |
2522 | } else { | |
2523 | sp->sackdelay = params->spp_sackdelay; | |
2524 | } | |
2525 | } | |
2526 | ||
2527 | if (sackdelay_change) { | |
2528 | if (trans) { | |
2529 | trans->param_flags = | |
2530 | (trans->param_flags & ~SPP_SACKDELAY) | | |
2531 | sackdelay_change; | |
2532 | } else if (asoc) { | |
2533 | asoc->param_flags = | |
2534 | (asoc->param_flags & ~SPP_SACKDELAY) | | |
2535 | sackdelay_change; | |
2536 | } else { | |
2537 | sp->param_flags = | |
2538 | (sp->param_flags & ~SPP_SACKDELAY) | | |
2539 | sackdelay_change; | |
2540 | } | |
2541 | } | |
2542 | ||
37051f73 APO |
2543 | /* Note that a value of zero indicates the current setting should be |
2544 | left unchanged. | |
bdf3092a | 2545 | */ |
37051f73 | 2546 | if (params->spp_pathmaxrxt) { |
52ccb8e9 FF |
2547 | if (trans) { |
2548 | trans->pathmaxrxt = params->spp_pathmaxrxt; | |
2549 | } else if (asoc) { | |
2550 | asoc->pathmaxrxt = params->spp_pathmaxrxt; | |
2551 | } else { | |
2552 | sp->pathmaxrxt = params->spp_pathmaxrxt; | |
2553 | } | |
2554 | } | |
2555 | ||
0b0dce7a | 2556 | if (params->spp_flags & SPP_IPV6_FLOWLABEL) { |
741880e1 XL |
2557 | if (trans) { |
2558 | if (trans->ipaddr.sa.sa_family == AF_INET6) { | |
2559 | trans->flowlabel = params->spp_ipv6_flowlabel & | |
2560 | SCTP_FLOWLABEL_VAL_MASK; | |
2561 | trans->flowlabel |= SCTP_FLOWLABEL_SET_MASK; | |
2562 | } | |
0b0dce7a | 2563 | } else if (asoc) { |
af8a2b8b XL |
2564 | struct sctp_transport *t; |
2565 | ||
2566 | list_for_each_entry(t, &asoc->peer.transport_addr_list, | |
0b0dce7a | 2567 | transports) { |
af8a2b8b | 2568 | if (t->ipaddr.sa.sa_family != AF_INET6) |
0b0dce7a | 2569 | continue; |
af8a2b8b XL |
2570 | t->flowlabel = params->spp_ipv6_flowlabel & |
2571 | SCTP_FLOWLABEL_VAL_MASK; | |
2572 | t->flowlabel |= SCTP_FLOWLABEL_SET_MASK; | |
0b0dce7a XL |
2573 | } |
2574 | asoc->flowlabel = params->spp_ipv6_flowlabel & | |
2575 | SCTP_FLOWLABEL_VAL_MASK; | |
2576 | asoc->flowlabel |= SCTP_FLOWLABEL_SET_MASK; | |
2577 | } else if (sctp_opt2sk(sp)->sk_family == AF_INET6) { | |
2578 | sp->flowlabel = params->spp_ipv6_flowlabel & | |
2579 | SCTP_FLOWLABEL_VAL_MASK; | |
2580 | sp->flowlabel |= SCTP_FLOWLABEL_SET_MASK; | |
2581 | } | |
2582 | } | |
2583 | ||
2584 | if (params->spp_flags & SPP_DSCP) { | |
2585 | if (trans) { | |
2586 | trans->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK; | |
2587 | trans->dscp |= SCTP_DSCP_SET_MASK; | |
2588 | } else if (asoc) { | |
af8a2b8b XL |
2589 | struct sctp_transport *t; |
2590 | ||
2591 | list_for_each_entry(t, &asoc->peer.transport_addr_list, | |
0b0dce7a | 2592 | transports) { |
af8a2b8b XL |
2593 | t->dscp = params->spp_dscp & |
2594 | SCTP_DSCP_VAL_MASK; | |
2595 | t->dscp |= SCTP_DSCP_SET_MASK; | |
0b0dce7a XL |
2596 | } |
2597 | asoc->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK; | |
2598 | asoc->dscp |= SCTP_DSCP_SET_MASK; | |
2599 | } else { | |
2600 | sp->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK; | |
2601 | sp->dscp |= SCTP_DSCP_SET_MASK; | |
2602 | } | |
2603 | } | |
2604 | ||
52ccb8e9 FF |
2605 | return 0; |
2606 | } | |
2607 | ||
1da177e4 | 2608 | static int sctp_setsockopt_peer_addr_params(struct sock *sk, |
9b7b0d1a | 2609 | struct sctp_paddrparams *params, |
b7058842 | 2610 | unsigned int optlen) |
1da177e4 | 2611 | { |
52ccb8e9 FF |
2612 | struct sctp_transport *trans = NULL; |
2613 | struct sctp_association *asoc = NULL; | |
2614 | struct sctp_sock *sp = sctp_sk(sk); | |
1da177e4 | 2615 | int error; |
52ccb8e9 | 2616 | int hb_change, pmtud_change, sackdelay_change; |
1da177e4 | 2617 | |
9b7b0d1a | 2618 | if (optlen == ALIGN(offsetof(struct sctp_paddrparams, |
0b0dce7a | 2619 | spp_ipv6_flowlabel), 4)) { |
9b7b0d1a | 2620 | if (params->spp_flags & (SPP_DSCP | SPP_IPV6_FLOWLABEL)) |
0b0dce7a | 2621 | return -EINVAL; |
9b7b0d1a | 2622 | } else if (optlen != sizeof(*params)) { |
cb3f837b | 2623 | return -EINVAL; |
0b0dce7a | 2624 | } |
1da177e4 | 2625 | |
52ccb8e9 | 2626 | /* Validate flags and value parameters. */ |
9b7b0d1a CH |
2627 | hb_change = params->spp_flags & SPP_HB; |
2628 | pmtud_change = params->spp_flags & SPP_PMTUD; | |
2629 | sackdelay_change = params->spp_flags & SPP_SACKDELAY; | |
52ccb8e9 FF |
2630 | |
2631 | if (hb_change == SPP_HB || | |
2632 | pmtud_change == SPP_PMTUD || | |
2633 | sackdelay_change == SPP_SACKDELAY || | |
9b7b0d1a CH |
2634 | params->spp_sackdelay > 500 || |
2635 | (params->spp_pathmtu && | |
2636 | params->spp_pathmtu < SCTP_DEFAULT_MINSEGMENT)) | |
52ccb8e9 | 2637 | return -EINVAL; |
1da177e4 | 2638 | |
52ccb8e9 FF |
2639 | /* If an address other than INADDR_ANY is specified, and |
2640 | * no transport is found, then the request is invalid. | |
2641 | */ | |
9b7b0d1a CH |
2642 | if (!sctp_is_any(sk, (union sctp_addr *)¶ms->spp_address)) { |
2643 | trans = sctp_addr_id2transport(sk, ¶ms->spp_address, | |
2644 | params->spp_assoc_id); | |
52ccb8e9 | 2645 | if (!trans) |
1da177e4 | 2646 | return -EINVAL; |
1da177e4 LT |
2647 | } |
2648 | ||
b99e5e02 XL |
2649 | /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the |
2650 | * socket is a one to many style socket, and an association | |
2651 | * was not found, then the id was invalid. | |
52ccb8e9 | 2652 | */ |
9b7b0d1a CH |
2653 | asoc = sctp_id2assoc(sk, params->spp_assoc_id); |
2654 | if (!asoc && params->spp_assoc_id != SCTP_FUTURE_ASSOC && | |
b99e5e02 | 2655 | sctp_style(sk, UDP)) |
1da177e4 LT |
2656 | return -EINVAL; |
2657 | ||
52ccb8e9 FF |
2658 | /* Heartbeat demand can only be sent on a transport or |
2659 | * association, but not a socket. | |
1da177e4 | 2660 | */ |
9b7b0d1a | 2661 | if (params->spp_flags & SPP_HB_DEMAND && !trans && !asoc) |
52ccb8e9 FF |
2662 | return -EINVAL; |
2663 | ||
2664 | /* Process parameters. */ | |
9b7b0d1a | 2665 | error = sctp_apply_peer_addr_params(params, trans, asoc, sp, |
52ccb8e9 FF |
2666 | hb_change, pmtud_change, |
2667 | sackdelay_change); | |
1da177e4 | 2668 | |
52ccb8e9 FF |
2669 | if (error) |
2670 | return error; | |
2671 | ||
2672 | /* If changes are for association, also apply parameters to each | |
2673 | * transport. | |
1da177e4 | 2674 | */ |
52ccb8e9 | 2675 | if (!trans && asoc) { |
9dbc15f0 RD |
2676 | list_for_each_entry(trans, &asoc->peer.transport_addr_list, |
2677 | transports) { | |
9b7b0d1a | 2678 | sctp_apply_peer_addr_params(params, trans, asoc, sp, |
52ccb8e9 FF |
2679 | hb_change, pmtud_change, |
2680 | sackdelay_change); | |
2681 | } | |
2682 | } | |
1da177e4 LT |
2683 | |
2684 | return 0; | |
2685 | } | |
2686 | ||
0ea5e4df | 2687 | static inline __u32 sctp_spp_sackdelay_enable(__u32 param_flags) |
2688 | { | |
2689 | return (param_flags & ~SPP_SACKDELAY) | SPP_SACKDELAY_ENABLE; | |
2690 | } | |
2691 | ||
2692 | static inline __u32 sctp_spp_sackdelay_disable(__u32 param_flags) | |
2693 | { | |
2694 | return (param_flags & ~SPP_SACKDELAY) | SPP_SACKDELAY_DISABLE; | |
2695 | } | |
2696 | ||
9c5829e1 XL |
2697 | static void sctp_apply_asoc_delayed_ack(struct sctp_sack_info *params, |
2698 | struct sctp_association *asoc) | |
2699 | { | |
2700 | struct sctp_transport *trans; | |
2701 | ||
2702 | if (params->sack_delay) { | |
2703 | asoc->sackdelay = msecs_to_jiffies(params->sack_delay); | |
2704 | asoc->param_flags = | |
2705 | sctp_spp_sackdelay_enable(asoc->param_flags); | |
2706 | } | |
2707 | if (params->sack_freq == 1) { | |
2708 | asoc->param_flags = | |
2709 | sctp_spp_sackdelay_disable(asoc->param_flags); | |
2710 | } else if (params->sack_freq > 1) { | |
2711 | asoc->sackfreq = params->sack_freq; | |
2712 | asoc->param_flags = | |
2713 | sctp_spp_sackdelay_enable(asoc->param_flags); | |
2714 | } | |
2715 | ||
2716 | list_for_each_entry(trans, &asoc->peer.transport_addr_list, | |
2717 | transports) { | |
2718 | if (params->sack_delay) { | |
2719 | trans->sackdelay = msecs_to_jiffies(params->sack_delay); | |
2720 | trans->param_flags = | |
2721 | sctp_spp_sackdelay_enable(trans->param_flags); | |
2722 | } | |
2723 | if (params->sack_freq == 1) { | |
2724 | trans->param_flags = | |
2725 | sctp_spp_sackdelay_disable(trans->param_flags); | |
2726 | } else if (params->sack_freq > 1) { | |
2727 | trans->sackfreq = params->sack_freq; | |
2728 | trans->param_flags = | |
2729 | sctp_spp_sackdelay_enable(trans->param_flags); | |
2730 | } | |
2731 | } | |
2732 | } | |
2733 | ||
d364d927 WY |
2734 | /* |
2735 | * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK) | |
2736 | * | |
2737 | * This option will effect the way delayed acks are performed. This | |
2738 | * option allows you to get or set the delayed ack time, in | |
2739 | * milliseconds. It also allows changing the delayed ack frequency. | |
2740 | * Changing the frequency to 1 disables the delayed sack algorithm. If | |
2741 | * the assoc_id is 0, then this sets or gets the endpoints default | |
2742 | * values. If the assoc_id field is non-zero, then the set or get | |
2743 | * effects the specified association for the one to many model (the | |
2744 | * assoc_id field is ignored by the one to one model). Note that if | |
2745 | * sack_delay or sack_freq are 0 when setting this option, then the | |
2746 | * current values will remain unchanged. | |
2747 | * | |
2748 | * struct sctp_sack_info { | |
2749 | * sctp_assoc_t sack_assoc_id; | |
2750 | * uint32_t sack_delay; | |
2751 | * uint32_t sack_freq; | |
2752 | * }; | |
2753 | * | |
2754 | * sack_assoc_id - This parameter, indicates which association the user | |
2755 | * is performing an action upon. Note that if this field's value is | |
2756 | * zero then the endpoints default value is changed (effecting future | |
2757 | * associations only). | |
2758 | * | |
2759 | * sack_delay - This parameter contains the number of milliseconds that | |
2760 | * the user is requesting the delayed ACK timer be set to. Note that | |
2761 | * this value is defined in the standard to be between 200 and 500 | |
2762 | * milliseconds. | |
2763 | * | |
2764 | * sack_freq - This parameter contains the number of packets that must | |
2765 | * be received before a sack is sent without waiting for the delay | |
2766 | * timer to expire. The default value for this is 2, setting this | |
2767 | * value to 1 will disable the delayed sack algorithm. | |
7708610b | 2768 | */ |
dfd3d526 CH |
2769 | static int __sctp_setsockopt_delayed_ack(struct sock *sk, |
2770 | struct sctp_sack_info *params) | |
7708610b | 2771 | { |
9c5829e1 XL |
2772 | struct sctp_sock *sp = sctp_sk(sk); |
2773 | struct sctp_association *asoc; | |
7708610b | 2774 | |
7708610b | 2775 | /* Validate value parameter. */ |
ebb25def | 2776 | if (params->sack_delay > 500) |
7708610b FF |
2777 | return -EINVAL; |
2778 | ||
9c5829e1 XL |
2779 | /* Get association, if sack_assoc_id != SCTP_FUTURE_ASSOC and the |
2780 | * socket is a one to many style socket, and an association | |
2781 | * was not found, then the id was invalid. | |
d808ad9a | 2782 | */ |
ebb25def CH |
2783 | asoc = sctp_id2assoc(sk, params->sack_assoc_id); |
2784 | if (!asoc && params->sack_assoc_id > SCTP_ALL_ASSOC && | |
9c5829e1 | 2785 | sctp_style(sk, UDP)) |
7708610b FF |
2786 | return -EINVAL; |
2787 | ||
9c5829e1 | 2788 | if (asoc) { |
ebb25def | 2789 | sctp_apply_asoc_delayed_ack(params, asoc); |
9c5829e1 XL |
2790 | |
2791 | return 0; | |
2792 | } | |
2793 | ||
8e2614fc | 2794 | if (sctp_style(sk, TCP)) |
ebb25def | 2795 | params->sack_assoc_id = SCTP_FUTURE_ASSOC; |
8e2614fc | 2796 | |
ebb25def CH |
2797 | if (params->sack_assoc_id == SCTP_FUTURE_ASSOC || |
2798 | params->sack_assoc_id == SCTP_ALL_ASSOC) { | |
2799 | if (params->sack_delay) { | |
2800 | sp->sackdelay = params->sack_delay; | |
d808ad9a | 2801 | sp->param_flags = |
0ea5e4df | 2802 | sctp_spp_sackdelay_enable(sp->param_flags); |
7708610b | 2803 | } |
ebb25def | 2804 | if (params->sack_freq == 1) { |
d808ad9a | 2805 | sp->param_flags = |
0ea5e4df | 2806 | sctp_spp_sackdelay_disable(sp->param_flags); |
ebb25def CH |
2807 | } else if (params->sack_freq > 1) { |
2808 | sp->sackfreq = params->sack_freq; | |
d364d927 | 2809 | sp->param_flags = |
0ea5e4df | 2810 | sctp_spp_sackdelay_enable(sp->param_flags); |
d364d927 | 2811 | } |
7708610b FF |
2812 | } |
2813 | ||
ebb25def CH |
2814 | if (params->sack_assoc_id == SCTP_CURRENT_ASSOC || |
2815 | params->sack_assoc_id == SCTP_ALL_ASSOC) | |
9c5829e1 | 2816 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) |
ebb25def | 2817 | sctp_apply_asoc_delayed_ack(params, asoc); |
d808ad9a | 2818 | |
7708610b FF |
2819 | return 0; |
2820 | } | |
2821 | ||
dfd3d526 CH |
2822 | static int sctp_setsockopt_delayed_ack(struct sock *sk, |
2823 | struct sctp_sack_info *params, | |
2824 | unsigned int optlen) | |
2825 | { | |
2826 | if (optlen == sizeof(struct sctp_assoc_value)) { | |
2827 | struct sctp_assoc_value *v = (struct sctp_assoc_value *)params; | |
2828 | struct sctp_sack_info p; | |
2829 | ||
2830 | pr_warn_ratelimited(DEPRECATED | |
2831 | "%s (pid %d) " | |
2832 | "Use of struct sctp_assoc_value in delayed_ack socket option.\n" | |
2833 | "Use struct sctp_sack_info instead\n", | |
2834 | current->comm, task_pid_nr(current)); | |
2835 | ||
2836 | p.sack_assoc_id = v->assoc_id; | |
2837 | p.sack_delay = v->assoc_value; | |
2838 | p.sack_freq = v->assoc_value ? 0 : 1; | |
2839 | return __sctp_setsockopt_delayed_ack(sk, &p); | |
2840 | } | |
2841 | ||
2842 | if (optlen != sizeof(struct sctp_sack_info)) | |
2843 | return -EINVAL; | |
2844 | if (params->sack_delay == 0 && params->sack_freq == 0) | |
2845 | return 0; | |
2846 | return __sctp_setsockopt_delayed_ack(sk, params); | |
2847 | } | |
2848 | ||
1da177e4 LT |
2849 | /* 7.1.3 Initialization Parameters (SCTP_INITMSG) |
2850 | * | |
2851 | * Applications can specify protocol parameters for the default association | |
2852 | * initialization. The option name argument to setsockopt() and getsockopt() | |
2853 | * is SCTP_INITMSG. | |
2854 | * | |
2855 | * Setting initialization parameters is effective only on an unconnected | |
2856 | * socket (for UDP-style sockets only future associations are effected | |
2857 | * by the change). With TCP-style sockets, this option is inherited by | |
2858 | * sockets derived from a listener socket. | |
2859 | */ | |
9dfa6f04 CH |
2860 | static int sctp_setsockopt_initmsg(struct sock *sk, struct sctp_initmsg *sinit, |
2861 | unsigned int optlen) | |
1da177e4 | 2862 | { |
1da177e4 LT |
2863 | struct sctp_sock *sp = sctp_sk(sk); |
2864 | ||
2865 | if (optlen != sizeof(struct sctp_initmsg)) | |
2866 | return -EINVAL; | |
1da177e4 | 2867 | |
9dfa6f04 CH |
2868 | if (sinit->sinit_num_ostreams) |
2869 | sp->initmsg.sinit_num_ostreams = sinit->sinit_num_ostreams; | |
2870 | if (sinit->sinit_max_instreams) | |
2871 | sp->initmsg.sinit_max_instreams = sinit->sinit_max_instreams; | |
2872 | if (sinit->sinit_max_attempts) | |
2873 | sp->initmsg.sinit_max_attempts = sinit->sinit_max_attempts; | |
2874 | if (sinit->sinit_max_init_timeo) | |
2875 | sp->initmsg.sinit_max_init_timeo = sinit->sinit_max_init_timeo; | |
1da177e4 LT |
2876 | |
2877 | return 0; | |
2878 | } | |
2879 | ||
2880 | /* | |
2881 | * 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM) | |
2882 | * | |
2883 | * Applications that wish to use the sendto() system call may wish to | |
2884 | * specify a default set of parameters that would normally be supplied | |
2885 | * through the inclusion of ancillary data. This socket option allows | |
2886 | * such an application to set the default sctp_sndrcvinfo structure. | |
2887 | * The application that wishes to use this socket option simply passes | |
2888 | * in to this call the sctp_sndrcvinfo structure defined in Section | |
2889 | * 5.2.2) The input parameters accepted by this call include | |
2890 | * sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context, | |
2891 | * sinfo_timetolive. The user must provide the sinfo_assoc_id field in | |
2892 | * to this call if the caller is using the UDP model. | |
2893 | */ | |
2894 | static int sctp_setsockopt_default_send_param(struct sock *sk, | |
c23ad6d2 | 2895 | struct sctp_sndrcvinfo *info, |
b7058842 | 2896 | unsigned int optlen) |
1da177e4 | 2897 | { |
1da177e4 | 2898 | struct sctp_sock *sp = sctp_sk(sk); |
6b3fd5f3 | 2899 | struct sctp_association *asoc; |
1da177e4 | 2900 | |
c23ad6d2 | 2901 | if (optlen != sizeof(*info)) |
1da177e4 | 2902 | return -EINVAL; |
c23ad6d2 | 2903 | if (info->sinfo_flags & |
6b3fd5f3 GOV |
2904 | ~(SCTP_UNORDERED | SCTP_ADDR_OVER | |
2905 | SCTP_ABORT | SCTP_EOF)) | |
2906 | return -EINVAL; | |
1da177e4 | 2907 | |
c23ad6d2 CH |
2908 | asoc = sctp_id2assoc(sk, info->sinfo_assoc_id); |
2909 | if (!asoc && info->sinfo_assoc_id > SCTP_ALL_ASSOC && | |
707e45b3 | 2910 | sctp_style(sk, UDP)) |
1da177e4 | 2911 | return -EINVAL; |
707e45b3 | 2912 | |
1da177e4 | 2913 | if (asoc) { |
c23ad6d2 CH |
2914 | asoc->default_stream = info->sinfo_stream; |
2915 | asoc->default_flags = info->sinfo_flags; | |
2916 | asoc->default_ppid = info->sinfo_ppid; | |
2917 | asoc->default_context = info->sinfo_context; | |
2918 | asoc->default_timetolive = info->sinfo_timetolive; | |
707e45b3 XL |
2919 | |
2920 | return 0; | |
2921 | } | |
2922 | ||
1354e72f | 2923 | if (sctp_style(sk, TCP)) |
c23ad6d2 CH |
2924 | info->sinfo_assoc_id = SCTP_FUTURE_ASSOC; |
2925 | ||
2926 | if (info->sinfo_assoc_id == SCTP_FUTURE_ASSOC || | |
2927 | info->sinfo_assoc_id == SCTP_ALL_ASSOC) { | |
2928 | sp->default_stream = info->sinfo_stream; | |
2929 | sp->default_flags = info->sinfo_flags; | |
2930 | sp->default_ppid = info->sinfo_ppid; | |
2931 | sp->default_context = info->sinfo_context; | |
2932 | sp->default_timetolive = info->sinfo_timetolive; | |
1da177e4 LT |
2933 | } |
2934 | ||
c23ad6d2 CH |
2935 | if (info->sinfo_assoc_id == SCTP_CURRENT_ASSOC || |
2936 | info->sinfo_assoc_id == SCTP_ALL_ASSOC) { | |
707e45b3 | 2937 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) { |
c23ad6d2 CH |
2938 | asoc->default_stream = info->sinfo_stream; |
2939 | asoc->default_flags = info->sinfo_flags; | |
2940 | asoc->default_ppid = info->sinfo_ppid; | |
2941 | asoc->default_context = info->sinfo_context; | |
2942 | asoc->default_timetolive = info->sinfo_timetolive; | |
707e45b3 XL |
2943 | } |
2944 | } | |
2945 | ||
1da177e4 LT |
2946 | return 0; |
2947 | } | |
2948 | ||
6b3fd5f3 GOV |
2949 | /* RFC6458, Section 8.1.31. Set/get Default Send Parameters |
2950 | * (SCTP_DEFAULT_SNDINFO) | |
2951 | */ | |
2952 | static int sctp_setsockopt_default_sndinfo(struct sock *sk, | |
8a2409d3 | 2953 | struct sctp_sndinfo *info, |
6b3fd5f3 GOV |
2954 | unsigned int optlen) |
2955 | { | |
2956 | struct sctp_sock *sp = sctp_sk(sk); | |
2957 | struct sctp_association *asoc; | |
6b3fd5f3 | 2958 | |
8a2409d3 | 2959 | if (optlen != sizeof(*info)) |
6b3fd5f3 | 2960 | return -EINVAL; |
8a2409d3 | 2961 | if (info->snd_flags & |
6b3fd5f3 GOV |
2962 | ~(SCTP_UNORDERED | SCTP_ADDR_OVER | |
2963 | SCTP_ABORT | SCTP_EOF)) | |
2964 | return -EINVAL; | |
2965 | ||
8a2409d3 CH |
2966 | asoc = sctp_id2assoc(sk, info->snd_assoc_id); |
2967 | if (!asoc && info->snd_assoc_id > SCTP_ALL_ASSOC && | |
92fc3bd9 | 2968 | sctp_style(sk, UDP)) |
6b3fd5f3 | 2969 | return -EINVAL; |
92fc3bd9 | 2970 | |
6b3fd5f3 | 2971 | if (asoc) { |
8a2409d3 CH |
2972 | asoc->default_stream = info->snd_sid; |
2973 | asoc->default_flags = info->snd_flags; | |
2974 | asoc->default_ppid = info->snd_ppid; | |
2975 | asoc->default_context = info->snd_context; | |
92fc3bd9 XL |
2976 | |
2977 | return 0; | |
2978 | } | |
2979 | ||
a842e65b | 2980 | if (sctp_style(sk, TCP)) |
8a2409d3 CH |
2981 | info->snd_assoc_id = SCTP_FUTURE_ASSOC; |
2982 | ||
2983 | if (info->snd_assoc_id == SCTP_FUTURE_ASSOC || | |
2984 | info->snd_assoc_id == SCTP_ALL_ASSOC) { | |
2985 | sp->default_stream = info->snd_sid; | |
2986 | sp->default_flags = info->snd_flags; | |
2987 | sp->default_ppid = info->snd_ppid; | |
2988 | sp->default_context = info->snd_context; | |
6b3fd5f3 GOV |
2989 | } |
2990 | ||
8a2409d3 CH |
2991 | if (info->snd_assoc_id == SCTP_CURRENT_ASSOC || |
2992 | info->snd_assoc_id == SCTP_ALL_ASSOC) { | |
92fc3bd9 | 2993 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) { |
8a2409d3 CH |
2994 | asoc->default_stream = info->snd_sid; |
2995 | asoc->default_flags = info->snd_flags; | |
2996 | asoc->default_ppid = info->snd_ppid; | |
2997 | asoc->default_context = info->snd_context; | |
92fc3bd9 XL |
2998 | } |
2999 | } | |
3000 | ||
6b3fd5f3 GOV |
3001 | return 0; |
3002 | } | |
3003 | ||
1da177e4 LT |
3004 | /* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR) |
3005 | * | |
3006 | * Requests that the local SCTP stack use the enclosed peer address as | |
3007 | * the association primary. The enclosed address must be one of the | |
3008 | * association peer's addresses. | |
3009 | */ | |
1eec6958 | 3010 | static int sctp_setsockopt_primary_addr(struct sock *sk, struct sctp_prim *prim, |
b7058842 | 3011 | unsigned int optlen) |
1da177e4 | 3012 | { |
1da177e4 | 3013 | struct sctp_transport *trans; |
2277c7cd RH |
3014 | struct sctp_af *af; |
3015 | int err; | |
1da177e4 LT |
3016 | |
3017 | if (optlen != sizeof(struct sctp_prim)) | |
3018 | return -EINVAL; | |
3019 | ||
2277c7cd | 3020 | /* Allow security module to validate address but need address len. */ |
1eec6958 | 3021 | af = sctp_get_af_specific(prim->ssp_addr.ss_family); |
2277c7cd RH |
3022 | if (!af) |
3023 | return -EINVAL; | |
3024 | ||
3025 | err = security_sctp_bind_connect(sk, SCTP_PRIMARY_ADDR, | |
1eec6958 | 3026 | (struct sockaddr *)&prim->ssp_addr, |
2277c7cd RH |
3027 | af->sockaddr_len); |
3028 | if (err) | |
3029 | return err; | |
3030 | ||
1eec6958 | 3031 | trans = sctp_addr_id2transport(sk, &prim->ssp_addr, prim->ssp_assoc_id); |
1da177e4 LT |
3032 | if (!trans) |
3033 | return -EINVAL; | |
3034 | ||
3035 | sctp_assoc_set_primary(trans->asoc, trans); | |
3036 | ||
3037 | return 0; | |
3038 | } | |
3039 | ||
3040 | /* | |
3041 | * 7.1.5 SCTP_NODELAY | |
3042 | * | |
3043 | * Turn on/off any Nagle-like algorithm. This means that packets are | |
3044 | * generally sent as soon as possible and no unnecessary delays are | |
3045 | * introduced, at the cost of more packets in the network. Expects an | |
3046 | * integer boolean flag. | |
3047 | */ | |
f87ddbc0 | 3048 | static int sctp_setsockopt_nodelay(struct sock *sk, int *val, |
b7058842 | 3049 | unsigned int optlen) |
1da177e4 | 3050 | { |
1da177e4 LT |
3051 | if (optlen < sizeof(int)) |
3052 | return -EINVAL; | |
f87ddbc0 | 3053 | sctp_sk(sk)->nodelay = (*val == 0) ? 0 : 1; |
1da177e4 LT |
3054 | return 0; |
3055 | } | |
3056 | ||
3057 | /* | |
3058 | * | |
3059 | * 7.1.1 SCTP_RTOINFO | |
3060 | * | |
3061 | * The protocol parameters used to initialize and bound retransmission | |
3062 | * timeout (RTO) are tunable. sctp_rtoinfo structure is used to access | |
3063 | * and modify these parameters. | |
3064 | * All parameters are time values, in milliseconds. A value of 0, when | |
3065 | * modifying the parameters, indicates that the current value should not | |
3066 | * be changed. | |
3067 | * | |
3068 | */ | |
af5ae60e CH |
3069 | static int sctp_setsockopt_rtoinfo(struct sock *sk, |
3070 | struct sctp_rtoinfo *rtoinfo, | |
3071 | unsigned int optlen) | |
b7058842 | 3072 | { |
1da177e4 | 3073 | struct sctp_association *asoc; |
85f935d4 | 3074 | unsigned long rto_min, rto_max; |
3075 | struct sctp_sock *sp = sctp_sk(sk); | |
1da177e4 LT |
3076 | |
3077 | if (optlen != sizeof (struct sctp_rtoinfo)) | |
3078 | return -EINVAL; | |
3079 | ||
af5ae60e | 3080 | asoc = sctp_id2assoc(sk, rtoinfo->srto_assoc_id); |
1da177e4 LT |
3081 | |
3082 | /* Set the values to the specific association */ | |
af5ae60e | 3083 | if (!asoc && rtoinfo->srto_assoc_id != SCTP_FUTURE_ASSOC && |
7adb5ed5 | 3084 | sctp_style(sk, UDP)) |
1da177e4 LT |
3085 | return -EINVAL; |
3086 | ||
af5ae60e CH |
3087 | rto_max = rtoinfo->srto_max; |
3088 | rto_min = rtoinfo->srto_min; | |
85f935d4 | 3089 | |
3090 | if (rto_max) | |
3091 | rto_max = asoc ? msecs_to_jiffies(rto_max) : rto_max; | |
3092 | else | |
3093 | rto_max = asoc ? asoc->rto_max : sp->rtoinfo.srto_max; | |
3094 | ||
3095 | if (rto_min) | |
3096 | rto_min = asoc ? msecs_to_jiffies(rto_min) : rto_min; | |
3097 | else | |
3098 | rto_min = asoc ? asoc->rto_min : sp->rtoinfo.srto_min; | |
3099 | ||
3100 | if (rto_min > rto_max) | |
3101 | return -EINVAL; | |
3102 | ||
1da177e4 | 3103 | if (asoc) { |
af5ae60e | 3104 | if (rtoinfo->srto_initial != 0) |
d808ad9a | 3105 | asoc->rto_initial = |
af5ae60e | 3106 | msecs_to_jiffies(rtoinfo->srto_initial); |
85f935d4 | 3107 | asoc->rto_max = rto_max; |
3108 | asoc->rto_min = rto_min; | |
1da177e4 LT |
3109 | } else { |
3110 | /* If there is no association or the association-id = 0 | |
3111 | * set the values to the endpoint. | |
3112 | */ | |
af5ae60e CH |
3113 | if (rtoinfo->srto_initial != 0) |
3114 | sp->rtoinfo.srto_initial = rtoinfo->srto_initial; | |
85f935d4 | 3115 | sp->rtoinfo.srto_max = rto_max; |
3116 | sp->rtoinfo.srto_min = rto_min; | |
1da177e4 LT |
3117 | } |
3118 | ||
3119 | return 0; | |
3120 | } | |
3121 | ||
3122 | /* | |
3123 | * | |
3124 | * 7.1.2 SCTP_ASSOCINFO | |
3125 | * | |
59c51591 | 3126 | * This option is used to tune the maximum retransmission attempts |
1da177e4 LT |
3127 | * of the association. |
3128 | * Returns an error if the new association retransmission value is | |
3129 | * greater than the sum of the retransmission value of the peer. | |
3130 | * See [SCTP] for more information. | |
3131 | * | |
3132 | */ | |
5b864c8d CH |
3133 | static int sctp_setsockopt_associnfo(struct sock *sk, |
3134 | struct sctp_assocparams *assocparams, | |
3135 | unsigned int optlen) | |
1da177e4 LT |
3136 | { |
3137 | ||
1da177e4 LT |
3138 | struct sctp_association *asoc; |
3139 | ||
3140 | if (optlen != sizeof(struct sctp_assocparams)) | |
3141 | return -EINVAL; | |
1da177e4 | 3142 | |
5b864c8d | 3143 | asoc = sctp_id2assoc(sk, assocparams->sasoc_assoc_id); |
1da177e4 | 3144 | |
5b864c8d | 3145 | if (!asoc && assocparams->sasoc_assoc_id != SCTP_FUTURE_ASSOC && |
8889394d | 3146 | sctp_style(sk, UDP)) |
1da177e4 LT |
3147 | return -EINVAL; |
3148 | ||
3149 | /* Set the values to the specific association */ | |
3150 | if (asoc) { | |
5b864c8d | 3151 | if (assocparams->sasoc_asocmaxrxt != 0) { |
402d68c4 VY |
3152 | __u32 path_sum = 0; |
3153 | int paths = 0; | |
402d68c4 VY |
3154 | struct sctp_transport *peer_addr; |
3155 | ||
9dbc15f0 RD |
3156 | list_for_each_entry(peer_addr, &asoc->peer.transport_addr_list, |
3157 | transports) { | |
402d68c4 VY |
3158 | path_sum += peer_addr->pathmaxrxt; |
3159 | paths++; | |
3160 | } | |
3161 | ||
025dfdaf | 3162 | /* Only validate asocmaxrxt if we have more than |
402d68c4 VY |
3163 | * one path/transport. We do this because path |
3164 | * retransmissions are only counted when we have more | |
3165 | * then one path. | |
3166 | */ | |
3167 | if (paths > 1 && | |
5b864c8d | 3168 | assocparams->sasoc_asocmaxrxt > path_sum) |
402d68c4 VY |
3169 | return -EINVAL; |
3170 | ||
5b864c8d | 3171 | asoc->max_retrans = assocparams->sasoc_asocmaxrxt; |
402d68c4 VY |
3172 | } |
3173 | ||
5b864c8d CH |
3174 | if (assocparams->sasoc_cookie_life != 0) |
3175 | asoc->cookie_life = | |
3176 | ms_to_ktime(assocparams->sasoc_cookie_life); | |
1da177e4 LT |
3177 | } else { |
3178 | /* Set the values to the endpoint */ | |
3179 | struct sctp_sock *sp = sctp_sk(sk); | |
3180 | ||
5b864c8d | 3181 | if (assocparams->sasoc_asocmaxrxt != 0) |
1da177e4 | 3182 | sp->assocparams.sasoc_asocmaxrxt = |
5b864c8d CH |
3183 | assocparams->sasoc_asocmaxrxt; |
3184 | if (assocparams->sasoc_cookie_life != 0) | |
1da177e4 | 3185 | sp->assocparams.sasoc_cookie_life = |
5b864c8d | 3186 | assocparams->sasoc_cookie_life; |
1da177e4 LT |
3187 | } |
3188 | return 0; | |
3189 | } | |
3190 | ||
3191 | /* | |
3192 | * 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR) | |
3193 | * | |
3194 | * This socket option is a boolean flag which turns on or off mapped V4 | |
3195 | * addresses. If this option is turned on and the socket is type | |
3196 | * PF_INET6, then IPv4 addresses will be mapped to V6 representation. | |
3197 | * If this option is turned off, then no mapping will be done of V4 | |
3198 | * addresses and a user will receive both PF_INET6 and PF_INET type | |
3199 | * addresses on the socket. | |
3200 | */ | |
ffc08f08 CH |
3201 | static int sctp_setsockopt_mappedv4(struct sock *sk, int *val, |
3202 | unsigned int optlen) | |
1da177e4 | 3203 | { |
1da177e4 LT |
3204 | struct sctp_sock *sp = sctp_sk(sk); |
3205 | ||
3206 | if (optlen < sizeof(int)) | |
3207 | return -EINVAL; | |
ffc08f08 | 3208 | if (*val) |
1da177e4 LT |
3209 | sp->v4mapped = 1; |
3210 | else | |
3211 | sp->v4mapped = 0; | |
3212 | ||
3213 | return 0; | |
3214 | } | |
3215 | ||
3216 | /* | |
e89c2095 WY |
3217 | * 8.1.16. Get or Set the Maximum Fragmentation Size (SCTP_MAXSEG) |
3218 | * This option will get or set the maximum size to put in any outgoing | |
3219 | * SCTP DATA chunk. If a message is larger than this size it will be | |
1da177e4 LT |
3220 | * fragmented by SCTP into the specified size. Note that the underlying |
3221 | * SCTP implementation may fragment into smaller sized chunks when the | |
3222 | * PMTU of the underlying association is smaller than the value set by | |
e89c2095 WY |
3223 | * the user. The default value for this option is '0' which indicates |
3224 | * the user is NOT limiting fragmentation and only the PMTU will effect | |
3225 | * SCTP's choice of DATA chunk size. Note also that values set larger | |
3226 | * than the maximum size of an IP datagram will effectively let SCTP | |
3227 | * control fragmentation (i.e. the same as setting this option to 0). | |
3228 | * | |
3229 | * The following structure is used to access and modify this parameter: | |
3230 | * | |
3231 | * struct sctp_assoc_value { | |
3232 | * sctp_assoc_t assoc_id; | |
3233 | * uint32_t assoc_value; | |
3234 | * }; | |
3235 | * | |
3236 | * assoc_id: This parameter is ignored for one-to-one style sockets. | |
3237 | * For one-to-many style sockets this parameter indicates which | |
3238 | * association the user is performing an action upon. Note that if | |
3239 | * this field's value is zero then the endpoints default value is | |
3240 | * changed (effecting future associations only). | |
3241 | * assoc_value: This parameter specifies the maximum size in bytes. | |
1da177e4 | 3242 | */ |
dcd03575 CH |
3243 | static int sctp_setsockopt_maxseg(struct sock *sk, |
3244 | struct sctp_assoc_value *params, | |
3245 | unsigned int optlen) | |
1da177e4 | 3246 | { |
ecca8f88 | 3247 | struct sctp_sock *sp = sctp_sk(sk); |
1da177e4 | 3248 | struct sctp_association *asoc; |
dcd03575 | 3249 | sctp_assoc_t assoc_id; |
1da177e4 LT |
3250 | int val; |
3251 | ||
e89c2095 | 3252 | if (optlen == sizeof(int)) { |
94f65193 | 3253 | pr_warn_ratelimited(DEPRECATED |
f916ec96 | 3254 | "%s (pid %d) " |
94f65193 | 3255 | "Use of int in maxseg socket option.\n" |
f916ec96 NH |
3256 | "Use struct sctp_assoc_value instead\n", |
3257 | current->comm, task_pid_nr(current)); | |
dcd03575 CH |
3258 | assoc_id = SCTP_FUTURE_ASSOC; |
3259 | val = *(int *)params; | |
e89c2095 | 3260 | } else if (optlen == sizeof(struct sctp_assoc_value)) { |
dcd03575 CH |
3261 | assoc_id = params->assoc_id; |
3262 | val = params->assoc_value; | |
ecca8f88 | 3263 | } else { |
1da177e4 | 3264 | return -EINVAL; |
ecca8f88 | 3265 | } |
e89c2095 | 3266 | |
dcd03575 CH |
3267 | asoc = sctp_id2assoc(sk, assoc_id); |
3268 | if (!asoc && assoc_id != SCTP_FUTURE_ASSOC && | |
6fd769be XL |
3269 | sctp_style(sk, UDP)) |
3270 | return -EINVAL; | |
439ef030 | 3271 | |
ecca8f88 XL |
3272 | if (val) { |
3273 | int min_len, max_len; | |
439ef030 MRL |
3274 | __u16 datasize = asoc ? sctp_datachk_len(&asoc->stream) : |
3275 | sizeof(struct sctp_data_chunk); | |
1da177e4 | 3276 | |
afd0a800 | 3277 | min_len = sctp_min_frag_point(sp, datasize); |
439ef030 | 3278 | max_len = SCTP_MAX_CHUNK_LEN - datasize; |
e89c2095 | 3279 | |
ecca8f88 XL |
3280 | if (val < min_len || val > max_len) |
3281 | return -EINVAL; | |
3282 | } | |
3283 | ||
e89c2095 | 3284 | if (asoc) { |
f68b2e05 | 3285 | asoc->user_frag = val; |
2f5e3c9d | 3286 | sctp_assoc_update_frag_point(asoc); |
e89c2095 WY |
3287 | } else { |
3288 | sp->user_frag = val; | |
1da177e4 LT |
3289 | } |
3290 | ||
3291 | return 0; | |
3292 | } | |
3293 | ||
3294 | ||
3295 | /* | |
3296 | * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR) | |
3297 | * | |
3298 | * Requests that the peer mark the enclosed address as the association | |
3299 | * primary. The enclosed address must be one of the association's | |
3300 | * locally bound addresses. The following structure is used to make a | |
3301 | * set primary request: | |
3302 | */ | |
46a0ae9d CH |
3303 | static int sctp_setsockopt_peer_primary_addr(struct sock *sk, |
3304 | struct sctp_setpeerprim *prim, | |
b7058842 | 3305 | unsigned int optlen) |
1da177e4 LT |
3306 | { |
3307 | struct sctp_sock *sp; | |
1da177e4 | 3308 | struct sctp_association *asoc = NULL; |
1da177e4 | 3309 | struct sctp_chunk *chunk; |
40a01039 | 3310 | struct sctp_af *af; |
1da177e4 LT |
3311 | int err; |
3312 | ||
3313 | sp = sctp_sk(sk); | |
1da177e4 | 3314 | |
4e27428f | 3315 | if (!sp->ep->asconf_enable) |
1da177e4 LT |
3316 | return -EPERM; |
3317 | ||
3318 | if (optlen != sizeof(struct sctp_setpeerprim)) | |
3319 | return -EINVAL; | |
3320 | ||
46a0ae9d | 3321 | asoc = sctp_id2assoc(sk, prim->sspp_assoc_id); |
d808ad9a | 3322 | if (!asoc) |
1da177e4 LT |
3323 | return -EINVAL; |
3324 | ||
3325 | if (!asoc->peer.asconf_capable) | |
3326 | return -EPERM; | |
3327 | ||
3328 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_SET_PRIMARY) | |
3329 | return -EPERM; | |
3330 | ||
3331 | if (!sctp_state(asoc, ESTABLISHED)) | |
3332 | return -ENOTCONN; | |
3333 | ||
46a0ae9d | 3334 | af = sctp_get_af_specific(prim->sspp_addr.ss_family); |
40a01039 WY |
3335 | if (!af) |
3336 | return -EINVAL; | |
3337 | ||
46a0ae9d | 3338 | if (!af->addr_valid((union sctp_addr *)&prim->sspp_addr, sp, NULL)) |
40a01039 WY |
3339 | return -EADDRNOTAVAIL; |
3340 | ||
46a0ae9d | 3341 | if (!sctp_assoc_lookup_laddr(asoc, (union sctp_addr *)&prim->sspp_addr)) |
1da177e4 LT |
3342 | return -EADDRNOTAVAIL; |
3343 | ||
2277c7cd RH |
3344 | /* Allow security module to validate address. */ |
3345 | err = security_sctp_bind_connect(sk, SCTP_SET_PEER_PRIMARY_ADDR, | |
46a0ae9d | 3346 | (struct sockaddr *)&prim->sspp_addr, |
2277c7cd RH |
3347 | af->sockaddr_len); |
3348 | if (err) | |
3349 | return err; | |
3350 | ||
1da177e4 LT |
3351 | /* Create an ASCONF chunk with SET_PRIMARY parameter */ |
3352 | chunk = sctp_make_asconf_set_prim(asoc, | |
46a0ae9d | 3353 | (union sctp_addr *)&prim->sspp_addr); |
1da177e4 LT |
3354 | if (!chunk) |
3355 | return -ENOMEM; | |
3356 | ||
3357 | err = sctp_send_asconf(asoc, chunk); | |
3358 | ||
bb33381d | 3359 | pr_debug("%s: we set peer primary addr primitively\n", __func__); |
1da177e4 LT |
3360 | |
3361 | return err; | |
3362 | } | |
3363 | ||
07e5035c CH |
3364 | static int sctp_setsockopt_adaptation_layer(struct sock *sk, |
3365 | struct sctp_setadaptation *adapt, | |
b7058842 | 3366 | unsigned int optlen) |
1da177e4 | 3367 | { |
0f3fffd8 | 3368 | if (optlen != sizeof(struct sctp_setadaptation)) |
1da177e4 | 3369 | return -EINVAL; |
1da177e4 | 3370 | |
07e5035c | 3371 | sctp_sk(sk)->adaptation_ind = adapt->ssb_adaptation_ind; |
1da177e4 LT |
3372 | |
3373 | return 0; | |
3374 | } | |
3375 | ||
6ab792f5 ISJ |
3376 | /* |
3377 | * 7.1.29. Set or Get the default context (SCTP_CONTEXT) | |
3378 | * | |
3379 | * The context field in the sctp_sndrcvinfo structure is normally only | |
3380 | * used when a failed message is retrieved holding the value that was | |
3381 | * sent down on the actual send call. This option allows the setting of | |
3382 | * a default context on an association basis that will be received on | |
3383 | * reading messages from the peer. This is especially helpful in the | |
3384 | * one-2-many model for an application to keep some reference to an | |
3385 | * internal state machine that is processing messages on the | |
3386 | * association. Note that the setting of this value only effects | |
3387 | * received messages from the peer and does not effect the value that is | |
3388 | * saved with outbound messages. | |
3389 | */ | |
722eca9e CH |
3390 | static int sctp_setsockopt_context(struct sock *sk, |
3391 | struct sctp_assoc_value *params, | |
b7058842 | 3392 | unsigned int optlen) |
6ab792f5 | 3393 | { |
49b037ac | 3394 | struct sctp_sock *sp = sctp_sk(sk); |
6ab792f5 ISJ |
3395 | struct sctp_association *asoc; |
3396 | ||
3397 | if (optlen != sizeof(struct sctp_assoc_value)) | |
3398 | return -EINVAL; | |
6ab792f5 | 3399 | |
722eca9e CH |
3400 | asoc = sctp_id2assoc(sk, params->assoc_id); |
3401 | if (!asoc && params->assoc_id > SCTP_ALL_ASSOC && | |
49b037ac XL |
3402 | sctp_style(sk, UDP)) |
3403 | return -EINVAL; | |
6ab792f5 | 3404 | |
49b037ac | 3405 | if (asoc) { |
722eca9e | 3406 | asoc->default_rcv_context = params->assoc_value; |
49b037ac XL |
3407 | |
3408 | return 0; | |
6ab792f5 ISJ |
3409 | } |
3410 | ||
cface2cb | 3411 | if (sctp_style(sk, TCP)) |
722eca9e | 3412 | params->assoc_id = SCTP_FUTURE_ASSOC; |
cface2cb | 3413 | |
722eca9e CH |
3414 | if (params->assoc_id == SCTP_FUTURE_ASSOC || |
3415 | params->assoc_id == SCTP_ALL_ASSOC) | |
3416 | sp->default_rcv_context = params->assoc_value; | |
49b037ac | 3417 | |
722eca9e CH |
3418 | if (params->assoc_id == SCTP_CURRENT_ASSOC || |
3419 | params->assoc_id == SCTP_ALL_ASSOC) | |
49b037ac | 3420 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) |
722eca9e | 3421 | asoc->default_rcv_context = params->assoc_value; |
49b037ac | 3422 | |
6ab792f5 ISJ |
3423 | return 0; |
3424 | } | |
3425 | ||
b6e1331f VY |
3426 | /* |
3427 | * 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE) | |
3428 | * | |
3429 | * This options will at a minimum specify if the implementation is doing | |
3430 | * fragmented interleave. Fragmented interleave, for a one to many | |
3431 | * socket, is when subsequent calls to receive a message may return | |
3432 | * parts of messages from different associations. Some implementations | |
3433 | * may allow you to turn this value on or off. If so, when turned off, | |
3434 | * no fragment interleave will occur (which will cause a head of line | |
3435 | * blocking amongst multiple associations sharing the same one to many | |
3436 | * socket). When this option is turned on, then each receive call may | |
3437 | * come from a different association (thus the user must receive data | |
3438 | * with the extended calls (e.g. sctp_recvmsg) to keep track of which | |
3439 | * association each receive belongs to. | |
3440 | * | |
3441 | * This option takes a boolean value. A non-zero value indicates that | |
3442 | * fragmented interleave is on. A value of zero indicates that | |
3443 | * fragmented interleave is off. | |
3444 | * | |
3445 | * Note that it is important that an implementation that allows this | |
3446 | * option to be turned on, have it off by default. Otherwise an unaware | |
3447 | * application using the one to many model may become confused and act | |
3448 | * incorrectly. | |
3449 | */ | |
1031cea0 | 3450 | static int sctp_setsockopt_fragment_interleave(struct sock *sk, int *val, |
b7058842 | 3451 | unsigned int optlen) |
b6e1331f | 3452 | { |
b6e1331f VY |
3453 | if (optlen != sizeof(int)) |
3454 | return -EINVAL; | |
b6e1331f | 3455 | |
1031cea0 | 3456 | sctp_sk(sk)->frag_interleave = !!*val; |
772a5869 XL |
3457 | |
3458 | if (!sctp_sk(sk)->frag_interleave) | |
e55f4b8b | 3459 | sctp_sk(sk)->ep->intl_enable = 0; |
b6e1331f VY |
3460 | |
3461 | return 0; | |
3462 | } | |
3463 | ||
d49d91d7 | 3464 | /* |
8510b937 | 3465 | * 8.1.21. Set or Get the SCTP Partial Delivery Point |
d49d91d7 | 3466 | * (SCTP_PARTIAL_DELIVERY_POINT) |
8510b937 | 3467 | * |
d49d91d7 VY |
3468 | * This option will set or get the SCTP partial delivery point. This |
3469 | * point is the size of a message where the partial delivery API will be | |
3470 | * invoked to help free up rwnd space for the peer. Setting this to a | |
8510b937 | 3471 | * lower value will cause partial deliveries to happen more often. The |
d49d91d7 | 3472 | * calls argument is an integer that sets or gets the partial delivery |
8510b937 WY |
3473 | * point. Note also that the call will fail if the user attempts to set |
3474 | * this value larger than the socket receive buffer size. | |
3475 | * | |
3476 | * Note that any single message having a length smaller than or equal to | |
3477 | * the SCTP partial delivery point will be delivered in one single read | |
3478 | * call as long as the user provided buffer is large enough to hold the | |
3479 | * message. | |
d49d91d7 | 3480 | */ |
bb13d647 | 3481 | static int sctp_setsockopt_partial_delivery_point(struct sock *sk, u32 *val, |
b7058842 | 3482 | unsigned int optlen) |
d49d91d7 | 3483 | { |
d49d91d7 VY |
3484 | if (optlen != sizeof(u32)) |
3485 | return -EINVAL; | |
d49d91d7 | 3486 | |
8510b937 WY |
3487 | /* Note: We double the receive buffer from what the user sets |
3488 | * it to be, also initial rwnd is based on rcvbuf/2. | |
3489 | */ | |
bb13d647 | 3490 | if (*val > (sk->sk_rcvbuf >> 1)) |
8510b937 WY |
3491 | return -EINVAL; |
3492 | ||
bb13d647 | 3493 | sctp_sk(sk)->pd_point = *val; |
d49d91d7 VY |
3494 | |
3495 | return 0; /* is this the right error code? */ | |
3496 | } | |
3497 | ||
70331571 VY |
3498 | /* |
3499 | * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST) | |
3500 | * | |
3501 | * This option will allow a user to change the maximum burst of packets | |
3502 | * that can be emitted by this association. Note that the default value | |
3503 | * is 4, and some implementations may restrict this setting so that it | |
3504 | * can only be lowered. | |
3505 | * | |
3506 | * NOTE: This text doesn't seem right. Do this on a socket basis with | |
3507 | * future associations inheriting the socket value. | |
3508 | */ | |
3509 | static int sctp_setsockopt_maxburst(struct sock *sk, | |
f5bee0ad | 3510 | struct sctp_assoc_value *params, |
b7058842 | 3511 | unsigned int optlen) |
70331571 | 3512 | { |
e0651a0d | 3513 | struct sctp_sock *sp = sctp_sk(sk); |
219b99a9 | 3514 | struct sctp_association *asoc; |
f5bee0ad CH |
3515 | sctp_assoc_t assoc_id; |
3516 | u32 assoc_value; | |
70331571 | 3517 | |
219b99a9 | 3518 | if (optlen == sizeof(int)) { |
94f65193 | 3519 | pr_warn_ratelimited(DEPRECATED |
f916ec96 | 3520 | "%s (pid %d) " |
94f65193 | 3521 | "Use of int in max_burst socket option deprecated.\n" |
f916ec96 NH |
3522 | "Use struct sctp_assoc_value instead\n", |
3523 | current->comm, task_pid_nr(current)); | |
f5bee0ad CH |
3524 | assoc_id = SCTP_FUTURE_ASSOC; |
3525 | assoc_value = *((int *)params); | |
219b99a9 | 3526 | } else if (optlen == sizeof(struct sctp_assoc_value)) { |
f5bee0ad CH |
3527 | assoc_id = params->assoc_id; |
3528 | assoc_value = params->assoc_value; | |
219b99a9 | 3529 | } else |
70331571 VY |
3530 | return -EINVAL; |
3531 | ||
f5bee0ad CH |
3532 | asoc = sctp_id2assoc(sk, assoc_id); |
3533 | if (!asoc && assoc_id > SCTP_ALL_ASSOC && sctp_style(sk, UDP)) | |
e0651a0d | 3534 | return -EINVAL; |
219b99a9 | 3535 | |
e0651a0d | 3536 | if (asoc) { |
f5bee0ad | 3537 | asoc->max_burst = assoc_value; |
e0651a0d XL |
3538 | |
3539 | return 0; | |
3540 | } | |
3541 | ||
746bc215 | 3542 | if (sctp_style(sk, TCP)) |
f5bee0ad | 3543 | assoc_id = SCTP_FUTURE_ASSOC; |
746bc215 | 3544 | |
f5bee0ad CH |
3545 | if (assoc_id == SCTP_FUTURE_ASSOC || assoc_id == SCTP_ALL_ASSOC) |
3546 | sp->max_burst = assoc_value; | |
e0651a0d | 3547 | |
f5bee0ad | 3548 | if (assoc_id == SCTP_CURRENT_ASSOC || assoc_id == SCTP_ALL_ASSOC) |
e0651a0d | 3549 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) |
f5bee0ad | 3550 | asoc->max_burst = assoc_value; |
70331571 VY |
3551 | |
3552 | return 0; | |
3553 | } | |
3554 | ||
65b07e5d VY |
3555 | /* |
3556 | * 7.1.18. Add a chunk that must be authenticated (SCTP_AUTH_CHUNK) | |
3557 | * | |
3558 | * This set option adds a chunk type that the user is requesting to be | |
3559 | * received only in an authenticated way. Changes to the list of chunks | |
3560 | * will only effect future associations on the socket. | |
3561 | */ | |
3562 | static int sctp_setsockopt_auth_chunk(struct sock *sk, | |
88266d31 | 3563 | struct sctp_authchunk *val, |
b7058842 | 3564 | unsigned int optlen) |
65b07e5d | 3565 | { |
b14878cc | 3566 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d | 3567 | |
b14878cc | 3568 | if (!ep->auth_enable) |
5e739d17 VY |
3569 | return -EACCES; |
3570 | ||
65b07e5d VY |
3571 | if (optlen != sizeof(struct sctp_authchunk)) |
3572 | return -EINVAL; | |
65b07e5d | 3573 | |
88266d31 | 3574 | switch (val->sauth_chunk) { |
7fd71b1e JP |
3575 | case SCTP_CID_INIT: |
3576 | case SCTP_CID_INIT_ACK: | |
3577 | case SCTP_CID_SHUTDOWN_COMPLETE: | |
3578 | case SCTP_CID_AUTH: | |
3579 | return -EINVAL; | |
65b07e5d VY |
3580 | } |
3581 | ||
3582 | /* add this chunk id to the endpoint */ | |
88266d31 | 3583 | return sctp_auth_ep_add_chunkid(ep, val->sauth_chunk); |
65b07e5d VY |
3584 | } |
3585 | ||
3586 | /* | |
3587 | * 7.1.19. Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT) | |
3588 | * | |
3589 | * This option gets or sets the list of HMAC algorithms that the local | |
3590 | * endpoint requires the peer to use. | |
3591 | */ | |
3592 | static int sctp_setsockopt_hmac_ident(struct sock *sk, | |
3564ef44 | 3593 | struct sctp_hmacalgo *hmacs, |
b7058842 | 3594 | unsigned int optlen) |
65b07e5d | 3595 | { |
b14878cc | 3596 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
d9724055 | 3597 | u32 idents; |
65b07e5d | 3598 | |
b14878cc | 3599 | if (!ep->auth_enable) |
5e739d17 VY |
3600 | return -EACCES; |
3601 | ||
65b07e5d VY |
3602 | if (optlen < sizeof(struct sctp_hmacalgo)) |
3603 | return -EINVAL; | |
5960cefa MRL |
3604 | optlen = min_t(unsigned int, optlen, sizeof(struct sctp_hmacalgo) + |
3605 | SCTP_AUTH_NUM_HMACS * sizeof(u16)); | |
65b07e5d | 3606 | |
d9724055 VY |
3607 | idents = hmacs->shmac_num_idents; |
3608 | if (idents == 0 || idents > SCTP_AUTH_NUM_HMACS || | |
3564ef44 CH |
3609 | (idents * sizeof(u16)) > (optlen - sizeof(struct sctp_hmacalgo))) |
3610 | return -EINVAL; | |
65b07e5d | 3611 | |
3564ef44 | 3612 | return sctp_auth_ep_set_hmacs(ep, hmacs); |
65b07e5d VY |
3613 | } |
3614 | ||
3615 | /* | |
3616 | * 7.1.20. Set a shared key (SCTP_AUTH_KEY) | |
3617 | * | |
3618 | * This option will set a shared secret key which is used to build an | |
3619 | * association shared key. | |
3620 | */ | |
3621 | static int sctp_setsockopt_auth_key(struct sock *sk, | |
534d13d0 | 3622 | struct sctp_authkey *authkey, |
b7058842 | 3623 | unsigned int optlen) |
65b07e5d | 3624 | { |
b14878cc | 3625 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d | 3626 | struct sctp_association *asoc; |
7fb3be13 | 3627 | int ret = -EINVAL; |
65b07e5d VY |
3628 | |
3629 | if (optlen <= sizeof(struct sctp_authkey)) | |
3630 | return -EINVAL; | |
5960cefa MRL |
3631 | /* authkey->sca_keylength is u16, so optlen can't be bigger than |
3632 | * this. | |
3633 | */ | |
7fb3be13 | 3634 | optlen = min_t(unsigned int, optlen, USHRT_MAX + sizeof(*authkey)); |
65b07e5d | 3635 | |
7fb3be13 | 3636 | if (authkey->sca_keylength > optlen - sizeof(*authkey)) |
30c2235c | 3637 | goto out; |
30c2235c | 3638 | |
65b07e5d | 3639 | asoc = sctp_id2assoc(sk, authkey->sca_assoc_id); |
7fb3be13 XL |
3640 | if (!asoc && authkey->sca_assoc_id > SCTP_ALL_ASSOC && |
3641 | sctp_style(sk, UDP)) | |
65b07e5d | 3642 | goto out; |
7fb3be13 XL |
3643 | |
3644 | if (asoc) { | |
3645 | ret = sctp_auth_set_key(ep, asoc, authkey); | |
3646 | goto out; | |
3647 | } | |
3648 | ||
0685d6b7 XL |
3649 | if (sctp_style(sk, TCP)) |
3650 | authkey->sca_assoc_id = SCTP_FUTURE_ASSOC; | |
3651 | ||
7fb3be13 XL |
3652 | if (authkey->sca_assoc_id == SCTP_FUTURE_ASSOC || |
3653 | authkey->sca_assoc_id == SCTP_ALL_ASSOC) { | |
3654 | ret = sctp_auth_set_key(ep, asoc, authkey); | |
3655 | if (ret) | |
3656 | goto out; | |
3657 | } | |
3658 | ||
3659 | ret = 0; | |
3660 | ||
3661 | if (authkey->sca_assoc_id == SCTP_CURRENT_ASSOC || | |
3662 | authkey->sca_assoc_id == SCTP_ALL_ASSOC) { | |
3663 | list_for_each_entry(asoc, &ep->asocs, asocs) { | |
3664 | int res = sctp_auth_set_key(ep, asoc, authkey); | |
3665 | ||
3666 | if (res && !ret) | |
3667 | ret = res; | |
3668 | } | |
65b07e5d VY |
3669 | } |
3670 | ||
65b07e5d | 3671 | out: |
89fae01e | 3672 | memzero_explicit(authkey, optlen); |
65b07e5d VY |
3673 | return ret; |
3674 | } | |
3675 | ||
3676 | /* | |
3677 | * 7.1.21. Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY) | |
3678 | * | |
3679 | * This option will get or set the active shared key to be used to build | |
3680 | * the association shared key. | |
3681 | */ | |
3682 | static int sctp_setsockopt_active_key(struct sock *sk, | |
dcab0a7a | 3683 | struct sctp_authkeyid *val, |
b7058842 | 3684 | unsigned int optlen) |
65b07e5d | 3685 | { |
b14878cc | 3686 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d | 3687 | struct sctp_association *asoc; |
bf9fb6ad | 3688 | int ret = 0; |
65b07e5d VY |
3689 | |
3690 | if (optlen != sizeof(struct sctp_authkeyid)) | |
3691 | return -EINVAL; | |
65b07e5d | 3692 | |
dcab0a7a CH |
3693 | asoc = sctp_id2assoc(sk, val->scact_assoc_id); |
3694 | if (!asoc && val->scact_assoc_id > SCTP_ALL_ASSOC && | |
bf9fb6ad | 3695 | sctp_style(sk, UDP)) |
65b07e5d VY |
3696 | return -EINVAL; |
3697 | ||
bf9fb6ad | 3698 | if (asoc) |
dcab0a7a | 3699 | return sctp_auth_set_active_key(ep, asoc, val->scact_keynumber); |
bf9fb6ad | 3700 | |
06b39e85 | 3701 | if (sctp_style(sk, TCP)) |
dcab0a7a | 3702 | val->scact_assoc_id = SCTP_FUTURE_ASSOC; |
06b39e85 | 3703 | |
dcab0a7a CH |
3704 | if (val->scact_assoc_id == SCTP_FUTURE_ASSOC || |
3705 | val->scact_assoc_id == SCTP_ALL_ASSOC) { | |
3706 | ret = sctp_auth_set_active_key(ep, asoc, val->scact_keynumber); | |
bf9fb6ad XL |
3707 | if (ret) |
3708 | return ret; | |
3709 | } | |
3710 | ||
dcab0a7a CH |
3711 | if (val->scact_assoc_id == SCTP_CURRENT_ASSOC || |
3712 | val->scact_assoc_id == SCTP_ALL_ASSOC) { | |
bf9fb6ad XL |
3713 | list_for_each_entry(asoc, &ep->asocs, asocs) { |
3714 | int res = sctp_auth_set_active_key(ep, asoc, | |
dcab0a7a | 3715 | val->scact_keynumber); |
bf9fb6ad XL |
3716 | |
3717 | if (res && !ret) | |
3718 | ret = res; | |
3719 | } | |
3720 | } | |
3721 | ||
3722 | return ret; | |
65b07e5d VY |
3723 | } |
3724 | ||
3725 | /* | |
3726 | * 7.1.22. Delete a shared key (SCTP_AUTH_DELETE_KEY) | |
3727 | * | |
3728 | * This set option will delete a shared secret key from use. | |
3729 | */ | |
3730 | static int sctp_setsockopt_del_key(struct sock *sk, | |
97dc9f2e | 3731 | struct sctp_authkeyid *val, |
b7058842 | 3732 | unsigned int optlen) |
65b07e5d | 3733 | { |
b14878cc | 3734 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
65b07e5d | 3735 | struct sctp_association *asoc; |
3adcc300 | 3736 | int ret = 0; |
65b07e5d VY |
3737 | |
3738 | if (optlen != sizeof(struct sctp_authkeyid)) | |
3739 | return -EINVAL; | |
65b07e5d | 3740 | |
97dc9f2e CH |
3741 | asoc = sctp_id2assoc(sk, val->scact_assoc_id); |
3742 | if (!asoc && val->scact_assoc_id > SCTP_ALL_ASSOC && | |
3adcc300 | 3743 | sctp_style(sk, UDP)) |
65b07e5d VY |
3744 | return -EINVAL; |
3745 | ||
3adcc300 | 3746 | if (asoc) |
97dc9f2e | 3747 | return sctp_auth_del_key_id(ep, asoc, val->scact_keynumber); |
65b07e5d | 3748 | |
220675eb | 3749 | if (sctp_style(sk, TCP)) |
97dc9f2e | 3750 | val->scact_assoc_id = SCTP_FUTURE_ASSOC; |
220675eb | 3751 | |
97dc9f2e CH |
3752 | if (val->scact_assoc_id == SCTP_FUTURE_ASSOC || |
3753 | val->scact_assoc_id == SCTP_ALL_ASSOC) { | |
3754 | ret = sctp_auth_del_key_id(ep, asoc, val->scact_keynumber); | |
3adcc300 XL |
3755 | if (ret) |
3756 | return ret; | |
3757 | } | |
3758 | ||
97dc9f2e CH |
3759 | if (val->scact_assoc_id == SCTP_CURRENT_ASSOC || |
3760 | val->scact_assoc_id == SCTP_ALL_ASSOC) { | |
3adcc300 XL |
3761 | list_for_each_entry(asoc, &ep->asocs, asocs) { |
3762 | int res = sctp_auth_del_key_id(ep, asoc, | |
97dc9f2e | 3763 | val->scact_keynumber); |
3adcc300 XL |
3764 | |
3765 | if (res && !ret) | |
3766 | ret = res; | |
3767 | } | |
3768 | } | |
3769 | ||
3770 | return ret; | |
65b07e5d VY |
3771 | } |
3772 | ||
601590ec XL |
3773 | /* |
3774 | * 8.3.4 Deactivate a Shared Key (SCTP_AUTH_DEACTIVATE_KEY) | |
3775 | * | |
3776 | * This set option will deactivate a shared secret key. | |
3777 | */ | |
76b3d0c4 CH |
3778 | static int sctp_setsockopt_deactivate_key(struct sock *sk, |
3779 | struct sctp_authkeyid *val, | |
601590ec XL |
3780 | unsigned int optlen) |
3781 | { | |
3782 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; | |
601590ec | 3783 | struct sctp_association *asoc; |
2af66ff3 | 3784 | int ret = 0; |
601590ec | 3785 | |
601590ec XL |
3786 | if (optlen != sizeof(struct sctp_authkeyid)) |
3787 | return -EINVAL; | |
601590ec | 3788 | |
76b3d0c4 CH |
3789 | asoc = sctp_id2assoc(sk, val->scact_assoc_id); |
3790 | if (!asoc && val->scact_assoc_id > SCTP_ALL_ASSOC && | |
2af66ff3 | 3791 | sctp_style(sk, UDP)) |
601590ec XL |
3792 | return -EINVAL; |
3793 | ||
2af66ff3 | 3794 | if (asoc) |
76b3d0c4 | 3795 | return sctp_auth_deact_key_id(ep, asoc, val->scact_keynumber); |
2af66ff3 | 3796 | |
200f3a3b | 3797 | if (sctp_style(sk, TCP)) |
76b3d0c4 | 3798 | val->scact_assoc_id = SCTP_FUTURE_ASSOC; |
200f3a3b | 3799 | |
76b3d0c4 CH |
3800 | if (val->scact_assoc_id == SCTP_FUTURE_ASSOC || |
3801 | val->scact_assoc_id == SCTP_ALL_ASSOC) { | |
3802 | ret = sctp_auth_deact_key_id(ep, asoc, val->scact_keynumber); | |
2af66ff3 XL |
3803 | if (ret) |
3804 | return ret; | |
3805 | } | |
3806 | ||
76b3d0c4 CH |
3807 | if (val->scact_assoc_id == SCTP_CURRENT_ASSOC || |
3808 | val->scact_assoc_id == SCTP_ALL_ASSOC) { | |
2af66ff3 XL |
3809 | list_for_each_entry(asoc, &ep->asocs, asocs) { |
3810 | int res = sctp_auth_deact_key_id(ep, asoc, | |
76b3d0c4 | 3811 | val->scact_keynumber); |
2af66ff3 XL |
3812 | |
3813 | if (res && !ret) | |
3814 | ret = res; | |
3815 | } | |
3816 | } | |
3817 | ||
3818 | return ret; | |
601590ec XL |
3819 | } |
3820 | ||
7dc04d71 MH |
3821 | /* |
3822 | * 8.1.23 SCTP_AUTO_ASCONF | |
3823 | * | |
3824 | * This option will enable or disable the use of the automatic generation of | |
3825 | * ASCONF chunks to add and delete addresses to an existing association. Note | |
3826 | * that this option has two caveats namely: a) it only affects sockets that | |
3827 | * are bound to all addresses available to the SCTP stack, and b) the system | |
3828 | * administrator may have an overriding control that turns the ASCONF feature | |
3829 | * off no matter what setting the socket option may have. | |
3830 | * This option expects an integer boolean flag, where a non-zero value turns on | |
3831 | * the option, and a zero value turns off the option. | |
3832 | * Note. In this implementation, socket operation overrides default parameter | |
3833 | * being set by sysctl as well as FreeBSD implementation | |
3834 | */ | |
c9abc2c1 | 3835 | static int sctp_setsockopt_auto_asconf(struct sock *sk, int *val, |
7dc04d71 MH |
3836 | unsigned int optlen) |
3837 | { | |
7dc04d71 MH |
3838 | struct sctp_sock *sp = sctp_sk(sk); |
3839 | ||
3840 | if (optlen < sizeof(int)) | |
3841 | return -EINVAL; | |
c9abc2c1 | 3842 | if (!sctp_is_ep_boundall(sk) && *val) |
7dc04d71 | 3843 | return -EINVAL; |
c9abc2c1 | 3844 | if ((*val && sp->do_auto_asconf) || (!*val && !sp->do_auto_asconf)) |
7dc04d71 MH |
3845 | return 0; |
3846 | ||
2d45a02d | 3847 | spin_lock_bh(&sock_net(sk)->sctp.addr_wq_lock); |
c9abc2c1 | 3848 | if (*val == 0 && sp->do_auto_asconf) { |
7dc04d71 MH |
3849 | list_del(&sp->auto_asconf_list); |
3850 | sp->do_auto_asconf = 0; | |
c9abc2c1 | 3851 | } else if (*val && !sp->do_auto_asconf) { |
7dc04d71 | 3852 | list_add_tail(&sp->auto_asconf_list, |
4db67e80 | 3853 | &sock_net(sk)->sctp.auto_asconf_splist); |
7dc04d71 MH |
3854 | sp->do_auto_asconf = 1; |
3855 | } | |
2d45a02d | 3856 | spin_unlock_bh(&sock_net(sk)->sctp.addr_wq_lock); |
7dc04d71 MH |
3857 | return 0; |
3858 | } | |
3859 | ||
5aa93bcf NH |
3860 | /* |
3861 | * SCTP_PEER_ADDR_THLDS | |
3862 | * | |
3863 | * This option allows us to alter the partially failed threshold for one or all | |
3864 | * transports in an association. See Section 6.1 of: | |
3865 | * http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txt | |
3866 | */ | |
3867 | static int sctp_setsockopt_paddr_thresholds(struct sock *sk, | |
b0ac3bb8 | 3868 | struct sctp_paddrthlds_v2 *val, |
d467ac0a | 3869 | unsigned int optlen, bool v2) |
5aa93bcf | 3870 | { |
5aa93bcf NH |
3871 | struct sctp_transport *trans; |
3872 | struct sctp_association *asoc; | |
d467ac0a | 3873 | int len; |
5aa93bcf | 3874 | |
b0ac3bb8 | 3875 | len = v2 ? sizeof(*val) : sizeof(struct sctp_paddrthlds); |
d467ac0a | 3876 | if (optlen < len) |
5aa93bcf | 3877 | return -EINVAL; |
5aa93bcf | 3878 | |
b0ac3bb8 | 3879 | if (v2 && val->spt_pathpfthld > val->spt_pathcpthld) |
d467ac0a XL |
3880 | return -EINVAL; |
3881 | ||
b0ac3bb8 CH |
3882 | if (!sctp_is_any(sk, (const union sctp_addr *)&val->spt_address)) { |
3883 | trans = sctp_addr_id2transport(sk, &val->spt_address, | |
3884 | val->spt_assoc_id); | |
8add543e | 3885 | if (!trans) |
5aa93bcf | 3886 | return -ENOENT; |
8add543e | 3887 | |
b0ac3bb8 CH |
3888 | if (val->spt_pathmaxrxt) |
3889 | trans->pathmaxrxt = val->spt_pathmaxrxt; | |
d467ac0a | 3890 | if (v2) |
b0ac3bb8 CH |
3891 | trans->ps_retrans = val->spt_pathcpthld; |
3892 | trans->pf_retrans = val->spt_pathpfthld; | |
8add543e XL |
3893 | |
3894 | return 0; | |
3895 | } | |
3896 | ||
b0ac3bb8 CH |
3897 | asoc = sctp_id2assoc(sk, val->spt_assoc_id); |
3898 | if (!asoc && val->spt_assoc_id != SCTP_FUTURE_ASSOC && | |
8add543e XL |
3899 | sctp_style(sk, UDP)) |
3900 | return -EINVAL; | |
3901 | ||
3902 | if (asoc) { | |
5aa93bcf NH |
3903 | list_for_each_entry(trans, &asoc->peer.transport_addr_list, |
3904 | transports) { | |
b0ac3bb8 CH |
3905 | if (val->spt_pathmaxrxt) |
3906 | trans->pathmaxrxt = val->spt_pathmaxrxt; | |
d467ac0a | 3907 | if (v2) |
b0ac3bb8 CH |
3908 | trans->ps_retrans = val->spt_pathcpthld; |
3909 | trans->pf_retrans = val->spt_pathpfthld; | |
5aa93bcf NH |
3910 | } |
3911 | ||
b0ac3bb8 CH |
3912 | if (val->spt_pathmaxrxt) |
3913 | asoc->pathmaxrxt = val->spt_pathmaxrxt; | |
d467ac0a | 3914 | if (v2) |
b0ac3bb8 CH |
3915 | asoc->ps_retrans = val->spt_pathcpthld; |
3916 | asoc->pf_retrans = val->spt_pathpfthld; | |
5aa93bcf | 3917 | } else { |
8add543e | 3918 | struct sctp_sock *sp = sctp_sk(sk); |
5aa93bcf | 3919 | |
b0ac3bb8 CH |
3920 | if (val->spt_pathmaxrxt) |
3921 | sp->pathmaxrxt = val->spt_pathmaxrxt; | |
d467ac0a | 3922 | if (v2) |
b0ac3bb8 CH |
3923 | sp->ps_retrans = val->spt_pathcpthld; |
3924 | sp->pf_retrans = val->spt_pathpfthld; | |
5aa93bcf NH |
3925 | } |
3926 | ||
3927 | return 0; | |
3928 | } | |
3929 | ||
a98af7c8 | 3930 | static int sctp_setsockopt_recvrcvinfo(struct sock *sk, int *val, |
0d3a421d GOV |
3931 | unsigned int optlen) |
3932 | { | |
0d3a421d GOV |
3933 | if (optlen < sizeof(int)) |
3934 | return -EINVAL; | |
0d3a421d | 3935 | |
a98af7c8 | 3936 | sctp_sk(sk)->recvrcvinfo = (*val == 0) ? 0 : 1; |
0d3a421d GOV |
3937 | |
3938 | return 0; | |
3939 | } | |
3940 | ||
cfa6fde2 | 3941 | static int sctp_setsockopt_recvnxtinfo(struct sock *sk, int *val, |
2347c80f GOV |
3942 | unsigned int optlen) |
3943 | { | |
2347c80f GOV |
3944 | if (optlen < sizeof(int)) |
3945 | return -EINVAL; | |
2347c80f | 3946 | |
cfa6fde2 | 3947 | sctp_sk(sk)->recvnxtinfo = (*val == 0) ? 0 : 1; |
2347c80f GOV |
3948 | |
3949 | return 0; | |
3950 | } | |
3951 | ||
28aa4c26 | 3952 | static int sctp_setsockopt_pr_supported(struct sock *sk, |
4a97fa4f | 3953 | struct sctp_assoc_value *params, |
28aa4c26 XL |
3954 | unsigned int optlen) |
3955 | { | |
fb195605 | 3956 | struct sctp_association *asoc; |
28aa4c26 | 3957 | |
4a97fa4f | 3958 | if (optlen != sizeof(*params)) |
cc3ccf26 | 3959 | return -EINVAL; |
28aa4c26 | 3960 | |
4a97fa4f CH |
3961 | asoc = sctp_id2assoc(sk, params->assoc_id); |
3962 | if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC && | |
fb195605 XL |
3963 | sctp_style(sk, UDP)) |
3964 | return -EINVAL; | |
3965 | ||
4a97fa4f | 3966 | sctp_sk(sk)->ep->prsctp_enable = !!params->assoc_value; |
28aa4c26 | 3967 | |
cc3ccf26 | 3968 | return 0; |
28aa4c26 XL |
3969 | } |
3970 | ||
f959fb44 | 3971 | static int sctp_setsockopt_default_prinfo(struct sock *sk, |
ac37435b | 3972 | struct sctp_default_prinfo *info, |
f959fb44 XL |
3973 | unsigned int optlen) |
3974 | { | |
3a583059 | 3975 | struct sctp_sock *sp = sctp_sk(sk); |
f959fb44 XL |
3976 | struct sctp_association *asoc; |
3977 | int retval = -EINVAL; | |
3978 | ||
ac37435b | 3979 | if (optlen != sizeof(*info)) |
f959fb44 | 3980 | goto out; |
f959fb44 | 3981 | |
ac37435b | 3982 | if (info->pr_policy & ~SCTP_PR_SCTP_MASK) |
f959fb44 XL |
3983 | goto out; |
3984 | ||
ac37435b CH |
3985 | if (info->pr_policy == SCTP_PR_SCTP_NONE) |
3986 | info->pr_value = 0; | |
f959fb44 | 3987 | |
ac37435b CH |
3988 | asoc = sctp_id2assoc(sk, info->pr_assoc_id); |
3989 | if (!asoc && info->pr_assoc_id > SCTP_ALL_ASSOC && | |
3a583059 XL |
3990 | sctp_style(sk, UDP)) |
3991 | goto out; | |
3992 | ||
3993 | retval = 0; | |
3994 | ||
f959fb44 | 3995 | if (asoc) { |
ac37435b CH |
3996 | SCTP_PR_SET_POLICY(asoc->default_flags, info->pr_policy); |
3997 | asoc->default_timetolive = info->pr_value; | |
3a583059 XL |
3998 | goto out; |
3999 | } | |
f959fb44 | 4000 | |
cbb45c6c | 4001 | if (sctp_style(sk, TCP)) |
ac37435b | 4002 | info->pr_assoc_id = SCTP_FUTURE_ASSOC; |
cbb45c6c | 4003 | |
ac37435b CH |
4004 | if (info->pr_assoc_id == SCTP_FUTURE_ASSOC || |
4005 | info->pr_assoc_id == SCTP_ALL_ASSOC) { | |
4006 | SCTP_PR_SET_POLICY(sp->default_flags, info->pr_policy); | |
4007 | sp->default_timetolive = info->pr_value; | |
f959fb44 XL |
4008 | } |
4009 | ||
ac37435b CH |
4010 | if (info->pr_assoc_id == SCTP_CURRENT_ASSOC || |
4011 | info->pr_assoc_id == SCTP_ALL_ASSOC) { | |
3a583059 | 4012 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) { |
ac37435b CH |
4013 | SCTP_PR_SET_POLICY(asoc->default_flags, |
4014 | info->pr_policy); | |
4015 | asoc->default_timetolive = info->pr_value; | |
3a583059 XL |
4016 | } |
4017 | } | |
f959fb44 XL |
4018 | |
4019 | out: | |
4020 | return retval; | |
4021 | } | |
4022 | ||
c0d8bab6 | 4023 | static int sctp_setsockopt_reconfig_supported(struct sock *sk, |
3f49f720 | 4024 | struct sctp_assoc_value *params, |
c0d8bab6 XL |
4025 | unsigned int optlen) |
4026 | { | |
c0d8bab6 XL |
4027 | struct sctp_association *asoc; |
4028 | int retval = -EINVAL; | |
4029 | ||
3f49f720 | 4030 | if (optlen != sizeof(*params)) |
c0d8bab6 | 4031 | goto out; |
c0d8bab6 | 4032 | |
3f49f720 CH |
4033 | asoc = sctp_id2assoc(sk, params->assoc_id); |
4034 | if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC && | |
acce7f3b | 4035 | sctp_style(sk, UDP)) |
c0d8bab6 | 4036 | goto out; |
acce7f3b | 4037 | |
3f49f720 | 4038 | sctp_sk(sk)->ep->reconf_enable = !!params->assoc_value; |
c0d8bab6 XL |
4039 | |
4040 | retval = 0; | |
4041 | ||
4042 | out: | |
4043 | return retval; | |
4044 | } | |
4045 | ||
9fb657ae | 4046 | static int sctp_setsockopt_enable_strreset(struct sock *sk, |
356dc6f1 | 4047 | struct sctp_assoc_value *params, |
9fb657ae XL |
4048 | unsigned int optlen) |
4049 | { | |
99a62135 | 4050 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
9fb657ae XL |
4051 | struct sctp_association *asoc; |
4052 | int retval = -EINVAL; | |
4053 | ||
356dc6f1 | 4054 | if (optlen != sizeof(*params)) |
9fb657ae | 4055 | goto out; |
9fb657ae | 4056 | |
356dc6f1 | 4057 | if (params->assoc_value & (~SCTP_ENABLE_STRRESET_MASK)) |
9fb657ae XL |
4058 | goto out; |
4059 | ||
356dc6f1 CH |
4060 | asoc = sctp_id2assoc(sk, params->assoc_id); |
4061 | if (!asoc && params->assoc_id > SCTP_ALL_ASSOC && | |
99a62135 XL |
4062 | sctp_style(sk, UDP)) |
4063 | goto out; | |
4064 | ||
4065 | retval = 0; | |
4066 | ||
9fb657ae | 4067 | if (asoc) { |
356dc6f1 | 4068 | asoc->strreset_enable = params->assoc_value; |
9fb657ae XL |
4069 | goto out; |
4070 | } | |
4071 | ||
9430ff99 | 4072 | if (sctp_style(sk, TCP)) |
356dc6f1 | 4073 | params->assoc_id = SCTP_FUTURE_ASSOC; |
9430ff99 | 4074 | |
356dc6f1 CH |
4075 | if (params->assoc_id == SCTP_FUTURE_ASSOC || |
4076 | params->assoc_id == SCTP_ALL_ASSOC) | |
4077 | ep->strreset_enable = params->assoc_value; | |
99a62135 | 4078 | |
356dc6f1 CH |
4079 | if (params->assoc_id == SCTP_CURRENT_ASSOC || |
4080 | params->assoc_id == SCTP_ALL_ASSOC) | |
99a62135 | 4081 | list_for_each_entry(asoc, &ep->asocs, asocs) |
356dc6f1 | 4082 | asoc->strreset_enable = params->assoc_value; |
9fb657ae XL |
4083 | |
4084 | out: | |
4085 | return retval; | |
4086 | } | |
4087 | ||
7f9d68ac | 4088 | static int sctp_setsockopt_reset_streams(struct sock *sk, |
d4922434 | 4089 | struct sctp_reset_streams *params, |
7f9d68ac XL |
4090 | unsigned int optlen) |
4091 | { | |
7f9d68ac | 4092 | struct sctp_association *asoc; |
7f9d68ac | 4093 | |
2342b8d9 | 4094 | if (optlen < sizeof(*params)) |
7f9d68ac | 4095 | return -EINVAL; |
5960cefa MRL |
4096 | /* srs_number_streams is u16, so optlen can't be bigger than this. */ |
4097 | optlen = min_t(unsigned int, optlen, USHRT_MAX + | |
4098 | sizeof(__u16) * sizeof(*params)); | |
7f9d68ac | 4099 | |
2342b8d9 XL |
4100 | if (params->srs_number_streams * sizeof(__u16) > |
4101 | optlen - sizeof(*params)) | |
d4922434 | 4102 | return -EINVAL; |
2342b8d9 | 4103 | |
7f9d68ac XL |
4104 | asoc = sctp_id2assoc(sk, params->srs_assoc_id); |
4105 | if (!asoc) | |
d4922434 | 4106 | return -EINVAL; |
7f9d68ac | 4107 | |
d4922434 | 4108 | return sctp_send_reset_streams(asoc, params); |
7f9d68ac XL |
4109 | } |
4110 | ||
b97d20ce | 4111 | static int sctp_setsockopt_reset_assoc(struct sock *sk, sctp_assoc_t *associd, |
a92ce1a4 XL |
4112 | unsigned int optlen) |
4113 | { | |
4114 | struct sctp_association *asoc; | |
a92ce1a4 | 4115 | |
b97d20ce CH |
4116 | if (optlen != sizeof(*associd)) |
4117 | return -EINVAL; | |
a92ce1a4 | 4118 | |
b97d20ce | 4119 | asoc = sctp_id2assoc(sk, *associd); |
a92ce1a4 | 4120 | if (!asoc) |
b97d20ce | 4121 | return -EINVAL; |
a92ce1a4 | 4122 | |
b97d20ce | 4123 | return sctp_send_reset_assoc(asoc); |
a92ce1a4 XL |
4124 | } |
4125 | ||
242bd2d5 | 4126 | static int sctp_setsockopt_add_streams(struct sock *sk, |
4d6fb260 | 4127 | struct sctp_add_streams *params, |
242bd2d5 XL |
4128 | unsigned int optlen) |
4129 | { | |
4130 | struct sctp_association *asoc; | |
242bd2d5 | 4131 | |
4d6fb260 CH |
4132 | if (optlen != sizeof(*params)) |
4133 | return -EINVAL; | |
242bd2d5 | 4134 | |
4d6fb260 | 4135 | asoc = sctp_id2assoc(sk, params->sas_assoc_id); |
242bd2d5 | 4136 | if (!asoc) |
4d6fb260 | 4137 | return -EINVAL; |
242bd2d5 | 4138 | |
4d6fb260 | 4139 | return sctp_send_add_streams(asoc, params); |
242bd2d5 XL |
4140 | } |
4141 | ||
13aa8770 | 4142 | static int sctp_setsockopt_scheduler(struct sock *sk, |
4d2fba3a | 4143 | struct sctp_assoc_value *params, |
13aa8770 MRL |
4144 | unsigned int optlen) |
4145 | { | |
7efba10d | 4146 | struct sctp_sock *sp = sctp_sk(sk); |
13aa8770 | 4147 | struct sctp_association *asoc; |
7efba10d | 4148 | int retval = 0; |
13aa8770 | 4149 | |
4d2fba3a | 4150 | if (optlen < sizeof(*params)) |
7efba10d | 4151 | return -EINVAL; |
13aa8770 | 4152 | |
4d2fba3a | 4153 | if (params->assoc_value > SCTP_SS_MAX) |
7efba10d | 4154 | return -EINVAL; |
13aa8770 | 4155 | |
4d2fba3a CH |
4156 | asoc = sctp_id2assoc(sk, params->assoc_id); |
4157 | if (!asoc && params->assoc_id > SCTP_ALL_ASSOC && | |
7efba10d XL |
4158 | sctp_style(sk, UDP)) |
4159 | return -EINVAL; | |
13aa8770 | 4160 | |
7efba10d | 4161 | if (asoc) |
4d2fba3a | 4162 | return sctp_sched_set_sched(asoc, params->assoc_value); |
7efba10d | 4163 | |
b59c19d9 | 4164 | if (sctp_style(sk, TCP)) |
4d2fba3a | 4165 | params->assoc_id = SCTP_FUTURE_ASSOC; |
b59c19d9 | 4166 | |
4d2fba3a CH |
4167 | if (params->assoc_id == SCTP_FUTURE_ASSOC || |
4168 | params->assoc_id == SCTP_ALL_ASSOC) | |
4169 | sp->default_ss = params->assoc_value; | |
7efba10d | 4170 | |
4d2fba3a CH |
4171 | if (params->assoc_id == SCTP_CURRENT_ASSOC || |
4172 | params->assoc_id == SCTP_ALL_ASSOC) { | |
7efba10d XL |
4173 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) { |
4174 | int ret = sctp_sched_set_sched(asoc, | |
4d2fba3a | 4175 | params->assoc_value); |
7efba10d XL |
4176 | |
4177 | if (ret && !retval) | |
4178 | retval = ret; | |
4179 | } | |
4180 | } | |
13aa8770 | 4181 | |
13aa8770 MRL |
4182 | return retval; |
4183 | } | |
4184 | ||
0ccdf3c7 | 4185 | static int sctp_setsockopt_scheduler_value(struct sock *sk, |
d636e7f3 | 4186 | struct sctp_stream_value *params, |
0ccdf3c7 MRL |
4187 | unsigned int optlen) |
4188 | { | |
e7f28248 | 4189 | struct sctp_association *asoc; |
0ccdf3c7 MRL |
4190 | int retval = -EINVAL; |
4191 | ||
d636e7f3 | 4192 | if (optlen < sizeof(*params)) |
0ccdf3c7 | 4193 | goto out; |
0ccdf3c7 | 4194 | |
d636e7f3 CH |
4195 | asoc = sctp_id2assoc(sk, params->assoc_id); |
4196 | if (!asoc && params->assoc_id != SCTP_CURRENT_ASSOC && | |
e7f28248 | 4197 | sctp_style(sk, UDP)) |
0ccdf3c7 MRL |
4198 | goto out; |
4199 | ||
e7f28248 | 4200 | if (asoc) { |
d636e7f3 CH |
4201 | retval = sctp_sched_set_value(asoc, params->stream_id, |
4202 | params->stream_value, GFP_KERNEL); | |
e7f28248 XL |
4203 | goto out; |
4204 | } | |
4205 | ||
4206 | retval = 0; | |
4207 | ||
4208 | list_for_each_entry(asoc, &sctp_sk(sk)->ep->asocs, asocs) { | |
d636e7f3 CH |
4209 | int ret = sctp_sched_set_value(asoc, params->stream_id, |
4210 | params->stream_value, | |
4211 | GFP_KERNEL); | |
e7f28248 XL |
4212 | if (ret && !retval) /* try to return the 1st error. */ |
4213 | retval = ret; | |
4214 | } | |
0ccdf3c7 MRL |
4215 | |
4216 | out: | |
4217 | return retval; | |
4218 | } | |
4219 | ||
772a5869 | 4220 | static int sctp_setsockopt_interleaving_supported(struct sock *sk, |
5b8d3b24 | 4221 | struct sctp_assoc_value *p, |
772a5869 XL |
4222 | unsigned int optlen) |
4223 | { | |
4224 | struct sctp_sock *sp = sctp_sk(sk); | |
2e7709d1 | 4225 | struct sctp_association *asoc; |
772a5869 | 4226 | |
5b8d3b24 CH |
4227 | if (optlen < sizeof(*p)) |
4228 | return -EINVAL; | |
772a5869 | 4229 | |
5b8d3b24 CH |
4230 | asoc = sctp_id2assoc(sk, p->assoc_id); |
4231 | if (!asoc && p->assoc_id != SCTP_FUTURE_ASSOC && sctp_style(sk, UDP)) | |
4232 | return -EINVAL; | |
772a5869 | 4233 | |
2e7709d1 | 4234 | if (!sock_net(sk)->sctp.intl_enable || !sp->frag_interleave) { |
5b8d3b24 | 4235 | return -EPERM; |
772a5869 XL |
4236 | } |
4237 | ||
5b8d3b24 CH |
4238 | sp->ep->intl_enable = !!p->assoc_value; |
4239 | return 0; | |
772a5869 XL |
4240 | } |
4241 | ||
a4262466 | 4242 | static int sctp_setsockopt_reuse_port(struct sock *sk, int *val, |
b0e9a2fe XL |
4243 | unsigned int optlen) |
4244 | { | |
b0e9a2fe XL |
4245 | if (!sctp_style(sk, TCP)) |
4246 | return -EOPNOTSUPP; | |
4247 | ||
4248 | if (sctp_sk(sk)->ep->base.bind_addr.port) | |
4249 | return -EFAULT; | |
4250 | ||
4251 | if (optlen < sizeof(int)) | |
4252 | return -EINVAL; | |
4253 | ||
a4262466 | 4254 | sctp_sk(sk)->reuse = !!*val; |
b0e9a2fe XL |
4255 | |
4256 | return 0; | |
4257 | } | |
4258 | ||
d251f05e XL |
4259 | static int sctp_assoc_ulpevent_type_set(struct sctp_event *param, |
4260 | struct sctp_association *asoc) | |
4261 | { | |
4262 | struct sctp_ulpevent *event; | |
4263 | ||
4264 | sctp_ulpevent_type_set(&asoc->subscribe, param->se_type, param->se_on); | |
4265 | ||
4266 | if (param->se_type == SCTP_SENDER_DRY_EVENT && param->se_on) { | |
4267 | if (sctp_outq_is_empty(&asoc->outqueue)) { | |
4268 | event = sctp_ulpevent_make_sender_dry_event(asoc, | |
4269 | GFP_USER | __GFP_NOWARN); | |
4270 | if (!event) | |
4271 | return -ENOMEM; | |
4272 | ||
4273 | asoc->stream.si->enqueue_event(&asoc->ulpq, event); | |
4274 | } | |
4275 | } | |
4276 | ||
4277 | return 0; | |
4278 | } | |
4279 | ||
565059cb | 4280 | static int sctp_setsockopt_event(struct sock *sk, struct sctp_event *param, |
480ba9c1 XL |
4281 | unsigned int optlen) |
4282 | { | |
d251f05e | 4283 | struct sctp_sock *sp = sctp_sk(sk); |
480ba9c1 | 4284 | struct sctp_association *asoc; |
480ba9c1 XL |
4285 | int retval = 0; |
4286 | ||
565059cb | 4287 | if (optlen < sizeof(*param)) |
d251f05e | 4288 | return -EINVAL; |
480ba9c1 | 4289 | |
565059cb CH |
4290 | if (param->se_type < SCTP_SN_TYPE_BASE || |
4291 | param->se_type > SCTP_SN_TYPE_MAX) | |
d251f05e | 4292 | return -EINVAL; |
480ba9c1 | 4293 | |
565059cb CH |
4294 | asoc = sctp_id2assoc(sk, param->se_assoc_id); |
4295 | if (!asoc && param->se_assoc_id > SCTP_ALL_ASSOC && | |
d251f05e XL |
4296 | sctp_style(sk, UDP)) |
4297 | return -EINVAL; | |
480ba9c1 | 4298 | |
d251f05e | 4299 | if (asoc) |
565059cb | 4300 | return sctp_assoc_ulpevent_type_set(param, asoc); |
480ba9c1 | 4301 | |
99518619 | 4302 | if (sctp_style(sk, TCP)) |
565059cb | 4303 | param->se_assoc_id = SCTP_FUTURE_ASSOC; |
99518619 | 4304 | |
565059cb CH |
4305 | if (param->se_assoc_id == SCTP_FUTURE_ASSOC || |
4306 | param->se_assoc_id == SCTP_ALL_ASSOC) | |
d251f05e | 4307 | sctp_ulpevent_type_set(&sp->subscribe, |
565059cb | 4308 | param->se_type, param->se_on); |
480ba9c1 | 4309 | |
565059cb CH |
4310 | if (param->se_assoc_id == SCTP_CURRENT_ASSOC || |
4311 | param->se_assoc_id == SCTP_ALL_ASSOC) { | |
d251f05e | 4312 | list_for_each_entry(asoc, &sp->ep->asocs, asocs) { |
565059cb | 4313 | int ret = sctp_assoc_ulpevent_type_set(param, asoc); |
d251f05e XL |
4314 | |
4315 | if (ret && !retval) | |
4316 | retval = ret; | |
480ba9c1 XL |
4317 | } |
4318 | } | |
4319 | ||
480ba9c1 XL |
4320 | return retval; |
4321 | } | |
4322 | ||
df2c71ff | 4323 | static int sctp_setsockopt_asconf_supported(struct sock *sk, |
9263ac97 | 4324 | struct sctp_assoc_value *params, |
df2c71ff XL |
4325 | unsigned int optlen) |
4326 | { | |
df2c71ff XL |
4327 | struct sctp_association *asoc; |
4328 | struct sctp_endpoint *ep; | |
4329 | int retval = -EINVAL; | |
4330 | ||
9263ac97 | 4331 | if (optlen != sizeof(*params)) |
df2c71ff | 4332 | goto out; |
df2c71ff | 4333 | |
9263ac97 CH |
4334 | asoc = sctp_id2assoc(sk, params->assoc_id); |
4335 | if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC && | |
df2c71ff XL |
4336 | sctp_style(sk, UDP)) |
4337 | goto out; | |
4338 | ||
4339 | ep = sctp_sk(sk)->ep; | |
9263ac97 | 4340 | ep->asconf_enable = !!params->assoc_value; |
df2c71ff XL |
4341 | |
4342 | if (ep->asconf_enable && ep->auth_enable) { | |
4343 | sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF); | |
4344 | sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF_ACK); | |
4345 | } | |
4346 | ||
4347 | retval = 0; | |
4348 | ||
4349 | out: | |
4350 | return retval; | |
4351 | } | |
4352 | ||
56dd525a | 4353 | static int sctp_setsockopt_auth_supported(struct sock *sk, |
963855a9 | 4354 | struct sctp_assoc_value *params, |
56dd525a XL |
4355 | unsigned int optlen) |
4356 | { | |
56dd525a XL |
4357 | struct sctp_association *asoc; |
4358 | struct sctp_endpoint *ep; | |
4359 | int retval = -EINVAL; | |
4360 | ||
963855a9 | 4361 | if (optlen != sizeof(*params)) |
56dd525a | 4362 | goto out; |
56dd525a | 4363 | |
963855a9 CH |
4364 | asoc = sctp_id2assoc(sk, params->assoc_id); |
4365 | if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC && | |
56dd525a XL |
4366 | sctp_style(sk, UDP)) |
4367 | goto out; | |
4368 | ||
4369 | ep = sctp_sk(sk)->ep; | |
963855a9 | 4370 | if (params->assoc_value) { |
56dd525a XL |
4371 | retval = sctp_auth_init(ep, GFP_KERNEL); |
4372 | if (retval) | |
4373 | goto out; | |
4374 | if (ep->asconf_enable) { | |
4375 | sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF); | |
4376 | sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF_ACK); | |
4377 | } | |
4378 | } | |
4379 | ||
963855a9 | 4380 | ep->auth_enable = !!params->assoc_value; |
56dd525a XL |
4381 | retval = 0; |
4382 | ||
4383 | out: | |
4384 | return retval; | |
4385 | } | |
4386 | ||
d5886b91 | 4387 | static int sctp_setsockopt_ecn_supported(struct sock *sk, |
92c4f172 | 4388 | struct sctp_assoc_value *params, |
d5886b91 XL |
4389 | unsigned int optlen) |
4390 | { | |
d5886b91 XL |
4391 | struct sctp_association *asoc; |
4392 | int retval = -EINVAL; | |
4393 | ||
92c4f172 | 4394 | if (optlen != sizeof(*params)) |
d5886b91 | 4395 | goto out; |
d5886b91 | 4396 | |
92c4f172 CH |
4397 | asoc = sctp_id2assoc(sk, params->assoc_id); |
4398 | if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC && | |
d5886b91 XL |
4399 | sctp_style(sk, UDP)) |
4400 | goto out; | |
4401 | ||
92c4f172 | 4402 | sctp_sk(sk)->ep->ecn_enable = !!params->assoc_value; |
d5886b91 XL |
4403 | retval = 0; |
4404 | ||
4405 | out: | |
4406 | return retval; | |
4407 | } | |
4408 | ||
8d2a6935 | 4409 | static int sctp_setsockopt_pf_expose(struct sock *sk, |
26feba80 | 4410 | struct sctp_assoc_value *params, |
8d2a6935 XL |
4411 | unsigned int optlen) |
4412 | { | |
8d2a6935 XL |
4413 | struct sctp_association *asoc; |
4414 | int retval = -EINVAL; | |
4415 | ||
26feba80 | 4416 | if (optlen != sizeof(*params)) |
8d2a6935 | 4417 | goto out; |
8d2a6935 | 4418 | |
26feba80 | 4419 | if (params->assoc_value > SCTP_PF_EXPOSE_MAX) |
8d2a6935 XL |
4420 | goto out; |
4421 | ||
26feba80 CH |
4422 | asoc = sctp_id2assoc(sk, params->assoc_id); |
4423 | if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC && | |
8d2a6935 XL |
4424 | sctp_style(sk, UDP)) |
4425 | goto out; | |
4426 | ||
4427 | if (asoc) | |
26feba80 | 4428 | asoc->pf_expose = params->assoc_value; |
8d2a6935 | 4429 | else |
26feba80 | 4430 | sctp_sk(sk)->pf_expose = params->assoc_value; |
8d2a6935 XL |
4431 | retval = 0; |
4432 | ||
4433 | out: | |
4434 | return retval; | |
4435 | } | |
4436 | ||
8dba2960 XL |
4437 | static int sctp_setsockopt_encap_port(struct sock *sk, |
4438 | struct sctp_udpencaps *encap, | |
4439 | unsigned int optlen) | |
4440 | { | |
4441 | struct sctp_association *asoc; | |
4442 | struct sctp_transport *t; | |
4443 | __be16 encap_port; | |
4444 | ||
4445 | if (optlen != sizeof(*encap)) | |
4446 | return -EINVAL; | |
4447 | ||
4448 | /* If an address other than INADDR_ANY is specified, and | |
4449 | * no transport is found, then the request is invalid. | |
4450 | */ | |
4451 | encap_port = (__force __be16)encap->sue_port; | |
4452 | if (!sctp_is_any(sk, (union sctp_addr *)&encap->sue_address)) { | |
4453 | t = sctp_addr_id2transport(sk, &encap->sue_address, | |
4454 | encap->sue_assoc_id); | |
4455 | if (!t) | |
4456 | return -EINVAL; | |
4457 | ||
4458 | t->encap_port = encap_port; | |
4459 | return 0; | |
4460 | } | |
4461 | ||
4462 | /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the | |
4463 | * socket is a one to many style socket, and an association | |
4464 | * was not found, then the id was invalid. | |
4465 | */ | |
4466 | asoc = sctp_id2assoc(sk, encap->sue_assoc_id); | |
4467 | if (!asoc && encap->sue_assoc_id != SCTP_FUTURE_ASSOC && | |
4468 | sctp_style(sk, UDP)) | |
4469 | return -EINVAL; | |
4470 | ||
4471 | /* If changes are for association, also apply encap_port to | |
4472 | * each transport. | |
4473 | */ | |
4474 | if (asoc) { | |
4475 | list_for_each_entry(t, &asoc->peer.transport_addr_list, | |
4476 | transports) | |
4477 | t->encap_port = encap_port; | |
4478 | ||
297739bd | 4479 | asoc->encap_port = encap_port; |
8dba2960 XL |
4480 | return 0; |
4481 | } | |
4482 | ||
4483 | sctp_sk(sk)->encap_port = encap_port; | |
4484 | return 0; | |
4485 | } | |
4486 | ||
3190b649 XL |
4487 | static int sctp_setsockopt_probe_interval(struct sock *sk, |
4488 | struct sctp_probeinterval *params, | |
4489 | unsigned int optlen) | |
4490 | { | |
4491 | struct sctp_association *asoc; | |
4492 | struct sctp_transport *t; | |
4493 | __u32 probe_interval; | |
4494 | ||
4495 | if (optlen != sizeof(*params)) | |
4496 | return -EINVAL; | |
4497 | ||
4498 | probe_interval = params->spi_interval; | |
4499 | if (probe_interval && probe_interval < SCTP_PROBE_TIMER_MIN) | |
4500 | return -EINVAL; | |
4501 | ||
4502 | /* If an address other than INADDR_ANY is specified, and | |
4503 | * no transport is found, then the request is invalid. | |
4504 | */ | |
4505 | if (!sctp_is_any(sk, (union sctp_addr *)¶ms->spi_address)) { | |
4506 | t = sctp_addr_id2transport(sk, ¶ms->spi_address, | |
4507 | params->spi_assoc_id); | |
4508 | if (!t) | |
4509 | return -EINVAL; | |
4510 | ||
4511 | t->probe_interval = msecs_to_jiffies(probe_interval); | |
7307e4fa | 4512 | sctp_transport_pl_reset(t); |
3190b649 XL |
4513 | return 0; |
4514 | } | |
4515 | ||
4516 | /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the | |
4517 | * socket is a one to many style socket, and an association | |
4518 | * was not found, then the id was invalid. | |
4519 | */ | |
4520 | asoc = sctp_id2assoc(sk, params->spi_assoc_id); | |
4521 | if (!asoc && params->spi_assoc_id != SCTP_FUTURE_ASSOC && | |
4522 | sctp_style(sk, UDP)) | |
4523 | return -EINVAL; | |
4524 | ||
4525 | /* If changes are for association, also apply probe_interval to | |
4526 | * each transport. | |
4527 | */ | |
4528 | if (asoc) { | |
7307e4fa | 4529 | list_for_each_entry(t, &asoc->peer.transport_addr_list, transports) { |
3190b649 | 4530 | t->probe_interval = msecs_to_jiffies(probe_interval); |
7307e4fa XL |
4531 | sctp_transport_pl_reset(t); |
4532 | } | |
3190b649 XL |
4533 | |
4534 | asoc->probe_interval = msecs_to_jiffies(probe_interval); | |
4535 | return 0; | |
4536 | } | |
4537 | ||
4538 | sctp_sk(sk)->probe_interval = probe_interval; | |
4539 | return 0; | |
4540 | } | |
4541 | ||
1da177e4 LT |
4542 | /* API 6.2 setsockopt(), getsockopt() |
4543 | * | |
4544 | * Applications use setsockopt() and getsockopt() to set or retrieve | |
4545 | * socket options. Socket options are used to change the default | |
4546 | * behavior of sockets calls. They are described in Section 7. | |
4547 | * | |
4548 | * The syntax is: | |
4549 | * | |
4550 | * ret = getsockopt(int sd, int level, int optname, void __user *optval, | |
4551 | * int __user *optlen); | |
4552 | * ret = setsockopt(int sd, int level, int optname, const void __user *optval, | |
4553 | * int optlen); | |
4554 | * | |
4555 | * sd - the socket descript. | |
4556 | * level - set to IPPROTO_SCTP for all SCTP options. | |
4557 | * optname - the option name. | |
4558 | * optval - the buffer to store the value of the option. | |
4559 | * optlen - the size of the buffer. | |
4560 | */ | |
dda91928 | 4561 | static int sctp_setsockopt(struct sock *sk, int level, int optname, |
a7b75c5a | 4562 | sockptr_t optval, unsigned int optlen) |
1da177e4 | 4563 | { |
ca84bd05 | 4564 | void *kopt = NULL; |
1da177e4 LT |
4565 | int retval = 0; |
4566 | ||
bb33381d | 4567 | pr_debug("%s: sk:%p, optname:%d\n", __func__, sk, optname); |
1da177e4 LT |
4568 | |
4569 | /* I can hardly begin to describe how wrong this is. This is | |
4570 | * so broken as to be worse than useless. The API draft | |
4571 | * REALLY is NOT helpful here... I am not convinced that the | |
4572 | * semantics of setsockopt() with a level OTHER THAN SOL_SCTP | |
4573 | * are at all well-founded. | |
4574 | */ | |
4575 | if (level != SOL_SCTP) { | |
4576 | struct sctp_af *af = sctp_sk(sk)->pf->af; | |
6c8983a6 CH |
4577 | |
4578 | return af->setsockopt(sk, level, optname, optval, optlen); | |
1da177e4 LT |
4579 | } |
4580 | ||
ca84bd05 | 4581 | if (optlen > 0) { |
2f3fdd8d XL |
4582 | /* Trim it to the biggest size sctp sockopt may need if necessary */ |
4583 | optlen = min_t(unsigned int, optlen, | |
4584 | PAGE_ALIGN(USHRT_MAX + | |
4585 | sizeof(__u16) * sizeof(struct sctp_reset_streams))); | |
a7b75c5a | 4586 | kopt = memdup_sockptr(optval, optlen); |
ca84bd05 CH |
4587 | if (IS_ERR(kopt)) |
4588 | return PTR_ERR(kopt); | |
4589 | } | |
4590 | ||
048ed4b6 | 4591 | lock_sock(sk); |
1da177e4 LT |
4592 | |
4593 | switch (optname) { | |
4594 | case SCTP_SOCKOPT_BINDX_ADD: | |
4595 | /* 'optlen' is the size of the addresses buffer. */ | |
8c7517f5 CH |
4596 | retval = sctp_setsockopt_bindx(sk, kopt, optlen, |
4597 | SCTP_BINDX_ADD_ADDR); | |
1da177e4 LT |
4598 | break; |
4599 | ||
4600 | case SCTP_SOCKOPT_BINDX_REM: | |
4601 | /* 'optlen' is the size of the addresses buffer. */ | |
8c7517f5 CH |
4602 | retval = sctp_setsockopt_bindx(sk, kopt, optlen, |
4603 | SCTP_BINDX_REM_ADDR); | |
1da177e4 LT |
4604 | break; |
4605 | ||
88a0a948 VY |
4606 | case SCTP_SOCKOPT_CONNECTX_OLD: |
4607 | /* 'optlen' is the size of the addresses buffer. */ | |
ce5b2f89 | 4608 | retval = sctp_setsockopt_connectx_old(sk, kopt, optlen); |
88a0a948 VY |
4609 | break; |
4610 | ||
3f7a87d2 FF |
4611 | case SCTP_SOCKOPT_CONNECTX: |
4612 | /* 'optlen' is the size of the addresses buffer. */ | |
ce5b2f89 | 4613 | retval = sctp_setsockopt_connectx(sk, kopt, optlen); |
3f7a87d2 FF |
4614 | break; |
4615 | ||
1da177e4 | 4616 | case SCTP_DISABLE_FRAGMENTS: |
10835825 | 4617 | retval = sctp_setsockopt_disable_fragments(sk, kopt, optlen); |
1da177e4 LT |
4618 | break; |
4619 | ||
4620 | case SCTP_EVENTS: | |
a98d21a1 | 4621 | retval = sctp_setsockopt_events(sk, kopt, optlen); |
1da177e4 LT |
4622 | break; |
4623 | ||
4624 | case SCTP_AUTOCLOSE: | |
0b49a65c | 4625 | retval = sctp_setsockopt_autoclose(sk, kopt, optlen); |
1da177e4 LT |
4626 | break; |
4627 | ||
4628 | case SCTP_PEER_ADDR_PARAMS: | |
9b7b0d1a | 4629 | retval = sctp_setsockopt_peer_addr_params(sk, kopt, optlen); |
1da177e4 LT |
4630 | break; |
4631 | ||
4580ccc0 | 4632 | case SCTP_DELAYED_SACK: |
ebb25def | 4633 | retval = sctp_setsockopt_delayed_ack(sk, kopt, optlen); |
7708610b | 4634 | break; |
d49d91d7 | 4635 | case SCTP_PARTIAL_DELIVERY_POINT: |
bb13d647 | 4636 | retval = sctp_setsockopt_partial_delivery_point(sk, kopt, optlen); |
d49d91d7 | 4637 | break; |
7708610b | 4638 | |
1da177e4 | 4639 | case SCTP_INITMSG: |
9dfa6f04 | 4640 | retval = sctp_setsockopt_initmsg(sk, kopt, optlen); |
1da177e4 LT |
4641 | break; |
4642 | case SCTP_DEFAULT_SEND_PARAM: | |
c23ad6d2 | 4643 | retval = sctp_setsockopt_default_send_param(sk, kopt, optlen); |
1da177e4 | 4644 | break; |
6b3fd5f3 | 4645 | case SCTP_DEFAULT_SNDINFO: |
8a2409d3 | 4646 | retval = sctp_setsockopt_default_sndinfo(sk, kopt, optlen); |
6b3fd5f3 | 4647 | break; |
1da177e4 | 4648 | case SCTP_PRIMARY_ADDR: |
1eec6958 | 4649 | retval = sctp_setsockopt_primary_addr(sk, kopt, optlen); |
1da177e4 LT |
4650 | break; |
4651 | case SCTP_SET_PEER_PRIMARY_ADDR: | |
46a0ae9d | 4652 | retval = sctp_setsockopt_peer_primary_addr(sk, kopt, optlen); |
1da177e4 LT |
4653 | break; |
4654 | case SCTP_NODELAY: | |
f87ddbc0 | 4655 | retval = sctp_setsockopt_nodelay(sk, kopt, optlen); |
1da177e4 LT |
4656 | break; |
4657 | case SCTP_RTOINFO: | |
af5ae60e | 4658 | retval = sctp_setsockopt_rtoinfo(sk, kopt, optlen); |
1da177e4 LT |
4659 | break; |
4660 | case SCTP_ASSOCINFO: | |
5b864c8d | 4661 | retval = sctp_setsockopt_associnfo(sk, kopt, optlen); |
1da177e4 LT |
4662 | break; |
4663 | case SCTP_I_WANT_MAPPED_V4_ADDR: | |
ffc08f08 | 4664 | retval = sctp_setsockopt_mappedv4(sk, kopt, optlen); |
1da177e4 LT |
4665 | break; |
4666 | case SCTP_MAXSEG: | |
dcd03575 | 4667 | retval = sctp_setsockopt_maxseg(sk, kopt, optlen); |
1da177e4 | 4668 | break; |
0f3fffd8 | 4669 | case SCTP_ADAPTATION_LAYER: |
07e5035c | 4670 | retval = sctp_setsockopt_adaptation_layer(sk, kopt, optlen); |
1da177e4 | 4671 | break; |
6ab792f5 | 4672 | case SCTP_CONTEXT: |
722eca9e | 4673 | retval = sctp_setsockopt_context(sk, kopt, optlen); |
6ab792f5 | 4674 | break; |
b6e1331f | 4675 | case SCTP_FRAGMENT_INTERLEAVE: |
1031cea0 | 4676 | retval = sctp_setsockopt_fragment_interleave(sk, kopt, optlen); |
b6e1331f | 4677 | break; |
70331571 | 4678 | case SCTP_MAX_BURST: |
f5bee0ad | 4679 | retval = sctp_setsockopt_maxburst(sk, kopt, optlen); |
70331571 | 4680 | break; |
65b07e5d | 4681 | case SCTP_AUTH_CHUNK: |
88266d31 | 4682 | retval = sctp_setsockopt_auth_chunk(sk, kopt, optlen); |
65b07e5d VY |
4683 | break; |
4684 | case SCTP_HMAC_IDENT: | |
3564ef44 | 4685 | retval = sctp_setsockopt_hmac_ident(sk, kopt, optlen); |
65b07e5d VY |
4686 | break; |
4687 | case SCTP_AUTH_KEY: | |
534d13d0 | 4688 | retval = sctp_setsockopt_auth_key(sk, kopt, optlen); |
65b07e5d VY |
4689 | break; |
4690 | case SCTP_AUTH_ACTIVE_KEY: | |
dcab0a7a | 4691 | retval = sctp_setsockopt_active_key(sk, kopt, optlen); |
65b07e5d VY |
4692 | break; |
4693 | case SCTP_AUTH_DELETE_KEY: | |
97dc9f2e | 4694 | retval = sctp_setsockopt_del_key(sk, kopt, optlen); |
65b07e5d | 4695 | break; |
601590ec | 4696 | case SCTP_AUTH_DEACTIVATE_KEY: |
76b3d0c4 | 4697 | retval = sctp_setsockopt_deactivate_key(sk, kopt, optlen); |
601590ec | 4698 | break; |
7dc04d71 | 4699 | case SCTP_AUTO_ASCONF: |
c9abc2c1 | 4700 | retval = sctp_setsockopt_auto_asconf(sk, kopt, optlen); |
7dc04d71 | 4701 | break; |
5aa93bcf | 4702 | case SCTP_PEER_ADDR_THLDS: |
b0ac3bb8 | 4703 | retval = sctp_setsockopt_paddr_thresholds(sk, kopt, optlen, |
d467ac0a XL |
4704 | false); |
4705 | break; | |
4706 | case SCTP_PEER_ADDR_THLDS_V2: | |
b0ac3bb8 | 4707 | retval = sctp_setsockopt_paddr_thresholds(sk, kopt, optlen, |
d467ac0a | 4708 | true); |
5aa93bcf | 4709 | break; |
0d3a421d | 4710 | case SCTP_RECVRCVINFO: |
a98af7c8 | 4711 | retval = sctp_setsockopt_recvrcvinfo(sk, kopt, optlen); |
0d3a421d | 4712 | break; |
2347c80f | 4713 | case SCTP_RECVNXTINFO: |
cfa6fde2 | 4714 | retval = sctp_setsockopt_recvnxtinfo(sk, kopt, optlen); |
2347c80f | 4715 | break; |
28aa4c26 | 4716 | case SCTP_PR_SUPPORTED: |
4a97fa4f | 4717 | retval = sctp_setsockopt_pr_supported(sk, kopt, optlen); |
28aa4c26 | 4718 | break; |
f959fb44 | 4719 | case SCTP_DEFAULT_PRINFO: |
ac37435b | 4720 | retval = sctp_setsockopt_default_prinfo(sk, kopt, optlen); |
f959fb44 | 4721 | break; |
c0d8bab6 | 4722 | case SCTP_RECONFIG_SUPPORTED: |
3f49f720 | 4723 | retval = sctp_setsockopt_reconfig_supported(sk, kopt, optlen); |
c0d8bab6 | 4724 | break; |
9fb657ae | 4725 | case SCTP_ENABLE_STREAM_RESET: |
356dc6f1 | 4726 | retval = sctp_setsockopt_enable_strreset(sk, kopt, optlen); |
9fb657ae | 4727 | break; |
7f9d68ac | 4728 | case SCTP_RESET_STREAMS: |
d4922434 | 4729 | retval = sctp_setsockopt_reset_streams(sk, kopt, optlen); |
7f9d68ac | 4730 | break; |
a92ce1a4 | 4731 | case SCTP_RESET_ASSOC: |
b97d20ce | 4732 | retval = sctp_setsockopt_reset_assoc(sk, kopt, optlen); |
a92ce1a4 | 4733 | break; |
242bd2d5 | 4734 | case SCTP_ADD_STREAMS: |
4d6fb260 | 4735 | retval = sctp_setsockopt_add_streams(sk, kopt, optlen); |
242bd2d5 | 4736 | break; |
13aa8770 | 4737 | case SCTP_STREAM_SCHEDULER: |
4d2fba3a | 4738 | retval = sctp_setsockopt_scheduler(sk, kopt, optlen); |
13aa8770 | 4739 | break; |
0ccdf3c7 | 4740 | case SCTP_STREAM_SCHEDULER_VALUE: |
d636e7f3 | 4741 | retval = sctp_setsockopt_scheduler_value(sk, kopt, optlen); |
0ccdf3c7 | 4742 | break; |
772a5869 | 4743 | case SCTP_INTERLEAVING_SUPPORTED: |
5b8d3b24 | 4744 | retval = sctp_setsockopt_interleaving_supported(sk, kopt, |
772a5869 XL |
4745 | optlen); |
4746 | break; | |
b0e9a2fe | 4747 | case SCTP_REUSE_PORT: |
a4262466 | 4748 | retval = sctp_setsockopt_reuse_port(sk, kopt, optlen); |
b0e9a2fe | 4749 | break; |
480ba9c1 | 4750 | case SCTP_EVENT: |
565059cb | 4751 | retval = sctp_setsockopt_event(sk, kopt, optlen); |
480ba9c1 | 4752 | break; |
df2c71ff | 4753 | case SCTP_ASCONF_SUPPORTED: |
9263ac97 | 4754 | retval = sctp_setsockopt_asconf_supported(sk, kopt, optlen); |
df2c71ff | 4755 | break; |
56dd525a | 4756 | case SCTP_AUTH_SUPPORTED: |
963855a9 | 4757 | retval = sctp_setsockopt_auth_supported(sk, kopt, optlen); |
56dd525a | 4758 | break; |
d5886b91 | 4759 | case SCTP_ECN_SUPPORTED: |
92c4f172 | 4760 | retval = sctp_setsockopt_ecn_supported(sk, kopt, optlen); |
d5886b91 | 4761 | break; |
8d2a6935 | 4762 | case SCTP_EXPOSE_POTENTIALLY_FAILED_STATE: |
26feba80 | 4763 | retval = sctp_setsockopt_pf_expose(sk, kopt, optlen); |
8d2a6935 | 4764 | break; |
8dba2960 XL |
4765 | case SCTP_REMOTE_UDP_ENCAPS_PORT: |
4766 | retval = sctp_setsockopt_encap_port(sk, kopt, optlen); | |
4767 | break; | |
3190b649 XL |
4768 | case SCTP_PLPMTUD_PROBE_INTERVAL: |
4769 | retval = sctp_setsockopt_probe_interval(sk, kopt, optlen); | |
4770 | break; | |
1da177e4 LT |
4771 | default: |
4772 | retval = -ENOPROTOOPT; | |
4773 | break; | |
3ff50b79 | 4774 | } |
1da177e4 | 4775 | |
048ed4b6 | 4776 | release_sock(sk); |
ca84bd05 | 4777 | kfree(kopt); |
1da177e4 LT |
4778 | return retval; |
4779 | } | |
4780 | ||
4781 | /* API 3.1.6 connect() - UDP Style Syntax | |
4782 | * | |
4783 | * An application may use the connect() call in the UDP model to initiate an | |
4784 | * association without sending data. | |
4785 | * | |
4786 | * The syntax is: | |
4787 | * | |
4788 | * ret = connect(int sd, const struct sockaddr *nam, socklen_t len); | |
4789 | * | |
4790 | * sd: the socket descriptor to have a new association added to. | |
4791 | * | |
4792 | * nam: the address structure (either struct sockaddr_in or struct | |
4793 | * sockaddr_in6 defined in RFC2553 [7]). | |
4794 | * | |
4795 | * len: the size of the address. | |
4796 | */ | |
dda91928 | 4797 | static int sctp_connect(struct sock *sk, struct sockaddr *addr, |
644fbdea | 4798 | int addr_len, int flags) |
1da177e4 | 4799 | { |
3f7a87d2 | 4800 | struct sctp_af *af; |
9b6c0887 | 4801 | int err = -EINVAL; |
1da177e4 | 4802 | |
048ed4b6 | 4803 | lock_sock(sk); |
bb33381d DB |
4804 | pr_debug("%s: sk:%p, sockaddr:%p, addr_len:%d\n", __func__, sk, |
4805 | addr, addr_len); | |
1da177e4 | 4806 | |
3f7a87d2 | 4807 | /* Validate addr_len before calling common connect/connectx routine. */ |
9b6c0887 XL |
4808 | af = sctp_get_af_specific(addr->sa_family); |
4809 | if (af && addr_len >= af->sockaddr_len) | |
644fbdea | 4810 | err = __sctp_connect(sk, addr, af->sockaddr_len, flags, NULL); |
1da177e4 | 4811 | |
048ed4b6 | 4812 | release_sock(sk); |
1da177e4 LT |
4813 | return err; |
4814 | } | |
4815 | ||
644fbdea XL |
4816 | int sctp_inet_connect(struct socket *sock, struct sockaddr *uaddr, |
4817 | int addr_len, int flags) | |
4818 | { | |
4819 | if (addr_len < sizeof(uaddr->sa_family)) | |
4820 | return -EINVAL; | |
4821 | ||
4822 | if (uaddr->sa_family == AF_UNSPEC) | |
4823 | return -EOPNOTSUPP; | |
4824 | ||
4825 | return sctp_connect(sock->sk, uaddr, addr_len, flags); | |
4826 | } | |
4827 | ||
1da177e4 | 4828 | /* FIXME: Write comments. */ |
dda91928 | 4829 | static int sctp_disconnect(struct sock *sk, int flags) |
1da177e4 LT |
4830 | { |
4831 | return -EOPNOTSUPP; /* STUB */ | |
4832 | } | |
4833 | ||
4834 | /* 4.1.4 accept() - TCP Style Syntax | |
4835 | * | |
4836 | * Applications use accept() call to remove an established SCTP | |
4837 | * association from the accept queue of the endpoint. A new socket | |
4838 | * descriptor will be returned from accept() to represent the newly | |
4839 | * formed association. | |
4840 | */ | |
cdfbabfb | 4841 | static struct sock *sctp_accept(struct sock *sk, int flags, int *err, bool kern) |
1da177e4 LT |
4842 | { |
4843 | struct sctp_sock *sp; | |
4844 | struct sctp_endpoint *ep; | |
4845 | struct sock *newsk = NULL; | |
4846 | struct sctp_association *asoc; | |
4847 | long timeo; | |
4848 | int error = 0; | |
4849 | ||
048ed4b6 | 4850 | lock_sock(sk); |
1da177e4 LT |
4851 | |
4852 | sp = sctp_sk(sk); | |
4853 | ep = sp->ep; | |
4854 | ||
4855 | if (!sctp_style(sk, TCP)) { | |
4856 | error = -EOPNOTSUPP; | |
4857 | goto out; | |
4858 | } | |
4859 | ||
4860 | if (!sctp_sstate(sk, LISTENING)) { | |
4861 | error = -EINVAL; | |
4862 | goto out; | |
4863 | } | |
4864 | ||
8abfedd8 | 4865 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
1da177e4 LT |
4866 | |
4867 | error = sctp_wait_for_accept(sk, timeo); | |
4868 | if (error) | |
4869 | goto out; | |
4870 | ||
4871 | /* We treat the list of associations on the endpoint as the accept | |
4872 | * queue and pick the first association on the list. | |
4873 | */ | |
4874 | asoc = list_entry(ep->asocs.next, struct sctp_association, asocs); | |
4875 | ||
cdfbabfb | 4876 | newsk = sp->pf->create_accept_sk(sk, asoc, kern); |
1da177e4 LT |
4877 | if (!newsk) { |
4878 | error = -ENOMEM; | |
4879 | goto out; | |
4880 | } | |
4881 | ||
4882 | /* Populate the fields of the newsk from the oldsk and migrate the | |
4883 | * asoc to the newsk. | |
4884 | */ | |
89664c62 XL |
4885 | error = sctp_sock_migrate(sk, newsk, asoc, SCTP_SOCKET_TCP); |
4886 | if (error) { | |
4887 | sk_common_release(newsk); | |
4888 | newsk = NULL; | |
4889 | } | |
1da177e4 LT |
4890 | |
4891 | out: | |
048ed4b6 | 4892 | release_sock(sk); |
d808ad9a | 4893 | *err = error; |
1da177e4 LT |
4894 | return newsk; |
4895 | } | |
4896 | ||
4897 | /* The SCTP ioctl handler. */ | |
dda91928 | 4898 | static int sctp_ioctl(struct sock *sk, int cmd, unsigned long arg) |
1da177e4 | 4899 | { |
65040c33 DEFP |
4900 | int rc = -ENOTCONN; |
4901 | ||
048ed4b6 | 4902 | lock_sock(sk); |
65040c33 DEFP |
4903 | |
4904 | /* | |
4905 | * SEQPACKET-style sockets in LISTENING state are valid, for | |
4906 | * SCTP, so only discard TCP-style sockets in LISTENING state. | |
4907 | */ | |
4908 | if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING)) | |
4909 | goto out; | |
4910 | ||
4911 | switch (cmd) { | |
4912 | case SIOCINQ: { | |
4913 | struct sk_buff *skb; | |
4914 | unsigned int amount = 0; | |
4915 | ||
4916 | skb = skb_peek(&sk->sk_receive_queue); | |
4917 | if (skb != NULL) { | |
4918 | /* | |
4919 | * We will only return the amount of this packet since | |
4920 | * that is all that will be read. | |
4921 | */ | |
4922 | amount = skb->len; | |
4923 | } | |
4924 | rc = put_user(amount, (int __user *)arg); | |
65040c33 | 4925 | break; |
9a7241c2 | 4926 | } |
65040c33 DEFP |
4927 | default: |
4928 | rc = -ENOIOCTLCMD; | |
4929 | break; | |
4930 | } | |
4931 | out: | |
048ed4b6 | 4932 | release_sock(sk); |
65040c33 | 4933 | return rc; |
1da177e4 LT |
4934 | } |
4935 | ||
4936 | /* This is the function which gets called during socket creation to | |
4937 | * initialized the SCTP-specific portion of the sock. | |
4938 | * The sock structure should already be zero-filled memory. | |
4939 | */ | |
dda91928 | 4940 | static int sctp_init_sock(struct sock *sk) |
1da177e4 | 4941 | { |
e1fc3b14 | 4942 | struct net *net = sock_net(sk); |
1da177e4 LT |
4943 | struct sctp_sock *sp; |
4944 | ||
bb33381d | 4945 | pr_debug("%s: sk:%p\n", __func__, sk); |
1da177e4 LT |
4946 | |
4947 | sp = sctp_sk(sk); | |
4948 | ||
4949 | /* Initialize the SCTP per socket area. */ | |
4950 | switch (sk->sk_type) { | |
4951 | case SOCK_SEQPACKET: | |
4952 | sp->type = SCTP_SOCKET_UDP; | |
4953 | break; | |
4954 | case SOCK_STREAM: | |
4955 | sp->type = SCTP_SOCKET_TCP; | |
4956 | break; | |
4957 | default: | |
4958 | return -ESOCKTNOSUPPORT; | |
4959 | } | |
4960 | ||
90017acc MRL |
4961 | sk->sk_gso_type = SKB_GSO_SCTP; |
4962 | ||
1da177e4 LT |
4963 | /* Initialize default send parameters. These parameters can be |
4964 | * modified with the SCTP_DEFAULT_SEND_PARAM socket option. | |
4965 | */ | |
4966 | sp->default_stream = 0; | |
4967 | sp->default_ppid = 0; | |
4968 | sp->default_flags = 0; | |
4969 | sp->default_context = 0; | |
4970 | sp->default_timetolive = 0; | |
4971 | ||
6ab792f5 | 4972 | sp->default_rcv_context = 0; |
e1fc3b14 | 4973 | sp->max_burst = net->sctp.max_burst; |
6ab792f5 | 4974 | |
3c68198e NH |
4975 | sp->sctp_hmac_alg = net->sctp.sctp_hmac_alg; |
4976 | ||
1da177e4 LT |
4977 | /* Initialize default setup parameters. These parameters |
4978 | * can be modified with the SCTP_INITMSG socket option or | |
4979 | * overridden by the SCTP_INIT CMSG. | |
4980 | */ | |
4981 | sp->initmsg.sinit_num_ostreams = sctp_max_outstreams; | |
4982 | sp->initmsg.sinit_max_instreams = sctp_max_instreams; | |
e1fc3b14 EB |
4983 | sp->initmsg.sinit_max_attempts = net->sctp.max_retrans_init; |
4984 | sp->initmsg.sinit_max_init_timeo = net->sctp.rto_max; | |
1da177e4 LT |
4985 | |
4986 | /* Initialize default RTO related parameters. These parameters can | |
4987 | * be modified for with the SCTP_RTOINFO socket option. | |
4988 | */ | |
e1fc3b14 EB |
4989 | sp->rtoinfo.srto_initial = net->sctp.rto_initial; |
4990 | sp->rtoinfo.srto_max = net->sctp.rto_max; | |
4991 | sp->rtoinfo.srto_min = net->sctp.rto_min; | |
1da177e4 LT |
4992 | |
4993 | /* Initialize default association related parameters. These parameters | |
4994 | * can be modified with the SCTP_ASSOCINFO socket option. | |
4995 | */ | |
e1fc3b14 | 4996 | sp->assocparams.sasoc_asocmaxrxt = net->sctp.max_retrans_association; |
1da177e4 LT |
4997 | sp->assocparams.sasoc_number_peer_destinations = 0; |
4998 | sp->assocparams.sasoc_peer_rwnd = 0; | |
4999 | sp->assocparams.sasoc_local_rwnd = 0; | |
e1fc3b14 | 5000 | sp->assocparams.sasoc_cookie_life = net->sctp.valid_cookie_life; |
1da177e4 LT |
5001 | |
5002 | /* Initialize default event subscriptions. By default, all the | |
d808ad9a | 5003 | * options are off. |
1da177e4 | 5004 | */ |
2cc0eeb6 | 5005 | sp->subscribe = 0; |
1da177e4 LT |
5006 | |
5007 | /* Default Peer Address Parameters. These defaults can | |
5008 | * be modified via SCTP_PEER_ADDR_PARAMS | |
5009 | */ | |
e1fc3b14 | 5010 | sp->hbinterval = net->sctp.hb_interval; |
f1bfe8b5 | 5011 | sp->udp_port = htons(net->sctp.udp_port); |
e8a3001c | 5012 | sp->encap_port = htons(net->sctp.encap_port); |
e1fc3b14 | 5013 | sp->pathmaxrxt = net->sctp.max_retrans_path; |
8add543e | 5014 | sp->pf_retrans = net->sctp.pf_retrans; |
34515e94 | 5015 | sp->ps_retrans = net->sctp.ps_retrans; |
aef587be | 5016 | sp->pf_expose = net->sctp.pf_expose; |
4e2d52bf | 5017 | sp->pathmtu = 0; /* allow default discovery */ |
e1fc3b14 | 5018 | sp->sackdelay = net->sctp.sack_timeout; |
7bfe8bdb | 5019 | sp->sackfreq = 2; |
52ccb8e9 | 5020 | sp->param_flags = SPP_HB_ENABLE | |
d808ad9a YH |
5021 | SPP_PMTUD_ENABLE | |
5022 | SPP_SACKDELAY_ENABLE; | |
7efba10d | 5023 | sp->default_ss = SCTP_SS_DEFAULT; |
1da177e4 LT |
5024 | |
5025 | /* If enabled no SCTP message fragmentation will be performed. | |
5026 | * Configure through SCTP_DISABLE_FRAGMENTS socket option. | |
5027 | */ | |
5028 | sp->disable_fragments = 0; | |
5029 | ||
208edef6 SS |
5030 | /* Enable Nagle algorithm by default. */ |
5031 | sp->nodelay = 0; | |
1da177e4 | 5032 | |
0d3a421d | 5033 | sp->recvrcvinfo = 0; |
2347c80f | 5034 | sp->recvnxtinfo = 0; |
0d3a421d | 5035 | |
1da177e4 LT |
5036 | /* Enable by default. */ |
5037 | sp->v4mapped = 1; | |
5038 | ||
5039 | /* Auto-close idle associations after the configured | |
5040 | * number of seconds. A value of 0 disables this | |
5041 | * feature. Configure through the SCTP_AUTOCLOSE socket option, | |
5042 | * for UDP-style sockets only. | |
5043 | */ | |
5044 | sp->autoclose = 0; | |
5045 | ||
5046 | /* User specified fragmentation limit. */ | |
5047 | sp->user_frag = 0; | |
5048 | ||
0f3fffd8 | 5049 | sp->adaptation_ind = 0; |
1da177e4 LT |
5050 | |
5051 | sp->pf = sctp_get_pf_specific(sk->sk_family); | |
5052 | ||
5053 | /* Control variables for partial data delivery. */ | |
b6e1331f | 5054 | atomic_set(&sp->pd_mode, 0); |
1da177e4 | 5055 | skb_queue_head_init(&sp->pd_lobby); |
b6e1331f | 5056 | sp->frag_interleave = 0; |
d1e462a7 | 5057 | sp->probe_interval = net->sctp.probe_interval; |
1da177e4 LT |
5058 | |
5059 | /* Create a per socket endpoint structure. Even if we | |
5060 | * change the data structure relationships, this may still | |
5061 | * be useful for storing pre-connect address information. | |
5062 | */ | |
c164b838 DB |
5063 | sp->ep = sctp_endpoint_new(sk, GFP_KERNEL); |
5064 | if (!sp->ep) | |
1da177e4 LT |
5065 | return -ENOMEM; |
5066 | ||
1da177e4 LT |
5067 | sp->hmac = NULL; |
5068 | ||
0a2fbac1 DB |
5069 | sk->sk_destruct = sctp_destruct_sock; |
5070 | ||
1da177e4 | 5071 | SCTP_DBG_OBJCNT_INC(sock); |
6f756a8c | 5072 | |
8cb38a60 | 5073 | sk_sockets_allocated_inc(sk); |
e1fc3b14 | 5074 | sock_prot_inuse_add(net, sk->sk_prot, 1); |
2d45a02d | 5075 | |
1da177e4 LT |
5076 | return 0; |
5077 | } | |
5078 | ||
2d45a02d MRL |
5079 | /* Cleanup any SCTP per socket resources. Must be called with |
5080 | * sock_net(sk)->sctp.addr_wq_lock held if sp->do_auto_asconf is true | |
5081 | */ | |
dda91928 | 5082 | static void sctp_destroy_sock(struct sock *sk) |
1da177e4 | 5083 | { |
9f7d653b | 5084 | struct sctp_sock *sp; |
1da177e4 | 5085 | |
bb33381d | 5086 | pr_debug("%s: sk:%p\n", __func__, sk); |
1da177e4 LT |
5087 | |
5088 | /* Release our hold on the endpoint. */ | |
9f7d653b | 5089 | sp = sctp_sk(sk); |
1abd165e DB |
5090 | /* This could happen during socket init, thus we bail out |
5091 | * early, since the rest of the below is not setup either. | |
5092 | */ | |
5093 | if (sp->ep == NULL) | |
5094 | return; | |
5095 | ||
9f7d653b MH |
5096 | if (sp->do_auto_asconf) { |
5097 | sp->do_auto_asconf = 0; | |
5098 | list_del(&sp->auto_asconf_list); | |
5099 | } | |
5100 | sctp_endpoint_free(sp->ep); | |
8cb38a60 | 5101 | sk_sockets_allocated_dec(sk); |
9a57f7fa | 5102 | sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); |
1da177e4 LT |
5103 | } |
5104 | ||
0a2fbac1 | 5105 | /* Triggered when there are no references on the socket anymore */ |
6431b0f6 | 5106 | static void sctp_destruct_common(struct sock *sk) |
0a2fbac1 DB |
5107 | { |
5108 | struct sctp_sock *sp = sctp_sk(sk); | |
5109 | ||
5110 | /* Free up the HMAC transform. */ | |
5821c769 | 5111 | crypto_free_shash(sp->hmac); |
6431b0f6 | 5112 | } |
0a2fbac1 | 5113 | |
6431b0f6 KI |
5114 | static void sctp_destruct_sock(struct sock *sk) |
5115 | { | |
5116 | sctp_destruct_common(sk); | |
0a2fbac1 DB |
5117 | inet_sock_destruct(sk); |
5118 | } | |
5119 | ||
1da177e4 LT |
5120 | /* API 4.1.7 shutdown() - TCP Style Syntax |
5121 | * int shutdown(int socket, int how); | |
5122 | * | |
5123 | * sd - the socket descriptor of the association to be closed. | |
5124 | * how - Specifies the type of shutdown. The values are | |
5125 | * as follows: | |
5126 | * SHUT_RD | |
5127 | * Disables further receive operations. No SCTP | |
5128 | * protocol action is taken. | |
5129 | * SHUT_WR | |
5130 | * Disables further send operations, and initiates | |
5131 | * the SCTP shutdown sequence. | |
5132 | * SHUT_RDWR | |
5133 | * Disables further send and receive operations | |
5134 | * and initiates the SCTP shutdown sequence. | |
5135 | */ | |
dda91928 | 5136 | static void sctp_shutdown(struct sock *sk, int how) |
1da177e4 | 5137 | { |
55e26eb9 | 5138 | struct net *net = sock_net(sk); |
1da177e4 | 5139 | struct sctp_endpoint *ep; |
1da177e4 LT |
5140 | |
5141 | if (!sctp_style(sk, TCP)) | |
5142 | return; | |
5143 | ||
5bf35ddf XL |
5144 | ep = sctp_sk(sk)->ep; |
5145 | if (how & SEND_SHUTDOWN && !list_empty(&ep->asocs)) { | |
5146 | struct sctp_association *asoc; | |
5147 | ||
cbabf463 | 5148 | inet_sk_set_state(sk, SCTP_SS_CLOSING); |
5bf35ddf XL |
5149 | asoc = list_entry(ep->asocs.next, |
5150 | struct sctp_association, asocs); | |
5151 | sctp_primitive_SHUTDOWN(net, asoc, NULL); | |
1da177e4 LT |
5152 | } |
5153 | } | |
5154 | ||
52c52a61 XL |
5155 | int sctp_get_sctp_info(struct sock *sk, struct sctp_association *asoc, |
5156 | struct sctp_info *info) | |
5157 | { | |
5158 | struct sctp_transport *prim; | |
5159 | struct list_head *pos; | |
5160 | int mask; | |
5161 | ||
5162 | memset(info, 0, sizeof(*info)); | |
5163 | if (!asoc) { | |
5164 | struct sctp_sock *sp = sctp_sk(sk); | |
5165 | ||
5166 | info->sctpi_s_autoclose = sp->autoclose; | |
5167 | info->sctpi_s_adaptation_ind = sp->adaptation_ind; | |
5168 | info->sctpi_s_pd_point = sp->pd_point; | |
5169 | info->sctpi_s_nodelay = sp->nodelay; | |
5170 | info->sctpi_s_disable_fragments = sp->disable_fragments; | |
5171 | info->sctpi_s_v4mapped = sp->v4mapped; | |
5172 | info->sctpi_s_frag_interleave = sp->frag_interleave; | |
40eb90e9 | 5173 | info->sctpi_s_type = sp->type; |
52c52a61 XL |
5174 | |
5175 | return 0; | |
5176 | } | |
5177 | ||
5178 | info->sctpi_tag = asoc->c.my_vtag; | |
5179 | info->sctpi_state = asoc->state; | |
5180 | info->sctpi_rwnd = asoc->a_rwnd; | |
5181 | info->sctpi_unackdata = asoc->unack_data; | |
5182 | info->sctpi_penddata = sctp_tsnmap_pending(&asoc->peer.tsn_map); | |
cee360ab XL |
5183 | info->sctpi_instrms = asoc->stream.incnt; |
5184 | info->sctpi_outstrms = asoc->stream.outcnt; | |
52c52a61 XL |
5185 | list_for_each(pos, &asoc->base.inqueue.in_chunk_list) |
5186 | info->sctpi_inqueue++; | |
5187 | list_for_each(pos, &asoc->outqueue.out_chunk_list) | |
5188 | info->sctpi_outqueue++; | |
5189 | info->sctpi_overall_error = asoc->overall_error_count; | |
5190 | info->sctpi_max_burst = asoc->max_burst; | |
5191 | info->sctpi_maxseg = asoc->frag_point; | |
5192 | info->sctpi_peer_rwnd = asoc->peer.rwnd; | |
5193 | info->sctpi_peer_tag = asoc->c.peer_vtag; | |
5194 | ||
ab4f1e28 XL |
5195 | mask = asoc->peer.intl_capable << 1; |
5196 | mask = (mask | asoc->peer.ecn_capable) << 1; | |
52c52a61 XL |
5197 | mask = (mask | asoc->peer.ipv4_address) << 1; |
5198 | mask = (mask | asoc->peer.ipv6_address) << 1; | |
ab4f1e28 | 5199 | mask = (mask | asoc->peer.reconf_capable) << 1; |
52c52a61 XL |
5200 | mask = (mask | asoc->peer.asconf_capable) << 1; |
5201 | mask = (mask | asoc->peer.prsctp_capable) << 1; | |
5202 | mask = (mask | asoc->peer.auth_capable); | |
5203 | info->sctpi_peer_capable = mask; | |
5204 | mask = asoc->peer.sack_needed << 1; | |
5205 | mask = (mask | asoc->peer.sack_generation) << 1; | |
5206 | mask = (mask | asoc->peer.zero_window_announced); | |
5207 | info->sctpi_peer_sack = mask; | |
5208 | ||
5209 | info->sctpi_isacks = asoc->stats.isacks; | |
5210 | info->sctpi_osacks = asoc->stats.osacks; | |
5211 | info->sctpi_opackets = asoc->stats.opackets; | |
5212 | info->sctpi_ipackets = asoc->stats.ipackets; | |
5213 | info->sctpi_rtxchunks = asoc->stats.rtxchunks; | |
5214 | info->sctpi_outofseqtsns = asoc->stats.outofseqtsns; | |
5215 | info->sctpi_idupchunks = asoc->stats.idupchunks; | |
5216 | info->sctpi_gapcnt = asoc->stats.gapcnt; | |
5217 | info->sctpi_ouodchunks = asoc->stats.ouodchunks; | |
5218 | info->sctpi_iuodchunks = asoc->stats.iuodchunks; | |
5219 | info->sctpi_oodchunks = asoc->stats.oodchunks; | |
5220 | info->sctpi_iodchunks = asoc->stats.iodchunks; | |
5221 | info->sctpi_octrlchunks = asoc->stats.octrlchunks; | |
5222 | info->sctpi_ictrlchunks = asoc->stats.ictrlchunks; | |
5223 | ||
5224 | prim = asoc->peer.primary_path; | |
ee6c88bb | 5225 | memcpy(&info->sctpi_p_address, &prim->ipaddr, sizeof(prim->ipaddr)); |
52c52a61 XL |
5226 | info->sctpi_p_state = prim->state; |
5227 | info->sctpi_p_cwnd = prim->cwnd; | |
5228 | info->sctpi_p_srtt = prim->srtt; | |
5229 | info->sctpi_p_rto = jiffies_to_msecs(prim->rto); | |
5230 | info->sctpi_p_hbinterval = prim->hbinterval; | |
5231 | info->sctpi_p_pathmaxrxt = prim->pathmaxrxt; | |
5232 | info->sctpi_p_sackdelay = jiffies_to_msecs(prim->sackdelay); | |
5233 | info->sctpi_p_ssthresh = prim->ssthresh; | |
5234 | info->sctpi_p_partial_bytes_acked = prim->partial_bytes_acked; | |
5235 | info->sctpi_p_flight_size = prim->flight_size; | |
5236 | info->sctpi_p_error = prim->error_count; | |
5237 | ||
5238 | return 0; | |
5239 | } | |
5240 | EXPORT_SYMBOL_GPL(sctp_get_sctp_info); | |
5241 | ||
626d16f5 | 5242 | /* use callback to avoid exporting the core structure */ |
6c72b774 | 5243 | void sctp_transport_walk_start(struct rhashtable_iter *iter) __acquires(RCU) |
626d16f5 | 5244 | { |
7fda702f | 5245 | rhltable_walk_enter(&sctp_transport_hashtable, iter); |
626d16f5 | 5246 | |
97a6ec4a | 5247 | rhashtable_walk_start(iter); |
626d16f5 XL |
5248 | } |
5249 | ||
b77b4f63 | 5250 | void sctp_transport_walk_stop(struct rhashtable_iter *iter) __releases(RCU) |
626d16f5 XL |
5251 | { |
5252 | rhashtable_walk_stop(iter); | |
5253 | rhashtable_walk_exit(iter); | |
5254 | } | |
5255 | ||
5256 | struct sctp_transport *sctp_transport_get_next(struct net *net, | |
5257 | struct rhashtable_iter *iter) | |
5258 | { | |
5259 | struct sctp_transport *t; | |
5260 | ||
5261 | t = rhashtable_walk_next(iter); | |
5262 | for (; t; t = rhashtable_walk_next(iter)) { | |
5263 | if (IS_ERR(t)) { | |
5264 | if (PTR_ERR(t) == -EAGAIN) | |
5265 | continue; | |
5266 | break; | |
5267 | } | |
5268 | ||
bab1be79 XL |
5269 | if (!sctp_transport_hold(t)) |
5270 | continue; | |
5271 | ||
4e7696d9 | 5272 | if (net_eq(t->asoc->base.net, net) && |
626d16f5 XL |
5273 | t->asoc->peer.primary_path == t) |
5274 | break; | |
bab1be79 XL |
5275 | |
5276 | sctp_transport_put(t); | |
626d16f5 XL |
5277 | } |
5278 | ||
5279 | return t; | |
5280 | } | |
5281 | ||
5282 | struct sctp_transport *sctp_transport_get_idx(struct net *net, | |
5283 | struct rhashtable_iter *iter, | |
5284 | int pos) | |
5285 | { | |
bab1be79 | 5286 | struct sctp_transport *t; |
626d16f5 | 5287 | |
bab1be79 XL |
5288 | if (!pos) |
5289 | return SEQ_START_TOKEN; | |
626d16f5 | 5290 | |
bab1be79 XL |
5291 | while ((t = sctp_transport_get_next(net, iter)) && !IS_ERR(t)) { |
5292 | if (!--pos) | |
5293 | break; | |
5294 | sctp_transport_put(t); | |
5295 | } | |
5296 | ||
5297 | return t; | |
626d16f5 XL |
5298 | } |
5299 | ||
5300 | int sctp_for_each_endpoint(int (*cb)(struct sctp_endpoint *, void *), | |
5301 | void *p) { | |
5302 | int err = 0; | |
5303 | int hash = 0; | |
3d3b2f57 | 5304 | struct sctp_endpoint *ep; |
626d16f5 XL |
5305 | struct sctp_hashbucket *head; |
5306 | ||
5307 | for (head = sctp_ep_hashtable; hash < sctp_ep_hashsize; | |
5308 | hash++, head++) { | |
581409da | 5309 | read_lock_bh(&head->lock); |
3d3b2f57 XL |
5310 | sctp_for_each_hentry(ep, &head->chain) { |
5311 | err = cb(ep, p); | |
626d16f5 XL |
5312 | if (err) |
5313 | break; | |
5314 | } | |
581409da | 5315 | read_unlock_bh(&head->lock); |
626d16f5 XL |
5316 | } |
5317 | ||
5318 | return err; | |
5319 | } | |
5320 | EXPORT_SYMBOL_GPL(sctp_for_each_endpoint); | |
5321 | ||
f9d31c4c | 5322 | int sctp_transport_lookup_process(sctp_callback_t cb, struct net *net, |
626d16f5 | 5323 | const union sctp_addr *laddr, |
0af03170 | 5324 | const union sctp_addr *paddr, void *p, int dif) |
626d16f5 XL |
5325 | { |
5326 | struct sctp_transport *transport; | |
f9d31c4c XL |
5327 | struct sctp_endpoint *ep; |
5328 | int err = -ENOENT; | |
626d16f5 XL |
5329 | |
5330 | rcu_read_lock(); | |
0af03170 | 5331 | transport = sctp_addrs_lookup_transport(net, laddr, paddr, dif, dif); |
f9d31c4c XL |
5332 | if (!transport) { |
5333 | rcu_read_unlock(); | |
5334 | return err; | |
5335 | } | |
5336 | ep = transport->asoc->ep; | |
5337 | if (!sctp_endpoint_hold(ep)) { /* asoc can be peeled off */ | |
5338 | sctp_transport_put(transport); | |
5339 | rcu_read_unlock(); | |
5340 | return err; | |
5341 | } | |
08abb795 | 5342 | rcu_read_unlock(); |
1cceda78 | 5343 | |
f9d31c4c XL |
5344 | err = cb(ep, transport, p); |
5345 | sctp_endpoint_put(ep); | |
cd26da4f | 5346 | sctp_transport_put(transport); |
626d16f5 XL |
5347 | return err; |
5348 | } | |
5349 | EXPORT_SYMBOL_GPL(sctp_transport_lookup_process); | |
5350 | ||
5ec7d18d XL |
5351 | int sctp_transport_traverse_process(sctp_callback_t cb, sctp_callback_t cb_done, |
5352 | struct net *net, int *pos, void *p) | |
5353 | { | |
626d16f5 | 5354 | struct rhashtable_iter hti; |
d25adbeb | 5355 | struct sctp_transport *tsp; |
5ec7d18d | 5356 | struct sctp_endpoint *ep; |
d25adbeb | 5357 | int ret; |
626d16f5 | 5358 | |
d25adbeb | 5359 | again: |
f53d77e1 | 5360 | ret = 0; |
97a6ec4a | 5361 | sctp_transport_walk_start(&hti); |
626d16f5 | 5362 | |
d25adbeb XL |
5363 | tsp = sctp_transport_get_idx(net, &hti, *pos + 1); |
5364 | for (; !IS_ERR_OR_NULL(tsp); tsp = sctp_transport_get_next(net, &hti)) { | |
5ec7d18d XL |
5365 | ep = tsp->asoc->ep; |
5366 | if (sctp_endpoint_hold(ep)) { /* asoc can be peeled off */ | |
5367 | ret = cb(ep, tsp, p); | |
5368 | if (ret) | |
5369 | break; | |
5370 | sctp_endpoint_put(ep); | |
5371 | } | |
d25adbeb XL |
5372 | (*pos)++; |
5373 | sctp_transport_put(tsp); | |
626d16f5 | 5374 | } |
626d16f5 | 5375 | sctp_transport_walk_stop(&hti); |
53fa1036 | 5376 | |
d25adbeb | 5377 | if (ret) { |
5ec7d18d | 5378 | if (cb_done && !cb_done(ep, tsp, p)) { |
d25adbeb | 5379 | (*pos)++; |
5ec7d18d | 5380 | sctp_endpoint_put(ep); |
d25adbeb XL |
5381 | sctp_transport_put(tsp); |
5382 | goto again; | |
5383 | } | |
5ec7d18d | 5384 | sctp_endpoint_put(ep); |
d25adbeb XL |
5385 | sctp_transport_put(tsp); |
5386 | } | |
5387 | ||
5388 | return ret; | |
626d16f5 | 5389 | } |
5ec7d18d | 5390 | EXPORT_SYMBOL_GPL(sctp_transport_traverse_process); |
626d16f5 | 5391 | |
1da177e4 LT |
5392 | /* 7.2.1 Association Status (SCTP_STATUS) |
5393 | ||
5394 | * Applications can retrieve current status information about an | |
5395 | * association, including association state, peer receiver window size, | |
5396 | * number of unacked data chunks, and number of data chunks pending | |
5397 | * receipt. This information is read-only. | |
5398 | */ | |
5399 | static int sctp_getsockopt_sctp_status(struct sock *sk, int len, | |
5400 | char __user *optval, | |
5401 | int __user *optlen) | |
5402 | { | |
5403 | struct sctp_status status; | |
5404 | struct sctp_association *asoc = NULL; | |
5405 | struct sctp_transport *transport; | |
5406 | sctp_assoc_t associd; | |
5407 | int retval = 0; | |
5408 | ||
408f22e8 | 5409 | if (len < sizeof(status)) { |
1da177e4 LT |
5410 | retval = -EINVAL; |
5411 | goto out; | |
5412 | } | |
5413 | ||
408f22e8 NH |
5414 | len = sizeof(status); |
5415 | if (copy_from_user(&status, optval, len)) { | |
1da177e4 LT |
5416 | retval = -EFAULT; |
5417 | goto out; | |
5418 | } | |
5419 | ||
5420 | associd = status.sstat_assoc_id; | |
5421 | asoc = sctp_id2assoc(sk, associd); | |
5422 | if (!asoc) { | |
5423 | retval = -EINVAL; | |
5424 | goto out; | |
5425 | } | |
5426 | ||
5427 | transport = asoc->peer.primary_path; | |
5428 | ||
5429 | status.sstat_assoc_id = sctp_assoc2id(asoc); | |
38ab1fa9 | 5430 | status.sstat_state = sctp_assoc_to_state(asoc); |
1da177e4 LT |
5431 | status.sstat_rwnd = asoc->peer.rwnd; |
5432 | status.sstat_unackdata = asoc->unack_data; | |
5433 | ||
5434 | status.sstat_penddata = sctp_tsnmap_pending(&asoc->peer.tsn_map); | |
cee360ab XL |
5435 | status.sstat_instrms = asoc->stream.incnt; |
5436 | status.sstat_outstrms = asoc->stream.outcnt; | |
1da177e4 LT |
5437 | status.sstat_fragmentation_point = asoc->frag_point; |
5438 | status.sstat_primary.spinfo_assoc_id = sctp_assoc2id(transport->asoc); | |
8cec6b80 AV |
5439 | memcpy(&status.sstat_primary.spinfo_address, &transport->ipaddr, |
5440 | transport->af_specific->sockaddr_len); | |
1da177e4 | 5441 | /* Map ipv4 address into v4-mapped-on-v6 address. */ |
299ee123 | 5442 | sctp_get_pf_specific(sk->sk_family)->addr_to_user(sctp_sk(sk), |
1da177e4 | 5443 | (union sctp_addr *)&status.sstat_primary.spinfo_address); |
3f7a87d2 | 5444 | status.sstat_primary.spinfo_state = transport->state; |
1da177e4 LT |
5445 | status.sstat_primary.spinfo_cwnd = transport->cwnd; |
5446 | status.sstat_primary.spinfo_srtt = transport->srtt; | |
5447 | status.sstat_primary.spinfo_rto = jiffies_to_msecs(transport->rto); | |
52ccb8e9 | 5448 | status.sstat_primary.spinfo_mtu = transport->pathmtu; |
1da177e4 | 5449 | |
3f7a87d2 FF |
5450 | if (status.sstat_primary.spinfo_state == SCTP_UNKNOWN) |
5451 | status.sstat_primary.spinfo_state = SCTP_ACTIVE; | |
5452 | ||
1da177e4 LT |
5453 | if (put_user(len, optlen)) { |
5454 | retval = -EFAULT; | |
5455 | goto out; | |
5456 | } | |
5457 | ||
bb33381d DB |
5458 | pr_debug("%s: len:%d, state:%d, rwnd:%d, assoc_id:%d\n", |
5459 | __func__, len, status.sstat_state, status.sstat_rwnd, | |
5460 | status.sstat_assoc_id); | |
1da177e4 LT |
5461 | |
5462 | if (copy_to_user(optval, &status, len)) { | |
5463 | retval = -EFAULT; | |
5464 | goto out; | |
5465 | } | |
5466 | ||
5467 | out: | |
a02cec21 | 5468 | return retval; |
1da177e4 LT |
5469 | } |
5470 | ||
5471 | ||
5472 | /* 7.2.2 Peer Address Information (SCTP_GET_PEER_ADDR_INFO) | |
5473 | * | |
5474 | * Applications can retrieve information about a specific peer address | |
5475 | * of an association, including its reachability state, congestion | |
5476 | * window, and retransmission timer values. This information is | |
5477 | * read-only. | |
5478 | */ | |
5479 | static int sctp_getsockopt_peer_addr_info(struct sock *sk, int len, | |
5480 | char __user *optval, | |
5481 | int __user *optlen) | |
5482 | { | |
5483 | struct sctp_paddrinfo pinfo; | |
5484 | struct sctp_transport *transport; | |
5485 | int retval = 0; | |
5486 | ||
408f22e8 | 5487 | if (len < sizeof(pinfo)) { |
1da177e4 LT |
5488 | retval = -EINVAL; |
5489 | goto out; | |
5490 | } | |
5491 | ||
408f22e8 NH |
5492 | len = sizeof(pinfo); |
5493 | if (copy_from_user(&pinfo, optval, len)) { | |
1da177e4 LT |
5494 | retval = -EFAULT; |
5495 | goto out; | |
5496 | } | |
5497 | ||
5498 | transport = sctp_addr_id2transport(sk, &pinfo.spinfo_address, | |
5499 | pinfo.spinfo_assoc_id); | |
aef587be XL |
5500 | if (!transport) { |
5501 | retval = -EINVAL; | |
5502 | goto out; | |
5503 | } | |
5504 | ||
5505 | if (transport->state == SCTP_PF && | |
5506 | transport->asoc->pf_expose == SCTP_PF_EXPOSE_DISABLE) { | |
5507 | retval = -EACCES; | |
5508 | goto out; | |
5509 | } | |
1da177e4 LT |
5510 | |
5511 | pinfo.spinfo_assoc_id = sctp_assoc2id(transport->asoc); | |
3f7a87d2 | 5512 | pinfo.spinfo_state = transport->state; |
1da177e4 LT |
5513 | pinfo.spinfo_cwnd = transport->cwnd; |
5514 | pinfo.spinfo_srtt = transport->srtt; | |
5515 | pinfo.spinfo_rto = jiffies_to_msecs(transport->rto); | |
52ccb8e9 | 5516 | pinfo.spinfo_mtu = transport->pathmtu; |
1da177e4 | 5517 | |
3f7a87d2 FF |
5518 | if (pinfo.spinfo_state == SCTP_UNKNOWN) |
5519 | pinfo.spinfo_state = SCTP_ACTIVE; | |
5520 | ||
1da177e4 LT |
5521 | if (put_user(len, optlen)) { |
5522 | retval = -EFAULT; | |
5523 | goto out; | |
5524 | } | |
5525 | ||
5526 | if (copy_to_user(optval, &pinfo, len)) { | |
5527 | retval = -EFAULT; | |
5528 | goto out; | |
5529 | } | |
5530 | ||
5531 | out: | |
a02cec21 | 5532 | return retval; |
1da177e4 LT |
5533 | } |
5534 | ||
5535 | /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS) | |
5536 | * | |
5537 | * This option is a on/off flag. If enabled no SCTP message | |
5538 | * fragmentation will be performed. Instead if a message being sent | |
5539 | * exceeds the current PMTU size, the message will NOT be sent and | |
5540 | * instead a error will be indicated to the user. | |
5541 | */ | |
5542 | static int sctp_getsockopt_disable_fragments(struct sock *sk, int len, | |
5543 | char __user *optval, int __user *optlen) | |
5544 | { | |
5545 | int val; | |
5546 | ||
5547 | if (len < sizeof(int)) | |
5548 | return -EINVAL; | |
5549 | ||
5550 | len = sizeof(int); | |
5551 | val = (sctp_sk(sk)->disable_fragments == 1); | |
5552 | if (put_user(len, optlen)) | |
5553 | return -EFAULT; | |
5554 | if (copy_to_user(optval, &val, len)) | |
5555 | return -EFAULT; | |
5556 | return 0; | |
5557 | } | |
5558 | ||
5559 | /* 7.1.15 Set notification and ancillary events (SCTP_EVENTS) | |
5560 | * | |
5561 | * This socket option is used to specify various notifications and | |
5562 | * ancillary data the user wishes to receive. | |
5563 | */ | |
5564 | static int sctp_getsockopt_events(struct sock *sk, int len, char __user *optval, | |
5565 | int __user *optlen) | |
5566 | { | |
2cc0eeb6 XL |
5567 | struct sctp_event_subscribe subscribe; |
5568 | __u8 *sn_type = (__u8 *)&subscribe; | |
5569 | int i; | |
5570 | ||
a4b8e71b | 5571 | if (len == 0) |
1da177e4 | 5572 | return -EINVAL; |
acdd5985 TG |
5573 | if (len > sizeof(struct sctp_event_subscribe)) |
5574 | len = sizeof(struct sctp_event_subscribe); | |
408f22e8 NH |
5575 | if (put_user(len, optlen)) |
5576 | return -EFAULT; | |
2cc0eeb6 XL |
5577 | |
5578 | for (i = 0; i < len; i++) | |
5579 | sn_type[i] = sctp_ulpevent_type_enabled(sctp_sk(sk)->subscribe, | |
5580 | SCTP_SN_TYPE_BASE + i); | |
5581 | ||
5582 | if (copy_to_user(optval, &subscribe, len)) | |
1da177e4 | 5583 | return -EFAULT; |
2cc0eeb6 | 5584 | |
1da177e4 LT |
5585 | return 0; |
5586 | } | |
5587 | ||
5588 | /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE) | |
5589 | * | |
5590 | * This socket option is applicable to the UDP-style socket only. When | |
5591 | * set it will cause associations that are idle for more than the | |
5592 | * specified number of seconds to automatically close. An association | |
5593 | * being idle is defined an association that has NOT sent or received | |
5594 | * user data. The special value of '0' indicates that no automatic | |
5595 | * close of any associations should be performed. The option expects an | |
5596 | * integer defining the number of seconds of idle time before an | |
5597 | * association is closed. | |
5598 | */ | |
5599 | static int sctp_getsockopt_autoclose(struct sock *sk, int len, char __user *optval, int __user *optlen) | |
5600 | { | |
5601 | /* Applicable to UDP-style socket only */ | |
5602 | if (sctp_style(sk, TCP)) | |
5603 | return -EOPNOTSUPP; | |
408f22e8 | 5604 | if (len < sizeof(int)) |
1da177e4 | 5605 | return -EINVAL; |
408f22e8 NH |
5606 | len = sizeof(int); |
5607 | if (put_user(len, optlen)) | |
5608 | return -EFAULT; | |
b2ce04c2 | 5609 | if (put_user(sctp_sk(sk)->autoclose, (int __user *)optval)) |
1da177e4 LT |
5610 | return -EFAULT; |
5611 | return 0; | |
5612 | } | |
5613 | ||
5614 | /* Helper routine to branch off an association to a new socket. */ | |
0343c554 | 5615 | int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp) |
1da177e4 | 5616 | { |
0343c554 | 5617 | struct sctp_association *asoc = sctp_id2assoc(sk, id); |
299ee123 | 5618 | struct sctp_sock *sp = sctp_sk(sk); |
1da177e4 LT |
5619 | struct socket *sock; |
5620 | int err = 0; | |
5621 | ||
df80cd9b XL |
5622 | /* Do not peel off from one netns to another one. */ |
5623 | if (!net_eq(current->nsproxy->net_ns, sock_net(sk))) | |
5624 | return -EINVAL; | |
5625 | ||
0343c554 BP |
5626 | if (!asoc) |
5627 | return -EINVAL; | |
5628 | ||
1da177e4 LT |
5629 | /* An association cannot be branched off from an already peeled-off |
5630 | * socket, nor is this supported for tcp style sockets. | |
5631 | */ | |
5632 | if (!sctp_style(sk, UDP)) | |
5633 | return -EINVAL; | |
5634 | ||
5635 | /* Create a new socket. */ | |
5636 | err = sock_create(sk->sk_family, SOCK_SEQPACKET, IPPROTO_SCTP, &sock); | |
5637 | if (err < 0) | |
5638 | return err; | |
5639 | ||
914e1c8b | 5640 | sctp_copy_sock(sock->sk, sk, asoc); |
4f444308 VY |
5641 | |
5642 | /* Make peeled-off sockets more like 1-1 accepted sockets. | |
b7e10c25 RH |
5643 | * Set the daddr and initialize id to something more random and also |
5644 | * copy over any ip options. | |
4f444308 | 5645 | */ |
8467dda0 | 5646 | sp->pf->to_sk_daddr(&asoc->peer.primary_addr, sock->sk); |
b7e10c25 | 5647 | sp->pf->copy_ip_options(sk, sock->sk); |
914e1c8b VY |
5648 | |
5649 | /* Populate the fields of the newsk from the oldsk and migrate the | |
5650 | * asoc to the newsk. | |
5651 | */ | |
89664c62 XL |
5652 | err = sctp_sock_migrate(sk, sock->sk, asoc, |
5653 | SCTP_SOCKET_UDP_HIGH_BANDWIDTH); | |
5654 | if (err) { | |
5655 | sock_release(sock); | |
5656 | sock = NULL; | |
5657 | } | |
4f444308 | 5658 | |
1da177e4 LT |
5659 | *sockp = sock; |
5660 | ||
5661 | return err; | |
5662 | } | |
0343c554 | 5663 | EXPORT_SYMBOL(sctp_do_peeloff); |
1da177e4 | 5664 | |
2cb5c8e3 NH |
5665 | static int sctp_getsockopt_peeloff_common(struct sock *sk, sctp_peeloff_arg_t *peeloff, |
5666 | struct file **newfile, unsigned flags) | |
5667 | { | |
5668 | struct socket *newsock; | |
5669 | int retval; | |
5670 | ||
5671 | retval = sctp_do_peeloff(sk, peeloff->associd, &newsock); | |
5672 | if (retval < 0) | |
5673 | goto out; | |
5674 | ||
5675 | /* Map the socket to an unused fd that can be returned to the user. */ | |
5676 | retval = get_unused_fd_flags(flags & SOCK_CLOEXEC); | |
5677 | if (retval < 0) { | |
5678 | sock_release(newsock); | |
5679 | goto out; | |
5680 | } | |
5681 | ||
5682 | *newfile = sock_alloc_file(newsock, 0, NULL); | |
5683 | if (IS_ERR(*newfile)) { | |
5684 | put_unused_fd(retval); | |
2cb5c8e3 NH |
5685 | retval = PTR_ERR(*newfile); |
5686 | *newfile = NULL; | |
5687 | return retval; | |
5688 | } | |
5689 | ||
5690 | pr_debug("%s: sk:%p, newsk:%p, sd:%d\n", __func__, sk, newsock->sk, | |
5691 | retval); | |
5692 | ||
5693 | peeloff->sd = retval; | |
5694 | ||
5695 | if (flags & SOCK_NONBLOCK) | |
5696 | (*newfile)->f_flags |= O_NONBLOCK; | |
5697 | out: | |
5698 | return retval; | |
5699 | } | |
5700 | ||
1da177e4 LT |
5701 | static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval, int __user *optlen) |
5702 | { | |
5703 | sctp_peeloff_arg_t peeloff; | |
2cb5c8e3 | 5704 | struct file *newfile = NULL; |
1da177e4 | 5705 | int retval = 0; |
1da177e4 | 5706 | |
408f22e8 | 5707 | if (len < sizeof(sctp_peeloff_arg_t)) |
1da177e4 | 5708 | return -EINVAL; |
408f22e8 | 5709 | len = sizeof(sctp_peeloff_arg_t); |
1da177e4 LT |
5710 | if (copy_from_user(&peeloff, optval, len)) |
5711 | return -EFAULT; | |
5712 | ||
2cb5c8e3 | 5713 | retval = sctp_getsockopt_peeloff_common(sk, &peeloff, &newfile, 0); |
1da177e4 LT |
5714 | if (retval < 0) |
5715 | goto out; | |
5716 | ||
2cb5c8e3 NH |
5717 | /* Return the fd mapped to the new socket. */ |
5718 | if (put_user(len, optlen)) { | |
5719 | fput(newfile); | |
5720 | put_unused_fd(retval); | |
5721 | return -EFAULT; | |
1da177e4 LT |
5722 | } |
5723 | ||
2cb5c8e3 NH |
5724 | if (copy_to_user(optval, &peeloff, len)) { |
5725 | fput(newfile); | |
56b31d1c | 5726 | put_unused_fd(retval); |
2cb5c8e3 | 5727 | return -EFAULT; |
56b31d1c | 5728 | } |
2cb5c8e3 NH |
5729 | fd_install(retval, newfile); |
5730 | out: | |
5731 | return retval; | |
5732 | } | |
56b31d1c | 5733 | |
2cb5c8e3 NH |
5734 | static int sctp_getsockopt_peeloff_flags(struct sock *sk, int len, |
5735 | char __user *optval, int __user *optlen) | |
5736 | { | |
5737 | sctp_peeloff_flags_arg_t peeloff; | |
5738 | struct file *newfile = NULL; | |
5739 | int retval = 0; | |
5740 | ||
5741 | if (len < sizeof(sctp_peeloff_flags_arg_t)) | |
5742 | return -EINVAL; | |
5743 | len = sizeof(sctp_peeloff_flags_arg_t); | |
5744 | if (copy_from_user(&peeloff, optval, len)) | |
5745 | return -EFAULT; | |
5746 | ||
5747 | retval = sctp_getsockopt_peeloff_common(sk, &peeloff.p_arg, | |
5748 | &newfile, peeloff.flags); | |
5749 | if (retval < 0) | |
5750 | goto out; | |
1da177e4 LT |
5751 | |
5752 | /* Return the fd mapped to the new socket. */ | |
56b31d1c AV |
5753 | if (put_user(len, optlen)) { |
5754 | fput(newfile); | |
5755 | put_unused_fd(retval); | |
5756 | return -EFAULT; | |
5757 | } | |
2cb5c8e3 | 5758 | |
56b31d1c AV |
5759 | if (copy_to_user(optval, &peeloff, len)) { |
5760 | fput(newfile); | |
5761 | put_unused_fd(retval); | |
408f22e8 | 5762 | return -EFAULT; |
56b31d1c AV |
5763 | } |
5764 | fd_install(retval, newfile); | |
1da177e4 LT |
5765 | out: |
5766 | return retval; | |
5767 | } | |
5768 | ||
5769 | /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS) | |
5770 | * | |
5771 | * Applications can enable or disable heartbeats for any peer address of | |
5772 | * an association, modify an address's heartbeat interval, force a | |
5773 | * heartbeat to be sent immediately, and adjust the address's maximum | |
5774 | * number of retransmissions sent before an address is considered | |
5775 | * unreachable. The following structure is used to access and modify an | |
5776 | * address's parameters: | |
5777 | * | |
5778 | * struct sctp_paddrparams { | |
52ccb8e9 FF |
5779 | * sctp_assoc_t spp_assoc_id; |
5780 | * struct sockaddr_storage spp_address; | |
5781 | * uint32_t spp_hbinterval; | |
5782 | * uint16_t spp_pathmaxrxt; | |
5783 | * uint32_t spp_pathmtu; | |
5784 | * uint32_t spp_sackdelay; | |
5785 | * uint32_t spp_flags; | |
5786 | * }; | |
5787 | * | |
5788 | * spp_assoc_id - (one-to-many style socket) This is filled in the | |
5789 | * application, and identifies the association for | |
5790 | * this query. | |
1da177e4 LT |
5791 | * spp_address - This specifies which address is of interest. |
5792 | * spp_hbinterval - This contains the value of the heartbeat interval, | |
52ccb8e9 FF |
5793 | * in milliseconds. If a value of zero |
5794 | * is present in this field then no changes are to | |
5795 | * be made to this parameter. | |
1da177e4 LT |
5796 | * spp_pathmaxrxt - This contains the maximum number of |
5797 | * retransmissions before this address shall be | |
52ccb8e9 FF |
5798 | * considered unreachable. If a value of zero |
5799 | * is present in this field then no changes are to | |
5800 | * be made to this parameter. | |
5801 | * spp_pathmtu - When Path MTU discovery is disabled the value | |
5802 | * specified here will be the "fixed" path mtu. | |
5803 | * Note that if the spp_address field is empty | |
5804 | * then all associations on this address will | |
5805 | * have this fixed path mtu set upon them. | |
5806 | * | |
5807 | * spp_sackdelay - When delayed sack is enabled, this value specifies | |
5808 | * the number of milliseconds that sacks will be delayed | |
5809 | * for. This value will apply to all addresses of an | |
5810 | * association if the spp_address field is empty. Note | |
5811 | * also, that if delayed sack is enabled and this | |
5812 | * value is set to 0, no change is made to the last | |
5813 | * recorded delayed sack timer value. | |
5814 | * | |
5815 | * spp_flags - These flags are used to control various features | |
5816 | * on an association. The flag field may contain | |
5817 | * zero or more of the following options. | |
5818 | * | |
5819 | * SPP_HB_ENABLE - Enable heartbeats on the | |
5820 | * specified address. Note that if the address | |
5821 | * field is empty all addresses for the association | |
5822 | * have heartbeats enabled upon them. | |
5823 | * | |
5824 | * SPP_HB_DISABLE - Disable heartbeats on the | |
5825 | * speicifed address. Note that if the address | |
5826 | * field is empty all addresses for the association | |
5827 | * will have their heartbeats disabled. Note also | |
5828 | * that SPP_HB_ENABLE and SPP_HB_DISABLE are | |
5829 | * mutually exclusive, only one of these two should | |
5830 | * be specified. Enabling both fields will have | |
5831 | * undetermined results. | |
5832 | * | |
5833 | * SPP_HB_DEMAND - Request a user initiated heartbeat | |
5834 | * to be made immediately. | |
5835 | * | |
5836 | * SPP_PMTUD_ENABLE - This field will enable PMTU | |
5837 | * discovery upon the specified address. Note that | |
5838 | * if the address feild is empty then all addresses | |
5839 | * on the association are effected. | |
5840 | * | |
5841 | * SPP_PMTUD_DISABLE - This field will disable PMTU | |
5842 | * discovery upon the specified address. Note that | |
5843 | * if the address feild is empty then all addresses | |
5844 | * on the association are effected. Not also that | |
5845 | * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually | |
5846 | * exclusive. Enabling both will have undetermined | |
5847 | * results. | |
5848 | * | |
5849 | * SPP_SACKDELAY_ENABLE - Setting this flag turns | |
5850 | * on delayed sack. The time specified in spp_sackdelay | |
5851 | * is used to specify the sack delay for this address. Note | |
5852 | * that if spp_address is empty then all addresses will | |
5853 | * enable delayed sack and take on the sack delay | |
5854 | * value specified in spp_sackdelay. | |
5855 | * SPP_SACKDELAY_DISABLE - Setting this flag turns | |
5856 | * off delayed sack. If the spp_address field is blank then | |
5857 | * delayed sack is disabled for the entire association. Note | |
5858 | * also that this field is mutually exclusive to | |
5859 | * SPP_SACKDELAY_ENABLE, setting both will have undefined | |
5860 | * results. | |
0b0dce7a XL |
5861 | * |
5862 | * SPP_IPV6_FLOWLABEL: Setting this flag enables the | |
5863 | * setting of the IPV6 flow label value. The value is | |
5864 | * contained in the spp_ipv6_flowlabel field. | |
5865 | * Upon retrieval, this flag will be set to indicate that | |
5866 | * the spp_ipv6_flowlabel field has a valid value returned. | |
5867 | * If a specific destination address is set (in the | |
5868 | * spp_address field), then the value returned is that of | |
5869 | * the address. If just an association is specified (and | |
5870 | * no address), then the association's default flow label | |
5871 | * is returned. If neither an association nor a destination | |
5872 | * is specified, then the socket's default flow label is | |
5873 | * returned. For non-IPv6 sockets, this flag will be left | |
5874 | * cleared. | |
5875 | * | |
5876 | * SPP_DSCP: Setting this flag enables the setting of the | |
5877 | * Differentiated Services Code Point (DSCP) value | |
5878 | * associated with either the association or a specific | |
5879 | * address. The value is obtained in the spp_dscp field. | |
5880 | * Upon retrieval, this flag will be set to indicate that | |
5881 | * the spp_dscp field has a valid value returned. If a | |
5882 | * specific destination address is set when called (in the | |
5883 | * spp_address field), then that specific destination | |
5884 | * address's DSCP value is returned. If just an association | |
5885 | * is specified, then the association's default DSCP is | |
5886 | * returned. If neither an association nor a destination is | |
5887 | * specified, then the socket's default DSCP is returned. | |
5888 | * | |
5889 | * spp_ipv6_flowlabel | |
5890 | * - This field is used in conjunction with the | |
5891 | * SPP_IPV6_FLOWLABEL flag and contains the IPv6 flow label. | |
5892 | * The 20 least significant bits are used for the flow | |
5893 | * label. This setting has precedence over any IPv6-layer | |
5894 | * setting. | |
5895 | * | |
5896 | * spp_dscp - This field is used in conjunction with the SPP_DSCP flag | |
5897 | * and contains the DSCP. The 6 most significant bits are | |
5898 | * used for the DSCP. This setting has precedence over any | |
5899 | * IPv4- or IPv6- layer setting. | |
1da177e4 LT |
5900 | */ |
5901 | static int sctp_getsockopt_peer_addr_params(struct sock *sk, int len, | |
52ccb8e9 | 5902 | char __user *optval, int __user *optlen) |
1da177e4 | 5903 | { |
52ccb8e9 FF |
5904 | struct sctp_paddrparams params; |
5905 | struct sctp_transport *trans = NULL; | |
5906 | struct sctp_association *asoc = NULL; | |
5907 | struct sctp_sock *sp = sctp_sk(sk); | |
1da177e4 | 5908 | |
0b0dce7a XL |
5909 | if (len >= sizeof(params)) |
5910 | len = sizeof(params); | |
5911 | else if (len >= ALIGN(offsetof(struct sctp_paddrparams, | |
5912 | spp_ipv6_flowlabel), 4)) | |
5913 | len = ALIGN(offsetof(struct sctp_paddrparams, | |
5914 | spp_ipv6_flowlabel), 4); | |
5915 | else | |
1da177e4 | 5916 | return -EINVAL; |
0b0dce7a | 5917 | |
1da177e4 LT |
5918 | if (copy_from_user(¶ms, optval, len)) |
5919 | return -EFAULT; | |
5920 | ||
52ccb8e9 FF |
5921 | /* If an address other than INADDR_ANY is specified, and |
5922 | * no transport is found, then the request is invalid. | |
1da177e4 | 5923 | */ |
cb3f837b | 5924 | if (!sctp_is_any(sk, (union sctp_addr *)¶ms.spp_address)) { |
52ccb8e9 FF |
5925 | trans = sctp_addr_id2transport(sk, ¶ms.spp_address, |
5926 | params.spp_assoc_id); | |
5927 | if (!trans) { | |
bb33381d | 5928 | pr_debug("%s: failed no transport\n", __func__); |
52ccb8e9 FF |
5929 | return -EINVAL; |
5930 | } | |
1da177e4 LT |
5931 | } |
5932 | ||
b99e5e02 XL |
5933 | /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the |
5934 | * socket is a one to many style socket, and an association | |
5935 | * was not found, then the id was invalid. | |
52ccb8e9 FF |
5936 | */ |
5937 | asoc = sctp_id2assoc(sk, params.spp_assoc_id); | |
b99e5e02 XL |
5938 | if (!asoc && params.spp_assoc_id != SCTP_FUTURE_ASSOC && |
5939 | sctp_style(sk, UDP)) { | |
bb33381d | 5940 | pr_debug("%s: failed no association\n", __func__); |
1da177e4 | 5941 | return -EINVAL; |
52ccb8e9 | 5942 | } |
1da177e4 | 5943 | |
52ccb8e9 FF |
5944 | if (trans) { |
5945 | /* Fetch transport values. */ | |
5946 | params.spp_hbinterval = jiffies_to_msecs(trans->hbinterval); | |
5947 | params.spp_pathmtu = trans->pathmtu; | |
5948 | params.spp_pathmaxrxt = trans->pathmaxrxt; | |
5949 | params.spp_sackdelay = jiffies_to_msecs(trans->sackdelay); | |
5950 | ||
5951 | /*draft-11 doesn't say what to return in spp_flags*/ | |
5952 | params.spp_flags = trans->param_flags; | |
0b0dce7a XL |
5953 | if (trans->flowlabel & SCTP_FLOWLABEL_SET_MASK) { |
5954 | params.spp_ipv6_flowlabel = trans->flowlabel & | |
5955 | SCTP_FLOWLABEL_VAL_MASK; | |
5956 | params.spp_flags |= SPP_IPV6_FLOWLABEL; | |
5957 | } | |
5958 | if (trans->dscp & SCTP_DSCP_SET_MASK) { | |
5959 | params.spp_dscp = trans->dscp & SCTP_DSCP_VAL_MASK; | |
5960 | params.spp_flags |= SPP_DSCP; | |
5961 | } | |
52ccb8e9 FF |
5962 | } else if (asoc) { |
5963 | /* Fetch association values. */ | |
5964 | params.spp_hbinterval = jiffies_to_msecs(asoc->hbinterval); | |
5965 | params.spp_pathmtu = asoc->pathmtu; | |
5966 | params.spp_pathmaxrxt = asoc->pathmaxrxt; | |
5967 | params.spp_sackdelay = jiffies_to_msecs(asoc->sackdelay); | |
5968 | ||
5969 | /*draft-11 doesn't say what to return in spp_flags*/ | |
5970 | params.spp_flags = asoc->param_flags; | |
0b0dce7a XL |
5971 | if (asoc->flowlabel & SCTP_FLOWLABEL_SET_MASK) { |
5972 | params.spp_ipv6_flowlabel = asoc->flowlabel & | |
5973 | SCTP_FLOWLABEL_VAL_MASK; | |
5974 | params.spp_flags |= SPP_IPV6_FLOWLABEL; | |
5975 | } | |
5976 | if (asoc->dscp & SCTP_DSCP_SET_MASK) { | |
5977 | params.spp_dscp = asoc->dscp & SCTP_DSCP_VAL_MASK; | |
5978 | params.spp_flags |= SPP_DSCP; | |
5979 | } | |
52ccb8e9 FF |
5980 | } else { |
5981 | /* Fetch socket values. */ | |
5982 | params.spp_hbinterval = sp->hbinterval; | |
5983 | params.spp_pathmtu = sp->pathmtu; | |
5984 | params.spp_sackdelay = sp->sackdelay; | |
5985 | params.spp_pathmaxrxt = sp->pathmaxrxt; | |
1da177e4 | 5986 | |
52ccb8e9 FF |
5987 | /*draft-11 doesn't say what to return in spp_flags*/ |
5988 | params.spp_flags = sp->param_flags; | |
0b0dce7a XL |
5989 | if (sp->flowlabel & SCTP_FLOWLABEL_SET_MASK) { |
5990 | params.spp_ipv6_flowlabel = sp->flowlabel & | |
5991 | SCTP_FLOWLABEL_VAL_MASK; | |
5992 | params.spp_flags |= SPP_IPV6_FLOWLABEL; | |
5993 | } | |
5994 | if (sp->dscp & SCTP_DSCP_SET_MASK) { | |
5995 | params.spp_dscp = sp->dscp & SCTP_DSCP_VAL_MASK; | |
5996 | params.spp_flags |= SPP_DSCP; | |
5997 | } | |
52ccb8e9 | 5998 | } |
1da177e4 | 5999 | |
1da177e4 LT |
6000 | if (copy_to_user(optval, ¶ms, len)) |
6001 | return -EFAULT; | |
6002 | ||
6003 | if (put_user(len, optlen)) | |
6004 | return -EFAULT; | |
6005 | ||
6006 | return 0; | |
6007 | } | |
6008 | ||
d364d927 WY |
6009 | /* |
6010 | * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK) | |
6011 | * | |
6012 | * This option will effect the way delayed acks are performed. This | |
6013 | * option allows you to get or set the delayed ack time, in | |
6014 | * milliseconds. It also allows changing the delayed ack frequency. | |
6015 | * Changing the frequency to 1 disables the delayed sack algorithm. If | |
6016 | * the assoc_id is 0, then this sets or gets the endpoints default | |
6017 | * values. If the assoc_id field is non-zero, then the set or get | |
6018 | * effects the specified association for the one to many model (the | |
6019 | * assoc_id field is ignored by the one to one model). Note that if | |
6020 | * sack_delay or sack_freq are 0 when setting this option, then the | |
6021 | * current values will remain unchanged. | |
6022 | * | |
6023 | * struct sctp_sack_info { | |
6024 | * sctp_assoc_t sack_assoc_id; | |
6025 | * uint32_t sack_delay; | |
6026 | * uint32_t sack_freq; | |
6027 | * }; | |
7708610b | 6028 | * |
d364d927 WY |
6029 | * sack_assoc_id - This parameter, indicates which association the user |
6030 | * is performing an action upon. Note that if this field's value is | |
6031 | * zero then the endpoints default value is changed (effecting future | |
6032 | * associations only). | |
7708610b | 6033 | * |
d364d927 WY |
6034 | * sack_delay - This parameter contains the number of milliseconds that |
6035 | * the user is requesting the delayed ACK timer be set to. Note that | |
6036 | * this value is defined in the standard to be between 200 and 500 | |
6037 | * milliseconds. | |
7708610b | 6038 | * |
d364d927 WY |
6039 | * sack_freq - This parameter contains the number of packets that must |
6040 | * be received before a sack is sent without waiting for the delay | |
6041 | * timer to expire. The default value for this is 2, setting this | |
6042 | * value to 1 will disable the delayed sack algorithm. | |
7708610b | 6043 | */ |
d364d927 | 6044 | static int sctp_getsockopt_delayed_ack(struct sock *sk, int len, |
7708610b FF |
6045 | char __user *optval, |
6046 | int __user *optlen) | |
6047 | { | |
d364d927 | 6048 | struct sctp_sack_info params; |
7708610b FF |
6049 | struct sctp_association *asoc = NULL; |
6050 | struct sctp_sock *sp = sctp_sk(sk); | |
6051 | ||
d364d927 WY |
6052 | if (len >= sizeof(struct sctp_sack_info)) { |
6053 | len = sizeof(struct sctp_sack_info); | |
7708610b | 6054 | |
d364d927 WY |
6055 | if (copy_from_user(¶ms, optval, len)) |
6056 | return -EFAULT; | |
6057 | } else if (len == sizeof(struct sctp_assoc_value)) { | |
94f65193 | 6058 | pr_warn_ratelimited(DEPRECATED |
f916ec96 | 6059 | "%s (pid %d) " |
94f65193 | 6060 | "Use of struct sctp_assoc_value in delayed_ack socket option.\n" |
f916ec96 NH |
6061 | "Use struct sctp_sack_info instead\n", |
6062 | current->comm, task_pid_nr(current)); | |
d364d927 WY |
6063 | if (copy_from_user(¶ms, optval, len)) |
6064 | return -EFAULT; | |
6065 | } else | |
cb3f837b | 6066 | return -EINVAL; |
7708610b | 6067 | |
9c5829e1 XL |
6068 | /* Get association, if sack_assoc_id != SCTP_FUTURE_ASSOC and the |
6069 | * socket is a one to many style socket, and an association | |
6070 | * was not found, then the id was invalid. | |
d808ad9a | 6071 | */ |
d364d927 | 6072 | asoc = sctp_id2assoc(sk, params.sack_assoc_id); |
9c5829e1 XL |
6073 | if (!asoc && params.sack_assoc_id != SCTP_FUTURE_ASSOC && |
6074 | sctp_style(sk, UDP)) | |
7708610b FF |
6075 | return -EINVAL; |
6076 | ||
6077 | if (asoc) { | |
6078 | /* Fetch association values. */ | |
d364d927 | 6079 | if (asoc->param_flags & SPP_SACKDELAY_ENABLE) { |
9c5829e1 | 6080 | params.sack_delay = jiffies_to_msecs(asoc->sackdelay); |
d364d927 WY |
6081 | params.sack_freq = asoc->sackfreq; |
6082 | ||
6083 | } else { | |
6084 | params.sack_delay = 0; | |
6085 | params.sack_freq = 1; | |
6086 | } | |
7708610b FF |
6087 | } else { |
6088 | /* Fetch socket values. */ | |
d364d927 WY |
6089 | if (sp->param_flags & SPP_SACKDELAY_ENABLE) { |
6090 | params.sack_delay = sp->sackdelay; | |
6091 | params.sack_freq = sp->sackfreq; | |
6092 | } else { | |
6093 | params.sack_delay = 0; | |
6094 | params.sack_freq = 1; | |
6095 | } | |
7708610b FF |
6096 | } |
6097 | ||
6098 | if (copy_to_user(optval, ¶ms, len)) | |
6099 | return -EFAULT; | |
6100 | ||
6101 | if (put_user(len, optlen)) | |
6102 | return -EFAULT; | |
6103 | ||
6104 | return 0; | |
6105 | } | |
6106 | ||
1da177e4 LT |
6107 | /* 7.1.3 Initialization Parameters (SCTP_INITMSG) |
6108 | * | |
6109 | * Applications can specify protocol parameters for the default association | |
6110 | * initialization. The option name argument to setsockopt() and getsockopt() | |
6111 | * is SCTP_INITMSG. | |
6112 | * | |
6113 | * Setting initialization parameters is effective only on an unconnected | |
6114 | * socket (for UDP-style sockets only future associations are effected | |
6115 | * by the change). With TCP-style sockets, this option is inherited by | |
6116 | * sockets derived from a listener socket. | |
6117 | */ | |
6118 | static int sctp_getsockopt_initmsg(struct sock *sk, int len, char __user *optval, int __user *optlen) | |
6119 | { | |
408f22e8 | 6120 | if (len < sizeof(struct sctp_initmsg)) |
1da177e4 | 6121 | return -EINVAL; |
408f22e8 NH |
6122 | len = sizeof(struct sctp_initmsg); |
6123 | if (put_user(len, optlen)) | |
6124 | return -EFAULT; | |
1da177e4 LT |
6125 | if (copy_to_user(optval, &sctp_sk(sk)->initmsg, len)) |
6126 | return -EFAULT; | |
6127 | return 0; | |
6128 | } | |
6129 | ||