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0f113f3e 1/*
3c7d0945 2 * Copyright 2005-2018 The OpenSSL Project Authors. All Rights Reserved.
36d16f8e 3 *
09abbca1 4 * Licensed under the Apache License 2.0 (the "License"). You may not use
b1322259
RS		 5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
36d16f8e
BL		 8 */
9
36d16f8e
BL		 10#include <stdio.h>
11#include <errno.h>
36d16f8e 12
706457b7 13#include "bio_local.h"
74e056ed 14#ifndef OPENSSL_NO_DGRAM
36d16f8e 15
0f113f3e
MC		 16# ifndef OPENSSL_NO_SCTP
17# include <netinet/sctp.h>
18# include <fcntl.h>
19# define OPENSSL_SCTP_DATA_CHUNK_TYPE 0x00
20# define OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE 0xc0
21# endif
7e159e01 22
0f113f3e
MC		 23# if defined(OPENSSL_SYS_LINUX) && !defined(IP_MTU)
24# define IP_MTU 14 /* linux is lame */
25# endif
36d16f8e 26
0f113f3e
MC		 27# if OPENSSL_USE_IPV6 && !defined(IPPROTO_IPV6)
28# define IPPROTO_IPV6 41 /* windows is lame */
29# endif
5833e4f5 30
0f113f3e 31# if defined(__FreeBSD__) && defined(IN6_IS_ADDR_V4MAPPED)
03c1d9f9 32/* Standard definition causes type-punning problems. */
0f113f3e
MC		 33# undef IN6_IS_ADDR_V4MAPPED
34# define s6_addr32 __u6_addr.__u6_addr32
35# define IN6_IS_ADDR_V4MAPPED(a) \
03c1d9f9
BL		 36 (((a)->s6_addr32[0] == 0) && \
37 ((a)->s6_addr32[1] == 0) && \
38 ((a)->s6_addr32[2] == htonl(0x0000ffff)))
0f113f3e 39# endif
03c1d9f9 40
36d16f8e
BL		 41static int dgram_write(BIO *h, const char *buf, int num);
42static int dgram_read(BIO *h, char *buf, int size);
43static int dgram_puts(BIO *h, const char *str);
44static long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2);
45static int dgram_new(BIO *h);
46static int dgram_free(BIO *data);
47static int dgram_clear(BIO *bio);
48
0f113f3e 49# ifndef OPENSSL_NO_SCTP
7e159e01
DSH		 50static int dgram_sctp_write(BIO *h, const char *buf, int num);
51static int dgram_sctp_read(BIO *h, char *buf, int size);
52static int dgram_sctp_puts(BIO *h, const char *str);
53static long dgram_sctp_ctrl(BIO *h, int cmd, long arg1, void *arg2);
54static int dgram_sctp_new(BIO *h);
55static int dgram_sctp_free(BIO *data);
c8edb04f 56static int dgram_sctp_wait_for_dry(BIO *b);
57static int dgram_sctp_msg_waiting(BIO *b);
0f113f3e
MC		 58# ifdef SCTP_AUTHENTICATION_EVENT
59static void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification
60 *snp);
61# endif
62# endif
7e159e01 63
b3e72fc3 64static int BIO_dgram_should_retry(int s);
36d16f8e 65
5d6a0179
RL		 66static void get_current_time(struct timeval *t);
67
04f6b0fd 68static const BIO_METHOD methods_dgramp = {
0f113f3e
MC		 69 BIO_TYPE_DGRAM,
70 "datagram socket",
3befffa3
MC		 71 /* TODO: Convert to new style write function */
72 bwrite_conv,
0f113f3e 73 dgram_write,
d07aee2c
MC		 74 /* TODO: Convert to new style read function */
75 bread_conv,
0f113f3e
MC		 76 dgram_read,
77 dgram_puts,
b4ff6622 78 NULL, /* dgram_gets, */
0f113f3e
MC		 79 dgram_ctrl,
80 dgram_new,
81 dgram_free,
b4ff6622 82 NULL, /* dgram_callback_ctrl */
0f113f3e
MC		 83};
84
85# ifndef OPENSSL_NO_SCTP
04f6b0fd 86static const BIO_METHOD methods_dgramp_sctp = {
0f113f3e
MC		 87 BIO_TYPE_DGRAM_SCTP,
88 "datagram sctp socket",
992155d0
RL		 89 /* TODO: Convert to new style write function */
90 bwrite_conv,
0f113f3e 91 dgram_sctp_write,
992155d0
RL		 92 /* TODO: Convert to new style write function */
93 bread_conv,
0f113f3e
MC		 94 dgram_sctp_read,
95 dgram_sctp_puts,
b4ff6622 96 NULL, /* dgram_gets, */
0f113f3e
MC		 97 dgram_sctp_ctrl,
98 dgram_sctp_new,
99 dgram_sctp_free,
b4ff6622 100 NULL, /* dgram_callback_ctrl */
0f113f3e
MC		 101};
102# endif
7e159e01 103
0f113f3e 104typedef struct bio_dgram_data_st {
d858c876 105 BIO_ADDR peer;
0f113f3e
MC		 106 unsigned int connected;
107 unsigned int _errno;
108 unsigned int mtu;
109 struct timeval next_timeout;
110 struct timeval socket_timeout;
01b7851a 111 unsigned int peekmode;
0f113f3e
MC		 112} bio_dgram_data;
113
114# ifndef OPENSSL_NO_SCTP
115typedef struct bio_dgram_sctp_save_message_st {
116 BIO *bio;
117 char *data;
118 int length;
119} bio_dgram_sctp_save_message;
120
121typedef struct bio_dgram_sctp_data_st {
d858c876 122 BIO_ADDR peer;
0f113f3e
MC		 123 unsigned int connected;
124 unsigned int _errno;
125 unsigned int mtu;
126 struct bio_dgram_sctp_sndinfo sndinfo;
127 struct bio_dgram_sctp_rcvinfo rcvinfo;
128 struct bio_dgram_sctp_prinfo prinfo;
c8edb04f 129 BIO_dgram_sctp_notification_handler_fn handle_notifications;
0f113f3e
MC		 130 void *notification_context;
131 int in_handshake;
132 int ccs_rcvd;
133 int ccs_sent;
134 int save_shutdown;
135 int peer_auth_tested;
0f113f3e
MC		 136} bio_dgram_sctp_data;
137# endif
7e159e01 138
04f6b0fd 139const BIO_METHOD *BIO_s_datagram(void)
0f113f3e 140{
26a7d938 141 return &methods_dgramp;
0f113f3e 142}
36d16f8e
BL		 143
144BIO *BIO_new_dgram(int fd, int close_flag)
0f113f3e
MC		 145{
146 BIO *ret;
36d16f8e 147
0f113f3e
MC		 148 ret = BIO_new(BIO_s_datagram());
149 if (ret == NULL)
26a7d938 150 return NULL;
0f113f3e 151 BIO_set_fd(ret, fd, close_flag);
26a7d938 152 return ret;
0f113f3e 153}
36d16f8e
BL		 154
155static int dgram_new(BIO *bi)
0f113f3e 156{
b51bce94 157 bio_dgram_data *data = OPENSSL_zalloc(sizeof(*data));
0f113f3e 158
0f113f3e
MC		 159 if (data == NULL)
160 return 0;
36d16f8e 161 bi->ptr = data;
208fb891 162 return 1;
0f113f3e 163}
36d16f8e
BL		 164
165static int dgram_free(BIO *a)
0f113f3e
MC		 166{
167 bio_dgram_data *data;
36d16f8e 168
0f113f3e 169 if (a == NULL)
26a7d938 170 return 0;
0f113f3e
MC		 171 if (!dgram_clear(a))
172 return 0;
36d16f8e 173
0f113f3e 174 data = (bio_dgram_data *)a->ptr;
b548a1f1 175 OPENSSL_free(data);
36d16f8e 176
208fb891 177 return 1;
0f113f3e 178}
36d16f8e
BL		 179
180static int dgram_clear(BIO *a)
0f113f3e
MC		 181{
182 if (a == NULL)
26a7d938 183 return 0;
0f113f3e
MC		 184 if (a->shutdown) {
185 if (a->init) {
8731a4fc 186 BIO_closesocket(a->num);
0f113f3e
MC		 187 }
188 a->init = 0;
189 a->flags = 0;
190 }
208fb891 191 return 1;
0f113f3e 192}
eb38b26d
DSH		 193
194static void dgram_adjust_rcv_timeout(BIO *b)
0f113f3e
MC		 195{
196# if defined(SO_RCVTIMEO)
197 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
198 union {
199 size_t s;
200 int i;
201 } sz = {
202 0
203 };
204
205 /* Is a timer active? */
206 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
207 struct timeval timenow, timeleft;
208
209 /* Read current socket timeout */
210# ifdef OPENSSL_SYS_WINDOWS
211 int timeout;
212
213 sz.i = sizeof(timeout);
214 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
215 (void *)&timeout, &sz.i) < 0) {
216 perror("getsockopt");
217 } else {
218 data->socket_timeout.tv_sec = timeout / 1000;
219 data->socket_timeout.tv_usec = (timeout % 1000) * 1000;
220 }
221# else
222 sz.i = sizeof(data->socket_timeout);
223 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
224 &(data->socket_timeout), (void *)&sz) < 0) {
225 perror("getsockopt");
226 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0)
227 OPENSSL_assert(sz.s <= sizeof(data->socket_timeout));
228# endif
eb38b26d 229
0f113f3e
MC		 230 /* Get current time */
231 get_current_time(&timenow);
232
233 /* Calculate time left until timer expires */
234 memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval));
fc52ac90
MC		 235 if (timeleft.tv_usec < timenow.tv_usec) {
236 timeleft.tv_usec = 1000000 - timenow.tv_usec + timeleft.tv_usec;
0f113f3e 237 timeleft.tv_sec--;
fc52ac90
MC		 238 } else {
239 timeleft.tv_usec -= timenow.tv_usec;
0f113f3e 240 }
fc52ac90 241 if (timeleft.tv_sec < timenow.tv_sec) {
0f113f3e
MC		 242 timeleft.tv_sec = 0;
243 timeleft.tv_usec = 1;
fc52ac90
MC		 244 } else {
245 timeleft.tv_sec -= timenow.tv_sec;
0f113f3e
MC		 246 }
247
248 /*
0d4fb843 249 * Adjust socket timeout if next handshake message timer will expire
0f113f3e
MC		 250 * earlier.
251 */
252 if ((data->socket_timeout.tv_sec == 0
253 && data->socket_timeout.tv_usec == 0)
254 || (data->socket_timeout.tv_sec > timeleft.tv_sec)
255 || (data->socket_timeout.tv_sec == timeleft.tv_sec
256 && data->socket_timeout.tv_usec >= timeleft.tv_usec)) {
257# ifdef OPENSSL_SYS_WINDOWS
258 timeout = timeleft.tv_sec * 1000 + timeleft.tv_usec / 1000;
259 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
260 (void *)&timeout, sizeof(timeout)) < 0) {
261 perror("setsockopt");
262 }
263# else
264 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &timeleft,
265 sizeof(struct timeval)) < 0) {
266 perror("setsockopt");
267 }
268# endif
269 }
270 }
271# endif
272}
eb38b26d
DSH		 273
274static void dgram_reset_rcv_timeout(BIO *b)
0f113f3e
MC		 275{
276# if defined(SO_RCVTIMEO)
277 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
278
279 /* Is a timer active? */
280 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
281# ifdef OPENSSL_SYS_WINDOWS
282 int timeout = data->socket_timeout.tv_sec * 1000 +
283 data->socket_timeout.tv_usec / 1000;
284 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
285 (void *)&timeout, sizeof(timeout)) < 0) {
286 perror("setsockopt");
287 }
288# else
289 if (setsockopt
290 (b->num, SOL_SOCKET, SO_RCVTIMEO, &(data->socket_timeout),
291 sizeof(struct timeval)) < 0) {
292 perror("setsockopt");
293 }
294# endif
295 }
296# endif
297}
eb38b26d 298
36d16f8e 299static int dgram_read(BIO *b, char *out, int outl)
0f113f3e
MC		 300{
301 int ret = 0;
302 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
01b7851a 303 int flags = 0;
0f113f3e 304
d858c876
RL		 305 BIO_ADDR peer;
306 socklen_t len = sizeof(peer);
0f113f3e
MC		 307
308 if (out != NULL) {
309 clear_socket_error();
d858c876 310 memset(&peer, 0, sizeof(peer));
0f113f3e 311 dgram_adjust_rcv_timeout(b);
01b7851a
MC		 312 if (data->peekmode)
313 flags = MSG_PEEK;
d858c876
RL		 314 ret = recvfrom(b->num, out, outl, flags,
315 BIO_ADDR_sockaddr_noconst(&peer), &len);
0f113f3e
MC		 316
317 if (!data->connected && ret >= 0)
d858c876 318 BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &peer);
0f113f3e
MC		 319
320 BIO_clear_retry_flags(b);
321 if (ret < 0) {
322 if (BIO_dgram_should_retry(ret)) {
323 BIO_set_retry_read(b);
324 data->_errno = get_last_socket_error();
325 }
326 }
327
328 dgram_reset_rcv_timeout(b);
329 }
26a7d938 330 return ret;
0f113f3e 331}
36d16f8e
BL		 332
333static int dgram_write(BIO *b, const char *in, int inl)
0f113f3e
MC		 334{
335 int ret;
336 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
337 clear_socket_error();
338
339 if (data->connected)
340 ret = writesocket(b->num, in, inl);
341 else {
d858c876 342 int peerlen = BIO_ADDR_sockaddr_size(&data->peer);
0f113f3e 343
d858c876
RL		 344 ret = sendto(b->num, in, inl, 0,
345 BIO_ADDR_sockaddr(&data->peer), peerlen);
0f113f3e
MC		 346 }
347
348 BIO_clear_retry_flags(b);
349 if (ret <= 0) {
350 if (BIO_dgram_should_retry(ret)) {
351 BIO_set_retry_write(b);
352 data->_errno = get_last_socket_error();
0f113f3e
MC		 353 }
354 }
26a7d938 355 return ret;
0f113f3e 356}
36d16f8e 357
0d3ae34d 358static long dgram_get_mtu_overhead(bio_dgram_data *data)
0f113f3e
MC		 359{
360 long ret;
361
d858c876 362 switch (BIO_ADDR_family(&data->peer)) {
0f113f3e
MC		 363 case AF_INET:
364 /*
365 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
366 */
367 ret = 28;
368 break;
f36e9f11 369# if OPENSSL_USE_IPV6
0f113f3e 370 case AF_INET6:
d858c876 371 {
0f113f3e 372# ifdef IN6_IS_ADDR_V4MAPPED
d858c876
RL		 373 struct in6_addr tmp_addr;
374 if (BIO_ADDR_rawaddress(&data->peer, &tmp_addr, NULL)
375 && IN6_IS_ADDR_V4MAPPED(&tmp_addr))
376 /*
377 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
378 */
379 ret = 28;
380 else
0f113f3e
MC		 381# endif
382 /*
383 * Assume this is UDP - 40 bytes for IP, 8 bytes for UDP
384 */
385 ret = 48;
d858c876 386 }
0f113f3e
MC		 387 break;
388# endif
389 default:
390 /* We don't know. Go with the historical default */
391 ret = 28;
392 break;
393 }
394 return ret;
395}
0d3ae34d 396
36d16f8e 397static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
0f113f3e
MC		 398{
399 long ret = 1;
400 int *ip;
0f113f3e
MC		 401 bio_dgram_data *data = NULL;
402 int sockopt_val = 0;
b5292f7b 403 int d_errno;
0f113f3e
MC		 404# if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
405 socklen_t sockopt_len; /* assume that system supporting IP_MTU is
406 * modern enough to define socklen_t */
407 socklen_t addr_len;
d858c876 408 BIO_ADDR addr;
0f113f3e 409# endif
36d16f8e 410
0f113f3e
MC		 411 data = (bio_dgram_data *)b->ptr;
412
413 switch (cmd) {
414 case BIO_CTRL_RESET:
415 num = 0;
0f113f3e
MC		 416 ret = 0;
417 break;
0f113f3e
MC		 418 case BIO_CTRL_INFO:
419 ret = 0;
420 break;
421 case BIO_C_SET_FD:
422 dgram_clear(b);
423 b->num = *((int *)ptr);
424 b->shutdown = (int)num;
425 b->init = 1;
426 break;
427 case BIO_C_GET_FD:
428 if (b->init) {
429 ip = (int *)ptr;
430 if (ip != NULL)
431 *ip = b->num;
432 ret = b->num;
433 } else
434 ret = -1;
435 break;
436 case BIO_CTRL_GET_CLOSE:
437 ret = b->shutdown;
438 break;
439 case BIO_CTRL_SET_CLOSE:
440 b->shutdown = (int)num;
441 break;
442 case BIO_CTRL_PENDING:
443 case BIO_CTRL_WPENDING:
444 ret = 0;
445 break;
446 case BIO_CTRL_DUP:
447 case BIO_CTRL_FLUSH:
448 ret = 1;
449 break;
450 case BIO_CTRL_DGRAM_CONNECT:
d858c876 451 BIO_ADDR_make(&data->peer, BIO_ADDR_sockaddr((BIO_ADDR *)ptr));
0f113f3e
MC		 452 break;
453 /* (Linux)kernel sets DF bit on outgoing IP packets */
454 case BIO_CTRL_DGRAM_MTU_DISCOVER:
455# if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
456 addr_len = (socklen_t) sizeof(addr);
16f8d4eb 457 memset(&addr, 0, sizeof(addr));
0f113f3e
MC		 458 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
459 ret = 0;
460 break;
461 }
462 switch (addr.sa.sa_family) {
463 case AF_INET:
464 sockopt_val = IP_PMTUDISC_DO;
465 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
466 &sockopt_val, sizeof(sockopt_val))) < 0)
467 perror("setsockopt");
468 break;
469# if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
470 case AF_INET6:
471 sockopt_val = IPV6_PMTUDISC_DO;
472 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
473 &sockopt_val, sizeof(sockopt_val))) < 0)
474 perror("setsockopt");
475 break;
476# endif
477 default:
478 ret = -1;
479 break;
480 }
481# else
482 ret = -1;
483# endif
484 break;
485 case BIO_CTRL_DGRAM_QUERY_MTU:
486# if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU)
487 addr_len = (socklen_t) sizeof(addr);
16f8d4eb 488 memset(&addr, 0, sizeof(addr));
0f113f3e
MC		 489 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
490 ret = 0;
491 break;
492 }
493 sockopt_len = sizeof(sockopt_val);
494 switch (addr.sa.sa_family) {
495 case AF_INET:
496 if ((ret =
497 getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
498 &sockopt_len)) < 0 || sockopt_val < 0) {
499 ret = 0;
500 } else {
501 /*
502 * we assume that the transport protocol is UDP and no IP
503 * options are used.
504 */
505 data->mtu = sockopt_val - 8 - 20;
506 ret = data->mtu;
507 }
508 break;
509# if OPENSSL_USE_IPV6 && defined(IPV6_MTU)
510 case AF_INET6:
511 if ((ret =
512 getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU,
513 (void *)&sockopt_val, &sockopt_len)) < 0
514 || sockopt_val < 0) {
515 ret = 0;
516 } else {
517 /*
518 * we assume that the transport protocol is UDP and no IPV6
519 * options are used.
520 */
521 data->mtu = sockopt_val - 8 - 40;
522 ret = data->mtu;
523 }
524 break;
525# endif
526 default:
527 ret = 0;
528 break;
529 }
530# else
531 ret = 0;
532# endif
533 break;
534 case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
535 ret = -dgram_get_mtu_overhead(data);
d858c876 536 switch (BIO_ADDR_family(&data->peer)) {
0f113f3e
MC		 537 case AF_INET:
538 ret += 576;
539 break;
540# if OPENSSL_USE_IPV6
541 case AF_INET6:
d858c876 542 {
0f113f3e 543# ifdef IN6_IS_ADDR_V4MAPPED
d858c876
RL		 544 struct in6_addr tmp_addr;
545 if (BIO_ADDR_rawaddress(&data->peer, &tmp_addr, NULL)
546 && IN6_IS_ADDR_V4MAPPED(&tmp_addr))
547 ret += 576;
548 else
0f113f3e 549# endif
d858c876
RL		 550 ret += 1280;
551 }
0f113f3e
MC		 552 break;
553# endif
554 default:
555 ret += 576;
556 break;
557 }
558 break;
559 case BIO_CTRL_DGRAM_GET_MTU:
560 return data->mtu;
0f113f3e
MC		 561 case BIO_CTRL_DGRAM_SET_MTU:
562 data->mtu = num;
563 ret = num;
564 break;
565 case BIO_CTRL_DGRAM_SET_CONNECTED:
d858c876 566 if (ptr != NULL) {
0f113f3e 567 data->connected = 1;
d858c876 568 BIO_ADDR_make(&data->peer, BIO_ADDR_sockaddr((BIO_ADDR *)ptr));
0f113f3e
MC		 569 } else {
570 data->connected = 0;
16f8d4eb 571 memset(&data->peer, 0, sizeof(data->peer));
0f113f3e
MC		 572 }
573 break;
574 case BIO_CTRL_DGRAM_GET_PEER:
d858c876
RL		 575 ret = BIO_ADDR_sockaddr_size(&data->peer);
576 /* FIXME: if num < ret, we will only return part of an address.
577 That should bee an error, no? */
0f113f3e
MC		 578 if (num == 0 || num > ret)
579 num = ret;
580 memcpy(ptr, &data->peer, (ret = num));
581 break;
582 case BIO_CTRL_DGRAM_SET_PEER:
d858c876 583 BIO_ADDR_make(&data->peer, BIO_ADDR_sockaddr((BIO_ADDR *)ptr));
0f113f3e
MC		 584 break;
585 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
586 memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
587 break;
588# if defined(SO_RCVTIMEO)
589 case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
590# ifdef OPENSSL_SYS_WINDOWS
591 {
592 struct timeval *tv = (struct timeval *)ptr;
593 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
594 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
595 (void *)&timeout, sizeof(timeout)) < 0) {
596 perror("setsockopt");
597 ret = -1;
598 }
599 }
600# else
601 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
602 sizeof(struct timeval)) < 0) {
603 perror("setsockopt");
604 ret = -1;
605 }
606# endif
607 break;
608 case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
609 {
610 union {
611 size_t s;
612 int i;
613 } sz = {
614 0
615 };
616# ifdef OPENSSL_SYS_WINDOWS
617 int timeout;
618 struct timeval *tv = (struct timeval *)ptr;
619
620 sz.i = sizeof(timeout);
621 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
622 (void *)&timeout, &sz.i) < 0) {
623 perror("getsockopt");
624 ret = -1;
625 } else {
626 tv->tv_sec = timeout / 1000;
627 tv->tv_usec = (timeout % 1000) * 1000;
628 ret = sizeof(*tv);
629 }
630# else
631 sz.i = sizeof(struct timeval);
632 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
633 ptr, (void *)&sz) < 0) {
634 perror("getsockopt");
635 ret = -1;
636 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
637 OPENSSL_assert(sz.s <= sizeof(struct timeval));
638 ret = (int)sz.s;
639 } else
640 ret = sz.i;
641# endif
642 }
643 break;
644# endif
645# if defined(SO_SNDTIMEO)
646 case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
647# ifdef OPENSSL_SYS_WINDOWS
648 {
649 struct timeval *tv = (struct timeval *)ptr;
650 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
651 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
652 (void *)&timeout, sizeof(timeout)) < 0) {
653 perror("setsockopt");
654 ret = -1;
655 }
656 }
657# else
658 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
659 sizeof(struct timeval)) < 0) {
660 perror("setsockopt");
661 ret = -1;
662 }
663# endif
664 break;
665 case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
666 {
667 union {
668 size_t s;
669 int i;
670 } sz = {
671 0
672 };
673# ifdef OPENSSL_SYS_WINDOWS
674 int timeout;
675 struct timeval *tv = (struct timeval *)ptr;
676
677 sz.i = sizeof(timeout);
678 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
679 (void *)&timeout, &sz.i) < 0) {
680 perror("getsockopt");
681 ret = -1;
682 } else {
683 tv->tv_sec = timeout / 1000;
684 tv->tv_usec = (timeout % 1000) * 1000;
685 ret = sizeof(*tv);
686 }
687# else
688 sz.i = sizeof(struct timeval);
689 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
690 ptr, (void *)&sz) < 0) {
691 perror("getsockopt");
692 ret = -1;
693 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
694 OPENSSL_assert(sz.s <= sizeof(struct timeval));
695 ret = (int)sz.s;
696 } else
697 ret = sz.i;
698# endif
699 }
700 break;
701# endif
702 case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
703 /* fall-through */
704 case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
705# ifdef OPENSSL_SYS_WINDOWS
b5292f7b 706 d_errno = (data->_errno == WSAETIMEDOUT);
0f113f3e 707# else
b5292f7b 708 d_errno = (data->_errno == EAGAIN);
0f113f3e 709# endif
b5292f7b 710 if (d_errno) {
0f113f3e
MC		 711 ret = 1;
712 data->_errno = 0;
713 } else
714 ret = 0;
715 break;
716# ifdef EMSGSIZE
717 case BIO_CTRL_DGRAM_MTU_EXCEEDED:
718 if (data->_errno == EMSGSIZE) {
719 ret = 1;
720 data->_errno = 0;
721 } else
722 ret = 0;
723 break;
724# endif
725 case BIO_CTRL_DGRAM_SET_DONT_FRAG:
726 sockopt_val = num ? 1 : 0;
727
728 switch (data->peer.sa.sa_family) {
729 case AF_INET:
730# if defined(IP_DONTFRAG)
731 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAG,
732 &sockopt_val, sizeof(sockopt_val))) < 0) {
733 perror("setsockopt");
734 ret = -1;
735 }
133dce44 736# elif defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined (IP_PMTUDISC_PROBE)
0f113f3e
MC		 737 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
738 (ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
739 &sockopt_val, sizeof(sockopt_val))) < 0) {
740 perror("setsockopt");
741 ret = -1;
742 }
743# elif defined(OPENSSL_SYS_WINDOWS) && defined(IP_DONTFRAGMENT)
744 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAGMENT,
745 (const char *)&sockopt_val,
746 sizeof(sockopt_val))) < 0) {
747 perror("setsockopt");
748 ret = -1;
749 }
750# else
751 ret = -1;
752# endif
753 break;
754# if OPENSSL_USE_IPV6
755 case AF_INET6:
756# if defined(IPV6_DONTFRAG)
757 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_DONTFRAG,
758 (const void *)&sockopt_val,
759 sizeof(sockopt_val))) < 0) {
760 perror("setsockopt");
761 ret = -1;
762 }
763# elif defined(OPENSSL_SYS_LINUX) && defined(IPV6_MTUDISCOVER)
764 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
765 (ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
766 &sockopt_val, sizeof(sockopt_val))) < 0) {
767 perror("setsockopt");
768 ret = -1;
769 }
770# else
771 ret = -1;
772# endif
773 break;
774# endif
775 default:
776 ret = -1;
777 break;
778 }
779 break;
780 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
781 ret = dgram_get_mtu_overhead(data);
782 break;
99240875
MC		 783
784 /*
785 * BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE is used here for compatibility
786 * reasons. When BIO_CTRL_DGRAM_SET_PEEK_MODE was first defined its value
787 * was incorrectly clashing with BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE. The
788 * value has been updated to a non-clashing value. However to preserve
c2969ff6 789 * binary compatibility we now respond to both the old value and the new one
99240875
MC		 790 */
791 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
01b7851a
MC		 792 case BIO_CTRL_DGRAM_SET_PEEK_MODE:
793 data->peekmode = (unsigned int)num;
794 break;
0f113f3e
MC		 795 default:
796 ret = 0;
797 break;
798 }
26a7d938 799 return ret;
0f113f3e 800}
36d16f8e
BL		 801
802static int dgram_puts(BIO *bp, const char *str)
0f113f3e
MC		 803{
804 int n, ret;
36d16f8e 805
0f113f3e
MC		 806 n = strlen(str);
807 ret = dgram_write(bp, str, n);
26a7d938 808 return ret;
0f113f3e 809}
36d16f8e 810
0f113f3e 811# ifndef OPENSSL_NO_SCTP
04f6b0fd 812const BIO_METHOD *BIO_s_datagram_sctp(void)
0f113f3e 813{
26a7d938 814 return &methods_dgramp_sctp;
0f113f3e 815}
7e159e01
DSH		 816
817BIO *BIO_new_dgram_sctp(int fd, int close_flag)
0f113f3e
MC		 818{
819 BIO *bio;
820 int ret, optval = 20000;
821 int auth_data = 0, auth_forward = 0;
822 unsigned char *p;
823 struct sctp_authchunk auth;
824 struct sctp_authchunks *authchunks;
825 socklen_t sockopt_len;
826# ifdef SCTP_AUTHENTICATION_EVENT
827# ifdef SCTP_EVENT
828 struct sctp_event event;
829# else
830 struct sctp_event_subscribe event;
831# endif
832# endif
7e159e01 833
0f113f3e
MC		 834 bio = BIO_new(BIO_s_datagram_sctp());
835 if (bio == NULL)
26a7d938 836 return NULL;
0f113f3e
MC		 837 BIO_set_fd(bio, fd, close_flag);
838
839 /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */
840 auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE;
841 ret =
842 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
843 sizeof(struct sctp_authchunk));
844 if (ret < 0) {
845 BIO_vfree(bio);
dcf88c5b
MC		 846 BIOerr(BIO_F_BIO_NEW_DGRAM_SCTP, ERR_R_SYS_LIB);
847 ERR_add_error_data(1, "Ensure SCTP AUTH chunks are enabled in kernel");
26a7d938 848 return NULL;
0f113f3e
MC		 849 }
850 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
851 ret =
852 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
853 sizeof(struct sctp_authchunk));
854 if (ret < 0) {
855 BIO_vfree(bio);
dcf88c5b
MC		 856 BIOerr(BIO_F_BIO_NEW_DGRAM_SCTP, ERR_R_SYS_LIB);
857 ERR_add_error_data(1, "Ensure SCTP AUTH chunks are enabled in kernel");
26a7d938 858 return NULL;
0f113f3e
MC		 859 }
860
861 /*
862 * Test if activation was successful. When using accept(), SCTP-AUTH has
863 * to be activated for the listening socket already, otherwise the
dcf88c5b
MC		 864 * connected socket won't use it. Similarly with connect(): the socket
865 * prior to connection must be activated for SCTP-AUTH
0f113f3e
MC		 866 */
867 sockopt_len = (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
b51bce94 868 authchunks = OPENSSL_zalloc(sockopt_len);
90945fa3 869 if (authchunks == NULL) {
918bb865 870 BIO_vfree(bio);
26a7d938 871 return NULL;
918bb865 872 }
b51bce94 873 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks,
0f113f3e 874 &sockopt_len);
0f113f3e
MC		 875 if (ret < 0) {
876 OPENSSL_free(authchunks);
877 BIO_vfree(bio);
26a7d938 878 return NULL;
0f113f3e
MC		 879 }
880
881 for (p = (unsigned char *)authchunks->gauth_chunks;
882 p < (unsigned char *)authchunks + sockopt_len;
883 p += sizeof(uint8_t)) {
884 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
885 auth_data = 1;
886 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
887 auth_forward = 1;
888 }
889
890 OPENSSL_free(authchunks);
891
dcf88c5b
MC		 892 if (!auth_data || !auth_forward) {
893 BIO_vfree(bio);
894 BIOerr(BIO_F_BIO_NEW_DGRAM_SCTP, ERR_R_SYS_LIB);
895 ERR_add_error_data(1,
896 "Ensure SCTP AUTH chunks are enabled on the "
897 "underlying socket");
898 return NULL;
899 }
0f113f3e
MC		 900
901# ifdef SCTP_AUTHENTICATION_EVENT
902# ifdef SCTP_EVENT
16f8d4eb 903 memset(&event, 0, sizeof(event));
0f113f3e
MC		 904 event.se_assoc_id = 0;
905 event.se_type = SCTP_AUTHENTICATION_EVENT;
906 event.se_on = 1;
907 ret =
908 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event,
909 sizeof(struct sctp_event));
910 if (ret < 0) {
911 BIO_vfree(bio);
26a7d938 912 return NULL;
0f113f3e
MC		 913 }
914# else
915 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
916 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
917 if (ret < 0) {
918 BIO_vfree(bio);
26a7d938 919 return NULL;
0f113f3e
MC		 920 }
921
922 event.sctp_authentication_event = 1;
923
924 ret =
925 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event,
926 sizeof(struct sctp_event_subscribe));
927 if (ret < 0) {
928 BIO_vfree(bio);
26a7d938 929 return NULL;
0f113f3e
MC		 930 }
931# endif
932# endif
7e159e01 933
0f113f3e
MC		 934 /*
935 * Disable partial delivery by setting the min size larger than the max
936 * record size of 2^14 + 2048 + 13
937 */
938 ret =
939 setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval,
940 sizeof(optval));
941 if (ret < 0) {
942 BIO_vfree(bio);
26a7d938 943 return NULL;
0f113f3e
MC		 944 }
945
26a7d938 946 return bio;
0f113f3e 947}
7e159e01
DSH		 948
949int BIO_dgram_is_sctp(BIO *bio)
0f113f3e
MC		 950{
951 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
952}
7e159e01
DSH		 953
954static int dgram_sctp_new(BIO *bi)
0f113f3e
MC		 955{
956 bio_dgram_sctp_data *data = NULL;
957
958 bi->init = 0;
959 bi->num = 0;
cdb10bae
RS		 960 if ((data = OPENSSL_zalloc(sizeof(*data))) == NULL) {
961 BIOerr(BIO_F_DGRAM_SCTP_NEW, ERR_R_MALLOC_FAILURE);
0f113f3e 962 return 0;
cdb10bae 963 }
0f113f3e
MC		 964# ifdef SCTP_PR_SCTP_NONE
965 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
966# endif
7e159e01
DSH		 967 bi->ptr = data;
968
0f113f3e 969 bi->flags = 0;
208fb891 970 return 1;
0f113f3e 971}
7e159e01
DSH		 972
973static int dgram_sctp_free(BIO *a)
0f113f3e
MC		 974{
975 bio_dgram_sctp_data *data;
7e159e01 976
0f113f3e 977 if (a == NULL)
26a7d938 978 return 0;
0f113f3e
MC		 979 if (!dgram_clear(a))
980 return 0;
7e159e01 981
0f113f3e 982 data = (bio_dgram_sctp_data *) a->ptr;
41b3c9ce 983 if (data != NULL)
0f113f3e 984 OPENSSL_free(data);
0f113f3e 985
208fb891 986 return 1;
0f113f3e 987}
7e159e01 988
0f113f3e
MC		 989# ifdef SCTP_AUTHENTICATION_EVENT
990void dgram_sctp_handle_auth_free_key_event(BIO *b,
991 union sctp_notification *snp)
992{
993 int ret;
994 struct sctp_authkey_event *authkeyevent = &snp->sn_auth_event;
995
996 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY) {
997 struct sctp_authkeyid authkeyid;
998
999 /* delete key */
1000 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
1001 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1002 &authkeyid, sizeof(struct sctp_authkeyid));
1003 }
1004}
1005# endif
1006
1007static int dgram_sctp_read(BIO *b, char *out, int outl)
1008{
1009 int ret = 0, n = 0, i, optval;
1010 socklen_t optlen;
1011 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1012 union sctp_notification *snp;
1013 struct msghdr msg;
1014 struct iovec iov;
1015 struct cmsghdr *cmsg;
1016 char cmsgbuf[512];
1017
1018 if (out != NULL) {
1019 clear_socket_error();
1020
1021 do {
16f8d4eb 1022 memset(&data->rcvinfo, 0, sizeof(data->rcvinfo));
0f113f3e
MC		 1023 iov.iov_base = out;
1024 iov.iov_len = outl;
1025 msg.msg_name = NULL;
1026 msg.msg_namelen = 0;
1027 msg.msg_iov = &iov;
1028 msg.msg_iovlen = 1;
1029 msg.msg_control = cmsgbuf;
1030 msg.msg_controllen = 512;
1031 msg.msg_flags = 0;
1032 n = recvmsg(b->num, &msg, 0);
1033
1034 if (n <= 0) {
1035 if (n < 0)
1036 ret = n;
1037 break;
1038 }
1039
1040 if (msg.msg_controllen > 0) {
1041 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg;
1042 cmsg = CMSG_NXTHDR(&msg, cmsg)) {
1043 if (cmsg->cmsg_level != IPPROTO_SCTP)
1044 continue;
1045# ifdef SCTP_RCVINFO
1046 if (cmsg->cmsg_type == SCTP_RCVINFO) {
1047 struct sctp_rcvinfo *rcvinfo;
1048
1049 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
1050 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
1051 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
1052 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
1053 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
1054 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1055 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1056 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1057 }
1058# endif
1059# ifdef SCTP_SNDRCV
1060 if (cmsg->cmsg_type == SCTP_SNDRCV) {
1061 struct sctp_sndrcvinfo *sndrcvinfo;
1062
1063 sndrcvinfo =
1064 (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1065 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1066 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1067 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1068 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1069 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1070 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1071 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1072 }
1073# endif
1074 }
1075 }
1076
1077 if (msg.msg_flags & MSG_NOTIFICATION) {
1078 snp = (union sctp_notification *)out;
1079 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1080# ifdef SCTP_EVENT
1081 struct sctp_event event;
1082# else
1083 struct sctp_event_subscribe event;
1084 socklen_t eventsize;
1085# endif
0f113f3e
MC		 1086
1087 /* disable sender dry event */
1088# ifdef SCTP_EVENT
16f8d4eb 1089 memset(&event, 0, sizeof(event));
0f113f3e
MC		 1090 event.se_assoc_id = 0;
1091 event.se_type = SCTP_SENDER_DRY_EVENT;
1092 event.se_on = 0;
1093 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1094 sizeof(struct sctp_event));
1095 if (i < 0) {
1096 ret = i;
1097 break;
1098 }
1099# else
1100 eventsize = sizeof(struct sctp_event_subscribe);
1101 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1102 &eventsize);
1103 if (i < 0) {
1104 ret = i;
1105 break;
1106 }
1107
1108 event.sctp_sender_dry_event = 0;
1109
1110 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1111 sizeof(struct sctp_event_subscribe));
1112 if (i < 0) {
1113 ret = i;
1114 break;
1115 }
1116# endif
1117 }
1118# ifdef SCTP_AUTHENTICATION_EVENT
1119 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1120 dgram_sctp_handle_auth_free_key_event(b, snp);
1121# endif
1122
1123 if (data->handle_notifications != NULL)
1124 data->handle_notifications(b, data->notification_context,
1125 (void *)out);
1126
1127 memset(out, 0, outl);
1128 } else
1129 ret += n;
1130 }
1131 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR)
1132 && (ret < outl));
1133
1134 if (ret > 0 && !(msg.msg_flags & MSG_EOR)) {
1135 /* Partial message read, this should never happen! */
1136
1137 /*
1138 * The buffer was too small, this means the peer sent a message
1139 * that was larger than allowed.
1140 */
1141 if (ret == outl)
1142 return -1;
1143
1144 /*
1145 * Test if socket buffer can handle max record size (2^14 + 2048
1146 * + 13)
1147 */
1148 optlen = (socklen_t) sizeof(int);
1149 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
1150 if (ret >= 0)
1151 OPENSSL_assert(optval >= 18445);
1152
1153 /*
1154 * Test if SCTP doesn't partially deliver below max record size
1155 * (2^14 + 2048 + 13)
1156 */
1157 optlen = (socklen_t) sizeof(int);
1158 ret =
1159 getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
1160 &optval, &optlen);
1161 if (ret >= 0)
1162 OPENSSL_assert(optval >= 18445);
1163
1164 /*
1165 * Partially delivered notification??? Probably a bug....
1166 */
1167 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
1168
1169 /*
1170 * Everything seems ok till now, so it's most likely a message
1171 * dropped by PR-SCTP.
1172 */
1173 memset(out, 0, outl);
1174 BIO_set_retry_read(b);
1175 return -1;
1176 }
1177
1178 BIO_clear_retry_flags(b);
1179 if (ret < 0) {
1180 if (BIO_dgram_should_retry(ret)) {
1181 BIO_set_retry_read(b);
1182 data->_errno = get_last_socket_error();
1183 }
1184 }
1185
1186 /* Test if peer uses SCTP-AUTH before continuing */
1187 if (!data->peer_auth_tested) {
1188 int ii, auth_data = 0, auth_forward = 0;
1189 unsigned char *p;
1190 struct sctp_authchunks *authchunks;
1191
1192 optlen =
1193 (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1194 authchunks = OPENSSL_malloc(optlen);
90945fa3 1195 if (authchunks == NULL) {
7c82e339 1196 BIOerr(BIO_F_DGRAM_SCTP_READ, ERR_R_MALLOC_FAILURE);
918bb865
MC		 1197 return -1;
1198 }
0f113f3e
MC		 1199 memset(authchunks, 0, optlen);
1200 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS,
1201 authchunks, &optlen);
1202
1203 if (ii >= 0)
1204 for (p = (unsigned char *)authchunks->gauth_chunks;
1205 p < (unsigned char *)authchunks + optlen;
1206 p += sizeof(uint8_t)) {
1207 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1208 auth_data = 1;
1209 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1210 auth_forward = 1;
1211 }
1212
1213 OPENSSL_free(authchunks);
1214
1215 if (!auth_data || !auth_forward) {
1216 BIOerr(BIO_F_DGRAM_SCTP_READ, BIO_R_CONNECT_ERROR);
1217 return -1;
1218 }
1219
1220 data->peer_auth_tested = 1;
1221 }
1222 }
26a7d938 1223 return ret;
0f113f3e 1224}
7e159e01 1225
7f098cb4
KR		 1226/*
1227 * dgram_sctp_write - send message on SCTP socket
1228 * @b: BIO to write to
1229 * @in: data to send
1230 * @inl: amount of bytes in @in to send
1231 *
1232 * Returns -1 on error or the sent amount of bytes on success
1233 */
7e159e01 1234static int dgram_sctp_write(BIO *b, const char *in, int inl)
0f113f3e
MC		 1235{
1236 int ret;
1237 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1238 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
1239 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
1240 struct bio_dgram_sctp_sndinfo handshake_sinfo;
1241 struct iovec iov[1];
1242 struct msghdr msg;
1243 struct cmsghdr *cmsg;
1244# if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1245 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) +
1246 CMSG_SPACE(sizeof(struct sctp_prinfo))];
1247 struct sctp_sndinfo *sndinfo;
1248 struct sctp_prinfo *prinfo;
1249# else
1250 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
1251 struct sctp_sndrcvinfo *sndrcvinfo;
1252# endif
7e159e01 1253
0f113f3e 1254 clear_socket_error();
7e159e01 1255
0f113f3e
MC		 1256 /*
1257 * If we're send anything else than application data, disable all user
1258 * parameters and flags.
1259 */
1260 if (in[0] != 23) {
16f8d4eb 1261 memset(&handshake_sinfo, 0, sizeof(handshake_sinfo));
0f113f3e
MC		 1262# ifdef SCTP_SACK_IMMEDIATELY
1263 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
1264# endif
1265 sinfo = &handshake_sinfo;
1266 }
1267
41b3c9ce 1268 /* We can only send a shutdown alert if the socket is dry */
03a1c850
KR		 1269 if (data->save_shutdown) {
1270 ret = BIO_dgram_sctp_wait_for_dry(b);
41b3c9ce 1271 if (ret < 0)
918bb865 1272 return -1;
03a1c850 1273 if (ret == 0) {
41b3c9ce
MC		 1274 BIO_clear_retry_flags(b);
1275 BIO_set_retry_write(b);
1276 return -1;
03a1c850 1277 }
0f113f3e
MC		 1278 }
1279
1280 iov[0].iov_base = (char *)in;
1281 iov[0].iov_len = inl;
1282 msg.msg_name = NULL;
1283 msg.msg_namelen = 0;
1284 msg.msg_iov = iov;
1285 msg.msg_iovlen = 1;
1286 msg.msg_control = (caddr_t) cmsgbuf;
1287 msg.msg_controllen = 0;
1288 msg.msg_flags = 0;
1289# if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1290 cmsg = (struct cmsghdr *)cmsgbuf;
1291 cmsg->cmsg_level = IPPROTO_SCTP;
1292 cmsg->cmsg_type = SCTP_SNDINFO;
1293 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
1294 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
16f8d4eb 1295 memset(sndinfo, 0, sizeof(*sndinfo));
0f113f3e
MC		 1296 sndinfo->snd_sid = sinfo->snd_sid;
1297 sndinfo->snd_flags = sinfo->snd_flags;
1298 sndinfo->snd_ppid = sinfo->snd_ppid;
1299 sndinfo->snd_context = sinfo->snd_context;
1300 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
1301
1302 cmsg =
1303 (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
1304 cmsg->cmsg_level = IPPROTO_SCTP;
1305 cmsg->cmsg_type = SCTP_PRINFO;
1306 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
1307 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
16f8d4eb 1308 memset(prinfo, 0, sizeof(*prinfo));
0f113f3e
MC		 1309 prinfo->pr_policy = pinfo->pr_policy;
1310 prinfo->pr_value = pinfo->pr_value;
1311 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
1312# else
1313 cmsg = (struct cmsghdr *)cmsgbuf;
1314 cmsg->cmsg_level = IPPROTO_SCTP;
1315 cmsg->cmsg_type = SCTP_SNDRCV;
1316 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
1317 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
16f8d4eb 1318 memset(sndrcvinfo, 0, sizeof(*sndrcvinfo));
0f113f3e
MC		 1319 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
1320 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
1321# ifdef __FreeBSD__
1322 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
1323# endif
1324 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
1325 sndrcvinfo->sinfo_context = sinfo->snd_context;
1326 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
1327 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
1328# endif
7e159e01 1329
0f113f3e 1330 ret = sendmsg(b->num, &msg, 0);
7e159e01 1331
0f113f3e
MC		 1332 BIO_clear_retry_flags(b);
1333 if (ret <= 0) {
1334 if (BIO_dgram_should_retry(ret)) {
1335 BIO_set_retry_write(b);
1336 data->_errno = get_last_socket_error();
1337 }
1338 }
26a7d938 1339 return ret;
0f113f3e 1340}
7e159e01
DSH		 1341
1342static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
0f113f3e
MC		 1343{
1344 long ret = 1;
1345 bio_dgram_sctp_data *data = NULL;
1346 socklen_t sockopt_len = 0;
1347 struct sctp_authkeyid authkeyid;
1348 struct sctp_authkey *authkey = NULL;
1349
1350 data = (bio_dgram_sctp_data *) b->ptr;
1351
1352 switch (cmd) {
1353 case BIO_CTRL_DGRAM_QUERY_MTU:
1354 /*
1355 * Set to maximum (2^14) and ignore user input to enable transport
1356 * protocol fragmentation. Returns always 2^14.
1357 */
1358 data->mtu = 16384;
1359 ret = data->mtu;
1360 break;
1361 case BIO_CTRL_DGRAM_SET_MTU:
1362 /*
1363 * Set to maximum (2^14) and ignore input to enable transport
1364 * protocol fragmentation. Returns always 2^14.
1365 */
1366 data->mtu = 16384;
1367 ret = data->mtu;
1368 break;
1369 case BIO_CTRL_DGRAM_SET_CONNECTED:
1370 case BIO_CTRL_DGRAM_CONNECT:
1371 /* Returns always -1. */
1372 ret = -1;
1373 break;
1374 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
1375 /*
1376 * SCTP doesn't need the DTLS timer Returns always 1.
1377 */
1378 break;
1379 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
1380 /*
1381 * We allow transport protocol fragmentation so this is irrelevant
1382 */
1383 ret = 0;
1384 break;
1385 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
1386 if (num > 0)
1387 data->in_handshake = 1;
1388 else
1389 data->in_handshake = 0;
1390
1391 ret =
1392 setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY,
1393 &data->in_handshake, sizeof(int));
1394 break;
1395 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
1396 /*
1397 * New shared key for SCTP AUTH. Returns 0 on success, -1 otherwise.
1398 */
1399
1400 /* Get active key */
1401 sockopt_len = sizeof(struct sctp_authkeyid);
1402 ret =
1403 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1404 &sockopt_len);
1405 if (ret < 0)
1406 break;
1407
1408 /* Add new key */
1409 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
1410 authkey = OPENSSL_malloc(sockopt_len);
1411 if (authkey == NULL) {
1412 ret = -1;
1413 break;
1414 }
16f8d4eb 1415 memset(authkey, 0, sockopt_len);
0f113f3e
MC		 1416 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
1417# ifndef __FreeBSD__
1418 /*
1419 * This field is missing in FreeBSD 8.2 and earlier, and FreeBSD 8.3
1420 * and higher work without it.
1421 */
1422 authkey->sca_keylength = 64;
1423# endif
1424 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
1425
1426 ret =
1427 setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey,
1428 sockopt_len);
1429 OPENSSL_free(authkey);
1430 authkey = NULL;
1431 if (ret < 0)
1432 break;
1433
1434 /* Reset active key */
1435 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1436 &authkeyid, sizeof(struct sctp_authkeyid));
1437 if (ret < 0)
1438 break;
1439
1440 break;
1441 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
1442 /* Returns 0 on success, -1 otherwise. */
1443
1444 /* Get active key */
1445 sockopt_len = sizeof(struct sctp_authkeyid);
1446 ret =
1447 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1448 &sockopt_len);
1449 if (ret < 0)
1450 break;
1451
1452 /* Set active key */
1453 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
1454 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1455 &authkeyid, sizeof(struct sctp_authkeyid));
1456 if (ret < 0)
1457 break;
1458
1459 /*
1460 * CCS has been sent, so remember that and fall through to check if
1461 * we need to deactivate an old key
1462 */
1463 data->ccs_sent = 1;
14716754 1464 /* fall-through */
0f113f3e
MC		 1465
1466 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
1467 /* Returns 0 on success, -1 otherwise. */
1468
1469 /*
1470 * Has this command really been called or is this just a
1471 * fall-through?
1472 */
1473 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
1474 data->ccs_rcvd = 1;
1475
1476 /*
1477 * CSS has been both, received and sent, so deactivate an old key
1478 */
1479 if (data->ccs_rcvd == 1 && data->ccs_sent == 1) {
1480 /* Get active key */
1481 sockopt_len = sizeof(struct sctp_authkeyid);
1482 ret =
1483 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1484 &authkeyid, &sockopt_len);
1485 if (ret < 0)
1486 break;
1487
1488 /*
1489 * Deactivate key or delete second last key if
1490 * SCTP_AUTHENTICATION_EVENT is not available.
1491 */
1492 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1493# ifdef SCTP_AUTH_DEACTIVATE_KEY
1494 sockopt_len = sizeof(struct sctp_authkeyid);
1495 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
1496 &authkeyid, sockopt_len);
1497 if (ret < 0)
1498 break;
1499# endif
1500# ifndef SCTP_AUTHENTICATION_EVENT
1501 if (authkeyid.scact_keynumber > 0) {
1502 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1503 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1504 &authkeyid, sizeof(struct sctp_authkeyid));
1505 if (ret < 0)
1506 break;
1507 }
1508# endif
7e159e01 1509
0f113f3e
MC		 1510 data->ccs_rcvd = 0;
1511 data->ccs_sent = 0;
1512 }
1513 break;
1514 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
1515 /* Returns the size of the copied struct. */
1516 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1517 num = sizeof(struct bio_dgram_sctp_sndinfo);
1518
1519 memcpy(ptr, &(data->sndinfo), num);
1520 ret = num;
1521 break;
1522 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
1523 /* Returns the size of the copied struct. */
1524 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1525 num = sizeof(struct bio_dgram_sctp_sndinfo);
1526
1527 memcpy(&(data->sndinfo), ptr, num);
1528 break;
1529 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
1530 /* Returns the size of the copied struct. */
1531 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1532 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1533
1534 memcpy(ptr, &data->rcvinfo, num);
1535
1536 ret = num;
1537 break;
1538 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
1539 /* Returns the size of the copied struct. */
1540 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1541 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1542
1543 memcpy(&(data->rcvinfo), ptr, num);
1544 break;
1545 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
1546 /* Returns the size of the copied struct. */
1547 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1548 num = sizeof(struct bio_dgram_sctp_prinfo);
1549
1550 memcpy(ptr, &(data->prinfo), num);
1551 ret = num;
1552 break;
1553 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
1554 /* Returns the size of the copied struct. */
1555 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1556 num = sizeof(struct bio_dgram_sctp_prinfo);
1557
1558 memcpy(&(data->prinfo), ptr, num);
1559 break;
1560 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
1561 /* Returns always 1. */
1562 if (num > 0)
1563 data->save_shutdown = 1;
1564 else
1565 data->save_shutdown = 0;
1566 break;
c8edb04f 1567 case BIO_CTRL_DGRAM_SCTP_WAIT_FOR_DRY:
1568 return dgram_sctp_wait_for_dry(b);
1569 case BIO_CTRL_DGRAM_SCTP_MSG_WAITING:
1570 return dgram_sctp_msg_waiting(b);
0f113f3e
MC		 1571
1572 default:
1573 /*
1574 * Pass to default ctrl function to process SCTP unspecific commands
1575 */
1576 ret = dgram_ctrl(b, cmd, num, ptr);
1577 break;
1578 }
26a7d938 1579 return ret;
0f113f3e 1580}
7e159e01
DSH		 1581
1582int BIO_dgram_sctp_notification_cb(BIO *b,
c8edb04f 1583 BIO_dgram_sctp_notification_handler_fn handle_notifications,
1584 void *context)
0f113f3e
MC		 1585{
1586 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
7e159e01 1587
0f113f3e
MC		 1588 if (handle_notifications != NULL) {
1589 data->handle_notifications = handle_notifications;
1590 data->notification_context = context;
1591 } else
1592 return -1;
7e159e01 1593
0f113f3e
MC		 1594 return 0;
1595}
7e159e01 1596
03a1c850
KR		 1597/*
1598 * BIO_dgram_sctp_wait_for_dry - Wait for SCTP SENDER_DRY event
1599 * @b: The BIO to check for the dry event
1600 *
1601 * Wait until the peer confirms all packets have been received, and so that
1602 * our kernel doesn't have anything to send anymore. This is only received by
1603 * the peer's kernel, not the application.
1604 *
1605 * Returns:
1606 * -1 on error
1607 * 0 when not dry yet
1608 * 1 when dry
1609 */
7e159e01 1610int BIO_dgram_sctp_wait_for_dry(BIO *b)
c8edb04f 1611{
1612 return (int)BIO_ctrl(b, BIO_CTRL_DGRAM_SCTP_WAIT_FOR_DRY, 0, NULL);
1613}
1614
1615static int dgram_sctp_wait_for_dry(BIO *b)
7e159e01 1616{
0f113f3e 1617 int is_dry = 0;
4eacfade
BL		 1618 int sockflags = 0;
1619 int n, ret;
0f113f3e
MC		 1620 union sctp_notification snp;
1621 struct msghdr msg;
1622 struct iovec iov;
1623# ifdef SCTP_EVENT
1624 struct sctp_event event;
1625# else
1626 struct sctp_event_subscribe event;
1627 socklen_t eventsize;
1628# endif
1629 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1630
1631 /* set sender dry event */
1632# ifdef SCTP_EVENT
16f8d4eb 1633 memset(&event, 0, sizeof(event));
0f113f3e
MC		 1634 event.se_assoc_id = 0;
1635 event.se_type = SCTP_SENDER_DRY_EVENT;
1636 event.se_on = 1;
1637 ret =
1638 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1639 sizeof(struct sctp_event));
1640# else
1641 eventsize = sizeof(struct sctp_event_subscribe);
1642 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1643 if (ret < 0)
1644 return -1;
1645
1646 event.sctp_sender_dry_event = 1;
1647
1648 ret =
1649 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1650 sizeof(struct sctp_event_subscribe));
1651# endif
1652 if (ret < 0)
1653 return -1;
1654
1655 /* peek for notification */
16f8d4eb 1656 memset(&snp, 0, sizeof(snp));
0f113f3e
MC		 1657 iov.iov_base = (char *)&snp;
1658 iov.iov_len = sizeof(union sctp_notification);
1659 msg.msg_name = NULL;
1660 msg.msg_namelen = 0;
1661 msg.msg_iov = &iov;
1662 msg.msg_iovlen = 1;
1663 msg.msg_control = NULL;
1664 msg.msg_controllen = 0;
1665 msg.msg_flags = 0;
1666
1667 n = recvmsg(b->num, &msg, MSG_PEEK);
1668 if (n <= 0) {
1669 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1670 && (get_last_socket_error() != EWOULDBLOCK))
1671 return -1;
1672 else
1673 return 0;
1674 }
1675
1676 /* if we find a notification, process it and try again if necessary */
1677 while (msg.msg_flags & MSG_NOTIFICATION) {
16f8d4eb 1678 memset(&snp, 0, sizeof(snp));
0f113f3e
MC		 1679 iov.iov_base = (char *)&snp;
1680 iov.iov_len = sizeof(union sctp_notification);
1681 msg.msg_name = NULL;
1682 msg.msg_namelen = 0;
1683 msg.msg_iov = &iov;
1684 msg.msg_iovlen = 1;
1685 msg.msg_control = NULL;
1686 msg.msg_controllen = 0;
1687 msg.msg_flags = 0;
1688
1689 n = recvmsg(b->num, &msg, 0);
1690 if (n <= 0) {
1691 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1692 && (get_last_socket_error() != EWOULDBLOCK))
1693 return -1;
1694 else
1695 return is_dry;
1696 }
1697
1698 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1699 is_dry = 1;
1700
1701 /* disable sender dry event */
1702# ifdef SCTP_EVENT
16f8d4eb 1703 memset(&event, 0, sizeof(event));
0f113f3e
MC		 1704 event.se_assoc_id = 0;
1705 event.se_type = SCTP_SENDER_DRY_EVENT;
1706 event.se_on = 0;
1707 ret =
1708 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1709 sizeof(struct sctp_event));
1710# else
1711 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
1712 ret =
1713 getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1714 &eventsize);
1715 if (ret < 0)
1716 return -1;
1717
1718 event.sctp_sender_dry_event = 0;
1719
1720 ret =
1721 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1722 sizeof(struct sctp_event_subscribe));
1723# endif
1724 if (ret < 0)
1725 return -1;
1726 }
1727# ifdef SCTP_AUTHENTICATION_EVENT
1728 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1729 dgram_sctp_handle_auth_free_key_event(b, &snp);
1730# endif
7e159e01 1731
0f113f3e
MC		 1732 if (data->handle_notifications != NULL)
1733 data->handle_notifications(b, data->notification_context,
1734 (void *)&snp);
1735
1736 /* found notification, peek again */
16f8d4eb 1737 memset(&snp, 0, sizeof(snp));
0f113f3e
MC		 1738 iov.iov_base = (char *)&snp;
1739 iov.iov_len = sizeof(union sctp_notification);
1740 msg.msg_name = NULL;
1741 msg.msg_namelen = 0;
1742 msg.msg_iov = &iov;
1743 msg.msg_iovlen = 1;
1744 msg.msg_control = NULL;
1745 msg.msg_controllen = 0;
1746 msg.msg_flags = 0;
1747
1748 /* if we have seen the dry already, don't wait */
1749 if (is_dry) {
1750 sockflags = fcntl(b->num, F_GETFL, 0);
1751 fcntl(b->num, F_SETFL, O_NONBLOCK);
1752 }
1753
1754 n = recvmsg(b->num, &msg, MSG_PEEK);
1755
1756 if (is_dry) {
1757 fcntl(b->num, F_SETFL, sockflags);
1758 }
1759
1760 if (n <= 0) {
1761 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1762 && (get_last_socket_error() != EWOULDBLOCK))
1763 return -1;
1764 else
1765 return is_dry;
1766 }
1767 }
1768
1769 /* read anything else */
1770 return is_dry;
7e159e01
DSH		 1771}
1772
1773int BIO_dgram_sctp_msg_waiting(BIO *b)
c8edb04f 1774{
1775 return (int)BIO_ctrl(b, BIO_CTRL_DGRAM_SCTP_MSG_WAITING, 0, NULL);
1776}
1777
1778static int dgram_sctp_msg_waiting(BIO *b)
0f113f3e
MC		 1779{
1780 int n, sockflags;
1781 union sctp_notification snp;
1782 struct msghdr msg;
1783 struct iovec iov;
1784 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1785
1786 /* Check if there are any messages waiting to be read */
1787 do {
16f8d4eb 1788 memset(&snp, 0, sizeof(snp));
0f113f3e
MC		 1789 iov.iov_base = (char *)&snp;
1790 iov.iov_len = sizeof(union sctp_notification);
1791 msg.msg_name = NULL;
1792 msg.msg_namelen = 0;
1793 msg.msg_iov = &iov;
1794 msg.msg_iovlen = 1;
1795 msg.msg_control = NULL;
1796 msg.msg_controllen = 0;
1797 msg.msg_flags = 0;
1798
1799 sockflags = fcntl(b->num, F_GETFL, 0);
1800 fcntl(b->num, F_SETFL, O_NONBLOCK);
1801 n = recvmsg(b->num, &msg, MSG_PEEK);
1802 fcntl(b->num, F_SETFL, sockflags);
1803
1804 /* if notification, process and try again */
1805 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION)) {
1806# ifdef SCTP_AUTHENTICATION_EVENT
1807 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1808 dgram_sctp_handle_auth_free_key_event(b, &snp);
1809# endif
7e159e01 1810
16f8d4eb 1811 memset(&snp, 0, sizeof(snp));
0f113f3e
MC		 1812 iov.iov_base = (char *)&snp;
1813 iov.iov_len = sizeof(union sctp_notification);
1814 msg.msg_name = NULL;
1815 msg.msg_namelen = 0;
1816 msg.msg_iov = &iov;
1817 msg.msg_iovlen = 1;
1818 msg.msg_control = NULL;
1819 msg.msg_controllen = 0;
1820 msg.msg_flags = 0;
1821 n = recvmsg(b->num, &msg, 0);
1822
1823 if (data->handle_notifications != NULL)
1824 data->handle_notifications(b, data->notification_context,
1825 (void *)&snp);
1826 }
1827
1828 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
1829
1830 /* Return 1 if there is a message to be read, return 0 otherwise. */
1831 if (n > 0)
1832 return 1;
1833 else
1834 return 0;
1835}
7e159e01
DSH		 1836
1837static int dgram_sctp_puts(BIO *bp, const char *str)
0f113f3e
MC		 1838{
1839 int n, ret;
7e159e01 1840
0f113f3e
MC		 1841 n = strlen(str);
1842 ret = dgram_sctp_write(bp, str, n);
26a7d938 1843 return ret;
0f113f3e
MC		 1844}
1845# endif
7e159e01 1846
b3e72fc3 1847static int BIO_dgram_should_retry(int i)
0f113f3e
MC		 1848{
1849 int err;
36d16f8e 1850
0f113f3e
MC		 1851 if ((i == 0) || (i == -1)) {
1852 err = get_last_socket_error();
36d16f8e 1853
0f113f3e
MC		 1854# if defined(OPENSSL_SYS_WINDOWS)
1855 /*
1856 * If the socket return value (i) is -1 and err is unexpectedly 0 at
1857 * this point, the error code was overwritten by another system call
1858 * before this error handling is called.
1859 */
36d16f8e
BL		 1860# endif
1861
26a7d938 1862 return BIO_dgram_non_fatal_error(err);
0f113f3e 1863 }
26a7d938 1864 return 0;
0f113f3e
MC		 1865}
1866
1867int BIO_dgram_non_fatal_error(int err)
1868{
1869 switch (err) {
1870# if defined(OPENSSL_SYS_WINDOWS)
1871# if defined(WSAEWOULDBLOCK)
1872 case WSAEWOULDBLOCK:
1873# endif
36d16f8e 1874# endif
36d16f8e 1875
0f113f3e
MC		 1876# ifdef EWOULDBLOCK
1877# ifdef WSAEWOULDBLOCK
1878# if WSAEWOULDBLOCK != EWOULDBLOCK
1879 case EWOULDBLOCK:
1880# endif
1881# else
1882 case EWOULDBLOCK:
36d16f8e 1883# endif
36d16f8e 1884# endif
36d16f8e 1885
0f113f3e
MC		 1886# ifdef EINTR
1887 case EINTR:
1888# endif
36d16f8e 1889
0f113f3e
MC		 1890# ifdef EAGAIN
1891# if EWOULDBLOCK != EAGAIN
1892 case EAGAIN:
1893# endif
36d16f8e 1894# endif
36d16f8e 1895
0f113f3e
MC		 1896# ifdef EPROTO
1897 case EPROTO:
1898# endif
36d16f8e 1899
0f113f3e
MC		 1900# ifdef EINPROGRESS
1901 case EINPROGRESS:
1902# endif
36d16f8e 1903
0f113f3e
MC		 1904# ifdef EALREADY
1905 case EALREADY:
1906# endif
36d16f8e 1907
208fb891 1908 return 1;
0f113f3e
MC		 1909 default:
1910 break;
1911 }
26a7d938 1912 return 0;
0f113f3e 1913}
5d6a0179
RL		 1914
1915static void get_current_time(struct timeval *t)
0f113f3e
MC		 1916{
1917# if defined(_WIN32)
1918 SYSTEMTIME st;
1919 union {
1920 unsigned __int64 ul;
1921 FILETIME ft;
1922 } now;
1923
1924 GetSystemTime(&st);
1925 SystemTimeToFileTime(&st, &now.ft);
1926# ifdef __MINGW32__
1927 now.ul -= 116444736000000000ULL;
1928# else
d2a0d72f 1929 now.ul -= 116444736000000000UI64; /* re-bias to 1/1/1970 */
0f113f3e
MC		 1930# endif
1931 t->tv_sec = (long)(now.ul / 10000000);
1932 t->tv_usec = ((int)(now.ul % 10000000)) / 10;
0f113f3e
MC		 1933# else
1934 gettimeofday(t, NULL);
1935# endif
1936}
74e056ed
DSH		 1937
1938#endif
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