1 /* crypto/bio/bio_dgram.c */
2 /*
3 * DTLS implementation written by Nagendra Modadugu
4 * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
5 */
6 /* ====================================================================
7 * Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 *
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * openssl-core@OpenSSL.org.
30 *
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 * acknowledgment:
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
53 *
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
57 *
58 */
59
60 #include <stdio.h>
61 #include <errno.h>
62 #define USE_SOCKETS
63 #include "cryptlib.h"
64
65 #include <openssl/bio.h>
66 #ifndef OPENSSL_NO_DGRAM
67
68 # if defined(OPENSSL_SYS_VMS)
69 # include <sys/timeb.h>
70 # endif
71
72 # ifndef OPENSSL_NO_SCTP
73 # include <netinet/sctp.h>
74 # include <fcntl.h>
75 # define OPENSSL_SCTP_DATA_CHUNK_TYPE 0x00
76 # define OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE 0xc0
77 # endif
78
79 # if defined(OPENSSL_SYS_LINUX) && !defined(IP_MTU)
80 # define IP_MTU 14 /* linux is lame */
81 # endif
82
83 # if OPENSSL_USE_IPV6 && !defined(IPPROTO_IPV6)
84 # define IPPROTO_IPV6 41 /* windows is lame */
85 # endif
86
87 # if defined(__FreeBSD__) && defined(IN6_IS_ADDR_V4MAPPED)
88 /* Standard definition causes type-punning problems. */
89 # undef IN6_IS_ADDR_V4MAPPED
90 # define s6_addr32 __u6_addr.__u6_addr32
91 # define IN6_IS_ADDR_V4MAPPED(a) \
92 (((a)->s6_addr32[0] == 0) && \
93 ((a)->s6_addr32[1] == 0) && \
94 ((a)->s6_addr32[2] == htonl(0x0000ffff)))
95 # endif
96
97 # ifdef WATT32
98 # define sock_write SockWrite /* Watt-32 uses same names */
99 # define sock_read SockRead
100 # define sock_puts SockPuts
101 # endif
102
103 static int dgram_write(BIO *h, const char *buf, int num);
104 static int dgram_read(BIO *h, char *buf, int size);
105 static int dgram_puts(BIO *h, const char *str);
106 static long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2);
107 static int dgram_new(BIO *h);
108 static int dgram_free(BIO *data);
109 static int dgram_clear(BIO *bio);
110
111 # ifndef OPENSSL_NO_SCTP
112 static int dgram_sctp_write(BIO *h, const char *buf, int num);
113 static int dgram_sctp_read(BIO *h, char *buf, int size);
114 static int dgram_sctp_puts(BIO *h, const char *str);
115 static long dgram_sctp_ctrl(BIO *h, int cmd, long arg1, void *arg2);
116 static int dgram_sctp_new(BIO *h);
117 static int dgram_sctp_free(BIO *data);
118 # ifdef SCTP_AUTHENTICATION_EVENT
119 static void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification
120 *snp);
121 # endif
122 # endif
123
124 static int BIO_dgram_should_retry(int s);
125
126 static void get_current_time(struct timeval *t);
127
128 static BIO_METHOD methods_dgramp = {
129 BIO_TYPE_DGRAM,
130 "datagram socket",
131 dgram_write,
132 dgram_read,
133 dgram_puts,
134 NULL, /* dgram_gets, */
135 dgram_ctrl,
136 dgram_new,
137 dgram_free,
138 NULL,
139 };
140
141 # ifndef OPENSSL_NO_SCTP
142 static BIO_METHOD methods_dgramp_sctp = {
143 BIO_TYPE_DGRAM_SCTP,
144 "datagram sctp socket",
145 dgram_sctp_write,
146 dgram_sctp_read,
147 dgram_sctp_puts,
148 NULL, /* dgram_gets, */
149 dgram_sctp_ctrl,
150 dgram_sctp_new,
151 dgram_sctp_free,
152 NULL,
153 };
154 # endif
155
156 typedef struct bio_dgram_data_st {
157 union {
158 struct sockaddr sa;
159 struct sockaddr_in sa_in;
160 # if OPENSSL_USE_IPV6
161 struct sockaddr_in6 sa_in6;
162 # endif
163 } peer;
164 unsigned int connected;
165 unsigned int _errno;
166 unsigned int mtu;
167 struct timeval next_timeout;
168 struct timeval socket_timeout;
169 } bio_dgram_data;
170
171 # ifndef OPENSSL_NO_SCTP
172 typedef struct bio_dgram_sctp_save_message_st {
173 BIO *bio;
174 char *data;
175 int length;
176 } bio_dgram_sctp_save_message;
177
178 typedef struct bio_dgram_sctp_data_st {
179 union {
180 struct sockaddr sa;
181 struct sockaddr_in sa_in;
182 # if OPENSSL_USE_IPV6
183 struct sockaddr_in6 sa_in6;
184 # endif
185 } peer;
186 unsigned int connected;
187 unsigned int _errno;
188 unsigned int mtu;
189 struct bio_dgram_sctp_sndinfo sndinfo;
190 struct bio_dgram_sctp_rcvinfo rcvinfo;
191 struct bio_dgram_sctp_prinfo prinfo;
192 void (*handle_notifications) (BIO *bio, void *context, void *buf);
193 void *notification_context;
194 int in_handshake;
195 int ccs_rcvd;
196 int ccs_sent;
197 int save_shutdown;
198 int peer_auth_tested;
199 bio_dgram_sctp_save_message saved_message;
200 } bio_dgram_sctp_data;
201 # endif
202
BIO_s_datagram(void)203 BIO_METHOD *BIO_s_datagram(void)
204 {
205 return (&methods_dgramp);
206 }
207
BIO_new_dgram(int fd,int close_flag)208 BIO *BIO_new_dgram(int fd, int close_flag)
209 {
210 BIO *ret;
211
212 ret = BIO_new(BIO_s_datagram());
213 if (ret == NULL)
214 return (NULL);
215 BIO_set_fd(ret, fd, close_flag);
216 return (ret);
217 }
218
dgram_new(BIO * bi)219 static int dgram_new(BIO *bi)
220 {
221 bio_dgram_data *data = NULL;
222
223 bi->init = 0;
224 bi->num = 0;
225 data = OPENSSL_malloc(sizeof(bio_dgram_data));
226 if (data == NULL)
227 return 0;
228 memset(data, 0x00, sizeof(bio_dgram_data));
229 bi->ptr = data;
230
231 bi->flags = 0;
232 return (1);
233 }
234
dgram_free(BIO * a)235 static int dgram_free(BIO *a)
236 {
237 bio_dgram_data *data;
238
239 if (a == NULL)
240 return (0);
241 if (!dgram_clear(a))
242 return 0;
243
244 data = (bio_dgram_data *)a->ptr;
245 if (data != NULL)
246 OPENSSL_free(data);
247
248 return (1);
249 }
250
dgram_clear(BIO * a)251 static int dgram_clear(BIO *a)
252 {
253 if (a == NULL)
254 return (0);
255 if (a->shutdown) {
256 if (a->init) {
257 SHUTDOWN2(a->num);
258 }
259 a->init = 0;
260 a->flags = 0;
261 }
262 return (1);
263 }
264
dgram_adjust_rcv_timeout(BIO * b)265 static void dgram_adjust_rcv_timeout(BIO *b)
266 {
267 # if defined(SO_RCVTIMEO)
268 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
269 union {
270 size_t s;
271 int i;
272 } sz = {
273 0
274 };
275
276 /* Is a timer active? */
277 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
278 struct timeval timenow, timeleft;
279
280 /* Read current socket timeout */
281 # ifdef OPENSSL_SYS_WINDOWS
282 int timeout;
283
284 sz.i = sizeof(timeout);
285 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
286 (void *)&timeout, &sz.i) < 0) {
287 perror("getsockopt");
288 } else {
289 data->socket_timeout.tv_sec = timeout / 1000;
290 data->socket_timeout.tv_usec = (timeout % 1000) * 1000;
291 }
292 # else
293 sz.i = sizeof(data->socket_timeout);
294 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
295 &(data->socket_timeout), (void *)&sz) < 0) {
296 perror("getsockopt");
297 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0)
298 OPENSSL_assert(sz.s <= sizeof(data->socket_timeout));
299 # endif
300
301 /* Get current time */
302 get_current_time(&timenow);
303
304 /* Calculate time left until timer expires */
305 memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval));
306 if (timeleft.tv_usec < timenow.tv_usec) {
307 timeleft.tv_usec = 1000000 - timenow.tv_usec + timeleft.tv_usec;
308 timeleft.tv_sec--;
309 } else {
310 timeleft.tv_usec -= timenow.tv_usec;
311 }
312 if (timeleft.tv_sec < timenow.tv_sec) {
313 timeleft.tv_sec = 0;
314 timeleft.tv_usec = 1;
315 } else {
316 timeleft.tv_sec -= timenow.tv_sec;
317 }
318
319 /*
320 * Adjust socket timeout if next handhake message timer will expire
321 * earlier.
322 */
323 if ((data->socket_timeout.tv_sec == 0
324 && data->socket_timeout.tv_usec == 0)
325 || (data->socket_timeout.tv_sec > timeleft.tv_sec)
326 || (data->socket_timeout.tv_sec == timeleft.tv_sec
327 && data->socket_timeout.tv_usec >= timeleft.tv_usec)) {
328 # ifdef OPENSSL_SYS_WINDOWS
329 timeout = timeleft.tv_sec * 1000 + timeleft.tv_usec / 1000;
330 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
331 (void *)&timeout, sizeof(timeout)) < 0) {
332 perror("setsockopt");
333 }
334 # else
335 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &timeleft,
336 sizeof(struct timeval)) < 0) {
337 perror("setsockopt");
338 }
339 # endif
340 }
341 }
342 # endif
343 }
344
dgram_reset_rcv_timeout(BIO * b)345 static void dgram_reset_rcv_timeout(BIO *b)
346 {
347 # if defined(SO_RCVTIMEO)
348 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
349
350 /* Is a timer active? */
351 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
352 # ifdef OPENSSL_SYS_WINDOWS
353 int timeout = data->socket_timeout.tv_sec * 1000 +
354 data->socket_timeout.tv_usec / 1000;
355 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
356 (void *)&timeout, sizeof(timeout)) < 0) {
357 perror("setsockopt");
358 }
359 # else
360 if (setsockopt
361 (b->num, SOL_SOCKET, SO_RCVTIMEO, &(data->socket_timeout),
362 sizeof(struct timeval)) < 0) {
363 perror("setsockopt");
364 }
365 # endif
366 }
367 # endif
368 }
369
dgram_read(BIO * b,char * out,int outl)370 static int dgram_read(BIO *b, char *out, int outl)
371 {
372 int ret = 0;
373 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
374
375 struct {
376 /*
377 * See commentary in b_sock.c. <appro>
378 */
379 union {
380 size_t s;
381 int i;
382 } len;
383 union {
384 struct sockaddr sa;
385 struct sockaddr_in sa_in;
386 # if OPENSSL_USE_IPV6
387 struct sockaddr_in6 sa_in6;
388 # endif
389 } peer;
390 } sa;
391
392 sa.len.s = 0;
393 sa.len.i = sizeof(sa.peer);
394
395 if (out != NULL) {
396 clear_socket_error();
397 memset(&sa.peer, 0x00, sizeof(sa.peer));
398 dgram_adjust_rcv_timeout(b);
399 ret = recvfrom(b->num, out, outl, 0, &sa.peer.sa, (void *)&sa.len);
400 if (sizeof(sa.len.i) != sizeof(sa.len.s) && sa.len.i == 0) {
401 OPENSSL_assert(sa.len.s <= sizeof(sa.peer));
402 sa.len.i = (int)sa.len.s;
403 }
404
405 if (!data->connected && ret >= 0)
406 BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &sa.peer);
407
408 BIO_clear_retry_flags(b);
409 if (ret < 0) {
410 if (BIO_dgram_should_retry(ret)) {
411 BIO_set_retry_read(b);
412 data->_errno = get_last_socket_error();
413 }
414 }
415
416 dgram_reset_rcv_timeout(b);
417 }
418 return (ret);
419 }
420
dgram_write(BIO * b,const char * in,int inl)421 static int dgram_write(BIO *b, const char *in, int inl)
422 {
423 int ret;
424 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
425 clear_socket_error();
426
427 if (data->connected)
428 ret = writesocket(b->num, in, inl);
429 else {
430 int peerlen = sizeof(data->peer);
431
432 if (data->peer.sa.sa_family == AF_INET)
433 peerlen = sizeof(data->peer.sa_in);
434 # if OPENSSL_USE_IPV6
435 else if (data->peer.sa.sa_family == AF_INET6)
436 peerlen = sizeof(data->peer.sa_in6);
437 # endif
438 # if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK)
439 ret = sendto(b->num, (char *)in, inl, 0, &data->peer.sa, peerlen);
440 # else
441 ret = sendto(b->num, in, inl, 0, &data->peer.sa, peerlen);
442 # endif
443 }
444
445 BIO_clear_retry_flags(b);
446 if (ret <= 0) {
447 if (BIO_dgram_should_retry(ret)) {
448 BIO_set_retry_write(b);
449 data->_errno = get_last_socket_error();
450
451 # if 0 /* higher layers are responsible for querying
452 * MTU, if necessary */
453 if (data->_errno == EMSGSIZE)
454 /* retrieve the new MTU */
455 BIO_ctrl(b, BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL);
456 # endif
457 }
458 }
459 return (ret);
460 }
461
dgram_get_mtu_overhead(bio_dgram_data * data)462 static long dgram_get_mtu_overhead(bio_dgram_data *data)
463 {
464 long ret;
465
466 switch (data->peer.sa.sa_family) {
467 case AF_INET:
468 /*
469 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
470 */
471 ret = 28;
472 break;
473 # if OPENSSL_USE_IPV6
474 case AF_INET6:
475 # ifdef IN6_IS_ADDR_V4MAPPED
476 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
477 /*
478 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
479 */
480 ret = 28;
481 else
482 # endif
483 /*
484 * Assume this is UDP - 40 bytes for IP, 8 bytes for UDP
485 */
486 ret = 48;
487 break;
488 # endif
489 default:
490 /* We don't know. Go with the historical default */
491 ret = 28;
492 break;
493 }
494 return ret;
495 }
496
dgram_ctrl(BIO * b,int cmd,long num,void * ptr)497 static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
498 {
499 long ret = 1;
500 int *ip;
501 struct sockaddr *to = NULL;
502 bio_dgram_data *data = NULL;
503 int sockopt_val = 0;
504 # if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
505 socklen_t sockopt_len; /* assume that system supporting IP_MTU is
506 * modern enough to define socklen_t */
507 socklen_t addr_len;
508 union {
509 struct sockaddr sa;
510 struct sockaddr_in s4;
511 # if OPENSSL_USE_IPV6
512 struct sockaddr_in6 s6;
513 # endif
514 } addr;
515 # endif
516
517 data = (bio_dgram_data *)b->ptr;
518
519 switch (cmd) {
520 case BIO_CTRL_RESET:
521 num = 0;
522 ret = 0;
523 break;
524 case BIO_CTRL_INFO:
525 ret = 0;
526 break;
527 case BIO_C_SET_FD:
528 dgram_clear(b);
529 b->num = *((int *)ptr);
530 b->shutdown = (int)num;
531 b->init = 1;
532 break;
533 case BIO_C_GET_FD:
534 if (b->init) {
535 ip = (int *)ptr;
536 if (ip != NULL)
537 *ip = b->num;
538 ret = b->num;
539 } else
540 ret = -1;
541 break;
542 case BIO_CTRL_GET_CLOSE:
543 ret = b->shutdown;
544 break;
545 case BIO_CTRL_SET_CLOSE:
546 b->shutdown = (int)num;
547 break;
548 case BIO_CTRL_PENDING:
549 case BIO_CTRL_WPENDING:
550 ret = 0;
551 break;
552 case BIO_CTRL_DUP:
553 case BIO_CTRL_FLUSH:
554 ret = 1;
555 break;
556 case BIO_CTRL_DGRAM_CONNECT:
557 to = (struct sockaddr *)ptr;
558 # if 0
559 if (connect(b->num, to, sizeof(struct sockaddr)) < 0) {
560 perror("connect");
561 ret = 0;
562 } else {
563 # endif
564 switch (to->sa_family) {
565 case AF_INET:
566 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
567 break;
568 # if OPENSSL_USE_IPV6
569 case AF_INET6:
570 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
571 break;
572 # endif
573 default:
574 memcpy(&data->peer, to, sizeof(data->peer.sa));
575 break;
576 }
577 # if 0
578 }
579 # endif
580 break;
581 /* (Linux)kernel sets DF bit on outgoing IP packets */
582 case BIO_CTRL_DGRAM_MTU_DISCOVER:
583 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
584 addr_len = (socklen_t) sizeof(addr);
585 memset((void *)&addr, 0, sizeof(addr));
586 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
587 ret = 0;
588 break;
589 }
590 switch (addr.sa.sa_family) {
591 case AF_INET:
592 sockopt_val = IP_PMTUDISC_DO;
593 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
594 &sockopt_val, sizeof(sockopt_val))) < 0)
595 perror("setsockopt");
596 break;
597 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
598 case AF_INET6:
599 sockopt_val = IPV6_PMTUDISC_DO;
600 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
601 &sockopt_val, sizeof(sockopt_val))) < 0)
602 perror("setsockopt");
603 break;
604 # endif
605 default:
606 ret = -1;
607 break;
608 }
609 ret = -1;
610 # else
611 break;
612 # endif
613 case BIO_CTRL_DGRAM_QUERY_MTU:
614 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU)
615 addr_len = (socklen_t) sizeof(addr);
616 memset((void *)&addr, 0, sizeof(addr));
617 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
618 ret = 0;
619 break;
620 }
621 sockopt_len = sizeof(sockopt_val);
622 switch (addr.sa.sa_family) {
623 case AF_INET:
624 if ((ret =
625 getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
626 &sockopt_len)) < 0 || sockopt_val < 0) {
627 ret = 0;
628 } else {
629 /*
630 * we assume that the transport protocol is UDP and no IP
631 * options are used.
632 */
633 data->mtu = sockopt_val - 8 - 20;
634 ret = data->mtu;
635 }
636 break;
637 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU)
638 case AF_INET6:
639 if ((ret =
640 getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU,
641 (void *)&sockopt_val, &sockopt_len)) < 0
642 || sockopt_val < 0) {
643 ret = 0;
644 } else {
645 /*
646 * we assume that the transport protocol is UDP and no IPV6
647 * options are used.
648 */
649 data->mtu = sockopt_val - 8 - 40;
650 ret = data->mtu;
651 }
652 break;
653 # endif
654 default:
655 ret = 0;
656 break;
657 }
658 # else
659 ret = 0;
660 # endif
661 break;
662 case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
663 ret = -dgram_get_mtu_overhead(data);
664 switch (data->peer.sa.sa_family) {
665 case AF_INET:
666 ret += 576;
667 break;
668 # if OPENSSL_USE_IPV6
669 case AF_INET6:
670 # ifdef IN6_IS_ADDR_V4MAPPED
671 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
672 ret += 576;
673 else
674 # endif
675 ret += 1280;
676 break;
677 # endif
678 default:
679 ret += 576;
680 break;
681 }
682 break;
683 case BIO_CTRL_DGRAM_GET_MTU:
684 return data->mtu;
685 break;
686 case BIO_CTRL_DGRAM_SET_MTU:
687 data->mtu = num;
688 ret = num;
689 break;
690 case BIO_CTRL_DGRAM_SET_CONNECTED:
691 to = (struct sockaddr *)ptr;
692
693 if (to != NULL) {
694 data->connected = 1;
695 switch (to->sa_family) {
696 case AF_INET:
697 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
698 break;
699 # if OPENSSL_USE_IPV6
700 case AF_INET6:
701 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
702 break;
703 # endif
704 default:
705 memcpy(&data->peer, to, sizeof(data->peer.sa));
706 break;
707 }
708 } else {
709 data->connected = 0;
710 memset(&(data->peer), 0x00, sizeof(data->peer));
711 }
712 break;
713 case BIO_CTRL_DGRAM_GET_PEER:
714 switch (data->peer.sa.sa_family) {
715 case AF_INET:
716 ret = sizeof(data->peer.sa_in);
717 break;
718 # if OPENSSL_USE_IPV6
719 case AF_INET6:
720 ret = sizeof(data->peer.sa_in6);
721 break;
722 # endif
723 default:
724 ret = sizeof(data->peer.sa);
725 break;
726 }
727 if (num == 0 || num > ret)
728 num = ret;
729 memcpy(ptr, &data->peer, (ret = num));
730 break;
731 case BIO_CTRL_DGRAM_SET_PEER:
732 to = (struct sockaddr *)ptr;
733 switch (to->sa_family) {
734 case AF_INET:
735 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
736 break;
737 # if OPENSSL_USE_IPV6
738 case AF_INET6:
739 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
740 break;
741 # endif
742 default:
743 memcpy(&data->peer, to, sizeof(data->peer.sa));
744 break;
745 }
746 break;
747 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
748 memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
749 break;
750 # if defined(SO_RCVTIMEO)
751 case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
752 # ifdef OPENSSL_SYS_WINDOWS
753 {
754 struct timeval *tv = (struct timeval *)ptr;
755 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
756 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
757 (void *)&timeout, sizeof(timeout)) < 0) {
758 perror("setsockopt");
759 ret = -1;
760 }
761 }
762 # else
763 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
764 sizeof(struct timeval)) < 0) {
765 perror("setsockopt");
766 ret = -1;
767 }
768 # endif
769 break;
770 case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
771 {
772 union {
773 size_t s;
774 int i;
775 } sz = {
776 0
777 };
778 # ifdef OPENSSL_SYS_WINDOWS
779 int timeout;
780 struct timeval *tv = (struct timeval *)ptr;
781
782 sz.i = sizeof(timeout);
783 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
784 (void *)&timeout, &sz.i) < 0) {
785 perror("getsockopt");
786 ret = -1;
787 } else {
788 tv->tv_sec = timeout / 1000;
789 tv->tv_usec = (timeout % 1000) * 1000;
790 ret = sizeof(*tv);
791 }
792 # else
793 sz.i = sizeof(struct timeval);
794 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
795 ptr, (void *)&sz) < 0) {
796 perror("getsockopt");
797 ret = -1;
798 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
799 OPENSSL_assert(sz.s <= sizeof(struct timeval));
800 ret = (int)sz.s;
801 } else
802 ret = sz.i;
803 # endif
804 }
805 break;
806 # endif
807 # if defined(SO_SNDTIMEO)
808 case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
809 # ifdef OPENSSL_SYS_WINDOWS
810 {
811 struct timeval *tv = (struct timeval *)ptr;
812 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
813 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
814 (void *)&timeout, sizeof(timeout)) < 0) {
815 perror("setsockopt");
816 ret = -1;
817 }
818 }
819 # else
820 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
821 sizeof(struct timeval)) < 0) {
822 perror("setsockopt");
823 ret = -1;
824 }
825 # endif
826 break;
827 case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
828 {
829 union {
830 size_t s;
831 int i;
832 } sz = {
833 0
834 };
835 # ifdef OPENSSL_SYS_WINDOWS
836 int timeout;
837 struct timeval *tv = (struct timeval *)ptr;
838
839 sz.i = sizeof(timeout);
840 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
841 (void *)&timeout, &sz.i) < 0) {
842 perror("getsockopt");
843 ret = -1;
844 } else {
845 tv->tv_sec = timeout / 1000;
846 tv->tv_usec = (timeout % 1000) * 1000;
847 ret = sizeof(*tv);
848 }
849 # else
850 sz.i = sizeof(struct timeval);
851 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
852 ptr, (void *)&sz) < 0) {
853 perror("getsockopt");
854 ret = -1;
855 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
856 OPENSSL_assert(sz.s <= sizeof(struct timeval));
857 ret = (int)sz.s;
858 } else
859 ret = sz.i;
860 # endif
861 }
862 break;
863 # endif
864 case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
865 /* fall-through */
866 case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
867 # ifdef OPENSSL_SYS_WINDOWS
868 if (data->_errno == WSAETIMEDOUT)
869 # else
870 if (data->_errno == EAGAIN)
871 # endif
872 {
873 ret = 1;
874 data->_errno = 0;
875 } else
876 ret = 0;
877 break;
878 # ifdef EMSGSIZE
879 case BIO_CTRL_DGRAM_MTU_EXCEEDED:
880 if (data->_errno == EMSGSIZE) {
881 ret = 1;
882 data->_errno = 0;
883 } else
884 ret = 0;
885 break;
886 # endif
887 case BIO_CTRL_DGRAM_SET_DONT_FRAG:
888 sockopt_val = num ? 1 : 0;
889
890 switch (data->peer.sa.sa_family) {
891 case AF_INET:
892 # if defined(IP_DONTFRAG)
893 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAG,
894 &sockopt_val, sizeof(sockopt_val))) < 0) {
895 perror("setsockopt");
896 ret = -1;
897 }
898 # elif defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined (IP_PMTUDISC_PROBE)
899 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
900 (ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
901 &sockopt_val, sizeof(sockopt_val))) < 0) {
902 perror("setsockopt");
903 ret = -1;
904 }
905 # elif defined(OPENSSL_SYS_WINDOWS) && defined(IP_DONTFRAGMENT)
906 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAGMENT,
907 (const char *)&sockopt_val,
908 sizeof(sockopt_val))) < 0) {
909 perror("setsockopt");
910 ret = -1;
911 }
912 # else
913 ret = -1;
914 # endif
915 break;
916 # if OPENSSL_USE_IPV6
917 case AF_INET6:
918 # if defined(IPV6_DONTFRAG)
919 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_DONTFRAG,
920 (const void *)&sockopt_val,
921 sizeof(sockopt_val))) < 0) {
922 perror("setsockopt");
923 ret = -1;
924 }
925 # elif defined(OPENSSL_SYS_LINUX) && defined(IPV6_MTUDISCOVER)
926 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
927 (ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
928 &sockopt_val, sizeof(sockopt_val))) < 0) {
929 perror("setsockopt");
930 ret = -1;
931 }
932 # else
933 ret = -1;
934 # endif
935 break;
936 # endif
937 default:
938 ret = -1;
939 break;
940 }
941 break;
942 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
943 ret = dgram_get_mtu_overhead(data);
944 break;
945 default:
946 ret = 0;
947 break;
948 }
949 return (ret);
950 }
951
dgram_puts(BIO * bp,const char * str)952 static int dgram_puts(BIO *bp, const char *str)
953 {
954 int n, ret;
955
956 n = strlen(str);
957 ret = dgram_write(bp, str, n);
958 return (ret);
959 }
960
961 # ifndef OPENSSL_NO_SCTP
BIO_s_datagram_sctp(void)962 BIO_METHOD *BIO_s_datagram_sctp(void)
963 {
964 return (&methods_dgramp_sctp);
965 }
966
BIO_new_dgram_sctp(int fd,int close_flag)967 BIO *BIO_new_dgram_sctp(int fd, int close_flag)
968 {
969 BIO *bio;
970 int ret, optval = 20000;
971 int auth_data = 0, auth_forward = 0;
972 unsigned char *p;
973 struct sctp_authchunk auth;
974 struct sctp_authchunks *authchunks;
975 socklen_t sockopt_len;
976 # ifdef SCTP_AUTHENTICATION_EVENT
977 # ifdef SCTP_EVENT
978 struct sctp_event event;
979 # else
980 struct sctp_event_subscribe event;
981 # endif
982 # endif
983
984 bio = BIO_new(BIO_s_datagram_sctp());
985 if (bio == NULL)
986 return (NULL);
987 BIO_set_fd(bio, fd, close_flag);
988
989 /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */
990 auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE;
991 ret =
992 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
993 sizeof(struct sctp_authchunk));
994 if (ret < 0) {
995 BIO_vfree(bio);
996 return (NULL);
997 }
998 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
999 ret =
1000 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
1001 sizeof(struct sctp_authchunk));
1002 if (ret < 0) {
1003 BIO_vfree(bio);
1004 return (NULL);
1005 }
1006
1007 /*
1008 * Test if activation was successful. When using accept(), SCTP-AUTH has
1009 * to be activated for the listening socket already, otherwise the
1010 * connected socket won't use it.
1011 */
1012 sockopt_len = (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1013 authchunks = OPENSSL_malloc(sockopt_len);
1014 if (!authchunks) {
1015 BIO_vfree(bio);
1016 return (NULL);
1017 }
1018 memset(authchunks, 0, sizeof(sockopt_len));
1019 ret =
1020 getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks,
1021 &sockopt_len);
1022
1023 if (ret < 0) {
1024 OPENSSL_free(authchunks);
1025 BIO_vfree(bio);
1026 return (NULL);
1027 }
1028
1029 for (p = (unsigned char *)authchunks->gauth_chunks;
1030 p < (unsigned char *)authchunks + sockopt_len;
1031 p += sizeof(uint8_t)) {
1032 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1033 auth_data = 1;
1034 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1035 auth_forward = 1;
1036 }
1037
1038 OPENSSL_free(authchunks);
1039
1040 OPENSSL_assert(auth_data);
1041 OPENSSL_assert(auth_forward);
1042
1043 # ifdef SCTP_AUTHENTICATION_EVENT
1044 # ifdef SCTP_EVENT
1045 memset(&event, 0, sizeof(struct sctp_event));
1046 event.se_assoc_id = 0;
1047 event.se_type = SCTP_AUTHENTICATION_EVENT;
1048 event.se_on = 1;
1049 ret =
1050 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event,
1051 sizeof(struct sctp_event));
1052 if (ret < 0) {
1053 BIO_vfree(bio);
1054 return (NULL);
1055 }
1056 # else
1057 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
1058 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
1059 if (ret < 0) {
1060 BIO_vfree(bio);
1061 return (NULL);
1062 }
1063
1064 event.sctp_authentication_event = 1;
1065
1066 ret =
1067 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event,
1068 sizeof(struct sctp_event_subscribe));
1069 if (ret < 0) {
1070 BIO_vfree(bio);
1071 return (NULL);
1072 }
1073 # endif
1074 # endif
1075
1076 /*
1077 * Disable partial delivery by setting the min size larger than the max
1078 * record size of 2^14 + 2048 + 13
1079 */
1080 ret =
1081 setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval,
1082 sizeof(optval));
1083 if (ret < 0) {
1084 BIO_vfree(bio);
1085 return (NULL);
1086 }
1087
1088 return (bio);
1089 }
1090
BIO_dgram_is_sctp(BIO * bio)1091 int BIO_dgram_is_sctp(BIO *bio)
1092 {
1093 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
1094 }
1095
dgram_sctp_new(BIO * bi)1096 static int dgram_sctp_new(BIO *bi)
1097 {
1098 bio_dgram_sctp_data *data = NULL;
1099
1100 bi->init = 0;
1101 bi->num = 0;
1102 data = OPENSSL_malloc(sizeof(bio_dgram_sctp_data));
1103 if (data == NULL)
1104 return 0;
1105 memset(data, 0x00, sizeof(bio_dgram_sctp_data));
1106 # ifdef SCTP_PR_SCTP_NONE
1107 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
1108 # endif
1109 bi->ptr = data;
1110
1111 bi->flags = 0;
1112 return (1);
1113 }
1114
dgram_sctp_free(BIO * a)1115 static int dgram_sctp_free(BIO *a)
1116 {
1117 bio_dgram_sctp_data *data;
1118
1119 if (a == NULL)
1120 return (0);
1121 if (!dgram_clear(a))
1122 return 0;
1123
1124 data = (bio_dgram_sctp_data *) a->ptr;
1125 if (data != NULL) {
1126 if (data->saved_message.data != NULL)
1127 OPENSSL_free(data->saved_message.data);
1128 OPENSSL_free(data);
1129 }
1130
1131 return (1);
1132 }
1133
1134 # ifdef SCTP_AUTHENTICATION_EVENT
dgram_sctp_handle_auth_free_key_event(BIO * b,union sctp_notification * snp)1135 void dgram_sctp_handle_auth_free_key_event(BIO *b,
1136 union sctp_notification *snp)
1137 {
1138 int ret;
1139 struct sctp_authkey_event *authkeyevent = &snp->sn_auth_event;
1140
1141 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY) {
1142 struct sctp_authkeyid authkeyid;
1143
1144 /* delete key */
1145 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
1146 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1147 &authkeyid, sizeof(struct sctp_authkeyid));
1148 }
1149 }
1150 # endif
1151
dgram_sctp_read(BIO * b,char * out,int outl)1152 static int dgram_sctp_read(BIO *b, char *out, int outl)
1153 {
1154 int ret = 0, n = 0, i, optval;
1155 socklen_t optlen;
1156 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1157 union sctp_notification *snp;
1158 struct msghdr msg;
1159 struct iovec iov;
1160 struct cmsghdr *cmsg;
1161 char cmsgbuf[512];
1162
1163 if (out != NULL) {
1164 clear_socket_error();
1165
1166 do {
1167 memset(&data->rcvinfo, 0x00,
1168 sizeof(struct bio_dgram_sctp_rcvinfo));
1169 iov.iov_base = out;
1170 iov.iov_len = outl;
1171 msg.msg_name = NULL;
1172 msg.msg_namelen = 0;
1173 msg.msg_iov = &iov;
1174 msg.msg_iovlen = 1;
1175 msg.msg_control = cmsgbuf;
1176 msg.msg_controllen = 512;
1177 msg.msg_flags = 0;
1178 n = recvmsg(b->num, &msg, 0);
1179
1180 if (n <= 0) {
1181 if (n < 0)
1182 ret = n;
1183 break;
1184 }
1185
1186 if (msg.msg_controllen > 0) {
1187 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg;
1188 cmsg = CMSG_NXTHDR(&msg, cmsg)) {
1189 if (cmsg->cmsg_level != IPPROTO_SCTP)
1190 continue;
1191 # ifdef SCTP_RCVINFO
1192 if (cmsg->cmsg_type == SCTP_RCVINFO) {
1193 struct sctp_rcvinfo *rcvinfo;
1194
1195 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
1196 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
1197 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
1198 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
1199 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
1200 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1201 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1202 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1203 }
1204 # endif
1205 # ifdef SCTP_SNDRCV
1206 if (cmsg->cmsg_type == SCTP_SNDRCV) {
1207 struct sctp_sndrcvinfo *sndrcvinfo;
1208
1209 sndrcvinfo =
1210 (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1211 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1212 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1213 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1214 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1215 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1216 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1217 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1218 }
1219 # endif
1220 }
1221 }
1222
1223 if (msg.msg_flags & MSG_NOTIFICATION) {
1224 snp = (union sctp_notification *)out;
1225 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1226 # ifdef SCTP_EVENT
1227 struct sctp_event event;
1228 # else
1229 struct sctp_event_subscribe event;
1230 socklen_t eventsize;
1231 # endif
1232 /*
1233 * If a message has been delayed until the socket is dry,
1234 * it can be sent now.
1235 */
1236 if (data->saved_message.length > 0) {
1237 dgram_sctp_write(data->saved_message.bio,
1238 data->saved_message.data,
1239 data->saved_message.length);
1240 OPENSSL_free(data->saved_message.data);
1241 data->saved_message.data = NULL;
1242 data->saved_message.length = 0;
1243 }
1244
1245 /* disable sender dry event */
1246 # ifdef SCTP_EVENT
1247 memset(&event, 0, sizeof(struct sctp_event));
1248 event.se_assoc_id = 0;
1249 event.se_type = SCTP_SENDER_DRY_EVENT;
1250 event.se_on = 0;
1251 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1252 sizeof(struct sctp_event));
1253 if (i < 0) {
1254 ret = i;
1255 break;
1256 }
1257 # else
1258 eventsize = sizeof(struct sctp_event_subscribe);
1259 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1260 &eventsize);
1261 if (i < 0) {
1262 ret = i;
1263 break;
1264 }
1265
1266 event.sctp_sender_dry_event = 0;
1267
1268 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1269 sizeof(struct sctp_event_subscribe));
1270 if (i < 0) {
1271 ret = i;
1272 break;
1273 }
1274 # endif
1275 }
1276 # ifdef SCTP_AUTHENTICATION_EVENT
1277 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1278 dgram_sctp_handle_auth_free_key_event(b, snp);
1279 # endif
1280
1281 if (data->handle_notifications != NULL)
1282 data->handle_notifications(b, data->notification_context,
1283 (void *)out);
1284
1285 memset(out, 0, outl);
1286 } else
1287 ret += n;
1288 }
1289 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR)
1290 && (ret < outl));
1291
1292 if (ret > 0 && !(msg.msg_flags & MSG_EOR)) {
1293 /* Partial message read, this should never happen! */
1294
1295 /*
1296 * The buffer was too small, this means the peer sent a message
1297 * that was larger than allowed.
1298 */
1299 if (ret == outl)
1300 return -1;
1301
1302 /*
1303 * Test if socket buffer can handle max record size (2^14 + 2048
1304 * + 13)
1305 */
1306 optlen = (socklen_t) sizeof(int);
1307 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
1308 if (ret >= 0)
1309 OPENSSL_assert(optval >= 18445);
1310
1311 /*
1312 * Test if SCTP doesn't partially deliver below max record size
1313 * (2^14 + 2048 + 13)
1314 */
1315 optlen = (socklen_t) sizeof(int);
1316 ret =
1317 getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
1318 &optval, &optlen);
1319 if (ret >= 0)
1320 OPENSSL_assert(optval >= 18445);
1321
1322 /*
1323 * Partially delivered notification??? Probably a bug....
1324 */
1325 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
1326
1327 /*
1328 * Everything seems ok till now, so it's most likely a message
1329 * dropped by PR-SCTP.
1330 */
1331 memset(out, 0, outl);
1332 BIO_set_retry_read(b);
1333 return -1;
1334 }
1335
1336 BIO_clear_retry_flags(b);
1337 if (ret < 0) {
1338 if (BIO_dgram_should_retry(ret)) {
1339 BIO_set_retry_read(b);
1340 data->_errno = get_last_socket_error();
1341 }
1342 }
1343
1344 /* Test if peer uses SCTP-AUTH before continuing */
1345 if (!data->peer_auth_tested) {
1346 int ii, auth_data = 0, auth_forward = 0;
1347 unsigned char *p;
1348 struct sctp_authchunks *authchunks;
1349
1350 optlen =
1351 (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1352 authchunks = OPENSSL_malloc(optlen);
1353 if (!authchunks) {
1354 BIOerr(BIO_F_DGRAM_SCTP_READ, ERR_R_MALLOC_FAILURE);
1355 return -1;
1356 }
1357 memset(authchunks, 0, sizeof(optlen));
1358 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS,
1359 authchunks, &optlen);
1360
1361 if (ii >= 0)
1362 for (p = (unsigned char *)authchunks->gauth_chunks;
1363 p < (unsigned char *)authchunks + optlen;
1364 p += sizeof(uint8_t)) {
1365 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1366 auth_data = 1;
1367 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1368 auth_forward = 1;
1369 }
1370
1371 OPENSSL_free(authchunks);
1372
1373 if (!auth_data || !auth_forward) {
1374 BIOerr(BIO_F_DGRAM_SCTP_READ, BIO_R_CONNECT_ERROR);
1375 return -1;
1376 }
1377
1378 data->peer_auth_tested = 1;
1379 }
1380 }
1381 return (ret);
1382 }
1383
dgram_sctp_write(BIO * b,const char * in,int inl)1384 static int dgram_sctp_write(BIO *b, const char *in, int inl)
1385 {
1386 int ret;
1387 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1388 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
1389 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
1390 struct bio_dgram_sctp_sndinfo handshake_sinfo;
1391 struct iovec iov[1];
1392 struct msghdr msg;
1393 struct cmsghdr *cmsg;
1394 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1395 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) +
1396 CMSG_SPACE(sizeof(struct sctp_prinfo))];
1397 struct sctp_sndinfo *sndinfo;
1398 struct sctp_prinfo *prinfo;
1399 # else
1400 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
1401 struct sctp_sndrcvinfo *sndrcvinfo;
1402 # endif
1403
1404 clear_socket_error();
1405
1406 /*
1407 * If we're send anything else than application data, disable all user
1408 * parameters and flags.
1409 */
1410 if (in[0] != 23) {
1411 memset(&handshake_sinfo, 0x00, sizeof(struct bio_dgram_sctp_sndinfo));
1412 # ifdef SCTP_SACK_IMMEDIATELY
1413 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
1414 # endif
1415 sinfo = &handshake_sinfo;
1416 }
1417
1418 /*
1419 * If we have to send a shutdown alert message and the socket is not dry
1420 * yet, we have to save it and send it as soon as the socket gets dry.
1421 */
1422 if (data->save_shutdown && !BIO_dgram_sctp_wait_for_dry(b)) {
1423 char *tmp;
1424 data->saved_message.bio = b;
1425 if (!(tmp = OPENSSL_malloc(inl))) {
1426 BIOerr(BIO_F_DGRAM_SCTP_WRITE, ERR_R_MALLOC_FAILURE);
1427 return -1;
1428 }
1429 if (data->saved_message.data)
1430 OPENSSL_free(data->saved_message.data);
1431 data->saved_message.data = tmp;
1432 memcpy(data->saved_message.data, in, inl);
1433 data->saved_message.length = inl;
1434 return inl;
1435 }
1436
1437 iov[0].iov_base = (char *)in;
1438 iov[0].iov_len = inl;
1439 msg.msg_name = NULL;
1440 msg.msg_namelen = 0;
1441 msg.msg_iov = iov;
1442 msg.msg_iovlen = 1;
1443 msg.msg_control = (caddr_t) cmsgbuf;
1444 msg.msg_controllen = 0;
1445 msg.msg_flags = 0;
1446 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1447 cmsg = (struct cmsghdr *)cmsgbuf;
1448 cmsg->cmsg_level = IPPROTO_SCTP;
1449 cmsg->cmsg_type = SCTP_SNDINFO;
1450 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
1451 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
1452 memset(sndinfo, 0, sizeof(struct sctp_sndinfo));
1453 sndinfo->snd_sid = sinfo->snd_sid;
1454 sndinfo->snd_flags = sinfo->snd_flags;
1455 sndinfo->snd_ppid = sinfo->snd_ppid;
1456 sndinfo->snd_context = sinfo->snd_context;
1457 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
1458
1459 cmsg =
1460 (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
1461 cmsg->cmsg_level = IPPROTO_SCTP;
1462 cmsg->cmsg_type = SCTP_PRINFO;
1463 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
1464 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
1465 memset(prinfo, 0, sizeof(struct sctp_prinfo));
1466 prinfo->pr_policy = pinfo->pr_policy;
1467 prinfo->pr_value = pinfo->pr_value;
1468 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
1469 # else
1470 cmsg = (struct cmsghdr *)cmsgbuf;
1471 cmsg->cmsg_level = IPPROTO_SCTP;
1472 cmsg->cmsg_type = SCTP_SNDRCV;
1473 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
1474 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1475 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
1476 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
1477 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
1478 # ifdef __FreeBSD__
1479 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
1480 # endif
1481 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
1482 sndrcvinfo->sinfo_context = sinfo->snd_context;
1483 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
1484 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
1485 # endif
1486
1487 ret = sendmsg(b->num, &msg, 0);
1488
1489 BIO_clear_retry_flags(b);
1490 if (ret <= 0) {
1491 if (BIO_dgram_should_retry(ret)) {
1492 BIO_set_retry_write(b);
1493 data->_errno = get_last_socket_error();
1494 }
1495 }
1496 return (ret);
1497 }
1498
dgram_sctp_ctrl(BIO * b,int cmd,long num,void * ptr)1499 static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
1500 {
1501 long ret = 1;
1502 bio_dgram_sctp_data *data = NULL;
1503 socklen_t sockopt_len = 0;
1504 struct sctp_authkeyid authkeyid;
1505 struct sctp_authkey *authkey = NULL;
1506
1507 data = (bio_dgram_sctp_data *) b->ptr;
1508
1509 switch (cmd) {
1510 case BIO_CTRL_DGRAM_QUERY_MTU:
1511 /*
1512 * Set to maximum (2^14) and ignore user input to enable transport
1513 * protocol fragmentation. Returns always 2^14.
1514 */
1515 data->mtu = 16384;
1516 ret = data->mtu;
1517 break;
1518 case BIO_CTRL_DGRAM_SET_MTU:
1519 /*
1520 * Set to maximum (2^14) and ignore input to enable transport
1521 * protocol fragmentation. Returns always 2^14.
1522 */
1523 data->mtu = 16384;
1524 ret = data->mtu;
1525 break;
1526 case BIO_CTRL_DGRAM_SET_CONNECTED:
1527 case BIO_CTRL_DGRAM_CONNECT:
1528 /* Returns always -1. */
1529 ret = -1;
1530 break;
1531 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
1532 /*
1533 * SCTP doesn't need the DTLS timer Returns always 1.
1534 */
1535 break;
1536 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
1537 /*
1538 * We allow transport protocol fragmentation so this is irrelevant
1539 */
1540 ret = 0;
1541 break;
1542 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
1543 if (num > 0)
1544 data->in_handshake = 1;
1545 else
1546 data->in_handshake = 0;
1547
1548 ret =
1549 setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY,
1550 &data->in_handshake, sizeof(int));
1551 break;
1552 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
1553 /*
1554 * New shared key for SCTP AUTH. Returns 0 on success, -1 otherwise.
1555 */
1556
1557 /* Get active key */
1558 sockopt_len = sizeof(struct sctp_authkeyid);
1559 ret =
1560 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1561 &sockopt_len);
1562 if (ret < 0)
1563 break;
1564
1565 /* Add new key */
1566 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
1567 authkey = OPENSSL_malloc(sockopt_len);
1568 if (authkey == NULL) {
1569 ret = -1;
1570 break;
1571 }
1572 memset(authkey, 0x00, sockopt_len);
1573 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
1574 # ifndef __FreeBSD__
1575 /*
1576 * This field is missing in FreeBSD 8.2 and earlier, and FreeBSD 8.3
1577 * and higher work without it.
1578 */
1579 authkey->sca_keylength = 64;
1580 # endif
1581 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
1582
1583 ret =
1584 setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey,
1585 sockopt_len);
1586 OPENSSL_free(authkey);
1587 authkey = NULL;
1588 if (ret < 0)
1589 break;
1590
1591 /* Reset active key */
1592 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1593 &authkeyid, sizeof(struct sctp_authkeyid));
1594 if (ret < 0)
1595 break;
1596
1597 break;
1598 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
1599 /* Returns 0 on success, -1 otherwise. */
1600
1601 /* Get active key */
1602 sockopt_len = sizeof(struct sctp_authkeyid);
1603 ret =
1604 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1605 &sockopt_len);
1606 if (ret < 0)
1607 break;
1608
1609 /* Set active key */
1610 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
1611 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1612 &authkeyid, sizeof(struct sctp_authkeyid));
1613 if (ret < 0)
1614 break;
1615
1616 /*
1617 * CCS has been sent, so remember that and fall through to check if
1618 * we need to deactivate an old key
1619 */
1620 data->ccs_sent = 1;
1621
1622 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
1623 /* Returns 0 on success, -1 otherwise. */
1624
1625 /*
1626 * Has this command really been called or is this just a
1627 * fall-through?
1628 */
1629 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
1630 data->ccs_rcvd = 1;
1631
1632 /*
1633 * CSS has been both, received and sent, so deactivate an old key
1634 */
1635 if (data->ccs_rcvd == 1 && data->ccs_sent == 1) {
1636 /* Get active key */
1637 sockopt_len = sizeof(struct sctp_authkeyid);
1638 ret =
1639 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1640 &authkeyid, &sockopt_len);
1641 if (ret < 0)
1642 break;
1643
1644 /*
1645 * Deactivate key or delete second last key if
1646 * SCTP_AUTHENTICATION_EVENT is not available.
1647 */
1648 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1649 # ifdef SCTP_AUTH_DEACTIVATE_KEY
1650 sockopt_len = sizeof(struct sctp_authkeyid);
1651 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
1652 &authkeyid, sockopt_len);
1653 if (ret < 0)
1654 break;
1655 # endif
1656 # ifndef SCTP_AUTHENTICATION_EVENT
1657 if (authkeyid.scact_keynumber > 0) {
1658 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1659 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1660 &authkeyid, sizeof(struct sctp_authkeyid));
1661 if (ret < 0)
1662 break;
1663 }
1664 # endif
1665
1666 data->ccs_rcvd = 0;
1667 data->ccs_sent = 0;
1668 }
1669 break;
1670 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
1671 /* Returns the size of the copied struct. */
1672 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1673 num = sizeof(struct bio_dgram_sctp_sndinfo);
1674
1675 memcpy(ptr, &(data->sndinfo), num);
1676 ret = num;
1677 break;
1678 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
1679 /* Returns the size of the copied struct. */
1680 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1681 num = sizeof(struct bio_dgram_sctp_sndinfo);
1682
1683 memcpy(&(data->sndinfo), ptr, num);
1684 break;
1685 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
1686 /* Returns the size of the copied struct. */
1687 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1688 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1689
1690 memcpy(ptr, &data->rcvinfo, num);
1691
1692 ret = num;
1693 break;
1694 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
1695 /* Returns the size of the copied struct. */
1696 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1697 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1698
1699 memcpy(&(data->rcvinfo), ptr, num);
1700 break;
1701 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
1702 /* Returns the size of the copied struct. */
1703 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1704 num = sizeof(struct bio_dgram_sctp_prinfo);
1705
1706 memcpy(ptr, &(data->prinfo), num);
1707 ret = num;
1708 break;
1709 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
1710 /* Returns the size of the copied struct. */
1711 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1712 num = sizeof(struct bio_dgram_sctp_prinfo);
1713
1714 memcpy(&(data->prinfo), ptr, num);
1715 break;
1716 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
1717 /* Returns always 1. */
1718 if (num > 0)
1719 data->save_shutdown = 1;
1720 else
1721 data->save_shutdown = 0;
1722 break;
1723
1724 default:
1725 /*
1726 * Pass to default ctrl function to process SCTP unspecific commands
1727 */
1728 ret = dgram_ctrl(b, cmd, num, ptr);
1729 break;
1730 }
1731 return (ret);
1732 }
1733
BIO_dgram_sctp_notification_cb(BIO * b,void (* handle_notifications)(BIO * bio,void * context,void * buf),void * context)1734 int BIO_dgram_sctp_notification_cb(BIO *b,
1735 void (*handle_notifications) (BIO *bio,
1736 void
1737 *context,
1738 void *buf),
1739 void *context)
1740 {
1741 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1742
1743 if (handle_notifications != NULL) {
1744 data->handle_notifications = handle_notifications;
1745 data->notification_context = context;
1746 } else
1747 return -1;
1748
1749 return 0;
1750 }
1751
BIO_dgram_sctp_wait_for_dry(BIO * b)1752 int BIO_dgram_sctp_wait_for_dry(BIO *b)
1753 {
1754 int is_dry = 0;
1755 int n, sockflags, ret;
1756 union sctp_notification snp;
1757 struct msghdr msg;
1758 struct iovec iov;
1759 # ifdef SCTP_EVENT
1760 struct sctp_event event;
1761 # else
1762 struct sctp_event_subscribe event;
1763 socklen_t eventsize;
1764 # endif
1765 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1766
1767 /* set sender dry event */
1768 # ifdef SCTP_EVENT
1769 memset(&event, 0, sizeof(struct sctp_event));
1770 event.se_assoc_id = 0;
1771 event.se_type = SCTP_SENDER_DRY_EVENT;
1772 event.se_on = 1;
1773 ret =
1774 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1775 sizeof(struct sctp_event));
1776 # else
1777 eventsize = sizeof(struct sctp_event_subscribe);
1778 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1779 if (ret < 0)
1780 return -1;
1781
1782 event.sctp_sender_dry_event = 1;
1783
1784 ret =
1785 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1786 sizeof(struct sctp_event_subscribe));
1787 # endif
1788 if (ret < 0)
1789 return -1;
1790
1791 /* peek for notification */
1792 memset(&snp, 0x00, sizeof(union sctp_notification));
1793 iov.iov_base = (char *)&snp;
1794 iov.iov_len = sizeof(union sctp_notification);
1795 msg.msg_name = NULL;
1796 msg.msg_namelen = 0;
1797 msg.msg_iov = &iov;
1798 msg.msg_iovlen = 1;
1799 msg.msg_control = NULL;
1800 msg.msg_controllen = 0;
1801 msg.msg_flags = 0;
1802
1803 n = recvmsg(b->num, &msg, MSG_PEEK);
1804 if (n <= 0) {
1805 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1806 && (get_last_socket_error() != EWOULDBLOCK))
1807 return -1;
1808 else
1809 return 0;
1810 }
1811
1812 /* if we find a notification, process it and try again if necessary */
1813 while (msg.msg_flags & MSG_NOTIFICATION) {
1814 memset(&snp, 0x00, sizeof(union sctp_notification));
1815 iov.iov_base = (char *)&snp;
1816 iov.iov_len = sizeof(union sctp_notification);
1817 msg.msg_name = NULL;
1818 msg.msg_namelen = 0;
1819 msg.msg_iov = &iov;
1820 msg.msg_iovlen = 1;
1821 msg.msg_control = NULL;
1822 msg.msg_controllen = 0;
1823 msg.msg_flags = 0;
1824
1825 n = recvmsg(b->num, &msg, 0);
1826 if (n <= 0) {
1827 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1828 && (get_last_socket_error() != EWOULDBLOCK))
1829 return -1;
1830 else
1831 return is_dry;
1832 }
1833
1834 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1835 is_dry = 1;
1836
1837 /* disable sender dry event */
1838 # ifdef SCTP_EVENT
1839 memset(&event, 0, sizeof(struct sctp_event));
1840 event.se_assoc_id = 0;
1841 event.se_type = SCTP_SENDER_DRY_EVENT;
1842 event.se_on = 0;
1843 ret =
1844 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1845 sizeof(struct sctp_event));
1846 # else
1847 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
1848 ret =
1849 getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1850 &eventsize);
1851 if (ret < 0)
1852 return -1;
1853
1854 event.sctp_sender_dry_event = 0;
1855
1856 ret =
1857 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1858 sizeof(struct sctp_event_subscribe));
1859 # endif
1860 if (ret < 0)
1861 return -1;
1862 }
1863 # ifdef SCTP_AUTHENTICATION_EVENT
1864 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1865 dgram_sctp_handle_auth_free_key_event(b, &snp);
1866 # endif
1867
1868 if (data->handle_notifications != NULL)
1869 data->handle_notifications(b, data->notification_context,
1870 (void *)&snp);
1871
1872 /* found notification, peek again */
1873 memset(&snp, 0x00, sizeof(union sctp_notification));
1874 iov.iov_base = (char *)&snp;
1875 iov.iov_len = sizeof(union sctp_notification);
1876 msg.msg_name = NULL;
1877 msg.msg_namelen = 0;
1878 msg.msg_iov = &iov;
1879 msg.msg_iovlen = 1;
1880 msg.msg_control = NULL;
1881 msg.msg_controllen = 0;
1882 msg.msg_flags = 0;
1883
1884 /* if we have seen the dry already, don't wait */
1885 if (is_dry) {
1886 sockflags = fcntl(b->num, F_GETFL, 0);
1887 fcntl(b->num, F_SETFL, O_NONBLOCK);
1888 }
1889
1890 n = recvmsg(b->num, &msg, MSG_PEEK);
1891
1892 if (is_dry) {
1893 fcntl(b->num, F_SETFL, sockflags);
1894 }
1895
1896 if (n <= 0) {
1897 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1898 && (get_last_socket_error() != EWOULDBLOCK))
1899 return -1;
1900 else
1901 return is_dry;
1902 }
1903 }
1904
1905 /* read anything else */
1906 return is_dry;
1907 }
1908
BIO_dgram_sctp_msg_waiting(BIO * b)1909 int BIO_dgram_sctp_msg_waiting(BIO *b)
1910 {
1911 int n, sockflags;
1912 union sctp_notification snp;
1913 struct msghdr msg;
1914 struct iovec iov;
1915 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1916
1917 /* Check if there are any messages waiting to be read */
1918 do {
1919 memset(&snp, 0x00, sizeof(union sctp_notification));
1920 iov.iov_base = (char *)&snp;
1921 iov.iov_len = sizeof(union sctp_notification);
1922 msg.msg_name = NULL;
1923 msg.msg_namelen = 0;
1924 msg.msg_iov = &iov;
1925 msg.msg_iovlen = 1;
1926 msg.msg_control = NULL;
1927 msg.msg_controllen = 0;
1928 msg.msg_flags = 0;
1929
1930 sockflags = fcntl(b->num, F_GETFL, 0);
1931 fcntl(b->num, F_SETFL, O_NONBLOCK);
1932 n = recvmsg(b->num, &msg, MSG_PEEK);
1933 fcntl(b->num, F_SETFL, sockflags);
1934
1935 /* if notification, process and try again */
1936 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION)) {
1937 # ifdef SCTP_AUTHENTICATION_EVENT
1938 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1939 dgram_sctp_handle_auth_free_key_event(b, &snp);
1940 # endif
1941
1942 memset(&snp, 0x00, sizeof(union sctp_notification));
1943 iov.iov_base = (char *)&snp;
1944 iov.iov_len = sizeof(union sctp_notification);
1945 msg.msg_name = NULL;
1946 msg.msg_namelen = 0;
1947 msg.msg_iov = &iov;
1948 msg.msg_iovlen = 1;
1949 msg.msg_control = NULL;
1950 msg.msg_controllen = 0;
1951 msg.msg_flags = 0;
1952 n = recvmsg(b->num, &msg, 0);
1953
1954 if (data->handle_notifications != NULL)
1955 data->handle_notifications(b, data->notification_context,
1956 (void *)&snp);
1957 }
1958
1959 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
1960
1961 /* Return 1 if there is a message to be read, return 0 otherwise. */
1962 if (n > 0)
1963 return 1;
1964 else
1965 return 0;
1966 }
1967
dgram_sctp_puts(BIO * bp,const char * str)1968 static int dgram_sctp_puts(BIO *bp, const char *str)
1969 {
1970 int n, ret;
1971
1972 n = strlen(str);
1973 ret = dgram_sctp_write(bp, str, n);
1974 return (ret);
1975 }
1976 # endif
1977
BIO_dgram_should_retry(int i)1978 static int BIO_dgram_should_retry(int i)
1979 {
1980 int err;
1981
1982 if ((i == 0) || (i == -1)) {
1983 err = get_last_socket_error();
1984
1985 # if defined(OPENSSL_SYS_WINDOWS)
1986 /*
1987 * If the socket return value (i) is -1 and err is unexpectedly 0 at
1988 * this point, the error code was overwritten by another system call
1989 * before this error handling is called.
1990 */
1991 # endif
1992
1993 return (BIO_dgram_non_fatal_error(err));
1994 }
1995 return (0);
1996 }
1997
BIO_dgram_non_fatal_error(int err)1998 int BIO_dgram_non_fatal_error(int err)
1999 {
2000 switch (err) {
2001 # if defined(OPENSSL_SYS_WINDOWS)
2002 # if defined(WSAEWOULDBLOCK)
2003 case WSAEWOULDBLOCK:
2004 # endif
2005
2006 # if 0 /* This appears to always be an error */
2007 # if defined(WSAENOTCONN)
2008 case WSAENOTCONN:
2009 # endif
2010 # endif
2011 # endif
2012
2013 # ifdef EWOULDBLOCK
2014 # ifdef WSAEWOULDBLOCK
2015 # if WSAEWOULDBLOCK != EWOULDBLOCK
2016 case EWOULDBLOCK:
2017 # endif
2018 # else
2019 case EWOULDBLOCK:
2020 # endif
2021 # endif
2022
2023 # ifdef EINTR
2024 case EINTR:
2025 # endif
2026
2027 # ifdef EAGAIN
2028 # if EWOULDBLOCK != EAGAIN
2029 case EAGAIN:
2030 # endif
2031 # endif
2032
2033 # ifdef EPROTO
2034 case EPROTO:
2035 # endif
2036
2037 # ifdef EINPROGRESS
2038 case EINPROGRESS:
2039 # endif
2040
2041 # ifdef EALREADY
2042 case EALREADY:
2043 # endif
2044
2045 return (1);
2046 /* break; */
2047 default:
2048 break;
2049 }
2050 return (0);
2051 }
2052
get_current_time(struct timeval * t)2053 static void get_current_time(struct timeval *t)
2054 {
2055 # if defined(_WIN32)
2056 SYSTEMTIME st;
2057 union {
2058 unsigned __int64 ul;
2059 FILETIME ft;
2060 } now;
2061
2062 GetSystemTime(&st);
2063 SystemTimeToFileTime(&st, &now.ft);
2064 # ifdef __MINGW32__
2065 now.ul -= 116444736000000000ULL;
2066 # else
2067 now.ul -= 116444736000000000UI64; /* re-bias to 1/1/1970 */
2068 # endif
2069 t->tv_sec = (long)(now.ul / 10000000);
2070 t->tv_usec = ((int)(now.ul % 10000000)) / 10;
2071 # elif defined(OPENSSL_SYS_VMS)
2072 struct timeb tb;
2073 ftime(&tb);
2074 t->tv_sec = (long)tb.time;
2075 t->tv_usec = (long)tb.millitm * 1000;
2076 # else
2077 gettimeofday(t, NULL);
2078 # endif
2079 }
2080
2081 #endif
2082