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 #ifndef OPENSSL_NO_DGRAM
61
62 #include <stdio.h>
63 #include <errno.h>
64 #define USE_SOCKETS
65 #include "cryptlib.h"
66
67 #include <openssl/bio.h>
68
69 #if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS)
70 #include <sys/timeb.h>
71 #endif
72
73 #ifdef OPENSSL_SYS_LINUX
74 #define IP_MTU 14 /* linux is lame */
75 #endif
76
77 #ifdef WATT32
78 #define sock_write SockWrite /* Watt-32 uses same names */
79 #define sock_read SockRead
80 #define sock_puts SockPuts
81 #endif
82
83 static int dgram_write(BIO *h, const char *buf, int num);
84 static int dgram_read(BIO *h, char *buf, int size);
85 static int dgram_puts(BIO *h, const char *str);
86 static long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2);
87 static int dgram_new(BIO *h);
88 static int dgram_free(BIO *data);
89 static int dgram_clear(BIO *bio);
90
91 static int BIO_dgram_should_retry(int s);
92
93 static void get_current_time(struct timeval *t);
94
95 static BIO_METHOD methods_dgramp=
96 {
97 BIO_TYPE_DGRAM,
98 "datagram socket",
99 dgram_write,
100 dgram_read,
101 dgram_puts,
102 NULL, /* dgram_gets, */
103 dgram_ctrl,
104 dgram_new,
105 dgram_free,
106 NULL,
107 };
108
109 typedef struct bio_dgram_data_st
110 {
111 union {
112 struct sockaddr sa;
113 struct sockaddr_in sa_in;
114 #if OPENSSL_USE_IPV6
115 struct sockaddr_in6 sa_in6;
116 #endif
117 } peer;
118 unsigned int connected;
119 unsigned int _errno;
120 unsigned int mtu;
121 struct timeval next_timeout;
122 struct timeval socket_timeout;
123 } bio_dgram_data;
124
BIO_s_datagram(void)125 BIO_METHOD *BIO_s_datagram(void)
126 {
127 return(&methods_dgramp);
128 }
129
BIO_new_dgram(int fd,int close_flag)130 BIO *BIO_new_dgram(int fd, int close_flag)
131 {
132 BIO *ret;
133
134 ret=BIO_new(BIO_s_datagram());
135 if (ret == NULL) return(NULL);
136 BIO_set_fd(ret,fd,close_flag);
137 return(ret);
138 }
139
dgram_new(BIO * bi)140 static int dgram_new(BIO *bi)
141 {
142 bio_dgram_data *data = NULL;
143
144 bi->init=0;
145 bi->num=0;
146 data = OPENSSL_malloc(sizeof(bio_dgram_data));
147 if (data == NULL)
148 return 0;
149 memset(data, 0x00, sizeof(bio_dgram_data));
150 bi->ptr = data;
151
152 bi->flags=0;
153 return(1);
154 }
155
dgram_free(BIO * a)156 static int dgram_free(BIO *a)
157 {
158 bio_dgram_data *data;
159
160 if (a == NULL) return(0);
161 if ( ! dgram_clear(a))
162 return 0;
163
164 data = (bio_dgram_data *)a->ptr;
165 if(data != NULL) OPENSSL_free(data);
166
167 return(1);
168 }
169
dgram_clear(BIO * a)170 static int dgram_clear(BIO *a)
171 {
172 if (a == NULL) return(0);
173 if (a->shutdown)
174 {
175 if (a->init)
176 {
177 SHUTDOWN2(a->num);
178 }
179 a->init=0;
180 a->flags=0;
181 }
182 return(1);
183 }
184
dgram_adjust_rcv_timeout(BIO * b)185 static void dgram_adjust_rcv_timeout(BIO *b)
186 {
187 #if defined(SO_RCVTIMEO)
188 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
189 int sz = sizeof(int);
190
191 /* Is a timer active? */
192 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0)
193 {
194 struct timeval timenow, timeleft;
195
196 /* Read current socket timeout */
197 #ifdef OPENSSL_SYS_WINDOWS
198 int timeout;
199 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
200 (void*)&timeout, &sz) < 0)
201 { perror("getsockopt"); }
202 else
203 {
204 data->socket_timeout.tv_sec = timeout / 1000;
205 data->socket_timeout.tv_usec = (timeout % 1000) * 1000;
206 }
207 #else
208 if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
209 &(data->socket_timeout), (void *)&sz) < 0)
210 { perror("getsockopt"); }
211 #endif
212
213 /* Get current time */
214 get_current_time(&timenow);
215
216 /* Calculate time left until timer expires */
217 memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval));
218 timeleft.tv_sec -= timenow.tv_sec;
219 timeleft.tv_usec -= timenow.tv_usec;
220 if (timeleft.tv_usec < 0)
221 {
222 timeleft.tv_sec--;
223 timeleft.tv_usec += 1000000;
224 }
225
226 if (timeleft.tv_sec < 0)
227 {
228 timeleft.tv_sec = 0;
229 timeleft.tv_usec = 1;
230 }
231
232 /* Adjust socket timeout if next handhake message timer
233 * will expire earlier.
234 */
235 if ((data->socket_timeout.tv_sec == 0 && data->socket_timeout.tv_usec == 0) ||
236 (data->socket_timeout.tv_sec > timeleft.tv_sec) ||
237 (data->socket_timeout.tv_sec == timeleft.tv_sec &&
238 data->socket_timeout.tv_usec >= timeleft.tv_usec))
239 {
240 #ifdef OPENSSL_SYS_WINDOWS
241 timeout = timeleft.tv_sec * 1000 + timeleft.tv_usec / 1000;
242 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
243 (void*)&timeout, sizeof(timeout)) < 0)
244 { perror("setsockopt"); }
245 #else
246 if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &timeleft,
247 sizeof(struct timeval)) < 0)
248 { perror("setsockopt"); }
249 #endif
250 }
251 }
252 #endif
253 }
254
dgram_reset_rcv_timeout(BIO * b)255 static void dgram_reset_rcv_timeout(BIO *b)
256 {
257 #if defined(SO_RCVTIMEO)
258 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
259
260 /* Is a timer active? */
261 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0)
262 {
263 #ifdef OPENSSL_SYS_WINDOWS
264 int timeout = data->socket_timeout.tv_sec * 1000 +
265 data->socket_timeout.tv_usec / 1000;
266 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
267 (void*)&timeout, sizeof(timeout)) < 0)
268 { perror("setsockopt"); }
269 #else
270 if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &(data->socket_timeout),
271 sizeof(struct timeval)) < 0)
272 { perror("setsockopt"); }
273 #endif
274 }
275 #endif
276 }
277
dgram_read(BIO * b,char * out,int outl)278 static int dgram_read(BIO *b, char *out, int outl)
279 {
280 int ret=0;
281 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
282
283 struct {
284 /*
285 * See commentary in b_sock.c. <appro>
286 */
287 union { size_t s; int i; } len;
288 union {
289 struct sockaddr sa;
290 struct sockaddr_in sa_in;
291 #if OPENSSL_USE_IPV6
292 struct sockaddr_in6 sa_in6;
293 #endif
294 } peer;
295 } sa;
296
297 sa.len.s=0;
298 sa.len.i=sizeof(sa.peer);
299
300 if (out != NULL)
301 {
302 clear_socket_error();
303 memset(&sa.peer, 0x00, sizeof(sa.peer));
304 dgram_adjust_rcv_timeout(b);
305 ret=recvfrom(b->num,out,outl,0,&sa.peer.sa,(void *)&sa.len);
306 if (sizeof(sa.len.i)!=sizeof(sa.len.s) && sa.len.i==0)
307 {
308 OPENSSL_assert(sa.len.s<=sizeof(sa.peer));
309 sa.len.i = (int)sa.len.s;
310 }
311 dgram_reset_rcv_timeout(b);
312
313 if ( ! data->connected && ret >= 0)
314 BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &sa.peer);
315
316 BIO_clear_retry_flags(b);
317 if (ret < 0)
318 {
319 if (BIO_dgram_should_retry(ret))
320 {
321 BIO_set_retry_read(b);
322 data->_errno = get_last_socket_error();
323 }
324 }
325 }
326 return(ret);
327 }
328
dgram_write(BIO * b,const char * in,int inl)329 static int dgram_write(BIO *b, const char *in, int inl)
330 {
331 int ret;
332 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
333 clear_socket_error();
334
335 if ( data->connected )
336 ret=writesocket(b->num,in,inl);
337 else
338 {
339 int peerlen = sizeof(data->peer);
340
341 if (data->peer.sa.sa_family == AF_INET)
342 peerlen = sizeof(data->peer.sa_in);
343 #if OPENSSL_USE_IVP6
344 else if (data->peer.sa.sa_family == AF_INET6)
345 peerlen = sizeof(data->peer.sa_in6);
346 #endif
347 #if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK)
348 ret=sendto(b->num, (char *)in, inl, 0, &data->peer.sa, peerlen);
349 #else
350 ret=sendto(b->num, in, inl, 0, &data->peer.sa, peerlen);
351 #endif
352 }
353
354 BIO_clear_retry_flags(b);
355 if (ret <= 0)
356 {
357 if (BIO_dgram_should_retry(ret))
358 {
359 BIO_set_retry_write(b);
360 data->_errno = get_last_socket_error();
361
362 #if 0 /* higher layers are responsible for querying MTU, if necessary */
363 if ( data->_errno == EMSGSIZE)
364 /* retrieve the new MTU */
365 BIO_ctrl(b, BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL);
366 #endif
367 }
368 }
369 return(ret);
370 }
371
dgram_ctrl(BIO * b,int cmd,long num,void * ptr)372 static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
373 {
374 long ret=1;
375 int *ip;
376 struct sockaddr *to = NULL;
377 bio_dgram_data *data = NULL;
378 #if defined(IP_MTU_DISCOVER) || defined(IP_MTU)
379 long sockopt_val = 0;
380 unsigned int sockopt_len = 0;
381 #endif
382 #ifdef OPENSSL_SYS_LINUX
383 socklen_t addr_len;
384 union {
385 struct sockaddr sa;
386 struct sockaddr_in s4;
387 #if OPENSSL_USE_IPV6
388 struct sockaddr_in6 s6;
389 #endif
390 } addr;
391 #endif
392
393 data = (bio_dgram_data *)b->ptr;
394
395 switch (cmd)
396 {
397 case BIO_CTRL_RESET:
398 num=0;
399 case BIO_C_FILE_SEEK:
400 ret=0;
401 break;
402 case BIO_C_FILE_TELL:
403 case BIO_CTRL_INFO:
404 ret=0;
405 break;
406 case BIO_C_SET_FD:
407 dgram_clear(b);
408 b->num= *((int *)ptr);
409 b->shutdown=(int)num;
410 b->init=1;
411 break;
412 case BIO_C_GET_FD:
413 if (b->init)
414 {
415 ip=(int *)ptr;
416 if (ip != NULL) *ip=b->num;
417 ret=b->num;
418 }
419 else
420 ret= -1;
421 break;
422 case BIO_CTRL_GET_CLOSE:
423 ret=b->shutdown;
424 break;
425 case BIO_CTRL_SET_CLOSE:
426 b->shutdown=(int)num;
427 break;
428 case BIO_CTRL_PENDING:
429 case BIO_CTRL_WPENDING:
430 ret=0;
431 break;
432 case BIO_CTRL_DUP:
433 case BIO_CTRL_FLUSH:
434 ret=1;
435 break;
436 case BIO_CTRL_DGRAM_CONNECT:
437 to = (struct sockaddr *)ptr;
438 #if 0
439 if (connect(b->num, to, sizeof(struct sockaddr)) < 0)
440 { perror("connect"); ret = 0; }
441 else
442 {
443 #endif
444 switch (to->sa_family)
445 {
446 case AF_INET:
447 memcpy(&data->peer,to,sizeof(data->peer.sa_in));
448 break;
449 #if OPENSSL_USE_IPV6
450 case AF_INET6:
451 memcpy(&data->peer,to,sizeof(data->peer.sa_in6));
452 break;
453 #endif
454 default:
455 memcpy(&data->peer,to,sizeof(data->peer.sa));
456 break;
457 }
458 #if 0
459 }
460 #endif
461 break;
462 /* (Linux)kernel sets DF bit on outgoing IP packets */
463 case BIO_CTRL_DGRAM_MTU_DISCOVER:
464 #ifdef OPENSSL_SYS_LINUX
465 addr_len = (socklen_t)sizeof(addr);
466 memset((void *)&addr, 0, sizeof(addr));
467 if (getsockname(b->num, &addr.sa, &addr_len) < 0)
468 {
469 ret = 0;
470 break;
471 }
472 sockopt_len = sizeof(sockopt_val);
473 switch (addr.sa.sa_family)
474 {
475 case AF_INET:
476 sockopt_val = IP_PMTUDISC_DO;
477 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
478 &sockopt_val, sizeof(sockopt_val))) < 0)
479 perror("setsockopt");
480 break;
481 #if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER)
482 case AF_INET6:
483 sockopt_val = IPV6_PMTUDISC_DO;
484 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
485 &sockopt_val, sizeof(sockopt_val))) < 0)
486 perror("setsockopt");
487 break;
488 #endif
489 default:
490 ret = -1;
491 break;
492 }
493 ret = -1;
494 #else
495 break;
496 #endif
497 case BIO_CTRL_DGRAM_QUERY_MTU:
498 #ifdef OPENSSL_SYS_LINUX
499 addr_len = (socklen_t)sizeof(addr);
500 memset((void *)&addr, 0, sizeof(addr));
501 if (getsockname(b->num, &addr.sa, &addr_len) < 0)
502 {
503 ret = 0;
504 break;
505 }
506 sockopt_len = sizeof(sockopt_val);
507 switch (addr.sa.sa_family)
508 {
509 case AF_INET:
510 if ((ret = getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
511 &sockopt_len)) < 0 || sockopt_val < 0)
512 {
513 ret = 0;
514 }
515 else
516 {
517 /* we assume that the transport protocol is UDP and no
518 * IP options are used.
519 */
520 data->mtu = sockopt_val - 8 - 20;
521 ret = data->mtu;
522 }
523 break;
524 #if OPENSSL_USE_IPV6 && defined(IPV6_MTU)
525 case AF_INET6:
526 if ((ret = getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU, (void *)&sockopt_val,
527 &sockopt_len)) < 0 || sockopt_val < 0)
528 {
529 ret = 0;
530 }
531 else
532 {
533 /* we assume that the transport protocol is UDP and no
534 * IPV6 options are used.
535 */
536 data->mtu = sockopt_val - 8 - 40;
537 ret = data->mtu;
538 }
539 break;
540 #endif
541 default:
542 ret = 0;
543 break;
544 }
545 #else
546 ret = 0;
547 #endif
548 break;
549 case BIO_CTRL_DGRAM_GET_MTU:
550 return data->mtu;
551 break;
552 case BIO_CTRL_DGRAM_SET_MTU:
553 data->mtu = num;
554 ret = num;
555 break;
556 case BIO_CTRL_DGRAM_SET_CONNECTED:
557 to = (struct sockaddr *)ptr;
558
559 if ( to != NULL)
560 {
561 data->connected = 1;
562 switch (to->sa_family)
563 {
564 case AF_INET:
565 memcpy(&data->peer,to,sizeof(data->peer.sa_in));
566 break;
567 #if OPENSSL_USE_IPV6
568 case AF_INET6:
569 memcpy(&data->peer,to,sizeof(data->peer.sa_in6));
570 break;
571 #endif
572 default:
573 memcpy(&data->peer,to,sizeof(data->peer.sa));
574 break;
575 }
576 }
577 else
578 {
579 data->connected = 0;
580 memset(&(data->peer), 0x00, sizeof(data->peer));
581 }
582 break;
583 case BIO_CTRL_DGRAM_GET_PEER:
584 switch (data->peer.sa.sa_family)
585 {
586 case AF_INET:
587 ret=sizeof(data->peer.sa_in);
588 break;
589 #if OPENSSL_USE_IPV6
590 case AF_INET6:
591 ret=sizeof(data->peer.sa_in6);
592 break;
593 #endif
594 default:
595 ret=sizeof(data->peer.sa);
596 break;
597 }
598 if (num==0 || num>ret)
599 num=ret;
600 memcpy(ptr,&data->peer,(ret=num));
601 break;
602 case BIO_CTRL_DGRAM_SET_PEER:
603 to = (struct sockaddr *) ptr;
604 switch (to->sa_family)
605 {
606 case AF_INET:
607 memcpy(&data->peer,to,sizeof(data->peer.sa_in));
608 break;
609 #if OPENSSL_USE_IPV6
610 case AF_INET6:
611 memcpy(&data->peer,to,sizeof(data->peer.sa_in6));
612 break;
613 #endif
614 default:
615 memcpy(&data->peer,to,sizeof(data->peer.sa));
616 break;
617 }
618 break;
619 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
620 memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
621 break;
622 #if defined(SO_RCVTIMEO)
623 case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
624 #ifdef OPENSSL_SYS_WINDOWS
625 {
626 struct timeval *tv = (struct timeval *)ptr;
627 int timeout = tv->tv_sec * 1000 + tv->tv_usec/1000;
628 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
629 (void*)&timeout, sizeof(timeout)) < 0)
630 { perror("setsockopt"); ret = -1; }
631 }
632 #else
633 if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
634 sizeof(struct timeval)) < 0)
635 { perror("setsockopt"); ret = -1; }
636 #endif
637 break;
638 case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
639 #ifdef OPENSSL_SYS_WINDOWS
640 {
641 int timeout, sz = sizeof(timeout);
642 struct timeval *tv = (struct timeval *)ptr;
643 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
644 (void*)&timeout, &sz) < 0)
645 { perror("getsockopt"); ret = -1; }
646 else
647 {
648 tv->tv_sec = timeout / 1000;
649 tv->tv_usec = (timeout % 1000) * 1000;
650 ret = sizeof(*tv);
651 }
652 }
653 #else
654 if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
655 ptr, (void *)&ret) < 0)
656 { perror("getsockopt"); ret = -1; }
657 #endif
658 break;
659 #endif
660 #if defined(SO_SNDTIMEO)
661 case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
662 #ifdef OPENSSL_SYS_WINDOWS
663 {
664 struct timeval *tv = (struct timeval *)ptr;
665 int timeout = tv->tv_sec * 1000 + tv->tv_usec/1000;
666 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
667 (void*)&timeout, sizeof(timeout)) < 0)
668 { perror("setsockopt"); ret = -1; }
669 }
670 #else
671 if ( setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
672 sizeof(struct timeval)) < 0)
673 { perror("setsockopt"); ret = -1; }
674 #endif
675 break;
676 case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
677 #ifdef OPENSSL_SYS_WINDOWS
678 {
679 int timeout, sz = sizeof(timeout);
680 struct timeval *tv = (struct timeval *)ptr;
681 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
682 (void*)&timeout, &sz) < 0)
683 { perror("getsockopt"); ret = -1; }
684 else
685 {
686 tv->tv_sec = timeout / 1000;
687 tv->tv_usec = (timeout % 1000) * 1000;
688 ret = sizeof(*tv);
689 }
690 }
691 #else
692 if ( getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
693 ptr, (void *)&ret) < 0)
694 { perror("getsockopt"); ret = -1; }
695 #endif
696 break;
697 #endif
698 case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
699 /* fall-through */
700 case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
701 #ifdef OPENSSL_SYS_WINDOWS
702 if ( data->_errno == WSAETIMEDOUT)
703 #else
704 if ( data->_errno == EAGAIN)
705 #endif
706 {
707 ret = 1;
708 data->_errno = 0;
709 }
710 else
711 ret = 0;
712 break;
713 #ifdef EMSGSIZE
714 case BIO_CTRL_DGRAM_MTU_EXCEEDED:
715 if ( data->_errno == EMSGSIZE)
716 {
717 ret = 1;
718 data->_errno = 0;
719 }
720 else
721 ret = 0;
722 break;
723 #endif
724 default:
725 ret=0;
726 break;
727 }
728 return(ret);
729 }
730
dgram_puts(BIO * bp,const char * str)731 static int dgram_puts(BIO *bp, const char *str)
732 {
733 int n,ret;
734
735 n=strlen(str);
736 ret=dgram_write(bp,str,n);
737 return(ret);
738 }
739
BIO_dgram_should_retry(int i)740 static int BIO_dgram_should_retry(int i)
741 {
742 int err;
743
744 if ((i == 0) || (i == -1))
745 {
746 err=get_last_socket_error();
747
748 #if defined(OPENSSL_SYS_WINDOWS) && 0 /* more microsoft stupidity? perhaps not? Ben 4/1/99 */
749 if ((i == -1) && (err == 0))
750 return(1);
751 #endif
752
753 return(BIO_dgram_non_fatal_error(err));
754 }
755 return(0);
756 }
757
BIO_dgram_non_fatal_error(int err)758 int BIO_dgram_non_fatal_error(int err)
759 {
760 switch (err)
761 {
762 #if defined(OPENSSL_SYS_WINDOWS)
763 # if defined(WSAEWOULDBLOCK)
764 case WSAEWOULDBLOCK:
765 # endif
766
767 # if 0 /* This appears to always be an error */
768 # if defined(WSAENOTCONN)
769 case WSAENOTCONN:
770 # endif
771 # endif
772 #endif
773
774 #ifdef EWOULDBLOCK
775 # ifdef WSAEWOULDBLOCK
776 # if WSAEWOULDBLOCK != EWOULDBLOCK
777 case EWOULDBLOCK:
778 # endif
779 # else
780 case EWOULDBLOCK:
781 # endif
782 #endif
783
784 #ifdef EINTR
785 case EINTR:
786 #endif
787
788 #ifdef EAGAIN
789 #if EWOULDBLOCK != EAGAIN
790 case EAGAIN:
791 # endif
792 #endif
793
794 #ifdef EPROTO
795 case EPROTO:
796 #endif
797
798 #ifdef EINPROGRESS
799 case EINPROGRESS:
800 #endif
801
802 #ifdef EALREADY
803 case EALREADY:
804 #endif
805
806 return(1);
807 /* break; */
808 default:
809 break;
810 }
811 return(0);
812 }
813 #endif
814
get_current_time(struct timeval * t)815 static void get_current_time(struct timeval *t)
816 {
817 #ifdef OPENSSL_SYS_WIN32
818 struct _timeb tb;
819 _ftime(&tb);
820 t->tv_sec = (long)tb.time;
821 t->tv_usec = (long)tb.millitm * 1000;
822 #elif defined(OPENSSL_SYS_VMS)
823 struct timeb tb;
824 ftime(&tb);
825 t->tv_sec = (long)tb.time;
826 t->tv_usec = (long)tb.millitm * 1000;
827 #else
828 gettimeofday(t, NULL);
829 #endif
830 }
831