bss_dgram.c revision 205128 
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
83static int dgram_write(BIO *h, const char *buf, int num);
84static int dgram_read(BIO *h, char *buf, int size);
85static int dgram_puts(BIO *h, const char *str);
86static long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2);
87static int dgram_new(BIO *h);
88static int dgram_free(BIO *data);
89static int dgram_clear(BIO *bio);
90
91static int BIO_dgram_should_retry(int s);
92
93static void get_current_time(struct timeval *t);
94
95static 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
109typedef struct bio_dgram_data_st
110	{
111	struct sockaddr peer;
112	unsigned int connected;
113	unsigned int _errno;
114	unsigned int mtu;
115	struct timeval next_timeout;
116	struct timeval socket_timeout;
117	} bio_dgram_data;
118
119BIO_METHOD *BIO_s_datagram(void)
120	{
121	return(&methods_dgramp);
122	}
123
124BIO *BIO_new_dgram(int fd, int close_flag)
125	{
126	BIO *ret;
127
128	ret=BIO_new(BIO_s_datagram());
129	if (ret == NULL) return(NULL);
130	BIO_set_fd(ret,fd,close_flag);
131	return(ret);
132	}
133
134static int dgram_new(BIO *bi)
135	{
136	bio_dgram_data *data = NULL;
137
138	bi->init=0;
139	bi->num=0;
140	data = OPENSSL_malloc(sizeof(bio_dgram_data));
141	if (data == NULL)
142		return 0;
143	memset(data, 0x00, sizeof(bio_dgram_data));
144    bi->ptr = data;
145
146	bi->flags=0;
147	return(1);
148	}
149
150static int dgram_free(BIO *a)
151	{
152	bio_dgram_data *data;
153
154	if (a == NULL) return(0);
155	if ( ! dgram_clear(a))
156		return 0;
157
158	data = (bio_dgram_data *)a->ptr;
159	if(data != NULL) OPENSSL_free(data);
160
161	return(1);
162	}
163
164static int dgram_clear(BIO *a)
165	{
166	if (a == NULL) return(0);
167	if (a->shutdown)
168		{
169		if (a->init)
170			{
171			SHUTDOWN2(a->num);
172			}
173		a->init=0;
174		a->flags=0;
175		}
176	return(1);
177	}
178
179static void dgram_adjust_rcv_timeout(BIO *b)
180	{
181#if defined(SO_RCVTIMEO)
182	bio_dgram_data *data = (bio_dgram_data *)b->ptr;
183	int sz = sizeof(int);
184
185	/* Is a timer active? */
186	if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0)
187		{
188		struct timeval timenow, timeleft;
189
190		/* Read current socket timeout */
191#ifdef OPENSSL_SYS_WINDOWS
192		int timeout;
193		if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
194					   (void*)&timeout, &sz) < 0)
195			{ perror("getsockopt"); }
196		else
197			{
198			data->socket_timeout.tv_sec = timeout / 1000;
199			data->socket_timeout.tv_usec = (timeout % 1000) * 1000;
200			}
201#else
202		if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
203						&(data->socket_timeout), (void *)&sz) < 0)
204			{ perror("getsockopt"); }
205#endif
206
207		/* Get current time */
208		get_current_time(&timenow);
209
210		/* Calculate time left until timer expires */
211		memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval));
212		timeleft.tv_sec -= timenow.tv_sec;
213		timeleft.tv_usec -= timenow.tv_usec;
214		if (timeleft.tv_usec < 0)
215			{
216			timeleft.tv_sec--;
217			timeleft.tv_usec += 1000000;
218			}
219
220		if (timeleft.tv_sec < 0)
221			{
222			timeleft.tv_sec = 0;
223			timeleft.tv_usec = 1;
224			}
225
226		/* Adjust socket timeout if next handhake message timer
227		 * will expire earlier.
228		 */
229		if ((data->socket_timeout.tv_sec == 0 && data->socket_timeout.tv_usec == 0) ||
230			(data->socket_timeout.tv_sec > timeleft.tv_sec) ||
231			(data->socket_timeout.tv_sec == timeleft.tv_sec &&
232			 data->socket_timeout.tv_usec >= timeleft.tv_usec))
233			{
234#ifdef OPENSSL_SYS_WINDOWS
235			timeout = timeleft.tv_sec * 1000 + timeleft.tv_usec / 1000;
236			if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
237						   (void*)&timeout, sizeof(timeout)) < 0)
238				{ perror("setsockopt"); }
239#else
240			if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &timeleft,
241							sizeof(struct timeval)) < 0)
242				{ perror("setsockopt"); }
243#endif
244			}
245		}
246#endif
247	}
248
249static void dgram_reset_rcv_timeout(BIO *b)
250	{
251#if defined(SO_RCVTIMEO)
252	bio_dgram_data *data = (bio_dgram_data *)b->ptr;
253
254	/* Is a timer active? */
255	if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0)
256		{
257#ifdef OPENSSL_SYS_WINDOWS
258		int timeout = data->socket_timeout.tv_sec * 1000 +
259					  data->socket_timeout.tv_usec / 1000;
260		if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
261					   (void*)&timeout, sizeof(timeout)) < 0)
262			{ perror("setsockopt"); }
263#else
264		if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &(data->socket_timeout),
265						sizeof(struct timeval)) < 0)
266			{ perror("setsockopt"); }
267#endif
268		}
269#endif
270	}
271
272static int dgram_read(BIO *b, char *out, int outl)
273	{
274	int ret=0;
275	bio_dgram_data *data = (bio_dgram_data *)b->ptr;
276
277	struct sockaddr peer;
278	int peerlen = sizeof(peer);
279
280	if (out != NULL)
281		{
282		clear_socket_error();
283		memset(&peer, 0x00, peerlen);
284		/* Last arg in recvfrom is signed on some platforms and
285		 * unsigned on others. It is of type socklen_t on some
286		 * but this is not universal. Cast to (void *) to avoid
287		 * compiler warnings.
288		 */
289		dgram_adjust_rcv_timeout(b);
290		ret=recvfrom(b->num,out,outl,0,&peer,(void *)&peerlen);
291		dgram_reset_rcv_timeout(b);
292
293		if ( ! data->connected  && ret >= 0)
294			BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &peer);
295
296		BIO_clear_retry_flags(b);
297		if (ret < 0)
298			{
299			if (BIO_dgram_should_retry(ret))
300				{
301				BIO_set_retry_read(b);
302				data->_errno = get_last_socket_error();
303				}
304			}
305		}
306	return(ret);
307	}
308
309static int dgram_write(BIO *b, const char *in, int inl)
310	{
311	int ret;
312	bio_dgram_data *data = (bio_dgram_data *)b->ptr;
313	clear_socket_error();
314
315    if ( data->connected )
316        ret=writesocket(b->num,in,inl);
317    else
318#if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK)
319        ret=sendto(b->num, (char *)in, inl, 0, &data->peer, sizeof(data->peer));
320#else
321        ret=sendto(b->num, in, inl, 0, &data->peer, sizeof(data->peer));
322#endif
323
324	BIO_clear_retry_flags(b);
325	if (ret <= 0)
326		{
327		if (BIO_dgram_should_retry(ret))
328			{
329			BIO_set_retry_write(b);
330			data->_errno = get_last_socket_error();
331
332#if 0 /* higher layers are responsible for querying MTU, if necessary */
333			if ( data->_errno == EMSGSIZE)
334				/* retrieve the new MTU */
335				BIO_ctrl(b, BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL);
336#endif
337			}
338		}
339	return(ret);
340	}
341
342static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
343	{
344	long ret=1;
345	int *ip;
346	struct sockaddr *to = NULL;
347	bio_dgram_data *data = NULL;
348#if defined(IP_MTU_DISCOVER) || defined(IP_MTU)
349	long sockopt_val = 0;
350	unsigned int sockopt_len = 0;
351#endif
352#ifdef OPENSSL_SYS_LINUX
353	socklen_t addr_len;
354	struct sockaddr_storage addr;
355#endif
356
357	data = (bio_dgram_data *)b->ptr;
358
359	switch (cmd)
360		{
361	case BIO_CTRL_RESET:
362		num=0;
363	case BIO_C_FILE_SEEK:
364		ret=0;
365		break;
366	case BIO_C_FILE_TELL:
367	case BIO_CTRL_INFO:
368		ret=0;
369		break;
370	case BIO_C_SET_FD:
371		dgram_clear(b);
372		b->num= *((int *)ptr);
373		b->shutdown=(int)num;
374		b->init=1;
375		break;
376	case BIO_C_GET_FD:
377		if (b->init)
378			{
379			ip=(int *)ptr;
380			if (ip != NULL) *ip=b->num;
381			ret=b->num;
382			}
383		else
384			ret= -1;
385		break;
386	case BIO_CTRL_GET_CLOSE:
387		ret=b->shutdown;
388		break;
389	case BIO_CTRL_SET_CLOSE:
390		b->shutdown=(int)num;
391		break;
392	case BIO_CTRL_PENDING:
393	case BIO_CTRL_WPENDING:
394		ret=0;
395		break;
396	case BIO_CTRL_DUP:
397	case BIO_CTRL_FLUSH:
398		ret=1;
399		break;
400	case BIO_CTRL_DGRAM_CONNECT:
401		to = (struct sockaddr *)ptr;
402#if 0
403		if (connect(b->num, to, sizeof(struct sockaddr)) < 0)
404			{ perror("connect"); ret = 0; }
405		else
406			{
407#endif
408			memcpy(&(data->peer),to, sizeof(struct sockaddr));
409#if 0
410			}
411#endif
412		break;
413		/* (Linux)kernel sets DF bit on outgoing IP packets */
414	case BIO_CTRL_DGRAM_MTU_DISCOVER:
415#ifdef OPENSSL_SYS_LINUX
416		addr_len = (socklen_t)sizeof(struct sockaddr_storage);
417		memset((void *)&addr, 0, sizeof(struct sockaddr_storage));
418		if (getsockname(b->num, (void *)&addr, &addr_len) < 0)
419			{
420			ret = 0;
421			break;
422			}
423		sockopt_len = sizeof(sockopt_val);
424		switch (addr.ss_family)
425			{
426		case AF_INET:
427			sockopt_val = IP_PMTUDISC_DO;
428			if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
429				&sockopt_val, sizeof(sockopt_val))) < 0)
430				perror("setsockopt");
431			break;
432		case AF_INET6:
433			sockopt_val = IPV6_PMTUDISC_DO;
434			if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
435				&sockopt_val, sizeof(sockopt_val))) < 0)
436				perror("setsockopt");
437			break;
438		default:
439			ret = -1;
440			break;
441			}
442		ret = -1;
443#else
444		break;
445#endif
446	case BIO_CTRL_DGRAM_QUERY_MTU:
447#ifdef OPENSSL_SYS_LINUX
448		addr_len = (socklen_t)sizeof(struct sockaddr_storage);
449		memset((void *)&addr, 0, sizeof(struct sockaddr_storage));
450		if (getsockname(b->num, (void *)&addr, &addr_len) < 0)
451			{
452			ret = 0;
453			break;
454			}
455		sockopt_len = sizeof(sockopt_val);
456		switch (addr.ss_family)
457			{
458		case AF_INET:
459			if ((ret = getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
460				&sockopt_len)) < 0 || sockopt_val < 0)
461				{
462				ret = 0;
463				}
464			else
465				{
466				/* we assume that the transport protocol is UDP and no
467				 * IP options are used.
468				 */
469				data->mtu = sockopt_val - 8 - 20;
470				ret = data->mtu;
471				}
472			break;
473		case AF_INET6:
474			if ((ret = getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU, (void *)&sockopt_val,
475				&sockopt_len)) < 0 || sockopt_val < 0)
476				{
477				ret = 0;
478				}
479			else
480				{
481				/* we assume that the transport protocol is UDP and no
482				 * IPV6 options are used.
483				 */
484				data->mtu = sockopt_val - 8 - 40;
485				ret = data->mtu;
486				}
487			break;
488		default:
489			ret = 0;
490			break;
491			}
492#else
493		ret = 0;
494#endif
495		break;
496	case BIO_CTRL_DGRAM_GET_MTU:
497		return data->mtu;
498		break;
499	case BIO_CTRL_DGRAM_SET_MTU:
500		data->mtu = num;
501		ret = num;
502		break;
503	case BIO_CTRL_DGRAM_SET_CONNECTED:
504		to = (struct sockaddr *)ptr;
505
506		if ( to != NULL)
507			{
508			data->connected = 1;
509			memcpy(&(data->peer),to, sizeof(struct sockaddr));
510			}
511		else
512			{
513			data->connected = 0;
514			memset(&(data->peer), 0x00, sizeof(struct sockaddr));
515			}
516		break;
517    case BIO_CTRL_DGRAM_GET_PEER:
518        to = (struct sockaddr *) ptr;
519
520        memcpy(to, &(data->peer), sizeof(struct sockaddr));
521		ret = sizeof(struct sockaddr);
522        break;
523    case BIO_CTRL_DGRAM_SET_PEER:
524        to = (struct sockaddr *) ptr;
525
526        memcpy(&(data->peer), to, sizeof(struct sockaddr));
527        break;
528	case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
529		memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
530		break;
531#if defined(SO_RCVTIMEO)
532	case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
533#ifdef OPENSSL_SYS_WINDOWS
534		{
535		struct timeval *tv = (struct timeval *)ptr;
536		int timeout = tv->tv_sec * 1000 + tv->tv_usec/1000;
537		if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
538			(void*)&timeout, sizeof(timeout)) < 0)
539			{ perror("setsockopt"); ret = -1; }
540		}
541#else
542		if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
543			sizeof(struct timeval)) < 0)
544			{ perror("setsockopt");	ret = -1; }
545#endif
546		break;
547	case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
548#ifdef OPENSSL_SYS_WINDOWS
549		{
550		int timeout, sz = sizeof(timeout);
551		struct timeval *tv = (struct timeval *)ptr;
552		if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
553			(void*)&timeout, &sz) < 0)
554			{ perror("getsockopt"); ret = -1; }
555		else
556			{
557			tv->tv_sec = timeout / 1000;
558			tv->tv_usec = (timeout % 1000) * 1000;
559			ret = sizeof(*tv);
560			}
561		}
562#else
563		if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
564			ptr, (void *)&ret) < 0)
565			{ perror("getsockopt"); ret = -1; }
566#endif
567		break;
568#endif
569#if defined(SO_SNDTIMEO)
570	case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
571#ifdef OPENSSL_SYS_WINDOWS
572		{
573		struct timeval *tv = (struct timeval *)ptr;
574		int timeout = tv->tv_sec * 1000 + tv->tv_usec/1000;
575		if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
576			(void*)&timeout, sizeof(timeout)) < 0)
577			{ perror("setsockopt"); ret = -1; }
578		}
579#else
580		if ( setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
581			sizeof(struct timeval)) < 0)
582			{ perror("setsockopt");	ret = -1; }
583#endif
584		break;
585	case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
586#ifdef OPENSSL_SYS_WINDOWS
587		{
588		int timeout, sz = sizeof(timeout);
589		struct timeval *tv = (struct timeval *)ptr;
590		if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
591			(void*)&timeout, &sz) < 0)
592			{ perror("getsockopt"); ret = -1; }
593		else
594			{
595			tv->tv_sec = timeout / 1000;
596			tv->tv_usec = (timeout % 1000) * 1000;
597			ret = sizeof(*tv);
598			}
599		}
600#else
601		if ( getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
602			ptr, (void *)&ret) < 0)
603			{ perror("getsockopt"); ret = -1; }
604#endif
605		break;
606#endif
607	case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
608		/* fall-through */
609	case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
610#ifdef OPENSSL_SYS_WINDOWS
611		if ( data->_errno == WSAETIMEDOUT)
612#else
613		if ( data->_errno == EAGAIN)
614#endif
615			{
616			ret = 1;
617			data->_errno = 0;
618			}
619		else
620			ret = 0;
621		break;
622#ifdef EMSGSIZE
623	case BIO_CTRL_DGRAM_MTU_EXCEEDED:
624		if ( data->_errno == EMSGSIZE)
625			{
626			ret = 1;
627			data->_errno = 0;
628			}
629		else
630			ret = 0;
631		break;
632#endif
633	default:
634		ret=0;
635		break;
636		}
637	return(ret);
638	}
639
640static int dgram_puts(BIO *bp, const char *str)
641	{
642	int n,ret;
643
644	n=strlen(str);
645	ret=dgram_write(bp,str,n);
646	return(ret);
647	}
648
649static int BIO_dgram_should_retry(int i)
650	{
651	int err;
652
653	if ((i == 0) || (i == -1))
654		{
655		err=get_last_socket_error();
656
657#if defined(OPENSSL_SYS_WINDOWS) && 0 /* more microsoft stupidity? perhaps not? Ben 4/1/99 */
658		if ((i == -1) && (err == 0))
659			return(1);
660#endif
661
662		return(BIO_dgram_non_fatal_error(err));
663		}
664	return(0);
665	}
666
667int BIO_dgram_non_fatal_error(int err)
668	{
669	switch (err)
670		{
671#if defined(OPENSSL_SYS_WINDOWS)
672# if defined(WSAEWOULDBLOCK)
673	case WSAEWOULDBLOCK:
674# endif
675
676# if 0 /* This appears to always be an error */
677#  if defined(WSAENOTCONN)
678	case WSAENOTCONN:
679#  endif
680# endif
681#endif
682
683#ifdef EWOULDBLOCK
684# ifdef WSAEWOULDBLOCK
685#  if WSAEWOULDBLOCK != EWOULDBLOCK
686	case EWOULDBLOCK:
687#  endif
688# else
689	case EWOULDBLOCK:
690# endif
691#endif
692
693#ifdef EINTR
694	case EINTR:
695#endif
696
697#ifdef EAGAIN
698#if EWOULDBLOCK != EAGAIN
699	case EAGAIN:
700# endif
701#endif
702
703#ifdef EPROTO
704	case EPROTO:
705#endif
706
707#ifdef EINPROGRESS
708	case EINPROGRESS:
709#endif
710
711#ifdef EALREADY
712	case EALREADY:
713#endif
714
715		return(1);
716		/* break; */
717	default:
718		break;
719		}
720	return(0);
721	}
722#endif
723
724static void get_current_time(struct timeval *t)
725	{
726#ifdef OPENSSL_SYS_WIN32
727	struct _timeb tb;
728	_ftime(&tb);
729	t->tv_sec = (long)tb.time;
730	t->tv_usec = (long)tb.millitm * 1000;
731#elif defined(OPENSSL_SYS_VMS)
732	struct timeb tb;
733	ftime(&tb);
734	t->tv_sec = (long)tb.time;
735	t->tv_usec = (long)tb.millitm * 1000;
736#else
737	gettimeofday(t, NULL);
738#endif
739	}
740