bss_sock.c revision 55714 
1122407Sharti/* crypto/bio/bss_sock.c */
2122407Sharti/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3122407Sharti * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to.  The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 *    notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 *    notice, this list of conditions and the following disclaimer in the
30 *    documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 *    must display the following acknowledgement:
33 *    "This product includes cryptographic software written by
34 *     Eric Young (eay@cryptsoft.com)"
35 *    The word 'cryptographic' can be left out if the rouines from the library
36 *    being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 *    the apps directory (application code) you must include an acknowledgement:
39 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed.  i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#if !defined(NO_SOCK) || defined(BIO_FD)
60
61#include <stdio.h>
62#include <errno.h>
63#define USE_SOCKETS
64#include "cryptlib.h"
65#include <openssl/bio.h>
66
67#ifndef BIO_FD
68static int sock_write(BIO *h,char *buf,int num);
69static int sock_read(BIO *h,char *buf,int size);
70static int sock_puts(BIO *h,char *str);
71static long sock_ctrl(BIO *h,int cmd,long arg1,char *arg2);
72static int sock_new(BIO *h);
73static int sock_free(BIO *data);
74int BIO_sock_should_retry(int s);
75#else
76
77static int fd_write(BIO *h,char *buf,int num);
78static int fd_read(BIO *h,char *buf,int size);
79static int fd_puts(BIO *h,char *str);
80static long fd_ctrl(BIO *h,int cmd,long arg1,char *arg2);
81static int fd_new(BIO *h);
82static int fd_free(BIO *data);
83int BIO_fd_should_retry(int s);
84#endif
85
86#ifndef BIO_FD
87static BIO_METHOD methods_sockp=
88	{
89	BIO_TYPE_SOCKET,
90	"socket",
91	sock_write,
92	sock_read,
93	sock_puts,
94	NULL, /* sock_gets, */
95	sock_ctrl,
96	sock_new,
97	sock_free,
98	};
99
100BIO_METHOD *BIO_s_socket(void)
101	{
102	return(&methods_sockp);
103	}
104#else
105static BIO_METHOD methods_fdp=
106	{
107	BIO_TYPE_FD,"file descriptor",
108	fd_write,
109	fd_read,
110	fd_puts,
111	NULL, /* fd_gets, */
112	fd_ctrl,
113	fd_new,
114	fd_free,
115	};
116
117BIO_METHOD *BIO_s_fd(void)
118	{
119	return(&methods_fdp);
120	}
121#endif
122
123#ifndef BIO_FD
124BIO *BIO_new_socket(int fd, int close_flag)
125#else
126BIO *BIO_new_fd(int fd,int close_flag)
127#endif
128	{
129	BIO *ret;
130
131#ifndef BIO_FD
132	ret=BIO_new(BIO_s_socket());
133#else
134	ret=BIO_new(BIO_s_fd());
135#endif
136	if (ret == NULL) return(NULL);
137	BIO_set_fd(ret,fd,close_flag);
138	return(ret);
139	}
140
141#ifndef BIO_FD
142static int sock_new(BIO *bi)
143#else
144static int fd_new(BIO *bi)
145#endif
146	{
147	bi->init=0;
148	bi->num=0;
149	bi->ptr=NULL;
150	bi->flags=0;
151	return(1);
152	}
153
154#ifndef BIO_FD
155static int sock_free(BIO *a)
156#else
157static int fd_free(BIO *a)
158#endif
159	{
160	if (a == NULL) return(0);
161	if (a->shutdown)
162		{
163		if (a->init)
164			{
165#ifndef BIO_FD
166			shutdown(a->num,2);
167			closesocket(a->num);
168#else			/* BIO_FD */
169			close(a->num);
170#endif
171
172			}
173		a->init=0;
174		a->flags=0;
175		}
176	return(1);
177	}
178
179#ifndef BIO_FD
180static int sock_read(BIO *b, char *out, int outl)
181#else
182static int fd_read(BIO *b, char *out,int outl)
183#endif
184	{
185	int ret=0;
186
187	if (out != NULL)
188		{
189#ifndef BIO_FD
190		clear_socket_error();
191		ret=readsocket(b->num,out,outl);
192#else
193		clear_sys_error();
194		ret=read(b->num,out,outl);
195#endif
196		BIO_clear_retry_flags(b);
197		if (ret <= 0)
198			{
199#ifndef BIO_FD
200			if (BIO_sock_should_retry(ret))
201#else
202			if (BIO_fd_should_retry(ret))
203#endif
204				BIO_set_retry_read(b);
205			}
206		}
207	return(ret);
208	}
209
210#ifndef BIO_FD
211static int sock_write(BIO *b, char *in, int inl)
212#else
213static int fd_write(BIO *b, char *in, int inl)
214#endif
215	{
216	int ret;
217
218#ifndef BIO_FD
219	clear_socket_error();
220	ret=writesocket(b->num,in,inl);
221#else
222	clear_sys_error();
223	ret=write(b->num,in,inl);
224#endif
225	BIO_clear_retry_flags(b);
226	if (ret <= 0)
227		{
228#ifndef BIO_FD
229		if (BIO_sock_should_retry(ret))
230#else
231		if (BIO_fd_should_retry(ret))
232#endif
233			BIO_set_retry_write(b);
234		}
235	return(ret);
236	}
237
238#ifndef BIO_FD
239static long sock_ctrl(BIO *b, int cmd, long num, char *ptr)
240#else
241static long fd_ctrl(BIO *b, int cmd, long num, char *ptr)
242#endif
243	{
244	long ret=1;
245	int *ip;
246
247	switch (cmd)
248		{
249	case BIO_CTRL_RESET:
250		num=0;
251	case BIO_C_FILE_SEEK:
252#ifdef BIO_FD
253		ret=(long)lseek(b->num,num,0);
254#else
255		ret=0;
256#endif
257		break;
258	case BIO_C_FILE_TELL:
259	case BIO_CTRL_INFO:
260#ifdef BIO_FD
261		ret=(long)lseek(b->num,0,1);
262#else
263		ret=0;
264#endif
265		break;
266	case BIO_C_SET_FD:
267#ifndef BIO_FD
268		sock_free(b);
269#else
270		fd_free(b);
271#endif
272		b->num= *((int *)ptr);
273		b->shutdown=(int)num;
274		b->init=1;
275		break;
276	case BIO_C_GET_FD:
277		if (b->init)
278			{
279			ip=(int *)ptr;
280			if (ip != NULL) *ip=b->num;
281			ret=b->num;
282			}
283		else
284			ret= -1;
285		break;
286	case BIO_CTRL_GET_CLOSE:
287		ret=b->shutdown;
288		break;
289	case BIO_CTRL_SET_CLOSE:
290		b->shutdown=(int)num;
291		break;
292	case BIO_CTRL_PENDING:
293	case BIO_CTRL_WPENDING:
294		ret=0;
295		break;
296	case BIO_CTRL_DUP:
297	case BIO_CTRL_FLUSH:
298		ret=1;
299		break;
300	default:
301		ret=0;
302		break;
303		}
304	return(ret);
305	}
306
307#ifdef undef
308static int sock_gets(BIO *bp, char *buf,int size)
309	{
310	return(-1);
311	}
312#endif
313
314#ifndef BIO_FD
315static int sock_puts(BIO *bp, char *str)
316#else
317static int fd_puts(BIO *bp, char *str)
318#endif
319	{
320	int n,ret;
321
322	n=strlen(str);
323#ifndef BIO_FD
324	ret=sock_write(bp,str,n);
325#else
326	ret=fd_write(bp,str,n);
327#endif
328	return(ret);
329	}
330
331#ifndef BIO_FD
332int BIO_sock_should_retry(int i)
333#else
334int BIO_fd_should_retry(int i)
335#endif
336	{
337	int err;
338
339	if ((i == 0) || (i == -1))
340		{
341#ifndef BIO_FD
342		err=get_last_socket_error();
343#else
344		err=get_last_sys_error();
345#endif
346
347#if defined(WINDOWS) && 0 /* more microsoft stupidity? perhaps not? Ben 4/1/99 */
348		if ((i == -1) && (err == 0))
349			return(1);
350#endif
351
352#ifndef BIO_FD
353		return(BIO_sock_non_fatal_error(err));
354#else
355		return(BIO_fd_non_fatal_error(err));
356#endif
357		}
358	return(0);
359	}
360
361#ifndef BIO_FD
362int BIO_sock_non_fatal_error(int err)
363#else
364int BIO_fd_non_fatal_error(int err)
365#endif
366	{
367	switch (err)
368		{
369#if !defined(BIO_FD) && defined(WINDOWS)
370# if defined(WSAEWOULDBLOCK)
371	case WSAEWOULDBLOCK:
372# endif
373
374# if 0 /* This appears to always be an error */
375#  if defined(WSAENOTCONN)
376	case WSAENOTCONN:
377#  endif
378# endif
379#endif
380
381#ifdef EWOULDBLOCK
382# ifdef WSAEWOULDBLOCK
383#  if WSAEWOULDBLOCK != EWOULDBLOCK
384	case EWOULDBLOCK:
385#  endif
386# else
387	case EWOULDBLOCK:
388# endif
389#endif
390
391#if defined(ENOTCONN)
392	case ENOTCONN:
393#endif
394
395#ifdef EINTR
396	case EINTR:
397#endif
398
399#ifdef EAGAIN
400#if EWOULDBLOCK != EAGAIN
401	case EAGAIN:
402# endif
403#endif
404
405#ifdef EPROTO
406	case EPROTO:
407#endif
408
409#ifdef EINPROGRESS
410	case EINPROGRESS:
411#endif
412
413#ifdef EALREADY
414	case EALREADY:
415#endif
416		return(1);
417		/* break; */
418	default:
419		break;
420		}
421	return(0);
422	}
423#endif
424