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diff --git a/src/lib/libcrypto/bio/bss_fd.c b/src/lib/libcrypto/bio/bss_fd.c
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1/* crypto/bio/bss_fd.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * 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#include <stdio.h>
60#include <errno.h>
61#define USE_SOCKETS
62#include "cryptlib.h"
63#include <openssl/bio.h>
64
65static int fd_write(BIO *h, const char *buf, int num);
66static int fd_read(BIO *h, char *buf, int size);
67static int fd_puts(BIO *h, const char *str);
68static long fd_ctrl(BIO *h, int cmd, long arg1, void *arg2);
69static int fd_new(BIO *h);
70static int fd_free(BIO *data);
71int BIO_fd_should_retry(int s);
72
73static BIO_METHOD methods_fdp=
74 {
75 BIO_TYPE_FD,"file descriptor",
76 fd_write,
77 fd_read,
78 fd_puts,
79 NULL, /* fd_gets, */
80 fd_ctrl,
81 fd_new,
82 fd_free,
83 NULL,
84 };
85
86BIO_METHOD *BIO_s_fd(void)
87 {
88 return(&methods_fdp);
89 }
90
91BIO *BIO_new_fd(int fd,int close_flag)
92 {
93 BIO *ret;
94 ret=BIO_new(BIO_s_fd());
95 if (ret == NULL) return(NULL);
96 BIO_set_fd(ret,fd,close_flag);
97 return(ret);
98 }
99
100static int fd_new(BIO *bi)
101 {
102 bi->init=0;
103 bi->num=0;
104 bi->ptr=NULL;
105 bi->flags=0;
106 return(1);
107 }
108
109static int fd_free(BIO *a)
110 {
111 if (a == NULL) return(0);
112 if (a->shutdown)
113 {
114 if (a->init)
115 {
116 close(a->num);
117 }
118 a->init=0;
119 a->flags=0;
120 }
121 return(1);
122 }
123
124static int fd_read(BIO *b, char *out,int outl)
125 {
126 int ret=0;
127
128 if (out != NULL)
129 {
130 clear_sys_error();
131 ret=read(b->num,out,outl);
132 BIO_clear_retry_flags(b);
133 if (ret <= 0)
134 {
135 if (BIO_fd_should_retry(ret))
136 BIO_set_retry_read(b);
137 }
138 }
139 return(ret);
140 }
141
142static int fd_write(BIO *b, const char *in, int inl)
143 {
144 int ret;
145 clear_sys_error();
146 ret=write(b->num,in,inl);
147 BIO_clear_retry_flags(b);
148 if (ret <= 0)
149 {
150 if (BIO_fd_should_retry(ret))
151 BIO_set_retry_write(b);
152 }
153 return(ret);
154 }
155
156static long fd_ctrl(BIO *b, int cmd, long num, void *ptr)
157 {
158 long ret=1;
159 int *ip;
160
161 switch (cmd)
162 {
163 case BIO_CTRL_RESET:
164 num=0;
165 case BIO_C_FILE_SEEK:
166 ret=(long)lseek(b->num,num,0);
167 break;
168 case BIO_C_FILE_TELL:
169 case BIO_CTRL_INFO:
170 ret=(long)lseek(b->num,0,1);
171 break;
172 case BIO_C_SET_FD:
173 fd_free(b);
174 b->num= *((int *)ptr);
175 b->shutdown=(int)num;
176 b->init=1;
177 break;
178 case BIO_C_GET_FD:
179 if (b->init)
180 {
181 ip=(int *)ptr;
182 if (ip != NULL) *ip=b->num;
183 ret=b->num;
184 }
185 else
186 ret= -1;
187 break;
188 case BIO_CTRL_GET_CLOSE:
189 ret=b->shutdown;
190 break;
191 case BIO_CTRL_SET_CLOSE:
192 b->shutdown=(int)num;
193 break;
194 case BIO_CTRL_PENDING:
195 case BIO_CTRL_WPENDING:
196 ret=0;
197 break;
198 case BIO_CTRL_DUP:
199 case BIO_CTRL_FLUSH:
200 ret=1;
201 break;
202 default:
203 ret=0;
204 break;
205 }
206 return(ret);
207 }
208
209static int fd_puts(BIO *bp, const char *str)
210 {
211 int n,ret;
212
213 n=strlen(str);
214 ret=fd_write(bp,str,n);
215 return(ret);
216 }
217
218int BIO_fd_should_retry(int i)
219 {
220 int err;
221
222 if ((i == 0) || (i == -1))
223 {
224 err=get_last_sys_error();
225
226#if defined(OPENSSL_SYS_WINDOWS) && 0 /* more microsoft stupidity? perhaps not? Ben 4/1/99 */
227 if ((i == -1) && (err == 0))
228 return(1);
229#endif
230
231 return(BIO_fd_non_fatal_error(err));
232 }
233 return(0);
234 }
235
236int BIO_fd_non_fatal_error(int err)
237 {
238 switch (err)
239 {
240
241#ifdef EWOULDBLOCK
242# ifdef WSAEWOULDBLOCK
243# if WSAEWOULDBLOCK != EWOULDBLOCK
244 case EWOULDBLOCK:
245# endif
246# else
247 case EWOULDBLOCK:
248# endif
249#endif
250
251#if defined(ENOTCONN)
252 case ENOTCONN:
253#endif
254
255#ifdef EINTR
256 case EINTR:
257#endif
258
259#ifdef EAGAIN
260#if EWOULDBLOCK != EAGAIN
261 case EAGAIN:
262# endif
263#endif
264
265#ifdef EPROTO
266 case EPROTO:
267#endif
268
269#ifdef EINPROGRESS
270 case EINPROGRESS:
271#endif
272
273#ifdef EALREADY
274 case EALREADY:
275#endif
276 return(1);
277 /* break; */
278 default:
279 break;
280 }
281 return(0);
282 }
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