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-rw-r--r--src/lib/libcrypto/bio/bss_fd.c294
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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/*
64 * As for unconditional usage of "UPLINK" interface in this module.
65 * Trouble is that unlike Unix file descriptors [which are indexes
66 * in kernel-side per-process table], corresponding descriptors on
67 * platforms which require "UPLINK" interface seem to be indexes
68 * in a user-land, non-global table. Well, in fact they are indexes
69 * in stdio _iob[], and recall that _iob[] was the very reason why
70 * "UPLINK" interface was introduced in first place. But one way on
71 * another. Neither libcrypto or libssl use this BIO meaning that
72 * file descriptors can only be provided by application. Therefore
73 * "UPLINK" calls are due...
74 */
75#include "bio_lcl.h"
76
77static int fd_write(BIO *h, const char *buf, int num);
78static int fd_read(BIO *h, char *buf, int size);
79static int fd_puts(BIO *h, const char *str);
80static long fd_ctrl(BIO *h, int cmd, long arg1, void *arg2);
81static int fd_new(BIO *h);
82static int fd_free(BIO *data);
83int BIO_fd_should_retry(int s);
84
85static BIO_METHOD methods_fdp=
86 {
87 BIO_TYPE_FD,"file descriptor",
88 fd_write,
89 fd_read,
90 fd_puts,
91 NULL, /* fd_gets, */
92 fd_ctrl,
93 fd_new,
94 fd_free,
95 NULL,
96 };
97
98BIO_METHOD *BIO_s_fd(void)
99 {
100 return(&methods_fdp);
101 }
102
103BIO *BIO_new_fd(int fd,int close_flag)
104 {
105 BIO *ret;
106 ret=BIO_new(BIO_s_fd());
107 if (ret == NULL) return(NULL);
108 BIO_set_fd(ret,fd,close_flag);
109 return(ret);
110 }
111
112static int fd_new(BIO *bi)
113 {
114 bi->init=0;
115 bi->num=-1;
116 bi->ptr=NULL;
117 bi->flags=BIO_FLAGS_UPLINK; /* essentially redundant */
118 return(1);
119 }
120
121static int fd_free(BIO *a)
122 {
123 if (a == NULL) return(0);
124 if (a->shutdown)
125 {
126 if (a->init)
127 {
128 UP_close(a->num);
129 }
130 a->init=0;
131 a->flags=BIO_FLAGS_UPLINK;
132 }
133 return(1);
134 }
135
136static int fd_read(BIO *b, char *out,int outl)
137 {
138 int ret=0;
139
140 if (out != NULL)
141 {
142 clear_sys_error();
143 ret=UP_read(b->num,out,outl);
144 BIO_clear_retry_flags(b);
145 if (ret <= 0)
146 {
147 if (BIO_fd_should_retry(ret))
148 BIO_set_retry_read(b);
149 }
150 }
151 return(ret);
152 }
153
154static int fd_write(BIO *b, const char *in, int inl)
155 {
156 int ret;
157 clear_sys_error();
158 ret=UP_write(b->num,in,inl);
159 BIO_clear_retry_flags(b);
160 if (ret <= 0)
161 {
162 if (BIO_fd_should_retry(ret))
163 BIO_set_retry_write(b);
164 }
165 return(ret);
166 }
167
168static long fd_ctrl(BIO *b, int cmd, long num, void *ptr)
169 {
170 long ret=1;
171 int *ip;
172
173 switch (cmd)
174 {
175 case BIO_CTRL_RESET:
176 num=0;
177 case BIO_C_FILE_SEEK:
178 ret=(long)UP_lseek(b->num,num,0);
179 break;
180 case BIO_C_FILE_TELL:
181 case BIO_CTRL_INFO:
182 ret=(long)UP_lseek(b->num,0,1);
183 break;
184 case BIO_C_SET_FD:
185 fd_free(b);
186 b->num= *((int *)ptr);
187 b->shutdown=(int)num;
188 b->init=1;
189 break;
190 case BIO_C_GET_FD:
191 if (b->init)
192 {
193 ip=(int *)ptr;
194 if (ip != NULL) *ip=b->num;
195 ret=b->num;
196 }
197 else
198 ret= -1;
199 break;
200 case BIO_CTRL_GET_CLOSE:
201 ret=b->shutdown;
202 break;
203 case BIO_CTRL_SET_CLOSE:
204 b->shutdown=(int)num;
205 break;
206 case BIO_CTRL_PENDING:
207 case BIO_CTRL_WPENDING:
208 ret=0;
209 break;
210 case BIO_CTRL_DUP:
211 case BIO_CTRL_FLUSH:
212 ret=1;
213 break;
214 default:
215 ret=0;
216 break;
217 }
218 return(ret);
219 }
220
221static int fd_puts(BIO *bp, const char *str)
222 {
223 int n,ret;
224
225 n=strlen(str);
226 ret=fd_write(bp,str,n);
227 return(ret);
228 }
229
230int BIO_fd_should_retry(int i)
231 {
232 int err;
233
234 if ((i == 0) || (i == -1))
235 {
236 err=get_last_sys_error();
237
238#if defined(OPENSSL_SYS_WINDOWS) && 0 /* more microsoft stupidity? perhaps not? Ben 4/1/99 */
239 if ((i == -1) && (err == 0))
240 return(1);
241#endif
242
243 return(BIO_fd_non_fatal_error(err));
244 }
245 return(0);
246 }
247
248int BIO_fd_non_fatal_error(int err)
249 {
250 switch (err)
251 {
252
253#ifdef EWOULDBLOCK
254# ifdef WSAEWOULDBLOCK
255# if WSAEWOULDBLOCK != EWOULDBLOCK
256 case EWOULDBLOCK:
257# endif
258# else
259 case EWOULDBLOCK:
260# endif
261#endif
262
263#if defined(ENOTCONN)
264 case ENOTCONN:
265#endif
266
267#ifdef EINTR
268 case EINTR:
269#endif
270
271#ifdef EAGAIN
272#if EWOULDBLOCK != EAGAIN
273 case EAGAIN:
274# endif
275#endif
276
277#ifdef EPROTO
278 case EPROTO:
279#endif
280
281#ifdef EINPROGRESS
282 case EINPROGRESS:
283#endif
284
285#ifdef EALREADY
286 case EALREADY:
287#endif
288 return(1);
289 /* break; */
290 default:
291 break;
292 }
293 return(0);
294 }
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