1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.]
63 #if defined(OPENSSL_NO_POSIX_IO)
65 * Dummy placeholder for BIO_s_fd...
67 BIO *BIO_new_fd(int fd, int close_flag)
72 int BIO_fd_non_fatal_error(int err)
77 int BIO_fd_should_retry(int i)
82 const BIO_METHOD *BIO_s_fd(void)
88 * As for unconditional usage of "UPLINK" interface in this module.
89 * Trouble is that unlike Unix file descriptors [which are indexes
90 * in kernel-side per-process table], corresponding descriptors on
91 * platforms which require "UPLINK" interface seem to be indexes
92 * in a user-land, non-global table. Well, in fact they are indexes
93 * in stdio _iob[], and recall that _iob[] was the very reason why
94 * "UPLINK" interface was introduced in first place. But one way on
95 * another. Neither libcrypto or libssl use this BIO meaning that
96 * file descriptors can only be provided by application. Therefore
97 * "UPLINK" calls are due...
99 static int fd_write(BIO *h, const char *buf, int num);
100 static int fd_read(BIO *h, char *buf, int size);
101 static int fd_puts(BIO *h, const char *str);
102 static int fd_gets(BIO *h, char *buf, int size);
103 static long fd_ctrl(BIO *h, int cmd, long arg1, void *arg2);
104 static int fd_new(BIO *h);
105 static int fd_free(BIO *data);
106 int BIO_fd_should_retry(int s);
108 static const BIO_METHOD methods_fdp = {
109 BIO_TYPE_FD, "file descriptor",
120 const BIO_METHOD *BIO_s_fd(void)
122 return (&methods_fdp);
125 BIO *BIO_new_fd(int fd, int close_flag)
128 ret = BIO_new(BIO_s_fd());
131 BIO_set_fd(ret, fd, close_flag);
135 static int fd_new(BIO *bi)
140 bi->flags = BIO_FLAGS_UPLINK; /* essentially redundant */
144 static int fd_free(BIO *a)
153 a->flags = BIO_FLAGS_UPLINK;
158 static int fd_read(BIO *b, char *out, int outl)
164 ret = UP_read(b->num, out, outl);
165 BIO_clear_retry_flags(b);
167 if (BIO_fd_should_retry(ret))
168 BIO_set_retry_read(b);
174 static int fd_write(BIO *b, const char *in, int inl)
178 ret = UP_write(b->num, in, inl);
179 BIO_clear_retry_flags(b);
181 if (BIO_fd_should_retry(ret))
182 BIO_set_retry_write(b);
187 static long fd_ctrl(BIO *b, int cmd, long num, void *ptr)
195 case BIO_C_FILE_SEEK:
196 ret = (long)UP_lseek(b->num, num, 0);
198 case BIO_C_FILE_TELL:
200 ret = (long)UP_lseek(b->num, 0, 1);
204 b->num = *((int *)ptr);
205 b->shutdown = (int)num;
217 case BIO_CTRL_GET_CLOSE:
220 case BIO_CTRL_SET_CLOSE:
221 b->shutdown = (int)num;
223 case BIO_CTRL_PENDING:
224 case BIO_CTRL_WPENDING:
238 static int fd_puts(BIO *bp, const char *str)
243 ret = fd_write(bp, str, n);
247 static int fd_gets(BIO *bp, char *buf, int size)
251 char *end = buf + size - 1;
253 while ((ptr < end) && (fd_read(bp, ptr, 1) > 0) && (ptr[0] != '\n'))
263 int BIO_fd_should_retry(int i)
267 if ((i == 0) || (i == -1)) {
268 err = get_last_sys_error();
270 return (BIO_fd_non_fatal_error(err));
275 int BIO_fd_non_fatal_error(int err)
280 # ifdef WSAEWOULDBLOCK
281 # if WSAEWOULDBLOCK != EWOULDBLOCK
289 # if defined(ENOTCONN)
298 # if EWOULDBLOCK != EAGAIN