1 /* crypto/bio/bss_fd.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
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...
77 static int fd_write(BIO *h, const char *buf, int num);
78 static int fd_read(BIO *h, char *buf, int size);
79 static int fd_puts(BIO *h, const char *str);
80 static long fd_ctrl(BIO *h, int cmd, long arg1, void *arg2);
81 static int fd_new(BIO *h);
82 static int fd_free(BIO *data);
83 int BIO_fd_should_retry(int s);
85 static BIO_METHOD methods_fdp=
87 BIO_TYPE_FD,"file descriptor",
98 BIO_METHOD *BIO_s_fd(void)
100 return(&methods_fdp);
103 BIO *BIO_new_fd(int fd,int close_flag)
106 ret=BIO_new(BIO_s_fd());
107 if (ret == NULL) return(NULL);
108 BIO_set_fd(ret,fd,close_flag);
112 static int fd_new(BIO *bi)
117 bi->flags=BIO_FLAGS_UPLINK; /* essentially redundant */
121 static int fd_free(BIO *a)
123 if (a == NULL) return(0);
131 a->flags=BIO_FLAGS_UPLINK;
136 static int fd_read(BIO *b, char *out,int outl)
143 ret=UP_read(b->num,out,outl);
144 BIO_clear_retry_flags(b);
147 if (BIO_fd_should_retry(ret))
148 BIO_set_retry_read(b);
154 static int fd_write(BIO *b, const char *in, int inl)
158 ret=UP_write(b->num,in,inl);
159 BIO_clear_retry_flags(b);
162 if (BIO_fd_should_retry(ret))
163 BIO_set_retry_write(b);
168 static long fd_ctrl(BIO *b, int cmd, long num, void *ptr)
177 case BIO_C_FILE_SEEK:
178 ret=(long)UP_lseek(b->num,num,0);
180 case BIO_C_FILE_TELL:
182 ret=(long)UP_lseek(b->num,0,1);
186 b->num= *((int *)ptr);
187 b->shutdown=(int)num;
194 if (ip != NULL) *ip=b->num;
200 case BIO_CTRL_GET_CLOSE:
203 case BIO_CTRL_SET_CLOSE:
204 b->shutdown=(int)num;
206 case BIO_CTRL_PENDING:
207 case BIO_CTRL_WPENDING:
221 static int fd_puts(BIO *bp, const char *str)
226 ret=fd_write(bp,str,n);
230 int BIO_fd_should_retry(int i)
234 if ((i == 0) || (i == -1))
236 err=get_last_sys_error();
238 #if defined(OPENSSL_SYS_WINDOWS) && 0 /* more microsoft stupidity? perhaps not? Ben 4/1/99 */
239 if ((i == -1) && (err == 0))
243 return(BIO_fd_non_fatal_error(err));
248 int BIO_fd_non_fatal_error(int err)
254 # ifdef WSAEWOULDBLOCK
255 # if WSAEWOULDBLOCK != EWOULDBLOCK
263 #if defined(ENOTCONN)
272 #if EWOULDBLOCK != EAGAIN