-/* crypto/bio/bss_fd.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
+/*
+ * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
*
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*/
-#define BIO_FD
-#include "bss_sock.c"
-#undef BIO_FD
+#include <stdio.h>
+#include <errno.h>
+#include "bio_lcl.h"
+
+#if defined(OPENSSL_NO_POSIX_IO)
+/*
+ * Dummy placeholder for BIO_s_fd...
+ */
+BIO *BIO_new_fd(int fd, int close_flag)
+{
+ return NULL;
+}
+
+int BIO_fd_non_fatal_error(int err)
+{
+ return 0;
+}
+
+int BIO_fd_should_retry(int i)
+{
+ return 0;
+}
+
+const BIO_METHOD *BIO_s_fd(void)
+{
+ return NULL;
+}
+#else
+/*
+ * As for unconditional usage of "UPLINK" interface in this module.
+ * Trouble is that unlike Unix file descriptors [which are indexes
+ * in kernel-side per-process table], corresponding descriptors on
+ * platforms which require "UPLINK" interface seem to be indexes
+ * in a user-land, non-global table. Well, in fact they are indexes
+ * in stdio _iob[], and recall that _iob[] was the very reason why
+ * "UPLINK" interface was introduced in first place. But one way on
+ * another. Neither libcrypto or libssl use this BIO meaning that
+ * file descriptors can only be provided by application. Therefore
+ * "UPLINK" calls are due...
+ */
+static int fd_write(BIO *h, const char *buf, int num);
+static int fd_read(BIO *h, char *buf, int size);
+static int fd_puts(BIO *h, const char *str);
+static int fd_gets(BIO *h, char *buf, int size);
+static long fd_ctrl(BIO *h, int cmd, long arg1, void *arg2);
+static int fd_new(BIO *h);
+static int fd_free(BIO *data);
+int BIO_fd_should_retry(int s);
+
+static const BIO_METHOD methods_fdp = {
+ BIO_TYPE_FD, "file descriptor",
+ /* TODO: Convert to new style write function */
+ bwrite_conv,
+ fd_write,
+ /* TODO: Convert to new style read function */
+ bread_conv,
+ fd_read,
+ fd_puts,
+ fd_gets,
+ fd_ctrl,
+ fd_new,
+ fd_free,
+ NULL,
+};
+
+const BIO_METHOD *BIO_s_fd(void)
+{
+ return (&methods_fdp);
+}
+
+BIO *BIO_new_fd(int fd, int close_flag)
+{
+ BIO *ret;
+ ret = BIO_new(BIO_s_fd());
+ if (ret == NULL)
+ return (NULL);
+ BIO_set_fd(ret, fd, close_flag);
+ return (ret);
+}
+
+static int fd_new(BIO *bi)
+{
+ bi->init = 0;
+ bi->num = -1;
+ bi->ptr = NULL;
+ bi->flags = BIO_FLAGS_UPLINK; /* essentially redundant */
+ return (1);
+}
+
+static int fd_free(BIO *a)
+{
+ if (a == NULL)
+ return (0);
+ if (a->shutdown) {
+ if (a->init) {
+ UP_close(a->num);
+ }
+ a->init = 0;
+ a->flags = BIO_FLAGS_UPLINK;
+ }
+ return (1);
+}
+
+static int fd_read(BIO *b, char *out, int outl)
+{
+ int ret = 0;
+
+ if (out != NULL) {
+ clear_sys_error();
+ ret = UP_read(b->num, out, outl);
+ BIO_clear_retry_flags(b);
+ if (ret <= 0) {
+ if (BIO_fd_should_retry(ret))
+ BIO_set_retry_read(b);
+ }
+ }
+ return (ret);
+}
+
+static int fd_write(BIO *b, const char *in, int inl)
+{
+ int ret;
+ clear_sys_error();
+ ret = UP_write(b->num, in, inl);
+ BIO_clear_retry_flags(b);
+ if (ret <= 0) {
+ if (BIO_fd_should_retry(ret))
+ BIO_set_retry_write(b);
+ }
+ return (ret);
+}
+
+static long fd_ctrl(BIO *b, int cmd, long num, void *ptr)
+{
+ long ret = 1;
+ int *ip;
+
+ switch (cmd) {
+ case BIO_CTRL_RESET:
+ num = 0;
+ /* fall thru */
+ case BIO_C_FILE_SEEK:
+ ret = (long)UP_lseek(b->num, num, 0);
+ break;
+ case BIO_C_FILE_TELL:
+ case BIO_CTRL_INFO:
+ ret = (long)UP_lseek(b->num, 0, 1);
+ break;
+ case BIO_C_SET_FD:
+ fd_free(b);
+ b->num = *((int *)ptr);
+ b->shutdown = (int)num;
+ b->init = 1;
+ break;
+ case BIO_C_GET_FD:
+ if (b->init) {
+ ip = (int *)ptr;
+ if (ip != NULL)
+ *ip = b->num;
+ ret = b->num;
+ } else
+ ret = -1;
+ break;
+ case BIO_CTRL_GET_CLOSE:
+ ret = b->shutdown;
+ break;
+ case BIO_CTRL_SET_CLOSE:
+ b->shutdown = (int)num;
+ break;
+ case BIO_CTRL_PENDING:
+ case BIO_CTRL_WPENDING:
+ ret = 0;
+ break;
+ case BIO_CTRL_DUP:
+ case BIO_CTRL_FLUSH:
+ ret = 1;
+ break;
+ default:
+ ret = 0;
+ break;
+ }
+ return (ret);
+}
+
+static int fd_puts(BIO *bp, const char *str)
+{
+ int n, ret;
+
+ n = strlen(str);
+ ret = fd_write(bp, str, n);
+ return (ret);
+}
+
+static int fd_gets(BIO *bp, char *buf, int size)
+{
+ int ret = 0;
+ char *ptr = buf;
+ char *end = buf + size - 1;
+
+ while ((ptr < end) && (fd_read(bp, ptr, 1) > 0) && (ptr[0] != '\n'))
+ ptr++;
+
+ ptr[0] = '\0';
+
+ if (buf[0] != '\0')
+ ret = strlen(buf);
+ return (ret);
+}
+
+int BIO_fd_should_retry(int i)
+{
+ int err;
+
+ if ((i == 0) || (i == -1)) {
+ err = get_last_sys_error();
+
+ return (BIO_fd_non_fatal_error(err));
+ }
+ return (0);
+}
+
+int BIO_fd_non_fatal_error(int err)
+{
+ switch (err) {
+
+# ifdef EWOULDBLOCK
+# ifdef WSAEWOULDBLOCK
+# if WSAEWOULDBLOCK != EWOULDBLOCK
+ case EWOULDBLOCK:
+# endif
+# else
+ case EWOULDBLOCK:
+# endif
+# endif
+
+# if defined(ENOTCONN)
+ case ENOTCONN:
+# endif
+
+# ifdef EINTR
+ case EINTR:
+# endif
+
+# ifdef EAGAIN
+# if EWOULDBLOCK != EAGAIN
+ case EAGAIN:
+# endif
+# endif
+
+# ifdef EPROTO
+ case EPROTO:
+# endif
+
+# ifdef EINPROGRESS
+ case EINPROGRESS:
+# endif
+
+# ifdef EALREADY
+ case EALREADY:
+# endif
+ return (1);
+ default:
+ break;
+ }
+ return (0);
+}
+#endif
projects / openssl.git / blobdiff