ref: 2cdc6577ef8a251bf1740439cf5bfc47050dab41
dir: /third_party/boringssl/src/crypto/bio/fd.c/
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* 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.] */
#include <openssl/bio.h>
#if !defined(OPENSSL_TRUSTY)
#include <errno.h>
#include <string.h>
#if !defined(OPENSSL_WINDOWS)
#include <unistd.h>
#else
#include <io.h>
OPENSSL_MSVC_PRAGMA(warning(push, 3))
#include <windows.h>
OPENSSL_MSVC_PRAGMA(warning(pop))
#endif
#include <openssl/err.h>
#include <openssl/mem.h>
#include "internal.h"
#include "../internal.h"
static int bio_fd_non_fatal_error(int err) {
if (
#ifdef EWOULDBLOCK
err == EWOULDBLOCK ||
#endif
#ifdef WSAEWOULDBLOCK
err == WSAEWOULDBLOCK ||
#endif
#ifdef ENOTCONN
err == ENOTCONN ||
#endif
#ifdef EINTR
err == EINTR ||
#endif
#ifdef EAGAIN
err == EAGAIN ||
#endif
#ifdef EPROTO
err == EPROTO ||
#endif
#ifdef EINPROGRESS
err == EINPROGRESS ||
#endif
#ifdef EALREADY
err == EALREADY ||
#endif
0) {
return 1;
}
return 0;
}
#if defined(OPENSSL_WINDOWS)
#define BORINGSSL_ERRNO (int)GetLastError()
#define BORINGSSL_CLOSE _close
#define BORINGSSL_LSEEK _lseek
#define BORINGSSL_READ _read
#define BORINGSSL_WRITE _write
#else
#define BORINGSSL_ERRNO errno
#define BORINGSSL_CLOSE close
#define BORINGSSL_LSEEK lseek
#define BORINGSSL_READ read
#define BORINGSSL_WRITE write
#endif
int bio_fd_should_retry(int i) {
if (i == -1) {
return bio_fd_non_fatal_error(BORINGSSL_ERRNO);
}
return 0;
}
BIO *BIO_new_fd(int fd, int close_flag) {
BIO *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 *bio) {
// num is used to store the file descriptor.
bio->num = -1;
return 1;
}
static int fd_free(BIO *bio) {
if (bio->shutdown) {
if (bio->init) {
BORINGSSL_CLOSE(bio->num);
}
bio->init = 0;
}
return 1;
}
static int fd_read(BIO *b, char *out, int outl) {
int ret = 0;
ret = BORINGSSL_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 = BORINGSSL_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;
OPENSSL_FALLTHROUGH;
case BIO_C_FILE_SEEK:
ret = 0;
if (b->init) {
ret = (long)BORINGSSL_LSEEK(b->num, num, SEEK_SET);
}
break;
case BIO_C_FILE_TELL:
case BIO_CTRL_INFO:
ret = 0;
if (b->init) {
ret = (long)BORINGSSL_LSEEK(b->num, 0, SEEK_CUR);
}
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;
}
return 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_FLUSH:
ret = 1;
break;
default:
ret = 0;
break;
}
return ret;
}
static int fd_gets(BIO *bp, char *buf, int size) {
char *ptr = buf;
char *end = buf + size - 1;
if (size <= 0) {
return 0;
}
while (ptr < end && fd_read(bp, ptr, 1) > 0 && ptr[0] != '\n') {
ptr++;
}
ptr[0] = '\0';
return ptr - buf;
}
static const BIO_METHOD methods_fdp = {
BIO_TYPE_FD, "file descriptor", fd_write, fd_read, NULL /* puts */,
fd_gets, fd_ctrl, fd_new, fd_free, NULL /* callback_ctrl */,
};
const BIO_METHOD *BIO_s_fd(void) { return &methods_fdp; }
int BIO_set_fd(BIO *bio, int fd, int close_flag) {
return BIO_int_ctrl(bio, BIO_C_SET_FD, close_flag, fd);
}
int BIO_get_fd(BIO *bio, int *out_fd) {
return BIO_ctrl(bio, BIO_C_GET_FD, 0, (char *) out_fd);
}
#endif // OPENSSL_TRUSTY