| /* crypto/bio/bss_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 <stdio.h> |
| #include <errno.h> |
| #define USE_SOCKETS |
| #include "cryptlib.h" |
| |
| #if defined(OPENSSL_NO_POSIX_IO) |
| /* |
| * One can argue that one should implement dummy placeholder for |
| * BIO_s_fd here... |
| */ |
| #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... |
| */ |
| # include "bio_lcl.h" |
| |
| 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 BIO_METHOD methods_fdp = { |
| BIO_TYPE_FD, "file descriptor", |
| fd_write, |
| fd_read, |
| fd_puts, |
| fd_gets, |
| fd_ctrl, |
| fd_new, |
| fd_free, |
| NULL, |
| }; |
| |
| 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; |
| 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(); |
| |
| # if defined(OPENSSL_SYS_WINDOWS) && 0/* more microsoft stupidity? perhaps |
| * not? Ben 4/1/99 */ |
| if ((i == -1) && (err == 0)) |
| return (1); |
| # endif |
| |
| 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); |
| /* break; */ |
| default: |
| break; |
| } |
| return (0); |
| } |
| #endif |