diff options
Diffstat (limited to 'openssl/crypto/bio/bss_fd.c')
| -rw-r--r-- | openssl/crypto/bio/bss_fd.c | 294 |
1 files changed, 294 insertions, 0 deletions
diff --git a/openssl/crypto/bio/bss_fd.c b/openssl/crypto/bio/bss_fd.c new file mode 100644 index 000000000..4c229bf64 --- /dev/null +++ b/openssl/crypto/bio/bss_fd.c @@ -0,0 +1,294 @@ +/* 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" +/* + * 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 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, + NULL, /* 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); + } + +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); + } |