/* crypto/bio/bss_sock.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"

#ifndef OPENSSL_NO_SOCK

# include <openssl/bio.h>

# ifdef WATT32

#  define sock_write SockWrite  /* Watt-32 uses same names */

#  define sock_read  SockRead

#  define sock_puts  SockPuts

# endif

static int sock_write(BIO *h, const char *buf, int num);

static int sock_read(BIO *h, char *buf, int size);

static int sock_puts(BIO *h, const char *str);

static long sock_ctrl(BIO *h, int cmd, long arg1, void *arg2);

static int sock_new(BIO *h);

static int sock_free(BIO *data);

int BIO_sock_should_retry(int s);

static BIO_METHOD methods_sockp = {

    BIO_TYPE_SOCKET,

    "socket",

    sock_write,

    sock_read,

    sock_puts,

    NULL,                       /* sock_gets, */

    sock_ctrl,

    sock_new,

    sock_free,

    NULL,

};

BIO_METHOD *BIO_s_socket(void)

{

    return (&methods_sockp);

}

BIO *BIO_new_socket(int fd, int close_flag)

{

    BIO *ret;

    ret = BIO_new(BIO_s_socket());

    if (ret == NULL)

        return (NULL);

    BIO_set_fd(ret, fd, close_flag);

    return (ret);

}

static int sock_new(BIO *bi)

{

    bi->init = 0;

    bi->num = 0;

    bi->ptr = NULL;

    bi->flags = 0;

    return (1);

}

static int sock_free(BIO *a)

{

    if (a == NULL)

        return (0);

    if (a->shutdown) {

        if (a->init) {

            SHUTDOWN2(a->num);

        }

        a->init = 0;

        a->flags = 0;

    }

    return (1);

}

static int sock_read(BIO *b, char *out, int outl)

{

    int ret = 0;

    if (out != NULL) {

        clear_socket_error();

        ret = readsocket(b->num, out, outl);

        BIO_clear_retry_flags(b);

        if (ret <= 0) {

            if (BIO_sock_should_retry(ret))

                BIO_set_retry_read(b);

        }

    }

    return (ret);

}

static int sock_write(BIO *b, const char *in, int inl)

{

    int ret;

    clear_socket_error();

    ret = writesocket(b->num, in, inl);

    BIO_clear_retry_flags(b);

    if (ret <= 0) {

        if (BIO_sock_should_retry(ret))

            BIO_set_retry_write(b);

    }

    return (ret);

}

static long sock_ctrl(BIO *b, int cmd, long num, void *ptr)

{

    long ret = 1;

    int *ip;

    switch (cmd) {

    case BIO_C_SET_FD:

        sock_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_DUP:

    case BIO_CTRL_FLUSH:

        ret = 1;

        break;

    default:

        ret = 0;

        break;

    }

    return (ret);

}

static int sock_puts(BIO *bp, const char *str)

{

    int n, ret;

    n = strlen(str);

    ret = sock_write(bp, str, n);

    return (ret);

}

int BIO_sock_should_retry(int i)

{

    int err;

    if ((i == 0) || (i == -1)) {

        err = get_last_socket_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_sock_non_fatal_error(err));

    }

    return (0);

}

int BIO_sock_non_fatal_error(int err)

{

    switch (err) {

# if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_NETWARE)

#  if defined(WSAEWOULDBLOCK)

    case WSAEWOULDBLOCK:

#  endif

#  if 0                         /* This appears to always be an error */

#   if defined(WSAENOTCONN)

    case WSAENOTCONN:

#   endif

#  endif

# endif

# 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                          /* #ifndef OPENSSL_NO_SOCK */