/* apps/s_client.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.]

 */

/* ====================================================================

 * Copyright (c) 1998-2001 The OpenSSL Project.  All rights reserved.

 *

 * 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 above 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 acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"

 *

 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to

 *    endorse or promote products derived from this software without

 *    prior written permission. For written permission, please contact

 *    openssl-core@openssl.org.

 *

 * 5. Products derived from this software may not be called "OpenSSL"

 *    nor may "OpenSSL" appear in their names without prior written

 *    permission of the OpenSSL Project.

 *

 * 6. Redistributions of any form whatsoever must retain the following

 *    acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"

 *

 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

 * EXPRESSED 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 OpenSSL PROJECT OR

 * ITS 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.

 * ====================================================================

 *

 * This product includes cryptographic software written by Eric Young

 * (eay@cryptsoft.com).  This product includes software written by Tim

 * Hudson (tjh@cryptsoft.com).

 *

 */

#include <assert.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <sys/select.h>

#include <openssl/e_os2.h>

#ifdef OPENSSL_NO_STDIO

#define APPS_WIN16

#endif

/* With IPv6, it looks like Digital has mixed up the proper order of

   recursive header file inclusion, resulting in the compiler complaining

   that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which

   is needed to have fileno() declared correctly...  So let's define u_int */

#if defined(OPENSSL_SYS_VMS_DECC) && !defined(__U_INT)

#define __U_INT

typedef unsigned int u_int;

#endif

#define USE_SOCKETS

#include "apps.h"

#include <openssl/x509.h>

#include <openssl/ssl.h>

#include <openssl/err.h>

#include <openssl/pem.h>

#include <openssl/rand.h>

#include "s_apps.h"

#include "timeouts.h"

#ifdef OPENSSL_SYS_WINCE

/* Windows CE incorrectly defines fileno as returning void*, so to avoid problems below... */

#ifdef fileno

#undef fileno

#endif

#define fileno(a) (int)_fileno(a)

#endif

#if (defined(OPENSSL_SYS_VMS) && __VMS_VER < 70000000)

/* FIONBIO used as a switch to enable ioctl, and that isn't in VMS < 7.0 */

#undef FIONBIO

#endif

#undef PROG

#define PROG	s_client_main

/*#define SSL_HOST_NAME	"www.netscape.com" */

/*#define SSL_HOST_NAME	"193.118.187.102" */

#define SSL_HOST_NAME	"localhost"

/*#define TEST_CERT "client.pem" */ /* no default cert. */

#undef BUFSIZZ

#define BUFSIZZ 1024*8

extern int verify_depth;

extern int verify_error;

#ifdef FIONBIO

static int c_nbio=0;

#endif

static int c_Pause=0;

static int c_debug=0;

static int c_msg=0;

static int c_showcerts=0;

static void sc_usage(void);

static void print_stuff(BIO *berr,SSL *con,int full);

static BIO *bio_c_out=NULL;

static int c_quiet=0;

static int c_ign_eof=0;

static void sc_usage(void)

	{

	BIO_printf(bio_err,"usage: s_client args\n");

	BIO_printf(bio_err,"\n");

	BIO_printf(bio_err," -host host     - use -connect instead\n");

	BIO_printf(bio_err," -port port     - use -connect instead\n");

	BIO_printf(bio_err," -connect host:port - who to connect to (default is %s:%s)\n",SSL_HOST_NAME,PORT_STR);

	BIO_printf(bio_err," -verify arg   - turn on peer certificate verification\n");

	BIO_printf(bio_err," -cert arg     - certificate file to use, PEM format assumed\n");

	BIO_printf(bio_err," -certform arg - certificate format (PEM or DER) PEM default\n");

	BIO_printf(bio_err," -key arg      - Private key file to use, in cert file if\n");

	BIO_printf(bio_err,"                 not specified but cert file is.\n");

	BIO_printf(bio_err," -keyform arg  - key format (PEM or DER) PEM default\n");

	BIO_printf(bio_err," -pass arg     - private key file pass phrase source\n");

	BIO_printf(bio_err," -CApath arg   - PEM format directory of CA's\n");

	BIO_printf(bio_err," -CAfile arg   - PEM format file of CA's\n");

	BIO_printf(bio_err," -reconnect    - Drop and re-make the connection with the same Session-ID\n");

	BIO_printf(bio_err," -pause        - sleep(1) after each read(2) and write(2) system call\n");

	BIO_printf(bio_err," -showcerts    - show all certificates in the chain\n");

	BIO_printf(bio_err," -debug        - extra output\n");

#ifdef WATT32

	BIO_printf(bio_err," -wdebug       - WATT-32 tcp debugging\n");

#endif

	BIO_printf(bio_err," -msg          - Show protocol messages\n");

	BIO_printf(bio_err," -nbio_test    - more ssl protocol testing\n");

	BIO_printf(bio_err," -state        - print the 'ssl' states\n");

#ifdef FIONBIO

	BIO_printf(bio_err," -nbio         - Run with non-blocking IO\n");

#endif

	BIO_printf(bio_err," -crlf         - convert LF from terminal into CRLF\n");

	BIO_printf(bio_err," -quiet        - no s_client output\n");

	BIO_printf(bio_err," -ign_eof      - ignore input eof (default when -quiet)\n");

	BIO_printf(bio_err," -ssl2         - just use SSLv2\n");

	BIO_printf(bio_err," -ssl3         - just use SSLv3\n");

	BIO_printf(bio_err," -tls1         - just use TLSv1\n");

	BIO_printf(bio_err," -dtls1        - just use DTLSv1\n");    

	BIO_printf(bio_err," -mtu          - set the MTU\n");

	BIO_printf(bio_err," -no_tls1/-no_ssl3/-no_ssl2 - turn off that protocol\n");

	BIO_printf(bio_err," -bugs         - Switch on all SSL implementation bug workarounds\n");

	BIO_printf(bio_err," -serverpref   - Use server's cipher preferences (only SSLv2)\n");

	BIO_printf(bio_err," -cipher       - preferred cipher to use, use the 'openssl ciphers'\n");

	BIO_printf(bio_err,"                 command to see what is available\n");

	BIO_printf(bio_err," -starttls prot - use the STARTTLS command before starting TLS\n");

	BIO_printf(bio_err,"                 for those protocols that support it, where\n");

	BIO_printf(bio_err,"                 'prot' defines which one to assume.  Currently,\n");

	BIO_printf(bio_err,"                 only \"smtp\" and \"pop3\" are supported.\n");

#ifndef OPENSSL_NO_ENGINE

	BIO_printf(bio_err," -engine id    - Initialise and use the specified engine\n");

#endif

	BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);

	}

int MAIN(int, char **);

int MAIN(int argc, char **argv)

	{

	int off=0;

	SSL *con=NULL,*con2=NULL;

	X509_STORE *store = NULL;

	int s,k,width,state=0;

	char *cbuf=NULL,*sbuf=NULL,*mbuf=NULL;

	int cbuf_len,cbuf_off;

	int sbuf_len,sbuf_off;

	fd_set readfds,writefds;

	short port=PORT;

	int full_log=1;

	char *host=SSL_HOST_NAME;

	char *cert_file=NULL,*key_file=NULL;

	int cert_format = FORMAT_PEM, key_format = FORMAT_PEM;

	char *passarg = NULL, *pass = NULL;

	X509 *cert = NULL;

	EVP_PKEY *key = NULL;

	char *CApath=NULL,*CAfile=NULL,*cipher=NULL;

	int reconnect=0,badop=0,verify=SSL_VERIFY_NONE,bugs=0;

	int crlf=0;

	int write_tty,read_tty,write_ssl,read_ssl,tty_on,ssl_pending;

	SSL_CTX *ctx=NULL;

	int ret=1,in_init=1,i,nbio_test=0;

	int starttls_proto = 0;

	int prexit = 0, vflags = 0;

	SSL_METHOD *meth=NULL;

#ifdef sock_type

#undef sock_type

#endif

	int sock_type=SOCK_STREAM;

	BIO *sbio;

	char *inrand=NULL;

#ifndef OPENSSL_NO_ENGINE

	char *engine_id=NULL;

	ENGINE *e=NULL;

#endif

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

	struct timeval tv;

#endif

	struct sockaddr peer;

	int peerlen = sizeof(peer);

	int enable_timeouts = 0 ;

	long mtu = 0;

#if !defined(OPENSSL_NO_SSL2) && !defined(OPENSSL_NO_SSL3)

	meth=SSLv23_client_method();

#elif !defined(OPENSSL_NO_SSL3)

	meth=SSLv3_client_method();

#elif !defined(OPENSSL_NO_SSL2)

	meth=SSLv2_client_method();

#endif

	apps_startup();

	c_Pause=0;

	c_quiet=0;

	c_ign_eof=0;

	c_debug=0;

	c_msg=0;

	c_showcerts=0;

	if (bio_err == NULL)

		bio_err=BIO_new_fp(stderr,BIO_NOCLOSE);

	if (!load_config(bio_err, NULL))

		goto end;

	if (	((cbuf=OPENSSL_malloc(BUFSIZZ)) == NULL) ||

		((sbuf=OPENSSL_malloc(BUFSIZZ)) == NULL) ||

		((mbuf=OPENSSL_malloc(BUFSIZZ)) == NULL))

		{

		BIO_printf(bio_err,"out of memory\n");

		goto end;

		}

	verify_depth=0;

	verify_error=X509_V_OK;

#ifdef FIONBIO

	c_nbio=0;

#endif

	argc--;

	argv++;

	while (argc >= 1)

		{

		if	(strcmp(*argv,"-host") == 0)

			{

			if (--argc < 1) goto bad;

			host= *(++argv);

			}

		else if	(strcmp(*argv,"-port") == 0)

			{

			if (--argc < 1) goto bad;

			port=atoi(*(++argv));

			if (port == 0) goto bad;

			}

		else if (strcmp(*argv,"-connect") == 0)

			{

			if (--argc < 1) goto bad;

			if (!extract_host_port(*(++argv),&host,NULL,&port))

				goto bad;

			}

		else if	(strcmp(*argv,"-verify") == 0)

			{

			verify=SSL_VERIFY_PEER;

			if (--argc < 1) goto bad;

			verify_depth=atoi(*(++argv));

			BIO_printf(bio_err,"verify depth is %d\n",verify_depth);

			}

		else if	(strcmp(*argv,"-cert") == 0)

			{

			if (--argc < 1) goto bad;

			cert_file= *(++argv);

			}

		else if	(strcmp(*argv,"-certform") == 0)

			{

			if (--argc < 1) goto bad;

			cert_format = str2fmt(*(++argv));

			}

		else if	(strcmp(*argv,"-crl_check") == 0)

			vflags |= X509_V_FLAG_CRL_CHECK;

		else if	(strcmp(*argv,"-crl_check_all") == 0)

			vflags |= X509_V_FLAG_CRL_CHECK|X509_V_FLAG_CRL_CHECK_ALL;

		else if	(strcmp(*argv,"-prexit") == 0)

			prexit=1;

		else if	(strcmp(*argv,"-crlf") == 0)

			crlf=1;

		else if	(strcmp(*argv,"-quiet") == 0)

			{

			c_quiet=1;

			c_ign_eof=1;

			}

		else if	(strcmp(*argv,"-ign_eof") == 0)

			c_ign_eof=1;

		else if	(strcmp(*argv,"-pause") == 0)

			c_Pause=1;

		else if	(strcmp(*argv,"-debug") == 0)

			c_debug=1;

#ifdef WATT32

		else if (strcmp(*argv,"-wdebug") == 0)

			dbug_init();

#endif

		else if	(strcmp(*argv,"-msg") == 0)

			c_msg=1;

		else if	(strcmp(*argv,"-showcerts") == 0)

			c_showcerts=1;

		else if	(strcmp(*argv,"-nbio_test") == 0)

			nbio_test=1;

		else if	(strcmp(*argv,"-state") == 0)

			state=1;

#ifndef OPENSSL_NO_SSL2

		else if	(strcmp(*argv,"-ssl2") == 0)

			meth=SSLv2_client_method();

#endif

#ifndef OPENSSL_NO_SSL3

		else if	(strcmp(*argv,"-ssl3") == 0)

			meth=SSLv3_client_method();

#endif

#ifndef OPENSSL_NO_TLS1

		else if	(strcmp(*argv,"-tls1") == 0)

			meth=TLSv1_client_method();

#endif

#ifndef OPENSSL_NO_DTLS1

		else if	(strcmp(*argv,"-dtls1") == 0)

			{

			meth=DTLSv1_client_method();

			sock_type=SOCK_DGRAM;

			}

		else if (strcmp(*argv,"-timeout") == 0)

			enable_timeouts=1;

		else if (strcmp(*argv,"-mtu") == 0)

			{

			if (--argc < 1) goto bad;

			mtu = atol(*(++argv));

			}

#endif

		else if (strcmp(*argv,"-bugs") == 0)

			bugs=1;

		else if	(strcmp(*argv,"-keyform") == 0)

			{

			if (--argc < 1) goto bad;

			key_format = str2fmt(*(++argv));

			}

		else if	(strcmp(*argv,"-pass") == 0)

			{

			if (--argc < 1) goto bad;

			passarg = *(++argv);

			}

		else if	(strcmp(*argv,"-key") == 0)

			{

			if (--argc < 1) goto bad;

			key_file= *(++argv);

			}

		else if	(strcmp(*argv,"-reconnect") == 0)

			{

			reconnect=5;

			}

		else if	(strcmp(*argv,"-CApath") == 0)

			{

			if (--argc < 1) goto bad;

			CApath= *(++argv);

			}

		else if	(strcmp(*argv,"-CAfile") == 0)

			{

			if (--argc < 1) goto bad;

			CAfile= *(++argv);

			}

		else if (strcmp(*argv,"-no_tls1") == 0)

			off|=SSL_OP_NO_TLSv1;

		else if (strcmp(*argv,"-no_ssl3") == 0)

			off|=SSL_OP_NO_SSLv3;

		else if (strcmp(*argv,"-no_ssl2") == 0)

			off|=SSL_OP_NO_SSLv2;

		else if (strcmp(*argv,"-serverpref") == 0)

			off|=SSL_OP_CIPHER_SERVER_PREFERENCE;

		else if	(strcmp(*argv,"-cipher") == 0)

			{

			if (--argc < 1) goto bad;

			cipher= *(++argv);

			}

#ifdef FIONBIO

		else if (strcmp(*argv,"-nbio") == 0)

			{ c_nbio=1; }

#endif

		else if	(strcmp(*argv,"-starttls") == 0)

			{

			if (--argc < 1) goto bad;

			++argv;

			if (strcmp(*argv,"smtp") == 0)

				starttls_proto = 1;

			else if (strcmp(*argv,"pop3") == 0)

				starttls_proto = 2;

			else

				goto bad;

			}

#ifndef OPENSSL_NO_ENGINE

		else if	(strcmp(*argv,"-engine") == 0)

			{

			if (--argc < 1) goto bad;

			engine_id = *(++argv);

			}

#endif

		else if (strcmp(*argv,"-rand") == 0)

			{

			if (--argc < 1) goto bad;

			inrand= *(++argv);

			}

		else

			{

			BIO_printf(bio_err,"unknown option %s\n",*argv);

			badop=1;

			break;

			}

		argc--;

		argv++;

		}

	if (badop)

		{

bad:

		sc_usage();

		goto end;

		}

	OpenSSL_add_ssl_algorithms();

	SSL_load_error_strings();

#ifndef OPENSSL_NO_ENGINE

        e = setup_engine(bio_err, engine_id, 1);

#endif

	if (!app_passwd(bio_err, passarg, NULL, &pass, NULL))

		{

		BIO_printf(bio_err, "Error getting password\n");

		goto end;

		}

	if (key_file == NULL)

		key_file = cert_file;

	if (key_file)

		{

		key = load_key(bio_err, key_file, key_format, 0, pass, e,

			       "client certificate private key file");

		if (!key)

			{

			ERR_print_errors(bio_err);

			goto end;

			}

		}

	if (cert_file)

		{

		cert = load_cert(bio_err,cert_file,cert_format,

				NULL, e, "client certificate file");

		if (!cert)

			{

			ERR_print_errors(bio_err);

			goto end;

			}

		}

	if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL

		&& !RAND_status())

		{

		BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n");

		}

	if (inrand != NULL)

		BIO_printf(bio_err,"%ld semi-random bytes loaded\n",

			app_RAND_load_files(inrand));

	if (bio_c_out == NULL)

		{

		if (c_quiet && !c_debug && !c_msg)

			{

			bio_c_out=BIO_new(BIO_s_null());

			}

		else

			{

			if (bio_c_out == NULL)

				bio_c_out=BIO_new_fp(stdout,BIO_NOCLOSE);

			}

		}

	ctx=SSL_CTX_new(meth);

	if (ctx == NULL)

		{

		ERR_print_errors(bio_err);

		goto end;

		}

	if (bugs)

		SSL_CTX_set_options(ctx,SSL_OP_ALL|off);

	else

		SSL_CTX_set_options(ctx,off);

	/* DTLS: partial reads end up discarding unread UDP bytes :-( 

	 * Setting read ahead solves this problem.

	 */

	if (sock_type == SOCK_DGRAM) SSL_CTX_set_read_ahead(ctx, 1);

	if (state) SSL_CTX_set_info_callback(ctx,apps_ssl_info_callback);

	if (cipher != NULL)

		if(!SSL_CTX_set_cipher_list(ctx,cipher)) {

		BIO_printf(bio_err,"error setting cipher list\n");

		ERR_print_errors(bio_err);

		goto end;

	}

#if 0

	else

		SSL_CTX_set_cipher_list(ctx,getenv("SSL_CIPHER"));

#endif

	SSL_CTX_set_verify(ctx,verify,verify_callback);

	if (!set_cert_key_stuff(ctx,cert,key))

		goto end;

	if ((!SSL_CTX_load_verify_locations(ctx,CAfile,CApath)) ||

		(!SSL_CTX_set_default_verify_paths(ctx)))

		{

		/* BIO_printf(bio_err,"error setting default verify locations\n"); */

		ERR_print_errors(bio_err);

		/* goto end; */

		}

	store = SSL_CTX_get_cert_store(ctx);

	X509_STORE_set_flags(store, vflags);

	con=SSL_new(ctx);

#ifndef OPENSSL_NO_KRB5

	if (con  &&  (con->kssl_ctx = kssl_ctx_new()) != NULL)

                {

                kssl_ctx_setstring(con->kssl_ctx, KSSL_SERVER, host);

		}

#endif	/* OPENSSL_NO_KRB5  */

/*	SSL_set_cipher_list(con,"RC4-MD5"); */

re_start:

	if (init_client(&s,host,port,sock_type) == 0)

		{

		BIO_printf(bio_err,"connect:errno=%d\n",get_last_socket_error());

		SHUTDOWN(s);

		goto end;

		}

	BIO_printf(bio_c_out,"CONNECTED(%08X)\n",s);

#ifdef FIONBIO

	if (c_nbio)

		{

		unsigned long l=1;

		BIO_printf(bio_c_out,"turning on non blocking io\n");

		if (BIO_socket_ioctl(s,FIONBIO,&l) < 0)

			{

			ERR_print_errors(bio_err);

			goto end;

			}

		}

#endif                                              

	if (c_Pause & 0x01) con->debug=1;

	if ( SSL_version(con) == DTLS1_VERSION)

		{

		struct timeval timeout;

		sbio=BIO_new_dgram(s,BIO_NOCLOSE);

		if (getsockname(s, &peer, (void *)&peerlen) < 0)

			{

			BIO_printf(bio_err, "getsockname:errno=%d\n",

				get_last_socket_error());

			SHUTDOWN(s);

			goto end;

			}

		BIO_ctrl_set_connected(sbio, 1, &peer);

		if ( enable_timeouts)

			{

			timeout.tv_sec = 0;

			timeout.tv_usec = DGRAM_RCV_TIMEOUT;

			BIO_ctrl(sbio, BIO_CTRL_DGRAM_SET_RECV_TIMEOUT, 0, &timeout);

			timeout.tv_sec = 0;

			timeout.tv_usec = DGRAM_SND_TIMEOUT;

			BIO_ctrl(sbio, BIO_CTRL_DGRAM_SET_SEND_TIMEOUT, 0, &timeout);

			}

		if ( mtu > 0)

			{

			SSL_set_options(con, SSL_OP_NO_QUERY_MTU);

			SSL_set_mtu(con, mtu);

			}

		else

			/* want to do MTU discovery */

			BIO_ctrl(sbio, BIO_CTRL_DGRAM_MTU_DISCOVER, 0, NULL);

		}

	else

		sbio=BIO_new_socket(s,BIO_NOCLOSE);

	if (nbio_test)

		{

		BIO *test;

		test=BIO_new(BIO_f_nbio_test());

		sbio=BIO_push(test,sbio);

		}

	if (c_debug)

		{

		con->debug=1;

		BIO_set_callback(sbio,bio_dump_callback);

		BIO_set_callback_arg(sbio,(char*)bio_c_out);

		}

	if (c_msg)

		{

		SSL_set_msg_callback(con, msg_cb);

		SSL_set_msg_callback_arg(con, bio_c_out);

		}

	SSL_set_bio(con,sbio,sbio);

	SSL_set_connect_state(con);

	/* ok, lets connect */

	width=SSL_get_fd(con)+1;

	read_tty=1;

	write_tty=0;

	tty_on=0;

	read_ssl=1;

	write_ssl=1;

	cbuf_len=0;

	cbuf_off=0;

	sbuf_len=0;

	sbuf_off=0;

	/* This is an ugly hack that does a lot of assumptions */

	if (starttls_proto == 1)

		{

		BIO_read(sbio,mbuf,BUFSIZZ);

		BIO_printf(sbio,"STARTTLS\r\n");

		BIO_read(sbio,sbuf,BUFSIZZ);

		}

	if (starttls_proto == 2)

		{

		BIO_read(sbio,mbuf,BUFSIZZ);

		BIO_printf(sbio,"STLS\r\n");

		BIO_read(sbio,sbuf,BUFSIZZ);

		}

	for (;;)

		{

		FD_ZERO(&readfds);

		FD_ZERO(&writefds);

		if (SSL_in_init(con) && !SSL_total_renegotiations(con))

			{

			in_init=1;

			tty_on=0;

			}

		else

			{

			tty_on=1;

			if (in_init)

				{

				in_init=0;

				print_stuff(bio_c_out,con,full_log);

				if (full_log > 0) full_log--;

				if (starttls_proto)

					{

					BIO_printf(bio_err,"%s",mbuf);

					/* We don't need to know any more */

					starttls_proto = 0;

					}

				if (reconnect)

					{

					reconnect--;

					BIO_printf(bio_c_out,"drop connection and then reconnect\n");

					SSL_shutdown(con);

					SSL_set_connect_state(con);

					SHUTDOWN(SSL_get_fd(con));

					goto re_start;

					}

				}

			}

		ssl_pending = read_ssl && SSL_pending(con);

		if (!ssl_pending)

			{

#if !defined(OPENSSL_SYS_WINDOWS) && !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_NETWARE)

			if (tty_on)

				{

				if (read_tty)  FD_SET(fileno(stdin),&readfds);

				if (write_tty) FD_SET(fileno(stdout),&writefds);

				}

			if (read_ssl)

				FD_SET(SSL_get_fd(con),&readfds);

			if (write_ssl)

				FD_SET(SSL_get_fd(con),&writefds);

#else

			if(!tty_on || !write_tty) {

				if (read_ssl)

					FD_SET(SSL_get_fd(con),&readfds);

				if (write_ssl)

					FD_SET(SSL_get_fd(con),&writefds);

			}

#endif

/*			printf("mode tty(%d %d%d) ssl(%d%d)\n",

				tty_on,read_tty,write_tty,read_ssl,write_ssl);*/

			/* Note: under VMS with SOCKETSHR the second parameter

			 * is currently of type (int *) whereas under other

			 * systems it is (void *) if you don't have a cast it

			 * will choke the compiler: if you do have a cast then

			 * you can either go for (int *) or (void *).

			 */

#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_MSDOS)

                        /* Under Windows/DOS we make the assumption that we can

			 * always write to the tty: therefore if we need to

			 * write to the tty we just fall through. Otherwise

			 * we timeout the select every second and see if there

			 * are any keypresses. Note: this is a hack, in a proper

			 * Windows application we wouldn't do this.

			 */

			i=0;

			if(!write_tty) {

				if(read_tty) {

					tv.tv_sec = 1;

					tv.tv_usec = 0;

					i=select(width,(void *)&readfds,(void *)&writefds,

						 NULL,&tv);

#if defined(OPENSSL_SYS_WINCE) || defined(OPENSSL_SYS_MSDOS)

					if(!i && (!_kbhit() || !read_tty) ) continue;

#else

					if(!i && (!((_kbhit()) || (WAIT_OBJECT_0 == WaitForSingleObject(GetStdHandle(STD_INPUT_HANDLE), 0))) || !read_tty) ) continue;

#endif

				} else 	i=select(width,(void *)&readfds,(void *)&writefds,

					 NULL,NULL);

			}

#elif defined(OPENSSL_SYS_NETWARE)

			if(!write_tty) {

				if(read_tty) {

					tv.tv_sec = 1;

					tv.tv_usec = 0;

					i=select(width,(void *)&readfds,(void *)&writefds,

						NULL,&tv);

				} else 	i=select(width,(void *)&readfds,(void *)&writefds,

					NULL,NULL);

			}

#else

			i=select(width,(void *)&readfds,(void *)&writefds,

				 NULL,NULL);

#endif

			if ( i < 0)

				{

				BIO_printf(bio_err,"bad select %d\n",

				get_last_socket_error());

				goto shut;

				/* goto end; */

				}

			}

		if (!ssl_pending && FD_ISSET(SSL_get_fd(con),&writefds))

			{

			k=SSL_write(con,&(cbuf[cbuf_off]),

				(unsigned int)cbuf_len);

			switch (SSL_get_error(con,k))

				{

			case SSL_ERROR_NONE:

				cbuf_off+=k;

				cbuf_len-=k;

				if (k <= 0) goto end;

				/* we have done a  write(con,NULL,0); */

				if (cbuf_len <= 0)

					{

					read_tty=1;

					write_ssl=0;

					}

				else /* if (cbuf_len > 0) */

					{

					read_tty=0;

					write_ssl=1;

					}

				break;

			case SSL_ERROR_WANT_WRITE:

				BIO_printf(bio_c_out,"write W BLOCK\n");

				write_ssl=1;

				read_tty=0;

				break;

			case SSL_ERROR_WANT_READ:

				BIO_printf(bio_c_out,"write R BLOCK\n");

				write_tty=0;

				read_ssl=1;

				write_ssl=0;

				break;

			case SSL_ERROR_WANT_X509_LOOKUP:

				BIO_printf(bio_c_out,"write X BLOCK\n");

				break;

			case SSL_ERROR_ZERO_RETURN:

				if (cbuf_len != 0)

					{

					BIO_printf(bio_c_out,"shutdown\n");

					goto shut;

					}

				else

					{

					read_tty=1;

					write_ssl=0;

					break;

					}

			case SSL_ERROR_SYSCALL:

				if ((k != 0) || (cbuf_len != 0))

					{

					BIO_printf(bio_err,"write:errno=%d\n",

						get_last_socket_error());

					goto shut;

					}

				else

					{

					read_tty=1;

					write_ssl=0;

					}

				break;

			case SSL_ERROR_SSL:

				ERR_print_errors(bio_err);

				goto shut;

				}

			}

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

		/* Assume Windows/DOS can always write */

		else if (!ssl_pending && write_tty)

#else

		else if (!ssl_pending && FD_ISSET(fileno(stdout),&writefds))

#endif

			{

#ifdef CHARSET_EBCDIC

			ascii2ebcdic(&(sbuf[sbuf_off]),&(sbuf[sbuf_off]),sbuf_len);

#endif

			i=write(fileno(stdout),&(sbuf[sbuf_off]),sbuf_len);

			if (i <= 0)

				{

				BIO_printf(bio_c_out,"DONE\n");

				goto shut;

				/* goto end; */

				}

			sbuf_len-=i;;

			sbuf_off+=i;

			if (sbuf_len <= 0)

				{

				read_ssl=1;

				write_tty=0;

				}

			}

		else if (ssl_pending || FD_ISSET(SSL_get_fd(con),&readfds))

			{

#ifdef RENEG

{ static int iiii; if (++iiii == 52) { SSL_renegotiate(con); iiii=0; } }

#endif

#if 1

			k=SSL_read(con,sbuf,1024 /* BUFSIZZ */ );

#else

/* Demo for pending and peek :-) */

			k=SSL_read(con,sbuf,16);

{ char zbuf[10240]; 

printf("read=%d pending=%d peek=%d\n",k,SSL_pending(con),SSL_peek(con,zbuf,10240));

}

#endif

			switch (SSL_get_error(con,k))

				{

			case SSL_ERROR_NONE:

				if (k <= 0)

					goto end;

				sbuf_off=0;

				sbuf_len=k;

				read_ssl=0;

				write_tty=1;

				break;

			case SSL_ERROR_WANT_WRITE:

				BIO_printf(bio_c_out,"read W BLOCK\n");

				write_ssl=1;

				read_tty=0;

				break;

			case SSL_ERROR_WANT_READ:

				BIO_printf(bio_c_out,"read R BLOCK\n");

				write_tty=0;

				read_ssl=1;

				if ((read_tty == 0) && (write_ssl == 0))

					write_ssl=1;

				break;

			case SSL_ERROR_WANT_X509_LOOKUP:

				BIO_printf(bio_c_out,"read X BLOCK\n");

				break;

			case SSL_ERROR_SYSCALL:

				BIO_printf(bio_err,"read:errno=%d\n",get_last_socket_error());