/* crypto/bio/bss_conn.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.]

  */

 /*

  © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

  */

 #include <stdio.h>

 #include <errno.h>

 #define USE_SOCKETS

 #include "cryptlib.h"

 #include <openssl/bio.h>

 #if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))

 #include "libcrypto_wsd_macros.h"

 #include "libcrypto_wsd.h"

 #endif

 #ifndef OPENSSL_NO_SOCK

 #ifdef OPENSSL_SYS_WIN16

 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */

 #else

 #define SOCKET_PROTOCOL IPPROTO_TCP

 #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

 typedef struct bio_connect_st

 	{

 	int state;

 	char *param_hostname;

 	char *param_port;

 	int nbio;

 	unsigned char ip[4];

 	unsigned short port;

 	struct sockaddr_in them;

 	/* int socket; this will be kept in bio->num so that it is

 	 * compatible with the bss_sock bio */ 

 	/* called when the connection is initially made

 	 *  callback(BIO,state,ret);  The callback should return

 	 * 'ret'.  state is for compatibility with the ssl info_callback */

 	int (*info_callback)(const BIO *bio,int state,int ret);

 	} BIO_CONNECT;

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

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

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

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

 static int conn_new(BIO *h);

 static int conn_free(BIO *data);

 static long conn_callback_ctrl(BIO *h, int cmd, bio_info_cb *);

 static int conn_state(BIO *b, BIO_CONNECT *c);

 static void conn_close_socket(BIO *data);

 BIO_CONNECT *BIO_CONNECT_new(void );

 void BIO_CONNECT_free(BIO_CONNECT *a);

 #ifndef EMULATOR

 static BIO_METHOD methods_connectp=

 	{

 	BIO_TYPE_CONNECT,

 	"socket connect",

 	conn_write,

 	conn_read,

 	conn_puts,

 	NULL, /* connect_gets, */

 	conn_ctrl,

 	conn_new,

 	conn_free,

 	conn_callback_ctrl,

 	};

 #else

 GET_STATIC_VAR_FROM_TLS(methods_connectp,bss_conn,BIO_METHOD)

 #define methods_connectp (*GET_WSD_VAR_NAME(methods_connectp,bss_conn,s)())

 const BIO_METHOD temp_s_methods_connectp=

 	{

 	BIO_TYPE_CONNECT,

 	"socket connect",

 	conn_write,

 	conn_read,

 	conn_puts,

 	NULL, /* connect_gets, */

 	conn_ctrl,

 	conn_new,

 	conn_free,

 	conn_callback_ctrl,

 	};

 #endif		

 static int conn_state(BIO *b, BIO_CONNECT *c)

 	{

 	int ret= -1,i;

 	unsigned long l;

 	char *p,*q;

 	int (*cb)(const BIO *,int,int)=NULL;

 	if (c->info_callback != NULL)

 		cb=c->info_callback;

 	for (;;)

 		{

 		switch (c->state)

 			{

 		case BIO_CONN_S_BEFORE:

 			p=c->param_hostname;

 			if (p == NULL)

 				{

 				BIOerr(BIO_F_CONN_STATE,BIO_R_NO_HOSTNAME_SPECIFIED);

 				goto exit_loop;

 				}

 			for ( ; *p != '\0'; p++)

 				{

 				if ((*p == ':') || (*p == '/')) break;

 				}

 			i= *p;

 			if ((i == ':') || (i == '/'))

 				{

 				*(p++)='\0';

 				if (i == ':')

 					{

 					for (q=p; *q; q++)

 						if (*q == '/')

 							{

 							*q='\0';

 							break;

 							}

 					if (c->param_port != NULL)

 						OPENSSL_free(c->param_port);

 					c->param_port=BUF_strdup(p);

 					}

 				}

 			if (c->param_port == NULL)

 				{

 				BIOerr(BIO_F_CONN_STATE,BIO_R_NO_PORT_SPECIFIED);

 				ERR_add_error_data(2,"host=",c->param_hostname);

 				goto exit_loop;

 				}

 			c->state=BIO_CONN_S_GET_IP;

 			break;

 		case BIO_CONN_S_GET_IP:

 			if (BIO_get_host_ip(c->param_hostname,&(c->ip[0])) <= 0)

 				goto exit_loop;

 			c->state=BIO_CONN_S_GET_PORT;

 			break;

 		case BIO_CONN_S_GET_PORT:

 			if (c->param_port == NULL)

 				{

 				/* abort(); */

 				goto exit_loop;

 				}

 			else if (BIO_get_port(c->param_port,&c->port) <= 0)

 				goto exit_loop;

 			c->state=BIO_CONN_S_CREATE_SOCKET;

 			break;

 		case BIO_CONN_S_CREATE_SOCKET:

 			/* now setup address */

 			memset((char *)&c->them,0,sizeof(c->them));

 			c->them.sin_family=AF_INET;

 			c->them.sin_port=htons((unsigned short)c->port);

 			l=(unsigned long)

 				((unsigned long)c->ip[0]<<24L)|

 				((unsigned long)c->ip[1]<<16L)|

 				((unsigned long)c->ip[2]<< 8L)|

 				((unsigned long)c->ip[3]);

 			c->them.sin_addr.s_addr=htonl(l);

 			c->state=BIO_CONN_S_CREATE_SOCKET;

 			ret=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);

 			if (ret == INVALID_SOCKET)

 				{

 				SYSerr(SYS_F_SOCKET,get_last_socket_error());

 				ERR_add_error_data(4,"host=",c->param_hostname,

 					":",c->param_port);

 				BIOerr(BIO_F_CONN_STATE,BIO_R_UNABLE_TO_CREATE_SOCKET);

 				goto exit_loop;

 				}

 			b->num=ret;

 			c->state=BIO_CONN_S_NBIO;

 			break;

 		case BIO_CONN_S_NBIO:

 			if (c->nbio)

 				{

 				if (!BIO_socket_nbio(b->num,1))

 					{

 					BIOerr(BIO_F_CONN_STATE,BIO_R_ERROR_SETTING_NBIO);

 					ERR_add_error_data(4,"host=",

 						c->param_hostname,

 						":",c->param_port);

 					goto exit_loop;

 					}

 				}

 			c->state=BIO_CONN_S_CONNECT;

 #if defined(SO_KEEPALIVE) && !defined(OPENSSL_SYS_MPE)

 			i=1;

 			i=setsockopt(b->num,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));

 			if (i < 0)

 				{

 				SYSerr(SYS_F_SOCKET,get_last_socket_error());

 				ERR_add_error_data(4,"host=",c->param_hostname,

 					":",c->param_port);

 				BIOerr(BIO_F_CONN_STATE,BIO_R_KEEPALIVE);

 				goto exit_loop;

 				}

 #endif

 			break;

 		case BIO_CONN_S_CONNECT:

 			BIO_clear_retry_flags(b);

 			ret=connect(b->num,

 				(struct sockaddr *)&c->them,

 				sizeof(c->them));

 			b->retry_reason=0;

 			if (ret < 0)

 				{

 				if (BIO_sock_should_retry(ret))

 					{

 					BIO_set_retry_special(b);

 					c->state=BIO_CONN_S_BLOCKED_CONNECT;

 					b->retry_reason=BIO_RR_CONNECT;

 					}

 				else

 					{

 					SYSerr(SYS_F_CONNECT,get_last_socket_error());

 					ERR_add_error_data(4,"host=",

 						c->param_hostname,

 						":",c->param_port);

 					BIOerr(BIO_F_CONN_STATE,BIO_R_CONNECT_ERROR);

 					}

 				goto exit_loop;

 				}

 			else

 				c->state=BIO_CONN_S_OK;

 			break;

 		case BIO_CONN_S_BLOCKED_CONNECT:

 			i=BIO_sock_error(b->num);

 			if (i)

 				{

 				BIO_clear_retry_flags(b);

 				SYSerr(SYS_F_CONNECT,i);

 				ERR_add_error_data(4,"host=",

 					c->param_hostname,

 					":",c->param_port);

 				BIOerr(BIO_F_CONN_STATE,BIO_R_NBIO_CONNECT_ERROR);

 				ret=0;

 				goto exit_loop;

 				}

 			else

 				c->state=BIO_CONN_S_OK;

 			break;

 		case BIO_CONN_S_OK:

 			ret=1;

 			goto exit_loop;

 		default:

 			/* abort(); */

 			goto exit_loop;

 			}

 		if (cb != NULL)

 			{

 			if (!(ret=cb((BIO *)b,c->state,ret)))

 				goto end;

 			}

 		}

 	/* Loop does not exit */

 exit_loop:

 	if (cb != NULL)

 		ret=cb((BIO *)b,c->state,ret);

 end:

 	return(ret);

 	}

 EXPORT_C BIO_CONNECT *BIO_CONNECT_new(void)

 	{

 	BIO_CONNECT *ret;

 	if ((ret=(BIO_CONNECT *)OPENSSL_malloc(sizeof(BIO_CONNECT))) == NULL)

 		return(NULL);

 	ret->state=BIO_CONN_S_BEFORE;

 	ret->param_hostname=NULL;

 	ret->param_port=NULL;

 	ret->info_callback=NULL;

 	ret->nbio=0;

 	ret->ip[0]=0;

 	ret->ip[1]=0;

 	ret->ip[2]=0;

 	ret->ip[3]=0;

 	ret->port=0;

 	memset((char *)&ret->them,0,sizeof(ret->them));

 	return(ret);

 	}

 EXPORT_C void BIO_CONNECT_free(BIO_CONNECT *a)

 	{

 	if(a == NULL)

 	    return;

 	if (a->param_hostname != NULL)

 		OPENSSL_free(a->param_hostname);

 	if (a->param_port != NULL)

 		OPENSSL_free(a->param_port);

 	OPENSSL_free(a);

 	}

 EXPORT_C BIO_METHOD *BIO_s_connect(void)

 	{

 	return(&methods_connectp);

 	}

 static int conn_new(BIO *bi)

 	{

 	bi->init=0;

 	bi->num=INVALID_SOCKET;

 	bi->flags=0;

 	if ((bi->ptr=(char *)BIO_CONNECT_new()) == NULL)

 		return(0);

 	else

 		return(1);

 	}

 static void conn_close_socket(BIO *bio)

 	{

 	BIO_CONNECT *c;

 	c=(BIO_CONNECT *)bio->ptr;

 	if (bio->num != INVALID_SOCKET)

 		{

 		/* Only do a shutdown if things were established */

 		if (c->state == BIO_CONN_S_OK)

 			shutdown(bio->num,2);

 		closesocket(bio->num);

 		bio->num=INVALID_SOCKET;

 		}

 	}

 static int conn_free(BIO *a)

 	{

 	BIO_CONNECT *data;

 	if (a == NULL) return(0);

 	data=(BIO_CONNECT *)a->ptr;

 	if (a->shutdown)

 		{

 		conn_close_socket(a);

 		BIO_CONNECT_free(data);

 		a->ptr=NULL;

 		a->flags=0;

 		a->init=0;

 		}

 	return(1);

 	}

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

 	{

 	int ret=0;

 	BIO_CONNECT *data;

 	data=(BIO_CONNECT *)b->ptr;

 	if (data->state != BIO_CONN_S_OK)

 		{

 		ret=conn_state(b,data);

 		if (ret <= 0)

 				return(ret);

 		}

 	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 conn_write(BIO *b, const char *in, int inl)

 	{

 	int ret;

 	BIO_CONNECT *data;

 	data=(BIO_CONNECT *)b->ptr;

 	if (data->state != BIO_CONN_S_OK)

 		{

 		ret=conn_state(b,data);

 		if (ret <= 0) return(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 conn_ctrl(BIO *b, int cmd, long num, void *ptr)

 	{

 	BIO *dbio;

 	int *ip;

 	const char **pptr;

 	long ret=1;

 	BIO_CONNECT *data;

 	data=(BIO_CONNECT *)b->ptr;

 	switch (cmd)

 		{

 	case BIO_CTRL_RESET:

 		ret=0;

 		data->state=BIO_CONN_S_BEFORE;

 		conn_close_socket(b);

 		b->flags=0;

 		break;

 	case BIO_C_DO_STATE_MACHINE:

 		/* use this one to start the connection */

 		if (data->state != BIO_CONN_S_OK)

 		ret=(long)conn_state(b,data);

 		else

 			ret=1;

 		break;

 	case BIO_C_GET_CONNECT:

 		if (ptr != NULL)

 			{

 			pptr=(const char **)ptr;

 			if (num == 0)

 				{

 				*pptr=data->param_hostname;

 				}

 			else if (num == 1)

 				{

 				*pptr=data->param_port;

 				}

 			else if (num == 2)

 				{

 				*pptr= (char *)&(data->ip[0]);

 				}

 			else if (num == 3)

 				{

 				*((int *)ptr)=data->port;

 				}

 			if ((!b->init) || (ptr == NULL))

 				*pptr="not initialized";

 			ret=1;

 			}

 		break;

 	case BIO_C_SET_CONNECT:

 		if (ptr != NULL)

 			{

 			b->init=1;

 			if (num == 0)

 				{

 				if (data->param_hostname != NULL)

 					OPENSSL_free(data->param_hostname);

 				data->param_hostname=BUF_strdup(ptr);

 				}

 			else if (num == 1)

 				{

 				if (data->param_port != NULL)

 					OPENSSL_free(data->param_port);

 				data->param_port=BUF_strdup(ptr);

 				}

 			else if (num == 2)

 				{

 				char buf[16];

 				unsigned char *p = ptr;

 				BIO_snprintf(buf,sizeof buf,"%d.%d.%d.%d",

 					     p[0],p[1],p[2],p[3]);

 				if (data->param_hostname != NULL)

 					OPENSSL_free(data->param_hostname);

 				data->param_hostname=BUF_strdup(buf);

 				memcpy(&(data->ip[0]),ptr,4);

 				}

 			else if (num == 3)

 				{

 				char buf[DECIMAL_SIZE(int)+1];

 				BIO_snprintf(buf,sizeof buf,"%d",*(int *)ptr);

 				if (data->param_port != NULL)

 					OPENSSL_free(data->param_port);

 				data->param_port=BUF_strdup(buf);

 				data->port= *(int *)ptr;

 				}

 			}

 		break;

 	case BIO_C_SET_NBIO:

 		data->nbio=(int)num;

 		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_FLUSH:

 		break;

 	case BIO_CTRL_DUP:

 		{

 		dbio=(BIO *)ptr;

 		if (data->param_port)

 			BIO_set_conn_port(dbio,data->param_port);

 		if (data->param_hostname)

 			BIO_set_conn_hostname(dbio,data->param_hostname);

 		BIO_set_nbio(dbio,data->nbio);

 		/* FIXME: the cast of the function seems unlikely to be a good idea */

                 (void)BIO_set_info_callback(dbio,(bio_info_cb *)data->info_callback);

 		}

 		break;

 	case BIO_CTRL_SET_CALLBACK:

 		{

 #if 0 /* FIXME: Should this be used?  -- Richard Levitte */

 		BIOerr(BIO_F_CONN_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);

 		ret = -1;

 #else

 		ret=0;

 #endif

 		}

 		break;

 	case BIO_CTRL_GET_CALLBACK:

 		{

 		int (**fptr)(const BIO *bio,int state,int xret);

 		fptr=(int (**)(const BIO *bio,int state,int xret))ptr;

 		*fptr=data->info_callback;

 		}

 		break;

 	default:

 		ret=0;

 		break;

 		}

 	return(ret);

 	}

 static long conn_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)

 	{

 	long ret=1;

 	BIO_CONNECT *data;

 	data=(BIO_CONNECT *)b->ptr;

 	switch (cmd)

 		{

 	case BIO_CTRL_SET_CALLBACK:

 		{

 		data->info_callback=(int (*)(const struct bio_st *, int, int))fp;

 		}

 		break;

 	default:

 		ret=0;

 		break;

 		}

 	return(ret);

 	}

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

 	{

 	int n,ret;

 	n=strlen(str);

 	ret=conn_write(bp,str,n);

 	return(ret);

 	}

 EXPORT_C BIO *BIO_new_connect(char *str)

 	{

 	BIO *ret;

 	ret=BIO_new(BIO_s_connect());

 	if (ret == NULL) return(NULL);

 	if (BIO_set_conn_hostname(ret,str))

 		return(ret);

 	else

 		{

 		BIO_free(ret);

 		return(NULL);

 		}

 	}

 #endif