/* 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.] */#include <stdio.h>#include <errno.h>#define USE_SOCKETS#include "cryptlib.h"#include <openssl/bio.h>#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#endiftypedef 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);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,	};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);	}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);	}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);	}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);	}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