openssl/crypto/bio/bss_conn.c

/* crypto/bio/bss_conn.c */
/* Copyright (C) 1995-1997 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.]
 */

#ifndef NO_SOCK

#include <stdio.h>
#include <errno.h>
#define USE_SOCKETS
#include "cryptlib.h"
#include "bio.h"

/*	BIOerr(BIO_F_WSASTARTUP,BIO_R_WSASTARTUP ); */

#ifdef WIN16
#define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
#else
#define SOCKET_PROTOCOL IPPROTO_TCP
#endif

typedef struct bio_connect_st
	{
	int state;

	char *param_hostname;
	char *param_port;
	int nbio;

	unsigned char ip[4];
	short port;

	struct sockaddr_in them;

	/* int socket; this will be kept in bio->num so that it is
	 * compatable with the bss_sock bio */ 
	int error;
	} BIO_CONNECT;

#ifndef NOPROTO
static int conn_write(BIO *h,char *buf,int num);
static int conn_read(BIO *h,char *buf,int size);
static int conn_puts(BIO *h,char *str);
static long conn_ctrl(BIO *h,int cmd,long arg1,char *arg2);
static int conn_new(BIO *h);
static int conn_free(BIO *data);
#else
static int conn_write();
static int conn_read();
static int conn_puts();
static long conn_ctrl();
static int conn_new();
static int conn_free();
#endif

#ifndef NOPROTO

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);

#else

static int conn_state();
static void conn_close_socket();
BIO_CONNECT *BIO_CONNECT_new();
void BIO_CONNECT_free();

#endif

#define CONN_S_BEFORE		1
#define CONN_S_GET_IP		2
#define CONN_S_GET_PORT		3
#define CONN_S_CREATE_SOCKET	4
#define CONN_S_CONNECT		5
#define CONN_S_OK		6
#define CONN_S_BLOCKED_CONNECT	7
#define CONN_S_NBIO		8

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,
	};

static int conn_state(b,c)
BIO *b;
BIO_CONNECT *c;
	{
	int ret= -1,i;
	unsigned long l;
	char *p,*q;

	switch (c->state)
		{
	case CONN_S_BEFORE:
		p=c->param_hostname;
		if (p == NULL)
			{
			BIOerr(BIO_F_CONN_STATE,BIO_R_NO_HOSTHNAME_SPECIFIED);
			break;
			}
		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)
					Free(c->param_port);
				c->param_port=BUF_strdup(p);
				}
			}

		if (p == NULL)
			{
			BIOerr(BIO_F_CONN_STATE,BIO_R_NO_PORT_SPECIFIED);
			break;
			}
		c->state=CONN_S_GET_IP;

	case CONN_S_GET_IP:
		if (BIO_get_host_ip(c->param_hostname,&(c->ip[0])) <= 0)
			break;
		c->state=CONN_S_GET_PORT;

	case CONN_S_GET_PORT:
		if (BIO_get_port(c->param_port,&c->port) <= 0)
			break;
		c->state=CONN_S_CREATE_SOCKET;

	case 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=CONN_S_CREATE_SOCKET;

		ret=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
		if (ret == INVALID_SOCKET)
			{
			SYSerr(SYS_F_SOCKET,errno);
			BIOerr(BIO_F_CONN_STATE,BIO_R_UNABLE_TO_CREATE_SOCKET);
			break;
			}
		b->num=ret;
		c->state=CONN_S_NBIO;

	case CONN_S_NBIO:
#ifdef FIONBIO
		if (c->nbio)
			{
			l=1;
			ret=BIO_socket_ioctl(b->num,FIONBIO,&l);
			if (ret < 0)
				{
				BIOerr(BIO_F_CONN_STATE,BIO_R_ERROR_SETTING_NBIO);
				break;
				}
			}
#endif
		c->state=CONN_S_CONNECT;

	case 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=CONN_S_BLOCKED_CONNECT;
				b->retry_reason=BIO_RR_CONNECT;
				}
			else
				{
				SYSerr(SYS_F_CONNECT,errno);
				BIOerr(BIO_F_CONN_STATE,BIO_R_CONNECT_ERROR);
				}
			}
		else
			{
			ret=1;
			c->state=CONN_S_OK;
			}
		break;

	case CONN_S_BLOCKED_CONNECT:
		BIO_clear_retry_flags(b);
		i=BIO_sock_error(b->num);
		if (i)
			{
			SYSerr(SYS_F_CONNECT,i);
			BIOerr(BIO_F_CONN_STATE,BIO_R_NBIO_CONNECT_ERROR);
			}
		else
			{
			c->state=CONN_S_OK;
			ret=1;
			}
		break;

	case CONN_S_OK:
		ret=1;
		break;
	default:
		abort();
		}
	return(ret);
	}

BIO_CONNECT *BIO_CONNECT_new()
	{
	BIO_CONNECT *ret;

	if ((ret=(BIO_CONNECT *)Malloc(sizeof(BIO_CONNECT))) == NULL)
		return(NULL);
	ret->state=CONN_S_BEFORE;
	ret->param_hostname=NULL;
	ret->param_port=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));
	ret->error=0;
	return(ret);
	}

void BIO_CONNECT_free(a)
BIO_CONNECT *a;
	{
	if (a->param_hostname != NULL)
		Free(a->param_hostname);
	if (a->param_port != NULL)
		Free(a->param_port);
	Free(a);
	}

BIO_METHOD *BIO_s_connect()
	{
	return(&methods_connectp);
	}

static int conn_new(bi)
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;
	{
	BIO_CONNECT *c;

	c=(BIO_CONNECT *)bio->ptr;
	if (bio->num != INVALID_SOCKET)
		{
		/* Only do a shutdown if things were established */
		if (c->state == CONN_S_OK)
			shutdown(bio->num,2);
# ifdef WINDOWS
		closesocket(bio->num);
# else
		close(bio->num);
# endif
		bio->num=INVALID_SOCKET;
		}
	}

static int conn_free(a)
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(b,out,outl)
BIO *b;
char *out;
int outl;
	{
	int ret=0;
	BIO_CONNECT *data;

	data=(BIO_CONNECT *)b->ptr;
	if (data->state != CONN_S_OK)
		{
		ret=conn_state(b,data);
		if (ret <= 0) return(ret);
		}

	if (out != NULL)
		{
		errno=0;
#if defined(WINDOWS)
		ret=recv(b->num,out,outl,0);
#else
		ret=read(b->num,out,outl);
#endif
		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(b,in,inl)
BIO *b;
char *in;
int inl;
	{
	int ret;
	BIO_CONNECT *data;

	data=(BIO_CONNECT *)b->ptr;
	if (data->state != CONN_S_OK)
		{
		ret=conn_state(b,data);
		if (ret <= 0) return(ret);
		}

	errno=0;
#if defined(WINDOWS)
	ret=send(b->num,in,inl,0);
#else
	ret=write(b->num,in,inl);
#endif
	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(b,cmd,num,ptr)
BIO *b;
int cmd;
long num;
char *ptr;
	{
	BIO *dbio;
	int *ip;
	long ret=1;
	BIO_CONNECT *data;

	data=(BIO_CONNECT *)b->ptr;

	switch (cmd)
		{
	case BIO_CTRL_RESET:
		ret=0;
		data->state=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 != CONN_S_OK)
			ret=(long)conn_state(b,data);
		else
			ret=1;
		break;
	case BIO_C_SET_CONNECT:
		if (ptr != NULL)
			{
			b->init=1;
			if (num == 0)
				{
				if (data->param_hostname != NULL)
					Free(data->param_hostname);
				data->param_hostname=BUF_strdup(ptr);
				}
			else if (num == 1)
				{
				if (data->param_port != NULL)
					Free(data->param_port);
				data->param_port=BUF_strdup(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_port(dbio,data->param_port);
		if (data->param_hostname)
			BIO_set_hostname(dbio,data->param_hostname);
		BIO_set_nbio(dbio,data->nbio);
		break;

	default:
		ret=0;
		break;
		}
	return(ret);
	}

static int conn_puts(bp,str)
BIO *bp;
char *str;
	{
	int n,ret;

	n=strlen(str);
	ret=conn_write(bp,str,n);
	return(ret);
	}

BIO *BIO_new_connect(str)
char *str;
	{
	BIO *ret;

	ret=BIO_new(BIO_s_connect());
	if (ret == NULL) return(NULL);
	if (BIO_set_hostname(ret,str))
		return(ret);
	else
		{
		BIO_free(ret);
		return(NULL);
		}
	}

#endif