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openssl/crypto/bio/bss_conn.c

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/* 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
#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);
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
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