ref: 5ebb1a29d8250027e8b7f2287f3bfa3a6f3d13ac
dir: /sys/src/ape/lib/openssl/crypto/bio/bss_acpt.c/
/* crypto/bio/bss_acpt.c */
/* Copyright (C) 1995-1998 Eric Young ([email protected])
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young ([email protected]).
* 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 ([email protected]).
*
* 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 ([email protected])"
* 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 ([email protected])"
*
* 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_accept_st
{
int state;
char *param_addr;
int accept_sock;
int accept_nbio;
char *addr;
int nbio;
/* If 0, it means normal, if 1, do a connect on bind failure,
* and if there is no-one listening, bind with SO_REUSEADDR.
* If 2, always use SO_REUSEADDR. */
int bind_mode;
BIO *bio_chain;
} BIO_ACCEPT;
static int acpt_write(BIO *h, const char *buf, int num);
static int acpt_read(BIO *h, char *buf, int size);
static int acpt_puts(BIO *h, const char *str);
static long acpt_ctrl(BIO *h, int cmd, long arg1, void *arg2);
static int acpt_new(BIO *h);
static int acpt_free(BIO *data);
static int acpt_state(BIO *b, BIO_ACCEPT *c);
static void acpt_close_socket(BIO *data);
BIO_ACCEPT *BIO_ACCEPT_new(void );
void BIO_ACCEPT_free(BIO_ACCEPT *a);
#define ACPT_S_BEFORE 1
#define ACPT_S_GET_ACCEPT_SOCKET 2
#define ACPT_S_OK 3
static BIO_METHOD methods_acceptp=
{
BIO_TYPE_ACCEPT,
"socket accept",
acpt_write,
acpt_read,
acpt_puts,
NULL, /* connect_gets, */
acpt_ctrl,
acpt_new,
acpt_free,
NULL,
};
BIO_METHOD *BIO_s_accept(void)
{
return(&methods_acceptp);
}
static int acpt_new(BIO *bi)
{
BIO_ACCEPT *ba;
bi->init=0;
bi->num=INVALID_SOCKET;
bi->flags=0;
if ((ba=BIO_ACCEPT_new()) == NULL)
return(0);
bi->ptr=(char *)ba;
ba->state=ACPT_S_BEFORE;
bi->shutdown=1;
return(1);
}
BIO_ACCEPT *BIO_ACCEPT_new(void)
{
BIO_ACCEPT *ret;
if ((ret=(BIO_ACCEPT *)OPENSSL_malloc(sizeof(BIO_ACCEPT))) == NULL)
return(NULL);
memset(ret,0,sizeof(BIO_ACCEPT));
ret->accept_sock=INVALID_SOCKET;
ret->bind_mode=BIO_BIND_NORMAL;
return(ret);
}
void BIO_ACCEPT_free(BIO_ACCEPT *a)
{
if(a == NULL)
return;
if (a->param_addr != NULL) OPENSSL_free(a->param_addr);
if (a->addr != NULL) OPENSSL_free(a->addr);
if (a->bio_chain != NULL) BIO_free(a->bio_chain);
OPENSSL_free(a);
}
static void acpt_close_socket(BIO *bio)
{
BIO_ACCEPT *c;
c=(BIO_ACCEPT *)bio->ptr;
if (c->accept_sock != INVALID_SOCKET)
{
shutdown(c->accept_sock,2);
closesocket(c->accept_sock);
c->accept_sock=INVALID_SOCKET;
bio->num=INVALID_SOCKET;
}
}
static int acpt_free(BIO *a)
{
BIO_ACCEPT *data;
if (a == NULL) return(0);
data=(BIO_ACCEPT *)a->ptr;
if (a->shutdown)
{
acpt_close_socket(a);
BIO_ACCEPT_free(data);
a->ptr=NULL;
a->flags=0;
a->init=0;
}
return(1);
}
static int acpt_state(BIO *b, BIO_ACCEPT *c)
{
BIO *bio=NULL,*dbio;
int s= -1;
int i;
again:
switch (c->state)
{
case ACPT_S_BEFORE:
if (c->param_addr == NULL)
{
BIOerr(BIO_F_ACPT_STATE,BIO_R_NO_ACCEPT_PORT_SPECIFIED);
return(-1);
}
s=BIO_get_accept_socket(c->param_addr,c->bind_mode);
if (s == INVALID_SOCKET)
return(-1);
if (c->accept_nbio)
{
if (!BIO_socket_nbio(s,1))
{
closesocket(s);
BIOerr(BIO_F_ACPT_STATE,BIO_R_ERROR_SETTING_NBIO_ON_ACCEPT_SOCKET);
return(-1);
}
}
c->accept_sock=s;
b->num=s;
c->state=ACPT_S_GET_ACCEPT_SOCKET;
return(1);
/* break; */
case ACPT_S_GET_ACCEPT_SOCKET:
if (b->next_bio != NULL)
{
c->state=ACPT_S_OK;
goto again;
}
BIO_clear_retry_flags(b);
b->retry_reason=0;
i=BIO_accept(c->accept_sock,&(c->addr));
/* -2 return means we should retry */
if(i == -2)
{
BIO_set_retry_special(b);
b->retry_reason=BIO_RR_ACCEPT;
return -1;
}
if (i < 0) return(i);
bio=BIO_new_socket(i,BIO_CLOSE);
if (bio == NULL) goto err;
BIO_set_callback(bio,BIO_get_callback(b));
BIO_set_callback_arg(bio,BIO_get_callback_arg(b));
if (c->nbio)
{
if (!BIO_socket_nbio(i,1))
{
BIOerr(BIO_F_ACPT_STATE,BIO_R_ERROR_SETTING_NBIO_ON_ACCEPTED_SOCKET);
goto err;
}
}
/* If the accept BIO has an bio_chain, we dup it and
* put the new socket at the end. */
if (c->bio_chain != NULL)
{
if ((dbio=BIO_dup_chain(c->bio_chain)) == NULL)
goto err;
if (!BIO_push(dbio,bio)) goto err;
bio=dbio;
}
if (BIO_push(b,bio) == NULL) goto err;
c->state=ACPT_S_OK;
return(1);
err:
if (bio != NULL)
BIO_free(bio);
else if (s >= 0)
closesocket(s);
return(0);
/* break; */
case ACPT_S_OK:
if (b->next_bio == NULL)
{
c->state=ACPT_S_GET_ACCEPT_SOCKET;
goto again;
}
return(1);
/* break; */
default:
return(0);
/* break; */
}
}
static int acpt_read(BIO *b, char *out, int outl)
{
int ret=0;
BIO_ACCEPT *data;
BIO_clear_retry_flags(b);
data=(BIO_ACCEPT *)b->ptr;
while (b->next_bio == NULL)
{
ret=acpt_state(b,data);
if (ret <= 0) return(ret);
}
ret=BIO_read(b->next_bio,out,outl);
BIO_copy_next_retry(b);
return(ret);
}
static int acpt_write(BIO *b, const char *in, int inl)
{
int ret;
BIO_ACCEPT *data;
BIO_clear_retry_flags(b);
data=(BIO_ACCEPT *)b->ptr;
while (b->next_bio == NULL)
{
ret=acpt_state(b,data);
if (ret <= 0) return(ret);
}
ret=BIO_write(b->next_bio,in,inl);
BIO_copy_next_retry(b);
return(ret);
}
static long acpt_ctrl(BIO *b, int cmd, long num, void *ptr)
{
BIO *dbio;
int *ip;
long ret=1;
BIO_ACCEPT *data;
char **pp;
data=(BIO_ACCEPT *)b->ptr;
switch (cmd)
{
case BIO_CTRL_RESET:
ret=0;
data->state=ACPT_S_BEFORE;
acpt_close_socket(b);
b->flags=0;
break;
case BIO_C_DO_STATE_MACHINE:
/* use this one to start the connection */
ret=(long)acpt_state(b,data);
break;
case BIO_C_SET_ACCEPT:
if (ptr != NULL)
{
if (num == 0)
{
b->init=1;
if (data->param_addr != NULL)
OPENSSL_free(data->param_addr);
data->param_addr=BUF_strdup(ptr);
}
else if (num == 1)
{
data->accept_nbio=(ptr != NULL);
}
else if (num == 2)
{
if (data->bio_chain != NULL)
BIO_free(data->bio_chain);
data->bio_chain=(BIO *)ptr;
}
}
break;
case BIO_C_SET_NBIO:
data->nbio=(int)num;
break;
case BIO_C_SET_FD:
b->init=1;
b->num= *((int *)ptr);
data->accept_sock=b->num;
data->state=ACPT_S_GET_ACCEPT_SOCKET;
b->shutdown=(int)num;
b->init=1;
break;
case BIO_C_GET_FD:
if (b->init)
{
ip=(int *)ptr;
if (ip != NULL)
*ip=data->accept_sock;
ret=data->accept_sock;
}
else
ret= -1;
break;
case BIO_C_GET_ACCEPT:
if (b->init)
{
if (ptr != NULL)
{
pp=(char **)ptr;
*pp=data->param_addr;
}
else
ret= -1;
}
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_C_SET_BIND_MODE:
data->bind_mode=(int)num;
break;
case BIO_C_GET_BIND_MODE:
ret=(long)data->bind_mode;
break;
case BIO_CTRL_DUP:
dbio=(BIO *)ptr;
/* if (data->param_port) EAY EAY
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 acpt_puts(BIO *bp, const char *str)
{
int n,ret;
n=strlen(str);
ret=acpt_write(bp,str,n);
return(ret);
}
BIO *BIO_new_accept(char *str)
{
BIO *ret;
ret=BIO_new(BIO_s_accept());
if (ret == NULL) return(NULL);
if (BIO_set_accept_port(ret,str))
return(ret);
else
{
BIO_free(ret);
return(NULL);
}
}
#endif