sl@0: /* crypto/bio/bss_rtcp.c */
sl@0: /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * This package is an SSL implementation written
sl@0:  * by Eric Young (eay@cryptsoft.com).
sl@0:  * The implementation was written so as to conform with Netscapes SSL.
sl@0:  * 
sl@0:  * This library is free for commercial and non-commercial use as long as
sl@0:  * the following conditions are aheared to.  The following conditions
sl@0:  * apply to all code found in this distribution, be it the RC4, RSA,
sl@0:  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
sl@0:  * included with this distribution is covered by the same copyright terms
sl@0:  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
sl@0:  * 
sl@0:  * Copyright remains Eric Young's, and as such any Copyright notices in
sl@0:  * the code are not to be removed.
sl@0:  * If this package is used in a product, Eric Young should be given attribution
sl@0:  * as the author of the parts of the library used.
sl@0:  * This can be in the form of a textual message at program startup or
sl@0:  * in documentation (online or textual) provided with the package.
sl@0:  * 
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  * 1. Redistributions of source code must retain the copyright
sl@0:  *    notice, this list of conditions and the following disclaimer.
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in the
sl@0:  *    documentation and/or other materials provided with the distribution.
sl@0:  * 3. All advertising materials mentioning features or use of this software
sl@0:  *    must display the following acknowledgement:
sl@0:  *    "This product includes cryptographic software written by
sl@0:  *     Eric Young (eay@cryptsoft.com)"
sl@0:  *    The word 'cryptographic' can be left out if the rouines from the library
sl@0:  *    being used are not cryptographic related :-).
sl@0:  * 4. If you include any Windows specific code (or a derivative thereof) from 
sl@0:  *    the apps directory (application code) you must include an acknowledgement:
sl@0:  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
sl@0:  * 
sl@0:  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
sl@0:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
sl@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
sl@0:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
sl@0:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
sl@0:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
sl@0:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
sl@0:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
sl@0:  * SUCH DAMAGE.
sl@0:  * 
sl@0:  * The licence and distribution terms for any publically available version or
sl@0:  * derivative of this code cannot be changed.  i.e. this code cannot simply be
sl@0:  * copied and put under another distribution licence
sl@0:  * [including the GNU Public Licence.]
sl@0:  */
sl@0: 
sl@0: /* Written by David L. Jones <jonesd@kcgl1.eng.ohio-state.edu>
sl@0:  * Date:   22-JUL-1996
sl@0:  * Revised: 25-SEP-1997		Update for 0.8.1, BIO_CTRL_SET -> BIO_C_SET_FD
sl@0:  */
sl@0: /* VMS */
sl@0: #include <stdio.h>
sl@0: #include <stdlib.h>
sl@0: #include <string.h>
sl@0: #include <errno.h>
sl@0: #include "cryptlib.h"
sl@0: #include <openssl/bio.h>
sl@0: 
sl@0: #include <iodef.h>		/* VMS IO$_ definitions */
sl@0: #include <starlet.h>
sl@0: 
sl@0: typedef unsigned short io_channel;
sl@0: /*************************************************************************/
sl@0: struct io_status { short status, count; long flags; };
sl@0: 
sl@0: struct rpc_msg {		/* Should have member alignment inhibited */
sl@0:    char channel;		/* 'A'-app data. 'R'-remote client 'G'-global */
sl@0:    char function;		/* 'G'-get, 'P'-put, 'C'-confirm, 'X'-close */
sl@0:    unsigned short int length;	/* Amount of data returned or max to return */
sl@0:    char data[4092];		/* variable data */
sl@0: };
sl@0: #define RPC_HDR_SIZE (sizeof(struct rpc_msg) - 4092)
sl@0: 
sl@0: struct rpc_ctx {
sl@0:     int filled, pos;
sl@0:     struct rpc_msg msg;
sl@0: };
sl@0: 
sl@0: static int rtcp_write(BIO *h,const char *buf,int num);
sl@0: static int rtcp_read(BIO *h,char *buf,int size);
sl@0: static int rtcp_puts(BIO *h,const char *str);
sl@0: static int rtcp_gets(BIO *h,char *str,int size);
sl@0: static long rtcp_ctrl(BIO *h,int cmd,long arg1,void *arg2);
sl@0: static int rtcp_new(BIO *h);
sl@0: static int rtcp_free(BIO *data);
sl@0: 
sl@0: static BIO_METHOD rtcp_method=
sl@0: 	{
sl@0: 	BIO_TYPE_FD,
sl@0: 	"RTCP",
sl@0: 	rtcp_write,
sl@0: 	rtcp_read,
sl@0: 	rtcp_puts,
sl@0: 	rtcp_gets,
sl@0: 	rtcp_ctrl,
sl@0: 	rtcp_new,
sl@0: 	rtcp_free,
sl@0: 	NULL,
sl@0: 	};
sl@0: 
sl@0: BIO_METHOD *BIO_s_rtcp(void)
sl@0: 	{
sl@0: 	return(&rtcp_method);
sl@0: 	}
sl@0: /*****************************************************************************/
sl@0: /* Decnet I/O routines.
sl@0:  */
sl@0: 
sl@0: #ifdef __DECC
sl@0: #pragma message save
sl@0: #pragma message disable DOLLARID
sl@0: #endif
sl@0: 
sl@0: static int get ( io_channel chan, char *buffer, int maxlen, int *length )
sl@0: {
sl@0:     int status;
sl@0:     struct io_status iosb;
sl@0:     status = sys$qiow ( 0, chan, IO$_READVBLK, &iosb, 0, 0,
sl@0: 	buffer, maxlen, 0, 0, 0, 0 );
sl@0:     if ( (status&1) == 1 ) status = iosb.status;
sl@0:     if ( (status&1) == 1 ) *length = iosb.count;
sl@0:     return status;
sl@0: }
sl@0: 
sl@0: static int put ( io_channel chan, char *buffer, int length )
sl@0: {
sl@0:     int status;
sl@0:     struct io_status iosb;
sl@0:     status = sys$qiow ( 0, chan, IO$_WRITEVBLK, &iosb, 0, 0,
sl@0: 	buffer, length, 0, 0, 0, 0 );
sl@0:     if ( (status&1) == 1 ) status = iosb.status;
sl@0:     return status;
sl@0: }
sl@0: 
sl@0: #ifdef __DECC
sl@0: #pragma message restore
sl@0: #endif
sl@0: 
sl@0: /***************************************************************************/
sl@0: 
sl@0: static int rtcp_new(BIO *bi)
sl@0: {
sl@0:     struct rpc_ctx *ctx;
sl@0: 	bi->init=1;
sl@0: 	bi->num=0;
sl@0: 	bi->flags = 0;
sl@0: 	bi->ptr=OPENSSL_malloc(sizeof(struct rpc_ctx));
sl@0: 	ctx = (struct rpc_ctx *) bi->ptr;
sl@0: 	ctx->filled = 0;
sl@0: 	ctx->pos = 0;
sl@0: 	return(1);
sl@0: }
sl@0: 
sl@0: static int rtcp_free(BIO *a)
sl@0: {
sl@0: 	if (a == NULL) return(0);
sl@0: 	if ( a->ptr ) OPENSSL_free ( a->ptr );
sl@0: 	a->ptr = NULL;
sl@0: 	return(1);
sl@0: }
sl@0: 	
sl@0: static int rtcp_read(BIO *b, char *out, int outl)
sl@0: {
sl@0:     int status, length;
sl@0:     struct rpc_ctx *ctx;
sl@0:     /*
sl@0:      * read data, return existing.
sl@0:      */
sl@0:     ctx = (struct rpc_ctx *) b->ptr;
sl@0:     if ( ctx->pos < ctx->filled ) {
sl@0: 	length = ctx->filled - ctx->pos;
sl@0: 	if ( length > outl ) length = outl;
sl@0: 	memmove ( out, &ctx->msg.data[ctx->pos], length );
sl@0: 	ctx->pos += length;
sl@0: 	return length;
sl@0:     }
sl@0:     /*
sl@0:      * Requst more data from R channel.
sl@0:      */
sl@0:     ctx->msg.channel = 'R';
sl@0:     ctx->msg.function = 'G';
sl@0:     ctx->msg.length = sizeof(ctx->msg.data);
sl@0:     status = put ( b->num, (char *) &ctx->msg, RPC_HDR_SIZE );
sl@0:     if ( (status&1) == 0 ) {
sl@0: 	return -1;
sl@0:     }
sl@0:     /*
sl@0:      * Read.
sl@0:      */
sl@0:     ctx->pos = ctx->filled = 0;
sl@0:     status = get ( b->num, (char *) &ctx->msg, sizeof(ctx->msg), &length );
sl@0:     if ( (status&1) == 0 ) length = -1;
sl@0:     if ( ctx->msg.channel != 'R' || ctx->msg.function != 'C' ) {
sl@0: 	length = -1;
sl@0:     }
sl@0:     ctx->filled = length - RPC_HDR_SIZE;
sl@0:     
sl@0:     if ( ctx->pos < ctx->filled ) {
sl@0: 	length = ctx->filled - ctx->pos;
sl@0: 	if ( length > outl ) length = outl;
sl@0: 	memmove ( out, ctx->msg.data, length );
sl@0: 	ctx->pos += length;
sl@0: 	return length;
sl@0:     }
sl@0: 
sl@0:     return length;
sl@0: }
sl@0: 
sl@0: static int rtcp_write(BIO *b, const char *in, int inl)
sl@0: {
sl@0:     int status, i, segment, length;
sl@0:     struct rpc_ctx *ctx;
sl@0:     /*
sl@0:      * Output data, send in chunks no larger that sizeof(ctx->msg.data).
sl@0:      */
sl@0:     ctx = (struct rpc_ctx *) b->ptr;
sl@0:     for ( i = 0; i < inl; i += segment ) {
sl@0: 	segment = inl - i;
sl@0: 	if ( segment > sizeof(ctx->msg.data) ) segment = sizeof(ctx->msg.data);
sl@0: 	ctx->msg.channel = 'R';
sl@0: 	ctx->msg.function = 'P';
sl@0: 	ctx->msg.length = segment;
sl@0: 	memmove ( ctx->msg.data, &in[i], segment );
sl@0: 	status = put ( b->num, (char *) &ctx->msg, segment + RPC_HDR_SIZE );
sl@0: 	if ((status&1) == 0 ) { i = -1; break; }
sl@0: 
sl@0: 	status = get ( b->num, (char *) &ctx->msg, sizeof(ctx->msg), &length );
sl@0: 	if ( ((status&1) == 0) || (length < RPC_HDR_SIZE) ) { i = -1; break; }
sl@0: 	if ( (ctx->msg.channel != 'R') || (ctx->msg.function != 'C') ) {
sl@0: 	   printf("unexpected response when confirming put %c %c\n",
sl@0: 		ctx->msg.channel, ctx->msg.function );
sl@0: 
sl@0: 	}
sl@0:     }
sl@0:     return(i);
sl@0: }
sl@0: 
sl@0: static long rtcp_ctrl(BIO *b, int cmd, long num, void *ptr)
sl@0: 	{
sl@0: 	long ret=1;
sl@0: 
sl@0: 	switch (cmd)
sl@0: 		{
sl@0: 	case BIO_CTRL_RESET:
sl@0: 	case BIO_CTRL_EOF:
sl@0: 		ret = 1;
sl@0: 		break;
sl@0: 	case BIO_C_SET_FD:
sl@0: 		b->num = num;
sl@0: 		ret = 1;
sl@0: 	 	break;
sl@0: 	case BIO_CTRL_SET_CLOSE:
sl@0: 	case BIO_CTRL_FLUSH:
sl@0: 	case BIO_CTRL_DUP:
sl@0: 		ret=1;
sl@0: 		break;
sl@0: 	case BIO_CTRL_GET_CLOSE:
sl@0: 	case BIO_CTRL_INFO:
sl@0: 	case BIO_CTRL_GET:
sl@0: 	case BIO_CTRL_PENDING:
sl@0: 	case BIO_CTRL_WPENDING:
sl@0: 	default:
sl@0: 		ret=0;
sl@0: 		break;
sl@0: 		}
sl@0: 	return(ret);
sl@0: 	}
sl@0: 
sl@0: static int rtcp_gets(BIO *bp, char *buf, int size)
sl@0: 	{
sl@0: 	return(0);
sl@0: 	}
sl@0: 
sl@0: static int rtcp_puts(BIO *bp, const char *str)
sl@0: {
sl@0:     int length;
sl@0:     if (str == NULL) return(0);
sl@0:     length = strlen ( str );
sl@0:     if ( length == 0 ) return (0);
sl@0:     return rtcp_write ( bp,str, length );
sl@0: }
sl@0: