ref: 7be7d0681f567e97fd37f937c2e5e486d6d74eab
dir: /sys/src/ape/lib/openssl/crypto/bio/bss_rtcp.c/
/* crypto/bio/bss_rtcp.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.]
*/
/* Written by David L. Jones <[email protected]>
* Date: 22-JUL-1996
* Revised: 25-SEP-1997 Update for 0.8.1, BIO_CTRL_SET -> BIO_C_SET_FD
*/
/* VMS */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "cryptlib.h"
#include <openssl/bio.h>
#include <iodef.h> /* VMS IO$_ definitions */
#include <starlet.h>
typedef unsigned short io_channel;
/*************************************************************************/
struct io_status { short status, count; long flags; };
struct rpc_msg { /* Should have member alignment inhibited */
char channel; /* 'A'-app data. 'R'-remote client 'G'-global */
char function; /* 'G'-get, 'P'-put, 'C'-confirm, 'X'-close */
unsigned short int length; /* Amount of data returned or max to return */
char data[4092]; /* variable data */
};
#define RPC_HDR_SIZE (sizeof(struct rpc_msg) - 4092)
struct rpc_ctx {
int filled, pos;
struct rpc_msg msg;
};
static int rtcp_write(BIO *h,const char *buf,int num);
static int rtcp_read(BIO *h,char *buf,int size);
static int rtcp_puts(BIO *h,const char *str);
static int rtcp_gets(BIO *h,char *str,int size);
static long rtcp_ctrl(BIO *h,int cmd,long arg1,void *arg2);
static int rtcp_new(BIO *h);
static int rtcp_free(BIO *data);
static BIO_METHOD rtcp_method=
{
BIO_TYPE_FD,
"RTCP",
rtcp_write,
rtcp_read,
rtcp_puts,
rtcp_gets,
rtcp_ctrl,
rtcp_new,
rtcp_free,
NULL,
};
BIO_METHOD *BIO_s_rtcp(void)
{
return(&rtcp_method);
}
/*****************************************************************************/
/* Decnet I/O routines.
*/
#ifdef __DECC
#pragma message save
#pragma message disable DOLLARID
#endif
static int get ( io_channel chan, char *buffer, int maxlen, int *length )
{
int status;
struct io_status iosb;
status = sys$qiow ( 0, chan, IO$_READVBLK, &iosb, 0, 0,
buffer, maxlen, 0, 0, 0, 0 );
if ( (status&1) == 1 ) status = iosb.status;
if ( (status&1) == 1 ) *length = iosb.count;
return status;
}
static int put ( io_channel chan, char *buffer, int length )
{
int status;
struct io_status iosb;
status = sys$qiow ( 0, chan, IO$_WRITEVBLK, &iosb, 0, 0,
buffer, length, 0, 0, 0, 0 );
if ( (status&1) == 1 ) status = iosb.status;
return status;
}
#ifdef __DECC
#pragma message restore
#endif
/***************************************************************************/
static int rtcp_new(BIO *bi)
{
struct rpc_ctx *ctx;
bi->init=1;
bi->num=0;
bi->flags = 0;
bi->ptr=OPENSSL_malloc(sizeof(struct rpc_ctx));
ctx = (struct rpc_ctx *) bi->ptr;
ctx->filled = 0;
ctx->pos = 0;
return(1);
}
static int rtcp_free(BIO *a)
{
if (a == NULL) return(0);
if ( a->ptr ) OPENSSL_free ( a->ptr );
a->ptr = NULL;
return(1);
}
static int rtcp_read(BIO *b, char *out, int outl)
{
int status, length;
struct rpc_ctx *ctx;
/*
* read data, return existing.
*/
ctx = (struct rpc_ctx *) b->ptr;
if ( ctx->pos < ctx->filled ) {
length = ctx->filled - ctx->pos;
if ( length > outl ) length = outl;
memmove ( out, &ctx->msg.data[ctx->pos], length );
ctx->pos += length;
return length;
}
/*
* Requst more data from R channel.
*/
ctx->msg.channel = 'R';
ctx->msg.function = 'G';
ctx->msg.length = sizeof(ctx->msg.data);
status = put ( b->num, (char *) &ctx->msg, RPC_HDR_SIZE );
if ( (status&1) == 0 ) {
return -1;
}
/*
* Read.
*/
ctx->pos = ctx->filled = 0;
status = get ( b->num, (char *) &ctx->msg, sizeof(ctx->msg), &length );
if ( (status&1) == 0 ) length = -1;
if ( ctx->msg.channel != 'R' || ctx->msg.function != 'C' ) {
length = -1;
}
ctx->filled = length - RPC_HDR_SIZE;
if ( ctx->pos < ctx->filled ) {
length = ctx->filled - ctx->pos;
if ( length > outl ) length = outl;
memmove ( out, ctx->msg.data, length );
ctx->pos += length;
return length;
}
return length;
}
static int rtcp_write(BIO *b, const char *in, int inl)
{
int status, i, segment, length;
struct rpc_ctx *ctx;
/*
* Output data, send in chunks no larger that sizeof(ctx->msg.data).
*/
ctx = (struct rpc_ctx *) b->ptr;
for ( i = 0; i < inl; i += segment ) {
segment = inl - i;
if ( segment > sizeof(ctx->msg.data) ) segment = sizeof(ctx->msg.data);
ctx->msg.channel = 'R';
ctx->msg.function = 'P';
ctx->msg.length = segment;
memmove ( ctx->msg.data, &in[i], segment );
status = put ( b->num, (char *) &ctx->msg, segment + RPC_HDR_SIZE );
if ((status&1) == 0 ) { i = -1; break; }
status = get ( b->num, (char *) &ctx->msg, sizeof(ctx->msg), &length );
if ( ((status&1) == 0) || (length < RPC_HDR_SIZE) ) { i = -1; break; }
if ( (ctx->msg.channel != 'R') || (ctx->msg.function != 'C') ) {
printf("unexpected response when confirming put %c %c\n",
ctx->msg.channel, ctx->msg.function );
}
}
return(i);
}
static long rtcp_ctrl(BIO *b, int cmd, long num, void *ptr)
{
long ret=1;
switch (cmd)
{
case BIO_CTRL_RESET:
case BIO_CTRL_EOF:
ret = 1;
break;
case BIO_C_SET_FD:
b->num = num;
ret = 1;
break;
case BIO_CTRL_SET_CLOSE:
case BIO_CTRL_FLUSH:
case BIO_CTRL_DUP:
ret=1;
break;
case BIO_CTRL_GET_CLOSE:
case BIO_CTRL_INFO:
case BIO_CTRL_GET:
case BIO_CTRL_PENDING:
case BIO_CTRL_WPENDING:
default:
ret=0;
break;
}
return(ret);
}
static int rtcp_gets(BIO *bp, char *buf, int size)
{
return(0);
}
static int rtcp_puts(BIO *bp, const char *str)
{
int length;
if (str == NULL) return(0);
length = strlen ( str );
if ( length == 0 ) return (0);
return rtcp_write ( bp,str, length );
}