openssl1.0/crypto/bio/bss_rtcp.c

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/* crypto/bio/bss_rtcp.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.]
*/
/*-
* Written by David L. Jones <jonesd@kcgl1.eng.ohio-state.edu>
* 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$_ definitions */
#include <starlet.h>
typedef unsigned short io_channel;
/*************************************************************************/
struct io_status {
short status, count;
long flags;
};
/* Should have member alignment inhibited */
struct rpc_msg {
/* 'A'-app data. 'R'-remote client 'G'-global */
char channel;
/* 'G'-get, 'P'-put, 'C'-confirm, 'X'-close */
char function;
/* Amount of data returned or max to return */
unsigned short int length;
/* variable data */
char data[4092];
};
#define RPC_HDR_SIZE (sizeof(struct rpc_msg) - 4092)
struct rpc_ctx {
int filled, pos;
struct rpc_msg msg;
};
static int rtcp_write(BIO *h, const char *buf, int num);
static int rtcp_read(BIO *h, char *buf, int size);
static int rtcp_puts(BIO *h, const char *str);
static int rtcp_gets(BIO *h, char *str, int size);
static long rtcp_ctrl(BIO *h, int cmd, long arg1, void *arg2);
static int rtcp_new(BIO *h);
static int rtcp_free(BIO *data);
static BIO_METHOD rtcp_method = {
BIO_TYPE_FD,
"RTCP",
rtcp_write,
rtcp_read,
rtcp_puts,
rtcp_gets,
rtcp_ctrl,
rtcp_new,
rtcp_free,
NULL,
};
BIO_METHOD *BIO_s_rtcp(void)
{
return (&rtcp_method);
}
/*****************************************************************************/
/*
* Decnet I/O routines.
*/
#ifdef __DECC
# pragma message save
# pragma message disable DOLLARID
#endif
static int get(io_channel chan, char *buffer, int maxlen, int *length)
{
int status;
struct io_status iosb;
status = sys$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));
if (bi->ptr == NULL)
return (0);
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);
}