d3442bc780
designed for that. This removes the potential error to mix data and function pointers. Please note that I'm a little unsure how incorrect calls to the old ctrl functions should be handled, in som cases. I currently return 0 and that's it, but it may be more correct to generate a genuine error in those cases.
294 lines
8.6 KiB
C
294 lines
8.6 KiB
C
/* crypto/bio/bss_rtcp.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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/* Written by David L. Jones <jonesd@kcgl1.eng.ohio-state.edu>
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* Date: 22-JUL-1996
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* Revised: 25-SEP-1997 Update for 0.8.1, BIO_CTRL_SET -> BIO_C_SET_FD
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*/
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/* VMS */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include "cryptlib.h"
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#include <openssl/bio.h>
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#include <iodef.h> /* VMS IO$_ definitions */
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#include <starlet.h>
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typedef unsigned short io_channel;
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/*************************************************************************/
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struct io_status { short status, count; long flags; };
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struct rpc_msg { /* Should have member alignment inhibited */
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char channel; /* 'A'-app data. 'R'-remote client 'G'-global */
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char function; /* 'G'-get, 'P'-put, 'C'-confirm, 'X'-close */
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unsigned short int length; /* Amount of data returned or max to return */
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char data[4092]; /* variable data */
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};
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#define RPC_HDR_SIZE (sizeof(struct rpc_msg) - 4092)
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struct rpc_ctx {
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int filled, pos;
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struct rpc_msg msg;
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};
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static int rtcp_write(BIO *h,char *buf,int num);
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static int rtcp_read(BIO *h,char *buf,int size);
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static int rtcp_puts(BIO *h,char *str);
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static int rtcp_gets(BIO *h,char *str,int size);
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static long rtcp_ctrl(BIO *h,int cmd,long arg1,char *arg2);
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static int rtcp_new(BIO *h);
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static int rtcp_free(BIO *data);
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static BIO_METHOD rtcp_method=
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{
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BIO_TYPE_FD,
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"RTCP",
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rtcp_write,
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rtcp_read,
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rtcp_puts,
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rtcp_gets,
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rtcp_ctrl,
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rtcp_new,
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rtcp_free,
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NULL,
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};
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BIO_METHOD *BIO_s_rtcp(void)
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{
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return(&rtcp_method);
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}
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/*****************************************************************************/
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/* Decnet I/O routines.
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*/
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#ifdef __DECC
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#pragma message save
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#pragma message disable DOLLARID
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#endif
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static int get ( io_channel chan, char *buffer, int maxlen, int *length )
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{
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int status;
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struct io_status iosb;
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status = sys$qiow ( 0, chan, IO$_READVBLK, &iosb, 0, 0,
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buffer, maxlen, 0, 0, 0, 0 );
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if ( (status&1) == 1 ) status = iosb.status;
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if ( (status&1) == 1 ) *length = iosb.count;
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return status;
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}
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static int put ( io_channel chan, char *buffer, int length )
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{
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int status;
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struct io_status iosb;
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status = sys$qiow ( 0, chan, IO$_WRITEVBLK, &iosb, 0, 0,
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buffer, length, 0, 0, 0, 0 );
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if ( (status&1) == 1 ) status = iosb.status;
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return status;
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}
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#ifdef __DECC
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#pragma message restore
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#endif
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/***************************************************************************/
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static int rtcp_new(BIO *bi)
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{
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struct rpc_ctx *ctx;
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bi->init=1;
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bi->num=0;
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bi->flags = 0;
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bi->ptr=Malloc(sizeof(struct rpc_ctx));
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ctx = (struct rpc_ctx *) bi->ptr;
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ctx->filled = 0;
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ctx->pos = 0;
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return(1);
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}
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static int rtcp_free(BIO *a)
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{
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if (a == NULL) return(0);
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if ( a->ptr ) Free ( a->ptr );
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a->ptr = NULL;
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return(1);
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}
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static int rtcp_read(BIO *b, char *out, int outl)
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{
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int status, length;
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struct rpc_ctx *ctx;
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/*
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* read data, return existing.
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*/
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ctx = (struct rpc_ctx *) b->ptr;
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if ( ctx->pos < ctx->filled ) {
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length = ctx->filled - ctx->pos;
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if ( length > outl ) length = outl;
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memmove ( out, &ctx->msg.data[ctx->pos], length );
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ctx->pos += length;
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return length;
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}
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/*
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* Requst more data from R channel.
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*/
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ctx->msg.channel = 'R';
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ctx->msg.function = 'G';
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ctx->msg.length = sizeof(ctx->msg.data);
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status = put ( b->num, (char *) &ctx->msg, RPC_HDR_SIZE );
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if ( (status&1) == 0 ) {
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return -1;
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}
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/*
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* Read.
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*/
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ctx->pos = ctx->filled = 0;
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status = get ( b->num, (char *) &ctx->msg, sizeof(ctx->msg), &length );
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if ( (status&1) == 0 ) length = -1;
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if ( ctx->msg.channel != 'R' || ctx->msg.function != 'C' ) {
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length = -1;
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}
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ctx->filled = length - RPC_HDR_SIZE;
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if ( ctx->pos < ctx->filled ) {
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length = ctx->filled - ctx->pos;
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if ( length > outl ) length = outl;
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memmove ( out, ctx->msg.data, length );
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ctx->pos += length;
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return length;
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}
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return length;
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}
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static int rtcp_write(BIO *b, char *in, int inl)
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{
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int status, i, segment, length;
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struct rpc_ctx *ctx;
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/*
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* Output data, send in chunks no larger that sizeof(ctx->msg.data).
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*/
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ctx = (struct rpc_ctx *) b->ptr;
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for ( i = 0; i < inl; i += segment ) {
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segment = inl - i;
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if ( segment > sizeof(ctx->msg.data) ) segment = sizeof(ctx->msg.data);
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ctx->msg.channel = 'R';
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ctx->msg.function = 'P';
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ctx->msg.length = segment;
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memmove ( ctx->msg.data, &in[i], segment );
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status = put ( b->num, (char *) &ctx->msg, segment + RPC_HDR_SIZE );
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if ((status&1) == 0 ) { i = -1; break; }
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status = get ( b->num, (char *) &ctx->msg, sizeof(ctx->msg), &length );
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if ( ((status&1) == 0) || (length < RPC_HDR_SIZE) ) { i = -1; break; }
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if ( (ctx->msg.channel != 'R') || (ctx->msg.function != 'C') ) {
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printf("unexpected response when confirming put %c %c\n",
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ctx->msg.channel, ctx->msg.function );
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}
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}
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return(i);
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}
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static long rtcp_ctrl(BIO *b, int cmd, long num, char *ptr)
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{
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long ret=1;
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switch (cmd)
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{
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case BIO_CTRL_RESET:
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case BIO_CTRL_EOF:
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ret = 1;
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break;
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case BIO_C_SET_FD:
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b->num = num;
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ret = 1;
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break;
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case BIO_CTRL_SET_CLOSE:
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case BIO_CTRL_FLUSH:
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case BIO_CTRL_DUP:
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ret=1;
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break;
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case BIO_CTRL_GET_CLOSE:
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case BIO_CTRL_INFO:
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case BIO_CTRL_GET:
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case BIO_CTRL_PENDING:
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case BIO_CTRL_WPENDING:
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default:
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ret=0;
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break;
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}
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return(ret);
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}
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static int rtcp_gets(BIO *bp, char *buf, int size)
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{
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return(0);
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}
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static int rtcp_puts(BIO *bp, char *str)
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{
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int length;
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if (str == NULL) return(0);
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length = strlen ( str );
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if ( length == 0 ) return (0);
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return rtcp_write ( bp,str, length );
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}
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