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319 lines
9.2 KiB
319 lines
9.2 KiB
/* 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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/*- |
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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 { |
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short status, count; |
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long flags; |
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}; |
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/* Should have member alignment inhibited */ |
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struct rpc_msg { |
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/* 'A'-app data. 'R'-remote client 'G'-global */ |
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char channel; |
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/* 'G'-get, 'P'-put, 'C'-confirm, 'X'-close */ |
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char function; |
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/* Amount of data returned or max to return */ |
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unsigned short int length; |
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/* variable data */ |
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char data[4092]; |
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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, const 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, const 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, void *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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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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/* |
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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$_READVBLK, &iosb, 0, 0, |
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buffer, maxlen, 0, 0, 0, 0); |
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if ((status & 1) == 1) |
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status = iosb.status; |
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if ((status & 1) == 1) |
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*length = iosb.count; |
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return status; |
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} |
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static int put(io_channel chan, char *buffer, int length) |
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{ |
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int status; |
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struct io_status iosb; |
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status = sys$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) |
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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 = OPENSSL_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) |
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return (0); |
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if (a->ptr) |
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OPENSSL_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) |
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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) |
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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) |
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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, const 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)) |
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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) { |
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i = -1; |
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break; |
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} |
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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)) { |
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i = -1; |
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break; |
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} |
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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, void *ptr) |
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{ |
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long ret = 1; |
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switch (cmd) { |
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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, const char *str) |
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{ |
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int length; |
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if (str == NULL) |
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return (0); |
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length = strlen(str); |
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if (length == 0) |
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return (0); |
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return rtcp_write(bp, str, length); |
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}
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