libchannel
an abstraction around communications channels
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libchannel-internal.h
Go to the documentation of this file.
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/*-
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* Copyright (c) 2012 Jonathan Anderson
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* All rights reserved.
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*
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* This software was developed by SRI International and the University of
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* Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
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* ("CTSRD"), as part of the DARPA CRASH research programme.
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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 above 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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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#ifndef _LIBCHANNEL_INTERNAL_H_
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#define _LIBCHANNEL_INTERNAL_H_
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#include "
libchannel.h
"
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#include <stdbool.h>
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typedef
struct
channel
{
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int
magic;
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int (*size)(
struct
channel
*);
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int (*copy)(
struct
channel
*,
void
*dest);
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int (*send)(
struct
channel
*,
struct
message
*);
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}
channel
;
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typedef
struct
message
{
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size_t
total_len;
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array(
char
) data;
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array(
int
) descriptors;
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array(
channel
) channels;
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}
message
;
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void
channel_init(
channel
*,
int
magic,
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int
(*size)(
struct
channel
*),
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int
(*copy)(
struct
channel
*,
void
*dest),
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int
(*send)(
struct
channel
*,
struct
message
*)
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);
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int
channel_size
(
channel
*);
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int
channel_copy(
void
*dest,
channel
*src);
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/*
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* Several channel implementations follow.
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*/
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typedef
struct
uds_channel {
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channel
super;
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int
socket;
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} uds_channel;
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#define UDS_MAGIC 0xBCAEAB67
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uds_channel* uds_create(
int
sock);
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channel
* uds_wrap(uds_channel*);
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uds_channel* uds_unwrap(
channel
*);
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int
uds_descriptor(
channel
*);
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int
uds_size(
channel
*);
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int
uds_copy(
channel
*,
void
*);
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int
uds_send(
channel
*,
message
*);
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#endif
/* !_LIBCHANNEL_INTERNAL_H_ */
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