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/**
* mds — A micro-display server
* Copyright © 2014, 2015, 2016, 2017 Mattias Andrée (maandree@kth.se)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef MDS_MDS_SERVER_QUEUED_INTERCEPTION_H
#define MDS_MDS_SERVER_QUEUED_INTERCEPTION_H
#include "client.h"
#include <stdint.h>
#define QUEUED_INTERCEPTION_T_VERSION 0
/**
* A queued interception
*/
typedef struct queued_interception {
/**
* The intercepting client
*/
struct client *client;
/**
* The interception priority
*/
int64_t priority;
/**
* Whether the messages may get modified by the client
*/
int modifying;
/**
* The file descriptor of the intercepting client's socket (used for unmarshalling)
*/
int socket_fd;
} queued_interception_t;
/**
* Calculate the buffer size need to marshal a queued interception
*
* @param this The client information
* @return The number of bytes to allocate to the output buffer
*/
__attribute__((const, nonnull))
size_t queued_interception_marshal_size(void);
/**
* Marshals a queued interception
*
* @param this The queued interception
* @param data Output buffer for the marshalled data
* @return The number of bytes that have been written (everything will be written)
*/
__attribute__((nonnull))
size_t queued_interception_marshal(const queued_interception_t *restrict this, char *restrict data);
/**
* Unmarshals a queued interception
*
* @param this Memory slot in which to store the new queued interception
* @param data In buffer with the marshalled data
* @return Zero on error, `errno` will be set accordingly, otherwise the number of read bytes.
*/
__attribute__((nonnull))
size_t queued_interception_unmarshal(queued_interception_t *restrict this, char *restrict data);
/**
* Pretend to unmarshal a queued interception
*
* @param data In buffer with the marshalled data
* @return The number of read bytes
*/
__attribute__((const, nonnull))
size_t queued_interception_unmarshal_skip(void);
#endif
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