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/*
* Copyright (c) 2013 TRUSTONIC LIMITED
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* 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.
*/
#ifndef _MC_KAPI_CONNECTION_H_
#define _MC_KAPI_CONNECTION_H_
#include <linux/semaphore.h>
#include <linux/mutex.h>
#include <stddef.h>
#include <stdbool.h>
struct connection {
/* Netlink socket */
struct sock *socket_descriptor;
/* Random? magic to match requests/answers */
uint32_t sequence_magic;
struct nlmsghdr *data_msg;
/* How much connection data is left */
uint32_t data_len;
/* Start pointer of remaining data */
void *data_start;
struct sk_buff *skb;
/* Data protection lock */
struct mutex data_lock;
/* Data protection semaphore */
struct semaphore data_available_sem;
/* PID address used for local connection */
pid_t self_pid;
/* Remote PID for connection */
pid_t peer_pid;
/* The list param for using the kernel lists */
struct list_head list;
};
struct connection *connection_new(void);
void connection_cleanup(struct connection *conn);
bool connection_connect(struct connection *conn, pid_t dest);
size_t connection_read_datablock(struct connection *conn, void *buffer,
uint32_t len);
size_t connection_read_data(struct connection *conn, void *buffer,
uint32_t len, int32_t timeout);
size_t connection_write_data(struct connection *conn, void *buffer,
uint32_t len);
int connection_process(struct connection *conn, struct sk_buff *skb);
#endif /* _MC_KAPI_CONNECTION_H_ */
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