// Copyright(c) 2017-2020, Intel Corporation

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//****************************************************************************

/// @file  mmlink_connection.h

/// @brief Basic AFU interaction.

/// @ingroup SigTap

/// @verbatim

//****************************************************************************

#ifndef MMLINK_CONNECTION_H

#define MMLINK_CONNECTION_H

#include <sys/socket.h>

#include <unistd.h>

#include "mm_debug_link_interface.h"

#include "mmlink_server.h"

class mmlink_connection

{

public:

	// m_bufsize is the size of the buffer for h2t data

	mmlink_connection(mmlink_server*);

	~mmlink_connection() { close_connection(); delete[] m_buf; }

	bool is_open() { return m_fd >= 0; }

	bool is_data() { return m_is_data; }

	bool is_bound() { return m_is_bound; }

	void set_is_data(void) { m_is_data = true; }

	size_t send(const char *msg, const size_t len);

	void close_connection() { if (is_open()) ::close(m_fd); init(); }

	void bind() { m_is_bound = true; }

	void socket(int socket) { m_fd = socket; }

	int getsocket() { return m_fd; }

	int handle_receive();

	int handle_management(void);

	char *buf(void) { return m_buf; }

	void buf_end(size_t index) { m_buf_end = index; }

	size_t buf_end(void) { return m_buf_end; }

	static const char *UNKNOWN;

	static const char *OK;

protected:

	int m_fd;

	bool m_is_bound;

	bool m_is_data;

	const int m_bufsize;

	mmlink_server *m_server;

	char *m_buf;

	volatile size_t m_buf_end;

	void init(mmlink_server *server) { m_server = server; init(); }

	mmlink_connection(const mmlink_connection& mm_conn):m_bufsize( mm_conn.m_bufsize)

		{

			m_fd             = mm_conn.m_fd;

			m_buf_end        = mm_conn.m_buf_end;

			m_is_bound       = mm_conn.m_is_bound;

			m_is_data        = mm_conn.m_is_data;

			m_server         = mm_conn.m_server;

			m_buf= new char[m_bufsize];

			strncpy(m_buf, mm_conn.m_buf, m_bufsize);

		}

		mmlink_connection& operator=(const mmlink_connection& mm_conn)

		{

			if( this != &mm_conn) {

				m_fd             = mm_conn.m_fd;

				m_buf_end        = mm_conn.m_buf_end;

				m_is_bound       = mm_conn.m_is_bound;

				m_is_data        = mm_conn.m_is_data;

				m_server         = mm_conn.m_server;

				if(m_buf) delete m_buf;

				m_buf = new char[m_bufsize];

				strncpy(m_buf, mm_conn.m_buf, m_bufsize);

			}

			return *this;

		}

private:

	int handle_data(void);

	int handle_management_command(char *cmd);

	int handle_unbound_command(char *cmd);

	int handle_bound_command(char *cmd);

	int get_server_id(void) { return m_server->get_server_id(); }

	mm_debug_link_interface *driver(void) {

		return m_server->get_driver_fd();

	}

	void init(void) { m_fd = -1; m_is_bound = false;

				m_is_data = false; m_buf_end = 0; }

};

#endif