/**************************************************************************/
/*  packet_peer_mbed_dtls.h                                               */
/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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#ifndef PACKET_PEER_MBED_DTLS_H
#define PACKET_PEER_MBED_DTLS_H

#include "core/io/packet_peer_dtls.h"
#include "tls_context_mbedtls.h"

#include <mbedtls/timing.h>

class PacketPeerMbedDTLS : public PacketPeerDTLS {
private:
	enum {
		PACKET_BUFFER_SIZE = 65536
	};

	uint8_t packet_buffer[PACKET_BUFFER_SIZE];

	Status status = STATUS_DISCONNECTED;
	String hostname;

	Ref<PacketPeerUDP> base;

	static PacketPeerDTLS *_create_func();

	static int bio_recv(void *ctx, unsigned char *buf, size_t len);
	static int bio_send(void *ctx, const unsigned char *buf, size_t len);
	void _cleanup();

protected:
	Ref<TLSContextMbedTLS> tls_ctx;
	mbedtls_timing_delay_context timer;

	Error _do_handshake();
	int _set_cookie();

public:
	virtual void poll();
	virtual Error accept_peer(Ref<PacketPeerUDP> p_base, Ref<TLSOptions> p_options, Ref<CookieContextMbedTLS> p_cookies = Ref<CookieContextMbedTLS>());
	virtual Error connect_to_peer(Ref<PacketPeerUDP> p_base, const String &p_hostname, Ref<TLSOptions> p_options = Ref<TLSOptions>());
	virtual Status get_status() const;

	virtual void disconnect_from_peer();

	virtual Error get_packet(const uint8_t **r_buffer, int &r_buffer_size);
	virtual Error put_packet(const uint8_t *p_buffer, int p_buffer_size);

	virtual int get_available_packet_count() const;
	virtual int get_max_packet_size() const;

	static void initialize_dtls();
	static void finalize_dtls();

	PacketPeerMbedDTLS();
	~PacketPeerMbedDTLS();
};

#endif // PACKET_PEER_MBED_DTLS_H