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/** @file msg.h
    @brief xfrpc msg struct
    @author Copyright (C) 2016 Dengfeng Liu <liu_df@qq.com>
*/

#ifndef _MSG_H_
#define _MSG_H_

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <inttypes.h>

#include "client.h"
#include "common.h"

#define TYPE_LEN 1 //byte, char

#define MSG_TYPE_I 	0
#define MSG_LEN_I 	1
#define MSG_DATA_I	9

// msg_type match frp v0.10.0
enum msg_type {
	TypeLogin                 = 'o',
	TypeLoginResp             = '1',
	TypeNewProxy              = 'p',
	TypeNewProxyResp          = '2',
	TypeCloseProxy            = 'c',
	TypeNewWorkConn           = 'w',
	TypeReqWorkConn           = 'r',
	TypeStartWorkConn         = 's',
	TypeNewVisitorConn        = 'v',
	TypeNewVisitorConnResp    = '3',
	TypePing                  = 'h',
	TypePong                  = '4',
	TypeUDPPacket             = 'u',
	TypeNatHoleVisitor        = 'i',
	TypeNatHoleClient         = 'n',
	TypeNatHoleResp           = 'm',
	TypeNatHoleClientDetectOK = 'd',
	TypeNatHoleSid            = '5',
};

struct general_response {
	int	code;
	char	*msg;
};

struct control_response {
	int	type;
	int	code;
	char	*msg;
};

struct new_proxy_response {
	char 	*run_id;
	char 	*proxy_name;
	char	*error;
	int	remote_port;
};

struct work_conn {
	char *run_id;
};

struct udp_addr {
	char *addr;
	int port;
	char *zone;
};

struct udp_packet {
	char *content; // base64
	struct udp_addr *laddr;
	struct udp_addr *raddr;
};

struct __attribute__((__packed__)) msg_hdr {
	char		type;
	uint64_t	length;
	uint8_t		data[];
};

struct start_work_conn_resp {
	char 	*proxy_name;
};

int new_udp_packet_marshal(const struct udp_packet *udp, char **msg);
int new_proxy_service_marshal(const struct proxy_service *np_req, char **msg);
int msg_type_valid_check(char msg_type);
char *calc_md5(const char *data, int datalen);
char *get_auth_key(const char *token, long int *timestamp);
size_t login_request_marshal(char **msg);

// tranlate control request to json string
struct new_proxy_response *new_proxy_resp_unmarshal(const char *jres);
struct login_resp *login_resp_unmarshal(const char *jres);
struct start_work_conn_resp *start_work_conn_resp_unmarshal(const char *resp_msg);

// parse json string to control response
struct control_response *control_response_unmarshal(const char *jres);
struct work_conn *new_work_conn();
int new_work_conn_marshal(const struct work_conn *work_c, char **msg);

// parse json string to udp packet
struct udp_packet *udp_packet_unmarshal(const char *jres);

void udp_packet_free(struct udp_packet *udp);

void control_response_free(struct control_response *res);

char *get_msg_type(uint8_t type);

#endif //_MSG_H_
