//
// config.h
//
// Created by foxist on 2019/8/13.
//

#ifndef config_h
#define config_h

//#define NAT_DEBUG

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>

#include <cjson/cJSON.h>

#ifndef NAT_DEBUG
#include "rpc.h"
#endif

#ifdef NAT_DEBUG
typedef enum ret_code {
    RET_OK,
    RET_ERR,
    RET_NOMEM,
    RET_INPUTERR
} ret_code; 

#endif


#define MAX_ERR_MSG 1024
#define MAX_LINE_LEN 384
#define MAX_ACTION 8
#define MAX_ID 5
#define MAX_CHAIN 15
#define MAX_TARGET 15
#define MAX_PROT 15
#define MAX_ADDR 45
#define MAX_IP 33
#define MAX_PORT 5
#define MAX_DEVICE 15
#define MAX_MATCH 6
#define MAX_MATCH_INFO 10 
#define IPT_PARANUM 14
#define NF_PARANUM 8

#define SUCCESS 1
#define FAIL 0

typedef unsigned char uchar;
typedef char *iptables_rule;
typedef int boolean;

struct ipt_config{
    char action[MAX_ACTION];            // 动作：0: delete, 1: add, 2: save, 3: restore
    
    char id[MAX_ID];                         // 配置删除id

    char chain[MAX_CHAIN];          // 链
    char target[MAX_TARGET];        //
    char prot[MAX_PROT];            // 协议
    char source[MAX_IP];          // 源地址
    char destination[MAX_IP];     // 目的地址
    char sport[MAX_PORT];
    char dport[MAX_PORT];           // 端口号
    char to[MAX_ADDR];
    //union {
        char i_device[MAX_DEVICE];
        char o_device[MAX_DEVICE];
    //}
    
    
    char match[MAX_MATCH];
    char match_info[MAX_MATCH_INFO];
};

typedef struct range_ipt_config {
    int begin;
    int offset;
    
    struct ipt_config conf;
} range_ipt_config;

typedef struct ip_port {
    char ip[MAX_IP];
    char port[MAX_PORT];
} ip_port;

typedef struct nf_conntrack {
    ip_port addr[4];

    char prot[MAX_PROT];
} nf_conntrack;


/* ======================== PUBLIC API ============================*/

//  从iptables-save配置文件中，获取json格式的nat配置信息
ret_code get_iptables_config(const char *json, const char * __restrict__ __filename, 
                        char *output, int *outlen, char **msg);

// 使用json数据格式，配置ipables nat
ret_code set_iptables_config(const char *json, char **msg);

//ret_code get_nf_conntrack(const char * __restrict__ __filename, 
//                        char *output, int *outlen, char **msg);

// linux系统命令执行函数, 返回shell信息
ret_code run_command(char *const cmd, char **msg);

#endif /* config_h */