#include <stdarg.h>  
#include "lwip/tcp.h" 
#include "ff.h"
#include "diskio.h"

#define msg110 "110 MARK %s = %s."    
#define msg120 "120 Service ready in nnn minutes."   
#define msg125 "125 Data connection already open; transfer starting."   
#define msg150 "150 File status okay; about to open data connection."    
#define msg150recv "150 Opening BINARY mode data connection for %s (%i bytes)."   
#define msg150stor "150 Opening BINARY mode data connection for %s."    
#define msg200 "200 Command okay."   
#define msg202 "202 Command not implemented, superfluous at this site."   
#define msg211 "211 System status, or system help reply."   
#define msg212 "212 Directory status."   
#define msg213 "213 ."   
#define msg214 "214 %s."   
#define msg214SYST "214 %s system type."   
#define msg220 "220 Enlogic PDU FTP Server ready."     
#define msg221 "221 Goodbye."    
#define msg225 "225 Data connection open; no transfer in progress."   
#define msg226 "226 Closing data connection."    
#define msg227 "227 Entering Passive Mode (%i,%i,%i,%i,%i,%i)."    
#define msg230 "230 User logged in, proceed."   
#define msg250 "250 Requested file action okay, completed."   
#define msg257PWD "257 \"%s\" is current directory."   
#define msg257 "257 \"%s\" created."   
#define msg331 "331 User name okay, need password."   
#define msg332 "332 Need account for login."   
#define msg350 "350 Requested file action pending further information."   
#define msg421 "421 Service not available, closing control connection."    
#define msg425 "425 Can't open data connection."   
#define msg426 "426 Connection closed; transfer aborted."   
#define msg450 "450 Requested file action not taken."   
#define msg451 "451 Requested action aborted: local error in processing."   
#define msg452 "452 Requested action not taken."    
#define msg500 "500 Syntax error, command unrecognized."    
#define msg501 "501 Syntax error in parameters or arguments."   
#define msg502 "502 Command not implemented."   
#define msg503 "503 Bad sequence of commands."   
#define msg504 "504 Command not implemented for that parameter."   
#define msg530 "530 Not logged in."   
#define msg532 "532 Need account for storing files."   
#define msg550 "550 Requested action not taken."   
#define msg551 "551 Requested action aborted: page type unknown."   
#define msg552 "552 Requested file action aborted."   
#define msg553 "553 Requested action not taken."   
  
#define 	FTP_THREAD_PRIO 	7
#define  	SFIFO_MAX_BUFFER_SIZE   256
#define  	DATACONNECT_BUFFER_SIZE 2048

enum ftpd_state_e {  
    FTPD_USER,  FTPD_PASS,  FTPD_IDLE,  FTPD_NLST,  
	FTPD_LIST,  FTPD_RETR,  FTPD_RNFR,  FTPD_STOR,  
	FTPD_QUIT  
};

typedef struct sfifo_t   
{   
    char *buffer;   
    int size;           
    int readpos;     
    int writepos;   
} sfifo_t; 


struct ftpd_datastate 
{   
    int connected;   
	FIL *fil;
	DIR *dir;
	FILINFO *fno;
    sfifo_t fifo;   
    struct tcp_pcb *msgpcb;  
    struct ftpd_msgstate *msgfs;  
};  
  
struct ftpd_msgstate 
{   
    enum ftpd_state_e state;   
    sfifo_t fifo; 
	u16_t dataport;
	int passive;     
	char *renamefrom;   
    struct ip_addr dataip;    
    struct tcp_pcb *datapcb;   
    struct tcp_pcb *listenpcb;   
    struct ftpd_datastate *datafs;   
};  

struct ftpd_command 
{  
    char *cmd;  
    void (*func) (const char *arg, struct tcp_pcb * pcb, struct ftpd_msgstate * fsm);  
}; 
   
#define SFIFO_SIZEMASK(x)   ((x)->size - 1)        
#define sfifo_used(x)   (((x)->writepos - (x)->readpos) & SFIFO_SIZEMASK(x))    
#define sfifo_space(x)  ((x)->size - 1 - sfifo_used(x))        

void ftpd_init(void);
void Ftp_task(void *pvArg);