#ifndef ethH
#define ethH

#include "globals.h"

extern const unsigned char mymac[6];
extern const unsigned char myip[4];


//  BUFFER_SIZE jsem prestehoval do globals.h
//  bylo tady          1248
// na 48 bunce v bufferu zacinaji data pro vrtvr
// dali jsme tam 100 + ... to musi stacit 
//  ale struktura pro vetve MUSI mit 3 byte 

#define MAX_CLIENT           8


extern unsigned char buffer[BUFFER_SIZE];
/*****************/

/**************/
extern const unsigned char myname[15];
extern unsigned int max_tcp_packet;
extern unsigned char client[MAX_CLIENT][4];
// 0 = sum mac + port
// 1 = number sending block  + 0xFE 0xFD
// 2 = pointer - H           + 0xA0
// 3 = pointer - L


#define ETHTYPE_ARP 0x0806                            // typelen field values
#define ETHTYPE_IP  0x0800

#define ETH_TYPE_H           12
#define ETH_TYPE_L           13

#define IP_HEDLEN            14
#define IP_TOTLEN_H          16
#define IP_TOTLEN_L          17
#define IP_TYPEFIELD         23
#define PORT_FIELD_L         37

#define UDP_DATA             42
#define UDP_PORT_L           37
#define UDP_PORT_H           36
#define PORT_HTTP            80
#define PORT_FTP             21

#define TCP_PORT_L           37
#define TCP_PORT_H           36
#define TCP_BYTE             38
#define TCP_FLAGS            47
#define TCP_HEDLEN           46

#define ETH_HEADERLENGHT     14
#define TCP_HEADERLENGHT     20
#define IP_UDP_HEADERLENGHT  28
#define IP_TCP_HEADERLENGHT  40
#define IP_HEADERLENGHT      20
#define UDP_HEADERLENGHT      8


struct ETH_header {
  unsigned char ETH_destMac[6];                       // destination MAC address
  unsigned char ETH_sourceMac[6];                     // source MAC address
  unsigned int typelen;                               // protocol type or frame length
  unsigned char tail[];
};


// FUNCTION
extern void eth_init (void);
extern void eth_proc(void);

extern void eth ( unsigned char *buff);
extern void ack_received(unsigned char tcpflags);

extern unsigned char Checkbroadcast (void);
extern unsigned char Checkmymac(void);


#endif