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/*********************************************

 * vim:sw=8:ts=8:si:et

 * To use the above modeline in vim you must have "set modeline" in your .vimrc

 * Author: Guido Socher

 * Copyright: GPL V2

 *

 * Based on the net.h file from the AVRlib library by Pascal Stang.

 * For AVRlib See http://www.procyonengineering.com/

 * Used with explicit permission of Pascal Stang.

 *

 * Chip type           : ATMEGA88 with ENC28J60

 *********************************************/

// notation: _P = position of a field

//           _V = value of a field

//@{

#ifndef NET_H

#define NET_H

// ******* ETH *******

#define ETH_HEADER_LEN  14

// values of certain bytes:

#define ETHTYPE_ARP_H_V 0x08

#define ETHTYPE_ARP_L_V 0x06

#define ETHTYPE_IP_H_V  0x08

#define ETHTYPE_IP_L_V  0x00

// byte positions in the ethernet frame:

//

// Ethernet type field (2bytes):

#define ETH_TYPE_H_P 12

#define ETH_TYPE_L_P 13

//

#define ETH_DST_MAC 0

#define ETH_SRC_MAC 6

// ******* ARP *******

#define ETH_ARP_OPCODE_REPLY_H_V 0x0

#define ETH_ARP_OPCODE_REPLY_L_V 0x02

//

#define ETHTYPE_ARP_L_V 0x06

// arp.dst.ip

#define ETH_ARP_DST_IP_P 0x26

// arp.opcode

#define ETH_ARP_OPCODE_H_P 0x14

#define ETH_ARP_OPCODE_L_P 0x15

// arp.src.mac

#define ETH_ARP_SRC_MAC_P 0x16

#define ETH_ARP_SRC_IP_P 0x1c

#define ETH_ARP_DST_MAC_P 0x20

#define ETH_ARP_DST_IP_P 0x26

// ******* IP *******

#define IP_HEADER_LEN   20

// ip.src

#define IP_SRC_P 0x1a

#define IP_DST_P 0x1e

#define IP_HEADER_LEN_VER_P 0xe

#define IP_CHECKSUM_P 0x18

#define IP_TTL_P 0x16

#define IP_FLAGS_P 0x14

#define IP_P 0xe

#define IP_TOTLEN_H_P 0x10

#define IP_TOTLEN_L_P 0x11

#define IP_PROTO_P 0x17  

#define IP_PROTO_ICMP_V 1

#define IP_PROTO_TCP_V 6

// 17=0x11

#define IP_PROTO_UDP_V 17

// ******* ICMP *******

#define ICMP_TYPE_ECHOREPLY_V 0

#define ICMP_TYPE_ECHOREQUEST_V 8

//

#define ICMP_TYPE_P 0x22

#define ICMP_CHECKSUM_P 0x24

// ******* UDP *******

#define UDP_HEADER_LEN  8

//

#define UDP_SRC_PORT_H_P 0x22

#define UDP_SRC_PORT_L_P 0x23

#define UDP_DST_PORT_H_P 0x24

#define UDP_DST_PORT_L_P 0x25

//

#define UDP_LEN_H_P 0x26

#define UDP_LEN_L_P 0x27

#define UDP_CHECKSUM_H_P 0x28

#define UDP_CHECKSUM_L_P 0x29

#define UDP_DATA_P 0x2a

// ******* TCP *******

#define TCP_SRC_PORT_H_P 0x22

#define TCP_SRC_PORT_L_P 0x23

#define TCP_DST_PORT_H_P 0x24

#define TCP_DST_PORT_L_P 0x25

// the tcp seq number is 4 bytes 0x26-0x29

#define TCP_SEQ_H_P 0x26

#define TCP_SEQACK_H_P 0x2a

// flags: SYN=2

#define TCP_FLAGS_P 0x2f

#define TCP_FLAGS_SYN_V 2

#define TCP_FLAGS_FIN_V 1

#define TCP_FLAGS_PUSH_V 8

#define TCP_FLAGS_SYNACK_V 0x12

#define TCP_FLAGS_ACK_V 0x10

#define TCP_FLAGS_PSHACK_V 0x18

//  plain len without the options:

#define TCP_HEADER_LEN_PLAIN 20

#define TCP_HEADER_LEN_P 0x2e

#define TCP_CHECKSUM_H_P 0x32

#define TCP_CHECKSUM_L_P 0x33

#define TCP_OPTIONS_P 0x36

//

#endif

//@}