netheader.h

pxa270 的bootloader源码

#ifndef _PROTOCOL_H
#define _PROTOCOL_H

#include <types.h>

#pragma pack(1)
struct ethhdr {
	uint8  et_dest[6];		// destination mac address
	uint8  et_src[6];		// source mac address.
	uint16 et_protlen;		// if ethernet header protocol, else length.
/*
	uint8  et_dsap;			// DSAP.
	uint8  et_ssap;			// SSAP.
	uint8  et_ctl;			// contorl.
	uint8  et_snap1;		// SNAP.
	uint8  et_snap2;
	uint8  et_snap3;
	uint16 et_prot;			// protocol.
*/
};
#pragma pack()
#define	ETHER_HDR_SIZE			14
#define	E802_HDR_SIZE			22
#define PROT_IP					0x0800
#define	PROT_ARP				0x0806
#define PROT_RARP				0x8035
#define ETH_ALEN				6				// Octets in one ethernet addr.


struct iphdr {
	uint8  ip_hl_v;		// version and header length(version篮 泅犁 4, length绰 4 byte 窜困).
	uint8  ip_tos;		// type of service.
	uint16 ip_len;		// total length (IP Header甫 器窃茄 辨捞).
	uint16 ip_id;		// identification.
	uint16 ip_off;		// fragment offset field.
	uint8  ip_ttl;		// time to live (盔窍绰 蔼, 0x40 or 0xff).
	uint8  ip_p;		// protocol (UDP:17).
	uint16 ip_chksum;	// checksum.
	uint32 ip_src;		// source ip address.
	uint32 ip_dest;		// destination ip address.
};
#define IP_HDR_SIZE		20
#define IP_P_UDP		0x11	// 17
#define IP_P_ICMP		0x01	// 1


struct udphdr {
	uint16	udp_src;	// udp source port.
	uint16	udp_dest;	// udp destination port.
	uint16	udp_len;	// length of udp packet.
	uint16	udp_chksum;	// checksum.
};
#define UDP_HDR_SIZE	8


// Address Resolution Protocol (ARP) header.
struct arphdr {
	uint16 ar_hrd;		// Format of hardware address.
	uint16 ar_pro;		// Format of protocol address.
	uint8  ar_hln;		// Length of hardware address.
	uint8  ar_pln;		// Length of protocol address.
	uint16 ar_op;		// Operation.
	uint8  ar_data[0];
#if 0
	uint8  ar_sha[];	// Sender hardware address.
	uint8  ar_spa[];	// Sender protocol address.
	uint8  ar_tha[];	// Target hardware address.
	uint8  ar_tpa[];	// Target protocol address.
#endif // 0
};

#define ARP_HDR_SIZE			(8+20)	// Size assuming ethernet.
// for ar_hrd of ARP_HEADER.
#define ARP_ETHER				1		// Ethernet hardware address.
// for ar_op of ARP_HEADER.
#define ARPOP_REQUEST			1		// Request to resolve address.
#define ARPOP_REPLY				2		// Response to previous request.
#define RARPOP_REQUEST			3		// Request to resolve address.
#define RARPOP_REPLY			4		// Response to previous request.
#define ETH_P_IP				0x0800	// Internet Protocol packet.

// BOOTP header.
struct bootp {
	uint8  bh_opcode;		// Operation.
	uint8  bh_htype;		// Hardware type.
	uint8  bh_hlen;			// Hardware address length.
	uint8  bh_hops;			// Hop count (gateway thing).
	uint32 bh_tid;			// Transaction ID.
	uint16 bh_secs;			// Seconds since boot.
	uint16 bh_res1;			// Reserved(alignment).
	uint32 bh_ciaddr;		// Client IP address.
	uint32 bh_yiaddr;		// Your (client) IP address.
	uint32 bh_siaddr;		// Server IP address(Server啊 setting).
	uint32 bh_giaddr;		// Gateway IP address.
	uint8  bh_chaddr[16];	// Client hardware address(Mac Address).
	uint8  bh_sname[64];	// Server host name.
	uint8  bh_file[128];	// Boot file name.
	uint8  bh_vend[64];		// Vendor information.
};
#define BOOTP_HDR_SIZE			300
#define BOOTP_SIZE				(ETHER_HDR_SIZE + IP_HDR_SIZE + UDP_HDR_SIZE + BOOTP_HDR_SIZE)
#define OP_BOOTREQUEST			1
#define OP_BOOTREPLY	 		2
#define HWT_ETHER	 			1
#define HWL_ETHER			    0x06


struct icmphdr {
	uint8  type;
	uint8  code;
	uint16 chksum;			// check sum
	uint16 id;				// identifier
	uint16 seq;				// Sequence number
};
#define ICMP_ECHO_REQUEST		(0x08)
#define ICMP_ECHO_REPLY			(0x00)


#endif