tcpip_stack.h

来自「最新版IAR FOR ARM（EWARM）5.11中的代码例子」· C头文件 代码 · 共 190 行

//-----------------------------------------------------------------------------
// TCPIP_PACKETS
//-----------------------------------------------------------------------------

#ifndef TCPIP_STACK
#define TCPIP_STACK

#include "hal_type.h"
#include "hal_mac.h"


#define IP_ADDR_LEN 4

#define IP_HEADER_LENGTH 20
#define UDP_HEADER_LENGTH 8
#define TCP_HEADER_LENGTH 28
#define ICMP_HEADER_LENGTH 8


//*****************************************************************************
//* Macros
//*****************************************************************************
#define ChangeEndianess_16(f) (f=(((f >> 8) & 0x00FF) + ((f << 8) & 0xFF00)))
#define ChangeEndianess_32(s) (s=(((s >> 24) & 0x000000FF) + ((s >> 8) & 0x0000FF00) + \
                              ((s << 24) & 0xFF000000) + ((s << 8) & 0x00FF0000)))


//*****************************************************************************
//* Ethernet Header data types
//*****************************************************************************
#define ETHER_IP 0x0800
#define ETHER_IP_R 0x8

//*****************************************************************************
//* Ethernet Header
//*****************************************************************************
typedef struct
{
  u8 dest_mac[MAC_ADDR_LEN];		// destination MAC address
  u8 src_mac[MAC_ADDR_LEN];		// source MAC address
  u8 type[2];				// packet type
} ether_hdr;


//*****************************************************************************
//* Ethernet ARP Header
//*****************************************************************************

#define ETHER_ARP 0x0806

typedef struct
{
	u16 hw; 		// Hardware Address space, specifies the type of HW
	u16 protocol;		// Protocol Address format, the same as type in eth_hdr
	u8  mac_hdr_len;        // Byte length of each hardware address, for us = 0x6
	u8  ip_hdr_len;             // Byte length of each protocol address, for IP = 0x4
	u16 opcode;		// Opcode, ARP request (0x1) or reply (0x2)
} arp_hdr;

#define ARP_REQUEST 0x0100
#define ARP_REPLY 0x0200
#define ARP_HRD_ETHER 0x0100

typedef struct
{
	arp_hdr eth_arp_hdr;
	u8 srcMAC[MAC_ADDR_LEN];	// Source MAC address
	u8 srcIP[4];	                // 32 bit IP addresss of the Source
	u8 destMAC[MAC_ADDR_LEN];	// Receiver's MAC address
	u8 destIP[4];		        // 32 bit IP addresss of the Receiver
} ether_arp;


//*****************************************************************************
//* Ethernet IP Header
//*****************************************************************************

typedef struct
{
	u8 version;	// version - 4 bits, Internet Header Length - 4 bits
	u8 service;		// Type of Service - 8 bits, quality of service requested
	u16 length;     // Total Length of the datagram - 16 bits, datagram + header + data
	u16 id;		// Identification of datagram - 16 bits, unique number set by the sender
	u16 offset;    // Flags - 3 bits + Fragment Offset - 13 bits
	u8 ttl;		// Time to Live - 8 bits, in seconds
        u8 protocol;	// Protocol - 8 bits, protcol which is addressed by this datagram: UDP 0x11, ICMP 0x1, TCP 0x6  ..
	u16 hdrchksum;  // Header Checksum - 16 bits, does not include data
	u8 srcIP[4];	// Source IP Address - 32 bits, sender
	u8 destIP[4];	// Destination IP Address - 32 bits, receiver
}ip_hdr;

#define IP_ICMP 0x1
#define IP_TCP 0x6
#define IP_UDP 0x11


//*****************************************************************************
//*****************************************************************************
//* HIGHER PROTOCOLS, ABOVE IP
//*****************************************************************************
//*****************************************************************************
//*****************************************************************************
//* ICMP IP
//*****************************************************************************

typedef struct
{
  u8  type;  //specifies the type of the message: 0x0 - 0x18
  u8  errcode; //error code reported on this ICMP message
  u16 chksum;
  u16 id;
  u16 sequence;
}icmp_hdr;

#define ICMP_ECHOREPLY          0       /* Echo Reply                   */
#define ICMP_DEST_UNREACH       3       /* Destination Unreachable      */
#define ICMP_SOURCE_QUENCH      4       /* Source Quench                */
#define ICMP_REDIRECT           5       /* Redirect (change route)      */
#define ICMP_ECHO               8       /* Echo Request                 */
#define ICMP_TIME_EXCEEDED      11      /* Time Exceeded                */
#define ICMP_PARAMETERPROB      12      /* Parameter Problem            */
#define ICMP_TIMESTAMP          13      /* Timestamp Request            */
#define ICMP_TIMESTAMPREPLY     14      /* Timestamp Reply              */
#define ICMP_INFO_REQUEST       15      /* Information Request          */
#define ICMP_INFO_REPLY         16      /* Information Reply            */
#define ICMP_ADDRESS            17      /* Address Mask Request         */
#define ICMP_ADDRESSREPLY       18      /* Address Mask Reply           */

//*****************************************************************************
//* UDP IP
//*****************************************************************************

typedef struct
{
	u16 src_port;		// Source port, optional
	u16 dst_port;		// Destination port
	u16 length;		// Length of datagram in bytes, incl. header
	u16 checksum;		// Checksum of psuedo-header
}udp_hdr;

#define SRC_UDP_PORT 0x88A4
#define DST_UDP_PORT 0x7777
//*****************************************************************************
//* TCP IP
//*****************************************************************************

typedef struct
{
	u16 src_port;		// Source port
	u16 dst_port;		// Destination port
	u32 seq;		// Sequence number
	u32 ack;		// Acknowledgement number
	u8 data_off;		// Data offset - upper 4 bits + 4 reserved
	u8 control;	        // 2 reserved + 6 Control bits - lower 6 bits
	u16 window;		// Window, used in ACK segments
	u16 checksum;		// Checksum
	u16 urgent_pt;    // Points to the first data octet
	u32 options; //may additionally follow
        u32 options2;
}tcp_hdr;


// Global TCP/IP stack variables
extern u8 destIP[4];
extern u8 destMAC[6];
extern u8 srcMAC[6];
extern u8 srcIP[4];

extern u8 brcastADD[4];
extern u8 etherIP[2];
extern u8 etherARP[2];
extern u8 httpPORT[2];


//-----------------------------------------------------------------------------
// Functions
//-----------------------------------------------------------------------------
void Receive_ICMP(EthernetFrame *frame);
void Receive_UDP(EthernetFrame *frame);
void Receive_TCP(EthernetFrame *frame);
void Receive_ARP(EthernetFrame *frame);

void Send_ICMP(EthernetFrame *frame);
void Send_UDP(EthernetFrame *frame);
void Send_TCP(EthernetFrame *frame);
void Send_ARP(EthernetFrame *frame);


#endif