www.pudn.com > Hook-Driver£­by.rar > NetHeaders.h

/* 
 
  NetHeaders.h 
 
  Autor: Jesús O. 
  Last Updated: 15/02/2003 
 
 
*/ 
 
#ifndef _NetHeaders_h_ 
#define _NetHeaders_h_ 
 
 
#pragma pack(1) 
 
 
#define	IP_DF 0x4000			// dont fragment flag 
#define	IP_MF 0x2000			// more fragments flag 
#define	IP_OFFMASK 0x1fff		// mask for fragmenting bits 
 
enum 
  { 
    IPPROTO_IP					= 0,		// Dummy protocol for TCP. 
    IPPROTO_HOPOPTS				= 0,		// IPv6 Hop-by-Hop options.  */ 
    IPPROTO_ICMP				= 1,		// Internet Control Message Protocol.  */ 
    IPPROTO_IGMP				= 2,		// Internet Group Management Protocol. */ 
    IPPROTO_IPIP				= 4,		// IPIP tunnels (older KA9Q tunnels use 94).  */ 
    IPPROTO_TCP					= 6,		// Transmission Control Protocol.  */ 
    IPPROTO_EGP					= 8,		// Exterior Gateway Protocol.  */ 
    IPPROTO_PUP					= 12,		//	PUP protocol.  */ 
    IPPROTO_UDP					= 17,		//	User Datagram Protocol.  */ 
    IPPROTO_IDP					= 22,		//  XNS IDP protocol.  */ 
    IPPROTO_TP					= 29,		//  SO Transport Protocol Class 4.  */ 
    IPPROTO_IPV6				= 41,		//	IPv6 header.  */ 
    IPPROTO_ROUTING				= 43,		//	IPv6 routing header.  */ 
    IPPROTO_FRAGMENT			= 44,		//	IPv6 fragmentation header.  */ 
    IPPROTO_RSVP				= 46,		//  Reservation Protocol.  */ 
    IPPROTO_GRE					= 47,		//  General Routing Encapsulation.  */ 
    IPPROTO_ESP					= 50,		// encapsulating security payload.  */ 
    IPPROTO_AH					= 51,		// authentication header.  */ 
    IPPROTO_ICMPV6				= 58,		// ICMPv6.  */ 
    IPPROTO_NONE				= 59,		/* IPv6 no next header.  */ 
    IPPROTO_DSTOPTS				= 60,		/* IPv6 destination options.  */ 
    IPPROTO_MTP					= 92,		/* Multicast Transport Protocol.  */ 
    IPPROTO_ENCAP				= 98,		/* Encapsulation Header.  */ 
    IPPROTO_PIM					= 103,		/* Protocol Independent Multicast.  */ 
    IPPROTO_COMP				= 108,		/* Compression Header Protocol.  */ 
    IPPROTO_RAW					= 255,		/* Raw IP packets.  */ 
    IPPROTO_MAX 
  }; 
 
 
typedef struct _IPHeader  
{ 
	UCHAR	headerLength:4;	// Header length  
	UCHAR	version:4;		// Version  
	UCHAR	tos;			// Type of service  
	USHORT	length;			// Total length  
	USHORT	id;				// Identification  
	USHORT	offset;			// Fragment offset field 
	UCHAR	ttl;			// Time to live  
	UCHAR	protocol;		// Protocol  
	USHORT	checksum;		// Checksum  
	ULONG	source;			// Source address  
	ULONG	destination;	// Destination address  
}IPHeader, *PIPHeader; 
 
 
typedef struct _ICMPHeader 
{ 
	UCHAR	type;			// Type of message  
	UCHAR	code;			// Code 
	USHORT	checksum;		// Checksum 
}ICMPHeader, *PICMPHeader; 
 
 
typedef struct _UDPHeader 
{ 
	USHORT	sourcePort;			// Source port 
	USHORT	destinationPort;	// Destination port 
	USHORT	length;				// Length 
	USHORT	checksum;			// Checksum 
}UDPHeader, *PUDPHeader; 
 
 
// TCP Flags 
#define	TH_FIN	0x01 
#define	TH_SYN	0x02 
#define	TH_RST	0x04 
#define	TH_PUSH	0x08 
#define	TH_ACK	0x10 
#define	TH_URG	0x20 
 
typedef struct _TCPHeader 
{ 
	USHORT	sourcePort;			// Source Port 
	USHORT	destinationPort;	// Destination Port 
	ULONG	nSequence;			// Sequence number 
	ULONG	nAck;				// Acknowledgement number 
 
	UCHAR	unused:4;			// Unused 
	UCHAR	offset:4;			// Data offset 
	UCHAR	flags;				// Flags 
 
	USHORT	window;				// Window size 
	USHORT	checksum;			// Checksum 
	USHORT	urp;				// Urgent Pointer 
}TCPHeader, *PTCPHeader; 
 
#pragma pack() 
 
#endif