www.pudn.com > IPsec_Src_Instal.rar > PktHdr.h

//****************************************************************************// 
//*                                                                           // 
//* Copyright (C) 2003, James Antognini, antognini@mindspring.com.            // 
//*                                                                           // 
//****************************************************************************// 
 
/* 
	Copyright © 2003 Printing Communications Associates, Inc. (PCAUSA) 
 
	The right to use this code in your own derivative works is granted so long as 
	1.	Your own derivative works include significant modifications of your own.  
	2.	You retain the above copyright notices and this paragraph in its  
		entirety within sources derived from this code.  
	 
	This product includes software developed by PCAUSA. The name of  
	PCAUSA may not be used to endorse or promote products derived 
	from this software without specific prior written permission. 
 
	THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, 
	INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY  
	AND FITNESS FOR A PARTICULAR PURPOSE. 
*/ 
 
#define     ETH_HEADER_SIZE             14 
#define     ETH_MAX_DATA_SIZE           1500 
#define     ETH_MAX_PACKET_SIZE         ETH_HEADER_SIZE + ETH_MAX_DATA_SIZE 
#define     ETH_MIN_PACKET_SIZE         60 
 
#define lnEthHdr    14      // Size of Ethernet header.            
#define lnIPHdr     20      // Size of IP header.                  
#define lnTCPHdrMin 20      // Minimum size of TCP header.         
 
typedef enum 
{ 
   EthHTypeIP   = 0x0800, 
   EthHTypeARP  = 0x0806, 
   EthHTypeRARP = 0x8035 
} 
EthHType; 
 
typedef struct _EthHdr 
{ 
 
	char	DestMAC[6]; 
	char	SrcMAC[6]; 
	USHORT	Type;			//0x0800=>IP 
 
}EthHdr, *pEthHdr; 
 
 
typedef	struct _IPHdr 
{ 
	union 
	{ 
		UCHAR	HdrLenVer; 
		struct 
		{ 
			UCHAR	IPHdrLen	:	4; 
			UCHAR	IPVer		:	4; 
		}; 
 
	}; 
 
	UCHAR	TypeOfService; 
	USHORT	TotalLength; 
	USHORT	Identification; 
 
	union 
	{ 
		USHORT	FragmentationSummary; 
 
		struct 
		{ 
			USHORT   FragmentOffset1  : 5; 
			USHORT   LastFragment     : 1; 
			USHORT   CannotFragment   : 1; 
			USHORT   padding          : 1;               // Reserved, must be zero. 
			USHORT   FragmentOffset2  : 8; 
		}; 
	}; 
	 
	UCHAR          TTL; 
	UCHAR          Protocol; 
	USHORT         Checksum; 
	ULONG          SourceAddress; 
	ULONG          DestinationAddress; 
 
}IPHdr, *pIPHdr; 
 
 
 
typedef struct _TCPHdr 
{ 
	USHORT         SrcPort; 
	USHORT         DestPort; 
	ULONG          SeqNbr; 
	ULONG          AckNbr; 
 
	union 
	{ 
		UCHAR       OffsetReserved;           
		struct 
        { 
			UCHAR    Reserved         : 4; 
			UCHAR    DataOffset       : 4;                
        }; 
	}; 
 
	union 
	{ 
		UCHAR       Flags; 
		struct 
        { 
			UCHAR    EndOfData        : 1; 
			UCHAR    Synchronize      : 1; 
			UCHAR    Reset            : 1; 
			UCHAR    PushFunction     : 1; 
			UCHAR    AckFdSignificant : 1; 
			UCHAR    UrgentData       : 1; 
        }; 
	}; 
	 
	USHORT         Window; 
	USHORT         Checksum; 
	USHORT         UrgentPtr; 
 
}TCPHdr, *pTCPHdr; 
 
 
typedef struct _AHHdr 
{ 
 
	UCHAR	NextHeader; 
	UCHAR	PayloadLength; 
	USHORT	Reserved; 
	ULONG	SPI; 
	ULONG	SNF; 
	 
	UCHAR	Auth[16]; 
 
//	ULONG	NewVa; 
//	ULONG	OrigVa; 
}AHHdr, * pAHHdr; 
 
/* 
 * Protocols 
 */ 
#define IPPROTO_IP              0               /* dummy for IP */ 
#define IPPROTO_ICMP            1               /* control message protocol */ 
#define IPPROTO_IGMP            2               /* internet group management protocol */ 
#define IPPROTO_GGP             3               /* gateway^2 (deprecated) */ 
#define IPPROTO_TCP             6               /* tcp */ 
#define IPPROTO_PUP             12              /* pup */ 
#define IPPROTO_UDP             17              /* user datagram protocol */ 
#define IPPROTO_IDP             22              /* xns idp */ 
#define IPPROTO_IPV6            41              /* IPv6 */ 
#define IPPROTO_ND              77              /* UNOFFICIAL net disk proto */ 
#define IPPROTO_ICLFXBM         78 
 
#define IPPROTO_RAW             255             /* raw IP packet */ 
#define IPPROTO_MAX             256 
 
 
VOID 
GetPktPayload( 
              PNDIS_PACKET     pPacket,               // Address of packet descriptor. 
              PUCHAR           pOutBfr,               // Address of output buffer, to get copied packet payload. 
              ULONG            ulOutBfrAvail,         // Size of output buffer. 
              PULONG           pUlBytesCopied         // Output variable for number of bytes copied. 
             ); 
 
USHORT 
GetIPChecksum(PUSHORT IPH, USHORT IPHdr); 
 
 
 
NDIS_STATUS		PPBuildOrigPkt( 
								PUCHAR   pPayload,                     // Address of current (encapsulated) payload. 
								ULONG	 OrigPayloadl, 
								PUCHAR * pUnencPayload,                // Address of variable to hold new payload address. 
								PULONG   pUnencPayloadLn               // Address of variable to hold new payload length. 
								);