/*++
Copyright (c) 1997 Microsoft Corporation
File:
prot.h
Abstract:
This module contains Internet protocol-related declarations.
Author:
Abolade Gbadegesin (t-abolag) 21-July-1997
Revision History:
--*/
#ifndef _NAT_PROT_H_
#define _NAT_PROT_H_
//
// NBT constants
//
#define NBT_DATAGRAM_PORT 138
#define NBT_NAME_LENGTH 34
#define NBT_MESSAGE_DIRECT_UNIQUE 0x10
#define NBT_MESSAGE_DIRECT_GROUP 0x11
#define NBT_FLAG_FIRST_FRAGMENT 0x02
//
// PPTP constants
//
#define PPTP_CONTROL_PORT 1723
#define PPTP_GRE_PROTOCOL 0x880B
//
// IPSec constants
//
#define IPSEC_ISAKMP_PORT 500
//
// DHCP constants
//
#define DHCP_SERVER_PORT 67
#define DHCP_CLIENT_PORT 68
//
// ICMP message-type constants
//
#define ICMP_ECHO_REPLY 0
#define ICMP_DEST_UNREACH 3
#define ICMP_SOURCE_QUENCH 4
#define ICMP_REDIRECT 5
#define ICMP_ECHO_REQUEST 8
#define ICMP_ROUTER_REPLY 9
#define ICMP_ROUTER_REQUEST 10
#define ICMP_TIME_EXCEED 11
#define ICMP_PARAM_PROBLEM 12
#define ICMP_TIMESTAMP_REQUEST 13
#define ICMP_TIMESTAMP_REPLY 14
#define ICMP_MASK_REQUEST 17
#define ICMP_MASK_REPLY 18
//
// ICMP message-code constants
//
#define ICMP_CODE_NET_UNREACH 0
#define ICMP_CODE_HOST_UNREACH 1
#define ICMP_CODE_PROTOCOL_UNREACH 2
#define ICMP_CODE_PORT_UNREACH 3
#define ICMP_CODE_FRAG_NEEDED 4
#define ICMP_SOURCE_ROUTE_FAILED 5
//
// Macro for extracting the data-offset from the field IPHeader.verlen
//
#define IP_DATA_OFFSET(h) \
((ULONG)((((PIP_HEADER)(h))->VersionAndHeaderLength & 0x0F) << 2))
//
// Mask for extracting the fragment-offset from the IPHeader structure's
// combined flags/fragment-offset field
//
#define IP_FRAGMENT_OFFSET_MASK ~0x00E0
//
// Value of the Don't Fragment bit w/in the IPHeader structure's combined
// flags/fragment-offset field.
//
#define IP_DF_FLAG 0x0040
//
// Macro for extracting the data-offset from the field TCP_HEADER.OffsetAndFlags
// The offset is in 32-bit words, so shifting by 2 gives the value in bytes.
//
#define TCP_DATA_OFFSET(h) (((h)->OffsetAndFlags & 0x00F0) >> 2)
//
// Masks for extracting flags from the field TCP_HEADER.OffsetAndFlags
//
#define TCP_FLAG_FIN 0x0100
#define TCP_FLAG_SYN 0x0200
#define TCP_FLAG_RST 0x0400
#define TCP_FLAG_PSH 0x0800
#define TCP_FLAG_ACK 0x1000
#define TCP_FLAG_URG 0x2000
#define TCP_FLAG(h,f) ((h)->OffsetAndFlags & TCP_FLAG_ ## f)
#define TCP_ALL_FLAGS(h) ((h)->OffsetAndFlags & 0x3f00)
#define TCP_RESERVED_BITS(h) ((h)->OffsetAndFlags & 0xc00f)
//
// TCP Option Opcodes
//
#define TCP_OPTION_ENDOFOPTIONS ( 0 )
#define TCP_OPTION_NOP ( 1 )
#define TCP_OPTION_MSS ( 2 )
#define TCP_OPTION_WSCALE ( 3 )
#define TCP_OPTION_SACK_PERMITTED ( 4 )
#define TCP_OPTION_SACK ( 5 )
#define TCP_OPTION_TIMESTAMPS ( 8 )
//
// Length Definitions for TCP Options
//
#define MSS_OPTION_SIZE ( 4 )
#define WS_OPTION_SIZE ( 3 )
#define TS_OPTION_SIZE ( 10 )
#define SP_OPTION_SIZE ( 2 )
//
// Maximum MSS value based on the MTU of the sending interface
//
#define MAX_MSSOPTION(m) ((m)>0 ? (m) - sizeof(TCP_HEADER) - sizeof(IP_HEADER):0)
#include <packon.h>
typedef struct _IP_HEADER {
UCHAR VersionAndHeaderLength;
UCHAR TypeOfService;
USHORT TotalLength;
USHORT Identification;
USHORT OffsetAndFlags;
UCHAR TimeToLive;
UCHAR Protocol;
USHORT Checksum;
ULONG SourceAddress;
ULONG DestinationAddress;
} IP_HEADER, *PIP_HEADER;
typedef struct _TCP_HEADER {
USHORT SourcePort;
USHORT DestinationPort;
ULONG SequenceNumber;
ULONG AckNumber;
USHORT OffsetAndFlags;
USHORT WindowSize;
USHORT Checksum;
USHORT UrgentPointer;
} TCP_HEADER, *PTCP_HEADER;
typedef struct _TCP_MSS_OPTION {
BYTE OptionType;
BYTE OptionLen;
USHORT MSSValue;
} MSSOption, *PMSSOption;
typedef struct _UDP_HEADER {
USHORT SourcePort;
USHORT DestinationPort;
USHORT Length;
USHORT Checksum;
} UDP_HEADER, *PUDP_HEADER;
typedef struct _ICMP_HEADER {
UCHAR Type;
UCHAR Code;
USHORT Checksum;
USHORT Identifier; // valid only for ICMP request/reply
USHORT SequenceNumber; // valid only for ICMP request/reply
IP_HEADER EncapsulatedIpHeader; // valid only for ICMP errors
union {
struct _ENCAPSULATED_TCP_HEADER {
USHORT SourcePort;
USHORT DestinationPort;
ULONG SequenceNumber;
} EncapsulatedTcpHeader;
struct _ENCAPSULATED_UDP_HEADER {
USHORT SourcePort;
USHORT DestinationPort;
USHORT Length;
USHORT Checksum;
} EncapsulatedUdpHeader;
struct _ENCAPSULATED_ICMP_HEADER {
UCHAR Type;
UCHAR Code;
USHORT Checksum;
USHORT Identifier;
USHORT SequenceNumber;
} EncapsulatedIcmpHeader;
};
} ICMP_HEADER, *PICMP_HEADER;
typedef struct _PPTP_HEADER {
USHORT PacketLength;
USHORT PacketType;
ULONG MagicCookie;
USHORT MessageType;
USHORT Reserved;
USHORT CallId; // may be sender ID or peer ID
USHORT PeerCallId;
} PPTP_HEADER, *PPPTP_HEADER;
#define PPTP_MAGIC_COOKIE 0x4D3C2B1A // network byte order
#define PPTP_OUTGOING_CALL_REQUEST 7
#define PPTP_OUTGOING_CALL_REPLY 8
#define PPTP_INCOMING_CALL_REQUEST 9
#define PPTP_INCOMING_CALL_REPLY 10
#define PPTP_INCOMING_CALL_CONNECTED 11
#define PPTP_CALL_CLEAR_REQUEST 12
#define PPTP_CALL_DISCONNECT_NOTIFY 13
#define PPTP_WAN_ERROR_NOTIFY 14
#define PPTP_SET_LINK_INFO 15
typedef struct _GRE_HEADER {
USHORT FlagsAndVersion;
USHORT ProtocolType;
USHORT PayloadLength;
USHORT CallId;
ULONG SequenceNumber;
ULONG AckNumber;
} GRE_HEADER, *PGRE_HEADER;
typedef struct _NBT_HEADER {
UCHAR MessageType;
UCHAR Flags;
USHORT DatagramId;
ULONG SourceAddress;
USHORT SourcePort;
USHORT DatagramLength;
USHORT PacketOffset;
UCHAR SourceName[NBT_NAME_LENGTH];
UCHAR DestinationName[NBT_NAME_LENGTH];
} NBT_HEADER, *PNBT_HEADER;
#include <packoff.h>
//
// IP address class-mask definitions
//
#define CLASS_MASK_A 0x000000ff
#define CLASS_MASK_B 0x0000ffff
#define CLASS_MASK_C 0x00ffffff
#define CLASS_MASK_D 0x000000e0
#define CLASS_MASK_E 0xffffffff
#define ADDRESS_CLASS_A(a) (((*((PBYTE)&(a))) & 0x80) == 0)
#define ADDRESS_CLASS_B(a) (((*((PBYTE)&(a))) & 0xc0) == 0x80)
#define ADDRESS_CLASS_C(a) (((*((PBYTE)&(a))) & 0xe0) == 0xc0)
#define ADDRESS_CLASS_D(a) (((*((PBYTE)&(a))) & 0xf0) == 0xe0)
#define ADDRESS_CLASS_E(a) ((((*((PBYTE)&(a)))& 0xf0) == 0xf0) && \
((a) != 0xffffffff))
#define GET_CLASS_MASK(a) \
(ADDRESS_CLASS_A(a) ? CLASS_MASK_A: \
(ADDRESS_CLASS_B(a) ? CLASS_MASK_B: \
(ADDRESS_CLASS_C(a) ? CLASS_MASK_C : \
(ADDRESS_CLASS_D(a) ? CLASS_MASK_D : CLASS_MASK_E))))
#endif // _NAT_PROT_H_