300 lines
7.3 KiB
C
300 lines
7.3 KiB
C
/*++
|
|
|
|
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_
|