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