Unit IPv6
From Ultibo.org
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Contents
Description
Ultibo IPv6 (Internet Protocol Version 6) unit
Constants
IPv6 specific constants
IP6_TRANSPORT_* IP6_TRANSPORT_NAME = 'IPV6';
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IPv6 header
IP6_HEADER_* MIN_IP6_PACKET = 40;
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Not Counting Adapter Header |
MAX_IP6_PACKET = 1500;
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Not Counting Adapter Header |
MAX_FRAG_LIFE = 32000;
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Only wait 32 seconds for the rest of the packet |
IP6_HEADER_SIZE = 40;
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SizeOf(TIP6Header); Does Not Allow for Extensions |
IPv6 extension header
IP6_HEADER_* | See: https://en.wikipedia.org/wiki/List_of_IP_protocol_numbers | |
IP6_HEADER_HOP = 0;
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Hop-by-hop option header |
IP6_HEADER_TCP = 6;
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Next header is a TCP segment (The payload) |
IP6_HEADER_UDP = 17;
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Next header is a UDP message (The payload) |
IP6_HEADER_IPV6 = 41;
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Next header is a IPv6 packet (IPv6 Encapsulation) (The payload) |
IP6_HEADER_ROUTING = 43;
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Next header is a Routing header |
IP6_HEADER_FRAGMENT = 44;
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Next header is a Fragmentation/reassembly header |
IP6_HEADER_GRE = 47;
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Next header is a GRE header |
IP6_HEADER_ESP = 50;
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Next header is a Encapsulating security payload |
IP6_HEADER_AUTH = 51;
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Next header is a Authentication header |
IP6_HEADER_ICMP = 58;
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Next header is a ICMP for IPv6 message |
IP6_HEADER_NONE = 59;
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There is no next header (Do not process payload) |
IP6_HEADER_DEST = 60;
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Next header is a Destination options header |
IP6_HEADER_SCTP = 132;
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Next header is a SCTP message (The payload) |
IP6_HEADER_MOBILITY = 135;
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Next header is a Mobility header |
IP6_MTU = MAX_IP6_PACKET;
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Type definitions
IPv6 header
PIP6Header = ^TIP6Header;
TIP6Header = packed record
| Note: 40 Bytes | |
VersionClassLabel:LongWord;
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Version (4 bits)(Always 6)/Traffic Class (8 bits)/Flow Label (20 bits) |
PayloadLength:Word;
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The size of the payload in octets, including any extension headers (The length is set to zero when a Hop-by-Hop extension header carries a Jumbo Payload option) |
NextHeader:Byte;
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Specifies the type of the next header (When extension headers are present in the packet this field indicates which extension header follows) |
HopLimit:Byte;
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This value is decremented by one at each intermediate node visited by the packet. When the counter reaches 0 the packet is discarded (Replaces the time to live field of IPv4) |
SourceIP:TIn6Addr;
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Source IP |
DestIP:TIn6Addr;
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Destination IP |
IPv6 extension header
PIP6ExtensionHeader = ^TIP6ExtensionHeader;
TIP6ExtensionHeader = packed record
| Note: 2 Bytes (Common Header of all Extension Headers) | |
NextHeader:Byte;
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Specifies the type of the next header (If zero discard the packet) |
ExtensionLength:Byte;
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IPv6 pseudo
PIP6Pseudo = ^TIP6Pseudo;
TIP6Pseudo = packed record
| Note: ?? Bytes (Used by UDP/TCP Checksum) | |
SourceIP:TIn6Addr;
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Source IP |
DestIP:TIn6Addr;
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Destination IP |
Mbz:Byte;
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Must Be Zero |
Protocol:Byte;
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IP6 Protocol Type IPPROTO_UDP, IPPROTO_TCP etc |
Length:Word;
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Length of UDP/TCP Header and Data |
IPv6 fragment
PIP6Fragment = ^TIP6Fragment;
TIP6Fragment = record
| Note: ?? Bytes (Used by Fragment Buffer) | |
Offset:LongWord;
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Offset of this Fragment in the Packet |
Size:Word;
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Size of this Fragment |
Prev:PIP6Fragment;
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Pointer to Prev Fragment |
Next:PIP6Fragment;
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Pointer to Next Fragment |
IPv6 packet
PIP6Packet = ^TIP6Packet;
TIP6Packet = record
| Note: ?? Bytes (Used by Fragment Buffer) | |
Lock:TMutexHandle;
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Packet Lock |
Id:LongWord;
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IP6 Id |
Dest:TIn6Addr;
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IP6 Dest |
Source:TIn6Addr;
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IP6 Source |
Data:Pointer;
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Pointer to Data |
Timeout:Int64;
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Packet Timeout |
Total:Word;
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IP Total Length |
Length:Word;
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IP Header Length |
Received:Word;
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Received Bytes |
Prev:PIP6Packet;
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Pointer to Prev Packet |
Next:PIP6Packet;
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Pointer to Next Packet |
First:PIP6Fragment;
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Pointer to First Fragment |
Last:PIP6Fragment;
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Pointer to Last Fragment |
Class definitions
IPv6 specific classes
TIP6Buffer = class(TTransportBufferEx)
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TIP6TransportAdapter = class(TTransportAdapter)
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TIP6TransportBinding = class(TTransportBinding)
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TIP6TransportProtocol = class(TTransportProtocol)
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TIP6TransportFilter = class(TTransportFilter)
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TIP6TransportConfig = class(TTransportConfig)
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TIP6Transport = class(TNetworkTransport)
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TIP6State = class(TTransportState)
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TIP6Options = class(TTransportOptions)
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TIP6HostEntry = class(THostEntry)
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TIP6RouteEntry = class(TRouteEntry)
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TIP6AddressEntry = class(TAddressEntry)
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TIP6NetworkEntry = class(TNetworkEntry)
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TIP6ServEntry = class(TServEntry)
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TIP6ProtoEntry = class(TProtoEntry)
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Public variables
None defined
Function declarations
Initialization functions
procedure IP6Init;
Description: To be documented
| Note | None documented |
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IPv6 functions
function CheckIP6(ABuffer:Pointer):Boolean;
Description: Verify that the packet is a valid IP6 packet
| Buffer | Complete packet without Adapter header |
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function GetIP6Protocol(ABuffer:Pointer):Byte;
Description: To be documented
| Buffer | Complete packet including Transport header |
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function GetIP6HeaderOffset(ABuffer:Pointer):Word;
Description: Return Start of the IP6 Header (Start of Packet)
| Buffer | Complete packet including Transport header |
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function GetIP6HeaderLength(ABuffer:Pointer):Word;
Description: Return Size of IP6 Header (Including Options)
| Buffer | Complete packet including Transport header |
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function GetIP6DataOffset(ABuffer:Pointer):Word;
Description: Return Start of IP6 Packet Data (Length of IP6 Header)
| Buffer | Complete packet including Transport header |
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function GetIP6DataLength(ABuffer:Pointer):Word;
Description: Return Size of IP6 Packet Data (IP6 TotalLength - IP6 Header)
| Buffer | Complete packet including Transport header |
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function ChecksumIP6(ABuffer:Pointer; AOffset,ALength:Word):Word;
Description: Validate the IP6 Header and Options Checksum on Receive
| Buffer | Complete packet including Transport header |
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