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Description
Ultibo ICMPv6 (Internet Control Message Protocol version 6) unit
To be documented
Constants
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ICMPv6 protocol ICMP6_PROTOCOL_*
| Note: Some ICMPV6 definitions are in the Protocol or IPv6 modules
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ICMP6_PROTOCOL_NAME = 'ICMPV6';
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ICMPv6 specific constants ICMP6_*
ICMP6_TIMEOUT = 0;
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Wait forever on a ICMP6 Read
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ICMP6_BUFFER_SIZE = 65536;
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ICMP6 Receive Buffer Size
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ICMP6_HEADER_SIZE = 5;
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SizeOf(TICMP6Header);
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ICMP6_PACKET_SIZE = 8;
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SizeOf(TICMP6Packet)
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Type definitions
ICMPv6 header
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PICMP6Header = ^TICMP6Header;
TICMP6Header = packed record
| Note: Some ICMPv6 definitions are in the Protocol or IPv6 modules
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ICMP6Type:Byte;
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ICMP_UNREACH etc
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Code:Byte;
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ICMP_UNREACH_NET,ICMP_UNREACH_PORT etc
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Checksum:Word;
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1s Compliment checksum of Structure
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CurrentHopLimit:Byte;
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ICMPv6 packet
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PICMP6Packet = ^TICMP6Packet;
TICMP6Packet = record
| Note: 8 Bytes (Used by ICMP6Buffer)
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Size:LongWord;
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LongWord to keep size even
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Next:PICMP6Packet;
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Followed by RemoteAddress (4 or 16 Bytes)
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Class definitions
ICMPv6 protocol transport
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TICMP6ProtocolTransport = class(TProtocolTransport)
constructor Create;
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destructor Destroy; override;
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public
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Socket:TICMP6Socket;
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Socket for sending replies
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ICMPv6 protocol
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TICMP6Protocol = class(TNetworkProtocol)
constructor Create(AManager:TProtocolManager; const AName:String);
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destructor Destroy; override;
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private
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FNextICMP6Id:Word;
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FNextICMP6Lock:TMutexHandle;
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function PacketHandler(AHandle:THandle; ASource,ADest,APacket:Pointer; ASize:Integer; ABroadcast:Boolean):Boolean;
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function ControlHandler(AHandle:THandle; ASource,ADest:Pointer; AProtocol,ACommand,ACode:Word; AAddress,AData:Pointer; ASize:Integer):Boolean;
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function GetNextICMP6Id(AIncrement:Boolean):Word;
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protected
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function SelectCheck(ASource,ADest:PFDSet; ACode:Integer):Integer; override;
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function SelectWait(ASocket:TProtocolSocket; ACode:Integer; ATimeout:LongWord):Integer; override;
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function SendPacket(ASocket:TProtocolSocket; ASource,ADest:Pointer; ASourcePort,ADestPort:Word; APacket:PPacketFragment; ASize,AFlags:Integer):Integer; override;
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public
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function Accept(ASocket:TProtocolSocket; ASockAddr:PSockAddr; AAddrLength:PInteger):TProtocolSocket; override;
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function Bind(ASocket:TProtocolSocket; var ASockAddr:TSockAddr; AAddrLength:Integer):Integer; override;
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function CloseSocket(ASocket:TProtocolSocket):Integer; override;
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function Connect(ASocket:TProtocolSocket; var ASockAddr:TSockAddr; AAddrLength:Integer):Integer; override;
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function IoctlSocket(ASocket:TProtocolSocket; ACmd:DWORD; var AArg:u_long):Integer; override;
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function GetPeerName(ASocket:TProtocolSocket; var ASockAddr:TSockAddr; var AAddrLength:Integer):Integer; override;
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function GetSockName(ASocket:TProtocolSocket; var ASockAddr:TSockAddr; var AAddrLength:Integer):Integer; override;
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function GetSockOpt(ASocket:TProtocolSocket; ALevel,AOptName:Integer; AOptValue:PChar; var AOptLength:Integer):Integer; override;
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function Listen(ASocket:TProtocolSocket; ABacklog:Integer):Integer; override;
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function Recv(ASocket:TProtocolSocket; var ABuffer; ALength,AFlags:Integer):Integer; override;
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function RecvFrom(ASocket:TProtocolSocket; var ABuffer; ALength,AFlags:Integer; var AFromAddr:TSockAddr; var AFromLength:Integer):Integer; override;
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function Select(ANfds:Integer; AReadfds,AWritefds,AExceptfds:PFDSet; ATimeout:PTimeVal):LongInt; override;
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function Send(ASocket:TProtocolSocket; var ABuffer; ALength,AFlags:Integer):Integer; override;
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function SendTo(ASocket:TProtocolSocket; var ABuffer; ALength,AFlags:Integer; var AToAddr:TSockAddr; AToLength:Integer):Integer; override;
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function SetSockOpt(ASocket:TProtocolSocket; ALevel,AOptName:Integer; AOptValue:PChar; AOptLength:Integer):Integer; override;
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function Shutdown(ASocket:TProtocolSocket; AHow:Integer):Integer; override;
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function Socket(AFamily,AStruct,AProtocol:Integer):TProtocolSocket; override;
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function AddTransport(ATransport:TNetworkTransport):Boolean; override;
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function RemoveTransport(ATransport:TNetworkTransport):Boolean; override;
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function FindSocket(AFamily,AStruct,AProtocol:Word; ALocalAddress,ARemoteAddress:Pointer; ALocalPort,ARemotePort:Word; ABroadcast,AListen,ALock:Boolean; AState:LongWord):TProtocolSocket; override;
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procedure FlushSockets(All:Boolean); override;
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function StartProtocol:Boolean; override;
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function StopProtocol:Boolean; override;
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function ProcessProtocol:Boolean; override;
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ICMPv6 socket
[Expand]
TICMP6Socket = class(TProtocolSocket)
| Note: SOCK_RAW
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constructor Create(AProtocol:TNetworkProtocol; ATransport:TNetworkTransport);
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destructor Destroy; override;
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private
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FRecvData:TICMP6Buffer;
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public
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property RecvData:TICMP6Buffer read FRecvData;
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function IoCtl(ACommand:DWORD; var AArgument:u_long):Integer; override;
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function IsConnected(ALocalAddress,ARemoteAddress:Pointer; ALocalPort,ARemotePort:Word; ABroadcast:Boolean):Boolean; override;
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function IsListening(ALocalAddress,ARemoteAddress:Pointer; ALocalPort,ARemotePort:Word; ABroadcast:Boolean):Boolean; override;
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ICMPv6 buffer
[Expand]
TICMP6Buffer = class(TSocketBuffer)
constructor Create(ASocket:TTransportSocket);
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destructor Destroy; override;
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private
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FOffset:Word;
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Offset to RemoteAddress
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FLength:Word;
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Length of RemoteAddress
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FRead:Pointer;
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Pointer to Next Read from Buffer
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FWrite:Pointer;
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Pointer to Next Write to Buffer
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FCount:LongWord;
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Number of Packets in Buffer
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FFirst:PICMP6Packet;
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Pointer to First Packet
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FLast:PICMP6Packet;
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Pointer to Last Packet
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function AddPacket(ASize:Integer):Boolean;
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function RemovePacket:Boolean;
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procedure FlushPackets;
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protected
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procedure SetSize(ASize:LongWord); override;
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public
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function GetNext:Integer;
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function GetCount:LongWord;
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function ReadBuffer(var ABuffer; var ASize:Integer; ARemoteAddress:Pointer; AFlags:Integer):Boolean;
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function WriteBuffer(var ABuffer; ASize:Integer; ARemoteAddress:Pointer):Boolean;
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Public variables
None defined
Function declarations
Initialization functions
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procedure ICMP6Init;
Description: To be documented
ICMPv6 functions
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function CheckICMP6(AFamily:Word; ABuffer:Pointer):Boolean;
Description: Verify that the packet is a valid ICMP6 packet
| Buffer
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The complete packet including Transport header
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function GetICMP6HeaderOffset(AFamily:Word; ABuffer:Pointer):Word;
Description: To be documented
| Buffer
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The complete packet including Transport header
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function GetICMP6HeaderLength(AFamily:Word; ABuffer:Pointer):Word;
Description: To be documented
| Buffer
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The complete packet including Transport header
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function GetICMP6DataOffset(AFamily:Word; ABuffer:Pointer):Word;
Description: To be documented
| Buffer
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The complete packet including Transport header
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function GetICMP6DataLength(AFamily:Word; ABuffer:Pointer):Word;
Description: To be documented
| Buffer
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The complete packet including Transport header
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function ChecksumICMP6(AFamily:Word; ABuffer:Pointer; AOffset,ALength:Word):Word;
Description: Checksum the ICMP6 Header on Send/Validate the Checksum on Receive
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