TIPTransport

Return to Unit IP

Description

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To be documented

Class definitions

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TIPTransport = class(TNetworkTransport)

constructor Create(AManager:TTransportManager; const AName:String);
destructor Destroy; override;
private
FNextIPId:Word;
FNextIPLock:TMutexHandle;
FARP:TARPTransport;
FRARP:TRARPTransport;
FFragments:TIPBuffer;
FHosts:TNetworkList;
FServs:TNetworkList;
FProtos:TNetworkList;
FRoutes:TNetworkList;
FNetworks:TNetworkList;
FAddresses:TNetworkList;
FNameservers:TIPNameservers;	(Part of TNetworkList)
FNameserverLock:TMutexHandle;
FForwarding:LongWord;
FDefaultTTL:LongWord;
FAutoRelease:Boolean;
function PacketHandler(AHandle:THandle; ASource,ADest,APacket:Pointer; ASize:Integer; ABroadcast:Boolean):Boolean;
function FragmentHandler(ASource,ADest,APacket:Pointer; ASize:Integer; ABroadcast:Boolean):Boolean;
function CheckFragment(ABuffer:Pointer):Boolean;
function GetNextIPId(AIncrement:Boolean):Word;
function GetIPNameserver(ACount:LongWord):TInAddr;
function GetAdapterConfigType(const AName:String):Word;
function GetAdapterConfigAddress(const AName:String):TInAddr;
function GetAdapterConfigNetmask(const AName:String):TInAddr;
function GetAdapterConfigGateway(const AName:String):TInAddr;
function GetAdapterConfigServer(const AName:String):TInAddr;
protected
function FilterPacket(ASource,ADest,APacket:Pointer; ASize:Integer; ABroadcast:Boolean):Boolean; override;
function ForwardPacket(AAdapter:TTransportAdapter; ASource,ADest,APacket:Pointer; ASize:Integer; ABroadcast:Boolean):Boolean; override;
public
property Nameservers:TIPNameservers read FNameservers;
property Forwarding:LongWord read FForwarding write FForwarding;
property DefaultTTL:LongWord read FDefaultTTL write FDefaultTTL;
property AutoRelease:Boolean read FAutoRelease write FAutoRelease;
function AddAdapter(AAdapter:TNetworkAdapter; AConfigType:Word; AAddress,ANetmask,AGateway,AServer:Pointer):Boolean; override;
function RemoveAdapter(AAdapter:TNetworkAdapter):Boolean; override;
function AddProtocol(AProtocol:Word; APacketHandler:TTransportPacketHandler; AControlHandler:TTransportControlHandler):THandle; override;
function RemoveProtocol(AHandle:THandle; AProtocol:Word):Boolean; override;
function AddFilter(AProtocol:Word; AFilterHandler:TTransportFilterHandler):THandle; override;
function RemoveFilter(AHandle:THandle; AProtocol:Word):Boolean; override;
function AddConfig(AConfigType:Word; AConfigAuto:Boolean; AConfigHandler:TTransportConfigHandler):THandle; override;
function RemoveConfig(AHandle:THandle; AConfigType:Word):Boolean; override;
function SendPacket(ASocket:TTransportSocket; ASource,ADest:Pointer; APacket:PPacketFragment; ASize,AFlags:Integer):Integer; override;
function SendControl(ASource,ADest:Pointer; AProtocol,ACommand,ACode:Word; AAddress,AData:Pointer; ASize:Integer):Boolean; override;
function GetSockOpt(ASocket:TTransportSocket; ALevel,AOptName:Integer; AOptValue:PChar; var AOptLength:Integer):Integer; override;
function SetSockOpt(ASocket:TTransportSocket; ALevel,AOptName:Integer; AOptValue:PChar; AOptLength:Integer):Integer; override;
function StartTransport:Boolean; override;
function StopTransport:Boolean; override;
function ProcessTransport:Boolean; override;
function BindTransport(AAdapter:TNetworkAdapter):Boolean; override;
function UnbindTransport(AAdapter:TNetworkAdapter):Boolean; override;
function AddNameserver(const AAddress:TInAddr):Boolean;
function RemoveNameserver(const AAddress:TInAddr):Boolean;
function GetHostByName(const AName:String; ALock:Boolean):TIPHostEntry;
function GetHostByAddress(const AAddress:TInAddr; ALock:Boolean):TIPHostEntry;
function GetHostByNext(APrevious:TIPHostEntry; ALock,AUnlock:Boolean):TIPHostEntry;
function CheckHost(AHost:TIPHostEntry; ALock:Boolean):Boolean;
function AddHost(const AAddress:TInAddr; const AName:String; AType:Word; ALock:Boolean):TIPHostEntry;
function RemoveHost(const AAddress:TInAddr):Boolean;
procedure FlushHosts(All:Boolean);
function GetRouteByAddress(const AAddress:TInAddr; ALock:Boolean; AState:LongWord):TIPRouteEntry;
function GetRouteByNetwork(const ANetwork,AAddress:TInAddr; ALock:Boolean; AState:LongWord):TIPRouteEntry;
function GetRouteByNext(APrevious:TIPRouteEntry; ALock,AUnlock:Boolean; AState:LongWord):TIPRouteEntry;
function CheckRoute(ARoute:TIPRouteEntry; ALock:Boolean; AState:LongWord):Boolean;
function AddRoute(const ANetwork,ANetmask,AGateway,AAddress:TInAddr; AType:Word; ALock:Boolean; AState:LongWord):TIPRouteEntry;
function RemoveRoute(const ANetwork,AAddress:TInAddr):Boolean;
procedure FlushRoutes(All:Boolean);
function GetAddressByAddress(const AAddress:TInAddr; ALock:Boolean; AState:LongWord):TIPAddressEntry;
function GetAddressByNext(APrevious:TIPAddressEntry; ALock,AUnlock:Boolean; AState:LongWord):TIPAddressEntry;
function CheckAddress(AAddress:TIPAddressEntry; ALock:Boolean; AState:LongWord):Boolean;
function AddAddress(const AAddress:TInAddr; AAdapter:TNetworkAdapter; AType:Word; ALock:Boolean; AState:LongWord):TIPAddressEntry;
function RemoveAddress(const AAddress:TInAddr):Boolean;
procedure FlushAddresses(All:Boolean);
function GetNetworkByName(const AName:String; ALock:Boolean):TIPNetworkEntry;
function GetNetworkByAddress(const ANetwork:TInAddr; ALock:Boolean):TIPNetworkEntry;
function AddNetwork(const AName:String; const ANetwork:TInAddr; ALock:Boolean):TIPNetworkEntry;
function RemoveNetwork(const AName:String):Boolean;
function GetServByName(const AName,AProtocol:String; ALock:Boolean):TIPServEntry;
function GetServByPort(APort:Word; const AProtocol:String; ALock:Boolean):TIPServEntry;
function AddServ(const AName,AProtocol:String; APort:Word; ALock:Boolean):TIPServEntry;
function RemoveServ(const AName,AProtocol:String):Boolean;
function GetProtoByName(const AName:String; ALock:Boolean):TIPProtoEntry;
function GetProtoByNumber(ANumber:Word; ALock:Boolean):TIPProtoEntry;
function AddProto(const AName:String; ANumber:Word; ALock:Boolean):TIPProtoEntry;
function RemoveProto(const AName:String):Boolean;
function CompareLocal(const AAddress:TInAddr):Boolean;
function CompareDefault(const AAddress:TInAddr):Boolean;
function CompareLoopback(const AAddress:TInAddr):Boolean;
function CompareDirected(const AAddress:TInAddr):Boolean;
function CompareBroadcast(const AAddress:TInAddr):Boolean;
function CompareMulticast(const AAddress:TInAddr):Boolean;
function CompareAddress(const AAddress1,AAddress2:TInAddr):Boolean;
function CompareSubnet(const AAddress,ANetwork,ANetmask:TInAddr):Boolean;

Function declarations

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constructor TIPTransport.Create(AManager:TTransportManager; const AName:String);

Description: To be documented

Note	None documented

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destructor TIPTransport.Destroy;

Description: To be documented

Note	None documented

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function TIPTransport.PacketHandler(AHandle:THandle; ASource,ADest,APacket:Pointer; ASize:Integer; ABroadcast:Boolean):Boolean;

Description: Process a packet received by an Adapter

Handle	The Handle of the Transport Adapter the packet was received from
Source	The source hardware address of the received packet (Set by Adapter)
Dest	The destination hardware address of the received packet (Set by Adapter)
Packet	The received packet (The complete packet without Adapter header)
Size	The size of the received packet in bytes
Broadcast	True if the destination address is a broadcast address
Note	The first protocol handler to accept the packet causes processing to cease

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function TIPTransport.FragmentHandler(ASource,ADest,APacket:Pointer; ASize:Integer; ABroadcast:Boolean):Boolean;

Description: Process a received fragment by adding it to the buffer and if completed process the packet

Source	The source IP address of the received fragment (Set by Packet Handler)
Dest	The destination IP address of the received fragment (Set by Packet Handler)
Packet	The received fragment (The complete packet without Adapter header)
Size	The size of the received fragment in bytes
Broadcast	True if the destination address is a broadcast address

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function TIPTransport.CheckFragment(ABuffer:Pointer):Boolean;

Description: Check if a packet is a fragment and return True if it is

Buffer	The packet to check (The complete packet without Adapter header)

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function TIPTransport.GetNextIPId(AIncrement:Boolean):Word;

Description: Get the next IP packet id number

Increment	If True increment the next id

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function TIPTransport.GetIPNameserver(ACount:LongWord):TInAddr;

Description: Get the nameserver address from the network settings

Note	None documented

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function TIPTransport.GetAdapterConfigType(const AName:String):Word;

Description: Get the adapter config type from the network settings

Note	None documented

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function TIPTransport.GetAdapterConfigAddress(const AName:String):TInAddr;

Description: Get the adapter address from the network settings

Note	None documented

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function TIPTransport.GetAdapterConfigNetmask(const AName:String):TInAddr;

Description: Get the adapter netmask from the network settings

Note	None documented

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function TIPTransport.GetAdapterConfigGateway(const AName:String):TInAddr;

Description: Get the adapter gateway from the network settings

Note	None documented

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function TIPTransport.GetAdapterConfigServer(const AName:String):TInAddr;

Description: Get the adapter server from the network settings

Note	None documented

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function TIPTransport.FilterPacket(ASource,ADest,APacket:Pointer; ASize:Integer; ABroadcast:Boolean):Boolean;

Description: Filter a received packet

Source	The source IP address of the received fragment (Set by Packet or Fragment Handler)
Dest	The destination IP address of the received fragment (Set by Packet or Fragment Handler)
Packet	The received packet (The complete packet without Adapter header)
Size	The size of the received packet in bytes
Broadcast	True if the destination address is a broadcast address
Note	If Filter returns True the Packet should be discarded The first filter handler to reject the packet causes filtering to cease

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function TIPTransport.ForwardPacket(AAdapter:TTransportAdapter; ASource,ADest,APacket:Pointer; ASize:Integer; ABroadcast:Boolean):Boolean;

Description: Forward a received packet

Adapter	The adapter the packet was received on
Source	The source IP address of the received fragment (Set by Packet Handler)
Dest	The destination IP address of the received fragment (Set by Packet Handler)
Packet	The received packet (The complete packet without Adapter header)
Size	The size of the received packet in bytes
Broadcast	True if the destination address is a broadcast address
Note	Caller must hold Adapter lock

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function TIPTransport.AddAdapter(AAdapter:TNetworkAdapter; AConfigType:Word; AAddress,ANetmask,AGateway,AServer:Pointer):Boolean;

Description: Add an adapter to this transport

Adapter	The adapter to add
ConfigType	The configuration type to use for configuring the adapter (eg CONFIG_TYPE_AUTO)
Address	The transport address to use for this adapter (or nil if supplied during configuration)
Netmask	The transport netmask to use for this adapter (or nil if supplied during configuration)
Gateway	The transport default gateway to use for this adapter (or nil if supplied during configuration)
Server	The transport configuration server to use for this adapter (or nil if supplied during configuration)

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function TIPTransport.RemoveAdapter(AAdapter:TNetworkAdapter):Boolean;

Description: Remove an adapter from this transport

Adapter	The adapter to remove

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function TIPTransport.AddProtocol(AProtocol:Word; APacketHandler:TTransportPacketHandler; AControlHandler:TTransportControlHandler):THandle;

Description: Add a protocol to this transport

Protocol	The protocol type to add
PacketHandler	Packet handler to call on matching protocol type
ControlHandler	Control handler to call on error condition

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function TIPTransport.RemoveProtocol(AHandle:THandle; AProtocol:Word):Boolean;

Description: Remove a protocol from this transport

Handle	Handle of the protocol to remove
Protocol	The protocol type to remove

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function TIPTransport.AddFilter(AProtocol:Word; AFilterHandler:TTransportFilterHandler):THandle;

Description: Add a filter to this transport

Protocol	The protocol type of the filter to add
FilterHandler	Filter handler to call on matching protocol type

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function TIPTransport.RemoveFilter(AHandle:THandle; AProtocol:Word):Boolean;

Description: Remove a filter from this transport

Handle	Handle of the filter to remove
Protocol	The protocol type of the filter to remove

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function TIPTransport.AddConfig(AConfigType:Word; AConfigAuto:Boolean; AConfigHandler:TTransportConfigHandler):THandle;

Description: Add a config to this transport

ConfigType	The config type to add
ConfigAuto	True if this config supports auto configuration type
ConfigHandler	Config handler to call on matching config type

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function TIPTransport.RemoveConfig(AHandle:THandle; AConfigType:Word):Boolean;

Description: Remove a config from this transport

Handle	Handle of the config to remove
ConfigType	The config type to remove

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function TIPTransport.SendPacket(ASocket:TTransportSocket; ASource,ADest:Pointer; APacket:PPacketFragment; ASize,AFlags:Integer):Integer;

Description: Send a Packet by adding the Transport Header and other details to the Data

Socket	The socket to use for sending the packet
Source	The source IP address of the packet
Dest	The destination IP address of the packet
Packet	The packet data to send
Size	The size of the packet data in bytes
Flags	Any transport specific flags for sending
Note	Caller must hold the Socket lock

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function TIPTransport.SendControl(ASource,ADest:Pointer; AProtocol,ACommand,ACode:Word; AAddress,AData:Pointer; ASize:Integer):Boolean;

Description: To be documented

Note	The first control handler to accept the packet causes sending to cease

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function TIPTransport.GetSockOpt(ASocket:TTransportSocket; ALevel,AOptName:Integer; AOptValue:PChar; var AOptLength:Integer):Integer;

Description: BSD compatible Get Socket Option

Socket	The socket to get the option from
Level	The protocol level for the option
OptName	The name of the option to get
OptValue	The value of the option
OptLength	The length of the option
Note	Caller must hold the Socket lock

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function TIPTransport.SetSockOpt(ASocket:TTransportSocket; ALevel,AOptName:Integer; AOptValue:PChar; AOptLength:Integer):Integer;

Description: BSD compatible Set Socket Option

Socket	The socket to set the option for
Level	The protocol level for the option
OptName	The name of the option to set
OptValue	The value of the option
OptLength	The length of the option
Note	Caller must hold the Socket lock

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function TIPTransport.StartTransport:Boolean;

Description: Start this transport ready for sending and receiving

Note	None documented

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function TIPTransport.StopTransport:Boolean;

Description: Stop this transport ready for removal

Note	None documented

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function TIPTransport.ProcessTransport:Boolean;

Description: Process periodic tasks for this transport

Note	None documented

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function TIPTransport.BindTransport(AAdapter:TNetworkAdapter):Boolean;

Description: Bind this transport to an adapter if appropriate

Adapter	The adapter to bind to

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function TIPTransport.UnbindTransport(AAdapter:TNetworkAdapter):Boolean;

Description: Unbind this transport from an adapter if appropriate

Adapter	The adapter to unbind from

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function TIPTransport.AddNameserver(const AAddress:TInAddr):Boolean;

Description: Add a nameserver IP address to the list of available nameservers

Address	The IP address to add

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function TIPTransport.RemoveNameserver(const AAddress:TInAddr):Boolean;

Description: Remove a nameserver IP address from the list of available nameservers

Address	The IP address to remove

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function TIPTransport.GetHostByName(const AName:String; ALock:Boolean):TIPHostEntry;

Description: Find the name in the host cache

Name	The name to find
Lock	If True then lock the found entry before returning

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function TIPTransport.GetHostByAddress(const AAddress:TInAddr; ALock:Boolean):TIPHostEntry;

Description: Find the IP address in the host cache

Address	The IP address to find
Lock	If True then lock the found entry before returning

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function TIPTransport.GetHostByNext(APrevious:TIPHostEntry; ALock,AUnlock:Boolean):TIPHostEntry;

Description: To be documented

Note	None documented

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function TIPTransport.CheckHost(AHost:TIPHostEntry; ALock:Boolean):Boolean;

Description: Check a host entry in the host cache

Host	The host entry to check
Lock	If True then lock the found entry before returning
Note	This allows safely obtaining a lock on an existing object in case it has been freed

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function TIPTransport.AddHost(const AAddress:TInAddr; const AName:String; AType:Word; ALock:Boolean):TIPHostEntry;

Description: Add an IP address and name to the host cache

Address	The IP address of the entry to add
Name	The name of the entry to add
Type	The type of the added entry (eg HOST_TYPE_DYNAMIC)
Lock	If True then lock the added entry before returning

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function TIPTransport.RemoveHost(const AAddress:TInAddr):Boolean;

Description: Remove an IP address from the host cache

Address	The IP address to remove

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procedure TIPTransport.FlushHosts(All:Boolean);

Description: Flush hosts from the host cache

All	If True flush all hosts, otherwise flush expired hosts

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function TIPTransport.GetRouteByAddress(const AAddress:TInAddr; ALock:Boolean; AState:LongWord):TIPRouteEntry;

Description: Find the IP route in the route cache

Address	The IP address to find the route for
Lock	If True then lock the found entry before returning

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function TIPTransport.GetRouteByNetwork(const ANetwork,AAddress:TInAddr; ALock:Boolean; AState:LongWord):TIPRouteEntry;

Description: Find the IP network and address in the route cache

Network	The network address of the entry to find
Address	The IP address of the entry to find
Lock	If True then lock the found entry before returning

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function TIPTransport.GetRouteByNext(APrevious:TIPRouteEntry; ALock,AUnlock:Boolean; AState:LongWord):TIPRouteEntry;

Description: To be documented

Note	None documented

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function TIPTransport.CheckRoute(ARoute:TIPRouteEntry; ALock:Boolean; AState:LongWord):Boolean;

Description: Check a route entry in the route cache

Route	The route entry to check
Lock	If True then lock the found entry before returning
State	The lock type if Lock is True (NETWORK_LOCK_READ or NETWORK_LOCK_WRITE)
Note	This allows safely obtaining a lock on an existing object in case it has been freed

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function TIPTransport.AddRoute(const ANetwork,ANetmask,AGateway,AAddress:TInAddr; AType:Word; ALock:Boolean; AState:LongWord):TIPRouteEntry;

Description: Add an IP route to the route cache

Network	The network address of the entry to add
Netmask	The netmask of the entry to add
Gateway	The gateway of the entry to add
Address	The IP address of the entry to add
Type	The type of the added entry (eg ROUTE_TYPE_DYNAMIC)
Lock	If True then lock the added entry before returning

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function TIPTransport.RemoveRoute(const ANetwork,AAddress:TInAddr):Boolean;

Description: Remove an IP route from the route cache

Network	The network address of the entry to remove
Address	The IP address of the entry to remove

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procedure TIPTransport.FlushRoutes(All:Boolean);

Description: Flush routes from the route cache

All	If True flush all routes, otherwise flush expired routes

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function TIPTransport.GetAddressByAddress(const AAddress:TInAddr; ALock:Boolean; AState:LongWord):TIPAddressEntry;

Description: Find the IP address in the address cache

Address	The IP address to find
Lock	If True then lock the found entry before returning

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function TIPTransport.GetAddressByNext(APrevious:TIPAddressEntry; ALock,AUnlock:Boolean; AState:LongWord):TIPAddressEntry;

Description: To be documented

Note	None documented

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function TIPTransport.CheckAddress(AAddress:TIPAddressEntry; ALock:Boolean; AState:LongWord):Boolean;

Description: Check an address entry in the address cache

Address	The address entry to check
Lock	If True then lock the found entry before returning
State	The lock type if Lock is True (NETWORK_LOCK_READ or NETWORK_LOCK_WRITE)
Note	This allows safely obtaining a lock on an existing object in case it has been freed

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function TIPTransport.AddAddress(const AAddress:TInAddr; AAdapter:TNetworkAdapter; AType:Word; ALock:Boolean; AState:LongWord):TIPAddressEntry;

Description: Add an IP address to the address cache

Address	The IP address to add
Adapter	The adapter the address is on
Type	The type of the added entry (eg ADDRESS_TYPE_PRIMARY)
Lock	If True then lock the added entry before returning
Note	The handling of Secondary addresses should probably change in future to use a Binding type mechanism (eg AddBinding/RemoveBinding)

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function TIPTransport.RemoveAddress(const AAddress:TInAddr):Boolean;

Description: Remove an IP address from the address cache

Address	The IP address to remove

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procedure TIPTransport.FlushAddresses(All:Boolean);

Description: Flush addresses from the adresses cache

All	If True flush all addresses, otherwise flush invalid addresses

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function TIPTransport.GetNetworkByName(const AName:String; ALock:Boolean):TIPNetworkEntry;

Description: Find the name in the network cache

Name	The name to find
Lock	If True then lock the found entry before returning

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function TIPTransport.GetNetworkByAddress(const ANetwork:TInAddr; ALock:Boolean):TIPNetworkEntry;

Description: Find the network address in the network cache

Network	The network address to find
Lock	If True then lock the found entry before returning

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function TIPTransport.AddNetwork(const AName:String; const ANetwork:TInAddr; ALock:Boolean):TIPNetworkEntry;

Description: Add a network address and name to the network cache

Name	The name of the entry to add
Network	The network address of the entry to add
Lock	If True then lock the added entry before returning

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function TIPTransport.RemoveNetwork(const AName:String):Boolean;

Description: Remove a network from the network cache

Name	The name of the network to remove

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function TIPTransport.GetServByName(const AName,AProtocol:String; ALock:Boolean):TIPServEntry;

Description: Find the name in the service cache

Name	The name to find
Protocol	The protocol to find
Lock	If True then lock the found entry before returning

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function TIPTransport.GetServByPort(APort:Word; const AProtocol:String; ALock:Boolean):TIPServEntry;

Description: Find the port in the service cache

Port	The port to find
Protocol	The protocol to find
Lock	If True then lock the found entry before returning

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function TIPTransport.AddServ(const AName,AProtocol:String; APort:Word; ALock:Boolean):TIPServEntry;

Description: Add a service to the service cache

Name	The name of the entry to add
Protocol	The protocol of the entry to add
Port	The port of the entry to add
Lock	If True then lock the added entry before returning

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function TIPTransport.RemoveServ(const AName,AProtocol:String):Boolean;

Description: Remove a service from the service cache

Name	The name of the entry to remove
Protocol	The protocol of the entry to remove

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function TIPTransport.GetProtoByName(const AName:String; ALock:Boolean):TIPProtoEntry;

Description: Find the name in the protocol cache

Name	The name to find
Lock	If True then lock the found entry before returning

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function TIPTransport.GetProtoByNumber(ANumber:Word; ALock:Boolean):TIPProtoEntry;

Description: Find the protocol number in the protocol cache

Number	The protocol number to find
Lock	If True then lock the found entry before returning

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function TIPTransport.AddProto(const AName:String; ANumber:Word; ALock:Boolean):TIPProtoEntry;

Description: Add a protocol to the protocol cache

Name	The name of the entry to add
Number	The protocol number of the entry to add
Lock	If True then lock the added entry before returning

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function TIPTransport.RemoveProto(const AName:String):Boolean;

Description: Remove a protocol from the protocol cache

Name	The name of the entry to remove

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function TIPTransport.CompareLocal(const AAddress:TInAddr):Boolean;

Description: Compare the supplied address with the local IP addresses

Note	None documented

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function TIPTransport.CompareDefault(const AAddress:TInAddr):Boolean;

Description: Compare the supplied address with the default IP address

Note	None documented

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function TIPTransport.CompareLoopback(const AAddress:TInAddr):Boolean;

Description: Compare the supplied address with the loopback IP address

Note	None documented

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function TIPTransport.CompareDirected(const AAddress:TInAddr):Boolean;

Description: Compare the supplied address with the directed broadcast IP addresses

Note	None documented

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function TIPTransport.CompareBroadcast(const AAddress:TInAddr):Boolean;

Description: Compare the supplied address with the broadcast IP address

Note	None documented

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function TIPTransport.CompareMulticast(const AAddress:TInAddr):Boolean;

Description: Compare the supplied address with the multicast IP address

Note	None documented

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function TIPTransport.CompareAddress(const AAddress1,AAddress2:TInAddr):Boolean;

Description: Compare the supplied addresses to see if they are the same

Note	None documented

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function TIPTransport.CompareSubnet(const AAddress,ANetwork,ANetmask:TInAddr):Boolean;

Description: Compare the supplied address to see if it is in the supplied subnet

Note	None documented

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