Unit Transport
From Ultibo.org
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Contents
Description
Ultibo Network Transport interface unit
Notes:
Includes all global transport definitions plus base class for Network transports.
Currently supported transports are IP, ARP, RARP, IPX and IP6.
All HostToNetwork swaps occur at the level where they are appropriate (ie the level of their header).
Bindings is provided to support Transports (such as IP) which can provide multiple addresses on a single adapter. It is not used by the Protocol or Winsock layer and is only used by the transport where appropriate. In such cases the ConfigType in the Adapter object is not used and the Binding is used instead.
Constants
Transport specific constants
*_TYPE_* HOST_TYPE_DYNAMIC = 0;
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HOST_TYPE_STATIC = 1;
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HOST_TYPE_LOOPBACK = 2;
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ROUTE_TYPE_DYNAMIC = 0;
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ROUTE_TYPE_STATIC = 1;
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ROUTE_TYPE_LOOPBACK = 2;
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Loopback Route |
ROUTE_TYPE_GATEWAY = 3;
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Default Route |
ROUTE_TYPE_MULTICAST = 4;
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Multicast Route |
ROUTE_TYPE_BROADCAST = 5;
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Broadcast Route |
ADDRESS_TYPE_DYNAMIC = 0;
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Remote Dynamic Address |
ADDRESS_TYPE_STATIC = 1;
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Remote Static Address |
ADDRESS_TYPE_LOCAL = 2;
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Local Address (ARP/RARP Only) |
ADDRESS_TYPE_LOOPBACK = 3;
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Local Loopback |
ADDRESS_TYPE_MULTICAST = 4;
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Local Multicast |
ADDRESS_TYPE_BROADCAST = 5;
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Local Broadcast |
ADDRESS_TYPE_PRIMARY = 6;
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Same as Local but used by IP/IP6 |
ADDRESS_TYPE_SECONDARY = 7;
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Same as Local but used by IP/IP6 |
Host constants
*_HOST_* MAX_HOST_LIFE = 600000;
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10 Minute Host lifespan |
Route constants
*_ROUTE_* MAX_ROUTE_LIFE = 600000;
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10 min Route lifespan |
Address constants
*_ADDRESS_* MAX_ADDRESS_LIFE = 300000;
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5 min Address (ARP) lifespan |
IP_ADDRESS_SIZE = 4;
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SizeOf(TInAddr) |
IP6_ADDRESS_SIZE = 16;
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SizeOf(TIn6Addr) |
IPX_ADDRESS_SIZE = 12;
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SizeOf(TIpxAddr) |
Transport socket
TTL_* TTL_DEFAULT = 128;
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Default to 128 Seconds/Hops (Defined as 64) |
TOS_DEFAULT = 0;
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HOPLIMIT_DEFAULT = 255;
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Default to 255 Hops (Defined as 64) |
ID_INCREMENT = 1;
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Default Increment for ID Numbers |
TTL_DECREMENT = 1;
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Default Decrement for TTL when Forwarding |
SEND_TIMEOUT = 0;
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Default to wait forever on Send |
RECV_TIMEOUT = 0;
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Default to wait forever on Recv |
CLOSE_TIMEOUT = 3000;
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Time that Socket is kept before destruction |
LINGER_TIMEOUT = 60000;
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Time that Socket goes into Linger state for |
CONNECT_TIMEOUT = 5000;
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Time that Socket waits for connect completion |
TIMEWAIT_TIMEOUT = 240000;
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Time that Socket goes into TimeWait state for (2 x MSL) |
Shutdown constants
SHUTDOWN_* SHUTDOWN_RECV = 0;
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SHUTDOWN_SEND = 1;
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SHUTDOWN_BOTH = 2;
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Select constants
SELECT_* SELECT_READ = 0;
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SELECT_WRITE = 1;
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SELECT_ERROR = 2;
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SELECT_UNKNOWN = -1;
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Socket state
SS_* SS_NOFDREF = $0001;
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no file table ref any more |
SS_UNCONNECTED = SS_NOFDREF;
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or just created socket |
SS_ISCONNECTED = $0002;
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socket connected to a peer |
SS_ISCONNECTING = $0004;
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in process of connecting |
SS_ISDISCONNECTING = $0008;
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in process of disconnecting |
SS_CANTSENDMORE = $0010;
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can't send more data |
SS_CANTRCVMORE = $0020;
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can't receive more data |
SS_RCVATMARK = $0040;
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at mark on input |
SS_PRIV = $0080;
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privileged for broadcast |
SS_NBIO = $0100;
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non-blocking ops |
SS_ASYNC = $0200;
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async i/o notify |
SS_ISCONFIRMING = $0400;
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accepting connection req |
SS_ISLISTENING = SS_ISCONFIRMING;
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non standard |
SS_LOCAL_ADDR = $0800;
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has local address/port (not used) |
SS_REMOTE_ADDR = $1000;
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has remote address/port (not used) |
SS_CONN_REFUSED = $2000;
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connection refused (ICMP_UNREACH) |
SS_CLOSED = $4000;
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socket has been closed |
IPv4 transport
IP_* IP_LOOPBACK_ADDRESS:TInAddr = (S_addr: $7F000001);
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127.0.0.1 |
IP_LOOPBACK_NETWORK:TInAddr = (S_addr: $7F000000);
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127.0.0.0 |
IP_LOOPBACK_NETMASK:TInAddr = (S_addr: $FF000000);
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255.0.0.0 |
IP_BROADCAST_ADDRESS:TInAddr = (S_addr: $FFFFFFFF);
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255.255.255.255 |
IP_BROADCAST_NETWORK:TInAddr = (S_addr: $FFFFFFFF);
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255.255.255.255 |
IP_BROADCAST_NETMASK:TInAddr = (S_addr: $FFFFFFFF);
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255.255.255.255 |
IP_DEFAULT_ADDRESS:TInAddr = (S_addr: $00000000);
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0.0.0.0 |
IP_DEFAULT_NETWORK:TInAddr = (S_addr: $00000000);
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0.0.0.0 |
IP_DEFAULT_NETMASK:TInAddr = (S_addr: $00000000);
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0.0.0.0 |
IP_MULTICAST_HOSTS:TInAddr = (S_addr: $E0000001);
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224.0.0.1 (All Hosts) |
IP_MULTICAST_ROUTERS:TInAddr = (S_addr: $E0000002);
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224.0.0.2 (All Routers) |
IP_MULTICAST_NETWORK:TInAddr = (S_addr: $E0000000);
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224.0.0.0 |
IP_MULTICAST_NETMASK:TInAddr = (S_addr: $F0000000);
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240.0.0.0 |
| Note: The recommended range for general use is 234.0.0.0 to 238.255.255.255 | |
IP_CLASSA_NETMASK:TInAddr = (S_addr: $FF000000);
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255.0.0.0 |
IP_CLASSB_NETMASK:TInAddr = (S_addr: $FFFF0000);
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255.255.0.0 |
IP_CLASSC_NETMASK:TInAddr = (S_addr: $FFFFFF00);
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255.255.255.0 |
IP_CLASSD_NETMASK:TInAddr = (S_addr: $F0000000);
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240.0.0.0 |
IP_CLASSE_NETMASK:TInAddr = (S_addr: $F0000000);
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240.0.0.0 |
IPv6 transport
IP6_* IP6_LOOPBACK_ADDRESS:TIn6Addr = (S6_addr: ($00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$01));
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IP6_DEFAULT_ADDRESS:TIn6Addr = (S6_addr: ($00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00));
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Type definitions
Transport statistics
PTransportStatistics = ^TTransportStatistics;
TTransportStatistics = record
| Note: Generic Transport | |
PacketsIn:Int64;
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PacketsOut:Int64;
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BytesIn:Int64;
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BytesOut:Int64;
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ErrorsIn:Int64;
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ErrorsOut:Int64;
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PacketsLost:Int64;
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IPv4 nameservers
PIPNameservers = ^TIPNameservers;
TIPNameservers = array[0..MAX_NAME_SERVERS - 1] of TInAddr;
| Note: IP4 Transport | |
IPv6 nameservers
PIP6Nameservers = ^TIP6Nameservers;
TIP6Nameservers = array[0..MAX_NAME_SERVERS - 1] of TIn6Addr;
| Note: IP6 Transport | |
Transport callback
TTransportCallback = function(ATransport:TNetworkTransport):Boolean of object;
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Monitor callback
TMonitorCallback = function(AMonitor:TNetworkMonitor):Boolean of object;
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Authenticator callback
TAuthenticatorCallback = function(AAuthenticator:TNetworkAuthenticator):Boolean of object;
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Transport packet handler
TTransportPacketHandler = function(AHandle:THandle; ASource,ADest,APacket:Pointer; ASize:Integer; ABroadcast:Boolean):Boolean of object;
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Transport control handler
TTransportControlHandler = function(AHandle:THandle; ASource,ADest:Pointer; AProtocol,ACommand,ACode:Word; AAddress,AData:Pointer; ASize:Integer):Boolean of object;
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Transport filter handler
TTransportFilterHandler = function(AHandle:THandle; ASource,ADest,APacket:Pointer; ASize:Integer; ABroadcast:Boolean):Boolean of object;
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Transport configuration handler
TTransportConfigHandler = function(AHandle:THandle; AAdapter:TTransportAdapter; ACommand:Word):Boolean of object;
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Class definitions
Transport manager
TTransportManager = class(TObject)
constructor Create(ASettings:TNetworkSettings; AAdapters:TAdapterManager);
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destructor Destroy; override;
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private
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FLock:TSynchronizerHandle;
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FSettings:TNetworkSettings;
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FAdapters:TAdapterManager;
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FTransports:TNetworkList;
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List of TNetworkTransport objects |
FMonitors:TNetworkList;
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List of TNetworkMonitor objects |
FAuthenticators:TNetworkList;
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List of TNetworkAuthenticator objects |
function ReaderLock:Boolean;
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function ReaderUnlock:Boolean;
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function WriterLock:Boolean;
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function WriterUnlock:Boolean;
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public
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property Settings:TNetworkSettings read FSettings;
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property Adapters:TAdapterManager read FAdapters;
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function AddTransport(ATransport:TNetworkTransport):Boolean;
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function RemoveTransport(ATransport:TNetworkTransport):Boolean;
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function GetTransportByName(const AName:String; ALock:Boolean; AState:LongWord):TNetworkTransport;
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function GetTransportByType(AFamily,APacketType:Word; ALock:Boolean; AState:LongWord):TNetworkTransport;
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function GetTransportByTransport(ATransport:TNetworkTransport; ALock:Boolean; AState:LongWord):TNetworkTransport;
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function GetTransportByNext(APrevious:TNetworkTransport; ALock,AUnlock:Boolean; AState:LongWord):TNetworkTransport;
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function AddMonitor(AMonitor:TNetworkMonitor):Boolean;
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function RemoveMonitor(AMonitor:TNetworkMonitor):Boolean;
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function GetMonitorByMonitor(AMonitor:TNetworkMonitor; ALock:Boolean; AState:LongWord):TNetworkMonitor;
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function GetMonitorByNext(APrevious:TNetworkMonitor; ALock,AUnlock: Boolean; AState:LongWord):TNetworkMonitor;
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function AddAuthenticator(AAuthenticator:TNetworkAuthenticator):Boolean;
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function RemoveAuthenticator(AAuthenticator:TNetworkAuthenticator):Boolean;
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function GetAuthenticatorByType(AAuthType:Word; ALock:Boolean; AState:LongWord):TNetworkAuthenticator;
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function GetAuthenticatorByAuthenticator(AAuthenticator:TNetworkAuthenticator; ALock:Boolean; AState:LongWord):TNetworkAuthenticator;
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function GetAuthenticatorByNext(APrevious:TNetworkAuthenticator; ALock,AUnlock:Boolean; AState:LongWord):TNetworkAuthenticator;
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function StartTransports:Boolean;
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function StopTransports:Boolean;
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function ProcessTransports:Boolean;
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function EnumerateTransports(ACallback:TTransportCallback):Boolean;
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function BindTransports(AAdapter:TNetworkAdapter):Boolean;
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function UnbindTransports(AAdapter:TNetworkAdapter):Boolean;
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function StartMonitors:Boolean;
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function StopMonitors:Boolean;
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function ProcessMonitors:Boolean;
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function EnumerateMonitors(ACallback:TMonitorCallback):Boolean;
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function BindMonitors(AAdapter:TNetworkAdapter):Boolean;
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function UnbindMonitors(AAdapter:TNetworkAdapter):Boolean;
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function StartAuthenticators:Boolean;
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function StopAuthenticators:Boolean;
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function ProcessAuthenticators:Boolean;
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function EnumerateAuthenticators(ACallback:TAuthenticatorCallback):Boolean;
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function BindAuthenticators(AAdapter:TNetworkAdapter):Boolean;
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function UnbindAuthenticators(AAdapter:TNetworkAdapter):Boolean;
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Transport buffer
TTransportBuffer = class(TObject)
constructor Create(ATransport:TNetworkTransport);
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destructor Destroy; override;
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private
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FLock:TCriticalSectionHandle;
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protected
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FTransport:TNetworkTransport;
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function AcquireLock:Boolean;
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function ReleaseLock:Boolean;
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Transport buffer extended
TTransportBufferEx = class(TObject)
constructor Create(ATransport:TNetworkTransport);
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destructor Destroy; override;
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private
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FLock:TSynchronizerHandle;
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protected
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FTransport:TNetworkTransport;
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function ReaderLock:Boolean;
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function ReaderUnlock:Boolean;
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function ReaderConvert:Boolean;
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function WriterLock:Boolean;
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function WriterUnlock:Boolean;
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function WriterConvert:Boolean;
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function WriterOwner:Boolean;
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Transport adapter
TTransportAdapter = class(TListObject)
| Note: Downstream | |
constructor Create;
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destructor Destroy; override;
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private
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FLock:TSynchronizerHandle;
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public
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Name:String;
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Index:LongWord;
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Handle:THandle;
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PacketType:Word;
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Adapter:TNetworkAdapter;
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Hardware:THardwareAddress;
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Broadcast:THardwareAddress;
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MTU:Word;
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ConfigType:Word;
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BOOTP/DHCP/RARP/STATIC/PSEUDO/LOOPBACK |
Configured:Boolean;
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Adapter has been configured |
Configuring:Boolean;
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Adapter is being configured |
function ReaderLock:Boolean;
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function ReaderUnlock:Boolean;
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function ReaderConvert:Boolean;
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function WriterLock:Boolean;
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function WriterUnlock:Boolean;
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function WriterConvert:Boolean;
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Transport binding
TTransportBinding = class(TListObject)
| Note: Midstream | |
constructor Create;
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destructor Destroy; override;
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private
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FLock:TSynchronizerHandle;
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public
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Name:String;
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Index:LongWord;
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Adapter:TTransportAdapter;
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ConfigType:Word;
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BOOTP/DHCP/RARP/STATIC/PSEUDO/LOOPBACK |
Configured:Boolean;
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Adapter has been configured |
Configuring:Boolean;
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Adapter is being configured |
function ReaderLock:Boolean;
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function ReaderUnlock:Boolean;
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function ReaderConvert:Boolean;
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function WriterLock:Boolean;
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function WriterUnlock:Boolean;
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function WriterConvert:Boolean;
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Transport protocol
TTransportProtocol = class(TListObject)
| Note: Upstream | |
constructor Create;
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destructor Destroy; override;
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private
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FLock:TSynchronizerHandle;
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public
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Protocol:Word;
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PacketHandler:TTransportPacketHandler;
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ControlHandler:TTransportControlHandler;
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function ReaderLock:Boolean;
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function ReaderUnlock:Boolean;
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function WriterLock:Boolean;
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function WriterUnlock:Boolean;
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Transport filter
TTransportFilter = class(TListObject)
| Note: Upstream | |
constructor Create;
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destructor Destroy; override;
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private
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FLock:TSynchronizerHandle;
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public
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Protocol:Word;
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FilterHandler:TTransportFilterHandler;
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function ReaderLock:Boolean;
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function ReaderUnlock:Boolean;
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function WriterLock:Boolean;
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function WriterUnlock:Boolean;
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Transport configuration
TTransportConfig = class(TListObject)
| Note: Upstream | |
constructor Create;
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destructor Destroy; override;
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private
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FLock:TSynchronizerHandle;
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public
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ConfigType:Word;
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BOOTP/DHCP/RARP/STATIC/PSEUDO/LOOPBACK |
ConfigAuto:Boolean;
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Supports Auto Configuration |
ConfigHandler:TTransportConfigHandler;
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function ReaderLock:Boolean;
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function ReaderUnlock:Boolean;
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function WriterLock:Boolean;
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function WriterUnlock:Boolean;
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Network transport
TNetworkTransport = class(TListObject)
constructor Create(AManager:TTransportManager; const AName:String);
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destructor Destroy; override;
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private
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FLock:TSynchronizerHandle;
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FLocalLock:TMutexHandle;
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protected
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FManager:TTransportManager;
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FName:String;
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TTransportManager = class(TObject)
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TTransportBuffer = class(TObject)
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TTransportBufferEx = class(TObject)
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TTransportAdapter = class(TListObject)
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TTransportBinding = class(TListObject)
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TTransportProtocol = class(TListObject)
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TTransportFilter = class(TListObject)
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TTransportConfig = class(TListObject)
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TNetworkTransport = class(TListObject)
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TMonitorAdapter = class(TListObject)
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TNetworkMonitor = class(TListObject)
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TAuthenticatorAdapter = class(TListObject)
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TNetworkAuthenticator = class(TListObject)
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TTransportSocket = class(TListObject)
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TSocketList = class(TObject)
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TSocketState = class(TObject)
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TSocketBuffer = class(TObject)
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TSocketOptions = class(TObject)
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TTransportState = class(TObject)
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TTransportOptions = class(TObject)
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THostEntry = class(TListObject)
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TRouteEntry = class(TListObject)
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TAddressEntry = class(TListObject)
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TNetworkEntry = class(TListObject)
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TServEntry = class(TListObject)
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TProtoEntry = class(TListObject)
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Public variables
Transport specific variables
TransportManager:TTransportManager;
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Function declarations
Initialization functions
procedure TransportInit;
Description: To be documented
| Note | None documented |
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function TransportStart:LongWord;
Description: To be documented
| Note | None documented |
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function TransportStop:LongWord;
Description: To be documented
| Note | None documented |
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function TransportBind:LongWord;
Description: To be documented
| Note | None documented |
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function TransportUnbind:LongWord;
Description: To be documented
| Note | None documented |
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Transport functions
function InAddrToHost(const AAddress:TInAddr):TInAddr; inline;
Description: Convert an InAddr in Network order to Host order
| Note | None documented |
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function InAddrToNetwork(const AAddress:TInAddr):TInAddr; inline;
Description: Convert an InAddr in Host order to Network order
| Note | None documented |
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function InAddrToString(const AAddress:TInAddr):String;
Description: Convert an InAddr to a String
| Note | Expects Address to be in Network order |
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function StringToInAddr(const AAddress:String):TInAddr;
Description: Convert a String to an InAddr
| Note | Returns Address in Network order |
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function InAddrIsEqual(const AAddress1,AAddress2:TInAddr):Boolean;
Description: Check the supplied addresses to see if they are the same
| Note | Expects Address to be in Host order |
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function InAddrIsNone(const AAddress:TInAddr):Boolean;
Description: Check the supplied address to see if it is equal to INADDR_NONE
| Note | Expects Address to be in Host order |
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function InAddrIsDefault(const AAddress:TInAddr):Boolean;
Description: Check the supplied address to see if it is the default address
| Note | Expects Address to be in Host order |
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function InAddrIsLoopback(const AAddress:TInAddr):Boolean;
Description: Check the supplied address to see if it is a loopback address
| Note | Expects Address to be in Host order |
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function InAddrIsBroadcast(const AAddress:TInAddr):Boolean;
Description: Check the supplied address to see if it is the broadcast address
| Note | Expects Address to be in Host order |
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function InAddrIsMulticast(const AAddress:TInAddr):Boolean;
Description: Check the supplied address to see if it is a multicast address
| Note | Expects Address to be in Host order |
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function In6AddrToString(const AAddress:TIn6Addr):String;
Description: To be documented
| Note | None documented |
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function StringToIn6Addr(const AAddress:String):TIn6Addr;
Description: To be documented
| Note | None documented |
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function In6AddrIsEqual(const AAddress1,AAddress2:TIn6Addr):Boolean;
Description: Check the supplied addresses to see if they are the same
| Note | None documented |
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function In6AddrIsDefault(const AAddress:TIn6Addr):Boolean;
Description: Check the supplied address to see if it is the default address
| Note | None documented |
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function In6AddrIsLoopback(const AAddress:TIn6Addr):Boolean;
Description: Check the supplied address to see if it is a loopback address
| Note | None documented |
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function In6AddrIsLinkLocal(const AAddress:TIn6Addr):Boolean;
Description: Check the supplied address to see if it is a link local address
| Note | None documented |
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function In6AddrIsSiteLocal(const AAddress:TIn6Addr):Boolean;
Description: Check the supplied address to see if it is a site local address
| Note | None documented |
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function In6AddrIsV4Mapped(const AAddress:TIn6Addr):Boolean;
Description: Check the supplied address to see if it is a V4 mapped address
| Note | None documented |
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function In6AddrIsV4Compatible(const AAddress:TIn6Addr):Boolean;
Description: Check the supplied address to see if it is a V4 compatible address
| Note | None documented |
|---|
function In6AddrIsMulticast(const AAddress:TIn6Addr):Boolean;
Description: Check the supplied address to see if it is a multicast address
| Note | None documented |
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function In6AddrIsMulticastNodeLocal(const AAddress:TIn6Addr):Boolean;
Description: Check the supplied address to see if it is a multicast node local address
| Note | None documented |
|---|
function In6AddrIsMulticastLinkLocal(const AAddress:TIn6Addr):Boolean;
Description: Check the supplied address to see if it is a multicast link local address
| Note | None documented |
|---|
function In6AddrIsMulticastSiteLocal(const AAddress:TIn6Addr):Boolean;
Description: Check the supplied address to see if it is a multicast site local address
| Note | None documented |
|---|
function In6AddrIsMulticastOrgLocal(const AAddress:TIn6Addr):Boolean;
Description: Check the supplied address to see if it is a multicast org local address
| Note | None documented |
|---|
function In6AddrIsMulticastGlobal(const AAddress:TIn6Addr):Boolean;
Description: Check the supplied address to see if it is a multicast global address
| Note | None documented |
|---|
function IpxAddrToString(const AAddress:TIpxAddr):String;
Description: To be documented
| Note | None documented |
|---|
function StringToIpxAddr(const AAddress:String):TIpxAddr;
Description: To be documented
| Note | None documented |
|---|
function GetChecksum(ABuffer:Pointer; AOffset,ALength:Word):Word;
Description: Calculate the 1s Compliment Checksum of the Supplied Buffer
| Note | None documented |
|---|
function GetChecksum2(APseudo,ABuffer:Pointer; APseudoLength,ABufferOffset,ABufferLength:Word):Word;
Description: Calculate the 1s Compliment Checksum of the Supplied Pseudo and Buffer
| Note | Pseudo is expected to start from Offset 0 |
|---|
function GetChecksum3(APseudo,AHeader,AData:Pointer; APseudoLength,AHeaderLength,ADataOffset,ADataLength:Word):Word;
Description: Calculate the 1s Compliment Checksum of the Supplied Pseudo, Header and Data
| Note | Pseudo and Header are expected to start from Offset 0 |
|---|
function GetChecksum4(APseudo,AHeader,AOptions,AData:Pointer; APseudoLength,AHeaderLength,AOptionsLength,ADataOffset,ADataLength:Word):Word;
Description: Calculate the 1s Compliment Checksum of the Supplied Pseudo, Header, Options and Data
| Note | Pseudo, Header and Options are expected to start from Offset 0. |
|---|
Transport helper functions
function HostTypeToString(AType:Word):String;
Description: To be documented
| Note | None documented |
|---|
function RouteTypeToString(AType:Word):String;
Description: To be documented
| Note | None documented |
|---|
function AddressTypeToString(AType:Word):String;
Description: To be documented
| Note | None documented |
|---|
function ProtocolToString(AProtocol:Word):String;
Description: To be documented
| Note | None documented |
|---|
function SocketTypeToString(ASocketType:Word):String;
Description: To be documented
| Note | None documented |
|---|
function AddressFamilyToString(AFamily:Word):String;
Description: To be documented
| Note | None documented |
|---|
