TWSocket

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Revision as of 13:03, 26 February 2006 by Sysop (talk | contribs) (→‎Properties)
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Main page -> ICS component reference -> TWSocket

Overview

unit WSocket.pas
inheritance

TWSocket component is implementing the TCP protocol described in RFC 793 and and UDP protocol described in RFC 768. Both protocols are encaptulated by the IP protocol described in RFC 791. TWSocket is used in almost every other ICS component.

TWSocket component can be used as client or a server. For its use as TCP server however TWSocketServer is encouraged because of his advanced features.

Properties

Addr Client: The host to connect to. Server: The interface to listen on.
AllSent
BufSize Size in bytes for dynamic send buffer cells.
ComponentOptions Used to modify how the component handle some operations.
DnsResult Typically called in OnDnsLookupDone. The IP address of the remote host given as argument to DnsLookup.
DnsResultList Similar to DnsResult but a TStringList containing the multiple IP's of the host if appropriate.
Handle Handle for the underlaying hidden window.
HSocket Winsock handle for underlaying socket.
IcsLogger
LastError Save the last error occured during socket operation.
LineEcho Echo all received characters back to tramitter.
LineEdit Handle received control characters used for editing.
LineEnd End of line character(s) used ot trigger OnDataAvailable.
LineLength When using LineMode: the length of the received line.
LineLimit Maximum line lenght to receive before triggering OnLineLimitExceeded. See also DOS attac.
LineMode Use LineEnd as end of line marker to trigger OnDataAvailable.
LingerOnOff
LingerTimeout
ListenBacklog Size of pending connection queue in server mode.
LocalAddr The local address where the socket is bound to.
LocalPort The local port where the socket is bound to.
MultiCast
MultiCastAddrStr
MultiCastIpTTL
MultiThreaded Set when TWSocket has to use his own message pump.
PeerAddr The remote address where the socket is bound to.
PeerPort The remote port port where the socket is bound to.
Port Client: The port to connect to. Server: The port to listen on.
PortNum Integer value of Port.
Proto The protocol to use, can be tcp or tcp.
RcvdCnt Number of character received in internal buffer when using line mode.
RcvdCount Number of characters in receive buffer but not read yet.
RcvdPtr Internal rceive buffer pointer used for line mode.
ReadCount Total number of bytes received.
ReqVerLow Low part of winsock version to load.
ReqVerHigh High part of winsock version to load.
ReuseAddr Should the compnent try to reuse an address.
SendFlags How to send data.
SocksAuthentication
SocksLevel
SocksPassword
SocksPort Port number for socks server.
SocksServer IP or hostname for socks server.
SocksUsercode Usercode for socks server authentication.
State Current state of the socket, mainly used for log or display purposes.
Terminated To be set to terminate synchronous operation prematurely.
Text Equivalent to ReceiveStr and SendStr.

Methods

Abort Quick and dirty way to close the socket.
Accept
CancelDnsLookup
Close Close the socket gracefull.
CloseDelayed Close the socket gracefull in a message handler.
Connect Connect to a remote host.
Create
DeleteBufferedData
Destroy
DnsLookup Perform a DNS lookup of a hostname in background. See also OnDNSLookupDone.
Dup
Flush
GetPeerAddr
GetPeerName
GetPeerPort
GetSockName
GetXAddr
GetXPort
Listen
MessageLoop
MessagePump
Pause
PeekData
ProcessMessage
ProcessMessages
PutDataInSendBuffer
PutStringInSendBuffer
Receive
ReceiveFrom
ReceiveStr
Release
Resume
ReverseDnsLookup
Send
SendStr
SendTo
SetLingerOption
Shutdown Close the socket gracefull.
TimerClear
TimerCmp
TimerIsSet
ThreadAttach
ThreadDetach
WaitForClose Align test

Events

OnBgException Background exception occured.
OnChangeState State of TWSocket has changed.
OnDataAvailable Data available in internal receive buffer.
OnDataSent Internal sent buffer is completely delivered to winsock.
OnDebugDisplay
OnDnsLookupDone DNSLookup has finished.
OnError Discouraged, use exception handling instead.
OnLineLimitExceeded Denial of service attack
OnMessagePump To call your own message pump.
OnSendData Winsock send buffer is empty, will be filled again by internal send buffer if still data available to send.
OnSessionAvailable Client connected to this server.
OnSessionClosed Socket has closed.
OnSessionConnected Session to host etablished.
OnSocksAuthState
OnSocksConnected
OnSocksError

How to



ICS Components Reference