TWSocket

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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 send dynamic buffer cell.
ComponentOptions
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.
FlushTimeout
Handle Handle for the underlaying hidden window.
HSocket Winsock handle for underlaying socket.
IcsLogger
LastError
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
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
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
RcvdCount
RcvdPtr
ReadCount
ReqVerLow
ReqVerHigh
ReuseAddr
SendFlags
SocksAuthentication
SocksLevel
SocksPassword
SocksPort
SocksServer
SocksUsercode
State Current state of the socket, mainly used for log or display purposes.
Terminated
Text

Methods

Abort Close the socket, see also Closing a TCP session.
Accept
CancelDnsLookup
Close Close the socket gracefull, see also Closing a TCP session.
CloseDelayed Close the socket gracefull in a message handler, see also Closing a TCP session.
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, see also Closing a TCP session.
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

Title



ICS Components Reference