Difference between revisions of "TWSocket.Port"
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=== Server === | === Server === | ||
| − | The port on the interface where the server will listen either for incomming connections and data (TCP) or for data only (UDP). | + | The port on the interface where the server will listen either for incomming connections and data (TCP) or for data only (UDP). If a TCP server specified '0.0.0.0' for Addr, the port is available on all IP-adresses the server currently posseses (including 127.0.0.1 and dial in internet connections). |
Under windows the netstat command may be used to check which ports are already in use and by what application. Call netstat -? for details on its usage. | Under windows the netstat command may be used to check which ports are already in use and by what application. Call netstat -? for details on its usage. | ||
== Example == | == Example == | ||
| + | |||
| + | === TCP client === | ||
| + | |||
| + | WSocket1.addr:='192.168.0.1'; // Address to connect to | ||
| + | WSocket1.port:='5000'; // Port to connect to | ||
| + | WSocket1.proto:='tcp'; | ||
| + | WSocket1.connect; // actually do the connect | ||
| + | |||
| + | === TCP server === | ||
| + | |||
| + | WSocket1.addr:='192.168.0.1'; // Address to connect to | ||
| + | WSocket1.port:='5000'; // Port to connect to | ||
| + | WSocket1.proto:='tcp'; | ||
| + | WSocket1.listen; // wait for incomming connections | ||
| + | // but return immediatelly | ||
| + | |||
| + | === UDP === | ||
| + | |||
| + | WSocket1.addr:='192.168.0.1'; // Address to connect to | ||
| + | WSocket1.port:='5000'; // Port to connect to | ||
| + | WSocket1.proto:='udp'; | ||
| + | WSocket1.listen; // incomming data will directly raise | ||
| + | // OnDataAVailable | ||
== Best practices == | == Best practices == | ||
== How to == | == How to == | ||
Revision as of 10:00, 12 September 2006
Main page -> ICS component reference -> TWSocket -> Port
Contents
Definition
property Port: string;
Description
Client
This specifies the port on the server where a connect will connect you. This only applies to TCP, since UDP doesn't use the client/server sheme.
Server
The port on the interface where the server will listen either for incomming connections and data (TCP) or for data only (UDP). If a TCP server specified '0.0.0.0' for Addr, the port is available on all IP-adresses the server currently posseses (including 127.0.0.1 and dial in internet connections).
Under windows the netstat command may be used to check which ports are already in use and by what application. Call netstat -? for details on its usage.
Example
TCP client
WSocket1.addr:='192.168.0.1'; // Address to connect to WSocket1.port:='5000'; // Port to connect to WSocket1.proto:='tcp'; WSocket1.connect; // actually do the connect
TCP server
WSocket1.addr:='192.168.0.1'; // Address to connect to
WSocket1.port:='5000'; // Port to connect to
WSocket1.proto:='tcp';
WSocket1.listen; // wait for incomming connections
// but return immediatelly
UDP
WSocket1.addr:='192.168.0.1'; // Address to connect to
WSocket1.port:='5000'; // Port to connect to
WSocket1.proto:='udp';
WSocket1.listen; // incomming data will directly raise
// OnDataAVailable
