tcp.connect

function

Library: TCP/IP client and server support (OMTCP)
Import : omtcp.xmd

Returns:

Declaration

define external tcp.connection function 
   tcp.connect      to value string HostName
                    on value integer PortNum
               timeout value integer ms optional

Argument definitions

HostName: is the name or IP address of the host to be connected to.

PortNum: is the port to be connected to.

ms: is how long the function will attempt to make connection before aborting, expressed in milliseconds.

Purpose

Use tcp.connect in a client program to establish a connection to a server program that is running on a specific host machine and port.

Requirements

The address supplied for HostName must be valid (else external exception TCP01).

The port number must fall between 0 and 65535 (else external exception TCP14).

Usage

If the connection cannot be made for any reason, the function throws external exception TCP08.

If the timeout value is specified it applies only to the wait for the connection. If the timeout is exceeded, the connection fails.

If the timeout is not specified, tcp.connect "blocks" until a connection is made or some other cause of failure is encountered.

Example

  import "omtcp.xmd" prefixed by tcp.
  
  process
     local tcp.connection client
  
     set client to tcp.connect to "123.123.123.45" on 5600

Related Topics

Other Library Functions