Other Library Functions

tcp-connect

function

Library: TCP/IP client and server support (OMTCP legacy, OmniMark versions 6.0.2 - 7.0)
Include: omtcp.xin

Returns:


Declaration 
define external tcp-connection function tcp-connect
       on value string HostName
       at 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

You must include the following line at the beginning of your OmniMark program: 

  include "omtcp.xin"

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 


  local tcp-connection client
  
  set client to tcp-connect on "123.123.123.45" at 5600

Other Library Functions