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

Return type: Switch Returns:

Declaration

define external switch function tcp-is-connected
      value tcp-connection Connection

Argument definitions

Connection

is variable of type tcp-connection.

Use tcp-is-connected to determine if the TCP connection is currently connected, independently of whether it's just been declared, is open, or is in error.

Requirements

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

  include "omtcp.xin"

It is always valid to call this function.

Usage Notes

None.

Example

  local tcp-connection Client
  
  set Client to tcp-connect on "osarus" at 5902
  repeat
     exit unless tcp-is-connected Client
  
     ;process
  again

Other Library Functions tcp-accept-connection tcp-connect tcp-connection tcp-create-service tcp-destroy-service tcp-disconnect tcp-get tcp-has-characters tcp-is-connected tcp-is-version-compatible tcp-library-version tcp-peer-ip tcp-peer-name tcp-port tcp-put tcp-service tcp-set-buffering tcp-signal-source-end tcp-sink tcp-source

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