The iocp Tcl extension implements channels and related utility commands on Windows platforms based on Windows I/O Completion Ports (IOCP). The extension requires Windows 7 or later.

The extension includes the following packages:

  • The iocp_inet package implements communication channels over TCP/IP.
  • The iocp_bt package implements Bluetooth channels (currently client-only) along with supporting commands for device and service discovery.


The extension may be downloaded from

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