On 2009-04-11, Grant Edwards <gra...@visi.com> wrote: > You can write a port redirector in user-space in MS-Windows, > but you can't in Linux/Unix. On Unix systems you have to > write a kernel module that sits below the tty layer.
Perhaps I should elucidate further. That's what the "pty" driver on Unix is: a kernel module that sits underneath the tty layer where the "normal" serial-port UART drivers sit. However, Unix pty drivers only handles a subset of the normal serial-port API. [I'm not sure why pty drivers have never been "finished" so that they fully emulate a serial port, but it's been that way for 20+ years]. If RouteBuddy doesn't try to do things like get/set modem control/status lines, then the OP might be able to use a pty. Each pty consists of two devices: a master end and a slave end. RouteBuddy would be told to use the slave end, and the OP would write a program that would transfer data between a network connection and the master end. A pty devices is what is used by programs like xterm to run programs like bash. Xterm transfers data between a network connection and the master end of a pty. Bash is connected to the slave end of that pty and "thinks" it's connected to a serial port. Bash uses little of the serial port API, so it's happy with the limited API provided by a pty slave-end. -- Grant -- http://mail.python.org/mailman/listinfo/python-list