send data to serial port from kernel code

[Stephan Uphoff]

On Tue, 2005-03-08 at 17:04, Jerry Toung wrote:
> Good afternoon list,
> I am looking for a way to write data to the serial interface (/dev/cuaa0) from 
> a kernel module and also read /dev/ttyd0 still from that same kernel module.
> Any pointers to doing that will be great.
> 
> I want on exchange IP traffic from FreeBSD to another host with different OS 
> via serial cable (null modem). So instead of making a call the NIC driver, I 
> want to use the serial port as may physical layer.
> Any other ideas for doing this is welcome as well.
> 
> I know the basics of serial programming from a regular C application:
> 
> #include <termios.h>
> 
> fd = open("/dev/cuaa0", O_RDWR|O_NDELAY)
> tcsetattr and tcgetattr
> etc etc.
> 
> 
> but that's not what I am looking for.
> 
> Thank you.
> Jerry

What is wrong with just using PPP ?

Stephan