On Thu, Apr 27, 2006 at 12:21:47PM -0400, Naveen Manicka wrote: > Hi everybody, > > I am trying to understand how GNUradio interacts with the kernel to send and > receive data packets using the tunnel communication example.
Have you read the README in gnuradio-examples/python/gmsk2 and the documents that it references? See /usr/src/linux/Documentation/networking/tuntap.txt and/or Google for "universal tun tap". The Linux kernel includes the tun module. You may have to "modprobe tun" if it's not loaded by default. If /dev/net/tun doesn't exist, try "modprobe tun". > Since we don't recompile the kernel when installing gnuradio, the USRP board > is just recognized as a USB device. It's *always* just recognized as a USB device. As the README says, we use the "tun driver" to push and pull packets into the kernel from user mode. In the tunnel_ip_null_mac.py code, look at open_tun_interface, and then look at all references to tun_fd. > So, after setting up the static routes (the gr0 and gr1 in the tunnel > example) how is the data packet handed to the gnuradio? >From the outside use ping, tcp, udp, whatever... It looks like a network interface. > Also, If I want to implement a different MAC protocol in GNURadio. how do I > go about it? More on that later... > Thank you, > Naveen Eric _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
