readme

README.md

@@ -2,3 +2,38 @@
 Dummy network interface bridge with multi-queuing to test taprio also without intel NIC
 
 the code based on the Networkdriver of the TrustNode TSN switch: https://github.com/InnoRoute/packages/tree/master/TrustNodeDriver
+
+
+## How tu use:
+if you have the Kernel 5.2.x installed, ignore the install scripts just :
+
+* make 
+* ./installdriver.sh
+
+The driver will create 4  virtual interfaces TN0..TN3, pairs of two are connected with eachother.
+TN0<-->TN1, TN2<-->TN3.
+
+## TSN example:
+
+```
+sudo tc qdisc add dev TN2 parent root handle 100 taprio \
+num_tc 2 \
+map 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 \
+queues 1@0 1@1 \
+base-time 0 \
+sched-entry S 01 500000000 sched-entry S 02 500000000 \
+clockid CLOCK_TAI
+sudo iptables -t mangle -A POSTROUTING -d 1.1.1.1 -j CLASSIFY --set-class 0:1
+sudo iptables -t mangle -A POSTROUTING -d 2.2.2.2 -j CLASSIFY --set-class 0:0
+sudo brctl addbr br0 # we have to this trick because iptables don't work with replayed packets directly
+sudo brctl addif br0 TN1
+sudo brctl addif br0 TN2
+sudo ifconfig br0 up 
+sudo modprobe br_netfilter
+
+sudo tcpreplay -i TN0 -p10 --loop=0 testpackets.pcap
+sudo tcpdump -i TN3 -n
+
+```
+
+more description of the configuration, see https://www.frank-durr.de/?p=376