liteeth/phy/sim: create ethernet tap in __init__ and destroy it in do_exit

diff --git a/misoclib/com/liteeth/phy/sim.py b/misoclib/com/liteeth/phy/sim.py
index 8b81576b2b4a8205761de16a4d3b1ea589d745c4..da7124e6205e7cffef5710ad1fecc970c72a8f40 100644 (file)
--- a/misoclib/com/liteeth/phy/sim.py
+++ b/misoclib/com/liteeth/phy/sim.py
@@ -1,3 +1,5 @@
+import os
+
 from misoclib.com.liteeth.common import *
 from misoclib.com.liteeth.generic import *
 
@@ -21,11 +23,13 @@ class LiteEthPHYSimCRG(Module, AutoCSR):
                ]
 
 class LiteEthPHYSim(Module, AutoCSR):
-       def __init__(self, pads):
+       def __init__(self, pads, tap="tap0", ip_address="192.168.0.14"):
                self.dw = 8
                self.submodules.crg = LiteEthPHYSimCRG()
                self.sink = sink = Sink(eth_phy_description(8))
                self.source = source = Source(eth_phy_description(8))
+               self.tap = tap
+               self.ip_address = ip_address
 
                self.comb += [
                        pads.source_stb.eq(self.sink.stb),
@@ -41,3 +45,13 @@ class LiteEthPHYSim(Module, AutoCSR):
                self.comb += [
                        self.source.eop.eq(~pads.sink_stb & self.source.stb),
                ]
+
+               # XXX avoid use of os.system
+               os.system("openvpn --mktun --dev {}".format(self.tap))
+               os.system("ifconfig {} {} up".format(self.tap, self.ip_address))
+               os.system("mknod /dev/net/{} c 10 200".format(self.tap))
+
+       def do_exit(self, *args, **kwargs):
+               # XXX avoid use of os.system
+               os.system("rm -f /dev/net/{}".format(self.tap))
+               os.system("openvpn --rmtun --dev {}".format(self.tap))