60 lines
1.8 KiB
Python
60 lines
1.8 KiB
Python
import os
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from misoclib.com.liteeth.common import *
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from misoclib.com.liteeth.generic import *
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class LiteEthPHYSimCRG(Module, AutoCSR):
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def __init__(self):
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self._reset = CSRStorage()
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# # #
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self.clock_domains.cd_eth_rx = ClockDomain()
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self.clock_domains.cd_eth_tx = ClockDomain()
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self.comb += [
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self.cd_eth_rx.clk.eq(ClockSignal()),
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self.cd_eth_tx.clk.eq(ClockSignal())
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]
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reset = self._reset.storage
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self.comb += [
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self.cd_eth_rx.rst.eq(reset),
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self.cd_eth_tx.rst.eq(reset)
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]
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class LiteEthPHYSim(Module, AutoCSR):
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def __init__(self, pads, tap="tap0", ip_address="192.168.0.14"):
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self.dw = 8
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self.submodules.crg = LiteEthPHYSimCRG()
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self.sink = sink = Sink(eth_phy_description(8))
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self.source = source = Source(eth_phy_description(8))
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self.tap = tap
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self.ip_address = ip_address
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self.comb += [
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pads.source_stb.eq(self.sink.stb),
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pads.source_data.eq(self.sink.data),
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self.sink.ack.eq(1)
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]
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self.sync += [
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self.source.stb.eq(pads.sink_stb),
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self.source.sop.eq(pads.sink_stb & ~self.source.stb),
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self.source.data.eq(pads.sink_data),
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]
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self.comb += [
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self.source.eop.eq(~pads.sink_stb & self.source.stb),
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]
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# XXX avoid use of os.system
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os.system("openvpn --mktun --dev {}".format(self.tap))
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os.system("ifconfig {} {} up".format(self.tap, self.ip_address))
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os.system("mknod /dev/net/{} c 10 200".format(self.tap))
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def do_exit(self, *args, **kwargs):
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# XXX avoid use of os.system
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os.system("rm -f /dev/net/{}".format(self.tap))
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os.system("openvpn --rmtun --dev {}".format(self.tap))
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