2020-01-10 11:13:37 +01:00
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#!/bin/bash
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set -x
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# This script can be used to set up the USB Ethernet Gadget interfaces
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2020-01-31 16:15:01 +01:00
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# on Linux. Tested on Ubuntu 19.10, kernel 5.3.0-24-generic
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2020-01-10 11:13:37 +01:00
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# USB Ethernet Gadget interface
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IF_USB=ens35u2
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# external interface
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IF_HOST=ens33
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IP_NET="10.0.0.0/24"
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IP_NETMASK="255.255.255.0"
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IP_BROADCAST="10.0.0.255"
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IP_HOST="10.0.0.1"
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IP_NUTTX="10.0.0.2"
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sudo ifconfig $IF_USB up
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ifconfig -a
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sudo ifconfig $IF_USB add $IP_HOST
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sudo ifconfig $IF_USB:0 broadcast $IP_BROADCAST netmask $IP_NETMASK
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sudo ip route delete $IP_NET
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ip route add $IP_NET dev $IF_USB src $IP_HOST
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sudo ip route add $IP_NET dev $IF_USB src $IP_HOST
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sudo ip route add $IP_NUTTX/32 dev ens35u2 src $IP_HOST
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# nat to allow NuttX to access the internet
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sudo iptables -t nat -A POSTROUTING -o $IF_HOST -j MASQUERADE
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sudo iptables -A FORWARD -i $IF_HOST -o $IF_USB -m state --state RELATED,ESTABLISHED -j ACCEPT
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sudo iptables -A FORWARD -i $IF_USB -o $IF_HOST -j ACCEPT
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ip route show
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# pinging the nuttx system should work now
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#ping -c 1 $IP_NUTTX
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