72 lines
2.2 KiB
Bash
72 lines
2.2 KiB
Bash
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#!/bin/bash
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#****************************************************************************
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# tools/simhostroute.sh
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#
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership. The
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# ASF licenses this file to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance with the
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# License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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#****************************************************************************
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# USB Ethernet Gadget interface helper script - sets up nuttx to access
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# the internet via a host route and IP Tables.
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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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if [ $# != 3 ]; then
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echo "Usage: $0 <main-interface> <usb-net-interface> <on|off>"
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exit 1
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fi
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IF_HOST=$1
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IF_USB=$2
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STATUS=$3
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net_off() {
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ip route delete $IP_NET
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ip route delete $IP_NUTTX/32
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# delete nat rules to clean up
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iptables -t nat -D POSTROUTING -o $IF_HOST -j MASQUERADE
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iptables -D FORWARD -i $IF_HOST -o $IF_USB -m state --state RELATED,ESTABLISHED -j ACCEPT
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iptables -D FORWARD -i $IF_USB -o $IF_HOST -j ACCEPT
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ip route show
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ifconfig $IF_USB down
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}
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if [ "$STATUS" == "on" ]; then
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net_off
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ifconfig $IF_USB up
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ifconfig -a
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ifconfig $IF_USB add $IP_HOST
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ifconfig $IF_USB:0 broadcast $IP_BROADCAST netmask $IP_NETMASK
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ip route add $IP_NET dev $IF_USB src $IP_HOST
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ip route add $IP_NUTTX/32 dev $IF_USB src $IP_HOST
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# nat to allow NuttX to access the internet
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iptables -t nat -A POSTROUTING -o $IF_HOST -j MASQUERADE
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iptables -A FORWARD -i $IF_HOST -o $IF_USB -m state --state RELATED,ESTABLISHED -j ACCEPT
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iptables -A FORWARD -i $IF_USB -o $IF_HOST -j ACCEPT
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ip route show
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else
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net_off
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fi
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