nuttx/tools/simhostroute.sh
Adam Feuer 7fa1486181 simulator network host route helper script and docs
Squashed commit of the following:

commit 685951b5385062035ac558df1112353c9441c910
Author: Adam Feuer <adam@starcat.io>
Date:   Mon Feb 24 16:33:00 2020 -0800

    fixed typo in readme

commit ad1d3289b48af0de3095e3f365429017e57278b3
Author: Adam Feuer <adam@starcat.io>
Date:   Mon Feb 24 16:07:48 2020 -0800

    simulator host route helper script and docs

    Squashed commit of the following:

    commit cf5cddcf55a155303cb5abb1aa026f6dcaf369ca
    Author: Adam Feuer <adam@starcat.io>
    Date:   Mon Feb 24 15:50:40 2020 -0800

        syslog on console to fix compile error

    commit def1bb73fcfbc8b115c55d9f4544b97d583807f2
    Author: Adam Feuer <adam@starcat.io>
    Date:   Mon Feb 24 15:46:13 2020 -0800

        formatting as per PR feedback; removed ping

    commit b179fd8831b77fbbe85527a4ab3161e1f1ca1e43
    Author: Adam Feuer <adam@starcat.io>
    Date:   Mon Feb 24 15:45:49 2020 -0800

        formatting as per PR feedback

    commit e3280bede9798d9a00b118e126c02ceab497e33a
    Author: Adam Feuer <adam@starcat.io>
    Date:   Mon Feb 24 13:56:50 2020 -0800

        add simhostroute.sh description to readme

    commit 09a6b0ca3bacf005c2a79102141ae8cc3eb91849
    Author: Adam Feuer <adam@starcat.io>
    Date:   Sun Feb 23 17:38:40 2020 -0800

        fixed error in simhostroute.sh usage docs

    commit d838582119d43ee2002ce3808051c82b23e98c58
    Author: Adam Feuer <adam@starcat.io>
    Date:   Sun Feb 23 17:28:35 2020 -0800

        added tcpblaster defconfig and updated docs

    commit af3d2d6591f12d1127027fdd363858052094e624
    Author: Adam Feuer <adam@starcat.io>
    Date:   Sun Feb 23 17:21:29 2020 -0800

        added info about capabilities and running as root

    commit 6359cfdfedefc818b169455401942d3d33a59f41
    Author: Adam Feuer <adam@starcat.io>
    Date:   Sun Feb 23 17:20:42 2020 -0800

        updated network linux readme

    commit 47feb08aa74e4b1fc6c802567bc777d31e7c9a83
    Author: Adam Feuer <adam@starcat.io>
    Date:   Sun Feb 23 17:09:04 2020 -0800

        initial addition
2020-02-24 20:20:25 -06:00

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#!/bin/bash
#****************************************************************************
# tools/simhostroute.sh
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership. The
# ASF licenses this file to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance with the
# License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
#****************************************************************************
# Helper script to set up host route to NuttX simulator
# and set up IP Tables to allow it to access the
# internet.
#
# This script needs to be run as root.
#
# Note that on Linux you may also have to set kernel capabilities
# on the nuttx executable to allow NuttX to access the tap device:
#
# sudo setcap cap_net_admin+ep ./nuttx
if [ $# != 2 ]; then
echo "Usage: $0 <interface> <on|off>"
exit 1
fi
IF_HOST=$1
STATUS=$2
IF_BRIDGE=nuttx0
IP_NET="10.0.1.0/24"
IP_NETMASK="255.255.255.0"
IP_BROADCAST="10.0.0.255"
IP_HOST="10.0.1.1"
IP_NUTTX="10.0.1.2"
if [ "$STATUS" == "on" ]; then
ip link add $IF_BRIDGE type bridge
ifconfig $IF_BRIDGE $IP_HOST
ifconfig $IF_BRIDGE up
ifconfig -a
ip addr add $IP_HOST dev $IF_BRIDGE
ifconfig $IF_BRIDGE netmask $IP_NETMASK
ip route delete $IP_NET
ip route add $IP_NET dev $IF_BRIDGE src $IP_HOST
ip route add $IP_NUTTX/32 dev $IF_BRIDGE src $IP_HOST
# nat to allow NuttX to access the internet
iptables -t nat -A POSTROUTING -o $IF_HOST -j MASQUERADE
iptables -A FORWARD -i $IF_HOST -o $IF_BRIDGE -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -A FORWARD -i $IF_BRIDGE -o $IF_HOST -j ACCEPT
ip route show
else
ip route delete $IP_NET
ip route delete $IP_NUTTX/32
# delete nat rules to clean up
iptables -t nat -A POSTROUTING -o $IF_HOST -j MASQUERADE
iptables -D FORWARD -i $IF_HOST -o $IF_BRIDGE -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -D FORWARD -i $IF_BRIDGE -o $IF_HOST -j ACCEPT
ip link delete $IF_BRIDGE type bridge
ip route show
fi