unplugged-system/external/ot-br-posix/script/_ipforward

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#!/bin/bash
#
# Copyright (c) 2017, The OpenThread Authors.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# 3. Neither the name of the copyright holder nor the
# names of its contributors may be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
# Description:
# This script manipulates ip forward configuration.
#
SYSCTL_IP_FORWARD=/etc/sysctl.d/60-otbr-ip-forward.conf
ipforward_install()
{
sudo tee $SYSCTL_IP_FORWARD <<EOF
net.ipv6.conf.all.forwarding = 1
net.ipv4.ip_forward = 1
EOF
# /proc/sys/net/ipv6/conf/* files are read-only in docker
# when building the image.
if without DOCKER; then
ipforward_enable
fi
}
ipforward_uninstall()
{
test ! -f $SYSCTL_IP_FORWARD || sudo rm -v $SYSCTL_IP_FORWARD
}
ipforward_enable()
{
echo 1 | sudo tee /proc/sys/net/ipv6/conf/all/forwarding || die 'Failed to enable IPv6 forwarding!'
echo 1 | sudo tee /proc/sys/net/ipv4/ip_forward || die 'Failed to enable IPv4 forwarding!'
}