112 lines
3.7 KiB
Bash
112 lines
3.7 KiB
Bash
#!/bin/bash
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#
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# Copyright (c) 2021, The OpenThread Authors.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# 3. Neither the name of the copyright holder nor the
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# names of its contributors may be used to endorse or promote products
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# derived from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# Description:
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# This script sets up border routing configurations.
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#
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readonly INFRA_IF_NAME="${INFRA_IF_NAME:-wlan0}"
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readonly SYSCTL_ACCEPT_RA_FILE="/etc/sysctl.d/60-otbr-accept-ra.conf"
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readonly DHCPCD_CONF_FILE="/etc/dhcpcd.conf"
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readonly DHCPCD_CONF_BACKUP_FILE="$DHCPCD_CONF_FILE.orig"
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accept_ra_install()
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{
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sudo tee $SYSCTL_ACCEPT_RA_FILE <<EOF
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net.ipv6.conf.${INFRA_IF_NAME}.accept_ra = 2
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net.ipv6.conf.${INFRA_IF_NAME}.accept_ra_rt_info_max_plen = 64
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EOF
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}
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accept_ra_uninstall()
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{
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test ! -f $SYSCTL_ACCEPT_RA_FILE || sudo rm -v $SYSCTL_ACCEPT_RA_FILE
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}
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accept_ra_enable()
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{
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with BORDER_ROUTING || return 0
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if [ -f /proc/sys/net/ipv6/conf/"${INFRA_IF_NAME}"/accept_ra ]; then
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echo 2 | sudo tee /proc/sys/net/ipv6/conf/"${INFRA_IF_NAME}"/accept_ra || die 'Failed to enable IPv6 RA!'
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fi
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if [ -f /proc/sys/net/ipv6/conf/"${INFRA_IF_NAME}"/accept_ra_rt_info_max_plen ]; then
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echo 64 | sudo tee /proc/sys/net/ipv6/conf/"${INFRA_IF_NAME}"/accept_ra_rt_info_max_plen || die 'Failed to enable IPv6 RIO!'
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fi
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}
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# This function disables IPv6 support in dhcpcd.
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#
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# dhcpcd on raspberry Pi enables IPv6 support by default. The problem with
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# dhcpcd is that it does't support Route Information Option (RIO), so we need
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# to rely on the kernel implementation. dhcpcd will force set accept_ra to 0
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# for all interfaces it is currently running on, if IPv6 is enabled. This
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# conflicts with our accept_ra* configurations.
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#
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dhcpcd_disable_ipv6()
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{
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if [ -f $DHCPCD_CONF_FILE ]; then
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sudo cp $DHCPCD_CONF_FILE $DHCPCD_CONF_BACKUP_FILE
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sudo tee -a $DHCPCD_CONF_FILE <<EOF
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noipv6
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noipv6rs
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EOF
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fi
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}
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# This function enables IPv6 support in dhcpcd.
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dhcpcd_enable_ipv6()
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{
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if [ -f $DHCPCD_CONF_BACKUP_FILE ]; then
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sudo cp $DHCPCD_CONF_BACKUP_FILE $DHCPCD_CONF_FILE
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fi
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}
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border_routing_uninstall()
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{
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with BORDER_ROUTING || return 0
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accept_ra_uninstall
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dhcpcd_enable_ipv6
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}
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border_routing_install()
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{
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with BORDER_ROUTING || return 0
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dhcpcd_disable_ipv6
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accept_ra_install
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# /proc/sys/net/ipv6/conf/* files are read-only in docker
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# when building the image.
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if without DOCKER; then
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accept_ra_enable
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fi
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}
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