1#!/bin/bash 2# 3# Copyright (c) 2021, The OpenThread Authors. 4# All rights reserved. 5# 6# Redistribution and use in source and binary forms, with or without 7# modification, are permitted provided that the following conditions are met: 8# 1. Redistributions of source code must retain the above copyright 9# notice, this list of conditions and the following disclaimer. 10# 2. Redistributions in binary form must reproduce the above copyright 11# notice, this list of conditions and the following disclaimer in the 12# documentation and/or other materials provided with the distribution. 13# 3. Neither the name of the copyright holder nor the 14# names of its contributors may be used to endorse or promote products 15# derived from this software without specific prior written permission. 16# 17# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 18# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 21# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27# POSSIBILITY OF SUCH DAMAGE. 28# 29# Description: 30# This script sets up border routing configurations. 31# 32 33INFRA_IF_NAME="${INFRA_IF_NAME:-wlan0}" 34readonly INFRA_IF_NAME 35 36SYSCTL_ACCEPT_RA_FILE="/etc/sysctl.d/60-otbr-accept-ra.conf" 37readonly SYSCTL_ACCEPT_RA_FILE 38 39DHCPCD_CONF_FILE="/etc/dhcpcd.conf" 40readonly DHCPCD_CONF_FILE 41 42DHCPCD_CONF_BACKUP_FILE="$DHCPCD_CONF_FILE.orig" 43readonly DHCPCD_CONF_BACKUP_FILE 44 45accept_ra_install() 46{ 47 sudo tee $SYSCTL_ACCEPT_RA_FILE <<EOF 48net.ipv6.conf.${INFRA_IF_NAME}.accept_ra = 2 49net.ipv6.conf.${INFRA_IF_NAME}.accept_ra_rt_info_max_plen = 64 50EOF 51} 52 53accept_ra_uninstall() 54{ 55 test ! -f $SYSCTL_ACCEPT_RA_FILE || sudo rm -v $SYSCTL_ACCEPT_RA_FILE 56} 57 58accept_ra_enable() 59{ 60 with BORDER_ROUTING || return 0 61 62 if [ -f /proc/sys/net/ipv6/conf/"${INFRA_IF_NAME}"/accept_ra ]; then 63 echo 2 | sudo tee /proc/sys/net/ipv6/conf/"${INFRA_IF_NAME}"/accept_ra || die 'Failed to enable IPv6 RA!' 64 fi 65 66 if [ -f /proc/sys/net/ipv6/conf/"${INFRA_IF_NAME}"/accept_ra_rt_info_max_plen ]; then 67 echo 64 | sudo tee /proc/sys/net/ipv6/conf/"${INFRA_IF_NAME}"/accept_ra_rt_info_max_plen || die 'Failed to enable IPv6 RIO!' 68 fi 69} 70 71# This function disables IPv6 support in dhcpcd. 72# 73# dhcpcd on raspberry Pi enables IPv6 support by default. The problem with 74# dhcpcd is that it does't support Route Information Option (RIO), so we need 75# to rely on the kernel implementation. dhcpcd will force set accept_ra to 0 76# for all interfaces it is currently running on, if IPv6 is enabled. This 77# conflicts with our accept_ra* configurations. 78# 79dhcpcd_disable_ipv6() 80{ 81 if [ -f $DHCPCD_CONF_FILE ]; then 82 sudo cp $DHCPCD_CONF_FILE $DHCPCD_CONF_BACKUP_FILE 83 sudo tee -a $DHCPCD_CONF_FILE <<EOF 84noipv6 85noipv6rs 86EOF 87 fi 88} 89 90# This function enables IPv6 support in dhcpcd. 91dhcpcd_enable_ipv6() 92{ 93 if [ -f $DHCPCD_CONF_BACKUP_FILE ]; then 94 sudo cp $DHCPCD_CONF_BACKUP_FILE $DHCPCD_CONF_FILE 95 fi 96} 97 98border_routing_uninstall() 99{ 100 with BORDER_ROUTING || return 0 101 102 accept_ra_uninstall 103 dhcpcd_enable_ipv6 104} 105 106border_routing_install() 107{ 108 with BORDER_ROUTING || return 0 109 110 dhcpcd_disable_ipv6 111 accept_ra_install 112 113 # /proc/sys/net/ipv6/conf/* files are read-only in docker 114 # when building the image. 115 if without DOCKER; then 116 accept_ra_enable 117 fi 118} 119