some config files for IPv6 (DHCPv6-PD over PPPoE)

ipv6down.sh

#!/usr/bin/bash

#
# it is file -- /etc/ppp/ipv6-down.d/99-custom-internet.sh
#

if [ -z "$IFNAME" ] || [ "$LINKNAME" != "domru" ]
then
  true
  exit
fi

lan_iface="br-lan"

ip6tables -w -F CUSTOM_INTERNET__FORWARD
ip6tables -w -t mangle -F CUSTOM_INTERNET__FORWARD

dhcpcd -x "$IFNAME"
rm /var/run/custom-internet-dhcpcd.conf
rm /var/run/custom-internet-dhcpcd-hooks
rm /var/lib/dhcpcd/dhcpcd-"$IFNAME".lease6

true

ipv6up.sh

#!/usr/bin/bash

#
# it is file -- /etc/ppp/ipv6-up.d/99-custom-internet.sh
#

if [ -z "$IFNAME" ] || [ "$LINKNAME" != "domru" ]
then
  true
  exit
fi

lan_iface="br-lan"

ip6tables -w -t mangle -F CUSTOM_INTERNET__FORWARD
ip6tables -w -t mangle -A CUSTOM_INTERNET__FORWARD -o "$IFNAME" -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu

ip6tables -w -F CUSTOM_INTERNET__FORWARD
ip6tables -w -A CUSTOM_INTERNET__FORWARD -i "$lan_iface" -o "$IFNAME" -j ACCEPT
ip6tables -w -A CUSTOM_INTERNET__FORWARD -i "$IFNAME" -o "$lan_iface" -j ACCEPT

cat >/var/run/custom-internet-dhcpcd.conf <<__END__
ipv6only
noipv6rs
interface $IFNAME
ia_pd 1
__END__

cat >/var/run/custom-internet-dhcpcd-hooks <<__END__
#!/usr/bin/bash

#echo "**********" >>/root/hooks.log
#date >>/root/hooks.log
#env >>/root/hooks.log
#echo "**********" >>/root/hooks.log

if [ "\$reason" == "REBIND6" ] && [ "\$new_dhcp6_ia_pd1_prefix1/\$new_dhcp6_ia_pd1_prefix1_length" == "\$old_dhcp6_ia_pd1_prefix1/\$old_dhcp6_ia_pd1_prefix1_length" ]
then
  true  
  exit
fi

if [ "\$reason" == "BOUND6" ] || [ "\$reason" == "REBIND6" ] || [ "\$reason" == "STOP6" ]
then
  if [ -f /var/run/custom-internet-radvd.conf ]
  then
    rm /var/run/custom-internet-radvd.conf
  fi
  if [ -f /var/run/custom-internet-radvd.pid ]
  then
    radvd_pid="\$(cat /var/run/custom-internet-radvd.pid)"
    rm /var/run/custom-internet-radvd.pid
    kill "\$radvd_pid"
  fi
  if [ -f /var/run/custom-internet-dhcpcd-addr.data ]
  then
    ip -6 addr del "\$(cat /var/run/custom-internet-dhcpcd-addr.data)" dev $lan_iface
    rm /var/run/custom-internet-dhcpcd-addr.data
  fi
fi

if [ "\$reason" == "BOUND6" ] || [ "\$reason" == "REBIND6" ]
then
  if [ "\$new_dhcp6_ia_pd1_prefix1_length" == "64" ]
  then
    new_dhcp6_addr="\${new_dhcp6_ia_pd1_prefix1}1/\$new_dhcp6_ia_pd1_prefix1_length"
    
    echo "\$new_dhcp6_addr" >/var/run/custom-internet-dhcpcd-addr.data
    ip -6 addr add "\$new_dhcp6_addr" dev $lan_iface
    
    cat >/var/run/custom-internet-radvd.conf <<__INNER_END__
interface $lan_iface {
  AdvSendAdvert on;
  
  MaxRtrAdvInterval 10;     # hack for broken mobile wifi-devices (normal default is 600)
  AdvDefaultLifetime 1800;  # hack for broken mobile wifi-devices (normal default is MaxRtrAdvInterval*3)
  
  prefix \$new_dhcp6_ia_pd1_prefix1/\$new_dhcp6_ia_pd1_prefix1_length
  {
  };
  
  RDNSS 2001:4860:4860::8888 2001:4860:4860::8844
  {
  };
};
__INNER_END__
    
    radvd -C /var/run/custom-internet-radvd.conf -p /var/run/custom-internet-radvd.pid
  fi
fi

true
__END__
chmod +x /var/run/custom-internet-dhcpcd-hooks

dhcpcd -B -f /var/run/custom-internet-dhcpcd.conf -c /var/run/custom-internet-dhcpcd-hooks "$IFNAME" &

true