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{ config, pkgs, ... }:
let
iface = "hurricane";
remote = "216.218.221.42";
address = "2001:470:35:72a::2";
gateway = "2001:470:35:72a::1";
prefixLength = 64;
prefix = "2001:470:35:72a::/${toString prefixLength}";
in
{
networking = {
sits.${iface} = {
inherit remote;
ttl = 225;
};
interfaces.${iface} = {
mtu = 1440; # 1460(ppp0) - 20
ipv6.addresses =
[{ inherit prefixLength address; }];
};
iproute2 = {
enable = true;
rttablesExtraConfig = "200 hurricane";
};
firewall.extraCommands =
"iptables -A INPUT --proto 41 --source ${remote} --jump ACCEPT";
};
sops.secrets = {
"hurricane/username" = {};
"hurricane/update_key" = {};
"hurricane/tunnel_id" = {};
};
systemd.services."network-route-${iface}" = {
description = "Routing configuration of ${iface}";
wantedBy = [
"network-setup.service"
"network.target"
];
before = [ "network-setup.service" ];
bindsTo = [ "network-addresses-hurricane.service" ];
after = [ "network-pre.target" "network-addresses-hurricane.service" ];
# restart rather than stop+start this unit to prevent the
# network from dying during switch-to-configuration.
stopIfChanged = false;
serviceConfig = {
Type = "oneshot";
RemainAfterExit = true;
};
path = [ pkgs.iproute2 ];
script = ''
echo -n "adding route ${prefix}... "
ip -6 rule add from ${prefix} table hurricane || exit 1
ip -6 route add default via ${gateway} dev hurricane table hurricane || exit 1
'';
preStop = ''
echo -n "deleting route $prefix... "
ip -6 route del default via ${gateway} dev hurricane table hurricane || exit 1
ip -6 rule del from ${prefix} table hurricane || exit 1
'';
};
services.pppd.script."02-${iface}" = {
runtimeInputs = with pkgs; [ curl coreutils iproute2 iputils ];
text = ''
wan_ip="$4"
username="$(cat ${config.sops.secrets."hurricane/username".path})"
update_key="$(cat ${config.sops.secrets."hurricane/update_key".path})"
tunnel_id="$(cat ${config.sops.secrets."hurricane/tunnel_id".path})"
auth_url="https://$username:$update_key@ipv4.tunnelbroker.net/nic/update?hostname=$tunnel_id"
until curl --silent "$auth_url"; do
sleep 1
done
while [ ! -e /sys/class/net/${iface} ]; do
sleep 1 # make sure ${iface} is up
done
ip tunnel change ${iface} local "$wan_ip" mode sit
'';
};
}
|
