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|
{
config,
lib,
pkgs,
...
}:
with lib; let
cnf = config.cynerd.router;
in {
options = {
cynerd.router = {
enable = mkOption {
type = types.bool;
default = false;
description = "Enable router support";
};
wan = mkOption {
type = types.str;
description = "Interface for the router's WAN";
};
lanIP = mkOption {
type = types.str;
description = "LAN IP address";
};
dynIPStart = mkOption {
type = types.ints.between 0 256;
default = 100;
description = "Offset for the dynamic IPv4 addresses";
};
dynIPCount = mkOption {
type = types.ints.between 0 256;
default = 100;
description = "Number of dynamically assigned IPv4 addresses";
};
lanPrefix = mkOption {
type = types.ints.between 0 32;
default = 24;
description = "LAN IP network prefix length";
};
};
};
config = mkIf cnf.enable {
networking = {
interfaces = {
brlan.ipv4.addresses = [
{
address = cnf.lanIP;
prefixLength = cnf.lanPrefix;
}
];
brguest.ipv4.addresses = [
{
address = "192.168.1.1";
prefixLength = 24;
}
];
};
vlans = {
"brlan.guest" = {
interface = "brlan";
id = 100;
};
};
bridges = {
brlan.interfaces = [];
brguest.interfaces = ["brlan.guest"];
};
nat = {
enable = true;
externalInterface = cnf.wan;
internalInterfaces = ["brlan" "brguest"];
};
dhcpcd.allowInterfaces = [cnf.wan];
nameservers = ["1.1.1.1" "8.8.8.8"];
};
services.kea = {
dhcp4 = {
enable = true;
settings = {
lease-database = {
name = "/var/lib/kea/dhcp4.leases";
persist = true;
type = "memfile";
};
valid-lifetime = 4000;
renew-timer = 1000;
rebind-timer = 2000;
interfaces-config = {
interfaces = ["brlan" "brguest"];
service-sockets-max-retries = -1;
};
option-data = [
{
name = "domain-name-servers";
data = "1.1.1.1, 8.8.8.8";
}
];
subnet4 = [
{
interface = "brlan";
subnet = "${ipv4.prefix2ip cnf.lanIP cnf.lanPrefix}/${toString cnf.lanPrefix}";
pools = let
ip_start = ipv4.ipAdd cnf.lanIP cnf.lanPrefix cnf.dynIPStart;
ip_end = ipv4.ipAdd cnf.lanIP cnf.lanPrefix (cnf.dynIPStart + cnf.dynIPCount);
in [{pool = "${ip_start} - ${ip_end}";}];
option-data = [
{
name = "routers";
data = ipv4.prefix2netmask cnf.lanPrefix;
}
];
reservations = [
{
duid = "e4:6f:13:f3:d5:be";
ip-address = ipv4.ipAdd cnf.lanIP cnf.lanPrefix 60;
}
];
}
{
interface = "brguest";
subnet = "192.168.1.0/24";
pools = [{pool = "192.168.1.50 - 192.168.1.254";}];
"option-data" = [
{
name = "routers";
data = "192.168.1.1";
}
];
}
];
};
};
# TODO dhcp6
};
systemd.services.kea-dhcp4-server.after = [
"sys-subsystem-net-devices-brlan.device"
"sys-subsystem-net-devices-brguest.device"
];
services.kresd = {
enable = false;
};
networking.nftables.enable = true;
networking.firewall = {
filterForward = true;
extraForwardRules = ''
iifname "brguest" oifname != "${cnf.wan}" drop comment "prevent guest to access lan"
'';
};
};
}
|
