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add ipv6 support, net module and wireguard vpn

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Fabian Montero 2025-01-25 00:10:50 -06:00
parent 63a190bc7c
commit 4a7bda944f
Signed by: fabian
GPG key ID: 1FFAC35E1798174F
5 changed files with 328 additions and 4 deletions
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1
sys/modules/default.nix
View file

@ -13,5 +13,6 @@
./android.nix
./users.nix
./bluetooth.nix
./net.nix
];
}

186
sys/modules/net.nix Normal file
View file

@ -0,0 +1,186 @@
{
config,
lib,
...
}:
with lib; {
options.local.sys.nets = with lib.types;
mkOption {
readOnly = true;
type = attrsOf (submodule ({config, ...}: {
options = let
v4config = config.v4;
v6config = config.v6;
in {
hosts = mkOption {
default = {};
type = attrsOf (submodule {
options = {
v4 = mkOption {
default = null;
type = nullOr (submodule ({config, ...}: {
options = {
suffix = mkOption {
type = str;
};
address = mkOption {
type = str;
readOnly = true;
};
cidr = mkOption {
type = str;
readOnly = true;
};
single = mkOption {
type = str;
readOnly = true;
};
};
config = {
address =
if v4config.bits == 0
then config.suffix
else if v4config.bits == 32
then v4config.subnet
else "${v4config.prefix}.${config.suffix}";
cidr = "${config.address}/${toString v4config.bits}";
single = "${config.address}/32";
};
}));
};
v6 = mkOption {
default = null;
type = nullOr (submodule ({config, ...}: {
options = {
suffix = mkOption {
type = str;
};
address = mkOption {
type = str;
readOnly = true;
};
cidr = mkOption {
type = str;
readOnly = true;
};
single = mkOption {
type = str;
readOnly = true;
};
};
config = {
address = let
hextets = fragment: length (splitString ":" fragment);
separator =
if doubleColon
then "::"
else ":";
doubleColon = hextets v6config.prefix + hextets config.suffix < 8;
joined =
if v6config.bits == 128
then v6config.prefix
else if v6config.bits == 0
then config.suffix
else "${v6config.prefix}${separator}${config.suffix}";
in
joined;
cidr = "${config.address}/${toString v6config.bits}";
single = "${config.address}/128";
};
}));
};
};
});
};
v4 = mkOption {
default = null;
type = nullOr (submodule ({config, ...}: {
options = {
bits = mkOption {
type = enum [0 8 16 24 32];
};
prefix = mkOption {
type = str;
};
subnet = mkOption {
type = str;
readOnly = true;
};
cidr = mkOption {
type = str;
readOnly = true;
};
};
config = {
cidr = "${config.subnet}/${toString config.bits}";
subnet =
if config.bits != 0
then config.prefix + strings.replicate (4 - config.bits / 8) ".0"
else "0.0.0.0";
};
}));
};
v6 = mkOption {
default = null;
type = nullOr (submodule ({config, ...}: {
options = {
bits = mkOption {
type =
addCheck (ints.between 0 128) (b: mod b 4 == 0)
// {
description = "IPv6 subnet bits at nibble boundary";
};
};
prefix = mkOption {
type = str;
};
subnet = mkOption {
type = str;
readOnly = true;
};
cidr = mkOption {
type = str;
readOnly = true;
};
};
config = {
cidr = "${config.subnet}/${toString config.bits}";
subnet =
if config.bits == 128 || length (splitString "::" config.prefix) > 1
then config.prefix
else "${config.prefix}::";
};
}));
};
};
}));
};
}

61
sys/platforms/vps/default.nix
View file

@ -13,6 +13,7 @@ with lib; {
flakes.impermanence.nixosModule
./hardware-configuration.nix
./srv
./networkMap.nix
];
local.sys = {
@ -50,9 +51,67 @@ with lib; {
};
};
systemd.extraConfig = ''
networking.firewall.allowedUDPPorts = [51820]; #TODO
systemd = {
extraConfig = ''
DefaultTimeoutStartSec=900s
'';
network = let
inherit (config.local.sys) nets;
in {
enable = true;
netdevs = {
wg-vpn = {
netdevConfig = {
Name = "wg-vpn";
Kind = "wireguard";
};
wireguardConfig = {
PrivateKeyFile = "/var/trust/wg/vpn/key.priv";
ListenPort = "51820";
};
wireguardPeers = [
{
PublicKey = "wwUp3Uu/rSxbp+6J745O+cpnZHGWOJYWfWEsTjRE3yU=";
PresharedKeyFile = "/var/trust/wg/vpn/vps-posixlycorrect.psk";
AllowedIPs = ["${nets.vpn-posixlycorrect.v6.cidr}"];
}
{
PublicKey = "YFqg/ED26KygSRSmGzvUXpwnXPqMOI3R3caVfAtHVks=";
PresharedKeyFile = "/var/trust/wg/vpn/vps-pixel8.psk";
AllowedIPs = ["${nets.vpn-pixel8.v6.cidr}"];
}
];
};
};
networks = {
wg-vpn = {
name = "wg-vpn";
networkConfig = {
Address = [
nets.vpn-vps.hosts.vps.v6.cidr
];
};
routes = [
{
Destination = nets.vpn.v6.cidr;
}
{
Source = nets.vpn.v6.cidr;
}
];
};
};
};
};
time.timeZone = "Europe/Amsterdam";
}

78
sys/platforms/vps/networkMap.nix Normal file
View file

@ -0,0 +1,78 @@
{
config,
pkgs,
lib,
flakes,
...
}:
with lib; {
local.sys.nets = {
default = {
v4 = {
bits = 32;
prefix = "37.205.12.34";
};
v6 = {
bits = 64;
prefix = "2a03:3b40:fe:102";
};
hosts = {
vps.v6.suffix = "1";
vps.v4.suffix = "";
};
};
vpn = {
v6 = {
bits = 48;
prefix = "2a03:3b40:2b";
};
};
vpn-vps = {
v6 = {
bits = 64;
prefix = "2a03:3b40:2b:1000";
};
hosts = {
vps.v6.suffix = "1";
};
};
vpn-posixlycorrect = {
v6 = {
bits = 64;
prefix = "2a03:3b40:2b:1001";
};
hosts = {
posixlycorrect.v6.suffix = "1";
};
};
vpn-pixel8 = {
v6 = {
bits = 64;
prefix = "2a03:3b40:2b:1002";
};
hosts = {
pixel8.v6.suffix = "1";
};
};
vpn-t14 = {
v6 = {
bits = 64;
prefix = "2a03:3b40:2b:1003";
};
hosts = {
t14.v6.suffix = "1";
};
};
};
}

2
sys/platforms/vps/srv/net.nix
View file

@ -5,7 +5,7 @@
}:
with lib; {
networking = {
nftables.enable = true;
nftables.enable = false; # learn how to use this later
firewall = {
enable = true;
allowedTCPPorts = [80 443];