From 2be0042d4288a5eae3b28c0d2db2fb855e8a82fe Mon Sep 17 00:00:00 2001
From: tv <tv@krebsco.de>
Date: Mon, 26 Nov 2018 14:49:13 +0100
Subject: [PATCH] tv dnsmasq service: init
---
tv/3modules/default.nix | 1 +
tv/3modules/dnsmasq.nix | 57 +++++++++++++++++++++++++++++++++++++++++
2 files changed, 58 insertions(+)
create mode 100644 tv/3modules/dnsmasq.nix
diff --git a/tv/3modules/default.nix b/tv/3modules/default.nix
index 493cc8b72..6172feb03 100644
--- a/tv/3modules/default.nix
+++ b/tv/3modules/default.nix
@@ -1,6 +1,7 @@
{
imports = [
./charybdis
+ ./dnsmasq.nix
./ejabberd
./hosts.nix
./iptables.nix
diff --git a/tv/3modules/dnsmasq.nix b/tv/3modules/dnsmasq.nix
new file mode 100644
index 000000000..ec927f98a
--- /dev/null
+++ b/tv/3modules/dnsmasq.nix
@@ -0,0 +1,57 @@
+with import <stockholm/lib>;
+{ config, ... }: let
+ cfg = config.tv.dnsmasq;
+in {
+
+ options.tv.dnsmasq = {
+ enable = mkEnableOption "tv.dnsmasq";
+ dhcp-range = mkOption {
+ type = types.str;
+ };
+ interface = mkOption {
+ type = types.str;
+ };
+ address = mkOption {
+ type = types.str;
+ };
+ prefixLength = mkOption {
+ type = types.addCheck types.int (x: x >= 0 && x <= 32);
+ };
+ };
+
+ config = mkIf cfg.enable (mkMerge [
+ {
+ networking.dhcpcd.denyInterfaces = [ cfg.interface ];
+ services.dnsmasq.resolveLocalQueries = false;
+ networking.interfaces.${cfg.interface} = {
+ ipv4.addresses = singleton {
+ address = cfg.address;
+ prefixLength = cfg.prefixLength;
+ };
+ };
+ services.dnsmasq.enable = true;
+ services.dnsmasq.extraConfig = ''
+ dhcp-range=${cfg.dhcp-range}
+ interface=${cfg.interface}
+ '';
+ tv.iptables.extra.filter.INPUT = [
+ "-i ${cfg.interface} -p tcp -m tcp --dport bootps -j ACCEPT"
+ "-i ${cfg.interface} -p udp -m udp --dport bootps -j ACCEPT"
+ "-i ${cfg.interface} -p tcp -m tcp --dport domain -j ACCEPT"
+ "-i ${cfg.interface} -p udp -m udp --dport domain -j ACCEPT"
+ ];
+ }
+ {
+ # enable forwarding
+ boot.kernel.sysctl."net.ipv4.ip_forward" = true;
+ tv.iptables.extra.filter.FORWARD = [
+ "-m state --state RELATED,ESTABLISHED -j ACCEPT"
+ "-i ${cfg.interface} -j ACCEPT"
+ ];
+ tv.iptables.extra.nat.POSTROUTING = [
+ "-j MASQUERADE"
+ ];
+ }
+ ]);
+
+}