From ecc09522d9073386c91fc61838ca418489ab648f Mon Sep 17 00:00:00 2001
From: lassulus <lassulus@lassul.us>
Date: Thu, 3 May 2018 12:13:14 +0200
Subject: l cabal.r: use as AP

---
 lass/1systems/cabal/config.nix |  1 +
 lass/2configs/AP.nix           | 77 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 78 insertions(+)
 create mode 100644 lass/2configs/AP.nix

diff --git a/lass/1systems/cabal/config.nix b/lass/1systems/cabal/config.nix
index 88f642d6b..9ac3cb681 100644
--- a/lass/1systems/cabal/config.nix
+++ b/lass/1systems/cabal/config.nix
@@ -15,6 +15,7 @@
     <stockholm/lass/2configs/fetchWallpaper.nix>
     <stockholm/lass/2configs/games.nix>
     <stockholm/lass/2configs/bitcoin.nix>
+    <stockholm/lass/2configs/AP.nix>
   ];
 
   krebs.build.host = config.krebs.hosts.cabal;
diff --git a/lass/2configs/AP.nix b/lass/2configs/AP.nix
new file mode 100644
index 000000000..5ce7cfff8
--- /dev/null
+++ b/lass/2configs/AP.nix
@@ -0,0 +1,77 @@
+{ config, pkgs, ... }:
+with import <stockholm/lib>;
+let
+  wifi = "wlp0s29u1u2";
+in {
+  boot.extraModulePackages = [
+    pkgs.linuxPackages.rtl8814au
+  ];
+  networking.networkmanager.unmanaged = [ wifi ];
+
+  systemd.services.hostapd = {
+    description = "hostapd wireless AP";
+    path = [ pkgs.hostapd ];
+    wantedBy = [ "network.target" ];
+
+    after = [ "${wifi}-cfg.service" "nat.service" "bind.service" "dhcpd.service" "sys-subsystem-net-devices-${wifi}.device" ];
+
+    serviceConfig = {
+      ExecStart = "${pkgs.hostapd}/bin/hostapd ${pkgs.writeText "hostapd.conf" ''
+        interface=${wifi}
+        hw_mode=a
+        channel=36
+        ieee80211d=1
+        country_code=DE
+        ieee80211n=1
+        ieee80211ac=1
+        wmm_enabled=1
+
+        # 5ghz
+        ssid=krebsing
+        auth_algs=1
+        wpa=2
+        wpa_key_mgmt=WPA-PSK
+        rsn_pairwise=CCMP
+        wpa_passphrase=aidsballz
+      ''}";
+      Restart = "always";
+    };
+  };
+
+  networking.interfaces.${wifi}.ipv4.addresses = [
+    { address = "10.99.0.1"; prefixLength = 24; }
+  ];
+  services.dhcpd4 = {
+    enable = true;
+    interfaces = [ wifi ];
+    extraConfig = ''
+      option subnet-mask 255.255.255.0;
+      option routers 10.99.0.1;
+      option domain-name-servers 1.1.1.1, 8.8.8.8;
+      subnet 10.99.0.0 netmask 255.255.255.0 {
+        range 10.99.0.100 10.99.0.200;
+      }
+    '';
+  };
+
+  boot.kernel.sysctl."net.ipv4.ip_forward" = 1;
+  krebs.iptables.tables.filter.FORWARD.rules = [
+    { v6 = false; predicate = "-d 10.99.0.0/24 -o ${wifi} -m conntrack --ctstate RELATED,ESTABLISHED"; target = "ACCEPT"; }
+    { v6 = false; predicate = "-s 10.99.0.0/24 -i ${wifi}"; target = "ACCEPT"; }
+    { v6 = false; predicate = "-i ${wifi} -o ${wifi}"; target = "ACCEPT"; }
+    { v6 = false; predicate = "-o ${wifi}"; target = "REJECT --reject-with icmp-port-unreachable"; }
+    { v6 = false; predicate = "-i ${wifi}"; target = "REJECT --reject-with icmp-port-unreachable"; }
+  ];
+  krebs.iptables.tables.nat.PREROUTING.rules = [
+    { v6 = false; predicate = "-s 10.99.0.0/24"; target = "ACCEPT"; precedence = 1000; }
+  ];
+  krebs.iptables.tables.nat.POSTROUTING.rules = [
+    #TODO find out what this is about?
+    { v6 = false; predicate = "-s 10.99.0.0/24 -d 224.0.0.0/24"; target = "RETURN"; }
+    { v6 = false; predicate = "-s 10.99.0.0/24 -d 255.255.255.255"; target = "RETURN"; }
+
+    { v6 = false; predicate = "-s 10.99.0.0/24 ! -d 10.99.0.0/24"; target = "MASQUERADE"; }
+    { v6 = false; predicate = "-s 10.99.0.0/24 ! -d 10.99.0.0/24 -p tcp"; target = "MASQUERADE --to-ports 1024-65535"; }
+    { v6 = false; predicate = "-s 10.99.0.0/24 ! -d 10.99.0.0/24 -p udp"; target = "MASQUERADE --to-ports 1024-65535"; }
+  ];
+}
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