first pass at a hostapd service, rough around the edges

tests/wlan/configuration.nix

@@ -0,0 +1,43 @@
+{ config, pkgs, lib, ... } :
+let
+  inherit (pkgs.liminix.networking) interface address hostapd route dnsmasq;
+  inherit (pkgs.liminix.services) oneshot longrun bundle target output;
+in rec {
+  services.loopback =
+    let iface = interface { type = "loopback"; device = "lo";};
+    in bundle {
+      name = "loopback";
+      contents = [
+        (address iface { family = "inet4"; address ="127.0.0.1"; prefixLength = 8;})
+        (address iface { family = "inet6"; address ="::1"; prefixLength = 128;})
+      ];
+    };
+
+  services.wlan = interface { type = "hardware"; device = "wlan0"; };
+
+  services.hostap = hostapd (services.wlan) {
+    params = {
+      ssid = "liminix";
+      country_code = "GB";
+      hw_mode="g";
+      channel = "2";
+      wmm_enabled = 1;
+      ieee80211n = 1;
+      wpa_passphrase = "colourless green ideas";
+      auth_algs = 1; # 1=wpa2, 2=wep, 3=both
+      wpa = 2;       # 1=wpa, 2=wpa2, 3=both
+      wpa_key_mgmt = "WPA-PSK";
+      wpa_pairwise = "TKIP CCMP";   # auth for wpa (may not need this?)
+      rsn_pairwise = "CCMP";        # auth for wpa2
+    };
+  };
+
+  services.default = target {
+    name = "default";
+    contents = with services; [
+      loopback
+      hostap
+    ];
+  };
+  defaultProfile.packages = with pkgs;  [ tcpdump ] ;
+}