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 ] ;
+}

tests/wlan/run.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env sh
+
+cleanup(){
+    if test -e foo.pid && test -d /proc/`cat foo.pid` ; then
+	echo "killing qemu"
+	kill `cat foo.pid`
+    fi
+}
+trap cleanup EXIT
+fatal(){
+    err=$?
+    echo "FAIL: command $(eval echo $BASH_COMMAND) exited with code $err"
+    exit $err
+}
+trap fatal ERR
+
+NIXPKGS_ALLOW_UNSUPPORTED_SYSTEM=1 nix-build '<liminix>' -I liminix-config=./configuration.nix --arg device "import <liminix/devices/qemu.nix>" -A outputs.default $*
+
+
+
+../../scripts/run-qemu.sh \
+    --background foo.sock \
+    result/vmlinux result/squashfs \
+
+nix-shell -p expect --run "expect wait-for-wlan.expect"

tests/wlan/wait-for-wlan.expect

@@ -0,0 +1,21 @@
+set timeout 60
+
+spawn socat unix-connect:foo.sock -
+send "\r\n"
+expect "login:" {  send "root\r\n" }
+expect "/ #"
+set FINISHED 0
+set EXIT "1"
+send "ls -l /run/uncaught-logs/current\r\n"
+expect "/ #"
+while { $FINISHED < 10 } {
+  send "grep AP-ENABLED /run/uncaught-logs/current || echo not\r\n"
+  
+  expect {
+    "wlan0: AP-ENABLED" { set FINISHED 10; set EXIT 0; }
+    "not" { send_user "waiting ..." ; sleep 5 }
+  }
+  set FINISHED [ expr $FINISHED + 1 ]
+}
+
+exit $EXIT