add basic ap stuff: hostapd, dhcpd

1 files changed, 138 insertions, 0 deletions

diff --git a/config/networking/hostapd.nix b/config/networking/hostapd.nix
new file mode 100644
index 0000000..f5f399b
--- /dev/null
+++ b/config/networking/hostapd.nix
@@ -0,0 +1,138 @@
+{ config, lib, utils, pkgs, secrets, ... }:
+
+let
+  cfg = config.services.hostapd;
+  makeHostapdConf = { name, interface ? cfg.interface, driver ? cfg.driver, ssid
+    , hwMode ? cfg.hwMode, channel ? cfg.channel, countryCode ? cfg.countryCode
+    , passphrase ? secrets.wifi."${name}".passphrase, logLevel ? cfg.logLevel
+    , extraConfig ? "" }:
+    builtins.toFile "hostapd.${name}.conf" (''
+      interface=${interface}
+      driver=${driver}
+
+      # IEEE 802.11
+      ssid=${ssid}
+      hw_mode=${hwMode}
+      channel=${toString channel}
+      max_num_sta=128
+      auth_algs=1
+      disassoc_low_ack=1
+
+      # DFS 
+      ieee80211h=1
+      ieee80211d=1
+      country_code=${countryCode}
+
+
+      # WPA/IEEE 802.11i
+      wpa=2
+      wpa_key_mgmt=WPA-PSK
+      wpa_passphrase=${passphrase}
+      wpa_pairwise=CCMP
+
+      # hostapd event logger configuration
+      logger_syslog=-1
+      logger_syslog_level=${toString logLevel}
+      logger_stdout=-1
+      logger_stdout_level=${toString logLevel}
+
+      # WMM
+      wmm_enabled=1
+      uapsd_advertisement_enabled=1
+      wmm_ac_bk_cwmin=4
+      wmm_ac_bk_cwmax=10
+      wmm_ac_bk_aifs=7
+      wmm_ac_bk_txop_limit=0
+      wmm_ac_bk_acm=0
+      wmm_ac_be_aifs=3
+      wmm_ac_be_cwmin=4
+      wmm_ac_be_cwmax=10
+      wmm_ac_be_txop_limit=0
+      wmm_ac_be_acm=0
+      wmm_ac_vi_aifs=2
+      wmm_ac_vi_cwmin=3
+      wmm_ac_vi_cwmax=4
+      wmm_ac_vi_txop_limit=94
+      wmm_ac_vi_acm=0
+      wmm_ac_vo_aifs=2
+      wmm_ac_vo_cwmin=2
+      wmm_ac_vo_cwmax=3
+      wmm_ac_vo_txop_limit=47
+      wmm_ac_vo_acm=0
+
+      # TX queue parameters
+      tx_queue_data3_aifs=7
+      tx_queue_data3_cwmin=15
+      tx_queue_data3_cwmax=1023
+      tx_queue_data3_burst=0
+      tx_queue_data2_aifs=3
+      tx_queue_data2_cwmin=15
+      tx_queue_data2_cwmax=63
+      tx_queue_data2_burst=0
+      tx_queue_data1_aifs=1
+      tx_queue_data1_cwmin=7
+      tx_queue_data1_cwmax=15
+      tx_queue_data1_burst=3.0
+      tx_queue_data0_aifs=1
+      tx_queue_data0_cwmin=3
+      tx_queue_data0_cwmax=7
+      tx_queue_data0_burst=1.5
+    '' + extraConfig);
+  hostapd2ghzConf = makeHostapdConf {
+    name = "2ghz";
+    interface = config.personal.networking.interfaces.wlp2ghz;
+    ssid = "Quentinternet of Things";
+    hwMode = "g";
+    channel = 0;
+    extraConfig = ''
+      # IEEE 802.11n
+      ieee80211n=1
+      require_ht=1
+      ht_capab=[HT40+][SHORT-GI-40][TX-STBC][RX-STBC1][DSSS_CCK-40]
+    '';
+  };
+  hostapd5ghzConf = makeHostapdConf {
+    name = "5ghz";
+    interface = config.personal.networking.interfaces.wlp5ghz;
+    ssid = "Quentintranet";
+    hwMode = "a";
+    channel = 36;
+    extraConfig = ''
+      # IEEE 802.11n
+      ieee80211n=1
+      require_ht=1
+      ht_capab=[HT40+][LDPC][SHORT-GI-20][SHORT-GI-40][TX-STBC][RX-STBC1][DSSS_CCK-40]
+
+      # IEEE 802.11ac
+      require_vht=1
+      ieee80211ac=1
+      vht_oper_chwidth=1
+      vht_oper_centr_freq_seg0_idx=42
+      vht_capab=[MAX-MPDU-11454][RXLDPC][SHORT-GI-80][TX-STBC-2BY1][RX-STBC-1][MAX-A-MPDU-LEN-EXP7][RX-ANTENNA-PATTERN][TX-ANTENNA-PATTERN]
+    '';
+  };
+in {
+  services.hostapd = {
+    enable = true;
+    driver = "nl80211";
+    countryCode = "FR";
+  };
+
+  systemd.services.hostapd = let
+    interfaces = with config.personal.networking.interfaces; [
+      wlp2ghz
+      wlp5ghz
+    ];
+    netDevices = builtins.map (interface:
+      "sys-subsystem-net-devices-${utils.escapeSystemdPath interface}.device")
+      interfaces;
+    networkLinkServices =
+      builtins.map (interface: "network-link-${interface}.service") interfaces;
+  in {
+    serviceConfig.ExecStart = lib.mkForce
+      "${pkgs.hostapd}/bin/hostapd ${hostapd2ghzConf} ${hostapd5ghzConf}";
+    after = lib.mkForce netDevices;
+    bindsTo = lib.mkForce netDevices;
+    requiredBy = lib.mkForce networkLinkServices;
+  };
+}