Wpa supplicant: Difference between revisions

Line 47:

Since there is no option to randomize your MAC address for wpa supplicant, you can instead create your own service using GNU's macchanger:

systemd.services.macchanger = {

let

enable = true;

change-mac = pkgs.writeShellScript "change-mac" ''

description = "macchanger on ~~wlxxxx~~";

card=$1

wants = [ "network-pre.target" ];

tmp=$(mktemp)

before = [ "network-pre.target" ];

${pkgs.macchanger}/bin/macchanger "$card" -s | grep -oP "[a-zA-Z0-9]{2}:[a-zA-Z0-9]{2}:[^ ]*" > "$tmp"

bindsTo = [ "sys-subsystem-net-devices-~~wlxxxx~~.device" ];

mac1=$(cat "$tmp" | head -n 1)

after = [ "sys-subsystem-net-devices-~~wlxxxx~~.device" ];

mac2=$(cat "$tmp" | tail -n 1)

wantedBy = [ "multi-user.target" ];

if [ "$mac1" = "$mac2" ]; then

serviceConfig = {

if [ "$(cat /sys/class/net/"$card"/operstate)" = "up" ]; then

Type = "oneshot";

${pkgs.iproute2}/bin/ip link set "$card" down &&

ExecStart = "${~~pkgs.macchanger~~}~~/bin/macchanger -r wlxxxx~~";

macchanger -r "$card"

${pkgs.iproute2}/bin/ip link set "$card" up

else

${pkgs.macchanger}/bin/macchanger -r "$card"

fi

'';

in

systemd.services.macchanger = {

enable = true;

description = "macchanger on wlan0";

wants = [ "network-pre.target" ];

before = [ "network-pre.target" ];

bindsTo = [ "sys-subsystem-net-devices-wlan0.device" ];

after = [ "sys-subsystem-net-devices-wlan0.device" ];

wantedBy = [ "multi-user.target" ];

serviceConfig = {

Type = "oneshot";

ExecStart = "${change-mac} wlan0";

};

</syntaxHighlight>

Where you need to change the <code>~~wlxxxx~~</code> with your own wifi network interface. You can list your interfaces by running <code>ip link</code>, your wifi network interface should have "wl" prepended. Note that the above snippet fully randomizes your MAC address, for more information you can read macchanger's manpage. This obviously requires you to have the <code>macchanger</code> package installed.

Where you need to change the <code>wlan0</code> with your own wifi network interface. You can list your interfaces by running <code>ip link</code>, your wifi network interface should have "wl" prepended. Note that the above snippet fully randomizes your MAC address, for more information you can read macchanger's manpage. This obviously requires you to have the <code>macchanger</code> package installed.

== External links ==

[https://www.stura.htw-dresden.de/stura/ref/hopo/dk/nachrichten/eduroam-meets-nixos (german) article ''eduroam meets NixOS'' (with configuration)] (instance ''University of Applied Sciences Dresden'': The [https://cat.eduroam.org/?idp=5106&profile=5098 eduroam installer for GNU/Linux] works [https://www.htw-dresden.de/en/university/organisation/it-service-centre/services-for-workplace-and-communication/wi-fi-/-wlan/eduroam/linux for example for Ubuntu] but not [[NixOS]])

@@ Line 47: / Line 47: @@
 Since there is no option to randomize your MAC address for wpa supplicant, you can instead create your own service using GNU's macchanger:
 <syntaxHighlight lang=nix>
-systemd.services.macchanger = {
+let
-	enable = true;
+	change-mac = pkgs.writeShellScript "change-mac" ''
-	description = "macchanger on wlxxxx";
+		card=$1
-	wants = [ "network-pre.target" ];
+		tmp=$(mktemp)
-	before = [ "network-pre.target" ];
+		${pkgs.macchanger}/bin/macchanger "$card" -s | grep -oP "[a-zA-Z0-9]{2}:[a-zA-Z0-9]{2}:[^ ]*" > "$tmp"
-	bindsTo = [ "sys-subsystem-net-devices-wlxxxx.device" ];
+		mac1=$(cat "$tmp" | head -n 1)
-	after = [ "sys-subsystem-net-devices-wlxxxx.device" ];
+		mac2=$(cat "$tmp" | tail -n 1)
-	wantedBy = [ "multi-user.target" ];
+		if [ "$mac1" = "$mac2" ]; then
-	serviceConfig = {
+			if [ "$(cat /sys/class/net/"$card"/operstate)" = "up" ]; then
-		Type = "oneshot";
+				${pkgs.iproute2}/bin/ip link set "$card" down &&
-		ExecStart = "${pkgs.macchanger}/bin/macchanger -r wlxxxx";
+				macchanger -r "$card"
+				${pkgs.iproute2}/bin/ip link set "$card" up
+			else
+				${pkgs.macchanger}/bin/macchanger -r "$card"
+			fi
+		fi
+	'';
+in
+	systemd.services.macchanger = {
+		enable = true;
+		description = "macchanger on wlan0";
+		wants = [ "network-pre.target" ];
+		before = [ "network-pre.target" ];
+		bindsTo = [ "sys-subsystem-net-devices-wlan0.device" ];
+		after = [ "sys-subsystem-net-devices-wlan0.device" ];
+		wantedBy = [ "multi-user.target" ];
+		serviceConfig = {
+			Type = "oneshot";
+			ExecStart = "${change-mac} wlan0";
+		};
 	};
-};
 </syntaxHighlight>
-Where you need to change the <code>wlxxxx</code> with your own wifi network interface. You can list your interfaces by running <code>ip link</code>, your wifi network interface should have "wl" prepended. Note that the above snippet fully randomizes your MAC address, for more information you can read macchanger's manpage. This obviously requires you to have the <code>macchanger</code> package installed.
+Where you need to change the <code>wlan0</code> with your own wifi network interface. You can list your interfaces by running <code>ip link</code>, your wifi network interface should have "wl" prepended. Note that the above snippet fully randomizes your MAC address, for more information you can read macchanger's manpage. This obviously requires you to have the <code>macchanger</code> package installed.
 == External links ==
 [https://www.stura.htw-dresden.de/stura/ref/hopo/dk/nachrichten/eduroam-meets-nixos (german) article ''eduroam meets NixOS'' (with configuration)] (instance ''University of Applied Sciences Dresden'': The [https://cat.eduroam.org/?idp=5106&profile=5098 eduroam installer for GNU/Linux] works [https://www.htw-dresden.de/en/university/organisation/it-service-centre/services-for-workplace-and-communication/wi-fi-/-wlan/eduroam/linux for example for Ubuntu] but not [[NixOS]])