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authortv <tv@krebsco.de>2023-01-18 17:14:27 +0100
committertv <tv@krebsco.de>2023-01-18 17:23:38 +0100
commit1da6186814c94512c1cbc41f2dfd3b4ac7b2e44f (patch)
treeda65a34798291d3f60ce70e94a84e099fc60e2f6 /tv/3modules/wwan.nix
parent5eb821ab1bea5efd2f845115b3dbc31f4f475ca9 (diff)
tv.wwan: init
Diffstat (limited to 'tv/3modules/wwan.nix')
-rw-r--r--tv/3modules/wwan.nix163
1 files changed, 163 insertions, 0 deletions
diff --git a/tv/3modules/wwan.nix b/tv/3modules/wwan.nix
new file mode 100644
index 000000000..703a903c9
--- /dev/null
+++ b/tv/3modules/wwan.nix
@@ -0,0 +1,163 @@
+with import ./lib;
+{ config, pkgs, ... }: {
+ options = {
+ tv.wwan.enable = mkEnableOption "tv.wwan";
+ tv.wwan.apn = mkOption {
+ type = with types; filename;
+ };
+ tv.wwan.device = mkOption {
+ type = with types; pathname;
+ default = "/dev/cdc-wdm0";
+ };
+ tv.wwan.interface = mkOption {
+ type = with types; nullOr filename;
+ default = null;
+ };
+ tv.wwan.operators = mkOption {
+ type = with types; listOf username;
+ default = [];
+ };
+ tv.wwan.secrets = mkOption {
+ type = with types; pathname;
+ default = toString <secrets/wwan.json>;
+ # format: {"pin1":number}
+ };
+ };
+ config = let
+ cfg = config.tv.wwan;
+ in mkIf cfg.enable {
+ systemd.services.wwan = {
+ environment = {
+ DEVICE = cfg.device;
+ SECRETS = "%d/secrets";
+ };
+ path = [
+ pkgs.busybox
+ pkgs.coreutils
+ pkgs.iproute2
+ pkgs.jq
+ (pkgs.symlinkJoin {
+ name = "uqmi-wrapper";
+ paths = [
+ (pkgs.writeDashBin "uqmi" ''
+ set -efu
+ exec ${pkgs.uqmi}/bin/uqmi --device="$DEVICE" "$@"
+ '')
+ pkgs.uqmi
+ ];
+ })
+ (pkgs.writeDashBin "get-interface" (
+ if cfg.interface != null then /* sh */ ''
+ echo ${cfg.interface}
+ '' else /* sh */ ''
+ exec ${pkgs.libqmi}/bin/qmicli -d "$DEVICE" -p --get-wwan-iface
+ ''
+ ))
+ ];
+ serviceConfig = {
+ LoadCredential = [
+ "secrets:${cfg.secrets}"
+ ];
+ Type = "oneshot";
+ RemainAfterExit = true;
+ SyslogIdentifier = "wwan";
+ ExecStart = pkgs.writeDash "tv.wwan.start.sh" ''
+ set -efu
+
+ interface=$(get-interface)
+
+ pin1_status=$(
+ uqmi --uim-get-sim-state |
+ jq -r '"\(.pin1_status)/\(.pin1_verify_tries)"'
+ )
+ case $pin1_status in
+ verified/*)
+ :
+ ;;
+ not_verified/3)
+ pin1=$(jq .pin1 "$SECRETS")
+ echo "verifying PIN1" >&2
+ if ! uqmi --uim-verify-pin1 "$pin1"; then
+ echo "error: failed to verify PIN1" >&2
+ exit 1
+ fi
+ ;;
+ not_verified/*)
+ echo "error: not trying to verify PIN1: not enough tries left" >&2
+ echo \
+ "please check your configuration in ${cfg.secrets}" \
+ " and verify if manually using:" \
+ " ${pkgs.uqmi}/bin/uqmi -d $device --uim-veriy-pin1 XXXX" \
+ >&2
+ exit 1
+ esac
+
+ raw_ip_path=/sys/class/net/$interface/qmi/raw_ip
+ raw_ip=$(cat "$raw_ip_path")
+ if [ "$raw_ip" != Y ]; then
+ echo "enabling raw-ip" >&2
+ if ! echo Y > "$raw_ip_path"; then
+ echo "error: failed to enable raw-ip" >&2
+ exit 1
+ fi
+ fi
+
+ operating_mode=$(uqmi --get-device-operating-mode | tr -d \")
+ case $operating_mode in
+ online)
+ :
+ ;;
+ persistent_low_power|low_power)
+ echo "settings device operating mode to online" >&2
+ uqmi --set-device-operating-mode online
+ operating_mode=$(uqmi --get-device-operating-mode | tr -d \")
+ if test "$operating_mode" != online; then
+ echo "error: failed to set device operating mode to online" >&2
+ exit 1
+ fi
+ ;;
+ *)
+ echo "error: don't know how to change device operating mode to online: $operating_mode" >&2
+ exit 1
+ esac
+
+ ip link set dev "$interface" up
+
+ data_status=$(uqmi --get-data-status | tr -d \")
+ case $data_status in
+ connected)
+ :
+ ;;
+ disconnected)
+ echo "starting network (APN=${cfg.apn})" >&2
+ sleep 1
+ uqmi \
+ --start-network \
+ --autoconnect \
+ --apn ${cfg.apn} \
+ --ip-family ipv4
+ sleep 1
+ ;;
+ *)
+ echo "error: unsupported data status: $data_status" >&2
+ exit 1
+ esac
+
+ udhcpc -q -f -n -i "$interface"
+ '';
+ Restart = "on-failure";
+ ExecStop = pkgs.writeDash "tv.wwan.stop.sh" ''
+ set -efu
+
+ interface=$(get-interface)
+
+ ip link set dev "$interface" down
+ uqmi --stop-network 0xFFFFFFFF --autoconnect
+ uqmi --sync
+ uqmi --set-device-operating-mode persistent_low_power
+ '';
+ };
+ };
+ tv.systemd.services.wwan.operators = cfg.operators;
+ };
+}