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networking: drop wwan-autoconnect, let NetworkManager manage modem

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This commit is contained in:
Sergei Poljanski 2026-06-29 05:13:42 +03:00
commit 9e6122428c
Signed by: asxpi
GPG key ID: 4F8851660FA4121B
1 changed files with 7 additions and 57 deletions
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64
modules/networking.nix
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@ -54,63 +54,13 @@
before = [ "NetworkManager.service" ];
};
# Auto-connect WWAN modem on boot (workaround for NM/MBIM-PCIe issue)
systemd.services.wwan-autoconnect = {
description = "Auto-connect WWAN modem";
after = [ "ModemManager.service" ];
wants = [ "ModemManager.service" ];
wantedBy = [ "multi-user.target" ];
serviceConfig = {
Type = "oneshot";
RemainAfterExit = true;
ExecStartPre = "${pkgs.coreutils}/bin/sleep 5";
ExecStart = pkgs.writeShellScript "wwan-connect" ''
# Wait for modem to be available and get modem index
MODEM=""
for i in $(${pkgs.coreutils}/bin/seq 1 30); do
MODEM=$(${pkgs.modemmanager}/bin/mmcli -L 2>/dev/null | ${pkgs.gnugrep}/bin/grep -oE 'Modem/[0-9]+' | ${pkgs.coreutils}/bin/head -1 | ${pkgs.coreutils}/bin/cut -d/ -f2)
[ -n "$MODEM" ] && break
${pkgs.coreutils}/bin/sleep 1
done
if [ -z "$MODEM" ]; then
echo "No modem found"
exit 1
fi
# Enable modem
${pkgs.modemmanager}/bin/mmcli -m $MODEM -e || true
${pkgs.coreutils}/bin/sleep 2
# Connect with APN
${pkgs.modemmanager}/bin/mmcli -m $MODEM --simple-connect="apn=internet" || exit 0
${pkgs.coreutils}/bin/sleep 2
# Get bearer info and configure interface
BEARER=$(${pkgs.modemmanager}/bin/mmcli -m $MODEM 2>/dev/null | ${pkgs.gnugrep}/bin/grep "Bearer" | ${pkgs.gnugrep}/bin/grep -oE '/[0-9]+' | ${pkgs.coreutils}/bin/tail -1 | ${pkgs.coreutils}/bin/tr -d '/')
if [ -n "$BEARER" ]; then
IP=$(${pkgs.modemmanager}/bin/mmcli -b $BEARER 2>/dev/null | ${pkgs.gnugrep}/bin/grep "address:" | ${pkgs.gawk}/bin/awk '{print $NF}')
GW=$(${pkgs.modemmanager}/bin/mmcli -b $BEARER 2>/dev/null | ${pkgs.gnugrep}/bin/grep "gateway:" | ${pkgs.gawk}/bin/awk '{print $NF}')
PREFIX=$(${pkgs.modemmanager}/bin/mmcli -b $BEARER 2>/dev/null | ${pkgs.gnugrep}/bin/grep "prefix:" | ${pkgs.gawk}/bin/awk '{print $NF}')
[ -z "$PREFIX" ] && PREFIX=30
if [ -n "$IP" ] && [ -n "$GW" ]; then
${pkgs.iproute2}/bin/ip link set wwan0 up
${pkgs.iproute2}/bin/ip addr add $IP/$PREFIX dev wwan0 2>/dev/null || true
# Add source-based routing for wwan0
${pkgs.iproute2}/bin/ip route add default via $GW dev wwan0 table 100 2>/dev/null || true
${pkgs.iproute2}/bin/ip rule add from $IP table 100 priority 100 2>/dev/null || true
# Also add regular default route with low priority
${pkgs.iproute2}/bin/ip route add default via $GW dev wwan0 metric 700 2>/dev/null || true
fi
fi
'';
ExecStop = pkgs.writeShellScript "wwan-disconnect" ''
MODEM=$(${pkgs.modemmanager}/bin/mmcli -L 2>/dev/null | ${pkgs.gnugrep}/bin/grep -oE 'Modem/[0-9]+' | ${pkgs.coreutils}/bin/head -1 | ${pkgs.coreutils}/bin/cut -d/ -f2)
[ -n "$MODEM" ] && ${pkgs.modemmanager}/bin/mmcli -m $MODEM --simple-disconnect 2>/dev/null || true
${pkgs.iproute2}/bin/ip link set wwan0 down 2>/dev/null || true
'';
};
};
# WWAN modem connection is managed by NetworkManager / the GNOME applet.
# A previous wwan-autoconnect oneshot service called `mmcli --simple-connect`
# with a hardcoded APN and set up routing by hand. It fought NM for the modem
# (endless "connecting") and its hardcoded APN broke when the SIM changed.
# Removed: connect via the GNOME network applet using the "narayana" GSM
# profile (apn=data.narayana). Re-add a service only if headless autoconnect
# is needed, and if so set the NM profile's autoconnect=no to avoid contention.
# IVPN service — installed but not auto-started at boot.
# Start manually: `sudo systemctl start ivpn-service`