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modem fix

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This commit is contained in:
Sergei Poljanski 2025-12-23 11:49:25 +02:00
commit f7549c8fe9
Signed by: asxpi
GPG key ID: 4F8851660FA4121B
1 changed files with 76 additions and 5 deletions
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81
modules/networking.nix
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@ -12,7 +12,7 @@
# Enable networking
networking.networkmanager.enable = true;
# Fibocom EM120R-GL WWAN Modem Support
# Quectel EM120R-GL WWAN Modem Support
# FCC unlock for Quectel EM120R-GL
networking.modemmanager.fccUnlockScripts = [
{
@ -21,14 +21,85 @@
}
];
# Kernel modules for WWAN/MBIM modems
boot.kernelModules = [ "cdc_mbim" "qmi_wwan" "cdc_wdm" "mhi" ];
# udev rules for WWAN devices
services.udev.extraRules = ''
KERNEL=="wwan*mbim*", MODE="0660", GROUP="dialout"
KERNEL=="wwan*qcdm*", MODE="0660", GROUP="dialout"
KERNEL=="wwan*at*", MODE="0660", GROUP="dialout"
KERNEL=="cdc-wdm*", MODE="0660", GROUP="dialout"
KERNEL=="wwan*mbim*", MODE="0660", GROUP="networkmanager"
KERNEL=="wwan*qcdm*", MODE="0660", GROUP="networkmanager"
KERNEL=="wwan*at*", MODE="0660", GROUP="networkmanager"
KERNEL=="cdc-wdm*", MODE="0660", GROUP="networkmanager"
KERNEL=="wwan*", MODE="0660", GROUP="networkmanager"
'';
# Ensure ModemManager starts before NetworkManager
systemd.services.ModemManager = {
wantedBy = [ "multi-user.target" ];
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
'';
};
};
# IVPN service
services.ivpn.enable = false;
# Open ports in the firewall.
# networking.firewall.allowedTCPPorts = [ ... ];
# networking.firewall.allowedUDPPorts = [ ... ];