126 lines
3.8 KiB
Nix
126 lines
3.8 KiB
Nix
# Based on https://github.com/jgillich/nixos/blob/master/services/ppp.nix
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# Tipps and tricks under https://www.hackster.io/munoz0raul/how-to-use-gsm-3g-4g-in-embedded-linux-systems-9047cf#toc-configuring-the-ppp-files-5
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# TODO: http://www.embeddedpi.com/documentation/3g-4g-modems/raspberry-pi-sierra-wireless-mc7455-modem-raw-ip-qmi-interface-setup
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{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.wwan;
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mbim-ip = pkgs.writeScriptBin "mbim-ip" readFile ./wwan/mbim-ip.bash;
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mbim-ip-configured = pkgs.writeScriptBin "mbim-ip-configured" ''
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#!${pkgs.stdenv.shell}
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MBIM_BINARY=${pkgs.libmbim}/bin/mbimcli
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MBIM_INTERFACE=${cfg.mbimInterface}
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exec ${mbim-ip} $@
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'';
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in
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{
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options = {
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services.wwan = {
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enable = mkEnableOption "wwan client service";
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config = mkOption {
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type = types.attrsOf (types.submodule (
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{
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options = {
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apn = mkOption {
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type = types.str;
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description = ''
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APN domain of provider.
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'';
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};
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apnUser = mkOption {
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type = types.str;
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default = "";
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description = ''
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APN username (optional).
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'';
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};
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apnPass = mkOption {
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type = types.str;
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default = "";
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description = ''
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APN password (optional).
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'';
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};
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apnAuth = mkOption {
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type = types.enum;
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values = [ "PAP" "CHAP" "MSCHAPV2" "" ];
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default = "";
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description = ''
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APN authentication type, one of ${concatMapStringsSep ", " show values} (optional).
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'';
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};
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mbimProxy = mkOption {
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type = types.bool;
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default = true;
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description = ''
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Whether to use the mbim proxy or not.
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'';
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};
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mbimInterface = mkOption {
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type = types.path;
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default = /dev/cdc-wdm0
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description = "MBIM Interface which the connection will use.";
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};
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networkInterface = mkOption {
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type = types.str;
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description = "Name of the WWAN network interface";
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};
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};
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}
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));
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default = {};
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example = literalExample ''
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{
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wwan = {
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apn = "gprs.swisscom.ch";
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networkInterface = "wwp0s19u1u3i12";
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};
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}
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'';
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description = ''
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Configuration for WWAN connectivity using a MBIM capable card.
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'';
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};
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};
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};
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config = mkIf cfg.enable {
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systemd.services."wwan" = {
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description = "WWAN connectivity";
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wantedBy = [ "network.target" ];
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wants = [ "sys-subsystem-net-devices-${cfg.networkInterface}.device"];
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serviceConfig = {
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ExecStart = "@${pkgs.libmbim}/bin/mbim-network ${toString cfg.mbimInterface} start";
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ExecStop = "@${pkgs.libmbim}/bin/mbim-network ${toString cfg.mbimInterface} stop";
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# MBIM networking is a special fellow - it gets the IP address for us,
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# but we need to manually set it to the interface
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ExecStartPost = "@${mbim-ip-configured} start ${cfg.networkInterface}";
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ExecStopPre = "@${mbim-ip-configured} stop ${cfg.networkInterface}";
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RemainAfterExit = true;
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};
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};
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environment.etc."/etc/mbim-network.conf".text = ''
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APN=${cfg.apnUser}
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APN_USER=${cfg.apnUser}
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APN_PASS=${cfg.apnPass}
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APN_AUTH=${cfg.apnAuth}
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PROXY=${optionalString cfg.proxy "yes"}
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'';
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};
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}
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