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nixpkgs/nixos/modules/services/networking/networkmanager.nix

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{ config, lib, pkgs, ... }:
with pkgs;
with lib;
let
cfg = config.networking.networkmanager;
dynamicHostsEnabled =
cfg.dynamicHosts.enable && cfg.dynamicHosts.hostsDirs != {};
# /var/lib/misc is for dnsmasq.leases.
stateDirs = "/var/lib/NetworkManager /var/lib/dhclient /var/lib/misc";
configFile = writeText "NetworkManager.conf" ''
[main]
plugins=keyfile
dhcp=${cfg.dhcp}
dns=${cfg.dns}
[keyfile]
${optionalString (cfg.unmanaged != [])
''unmanaged-devices=${lib.concatStringsSep ";" cfg.unmanaged}''}
[logging]
level=${cfg.logLevel}
[connection]
ipv6.ip6-privacy=2
ethernet.cloned-mac-address=${cfg.ethernet.macAddress}
wifi.cloned-mac-address=${cfg.wifi.macAddress}
${optionalString (cfg.wifi.powersave != null)
''wifi.powersave=${if cfg.wifi.powersave then "3" else "2"}''}
[device]
wifi.scan-rand-mac-address=${if cfg.wifi.scanRandMacAddress then "yes" else "no"}
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${cfg.extraConfig}
'';
/*
[network-manager]
Identity=unix-group:networkmanager
Action=org.freedesktop.NetworkManager.*
ResultAny=yes
ResultInactive=no
ResultActive=yes
[modem-manager]
Identity=unix-group:networkmanager
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Action=org.freedesktop.ModemManager*
ResultAny=yes
ResultInactive=no
ResultActive=yes
*/
polkitConf = ''
polkit.addRule(function(action, subject) {
if (
subject.isInGroup("networkmanager")
&& (action.id.indexOf("org.freedesktop.NetworkManager.") == 0
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|| action.id.indexOf("org.freedesktop.ModemManager") == 0
))
{ return polkit.Result.YES; }
});
'';
ns = xs: writeText "nameservers" (
concatStrings (map (s: "nameserver ${s}\n") xs)
);
overrideNameserversScript = writeScript "02overridedns" ''
#!/bin/sh
tmp=`${coreutils}/bin/mktemp`
${gnused}/bin/sed '/nameserver /d' /etc/resolv.conf > $tmp
${gnugrep}/bin/grep 'nameserver ' /etc/resolv.conf | \
${gnugrep}/bin/grep -vf ${ns (cfg.appendNameservers ++ cfg.insertNameservers)} > $tmp.ns
${optionalString (cfg.appendNameservers != []) "${coreutils}/bin/cat $tmp $tmp.ns ${ns cfg.appendNameservers} > /etc/resolv.conf"}
${optionalString (cfg.insertNameservers != []) "${coreutils}/bin/cat $tmp ${ns cfg.insertNameservers} $tmp.ns > /etc/resolv.conf"}
${coreutils}/bin/rm -f $tmp $tmp.ns
'';
dispatcherTypesSubdirMap = {
"basic" = "";
"pre-up" = "pre-up.d/";
"pre-down" = "pre-down.d/";
};
macAddressOpt = mkOption {
type = types.either types.str (types.enum ["permanent" "preserve" "random" "stable"]);
default = "preserve";
example = "00:11:22:33:44:55";
description = ''
"XX:XX:XX:XX:XX:XX": MAC address of the interface.
<literal>permanent</literal>: use the permanent MAC address of the device.
<literal>preserve</literal>: dont change the MAC address of the device upon activation.
<literal>random</literal>: generate a randomized value upon each connect.
<literal>stable</literal>: generate a stable, hashed MAC address.
'';
};
in {
###### interface
options = {
networking.networkmanager = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
Whether to use NetworkManager to obtain an IP address and other
configuration for all network interfaces that are not manually
configured. If enabled, a group <literal>networkmanager</literal>
will be created. Add all users that should have permission
to change network settings to this group.
'';
};
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extraConfig = mkOption {
type = types.lines;
default = "";
description = ''
Configuration appended to the generated NetworkManager.conf.
'';
};
unmanaged = mkOption {
type = types.listOf types.string;
default = [];
description = ''
List of interfaces that will not be managed by NetworkManager.
Interface name can be specified here, but if you need more fidelity
see "Device List Format" in NetworkManager.conf man page.
'';
};
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# Ugly hack for using the correct gnome3 packageSet
basePackages = mkOption {
type = types.attrsOf types.package;
default = { inherit networkmanager modemmanager wpa_supplicant
networkmanager-openvpn networkmanager-vpnc
networkmanager-openconnect networkmanager-fortisslvpn
networkmanager-l2tp networkmanager-iodine; };
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internal = true;
};
packages = mkOption {
type = types.listOf types.path;
default = [ ];
description = ''
Extra packages that provide NetworkManager plugins.
'';
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apply = list: (attrValues cfg.basePackages) ++ list;
};
dhcp = mkOption {
type = types.enum [ "dhclient" "dhcpcd" "internal" ];
default = "dhclient";
description = ''
Which program (or internal library) should be used for DHCP.
'';
};
logLevel = mkOption {
type = types.enum [ "OFF" "ERR" "WARN" "INFO" "DEBUG" "TRACE" ];
default = "WARN";
description = ''
Set the default logging verbosity level.
'';
};
appendNameservers = mkOption {
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type = types.listOf types.str;
default = [];
description = ''
A list of name servers that should be appended
to the ones configured in NetworkManager or received by DHCP.
'';
};
insertNameservers = mkOption {
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type = types.listOf types.str;
default = [];
description = ''
A list of name servers that should be inserted before
the ones configured in NetworkManager or received by DHCP.
'';
};
ethernet.macAddress = macAddressOpt;
wifi = {
macAddress = macAddressOpt;
powersave = mkOption {
type = types.nullOr types.bool;
default = null;
description = ''
Whether to enable Wi-Fi power saving.
'';
};
scanRandMacAddress = mkOption {
type = types.bool;
default = true;
description = ''
Whether to enable MAC address randomization of a Wi-Fi device
during scanning.
'';
};
};
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dns = mkOption {
type = types.enum [ "default" "dnsmasq" "unbound" "systemd-resolved" "none" ];
default = "default";
description = ''
Set the DNS (<literal>resolv.conf</literal>) processing mode.
</para>
<para>
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Options:
<variablelist>
<varlistentry>
<term><literal>"default"</literal></term>
<listitem><para>
NetworkManager will update <literal>/etc/resolv.conf</literal> to
reflect the nameservers provided by currently active connections.
</para></listitem>
</varlistentry>
<varlistentry>
<term><literal>"dnsmasq"</literal></term>
<listitem>
<para>
Enable NetworkManager's dnsmasq integration. NetworkManager will
run dnsmasq as a local caching nameserver, using a "split DNS"
configuration if you are connected to a VPN, and then update
<literal>resolv.conf</literal> to point to the local nameserver.
</para>
<para>
It is possible to pass custom options to the dnsmasq instance by
adding them to files in the
<literal>/etc/NetworkManager/dnsmasq.d/</literal> directory.
</para>
<para>
When multiple upstream servers are available, dnsmasq will
initially contact them in parallel and then use the fastest to
respond, probing again other servers after some time. This
behavior can be modified passing the
<literal>all-servers</literal> or <literal>strict-order</literal>
options to dnsmasq (see the manual page for more details).
</para>
<para>
Note that this option causes NetworkManager to launch and manage
its own instance of the dnsmasq daemon, which is
<emphasis>not</emphasis> the same as setting
<literal>services.dnsmasq.enable = true;</literal>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>"unbound"</literal></term>
<listitem><para>
NetworkManager will talk to unbound and dnssec-triggerd,
providing a "split DNS" configuration with DNSSEC support.
<literal>/etc/resolv.conf</literal> will be managed by
dnssec-trigger daemon.
</para></listitem>
</varlistentry>
<varlistentry>
<term><literal>"systemd-resolved"</literal></term>
<listitem><para>
NetworkManager will push the DNS configuration to systemd-resolved.
</para></listitem>
</varlistentry>
<varlistentry>
<term><literal>"none"</literal></term>
<listitem><para>
NetworkManager will not modify resolv.conf.
</para></listitem>
</varlistentry>
</variablelist>
'';
};
dispatcherScripts = mkOption {
type = types.listOf (types.submodule {
options = {
source = mkOption {
type = types.path;
description = ''
Path to the hook script.
'';
};
type = mkOption {
type = types.enum (attrNames dispatcherTypesSubdirMap);
default = "basic";
description = ''
Dispatcher hook type. Look up the hooks described at
<link xlink:href="https://developer.gnome.org/NetworkManager/stable/NetworkManager.html">https://developer.gnome.org/NetworkManager/stable/NetworkManager.html</link>
and choose the type depending on the output folder.
You should then filter the event type (e.g., "up"/"down") from within your script.
'';
};
};
});
default = [];
example = literalExample ''
[ {
source = pkgs.writeText "upHook" '''
if [ "$2" != "up" ]; then
logger "exit: event $2 != up"
fi
# coreutils and iproute are in PATH too
logger "Device $DEVICE_IFACE coming up"
''';
type = "basic";
} ]'';
description = ''
A list of scripts which will be executed in response to network events.
'';
};
enableStrongSwan = mkOption {
type = types.bool;
default = false;
description = ''
Enable the StrongSwan plugin.
</para><para>
If you enable this option the
<literal>networkmanager_strongswan</literal> plugin will be added to
the <option>networking.networkmanager.packages</option> option
so you don't need to to that yourself.
'';
};
dynamicHosts = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
Enabling this option requires the
<option>networking.networkmanager.dns</option> option to be
set to <literal>dnsmasq</literal>. If enabled, the directories
defined by the
<option>networking.networkmanager.dynamicHosts.hostsDirs</option>
option will be set up when the service starts. The dnsmasq instance
managed by NetworkManager will then watch those directories for
hosts files (see the <literal>--hostsdir</literal> option of
dnsmasq). This way a non-privileged user can add or override DNS
entries on the local system (depending on what hosts directories
that are configured)..
'';
};
hostsDirs = mkOption {
type = with types; attrsOf (submodule {
options = {
user = mkOption {
type = types.str;
default = "root";
description = ''
The user that will own the hosts directory.
'';
};
group = mkOption {
type = types.str;
default = "root";
description = ''
The group that will own the hosts directory.
'';
};
};
});
default = {};
description = ''
Defines a set of directories (relative to
<literal>/run/NetworkManager/hostdirs</literal>) that dnsmasq will
watch for hosts files.
'';
};
};
};
};
###### implementation
config = mkIf cfg.enable {
assertions = [
{ assertion = config.networking.wireless.enable == false;
message = "You can not use networking.networkmanager with networking.wireless";
}
{ assertion = !dynamicHostsEnabled || (dynamicHostsEnabled && cfg.dns == "dnsmasq");
message = ''
To use networking.networkmanager.dynamicHosts you also need to set
networking.networkmanager.dns = "dnsmasq"
'';
}
];
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environment.etc = with cfg.basePackages; [
{ source = configFile;
target = "NetworkManager/NetworkManager.conf";
}
{ source = "${networkmanager-openvpn}/lib/NetworkManager/VPN/nm-openvpn-service.name";
target = "NetworkManager/VPN/nm-openvpn-service.name";
}
{ source = "${networkmanager-vpnc}/lib/NetworkManager/VPN/nm-vpnc-service.name";
target = "NetworkManager/VPN/nm-vpnc-service.name";
}
{ source = "${networkmanager-openconnect}/lib/NetworkManager/VPN/nm-openconnect-service.name";
target = "NetworkManager/VPN/nm-openconnect-service.name";
}
{ source = "${networkmanager-fortisslvpn}/lib/NetworkManager/VPN/nm-fortisslvpn-service.name";
target = "NetworkManager/VPN/nm-fortisslvpn-service.name";
}
{ source = "${networkmanager-l2tp}/lib/NetworkManager/VPN/nm-l2tp-service.name";
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target = "NetworkManager/VPN/nm-l2tp-service.name";
}
{ source = "${networkmanager_strongswan}/lib/NetworkManager/VPN/nm-strongswan-service.name";
target = "NetworkManager/VPN/nm-strongswan-service.name";
}
{ source = "${networkmanager-iodine}/lib/NetworkManager/VPN/nm-iodine-service.name";
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target = "NetworkManager/VPN/nm-iodine-service.name";
}
] ++ optional (cfg.appendNameservers == [] || cfg.insertNameservers == [])
{ source = overrideNameserversScript;
target = "NetworkManager/dispatcher.d/02overridedns";
}
++ lib.imap1 (i: s: {
inherit (s) source;
target = "NetworkManager/dispatcher.d/${dispatcherTypesSubdirMap.${s.type}}03userscript${lib.fixedWidthNumber 4 i}";
mode = "0544";
}) cfg.dispatcherScripts
++ optional (dynamicHostsEnabled)
{ target = "NetworkManager/dnsmasq.d/dyndns.conf";
text = concatMapStrings (n: ''
hostsdir=/run/NetworkManager/hostsdirs/${n}
'') (attrNames cfg.dynamicHosts.hostsDirs);
};
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environment.systemPackages = cfg.packages;
users.groups = [{
name = "networkmanager";
gid = config.ids.gids.networkmanager;
}
{
name = "nm-openvpn";
gid = config.ids.gids.nm-openvpn;
}];
users.users = [{
name = "nm-openvpn";
uid = config.ids.uids.nm-openvpn;
extraGroups = [ "networkmanager" ];
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}
{
name = "nm-iodine";
isSystemUser = true;
group = "networkmanager";
}];
systemd.packages = cfg.packages;
systemd.services."NetworkManager" = {
wantedBy = [ "network.target" ];
restartTriggers = [ configFile ];
preStart = ''
mkdir -m 700 -p /etc/NetworkManager/system-connections
mkdir -m 700 -p /etc/ipsec.d
mkdir -m 755 -p ${stateDirs}
'';
};
systemd.services.nm-setup-hostsdirs = mkIf dynamicHostsEnabled {
wantedBy = [ "NetworkManager.service" ];
before = [ "NetworkManager.service" ];
partOf = [ "NetworkManager.service" ];
script = concatStrings (mapAttrsToList (n: d: ''
mkdir -p "/run/NetworkManager/hostsdirs/${n}"
chown "${d.user}:${d.group}" "/run/NetworkManager/hostsdirs/${n}"
chmod 0775 "/run/NetworkManager/hostsdirs/${n}"
'') cfg.dynamicHosts.hostsDirs);
serviceConfig = {
Type = "oneshot";
RemainAfterExit = true;
};
};
systemd.services."NetworkManager-dispatcher" = {
wantedBy = [ "network.target" ];
restartTriggers = [ configFile ];
# useful binaries for user-specified hooks
path = [ pkgs.iproute pkgs.utillinux pkgs.coreutils ];
};
# Turn off NixOS' network management
networking = {
useDHCP = false;
# use mkDefault to trigger the assertion about the conflict above
wireless.enable = lib.mkDefault false;
};
security.polkit.extraConfig = polkitConf;
networking.networkmanager.packages =
mkIf cfg.enableStrongSwan [ pkgs.networkmanager_strongswan ];
services.dbus.packages =
optional cfg.enableStrongSwan pkgs.strongswanNM ++ cfg.packages;
services.udev.packages = cfg.packages;
};
}