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networking: add options for configuring virtual devices (tun/tap)

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These are mainly useful for network tunnels (vpn/ipv6) and creating
bridges for virtual machines
This commit is contained in:
Mathijs Kwik 2012-08-29 22:15:04 +02:00
parent d106a8a296
commit 0dd46d1335
1 changed files with 32 additions and 1 deletions
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33
modules/tasks/network-interfaces.nix
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@ -5,6 +5,7 @@ with pkgs.lib;
let
cfg = config.networking;
hasVirtuals = any (i: i.virtual) cfg.interfaces;
in
@ -119,6 +120,26 @@ in
'';
};
virtual = mkOption {
default = false;
type = types.bool;
description = ''
Whether this interface is virtual and should be created by tunctl.
This is mainly useful for creating bridges between a host a virtual
network such as VPN or a virtual machine.
Defaults to tap device, unless interface contains "tun" in its name.
'';
};
virtualOwner = mkOption {
default = "root";
type = types.uniq types.string;
description = ''
In case of a virtual device, the user who owns it.
'';
};
};
};
@ -179,7 +200,7 @@ in
config = {
boot.kernelModules = optional cfg.enableIPv6 "ipv6";
boot.kernelModules = optional cfg.enableIPv6 "ipv6" ++ optional hasVirtuals "tun";
environment.systemPackages =
[ pkgs.host
@ -191,6 +212,7 @@ in
pkgs.openresolv
]
++ optional (cfg.bridges != {}) pkgs.bridge_utils
++ optional hasVirtuals pkgs.tunctl
++ optional cfg.enableIPv6 pkgs.ndisc6;
security.setuidPrograms = [ "ping" "ping6" ];
@ -206,6 +228,15 @@ in
''
set +e # continue in case of errors
# Create virtual network interfaces
${flip concatMapStrings cfg.interfaces (i:
optionalString i.virtual
''
echo "Creating virtual network interface ${i.name}..."
${pkgs.tunctl}/bin/tunctl -t "${i.name}" -u "${i.virtualOwner}"
'')
}
# Set MAC addresses of interfaces, if desired.
${flip concatMapStrings cfg.interfaces (i:
optionalString (i.macAddress != "")