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93 lines
2.4 KiB
Nix
93 lines
2.4 KiB
Nix
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{ config, pkgs, ... }:
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with pkgs.lib;
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let
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inherit (pkgs) dhcpcd;
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# Don't start dhclient on explicitly configured interfaces or on
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# interfaces that are part of a bridge.
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ignoredInterfaces =
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map (i: i.name) (filter (i: i ? ipAddress && i.ipAddress != "" ) config.networking.interfaces)
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++ concatLists (attrValues (mapAttrs (n: v: v.interfaces) config.networking.bridges));
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in
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{
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###### interface
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options = {
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networking.useDHCP = mkOption {
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default = true;
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merge = mergeEnableOption;
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description = "
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Whether to use DHCP to obtain an IP adress and other
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configuration for all network interfaces that are not manually
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configured.
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";
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};
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};
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###### implementation
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config = mkIf config.networking.useDHCP {
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jobs.dhcpcd =
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{ startOn = "started network-interfaces";
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stopOn = "stopping network-interfaces";
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path = [ dhcpcd pkgs.nettools pkgs.openresolv ];
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script =
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''
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# Determine the interface on which to start dhcpcd.
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interfaces=
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for i in $(cd /sys/class/net && ls -d *); do
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# Only run dhcpcd on interfaces of type ARPHRD_ETHER
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# (1), i.e. Ethernet. Ignore peth* devices; on Xen,
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# they're renamed physical Ethernet cards used for
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# bridging. Likewise for vif* and tap* (Xen) and
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# virbr* and vnet* (libvirt).
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if [ "$(cat /sys/class/net/$i/type)" = 1 ]; then
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if ! for j in ${toString ignoredInterfaces}; do echo $j; done | grep -F -x -q "$i" &&
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! echo "$i" | grep -x -q "peth.*\|vif.*\|tap.*\|virbr.*\|vnet.*";
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then
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echo "Running dhcpcd on $i"
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interfaces="$interfaces $i"
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fi
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fi
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done
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if [ -z "$interfaces" ]; then
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echo 'No interfaces on which to start dhcpcd!'
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exit 1
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fi
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exec dhcpcd --nobackground --persistent $interfaces
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'';
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};
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environment.systemPackages = [ dhcpcd ];
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powerManagement.resumeCommands =
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''
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${config.system.build.upstart}/sbin/restart dhcpcd
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'';
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networking.interfaceMonitor.commands =
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''
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if [ "$status" = up ]; then
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${config.system.build.upstart}/sbin/restart dhcpcd
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fi
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'';
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};
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}
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