nixpkgs/modules/tasks/network-interfaces.nix

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{pkgs, config, ...}:
###### implementation
let
inherit (pkgs) nettools wirelesstools bash writeText;
cfg = config.networking;
# !!! use XML
names = map (i: i.name) cfg.interfaces;
ipAddresses = map (i: if i ? ipAddress then i.ipAddress else "dhcp") cfg.interfaces;
subnetMasks = map (i: if i ? subnetMask then i.subnetMask else "default") cfg.interfaces;
essids = map (i: if i ? essid then i.essid else "default") cfg.interfaces;
wepKeys = map (i: if i ? wepKey then i.wepKey else "nokey") cfg.interfaces;
modprobe = config.system.sbin.modprobe;
in
{
services = {
extraJobs = [{
name = "network-interfaces";
job = ''
start on udev
stop on shutdown
start script
export PATH=${modprobe}/sbin:$PATH
modprobe af_packet || true
for i in $(cd /sys/class/net && ls -d *); do
echo "Bringing up network device $i..."
${nettools}/sbin/ifconfig $i up || true
done
# Configure the manually specified interfaces.
names=(${toString names})
ipAddresses=(${toString ipAddresses})
subnetMasks=(${toString subnetMasks})
essids=(${toString essids})
wepKeys=(${toString wepKeys})
for ((n = 0; n < ''${#names[*]}; n++)); do
name=''${names[$n]}
ipAddress=''${ipAddresses[$n]}
subnetMask=''${subnetMasks[$n]}
essid=''${essids[$n]}
wepKey=''${wepKeys[$n]}
# Set wireless networking stuff.
if test "$essid" != default; then
${wirelesstools}/sbin/iwconfig "$name" essid "$essid" || true
fi
if test "$wepKey" != nokey; then
${wirelesstools}/sbin/iwconfig "$name" key "$(cat "$wepKey")" || true
fi
# Set IP address / netmask.
if test "$ipAddress" != dhcp; then
echo "Configuring interface $name..."
extraFlags=
if test "$subnetMask" != default; then
extraFlags="$extraFlags netmask $subnetMask"
fi
${nettools}/sbin/ifconfig "$name" "$ipAddress" $extraFlags || true
fi
done
# Set the nameservers.
if test -n "${toString cfg.nameservers}"; then
rm -f /etc/resolv.conf
if test -n "${cfg.domain}"; then
echo "domain ${cfg.domain}" >> /etc/resolv.conf
fi
for i in ${toString cfg.nameservers}; do
echo "nameserver $i" >> /etc/resolv.conf
done
fi
# Set the default gateway.
if test -n "${cfg.defaultGateway}"; then
${nettools}/sbin/route add default gw "${cfg.defaultGateway}" || true
fi
# Run any user-specified commands.
${bash}/bin/sh ${writeText "local-net-cmds" cfg.localCommands} || true
end script
# Hack: Upstart doesn't yet support what we want: a service that
# doesn't have a running process associated with it.
respawn sleep 100000
stop script
for i in $(cd /sys/class/net && ls -d *); do
echo "Taking down network device $i..."
${nettools}/sbin/ifconfig $i down || true
done
end script
'';
}];
};
}