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Merge pull request #21882 from abbradar/dhcp6

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DHCPv6 improvements
This commit is contained in:
Nikolay Amiantov 2017-01-15 19:53:33 +03:00 committed by GitHub
commit 70a6628848
5 changed files with 222 additions and 120 deletions
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3
nixos/modules/rename.nix
View File

@ -164,6 +164,9 @@ with lib;
else { addr = value inetAddr; port = value inetPort; }
))
# dhcpd
(mkRenamedOptionModule [ "services" "dhcpd" ] [ "services" "dhcpd4" ])
# Options that are obsolete and have no replacement.
(mkRemovedOptionModule [ "boot" "initrd" "luks" "enable" ] "")
(mkRemovedOptionModule [ "programs" "bash" "enable" ] "")

262
nixos/modules/services/networking/dhcpd.nix
View File

@ -4,11 +4,10 @@ with lib;
let
cfg = config.services.dhcpd;
cfg4 = config.services.dhcpd4;
cfg6 = config.services.dhcpd6;
stateDir = "/var/lib/dhcp"; # Don't use /var/state/dhcp; not FHS-compliant.
configFile = if cfg.configFile != null then cfg.configFile else pkgs.writeText "dhcpd.conf"
writeConfig = cfg: pkgs.writeText "dhcpd.conf"
''
default-lease-time 600;
max-lease-time 7200;
@ -29,6 +28,154 @@ let
}
'';
dhcpdService = postfix: cfg: optionalAttrs cfg.enable {
"dhcpd${postfix}" = {
description = "DHCPv${postfix} server";
wantedBy = [ "multi-user.target" ];
after = [ "network.target" ];
preStart = ''
mkdir -m 755 -p ${cfg.stateDir}
touch ${cfg.stateDir}/dhcpd.leases
'';
serviceConfig =
let
configFile = if cfg.configFile != null then cfg.configFile else writeConfig cfg;
args = [ "@${pkgs.dhcp}/sbin/dhcpd" "dhcpd${postfix}" "-${postfix}"
"-pf" "/run/dhcpd${postfix}/dhcpd.pid"
"-cf" "${configFile}"
"-lf" "${cfg.stateDir}/dhcpd.leases"
"-user" "dhcpd" "-group" "nogroup"
] ++ cfg.extraFlags
++ cfg.interfaces;
in {
ExecStart = concatMapStringsSep " " escapeShellArg args;
Type = "forking";
Restart = "always";
RuntimeDirectory = [ "dhcpd${postfix}" ];
PIDFile = "/run/dhcpd${postfix}/dhcpd.pid";
};
};
};
machineOpts = {...}: {
config = {
hostName = mkOption {
type = types.str;
example = "foo";
description = ''
Hostname which is assigned statically to the machine.
'';
};
ethernetAddress = mkOption {
type = types.str;
example = "00:16:76:9a:32:1d";
description = ''
MAC address of the machine.
'';
};
ipAddress = mkOption {
type = types.str;
example = "192.168.1.10";
description = ''
IP address of the machine.
'';
};
};
};
dhcpConfig = postfix: {
enable = mkOption {
type = types.bool;
default = false;
description = ''
Whether to enable the DHCPv${postfix} server.
'';
};
stateDir = mkOption {
type = types.path;
# We use /var/lib/dhcp for DHCPv4 to save backwards compatibility.
default = "/var/lib/dhcp${if postfix == "4" then "" else postfix}";
description = ''
State directory for the DHCP server.
'';
};
extraConfig = mkOption {
type = types.lines;
default = "";
example = ''
option subnet-mask 255.255.255.0;
option broadcast-address 192.168.1.255;
option routers 192.168.1.5;
option domain-name-servers 130.161.158.4, 130.161.33.17, 130.161.180.1;
option domain-name "example.org";
subnet 192.168.1.0 netmask 255.255.255.0 {
range 192.168.1.100 192.168.1.200;
}
'';
description = ''
Extra text to be appended to the DHCP server configuration
file. Currently, you almost certainly need to specify something
there, such as the options specifying the subnet mask, DNS servers,
etc.
'';
};
extraFlags = mkOption {
type = types.listOf types.str;
default = [];
description = ''
Additional command line flags to be passed to the dhcpd daemon.
'';
};
configFile = mkOption {
type = types.nullOr types.path;
default = null;
description = ''
The path of the DHCP server configuration file. If no file
is specified, a file is generated using the other options.
'';
};
interfaces = mkOption {
type = types.listOf types.str;
default = ["eth0"];
description = ''
The interfaces on which the DHCP server should listen.
'';
};
machines = mkOption {
type = types.listOf (types.submodule machineOpts);
default = [];
example = [
{ hostName = "foo";
ethernetAddress = "00:16:76:9a:32:1d";
ipAddress = "192.168.1.10";
}
{ hostName = "bar";
ethernetAddress = "00:19:d1:1d:c4:9a";
ipAddress = "192.168.1.11";
}
];
description = ''
A list mapping Ethernet addresses to IPv${postfix} addresses for the
DHCP server.
'';
};
};
in
{
@ -37,85 +184,15 @@ in
options = {
services.dhcpd = {
enable = mkOption {
default = false;
description = "
Whether to enable the DHCP server.
";
};
extraConfig = mkOption {
type = types.lines;
default = "";
example = ''
option subnet-mask 255.255.255.0;
option broadcast-address 192.168.1.255;
option routers 192.168.1.5;
option domain-name-servers 130.161.158.4, 130.161.33.17, 130.161.180.1;
option domain-name "example.org";
subnet 192.168.1.0 netmask 255.255.255.0 {
range 192.168.1.100 192.168.1.200;
}
'';
description = "
Extra text to be appended to the DHCP server configuration
file. Currently, you almost certainly need to specify
something here, such as the options specifying the subnet
mask, DNS servers, etc.
";
};
extraFlags = mkOption {
default = "";
example = "-6";
description = "
Additional command line flags to be passed to the dhcpd daemon.
";
};
configFile = mkOption {
default = null;
description = "
The path of the DHCP server configuration file. If no file
is specified, a file is generated using the other options.
";
};
interfaces = mkOption {
default = ["eth0"];
description = "
The interfaces on which the DHCP server should listen.
";
};
machines = mkOption {
default = [];
example = [
{ hostName = "foo";
ethernetAddress = "00:16:76:9a:32:1d";
ipAddress = "192.168.1.10";
}
{ hostName = "bar";
ethernetAddress = "00:19:d1:1d:c4:9a";
ipAddress = "192.168.1.11";
}
];
description = "
A list mapping ethernet addresses to IP addresses for the
DHCP server.
";
};
};
services.dhcpd4 = dhcpConfig "4";
services.dhcpd6 = dhcpConfig "6";
};
###### implementation
config = mkIf config.services.dhcpd.enable {
config = mkIf (cfg4.enable || cfg6.enable) {
users = {
extraUsers.dhcpd = {
@ -124,36 +201,7 @@ in
};
};
systemd.services.dhcpd =
{ description = "DHCP server";
wantedBy = [ "multi-user.target" ];
after = [ "network.target" ];
path = [ pkgs.dhcp ];
preStart =
''
mkdir -m 755 -p ${stateDir}
touch ${stateDir}/dhcpd.leases
mkdir -m 755 -p /run/dhcpd
chown dhcpd /run/dhcpd
'';
serviceConfig =
{ ExecStart = "@${pkgs.dhcp}/sbin/dhcpd dhcpd"
+ " -pf /run/dhcpd/dhcpd.pid -cf ${configFile}"
+ " -lf ${stateDir}/dhcpd.leases -user dhcpd -group nogroup"
+ " ${cfg.extraFlags}"
+ " ${toString cfg.interfaces}";
Restart = "always";
Type = "forking";
PIDFile = "/run/dhcpd/dhcpd.pid";
};
};
systemd.services = dhcpdService "4" cfg4 // dhcpdService "6" cfg6;
};

9
nixos/modules/services/networking/firewall.nix
View File

@ -172,13 +172,16 @@ let
}-j nixos-fw-accept
''}
# Accept all ICMPv6 messages except redirects and node
# information queries (type 139). See RFC 4890, section
# 4.4.
${optionalString config.networking.enableIPv6 ''
# Accept all ICMPv6 messages except redirects and node
# information queries (type 139). See RFC 4890, section
# 4.4.
ip6tables -A nixos-fw -p icmpv6 --icmpv6-type redirect -j DROP
ip6tables -A nixos-fw -p icmpv6 --icmpv6-type 139 -j DROP
ip6tables -A nixos-fw -p icmpv6 -j nixos-fw-accept
# Allow this host to act as a DHCPv6 client
ip6tables -A nixos-fw -d fe80::/64 -p udp --dport 546 -j nixos-fw-accept
''}
${cfg.extraCommands}

58
nixos/tests/networking.nix
View File

@ -10,29 +10,61 @@ let
vlanIfs = range 1 (length config.virtualisation.vlans);
in {
virtualisation.vlans = [ 1 2 3 ];
boot.kernel.sysctl."net.ipv6.conf.all.forwarding" = true;
networking = {
useDHCP = false;
useNetworkd = networkd;
firewall.allowPing = true;
firewall.checkReversePath = true;
firewall.allowedUDPPorts = [ 547 ];
interfaces = mkOverride 0 (listToAttrs (flip map vlanIfs (n:
nameValuePair "eth${toString n}" {
ipAddress = "192.168.${toString n}.1";
prefixLength = 24;
ipv6Address = "fd00:1234:5678:${toString n}::1";
ipv6PrefixLength = 64;
})));
};
services.dhcpd = {
services.dhcpd4 = {
enable = true;
interfaces = map (n: "eth${toString n}") vlanIfs;
extraConfig = ''
option subnet-mask 255.255.255.0;
authoritative;
'' + flip concatMapStrings vlanIfs (n: ''
subnet 192.168.${toString n}.0 netmask 255.255.255.0 {
option broadcast-address 192.168.${toString n}.255;
option routers 192.168.${toString n}.1;
# XXX: technically it's _not guaranteed_ that IP addresses will be
# issued from the first item in range onwards! We assume that in
# our tests however.
range 192.168.${toString n}.2 192.168.${toString n}.254;
}
'');
};
services.radvd = {
enable = true;
config = flip concatMapStrings vlanIfs (n: ''
interface eth${toString n} {
AdvSendAdvert on;
AdvManagedFlag on;
AdvOtherConfigFlag on;
prefix fd00:1234:5678:${toString n}::/64 {
AdvAutonomous off;
};
};
'');
};
services.dhcpd6 = {
enable = true;
interfaces = map (n: "eth${toString n}") vlanIfs;
extraConfig = ''
authoritative;
'' + flip concatMapStrings vlanIfs (n: ''
subnet6 fd00:1234:5678:${toString n}::/64 {
range6 fd00:1234:5678:${toString n}::2 fd00:1234:5678:${toString n}::2;
}
'');
};
};
testCases = {
@ -108,8 +140,14 @@ let
useNetworkd = networkd;
firewall.allowPing = true;
useDHCP = true;
interfaces.eth1.ip4 = mkOverride 0 [ ];
interfaces.eth2.ip4 = mkOverride 0 [ ];
interfaces.eth1 = {
ip4 = mkOverride 0 [ ];
ip6 = mkOverride 0 [ ];
};
interfaces.eth2 = {
ip4 = mkOverride 0 [ ];
ip6 = mkOverride 0 [ ];
};
};
};
testScript = { nodes, ... }:
@ -121,21 +159,31 @@ let
# Wait until we have an ip address on each interface
$client->waitUntilSucceeds("ip addr show dev eth1 | grep -q '192.168.1'");
$client->waitUntilSucceeds("ip addr show dev eth1 | grep -q 'fd00:1234:5678:1:'");
$client->waitUntilSucceeds("ip addr show dev eth2 | grep -q '192.168.2'");
$client->waitUntilSucceeds("ip addr show dev eth2 | grep -q 'fd00:1234:5678:2:'");
# Test vlan 1
$client->waitUntilSucceeds("ping -c 1 192.168.1.1");
$client->waitUntilSucceeds("ping -c 1 192.168.1.2");
$client->waitUntilSucceeds("ping6 -c 1 fd00:1234:5678:1::1");
$client->waitUntilSucceeds("ping6 -c 1 fd00:1234:5678:1::2");
$router->waitUntilSucceeds("ping -c 1 192.168.1.1");
$router->waitUntilSucceeds("ping -c 1 192.168.1.2");
$router->waitUntilSucceeds("ping6 -c 1 fd00:1234:5678:1::1");
$router->waitUntilSucceeds("ping6 -c 1 fd00:1234:5678:1::2");
# Test vlan 2
$client->waitUntilSucceeds("ping -c 1 192.168.2.1");
$client->waitUntilSucceeds("ping -c 1 192.168.2.2");
$client->waitUntilSucceeds("ping6 -c 1 fd00:1234:5678:2::1");
$client->waitUntilSucceeds("ping6 -c 1 fd00:1234:5678:2::2");
$router->waitUntilSucceeds("ping -c 1 192.168.2.1");
$router->waitUntilSucceeds("ping -c 1 192.168.2.2");
$router->waitUntilSucceeds("ping6 -c 1 fd00:1234:5678:2::1");
$router->waitUntilSucceeds("ping6 -c 1 fd00:1234:5678:2::2");
'';
};
dhcpOneIf = {

10
pkgs/tools/networking/radvd/default.nix
View File

@ -1,16 +1,16 @@
{ stdenv, fetchurl, pkgconfig, libdaemon, bison, flex, check }:
stdenv.mkDerivation rec {
name = "radvd-2.13";
name = "radvd-${version}";
version = "2.15";
src = fetchurl {
url = "http://www.litech.org/radvd/dist/${name}.tar.xz";
sha256 = "1lzgg6zpizcldb78n5gkykjnpr7sqm4r1xy9bm4ig0chbrink4ka";
sha256 = "09spyj4f05rjx21v8vmyqmmj0fz1wx810s63md1vf05hyzd0v8dk";
};
buildInputs = [ pkgconfig libdaemon bison flex check ];
hardeningEnable = [ "pie" ];
nativeBuildInputs = [ pkgconfig bison flex check ];
buildInputs = [ libdaemon ];
meta = with stdenv.lib; {
homepage = http://www.litech.org/radvd/;