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nixpkgs/nixos/tests/networking.nix

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{ system ? builtins.currentSystem
, config ? {}
, pkgs ? import ../.. { inherit system config; }
# bool: whether to use networkd in the tests
, networkd }:
with import ../lib/testing.nix { inherit system pkgs; };
with pkgs.lib;
let
router = { config, pkgs, ... }:
with pkgs.lib;
let
vlanIfs = range 1 (length config.virtualisation.vlans);
in {
environment.systemPackages = [ pkgs.iptables ]; # to debug firewall rules
virtualisation.vlans = [ 1 2 3 ];
boot.kernel.sysctl."net.ipv6.conf.all.forwarding" = true;
networking = {
useDHCP = false;
useNetworkd = networkd;
firewall.checkReversePath = true;
firewall.allowedUDPPorts = [ 547 ];
interfaces = mkOverride 0 (listToAttrs (flip map vlanIfs (n:
nameValuePair "eth${toString n}" {
ipv4.addresses = [ { address = "192.168.${toString n}.1"; prefixLength = 24; } ];
ipv6.addresses = [ { address = "fd00:1234:5678:${toString n}::1"; prefixLength = 64; } ];
})));
};
services.dhcpd4 = {
enable = true;
interfaces = map (n: "eth${toString n}") vlanIfs;
extraConfig = ''
authoritative;
'' + flip concatMapStrings vlanIfs (n: ''
subnet 192.168.${toString n}.0 netmask 255.255.255.0 {
option routers 192.168.${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 = {
loopback = {
name = "Loopback";
machine.networking.useNetworkd = networkd;
testScript = ''
startAll;
$machine->waitForUnit("network.target");
$machine->succeed("ip addr show lo | grep -q 'inet 127.0.0.1/8 '");
$machine->succeed("ip addr show lo | grep -q 'inet6 ::1/128 '");
'';
};
static = {
name = "Static";
nodes.router = router;
nodes.client = { pkgs, ... }: with pkgs.lib; {
virtualisation.vlans = [ 1 2 ];
networking = {
useNetworkd = networkd;
useDHCP = false;
defaultGateway = "192.168.1.1";
interfaces.eth1.ipv4.addresses = mkOverride 0 [
{ address = "192.168.1.2"; prefixLength = 24; }
{ address = "192.168.1.3"; prefixLength = 32; }
{ address = "192.168.1.10"; prefixLength = 32; }
];
interfaces.eth2.ipv4.addresses = mkOverride 0 [
{ address = "192.168.2.2"; prefixLength = 24; }
];
};
};
testScript = { ... }:
''
startAll;
$client->waitForUnit("network.target");
$router->waitForUnit("network-online.target");
# Make sure dhcpcd is not started
$client->fail("systemctl status dhcpcd.service");
# Test vlan 1
$client->waitUntilSucceeds("ping -c 1 192.168.1.1");
$client->waitUntilSucceeds("ping -c 1 192.168.1.2");
$client->waitUntilSucceeds("ping -c 1 192.168.1.3");
$client->waitUntilSucceeds("ping -c 1 192.168.1.10");
$router->waitUntilSucceeds("ping -c 1 192.168.1.1");
$router->waitUntilSucceeds("ping -c 1 192.168.1.2");
$router->waitUntilSucceeds("ping -c 1 192.168.1.3");
$router->waitUntilSucceeds("ping -c 1 192.168.1.10");
# Test vlan 2
$client->waitUntilSucceeds("ping -c 1 192.168.2.1");
$client->waitUntilSucceeds("ping -c 1 192.168.2.2");
$router->waitUntilSucceeds("ping -c 1 192.168.2.1");
$router->waitUntilSucceeds("ping -c 1 192.168.2.2");
# Test default gateway
$router->waitUntilSucceeds("ping -c 1 192.168.3.1");
$client->waitUntilSucceeds("ping -c 1 192.168.3.1");
'';
};
dhcpSimple = {
name = "SimpleDHCP";
nodes.router = router;
nodes.client = { pkgs, ... }: with pkgs.lib; {
virtualisation.vlans = [ 1 2 ];
networking = {
useNetworkd = networkd;
useDHCP = true;
interfaces.eth1 = {
ipv4.addresses = mkOverride 0 [ ];
ipv6.addresses = mkOverride 0 [ ];
};
interfaces.eth2 = {
ipv4.addresses = mkOverride 0 [ ];
ipv6.addresses = mkOverride 0 [ ];
};
};
};
testScript = { ... }:
''
startAll;
$client->waitForUnit("network.target");
$router->waitForUnit("network-online.target");
# 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("ping -c 1 fd00:1234:5678:1::1");
$client->waitUntilSucceeds("ping -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("ping -c 1 fd00:1234:5678:1::1");
$router->waitUntilSucceeds("ping -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("ping -c 1 fd00:1234:5678:2::1");
$client->waitUntilSucceeds("ping -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("ping -c 1 fd00:1234:5678:2::1");
$router->waitUntilSucceeds("ping -c 1 fd00:1234:5678:2::2");
'';
};
dhcpOneIf = {
name = "OneInterfaceDHCP";
nodes.router = router;
nodes.client = { pkgs, ... }: with pkgs.lib; {
virtualisation.vlans = [ 1 2 ];
networking = {
useNetworkd = networkd;
useDHCP = false;
interfaces.eth1 = {
ipv4.addresses = mkOverride 0 [ ];
useDHCP = true;
};
interfaces.eth2.ipv4.addresses = mkOverride 0 [ ];
};
};
testScript = { ... }:
''
startAll;
# Wait for networking to come up
$client->waitForUnit("network.target");
$router->waitForUnit("network.target");
# Wait until we have an ip address on each interface
$client->waitUntilSucceeds("ip addr show dev eth1 | grep -q '192.168.1'");
# Test vlan 1
$client->waitUntilSucceeds("ping -c 1 192.168.1.1");
$client->waitUntilSucceeds("ping -c 1 192.168.1.2");
$router->waitUntilSucceeds("ping -c 1 192.168.1.1");
$router->waitUntilSucceeds("ping -c 1 192.168.1.2");
# Test vlan 2
$client->waitUntilSucceeds("ping -c 1 192.168.2.1");
$client->fail("ping -c 1 192.168.2.2");
$router->waitUntilSucceeds("ping -c 1 192.168.2.1");
$router->fail("ping -c 1 192.168.2.2");
'';
};
bond = let
node = address: { pkgs, ... }: with pkgs.lib; {
virtualisation.vlans = [ 1 2 ];
networking = {
useNetworkd = networkd;
useDHCP = false;
bonds.bond = {
interfaces = [ "eth1" "eth2" ];
driverOptions.mode = "balance-rr";
};
interfaces.eth1.ipv4.addresses = mkOverride 0 [ ];
interfaces.eth2.ipv4.addresses = mkOverride 0 [ ];
interfaces.bond.ipv4.addresses = mkOverride 0
[ { inherit address; prefixLength = 30; } ];
};
};
in {
name = "Bond";
nodes.client1 = node "192.168.1.1";
nodes.client2 = node "192.168.1.2";
testScript = { ... }:
''
startAll;
# Wait for networking to come up
$client1->waitForUnit("network.target");
$client2->waitForUnit("network.target");
# Test bonding
$client1->waitUntilSucceeds("ping -c 2 192.168.1.1");
$client1->waitUntilSucceeds("ping -c 2 192.168.1.2");
$client2->waitUntilSucceeds("ping -c 2 192.168.1.1");
$client2->waitUntilSucceeds("ping -c 2 192.168.1.2");
'';
};
bridge = let
node = { address, vlan }: { pkgs, ... }: with pkgs.lib; {
virtualisation.vlans = [ vlan ];
networking = {
useNetworkd = networkd;
useDHCP = false;
interfaces.eth1.ipv4.addresses = mkOverride 0
[ { inherit address; prefixLength = 24; } ];
};
};
in {
name = "Bridge";
nodes.client1 = node { address = "192.168.1.2"; vlan = 1; };
nodes.client2 = node { address = "192.168.1.3"; vlan = 2; };
nodes.router = { pkgs, ... }: with pkgs.lib; {
virtualisation.vlans = [ 1 2 ];
networking = {
useNetworkd = networkd;
useDHCP = false;
bridges.bridge.interfaces = [ "eth1" "eth2" ];
interfaces.eth1.ipv4.addresses = mkOverride 0 [ ];
interfaces.eth2.ipv4.addresses = mkOverride 0 [ ];
interfaces.bridge.ipv4.addresses = mkOverride 0
[ { address = "192.168.1.1"; prefixLength = 24; } ];
};
};
testScript = { ... }:
''
startAll;
# Wait for networking to come up
$client1->waitForUnit("network.target");
$client2->waitForUnit("network.target");
$router->waitForUnit("network.target");
# Test bridging
$client1->waitUntilSucceeds("ping -c 1 192.168.1.1");
$client1->waitUntilSucceeds("ping -c 1 192.168.1.2");
$client1->waitUntilSucceeds("ping -c 1 192.168.1.3");
$client2->waitUntilSucceeds("ping -c 1 192.168.1.1");
$client2->waitUntilSucceeds("ping -c 1 192.168.1.2");
$client2->waitUntilSucceeds("ping -c 1 192.168.1.3");
$router->waitUntilSucceeds("ping -c 1 192.168.1.1");
$router->waitUntilSucceeds("ping -c 1 192.168.1.2");
$router->waitUntilSucceeds("ping -c 1 192.168.1.3");
'';
};
macvlan = {
name = "MACVLAN";
nodes.router = router;
nodes.client = { pkgs, ... }: with pkgs.lib; {
environment.systemPackages = [ pkgs.iptables ]; # to debug firewall rules
virtualisation.vlans = [ 1 ];
networking = {
useNetworkd = networkd;
firewall.logReversePathDrops = true; # to debug firewall rules
# reverse path filtering rules for the macvlan interface seem
# to be incorrect, causing the test to fail. Disable temporarily.
firewall.checkReversePath = false;
useDHCP = true;
macvlans.macvlan.interface = "eth1";
interfaces.eth1.ipv4.addresses = mkOverride 0 [ ];
};
};
testScript = { ... }:
''
startAll;
# Wait for networking to come up
$client->waitForUnit("network.target");
$router->waitForUnit("network.target");
# 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 macvlan | grep -q '192.168.1'");
# Print lots of diagnostic information
$router->log('**********************************************');
$router->succeed("ip addr >&2");
$router->succeed("ip route >&2");
$router->execute("iptables-save >&2");
$client->log('==============================================');
$client->succeed("ip addr >&2");
$client->succeed("ip route >&2");
$client->execute("iptables-save >&2");
$client->log('##############################################');
# Test macvlan creates routable ips
$client->waitUntilSucceeds("ping -c 1 192.168.1.1");
$client->waitUntilSucceeds("ping -c 1 192.168.1.2");
$client->waitUntilSucceeds("ping -c 1 192.168.1.3");
$router->waitUntilSucceeds("ping -c 1 192.168.1.1");
$router->waitUntilSucceeds("ping -c 1 192.168.1.2");
$router->waitUntilSucceeds("ping -c 1 192.168.1.3");
'';
};
sit = let
node = { address4, remote, address6 }: { pkgs, ... }: with pkgs.lib; {
virtualisation.vlans = [ 1 ];
networking = {
useNetworkd = networkd;
firewall.enable = false;
useDHCP = false;
sits.sit = {
inherit remote;
local = address4;
dev = "eth1";
};
interfaces.eth1.ipv4.addresses = mkOverride 0
[ { address = address4; prefixLength = 24; } ];
interfaces.sit.ipv6.addresses = mkOverride 0
[ { address = address6; prefixLength = 64; } ];
};
};
in {
name = "Sit";
nodes.client1 = node { address4 = "192.168.1.1"; remote = "192.168.1.2"; address6 = "fc00::1"; };
nodes.client2 = node { address4 = "192.168.1.2"; remote = "192.168.1.1"; address6 = "fc00::2"; };
testScript = { ... }:
''
startAll;
# Wait for networking to be configured
$client1->waitForUnit("network.target");
$client2->waitForUnit("network.target");
# Print diagnostic information
$client1->succeed("ip addr >&2");
$client2->succeed("ip addr >&2");
# Test ipv6
$client1->waitUntilSucceeds("ping -c 1 fc00::1");
$client1->waitUntilSucceeds("ping -c 1 fc00::2");
$client2->waitUntilSucceeds("ping -c 1 fc00::1");
$client2->waitUntilSucceeds("ping -c 1 fc00::2");
'';
};
vlan = let
node = address: { pkgs, ... }: with pkgs.lib; {
#virtualisation.vlans = [ 1 ];
networking = {
useNetworkd = networkd;
useDHCP = false;
vlans.vlan = {
id = 1;
interface = "eth0";
};
interfaces.eth0.ipv4.addresses = mkOverride 0 [ ];
interfaces.eth1.ipv4.addresses = mkOverride 0 [ ];
interfaces.vlan.ipv4.addresses = mkOverride 0
[ { inherit address; prefixLength = 24; } ];
};
};
in {
name = "vlan";
nodes.client1 = node "192.168.1.1";
nodes.client2 = node "192.168.1.2";
testScript = { ... }:
''
startAll;
# Wait for networking to be configured
$client1->waitForUnit("network.target");
$client2->waitForUnit("network.target");
# Test vlan is setup
$client1->succeed("ip addr show dev vlan >&2");
$client2->succeed("ip addr show dev vlan >&2");
'';
};
virtual = {
name = "Virtual";
machine = {
networking.interfaces."tap0" = {
ipv4.addresses = [ { address = "192.168.1.1"; prefixLength = 24; } ];
ipv6.addresses = [ { address = "2001:1470:fffd:2096::"; prefixLength = 64; } ];
virtual = true;
};
networking.interfaces."tun0" = {
ipv4.addresses = [ { address = "192.168.1.2"; prefixLength = 24; } ];
ipv6.addresses = [ { address = "2001:1470:fffd:2097::"; prefixLength = 64; } ];
virtual = true;
};
};
testScript = ''
my $targetList = <<'END';
tap0: tap persist user 0
tun0: tun persist user 0
END
# Wait for networking to come up
$machine->start;
$machine->waitForUnit("network-online.target");
# Test interfaces set up
my $list = $machine->succeed("ip tuntap list | sort");
"$list" eq "$targetList" or die(
"The list of virtual interfaces does not match the expected one:\n",
"Result:\n", "$list\n",
"Expected:\n", "$targetList\n"
);
# Test interfaces clean up
$machine->succeed("systemctl stop network-addresses-tap0");
$machine->sleep(10);
$machine->succeed("systemctl stop network-addresses-tun0");
$machine->sleep(10);
my $residue = $machine->succeed("ip tuntap list");
$residue eq "" or die(
"Some virtual interface has not been properly cleaned:\n",
"$residue\n"
);
'';
};
privacy = {
name = "Privacy";
nodes.router = { ... }: {
virtualisation.vlans = [ 1 ];
boot.kernel.sysctl."net.ipv6.conf.all.forwarding" = true;
networking = {
useNetworkd = networkd;
interfaces.eth1.ipv6.addresses = singleton {
address = "fd00:1234:5678:1::1";
prefixLength = 64;
};
};
services.radvd = {
enable = true;
config = ''
interface eth1 {
AdvSendAdvert on;
AdvManagedFlag on;
AdvOtherConfigFlag on;
prefix fd00:1234:5678:1::/64 {
AdvAutonomous on;
AdvOnLink on;
};
};
'';
};
};
nodes.clientWithPrivacy = { pkgs, ... }: with pkgs.lib; {
virtualisation.vlans = [ 1 ];
networking = {
useNetworkd = networkd;
useDHCP = true;
interfaces.eth1 = {
preferTempAddress = true;
ipv4.addresses = mkOverride 0 [ ];
ipv6.addresses = mkOverride 0 [ ];
};
};
};
nodes.client = { pkgs, ... }: with pkgs.lib; {
virtualisation.vlans = [ 1 ];
networking = {
useNetworkd = networkd;
useDHCP = true;
interfaces.eth1 = {
preferTempAddress = false;
ipv4.addresses = mkOverride 0 [ ];
ipv6.addresses = mkOverride 0 [ ];
};
};
};
testScript = { ... }:
''
startAll;
$client->waitForUnit("network.target");
$clientWithPrivacy->waitForUnit("network.target");
$router->waitForUnit("network-online.target");
# Wait until we have an ip address
$clientWithPrivacy->waitUntilSucceeds("ip addr show dev eth1 | grep -q 'fd00:1234:5678:1:'");
$client->waitUntilSucceeds("ip addr show dev eth1 | grep -q 'fd00:1234:5678:1:'");
# Test vlan 1
$clientWithPrivacy->waitUntilSucceeds("ping -c 1 fd00:1234:5678:1::1");
$client->waitUntilSucceeds("ping -c 1 fd00:1234:5678:1::1");
# Test address used is temporary
$clientWithPrivacy->waitUntilSucceeds("! ip route get fd00:1234:5678:1::1 | grep -q ':[a-f0-9]*ff:fe[a-f0-9]*:'");
# Test address used is EUI-64
$client->waitUntilSucceeds("ip route get fd00:1234:5678:1::1 | grep -q ':[a-f0-9]*ff:fe[a-f0-9]*:'");
'';
};
routes = {
name = "routes";
machine = {
networking.useDHCP = false;
networking.interfaces."eth0" = {
ipv4.addresses = [ { address = "192.168.1.2"; prefixLength = 24; } ];
ipv6.addresses = [ { address = "2001:1470:fffd:2097::"; prefixLength = 64; } ];
ipv6.routes = [
{ address = "fdfd:b3f0::"; prefixLength = 48; }
{ address = "2001:1470:fffd:2098::"; prefixLength = 64; via = "fdfd:b3f0::1"; }
];
ipv4.routes = [
{ address = "10.0.0.0"; prefixLength = 16; options = { mtu = "1500"; }; }
{ address = "192.168.2.0"; prefixLength = 24; via = "192.168.1.1"; }
];
};
virtualisation.vlans = [ ];
};
testScript = ''
my $targetIPv4Table = <<'END';
10.0.0.0/16 proto static scope link mtu 1500
192.168.1.0/24 proto kernel scope link src 192.168.1.2
192.168.2.0/24 via 192.168.1.1 proto static
END
my $targetIPv6Table = <<'END';
2001:1470:fffd:2097::/64 proto kernel metric 256 pref medium
2001:1470:fffd:2098::/64 via fdfd:b3f0::1 proto static metric 1024 pref medium
fdfd:b3f0::/48 proto static metric 1024 pref medium
END
$machine->start;
$machine->waitForUnit("network.target");
# test routing tables
my $ipv4Table = $machine->succeed("ip -4 route list dev eth0 | head -n3");
my $ipv6Table = $machine->succeed("ip -6 route list dev eth0 | head -n3");
"$ipv4Table" eq "$targetIPv4Table" or die(
"The IPv4 routing table does not match the expected one:\n",
"Result:\n", "$ipv4Table\n",
"Expected:\n", "$targetIPv4Table\n"
);
"$ipv6Table" eq "$targetIPv6Table" or die(
"The IPv6 routing table does not match the expected one:\n",
"Result:\n", "$ipv6Table\n",
"Expected:\n", "$targetIPv6Table\n"
);
# test clean-up of the tables
$machine->succeed("systemctl stop network-addresses-eth0");
my $ipv4Residue = $machine->succeed("ip -4 route list dev eth0 | head -n-3");
my $ipv6Residue = $machine->succeed("ip -6 route list dev eth0 | head -n-3");
$ipv4Residue eq "" or die(
"The IPv4 routing table has not been properly cleaned:\n",
"$ipv4Residue\n"
);
$ipv6Residue eq "" or die(
"The IPv6 routing table has not been properly cleaned:\n",
"$ipv6Residue\n"
);
'';
};
};
in mapAttrs (const (attrs: makeTest (attrs // {
name = "${attrs.name}-Networking-${if networkd then "Networkd" else "Scripted"}";
}))) testCases
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