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nixos/network-interfaces: add option to set source address

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This commit is contained in:
rnhmjoj
2025-06-14 02:37:40 +02:00
parent a1a86470e3
commit 1a8c90128b
4 changed files with 71 additions and 34 deletions
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74
nixos/modules/tasks/network-interfaces-scripted.nix
View File

@@ -42,6 +42,14 @@ let
ip link del dev "${i}" 2>/dev/null || true
'';
formatIpArgs =
args:
lib.pipe args [
(lib.filterAttrs (n: v: v != null))
(lib.mapAttrsToList (n: v: "${n} ${toString v}"))
(lib.concatStringsSep " ")
];
# warn that these attributes are deprecated (2017-2-2)
# Should be removed in the release after next
bondDeprecation = rec {
@@ -160,39 +168,41 @@ let
EOF
''}
# Set the default gateway.
${optionalString (cfg.defaultGateway != null && cfg.defaultGateway.address != "") ''
${optionalString (cfg.defaultGateway.interface != null) ''
ip route replace ${cfg.defaultGateway.address} dev ${cfg.defaultGateway.interface} ${
optionalString (cfg.defaultGateway.metric != null) "metric ${toString cfg.defaultGateway.metric}"
} proto static
''}
ip route replace default ${
optionalString (cfg.defaultGateway.metric != null) "metric ${toString cfg.defaultGateway.metric}"
} via "${cfg.defaultGateway.address}" ${
optionalString (
cfg.defaultGatewayWindowSize != null
) "window ${toString cfg.defaultGatewayWindowSize}"
} ${
optionalString (cfg.defaultGateway.interface != null) "dev ${cfg.defaultGateway.interface}"
} proto static
''}
${optionalString (cfg.defaultGateway6 != null && cfg.defaultGateway6.address != "") ''
${optionalString (cfg.defaultGateway6.interface != null) ''
ip -6 route replace ${cfg.defaultGateway6.address} dev ${cfg.defaultGateway6.interface} ${
optionalString (cfg.defaultGateway6.metric != null) "metric ${toString cfg.defaultGateway6.metric}"
} proto static
''}
ip -6 route replace default ${
optionalString (cfg.defaultGateway6.metric != null) "metric ${toString cfg.defaultGateway6.metric}"
} via "${cfg.defaultGateway6.address}" ${
optionalString (
cfg.defaultGatewayWindowSize != null
) "window ${toString cfg.defaultGatewayWindowSize}"
} ${
optionalString (cfg.defaultGateway6.interface != null) "dev ${cfg.defaultGateway6.interface}"
} proto static
# Set the default gateway
${flip concatMapStrings
[
{
version = "-4";
gateway = cfg.defaultGateway;
}
{
version = "-6";
gateway = cfg.defaultGateway6;
}
]
(
{ version, gateway }:
optionalString (gateway != null && gateway.address != "") ''
${optionalString (gateway.interface != null) ''
ip ${version} route replace ${gateway.address} proto static ${
formatIpArgs {
metric = gateway.metric;
dev = gateway.interface;
}
}
''}
ip ${version} route replace default proto static ${
formatIpArgs {
metric = gateway.metric;
via = gateway.address;
window = cfg.defaultGatewayWindowSize;
dev = gateway.interface;
src = gateway.source;
}
}
''
)
}
'';
};

3
nixos/modules/tasks/network-interfaces-systemd.nix
View File

@@ -46,6 +46,9 @@ let
// optionalAttrs (gateway.metric != null) {
Metric = gateway.metric;
}
// optionalAttrs (gateway.source != null) {
PreferredSource = gateway.source;
}
)
];
};

8
nixos/modules/tasks/network-interfaces.nix
View File

@@ -180,6 +180,12 @@ let
description = "The default gateway metric/preference.";
};
source = mkOption {
type = types.nullOr types.str;
default = null;
description = "The default source address.";
};
};
};
@@ -656,6 +662,7 @@ in
example = {
address = "131.211.84.1";
interface = "enp3s0";
source = "131.211.84.2";
};
type = types.nullOr (types.coercedTo types.str gatewayCoerce (types.submodule gatewayOpts));
description = ''
@@ -669,6 +676,7 @@ in
example = {
address = "2001:4d0:1e04:895::1";
interface = "enp3s0";
source = "2001:4d0:1e04:895::2";
};
type = types.nullOr (types.coercedTo types.str gatewayCoerce (types.submodule gatewayOpts));
description = ''

18
nixos/tests/networking/networkd-and-scripted.nix
View File

@@ -39,11 +39,23 @@ let
defaultGateway = {
address = "192.168.1.1";
interface = "enp1s0";
source = "192.168.1.3";
};
defaultGateway6 = {
address = "fd00:1234:5678:1::1";
interface = "enp1s0";
source = "fd00:1234:5678:1::3";
};
interfaces.enp1s0.ipv6.addresses = [
{
address = "fd00:1234:5678:1::2";
prefixLength = 64;
}
{
address = "fd00:1234:5678:1::3";
prefixLength = 128;
}
];
interfaces.enp1s0.ipv4.addresses = [
{
address = "192.168.1.2";
@@ -89,7 +101,11 @@ let
with subtest("Test default gateway"):
client.wait_until_succeeds("ping -c 1 192.168.3.1")
client.wait_until_succeeds("ping -c 1 fd00:1234:5678:3::1")
client.wait_until_succeeds("ping -c 1 fd00:1234:5678:1::1")
with subtest("Test default addresses"):
client.succeed("ip -4 route show default | grep -q 'src 192.168.1.3'")
client.succeed("ip -6 route show default | grep -q 'src fd00:1234:5678:1::3'")
'';
};
routeType = {