mirror of
https://github.com/oddlama/nixos-extra-modules.git
synced 2025-10-10 22:00:39 +02:00
chore: remove external peers from wireguard module
This commit is contained in:
oddlama
parent
2502ff50ab
commit
0660c722cf
2 changed files with 278 additions and 361 deletions
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@ -7,11 +7,8 @@
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inherit
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(lib)
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any
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attrNames
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attrValues
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concatAttrs
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concatMap
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concatMapStrings
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concatStringsSep
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duplicates
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filter
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@ -36,8 +33,6 @@
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configForNetwork = wgName: wgCfg: let
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inherit
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(lib.wireguard.getNetwork inputs wgName)
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externalPeerName
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externalPeerNamesRaw
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networkCidrs
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participatingClientNodes
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participatingNodes
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@ -57,9 +52,9 @@
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filterSelf = filter (x: x != nodeName);
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# All nodes that use our node as the via into the wireguard network
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ourClientNodes =
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optionals isServer
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(filter (n: (wgCfgOf n).client.via == nodeName) participatingClientNodes);
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ourClientNodes = optionals isServer (
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filter (n: (wgCfgOf n).client.via == nodeName) participatingClientNodes
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);
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# The list of peers for which we have to know the psk.
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neededPeers =
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@ -67,15 +62,11 @@
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then
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# Other servers in the same network
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filterSelf participatingServerNodes
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# Our external peers
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++ map externalPeerName (attrNames wgCfg.server.externalPeers)
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# Our clients
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++ ourClientNodes
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else [wgCfg.client.via];
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# Figure out if there are duplicate peers or addresses so we can
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# make an assertion later.
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duplicatePeers = duplicates externalPeerNamesRaw;
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# Figure out if there are duplicate addresses so we can make an assertion later.
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duplicateAddrs = duplicates usedAddresses;
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# Adds context information to the assertions for this network
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@ -93,10 +84,10 @@
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map (net.cidr.make 128) (
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# The server accepts traffic to it's own address
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snCfg.addresses
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# plus traffic for any of its external peers
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++ attrValues snCfg.server.externalPeers
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# plus traffic for any client that is connected via that server
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++ concatMap (n: (wgCfgOf n).addresses) (filter (n: (wgCfgOf n).client.via == serverNode) participatingClientNodes)
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++ concatMap (n: (wgCfgOf n).addresses) (
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filter (n: (wgCfgOf n).client.via == serverNode) participatingClientNodes
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)
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);
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in {
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assertions = [
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@ -104,10 +95,6 @@
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assertion = any (n: (wgCfgOf n).server.host != null) participatingNodes;
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message = "${assertionPrefix}: At least one node in a network must be a server.";
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}
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{
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assertion = duplicatePeers == [];
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message = "${assertionPrefix}: Multiple definitions for external peer(s):${concatMapStrings (x: " '${x}'") duplicatePeers}";
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}
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{
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assertion = duplicateAddrs == [];
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message = "${assertionPrefix}: Addresses used multiple times: ${concatStringsSep ", " duplicateAddrs}";
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@ -127,7 +114,9 @@
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];
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# Open the udp port for the wireguard endpoint in the firewall
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networking.firewall.allowedUDPPorts = mkIf (isServer && wgCfg.server.openFirewall) [wgCfg.server.port];
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networking.firewall.allowedUDPPorts = mkIf (isServer && wgCfg.server.openFirewall) [
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wgCfg.server.port
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];
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# If requested, create firewall rules for the network / specific participants and open ports.
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networking.nftables.firewall = let
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@ -138,17 +127,19 @@
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# Parent zone for the whole interface
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"wg-${wgCfg.linkName}".interfaces = [wgCfg.linkName];
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}
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// listToAttrs (flip map participatingNodes (
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peer: let
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peerCfg = wgCfgOf peer;
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in
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# Subzone to specifically target the peer
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nameValuePair "wg-${wgCfg.linkName}-node-${peer}" {
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parent = "wg-${wgCfg.linkName}";
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ipv4Addresses = [peerCfg.ipv4];
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ipv6Addresses = [peerCfg.ipv6];
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}
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));
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// listToAttrs (
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flip map participatingNodes (
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peer: let
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peerCfg = wgCfgOf peer;
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in
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# Subzone to specifically target the peer
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nameValuePair "wg-${wgCfg.linkName}-node-${peer}" {
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parent = "wg-${wgCfg.linkName}";
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ipv4Addresses = [peerCfg.ipv4];
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ipv6Addresses = [peerCfg.ipv6];
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}
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)
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);
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rules =
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{
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@ -166,34 +157,37 @@
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};
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}
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# Open ports for specific nodes network
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// listToAttrs (flip map participatingNodes (
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peer:
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nameValuePair "wg-${wgCfg.linkName}-node-${peer}-to-${localZoneName}" (
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mkIf (wgCfg.firewallRuleForNode ? ${peer}) {
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from = ["wg-${wgCfg.linkName}-node-${peer}"];
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to = [localZoneName];
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ignoreEmptyRule = true;
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// listToAttrs (
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flip map participatingNodes (
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peer:
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nameValuePair "wg-${wgCfg.linkName}-node-${peer}-to-${localZoneName}" (
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mkIf (wgCfg.firewallRuleForNode ? ${peer}) {
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from = ["wg-${wgCfg.linkName}-node-${peer}"];
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to = [localZoneName];
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ignoreEmptyRule = true;
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inherit
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(wgCfg.firewallRuleForNode.${peer})
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allowedTCPPorts
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allowedUDPPorts
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;
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}
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)
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));
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inherit
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(wgCfg.firewallRuleForNode.${peer})
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allowedTCPPorts
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allowedUDPPorts
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;
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}
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)
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)
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);
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};
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age.secrets =
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concatAttrs (map
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(other: {
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concatAttrs (
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map (other: {
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${peerPresharedKeySecret nodeName other} = {
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rekeyFile = peerPresharedKeyPath nodeName other;
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owner = "systemd-network";
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generator.script = {pkgs, ...}: "${pkgs.wireguard-tools}/bin/wg genpsk";
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};
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})
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neededPeers)
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neededPeers
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)
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// {
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${peerPrivateKeySecret nodeName} = {
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rekeyFile = peerPrivateKeyPath nodeName;
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@ -204,7 +198,9 @@
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...
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}: ''
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priv=$(${pkgs.wireguard-tools}/bin/wg genkey)
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${pkgs.wireguard-tools}/bin/wg pubkey <<< "$priv" > ${lib.escapeShellArg (lib.removeSuffix ".age" file + ".pub")}
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${pkgs.wireguard-tools}/bin/wg pubkey <<< "$priv" > ${
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lib.escapeShellArg (lib.removeSuffix ".age" file + ".pub")
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}
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echo "$priv"
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'';
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};
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@ -227,34 +223,26 @@
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if isServer
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then
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# Always include all other server nodes.
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map (serverNode: let
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snCfg = wgCfgOf serverNode;
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in {
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PublicKey = builtins.readFile (peerPublicKeyPath serverNode);
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PresharedKeyFile = config.age.secrets.${peerPresharedKeySecret nodeName serverNode}.path;
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AllowedIPs = serverAllowedIPs serverNode;
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Endpoint = "${snCfg.server.host}:${toString snCfg.server.port}";
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})
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(filterSelf participatingServerNodes)
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# All our external peers
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++ mapAttrsToList (extPeer: ips: let
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peerName = externalPeerName extPeer;
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in {
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PublicKey = builtins.readFile (peerPublicKeyPath peerName);
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PresharedKeyFile = config.age.secrets.${peerPresharedKeySecret nodeName peerName}.path;
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AllowedIPs = map (net.cidr.make 128) ips;
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# Connections to external peers should always be kept alive
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PersistentKeepalive = 25;
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})
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wgCfg.server.externalPeers
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map (
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serverNode: let
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snCfg = wgCfgOf serverNode;
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in {
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PublicKey = builtins.readFile (peerPublicKeyPath serverNode);
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PresharedKeyFile = config.age.secrets.${peerPresharedKeySecret nodeName serverNode}.path;
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AllowedIPs = serverAllowedIPs serverNode;
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Endpoint = "${snCfg.server.host}:${toString snCfg.server.port}";
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}
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) (filterSelf participatingServerNodes)
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# All client nodes that have their via set to us.
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++ map (clientNode: let
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clientCfg = wgCfgOf clientNode;
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in {
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PublicKey = builtins.readFile (peerPublicKeyPath clientNode);
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PresharedKeyFile = config.age.secrets.${peerPresharedKeySecret nodeName clientNode}.path;
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AllowedIPs = map (net.cidr.make 128) clientCfg.addresses;
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})
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++ map (
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clientNode: let
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clientCfg = wgCfgOf clientNode;
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in {
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PublicKey = builtins.readFile (peerPublicKeyPath clientNode);
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PresharedKeyFile = config.age.secrets.${peerPresharedKeySecret nodeName clientNode}.path;
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AllowedIPs = map (net.cidr.make 128) clientCfg.addresses;
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}
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)
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ourClientNodes
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else
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# We are a client node, so only include our via server.
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@ -286,189 +274,184 @@ in {
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options.wireguard = mkOption {
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default = {};
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description = "Configures wireguard networks via systemd-networkd.";
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type = types.lazyAttrsOf (types.submodule ({
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config,
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name,
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options,
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...
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}: {
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options = {
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server = {
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host = mkOption {
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default = null;
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type = types.nullOr types.str;
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description = "The hostname or ip address which other peers can use to reach this host. No server functionality will be activated if set to null.";
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};
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port = mkOption {
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default = 51820;
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type = types.port;
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description = "The port to listen on.";
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};
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openFirewall = mkOption {
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default = false;
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type = types.bool;
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description = "Whether to open the firewall for the specified {option}`port`.";
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};
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externalPeers = mkOption {
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type = types.attrsOf (types.listOf (types.net.ip-in config.addresses));
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default = {};
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example = {my-android-phone = ["10.0.0.97"];};
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description = ''
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Allows defining an extra set of peers that should be added to this wireguard network,
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but will not be managed by this flake. (e.g. phones)
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These external peers will only know this node as a peer, which will forward
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their traffic to other members of the network if required. This requires
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this node to act as a server.
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'';
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};
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reservedAddresses = mkOption {
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type = types.listOf types.net.cidr;
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default = [];
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example = ["10.0.0.0/24" "fd00:cafe::/64"];
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description = ''
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Allows defining extra CIDR network ranges that shall be reserved for this network.
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Reservation means that those address spaces will be guaranteed to be included in
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the spanned network, but no rules will be enforced as to who in the network may use them.
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By default, this module will try to allocate the smallest address space that includes
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all network peers. If you know that there might be additional external peers added later,
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it may be beneficial to reserve a bigger address space from the start to avoid having
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to update existing external peers when the generated address space expands.
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'';
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};
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};
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client = {
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via = mkOption {
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default = null;
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type = types.nullOr types.str;
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description = ''
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The server node via which to connect to the network.
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No client functionality will be activated if set to null.
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'';
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};
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keepalive = mkOption {
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default = true;
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type = types.bool;
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description = "Whether to keep this connection alive using PersistentKeepalive. Set to false only for networks where client and server IPs are stable.";
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};
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};
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priority = mkOption {
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default = 40;
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type = types.int;
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description = "The order priority used when creating systemd netdev and network files.";
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};
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linkName = mkOption {
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default = name;
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type = types.str;
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description = "The name for the created network interface.";
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};
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unitConfName = mkOption {
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default = "${toString config.priority}-${config.linkName}";
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readOnly = true;
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type = types.str;
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description = ''
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The name used for unit configuration files. This is a read-only option.
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Access this if you want to add additional settings to the generated systemd units.
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'';
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};
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ipv4 = mkOption {
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type = types.lazyOf types.net.ipv4;
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default = types.lazyValue (lib.wireguard.getNetwork inputs name).assignedIpv4Addresses.${nodeName};
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description = ''
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The ipv4 address for this machine. If you do not set this explicitly,
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a semi-stable ipv4 address will be derived automatically based on the
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hostname of this machine. At least one participating server must reserve
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a big-enough space of addresses by setting `reservedAddresses`.
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See `net.cidr.assignIps` for more information on the algorithm.
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'';
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};
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ipv6 = mkOption {
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type = types.lazyOf types.net.ipv6;
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default = types.lazyValue (lib.wireguard.getNetwork inputs name).assignedIpv6Addresses.${nodeName};
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description = ''
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The ipv6 address for this machine. If you do not set this explicitly,
|
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a semi-stable ipv6 address will be derived automatically based on the
|
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hostname of this machine. At least one participating server must reserve
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a big-enough space of addresses by setting `reservedAddresses`.
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See `net.cidr.assignIps` for more information on the algorithm.
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'';
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};
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addresses = mkOption {
|
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type = types.listOf (types.lazyOf types.net.ip);
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default = [
|
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(head options.ipv4.definitions)
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(head options.ipv6.definitions)
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];
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description = ''
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The ip addresses (v4 and/or v6) to use for this machine.
|
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The actual network cidr will automatically be derived from all network participants.
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By default this will just include {option}`ipv4` and {option}`ipv6` as configured.
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'';
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};
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|
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firewallRuleForAll = mkOption {
|
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default = {};
|
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description = ''
|
||||
Allows you to set specific firewall rules for traffic originating from any participant in this
|
||||
wireguard network. A corresponding rule `wg-<network-name>-to-<local-zone-name>` will be created to easily expose
|
||||
services to the network.
|
||||
'';
|
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type = types.submodule {
|
||||
options = {
|
||||
allowedTCPPorts = mkOption {
|
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type = types.listOf types.port;
|
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default = [];
|
||||
description = "Convenience option to open specific TCP ports for traffic from the network.";
|
||||
type = types.lazyAttrsOf (
|
||||
types.submodule (
|
||||
{
|
||||
config,
|
||||
name,
|
||||
options,
|
||||
...
|
||||
}: {
|
||||
options = {
|
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server = {
|
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host = mkOption {
|
||||
default = null;
|
||||
type = types.nullOr types.str;
|
||||
description = "The hostname or ip address which other peers can use to reach this host. No server functionality will be activated if set to null.";
|
||||
};
|
||||
allowedUDPPorts = mkOption {
|
||||
type = types.listOf types.port;
|
||||
|
||||
port = mkOption {
|
||||
default = 51820;
|
||||
type = types.port;
|
||||
description = "The port to listen on.";
|
||||
};
|
||||
|
||||
openFirewall = mkOption {
|
||||
default = false;
|
||||
type = types.bool;
|
||||
description = "Whether to open the firewall for the specified {option}`port`.";
|
||||
};
|
||||
|
||||
reservedAddresses = mkOption {
|
||||
type = types.listOf types.net.cidr;
|
||||
default = [];
|
||||
description = "Convenience option to open specific UDP ports for traffic from the network.";
|
||||
example = [
|
||||
"10.0.0.0/24"
|
||||
"fd00:cafe::/64"
|
||||
];
|
||||
description = ''
|
||||
Allows defining extra CIDR network ranges that shall be reserved for this network.
|
||||
Reservation means that those address spaces will be guaranteed to be included in
|
||||
the spanned network, but no rules will be enforced as to who in the network may use them.
|
||||
|
||||
By default, this module will try to allocate the smallest address space that includes
|
||||
all network peers.
|
||||
'';
|
||||
};
|
||||
};
|
||||
};
|
||||
};
|
||||
|
||||
firewallRuleForNode = mkOption {
|
||||
default = {};
|
||||
description = ''
|
||||
Allows you to set specific firewall rules just for traffic originating from another network node.
|
||||
A corresponding rule `wg-<network-name>-node-<node-name>-to-<local-zone-name>` will be created to easily expose
|
||||
services to that node.
|
||||
'';
|
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type = types.attrsOf (types.submodule {
|
||||
options = {
|
||||
allowedTCPPorts = mkOption {
|
||||
type = types.listOf types.port;
|
||||
default = [];
|
||||
description = "Convenience option to open specific TCP ports for traffic from another node.";
|
||||
client = {
|
||||
via = mkOption {
|
||||
default = null;
|
||||
type = types.nullOr types.str;
|
||||
description = ''
|
||||
The server node via which to connect to the network.
|
||||
No client functionality will be activated if set to null.
|
||||
'';
|
||||
};
|
||||
allowedUDPPorts = mkOption {
|
||||
type = types.listOf types.port;
|
||||
default = [];
|
||||
description = "Convenience option to open specific UDP ports for traffic from another node.";
|
||||
|
||||
keepalive = mkOption {
|
||||
default = true;
|
||||
type = types.bool;
|
||||
description = "Whether to keep this connection alive using PersistentKeepalive. Set to false only for networks where client and server IPs are stable.";
|
||||
};
|
||||
};
|
||||
});
|
||||
};
|
||||
};
|
||||
}));
|
||||
|
||||
priority = mkOption {
|
||||
default = 40;
|
||||
type = types.int;
|
||||
description = "The order priority used when creating systemd netdev and network files.";
|
||||
};
|
||||
|
||||
linkName = mkOption {
|
||||
default = name;
|
||||
type = types.str;
|
||||
description = "The name for the created network interface.";
|
||||
};
|
||||
|
||||
unitConfName = mkOption {
|
||||
default = "${toString config.priority}-${config.linkName}";
|
||||
readOnly = true;
|
||||
type = types.str;
|
||||
description = ''
|
||||
The name used for unit configuration files. This is a read-only option.
|
||||
Access this if you want to add additional settings to the generated systemd units.
|
||||
'';
|
||||
};
|
||||
|
||||
ipv4 = mkOption {
|
||||
type = types.lazyOf types.net.ipv4;
|
||||
default = types.lazyValue (lib.wireguard.getNetwork inputs name).assignedIpv4Addresses.${nodeName};
|
||||
description = ''
|
||||
The ipv4 address for this machine. If you do not set this explicitly,
|
||||
a semi-stable ipv4 address will be derived automatically based on the
|
||||
hostname of this machine. At least one participating server must reserve
|
||||
a big-enough space of addresses by setting `reservedAddresses`.
|
||||
See `net.cidr.assignIps` for more information on the algorithm.
|
||||
'';
|
||||
};
|
||||
|
||||
ipv6 = mkOption {
|
||||
type = types.lazyOf types.net.ipv6;
|
||||
default = types.lazyValue (lib.wireguard.getNetwork inputs name).assignedIpv6Addresses.${nodeName};
|
||||
description = ''
|
||||
The ipv6 address for this machine. If you do not set this explicitly,
|
||||
a semi-stable ipv6 address will be derived automatically based on the
|
||||
hostname of this machine. At least one participating server must reserve
|
||||
a big-enough space of addresses by setting `reservedAddresses`.
|
||||
See `net.cidr.assignIps` for more information on the algorithm.
|
||||
'';
|
||||
};
|
||||
|
||||
addresses = mkOption {
|
||||
type = types.listOf (types.lazyOf types.net.ip);
|
||||
default = [
|
||||
(head options.ipv4.definitions)
|
||||
(head options.ipv6.definitions)
|
||||
];
|
||||
description = ''
|
||||
The ip addresses (v4 and/or v6) to use for this machine.
|
||||
The actual network cidr will automatically be derived from all network participants.
|
||||
By default this will just include {option}`ipv4` and {option}`ipv6` as configured.
|
||||
'';
|
||||
};
|
||||
|
||||
firewallRuleForAll = mkOption {
|
||||
default = {};
|
||||
description = ''
|
||||
Allows you to set specific firewall rules for traffic originating from any participant in this
|
||||
wireguard network. A corresponding rule `wg-<network-name>-to-<local-zone-name>` will be created to easily expose
|
||||
services to the network.
|
||||
'';
|
||||
type = types.submodule {
|
||||
options = {
|
||||
allowedTCPPorts = mkOption {
|
||||
type = types.listOf types.port;
|
||||
default = [];
|
||||
description = "Convenience option to open specific TCP ports for traffic from the network.";
|
||||
};
|
||||
allowedUDPPorts = mkOption {
|
||||
type = types.listOf types.port;
|
||||
default = [];
|
||||
description = "Convenience option to open specific UDP ports for traffic from the network.";
|
||||
};
|
||||
};
|
||||
};
|
||||
};
|
||||
|
||||
firewallRuleForNode = mkOption {
|
||||
default = {};
|
||||
description = ''
|
||||
Allows you to set specific firewall rules just for traffic originating from another network node.
|
||||
A corresponding rule `wg-<network-name>-node-<node-name>-to-<local-zone-name>` will be created to easily expose
|
||||
services to that node.
|
||||
'';
|
||||
type = types.attrsOf (
|
||||
types.submodule {
|
||||
options = {
|
||||
allowedTCPPorts = mkOption {
|
||||
type = types.listOf types.port;
|
||||
default = [];
|
||||
description = "Convenience option to open specific TCP ports for traffic from another node.";
|
||||
};
|
||||
allowedUDPPorts = mkOption {
|
||||
type = types.listOf types.port;
|
||||
default = [];
|
||||
description = "Convenience option to open specific UDP ports for traffic from another node.";
|
||||
};
|
||||
};
|
||||
}
|
||||
);
|
||||
};
|
||||
};
|
||||
}
|
||||
)
|
||||
);
|
||||
};
|
||||
|
||||
config = mkIf (cfg != {}) (mergeToplevelConfigs
|
||||
["assertions" "age" "networking" "systemd"]
|
||||
(mapAttrsToList configForNetwork cfg));
|
||||
config = mkIf (cfg != {}) (
|
||||
mergeToplevelConfigs ["assertions" "age" "networking" "systemd"] (
|
||||
mapAttrsToList configForNetwork cfg
|
||||
)
|
||||
);
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue