630 lines
18 KiB
Nix
630 lines
18 KiB
Nix
{ config, options, lib, ... }:
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with lib;
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let
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# A host needs to know a network if it
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# - is a configured interface, or
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# - is required behind at least two different links
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getHostLinkNetworks = hostName: link:
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let
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hostConfig = config.site.hosts.${hostName};
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# all the host's links
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hostLinkNetworks = builtins.mapAttrs (link: _:
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networksBehindLink hostName link
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) hostConfig.links;
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# how many links have a net in networksBehindLink
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networkLinkCount = net:
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builtins.length (
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builtins.filter (builtins.elem net)
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(builtins.attrValues hostLinkNetworks)
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);
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in
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# access port
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if config.site.net ? ${link}
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then [ link ]
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# multiple vlans on this link
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else
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builtins.filter (net:
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# this port and local interface
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hostConfig.interfaces ? ${net}
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||
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# this port and another
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networkLinkCount net > 1
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) hostLinkNetworks.${link};
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networksBehindLink = hostName: name:
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networksBehindLink' {
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"${hostName}" = true;
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} [ name ];
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networksBehindLink' = seen: links:
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if links == []
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then
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# Done, result is the seen link names that are networks:
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builtins.filter (name:
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config.site.net ? ${name}
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) (builtins.attrNames seen)
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else
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let
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link = builtins.head links;
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seen' = seen // {
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"${link}" = true;
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};
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onlyUnseen = builtins.filter (link: ! seen' ? ${link});
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links' = builtins.tail links;
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in
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if config.site.hosts ? ${link}
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then networksBehindLink' seen' (
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links' ++ (
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builtins.attrNames config.site.hosts.${link}.interfaces
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) ++ (
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onlyUnseen (builtins.attrNames config.site.hosts.${link}.links)
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)
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)
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else if config.site.net ? ${link}
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then networksBehindLink' seen' links'
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else throw "Link to invalid target ${link}";
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dhcpOpts = {
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start = mkOption {
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description = "First IP address in pool";
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type = types.str;
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};
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end = mkOption {
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description = "Last IP address in pool";
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type = types.str;
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};
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time = mkOption {
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description = "Renew time in seconds";
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type = types.int;
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};
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max-time = mkOption {
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description = "Max renew time in seconds";
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type = types.int;
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};
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server = mkOption {
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description = "Container that runs the DHCP server";
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type = types.str;
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};
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router = mkOption {
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description = "Gateway";
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type = types.str;
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};
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fixed-hosts = mkOption {
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type = with types; attrsOf str;
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default = {};
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};
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};
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netOpts = { name, ... }: {
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options = {
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vlan = mkOption {
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description = "VLAN tag number";
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type = types.int;
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};
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subnet4 = mkOption {
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description = "v.w.x.y/z";
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type = with types; nullOr str;
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default = null;
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};
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subnet4Net = mkOption {
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type = with types; nullOr types.str;
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default =
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let
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inherit (config.site.net.${name}) subnet4;
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s = lib.splitString "/" subnet4;
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in
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if subnet4 != null && builtins.length s == 2
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then builtins.head s
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else null;
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description = "Don't set, use subnet4 instead!";
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};
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subnet4Len = mkOption {
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type = with types; nullOr types.int;
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default =
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let
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inherit (config.site.net.${name}) subnet4;
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s = lib.splitString "/" subnet4;
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in
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if subnet4 != null && builtins.length s == 2
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then lib.toInt (elemAt s 1)
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else null;
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description = "Don't set, use subnet4 instead!";
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};
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subnets6 = mkOption {
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description = "IPv6 subnets w/o prefixlen (always 64)";
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type = with types; attrsOf str;
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default = {};
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};
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hosts4 = mkOption {
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description = "Attribute set of hostnames to IPv4 addresses";
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type = with types; attrsOf str;
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default = {};
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};
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hosts6 = mkOption {
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description = "Attribute set of contexts to attribute sets of hostnames to IPv4 addresses";
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type = with types; attrsOf (attrsOf str);
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default = {};
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};
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ospf = {
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secret = mkOption {
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type = with types; nullOr str;
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default = null;
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};
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};
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dhcp = mkOption {
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type = with types; nullOr (submodule { options = dhcpOpts; });
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default = null;
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};
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domainName = mkOption {
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description = "Domain name option";
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type = types.str;
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default = "${name}.zentralwerk.org";
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};
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extraRecords = mkOption {
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type = with types; listOf (submodule {
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options = {
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name = mkOption {
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type = str;
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};
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type = mkOption {
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type = enum [ "A" "AAAA" "MX" "SRV" "CNAME" "TXT" ];
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};
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data = mkOption {
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type = str;
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};
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};
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});
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default = [];
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description = "Extraneous DNS records";
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};
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dynamicDomain = mkOption {
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type = types.bool;
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default = false;
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description = "Domain updated by DHCP server?";
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};
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};
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};
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upstreamOpts = {
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provider = mkOption {
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type = types.str;
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};
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link = mkOption {
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type = with types; nullOr str;
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default = null;
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description = "Underlying interface name for eg. PPPoE";
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};
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staticIpv4Address = mkOption {
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type = with types; nullOr str;
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default = null;
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};
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upBandwidth = mkOption {
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type = with types; nullOr int;
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default = null;
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};
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noNat.subnets6 = mkOption {
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type = with types; listOf str;
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default = [];
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description = "Do not NAT66 traffic from these public static subnets";
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};
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user = mkOption {
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type = with types; nullOr str;
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default = null;
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};
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password = mkOption {
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type = with types; nullOr str;
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default = null;
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};
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};
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interfaceOpts = { name, ... }: {
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options = {
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hwaddr = mkOption {
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type = with types; nullOr str;
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default = null;
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description = "Static MAC address";
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};
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type = mkOption {
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type = types.enum [ "phys" "veth" "pppoe" "bridge" "wireguard" ];
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description = ''
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veth: Virtual ethernet to be attached to a bridge.
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phys: (Physical) interface from a server moved into the
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container. Do not use with VLAN interfaces because they
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won't be moved back after lxc-stop.
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'';
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};
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gw4 = mkOption {
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type = with types; nullOr str;
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default = null;
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description = "IPv4 gateway";
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};
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gw6 = mkOption {
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type = with types; nullOr str;
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default = null;
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description = "IPv6 gateway";
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};
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upstream = mkOption {
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type = with types; nullOr (submodule { options = upstreamOpts; });
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default = null;
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description = "Upstream interface configuration";
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};
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wireguard = mkOption {
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default = null;
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type = with types; nullOr (submodule {
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options = {
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endpoint = mkOption {
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type = str;
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};
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publicKey = mkOption {
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type = str;
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};
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privateKey = mkOption {
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type = str;
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};
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addresses = mkOption {
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type = listOf str;
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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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hostOpts = { name, ... }: {
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options = {
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prebuilt = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Include the container system in the server's `build-container` script.
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'';
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};
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firstboot = mkOption {
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type = types.bool;
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default = false;
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description = ''
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true if host is a newly flashed OpenWRT device with a default address
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'';
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};
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role = mkOption {
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type = types.enum [ "ap" "switch" "server" "container" "client" ];
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default = "client";
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};
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model = mkOption {
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type = types.str;
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default = {
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ap = "unknown";
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switch = "unknown";
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server = "pc";
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container = "lxc";
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client = "any";
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}."${config.site.hosts.${name}.role}";
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};
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password = mkOption {
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type = with types; nullOr str;
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default = null;
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};
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location = mkOption {
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type = with types; nullOr str;
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default = null;
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};
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interfaces = mkOption {
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default = {};
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type = with types; attrsOf (submodule interfaceOpts);
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description = "Network interfaces";
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};
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physicalInterfaces = mkOption {
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default = lib.filterAttrs (_: { type, ... }:
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builtins.elem type [ "phys" "veth" ]
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) config.site.hosts.${name}.interfaces;
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type = with types; attrsOf (submodule interfaceOpts);
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description = "Network interfaces that are not virtual (don't set!)";
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};
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isRouter = mkOption {
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type = types.bool;
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# isRouter = Part of the core network?
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default =
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config.site.hosts.${name}.interfaces ? core &&
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config.site.net.core.hosts4 ? ${name};
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description = "Should this host route?";
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};
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firewall.enable = mkOption {
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type = types.bool;
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default = false;
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description = "Enable firewall to disallow incoming connections from core";
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};
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forwardPorts = mkOption {
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type = with types; listOf (submodule { options = {
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proto = mkOption {
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type = types.enum [ "tcp" "udp" ];
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};
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sourcePort = mkOption {
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type = types.int;
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};
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destination = mkOption {
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type = types.str;
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};
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reflect = mkOption {
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type = types.bool;
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default = true;
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description = ''
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Enable NAT reflection
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Any forwarded connection will have our static IPv4
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address as source so that forwarded services become
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available internally.
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Unfortunately, this breaks identification by IPv4
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adress.
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'';
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};
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}; });
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default = [];
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};
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ospf.stubNets4 = mkOption {
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type = with types; listOf str;
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default = [];
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description = "Additional IPv4 networks to announce";
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};
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ospf.stubNets6 = mkOption {
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type = with types; listOf str;
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default = [];
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description = "Additional IPv6 networks to announce";
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};
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ospf.allowedUpstreams = mkOption {
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type = with types; listOf str;
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default = [];
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description = "Accept default routes from these OSPF routers, in order of preference";
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};
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ospf.upstreamInstance = mkOption {
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type = with types; nullOr int;
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default = null;
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description = "OSPF instance for advertising the default route";
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};
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bgp = mkOption {
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default = null;
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type = with types; nullOr (submodule {
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options = bgpOpts;
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});
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};
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services.dns = {
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enable = mkOption {
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type = types.bool;
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default = false;
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};
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};
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services.dnscache.enable = mkOption {
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type = types.bool;
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default = false;
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};
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services.yggdrasil = {
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enable = mkOption {
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type = types.bool;
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default = false;
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};
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keys = mkOption {
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type = types.str;
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default = "";
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};
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};
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links = mkOption {
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description = "Which port is connected to what other device? Keys are either network names or known hostnames.";
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default = {};
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type = with types; attrsOf (submodule (linkOpts name));
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};
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wifi = mkOption {
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default = {};
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type = with types; attrsOf (submodule (
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{ name, ... }: {
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options = {
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htmode = mkOption {
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type = enum [ "HT20" "HT40-" "HT40+" "VHT80" ];
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};
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channel = mkOption {
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type = int;
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};
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ssids = mkOption {
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type = attrsOf (submodule (
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{ name, ... }: {
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options = {
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net = mkOption {
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type = str;
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};
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psk = mkOption {
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type = nullOr str;
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default = null;
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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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}
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));
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};
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};
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};
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bgpOpts = {
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asn = mkOption {
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type = types.int;
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};
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peers = mkOption {
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type = with types; attrsOf (submodule ({ name, ... }: {
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options = {
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asn = mkOption {
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type = types.int;
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};
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};
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}));
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default = {};
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};
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};
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linkOpts = hostName: { name, ... }: {
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options = {
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ports = mkOption {
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type = with types; listOf str;
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description = "Port names";
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};
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group = mkOption {
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type = with types; nullOr str;
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default = null;
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description = "Link aggregation group with a fixed number";
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};
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nets = mkOption {
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type = with types; listOf str;
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description = "Automatically generated";
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default = getHostLinkNetworks hostName name;
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};
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vlans = mkOption {
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type = with types; listOf int;
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description = "Automatically generated, do not set";
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default = map (net:
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config.site.net.${net}.vlan
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) config.site.hosts.${hostName}.links.${name}.nets;
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};
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trunk = mkOption {
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type = types.bool;
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description = "Trunk with tagged VLANs?";
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default =
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if config.site.net ? ${name}
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then false
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else if config.site.hosts ? ${name}
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then true
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else throw "Invalid link target: \"${name}\"";
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};
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};
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};
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in
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{
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options.site = {
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net = mkOption {
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description = "All subnets";
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default = {};
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type = with types; attrsOf (submodule netOpts);
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};
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hosts = mkOption {
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description = "All the static hosts";
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default = {};
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type = with types; attrsOf (submodule hostOpts);
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};
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sshPubKeys = mkOption {
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type = with types; listOf str;
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};
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dyndnsKey = mkOption {
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type = types.str;
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};
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};
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config.warnings =
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let
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findCollisions = getter: xs:
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(builtins.foldl' ({ known, dup }: k:
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let
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ks = builtins.toString k;
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in
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if known ? ${ks}
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then { inherit known; dup = dup ++ [ks]; }
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else { known = known // { ${ks} = true; }; inherit dup; }
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) {
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known = {}; dup = [];
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} (
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concatMap getter (builtins.attrValues xs)
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)).dup;
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reportCollisions = name: getter: xs:
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map (k: "Duplicate ${name}: ${k}") (findCollisions getter xs);
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ospfUpstreamXorGw =
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builtins.concatMap (hostName:
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let
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hostConf = config.site.hosts.${hostName};
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gwNets = builtins.filter (netName:
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hostConf.interfaces.${netName}.gw4 != null
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) (builtins.attrNames hostConf.interfaces);
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in if gwNets != [] && hostConf.ospf.allowedUpstreams != []
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then [ ''
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Host ${hostName} has gateway on ${builtins.head gwNets} but accepts default routes from OSPF
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'' ]
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else []
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) (builtins.attrNames config.site.hosts);
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in
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(reportCollisions "VLAN tag" (x: [x.vlan]) config.site.net) ++
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(reportCollisions "IPv4 subnet" (x: if x.subnet4 == null then [] else [x.subnet4]) config.site.net) ++
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(reportCollisions "IPv6 subnet" (x: builtins.attrValues x.subnets6) config.site.net) ++
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ospfUpstreamXorGw;
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config.assertions =
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# Duplicate host/net name check
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map (name: {
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assertion = ! config.site.net ? ${name};
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message = "Host \"${name}\" must be named differently if net \"${name}\" exists.";
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}) (builtins.attrNames config.site.hosts)
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++
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# Duplicate address check
|
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(let
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addrHosts =
|
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builtins.foldl' (result: { hosts4, ... }:
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builtins.foldl' (result: host:
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let
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addr = hosts4.${host};
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in
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if result ? ${addr}
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then result // {
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"${addr}" = result.${addr} ++ [ host ];
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}
|
|
else result // {
|
|
"${addr}" = [ host ];
|
|
}
|
|
) result (builtins.attrNames hosts4)
|
|
) {} (builtins.attrValues config.site.net)
|
|
//
|
|
builtins.foldl' (result: net:
|
|
builtins.foldl' (result: ctx:
|
|
builtins.foldl' (result: host:
|
|
let
|
|
addr = config.site.net.${net}.hosts6.${ctx}.${host};
|
|
in
|
|
if result ? ${addr}
|
|
then result // {
|
|
"${addr}" = result.${addr} ++ [ host ];
|
|
}
|
|
else result // {
|
|
"${addr}" = [ host ];
|
|
}
|
|
) result (builtins.attrNames config.site.net.${net}.hosts6.${ctx})
|
|
) result (builtins.attrNames config.site.net.${net}.hosts6)
|
|
) {} (builtins.attrNames config.site.net);
|
|
in map (addr: {
|
|
assertion = builtins.length addrHosts.${addr} == 1;
|
|
message = "Address ${addr} is assigned to more than one host: ${lib.concatStringsSep " " addrHosts.${addr}}";
|
|
}) (builtins.attrNames addrHosts))
|
|
++
|
|
# duplicate vlan check
|
|
(let
|
|
vlanNets =
|
|
builtins.foldl' (result: net:
|
|
let
|
|
vlan = toString config.site.net.${net}.vlan;
|
|
in
|
|
if result ? ${vlan}
|
|
then result // {
|
|
"${vlan}" = result.${vlan} ++ [ net ];
|
|
}
|
|
else result // {
|
|
"${vlan}" = [ net ];
|
|
}
|
|
) {} (builtins.attrNames config.site.net);
|
|
in map (vlan: {
|
|
assertion = builtins.length vlanNets.${vlan} == 1;
|
|
message = "VLAN ${vlan} is used by more than one network: ${lib.concatStringsSep " " vlanNets.${vlan}}";
|
|
}) (builtins.attrNames vlanNets));
|
|
}
|