about summary refs log tree commit diff
path: root/modules/common/networking.nix
blob: 2867825f91efb48a13d03a71d5619f78b0beb41e (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
{
  config,
  lib,
  pkgs,
  this,
  ...
}:
with lib;
let
  cfg = config.nixfiles.modules.common.networking;
in
{
  options.nixfiles.modules.common.networking.onlyDefault = mkEnableOption "custom networking settings";

  config = mkIf (!cfg.onlyDefault) {
    ark.directories =
      with config.networking;
      optional networkmanager.enable "/etc/NetworkManager/system-connections"
      ++ optional wireless.iwd.enable "/var/lib/iwd";

    networking = mkMerge [
      {
        domain = my.domain.shire;

        hostName = this.hostname;
        hostId = substring 0 8 (builtins.hashString "md5" this.hostname);

        # Remove default hostname mappings. This is required at least by the
        # current implementation of the monitoring module.
        hosts = {
          "127.0.0.2" = mkForce [ ];
          "::1" = mkForce [ ];
        };

        nameservers = with my.configurations.manwe.wireguard; [
          ipv4.address
          ipv6.address
        ];

        useDHCP = false;

        nftables.enable = true;

        firewall = {
          enable = true;

          rejectPackets = false;

          allowPing = true;
          pingLimit = "1/minute burst 5 packets";

          logRefusedConnections = false;
          logRefusedPackets = false;
          logRefusedUnicastsOnly = false;
          logReversePathDrops = false;
        };
      }
      (
        let
          interface = "eth0"; # This assumes `usePredictableInterfaceNames` is false.
        in
        mkIf (hasAttr "ipv4" this && hasAttr "ipv6" this) {
          usePredictableInterfaceNames = false; # NOTE This can break something!
          interfaces.${interface} = {
            ipv4.addresses =
              with this.ipv4;
              optional (isString address && isInt prefixLength) { inherit address prefixLength; };

            ipv6.addresses =
              with this.ipv6;
              optional (isString address && isInt prefixLength) { inherit address prefixLength; };
          };
          defaultGateway =
            with this.ipv4;
            mkIf (isString gatewayAddress) {
              inherit interface;
              address = gatewayAddress;
            };
          defaultGateway6 =
            with this.ipv6;
            mkIf (isString gatewayAddress) {
              inherit interface;
              address = gatewayAddress;
            };
        }
      )
      (mkIf this.isHeadful {
        interfaces.eth0.useDHCP = mkDefault true;

        networkmanager = {
          enable = mkDefault true;
          unmanaged = [
            "bridge"
            "ethernet"
            "loopback"
            "wireguard"
          ];
          plugins = mkForce [ ];
          wifi.backend = "iwd";
        };

        wireless = {
          enable = false;
          iwd.enable = mkDefault true;
          userControlled.enable = true;
          allowAuxiliaryImperativeNetworks = true;
        };
      })
    ];

    environment = {
      shellAliases = listToAttrs (
        map ({ name, value }: nameValuePair name "${pkgs.iproute2}/bin/${value}") [
          {
            name = "bridge";
            value = "bridge -color=always";
          }
          {
            name = "ip";
            value = "ip -color=always";
          }
          {
            name = "tc";
            value = "tc -color=always";
          }
        ]
      );

      systemPackages = with pkgs; [
        ethtool
        myip
        nethogs
      ];
    };
  };
}

Consider giving Nix/NixOS a try! <3