summaryrefslogtreecommitdiff
path: root/custom/tinc/def.nix
blob: 8f3ec96952e2e4277ab234f804b5067031a773df (plain)
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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
{ config, lib, pkgs, ... }:

with lib;

let

  cfg = config.services.tinc;

in

{

  ###### interface

  options = {

    services.tinc = {

      networks = mkOption {
        default = { };
        type = types.loaOf types.optionSet;
        description = ''
          Defines the tinc networks which will be started.
          Each network invokes a different daemon.
        '';
        options = {

          extraConfig = mkOption {
            default = "";
            type = types.lines;
            description = ''
              Extra lines to add to the tinc service configuration file.
            '';
          };

          name = mkOption {
            default = null;
            type = types.nullOr types.str;
            description = ''
              The name of the node which is used as an identifier when communicating
              with the remote nodes in the mesh. If null then the hostname of the system
              is used.
            '';
          };

          debugLevel = mkOption {
            default = 0;
            type = types.addCheck types.int (l: l >= 0 && l <= 5);
            description = ''
              The amount of debugging information to add to the log. 0 means little
              logging while 5 is the most logging. <command>man tincd</command> for
              more details.
            '';
          };

          hosts = mkOption {
            default = { };
            type = types.loaOf types.lines;
            description = ''
              The name of the host in the network as well as the configuration for that host.
              This name should only contain alphanumerics and underscores.
            '';
          };

          interfaceType = mkOption {
            default = "tun";
            type = types.addCheck types.str (n: n == "tun" || n == "tap");
            description = ''
              The type of virtual interface used for the network connection
            '';
          };

          interfaceConfig = mkOption {
            default = { };
            description = ''
              Additional configuration for the generated network interface
            '';
          };

          package = mkOption {
            default = pkgs.tinc_pre;
            description = ''
              The package to use for the tinc daemon's binary.
            '';
          };

					scripts = mkOption {
					  default = { };
						type = types.loaOf (types.nullOr types.str);
						description = ''
						  Hook scripts
						'';
					};

        };
      };
    };

  };


  ###### implementation

  config = mkIf (cfg.networks != { }) {

    environment.etc = fold (a: b: a // b) { }
      (flip mapAttrsToList cfg.networks (network: data:
        flip mapAttrs' data.hosts (host: text: nameValuePair
          ("tinc/${network}/hosts/${host}")
          ({ inherit text; })
        ) // (flip mapAttrs' data.scripts (scriptName: text: nameValuePair
				  ("tinc/${network}/${scriptName}")
				  ({ mode = "0555"; inherit text; })
				)) // {
          "tinc/${network}/tinc.conf" = {
            text = ''
              Name = ${if data.name == null then "$HOST" else data.name}
              DeviceType = ${data.interfaceType}
              Device = /dev/net/tun
              Interface = tinc.${network}
              ${data.extraConfig}
            '';
          };
        }
      ));

    networking.interfaces = flip mapAttrs' cfg.networks (network: data: nameValuePair
      ("tinc.${network}")
      ({
        virtual = true;
        virtualType = "${data.interfaceType}";
      } // data.interfaceConfig)
    );

    systemd.services = flip mapAttrs' cfg.networks (network: data: nameValuePair
      ("tinc.${network}")
      ({
        description = "Tinc Daemon - ${network}";
        wantedBy = [ "network.target" ];
        after = [ "network-interfaces.target" ];
        path = [ data.package ];
        restartTriggers = [ config.environment.etc."tinc/${network}/tinc.conf".source ]
          ++ mapAttrsToList (host: _ : config.environment.etc."tinc/${network}/hosts/${host}".source) data.hosts;
        serviceConfig = {
          Type = "simple";
          PIDFile = "/run/tinc.${network}.pid";
        };
        preStart = ''
          ${pkgs.openresolv}/bin/resolvconf -d tinc.${network}

          mkdir -p /etc/tinc/${network}/hosts

          # Determine how we should generate our keys
          if type tinc >/dev/null 2>&1; then
            # Tinc 1.1+ uses the tinc helper application for key generation
            [ -f "/etc/tinc/${network}/ed25519_key.priv" ] || tinc -n ${network} generate-ed25519-keys || \
              [ -f "/etc/tinc/${network}/rsa_key.priv" ] || tinc -n ${network} generate-rsa-keys 4096
          else
            # Tinc 1.0 uses the tincd application
            [ -f "/etc/tinc/${network}/rsa_key.priv" ] || tincd -n ${network} -K 4096
          fi
        '';
        script = ''
          tincd -D -U tinc.${network} -n ${network} --pidfile /run/tinc.${network}.pid -d ${toString data.debugLevel}
        '';
      })
    );

    users.extraUsers = flip mapAttrs' cfg.networks (network: _:
      nameValuePair ("tinc.${network}") ({
        description = "Tinc daemon user for ${network}";
      })
    );

  };

}