sys/net/options.nix


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

{ config, lib, ... }:
with lib; {
  options.local.nets = with lib.types; mkOption {
    readOnly = true;

    type = attrsOf (submodule ({ config, ... }: {
      options =
        let
          v4config = config.v4;
          v6config = config.v6;
        in
        {
          hosts = mkOption {
            default = { };

            type = attrsOf (submodule {
              options = {
                v4 = mkOption {
                  default = null;

                  type = nullOr (submodule ({ config, ... }: {
                    options = {
                      suffix = mkOption {
                        type = str;
                      };

                      address = mkOption {
                        type = str;
                        readOnly = true;
                      };

                      cidr = mkOption {
                        type = str;
                        readOnly = true;
                      };

                      single = mkOption {
                        type = str;
                        readOnly = true;
                      };
                    };

                    config = {
                      address =
                        if v4config.bits == 0
                        then config.suffix
                        else if v4config.bits == 32
                        then v4config.subnet
                        else "${v4config.prefix}.${config.suffix}";

                      cidr = "${config.address}/${toString v4config.bits}";
                      single = "${config.address}/32";
                    };
                  }));
                };

                v6 = mkOption {
                  default = null;

                  type = nullOr (submodule ({ config, ... }: {
                    options = {
                      suffix = mkOption {
                        type = str;
                      };

                      address = mkOption {
                        type = str;
                        readOnly = true;
                      };

                      cidr = mkOption {
                        type = str;
                        readOnly = true;
                      };

                      single = mkOption {
                        type = str;
                        readOnly = true;
                      };
                    };

                    config = {
                      address =
                        let
                          hextets = fragment: length (splitString ":" fragment);
                          separator = if doubleColon then "::" else ":";
                          doubleColon = hextets v6config.prefix + hextets config.suffix < 8;

                          joined =
                            if v6config.bits != 0
                            then "${v6config.prefix}${separator}${config.suffix}"
                            else config.suffix;
                        in
                        joined;

                      cidr = "${config.address}/${toString v6config.bits}";
                      single = "${config.address}/128";
                    };
                  }));
                };
              };
            });
          };

          v4 = mkOption {
            default = null;

            type = nullOr (submodule ({ config, ... }: {
              options = {
                bits = mkOption {
                  type = enum [ 0 8 16 24 32 ];
                };

                prefix = mkOption {
                  type = str;
                };

                subnet = mkOption {
                  type = str;
                  readOnly = true;
                };

                cidr = mkOption {
                  type = str;
                  readOnly = true;
                };
              };

              config = {
                cidr = "${config.subnet}/${toString config.bits}";
                subnet =
                  if config.bits != 0
                  then config.prefix + strings.replicate (4 - config.bits / 8) ".0"
                  else "0.0.0.0";
              };
            }));
          };

          v6 = mkOption {
            default = null;

            type = nullOr (submodule ({ config, ... }: {
              options = {
                bits = mkOption {
                  type = addCheck (ints.between 0 64) (b: mod b 4 == 0) // {
                    description = "IPv6 subnet bits at nibble boundary";
                  };
                };

                prefix = mkOption {
                  type = str;
                };

                subnet = mkOption {
                  type = str;
                  readOnly = true;
                };

                cidr = mkOption {
                  type = str;
                  readOnly = true;
                };
              };

              config = {
                cidr = "${config.subnet}/${toString config.bits}";
                subnet = "${config.prefix}::";
              };
            }));
          };
        };
    }));
  };
}