blob: bec5d7b8107e3448b7391fc568ee360042317abd (
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
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
|
{ config, pkgs, ... }:
with pkgs.lib;
let
cfg = config.services.openvpn;
inherit (pkgs) openvpn;
PATH = "${pkgs.iptables}/sbin:${pkgs.coreutils}/bin:${pkgs.iproute}/sbin:${pkgs.nettools}/sbin";
makeOpenVPNJob = cfg : name:
let
upScript = ''
#!/bin/sh
exec &> /var/log/openvpn-${name}-up
PATH=${PATH}
${cfg.up}
'';
downScript = ''
#!/bin/sh
exec &> /var/log/openvpn-${name}-down
PATH=${PATH}
${cfg.down}
'';
configFile = pkgs.writeText "openvpn-config-${name}"
''
${if cfg.up != "" || cfg.down != "" then "script-security 2" else ""}
${cfg.config}
${if cfg.up != "" then "up ${pkgs.writeScript "openvpn-${name}-up" upScript}" else "" }
${if cfg.down != "" then "down ${pkgs.writeScript "openvpn-${name}-down" downScript}" else "" }
'';
in {
description = "OpenVPN-${name}";
startOn = "started network-interfaces";
stopOn = "stopping network-interfaces";
environment = { PATH = "${pkgs.coreutils}/bin"; };
script =
''
exec &> /var/log/openvpn-${name}
${config.system.sbin.modprobe} tun || true
${openvpn}/sbin/openvpn --config ${configFile}
'';
};
openvpnInstanceOptions = {
config = mkOption {
type = types.string;
description = ''
config of this openvpn instance
'';
};
up = mkOption {
default = "";
type = types.string;
description = ''
script which is run when server instance starts up succesfully.
Use it to setup firewall and routing
'';
};
down = mkOption {
default = "";
type = types.string;
description = ''
script which is run when server instance shuts down
Usually this reverts what up has done
'';
};
};
in
{
###### interface
options = {
services.openvpn = {
enable = mkOption {
default = false;
description = "Whether to enable OpenVPN.";
};
servers = mkOption {
default = {};
example = {
mostSimple = {
config = ''
# Most simple configuration: http://openvpn.net/index.php/documentation/miscellaneous/static-key-mini-howto.html.
# server :
dev tun
ifconfig 10.8.0.1 10.8.0.2
secret static.key
'';
up = "ip route add ..!";
down = "ip route add ..!";
};
clientMostSimple = {
config = ''
#client:
#remote myremote.mydomain
#dev tun
#ifconfig 10.8.0.2 10.8.0.1
#secret static.key
'';
};
serverScalable = {
config = ''
multiple clienst
see example file found in http://openvpn.net/index.php/documentation/howto.html
'';
};
};
# !!! clean up this description please
description = ''
You can define multiple openvpn instances.
The id of an instance is given by the attribute name.
Each instance will result in a new job file.
Additionally you can specify the up/ down scripts by setting
the up down properties.
Config lines up=/nix/store/xxx-up-script down=...
will be appended to your configuration file automatically
If you define at least one of up/down "script-security 2" will be
prepended to your config otherwise you scripts aren't run by openvpn
Don't forget to check that the all package sizes can be sent. For
examlpe if scp hangs you should set --fragment XXX --mssfix YYY.
'';
type = types.attrsOf types.optionSet;
options = [ openvpnInstanceOptions ];
};
};
};
###### implementation
config = mkIf cfg.enable {
jobs = listToAttrs (mapAttrsFlatten (name: value: nameValuePair "openvpn-${name}" (makeOpenVPNJob value name)) cfg.servers);
environment.systemPackages = [ openvpn ];
};
}
|