blob: df50e9807a9061f27b6afd5375fb41aefe2cd8a9 (
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
|
{pkgs, config, ...}:
with pkgs.lib;
let
inherit (pkgs) ifplugd;
cfg = config.networking.interfaceMonitor;
# The ifplugd action script, which is called whenever the link
# status changes (i.e., a cable is plugged in or unplugged). We do
# nothing when a cable is unplugged. When a cable is plugged in, we
# restart dhclient, which will hopefully give us a new IP address
# if appropriate.
plugScript = pkgs.writeScript "ifplugd.action"
''
#! ${pkgs.stdenv.shell}
iface="$1"
status="$2"
${cfg.commands}
'';
in
{
###### interface
options = {
networking.interfaceMonitor.enable = mkOption {
default = false;
description = ''
If <literal>true</literal>, monitor Ethernet interfaces for
cables being plugged in or unplugged. When this occurs, the
<command>dhclient</command> service is restarted to
automatically obtain a new IP address. This is useful for
roaming users (laptops).
'';
};
networking.interfaceMonitor.beep = mkOption {
default = false;
description = ''
If <literal>true</literal>, beep when an Ethernet cable is
plugged in or unplugged.
'';
};
networking.interfaceMonitor.commands = mkOption {
default = "";
description = ''
Shell commands to be executed when the link status of an
interface changes. On invocation, the shell variable
<varname>iface</varname> contains the name of the interface,
while the variable <varname>status</varname> contains either
<literal>up</literal> or <literal>down</literal> to indicate
the new status.
'';
};
};
###### implementation
config = mkIf cfg.enable {
jobs.ifplugd =
{ description = "Network interface connectivity monitor";
startOn = "started network-interfaces";
stopOn = "stopping network-interfaces";
exec =
''
${ifplugd}/sbin/ifplugd --no-daemon --no-startup --no-shutdown \
${if config.networking.interfaceMonitor.beep then "" else "--no-beep"} \
--run ${plugScript}
'';
};
environment.systemPackages = [ ifplugd ];
};
}
|