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
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
|
{ config, pkgs, lib, ... }:
with builtins;
with lib;
let
cfg = config.tv.retiolum;
out = {
options.tv.retiolum = api;
config = mkIf cfg.enable imp;
};
api = {
enable = mkEnableOption "tv.retiolum";
name = mkOption {
type = types.str;
default = config.networking.hostName;
# Description stolen from tinc.conf(5).
description = ''
This is the name which identifies this tinc daemon. It must
be unique for the virtual private network this daemon will
connect to. The Name may only consist of alphanumeric and
underscore characters. If Name starts with a $, then the
contents of the environment variable that follows will be
used. In that case, invalid characters will be converted to
underscores. If Name is $HOST, but no such environment
variable exist, the hostname will be read using the
gethostnname() system call This is the name which identifies
the this tinc daemon.
'';
};
generateEtcHosts = mkOption {
type = types.str;
default = "both";
description = ''
If set to <literal>short</literal>, <literal>long</literal>, or <literal>both</literal>,
then generate entries in <filename>/etc/hosts</filename> from subnets.
'';
};
network = mkOption {
type = types.str;
default = "retiolum";
description = ''
The tinc network name.
It is used to generate long host entries,
and name the TUN device.
'';
};
tincPackage = mkOption {
type = types.package;
default = pkgs.tinc;
description = "Tincd package to use.";
};
hosts = mkOption {
default = null;
description = ''
Hosts package or path to use.
If a path is given, then it will be used to generate an ad-hoc package.
'';
};
iproutePackage = mkOption {
type = types.package;
default = pkgs.iproute;
description = "Iproute2 package to use.";
};
privateKeyFile = mkOption {
# TODO if it's types.path then it gets copied to /nix/store with
# bad unsafe permissions...
type = types.str;
default = "/root/src/secrets/retiolum.rsa_key.priv";
description = "Generate file with <literal>tincd -K</literal>.";
};
connectTo = mkOption {
type = types.listOf types.str;
default = [ "fastpoke" "pigstarter" "kheurop" ];
description = ''
The list of hosts in the network which the client will try to connect
to. These hosts should have an 'Address' configured which points to a
routeable IPv4 or IPv6 address.
'';
};
};
imp = {
environment.systemPackages = [ tinc hosts iproute ];
networking.extraHosts = retiolumExtraHosts;
systemd.services.retiolum = {
description = "Tinc daemon for Retiolum";
after = [ "network.target" ];
wantedBy = [ "multi-user.target" ];
path = [ tinc iproute ];
serviceConfig = {
PermissionsStartOnly = "true";
PrivateTmp = "true";
Restart = "always";
# TODO we cannot chroot (-R) b/c we use symlinks to hosts
# and the private key.
ExecStartPre = pkgs.writeScript "retiolum-init" ''
#! /bin/sh
install -o ${user.name} -m 0400 ${cfg.privateKeyFile} /tmp/retiolum-rsa_key.priv
'';
ExecStart = "${tinc}/sbin/tincd -c ${confDir} -d 0 -U ${user.name} -D";
SyslogIdentifier = "retiolum";
};
};
users.extraUsers = singleton {
inherit (user) name uid;
};
};
user = {
name = "retiolum";
uid = 301281149; # genid retiolum
};
tinc = cfg.tincPackage;
hostsType = builtins.typeOf cfg.hosts;
hosts =
if hostsType == "package" then
# use package as is
cfg.hosts
else if hostsType == "path" then
# use path to generate a package
pkgs.stdenv.mkDerivation {
name = "custom-retiolum-hosts";
src = cfg.hosts;
installPhase = ''
mkdir $out
find . -name .git -prune -o -type f -print0 | xargs -0 cp --target-directory $out
'';
}
else
abort "The option `services.retiolum.hosts' must be set to a package or a path"
;
iproute = cfg.iproutePackage;
retiolumExtraHosts = import (pkgs.runCommand "retiolum-etc-hosts"
{ }
''
generate() {
(cd ${hosts}
printf \'\'
for i in `ls`; do
names=$(hostnames $i)
for j in `sed -En 's|^ *Aliases *= *(.+)|\1|p' $i`; do
names="$names $(hostnames $j)"
done
sed -En '
s|^ *Subnet *= *([^ /]*)(/[0-9]*)? *$|\1 '"$names"'|p
' $i
done | sort
printf \'\'
)
}
case ${cfg.generateEtcHosts} in
short)
hostnames() { echo "$1"; }
generate
;;
long)
hostnames() { echo "$1.${cfg.network}"; }
generate
;;
both)
hostnames() { echo "$1.${cfg.network} $1"; }
generate
;;
*)
echo '""'
;;
esac > $out
'');
confDir = pkgs.runCommand "retiolum" {
# TODO text
executable = true;
preferLocalBuild = true;
} ''
set -euf
mkdir -p $out
ln -s ${hosts} $out/hosts
cat > $out/tinc.conf <<EOF
Name = ${cfg.name}
Device = /dev/net/tun
Interface = ${cfg.network}
${concatStrings (map (c : "ConnectTo = " + c + "\n") cfg.connectTo)}
PrivateKeyFile = /tmp/retiolum-rsa_key.priv
EOF
# source: krebscode/painload/retiolum/scripts/tinc_setup/tinc-up
cat > $out/tinc-up <<EOF
host=$out/hosts/${cfg.name}
${iproute}/sbin/ip link set \$INTERFACE up
addr4=\$(sed -n 's|^ *Subnet *= *\(10[.][^ ]*\) *$|\1|p' \$host)
if [ -n "\$addr4" ];then
${iproute}/sbin/ip -4 addr add \$addr4 dev \$INTERFACE
${iproute}/sbin/ip -4 route add 10.243.0.0/16 dev \$INTERFACE
fi
addr6=\$(sed -n 's|^ *Subnet *= *\(42[:][^ ]*\) *$|\1|p' \$host)
${iproute}/sbin/ip -6 addr add \$addr6 dev \$INTERFACE
${iproute}/sbin/ip -6 route add 42::/16 dev \$INTERFACE
EOF
chmod +x $out/tinc-up
'';
in
out
|
