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
|
use atomic_write_file::AtomicWriteFile;
use core::net::SocketAddr;
use defguard_wireguard_rs::{host::Peer, InterfaceConfiguration, WGApi, WireguardInterfaceApi};
use defguard_wireguard_rs::{key::Key, net::IpAddrMask};
use log::{info, warn};
use serde::{Deserialize, Serialize};
use std::collections::BTreeSet;
use std::fs::File;
use std::io::{ErrorKind, Read, Write};
use std::net::{TcpListener, ToSocketAddrs};
use thiserror::Error;
use xdg::BaseDirectories;
use std::str::FromStr;
#[derive(Debug, Error)]
pub enum DaemonError {
#[error("{0}")]
Io(#[from] std::io::Error),
#[error("{0}")]
XdgBase(#[from] xdg::BaseDirectoriesError),
// TODO hier wärs nett zu unterscheiden was decoded wurde
#[error("{0}")]
Decoding(#[from] serde_json::Error),
#[error("{0}")]
WgInterfaceError(#[from] defguard_wireguard_rs::error::WireguardInterfaceError),
}
#[derive(Serialize, Deserialize, Clone)]
enum Endpoint {
Ip(SocketAddr),
Domain(String, u16),
}
// subset of defguard_wireguard_rs::host::Peer, with hostname added
#[derive(Serialize, Deserialize)]
struct PeerConfig {
pubkey: Key,
psk: Option<Key>,
ips: Vec<(IpAddrMask, Option<String>)>,
// if false: the hostnames are kept around for sharing, but we personally do not use them
use_hostnames: bool,
endpoint: Option<Endpoint>,
}
fn default_wg_port() -> u16 {
51820
}
#[derive(Serialize, Deserialize)]
struct Network {
name: String,
privkey: String,
// this really should be a different type, but this is what defguard takes...
address: String,
#[serde(default = "default_wg_port")]
listen_port: u16,
peers: Vec<PeerConfig>,
}
#[derive(Serialize, Deserialize, Default)]
struct Config {
networks: Vec<Network>,
}
pub fn daemon() -> Result<(), DaemonError> {
let config_path = BaseDirectories::with_prefix("mäsch")?.place_state_file("daemon.json")?;
let config: Config = match File::open(config_path) {
Ok(f) => serde_json::from_reader(f)?,
Err(e) => match e.kind() {
ErrorKind::NotFound => Config::default(),
_ => Err(e)?,
},
};
info!("read config");
//let networks = vec![Network {
// name: "kek".to_string(),
// privkey: "OK9WQudPVO5rXxcdxdtTzRmJzVu+KuqLMstYsZd8mWE=".to_string(),
// address: "1.2.3.4".to_string(),
// listen_port: 5221,
// peers: vec![PeerConfig {
// pubkey: Key::from_str("Osrxi/bRVK+FQit7YMbIgSaOWmRDOZQoh/7ddV4eEE8=").unwrap(),
// psk: Some(Key::from_str("wFiG3II9ivYBn+xjLGChC0PjNlbOibZ1K6pmspPD0Hg=").unwrap()),
// use_hostnames: true,
// endpoint: Some(Endpoint::Domain("alex.69owo.de".to_string(), 12456)),
// ips: vec![(IpAddrMask::from_str("5.4.3.2/24").unwrap(), Some("blah.blub".to_owned()))],
// }],
//}];
// TODO call wg.remove_interface on program exit using a drop impl on an 'Interface' struct
// containing the Network and WGApi
let mut hostfile = match File::open("/etc/hosts") {
Ok(mut f) => {
let mut r = String::new();
f.read_to_string(&mut r)?;
let seen_hostnames: BTreeSet<String> = r
.lines()
.map(|l| {
l.split_whitespace()
.take_while(|dom| dom.chars().next().unwrap() != '#')
.skip(1)
})
.flatten()
.map(|dom| dom.to_owned())
.collect();
Some((r, seen_hostnames))
}
Err(e) => {
warn!("failed to read /etc/hosts: {e}");
None
}
};
for nw in config.networks {
let wg = WGApi::new(nw.name.clone(), false)?;
let defguard_peers = nw
.peers
.iter()
.map(|p| Peer {
public_key: p.pubkey.clone(),
preshared_key: p.psk.clone(),
protocol_version: None,
endpoint: p
.endpoint
.clone()
.map(|e| match e {
Endpoint::Ip(ep) => Some(ep),
Endpoint::Domain(s, p) => (s, p)
.to_socket_addrs()
.ok()
.map(|mut it| it.next())
.flatten(),
})
.flatten(),
last_handshake: None,
tx_bytes: 0,
rx_bytes: 0,
persistent_keepalive_interval: None,
allowed_ips: p.ips.iter().map(|(ip_mask, _)| ip_mask.clone()).collect(),
})
.collect();
wg.create_interface()?;
wg.configure_interface(&InterfaceConfiguration {
name: nw.name.clone(),
prvkey: nw.privkey,
address: nw.address,
port: nw.listen_port as u32,
peers: defguard_peers,
})?;
if let Some((hosts_str, hosts)) = &mut hostfile {
nw.peers
.iter()
.map(|peer| {
if peer.use_hostnames {
peer.ips
.iter()
.map(|(mask, may_dom)| {
if let Some(dom) = may_dom
&& hosts.insert(dom.clone())
{
hosts_str.push_str(&format!("{}", mask.ip));
hosts_str.push('\t');
hosts_str.push_str(&dom);
hosts_str.push('\n');
}
})
.count();
}
})
.count();
}
info!("loaded configuration for {0}", nw.name);
}
info!("loaded all existing configurations");
if let Some((hosts_str, _)) = &hostfile {
info!("proposed next hosts file: {hosts_str}");
let mut f = AtomicWriteFile::open("/etc/hosts")?;
f.write(hosts_str.as_bytes())?;
f.commit();
}
// TODO open dbus & network interfaces
Ok(())
}
|
