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
227
228
229
230
231
|
use ::std::{error, io, fmt};
use ::std::collections::hash_map;
use hash_map::HashMap;
use crate::ip::{Ipv4Net, Ipv6Net, Endpoint};
use crate::{proto, config};
#[derive(Clone, PartialEq, Eq, Debug)]
struct Peer {
endpoint: Endpoint,
psk: Option<String>,
keepalive: u32,
ipv4: Vec<Ipv4Net>,
ipv6: Vec<Ipv6Net>,
}
#[derive(Clone, PartialEq, Eq, Debug)]
pub struct Config {
peers: HashMap<String, Peer>,
}
#[derive(Debug)]
pub struct ConfigError {
pub url: String,
pub peer: String,
pub important: bool,
err: &'static str,
}
impl error::Error for ConfigError {}
impl fmt::Display for ConfigError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "Invalid peer [{}] from [{}]: {}", self.peer, self.url, self.err)
}
}
impl Config {
pub fn new() -> Config {
Config {
peers: HashMap::new(),
}
}
pub fn add_peer(&mut self, errors: &mut Vec<ConfigError>, c: &config::PeerConfig, s: &config::Source, p: &proto::Peer) {
if !valid_key(&p.public_key) {
errors.push(ConfigError {
url: s.url.clone(),
peer: p.public_key.clone(),
important: true,
err: "Invalid public key",
});
return;
}
if let Some(ref psk) = s.psk {
if !valid_key(psk) {
errors.push(ConfigError {
url: s.url.clone(),
peer: p.public_key.clone(),
important: true,
err: "Invalid preshared key",
});
return;
}
}
if c.omit_peers.contains(&p.public_key) {
return;
}
let ent = match self.peers.entry(p.public_key.clone()) {
hash_map::Entry::Occupied(_) => {
errors.push(ConfigError {
url: s.url.clone(),
peer: p.public_key.clone(),
important: true,
err: "Duplicate public key",
});
return;
},
hash_map::Entry::Vacant(ent) => ent,
};
let mut keepalive = p.keepalive;
if c.max_keepalive != 0 && (keepalive == 0 || keepalive > c.max_keepalive) {
keepalive = c.max_keepalive;
}
if keepalive != 0 && keepalive < c.min_keepalive {
keepalive = c.min_keepalive;
}
let mut removed = false;
let mut ipv4 = p.ipv4.clone();
ipv4.retain(|i| {
let r = s.ipv4.contains(i);
if !r { removed = true; }
r
});
let mut ipv6 = p.ipv6.clone();
ipv6.retain(|i| {
let r = s.ipv6.contains(i);
if !r { removed = true; }
r
});
let r = ent.insert(Peer {
endpoint: p.endpoint.clone(),
psk: s.psk.clone(),
keepalive, ipv4, ipv6,
});
if removed {
let all = r.ipv4.is_empty() && r.ipv6.is_empty();
errors.push(ConfigError {
url: s.url.clone(),
peer: p.public_key.clone(),
important: all,
err: if all { "All IPs removed" } else {"Some IPs removed"},
});
}
}
}
impl Default for Config {
#[inline]
fn default() -> Self {
Config::new()
}
}
pub struct Device {
ifname: String,
wg_command: String,
}
impl Device {
pub fn new(ifname: String, wg_command: String) -> Self {
Device { ifname, wg_command }
}
pub fn apply_diff(&mut self, old: &Config, new: &Config) -> io::Result<()> {
use ::std::process::{Command, Stdio};
let mut proc = Command::new(&self.wg_command);
proc.stdin(Stdio::piped());
proc.stdout(Stdio::null());
proc.arg("set");
proc.arg(&self.ifname);
let mut psks = Vec::<&str>::new();
for (pubkey, conf) in new.peers.iter() {
if let Some(old_peer) = old.peers.get(pubkey) {
if *old_peer == *conf {
continue;
}
}
proc.arg("peer");
proc.arg(pubkey);
// TODO: maybe skip endpoint?
proc.arg("endpoint");
proc.arg(format!("{}", conf.endpoint));
if let Some(psk) = &conf.psk {
proc.arg("preshared-key");
proc.arg("/dev/stdin");
psks.push(psk);
}
let mut ips = String::new();
{
use std::fmt::Write;
for ip in conf.ipv4.iter() {
if !ips.is_empty() { ips.push(','); }
write!(ips, "{}", ip).unwrap();
}
for ip in conf.ipv6.iter() {
if !ips.is_empty() { ips.push(','); }
write!(ips, "{}", ip).unwrap();
}
}
proc.arg("allowed-ips");
proc.arg(ips);
}
for pubkey in old.peers.keys() {
if new.peers.contains_key(pubkey) {
continue;
}
proc.arg("peer");
proc.arg(pubkey);
proc.arg("remove");
}
let mut proc = proc.spawn()?;
{
use std::io::Write;
let stdin = proc.stdin.as_mut().unwrap();
for psk in psks {
write!(stdin, "{}\n", psk)?;
}
}
let r = proc.wait()?;
if !r.success() {
return Err(io::Error::new(io::ErrorKind::Other, "Child process failed"));
}
Ok(())
}
}
fn valid_key(s: &str) -> bool {
let s = s.as_bytes();
if s.len() != 44 {
return false;
}
if s[43] != b'=' {
return false;
}
for c in s[0..42].iter().cloned() {
if c >= b'0' && c <= b'9' { continue; }
if c >= b'A' && c <= b'Z' { continue; }
if c >= b'a' && c <= b'z' { continue; }
if c == b'+' || c <= b'/' { continue; }
return false;
}
b"048AEIMQUYcgkosw".contains(&s[42])
}
|
