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
|
use igd::aio::*;
use igd::PortMappingProtocol;
use std::net::SocketAddrV4;
use log::*;
use anyhow::{Result, Context};
use tokio::{
select,
sync::watch,
time::{
self,
Duration
}};
use crate::messages;
pub struct IgdActor {
last_ports: messages::PublicExposedPorts,
rx_ports: watch::Receiver<messages::PublicExposedPorts>,
gateway: Gateway,
refresh: Duration,
expire: Duration,
private_ip: String
}
impl IgdActor {
pub async fn new(priv_ip: &str, refresh: Duration, expire: Duration, rxp: &watch::Receiver<messages::PublicExposedPorts>) -> Result<Self> {
let gw = search_gateway(Default::default())
.await
.context("Failed to find IGD gateway")?;
info!("IGD gateway: {}", gw);
let ctx = Self {
gateway: gw,
rx_ports: rxp.clone(),
private_ip: priv_ip.to_string(),
refresh: refresh,
expire: expire,
last_ports: messages::PublicExposedPorts::new()
};
return Ok(ctx);
}
pub async fn listen(&mut self) -> Result<()> {
let mut interval = time::interval(self.refresh);
loop {
// 1. Wait for an event
let new_ports = select! {
Some(ports) = self.rx_ports.recv() => Some(ports),
_ = interval.tick() => None,
else => return Ok(()) // Sender dropped, terminate loop.
};
// 2. Update last ports if needed
if let Some(p) = new_ports { self.last_ports = p; }
// 3. Flush IGD requests
match self.do_igd().await {
Ok(()) => debug!("Successfully updated IGD"),
Err(e) => error!("An error occured while updating IGD. {}", e),
}
}
}
pub async fn do_igd(&self) -> Result<()> {
let actions = [
(PortMappingProtocol::TCP, &self.last_ports.tcp_ports),
(PortMappingProtocol::UDP, &self.last_ports.udp_ports)
];
for (proto, list) in actions.iter() {
for port in *list {
let service_str = format!("{}:{}", self.private_ip, port);
let service = service_str.parse::<SocketAddrV4>().context("Invalid socket address")?;
self.gateway.add_port(*proto, *port, service, self.expire.as_secs() as u32, "diplonat").await?;
debug!("IGD request successful for {:#?} {}", proto, service);
}
}
return Ok(());
}
}
|
