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