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add actor for firewall & massive refactor

pull/1/head
darkgallium 1 year ago
parent
commit
d2ae084fc1
  1. 13
      src/consul_actor.rs
  2. 15
      src/diplonat.rs
  3. 37
      src/fw.rs
  4. 80
      src/fw_actor.rs
  5. 4
      src/main.rs
  6. 12
      src/messages.rs

13
src/consul_actor.rs

@ -8,11 +8,12 @@ use serde::{Serialize, Deserialize};
use serde_lexpr::{from_str,error};
use crate::messages;
use crate::consul;
use std::collections::HashSet;
#[derive(Serialize, Deserialize, Debug)]
pub enum DiplonatParameter {
tcp_port(Vec<u16>),
udp_port(Vec<u16>)
tcp_port(HashSet<u16>),
udp_port(HashSet<u16>)
}
#[derive(Serialize, Deserialize, Debug)]
@ -53,8 +54,8 @@ fn to_parameters(catalog: &consul::CatalogNode) -> Vec<DiplonatConsul> {
fn to_open_ports(params: &Vec<DiplonatConsul>) -> messages::PublicExposedPorts {
let mut op = messages::PublicExposedPorts {
tcp_ports: Vec::new(),
udp_ports: Vec::new()
tcp_ports: HashSet::new(),
udp_ports: HashSet::new()
};
for conf in params {
@ -73,8 +74,8 @@ fn to_open_ports(params: &Vec<DiplonatConsul>) -> messages::PublicExposedPorts {
impl ConsulActor {
pub fn new(url: &str, node: &str) -> Self {
let (tx, rx) = watch::channel(messages::PublicExposedPorts{
tcp_ports: Vec::new(),
udp_ports: Vec::new()
tcp_ports: HashSet::new(),
udp_ports: HashSet::new()
});
return Self {

15
src/diplonat.rs

@ -4,10 +4,12 @@ use tokio::try_join;
use crate::consul_actor::ConsulActor;
use crate::igd_actor::IgdActor;
use crate::environment::Environment;
use crate::fw_actor::FirewallActor;
pub struct Diplonat {
consul: ConsulActor,
igd: IgdActor
igd: IgdActor,
firewall: FirewallActor
}
impl Diplonat {
@ -21,9 +23,15 @@ impl Diplonat {
&ca.rx_open_ports
).await?;
let fw = FirewallActor::new(
env.refresh_time,
&ca.rx_open_ports
).await?;
let ctx = Self {
consul: ca,
igd: ia
igd: ia,
firewall: fw
};
return Ok(ctx);
@ -32,7 +40,8 @@ impl Diplonat {
pub async fn listen(&mut self) -> Result<()> {
try_join!(
self.consul.listen(),
self.igd.listen()
self.igd.listen(),
self.firewall.listen()
)?;
return Ok(());

37
src/fw.rs

@ -2,13 +2,7 @@ use iptables;
use regex::Regex;
use std::collections::HashSet;
use std::io;
#[derive(PartialEq,Eq,Debug,Hash)]
pub struct Port {
proto: String,
number: u16,
}
use crate::messages;
#[derive(Debug)]
pub struct FirewallError(String);
@ -17,26 +11,34 @@ impl From<iptables::error::IPTError> for FirewallError {
fn from(error: iptables::error::IPTError) -> Self {
FirewallError(error.to_string())
}
}
pub fn setup(ipt: &iptables::IPTables) -> Result<(), FirewallError> {
ipt.new_chain("filter", "DIPLONAT")?;
ipt.insert("filter", "INPUT", "-j DIPLONAT", 1)?;
Ok(())
}
pub fn open_ports(ipt: &iptables::IPTables, ports: Vec<Port>) -> Result<(), FirewallError> {
pub fn open_ports(ipt: &iptables::IPTables, ports: messages::PublicExposedPorts) -> Result<(), FirewallError> {
for p in ports.tcp_ports {
ipt.append("filter", "DIPLONAT", &format!("-p tcp --dport {} -j ACCEPT", p))?;
}
for p in ports {
ipt.append("filter", "DIPLONAT", &format!("-p {} --dport {} -j ACCEPT", p.proto, p.number))?;
for p in ports.udp_ports {
ipt.append("filter", "DIPLONAT", &format!("-p udp --dport {} -j ACCEPT", p))?;
}
Ok(())
}
pub fn get_opened_ports(ipt: &iptables::IPTables) -> Result<HashSet<Port>, FirewallError> {
let mut opened_ports: HashSet<Port> = HashSet::new();
pub fn get_opened_ports(ipt: &iptables::IPTables) -> Result<messages::PublicExposedPorts, FirewallError> {
let mut ports = messages::PublicExposedPorts {
tcp_ports: HashSet::new(),
udp_ports: HashSet::new()
};
let list = ipt.list("filter", "DIPLONAT")?;
let re = Regex::new(r"\-A.*? \-p (\w+).*\-\-dport (\d+).*?\-j ACCEPT").unwrap();
@ -50,13 +52,18 @@ pub fn get_opened_ports(ipt: &iptables::IPTables) -> Result<HashSet<Port>, Firew
let proto = String::from(raw_proto.as_str());
let number = String::from(raw_port.as_str()).parse::<u16>().unwrap();
opened_ports.insert( Port { proto, number } );
if proto == "tcp" {
ports.tcp_ports.insert(number);
} else {
ports.udp_ports.insert(number);
}
},
_ => {}
}
}
Ok(opened_ports)
Ok(ports)
}
pub fn cleanup(ipt: &iptables::IPTables) -> Result<(), FirewallError> {

80
src/fw_actor.rs

@ -0,0 +1,80 @@
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 iptables;
use crate::messages;
use crate::fw;
use std::collections::HashSet;
pub struct FirewallActor {
ipt: iptables::IPTables,
rx_ports: watch::Receiver<messages::PublicExposedPorts>,
last_ports: messages::PublicExposedPorts,
refresh: Duration
}
impl FirewallActor {
pub async fn new(_refresh: Duration, rxp: &watch::Receiver<messages::PublicExposedPorts>) -> Result<Self> {
let ctx = Self {
ipt: iptables::new(false).unwrap(),
rx_ports: rxp.clone(),
last_ports: messages::PublicExposedPorts::new(),
refresh: _refresh,
};
fw::setup(&ctx.ipt).expect("iptables setup failed");
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. Update firewall rules
match self.do_fw_update().await {
Ok(()) => debug!("Successfully updated firewall rules"),
Err(e) => error!("An error occured while updating firewall rules. {}", e),
}
}
}
pub async fn do_fw_update(&self) -> Result<()> {
let curr_opened_ports = fw::get_opened_ports(&self.ipt).unwrap();
let diff_tcp = self.last_ports.tcp_ports.difference(&curr_opened_ports.tcp_ports).copied().collect::<HashSet<u16>>();
let diff_udp = self.last_ports.udp_ports.difference(&curr_opened_ports.udp_ports).copied().collect::<HashSet<u16>>();
let ports_to_open = messages::PublicExposedPorts {
tcp_ports: diff_tcp,
udp_ports: diff_udp
};
fw::open_ports(&self.ipt, ports_to_open).unwrap();
return Ok(());
}
}

4
src/main.rs

@ -5,6 +5,7 @@ mod consul_actor;
mod igd_actor;
mod diplonat;
mod fw;
mod fw_actor;
use iptables;
use log::*;
@ -15,9 +16,6 @@ async fn main() {
pretty_env_logger::init();
info!("Starting Diplonat");
let ipt = iptables::new(false).unwrap();
fw::setup(&ipt).expect("iptables setup failed");
let mut diplo = Diplonat::new().await.expect("Setup failed");
diplo.listen().await.expect("A runtime error occured");
}

12
src/messages.rs

@ -1,14 +1,16 @@
#[derive(Debug, Clone)]
use std::collections::HashSet;
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct PublicExposedPorts {
pub tcp_ports: Vec<u16>,
pub udp_ports: Vec<u16>
pub tcp_ports: HashSet<u16>,
pub udp_ports: HashSet<u16>
}
impl PublicExposedPorts {
pub fn new() -> Self {
return Self {
tcp_ports: Vec::new(),
udp_ports: Vec::new()
tcp_ports: HashSet::new(),
udp_ports: HashSet::new()
}
}
}
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