88 lines
2.3 KiB
Rust
88 lines
2.3 KiB
Rust
use iptables;
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use regex::Regex;
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use std::collections::HashSet;
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use std::io;
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use crate::messages;
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#[derive(Debug)]
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pub struct FirewallError(String);
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impl From<iptables::error::IPTError> for FirewallError {
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fn from(error: iptables::error::IPTError) -> Self {
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FirewallError(error.to_string())
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}
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}
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pub fn setup(ipt: &iptables::IPTables) -> Result<(), FirewallError> {
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ipt.new_chain("filter", "DIPLONAT")?;
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ipt.insert("filter", "INPUT", "-j DIPLONAT", 1)?;
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Ok(())
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}
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pub fn open_ports(ipt: &iptables::IPTables, ports: messages::PublicExposedPorts) -> Result<(), FirewallError> {
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for p in ports.tcp_ports {
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ipt.append("filter", "DIPLONAT", &format!("-p tcp --dport {} -j ACCEPT", p))?;
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}
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for p in ports.udp_ports {
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ipt.append("filter", "DIPLONAT", &format!("-p udp --dport {} -j ACCEPT", p))?;
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}
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Ok(())
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}
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pub fn get_opened_ports(ipt: &iptables::IPTables) -> Result<messages::PublicExposedPorts, FirewallError> {
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let mut ports = messages::PublicExposedPorts {
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tcp_ports: HashSet::new(),
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udp_ports: HashSet::new()
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};
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let list = ipt.list("filter", "DIPLONAT")?;
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let re = Regex::new(r"\-A.*? \-p (\w+).*\-\-dport (\d+).*?\-j ACCEPT").unwrap();
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for i in list {
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let caps = re.captures(&i);
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match caps {
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Some(c) => {
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let raw_proto = c.get(1).unwrap();
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let raw_port = c.get(2).unwrap();
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let proto = String::from(raw_proto.as_str());
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let number = String::from(raw_port.as_str()).parse::<u16>().unwrap();
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if proto == "tcp" {
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ports.tcp_ports.insert(number);
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} else {
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ports.udp_ports.insert(number);
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}
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},
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_ => {}
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}
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}
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Ok(ports)
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}
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pub fn cleanup(ipt: &iptables::IPTables) -> Result<(), FirewallError> {
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ipt.flush_chain("filter", "DIPLONAT")?;
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ipt.delete("filter", "INPUT", "-j DIPLONAT")?;
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ipt.delete_chain("filter", "DIPLONAT")?;
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Ok(())
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}
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/*
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fn main() {
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let ipt = iptables::new(false).unwrap();
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setup(&ipt);
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let mut test: HashSet<Port> = HashSet::new();
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test.insert(Port { proto: String::from("tcp"), number: 443 });
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let a = get_opened_ports(&ipt);
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let l = test.difference(&a).collect::<Vec<&Port>>();
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println!("{:?}", l);
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}
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*/
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