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//use rustables::{Batch, Chain, ChainMethods, Hook, MatchError, ProtoFamily,
// Protocol, Rule, RuleMethods, Table, MsgType, Policy};
//use rustables::query::{send_batch, Error as QueryError};
//use rustables::expr::{LogGroup, LogPrefix, LogPrefixError};
use ipnetwork::IpNetwork;
use std::ffi::{CString, NulError};
use std::rc::Rc;
use std::str::Utf8Error;
#[derive(thiserror::Error, Debug)]
pub enum Error {
#[error("Unable to open netlink socket to netfilter")]
NetlinkOpenError(#[source] std::io::Error),
#[error("Firewall is already started")]
AlreadyDone,
#[error("Error converting from a C String")]
NulError(#[from] NulError),
//#[error("Error creating match")]
//MatchError(#[from] MatchError),
#[error("Error converting to utf-8 string")]
Utf8Error(#[from] Utf8Error),
#[error("Error applying batch")]
BatchError(#[from] std::io::Error),
//#[error("Error applying batch")]
//QueryError(#[from] QueryError),
//#[error("Error encoding the prefix")]
//LogPrefixError(#[from] LogPrefixError),
}
const TABLE_NAME: &str = "main-table";
fn main() -> Result<(), Error> {
// let fw = Firewall::new()?;
// fw.start()?;
Ok(())
}
//
//
///// An example firewall. See the source of its `start()` method.
//pub struct Firewall {
// batch: Batch,
// inbound: Rc<Chain>,
// _outbound: Rc<Chain>,
// _forward: Rc<Chain>,
// table: Rc<Table>,
//}
//
//impl Firewall {
// pub fn new() -> Result<Self, Error> {
// let mut batch = Batch::new();
// let table = Rc::new(
// Table::new(&CString::new(TABLE_NAME)?, ProtoFamily::Inet)
// );
// batch.add(&table, MsgType::Add);
//
// // Create base chains. Base chains are hooked into a Direction/Hook.
// let inbound = Rc::new(
// Chain::from_hook(Hook::In, Rc::clone(&table))
// .verdict(Policy::Drop)
// .add_to_batch(&mut batch)
// );
// let _outbound = Rc::new(
// Chain::from_hook(Hook::Out, Rc::clone(&table))
// .verdict(Policy::Accept)
// .add_to_batch(&mut batch)
// );
// let _forward = Rc::new(
// Chain::from_hook(Hook::Forward, Rc::clone(&table))
// .verdict(Policy::Accept)
// .add_to_batch(&mut batch)
// );
//
// Ok(Firewall {
// table,
// batch,
// inbound,
// _outbound,
// _forward
// })
// }
// /// Allow some common-sense exceptions to inbound drop, and accept outbound and forward.
// pub fn start(mut self) -> Result<(), Error> {
// // Allow all established connections to get in.
// Rule::new(Rc::clone(&self.inbound))
// .established()
// .accept()
// .add_to_batch(&mut self.batch);
// // Allow all traffic on the loopback interface.
// Rule::new(Rc::clone(&self.inbound))
// .iface("lo")?
// .accept()
// .add_to_batch(&mut self.batch);
// // Allow ssh from anywhere, and log to dmesg with a prefix.
// Rule::new(Rc::clone(&self.inbound))
// .dport("22", &Protocol::TCP)?
// .accept()
// .log(None, Some(LogPrefix::new("allow ssh connection:")?))
// .add_to_batch(&mut self.batch);
//
// // Allow http from all IPs in 192.168.1.255/24 .
// let local_net = IpNetwork::new([192, 168, 1, 0].into(), 24).unwrap();
// Rule::new(Rc::clone(&self.inbound))
// .dport("80", &Protocol::TCP)?
// .snetwork(local_net)
// .accept()
// .add_to_batch(&mut self.batch);
//
// // Allow ICMP traffic, drop IGMP.
// Rule::new(Rc::clone(&self.inbound))
// .icmp()
// .accept()
// .add_to_batch(&mut self.batch);
// Rule::new(Rc::clone(&self.inbound))
// .igmp()
// .drop()
// .add_to_batch(&mut self.batch);
//
// // Log all traffic not accepted to NF_LOG group 1, accessible with ulogd.
// Rule::new(Rc::clone(&self.inbound))
// .log(Some(LogGroup(1)), None)
// .add_to_batch(&mut self.batch);
//
// let mut finalized_batch = self.batch.finalize().unwrap();
// send_batch(&mut finalized_batch)?;
// println!("table {} commited", TABLE_NAME);
// Ok(())
// }
// /// If there is any table with name TABLE_NAME, remove it.
// pub fn stop(mut self) -> Result<(), Error> {
// self.batch.add(&self.table, MsgType::Add);
// self.batch.add(&self.table, MsgType::Del);
//
// let mut finalized_batch = self.batch.finalize().unwrap();
// send_batch(&mut finalized_batch)?;
// println!("table {} destroyed", TABLE_NAME);
// Ok(())
// }
//}
//
//
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