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// `error_chain!` can recurse deeply
#![recursion_limit = "1024"]
extern crate talpid_core;
#[macro_use]
extern crate clap;
#[macro_use]
extern crate error_chain;
extern crate log;
extern crate env_logger;
use std::io::{self, Read, Write};
use std::result::Result as StdResult;
use std::sync::mpsc::{self, Receiver};
use std::thread;
use talpid_core::process::openvpn::{self, OpenVpnCommand, OpenVpnEvent, OpenVpnMonitor};
mod cli;
use cli::Args;
error_chain!{}
quick_main!(run);
fn run() -> Result<()> {
init_logger()?;
let args = cli::parse_args_or_exit();
let command = create_openvpn_command(&args);
let monitor = OpenVpnMonitor::new(command, args.plugin_path);
main_loop(monitor)
}
pub fn init_logger() -> Result<()> {
env_logger::init().chain_err(|| "Failed to bootstrap logging system")
}
fn create_openvpn_command(args: &Args) -> OpenVpnCommand {
let mut command = OpenVpnCommand::new(&args.binary);
command
.config(&args.config)
.remotes(&args.remotes[..])
.unwrap()
.pipe_output(args.verbosity > 0);
command
}
fn main_loop(mut monitor: OpenVpnMonitor) -> Result<()> {
loop {
let rx = start_monitor(&mut monitor).chain_err(|| "Unable to start OpenVPN")?;
while let Ok(msg) = rx.recv() {
match msg {
OpenVpnEvent::Shutdown(clean) => {
println!("Monitored process exited. clean: {}", clean);
break;
}
OpenVpnEvent::PluginEvent(Ok((event, env))) => {
println!("OpenVPN event:\nEvent: {:?}\nENV: {:?}", event, env);
}
OpenVpnEvent::PluginEvent(Err(e)) => println!("Read error from plugin: {:?}", e),
}
}
std::thread::sleep(std::time::Duration::from_millis(500));
}
}
fn start_monitor(monitor: &mut OpenVpnMonitor)
-> StdResult<Receiver<OpenVpnEvent>, openvpn::Error> {
let (tx, rx) = mpsc::channel();
let callback = move |clean| tx.send(clean).unwrap();
monitor
.start(callback)
.map(
|(stdout, stderr)| {
stdout.map(|stream| pass_io(stream, io::stdout()));
stderr.map(|stream| pass_io(stream, io::stderr()));
rx
},
)
}
fn pass_io<I, O>(mut input: I, mut output: O)
where I: Read + Send + 'static,
O: Write + Send + 'static
{
thread::spawn(move || { io::copy(&mut input, &mut output).unwrap(); });
}
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