vpncloud/src/main.rs

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// VpnCloud - Peer-to-Peer VPN
// Copyright (C) 2015-2016 Dennis Schwerdel
// This software is licensed under GPL-3 or newer (see LICENSE.md)
#![cfg_attr(feature = "bench", feature(test))]
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#[macro_use] extern crate log;
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#[macro_use] extern crate bitflags;
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extern crate time;
extern crate docopt;
extern crate rustc_serialize;
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extern crate signal;
extern crate nix;
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extern crate libc;
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extern crate aligned_alloc;
extern crate rand;
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extern crate fnv;
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extern crate net2;
extern crate yaml_rust;
#[cfg(feature = "bench")] extern crate test;
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#[macro_use] pub mod util;
pub mod types;
pub mod crypto;
pub mod udpmessage;
pub mod ethernet;
pub mod ip;
pub mod cloud;
pub mod device;
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pub mod poll;
pub mod config;
pub mod configfile;
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#[cfg(test)] mod tests;
#[cfg(feature = "bench")] mod benches;
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use docopt::Docopt;
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use std::str::FromStr;
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use std::process::Command;
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use device::{Device, Type};
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use ethernet::SwitchTable;
use ip::RoutingTable;
use types::{Mode, Range, Table, Protocol, HeaderMagic};
use cloud::GenericCloud;
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use crypto::{Crypto, CryptoMethod};
use util::Duration;
use config::Config;
const VERSION: u8 = 1;
const MAGIC: HeaderMagic = *b"vpn\x01";
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static USAGE: &'static str = include_str!("usage.txt");
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#[derive(RustcDecodable, Debug, Default)]
pub struct Args {
flag_config: Option<String>,
flag_type: Option<Type>,
flag_mode: Option<Mode>,
flag_shared_key: Option<String>,
flag_crypto: Option<CryptoMethod>,
flag_subnet: Vec<String>,
flag_device: Option<String>,
flag_listen: Option<u16>,
flag_network_id: Option<String>,
flag_magic: Option<String>,
flag_connect: Vec<String>,
flag_peer_timeout: Option<Duration>,
flag_dst_timeout: Option<Duration>,
flag_verbose: bool,
flag_quiet: bool,
flag_ifup: Option<String>,
flag_ifdown: Option<String>,
flag_version: bool
}
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struct SimpleLogger;
impl log::Log for SimpleLogger {
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#[inline]
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fn enabled(&self, _metadata: &log::LogMetadata) -> bool {
true
}
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#[inline]
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fn log(&self, record: &log::LogRecord) {
if self.enabled(record.metadata()) {
println!("{} - {}", record.level(), record.args());
}
}
}
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fn run_script(script: String, ifname: &str) {
let mut cmd = Command::new("sh");
cmd.arg("-c").arg(&script).env("IFNAME", ifname);
debug!("Running script: {:?}", cmd);
match cmd.status() {
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Ok(status) => if status.success() {
()
} else {
error!("Script returned with error: {:?}", status.code())
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},
Err(e) => error!("Failed to execute script {:?}: {}", script, e)
}
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}
fn run<T: Protocol> (config: Config) {
let device = try_fail!(Device::new(&config.device_name, config.device_type),
"Failed to open virtual {} interface {}: {}", config.device_type, config.device_name);
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info!("Opened device {}", device.ifname());
let mut ranges = Vec::with_capacity(config.subnets.len());
for s in &config.subnets {
ranges.push(try_fail!(Range::from_str(s), "Invalid subnet format: {} ({})", s));
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}
let dst_timeout = config.dst_timeout;
let peer_timeout = config.peer_timeout;
let (learning, broadcasting, table): (bool, bool, Box<Table>) = match config.mode {
Mode::Normal => match config.device_type {
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Type::Tap => (true, true, Box::new(SwitchTable::new(dst_timeout))),
Type::Tun => (false, false, Box::new(RoutingTable::new()))
},
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Mode::Router => (false, false, Box::new(RoutingTable::new())),
Mode::Switch => (true, true, Box::new(SwitchTable::new(dst_timeout))),
Mode::Hub => (false, true, Box::new(SwitchTable::new(dst_timeout)))
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};
let magic = config.get_magic();
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Crypto::init();
let crypto = match config.shared_key {
Some(key) => Crypto::from_shared_key(config.crypto, &key),
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None => Crypto::None
};
let mut cloud = GenericCloud::<T>::new(magic, device, config.port, table, peer_timeout, learning, broadcasting, ranges, crypto);
if let Some(script) = config.ifup {
run_script(script, cloud.ifname());
}
for addr in config.peers {
try_fail!(cloud.connect(&addr as &str), "Failed to send message to {}: {}", &addr);
cloud.add_reconnect_peer(addr);
}
cloud.run();
if let Some(script) = config.ifdown {
run_script(script, cloud.ifname());
}
}
fn main() {
let args: Args = Docopt::new(USAGE).and_then(|d| d.decode()).unwrap_or_else(|e| e.exit());
if args.flag_version {
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Crypto::init();
println!("VpnCloud v{}, protocol version {}, libsodium {} (AES256: {})",
env!("CARGO_PKG_VERSION"),
VERSION,
Crypto::sodium_version(),
Crypto::aes256_available()
);
return;
}
log::set_logger(|max_log_level| {
assert!(!args.flag_verbose || !args.flag_quiet);
if args.flag_verbose {
max_log_level.set(log::LogLevelFilter::Debug);
} else if args.flag_quiet {
max_log_level.set(log::LogLevelFilter::Error);
} else {
max_log_level.set(log::LogLevelFilter::Info);
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}
Box::new(SimpleLogger)
}).unwrap();
let mut config = Config::default();
if let Some(ref file) = args.flag_config {
info!("Reading config file '{}'", file);
let config_file = try_fail!(configfile::parse(file), "Failed to load config file: {:?}");
config.merge_file(config_file)
}
config.merge_args(args);
debug!("Config: {:?}", config);
match config.device_type {
Type::Tap => run::<ethernet::Frame>(config),
Type::Tun => run::<ip::Packet>(config)
}
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}