Many changes for 0.9.0

CHANGELOG.md

@@ -2,11 +2,16 @@
 
 This project follows [semantic versioning](http://semver.org).
 
-### UNRELEASED
+### v0.9.0 (UNRELEASED)
 
+- [added] Added keepalive option for nodes behind NAT
+- [added] Added ability to write out statistics file with peers and traffic info
+- [added] Added dummy device type that does not allocate an interface
+- [changed] Using ring instead of libsodium
+- [changed] Using PBKDF2 for shared keys (**incompatible**)
 - [fixed] Hashed magics now also consider first character (**incompatible**)
 
-### v0.8.2 (2018-01-02)
+### v0.8.2 (2019-01-02)
 
 - [changed] Using serde instead of rustc_serialize
 - [changed] Updated libsodium to 1.0.16

Cargo.lock

@@ -961,7 +961,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "vpncloud"
-version = "0.8.2"
+version = "0.9.0"
 dependencies = [
  "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "cc 1.0.28 (registry+https://github.com/rust-lang/crates.io-index)",

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "vpncloud"
-version = "0.8.2"
+version = "0.9.0"
-authors = ["Dennis Schwerdel <schwerdel@informatik.uni-kl.de>"]
+authors = ["Dennis Schwerdel <schwerdel@googlemail.com>"]
 build = "build.rs"
 license = "GPL-3.0"
 description = "Peer-to-peer VPN"

src/cloud.rs

@@ -19,8 +19,9 @@ use signal::{trap::Trap, Signal};
 use rand::{prelude::*, random, thread_rng};
 use net2::UdpBuilder;
 
+use super::config::Config;
 use super::types::{Table, Protocol, Range, Error, HeaderMagic, NodeId};
-use super::device::Device;
+use super::device::{Device, Type};
 use super::udpmessage::{encode, decode, Message};
 use super::crypto::Crypto;
 use super::port_forwarding::PortForwarding;
@@ -214,26 +215,25 @@ pub struct GenericCloud<P: Protocol, T: Table> {
 }
 
 impl<P: Protocol, T: Table> GenericCloud<P, T> {
-    #[allow(unknown_lints,clippy::too_many_arguments)]
+    pub fn new(config: &Config, device: Device, table: T,
-    pub fn new(magic: HeaderMagic, device: Device, listen: u16, table: T,
+        learning: bool, broadcast: bool, addresses: Vec<Range>,
-        peer_timeout: Duration, learning: bool, broadcast: bool, addresses: Vec<Range>,
+        crypto: Crypto, port_forwarding: Option<PortForwarding>
-        crypto: Crypto, port_forwarding: Option<PortForwarding>, stats_file: Option<String>
     ) -> Self {
         let socket4 = match UdpBuilder::new_v4().expect("Failed to obtain ipv4 socket builder")
-            .reuse_address(true).expect("Failed to set so_reuseaddr").bind(("0.0.0.0", listen)) {
+            .reuse_address(true).expect("Failed to set so_reuseaddr").bind(("0.0.0.0", config.port)) {
             Ok(socket) => socket,
-            Err(err) => fail!("Failed to open ipv4 address 0.0.0.0:{}: {}", listen, err)
+            Err(err) => fail!("Failed to open ipv4 address 0.0.0.0:{}: {}", config.port, err)
         };
         let socket6 = match UdpBuilder::new_v6().expect("Failed to obtain ipv6 socket builder")
             .only_v6(true).expect("Failed to set only_v6")
-            .reuse_address(true).expect("Failed to set so_reuseaddr").bind(("::", listen)) {
+            .reuse_address(true).expect("Failed to set so_reuseaddr").bind(("::", config.port)) {
             Ok(socket) => socket,
-            Err(err) => fail!("Failed to open ipv6 address ::{}: {}", listen, err)
+            Err(err) => fail!("Failed to open ipv6 address ::{}: {}", config.port, err)
         };
         GenericCloud{
-            magic,
+            magic: config.get_magic(),
             node_id: random(),
-            peers: PeerList::new(peer_timeout),
+            peers: PeerList::new(config.peer_timeout),
             addresses,
             learning,
             broadcast,
@@ -245,13 +245,13 @@ impl<P: Protocol, T: Table> GenericCloud<P, T> {
             device,
             crypto,
             next_peerlist: now(),
-            update_freq: peer_timeout/2-60,
+            update_freq: config.get_keepalive(),
             buffer_out: [0; 64*1024],
             next_housekeep: now(),
             next_stats_out: now() + STATS_INTERVAL,
             port_forwarding,
             traffic: TrafficStats::new(),
-            stats_file,
+            stats_file: config.stats_file.clone(),
             _dummy_p: PhantomData,
         }
     }
@@ -635,7 +635,13 @@ impl<P: Protocol, T: Table> GenericCloud<P, T> {
         let device_fd = self.device.as_raw_fd();
         try_fail!(poll_handle.register(socket4_fd, Flags::READ), "Failed to add ipv4 socket to poll handle: {}");
         try_fail!(poll_handle.register(socket6_fd, Flags::READ), "Failed to add ipv6 socket to poll handle: {}");
-        try_fail!(poll_handle.register(device_fd, Flags::READ), "Failed to add device to poll handle: {}");
+        if let Err(err) = poll_handle.register(device_fd, Flags::READ) {
+            if self.device.get_type() != Type::Dummy {
+                fail!("Failed to add device to poll handle: {}", err);
+            } else {
+                warn!("Failed to add device to poll handle: {}", err);
+            } 
+        }
         let mut buffer = [0; 64*1024];
         let mut poll_error = false;
         loop {
@@ -658,8 +664,10 @@ impl<P: Protocol, T: Table> GenericCloud<P, T> {
                             fd if fd == socket6_fd => try_fail!(self.socket6.recv_from(&mut buffer), "Failed to read from ipv6 network socket: {}"),
                             _ => unreachable!()
                         };
-                        self.traffic.count_in_traffic(src, size);
+                        if let Err(e) = decode(&mut buffer[..size], self.magic, &mut self.crypto).and_then(|msg| {
-                        if let Err(e) = decode(&mut buffer[..size], self.magic, &mut self.crypto).and_then(|msg| self.handle_net_message(src, msg)) {
+                            self.traffic.count_in_traffic(src, size);
+                            self.handle_net_message(src, msg)
+                        }) {
                             error!("Error: {}, from: {}", e, src);
                         }
                     },

src/config.rs

@@ -13,7 +13,7 @@ use std::hash::{Hash, Hasher};
 use siphasher::sip::SipHasher24;
 
 
-#[derive(Deserialize, Debug, PartialEq)]
+#[derive(Deserialize, Debug, PartialEq, Clone)]
 pub struct Config {
     pub device_type: Type,
     pub device_name: String,
@@ -25,6 +25,7 @@ pub struct Config {
     pub port: u16,
     pub peers: Vec<String>,
     pub peer_timeout: Duration,
+    pub keepalive: Option<Duration>,
     pub mode: Mode,
     pub dst_timeout: Duration,
     pub subnets: Vec<String>,
@@ -43,7 +44,7 @@ impl Default for Config {
             ifup: None, ifdown: None,
             crypto: CryptoMethod::ChaCha20, shared_key: None,
             magic: None,
-            port: 3210, peers: vec![], peer_timeout: 1800,
+            port: 3210, peers: vec![], peer_timeout: 1800, keepalive: None,
             mode: Mode::Normal, dst_timeout: 300,
             subnets: vec![],
             port_forwarding: true,
@@ -88,6 +89,9 @@ impl Config {
         if let Some(val) = file.peer_timeout {
             self.peer_timeout = val;
         }
+        if let Some(val) = file.keepalive {
+            self.keepalive = Some(val);
+        }
         if let Some(val) = file.mode {
             self.mode = val;
         }
@@ -147,6 +151,9 @@ impl Config {
         if let Some(val) = args.flag_peer_timeout {
             self.peer_timeout = val;
         }
+        if let Some(val) = args.flag_keepalive {
+            self.keepalive = Some(val);
+        }
         if let Some(val) = args.flag_mode {
             self.mode = val;
         }
@@ -192,6 +199,13 @@ impl Config {
             MAGIC
         }
     }
+
+    pub fn get_keepalive(&self) -> Duration {
+        match self.keepalive {
+            Some(dur) => dur,
+            None => self.peer_timeout/2-60
+        }
+    }
 }
 
 
@@ -207,6 +221,7 @@ pub struct ConfigFile {
     pub port: Option<u16>,
     pub peers: Option<Vec<String>>,
     pub peer_timeout: Option<Duration>,
+    pub keepalive: Option<Duration>,
     pub mode: Option<Mode>,
     pub dst_timeout: Option<Duration>,
     pub subnets: Option<Vec<String>>,

src/crypto.rs

@@ -10,7 +10,7 @@ use ring::digest::*;
 use super::types::Error;
 
 
-#[derive(Serialize, Deserialize, Debug, PartialEq)]
+#[derive(Serialize, Deserialize, Debug, PartialEq, Clone, Copy)]
 pub enum CryptoMethod {
     #[serde(rename = "chacha20")]
     ChaCha20,

src/device.rs

@@ -23,7 +23,10 @@ pub enum Type {
     Tun,
     /// Tap interface: This insterface transports Ethernet frames.
     #[serde(rename = "tap")]
-    Tap
+    Tap,
+    /// Dummy interface: This interface does nothing.
+    #[serde(rename = "dummy")]
+    Dummy
 }
 
 impl fmt::Display for Type {
@@ -31,6 +34,7 @@ impl fmt::Display for Type {
         match *self {
             Type::Tun => write!(formatter, "tun"),
             Type::Tap => write!(formatter, "tap"),
+            Type::Dummy => write!(formatter, "dummy")
         }
     }
 }
@@ -64,6 +68,9 @@ impl Device {
     /// # Panics
     /// This method panics if the interface name is longer than 31 bytes.
     pub fn new(ifname: &str, type_: Type) -> io::Result<Self> {
+        if type_ == Type::Dummy {
+            return Self::dummy(ifname, "/dev/null", type_);
+        }
         let fd = try!(fs::OpenOptions::new().read(true).write(true).open("/dev/net/tun"));
         // Add trailing \0 to interface name
         let mut ifname_string = String::with_capacity(32);
@@ -73,7 +80,8 @@ impl Device {
         let mut ifname_c = ifname_string.into_bytes();
         let res = match type_ {
             Type::Tun => unsafe { setup_tun_device(fd.as_raw_fd(), ifname_c.as_mut_ptr()) },
-            Type::Tap => unsafe { setup_tap_device(fd.as_raw_fd(), ifname_c.as_mut_ptr()) }
+            Type::Tap => unsafe { setup_tap_device(fd.as_raw_fd(), ifname_c.as_mut_ptr()) },
+            Type::Dummy => unreachable!()
         };
         match res {
             0 => {

src/main.rs

@@ -78,6 +78,7 @@ pub struct Args {
     flag_magic: Option<String>,
     flag_connect: Vec<String>,
     flag_peer_timeout: Option<Duration>,
+    flag_keepalive: Option<Duration>,
     flag_dst_timeout: Option<Duration>,
     flag_verbose: bool,
     flag_quiet: bool,
@@ -159,15 +160,15 @@ enum AnyCloud<P: Protocol> {
 
 impl<P: Protocol> AnyCloud<P> {
     #[allow(unknown_lints,clippy::too_many_arguments)]
-    fn new(magic: HeaderMagic, device: Device, listen: u16, table: AnyTable,
+    fn new(config: &Config, device: Device, table: AnyTable,
-            peer_timeout: Duration, learning: bool, broadcast: bool, addresses: Vec<Range>,
+            learning: bool, broadcast: bool, addresses: Vec<Range>,
-            crypto: Crypto, port_forwarding: Option<PortForwarding>, stats_file: Option<String>) -> Self {
+            crypto: Crypto, port_forwarding: Option<PortForwarding>) -> Self {
         match table {
             AnyTable::Switch(t) => AnyCloud::Switch(GenericCloud::<P, SwitchTable>::new(
-                magic, device, listen, t, peer_timeout, learning, broadcast, addresses, crypto, port_forwarding, stats_file
+                config, device,t, learning, broadcast, addresses, crypto, port_forwarding
             )),
             AnyTable::Routing(t) => AnyCloud::Routing(GenericCloud::<P, RoutingTable>::new(
-                magic, device, listen, t, peer_timeout, learning, broadcast, addresses, crypto, port_forwarding, stats_file
+                config, device,t, learning, broadcast, addresses, crypto, port_forwarding
             ))
         }
     }
@@ -211,20 +212,19 @@ fn run<P: Protocol> (config: Config) {
         ranges.push(try_fail!(Range::from_str(s), "Invalid subnet format: {} ({})", s));
     }
     let dst_timeout = config.dst_timeout;
-    let peer_timeout = config.peer_timeout;
     let (learning, broadcasting, table) = match config.mode {
         Mode::Normal => match config.device_type {
             Type::Tap => (true, true, AnyTable::Switch(SwitchTable::new(dst_timeout, 10))),
-            Type::Tun => (false, false, AnyTable::Routing(RoutingTable::new()))
+            Type::Tun => (false, false, AnyTable::Routing(RoutingTable::new())),
+            Type::Dummy => (false, false, AnyTable::Switch(SwitchTable::new(dst_timeout, 10)))
         },
         Mode::Router => (false, false, AnyTable::Routing(RoutingTable::new())),
         Mode::Switch => (true, true, AnyTable::Switch(SwitchTable::new(dst_timeout, 10))),
         Mode::Hub => (false, true, AnyTable::Switch(SwitchTable::new(dst_timeout, 10)))
     };
-    let magic = config.get_magic();
     Crypto::init();
     let crypto = match config.shared_key {
-        Some(key) => Crypto::from_shared_key(config.crypto, &key),
+        Some(ref key) => Crypto::from_shared_key(config.crypto, key),
         None => Crypto::None
     };
     let port_forwarding = if config.port_forwarding {
@@ -232,7 +232,7 @@ fn run<P: Protocol> (config: Config) {
     } else {
         None
     };
-    let mut cloud = AnyCloud::<P>::new(magic, device, config.port, table, peer_timeout, learning, broadcasting, ranges, crypto, port_forwarding, config.stats_file);
+    let mut cloud = AnyCloud::<P>::new(&config, device, table, learning,broadcasting,ranges, crypto, port_forwarding);
     if let Some(script) = config.ifup {
         run_script(&script, cloud.ifname());
     }
@@ -295,6 +295,7 @@ fn main() {
     debug!("Config: {:?}", config);
     match config.device_type {
         Type::Tap => run::<ethernet::Frame>(config),
-        Type::Tun => run::<ip::Packet>(config)
+        Type::Tun => run::<ip::Packet>(config),
+        Type::Dummy => run::<ethernet::Frame>(config)
     }
 }

src/tests.rs

@@ -456,6 +456,7 @@ peers:
   - remote.machine.foo:3210
   - remote.machine.bar:3210
 peer_timeout: 1800
+keepalive: 840
 dst_timeout: 300
 mode: normal
 subnets:
@@ -464,6 +465,7 @@ port_forwarding: true
 user: nobody
 group: nogroup
 pid_file: /run/vpncloud.run
+stats_file: /var/log/vpncloud.stats
     ";
     assert_eq!(serde_yaml::from_str::<ConfigFile>(config_file).unwrap(), ConfigFile{
         device_type: Some(Type::Tun),
@@ -476,13 +478,15 @@ pid_file: /run/vpncloud.run
         port: Some(3210),
         peers: Some(vec!["remote.machine.foo:3210".to_string(), "remote.machine.bar:3210".to_string()]),
         peer_timeout: Some(1800),
+        keepalive: Some(840),
         mode: Some(Mode::Normal),
         dst_timeout: Some(300),
         subnets: Some(vec!["10.0.1.0/24".to_string()]),
         port_forwarding: Some(true),
         user: Some("nobody".to_string()),
         group: Some("nogroup".to_string()),
-        pid_file: Some("/run/vpncloud.run".to_string())
+        pid_file: Some("/run/vpncloud.run".to_string()),
+        stats_file: Some("/var/log/vpncloud.stats".to_string())
     })
 }
 
@@ -500,13 +504,15 @@ fn config_merge() {
         port: Some(3210),
         peers: Some(vec!["remote.machine.foo:3210".to_string(), "remote.machine.bar:3210".to_string()]),
         peer_timeout: Some(1800),
+        keepalive: Some(840),
         mode: Some(Mode::Normal),
         dst_timeout: Some(300),
         subnets: Some(vec!["10.0.1.0/24".to_string()]),
         port_forwarding: Some(true),
         user: Some("nobody".to_string()),
         group: Some("nogroup".to_string()),
-        pid_file: Some("/run/vpncloud.run".to_string())
+        pid_file: Some("/run/vpncloud.run".to_string()),
+        stats_file: Some("/var/log/vpncloud.stats".to_string())
     });
     assert_eq!(config, Config{
         device_type: Type::Tun,
@@ -519,6 +525,7 @@ fn config_merge() {
         port: 3210,
         peers: vec!["remote.machine.foo:3210".to_string(), "remote.machine.bar:3210".to_string()],
         peer_timeout: 1800,
+        keepalive: Some(840),
         dst_timeout: 300,
         mode: Mode::Normal,
         port_forwarding: true,
@@ -526,6 +533,7 @@ fn config_merge() {
         user: Some("nobody".to_string()),
         group: Some("nogroup".to_string()),
         pid_file: Some("/run/vpncloud.run".to_string()),
+        stats_file: Some("/var/log/vpncloud.stats".to_string()),
         ..Default::default()
     });
     config.merge_args(Args{
@@ -538,6 +546,7 @@ fn config_merge() {
         flag_magic: Some("hash:mynet".to_string()),
         flag_listen: Some(3211),
         flag_peer_timeout: Some(1801),
+        flag_keepalive: Some(850),
         flag_dst_timeout: Some(301),
         flag_mode: Some(Mode::Switch),
         flag_subnet: vec![],
@@ -545,6 +554,7 @@ fn config_merge() {
         flag_no_port_forwarding: true,
         flag_daemon: true,
         flag_pid_file: Some("/run/vpncloud-mynet.run".to_string()),
+        flag_stats_file: Some("/var/log/vpncloud-mynet.stats".to_string()),
         flag_user: Some("root".to_string()),
         flag_group: Some("root".to_string()),
         ..Default::default()
@@ -560,6 +570,7 @@ fn config_merge() {
         port: 3211,
         peers: vec!["remote.machine.foo:3210".to_string(), "remote.machine.bar:3210".to_string(), "another:3210".to_string()],
         peer_timeout: 1801,
+        keepalive: Some(850),
         dst_timeout: 301,
         mode: Mode::Switch,
         port_forwarding: false,
@@ -567,6 +578,7 @@ fn config_merge() {
         user: Some("root".to_string()),
         group: Some("root".to_string()),
         pid_file: Some("/run/vpncloud-mynet.run".to_string()),
+        stats_file: Some("/var/log/vpncloud-mynet.stats".to_string()),
         daemonize: true,
         ..Default::default()
     });

src/usage.txt

@@ -19,6 +19,8 @@ Options:
     --crypto <method>               The encryption method to use ("aes256", or
                                     "chacha20").
     --peer-timeout <secs>           Peer timeout in seconds.
+    --keepalive <secs>              Periodically send message to keep
+                                    connections alive.
     --dst-timeout <secs>            Switch table entry timeout in seconds.
     --ifup <command>                A command to setup the network interface.
     --ifdown <command>              A command to bring down the network