14 changed files with 239 additions and 589 deletions
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -9,7 +9,6 @@ This project follows [semantic versioning](http://semver.org).
 - [changed] Warning for missing router is now info
 - [changed] New warning on claimed addresses in learning mode
 - [changed] Updated dependencies
 - [changed] Rewrote argument parsing
 - [fixed] Fixed problem that could lead to 100% cpu consumption
--- a/Cargo.lock
+++ b/Cargo.lock
@ -1,11 +1,11 @@
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 "checksum memchr 2.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "3728d817d99e5ac407411fa471ff9800a778d88a24685968b36824eaf4bee400"
 "checksum nix 0.14.1 (registry+https://github.com/rust-lang/crates.io-index)" = "6c722bee1037d430d0f8e687bbdbf222f27cc6e4e68d5caf630857bb2b6dbdce"
 "checksum nix 0.16.1 (registry+https://github.com/rust-lang/crates.io-index)" = "dd0eaf8df8bab402257e0a5c17a254e4cc1f72a93588a1ddfb5d356c801aa7cb"
 "checksum once_cell 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0b631f7e854af39a1739f401cf34a8a013dfe09eac4fa4dba91e9768bd28168d"
@ -831,8 +753,6 @@ dependencies = [
 "checksum pkg-config 0.3.17 (registry+https://github.com/rust-lang/crates.io-index)" = "05da548ad6865900e60eaba7f589cc0783590a92e940c26953ff81ddbab2d677"
 "checksum ppv-lite86 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "237a5ed80e274dbc66f86bd59c1e25edc039660be53194b5fe0a482e0f2612ea"
 "checksum privdrop 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "939fa7cbfef9c15c65cf2fb3ed57f3f2a14dca1757a556aa1ba4a7f998b2b479"
 "checksum proc-macro-error 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "98e9e4b82e0ef281812565ea4751049f1bdcdfccda7d3f459f2e138a40c08678"
 "checksum proc-macro-error-attr 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "4f5444ead4e9935abd7f27dc51f7e852a0569ac888096d5ec2499470794e2e53"
 "checksum proc-macro-hack 0.5.16 (registry+https://github.com/rust-lang/crates.io-index)" = "7e0456befd48169b9f13ef0f0ad46d492cf9d2dbb918bcf38e01eed4ce3ec5e4"
 "checksum proc-macro2 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)" = "1502d12e458c49a4c9cbff560d0fe0060c252bc29799ed94ca2ed4bb665a0101"
 "checksum quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)" = "54a21852a652ad6f610c9510194f398ff6f8692e334fd1145fed931f7fbe44ea"
@ -841,6 +761,8 @@ dependencies = [
 "checksum rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "90bde5296fc891b0cef12a6d03ddccc162ce7b2aff54160af9338f8d40df6d19"
 "checksum rand_hc 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ca3129af7b92a17112d59ad498c6f81eaf463253766b90396d39ea7a39d6613c"
 "checksum redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)" = "2439c63f3f6139d1b57529d16bc3b8bb855230c8efcc5d3a896c8bea7c3b1e84"
 "checksum regex 1.3.7 (registry+https://github.com/rust-lang/crates.io-index)" = "a6020f034922e3194c711b82a627453881bc4682166cabb07134a10c26ba7692"
 "checksum regex-syntax 0.6.17 (registry+https://github.com/rust-lang/crates.io-index)" = "7fe5bd57d1d7414c6b5ed48563a2c855d995ff777729dcd91c369ec7fea395ae"
 "checksum remove_dir_all 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "4a83fa3702a688b9359eccba92d153ac33fd2e8462f9e0e3fdf155239ea7792e"
 "checksum ring 0.16.13 (registry+https://github.com/rust-lang/crates.io-index)" = "703516ae74571f24b465b4a1431e81e2ad51336cb0ded733a55a1aa3eccac196"
 "checksum rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
@ -861,33 +783,27 @@ dependencies = [
 "checksum stdweb-derive 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "c87a60a40fccc84bef0652345bbbbbe20a605bf5d0ce81719fc476f5c03b50ef"
 "checksum stdweb-internal-macros 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)" = "58fa5ff6ad0d98d1ffa8cb115892b6e69d67799f6763e162a1c9db421dc22e11"
 "checksum stdweb-internal-runtime 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "213701ba3370744dcd1a12960caa4843b3d68b4d1c0a5d575e0d65b2ee9d16c0"
-"checksum strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
+"checksum strsim 0.9.3 (registry+https://github.com/rust-lang/crates.io-index)" = "6446ced80d6c486436db5c078dde11a9f73d42b57fb273121e160b84f63d894c"
 "checksum structopt 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)" = "863246aaf5ddd0d6928dfeb1a9ca65f505599e4e1b399935ef7e75107516b4ef"
 "checksum structopt-derive 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)" = "d239ca4b13aee7a2142e6795cbd69e457665ff8037aed33b3effdc430d2f927a"
 "checksum syn 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)" = "ef781e621ee763a2a40721a8861ec519cb76966aee03bb5d00adb6a31dc1c1de"
 "checksum syn-mid 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7be3539f6c128a931cf19dcee741c1af532c7fd387baa739c03dd2e96479338a"
 "checksum tempfile 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7a6e24d9338a0a5be79593e2fa15a648add6138caa803e2d5bc782c371732ca9"
-"checksum textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
+"checksum thread_local 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "d40c6d1b69745a6ec6fb1ca717914848da4b44ae29d9b3080cbee91d72a69b14"
 "checksum time 0.2.16 (registry+https://github.com/rust-lang/crates.io-index)" = "3a51cadc5b1eec673a685ff7c33192ff7b7603d0b75446fb354939ee615acb15"
 "checksum time-macros 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "9ae9b6e9f095bc105e183e3cd493d72579be3181ad4004fceb01adbe9eecab2d"
 "checksum time-macros-impl 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "e5c3be1edfad6027c69f5491cf4cb310d1a71ecd6af742788c6ff8bced86b8fa"
 "checksum unicode-bidi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "49f2bd0c6468a8230e1db229cff8029217cf623c767ea5d60bfbd42729ea54d5"
 "checksum unicode-normalization 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)" = "5479532badd04e128284890390c1e876ef7a993d0570b3597ae43dfa1d59afa4"
 "checksum unicode-segmentation 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e83e153d1053cbb5a118eeff7fd5be06ed99153f00dbcd8ae310c5fb2b22edc0"
 "checksum unicode-width 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "caaa9d531767d1ff2150b9332433f32a24622147e5ebb1f26409d5da67afd479"
 "checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
 "checksum untrusted 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)" = "a156c684c91ea7d62626509bce3cb4e1d9ed5c4d978f7b4352658f96a4c26b4a"
 "checksum url 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "829d4a8476c35c9bf0bbce5a3b23f4106f79728039b726d292bb93bc106787cb"
 "checksum vec_map 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
 "checksum version_check 0.9.2 (registry+https://github.com/rust-lang/crates.io-index)" = "b5a972e5669d67ba988ce3dc826706fb0a8b01471c088cb0b6110b805cc36aed"
 "checksum void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
 "checksum wasi 0.9.0+wasi-snapshot-preview1 (registry+https://github.com/rust-lang/crates.io-index)" = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
-"checksum wasm-bindgen 0.2.63 (registry+https://github.com/rust-lang/crates.io-index)" = "4c2dc4aa152834bc334f506c1a06b866416a8b6697d5c9f75b9a689c8486def0"
+"checksum wasm-bindgen 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)" = "e3c7d40d09cdbf0f4895ae58cf57d92e1e57a9dd8ed2e8390514b54a47cc5551"
-"checksum wasm-bindgen-backend 0.2.63 (registry+https://github.com/rust-lang/crates.io-index)" = "ded84f06e0ed21499f6184df0e0cb3494727b0c5da89534e0fcc55c51d812101"
+"checksum wasm-bindgen-backend 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)" = "c3972e137ebf830900db522d6c8fd74d1900dcfc733462e9a12e942b00b4ac94"
-"checksum wasm-bindgen-macro 0.2.63 (registry+https://github.com/rust-lang/crates.io-index)" = "838e423688dac18d73e31edce74ddfac468e37b1506ad163ffaf0a46f703ffe3"
+"checksum wasm-bindgen-macro 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)" = "2cd85aa2c579e8892442954685f0d801f9129de24fa2136b2c6a539c76b65776"
-"checksum wasm-bindgen-macro-support 0.2.63 (registry+https://github.com/rust-lang/crates.io-index)" = "3156052d8ec77142051a533cdd686cba889537b213f948cd1d20869926e68e92"
+"checksum wasm-bindgen-macro-support 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)" = "8eb197bd3a47553334907ffd2f16507b4f4f01bbec3ac921a7719e0decdfe72a"
-"checksum wasm-bindgen-shared 0.2.63 (registry+https://github.com/rust-lang/crates.io-index)" = "c9ba19973a58daf4db6f352eda73dc0e289493cd29fb2632eb172085b6521acd"
+"checksum wasm-bindgen-shared 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)" = "a91c2916119c17a8e316507afaaa2dd94b47646048014bbdf6bef098c1bb58ad"
-"checksum web-sys 0.3.40 (registry+https://github.com/rust-lang/crates.io-index)" = "7b72fe77fd39e4bd3eaa4412fd299a0be6b3dfe9d2597e2f1c20beb968f41d17"
+"checksum web-sys 0.3.39 (registry+https://github.com/rust-lang/crates.io-index)" = "8bc359e5dd3b46cb9687a051d50a2fdd228e4ba7cf6fcf861a5365c3d671a642"
 "checksum winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)" = "8093091eeb260906a183e6ae1abdba2ef5ef2257a21801128899c3fc699229c6"
 "checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 "checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
--- a/Cargo.toml
+++ b/Cargo.toml
@ -13,7 +13,7 @@ edition = "2018"
 [dependencies]
 time = "0.2"
-structopt = "0.3"
+docopt = "^1"
 serde = "1.0"
 serde_derive = "1.0"
 serde_yaml = "0.8"
--- a/src/cloud.rs
+++ b/src/cloud.rs
@ -28,7 +28,7 @@ use super::{
    traffic::TrafficStats,
    types::{Error, HeaderMagic, NodeId, Protocol, Range, Table},
    udpmessage::{decode, encode, Message},
-    util::{addr_nice, resolve, CtrlC, Duration, Time, TimeSource}
+    util::{resolve, CtrlC, Duration, Time, TimeSource}
 };
 pub type Hash = BuildHasherDefault<FnvHasher>;
@ -73,7 +73,7 @@ impl<TS: TimeSource> PeerList<TS> {
            }
        }
        for addr in &del {
-            info!("Forgot peer: {}", addr_nice(*addr));
+            info!("Forgot peer: {}", addr);
            if let Some(data) = self.peers.remove(addr) {
                self.nodes.remove(&data.node_id);
                self.addresses.remove(addr);
@ -113,7 +113,7 @@ impl<TS: TimeSource> PeerList<TS> {
    #[inline]
    fn add(&mut self, node_id: NodeId, addr: SocketAddr, peer_timeout: u16) {
        if self.nodes.insert(node_id, addr).is_none() {
-            info!("New peer: {}", addr_nice(addr));
+            info!("New peer: {}", addr);
            let mut alt_addrs = vec![];
            if let SocketAddr::V6(v6_addr) = addr {
                if let Some(ipv4) = v6_addr.ip().to_ipv4() {
@ -188,7 +188,7 @@ impl<TS: TimeSource> PeerList<TS> {
    #[inline]
    fn remove(&mut self, addr: &SocketAddr) {
        if let Some(data) = self.peers.remove(addr) {
-            info!("Removed peer: {}", addr_nice(*addr));
+            info!("Removed peer: {}", addr);
            self.nodes.remove(&data.node_id);
            self.addresses.remove(addr);
            for addr in data.alt_addrs {
@ -199,10 +199,10 @@ impl<TS: TimeSource> PeerList<TS> {
    #[inline]
    fn write_out<W: Write>(&self, out: &mut W) -> Result<(), io::Error> {
-        writeln!(out, "peers:")?;
+        writeln!(out, "Peers:")?;
        let now = TS::now();
        for (addr, data) in &self.peers {
-            writeln!(out, "  - \"{}\": {{ ttl_secs: {} }}", addr_nice(*addr), data.timeout - now)?;
+            writeln!(out, " - {} (ttl: {} s)", addr, data.timeout - now)?;
        }
        Ok(())
    }
@ -238,7 +238,6 @@ pub struct GenericCloud<D: Device, P: Protocol, T: Table, S: Socket, TS: TimeSou
    update_freq: u16,
    buffer_out: [u8; 64 * 1024],
    stats_file: Option<File>,
    statsd_server: Option<String>,
    next_housekeep: Time,
    next_stats_out: Time,
    next_beacon: Time,
@ -278,7 +277,6 @@ impl<D: Device, P: Protocol, T: Table, S: Socket, TS: TimeSource> GenericCloud<D
            next_peerlist: now,
            update_freq,
            stats_file,
            statsd_server: config.statsd_server.clone(),
            buffer_out: [0; 64 * 1024],
            next_housekeep: now,
            next_stats_out: now + STATS_INTERVAL,
@ -518,7 +516,6 @@ impl<D: Device, P: Protocol, T: Table, S: Socket, TS: TimeSource> GenericCloud<D
        if self.next_stats_out < now {
            // Write out the statistics
            self.write_out_stats().map_err(|err| Error::File("Failed to write stats file", err))?;
            self.send_stats_to_statsd()?;
            self.next_stats_out = now + STATS_INTERVAL;
            self.traffic.period(Some(5));
        }
@ -578,7 +575,7 @@ impl<D: Device, P: Protocol, T: Table, S: Socket, TS: TimeSource> GenericCloud<D
        Ok(())
    }
-    /// Writes out the statistics to a file
+    /// Calculates, resets and writes out the statistics to a file
    fn write_out_stats(&mut self) -> Result<(), io::Error> {
        if let Some(ref mut f) = self.stats_file {
            debug!("Writing out stats");
@ -594,61 +591,6 @@ impl<D: Device, P: Protocol, T: Table, S: Socket, TS: TimeSource> GenericCloud<D
        Ok(())
    }
    /// Sends the statistics to a statsd endpoint
    fn send_stats_to_statsd(&mut self) -> Result<(), Error> {
        if let Some(ref endpoint) = self.statsd_server {
            let peer_traffic = self.traffic.total_peer_traffic();
            let payload_traffic = self.traffic.total_payload_traffic();
            let dropped = &self.traffic.dropped;
            let msg = format!(
                "peer_count:{}|g\ntable_entries:{}|g\n\
                traffic.protocol.inbound.bytes:{}\n\
                traffic.protocol.inbound.packets:{}\n\
                traffic.protocol.outbound.bytes:{}\n\
                traffic.protocol.outbound.packets:{}\n\
                traffic.payload.inbound.bytes:{}\n\
                traffic.payload.inbound.packets:{}\n\
                traffic.payload.outbound.bytes:{}\n\
                traffic.payload.outbound.packets:{}\n\
                invalid_protocol_traffic.bytes:{}\n\
                invalid_protocol_traffic.packets:{}\n\
                dropped_payload.bytes:{}\n\
                dropped_payload.packets:{}",
                self.peers.len(),
                self.table.len(),
                peer_traffic.in_bytes,
                peer_traffic.in_packets,
                peer_traffic.out_bytes,
                peer_traffic.out_packets,
                payload_traffic.in_bytes,
                payload_traffic.in_packets,
                payload_traffic.out_bytes,
                payload_traffic.out_packets,
                dropped.in_bytes,
                dropped.in_packets,
                dropped.out_bytes,
                dropped.out_packets
            );
            let msg_data = msg.as_bytes();
            let addrs = resolve(endpoint)?;
            if let Some(addr) = addrs.first() {
                match self.socket.send(msg_data, *addr) {
                    Ok(written) if written == msg_data.len() => Ok(()),
                    Ok(_) => {
                        Err(Error::Socket(
                            "Sent out truncated packet",
                            io::Error::new(io::ErrorKind::Other, "truncated")
                        ))
                    }
                    Err(e) => Err(Error::Socket("IOError when sending", e))
                }?
            } else {
                error!("Failed to resolve statsd server {}", endpoint);
            }
        }
        Ok(())
    }
    /// Handles payload data coming in from the local network device
    ///
    /// This method takes payload data received from the local device and parses it to obtain the
@ -677,7 +619,7 @@ impl<D: Device, P: Protocol, T: Table, S: Socket, TS: TimeSource> GenericCloud<D
                if !self.peers.contains_addr(&addr) {
                    // If the peer is not actually connected, remove the entry in the table and try
                    // to reconnect.
-                    warn!("Destination for {} not found in peers: {}", dst, addr_nice(addr));
+                    warn!("Destination for {} not found in peers: {}", dst, addr);
                    self.table.remove(&dst);
                    self.connect_sock(addr)?;
                }
@ -689,7 +631,6 @@ impl<D: Device, P: Protocol, T: Table, S: Socket, TS: TimeSource> GenericCloud<D
                    self.broadcast_msg(&mut msg)?;
                } else {
                    debug!("No destination for {} found, dropping", dst);
                    self.traffic.count_dropped_payload(end - start);
                }
            }
        }
@ -773,7 +714,7 @@ impl<D: Device, P: Protocol, T: Table, S: Socket, TS: TimeSource> GenericCloud<D
                } else {
                    self.peers.add(node_id, peer, peer_timeout);
                    if self.learning && !ranges.is_empty() {
-                        warn!("Ignoring claimed addresses received from {} in learning mode.", addr_nice(peer));
+                        warn!("Ignoring claimed addresses received from {} in learning mode.", peer);
                    } else {
                        for range in ranges {
                            self.table.learn(range.base, Some(range.prefix_len), peer);
@ -814,8 +755,7 @@ impl<D: Device, P: Protocol, T: Table, S: Socket, TS: TimeSource> GenericCloud<D
            self.traffic.count_in_traffic(src, size);
            self.handle_net_message(src, msg)
        }) {
-            error!("Error: {}, from: {}", e, addr_nice(src));
+            error!("Error: {}, from: {}", e, src);
            self.traffic.count_invalid_protocol(size);
        }
    }
--- a/src/config.rs
+++ b/src/config.rs
@ -58,7 +58,6 @@ pub struct Config {
    pub daemonize: bool,
    pub pid_file: Option<String>,
    pub stats_file: Option<String>,
    pub statsd_server: Option<String>,
    pub user: Option<String>,
    pub group: Option<String>
 }
@ -88,7 +87,6 @@ impl Default for Config {
            daemonize: false,
            pid_file: None,
            stats_file: None,
            statsd_server: None,
            user: None,
            group: None
        }
@ -165,9 +163,6 @@ impl Config {
        if let Some(val) = file.stats_file {
            self.stats_file = Some(val);
        }
        if let Some(val) = file.statsd_server {
            self.statsd_server = Some(val);
        }
        if let Some(val) = file.user {
            self.user = Some(val);
        }
@ -177,79 +172,76 @@ impl Config {
    }
    pub fn merge_args(&mut self, mut args: Args) {
-        if let Some(val) = args.type_ {
+        if let Some(val) = args.flag_type {
            self.device_type = val;
        }
-        if let Some(val) = args.device {
+        if let Some(val) = args.flag_device {
            self.device_name = val;
        }
-        if let Some(val) = args.device_path {
+        if let Some(val) = args.flag_device_path {
            self.device_path = Some(val);
        }
-        if let Some(val) = args.ifup {
+        if let Some(val) = args.flag_ifup {
            self.ifup = Some(val);
        }
-        if let Some(val) = args.ifdown {
+        if let Some(val) = args.flag_ifdown {
            self.ifdown = Some(val);
        }
-        if let Some(val) = args.crypto {
+        if let Some(val) = args.flag_crypto {
            self.crypto = val;
        }
-        if let Some(val) = args.key {
+        if let Some(val) = args.flag_shared_key {
            self.shared_key = Some(val);
        }
-        if let Some(val) = args.network_id {
+        if let Some(val) = args.flag_network_id {
            warn!("The --network-id argument is deprecated, please use --magic instead.");
            self.magic = Some(val);
        }
-        if let Some(val) = args.magic {
+        if let Some(val) = args.flag_magic {
            self.magic = Some(val);
        }
-        if let Some(val) = args.listen {
+        if let Some(val) = args.flag_listen {
            self.listen = parse_listen(&val);
        }
-        self.peers.append(&mut args.connect);
+        self.peers.append(&mut args.flag_connect);
-        if let Some(val) = args.peer_timeout {
+        if let Some(val) = args.flag_peer_timeout {
            self.peer_timeout = val;
        }
-        if let Some(val) = args.keepalive {
+        if let Some(val) = args.flag_keepalive {
            self.keepalive = Some(val);
        }
-        if let Some(val) = args.beacon_store {
+        if let Some(val) = args.flag_beacon_store {
            self.beacon_store = Some(val);
        }
-        if let Some(val) = args.beacon_load {
+        if let Some(val) = args.flag_beacon_load {
            self.beacon_load = Some(val);
        }
-        if let Some(val) = args.beacon_interval {
+        if let Some(val) = args.flag_beacon_interval {
            self.beacon_interval = val;
        }
-        if let Some(val) = args.mode {
+        if let Some(val) = args.flag_mode {
            self.mode = val;
        }
-        if let Some(val) = args.dst_timeout {
+        if let Some(val) = args.flag_dst_timeout {
            self.dst_timeout = val;
        }
-        self.subnets.append(&mut args.subnets);
+        self.subnets.append(&mut args.flag_subnet);
-        if args.no_port_forwarding {
+        if args.flag_no_port_forwarding {
            self.port_forwarding = false;
        }
-        if args.daemon {
+        if args.flag_daemon {
            self.daemonize = true;
        }
-        if let Some(val) = args.pid_file {
+        if let Some(val) = args.flag_pid_file {
            self.pid_file = Some(val);
        }
-        if let Some(val) = args.stats_file {
+        if let Some(val) = args.flag_stats_file {
            self.stats_file = Some(val);
        }
-        if let Some(val) = args.statsd_server {
+        if let Some(val) = args.flag_user {
            self.statsd_server = Some(val);
        }
        if let Some(val) = args.user {
            self.user = Some(val);
        }
-        if let Some(val) = args.group {
+        if let Some(val) = args.flag_group {
            self.group = Some(val);
        }
    }
@ -306,7 +298,6 @@ pub struct ConfigFile {
    pub port_forwarding: Option<bool>,
    pub pid_file: Option<String>,
    pub stats_file: Option<String>,
    pub statsd_server: Option<String>,
    pub user: Option<String>,
    pub group: Option<String>
 }
@ -341,7 +332,6 @@ user: nobody
 group: nogroup
 pid_file: /run/vpncloud.run
 stats_file: /var/log/vpncloud.stats
 statsd_server: example.com:1234
    ";
    assert_eq!(serde_yaml::from_str::<ConfigFile>(config_file).unwrap(), ConfigFile {
        device_type: Some(Type::Tun),
@ -367,8 +357,7 @@ statsd_server: example.com:1234
        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()),
+        stats_file: Some("/var/log/vpncloud.stats".to_string())
        statsd_server: Some("example.com:1234".to_string())
    })
 }
@ -399,8 +388,7 @@ 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()),
+        stats_file: Some("/var/log/vpncloud.stats".to_string())
        statsd_server: Some("example.com:1234".to_string())
    });
    assert_eq!(config, Config {
        device_type: Type::Tun,
@ -426,35 +414,33 @@ fn config_merge() {
        group: Some("nogroup".to_string()),
        pid_file: Some("/run/vpncloud.run".to_string()),
        stats_file: Some("/var/log/vpncloud.stats".to_string()),
        statsd_server: Some("example.com:1234".to_string()),
        ..Default::default()
    });
    config.merge_args(Args {
-        type_: Some(Type::Tap),
+        flag_type: Some(Type::Tap),
-        device: Some("vpncloud0".to_string()),
+        flag_device: Some("vpncloud0".to_string()),
-        device_path: Some("/dev/null".to_string()),
+        flag_device_path: Some("/dev/null".to_string()),
-        ifup: Some("ifconfig $IFNAME 10.0.1.2/16 mtu 1400 up".to_string()),
+        flag_ifup: Some("ifconfig $IFNAME 10.0.1.2/16 mtu 1400 up".to_string()),
-        ifdown: Some("ifconfig $IFNAME down".to_string()),
+        flag_ifdown: Some("ifconfig $IFNAME down".to_string()),
-        crypto: Some(CryptoMethod::ChaCha20),
+        flag_crypto: Some(CryptoMethod::ChaCha20),
-        key: Some("anothersecret".to_string()),
+        flag_shared_key: Some("anothersecret".to_string()),
-        magic: Some("hash:mynet".to_string()),
+        flag_magic: Some("hash:mynet".to_string()),
-        listen: Some("3211".to_string()),
+        flag_listen: Some("3211".to_string()),
-        peer_timeout: Some(1801),
+        flag_peer_timeout: Some(1801),
-        keepalive: Some(850),
+        flag_keepalive: Some(850),
-        dst_timeout: Some(301),
+        flag_dst_timeout: Some(301),
-        beacon_store: Some("/run/vpncloud.beacon.out2".to_string()),
+        flag_beacon_store: Some("/run/vpncloud.beacon.out2".to_string()),
-        beacon_load: Some("/run/vpncloud.beacon.in2".to_string()),
+        flag_beacon_load: Some("/run/vpncloud.beacon.in2".to_string()),
-        beacon_interval: Some(3600),
+        flag_beacon_interval: Some(3600),
-        mode: Some(Mode::Switch),
+        flag_mode: Some(Mode::Switch),
-        subnets: vec![],
+        flag_subnet: vec![],
-        connect: vec!["another:3210".to_string()],
+        flag_connect: vec!["another:3210".to_string()],
-        no_port_forwarding: true,
+        flag_no_port_forwarding: true,
-        daemon: true,
+        flag_daemon: true,
-        pid_file: Some("/run/vpncloud-mynet.run".to_string()),
+        flag_pid_file: Some("/run/vpncloud-mynet.run".to_string()),
-        stats_file: Some("/var/log/vpncloud-mynet.stats".to_string()),
+        flag_stats_file: Some("/var/log/vpncloud-mynet.stats".to_string()),
-        statsd_server: Some("example.com:2345".to_string()),
+        flag_user: Some("root".to_string()),
-        user: Some("root".to_string()),
+        flag_group: Some("root".to_string()),
        group: Some("root".to_string()),
        ..Default::default()
    });
    assert_eq!(config, Config {
@ -485,7 +471,6 @@ fn config_merge() {
        group: Some("root".to_string()),
        pid_file: Some("/run/vpncloud-mynet.run".to_string()),
        stats_file: Some("/var/log/vpncloud-mynet.stats".to_string()),
        statsd_server: Some("example.com:2345".to_string()),
        daemonize: true
    });
 }
--- a/src/crypto.rs
+++ b/src/crypto.rs
@ -2,7 +2,7 @@
 // Copyright (C) 2015-2020  Dennis Schwerdel
 // This software is licensed under GPL-3 or newer (see LICENSE.md)
-use std::{num::NonZeroU32, str::FromStr};
+use std::num::NonZeroU32;
 use ring::{aead::*, pbkdf2, rand::*};
@ -19,17 +19,6 @@ pub enum CryptoMethod {
    #[serde(rename = "aes256")]
    AES256
 }
 impl FromStr for CryptoMethod {
    type Err = &'static str;
    fn from_str(text: &str) -> Result<Self, Self::Err> {
        Ok(match &text.to_lowercase() as &str {
            "chacha20" | "chacha" => Self::ChaCha20,
            "aes256" | "aes" => Self::AES256,
            _ => return Err("Unknown method")
        })
    }
 }
 pub struct CryptoData {
    crypto_key: LessSafeKey,
--- a/src/device.rs
+++ b/src/device.rs
@ -6,8 +6,7 @@ use std::{
    collections::VecDeque,
    fmt, fs,
    io::{self, Error as IoError, ErrorKind, Read, Write},
-    os::unix::io::{AsRawFd, RawFd},
+    os::unix::io::{AsRawFd, RawFd}
    str::FromStr
 };
 use super::types::Error;
@ -24,7 +23,7 @@ pub enum Type {
    /// Tun interface: This interface transports IP packets.
    #[serde(rename = "tun")]
    Tun,
-    /// Tap interface: This interface transports Ethernet frames.
+    /// Tap interface: This insterface transports Ethernet frames.
    #[serde(rename = "tap")]
    Tap,
    /// Dummy interface: This interface does nothing.
@ -42,18 +41,6 @@ impl fmt::Display for Type {
    }
 }
 impl FromStr for Type {
    type Err = &'static str;
    fn from_str(text: &str) -> Result<Self, Self::Err> {
        Ok(match &text.to_lowercase() as &str {
            "tun" => Self::Tun,
            "tap" => Self::Tap,
            "dummy" => Self::Dummy,
            _ => return Err("Unknown device type")
        })
    }
 }
 pub trait Device: AsRawFd {
    /// Returns the type of this device
--- a/src/ethernet.rs
+++ b/src/ethernet.rs
@ -14,7 +14,7 @@ use fnv::FnvHasher;
 use super::{
    types::{Address, Error, Protocol, Table},
-    util::{addr_nice, Duration, Time, TimeSource}
+    util::{Duration, Time, TimeSource}
 };
 /// An ethernet frame dissector
@ -110,15 +110,9 @@ impl<TS: TimeSource> Table for SwitchTable<TS> {
    /// Write out the table
    fn write_out<W: Write>(&self, out: &mut W) -> Result<(), io::Error> {
        let now = TS::now();
-        writeln!(out, "switch_table:")?;
+        writeln!(out, "Switch table:")?;
        for (addr, val) in &self.table {
-            writeln!(
+            writeln!(out, " - {} => {} (ttl: {} s)", addr, val.address, val.timeout - now)?;
                out,
                "  - \"{}\": {{ peer: \"{}\", ttl_secs: {} }}",
                addr,
                addr_nice(val.address),
                val.timeout - now
            )?;
        }
        Ok(())
    }
@ -130,7 +124,7 @@ impl<TS: TimeSource> Table for SwitchTable<TS> {
        match self.table.entry(key) {
            Entry::Vacant(entry) => {
                entry.insert(SwitchTableValue { address: addr, timeout: deadline });
-                info!("Learned address {} => {}", key, addr_nice(addr));
+                info!("Learned address {} => {}", key, addr);
            }
            Entry::Occupied(mut entry) => {
                let mut entry = entry.get_mut();
@ -171,10 +165,6 @@ impl<TS: TimeSource> Table for SwitchTable<TS> {
            self.table.remove(&key);
        }
    }
    fn len(&self) -> usize {
        self.table.len()
    }
 }
--- a/src/ip.rs
+++ b/src/ip.rs
@ -11,10 +11,7 @@ use std::{
 use fnv::FnvHasher;
-use super::{
+use super::types::{Address, Error, Protocol, Table};
    types::{Address, Error, Protocol, Table},
    util::addr_nice
 };
 /// An IP packet dissector
@ -88,7 +85,7 @@ impl Table for RoutingTable {
            Some(val) => val,
            None => addr.len * 8
        };
-        info!("New routing entry: {}/{} => {}", addr, prefix_len, addr_nice(address));
+        info!("New routing entry: {}/{} => {}", addr, prefix_len, address);
        // Round the prefix length down to the next multiple of 8 and extraxt a prefix of that
        // length.
        let group_len = prefix_len as usize / 8;
@ -156,16 +153,10 @@ impl Table for RoutingTable {
    /// Write out the table
    fn write_out<W: Write>(&self, out: &mut W) -> Result<(), io::Error> {
-        writeln!(out, "routing_table:")?;
+        writeln!(out, "Routing table:")?;
        for entries in self.0.values() {
            for entry in entries {
-                writeln!(
+                writeln!(out, " - {}/{} => {}", entry.bytes, entry.prefix_len, entry.address)?;
                    out,
                    "  - \"{}/{}\": {{ peer: \"{}\" }}",
                    entry.bytes,
                    entry.prefix_len,
                    addr_nice(entry.address)
                )?;
            }
        }
        Ok(())
@ -184,10 +175,6 @@ impl Table for RoutingTable {
            entry.retain(|entr| &entr.address != addr);
        }
    }
    fn len(&self) -> usize {
        self.0.len()
    }
 }
--- a/src/main.rs
+++ b/src/main.rs
@ -30,7 +30,7 @@ pub mod traffic;
 pub mod types;
 pub mod udpmessage;
-use structopt::StructOpt;
+use docopt::Docopt;
 use std::{
    fs::{self, File, Permissions},
@ -59,131 +59,41 @@ use crate::{
 const VERSION: u8 = 1;
 const MAGIC: HeaderMagic = *b"vpn\x01";
 static USAGE: &str = include_str!("usage.txt");
-#[derive(StructOpt, Debug, Default)]
+
 #[derive(Deserialize, Debug, Default)]
 pub struct Args {
-    /// Read configuration options from the specified file.
+    flag_config: Option<String>,
-    #[structopt(long)]
+    flag_type: Option<Type>,
-    config: Option<String>,
+    flag_device_path: Option<String>,
-
+    flag_mode: Option<Mode>,
-    /// Set the type of network ("tap" or "tun")
+    flag_shared_key: Option<String>,
-    #[structopt(name = "type", short, long)]
+    flag_crypto: Option<CryptoMethod>,
-    type_: Option<Type>,
+    flag_subnet: Vec<String>,
-
+    flag_device: Option<String>,
-    /// Set the path of the base device
+    flag_listen: Option<String>,
-    #[structopt(long)]
+    flag_network_id: Option<String>,
-    device_path: Option<String>,
+    flag_magic: Option<String>,
-
+    flag_connect: Vec<String>,
-    /// The mode of the VPN ("normal", "router", "switch", or "hub")
+    flag_peer_timeout: Option<Duration>,
-    #[structopt(short, long)]
+    flag_keepalive: Option<Duration>,
-    mode: Option<Mode>,
+    flag_dst_timeout: Option<Duration>,
-
+    flag_beacon_store: Option<String>,
-    /// The shared key to encrypt all traffic
+    flag_beacon_load: Option<String>,
-    #[structopt(short, long, aliases=&["shared-key", "secret-key", "secret"])]
+    flag_beacon_interval: Option<Duration>,
-    key: Option<String>,
+    flag_verbose: bool,
-
+    flag_quiet: bool,
-    /// The encryption method to use ("aes256", or "chacha20")
+    flag_ifup: Option<String>,
-    #[structopt(long)]
+    flag_ifdown: Option<String>,
-    crypto: Option<CryptoMethod>,
+    flag_version: bool,
-
+    flag_no_port_forwarding: bool,
-    /// The local subnets to use
+    flag_daemon: bool,
-    #[structopt(short, long)]
+    flag_pid_file: Option<String>,
-    subnets: Vec<String>,
+    flag_stats_file: Option<String>,
-
+    flag_user: Option<String>,
-    /// Name of the virtual device
+    flag_group: Option<String>,
-    #[structopt(short, long)]
+    flag_log_file: Option<String>
    device: Option<String>,
    /// The port number (or ip:port) on which to listen for data
    #[structopt(short, long)]
    listen: Option<String>,
    /// Optional token that identifies the network. (DEPRECATED)
    #[structopt(long)]
    network_id: Option<String>,
    /// Override the 4-byte magic header of each packet
    #[structopt(long)]
    magic: Option<String>,
    /// Address of a peer to connect to
    #[structopt(short, long)]
    connect: Vec<String>,
    /// Peer timeout in seconds
    #[structopt(long)]
    peer_timeout: Option<Duration>,
    /// Periodically send message to keep connections alive
    #[structopt(long)]
    keepalive: Option<Duration>,
    /// Switch table entry timeout in seconds
    #[structopt(long)]
    dst_timeout: Option<Duration>,
    /// The file path or |command to store the beacon
    #[structopt(long)]
    beacon_store: Option<String>,
    /// The file path or |command to load the beacon
    #[structopt(long)]
    beacon_load: Option<String>,
    /// Beacon store/load interval in seconds
    #[structopt(long)]
    beacon_interval: Option<Duration>,
    /// Print debug information
    #[structopt(short, long, conflicts_with = "quiet")]
    verbose: bool,
    /// Only print errors and warnings
    #[structopt(short, long)]
    quiet: bool,
    /// A command to setup the network interface
    #[structopt(long)]
    ifup: Option<String>,
    /// A command to bring down the network interface
    #[structopt(long)]
    ifdown: Option<String>,
    /// Print the version and exit
    #[structopt(long)]
    version: bool,
    /// Disable automatic port forwarding
    #[structopt(long)]
    no_port_forwarding: bool,
    /// Run the process in the background
    #[structopt(long)]
    daemon: bool,
    /// Store the process id in this file when daemonizing
    #[structopt(long)]
    pid_file: Option<String>,
    /// Print statistics to this file
    #[structopt(long)]
    stats_file: Option<String>,
    /// Send statistics to this statsd server
    #[structopt(long)]
    statsd_server: Option<String>,
    /// Run as other user
    #[structopt(long)]
    user: Option<String>,
    /// Run as other group
    #[structopt(long)]
    group: Option<String>,
    /// Print logs also to this file
    #[structopt(long)]
    log_file: Option<String>
 }
 struct DualLogger {
@ -416,23 +326,23 @@ fn run<P: Protocol>(config: Config) {
 }
 fn main() {
-    let args: Args = Args::from_args();
+    let args: Args = Docopt::new(USAGE).and_then(|d| d.deserialize()).unwrap_or_else(|e| e.exit());
-    if args.version {
+    if args.flag_version {
        println!("VpnCloud v{}, protocol version {}", env!("CARGO_PKG_VERSION"), VERSION);
        return
    }
-    let logger = try_fail!(DualLogger::new(args.log_file.as_ref()), "Failed to open logfile: {}");
+    let logger = try_fail!(DualLogger::new(args.flag_log_file.as_ref()), "Failed to open logfile: {}");
    log::set_boxed_logger(Box::new(logger)).unwrap();
-    assert!(!args.verbose || !args.quiet);
+    assert!(!args.flag_verbose || !args.flag_quiet);
-    log::set_max_level(if args.verbose {
+    log::set_max_level(if args.flag_verbose {
        log::LevelFilter::Debug
-    } else if args.quiet {
+    } else if args.flag_quiet {
        log::LevelFilter::Error
    } else {
        log::LevelFilter::Info
    });
    let mut config = Config::default();
-    if let Some(ref file) = args.config {
+    if let Some(ref file) = args.flag_config {
        info!("Reading config file '{}'", file);
        let f = try_fail!(File::open(file), "Failed to open config file: {:?}");
        let config_file = try_fail!(serde_yaml::from_reader(f), "Failed to load config file: {:?}");
--- a/src/traffic.rs
+++ b/src/traffic.rs
@ -5,15 +5,10 @@
 use std::{
    collections::HashMap,
    io::{self, Write},
-    net::SocketAddr,
+    net::SocketAddr
    ops::AddAssign
 };
-use super::{
+use super::{cloud::Hash, types::Address, util::Bytes};
    cloud::Hash,
    types::Address,
    util::{addr_nice, Bytes}
 };
 #[derive(Default)]
@ -29,19 +24,6 @@ pub struct TrafficEntry {
    pub idle_periods: usize
 }
 impl AddAssign<&TrafficEntry> for TrafficEntry {
    fn add_assign(&mut self, other: &TrafficEntry) {
        self.out_bytes_total += other.out_bytes_total;
        self.out_packets_total += other.out_packets_total;
        self.out_bytes += other.out_bytes;
        self.out_packets += other.out_packets;
        self.in_bytes_total += other.in_bytes_total;
        self.in_packets_total += other.in_packets_total;
        self.in_bytes += other.in_bytes;
        self.in_packets += other.in_packets;
    }
 }
 impl TrafficEntry {
    #[inline]
    fn count_out(&mut self, bytes: usize) {
@ -76,8 +58,7 @@ impl TrafficEntry {
 #[derive(Default)]
 pub struct TrafficStats {
    peers: HashMap<SocketAddr, TrafficEntry, Hash>,
-    payload: HashMap<(Address, Address), TrafficEntry, Hash>,
+    payload: HashMap<(Address, Address), TrafficEntry, Hash>
    pub dropped: TrafficEntry
 }
 impl TrafficStats {
@ -101,14 +82,6 @@ impl TrafficStats {
        self.payload.entry((remote, local)).or_insert_with(TrafficEntry::default).count_in(bytes);
    }
    pub fn count_invalid_protocol(&mut self, bytes: usize) {
        self.dropped.count_in(bytes)
    }
    pub fn count_dropped_payload(&mut self, bytes: usize) {
        self.dropped.count_out(bytes)
    }
    pub fn period(&mut self, cleanup_idle: Option<usize>) {
        for entry in self.peers.values_mut() {
            entry.period();
@ -116,7 +89,6 @@ impl TrafficStats {
        for entry in self.payload.values_mut() {
            entry.period();
        }
        self.dropped.period();
        if let Some(periods) = cleanup_idle {
            self.peers.retain(|_, entry| entry.idle_periods < periods);
            self.payload.retain(|_, entry| entry.idle_periods < periods);
@ -131,73 +103,28 @@ impl TrafficStats {
        self.payload.iter()
    }
    pub fn total_peer_traffic(&self) -> TrafficEntry {
        let mut total = TrafficEntry::default();
        for e in self.peers.values() {
            total += e
        }
        total
    }
    pub fn total_payload_traffic(&self) -> TrafficEntry {
        let mut total = TrafficEntry::default();
        for e in self.payload.values() {
            total += e
        }
        total
    }
    #[inline]
    pub fn write_out<W: Write>(&self, out: &mut W) -> Result<(), io::Error> {
-        writeln!(out, "peer_traffic:")?;
+        writeln!(out, "Peer traffic:")?;
        let mut peers: Vec<_> = self.get_peer_traffic().collect();
        peers.sort_unstable_by_key(|(_, data)| (data.out_bytes + data.in_bytes));
        for (addr, data) in peers.iter().rev() {
-            writeln!(
+            writeln!(out, " - {}: in={}/s, out={}/s", addr, Bytes(data.in_bytes / 60), Bytes(data.out_bytes / 60))?;
                out,
                "  - peer: \"{}\"\n    in: {{ display: \"{}/s\", bytes: {}, packets: {} }}\n    out: {{ display: \"{}/s\", bytes: {}, packets: {} }}",
                addr_nice(**addr),
                Bytes(data.in_bytes / 60),
                data.in_bytes,
                data.in_packets,
                Bytes(data.out_bytes / 60),
                data.out_bytes,
                data.out_packets
            )?;
        }
        writeln!(out)?;
-        writeln!(out, "payload_traffic:")?;
+        writeln!(out, "Payload traffic:")?;
        let mut payload: Vec<_> = self.get_payload_traffic().collect();
        payload.sort_unstable_by_key(|(_, data)| (data.out_bytes + data.in_bytes));
        for ((remote, local), data) in payload.iter().rev() {
            writeln!(
                out,
-                "  - addrs: [\"{}\", \"{}\"]\n    in: {{ display: \"{}/s\", bytes: {}, packets: {} }}\n    out: {{ display: \"{}/s\", bytes: {}, packets: {} }}",
+                " - {} <-> {}: in={}/s, out={}/s",
                remote,
                local,
                Bytes(data.in_bytes / 60),
-                data.in_bytes,
+                Bytes(data.out_bytes / 60)
                data.in_packets,
                Bytes(data.out_bytes / 60),
                data.out_bytes,
                data.out_packets
            )?;
        }
        writeln!(out)?;
        writeln!(
            out,
            "invalid_protocol_traffic: {{ display: \"{}/s\", bytes: {}, packets: {} }}",
            Bytes(self.dropped.in_bytes / 60),
            self.dropped.in_bytes,
            self.dropped.in_packets
        )?;
        writeln!(
            out,
            "dropped_payload_traffic: {{ display: \"{}/s\", bytes: {}, packets: {} }}",
            Bytes(self.dropped.out_bytes / 60),
            self.dropped.out_bytes,
            self.dropped.out_packets
        )?;
        Ok(())
    }
 }
--- a/src/types.rs
+++ b/src/types.rs
@ -206,19 +206,6 @@ impl fmt::Display for Mode {
        }
    }
 }
 impl FromStr for Mode {
    type Err = &'static str;
    fn from_str(text: &str) -> Result<Self, Self::Err> {
        Ok(match &text.to_lowercase() as &str {
            "normal" => Self::Normal,
            "hub" => Self::Hub,
            "switch" => Self::Switch,
            "router" => Self::Router,
            _ => return Err("Unknown mode")
        })
    }
 }
 pub trait Table {
    fn learn(&mut self, _: Address, _: Option<u8>, _: SocketAddr);
@ -227,7 +214,6 @@ pub trait Table {
    fn write_out<W: Write>(&self, out: &mut W) -> Result<(), io::Error>;
    fn remove(&mut self, _: &Address) -> bool;
    fn remove_all(&mut self, _: &SocketAddr);
    fn len(&self) -> usize;
 }
 pub trait Protocol: Sized {
--- a/src/usage.txt
+++ b/src/usage.txt
@ -0,0 +1,43 @@
 Usage:
    vpncloud [options] [--config <file>] [-t <type>] [-d <name>] [-l <port>] [-c <addr>...] [-s <subnet>...]
 Options:
    --config <file>                 Read configuration options from the
                                    specified file.
    -t <type>, --type <type>        Set the type of network ("tap" or "tun").
    --device-path <path>            Set the path of the base device.
    -d <name>, --device <name>      Name of the virtual device.
    -m <mode>, --mode <mode>        The mode of the VPN ("hub", "switch",
                                    "router", or "normal").
    -l <port>, --listen <port>      The port number on which to listen for data.
    -c <addr>, --connect <addr>     Address of a peer to connect to.
    -s <subnet>, --subnet <subnet>    The local subnets to use.
    --magic <hex>                   Override the 4-byte magic header of each
                                    packet.
    --network-id <id>               Optional token that identifies the network.
                                    (DEPRECATED)
    --shared-key <key>              The shared key to encrypt all traffic.
    --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.
    --beacon-store <path|command>   The file or command to store the beacon.
    --beacon-load <path|command>    The file or command to load the beacon.
    --beacon-interval <secs>        Beacon store/load interval in seconds.
    --ifup <command>                A command to setup the network interface.
    --ifdown <command>              A command to bring down the network
                                    interface.
    --pid-file <file>               Store the process id in this file when
                                    daemonizing.
    --user <user>                   Run as other user.
    --group <group>                 Run as other group.
    --log-file <file>               Print logs also to this file.
    --stats-file <file>             Print statistics to this file.
    --no-port-forwarding            Disable automatic port forward.
    --daemon                        Run the process in the background.
    -v, --verbose                   Print debug information.
    -q, --quiet                     Only print errors and warnings.
    -h, --help                      Display the help.
    -V, --version                   Print the version and exit.
--- a/src/util.rs
+++ b/src/util.rs
@ -31,15 +31,6 @@ pub fn bytes_to_hex(bytes: &[u8]) -> String {
    s
 }
 pub fn addr_nice(addr: SocketAddr) -> SocketAddr {
    if let SocketAddr::V6(v6addr) = addr {
        if let Some(ip) = v6addr.ip().to_ipv4() {
            return (ip, addr.port()).into()
        }
    }
    addr
 }
 pub struct Encoder;