commit d82b4969376d8f92b59bb23b4341c8aab17156f6
Author: Aram Peres <aram.peres@wavy.fm>
Date:   Sun Oct 10 17:52:10 2021 -0400

    Initial commit

diff --git a/.gitignore b/.gitignore
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index 0000000..6adbcee
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..3e126c1
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,13 @@
+[package]
+name = "onetun"
+version = "0.1.0"
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+boringtun = { git = "https://github.com/aramperes/boringtun.git", branch = "onetun" }
+clap = { version = "2.33", default-features = false, features = ["suggestions"] }
+log = "0.4"
+pretty_env_logger = "0.3"
+anyhow = "1"
diff --git a/src/config.rs b/src/config.rs
new file mode 100644
index 0000000..3c67a0d
--- /dev/null
+++ b/src/config.rs
@@ -0,0 +1,105 @@
+use anyhow::Context;
+use std::net::{IpAddr, SocketAddr};
+use std::sync::Arc;
+
+use boringtun::crypto::{X25519PublicKey, X25519SecretKey};
+use clap::{App, Arg};
+
+#[derive(Clone, Debug)]
+pub(crate) struct Config {
+    pub(crate) source_addr: SocketAddr,
+    pub(crate) dest_addr: SocketAddr,
+    pub(crate) private_key: Arc<X25519SecretKey>,
+    pub(crate) endpoint_public_key: Arc<X25519PublicKey>,
+    pub(crate) endpoint_addr: SocketAddr,
+    pub(crate) source_peer_ip: IpAddr,
+}
+
+impl Config {
+    pub fn from_args() -> anyhow::Result<Self> {
+        let matches = App::new("onetun")
+            .author("Aram Peres <aram.peres@gmail.com>")
+            .version(env!("CARGO_PKG_VERSION"))
+            .args(&[
+                Arg::with_name("SOURCE_ADDR")
+                    .required(true)
+                    .takes_value(true)
+                    .env("ONETUN_SOURCE_ADDR")
+                    .help("The source address (IP + port) to forward from. Example: 127.0.0.1:2115"),
+                Arg::with_name("DESTINATION_ADDR")
+                    .required(true)
+                    .takes_value(true)
+                    .env("ONETUN_DESTINATION_ADDR")
+                    .help("The destination address (IP + port) to forward to. The IP should be a peer registered in the Wireguard endpoint. Example: 192.168.4.2:2116"),
+                Arg::with_name("private-key")
+                    .required(true)
+                    .takes_value(true)
+                    .long("private-key")
+                    .env("ONETUN_PRIVATE_KEY")
+                    .help("The private key of this peer. The corresponding public key should be registered in the Wireguard endpoint."),
+                Arg::with_name("endpoint-public-key")
+                    .required(true)
+                    .takes_value(true)
+                    .long("endpoint-public-key")
+                    .env("ONETUN_ENDPOINT_PUBLIC_KEY")
+                    .help("The public key of the Wireguard endpoint (remote)."),
+                Arg::with_name("endpoint-addr")
+                    .required(true)
+                    .takes_value(true)
+                    .long("endpoint-addr")
+                    .env("ONETUN_ENDPOINT_ADDR")
+                    .help("The address (IP + port) of the Wireguard endpoint (remote). Example: 1.2.3.4:51820"),
+                Arg::with_name("source-peer-ip")
+                    .required(true)
+                    .takes_value(true)
+                    .long("source-peer-ip")
+                    .env("ONETUN_SOURCE_PEER_IP")
+                    .help("The source IP to identify this peer as (local). Example: 192.168.4.3")
+            ]).get_matches();
+
+        Ok(Self {
+            source_addr: parse_addr(matches.value_of("SOURCE_ADDR"))
+                .with_context(|| "Invalid source address")?,
+            dest_addr: parse_addr(matches.value_of("DESTINATION_ADDR"))
+                .with_context(|| "Invalid destination address")?,
+            private_key: Arc::new(
+                parse_private_key(matches.value_of("private-key"))
+                    .with_context(|| "Invalid private key")?,
+            ),
+            endpoint_public_key: Arc::new(
+                parse_public_key(matches.value_of("endpoint-public-key"))
+                    .with_context(|| "Invalid endpoint public key")?,
+            ),
+            endpoint_addr: parse_addr(matches.value_of("endpoint-addr"))
+                .with_context(|| "Invalid endpoint address")?,
+            source_peer_ip: parse_ip(matches.value_of("source-peer-ip"))
+                .with_context(|| "Invalid source peer IP")?,
+        })
+    }
+}
+
+fn parse_addr(s: Option<&str>) -> anyhow::Result<SocketAddr> {
+    s.with_context(|| "Missing address")?
+        .parse::<SocketAddr>()
+        .with_context(|| "Invalid address")
+}
+
+fn parse_ip(s: Option<&str>) -> anyhow::Result<IpAddr> {
+    s.with_context(|| "Missing IP")?
+        .parse::<IpAddr>()
+        .with_context(|| "Invalid IP address")
+}
+
+fn parse_private_key(s: Option<&str>) -> anyhow::Result<X25519SecretKey> {
+    s.with_context(|| "Missing private key")?
+        .parse::<X25519SecretKey>()
+        .map_err(|e| anyhow::anyhow!("{}", e))
+        .with_context(|| "Invalid private key")
+}
+
+fn parse_public_key(s: Option<&str>) -> anyhow::Result<X25519PublicKey> {
+    s.with_context(|| "Missing public key")?
+        .parse::<X25519PublicKey>()
+        .map_err(|e| anyhow::anyhow!("{}", e))
+        .with_context(|| "Invalid public key")
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..dc91469
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,27 @@
+#[macro_use]
+extern crate log;
+
+use std::net::UdpSocket;
+use std::sync::Arc;
+
+use anyhow::Context;
+use boringtun::crypto::{X25519PublicKey, X25519SecretKey};
+use boringtun::device::peer::Peer;
+use boringtun::noise::Tunn;
+use clap::{App, Arg};
+
+use crate::config::Config;
+
+mod config;
+
+fn main() -> anyhow::Result<()> {
+    pretty_env_logger::init_custom_env("ONETUN_LOG");
+    let config = Config::from_args().with_context(|| "Failed to read config")?;
+    debug!("Parsed arguments: {:?}", config);
+
+    // TODO
+    // 1. Listen on source addr (sA) -> encapsulate packets with peer IP -> send to endpoint IP (sB)
+    // 2. Connect to endpoint IP (sB) -> decapsulate packets -> send to source addr (sA)
+
+    Ok(())
+}