Initial commit

Has the super barebones of a server

State API is next I think

src/config.rs

@@ -0,0 +1,54 @@
+use std::fs::File;
+use std::io::{Read,self};
+use serde::{Serialize,Deserialize};
+use thiserror::Error;
+
+#[derive(Default,Clone,Serialize,Deserialize)]
+pub struct Config {
+    pub hostname: String,
+    pub port: u16,
+    pub listen_address: String,
+    pub database: DBConfig,
+    pub certfile: String,
+    pub keyfile: String,
+    
+}
+#[derive(Default,Clone,Serialize,Deserialize)]
+pub struct DBConfig {
+    pub url: String,
+    pub user: String,
+    pub password: String,
+}
+
+const LOCATIONS: [&'static str; 3] = [
+    "confetti.toml",
+    "~/.config/confetti/confetti.toml",
+    "/etc/confetti/confetti.toml"
+];
+
+impl Config {
+    pub fn load() -> Result<Config,ConfigError> {
+        for filename in LOCATIONS {
+            match File::open(filename) {
+                Ok(mut f) => {
+                    let mut buf = Vec::new();
+                    f.read_to_end(&mut buf)?;
+                    return Ok(toml::from_slice(&buf)?);
+                },
+                Err(_) => continue
+            }
+        }
+        Err(ConfigError::ConfigNotFound)
+    }
+}
+
+
+#[derive(Error, Debug)]
+pub enum ConfigError {
+    #[error("Unable to find config file. Create a confetti.toml to run the application")]
+    ConfigNotFound,
+    #[error("Error while parsing config file: {0:?}")]
+    ParseError(#[from] toml::de::Error),
+    #[error("IO Error detected while processing config file")]
+    IOError(#[from] io::Error),
+}

src/main.rs

@@ -0,0 +1,80 @@
+mod config;
+
+use diesel::{Connection,PgConnection};
+use quinn::rustls::pki_types::{PrivateKeyDer,CertificateDer,pem::PemObject};
+
+use std::net::{IpAddr,SocketAddr};
+use std::str::FromStr;
+use quinn::Endpoint;
+use tracing::{error,instrument};
+
+
+use std::process::ExitCode;
+use crate::config::Config;
+
+#[tokio::main]
+#[instrument]
+async fn main() -> ExitCode {
+    // Read in config
+    let config = match Config::load() {
+        Ok(c) => c,
+        Err(e) => {
+            error!("Problem while reading config file");
+            error!("{:?}",e);
+            return ExitCode::FAILURE;
+
+        }
+    };
+
+    // Set up database connection
+    let db_connection = PgConnection::establish(&config.database.url);
+
+
+    // Read certificate file
+    let certs = CertificateDer::pem_file_iter(&config.certfile)
+        .unwrap()
+        .map(|cert| cert.unwrap())
+        .collect();
+    let key = PrivateKeyDer::from_pem_file(&config.keyfile).unwrap();
+
+    let address = match IpAddr::from_str(&config.listen_address) {
+        Ok(val) => val,
+        Err(e) => {
+            error!("Could not parse IP address: {:?}",e);
+            return ExitCode::FAILURE;
+        }
+    };
+
+    let quinn_config = match quinn::ServerConfig::with_single_cert(certs, key){
+        Ok(val) => val,
+        Err(e) => {
+            error!("Unable to intialize quinn server configuration: {:?}",e);
+            return ExitCode::FAILURE;
+        }
+    };
+
+    // Bind this endpoint to a UDP socket on the given server address.
+    let endpoint = match Endpoint::server(
+        quinn_config,
+        SocketAddr::new(address,config.port)
+    ) {
+        Ok(val) => val,
+        Err(e) => {
+            error!("Could not create incoming socket");
+            error!("{:?}",e);
+            return ExitCode::FAILURE;
+        }
+    };
+
+
+    // Start iterating over incoming connections.
+    while let Some(conn) = endpoint.accept().await {
+        let connection = conn.await;
+
+        // Save connection somewhere, start transferring, receiving data, see DataTransfer tutorial.
+    }
+
+    // Should never reach this
+    // How should I gracefully shutdown? Can I trap ctrlc
+    ExitCode::SUCCESS
+}