Release version 0.1.10

Signed-off-by: Jacob Kiers <code@kiers.eu>

.drone.jsonnet

@@ -1,5 +1,5 @@
 local executableName = 'l4p';
-local build_image = 'img.kie.rs/jjkiers/rust-cross:rust1.71.1-zig';
+local build_image = 'img.kie.rs/jjkiers/rust-crossbuild:rust1.79.0-zig0.11.0-zig';
 
 local archs = [
   { target: 'aarch64-unknown-linux-musl', short: 'arm64-musl' },

.gitignore

@@ -1,2 +1,4 @@
+/.idea
+/.vscode
 /target
 config.yaml

CHANGELOG.md

@@ -0,0 +1,55 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [0.1.10] - 2025-01-09
+
+### Fixed
+
+* The ClientHello TLS header is now read in full before it is parsed, solving
+  an error where there was not enough data to fully read it. In those cases
+  it was not possible to determine the upstream address and therefore the proxy
+  would go the the default action instead.
+
+### Changed
+
+* Updated some dependencies to prevent the build from breaking.
+
+## [0.1.9] - 2024-06-22
+
+### Deprecated
+
+The ability to run `l4p` without arguments is now deprecated. Please use 
+`l4p serve` going forward.
+
+### Added
+
+* Added self update functionality. Just run `l4p update` to use it.
+* Now keeping a change log in the `CHANGELOG.md` file.
+
+### Changed
+
+* Updated build pipeline to generate much smaller binaries
+
+-------
+
+## Previous versions
+
+[unreleased]: https://code.kiers.eu/jjkiers/layer4-proxy/compare/v0.1.9...HEAD
+[0.1.10]: https://code.kiers.eu/jjkiers/layer4-proxy/compare/v0.1.9...v0.1.10
+[0.1.9]: https://code.kiers.eu/jjkiers/layer4-proxy/compare/v0.1.8...v0.1.9
+
+
+Types of changes:
+
+* `Added` for new features.
+* `Changed` for changes in existing functionality.
+* `Deprecated` for soon-to-be removed features.
+* `Removed` for now removed features.
+* `Fixed` for any bug fixes.
+* `Security` in case of vulnerabilities.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "l4p"
-version = "0.1.8"
+version = "0.1.10"
 edition = "2021"
 authors = ["Jacob Kiers <code@kiers.eu>"]
 license = "Apache-2.0"
@@ -25,10 +25,16 @@ byte_string = "1"
 bytes = "1.1"
 futures = "0.3"
 log = "0.4"
+pico-args = "0.5.0"
 pretty_env_logger = "0.5"
 serde = { version = "1.0", features = ["derive"] }
 serde_yaml = "0.9.21"
-time = { version = "0.3.1", features = ["local-offset", "formatting"] }
-tls-parser = "0.11"
+time = { version = "0.3.37", features = ["local-offset", "formatting"] }
+tls-parser = "0.12.2"
 tokio = { version = "1.0", features = ["full"] }
 url = "2.2.2"
+
+[dependencies.self_update]
+version = "0.42.0"
+default-features = false
+features = ["rustls"]

README.md

@@ -57,7 +57,7 @@ For detailed configuration, check [this example](./config.yaml.example).
 
 ## Thanks
 
-- [`l4p`](https://crates.io/crates/`l4p`), of which this is a heavily modified fork.
+- [`fourth`](https://crates.io/crates/fourth), of which this is a heavily modified fork.
 
 ## License
 

src/main.rs

@@ -1,14 +1,52 @@
 mod config;
 mod servers;
+mod update;
 mod upstreams;
 
 use crate::config::ConfigV1;
 use crate::servers::Server;
+use std::io::{stderr, stdout, Write};
 
-use log::{debug, error, info};
+use log::{debug, error};
+use pico_args::Arguments;
 use std::path::PathBuf;
 
 fn main() {
+    let mut args = Arguments::from_env();
+
+    match args.subcommand().expect("Unexpected error").as_deref() {
+        Some("serve") => serve(),
+        Some("update") => update::update(),
+        Some("help") => {
+            let _ = print_usage(&mut stdout().lock());
+        }
+        Some(cmd) => {
+            eprintln!("Invalid command: {cmd}");
+            std::process::exit(1);
+        }
+        None => {
+            eprintln!("Calling l4p without argument is deprecated now. Please use: l4p serve");
+            let _ = print_usage(&mut stderr().lock());
+            serve();
+        }
+    }
+}
+
+fn print_usage(out: &mut dyn Write) -> std::io::Result<()> {
+    writeln!(
+        out,
+        "{} v{}",
+        env!("CARGO_PKG_NAME"),
+        env!("CARGO_PKG_VERSION")
+    )?;
+    writeln!(out, "Usage:")?;
+    writeln!(out, "\tupdate\tUpdate l4p to the latest version")?;
+    writeln!(out, "\tserve\tServe the proxy")?;
+    writeln!(out, "\thelp\tPrint this message")?;
+    Ok(())
+}
+
+fn serve() {
     let config_path = match find_config() {
         Ok(p) => p,
         Err(paths) => {

src/servers/protocol/tcp.rs

@@ -1,4 +1,4 @@
-use crate::servers::protocol::tls::get_sni;
+use crate::servers::protocol::tls::determine_upstream_name;
 use crate::servers::Proxy;
 use log::{debug, error, info, warn};
 use std::error::Error;
@@ -35,29 +35,7 @@ async fn accept(inbound: TcpStream, proxy: Arc<Proxy>) -> Result<(), Box<dyn Err
 
     let upstream_name = match proxy.tls {
         false => proxy.default_action.clone(),
-        true => {
-            let mut hello_buf = [0u8; 1024];
-            inbound.peek(&mut hello_buf).await?;
-            let snis = get_sni(&hello_buf);
-            if snis.is_empty() {
-                proxy.default_action.clone()
-            } else {
-                match proxy.sni.clone() {
-                    Some(sni_map) => {
-                        let mut upstream = proxy.default_action.clone();
-                        for sni in snis {
-                            let m = sni_map.get(&sni);
-                            if m.is_some() {
-                                upstream = m.unwrap().clone();
-                                break;
-                            }
-                        }
-                        upstream
-                    }
-                    None => proxy.default_action.clone(),
-                }
-            }
-        }
+        true => determine_upstream_name(&inbound, &proxy).await?,
     };
 
     debug!("Upstream: {}", upstream_name);

src/servers/protocol/tls.rs

@@ -1,10 +1,14 @@
-use log::{debug, warn};
+use crate::servers::Proxy;
+use log::{debug, error, trace, warn};
+use std::error::Error;
+use std::sync::Arc;
 use tls_parser::{
     parse_tls_extensions, parse_tls_raw_record, parse_tls_record_with_header, TlsMessage,
     TlsMessageHandshake,
 };
+use tokio::net::TcpStream;
 
-pub fn get_sni(buf: &[u8]) -> Vec<String> {
+fn get_sni(buf: &[u8]) -> Vec<String> {
     let mut snis: Vec<String> = Vec::new();
     match parse_tls_raw_record(buf) {
         Ok((_, ref r)) => match parse_tls_record_with_header(r.data, &r.hdr) {
@@ -53,10 +57,119 @@ pub fn get_sni(buf: &[u8]) -> Vec<String> {
     snis
 }
 
+pub(crate) async fn determine_upstream_name(
+    inbound: &TcpStream,
+    proxy: &Arc<Proxy>,
+) -> Result<String, Box<dyn Error>> {
+    let default_upstream = proxy.default_action.clone();
+
+    let mut header = [0u8; 9];
+    inbound.peek(&mut header).await?;
+
+    let required_bytes = client_hello_buffer_size(&header)?;
+
+    let mut hello_buf = vec![0; required_bytes];
+    let read_bytes = inbound.peek(&mut hello_buf).await?;
+
+    if read_bytes < required_bytes.into() {
+        error!("Could not read enough bytes to determine SNI");
+        return Ok(default_upstream);
+    }
+
+    let snis = get_sni(&hello_buf);
+    if snis.is_empty() {
+        return Ok(default_upstream);
+    } else {
+        match proxy.sni.clone() {
+            Some(sni_map) => {
+                let mut upstream = default_upstream;
+                for sni in snis {
+                    let m = sni_map.get(&sni);
+                    if m.is_some() {
+                        upstream = m.unwrap().clone();
+                        break;
+                    }
+                }
+                Ok(upstream)
+            }
+            None => return Ok(default_upstream),
+        }
+    }
+}
+
+fn client_hello_buffer_size(data: &[u8]) -> Result<usize, String> {
+    // TLS record header
+    // -----------------
+    // byte   0: rec type (should be 0x16 == Handshake)
+    // byte 1-2: version (should be 0x3000 < v < 0x3003)
+    // byte 3-4: rec len
+
+    if data.len() < 9 {
+        trace!("Not enough bytes to even check the TLS header.");
+        return Err("Not enough bytes to even check the TLS header.".into());
+    }
+
+    if data[0] != 0x16 {
+        trace!("Not a TLS handshake.");
+        return Err("Not a TLS handshake.".into());
+    }
+
+    // Check the record length
+    let record_length = ((data[3] as u16) << 8) | (data[4] as u16);
+    if record_length == 0 || record_length > 16384 {
+        trace!("Client send invalid header: way too long record header.");
+        return Err("Client send invalid header: way too long record header.".into());
+    }
+
+    // Handshake record header
+    // -----------------------
+    // byte   5: hs msg type (should be 0x01 == client_hello)
+    // byte 6-8: hs msg len
+
+    if data[5] != 0x01 {
+        trace!("Not a ClientHello message");
+        return Err("Not a ClientHello message".into());
+    }
+
+    // Check the handshake message length
+    let handshake_length =
+        ((data[6] as usize) << 16) | ((data[7] as usize) << 8) | (data[8] as usize);
+
+    if handshake_length <= 0 || handshake_length > (record_length - 4).into() {
+        warn!("Invalid client hello length (fragmentation not implemented)");
+        return Err("Invalid client hello length (fragmentation not implemented)".into());
+    }
+
+    // Calculate the handshake length and return it
+    Ok(handshake_length + 9)
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
 
+    #[test]
+    fn test_too_little_data_end() {
+        let length = client_hello_buffer_size(&TOO_LITTLE_DATA_END);
+
+        if length.is_ok() {
+            assert!(false);
+        }
+
+        let msg = length.unwrap_err();
+        dbg!(msg);
+
+        assert!(true);
+    }
+
+    #[test]
+    fn test_too_little_data_start() {
+        let length = client_hello_buffer_size(&TOO_LITTLE_DATA_START);
+
+        assert!(length.is_ok());
+        assert_eq!(1712, length.unwrap())
+    }
+
     #[test]
     fn test_sni_extract() {
         const BUF: [u8; 517] = [
@@ -99,6 +212,454 @@ mod tests {
             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
         ];
         let sni = get_sni(&BUF);
-        assert!(sni[0] == *"www.lirui.tech");
+        assert_eq!(sni[0], *"www.lirui.tech");
     }
+
+    #[test]
+    fn test_sni_extract_tiny() {
+        const BUF: [u8; 1712] = [
+            0x16, 0x03, 0x01, 0x06, 0xab, 0x01, 0x00, 0x06, // |........|
+            0xa7, 0x03, 0x03, 0x84, 0x53, 0xb2, 0xd7, 0x37, // |....S..7|
+            0xcd, 0x27, 0xda, 0xf4, 0x70, 0xd8, 0x78, 0x26, // |.'..p.x&|
+            0x34, 0x7f, 0xe3, 0xa7, 0x5d, 0xfe, 0x97, 0x29, // |4...]..)|
+            0x89, 0x29, 0xa2, 0xd8, 0x62, 0x05, 0x7b, 0x13, // |.)..b.{.|
+            0xcf, 0x4b, 0x13, 0x20, 0x5b, 0x74, 0x4e, 0x23, // |.K. [tN#|
+            0x90, 0x08, 0x5a, 0x43, 0xbf, 0xe0, 0x0d, 0xeb, // |..ZC....|
+            0x8a, 0xc8, 0x4d, 0x14, 0x1e, 0x35, 0x43, 0x04, // |..M..5C.|
+            0x36, 0x32, 0xdc, 0x71, 0xff, 0xcc, 0xb3, 0x5b, // |62.q...[|
+            0x63, 0x4b, 0x2b, 0xee, 0x00, 0x20, 0xba, 0xba, // |cK+.. ..|
+            0x13, 0x01, 0x13, 0x02, 0x13, 0x03, 0xc0, 0x2b, // |.......+|
+            0xc0, 0x2f, 0xc0, 0x2c, 0xc0, 0x30, 0xcc, 0xa9, // |./.,.0..|
+            0xcc, 0xa8, 0xc0, 0x13, 0xc0, 0x14, 0x00, 0x9c, // |........|
+            0x00, 0x9d, 0x00, 0x2f, 0x00, 0x35, 0x01, 0x00, // |.../.5..|
+            0x06, 0x3e, 0x7a, 0x7a, 0x00, 0x00, 0x00, 0x0a, // |.>zz....|
+            0x00, 0x0c, 0x00, 0x0a, 0xda, 0xda, 0x11, 0xec, // |........|
+            0x00, 0x1d, 0x00, 0x17, 0x00, 0x18, 0xff, 0x01, // |........|
+            0x00, 0x01, 0x00, 0x00, 0x17, 0x00, 0x00, 0x00, // |........|
+            0x00, 0x00, 0x13, 0x00, 0x11, 0x00, 0x00, 0x0e, // |........|
+            0x68, 0x61, 0x2e, 0x68, 0x6f, 0x6d, 0x65, 0x2e, // |ha.home.|
+            0x6b, 0x69, 0x65, 0x2e, 0x72, 0x73, 0xfe, 0x0d, // |kie.rs..|
+            0x00, 0xba, 0x00, 0x00, 0x01, 0x00, 0x01, 0x11, // |........|
+            0x00, 0x20, 0xf7, 0xf4, 0x20, 0xc8, 0xb7, 0xeb, // |. .. ...|
+            0xf1, 0x2d, 0x8b, 0x30, 0x2c, 0xc8, 0x5e, 0xd3, // |.-.0,.^.|
+            0xa3, 0x02, 0x38, 0xf2, 0x41, 0xf7, 0x3f, 0x2d, // |..8.A.?-|
+            0xb4, 0xf0, 0xd7, 0x3b, 0xe5, 0x19, 0x3f, 0xc3, // |...;..?.|
+            0xae, 0x1f, 0x00, 0x90, 0x27, 0x8d, 0x4c, 0xc9, // |....'.L.|
+            0xb3, 0xd1, 0x63, 0x20, 0xe4, 0x33, 0x18, 0x56, // |..c .3.V|
+            0xd5, 0x9b, 0xd5, 0xf9, 0xf2, 0x94, 0x1d, 0xe4, // |........|
+            0xa6, 0x88, 0x47, 0xd2, 0x85, 0x4f, 0xf4, 0x30, // |..G..O.0|
+            0x22, 0xff, 0x67, 0x80, 0x60, 0x33, 0x17, 0xa0, // |".g.`3..|
+            0x4f, 0xdb, 0x98, 0x53, 0x00, 0xa4, 0xc8, 0x89, // |O..S....|
+            0xb8, 0x1b, 0x3f, 0xbd, 0xdf, 0xeb, 0x48, 0x1a, // |..?...H.|
+            0xa1, 0x33, 0xd7, 0xc1, 0x8d, 0x76, 0xf2, 0xcf, // |.3...v..|
+            0xbe, 0x30, 0x1d, 0xcd, 0x3a, 0xfe, 0xf1, 0xb0, // |.0..:...|
+            0x86, 0xbc, 0x28, 0x74, 0x78, 0xa1, 0x9a, 0x60, // |..(tx..`|
+            0x14, 0xfe, 0x12, 0x92, 0x4d, 0xb5, 0x9e, 0x85, // |....M...|
+            0x79, 0x62, 0x9c, 0x68, 0x73, 0xc6, 0x0e, 0xe5, // |yb.hs...|
+            0xad, 0x5b, 0xe2, 0x69, 0x00, 0xc0, 0x26, 0x24, // |.[.i..&$|
+            0x88, 0xfa, 0x22, 0x29, 0x36, 0x7b, 0x16, 0x59, // |..")6{.Y|
+            0x48, 0xbe, 0xf9, 0x1c, 0x86, 0x55, 0xcb, 0x67, // |H....U.g|
+            0xae, 0xb6, 0x7b, 0x69, 0x3e, 0xd0, 0x48, 0x31, // |..{i>.H1|
+            0x58, 0x8a, 0xd8, 0xba, 0x06, 0x21, 0xf0, 0xd4, // |X....!..|
+            0x4e, 0xef, 0xcf, 0x67, 0xc5, 0x63, 0x97, 0x59, // |N..g.c.Y|
+            0x95, 0x12, 0x47, 0x90, 0x00, 0x2d, 0x00, 0x02, // |..G..-..|
+            0x01, 0x01, 0x00, 0x10, 0x00, 0x0b, 0x00, 0x09, // |........|
+            0x08, 0x68, 0x74, 0x74, 0x70, 0x2f, 0x31, 0x2e, // |.http/1.|
+            0x31, 0x00, 0x0d, 0x00, 0x12, 0x00, 0x10, 0x04, // |1.......|
+            0x03, 0x08, 0x04, 0x04, 0x01, 0x05, 0x03, 0x08, // |........|
+            0x05, 0x05, 0x01, 0x08, 0x06, 0x06, 0x01, 0x00, // |........|
+            0x2b, 0x00, 0x07, 0x06, 0x0a, 0x0a, 0x03, 0x04, // |+.......|
+            0x03, 0x03, 0x00, 0x23, 0x00, 0x00, 0x00, 0x12, // |...#....|
+            0x00, 0x00, 0x00, 0x1b, 0x00, 0x03, 0x02, 0x00, // |........|
+            0x02, 0x00, 0x33, 0x04, 0xef, 0x04, 0xed, 0xda, // |..3.....|
+            0xda, 0x00, 0x01, 0x00, 0x11, 0xec, 0x04, 0xc0, // |........|
+            0xc6, 0x12, 0x85, 0x0b, 0xba, 0x73, 0x9d, 0x00, // |.....s..|
+            0x29, 0x08, 0x40, 0x3a, 0xb8, 0xfc, 0x9e, 0x99, // |).@:....|
+            0x25, 0xbd, 0x60, 0xb6, 0x8a, 0x56, 0x51, 0xac, // |%.`..VQ.|
+            0x38, 0xa3, 0x15, 0x37, 0x21, 0x80, 0x86, 0x02, // |8..7!...|
+            0xb2, 0x10, 0x4b, 0x29, 0xeb, 0x37, 0x04, 0x47, // |..K).7.G|
+            0x16, 0x12, 0x0e, 0x63, 0x2d, 0x32, 0xf6, 0x2a, // |...c-2.*|
+            0x86, 0x09, 0x7b, 0x41, 0x28, 0x8c, 0xcf, 0xfa, // |..{A(...|
+            0x08, 0x2e, 0x0c, 0xb2, 0x55, 0xb4, 0xb4, 0xd2, // |....U...|
+            0x76, 0x38, 0x47, 0x44, 0x78, 0xf0, 0x01, 0xb6, // |v8GDx...|
+            0xee, 0xf0, 0x1f, 0x4b, 0xc5, 0x6b, 0xb3, 0x93, // |...K.k..|
+            0x4d, 0xa5, 0x25, 0x29, 0xda, 0x33, 0x1e, 0xc5, // |M.%).3..|
+            0x15, 0x98, 0xf5, 0x41, 0x3e, 0xd2, 0xf7, 0x82, // |...A>...|
+            0xd7, 0xbb, 0x56, 0xf0, 0x86, 0x29, 0xa3, 0x56, // |..V..).V|
+            0x25, 0xdc, 0xaa, 0x03, 0xaa, 0x28, 0xa7, 0x2b, // |%....(.+|
+            0xc0, 0x41, 0xca, 0x66, 0x3e, 0xcc, 0x21, 0x40, // |.A.f>.!@|
+            0x60, 0x34, 0x5f, 0x9f, 0x69, 0x37, 0xac, 0x30, // |`4_.i7.0|
+            0x06, 0x7a, 0xf9, 0x26, 0xfe, 0x3c, 0x13, 0x05, // |.z.&.<..|
+            0xf6, 0xbe, 0x5f, 0x0c, 0x9a, 0x43, 0x18, 0xa2, // |.._..C..|
+            0xd9, 0xc5, 0xa0, 0x06, 0x0b, 0x0a, 0x21, 0xf1, // |......!.|
+            0x6b, 0x12, 0x4a, 0x5d, 0xec, 0xf6, 0x01, 0x30, // |k.J]...0|
+            0xb6, 0x3b, 0x34, 0x62, 0xcd, 0x5a, 0x6a, 0x26, // |.;4b.Zj&|
+            0x08, 0x98, 0xc9, 0xd0, 0x8a, 0x49, 0x94, 0x07, // |.....I..|
+            0x48, 0x45, 0x78, 0x45, 0xae, 0x24, 0x2b, 0x83, // |HExE.$+.|
+            0xb6, 0x69, 0x6c, 0x20, 0x33, 0xa9, 0xc4, 0x8e, // |.il 3...|
+            0xe7, 0x1a, 0x90, 0x28, 0xc6, 0x3f, 0x16, 0xf2, // |...(.?..|
+            0xae, 0x3e, 0x22, 0x17, 0x26, 0x9c, 0x38, 0xf5, // |.>".&.8.|
+            0x88, 0x60, 0x79, 0x16, 0x28, 0xce, 0x05, 0x72, // |.`y.(..r|
+            0x2f, 0x64, 0x99, 0xdd, 0x8c, 0x5b, 0xa6, 0xe2, // |/d...[..|
+            0x65, 0x8a, 0xe2, 0x8d, 0xb6, 0x24, 0x9e, 0x6d, // |e....$.m|
+            0x5a, 0x70, 0xfd, 0xea, 0xca, 0xec, 0x77, 0x46, // |Zp....wF|
+            0x20, 0xa8, 0x1f, 0x78, 0xf6, 0x34, 0x52, 0x13, // | ..x.4R.|
+            0x97, 0xef, 0x60, 0xb9, 0xe5, 0xc6, 0x85, 0xf2, // |..`.....|
+            0x84, 0x64, 0xdc, 0x08, 0x07, 0xe2, 0x63, 0xa6, // |.d....c.|
+            0x23, 0x64, 0x54, 0xb8, 0x72, 0xac, 0x23, 0xda, // |#dT.r.#.|
+            0x8f, 0x73, 0xe4, 0x9b, 0x80, 0x77, 0x66, 0x3f, // |.s...wf?|
+            0x69, 0x34, 0xc4, 0xfb, 0x45, 0x3d, 0x1c, 0xa7, // |i4..E=..|
+            0x86, 0x98, 0x2e, 0xb4, 0xe0, 0x84, 0xb6, 0x47, // |.......G|
+            0x78, 0xeb, 0x2b, 0x10, 0x17, 0x45, 0x8a, 0xcf, // |x.+..E..|
+            0xea, 0xb5, 0x58, 0x42, 0x93, 0xbe, 0x4b, 0xad, // |..XB..K.|
+            0xfb, 0x28, 0x11, 0x12, 0xe0, 0x7c, 0x3d, 0x34, // |.(...|=4|
+            0x8c, 0x82, 0x07, 0x84, 0xda, 0x8b, 0x35, 0x86, // |......5.|
+            0x37, 0x35, 0x1d, 0x1a, 0xa2, 0xbf, 0x0a, 0xb4, // |75......|
+            0x8e, 0xf0, 0x91, 0xc4, 0xa8, 0x3f, 0x38, 0x03, // |.....?8.|
+            0x37, 0xc1, 0x9a, 0x94, 0x43, 0x09, 0x57, 0xee, // |7...C.W.|
+            0xaa, 0xcb, 0x3d, 0x13, 0xa2, 0x33, 0xd1, 0x04, // |..=..3..|
+            0x2c, 0x6c, 0xb4, 0x1c, 0x86, 0x07, 0x0c, 0x3c, // |,l.....<|
+            0x5c, 0xc9, 0x8c, 0xc8, 0x1a, 0x85, 0xa6, 0xdd, // |\.......|
+            0xd3, 0xc5, 0xae, 0x84, 0x4d, 0xfe, 0xa2, 0x99, // |....M...|
+            0xd3, 0x0b, 0x1f, 0x43, 0x01, 0xa6, 0x7b, 0xb2, // |...C..{.|
+            0x5b, 0xd5, 0xa0, 0x3e, 0xd4, 0x6c, 0x65, 0x75, // |[..>.leu|
+            0x55, 0x28, 0x4d, 0x1c, 0x28, 0x86, 0xda, 0x94, // |U(M.(...|
+            0xbe, 0x0a, 0x99, 0x61, 0xa4, 0x88, 0xd9, 0x6a, // |...a...j|
+            0x20, 0x1d, 0x78, 0x45, 0x5f, 0x66, 0xcc, 0x8c, // | .xE_f..|
+            0xe1, 0xba, 0x4c, 0x51, 0x99, 0x54, 0x27, 0x77, // |..LQ.T'w|
+            0xb4, 0x84, 0x61, 0x4e, 0xf9, 0x90, 0x6f, 0x19, // |..aN..o.|
+            0x44, 0x93, 0x27, 0x1d, 0x95, 0x82, 0x74, 0x7f, // |D.'...t.|
+            0x35, 0xaf, 0x04, 0xe4, 0x58, 0x41, 0x3a, 0x51, // |5...XA:Q|
+            0x0b, 0x22, 0x45, 0xaf, 0x44, 0x2a, 0xe9, 0xa3, // |."E.D*..|
+            0x71, 0x65, 0x15, 0x22, 0xea, 0x40, 0x10, 0xaf, // |qe.".@..|
+            0x5b, 0x27, 0xfc, 0x02, 0x00, 0x23, 0xa3, 0x70, // |['...#.p|
+            0xa9, 0x6c, 0xa7, 0xf7, 0x29, 0x5c, 0x75, 0x9b, // |.l..)\u.|
+            0x4c, 0x23, 0x14, 0x51, 0x12, 0x62, 0x71, 0xbb, // |L#.Q.bq.|
+            0x75, 0x64, 0x65, 0xb3, 0xaa, 0x1e, 0x10, 0x14, // |ude.....|
+            0xbf, 0xd0, 0x8b, 0xe0, 0xe4, 0x51, 0x6e, 0xa8, // |.....Qn.|
+            0x1a, 0x95, 0x21, 0xa9, 0x9f, 0xf7, 0x2a, 0xac, // |..!...*.|
+            0x5c, 0x1c, 0x12, 0xac, 0x9d, 0xac, 0x57, 0x14, // |\.....W.|
+            0x27, 0xaa, 0xa7, 0xee, 0xc3, 0x9d, 0x63, 0x48, // |'.....cH|
+            0x0e, 0xd7, 0xf8, 0x92, 0x9f, 0x28, 0xb9, 0x82, // |.....(..|
+            0x71, 0x99, 0xa1, 0xcb, 0x69, 0x0c, 0x29, 0x7d, // |q...i.)}|
+            0x67, 0x73, 0xae, 0x9d, 0xd7, 0xc7, 0x51, 0x7a, // |gs....Qz|
+            0x2c, 0x3a, 0x74, 0x89, 0x7d, 0x76, 0x35, 0xb5, // |,:t.}v5.|
+            0x97, 0x73, 0x4a, 0xfc, 0x29, 0x9a, 0x1a, 0x06, // |.sJ.)...|
+            0x2f, 0xd0, 0x89, 0x32, 0xfc, 0x3b, 0x17, 0xec, // |/..2.;..|
+            0x7a, 0xb5, 0x3c, 0x66, 0x0f, 0x43, 0x55, 0x41, // |z.<f.CUA|
+            0x49, 0x3f, 0xbf, 0xa1, 0x6f, 0x8a, 0x05, 0x76, // |I?..o..v|
+            0xd4, 0x02, 0x33, 0x52, 0x78, 0xc8, 0x08, 0xe9, // |..3Rx...|
+            0x49, 0xb8, 0x42, 0x05, 0xed, 0x34, 0x0a, 0xb1, // |I.B..4..|
+            0xa8, 0x32, 0x00, 0x6b, 0x00, 0x42, 0x56, 0x8a, // |.2.k.BV.|
+            0xe9, 0x04, 0x7a, 0xac, 0xc8, 0x72, 0x7f, 0x40, // |..z..r.@|
+            0x4c, 0xd6, 0xa9, 0x34, 0x0b, 0xc3, 0x63, 0x39, // |L..4..c9|
+            0x21, 0xbf, 0x04, 0xb0, 0x2b, 0x81, 0xf9, 0x07, // |!...+...|
+            0xe6, 0x15, 0x92, 0x89, 0x9b, 0x1e, 0xe6, 0x4b, // |.......K|
+            0x5b, 0x0b, 0x33, 0x5f, 0x89, 0x96, 0xa2, 0x74, // |[.3_...t|
+            0x41, 0x6b, 0x15, 0xe8, 0x8a, 0x62, 0xf5, 0x1c, // |Ak...b..|
+            0x37, 0x38, 0x62, 0x77, 0xd4, 0x57, 0x7b, 0x43, // |78bw.W{C|
+            0x42, 0x4f, 0x01, 0x9c, 0xf2, 0xe0, 0x68, 0xb7, // |BO....h.|
+            0xf1, 0x66, 0x93, 0xd8, 0x8e, 0x78, 0x80, 0x24, // |.f...x.$|
+            0x4c, 0x61, 0x11, 0xbb, 0xf2, 0x79, 0xf7, 0x96, // |La...y..|
+            0x02, 0x80, 0xaa, 0xc7, 0xcd, 0xbb, 0x55, 0x03, // |......U.|
+            0x22, 0x5e, 0xda, 0xa2, 0x44, 0x7d, 0x82, 0x41, // |"^..D}.A|
+            0x86, 0x9b, 0x92, 0x0a, 0xd5, 0x7e, 0xf2, 0x78, // |.....~.x|
+            0x84, 0x50, 0x00, 0x2d, 0x0b, 0xab, 0x92, 0x7a, // |.P.-...z|
+            0x96, 0x15, 0xcf, 0x5a, 0x34, 0x45, 0x35, 0xa7, // |...Z4E5.|
+            0x18, 0x61, 0x2b, 0x88, 0x45, 0xaa, 0xd3, 0xe2, // |.a+.E...|
+            0x54, 0xf9, 0xc7, 0xbb, 0xe7, 0x00, 0x86, 0xbd, // |T.......|
+            0x8b, 0xbb, 0x6d, 0x3b, 0x0f, 0x8d, 0xfb, 0x4d, // |..m;...M|
+            0x5d, 0x8b, 0x50, 0x2e, 0x68, 0x74, 0x5d, 0x03, // |].P.ht].|
+            0x16, 0x2a, 0x49, 0x24, 0x54, 0x5b, 0xa9, 0x34, // |.*I$T[.4|
+            0x25, 0x17, 0x79, 0xe3, 0xc3, 0x3a, 0x2a, 0x12, // |%.y..:*.|
+            0x75, 0x64, 0x16, 0xa4, 0xb7, 0x7e, 0x39, 0x5a, // |ud...~9Z|
+            0x4e, 0x3e, 0x53, 0x2b, 0x49, 0x1b, 0x26, 0xdf, // |N>S+I.&.|
+            0xfc, 0x29, 0x99, 0xcb, 0xad, 0x29, 0x2c, 0x72, // |.)...),r|
+            0x3f, 0xa7, 0xcb, 0x45, 0x4c, 0x14, 0xee, 0x46, // |?..EL..F|
+            0x74, 0x64, 0xdb, 0x4b, 0x4b, 0xa4, 0x35, 0x3c, // |td.KK.5<|
+            0x91, 0xc4, 0x9b, 0xb0, 0x66, 0xc6, 0x70, 0xb6, // |....f.p.|
+            0xf2, 0x07, 0x3b, 0xbf, 0x74, 0x72, 0xb4, 0x24, // |..;.tr.$|
+            0x7e, 0x87, 0xd4, 0x0a, 0x37, 0xd9, 0x49, 0x04, // |~...7.I.|
+            0x09, 0x36, 0xd1, 0x63, 0x88, 0xe1, 0xe8, 0x08, // |.6.c....|
+            0xbf, 0x17, 0xc4, 0xcd, 0xcb, 0x3c, 0xef, 0x88, // |.....<..|
+            0x2c, 0xf6, 0xa3, 0x6d, 0x89, 0x39, 0xc9, 0xfe, // |,..m.9..|
+            0x97, 0x25, 0xb3, 0x9a, 0x02, 0x40, 0xd4, 0x90, // |.%...@..|
+            0x28, 0x6a, 0x79, 0xbd, 0x4b, 0x8e, 0x10, 0x18, // |(jy.K...|
+            0xc9, 0xaf, 0xe9, 0xc0, 0x6e, 0xd5, 0xb1, 0xcf, // |....n...|
+            0xe8, 0xa4, 0xdc, 0x94, 0x12, 0x82, 0xfb, 0x08, // |........|
+            0x42, 0xd4, 0x1a, 0x76, 0xa2, 0x4b, 0x3f, 0xc3, // |B..v.K?.|
+            0xb4, 0x0b, 0xa3, 0x0c, 0xec, 0x19, 0x7c, 0x5f, // |......|_|
+            0xd5, 0x98, 0x99, 0xf4, 0x1a, 0xca, 0x83, 0xaa, // |........|
+            0xbd, 0x26, 0x31, 0x95, 0x77, 0x90, 0x43, 0x7a, // |.&1.w.Cz|
+            0x75, 0x15, 0xcb, 0x68, 0xae, 0x24, 0xc5, 0x1b, // |u..h.$..|
+            // Cutoff here.
+            0x8c, 0x49, 0xbe, 0xfc, 0x61, 0x54, 0xd7, 0x18, // |.I..aT..|
+            0x9d, 0x21, 0x10, 0x14, 0xe2, 0x6d, 0x5b, 0x4b, // |.!...m[K|
+            0xb0, 0x94, 0xaa, 0x6e, 0xd5, 0x7b, 0xba, 0x6e, // |...n.{.n|
+            0xe0, 0x03, 0xac, 0x9a, 0xbb, 0xe1, 0x17, 0x9b, // |........|
+            0x18, 0x0c, 0x33, 0xcc, 0x05, 0x91, 0x1c, 0x43, // |..3....C|
+            0x37, 0xd2, 0x10, 0xb7, 0xc6, 0xc7, 0x6b, 0xda, // |7.....k.|
+            0x87, 0x9c, 0xaf, 0x93, 0x52, 0x2f, 0x4c, 0x6e, // |....R/Ln|
+            0x14, 0xdb, 0x49, 0xbc, 0xeb, 0x96, 0xda, 0xb6, // |..I.....|
+            0x3b, 0xf8, 0xc0, 0x33, 0xba, 0x15, 0x37, 0x39, // |;..3..79|
+            0xe7, 0xae, 0xb6, 0x48, 0x3e, 0xd8, 0x57, 0x67, // |...H>.Wg|
+            0x9c, 0xb6, 0x9c, 0xc0, 0x18, 0x0e, 0x74, 0x67, // |......tg|
+            0xae, 0x8e, 0xc6, 0x80, 0x7f, 0x81, 0x25, 0xc4, // |......%.|
+            0xe9, 0x04, 0xe8, 0xd9, 0x98, 0xb6, 0x99, 0x93, // |........|
+            0xa1, 0xa4, 0x5e, 0x57, 0x74, 0x89, 0x30, 0x38, // |..^Wt.08|
+            0xa9, 0xbb, 0x99, 0x4a, 0x7e, 0x42, 0x3c, 0xd2, // |...J~B<.|
+            0x59, 0xb6, 0x49, 0xb0, 0xc7, 0x11, 0x57, 0x03, // |Y.I...W.|
+            0x6d, 0x23, 0x1b, 0x72, 0xe7, 0x24, 0xdb, 0x75, // |m#.r.$.u|
+            0x78, 0xd1, 0x38, 0x01, 0x46, 0xb6, 0x8c, 0x1b, // |x.8.F...|
+            0x41, 0xb4, 0xbd, 0xc1, 0xa2, 0x00, 0x63, 0xa5, // |A.....c.|
+            0x97, 0x30, 0x5d, 0xbe, 0xd1, 0x37, 0x31, 0xf1, // |.0]..71.|
+            0xbb, 0xc6, 0xf8, 0x81, 0x35, 0x86, 0x32, 0xa6, // |....5.2.|
+            0xc3, 0x35, 0x54, 0x45, 0x50, 0xdf, 0x61, 0x46, // |.5TEP.aF|
+            0x5b, 0x83, 0x6b, 0xac, 0x5c, 0x2d, 0xa2, 0xc3, // |[.k.\-..|
+            0x2e, 0x71, 0x32, 0x18, 0x41, 0x29, 0x99, 0x66, // |.q2.A).f|
+            0x8c, 0x50, 0x28, 0x92, 0x45, 0xae, 0x96, 0x38, // |.P(.E..8|
+            0xa4, 0x83, 0x94, 0x4a, 0x2f, 0x0e, 0x62, 0x13, // |...J/.b.|
+            0x07, 0x13, 0xc2, 0x0b, 0x84, 0xfd, 0x27, 0xab, // |......'.|
+            0x6c, 0xb4, 0x69, 0x0d, 0xd2, 0xdb, 0xfb, 0x8e, // |l.i.....|
+            0xa7, 0x09, 0x65, 0x76, 0x7e, 0x09, 0xa4, 0x7a, // |..ev~..z|
+            0xe9, 0xfe, 0xec, 0x52, 0x89, 0x7d, 0x07, 0x6f, // |...R.}.o|
+            0xff, 0xa0, 0xde, 0x8a, 0x42, 0x2d, 0xc3, 0x75, // |....B-.u|
+            0x05, 0x6d, 0x60, 0x76, 0xce, 0xe1, 0x6c, 0xfd, // |.m`v..l.|
+            0xae, 0x1f, 0x5e, 0x02, 0x94, 0x39, 0x2a, 0x55, // |..^..9*U|
+            0x00, 0x1d, 0x00, 0x20, 0x8d, 0x89, 0x9a, 0x19, // |... ....|
+            0x1d, 0x53, 0x52, 0xd5, 0xc1, 0x3e, 0x3a, 0x1d, // |.SR..>:.|
+            0x12, 0x15, 0xae, 0x33, 0x2e, 0x54, 0xd1, 0x6f, // |...3.T.o|
+            0xd6, 0xb1, 0x73, 0xd9, 0x56, 0x98, 0x6f, 0x8f, // |..s.V.o.|
+            0x7e, 0xf5, 0xd9, 0x75, 0x00, 0x0b, 0x00, 0x02, // |~..u....|
+            0x01, 0x00, 0x00, 0x05, 0x00, 0x05, 0x01, 0x00, // |........|
+            0x00, 0x00, 0x00, 0x9a, 0x9a, 0x00, 0x01, 0x00, // |........|
+        ];
+        let sni = get_sni(&BUF);
+        assert_eq!(sni[0], *"ha.home.kie.rs");
+    }
+
+    #[test]
+    fn test_too_little_data() {
+        let sni = get_sni(&TOO_LITTLE_DATA_END);
+        assert_eq!(0, sni.len());
+    }
+
+    const TOO_LITTLE_DATA_START: [u8; 1392] = [
+        0x16, 0x03, 0x01, 0x06, 0xab, 0x01, 0x00, 0x06, // |........|
+        0xa7, 0x03, 0x03, 0x84, 0x53, 0xb2, 0xd7, 0x37, // |....S..7|
+        0xcd, 0x27, 0xda, 0xf4, 0x70, 0xd8, 0x78, 0x26, // |.'..p.x&|
+        0x34, 0x7f, 0xe3, 0xa7, 0x5d, 0xfe, 0x97, 0x29, // |4...]..)|
+        0x89, 0x29, 0xa2, 0xd8, 0x62, 0x05, 0x7b, 0x13, // |.)..b.{.|
+        0xcf, 0x4b, 0x13, 0x20, 0x5b, 0x74, 0x4e, 0x23, // |.K. [tN#|
+        0x90, 0x08, 0x5a, 0x43, 0xbf, 0xe0, 0x0d, 0xeb, // |..ZC....|
+        0x8a, 0xc8, 0x4d, 0x14, 0x1e, 0x35, 0x43, 0x04, // |..M..5C.|
+        0x36, 0x32, 0xdc, 0x71, 0xff, 0xcc, 0xb3, 0x5b, // |62.q...[|
+        0x63, 0x4b, 0x2b, 0xee, 0x00, 0x20, 0xba, 0xba, // |cK+.. ..|
+        0x13, 0x01, 0x13, 0x02, 0x13, 0x03, 0xc0, 0x2b, // |.......+|
+        0xc0, 0x2f, 0xc0, 0x2c, 0xc0, 0x30, 0xcc, 0xa9, // |./.,.0..|
+        0xcc, 0xa8, 0xc0, 0x13, 0xc0, 0x14, 0x00, 0x9c, // |........|
+        0x00, 0x9d, 0x00, 0x2f, 0x00, 0x35, 0x01, 0x00, // |.../.5..|
+        0x06, 0x3e, 0x7a, 0x7a, 0x00, 0x00, 0x00, 0x0a, // |.>zz....|
+        0x00, 0x0c, 0x00, 0x0a, 0xda, 0xda, 0x11, 0xec, // |........|
+        0x00, 0x1d, 0x00, 0x17, 0x00, 0x18, 0xff, 0x01, // |........|
+        0x00, 0x01, 0x00, 0x00, 0x17, 0x00, 0x00, 0x00, // |........|
+        0x00, 0x00, 0x13, 0x00, 0x11, 0x00, 0x00, 0x0e, // |........|
+        0x68, 0x61, 0x2e, 0x68, 0x6f, 0x6d, 0x65, 0x2e, // |ha.home.|
+        0x6b, 0x69, 0x65, 0x2e, 0x72, 0x73, 0xfe, 0x0d, // |kie.rs..|
+        0x00, 0xba, 0x00, 0x00, 0x01, 0x00, 0x01, 0x11, // |........|
+        0x00, 0x20, 0xf7, 0xf4, 0x20, 0xc8, 0xb7, 0xeb, // |. .. ...|
+        0xf1, 0x2d, 0x8b, 0x30, 0x2c, 0xc8, 0x5e, 0xd3, // |.-.0,.^.|
+        0xa3, 0x02, 0x38, 0xf2, 0x41, 0xf7, 0x3f, 0x2d, // |..8.A.?-|
+        0xb4, 0xf0, 0xd7, 0x3b, 0xe5, 0x19, 0x3f, 0xc3, // |...;..?.|
+        0xae, 0x1f, 0x00, 0x90, 0x27, 0x8d, 0x4c, 0xc9, // |....'.L.|
+        0xb3, 0xd1, 0x63, 0x20, 0xe4, 0x33, 0x18, 0x56, // |..c .3.V|
+        0xd5, 0x9b, 0xd5, 0xf9, 0xf2, 0x94, 0x1d, 0xe4, // |........|
+        0xa6, 0x88, 0x47, 0xd2, 0x85, 0x4f, 0xf4, 0x30, // |..G..O.0|
+        0x22, 0xff, 0x67, 0x80, 0x60, 0x33, 0x17, 0xa0, // |".g.`3..|
+        0x4f, 0xdb, 0x98, 0x53, 0x00, 0xa4, 0xc8, 0x89, // |O..S....|
+        0xb8, 0x1b, 0x3f, 0xbd, 0xdf, 0xeb, 0x48, 0x1a, // |..?...H.|
+        0xa1, 0x33, 0xd7, 0xc1, 0x8d, 0x76, 0xf2, 0xcf, // |.3...v..|
+        0xbe, 0x30, 0x1d, 0xcd, 0x3a, 0xfe, 0xf1, 0xb0, // |.0..:...|
+        0x86, 0xbc, 0x28, 0x74, 0x78, 0xa1, 0x9a, 0x60, // |..(tx..`|
+        0x14, 0xfe, 0x12, 0x92, 0x4d, 0xb5, 0x9e, 0x85, // |....M...|
+        0x79, 0x62, 0x9c, 0x68, 0x73, 0xc6, 0x0e, 0xe5, // |yb.hs...|
+        0xad, 0x5b, 0xe2, 0x69, 0x00, 0xc0, 0x26, 0x24, // |.[.i..&$|
+        0x88, 0xfa, 0x22, 0x29, 0x36, 0x7b, 0x16, 0x59, // |..")6{.Y|
+        0x48, 0xbe, 0xf9, 0x1c, 0x86, 0x55, 0xcb, 0x67, // |H....U.g|
+        0xae, 0xb6, 0x7b, 0x69, 0x3e, 0xd0, 0x48, 0x31, // |..{i>.H1|
+        0x58, 0x8a, 0xd8, 0xba, 0x06, 0x21, 0xf0, 0xd4, // |X....!..|
+        0x4e, 0xef, 0xcf, 0x67, 0xc5, 0x63, 0x97, 0x59, // |N..g.c.Y|
+        0x95, 0x12, 0x47, 0x90, 0x00, 0x2d, 0x00, 0x02, // |..G..-..|
+        0x01, 0x01, 0x00, 0x10, 0x00, 0x0b, 0x00, 0x09, // |........|
+        0x08, 0x68, 0x74, 0x74, 0x70, 0x2f, 0x31, 0x2e, // |.http/1.|
+        0x31, 0x00, 0x0d, 0x00, 0x12, 0x00, 0x10, 0x04, // |1.......|
+        0x03, 0x08, 0x04, 0x04, 0x01, 0x05, 0x03, 0x08, // |........|
+        0x05, 0x05, 0x01, 0x08, 0x06, 0x06, 0x01, 0x00, // |........|
+        0x2b, 0x00, 0x07, 0x06, 0x0a, 0x0a, 0x03, 0x04, // |+.......|
+        0x03, 0x03, 0x00, 0x23, 0x00, 0x00, 0x00, 0x12, // |...#....|
+        0x00, 0x00, 0x00, 0x1b, 0x00, 0x03, 0x02, 0x00, // |........|
+        0x02, 0x00, 0x33, 0x04, 0xef, 0x04, 0xed, 0xda, // |..3.....|
+        0xda, 0x00, 0x01, 0x00, 0x11, 0xec, 0x04, 0xc0, // |........|
+        0xc6, 0x12, 0x85, 0x0b, 0xba, 0x73, 0x9d, 0x00, // |.....s..|
+        0x29, 0x08, 0x40, 0x3a, 0xb8, 0xfc, 0x9e, 0x99, // |).@:....|
+        0x25, 0xbd, 0x60, 0xb6, 0x8a, 0x56, 0x51, 0xac, // |%.`..VQ.|
+        0x38, 0xa3, 0x15, 0x37, 0x21, 0x80, 0x86, 0x02, // |8..7!...|
+        0xb2, 0x10, 0x4b, 0x29, 0xeb, 0x37, 0x04, 0x47, // |..K).7.G|
+        0x16, 0x12, 0x0e, 0x63, 0x2d, 0x32, 0xf6, 0x2a, // |...c-2.*|
+        0x86, 0x09, 0x7b, 0x41, 0x28, 0x8c, 0xcf, 0xfa, // |..{A(...|
+        0x08, 0x2e, 0x0c, 0xb2, 0x55, 0xb4, 0xb4, 0xd2, // |....U...|
+        0x76, 0x38, 0x47, 0x44, 0x78, 0xf0, 0x01, 0xb6, // |v8GDx...|
+        0xee, 0xf0, 0x1f, 0x4b, 0xc5, 0x6b, 0xb3, 0x93, // |...K.k..|
+        0x4d, 0xa5, 0x25, 0x29, 0xda, 0x33, 0x1e, 0xc5, // |M.%).3..|
+        0x15, 0x98, 0xf5, 0x41, 0x3e, 0xd2, 0xf7, 0x82, // |...A>...|
+        0xd7, 0xbb, 0x56, 0xf0, 0x86, 0x29, 0xa3, 0x56, // |..V..).V|
+        0x25, 0xdc, 0xaa, 0x03, 0xaa, 0x28, 0xa7, 0x2b, // |%....(.+|
+        0xc0, 0x41, 0xca, 0x66, 0x3e, 0xcc, 0x21, 0x40, // |.A.f>.!@|
+        0x60, 0x34, 0x5f, 0x9f, 0x69, 0x37, 0xac, 0x30, // |`4_.i7.0|
+        0x06, 0x7a, 0xf9, 0x26, 0xfe, 0x3c, 0x13, 0x05, // |.z.&.<..|
+        0xf6, 0xbe, 0x5f, 0x0c, 0x9a, 0x43, 0x18, 0xa2, // |.._..C..|
+        0xd9, 0xc5, 0xa0, 0x06, 0x0b, 0x0a, 0x21, 0xf1, // |......!.|
+        0x6b, 0x12, 0x4a, 0x5d, 0xec, 0xf6, 0x01, 0x30, // |k.J]...0|
+        0xb6, 0x3b, 0x34, 0x62, 0xcd, 0x5a, 0x6a, 0x26, // |.;4b.Zj&|
+        0x08, 0x98, 0xc9, 0xd0, 0x8a, 0x49, 0x94, 0x07, // |.....I..|
+        0x48, 0x45, 0x78, 0x45, 0xae, 0x24, 0x2b, 0x83, // |HExE.$+.|
+        0xb6, 0x69, 0x6c, 0x20, 0x33, 0xa9, 0xc4, 0x8e, // |.il 3...|
+        0xe7, 0x1a, 0x90, 0x28, 0xc6, 0x3f, 0x16, 0xf2, // |...(.?..|
+        0xae, 0x3e, 0x22, 0x17, 0x26, 0x9c, 0x38, 0xf5, // |.>".&.8.|
+        0x88, 0x60, 0x79, 0x16, 0x28, 0xce, 0x05, 0x72, // |.`y.(..r|
+        0x2f, 0x64, 0x99, 0xdd, 0x8c, 0x5b, 0xa6, 0xe2, // |/d...[..|
+        0x65, 0x8a, 0xe2, 0x8d, 0xb6, 0x24, 0x9e, 0x6d, // |e....$.m|
+        0x5a, 0x70, 0xfd, 0xea, 0xca, 0xec, 0x77, 0x46, // |Zp....wF|
+        0x20, 0xa8, 0x1f, 0x78, 0xf6, 0x34, 0x52, 0x13, // | ..x.4R.|
+        0x97, 0xef, 0x60, 0xb9, 0xe5, 0xc6, 0x85, 0xf2, // |..`.....|
+        0x84, 0x64, 0xdc, 0x08, 0x07, 0xe2, 0x63, 0xa6, // |.d....c.|
+        0x23, 0x64, 0x54, 0xb8, 0x72, 0xac, 0x23, 0xda, // |#dT.r.#.|
+        0x8f, 0x73, 0xe4, 0x9b, 0x80, 0x77, 0x66, 0x3f, // |.s...wf?|
+        0x69, 0x34, 0xc4, 0xfb, 0x45, 0x3d, 0x1c, 0xa7, // |i4..E=..|
+        0x86, 0x98, 0x2e, 0xb4, 0xe0, 0x84, 0xb6, 0x47, // |.......G|
+        0x78, 0xeb, 0x2b, 0x10, 0x17, 0x45, 0x8a, 0xcf, // |x.+..E..|
+        0xea, 0xb5, 0x58, 0x42, 0x93, 0xbe, 0x4b, 0xad, // |..XB..K.|
+        0xfb, 0x28, 0x11, 0x12, 0xe0, 0x7c, 0x3d, 0x34, // |.(...|=4|
+        0x8c, 0x82, 0x07, 0x84, 0xda, 0x8b, 0x35, 0x86, // |......5.|
+        0x37, 0x35, 0x1d, 0x1a, 0xa2, 0xbf, 0x0a, 0xb4, // |75......|
+        0x8e, 0xf0, 0x91, 0xc4, 0xa8, 0x3f, 0x38, 0x03, // |.....?8.|
+        0x37, 0xc1, 0x9a, 0x94, 0x43, 0x09, 0x57, 0xee, // |7...C.W.|
+        0xaa, 0xcb, 0x3d, 0x13, 0xa2, 0x33, 0xd1, 0x04, // |..=..3..|
+        0x2c, 0x6c, 0xb4, 0x1c, 0x86, 0x07, 0x0c, 0x3c, // |,l.....<|
+        0x5c, 0xc9, 0x8c, 0xc8, 0x1a, 0x85, 0xa6, 0xdd, // |\.......|
+        0xd3, 0xc5, 0xae, 0x84, 0x4d, 0xfe, 0xa2, 0x99, // |....M...|
+        0xd3, 0x0b, 0x1f, 0x43, 0x01, 0xa6, 0x7b, 0xb2, // |...C..{.|
+        0x5b, 0xd5, 0xa0, 0x3e, 0xd4, 0x6c, 0x65, 0x75, // |[..>.leu|
+        0x55, 0x28, 0x4d, 0x1c, 0x28, 0x86, 0xda, 0x94, // |U(M.(...|
+        0xbe, 0x0a, 0x99, 0x61, 0xa4, 0x88, 0xd9, 0x6a, // |...a...j|
+        0x20, 0x1d, 0x78, 0x45, 0x5f, 0x66, 0xcc, 0x8c, // | .xE_f..|
+        0xe1, 0xba, 0x4c, 0x51, 0x99, 0x54, 0x27, 0x77, // |..LQ.T'w|
+        0xb4, 0x84, 0x61, 0x4e, 0xf9, 0x90, 0x6f, 0x19, // |..aN..o.|
+        0x44, 0x93, 0x27, 0x1d, 0x95, 0x82, 0x74, 0x7f, // |D.'...t.|
+        0x35, 0xaf, 0x04, 0xe4, 0x58, 0x41, 0x3a, 0x51, // |5...XA:Q|
+        0x0b, 0x22, 0x45, 0xaf, 0x44, 0x2a, 0xe9, 0xa3, // |."E.D*..|
+        0x71, 0x65, 0x15, 0x22, 0xea, 0x40, 0x10, 0xaf, // |qe.".@..|
+        0x5b, 0x27, 0xfc, 0x02, 0x00, 0x23, 0xa3, 0x70, // |['...#.p|
+        0xa9, 0x6c, 0xa7, 0xf7, 0x29, 0x5c, 0x75, 0x9b, // |.l..)\u.|
+        0x4c, 0x23, 0x14, 0x51, 0x12, 0x62, 0x71, 0xbb, // |L#.Q.bq.|
+        0x75, 0x64, 0x65, 0xb3, 0xaa, 0x1e, 0x10, 0x14, // |ude.....|
+        0xbf, 0xd0, 0x8b, 0xe0, 0xe4, 0x51, 0x6e, 0xa8, // |.....Qn.|
+        0x1a, 0x95, 0x21, 0xa9, 0x9f, 0xf7, 0x2a, 0xac, // |..!...*.|
+        0x5c, 0x1c, 0x12, 0xac, 0x9d, 0xac, 0x57, 0x14, // |\.....W.|
+        0x27, 0xaa, 0xa7, 0xee, 0xc3, 0x9d, 0x63, 0x48, // |'.....cH|
+        0x0e, 0xd7, 0xf8, 0x92, 0x9f, 0x28, 0xb9, 0x82, // |.....(..|
+        0x71, 0x99, 0xa1, 0xcb, 0x69, 0x0c, 0x29, 0x7d, // |q...i.)}|
+        0x67, 0x73, 0xae, 0x9d, 0xd7, 0xc7, 0x51, 0x7a, // |gs....Qz|
+        0x2c, 0x3a, 0x74, 0x89, 0x7d, 0x76, 0x35, 0xb5, // |,:t.}v5.|
+        0x97, 0x73, 0x4a, 0xfc, 0x29, 0x9a, 0x1a, 0x06, // |.sJ.)...|
+        0x2f, 0xd0, 0x89, 0x32, 0xfc, 0x3b, 0x17, 0xec, // |/..2.;..|
+        0x7a, 0xb5, 0x3c, 0x66, 0x0f, 0x43, 0x55, 0x41, // |z.<f.CUA|
+        0x49, 0x3f, 0xbf, 0xa1, 0x6f, 0x8a, 0x05, 0x76, // |I?..o..v|
+        0xd4, 0x02, 0x33, 0x52, 0x78, 0xc8, 0x08, 0xe9, // |..3Rx...|
+        0x49, 0xb8, 0x42, 0x05, 0xed, 0x34, 0x0a, 0xb1, // |I.B..4..|
+        0xa8, 0x32, 0x00, 0x6b, 0x00, 0x42, 0x56, 0x8a, // |.2.k.BV.|
+        0xe9, 0x04, 0x7a, 0xac, 0xc8, 0x72, 0x7f, 0x40, // |..z..r.@|
+        0x4c, 0xd6, 0xa9, 0x34, 0x0b, 0xc3, 0x63, 0x39, // |L..4..c9|
+        0x21, 0xbf, 0x04, 0xb0, 0x2b, 0x81, 0xf9, 0x07, // |!...+...|
+        0xe6, 0x15, 0x92, 0x89, 0x9b, 0x1e, 0xe6, 0x4b, // |.......K|
+        0x5b, 0x0b, 0x33, 0x5f, 0x89, 0x96, 0xa2, 0x74, // |[.3_...t|
+        0x41, 0x6b, 0x15, 0xe8, 0x8a, 0x62, 0xf5, 0x1c, // |Ak...b..|
+        0x37, 0x38, 0x62, 0x77, 0xd4, 0x57, 0x7b, 0x43, // |78bw.W{C|
+        0x42, 0x4f, 0x01, 0x9c, 0xf2, 0xe0, 0x68, 0xb7, // |BO....h.|
+        0xf1, 0x66, 0x93, 0xd8, 0x8e, 0x78, 0x80, 0x24, // |.f...x.$|
+        0x4c, 0x61, 0x11, 0xbb, 0xf2, 0x79, 0xf7, 0x96, // |La...y..|
+        0x02, 0x80, 0xaa, 0xc7, 0xcd, 0xbb, 0x55, 0x03, // |......U.|
+        0x22, 0x5e, 0xda, 0xa2, 0x44, 0x7d, 0x82, 0x41, // |"^..D}.A|
+        0x86, 0x9b, 0x92, 0x0a, 0xd5, 0x7e, 0xf2, 0x78, // |.....~.x|
+        0x84, 0x50, 0x00, 0x2d, 0x0b, 0xab, 0x92, 0x7a, // |.P.-...z|
+        0x96, 0x15, 0xcf, 0x5a, 0x34, 0x45, 0x35, 0xa7, // |...Z4E5.|
+        0x18, 0x61, 0x2b, 0x88, 0x45, 0xaa, 0xd3, 0xe2, // |.a+.E...|
+        0x54, 0xf9, 0xc7, 0xbb, 0xe7, 0x00, 0x86, 0xbd, // |T.......|
+        0x8b, 0xbb, 0x6d, 0x3b, 0x0f, 0x8d, 0xfb, 0x4d, // |..m;...M|
+        0x5d, 0x8b, 0x50, 0x2e, 0x68, 0x74, 0x5d, 0x03, // |].P.ht].|
+        0x16, 0x2a, 0x49, 0x24, 0x54, 0x5b, 0xa9, 0x34, // |.*I$T[.4|
+        0x25, 0x17, 0x79, 0xe3, 0xc3, 0x3a, 0x2a, 0x12, // |%.y..:*.|
+        0x75, 0x64, 0x16, 0xa4, 0xb7, 0x7e, 0x39, 0x5a, // |ud...~9Z|
+        0x4e, 0x3e, 0x53, 0x2b, 0x49, 0x1b, 0x26, 0xdf, // |N>S+I.&.|
+        0xfc, 0x29, 0x99, 0xcb, 0xad, 0x29, 0x2c, 0x72, // |.)...),r|
+        0x3f, 0xa7, 0xcb, 0x45, 0x4c, 0x14, 0xee, 0x46, // |?..EL..F|
+        0x74, 0x64, 0xdb, 0x4b, 0x4b, 0xa4, 0x35, 0x3c, // |td.KK.5<|
+        0x91, 0xc4, 0x9b, 0xb0, 0x66, 0xc6, 0x70, 0xb6, // |....f.p.|
+        0xf2, 0x07, 0x3b, 0xbf, 0x74, 0x72, 0xb4, 0x24, // |..;.tr.$|
+        0x7e, 0x87, 0xd4, 0x0a, 0x37, 0xd9, 0x49, 0x04, // |~...7.I.|
+        0x09, 0x36, 0xd1, 0x63, 0x88, 0xe1, 0xe8, 0x08, // |.6.c....|
+        0xbf, 0x17, 0xc4, 0xcd, 0xcb, 0x3c, 0xef, 0x88, // |.....<..|
+        0x2c, 0xf6, 0xa3, 0x6d, 0x89, 0x39, 0xc9, 0xfe, // |,..m.9..|
+        0x97, 0x25, 0xb3, 0x9a, 0x02, 0x40, 0xd4, 0x90, // |.%...@..|
+        0x28, 0x6a, 0x79, 0xbd, 0x4b, 0x8e, 0x10, 0x18, // |(jy.K...|
+        0xc9, 0xaf, 0xe9, 0xc0, 0x6e, 0xd5, 0xb1, 0xcf, // |....n...|
+        0xe8, 0xa4, 0xdc, 0x94, 0x12, 0x82, 0xfb, 0x08, // |........|
+        0x42, 0xd4, 0x1a, 0x76, 0xa2, 0x4b, 0x3f, 0xc3, // |B..v.K?.|
+        0xb4, 0x0b, 0xa3, 0x0c, 0xec, 0x19, 0x7c, 0x5f, // |......|_|
+        0xd5, 0x98, 0x99, 0xf4, 0x1a, 0xca, 0x83, 0xaa, // |........|
+        0xbd, 0x26, 0x31, 0x95, 0x77, 0x90, 0x43, 0x7a, // |.&1.w.Cz|
+        0x75, 0x15, 0xcb, 0x68, 0xae, 0x24, 0xc5, 0x1b, // |u..h.$..|
+    ];
+
+    const TOO_LITTLE_DATA_END: [u8; 312] = [
+        0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, // |........|
+        0x00, 0x01, 0x00, 0x06, 0x14, 0x49, 0xbc, 0x07, // |.....I..|
+        0xd1, 0x60, 0x00, 0x00, 0x45, 0x00, 0x01, 0x24, // |.`..E..$|
+        0x46, 0x04, 0x40, 0x00, 0x7f, 0x06, 0x11, 0x27, // |F.@....'|
+        0x4d, 0xaf, 0x56, 0xec, 0xc0, 0xa8, 0x3e, 0x65, // |M.V...>e|
+        0xbf, 0x7f, 0x01, 0xbb, 0xaf, 0x09, 0x43, 0xb4, // |......C.|
+        0xde, 0x93, 0xcc, 0x66, 0x50, 0x18, 0x02, 0x01, // |...fP...|
+        0xd3, 0x21, 0x00, 0x00, 0xba, 0x15, 0x37, 0x39, // |.!....79|
+        0xe7, 0xae, 0xb6, 0x48, 0x3e, 0xd8, 0x57, 0x67, // |...H>.Wg|
+        0x9c, 0xb6, 0x9c, 0xc0, 0x18, 0x0e, 0x74, 0x67, // |......tg|
+        0xae, 0x8e, 0xc6, 0x80, 0x7f, 0x81, 0x25, 0xc4, // |......%.|
+        0xe9, 0x04, 0xe8, 0xd9, 0x98, 0xb6, 0x99, 0x93, // |........|
+        0xa1, 0xa4, 0x5e, 0x57, 0x74, 0x89, 0x30, 0x38, // |..^Wt.08|
+        0xa9, 0xbb, 0x99, 0x4a, 0x7e, 0x42, 0x3c, 0xd2, // |...J~B<.|
+        0x59, 0xb6, 0x49, 0xb0, 0xc7, 0x11, 0x57, 0x03, // |Y.I...W.|
+        0x6d, 0x23, 0x1b, 0x72, 0xe7, 0x24, 0xdb, 0x75, // |m#.r.$.u|
+        0x78, 0xd1, 0x38, 0x01, 0x46, 0xb6, 0x8c, 0x1b, // |x.8.F...|
+        0x41, 0xb4, 0xbd, 0xc1, 0xa2, 0x00, 0x63, 0xa5, // |A.....c.|
+        0x97, 0x30, 0x5d, 0xbe, 0xd1, 0x37, 0x31, 0xf1, // |.0]..71.|
+        0xbb, 0xc6, 0xf8, 0x81, 0x35, 0x86, 0x32, 0xa6, // |....5.2.|
+        0xc3, 0x35, 0x54, 0x45, 0x50, 0xdf, 0x61, 0x46, // |.5TEP.aF|
+        0x5b, 0x83, 0x6b, 0xac, 0x5c, 0x2d, 0xa2, 0xc3, // |[.k.\-..|
+        0x2e, 0x71, 0x32, 0x18, 0x41, 0x29, 0x99, 0x66, // |.q2.A).f|
+        0x8c, 0x50, 0x28, 0x92, 0x45, 0xae, 0x96, 0x38, // |.P(.E..8|
+        0xa4, 0x83, 0x94, 0x4a, 0x2f, 0x0e, 0x62, 0x13, // |...J/.b.|
+        0x07, 0x13, 0xc2, 0x0b, 0x84, 0xfd, 0x27, 0xab, // |......'.|
+        0x6c, 0xb4, 0x69, 0x0d, 0xd2, 0xdb, 0xfb, 0x8e, // |l.i.....|
+        0xa7, 0x09, 0x65, 0x76, 0x7e, 0x09, 0xa4, 0x7a, // |..ev~..z|
+        0xe9, 0xfe, 0xec, 0x52, 0x89, 0x7d, 0x07, 0x6f, // |...R.}.o|
+        0xff, 0xa0, 0xde, 0x8a, 0x42, 0x2d, 0xc3, 0x75, // |....B-.u|
+        0x05, 0x6d, 0x60, 0x76, 0xce, 0xe1, 0x6c, 0xfd, // |.m`v..l.|
+        0xae, 0x1f, 0x5e, 0x02, 0x94, 0x39, 0x2a, 0x55, // |..^..9*U|
+        0x00, 0x1d, 0x00, 0x20, 0x8d, 0x89, 0x9a, 0x19, // |... ....|
+        0x1d, 0x53, 0x52, 0xd5, 0xc1, 0x3e, 0x3a, 0x1d, // |.SR..>:.|
+        0x12, 0x15, 0xae, 0x33, 0x2e, 0x54, 0xd1, 0x6f, // |...3.T.o|
+        0xd6, 0xb1, 0x73, 0xd9, 0x56, 0x98, 0x6f, 0x8f, // |..s.V.o.|
+        0x7e, 0xf5, 0xd9, 0x75, 0x00, 0x0b, 0x00, 0x02, // |~..u....|
+        0x01, 0x00, 0x00, 0x05, 0x00, 0x05, 0x01, 0x00, // |........|
+        0x00, 0x00, 0x00, 0x9a, 0x9a, 0x00, 0x01, 0x00, // |........|
+    ];
 }

src/servers/upstream_address.rs

@@ -4,7 +4,8 @@ use std::io::Result;
 use std::net::SocketAddr;
 use std::sync::Arc;
 use std::sync::RwLock;
-use time::{Duration, Instant, OffsetDateTime};
+use std::time::Instant;
+use time::{Duration, OffsetDateTime};
 
 #[derive(Debug, Clone, Default)]
 pub(crate) struct UpstreamAddress {

src/update.rs

@@ -0,0 +1,22 @@
+use self_update::cargo_crate_version;
+
+pub(crate) fn update() {
+    println!("Updating to the latest version...");
+
+    let backend = self_update::backends::gitea::Update::configure()
+        .with_host("https://code.kiers.eu")
+        .repo_owner("jjkiers")
+        .repo_name("layer4-proxy")
+        .bin_name("l4p")
+        .show_download_progress(true)
+        .current_version(cargo_crate_version!())
+        .build()
+        .expect("Should initialize correctly.");
+
+    let status = backend.update_extended();
+
+    match status {
+        Err(e) => eprintln!("Error updating: {e}"),
+        Ok(_) => (),
+    }
+}