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@ -11,6 +11,7 @@ use tokio::sync::oneshot;
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use crate::common::InmemoryTransport;
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use crate::common::{
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Backup, FramedTransport, HeapSecretKey, Keychain, KeychainResult, Reconnectable, Transport,
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TransportExt, Version,
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};
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/// Id of the connection
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@ -110,6 +111,19 @@ where
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debug!("[Conn {id}] Re-establishing connection");
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Reconnectable::reconnect(transport).await?;
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// Wait for exactly version bytes (24 where 8 bytes for major, minor, patch)
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// but with a reconnect we don't actually validate it because we did that
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// the first time we connected
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//
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// NOTE: We do this with the raw transport and not the framed version!
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debug!("[Conn {id}] Waiting for server version");
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if transport.as_mut_inner().read_exact(&mut [0u8; 24]).await? != 24 {
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return Err(io::Error::new(
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io::ErrorKind::InvalidData,
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"Wrong version byte len received",
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));
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}
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// Perform a handshake to ensure that the connection is properly established and encrypted
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debug!("[Conn {id}] Performing handshake");
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transport.client_handshake().await?;
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@ -190,13 +204,42 @@ where
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/// Transforms a raw [`Transport`] into an established [`Connection`] from the client-side by
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/// performing the following:
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///
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/// 1. Handshakes to derive the appropriate [`Codec`](crate::Codec) to use
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/// 2. Authenticates the established connection to ensure it is valid
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/// 3. Restores pre-existing state using the provided backup, replaying any missing frames and
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/// 1. Performs a version check with the server
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/// 2. Handshakes to derive the appropriate [`Codec`](crate::Codec) to use
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/// 3. Authenticates the established connection to ensure it is valid
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/// 4. Restores pre-existing state using the provided backup, replaying any missing frames and
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/// receiving any frames from the other side
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pub async fn client<H: AuthHandler + Send>(transport: T, handler: H) -> io::Result<Self> {
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pub async fn client<H: AuthHandler + Send>(
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transport: T,
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handler: H,
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version: Version,
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) -> io::Result<Self> {
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let id: ConnectionId = rand::random();
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// Wait for exactly version bytes (24 where 8 bytes for major, minor, patch)
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debug!("[Conn {id}] Waiting for server version");
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let mut version_bytes = [0u8; 24];
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if transport.read_exact(&mut version_bytes).await? != 24 {
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return Err(io::Error::new(
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io::ErrorKind::InvalidData,
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"Wrong version byte len received",
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));
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}
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// Compare versions for compatibility and drop the connection if incompatible
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let server_version = Version::from_be_bytes(version_bytes);
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debug!(
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"[Conn {id}] Checking compatibility between client {version} & server {server_version}"
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);
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if !version.is_compatible_with(&server_version) {
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return Err(io::Error::new(
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io::ErrorKind::Other,
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format!(
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"Client version {version} is incompatible with server version {server_version}"
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),
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));
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}
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// Perform a handshake to ensure that the connection is properly established and encrypted
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debug!("[Conn {id}] Performing handshake");
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let mut transport: FramedTransport<T> =
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@ -238,19 +281,25 @@ where
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/// Transforms a raw [`Transport`] into an established [`Connection`] from the server-side by
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/// performing the following:
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///
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/// 1. Handshakes to derive the appropriate [`Codec`](crate::Codec) to use
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/// 2. Authenticates the established connection to ensure it is valid by either using the
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/// 1. Performs a version check with the client
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/// 2. Handshakes to derive the appropriate [`Codec`](crate::Codec) to use
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/// 3. Authenticates the established connection to ensure it is valid by either using the
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/// given `verifier` or, if working with an existing client connection, will validate an OTP
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/// from our database
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/// 3. Restores pre-existing state using the provided backup, replaying any missing frames and
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/// 4. Restores pre-existing state using the provided backup, replaying any missing frames and
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/// receiving any frames from the other side
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pub async fn server(
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transport: T,
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verifier: &Verifier,
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keychain: Keychain<oneshot::Receiver<Backup>>,
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version: Version,
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) -> io::Result<Self> {
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let id: ConnectionId = rand::random();
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// Write the version as bytes
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debug!("[Conn {id}] Sending version {version}");
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transport.write_all(&version.to_be_bytes()).await?;
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// Perform a handshake to ensure that the connection is properly established and encrypted
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debug!("[Conn {id}] Performing handshake");
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let mut transport: FramedTransport<T> =
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@ -464,6 +513,60 @@ mod tests {
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use super::*;
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use crate::common::Frame;
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macro_rules! server_version {
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() => {
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Version::new(1, 2, 3)
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};
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}
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macro_rules! send_server_version {
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($transport:expr, $version:expr) => {{
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($transport)
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.as_mut_inner()
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.write_all(&$version.to_be_bytes())
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.await
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.unwrap();
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}};
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($transport:expr) => {
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send_server_version!($transport, server_version!());
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};
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}
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macro_rules! receive_version {
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($transport:expr) => {{
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let mut bytes = [0u8; 24];
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assert_eq!(
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($transport)
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.as_mut_inner()
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.read_exact(&mut bytes)
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.await
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.unwrap(),
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24,
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"Wrong version len received"
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);
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Version::from_be_bytes(bytes)
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}};
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}
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#[test(tokio::test)]
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async fn client_should_fail_when_server_sends_incompatible_version() {
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let (mut t1, t2) = FramedTransport::pair(100);
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// Spawn a task to perform the client connection so we don't deadlock while simulating the
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// server actions on the other side
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let task = tokio::spawn(async move {
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Connection::client(t2.into_inner(), DummyAuthHandler, Version::new(1, 2, 3))
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.await
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.unwrap()
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});
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// Send invalid version to fail the handshake
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send_server_version!(t1, Version::new(2, 0, 0));
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// Client should fail
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task.await.unwrap_err();
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}
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#[test(tokio::test)]
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async fn client_should_fail_if_codec_handshake_fails() {
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let (mut t1, t2) = FramedTransport::pair(100);
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@ -471,11 +574,14 @@ mod tests {
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// Spawn a task to perform the client connection so we don't deadlock while simulating the
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// server actions on the other side
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let task = tokio::spawn(async move {
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Connection::client(t2.into_inner(), DummyAuthHandler)
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Connection::client(t2.into_inner(), DummyAuthHandler, server_version!())
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.await
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.unwrap()
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});
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// Send server version for client to confirm
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send_server_version!(t1);
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// Send garbage to fail the handshake
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t1.write_frame(Frame::new(b"invalid")).await.unwrap();
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@ -490,11 +596,14 @@ mod tests {
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// Spawn a task to perform the client connection so we don't deadlock while simulating the
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// server actions on the other side
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let task = tokio::spawn(async move {
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Connection::client(t2.into_inner(), DummyAuthHandler)
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Connection::client(t2.into_inner(), DummyAuthHandler, server_version!())
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.await
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.unwrap()
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});
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// Send server version for client to confirm
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send_server_version!(t1);
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// Perform first step of connection by establishing the codec
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t1.server_handshake().await.unwrap();
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@ -519,11 +628,14 @@ mod tests {
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// Spawn a task to perform the client connection so we don't deadlock while simulating the
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// server actions on the other side
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let task = tokio::spawn(async move {
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Connection::client(t2.into_inner(), DummyAuthHandler)
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Connection::client(t2.into_inner(), DummyAuthHandler, server_version!())
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.await
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.unwrap()
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});
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// Send server version for client to confirm
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send_server_version!(t1);
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// Perform first step of connection by establishing the codec
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t1.server_handshake().await.unwrap();
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@ -559,11 +671,14 @@ mod tests {
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// Spawn a task to perform the client connection so we don't deadlock while simulating the
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// server actions on the other side
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let task = tokio::spawn(async move {
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Connection::client(t2.into_inner(), DummyAuthHandler)
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Connection::client(t2.into_inner(), DummyAuthHandler, server_version!())
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.await
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.unwrap()
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});
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// Send server version for client to confirm
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send_server_version!(t1);
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// Perform first step of connection by establishing the codec
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t1.server_handshake().await.unwrap();
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@ -597,11 +712,14 @@ mod tests {
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// Spawn a task to perform the client connection so we don't deadlock while simulating the
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// server actions on the other side
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let task = tokio::spawn(async move {
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Connection::client(t2.into_inner(), DummyAuthHandler)
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Connection::client(t2.into_inner(), DummyAuthHandler, server_version!())
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.await
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.unwrap()
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});
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// Send server version for client to confirm
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send_server_version!(t1);
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// Perform first step of connection by establishing the codec
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t1.server_handshake().await.unwrap();
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@ -629,6 +747,30 @@ mod tests {
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assert_eq!(client.otp(), Some(&otp));
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}
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#[test(tokio::test)]
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async fn server_should_fail_if_client_drops_due_to_version() {
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let (mut t1, t2) = FramedTransport::pair(100);
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let verifier = Verifier::none();
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let keychain = Keychain::new();
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// Spawn a task to perform the server connection so we don't deadlock while simulating the
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// client actions on the other side
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let task = tokio::spawn(async move {
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Connection::server(t2.into_inner(), &verifier, keychain, server_version!())
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.await
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.unwrap()
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});
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// Receive the version from the server
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let _ = receive_version!(t1);
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// Drop client connection as a result of an "incompatible version"
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drop(t1);
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// Server should fail
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task.await.unwrap_err();
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}
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#[test(tokio::test)]
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async fn server_should_fail_if_codec_handshake_fails() {
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let (mut t1, t2) = FramedTransport::pair(100);
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@ -638,11 +780,14 @@ mod tests {
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// Spawn a task to perform the server connection so we don't deadlock while simulating the
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// client actions on the other side
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let task = tokio::spawn(async move {
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Connection::server(t2.into_inner(), &verifier, keychain)
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Connection::server(t2.into_inner(), &verifier, keychain, server_version!())
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.await
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.unwrap()
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});
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// Receive the version from the server
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let _ = receive_version!(t1);
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// Send garbage to fail the handshake
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t1.write_frame(Frame::new(b"invalid")).await.unwrap();
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@ -659,11 +804,14 @@ mod tests {
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// Spawn a task to perform the server connection so we don't deadlock while simulating the
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// client actions on the other side
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let task = tokio::spawn(async move {
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Connection::server(t2.into_inner(), &verifier, keychain)
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Connection::server(t2.into_inner(), &verifier, keychain, server_version!())
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.await
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.unwrap()
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});
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// Receive the version from the server
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let _ = receive_version!(t1);
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// Perform first step of completing client-side of handshake
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t1.client_handshake().await.unwrap();
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|
@ -683,11 +831,14 @@ mod tests {
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// Spawn a task to perform the server connection so we don't deadlock while simulating the
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// client actions on the other side
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let task = tokio::spawn(async move {
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Connection::server(t2.into_inner(), &verifier, keychain)
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Connection::server(t2.into_inner(), &verifier, keychain, server_version!())
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.await
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.unwrap()
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});
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// Receive the version from the server
|
|
|
|
|
let _ = receive_version!(t1);
|
|
|
|
|
|
|
|
|
|
// Perform first step of completing client-side of handshake
|
|
|
|
|
t1.client_handshake().await.unwrap();
|
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@ -717,11 +868,14 @@ mod tests {
|
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// Spawn a task to perform the server connection so we don't deadlock while simulating the
|
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|
|
// client actions on the other side
|
|
|
|
|
let task = tokio::spawn(async move {
|
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|
Connection::server(t2.into_inner(), &verifier, keychain)
|
|
|
|
|
Connection::server(t2.into_inner(), &verifier, keychain, server_version!())
|
|
|
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|
.await
|
|
|
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|
.unwrap()
|
|
|
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|
});
|
|
|
|
|
|
|
|
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// Receive the version from the server
|
|
|
|
|
let _ = receive_version!(t1);
|
|
|
|
|
|
|
|
|
|
// Perform first step of completing client-side of handshake
|
|
|
|
|
t1.client_handshake().await.unwrap();
|
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|
|
|
|
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@ -750,11 +904,14 @@ mod tests {
|
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|
// Spawn a task to perform the server connection so we don't deadlock while simulating the
|
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|
|
|
// client actions on the other side
|
|
|
|
|
let task = tokio::spawn(async move {
|
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|
|
|
Connection::server(t2.into_inner(), &verifier, keychain)
|
|
|
|
|
Connection::server(t2.into_inner(), &verifier, keychain, server_version!())
|
|
|
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|
.await
|
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|
|
|
.unwrap()
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
// Receive the version from the server
|
|
|
|
|
let _ = receive_version!(t1);
|
|
|
|
|
|
|
|
|
|
// Perform first step of completing client-side of handshake
|
|
|
|
|
t1.client_handshake().await.unwrap();
|
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|
|
|
|
|
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|
@ -790,11 +947,14 @@ mod tests {
|
|
|
|
|
// Spawn a task to perform the server connection so we don't deadlock while simulating the
|
|
|
|
|
// client actions on the other side
|
|
|
|
|
let task = tokio::spawn(async move {
|
|
|
|
|
Connection::server(t2.into_inner(), &verifier, keychain)
|
|
|
|
|
Connection::server(t2.into_inner(), &verifier, keychain, server_version!())
|
|
|
|
|
.await
|
|
|
|
|
.unwrap()
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
// Receive the version from the server
|
|
|
|
|
let _ = receive_version!(t1);
|
|
|
|
|
|
|
|
|
|
// Perform first step of completing client-side of handshake
|
|
|
|
|
t1.client_handshake().await.unwrap();
|
|
|
|
|
|
|
|
|
|
@ -828,11 +988,14 @@ mod tests {
|
|
|
|
|
// Spawn a task to perform the server connection so we don't deadlock while simulating the
|
|
|
|
|
// client actions on the other side
|
|
|
|
|
let task = tokio::spawn(async move {
|
|
|
|
|
Connection::server(t2.into_inner(), &verifier, keychain)
|
|
|
|
|
Connection::server(t2.into_inner(), &verifier, keychain, server_version!())
|
|
|
|
|
.await
|
|
|
|
|
.unwrap()
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
// Receive the version from the server
|
|
|
|
|
let _ = receive_version!(t1);
|
|
|
|
|
|
|
|
|
|
// Perform first step of completing client-side of handshake
|
|
|
|
|
t1.client_handshake().await.unwrap();
|
|
|
|
|
|
|
|
|
|
@ -866,11 +1029,14 @@ mod tests {
|
|
|
|
|
// Spawn a task to perform the server connection so we don't deadlock while simulating the
|
|
|
|
|
// client actions on the other side
|
|
|
|
|
let task = tokio::spawn(async move {
|
|
|
|
|
Connection::server(t2.into_inner(), &verifier, keychain)
|
|
|
|
|
Connection::server(t2.into_inner(), &verifier, keychain, server_version!())
|
|
|
|
|
.await
|
|
|
|
|
.unwrap()
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
// Receive the version from the server
|
|
|
|
|
let _ = receive_version!(t1);
|
|
|
|
|
|
|
|
|
|
// Perform first step of completing client-side of handshake
|
|
|
|
|
t1.client_handshake().await.unwrap();
|
|
|
|
|
|
|
|
|
|
@ -904,12 +1070,15 @@ mod tests {
|
|
|
|
|
let task = tokio::spawn({
|
|
|
|
|
let keychain = keychain.clone();
|
|
|
|
|
async move {
|
|
|
|
|
Connection::server(t2.into_inner(), &verifier, keychain)
|
|
|
|
|
Connection::server(t2.into_inner(), &verifier, keychain, server_version!())
|
|
|
|
|
.await
|
|
|
|
|
.unwrap()
|
|
|
|
|
}
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
// Receive the version from the server
|
|
|
|
|
let _ = receive_version!(t1);
|
|
|
|
|
|
|
|
|
|
// Perform first step of completing client-side of handshake
|
|
|
|
|
t1.client_handshake().await.unwrap();
|
|
|
|
|
|
|
|
|
|
@ -969,12 +1138,15 @@ mod tests {
|
|
|
|
|
let task = tokio::spawn({
|
|
|
|
|
let keychain = keychain.clone();
|
|
|
|
|
async move {
|
|
|
|
|
Connection::server(t2.into_inner(), &verifier, keychain)
|
|
|
|
|
Connection::server(t2.into_inner(), &verifier, keychain, server_version!())
|
|
|
|
|
.await
|
|
|
|
|
.unwrap()
|
|
|
|
|
}
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
// Receive the version from the server
|
|
|
|
|
let _ = receive_version!(t1);
|
|
|
|
|
|
|
|
|
|
// Perform first step of completing client-side of handshake
|
|
|
|
|
t1.client_handshake().await.unwrap();
|
|
|
|
|
|
|
|
|
|
@ -1029,13 +1201,13 @@ mod tests {
|
|
|
|
|
|
|
|
|
|
// Spawn a task to perform the server connection so we don't deadlock
|
|
|
|
|
let task = tokio::spawn(async move {
|
|
|
|
|
Connection::server(t2, &verifier, keychain)
|
|
|
|
|
Connection::server(t2, &verifier, keychain, server_version!())
|
|
|
|
|
.await
|
|
|
|
|
.expect("Failed to connect from server")
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
// Perform the client-side of the connection
|
|
|
|
|
let mut client = Connection::client(t1, DummyAuthHandler)
|
|
|
|
|
let mut client = Connection::client(t1, DummyAuthHandler, server_version!())
|
|
|
|
|
.await
|
|
|
|
|
.expect("Failed to connect from client");
|
|
|
|
|
let mut server = task.await.unwrap();
|
|
|
|
|
@ -1063,14 +1235,14 @@ mod tests {
|
|
|
|
|
let verifier = Arc::clone(&verifier);
|
|
|
|
|
let keychain = keychain.clone();
|
|
|
|
|
tokio::spawn(async move {
|
|
|
|
|
Connection::server(t2, &verifier, keychain)
|
|
|
|
|
Connection::server(t2, &verifier, keychain, server_version!())
|
|
|
|
|
.await
|
|
|
|
|
.expect("Failed to connect from server")
|
|
|
|
|
})
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
// Perform the client-side of the connection
|
|
|
|
|
let mut client = Connection::client(t1, DummyAuthHandler)
|
|
|
|
|
let mut client = Connection::client(t1, DummyAuthHandler, server_version!())
|
|
|
|
|
.await
|
|
|
|
|
.expect("Failed to connect from client");
|
|
|
|
|
|
|
|
|
|
@ -1093,6 +1265,9 @@ mod tests {
|
|
|
|
|
// Spawn a task to perform the client reconnection so we don't deadlock
|
|
|
|
|
let task = tokio::spawn(async move { client.reconnect().await.unwrap() });
|
|
|
|
|
|
|
|
|
|
// Send a version, although it'll be ignored by a reconnecting client
|
|
|
|
|
send_server_version!(transport);
|
|
|
|
|
|
|
|
|
|
// Send garbage to fail handshake from server-side
|
|
|
|
|
transport.write_frame(b"hello").await.unwrap();
|
|
|
|
|
|
|
|
|
|
@ -1108,6 +1283,9 @@ mod tests {
|
|
|
|
|
// Spawn a task to perform the client reconnection so we don't deadlock
|
|
|
|
|
let task = tokio::spawn(async move { client.reconnect().await.unwrap() });
|
|
|
|
|
|
|
|
|
|
// Send a version, although it'll be ignored by a reconnecting client
|
|
|
|
|
send_server_version!(transport);
|
|
|
|
|
|
|
|
|
|
// Perform first step of completing server-side of handshake
|
|
|
|
|
transport.server_handshake().await.unwrap();
|
|
|
|
|
|
|
|
|
|
@ -1126,6 +1304,9 @@ mod tests {
|
|
|
|
|
// Spawn a task to perform the client reconnection so we don't deadlock
|
|
|
|
|
let task = tokio::spawn(async move { client.reconnect().await.unwrap() });
|
|
|
|
|
|
|
|
|
|
// Send a version, although it'll be ignored by a reconnecting client
|
|
|
|
|
send_server_version!(transport);
|
|
|
|
|
|
|
|
|
|
// Perform first step of completing server-side of handshake
|
|
|
|
|
transport.server_handshake().await.unwrap();
|
|
|
|
|
|
|
|
|
|
@ -1162,6 +1343,9 @@ mod tests {
|
|
|
|
|
// Spawn a task to perform the client reconnection so we don't deadlock
|
|
|
|
|
let task = tokio::spawn(async move { client.reconnect().await.unwrap() });
|
|
|
|
|
|
|
|
|
|
// Send a version, although it'll be ignored by a reconnecting client
|
|
|
|
|
send_server_version!(transport);
|
|
|
|
|
|
|
|
|
|
// Perform first step of completing server-side of handshake
|
|
|
|
|
transport.server_handshake().await.unwrap();
|
|
|
|
|
|
|
|
|
|
@ -1205,6 +1389,9 @@ mod tests {
|
|
|
|
|
client
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
// Send a version, although it'll be ignored by a reconnecting client
|
|
|
|
|
send_server_version!(transport);
|
|
|
|
|
|
|
|
|
|
// Perform first step of completing server-side of handshake
|
|
|
|
|
transport.server_handshake().await.unwrap();
|
|
|
|
|
|
|
|
|
|
@ -1275,7 +1462,7 @@ mod tests {
|
|
|
|
|
|
|
|
|
|
// Spawn a task to perform the server reconnection so we don't deadlock
|
|
|
|
|
let task = tokio::spawn(async move {
|
|
|
|
|
Connection::server(transport, &verifier, keychain)
|
|
|
|
|
Connection::server(transport, &verifier, keychain, server_version!())
|
|
|
|
|
.await
|
|
|
|
|
.expect("Failed to connect from server")
|
|
|
|
|
});
|
|
|
|
|
|
Chip Senkbeil
10 months ago
committed by
GitHub