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use std::{str::FromStr, sync::atomic::Ordering};
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use anyhow::Error;
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use semver::Version;
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use crate::{
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connection::ConnectionError,
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messages::handshake::{HandshakeFinalize, HandshakeResponse, InitiateHandshake},
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model::authenticated::{AuthenticatedInstance, Message, MessageHandler, NetworkMessage, State},
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validate_version,
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};
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use super::{wrapper::ConnectionState, HandlerUnhandled};
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pub async fn handshake_handle(
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message: &NetworkMessage,
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state: &ConnectionState,
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) -> Result<(), Error> {
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if initiate_handshake
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.handle_message(&message, state)
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.await
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.is_ok()
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{
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Ok(())
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} else if handshake_response
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.handle_message(&message, state)
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.await
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.is_ok()
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{
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Ok(())
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} else if handshake_finalize
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.handle_message(&message, state)
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.await
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.is_ok()
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{
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Ok(())
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} else {
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Err(Error::from(HandlerUnhandled))
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}
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}
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async fn initiate_handshake(
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Message(initiation): Message<InitiateHandshake>,
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State(connection_state): State<ConnectionState>,
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_instance: AuthenticatedInstance,
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) -> Result<(), HandshakeError> {
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if !validate_version(&initiation.version) {
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error!(
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"Version compatibility failure! Our Version: {}, Their Version: {}",
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Version::from_str(&std::env::var("CARGO_PKG_VERSION").unwrap()).unwrap(),
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initiation.version
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);
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connection_state
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.send(HandshakeFinalize { success: false })
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.await
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.map_err(|e| HandshakeError::SendError(e))?;
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Ok(())
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} else {
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connection_state
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.send(HandshakeFinalize { success: true })
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.await
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.map_err(|e| HandshakeError::SendError(e))?;
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Ok(())
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}
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}
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async fn handshake_response(
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Message(response): Message<HandshakeResponse>,
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State(connection_state): State<ConnectionState>,
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_instance: AuthenticatedInstance,
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) -> Result<(), HandshakeError> {
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if !validate_version(&response.version) {
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error!(
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"Version compatibility failure! Our Version: {}, Their Version: {}",
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Version::from_str(&std::env::var("CARGO_PKG_VERSION").unwrap()).unwrap(),
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response.version
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);
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connection_state
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.send(HandshakeFinalize { success: false })
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.await
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.map_err(|e| HandshakeError::SendError(e))?;
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Ok(())
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} else {
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connection_state
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.send(HandshakeFinalize { success: true })
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.await
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.map_err(|e| HandshakeError::SendError(e))?;
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Ok(())
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}
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}
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async fn handshake_finalize(
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Message(finalize): Message<HandshakeFinalize>,
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State(connection_state): State<ConnectionState>,
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_instance: AuthenticatedInstance,
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) -> Result<(), HandshakeError> {
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if !finalize.success {
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error!("Error during handshake, aborting connection");
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return Err(Error::from(ConnectionError::Shutdown).into());
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} else {
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connection_state.handshaked.store(true, Ordering::SeqCst);
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connection_state
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.send(HandshakeFinalize { success: true })
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.await
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.map_err(|e| HandshakeError::SendError(e))?;
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Ok(())
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}
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}
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#[derive(Debug, thiserror::Error)]
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pub enum HandshakeError {
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#[error("version mismatch during handshake, ours: {0}, theirs: {1}")]
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VersionMismatch(Version, Version),
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#[error("while sending message: {0}")]
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SendError(Error),
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#[error("{0}")]
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Other(#[from] Error),
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}
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|