| 1 |
use std::{str::FromStr, sync::atomic::Ordering};
|
| 2 |
|
| 3 |
use anyhow::Error;
|
| 4 |
use semver::Version;
|
| 5 |
|
| 6 |
use crate::{
|
| 7 |
connection::ConnectionError,
|
| 8 |
messages::handshake::{HandshakeFinalize, HandshakeResponse, InitiateHandshake},
|
| 9 |
model::authenticated::{Message, MessageHandler, NetworkMessage, State},
|
| 10 |
validate_version, version,
|
| 11 |
};
|
| 12 |
|
| 13 |
use super::{wrapper::ConnectionState, HandlerUnhandled};
|
| 14 |
|
| 15 |
pub async fn handshake_handle(
|
| 16 |
message: &NetworkMessage,
|
| 17 |
state: &ConnectionState,
|
| 18 |
) -> Result<(), Error> {
|
| 19 |
if initiate_handshake
|
| 20 |
.handle_message(&message, state)
|
| 21 |
.await
|
| 22 |
.is_ok()
|
| 23 |
{
|
| 24 |
Ok(())
|
| 25 |
} else if handshake_response
|
| 26 |
.handle_message(&message, state)
|
| 27 |
.await
|
| 28 |
.is_ok()
|
| 29 |
{
|
| 30 |
Ok(())
|
| 31 |
} else if handshake_finalize
|
| 32 |
.handle_message(&message, state)
|
| 33 |
.await
|
| 34 |
.is_ok()
|
| 35 |
{
|
| 36 |
Ok(())
|
| 37 |
} else {
|
| 38 |
Err(Error::from(HandlerUnhandled))
|
| 39 |
}
|
| 40 |
}
|
| 41 |
|
| 42 |
async fn initiate_handshake(
|
| 43 |
Message(initiation): Message<InitiateHandshake>,
|
| 44 |
State(connection_state): State<ConnectionState>,
|
| 45 |
) -> Result<(), HandshakeError> {
|
| 46 |
if !validate_version(&initiation.version) {
|
| 47 |
error!(
|
| 48 |
"Version compatibility failure! Our Version: {}, Their Version: {}",
|
| 49 |
Version::from_str(&std::env::var("CARGO_PKG_VERSION").unwrap()).unwrap(),
|
| 50 |
initiation.version
|
| 51 |
);
|
| 52 |
|
| 53 |
connection_state
|
| 54 |
.send(HandshakeFinalize { success: false })
|
| 55 |
.await
|
| 56 |
.map_err(|e| HandshakeError::SendError(e))?;
|
| 57 |
|
| 58 |
Ok(())
|
| 59 |
} else {
|
| 60 |
connection_state
|
| 61 |
.send(HandshakeResponse {
|
| 62 |
identity: connection_state.instance.clone(),
|
| 63 |
version: version(),
|
| 64 |
})
|
| 65 |
.await
|
| 66 |
.map_err(|e| HandshakeError::SendError(e))?;
|
| 67 |
|
| 68 |
Ok(())
|
| 69 |
}
|
| 70 |
}
|
| 71 |
|
| 72 |
async fn handshake_response(
|
| 73 |
Message(response): Message<HandshakeResponse>,
|
| 74 |
State(connection_state): State<ConnectionState>,
|
| 75 |
) -> Result<(), HandshakeError> {
|
| 76 |
if !validate_version(&response.version) {
|
| 77 |
error!(
|
| 78 |
"Version compatibility failure! Our Version: {}, Their Version: {}",
|
| 79 |
Version::from_str(&std::env::var("CARGO_PKG_VERSION").unwrap()).unwrap(),
|
| 80 |
response.version
|
| 81 |
);
|
| 82 |
|
| 83 |
connection_state
|
| 84 |
.send(HandshakeFinalize { success: false })
|
| 85 |
.await
|
| 86 |
.map_err(|e| HandshakeError::SendError(e))?;
|
| 87 |
|
| 88 |
Ok(())
|
| 89 |
} else {
|
| 90 |
connection_state
|
| 91 |
.send(HandshakeFinalize { success: true })
|
| 92 |
.await
|
| 93 |
.map_err(|e| HandshakeError::SendError(e))?;
|
| 94 |
|
| 95 |
Ok(())
|
| 96 |
}
|
| 97 |
}
|
| 98 |
|
| 99 |
async fn handshake_finalize(
|
| 100 |
Message(finalize): Message<HandshakeFinalize>,
|
| 101 |
State(connection_state): State<ConnectionState>,
|
| 102 |
) -> Result<(), HandshakeError> {
|
| 103 |
if !finalize.success {
|
| 104 |
error!("Error during handshake, aborting connection");
|
| 105 |
return Err(Error::from(ConnectionError::Shutdown).into());
|
| 106 |
} else {
|
| 107 |
connection_state.handshaked.store(true, Ordering::SeqCst);
|
| 108 |
|
| 109 |
connection_state
|
| 110 |
.send(HandshakeFinalize { success: true })
|
| 111 |
.await
|
| 112 |
.map_err(|e| HandshakeError::SendError(e))?;
|
| 113 |
|
| 114 |
Ok(())
|
| 115 |
}
|
| 116 |
}
|
| 117 |
|
| 118 |
#[derive(Debug, thiserror::Error)]
|
| 119 |
pub enum HandshakeError {
|
| 120 |
#[error("version mismatch during handshake, ours: {0}, theirs: {1}")]
|
| 121 |
VersionMismatch(Version, Version),
|
| 122 |
#[error("while sending message: {0}")]
|
| 123 |
SendError(Error),
|
| 124 |
#[error("{0}")]
|
| 125 |
Other(#[from] Error),
|
| 126 |
}
|
| 127 |
|