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Remove encoding error and redundant code

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Age Manning 2019-07-24 15:17:44 +10:00
parent 89ff7fb6b8
commit 7d38cba252
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GPG Key ID: 05EED64B79E06A93
4 changed files with 0 additions and 246 deletions
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1
beacon_node/eth2-libp2p/src/rpc/codec/ssz.rs
View File

@ -47,7 +47,6 @@ impl Encoder for SSZInboundCodec {
RPCResponse::BeaconChainState(res) => res.as_ssz_bytes(),
}
}
RPCErrorResponse::EncodingError => vec![],
RPCErrorResponse::InvalidRequest(err) => err.as_ssz_bytes(),
RPCErrorResponse::ServerError(err) => err.as_ssz_bytes(),
RPCErrorResponse::Unknown(err) => err.as_ssz_bytes(),

2
beacon_node/eth2-libp2p/src/rpc/methods.rs
View File

@ -196,7 +196,6 @@ pub enum RPCResponse {
#[derive(Debug)]
pub enum RPCErrorResponse {
Success(RPCResponse),
EncodingError,
InvalidRequest(ErrorMessage),
ServerError(ErrorMessage),
Unknown(ErrorMessage),
@ -207,7 +206,6 @@ impl RPCErrorResponse {
pub fn as_u8(&self) -> u8 {
match self {
RPCErrorResponse::Success(_) => 0,
RPCErrorResponse::EncodingError => 1,
RPCErrorResponse::InvalidRequest(_) => 2,
RPCErrorResponse::ServerError(_) => 3,
RPCErrorResponse::Unknown(_) => 255,

1
beacon_node/eth2-libp2p/src/rpc/protocol.rs
View File

@ -38,7 +38,6 @@ impl UpgradeInfo for RPCProtocol {
ProtocolId::new("beacon_block_roots", "1.0.0", "ssz").into(),
ProtocolId::new("beacon_block_headers", "1.0.0", "ssz").into(),
ProtocolId::new("beacon_block_bodies", "1.0.0", "ssz").into(),
ProtocolId::new("beacon_chain_state", "1.0.0", "ssz").into(),
]
}
}

242
beacon_node/eth2-libp2p/src/rpc/request_response.rs
View File

@ -1,242 +0,0 @@
use super::protocol::{ProtocolId, RPCError, RPCResponse, ResponseCode};
use futures::prelude::*;
use futures::try_ready;
use libp2p::core::upgrade::{read_one, ReadOne, ReadOneError};
use std::mem;
use tokio_io::{io, AsyncRead, AsyncWrite};
/// Sends a message over a socket, waits for a response code, then optionally waits for a response.
///
/// The response code is a 1-byte code which determines whether the request succeeded or not.
/// Depending on the response-code, an error may be returned. On success, a response is then
/// retrieved if required.
/// This function also gives an option to terminate the socket and return a default value, allowing for
/// one-shot requests.
///
/// The `short_circuit_return` parameter, if specified, returns the value without awaiting for a
/// response to a request and performing the logic in `then`.
#[inline]
pub fn rpc_request_response<TSocket, TData>(
socket: TSocket,
data: TData, // data sent as a request
max_size: usize, // maximum bytes to read in a response
short_circuit_return: Option<RPCResponse>, // default value to return right after a request, do not wait for a response
protocol: ProtocolId, // the protocol being negotiated
) -> RPCRequestResponse<TSocket, TData>
where
TSocket: AsyncRead + AsyncWrite,
TData: AsRef<[u8]>,
{
RPCRequestResponse {
protocol,
inner: RPCRequestResponseInner::Write(
write_one(socket, data).inner,
max_size,
short_circuit_return,
),
}
}
/// Future that makes `rpc_request_response` work.
pub struct RPCRequestResponse<TSocket, TData = Vec<u8>> {
protocol: ProtocolId,
inner: RPCRequestResponseInner<TSocket, TData>,
}
enum RPCRequestResponseInner<TSocket, TData> {
// We need to write data to the socket.
Write(WriteOneInner<TSocket, TData>, usize, Option<RPCResponse>),
// We need to read the response code.
ReadResponseCode(io::ReadExact<TSocket, io::Window<Vec<u8>>>, usize),
// We need to read a final data packet. The second parameter is the response code
Read(ReadOne<TSocket>, ResponseCode),
// An error happened during the processing.
Poisoned,
}
impl<TSocket, TData> Future for RPCRequestResponse<TSocket, TData>
where
TSocket: AsyncRead + AsyncWrite,
TData: AsRef<[u8]>,
{
type Item = RPCResponse;
type Error = RPCError;
fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
loop {
match mem::replace(&mut self.inner, RPCRequestResponseInner::Poisoned) {
RPCRequestResponseInner::Write(mut inner, max_size, sc_return) => {
match inner.poll().map_err(ReadOneError::Io)? {
Async::Ready(socket) => {
// short-circuit the future if `short_circuit_return` is specified
if let Some(return_val) = sc_return {
return Ok(Async::Ready(return_val));
}
// begin reading the 1-byte response code
let mut data_buf = vec![0; 1];
let mut data_buf = io::Window::new(data_buf);
self.inner = RPCRequestResponseInner::ReadResponseCode(
io::read_exact(socket, data_buf),
max_size,
);
}
Async::NotReady => {
self.inner = RPCRequestResponseInner::Write(inner, max_size, sc_return);
return Ok(Async::NotReady);
}
}
}
RPCRequestResponseInner::ReadResponseCode(mut inner, max_size) => {
match inner.poll()? {
Async::Ready((socket, data)) => {
let resp_code_byte = [0; 1];
// data must be only 1-byte - this cannot panic
resp_code_byte.copy_from_slice(&data.into_inner());
let response_code =
ResponseCode::from(u8::from_be_bytes(resp_code_byte));
// known response codes
match response_code {
ResponseCode::Success
| ResponseCode::InvalidRequest
| ResponseCode::ServerError => {
// need to read another packet
self.inner = RPCRequestResponseInner::Read(
read_one(socket, max_size),
response_code,
)
}
ResponseCode::EncodingError => {
// invalid encoding
let response = RPCResponse::Error("Invalid Encoding".into());
return Ok(Async::Ready(response));
}
ResponseCode::Unknown => {
// unknown response code
let response = RPCResponse::Error(format!(
"Unknown response code: {}",
(response_code as u8)
));
return Ok(Async::Ready(response));
}
}
}
Async::NotReady => {
self.inner = RPCRequestResponseInner::ReadResponseCode(inner, max_size);
return Ok(Async::NotReady);
}
}
}
RPCRequestResponseInner::Read(mut inner, response_code) => match inner.poll()? {
Async::Ready(packet) => {
return Ok(Async::Ready(RPCResponse::decode(
packet,
self.protocol,
response_code,
)?))
}
Async::NotReady => {
self.inner = RPCRequestResponseInner::Read(inner, response_code);
return Ok(Async::NotReady);
}
},
RPCRequestResponseInner::Poisoned => panic!(),
};
}
}
}
/* Copied from rust-libp2p (https://github.com/libp2p/rust-libp2p) to access private members */
/// Send a message to the given socket, then shuts down the writing side.
///
/// > **Note**: Prepends a variable-length prefix indicate the length of the message. This is
/// > compatible with what `read_one` expects.
#[inline]
pub fn write_one<TSocket, TData>(socket: TSocket, data: TData) -> WriteOne<TSocket, TData>
where
TSocket: AsyncWrite,
TData: AsRef<[u8]>,
{
let len_data = build_int_buffer(data.as_ref().len());
WriteOne {
inner: WriteOneInner::WriteLen(io::write_all(socket, len_data), data),
}
}
enum WriteOneInner<TSocket, TData> {
/// We need to write the data length to the socket.
WriteLen(io::WriteAll<TSocket, io::Window<[u8; 10]>>, TData),
/// We need to write the actual data to the socket.
Write(io::WriteAll<TSocket, TData>),
/// We need to shut down the socket.
Shutdown(io::Shutdown<TSocket>),
/// A problem happened during the processing.
Poisoned,
}
impl<TSocket, TData> Future for WriteOneInner<TSocket, TData>
where
TSocket: AsyncWrite,
TData: AsRef<[u8]>,
{
type Item = TSocket;
type Error = std::io::Error;
fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
loop {
match mem::replace(self, WriteOneInner::Poisoned) {
WriteOneInner::WriteLen(mut inner, data) => match inner.poll()? {
Async::Ready((socket, _)) => {
*self = WriteOneInner::Write(io::write_all(socket, data));
}
Async::NotReady => {
*self = WriteOneInner::WriteLen(inner, data);
}
},
WriteOneInner::Write(mut inner) => match inner.poll()? {
Async::Ready((socket, _)) => {
*self = WriteOneInner::Shutdown(tokio_io::io::shutdown(socket));
}
Async::NotReady => {
*self = WriteOneInner::Write(inner);
}
},
WriteOneInner::Shutdown(ref mut inner) => {
let socket = try_ready!(inner.poll());
return Ok(Async::Ready(socket));
}
WriteOneInner::Poisoned => panic!(),
}
}
}
}
/// Builds a buffer that contains the given integer encoded as variable-length.
fn build_int_buffer(num: usize) -> io::Window<[u8; 10]> {
let mut len_data = unsigned_varint::encode::u64_buffer();
let encoded_len = unsigned_varint::encode::u64(num as u64, &mut len_data).len();
let mut len_data = io::Window::new(len_data);
len_data.set_end(encoded_len);
len_data
}
/// Future that makes `write_one` work.
struct WriteOne<TSocket, TData = Vec<u8>> {
inner: WriteOneInner<TSocket, TData>,
}
impl<TSocket, TData> Future for WriteOne<TSocket, TData>
where
TSocket: AsyncWrite,
TData: AsRef<[u8]>,
{
type Item = ();
type Error = std::io::Error;
#[inline]
fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
Ok(self.inner.poll()?.map(|_socket| ()))
}
}