2016-10-10 02:56:01 -07:00
|
|
|
use std::io;
|
|
|
|
use std::marker::PhantomData;
|
|
|
|
use futures::{Poll, Future, Async};
|
2017-03-25 02:05:49 -07:00
|
|
|
use tokio_io::AsyncRead;
|
2016-11-25 09:38:21 -08:00
|
|
|
use network::Magic;
|
|
|
|
use message::{MessageResult, Error, Payload};
|
2016-10-12 02:24:56 -07:00
|
|
|
use io::{read_header, ReadHeader, read_payload, ReadPayload};
|
2016-10-10 02:56:01 -07:00
|
|
|
|
2018-05-17 23:54:06 -07:00
|
|
|
pub fn read_message<M, A>(a: A, flags: u32, magic: Magic, version: u32) -> ReadMessage<M, A>
|
2017-03-25 02:05:49 -07:00
|
|
|
where A: AsyncRead, M: Payload {
|
2016-10-12 02:24:56 -07:00
|
|
|
ReadMessage {
|
2016-10-10 02:56:01 -07:00
|
|
|
state: ReadMessageState::ReadHeader {
|
|
|
|
version: version,
|
2018-05-17 23:54:06 -07:00
|
|
|
future: read_header(a, flags, magic),
|
2016-10-10 02:56:01 -07:00
|
|
|
},
|
2018-05-17 23:54:06 -07:00
|
|
|
flags: flags,
|
|
|
|
message_type: PhantomData,
|
2016-10-10 02:56:01 -07:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
enum ReadMessageState<M, A> {
|
|
|
|
ReadHeader {
|
|
|
|
version: u32,
|
|
|
|
future: ReadHeader<A>,
|
|
|
|
},
|
|
|
|
ReadPayload {
|
2016-10-12 02:24:56 -07:00
|
|
|
future: ReadPayload<M, A>,
|
2016-10-10 02:56:01 -07:00
|
|
|
},
|
|
|
|
}
|
|
|
|
|
2016-10-12 02:24:56 -07:00
|
|
|
pub struct ReadMessage<M, A> {
|
2016-10-10 02:56:01 -07:00
|
|
|
state: ReadMessageState<M, A>,
|
2018-05-17 23:54:06 -07:00
|
|
|
flags: u32,
|
2016-10-10 02:56:01 -07:00
|
|
|
message_type: PhantomData<M>,
|
|
|
|
}
|
|
|
|
|
2017-03-25 02:05:49 -07:00
|
|
|
impl<M, A> Future for ReadMessage<M, A> where A: AsyncRead, M: Payload {
|
2016-10-10 02:56:01 -07:00
|
|
|
type Item = (A, MessageResult<M>);
|
|
|
|
type Error = io::Error;
|
|
|
|
|
|
|
|
fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
|
2017-08-04 05:05:58 -07:00
|
|
|
loop {
|
|
|
|
let next_state = match self.state {
|
|
|
|
ReadMessageState::ReadHeader { version, ref mut future } => {
|
|
|
|
let (read, header) = try_ready!(future.poll());
|
|
|
|
let header = match header {
|
|
|
|
Ok(header) => header,
|
|
|
|
Err(err) => return Ok((read, Err(err)).into()),
|
|
|
|
};
|
2018-05-18 03:43:13 -07:00
|
|
|
|
2017-08-04 05:05:58 -07:00
|
|
|
if header.command != M::command() {
|
|
|
|
return Ok((read, Err(Error::InvalidCommand)).into());
|
|
|
|
}
|
|
|
|
let future = read_payload(
|
2018-05-17 23:54:06 -07:00
|
|
|
read, version, self.flags, header.len as usize, header.checksum,
|
2017-08-04 05:05:58 -07:00
|
|
|
);
|
|
|
|
ReadMessageState::ReadPayload {
|
|
|
|
future: future,
|
|
|
|
}
|
|
|
|
},
|
|
|
|
ReadMessageState::ReadPayload { ref mut future } => {
|
|
|
|
let (read, payload) = try_ready!(future.poll());
|
|
|
|
return Ok(Async::Ready((read, payload)));
|
|
|
|
},
|
|
|
|
};
|
|
|
|
self.state = next_state;
|
2016-10-10 02:56:01 -07:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2016-10-28 05:59:58 -07:00
|
|
|
|
|
|
|
#[cfg(test)]
|
|
|
|
mod tests {
|
|
|
|
use futures::Future;
|
|
|
|
use bytes::Bytes;
|
2017-11-01 02:30:15 -07:00
|
|
|
use network::{Network, ConsensusFork};
|
2016-11-25 09:38:21 -08:00
|
|
|
use message::Error;
|
2016-10-28 05:59:58 -07:00
|
|
|
use message::types::{Ping, Pong};
|
|
|
|
use super::read_message;
|
|
|
|
|
|
|
|
#[test]
|
|
|
|
fn test_read_message() {
|
|
|
|
let raw: Bytes = "f9beb4d970696e6700000000000000000800000083c00c765845303b6da97786".into();
|
|
|
|
let ping = Ping::new(u64::from_str_radix("8677a96d3b304558", 16).unwrap());
|
2018-05-17 23:54:06 -07:00
|
|
|
assert_eq!(read_message(raw.as_ref(), 0, Network::Mainnet.magic(&ConsensusFork::BitcoinCore), 0).wait().unwrap().1, Ok(ping));
|
|
|
|
assert_eq!(read_message::<Ping, _>(raw.as_ref(), 0, Network::Testnet.magic(&ConsensusFork::BitcoinCore), 0).wait().unwrap().1, Err(Error::InvalidMagic));
|
|
|
|
assert_eq!(read_message::<Pong, _>(raw.as_ref(), 0, Network::Mainnet.magic(&ConsensusFork::BitcoinCore), 0).wait().unwrap().1, Err(Error::InvalidCommand));
|
2016-10-28 05:59:58 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
#[test]
|
|
|
|
fn test_read_too_short_message() {
|
|
|
|
let raw: Bytes = "f9beb4d970696e6700000000000000000800000083c00c765845303b6da977".into();
|
2018-05-17 23:54:06 -07:00
|
|
|
assert!(read_message::<Ping, _>(raw.as_ref(), 0, Network::Mainnet.magic(&ConsensusFork::BitcoinCore), 0).wait().is_err());
|
2016-10-28 05:59:58 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
#[test]
|
|
|
|
fn test_read_message_with_invalid_checksum() {
|
|
|
|
let raw: Bytes = "f9beb4d970696e6700000000000000000800000083c01c765845303b6da97786".into();
|
2018-05-17 23:54:06 -07:00
|
|
|
assert_eq!(read_message::<Ping, _>(raw.as_ref(), 0, Network::Mainnet.magic(&ConsensusFork::BitcoinCore), 0).wait().unwrap().1, Err(Error::InvalidChecksum));
|
2016-10-28 05:59:58 -07:00
|
|
|
}
|
|
|
|
}
|