openethereum/util/network/src/error.rs

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// Copyright 2015, 2016 Ethcore (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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use io::IoError;
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use rlp::*;
use util::UtilError;
use std::fmt;
use ethkey::Error as KeyError;
use crypto::Error as CryptoError;
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#[derive(Debug, Copy, Clone, PartialEq, Eq)]
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pub enum DisconnectReason
{
DisconnectRequested,
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TCPError,
BadProtocol,
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UselessPeer,
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TooManyPeers,
DuplicatePeer,
IncompatibleProtocol,
NullIdentity,
ClientQuit,
UnexpectedIdentity,
LocalIdentity,
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PingTimeout,
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Unknown,
}
impl DisconnectReason {
pub fn from_u8(n: u8) -> DisconnectReason {
match n {
0 => DisconnectReason::DisconnectRequested,
1 => DisconnectReason::TCPError,
2 => DisconnectReason::BadProtocol,
3 => DisconnectReason::UselessPeer,
4 => DisconnectReason::TooManyPeers,
5 => DisconnectReason::DuplicatePeer,
6 => DisconnectReason::IncompatibleProtocol,
7 => DisconnectReason::NullIdentity,
8 => DisconnectReason::ClientQuit,
9 => DisconnectReason::UnexpectedIdentity,
10 => DisconnectReason::LocalIdentity,
11 => DisconnectReason::PingTimeout,
_ => DisconnectReason::Unknown,
}
}
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}
impl fmt::Display for DisconnectReason {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
use self::DisconnectReason::*;
let msg = match *self {
DisconnectRequested => "disconnect requested",
TCPError => "TCP error",
BadProtocol => "bad protocol",
UselessPeer => "useless peer",
TooManyPeers => "too many peers",
DuplicatePeer => "duplicate peer",
IncompatibleProtocol => "incompatible protocol",
NullIdentity => "null identity",
ClientQuit => "client quit",
UnexpectedIdentity => "unexpected identity",
LocalIdentity => "local identity",
PingTimeout => "ping timeout",
Unknown => "unknown",
};
f.write_str(msg)
}
}
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#[derive(Debug)]
/// Network error.
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pub enum NetworkError {
/// Authentication error.
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Auth,
/// Unrecognised protocol.
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BadProtocol,
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/// Message expired.
Expired,
/// Peer not found.
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PeerNotFound,
/// Peer is diconnected.
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Disconnect(DisconnectReason),
/// Util error.
Util(UtilError),
/// Socket IO error.
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Io(IoError),
/// Error concerning the network address parsing subsystem.
AddressParse(::std::net::AddrParseError),
/// Error concerning the network address resolution subsystem.
AddressResolve(Option<::std::io::Error>),
/// Error concerning the Rust standard library's IO subsystem.
StdIo(::std::io::Error),
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}
impl fmt::Display for NetworkError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
use self::NetworkError::*;
let msg = match *self {
Auth => "Authentication failure".into(),
BadProtocol => "Bad protocol".into(),
Expired => "Expired message".into(),
PeerNotFound => "Peer not found".into(),
Disconnect(ref reason) => format!("Peer disconnected: {}", reason),
Io(ref err) => format!("Socket I/O error: {}", err),
AddressParse(ref err) => format!("{}", err),
AddressResolve(Some(ref err)) => format!("{}", err),
AddressResolve(_) => "Failed to resolve network address.".into(),
StdIo(ref err) => format!("{}", err),
Util(ref err) => format!("{}", err),
};
f.write_fmt(format_args!("Network error ({})", msg))
}
}
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impl From<DecoderError> for NetworkError {
fn from(_err: DecoderError) -> NetworkError {
NetworkError::Auth
}
}
impl From<::std::io::Error> for NetworkError {
fn from(err: ::std::io::Error) -> NetworkError {
NetworkError::StdIo(err)
}
}
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impl From<IoError> for NetworkError {
fn from(err: IoError) -> NetworkError {
NetworkError::Io(err)
}
}
impl From<UtilError> for NetworkError {
fn from(err: UtilError) -> NetworkError {
NetworkError::Util(err)
}
}
impl From<KeyError> for NetworkError {
fn from(_err: KeyError) -> Self {
NetworkError::Auth
}
}
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impl From<CryptoError> for NetworkError {
fn from(_err: CryptoError) -> NetworkError {
NetworkError::Auth
}
}
impl From<::std::net::AddrParseError> for NetworkError {
fn from(err: ::std::net::AddrParseError) -> NetworkError {
NetworkError::AddressParse(err)
}
}
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#[test]
fn test_errors() {
assert_eq!(DisconnectReason::ClientQuit, DisconnectReason::from_u8(8));
let mut r = DisconnectReason::DisconnectRequested;
for i in 0 .. 20 {
r = DisconnectReason::from_u8(i);
}
assert_eq!(DisconnectReason::Unknown, r);
match <NetworkError as From<DecoderError>>::from(DecoderError::RlpIsTooBig) {
NetworkError::Auth => {},
_ => panic!("Unexpeceted error"),
}
match <NetworkError as From<CryptoError>>::from(CryptoError::InvalidMessage) {
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NetworkError::Auth => {},
_ => panic!("Unexpeceted error"),
}
}