|
|
|
// Copyright 2014 The go-ethereum Authors
|
|
|
|
// This file is part of the go-ethereum library.
|
|
|
|
//
|
|
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
|
|
// (at your option) any later version.
|
|
|
|
//
|
|
|
|
// The go-ethereum library 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 Lesser General Public License for more details.
|
|
|
|
//
|
|
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
|
|
|
|
package p2p
|
|
|
|
|
|
|
|
import (
|
|
|
|
"errors"
|
|
|
|
"fmt"
|
|
|
|
)
|
|
|
|
|
|
|
|
const (
|
|
|
|
errInvalidMsgCode = iota
|
|
|
|
errInvalidMsg
|
|
|
|
)
|
|
|
|
|
|
|
|
var errorToString = map[int]string{
|
|
|
|
errInvalidMsgCode: "invalid message code",
|
|
|
|
errInvalidMsg: "invalid message",
|
|
|
|
}
|
|
|
|
|
|
|
|
type peerError struct {
|
|
|
|
code int
|
|
|
|
message string
|
|
|
|
}
|
|
|
|
|
|
|
|
func newPeerError(code int, format string, v ...interface{}) *peerError {
|
|
|
|
desc, ok := errorToString[code]
|
|
|
|
if !ok {
|
|
|
|
panic("invalid error code")
|
|
|
|
}
|
|
|
|
err := &peerError{code, desc}
|
|
|
|
if format != "" {
|
|
|
|
err.message += ": " + fmt.Sprintf(format, v...)
|
|
|
|
}
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
|
|
|
|
func (pe *peerError) Error() string {
|
|
|
|
return pe.message
|
|
|
|
}
|
|
|
|
|
|
|
|
var errProtocolReturned = errors.New("protocol returned")
|
|
|
|
|
|
|
|
type DiscReason uint8
|
|
|
|
|
|
|
|
const (
|
|
|
|
DiscRequested DiscReason = iota
|
|
|
|
DiscNetworkError
|
|
|
|
DiscProtocolError
|
|
|
|
DiscUselessPeer
|
|
|
|
DiscTooManyPeers
|
|
|
|
DiscAlreadyConnected
|
|
|
|
DiscIncompatibleVersion
|
|
|
|
DiscInvalidIdentity
|
|
|
|
DiscQuitting
|
|
|
|
DiscUnexpectedIdentity
|
|
|
|
DiscSelf
|
|
|
|
DiscReadTimeout
|
|
|
|
DiscSubprotocolError = 0x10
|
|
|
|
)
|
|
|
|
|
|
|
|
var discReasonToString = [...]string{
|
|
|
|
DiscRequested: "disconnect requested",
|
|
|
|
DiscNetworkError: "network error",
|
|
|
|
DiscProtocolError: "breach of protocol",
|
|
|
|
DiscUselessPeer: "useless peer",
|
|
|
|
DiscTooManyPeers: "too many peers",
|
|
|
|
DiscAlreadyConnected: "already connected",
|
|
|
|
DiscIncompatibleVersion: "incompatible p2p protocol version",
|
|
|
|
DiscInvalidIdentity: "invalid node identity",
|
|
|
|
DiscQuitting: "client quitting",
|
|
|
|
DiscUnexpectedIdentity: "unexpected identity",
|
|
|
|
DiscSelf: "connected to self",
|
|
|
|
DiscReadTimeout: "read timeout",
|
|
|
|
DiscSubprotocolError: "subprotocol error",
|
|
|
|
}
|
|
|
|
|
|
|
|
func (d DiscReason) String() string {
|
|
|
|
if len(discReasonToString) <= int(d) {
|
|
|
|
return fmt.Sprintf("unknown disconnect reason %d", d)
|
|
|
|
}
|
|
|
|
return discReasonToString[d]
|
|
|
|
}
|
|
|
|
|
|
|
|
func (d DiscReason) Error() string {
|
|
|
|
return d.String()
|
|
|
|
}
|
|
|
|
|
|
|
|
func discReasonForError(err error) DiscReason {
|
|
|
|
if reason, ok := err.(DiscReason); ok {
|
|
|
|
return reason
|
|
|
|
}
|
|
|
|
if err == errProtocolReturned {
|
|
|
|
return DiscQuitting
|
|
|
|
}
|
|
|
|
peerError, ok := err.(*peerError)
|
|
|
|
if ok {
|
|
|
|
switch peerError.code {
|
|
|
|
case errInvalidMsgCode, errInvalidMsg:
|
|
|
|
return DiscProtocolError
|
|
|
|
default:
|
|
|
|
return DiscSubprotocolError
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return DiscSubprotocolError
|
|
|
|
}
|