120 lines
3.0 KiB
Go
120 lines
3.0 KiB
Go
// Copyright 2014 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package p2p
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import (
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"errors"
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"fmt"
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)
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const (
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errInvalidMsgCode = iota
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errInvalidMsg
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)
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var errorToString = map[int]string{
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errInvalidMsgCode: "invalid message code",
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errInvalidMsg: "invalid message",
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}
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type peerError struct {
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code int
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message string
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}
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func newPeerError(code int, format string, v ...interface{}) *peerError {
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desc, ok := errorToString[code]
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if !ok {
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panic("invalid error code")
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}
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err := &peerError{code, desc}
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if format != "" {
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err.message += ": " + fmt.Sprintf(format, v...)
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}
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return err
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}
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func (pe *peerError) Error() string {
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return pe.message
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}
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var errProtocolReturned = errors.New("protocol returned")
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type DiscReason uint8
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const (
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DiscRequested DiscReason = iota
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DiscNetworkError
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DiscProtocolError
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DiscUselessPeer
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DiscTooManyPeers
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DiscAlreadyConnected
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DiscIncompatibleVersion
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DiscInvalidIdentity
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DiscQuitting
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DiscUnexpectedIdentity
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DiscSelf
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DiscReadTimeout
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DiscSubprotocolError = DiscReason(0x10)
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)
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var discReasonToString = [...]string{
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DiscRequested: "disconnect requested",
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DiscNetworkError: "network error",
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DiscProtocolError: "breach of protocol",
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DiscUselessPeer: "useless peer",
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DiscTooManyPeers: "too many peers",
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DiscAlreadyConnected: "already connected",
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DiscIncompatibleVersion: "incompatible p2p protocol version",
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DiscInvalidIdentity: "invalid node identity",
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DiscQuitting: "client quitting",
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DiscUnexpectedIdentity: "unexpected identity",
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DiscSelf: "connected to self",
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DiscReadTimeout: "read timeout",
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DiscSubprotocolError: "subprotocol error",
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}
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func (d DiscReason) String() string {
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if len(discReasonToString) <= int(d) {
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return fmt.Sprintf("unknown disconnect reason %d", d)
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}
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return discReasonToString[d]
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}
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func (d DiscReason) Error() string {
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return d.String()
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}
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func discReasonForError(err error) DiscReason {
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if reason, ok := err.(DiscReason); ok {
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return reason
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}
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if err == errProtocolReturned {
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return DiscQuitting
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}
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peerError, ok := err.(*peerError)
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if ok {
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switch peerError.code {
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case errInvalidMsgCode, errInvalidMsg:
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return DiscProtocolError
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default:
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return DiscSubprotocolError
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}
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}
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return DiscSubprotocolError
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}
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