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|
package p2p
import (
"fmt"
)
const (
errMagicTokenMismatch = iota
errRead
errWrite
errMisc
errInvalidMsgCode
errInvalidMsg
errP2PVersionMismatch
errPubkeyMissing
errPubkeyInvalid
errPubkeyForbidden
errProtocolBreach
errPingTimeout
errInvalidNetworkId
errInvalidProtocolVersion
)
var errorToString = map[int]string{
errMagicTokenMismatch: "Magic token mismatch",
errRead: "Read error",
errWrite: "Write error",
errMisc: "Misc error",
errInvalidMsgCode: "Invalid message code",
errInvalidMsg: "Invalid message",
errP2PVersionMismatch: "P2P Version Mismatch",
errPubkeyMissing: "Public key missing",
errPubkeyInvalid: "Public key invalid",
errPubkeyForbidden: "Public key forbidden",
errProtocolBreach: "Protocol Breach",
errPingTimeout: "Ping timeout",
errInvalidNetworkId: "Invalid network id",
errInvalidProtocolVersion: "Invalid protocol version",
}
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 (self *peerError) Error() string {
return self.message
}
type DiscReason byte
const (
DiscRequested DiscReason = 0x00
DiscNetworkError = 0x01
DiscProtocolError = 0x02
DiscUselessPeer = 0x03
DiscTooManyPeers = 0x04
DiscAlreadyConnected = 0x05
DiscIncompatibleVersion = 0x06
DiscInvalidIdentity = 0x07
DiscQuitting = 0x08
DiscUnexpectedIdentity = 0x09
DiscSelf = 0x0a
DiscReadTimeout = 0x0b
DiscSubprotocolError = 0x10
)
var discReasonToString = [DiscSubprotocolError + 1]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 Reason(%d)", d)
}
return discReasonToString[d]
}
type discRequestedError DiscReason
func (err discRequestedError) Error() string {
return fmt.Sprintf("disconnect requested: %v", DiscReason(err))
}
func discReasonForError(err error) DiscReason {
if reason, ok := err.(discRequestedError); ok {
return DiscReason(reason)
}
peerError, ok := err.(*peerError)
if !ok {
return DiscSubprotocolError
}
switch peerError.Code {
case errP2PVersionMismatch:
return DiscIncompatibleVersion
case errPubkeyMissing, errPubkeyInvalid:
return DiscInvalidIdentity
case errPubkeyForbidden:
return DiscUselessPeer
case errInvalidMsgCode, errMagicTokenMismatch, errProtocolBreach:
return DiscProtocolError
case errPingTimeout:
return DiscReadTimeout
case errRead, errWrite, errMisc:
return DiscNetworkError
default:
return DiscSubprotocolError
}
}
|
