88 lines
2.2 KiB
Go
88 lines
2.2 KiB
Go
// Copyright 2023 The go-ethereum Authors
|
|
// This file is part of go-ethereum.
|
|
//
|
|
// go-ethereum 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.
|
|
//
|
|
// go-ethereum 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 go-ethereum. If not, see <http://www.gnu.org/licenses/>.
|
|
package ethtest
|
|
|
|
import (
|
|
"github.com/ethereum/go-ethereum/p2p"
|
|
"github.com/ethereum/go-ethereum/rlp"
|
|
)
|
|
|
|
// Unexported devp2p message codes from p2p/peer.go.
|
|
const (
|
|
handshakeMsg = 0x00
|
|
discMsg = 0x01
|
|
pingMsg = 0x02
|
|
pongMsg = 0x03
|
|
)
|
|
|
|
// Unexported devp2p protocol lengths from p2p package.
|
|
const (
|
|
baseProtoLen = 16
|
|
ethProtoLen = 17
|
|
snapProtoLen = 8
|
|
)
|
|
|
|
// Unexported handshake structure from p2p/peer.go.
|
|
type protoHandshake struct {
|
|
Version uint64
|
|
Name string
|
|
Caps []p2p.Cap
|
|
ListenPort uint64
|
|
ID []byte
|
|
Rest []rlp.RawValue `rlp:"tail"`
|
|
}
|
|
|
|
type Hello = protoHandshake
|
|
|
|
// Proto is an enum representing devp2p protocol types.
|
|
type Proto int
|
|
|
|
const (
|
|
baseProto Proto = iota
|
|
ethProto
|
|
snapProto
|
|
)
|
|
|
|
// getProto returns the protocol a certain message code is associated with
|
|
// (assuming the negotiated capabilities are exactly {eth,snap})
|
|
func getProto(code uint64) Proto {
|
|
switch {
|
|
case code < baseProtoLen:
|
|
return baseProto
|
|
case code < baseProtoLen+ethProtoLen:
|
|
return ethProto
|
|
case code < baseProtoLen+ethProtoLen+snapProtoLen:
|
|
return snapProto
|
|
default:
|
|
panic("unhandled msg code beyond last protocol")
|
|
}
|
|
}
|
|
|
|
// protoOffset will return the offset at which the specified protocol's messages
|
|
// begin.
|
|
func protoOffset(proto Proto) uint64 {
|
|
switch proto {
|
|
case baseProto:
|
|
return 0
|
|
case ethProto:
|
|
return baseProtoLen
|
|
case snapProto:
|
|
return baseProtoLen + ethProtoLen
|
|
default:
|
|
panic("unhandled protocol")
|
|
}
|
|
}
|