github.com/isti4github/eth-ecc@v0.0.0-20201227085832-c337f2d99319/p2p/discover/common.go (about) 1 // Copyright 2019 The go-ethereum Authors 2 // This file is part of the go-ethereum library. 3 // 4 // The go-ethereum library is free software: you can redistribute it and/or modify 5 // it under the terms of the GNU Lesser General Public License as published by 6 // the Free Software Foundation, either version 3 of the License, or 7 // (at your option) any later version. 8 // 9 // The go-ethereum library is distributed in the hope that it will be useful, 10 // but WITHOUT ANY WARRANTY; without even the implied warranty of 11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 // GNU Lesser General Public License for more details. 13 // 14 // You should have received a copy of the GNU Lesser General Public License 15 // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. 16 17 package discover 18 19 import ( 20 "crypto/ecdsa" 21 "net" 22 23 "github.com/Onther-Tech/go-ethereum/log" 24 "github.com/Onther-Tech/go-ethereum/p2p/enode" 25 "github.com/Onther-Tech/go-ethereum/p2p/netutil" 26 ) 27 28 type UDPConn interface { 29 ReadFromUDP(b []byte) (n int, addr *net.UDPAddr, err error) 30 WriteToUDP(b []byte, addr *net.UDPAddr) (n int, err error) 31 Close() error 32 LocalAddr() net.Addr 33 } 34 35 // Config holds Table-related settings. 36 type Config struct { 37 // These settings are required and configure the UDP listener: 38 PrivateKey *ecdsa.PrivateKey 39 40 // These settings are optional: 41 NetRestrict *netutil.Netlist // network whitelist 42 Bootnodes []*enode.Node // list of bootstrap nodes 43 Unhandled chan<- ReadPacket // unhandled packets are sent on this channel 44 Log log.Logger // if set, log messages go here 45 } 46 47 // ListenUDP starts listening for discovery packets on the given UDP socket. 48 func ListenUDP(c UDPConn, ln *enode.LocalNode, cfg Config) (*UDPv4, error) { 49 return ListenV4(c, ln, cfg) 50 } 51 52 // ReadPacket is a packet that couldn't be handled. Those packets are sent to the unhandled 53 // channel if configured. 54 type ReadPacket struct { 55 Data []byte 56 Addr *net.UDPAddr 57 }