common

Documentation

Overview

* Copyright (C) 2018 The DNA Authors * This file is part of The DNA library. * * The DNA 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 DNA 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 DNA. If not, see <http://www.gnu.org/licenses/>.

Index

• Constants
• func Checksum(data []byte) [CHECKSUM_LEN]byte
• func NewChecksum() hash.Hash
• func ParseIPAddr(s string) (string, error)
• func ParseIPPort(s string) (string, error)
• type AppendBlock
• type AppendHeaders
• type AppendPeerID
• type PeerAddr
• type RemovePeerID

Constants

const (
	VERIFY_NODE  = 1 //peer involved in consensus
	SERVICE_NODE = 2 //peer only sync with consensus peer
)

peer capability

const (
	PER_SEND_LEN        = 1024 * 256 //byte len per conn write
	MAX_BUF_LEN         = 1024 * 256 //the maximum buffer to receive message
	WRITE_DEADLINE      = 5          //deadline of conn write
	REQ_INTERVAL        = 3          //single request max interval in second
	MAX_REQ_RECORD_SIZE = 1000       //the maximum request record size
	MAX_RESP_CACHE_SIZE = 50         //the maximum response cache
	MAX_TX_CACHE_SIZE   = 100000     //the maximum txHash cache size
)

link and concurrent const

const (
	MSG_CMD_LEN      = 12               //msg type length in byte
	CMD_OFFSET       = 4                //cmd type offet in msg hdr
	CHECKSUM_LEN     = 4                //checksum length in byte
	MSG_HDR_LEN      = 24               //msg hdr length in byte
	MAX_BLK_HDR_CNT  = 500              //hdr count once when sync header
	MAX_INV_HDR_CNT  = 500              //inventory count once when req inv
	MAX_REQ_BLK_ONCE = 16               //req blk count once from one peer when sync blk
	MAX_MSG_LEN      = 30 * 1024 * 1024 //the maximum message length
	MAX_PAYLOAD_LEN  = MAX_MSG_LEN - MSG_HDR_LEN
)

msg cmd const

const (
	MAX_ADDR_NODE_CNT = 64 //the maximum peer address from msg
	MAX_INV_BLK_CNT   = 64 //the maximum blk hash cnt of inv msg
)

msg type const

const (
	PROTOCOL_VERSION      = 0     //protocol version
	UPDATE_RATE_PER_BLOCK = 2     //info update rate in one generate block period
	KEEPALIVE_TIMEOUT     = 15    //contact timeout in sec
	DIAL_TIMEOUT          = 6     //connect timeout in sec
	CONN_MONITOR          = 6     //time to retry connect in sec
	CONN_MAX_BACK         = 4000  //max backoff time in micro sec
	MAX_RETRY_COUNT       = 3     //max reconnect time of remote peer
	CHAN_CAPABILITY       = 10000 //channel capability of recv link
	SYNC_BLK_WAIT         = 2     //timespan for blk sync check
)

info update const

const (
	INIT        = 0 //initial
	HAND        = 1 //send verion to peer
	HAND_SHAKE  = 2 //haven`t send verion to peer and receive peer`s version
	HAND_SHAKED = 3 //send verion to peer and receive peer`s version
	ESTABLISH   = 4 //receive peer`s verack
	INACTIVITY  = 5 //link broken
)

The peer state

const (
	RECENT_TIMEOUT   = 60
	RECENT_FILE_NAME = "peers.recent"
	RECENT_LIMIT     = 10 //recent contact list limit
)

recent contact const

const (
	VERSION_TYPE     = "version"    //peer`s information
	VERACK_TYPE      = "verack"     //ack msg after version recv
	GetADDR_TYPE     = "getaddr"    //req nbr address from peer
	ADDR_TYPE        = "addr"       //nbr address
	PING_TYPE        = "ping"       //ping  sync height
	PONG_TYPE        = "pong"       //pong  recv nbr height
	GET_HEADERS_TYPE = "getheaders" //req blk hdr
	HEADERS_TYPE     = "headers"    //blk hdr
	INV_TYPE         = "inv"        //inv payload
	GET_DATA_TYPE    = "getdata"    //req data from peer
	BLOCK_TYPE       = "block"      //blk payload
	TX_TYPE          = "tx"         //transaction
	CONSENSUS_TYPE   = "consensus"  //consensus payload
	GET_BLOCKS_TYPE  = "getblocks"  //req blks from peer
	NOT_FOUND_TYPE   = "notfound"   //peer can`t find blk according to the hash
	DISCONNECT_TYPE  = "disconnect" //peer disconnect info raise by link
)

const channel msg id and type

const (
	ACTOR_TIMEOUT = 5 //actor request timeout in secs
)

actor const

const (
	HTTP_INFO_FLAG = 0 //peer`s http info bit in cap field
)

cap flag

Functions

func Checksum

func Checksum(data []byte) [CHECKSUM_LEN]byte

func NewChecksum

func NewChecksum() hash.Hash

func ParseIPAddr

func ParseIPAddr(s string) (string, error)

ParseIPAddr return ip address

func ParseIPPort

func ParseIPPort(s string) (string, error)

ParseIPPort return ip port

Types

type AppendBlock

type AppendBlock struct {
	FromID     uint64       // The peer id
	BlockSize  uint32       // Block size
	Block      *types.Block // Block to be added to the ledger
	MerkleRoot com.Uint256  // MerkleRoot
}

type AppendHeaders

type AppendHeaders struct {
	FromID  uint64          // The peer id
	Headers []*types.Header // Headers to be added to the ledger
}

type AppendPeerID

type AppendPeerID struct {
	ID uint64 // The peer id
}

type PeerAddr

type PeerAddr struct {
	Time     int64    //latest timestamp
	Services uint64   //service type
	IpAddr   [16]byte //ip address
	Port     uint16   //sync port
	//todo remove this legecy field
	ConsensusPort uint16 //consensus port
	ID            uint64 //Unique ID
}

PeerAddr represent peer`s net information

type RemovePeerID

type RemovePeerID struct {
	ID uint64 // The peer id
}