1292 lines
45 KiB
Nim
1292 lines
45 KiB
Nim
import
|
|
# Std lib
|
|
std/[typetraits, strutils, os, algorithm, sequtils, math, sets],
|
|
std/options as stdOptions,
|
|
|
|
# Status libs
|
|
stew/[varints, base58, base64, endians2, results, byteutils], bearssl,
|
|
stew/shims/net as stewNet,
|
|
stew/shims/[macros, tables],
|
|
faststreams/[inputs, outputs, buffers], snappy, snappy/framing,
|
|
json_serialization, json_serialization/std/[net, options],
|
|
chronos, chronicles, metrics,
|
|
# TODO: create simpler to use libp2p modules that use re-exports
|
|
libp2p/[switch, standard_setup, peerinfo,
|
|
multiaddress, multicodec, crypto/crypto, crypto/secp,
|
|
protocols/identify, protocols/protocol],
|
|
libp2p/protocols/secure/[secure, secio],
|
|
libp2p/protocols/pubsub/[pubsub, floodsub, rpc/message, rpc/messages],
|
|
libp2p/transports/tcptransport,
|
|
libp2p/stream/lpstream,
|
|
eth/[keys, async_utils], eth/p2p/p2p_protocol_dsl,
|
|
eth/net/nat, eth/p2p/discoveryv5/[enr, node],
|
|
# Beacon node modules
|
|
version, conf, eth2_discovery, libp2p_json_serialization, conf,
|
|
ssz/ssz_serialization,
|
|
peer_pool, spec/[datatypes, network], ./time
|
|
|
|
export
|
|
version, multiaddress, peer_pool, peerinfo, p2pProtocol,
|
|
libp2p_json_serialization, ssz_serialization, results
|
|
|
|
logScope:
|
|
topics = "networking"
|
|
|
|
type
|
|
KeyPair* = crypto.KeyPair
|
|
PublicKey* = crypto.PublicKey
|
|
PrivateKey* = crypto.PrivateKey
|
|
|
|
Bytes = seq[byte]
|
|
ErrorMsg = List[byte, 256]
|
|
|
|
# TODO: This is here only to eradicate a compiler
|
|
# warning about unused import (rpc/messages).
|
|
GossipMsg = messages.Message
|
|
|
|
SeenItem* = object
|
|
peerId*: PeerID
|
|
stamp*: chronos.Moment
|
|
|
|
# TODO Is this really needed?
|
|
Eth2Node* = ref object of RootObj
|
|
switch*: Switch
|
|
discovery*: Eth2DiscoveryProtocol
|
|
wantedPeers*: int
|
|
peerPool*: PeerPool[Peer, PeerID]
|
|
protocolStates*: seq[RootRef]
|
|
libp2pTransportLoops*: seq[Future[void]]
|
|
discoveryLoop: Future[void]
|
|
metadata*: Eth2Metadata
|
|
connectTimeout*: chronos.Duration
|
|
seenThreshold*: chronos.Duration
|
|
connQueue: AsyncQueue[PeerAddr]
|
|
seenTable: Table[PeerID, SeenItem]
|
|
connWorkers: seq[Future[void]]
|
|
connTable: HashSet[PeerID]
|
|
forkId: ENRForkID
|
|
rng*: ref BrHmacDrbgContext
|
|
peers: Table[PeerID, Peer]
|
|
|
|
EthereumNode = Eth2Node # needed for the definitions in p2p_backends_helpers
|
|
|
|
Eth2MetaData* = object
|
|
seq_number*: uint64
|
|
attnets*: BitArray[ATTESTATION_SUBNET_COUNT]
|
|
|
|
ENRForkID* = object
|
|
fork_digest*: ForkDigest
|
|
next_fork_version*: Version
|
|
next_fork_epoch*: Epoch
|
|
|
|
AverageThroughput* = object
|
|
count*: uint64
|
|
average*: float
|
|
|
|
Peer* = ref object
|
|
network*: Eth2Node
|
|
info*: PeerInfo
|
|
discoveryId*: Eth2DiscoveryId
|
|
connectionState*: ConnectionState
|
|
protocolStates*: seq[RootRef]
|
|
maxInactivityAllowed*: Duration
|
|
netThroughput: AverageThroughput
|
|
score*: int
|
|
connections*: int
|
|
disconnectedFut: Future[void]
|
|
|
|
PeerAddr* = object
|
|
peerId*: PeerID
|
|
addrs*: seq[MultiAddress]
|
|
|
|
ConnectionState* = enum
|
|
None,
|
|
Connecting,
|
|
Connected,
|
|
Disconnecting,
|
|
Disconnected
|
|
|
|
UntypedResponse = ref object
|
|
peer*: Peer
|
|
stream*: Connection
|
|
writtenChunks*: int
|
|
|
|
SingleChunkResponse*[MsgType] = distinct UntypedResponse
|
|
## Protocol requests using this type will produce request-making
|
|
## client-side procs that return `NetRes[MsgType]`
|
|
|
|
MultipleChunksResponse*[MsgType] = distinct UntypedResponse
|
|
## Protocol requests using this type will produce request-making
|
|
## client-side procs that return `NetRes[seq[MsgType]]`.
|
|
## In the future, such procs will return an `InputStream[NetRes[MsgType]]`.
|
|
|
|
MessageInfo* = object
|
|
name*: string
|
|
|
|
# Private fields:
|
|
libp2pCodecName: string
|
|
protocolMounter*: MounterProc
|
|
|
|
ProtocolInfoObj* = object
|
|
name*: string
|
|
messages*: seq[MessageInfo]
|
|
index*: int # the position of the protocol in the
|
|
# ordered list of supported protocols
|
|
|
|
# Private fields:
|
|
peerStateInitializer*: PeerStateInitializer
|
|
networkStateInitializer*: NetworkStateInitializer
|
|
onPeerConnected*: OnPeerConnectedHandler
|
|
onPeerDisconnected*: OnPeerDisconnectedHandler
|
|
|
|
ProtocolInfo* = ptr ProtocolInfoObj
|
|
|
|
ResponseCode* = enum
|
|
Success
|
|
InvalidRequest
|
|
ServerError
|
|
|
|
PeerStateInitializer* = proc(peer: Peer): RootRef {.gcsafe.}
|
|
NetworkStateInitializer* = proc(network: EthereumNode): RootRef {.gcsafe.}
|
|
OnPeerConnectedHandler* = proc(peer: Peer, incoming: bool): Future[void] {.gcsafe.}
|
|
OnPeerDisconnectedHandler* = proc(peer: Peer): Future[void] {.gcsafe.}
|
|
ThunkProc* = LPProtoHandler
|
|
MounterProc* = proc(network: Eth2Node) {.gcsafe.}
|
|
MessageContentPrinter* = proc(msg: pointer): string {.gcsafe.}
|
|
|
|
DisconnectionReason* = enum
|
|
# might see other values on the wire!
|
|
ClientShutDown = 1
|
|
IrrelevantNetwork = 2
|
|
FaultOrError = 3
|
|
|
|
PeerDisconnected* = object of CatchableError
|
|
reason*: DisconnectionReason
|
|
|
|
TransmissionError* = object of CatchableError
|
|
|
|
Eth2NetworkingErrorKind* = enum
|
|
BrokenConnection
|
|
ReceivedErrorResponse
|
|
UnexpectedEOF
|
|
PotentiallyExpectedEOF
|
|
InvalidResponseCode
|
|
InvalidSnappyBytes
|
|
InvalidSszBytes
|
|
StreamOpenTimeout
|
|
ReadResponseTimeout
|
|
ZeroSizePrefix
|
|
SizePrefixOverflow
|
|
|
|
Eth2NetworkingError = object
|
|
case kind*: Eth2NetworkingErrorKind
|
|
of ReceivedErrorResponse:
|
|
responseCode: ResponseCode
|
|
errorMsg: ErrorMsg
|
|
else:
|
|
discard
|
|
|
|
NetRes*[T] = Result[T, Eth2NetworkingError]
|
|
## This is type returned from all network requests
|
|
|
|
const
|
|
clientId* = "Nimbus beacon node v" & fullVersionStr
|
|
networkKeyFilename = "privkey.protobuf"
|
|
nodeMetadataFilename = "node-metadata.json"
|
|
|
|
TCP = net.Protocol.IPPROTO_TCP
|
|
HandshakeTimeout = FaultOrError
|
|
|
|
# Spec constants
|
|
# https://github.com/ethereum/eth2.0-specs/blob/v0.12.2/specs/phase0/p2p-interface.md#eth2-network-interaction-domains
|
|
MAX_CHUNK_SIZE* = 1 * 1024 * 1024 # bytes
|
|
GOSSIP_MAX_SIZE* = 1 * 1024 * 1024 # bytes
|
|
TTFB_TIMEOUT* = 5.seconds
|
|
RESP_TIMEOUT* = 10.seconds
|
|
|
|
NewPeerScore* = 200
|
|
## Score which will be assigned to new connected Peer
|
|
PeerScoreLowLimit* = 0
|
|
## Score after which peer will be kicked
|
|
PeerScoreHighLimit* = 1000
|
|
## Max value of peer's score
|
|
|
|
ConcurrentConnections* = 4
|
|
## Maximum number of active concurrent connection requests.
|
|
|
|
SeenTableTimeTimeout* =
|
|
when not defined(local_testnet): 5.minutes else: 10.seconds
|
|
|
|
## Seen period of time for timeout connections
|
|
SeenTableTimeDeadPeer* =
|
|
when not defined(local_testnet): 5.minutes else: 10.seconds
|
|
|
|
## Period of time for dead peers.
|
|
SeenTableTimeIrrelevantNetwork* = 24.hours
|
|
## Period of time for `IrrelevantNetwork` error reason.
|
|
SeenTableTimeClientShutDown* = 10.minutes
|
|
## Period of time for `ClientShutDown` error reason.
|
|
SeemTableTimeFaultOrError* = 10.minutes
|
|
## Period of time for `FaultOnError` error reason.
|
|
|
|
var successfullyDialledAPeer = false # used to show a warning
|
|
|
|
template neterr(kindParam: Eth2NetworkingErrorKind): auto =
|
|
err(type(result), Eth2NetworkingError(kind: kindParam))
|
|
|
|
# Metrics for tracking attestation and beacon block loss
|
|
declareCounter nbc_gossip_messages_sent,
|
|
"Number of gossip messages sent by this peer"
|
|
|
|
declareCounter nbc_gossip_messages_received,
|
|
"Number of gossip messages received by this peer"
|
|
|
|
declarePublicCounter nbc_successful_dials,
|
|
"Number of successfully dialed peers"
|
|
|
|
declarePublicCounter nbc_failed_dials,
|
|
"Number of dialing attempts that failed"
|
|
|
|
declarePublicCounter nbc_timeout_dials,
|
|
"Number of dialing attempts that exceeded timeout"
|
|
|
|
declarePublicGauge nbc_peers,
|
|
"Number of active libp2p peers"
|
|
|
|
proc safeClose(conn: Connection) {.async.} =
|
|
if not conn.closed:
|
|
await close(conn)
|
|
|
|
const
|
|
snappy_implementation {.strdefine.} = "libp2p"
|
|
|
|
const useNativeSnappy = when snappy_implementation == "native": true
|
|
elif snappy_implementation == "libp2p": false
|
|
else: {.fatal: "Please set snappy_implementation to either 'libp2p' or 'native'".}
|
|
|
|
const
|
|
libp2p_pki_schemes {.strdefine.} = ""
|
|
|
|
when libp2p_pki_schemes != "secp256k1":
|
|
{.fatal: "Incorrect building process, please use -d:\"libp2p_pki_schemes=secp256k1\"".}
|
|
|
|
template libp2pProtocol*(name: string, version: int) {.pragma.}
|
|
|
|
template `$`*(peer: Peer): string = id(peer.info)
|
|
chronicles.formatIt(Peer): $it
|
|
|
|
template remote*(peer: Peer): untyped =
|
|
peer.info.peerId
|
|
|
|
proc openStream(node: Eth2Node,
|
|
peer: Peer,
|
|
protocolId: string): Future[Connection] {.async.} =
|
|
let
|
|
protocolId = protocolId & "ssz_snappy"
|
|
conn = await dial(
|
|
node.switch, peer.info.peerId, peer.info.addrs, protocolId)
|
|
|
|
# libp2p may replace peerinfo ref sometimes, so make sure we have a recent
|
|
# one
|
|
if conn.peerInfo != nil:
|
|
peer.info = conn.peerInfo
|
|
|
|
return conn
|
|
|
|
proc init*(T: type Peer, network: Eth2Node, info: PeerInfo): Peer {.gcsafe.}
|
|
|
|
proc getPeer*(node: Eth2Node, peerId: PeerID): Peer {.gcsafe.} =
|
|
node.peers.withValue(peerId, peer) do:
|
|
return peer[]
|
|
do:
|
|
let peer = Peer.init(node, PeerInfo.init(peerId))
|
|
return node.peers.mGetOrPut(peerId, peer)
|
|
|
|
proc peerFromStream(network: Eth2Node, conn: Connection): Peer =
|
|
# TODO: Can this be `nil`?
|
|
return network.getPeer(conn.peerInfo.peerId)
|
|
|
|
proc getKey*(peer: Peer): PeerID {.inline.} =
|
|
result = peer.info.peerId
|
|
|
|
proc getFuture*(peer: Peer): Future[void] {.inline.} =
|
|
if peer.disconnectedFut.isNil:
|
|
peer.disconnectedFut = newFuture[void]()
|
|
result = peer.disconnectedFut
|
|
|
|
proc getScore*(a: Peer): int =
|
|
## Returns current score value for peer ``peer``.
|
|
result = a.score
|
|
|
|
proc updateScore*(peer: Peer, score: int) {.inline.} =
|
|
## Update peer's ``peer`` score with value ``score``.
|
|
peer.score = peer.score + score
|
|
if peer.score > PeerScoreHighLimit:
|
|
peer.score = PeerScoreHighLimit
|
|
|
|
proc calcThroughput(dur: Duration, value: uint64): float {.inline.} =
|
|
let secs = float(chronos.seconds(1).nanoseconds)
|
|
if isZero(dur):
|
|
0.0
|
|
else:
|
|
float(value) * (secs / float(dur.nanoseconds))
|
|
|
|
proc updateNetThroughput*(peer: Peer, dur: Duration,
|
|
bytesCount: uint64) {.inline.} =
|
|
## Update peer's ``peer`` network throughput.
|
|
let bytesPerSecond = calcThroughput(dur, bytesCount)
|
|
let a = peer.netThroughput.average
|
|
let n = peer.netThroughput.count
|
|
peer.netThroughput.average = a + (bytesPerSecond - a) / float(n + 1)
|
|
inc(peer.netThroughput.count)
|
|
|
|
proc netBps*(peer: Peer): float {.inline.} =
|
|
## Returns current network throughput average value in Bps for peer ``peer``.
|
|
round((peer.netThroughput.average * 10_000) / 10_000)
|
|
|
|
proc netKbps*(peer: Peer): float {.inline.} =
|
|
## Returns current network throughput average value in Kbps for peer ``peer``.
|
|
round(((peer.netThroughput.average / 1024) * 10_000) / 10_000)
|
|
|
|
proc netMbps*(peer: Peer): float {.inline.} =
|
|
## Returns current network throughput average value in Mbps for peer ``peer``.
|
|
round(((peer.netThroughput.average / (1024 * 1024)) * 10_000) / 10_000)
|
|
|
|
proc `<`*(a, b: Peer): bool =
|
|
## Comparison function, which first checks peer's scores, and if the peers'
|
|
## score is equal it compares peers' network throughput.
|
|
if a.score < b.score:
|
|
true
|
|
elif a.score == b.score:
|
|
(a.netThroughput.average < b.netThroughput.average)
|
|
else:
|
|
false
|
|
|
|
proc isSeen*(network: ETh2Node, peerId: PeerID): bool =
|
|
let currentTime = now(chronos.Moment)
|
|
if peerId notin network.seenTable:
|
|
return false
|
|
let item = network.seenTable[peerId]
|
|
if currentTime >= item.stamp:
|
|
# Peer is in SeenTable, but the time period has expired.
|
|
network.seenTable.del(peerId)
|
|
return false
|
|
return true
|
|
|
|
proc addSeen*(network: ETh2Node, peerId: PeerID,
|
|
period: chronos.Duration) =
|
|
let item = SeenItem(peerId: peerId, stamp: now(chronos.Moment) + period)
|
|
network.seenTable[peerId] = item
|
|
|
|
proc disconnect*(peer: Peer, reason: DisconnectionReason,
|
|
notifyOtherPeer = false) {.async.} =
|
|
# TODO: How should we notify the other peer?
|
|
if peer.connectionState notin {Disconnecting, Disconnected}:
|
|
peer.connectionState = Disconnecting
|
|
await peer.network.switch.disconnect(peer.info.peerId)
|
|
peer.connectionState = Disconnected
|
|
peer.network.peerPool.release(peer)
|
|
let seenTime = case reason
|
|
of ClientShutDown:
|
|
SeenTableTimeClientShutDown
|
|
of IrrelevantNetwork:
|
|
SeenTableTimeIrrelevantNetwork
|
|
of FaultOrError:
|
|
SeemTableTimeFaultOrError
|
|
peer.network.addSeen(peer.info.peerId, seenTime)
|
|
|
|
include eth/p2p/p2p_backends_helpers
|
|
include eth/p2p/p2p_tracing
|
|
|
|
proc getRequestProtoName(fn: NimNode): NimNode =
|
|
# `getCustomPragmaVal` doesn't work yet on regular nnkProcDef nodes
|
|
# (TODO: file as an issue)
|
|
|
|
let pragmas = fn.pragma
|
|
if pragmas.kind == nnkPragma and pragmas.len > 0:
|
|
for pragma in pragmas:
|
|
if pragma.len > 0 and $pragma[0] == "libp2pProtocol":
|
|
let protoName = $(pragma[1])
|
|
let protoVer = $(pragma[2].intVal)
|
|
return newLit("/eth2/beacon_chain/req/" & protoName & "/" & protoVer & "/")
|
|
|
|
return newLit("")
|
|
|
|
template raisePeerDisconnected(msg: string, r: DisconnectionReason) =
|
|
var e = newException(PeerDisconnected, msg)
|
|
e.reason = r
|
|
raise e
|
|
|
|
proc disconnectAndRaise(peer: Peer,
|
|
reason: DisconnectionReason,
|
|
msg: string) {.async.} =
|
|
let r = reason
|
|
await peer.disconnect(r)
|
|
raisePeerDisconnected(msg, r)
|
|
|
|
proc writeChunk*(conn: Connection,
|
|
responseCode: Option[ResponseCode],
|
|
payload: Bytes) {.async.} =
|
|
var output = memoryOutput()
|
|
|
|
if responseCode.isSome:
|
|
output.write byte(responseCode.get)
|
|
|
|
output.write varintBytes(payload.lenu64)
|
|
output.write(framingFormatCompress payload)
|
|
|
|
await conn.write(output.getOutput)
|
|
|
|
template errorMsgLit(x: static string): ErrorMsg =
|
|
const val = ErrorMsg toBytes(x)
|
|
val
|
|
|
|
proc formatErrorMsg(msg: ErrorMSg): string =
|
|
let candidate = string.fromBytes(asSeq(msg))
|
|
for c in candidate:
|
|
# TODO UTF-8 - but let's start with ASCII
|
|
if ord(c) < 32 or ord(c) > 127:
|
|
return byteutils.toHex(asSeq(msg))
|
|
|
|
return candidate
|
|
|
|
proc sendErrorResponse(peer: Peer,
|
|
conn: Connection,
|
|
responseCode: ResponseCode,
|
|
errMsg: ErrorMsg) {.async.} =
|
|
debug "Error processing request",
|
|
peer, responseCode, errMsg = formatErrorMsg(errMsg)
|
|
await conn.writeChunk(some responseCode, SSZ.encode(errMsg))
|
|
|
|
proc sendNotificationMsg(peer: Peer, protocolId: string, requestBytes: Bytes) {.async} =
|
|
var
|
|
deadline = sleepAsync RESP_TIMEOUT
|
|
streamFut = peer.network.openStream(peer, protocolId)
|
|
|
|
await streamFut or deadline
|
|
|
|
if not streamFut.finished:
|
|
streamFut.cancel()
|
|
raise newException(TransmissionError, "Failed to open LibP2P stream")
|
|
|
|
let stream = streamFut.read
|
|
try:
|
|
await stream.writeChunk(none ResponseCode, requestBytes)
|
|
finally:
|
|
await safeClose(stream)
|
|
|
|
proc sendResponseChunkBytes(response: UntypedResponse, payload: Bytes) {.async.} =
|
|
inc response.writtenChunks
|
|
await response.stream.writeChunk(some Success, payload)
|
|
|
|
proc sendResponseChunkObj(response: UntypedResponse, val: auto) {.async.} =
|
|
inc response.writtenChunks
|
|
await response.stream.writeChunk(some Success, SSZ.encode(val))
|
|
|
|
template sendUserHandlerResultAsChunkImpl*(stream: Connection,
|
|
handlerResultFut: Future): untyped =
|
|
let handlerRes = await handlerResultFut
|
|
writeChunk(stream, some Success, SSZ.encode(handlerRes))
|
|
|
|
template sendUserHandlerResultAsChunkImpl*(stream: Connection,
|
|
handlerResult: auto): untyped =
|
|
writeChunk(stream, some Success, SSZ.encode(handlerResult))
|
|
|
|
when useNativeSnappy:
|
|
include faststreams_backend
|
|
else:
|
|
include libp2p_streams_backend
|
|
|
|
proc makeEth2Request(peer: Peer, protocolId: string, requestBytes: Bytes,
|
|
ResponseMsg: type,
|
|
timeout: Duration): Future[NetRes[ResponseMsg]]
|
|
{.gcsafe, async.} =
|
|
var deadline = sleepAsync timeout
|
|
|
|
let stream = awaitWithTimeout(peer.network.openStream(peer, protocolId),
|
|
deadline): return neterr StreamOpenTimeout
|
|
try:
|
|
# Send the request
|
|
await stream.writeChunk(none ResponseCode, requestBytes)
|
|
|
|
# Read the response
|
|
return awaitWithTimeout(
|
|
readResponse(when useNativeSnappy: libp2pInput(stream) else: stream,
|
|
peer, ResponseMsg),
|
|
deadline, neterr(ReadResponseTimeout))
|
|
finally:
|
|
await safeClose(stream)
|
|
|
|
proc init*[MsgType](T: type MultipleChunksResponse[MsgType],
|
|
peer: Peer, conn: Connection): T =
|
|
T(UntypedResponse(peer: peer, stream: conn))
|
|
|
|
proc init*[MsgType](T: type SingleChunkResponse[MsgType],
|
|
peer: Peer, conn: Connection): T =
|
|
T(UntypedResponse(peer: peer, stream: conn))
|
|
|
|
template write*[M](r: MultipleChunksResponse[M], val: auto): untyped =
|
|
sendResponseChunkObj(UntypedResponse(r), val)
|
|
|
|
template send*[M](r: SingleChunkResponse[M], val: auto): untyped =
|
|
doAssert UntypedResponse(r).writtenChunks == 0
|
|
sendResponseChunkObj(UntypedResponse(r), val)
|
|
|
|
proc performProtocolHandshakes*(peer: Peer, incoming: bool) {.async.} =
|
|
# Loop down serially because it's easier to reason about the connection state
|
|
# when there are fewer async races, specially during setup
|
|
for protocol in allProtocols:
|
|
if protocol.onPeerConnected != nil:
|
|
await protocol.onPeerConnected(peer, incoming)
|
|
|
|
proc initProtocol(name: string,
|
|
peerInit: PeerStateInitializer,
|
|
networkInit: NetworkStateInitializer): ProtocolInfoObj =
|
|
result.name = name
|
|
result.messages = @[]
|
|
result.peerStateInitializer = peerInit
|
|
result.networkStateInitializer = networkInit
|
|
|
|
proc registerProtocol(protocol: ProtocolInfo) =
|
|
# TODO: This can be done at compile-time in the future
|
|
let pos = lowerBound(gProtocols, protocol)
|
|
gProtocols.insert(protocol, pos)
|
|
for i in 0 ..< gProtocols.len:
|
|
gProtocols[i].index = i
|
|
|
|
proc setEventHandlers(p: ProtocolInfo,
|
|
onPeerConnected: OnPeerConnectedHandler,
|
|
onPeerDisconnected: OnPeerDisconnectedHandler) =
|
|
p.onPeerConnected = onPeerConnected
|
|
p.onPeerDisconnected = onPeerDisconnected
|
|
|
|
proc implementSendProcBody(sendProc: SendProc) =
|
|
let
|
|
msg = sendProc.msg
|
|
UntypedResponse = bindSym "UntypedResponse"
|
|
|
|
proc sendCallGenerator(peer, bytes: NimNode): NimNode =
|
|
if msg.kind != msgResponse:
|
|
let msgProto = getRequestProtoName(msg.procDef)
|
|
case msg.kind
|
|
of msgRequest:
|
|
let ResponseRecord = msg.response.recName
|
|
quote:
|
|
makeEth2Request(`peer`, `msgProto`, `bytes`,
|
|
`ResponseRecord`, `timeoutVar`)
|
|
else:
|
|
quote: sendNotificationMsg(`peer`, `msgProto`, `bytes`)
|
|
else:
|
|
quote: sendResponseChunkBytes(`UntypedResponse`(`peer`), `bytes`)
|
|
|
|
sendProc.useStandardBody(nil, nil, sendCallGenerator)
|
|
|
|
proc handleIncomingStream(network: Eth2Node,
|
|
conn: Connection,
|
|
MsgType: type) {.async, gcsafe.} =
|
|
mixin callUserHandler, RecType
|
|
|
|
type MsgRec = RecType(MsgType)
|
|
const msgName {.used.} = typetraits.name(MsgType)
|
|
|
|
## Uncomment this to enable tracing on all incoming requests
|
|
## You can include `msgNameLit` in the condition to select
|
|
## more specific requests:
|
|
# when chronicles.runtimeFilteringEnabled:
|
|
# setLogLevel(LogLevel.TRACE)
|
|
# defer: setLogLevel(LogLevel.DEBUG)
|
|
# trace "incoming " & `msgNameLit` & " conn"
|
|
|
|
try:
|
|
let peer = peerFromStream(network, conn)
|
|
|
|
# TODO peer connection setup is broken, update info in some better place
|
|
# whenever race is fix:
|
|
# https://github.com/status-im/nim-beacon-chain/issues/1157
|
|
peer.info = conn.peerInfo
|
|
|
|
template returnInvalidRequest(msg: ErrorMsg) =
|
|
await sendErrorResponse(peer, conn, InvalidRequest, msg)
|
|
return
|
|
|
|
template returnInvalidRequest(msg: string) =
|
|
returnInvalidRequest(ErrorMsg msg.toBytes)
|
|
|
|
let s = when useNativeSnappy:
|
|
let fs = libp2pInput(conn)
|
|
|
|
if fs.timeoutToNextByte(TTFB_TIMEOUT):
|
|
returnInvalidRequest(errorMsgLit "Request first byte not sent in time")
|
|
|
|
fs
|
|
else:
|
|
# TODO The TTFB timeout is not implemented in LibP2P streams back-end
|
|
conn
|
|
|
|
let deadline = sleepAsync RESP_TIMEOUT
|
|
|
|
let msg = if sizeof(MsgRec) > 0:
|
|
try:
|
|
awaitWithTimeout(readChunkPayload(s, peer, MsgRec), deadline):
|
|
returnInvalidRequest(errorMsgLit "Request full data not sent in time")
|
|
|
|
except SerializationError as err:
|
|
returnInvalidRequest err.formatMsg("msg")
|
|
|
|
except SnappyError as err:
|
|
returnInvalidRequest err.msg
|
|
else:
|
|
NetRes[MsgRec].ok default(MsgRec)
|
|
|
|
if msg.isErr:
|
|
let (responseCode, errMsg) = case msg.error.kind
|
|
of UnexpectedEOF, PotentiallyExpectedEOF:
|
|
(InvalidRequest, errorMsgLit "Incomplete request")
|
|
|
|
of InvalidSnappyBytes:
|
|
(InvalidRequest, errorMsgLit "Failed to decompress snappy payload")
|
|
|
|
of InvalidSszBytes:
|
|
(InvalidRequest, errorMsgLit "Failed to decode SSZ payload")
|
|
|
|
of ZeroSizePrefix:
|
|
(InvalidRequest, errorMsgLit "The request chunk cannot have a size of zero")
|
|
|
|
of SizePrefixOverflow:
|
|
(InvalidRequest, errorMsgLit "The chunk size exceed the maximum allowed")
|
|
|
|
of InvalidResponseCode, ReceivedErrorResponse,
|
|
StreamOpenTimeout, ReadResponseTimeout:
|
|
# These shouldn't be possible in a request, because
|
|
# there are no response codes being read, no stream
|
|
# openings and no reading of responses:
|
|
(ServerError, errorMsgLit "Internal server error")
|
|
|
|
of BrokenConnection:
|
|
return
|
|
|
|
await sendErrorResponse(peer, conn, responseCode, errMsg)
|
|
return
|
|
|
|
try:
|
|
logReceivedMsg(peer, MsgType(msg.get))
|
|
await callUserHandler(MsgType, peer, conn, msg.get)
|
|
except CatchableError as err:
|
|
await sendErrorResponse(peer, conn, ServerError,
|
|
ErrorMsg err.msg.toBytes)
|
|
|
|
except CatchableError as err:
|
|
debug "Error processing an incoming request", err = err.msg, msgName
|
|
|
|
finally:
|
|
await safeClose(conn)
|
|
|
|
proc handleOutgoingPeer(peer: Peer): Future[bool] {.async.} =
|
|
let network = peer.network
|
|
|
|
proc onPeerClosed(udata: pointer) {.gcsafe.} =
|
|
debug "Peer (outgoing) lost", peer
|
|
nbc_peers.set int64(len(network.peerPool))
|
|
|
|
let res = await network.peerPool.addOutgoingPeer(peer)
|
|
if res:
|
|
peer.updateScore(NewPeerScore)
|
|
debug "Peer (outgoing) has been added to PeerPool", peer
|
|
peer.getFuture().addCallback(onPeerClosed)
|
|
result = true
|
|
|
|
nbc_peers.set int64(len(network.peerPool))
|
|
|
|
proc handleIncomingPeer(peer: Peer): Future[bool] {.async.} =
|
|
let network = peer.network
|
|
|
|
proc onPeerClosed(udata: pointer) {.gcsafe.} =
|
|
debug "Peer (incoming) lost", peer
|
|
nbc_peers.set int64(len(network.peerPool))
|
|
|
|
let res = await network.peerPool.addIncomingPeer(peer)
|
|
if res:
|
|
peer.updateScore(NewPeerScore)
|
|
debug "Peer (incoming) has been added to PeerPool", peer
|
|
peer.getFuture().addCallback(onPeerClosed)
|
|
result = true
|
|
|
|
nbc_peers.set int64(len(network.peerPool))
|
|
|
|
proc toPeerAddr*(r: enr.TypedRecord):
|
|
Result[PeerAddr, cstring] {.raises: [Defect].} =
|
|
if not r.secp256k1.isSome:
|
|
return err("enr: no secp256k1 key in record")
|
|
|
|
let
|
|
pubKey = ? keys.PublicKey.fromRaw(r.secp256k1.get)
|
|
peerId = ? PeerID.init(crypto.PublicKey(
|
|
scheme: Secp256k1, skkey: secp.SkPublicKey(pubKey)))
|
|
|
|
var addrs = newSeq[MultiAddress]()
|
|
|
|
if r.ip.isSome and r.tcp.isSome:
|
|
let ip = ipv4(r.ip.get)
|
|
addrs.add MultiAddress.init(ip, tcpProtocol, Port r.tcp.get)
|
|
|
|
if r.ip6.isSome:
|
|
let ip = ipv6(r.ip6.get)
|
|
if r.tcp6.isSome:
|
|
addrs.add MultiAddress.init(ip, tcpProtocol, Port r.tcp6.get)
|
|
elif r.tcp.isSome:
|
|
addrs.add MultiAddress.init(ip, tcpProtocol, Port r.tcp.get)
|
|
else:
|
|
discard
|
|
|
|
if addrs.len == 0:
|
|
return err("enr: no addresses in record")
|
|
|
|
ok(PeerAddr(peerId: peerId, addrs: addrs))
|
|
|
|
proc dialPeer*(node: Eth2Node, peerAddr: PeerAddr) {.async.} =
|
|
logScope: peer = peerAddr.peerId
|
|
|
|
debug "Connecting to discovered peer"
|
|
|
|
# TODO connect is called here, but there's no guarantee that the connection
|
|
# we get when using dialPeer later on is the one we just connected
|
|
let peer = node.getPeer(peerAddr.peerId)
|
|
|
|
await node.switch.connect(peerAddr.peerId, peerAddr.addrs)
|
|
|
|
#let msDial = newMultistream()
|
|
#let conn = node.switch.connections.getOrDefault(peerInfo.id)
|
|
#let ls = await msDial.list(conn)
|
|
#debug "Supported protocols", ls
|
|
|
|
inc nbc_successful_dials
|
|
successfullyDialledAPeer = true
|
|
debug "Network handshakes completed"
|
|
|
|
proc connectWorker(network: Eth2Node) {.async.} =
|
|
debug "Connection worker started"
|
|
|
|
while true:
|
|
let
|
|
remotePeerAddr = await network.connQueue.popFirst()
|
|
peerPoolHasRemotePeer = network.peerPool.hasPeer(remotePeerAddr.peerId)
|
|
seenTableHasRemotePeer = network.isSeen(remotePeerAddr.peerId)
|
|
remotePeerAlreadyConnected = remotePeerAddr.peerId in network.connTable
|
|
|
|
if not(peerPoolHasRemotePeer) and not(seenTableHasRemotePeer) and not(remotePeerAlreadyConnected):
|
|
network.connTable.incl(remotePeerAddr.peerId)
|
|
try:
|
|
# We trying to connect to peers which are not in PeerPool, SeenTable and
|
|
# ConnTable.
|
|
var fut = network.dialPeer(remotePeerAddr)
|
|
# We discarding here just because we going to check future state, to avoid
|
|
# condition where connection happens and timeout reached.
|
|
discard await withTimeout(fut, network.connectTimeout)
|
|
# We handling only timeout and errors, because successfull connections
|
|
# will be stored in PeerPool.
|
|
if fut.finished():
|
|
if fut.failed() and not(fut.cancelled()):
|
|
debug "Unable to establish connection with peer", peer = remotePeerAddr.peerId,
|
|
errMsg = fut.readError().msg
|
|
inc nbc_failed_dials
|
|
network.addSeen(remotePeerAddr.peerId, SeenTableTimeDeadPeer)
|
|
continue
|
|
debug "Connection to remote peer timed out", peer = remotePeerAddr.peerId
|
|
inc nbc_timeout_dials
|
|
network.addSeen(remotePeerAddr.peerId, SeenTableTimeTimeout)
|
|
finally:
|
|
network.connTable.excl(remotePeerAddr.peerId)
|
|
else:
|
|
trace "Peer is already connected, connecting or already seen",
|
|
peer = remotePeerAddr.peerId, peer_pool_has_peer = $peerPoolHasRemotePeer, seen_table_has_peer = $seenTableHasRemotePeer,
|
|
connecting_peer = $remotePeerAlreadyConnected, seen_table_size = len(network.seenTable)
|
|
|
|
# Prevent (a purely theoretical) high CPU usage when losing connectivity.
|
|
await sleepAsync(1.seconds)
|
|
|
|
proc runDiscoveryLoop*(node: Eth2Node) {.async.} =
|
|
debug "Starting discovery loop"
|
|
|
|
let enrField = ("eth2", SSZ.encode(node.forkId))
|
|
while true:
|
|
let currentPeerCount = node.peerPool.len
|
|
if currentPeerCount < node.wantedPeers:
|
|
try:
|
|
let discoveredPeers =
|
|
node.discovery.randomNodes(node.wantedPeers - currentPeerCount,
|
|
enrField)
|
|
for peer in discoveredPeers:
|
|
try:
|
|
let peerRecord = peer.record.toTypedRecord
|
|
if peerRecord.isOk:
|
|
let peerAddr = peerRecord.value.toPeerAddr
|
|
if peerAddr.isOk:
|
|
if not node.switch.isConnected(peerAddr.get().peerId):
|
|
await node.connQueue.addLast(peerAddr.get())
|
|
else:
|
|
discard # peerInfo.close()
|
|
except CatchableError as err:
|
|
debug "Failed to connect to peer", peer = $peer, err = err.msg
|
|
except CatchableError as err:
|
|
debug "Failure in discovery", err = err.msg
|
|
|
|
await sleepAsync seconds(1)
|
|
|
|
proc getPersistentNetMetadata*(conf: BeaconNodeConf): Eth2Metadata =
|
|
let metadataPath = conf.dataDir / nodeMetadataFilename
|
|
if not fileExists(metadataPath):
|
|
result = Eth2Metadata()
|
|
for i in 0 ..< ATTESTATION_SUBNET_COUNT:
|
|
# TODO: For now, we indicate that we participate in all subnets
|
|
result.attnets[i] = true
|
|
Json.saveFile(metadataPath, result)
|
|
else:
|
|
result = Json.loadFile(metadataPath, Eth2Metadata)
|
|
|
|
proc onConnEvent(node: Eth2Node, peerId: PeerID, event: ConnEvent) {.async.} =
|
|
let peer = node.getPeer(peerId)
|
|
case event.kind
|
|
of ConnEventKind.Connected:
|
|
inc peer.connections
|
|
debug "Peer upgraded", peer = peerId, connections = peer.connections
|
|
|
|
if peer.connections == 1:
|
|
# Libp2p may connect multiple times to the same peer - using different
|
|
# transports or both incoming and outgoing. For now, we'll count our
|
|
# "fist" encounter with the peer as the true connection, leaving the
|
|
# other connections be - libp2p limits the number of concurrent
|
|
# connections to the same peer, and only one of these connections will be
|
|
# active. Nonetheless, this quirk will cause a number of odd behaviours:
|
|
# * For peer limits, we might miscount the incoming vs outgoing quota
|
|
# * Protocol handshakes are wonky: we'll not necessarily use the newly
|
|
# connected transport - instead we'll just pick a random one!
|
|
await performProtocolHandshakes(peer, event.incoming)
|
|
|
|
# While performing the handshake, the peer might have been disconnected -
|
|
# there's still a slim chance of a race condition here if a reconnect
|
|
# happens quickly
|
|
if peer.connections == 1:
|
|
|
|
# TODO when the pool is full, adding it will block - this means peers
|
|
# will be left in limbo until some other peer makes room for it
|
|
let added = if event.incoming:
|
|
await handleIncomingPeer(peer)
|
|
else:
|
|
await handleOutgoingPeer(peer)
|
|
|
|
if not added:
|
|
# We must have hit a limit!
|
|
await peer.disconnect(FaultOrError)
|
|
|
|
of ConnEventKind.Disconnected:
|
|
dec peer.connections
|
|
debug "Peer disconnected", peer = peerId, connections = peer.connections
|
|
if peer.connections == 0:
|
|
let fut = peer.disconnectedFut
|
|
if fut != nil:
|
|
peer.disconnectedFut = nil
|
|
fut.complete()
|
|
|
|
proc init*(T: type Eth2Node, conf: BeaconNodeConf, enrForkId: ENRForkID,
|
|
switch: Switch, ip: Option[ValidIpAddress], tcpPort, udpPort: Port,
|
|
privKey: keys.PrivateKey, rng: ref BrHmacDrbgContext): T =
|
|
new result
|
|
result.switch = switch
|
|
result.wantedPeers = conf.maxPeers
|
|
result.peerPool = newPeerPool[Peer, PeerID](maxPeers = conf.maxPeers)
|
|
when not defined(local_testnet):
|
|
result.connectTimeout = 1.minutes
|
|
result.seenThreshold = 5.minutes
|
|
else:
|
|
result.connectTimeout = 10.seconds
|
|
result.seenThreshold = 10.seconds
|
|
result.seenTable = initTable[PeerID, SeenItem]()
|
|
result.connTable = initHashSet[PeerID]()
|
|
result.connQueue = newAsyncQueue[PeerAddr](ConcurrentConnections)
|
|
result.metadata = getPersistentNetMetadata(conf)
|
|
result.forkId = enrForkId
|
|
result.discovery = Eth2DiscoveryProtocol.new(
|
|
conf, ip, tcpPort, udpPort, privKey,
|
|
{"eth2": SSZ.encode(result.forkId), "attnets": SSZ.encode(result.metadata.attnets)},
|
|
rng)
|
|
|
|
newSeq result.protocolStates, allProtocols.len
|
|
for proto in allProtocols:
|
|
if proto.networkStateInitializer != nil:
|
|
result.protocolStates[proto.index] = proto.networkStateInitializer(result)
|
|
|
|
for msg in proto.messages:
|
|
if msg.protocolMounter != nil:
|
|
msg.protocolMounter result
|
|
|
|
let node = result
|
|
proc peerHook(peerId: PeerID, event: ConnEvent): Future[void] {.gcsafe.} =
|
|
onConnEvent(node, peerId, event)
|
|
|
|
switch.addConnEventHandler(peerHook, ConnEventKind.Connected)
|
|
switch.addConnEventHandler(peerHook, ConnEventKind.Disconnected)
|
|
|
|
template publicKey*(node: Eth2Node): keys.PublicKey =
|
|
node.discovery.privKey.toPublicKey
|
|
|
|
proc startListening*(node: Eth2Node) {.async.} =
|
|
node.discovery.open()
|
|
node.libp2pTransportLoops = await node.switch.start()
|
|
|
|
proc start*(node: Eth2Node) {.async.} =
|
|
for i in 0 ..< ConcurrentConnections:
|
|
node.connWorkers.add connectWorker(node)
|
|
|
|
node.discovery.start()
|
|
node.discoveryLoop = node.runDiscoveryLoop()
|
|
traceAsyncErrors node.discoveryLoop
|
|
|
|
proc stop*(node: Eth2Node) {.async.} =
|
|
# Ignore errors in futures, since we're shutting down (but log them on the
|
|
# TRACE level, if a timeout is reached).
|
|
let
|
|
waitedFutures = @[
|
|
node.discovery.closeWait(),
|
|
node.switch.stop(),
|
|
]
|
|
timeout = 5.seconds
|
|
completed = await withTimeout(allFutures(waitedFutures), timeout)
|
|
if not completed:
|
|
trace "Eth2Node.stop(): timeout reached", timeout, futureErrors = waitedFutures.filterIt(it.error != nil).mapIt(it.error.msg)
|
|
|
|
proc init*(T: type Peer, network: Eth2Node, info: PeerInfo): Peer =
|
|
new result
|
|
result.info = info
|
|
result.network = network
|
|
result.connectionState = Connected
|
|
result.maxInactivityAllowed = 15.minutes # TODO: Read this from the config
|
|
newSeq result.protocolStates, allProtocols.len
|
|
for i in 0 ..< allProtocols.len:
|
|
let proto = allProtocols[i]
|
|
if proto.peerStateInitializer != nil:
|
|
result.protocolStates[i] = proto.peerStateInitializer(result)
|
|
|
|
proc registerMsg(protocol: ProtocolInfo,
|
|
name: string,
|
|
mounter: MounterProc,
|
|
libp2pCodecName: string) =
|
|
protocol.messages.add MessageInfo(name: name,
|
|
protocolMounter: mounter,
|
|
libp2pCodecName: libp2pCodecName)
|
|
|
|
proc p2pProtocolBackendImpl*(p: P2PProtocol): Backend =
|
|
var
|
|
Format = ident "SSZ"
|
|
Bool = bindSym "bool"
|
|
Connection = bindSym "Connection"
|
|
Peer = bindSym "Peer"
|
|
Eth2Node = bindSym "Eth2Node"
|
|
registerMsg = bindSym "registerMsg"
|
|
initProtocol = bindSym "initProtocol"
|
|
msgVar = ident "msg"
|
|
networkVar = ident "network"
|
|
callUserHandler = ident "callUserHandler"
|
|
MSG = ident "MSG"
|
|
|
|
p.useRequestIds = false
|
|
p.useSingleRecordInlining = true
|
|
|
|
new result
|
|
|
|
result.PeerType = Peer
|
|
result.NetworkType = Eth2Node
|
|
result.registerProtocol = bindSym "registerProtocol"
|
|
result.setEventHandlers = bindSym "setEventHandlers"
|
|
result.SerializationFormat = Format
|
|
result.RequestResultsWrapper = ident "NetRes"
|
|
|
|
result.implementMsg = proc (msg: p2p_protocol_dsl.Message) =
|
|
if msg.kind == msgResponse:
|
|
return
|
|
|
|
let
|
|
protocol = msg.protocol
|
|
msgName = $msg.ident
|
|
msgNameLit = newLit msgName
|
|
MsgRecName = msg.recName
|
|
MsgStrongRecName = msg.strongRecName
|
|
codecNameLit = getRequestProtoName(msg.procDef)
|
|
protocolMounterName = ident(msgName & "Mounter")
|
|
|
|
##
|
|
## Implement the Thunk:
|
|
##
|
|
## The protocol handlers in nim-libp2p receive only a `Connection`
|
|
## parameter and there is no way to access the wider context (such
|
|
## as the current `Switch`). In our handlers, we may need to list all
|
|
## peers in the current network, so we must keep a reference to the
|
|
## network object in the closure environment of the installed handlers.
|
|
##
|
|
## For this reason, we define a `protocol mounter` proc that will
|
|
## initialize the network object by creating handlers bound to the
|
|
## specific network.
|
|
##
|
|
var userHandlerCall = newTree(nnkDiscardStmt)
|
|
|
|
if msg.userHandler != nil:
|
|
var OutputParamType = if msg.kind == msgRequest: msg.outputParamType
|
|
else: nil
|
|
|
|
if OutputParamType == nil:
|
|
userHandlerCall = msg.genUserHandlerCall(msgVar, [peerVar])
|
|
if msg.kind == msgRequest:
|
|
userHandlerCall = newCall(ident"sendUserHandlerResultAsChunkImpl",
|
|
streamVar,
|
|
userHandlerCall)
|
|
else:
|
|
if OutputParamType.kind == nnkVarTy:
|
|
OutputParamType = OutputParamType[0]
|
|
|
|
let isChunkStream = eqIdent(OutputParamType[0], "MultipleChunksResponse")
|
|
msg.response.recName = if isChunkStream:
|
|
newTree(nnkBracketExpr, ident"seq", OutputParamType[1])
|
|
else:
|
|
OutputParamType[1]
|
|
|
|
let responseVar = ident("response")
|
|
userHandlerCall = newStmtList(
|
|
newVarStmt(responseVar,
|
|
newCall(ident"init", OutputParamType,
|
|
peerVar, streamVar)),
|
|
msg.genUserHandlerCall(msgVar, [peerVar], outputParam = responseVar))
|
|
|
|
protocol.outRecvProcs.add quote do:
|
|
template `callUserHandler`(`MSG`: type `MsgStrongRecName`,
|
|
`peerVar`: `Peer`,
|
|
`streamVar`: `Connection`,
|
|
`msgVar`: `MsgRecName`): untyped =
|
|
`userHandlerCall`
|
|
|
|
proc `protocolMounterName`(`networkVar`: `Eth2Node`) =
|
|
proc snappyThunk(`streamVar`: `Connection`,
|
|
`protocolVar`: string): Future[void] {.gcsafe.} =
|
|
return handleIncomingStream(`networkVar`, `streamVar`,
|
|
`MsgStrongRecName`)
|
|
|
|
mount `networkVar`.switch,
|
|
LPProtocol(codec: `codecNameLit` & "ssz_snappy",
|
|
handler: snappyThunk)
|
|
|
|
##
|
|
## Implement Senders and Handshake
|
|
##
|
|
if msg.kind == msgHandshake:
|
|
macros.error "Handshake messages are not supported in LibP2P protocols"
|
|
else:
|
|
var sendProc = msg.createSendProc()
|
|
implementSendProcBody sendProc
|
|
|
|
protocol.outProcRegistrations.add(
|
|
newCall(registerMsg,
|
|
protocol.protocolInfoVar,
|
|
msgNameLit,
|
|
protocolMounterName,
|
|
codecNameLit))
|
|
|
|
result.implementProtocolInit = proc (p: P2PProtocol): NimNode =
|
|
return newCall(initProtocol, newLit(p.name), p.peerInit, p.netInit)
|
|
|
|
proc setupNat(conf: BeaconNodeConf): tuple[ip: Option[ValidIpAddress],
|
|
tcpPort: Port,
|
|
udpPort: Port] {.gcsafe.} =
|
|
# defaults
|
|
result.tcpPort = conf.tcpPort
|
|
result.udpPort = conf.udpPort
|
|
|
|
var nat: NatStrategy
|
|
case conf.nat.toLowerAscii:
|
|
of "any":
|
|
nat = NatAny
|
|
of "none":
|
|
nat = NatNone
|
|
of "upnp":
|
|
nat = NatUpnp
|
|
of "pmp":
|
|
nat = NatPmp
|
|
else:
|
|
if conf.nat.startsWith("extip:"):
|
|
try:
|
|
# any required port redirection is assumed to be done by hand
|
|
result.ip = some(ValidIpAddress.init(conf.nat[6..^1]))
|
|
nat = NatNone
|
|
except ValueError:
|
|
error "nor a valid IP address", address = conf.nat[6..^1]
|
|
quit QuitFailure
|
|
else:
|
|
error "not a valid NAT mechanism", value = conf.nat
|
|
quit QuitFailure
|
|
|
|
if nat != NatNone:
|
|
let extIp = getExternalIP(nat)
|
|
if extIP.isSome:
|
|
result.ip = some(ValidIpAddress.init extIp.get)
|
|
# TODO redirectPorts in considered a gcsafety violation
|
|
# because it obtains the address of a non-gcsafe proc?
|
|
let extPorts = ({.gcsafe.}:
|
|
redirectPorts(tcpPort = result.tcpPort,
|
|
udpPort = result.udpPort,
|
|
description = clientId))
|
|
if extPorts.isSome:
|
|
(result.tcpPort, result.udpPort) = extPorts.get()
|
|
|
|
func asLibp2pKey*(key: keys.PublicKey): PublicKey =
|
|
PublicKey(scheme: Secp256k1, skkey: secp.SkPublicKey(key))
|
|
|
|
func asEthKey*(key: PrivateKey): keys.PrivateKey =
|
|
keys.PrivateKey(key.skkey)
|
|
|
|
proc initAddress*(T: type MultiAddress, str: string): T =
|
|
let address = MultiAddress.init(str)
|
|
if IPFS.match(address) and matchPartial(multiaddress.TCP, address):
|
|
result = address
|
|
else:
|
|
raise newException(MultiAddressError,
|
|
"Invalid bootstrap node multi-address")
|
|
|
|
template tcpEndPoint(address, port): auto =
|
|
MultiAddress.init(address, tcpProtocol, port)
|
|
|
|
proc getPersistentNetKeys*(
|
|
rng: var BrHmacDrbgContext, conf: BeaconNodeConf): KeyPair =
|
|
let
|
|
privKeyPath = conf.dataDir / networkKeyFilename
|
|
privKey =
|
|
if not fileExists(privKeyPath):
|
|
createDir conf.dataDir.string
|
|
let key = PrivateKey.random(Secp256k1, rng).tryGet()
|
|
writeFile(privKeyPath, key.getBytes().tryGet())
|
|
key
|
|
else:
|
|
let keyBytes = readFile(privKeyPath)
|
|
PrivateKey.init(keyBytes.toOpenArrayByte(0, keyBytes.high)).tryGet()
|
|
|
|
KeyPair(seckey: privKey, pubkey: privKey.getKey().tryGet())
|
|
|
|
func gossipId(data: openArray[byte]): string =
|
|
# https://github.com/ethereum/eth2.0-specs/blob/v0.12.2/specs/phase0/p2p-interface.md#topics-and-messages
|
|
base64.encode(Base64Url, sha256.digest(data).data)
|
|
|
|
func msgIdProvider(m: messages.Message): string =
|
|
gossipId(m.data)
|
|
|
|
proc createEth2Node*(rng: ref BrHmacDrbgContext, conf: BeaconNodeConf, enrForkId: ENRForkID): Eth2Node {.gcsafe.} =
|
|
var
|
|
(extIp, extTcpPort, extUdpPort) = setupNat(conf)
|
|
hostAddress = tcpEndPoint(conf.libp2pAddress, conf.tcpPort)
|
|
announcedAddresses = if extIp.isNone(): @[]
|
|
else: @[tcpEndPoint(extIp.get(), extTcpPort)]
|
|
|
|
info "Initializing networking", hostAddress,
|
|
announcedAddresses
|
|
|
|
let keys = getPersistentNetKeys(rng[], conf)
|
|
# TODO nim-libp2p still doesn't have support for announcing addresses
|
|
# that are different from the host address (this is relevant when we
|
|
# are running behind a NAT).
|
|
var switch = newStandardSwitch(some keys.seckey, hostAddress,
|
|
triggerSelf = true, gossip = true,
|
|
sign = false, verifySignature = false,
|
|
transportFlags = {ServerFlags.ReuseAddr},
|
|
msgIdProvider = msgIdProvider,
|
|
secureManagers = [
|
|
SecureProtocol.Noise, # Only noise in ETH2!
|
|
],
|
|
rng = rng)
|
|
result = Eth2Node.init(conf, enrForkId, switch,
|
|
extIp, extTcpPort, extUdpPort,
|
|
keys.seckey.asEthKey, rng = rng)
|
|
|
|
proc getPersistenBootstrapAddr*(rng: var BrHmacDrbgContext, conf: BeaconNodeConf,
|
|
ip: ValidIpAddress, port: Port): EnrResult[enr.Record] =
|
|
let pair = getPersistentNetKeys(rng, conf)
|
|
return enr.Record.init(1'u64, # sequence number
|
|
pair.seckey.asEthKey,
|
|
some(ip), port, port, @[])
|
|
|
|
proc announcedENR*(node: Eth2Node): enr.Record =
|
|
doAssert node.discovery != nil, "The Eth2Node must be initialized"
|
|
node.discovery.localNode.record
|
|
|
|
proc shortForm*(id: KeyPair): string =
|
|
$PeerID.init(id.pubkey)
|
|
|
|
let BOOTSTRAP_NODE_CHECK_INTERVAL = 30.seconds
|
|
proc checkIfConnectedToBootstrapNode(p: pointer) {.gcsafe.} =
|
|
# Keep showing warnings until we connect to at least one bootstrap node
|
|
# successfully, in order to allow detection of an invalid configuration.
|
|
let node = cast[Eth2Node](p)
|
|
if node.discovery.bootstrapRecords.len > 0 and not successfullyDialledAPeer:
|
|
warn "Failed to connect to any bootstrap node",
|
|
bootstrapEnrs = node.discovery.bootstrapRecords
|
|
addTimer(BOOTSTRAP_NODE_CHECK_INTERVAL, checkIfConnectedToBootstrapNode, p)
|
|
|
|
proc startLookingForPeers*(node: Eth2Node) {.async.} =
|
|
await node.start()
|
|
addTimer(BOOTSTRAP_NODE_CHECK_INTERVAL, checkIfConnectedToBootstrapNode, node[].addr)
|
|
|
|
func peersCount*(node: Eth2Node): int =
|
|
len(node.peerPool)
|
|
|
|
proc subscribe*[MsgType](node: Eth2Node,
|
|
topic: string,
|
|
msgHandler: proc(msg: MsgType) {.gcsafe.} ) {.async, gcsafe.} =
|
|
proc execMsgHandler(topic: string, data: seq[byte]) {.async, gcsafe.} =
|
|
inc nbc_gossip_messages_received
|
|
trace "Incoming pubsub message received",
|
|
len = data.len, topic, msgId = gossipId(data)
|
|
try:
|
|
msgHandler SSZ.decode(snappy.decode(data), MsgType)
|
|
except CatchableError as err:
|
|
debug "Gossip msg handler error",
|
|
msg = err.msg, len = data.len, topic, msgId = gossipId(data)
|
|
|
|
await node.switch.subscribe(topic & "_snappy", execMsgHandler)
|
|
|
|
proc addValidator*[MsgType](node: Eth2Node,
|
|
topic: string,
|
|
msgValidator: proc(msg: MsgType): bool {.gcsafe.} ) =
|
|
# Validate messages as soon as subscribed
|
|
proc execValidator(
|
|
topic: string, message: GossipMsg): Future[bool] {.async, gcsafe.} =
|
|
trace "Validating incoming gossip message",
|
|
len = message.data.len, topic, msgId = gossipId(message.data)
|
|
try:
|
|
return msgValidator SSZ.decode(snappy.decode(message.data), MsgType)
|
|
except CatchableError as err:
|
|
debug "Gossip validation error",
|
|
msg = err.msg, msgId = gossipId(message.data)
|
|
return false
|
|
|
|
node.switch.addValidator(topic & "_snappy", execValidator)
|
|
|
|
proc subscribe*[MsgType](node: Eth2Node,
|
|
topic: string,
|
|
msgHandler: proc(msg: MsgType) {.gcsafe.},
|
|
msgValidator: proc(msg: MsgType): bool {.gcsafe.} ) {.async, gcsafe.} =
|
|
node.addValidator(topic, msgValidator)
|
|
await node.subscribe(topic, msgHandler)
|
|
|
|
proc unsubscribe*(node: Eth2Node, topic: string): Future[void] =
|
|
node.switch.unsubscribeAll(topic)
|
|
|
|
proc traceMessage(fut: FutureBase, msgId: string) =
|
|
fut.addCallback do (arg: pointer):
|
|
if not(fut.failed):
|
|
trace "Outgoing pubsub message sent", msgId
|
|
elif fut.error != nil:
|
|
debug "Gossip message not sent", msgId, err = fut.error.msg
|
|
else:
|
|
debug "Unexpected future state for gossip", msgId, state = fut.state
|
|
|
|
proc broadcast*(node: Eth2Node, topic: string, msg: auto) =
|
|
inc nbc_gossip_messages_sent
|
|
let
|
|
data = snappy.encode(SSZ.encode(msg))
|
|
var futSnappy = node.switch.publish(topic & "_snappy", data, 1.minutes)
|
|
traceMessage(futSnappy, gossipId(data))
|