mirror of https://github.com/status-im/nim-eth.git
76 lines
2.3 KiB
Nim
76 lines
2.3 KiB
Nim
import
|
|
std/[hashes],
|
|
chronos, chronicles,
|
|
../p2p/discoveryv5/[protocol, node],
|
|
./utp_router,
|
|
../keys
|
|
|
|
type UtpDiscv5Protocol* = ref object of TalkProtocol
|
|
prot: protocol.Protocol
|
|
router: UtpRouter[Node]
|
|
|
|
proc hash(x: UtpSocketKey[Node]): Hash =
|
|
var h = 0
|
|
h = h !& x.remoteAddress.hash
|
|
h = h !& x.rcvId.hash
|
|
!$h
|
|
|
|
proc initSendCallback(t: protocol.Protocol, subProtocolName: seq[byte]): SendCallback[Node] =
|
|
return (
|
|
proc (to: Node, data: seq[byte]): Future[void] =
|
|
let fut = newFuture[void]()
|
|
# TODO In discvoveryv5 each talkreq wait for talkresp, but here we would really
|
|
# like the fire and forget semantics (similar to udp).
|
|
# For now start talkreq/response in background, and discard its result.
|
|
# That way we also lose information about any possible errors.
|
|
# Cosider adding talkreq proc which does not wait for response,
|
|
discard t.talkreq(to, subProtocolName, data)
|
|
fut.complete()
|
|
return fut
|
|
)
|
|
|
|
proc messageHandler*(protocol: TalkProtocol, request: seq[byte],
|
|
srcId: NodeId, srcUdpAddress: Address): seq[byte] =
|
|
let p = UtpDiscv5Protocol(protocol)
|
|
let maybeSender = p.prot.getNode(srcId)
|
|
|
|
if maybeSender.isSome():
|
|
let sender = maybeSender.unsafeGet()
|
|
# processIncomingBytes may respond to remote by using talkreq requests
|
|
asyncSpawn p.router.processIncomingBytes(request, sender)
|
|
# We always sending empty response as discv5 spec requires that talkreq always
|
|
# receive talkresp
|
|
@[]
|
|
else:
|
|
@[]
|
|
|
|
proc new*(
|
|
T: type UtpDiscv5Protocol,
|
|
p: protocol.Protocol,
|
|
subProtocolName: seq[byte],
|
|
acceptConnectionCb: AcceptConnectionCallback[Node],
|
|
socketConfig: SocketConfig = SocketConfig.init(),
|
|
rng = newRng()): UtpDiscv5Protocol {.raises: [Defect, CatchableError].} =
|
|
doAssert(not(isNil(acceptConnectionCb)))
|
|
|
|
let router = UtpRouter[Node].new(
|
|
acceptConnectionCb,
|
|
socketConfig,
|
|
rng
|
|
)
|
|
router.sendCb = initSendCallback(p, subProtocolName)
|
|
|
|
let prot = UtpDiscv5Protocol(
|
|
protocolHandler: messageHandler,
|
|
prot: p,
|
|
router: router
|
|
)
|
|
|
|
p.registerTalkProtocol(subProtocolName, prot).expect(
|
|
"Only one protocol should have this id"
|
|
)
|
|
prot
|
|
|
|
proc connectTo*(r: UtpDiscv5Protocol, address: Node): Future[UtpSocket[Node]]=
|
|
return r.router.connectTo(address)
|