mirror of https://github.com/status-im/nim-eth.git
132 lines
4.4 KiB
Nim
132 lines
4.4 KiB
Nim
# Copyright (c) 2021 Status Research & Development GmbH
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# Licensed and distributed under either of
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# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
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# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
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# at your option. This file may not be copied, modified, or distributed except according to those terms.
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{.push raises: [Defect].}
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import
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std/[hashes, sugar],
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chronos, chronicles,
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../p2p/discoveryv5/[protocol, messages, encoding],
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./utp_router,
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../keys
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export utp_router, protocol, chronicles
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logScope:
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topics = "utp_discv5_protocol"
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type
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NodeAddress* = object
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nodeId*: NodeId
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address*: Address
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UtpDiscv5Protocol* = ref object of TalkProtocol
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prot: protocol.Protocol
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router: UtpRouter[NodeAddress]
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proc init*(T: type NodeAddress, nodeId: NodeId, address: Address): NodeAddress =
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NodeAddress(nodeId: nodeId, address: address)
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proc init*(T: type NodeAddress, node: Node): Option[NodeAddress] =
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node.address.map((address: Address) => NodeAddress(nodeId: node.id, address: address))
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proc hash(x: NodeAddress): Hash =
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var h = 0
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h = h !& x.nodeId.hash
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h = h !& x.address.hash
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!$h
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proc hash(x: UtpSocketKey[NodeAddress]): Hash =
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var h = 0
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h = h !& x.remoteAddress.hash
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h = h !& x.rcvId.hash
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!$h
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func `$`*(x: UtpSocketKey[NodeAddress]): string =
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"(remoteId: " & $x.remoteAddress.nodeId &
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", remoteAddress: " & $x.remoteAddress.address &
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", rcvId: "& $x.rcvId &
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")"
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proc talkReqDirect(p: protocol.Protocol, n: NodeAddress, protocol, request: seq[byte]): Future[void] =
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let
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reqId = RequestId.init(p.rng[])
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message = encodeMessage(TalkReqMessage(protocol: protocol, request: request), reqId)
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(data, nonce) = encodeMessagePacket(p.rng[], p.codec, n.nodeId, n.address, message)
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trace "Send message packet", dstId = n.nodeId, address = n.address, kind = MessageKind.talkreq
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p.send(n.address, data)
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proc initSendCallback(
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t: protocol.Protocol, subProtocolName: seq[byte]): SendCallback[NodeAddress] =
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return (
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proc (to: NodeAddress, data: seq[byte]): Future[void] =
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let fut = newFuture[void]()
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# hidden assumption here is that nodes already have established discv5 session
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# between each other. In our use case this should be true as openning stream
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# is only done after succesful OFFER/ACCEPT or FINDCONTENT/CONTENT exchange
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# which forces nodes to establish session between each other.
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discard t.talkReqDirect(to, subProtocolName, data)
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fut.complete()
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return fut
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)
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proc messageHandler(protocol: TalkProtocol, request: seq[byte],
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srcId: NodeId, srcUdpAddress: Address): seq[byte] =
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let
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p = UtpDiscv5Protocol(protocol)
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nodeAddress = NodeAddress.init(srcId, srcUdpAddress)
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debug "Received utp payload from known node. Start processing",
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nodeId = nodeAddress.nodeId, address = nodeAddress.address
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asyncSpawn p.router.processIncomingBytes(request, nodeAddress)
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proc new*(
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T: type UtpDiscv5Protocol,
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p: protocol.Protocol,
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subProtocolName: seq[byte],
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acceptConnectionCb: AcceptConnectionCallback[NodeAddress],
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allowConnectionCb: AllowConnectionCallback[NodeAddress] = nil,
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socketConfig: SocketConfig = SocketConfig.init()): UtpDiscv5Protocol =
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doAssert(not(isNil(acceptConnectionCb)))
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let router = UtpRouter[NodeAddress].new(
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acceptConnectionCb,
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allowConnectionCb,
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socketConfig,
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p.rng
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)
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router.sendCb = initSendCallback(p, subProtocolName)
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let prot = UtpDiscv5Protocol(
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protocolHandler: messageHandler,
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prot: p,
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router: router
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)
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p.registerTalkProtocol(subProtocolName, prot).expect(
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"Only one protocol should have this id"
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)
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prot
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proc connectTo*(r: UtpDiscv5Protocol, address: NodeAddress):
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Future[ConnectionResult[NodeAddress]] =
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return r.router.connectTo(address)
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proc connectTo*(r: UtpDiscv5Protocol, address: NodeAddress, connectionId: uint16):
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Future[ConnectionResult[NodeAddress]] =
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return r.router.connectTo(address, connectionId)
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proc shutdown*(r: UtpDiscv5Protocol) =
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## Closes all managed utp connections in background (does not close discovery,
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## this is up to user)
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r.router.shutdown()
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proc shutdownWait*(r: UtpDiscv5Protocol) {.async.} =
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## Closes all managed utp connections in background (does not close discovery,
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## this is up to user)
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await r.router.shutdownWait()
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