when (NimMajor, NimMinor) < (1, 4): {.push raises: [Defect].} else: {.push raises: [].} import std/[tables,strutils,times,sequtils], stew/results, stew/shims/net, chronicles, chronicles/topics_registry, chronos, chronos/timer as ctime, confutils, eth/keys, eth/p2p/discoveryv5/enr, libp2p/crypto/crypto, libp2p/nameresolving/dnsresolver, metrics, metrics/chronos_httpserver, presto/[route, server, client] import ../../waku/v2/waku_core, ../../waku/v2/node/peer_manager, ../../waku/v2/waku_node, ../../waku/v2/waku_enr, ../../waku/v2/waku_discv5, ../../waku/v2/waku_dnsdisc, ./networkmonitor_metrics, ./networkmonitor_config, ./networkmonitor_utils logScope: topics = "networkmonitor" proc setDiscoveredPeersCapabilities( routingTableNodes: seq[Node]) = for capability in @[Relay, Store, Filter, Lightpush]: let nOfNodesWithCapability = routingTableNodes.countIt(it.record.supportsCapability(capability)) info "capabilities as per ENR waku flag", capability=capability, amount=nOfNodesWithCapability peer_type_as_per_enr.set(int64(nOfNodesWithCapability), labelValues = [$capability]) # TODO: Split in discover, connect proc setConnectedPeersMetrics(discoveredNodes: seq[Node], node: WakuNode, timeout: chronos.Duration, restClient: RestClientRef, allPeers: CustomPeersTableRef) {.async.} = let currentTime = $getTime() # Protocols and agent string and its count var allProtocols: Table[string, int] var allAgentStrings: Table[string, int] # iterate all newly discovered nodes for discNode in discoveredNodes: let typedRecord = discNode.record.toTypedRecord() if not typedRecord.isOk(): warn "could not convert record to typed record", record=discNode.record continue let secp256k1 = typedRecord.get().secp256k1 if not secp256k1.isSome(): warn "could not get secp256k1 key", typedRecord=typedRecord.get() continue # create new entry if new peerId found let peerId = secp256k1.get().toHex() let customPeerInfo = CustomPeerInfo(peerId: peerId) if not allPeers.hasKey(peerId): allPeers[peerId] = customPeerInfo allPeers[peerId].lastTimeDiscovered = currentTime allPeers[peerId].enr = discNode.record.toURI() allPeers[peerId].enrCapabilities = discNode.record.getCapabilities().mapIt($it) if not typedRecord.get().ip.isSome(): warn "ip field is not set", record=typedRecord.get() continue let ip = $typedRecord.get().ip.get().join(".") allPeers[peerId].ip = ip let peer = toRemotePeerInfo(discNode.record) if not peer.isOk(): warn "error converting record to remote peer info", record=discNode.record continue # try to connect to the peer # TODO: check last connection time and if not > x, skip connecting let timedOut = not await node.connectToNodes(@[peer.get()]).withTimeout(timeout) if timedOut: warn "could not connect to peer, timedout", timeout=timeout, peer=peer.get() # TODO: Add other staates allPeers[peerId].connError = "timedout" continue # after connection, get supported protocols let lp2pPeerStore = node.switch.peerStore let nodeProtocols = lp2pPeerStore[ProtoBook][peer.get().peerId] allPeers[peerId].supportedProtocols = nodeProtocols allPeers[peerId].lastTimeConnected = currentTime # after connection, get user-agent let nodeUserAgent = lp2pPeerStore[AgentBook][peer.get().peerId] allPeers[peerId].userAgent = nodeUserAgent # store avaiable protocols in the network for protocol in nodeProtocols: if not allProtocols.hasKey(protocol): allProtocols[protocol] = 0 allProtocols[protocol] += 1 # store available user-agents in the network if not allAgentStrings.hasKey(nodeUserAgent): allAgentStrings[nodeUserAgent] = 0 allAgentStrings[nodeUserAgent] += 1 debug "connected to peer", peer=allPeers[customPeerInfo.peerId] # inform the total connections that we did in this round let nOfOkConnections = allProtocols.len() info "number of successful connections", amount=nOfOkConnections # update count on each protocol for protocol in allProtocols.keys(): let countOfProtocols = allProtocols[protocol] peer_type_as_per_protocol.set(int64(countOfProtocols), labelValues = [protocol]) info "supported protocols in the network", protocol=protocol, count=countOfProtocols # update count on each user-agent for userAgent in allAgentStrings.keys(): let countOfUserAgent = allAgentStrings[userAgent] peer_user_agents.set(int64(countOfUserAgent), labelValues = [userAgent]) info "user agents participating in the network", userAgent=userAgent, count=countOfUserAgent proc populateInfoFromIp(allPeersRef: CustomPeersTableRef, restClient: RestClientRef) {.async.} = for peer in allPeersRef.keys(): if allPeersRef[peer].country != "" and allPeersRef[peer].city != "": continue # TODO: Update also if last update > x if allPeersRef[peer].ip == "": continue # get more info the peers from its ip address var location: NodeLocation try: # IP-API endpoints are now limited to 45 HTTP requests per minute await sleepAsync(1400.millis) let response = await restClient.ipToLocation(allPeersRef[peer].ip) location = response.data except CatchableError: warn "could not get location", ip=allPeersRef[peer].ip continue allPeersRef[peer].country = location.country allPeersRef[peer].city = location.city # TODO: Split in discovery, connections, and ip2location # crawls the network discovering peers and trying to connect to them # metrics are processed and exposed proc crawlNetwork(node: WakuNode, restClient: RestClientRef, conf: NetworkMonitorConf, allPeersRef: CustomPeersTableRef) {.async.} = let crawlInterval = conf.refreshInterval * 1000 while true: # discover new random nodes let discoveredNodes = await node.wakuDiscv5.protocol.queryRandom() # nodes are nested into bucket, flat it let flatNodes = node.wakuDiscv5.protocol.routingTable.buckets.mapIt(it.nodes).flatten() # populate metrics related to capabilities as advertised by the ENR (see waku field) setDiscoveredPeersCapabilities(flatNodes) # tries to connect to all newly discovered nodes # and populates metrics related to peers we could connect # note random discovered nodes can be already known await setConnectedPeersMetrics(discoveredNodes, node, conf.timeout, restClient, allPeersRef) # populate info from ip addresses await populateInfoFromIp(allPeersRef, restClient) let totalNodes = flatNodes.len let seenNodes = flatNodes.countIt(it.seen) info "discovered nodes: ", total=totalNodes, seen=seenNodes # Notes: # we dont run ipMajorityLoop # we dont run revalidateLoop await sleepAsync(crawlInterval.millis) proc retrieveDynamicBootstrapNodes(dnsDiscovery: bool, dnsDiscoveryUrl: string, dnsDiscoveryNameServers: seq[ValidIpAddress]): Result[seq[RemotePeerInfo], string] = if dnsDiscovery and dnsDiscoveryUrl != "": # DNS discovery debug "Discovering nodes using Waku DNS discovery", url=dnsDiscoveryUrl var nameServers: seq[TransportAddress] for ip in dnsDiscoveryNameServers: nameServers.add(initTAddress(ip, Port(53))) # Assume all servers use port 53 let dnsResolver = DnsResolver.new(nameServers) proc resolver(domain: string): Future[string] {.async, gcsafe.} = trace "resolving", domain=domain let resolved = await dnsResolver.resolveTxt(domain) return resolved[0] # Use only first answer var wakuDnsDiscovery = WakuDnsDiscovery.init(dnsDiscoveryUrl, resolver) if wakuDnsDiscovery.isOk(): return wakuDnsDiscovery.get().findPeers() .mapErr(proc (e: cstring): string = $e) else: warn "Failed to init Waku DNS discovery" debug "No method for retrieving dynamic bootstrap nodes specified." ok(newSeq[RemotePeerInfo]()) # Return an empty seq by default proc getBootstrapFromDiscDns(conf: NetworkMonitorConf): Result[seq[enr.Record], string] = try: let dnsNameServers = @[ValidIpAddress.init("1.1.1.1"), ValidIpAddress.init("1.0.0.1")] let dynamicBootstrapNodesRes = retrieveDynamicBootstrapNodes(true, conf.dnsDiscoveryUrl, dnsNameServers) if not dynamicBootstrapNodesRes.isOk(): error("failed discovering peers from DNS") let dynamicBootstrapNodes = dynamicBootstrapNodesRes.get() # select dynamic bootstrap nodes that have an ENR containing a udp port. # Discv5 only supports UDP https://github.com/ethereum/devp2p/blob/master/discv5/discv5-theory.md) var discv5BootstrapEnrs: seq[enr.Record] for n in dynamicBootstrapNodes: if n.enr.isSome(): let enr = n.enr.get() tenrRes = enr.toTypedRecord() if tenrRes.isOk() and (tenrRes.get().udp.isSome() or tenrRes.get().udp6.isSome()): discv5BootstrapEnrs.add(enr) return ok(discv5BootstrapEnrs) except CatchableError: error("failed discovering peers from DNS") proc initAndStartNode(conf: NetworkMonitorConf): Result[WakuNode, string] = let # some hardcoded parameters rng = keys.newRng() nodeKey = crypto.PrivateKey.random(Secp256k1, rng[])[] nodeTcpPort = Port(60000) nodeUdpPort = Port(9000) flags = CapabilitiesBitfield.init(lightpush = false, filter = false, store = false, relay = true) try: let bindIp = ValidIpAddress.init("0.0.0.0") extIp = ValidIpAddress.init("127.0.0.1") var builder = WakuNodeBuilder.init() builder.withNodeKey(nodeKey) ? builder.withNetworkConfigurationDetails(bindIp, nodeTcpPort) let node = ? builder.build() var discv5BootstrapEnrsRes = getBootstrapFromDiscDns(conf) if not discv5BootstrapEnrsRes.isOk(): error("failed discovering peers from DNS") var discv5BootstrapEnrs = discv5BootstrapEnrsRes.get() # parse enrURIs from the configuration and add the resulting ENRs to the discv5BootstrapEnrs seq for enrUri in conf.bootstrapNodes: addBootstrapNode(enrUri, discv5BootstrapEnrs) # mount discv5 node.wakuDiscv5 = WakuDiscoveryV5.new( some(extIp), some(nodeTcpPort), some(nodeUdpPort), bindIp, nodeUdpPort, discv5BootstrapEnrs, false, keys.PrivateKey(nodeKey.skkey), flags, @[], node.rng) node.wakuDiscv5.protocol.open() return ok(node) except CatchableError: error("could not start node") proc startRestApiServer(conf: NetworkMonitorConf, allPeersInfo: CustomPeersTableRef, numMessagesPerContentTopic: ContentTopicMessageTableRef ): Result[void, string] = try: let serverAddress = initTAddress(conf.metricsRestAddress & ":" & $conf.metricsRestPort) proc validate(pattern: string, value: string): int = if pattern.startsWith("{") and pattern.endsWith("}"): 0 else: 1 var router = RestRouter.init(validate) router.installHandler(allPeersInfo, numMessagesPerContentTopic) var sres = RestServerRef.new(router, serverAddress) let restServer = sres.get() restServer.start() except CatchableError: error("could not start rest api server") ok() # handles rx of messages over a topic (see subscribe) # counts the number of messages per content topic proc subscribeAndHandleMessages(node: WakuNode, pubsubTopic: PubsubTopic, msgPerContentTopic: ContentTopicMessageTableRef) = # handle function proc handler(pubsubTopic: PubsubTopic, data: seq[byte]) {.async, gcsafe.} = let messageRes = WakuMessage.decode(data) if messageRes.isErr(): warn "could not decode message", data=data, pubsubTopic=pubsubTopic let message = messageRes.get() trace "rx message", pubsubTopic=pubsubTopic, contentTopic=message.contentTopic # If we reach a table limit size, remove c topics with the least messages. let tableSize = 100 if msgPerContentTopic.len > (tableSize - 1): let minIndex = toSeq(msgPerContentTopic.values()).minIndex() msgPerContentTopic.del(toSeq(msgPerContentTopic.keys())[minIndex]) # TODO: Will overflow at some point # +1 if content topic existed, init to 1 otherwise if msgPerContentTopic.hasKey(message.contentTopic): msgPerContentTopic[message.contentTopic] += 1 else: msgPerContentTopic[message.contentTopic] = 1 node.subscribe(pubsubTopic, handler) when isMainModule: # known issue: confutils.nim(775, 17) Error: can raise an unlisted exception: ref IOError {.pop.} let confRes = NetworkMonitorConf.loadConfig() if confRes.isErr(): error "could not load cli variables", err=confRes.error quit(1) let conf = confRes.get() info "cli flags", conf=conf if conf.logLevel != LogLevel.NONE: setLogLevel(conf.logLevel) # list of peers that we have discovered/connected var allPeersInfo = CustomPeersTableRef() # content topic and the number of messages that were received var msgPerContentTopic = ContentTopicMessageTableRef() # start metrics server if conf.metricsServer: let res = startMetricsServer(conf.metricsServerAddress, Port(conf.metricsServerPort)) if res.isErr(): error "could not start metrics server", err=res.error quit(1) # start rest server for custom metrics let res = startRestApiServer(conf, allPeersInfo, msgPerContentTopic) if res.isErr(): error "could not start rest api server", err=res.error quit(1) # create a rest client let clientRest = RestClientRef.new(url="http://ip-api.com", connectTimeout=ctime.seconds(2)) if clientRest.isErr(): error "could not start rest api client", err=res.error quit(1) let restClient = clientRest.get() # start waku node let nodeRes = initAndStartNode(conf) if nodeRes.isErr(): error "could not start node" quit 1 let node = nodeRes.get() waitFor node.mountRelay() # Subscribe the node to the default pubsubtopic, to count messages subscribeAndHandleMessages(node, DefaultPubsubTopic, msgPerContentTopic) # spawn the routine that crawls the network # TODO: split into 3 routines (discovery, connections, ip2location) asyncSpawn crawlNetwork(node, restClient, conf, allPeersInfo) runForever()