250 lines
7.7 KiB
Nim
250 lines
7.7 KiB
Nim
# Nimbus - Portal Network
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# 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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import
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std/[options, strutils, tables],
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confutils, confutils/std/net, chronicles, chronicles/topics_registry,
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chronos, metrics, metrics/chronos_httpserver, stew/byteutils,
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nimcrypto/[hash, sha2],
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eth/[keys, net/nat],
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eth/p2p/discoveryv5/[enr, node],
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eth/p2p/discoveryv5/protocol as discv5_protocol,
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../network/wire/[messages, portal_protocol],
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../network/state/state_content
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const
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DefaultListenAddress* = (static ValidIpAddress.init("0.0.0.0"))
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DefaultAdminListenAddress* = (static ValidIpAddress.init("127.0.0.1"))
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DefaultListenAddressDesc = $DefaultListenAddress
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DefaultAdminListenAddressDesc = $DefaultAdminListenAddress
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type
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PortalCmd* = enum
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noCommand
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ping
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findnode
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findcontent
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DiscoveryConf* = object
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logLevel* {.
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defaultValue: LogLevel.DEBUG
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defaultValueDesc: $LogLevel.DEBUG
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desc: "Sets the log level"
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name: "log-level" .}: LogLevel
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udpPort* {.
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defaultValue: 9009
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desc: "UDP listening port"
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name: "udp-port" .}: uint16
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listenAddress* {.
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defaultValue: DefaultListenAddress
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defaultValueDesc: $DefaultListenAddressDesc
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desc: "Listening address for the Discovery v5 traffic"
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name: "listen-address" }: ValidIpAddress
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bootnodes* {.
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desc: "ENR URI of node to bootstrap discovery with. Argument may be repeated"
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name: "bootnode" .}: seq[enr.Record]
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nat* {.
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desc: "Specify method to use for determining public address. " &
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"Must be one of: any, none, upnp, pmp, extip:<IP>"
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defaultValue: NatConfig(hasExtIp: false, nat: NatAny)
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defaultValueDesc: "any"
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name: "nat" .}: NatConfig
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enrAutoUpdate* {.
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defaultValue: false
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desc: "Discovery can automatically update its ENR with the IP address " &
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"and UDP port as seen by other nodes it communicates with. " &
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"This option allows to enable/disable this functionality"
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name: "enr-auto-update" .}: bool
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nodeKey* {.
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desc: "P2P node private key as hex",
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defaultValue: PrivateKey.random(keys.newRng()[])
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defaultValueDesc: "random"
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name: "nodekey" .}: PrivateKey
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portalBootnodes* {.
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desc: "ENR URI of node to bootstrap the Portal protocol with. Argument may be repeated"
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name: "portal-bootnode" .}: seq[Record]
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metricsEnabled* {.
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defaultValue: false
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desc: "Enable the metrics server"
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name: "metrics" .}: bool
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metricsAddress* {.
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defaultValue: DefaultAdminListenAddress
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defaultValueDesc: $DefaultAdminListenAddressDesc
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desc: "Listening address of the metrics server"
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name: "metrics-address" .}: ValidIpAddress
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metricsPort* {.
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defaultValue: 8008
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desc: "Listening HTTP port of the metrics server"
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name: "metrics-port" .}: Port
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case cmd* {.
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command
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defaultValue: noCommand }: PortalCmd
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of noCommand:
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discard
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of ping:
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pingTarget* {.
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argument
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desc: "ENR URI of the node to a send ping message"
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name: "node" .}: Node
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of findnode:
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distance* {.
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defaultValue: 255
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desc: "Distance parameter for the findNode message"
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name: "distance" .}: uint16
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# TODO: Order here matters as else the help message does not show all the
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# information, see: https://github.com/status-im/nim-confutils/issues/15
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findNodeTarget* {.
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argument
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desc: "ENR URI of the node to send a findNode message"
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name: "node" .}: Node
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of findcontent:
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findContentTarget* {.
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argument
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desc: "ENR URI of the node to send a findContent message"
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name: "node" .}: Node
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proc parseCmdArg*(T: type enr.Record, p: TaintedString): T =
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if not fromURI(result, p):
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raise newException(ConfigurationError, "Invalid ENR")
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proc completeCmdArg*(T: type enr.Record, val: TaintedString): seq[string] =
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return @[]
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proc parseCmdArg*(T: type Node, p: TaintedString): T =
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var record: enr.Record
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if not fromURI(record, p):
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raise newException(ConfigurationError, "Invalid ENR")
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let n = newNode(record)
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if n.isErr:
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raise newException(ConfigurationError, $n.error)
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if n[].address.isNone():
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raise newException(ConfigurationError, "ENR without address")
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n[]
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proc completeCmdArg*(T: type Node, val: TaintedString): seq[string] =
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return @[]
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proc parseCmdArg*(T: type PrivateKey, p: TaintedString): T =
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try:
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result = PrivateKey.fromHex(string(p)).tryGet()
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except CatchableError:
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raise newException(ConfigurationError, "Invalid private key")
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proc completeCmdArg*(T: type PrivateKey, val: TaintedString): seq[string] =
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return @[]
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proc discover(d: discv5_protocol.Protocol) {.async.} =
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while true:
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let discovered = await d.queryRandom()
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info "Lookup finished", nodes = discovered.len
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await sleepAsync(30.seconds)
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proc testHandler(contentKey: state_content.ByteList): ContentResult =
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# Note: We don't incorperate storage in this tool so we always return
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# missing content. For now we are using the state network derivation but it
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# could be selective based on the network the tool is used for.
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let contentId = toContentId(contentKey)
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if contentId.isSome():
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ContentResult(kind: ContentMissing, contentId: contentId.get())
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else:
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ContentResult(kind: ContentKeyValidationFailure,
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error: "Failed decoding content key")
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proc run(config: DiscoveryConf) =
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let
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rng = newRng()
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bindIp = config.listenAddress
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udpPort = Port(config.udpPort)
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# TODO: allow for no TCP port mapping!
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(extIp, _, extUdpPort) = setupAddress(config.nat,
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config.listenAddress, udpPort, udpPort, "dcli")
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let d = newProtocol(config.nodeKey,
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extIp, none(Port), extUdpPort,
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bootstrapRecords = config.bootnodes,
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bindIp = bindIp, bindPort = udpPort,
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enrAutoUpdate = config.enrAutoUpdate,
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rng = rng)
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d.open()
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# TODO: Configurable protocol id
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let portal = PortalProtocol.new(d, [byte 0x50, 0x0A], testHandler,
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bootstrapRecords = config.portalBootnodes)
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if config.metricsEnabled:
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let
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address = config.metricsAddress
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port = config.metricsPort
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notice "Starting metrics HTTP server",
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url = "http://" & $address & ":" & $port & "/metrics"
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try:
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chronos_httpserver.startMetricsHttpServer($address, port)
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except CatchableError as exc: raise exc
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except Exception as exc: raiseAssert exc.msg # TODO fix metrics
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case config.cmd
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of ping:
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let pong = waitFor portal.ping(config.pingTarget)
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if pong.isOk():
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echo pong.get()
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else:
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echo pong.error
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of findnode:
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let distances = List[uint16, 256](@[config.distance])
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let nodes = waitFor portal.findNode(config.findNodeTarget, distances)
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if nodes.isOk():
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echo nodes.get()
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else:
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echo nodes.error
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of findcontent:
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proc random(T: type UInt256, rng: var BrHmacDrbgContext): T =
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var key: UInt256
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brHmacDrbgGenerate(addr rng, addr key, csize_t(sizeof(key)))
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key
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# For now just some random bytes
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let contentKey = ByteList.init(@[1'u8])
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let foundContent = waitFor portal.findContent(config.findContentTarget,
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contentKey)
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if foundContent.isOk():
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echo foundContent.get()
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else:
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echo foundContent.error
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of noCommand:
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d.start()
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portal.start()
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waitfor(discover(d))
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when isMainModule:
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let config = DiscoveryConf.load()
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setLogLevel(config.logLevel)
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run(config)
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