Enable IPv6 for discovery5 using dualstack support. (#6242)

* Make listen-address default to use dualstack.

* Use correct newProtocol().

* Bump nim-eth.

* Bump nim-eth one more time.

* Use `*` instead of IPv6 address for dualstack sockets.

* Bump chronos and nim-eth.

* Use new constructor.

* Fix listenAddress should be Opt[T] not Option[T].

* Fix options.md.

beacon_chain/conf.nim

@@ -21,6 +21,7 @@ import
   eth/common/eth_types as commonEthTypes, eth/net/nat,
   eth/p2p/discoveryv5/enr,
   json_serialization, web3/[primitives, confutils_defs],
+  chronos/transports/common,
   kzg4844/kzg_ex,
   ./spec/[engine_authentication, keystore, network, crypto],
   ./spec/datatypes/base,
@@ -49,14 +50,11 @@ declareGauge network_name, "network name", ["name"]
 const
   # TODO: How should we select between IPv4 and IPv6
   # Maybe there should be a config option for this.
-  defaultListenAddress* = (static parseIpAddress("0.0.0.0"))
   defaultAdminListenAddress* = (static parseIpAddress("127.0.0.1"))
   defaultSigningNodeRequestTimeout* = 60
   defaultBeaconNode* = "http://127.0.0.1:" & $defaultEth2RestPort
   defaultBeaconNodeUri* = parseUri(defaultBeaconNode)
   defaultGasLimit* = 30_000_000
-
-  defaultListenAddressDesc* = $defaultListenAddress
   defaultAdminListenAddressDesc* = $defaultAdminListenAddress
   defaultBeaconNodeDesc = $defaultBeaconNode
 
@@ -292,9 +290,8 @@ type
 
       listenAddress* {.
         desc: "Listening address for the Ethereum LibP2P and Discovery v5 traffic"
-        defaultValue: defaultListenAddress
-        defaultValueDesc: $defaultListenAddressDesc
-        name: "listen-address" .}: IpAddress
+        defaultValueDesc: "*"
+        name: "listen-address" .}: Option[IpAddress]
 
       tcpPort* {.
         desc: "Listening TCP port for Ethereum LibP2P traffic"
@@ -1497,3 +1494,9 @@ proc loadKzgTrustedSetup*(trustedSetupPath: string): Result[void, string] =
     Kzg.loadTrustedSetupFromString(readFile(trustedSetupPath))
   except IOError as err:
     err(err.msg)
+
+proc formatIt*(v: Option[IpAddress]): string =
+  if v.isSome():
+    $v.get()
+  else:
+    "*"

beacon_chain/conf_light_client.nim

@@ -63,9 +63,7 @@ type LightClientConf* = object
 
   listenAddress* {.
     desc: "Listening address for the Ethereum LibP2P and Discovery v5 traffic"
-    defaultValue: defaultListenAddress
-    defaultValueDesc: $defaultListenAddressDesc
-    name: "listen-address" .}: IpAddress
+    name: "listen-address" .}: Option[IpAddress]
 
   tcpPort* {.
     desc: "Listening TCP port for Ethereum LibP2P traffic"

beacon_chain/networking/eth2_discovery.nim

@@ -96,8 +96,14 @@ proc new*(T: type Eth2DiscoveryProtocol,
     if fileExists(persistentBootstrapFile):
       loadBootstrapFile(persistentBootstrapFile, bootstrapEnrs)
 
+  let listenAddress =
+    if config.listenAddress.isSome():
+      Opt.some(config.listenAddress.get())
+    else:
+      Opt.none(IpAddress)
+
   newProtocol(pk, enrIp, enrTcpPort, enrUdpPort, enrFields, bootstrapEnrs,
-    bindPort = config.udpPort, bindIp = config.listenAddress,
+    bindPort = config.udpPort, bindIp = listenAddress,
     enrAutoUpdate = config.enrAutoUpdate, rng = rng)
 
 func isCompatibleForkId*(discoveryForkId: ENRForkID, peerForkId: ENRForkID): bool =

beacon_chain/networking/eth2_network.nim

@@ -2255,10 +2255,15 @@ proc createEth2Node*(rng: ref HmacDrbgContext,
     discoveryForkId = getDiscoveryForkID(
       cfg, getBeaconTime().slotOrZero.epoch, genesis_validators_root)
 
-    (extIp, extTcpPort, extUdpPort) = try: setupAddress(
-      config.nat, config.listenAddress, config.tcpPort, config.udpPort,
-      clientId)
-    except CatchableError as exc: raise exc
+    listenAddress =
+      if config.listenAddress.isSome():
+        config.listenAddress.get()
+      else:
+        getAutoAddress(Port(0)).toIpAddress()
+
+    (extIp, extTcpPort, extUdpPort) =
+      setupAddress(config.nat, listenAddress, config.tcpPort,
+                   config.udpPort, clientId)
 
     directPeers = block:
       var res: DirectPeers
@@ -2278,7 +2283,7 @@ proc createEth2Node*(rng: ref HmacDrbgContext,
         info "Adding privileged direct peer", peerId, address
       res
 
-    hostAddress = tcpEndPoint(config.listenAddress, config.tcpPort)
+    hostAddress = tcpEndPoint(listenAddress, config.tcpPort)
     announcedAddresses =
       if extIp.isNone() or extTcpPort.isNone(): @[]
       else: @[tcpEndPoint(extIp.get(), extTcpPort.get())]

docs/the_nimbus_book/src/options.md

@@ -55,7 +55,7 @@ The following options are available:
                                verifying/generating JWT tokens.
  -b, --bootstrap-node          Specifies one or more bootstrap nodes to use when connecting to the network.
      --bootstrap-file          Specifies a line-delimited file of bootstrap Ethereum network addresses.
-     --listen-address          Listening address for the Ethereum LibP2P and Discovery v5 traffic [=0.0.0.0].
+     --listen-address          Listening address for the Ethereum LibP2P and Discovery v5 traffic [=*].
      --tcp-port                Listening TCP port for Ethereum LibP2P traffic [=9000].
      --udp-port                Listening UDP port for node discovery [=9000].
      --max-peers               The target number of peers to connect to [=160].

vendor/nim-chronos

@@ -1 +1 @@
-Subproject commit 0d050d582306e8c521c3a4a6f6dcb3c83c93a90f
+Subproject commit bb96f02ae877e04230dac85c040e66656b7d2ef0

vendor/nim-eth

@@ -1 +1 @@
-Subproject commit d66a29db7ca4372dba116928f979e92cb7f7661f
+Subproject commit 4cd9e27c09117b284b91978fe6cdd76a181925f7