nim-libp2p/tests/testdcutr.nim

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# Nim-LibP2P
# Copyright (c) 2023 Status Research & Development GmbH
# Licensed under either of
# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
# * MIT license ([LICENSE-MIT](LICENSE-MIT))
# at your option.
# This file may not be copied, modified, or distributed except according to
# those terms.
import chronos
import unittest2
import ../libp2p/protocols/connectivity/dcutr/core as dcore
import ../libp2p/protocols/connectivity/dcutr/[client, server]
from ../libp2p/protocols/connectivity/autonat/core import NetworkReachability
import ../libp2p/builders
import ../libp2p/utils/future
import ./helpers
import ./stubs/switchstub
suite "Dcutr":
teardown:
checkTrackers()
asyncTest "Connect msg Encode / Decode":
let addrs = @[MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet(), MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet()]
let connectMsg = DcutrMsg(msgType: MsgType.Connect, addrs: addrs)
let pb = connectMsg.encode()
let connectMsgDecoded = DcutrMsg.decode(pb.buffer)
check connectMsg == connectMsgDecoded
asyncTest "Sync msg Encode / Decode":
let addrs = @[MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet(), MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet()]
let syncMsg = DcutrMsg(msgType: MsgType.Sync, addrs: addrs)
let pb = syncMsg.encode()
let syncMsgDecoded = DcutrMsg.decode(pb.buffer)
check syncMsg == syncMsgDecoded
asyncTest "DCUtR establishes a new connection":
let behindNATSwitch = newStandardSwitch()
let publicSwitch = newStandardSwitch()
let dcutrProto = Dcutr.new(publicSwitch)
publicSwitch.mount(dcutrProto)
await allFutures(behindNATSwitch.start(), publicSwitch.start())
await publicSwitch.connect(behindNATSwitch.peerInfo.peerId, behindNATSwitch.peerInfo.addrs)
for t in behindNATSwitch.transports:
t.networkReachability = NetworkReachability.NotReachable
expect CatchableError:
# we can't hole punch when both peers are in the same machine. This means that the simultaneous dialings will result
# in two connections attemps, instead of one. This dial is going to fail because the dcutr client is acting as the
# tcp simultaneous incoming upgrader in the dialer which works only in the simultaneous open case.
await DcutrClient.new().startSync(behindNATSwitch, publicSwitch.peerInfo.peerId, behindNATSwitch.peerInfo.addrs)
.wait(300.millis)
checkExpiring:
# we still expect a new connection to be open by the receiver peer acting as the dcutr server
behindNATSwitch.connManager.connCount(publicSwitch.peerInfo.peerId) == 2
await allFutures(behindNATSwitch.stop(), publicSwitch.stop())
template ductrClientTest(behindNATSwitch: Switch, publicSwitch: Switch, body: untyped) =
let dcutrProto = Dcutr.new(publicSwitch)
publicSwitch.mount(dcutrProto)
await allFutures(behindNATSwitch.start(), publicSwitch.start())
await publicSwitch.connect(behindNATSwitch.peerInfo.peerId, behindNATSwitch.peerInfo.addrs)
for t in behindNATSwitch.transports:
t.networkReachability = NetworkReachability.NotReachable
body
checkExpiring:
# we still expect a new connection to be open by the receiver peer acting as the dcutr server
behindNATSwitch.connManager.connCount(publicSwitch.peerInfo.peerId) == 2
await allFutures(behindNATSwitch.stop(), publicSwitch.stop())
asyncTest "Client connect timeout":
proc connectTimeoutProc(): Future[void] {.async.} =
await sleepAsync(100.millis)
let behindNATSwitch = SwitchStub.new(newStandardSwitch(), connectTimeoutProc)
let publicSwitch = newStandardSwitch()
ductrClientTest(behindNATSwitch, publicSwitch):
try:
let client = DcutrClient.new(connectTimeout = 5.millis)
await client.startSync(behindNATSwitch, publicSwitch.peerInfo.peerId, behindNATSwitch.peerInfo.addrs)
except DcutrError as err:
check err.parent of AsyncTimeoutError
asyncTest "All client connect attempts fail":
proc connectErrorProc(): Future[void] {.async.} =
raise newException(CatchableError, "error")
let behindNATSwitch = SwitchStub.new(newStandardSwitch(), connectErrorProc)
let publicSwitch = newStandardSwitch()
ductrClientTest(behindNATSwitch, publicSwitch):
try:
let client = DcutrClient.new(connectTimeout = 5.millis)
await client.startSync(behindNATSwitch, publicSwitch.peerInfo.peerId, behindNATSwitch.peerInfo.addrs)
except DcutrError as err:
check err.parent of AllFuturesFailedError
proc ductrServerTest(connectStub: proc (): Future[void] {.async.}) {.async.} =
let behindNATSwitch = newStandardSwitch()
let publicSwitch = SwitchStub.new(newStandardSwitch())
let dcutrProto = Dcutr.new(publicSwitch, connectTimeout = 5.millis)
publicSwitch.mount(dcutrProto)
await allFutures(behindNATSwitch.start(), publicSwitch.start())
await publicSwitch.connect(behindNATSwitch.peerInfo.peerId, behindNATSwitch.peerInfo.addrs)
publicSwitch.connectStub = connectStub
for t in behindNATSwitch.transports:
t.networkReachability = NetworkReachability.NotReachable
expect CatchableError:
# we can't hole punch when both peers are in the same machine. This means that the simultaneous dialings will result
# in two connections attemps, instead of one. This dial is going to fail because the dcutr client is acting as the
# tcp simultaneous incoming upgrader in the dialer which works only in the simultaneous open case.
await DcutrClient.new().startSync(behindNATSwitch, publicSwitch.peerInfo.peerId, behindNATSwitch.peerInfo.addrs)
.wait(300.millis)
checkExpiring:
# we still expect a new connection to be open by the receiver peer acting as the dcutr server
behindNATSwitch.connManager.connCount(publicSwitch.peerInfo.peerId) == 1
await allFutures(behindNATSwitch.stop(), publicSwitch.stop())
asyncTest "DCUtR server timeout when establishing a new connection":
proc connectProc(): Future[void] {.async.} =
await sleepAsync(100.millis)
await ductrServerTest(connectProc)
asyncTest "DCUtR server error when establishing a new connection":
proc connectProc(): Future[void] {.async.} =
raise newException(CatchableError, "error")
await ductrServerTest(connectProc)